Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

97 files changed, 39119 insertions, 0 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
new file mode 100644
index 000000000..19abf11c8
--- /dev/null
+++ b/drivers/ide/Kconfig
@@ -0,0 +1,849 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# IDE ATA ATAPI Block device driver configuration
+#
+
+# Select HAVE_IDE if IDE is supported
+config HAVE_IDE
+	bool
+
+menuconfig IDE
+	tristate "ATA/ATAPI/MFM/RLL support (DEPRECATED)"
+	depends on HAVE_IDE
+	depends on BLOCK
+	select BLK_SCSI_REQUEST
+	help
+	  If you say Y here, your kernel will be able to manage ATA/(E)IDE and
+	  ATAPI units. The most common cases are IDE hard drives and ATAPI
+	  CD-ROM drives.
+
+	  This subsystem is currently in maintenance mode with only bug fix
+	  changes applied. Users of ATA hardware are encouraged to migrate to
+	  the newer ATA subsystem ("Serial ATA (prod) and Parallel ATA
+	  (experimental) drivers") which is more actively maintained.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ide-core.
+
+	  For further information, please read <file:Documentation/ide/ide.rst>.
+
+	  If unsure, say N.
+
+if IDE
+
+comment "Please see Documentation/ide/ide.rst for help/info on IDE drives"
+
+config IDE_XFER_MODE
+	bool
+
+config IDE_TIMINGS
+	bool
+	select IDE_XFER_MODE
+
+config IDE_ATAPI
+	bool
+
+config IDE_LEGACY
+	bool
+
+config BLK_DEV_IDE_SATA
+	bool "Support for SATA (deprecated; conflicts with libata SATA driver)"
+	default n
+	help
+	  There are two drivers for Serial ATA controllers.
+
+	  The main driver, "libata", uses the SCSI subsystem
+	  and supports most modern SATA controllers. In order to use it
+	  you may take a look at "Serial ATA (prod) and Parallel ATA
+	  (experimental) drivers".
+
+	  The IDE driver (which you are currently configuring) supports
+	  a few first-generation SATA controllers.
+
+	  In order to eliminate conflicts between the two subsystems,
+	  this config option enables the IDE driver's SATA support.
+	  Normally this is disabled, as it is preferred that libata
+	  supports SATA controllers, and this (IDE) driver supports
+	  PATA controllers.
+
+	  If unsure, say N.
+
+config IDE_GD
+	tristate "generic ATA/ATAPI disk support"
+	default y
+	help
+	  Support for ATA/ATAPI disks (including ATAPI floppy drives).
+
+	  To compile this driver as a module, choose M here.
+	  The module will be called ide-gd_mod.
+
+	  If unsure, say Y.
+
+config IDE_GD_ATA
+	bool "ATA disk support"
+	depends on IDE_GD
+	default y
+	help
+	  This will include support for ATA hard disks.
+
+	  If unsure, say Y.
+
+config IDE_GD_ATAPI
+	bool "ATAPI floppy support"
+	depends on IDE_GD
+	select IDE_ATAPI
+	help
+	  This will include support for ATAPI floppy drives
+	  (i.e. Iomega ZIP or MKE LS-120).
+
+	  For information about jumper settings and the question
+	  of when a ZIP drive uses a partition table, see
+	  <http://www.win.tue.nl/~aeb/linux/zip/zip-1.html>.
+
+	  If unsure, say N.
+
+config BLK_DEV_IDECS
+	tristate "PCMCIA IDE support"
+	depends on PCMCIA
+	help
+	  Support for Compact Flash cards, outboard IDE disks, tape drives,
+	  and CD-ROM drives connected through a PCMCIA card.
+
+config BLK_DEV_DELKIN
+	tristate "Cardbus IDE support (Delkin/ASKA/Workbit)"
+	depends on CARDBUS && PCI
+	help
+	  Support for Delkin, ASKA, and Workbit Cardbus CompactFlash
+	  Adapters.  This may also work for similar SD and XD adapters.
+
+config BLK_DEV_IDECD
+	tristate "Include IDE/ATAPI CDROM support"
+	depends on BLK_DEV
+	select IDE_ATAPI
+	select CDROM
+	help
+	  If you have a CD-ROM drive using the ATAPI protocol, say Y. ATAPI is
+	  a newer protocol used by IDE CD-ROM and TAPE drives, similar to the
+	  SCSI protocol. Most new CD-ROM drives use ATAPI, including the
+	  NEC-260, Mitsumi FX400, Sony 55E, and just about all non-SCSI
+	  double(2X) or better speed drives.
+
+	  If you say Y here, the CD-ROM drive will be identified at boot time
+	  along with other IDE devices, as "hdb" or "hdc", or something
+	  similar (check the boot messages with dmesg). If this is your only
+	  CD-ROM drive, you can say N to all other CD-ROM options, but be sure
+	  to say Y or M to "ISO 9660 CD-ROM file system support".
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ide-cd.
+
+config BLK_DEV_IDECD_VERBOSE_ERRORS
+	bool "Verbose error logging for IDE/ATAPI CDROM driver" if EXPERT
+	depends on BLK_DEV_IDECD
+	default y
+	help
+	  Turn this on to have the driver print out the meanings of the
+	  ATAPI error codes.  This will use up additional 8kB of kernel-space
+	  memory, though.
+
+config BLK_DEV_IDETAPE
+	tristate "Include IDE/ATAPI TAPE support"
+	select IDE_ATAPI
+	help
+	  If you have an IDE tape drive using the ATAPI protocol, say Y.
+	  ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
+	  similar to the SCSI protocol.  If you have an SCSI tape drive
+	  however, you can say N here.
+
+	  You should also say Y if you have an OnStream DI-30 tape drive; this
+	  will not work with the SCSI protocol, until there is support for the
+	  SC-30 and SC-50 versions.
+
+	  If you say Y here, the tape drive will be identified at boot time
+	  along with other IDE devices, as "hdb" or "hdc", or something
+	  similar, and will be mapped to a character device such as "ht0"
+	  (check the boot messages with dmesg).  Be sure to consult the
+	  <file:drivers/ide/ide-tape.c> and <file:Documentation/ide/ide.rst>
+	  files for usage information.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ide-tape.
+
+config BLK_DEV_IDEACPI
+	bool "IDE ACPI support"
+	depends on ACPI
+	help
+	  Implement ACPI support for generic IDE devices. On modern
+	  machines ACPI support is required to properly handle ACPI S3 states.
+
+config IDE_TASK_IOCTL
+	bool "IDE Taskfile Access"
+	help
+	  This is a direct raw access to the media.  It is a complex but
+	  elegant solution to test and validate the domain of the hardware and
+	  perform below the driver data recovery if needed.  This is the most
+	  basic form of media-forensics.
+
+	  If you are unsure, say N here.
+
+config IDE_PROC_FS
+	bool "legacy /proc/ide/ support"
+	depends on IDE && PROC_FS
+	default y
+	help
+	  This option enables support for the various files in
+	  /proc/ide.  In Linux 2.6 this has been superseded by
+	  files in sysfs but many legacy applications rely on this.
+
+	  If unsure say Y.
+
+comment "IDE chipset support/bugfixes"
+
+config IDE_GENERIC
+	tristate "generic/default IDE chipset support"
+	depends on ALPHA || X86 || IA64 || MIPS || ARCH_RPC
+	default ARM && ARCH_RPC
+	help
+	  This is the generic IDE driver.  This driver attaches to the
+	  fixed legacy ports (e.g. on PCs 0x1f0/0x170, 0x1e8/0x168 and
+	  so on).  Please note that if this driver is built into the
+	  kernel or loaded before other ATA (IDE or libata) drivers
+	  and the controller is located at legacy ports, this driver
+	  may grab those ports and thus can prevent the controller
+	  specific driver from attaching.
+
+	  Also, currently, IDE generic doesn't allow IRQ sharing
+	  meaning that the IRQs it grabs won't be available to other
+	  controllers sharing those IRQs which usually makes drivers
+	  for those controllers fail.  Generally, it's not a good idea
+	  to load IDE generic driver on modern systems.
+
+	  If unsure, say N.
+
+config BLK_DEV_PLATFORM
+	tristate "Platform driver for IDE interfaces"
+	help
+	  This is the platform IDE driver, used mostly for Memory Mapped
+	  IDE devices, like Compact Flashes running in True IDE mode.
+
+	  If unsure, say N.
+
+config BLK_DEV_CMD640
+	tristate "CMD640 chipset bugfix/support"
+	depends on X86
+	select IDE_TIMINGS
+	help
+	  The CMD-Technologies CMD640 IDE chip is used on many common 486 and
+	  Pentium motherboards, usually in combination with a "Neptune" or
+	  "SiS" chipset. Unfortunately, it has a number of rather nasty
+	  design flaws that can cause severe data corruption under many common
+	  conditions. Say Y here to include code which tries to automatically
+	  detect and correct the problems under Linux. This option also
+	  enables access to the secondary IDE ports in some CMD640 based
+	  systems.
+
+	  This driver will work automatically in PCI based systems (most new
+	  systems have PCI slots). But if your system uses VESA local bus
+	  (VLB) instead of PCI, you must also supply a kernel boot parameter
+	  to enable the CMD640 bugfix/support: "cmd640.probe_vlb". (Try "man
+	  bootparam" or see the documentation of your boot loader about how to
+	  pass options to the kernel.)
+
+	  The CMD640 chip is also used on add-in cards by Acculogic, and on
+	  the "CSA-6400E PCI to IDE controller" that some people have. For
+	  details, read <file:Documentation/ide/ide.rst>.
+
+config BLK_DEV_CMD640_ENHANCED
+	bool "CMD640 enhanced support"
+	depends on BLK_DEV_CMD640
+	help
+	  This option includes support for setting/autotuning PIO modes and
+	  prefetch on CMD640 IDE interfaces.  For details, read
+	  <file:Documentation/ide/ide.rst>. If you have a CMD640 IDE interface
+	  and your BIOS does not already do this for you, then say Y here.
+	  Otherwise say N.
+
+config BLK_DEV_IDEPNP
+	tristate "PNP EIDE support"
+	depends on PNP
+	help
+	  If you have a PnP (Plug and Play) compatible EIDE card and
+	  would like the kernel to automatically detect and activate
+	  it, say Y here.
+
+config BLK_DEV_IDEDMA_SFF
+	bool
+
+if PCI
+
+comment "PCI IDE chipsets support"
+
+config BLK_DEV_IDEPCI
+	bool
+
+config IDEPCI_PCIBUS_ORDER
+	bool "Probe IDE PCI devices in the PCI bus order (DEPRECATED)"
+	depends on IDE=y && BLK_DEV_IDEPCI
+	default y
+	help
+	  Probe IDE PCI devices in the order in which they appear on the
+	  PCI bus (i.e. 00:1f.1 PCI device before 02:01.0 PCI device)
+	  instead of the order in which IDE PCI host drivers are loaded.
+
+	  Please note that this method of assuring stable naming of
+	  IDE devices is unreliable and use other means for achieving
+	  it (i.e. udev).
+
+	  If in doubt, say N.
+
+# TODO: split it on per host driver config options (or module parameters)
+config BLK_DEV_OFFBOARD
+	bool "Boot off-board chipsets first support (DEPRECATED)"
+	depends on BLK_DEV_IDEPCI && (BLK_DEV_AEC62XX || BLK_DEV_GENERIC || BLK_DEV_HPT366 || BLK_DEV_PDC202XX_NEW || BLK_DEV_PDC202XX_OLD || BLK_DEV_TC86C001)
+	help
+	  Normally, IDE controllers built into the motherboard (on-board
+	  controllers) are assigned to ide0 and ide1 while those on add-in PCI
+	  cards (off-board controllers) are relegated to ide2 and ide3.
+	  Answering Y here will allow you to reverse the situation, with
+	  off-board controllers on ide0/1 and on-board controllers on ide2/3.
+	  This can improve the usability of some boot managers such as lilo
+	  when booting from a drive on an off-board controller.
+
+	  Note that, if you do this, the order of the hd* devices will be
+	  rearranged which may require modification of fstab and other files.
+
+	  Please also note that this method of assuring stable naming of
+	  IDE devices is unreliable and use other means for achieving it
+	  (i.e. udev).
+
+	  If in doubt, say N.
+
+config BLK_DEV_GENERIC
+	tristate "Generic PCI IDE Chipset Support"
+	select BLK_DEV_IDEPCI
+	help
+	  This option provides generic support for various PCI IDE Chipsets
+	  which otherwise might not be supported.
+
+config BLK_DEV_OPTI621
+	tristate "OPTi 82C621 chipset enhanced support"
+	select BLK_DEV_IDEPCI
+	help
+	  This is a driver for the OPTi 82C621 EIDE controller.
+	  Please read the comments at the top of <file:drivers/ide/opti621.c>.
+
+config BLK_DEV_RZ1000
+	tristate "RZ1000 chipset bugfix/support"
+	depends on X86
+	select BLK_DEV_IDEPCI
+	help
+	  The PC-Technologies RZ1000 IDE chip is used on many common 486 and
+	  Pentium motherboards, usually along with the "Neptune" chipset.
+	  Unfortunately, it has a rather nasty design flaw that can cause
+	  severe data corruption under many conditions. Say Y here to include
+	  code which automatically detects and corrects the problem under
+	  Linux. This may slow disk throughput by a few percent, but at least
+	  things will operate 100% reliably.
+
+config BLK_DEV_IDEDMA_PCI
+	bool
+	select BLK_DEV_IDEPCI
+	select BLK_DEV_IDEDMA_SFF
+
+config BLK_DEV_AEC62XX
+	tristate "AEC62XX chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds explicit support for Acard AEC62xx (Artop ATP8xx)
+	  IDE controllers. This allows the kernel to change PIO, DMA and UDMA
+	  speeds and to configure the chip to optimum performance.
+
+config BLK_DEV_ALI15X3
+	tristate "ALI M15x3 chipset support"
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver ensures (U)DMA support for ALI 1533, 1543 and 1543C
+	  onboard chipsets.  It also tests for Simplex mode and enables
+	  normal dual channel support.
+
+	  Please read the comments at the top of
+	  <file:drivers/ide/alim15x3.c>.
+
+	  If unsure, say N.
+
+config BLK_DEV_AMD74XX
+	tristate "AMD and nVidia IDE support"
+	depends on !ARM
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds explicit support for AMD-7xx and AMD-8111 chips
+	  and also for the nVidia nForce chip.  This allows the kernel to
+	  change PIO, DMA and UDMA speeds and to configure the chip to
+	  optimum performance.
+
+config BLK_DEV_ATIIXP
+	tristate "ATI IXP chipset IDE support"
+	depends on X86
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds explicit support for ATI IXP chipset.
+	  This allows the kernel to change PIO, DMA and UDMA speeds
+	  and to configure the chip to optimum performance.
+
+	  Say Y here if you have an ATI IXP chipset IDE controller.
+
+config BLK_DEV_CMD64X
+	tristate "CMD64{3|6|8|9} chipset support"
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Say Y here if you have an IDE controller which uses any of these
+	  chipsets: CMD643, CMD646, or CMD648.
+
+config BLK_DEV_TRIFLEX
+	tristate "Compaq Triflex IDE support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Say Y here if you have a Compaq Triflex IDE controller, such
+	  as those commonly found on Compaq Pentium-Pro systems
+
+config BLK_DEV_CY82C693
+	tristate "CY82C693 chipset support"
+	depends on ALPHA
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds detection and support for the CY82C693 chipset
+	  used on Digital's PC-Alpha 164SX boards.
+
+config BLK_DEV_CS5520
+	tristate "Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENTAL)"
+	depends on X86_32 || COMPILE_TEST
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Include support for PIO tuning and virtual DMA on the Cyrix MediaGX
+	  5510/5520 chipset. This will automatically be detected and
+	  configured if found.
+
+	  It is safe to say Y to this question.
+
+config BLK_DEV_CS5530
+	tristate "Cyrix/National Semiconductor CS5530 MediaGX chipset support"
+	depends on X86_32 || COMPILE_TEST
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Include support for UDMA on the Cyrix MediaGX 5530 chipset. This
+	  will automatically be detected and configured if found.
+
+	  It is safe to say Y to this question.
+
+config BLK_DEV_CS5535
+	tristate "AMD CS5535 chipset support"
+	depends on X86_32
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Include support for UDMA on the NSC/AMD CS5535 companion chipset.
+	  This will automatically be detected and configured if found.
+
+	  It is safe to say Y to this question.
+
+config BLK_DEV_CS5536
+	tristate "CS5536 chipset support"
+	depends on X86_32
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This option enables support for the AMD CS5536
+	  companion chip used with the Geode LX processor family.
+
+	  If unsure, say N.
+
+config BLK_DEV_HPT366
+	tristate "HPT36X/37X chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  HPT366 is an Ultra DMA chipset for ATA-66.
+	  HPT368 is an Ultra DMA chipset for ATA-66 RAID Based.
+	  HPT370 is an Ultra DMA chipset for ATA-100.
+	  HPT372 is an Ultra DMA chipset for ATA-100.
+	  HPT374 is an Ultra DMA chipset for ATA-100.
+
+	  This driver adds up to 4 more EIDE devices sharing a single
+	  interrupt.
+
+	  The HPT366 chipset in its current form is bootable. One solution
+	  for this problem are special LILO commands for redirecting the
+	  reference to device 0x80. The other solution is to say Y to "Boot
+	  off-board chipsets first support" (CONFIG_BLK_DEV_OFFBOARD) unless
+	  your mother board has the chipset natively mounted. Regardless one
+	  should use the fore mentioned option and call at LILO.
+
+	  This driver requires dynamic tuning of the chipset during the
+	  ide-probe at boot. It is reported to support DVD II drives, by the
+	  manufacturer.
+
+config BLK_DEV_JMICRON
+	tristate "JMicron JMB36x support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Basic support for the JMicron ATA controllers. For full support
+	  use the libata drivers.
+
+config BLK_DEV_SC1200
+	tristate "National SCx200 chipset support"
+	depends on X86_32 || COMPILE_TEST
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds support for the on-board IDE controller on the
+	  National SCx200 series of embedded x86 "Geode" systems.
+
+config BLK_DEV_PIIX
+	tristate "Intel PIIX/ICH chipsets support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds explicit support for Intel PIIX and ICH chips.
+	  This allows the kernel to change PIO, DMA and UDMA speeds and to
+	  configure the chip to optimum performance.
+
+config BLK_DEV_IT8172
+	tristate "IT8172 IDE support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds support for the IDE controller on the
+	  IT8172 System Controller.
+
+config BLK_DEV_IT8213
+	tristate "IT8213 IDE support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds support for the ITE 8213 IDE controller.
+
+config BLK_DEV_IT821X
+	tristate "IT821X IDE support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds support for the ITE 8211 IDE controller and the
+	  IT 8212 IDE RAID controller in both RAID and pass-through mode.
+
+config BLK_DEV_NS87415
+	tristate "NS87415 chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds detection and support for the NS87415 chip
+	  (used mainly on SPARC64 and PA-RISC machines).
+
+	  Please read the comments at the top of <file:drivers/ide/ns87415.c>.
+
+config BLK_DEV_PDC202XX_OLD
+	tristate "PROMISE PDC202{46|62|65|67} support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  Promise Ultra33 or PDC20246
+	  Promise Ultra66 or PDC20262
+	  Promise Ultra100 or PDC20265/PDC20267/PDC20268
+
+	  This driver adds up to 4 more EIDE devices sharing a single
+	  interrupt. This add-on card is a bootable PCI UDMA controller. Since
+	  multiple cards can be installed and there are BIOS ROM problems that
+	  happen if the BIOS revisions of all installed cards (three-max) do
+	  not match, the driver attempts to do dynamic tuning of the chipset
+	  at boot-time for max-speed.  Ultra33 BIOS 1.25 or newer is required
+	  for more than one card.
+
+	  Please read the comments at the top of
+	  <file:drivers/ide/pdc202xx_old.c>.
+
+	  If unsure, say N.
+
+config BLK_DEV_PDC202XX_NEW
+	tristate "PROMISE PDC202{68|69|70|71|75|76|77} support"
+	select BLK_DEV_IDEDMA_PCI
+
+config BLK_DEV_SVWKS
+	tristate "ServerWorks OSB4/CSB5/CSB6 chipsets support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds PIO/(U)DMA support for the ServerWorks OSB4/CSB5
+	  chipsets.
+
+config BLK_DEV_SIIMAGE
+	tristate "Silicon Image chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds PIO/(U)DMA support for the SI CMD680 and SII
+	  3112 (Serial ATA) chips.
+
+config BLK_DEV_SIS5513
+	tristate "SiS5513 chipset support"
+	depends on X86
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver ensures (U)DMA support for SIS5513 chipset family based
+	  mainboards.
+
+	  The following chipsets are supported:
+	  ATA16:  SiS5511, SiS5513
+	  ATA33:  SiS5591, SiS5597, SiS5598, SiS5600
+	  ATA66:  SiS530, SiS540, SiS620, SiS630, SiS640
+	  ATA100: SiS635, SiS645, SiS650, SiS730, SiS735, SiS740,
+	  SiS745, SiS750
+
+	  Please read the comments at the top of <file:drivers/ide/sis5513.c>.
+
+config BLK_DEV_SL82C105
+	tristate "Winbond SL82c105 support"
+	depends on (PPC || ARM)
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  If you have a Winbond SL82c105 IDE controller, say Y here to enable
+	  special configuration for this chip. This is common on various CHRP
+	  motherboards, but could be used elsewhere. If in doubt, say Y.
+
+config BLK_DEV_SLC90E66
+	tristate "SLC90E66 chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver ensures (U)DMA support for Victory66 SouthBridges for
+	  SMsC with Intel NorthBridges.  This is an Ultra66 based chipset.
+	  The nice thing about it is that you can mix Ultra/DMA/PIO devices
+	  and it will handle timing cycles.  Since this is an improved
+	  look-a-like to the PIIX4 it should be a nice addition.
+
+	  Please read the comments at the top of
+	  <file:drivers/ide/slc90e66.c>.
+
+config BLK_DEV_TRM290
+	tristate "Tekram TRM290 chipset support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds support for bus master DMA transfers
+	  using the Tekram TRM290 PCI IDE chip. Volunteers are
+	  needed for further tweaking and development.
+	  Please read the comments at the top of <file:drivers/ide/trm290.c>.
+
+config BLK_DEV_VIA82CXXX
+	tristate "VIA82CXXX chipset support"
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver adds explicit support for VIA BusMastering IDE chips.
+	  This allows the kernel to change PIO, DMA and UDMA speeds and to
+	  configure the chip to optimum performance.
+
+config BLK_DEV_TC86C001
+	tristate "Toshiba TC86C001 support"
+	select BLK_DEV_IDEDMA_PCI
+	help
+	This driver adds support for Toshiba TC86C001 GOKU-S chip.
+
+endif
+
+# TODO: BLK_DEV_IDEDMA_PCI -> BLK_DEV_IDEDMA_SFF
+config BLK_DEV_IDE_PMAC
+	tristate "PowerMac on-board IDE support"
+	depends on PPC_PMAC
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_PCI
+	help
+	  This driver provides support for the on-board IDE controller on
+	  most of the recent Apple Power Macintoshes and PowerBooks.
+	  If unsure, say Y.
+
+config BLK_DEV_IDE_PMAC_ATA100FIRST
+	bool "Probe on-board ATA/100 (Kauai) first"
+	depends on BLK_DEV_IDE_PMAC
+	help
+	  This option will cause the ATA/100 controller found in UniNorth2
+	  based machines (Windtunnel PowerMac, Aluminium PowerBooks, ...)
+	  to be probed before the ATA/66 and ATA/33 controllers. Without
+	  these, those machine used to have the hard disk on hdc and the
+	  CD-ROM on hda. This option changes this to more natural hda for
+	  hard disk and hdc for CD-ROM.
+
+config BLK_DEV_IDE_TX4938
+	tristate "TX4938 internal IDE support"
+	depends on SOC_TX4938
+	select IDE_TIMINGS
+
+config BLK_DEV_IDE_TX4939
+	tristate "TX4939 internal IDE support"
+	depends on SOC_TX4939
+	select BLK_DEV_IDEDMA_SFF
+
+config BLK_DEV_IDE_ICSIDE
+	tristate "ICS IDE interface support"
+	depends on ARM && ARCH_ACORN
+	help
+	  On Acorn systems, say Y here if you wish to use the ICS IDE
+	  interface card.  This is not required for ICS partition support.
+	  If you are unsure, say N to this.
+
+config BLK_DEV_IDEDMA_ICS
+	bool "ICS DMA support"
+	depends on BLK_DEV_IDE_ICSIDE
+	help
+	  Say Y here if you want to add DMA (Direct Memory Access) support to
+	  the ICS IDE driver.
+
+config BLK_DEV_IDE_RAPIDE
+	tristate "RapIDE interface support"
+	depends on ARM && ARCH_ACORN
+	help
+	  Say Y here if you want to support the Yellowstone RapIDE controller
+	  manufactured for use with Acorn computers.
+
+config BLK_DEV_GAYLE
+	tristate "Amiga Gayle IDE interface support"
+	depends on AMIGA
+	help
+	  This is the IDE driver for the Amiga Gayle IDE interface. It supports
+	  both the `A1200 style' and `A4000 style' of the Gayle IDE interface,
+	  This includes on-board IDE interfaces on some Amiga models (A600,
+	  A1200, A4000, and A4000T), and IDE interfaces on the Zorro expansion
+	  bus (M-Tech E-Matrix 530 expansion card).
+
+	  It also provides support for the so-called `IDE doublers' (made
+	  by various manufacturers, e.g. Eyetech) that can be connected to
+	  the on-board IDE interface of some Amiga models. Using such an IDE
+	  doubler, you can connect up to four instead of two IDE devices to
+	  the Amiga's on-board IDE interface. The feature is enabled at kernel
+	  runtime using the "gayle.doubler" kernel boot parameter.
+
+	  Say Y if you have an Amiga with a Gayle IDE interface and want to use
+	  IDE devices (hard disks, CD-ROM drives, etc.) that are connected to
+	  it.
+
+	  Note that you also have to enable Zorro bus support if you want to
+	  use Gayle IDE interfaces on the Zorro expansion bus.
+
+config BLK_DEV_BUDDHA
+	tristate "Buddha/Catweasel/X-Surf IDE interface support"
+	depends on ZORRO
+	help
+	  This is the IDE driver for the IDE interfaces on the Buddha, Catweasel
+	  and X-Surf expansion boards.  It supports up to two interfaces on the
+	  Buddha, three on the Catweasel and two on the X-Surf.
+
+	  Say Y if you have a Buddha or Catweasel expansion board and want to
+	  use IDE devices (hard disks, CD-ROM drives, etc.) that are connected
+	  to one of its IDE interfaces.
+
+config BLK_DEV_FALCON_IDE
+	tristate "Falcon IDE interface support"
+	depends on ATARI
+	help
+	  This is the IDE driver for the on-board IDE interface on the Atari
+	  Falcon. Say Y if you have a Falcon and want to use IDE devices (hard
+	  disks, CD-ROM drives, etc.) that are connected to the on-board IDE
+	  interface.
+
+config BLK_DEV_MAC_IDE
+	tristate "Macintosh Quadra/Powerbook IDE interface support"
+	depends on MAC
+	help
+	  This is the IDE driver for the on-board IDE interface on some m68k
+	  Macintosh models, namely Quadra/Centris 630, Performa 588 and
+	  Powerbook 150. The IDE interface on the Powerbook 190 is not
+	  supported by this driver and requires BLK_DEV_PLATFORM or
+	  PATA_PLATFORM.
+
+	  Say Y if you have such an Macintosh model and want to use IDE
+	  devices (hard disks, CD-ROM drives, etc.) that are connected to the
+	  on-board IDE interface.
+
+config BLK_DEV_Q40IDE
+	tristate "Q40/Q60 IDE interface support"
+	depends on Q40
+	help
+	  Enable the on-board IDE controller in the Q40/Q60.  This should
+	  normally be on; disable it only if you are running a custom hard
+	  drive subsystem through an expansion card.
+
+config BLK_DEV_PALMCHIP_BK3710
+	tristate "Palmchip bk3710 IDE controller support"
+	depends on ARCH_DAVINCI
+	select IDE_TIMINGS
+	select BLK_DEV_IDEDMA_SFF
+	help
+	  Say Y here if you want to support the onchip IDE controller on the
+	  TI DaVinci SoC
+
+# no isa -> no vlb
+if ISA && (ALPHA || X86 || MIPS)
+
+comment "Other IDE chipsets support"
+comment "Note: most of these also require special kernel boot parameters"
+
+config BLK_DEV_4DRIVES
+	tristate "Generic 4 drives/port support"
+	help
+	  Certain older chipsets, including the Tekram 690CD, use a single set
+	  of I/O ports at 0x1f0 to control up to four drives, instead of the
+	  customary two drives per port. Support for this can be enabled at
+	  runtime using the "ide-4drives.probe" kernel boot parameter if you
+	  say Y here.
+
+config BLK_DEV_ALI14XX
+	tristate "ALI M14xx support"
+	select IDE_TIMINGS
+	select IDE_LEGACY
+	help
+	  This driver is enabled at runtime using the "ali14xx.probe" kernel
+	  boot parameter.  It enables support for the secondary IDE interface
+	  of the ALI M1439/1443/1445/1487/1489 chipsets, and permits faster
+	  I/O speeds to be set as well.
+	  See the files <file:Documentation/ide/ide.rst> and
+	  <file:drivers/ide/ali14xx.c> for more info.
+
+config BLK_DEV_DTC2278
+	tristate "DTC-2278 support"
+	select IDE_XFER_MODE
+	select IDE_LEGACY
+	help
+	  This driver is enabled at runtime using the "dtc2278.probe" kernel
+	  boot parameter. It enables support for the secondary IDE interface
+	  of the DTC-2278 card, and permits faster I/O speeds to be set as
+	  well. See the <file:Documentation/ide/ide.rst> and
+	  <file:drivers/ide/dtc2278.c> files for more info.
+
+config BLK_DEV_HT6560B
+	tristate "Holtek HT6560B support"
+	select IDE_TIMINGS
+	select IDE_LEGACY
+	help
+	  This driver is enabled at runtime using the "ht6560b.probe" kernel
+	  boot parameter. It enables support for the secondary IDE interface
+	  of the Holtek card, and permits faster I/O speeds to be set as well.
+	  See the <file:Documentation/ide/ide.rst> and
+	  <file:drivers/ide/ht6560b.c> files for more info.
+
+config BLK_DEV_QD65XX
+	tristate "QDI QD65xx support"
+	select IDE_TIMINGS
+	select IDE_LEGACY
+	help
+	  This driver is enabled at runtime using the "qd65xx.probe" kernel
+	  boot parameter.  It permits faster I/O speeds to be set.  See the
+	  <file:Documentation/ide/ide.rst> and <file:drivers/ide/qd65xx.c>
+	  for more info.
+
+config BLK_DEV_UMC8672
+	tristate "UMC-8672 support"
+	select IDE_XFER_MODE
+	select IDE_LEGACY
+	help
+	  This driver is enabled at runtime using the "umc8672.probe" kernel
+	  boot parameter. It enables support for the secondary IDE interface
+	  of the UMC-8672, and permits faster I/O speeds to be set as well.
+	  See the files <file:Documentation/ide/ide.rst> and
+	  <file:drivers/ide/umc8672.c> for more info.
+
+endif
+
+config BLK_DEV_IDEDMA
+	def_bool BLK_DEV_IDEDMA_SFF || BLK_DEV_IDEDMA_ICS
+	select IDE_XFER_MODE
+
+endif # IDE
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
new file mode 100644
index 000000000..2605b3cda
--- /dev/null
+++ b/drivers/ide/Makefile
@@ -0,0 +1,111 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# link order is important here
+#
+
+ide-core-y += ide.o ide-ioctls.o ide-io.o ide-iops.o ide-lib.o ide-probe.o \
+	      ide-taskfile.o ide-pm.o ide-park.o ide-sysfs.o ide-devsets.o \
+	      ide-io-std.o ide-eh.o
+
+# core IDE code
+ide-core-$(CONFIG_IDE_XFER_MODE)	+= ide-pio-blacklist.o ide-xfer-mode.o
+ide-core-$(CONFIG_IDE_TIMINGS)		+= ide-timings.o
+ide-core-$(CONFIG_IDE_ATAPI)		+= ide-atapi.o
+ide-core-$(CONFIG_BLK_DEV_IDEPCI)	+= setup-pci.o
+ide-core-$(CONFIG_BLK_DEV_IDEDMA)	+= ide-dma.o
+ide-core-$(CONFIG_BLK_DEV_IDEDMA_SFF)	+= ide-dma-sff.o
+ide-core-$(CONFIG_IDE_PROC_FS)		+= ide-proc.o
+ide-core-$(CONFIG_BLK_DEV_IDEACPI)	+= ide-acpi.o
+ide-core-$(CONFIG_IDE_LEGACY)		+= ide-legacy.o
+
+obj-$(CONFIG_IDE)			+= ide-core.o
+
+obj-$(CONFIG_BLK_DEV_ALI14XX)		+= ali14xx.o
+obj-$(CONFIG_BLK_DEV_UMC8672)		+= umc8672.o
+obj-$(CONFIG_BLK_DEV_DTC2278)		+= dtc2278.o
+obj-$(CONFIG_BLK_DEV_HT6560B)		+= ht6560b.o
+obj-$(CONFIG_BLK_DEV_QD65XX)		+= qd65xx.o
+obj-$(CONFIG_BLK_DEV_4DRIVES)		+= ide-4drives.o
+
+obj-$(CONFIG_BLK_DEV_GAYLE)		+= gayle.o
+obj-$(CONFIG_BLK_DEV_FALCON_IDE)	+= falconide.o
+obj-$(CONFIG_BLK_DEV_MAC_IDE)		+= macide.o
+obj-$(CONFIG_BLK_DEV_Q40IDE)		+= q40ide.o
+obj-$(CONFIG_BLK_DEV_BUDDHA)		+= buddha.o
+
+obj-$(CONFIG_BLK_DEV_AEC62XX)		+= aec62xx.o
+obj-$(CONFIG_BLK_DEV_ALI15X3)		+= alim15x3.o
+obj-$(CONFIG_BLK_DEV_AMD74XX)		+= amd74xx.o
+obj-$(CONFIG_BLK_DEV_ATIIXP)		+= atiixp.o
+obj-$(CONFIG_BLK_DEV_CMD64X)		+= cmd64x.o
+obj-$(CONFIG_BLK_DEV_CS5520)		+= cs5520.o
+obj-$(CONFIG_BLK_DEV_CS5530)		+= cs5530.o
+obj-$(CONFIG_BLK_DEV_CS5535)		+= cs5535.o
+obj-$(CONFIG_BLK_DEV_CS5536)		+= cs5536.o
+obj-$(CONFIG_BLK_DEV_SC1200)		+= sc1200.o
+obj-$(CONFIG_BLK_DEV_CY82C693)		+= cy82c693.o
+obj-$(CONFIG_BLK_DEV_DELKIN)		+= delkin_cb.o
+obj-$(CONFIG_BLK_DEV_HPT366)		+= hpt366.o
+obj-$(CONFIG_BLK_DEV_IT8172)		+= it8172.o
+obj-$(CONFIG_BLK_DEV_IT8213)		+= it8213.o
+obj-$(CONFIG_BLK_DEV_IT821X)		+= it821x.o
+obj-$(CONFIG_BLK_DEV_JMICRON)		+= jmicron.o
+obj-$(CONFIG_BLK_DEV_NS87415)		+= ns87415.o
+obj-$(CONFIG_BLK_DEV_OPTI621)		+= opti621.o
+obj-$(CONFIG_BLK_DEV_PDC202XX_OLD)	+= pdc202xx_old.o
+obj-$(CONFIG_BLK_DEV_PDC202XX_NEW)	+= pdc202xx_new.o
+obj-$(CONFIG_BLK_DEV_PIIX)		+= piix.o
+obj-$(CONFIG_BLK_DEV_RZ1000)		+= rz1000.o
+obj-$(CONFIG_BLK_DEV_SVWKS)		+= serverworks.o
+obj-$(CONFIG_BLK_DEV_SIIMAGE)		+= siimage.o
+obj-$(CONFIG_BLK_DEV_SIS5513)		+= sis5513.o
+obj-$(CONFIG_BLK_DEV_SL82C105)		+= sl82c105.o
+obj-$(CONFIG_BLK_DEV_SLC90E66)		+= slc90e66.o
+obj-$(CONFIG_BLK_DEV_TC86C001)		+= tc86c001.o
+obj-$(CONFIG_BLK_DEV_TRIFLEX)		+= triflex.o
+obj-$(CONFIG_BLK_DEV_TRM290)		+= trm290.o
+obj-$(CONFIG_BLK_DEV_VIA82CXXX)		+= via82cxxx.o
+
+# Must appear at the end of the block
+obj-$(CONFIG_BLK_DEV_GENERIC)		+= ide-pci-generic.o
+
+obj-$(CONFIG_IDEPCI_PCIBUS_ORDER)	+= ide-scan-pci.o
+
+obj-$(CONFIG_BLK_DEV_CMD640)		+= cmd640.o
+
+obj-$(CONFIG_BLK_DEV_IDE_PMAC)		+= pmac.o
+
+obj-$(CONFIG_IDE_GENERIC)		+= ide-generic.o
+obj-$(CONFIG_BLK_DEV_IDEPNP)		+= ide-pnp.o
+
+ide-gd_mod-y += ide-gd.o
+ide-cd_mod-y += ide-cd.o ide-cd_ioctl.o ide-cd_verbose.o
+
+ifeq ($(CONFIG_IDE_GD_ATA), y)
+	ide-gd_mod-y += ide-disk.o ide-disk_ioctl.o
+ifeq ($(CONFIG_IDE_PROC_FS), y)
+	ide-gd_mod-y += ide-disk_proc.o
+endif
+endif
+
+ifeq ($(CONFIG_IDE_GD_ATAPI), y)
+	ide-gd_mod-y += ide-floppy.o ide-floppy_ioctl.o
+ifeq ($(CONFIG_IDE_PROC_FS), y)
+	ide-gd_mod-y += ide-floppy_proc.o
+endif
+endif
+
+obj-$(CONFIG_IDE_GD)			+= ide-gd_mod.o
+obj-$(CONFIG_BLK_DEV_IDECD)		+= ide-cd_mod.o
+obj-$(CONFIG_BLK_DEV_IDETAPE)		+= ide-tape.o
+
+obj-$(CONFIG_BLK_DEV_IDECS)		+= ide-cs.o
+
+obj-$(CONFIG_BLK_DEV_PLATFORM)		+= ide_platform.o
+
+obj-$(CONFIG_BLK_DEV_IDE_ICSIDE)	+= icside.o
+obj-$(CONFIG_BLK_DEV_IDE_RAPIDE)	+= rapide.o
+obj-$(CONFIG_BLK_DEV_PALMCHIP_BK3710)	+= palm_bk3710.o
+
+obj-$(CONFIG_BLK_DEV_IDE_TX4938)	+= tx4938ide.o
+obj-$(CONFIG_BLK_DEV_IDE_TX4939)	+= tx4939ide.o
diff --git a/drivers/ide/aec62xx.c b/drivers/ide/aec62xx.c
new file mode 100644
index 000000000..4c959ce41
--- /dev/null
+++ b/drivers/ide/aec62xx.c
@@ -0,0 +1,331 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2007		MontaVista Software, Inc. <source@mvista.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "aec62xx"
+
+struct chipset_bus_clock_list_entry {
+	u8 xfer_speed;
+	u8 chipset_settings;
+	u8 ultra_settings;
+};
+
+static const struct chipset_bus_clock_list_entry aec6xxx_33_base [] = {
+	{	XFER_UDMA_6,	0x31,	0x07	},
+	{	XFER_UDMA_5,	0x31,	0x06	},
+	{	XFER_UDMA_4,	0x31,	0x05	},
+	{	XFER_UDMA_3,	0x31,	0x04	},
+	{	XFER_UDMA_2,	0x31,	0x03	},
+	{	XFER_UDMA_1,	0x31,	0x02	},
+	{	XFER_UDMA_0,	0x31,	0x01	},
+
+	{	XFER_MW_DMA_2,	0x31,	0x00	},
+	{	XFER_MW_DMA_1,	0x31,	0x00	},
+	{	XFER_MW_DMA_0,	0x0a,	0x00	},
+	{	XFER_PIO_4,	0x31,	0x00	},
+	{	XFER_PIO_3,	0x33,	0x00	},
+	{	XFER_PIO_2,	0x08,	0x00	},
+	{	XFER_PIO_1,	0x0a,	0x00	},
+	{	XFER_PIO_0,	0x00,	0x00	},
+	{	0,		0x00,	0x00	}
+};
+
+static const struct chipset_bus_clock_list_entry aec6xxx_34_base [] = {
+	{	XFER_UDMA_6,	0x41,	0x06	},
+	{	XFER_UDMA_5,	0x41,	0x05	},
+	{	XFER_UDMA_4,	0x41,	0x04	},
+	{	XFER_UDMA_3,	0x41,	0x03	},
+	{	XFER_UDMA_2,	0x41,	0x02	},
+	{	XFER_UDMA_1,	0x41,	0x01	},
+	{	XFER_UDMA_0,	0x41,	0x01	},
+
+	{	XFER_MW_DMA_2,	0x41,	0x00	},
+	{	XFER_MW_DMA_1,	0x42,	0x00	},
+	{	XFER_MW_DMA_0,	0x7a,	0x00	},
+	{	XFER_PIO_4,	0x41,	0x00	},
+	{	XFER_PIO_3,	0x43,	0x00	},
+	{	XFER_PIO_2,	0x78,	0x00	},
+	{	XFER_PIO_1,	0x7a,	0x00	},
+	{	XFER_PIO_0,	0x70,	0x00	},
+	{	0,		0x00,	0x00	}
+};
+
+/*
+ * TO DO: active tuning and correction of cards without a bios.
+ */
+static u8 pci_bus_clock_list (u8 speed, struct chipset_bus_clock_list_entry * chipset_table)
+{
+	for ( ; chipset_table->xfer_speed ; chipset_table++)
+		if (chipset_table->xfer_speed == speed) {
+			return chipset_table->chipset_settings;
+		}
+	return chipset_table->chipset_settings;
+}
+
+static u8 pci_bus_clock_list_ultra (u8 speed, struct chipset_bus_clock_list_entry * chipset_table)
+{
+	for ( ; chipset_table->xfer_speed ; chipset_table++)
+		if (chipset_table->xfer_speed == speed) {
+			return chipset_table->ultra_settings;
+		}
+	return chipset_table->ultra_settings;
+}
+
+static void aec6210_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	struct ide_host *host	= pci_get_drvdata(dev);
+	struct chipset_bus_clock_list_entry *bus_clock = host->host_priv;
+	u16 d_conf		= 0;
+	u8 ultra = 0, ultra_conf = 0;
+	u8 tmp0 = 0, tmp1 = 0, tmp2 = 0;
+	const u8 speed = drive->dma_mode;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/* 0x40|(2*drive->dn): Active, 0x41|(2*drive->dn): Recovery */
+	pci_read_config_word(dev, 0x40|(2*drive->dn), &d_conf);
+	tmp0 = pci_bus_clock_list(speed, bus_clock);
+	d_conf = ((tmp0 & 0xf0) << 4) | (tmp0 & 0xf);
+	pci_write_config_word(dev, 0x40|(2*drive->dn), d_conf);
+
+	tmp1 = 0x00;
+	tmp2 = 0x00;
+	pci_read_config_byte(dev, 0x54, &ultra);
+	tmp1 = ((0x00 << (2*drive->dn)) | (ultra & ~(3 << (2*drive->dn))));
+	ultra_conf = pci_bus_clock_list_ultra(speed, bus_clock);
+	tmp2 = ((ultra_conf << (2*drive->dn)) | (tmp1 & ~(3 << (2*drive->dn))));
+	pci_write_config_byte(dev, 0x54, tmp2);
+	local_irq_restore(flags);
+}
+
+static void aec6260_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	struct ide_host *host	= pci_get_drvdata(dev);
+	struct chipset_bus_clock_list_entry *bus_clock = host->host_priv;
+	u8 unit			= drive->dn & 1;
+	u8 tmp1 = 0, tmp2 = 0;
+	u8 ultra = 0, drive_conf = 0, ultra_conf = 0;
+	const u8 speed = drive->dma_mode;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/* high 4-bits: Active, low 4-bits: Recovery */
+	pci_read_config_byte(dev, 0x40|drive->dn, &drive_conf);
+	drive_conf = pci_bus_clock_list(speed, bus_clock);
+	pci_write_config_byte(dev, 0x40|drive->dn, drive_conf);
+
+	pci_read_config_byte(dev, (0x44|hwif->channel), &ultra);
+	tmp1 = ((0x00 << (4*unit)) | (ultra & ~(7 << (4*unit))));
+	ultra_conf = pci_bus_clock_list_ultra(speed, bus_clock);
+	tmp2 = ((ultra_conf << (4*unit)) | (tmp1 & ~(7 << (4*unit))));
+	pci_write_config_byte(dev, (0x44|hwif->channel), tmp2);
+	local_irq_restore(flags);
+}
+
+static void aec_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	hwif->port_ops->set_dma_mode(hwif, drive);
+}
+
+static int init_chipset_aec62xx(struct pci_dev *dev)
+{
+	/* These are necessary to get AEC6280 Macintosh cards to work */
+	if ((dev->device == PCI_DEVICE_ID_ARTOP_ATP865) ||
+	    (dev->device == PCI_DEVICE_ID_ARTOP_ATP865R)) {
+		u8 reg49h = 0, reg4ah = 0;
+		/* Clear reset and test bits.  */
+		pci_read_config_byte(dev, 0x49, &reg49h);
+		pci_write_config_byte(dev, 0x49, reg49h & ~0x30);
+		/* Enable chip interrupt output.  */
+		pci_read_config_byte(dev, 0x4a, &reg4ah);
+		pci_write_config_byte(dev, 0x4a, reg4ah & ~0x01);
+		/* Enable burst mode. */
+		pci_read_config_byte(dev, 0x4a, &reg4ah);
+		pci_write_config_byte(dev, 0x4a, reg4ah | 0x80);
+	}
+
+	return 0;
+}
+
+static u8 atp86x_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 ata66 = 0, mask = hwif->channel ? 0x02 : 0x01;
+
+	pci_read_config_byte(dev, 0x49, &ata66);
+
+	return (ata66 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static const struct ide_port_ops atp850_port_ops = {
+	.set_pio_mode		= aec_set_pio_mode,
+	.set_dma_mode		= aec6210_set_mode,
+};
+
+static const struct ide_port_ops atp86x_port_ops = {
+	.set_pio_mode		= aec_set_pio_mode,
+	.set_dma_mode		= aec6260_set_mode,
+	.cable_detect		= atp86x_cable_detect,
+};
+
+static const struct ide_port_info aec62xx_chipsets[] = {
+	{	/* 0: AEC6210 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_aec62xx,
+		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
+		.port_ops	= &atp850_port_ops,
+		.host_flags	= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_ATAPI_DMA |
+				  IDE_HFLAG_NO_DSC |
+				  IDE_HFLAG_OFF_BOARD,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA2,
+	},
+	{	/* 1: AEC6260 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_aec62xx,
+		.port_ops	= &atp86x_port_ops,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA | IDE_HFLAG_NO_AUTODMA |
+				  IDE_HFLAG_OFF_BOARD,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA4,
+	},
+	{	/* 2: AEC6260R */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_aec62xx,
+		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
+		.port_ops	= &atp86x_port_ops,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA |
+				  IDE_HFLAG_NON_BOOTABLE,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA4,
+	},
+	{	/* 3: AEC6280 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_aec62xx,
+		.port_ops	= &atp86x_port_ops,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA |
+				  IDE_HFLAG_OFF_BOARD,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	},
+	{	/* 4: AEC6280R */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_aec62xx,
+		.enablebits	= {{0x4a,0x02,0x02}, {0x4a,0x04,0x04}},
+		.port_ops	= &atp86x_port_ops,
+		.host_flags	= IDE_HFLAG_NO_ATAPI_DMA |
+				  IDE_HFLAG_OFF_BOARD,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	}
+};
+
+/**
+ *	aec62xx_init_one	-	called when a AEC is found
+ *	@dev: the aec62xx device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ *
+ *	NOTE: since we're going to modify the 'name' field for AEC-6[26]80[R]
+ *	chips, pass a local copy of 'struct ide_port_info' down the call chain.
+ */
+
+static int aec62xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	const struct chipset_bus_clock_list_entry *bus_clock;
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+	int err;
+
+	if (bus_speed <= 33)
+		bus_clock = aec6xxx_33_base;
+	else
+		bus_clock = aec6xxx_34_base;
+
+	err = pci_enable_device(dev);
+	if (err)
+		return err;
+
+	d = aec62xx_chipsets[idx];
+
+	if (idx == 3 || idx == 4) {
+		unsigned long dma_base = pci_resource_start(dev, 4);
+
+		if (inb(dma_base + 2) & 0x10) {
+			printk(KERN_INFO DRV_NAME " %s: AEC6880%s card detected"
+				"\n", pci_name(dev), (idx == 4) ? "R" : "");
+			d.udma_mask = ATA_UDMA6;
+		}
+	}
+
+	err = ide_pci_init_one(dev, &d, (void *)bus_clock);
+	if (err)
+		pci_disable_device(dev);
+
+	return err;
+}
+
+static void aec62xx_remove(struct pci_dev *dev)
+{
+	ide_pci_remove(dev);
+	pci_disable_device(dev);
+}
+
+static const struct pci_device_id aec62xx_pci_tbl[] = {
+	{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP850UF), 0 },
+	{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP860),   1 },
+	{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP860R),  2 },
+	{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP865),   3 },
+	{ PCI_VDEVICE(ARTOP, PCI_DEVICE_ID_ARTOP_ATP865R),  4 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, aec62xx_pci_tbl);
+
+static struct pci_driver aec62xx_pci_driver = {
+	.name		= "AEC62xx_IDE",
+	.id_table	= aec62xx_pci_tbl,
+	.probe		= aec62xx_init_one,
+	.remove		= aec62xx_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init aec62xx_ide_init(void)
+{
+	return ide_pci_register_driver(&aec62xx_pci_driver);
+}
+
+static void __exit aec62xx_ide_exit(void)
+{
+	pci_unregister_driver(&aec62xx_pci_driver);
+}
+
+module_init(aec62xx_ide_init);
+module_exit(aec62xx_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for ARTOP AEC62xx IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ali14xx.c b/drivers/ide/ali14xx.c
new file mode 100644
index 000000000..3268931c2
--- /dev/null
+++ b/drivers/ide/ali14xx.c
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1996  Linus Torvalds & author (see below)
+ */
+
+/*
+ * ALI M14xx chipset EIDE controller
+ *
+ * Works for ALI M1439/1443/1445/1487/1489 chipsets.
+ *
+ * Adapted from code developed by derekn@vw.ece.cmu.edu.  -ml
+ * Derek's notes follow:
+ *
+ * I think the code should be pretty understandable,
+ * but I'll be happy to (try to) answer questions.
+ *
+ * The critical part is in the setupDrive function.  The initRegisters
+ * function doesn't seem to be necessary, but the DOS driver does it, so
+ * I threw it in.
+ *
+ * I've only tested this on my system, which only has one disk.  I posted
+ * it to comp.sys.linux.hardware, so maybe some other people will try it
+ * out.
+ *
+ * Derek Noonburg  (derekn@ece.cmu.edu)
+ * 95-sep-26
+ *
+ * Update 96-jul-13:
+ *
+ * I've since upgraded to two disks and a CD-ROM, with no trouble, and
+ * I've also heard from several others who have used it successfully.
+ * This driver appears to work with both the 1443/1445 and the 1487/1489
+ * chipsets.  I've added support for PIO mode 4 for the 1487.  This
+ * seems to work just fine on the 1443 also, although I'm not sure it's
+ * advertised as supporting mode 4.  (I've been running a WDC AC21200 in
+ * mode 4 for a while now with no trouble.)  -Derek
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "ali14xx"
+
+/* port addresses for auto-detection */
+#define ALI_NUM_PORTS 4
+static const int ports[ALI_NUM_PORTS] __initconst =
+	{ 0x074, 0x0f4, 0x034, 0x0e4 };
+
+/* register initialization data */
+typedef struct { u8 reg, data; } RegInitializer;
+
+static const RegInitializer initData[] __initconst = {
+	{0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00},
+	{0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f},
+	{0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
+	{0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00},
+	{0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00},
+	{0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff},
+	{0x35, 0x03}, {0x00, 0x00}
+};
+
+/* timing parameter registers for each drive */
+static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = {
+	{0x03, 0x26, 0x04, 0x27},     /* drive 0 */
+	{0x05, 0x28, 0x06, 0x29},     /* drive 1 */
+	{0x2b, 0x30, 0x2c, 0x31},     /* drive 2 */
+	{0x2d, 0x32, 0x2e, 0x33},     /* drive 3 */
+};
+
+static int basePort;	/* base port address */
+static int regPort;	/* port for register number */
+static int dataPort;	/* port for register data */
+static u8 regOn;	/* output to base port to access registers */
+static u8 regOff;	/* output to base port to close registers */
+
+/*------------------------------------------------------------------------*/
+
+/*
+ * Read a controller register.
+ */
+static inline u8 inReg(u8 reg)
+{
+	outb_p(reg, regPort);
+	return inb(dataPort);
+}
+
+/*
+ * Write a controller register.
+ */
+static void outReg(u8 data, u8 reg)
+{
+	outb_p(reg, regPort);
+	outb_p(data, dataPort);
+}
+
+static DEFINE_SPINLOCK(ali14xx_lock);
+
+/*
+ * Set PIO mode for the specified drive.
+ * This function computes timing parameters
+ * and sets controller registers accordingly.
+ */
+static void ali14xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	int driveNum;
+	int time1, time2;
+	u8 param1, param2, param3, param4;
+	unsigned long flags;
+	int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+
+	/* calculate timing, according to PIO mode */
+	time1 = ide_pio_cycle_time(drive, pio);
+	time2 = t->active;
+	param3 = param1 = (time2 * bus_speed + 999) / 1000;
+	param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1;
+	if (pio < 3) {
+		param3 += 8;
+		param4 += 8;
+	}
+	printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n",
+		drive->name, pio, time1, time2, param1, param2, param3, param4);
+
+	/* stuff timing parameters into controller registers */
+	driveNum = (drive->hwif->index << 1) + (drive->dn & 1);
+	spin_lock_irqsave(&ali14xx_lock, flags);
+	outb_p(regOn, basePort);
+	outReg(param1, regTab[driveNum].reg1);
+	outReg(param2, regTab[driveNum].reg2);
+	outReg(param3, regTab[driveNum].reg3);
+	outReg(param4, regTab[driveNum].reg4);
+	outb_p(regOff, basePort);
+	spin_unlock_irqrestore(&ali14xx_lock, flags);
+}
+
+/*
+ * Auto-detect the IDE controller port.
+ */
+static int __init findPort(void)
+{
+	int i;
+	u8 t;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	for (i = 0; i < ALI_NUM_PORTS; ++i) {
+		basePort = ports[i];
+		regOff = inb(basePort);
+		for (regOn = 0x30; regOn <= 0x33; ++regOn) {
+			outb_p(regOn, basePort);
+			if (inb(basePort) == regOn) {
+				regPort = basePort + 4;
+				dataPort = basePort + 8;
+				t = inReg(0) & 0xf0;
+				outb_p(regOff, basePort);
+				local_irq_restore(flags);
+				if (t != 0x50)
+					return 0;
+				return 1;  /* success */
+			}
+		}
+		outb_p(regOff, basePort);
+	}
+	local_irq_restore(flags);
+	return 0;
+}
+
+/*
+ * Initialize controller registers with default values.
+ */
+static int __init initRegisters(void)
+{
+	const RegInitializer *p;
+	u8 t;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	outb_p(regOn, basePort);
+	for (p = initData; p->reg != 0; ++p)
+		outReg(p->data, p->reg);
+	outb_p(0x01, regPort);
+	t = inb(regPort) & 0x01;
+	outb_p(regOff, basePort);
+	local_irq_restore(flags);
+	return t;
+}
+
+static const struct ide_port_ops ali14xx_port_ops = {
+	.set_pio_mode		= ali14xx_set_pio_mode,
+};
+
+static const struct ide_port_info ali14xx_port_info = {
+	.name			= DRV_NAME,
+	.chipset		= ide_ali14xx,
+	.port_ops		= &ali14xx_port_ops,
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.pio_mask		= ATA_PIO4,
+};
+
+static int __init ali14xx_probe(void)
+{
+	printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n",
+			  basePort, regOn);
+
+	/* initialize controller registers */
+	if (!initRegisters()) {
+		printk(KERN_ERR "ali14xx: Chip initialization failed.\n");
+		return 1;
+	}
+
+	return ide_legacy_device_add(&ali14xx_port_info, 0);
+}
+
+static bool probe_ali14xx;
+
+module_param_named(probe, probe_ali14xx, bool, 0);
+MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets");
+
+static int __init ali14xx_init(void)
+{
+	if (probe_ali14xx == 0)
+		goto out;
+
+	/* auto-detect IDE controller port */
+	if (findPort()) {
+		if (ali14xx_probe())
+			return -ENODEV;
+		return 0;
+	}
+	printk(KERN_ERR "ali14xx: not found.\n");
+out:
+	return -ENODEV;
+}
+
+module_init(ali14xx_init);
+
+MODULE_AUTHOR("see local file");
+MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
new file mode 100644
index 000000000..3265970ae
--- /dev/null
+++ b/drivers/ide/alim15x3.c
@@ -0,0 +1,602 @@
+/*
+ *  Copyright (C) 1998-2000 Michel Aubry, Maintainer
+ *  Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
+ *  Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
+ *
+ *  Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
+ *  May be copied or modified under the terms of the GNU General Public License
+ *  Copyright (C) 2002 Alan Cox
+ *  ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
+ *  Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
+ *  Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
+ *
+ *  (U)DMA capable version of ali 1533/1543(C), 1535(D)
+ *
+ **********************************************************************
+ *  9/7/99 --Parts from the above author are included and need to be
+ *  converted into standard interface, once I finish the thought.
+ *
+ *  Recent changes
+ *	Don't use LBA48 mode on ALi <= 0xC4
+ *	Don't poke 0x79 with a non ALi northbridge
+ *	Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
+ *	Allow UDMA6 on revisions > 0xC4
+ *
+ *  Documentation
+ *	Chipset documentation available under NDA only
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/dmi.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "alim15x3"
+
+/*
+ *	ALi devices are not plug in. Otherwise these static values would
+ *	need to go. They ought to go away anyway
+ */
+ 
+static u8 m5229_revision;
+static u8 chip_is_1543c_e;
+static struct pci_dev *isa_dev;
+
+static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	int pio_fifo = 0x54 + hwif->channel;
+	u8 fifo;
+	int shift = 4 * (drive->dn & 1);
+
+	pci_read_config_byte(pdev, pio_fifo, &fifo);
+	fifo &= ~(0x0F << shift);
+	fifo |= (on << shift);
+	pci_write_config_byte(pdev, pio_fifo, fifo);
+}
+
+static void ali_program_timings(ide_hwif_t *hwif, ide_drive_t *drive,
+				struct ide_timing *t, u8 ultra)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	int port = hwif->channel ? 0x5c : 0x58;
+	int udmat = 0x56 + hwif->channel;
+	u8 unit = drive->dn & 1, udma;
+	int shift = 4 * unit;
+
+	/* Set up the UDMA */
+	pci_read_config_byte(dev, udmat, &udma);
+	udma &= ~(0x0F << shift);
+	udma |= ultra << shift;
+	pci_write_config_byte(dev, udmat, udma);
+
+	if (t == NULL)
+		return;
+
+	t->setup = clamp_val(t->setup, 1, 8) & 7;
+	t->act8b = clamp_val(t->act8b, 1, 8) & 7;
+	t->rec8b = clamp_val(t->rec8b, 1, 16) & 15;
+	t->active = clamp_val(t->active, 1, 8) & 7;
+	t->recover = clamp_val(t->recover, 1, 16) & 15;
+
+	pci_write_config_byte(dev, port, t->setup);
+	pci_write_config_byte(dev, port + 1, (t->act8b << 4) | t->rec8b);
+	pci_write_config_byte(dev, port + unit + 2,
+			      (t->active << 4) | t->recover);
+}
+
+/**
+ *	ali_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Program the controller for the given PIO mode.
+ */
+
+static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+	unsigned long T =  1000000 / bus_speed; /* PCI clock based */
+	struct ide_timing t;
+
+	ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
+	if (pair) {
+		struct ide_timing p;
+
+		ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
+		ide_timing_merge(&p, &t, &t,
+			IDE_TIMING_SETUP | IDE_TIMING_8BIT);
+		if (pair->dma_mode) {
+			ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
+			ide_timing_merge(&p, &t, &t,
+				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
+		}
+	}
+
+	/* 
+	 * PIO mode => ATA FIFO on, ATAPI FIFO off
+	 */
+	ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);
+
+	ali_program_timings(hwif, drive, &t, 0);
+}
+
+/**
+ *	ali_udma_filter		-	compute UDMA mask
+ *	@drive: IDE device
+ *
+ *	Return available UDMA modes.
+ *
+ *	The actual rules for the ALi are:
+ *		No UDMA on revisions <= 0x20
+ *		Disk only for revisions < 0xC2
+ *		Not WDC drives on M1543C-E (?)
+ */
+
+static u8 ali_udma_filter(ide_drive_t *drive)
+{
+	if (m5229_revision > 0x20 && m5229_revision < 0xC2) {
+		if (drive->media != ide_disk)
+			return 0;
+		if (chip_is_1543c_e &&
+		    strstr((char *)&drive->id[ATA_ID_PROD], "WDC "))
+			return 0;
+	}
+
+	return drive->hwif->ultra_mask;
+}
+
+/**
+ *	ali_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Configure the hardware for the desired IDE transfer mode.
+ */
+
+static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	ide_drive_t *pair	= ide_get_pair_dev(drive);
+	int bus_speed		= ide_pci_clk ? ide_pci_clk : 33;
+	unsigned long T		=  1000000 / bus_speed; /* PCI clock based */
+	const u8 speed		= drive->dma_mode;
+	u8 tmpbyte		= 0x00;
+	struct ide_timing t;
+
+	if (speed < XFER_UDMA_0) {
+		ide_timing_compute(drive, drive->dma_mode, &t, T, 1);
+		if (pair) {
+			struct ide_timing p;
+
+			ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
+			ide_timing_merge(&p, &t, &t,
+				IDE_TIMING_SETUP | IDE_TIMING_8BIT);
+			if (pair->dma_mode) {
+				ide_timing_compute(pair, pair->dma_mode,
+						&p, T, 1);
+				ide_timing_merge(&p, &t, &t,
+					IDE_TIMING_SETUP | IDE_TIMING_8BIT);
+			}
+		}
+		ali_program_timings(hwif, drive, &t, 0);
+	} else {
+		ali_program_timings(hwif, drive, NULL,
+				udma_timing[speed - XFER_UDMA_0]);
+		if (speed >= XFER_UDMA_3) {
+			pci_read_config_byte(dev, 0x4b, &tmpbyte);
+			tmpbyte |= 1;
+			pci_write_config_byte(dev, 0x4b, tmpbyte);
+		}
+	}
+}
+
+/**
+ *	ali_dma_check	-	DMA check
+ *	@drive:	target device
+ *	@cmd: command
+ *
+ *	Returns 1 if the DMA cannot be performed, zero on success.
+ */
+
+static int ali_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	if (m5229_revision < 0xC2 && drive->media != ide_disk) {
+		if (cmd->tf_flags & IDE_TFLAG_WRITE)
+			return 1;	/* try PIO instead of DMA */
+	}
+	return 0;
+}
+
+/**
+ *	init_chipset_ali15x3	-	Initialise an ALi IDE controller
+ *	@dev: PCI device
+ *
+ *	This function initializes the ALI IDE controller and where 
+ *	appropriate also sets up the 1533 southbridge.
+ */
+
+static int init_chipset_ali15x3(struct pci_dev *dev)
+{
+	unsigned long flags;
+	u8 tmpbyte;
+	struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));
+
+	m5229_revision = dev->revision;
+
+	isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
+
+	local_irq_save(flags);
+
+	if (m5229_revision < 0xC2) {
+		/*
+		 * revision 0x20 (1543-E, 1543-F)
+		 * revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
+		 * clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
+		 */
+		pci_read_config_byte(dev, 0x4b, &tmpbyte);
+		/*
+		 * clear bit 7
+		 */
+		pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
+		/*
+		 * check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
+		 */
+		if (m5229_revision >= 0x20 && isa_dev) {
+			pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
+			chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
+		}
+		goto out;
+	}
+
+	/*
+	 * 1543C-B?, 1535, 1535D, 1553
+	 * Note 1: not all "motherboard" support this detection
+	 * Note 2: if no udma 66 device, the detection may "error".
+	 *         but in this case, we will not set the device to
+	 *         ultra 66, the detection result is not important
+	 */
+
+	/*
+	 * enable "Cable Detection", m5229, 0x4b, bit3
+	 */
+	pci_read_config_byte(dev, 0x4b, &tmpbyte);
+	pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
+
+	/*
+	 * We should only tune the 1533 enable if we are using an ALi
+	 * North bridge. We might have no north found on some zany
+	 * box without a device at 0:0.0. The ALi bridge will be at
+	 * 0:0.0 so if we didn't find one we know what is cooking.
+	 */
+	if (north && north->vendor != PCI_VENDOR_ID_AL)
+		goto out;
+
+	if (m5229_revision < 0xC5 && isa_dev)
+	{	
+		/*
+		 * set south-bridge's enable bit, m1533, 0x79
+		 */
+
+		pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
+		if (m5229_revision == 0xC2) {
+			/*
+			 * 1543C-B0 (m1533, 0x79, bit 2)
+			 */
+			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
+		} else if (m5229_revision >= 0xC3) {
+			/*
+			 * 1553/1535 (m1533, 0x79, bit 1)
+			 */
+			pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
+		}
+	}
+
+out:
+	/*
+	 * CD_ROM DMA on (m5229, 0x53, bit0)
+	 *      Enable this bit even if we want to use PIO.
+	 * PIO FIFO off (m5229, 0x53, bit1)
+	 *      The hardware will use 0x54h and 0x55h to control PIO FIFO.
+	 *	(Not on later devices it seems)
+	 *
+	 *	0x53 changes meaning on later revs - we must no touch
+	 *	bit 1 on them.  Need to check if 0x20 is the right break.
+	 */
+	if (m5229_revision >= 0x20) {
+		pci_read_config_byte(dev, 0x53, &tmpbyte);
+
+		if (m5229_revision <= 0x20)
+			tmpbyte = (tmpbyte & (~0x02)) | 0x01;
+		else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
+			tmpbyte |= 0x03;
+		else
+			tmpbyte |= 0x01;
+
+		pci_write_config_byte(dev, 0x53, tmpbyte);
+	}
+	local_irq_restore(flags);
+	pci_dev_put(north);
+	pci_dev_put(isa_dev);
+	return 0;
+}
+
+/*
+ *	Cable special cases
+ */
+
+static const struct dmi_system_id cable_dmi_table[] = {
+	{
+		.ident = "HP Pavilion N5430",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+			DMI_MATCH(DMI_BOARD_VERSION, "OmniBook N32N-736"),
+		},
+	},
+	{
+		.ident = "Toshiba Satellite S1800-814",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "S1800-814"),
+		},
+	},
+	{ }
+};
+
+static int ali_cable_override(struct pci_dev *pdev)
+{
+	/* Fujitsu P2000 */
+	if (pdev->subsystem_vendor == 0x10CF &&
+	    pdev->subsystem_device == 0x10AF)
+		return 1;
+
+	/* Mitac 8317 (Winbook-A) and relatives */
+	if (pdev->subsystem_vendor == 0x1071 &&
+	    pdev->subsystem_device == 0x8317)
+		return 1;
+
+	/* Systems by DMI */
+	if (dmi_check_system(cable_dmi_table))
+		return 1;
+
+	return 0;
+}
+
+/**
+ *	ali_cable_detect	-	cable detection
+ *	@hwif: IDE interface
+ *
+ *	This checks if the controller and the cable are capable
+ *	of UDMA66 transfers. It doesn't check the drives.
+ */
+
+static u8 ali_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 cbl = ATA_CBL_PATA40, tmpbyte;
+
+	if (m5229_revision >= 0xC2) {
+		/*
+		 * m5229 80-pin cable detection (from Host View)
+		 *
+		 * 0x4a bit0 is 0 => primary channel has 80-pin
+		 * 0x4a bit1 is 0 => secondary channel has 80-pin
+		 *
+		 * Certain laptops use short but suitable cables
+		 * and don't implement the detect logic.
+		 */
+		if (ali_cable_override(dev))
+			cbl = ATA_CBL_PATA40_SHORT;
+		else {
+			pci_read_config_byte(dev, 0x4a, &tmpbyte);
+			if ((tmpbyte & (1 << hwif->channel)) == 0)
+				cbl = ATA_CBL_PATA80;
+		}
+	}
+
+	return cbl;
+}
+
+#ifndef CONFIG_SPARC64
+/**
+ *	init_hwif_ali15x3	-	Initialize the ALI IDE x86 stuff
+ *	@hwif: interface to configure
+ *
+ *	Obtain the IRQ tables for an ALi based IDE solution on the PC
+ *	class platforms. This part of the code isn't applicable to the
+ *	Sparc systems.
+ */
+
+static void init_hwif_ali15x3(ide_hwif_t *hwif)
+{
+	u8 ideic, inmir;
+	s8 irq_routing_table[] = { -1,  9, 3, 10, 4,  5, 7,  6,
+				      1, 11, 0, 12, 0, 14, 0, 15 };
+	int irq = -1;
+
+	if (isa_dev) {
+		/*
+		 * read IDE interface control
+		 */
+		pci_read_config_byte(isa_dev, 0x58, &ideic);
+
+		/* bit0, bit1 */
+		ideic = ideic & 0x03;
+
+		/* get IRQ for IDE Controller */
+		if ((hwif->channel && ideic == 0x03) ||
+		    (!hwif->channel && !ideic)) {
+			/*
+			 * get SIRQ1 routing table
+			 */
+			pci_read_config_byte(isa_dev, 0x44, &inmir);
+			inmir = inmir & 0x0f;
+			irq = irq_routing_table[inmir];
+		} else if (hwif->channel && !(ideic & 0x01)) {
+			/*
+			 * get SIRQ2 routing table
+			 */
+			pci_read_config_byte(isa_dev, 0x75, &inmir);
+			inmir = inmir & 0x0f;
+			irq = irq_routing_table[inmir];
+		}
+		if(irq >= 0)
+			hwif->irq = irq;
+	}
+}
+#else
+#define init_hwif_ali15x3 NULL
+#endif /* CONFIG_SPARC64 */
+
+/**
+ *	init_dma_ali15x3	-	set up DMA on ALi15x3
+ *	@hwif: IDE interface
+ *	@d: IDE port info
+ *
+ *	Set up the DMA functionality on the ALi 15x3.
+ */
+
+static int init_dma_ali15x3(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long base = ide_pci_dma_base(hwif, d);
+
+	if (base == 0)
+		return -1;
+
+	hwif->dma_base = base;
+
+	if (ide_pci_check_simplex(hwif, d) < 0)
+		return -1;
+
+	if (ide_pci_set_master(dev, d->name) < 0)
+		return -1;
+
+	if (!hwif->channel)
+		outb(inb(base + 2) & 0x60, base + 2);
+
+	printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
+			 hwif->name, base, base + 7);
+
+	if (ide_allocate_dma_engine(hwif))
+		return -1;
+
+	return 0;
+}
+
+static const struct ide_port_ops ali_port_ops = {
+	.set_pio_mode		= ali_set_pio_mode,
+	.set_dma_mode		= ali_set_dma_mode,
+	.udma_filter		= ali_udma_filter,
+	.cable_detect		= ali_cable_detect,
+};
+
+static const struct ide_dma_ops ali_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= ide_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_check		= ali_dma_check,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info ali15x3_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_ali15x3,
+	.init_hwif	= init_hwif_ali15x3,
+	.init_dma	= init_dma_ali15x3,
+	.port_ops	= &ali_port_ops,
+	.dma_ops	= &sff_dma_ops,
+	.pio_mask	= ATA_PIO5,
+	.swdma_mask	= ATA_SWDMA2,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+/**
+ *	alim15x3_init_one	-	set up an ALi15x3 IDE controller
+ *	@dev: PCI device to set up
+ *
+ *	Perform the actual set up for an ALi15x3 that has been found by the
+ *	hot plug layer.
+ */
+ 
+static int alim15x3_init_one(struct pci_dev *dev,
+			     const struct pci_device_id *id)
+{
+	struct ide_port_info d = ali15x3_chipset;
+	u8 rev = dev->revision, idx = id->driver_data;
+
+	/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
+	if (rev <= 0xC4)
+		d.host_flags |= IDE_HFLAG_NO_LBA48_DMA;
+
+	if (rev >= 0x20) {
+		if (rev == 0x20)
+			d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
+
+		if (rev < 0xC2)
+			d.udma_mask = ATA_UDMA2;
+		else if (rev == 0xC2 || rev == 0xC3)
+			d.udma_mask = ATA_UDMA4;
+		else if (rev == 0xC4)
+			d.udma_mask = ATA_UDMA5;
+		else
+			d.udma_mask = ATA_UDMA6;
+
+		d.dma_ops = &ali_dma_ops;
+	} else {
+		d.host_flags |= IDE_HFLAG_NO_DMA;
+
+		d.mwdma_mask = d.swdma_mask = 0;
+	}
+
+	if (idx == 0)
+		d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+
+static const struct pci_device_id alim15x3_pci_tbl[] = {
+	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), 0 },
+	{ PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), 1 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
+
+static struct pci_driver alim15x3_pci_driver = {
+	.name		= "ALI15x3_IDE",
+	.id_table	= alim15x3_pci_tbl,
+	.probe		= alim15x3_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init ali15x3_ide_init(void)
+{
+	return ide_pci_register_driver(&alim15x3_pci_driver);
+}
+
+static void __exit ali15x3_ide_exit(void)
+{
+	pci_unregister_driver(&alim15x3_pci_driver);
+}
+
+module_init(ali15x3_ide_init);
+module_exit(ali15x3_ide_exit);
+
+MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/amd74xx.c b/drivers/ide/amd74xx.c
new file mode 100644
index 000000000..7340597a3
--- /dev/null
+++ b/drivers/ide/amd74xx.c
@@ -0,0 +1,343 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
+ * IDE driver for Linux.
+ *
+ * Copyright (c) 2000-2002 Vojtech Pavlik
+ * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
+ *
+ * Based on the work of:
+ *      Andre Hedrick
+ */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#define DRV_NAME "amd74xx"
+
+enum {
+	AMD_IDE_CONFIG		= 0x41,
+	AMD_CABLE_DETECT	= 0x42,
+	AMD_DRIVE_TIMING	= 0x48,
+	AMD_8BIT_TIMING		= 0x4e,
+	AMD_ADDRESS_SETUP	= 0x4c,
+	AMD_UDMA_TIMING		= 0x50,
+};
+
+static unsigned int amd_80w;
+static unsigned int amd_clock;
+
+static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
+static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };
+
+static inline u8 amd_offset(struct pci_dev *dev)
+{
+	return (dev->vendor == PCI_VENDOR_ID_NVIDIA) ? 0x10 : 0;
+}
+
+/*
+ * amd_set_speed() writes timing values to the chipset registers
+ */
+
+static void amd_set_speed(struct pci_dev *dev, u8 dn, u8 udma_mask,
+			  struct ide_timing *timing)
+{
+	u8 t = 0, offset = amd_offset(dev);
+
+	pci_read_config_byte(dev, AMD_ADDRESS_SETUP + offset, &t);
+	t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
+	pci_write_config_byte(dev, AMD_ADDRESS_SETUP + offset, t);
+
+	pci_write_config_byte(dev, AMD_8BIT_TIMING + offset + (1 - (dn >> 1)),
+		((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
+
+	pci_write_config_byte(dev, AMD_DRIVE_TIMING + offset + (3 - dn),
+		((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
+
+	switch (udma_mask) {
+	case ATA_UDMA2: t = timing->udma ? (0xc0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
+	case ATA_UDMA4: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 2, 10)]) : 0x03; break;
+	case ATA_UDMA5: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 10)]) : 0x03; break;
+	case ATA_UDMA6: t = timing->udma ? (0xc0 | amd_cyc2udma[clamp_val(timing->udma, 1, 15)]) : 0x03; break;
+	default: return;
+	}
+
+	if (timing->udma)
+		pci_write_config_byte(dev, AMD_UDMA_TIMING + offset + 3 - dn, t);
+}
+
+/*
+ * amd_set_drive() computes timing values and configures the chipset
+ * to a desired transfer mode.  It also can be called by upper layers.
+ */
+
+static void amd_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	ide_drive_t *peer = ide_get_pair_dev(drive);
+	struct ide_timing t, p;
+	int T, UT;
+	u8 udma_mask = hwif->ultra_mask;
+	const u8 speed = drive->dma_mode;
+
+	T = 1000000000 / amd_clock;
+	UT = (udma_mask == ATA_UDMA2) ? T : (T / 2);
+
+	ide_timing_compute(drive, speed, &t, T, UT);
+
+	if (peer) {
+		ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
+		ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
+	}
+
+	if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
+	if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;
+
+	amd_set_speed(dev, drive->dn, udma_mask, &t);
+}
+
+/*
+ * amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
+ */
+
+static void amd_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	amd_set_drive(hwif, drive);
+}
+
+static void amd7409_cable_detect(struct pci_dev *dev)
+{
+	/* no host side cable detection */
+	amd_80w = 0x03;
+}
+
+static void amd7411_cable_detect(struct pci_dev *dev)
+{
+	int i;
+	u32 u = 0;
+	u8 t = 0, offset = amd_offset(dev);
+
+	pci_read_config_byte(dev, AMD_CABLE_DETECT + offset, &t);
+	pci_read_config_dword(dev, AMD_UDMA_TIMING + offset, &u);
+	amd_80w = ((t & 0x3) ? 1 : 0) | ((t & 0xc) ? 2 : 0);
+	for (i = 24; i >= 0; i -= 8)
+		if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
+			printk(KERN_WARNING DRV_NAME " %s: BIOS didn't set "
+				"cable bits correctly. Enabling workaround.\n",
+				pci_name(dev));
+			amd_80w |= (1 << (1 - (i >> 4)));
+		}
+}
+
+/*
+ * The initialization callback.  Initialize drive independent registers.
+ */
+
+static int init_chipset_amd74xx(struct pci_dev *dev)
+{
+	u8 t = 0, offset = amd_offset(dev);
+
+/*
+ * Check 80-wire cable presence.
+ */
+
+	if (dev->vendor == PCI_VENDOR_ID_AMD &&
+	    dev->device == PCI_DEVICE_ID_AMD_COBRA_7401)
+		; /* no UDMA > 2 */
+	else if (dev->vendor == PCI_VENDOR_ID_AMD &&
+		 dev->device == PCI_DEVICE_ID_AMD_VIPER_7409)
+		amd7409_cable_detect(dev);
+	else
+		amd7411_cable_detect(dev);
+
+/*
+ * Take care of prefetch & postwrite.
+ */
+
+	pci_read_config_byte(dev, AMD_IDE_CONFIG + offset, &t);
+	/*
+	 * Check for broken FIFO support.
+	 */
+	if (dev->vendor == PCI_VENDOR_ID_AMD &&
+	    dev->device == PCI_DEVICE_ID_AMD_VIPER_7411)
+		t &= 0x0f;
+	else
+		t |= 0xf0;
+	pci_write_config_byte(dev, AMD_IDE_CONFIG + offset, t);
+
+	return 0;
+}
+
+static u8 amd_cable_detect(ide_hwif_t *hwif)
+{
+	if ((amd_80w >> hwif->channel) & 1)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops amd_port_ops = {
+	.set_pio_mode		= amd_set_pio_mode,
+	.set_dma_mode		= amd_set_drive,
+	.cable_detect		= amd_cable_detect,
+};
+
+#define IDE_HFLAGS_AMD \
+	(IDE_HFLAG_PIO_NO_BLACKLIST | \
+	 IDE_HFLAG_POST_SET_MODE | \
+	 IDE_HFLAG_IO_32BIT | \
+	 IDE_HFLAG_UNMASK_IRQS)
+
+#define DECLARE_AMD_DEV(swdma, udma)				\
+	{								\
+		.name		= DRV_NAME,				\
+		.init_chipset	= init_chipset_amd74xx,			\
+		.enablebits	= {{0x40,0x02,0x02}, {0x40,0x01,0x01}},	\
+		.port_ops	= &amd_port_ops,			\
+		.host_flags	= IDE_HFLAGS_AMD,			\
+		.pio_mask	= ATA_PIO5,				\
+		.swdma_mask	= swdma,				\
+		.mwdma_mask	= ATA_MWDMA2,				\
+		.udma_mask	= udma,					\
+	}
+
+#define DECLARE_NV_DEV(udma)					\
+	{								\
+		.name		= DRV_NAME,				\
+		.init_chipset	= init_chipset_amd74xx,			\
+		.enablebits	= {{0x50,0x02,0x02}, {0x50,0x01,0x01}},	\
+		.port_ops	= &amd_port_ops,			\
+		.host_flags	= IDE_HFLAGS_AMD,			\
+		.pio_mask	= ATA_PIO5,				\
+		.swdma_mask	= ATA_SWDMA2,				\
+		.mwdma_mask	= ATA_MWDMA2,				\
+		.udma_mask	= udma,					\
+	}
+
+static const struct ide_port_info amd74xx_chipsets[] = {
+	/* 0: AMD7401 */	DECLARE_AMD_DEV(0x00, ATA_UDMA2),
+	/* 1: AMD7409 */	DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA4),
+	/* 2: AMD7411/7441 */	DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
+	/* 3: AMD8111 */	DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA6),
+
+	/* 4: NFORCE */		DECLARE_NV_DEV(ATA_UDMA5),
+	/* 5: >= NFORCE2 */	DECLARE_NV_DEV(ATA_UDMA6),
+
+	/* 6: AMD5536 */	DECLARE_AMD_DEV(ATA_SWDMA2, ATA_UDMA5),
+};
+
+static int amd74xx_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+
+	d = amd74xx_chipsets[idx];
+
+	/*
+	 * Check for bad SWDMA and incorrectly wired Serenade mainboards.
+	 */
+	if (idx == 1) {
+		if (dev->revision <= 7)
+			d.swdma_mask = 0;
+		d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
+	} else if (idx == 3) {
+		if (dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
+		    dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
+			d.udma_mask = ATA_UDMA5;
+	}
+
+	/*
+	 * It seems that on some nVidia controllers using AltStatus
+	 * register can be unreliable so default to Status register
+	 * if the device is in Compatibility Mode.
+	 */
+	if (dev->vendor == PCI_VENDOR_ID_NVIDIA &&
+	    ide_pci_is_in_compatibility_mode(dev))
+		d.host_flags |= IDE_HFLAG_BROKEN_ALTSTATUS;
+
+	printk(KERN_INFO "%s %s: UDMA%s controller\n",
+		d.name, pci_name(dev), amd_dma[fls(d.udma_mask) - 1]);
+
+	/*
+	* Determine the system bus clock.
+	*/
+	amd_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
+
+	switch (amd_clock) {
+	case 33000: amd_clock = 33333; break;
+	case 37000: amd_clock = 37500; break;
+	case 41000: amd_clock = 41666; break;
+	}
+
+	if (amd_clock < 20000 || amd_clock > 50000) {
+		printk(KERN_WARNING "%s: User given PCI clock speed impossible"
+				    " (%d), using 33 MHz instead.\n",
+				    d.name, amd_clock);
+		amd_clock = 33333;
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id amd74xx_pci_tbl[] = {
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_COBRA_7401),		 0 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_VIPER_7409),		 1 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_VIPER_7411),		 2 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_OPUS_7441),		 2 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_8111_IDE),		 3 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_IDE),	 4 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE),	 5 },
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA),	 5 },
+#endif
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE),	 5 },
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2),	 5 },
+#endif
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE),	 5 },
+	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE),	 5 },
+	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_IDE),		 6 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);
+
+static struct pci_driver amd74xx_pci_driver = {
+	.name		= "AMD_IDE",
+	.id_table	= amd74xx_pci_tbl,
+	.probe		= amd74xx_probe,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init amd74xx_ide_init(void)
+{
+	return ide_pci_register_driver(&amd74xx_pci_driver);
+}
+
+static void __exit amd74xx_ide_exit(void)
+{
+	pci_unregister_driver(&amd74xx_pci_driver);
+}
+
+module_init(amd74xx_ide_init);
+module_exit(amd74xx_ide_exit);
+
+MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("AMD PCI IDE driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c
new file mode 100644
index 000000000..e08b0aac0
--- /dev/null
+++ b/drivers/ide/atiixp.c
@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
+ *  Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "atiixp"
+
+#define ATIIXP_IDE_PIO_TIMING		0x40
+#define ATIIXP_IDE_MDMA_TIMING		0x44
+#define ATIIXP_IDE_PIO_CONTROL		0x48
+#define ATIIXP_IDE_PIO_MODE		0x4a
+#define ATIIXP_IDE_UDMA_CONTROL		0x54
+#define ATIIXP_IDE_UDMA_MODE		0x56
+
+struct atiixp_ide_timing {
+	u8 command_width;
+	u8 recover_width;
+};
+
+static struct atiixp_ide_timing pio_timing[] = {
+	{ 0x05, 0x0d },
+	{ 0x04, 0x07 },
+	{ 0x03, 0x04 },
+	{ 0x02, 0x02 },
+	{ 0x02, 0x00 },
+};
+
+static struct atiixp_ide_timing mdma_timing[] = {
+	{ 0x07, 0x07 },
+	{ 0x02, 0x01 },
+	{ 0x02, 0x00 },
+};
+
+static DEFINE_SPINLOCK(atiixp_lock);
+
+/**
+ *	atiixp_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Set the interface PIO mode.
+ */
+
+static void atiixp_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long flags;
+	int timing_shift = (drive->dn ^ 1) * 8;
+	u32 pio_timing_data;
+	u16 pio_mode_data;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	spin_lock_irqsave(&atiixp_lock, flags);
+
+	pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
+	pio_mode_data &= ~(0x07 << (drive->dn * 4));
+	pio_mode_data |= (pio << (drive->dn * 4));
+	pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
+
+	pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
+	pio_timing_data &= ~(0xff << timing_shift);
+	pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) |
+		 (pio_timing[pio].command_width << (timing_shift + 4));
+	pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
+
+	spin_unlock_irqrestore(&atiixp_lock, flags);
+}
+
+/**
+ *	atiixp_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Set a ATIIXP host controller to the desired DMA mode.  This involves
+ *	programming the right timing data into the PCI configuration space.
+ */
+
+static void atiixp_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long flags;
+	int timing_shift = (drive->dn ^ 1) * 8;
+	u32 tmp32;
+	u16 tmp16;
+	u16 udma_ctl = 0;
+	const u8 speed = drive->dma_mode;
+
+	spin_lock_irqsave(&atiixp_lock, flags);
+
+	pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &udma_ctl);
+
+	if (speed >= XFER_UDMA_0) {
+		pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16);
+		tmp16 &= ~(0x07 << (drive->dn * 4));
+		tmp16 |= ((speed & 0x07) << (drive->dn * 4));
+		pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16);
+
+		udma_ctl |= (1 << drive->dn);
+	} else if (speed >= XFER_MW_DMA_0) {
+		u8 i = speed & 0x03;
+
+		pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32);
+		tmp32 &= ~(0xff << timing_shift);
+		tmp32 |= (mdma_timing[i].recover_width << timing_shift) |
+			 (mdma_timing[i].command_width << (timing_shift + 4));
+		pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32);
+
+		udma_ctl &= ~(1 << drive->dn);
+	}
+
+	pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, udma_ctl);
+
+	spin_unlock_irqrestore(&atiixp_lock, flags);
+}
+
+static u8 atiixp_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	u8 udma_mode = 0, ch = hwif->channel;
+
+	pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
+
+	if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops atiixp_port_ops = {
+	.set_pio_mode		= atiixp_set_pio_mode,
+	.set_dma_mode		= atiixp_set_dma_mode,
+	.cable_detect		= atiixp_cable_detect,
+};
+
+static const struct ide_port_info atiixp_pci_info[] = {
+	{	/* 0: IXP200/300/400/700 */
+		.name		= DRV_NAME,
+		.enablebits	= {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
+		.port_ops	= &atiixp_port_ops,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	},
+	{	/* 1: IXP600 */
+		.name		= DRV_NAME,
+		.enablebits	= {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
+		.port_ops	= &atiixp_port_ops,
+		.host_flags	= IDE_HFLAG_SINGLE,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+ 	},
+};
+
+/**
+ *	atiixp_init_one	-	called when a ATIIXP is found
+ *	@dev: the atiixp device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+
+static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &atiixp_pci_info[id->driver_data], NULL);
+}
+
+static const struct pci_device_id atiixp_pci_tbl[] = {
+	{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 },
+	{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 },
+	{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 },
+	{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 },
+	{ PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 },
+	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
+
+static struct pci_driver atiixp_pci_driver = {
+	.name		= "ATIIXP_IDE",
+	.id_table	= atiixp_pci_tbl,
+	.probe		= atiixp_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init atiixp_ide_init(void)
+{
+	return ide_pci_register_driver(&atiixp_pci_driver);
+}
+
+static void __exit atiixp_ide_exit(void)
+{
+	pci_unregister_driver(&atiixp_pci_driver);
+}
+
+module_init(atiixp_ide_init);
+module_exit(atiixp_ide_exit);
+
+MODULE_AUTHOR("HUI YU");
+MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/buddha.c b/drivers/ide/buddha.c
new file mode 100644
index 000000000..46eaf58d8
--- /dev/null
+++ b/drivers/ide/buddha.c
@@ -0,0 +1,238 @@
+/*
+ *  Amiga Buddha, Catweasel and X-Surf IDE Driver
+ *
+ *	Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
+ *
+ *  This driver was written based on the specifications in README.buddha and
+ *  the X-Surf info from Inside_XSurf.txt available at
+ *  http://www.jschoenfeld.com
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ *
+ *  TODO:
+ *    - test it :-)
+ *    - tune the timings using the speed-register
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/zorro.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+
+
+    /*
+     *  The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
+     */
+
+#define BUDDHA_NUM_HWIFS	2
+#define CATWEASEL_NUM_HWIFS	3
+#define XSURF_NUM_HWIFS         2
+
+#define MAX_NUM_HWIFS		3
+
+    /*
+     *  Bases of the IDE interfaces (relative to the board address)
+     */
+
+#define BUDDHA_BASE1	0x800
+#define BUDDHA_BASE2	0xa00
+#define BUDDHA_BASE3	0xc00
+
+#define XSURF_BASE1     0xb000 /* 2.5" Interface */
+#define XSURF_BASE2     0xd000 /* 3.5" Interface */
+
+static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
+    BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
+};
+
+static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
+     XSURF_BASE1, XSURF_BASE2
+};
+
+    /*
+     *  Offsets from one of the above bases
+     */
+
+#define BUDDHA_CONTROL	0x11a
+
+    /*
+     *  Other registers
+     */
+
+#define BUDDHA_IRQ1	0xf00		/* MSB = 1, Harddisk is source of */
+#define BUDDHA_IRQ2	0xf40		/* interrupt */
+#define BUDDHA_IRQ3	0xf80
+
+#define XSURF_IRQ1      0x7e
+#define XSURF_IRQ2      0x7e
+
+static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
+    BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
+};
+
+static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
+    XSURF_IRQ1, XSURF_IRQ2
+};
+
+#define BUDDHA_IRQ_MR	0xfc0		/* master interrupt enable */
+
+
+    /*
+     *  Board information
+     */
+
+typedef enum BuddhaType_Enum {
+    BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
+} BuddhaType;
+
+static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
+
+    /*
+     *  Check and acknowledge the interrupt status
+     */
+
+static int buddha_test_irq(ide_hwif_t *hwif)
+{
+    unsigned char ch;
+
+    ch = z_readb(hwif->io_ports.irq_addr);
+    if (!(ch & 0x80))
+	    return 0;
+    return 1;
+}
+
+static void xsurf_clear_irq(ide_drive_t *drive)
+{
+    /*
+     * X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0
+     */
+    z_writeb(0, drive->hwif->io_ports.irq_addr);
+}
+
+static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base,
+				      unsigned long ctl, unsigned long irq_port)
+{
+	int i;
+
+	memset(hw, 0, sizeof(*hw));
+
+	hw->io_ports.data_addr = base;
+
+	for (i = 1; i < 8; i++)
+		hw->io_ports_array[i] = base + 2 + i * 4;
+
+	hw->io_ports.ctl_addr = ctl;
+	hw->io_ports.irq_addr = irq_port;
+
+	hw->irq = IRQ_AMIGA_PORTS;
+}
+
+static const struct ide_port_ops buddha_port_ops = {
+	.test_irq		= buddha_test_irq,
+};
+
+static const struct ide_port_ops xsurf_port_ops = {
+	.clear_irq		= xsurf_clear_irq,
+	.test_irq		= buddha_test_irq,
+};
+
+static const struct ide_port_info buddha_port_info = {
+	.port_ops		= &buddha_port_ops,
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+    /*
+     *  Probe for a Buddha or Catweasel IDE interface
+     */
+
+static int __init buddha_init(void)
+{
+	struct zorro_dev *z = NULL;
+	u_long buddha_board = 0;
+	BuddhaType type;
+	int buddha_num_hwifs, i;
+
+	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
+		unsigned long board;
+		struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS];
+		struct ide_port_info d = buddha_port_info;
+
+		if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
+			buddha_num_hwifs = BUDDHA_NUM_HWIFS;
+			type=BOARD_BUDDHA;
+		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
+			buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
+			type=BOARD_CATWEASEL;
+		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
+			buddha_num_hwifs = XSURF_NUM_HWIFS;
+			type=BOARD_XSURF;
+			d.port_ops = &xsurf_port_ops;
+		} else 
+			continue;
+		
+		board = z->resource.start;
+
+		if(type != BOARD_XSURF) {
+			if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
+				continue;
+		} else {
+			if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
+				continue;
+			if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
+				goto fail_base2;
+			if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
+				release_mem_region(board+XSURF_BASE2, 0x1000);
+fail_base2:
+				release_mem_region(board+XSURF_BASE1, 0x1000);
+				continue;
+			}
+		}	  
+		buddha_board = (unsigned long)ZTWO_VADDR(board);
+		
+		/* write to BUDDHA_IRQ_MR to enable the board IRQ */
+		/* X-Surf doesn't have this.  IRQs are always on */
+		if (type != BOARD_XSURF)
+			z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
+
+		printk(KERN_INFO "ide: %s IDE controller\n",
+				 buddha_board_name[type]);
+
+		for (i = 0; i < buddha_num_hwifs; i++) {
+			unsigned long base, ctl, irq_port;
+
+			if (type != BOARD_XSURF) {
+				base = buddha_board + buddha_bases[i];
+				ctl = base + BUDDHA_CONTROL;
+				irq_port = buddha_board + buddha_irqports[i];
+			} else {
+				base = buddha_board + xsurf_bases[i];
+				/* X-Surf has no CS1* (Control/AltStat) */
+				ctl = 0;
+				irq_port = buddha_board + xsurf_irqports[i];
+			}
+
+			buddha_setup_ports(&hw[i], base, ctl, irq_port);
+
+			hws[i] = &hw[i];
+		}
+
+		ide_host_add(&d, hws, i, NULL);
+	}
+
+	return 0;
+}
+
+module_init(buddha_init);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cmd640.c b/drivers/ide/cmd640.c
new file mode 100644
index 000000000..f48decb9f
--- /dev/null
+++ b/drivers/ide/cmd640.c
@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1995-1996  Linus Torvalds & authors (see below)
+ */
+
+/*
+ *  Original authors:	abramov@cecmow.enet.dec.com (Igor Abramov)
+ *			mlord@pobox.com (Mark Lord)
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ *  This file provides support for the advanced features and bugs
+ *  of IDE interfaces using the CMD Technologies 0640 IDE interface chip.
+ *
+ *  These chips are basically fucked by design, and getting this driver
+ *  to work on every motherboard design that uses this screwed chip seems
+ *  bloody well impossible.  However, we're still trying.
+ *
+ *  Version 0.97 worked for everybody.
+ *
+ *  User feedback is essential.  Many thanks to the beta test team:
+ *
+ *  A.Hartgers@stud.tue.nl, JZDQC@CUNYVM.CUNY.edu, abramov@cecmow.enet.dec.com,
+ *  bardj@utopia.ppp.sn.no, bart@gaga.tue.nl, bbol001@cs.auckland.ac.nz,
+ *  chrisc@dbass.demon.co.uk, dalecki@namu26.Num.Math.Uni-Goettingen.de,
+ *  derekn@vw.ece.cmu.edu, florian@btp2x3.phy.uni-bayreuth.de,
+ *  flynn@dei.unipd.it, gadio@netvision.net.il, godzilla@futuris.net,
+ *  j@pobox.com, jkemp1@mises.uni-paderborn.de, jtoppe@hiwaay.net,
+ *  kerouac@ssnet.com, meskes@informatik.rwth-aachen.de, hzoli@cs.elte.hu,
+ *  peter@udgaard.isgtec.com, phil@tazenda.demon.co.uk, roadcapw@cfw.com,
+ *  s0033las@sun10.vsz.bme.hu, schaffer@tam.cornell.edu, sjd@slip.net,
+ *  steve@ei.org, ulrpeg@bigcomm.gun.de, ism@tardis.ed.ac.uk, mack@cray.com
+ *  liug@mama.indstate.edu, and others.
+ *
+ *  Version 0.01	Initial version, hacked out of ide.c,
+ *			and #include'd rather than compiled separately.
+ *			This will get cleaned up in a subsequent release.
+ *
+ *  Version 0.02	Fixes for vlb initialization code, enable prefetch
+ *			for versions 'B' and 'C' of chip by default,
+ *			some code cleanup.
+ *
+ *  Version 0.03	Added reset of secondary interface,
+ *			and black list for devices which are not compatible
+ *			with prefetch mode. Separate function for setting
+ *			prefetch is added, possibly it will be called some
+ *			day from ioctl processing code.
+ *
+ *  Version 0.04	Now configs/compiles separate from ide.c
+ *
+ *  Version 0.05	Major rewrite of interface timing code.
+ *			Added new function cmd640_set_mode to set PIO mode
+ *			from ioctl call. New drives added to black list.
+ *
+ *  Version 0.06	More code cleanup. Prefetch is enabled only for
+ *			detected hard drives, not included in prefetch
+ *			black list.
+ *
+ *  Version 0.07	Changed to more conservative drive tuning policy.
+ *			Unknown drives, which report PIO < 4 are set to
+ *			(reported_PIO - 1) if it is supported, or to PIO0.
+ *			List of known drives extended by info provided by
+ *			CMD at their ftp site.
+ *
+ *  Version 0.08	Added autotune/noautotune support.
+ *
+ *  Version 0.09	Try to be smarter about 2nd port enabling.
+ *  Version 0.10	Be nice and don't reset 2nd port.
+ *  Version 0.11	Try to handle more weird situations.
+ *
+ *  Version 0.12	Lots of bug fixes from Laszlo Peter
+ *			irq unmasking disabled for reliability.
+ *			try to be even smarter about the second port.
+ *			tidy up source code formatting.
+ *  Version 0.13	permit irq unmasking again.
+ *  Version 0.90	massive code cleanup, some bugs fixed.
+ *			defaults all drives to PIO mode0, prefetch off.
+ *			autotune is OFF by default, with compile time flag.
+ *			prefetch can be turned OFF/ON using "hdparm -p8/-p9"
+ *			 (requires hdparm-3.1 or newer)
+ *  Version 0.91	first release to linux-kernel list.
+ *  Version 0.92	move initial reg dump to separate callable function
+ *			change "readahead" to "prefetch" to avoid confusion
+ *  Version 0.95	respect original BIOS timings unless autotuning.
+ *			tons of code cleanup and rearrangement.
+ *			added CONFIG_BLK_DEV_CMD640_ENHANCED option
+ *			prevent use of unmask when prefetch is on
+ *  Version 0.96	prevent use of io_32bit when prefetch is off
+ *  Version 0.97	fix VLB secondary interface for sjd@slip.net
+ *			other minor tune-ups:  0.96 was very good.
+ *  Version 0.98	ignore PCI version when disabled by BIOS
+ *  Version 0.99	display setup/active/recovery clocks with PIO mode
+ *  Version 1.00	Mmm.. cannot depend on PCMD_ENA in all systems
+ *  Version 1.01	slow/fast devsel can be selected with "hdparm -p6/-p7"
+ *			 ("fast" is necessary for 32bit I/O in some systems)
+ *  Version 1.02	fix bug that resulted in slow "setup times"
+ *			 (patch courtesy of Zoltan Hidvegi)
+ */
+
+#define CMD640_PREFETCH_MASKS 1
+
+/*#define CMD640_DUMP_REGS */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "cmd640"
+
+static bool cmd640_vlb;
+
+/*
+ * CMD640 specific registers definition.
+ */
+
+#define VID		0x00
+#define DID		0x02
+#define PCMD		0x04
+#define   PCMD_ENA	0x01
+#define PSTTS		0x06
+#define REVID		0x08
+#define PROGIF		0x09
+#define SUBCL		0x0a
+#define BASCL		0x0b
+#define BaseA0		0x10
+#define BaseA1		0x14
+#define BaseA2		0x18
+#define BaseA3		0x1c
+#define INTLINE		0x3c
+#define INPINE		0x3d
+
+#define	CFR		0x50
+#define   CFR_DEVREV		0x03
+#define   CFR_IDE01INTR		0x04
+#define	  CFR_DEVID		0x18
+#define	  CFR_AT_VESA_078h	0x20
+#define	  CFR_DSA1		0x40
+#define	  CFR_DSA0		0x80
+
+#define CNTRL		0x51
+#define	  CNTRL_DIS_RA0		0x40
+#define   CNTRL_DIS_RA1		0x80
+#define	  CNTRL_ENA_2ND		0x08
+
+#define	CMDTIM		0x52
+#define	ARTTIM0		0x53
+#define	DRWTIM0		0x54
+#define ARTTIM1 	0x55
+#define DRWTIM1		0x56
+#define ARTTIM23	0x57
+#define   ARTTIM23_DIS_RA2	0x04
+#define   ARTTIM23_DIS_RA3	0x08
+#define   ARTTIM23_IDE23INTR	0x10
+#define DRWTIM23	0x58
+#define BRST		0x59
+
+/*
+ * Registers and masks for easy access by drive index:
+ */
+static u8 prefetch_regs[4]  = {CNTRL, CNTRL, ARTTIM23, ARTTIM23};
+static u8 prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, ARTTIM23_DIS_RA3};
+
+#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
+
+static u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
+static u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM23, DRWTIM23};
+
+/*
+ * Current cmd640 timing values for each drive.
+ * The defaults for each are the slowest possible timings.
+ */
+static u8 setup_counts[4]    = {4, 4, 4, 4};     /* Address setup count (in clocks) */
+static u8 active_counts[4]   = {16, 16, 16, 16}; /* Active count   (encoded) */
+static u8 recovery_counts[4] = {16, 16, 16, 16}; /* Recovery count (encoded) */
+
+#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
+
+static DEFINE_SPINLOCK(cmd640_lock);
+
+/*
+ * Interface to access cmd640x registers
+ */
+static unsigned int cmd640_key;
+static void (*__put_cmd640_reg)(u16 reg, u8 val);
+static u8 (*__get_cmd640_reg)(u16 reg);
+
+/*
+ * This is read from the CFR reg, and is used in several places.
+ */
+static unsigned int cmd640_chip_version;
+
+/*
+ * The CMD640x chip does not support DWORD config write cycles, but some
+ * of the BIOSes use them to implement the config services.
+ * Therefore, we must use direct IO instead.
+ */
+
+/* PCI method 1 access */
+
+static void put_cmd640_reg_pci1(u16 reg, u8 val)
+{
+	outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
+	outb_p(val, (reg & 3) | 0xcfc);
+}
+
+static u8 get_cmd640_reg_pci1(u16 reg)
+{
+	outl_p((reg & 0xfc) | cmd640_key, 0xcf8);
+	return inb_p((reg & 3) | 0xcfc);
+}
+
+/* PCI method 2 access (from CMD datasheet) */
+
+static void put_cmd640_reg_pci2(u16 reg, u8 val)
+{
+	outb_p(0x10, 0xcf8);
+	outb_p(val, cmd640_key + reg);
+	outb_p(0, 0xcf8);
+}
+
+static u8 get_cmd640_reg_pci2(u16 reg)
+{
+	u8 b;
+
+	outb_p(0x10, 0xcf8);
+	b = inb_p(cmd640_key + reg);
+	outb_p(0, 0xcf8);
+	return b;
+}
+
+/* VLB access */
+
+static void put_cmd640_reg_vlb(u16 reg, u8 val)
+{
+	outb_p(reg, cmd640_key);
+	outb_p(val, cmd640_key + 4);
+}
+
+static u8 get_cmd640_reg_vlb(u16 reg)
+{
+	outb_p(reg, cmd640_key);
+	return inb_p(cmd640_key + 4);
+}
+
+static u8 get_cmd640_reg(u16 reg)
+{
+	unsigned long flags;
+	u8 b;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+	b = __get_cmd640_reg(reg);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+	return b;
+}
+
+static void put_cmd640_reg(u16 reg, u8 val)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+	__put_cmd640_reg(reg, val);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+}
+
+static int __init match_pci_cmd640_device(void)
+{
+	const u8 ven_dev[4] = {0x95, 0x10, 0x40, 0x06};
+	unsigned int i;
+	for (i = 0; i < 4; i++) {
+		if (get_cmd640_reg(i) != ven_dev[i])
+			return 0;
+	}
+#ifdef STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT
+	if ((get_cmd640_reg(PCMD) & PCMD_ENA) == 0) {
+		printk("ide: cmd640 on PCI disabled by BIOS\n");
+		return 0;
+	}
+#endif /* STUPIDLY_TRUST_BROKEN_PCMD_ENA_BIT */
+	return 1; /* success */
+}
+
+/*
+ * Probe for CMD640x -- pci method 1
+ */
+static int __init probe_for_cmd640_pci1(void)
+{
+	__get_cmd640_reg = get_cmd640_reg_pci1;
+	__put_cmd640_reg = put_cmd640_reg_pci1;
+	for (cmd640_key = 0x80000000;
+	     cmd640_key <= 0x8000f800;
+	     cmd640_key += 0x800) {
+		if (match_pci_cmd640_device())
+			return 1; /* success */
+	}
+	return 0;
+}
+
+/*
+ * Probe for CMD640x -- pci method 2
+ */
+static int __init probe_for_cmd640_pci2(void)
+{
+	__get_cmd640_reg = get_cmd640_reg_pci2;
+	__put_cmd640_reg = put_cmd640_reg_pci2;
+	for (cmd640_key = 0xc000; cmd640_key <= 0xcf00; cmd640_key += 0x100) {
+		if (match_pci_cmd640_device())
+			return 1; /* success */
+	}
+	return 0;
+}
+
+/*
+ * Probe for CMD640x -- vlb
+ */
+static int __init probe_for_cmd640_vlb(void)
+{
+	u8 b;
+
+	__get_cmd640_reg = get_cmd640_reg_vlb;
+	__put_cmd640_reg = put_cmd640_reg_vlb;
+	cmd640_key = 0x178;
+	b = get_cmd640_reg(CFR);
+	if (b == 0xff || b == 0x00 || (b & CFR_AT_VESA_078h)) {
+		cmd640_key = 0x78;
+		b = get_cmd640_reg(CFR);
+		if (b == 0xff || b == 0x00 || !(b & CFR_AT_VESA_078h))
+			return 0;
+	}
+	return 1; /* success */
+}
+
+/*
+ *  Returns 1 if an IDE interface/drive exists at 0x170,
+ *  Returns 0 otherwise.
+ */
+static int __init secondary_port_responding(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+
+	outb_p(0x0a, 0x176);	/* select drive0 */
+	udelay(100);
+	if ((inb_p(0x176) & 0x1f) != 0x0a) {
+		outb_p(0x1a, 0x176); /* select drive1 */
+		udelay(100);
+		if ((inb_p(0x176) & 0x1f) != 0x1a) {
+			spin_unlock_irqrestore(&cmd640_lock, flags);
+			return 0; /* nothing responded */
+		}
+	}
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+	return 1; /* success */
+}
+
+#ifdef CMD640_DUMP_REGS
+/*
+ * Dump out all cmd640 registers.  May be called from ide.c
+ */
+static void cmd640_dump_regs(void)
+{
+	unsigned int reg = cmd640_vlb ? 0x50 : 0x00;
+
+	/* Dump current state of chip registers */
+	printk("ide: cmd640 internal register dump:");
+	for (; reg <= 0x59; reg++) {
+		if (!(reg & 0x0f))
+			printk("\n%04x:", reg);
+		printk(" %02x", get_cmd640_reg(reg));
+	}
+	printk("\n");
+}
+#endif
+
+static void __set_prefetch_mode(ide_drive_t *drive, int mode)
+{
+	if (mode) {	/* want prefetch on? */
+#if CMD640_PREFETCH_MASKS
+		drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
+		drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+#endif
+		drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
+	} else {
+		drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;
+		drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
+		drive->io_32bit = 0;
+	}
+}
+
+#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
+/*
+ * Check whether prefetch is on for a drive,
+ * and initialize the unmask flags for safe operation.
+ */
+static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
+{
+	u8 b = get_cmd640_reg(prefetch_regs[index]);
+
+	__set_prefetch_mode(drive, (b & prefetch_masks[index]) ? 0 : 1);
+}
+#else
+
+/*
+ * Sets prefetch mode for a drive.
+ */
+static void set_prefetch_mode(ide_drive_t *drive, unsigned int index, int mode)
+{
+	unsigned long flags;
+	int reg = prefetch_regs[index];
+	u8 b;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+	b = __get_cmd640_reg(reg);
+	__set_prefetch_mode(drive, mode);
+	if (mode)
+		b &= ~prefetch_masks[index];	/* enable prefetch */
+	else
+		b |= prefetch_masks[index];	/* disable prefetch */
+	__put_cmd640_reg(reg, b);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+}
+
+/*
+ * Dump out current drive clocks settings
+ */
+static void display_clocks(unsigned int index)
+{
+	u8 active_count, recovery_count;
+
+	active_count = active_counts[index];
+	if (active_count == 1)
+		++active_count;
+	recovery_count = recovery_counts[index];
+	if (active_count > 3 && recovery_count == 1)
+		++recovery_count;
+	if (cmd640_chip_version > 1)
+		recovery_count += 1;  /* cmd640b uses (count + 1)*/
+	printk(", clocks=%d/%d/%d\n", setup_counts[index], active_count, recovery_count);
+}
+
+/*
+ * Pack active and recovery counts into single byte representation
+ * used by controller
+ */
+static inline u8 pack_nibbles(u8 upper, u8 lower)
+{
+	return ((upper & 0x0f) << 4) | (lower & 0x0f);
+}
+
+/*
+ * This routine writes the prepared setup/active/recovery counts
+ * for a drive into the cmd640 chipset registers to active them.
+ */
+static void program_drive_counts(ide_drive_t *drive, unsigned int index)
+{
+	unsigned long flags;
+	u8 setup_count    = setup_counts[index];
+	u8 active_count   = active_counts[index];
+	u8 recovery_count = recovery_counts[index];
+
+	/*
+	 * Set up address setup count and drive read/write timing registers.
+	 * Primary interface has individual count/timing registers for
+	 * each drive.  Secondary interface has one common set of registers,
+	 * so we merge the timings, using the slowest value for each timing.
+	 */
+	if (index > 1) {
+		ide_drive_t *peer = ide_get_pair_dev(drive);
+		unsigned int mate = index ^ 1;
+
+		if (peer) {
+			if (setup_count < setup_counts[mate])
+				setup_count = setup_counts[mate];
+			if (active_count < active_counts[mate])
+				active_count = active_counts[mate];
+			if (recovery_count < recovery_counts[mate])
+				recovery_count = recovery_counts[mate];
+		}
+	}
+
+	/*
+	 * Convert setup_count to internal chipset representation
+	 */
+	switch (setup_count) {
+	case 4:	 setup_count = 0x00; break;
+	case 3:	 setup_count = 0x80; break;
+	case 1:
+	case 2:	 setup_count = 0x40; break;
+	default: setup_count = 0xc0; /* case 5 */
+	}
+
+	/*
+	 * Now that everything is ready, program the new timings
+	 */
+	spin_lock_irqsave(&cmd640_lock, flags);
+	/*
+	 * Program the address_setup clocks into ARTTIM reg,
+	 * and then the active/recovery counts into the DRWTIM reg
+	 * (this converts counts of 16 into counts of zero -- okay).
+	 */
+	setup_count |= __get_cmd640_reg(arttim_regs[index]) & 0x3f;
+	__put_cmd640_reg(arttim_regs[index], setup_count);
+	__put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count));
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+}
+
+/*
+ * Set a specific pio_mode for a drive
+ */
+static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
+			    u8 pio_mode, unsigned int cycle_time)
+{
+	struct ide_timing *t;
+	int setup_time, active_time, recovery_time, clock_time;
+	u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count;
+	int bus_speed;
+
+	if (cmd640_vlb)
+		bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
+	else
+		bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+
+	if (pio_mode > 5)
+		pio_mode = 5;
+
+	t = ide_timing_find_mode(XFER_PIO_0 + pio_mode);
+	setup_time  = t->setup;
+	active_time = t->active;
+
+	recovery_time = cycle_time - (setup_time + active_time);
+	clock_time = 1000 / bus_speed;
+	cycle_count = DIV_ROUND_UP(cycle_time, clock_time);
+
+	setup_count = DIV_ROUND_UP(setup_time, clock_time);
+
+	active_count = DIV_ROUND_UP(active_time, clock_time);
+	if (active_count < 2)
+		active_count = 2; /* minimum allowed by cmd640 */
+
+	recovery_count = DIV_ROUND_UP(recovery_time, clock_time);
+	recovery_count2 = cycle_count - (setup_count + active_count);
+	if (recovery_count2 > recovery_count)
+		recovery_count = recovery_count2;
+	if (recovery_count < 2)
+		recovery_count = 2; /* minimum allowed by cmd640 */
+	if (recovery_count > 17) {
+		active_count += recovery_count - 17;
+		recovery_count = 17;
+	}
+	if (active_count > 16)
+		active_count = 16; /* maximum allowed by cmd640 */
+	if (cmd640_chip_version > 1)
+		recovery_count -= 1;  /* cmd640b uses (count + 1)*/
+	if (recovery_count > 16)
+		recovery_count = 16; /* maximum allowed by cmd640 */
+
+	setup_counts[index]    = setup_count;
+	active_counts[index]   = active_count;
+	recovery_counts[index] = recovery_count;
+
+	/*
+	 * In a perfect world, we might set the drive pio mode here
+	 * (using WIN_SETFEATURE) before continuing.
+	 *
+	 * But we do not, because:
+	 *	1) this is the wrong place to do it (proper is do_special() in ide.c)
+	 * 	2) in practice this is rarely, if ever, necessary
+	 */
+	program_drive_counts(drive, index);
+}
+
+static void cmd640_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned int index = 0, cycle_time;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	u8 b;
+
+	switch (pio) {
+	case 6: /* set fast-devsel off */
+	case 7: /* set fast-devsel on */
+		b = get_cmd640_reg(CNTRL) & ~0x27;
+		if (pio & 1)
+			b |= 0x27;
+		put_cmd640_reg(CNTRL, b);
+		printk("%s: %sabled cmd640 fast host timing (devsel)\n",
+			drive->name, (pio & 1) ? "en" : "dis");
+		return;
+	case 8: /* set prefetch off */
+	case 9: /* set prefetch on */
+		set_prefetch_mode(drive, index, pio & 1);
+		printk("%s: %sabled cmd640 prefetch\n",
+			drive->name, (pio & 1) ? "en" : "dis");
+		return;
+	}
+
+	cycle_time = ide_pio_cycle_time(drive, pio);
+	cmd640_set_mode(drive, index, pio, cycle_time);
+
+	printk("%s: selected cmd640 PIO mode%d (%dns)",
+		drive->name, pio, cycle_time);
+
+	display_clocks(index);
+}
+#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
+
+static void __init cmd640_init_dev(ide_drive_t *drive)
+{
+	unsigned int i = drive->hwif->channel * 2 + (drive->dn & 1);
+
+#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
+	/*
+	 * Reset timing to the slowest speed and turn off prefetch.
+	 * This way, the drive identify code has a better chance.
+	 */
+	setup_counts[i]    =  4;	/* max possible */
+	active_counts[i]   = 16;	/* max possible */
+	recovery_counts[i] = 16;	/* max possible */
+	program_drive_counts(drive, i);
+	set_prefetch_mode(drive, i, 0);
+	printk(KERN_INFO DRV_NAME ": drive%d timings/prefetch cleared\n", i);
+#else
+	/*
+	 * Set the drive unmask flags to match the prefetch setting.
+	 */
+	check_prefetch(drive, i);
+	printk(KERN_INFO DRV_NAME ": drive%d timings/prefetch(%s) preserved\n",
+		i, (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT) ? "off" : "on");
+#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
+}
+
+static int cmd640_test_irq(ide_hwif_t *hwif)
+{
+	int irq_reg		= hwif->channel ? ARTTIM23 : CFR;
+	u8  irq_mask		= hwif->channel ? ARTTIM23_IDE23INTR :
+						  CFR_IDE01INTR;
+	u8  irq_stat		= get_cmd640_reg(irq_reg);
+
+	return (irq_stat & irq_mask) ? 1 : 0;
+}
+
+static const struct ide_port_ops cmd640_port_ops = {
+	.init_dev		= cmd640_init_dev,
+#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
+	.set_pio_mode		= cmd640_set_pio_mode,
+#endif
+	.test_irq		= cmd640_test_irq,
+};
+
+static int pci_conf1(void)
+{
+	unsigned long flags;
+	u32 tmp;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+	outb(0x01, 0xCFB);
+	tmp = inl(0xCF8);
+	outl(0x80000000, 0xCF8);
+	if (inl(0xCF8) == 0x80000000) {
+		outl(tmp, 0xCF8);
+		spin_unlock_irqrestore(&cmd640_lock, flags);
+		return 1;
+	}
+	outl(tmp, 0xCF8);
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+	return 0;
+}
+
+static int pci_conf2(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&cmd640_lock, flags);
+	outb(0x00, 0xCFB);
+	outb(0x00, 0xCF8);
+	outb(0x00, 0xCFA);
+	if (inb(0xCF8) == 0x00 && inb(0xCF8) == 0x00) {
+		spin_unlock_irqrestore(&cmd640_lock, flags);
+		return 1;
+	}
+	spin_unlock_irqrestore(&cmd640_lock, flags);
+	return 0;
+}
+
+static const struct ide_port_info cmd640_port_info __initconst = {
+	.chipset		= ide_cmd640,
+	.host_flags		= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_ABUSE_FAST_DEVSEL,
+	.port_ops		= &cmd640_port_ops,
+	.pio_mask		= ATA_PIO5,
+};
+
+static int __init cmd640x_init_one(unsigned long base, unsigned long ctl)
+{
+	if (!request_region(base, 8, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				DRV_NAME, base, base + 7);
+		return -EBUSY;
+	}
+
+	if (!request_region(ctl, 1, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+				DRV_NAME, ctl);
+		release_region(base, 8);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+/*
+ * Probe for a cmd640 chipset, and initialize it if found.
+ */
+static int __init cmd640x_init(void)
+{
+	int second_port_cmd640 = 0, rc;
+	const char *bus_type, *port2;
+	u8 b, cfr;
+	struct ide_hw hw[2], *hws[2];
+
+	if (cmd640_vlb && probe_for_cmd640_vlb()) {
+		bus_type = "VLB";
+	} else {
+		cmd640_vlb = 0;
+		/* Find out what kind of PCI probing is supported otherwise
+		   Justin Gibbs will sulk.. */
+		if (pci_conf1() && probe_for_cmd640_pci1())
+			bus_type = "PCI (type1)";
+		else if (pci_conf2() && probe_for_cmd640_pci2())
+			bus_type = "PCI (type2)";
+		else
+			return 0;
+	}
+	/*
+	 * Undocumented magic (there is no 0x5b reg in specs)
+	 */
+	put_cmd640_reg(0x5b, 0xbd);
+	if (get_cmd640_reg(0x5b) != 0xbd) {
+		printk(KERN_ERR "ide: cmd640 init failed: wrong value in reg 0x5b\n");
+		return 0;
+	}
+	put_cmd640_reg(0x5b, 0);
+
+#ifdef CMD640_DUMP_REGS
+	cmd640_dump_regs();
+#endif
+
+	/*
+	 * Documented magic begins here
+	 */
+	cfr = get_cmd640_reg(CFR);
+	cmd640_chip_version = cfr & CFR_DEVREV;
+	if (cmd640_chip_version == 0) {
+		printk("ide: bad cmd640 revision: %d\n", cmd640_chip_version);
+		return 0;
+	}
+
+	rc = cmd640x_init_one(0x1f0, 0x3f6);
+	if (rc)
+		return rc;
+
+	rc = cmd640x_init_one(0x170, 0x376);
+	if (rc) {
+		release_region(0x3f6, 1);
+		release_region(0x1f0, 8);
+		return rc;
+	}
+
+	memset(&hw, 0, sizeof(hw));
+
+	ide_std_init_ports(&hw[0], 0x1f0, 0x3f6);
+	hw[0].irq = 14;
+
+	ide_std_init_ports(&hw[1], 0x170, 0x376);
+	hw[1].irq = 15;
+
+	printk(KERN_INFO "cmd640: buggy cmd640%c interface on %s, config=0x%02x"
+			 "\n", 'a' + cmd640_chip_version - 1, bus_type, cfr);
+
+	/*
+	 * Initialize data for primary port
+	 */
+	hws[0] = &hw[0];
+
+	/*
+	 * Ensure compatibility by always using the slowest timings
+	 * for access to the drive's command register block,
+	 * and reset the prefetch burstsize to default (512 bytes).
+	 *
+	 * Maybe we need a way to NOT do these on *some* systems?
+	 */
+	put_cmd640_reg(CMDTIM, 0);
+	put_cmd640_reg(BRST, 0x40);
+
+	b = get_cmd640_reg(CNTRL);
+
+	/*
+	 * Try to enable the secondary interface, if not already enabled
+	 */
+	if (secondary_port_responding()) {
+		if ((b & CNTRL_ENA_2ND)) {
+			second_port_cmd640 = 1;
+			port2 = "okay";
+		} else if (cmd640_vlb) {
+			second_port_cmd640 = 1;
+			port2 = "alive";
+		} else
+			port2 = "not cmd640";
+	} else {
+		put_cmd640_reg(CNTRL, b ^ CNTRL_ENA_2ND); /* toggle the bit */
+		if (secondary_port_responding()) {
+			second_port_cmd640 = 1;
+			port2 = "enabled";
+		} else {
+			put_cmd640_reg(CNTRL, b); /* restore original setting */
+			port2 = "not responding";
+		}
+	}
+
+	/*
+	 * Initialize data for secondary cmd640 port, if enabled
+	 */
+	if (second_port_cmd640)
+		hws[1] = &hw[1];
+
+	printk(KERN_INFO "cmd640: %sserialized, secondary interface %s\n",
+			 second_port_cmd640 ? "" : "not ", port2);
+
+#ifdef CMD640_DUMP_REGS
+	cmd640_dump_regs();
+#endif
+
+	return ide_host_add(&cmd640_port_info, hws, second_port_cmd640 ? 2 : 1,
+			    NULL);
+}
+
+module_param_named(probe_vlb, cmd640_vlb, bool, 0);
+MODULE_PARM_DESC(probe_vlb, "probe for VLB version of CMD640 chipset");
+
+module_init(cmd640x_init);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
new file mode 100644
index 000000000..943bf944b
--- /dev/null
+++ b/drivers/ide/cmd64x.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
+ *           Due to massive hardware bugs, UltraDMA is only supported
+ *           on the 646U2 and not on the 646U.
+ *
+ * Copyright (C) 1998		Eddie C. Dost  (ecd@skynet.be)
+ * Copyright (C) 1998		David S. Miller (davem@redhat.com)
+ *
+ * Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2007-2010	Bartlomiej Zolnierkiewicz
+ * Copyright (C) 2007,2009	MontaVista Software, Inc. <source@mvista.com>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "cmd64x"
+
+/*
+ * CMD64x specific registers definition.
+ */
+#define CFR		0x50
+#define   CFR_INTR_CH0		0x04
+
+#define	CMDTIM		0x52
+#define	ARTTIM0		0x53
+#define	DRWTIM0		0x54
+#define ARTTIM1 	0x55
+#define DRWTIM1		0x56
+#define ARTTIM23	0x57
+#define   ARTTIM23_DIS_RA2	0x04
+#define   ARTTIM23_DIS_RA3	0x08
+#define   ARTTIM23_INTR_CH1	0x10
+#define DRWTIM2		0x58
+#define BRST		0x59
+#define DRWTIM3		0x5b
+
+#define BMIDECR0	0x70
+#define MRDMODE		0x71
+#define   MRDMODE_INTR_CH0	0x04
+#define   MRDMODE_INTR_CH1	0x08
+#define UDIDETCR0	0x73
+#define DTPR0		0x74
+#define BMIDECR1	0x78
+#define BMIDECSR	0x79
+#define UDIDETCR1	0x7B
+#define DTPR1		0x7C
+
+static void cmd64x_program_timings(ide_drive_t *drive, u8 mode)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+	const unsigned long T = 1000000 / bus_speed;
+	static const u8 recovery_values[] =
+		{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
+	static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0};
+	static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23};
+	static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3};
+	struct ide_timing t;
+	u8 arttim = 0;
+
+	if (drive->dn >= ARRAY_SIZE(drwtim_regs))
+		return;
+
+	ide_timing_compute(drive, mode, &t, T, 0);
+
+	/*
+	 * In case we've got too long recovery phase, try to lengthen
+	 * the active phase
+	 */
+	if (t.recover > 16) {
+		t.active += t.recover - 16;
+		t.recover = 16;
+	}
+	if (t.active > 16)		/* shouldn't actually happen... */
+		t.active = 16;
+
+	/*
+	 * Convert values to internal chipset representation
+	 */
+	t.recover = recovery_values[t.recover];
+	t.active &= 0x0f;
+
+	/* Program the active/recovery counts into the DRWTIM register */
+	pci_write_config_byte(dev, drwtim_regs[drive->dn],
+			      (t.active << 4) | t.recover);
+
+	/*
+	 * The primary channel has individual address setup timing registers
+	 * for each drive and the hardware selects the slowest timing itself.
+	 * The secondary channel has one common register and we have to select
+	 * the slowest address setup timing ourselves.
+	 */
+	if (hwif->channel) {
+		ide_drive_t *pair = ide_get_pair_dev(drive);
+
+		if (pair) {
+			struct ide_timing tp;
+
+			ide_timing_compute(pair, pair->pio_mode, &tp, T, 0);
+			ide_timing_merge(&t, &tp, &t, IDE_TIMING_SETUP);
+			if (pair->dma_mode) {
+				ide_timing_compute(pair, pair->dma_mode,
+						&tp, T, 0);
+				ide_timing_merge(&tp, &t, &t, IDE_TIMING_SETUP);
+			}
+		}
+	}
+
+	if (t.setup > 5)		/* shouldn't actually happen... */
+		t.setup = 5;
+
+	/*
+	 * Program the address setup clocks into the ARTTIM registers.
+	 * Avoid clearing the secondary channel's interrupt bit.
+	 */
+	(void) pci_read_config_byte (dev, arttim_regs[drive->dn], &arttim);
+	if (hwif->channel)
+		arttim &= ~ARTTIM23_INTR_CH1;
+	arttim &= ~0xc0;
+	arttim |= setup_values[t.setup];
+	(void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim);
+}
+
+/*
+ * Attempts to set drive's PIO mode.
+ * Special cases are 8: prefetch off, 9: prefetch on (both never worked)
+ */
+
+static void cmd64x_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	/*
+	 * Filter out the prefetch control values
+	 * to prevent PIO5 from being programmed
+	 */
+	if (pio == 8 || pio == 9)
+		return;
+
+	cmd64x_program_timings(drive, XFER_PIO_0 + pio);
+}
+
+static void cmd64x_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 unit			= drive->dn & 0x01;
+	u8 regU = 0, pciU	= hwif->channel ? UDIDETCR1 : UDIDETCR0;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_byte(dev, pciU, &regU);
+	regU &= ~(unit ? 0xCA : 0x35);
+
+	switch(speed) {
+	case XFER_UDMA_5:
+		regU |= unit ? 0x0A : 0x05;
+		break;
+	case XFER_UDMA_4:
+		regU |= unit ? 0x4A : 0x15;
+		break;
+	case XFER_UDMA_3:
+		regU |= unit ? 0x8A : 0x25;
+		break;
+	case XFER_UDMA_2:
+		regU |= unit ? 0x42 : 0x11;
+		break;
+	case XFER_UDMA_1:
+		regU |= unit ? 0x82 : 0x21;
+		break;
+	case XFER_UDMA_0:
+		regU |= unit ? 0xC2 : 0x31;
+		break;
+	case XFER_MW_DMA_2:
+	case XFER_MW_DMA_1:
+	case XFER_MW_DMA_0:
+		cmd64x_program_timings(drive, speed);
+		break;
+	}
+
+	pci_write_config_byte(dev, pciU, regU);
+}
+
+static void cmd648_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= pci_resource_start(dev, 4);
+	u8  irq_mask		= hwif->channel ? MRDMODE_INTR_CH1 :
+						  MRDMODE_INTR_CH0;
+	u8  mrdmode		= inb(base + 1);
+
+	/* clear the interrupt bit */
+	outb((mrdmode & ~(MRDMODE_INTR_CH0 | MRDMODE_INTR_CH1)) | irq_mask,
+	     base + 1);
+}
+
+static void cmd64x_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int irq_reg		= hwif->channel ? ARTTIM23 : CFR;
+	u8  irq_mask		= hwif->channel ? ARTTIM23_INTR_CH1 :
+						  CFR_INTR_CH0;
+	u8  irq_stat		= 0;
+
+	(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
+	/* clear the interrupt bit */
+	(void) pci_write_config_byte(dev, irq_reg, irq_stat | irq_mask);
+}
+
+static int cmd648_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= pci_resource_start(dev, 4);
+	u8 irq_mask		= hwif->channel ? MRDMODE_INTR_CH1 :
+						  MRDMODE_INTR_CH0;
+	u8 mrdmode		= inb(base + 1);
+
+	pr_debug("%s: mrdmode: 0x%02x irq_mask: 0x%02x\n",
+		 hwif->name, mrdmode, irq_mask);
+
+	return (mrdmode & irq_mask) ? 1 : 0;
+}
+
+static int cmd64x_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int irq_reg		= hwif->channel ? ARTTIM23 : CFR;
+	u8  irq_mask		= hwif->channel ? ARTTIM23_INTR_CH1 :
+						  CFR_INTR_CH0;
+	u8  irq_stat		= 0;
+
+	(void) pci_read_config_byte(dev, irq_reg, &irq_stat);
+
+	pr_debug("%s: irq_stat: 0x%02x irq_mask: 0x%02x\n",
+		 hwif->name, irq_stat, irq_mask);
+
+	return (irq_stat & irq_mask) ? 1 : 0;
+}
+
+/*
+ * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old
+ * event order for DMA transfers.
+ */
+
+static int cmd646_1_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = 0, dma_cmd = 0;
+
+	/* get DMA status */
+	dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
+	/* read DMA command state */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	/* stop DMA */
+	outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+	/* clear the INTR & ERROR bits */
+	outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+	/* verify good DMA status */
+	return (dma_stat & 7) != 4;
+}
+
+static int init_chipset_cmd64x(struct pci_dev *dev)
+{
+	u8 mrdmode = 0;
+
+	/* Set a good latency timer and cache line size value. */
+	(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);
+	/* FIXME: pci_set_master() to ensure a good latency timer value */
+
+	/*
+	 * Enable interrupts, select MEMORY READ LINE for reads.
+	 *
+	 * NOTE: although not mentioned in the PCI0646U specs,
+	 * bits 0-1 are write only and won't be read back as
+	 * set or not -- PCI0646U2 specs clarify this point.
+	 */
+	(void) pci_read_config_byte (dev, MRDMODE, &mrdmode);
+	mrdmode &= ~0x30;
+	(void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02));
+
+	return 0;
+}
+
+static u8 cmd64x_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev  *dev	= to_pci_dev(hwif->dev);
+	u8 bmidecsr = 0, mask	= hwif->channel ? 0x02 : 0x01;
+
+	switch (dev->device) {
+	case PCI_DEVICE_ID_CMD_648:
+	case PCI_DEVICE_ID_CMD_649:
+ 		pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
+		return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+	default:
+		return ATA_CBL_PATA40;
+	}
+}
+
+static const struct ide_port_ops cmd64x_port_ops = {
+	.set_pio_mode		= cmd64x_set_pio_mode,
+	.set_dma_mode		= cmd64x_set_dma_mode,
+	.clear_irq		= cmd64x_clear_irq,
+	.test_irq		= cmd64x_test_irq,
+	.cable_detect		= cmd64x_cable_detect,
+};
+
+static const struct ide_port_ops cmd648_port_ops = {
+	.set_pio_mode		= cmd64x_set_pio_mode,
+	.set_dma_mode		= cmd64x_set_dma_mode,
+	.clear_irq		= cmd648_clear_irq,
+	.test_irq		= cmd648_test_irq,
+	.cable_detect		= cmd64x_cable_detect,
+};
+
+static const struct ide_dma_ops cmd646_rev1_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= cmd646_1_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info cmd64x_chipsets[] = {
+	{	/* 0: CMD643 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd64x_port_ops,
+		.host_flags	= IDE_HFLAG_CLEAR_SIMPLEX |
+				  IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_SERIALIZE,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= 0x00, /* no udma */
+	},
+	{	/* 1: CMD646 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_SERIALIZE,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA2,
+	},
+	{	/* 2: CMD648 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA4,
+	},
+	{	/* 3: CMD649 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_cmd64x,
+		.enablebits	= {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
+		.port_ops	= &cmd648_port_ops,
+		.host_flags	= IDE_HFLAG_ABUSE_PREFETCH,
+		.pio_mask	= ATA_PIO5,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	}
+};
+
+static int cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+
+	d = cmd64x_chipsets[idx];
+
+	if (idx == 1) {
+		/*
+		 * UltraDMA only supported on PCI646U and PCI646U2, which
+		 * correspond to revisions 0x03, 0x05 and 0x07 respectively.
+		 * Actually, although the CMD tech support people won't
+		 * tell me the details, the 0x03 revision cannot support
+		 * UDMA correctly without hardware modifications, and even
+		 * then it only works with Quantum disks due to some
+		 * hold time assumptions in the 646U part which are fixed
+		 * in the 646U2.
+		 *
+		 * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
+		 */
+		if (dev->revision < 5) {
+			d.udma_mask = 0x00;
+			/*
+			 * The original PCI0646 didn't have the primary
+			 * channel enable bit, it appeared starting with
+			 * PCI0646U (i.e. revision ID 3).
+			 */
+			if (dev->revision < 3) {
+				d.enablebits[0].reg = 0;
+				d.port_ops = &cmd64x_port_ops;
+				if (dev->revision == 1)
+					d.dma_ops = &cmd646_rev1_dma_ops;
+			}
+		}
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id cmd64x_pci_tbl[] = {
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_643), 0 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_646), 1 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_648), 2 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_CMD_649), 3 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl);
+
+static struct pci_driver cmd64x_pci_driver = {
+	.name		= "CMD64x_IDE",
+	.id_table	= cmd64x_pci_tbl,
+	.probe		= cmd64x_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cmd64x_ide_init(void)
+{
+	return ide_pci_register_driver(&cmd64x_pci_driver);
+}
+
+static void __exit cmd64x_ide_exit(void)
+{
+	pci_unregister_driver(&cmd64x_pci_driver);
+}
+
+module_init(cmd64x_ide_init);
+module_exit(cmd64x_ide_exit);
+
+MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for CMD64x IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cs5520.c b/drivers/ide/cs5520.c
new file mode 100644
index 000000000..89a4ff100
--- /dev/null
+++ b/drivers/ide/cs5520.c
@@ -0,0 +1,168 @@
+/*
+ *	IDE tuning and bus mastering support for the CS5510/CS5520
+ *	chipsets
+ *
+ *	The CS5510/CS5520 are slightly unusual devices. Unlike the 
+ *	typical IDE controllers they do bus mastering with the drive in
+ *	PIO mode and smarter silicon.
+ *
+ *	The practical upshot of this is that we must always tune the
+ *	drive for the right PIO mode. We must also ignore all the blacklists
+ *	and the drive bus mastering DMA information.
+ *
+ *	*** This driver is strictly experimental ***
+ *
+ *	(c) Copyright Red Hat Inc 2002
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * For the avoidance of doubt the "preferred form" of this code is one which
+ * is in an open non patent encumbered format. Where cryptographic key signing
+ * forms part of the process of creating an executable the information
+ * including keys needed to generate an equivalently functional executable
+ * are deemed to be part of the source code.
+ *
+ */
+ 
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/dma-mapping.h>
+
+#define DRV_NAME "cs5520"
+
+struct pio_clocks
+{
+	int address;
+	int assert;
+	int recovery;
+};
+
+static struct pio_clocks cs5520_pio_clocks[]={
+	{3, 6, 11},
+	{2, 5, 6},
+	{1, 4, 3},
+	{1, 3, 2},
+	{1, 2, 1}
+};
+
+static void cs5520_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	int controller = drive->dn > 1 ? 1 : 0;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	/* 8bit CAT/CRT - 8bit command timing for channel */
+	pci_write_config_byte(pdev, 0x62 + controller, 
+		(cs5520_pio_clocks[pio].recovery << 4) |
+		(cs5520_pio_clocks[pio].assert));
+
+	/* 0x64 - 16bit Primary, 0x68 - 16bit Secondary */
+
+	/* FIXME: should these use address ? */
+	/* Data read timing */
+	pci_write_config_byte(pdev, 0x64 + 4*controller + (drive->dn&1),
+		(cs5520_pio_clocks[pio].recovery << 4) |
+		(cs5520_pio_clocks[pio].assert));
+	/* Write command timing */
+	pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1),
+		(cs5520_pio_clocks[pio].recovery << 4) |
+		(cs5520_pio_clocks[pio].assert));
+}
+
+static void cs5520_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	printk(KERN_ERR "cs55x0: bad ide timing.\n");
+
+	drive->pio_mode = XFER_PIO_0 + 0;
+	cs5520_set_pio_mode(hwif, drive);
+}
+
+static const struct ide_port_ops cs5520_port_ops = {
+	.set_pio_mode		= cs5520_set_pio_mode,
+	.set_dma_mode		= cs5520_set_dma_mode,
+};
+
+static const struct ide_port_info cyrix_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { { 0x60, 0x01, 0x01 }, { 0x60, 0x02, 0x02 } },
+	.port_ops	= &cs5520_port_ops,
+	.host_flags	= IDE_HFLAG_ISA_PORTS | IDE_HFLAG_CS5520,
+	.pio_mask	= ATA_PIO4,
+};
+
+/*
+ *	The 5510/5520 are a bit weird. They don't quite set up the way
+ *	the PCI helper layer expects so we must do much of the set up 
+ *	work longhand.
+ */
+ 
+static int cs5520_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	const struct ide_port_info *d = &cyrix_chipset;
+	struct ide_hw hw[2], *hws[] = { NULL, NULL };
+
+	ide_setup_pci_noise(dev, d);
+
+	/* We must not grab the entire device, it has 'ISA' space in its
+	 * BARS too and we will freak out other bits of the kernel
+	 */
+	if (pci_enable_device_io(dev)) {
+		printk(KERN_WARNING "%s: Unable to enable 55x0.\n", d->name);
+		return -ENODEV;
+	}
+	pci_set_master(dev);
+	if (dma_set_mask(&dev->dev, DMA_BIT_MASK(32))) {
+		printk(KERN_WARNING "%s: No suitable DMA available.\n",
+			d->name);
+		return -ENODEV;
+	}
+
+	/*
+	 *	Now the chipset is configured we can let the core
+	 *	do all the device setup for us
+	 */
+
+	ide_pci_setup_ports(dev, d, &hw[0], &hws[0]);
+	hw[0].irq = 14;
+	hw[1].irq = 15;
+
+	return ide_host_add(d, hws, 2, NULL);
+}
+
+static const struct pci_device_id cs5520_pci_tbl[] = {
+	{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), 0 },
+	{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5520), 1 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, cs5520_pci_tbl);
+
+static struct pci_driver cs5520_pci_driver = {
+	.name		= "Cyrix_IDE",
+	.id_table	= cs5520_pci_tbl,
+	.probe		= cs5520_init_one,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cs5520_ide_init(void)
+{
+	return ide_pci_register_driver(&cs5520_pci_driver);
+}
+
+module_init(cs5520_ide_init);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for Cyrix 5510/5520 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cs5530.c b/drivers/ide/cs5530.c
new file mode 100644
index 000000000..65371599b
--- /dev/null
+++ b/drivers/ide/cs5530.c
@@ -0,0 +1,295 @@
+/*
+ * Copyright (C) 2000			Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2000			Mark Lord <mlord@pobox.com>
+ * Copyright (C) 2007			Bartlomiej Zolnierkiewicz
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ *
+ * Development of this chipset driver was funded
+ * by the nice folks at National Semiconductor.
+ *
+ * Documentation:
+ *	CS5530 documentation available from National Semiconductor.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "cs5530"
+
+/*
+ * Here are the standard PIO mode 0-4 timings for each "format".
+ * Format-0 uses fast data reg timings, with slower command reg timings.
+ * Format-1 uses fast timings for all registers, but won't work with all drives.
+ */
+static unsigned int cs5530_pio_timings[2][5] = {
+	{0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},
+	{0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}
+};
+
+/*
+ * After chip reset, the PIO timings are set to 0x0000e132, which is not valid.
+ */
+#define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132)
+#define CS5530_BASEREG(hwif)	(((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20))
+
+/**
+ *	cs5530_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Handles setting of PIO mode for the chipset.
+ *
+ *	The init_hwif_cs5530() routine guarantees that all drives
+ *	will have valid default PIO timings set up before we get here.
+ */
+
+static void cs5530_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long basereg = CS5530_BASEREG(hwif);
+	unsigned int format = (inl(basereg + 4) >> 31) & 1;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	outl(cs5530_pio_timings[format][pio], basereg + ((drive->dn & 1)<<3));
+}
+
+/**
+ *	cs5530_udma_filter	-	UDMA filter
+ *	@drive: drive
+ *
+ *	cs5530_udma_filter() does UDMA mask filtering for the given drive
+ *	taking into the consideration capabilities of the mate device.
+ *
+ *	The CS5530 specifies that two drives sharing a cable cannot mix
+ *	UDMA/MDMA.  It has to be one or the other, for the pair, though
+ *	different timings can still be chosen for each drive.  We could
+ *	set the appropriate timing bits on the fly, but that might be
+ *	a bit confusing.  So, for now we statically handle this requirement
+ *	by looking at our mate drive to see what it is capable of, before
+ *	choosing a mode for our own drive.
+ *
+ *	Note: This relies on the fact we never fail from UDMA to MWDMA2
+ *	but instead drop to PIO.
+ */
+
+static u8 cs5530_udma_filter(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	ide_drive_t *mate = ide_get_pair_dev(drive);
+	u16 *mateid;
+	u8 mask = hwif->ultra_mask;
+
+	if (mate == NULL)
+		goto out;
+	mateid = mate->id;
+
+	if (ata_id_has_dma(mateid) && __ide_dma_bad_drive(mate) == 0) {
+		if ((mateid[ATA_ID_FIELD_VALID] & 4) &&
+		    (mateid[ATA_ID_UDMA_MODES] & 7))
+			goto out;
+		if (mateid[ATA_ID_MWDMA_MODES] & 7)
+			mask = 0;
+	}
+out:
+	return mask;
+}
+
+static void cs5530_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long basereg;
+	unsigned int reg, timings = 0;
+
+	switch (drive->dma_mode) {
+		case XFER_UDMA_0:	timings = 0x00921250; break;
+		case XFER_UDMA_1:	timings = 0x00911140; break;
+		case XFER_UDMA_2:	timings = 0x00911030; break;
+		case XFER_MW_DMA_0:	timings = 0x00077771; break;
+		case XFER_MW_DMA_1:	timings = 0x00012121; break;
+		case XFER_MW_DMA_2:	timings = 0x00002020; break;
+	}
+	basereg = CS5530_BASEREG(hwif);
+	reg = inl(basereg + 4);			/* get drive0 config register */
+	timings |= reg & 0x80000000;		/* preserve PIO format bit */
+	if ((drive-> dn & 1) == 0) {		/* are we configuring drive0? */
+		outl(timings, basereg + 4);	/* write drive0 config register */
+	} else {
+		if (timings & 0x00100000)
+			reg |=  0x00100000;	/* enable UDMA timings for both drives */
+		else
+			reg &= ~0x00100000;	/* disable UDMA timings for both drives */
+		outl(reg, basereg + 4);		/* write drive0 config register */
+		outl(timings, basereg + 12);	/* write drive1 config register */
+	}
+}
+
+/**
+ *	init_chipset_5530	-	set up 5530 bridge
+ *	@dev: PCI device
+ *
+ *	Initialize the cs5530 bridge for reliable IDE DMA operation.
+ */
+
+static int init_chipset_cs5530(struct pci_dev *dev)
+{
+	struct pci_dev *master_0 = NULL, *cs5530_0 = NULL;
+
+	if (pci_resource_start(dev, 4) == 0)
+		return -EFAULT;
+
+	dev = NULL;
+	while ((dev = pci_get_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) {
+		switch (dev->device) {
+			case PCI_DEVICE_ID_CYRIX_PCI_MASTER:
+				master_0 = pci_dev_get(dev);
+				break;
+			case PCI_DEVICE_ID_CYRIX_5530_LEGACY:
+				cs5530_0 = pci_dev_get(dev);
+				break;
+		}
+	}
+	if (!master_0) {
+		printk(KERN_ERR DRV_NAME ": unable to locate PCI MASTER function\n");
+		goto out;
+	}
+	if (!cs5530_0) {
+		printk(KERN_ERR DRV_NAME ": unable to locate CS5530 LEGACY function\n");
+		goto out;
+	}
+
+	/*
+	 * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530:
+	 * -->  OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530
+	 */
+
+	pci_set_master(cs5530_0);
+	pci_try_set_mwi(cs5530_0);
+
+	/*
+	 * Set PCI CacheLineSize to 16-bytes:
+	 * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530
+	 */
+
+	pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04);
+
+	/*
+	 * Disable trapping of UDMA register accesses (Win98 hack):
+	 * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530
+	 */
+
+	pci_write_config_word(cs5530_0, 0xd0, 0x5006);
+
+	/*
+	 * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus:
+	 * The other settings are what is necessary to get the register
+	 * into a sane state for IDE DMA operation.
+	 */
+
+	pci_write_config_byte(master_0, 0x40, 0x1e);
+
+	/* 
+	 * Set max PCI burst size (16-bytes seems to work best):
+	 *	   16bytes: set bit-1 at 0x41 (reg value of 0x16)
+	 *	all others: clear bit-1 at 0x41, and do:
+	 *	  128bytes: OR 0x00 at 0x41
+	 *	  256bytes: OR 0x04 at 0x41
+	 *	  512bytes: OR 0x08 at 0x41
+	 *	 1024bytes: OR 0x0c at 0x41
+	 */
+
+	pci_write_config_byte(master_0, 0x41, 0x14);
+
+	/*
+	 * These settings are necessary to get the chip
+	 * into a sane state for IDE DMA operation.
+	 */
+
+	pci_write_config_byte(master_0, 0x42, 0x00);
+	pci_write_config_byte(master_0, 0x43, 0xc1);
+
+out:
+	pci_dev_put(master_0);
+	pci_dev_put(cs5530_0);
+	return 0;
+}
+
+/**
+ *	init_hwif_cs5530	-	initialise an IDE channel
+ *	@hwif: IDE to initialize
+ *
+ *	This gets invoked by the IDE driver once for each channel. It
+ *	performs channel-specific pre-initialization before drive probing.
+ */
+
+static void init_hwif_cs5530 (ide_hwif_t *hwif)
+{
+	unsigned long basereg;
+	u32 d0_timings;
+
+	basereg = CS5530_BASEREG(hwif);
+	d0_timings = inl(basereg + 0);
+	if (CS5530_BAD_PIO(d0_timings))
+		outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 0);
+	if (CS5530_BAD_PIO(inl(basereg + 8)))
+		outl(cs5530_pio_timings[(d0_timings >> 31) & 1][0], basereg + 8);
+}
+
+static const struct ide_port_ops cs5530_port_ops = {
+	.set_pio_mode		= cs5530_set_pio_mode,
+	.set_dma_mode		= cs5530_set_dma_mode,
+	.udma_filter		= cs5530_udma_filter,
+};
+
+static const struct ide_port_info cs5530_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_cs5530,
+	.init_hwif	= init_hwif_cs5530,
+	.port_ops	= &cs5530_port_ops,
+	.host_flags	= IDE_HFLAG_SERIALIZE |
+			  IDE_HFLAG_POST_SET_MODE,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA2,
+};
+
+static int cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &cs5530_chipset, NULL);
+}
+
+static const struct pci_device_id cs5530_pci_tbl[] = {
+	{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl);
+
+static struct pci_driver cs5530_pci_driver = {
+	.name		= "CS5530 IDE",
+	.id_table	= cs5530_pci_tbl,
+	.probe		= cs5530_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cs5530_ide_init(void)
+{
+	return ide_pci_register_driver(&cs5530_pci_driver);
+}
+
+static void __exit cs5530_ide_exit(void)
+{
+	pci_unregister_driver(&cs5530_pci_driver);
+}
+
+module_init(cs5530_ide_init);
+module_exit(cs5530_ide_exit);
+
+MODULE_AUTHOR("Mark Lord");
+MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cs5535.c b/drivers/ide/cs5535.c
new file mode 100644
index 000000000..70fdbe316
--- /dev/null
+++ b/drivers/ide/cs5535.c
@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2004-2005 Advanced Micro Devices, Inc.
+ * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
+ *
+ * History:
+ * 09/20/2005 - Jaya Kumar <jayakumar.ide@gmail.com>
+ * - Reworked tuneproc, set_drive, misc mods to prep for mainline
+ * - Work was sponsored by CIS (M) Sdn Bhd.
+ * Ported to Kernel 2.6.11 on June 26, 2005 by
+ *   Wolfgang Zuleger <wolfgang.zuleger@gmx.de>
+ *   Alexander Kiausch <alex.kiausch@t-online.de>
+ * Originally developed by AMD for 2.4/2.6
+ *
+ * Development of this chipset driver was funded
+ * by the nice folks at National Semiconductor/AMD.
+ *
+ * Documentation:
+ *  CS5535 documentation available from AMD
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#define DRV_NAME "cs5535"
+
+#define MSR_ATAC_BASE		0x51300000
+#define ATAC_GLD_MSR_CAP	(MSR_ATAC_BASE+0)
+#define ATAC_GLD_MSR_CONFIG	(MSR_ATAC_BASE+0x01)
+#define ATAC_GLD_MSR_SMI	(MSR_ATAC_BASE+0x02)
+#define ATAC_GLD_MSR_ERROR	(MSR_ATAC_BASE+0x03)
+#define ATAC_GLD_MSR_PM		(MSR_ATAC_BASE+0x04)
+#define ATAC_GLD_MSR_DIAG	(MSR_ATAC_BASE+0x05)
+#define ATAC_IO_BAR		(MSR_ATAC_BASE+0x08)
+#define ATAC_RESET		(MSR_ATAC_BASE+0x10)
+#define ATAC_CH0D0_PIO		(MSR_ATAC_BASE+0x20)
+#define ATAC_CH0D0_DMA		(MSR_ATAC_BASE+0x21)
+#define ATAC_CH0D1_PIO		(MSR_ATAC_BASE+0x22)
+#define ATAC_CH0D1_DMA		(MSR_ATAC_BASE+0x23)
+#define ATAC_PCI_ABRTERR	(MSR_ATAC_BASE+0x24)
+#define ATAC_BM0_CMD_PRIM	0x00
+#define ATAC_BM0_STS_PRIM	0x02
+#define ATAC_BM0_PRD		0x04
+#define CS5535_CABLE_DETECT	0x48
+
+/* Format I PIO settings. We separate out cmd and data for safer timings */
+
+static unsigned int cs5535_pio_cmd_timings[5] =
+{ 0xF7F4, 0x53F3, 0x13F1, 0x5131, 0x1131 };
+static unsigned int cs5535_pio_dta_timings[5] =
+{ 0xF7F4, 0xF173, 0x8141, 0x5131, 0x1131 };
+
+static unsigned int cs5535_mwdma_timings[3] =
+{ 0x7F0FFFF3, 0x7F035352, 0x7f024241 };
+
+static unsigned int cs5535_udma_timings[5] =
+{ 0x7F7436A1, 0x7F733481, 0x7F723261, 0x7F713161, 0x7F703061 };
+
+/* Macros to check if the register is the reset value -  reset value is an
+   invalid timing and indicates the register has not been set previously */
+
+#define CS5535_BAD_PIO(timings) ( (timings&~0x80000000UL) == 0x00009172 )
+#define CS5535_BAD_DMA(timings) ( (timings & 0x000FFFFF) == 0x00077771 )
+
+/****
+ *	cs5535_set_speed         -     Configure the chipset to the new speed
+ *	@drive: Drive to set up
+ *	@speed: desired speed
+ *
+ *	cs5535_set_speed() configures the chipset to a new speed.
+ */
+static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
+{
+	u32 reg = 0, dummy;
+	u8 unit = drive->dn & 1;
+
+	/* Set the PIO timings */
+	if (speed < XFER_SW_DMA_0) {
+		ide_drive_t *pair = ide_get_pair_dev(drive);
+		u8 cmd, pioa;
+
+		cmd = pioa = speed - XFER_PIO_0;
+
+		if (pair) {
+			u8 piob = pair->pio_mode - XFER_PIO_0;
+
+			if (piob < cmd)
+				cmd = piob;
+		}
+
+		/* Write the speed of the current drive */
+		reg = (cs5535_pio_cmd_timings[cmd] << 16) |
+			cs5535_pio_dta_timings[pioa];
+		wrmsr(unit ? ATAC_CH0D1_PIO : ATAC_CH0D0_PIO, reg, 0);
+
+		/* And if nessesary - change the speed of the other drive */
+		rdmsr(unit ?  ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, dummy);
+
+		if (((reg >> 16) & cs5535_pio_cmd_timings[cmd]) !=
+			cs5535_pio_cmd_timings[cmd]) {
+			reg &= 0x0000FFFF;
+			reg |= cs5535_pio_cmd_timings[cmd] << 16;
+			wrmsr(unit ? ATAC_CH0D0_PIO : ATAC_CH0D1_PIO, reg, 0);
+		}
+
+		/* Set bit 31 of the DMA register for PIO format 1 timings */
+		rdmsr(unit ?  ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
+		wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA,
+					reg | 0x80000000UL, 0);
+	} else {
+		rdmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, dummy);
+
+		reg &= 0x80000000UL;  /* Preserve the PIO format bit */
+
+		if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
+			reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
+		else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
+			reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];
+		else
+			return;
+
+		wrmsr(unit ? ATAC_CH0D1_DMA : ATAC_CH0D0_DMA, reg, 0);
+	}
+}
+
+/**
+ *	cs5535_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Programs the chipset for DMA mode.
+ */
+
+static void cs5535_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	cs5535_set_speed(drive, drive->dma_mode);
+}
+
+/**
+ *	cs5535_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	A callback from the upper layers for PIO-only tuning.
+ */
+
+static void cs5535_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	cs5535_set_speed(drive, drive->pio_mode);
+}
+
+static u8 cs5535_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 bit;
+
+	/* if a 80 wire cable was detected */
+	pci_read_config_byte(dev, CS5535_CABLE_DETECT, &bit);
+
+	return (bit & 1) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops cs5535_port_ops = {
+	.set_pio_mode		= cs5535_set_pio_mode,
+	.set_dma_mode		= cs5535_set_dma_mode,
+	.cable_detect		= cs5535_cable_detect,
+};
+
+static const struct ide_port_info cs5535_chipset = {
+	.name		= DRV_NAME,
+	.port_ops	= &cs5535_port_ops,
+	.host_flags	= IDE_HFLAG_SINGLE | IDE_HFLAG_POST_SET_MODE,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA4,
+};
+
+static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &cs5535_chipset, NULL);
+}
+
+static const struct pci_device_id cs5535_pci_tbl[] = {
+	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_CS5535_IDE), 0 },
+	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5535_IDE), },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, cs5535_pci_tbl);
+
+static struct pci_driver cs5535_pci_driver = {
+	.name		= "CS5535_IDE",
+	.id_table	= cs5535_pci_tbl,
+	.probe		= cs5535_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cs5535_ide_init(void)
+{
+	return ide_pci_register_driver(&cs5535_pci_driver);
+}
+
+static void __exit cs5535_ide_exit(void)
+{
+	pci_unregister_driver(&cs5535_pci_driver);
+}
+
+module_init(cs5535_ide_init);
+module_exit(cs5535_ide_exit);
+
+MODULE_AUTHOR("AMD");
+MODULE_DESCRIPTION("PCI driver module for AMD/NS CS5535 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/cs5536.c b/drivers/ide/cs5536.c
new file mode 100644
index 000000000..8b5ca1451
--- /dev/null
+++ b/drivers/ide/cs5536.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * CS5536 PATA support
+ * (C) 2007 Martin K. Petersen <mkp@mkp.net>
+ * (C) 2009 Bartlomiej Zolnierkiewicz
+ *
+ * Documentation:
+ *	Available from AMD web site.
+ *
+ * The IDE timing registers for the CS5536 live in the Geode Machine
+ * Specific Register file and not PCI config space.  Most BIOSes
+ * virtualize the PCI registers so the chip looks like a standard IDE
+ * controller.  Unfortunately not all implementations get this right.
+ * In particular some have problems with unaligned accesses to the
+ * virtualized PCI registers.  This driver always does full dword
+ * writes to work around the issue.  Also, in case of a bad BIOS this
+ * driver can be loaded with the "msr=1" parameter which forces using
+ * the Machine Specific Registers to configure the device.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <asm/msr.h>
+
+#define DRV_NAME	"cs5536"
+
+enum {
+	MSR_IDE_CFG		= 0x51300010,
+	PCI_IDE_CFG		= 0x40,
+
+	CFG			= 0,
+	DTC			= 2,
+	CAST			= 3,
+	ETC			= 4,
+
+	IDE_CFG_CHANEN		= (1 << 1),
+	IDE_CFG_CABLE		= (1 << 17) | (1 << 16),
+
+	IDE_D0_SHIFT		= 24,
+	IDE_D1_SHIFT		= 16,
+	IDE_DRV_MASK		= 0xff,
+
+	IDE_CAST_D0_SHIFT	= 6,
+	IDE_CAST_D1_SHIFT	= 4,
+	IDE_CAST_DRV_MASK	= 0x3,
+
+	IDE_CAST_CMD_SHIFT	= 24,
+	IDE_CAST_CMD_MASK	= 0xff,
+
+	IDE_ETC_UDMA_MASK	= 0xc0,
+};
+
+static int use_msr;
+
+static int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
+{
+	if (unlikely(use_msr)) {
+		u32 dummy;
+
+		rdmsr(MSR_IDE_CFG + reg, *val, dummy);
+		return 0;
+	}
+
+	return pci_read_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static int cs5536_write(struct pci_dev *pdev, int reg, int val)
+{
+	if (unlikely(use_msr)) {
+		wrmsr(MSR_IDE_CFG + reg, val, 0);
+		return 0;
+	}
+
+	return pci_write_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static void cs5536_program_dtc(ide_drive_t *drive, u8 tim)
+{
+	struct pci_dev *pdev = to_pci_dev(drive->hwif->dev);
+	int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+	u32 dtc;
+
+	cs5536_read(pdev, DTC, &dtc);
+	dtc &= ~(IDE_DRV_MASK << dshift);
+	dtc |= tim << dshift;
+	cs5536_write(pdev, DTC, dtc);
+}
+
+/**
+ *	cs5536_cable_detect	-	detect cable type
+ *	@hwif: Port to detect on
+ *
+ *	Perform cable detection for ATA66 capable cable.
+ *
+ *	Returns a cable type.
+ */
+
+static u8 cs5536_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	u32 cfg;
+
+	cs5536_read(pdev, CFG, &cfg);
+
+	if (cfg & IDE_CFG_CABLE)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+/**
+ *	cs5536_set_pio_mode		-	PIO timing setup
+ *	@hwif: ATA port
+ *	@drive: ATA device
+ */
+
+static void cs5536_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u8 drv_timings[5] = {
+		0x98, 0x55, 0x32, 0x21, 0x20,
+	};
+
+	static const u8 addr_timings[5] = {
+		0x2, 0x1, 0x0, 0x0, 0x0,
+	};
+
+	static const u8 cmd_timings[5] = {
+		0x99, 0x92, 0x90, 0x22, 0x20,
+	};
+
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	int cshift = (drive->dn & 1) ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+	u32 cast;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	u8 cmd_pio = pio;
+
+	if (pair)
+		cmd_pio = min_t(u8, pio, pair->pio_mode - XFER_PIO_0);
+
+	timings &= (IDE_DRV_MASK << 8);
+	timings |= drv_timings[pio];
+	ide_set_drivedata(drive, (void *)timings);
+
+	cs5536_program_dtc(drive, drv_timings[pio]);
+
+	cs5536_read(pdev, CAST, &cast);
+
+	cast &= ~(IDE_CAST_DRV_MASK << cshift);
+	cast |= addr_timings[pio] << cshift;
+
+	cast &= ~(IDE_CAST_CMD_MASK << IDE_CAST_CMD_SHIFT);
+	cast |= cmd_timings[cmd_pio] << IDE_CAST_CMD_SHIFT;
+
+	cs5536_write(pdev, CAST, cast);
+}
+
+/**
+ *	cs5536_set_dma_mode		-	DMA timing setup
+ *	@hwif: ATA port
+ *	@drive: ATA device
+ */
+
+static void cs5536_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u8 udma_timings[6] = {
+		0xc2, 0xc1, 0xc0, 0xc4, 0xc5, 0xc6,
+	};
+
+	static const u8 mwdma_timings[3] = {
+		0x67, 0x21, 0x20,
+	};
+
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	int dshift = (drive->dn & 1) ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+	u32 etc;
+	const u8 mode = drive->dma_mode;
+
+	cs5536_read(pdev, ETC, &etc);
+
+	if (mode >= XFER_UDMA_0) {
+		etc &= ~(IDE_DRV_MASK << dshift);
+		etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
+	} else { /* MWDMA */
+		etc &= ~(IDE_ETC_UDMA_MASK << dshift);
+		timings &= IDE_DRV_MASK;
+		timings |= mwdma_timings[mode - XFER_MW_DMA_0] << 8;
+		ide_set_drivedata(drive, (void *)timings);
+	}
+
+	cs5536_write(pdev, ETC, etc);
+}
+
+static void cs5536_dma_start(ide_drive_t *drive)
+{
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+
+	if (drive->current_speed < XFER_UDMA_0 &&
+	    (timings >> 8) != (timings & IDE_DRV_MASK))
+		cs5536_program_dtc(drive, timings >> 8);
+
+	ide_dma_start(drive);
+}
+
+static int cs5536_dma_end(ide_drive_t *drive)
+{
+	int ret = ide_dma_end(drive);
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+
+	if (drive->current_speed < XFER_UDMA_0 &&
+	    (timings >> 8) != (timings & IDE_DRV_MASK))
+		cs5536_program_dtc(drive, timings & IDE_DRV_MASK);
+
+	return ret;
+}
+
+static const struct ide_port_ops cs5536_port_ops = {
+	.set_pio_mode		= cs5536_set_pio_mode,
+	.set_dma_mode		= cs5536_set_dma_mode,
+	.cable_detect		= cs5536_cable_detect,
+};
+
+static const struct ide_dma_ops cs5536_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= cs5536_dma_start,
+	.dma_end		= cs5536_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info cs5536_info = {
+	.name		= DRV_NAME,
+	.port_ops	= &cs5536_port_ops,
+	.dma_ops	= &cs5536_dma_ops,
+	.host_flags	= IDE_HFLAG_SINGLE,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA5,
+};
+
+/**
+ *	cs5536_init_one
+ *	@dev: PCI device
+ *	@id: Entry in match table
+ */
+
+static int cs5536_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	u32 cfg;
+
+	if (use_msr)
+		printk(KERN_INFO DRV_NAME ": Using MSR regs instead of PCI\n");
+
+	cs5536_read(dev, CFG, &cfg);
+
+	if ((cfg & IDE_CFG_CHANEN) == 0) {
+		printk(KERN_ERR DRV_NAME ": disabled by BIOS\n");
+		return -ENODEV;
+	}
+
+	return ide_pci_init_one(dev, &cs5536_info, NULL);
+}
+
+static const struct pci_device_id cs5536_pci_tbl[] = {
+	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5536_IDE), },
+	{ },
+};
+
+static struct pci_driver cs5536_pci_driver = {
+	.name		= DRV_NAME,
+	.id_table	= cs5536_pci_tbl,
+	.probe		= cs5536_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+module_pci_driver(cs5536_pci_driver);
+
+MODULE_AUTHOR("Martin K. Petersen, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("low-level driver for the CS5536 IDE controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, cs5536_pci_tbl);
+
+module_param_named(msr, use_msr, int, 0644);
+MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
diff --git a/drivers/ide/cy82c693.c b/drivers/ide/cy82c693.c
new file mode 100644
index 000000000..bc01660ee
--- /dev/null
+++ b/drivers/ide/cy82c693.c
@@ -0,0 +1,234 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1998-2000 Andreas S. Krebs (akrebs@altavista.net), Maintainer
+ *  Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>, Integrator
+ *  Copyright (C) 2007-2011 Bartlomiej Zolnierkiewicz
+ *
+ * CYPRESS CY82C693 chipset IDE controller
+ *
+ * The CY82C693 chipset is used on Digital's PC-Alpha 164SX boards.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "cy82c693"
+
+/*
+ *	NOTE: the value for busmaster timeout is tricky and I got it by
+ *	trial and error!  By using a to low value will cause DMA timeouts
+ *	and drop IDE performance, and by using a to high value will cause
+ *	audio playback to scatter.
+ *	If you know a better value or how to calc it, please let me know.
+ */
+
+/* twice the value written in cy82c693ub datasheet */
+#define BUSMASTER_TIMEOUT	0x50
+/*
+ * the value above was tested on my machine and it seems to work okay
+ */
+
+/* here are the offset definitions for the registers */
+#define CY82_IDE_CMDREG		0x04
+#define CY82_IDE_ADDRSETUP	0x48
+#define CY82_IDE_MASTER_IOR	0x4C
+#define CY82_IDE_MASTER_IOW	0x4D
+#define CY82_IDE_SLAVE_IOR	0x4E
+#define CY82_IDE_SLAVE_IOW	0x4F
+#define CY82_IDE_MASTER_8BIT	0x50
+#define CY82_IDE_SLAVE_8BIT	0x51
+
+#define CY82_INDEX_PORT		0x22
+#define CY82_DATA_PORT		0x23
+
+#define CY82_INDEX_CHANNEL0	0x30
+#define CY82_INDEX_CHANNEL1	0x31
+#define CY82_INDEX_TIMEOUT	0x32
+
+/*
+ * set DMA mode a specific channel for CY82C693
+ */
+
+static void cy82c693_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 mode = drive->dma_mode;
+	u8 single = (mode & 0x10) >> 4, index = 0, data = 0;
+
+	index = hwif->channel ? CY82_INDEX_CHANNEL1 : CY82_INDEX_CHANNEL0;
+
+	data = (mode & 3) | (single << 2);
+
+	outb(index, CY82_INDEX_PORT);
+	outb(data, CY82_DATA_PORT);
+
+	/*
+	 * note: below we set the value for Bus Master IDE TimeOut Register
+	 * I'm not absolutely sure what this does, but it solved my problem
+	 * with IDE DMA and sound, so I now can play sound and work with
+	 * my IDE driver at the same time :-)
+	 *
+	 * If you know the correct (best) value for this register please
+	 * let me know - ASK
+	 */
+
+	data = BUSMASTER_TIMEOUT;
+	outb(CY82_INDEX_TIMEOUT, CY82_INDEX_PORT);
+	outb(data, CY82_DATA_PORT);
+}
+
+static void cy82c693_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
+	const unsigned long T = 1000000 / bus_speed;
+	unsigned int addrCtrl;
+	struct ide_timing t;
+	u8 time_16, time_8;
+
+	/* select primary or secondary channel */
+	if (drive->dn > 1) {  /* drive is on the secondary channel */
+		dev = pci_get_slot(dev->bus, dev->devfn+1);
+		if (!dev) {
+			printk(KERN_ERR "%s: tune_drive: "
+				"Cannot find secondary interface!\n",
+				drive->name);
+			return;
+		}
+	}
+
+	ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
+
+	time_16 = clamp_val(t.recover - 1, 0, 15) |
+		  (clamp_val(t.active - 1, 0, 15) << 4);
+	time_8 = clamp_val(t.act8b - 1, 0, 15) |
+		 (clamp_val(t.rec8b - 1, 0, 15) << 4);
+
+	/* now let's write  the clocks registers */
+	if ((drive->dn & 1) == 0) {
+		/*
+		 * set master drive
+		 * address setup control register
+		 * is 32 bit !!!
+		 */
+		pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
+
+		addrCtrl &= (~0xF);
+		addrCtrl |= clamp_val(t.setup - 1, 0, 15);
+		pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
+
+		/* now let's set the remaining registers */
+		pci_write_config_byte(dev, CY82_IDE_MASTER_IOR, time_16);
+		pci_write_config_byte(dev, CY82_IDE_MASTER_IOW, time_16);
+		pci_write_config_byte(dev, CY82_IDE_MASTER_8BIT, time_8);
+	} else {
+		/*
+		 * set slave drive
+		 * address setup control register
+		 * is 32 bit !!!
+		 */
+		pci_read_config_dword(dev, CY82_IDE_ADDRSETUP, &addrCtrl);
+
+		addrCtrl &= (~0xF0);
+		addrCtrl |= (clamp_val(t.setup - 1, 0, 15) << 4);
+		pci_write_config_dword(dev, CY82_IDE_ADDRSETUP, addrCtrl);
+
+		/* now let's set the remaining registers */
+		pci_write_config_byte(dev, CY82_IDE_SLAVE_IOR, time_16);
+		pci_write_config_byte(dev, CY82_IDE_SLAVE_IOW, time_16);
+		pci_write_config_byte(dev, CY82_IDE_SLAVE_8BIT, time_8);
+	}
+	if (drive->dn > 1)
+		pci_dev_put(dev);
+}
+
+static void init_iops_cy82c693(ide_hwif_t *hwif)
+{
+	static ide_hwif_t *primary;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	if (PCI_FUNC(dev->devfn) == 1)
+		primary = hwif;
+	else {
+		hwif->mate = primary;
+		hwif->channel = 1;
+	}
+}
+
+static const struct ide_port_ops cy82c693_port_ops = {
+	.set_pio_mode		= cy82c693_set_pio_mode,
+	.set_dma_mode		= cy82c693_set_dma_mode,
+};
+
+static const struct ide_port_info cy82c693_chipset = {
+	.name		= DRV_NAME,
+	.init_iops	= init_iops_cy82c693,
+	.port_ops	= &cy82c693_port_ops,
+	.host_flags	= IDE_HFLAG_SINGLE,
+	.pio_mask	= ATA_PIO4,
+	.swdma_mask	= ATA_SWDMA2,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+static int cy82c693_init_one(struct pci_dev *dev,
+			     const struct pci_device_id *id)
+{
+	struct pci_dev *dev2;
+	int ret = -ENODEV;
+
+	/* CY82C693 is more than only a IDE controller.
+	   Function 1 is primary IDE channel, function 2 - secondary. */
+	if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
+	    PCI_FUNC(dev->devfn) == 1) {
+		dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
+		ret = ide_pci_init_two(dev, dev2, &cy82c693_chipset, NULL);
+		if (ret)
+			pci_dev_put(dev2);
+	}
+	return ret;
+}
+
+static void cy82c693_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
+
+	ide_pci_remove(dev);
+	pci_dev_put(dev2);
+}
+
+static const struct pci_device_id cy82c693_pci_tbl[] = {
+	{ PCI_VDEVICE(CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, cy82c693_pci_tbl);
+
+static struct pci_driver cy82c693_pci_driver = {
+	.name		= "Cypress_IDE",
+	.id_table	= cy82c693_pci_tbl,
+	.probe		= cy82c693_init_one,
+	.remove		= cy82c693_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init cy82c693_ide_init(void)
+{
+	return ide_pci_register_driver(&cy82c693_pci_driver);
+}
+
+static void __exit cy82c693_ide_exit(void)
+{
+	pci_unregister_driver(&cy82c693_pci_driver);
+}
+
+module_init(cy82c693_ide_init);
+module_exit(cy82c693_ide_exit);
+
+MODULE_AUTHOR("Andreas Krebs, Andre Hedrick, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for the Cypress CY82C693 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/delkin_cb.c b/drivers/ide/delkin_cb.c
new file mode 100644
index 000000000..300daabaa
--- /dev/null
+++ b/drivers/ide/delkin_cb.c
@@ -0,0 +1,181 @@
+/*
+ *  Created 20 Oct 2004 by Mark Lord
+ *
+ *  Basic support for Delkin/ASKA/Workbit Cardbus CompactFlash adapter
+ *
+ *  Modeled after the 16-bit PCMCIA driver: ide-cs.c
+ *
+ *  This is slightly peculiar, in that it is a PCI driver,
+ *  but is NOT an IDE PCI driver -- the IDE layer does not directly
+ *  support hot insertion/removal of PCI interfaces, so this driver
+ *  is unable to use the IDE PCI interfaces.  Instead, it uses the
+ *  same interfaces as the ide-cs (PCMCIA) driver uses.
+ *  On the plus side, the driver is also smaller/simpler this way.
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+
+#include <asm/io.h>
+
+/*
+ * No chip documentation has yet been found,
+ * so these configuration values were pulled from
+ * a running Win98 system using "debug".
+ * This gives around 3MByte/second read performance,
+ * which is about 2/3 of what the chip is capable of.
+ *
+ * There is also a 4KByte mmio region on the card,
+ * but its purpose has yet to be reverse-engineered.
+ */
+static const u8 setup[] = {
+	0x00, 0x05, 0xbe, 0x01, 0x20, 0x8f, 0x00, 0x00,
+	0xa4, 0x1f, 0xb3, 0x1b, 0x00, 0x00, 0x00, 0x80,
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00, 0xa4, 0x83, 0x02, 0x13,
+};
+
+static const struct ide_port_ops delkin_cb_port_ops = {
+	.quirkproc		= ide_undecoded_slave,
+};
+
+static int delkin_cb_init_chipset(struct pci_dev *dev)
+{
+	unsigned long base = pci_resource_start(dev, 0);
+	int i;
+
+	outb(0x02, base + 0x1e);	/* set nIEN to block interrupts */
+	inb(base + 0x17);		/* read status to clear interrupts */
+
+	for (i = 0; i < sizeof(setup); ++i) {
+		if (setup[i])
+			outb(setup[i], base + i);
+	}
+
+	return 0;
+}
+
+static const struct ide_port_info delkin_cb_port_info = {
+	.port_ops		= &delkin_cb_port_ops,
+	.host_flags		= IDE_HFLAG_IO_32BIT | IDE_HFLAG_UNMASK_IRQS |
+				  IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.init_chipset		= delkin_cb_init_chipset,
+	.chipset		= ide_pci,
+};
+
+static int delkin_cb_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_host *host;
+	unsigned long base;
+	int rc;
+	struct ide_hw hw, *hws[] = { &hw };
+
+	rc = pci_enable_device(dev);
+	if (rc) {
+		printk(KERN_ERR "delkin_cb: pci_enable_device failed (%d)\n", rc);
+		return rc;
+	}
+	rc = pci_request_regions(dev, "delkin_cb");
+	if (rc) {
+		printk(KERN_ERR "delkin_cb: pci_request_regions failed (%d)\n", rc);
+		pci_disable_device(dev);
+		return rc;
+	}
+	base = pci_resource_start(dev, 0);
+
+	delkin_cb_init_chipset(dev);
+
+	memset(&hw, 0, sizeof(hw));
+	ide_std_init_ports(&hw, base + 0x10, base + 0x1e);
+	hw.irq = dev->irq;
+	hw.dev = &dev->dev;
+
+	rc = ide_host_add(&delkin_cb_port_info, hws, 1, &host);
+	if (rc)
+		goto out_disable;
+
+	pci_set_drvdata(dev, host);
+
+	return 0;
+
+out_disable:
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+	return rc;
+}
+
+static void
+delkin_cb_remove (struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+
+	ide_host_remove(host);
+
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+}
+
+#ifdef CONFIG_PM
+static int delkin_cb_suspend(struct pci_dev *dev, pm_message_t state)
+{
+	pci_save_state(dev);
+	pci_disable_device(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+
+	return 0;
+}
+
+static int delkin_cb_resume(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	int rc;
+
+	pci_set_power_state(dev, PCI_D0);
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	pci_restore_state(dev);
+	pci_set_master(dev);
+
+	if (host->init_chipset)
+		host->init_chipset(dev);
+
+	return 0;
+}
+#else
+#define delkin_cb_suspend NULL
+#define delkin_cb_resume NULL
+#endif
+
+static struct pci_device_id delkin_cb_pci_tbl[] = {
+	{ 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);
+
+static struct pci_driver delkin_cb_pci_driver = {
+	.name		= "Delkin-ASKA-Workbit Cardbus IDE",
+	.id_table	= delkin_cb_pci_tbl,
+	.probe		= delkin_cb_probe,
+	.remove		= delkin_cb_remove,
+	.suspend	= delkin_cb_suspend,
+	.resume		= delkin_cb_resume,
+};
+
+module_pci_driver(delkin_cb_pci_driver);
+
+MODULE_AUTHOR("Mark Lord");
+MODULE_DESCRIPTION("Basic support for Delkin/ASKA/Workbit Cardbus IDE");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/ide/dtc2278.c b/drivers/ide/dtc2278.c
new file mode 100644
index 000000000..714e8cd0f
--- /dev/null
+++ b/drivers/ide/dtc2278.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1996  Linus Torvalds & author (see below)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "dtc2278"
+
+/*
+ * Changing this #undef to #define may solve start up problems in some systems.
+ */
+#undef ALWAYS_SET_DTC2278_PIO_MODE
+
+/*
+ * From: andy@cercle.cts.com (Dyan Wile)
+ *
+ * Below is a patch for DTC-2278 - alike software-programmable controllers
+ * The code enables the secondary IDE controller and the PIO4 (3?) timings on
+ * the primary (EIDE). You may probably have to enable the 32-bit support to
+ * get the full speed. You better get the disk interrupts disabled ( hdparm -u0
+ * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
+ * filesystem  corrupted with -u1, but under heavy disk load only :-)
+ *
+ * This card is now forced to use the "serialize" feature,
+ * and irq-unmasking is disallowed.  If io_32bit is enabled,
+ * it must be done for BOTH drives on each interface.
+ *
+ * This code was written for the DTC2278E, but might work with any of these:
+ *
+ * DTC2278S has only a single IDE interface.
+ * DTC2278D has two IDE interfaces and is otherwise identical to the S version.
+ * DTC2278E also has serial ports and a printer port
+ * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
+ *
+ * There may be a fourth controller type. The S and D versions use the
+ * Winbond chip, and I think the E version does also.
+ *
+ */
+
+static void sub22 (char b, char c)
+{
+	int i;
+
+	for(i = 0; i < 3; ++i) {
+		inb(0x3f6);
+		outb_p(b,0xb0);
+		inb(0x3f6);
+		outb_p(c,0xb4);
+		inb(0x3f6);
+		if(inb(0xb4) == c) {
+			outb_p(7,0xb0);
+			inb(0x3f6);
+			return;	/* success */
+		}
+	}
+}
+
+static DEFINE_SPINLOCK(dtc2278_lock);
+
+static void dtc2278_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long flags;
+
+	if (drive->pio_mode >= XFER_PIO_3) {
+		spin_lock_irqsave(&dtc2278_lock, flags);
+		/*
+		 * This enables PIO mode4 (3?) on the first interface
+		 */
+		sub22(1,0xc3);
+		sub22(0,0xa0);
+		spin_unlock_irqrestore(&dtc2278_lock, flags);
+	} else {
+		/* we don't know how to set it back again.. */
+		/* Actually we do - there is a data sheet available for the
+		   Winbond but does anyone actually care */
+	}
+}
+
+static const struct ide_port_ops dtc2278_port_ops = {
+	.set_pio_mode		= dtc2278_set_pio_mode,
+};
+
+static const struct ide_port_info dtc2278_port_info __initconst = {
+	.name			= DRV_NAME,
+	.chipset		= ide_dtc2278,
+	.port_ops		= &dtc2278_port_ops,
+	.host_flags		= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_UNMASK_IRQS |
+				  IDE_HFLAG_IO_32BIT |
+				  /* disallow ->io_32bit changes */
+				  IDE_HFLAG_NO_IO_32BIT |
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_DTC2278,
+	.pio_mask		= ATA_PIO4,
+};
+
+static int __init dtc2278_probe(void)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	/*
+	 * This enables the second interface
+	 */
+	outb_p(4,0xb0);
+	inb(0x3f6);
+	outb_p(0x20,0xb4);
+	inb(0x3f6);
+#ifdef ALWAYS_SET_DTC2278_PIO_MODE
+	/*
+	 * This enables PIO mode4 (3?) on the first interface
+	 * and may solve start-up problems for some people.
+	 */
+	sub22(1,0xc3);
+	sub22(0,0xa0);
+#endif
+	local_irq_restore(flags);
+
+	return ide_legacy_device_add(&dtc2278_port_info, 0);
+}
+
+static bool probe_dtc2278;
+
+module_param_named(probe, probe_dtc2278, bool, 0);
+MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
+
+static int __init dtc2278_init(void)
+{
+	if (probe_dtc2278 == 0)
+		return -ENODEV;
+
+	if (dtc2278_probe()) {
+		printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
+		return -EBUSY;
+	}
+	return 0;
+}
+
+module_init(dtc2278_init);
+
+MODULE_AUTHOR("See Local File");
+MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
new file mode 100644
index 000000000..607c44bc5
--- /dev/null
+++ b/drivers/ide/falconide.c
@@ -0,0 +1,199 @@
+/*
+ *  Atari Falcon IDE Driver
+ *
+ *     Created 12 Jul 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/atarihw.h>
+#include <asm/atariints.h>
+#include <asm/atari_stdma.h>
+#include <asm/ide.h>
+
+#define DRV_NAME "falconide"
+
+    /*
+     *  Offsets from base address
+     */
+
+#define ATA_HD_CONTROL	0x39
+
+    /*
+     *  falconide_intr_lock is used to obtain access to the IDE interrupt,
+     *  which is shared between several drivers.
+     */
+
+static int falconide_intr_lock;
+
+static void falconide_release_lock(void)
+{
+	if (falconide_intr_lock == 0) {
+		printk(KERN_ERR "%s: bug\n", __func__);
+		return;
+	}
+	falconide_intr_lock = 0;
+	stdma_release();
+}
+
+static void falconide_get_lock(irq_handler_t handler, void *data)
+{
+	if (falconide_intr_lock == 0) {
+		if (in_interrupt() > 0)
+			panic("Falcon IDE hasn't ST-DMA lock in interrupt");
+		stdma_lock(handler, data);
+		falconide_intr_lock = 1;
+	}
+}
+
+static void falconide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
+				 void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_insw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+static void falconide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
+				  void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_outsw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+/* Atari has a byte-swapped IDE interface */
+static const struct ide_tp_ops falconide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= falconide_input_data,
+	.output_data		= falconide_output_data,
+};
+
+static const struct ide_port_info falconide_port_info = {
+	.get_lock		= falconide_get_lock,
+	.release_lock		= falconide_release_lock,
+	.tp_ops			= &falconide_tp_ops,
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+static void __init falconide_setup_ports(struct ide_hw *hw, unsigned long base)
+{
+	int i;
+
+	memset(hw, 0, sizeof(*hw));
+
+	hw->io_ports.data_addr = base;
+
+	for (i = 1; i < 8; i++)
+		hw->io_ports_array[i] = base + 1 + i * 4;
+
+	hw->io_ports.ctl_addr = base + ATA_HD_CONTROL;
+
+	hw->irq = IRQ_MFP_IDE;
+}
+
+    /*
+     *  Probe for a Falcon IDE interface
+     */
+
+static int __init falconide_init(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct ide_host *host;
+	struct ide_hw hw, *hws[] = { &hw };
+	unsigned long base;
+	int rc;
+
+	dev_info(&pdev->dev, "Atari Falcon IDE controller\n");
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), DRV_NAME)) {
+		dev_err(&pdev->dev, "resources busy\n");
+		return -EBUSY;
+	}
+
+	base = (unsigned long)res->start;
+
+	falconide_setup_ports(&hw, base);
+
+	host = ide_host_alloc(&falconide_port_info, hws, 1);
+	if (host == NULL) {
+		rc = -ENOMEM;
+		goto err;
+	}
+
+	falconide_get_lock(NULL, NULL);
+	rc = ide_host_register(host, &falconide_port_info, hws);
+	falconide_release_lock();
+
+	if (rc)
+		goto err_free;
+
+	platform_set_drvdata(pdev, host);
+	return 0;
+err_free:
+	ide_host_free(host);
+err:
+	release_mem_region(res->start, resource_size(res));
+	return rc;
+}
+
+static int falconide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+
+	ide_host_remove(host);
+
+	return 0;
+}
+
+static struct platform_driver ide_falcon_driver = {
+	.remove = falconide_remove,
+	.driver   = {
+		.name	= "atari-falcon-ide",
+	},
+};
+
+module_platform_driver_probe(ide_falcon_driver, falconide_init);
+
+MODULE_AUTHOR("Geert Uytterhoeven");
+MODULE_DESCRIPTION("low-level driver for Atari Falcon IDE");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:atari-falcon-ide");
diff --git a/drivers/ide/gayle.c b/drivers/ide/gayle.c
new file mode 100644
index 000000000..901e6ebfe
--- /dev/null
+++ b/drivers/ide/gayle.c
@@ -0,0 +1,188 @@
+/*
+ *  Amiga Gayle IDE Driver
+ *
+ *     Created 9 Jul 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/zorro.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/amigayle.h>
+
+
+    /*
+     *  Offsets from one of the above bases
+     */
+
+#define GAYLE_CONTROL	0x101a
+
+    /*
+     *  These are at different offsets from the base
+     */
+
+#define GAYLE_IRQ_4000	0xdd3020	/* MSB = 1, Harddisk is source of */
+#define GAYLE_IRQ_1200	0xda9000	/* interrupt */
+
+
+    /*
+     *  Offset of the secondary port for IDE doublers
+     *  Note that GAYLE_CONTROL is NOT available then!
+     */
+
+#define GAYLE_NEXT_PORT	0x1000
+
+#define GAYLE_NUM_HWIFS		2
+#define GAYLE_NUM_PROBE_HWIFS	(ide_doubler ? GAYLE_NUM_HWIFS : \
+					       GAYLE_NUM_HWIFS-1)
+#define GAYLE_HAS_CONTROL_REG	(!ide_doubler)
+
+static bool ide_doubler;
+module_param_named(doubler, ide_doubler, bool, 0);
+MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
+
+    /*
+     *  Check and acknowledge the interrupt status
+     */
+
+static int gayle_test_irq(ide_hwif_t *hwif)
+{
+	unsigned char ch;
+
+	ch = z_readb(hwif->io_ports.irq_addr);
+	if (!(ch & GAYLE_IRQ_IDE))
+		return 0;
+	return 1;
+}
+
+static void gayle_a1200_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	(void)z_readb(hwif->io_ports.status_addr);
+	z_writeb(0x7c, hwif->io_ports.irq_addr);
+}
+
+static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
+				     unsigned long ctl, unsigned long irq_port)
+{
+	int i;
+
+	memset(hw, 0, sizeof(*hw));
+
+	hw->io_ports.data_addr = base;
+
+	for (i = 1; i < 8; i++)
+		hw->io_ports_array[i] = base + 2 + i * 4;
+
+	hw->io_ports.ctl_addr = ctl;
+	hw->io_ports.irq_addr = irq_port;
+
+	hw->irq = IRQ_AMIGA_PORTS;
+}
+
+static const struct ide_port_ops gayle_a4000_port_ops = {
+	.test_irq		= gayle_test_irq,
+};
+
+static const struct ide_port_ops gayle_a1200_port_ops = {
+	.clear_irq		= gayle_a1200_clear_irq,
+	.test_irq		= gayle_test_irq,
+};
+
+static const struct ide_port_info gayle_port_info = {
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+    /*
+     *  Probe for a Gayle IDE interface (and optionally for an IDE doubler)
+     */
+
+static int __init amiga_gayle_ide_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct gayle_ide_platform_data *pdata;
+	unsigned long base, ctrlport, irqport;
+	unsigned int i;
+	int error;
+	struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
+	struct ide_port_info d = gayle_port_info;
+	struct ide_host *host;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!request_mem_region(res->start, resource_size(res), "IDE"))
+		return -EBUSY;
+
+	pdata = dev_get_platdata(&pdev->dev);
+	pr_info("ide: Gayle IDE controller (A%u style%s)\n",
+		pdata->explicit_ack ? 1200 : 4000,
+		ide_doubler ? ", IDE doubler" : "");
+
+	base = (unsigned long)ZTWO_VADDR(pdata->base);
+	ctrlport = 0;
+	irqport = (unsigned long)ZTWO_VADDR(pdata->irqport);
+	if (pdata->explicit_ack)
+		d.port_ops = &gayle_a1200_port_ops;
+	else
+		d.port_ops = &gayle_a4000_port_ops;
+
+	for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++, base += GAYLE_NEXT_PORT) {
+		if (GAYLE_HAS_CONTROL_REG)
+			ctrlport = base + GAYLE_CONTROL;
+
+		gayle_setup_ports(&hw[i], base, ctrlport, irqport);
+		hws[i] = &hw[i];
+	}
+
+	error = ide_host_add(&d, hws, i, &host);
+	if (error)
+		goto out;
+
+	platform_set_drvdata(pdev, host);
+	return 0;
+
+out:
+	release_mem_region(res->start, resource_size(res));
+	return error;
+}
+
+static int __exit amiga_gayle_ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	ide_host_remove(host);
+	release_mem_region(res->start, resource_size(res));
+	return 0;
+}
+
+static struct platform_driver amiga_gayle_ide_driver = {
+	.remove = __exit_p(amiga_gayle_ide_remove),
+	.driver   = {
+		.name	= "amiga-gayle-ide",
+	},
+};
+
+module_platform_driver_probe(amiga_gayle_ide_driver, amiga_gayle_ide_probe);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-gayle-ide");
diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
new file mode 100644
index 000000000..50c9a4146
--- /dev/null
+++ b/drivers/ide/hpt366.c
@@ -0,0 +1,1545 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 1999-2003		Andre Hedrick <andre@linux-ide.org>
+ * Portions Copyright (C) 2001	        Sun Microsystems, Inc.
+ * Portions Copyright (C) 2003		Red Hat Inc
+ * Portions Copyright (C) 2007		Bartlomiej Zolnierkiewicz
+ * Portions Copyright (C) 2005-2009	MontaVista Software, Inc.
+ *
+ * Thanks to HighPoint Technologies for their assistance, and hardware.
+ * Special Thanks to Jon Burchmore in SanDiego for the deep pockets, his
+ * donation of an ABit BP6 mainboard, processor, and memory acellerated
+ * development and support.
+ *
+ *
+ * HighPoint has its own drivers (open source except for the RAID part)
+ * available from http://www.highpoint-tech.com/USA_new/service_support.htm 
+ * This may be useful to anyone wanting to work on this driver, however  do not
+ * trust  them too much since the code tends to become less and less meaningful
+ * as the time passes... :-/
+ *
+ * Note that final HPT370 support was done by force extraction of GPL.
+ *
+ * - add function for getting/setting power status of drive
+ * - the HPT370's state machine can get confused. reset it before each dma 
+ *   xfer to prevent that from happening.
+ * - reset state engine whenever we get an error.
+ * - check for busmaster state at end of dma. 
+ * - use new highpoint timings.
+ * - detect bus speed using highpoint register.
+ * - use pll if we don't have a clock table. added a 66MHz table that's
+ *   just 2x the 33MHz table.
+ * - removed turnaround. NOTE: we never want to switch between pll and
+ *   pci clocks as the chip can glitch in those cases. the highpoint
+ *   approved workaround slows everything down too much to be useful. in
+ *   addition, we would have to serialize access to each chip.
+ * 	Adrian Sun <a.sun@sun.com>
+ *
+ * add drive timings for 66MHz PCI bus,
+ * fix ATA Cable signal detection, fix incorrect /proc info
+ * add /proc display for per-drive PIO/DMA/UDMA mode and
+ * per-channel ATA-33/66 Cable detect.
+ * 	Duncan Laurie <void@sun.com>
+ *
+ * fixup /proc output for multiple controllers
+ *	Tim Hockin <thockin@sun.com>
+ *
+ * On hpt366: 
+ * Reset the hpt366 on error, reset on dma
+ * Fix disabling Fast Interrupt hpt366.
+ * 	Mike Waychison <crlf@sun.com>
+ *
+ * Added support for 372N clocking and clock switching. The 372N needs
+ * different clocks on read/write. This requires overloading rw_disk and
+ * other deeply crazy things. Thanks to <http://www.hoerstreich.de> for
+ * keeping me sane. 
+ *		Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * - fix the clock turnaround code: it was writing to the wrong ports when
+ *   called for the secondary channel, caching the current clock mode per-
+ *   channel caused the cached register value to get out of sync with the
+ *   actual one, the channels weren't serialized, the turnaround shouldn't
+ *   be done on 66 MHz PCI bus
+ * - disable UltraATA/100 for HPT370 by default as the 33 MHz clock being used
+ *   does not allow for this speed anyway
+ * - avoid touching disabled channels (e.g. HPT371/N are single channel chips,
+ *   their primary channel is kind of virtual, it isn't tied to any pins)
+ * - fix/remove bad/unused timing tables and use one set of tables for the whole
+ *   HPT37x chip family; save space by introducing the separate transfer mode
+ *   table in which the mode lookup is done
+ * - use f_CNT value saved by  the HighPoint BIOS as reading it directly gives
+ *   the wrong PCI frequency since DPLL has already been calibrated by BIOS;
+ *   read it only from the function 0 of HPT374 chips
+ * - fix the hotswap code:  it caused RESET- to glitch when tristating the bus,
+ *   and for HPT36x the obsolete HDIO_TRISTATE_HWIF handler was called instead
+ * - pass to init_chipset() handlers a copy of the IDE PCI device structure as
+ *   they tamper with its fields
+ * - pass  to the init_setup handlers a copy of the ide_pci_device_t structure
+ *   since they may tamper with its fields
+ * - prefix the driver startup messages with the real chip name
+ * - claim the extra 240 bytes of I/O space for all chips
+ * - optimize the UltraDMA filtering and the drive list lookup code
+ * - use pci_get_slot() to get to the function 1 of HPT36x/374
+ * - cache offset of the channel's misc. control registers (MCRs) being used
+ *   throughout the driver
+ * - only touch the relevant MCR when detecting the cable type on HPT374's
+ *   function 1
+ * - rename all the register related variables consistently
+ * - move all the interrupt twiddling code from the speedproc handlers into
+ *   init_hwif_hpt366(), also grouping all the DMA related code together there
+ * - merge HPT36x/HPT37x speedproc handlers, fix PIO timing register mask and
+ *   separate the UltraDMA and MWDMA masks there to avoid changing PIO timings
+ *   when setting an UltraDMA mode
+ * - fix hpt3xx_tune_drive() to set the PIO mode requested, not always select
+ *   the best possible one
+ * - clean up DMA timeout handling for HPT370
+ * - switch to using the enumeration type to differ between the numerous chip
+ *   variants, matching PCI device/revision ID with the chip type early, at the
+ *   init_setup stage
+ * - extend the hpt_info structure to hold the DPLL and PCI clock frequencies,
+ *   stop duplicating it for each channel by storing the pointer in the pci_dev
+ *   structure: first, at the init_setup stage, point it to a static "template"
+ *   with only the chip type and its specific base DPLL frequency, the highest
+ *   UltraDMA mode, and the chip settings table pointer filled,  then, at the
+ *   init_chipset stage, allocate per-chip instance  and fill it with the rest
+ *   of the necessary information
+ * - get rid of the constant thresholds in the HPT37x PCI clock detection code,
+ *   switch  to calculating  PCI clock frequency based on the chip's base DPLL
+ *   frequency
+ * - switch to using the  DPLL clock and enable UltraATA/133 mode by default on
+ *   anything  newer than HPT370/A (except HPT374 that is not capable of this
+ *   mode according to the manual)
+ * - fold PCI clock detection and DPLL setup code into init_chipset_hpt366(),
+ *   also fixing the interchanged 25/40 MHz PCI clock cases for HPT36x chips;
+ *   unify HPT36x/37x timing setup code and the speedproc handlers by joining
+ *   the register setting lists into the table indexed by the clock selected
+ * - set the correct hwif->ultra_mask for each individual chip
+ * - add Ultra and MW DMA mode filtering for the HPT37[24] based SATA cards
+ * - stop resetting HPT370's state machine before each DMA transfer as that has
+ *   caused more harm than good
+ *	Sergei Shtylyov, <sshtylyov@ru.mvista.com> or <source@mvista.com>
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <linux/slab.h>
+
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+#define DRV_NAME "hpt366"
+
+/* various tuning parameters */
+#undef	HPT_RESET_STATE_ENGINE
+#undef	HPT_DELAY_INTERRUPT
+
+static const char *bad_ata100_5[] = {
+	"IBM-DTLA-307075",
+	"IBM-DTLA-307060",
+	"IBM-DTLA-307045",
+	"IBM-DTLA-307030",
+	"IBM-DTLA-307020",
+	"IBM-DTLA-307015",
+	"IBM-DTLA-305040",
+	"IBM-DTLA-305030",
+	"IBM-DTLA-305020",
+	"IC35L010AVER07-0",
+	"IC35L020AVER07-0",
+	"IC35L030AVER07-0",
+	"IC35L040AVER07-0",
+	"IC35L060AVER07-0",
+	"WDC AC310200R",
+	NULL
+};
+
+static const char *bad_ata66_4[] = {
+	"IBM-DTLA-307075",
+	"IBM-DTLA-307060",
+	"IBM-DTLA-307045",
+	"IBM-DTLA-307030",
+	"IBM-DTLA-307020",
+	"IBM-DTLA-307015",
+	"IBM-DTLA-305040",
+	"IBM-DTLA-305030",
+	"IBM-DTLA-305020",
+	"IC35L010AVER07-0",
+	"IC35L020AVER07-0",
+	"IC35L030AVER07-0",
+	"IC35L040AVER07-0",
+	"IC35L060AVER07-0",
+	"WDC AC310200R",
+	"MAXTOR STM3320620A",
+	NULL
+};
+
+static const char *bad_ata66_3[] = {
+	"WDC AC310200R",
+	NULL
+};
+
+static const char *bad_ata33[] = {
+	"Maxtor 92720U8", "Maxtor 92040U6", "Maxtor 91360U4", "Maxtor 91020U3", "Maxtor 90845U3", "Maxtor 90650U2",
+	"Maxtor 91360D8", "Maxtor 91190D7", "Maxtor 91020D6", "Maxtor 90845D5", "Maxtor 90680D4", "Maxtor 90510D3", "Maxtor 90340D2",
+	"Maxtor 91152D8", "Maxtor 91008D7", "Maxtor 90845D6", "Maxtor 90840D6", "Maxtor 90720D5", "Maxtor 90648D5", "Maxtor 90576D4",
+	"Maxtor 90510D4",
+	"Maxtor 90432D3", "Maxtor 90288D2", "Maxtor 90256D2",
+	"Maxtor 91000D8", "Maxtor 90910D8", "Maxtor 90875D7", "Maxtor 90840D7", "Maxtor 90750D6", "Maxtor 90625D5", "Maxtor 90500D4",
+	"Maxtor 91728D8", "Maxtor 91512D7", "Maxtor 91303D6", "Maxtor 91080D5", "Maxtor 90845D4", "Maxtor 90680D4", "Maxtor 90648D3", "Maxtor 90432D2",
+	NULL
+};
+
+static u8 xfer_speeds[] = {
+	XFER_UDMA_6,
+	XFER_UDMA_5,
+	XFER_UDMA_4,
+	XFER_UDMA_3,
+	XFER_UDMA_2,
+	XFER_UDMA_1,
+	XFER_UDMA_0,
+
+	XFER_MW_DMA_2,
+	XFER_MW_DMA_1,
+	XFER_MW_DMA_0,
+
+	XFER_PIO_4,
+	XFER_PIO_3,
+	XFER_PIO_2,
+	XFER_PIO_1,
+	XFER_PIO_0
+};
+
+/* Key for bus clock timings
+ * 36x   37x
+ * bits  bits
+ * 0:3	 0:3	data_high_time. Inactive time of DIOW_/DIOR_ for PIO and MW DMA.
+ *		cycles = value + 1
+ * 4:7	 4:8	data_low_time. Active time of DIOW_/DIOR_ for PIO and MW DMA.
+ *		cycles = value + 1
+ * 8:11  9:12	cmd_high_time. Inactive time of DIOW_/DIOR_ during task file
+ *		register access.
+ * 12:15 13:17	cmd_low_time. Active time of DIOW_/DIOR_ during task file
+ *		register access.
+ * 16:18 18:20	udma_cycle_time. Clock cycles for UDMA xfer.
+ * -	 21	CLK frequency: 0=ATA clock, 1=dual ATA clock.
+ * 19:21 22:24	pre_high_time. Time to initialize the 1st cycle for PIO and
+ *		MW DMA xfer.
+ * 22:24 25:27	cmd_pre_high_time. Time to initialize the 1st PIO cycle for
+ *		task file register access.
+ * 28	 28	UDMA enable.
+ * 29	 29	DMA  enable.
+ * 30	 30	PIO MST enable. If set, the chip is in bus master mode during
+ *		PIO xfer.
+ * 31	 31	FIFO enable.
+ */
+
+static u32 forty_base_hpt36x[] = {
+	/* XFER_UDMA_6 */	0x900fd943,
+	/* XFER_UDMA_5 */	0x900fd943,
+	/* XFER_UDMA_4 */	0x900fd943,
+	/* XFER_UDMA_3 */	0x900ad943,
+	/* XFER_UDMA_2 */	0x900bd943,
+	/* XFER_UDMA_1 */	0x9008d943,
+	/* XFER_UDMA_0 */	0x9008d943,
+
+	/* XFER_MW_DMA_2 */	0xa008d943,
+	/* XFER_MW_DMA_1 */	0xa010d955,
+	/* XFER_MW_DMA_0 */	0xa010d9fc,
+
+	/* XFER_PIO_4 */	0xc008d963,
+	/* XFER_PIO_3 */	0xc010d974,
+	/* XFER_PIO_2 */	0xc010d997,
+	/* XFER_PIO_1 */	0xc010d9c7,
+	/* XFER_PIO_0 */	0xc018d9d9
+};
+
+static u32 thirty_three_base_hpt36x[] = {
+	/* XFER_UDMA_6 */	0x90c9a731,
+	/* XFER_UDMA_5 */	0x90c9a731,
+	/* XFER_UDMA_4 */	0x90c9a731,
+	/* XFER_UDMA_3 */	0x90cfa731,
+	/* XFER_UDMA_2 */	0x90caa731,
+	/* XFER_UDMA_1 */	0x90cba731,
+	/* XFER_UDMA_0 */	0x90c8a731,
+
+	/* XFER_MW_DMA_2 */	0xa0c8a731,
+	/* XFER_MW_DMA_1 */	0xa0c8a732,	/* 0xa0c8a733 */
+	/* XFER_MW_DMA_0 */	0xa0c8a797,
+
+	/* XFER_PIO_4 */	0xc0c8a731,
+	/* XFER_PIO_3 */	0xc0c8a742,
+	/* XFER_PIO_2 */	0xc0d0a753,
+	/* XFER_PIO_1 */	0xc0d0a7a3,	/* 0xc0d0a793 */
+	/* XFER_PIO_0 */	0xc0d0a7aa	/* 0xc0d0a7a7 */
+};
+
+static u32 twenty_five_base_hpt36x[] = {
+	/* XFER_UDMA_6 */	0x90c98521,
+	/* XFER_UDMA_5 */	0x90c98521,
+	/* XFER_UDMA_4 */	0x90c98521,
+	/* XFER_UDMA_3 */	0x90cf8521,
+	/* XFER_UDMA_2 */	0x90cf8521,
+	/* XFER_UDMA_1 */	0x90cb8521,
+	/* XFER_UDMA_0 */	0x90cb8521,
+
+	/* XFER_MW_DMA_2 */	0xa0ca8521,
+	/* XFER_MW_DMA_1 */	0xa0ca8532,
+	/* XFER_MW_DMA_0 */	0xa0ca8575,
+
+	/* XFER_PIO_4 */	0xc0ca8521,
+	/* XFER_PIO_3 */	0xc0ca8532,
+	/* XFER_PIO_2 */	0xc0ca8542,
+	/* XFER_PIO_1 */	0xc0d08572,
+	/* XFER_PIO_0 */	0xc0d08585
+};
+
+/*
+ * The following are the new timing tables with PIO mode data/taskfile transfer
+ * overclocking fixed...
+ */
+
+/* This table is taken from the HPT370 data manual rev. 1.02 */
+static u32 thirty_three_base_hpt37x[] = {
+	/* XFER_UDMA_6 */	0x16455031,	/* 0x16655031 ?? */
+	/* XFER_UDMA_5 */	0x16455031,
+	/* XFER_UDMA_4 */	0x16455031,
+	/* XFER_UDMA_3 */	0x166d5031,
+	/* XFER_UDMA_2 */	0x16495031,
+	/* XFER_UDMA_1 */	0x164d5033,
+	/* XFER_UDMA_0 */	0x16515097,
+
+	/* XFER_MW_DMA_2 */	0x26515031,
+	/* XFER_MW_DMA_1 */	0x26515033,
+	/* XFER_MW_DMA_0 */	0x26515097,
+
+	/* XFER_PIO_4 */	0x06515021,
+	/* XFER_PIO_3 */	0x06515022,
+	/* XFER_PIO_2 */	0x06515033,
+	/* XFER_PIO_1 */	0x06915065,
+	/* XFER_PIO_0 */	0x06d1508a
+};
+
+static u32 fifty_base_hpt37x[] = {
+	/* XFER_UDMA_6 */	0x1a861842,
+	/* XFER_UDMA_5 */	0x1a861842,
+	/* XFER_UDMA_4 */	0x1aae1842,
+	/* XFER_UDMA_3 */	0x1a8e1842,
+	/* XFER_UDMA_2 */	0x1a0e1842,
+	/* XFER_UDMA_1 */	0x1a161854,
+	/* XFER_UDMA_0 */	0x1a1a18ea,
+
+	/* XFER_MW_DMA_2 */	0x2a821842,
+	/* XFER_MW_DMA_1 */	0x2a821854,
+	/* XFER_MW_DMA_0 */	0x2a8218ea,
+
+	/* XFER_PIO_4 */	0x0a821842,
+	/* XFER_PIO_3 */	0x0a821843,
+	/* XFER_PIO_2 */	0x0a821855,
+	/* XFER_PIO_1 */	0x0ac218a8,
+	/* XFER_PIO_0 */	0x0b02190c
+};
+
+static u32 sixty_six_base_hpt37x[] = {
+	/* XFER_UDMA_6 */	0x1c86fe62,
+	/* XFER_UDMA_5 */	0x1caefe62,	/* 0x1c8afe62 */
+	/* XFER_UDMA_4 */	0x1c8afe62,
+	/* XFER_UDMA_3 */	0x1c8efe62,
+	/* XFER_UDMA_2 */	0x1c92fe62,
+	/* XFER_UDMA_1 */	0x1c9afe62,
+	/* XFER_UDMA_0 */	0x1c82fe62,
+
+	/* XFER_MW_DMA_2 */	0x2c82fe62,
+	/* XFER_MW_DMA_1 */	0x2c82fe66,
+	/* XFER_MW_DMA_0 */	0x2c82ff2e,
+
+	/* XFER_PIO_4 */	0x0c82fe62,
+	/* XFER_PIO_3 */	0x0c82fe84,
+	/* XFER_PIO_2 */	0x0c82fea6,
+	/* XFER_PIO_1 */	0x0d02ff26,
+	/* XFER_PIO_0 */	0x0d42ff7f
+};
+
+#define HPT371_ALLOW_ATA133_6		1
+#define HPT302_ALLOW_ATA133_6		1
+#define HPT372_ALLOW_ATA133_6		1
+#define HPT370_ALLOW_ATA100_5		0
+#define HPT366_ALLOW_ATA66_4		1
+#define HPT366_ALLOW_ATA66_3		1
+
+/* Supported ATA clock frequencies */
+enum ata_clock {
+	ATA_CLOCK_25MHZ,
+	ATA_CLOCK_33MHZ,
+	ATA_CLOCK_40MHZ,
+	ATA_CLOCK_50MHZ,
+	ATA_CLOCK_66MHZ,
+	NUM_ATA_CLOCKS
+};
+
+struct hpt_timings {
+	u32 pio_mask;
+	u32 dma_mask;
+	u32 ultra_mask;
+	u32 *clock_table[NUM_ATA_CLOCKS];
+};
+
+/*
+ *	Hold all the HighPoint chip information in one place.
+ */
+
+struct hpt_info {
+	char *chip_name;	/* Chip name */
+	u8 chip_type;		/* Chip type */
+	u8 udma_mask;		/* Allowed UltraDMA modes mask. */
+	u8 dpll_clk;		/* DPLL clock in MHz */
+	u8 pci_clk;		/* PCI  clock in MHz */
+	struct hpt_timings *timings; /* Chipset timing data */
+	u8 clock;		/* ATA clock selected */
+};
+
+/* Supported HighPoint chips */
+enum {
+	HPT36x,
+	HPT370,
+	HPT370A,
+	HPT374,
+	HPT372,
+	HPT372A,
+	HPT302,
+	HPT371,
+	HPT372N,
+	HPT302N,
+	HPT371N
+};
+
+static struct hpt_timings hpt36x_timings = {
+	.pio_mask	= 0xc1f8ffff,
+	.dma_mask	= 0x303800ff,
+	.ultra_mask	= 0x30070000,
+	.clock_table	= {
+		[ATA_CLOCK_25MHZ] = twenty_five_base_hpt36x,
+		[ATA_CLOCK_33MHZ] = thirty_three_base_hpt36x,
+		[ATA_CLOCK_40MHZ] = forty_base_hpt36x,
+		[ATA_CLOCK_50MHZ] = NULL,
+		[ATA_CLOCK_66MHZ] = NULL
+	}
+};
+
+static struct hpt_timings hpt37x_timings = {
+	.pio_mask	= 0xcfc3ffff,
+	.dma_mask	= 0x31c001ff,
+	.ultra_mask	= 0x303c0000,
+	.clock_table	= {
+		[ATA_CLOCK_25MHZ] = NULL,
+		[ATA_CLOCK_33MHZ] = thirty_three_base_hpt37x,
+		[ATA_CLOCK_40MHZ] = NULL,
+		[ATA_CLOCK_50MHZ] = fifty_base_hpt37x,
+		[ATA_CLOCK_66MHZ] = sixty_six_base_hpt37x
+	}
+};
+
+static const struct hpt_info hpt36x = {
+	.chip_name	= "HPT36x",
+	.chip_type	= HPT36x,
+	.udma_mask	= HPT366_ALLOW_ATA66_3 ? (HPT366_ALLOW_ATA66_4 ? ATA_UDMA4 : ATA_UDMA3) : ATA_UDMA2,
+	.dpll_clk	= 0,	/* no DPLL */
+	.timings	= &hpt36x_timings
+};
+
+static const struct hpt_info hpt370 = {
+	.chip_name	= "HPT370",
+	.chip_type	= HPT370,
+	.udma_mask	= HPT370_ALLOW_ATA100_5 ? ATA_UDMA5 : ATA_UDMA4,
+	.dpll_clk	= 48,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt370a = {
+	.chip_name	= "HPT370A",
+	.chip_type	= HPT370A,
+	.udma_mask	= HPT370_ALLOW_ATA100_5 ? ATA_UDMA5 : ATA_UDMA4,
+	.dpll_clk	= 48,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt374 = {
+	.chip_name	= "HPT374",
+	.chip_type	= HPT374,
+	.udma_mask	= ATA_UDMA5,
+	.dpll_clk	= 48,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt372 = {
+	.chip_name	= "HPT372",
+	.chip_type	= HPT372,
+	.udma_mask	= HPT372_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 55,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt372a = {
+	.chip_name	= "HPT372A",
+	.chip_type	= HPT372A,
+	.udma_mask	= HPT372_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 66,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt302 = {
+	.chip_name	= "HPT302",
+	.chip_type	= HPT302,
+	.udma_mask	= HPT302_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 66,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt371 = {
+	.chip_name	= "HPT371",
+	.chip_type	= HPT371,
+	.udma_mask	= HPT371_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 66,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt372n = {
+	.chip_name	= "HPT372N",
+	.chip_type	= HPT372N,
+	.udma_mask	= HPT372_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 77,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt302n = {
+	.chip_name	= "HPT302N",
+	.chip_type	= HPT302N,
+	.udma_mask	= HPT302_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 77,
+	.timings	= &hpt37x_timings
+};
+
+static const struct hpt_info hpt371n = {
+	.chip_name	= "HPT371N",
+	.chip_type	= HPT371N,
+	.udma_mask	= HPT371_ALLOW_ATA133_6 ? ATA_UDMA6 : ATA_UDMA5,
+	.dpll_clk	= 77,
+	.timings	= &hpt37x_timings
+};
+
+static bool check_in_drive_list(ide_drive_t *drive, const char **list)
+{
+	return match_string(list, -1, (char *)&drive->id[ATA_ID_PROD]) >= 0;
+}
+
+static struct hpt_info *hpt3xx_get_info(struct device *dev)
+{
+	struct ide_host *host	= dev_get_drvdata(dev);
+	struct hpt_info *info	= (struct hpt_info *)host->host_priv;
+
+	return dev == host->dev[1] ? info + 1 : info;
+}
+
+/*
+ * The Marvell bridge chips used on the HighPoint SATA cards do not seem
+ * to support the UltraDMA modes 1, 2, and 3 as well as any MWDMA modes...
+ */
+
+static u8 hpt3xx_udma_filter(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+	u8 mask 		= hwif->ultra_mask;
+
+	switch (info->chip_type) {
+	case HPT36x:
+		if (!HPT366_ALLOW_ATA66_4 ||
+		    check_in_drive_list(drive, bad_ata66_4))
+			mask = ATA_UDMA3;
+
+		if (!HPT366_ALLOW_ATA66_3 ||
+		    check_in_drive_list(drive, bad_ata66_3))
+			mask = ATA_UDMA2;
+		break;
+	case HPT370:
+		if (!HPT370_ALLOW_ATA100_5 ||
+		    check_in_drive_list(drive, bad_ata100_5))
+			mask = ATA_UDMA4;
+		break;
+	case HPT370A:
+		if (!HPT370_ALLOW_ATA100_5 ||
+		    check_in_drive_list(drive, bad_ata100_5))
+			return ATA_UDMA4;
+		fallthrough;
+	case HPT372 :
+	case HPT372A:
+	case HPT372N:
+	case HPT374 :
+		if (ata_id_is_sata(drive->id))
+			mask &= ~0x0e;
+		fallthrough;
+	default:
+		return mask;
+	}
+
+	return check_in_drive_list(drive, bad_ata33) ? 0x00 : mask;
+}
+
+static u8 hpt3xx_mdma_filter(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+
+	switch (info->chip_type) {
+	case HPT372 :
+	case HPT372A:
+	case HPT372N:
+	case HPT374 :
+		if (ata_id_is_sata(drive->id))
+			return 0x00;
+		fallthrough;
+	default:
+		return 0x07;
+	}
+}
+
+static u32 get_speed_setting(u8 speed, struct hpt_info *info)
+{
+	int i;
+
+	/*
+	 * Lookup the transfer mode table to get the index into
+	 * the timing table.
+	 *
+	 * NOTE: For XFER_PIO_SLOW, PIO mode 0 timings will be used.
+	 */
+	for (i = 0; i < ARRAY_SIZE(xfer_speeds) - 1; i++)
+		if (xfer_speeds[i] == speed)
+			break;
+
+	return info->timings->clock_table[info->clock][i];
+}
+
+static void hpt3xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+	struct hpt_timings *t	= info->timings;
+	u8  itr_addr		= 0x40 + (drive->dn * 4);
+	u32 old_itr		= 0;
+	const u8 speed		= drive->dma_mode;
+	u32 new_itr		= get_speed_setting(speed, info);
+	u32 itr_mask		= speed < XFER_MW_DMA_0 ? t->pio_mask :
+				 (speed < XFER_UDMA_0   ? t->dma_mask :
+							  t->ultra_mask);
+
+	pci_read_config_dword(dev, itr_addr, &old_itr);
+	new_itr = (old_itr & ~itr_mask) | (new_itr & itr_mask);
+	/*
+	 * Disable on-chip PIO FIFO/buffer (and PIO MST mode as well)
+	 * to avoid problems handling I/O errors later
+	 */
+	new_itr &= ~0xc0000000;
+
+	pci_write_config_dword(dev, itr_addr, new_itr);
+}
+
+static void hpt3xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	hpt3xx_set_mode(hwif, drive);
+}
+
+static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev	*dev	= to_pci_dev(hwif->dev);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+
+	if ((drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) == 0)
+		return;
+
+	if (info->chip_type >= HPT370) {
+		u8 scr1 = 0;
+
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		if (((scr1 & 0x10) >> 4) != mask) {
+			if (mask)
+				scr1 |=  0x10;
+			else
+				scr1 &= ~0x10;
+			pci_write_config_byte(dev, 0x5a, scr1);
+		}
+	} else if (mask)
+		disable_irq(hwif->irq);
+	else
+		enable_irq(hwif->irq);
+}
+
+/*
+ * This is specific to the HPT366 UDMA chipset
+ * by HighPoint|Triones Technologies, Inc.
+ */
+static void hpt366_dma_lost_irq(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u8 mcr1 = 0, mcr3 = 0, scr1 = 0;
+
+	pci_read_config_byte(dev, 0x50, &mcr1);
+	pci_read_config_byte(dev, 0x52, &mcr3);
+	pci_read_config_byte(dev, 0x5a, &scr1);
+	printk("%s: (%s)  mcr1=0x%02x, mcr3=0x%02x, scr1=0x%02x\n",
+		drive->name, __func__, mcr1, mcr3, scr1);
+	if (scr1 & 0x10)
+		pci_write_config_byte(dev, 0x5a, scr1 & ~0x10);
+	ide_dma_lost_irq(drive);
+}
+
+static void hpt370_clear_engine(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	pci_write_config_byte(dev, hwif->select_data, 0x37);
+	udelay(10);
+}
+
+static void hpt370_irq_timeout(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u16 bfifo		= 0;
+	u8  dma_cmd;
+
+	pci_read_config_word(dev, hwif->select_data + 2, &bfifo);
+	printk(KERN_DEBUG "%s: %d bytes in FIFO\n", drive->name, bfifo & 0x1ff);
+
+	/* get DMA command mode */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	/* stop DMA */
+	outb(dma_cmd & ~ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
+	hpt370_clear_engine(drive);
+}
+
+static void hpt370_dma_start(ide_drive_t *drive)
+{
+#ifdef HPT_RESET_STATE_ENGINE
+	hpt370_clear_engine(drive);
+#endif
+	ide_dma_start(drive);
+}
+
+static int hpt370_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	u8  dma_stat		= inb(hwif->dma_base + ATA_DMA_STATUS);
+
+	if (dma_stat & ATA_DMA_ACTIVE) {
+		/* wait a little */
+		udelay(20);
+		dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
+		if (dma_stat & ATA_DMA_ACTIVE)
+			hpt370_irq_timeout(drive);
+	}
+	return ide_dma_end(drive);
+}
+
+/* returns 1 if DMA IRQ issued, 0 otherwise */
+static int hpt374_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u16 bfifo		= 0;
+	u8  dma_stat;
+
+	pci_read_config_word(dev, hwif->select_data + 2, &bfifo);
+	if (bfifo & 0x1FF) {
+//		printk("%s: %d bytes in FIFO\n", drive->name, bfifo);
+		return 0;
+	}
+
+	dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
+	/* return 1 if INTR asserted */
+	if (dma_stat & ATA_DMA_INTR)
+		return 1;
+
+	return 0;
+}
+
+static int hpt374_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 mcr	= 0, mcr_addr	= hwif->select_data;
+	u8 bwsr = 0, mask	= hwif->channel ? 0x02 : 0x01;
+
+	pci_read_config_byte(dev, 0x6a, &bwsr);
+	pci_read_config_byte(dev, mcr_addr, &mcr);
+	if (bwsr & mask)
+		pci_write_config_byte(dev, mcr_addr, mcr | 0x30);
+	return ide_dma_end(drive);
+}
+
+/**
+ *	hpt3xxn_set_clock	-	perform clock switching dance
+ *	@hwif: hwif to switch
+ *	@mode: clocking mode (0x21 for write, 0x23 otherwise)
+ *
+ *	Switch the DPLL clock on the HPT3xxN devices. This is a	right mess.
+ */
+
+static void hpt3xxn_set_clock(ide_hwif_t *hwif, u8 mode)
+{
+	unsigned long base = hwif->extra_base;
+	u8 scr2 = inb(base + 0x6b);
+
+	if ((scr2 & 0x7f) == mode)
+		return;
+
+	/* Tristate the bus */
+	outb(0x80, base + 0x63);
+	outb(0x80, base + 0x67);
+
+	/* Switch clock and reset channels */
+	outb(mode, base + 0x6b);
+	outb(0xc0, base + 0x69);
+
+	/*
+	 * Reset the state machines.
+	 * NOTE: avoid accidentally enabling the disabled channels.
+	 */
+	outb(inb(base + 0x60) | 0x32, base + 0x60);
+	outb(inb(base + 0x64) | 0x32, base + 0x64);
+
+	/* Complete reset */
+	outb(0x00, base + 0x69);
+
+	/* Reconnect channels to bus */
+	outb(0x00, base + 0x63);
+	outb(0x00, base + 0x67);
+}
+
+/**
+ *	hpt3xxn_rw_disk		-	prepare for I/O
+ *	@drive: drive for command
+ *	@rq: block request structure
+ *
+ *	This is called when a disk I/O is issued to HPT3xxN.
+ *	We need it because of the clock switching.
+ */
+
+static void hpt3xxn_rw_disk(ide_drive_t *drive, struct request *rq)
+{
+	hpt3xxn_set_clock(drive->hwif, rq_data_dir(rq) ? 0x21 : 0x23);
+}
+
+/**
+ *	hpt37x_calibrate_dpll	-	calibrate the DPLL
+ *	@dev: PCI device
+ *
+ *	Perform a calibration cycle on the DPLL.
+ *	Returns 1 if this succeeds
+ */
+static int hpt37x_calibrate_dpll(struct pci_dev *dev, u16 f_low, u16 f_high)
+{
+	u32 dpll = (f_high << 16) | f_low | 0x100;
+	u8  scr2;
+	int i;
+
+	pci_write_config_dword(dev, 0x5c, dpll);
+
+	/* Wait for oscillator ready */
+	for(i = 0; i < 0x5000; ++i) {
+		udelay(50);
+		pci_read_config_byte(dev, 0x5b, &scr2);
+		if (scr2 & 0x80)
+			break;
+	}
+	/* See if it stays ready (we'll just bail out if it's not yet) */
+	for(i = 0; i < 0x1000; ++i) {
+		pci_read_config_byte(dev, 0x5b, &scr2);
+		/* DPLL destabilized? */
+		if(!(scr2 & 0x80))
+			return 0;
+	}
+	/* Turn off tuning, we have the DPLL set */
+	pci_read_config_dword (dev, 0x5c, &dpll);
+	pci_write_config_dword(dev, 0x5c, (dpll & ~0x100));
+	return 1;
+}
+
+static void hpt3xx_disable_fast_irq(struct pci_dev *dev, u8 mcr_addr)
+{
+	struct ide_host *host	= pci_get_drvdata(dev);
+	struct hpt_info *info	= host->host_priv + (&dev->dev == host->dev[1]);
+	u8  chip_type		= info->chip_type;
+	u8  new_mcr, old_mcr	= 0;
+
+	/*
+	 * Disable the "fast interrupt" prediction.  Don't hold off
+	 * on interrupts. (== 0x01 despite what the docs say)
+	 */
+	pci_read_config_byte(dev, mcr_addr + 1, &old_mcr);
+
+	if (chip_type >= HPT374)
+		new_mcr = old_mcr & ~0x07;
+	else if (chip_type >= HPT370) {
+		new_mcr = old_mcr;
+		new_mcr &= ~0x02;
+#ifdef HPT_DELAY_INTERRUPT
+		new_mcr &= ~0x01;
+#else
+		new_mcr |=  0x01;
+#endif
+	} else					/* HPT366 and HPT368  */
+		new_mcr = old_mcr & ~0x80;
+
+	if (new_mcr != old_mcr)
+		pci_write_config_byte(dev, mcr_addr + 1, new_mcr);
+}
+
+static int init_chipset_hpt366(struct pci_dev *dev)
+{
+	unsigned long io_base	= pci_resource_start(dev, 4);
+	struct hpt_info *info	= hpt3xx_get_info(&dev->dev);
+	const char *name	= DRV_NAME;
+	u8 pci_clk,  dpll_clk	= 0;	/* PCI and DPLL clock in MHz */
+	u8 chip_type;
+	enum ata_clock	clock;
+
+	chip_type = info->chip_type;
+
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, (L1_CACHE_BYTES / 4));
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x78);
+	pci_write_config_byte(dev, PCI_MIN_GNT, 0x08);
+	pci_write_config_byte(dev, PCI_MAX_LAT, 0x08);
+
+	/*
+	 * First, try to estimate the PCI clock frequency...
+	 */
+	if (chip_type >= HPT370) {
+		u8  scr1  = 0;
+		u16 f_cnt = 0;
+		u32 temp  = 0;
+
+		/* Interrupt force enable. */
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		if (scr1 & 0x10)
+			pci_write_config_byte(dev, 0x5a, scr1 & ~0x10);
+
+		/*
+		 * HighPoint does this for HPT372A.
+		 * NOTE: This register is only writeable via I/O space.
+		 */
+		if (chip_type == HPT372A)
+			outb(0x0e, io_base + 0x9c);
+
+		/*
+		 * Default to PCI clock. Make sure MA15/16 are set to output
+		 * to prevent drives having problems with 40-pin cables.
+		 */
+		pci_write_config_byte(dev, 0x5b, 0x23);
+
+		/*
+		 * We'll have to read f_CNT value in order to determine
+		 * the PCI clock frequency according to the following ratio:
+		 *
+		 * f_CNT = Fpci * 192 / Fdpll
+		 *
+		 * First try reading the register in which the HighPoint BIOS
+		 * saves f_CNT value before  reprogramming the DPLL from its
+		 * default setting (which differs for the various chips).
+		 *
+		 * NOTE: This register is only accessible via I/O space;
+		 * HPT374 BIOS only saves it for the function 0, so we have to
+		 * always read it from there -- no need to check the result of
+		 * pci_get_slot() for the function 0 as the whole device has
+		 * been already "pinned" (via function 1) in init_setup_hpt374()
+		 */
+		if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
+			struct pci_dev	*dev1 = pci_get_slot(dev->bus,
+							     dev->devfn - 1);
+			unsigned long io_base = pci_resource_start(dev1, 4);
+
+			temp =	inl(io_base + 0x90);
+			pci_dev_put(dev1);
+		} else
+			temp =	inl(io_base + 0x90);
+
+		/*
+		 * In case the signature check fails, we'll have to
+		 * resort to reading the f_CNT register itself in hopes
+		 * that nobody has touched the DPLL yet...
+		 */
+		if ((temp & 0xFFFFF000) != 0xABCDE000) {
+			int i;
+
+			printk(KERN_WARNING "%s %s: no clock data saved by "
+				"BIOS\n", name, pci_name(dev));
+
+			/* Calculate the average value of f_CNT. */
+			for (temp = i = 0; i < 128; i++) {
+				pci_read_config_word(dev, 0x78, &f_cnt);
+				temp += f_cnt & 0x1ff;
+				mdelay(1);
+			}
+			f_cnt = temp / 128;
+		} else
+			f_cnt = temp & 0x1ff;
+
+		dpll_clk = info->dpll_clk;
+		pci_clk  = (f_cnt * dpll_clk) / 192;
+
+		/* Clamp PCI clock to bands. */
+		if (pci_clk < 40)
+			pci_clk = 33;
+		else if(pci_clk < 45)
+			pci_clk = 40;
+		else if(pci_clk < 55)
+			pci_clk = 50;
+		else
+			pci_clk = 66;
+
+		printk(KERN_INFO "%s %s: DPLL base: %d MHz, f_CNT: %d, "
+			"assuming %d MHz PCI\n", name, pci_name(dev),
+			dpll_clk, f_cnt, pci_clk);
+	} else {
+		u32 itr1 = 0;
+
+		pci_read_config_dword(dev, 0x40, &itr1);
+
+		/* Detect PCI clock by looking at cmd_high_time. */
+		switch ((itr1 >> 8) & 0x0f) {
+			case 0x09:
+				pci_clk = 40;
+				break;
+			case 0x05:
+				pci_clk = 25;
+				break;
+			case 0x07:
+			default:
+				pci_clk = 33;
+				break;
+		}
+	}
+
+	/* Let's assume we'll use PCI clock for the ATA clock... */
+	switch (pci_clk) {
+		case 25:
+			clock = ATA_CLOCK_25MHZ;
+			break;
+		case 33:
+		default:
+			clock = ATA_CLOCK_33MHZ;
+			break;
+		case 40:
+			clock = ATA_CLOCK_40MHZ;
+			break;
+		case 50:
+			clock = ATA_CLOCK_50MHZ;
+			break;
+		case 66:
+			clock = ATA_CLOCK_66MHZ;
+			break;
+	}
+
+	/*
+	 * Only try the DPLL if we don't have a table for the PCI clock that
+	 * we are running at for HPT370/A, always use it  for anything newer...
+	 *
+	 * NOTE: Using the internal DPLL results in slow reads on 33 MHz PCI.
+	 * We also  don't like using  the DPLL because this causes glitches
+	 * on PRST-/SRST- when the state engine gets reset...
+	 */
+	if (chip_type >= HPT374 || info->timings->clock_table[clock] == NULL) {
+		u16 f_low, delta = pci_clk < 50 ? 2 : 4;
+		int adjust;
+
+		 /*
+		  * Select 66 MHz DPLL clock only if UltraATA/133 mode is
+		  * supported/enabled, use 50 MHz DPLL clock otherwise...
+		  */
+		if (info->udma_mask == ATA_UDMA6) {
+			dpll_clk = 66;
+			clock = ATA_CLOCK_66MHZ;
+		} else if (dpll_clk) {	/* HPT36x chips don't have DPLL */
+			dpll_clk = 50;
+			clock = ATA_CLOCK_50MHZ;
+		}
+
+		if (info->timings->clock_table[clock] == NULL) {
+			printk(KERN_ERR "%s %s: unknown bus timing!\n",
+				name, pci_name(dev));
+			return -EIO;
+		}
+
+		/* Select the DPLL clock. */
+		pci_write_config_byte(dev, 0x5b, 0x21);
+
+		/*
+		 * Adjust the DPLL based upon PCI clock, enable it,
+		 * and wait for stabilization...
+		 */
+		f_low = (pci_clk * 48) / dpll_clk;
+
+		for (adjust = 0; adjust < 8; adjust++) {
+			if(hpt37x_calibrate_dpll(dev, f_low, f_low + delta))
+				break;
+
+			/*
+			 * See if it'll settle at a fractionally different clock
+			 */
+			if (adjust & 1)
+				f_low -= adjust >> 1;
+			else
+				f_low += adjust >> 1;
+		}
+		if (adjust == 8) {
+			printk(KERN_ERR "%s %s: DPLL did not stabilize!\n",
+				name, pci_name(dev));
+			return -EIO;
+		}
+
+		printk(KERN_INFO "%s %s: using %d MHz DPLL clock\n",
+			name, pci_name(dev), dpll_clk);
+	} else {
+		/* Mark the fact that we're not using the DPLL. */
+		dpll_clk = 0;
+
+		printk(KERN_INFO "%s %s: using %d MHz PCI clock\n",
+			name, pci_name(dev), pci_clk);
+	}
+
+	/* Store the clock frequencies. */
+	info->dpll_clk	= dpll_clk;
+	info->pci_clk	= pci_clk;
+	info->clock	= clock;
+
+	if (chip_type >= HPT370) {
+		u8  mcr1, mcr4;
+
+		/*
+		 * Reset the state engines.
+		 * NOTE: Avoid accidentally enabling the disabled channels.
+		 */
+		pci_read_config_byte (dev, 0x50, &mcr1);
+		pci_read_config_byte (dev, 0x54, &mcr4);
+		pci_write_config_byte(dev, 0x50, (mcr1 | 0x32));
+		pci_write_config_byte(dev, 0x54, (mcr4 | 0x32));
+		udelay(100);
+	}
+
+	/*
+	 * On  HPT371N, if ATA clock is 66 MHz we must set bit 2 in
+	 * the MISC. register to stretch the UltraDMA Tss timing.
+	 * NOTE: This register is only writeable via I/O space.
+	 */
+	if (chip_type == HPT371N && clock == ATA_CLOCK_66MHZ)
+		outb(inb(io_base + 0x9c) | 0x04, io_base + 0x9c);
+
+	hpt3xx_disable_fast_irq(dev, 0x50);
+	hpt3xx_disable_fast_irq(dev, 0x54);
+
+	return 0;
+}
+
+static u8 hpt3xx_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev	*dev	= to_pci_dev(hwif->dev);
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+	u8 chip_type		= info->chip_type;
+	u8 scr1 = 0, ata66	= hwif->channel ? 0x01 : 0x02;
+
+	/*
+	 * The HPT37x uses the CBLID pins as outputs for MA15/MA16
+	 * address lines to access an external EEPROM.  To read valid
+	 * cable detect state the pins must be enabled as inputs.
+	 */
+	if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
+		/*
+		 * HPT374 PCI function 1
+		 * - set bit 15 of reg 0x52 to enable TCBLID as input
+		 * - set bit 15 of reg 0x56 to enable FCBLID as input
+		 */
+		u8  mcr_addr = hwif->select_data + 2;
+		u16 mcr;
+
+		pci_read_config_word(dev, mcr_addr, &mcr);
+		pci_write_config_word(dev, mcr_addr, mcr | 0x8000);
+		/* Debounce, then read cable ID register */
+		udelay(10);
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		pci_write_config_word(dev, mcr_addr, mcr);
+	} else if (chip_type >= HPT370) {
+		/*
+		 * HPT370/372 and 374 pcifn 0
+		 * - clear bit 0 of reg 0x5b to enable P/SCBLID as inputs
+		 */
+		u8 scr2 = 0;
+
+		pci_read_config_byte(dev, 0x5b, &scr2);
+		pci_write_config_byte(dev, 0x5b, scr2 & ~1);
+		/* Debounce, then read cable ID register */
+		udelay(10);
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		pci_write_config_byte(dev, 0x5b, scr2);
+	} else
+		pci_read_config_byte(dev, 0x5a, &scr1);
+
+	return (scr1 & ata66) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static void init_hwif_hpt366(ide_hwif_t *hwif)
+{
+	struct hpt_info *info	= hpt3xx_get_info(hwif->dev);
+	u8  chip_type		= info->chip_type;
+
+	/* Cache the channel's MISC. control registers' offset */
+	hwif->select_data	= hwif->channel ? 0x54 : 0x50;
+
+	/*
+	 * HPT3xxN chips have some complications:
+	 *
+	 * - on 33 MHz PCI we must clock switch
+	 * - on 66 MHz PCI we must NOT use the PCI clock
+	 */
+	if (chip_type >= HPT372N && info->dpll_clk && info->pci_clk < 66) {
+		/*
+		 * Clock is shared between the channels,
+		 * so we'll have to serialize them... :-(
+		 */
+		hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
+		hwif->rw_disk = &hpt3xxn_rw_disk;
+	}
+}
+
+static int init_dma_hpt366(ide_hwif_t *hwif,
+				     const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long flags, base = ide_pci_dma_base(hwif, d);
+	u8 dma_old, dma_new, masterdma = 0, slavedma = 0;
+
+	if (base == 0)
+		return -1;
+
+	hwif->dma_base = base;
+
+	if (ide_pci_check_simplex(hwif, d) < 0)
+		return -1;
+
+	if (ide_pci_set_master(dev, d->name) < 0)
+		return -1;
+
+	dma_old = inb(base + 2);
+
+	local_irq_save(flags);
+
+	dma_new = dma_old;
+	pci_read_config_byte(dev, hwif->channel ? 0x4b : 0x43, &masterdma);
+	pci_read_config_byte(dev, hwif->channel ? 0x4f : 0x47,  &slavedma);
+
+	if (masterdma & 0x30)	dma_new |= 0x20;
+	if ( slavedma & 0x30)	dma_new |= 0x40;
+	if (dma_new != dma_old)
+		outb(dma_new, base + 2);
+
+	local_irq_restore(flags);
+
+	printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
+			 hwif->name, base, base + 7);
+
+	hwif->extra_base = base + (hwif->channel ? 8 : 16);
+
+	if (ide_allocate_dma_engine(hwif))
+		return -1;
+
+	return 0;
+}
+
+static void hpt374_init(struct pci_dev *dev, struct pci_dev *dev2)
+{
+	if (dev2->irq != dev->irq) {
+		/* FIXME: we need a core pci_set_interrupt() */
+		dev2->irq = dev->irq;
+		printk(KERN_INFO DRV_NAME " %s: PCI config space interrupt "
+			"fixed\n", pci_name(dev2));
+	}
+}
+
+static void hpt371_init(struct pci_dev *dev)
+{
+	u8 mcr1 = 0;
+
+	/*
+	 * HPT371 chips physically have only one channel, the secondary one,
+	 * but the primary channel registers do exist!  Go figure...
+	 * So,  we manually disable the non-existing channel here
+	 * (if the BIOS hasn't done this already).
+	 */
+	pci_read_config_byte(dev, 0x50, &mcr1);
+	if (mcr1 & 0x04)
+		pci_write_config_byte(dev, 0x50, mcr1 & ~0x04);
+}
+
+static int hpt36x_init(struct pci_dev *dev, struct pci_dev *dev2)
+{
+	u8 mcr1 = 0, pin1 = 0, pin2 = 0;
+
+	/*
+	 * Now we'll have to force both channels enabled if
+	 * at least one of them has been enabled by BIOS...
+	 */
+	pci_read_config_byte(dev, 0x50, &mcr1);
+	if (mcr1 & 0x30)
+		pci_write_config_byte(dev, 0x50, mcr1 | 0x30);
+
+	pci_read_config_byte(dev,  PCI_INTERRUPT_PIN, &pin1);
+	pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin2);
+
+	if (pin1 != pin2 && dev->irq == dev2->irq) {
+		printk(KERN_INFO DRV_NAME " %s: onboard version of chipset, "
+			"pin1=%d pin2=%d\n", pci_name(dev), pin1, pin2);
+		return 1;
+	}
+
+	return 0;
+}
+
+#define IDE_HFLAGS_HPT3XX \
+	(IDE_HFLAG_NO_ATAPI_DMA | \
+	 IDE_HFLAG_OFF_BOARD)
+
+static const struct ide_port_ops hpt3xx_port_ops = {
+	.set_pio_mode		= hpt3xx_set_pio_mode,
+	.set_dma_mode		= hpt3xx_set_mode,
+	.maskproc		= hpt3xx_maskproc,
+	.mdma_filter		= hpt3xx_mdma_filter,
+	.udma_filter		= hpt3xx_udma_filter,
+	.cable_detect		= hpt3xx_cable_detect,
+};
+
+static const struct ide_dma_ops hpt37x_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= hpt374_dma_end,
+	.dma_test_irq		= hpt374_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_dma_ops hpt370_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= hpt370_dma_start,
+	.dma_end		= hpt370_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_clear		= hpt370_irq_timeout,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_dma_ops hpt36x_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= ide_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= hpt366_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info hpt366_chipsets[] = {
+	{	/* 0: HPT36x */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_hpt366,
+		.init_hwif	= init_hwif_hpt366,
+		.init_dma	= init_dma_hpt366,
+		/*
+		 * HPT36x chips have one channel per function and have
+		 * both channel enable bits located differently and visible
+		 * to both functions -- really stupid design decision... :-(
+		 * Bit 4 is for the primary channel, bit 5 for the secondary.
+		 */
+		.enablebits	= {{0x50,0x10,0x10}, {0x54,0x04,0x04}},
+		.port_ops	= &hpt3xx_port_ops,
+		.dma_ops	= &hpt36x_dma_ops,
+		.host_flags	= IDE_HFLAGS_HPT3XX | IDE_HFLAG_SINGLE,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+	},
+	{	/* 1: HPT3xx */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_hpt366,
+		.init_hwif	= init_hwif_hpt366,
+		.init_dma	= init_dma_hpt366,
+		.enablebits	= {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
+		.port_ops	= &hpt3xx_port_ops,
+		.dma_ops	= &hpt37x_dma_ops,
+		.host_flags	= IDE_HFLAGS_HPT3XX,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+	}
+};
+
+/**
+ *	hpt366_init_one	-	called when an HPT366 is found
+ *	@dev: the hpt366 device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+static int hpt366_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	const struct hpt_info *info = NULL;
+	struct hpt_info *dyn_info;
+	struct pci_dev *dev2 = NULL;
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+	u8 rev = dev->revision;
+	int ret;
+
+	if ((idx == 0 || idx == 4) && (PCI_FUNC(dev->devfn) & 1))
+		return -ENODEV;
+
+	switch (idx) {
+	case 0:
+		if (rev < 3)
+			info = &hpt36x;
+		else {
+			switch (min_t(u8, rev, 6)) {
+			case 3: info = &hpt370;  break;
+			case 4: info = &hpt370a; break;
+			case 5: info = &hpt372;  break;
+			case 6: info = &hpt372n; break;
+			}
+			idx++;
+		}
+		break;
+	case 1:
+		info = (rev > 1) ? &hpt372n : &hpt372a;
+		break;
+	case 2:
+		info = (rev > 1) ? &hpt302n : &hpt302;
+		break;
+	case 3:
+		hpt371_init(dev);
+		info = (rev > 1) ? &hpt371n : &hpt371;
+		break;
+	case 4:
+		info = &hpt374;
+		break;
+	case 5:
+		info = &hpt372n;
+		break;
+	}
+
+	printk(KERN_INFO DRV_NAME ": %s chipset detected\n", info->chip_name);
+
+	d = hpt366_chipsets[min_t(u8, idx, 1)];
+
+	d.udma_mask = info->udma_mask;
+
+	/* fixup ->dma_ops for HPT370/HPT370A */
+	if (info == &hpt370 || info == &hpt370a)
+		d.dma_ops = &hpt370_dma_ops;
+
+	if (info == &hpt36x || info == &hpt374)
+		dev2 = pci_get_slot(dev->bus, dev->devfn + 1);
+
+	dyn_info = kcalloc(dev2 ? 2 : 1, sizeof(*dyn_info), GFP_KERNEL);
+	if (dyn_info == NULL) {
+		printk(KERN_ERR "%s %s: out of memory!\n",
+			d.name, pci_name(dev));
+		pci_dev_put(dev2);
+		return -ENOMEM;
+	}
+
+	/*
+	 * Copy everything from a static "template" structure
+	 * to just allocated per-chip hpt_info structure.
+	 */
+	memcpy(dyn_info, info, sizeof(*dyn_info));
+
+	if (dev2) {
+		memcpy(dyn_info + 1, info, sizeof(*dyn_info));
+
+		if (info == &hpt374)
+			hpt374_init(dev, dev2);
+		else {
+			if (hpt36x_init(dev, dev2))
+				d.host_flags &= ~IDE_HFLAG_NON_BOOTABLE;
+		}
+
+		ret = ide_pci_init_two(dev, dev2, &d, dyn_info);
+		if (ret < 0) {
+			pci_dev_put(dev2);
+			kfree(dyn_info);
+		}
+		return ret;
+	}
+
+	ret = ide_pci_init_one(dev, &d, dyn_info);
+	if (ret < 0)
+		kfree(dyn_info);
+
+	return ret;
+}
+
+static void hpt366_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct ide_info *info = host->host_priv;
+	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
+
+	ide_pci_remove(dev);
+	pci_dev_put(dev2);
+	kfree(info);
+}
+
+static const struct pci_device_id hpt366_pci_tbl[] = {
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT366),  0 },
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372),  1 },
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT302),  2 },
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT371),  3 },
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT374),  4 },
+	{ PCI_VDEVICE(TTI, PCI_DEVICE_ID_TTI_HPT372N), 5 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, hpt366_pci_tbl);
+
+static struct pci_driver hpt366_pci_driver = {
+	.name		= "HPT366_IDE",
+	.id_table	= hpt366_pci_tbl,
+	.probe		= hpt366_init_one,
+	.remove		= hpt366_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init hpt366_ide_init(void)
+{
+	return ide_pci_register_driver(&hpt366_pci_driver);
+}
+
+static void __exit hpt366_ide_exit(void)
+{
+	pci_unregister_driver(&hpt366_pci_driver);
+}
+
+module_init(hpt366_ide_init);
+module_exit(hpt366_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for Highpoint HPT366 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ht6560b.c b/drivers/ide/ht6560b.c
new file mode 100644
index 000000000..743bc3693
--- /dev/null
+++ b/drivers/ide/ht6560b.c
@@ -0,0 +1,383 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1995-2000  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  HT-6560B EIDE-controller support
+ *  To activate controller support use kernel parameter "ide0=ht6560b".
+ *  Use hdparm utility to enable PIO mode support.
+ *
+ *  Author:    Mikko Ala-Fossi            <maf@iki.fi>
+ *             Jan Evert van Grootheest   <j.e.van.grootheest@caiway.nl>
+ *
+ */
+
+#define DRV_NAME	"ht6560b"
+#define HT6560B_VERSION "v0.08"
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+/* #define DEBUG */  /* remove comments for DEBUG messages */
+
+/*
+ * The special i/o-port that HT-6560B uses to configuration:
+ *    bit0 (0x01): "1" selects secondary interface
+ *    bit2 (0x04): "1" enables FIFO function
+ *    bit5 (0x20): "1" enables prefetched data read function  (???)
+ *
+ * The special i/o-port that HT-6560A uses to configuration:
+ *    bit0 (0x01): "1" selects secondary interface
+ *    bit1 (0x02): "1" enables prefetched data read function
+ *    bit2 (0x04): "0" enables multi-master system	      (?)
+ *    bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time	      (?)
+ */
+#define HT_CONFIG_PORT	  0x3e6
+
+static inline u8 HT_CONFIG(ide_drive_t *drive)
+{
+	return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;
+}
+
+/*
+ * FIFO + PREFETCH (both a/b-model)
+ */
+#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */
+/* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */
+#define HT_SECONDARY_IF	  0x01
+#define HT_PREFETCH_MODE  0x20
+
+/*
+ * ht6560b Timing values:
+ *
+ * I reviewed some assembler source listings of htide drivers and found
+ * out how they setup those cycle time interfacing values, as they at Holtek
+ * call them. IDESETUP.COM that is supplied with the drivers figures out
+ * optimal values and fetches those values to drivers. I found out that
+ * they use Select register to fetch timings to the ide board right after
+ * interface switching. After that it was quite easy to add code to
+ * ht6560b.c.
+ *
+ * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine
+ * for hda and hdc. But hdb needed higher values to work, so I guess
+ * that sometimes it is necessary to give higher value than IDESETUP
+ * gives.   [see cmd640.c for an extreme example of this. -ml]
+ *
+ * Perhaps I should explain something about these timing values:
+ * The higher nibble of value is the Recovery Time  (rt) and the lower nibble
+ * of the value is the Active Time  (at). Minimum value 2 is the fastest and
+ * the maximum value 15 is the slowest. Default values should be 15 for both.
+ * So 0x24 means 2 for rt and 4 for at. Each of the drives should have
+ * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or
+ * similar. If value is too small there will be all sorts of failures.
+ *
+ * Timing byte consists of
+ *	High nibble:  Recovery Cycle Time  (rt)
+ *	     The valid values range from 2 to 15. The default is 15.
+ *
+ *	Low nibble:   Active Cycle Time	   (at)
+ *	     The valid values range from 2 to 15. The default is 15.
+ *
+ * You can obtain optimized timing values by running Holtek IDESETUP.COM
+ * for DOS. DOS drivers get their timing values from command line, where
+ * the first value is the Recovery Time and the second value is the
+ * Active Time for each drive. Smaller value gives higher speed.
+ * In case of failures you should probably fall back to a higher value.
+ */
+static inline u8 HT_TIMING(ide_drive_t *drive)
+{
+	return (unsigned long)ide_get_drivedata(drive) & 0x00ff;
+}
+
+#define HT_TIMING_DEFAULT 0xff
+
+/*
+ * This routine handles interface switching for the peculiar hardware design
+ * on the F.G.I./Holtek HT-6560B VLB IDE interface.
+ * The HT-6560B can only enable one IDE port at a time, and requires a
+ * silly sequence (below) whenever we switch between primary and secondary.
+ */
+
+/*
+ * This routine is invoked from ide.c to prepare for access to a given drive.
+ */
+static void ht6560b_dev_select(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long flags;
+	static u8 current_select = 0;
+	static u8 current_timing = 0;
+	u8 select, timing;
+	
+	local_irq_save(flags);
+
+	select = HT_CONFIG(drive);
+	timing = HT_TIMING(drive);
+
+	/*
+	 * Need to enforce prefetch sometimes because otherwise
+	 * it'll hang (hard).
+	 */
+	if (drive->media != ide_disk ||
+	    (drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+		select |= HT_PREFETCH_MODE;
+
+	if (select != current_select || timing != current_timing) {
+		current_select = select;
+		current_timing = timing;
+		(void)inb(HT_CONFIG_PORT);
+		(void)inb(HT_CONFIG_PORT);
+		(void)inb(HT_CONFIG_PORT);
+		(void)inb(HT_CONFIG_PORT);
+		outb(select, HT_CONFIG_PORT);
+		/*
+		 * Set timing for this drive:
+		 */
+		outb(timing, hwif->io_ports.device_addr);
+		(void)inb(hwif->io_ports.status_addr);
+#ifdef DEBUG
+		printk("ht6560b: %s: select=%#x timing=%#x\n",
+			drive->name, select, timing);
+#endif
+	}
+	local_irq_restore(flags);
+
+	outb(drive->select | ATA_DEVICE_OBS, hwif->io_ports.device_addr);
+}
+
+/*
+ * Autodetection and initialization of ht6560b
+ */
+static int __init try_to_init_ht6560b(void)
+{
+	u8 orig_value;
+	int i;
+	
+	/* Autodetect ht6560b */
+	if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff)
+		return 0;
+	
+	for (i=3;i>0;i--) {
+		outb(0x00, HT_CONFIG_PORT);
+		if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
+			outb(orig_value, HT_CONFIG_PORT);
+			return 0;
+		}
+	}
+	outb(0x00, HT_CONFIG_PORT);
+	if ((~inb(HT_CONFIG_PORT))& 0x3f) {
+		outb(orig_value, HT_CONFIG_PORT);
+		return 0;
+	}
+	/*
+	 * Ht6560b autodetected
+	 */
+	outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT);
+	outb(HT_TIMING_DEFAULT, 0x1f6);	/* Select register */
+	(void)inb(0x1f7);		/* Status register */
+
+	printk("ht6560b " HT6560B_VERSION
+	       ": chipset detected and initialized"
+#ifdef DEBUG
+	       " with debug enabled"
+#endif
+	       "\n"
+		);
+	return 1;
+}
+
+static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)
+{
+	int active_time, recovery_time;
+	int active_cycles, recovery_cycles;
+	int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
+
+        if (pio) {
+		unsigned int cycle_time;
+		struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+
+		cycle_time = ide_pio_cycle_time(drive, pio);
+
+		/*
+		 *  Just like opti621.c we try to calculate the
+		 *  actual cycle time for recovery and activity
+		 *  according system bus speed.
+		 */
+		active_time = t->active;
+		recovery_time = cycle_time - active_time - t->setup;
+		/*
+		 *  Cycle times should be Vesa bus cycles
+		 */
+		active_cycles   = (active_time   * bus_speed + 999) / 1000;
+		recovery_cycles = (recovery_time * bus_speed + 999) / 1000;
+		/*
+		 *  Upper and lower limits
+		 */
+		if (active_cycles   < 2)  active_cycles   = 2;
+		if (recovery_cycles < 2)  recovery_cycles = 2;
+		if (active_cycles   > 15) active_cycles   = 15;
+		if (recovery_cycles > 15) recovery_cycles = 0;  /* 0==16 */
+		
+#ifdef DEBUG
+		printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio, recovery_cycles, recovery_time, active_cycles, active_time);
+#endif
+		
+		return (u8)((recovery_cycles << 4) | active_cycles);
+	} else {
+		
+#ifdef DEBUG
+		printk("ht6560b: drive %s setting pio=0\n", drive->name);
+#endif
+		
+		return HT_TIMING_DEFAULT;    /* default setting */
+	}
+}
+
+static DEFINE_SPINLOCK(ht6560b_lock);
+
+/*
+ *  Enable/Disable so called prefetch mode
+ */
+static void ht_set_prefetch(ide_drive_t *drive, u8 state)
+{
+	unsigned long flags, config;
+	int t = HT_PREFETCH_MODE << 8;
+
+	spin_lock_irqsave(&ht6560b_lock, flags);
+
+	config = (unsigned long)ide_get_drivedata(drive);
+
+	/*
+	 *  Prefetch mode and unmask irq seems to conflict
+	 */
+	if (state) {
+		config |= t;   /* enable prefetch mode */
+		drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
+		drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+	} else {
+		config &= ~t;  /* disable prefetch mode */
+		drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK;
+	}
+
+	ide_set_drivedata(drive, (void *)config);
+
+	spin_unlock_irqrestore(&ht6560b_lock, flags);
+
+#ifdef DEBUG
+	printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
+#endif
+}
+
+static void ht6560b_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long flags, config;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	u8 timing;
+	
+	switch (pio) {
+	case 8:         /* set prefetch off */
+	case 9:         /* set prefetch on */
+		ht_set_prefetch(drive, pio & 1);
+		return;
+	}
+
+	timing = ht_pio2timings(drive, pio);
+
+	spin_lock_irqsave(&ht6560b_lock, flags);
+	config = (unsigned long)ide_get_drivedata(drive);
+	config &= 0xff00;
+	config |= timing;
+	ide_set_drivedata(drive, (void *)config);
+	spin_unlock_irqrestore(&ht6560b_lock, flags);
+
+#ifdef DEBUG
+	printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
+#endif
+}
+
+static void __init ht6560b_init_dev(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	/* Setting default configurations for drives. */
+	unsigned long t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT;
+
+	if (hwif->channel)
+		t |= (HT_SECONDARY_IF << 8);
+
+	ide_set_drivedata(drive, (void *)t);
+}
+
+static bool probe_ht6560b;
+
+module_param_named(probe, probe_ht6560b, bool, 0);
+MODULE_PARM_DESC(probe, "probe for HT6560B chipset");
+
+static const struct ide_tp_ops ht6560b_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ht6560b_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_port_ops ht6560b_port_ops = {
+	.init_dev		= ht6560b_init_dev,
+	.set_pio_mode		= ht6560b_set_pio_mode,
+};
+
+static const struct ide_port_info ht6560b_port_info __initconst = {
+	.name			= DRV_NAME,
+	.chipset		= ide_ht6560b,
+	.tp_ops 		= &ht6560b_tp_ops,
+	.port_ops		= &ht6560b_port_ops,
+	.host_flags		= IDE_HFLAG_SERIALIZE | /* is this needed? */
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_ABUSE_PREFETCH,
+	.pio_mask		= ATA_PIO4,
+};
+
+static int __init ht6560b_init(void)
+{
+	if (probe_ht6560b == 0)
+		return -ENODEV;
+
+	if (!request_region(HT_CONFIG_PORT, 1, DRV_NAME)) {
+		printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n",
+			__func__);
+		return -ENODEV;
+	}
+
+	if (!try_to_init_ht6560b()) {
+		printk(KERN_NOTICE "%s: HBA not found\n", __func__);
+		goto release_region;
+	}
+
+	return ide_legacy_device_add(&ht6560b_port_info, 0);
+
+release_region:
+	release_region(HT_CONFIG_PORT, 1);
+	return -ENODEV;
+}
+
+module_init(ht6560b_init);
+
+MODULE_AUTHOR("See Local File");
+MODULE_DESCRIPTION("HT-6560B EIDE-controller support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/icside.c b/drivers/ide/icside.c
new file mode 100644
index 000000000..329c7e4bc
--- /dev/null
+++ b/drivers/ide/icside.c
@@ -0,0 +1,692 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 1996-2004 Russell King.
+ *
+ * Please note that this platform does not support 32-bit IDE IO.
+ */
+
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/ide.h>
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/scatterlist.h>
+#include <linux/io.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+
+#define DRV_NAME "icside"
+
+#define ICS_IDENT_OFFSET		0x2280
+
+#define ICS_ARCIN_V5_INTRSTAT		0x0000
+#define ICS_ARCIN_V5_INTROFFSET		0x0004
+#define ICS_ARCIN_V5_IDEOFFSET		0x2800
+#define ICS_ARCIN_V5_IDEALTOFFSET	0x2b80
+#define ICS_ARCIN_V5_IDESTEPPING	6
+
+#define ICS_ARCIN_V6_IDEOFFSET_1	0x2000
+#define ICS_ARCIN_V6_INTROFFSET_1	0x2200
+#define ICS_ARCIN_V6_INTRSTAT_1		0x2290
+#define ICS_ARCIN_V6_IDEALTOFFSET_1	0x2380
+#define ICS_ARCIN_V6_IDEOFFSET_2	0x3000
+#define ICS_ARCIN_V6_INTROFFSET_2	0x3200
+#define ICS_ARCIN_V6_INTRSTAT_2		0x3290
+#define ICS_ARCIN_V6_IDEALTOFFSET_2	0x3380
+#define ICS_ARCIN_V6_IDESTEPPING	6
+
+struct cardinfo {
+	unsigned int dataoffset;
+	unsigned int ctrloffset;
+	unsigned int stepping;
+};
+
+static struct cardinfo icside_cardinfo_v5 = {
+	.dataoffset	= ICS_ARCIN_V5_IDEOFFSET,
+	.ctrloffset	= ICS_ARCIN_V5_IDEALTOFFSET,
+	.stepping	= ICS_ARCIN_V5_IDESTEPPING,
+};
+
+static struct cardinfo icside_cardinfo_v6_1 = {
+	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_1,
+	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_1,
+	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
+};
+
+static struct cardinfo icside_cardinfo_v6_2 = {
+	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_2,
+	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_2,
+	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
+};
+
+struct icside_state {
+	unsigned int channel;
+	unsigned int enabled;
+	void __iomem *irq_port;
+	void __iomem *ioc_base;
+	unsigned int sel;
+	unsigned int type;
+	struct ide_host *host;
+};
+
+#define ICS_TYPE_A3IN	0
+#define ICS_TYPE_A3USER	1
+#define ICS_TYPE_V6	3
+#define ICS_TYPE_V5	15
+#define ICS_TYPE_NOTYPE	((unsigned int)-1)
+
+/* ---------------- Version 5 PCB Support Functions --------------------- */
+/* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+/* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
+}
+
+static const expansioncard_ops_t icside_ops_arcin_v5 = {
+	.irqenable	= icside_irqenable_arcin_v5,
+	.irqdisable	= icside_irqdisable_arcin_v5,
+};
+
+
+/* ---------------- Version 6 PCB Support Functions --------------------- */
+/* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : enable interrupts from card
+ */
+static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+	void __iomem *base = state->irq_port;
+
+	state->enabled = 1;
+
+	switch (state->channel) {
+	case 0:
+		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
+		readb(base + ICS_ARCIN_V6_INTROFFSET_2);
+		break;
+	case 1:
+		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
+		readb(base + ICS_ARCIN_V6_INTROFFSET_1);
+		break;
+	}
+}
+
+/* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+ * Purpose  : disable interrupts from card
+ */
+static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
+{
+	struct icside_state *state = ec->irq_data;
+
+	state->enabled = 0;
+
+	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+}
+
+/* Prototype: icside_irqprobe(struct expansion_card *ec)
+ * Purpose  : detect an active interrupt from card
+ */
+static int icside_irqpending_arcin_v6(struct expansion_card *ec)
+{
+	struct icside_state *state = ec->irq_data;
+
+	return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
+	       readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
+}
+
+static const expansioncard_ops_t icside_ops_arcin_v6 = {
+	.irqenable	= icside_irqenable_arcin_v6,
+	.irqdisable	= icside_irqdisable_arcin_v6,
+	.irqpending	= icside_irqpending_arcin_v6,
+};
+
+/*
+ * Handle routing of interrupts.  This is called before
+ * we write the command to the drive.
+ */
+static void icside_maskproc(ide_drive_t *drive, int mask)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	state->channel = hwif->channel;
+
+	if (state->enabled && !mask) {
+		switch (hwif->channel) {
+		case 0:
+			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+			break;
+		case 1:
+			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+			break;
+		}
+	} else {
+		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
+		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
+	}
+
+	local_irq_restore(flags);
+}
+
+static const struct ide_port_ops icside_v6_no_dma_port_ops = {
+	.maskproc		= icside_maskproc,
+};
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_ICS
+/*
+ * SG-DMA support.
+ *
+ * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
+ * There is only one DMA controller per card, which means that only
+ * one drive can be accessed at one time.  NOTE! We do not enforce that
+ * here, but we rely on the main IDE driver spotting that both
+ * interfaces use the same IRQ, which should guarantee this.
+ */
+
+/*
+ * Configure the IOMD to give the appropriate timings for the transfer
+ * mode being requested.  We take the advice of the ATA standards, and
+ * calculate the cycle time based on the transfer mode, and the EIDE
+ * MW DMA specs that the drive provides in the IDENTIFY command.
+ *
+ * We have the following IOMD DMA modes to choose from:
+ *
+ *	Type	Active		Recovery	Cycle
+ *	A	250 (250)	312 (550)	562 (800)
+ *	B	187		250		437
+ *	C	125 (125)	125 (375)	250 (500)
+ *	D	62		125		187
+ *
+ * (figures in brackets are actual measured timings)
+ *
+ * However, we also need to take care of the read/write active and
+ * recovery timings:
+ *
+ *			Read	Write
+ *  	Mode	Active	-- Recovery --	Cycle	IOMD type
+ *	MW0	215	50	215	480	A
+ *	MW1	80	50	50	150	C
+ *	MW2	70	25	25	120	C
+ */
+static void icside_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long cycle_time = 0;
+	int use_dma_info = 0;
+	const u8 xfer_mode = drive->dma_mode;
+
+	switch (xfer_mode) {
+	case XFER_MW_DMA_2:
+		cycle_time = 250;
+		use_dma_info = 1;
+		break;
+
+	case XFER_MW_DMA_1:
+		cycle_time = 250;
+		use_dma_info = 1;
+		break;
+
+	case XFER_MW_DMA_0:
+		cycle_time = 480;
+		break;
+
+	case XFER_SW_DMA_2:
+	case XFER_SW_DMA_1:
+	case XFER_SW_DMA_0:
+		cycle_time = 480;
+		break;
+	}
+
+	/*
+	 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
+	 * take care to note the values in the ID...
+	 */
+	if (use_dma_info && drive->id[ATA_ID_EIDE_DMA_TIME] > cycle_time)
+		cycle_time = drive->id[ATA_ID_EIDE_DMA_TIME];
+
+	ide_set_drivedata(drive, (void *)cycle_time);
+
+	printk(KERN_INFO "%s: %s selected (peak %luMB/s)\n",
+	       drive->name, ide_xfer_verbose(xfer_mode),
+	       2000 / (cycle_time ? cycle_time : (unsigned long) -1));
+}
+
+static const struct ide_port_ops icside_v6_port_ops = {
+	.set_dma_mode		= icside_set_dma_mode,
+	.maskproc		= icside_maskproc,
+};
+
+static void icside_dma_host_set(ide_drive_t *drive, int on)
+{
+}
+
+static int icside_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+
+	disable_dma(ec->dma);
+
+	return get_dma_residue(ec->dma) != 0;
+}
+
+static void icside_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+
+	/* We can not enable DMA on both channels simultaneously. */
+	BUG_ON(dma_channel_active(ec->dma));
+	enable_dma(ec->dma);
+}
+
+static int icside_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+	unsigned int dma_mode;
+
+	if (cmd->tf_flags & IDE_TFLAG_WRITE)
+		dma_mode = DMA_MODE_WRITE;
+	else
+		dma_mode = DMA_MODE_READ;
+
+	/*
+	 * We can not enable DMA on both channels.
+	 */
+	BUG_ON(dma_channel_active(ec->dma));
+
+	/*
+	 * Ensure that we have the right interrupt routed.
+	 */
+	icside_maskproc(drive, 0);
+
+	/*
+	 * Route the DMA signals to the correct interface.
+	 */
+	writeb(state->sel | hwif->channel, state->ioc_base);
+
+	/*
+	 * Select the correct timing for this drive.
+	 */
+	set_dma_speed(ec->dma, (unsigned long)ide_get_drivedata(drive));
+
+	/*
+	 * Tell the DMA engine about the SG table and
+	 * data direction.
+	 */
+	set_dma_sg(ec->dma, hwif->sg_table, cmd->sg_nents);
+	set_dma_mode(ec->dma, dma_mode);
+
+	return 0;
+}
+
+static int icside_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct expansion_card *ec = ECARD_DEV(hwif->dev);
+	struct icside_state *state = ecard_get_drvdata(ec);
+
+	return readb(state->irq_port +
+		     (hwif->channel ?
+			ICS_ARCIN_V6_INTRSTAT_2 :
+			ICS_ARCIN_V6_INTRSTAT_1)) & 1;
+}
+
+static int icside_dma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	hwif->dmatable_cpu	= NULL;
+	hwif->dmatable_dma	= 0;
+
+	return 0;
+}
+
+static const struct ide_dma_ops icside_v6_dma_ops = {
+	.dma_host_set		= icside_dma_host_set,
+	.dma_setup		= icside_dma_setup,
+	.dma_start		= icside_dma_start,
+	.dma_end		= icside_dma_end,
+	.dma_test_irq		= icside_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+};
+#endif
+
+static int icside_dma_off_init(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	return -EOPNOTSUPP;
+}
+
+static void icside_setup_ports(struct ide_hw *hw, void __iomem *base,
+			       struct cardinfo *info, struct expansion_card *ec)
+{
+	unsigned long port = (unsigned long)base + info->dataoffset;
+
+	hw->io_ports.data_addr	 = port;
+	hw->io_ports.error_addr	 = port + (1 << info->stepping);
+	hw->io_ports.nsect_addr	 = port + (2 << info->stepping);
+	hw->io_ports.lbal_addr	 = port + (3 << info->stepping);
+	hw->io_ports.lbam_addr	 = port + (4 << info->stepping);
+	hw->io_ports.lbah_addr	 = port + (5 << info->stepping);
+	hw->io_ports.device_addr = port + (6 << info->stepping);
+	hw->io_ports.status_addr = port + (7 << info->stepping);
+	hw->io_ports.ctl_addr	 = (unsigned long)base + info->ctrloffset;
+
+	hw->irq = ec->irq;
+	hw->dev = &ec->dev;
+}
+
+static const struct ide_port_info icside_v5_port_info = {
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.chipset		= ide_acorn,
+};
+
+static int icside_register_v5(struct icside_state *state,
+			      struct expansion_card *ec)
+{
+	void __iomem *base;
+	struct ide_host *host;
+	struct ide_hw hw, *hws[] = { &hw };
+	int ret;
+
+	base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+	if (!base)
+		return -ENOMEM;
+
+	state->irq_port = base;
+
+	ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
+	ec->irqmask  = 1;
+
+	ecard_setirq(ec, &icside_ops_arcin_v5, state);
+
+	/*
+	 * Be on the safe side - disable interrupts
+	 */
+	icside_irqdisable_arcin_v5(ec, 0);
+
+	icside_setup_ports(&hw, base, &icside_cardinfo_v5, ec);
+
+	host = ide_host_alloc(&icside_v5_port_info, hws, 1);
+	if (host == NULL)
+		return -ENODEV;
+
+	state->host = host;
+
+	ecard_set_drvdata(ec, state);
+
+	ret = ide_host_register(host, &icside_v5_port_info, hws);
+	if (ret)
+		goto err_free;
+
+	return 0;
+err_free:
+	ide_host_free(host);
+	ecard_set_drvdata(ec, NULL);
+	return ret;
+}
+
+static const struct ide_port_info icside_v6_port_info = {
+	.init_dma		= icside_dma_off_init,
+	.port_ops		= &icside_v6_no_dma_port_ops,
+	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
+	.mwdma_mask		= ATA_MWDMA2,
+	.swdma_mask		= ATA_SWDMA2,
+	.chipset		= ide_acorn,
+};
+
+static int icside_register_v6(struct icside_state *state,
+			      struct expansion_card *ec)
+{
+	void __iomem *ioc_base, *easi_base;
+	struct ide_host *host;
+	unsigned int sel = 0;
+	int ret;
+	struct ide_hw hw[2], *hws[] = { &hw[0], &hw[1] };
+	struct ide_port_info d = icside_v6_port_info;
+
+	ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+	if (!ioc_base) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	easi_base = ioc_base;
+
+	if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
+		easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
+		if (!easi_base) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		/*
+		 * Enable access to the EASI region.
+		 */
+		sel = 1 << 5;
+	}
+
+	writeb(sel, ioc_base);
+
+	ecard_setirq(ec, &icside_ops_arcin_v6, state);
+
+	state->irq_port   = easi_base;
+	state->ioc_base   = ioc_base;
+	state->sel	  = sel;
+
+	/*
+	 * Be on the safe side - disable interrupts
+	 */
+	icside_irqdisable_arcin_v6(ec, 0);
+
+	icside_setup_ports(&hw[0], easi_base, &icside_cardinfo_v6_1, ec);
+	icside_setup_ports(&hw[1], easi_base, &icside_cardinfo_v6_2, ec);
+
+	host = ide_host_alloc(&d, hws, 2);
+	if (host == NULL)
+		return -ENODEV;
+
+	state->host = host;
+
+	ecard_set_drvdata(ec, state);
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_ICS
+	if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
+		d.init_dma = icside_dma_init;
+		d.port_ops = &icside_v6_port_ops;
+		d.dma_ops  = &icside_v6_dma_ops;
+	}
+#endif
+
+	ret = ide_host_register(host, &d, hws);
+	if (ret)
+		goto err_free;
+
+	return 0;
+err_free:
+	ide_host_free(host);
+	if (d.dma_ops)
+		free_dma(ec->dma);
+	ecard_set_drvdata(ec, NULL);
+out:
+	return ret;
+}
+
+static int icside_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+	struct icside_state *state;
+	void __iomem *idmem;
+	int ret;
+
+	ret = ecard_request_resources(ec);
+	if (ret)
+		goto out;
+
+	state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
+	if (!state) {
+		ret = -ENOMEM;
+		goto release;
+	}
+
+	state->type	= ICS_TYPE_NOTYPE;
+
+	idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
+	if (idmem) {
+		unsigned int type;
+
+		type = readb(idmem + ICS_IDENT_OFFSET) & 1;
+		type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
+		type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
+		type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
+		ecardm_iounmap(ec, idmem);
+
+		state->type = type;
+	}
+
+	switch (state->type) {
+	case ICS_TYPE_A3IN:
+		dev_warn(&ec->dev, "A3IN unsupported\n");
+		ret = -ENODEV;
+		break;
+
+	case ICS_TYPE_A3USER:
+		dev_warn(&ec->dev, "A3USER unsupported\n");
+		ret = -ENODEV;
+		break;
+
+	case ICS_TYPE_V5:
+		ret = icside_register_v5(state, ec);
+		break;
+
+	case ICS_TYPE_V6:
+		ret = icside_register_v6(state, ec);
+		break;
+
+	default:
+		dev_warn(&ec->dev, "unknown interface type\n");
+		ret = -ENODEV;
+		break;
+	}
+
+	if (ret == 0)
+		goto out;
+
+	kfree(state);
+ release:
+	ecard_release_resources(ec);
+ out:
+	return ret;
+}
+
+static void icside_remove(struct expansion_card *ec)
+{
+	struct icside_state *state = ecard_get_drvdata(ec);
+
+	switch (state->type) {
+	case ICS_TYPE_V5:
+		/* FIXME: tell IDE to stop using the interface */
+
+		/* Disable interrupts */
+		icside_irqdisable_arcin_v5(ec, 0);
+		break;
+
+	case ICS_TYPE_V6:
+		/* FIXME: tell IDE to stop using the interface */
+		if (ec->dma != NO_DMA)
+			free_dma(ec->dma);
+
+		/* Disable interrupts */
+		icside_irqdisable_arcin_v6(ec, 0);
+
+		/* Reset the ROM pointer/EASI selection */
+		writeb(0, state->ioc_base);
+		break;
+	}
+
+	ecard_set_drvdata(ec, NULL);
+
+	kfree(state);
+	ecard_release_resources(ec);
+}
+
+static void icside_shutdown(struct expansion_card *ec)
+{
+	struct icside_state *state = ecard_get_drvdata(ec);
+	unsigned long flags;
+
+	/*
+	 * Disable interrupts from this card.  We need to do
+	 * this before disabling EASI since we may be accessing
+	 * this register via that region.
+	 */
+	local_irq_save(flags);
+	ec->ops->irqdisable(ec, 0);
+	local_irq_restore(flags);
+
+	/*
+	 * Reset the ROM pointer so that we can read the ROM
+	 * after a soft reboot.  This also disables access to
+	 * the IDE taskfile via the EASI region.
+	 */
+	if (state->ioc_base)
+		writeb(0, state->ioc_base);
+}
+
+static const struct ecard_id icside_ids[] = {
+	{ MANU_ICS,  PROD_ICS_IDE  },
+	{ MANU_ICS2, PROD_ICS2_IDE },
+	{ 0xffff, 0xffff }
+};
+
+static struct ecard_driver icside_driver = {
+	.probe		= icside_probe,
+	.remove		= icside_remove,
+	.shutdown	= icside_shutdown,
+	.id_table	= icside_ids,
+	.drv = {
+		.name	= "icside",
+	},
+};
+
+static int __init icside_init(void)
+{
+	return ecard_register_driver(&icside_driver);
+}
+
+static void __exit icside_exit(void)
+{
+	ecard_remove_driver(&icside_driver);
+}
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ICS IDE driver");
+
+module_init(icside_init);
+module_exit(icside_exit);
diff --git a/drivers/ide/ide-4drives.c b/drivers/ide/ide-4drives.c
new file mode 100644
index 000000000..06c6215e0
--- /dev/null
+++ b/drivers/ide/ide-4drives.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+#define DRV_NAME "ide-4drives"
+
+static bool probe_4drives;
+
+module_param_named(probe, probe_4drives, bool, 0);
+MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
+
+static void ide_4drives_init_dev(ide_drive_t *drive)
+{
+	if (drive->hwif->channel)
+		drive->select ^= 0x20;
+}
+
+static const struct ide_port_ops ide_4drives_port_ops = {
+	.init_dev		= ide_4drives_init_dev,
+};
+
+static const struct ide_port_info ide_4drives_port_info = {
+	.port_ops		= &ide_4drives_port_ops,
+	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_4DRIVES,
+	.chipset		= ide_4drives,
+};
+
+static int __init ide_4drives_init(void)
+{
+	unsigned long base = 0x1f0, ctl = 0x3f6;
+	struct ide_hw hw, *hws[] = { &hw, &hw };
+
+	if (probe_4drives == 0)
+		return -ENODEV;
+
+	if (!request_region(base, 8, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				DRV_NAME, base, base + 7);
+		return -EBUSY;
+	}
+
+	if (!request_region(ctl, 1, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+				DRV_NAME, ctl);
+		release_region(base, 8);
+		return -EBUSY;
+	}
+
+	memset(&hw, 0, sizeof(hw));
+
+	ide_std_init_ports(&hw, base, ctl);
+	hw.irq = 14;
+
+	return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
+}
+
+module_init(ide_4drives_init);
+
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
new file mode 100644
index 000000000..05e18d658
--- /dev/null
+++ b/drivers/ide/ide-acpi.c
@@ -0,0 +1,622 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Provides ACPI support for IDE drives.
+ *
+ * Copyright (C) 2005 Intel Corp.
+ * Copyright (C) 2005 Randy Dunlap
+ * Copyright (C) 2006 SUSE Linux Products GmbH
+ * Copyright (C) 2006 Hannes Reinecke
+ */
+
+#include <linux/acpi.h>
+#include <linux/ata.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/ide.h>
+#include <linux/pci.h>
+#include <linux/dmi.h>
+#include <linux/module.h>
+
+#define REGS_PER_GTF		7
+
+struct GTM_buffer {
+	u32	PIO_speed0;
+	u32	DMA_speed0;
+	u32	PIO_speed1;
+	u32	DMA_speed1;
+	u32	GTM_flags;
+};
+
+struct ide_acpi_drive_link {
+	acpi_handle	 obj_handle;
+	u8		 idbuff[512];
+};
+
+struct ide_acpi_hwif_link {
+	ide_hwif_t			*hwif;
+	acpi_handle			 obj_handle;
+	struct GTM_buffer		 gtm;
+	struct ide_acpi_drive_link	 master;
+	struct ide_acpi_drive_link	 slave;
+};
+
+#undef DEBUGGING
+/* note: adds function name and KERN_DEBUG */
+#ifdef DEBUGGING
+#define DEBPRINT(fmt, args...)	\
+		printk(KERN_DEBUG "%s: " fmt, __func__, ## args)
+#else
+#define DEBPRINT(fmt, args...)	do {} while (0)
+#endif	/* DEBUGGING */
+
+static bool ide_noacpi;
+module_param_named(noacpi, ide_noacpi, bool, 0);
+MODULE_PARM_DESC(noacpi, "disable IDE ACPI support");
+
+static bool ide_acpigtf;
+module_param_named(acpigtf, ide_acpigtf, bool, 0);
+MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support");
+
+static bool ide_acpionboot;
+module_param_named(acpionboot, ide_acpionboot, bool, 0);
+MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot");
+
+static bool ide_noacpi_psx;
+static int no_acpi_psx(const struct dmi_system_id *id)
+{
+	ide_noacpi_psx = true;
+	printk(KERN_NOTICE"%s detected - disable ACPI _PSx.\n", id->ident);
+	return 0;
+}
+
+static const struct dmi_system_id ide_acpi_dmi_table[] = {
+	/* Bug 9673. */
+	/* We should check if this is because ACPI NVS isn't save/restored. */
+	{
+		.callback = no_acpi_psx,
+		.ident    = "HP nx9005",
+		.matches  = {
+			DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies Ltd."),
+			DMI_MATCH(DMI_BIOS_VERSION, "KAM1.60")
+		},
+	},
+
+	{ }	/* terminate list */
+};
+
+int ide_acpi_init(void)
+{
+	dmi_check_system(ide_acpi_dmi_table);
+	return 0;
+}
+
+bool ide_port_acpi(ide_hwif_t *hwif)
+{
+	return ide_noacpi == 0 && hwif->acpidata;
+}
+
+static acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
+{
+	struct acpi_device *adev;
+
+	if (!handle || acpi_bus_get_device(handle, &adev))
+		return NULL;
+
+	adev = acpi_find_child_device(adev, addr, false);
+	return adev ? adev->handle : NULL;
+}
+
+/**
+ * ide_get_dev_handle - finds acpi_handle and PCI device.function
+ * @dev: device to locate
+ * @handle: returned acpi_handle for @dev
+ * @pcidevfn: return PCI device.func for @dev
+ *
+ * Returns the ACPI object handle to the corresponding PCI device.
+ *
+ * Returns 0 on success, <0 on error.
+ */
+static int ide_get_dev_handle(struct device *dev, acpi_handle *handle,
+			       u64 *pcidevfn)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned int bus, devnum, func;
+	u64 addr;
+	acpi_handle dev_handle;
+	acpi_status status;
+	struct acpi_device_info	*dinfo = NULL;
+	int ret = -ENODEV;
+
+	bus = pdev->bus->number;
+	devnum = PCI_SLOT(pdev->devfn);
+	func = PCI_FUNC(pdev->devfn);
+	/* ACPI _ADR encoding for PCI bus: */
+	addr = (u64)(devnum << 16 | func);
+
+	DEBPRINT("ENTER: pci %02x:%02x.%01x\n", bus, devnum, func);
+
+	dev_handle = ACPI_HANDLE(dev);
+	if (!dev_handle) {
+		DEBPRINT("no acpi handle for device\n");
+		goto err;
+	}
+
+	status = acpi_get_object_info(dev_handle, &dinfo);
+	if (ACPI_FAILURE(status)) {
+		DEBPRINT("get_object_info for device failed\n");
+		goto err;
+	}
+	if (dinfo && (dinfo->valid & ACPI_VALID_ADR) &&
+	    dinfo->address == addr) {
+		*pcidevfn = addr;
+		*handle = dev_handle;
+	} else {
+		DEBPRINT("get_object_info for device has wrong "
+			" address: %llu, should be %u\n",
+			dinfo ? (unsigned long long)dinfo->address : -1ULL,
+			(unsigned int)addr);
+		goto err;
+	}
+
+	DEBPRINT("for dev=0x%x.%x, addr=0x%llx, *handle=0x%p\n",
+		 devnum, func, (unsigned long long)addr, *handle);
+	ret = 0;
+err:
+	kfree(dinfo);
+	return ret;
+}
+
+/**
+ * ide_acpi_hwif_get_handle - Get ACPI object handle for a given hwif
+ * @hwif: device to locate
+ *
+ * Retrieves the object handle for a given hwif.
+ *
+ * Returns handle on success, 0 on error.
+ */
+static acpi_handle ide_acpi_hwif_get_handle(ide_hwif_t *hwif)
+{
+	struct device		*dev = hwif->gendev.parent;
+	acpi_handle		dev_handle;
+	u64			pcidevfn;
+	acpi_handle		chan_handle;
+	int			err;
+
+	DEBPRINT("ENTER: device %s\n", hwif->name);
+
+	if (!dev) {
+		DEBPRINT("no PCI device for %s\n", hwif->name);
+		return NULL;
+	}
+
+	err = ide_get_dev_handle(dev, &dev_handle, &pcidevfn);
+	if (err < 0) {
+		DEBPRINT("ide_get_dev_handle failed (%d)\n", err);
+		return NULL;
+	}
+
+	/* get child objects of dev_handle == channel objects,
+	 * + _their_ children == drive objects */
+	/* channel is hwif->channel */
+	chan_handle = acpi_get_child(dev_handle, hwif->channel);
+	DEBPRINT("chan adr=%d: handle=0x%p\n",
+		 hwif->channel, chan_handle);
+
+	return chan_handle;
+}
+
+/**
+ * do_drive_get_GTF - get the drive bootup default taskfile settings
+ * @drive: the drive for which the taskfile settings should be retrieved
+ * @gtf_length: number of bytes of _GTF data returned at @gtf_address
+ * @gtf_address: buffer containing _GTF taskfile arrays
+ *
+ * The _GTF method has no input parameters.
+ * It returns a variable number of register set values (registers
+ * hex 1F1..1F7, taskfiles).
+ * The <variable number> is not known in advance, so have ACPI-CA
+ * allocate the buffer as needed and return it, then free it later.
+ *
+ * The returned @gtf_length and @gtf_address are only valid if the
+ * function return value is 0.
+ */
+static int do_drive_get_GTF(ide_drive_t *drive,
+		     unsigned int *gtf_length, unsigned long *gtf_address,
+		     unsigned long *obj_loc)
+{
+	acpi_status			status;
+	struct acpi_buffer		output;
+	union acpi_object 		*out_obj;
+	int				err = -ENODEV;
+
+	*gtf_length = 0;
+	*gtf_address = 0UL;
+	*obj_loc = 0UL;
+
+	if (!drive->acpidata->obj_handle) {
+		DEBPRINT("No ACPI object found for %s\n", drive->name);
+		goto out;
+	}
+
+	/* Setting up output buffer */
+	output.length = ACPI_ALLOCATE_BUFFER;
+	output.pointer = NULL;	/* ACPI-CA sets this; save/free it later */
+
+	/* _GTF has no input parameters */
+	err = -EIO;
+	status = acpi_evaluate_object(drive->acpidata->obj_handle, "_GTF",
+				      NULL, &output);
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_DEBUG
+		       "%s: Run _GTF error: status = 0x%x\n",
+		       __func__, status);
+		goto out;
+	}
+
+	if (!output.length || !output.pointer) {
+		DEBPRINT("Run _GTF: "
+		       "length or ptr is NULL (0x%llx, 0x%p)\n",
+		       (unsigned long long)output.length,
+		       output.pointer);
+		goto out;
+	}
+
+	out_obj = output.pointer;
+	if (out_obj->type != ACPI_TYPE_BUFFER) {
+		DEBPRINT("Run _GTF: error: "
+		       "expected object type of ACPI_TYPE_BUFFER, "
+		       "got 0x%x\n", out_obj->type);
+		err = -ENOENT;
+		kfree(output.pointer);
+		goto out;
+	}
+
+	if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
+	    out_obj->buffer.length % REGS_PER_GTF) {
+		printk(KERN_ERR
+		       "%s: unexpected GTF length (%d) or addr (0x%p)\n",
+		       __func__, out_obj->buffer.length,
+		       out_obj->buffer.pointer);
+		err = -ENOENT;
+		kfree(output.pointer);
+		goto out;
+	}
+
+	*gtf_length = out_obj->buffer.length;
+	*gtf_address = (unsigned long)out_obj->buffer.pointer;
+	*obj_loc = (unsigned long)out_obj;
+	DEBPRINT("returning gtf_length=%d, gtf_address=0x%lx, obj_loc=0x%lx\n",
+		 *gtf_length, *gtf_address, *obj_loc);
+	err = 0;
+out:
+	return err;
+}
+
+/**
+ * do_drive_set_taskfiles - write the drive taskfile settings from _GTF
+ * @drive: the drive to which the taskfile command should be sent
+ * @gtf_length: total number of bytes of _GTF taskfiles
+ * @gtf_address: location of _GTF taskfile arrays
+ *
+ * Write {gtf_address, length gtf_length} in groups of
+ * REGS_PER_GTF bytes.
+ */
+static int do_drive_set_taskfiles(ide_drive_t *drive,
+				  unsigned int gtf_length,
+				  unsigned long gtf_address)
+{
+	int			rc = 0, err;
+	int			gtf_count = gtf_length / REGS_PER_GTF;
+	int			ix;
+
+	DEBPRINT("total GTF bytes=%u (0x%x), gtf_count=%d, addr=0x%lx\n",
+		 gtf_length, gtf_length, gtf_count, gtf_address);
+
+	/* send all taskfile registers (0x1f1-0x1f7) *in*that*order* */
+	for (ix = 0; ix < gtf_count; ix++) {
+		u8 *gtf = (u8 *)(gtf_address + ix * REGS_PER_GTF);
+		struct ide_cmd cmd;
+
+		DEBPRINT("(0x1f1-1f7): "
+			 "hex: %02x %02x %02x %02x %02x %02x %02x\n",
+			 gtf[0], gtf[1], gtf[2],
+			 gtf[3], gtf[4], gtf[5], gtf[6]);
+
+		if (!ide_acpigtf) {
+			DEBPRINT("_GTF execution disabled\n");
+			continue;
+		}
+
+		/* convert GTF to taskfile */
+		memset(&cmd, 0, sizeof(cmd));
+		memcpy(&cmd.tf.feature, gtf, REGS_PER_GTF);
+		cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+		cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+		err = ide_no_data_taskfile(drive, &cmd);
+		if (err) {
+			printk(KERN_ERR "%s: ide_no_data_taskfile failed: %u\n",
+					__func__, err);
+			rc = err;
+		}
+	}
+
+	return rc;
+}
+
+/**
+ * ide_acpi_exec_tfs - get then write drive taskfile settings
+ * @drive: the drive for which the taskfile settings should be
+ *         written.
+ *
+ * According to the ACPI spec this should be called after _STM
+ * has been evaluated for the interface. Some ACPI vendors interpret
+ * that as a hard requirement and modify the taskfile according
+ * to the Identify Drive information passed down with _STM.
+ * So one should really make sure to call this only after _STM has
+ * been executed.
+ */
+int ide_acpi_exec_tfs(ide_drive_t *drive)
+{
+	int		ret;
+	unsigned int	gtf_length;
+	unsigned long	gtf_address;
+	unsigned long	obj_loc;
+
+	DEBPRINT("call get_GTF, drive=%s port=%d\n", drive->name, drive->dn);
+
+	ret = do_drive_get_GTF(drive, &gtf_length, &gtf_address, &obj_loc);
+	if (ret < 0) {
+		DEBPRINT("get_GTF error (%d)\n", ret);
+		return ret;
+	}
+
+	DEBPRINT("call set_taskfiles, drive=%s\n", drive->name);
+
+	ret = do_drive_set_taskfiles(drive, gtf_length, gtf_address);
+	kfree((void *)obj_loc);
+	if (ret < 0) {
+		DEBPRINT("set_taskfiles error (%d)\n", ret);
+	}
+
+	DEBPRINT("ret=%d\n", ret);
+
+	return ret;
+}
+
+/**
+ * ide_acpi_get_timing - get the channel (controller) timings
+ * @hwif: target IDE interface (channel)
+ *
+ * This function executes the _GTM ACPI method for the target channel.
+ *
+ */
+void ide_acpi_get_timing(ide_hwif_t *hwif)
+{
+	acpi_status		status;
+	struct acpi_buffer	output;
+	union acpi_object 	*out_obj;
+
+	/* Setting up output buffer for _GTM */
+	output.length = ACPI_ALLOCATE_BUFFER;
+	output.pointer = NULL;	/* ACPI-CA sets this; save/free it later */
+
+	/* _GTM has no input parameters */
+	status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_GTM",
+				      NULL, &output);
+
+	DEBPRINT("_GTM status: %d, outptr: 0x%p, outlen: 0x%llx\n",
+		 status, output.pointer,
+		 (unsigned long long)output.length);
+
+	if (ACPI_FAILURE(status)) {
+		DEBPRINT("Run _GTM error: status = 0x%x\n", status);
+		return;
+	}
+
+	if (!output.length || !output.pointer) {
+		DEBPRINT("Run _GTM: length or ptr is NULL (0x%llx, 0x%p)\n",
+		       (unsigned long long)output.length,
+		       output.pointer);
+		kfree(output.pointer);
+		return;
+	}
+
+	out_obj = output.pointer;
+	if (out_obj->type != ACPI_TYPE_BUFFER) {
+		DEBPRINT("Run _GTM: error: "
+		       "expected object type of ACPI_TYPE_BUFFER, "
+		       "got 0x%x\n", out_obj->type);
+		kfree(output.pointer);
+		return;
+	}
+
+	if (!out_obj->buffer.length || !out_obj->buffer.pointer ||
+	    out_obj->buffer.length != sizeof(struct GTM_buffer)) {
+		printk(KERN_ERR
+			"%s: unexpected _GTM length (0x%x)[should be 0x%zx] or "
+			"addr (0x%p)\n",
+			__func__, out_obj->buffer.length,
+			sizeof(struct GTM_buffer), out_obj->buffer.pointer);
+		kfree(output.pointer);
+		return;
+	}
+
+	memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer,
+	       sizeof(struct GTM_buffer));
+
+	DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%zx\n",
+		 out_obj->buffer.pointer, out_obj->buffer.length,
+		 sizeof(struct GTM_buffer));
+
+	DEBPRINT("_GTM fields: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x\n",
+		 hwif->acpidata->gtm.PIO_speed0,
+		 hwif->acpidata->gtm.DMA_speed0,
+		 hwif->acpidata->gtm.PIO_speed1,
+		 hwif->acpidata->gtm.DMA_speed1,
+		 hwif->acpidata->gtm.GTM_flags);
+
+	kfree(output.pointer);
+}
+
+/**
+ * ide_acpi_push_timing - set the channel (controller) timings
+ * @hwif: target IDE interface (channel)
+ *
+ * This function executes the _STM ACPI method for the target channel.
+ *
+ * _STM requires Identify Drive data, which has to passed as an argument.
+ * Unfortunately drive->id is a mangled version which we can't readily
+ * use; hence we'll get the information afresh.
+ */
+void ide_acpi_push_timing(ide_hwif_t *hwif)
+{
+	acpi_status		status;
+	struct acpi_object_list	input;
+	union acpi_object 	in_params[3];
+	struct ide_acpi_drive_link	*master = &hwif->acpidata->master;
+	struct ide_acpi_drive_link	*slave = &hwif->acpidata->slave;
+
+	/* Give the GTM buffer + drive Identify data to the channel via the
+	 * _STM method: */
+	/* setup input parameters buffer for _STM */
+	input.count = 3;
+	input.pointer = in_params;
+	in_params[0].type = ACPI_TYPE_BUFFER;
+	in_params[0].buffer.length = sizeof(struct GTM_buffer);
+	in_params[0].buffer.pointer = (u8 *)&hwif->acpidata->gtm;
+	in_params[1].type = ACPI_TYPE_BUFFER;
+	in_params[1].buffer.length = ATA_ID_WORDS * 2;
+	in_params[1].buffer.pointer = (u8 *)&master->idbuff;
+	in_params[2].type = ACPI_TYPE_BUFFER;
+	in_params[2].buffer.length = ATA_ID_WORDS * 2;
+	in_params[2].buffer.pointer = (u8 *)&slave->idbuff;
+	/* Output buffer: _STM has no output */
+
+	status = acpi_evaluate_object(hwif->acpidata->obj_handle, "_STM",
+				      &input, NULL);
+
+	if (ACPI_FAILURE(status)) {
+		DEBPRINT("Run _STM error: status = 0x%x\n", status);
+	}
+	DEBPRINT("_STM status: %d\n", status);
+}
+
+/**
+ * ide_acpi_set_state - set the channel power state
+ * @hwif: target IDE interface
+ * @on: state, on/off
+ *
+ * This function executes the _PS0/_PS3 ACPI method to set the power state.
+ * ACPI spec requires _PS0 when IDE power on and _PS3 when power off
+ */
+void ide_acpi_set_state(ide_hwif_t *hwif, int on)
+{
+	ide_drive_t *drive;
+	int i;
+
+	if (ide_noacpi_psx)
+		return;
+
+	DEBPRINT("ENTER:\n");
+
+	/* channel first and then drives for power on and verse versa for power off */
+	if (on)
+		acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		if (drive->acpidata->obj_handle)
+			acpi_bus_set_power(drive->acpidata->obj_handle,
+				on ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD);
+	}
+
+	if (!on)
+		acpi_bus_set_power(hwif->acpidata->obj_handle,
+				   ACPI_STATE_D3_COLD);
+}
+
+/**
+ * ide_acpi_init_port - initialize the ACPI link for an IDE interface
+ * @hwif: target IDE interface (channel)
+ *
+ * The ACPI spec is not quite clear when the drive identify buffer
+ * should be obtained. Calling IDENTIFY DEVICE during shutdown
+ * is not the best of ideas as the drive might already being put to
+ * sleep. And obviously we can't call it during resume.
+ * So we get the information during startup; but this means that
+ * any changes during run-time will be lost after resume.
+ */
+void ide_acpi_init_port(ide_hwif_t *hwif)
+{
+	hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL);
+	if (!hwif->acpidata)
+		return;
+
+	hwif->acpidata->obj_handle = ide_acpi_hwif_get_handle(hwif);
+	if (!hwif->acpidata->obj_handle) {
+		DEBPRINT("no ACPI object for %s found\n", hwif->name);
+		kfree(hwif->acpidata);
+		hwif->acpidata = NULL;
+	}
+}
+
+void ide_acpi_port_init_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i, err;
+
+	if (hwif->acpidata == NULL)
+		return;
+
+	/*
+	 * The ACPI spec mandates that we send information
+	 * for both drives, regardless whether they are connected
+	 * or not.
+	 */
+	hwif->devices[0]->acpidata = &hwif->acpidata->master;
+	hwif->devices[1]->acpidata = &hwif->acpidata->slave;
+
+	/* get _ADR info for each device */
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		acpi_handle dev_handle;
+
+		DEBPRINT("ENTER: %s at channel#: %d port#: %d\n",
+			 drive->name, hwif->channel, drive->dn & 1);
+
+		/* TBD: could also check ACPI object VALID bits */
+		dev_handle = acpi_get_child(hwif->acpidata->obj_handle,
+					    drive->dn & 1);
+
+		DEBPRINT("drive %s handle 0x%p\n", drive->name, dev_handle);
+
+		drive->acpidata->obj_handle = dev_handle;
+	}
+
+	/* send IDENTIFY for each device */
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
+		if (err)
+			DEBPRINT("identify device %s failed (%d)\n",
+				 drive->name, err);
+	}
+
+	if (ide_noacpi || ide_acpionboot == 0) {
+		DEBPRINT("ACPI methods disabled on boot\n");
+		return;
+	}
+
+	/* ACPI _PS0 before _STM */
+	ide_acpi_set_state(hwif, 1);
+	/*
+	 * ACPI requires us to call _STM on startup
+	 */
+	ide_acpi_get_timing(hwif);
+	ide_acpi_push_timing(hwif);
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		ide_acpi_exec_tfs(drive);
+	}
+}
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
new file mode 100644
index 000000000..013ad33fb
--- /dev/null
+++ b/drivers/ide/ide-atapi.c
@@ -0,0 +1,756 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ATAPI support.
+ */
+
+#include <linux/kernel.h>
+#include <linux/cdrom.h>
+#include <linux/delay.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+#include <linux/scatterlist.h>
+#include <linux/gfp.h>
+
+#include <scsi/scsi.h>
+
+#define DRV_NAME "ide-atapi"
+#define PFX DRV_NAME ": "
+
+#ifdef DEBUG
+#define debug_log(fmt, args...) \
+	printk(KERN_INFO "ide: " fmt, ## args)
+#else
+#define debug_log(fmt, args...) do {} while (0)
+#endif
+
+#define ATAPI_MIN_CDB_BYTES	12
+
+static inline int dev_is_idecd(ide_drive_t *drive)
+{
+	return drive->media == ide_cdrom || drive->media == ide_optical;
+}
+
+/*
+ * Check whether we can support a device,
+ * based on the ATAPI IDENTIFY command results.
+ */
+int ide_check_atapi_device(ide_drive_t *drive, const char *s)
+{
+	u16 *id = drive->id;
+	u8 gcw[2], protocol, device_type, removable, drq_type, packet_size;
+
+	*((u16 *)&gcw) = id[ATA_ID_CONFIG];
+
+	protocol    = (gcw[1] & 0xC0) >> 6;
+	device_type =  gcw[1] & 0x1F;
+	removable   = (gcw[0] & 0x80) >> 7;
+	drq_type    = (gcw[0] & 0x60) >> 5;
+	packet_size =  gcw[0] & 0x03;
+
+#ifdef CONFIG_PPC
+	/* kludge for Apple PowerBook internal zip */
+	if (drive->media == ide_floppy && device_type == 5 &&
+	    !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") &&
+	    strstr((char *)&id[ATA_ID_PROD], "ZIP"))
+		device_type = 0;
+#endif
+
+	if (protocol != 2)
+		printk(KERN_ERR "%s: %s: protocol (0x%02x) is not ATAPI\n",
+			s, drive->name, protocol);
+	else if ((drive->media == ide_floppy && device_type != 0) ||
+		 (drive->media == ide_tape && device_type != 1))
+		printk(KERN_ERR "%s: %s: invalid device type (0x%02x)\n",
+			s, drive->name, device_type);
+	else if (removable == 0)
+		printk(KERN_ERR "%s: %s: the removable flag is not set\n",
+			s, drive->name);
+	else if (drive->media == ide_floppy && drq_type == 3)
+		printk(KERN_ERR "%s: %s: sorry, DRQ type (0x%02x) not "
+			"supported\n", s, drive->name, drq_type);
+	else if (packet_size != 0)
+		printk(KERN_ERR "%s: %s: packet size (0x%02x) is not 12 "
+			"bytes\n", s, drive->name, packet_size);
+	else
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_check_atapi_device);
+
+void ide_init_pc(struct ide_atapi_pc *pc)
+{
+	memset(pc, 0, sizeof(*pc));
+}
+EXPORT_SYMBOL_GPL(ide_init_pc);
+
+/*
+ * Add a special packet command request to the tail of the request queue,
+ * and wait for it to be serviced.
+ */
+int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
+		      struct ide_atapi_pc *pc, void *buf, unsigned int bufflen)
+{
+	struct request *rq;
+	int error;
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	ide_req(rq)->special = pc;
+
+	if (buf && bufflen) {
+		error = blk_rq_map_kern(drive->queue, rq, buf, bufflen,
+					GFP_NOIO);
+		if (error)
+			goto put_req;
+	}
+
+	memcpy(scsi_req(rq)->cmd, pc->c, 12);
+	if (drive->media == ide_tape)
+		scsi_req(rq)->cmd[13] = REQ_IDETAPE_PC1;
+	blk_execute_rq(drive->queue, disk, rq, 0);
+	error = scsi_req(rq)->result ? -EIO : 0;
+put_req:
+	blk_put_request(rq);
+	return error;
+}
+EXPORT_SYMBOL_GPL(ide_queue_pc_tail);
+
+int ide_do_test_unit_ready(ide_drive_t *drive, struct gendisk *disk)
+{
+	struct ide_atapi_pc pc;
+
+	ide_init_pc(&pc);
+	pc.c[0] = TEST_UNIT_READY;
+
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(ide_do_test_unit_ready);
+
+int ide_do_start_stop(ide_drive_t *drive, struct gendisk *disk, int start)
+{
+	struct ide_atapi_pc pc;
+
+	ide_init_pc(&pc);
+	pc.c[0] = START_STOP;
+	pc.c[4] = start;
+
+	if (drive->media == ide_tape)
+		pc.flags |= PC_FLAG_WAIT_FOR_DSC;
+
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(ide_do_start_stop);
+
+int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
+{
+	struct ide_atapi_pc pc;
+
+	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
+		return 0;
+
+	ide_init_pc(&pc);
+	pc.c[0] = ALLOW_MEDIUM_REMOVAL;
+	pc.c[4] = on;
+
+	return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(ide_set_media_lock);
+
+void ide_create_request_sense_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc)
+{
+	ide_init_pc(pc);
+	pc->c[0] = REQUEST_SENSE;
+	if (drive->media == ide_floppy) {
+		pc->c[4] = 255;
+		pc->req_xfer = 18;
+	} else {
+		pc->c[4] = 20;
+		pc->req_xfer = 20;
+	}
+}
+EXPORT_SYMBOL_GPL(ide_create_request_sense_cmd);
+
+void ide_prep_sense(ide_drive_t *drive, struct request *rq)
+{
+	struct request_sense *sense = &drive->sense_data;
+	struct request *sense_rq;
+	struct scsi_request *req;
+	unsigned int cmd_len, sense_len;
+	int err;
+
+	switch (drive->media) {
+	case ide_floppy:
+		cmd_len = 255;
+		sense_len = 18;
+		break;
+	case ide_tape:
+		cmd_len = 20;
+		sense_len = 20;
+		break;
+	default:
+		cmd_len = 18;
+		sense_len = 18;
+	}
+
+	BUG_ON(sense_len > sizeof(*sense));
+
+	if (ata_sense_request(rq) || drive->sense_rq_armed)
+		return;
+
+	sense_rq = drive->sense_rq;
+	if (!sense_rq) {
+		sense_rq = blk_mq_alloc_request(drive->queue, REQ_OP_DRV_IN,
+					BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT);
+		drive->sense_rq = sense_rq;
+	}
+	req = scsi_req(sense_rq);
+
+	memset(sense, 0, sizeof(*sense));
+
+	scsi_req_init(req);
+
+	err = blk_rq_map_kern(drive->queue, sense_rq, sense, sense_len,
+			      GFP_NOIO);
+	if (unlikely(err)) {
+		if (printk_ratelimit())
+			printk(KERN_WARNING PFX "%s: failed to map sense "
+					    "buffer\n", drive->name);
+		blk_mq_free_request(sense_rq);
+		drive->sense_rq = NULL;
+		return;
+	}
+
+	sense_rq->rq_disk = rq->rq_disk;
+	sense_rq->cmd_flags = REQ_OP_DRV_IN;
+	ide_req(sense_rq)->type = ATA_PRIV_SENSE;
+
+	req->cmd[0] = GPCMD_REQUEST_SENSE;
+	req->cmd[4] = cmd_len;
+	if (drive->media == ide_tape)
+		req->cmd[13] = REQ_IDETAPE_PC1;
+
+	drive->sense_rq_armed = true;
+}
+EXPORT_SYMBOL_GPL(ide_prep_sense);
+
+int ide_queue_sense_rq(ide_drive_t *drive, void *special)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *sense_rq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+
+	/* deferred failure from ide_prep_sense() */
+	if (!drive->sense_rq_armed) {
+		printk(KERN_WARNING PFX "%s: error queuing a sense request\n",
+		       drive->name);
+		spin_unlock_irqrestore(&hwif->lock, flags);
+		return -ENOMEM;
+	}
+
+	sense_rq = drive->sense_rq;
+	ide_req(sense_rq)->special = special;
+	drive->sense_rq_armed = false;
+
+	drive->hwif->rq = NULL;
+
+	ide_insert_request_head(drive, sense_rq);
+	spin_unlock_irqrestore(&hwif->lock, flags);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
+
+/*
+ * Called when an error was detected during the last packet command.
+ * We queue a request sense packet command at the head of the request
+ * queue.
+ */
+void ide_retry_pc(ide_drive_t *drive)
+{
+	struct request *failed_rq = drive->hwif->rq;
+	struct request *sense_rq = drive->sense_rq;
+	struct ide_atapi_pc *pc = &drive->request_sense_pc;
+
+	(void)ide_read_error(drive);
+
+	/* init pc from sense_rq */
+	ide_init_pc(pc);
+	memcpy(pc->c, scsi_req(sense_rq)->cmd, 12);
+
+	if (drive->media == ide_tape)
+		drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
+
+	/*
+	 * Push back the failed request and put request sense on top
+	 * of it.  The failed command will be retried after sense data
+	 * is acquired.
+	 */
+	drive->hwif->rq = NULL;
+	ide_requeue_and_plug(drive, failed_rq);
+	if (ide_queue_sense_rq(drive, pc))
+		ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(failed_rq));
+}
+EXPORT_SYMBOL_GPL(ide_retry_pc);
+
+int ide_cd_expiry(ide_drive_t *drive)
+{
+	struct request *rq = drive->hwif->rq;
+	unsigned long wait = 0;
+
+	debug_log("%s: scsi_req(rq)->cmd[0]: 0x%x\n", __func__, scsi_req(rq)->cmd[0]);
+
+	/*
+	 * Some commands are *slow* and normally take a long time to complete.
+	 * Usually we can use the ATAPI "disconnect" to bypass this, but not all
+	 * commands/drives support that. Let ide_timer_expiry keep polling us
+	 * for these.
+	 */
+	switch (scsi_req(rq)->cmd[0]) {
+	case GPCMD_BLANK:
+	case GPCMD_FORMAT_UNIT:
+	case GPCMD_RESERVE_RZONE_TRACK:
+	case GPCMD_CLOSE_TRACK:
+	case GPCMD_FLUSH_CACHE:
+		wait = ATAPI_WAIT_PC;
+		break;
+	default:
+		if (!(rq->rq_flags & RQF_QUIET))
+			printk(KERN_INFO PFX "cmd 0x%x timed out\n",
+					 scsi_req(rq)->cmd[0]);
+		wait = 0;
+		break;
+	}
+	return wait;
+}
+EXPORT_SYMBOL_GPL(ide_cd_expiry);
+
+int ide_cd_get_xferlen(struct request *rq)
+{
+	switch (req_op(rq)) {
+	default:
+		return 32768;
+	case REQ_OP_SCSI_IN:
+	case REQ_OP_SCSI_OUT:
+		return blk_rq_bytes(rq);
+	case REQ_OP_DRV_IN:
+	case REQ_OP_DRV_OUT:
+		switch (ide_req(rq)->type) {
+		case ATA_PRIV_PC:
+		case ATA_PRIV_SENSE:
+			return blk_rq_bytes(rq);
+		default:
+			return 0;
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
+
+void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
+{
+	struct ide_taskfile tf;
+
+	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT |
+				     IDE_VALID_LBAM | IDE_VALID_LBAH);
+
+	*bcount = (tf.lbah << 8) | tf.lbam;
+	*ireason = tf.nsect & 3;
+}
+EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
+
+/*
+ * Check the contents of the interrupt reason register and attempt to recover if
+ * there are problems.
+ *
+ * Returns:
+ * - 0 if everything's ok
+ * - 1 if the request has to be terminated.
+ */
+int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len,
+		      int ireason, int rw)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	debug_log("ireason: 0x%x, rw: 0x%x\n", ireason, rw);
+
+	if (ireason == (!rw << 1))
+		return 0;
+	else if (ireason == (rw << 1)) {
+		printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
+				drive->name, __func__);
+
+		if (dev_is_idecd(drive))
+			ide_pad_transfer(drive, rw, len);
+	} else if (!rw && ireason == ATAPI_COD) {
+		if (dev_is_idecd(drive)) {
+			/*
+			 * Some drives (ASUS) seem to tell us that status info
+			 * is available.  Just get it and ignore.
+			 */
+			(void)hwif->tp_ops->read_status(hwif);
+			return 0;
+		}
+	} else {
+		if (ireason & ATAPI_COD)
+			printk(KERN_ERR PFX "%s: CoD != 0 in %s\n", drive->name,
+					__func__);
+
+		/* drive wants a command packet, or invalid ireason... */
+		printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
+				drive->name, __func__, ireason);
+	}
+
+	if (dev_is_idecd(drive) && ata_pc_request(rq))
+		rq->rq_flags |= RQF_FAILED;
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(ide_check_ireason);
+
+/*
+ * This is the usual interrupt handler which will be called during a packet
+ * command.  We will transfer some of the data (as requested by the drive)
+ * and will re-point interrupt handler to us.
+ */
+static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
+{
+	struct ide_atapi_pc *pc = drive->pc;
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
+	struct request *rq = hwif->rq;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	unsigned int timeout, done;
+	u16 bcount;
+	u8 stat, ireason, dsc = 0;
+	u8 write = !!(pc->flags & PC_FLAG_WRITING);
+
+	debug_log("Enter %s - interrupt handler\n", __func__);
+
+	timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+					       : WAIT_TAPE_CMD;
+
+	/* Clear the interrupt */
+	stat = tp_ops->read_status(hwif);
+
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+		int rc;
+
+		drive->waiting_for_dma = 0;
+		rc = hwif->dma_ops->dma_end(drive);
+		ide_dma_unmap_sg(drive, cmd);
+
+		if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) {
+			if (drive->media == ide_floppy)
+				printk(KERN_ERR PFX "%s: DMA %s error\n",
+					drive->name, rq_data_dir(pc->rq)
+						     ? "write" : "read");
+			pc->flags |= PC_FLAG_DMA_ERROR;
+		} else
+			scsi_req(rq)->resid_len = 0;
+		debug_log("%s: DMA finished\n", drive->name);
+	}
+
+	/* No more interrupts */
+	if ((stat & ATA_DRQ) == 0) {
+		int uptodate;
+		blk_status_t error;
+
+		debug_log("Packet command completed, %d bytes transferred\n",
+			  blk_rq_bytes(rq));
+
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
+
+		local_irq_enable_in_hardirq();
+
+		if (drive->media == ide_tape &&
+		    (stat & ATA_ERR) && scsi_req(rq)->cmd[0] == REQUEST_SENSE)
+			stat &= ~ATA_ERR;
+
+		if ((stat & ATA_ERR) || (pc->flags & PC_FLAG_DMA_ERROR)) {
+			/* Error detected */
+			debug_log("%s: I/O error\n", drive->name);
+
+			if (drive->media != ide_tape)
+				scsi_req(pc->rq)->result++;
+
+			if (scsi_req(rq)->cmd[0] == REQUEST_SENSE) {
+				printk(KERN_ERR PFX "%s: I/O error in request "
+						"sense command\n", drive->name);
+				return ide_do_reset(drive);
+			}
+
+			debug_log("[cmd %x]: check condition\n", scsi_req(rq)->cmd[0]);
+
+			/* Retry operation */
+			ide_retry_pc(drive);
+
+			/* queued, but not started */
+			return ide_stopped;
+		}
+		pc->error = 0;
+
+		if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0)
+			dsc = 1;
+
+		/*
+		 * ->pc_callback() might change rq->data_len for
+		 * residual count, cache total length.
+		 */
+		done = blk_rq_bytes(rq);
+
+		/* Command finished - Call the callback function */
+		uptodate = drive->pc_callback(drive, dsc);
+
+		if (uptodate == 0)
+			drive->failed_pc = NULL;
+
+		if (ata_misc_request(rq)) {
+			scsi_req(rq)->result = 0;
+			error = BLK_STS_OK;
+		} else {
+
+			if (blk_rq_is_passthrough(rq) && uptodate <= 0) {
+				if (scsi_req(rq)->result == 0)
+					scsi_req(rq)->result = -EIO;
+			}
+
+			error = uptodate ? BLK_STS_OK : BLK_STS_IOERR;
+		}
+
+		ide_complete_rq(drive, error, blk_rq_bytes(rq));
+		return ide_stopped;
+	}
+
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
+		printk(KERN_ERR PFX "%s: The device wants to issue more "
+				"interrupts in DMA mode\n", drive->name);
+		ide_dma_off(drive);
+		return ide_do_reset(drive);
+	}
+
+	/* Get the number of bytes to transfer on this interrupt. */
+	ide_read_bcount_and_ireason(drive, &bcount, &ireason);
+
+	if (ide_check_ireason(drive, rq, bcount, ireason, write))
+		return ide_do_reset(drive);
+
+	done = min_t(unsigned int, bcount, cmd->nleft);
+	ide_pio_bytes(drive, cmd, write, done);
+
+	/* Update transferred byte count */
+	scsi_req(rq)->resid_len -= done;
+
+	bcount -= done;
+
+	if (bcount)
+		ide_pad_transfer(drive, write, bcount);
+
+	debug_log("[cmd %x] transferred %d bytes, padded %d bytes, resid: %u\n",
+		  scsi_req(rq)->cmd[0], done, bcount, scsi_req(rq)->resid_len);
+
+	/* And set the interrupt handler again */
+	ide_set_handler(drive, ide_pc_intr, timeout);
+	return ide_started;
+}
+
+static void ide_init_packet_cmd(struct ide_cmd *cmd, u8 valid_tf,
+				u16 bcount, u8 dma)
+{
+	cmd->protocol = dma ? ATAPI_PROT_DMA : ATAPI_PROT_PIO;
+	cmd->valid.out.tf = IDE_VALID_LBAH | IDE_VALID_LBAM |
+			    IDE_VALID_FEATURE | valid_tf;
+	cmd->tf.command = ATA_CMD_PACKET;
+	cmd->tf.feature = dma;		/* Use PIO/DMA */
+	cmd->tf.lbam    = bcount & 0xff;
+	cmd->tf.lbah    = (bcount >> 8) & 0xff;
+}
+
+static u8 ide_read_ireason(ide_drive_t *drive)
+{
+	struct ide_taskfile tf;
+
+	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_NSECT);
+
+	return tf.nsect & 3;
+}
+
+static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
+{
+	int retries = 100;
+
+	while (retries-- && ((ireason & ATAPI_COD) == 0 ||
+		(ireason & ATAPI_IO))) {
+		printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing "
+				"a packet command, retrying\n", drive->name);
+		udelay(100);
+		ireason = ide_read_ireason(drive);
+		if (retries == 0) {
+			printk(KERN_ERR PFX "%s: (IO,CoD != (0,1) while issuing"
+					" a packet command, ignoring\n",
+					drive->name);
+			ireason |= ATAPI_COD;
+			ireason &= ~ATAPI_IO;
+		}
+	}
+
+	return ireason;
+}
+
+static int ide_delayed_transfer_pc(ide_drive_t *drive)
+{
+	/* Send the actual packet */
+	drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
+
+	/* Timeout for the packet command */
+	return WAIT_FLOPPY_CMD;
+}
+
+static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
+{
+	struct ide_atapi_pc *pc;
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq = hwif->rq;
+	ide_expiry_t *expiry;
+	unsigned int timeout;
+	int cmd_len;
+	ide_startstop_t startstop;
+	u8 ireason;
+
+	if (ide_wait_stat(&startstop, drive, ATA_DRQ, ATA_BUSY, WAIT_READY)) {
+		printk(KERN_ERR PFX "%s: Strange, packet command initiated yet "
+				"DRQ isn't asserted\n", drive->name);
+		return startstop;
+	}
+
+	if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+		if (drive->dma)
+			drive->waiting_for_dma = 1;
+	}
+
+	if (dev_is_idecd(drive)) {
+		/* ATAPI commands get padded out to 12 bytes minimum */
+		cmd_len = COMMAND_SIZE(scsi_req(rq)->cmd[0]);
+		if (cmd_len < ATAPI_MIN_CDB_BYTES)
+			cmd_len = ATAPI_MIN_CDB_BYTES;
+
+		timeout = rq->timeout;
+		expiry  = ide_cd_expiry;
+	} else {
+		pc = drive->pc;
+
+		cmd_len = ATAPI_MIN_CDB_BYTES;
+
+		/*
+		 * If necessary schedule the packet transfer to occur 'timeout'
+		 * milliseconds later in ide_delayed_transfer_pc() after the
+		 * device says it's ready for a packet.
+		 */
+		if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
+			timeout = drive->pc_delay;
+			expiry = &ide_delayed_transfer_pc;
+		} else {
+			timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+							       : WAIT_TAPE_CMD;
+			expiry = NULL;
+		}
+
+		ireason = ide_read_ireason(drive);
+		if (drive->media == ide_tape)
+			ireason = ide_wait_ireason(drive, ireason);
+
+		if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
+			printk(KERN_ERR PFX "%s: (IO,CoD) != (0,1) while "
+				"issuing a packet command\n", drive->name);
+
+			return ide_do_reset(drive);
+		}
+	}
+
+	hwif->expiry = expiry;
+
+	/* Set the interrupt routine */
+	ide_set_handler(drive,
+			(dev_is_idecd(drive) ? drive->irq_handler
+					     : ide_pc_intr),
+			timeout);
+
+	/* Send the actual packet */
+	if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
+		hwif->tp_ops->output_data(drive, NULL, scsi_req(rq)->cmd, cmd_len);
+
+	/* Begin DMA, if necessary */
+	if (dev_is_idecd(drive)) {
+		if (drive->dma)
+			hwif->dma_ops->dma_start(drive);
+	} else {
+		if (pc->flags & PC_FLAG_DMA_OK) {
+			pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
+			hwif->dma_ops->dma_start(drive);
+		}
+	}
+
+	return ide_started;
+}
+
+ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	struct ide_atapi_pc *pc;
+	ide_hwif_t *hwif = drive->hwif;
+	ide_expiry_t *expiry = NULL;
+	struct request *rq = hwif->rq;
+	unsigned int timeout, bytes;
+	u16 bcount;
+	u8 valid_tf;
+	u8 drq_int = !!(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT);
+
+	if (dev_is_idecd(drive)) {
+		valid_tf = IDE_VALID_NSECT | IDE_VALID_LBAL;
+		bcount = ide_cd_get_xferlen(rq);
+		expiry = ide_cd_expiry;
+		timeout = ATAPI_WAIT_PC;
+
+		if (drive->dma)
+			drive->dma = !ide_dma_prepare(drive, cmd);
+	} else {
+		pc = drive->pc;
+
+		valid_tf = IDE_VALID_DEVICE;
+		bytes = blk_rq_bytes(rq);
+		bcount = ((drive->media == ide_tape) ? bytes
+						     : min_t(unsigned int,
+							     bytes, 63 * 1024));
+
+		/* We haven't transferred any data yet */
+		scsi_req(rq)->resid_len = bcount;
+
+		if (pc->flags & PC_FLAG_DMA_ERROR) {
+			pc->flags &= ~PC_FLAG_DMA_ERROR;
+			ide_dma_off(drive);
+		}
+
+		if (pc->flags & PC_FLAG_DMA_OK)
+			drive->dma = !ide_dma_prepare(drive, cmd);
+
+		if (!drive->dma)
+			pc->flags &= ~PC_FLAG_DMA_OK;
+
+		timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+						       : WAIT_TAPE_CMD;
+	}
+
+	ide_init_packet_cmd(cmd, valid_tf, bcount, drive->dma);
+
+	(void)do_rw_taskfile(drive, cmd);
+
+	if (drq_int) {
+		if (drive->dma)
+			drive->waiting_for_dma = 0;
+		hwif->expiry = expiry;
+	}
+
+	ide_execute_command(drive, cmd, ide_transfer_pc, timeout);
+
+	return drq_int ? ide_started : ide_transfer_pc(drive);
+}
+EXPORT_SYMBOL_GPL(ide_issue_pc);
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
new file mode 100644
index 000000000..25d2d88e8
--- /dev/null
+++ b/drivers/ide/ide-cd.c
@@ -0,0 +1,1858 @@
+/*
+ * ATAPI CD-ROM driver.
+ *
+ * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
+ * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * See Documentation/cdrom/ide-cd.rst for usage information.
+ *
+ * Suggestions are welcome. Patches that work are more welcome though. ;-)
+ *
+ * Documentation:
+ *	Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
+ *
+ * For historical changelog please see:
+ *	Documentation/ide/ChangeLog.ide-cd.1994-2004
+ */
+
+#define DRV_NAME "ide-cd"
+#define PFX DRV_NAME ": "
+
+#define IDECD_VERSION "5.00"
+
+#include <linux/compat.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched/task_stack.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/cdrom.h>
+#include <linux/ide.h>
+#include <linux/completion.h>
+#include <linux/mutex.h>
+#include <linux/bcd.h>
+
+/* For SCSI -> ATAPI command conversion */
+#include <scsi/scsi.h>
+
+#include <linux/io.h>
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <asm/unaligned.h>
+
+#include "ide-cd.h"
+
+static DEFINE_MUTEX(ide_cd_mutex);
+static DEFINE_MUTEX(idecd_ref_mutex);
+
+static void ide_cd_release(struct device *);
+
+static struct cdrom_info *ide_cd_get(struct gendisk *disk)
+{
+	struct cdrom_info *cd = NULL;
+
+	mutex_lock(&idecd_ref_mutex);
+	cd = ide_drv_g(disk, cdrom_info);
+	if (cd) {
+		if (ide_device_get(cd->drive))
+			cd = NULL;
+		else
+			get_device(&cd->dev);
+
+	}
+	mutex_unlock(&idecd_ref_mutex);
+	return cd;
+}
+
+static void ide_cd_put(struct cdrom_info *cd)
+{
+	ide_drive_t *drive = cd->drive;
+
+	mutex_lock(&idecd_ref_mutex);
+	put_device(&cd->dev);
+	ide_device_put(drive);
+	mutex_unlock(&idecd_ref_mutex);
+}
+
+/*
+ * Generic packet command support and error handling routines.
+ */
+
+/* Mark that we've seen a media change and invalidate our internal buffers. */
+static void cdrom_saw_media_change(ide_drive_t *drive)
+{
+	drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
+	drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
+}
+
+static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
+{
+	struct request_sense *sense = &drive->sense_data;
+	int log = 0;
+
+	if (!sense || !rq || (rq->rq_flags & RQF_QUIET))
+		return 0;
+
+	ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
+
+	switch (sense->sense_key) {
+	case NO_SENSE:
+	case RECOVERED_ERROR:
+		break;
+	case NOT_READY:
+		/*
+		 * don't care about tray state messages for e.g. capacity
+		 * commands or in-progress or becoming ready
+		 */
+		if (sense->asc == 0x3a || sense->asc == 0x04)
+			break;
+		log = 1;
+		break;
+	case ILLEGAL_REQUEST:
+		/*
+		 * don't log START_STOP unit with LoEj set, since we cannot
+		 * reliably check if drive can auto-close
+		 */
+		if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
+			break;
+		log = 1;
+		break;
+	case UNIT_ATTENTION:
+		/*
+		 * Make good and sure we've seen this potential media change.
+		 * Some drives (i.e. Creative) fail to present the correct sense
+		 * key in the error register.
+		 */
+		cdrom_saw_media_change(drive);
+		break;
+	default:
+		log = 1;
+		break;
+	}
+	return log;
+}
+
+static void cdrom_analyze_sense_data(ide_drive_t *drive,
+				     struct request *failed_command)
+{
+	struct request_sense *sense = &drive->sense_data;
+	struct cdrom_info *info = drive->driver_data;
+	unsigned long sector;
+	unsigned long bio_sectors;
+
+	ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
+				     sense->error_code, sense->sense_key);
+
+	if (failed_command)
+		ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
+					     failed_command->cmd[0]);
+
+	if (!cdrom_log_sense(drive, failed_command))
+		return;
+
+	/*
+	 * If a read toc is executed for a CD-R or CD-RW medium where the first
+	 * toc has not been recorded yet, it will fail with 05/24/00 (which is a
+	 * confusing error)
+	 */
+	if (failed_command && scsi_req(failed_command)->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
+		if (sense->sense_key == 0x05 && sense->asc == 0x24)
+			return;
+
+	/* current error */
+	if (sense->error_code == 0x70) {
+		switch (sense->sense_key) {
+		case MEDIUM_ERROR:
+		case VOLUME_OVERFLOW:
+		case ILLEGAL_REQUEST:
+			if (!sense->valid)
+				break;
+			if (failed_command == NULL ||
+			    blk_rq_is_passthrough(failed_command))
+				break;
+			sector = (sense->information[0] << 24) |
+				 (sense->information[1] << 16) |
+				 (sense->information[2] <<  8) |
+				 (sense->information[3]);
+
+			if (queue_logical_block_size(drive->queue) == 2048)
+				/* device sector size is 2K */
+				sector <<= 2;
+
+			bio_sectors = max(bio_sectors(failed_command->bio), 4U);
+			sector &= ~(bio_sectors - 1);
+
+			/*
+			 * The SCSI specification allows for the value
+			 * returned by READ CAPACITY to be up to 75 2K
+			 * sectors past the last readable block.
+			 * Therefore, if we hit a medium error within the
+			 * last 75 2K sectors, we decrease the saved size
+			 * value.
+			 */
+			if (sector < get_capacity(info->disk) &&
+			    drive->probed_capacity - sector < 4 * 75)
+				set_capacity(info->disk, sector);
+		}
+	}
+
+	ide_cd_log_error(drive->name, failed_command, sense);
+}
+
+static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
+{
+	/*
+	 * For ATA_PRIV_SENSE, "ide_req(rq)->special" points to the original
+	 * failed request.  Also, the sense data should be read
+	 * directly from rq which might be different from the original
+	 * sense buffer if it got copied during mapping.
+	 */
+	struct request *failed = ide_req(rq)->special;
+	void *sense = bio_data(rq->bio);
+
+	if (failed) {
+		/*
+		 * Sense is always read into drive->sense_data, copy back to the
+		 * original request.
+		 */
+		memcpy(scsi_req(failed)->sense, sense, 18);
+		scsi_req(failed)->sense_len = scsi_req(rq)->sense_len;
+		cdrom_analyze_sense_data(drive, failed);
+
+		if (ide_end_rq(drive, failed, BLK_STS_IOERR, blk_rq_bytes(failed)))
+			BUG();
+	} else
+		cdrom_analyze_sense_data(drive, NULL);
+}
+
+
+/*
+ * Allow the drive 5 seconds to recover; some devices will return NOT_READY
+ * while flushing data from cache.
+ *
+ * returns: 0 failed (write timeout expired)
+ *	    1 success
+ */
+static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
+{
+
+	struct cdrom_info *info = drive->driver_data;
+
+	if (!scsi_req(rq)->result)
+		info->write_timeout = jiffies +	ATAPI_WAIT_WRITE_BUSY;
+
+	scsi_req(rq)->result = 1;
+
+	if (time_after(jiffies, info->write_timeout))
+		return 0;
+	else {
+		/*
+		 * take a breather
+		 */
+		blk_mq_requeue_request(rq, false);
+		blk_mq_delay_kick_requeue_list(drive->queue, 1);
+		return 1;
+	}
+}
+
+static void ide_cd_free_sense(ide_drive_t *drive)
+{
+	if (!drive->sense_rq)
+		return;
+
+	blk_mq_free_request(drive->sense_rq);
+	drive->sense_rq = NULL;
+	drive->sense_rq_armed = false;
+}
+
+/**
+ * Returns:
+ * 0: if the request should be continued.
+ * 1: if the request will be going through error recovery.
+ * 2: if the request should be ended.
+ */
+static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq = hwif->rq;
+	int err, sense_key, do_end_request = 0;
+
+	/* get the IDE error register */
+	err = ide_read_error(drive);
+	sense_key = err >> 4;
+
+	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
+				  "stat 0x%x",
+				  rq->cmd[0], rq->cmd_type, err, stat);
+
+	if (ata_sense_request(rq)) {
+		/*
+		 * We got an error trying to get sense info from the drive
+		 * (probably while trying to recover from a former error).
+		 * Just give up.
+		 */
+		rq->rq_flags |= RQF_FAILED;
+		return 2;
+	}
+
+	/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
+	if (blk_rq_is_scsi(rq) && !scsi_req(rq)->result)
+		scsi_req(rq)->result = SAM_STAT_CHECK_CONDITION;
+
+	if (blk_noretry_request(rq))
+		do_end_request = 1;
+
+	switch (sense_key) {
+	case NOT_READY:
+		if (req_op(rq) == REQ_OP_WRITE) {
+			if (ide_cd_breathe(drive, rq))
+				return 1;
+		} else {
+			cdrom_saw_media_change(drive);
+
+			if (!blk_rq_is_passthrough(rq) &&
+			    !(rq->rq_flags & RQF_QUIET))
+				printk(KERN_ERR PFX "%s: tray open\n",
+					drive->name);
+		}
+		do_end_request = 1;
+		break;
+	case UNIT_ATTENTION:
+		cdrom_saw_media_change(drive);
+
+		if (blk_rq_is_passthrough(rq))
+			return 0;
+
+		/*
+		 * Arrange to retry the request but be sure to give up if we've
+		 * retried too many times.
+		 */
+		if (++scsi_req(rq)->result > ERROR_MAX)
+			do_end_request = 1;
+		break;
+	case ILLEGAL_REQUEST:
+		/*
+		 * Don't print error message for this condition -- SFF8090i
+		 * indicates that 5/24/00 is the correct response to a request
+		 * to close the tray if the drive doesn't have that capability.
+		 *
+		 * cdrom_log_sense() knows this!
+		 */
+		if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
+			break;
+		fallthrough;
+	case DATA_PROTECT:
+		/*
+		 * No point in retrying after an illegal request or data
+		 * protect error.
+		 */
+		if (!(rq->rq_flags & RQF_QUIET))
+			ide_dump_status(drive, "command error", stat);
+		do_end_request = 1;
+		break;
+	case MEDIUM_ERROR:
+		/*
+		 * No point in re-trying a zillion times on a bad sector.
+		 * If we got here the error is not correctable.
+		 */
+		if (!(rq->rq_flags & RQF_QUIET))
+			ide_dump_status(drive, "media error "
+					"(bad sector)", stat);
+		do_end_request = 1;
+		break;
+	case BLANK_CHECK:
+		/* disk appears blank? */
+		if (!(rq->rq_flags & RQF_QUIET))
+			ide_dump_status(drive, "media error (blank)",
+					stat);
+		do_end_request = 1;
+		break;
+	default:
+		if (blk_rq_is_passthrough(rq))
+			break;
+		if (err & ~ATA_ABORTED) {
+			/* go to the default handler for other errors */
+			ide_error(drive, "cdrom_decode_status", stat);
+			return 1;
+		} else if (++scsi_req(rq)->result > ERROR_MAX)
+			/* we've racked up too many retries, abort */
+			do_end_request = 1;
+	}
+
+	if (blk_rq_is_passthrough(rq)) {
+		rq->rq_flags |= RQF_FAILED;
+		do_end_request = 1;
+	}
+
+	/*
+	 * End a request through request sense analysis when we have sense data.
+	 * We need this in order to perform end of media processing.
+	 */
+	if (do_end_request)
+		goto end_request;
+
+	/* if we got a CHECK_CONDITION status, queue a request sense command */
+	if (stat & ATA_ERR)
+		return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
+	return 1;
+
+end_request:
+	if (stat & ATA_ERR) {
+		hwif->rq = NULL;
+		return ide_queue_sense_rq(drive, rq) ? 2 : 1;
+	} else
+		return 2;
+}
+
+static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	struct request *rq = cmd->rq;
+
+	ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
+
+	/*
+	 * Some of the trailing request sense fields are optional,
+	 * and some drives don't send them.  Sigh.
+	 */
+	if (scsi_req(rq)->cmd[0] == GPCMD_REQUEST_SENSE &&
+	    cmd->nleft > 0 && cmd->nleft <= 5)
+		cmd->nleft = 0;
+}
+
+int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
+		    int write, void *buffer, unsigned *bufflen,
+		    struct scsi_sense_hdr *sshdr, int timeout,
+		    req_flags_t rq_flags)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct scsi_sense_hdr local_sshdr;
+	int retries = 10;
+	bool failed;
+
+	ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
+				  "rq_flags: 0x%x",
+				  cmd[0], write, timeout, rq_flags);
+
+	if (!sshdr)
+		sshdr = &local_sshdr;
+
+	/* start of retry loop */
+	do {
+		struct request *rq;
+		int error;
+		bool delay = false;
+
+		rq = blk_get_request(drive->queue,
+			write ? REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+		memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
+		ide_req(rq)->type = ATA_PRIV_PC;
+		rq->rq_flags |= rq_flags;
+		rq->timeout = timeout;
+		if (buffer) {
+			error = blk_rq_map_kern(drive->queue, rq, buffer,
+						*bufflen, GFP_NOIO);
+			if (error) {
+				blk_put_request(rq);
+				return error;
+			}
+		}
+
+		blk_execute_rq(drive->queue, info->disk, rq, 0);
+		error = scsi_req(rq)->result ? -EIO : 0;
+
+		if (buffer)
+			*bufflen = scsi_req(rq)->resid_len;
+		scsi_normalize_sense(scsi_req(rq)->sense,
+				     scsi_req(rq)->sense_len, sshdr);
+
+		/*
+		 * FIXME: we should probably abort/retry or something in case of
+		 * failure.
+		 */
+		failed = (rq->rq_flags & RQF_FAILED) != 0;
+		if (failed) {
+			/*
+			 * The request failed.  Retry if it was due to a unit
+			 * attention status (usually means media was changed).
+			 */
+			if (sshdr->sense_key == UNIT_ATTENTION)
+				cdrom_saw_media_change(drive);
+			else if (sshdr->sense_key == NOT_READY &&
+				 sshdr->asc == 4 && sshdr->ascq != 4) {
+				/*
+				 * The drive is in the process of loading
+				 * a disk.  Retry, but wait a little to give
+				 * the drive time to complete the load.
+				 */
+				delay = true;
+			} else {
+				/* otherwise, don't retry */
+				retries = 0;
+			}
+			--retries;
+		}
+		blk_put_request(rq);
+		if (delay)
+			ssleep(2);
+	} while (failed && retries >= 0);
+
+	/* return an error if the command failed */
+	return failed ? -EIO : 0;
+}
+
+/*
+ * returns true if rq has been completed
+ */
+static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
+
+	if (cmd->tf_flags & IDE_TFLAG_WRITE)
+		nr_bytes -= cmd->last_xfer_len;
+
+	if (nr_bytes > 0) {
+		ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
+		return true;
+	}
+
+	return false;
+}
+
+/* standard prep_rq that builds 10 byte cmds */
+static bool ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
+{
+	int hard_sect = queue_logical_block_size(q);
+	long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
+	unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
+	struct scsi_request *req = scsi_req(rq);
+
+	if (rq_data_dir(rq) == READ)
+		req->cmd[0] = GPCMD_READ_10;
+	else
+		req->cmd[0] = GPCMD_WRITE_10;
+
+	/*
+	 * fill in lba
+	 */
+	req->cmd[2] = (block >> 24) & 0xff;
+	req->cmd[3] = (block >> 16) & 0xff;
+	req->cmd[4] = (block >>  8) & 0xff;
+	req->cmd[5] = block & 0xff;
+
+	/*
+	 * and transfer length
+	 */
+	req->cmd[7] = (blocks >> 8) & 0xff;
+	req->cmd[8] = blocks & 0xff;
+	req->cmd_len = 10;
+	return true;
+}
+
+/*
+ * Most of the SCSI commands are supported directly by ATAPI devices.
+ * This transform handles the few exceptions.
+ */
+static bool ide_cdrom_prep_pc(struct request *rq)
+{
+	u8 *c = scsi_req(rq)->cmd;
+
+	/* transform 6-byte read/write commands to the 10-byte version */
+	if (c[0] == READ_6 || c[0] == WRITE_6) {
+		c[8] = c[4];
+		c[5] = c[3];
+		c[4] = c[2];
+		c[3] = c[1] & 0x1f;
+		c[2] = 0;
+		c[1] &= 0xe0;
+		c[0] += (READ_10 - READ_6);
+		scsi_req(rq)->cmd_len = 10;
+		return true;
+	}
+
+	/*
+	 * it's silly to pretend we understand 6-byte sense commands, just
+	 * reject with ILLEGAL_REQUEST and the caller should take the
+	 * appropriate action
+	 */
+	if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
+		scsi_req(rq)->result = ILLEGAL_REQUEST;
+		return false;
+	}
+
+	return true;
+}
+
+static bool ide_cdrom_prep_rq(ide_drive_t *drive, struct request *rq)
+{
+	if (!blk_rq_is_passthrough(rq)) {
+		scsi_req_init(scsi_req(rq));
+
+		return ide_cdrom_prep_fs(drive->queue, rq);
+	} else if (blk_rq_is_scsi(rq))
+		return ide_cdrom_prep_pc(rq);
+
+	return true;
+}
+
+static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
+	struct request *rq = hwif->rq;
+	ide_expiry_t *expiry = NULL;
+	int dma_error = 0, dma, thislen, uptodate = 0;
+	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
+	int sense = ata_sense_request(rq);
+	unsigned int timeout;
+	u16 len;
+	u8 ireason, stat;
+
+	ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
+
+	/* check for errors */
+	dma = drive->dma;
+	if (dma) {
+		drive->dma = 0;
+		drive->waiting_for_dma = 0;
+		dma_error = hwif->dma_ops->dma_end(drive);
+		ide_dma_unmap_sg(drive, cmd);
+		if (dma_error) {
+			printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
+					write ? "write" : "read");
+			ide_dma_off(drive);
+		}
+	}
+
+	/* check status */
+	stat = hwif->tp_ops->read_status(hwif);
+
+	if (!OK_STAT(stat, 0, BAD_R_STAT)) {
+		rc = cdrom_decode_status(drive, stat);
+		if (rc) {
+			if (rc == 2)
+				goto out_end;
+			return ide_stopped;
+		}
+	}
+
+	/* using dma, transfer is complete now */
+	if (dma) {
+		if (dma_error)
+			return ide_error(drive, "dma error", stat);
+		uptodate = 1;
+		goto out_end;
+	}
+
+	ide_read_bcount_and_ireason(drive, &len, &ireason);
+
+	thislen = !blk_rq_is_passthrough(rq) ? len : cmd->nleft;
+	if (thislen > len)
+		thislen = len;
+
+	ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
+				  stat, thislen);
+
+	/* If DRQ is clear, the command has completed. */
+	if ((stat & ATA_DRQ) == 0) {
+		switch (req_op(rq)) {
+		default:
+			/*
+			 * If we're not done reading/writing, complain.
+			 * Otherwise, complete the command normally.
+			 */
+			uptodate = 1;
+			if (cmd->nleft > 0) {
+				printk(KERN_ERR PFX "%s: %s: data underrun "
+					"(%u bytes)\n", drive->name, __func__,
+					cmd->nleft);
+				if (!write)
+					rq->rq_flags |= RQF_FAILED;
+				uptodate = 0;
+			}
+			goto out_end;
+		case REQ_OP_DRV_IN:
+		case REQ_OP_DRV_OUT:
+			ide_cd_request_sense_fixup(drive, cmd);
+
+			uptodate = cmd->nleft ? 0 : 1;
+
+			/*
+			 * suck out the remaining bytes from the drive in an
+			 * attempt to complete the data xfer. (see BZ#13399)
+			 */
+			if (!(stat & ATA_ERR) && !uptodate && thislen) {
+				ide_pio_bytes(drive, cmd, write, thislen);
+				uptodate = cmd->nleft ? 0 : 1;
+			}
+
+			if (!uptodate)
+				rq->rq_flags |= RQF_FAILED;
+			goto out_end;
+		case REQ_OP_SCSI_IN:
+		case REQ_OP_SCSI_OUT:
+			goto out_end;
+		}
+	}
+
+	rc = ide_check_ireason(drive, rq, len, ireason, write);
+	if (rc)
+		goto out_end;
+
+	cmd->last_xfer_len = 0;
+
+	ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
+				  "ireason: 0x%x",
+				  rq->cmd_type, ireason);
+
+	/* transfer data */
+	while (thislen > 0) {
+		int blen = min_t(int, thislen, cmd->nleft);
+
+		if (cmd->nleft == 0)
+			break;
+
+		ide_pio_bytes(drive, cmd, write, blen);
+		cmd->last_xfer_len += blen;
+
+		thislen -= blen;
+		len -= blen;
+
+		if (sense && write == 0)
+			scsi_req(rq)->sense_len += blen;
+	}
+
+	/* pad, if necessary */
+	if (len > 0) {
+		if (blk_rq_is_passthrough(rq) || write == 0)
+			ide_pad_transfer(drive, write, len);
+		else {
+			printk(KERN_ERR PFX "%s: confused, missing data\n",
+				drive->name);
+			blk_dump_rq_flags(rq, "cdrom_newpc_intr");
+		}
+	}
+
+	switch (req_op(rq)) {
+	case REQ_OP_SCSI_IN:
+	case REQ_OP_SCSI_OUT:
+		timeout = rq->timeout;
+		break;
+	case REQ_OP_DRV_IN:
+	case REQ_OP_DRV_OUT:
+		expiry = ide_cd_expiry;
+		fallthrough;
+	default:
+		timeout = ATAPI_WAIT_PC;
+		break;
+	}
+
+	hwif->expiry = expiry;
+	ide_set_handler(drive, cdrom_newpc_intr, timeout);
+	return ide_started;
+
+out_end:
+	if (blk_rq_is_scsi(rq) && rc == 0) {
+		scsi_req(rq)->resid_len = 0;
+		blk_mq_end_request(rq, BLK_STS_OK);
+		hwif->rq = NULL;
+	} else {
+		if (sense && uptodate)
+			ide_cd_complete_failed_rq(drive, rq);
+
+		if (!blk_rq_is_passthrough(rq)) {
+			if (cmd->nleft == 0)
+				uptodate = 1;
+		} else {
+			if (uptodate <= 0 && scsi_req(rq)->result == 0)
+				scsi_req(rq)->result = -EIO;
+		}
+
+		if (uptodate == 0 && rq->bio)
+			if (ide_cd_error_cmd(drive, cmd))
+				return ide_stopped;
+
+		/* make sure it's fully ended */
+		if (blk_rq_is_passthrough(rq)) {
+			scsi_req(rq)->resid_len -= cmd->nbytes - cmd->nleft;
+			if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
+				scsi_req(rq)->resid_len += cmd->last_xfer_len;
+		}
+
+		ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, blk_rq_bytes(rq));
+
+		if (sense && rc == 2)
+			ide_error(drive, "request sense failure", stat);
+	}
+
+	ide_cd_free_sense(drive);
+	return ide_stopped;
+}
+
+static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct request_queue *q = drive->queue;
+	int write = rq_data_dir(rq) == WRITE;
+	unsigned short sectors_per_frame =
+		queue_logical_block_size(q) >> SECTOR_SHIFT;
+
+	ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
+				  "secs_per_frame: %u",
+				  rq->cmd[0], rq->cmd_flags, sectors_per_frame);
+
+	if (write) {
+		/* disk has become write protected */
+		if (get_disk_ro(cd->disk))
+			return ide_stopped;
+	} else {
+		/*
+		 * We may be retrying this request after an error.  Fix up any
+		 * weirdness which might be present in the request packet.
+		 */
+		ide_cdrom_prep_rq(drive, rq);
+	}
+
+	/* fs requests *must* be hardware frame aligned */
+	if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
+	    (blk_rq_pos(rq) & (sectors_per_frame - 1)))
+		return ide_stopped;
+
+	/* use DMA, if possible */
+	drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+	if (write)
+		cd->devinfo.media_written = 1;
+
+	rq->timeout = ATAPI_WAIT_PC;
+
+	return ide_started;
+}
+
+static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
+{
+
+	ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
+				  rq->cmd[0], rq->cmd_type);
+
+	if (blk_rq_is_scsi(rq))
+		rq->rq_flags |= RQF_QUIET;
+	else
+		rq->rq_flags &= ~RQF_FAILED;
+
+	drive->dma = 0;
+
+	/* sg request */
+	if (rq->bio) {
+		struct request_queue *q = drive->queue;
+		char *buf = bio_data(rq->bio);
+		unsigned int alignment;
+
+		drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+		/*
+		 * check if dma is safe
+		 *
+		 * NOTE! The "len" and "addr" checks should possibly have
+		 * separate masks.
+		 */
+		alignment = queue_dma_alignment(q) | q->dma_pad_mask;
+		if ((unsigned long)buf & alignment
+		    || blk_rq_bytes(rq) & q->dma_pad_mask
+		    || object_is_on_stack(buf))
+			drive->dma = 0;
+	}
+}
+
+static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
+					sector_t block)
+{
+	struct ide_cmd cmd;
+	int uptodate = 0;
+	unsigned int nsectors;
+
+	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
+				  rq->cmd[0], (unsigned long long)block);
+
+	if (drive->debug_mask & IDE_DBG_RQ)
+		blk_dump_rq_flags(rq, "ide_cd_do_request");
+
+	switch (req_op(rq)) {
+	default:
+		if (cdrom_start_rw(drive, rq) == ide_stopped)
+			goto out_end;
+		break;
+	case REQ_OP_SCSI_IN:
+	case REQ_OP_SCSI_OUT:
+	handle_pc:
+		if (!rq->timeout)
+			rq->timeout = ATAPI_WAIT_PC;
+		cdrom_do_block_pc(drive, rq);
+		break;
+	case REQ_OP_DRV_IN:
+	case REQ_OP_DRV_OUT:
+		switch (ide_req(rq)->type) {
+		case ATA_PRIV_MISC:
+			/* right now this can only be a reset... */
+			uptodate = 1;
+			goto out_end;
+		case ATA_PRIV_SENSE:
+		case ATA_PRIV_PC:
+			goto handle_pc;
+		default:
+			BUG();
+		}
+	}
+
+	/* prepare sense request for this command */
+	ide_prep_sense(drive, rq);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	if (rq_data_dir(rq))
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+	cmd.rq = rq;
+
+	if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
+		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
+		ide_map_sg(drive, &cmd);
+	}
+
+	return ide_issue_pc(drive, &cmd);
+out_end:
+	nsectors = blk_rq_sectors(rq);
+
+	if (nsectors == 0)
+		nsectors = 1;
+
+	ide_complete_rq(drive, uptodate ? BLK_STS_OK : BLK_STS_IOERR, nsectors << 9);
+
+	return ide_stopped;
+}
+
+/*
+ * Ioctl handling.
+ *
+ * Routines which queue packet commands take as a final argument a pointer to a
+ * request_sense struct. If execution of the command results in an error with a
+ * CHECK CONDITION status, this structure will be filled with the results of the
+ * subsequent request sense command. The pointer can also be NULL, in which case
+ * no sense information is returned.
+ */
+static void msf_from_bcd(struct atapi_msf *msf)
+{
+	msf->minute = bcd2bin(msf->minute);
+	msf->second = bcd2bin(msf->second);
+	msf->frame  = bcd2bin(msf->frame);
+}
+
+int cdrom_check_status(ide_drive_t *drive, struct scsi_sense_hdr *sshdr)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct cdrom_device_info *cdi;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (!info)
+		return -EIO;
+
+	cdi = &info->devinfo;
+
+	memset(cmd, 0, BLK_MAX_CDB);
+	cmd[0] = GPCMD_TEST_UNIT_READY;
+
+	/*
+	 * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
+	 * instead of supporting the LOAD_UNLOAD opcode.
+	 */
+	cmd[7] = cdi->sanyo_slot % 3;
+
+	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sshdr, 0, RQF_QUIET);
+}
+
+static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
+			       unsigned long *sectors_per_frame)
+{
+	struct {
+		__be32 lba;
+		__be32 blocklen;
+	} capbuf;
+
+	int stat;
+	unsigned char cmd[BLK_MAX_CDB];
+	unsigned len = sizeof(capbuf);
+	u32 blocklen;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	memset(cmd, 0, BLK_MAX_CDB);
+	cmd[0] = GPCMD_READ_CDVD_CAPACITY;
+
+	stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, NULL, 0,
+			       RQF_QUIET);
+	if (stat)
+		return stat;
+
+	/*
+	 * Sanity check the given block size, in so far as making
+	 * sure the sectors_per_frame we give to the caller won't
+	 * end up being bogus.
+	 */
+	blocklen = be32_to_cpu(capbuf.blocklen);
+	blocklen = (blocklen >> SECTOR_SHIFT) << SECTOR_SHIFT;
+	switch (blocklen) {
+	case 512:
+	case 1024:
+	case 2048:
+	case 4096:
+		break;
+	default:
+		printk_once(KERN_ERR PFX "%s: weird block size %u; "
+				"setting default block size to 2048\n",
+				drive->name, blocklen);
+		blocklen = 2048;
+		break;
+	}
+
+	*capacity = 1 + be32_to_cpu(capbuf.lba);
+	*sectors_per_frame = blocklen >> SECTOR_SHIFT;
+
+	ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
+				     *capacity, *sectors_per_frame);
+
+	return 0;
+}
+
+static int ide_cdrom_read_tocentry(ide_drive_t *drive, int trackno,
+		int msf_flag, int format, char *buf, int buflen)
+{
+	unsigned char cmd[BLK_MAX_CDB];
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+	cmd[6] = trackno;
+	cmd[7] = (buflen >> 8);
+	cmd[8] = (buflen & 0xff);
+	cmd[9] = (format << 6);
+
+	if (msf_flag)
+		cmd[1] = 2;
+
+	return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, NULL, 0, RQF_QUIET);
+}
+
+/* Try to read the entire TOC for the disk into our internal buffer. */
+int ide_cd_read_toc(ide_drive_t *drive)
+{
+	int stat, ntracks, i;
+	struct cdrom_info *info = drive->driver_data;
+	struct cdrom_device_info *cdi = &info->devinfo;
+	struct atapi_toc *toc = info->toc;
+	struct {
+		struct atapi_toc_header hdr;
+		struct atapi_toc_entry  ent;
+	} ms_tmp;
+	long last_written;
+	unsigned long sectors_per_frame = SECTORS_PER_FRAME;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (toc == NULL) {
+		/* try to allocate space */
+		toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
+		if (toc == NULL) {
+			printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
+					drive->name);
+			return -ENOMEM;
+		}
+		info->toc = toc;
+	}
+
+	/*
+	 * Check to see if the existing data is still valid. If it is,
+	 * just return.
+	 */
+	(void) cdrom_check_status(drive, NULL);
+
+	if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
+		return 0;
+
+	/* try to get the total cdrom capacity and sector size */
+	stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame);
+	if (stat)
+		toc->capacity = 0x1fffff;
+
+	set_capacity(info->disk, toc->capacity * sectors_per_frame);
+	/* save a private copy of the TOC capacity for error handling */
+	drive->probed_capacity = toc->capacity * sectors_per_frame;
+
+	blk_queue_logical_block_size(drive->queue,
+				     sectors_per_frame << SECTOR_SHIFT);
+
+	/* first read just the header, so we know how long the TOC is */
+	stat = ide_cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
+				    sizeof(struct atapi_toc_header));
+	if (stat)
+		return stat;
+
+	if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+		toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+		toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
+	}
+
+	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+	if (ntracks <= 0)
+		return -EIO;
+	if (ntracks > MAX_TRACKS)
+		ntracks = MAX_TRACKS;
+
+	/* now read the whole schmeer */
+	stat = ide_cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
+				  (char *)&toc->hdr,
+				   sizeof(struct atapi_toc_header) +
+				   (ntracks + 1) *
+				   sizeof(struct atapi_toc_entry));
+
+	if (stat && toc->hdr.first_track > 1) {
+		/*
+		 * Cds with CDI tracks only don't have any TOC entries, despite
+		 * of this the returned values are
+		 * first_track == last_track = number of CDI tracks + 1,
+		 * so that this case is indistinguishable from the same layout
+		 * plus an additional audio track. If we get an error for the
+		 * regular case, we assume a CDI without additional audio
+		 * tracks. In this case the readable TOC is empty (CDI tracks
+		 * are not included) and only holds the Leadout entry.
+		 *
+		 * Heiko Eißfeldt.
+		 */
+		ntracks = 0;
+		stat = ide_cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
+					   (char *)&toc->hdr,
+					   sizeof(struct atapi_toc_header) +
+					   (ntracks + 1) *
+					   sizeof(struct atapi_toc_entry));
+		if (stat)
+			return stat;
+
+		if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+			toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
+			toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
+		} else {
+			toc->hdr.first_track = CDROM_LEADOUT;
+			toc->hdr.last_track = CDROM_LEADOUT;
+		}
+	}
+
+	if (stat)
+		return stat;
+
+	toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
+
+	if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
+		toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+		toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
+	}
+
+	for (i = 0; i <= ntracks; i++) {
+		if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
+			if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
+				toc->ent[i].track = bcd2bin(toc->ent[i].track);
+			msf_from_bcd(&toc->ent[i].addr.msf);
+		}
+		toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
+						  toc->ent[i].addr.msf.second,
+						  toc->ent[i].addr.msf.frame);
+	}
+
+	if (toc->hdr.first_track != CDROM_LEADOUT) {
+		/* read the multisession information */
+		stat = ide_cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
+					   sizeof(ms_tmp));
+		if (stat)
+			return stat;
+
+		toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
+	} else {
+		ms_tmp.hdr.last_track = CDROM_LEADOUT;
+		ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
+		toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
+	}
+
+	if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
+		/* re-read multisession information using MSF format */
+		stat = ide_cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
+					   sizeof(ms_tmp));
+		if (stat)
+			return stat;
+
+		msf_from_bcd(&ms_tmp.ent.addr.msf);
+		toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
+						   ms_tmp.ent.addr.msf.second,
+						   ms_tmp.ent.addr.msf.frame);
+	}
+
+	toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
+
+	/* now try to get the total cdrom capacity */
+	stat = cdrom_get_last_written(cdi, &last_written);
+	if (!stat && (last_written > toc->capacity)) {
+		toc->capacity = last_written;
+		set_capacity(info->disk, toc->capacity * sectors_per_frame);
+		drive->probed_capacity = toc->capacity * sectors_per_frame;
+	}
+
+	/* Remember that we've read this stuff. */
+	drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
+
+	return 0;
+}
+
+int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct cdrom_device_info *cdi = &info->devinfo;
+	struct packet_command cgc;
+	int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
+		size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
+
+	init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
+	do {
+		/* we seem to get stat=0x01,err=0x00 the first time (??) */
+		stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
+		if (!stat)
+			break;
+	} while (--attempts);
+	return stat;
+}
+
+void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	u16 curspeed, maxspeed;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
+		curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
+		maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
+	} else {
+		curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
+		maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
+	}
+
+	ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
+				     curspeed, maxspeed);
+
+	cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
+	cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
+}
+
+#define IDE_CD_CAPABILITIES \
+	(CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
+	 CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
+	 CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
+	 CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
+	 CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
+
+static const struct cdrom_device_ops ide_cdrom_dops = {
+	.open			= ide_cdrom_open_real,
+	.release		= ide_cdrom_release_real,
+	.drive_status		= ide_cdrom_drive_status,
+	.check_events		= ide_cdrom_check_events_real,
+	.tray_move		= ide_cdrom_tray_move,
+	.lock_door		= ide_cdrom_lock_door,
+	.select_speed		= ide_cdrom_select_speed,
+	.get_last_session	= ide_cdrom_get_last_session,
+	.get_mcn		= ide_cdrom_get_mcn,
+	.reset			= ide_cdrom_reset,
+	.audio_ioctl		= ide_cdrom_audio_ioctl,
+	.capability		= IDE_CD_CAPABILITIES,
+	.generic_packet		= ide_cdrom_packet,
+};
+
+static int ide_cdrom_register(ide_drive_t *drive, int nslots)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct cdrom_device_info *devinfo = &info->devinfo;
+
+	ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
+
+	devinfo->ops = &ide_cdrom_dops;
+	devinfo->speed = info->current_speed;
+	devinfo->capacity = nslots;
+	devinfo->handle = drive;
+	strcpy(devinfo->name, drive->name);
+
+	if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
+		devinfo->mask |= CDC_SELECT_SPEED;
+
+	return register_cdrom(info->disk, devinfo);
+}
+
+static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_device_info *cdi = &cd->devinfo;
+	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
+	mechtype_t mechtype;
+	int nslots = 1;
+
+	ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
+				     drive->media, drive->atapi_flags);
+
+	cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
+		     CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
+		     CDC_MO_DRIVE | CDC_RAM);
+
+	if (drive->media == ide_optical) {
+		cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
+		printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
+				drive->name);
+		return nslots;
+	}
+
+	if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
+		drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
+		cdi->mask &= ~CDC_PLAY_AUDIO;
+		return nslots;
+	}
+
+	/*
+	 * We have to cheat a little here. the packet will eventually be queued
+	 * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
+	 * Since this device hasn't been registered with the Uniform layer yet,
+	 * it can't do this. Same goes for cdi->ops.
+	 */
+	cdi->handle = drive;
+	cdi->ops = &ide_cdrom_dops;
+
+	if (ide_cdrom_get_capabilities(drive, buf))
+		return 0;
+
+	if ((buf[8 + 6] & 0x01) == 0)
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+	if (buf[8 + 6] & 0x08)
+		drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
+	if (buf[8 + 3] & 0x01)
+		cdi->mask &= ~CDC_CD_R;
+	if (buf[8 + 3] & 0x02)
+		cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
+	if (buf[8 + 2] & 0x38)
+		cdi->mask &= ~CDC_DVD;
+	if (buf[8 + 3] & 0x20)
+		cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
+	if (buf[8 + 3] & 0x10)
+		cdi->mask &= ~CDC_DVD_R;
+	if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
+		cdi->mask &= ~CDC_PLAY_AUDIO;
+
+	mechtype = buf[8 + 6] >> 5;
+	if (mechtype == mechtype_caddy ||
+	    mechtype == mechtype_popup ||
+	    (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
+		cdi->mask |= CDC_CLOSE_TRAY;
+
+	if (cdi->sanyo_slot > 0) {
+		cdi->mask &= ~CDC_SELECT_DISC;
+		nslots = 3;
+	} else if (mechtype == mechtype_individual_changer ||
+		   mechtype == mechtype_cartridge_changer) {
+		nslots = cdrom_number_of_slots(cdi);
+		if (nslots > 1)
+			cdi->mask &= ~CDC_SELECT_DISC;
+	}
+
+	ide_cdrom_update_speed(drive, buf);
+
+	printk(KERN_INFO PFX "%s: ATAPI", drive->name);
+
+	/* don't print speed if the drive reported 0 */
+	if (cd->max_speed)
+		printk(KERN_CONT " %dX", cd->max_speed);
+
+	printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
+
+	if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
+		printk(KERN_CONT " DVD%s%s",
+				 (cdi->mask & CDC_DVD_R) ? "" : "-R",
+				 (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
+
+	if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
+		printk(KERN_CONT " CD%s%s",
+				 (cdi->mask & CDC_CD_R) ? "" : "-R",
+				 (cdi->mask & CDC_CD_RW) ? "" : "/RW");
+
+	if ((cdi->mask & CDC_SELECT_DISC) == 0)
+		printk(KERN_CONT " changer w/%d slots", nslots);
+	else
+		printk(KERN_CONT " drive");
+
+	printk(KERN_CONT ", %dkB Cache\n",
+			 be16_to_cpup((__be16 *)&buf[8 + 12]));
+
+	return nslots;
+}
+
+struct cd_list_entry {
+	const char	*id_model;
+	const char	*id_firmware;
+	unsigned int	cd_flags;
+};
+
+#ifdef CONFIG_IDE_PROC_FS
+static sector_t ide_cdrom_capacity(ide_drive_t *drive)
+{
+	unsigned long capacity, sectors_per_frame;
+
+	if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame))
+		return 0;
+
+	return capacity * sectors_per_frame;
+}
+
+static int idecd_capacity_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t *drive = m->private;
+
+	seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
+	return 0;
+}
+
+static ide_proc_entry_t idecd_proc[] = {
+	{ "capacity", S_IFREG|S_IRUGO, idecd_capacity_proc_show },
+	{}
+};
+
+static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
+{
+	return idecd_proc;
+}
+
+static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
+{
+	return NULL;
+}
+#endif
+
+static const struct cd_list_entry ide_cd_quirks_list[] = {
+	/* SCR-3231 doesn't support the SET_CD_SPEED command. */
+	{ "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT	     },
+	/* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
+	{ "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
+					     IDE_AFLAG_PRE_ATAPI12,	     },
+	/* Vertos 300, some versions of this drive like to talk BCD. */
+	{ "V003S0DS",		     NULL,   IDE_AFLAG_VERTOS_300_SSD,	     },
+	/* Vertos 600 ESD. */
+	{ "V006E0DS",		     NULL,   IDE_AFLAG_VERTOS_600_ESD,	     },
+	/*
+	 * Sanyo 3 CD changer uses a non-standard command for CD changing
+	 * (by default standard ATAPI support for CD changers is used).
+	 */
+	{ "CD-ROM CDR-C3 G",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
+	{ "CD-ROM CDR-C3G",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
+	{ "CD-ROM CDR_C36",	     NULL,   IDE_AFLAG_SANYO_3CD	     },
+	/* Stingray 8X CD-ROM. */
+	{ "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
+	/*
+	 * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
+	 * mode sense page capabilities size, but older drives break.
+	 */
+	{ "ATAPI CD ROM DRIVE 50X MAX",	NULL,	IDE_AFLAG_FULL_CAPS_PAGE     },
+	{ "WPI CDS-32X",		NULL,	IDE_AFLAG_FULL_CAPS_PAGE     },
+	/* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
+	{ "",			     "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
+	/*
+	 * Some drives used by Apple don't advertise audio play
+	 * but they do support reading TOC & audio datas.
+	 */
+	{ "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK	     },
+	{ "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE	     },
+	{ "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE	     },
+	{ NULL, NULL, 0 }
+};
+
+static unsigned int ide_cd_flags(u16 *id)
+{
+	const struct cd_list_entry *cle = ide_cd_quirks_list;
+
+	while (cle->id_model) {
+		if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
+		    (cle->id_firmware == NULL ||
+		     strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
+			return cle->cd_flags;
+		cle++;
+	}
+
+	return 0;
+}
+
+static int ide_cdrom_setup(ide_drive_t *drive)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_device_info *cdi = &cd->devinfo;
+	struct request_queue *q = drive->queue;
+	u16 *id = drive->id;
+	char *fw_rev = (char *)&id[ATA_ID_FW_REV];
+	int nslots;
+
+	ide_debug_log(IDE_DBG_PROBE, "enter");
+
+	drive->prep_rq = ide_cdrom_prep_rq;
+	blk_queue_dma_alignment(q, 31);
+	blk_queue_update_dma_pad(q, 15);
+
+	drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
+	drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
+
+	if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
+	    fw_rev[4] == '1' && fw_rev[6] <= '2')
+		drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
+				     IDE_AFLAG_TOCADDR_AS_BCD);
+	else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
+		 fw_rev[4] == '1' && fw_rev[6] <= '2')
+		drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
+	else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
+		/* 3 => use CD in slot 0 */
+		cdi->sanyo_slot = 3;
+
+	nslots = ide_cdrom_probe_capabilities(drive);
+
+	blk_queue_logical_block_size(q, CD_FRAMESIZE);
+
+	if (ide_cdrom_register(drive, nslots)) {
+		printk(KERN_ERR PFX "%s: %s failed to register device with the"
+				" cdrom driver.\n", drive->name, __func__);
+		cd->devinfo.handle = NULL;
+		return 1;
+	}
+
+	ide_proc_register_driver(drive, cd->driver);
+	return 0;
+}
+
+static void ide_cd_remove(ide_drive_t *drive)
+{
+	struct cdrom_info *info = drive->driver_data;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	ide_proc_unregister_driver(drive, info->driver);
+	device_del(&info->dev);
+	del_gendisk(info->disk);
+
+	mutex_lock(&idecd_ref_mutex);
+	put_device(&info->dev);
+	mutex_unlock(&idecd_ref_mutex);
+}
+
+static void ide_cd_release(struct device *dev)
+{
+	struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
+	struct cdrom_device_info *devinfo = &info->devinfo;
+	ide_drive_t *drive = info->drive;
+	struct gendisk *g = info->disk;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	kfree(info->toc);
+	if (devinfo->handle == drive)
+		unregister_cdrom(devinfo);
+	drive->driver_data = NULL;
+	drive->prep_rq = NULL;
+	g->private_data = NULL;
+	put_disk(g);
+	kfree(info);
+}
+
+static int ide_cd_probe(ide_drive_t *);
+
+static struct ide_driver ide_cdrom_driver = {
+	.gen_driver = {
+		.owner		= THIS_MODULE,
+		.name		= "ide-cdrom",
+		.bus		= &ide_bus_type,
+	},
+	.probe			= ide_cd_probe,
+	.remove			= ide_cd_remove,
+	.version		= IDECD_VERSION,
+	.do_request		= ide_cd_do_request,
+#ifdef CONFIG_IDE_PROC_FS
+	.proc_entries		= ide_cd_proc_entries,
+	.proc_devsets		= ide_cd_proc_devsets,
+#endif
+};
+
+static int idecd_open(struct block_device *bdev, fmode_t mode)
+{
+	struct cdrom_info *info;
+	int rc = -ENXIO;
+
+	if (bdev_check_media_change(bdev)) {
+		info = ide_drv_g(bdev->bd_disk, cdrom_info);
+
+		ide_cd_read_toc(info->drive);
+	}
+
+	mutex_lock(&ide_cd_mutex);
+	info = ide_cd_get(bdev->bd_disk);
+	if (!info)
+		goto out;
+
+	rc = cdrom_open(&info->devinfo, bdev, mode);
+	if (rc < 0)
+		ide_cd_put(info);
+out:
+	mutex_unlock(&ide_cd_mutex);
+	return rc;
+}
+
+static void idecd_release(struct gendisk *disk, fmode_t mode)
+{
+	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
+
+	mutex_lock(&ide_cd_mutex);
+	cdrom_release(&info->devinfo, mode);
+
+	ide_cd_put(info);
+	mutex_unlock(&ide_cd_mutex);
+}
+
+static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
+{
+	struct packet_command cgc;
+	char buffer[16];
+	int stat;
+	char spindown;
+
+	if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
+		return -EFAULT;
+
+	init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
+
+	stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
+	if (stat)
+		return stat;
+
+	buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
+	return cdrom_mode_select(cdi, &cgc);
+}
+
+static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
+{
+	struct packet_command cgc;
+	char buffer[16];
+	int stat;
+	char spindown;
+
+	init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
+
+	stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
+	if (stat)
+		return stat;
+
+	spindown = buffer[11] & 0x0f;
+	if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
+		return -EFAULT;
+	return 0;
+}
+
+static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
+			unsigned int cmd, unsigned long arg)
+{
+	struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
+	int err;
+
+	switch (cmd) {
+	case CDROMSETSPINDOWN:
+		return idecd_set_spindown(&info->devinfo, arg);
+	case CDROMGETSPINDOWN:
+		return idecd_get_spindown(&info->devinfo, arg);
+	default:
+		break;
+	}
+
+	err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
+	if (err == -EINVAL)
+		err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
+
+	return err;
+}
+
+static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	mutex_lock(&ide_cd_mutex);
+	ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
+	mutex_unlock(&ide_cd_mutex);
+
+	return ret;
+}
+
+static int idecd_locked_compat_ioctl(struct block_device *bdev, fmode_t mode,
+			unsigned int cmd, unsigned long arg)
+{
+	struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
+	void __user *argp = compat_ptr(arg);
+	int err;
+
+	switch (cmd) {
+	case CDROMSETSPINDOWN:
+		return idecd_set_spindown(&info->devinfo, (unsigned long)argp);
+	case CDROMGETSPINDOWN:
+		return idecd_get_spindown(&info->devinfo, (unsigned long)argp);
+	default:
+		break;
+	}
+
+	err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
+	if (err == -EINVAL)
+		err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd,
+				  (unsigned long)argp);
+
+	return err;
+}
+
+static int idecd_compat_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	mutex_lock(&ide_cd_mutex);
+	ret = idecd_locked_compat_ioctl(bdev, mode, cmd, arg);
+	mutex_unlock(&ide_cd_mutex);
+
+	return ret;
+}
+
+static unsigned int idecd_check_events(struct gendisk *disk,
+				       unsigned int clearing)
+{
+	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
+	return cdrom_check_events(&info->devinfo, clearing);
+}
+
+static const struct block_device_operations idecd_ops = {
+	.owner			= THIS_MODULE,
+	.open			= idecd_open,
+	.release		= idecd_release,
+	.ioctl			= idecd_ioctl,
+	.compat_ioctl		= IS_ENABLED(CONFIG_COMPAT) ?
+				  idecd_compat_ioctl : NULL,
+	.check_events		= idecd_check_events,
+};
+
+/* module options */
+static unsigned long debug_mask;
+module_param(debug_mask, ulong, 0644);
+
+MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
+
+static int ide_cd_probe(ide_drive_t *drive)
+{
+	struct cdrom_info *info;
+	struct gendisk *g;
+
+	ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
+				     drive->driver_req, drive->media);
+
+	if (!strstr("ide-cdrom", drive->driver_req))
+		goto failed;
+
+	if (drive->media != ide_cdrom && drive->media != ide_optical)
+		goto failed;
+
+	drive->debug_mask = debug_mask;
+	drive->irq_handler = cdrom_newpc_intr;
+
+	info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
+	if (info == NULL) {
+		printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
+				drive->name);
+		goto failed;
+	}
+
+	g = alloc_disk(1 << PARTN_BITS);
+	if (!g)
+		goto out_free_cd;
+
+	ide_init_disk(g, drive);
+
+	info->dev.parent = &drive->gendev;
+	info->dev.release = ide_cd_release;
+	dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
+
+	if (device_register(&info->dev))
+		goto out_free_disk;
+
+	info->drive = drive;
+	info->driver = &ide_cdrom_driver;
+	info->disk = g;
+
+	g->private_data = &info->driver;
+
+	drive->driver_data = info;
+
+	g->minors = 1;
+	g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
+	if (ide_cdrom_setup(drive)) {
+		put_device(&info->dev);
+		goto failed;
+	}
+
+	ide_cd_read_toc(drive);
+	g->fops = &idecd_ops;
+	g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
+	g->events = DISK_EVENT_MEDIA_CHANGE;
+	device_add_disk(&drive->gendev, g, NULL);
+	return 0;
+
+out_free_disk:
+	put_disk(g);
+out_free_cd:
+	kfree(info);
+failed:
+	return -ENODEV;
+}
+
+static void __exit ide_cdrom_exit(void)
+{
+	driver_unregister(&ide_cdrom_driver.gen_driver);
+}
+
+static int __init ide_cdrom_init(void)
+{
+	printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
+	return driver_register(&ide_cdrom_driver.gen_driver);
+}
+
+MODULE_ALIAS("ide:*m-cdrom*");
+MODULE_ALIAS("ide-cd");
+module_init(ide_cdrom_init);
+module_exit(ide_cdrom_exit);
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-cd.h b/drivers/ide/ide-cd.h
new file mode 100644
index 000000000..a69dc7f61
--- /dev/null
+++ b/drivers/ide/ide-cd.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Copyright (C) 1996-98  Erik Andersen
+ *  Copyright (C) 1998-2000 Jens Axboe
+ */
+#ifndef _IDE_CD_H
+#define _IDE_CD_H
+
+#include <linux/cdrom.h>
+#include <asm/byteorder.h>
+
+#define IDECD_DEBUG_LOG		0
+
+#if IDECD_DEBUG_LOG
+#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
+#else
+#define ide_debug_log(lvl, fmt, args...) do {} while (0)
+#endif
+
+#define ATAPI_WAIT_WRITE_BUSY	(10 * HZ)
+
+/************************************************************************/
+
+#define SECTORS_PER_FRAME	(CD_FRAMESIZE >> SECTOR_SHIFT)
+#define SECTOR_BUFFER_SIZE	(CD_FRAMESIZE * 32)
+
+/* Capabilities Page size including 8 bytes of Mode Page Header */
+#define ATAPI_CAPABILITIES_PAGE_SIZE		(8 + 20)
+#define ATAPI_CAPABILITIES_PAGE_PAD_SIZE	4
+
+/* Structure of a MSF cdrom address. */
+struct atapi_msf {
+	u8 reserved;
+	u8 minute;
+	u8 second;
+	u8 frame;
+};
+
+/* Space to hold the disk TOC. */
+#define MAX_TRACKS 99
+struct atapi_toc_header {
+	unsigned short toc_length;
+	u8 first_track;
+	u8 last_track;
+};
+
+struct atapi_toc_entry {
+	u8 reserved1;
+#if defined(__BIG_ENDIAN_BITFIELD)
+	u8 adr     : 4;
+	u8 control : 4;
+#elif defined(__LITTLE_ENDIAN_BITFIELD)
+	u8 control : 4;
+	u8 adr     : 4;
+#else
+#error "Please fix <asm/byteorder.h>"
+#endif
+	u8 track;
+	u8 reserved2;
+	union {
+		unsigned lba;
+		struct atapi_msf msf;
+	} addr;
+};
+
+struct atapi_toc {
+	int    last_session_lba;
+	int    xa_flag;
+	unsigned long capacity;
+	struct atapi_toc_header hdr;
+	struct atapi_toc_entry  ent[MAX_TRACKS+1];
+	  /* One extra for the leadout. */
+};
+
+/* Extra per-device info for cdrom drives. */
+struct cdrom_info {
+	ide_drive_t		*drive;
+	struct ide_driver	*driver;
+	struct gendisk		*disk;
+	struct device		dev;
+
+	/* Buffer for table of contents.  NULL if we haven't allocated
+	   a TOC buffer for this device yet. */
+
+	struct atapi_toc *toc;
+
+	u8 max_speed;		/* Max speed of the drive. */
+	u8 current_speed;	/* Current speed of the drive. */
+
+        /* Per-device info needed by cdrom.c generic driver. */
+        struct cdrom_device_info devinfo;
+
+	unsigned long write_timeout;
+};
+
+/* ide-cd_verbose.c */
+void ide_cd_log_error(const char *, struct request *, struct request_sense *);
+
+/* ide-cd.c functions used by ide-cd_ioctl.c */
+int ide_cd_queue_pc(ide_drive_t *, const unsigned char *, int, void *,
+		    unsigned *, struct scsi_sense_hdr *, int, req_flags_t);
+int ide_cd_read_toc(ide_drive_t *);
+int ide_cdrom_get_capabilities(ide_drive_t *, u8 *);
+void ide_cdrom_update_speed(ide_drive_t *, u8 *);
+int cdrom_check_status(ide_drive_t *, struct scsi_sense_hdr *);
+
+/* ide-cd_ioctl.c */
+int ide_cdrom_open_real(struct cdrom_device_info *, int);
+void ide_cdrom_release_real(struct cdrom_device_info *);
+int ide_cdrom_drive_status(struct cdrom_device_info *, int);
+unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *,
+					 unsigned int clearing, int slot_nr);
+int ide_cdrom_tray_move(struct cdrom_device_info *, int);
+int ide_cdrom_lock_door(struct cdrom_device_info *, int);
+int ide_cdrom_select_speed(struct cdrom_device_info *, int);
+int ide_cdrom_get_last_session(struct cdrom_device_info *,
+			       struct cdrom_multisession *);
+int ide_cdrom_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *);
+int ide_cdrom_reset(struct cdrom_device_info *cdi);
+int ide_cdrom_audio_ioctl(struct cdrom_device_info *, unsigned int, void *);
+int ide_cdrom_packet(struct cdrom_device_info *, struct packet_command *);
+
+#endif /* _IDE_CD_H */
diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
new file mode 100644
index 000000000..46f2df288
--- /dev/null
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -0,0 +1,468 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cdrom.c IOCTLs handling for ide-cd driver.
+ *
+ * Copyright (C) 1994-1996  Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998  Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000  Jens Axboe <axboe@suse.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/cdrom.h>
+#include <linux/gfp.h>
+#include <linux/ide.h>
+#include <scsi/scsi.h>
+
+#include "ide-cd.h"
+
+/****************************************************************************
+ * Other driver requests (open, close, check media change).
+ */
+int ide_cdrom_open_real(struct cdrom_device_info *cdi, int purpose)
+{
+	return 0;
+}
+
+/*
+ * Close down the device.  Invalidate all cached blocks.
+ */
+void ide_cdrom_release_real(struct cdrom_device_info *cdi)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	if (!cdi->use_count)
+		drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
+}
+
+/*
+ * add logic to try GET_EVENT command first to check for media and tray
+ * status. this should be supported by newer cd-r/w and all DVD etc
+ * drives
+ */
+int ide_cdrom_drive_status(struct cdrom_device_info *cdi, int slot_nr)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct media_event_desc med;
+	struct scsi_sense_hdr sshdr;
+	int stat;
+
+	if (slot_nr != CDSL_CURRENT)
+		return -EINVAL;
+
+	stat = cdrom_check_status(drive, &sshdr);
+	if (!stat || sshdr.sense_key == UNIT_ATTENTION)
+		return CDS_DISC_OK;
+
+	if (!cdrom_get_media_event(cdi, &med)) {
+		if (med.media_present)
+			return CDS_DISC_OK;
+		else if (med.door_open)
+			return CDS_TRAY_OPEN;
+		else
+			return CDS_NO_DISC;
+	}
+
+	if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04
+			&& sshdr.ascq == 0x04)
+		return CDS_DISC_OK;
+
+	/*
+	 * If not using Mt Fuji extended media tray reports,
+	 * just return TRAY_OPEN since ATAPI doesn't provide
+	 * any other way to detect this...
+	 */
+	if (sshdr.sense_key == NOT_READY) {
+		if (sshdr.asc == 0x3a && sshdr.ascq == 1)
+			return CDS_NO_DISC;
+		else
+			return CDS_TRAY_OPEN;
+	}
+	return CDS_DRIVE_NOT_READY;
+}
+
+/*
+ * ide-cd always generates media changed event if media is missing, which
+ * makes it impossible to use for proper event reporting, so
+ * DISK_EVENT_FLAG_UEVENT is cleared in disk->event_flags
+ * and the following function is used only to trigger
+ * revalidation and never propagated to userland.
+ */
+unsigned int ide_cdrom_check_events_real(struct cdrom_device_info *cdi,
+					 unsigned int clearing, int slot_nr)
+{
+	ide_drive_t *drive = cdi->handle;
+	int retval;
+
+	if (slot_nr == CDSL_CURRENT) {
+		(void) cdrom_check_status(drive, NULL);
+		retval = (drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED) ? 1 : 0;
+		drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
+		return retval ? DISK_EVENT_MEDIA_CHANGE : 0;
+	} else {
+		return 0;
+	}
+}
+
+/* Eject the disk if EJECTFLAG is 0.
+   If EJECTFLAG is 1, try to reload the disk. */
+static
+int cdrom_eject(ide_drive_t *drive, int ejectflag)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_device_info *cdi = &cd->devinfo;
+	char loej = 0x02;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	if ((drive->atapi_flags & IDE_AFLAG_NO_EJECT) && !ejectflag)
+		return -EDRIVE_CANT_DO_THIS;
+
+	/* reload fails on some drives, if the tray is locked */
+	if ((drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED) && ejectflag)
+		return 0;
+
+	/* only tell drive to close tray if open, if it can do that */
+	if (ejectflag && (cdi->mask & CDC_CLOSE_TRAY))
+		loej = 0;
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_START_STOP_UNIT;
+	cmd[4] = loej | (ejectflag != 0);
+
+	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+}
+
+/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
+static
+int ide_cd_lockdoor(ide_drive_t *drive, int lockflag)
+{
+	struct scsi_sense_hdr sshdr;
+	int stat;
+
+	/* If the drive cannot lock the door, just pretend. */
+	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) {
+		stat = 0;
+	} else {
+		unsigned char cmd[BLK_MAX_CDB];
+
+		memset(cmd, 0, BLK_MAX_CDB);
+
+		cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
+		cmd[4] = lockflag ? 1 : 0;
+
+		stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
+				       &sshdr, 0, 0);
+	}
+
+	/* If we got an illegal field error, the drive
+	   probably cannot lock the door. */
+	if (stat != 0 &&
+	    sshdr.sense_key == ILLEGAL_REQUEST &&
+	    (sshdr.asc == 0x24 || sshdr.asc == 0x20)) {
+		printk(KERN_ERR "%s: door locking not supported\n",
+			drive->name);
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+		stat = 0;
+	}
+
+	/* no medium, that's alright. */
+	if (stat != 0 && sshdr.sense_key == NOT_READY && sshdr.asc == 0x3a)
+		stat = 0;
+
+	if (stat == 0) {
+		if (lockflag)
+			drive->atapi_flags |= IDE_AFLAG_DOOR_LOCKED;
+		else
+			drive->atapi_flags &= ~IDE_AFLAG_DOOR_LOCKED;
+	}
+
+	return stat;
+}
+
+int ide_cdrom_tray_move(struct cdrom_device_info *cdi, int position)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	if (position) {
+		int stat = ide_cd_lockdoor(drive, 0);
+
+		if (stat)
+			return stat;
+	}
+
+	return cdrom_eject(drive, !position);
+}
+
+int ide_cdrom_lock_door(struct cdrom_device_info *cdi, int lock)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	return ide_cd_lockdoor(drive, lock);
+}
+
+/*
+ * ATAPI devices are free to select the speed you request or any slower
+ * rate. :-(  Requesting too fast a speed will _not_ produce an error.
+ */
+int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *cd = drive->driver_data;
+	u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
+	int stat;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	if (speed == 0)
+		speed = 0xffff; /* set to max */
+	else
+		speed *= 177;   /* Nx to kbytes/s */
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_SET_SPEED;
+	/* Read Drive speed in kbytes/second MSB/LSB */
+	cmd[2] = (speed >> 8) & 0xff;
+	cmd[3] = speed & 0xff;
+	if ((cdi->mask & (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) !=
+	    (CDC_CD_R | CDC_CD_RW | CDC_DVD_R)) {
+		/* Write Drive speed in kbytes/second MSB/LSB */
+		cmd[4] = (speed >> 8) & 0xff;
+		cmd[5] = speed & 0xff;
+	}
+
+	stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+
+	if (!ide_cdrom_get_capabilities(drive, buf)) {
+		ide_cdrom_update_speed(drive, buf);
+		cdi->speed = cd->current_speed;
+	}
+
+	return 0;
+}
+
+int ide_cdrom_get_last_session(struct cdrom_device_info *cdi,
+			       struct cdrom_multisession *ms_info)
+{
+	struct atapi_toc *toc;
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *info = drive->driver_data;
+	int ret;
+
+	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0 || !info->toc) {
+		ret = ide_cd_read_toc(drive);
+		if (ret)
+			return ret;
+	}
+
+	toc = info->toc;
+	ms_info->addr.lba = toc->last_session_lba;
+	ms_info->xa_flag = toc->xa_flag;
+
+	return 0;
+}
+
+int ide_cdrom_get_mcn(struct cdrom_device_info *cdi,
+		      struct cdrom_mcn *mcn_info)
+{
+	ide_drive_t *drive = cdi->handle;
+	int stat, mcnlen;
+	char buf[24];
+	unsigned char cmd[BLK_MAX_CDB];
+	unsigned len = sizeof(buf);
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_READ_SUBCHANNEL;
+	cmd[1] = 2;		/* MSF addressing */
+	cmd[2] = 0x40;	/* request subQ data */
+	cmd[3] = 2;		/* format */
+	cmd[8] = len;
+
+	stat = ide_cd_queue_pc(drive, cmd, 0, buf, &len, NULL, 0, 0);
+	if (stat)
+		return stat;
+
+	mcnlen = sizeof(mcn_info->medium_catalog_number) - 1;
+	memcpy(mcn_info->medium_catalog_number, buf + 9, mcnlen);
+	mcn_info->medium_catalog_number[mcnlen] = '\0';
+
+	return 0;
+}
+
+int ide_cdrom_reset(struct cdrom_device_info *cdi)
+{
+	ide_drive_t *drive = cdi->handle;
+	struct cdrom_info *cd = drive->driver_data;
+	struct request *rq;
+	int ret;
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	rq->rq_flags = RQF_QUIET;
+	blk_execute_rq(drive->queue, cd->disk, rq, 0);
+	ret = scsi_req(rq)->result ? -EIO : 0;
+	blk_put_request(rq);
+	/*
+	 * A reset will unlock the door. If it was previously locked,
+	 * lock it again.
+	 */
+	if (drive->atapi_flags & IDE_AFLAG_DOOR_LOCKED)
+		(void)ide_cd_lockdoor(drive, 1);
+
+	return ret;
+}
+
+static int ide_cd_get_toc_entry(ide_drive_t *drive, int track,
+				struct atapi_toc_entry **ent)
+{
+	struct cdrom_info *info = drive->driver_data;
+	struct atapi_toc *toc = info->toc;
+	int ntracks;
+
+	/*
+	 * don't serve cached data, if the toc isn't valid
+	 */
+	if ((drive->atapi_flags & IDE_AFLAG_TOC_VALID) == 0)
+		return -EINVAL;
+
+	/* Check validity of requested track number. */
+	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+
+	if (toc->hdr.first_track == CDROM_LEADOUT)
+		ntracks = 0;
+
+	if (track == CDROM_LEADOUT)
+		*ent = &toc->ent[ntracks];
+	else if (track < toc->hdr.first_track || track > toc->hdr.last_track)
+		return -EINVAL;
+	else
+		*ent = &toc->ent[track - toc->hdr.first_track];
+
+	return 0;
+}
+
+static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_ti *ti = arg;
+	struct atapi_toc_entry *first_toc, *last_toc;
+	unsigned long lba_start, lba_end;
+	int stat;
+	unsigned char cmd[BLK_MAX_CDB];
+
+	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
+	if (stat)
+		return stat;
+
+	stat = ide_cd_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
+	if (stat)
+		return stat;
+
+	if (ti->cdti_trk1 != CDROM_LEADOUT)
+		++last_toc;
+	lba_start = first_toc->addr.lba;
+	lba_end   = last_toc->addr.lba;
+
+	if (lba_end <= lba_start)
+		return -EINVAL;
+
+	memset(cmd, 0, BLK_MAX_CDB);
+
+	cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+	lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
+	lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
+
+	return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, NULL, 0, 0);
+}
+
+static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_info *cd = drive->driver_data;
+	struct cdrom_tochdr *tochdr = arg;
+	struct atapi_toc *toc;
+	int stat;
+
+	/* Make sure our saved TOC is valid. */
+	stat = ide_cd_read_toc(drive);
+	if (stat)
+		return stat;
+
+	toc = cd->toc;
+	tochdr->cdth_trk0 = toc->hdr.first_track;
+	tochdr->cdth_trk1 = toc->hdr.last_track;
+
+	return 0;
+}
+
+static int ide_cd_read_tocentry(ide_drive_t *drive, void *arg)
+{
+	struct cdrom_tocentry *tocentry = arg;
+	struct atapi_toc_entry *toce;
+	int stat;
+
+	stat = ide_cd_get_toc_entry(drive, tocentry->cdte_track, &toce);
+	if (stat)
+		return stat;
+
+	tocentry->cdte_ctrl = toce->control;
+	tocentry->cdte_adr  = toce->adr;
+	if (tocentry->cdte_format == CDROM_MSF) {
+		lba_to_msf(toce->addr.lba,
+			   &tocentry->cdte_addr.msf.minute,
+			   &tocentry->cdte_addr.msf.second,
+			   &tocentry->cdte_addr.msf.frame);
+	} else
+		tocentry->cdte_addr.lba = toce->addr.lba;
+
+	return 0;
+}
+
+int ide_cdrom_audio_ioctl(struct cdrom_device_info *cdi,
+			  unsigned int cmd, void *arg)
+{
+	ide_drive_t *drive = cdi->handle;
+
+	switch (cmd) {
+	/*
+	 * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
+	 * atapi doesn't support it
+	 */
+	case CDROMPLAYTRKIND:
+		return ide_cd_fake_play_trkind(drive, arg);
+	case CDROMREADTOCHDR:
+		return ide_cd_read_tochdr(drive, arg);
+	case CDROMREADTOCENTRY:
+		return ide_cd_read_tocentry(drive, arg);
+	default:
+		return -EINVAL;
+	}
+}
+
+/* the generic packet interface to cdrom.c */
+int ide_cdrom_packet(struct cdrom_device_info *cdi,
+			    struct packet_command *cgc)
+{
+	ide_drive_t *drive = cdi->handle;
+	req_flags_t flags = 0;
+	unsigned len = cgc->buflen;
+
+	if (cgc->timeout <= 0)
+		cgc->timeout = ATAPI_WAIT_PC;
+
+	/* here we queue the commands from the uniform CD-ROM
+	   layer. the packet must be complete, as we do not
+	   touch it at all. */
+
+	if (cgc->sshdr)
+		memset(cgc->sshdr, 0, sizeof(*cgc->sshdr));
+
+	if (cgc->quiet)
+		flags |= RQF_QUIET;
+
+	cgc->stat = ide_cd_queue_pc(drive, cgc->cmd,
+				    cgc->data_direction == CGC_DATA_WRITE,
+				    cgc->buffer, &len,
+				    cgc->sshdr, cgc->timeout, flags);
+	if (!cgc->stat)
+		cgc->buflen -= len;
+	return cgc->stat;
+}
diff --git a/drivers/ide/ide-cd_verbose.c b/drivers/ide/ide-cd_verbose.c
new file mode 100644
index 000000000..5ecd5b2f0
--- /dev/null
+++ b/drivers/ide/ide-cd_verbose.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Verbose error logging for ATAPI CD/DVD devices.
+ *
+ * Copyright (C) 1994-1996  Scott Snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998  Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000  Jens Axboe <axboe@suse.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/blkdev.h>
+#include <linux/cdrom.h>
+#include <linux/ide.h>
+#include <scsi/scsi.h>
+#include "ide-cd.h"
+
+#ifndef CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS
+void ide_cd_log_error(const char *name, struct request *failed_command,
+		      struct request_sense *sense)
+{
+	/* Suppress printing unit attention and `in progress of becoming ready'
+	   errors when we're not being verbose. */
+	if (sense->sense_key == UNIT_ATTENTION ||
+	    (sense->sense_key == NOT_READY && (sense->asc == 4 ||
+						sense->asc == 0x3a)))
+		return;
+
+	printk(KERN_ERR "%s: error code: 0x%02x  sense_key: 0x%02x  "
+			"asc: 0x%02x  ascq: 0x%02x\n",
+			name, sense->error_code, sense->sense_key,
+			sense->asc, sense->ascq);
+}
+#else
+/* The generic packet command opcodes for CD/DVD Logical Units,
+ * From Table 57 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
+static const struct {
+	unsigned short packet_command;
+	const char * const text;
+} packet_command_texts[] = {
+	{ GPCMD_TEST_UNIT_READY, "Test Unit Ready" },
+	{ GPCMD_REQUEST_SENSE, "Request Sense" },
+	{ GPCMD_FORMAT_UNIT, "Format Unit" },
+	{ GPCMD_INQUIRY, "Inquiry" },
+	{ GPCMD_START_STOP_UNIT, "Start/Stop Unit" },
+	{ GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL, "Prevent/Allow Medium Removal" },
+	{ GPCMD_READ_FORMAT_CAPACITIES, "Read Format Capacities" },
+	{ GPCMD_READ_CDVD_CAPACITY, "Read Cd/Dvd Capacity" },
+	{ GPCMD_READ_10, "Read 10" },
+	{ GPCMD_WRITE_10, "Write 10" },
+	{ GPCMD_SEEK, "Seek" },
+	{ GPCMD_WRITE_AND_VERIFY_10, "Write and Verify 10" },
+	{ GPCMD_VERIFY_10, "Verify 10" },
+	{ GPCMD_FLUSH_CACHE, "Flush Cache" },
+	{ GPCMD_READ_SUBCHANNEL, "Read Subchannel" },
+	{ GPCMD_READ_TOC_PMA_ATIP, "Read Table of Contents" },
+	{ GPCMD_READ_HEADER, "Read Header" },
+	{ GPCMD_PLAY_AUDIO_10, "Play Audio 10" },
+	{ GPCMD_GET_CONFIGURATION, "Get Configuration" },
+	{ GPCMD_PLAY_AUDIO_MSF, "Play Audio MSF" },
+	{ GPCMD_PLAYAUDIO_TI, "Play Audio TrackIndex" },
+	{ GPCMD_GET_EVENT_STATUS_NOTIFICATION,
+		"Get Event Status Notification" },
+	{ GPCMD_PAUSE_RESUME, "Pause/Resume" },
+	{ GPCMD_STOP_PLAY_SCAN, "Stop Play/Scan" },
+	{ GPCMD_READ_DISC_INFO, "Read Disc Info" },
+	{ GPCMD_READ_TRACK_RZONE_INFO, "Read Track Rzone Info" },
+	{ GPCMD_RESERVE_RZONE_TRACK, "Reserve Rzone Track" },
+	{ GPCMD_SEND_OPC, "Send OPC" },
+	{ GPCMD_MODE_SELECT_10, "Mode Select 10" },
+	{ GPCMD_REPAIR_RZONE_TRACK, "Repair Rzone Track" },
+	{ GPCMD_MODE_SENSE_10, "Mode Sense 10" },
+	{ GPCMD_CLOSE_TRACK, "Close Track" },
+	{ GPCMD_BLANK, "Blank" },
+	{ GPCMD_SEND_EVENT, "Send Event" },
+	{ GPCMD_SEND_KEY, "Send Key" },
+	{ GPCMD_REPORT_KEY, "Report Key" },
+	{ GPCMD_LOAD_UNLOAD, "Load/Unload" },
+	{ GPCMD_SET_READ_AHEAD, "Set Read-ahead" },
+	{ GPCMD_READ_12, "Read 12" },
+	{ GPCMD_GET_PERFORMANCE, "Get Performance" },
+	{ GPCMD_SEND_DVD_STRUCTURE, "Send DVD Structure" },
+	{ GPCMD_READ_DVD_STRUCTURE, "Read DVD Structure" },
+	{ GPCMD_SET_STREAMING, "Set Streaming" },
+	{ GPCMD_READ_CD_MSF, "Read CD MSF" },
+	{ GPCMD_SCAN, "Scan" },
+	{ GPCMD_SET_SPEED, "Set Speed" },
+	{ GPCMD_PLAY_CD, "Play CD" },
+	{ GPCMD_MECHANISM_STATUS, "Mechanism Status" },
+	{ GPCMD_READ_CD, "Read CD" },
+};
+
+/* From Table 303 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
+static const char * const sense_key_texts[16] = {
+	"No sense data",
+	"Recovered error",
+	"Not ready",
+	"Medium error",
+	"Hardware error",
+	"Illegal request",
+	"Unit attention",
+	"Data protect",
+	"Blank check",
+	"(reserved)",
+	"(reserved)",
+	"Aborted command",
+	"(reserved)",
+	"(reserved)",
+	"Miscompare",
+	"(reserved)",
+};
+
+/* From Table 304 of the SFF8090 Ver. 3 (Mt. Fuji) draft standard. */
+static const struct {
+	unsigned long asc_ascq;
+	const char * const text;
+} sense_data_texts[] = {
+	{ 0x000000, "No additional sense information" },
+	{ 0x000011, "Play operation in progress" },
+	{ 0x000012, "Play operation paused" },
+	{ 0x000013, "Play operation successfully completed" },
+	{ 0x000014, "Play operation stopped due to error" },
+	{ 0x000015, "No current audio status to return" },
+	{ 0x010c0a, "Write error - padding blocks added" },
+	{ 0x011700, "Recovered data with no error correction applied" },
+	{ 0x011701, "Recovered data with retries" },
+	{ 0x011702, "Recovered data with positive head offset" },
+	{ 0x011703, "Recovered data with negative head offset" },
+	{ 0x011704, "Recovered data with retries and/or CIRC applied" },
+	{ 0x011705, "Recovered data using previous sector ID" },
+	{ 0x011800, "Recovered data with error correction applied" },
+	{ 0x011801, "Recovered data with error correction and retries applied"},
+	{ 0x011802, "Recovered data - the data was auto-reallocated" },
+	{ 0x011803, "Recovered data with CIRC" },
+	{ 0x011804, "Recovered data with L-EC" },
+	{ 0x015d00, "Failure prediction threshold exceeded"
+		    " - Predicted logical unit failure" },
+	{ 0x015d01, "Failure prediction threshold exceeded"
+		    " - Predicted media failure" },
+	{ 0x015dff, "Failure prediction threshold exceeded - False" },
+	{ 0x017301, "Power calibration area almost full" },
+	{ 0x020400, "Logical unit not ready - cause not reportable" },
+	/* Following is misspelled in ATAPI 2.6, _and_ in Mt. Fuji */
+	{ 0x020401, "Logical unit not ready"
+		    " - in progress [sic] of becoming ready" },
+	{ 0x020402, "Logical unit not ready - initializing command required" },
+	{ 0x020403, "Logical unit not ready - manual intervention required" },
+	{ 0x020404, "Logical unit not ready - format in progress" },
+	{ 0x020407, "Logical unit not ready - operation in progress" },
+	{ 0x020408, "Logical unit not ready - long write in progress" },
+	{ 0x020600, "No reference position found (media may be upside down)" },
+	{ 0x023000, "Incompatible medium installed" },
+	{ 0x023a00, "Medium not present" },
+	{ 0x025300, "Media load or eject failed" },
+	{ 0x025700, "Unable to recover table of contents" },
+	{ 0x030300, "Peripheral device write fault" },
+	{ 0x030301, "No write current" },
+	{ 0x030302, "Excessive write errors" },
+	{ 0x030c00, "Write error" },
+	{ 0x030c01, "Write error - Recovered with auto reallocation" },
+	{ 0x030c02, "Write error - auto reallocation failed" },
+	{ 0x030c03, "Write error - recommend reassignment" },
+	{ 0x030c04, "Compression check miscompare error" },
+	{ 0x030c05, "Data expansion occurred during compress" },
+	{ 0x030c06, "Block not compressible" },
+	{ 0x030c07, "Write error - recovery needed" },
+	{ 0x030c08, "Write error - recovery failed" },
+	{ 0x030c09, "Write error - loss of streaming" },
+	{ 0x031100, "Unrecovered read error" },
+	{ 0x031106, "CIRC unrecovered error" },
+	{ 0x033101, "Format command failed" },
+	{ 0x033200, "No defect spare location available" },
+	{ 0x033201, "Defect list update failure" },
+	{ 0x035100, "Erase failure" },
+	{ 0x037200, "Session fixation error" },
+	{ 0x037201, "Session fixation error writin lead-in" },
+	{ 0x037202, "Session fixation error writin lead-out" },
+	{ 0x037300, "CD control error" },
+	{ 0x037302, "Power calibration area is full" },
+	{ 0x037303, "Power calibration area error" },
+	{ 0x037304, "Program memory area / RMA update failure" },
+	{ 0x037305, "Program memory area / RMA is full" },
+	{ 0x037306, "Program memory area / RMA is (almost) full" },
+	{ 0x040200, "No seek complete" },
+	{ 0x040300, "Write fault" },
+	{ 0x040900, "Track following error" },
+	{ 0x040901, "Tracking servo failure" },
+	{ 0x040902, "Focus servo failure" },
+	{ 0x040903, "Spindle servo failure" },
+	{ 0x041500, "Random positioning error" },
+	{ 0x041501, "Mechanical positioning or changer error" },
+	{ 0x041502, "Positioning error detected by read of medium" },
+	{ 0x043c00, "Mechanical positioning or changer error" },
+	{ 0x044000, "Diagnostic failure on component (ASCQ)" },
+	{ 0x044400, "Internal CD/DVD logical unit failure" },
+	{ 0x04b600, "Media load mechanism failed" },
+	{ 0x051a00, "Parameter list length error" },
+	{ 0x052000, "Invalid command operation code" },
+	{ 0x052100, "Logical block address out of range" },
+	{ 0x052102, "Invalid address for write" },
+	{ 0x052400, "Invalid field in command packet" },
+	{ 0x052600, "Invalid field in parameter list" },
+	{ 0x052601, "Parameter not supported" },
+	{ 0x052602, "Parameter value invalid" },
+	{ 0x052700, "Write protected media" },
+	{ 0x052c00, "Command sequence error" },
+	{ 0x052c03, "Current program area is not empty" },
+	{ 0x052c04, "Current program area is empty" },
+	{ 0x053001, "Cannot read medium - unknown format" },
+	{ 0x053002, "Cannot read medium - incompatible format" },
+	{ 0x053900, "Saving parameters not supported" },
+	{ 0x054e00, "Overlapped commands attempted" },
+	{ 0x055302, "Medium removal prevented" },
+	{ 0x055500, "System resource failure" },
+	{ 0x056300, "End of user area encountered on this track" },
+	{ 0x056400, "Illegal mode for this track or incompatible medium" },
+	{ 0x056f00, "Copy protection key exchange failure"
+		    " - Authentication failure" },
+	{ 0x056f01, "Copy protection key exchange failure - Key not present" },
+	{ 0x056f02, "Copy protection key exchange failure"
+		     " - Key not established" },
+	{ 0x056f03, "Read of scrambled sector without authentication" },
+	{ 0x056f04, "Media region code is mismatched to logical unit" },
+	{ 0x056f05, "Drive region must be permanent"
+		    " / region reset count error" },
+	{ 0x057203, "Session fixation error - incomplete track in session" },
+	{ 0x057204, "Empty or partially written reserved track" },
+	{ 0x057205, "No more RZONE reservations are allowed" },
+	{ 0x05bf00, "Loss of streaming" },
+	{ 0x062800, "Not ready to ready transition, medium may have changed" },
+	{ 0x062900, "Power on, reset or hardware reset occurred" },
+	{ 0x062a00, "Parameters changed" },
+	{ 0x062a01, "Mode parameters changed" },
+	{ 0x062e00, "Insufficient time for operation" },
+	{ 0x063f00, "Logical unit operating conditions have changed" },
+	{ 0x063f01, "Microcode has been changed" },
+	{ 0x065a00, "Operator request or state change input (unspecified)" },
+	{ 0x065a01, "Operator medium removal request" },
+	{ 0x0bb900, "Play operation aborted" },
+	/* Here we use 0xff for the key (not a valid key) to signify
+	 * that these can have _any_ key value associated with them... */
+	{ 0xff0401, "Logical unit is in process of becoming ready" },
+	{ 0xff0400, "Logical unit not ready, cause not reportable" },
+	{ 0xff0402, "Logical unit not ready, initializing command required" },
+	{ 0xff0403, "Logical unit not ready, manual intervention required" },
+	{ 0xff0500, "Logical unit does not respond to selection" },
+	{ 0xff0800, "Logical unit communication failure" },
+	{ 0xff0802, "Logical unit communication parity error" },
+	{ 0xff0801, "Logical unit communication time-out" },
+	{ 0xff2500, "Logical unit not supported" },
+	{ 0xff4c00, "Logical unit failed self-configuration" },
+	{ 0xff3e00, "Logical unit has not self-configured yet" },
+};
+
+void ide_cd_log_error(const char *name, struct request *failed_command,
+		      struct request_sense *sense)
+{
+	int i;
+	const char *s = "bad sense key!";
+	char buf[80];
+
+	printk(KERN_ERR "ATAPI device %s:\n", name);
+	if (sense->error_code == 0x70)
+		printk(KERN_CONT "  Error: ");
+	else if (sense->error_code == 0x71)
+		printk("  Deferred Error: ");
+	else if (sense->error_code == 0x7f)
+		printk(KERN_CONT "  Vendor-specific Error: ");
+	else
+		printk(KERN_CONT "  Unknown Error Type: ");
+
+	if (sense->sense_key < ARRAY_SIZE(sense_key_texts))
+		s = sense_key_texts[sense->sense_key];
+
+	printk(KERN_CONT "%s -- (Sense key=0x%02x)\n", s, sense->sense_key);
+
+	if (sense->asc == 0x40) {
+		sprintf(buf, "Diagnostic failure on component 0x%02x",
+			sense->ascq);
+		s = buf;
+	} else {
+		int lo = 0, mid, hi = ARRAY_SIZE(sense_data_texts);
+		unsigned long key = (sense->sense_key << 16);
+
+		key |= (sense->asc << 8);
+		if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd))
+			key |= sense->ascq;
+		s = NULL;
+
+		while (hi > lo) {
+			mid = (lo + hi) / 2;
+			if (sense_data_texts[mid].asc_ascq == key ||
+			    sense_data_texts[mid].asc_ascq == (0xff0000|key)) {
+				s = sense_data_texts[mid].text;
+				break;
+			} else if (sense_data_texts[mid].asc_ascq > key)
+				hi = mid;
+			else
+				lo = mid + 1;
+		}
+	}
+
+	if (s == NULL) {
+		if (sense->asc > 0x80)
+			s = "(vendor-specific error)";
+		else
+			s = "(reserved error code)";
+	}
+
+	printk(KERN_ERR "  %s -- (asc=0x%02x, ascq=0x%02x)\n",
+			s, sense->asc, sense->ascq);
+
+	if (failed_command != NULL) {
+		int lo = 0, mid, hi = ARRAY_SIZE(packet_command_texts);
+		s = NULL;
+
+		while (hi > lo) {
+			mid = (lo + hi) / 2;
+			if (packet_command_texts[mid].packet_command ==
+			    scsi_req(failed_command)->cmd[0]) {
+				s = packet_command_texts[mid].text;
+				break;
+			}
+			if (packet_command_texts[mid].packet_command >
+			    scsi_req(failed_command)->cmd[0])
+				hi = mid;
+			else
+				lo = mid + 1;
+		}
+
+		printk(KERN_ERR "  The failed \"%s\" packet command "
+				"was: \n  \"", s);
+		for (i = 0; i < BLK_MAX_CDB; i++)
+			printk(KERN_CONT "%02x ", scsi_req(failed_command)->cmd[i]);
+		printk(KERN_CONT "\"\n");
+	}
+
+	/* The SKSV bit specifies validity of the sense_key_specific
+	 * in the next two commands. It is bit 7 of the first byte.
+	 * In the case of NOT_READY, if SKSV is set the drive can
+	 * give us nice ETA readings.
+	 */
+	if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) {
+		int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100;
+
+		printk(KERN_ERR "  Command is %02d%% complete\n",
+				progress / 0xffff);
+	}
+
+	if (sense->sense_key == ILLEGAL_REQUEST &&
+	    (sense->sks[0] & 0x80) != 0) {
+		printk(KERN_ERR "  Error in %s byte %d",
+				(sense->sks[0] & 0x40) != 0 ?
+				"command packet" : "command data",
+				(sense->sks[1] << 8) + sense->sks[2]);
+
+		if ((sense->sks[0] & 0x40) != 0)
+			printk(KERN_CONT " bit %d", sense->sks[0] & 0x07);
+
+		printk(KERN_CONT "\n");
+	}
+}
+#endif
diff --git a/drivers/ide/ide-cs.c b/drivers/ide/ide-cs.c
new file mode 100644
index 000000000..f1e922e24
--- /dev/null
+++ b/drivers/ide/ide-cs.c
@@ -0,0 +1,364 @@
+/*======================================================================
+
+    A driver for PCMCIA IDE/ATA disk cards
+
+    The contents of this file are subject to the Mozilla Public
+    License Version 1.1 (the "License"); you may not use this file
+    except in compliance with the License. You may obtain a copy of
+    the License at http://www.mozilla.org/MPL/
+
+    Software distributed under the License is distributed on an "AS
+    IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+    implied. See the License for the specific language governing
+    rights and limitations under the License.
+
+    The initial developer of the original code is David A. Hinds
+    <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
+    are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
+
+    Alternatively, the contents of this file may be used under the
+    terms of the GNU General Public License version 2 (the "GPL"), in
+    which case the provisions of the GPL are applicable instead of the
+    above.  If you wish to allow the use of your version of this file
+    only under the terms of the GPL and not to allow others to use
+    your version of this file under the MPL, indicate your decision
+    by deleting the provisions above and replace them with the notice
+    and other provisions required by the GPL.  If you do not delete
+    the provisions above, a recipient may use your version of this
+    file under either the MPL or the GPL.
+
+======================================================================*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ioport.h>
+#include <linux/ide.h>
+#include <linux/major.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+
+#define DRV_NAME "ide-cs"
+
+/*====================================================================*/
+
+/* Module parameters */
+
+MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
+MODULE_DESCRIPTION("PCMCIA ATA/IDE card driver");
+MODULE_LICENSE("Dual MPL/GPL");
+
+/*====================================================================*/
+
+typedef struct ide_info_t {
+	struct pcmcia_device	*p_dev;
+	struct ide_host		*host;
+	int			ndev;
+} ide_info_t;
+
+static void ide_release(struct pcmcia_device *);
+static int ide_config(struct pcmcia_device *);
+
+static void ide_detach(struct pcmcia_device *p_dev);
+
+static int ide_probe(struct pcmcia_device *link)
+{
+    ide_info_t *info;
+
+    dev_dbg(&link->dev, "ide_attach()\n");
+
+    /* Create new ide device */
+    info = kzalloc(sizeof(*info), GFP_KERNEL);
+    if (!info)
+	return -ENOMEM;
+
+    info->p_dev = link;
+    link->priv = info;
+
+    link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO |
+	    CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC;
+
+    return ide_config(link);
+} /* ide_attach */
+
+static void ide_detach(struct pcmcia_device *link)
+{
+    ide_info_t *info = link->priv;
+
+    dev_dbg(&link->dev, "ide_detach(0x%p)\n", link);
+
+    ide_release(link);
+
+    kfree(info);
+} /* ide_detach */
+
+static const struct ide_port_ops idecs_port_ops = {
+	.quirkproc		= ide_undecoded_slave,
+};
+
+static const struct ide_port_info idecs_port_info = {
+	.port_ops		= &idecs_port_ops,
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_pci,
+};
+
+static struct ide_host *idecs_register(unsigned long io, unsigned long ctl,
+				unsigned long irq, struct pcmcia_device *handle)
+{
+    struct ide_host *host;
+    ide_hwif_t *hwif;
+    int i, rc;
+    struct ide_hw hw, *hws[] = { &hw };
+
+    if (!request_region(io, 8, DRV_NAME)) {
+	printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+			DRV_NAME, io, io + 7);
+	return NULL;
+    }
+
+    if (!request_region(ctl, 1, DRV_NAME)) {
+	printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+			DRV_NAME, ctl);
+	release_region(io, 8);
+	return NULL;
+    }
+
+    memset(&hw, 0, sizeof(hw));
+    ide_std_init_ports(&hw, io, ctl);
+    hw.irq = irq;
+    hw.dev = &handle->dev;
+
+    rc = ide_host_add(&idecs_port_info, hws, 1, &host);
+    if (rc)
+	goto out_release;
+
+    hwif = host->ports[0];
+
+    if (hwif->present)
+	return host;
+
+    /* retry registration in case device is still spinning up */
+    for (i = 0; i < 10; i++) {
+	msleep(100);
+	ide_port_scan(hwif);
+	if (hwif->present)
+	    return host;
+    }
+
+    return host;
+
+out_release:
+    release_region(ctl, 1);
+    release_region(io, 8);
+    return NULL;
+}
+
+static int pcmcia_check_one_config(struct pcmcia_device *pdev, void *priv_data)
+{
+	int *is_kme = priv_data;
+
+	if ((pdev->resource[0]->flags & IO_DATA_PATH_WIDTH)
+	    != IO_DATA_PATH_WIDTH_8) {
+		pdev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+		pdev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
+	}
+	pdev->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
+	pdev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
+
+	if (pdev->resource[1]->end) {
+		pdev->resource[0]->end = 8;
+		pdev->resource[1]->end = (*is_kme) ? 2 : 1;
+	} else {
+		if (pdev->resource[0]->end < 16)
+			return -ENODEV;
+	}
+
+	return pcmcia_request_io(pdev);
+}
+
+static int ide_config(struct pcmcia_device *link)
+{
+    ide_info_t *info = link->priv;
+    int ret = 0, is_kme = 0;
+    unsigned long io_base, ctl_base;
+    struct ide_host *host;
+
+    dev_dbg(&link->dev, "ide_config(0x%p)\n", link);
+
+    is_kme = ((link->manf_id == MANFID_KME) &&
+	      ((link->card_id == PRODID_KME_KXLC005_A) ||
+	       (link->card_id == PRODID_KME_KXLC005_B)));
+
+    if (pcmcia_loop_config(link, pcmcia_check_one_config, &is_kme)) {
+	    link->config_flags &= ~CONF_AUTO_CHECK_VCC;
+	    if (pcmcia_loop_config(link, pcmcia_check_one_config, &is_kme))
+		    goto failed; /* No suitable config found */
+    }
+    io_base = link->resource[0]->start;
+    if (link->resource[1]->end)
+	    ctl_base = link->resource[1]->start;
+    else
+	    ctl_base = link->resource[0]->start + 0x0e;
+
+    if (!link->irq)
+	    goto failed;
+
+    ret = pcmcia_enable_device(link);
+    if (ret)
+	    goto failed;
+
+    /* disable drive interrupts during IDE probe */
+    outb(0x02, ctl_base);
+
+    /* special setup for KXLC005 card */
+    if (is_kme)
+	outb(0x81, ctl_base+1);
+
+     host = idecs_register(io_base, ctl_base, link->irq, link);
+     if (host == NULL && resource_size(link->resource[0]) == 0x20) {
+	    outb(0x02, ctl_base + 0x10);
+	    host = idecs_register(io_base + 0x10, ctl_base + 0x10,
+				  link->irq, link);
+    }
+
+    if (host == NULL)
+	goto failed;
+
+    info->ndev = 1;
+    info->host = host;
+    dev_info(&link->dev, "ide-cs: hd%c: Vpp = %d.%d\n",
+	    'a' + host->ports[0]->index * 2,
+	    link->vpp / 10, link->vpp % 10);
+
+    return 0;
+
+failed:
+    ide_release(link);
+    return -ENODEV;
+} /* ide_config */
+
+static void ide_release(struct pcmcia_device *link)
+{
+    ide_info_t *info = link->priv;
+    struct ide_host *host = info->host;
+
+    dev_dbg(&link->dev, "ide_release(0x%p)\n", link);
+
+    if (info->ndev) {
+	ide_hwif_t *hwif = host->ports[0];
+	unsigned long data_addr, ctl_addr;
+
+	data_addr = hwif->io_ports.data_addr;
+	ctl_addr = hwif->io_ports.ctl_addr;
+
+	ide_host_remove(host);
+	info->ndev = 0;
+
+	release_region(ctl_addr, 1);
+	release_region(data_addr, 8);
+    }
+
+    pcmcia_disable_device(link);
+} /* ide_release */
+
+
+static const struct pcmcia_device_id ide_ids[] = {
+	PCMCIA_DEVICE_FUNC_ID(4),
+	PCMCIA_DEVICE_MANF_CARD(0x0000, 0x0000),	/* Corsair */
+	PCMCIA_DEVICE_MANF_CARD(0x0007, 0x0000),	/* Hitachi */
+	PCMCIA_DEVICE_MANF_CARD(0x000a, 0x0000),	/* I-O Data CFA */
+	PCMCIA_DEVICE_MANF_CARD(0x001c, 0x0001),	/* Mitsubishi CFA */
+	PCMCIA_DEVICE_MANF_CARD(0x0032, 0x0704),
+	PCMCIA_DEVICE_MANF_CARD(0x0032, 0x2904),
+	PCMCIA_DEVICE_MANF_CARD(0x0045, 0x0401),	/* SanDisk CFA */
+	PCMCIA_DEVICE_MANF_CARD(0x004f, 0x0000),	/* Kingston */
+	PCMCIA_DEVICE_MANF_CARD(0x0097, 0x1620), 	/* TI emulated */
+	PCMCIA_DEVICE_MANF_CARD(0x0098, 0x0000),	/* Toshiba */
+	PCMCIA_DEVICE_MANF_CARD(0x00a4, 0x002d),
+	PCMCIA_DEVICE_MANF_CARD(0x00ce, 0x0000),	/* Samsung */
+	PCMCIA_DEVICE_MANF_CARD(0x0319, 0x0000),	/* Hitachi */
+	PCMCIA_DEVICE_MANF_CARD(0x2080, 0x0001),
+	PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0100),	/* Viking CFA */
+	PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0200),	/* Lexar, Viking CFA */
+	PCMCIA_DEVICE_PROD_ID123("Caravelle", "PSC-IDE ", "PSC000", 0x8c36137c, 0xd0693ab8, 0x2768a9f0),
+	PCMCIA_DEVICE_PROD_ID123("CDROM", "IDE", "MCD-601p", 0x1b9179ca, 0xede88951, 0x0d902f74),
+	PCMCIA_DEVICE_PROD_ID123("PCMCIA", "IDE CARD", "F1", 0x281f1c5d, 0x1907960c, 0xf7fde8b9),
+	PCMCIA_DEVICE_PROD_ID12("ARGOSY", "CD-ROM", 0x78f308dc, 0x66536591),
+	PCMCIA_DEVICE_PROD_ID12("ARGOSY", "PnPIDE", 0x78f308dc, 0x0c694728),
+	PCMCIA_DEVICE_PROD_ID12("CNF   ", "CD-ROM", 0x46d7db81, 0x66536591),
+	PCMCIA_DEVICE_PROD_ID12("CNF CD-M", "CD-ROM", 0x7d93b852, 0x66536591),
+	PCMCIA_DEVICE_PROD_ID12("Creative Technology Ltd.", "PCMCIA CD-ROM Interface Card", 0xff8c8a45, 0xfe8020c4),
+	PCMCIA_DEVICE_PROD_ID12("Digital Equipment Corporation.", "Digital Mobile Media CD-ROM", 0x17692a66, 0xef1dcbde),
+	PCMCIA_DEVICE_PROD_ID12("EXP", "CD+GAME", 0x6f58c983, 0x63c13aaf),
+	PCMCIA_DEVICE_PROD_ID12("EXP   ", "CD-ROM", 0x0a5c52fd, 0x66536591),
+	PCMCIA_DEVICE_PROD_ID12("EXP   ", "PnPIDE", 0x0a5c52fd, 0x0c694728),
+	PCMCIA_DEVICE_PROD_ID12("FREECOM", "PCCARD-IDE", 0x5714cbf7, 0x48e0ab8e),
+	PCMCIA_DEVICE_PROD_ID12("HITACHI", "FLASH", 0xf4f43949, 0x9eb86aae),
+	PCMCIA_DEVICE_PROD_ID12("HITACHI", "microdrive", 0xf4f43949, 0xa6d76178),
+	PCMCIA_DEVICE_PROD_ID12("Hyperstone", "Model1", 0x3d5b9ef5, 0xca6ab420),
+	PCMCIA_DEVICE_PROD_ID12("IBM", "microdrive", 0xb569a6e5, 0xa6d76178),
+	PCMCIA_DEVICE_PROD_ID12("IBM", "IBM17JSSFP20", 0xb569a6e5, 0xf2508753),
+	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF CARD 1GB", 0x2e6d1829, 0x55d5bffb),
+	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF CARD 4GB", 0x2e6d1829, 0x531e7d10),
+	PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF8GB", 0x2e6d1829, 0xacbe682e),
+	PCMCIA_DEVICE_PROD_ID12("IO DATA", "CBIDE2      ", 0x547e66dc, 0x8671043b),
+	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDE", 0x547e66dc, 0x5c5ab149),
+	PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDEII", 0x547e66dc, 0xb3662674),
+	PCMCIA_DEVICE_PROD_ID12("LOOKMEET", "CBIDE2      ", 0xe37be2b5, 0x8671043b),
+	PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF300", 0x7ed2ad87, 0x7e9e78ee),
+	PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF500", 0x7ed2ad87, 0x7a13045c),
+	PCMCIA_DEVICE_PROD_ID2("NinjaATA-", 0xebe0bd79),
+	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "CD-ROM", 0x281f1c5d, 0x66536591),
+	PCMCIA_DEVICE_PROD_ID12("PCMCIA", "PnPIDE", 0x281f1c5d, 0x0c694728),
+	PCMCIA_DEVICE_PROD_ID12("SHUTTLE TECHNOLOGY LTD.", "PCCARD-IDE/ATAPI Adapter", 0x4a3f0ba0, 0x322560e1),
+	PCMCIA_DEVICE_PROD_ID12("SEAGATE", "ST1", 0x87c1b330, 0xe1f30883),
+	PCMCIA_DEVICE_PROD_ID12("SAMSUNG", "04/05/06", 0x43d74cb4, 0x6a22777d),
+	PCMCIA_DEVICE_PROD_ID12("SMI VENDOR", "SMI PRODUCT", 0x30896c92, 0x703cc5f6),
+	PCMCIA_DEVICE_PROD_ID12("TOSHIBA", "MK2001MPL", 0xb4585a1a, 0x3489e003),
+	PCMCIA_DEVICE_PROD_ID1("TRANSCEND    512M   ", 0xd0909443),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF45", 0x709b1bf1, 0xf68b6f32),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF80", 0x709b1bf1, 0x2a54d4b1),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS2GCF120", 0x709b1bf1, 0x969aa4f2),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS4GCF120", 0x709b1bf1, 0xf54a91c8),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS4GCF133", 0x709b1bf1, 0x7558f133),
+	PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS8GCF133", 0x709b1bf1, 0xb2f89b47),
+	PCMCIA_DEVICE_PROD_ID12("WIT", "IDE16", 0x244e5994, 0x3e232852),
+	PCMCIA_DEVICE_PROD_ID12("WEIDA", "TWTTI", 0xcc7cf69c, 0x212bb918),
+	PCMCIA_DEVICE_PROD_ID1("STI Flash", 0xe4a13209),
+	PCMCIA_DEVICE_PROD_ID12("STI", "Flash 5.0", 0xbf2df18d, 0x8cb57a0e),
+	PCMCIA_MFC_DEVICE_PROD_ID12(1, "SanDisk", "ConnectPlus", 0x7a954bd9, 0x74be00c6),
+	PCMCIA_DEVICE_PROD_ID2("Flash Card", 0x5a362506),
+	PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, ide_ids);
+
+static struct pcmcia_driver ide_cs_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "ide-cs",
+	.probe		= ide_probe,
+	.remove		= ide_detach,
+	.id_table       = ide_ids,
+};
+
+static int __init init_ide_cs(void)
+{
+	return pcmcia_register_driver(&ide_cs_driver);
+}
+
+static void __exit exit_ide_cs(void)
+{
+	pcmcia_unregister_driver(&ide_cs_driver);
+}
+
+late_initcall(init_ide_cs);
+module_exit(exit_ide_cs);
diff --git a/drivers/ide/ide-devsets.c b/drivers/ide/ide-devsets.c
new file mode 100644
index 000000000..f2f93ed40
--- /dev/null
+++ b/drivers/ide/ide-devsets.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/kernel.h>
+#include <linux/gfp.h>
+#include <linux/ide.h>
+
+DEFINE_MUTEX(ide_setting_mtx);
+
+ide_devset_get(io_32bit, io_32bit);
+
+static int set_io_32bit(ide_drive_t *drive, int arg)
+{
+	if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
+		return -EPERM;
+
+	if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
+		return -EINVAL;
+
+	drive->io_32bit = arg;
+
+	return 0;
+}
+
+ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);
+
+static int set_ksettings(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;
+
+	return 0;
+}
+
+ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);
+
+static int set_using_dma(ide_drive_t *drive, int arg)
+{
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	int err = -EPERM;
+
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (ata_id_has_dma(drive->id) == 0)
+		goto out;
+
+	if (drive->hwif->dma_ops == NULL)
+		goto out;
+
+	err = 0;
+
+	if (arg) {
+		if (ide_set_dma(drive))
+			err = -EIO;
+	} else
+		ide_dma_off(drive);
+
+out:
+	return err;
+#else
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	return -EPERM;
+#endif
+}
+
+/*
+ * handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
+ */
+static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
+{
+	switch (req_pio) {
+	case 202:
+	case 201:
+	case 200:
+	case 102:
+	case 101:
+	case 100:
+		return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
+	case 9:
+	case 8:
+		return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
+	case 7:
+	case 6:
+		return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
+	default:
+		return 0;
+	}
+}
+
+static int set_pio_mode(ide_drive_t *drive, int arg)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+
+	if (arg < 0 || arg > 255)
+		return -EINVAL;
+
+	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
+	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
+		return -ENOSYS;
+
+	if (set_pio_mode_abuse(drive->hwif, arg)) {
+		drive->pio_mode = arg + XFER_PIO_0;
+
+		if (arg == 8 || arg == 9) {
+			unsigned long flags;
+
+			/* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */
+			spin_lock_irqsave(&hwif->lock, flags);
+			port_ops->set_pio_mode(hwif, drive);
+			spin_unlock_irqrestore(&hwif->lock, flags);
+		} else
+			port_ops->set_pio_mode(hwif, drive);
+	} else {
+		int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+
+		ide_set_pio(drive, arg);
+
+		if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
+			if (keep_dma)
+				ide_dma_on(drive);
+		}
+	}
+
+	return 0;
+}
+
+ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);
+
+static int set_unmaskirq(ide_drive_t *drive, int arg)
+{
+	if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
+		return -EPERM;
+
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_UNMASK;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+
+	return 0;
+}
+
+ide_ext_devset_rw_sync(io_32bit, io_32bit);
+ide_ext_devset_rw_sync(keepsettings, ksettings);
+ide_ext_devset_rw_sync(unmaskirq, unmaskirq);
+ide_ext_devset_rw_sync(using_dma, using_dma);
+__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode);
+
+int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
+		       int arg)
+{
+	struct request_queue *q = drive->queue;
+	struct request *rq;
+	int ret = 0;
+
+	if (!(setting->flags & DS_SYNC))
+		return setting->set(drive, arg);
+
+	rq = blk_get_request(q, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	scsi_req(rq)->cmd_len = 5;
+	scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
+	*(int *)&scsi_req(rq)->cmd[1] = arg;
+	ide_req(rq)->special = setting->set;
+
+	blk_execute_rq(q, NULL, rq, 0);
+	ret = scsi_req(rq)->result;
+	blk_put_request(rq);
+
+	return ret;
+}
+
+ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
+{
+	int err, (*setfunc)(ide_drive_t *, int) = ide_req(rq)->special;
+
+	err = setfunc(drive, *(int *)&scsi_req(rq)->cmd[1]);
+	if (err)
+		scsi_req(rq)->result = err;
+	ide_complete_rq(drive, 0, blk_rq_bytes(rq));
+	return ide_stopped;
+}
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
new file mode 100644
index 000000000..34b944108
--- /dev/null
+++ b/drivers/ide/ide-disk.c
@@ -0,0 +1,795 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 1994-1998	   Linus Torvalds & authors (see below)
+ *  Copyright (C) 1998-2002	   Linux ATA Development
+ *				      Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003		   Red Hat
+ *  Copyright (C) 2003-2005, 2007  Bartlomiej Zolnierkiewicz
+ */
+
+/*
+ *  Mostly written by Mark Lord <mlord@pobox.com>
+ *                and Gadi Oxman <gadio@netvision.net.il>
+ *                and Andre Hedrick <andre@linux-ide.org>
+ *
+ * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/leds.h>
+#include <linux/ide.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+#include <asm/div64.h>
+
+#include "ide-disk.h"
+
+static const u8 ide_rw_cmds[] = {
+	ATA_CMD_READ_MULTI,
+	ATA_CMD_WRITE_MULTI,
+	ATA_CMD_READ_MULTI_EXT,
+	ATA_CMD_WRITE_MULTI_EXT,
+	ATA_CMD_PIO_READ,
+	ATA_CMD_PIO_WRITE,
+	ATA_CMD_PIO_READ_EXT,
+	ATA_CMD_PIO_WRITE_EXT,
+	ATA_CMD_READ,
+	ATA_CMD_WRITE,
+	ATA_CMD_READ_EXT,
+	ATA_CMD_WRITE_EXT,
+};
+
+static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma)
+{
+	u8 index, lba48, write;
+
+	lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
+	write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
+
+	if (dma) {
+		cmd->protocol = ATA_PROT_DMA;
+		index = 8;
+	} else {
+		cmd->protocol = ATA_PROT_PIO;
+		if (drive->mult_count) {
+			cmd->tf_flags |= IDE_TFLAG_MULTI_PIO;
+			index = 0;
+		} else
+			index = 4;
+	}
+
+	cmd->tf.command = ide_rw_cmds[index + lba48 + write];
+}
+
+/*
+ * __ide_do_rw_disk() issues READ and WRITE commands to a disk,
+ * using LBA if supported, or CHS otherwise, to address sectors.
+ */
+static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
+					sector_t block)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	u16 nsectors		= (u16)blk_rq_sectors(rq);
+	u8 lba48		= !!(drive->dev_flags & IDE_DFLAG_LBA48);
+	u8 dma			= !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
+	struct ide_cmd		cmd;
+	struct ide_taskfile	*tf = &cmd.tf;
+	ide_startstop_t		rc;
+
+	if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
+		if (block + blk_rq_sectors(rq) > 1ULL << 28)
+			dma = 0;
+		else
+			lba48 = 0;
+	}
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	if (drive->dev_flags & IDE_DFLAG_LBA) {
+		if (lba48) {
+			pr_debug("%s: LBA=0x%012llx\n", drive->name,
+					(unsigned long long)block);
+
+			tf->nsect  = nsectors & 0xff;
+			tf->lbal   = (u8) block;
+			tf->lbam   = (u8)(block >>  8);
+			tf->lbah   = (u8)(block >> 16);
+			tf->device = ATA_LBA;
+
+			tf = &cmd.hob;
+			tf->nsect = (nsectors >> 8) & 0xff;
+			tf->lbal  = (u8)(block >> 24);
+			if (sizeof(block) != 4) {
+				tf->lbam = (u8)((u64)block >> 32);
+				tf->lbah = (u8)((u64)block >> 40);
+			}
+
+			cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+			cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+			cmd.tf_flags |= IDE_TFLAG_LBA48;
+		} else {
+			tf->nsect  = nsectors & 0xff;
+			tf->lbal   = block;
+			tf->lbam   = block >>= 8;
+			tf->lbah   = block >>= 8;
+			tf->device = ((block >> 8) & 0xf) | ATA_LBA;
+		}
+	} else {
+		unsigned int sect, head, cyl, track;
+
+		track = (int)block / drive->sect;
+		sect  = (int)block % drive->sect + 1;
+		head  = track % drive->head;
+		cyl   = track / drive->head;
+
+		pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
+
+		tf->nsect  = nsectors & 0xff;
+		tf->lbal   = sect;
+		tf->lbam   = cyl;
+		tf->lbah   = cyl >> 8;
+		tf->device = head;
+	}
+
+	cmd.tf_flags |= IDE_TFLAG_FS;
+
+	if (rq_data_dir(rq))
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+	ide_tf_set_cmd(drive, &cmd, dma);
+	cmd.rq = rq;
+
+	if (dma == 0) {
+		ide_init_sg_cmd(&cmd, nsectors << 9);
+		ide_map_sg(drive, &cmd);
+	}
+
+	rc = do_rw_taskfile(drive, &cmd);
+
+	if (rc == ide_stopped && dma) {
+		/* fallback to PIO */
+		cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
+		ide_tf_set_cmd(drive, &cmd, 0);
+		ide_init_sg_cmd(&cmd, nsectors << 9);
+		rc = do_rw_taskfile(drive, &cmd);
+	}
+
+	return rc;
+}
+
+/*
+ * 268435455  == 137439 MB or 28bit limit
+ * 320173056  == 163929 MB or 48bit addressing
+ * 1073741822 == 549756 MB or 48bit addressing fake drive
+ */
+
+static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
+				      sector_t block)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED);
+	BUG_ON(blk_rq_is_passthrough(rq));
+
+	ledtrig_disk_activity(rq_data_dir(rq) == WRITE);
+
+	pr_debug("%s: %sing: block=%llu, sectors=%u\n",
+		 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
+		 (unsigned long long)block, blk_rq_sectors(rq));
+
+	if (hwif->rw_disk)
+		hwif->rw_disk(drive, rq);
+
+	return __ide_do_rw_disk(drive, rq, block);
+}
+
+/*
+ * Queries for true maximum capacity of the drive.
+ * Returns maximum LBA address (> 0) of the drive, 0 if failed.
+ */
+static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+	u64 addr = 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (lba48)
+		tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
+	else
+		tf->command = ATA_CMD_READ_NATIVE_MAX;
+	tf->device  = ATA_LBA;
+
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	if (lba48) {
+		cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+		cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+		cmd.tf_flags = IDE_TFLAG_LBA48;
+	}
+
+	ide_no_data_taskfile(drive, &cmd);
+
+	/* if OK, compute maximum address value */
+	if (!(tf->status & ATA_ERR))
+		addr = ide_get_lba_addr(&cmd, lba48) + 1;
+
+	return addr;
+}
+
+/*
+ * Sets maximum virtual LBA address of the drive.
+ * Returns new maximum virtual LBA address (> 0) or 0 on failure.
+ */
+static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+	u64 addr_set = 0;
+
+	addr_req--;
+
+	memset(&cmd, 0, sizeof(cmd));
+	tf->lbal     = (addr_req >>  0) & 0xff;
+	tf->lbam     = (addr_req >>= 8) & 0xff;
+	tf->lbah     = (addr_req >>= 8) & 0xff;
+	if (lba48) {
+		cmd.hob.lbal = (addr_req >>= 8) & 0xff;
+		cmd.hob.lbam = (addr_req >>= 8) & 0xff;
+		cmd.hob.lbah = (addr_req >>= 8) & 0xff;
+		tf->command  = ATA_CMD_SET_MAX_EXT;
+	} else {
+		tf->device   = (addr_req >>= 8) & 0x0f;
+		tf->command  = ATA_CMD_SET_MAX;
+	}
+	tf->device |= ATA_LBA;
+
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	if (lba48) {
+		cmd.valid.out.hob = IDE_VALID_OUT_HOB;
+		cmd.valid.in.hob  = IDE_VALID_IN_HOB;
+		cmd.tf_flags = IDE_TFLAG_LBA48;
+	}
+
+	ide_no_data_taskfile(drive, &cmd);
+
+	/* if OK, compute maximum address value */
+	if (!(tf->status & ATA_ERR))
+		addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
+
+	return addr_set;
+}
+
+static unsigned long long sectors_to_MB(unsigned long long n)
+{
+	n <<= 9;		/* make it bytes */
+	do_div(n, 1000000);	/* make it MB */
+	return n;
+}
+
+/*
+ * Some disks report total number of sectors instead of
+ * maximum sector address.  We list them here.
+ */
+static const struct drive_list_entry hpa_list[] = {
+	{ "ST340823A",	NULL },
+	{ "ST320413A",	NULL },
+	{ "ST310211A",	NULL },
+	{ NULL,		NULL }
+};
+
+static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
+{
+	u64 capacity, set_max;
+
+	capacity = drive->capacity64;
+	set_max  = idedisk_read_native_max_address(drive, lba48);
+
+	if (ide_in_drive_list(drive->id, hpa_list)) {
+		/*
+		 * Since we are inclusive wrt to firmware revisions do this
+		 * extra check and apply the workaround only when needed.
+		 */
+		if (set_max == capacity + 1)
+			set_max--;
+	}
+
+	return set_max;
+}
+
+static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
+{
+	set_max = idedisk_set_max_address(drive, set_max, lba48);
+	if (set_max)
+		drive->capacity64 = set_max;
+
+	return set_max;
+}
+
+static void idedisk_check_hpa(ide_drive_t *drive)
+{
+	u64 capacity, set_max;
+	int lba48 = ata_id_lba48_enabled(drive->id);
+
+	capacity = drive->capacity64;
+	set_max  = ide_disk_hpa_get_native_capacity(drive, lba48);
+
+	if (set_max <= capacity)
+		return;
+
+	drive->probed_capacity = set_max;
+
+	printk(KERN_INFO "%s: Host Protected Area detected.\n"
+			 "\tcurrent capacity is %llu sectors (%llu MB)\n"
+			 "\tnative  capacity is %llu sectors (%llu MB)\n",
+			 drive->name,
+			 capacity, sectors_to_MB(capacity),
+			 set_max, sectors_to_MB(set_max));
+
+	if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
+		return;
+
+	set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
+	if (set_max)
+		printk(KERN_INFO "%s: Host Protected Area disabled.\n",
+				 drive->name);
+}
+
+static int ide_disk_get_capacity(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	int lba;
+
+	if (ata_id_lba48_enabled(id)) {
+		/* drive speaks 48-bit LBA */
+		lba = 1;
+		drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
+	} else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
+		/* drive speaks 28-bit LBA */
+		lba = 1;
+		drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
+	} else {
+		/* drive speaks boring old 28-bit CHS */
+		lba = 0;
+		drive->capacity64 = drive->cyl * drive->head * drive->sect;
+	}
+
+	drive->probed_capacity = drive->capacity64;
+
+	if (lba) {
+		drive->dev_flags |= IDE_DFLAG_LBA;
+
+		/*
+		* If this device supports the Host Protected Area feature set,
+		* then we may need to change our opinion about its capacity.
+		*/
+		if (ata_id_hpa_enabled(id))
+			idedisk_check_hpa(drive);
+	}
+
+	/* limit drive capacity to 137GB if LBA48 cannot be used */
+	if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
+	    drive->capacity64 > 1ULL << 28) {
+		printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
+		       "%llu sectors (%llu MB)\n",
+		       drive->name, (unsigned long long)drive->capacity64,
+		       sectors_to_MB(drive->capacity64));
+		drive->probed_capacity = drive->capacity64 = 1ULL << 28;
+	}
+
+	if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
+	    (drive->dev_flags & IDE_DFLAG_LBA48)) {
+		if (drive->capacity64 > 1ULL << 28) {
+			printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
+					 " will be used for accessing sectors "
+					 "> %u\n", drive->name, 1 << 28);
+		} else
+			drive->dev_flags &= ~IDE_DFLAG_LBA48;
+	}
+
+	return 0;
+}
+
+static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	int lba48 = ata_id_lba48_enabled(id);
+
+	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
+	    ata_id_hpa_enabled(id) == 0)
+		return;
+
+	/*
+	 * according to the spec the SET MAX ADDRESS command shall be
+	 * immediately preceded by a READ NATIVE MAX ADDRESS command
+	 */
+	if (!ide_disk_hpa_get_native_capacity(drive, lba48))
+		return;
+
+	if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48))
+		drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
+}
+
+static bool idedisk_prep_rq(ide_drive_t *drive, struct request *rq)
+{
+	struct ide_cmd *cmd;
+
+	if (req_op(rq) != REQ_OP_FLUSH)
+		return true;
+
+	if (ide_req(rq)->special) {
+		cmd = ide_req(rq)->special;
+		memset(cmd, 0, sizeof(*cmd));
+	} else {
+		cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC);
+	}
+
+	/* FIXME: map struct ide_taskfile on rq->cmd[] */
+	BUG_ON(cmd == NULL);
+
+	if (ata_id_flush_ext_enabled(drive->id) &&
+	    (drive->capacity64 >= (1UL << 28)))
+		cmd->tf.command = ATA_CMD_FLUSH_EXT;
+	else
+		cmd->tf.command = ATA_CMD_FLUSH;
+	cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd->tf_flags = IDE_TFLAG_DYN;
+	cmd->protocol = ATA_PROT_NODATA;
+	rq->cmd_flags &= ~REQ_OP_MASK;
+	rq->cmd_flags |= REQ_OP_DRV_OUT;
+	ide_req(rq)->type = ATA_PRIV_TASKFILE;
+	ide_req(rq)->special = cmd;
+	cmd->rq = rq;
+
+	return true;
+}
+
+ide_devset_get(multcount, mult_count);
+
+/*
+ * This is tightly woven into the driver->do_special can not touch.
+ * DON'T do it again until a total personality rewrite is committed.
+ */
+static int set_multcount(ide_drive_t *drive, int arg)
+{
+	struct request *rq;
+
+	if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff))
+		return -EINVAL;
+
+	if (drive->special_flags & IDE_SFLAG_SET_MULTMODE)
+		return -EBUSY;
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_TASKFILE;
+
+	drive->mult_req = arg;
+	drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
+	blk_execute_rq(drive->queue, NULL, rq, 0);
+	blk_put_request(rq);
+
+	return (drive->mult_count == arg) ? 0 : -EIO;
+}
+
+ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
+
+static int set_nowerr(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_NOWERR;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_NOWERR;
+
+	drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
+
+	return 0;
+}
+
+static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect)
+{
+	struct ide_cmd cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.feature = feature;
+	cmd.tf.nsect   = nsect;
+	cmd.tf.command = ATA_CMD_SET_FEATURES;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+static void update_flush(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	bool wc = false;
+
+	if (drive->dev_flags & IDE_DFLAG_WCACHE) {
+		unsigned long long capacity;
+		int barrier;
+		/*
+		 * We must avoid issuing commands a drive does not
+		 * understand or we may crash it. We check flush cache
+		 * is supported. We also check we have the LBA48 flush
+		 * cache if the drive capacity is too large. By this
+		 * time we have trimmed the drive capacity if LBA48 is
+		 * not available so we don't need to recheck that.
+		 */
+		capacity = ide_gd_capacity(drive);
+		barrier = ata_id_flush_enabled(id) &&
+			(drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 &&
+			((drive->dev_flags & IDE_DFLAG_LBA48) == 0 ||
+			 capacity <= (1ULL << 28) ||
+			 ata_id_flush_ext_enabled(id));
+
+		printk(KERN_INFO "%s: cache flushes %ssupported\n",
+		       drive->name, barrier ? "" : "not ");
+
+		if (barrier) {
+			wc = true;
+			drive->prep_rq = idedisk_prep_rq;
+		}
+	}
+
+	blk_queue_write_cache(drive->queue, wc, false);
+}
+
+ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
+
+static int set_wcache(ide_drive_t *drive, int arg)
+{
+	int err = 1;
+
+	if (arg < 0 || arg > 1)
+		return -EINVAL;
+
+	if (ata_id_flush_enabled(drive->id)) {
+		err = ide_do_setfeature(drive,
+			arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0);
+		if (err == 0) {
+			if (arg)
+				drive->dev_flags |= IDE_DFLAG_WCACHE;
+			else
+				drive->dev_flags &= ~IDE_DFLAG_WCACHE;
+		}
+	}
+
+	update_flush(drive);
+
+	return err;
+}
+
+static int do_idedisk_flushcache(ide_drive_t *drive)
+{
+	struct ide_cmd cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (ata_id_flush_ext_enabled(drive->id))
+		cmd.tf.command = ATA_CMD_FLUSH_EXT;
+	else
+		cmd.tf.command = ATA_CMD_FLUSH;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+ide_devset_get(acoustic, acoustic);
+
+static int set_acoustic(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 254)
+		return -EINVAL;
+
+	ide_do_setfeature(drive,
+		arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg);
+
+	drive->acoustic = arg;
+
+	return 0;
+}
+
+ide_devset_get_flag(addressing, IDE_DFLAG_LBA48);
+
+/*
+ * drive->addressing:
+ *	0: 28-bit
+ *	1: 48-bit
+ *	2: 48-bit capable doing 28-bit
+ */
+static int set_addressing(ide_drive_t *drive, int arg)
+{
+	if (arg < 0 || arg > 2)
+		return -EINVAL;
+
+	if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+	    ata_id_lba48_enabled(drive->id) == 0))
+		return -EIO;
+
+	if (arg == 2)
+		arg = 0;
+
+	if (arg)
+		drive->dev_flags |= IDE_DFLAG_LBA48;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_LBA48;
+
+	return 0;
+}
+
+ide_ext_devset_rw(acoustic, acoustic);
+ide_ext_devset_rw(address, addressing);
+ide_ext_devset_rw(multcount, multcount);
+ide_ext_devset_rw(wcache, wcache);
+
+ide_ext_devset_rw_sync(nowerr, nowerr);
+
+static int ide_disk_check(ide_drive_t *drive, const char *s)
+{
+	return 1;
+}
+
+static void ide_disk_setup(ide_drive_t *drive)
+{
+	struct ide_disk_obj *idkp = drive->driver_data;
+	struct request_queue *q = drive->queue;
+	ide_hwif_t *hwif = drive->hwif;
+	u16 *id = drive->id;
+	char *m = (char *)&id[ATA_ID_PROD];
+	unsigned long long capacity;
+
+	ide_proc_register_driver(drive, idkp->driver);
+
+	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0)
+		return;
+
+	if (drive->dev_flags & IDE_DFLAG_REMOVABLE) {
+		/*
+		 * Removable disks (eg. SYQUEST); ignore 'WD' drives
+		 */
+		if (m[0] != 'W' || m[1] != 'D')
+			drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
+	}
+
+	(void)set_addressing(drive, 1);
+
+	if (drive->dev_flags & IDE_DFLAG_LBA48) {
+		int max_s = 2048;
+
+		if (max_s > hwif->rqsize)
+			max_s = hwif->rqsize;
+
+		blk_queue_max_hw_sectors(q, max_s);
+	}
+
+	printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
+	       queue_max_sectors(q) / 2);
+
+	if (ata_id_is_ssd(id)) {
+		blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
+		blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q);
+	}
+
+	/* calculate drive capacity, and select LBA if possible */
+	ide_disk_get_capacity(drive);
+
+	/*
+	 * if possible, give fdisk access to more of the drive,
+	 * by correcting bios_cyls:
+	 */
+	capacity = ide_gd_capacity(drive);
+
+	if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) {
+		if (ata_id_lba48_enabled(drive->id)) {
+			/* compatibility */
+			drive->bios_sect = 63;
+			drive->bios_head = 255;
+		}
+
+		if (drive->bios_sect && drive->bios_head) {
+			unsigned int cap0 = capacity; /* truncate to 32 bits */
+			unsigned int cylsz, cyl;
+
+			if (cap0 != capacity)
+				drive->bios_cyl = 65535;
+			else {
+				cylsz = drive->bios_sect * drive->bios_head;
+				cyl = cap0 / cylsz;
+				if (cyl > 65535)
+					cyl = 65535;
+				if (cyl > drive->bios_cyl)
+					drive->bios_cyl = cyl;
+			}
+		}
+	}
+	printk(KERN_INFO "%s: %llu sectors (%llu MB)",
+			 drive->name, capacity, sectors_to_MB(capacity));
+
+	/* Only print cache size when it was specified */
+	if (id[ATA_ID_BUF_SIZE])
+		printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2);
+
+	printk(KERN_CONT ", CHS=%d/%d/%d\n",
+			 drive->bios_cyl, drive->bios_head, drive->bios_sect);
+
+	/* write cache enabled? */
+	if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id))
+		drive->dev_flags |= IDE_DFLAG_WCACHE;
+
+	set_wcache(drive, 1);
+
+	if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 &&
+	    (drive->head == 0 || drive->head > 16))
+		printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n",
+			drive->name, drive->head);
+}
+
+static void ide_disk_flush(ide_drive_t *drive)
+{
+	if (ata_id_flush_enabled(drive->id) == 0 ||
+	    (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
+		return;
+
+	if (do_idedisk_flushcache(drive))
+		printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
+}
+
+static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
+{
+	return 0;
+}
+
+static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
+				 int on)
+{
+	struct ide_cmd cmd;
+	int ret;
+
+	if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
+		return 0;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	ret = ide_no_data_taskfile(drive, &cmd);
+
+	if (ret)
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+
+	return ret;
+}
+
+const struct ide_disk_ops ide_ata_disk_ops = {
+	.check			= ide_disk_check,
+	.unlock_native_capacity	= ide_disk_unlock_native_capacity,
+	.get_capacity		= ide_disk_get_capacity,
+	.setup			= ide_disk_setup,
+	.flush			= ide_disk_flush,
+	.init_media		= ide_disk_init_media,
+	.set_doorlock		= ide_disk_set_doorlock,
+	.do_request		= ide_do_rw_disk,
+	.ioctl			= ide_disk_ioctl,
+	.compat_ioctl		= ide_disk_ioctl,
+};
diff --git a/drivers/ide/ide-disk.h b/drivers/ide/ide-disk.h
new file mode 100644
index 000000000..0e8cc18bf
--- /dev/null
+++ b/drivers/ide/ide-disk.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __IDE_DISK_H
+#define __IDE_DISK_H
+
+#include "ide-gd.h"
+
+#ifdef CONFIG_IDE_GD_ATA
+/* ide-disk.c */
+extern const struct ide_disk_ops ide_ata_disk_ops;
+ide_decl_devset(address);
+ide_decl_devset(multcount);
+ide_decl_devset(nowerr);
+ide_decl_devset(wcache);
+ide_decl_devset(acoustic);
+
+/* ide-disk_ioctl.c */
+int ide_disk_ioctl(ide_drive_t *, struct block_device *, fmode_t, unsigned int,
+		   unsigned long);
+
+#ifdef CONFIG_IDE_PROC_FS
+/* ide-disk_proc.c */
+extern ide_proc_entry_t ide_disk_proc[];
+extern const struct ide_proc_devset ide_disk_settings[];
+#endif
+#else
+#define ide_disk_proc		NULL
+#define ide_disk_settings	NULL
+#endif
+
+#endif /* __IDE_DISK_H */
diff --git a/drivers/ide/ide-disk_ioctl.c b/drivers/ide/ide-disk_ioctl.c
new file mode 100644
index 000000000..2c45616cf
--- /dev/null
+++ b/drivers/ide/ide-disk_ioctl.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/hdreg.h>
+#include <linux/mutex.h>
+
+#include "ide-disk.h"
+
+static DEFINE_MUTEX(ide_disk_ioctl_mutex);
+static const struct ide_ioctl_devset ide_disk_ioctl_settings[] = {
+{ HDIO_GET_ADDRESS,	HDIO_SET_ADDRESS,   &ide_devset_address   },
+{ HDIO_GET_MULTCOUNT,	HDIO_SET_MULTCOUNT, &ide_devset_multcount },
+{ HDIO_GET_NOWERR,	HDIO_SET_NOWERR,    &ide_devset_nowerr	  },
+{ HDIO_GET_WCACHE,	HDIO_SET_WCACHE,    &ide_devset_wcache	  },
+{ HDIO_GET_ACOUSTIC,	HDIO_SET_ACOUSTIC,  &ide_devset_acoustic  },
+{ 0 }
+};
+
+int ide_disk_ioctl(ide_drive_t *drive, struct block_device *bdev, fmode_t mode,
+		   unsigned int cmd, unsigned long arg)
+{
+	int err;
+
+	mutex_lock(&ide_disk_ioctl_mutex);
+	err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_disk_ioctl_settings);
+	if (err != -EOPNOTSUPP)
+		goto out;
+
+	err = generic_ide_ioctl(drive, bdev, cmd, arg);
+out:
+	mutex_unlock(&ide_disk_ioctl_mutex);
+	return err;
+}
diff --git a/drivers/ide/ide-disk_proc.c b/drivers/ide/ide-disk_proc.c
new file mode 100644
index 000000000..95d239b2f
--- /dev/null
+++ b/drivers/ide/ide-disk_proc.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/seq_file.h>
+
+#include "ide-disk.h"
+
+static int smart_enable(ide_drive_t *drive)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+
+	memset(&cmd, 0, sizeof(cmd));
+	tf->feature = ATA_SMART_ENABLE;
+	tf->lbam    = ATA_SMART_LBAM_PASS;
+	tf->lbah    = ATA_SMART_LBAH_PASS;
+	tf->command = ATA_CMD_SMART;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+
+	memset(&cmd, 0, sizeof(cmd));
+	tf->feature = sub_cmd;
+	tf->nsect   = 0x01;
+	tf->lbam    = ATA_SMART_LBAM_PASS;
+	tf->lbah    = ATA_SMART_LBAH_PASS;
+	tf->command = ATA_CMD_SMART;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	cmd.protocol = ATA_PROT_PIO;
+
+	return ide_raw_taskfile(drive, &cmd, buf, 1);
+}
+
+static int idedisk_cache_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t	*drive = (ide_drive_t *) m->private;
+
+	if (drive->dev_flags & IDE_DFLAG_ID_READ)
+		seq_printf(m, "%i\n", drive->id[ATA_ID_BUF_SIZE] / 2);
+	else
+		seq_printf(m, "(none)\n");
+	return 0;
+}
+
+static int idedisk_capacity_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t*drive = (ide_drive_t *)m->private;
+
+	seq_printf(m, "%llu\n", (long long)ide_gd_capacity(drive));
+	return 0;
+}
+
+static int __idedisk_proc_show(struct seq_file *m, ide_drive_t *drive, u8 sub_cmd)
+{
+	u8 *buf;
+
+	buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	(void)smart_enable(drive);
+
+	if (get_smart_data(drive, buf, sub_cmd) == 0) {
+		__le16 *val = (__le16 *)buf;
+		int i;
+
+		for (i = 0; i < SECTOR_SIZE / 2; i++) {
+			seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
+					(i % 8) == 7 ? '\n' : ' ');
+		}
+	}
+	kfree(buf);
+	return 0;
+}
+
+static int idedisk_sv_proc_show(struct seq_file *m, void *v)
+{
+	return __idedisk_proc_show(m, m->private, ATA_SMART_READ_VALUES);
+}
+
+static int idedisk_st_proc_show(struct seq_file *m, void *v)
+{
+	return __idedisk_proc_show(m, m->private, ATA_SMART_READ_THRESHOLDS);
+}
+
+ide_proc_entry_t ide_disk_proc[] = {
+	{ "cache",	  S_IFREG|S_IRUGO, idedisk_cache_proc_show	},
+	{ "capacity",	  S_IFREG|S_IRUGO, idedisk_capacity_proc_show	},
+	{ "geometry",	  S_IFREG|S_IRUGO, ide_geometry_proc_show	},
+	{ "smart_values", S_IFREG|S_IRUSR, idedisk_sv_proc_show		},
+	{ "smart_thresholds", S_IFREG|S_IRUSR, idedisk_st_proc_show	},
+	{}
+};
+
+ide_devset_rw_field(bios_cyl, bios_cyl);
+ide_devset_rw_field(bios_head, bios_head);
+ide_devset_rw_field(bios_sect, bios_sect);
+ide_devset_rw_field(failures, failures);
+ide_devset_rw_field(lun, lun);
+ide_devset_rw_field(max_failures, max_failures);
+
+const struct ide_proc_devset ide_disk_settings[] = {
+	IDE_PROC_DEVSET(acoustic,	0,   254),
+	IDE_PROC_DEVSET(address,	0,     2),
+	IDE_PROC_DEVSET(bios_cyl,	0, 65535),
+	IDE_PROC_DEVSET(bios_head,	0,   255),
+	IDE_PROC_DEVSET(bios_sect,	0,    63),
+	IDE_PROC_DEVSET(failures,	0, 65535),
+	IDE_PROC_DEVSET(lun,		0,     7),
+	IDE_PROC_DEVSET(max_failures,	0, 65535),
+	IDE_PROC_DEVSET(multcount,	0,    16),
+	IDE_PROC_DEVSET(nowerr,		0,     1),
+	IDE_PROC_DEVSET(wcache,		0,     1),
+	{ NULL },
+};
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
new file mode 100644
index 000000000..b7c2c0bd1
--- /dev/null
+++ b/drivers/ide/ide-dma-sff.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+
+/**
+ *	config_drive_for_dma	-	attempt to activate IDE DMA
+ *	@drive: the drive to place in DMA mode
+ *
+ *	If the drive supports at least mode 2 DMA or UDMA of any kind
+ *	then attempt to place it into DMA mode. Drives that are known to
+ *	support DMA but predate the DMA properties or that are known
+ *	to have DMA handling bugs are also set up appropriately based
+ *	on the good/bad drive lists.
+ */
+
+int config_drive_for_dma(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u16 *id = drive->id;
+
+	if (drive->media != ide_disk) {
+		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
+			return 0;
+	}
+
+	/*
+	 * Enable DMA on any drive that has
+	 * UltraDMA (mode 0/1/2/3/4/5/6) enabled
+	 */
+	if ((id[ATA_ID_FIELD_VALID] & 4) &&
+	    ((id[ATA_ID_UDMA_MODES] >> 8) & 0x7f))
+		return 1;
+
+	/*
+	 * Enable DMA on any drive that has mode2 DMA
+	 * (multi or single) enabled
+	 */
+	if ((id[ATA_ID_MWDMA_MODES] & 0x404) == 0x404 ||
+	    (id[ATA_ID_SWDMA_MODES] & 0x404) == 0x404)
+		return 1;
+
+	/* Consult the list of known "good" drives */
+	if (ide_dma_good_drive(drive))
+		return 1;
+
+	return 0;
+}
+
+u8 ide_dma_sff_read_status(ide_hwif_t *hwif)
+{
+	unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		return readb((void __iomem *)addr);
+	else
+		return inb(addr);
+}
+EXPORT_SYMBOL_GPL(ide_dma_sff_read_status);
+
+static void ide_dma_sff_write_status(ide_hwif_t *hwif, u8 val)
+{
+	unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		writeb(val, (void __iomem *)addr);
+	else
+		outb(val, addr);
+}
+
+/**
+ *	ide_dma_host_set	-	Enable/disable DMA on a host
+ *	@drive: drive to control
+ *
+ *	Enable/disable DMA on an IDE controller following generic
+ *	bus-mastering IDE controller behaviour.
+ */
+
+void ide_dma_host_set(ide_drive_t *drive, int on)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 unit = drive->dn & 1;
+	u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+
+	if (on)
+		dma_stat |= (1 << (5 + unit));
+	else
+		dma_stat &= ~(1 << (5 + unit));
+
+	ide_dma_sff_write_status(hwif, dma_stat);
+}
+EXPORT_SYMBOL_GPL(ide_dma_host_set);
+
+/**
+ *	ide_build_dmatable	-	build IDE DMA table
+ *
+ *	ide_build_dmatable() prepares a dma request. We map the command
+ *	to get the pci bus addresses of the buffers and then build up
+ *	the PRD table that the IDE layer wants to be fed.
+ *
+ *	Most chipsets correctly interpret a length of 0x0000 as 64KB,
+ *	but at least one (e.g. CS5530) misinterprets it as zero (!).
+ *	So we break the 64KB entry into two 32KB entries instead.
+ *
+ *	Returns the number of built PRD entries if all went okay,
+ *	returns 0 otherwise.
+ *
+ *	May also be invoked from trm290.c
+ */
+
+int ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	__le32 *table = (__le32 *)hwif->dmatable_cpu;
+	unsigned int count = 0;
+	int i;
+	struct scatterlist *sg;
+	u8 is_trm290 = !!(hwif->host_flags & IDE_HFLAG_TRM290);
+
+	for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) {
+		u32 cur_addr, cur_len, xcount, bcount;
+
+		cur_addr = sg_dma_address(sg);
+		cur_len = sg_dma_len(sg);
+
+		/*
+		 * Fill in the dma table, without crossing any 64kB boundaries.
+		 * Most hardware requires 16-bit alignment of all blocks,
+		 * but the trm290 requires 32-bit alignment.
+		 */
+
+		while (cur_len) {
+			if (count++ >= PRD_ENTRIES)
+				goto use_pio_instead;
+
+			bcount = 0x10000 - (cur_addr & 0xffff);
+			if (bcount > cur_len)
+				bcount = cur_len;
+			*table++ = cpu_to_le32(cur_addr);
+			xcount = bcount & 0xffff;
+			if (is_trm290)
+				xcount = ((xcount >> 2) - 1) << 16;
+			else if (xcount == 0x0000) {
+				if (count++ >= PRD_ENTRIES)
+					goto use_pio_instead;
+				*table++ = cpu_to_le32(0x8000);
+				*table++ = cpu_to_le32(cur_addr + 0x8000);
+				xcount = 0x8000;
+			}
+			*table++ = cpu_to_le32(xcount);
+			cur_addr += bcount;
+			cur_len -= bcount;
+		}
+	}
+
+	if (count) {
+		if (!is_trm290)
+			*--table |= cpu_to_le32(0x80000000);
+		return count;
+	}
+
+use_pio_instead:
+	printk(KERN_ERR "%s: %s\n", drive->name,
+		count ? "DMA table too small" : "empty DMA table?");
+
+	return 0; /* revert to PIO for this request */
+}
+EXPORT_SYMBOL_GPL(ide_build_dmatable);
+
+/**
+ *	ide_dma_setup	-	begin a DMA phase
+ *	@drive: target device
+ *	@cmd: command
+ *
+ *	Build an IDE DMA PRD (IDE speak for scatter gather table)
+ *	and then set up the DMA transfer registers for a device
+ *	that follows generic IDE PCI DMA behaviour. Controllers can
+ *	override this function if they need to
+ *
+ *	Returns 0 on success. If a PIO fallback is required then 1
+ *	is returned.
+ */
+
+int ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+	u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
+	u8 dma_stat;
+
+	/* fall back to pio! */
+	if (ide_build_dmatable(drive, cmd) == 0) {
+		ide_map_sg(drive, cmd);
+		return 1;
+	}
+
+	/* PRD table */
+	if (mmio)
+		writel(hwif->dmatable_dma,
+		       (void __iomem *)(hwif->dma_base + ATA_DMA_TABLE_OFS));
+	else
+		outl(hwif->dmatable_dma, hwif->dma_base + ATA_DMA_TABLE_OFS);
+
+	/* specify r/w */
+	if (mmio)
+		writeb(rw, (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+	else
+		outb(rw, hwif->dma_base + ATA_DMA_CMD);
+
+	/* read DMA status for INTR & ERROR flags */
+	dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+
+	/* clear INTR & ERROR flags */
+	ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_dma_setup);
+
+/**
+ *	ide_dma_sff_timer_expiry	-	handle a DMA timeout
+ *	@drive: Drive that timed out
+ *
+ *	An IDE DMA transfer timed out. In the event of an error we ask
+ *	the driver to resolve the problem, if a DMA transfer is still
+ *	in progress we continue to wait (arguably we need to add a
+ *	secondary 'I don't care what the drive thinks' timeout here)
+ *	Finally if we have an interrupt we let it complete the I/O.
+ *	But only one time - we clear expiry and if it's still not
+ *	completed after WAIT_CMD, we error and retry in PIO.
+ *	This can occur if an interrupt is lost or due to hang or bugs.
+ */
+
+int ide_dma_sff_timer_expiry(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+
+	printk(KERN_WARNING "%s: %s: DMA status (0x%02x)\n",
+		drive->name, __func__, dma_stat);
+
+	if ((dma_stat & 0x18) == 0x18)	/* BUSY Stupid Early Timer !! */
+		return WAIT_CMD;
+
+	hwif->expiry = NULL;	/* one free ride for now */
+
+	if (dma_stat & ATA_DMA_ERR)	/* ERROR */
+		return -1;
+
+	if (dma_stat & ATA_DMA_ACTIVE)	/* DMAing */
+		return WAIT_CMD;
+
+	if (dma_stat & ATA_DMA_INTR)	/* Got an Interrupt */
+		return WAIT_CMD;
+
+	return 0;	/* Status is unknown -- reset the bus */
+}
+EXPORT_SYMBOL_GPL(ide_dma_sff_timer_expiry);
+
+void ide_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_cmd;
+
+	/* Note that this is done *after* the cmd has
+	 * been issued to the drive, as per the BM-IDE spec.
+	 * The Promise Ultra33 doesn't work correctly when
+	 * we do this part before issuing the drive cmd.
+	 */
+	if (hwif->host_flags & IDE_HFLAG_MMIO) {
+		dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+		writeb(dma_cmd | ATA_DMA_START,
+		       (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+	} else {
+		dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+		outb(dma_cmd | ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
+	}
+}
+EXPORT_SYMBOL_GPL(ide_dma_start);
+
+/* returns 1 on error, 0 otherwise */
+int ide_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = 0, dma_cmd = 0;
+
+	/* stop DMA */
+	if (hwif->host_flags & IDE_HFLAG_MMIO) {
+		dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+		writeb(dma_cmd & ~ATA_DMA_START,
+		       (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
+	} else {
+		dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+		outb(dma_cmd & ~ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
+	}
+
+	/* get DMA status */
+	dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+
+	/* clear INTR & ERROR bits */
+	ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
+
+#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
+
+	/* verify good DMA status */
+	if ((dma_stat & CHECK_DMA_MASK) != ATA_DMA_INTR)
+		return 0x10 | dma_stat;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_dma_end);
+
+/* returns 1 if dma irq issued, 0 otherwise */
+int ide_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+
+	return (dma_stat & ATA_DMA_INTR) ? 1 : 0;
+}
+EXPORT_SYMBOL_GPL(ide_dma_test_irq);
+
+const struct ide_dma_ops sff_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= ide_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+EXPORT_SYMBOL_GPL(sff_dma_ops);
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
new file mode 100644
index 000000000..6f344654e
--- /dev/null
+++ b/drivers/ide/ide-dma.c
@@ -0,0 +1,551 @@
+/*
+ *  IDE DMA support (including IDE PCI BM-DMA).
+ *
+ *  Copyright (C) 1995-1998   Mark Lord
+ *  Copyright (C) 1999-2000   Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2004, 2007  Bartlomiej Zolnierkiewicz
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies).
+ */
+
+/*
+ *  Special Thanks to Mark for his Six years of work.
+ */
+
+/*
+ * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for
+ * fixing the problem with the BIOS on some Acer motherboards.
+ *
+ * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing
+ * "TX" chipset compatibility and for providing patches for the "TX" chipset.
+ *
+ * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack
+ * at generic DMA -- his patches were referred to when preparing this code.
+ *
+ * Most importantly, thanks to Robert Bringman <rob@mars.trion.com>
+ * for supplying a Promise UDMA board & WD UDMA drive for this work!
+ */
+
+#include <linux/types.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+
+static const struct drive_list_entry drive_whitelist[] = {
+	{ "Micropolis 2112A"	,       NULL		},
+	{ "CONNER CTMA 4000"	,       NULL		},
+	{ "CONNER CTT8000-A"	,       NULL		},
+	{ "ST34342A"		,	NULL		},
+	{ NULL			,	NULL		}
+};
+
+static const struct drive_list_entry drive_blacklist[] = {
+	{ "WDC AC11000H"	,	NULL 		},
+	{ "WDC AC22100H"	,	NULL 		},
+	{ "WDC AC32500H"	,	NULL 		},
+	{ "WDC AC33100H"	,	NULL 		},
+	{ "WDC AC31600H"	,	NULL 		},
+	{ "WDC AC32100H"	,	"24.09P07"	},
+	{ "WDC AC23200L"	,	"21.10N21"	},
+	{ "Compaq CRD-8241B"	,	NULL 		},
+	{ "CRD-8400B"		,	NULL 		},
+	{ "CRD-8480B",			NULL 		},
+	{ "CRD-8482B",			NULL 		},
+	{ "CRD-84"		,	NULL 		},
+	{ "SanDisk SDP3B"	,	NULL 		},
+	{ "SanDisk SDP3B-64"	,	NULL 		},
+	{ "SANYO CD-ROM CRD"	,	NULL 		},
+	{ "HITACHI CDR-8"	,	NULL 		},
+	{ "HITACHI CDR-8335"	,	NULL 		},
+	{ "HITACHI CDR-8435"	,	NULL 		},
+	{ "Toshiba CD-ROM XM-6202B"	,	NULL 		},
+	{ "TOSHIBA CD-ROM XM-1702BC",	NULL 		},
+	{ "CD-532E-A"		,	NULL 		},
+	{ "E-IDE CD-ROM CR-840",	NULL 		},
+	{ "CD-ROM Drive/F5A",	NULL 		},
+	{ "WPI CDD-820",		NULL 		},
+	{ "SAMSUNG CD-ROM SC-148C",	NULL 		},
+	{ "SAMSUNG CD-ROM SC",	NULL 		},
+	{ "ATAPI CD-ROM DRIVE 40X MAXIMUM",	NULL 		},
+	{ "_NEC DV5800A",               NULL            },
+	{ "SAMSUNG CD-ROM SN-124",	"N001" },
+	{ "Seagate STT20000A",		NULL  },
+	{ "CD-ROM CDR_U200",		"1.09" },
+	{ NULL			,	NULL		}
+
+};
+
+/**
+ *	ide_dma_intr	-	IDE DMA interrupt handler
+ *	@drive: the drive the interrupt is for
+ *
+ *	Handle an interrupt completing a read/write DMA transfer on an
+ *	IDE device
+ */
+
+ide_startstop_t ide_dma_intr(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
+	u8 stat = 0, dma_stat = 0;
+
+	drive->waiting_for_dma = 0;
+	dma_stat = hwif->dma_ops->dma_end(drive);
+	ide_dma_unmap_sg(drive, cmd);
+	stat = hwif->tp_ops->read_status(hwif);
+
+	if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
+		if (!dma_stat) {
+			if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
+				ide_finish_cmd(drive, cmd, stat);
+			else
+				ide_complete_rq(drive, BLK_STS_OK,
+						blk_rq_sectors(cmd->rq) << 9);
+			return ide_stopped;
+		}
+		printk(KERN_ERR "%s: %s: bad DMA status (0x%02x)\n",
+			drive->name, __func__, dma_stat);
+	}
+	return ide_error(drive, "dma_intr", stat);
+}
+
+int ide_dma_good_drive(ide_drive_t *drive)
+{
+	return ide_in_drive_list(drive->id, drive_whitelist);
+}
+
+/**
+ *	ide_dma_map_sg	-	map IDE scatter gather for DMA I/O
+ *	@drive: the drive to map the DMA table for
+ *	@cmd: command
+ *
+ *	Perform the DMA mapping magic necessary to access the source or
+ *	target buffers of a request via DMA.  The lower layers of the
+ *	kernel provide the necessary cache management so that we can
+ *	operate in a portable fashion.
+ */
+
+static int ide_dma_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct scatterlist *sg = hwif->sg_table;
+	int i;
+
+	if (cmd->tf_flags & IDE_TFLAG_WRITE)
+		cmd->sg_dma_direction = DMA_TO_DEVICE;
+	else
+		cmd->sg_dma_direction = DMA_FROM_DEVICE;
+
+	i = dma_map_sg(hwif->dev, sg, cmd->sg_nents, cmd->sg_dma_direction);
+	if (i) {
+		cmd->orig_sg_nents = cmd->sg_nents;
+		cmd->sg_nents = i;
+	}
+
+	return i;
+}
+
+/**
+ *	ide_dma_unmap_sg	-	clean up DMA mapping
+ *	@drive: The drive to unmap
+ *
+ *	Teardown mappings after DMA has completed. This must be called
+ *	after the completion of each use of ide_build_dmatable and before
+ *	the next use of ide_build_dmatable. Failure to do so will cause
+ *	an oops as only one mapping can be live for each target at a given
+ *	time.
+ */
+
+void ide_dma_unmap_sg(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	dma_unmap_sg(hwif->dev, hwif->sg_table, cmd->orig_sg_nents,
+		     cmd->sg_dma_direction);
+}
+EXPORT_SYMBOL_GPL(ide_dma_unmap_sg);
+
+/**
+ *	ide_dma_off_quietly	-	Generic DMA kill
+ *	@drive: drive to control
+ *
+ *	Turn off the current DMA on this IDE controller.
+ */
+
+void ide_dma_off_quietly(ide_drive_t *drive)
+{
+	drive->dev_flags &= ~IDE_DFLAG_USING_DMA;
+
+	drive->hwif->dma_ops->dma_host_set(drive, 0);
+}
+EXPORT_SYMBOL(ide_dma_off_quietly);
+
+/**
+ *	ide_dma_off	-	disable DMA on a device
+ *	@drive: drive to disable DMA on
+ *
+ *	Disable IDE DMA for a device on this IDE controller.
+ *	Inform the user that DMA has been disabled.
+ */
+
+void ide_dma_off(ide_drive_t *drive)
+{
+	printk(KERN_INFO "%s: DMA disabled\n", drive->name);
+	ide_dma_off_quietly(drive);
+}
+EXPORT_SYMBOL(ide_dma_off);
+
+/**
+ *	ide_dma_on		-	Enable DMA on a device
+ *	@drive: drive to enable DMA on
+ *
+ *	Enable IDE DMA for a device on this IDE controller.
+ */
+
+void ide_dma_on(ide_drive_t *drive)
+{
+	drive->dev_flags |= IDE_DFLAG_USING_DMA;
+
+	drive->hwif->dma_ops->dma_host_set(drive, 1);
+}
+
+int __ide_dma_bad_drive(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+
+	int blacklist = ide_in_drive_list(id, drive_blacklist);
+	if (blacklist) {
+		printk(KERN_WARNING "%s: Disabling (U)DMA for %s (blacklisted)\n",
+				    drive->name, (char *)&id[ATA_ID_PROD]);
+		return blacklist;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(__ide_dma_bad_drive);
+
+static const u8 xfer_mode_bases[] = {
+	XFER_UDMA_0,
+	XFER_MW_DMA_0,
+	XFER_SW_DMA_0,
+};
+
+static unsigned int ide_get_mode_mask(ide_drive_t *drive, u8 base, u8 req_mode)
+{
+	u16 *id = drive->id;
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+	unsigned int mask = 0;
+
+	switch (base) {
+	case XFER_UDMA_0:
+		if ((id[ATA_ID_FIELD_VALID] & 4) == 0)
+			break;
+		mask = id[ATA_ID_UDMA_MODES];
+		if (port_ops && port_ops->udma_filter)
+			mask &= port_ops->udma_filter(drive);
+		else
+			mask &= hwif->ultra_mask;
+
+		/*
+		 * avoid false cable warning from eighty_ninty_three()
+		 */
+		if (req_mode > XFER_UDMA_2) {
+			if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
+				mask &= 0x07;
+		}
+		break;
+	case XFER_MW_DMA_0:
+		mask = id[ATA_ID_MWDMA_MODES];
+
+		/* Also look for the CF specific MWDMA modes... */
+		if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 0x38)) {
+			u8 mode = ((id[ATA_ID_CFA_MODES] & 0x38) >> 3) - 1;
+
+			mask |= ((2 << mode) - 1) << 3;
+		}
+
+		if (port_ops && port_ops->mdma_filter)
+			mask &= port_ops->mdma_filter(drive);
+		else
+			mask &= hwif->mwdma_mask;
+		break;
+	case XFER_SW_DMA_0:
+		mask = id[ATA_ID_SWDMA_MODES];
+		if (!(mask & ATA_SWDMA2) && (id[ATA_ID_OLD_DMA_MODES] >> 8)) {
+			u8 mode = id[ATA_ID_OLD_DMA_MODES] >> 8;
+
+			/*
+			 * if the mode is valid convert it to the mask
+			 * (the maximum allowed mode is XFER_SW_DMA_2)
+			 */
+			if (mode <= 2)
+				mask = (2 << mode) - 1;
+		}
+		mask &= hwif->swdma_mask;
+		break;
+	default:
+		BUG();
+		break;
+	}
+
+	return mask;
+}
+
+/**
+ *	ide_find_dma_mode	-	compute DMA speed
+ *	@drive: IDE device
+ *	@req_mode: requested mode
+ *
+ *	Checks the drive/host capabilities and finds the speed to use for
+ *	the DMA transfer.  The speed is then limited by the requested mode.
+ *
+ *	Returns 0 if the drive/host combination is incapable of DMA transfers
+ *	or if the requested mode is not a DMA mode.
+ */
+
+u8 ide_find_dma_mode(ide_drive_t *drive, u8 req_mode)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned int mask;
+	int x, i;
+	u8 mode = 0;
+
+	if (drive->media != ide_disk) {
+		if (hwif->host_flags & IDE_HFLAG_NO_ATAPI_DMA)
+			return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(xfer_mode_bases); i++) {
+		if (req_mode < xfer_mode_bases[i])
+			continue;
+		mask = ide_get_mode_mask(drive, xfer_mode_bases[i], req_mode);
+		x = fls(mask) - 1;
+		if (x >= 0) {
+			mode = xfer_mode_bases[i] + x;
+			break;
+		}
+	}
+
+	if (hwif->chipset == ide_acorn && mode == 0) {
+		/*
+		 * is this correct?
+		 */
+		if (ide_dma_good_drive(drive) &&
+		    drive->id[ATA_ID_EIDE_DMA_TIME] < 150)
+			mode = XFER_MW_DMA_1;
+	}
+
+	mode = min(mode, req_mode);
+
+	printk(KERN_INFO "%s: %s mode selected\n", drive->name,
+			  mode ? ide_xfer_verbose(mode) : "no DMA");
+
+	return mode;
+}
+
+static int ide_tune_dma(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 speed;
+
+	if (ata_id_has_dma(drive->id) == 0 ||
+	    (drive->dev_flags & IDE_DFLAG_NODMA))
+		return 0;
+
+	/* consult the list of known "bad" drives */
+	if (__ide_dma_bad_drive(drive))
+		return 0;
+
+	if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
+		return config_drive_for_dma(drive);
+
+	speed = ide_max_dma_mode(drive);
+
+	if (!speed)
+		return 0;
+
+	if (ide_set_dma_mode(drive, speed))
+		return 0;
+
+	return 1;
+}
+
+static int ide_dma_check(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	if (ide_tune_dma(drive))
+		return 0;
+
+	/* TODO: always do PIO fallback */
+	if (hwif->host_flags & IDE_HFLAG_TRUST_BIOS_FOR_DMA)
+		return -1;
+
+	ide_set_max_pio(drive);
+
+	return -1;
+}
+
+int ide_set_dma(ide_drive_t *drive)
+{
+	int rc;
+
+	/*
+	 * Force DMAing for the beginning of the check.
+	 * Some chipsets appear to do interesting
+	 * things, if not checked and cleared.
+	 *   PARANOIA!!!
+	 */
+	ide_dma_off_quietly(drive);
+
+	rc = ide_dma_check(drive);
+	if (rc)
+		return rc;
+
+	ide_dma_on(drive);
+
+	return 0;
+}
+
+void ide_check_dma_crc(ide_drive_t *drive)
+{
+	u8 mode;
+
+	ide_dma_off_quietly(drive);
+	drive->crc_count = 0;
+	mode = drive->current_speed;
+	/*
+	 * Don't try non Ultra-DMA modes without iCRC's.  Force the
+	 * device to PIO and make the user enable SWDMA/MWDMA modes.
+	 */
+	if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
+		mode--;
+	else
+		mode = XFER_PIO_4;
+	ide_set_xfer_rate(drive, mode);
+	if (drive->current_speed >= XFER_SW_DMA_0)
+		ide_dma_on(drive);
+}
+
+void ide_dma_lost_irq(ide_drive_t *drive)
+{
+	printk(KERN_ERR "%s: DMA interrupt recovery\n", drive->name);
+}
+EXPORT_SYMBOL_GPL(ide_dma_lost_irq);
+
+/*
+ * un-busy the port etc, and clear any pending DMA status. we want to
+ * retry the current request in pio mode instead of risking tossing it
+ * all away
+ */
+ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_dma_ops *dma_ops = hwif->dma_ops;
+	struct ide_cmd *cmd = &hwif->cmd;
+	ide_startstop_t ret = ide_stopped;
+
+	/*
+	 * end current dma transaction
+	 */
+
+	if (error < 0) {
+		printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
+		drive->waiting_for_dma = 0;
+		(void)dma_ops->dma_end(drive);
+		ide_dma_unmap_sg(drive, cmd);
+		ret = ide_error(drive, "dma timeout error",
+				hwif->tp_ops->read_status(hwif));
+	} else {
+		printk(KERN_WARNING "%s: DMA timeout retry\n", drive->name);
+		if (dma_ops->dma_clear)
+			dma_ops->dma_clear(drive);
+		printk(KERN_ERR "%s: timeout waiting for DMA\n", drive->name);
+		if (dma_ops->dma_test_irq(drive) == 0) {
+			ide_dump_status(drive, "DMA timeout",
+					hwif->tp_ops->read_status(hwif));
+			drive->waiting_for_dma = 0;
+			(void)dma_ops->dma_end(drive);
+			ide_dma_unmap_sg(drive, cmd);
+		}
+	}
+
+	/*
+	 * disable dma for now, but remember that we did so because of
+	 * a timeout -- we'll reenable after we finish this next request
+	 * (or rather the first chunk of it) in pio.
+	 */
+	drive->dev_flags |= IDE_DFLAG_DMA_PIO_RETRY;
+	drive->retry_pio++;
+	ide_dma_off_quietly(drive);
+
+	/*
+	 * make sure request is sane
+	 */
+	if (hwif->rq)
+		scsi_req(hwif->rq)->result = 0;
+	return ret;
+}
+
+void ide_release_dma_engine(ide_hwif_t *hwif)
+{
+	if (hwif->dmatable_cpu) {
+		int prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
+
+		dma_free_coherent(hwif->dev, prd_size,
+				  hwif->dmatable_cpu, hwif->dmatable_dma);
+		hwif->dmatable_cpu = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(ide_release_dma_engine);
+
+int ide_allocate_dma_engine(ide_hwif_t *hwif)
+{
+	int prd_size;
+
+	if (hwif->prd_max_nents == 0)
+		hwif->prd_max_nents = PRD_ENTRIES;
+	if (hwif->prd_ent_size == 0)
+		hwif->prd_ent_size = PRD_BYTES;
+
+	prd_size = hwif->prd_max_nents * hwif->prd_ent_size;
+
+	hwif->dmatable_cpu = dma_alloc_coherent(hwif->dev, prd_size,
+						&hwif->dmatable_dma,
+						GFP_ATOMIC);
+	if (hwif->dmatable_cpu == NULL) {
+		printk(KERN_ERR "%s: unable to allocate PRD table\n",
+			hwif->name);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_allocate_dma_engine);
+
+int ide_dma_prepare(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	const struct ide_dma_ops *dma_ops = drive->hwif->dma_ops;
+
+	if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
+	    (dma_ops->dma_check && dma_ops->dma_check(drive, cmd)))
+		goto out;
+	ide_map_sg(drive, cmd);
+	if (ide_dma_map_sg(drive, cmd) == 0)
+		goto out_map;
+	if (dma_ops->dma_setup(drive, cmd))
+		goto out_dma_unmap;
+	drive->waiting_for_dma = 1;
+	return 0;
+out_dma_unmap:
+	ide_dma_unmap_sg(drive, cmd);
+out_map:
+	ide_map_sg(drive, cmd);
+out:
+	return 1;
+}
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
new file mode 100644
index 000000000..2f378213e
--- /dev/null
+++ b/drivers/ide/ide-eh.c
@@ -0,0 +1,443 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+#include <linux/delay.h>
+
+static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq,
+				     u8 stat, u8 err)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	if ((stat & ATA_BUSY) ||
+	    ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
+		/* other bits are useless when BUSY */
+		scsi_req(rq)->result |= ERROR_RESET;
+	} else if (stat & ATA_ERR) {
+		/* err has different meaning on cdrom and tape */
+		if (err == ATA_ABORTED) {
+			if ((drive->dev_flags & IDE_DFLAG_LBA) &&
+			    /* some newer drives don't support ATA_CMD_INIT_DEV_PARAMS */
+			    hwif->tp_ops->read_status(hwif) == ATA_CMD_INIT_DEV_PARAMS)
+				return ide_stopped;
+		} else if ((err & BAD_CRC) == BAD_CRC) {
+			/* UDMA crc error, just retry the operation */
+			drive->crc_count++;
+		} else if (err & (ATA_BBK | ATA_UNC)) {
+			/* retries won't help these */
+			scsi_req(rq)->result = ERROR_MAX;
+		} else if (err & ATA_TRK0NF) {
+			/* help it find track zero */
+			scsi_req(rq)->result |= ERROR_RECAL;
+		}
+	}
+
+	if ((stat & ATA_DRQ) && rq_data_dir(rq) == READ &&
+	    (hwif->host_flags & IDE_HFLAG_ERROR_STOPS_FIFO) == 0) {
+		int nsect = drive->mult_count ? drive->mult_count : 1;
+
+		ide_pad_transfer(drive, READ, nsect * SECTOR_SIZE);
+	}
+
+	if (scsi_req(rq)->result >= ERROR_MAX || blk_noretry_request(rq)) {
+		ide_kill_rq(drive, rq);
+		return ide_stopped;
+	}
+
+	if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
+		scsi_req(rq)->result |= ERROR_RESET;
+
+	if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+		++scsi_req(rq)->result;
+		return ide_do_reset(drive);
+	}
+
+	if ((scsi_req(rq)->result & ERROR_RECAL) == ERROR_RECAL)
+		drive->special_flags |= IDE_SFLAG_RECALIBRATE;
+
+	++scsi_req(rq)->result;
+
+	return ide_stopped;
+}
+
+static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq,
+				       u8 stat, u8 err)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	if ((stat & ATA_BUSY) ||
+	    ((stat & ATA_DF) && (drive->dev_flags & IDE_DFLAG_NOWERR) == 0)) {
+		/* other bits are useless when BUSY */
+		scsi_req(rq)->result |= ERROR_RESET;
+	} else {
+		/* add decoding error stuff */
+	}
+
+	if (hwif->tp_ops->read_status(hwif) & (ATA_BUSY | ATA_DRQ))
+		/* force an abort */
+		hwif->tp_ops->exec_command(hwif, ATA_CMD_IDLEIMMEDIATE);
+
+	if (scsi_req(rq)->result >= ERROR_MAX) {
+		ide_kill_rq(drive, rq);
+	} else {
+		if ((scsi_req(rq)->result & ERROR_RESET) == ERROR_RESET) {
+			++scsi_req(rq)->result;
+			return ide_do_reset(drive);
+		}
+		++scsi_req(rq)->result;
+	}
+
+	return ide_stopped;
+}
+
+static ide_startstop_t __ide_error(ide_drive_t *drive, struct request *rq,
+				   u8 stat, u8 err)
+{
+	if (drive->media == ide_disk)
+		return ide_ata_error(drive, rq, stat, err);
+	return ide_atapi_error(drive, rq, stat, err);
+}
+
+/**
+ *	ide_error	-	handle an error on the IDE
+ *	@drive: drive the error occurred on
+ *	@msg: message to report
+ *	@stat: status bits
+ *
+ *	ide_error() takes action based on the error returned by the drive.
+ *	For normal I/O that may well include retries. We deal with
+ *	both new-style (taskfile) and old style command handling here.
+ *	In the case of taskfile command handling there is work left to
+ *	do
+ */
+
+ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
+{
+	struct request *rq;
+	u8 err;
+
+	err = ide_dump_status(drive, msg, stat);
+
+	rq = drive->hwif->rq;
+	if (rq == NULL)
+		return ide_stopped;
+
+	/* retry only "normal" I/O: */
+	if (blk_rq_is_passthrough(rq)) {
+		if (ata_taskfile_request(rq)) {
+			struct ide_cmd *cmd = ide_req(rq)->special;
+
+			if (cmd)
+				ide_complete_cmd(drive, cmd, stat, err);
+		} else if (ata_pm_request(rq)) {
+			scsi_req(rq)->result = 1;
+			ide_complete_pm_rq(drive, rq);
+			return ide_stopped;
+		}
+		scsi_req(rq)->result = err;
+		ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
+		return ide_stopped;
+	}
+
+	return __ide_error(drive, rq, stat, err);
+}
+EXPORT_SYMBOL_GPL(ide_error);
+
+static inline void ide_complete_drive_reset(ide_drive_t *drive, blk_status_t err)
+{
+	struct request *rq = drive->hwif->rq;
+
+	if (rq && ata_misc_request(rq) &&
+	    scsi_req(rq)->cmd[0] == REQ_DRIVE_RESET) {
+		if (err <= 0 && scsi_req(rq)->result == 0)
+			scsi_req(rq)->result = -EIO;
+		ide_complete_rq(drive, err, blk_rq_bytes(rq));
+	}
+}
+
+/* needed below */
+static ide_startstop_t do_reset1(ide_drive_t *, int);
+
+/*
+ * atapi_reset_pollfunc() gets invoked to poll the interface for completion
+ * every 50ms during an atapi drive reset operation.  If the drive has not yet
+ * responded, and we have not yet hit our maximum waiting time, then the timer
+ * is restarted for another 50ms.
+ */
+static ide_startstop_t atapi_reset_pollfunc(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	u8 stat;
+
+	tp_ops->dev_select(drive);
+	udelay(10);
+	stat = tp_ops->read_status(hwif);
+
+	if (OK_STAT(stat, 0, ATA_BUSY))
+		printk(KERN_INFO "%s: ATAPI reset complete\n", drive->name);
+	else {
+		if (time_before(jiffies, hwif->poll_timeout)) {
+			ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20);
+			/* continue polling */
+			return ide_started;
+		}
+		/* end of polling */
+		hwif->polling = 0;
+		printk(KERN_ERR "%s: ATAPI reset timed-out, status=0x%02x\n",
+			drive->name, stat);
+		/* do it the old fashioned way */
+		return do_reset1(drive, 1);
+	}
+	/* done polling */
+	hwif->polling = 0;
+	ide_complete_drive_reset(drive, BLK_STS_OK);
+	return ide_stopped;
+}
+
+static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
+{
+	static const char *err_master_vals[] =
+		{ NULL, "passed", "formatter device error",
+		  "sector buffer error", "ECC circuitry error",
+		  "controlling MPU error" };
+
+	u8 err_master = err & 0x7f;
+
+	printk(KERN_ERR "%s: reset: master: ", hwif->name);
+	if (err_master && err_master < 6)
+		printk(KERN_CONT "%s", err_master_vals[err_master]);
+	else
+		printk(KERN_CONT "error (0x%02x?)", err);
+	if (err & 0x80)
+		printk(KERN_CONT "; slave: failed");
+	printk(KERN_CONT "\n");
+}
+
+/*
+ * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
+ * during an ide reset operation. If the drives have not yet responded,
+ * and we have not yet hit our maximum waiting time, then the timer is restarted
+ * for another 50ms.
+ */
+static ide_startstop_t reset_pollfunc(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+	u8 tmp;
+	blk_status_t err = BLK_STS_OK;
+
+	if (port_ops && port_ops->reset_poll) {
+		err = port_ops->reset_poll(drive);
+		if (err) {
+			printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
+				hwif->name, drive->name);
+			goto out;
+		}
+	}
+
+	tmp = hwif->tp_ops->read_status(hwif);
+
+	if (!OK_STAT(tmp, 0, ATA_BUSY)) {
+		if (time_before(jiffies, hwif->poll_timeout)) {
+			ide_set_handler(drive, &reset_pollfunc, HZ/20);
+			/* continue polling */
+			return ide_started;
+		}
+		printk(KERN_ERR "%s: reset timed-out, status=0x%02x\n",
+			hwif->name, tmp);
+		drive->failures++;
+		err = BLK_STS_IOERR;
+	} else  {
+		tmp = ide_read_error(drive);
+
+		if (tmp == 1) {
+			printk(KERN_INFO "%s: reset: success\n", hwif->name);
+			drive->failures = 0;
+		} else {
+			ide_reset_report_error(hwif, tmp);
+			drive->failures++;
+			err = BLK_STS_IOERR;
+		}
+	}
+out:
+	hwif->polling = 0;	/* done polling */
+	ide_complete_drive_reset(drive, err);
+	return ide_stopped;
+}
+
+static void ide_disk_pre_reset(ide_drive_t *drive)
+{
+	int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
+
+	drive->special_flags =
+		legacy ? (IDE_SFLAG_SET_GEOMETRY | IDE_SFLAG_RECALIBRATE) : 0;
+
+	drive->mult_count = 0;
+	drive->dev_flags &= ~IDE_DFLAG_PARKED;
+
+	if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
+	    (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
+		drive->mult_req = 0;
+
+	if (drive->mult_req != drive->mult_count)
+		drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
+}
+
+static void pre_reset(ide_drive_t *drive)
+{
+	const struct ide_port_ops *port_ops = drive->hwif->port_ops;
+
+	if (drive->media == ide_disk)
+		ide_disk_pre_reset(drive);
+	else
+		drive->dev_flags |= IDE_DFLAG_POST_RESET;
+
+	if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
+		if (drive->crc_count)
+			ide_check_dma_crc(drive);
+		else
+			ide_dma_off(drive);
+	}
+
+	if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
+		if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
+			drive->dev_flags &= ~IDE_DFLAG_UNMASK;
+			drive->io_32bit = 0;
+		}
+		return;
+	}
+
+	if (port_ops && port_ops->pre_reset)
+		port_ops->pre_reset(drive);
+
+	if (drive->current_speed != 0xff)
+		drive->desired_speed = drive->current_speed;
+	drive->current_speed = 0xff;
+}
+
+/*
+ * do_reset1() attempts to recover a confused drive by resetting it.
+ * Unfortunately, resetting a disk drive actually resets all devices on
+ * the same interface, so it can really be thought of as resetting the
+ * interface rather than resetting the drive.
+ *
+ * ATAPI devices have their own reset mechanism which allows them to be
+ * individually reset without clobbering other devices on the same interface.
+ *
+ * Unfortunately, the IDE interface does not generate an interrupt to let
+ * us know when the reset operation has finished, so we must poll for this.
+ * Equally poor, though, is the fact that this may a very long time to complete,
+ * (up to 30 seconds worstcase).  So, instead of busy-waiting here for it,
+ * we set a timer to poll at 50ms intervals.
+ */
+static ide_startstop_t do_reset1(ide_drive_t *drive, int do_not_try_atapi)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	const struct ide_port_ops *port_ops;
+	ide_drive_t *tdrive;
+	unsigned long flags, timeout;
+	int i;
+	DEFINE_WAIT(wait);
+
+	spin_lock_irqsave(&hwif->lock, flags);
+
+	/* We must not reset with running handlers */
+	BUG_ON(hwif->handler != NULL);
+
+	/* For an ATAPI device, first try an ATAPI SRST. */
+	if (drive->media != ide_disk && !do_not_try_atapi) {
+		pre_reset(drive);
+		tp_ops->dev_select(drive);
+		udelay(20);
+		tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
+		ndelay(400);
+		hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
+		hwif->polling = 1;
+		__ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20);
+		spin_unlock_irqrestore(&hwif->lock, flags);
+		return ide_started;
+	}
+
+	/* We must not disturb devices in the IDE_DFLAG_PARKED state. */
+	do {
+		unsigned long now;
+
+		prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
+		timeout = jiffies;
+		ide_port_for_each_present_dev(i, tdrive, hwif) {
+			if ((tdrive->dev_flags & IDE_DFLAG_PARKED) &&
+			    time_after(tdrive->sleep, timeout))
+				timeout = tdrive->sleep;
+		}
+
+		now = jiffies;
+		if (time_before_eq(timeout, now))
+			break;
+
+		spin_unlock_irqrestore(&hwif->lock, flags);
+		timeout = schedule_timeout_uninterruptible(timeout - now);
+		spin_lock_irqsave(&hwif->lock, flags);
+	} while (timeout);
+	finish_wait(&ide_park_wq, &wait);
+
+	/*
+	 * First, reset any device state data we were maintaining
+	 * for any of the drives on this interface.
+	 */
+	ide_port_for_each_dev(i, tdrive, hwif)
+		pre_reset(tdrive);
+
+	if (io_ports->ctl_addr == 0) {
+		spin_unlock_irqrestore(&hwif->lock, flags);
+		ide_complete_drive_reset(drive, BLK_STS_IOERR);
+		return ide_stopped;
+	}
+
+	/*
+	 * Note that we also set nIEN while resetting the device,
+	 * to mask unwanted interrupts from the interface during the reset.
+	 * However, due to the design of PC hardware, this will cause an
+	 * immediate interrupt due to the edge transition it produces.
+	 * This single interrupt gives us a "fast poll" for drives that
+	 * recover from reset very quickly, saving us the first 50ms wait time.
+	 */
+	/* set SRST and nIEN */
+	tp_ops->write_devctl(hwif, ATA_SRST | ATA_NIEN | ATA_DEVCTL_OBS);
+	/* more than enough time */
+	udelay(10);
+	/* clear SRST, leave nIEN (unless device is on the quirk list) */
+	tp_ops->write_devctl(hwif,
+		((drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) ? 0 : ATA_NIEN) |
+		 ATA_DEVCTL_OBS);
+	/* more than enough time */
+	udelay(10);
+	hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
+	hwif->polling = 1;
+	__ide_set_handler(drive, &reset_pollfunc, HZ/20);
+
+	/*
+	 * Some weird controller like resetting themselves to a strange
+	 * state when the disks are reset this way. At least, the Winbond
+	 * 553 documentation says that
+	 */
+	port_ops = hwif->port_ops;
+	if (port_ops && port_ops->resetproc)
+		port_ops->resetproc(drive);
+
+	spin_unlock_irqrestore(&hwif->lock, flags);
+	return ide_started;
+}
+
+/*
+ * ide_do_reset() is the entry point to the drive/interface reset code.
+ */
+
+ide_startstop_t ide_do_reset(ide_drive_t *drive)
+{
+	return do_reset1(drive, 0);
+}
+EXPORT_SYMBOL(ide_do_reset);
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
new file mode 100644
index 000000000..f5a2870aa
--- /dev/null
+++ b/drivers/ide/ide-floppy.c
@@ -0,0 +1,551 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * IDE ATAPI floppy driver.
+ *
+ * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
+ * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
+ * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
+ *
+ * This driver supports the following IDE floppy drives:
+ *
+ * LS-120/240 SuperDisk
+ * Iomega Zip 100/250
+ * Iomega PC Card Clik!/PocketZip
+ *
+ * For a historical changelog see
+ * Documentation/ide/ChangeLog.ide-floppy.1996-2002
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/compat.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/cdrom.h>
+#include <linux/ide.h>
+#include <linux/hdreg.h>
+#include <linux/bitops.h>
+#include <linux/mutex.h>
+#include <linux/scatterlist.h>
+
+#include <scsi/scsi_ioctl.h>
+
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <asm/unaligned.h>
+
+#include "ide-floppy.h"
+
+/*
+ * After each failed packet command we issue a request sense command and retry
+ * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
+ */
+#define IDEFLOPPY_MAX_PC_RETRIES	3
+
+/* format capacities descriptor codes */
+#define CAPACITY_INVALID	0x00
+#define CAPACITY_UNFORMATTED	0x01
+#define CAPACITY_CURRENT	0x02
+#define CAPACITY_NO_CARTRIDGE	0x03
+
+/*
+ * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
+ * was apparently being deasserted before the unit was ready to receive data.
+ */
+#define IDEFLOPPY_PC_DELAY	(HZ/20)	/* default delay for ZIP 100 (50ms) */
+
+static int ide_floppy_callback(ide_drive_t *drive, int dsc)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	struct ide_atapi_pc *pc = drive->pc;
+	struct request *rq = pc->rq;
+	int uptodate = pc->error ? 0 : 1;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (drive->failed_pc == pc)
+		drive->failed_pc = NULL;
+
+	if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
+	    blk_rq_is_scsi(rq))
+		uptodate = 1; /* FIXME */
+	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
+
+		u8 *buf = bio_data(rq->bio);
+
+		if (!pc->error) {
+			floppy->sense_key = buf[2] & 0x0F;
+			floppy->asc = buf[12];
+			floppy->ascq = buf[13];
+			floppy->progress_indication = buf[15] & 0x80 ?
+				(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
+
+			if (drive->failed_pc)
+				ide_debug_log(IDE_DBG_PC, "pc = %x",
+					      drive->failed_pc->c[0]);
+
+			ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
+				      "ascq = %x", floppy->sense_key,
+				      floppy->asc, floppy->ascq);
+		} else
+			printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
+			       "Aborting request!\n");
+	}
+
+	if (ata_misc_request(rq))
+		scsi_req(rq)->result = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+
+	return uptodate;
+}
+
+static void ide_floppy_report_error(struct ide_disk_obj *floppy,
+				    struct ide_atapi_pc *pc)
+{
+	/* suppress error messages resulting from Medium not present */
+	if (floppy->sense_key == 0x02 &&
+	    floppy->asc       == 0x3a &&
+	    floppy->ascq      == 0x00)
+		return;
+
+	printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
+			"asc = %2x, ascq = %2x\n",
+			floppy->drive->name, pc->c[0], floppy->sense_key,
+			floppy->asc, floppy->ascq);
+
+}
+
+static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
+					   struct ide_cmd *cmd,
+					   struct ide_atapi_pc *pc)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+
+	if (drive->failed_pc == NULL &&
+	    pc->c[0] != GPCMD_REQUEST_SENSE)
+		drive->failed_pc = pc;
+
+	/* Set the current packet command */
+	drive->pc = pc;
+
+	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
+		unsigned int done = blk_rq_bytes(drive->hwif->rq);
+
+		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
+			ide_floppy_report_error(floppy, pc);
+
+		/* Giving up */
+		pc->error = IDE_DRV_ERROR_GENERAL;
+
+		drive->failed_pc = NULL;
+		drive->pc_callback(drive, 0);
+		ide_complete_rq(drive, BLK_STS_IOERR, done);
+		return ide_stopped;
+	}
+
+	ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);
+
+	pc->retries++;
+
+	return ide_issue_pc(drive, cmd);
+}
+
+void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
+{
+	ide_init_pc(pc);
+	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
+	pc->c[7] = 255;
+	pc->c[8] = 255;
+	pc->req_xfer = 255;
+}
+
+/* A mode sense command is used to "sense" floppy parameters. */
+void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
+{
+	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
+
+	ide_init_pc(pc);
+	pc->c[0] = GPCMD_MODE_SENSE_10;
+	pc->c[1] = 0;
+	pc->c[2] = page_code;
+
+	switch (page_code) {
+	case IDEFLOPPY_CAPABILITIES_PAGE:
+		length += 12;
+		break;
+	case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
+		length += 32;
+		break;
+	default:
+		printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
+	}
+	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
+	pc->req_xfer = length;
+}
+
+static void idefloppy_create_rw_cmd(ide_drive_t *drive,
+				    struct ide_atapi_pc *pc, struct request *rq,
+				    unsigned long sector)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	int block = sector / floppy->bs_factor;
+	int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
+	int cmd = rq_data_dir(rq);
+
+	ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
+
+	ide_init_pc(pc);
+	pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
+	put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
+	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
+
+	memcpy(scsi_req(rq)->cmd, pc->c, 12);
+
+	pc->rq = rq;
+	if (cmd == WRITE)
+		pc->flags |= PC_FLAG_WRITING;
+
+	pc->flags |= PC_FLAG_DMA_OK;
+}
+
+static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
+		struct ide_atapi_pc *pc, struct request *rq)
+{
+	ide_init_pc(pc);
+	memcpy(pc->c, scsi_req(rq)->cmd, sizeof(pc->c));
+	pc->rq = rq;
+	if (blk_rq_bytes(rq)) {
+		pc->flags |= PC_FLAG_DMA_OK;
+		if (rq_data_dir(rq) == WRITE)
+			pc->flags |= PC_FLAG_WRITING;
+	}
+}
+
+static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
+					     struct request *rq, sector_t block)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	struct ide_cmd cmd;
+	struct ide_atapi_pc *pc;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
+
+	if (drive->debug_mask & IDE_DBG_RQ)
+		blk_dump_rq_flags(rq, (rq->rq_disk
+					? rq->rq_disk->disk_name
+					: "dev?"));
+
+	if (scsi_req(rq)->result >= ERROR_MAX) {
+		if (drive->failed_pc) {
+			ide_floppy_report_error(floppy, drive->failed_pc);
+			drive->failed_pc = NULL;
+		} else
+			printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
+
+		if (ata_misc_request(rq)) {
+			scsi_req(rq)->result = 0;
+			ide_complete_rq(drive, BLK_STS_OK, blk_rq_bytes(rq));
+			return ide_stopped;
+		} else
+			goto out_end;
+	}
+
+	switch (req_op(rq)) {
+	default:
+		if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
+		    (blk_rq_sectors(rq) % floppy->bs_factor)) {
+			printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
+				drive->name);
+			goto out_end;
+		}
+		pc = &floppy->queued_pc;
+		idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
+		break;
+	case REQ_OP_SCSI_IN:
+	case REQ_OP_SCSI_OUT:
+		pc = &floppy->queued_pc;
+		idefloppy_blockpc_cmd(floppy, pc, rq);
+		break;
+	case REQ_OP_DRV_IN:
+	case REQ_OP_DRV_OUT:
+		switch (ide_req(rq)->type) {
+		case ATA_PRIV_MISC:
+		case ATA_PRIV_SENSE:
+			pc = (struct ide_atapi_pc *)ide_req(rq)->special;
+			break;
+		default:
+			BUG();
+		}
+	}
+
+	ide_prep_sense(drive, rq);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	if (rq_data_dir(rq))
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+	cmd.rq = rq;
+
+	if (!blk_rq_is_passthrough(rq) || blk_rq_bytes(rq)) {
+		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
+		ide_map_sg(drive, &cmd);
+	}
+
+	pc->rq = rq;
+
+	return ide_floppy_issue_pc(drive, &cmd, pc);
+out_end:
+	drive->failed_pc = NULL;
+	if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+		scsi_req(rq)->result = -EIO;
+	ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(rq));
+	return ide_stopped;
+}
+
+/*
+ * Look at the flexible disk page parameters. We ignore the CHS capacity
+ * parameters and use the LBA parameters instead.
+ */
+static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
+					     struct ide_atapi_pc *pc)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	struct gendisk *disk = floppy->disk;
+	u8 *page, buf[40];
+	int capacity, lba_capacity;
+	u16 transfer_rate, sector_size, cyls, rpm;
+	u8 heads, sectors;
+
+	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
+
+	if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
+		printk(KERN_ERR PFX "Can't get flexible disk page params\n");
+		return 1;
+	}
+
+	if (buf[3] & 0x80)
+		drive->dev_flags |= IDE_DFLAG_WP;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_WP;
+
+	set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
+
+	page = &buf[8];
+
+	transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
+	sector_size   = be16_to_cpup((__be16 *)&buf[8 + 6]);
+	cyls          = be16_to_cpup((__be16 *)&buf[8 + 8]);
+	rpm           = be16_to_cpup((__be16 *)&buf[8 + 28]);
+	heads         = buf[8 + 4];
+	sectors       = buf[8 + 5];
+
+	capacity = cyls * heads * sectors * sector_size;
+
+	if (memcmp(page, &floppy->flexible_disk_page, 32))
+		printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
+				"%d sector size, %d rpm\n",
+				drive->name, capacity / 1024, cyls, heads,
+				sectors, transfer_rate / 8, sector_size, rpm);
+
+	memcpy(&floppy->flexible_disk_page, page, 32);
+	drive->bios_cyl = cyls;
+	drive->bios_head = heads;
+	drive->bios_sect = sectors;
+	lba_capacity = floppy->blocks * floppy->block_size;
+
+	if (capacity < lba_capacity) {
+		printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
+			"bytes, but the drive only handles %d\n",
+			drive->name, lba_capacity, capacity);
+		floppy->blocks = floppy->block_size ?
+			capacity / floppy->block_size : 0;
+		drive->capacity64 = floppy->blocks * floppy->bs_factor;
+	}
+
+	return 0;
+}
+
+/*
+ * Determine if a media is present in the floppy drive, and if so, its LBA
+ * capacity.
+ */
+static int ide_floppy_get_capacity(ide_drive_t *drive)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	struct gendisk *disk = floppy->disk;
+	struct ide_atapi_pc pc;
+	u8 *cap_desc;
+	u8 pc_buf[256], header_len, desc_cnt;
+	int i, rc = 1, blocks, length;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	drive->bios_cyl = 0;
+	drive->bios_head = drive->bios_sect = 0;
+	floppy->blocks = 0;
+	floppy->bs_factor = 1;
+	drive->capacity64 = 0;
+
+	ide_floppy_create_read_capacity_cmd(&pc);
+	if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
+		printk(KERN_ERR PFX "Can't get floppy parameters\n");
+		return 1;
+	}
+	header_len = pc_buf[3];
+	cap_desc = &pc_buf[4];
+	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
+
+	for (i = 0; i < desc_cnt; i++) {
+		unsigned int desc_start = 4 + i*8;
+
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
+
+		ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
+					     "%d sector size",
+					     i, blocks * length / 1024,
+					     blocks, length);
+
+		if (i)
+			continue;
+		/*
+		 * the code below is valid only for the 1st descriptor, ie i=0
+		 */
+
+		switch (pc_buf[desc_start + 4] & 0x03) {
+		/* Clik! drive returns this instead of CAPACITY_CURRENT */
+		case CAPACITY_UNFORMATTED:
+			if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
+				/*
+				 * If it is not a clik drive, break out
+				 * (maintains previous driver behaviour)
+				 */
+				break;
+			fallthrough;
+		case CAPACITY_CURRENT:
+			/* Normal Zip/LS-120 disks */
+			if (memcmp(cap_desc, &floppy->cap_desc, 8))
+				printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
+				       "sector size\n",
+				       drive->name, blocks * length / 1024,
+				       blocks, length);
+			memcpy(&floppy->cap_desc, cap_desc, 8);
+
+			if (!length || length % 512) {
+				printk(KERN_NOTICE PFX "%s: %d bytes block size"
+				       " not supported\n", drive->name, length);
+			} else {
+				floppy->blocks = blocks;
+				floppy->block_size = length;
+				floppy->bs_factor = length / 512;
+				if (floppy->bs_factor != 1)
+					printk(KERN_NOTICE PFX "%s: Warning: "
+					       "non 512 bytes block size not "
+					       "fully supported\n",
+					       drive->name);
+				drive->capacity64 =
+					floppy->blocks * floppy->bs_factor;
+				rc = 0;
+			}
+			break;
+		case CAPACITY_NO_CARTRIDGE:
+			/*
+			 * This is a KERN_ERR so it appears on screen
+			 * for the user to see
+			 */
+			printk(KERN_ERR PFX "%s: No disk in drive\n",
+			       drive->name);
+			break;
+		case CAPACITY_INVALID:
+			printk(KERN_ERR PFX "%s: Invalid capacity for disk "
+				"in drive\n", drive->name);
+			break;
+		}
+		ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
+					     pc_buf[desc_start + 4] & 0x03);
+	}
+
+	/* Clik! disk does not support get_flexible_disk_page */
+	if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
+		(void) ide_floppy_get_flexible_disk_page(drive, &pc);
+
+	return rc;
+}
+
+static void ide_floppy_setup(ide_drive_t *drive)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	u16 *id = drive->id;
+
+	drive->pc_callback	 = ide_floppy_callback;
+
+	/*
+	 * We used to check revisions here. At this point however I'm giving up.
+	 * Just assume they are all broken, its easier.
+	 *
+	 * The actual reason for the workarounds was likely a driver bug after
+	 * all rather than a firmware bug, and the workaround below used to hide
+	 * it. It should be fixed as of version 1.9, but to be on the safe side
+	 * we'll leave the limitation below for the 2.2.x tree.
+	 */
+	if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI")) {
+		drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
+		/* This value will be visible in the /proc/ide/hdx/settings */
+		drive->pc_delay = IDEFLOPPY_PC_DELAY;
+		blk_queue_max_hw_sectors(drive->queue, 64);
+	}
+
+	/*
+	 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
+	 * nasty clicking noises without it, so please don't remove this.
+	 */
+	if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA Clik!")) {
+		blk_queue_max_hw_sectors(drive->queue, 64);
+		drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
+		/* IOMEGA Clik! drives do not support lock/unlock commands */
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+	}
+
+	(void) ide_floppy_get_capacity(drive);
+
+	ide_proc_register_driver(drive, floppy->driver);
+}
+
+static void ide_floppy_flush(ide_drive_t *drive)
+{
+}
+
+static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
+{
+	int ret = 0;
+
+	if (ide_do_test_unit_ready(drive, disk))
+		ide_do_start_stop(drive, disk, 1);
+
+	ret = ide_floppy_get_capacity(drive);
+
+	set_capacity(disk, ide_gd_capacity(drive));
+
+	return ret;
+}
+
+const struct ide_disk_ops ide_atapi_disk_ops = {
+	.check		= ide_check_atapi_device,
+	.get_capacity	= ide_floppy_get_capacity,
+	.setup		= ide_floppy_setup,
+	.flush		= ide_floppy_flush,
+	.init_media	= ide_floppy_init_media,
+	.set_doorlock	= ide_set_media_lock,
+	.do_request	= ide_floppy_do_request,
+	.ioctl		= ide_floppy_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= ide_floppy_compat_ioctl,
+#endif
+};
diff --git a/drivers/ide/ide-floppy.h b/drivers/ide/ide-floppy.h
new file mode 100644
index 000000000..8505a5f58
--- /dev/null
+++ b/drivers/ide/ide-floppy.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __IDE_FLOPPY_H
+#define __IDE_FLOPPY_H
+
+#include "ide-gd.h"
+
+#ifdef CONFIG_IDE_GD_ATAPI
+/*
+ * Pages of the SELECT SENSE / MODE SENSE packet commands.
+ * See SFF-8070i spec.
+ */
+#define	IDEFLOPPY_CAPABILITIES_PAGE	0x1b
+#define IDEFLOPPY_FLEXIBLE_DISK_PAGE	0x05
+
+/* IOCTLs used in low-level formatting. */
+#define	IDEFLOPPY_IOCTL_FORMAT_SUPPORTED	0x4600
+#define	IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY	0x4601
+#define	IDEFLOPPY_IOCTL_FORMAT_START		0x4602
+#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS	0x4603
+
+/* ide-floppy.c */
+extern const struct ide_disk_ops ide_atapi_disk_ops;
+void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *, u8);
+void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *);
+
+/* ide-floppy_ioctl.c */
+int ide_floppy_ioctl(ide_drive_t *, struct block_device *, fmode_t,
+		     unsigned int, unsigned long);
+int ide_floppy_compat_ioctl(ide_drive_t *, struct block_device *, fmode_t,
+			    unsigned int, unsigned long);
+
+#ifdef CONFIG_IDE_PROC_FS
+/* ide-floppy_proc.c */
+extern ide_proc_entry_t ide_floppy_proc[];
+extern const struct ide_proc_devset ide_floppy_settings[];
+#endif
+#else
+#define ide_floppy_proc		NULL
+#define ide_floppy_settings	NULL
+#endif
+
+#endif /*__IDE_FLOPPY_H */
diff --git a/drivers/ide/ide-floppy_ioctl.c b/drivers/ide/ide-floppy_ioctl.c
new file mode 100644
index 000000000..39a790ac6
--- /dev/null
+++ b/drivers/ide/ide-floppy_ioctl.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ide-floppy IOCTLs handling.
+ */
+
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/compat.h>
+#include <linux/cdrom.h>
+#include <linux/mutex.h>
+
+#include <asm/unaligned.h>
+
+#include <scsi/scsi_ioctl.h>
+
+#include "ide-floppy.h"
+
+/*
+ * Obtain the list of formattable capacities.
+ * Very similar to ide_floppy_get_capacity, except that we push the capacity
+ * descriptors to userland, instead of our own structures.
+ *
+ * Userland gives us the following structure:
+ *
+ * struct idefloppy_format_capacities {
+ *	int nformats;
+ *	struct {
+ *		int nblocks;
+ *		int blocksize;
+ *	} formats[];
+ * };
+ *
+ * userland initializes nformats to the number of allocated formats[] records.
+ * On exit we set nformats to the number of records we've actually initialized.
+ */
+
+static DEFINE_MUTEX(ide_floppy_ioctl_mutex);
+static int ide_floppy_get_format_capacities(ide_drive_t *drive,
+					    struct ide_atapi_pc *pc,
+					    int __user *arg)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	int i, blocks, length, u_array_size, u_index;
+	int __user *argp;
+	u8 pc_buf[256], header_len, desc_cnt;
+
+	if (get_user(u_array_size, arg))
+		return -EFAULT;
+
+	if (u_array_size <= 0)
+		return -EINVAL;
+
+	ide_floppy_create_read_capacity_cmd(pc);
+
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
+		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
+		return -EIO;
+	}
+
+	header_len = pc_buf[3];
+	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
+
+	u_index = 0;
+	argp = arg + 1;
+
+	/*
+	 * We always skip the first capacity descriptor.  That's the current
+	 * capacity.  We are interested in the remaining descriptors, the
+	 * formattable capacities.
+	 */
+	for (i = 1; i < desc_cnt; i++) {
+		unsigned int desc_start = 4 + i*8;
+
+		if (u_index >= u_array_size)
+			break;	/* User-supplied buffer too small */
+
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
+
+		if (put_user(blocks, argp))
+			return -EFAULT;
+
+		++argp;
+
+		if (put_user(length, argp))
+			return -EFAULT;
+
+		++argp;
+
+		++u_index;
+	}
+
+	if (put_user(u_index, arg))
+		return -EFAULT;
+
+	return 0;
+}
+
+static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc,
+					      u8 *buf, int b, int l,
+					      int flags)
+{
+	ide_init_pc(pc);
+	pc->c[0] = GPCMD_FORMAT_UNIT;
+	pc->c[1] = 0x17;
+
+	memset(buf, 0, 12);
+	buf[1] = 0xA2;
+	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
+
+	if (flags & 1)				/* Verify bit on... */
+		buf[1] ^= 0x20;			/* ... turn off DCRT bit */
+	buf[3] = 8;
+
+	put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4]));
+	put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8]));
+	pc->req_xfer = 12;
+	pc->flags |= PC_FLAG_WRITING;
+}
+
+static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 buf[20];
+
+	drive->atapi_flags &= ~IDE_AFLAG_SRFP;
+
+	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
+	pc->flags |= PC_FLAG_SUPPRESS_ERROR;
+
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
+		return 1;
+
+	if (buf[8 + 2] & 0x40)
+		drive->atapi_flags |= IDE_AFLAG_SRFP;
+
+	return 0;
+}
+
+static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
+				  int __user *arg)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 buf[12];
+	int blocks, length, flags, err = 0;
+
+	if (floppy->openers > 1) {
+		/* Don't format if someone is using the disk */
+		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
+		return -EBUSY;
+	}
+
+	drive->dev_flags |= IDE_DFLAG_FORMAT_IN_PROGRESS;
+
+	/*
+	 * Send ATAPI_FORMAT_UNIT to the drive.
+	 *
+	 * Userland gives us the following structure:
+	 *
+	 * struct idefloppy_format_command {
+	 *        int nblocks;
+	 *        int blocksize;
+	 *        int flags;
+	 *        } ;
+	 *
+	 * flags is a bitmask, currently, the only defined flag is:
+	 *
+	 *        0x01 - verify media after format.
+	 */
+	if (get_user(blocks, arg) ||
+			get_user(length, arg+1) ||
+			get_user(flags, arg+2)) {
+		err = -EFAULT;
+		goto out;
+	}
+
+	ide_floppy_get_sfrp_bit(drive, pc);
+	ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags);
+
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
+		err = -EIO;
+
+out:
+	if (err)
+		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
+	return err;
+}
+
+/*
+ * Get ATAPI_FORMAT_UNIT progress indication.
+ *
+ * Userland gives a pointer to an int.  The int is set to a progress
+ * indicator 0-65536, with 65536=100%.
+ *
+ * If the drive does not support format progress indication, we just check
+ * the dsc bit, and return either 0 or 65536.
+ */
+
+static int ide_floppy_get_format_progress(ide_drive_t *drive,
+					  struct ide_atapi_pc *pc,
+					  int __user *arg)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 sense_buf[18];
+	int progress_indication = 0x10000;
+
+	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
+		ide_create_request_sense_cmd(drive, pc);
+		if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf,
+				      pc->req_xfer))
+			return -EIO;
+
+		if (floppy->sense_key == 2 &&
+		    floppy->asc == 4 &&
+		    floppy->ascq == 4)
+			progress_indication = floppy->progress_indication;
+
+		/* Else assume format_unit has finished, and we're at 0x10000 */
+	} else {
+		ide_hwif_t *hwif = drive->hwif;
+		unsigned long flags;
+		u8 stat;
+
+		local_irq_save(flags);
+		stat = hwif->tp_ops->read_status(hwif);
+		local_irq_restore(flags);
+
+		progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
+	}
+
+	if (put_user(progress_indication, arg))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
+			       unsigned long arg, unsigned int cmd)
+{
+	struct ide_disk_obj *floppy = drive->driver_data;
+	struct gendisk *disk = floppy->disk;
+	int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
+
+	if (floppy->openers > 1)
+		return -EBUSY;
+
+	ide_set_media_lock(drive, disk, prevent);
+
+	if (cmd == CDROMEJECT)
+		ide_do_start_stop(drive, disk, 2);
+
+	return 0;
+}
+
+static int ide_floppy_format_ioctl(ide_drive_t *drive, struct ide_atapi_pc *pc,
+				   fmode_t mode, unsigned int cmd,
+				   void __user *argp)
+{
+	switch (cmd) {
+	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
+		return 0;
+	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
+		return ide_floppy_get_format_capacities(drive, pc, argp);
+	case IDEFLOPPY_IOCTL_FORMAT_START:
+		if (!(mode & FMODE_WRITE))
+			return -EPERM;
+		return ide_floppy_format_unit(drive, pc, (int __user *)argp);
+	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
+		return ide_floppy_get_format_progress(drive, pc, argp);
+	default:
+		return -ENOTTY;
+	}
+}
+
+int ide_floppy_ioctl(ide_drive_t *drive, struct block_device *bdev,
+		     fmode_t mode, unsigned int cmd, unsigned long arg)
+{
+	struct ide_atapi_pc pc;
+	void __user *argp = (void __user *)arg;
+	int err;
+
+	mutex_lock(&ide_floppy_ioctl_mutex);
+	if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) {
+		err = ide_floppy_lockdoor(drive, &pc, arg, cmd);
+		goto out;
+	}
+
+	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
+	if (err != -ENOTTY)
+		goto out;
+
+	/*
+	 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
+	 * and CDROM_SEND_PACKET (legacy) ioctls
+	 */
+	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
+		err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
+
+	if (err == -ENOTTY)
+		err = generic_ide_ioctl(drive, bdev, cmd, arg);
+
+out:
+	mutex_unlock(&ide_floppy_ioctl_mutex);
+	return err;
+}
+
+#ifdef CONFIG_COMPAT
+int ide_floppy_compat_ioctl(ide_drive_t *drive, struct block_device *bdev,
+			    fmode_t mode, unsigned int cmd, unsigned long arg)
+{
+	struct ide_atapi_pc pc;
+	void __user *argp = compat_ptr(arg);
+	int err;
+
+	mutex_lock(&ide_floppy_ioctl_mutex);
+	if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) {
+		err = ide_floppy_lockdoor(drive, &pc, arg, cmd);
+		goto out;
+	}
+
+	err = ide_floppy_format_ioctl(drive, &pc, mode, cmd, argp);
+	if (err != -ENOTTY)
+		goto out;
+
+	/*
+	 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
+	 * and CDROM_SEND_PACKET (legacy) ioctls
+	 */
+	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
+		err = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
+
+	if (err == -ENOTTY)
+		err = generic_ide_ioctl(drive, bdev, cmd, arg);
+
+out:
+	mutex_unlock(&ide_floppy_ioctl_mutex);
+	return err;
+}
+#endif
diff --git a/drivers/ide/ide-floppy_proc.c b/drivers/ide/ide-floppy_proc.c
new file mode 100644
index 000000000..7f697ddb5
--- /dev/null
+++ b/drivers/ide/ide-floppy_proc.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+#include <linux/seq_file.h>
+
+#include "ide-floppy.h"
+
+static int idefloppy_capacity_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t*drive = (ide_drive_t *)m->private;
+
+	seq_printf(m, "%llu\n", (long long)ide_gd_capacity(drive));
+	return 0;
+}
+
+ide_proc_entry_t ide_floppy_proc[] = {
+	{ "capacity",	S_IFREG|S_IRUGO, idefloppy_capacity_proc_show	},
+	{ "geometry",	S_IFREG|S_IRUGO, ide_geometry_proc_show		},
+	{}
+};
+
+ide_devset_rw_field(bios_cyl, bios_cyl);
+ide_devset_rw_field(bios_head, bios_head);
+ide_devset_rw_field(bios_sect, bios_sect);
+ide_devset_rw_field(ticks, pc_delay);
+
+const struct ide_proc_devset ide_floppy_settings[] = {
+	IDE_PROC_DEVSET(bios_cyl,  0, 1023),
+	IDE_PROC_DEVSET(bios_head, 0,  255),
+	IDE_PROC_DEVSET(bios_sect, 0,   63),
+	IDE_PROC_DEVSET(ticks,	   0,  255),
+	{ NULL },
+};
diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
new file mode 100644
index 000000000..e2b6c8258
--- /dev/null
+++ b/drivers/ide/ide-gd.c
@@ -0,0 +1,432 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/mutex.h>
+#include <linux/ide.h>
+#include <linux/hdreg.h>
+#include <linux/dmi.h>
+#include <linux/slab.h>
+
+#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
+#define IDE_DISK_MINORS		(1 << PARTN_BITS)
+#else
+#define IDE_DISK_MINORS		0
+#endif
+
+#include "ide-disk.h"
+#include "ide-floppy.h"
+
+#define IDE_GD_VERSION	"1.18"
+
+/* module parameters */
+static DEFINE_MUTEX(ide_gd_mutex);
+static unsigned long debug_mask;
+module_param(debug_mask, ulong, 0644);
+
+static DEFINE_MUTEX(ide_disk_ref_mutex);
+
+static void ide_disk_release(struct device *);
+
+static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
+{
+	struct ide_disk_obj *idkp = NULL;
+
+	mutex_lock(&ide_disk_ref_mutex);
+	idkp = ide_drv_g(disk, ide_disk_obj);
+	if (idkp) {
+		if (ide_device_get(idkp->drive))
+			idkp = NULL;
+		else
+			get_device(&idkp->dev);
+	}
+	mutex_unlock(&ide_disk_ref_mutex);
+	return idkp;
+}
+
+static void ide_disk_put(struct ide_disk_obj *idkp)
+{
+	ide_drive_t *drive = idkp->drive;
+
+	mutex_lock(&ide_disk_ref_mutex);
+	put_device(&idkp->dev);
+	ide_device_put(drive);
+	mutex_unlock(&ide_disk_ref_mutex);
+}
+
+sector_t ide_gd_capacity(ide_drive_t *drive)
+{
+	return drive->capacity64;
+}
+
+static int ide_gd_probe(ide_drive_t *);
+
+static void ide_gd_remove(ide_drive_t *drive)
+{
+	struct ide_disk_obj *idkp = drive->driver_data;
+	struct gendisk *g = idkp->disk;
+
+	ide_proc_unregister_driver(drive, idkp->driver);
+	device_del(&idkp->dev);
+	del_gendisk(g);
+	drive->disk_ops->flush(drive);
+
+	mutex_lock(&ide_disk_ref_mutex);
+	put_device(&idkp->dev);
+	mutex_unlock(&ide_disk_ref_mutex);
+}
+
+static void ide_disk_release(struct device *dev)
+{
+	struct ide_disk_obj *idkp = to_ide_drv(dev, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+	struct gendisk *g = idkp->disk;
+
+	drive->disk_ops = NULL;
+	drive->driver_data = NULL;
+	g->private_data = NULL;
+	put_disk(g);
+	kfree(idkp);
+}
+
+/*
+ * On HPA drives the capacity needs to be
+ * reinitialized on resume otherwise the disk
+ * can not be used and a hard reset is required
+ */
+static void ide_gd_resume(ide_drive_t *drive)
+{
+	if (ata_id_hpa_enabled(drive->id))
+		(void)drive->disk_ops->get_capacity(drive);
+}
+
+static const struct dmi_system_id ide_coldreboot_table[] = {
+	{
+		/* Acer TravelMate 66x cuts power during reboot */
+		.ident   = "Acer TravelMate 660",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
+		},
+	},
+
+	{ }	/* terminate list */
+};
+
+static void ide_gd_shutdown(ide_drive_t *drive)
+{
+#ifdef	CONFIG_ALPHA
+	/* On Alpha, halt(8) doesn't actually turn the machine off,
+	   it puts you into the sort of firmware monitor. Typically,
+	   it's used to boot another kernel image, so it's not much
+	   different from reboot(8). Therefore, we don't need to
+	   spin down the disk in this case, especially since Alpha
+	   firmware doesn't handle disks in standby mode properly.
+	   On the other hand, it's reasonably safe to turn the power
+	   off when the shutdown process reaches the firmware prompt,
+	   as the firmware initialization takes rather long time -
+	   at least 10 seconds, which should be sufficient for
+	   the disk to expire its write cache. */
+	if (system_state != SYSTEM_POWER_OFF) {
+#else
+	if (system_state == SYSTEM_RESTART &&
+		!dmi_check_system(ide_coldreboot_table)) {
+#endif
+		drive->disk_ops->flush(drive);
+		return;
+	}
+
+	printk(KERN_INFO "Shutdown: %s\n", drive->name);
+
+	drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
+}
+
+#ifdef CONFIG_IDE_PROC_FS
+static ide_proc_entry_t *ide_disk_proc_entries(ide_drive_t *drive)
+{
+	return (drive->media == ide_disk) ? ide_disk_proc : ide_floppy_proc;
+}
+
+static const struct ide_proc_devset *ide_disk_proc_devsets(ide_drive_t *drive)
+{
+	return (drive->media == ide_disk) ? ide_disk_settings
+					  : ide_floppy_settings;
+}
+#endif
+
+static ide_startstop_t ide_gd_do_request(ide_drive_t *drive,
+					 struct request *rq, sector_t sector)
+{
+	return drive->disk_ops->do_request(drive, rq, sector);
+}
+
+static struct ide_driver ide_gd_driver = {
+	.gen_driver = {
+		.owner		= THIS_MODULE,
+		.name		= "ide-gd",
+		.bus		= &ide_bus_type,
+	},
+	.probe			= ide_gd_probe,
+	.remove			= ide_gd_remove,
+	.resume			= ide_gd_resume,
+	.shutdown		= ide_gd_shutdown,
+	.version		= IDE_GD_VERSION,
+	.do_request		= ide_gd_do_request,
+#ifdef CONFIG_IDE_PROC_FS
+	.proc_entries		= ide_disk_proc_entries,
+	.proc_devsets		= ide_disk_proc_devsets,
+#endif
+};
+
+static int ide_gd_open(struct block_device *bdev, fmode_t mode)
+{
+	struct gendisk *disk = bdev->bd_disk;
+	struct ide_disk_obj *idkp;
+	ide_drive_t *drive;
+	int ret = 0;
+
+	idkp = ide_disk_get(disk);
+	if (idkp == NULL)
+		return -ENXIO;
+
+	drive = idkp->drive;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	idkp->openers++;
+
+	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
+		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
+		/* Just in case */
+
+		ret = drive->disk_ops->init_media(drive, disk);
+
+		/*
+		 * Allow O_NDELAY to open a drive without a disk, or with an
+		 * unreadable disk, so that we can get the format capacity
+		 * of the drive or begin the format - Sam
+		 */
+		if (ret && (mode & FMODE_NDELAY) == 0) {
+			ret = -EIO;
+			goto out_put_idkp;
+		}
+
+		if ((drive->dev_flags & IDE_DFLAG_WP) && (mode & FMODE_WRITE)) {
+			ret = -EROFS;
+			goto out_put_idkp;
+		}
+
+		/*
+		 * Ignore the return code from door_lock,
+		 * since the open() has already succeeded,
+		 * and the door_lock is irrelevant at this point.
+		 */
+		drive->disk_ops->set_doorlock(drive, disk, 1);
+		if (__invalidate_device(bdev, true))
+			pr_warn("VFS: busy inodes on changed media %s\n",
+				bdev->bd_disk->disk_name);
+		drive->disk_ops->get_capacity(drive);
+		set_capacity(disk, ide_gd_capacity(drive));
+		set_bit(GD_NEED_PART_SCAN, &disk->state);
+	} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
+		ret = -EBUSY;
+		goto out_put_idkp;
+	}
+	return 0;
+
+out_put_idkp:
+	idkp->openers--;
+	ide_disk_put(idkp);
+	return ret;
+}
+
+static int ide_gd_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+	int ret;
+
+	mutex_lock(&ide_gd_mutex);
+	ret = ide_gd_open(bdev, mode);
+	mutex_unlock(&ide_gd_mutex);
+
+	return ret;
+}
+
+
+static void ide_gd_release(struct gendisk *disk, fmode_t mode)
+{
+	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	mutex_lock(&ide_gd_mutex);
+	if (idkp->openers == 1)
+		drive->disk_ops->flush(drive);
+
+	if ((drive->dev_flags & IDE_DFLAG_REMOVABLE) && idkp->openers == 1) {
+		drive->disk_ops->set_doorlock(drive, disk, 0);
+		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
+	}
+
+	idkp->openers--;
+
+	ide_disk_put(idkp);
+	mutex_unlock(&ide_gd_mutex);
+}
+
+static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+
+	geo->heads = drive->bios_head;
+	geo->sectors = drive->bios_sect;
+	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
+	return 0;
+}
+
+static void ide_gd_unlock_native_capacity(struct gendisk *disk)
+{
+	struct ide_disk_obj *idkp = ide_drv_g(disk, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+	const struct ide_disk_ops *disk_ops = drive->disk_ops;
+
+	if (disk_ops->unlock_native_capacity)
+		disk_ops->unlock_native_capacity(drive);
+}
+
+static int ide_gd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+
+	return drive->disk_ops->ioctl(drive, bdev, mode, cmd, arg);
+}
+
+#ifdef CONFIG_COMPAT
+static int ide_gd_compat_ioctl(struct block_device *bdev, fmode_t mode,
+			       unsigned int cmd, unsigned long arg)
+{
+	struct ide_disk_obj *idkp = ide_drv_g(bdev->bd_disk, ide_disk_obj);
+	ide_drive_t *drive = idkp->drive;
+
+	if (!drive->disk_ops->compat_ioctl)
+		return -ENOIOCTLCMD;
+
+	return drive->disk_ops->compat_ioctl(drive, bdev, mode, cmd, arg);
+}
+#endif
+
+static const struct block_device_operations ide_gd_ops = {
+	.owner			= THIS_MODULE,
+	.open			= ide_gd_unlocked_open,
+	.release		= ide_gd_release,
+	.ioctl			= ide_gd_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl		= ide_gd_compat_ioctl,
+#endif
+	.getgeo			= ide_gd_getgeo,
+	.unlock_native_capacity	= ide_gd_unlock_native_capacity,
+};
+
+static int ide_gd_probe(ide_drive_t *drive)
+{
+	const struct ide_disk_ops *disk_ops = NULL;
+	struct ide_disk_obj *idkp;
+	struct gendisk *g;
+
+	/* strstr("foo", "") is non-NULL */
+	if (!strstr("ide-gd", drive->driver_req))
+		goto failed;
+
+#ifdef CONFIG_IDE_GD_ATA
+	if (drive->media == ide_disk)
+		disk_ops = &ide_ata_disk_ops;
+#endif
+#ifdef CONFIG_IDE_GD_ATAPI
+	if (drive->media == ide_floppy)
+		disk_ops = &ide_atapi_disk_ops;
+#endif
+	if (disk_ops == NULL)
+		goto failed;
+
+	if (disk_ops->check(drive, DRV_NAME) == 0) {
+		printk(KERN_ERR PFX "%s: not supported by this driver\n",
+			drive->name);
+		goto failed;
+	}
+
+	idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
+	if (!idkp) {
+		printk(KERN_ERR PFX "%s: can't allocate a disk structure\n",
+			drive->name);
+		goto failed;
+	}
+
+	g = alloc_disk_node(IDE_DISK_MINORS, hwif_to_node(drive->hwif));
+	if (!g)
+		goto out_free_idkp;
+
+	ide_init_disk(g, drive);
+
+	idkp->dev.parent = &drive->gendev;
+	idkp->dev.release = ide_disk_release;
+	dev_set_name(&idkp->dev, "%s", dev_name(&drive->gendev));
+
+	if (device_register(&idkp->dev))
+		goto out_free_disk;
+
+	idkp->drive = drive;
+	idkp->driver = &ide_gd_driver;
+	idkp->disk = g;
+
+	g->private_data = &idkp->driver;
+
+	drive->driver_data = idkp;
+	drive->debug_mask = debug_mask;
+	drive->disk_ops = disk_ops;
+
+	disk_ops->setup(drive);
+
+	set_capacity(g, ide_gd_capacity(drive));
+
+	g->minors = IDE_DISK_MINORS;
+	g->flags |= GENHD_FL_EXT_DEVT;
+	if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
+		g->flags = GENHD_FL_REMOVABLE;
+	g->fops = &ide_gd_ops;
+	g->events = DISK_EVENT_MEDIA_CHANGE;
+	device_add_disk(&drive->gendev, g, NULL);
+	return 0;
+
+out_free_disk:
+	put_disk(g);
+out_free_idkp:
+	kfree(idkp);
+failed:
+	return -ENODEV;
+}
+
+static int __init ide_gd_init(void)
+{
+	printk(KERN_INFO DRV_NAME " driver " IDE_GD_VERSION "\n");
+	return driver_register(&ide_gd_driver.gen_driver);
+}
+
+static void __exit ide_gd_exit(void)
+{
+	driver_unregister(&ide_gd_driver.gen_driver);
+}
+
+MODULE_ALIAS("ide:*m-disk*");
+MODULE_ALIAS("ide-disk");
+MODULE_ALIAS("ide:*m-floppy*");
+MODULE_ALIAS("ide-floppy");
+module_init(ide_gd_init);
+module_exit(ide_gd_exit);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("generic ATA/ATAPI disk driver");
diff --git a/drivers/ide/ide-gd.h b/drivers/ide/ide-gd.h
new file mode 100644
index 000000000..af3fe1880
--- /dev/null
+++ b/drivers/ide/ide-gd.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __IDE_GD_H
+#define __IDE_GD_H
+
+#define DRV_NAME "ide-gd"
+#define PFX DRV_NAME ": "
+
+/* define to see debug info */
+#define IDE_GD_DEBUG_LOG	0
+
+#if IDE_GD_DEBUG_LOG
+#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
+#else
+#define ide_debug_log(lvl, fmt, args...) do {} while (0)
+#endif
+
+struct ide_disk_obj {
+	ide_drive_t		*drive;
+	struct ide_driver	*driver;
+	struct gendisk		*disk;
+	struct device		dev;
+	unsigned int		openers;	/* protected by BKL for now */
+
+	/* used for blk_{fs,pc}_request() requests */
+	struct ide_atapi_pc queued_pc;
+
+	/* Last error information */
+	u8 sense_key, asc, ascq;
+
+	int progress_indication;
+
+	/* Device information */
+	/* Current format */
+	int blocks, block_size, bs_factor;
+	/* Last format capacity descriptor */
+	u8 cap_desc[8];
+	/* Copy of the flexible disk page */
+	u8 flexible_disk_page[32];
+};
+
+sector_t ide_gd_capacity(ide_drive_t *);
+
+#endif /* __IDE_GD_H */
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
new file mode 100644
index 000000000..80c0d69b8
--- /dev/null
+++ b/drivers/ide/ide-generic.c
@@ -0,0 +1,139 @@
+/*
+ * generic/default IDE host driver
+ *
+ * Copyright (C) 2004, 2008-2009 Bartlomiej Zolnierkiewicz
+ * This code was split off from ide.c.  See it for original copyrights.
+ *
+ * May be copied or modified under the terms of the GNU General Public License.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+#include <linux/pci_ids.h>
+
+/* FIXME: convert arm to use ide_platform host driver */
+#ifdef CONFIG_ARM
+#include <asm/irq.h>
+#endif
+
+#define DRV_NAME	"ide_generic"
+
+static int probe_mask;
+module_param(probe_mask, int, 0);
+MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
+
+static const struct ide_port_info ide_generic_port_info = {
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.chipset		= ide_generic,
+};
+
+#ifdef CONFIG_ARM
+static const u16 legacy_bases[] = { 0x1f0 };
+static const int legacy_irqs[]  = { IRQ_HARDDISK };
+#elif defined(CONFIG_ALPHA)
+static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168 };
+static const int legacy_irqs[]  = { 14, 15, 11, 10 };
+#else
+static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
+static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
+#endif
+
+static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
+{
+#ifdef CONFIG_PCI
+	struct pci_dev *p = NULL;
+	u16 val;
+
+	for_each_pci_dev(p) {
+		if (pci_resource_start(p, 0) == 0x1f0)
+			*primary = 1;
+		if (pci_resource_start(p, 2) == 0x170)
+			*secondary = 1;
+
+		/* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
+		if (p->vendor == PCI_VENDOR_ID_CYRIX &&
+		    (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
+		     p->device == PCI_DEVICE_ID_CYRIX_5520))
+			*primary = *secondary = 1;
+
+		/* Intel MPIIX - PIO ATA on non PCI side of bridge */
+		if (p->vendor == PCI_VENDOR_ID_INTEL &&
+		    p->device == PCI_DEVICE_ID_INTEL_82371MX) {
+			pci_read_config_word(p, 0x6C, &val);
+			if (val & 0x8000) {
+				/* ATA port enabled */
+				if (val & 0x4000)
+					*secondary = 1;
+				else
+					*primary = 1;
+			}
+		}
+	}
+#endif
+}
+
+static int __init ide_generic_init(void)
+{
+	struct ide_hw hw, *hws[] = { &hw };
+	unsigned long io_addr;
+	int i, rc = 0, primary = 0, secondary = 0;
+
+	ide_generic_check_pci_legacy_iobases(&primary, &secondary);
+
+	if (!probe_mask) {
+		printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
+		     "module parameter for probing all legacy ISA IDE ports\n");
+
+		if (primary == 0)
+			probe_mask |= 0x1;
+
+		if (secondary == 0)
+			probe_mask |= 0x2;
+	} else
+		printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
+			"upon user request\n");
+
+	for (i = 0; i < ARRAY_SIZE(legacy_bases); i++) {
+		io_addr = legacy_bases[i];
+
+		if ((probe_mask & (1 << i)) && io_addr) {
+			if (!request_region(io_addr, 8, DRV_NAME)) {
+				printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
+						"not free.\n",
+						DRV_NAME, io_addr, io_addr + 7);
+				rc = -EBUSY;
+				continue;
+			}
+
+			if (!request_region(io_addr + 0x206, 1, DRV_NAME)) {
+				printk(KERN_ERR "%s: I/O resource 0x%lX "
+						"not free.\n",
+						DRV_NAME, io_addr + 0x206);
+				release_region(io_addr, 8);
+				rc = -EBUSY;
+				continue;
+			}
+
+			memset(&hw, 0, sizeof(hw));
+			ide_std_init_ports(&hw, io_addr, io_addr + 0x206);
+#ifdef CONFIG_IA64
+			hw.irq = isa_irq_to_vector(legacy_irqs[i]);
+#else
+			hw.irq = legacy_irqs[i];
+#endif
+			rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL);
+			if (rc) {
+				release_region(io_addr + 0x206, 1);
+				release_region(io_addr, 8);
+			}
+		}
+	}
+
+	return rc;
+}
+
+module_init(ide_generic_init);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c
new file mode 100644
index 000000000..94bdcf1ea
--- /dev/null
+++ b/drivers/ide/ide-io-std.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+
+#if defined(CONFIG_ARM) || defined(CONFIG_M68K) || defined(CONFIG_MIPS) || \
+    defined(CONFIG_PARISC) || defined(CONFIG_PPC) || defined(CONFIG_SPARC)
+#include <asm/ide.h>
+#else
+#include <asm-generic/ide_iops.h>
+#endif
+
+/*
+ *	Conventional PIO operations for ATA devices
+ */
+
+static u8 ide_inb(unsigned long port)
+{
+	return (u8) inb(port);
+}
+
+static void ide_outb(u8 val, unsigned long port)
+{
+	outb(val, port);
+}
+
+/*
+ *	MMIO operations, typically used for SATA controllers
+ */
+
+static u8 ide_mm_inb(unsigned long port)
+{
+	return (u8) readb((void __iomem *) port);
+}
+
+static void ide_mm_outb(u8 value, unsigned long port)
+{
+	writeb(value, (void __iomem *) port);
+}
+
+void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
+{
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
+	else
+		outb(cmd, hwif->io_ports.command_addr);
+}
+EXPORT_SYMBOL_GPL(ide_exec_command);
+
+u8 ide_read_status(ide_hwif_t *hwif)
+{
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		return readb((void __iomem *)hwif->io_ports.status_addr);
+	else
+		return inb(hwif->io_ports.status_addr);
+}
+EXPORT_SYMBOL_GPL(ide_read_status);
+
+u8 ide_read_altstatus(ide_hwif_t *hwif)
+{
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		return readb((void __iomem *)hwif->io_ports.ctl_addr);
+	else
+		return inb(hwif->io_ports.ctl_addr);
+}
+EXPORT_SYMBOL_GPL(ide_read_altstatus);
+
+void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
+{
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+	else
+		outb(ctl, hwif->io_ports.ctl_addr);
+}
+EXPORT_SYMBOL_GPL(ide_write_devctl);
+
+void ide_dev_select(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 select = drive->select | ATA_DEVICE_OBS;
+
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		writeb(select, (void __iomem *)hwif->io_ports.device_addr);
+	else
+		outb(select, hwif->io_ports.device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_dev_select);
+
+void ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	void (*tf_outb)(u8 addr, unsigned long port);
+	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+	if (mmio)
+		tf_outb = ide_mm_outb;
+	else
+		tf_outb = ide_outb;
+
+	if (valid & IDE_VALID_FEATURE)
+		tf_outb(tf->feature, io_ports->feature_addr);
+	if (valid & IDE_VALID_NSECT)
+		tf_outb(tf->nsect, io_ports->nsect_addr);
+	if (valid & IDE_VALID_LBAL)
+		tf_outb(tf->lbal, io_ports->lbal_addr);
+	if (valid & IDE_VALID_LBAM)
+		tf_outb(tf->lbam, io_ports->lbam_addr);
+	if (valid & IDE_VALID_LBAH)
+		tf_outb(tf->lbah, io_ports->lbah_addr);
+	if (valid & IDE_VALID_DEVICE)
+		tf_outb(tf->device, io_ports->device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_tf_load);
+
+void ide_tf_read(ide_drive_t *drive, struct ide_taskfile *tf, u8 valid)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	u8 (*tf_inb)(unsigned long port);
+	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+	if (mmio)
+		tf_inb  = ide_mm_inb;
+	else
+		tf_inb  = ide_inb;
+
+	if (valid & IDE_VALID_ERROR)
+		tf->error  = tf_inb(io_ports->feature_addr);
+	if (valid & IDE_VALID_NSECT)
+		tf->nsect  = tf_inb(io_ports->nsect_addr);
+	if (valid & IDE_VALID_LBAL)
+		tf->lbal   = tf_inb(io_ports->lbal_addr);
+	if (valid & IDE_VALID_LBAM)
+		tf->lbam   = tf_inb(io_ports->lbam_addr);
+	if (valid & IDE_VALID_LBAH)
+		tf->lbah   = tf_inb(io_ports->lbah_addr);
+	if (valid & IDE_VALID_DEVICE)
+		tf->device = tf_inb(io_ports->device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_tf_read);
+
+/*
+ * Some localbus EIDE interfaces require a special access sequence
+ * when using 32-bit I/O instructions to transfer data.  We call this
+ * the "vlb_sync" sequence, which consists of three successive reads
+ * of the sector count register location, with interrupts disabled
+ * to ensure that the reads all happen together.
+ */
+static void ata_vlb_sync(unsigned long port)
+{
+	(void)inb(port);
+	(void)inb(port);
+	(void)inb(port);
+}
+
+/*
+ * This is used for most PIO data transfers *from* the IDE interface
+ *
+ * These routines will round up any request for an odd number of bytes,
+ * so if an odd len is specified, be sure that there's at least one
+ * extra byte allocated for the buffer.
+ */
+void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
+		    unsigned int len)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	unsigned long data_addr = io_ports->data_addr;
+	unsigned int words = (len + 1) >> 1;
+	u8 io_32bit = drive->io_32bit;
+	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+	if (io_32bit) {
+		unsigned long flags;
+
+		if ((io_32bit & 2) && !mmio) {
+			local_irq_save(flags);
+			ata_vlb_sync(io_ports->nsect_addr);
+		}
+
+		words >>= 1;
+		if (mmio)
+			__ide_mm_insl((void __iomem *)data_addr, buf, words);
+		else
+			insl(data_addr, buf, words);
+
+		if ((io_32bit & 2) && !mmio)
+			local_irq_restore(flags);
+
+		if (((len + 1) & 3) < 2)
+			return;
+
+		buf += len & ~3;
+		words = 1;
+	}
+
+	if (mmio)
+		__ide_mm_insw((void __iomem *)data_addr, buf, words);
+	else
+		insw(data_addr, buf, words);
+}
+EXPORT_SYMBOL_GPL(ide_input_data);
+
+/*
+ * This is used for most PIO data transfers *to* the IDE interface
+ */
+void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf,
+		     unsigned int len)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	unsigned long data_addr = io_ports->data_addr;
+	unsigned int words = (len + 1) >> 1;
+	u8 io_32bit = drive->io_32bit;
+	u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+
+	if (io_32bit) {
+		unsigned long flags;
+
+		if ((io_32bit & 2) && !mmio) {
+			local_irq_save(flags);
+			ata_vlb_sync(io_ports->nsect_addr);
+		}
+
+		words >>= 1;
+		if (mmio)
+			__ide_mm_outsl((void __iomem *)data_addr, buf, words);
+		else
+			outsl(data_addr, buf, words);
+
+		if ((io_32bit & 2) && !mmio)
+			local_irq_restore(flags);
+
+		if (((len + 1) & 3) < 2)
+			return;
+
+		buf += len & ~3;
+		words = 1;
+	}
+
+	if (mmio)
+		__ide_mm_outsw((void __iomem *)data_addr, buf, words);
+	else
+		outsw(data_addr, buf, words);
+}
+EXPORT_SYMBOL_GPL(ide_output_data);
+
+const struct ide_tp_ops default_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
new file mode 100644
index 000000000..4867b67b6
--- /dev/null
+++ b/drivers/ide/ide-io.c
@@ -0,0 +1,904 @@
+/*
+ *	IDE I/O functions
+ *
+ *	Basic PIO and command management functionality.
+ *
+ * This code was split off from ide.c. See ide.c for history and original
+ * copyrights.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * For the avoidance of doubt the "preferred form" of this code is one which
+ * is in an open non patent encumbered format. Where cryptographic key signing
+ * forms part of the process of creating an executable the information
+ * including keys needed to generate an equivalently functional executable
+ * are deemed to be part of the source code.
+ */
+ 
+ 
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/completion.h>
+#include <linux/reboot.h>
+#include <linux/cdrom.h>
+#include <linux/seq_file.h>
+#include <linux/device.h>
+#include <linux/kmod.h>
+#include <linux/scatterlist.h>
+#include <linux/bitops.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+int ide_end_rq(ide_drive_t *drive, struct request *rq, blk_status_t error,
+	       unsigned int nr_bytes)
+{
+	/*
+	 * decide whether to reenable DMA -- 3 is a random magic for now,
+	 * if we DMA timeout more than 3 times, just stay in PIO
+	 */
+	if ((drive->dev_flags & IDE_DFLAG_DMA_PIO_RETRY) &&
+	    drive->retry_pio <= 3) {
+		drive->dev_flags &= ~IDE_DFLAG_DMA_PIO_RETRY;
+		ide_dma_on(drive);
+	}
+
+	if (!blk_update_request(rq, error, nr_bytes)) {
+		if (rq == drive->sense_rq) {
+			drive->sense_rq = NULL;
+			drive->sense_rq_active = false;
+		}
+
+		__blk_mq_end_request(rq, error);
+		return 0;
+	}
+
+	return 1;
+}
+EXPORT_SYMBOL_GPL(ide_end_rq);
+
+void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
+{
+	const struct ide_tp_ops *tp_ops = drive->hwif->tp_ops;
+	struct ide_taskfile *tf = &cmd->tf;
+	struct request *rq = cmd->rq;
+	u8 tf_cmd = tf->command;
+
+	tf->error = err;
+	tf->status = stat;
+
+	if (cmd->ftf_flags & IDE_FTFLAG_IN_DATA) {
+		u8 data[2];
+
+		tp_ops->input_data(drive, cmd, data, 2);
+
+		cmd->tf.data  = data[0];
+		cmd->hob.data = data[1];
+	}
+
+	ide_tf_readback(drive, cmd);
+
+	if ((cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) &&
+	    tf_cmd == ATA_CMD_IDLEIMMEDIATE) {
+		if (tf->lbal != 0xc4) {
+			printk(KERN_ERR "%s: head unload failed!\n",
+			       drive->name);
+			ide_tf_dump(drive->name, cmd);
+		} else
+			drive->dev_flags |= IDE_DFLAG_PARKED;
+	}
+
+	if (rq && ata_taskfile_request(rq)) {
+		struct ide_cmd *orig_cmd = ide_req(rq)->special;
+
+		if (cmd->tf_flags & IDE_TFLAG_DYN)
+			kfree(orig_cmd);
+		else if (cmd != orig_cmd)
+			memcpy(orig_cmd, cmd, sizeof(*cmd));
+	}
+}
+
+int ide_complete_rq(ide_drive_t *drive, blk_status_t error, unsigned int nr_bytes)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq = hwif->rq;
+	int rc;
+
+	/*
+	 * if failfast is set on a request, override number of sectors
+	 * and complete the whole request right now
+	 */
+	if (blk_noretry_request(rq) && error)
+		nr_bytes = blk_rq_sectors(rq) << 9;
+
+	rc = ide_end_rq(drive, rq, error, nr_bytes);
+	if (rc == 0)
+		hwif->rq = NULL;
+
+	return rc;
+}
+EXPORT_SYMBOL(ide_complete_rq);
+
+void ide_kill_rq(ide_drive_t *drive, struct request *rq)
+{
+	u8 drv_req = ata_misc_request(rq) && rq->rq_disk;
+	u8 media = drive->media;
+
+	drive->failed_pc = NULL;
+
+	if ((media == ide_floppy || media == ide_tape) && drv_req) {
+		scsi_req(rq)->result = 0;
+	} else {
+		if (media == ide_tape)
+			scsi_req(rq)->result = IDE_DRV_ERROR_GENERAL;
+		else if (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+			scsi_req(rq)->result = -EIO;
+	}
+
+	ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(rq));
+}
+
+static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
+{
+	tf->nsect   = drive->sect;
+	tf->lbal    = drive->sect;
+	tf->lbam    = drive->cyl;
+	tf->lbah    = drive->cyl >> 8;
+	tf->device  = (drive->head - 1) | drive->select;
+	tf->command = ATA_CMD_INIT_DEV_PARAMS;
+}
+
+static void ide_tf_set_restore_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
+{
+	tf->nsect   = drive->sect;
+	tf->command = ATA_CMD_RESTORE;
+}
+
+static void ide_tf_set_setmult_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
+{
+	tf->nsect   = drive->mult_req;
+	tf->command = ATA_CMD_SET_MULTI;
+}
+
+/**
+ *	do_special		-	issue some special commands
+ *	@drive: drive the command is for
+ *
+ *	do_special() is used to issue ATA_CMD_INIT_DEV_PARAMS,
+ *	ATA_CMD_RESTORE and ATA_CMD_SET_MULTI commands to a drive.
+ */
+
+static ide_startstop_t do_special(ide_drive_t *drive)
+{
+	struct ide_cmd cmd;
+
+#ifdef DEBUG
+	printk(KERN_DEBUG "%s: %s: 0x%02x\n", drive->name, __func__,
+		drive->special_flags);
+#endif
+	if (drive->media != ide_disk) {
+		drive->special_flags = 0;
+		drive->mult_req = 0;
+		return ide_stopped;
+	}
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.protocol = ATA_PROT_NODATA;
+
+	if (drive->special_flags & IDE_SFLAG_SET_GEOMETRY) {
+		drive->special_flags &= ~IDE_SFLAG_SET_GEOMETRY;
+		ide_tf_set_specify_cmd(drive, &cmd.tf);
+	} else if (drive->special_flags & IDE_SFLAG_RECALIBRATE) {
+		drive->special_flags &= ~IDE_SFLAG_RECALIBRATE;
+		ide_tf_set_restore_cmd(drive, &cmd.tf);
+	} else if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) {
+		drive->special_flags &= ~IDE_SFLAG_SET_MULTMODE;
+		ide_tf_set_setmult_cmd(drive, &cmd.tf);
+	} else
+		BUG();
+
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	cmd.tf_flags = IDE_TFLAG_CUSTOM_HANDLER;
+
+	do_rw_taskfile(drive, &cmd);
+
+	return ide_started;
+}
+
+void ide_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct scatterlist *sg = hwif->sg_table, *last_sg = NULL;
+	struct request *rq = cmd->rq;
+
+	cmd->sg_nents = __blk_rq_map_sg(drive->queue, rq, sg, &last_sg);
+	if (blk_rq_bytes(rq) && (blk_rq_bytes(rq) & rq->q->dma_pad_mask))
+		last_sg->length +=
+			(rq->q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
+}
+EXPORT_SYMBOL_GPL(ide_map_sg);
+
+void ide_init_sg_cmd(struct ide_cmd *cmd, unsigned int nr_bytes)
+{
+	cmd->nbytes = cmd->nleft = nr_bytes;
+	cmd->cursg_ofs = 0;
+	cmd->cursg = NULL;
+}
+EXPORT_SYMBOL_GPL(ide_init_sg_cmd);
+
+/**
+ *	execute_drive_command	-	issue special drive command
+ *	@drive: the drive to issue the command on
+ *	@rq: the request structure holding the command
+ *
+ *	execute_drive_cmd() issues a special drive command,  usually 
+ *	initiated by ioctl() from the external hdparm program. The
+ *	command can be a drive command, drive task or taskfile 
+ *	operation. Weirdly you can call it with NULL to wait for
+ *	all commands to finish. Don't do this as that is due to change
+ */
+
+static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
+		struct request *rq)
+{
+	struct ide_cmd *cmd = ide_req(rq)->special;
+
+	if (cmd) {
+		if (cmd->protocol == ATA_PROT_PIO) {
+			ide_init_sg_cmd(cmd, blk_rq_sectors(rq) << 9);
+			ide_map_sg(drive, cmd);
+		}
+
+		return do_rw_taskfile(drive, cmd);
+	}
+
+ 	/*
+ 	 * NULL is actually a valid way of waiting for
+ 	 * all current requests to be flushed from the queue.
+ 	 */
+#ifdef DEBUG
+ 	printk("%s: DRIVE_CMD (null)\n", drive->name);
+#endif
+	scsi_req(rq)->result = 0;
+	ide_complete_rq(drive, BLK_STS_OK, blk_rq_bytes(rq));
+
+ 	return ide_stopped;
+}
+
+static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
+{
+	u8 cmd = scsi_req(rq)->cmd[0];
+
+	switch (cmd) {
+	case REQ_PARK_HEADS:
+	case REQ_UNPARK_HEADS:
+		return ide_do_park_unpark(drive, rq);
+	case REQ_DEVSET_EXEC:
+		return ide_do_devset(drive, rq);
+	case REQ_DRIVE_RESET:
+		return ide_do_reset(drive);
+	default:
+		BUG();
+	}
+}
+
+/**
+ *	start_request	-	start of I/O and command issuing for IDE
+ *
+ *	start_request() initiates handling of a new I/O request. It
+ *	accepts commands and I/O (read/write) requests.
+ *
+ *	FIXME: this function needs a rename
+ */
+ 
+static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
+{
+	ide_startstop_t startstop;
+
+#ifdef DEBUG
+	printk("%s: start_request: current=0x%08lx\n",
+		drive->hwif->name, (unsigned long) rq);
+#endif
+
+	/* bail early if we've exceeded max_failures */
+	if (drive->max_failures && (drive->failures > drive->max_failures)) {
+		rq->rq_flags |= RQF_FAILED;
+		goto kill_rq;
+	}
+
+	if (drive->prep_rq && !drive->prep_rq(drive, rq))
+		return ide_stopped;
+
+	if (ata_pm_request(rq))
+		ide_check_pm_state(drive, rq);
+
+	drive->hwif->tp_ops->dev_select(drive);
+	if (ide_wait_stat(&startstop, drive, drive->ready_stat,
+			  ATA_BUSY | ATA_DRQ, WAIT_READY)) {
+		printk(KERN_ERR "%s: drive not ready for command\n", drive->name);
+		return startstop;
+	}
+
+	if (drive->special_flags == 0) {
+		struct ide_driver *drv;
+
+		/*
+		 * We reset the drive so we need to issue a SETFEATURES.
+		 * Do it _after_ do_special() restored device parameters.
+		 */
+		if (drive->current_speed == 0xff)
+			ide_config_drive_speed(drive, drive->desired_speed);
+
+		if (ata_taskfile_request(rq))
+			return execute_drive_cmd(drive, rq);
+		else if (ata_pm_request(rq)) {
+			struct ide_pm_state *pm = ide_req(rq)->special;
+#ifdef DEBUG_PM
+			printk("%s: start_power_step(step: %d)\n",
+				drive->name, pm->pm_step);
+#endif
+			startstop = ide_start_power_step(drive, rq);
+			if (startstop == ide_stopped &&
+			    pm->pm_step == IDE_PM_COMPLETED)
+				ide_complete_pm_rq(drive, rq);
+			return startstop;
+		} else if (!rq->rq_disk && ata_misc_request(rq))
+			/*
+			 * TODO: Once all ULDs have been modified to
+			 * check for specific op codes rather than
+			 * blindly accepting any special request, the
+			 * check for ->rq_disk above may be replaced
+			 * by a more suitable mechanism or even
+			 * dropped entirely.
+			 */
+			return ide_special_rq(drive, rq);
+
+		drv = *(struct ide_driver **)rq->rq_disk->private_data;
+
+		return drv->do_request(drive, rq, blk_rq_pos(rq));
+	}
+	return do_special(drive);
+kill_rq:
+	ide_kill_rq(drive, rq);
+	return ide_stopped;
+}
+
+/**
+ *	ide_stall_queue		-	pause an IDE device
+ *	@drive: drive to stall
+ *	@timeout: time to stall for (jiffies)
+ *
+ *	ide_stall_queue() can be used by a drive to give excess bandwidth back
+ *	to the port by sleeping for timeout jiffies.
+ */
+ 
+void ide_stall_queue (ide_drive_t *drive, unsigned long timeout)
+{
+	if (timeout > WAIT_WORSTCASE)
+		timeout = WAIT_WORSTCASE;
+	drive->sleep = timeout + jiffies;
+	drive->dev_flags |= IDE_DFLAG_SLEEPING;
+}
+EXPORT_SYMBOL(ide_stall_queue);
+
+static inline int ide_lock_port(ide_hwif_t *hwif)
+{
+	if (hwif->busy)
+		return 1;
+
+	hwif->busy = 1;
+
+	return 0;
+}
+
+static inline void ide_unlock_port(ide_hwif_t *hwif)
+{
+	hwif->busy = 0;
+}
+
+static inline int ide_lock_host(struct ide_host *host, ide_hwif_t *hwif)
+{
+	int rc = 0;
+
+	if (host->host_flags & IDE_HFLAG_SERIALIZE) {
+		rc = test_and_set_bit_lock(IDE_HOST_BUSY, &host->host_busy);
+		if (rc == 0) {
+			if (host->get_lock)
+				host->get_lock(ide_intr, hwif);
+		}
+	}
+	return rc;
+}
+
+static inline void ide_unlock_host(struct ide_host *host)
+{
+	if (host->host_flags & IDE_HFLAG_SERIALIZE) {
+		if (host->release_lock)
+			host->release_lock();
+		clear_bit_unlock(IDE_HOST_BUSY, &host->host_busy);
+	}
+}
+
+void ide_requeue_and_plug(ide_drive_t *drive, struct request *rq)
+{
+	struct request_queue *q = drive->queue;
+
+	/* Use 3ms as that was the old plug delay */
+	if (rq) {
+		blk_mq_requeue_request(rq, false);
+		blk_mq_delay_kick_requeue_list(q, 3);
+	} else
+		blk_mq_delay_run_hw_queue(q->queue_hw_ctx[0], 3);
+}
+
+blk_status_t ide_issue_rq(ide_drive_t *drive, struct request *rq,
+			  bool local_requeue)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_host *host = hwif->host;
+	ide_startstop_t	startstop;
+
+	if (!blk_rq_is_passthrough(rq) && !(rq->rq_flags & RQF_DONTPREP)) {
+		rq->rq_flags |= RQF_DONTPREP;
+		ide_req(rq)->special = NULL;
+	}
+
+	/* HLD do_request() callback might sleep, make sure it's okay */
+	might_sleep();
+
+	if (ide_lock_host(host, hwif))
+		return BLK_STS_DEV_RESOURCE;
+
+	spin_lock_irq(&hwif->lock);
+
+	if (!ide_lock_port(hwif)) {
+		ide_hwif_t *prev_port;
+
+		WARN_ON_ONCE(hwif->rq);
+repeat:
+		prev_port = hwif->host->cur_port;
+		if (drive->dev_flags & IDE_DFLAG_SLEEPING &&
+		    time_after(drive->sleep, jiffies)) {
+			ide_unlock_port(hwif);
+			goto plug_device;
+		}
+
+		if ((hwif->host->host_flags & IDE_HFLAG_SERIALIZE) &&
+		    hwif != prev_port) {
+			ide_drive_t *cur_dev =
+				prev_port ? prev_port->cur_dev : NULL;
+
+			/*
+			 * set nIEN for previous port, drives in the
+			 * quirk list may not like intr setups/cleanups
+			 */
+			if (cur_dev &&
+			    (cur_dev->dev_flags & IDE_DFLAG_NIEN_QUIRK) == 0)
+				prev_port->tp_ops->write_devctl(prev_port,
+								ATA_NIEN |
+								ATA_DEVCTL_OBS);
+
+			hwif->host->cur_port = hwif;
+		}
+		hwif->cur_dev = drive;
+		drive->dev_flags &= ~(IDE_DFLAG_SLEEPING | IDE_DFLAG_PARKED);
+
+		/*
+		 * Sanity: don't accept a request that isn't a PM request
+		 * if we are currently power managed. This is very important as
+		 * blk_stop_queue() doesn't prevent the blk_fetch_request()
+		 * above to return us whatever is in the queue. Since we call
+		 * ide_do_request() ourselves, we end up taking requests while
+		 * the queue is blocked...
+		 */
+		if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
+		    ata_pm_request(rq) == 0 &&
+		    (rq->rq_flags & RQF_PM) == 0) {
+			/* there should be no pending command at this point */
+			ide_unlock_port(hwif);
+			goto plug_device;
+		}
+
+		scsi_req(rq)->resid_len = blk_rq_bytes(rq);
+		hwif->rq = rq;
+
+		spin_unlock_irq(&hwif->lock);
+		startstop = start_request(drive, rq);
+		spin_lock_irq(&hwif->lock);
+
+		if (startstop == ide_stopped) {
+			rq = hwif->rq;
+			hwif->rq = NULL;
+			if (rq)
+				goto repeat;
+			ide_unlock_port(hwif);
+			goto out;
+		}
+	} else {
+plug_device:
+		if (local_requeue)
+			list_add(&rq->queuelist, &drive->rq_list);
+		spin_unlock_irq(&hwif->lock);
+		ide_unlock_host(host);
+		if (!local_requeue)
+			ide_requeue_and_plug(drive, rq);
+		return BLK_STS_OK;
+	}
+
+out:
+	spin_unlock_irq(&hwif->lock);
+	if (rq == NULL)
+		ide_unlock_host(host);
+	return BLK_STS_OK;
+}
+
+/*
+ * Issue a new request to a device.
+ */
+blk_status_t ide_queue_rq(struct blk_mq_hw_ctx *hctx,
+			  const struct blk_mq_queue_data *bd)
+{
+	ide_drive_t *drive = hctx->queue->queuedata;
+	ide_hwif_t *hwif = drive->hwif;
+
+	spin_lock_irq(&hwif->lock);
+	if (drive->sense_rq_active) {
+		spin_unlock_irq(&hwif->lock);
+		return BLK_STS_DEV_RESOURCE;
+	}
+	spin_unlock_irq(&hwif->lock);
+
+	blk_mq_start_request(bd->rq);
+	return ide_issue_rq(drive, bd->rq, false);
+}
+
+static int drive_is_ready(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 stat = 0;
+
+	if (drive->waiting_for_dma)
+		return hwif->dma_ops->dma_test_irq(drive);
+
+	if (hwif->io_ports.ctl_addr &&
+	    (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
+		stat = hwif->tp_ops->read_altstatus(hwif);
+	else
+		/* Note: this may clear a pending IRQ!! */
+		stat = hwif->tp_ops->read_status(hwif);
+
+	if (stat & ATA_BUSY)
+		/* drive busy: definitely not interrupting */
+		return 0;
+
+	/* drive ready: *might* be interrupting */
+	return 1;
+}
+
+/**
+ *	ide_timer_expiry	-	handle lack of an IDE interrupt
+ *	@data: timer callback magic (hwif)
+ *
+ *	An IDE command has timed out before the expected drive return
+ *	occurred. At this point we attempt to clean up the current
+ *	mess. If the current handler includes an expiry handler then
+ *	we invoke the expiry handler, and providing it is happy the
+ *	work is done. If that fails we apply generic recovery rules
+ *	invoking the handler and checking the drive DMA status. We
+ *	have an excessively incestuous relationship with the DMA
+ *	logic that wants cleaning up.
+ */
+ 
+void ide_timer_expiry (struct timer_list *t)
+{
+	ide_hwif_t	*hwif = from_timer(hwif, t, timer);
+	ide_drive_t	*drive;
+	ide_handler_t	*handler;
+	unsigned long	flags;
+	int		wait = -1;
+	int		plug_device = 0;
+	struct request	*rq_in_flight;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+
+	handler = hwif->handler;
+
+	if (handler == NULL || hwif->req_gen != hwif->req_gen_timer) {
+		/*
+		 * Either a marginal timeout occurred
+		 * (got the interrupt just as timer expired),
+		 * or we were "sleeping" to give other devices a chance.
+		 * Either way, we don't really want to complain about anything.
+		 */
+	} else {
+		ide_expiry_t *expiry = hwif->expiry;
+		ide_startstop_t startstop = ide_stopped;
+
+		drive = hwif->cur_dev;
+
+		if (expiry) {
+			wait = expiry(drive);
+			if (wait > 0) { /* continue */
+				/* reset timer */
+				hwif->timer.expires = jiffies + wait;
+				hwif->req_gen_timer = hwif->req_gen;
+				add_timer(&hwif->timer);
+				spin_unlock_irqrestore(&hwif->lock, flags);
+				return;
+			}
+		}
+		hwif->handler = NULL;
+		hwif->expiry = NULL;
+		/*
+		 * We need to simulate a real interrupt when invoking
+		 * the handler() function, which means we need to
+		 * globally mask the specific IRQ:
+		 */
+		spin_unlock(&hwif->lock);
+		/* disable_irq_nosync ?? */
+		disable_irq(hwif->irq);
+
+		if (hwif->polling) {
+			startstop = handler(drive);
+		} else if (drive_is_ready(drive)) {
+			if (drive->waiting_for_dma)
+				hwif->dma_ops->dma_lost_irq(drive);
+			if (hwif->port_ops && hwif->port_ops->clear_irq)
+				hwif->port_ops->clear_irq(drive);
+
+			printk(KERN_WARNING "%s: lost interrupt\n",
+				drive->name);
+			startstop = handler(drive);
+		} else {
+			if (drive->waiting_for_dma)
+				startstop = ide_dma_timeout_retry(drive, wait);
+			else
+				startstop = ide_error(drive, "irq timeout",
+					hwif->tp_ops->read_status(hwif));
+		}
+		/* Disable interrupts again, `handler' might have enabled it */
+		spin_lock_irq(&hwif->lock);
+		enable_irq(hwif->irq);
+		if (startstop == ide_stopped && hwif->polling == 0) {
+			rq_in_flight = hwif->rq;
+			hwif->rq = NULL;
+			ide_unlock_port(hwif);
+			plug_device = 1;
+		}
+	}
+	spin_unlock_irqrestore(&hwif->lock, flags);
+
+	if (plug_device) {
+		ide_unlock_host(hwif->host);
+		ide_requeue_and_plug(drive, rq_in_flight);
+	}
+}
+
+/**
+ *	unexpected_intr		-	handle an unexpected IDE interrupt
+ *	@irq: interrupt line
+ *	@hwif: port being processed
+ *
+ *	There's nothing really useful we can do with an unexpected interrupt,
+ *	other than reading the status register (to clear it), and logging it.
+ *	There should be no way that an irq can happen before we're ready for it,
+ *	so we needn't worry much about losing an "important" interrupt here.
+ *
+ *	On laptops (and "green" PCs), an unexpected interrupt occurs whenever
+ *	the drive enters "idle", "standby", or "sleep" mode, so if the status
+ *	looks "good", we just ignore the interrupt completely.
+ *
+ *	This routine assumes __cli() is in effect when called.
+ *
+ *	If an unexpected interrupt happens on irq15 while we are handling irq14
+ *	and if the two interfaces are "serialized" (CMD640), then it looks like
+ *	we could screw up by interfering with a new request being set up for 
+ *	irq15.
+ *
+ *	In reality, this is a non-issue.  The new command is not sent unless 
+ *	the drive is ready to accept one, in which case we know the drive is
+ *	not trying to interrupt us.  And ide_set_handler() is always invoked
+ *	before completing the issuance of any new drive command, so we will not
+ *	be accidentally invoked as a result of any valid command completion
+ *	interrupt.
+ */
+
+static void unexpected_intr(int irq, ide_hwif_t *hwif)
+{
+	u8 stat = hwif->tp_ops->read_status(hwif);
+
+	if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
+		/* Try to not flood the console with msgs */
+		static unsigned long last_msgtime, count;
+		++count;
+
+		if (time_after(jiffies, last_msgtime + HZ)) {
+			last_msgtime = jiffies;
+			printk(KERN_ERR "%s: unexpected interrupt, "
+				"status=0x%02x, count=%ld\n",
+				hwif->name, stat, count);
+		}
+	}
+}
+
+/**
+ *	ide_intr	-	default IDE interrupt handler
+ *	@irq: interrupt number
+ *	@dev_id: hwif
+ *	@regs: unused weirdness from the kernel irq layer
+ *
+ *	This is the default IRQ handler for the IDE layer. You should
+ *	not need to override it. If you do be aware it is subtle in
+ *	places
+ *
+ *	hwif is the interface in the group currently performing
+ *	a command. hwif->cur_dev is the drive and hwif->handler is
+ *	the IRQ handler to call. As we issue a command the handlers
+ *	step through multiple states, reassigning the handler to the
+ *	next step in the process. Unlike a smart SCSI controller IDE
+ *	expects the main processor to sequence the various transfer
+ *	stages. We also manage a poll timer to catch up with most
+ *	timeout situations. There are still a few where the handlers
+ *	don't ever decide to give up.
+ *
+ *	The handler eventually returns ide_stopped to indicate the
+ *	request completed. At this point we issue the next request
+ *	on the port and the process begins again.
+ */
+
+irqreturn_t ide_intr (int irq, void *dev_id)
+{
+	ide_hwif_t *hwif = (ide_hwif_t *)dev_id;
+	struct ide_host *host = hwif->host;
+	ide_drive_t *drive;
+	ide_handler_t *handler;
+	unsigned long flags;
+	ide_startstop_t startstop;
+	irqreturn_t irq_ret = IRQ_NONE;
+	int plug_device = 0;
+	struct request *rq_in_flight;
+
+	if (host->host_flags & IDE_HFLAG_SERIALIZE) {
+		if (hwif != host->cur_port)
+			goto out_early;
+	}
+
+	spin_lock_irqsave(&hwif->lock, flags);
+
+	if (hwif->port_ops && hwif->port_ops->test_irq &&
+	    hwif->port_ops->test_irq(hwif) == 0)
+		goto out;
+
+	handler = hwif->handler;
+
+	if (handler == NULL || hwif->polling) {
+		/*
+		 * Not expecting an interrupt from this drive.
+		 * That means this could be:
+		 *	(1) an interrupt from another PCI device
+		 *	sharing the same PCI INT# as us.
+		 * or	(2) a drive just entered sleep or standby mode,
+		 *	and is interrupting to let us know.
+		 * or	(3) a spurious interrupt of unknown origin.
+		 *
+		 * For PCI, we cannot tell the difference,
+		 * so in that case we just ignore it and hope it goes away.
+		 */
+		if ((host->irq_flags & IRQF_SHARED) == 0) {
+			/*
+			 * Probably not a shared PCI interrupt,
+			 * so we can safely try to do something about it:
+			 */
+			unexpected_intr(irq, hwif);
+		} else {
+			/*
+			 * Whack the status register, just in case
+			 * we have a leftover pending IRQ.
+			 */
+			(void)hwif->tp_ops->read_status(hwif);
+		}
+		goto out;
+	}
+
+	drive = hwif->cur_dev;
+
+	if (!drive_is_ready(drive))
+		/*
+		 * This happens regularly when we share a PCI IRQ with
+		 * another device.  Unfortunately, it can also happen
+		 * with some buggy drives that trigger the IRQ before
+		 * their status register is up to date.  Hopefully we have
+		 * enough advance overhead that the latter isn't a problem.
+		 */
+		goto out;
+
+	hwif->handler = NULL;
+	hwif->expiry = NULL;
+	hwif->req_gen++;
+	del_timer(&hwif->timer);
+	spin_unlock(&hwif->lock);
+
+	if (hwif->port_ops && hwif->port_ops->clear_irq)
+		hwif->port_ops->clear_irq(drive);
+
+	if (drive->dev_flags & IDE_DFLAG_UNMASK)
+		local_irq_enable_in_hardirq();
+
+	/* service this interrupt, may set handler for next interrupt */
+	startstop = handler(drive);
+
+	spin_lock_irq(&hwif->lock);
+	/*
+	 * Note that handler() may have set things up for another
+	 * interrupt to occur soon, but it cannot happen until
+	 * we exit from this routine, because it will be the
+	 * same irq as is currently being serviced here, and Linux
+	 * won't allow another of the same (on any CPU) until we return.
+	 */
+	if (startstop == ide_stopped && hwif->polling == 0) {
+		BUG_ON(hwif->handler);
+		rq_in_flight = hwif->rq;
+		hwif->rq = NULL;
+		ide_unlock_port(hwif);
+		plug_device = 1;
+	}
+	irq_ret = IRQ_HANDLED;
+out:
+	spin_unlock_irqrestore(&hwif->lock, flags);
+out_early:
+	if (plug_device) {
+		ide_unlock_host(hwif->host);
+		ide_requeue_and_plug(drive, rq_in_flight);
+	}
+
+	return irq_ret;
+}
+EXPORT_SYMBOL_GPL(ide_intr);
+
+void ide_pad_transfer(ide_drive_t *drive, int write, int len)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 buf[4] = { 0 };
+
+	while (len > 0) {
+		if (write)
+			hwif->tp_ops->output_data(drive, NULL, buf, min(4, len));
+		else
+			hwif->tp_ops->input_data(drive, NULL, buf, min(4, len));
+		len -= 4;
+	}
+}
+EXPORT_SYMBOL_GPL(ide_pad_transfer);
+
+void ide_insert_request_head(ide_drive_t *drive, struct request *rq)
+{
+	drive->sense_rq_active = true;
+	list_add_tail(&rq->queuelist, &drive->rq_list);
+	kblockd_schedule_work(&drive->rq_work);
+}
+EXPORT_SYMBOL_GPL(ide_insert_request_head);
diff --git a/drivers/ide/ide-ioctls.c b/drivers/ide/ide-ioctls.c
new file mode 100644
index 000000000..58994da10
--- /dev/null
+++ b/drivers/ide/ide-ioctls.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IDE ioctls handling.
+ */
+
+#include <linux/compat.h>
+#include <linux/export.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/slab.h>
+
+static int put_user_long(long val, unsigned long arg)
+{
+	if (in_compat_syscall())
+		return put_user(val, (compat_long_t __user *)compat_ptr(arg));
+
+	return put_user(val, (long __user *)arg);
+}
+
+static const struct ide_ioctl_devset ide_ioctl_settings[] = {
+{ HDIO_GET_32BIT,	 HDIO_SET_32BIT,	&ide_devset_io_32bit  },
+{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS,	&ide_devset_keepsettings },
+{ HDIO_GET_UNMASKINTR,	 HDIO_SET_UNMASKINTR,	&ide_devset_unmaskirq },
+{ HDIO_GET_DMA,		 HDIO_SET_DMA,		&ide_devset_using_dma },
+{ -1,			 HDIO_SET_PIO_MODE,	&ide_devset_pio_mode  },
+{ 0 }
+};
+
+int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev,
+		      unsigned int cmd, unsigned long arg,
+		      const struct ide_ioctl_devset *s)
+{
+	const struct ide_devset *ds;
+	int err = -EOPNOTSUPP;
+
+	for (; (ds = s->setting); s++) {
+		if (ds->get && s->get_ioctl == cmd)
+			goto read_val;
+		else if (ds->set && s->set_ioctl == cmd)
+			goto set_val;
+	}
+
+	return err;
+
+read_val:
+	mutex_lock(&ide_setting_mtx);
+	err = ds->get(drive);
+	mutex_unlock(&ide_setting_mtx);
+	return err >= 0 ? put_user_long(err, arg) : err;
+
+set_val:
+	if (bdev_is_partition(bdev))
+		err = -EINVAL;
+	else {
+		if (!capable(CAP_SYS_ADMIN))
+			err = -EACCES;
+		else {
+			mutex_lock(&ide_setting_mtx);
+			err = ide_devset_execute(drive, ds, arg);
+			mutex_unlock(&ide_setting_mtx);
+		}
+	}
+	return err;
+}
+EXPORT_SYMBOL_GPL(ide_setting_ioctl);
+
+static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd,
+				  void __user *argp)
+{
+	u16 *id = NULL;
+	int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142;
+	int rc = 0;
+
+	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
+		rc = -ENOMSG;
+		goto out;
+	}
+
+	/* ata_id_to_hd_driveid() relies on 'id' to be fully allocated. */
+	id = kmalloc(ATA_ID_WORDS * 2, GFP_KERNEL);
+	if (id == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	memcpy(id, drive->id, size);
+	ata_id_to_hd_driveid(id);
+
+	if (copy_to_user(argp, id, size))
+		rc = -EFAULT;
+
+	kfree(id);
+out:
+	return rc;
+}
+
+static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg)
+{
+	return put_user_long((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP)
+			 << IDE_NICE_DSC_OVERLAP) |
+			(!!(drive->dev_flags & IDE_DFLAG_NICE1)
+			 << IDE_NICE_1), arg);
+}
+
+static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
+{
+	if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
+		return -EPERM;
+
+	if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) &&
+	    (drive->media != ide_tape))
+		return -EPERM;
+
+	if ((arg >> IDE_NICE_DSC_OVERLAP) & 1)
+		drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+
+	if ((arg >> IDE_NICE_1) & 1)
+		drive->dev_flags |= IDE_DFLAG_NICE1;
+	else
+		drive->dev_flags &= ~IDE_DFLAG_NICE1;
+
+	return 0;
+}
+
+static int ide_cmd_ioctl(ide_drive_t *drive, void __user *argp)
+{
+	u8 *buf = NULL;
+	int bufsize = 0, err = 0;
+	u8 args[4], xfer_rate = 0;
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+
+	if (NULL == argp) {
+		struct request *rq;
+
+		rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+		ide_req(rq)->type = ATA_PRIV_TASKFILE;
+		blk_execute_rq(drive->queue, NULL, rq, 0);
+		err = scsi_req(rq)->result ? -EIO : 0;
+		blk_put_request(rq);
+
+		return err;
+	}
+
+	if (copy_from_user(args, argp, 4))
+		return -EFAULT;
+
+	memset(&cmd, 0, sizeof(cmd));
+	tf->feature = args[2];
+	if (args[0] == ATA_CMD_SMART) {
+		tf->nsect = args[3];
+		tf->lbal  = args[1];
+		tf->lbam  = ATA_SMART_LBAM_PASS;
+		tf->lbah  = ATA_SMART_LBAH_PASS;
+		cmd.valid.out.tf = IDE_VALID_OUT_TF;
+		cmd.valid.in.tf  = IDE_VALID_NSECT;
+	} else {
+		tf->nsect = args[1];
+		cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
+		cmd.valid.in.tf  = IDE_VALID_NSECT;
+	}
+	tf->command = args[0];
+	cmd.protocol = args[3] ? ATA_PROT_PIO : ATA_PROT_NODATA;
+
+	if (args[3]) {
+		cmd.tf_flags |= IDE_TFLAG_IO_16BIT;
+		bufsize = SECTOR_SIZE * args[3];
+		buf = kzalloc(bufsize, GFP_KERNEL);
+		if (buf == NULL)
+			return -ENOMEM;
+	}
+
+	if (tf->command == ATA_CMD_SET_FEATURES &&
+	    tf->feature == SETFEATURES_XFER &&
+	    tf->nsect >= XFER_SW_DMA_0) {
+		xfer_rate = ide_find_dma_mode(drive, tf->nsect);
+		if (xfer_rate != tf->nsect) {
+			err = -EINVAL;
+			goto abort;
+		}
+
+		cmd.tf_flags |= IDE_TFLAG_SET_XFER;
+	}
+
+	err = ide_raw_taskfile(drive, &cmd, buf, args[3]);
+
+	args[0] = tf->status;
+	args[1] = tf->error;
+	args[2] = tf->nsect;
+abort:
+	if (copy_to_user(argp, &args, 4))
+		err = -EFAULT;
+	if (buf) {
+		if (copy_to_user((argp + 4), buf, bufsize))
+			err = -EFAULT;
+		kfree(buf);
+	}
+	return err;
+}
+
+static int ide_task_ioctl(ide_drive_t *drive, void __user *p)
+{
+	int err = 0;
+	u8 args[7];
+	struct ide_cmd cmd;
+
+	if (copy_from_user(args, p, 7))
+		return -EFAULT;
+
+	memset(&cmd, 0, sizeof(cmd));
+	memcpy(&cmd.tf.feature, &args[1], 6);
+	cmd.tf.command = args[0];
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+
+	err = ide_no_data_taskfile(drive, &cmd);
+
+	args[0] = cmd.tf.command;
+	memcpy(&args[1], &cmd.tf.feature, 6);
+
+	if (copy_to_user(p, args, 7))
+		err = -EFAULT;
+
+	return err;
+}
+
+static int generic_drive_reset(ide_drive_t *drive)
+{
+	struct request *rq;
+	int ret = 0;
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	scsi_req(rq)->cmd_len = 1;
+	scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
+	blk_execute_rq(drive->queue, NULL, rq, 1);
+	ret = scsi_req(rq)->result;
+	blk_put_request(rq);
+	return ret;
+}
+
+int generic_ide_ioctl(ide_drive_t *drive, struct block_device *bdev,
+		      unsigned int cmd, unsigned long arg)
+{
+	int err;
+	void __user *argp = (void __user *)arg;
+
+	if (in_compat_syscall())
+		argp = compat_ptr(arg);
+
+	err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
+	if (err != -EOPNOTSUPP)
+		return err;
+
+	switch (cmd) {
+	case HDIO_OBSOLETE_IDENTITY:
+	case HDIO_GET_IDENTITY:
+		if (bdev_is_partition(bdev))
+			return -EINVAL;
+		return ide_get_identity_ioctl(drive, cmd, argp);
+	case HDIO_GET_NICE:
+		return ide_get_nice_ioctl(drive, arg);
+	case HDIO_SET_NICE:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+		return ide_set_nice_ioctl(drive, arg);
+#ifdef CONFIG_IDE_TASK_IOCTL
+	case HDIO_DRIVE_TASKFILE:
+		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
+			return -EACCES;
+		/* missing compat handler for HDIO_DRIVE_TASKFILE */
+		if (in_compat_syscall())
+			return -ENOTTY;
+		if (drive->media == ide_disk)
+			return ide_taskfile_ioctl(drive, arg);
+		return -ENOMSG;
+#endif
+	case HDIO_DRIVE_CMD:
+		if (!capable(CAP_SYS_RAWIO))
+			return -EACCES;
+		return ide_cmd_ioctl(drive, argp);
+	case HDIO_DRIVE_TASK:
+		if (!capable(CAP_SYS_RAWIO))
+			return -EACCES;
+		return ide_task_ioctl(drive, argp);
+	case HDIO_DRIVE_RESET:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+		return generic_drive_reset(drive);
+	case HDIO_GET_BUSSTATE:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+		if (put_user_long(BUSSTATE_ON, arg))
+			return -EFAULT;
+		return 0;
+	case HDIO_SET_BUSSTATE:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+		return -EOPNOTSUPP;
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL(generic_ide_ioctl);
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
new file mode 100644
index 000000000..f2be127ee
--- /dev/null
+++ b/drivers/ide/ide-iops.c
@@ -0,0 +1,536 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2000-2002	Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003		Red Hat
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/blkpg.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+#include <linux/nmi.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+void SELECT_MASK(ide_drive_t *drive, int mask)
+{
+	const struct ide_port_ops *port_ops = drive->hwif->port_ops;
+
+	if (port_ops && port_ops->maskproc)
+		port_ops->maskproc(drive, mask);
+}
+
+u8 ide_read_error(ide_drive_t *drive)
+{
+	struct ide_taskfile tf;
+
+	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);
+
+	return tf.error;
+}
+EXPORT_SYMBOL_GPL(ide_read_error);
+
+void ide_fix_driveid(u16 *id)
+{
+#ifndef __LITTLE_ENDIAN
+# ifdef __BIG_ENDIAN
+	int i;
+
+	for (i = 0; i < 256; i++)
+		id[i] = __le16_to_cpu(id[i]);
+# else
+#  error "Please fix <asm/byteorder.h>"
+# endif
+#endif
+}
+
+/*
+ * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
+ * removing leading/trailing blanks and compressing internal blanks.
+ * It is primarily used to tidy up the model name/number fields as
+ * returned by the ATA_CMD_ID_ATA[PI] commands.
+ */
+
+void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
+{
+	u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
+
+	if (byteswap) {
+		/* convert from big-endian to host byte order */
+		for (p = s ; p != end ; p += 2)
+			be16_to_cpus((u16 *) p);
+	}
+
+	/* strip leading blanks */
+	p = s;
+	while (s != end && *s == ' ')
+		++s;
+	/* compress internal blanks and strip trailing blanks */
+	while (s != end && *s) {
+		if (*s++ != ' ' || (s != end && *s && *s != ' '))
+			*p++ = *(s-1);
+	}
+	/* wipe out trailing garbage */
+	while (p != end)
+		*p++ = '\0';
+}
+EXPORT_SYMBOL(ide_fixstring);
+
+/*
+ * This routine busy-waits for the drive status to be not "busy".
+ * It then checks the status for all of the "good" bits and none
+ * of the "bad" bits, and if all is okay it returns 0.  All other
+ * cases return error -- caller may then invoke ide_error().
+ *
+ * This routine should get fixed to not hog the cpu during extra long waits..
+ * That could be done by busy-waiting for the first jiffy or two, and then
+ * setting a timer to wake up at half second intervals thereafter,
+ * until timeout is achieved, before timing out.
+ */
+int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
+		    unsigned long timeout, u8 *rstat)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	unsigned long flags;
+	bool irqs_threaded = force_irqthreads;
+	int i;
+	u8 stat;
+
+	udelay(1);	/* spec allows drive 400ns to assert "BUSY" */
+	stat = tp_ops->read_status(hwif);
+
+	if (stat & ATA_BUSY) {
+		if (!irqs_threaded) {
+			local_save_flags(flags);
+			local_irq_enable_in_hardirq();
+		}
+		timeout += jiffies;
+		while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
+			if (time_after(jiffies, timeout)) {
+				/*
+				 * One last read after the timeout in case
+				 * heavy interrupt load made us not make any
+				 * progress during the timeout..
+				 */
+				stat = tp_ops->read_status(hwif);
+				if ((stat & ATA_BUSY) == 0)
+					break;
+
+				if (!irqs_threaded)
+					local_irq_restore(flags);
+				*rstat = stat;
+				return -EBUSY;
+			}
+		}
+		if (!irqs_threaded)
+			local_irq_restore(flags);
+	}
+	/*
+	 * Allow status to settle, then read it again.
+	 * A few rare drives vastly violate the 400ns spec here,
+	 * so we'll wait up to 10usec for a "good" status
+	 * rather than expensively fail things immediately.
+	 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
+	 */
+	for (i = 0; i < 10; i++) {
+		udelay(1);
+		stat = tp_ops->read_status(hwif);
+
+		if (OK_STAT(stat, good, bad)) {
+			*rstat = stat;
+			return 0;
+		}
+	}
+	*rstat = stat;
+	return -EFAULT;
+}
+
+/*
+ * In case of error returns error value after doing "*startstop = ide_error()".
+ * The caller should return the updated value of "startstop" in this case,
+ * "startstop" is unchanged when the function returns 0.
+ */
+int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
+		  u8 bad, unsigned long timeout)
+{
+	int err;
+	u8 stat;
+
+	/* bail early if we've exceeded max_failures */
+	if (drive->max_failures && (drive->failures > drive->max_failures)) {
+		*startstop = ide_stopped;
+		return 1;
+	}
+
+	err = __ide_wait_stat(drive, good, bad, timeout, &stat);
+
+	if (err) {
+		char *s = (err == -EBUSY) ? "status timeout" : "status error";
+		*startstop = ide_error(drive, s, stat);
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(ide_wait_stat);
+
+/**
+ *	ide_in_drive_list	-	look for drive in black/white list
+ *	@id: drive identifier
+ *	@table: list to inspect
+ *
+ *	Look for a drive in the blacklist and the whitelist tables
+ *	Returns 1 if the drive is found in the table.
+ */
+
+int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
+{
+	for ( ; table->id_model; table++)
+		if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
+		    (!table->id_firmware ||
+		     strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
+			return 1;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_in_drive_list);
+
+/*
+ * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
+ * Some optical devices with the buggy firmwares have the same problem.
+ */
+static const struct drive_list_entry ivb_list[] = {
+	{ "QUANTUM FIREBALLlct10 05"	, "A03.0900"	},
+	{ "QUANTUM FIREBALLlct20 30"	, "APL.0900"	},
+	{ "TSSTcorp CDDVDW SH-S202J"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202J"	, "SB01"	},
+	{ "TSSTcorp CDDVDW SH-S202N"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202N"	, "SB01"	},
+	{ "TSSTcorp CDDVDW SH-S202H"	, "SB00"	},
+	{ "TSSTcorp CDDVDW SH-S202H"	, "SB01"	},
+	{ "SAMSUNG SP0822N"		, "WA100-10"	},
+	{ NULL				, NULL		}
+};
+
+/*
+ *  All hosts that use the 80c ribbon must use!
+ *  The name is derived from upper byte of word 93 and the 80c ribbon.
+ */
+u8 eighty_ninty_three(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u16 *id = drive->id;
+	int ivb = ide_in_drive_list(id, ivb_list);
+
+	if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT)
+		return 1;
+
+	if (ivb)
+		printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
+				  drive->name);
+
+	if (ata_id_is_sata(id) && !ivb)
+		return 1;
+
+	if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
+		goto no_80w;
+
+	/*
+	 * FIXME:
+	 * - change master/slave IDENTIFY order
+	 * - force bit13 (80c cable present) check also for !ivb devices
+	 *   (unless the slave device is pre-ATA3)
+	 */
+	if (id[ATA_ID_HW_CONFIG] & 0x4000)
+		return 1;
+
+	if (ivb) {
+		const char *model = (char *)&id[ATA_ID_PROD];
+
+		if (strstr(model, "TSSTcorp CDDVDW SH-S202")) {
+			/*
+			 * These ATAPI devices always report 80c cable
+			 * so we have to depend on the host in this case.
+			 */
+			if (hwif->cbl == ATA_CBL_PATA80)
+				return 1;
+		} else {
+			/* Depend on the device side cable detection. */
+			if (id[ATA_ID_HW_CONFIG] & 0x2000)
+				return 1;
+		}
+	}
+no_80w:
+	if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
+		return 0;
+
+	printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
+			    "limiting max speed to UDMA33\n",
+			    drive->name,
+			    hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
+
+	drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
+
+	return 0;
+}
+
+static const char *nien_quirk_list[] = {
+	"QUANTUM FIREBALLlct08 08",
+	"QUANTUM FIREBALLP KA6.4",
+	"QUANTUM FIREBALLP KA9.1",
+	"QUANTUM FIREBALLP KX13.6",
+	"QUANTUM FIREBALLP KX20.5",
+	"QUANTUM FIREBALLP KX27.3",
+	"QUANTUM FIREBALLP LM20.4",
+	"QUANTUM FIREBALLP LM20.5",
+	"FUJITSU MHZ2160BH G2",
+	NULL
+};
+
+void ide_check_nien_quirk_list(ide_drive_t *drive)
+{
+	const char **list, *m = (char *)&drive->id[ATA_ID_PROD];
+
+	for (list = nien_quirk_list; *list != NULL; list++)
+		if (strstr(m, *list) != NULL) {
+			drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK;
+			return;
+		}
+}
+
+int ide_driveid_update(ide_drive_t *drive)
+{
+	u16 *id;
+	int rc;
+
+	id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
+	if (id == NULL)
+		return 0;
+
+	SELECT_MASK(drive, 1);
+	rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1);
+	SELECT_MASK(drive, 0);
+
+	if (rc)
+		goto out_err;
+
+	drive->id[ATA_ID_UDMA_MODES]  = id[ATA_ID_UDMA_MODES];
+	drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
+	drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
+	drive->id[ATA_ID_CFA_MODES]   = id[ATA_ID_CFA_MODES];
+	/* anything more ? */
+
+	kfree(id);
+
+	return 1;
+out_err:
+	if (rc == 2)
+		printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
+	kfree(id);
+	return 0;
+}
+
+int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	struct ide_taskfile tf;
+	u16 *id = drive->id, i;
+	int error = 0;
+	u8 stat;
+
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	if (hwif->dma_ops)	/* check if host supports DMA */
+		hwif->dma_ops->dma_host_set(drive, 0);
+#endif
+
+	/* Skip setting PIO flow-control modes on pre-EIDE drives */
+	if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
+		goto skip;
+
+	/*
+	 * Don't use ide_wait_cmd here - it will
+	 * attempt to set_geometry and recalibrate,
+	 * but for some reason these don't work at
+	 * this point (lost interrupt).
+	 */
+
+	udelay(1);
+	tp_ops->dev_select(drive);
+	SELECT_MASK(drive, 1);
+	udelay(1);
+	tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
+
+	memset(&tf, 0, sizeof(tf));
+	tf.feature = SETFEATURES_XFER;
+	tf.nsect   = speed;
+
+	tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT);
+
+	tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
+
+	if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK)
+		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+	error = __ide_wait_stat(drive, drive->ready_stat,
+				ATA_BUSY | ATA_DRQ | ATA_ERR,
+				WAIT_CMD, &stat);
+
+	SELECT_MASK(drive, 0);
+
+	if (error) {
+		(void) ide_dump_status(drive, "set_drive_speed_status", stat);
+		return error;
+	}
+
+	if (speed >= XFER_SW_DMA_0) {
+		id[ATA_ID_UDMA_MODES]  &= ~0xFF00;
+		id[ATA_ID_MWDMA_MODES] &= ~0x0700;
+		id[ATA_ID_SWDMA_MODES] &= ~0x0700;
+		if (ata_id_is_cfa(id))
+			id[ATA_ID_CFA_MODES] &= ~0x0E00;
+	} else	if (ata_id_is_cfa(id))
+		id[ATA_ID_CFA_MODES] &= ~0x01C0;
+
+ skip:
+#ifdef CONFIG_BLK_DEV_IDEDMA
+	if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
+		hwif->dma_ops->dma_host_set(drive, 1);
+	else if (hwif->dma_ops)	/* check if host supports DMA */
+		ide_dma_off_quietly(drive);
+#endif
+
+	if (speed >= XFER_UDMA_0) {
+		i = 1 << (speed - XFER_UDMA_0);
+		id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
+	} else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
+		i = speed - XFER_MW_DMA_2;
+		id[ATA_ID_CFA_MODES] |= i << 9;
+	} else if (speed >= XFER_MW_DMA_0) {
+		i = 1 << (speed - XFER_MW_DMA_0);
+		id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
+	} else if (speed >= XFER_SW_DMA_0) {
+		i = 1 << (speed - XFER_SW_DMA_0);
+		id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
+	} else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
+		i = speed - XFER_PIO_4;
+		id[ATA_ID_CFA_MODES] |= i << 6;
+	}
+
+	if (!drive->init_speed)
+		drive->init_speed = speed;
+	drive->current_speed = speed;
+	return error;
+}
+
+/*
+ * This should get invoked any time we exit the driver to
+ * wait for an interrupt response from a drive.  handler() points
+ * at the appropriate code to handle the next interrupt, and a
+ * timer is started to prevent us from waiting forever in case
+ * something goes wrong (see the ide_timer_expiry() handler later on).
+ *
+ * See also ide_execute_command
+ */
+void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+		       unsigned int timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	BUG_ON(hwif->handler);
+	hwif->handler		= handler;
+	hwif->timer.expires	= jiffies + timeout;
+	hwif->req_gen_timer	= hwif->req_gen;
+	add_timer(&hwif->timer);
+}
+
+void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+		     unsigned int timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+	__ide_set_handler(drive, handler, timeout);
+	spin_unlock_irqrestore(&hwif->lock, flags);
+}
+EXPORT_SYMBOL(ide_set_handler);
+
+/**
+ *	ide_execute_command	-	execute an IDE command
+ *	@drive: IDE drive to issue the command against
+ *	@cmd: command
+ *	@handler: handler for next phase
+ *	@timeout: timeout for command
+ *
+ *	Helper function to issue an IDE command. This handles the
+ *	atomicity requirements, command timing and ensures that the
+ *	handler and IRQ setup do not race. All IDE command kick off
+ *	should go via this function or do equivalent locking.
+ */
+
+void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
+			 ide_handler_t *handler, unsigned timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long flags;
+
+	spin_lock_irqsave(&hwif->lock, flags);
+	if ((cmd->protocol != ATAPI_PROT_DMA &&
+	     cmd->protocol != ATAPI_PROT_PIO) ||
+	    (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
+		__ide_set_handler(drive, handler, timeout);
+	hwif->tp_ops->exec_command(hwif, cmd->tf.command);
+	/*
+	 * Drive takes 400nS to respond, we must avoid the IRQ being
+	 * serviced before that.
+	 *
+	 * FIXME: we could skip this delay with care on non shared devices
+	 */
+	ndelay(400);
+	spin_unlock_irqrestore(&hwif->lock, flags);
+}
+
+/*
+ * ide_wait_not_busy() waits for the currently selected device on the hwif
+ * to report a non-busy status, see comments in ide_probe_port().
+ */
+int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
+{
+	u8 stat = 0;
+
+	while (timeout--) {
+		/*
+		 * Turn this into a schedule() sleep once I'm sure
+		 * about locking issues (2.5 work ?).
+		 */
+		mdelay(1);
+		stat = hwif->tp_ops->read_status(hwif);
+		if ((stat & ATA_BUSY) == 0)
+			return 0;
+		/*
+		 * Assume a value of 0xff means nothing is connected to
+		 * the interface and it doesn't implement the pull-down
+		 * resistor on D7.
+		 */
+		if (stat == 0xff)
+			return -ENODEV;
+		touch_nmi_watchdog();
+	}
+	return -EBUSY;
+}
diff --git a/drivers/ide/ide-legacy.c b/drivers/ide/ide-legacy.c
new file mode 100644
index 000000000..be65b411a
--- /dev/null
+++ b/drivers/ide/ide-legacy.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/ide.h>
+
+static void ide_legacy_init_one(struct ide_hw **hws, struct ide_hw *hw,
+				u8 port_no, const struct ide_port_info *d,
+				unsigned long config)
+{
+	unsigned long base, ctl;
+	int irq;
+
+	if (port_no == 0) {
+		base = 0x1f0;
+		ctl  = 0x3f6;
+		irq  = 14;
+	} else {
+		base = 0x170;
+		ctl  = 0x376;
+		irq  = 15;
+	}
+
+	if (!request_region(base, 8, d->name)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				d->name, base, base + 7);
+		return;
+	}
+
+	if (!request_region(ctl, 1, d->name)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+				d->name, ctl);
+		release_region(base, 8);
+		return;
+	}
+
+	ide_std_init_ports(hw, base, ctl);
+	hw->irq = irq;
+	hw->config = config;
+
+	hws[port_no] = hw;
+}
+
+int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
+{
+	struct ide_hw hw[2], *hws[] = { NULL, NULL };
+
+	memset(&hw, 0, sizeof(hw));
+
+	if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
+		ide_legacy_init_one(hws, &hw[0], 0, d, config);
+	ide_legacy_init_one(hws, &hw[1], 1, d, config);
+
+	if (hws[0] == NULL && hws[1] == NULL &&
+	    (d->host_flags & IDE_HFLAG_SINGLE))
+		return -ENOENT;
+
+	return ide_host_add(d, hws, 2, NULL);
+}
+EXPORT_SYMBOL_GPL(ide_legacy_device_add);
diff --git a/drivers/ide/ide-lib.c b/drivers/ide/ide-lib.c
new file mode 100644
index 000000000..7b9f655ad
--- /dev/null
+++ b/drivers/ide/ide-lib.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+
+u64 ide_get_lba_addr(struct ide_cmd *cmd, int lba48)
+{
+	struct ide_taskfile *tf = &cmd->tf;
+	u32 high, low;
+
+	low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
+	if (lba48) {
+		tf = &cmd->hob;
+		high = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
+	} else
+		high = tf->device & 0xf;
+
+	return ((u64)high << 24) | low;
+}
+EXPORT_SYMBOL_GPL(ide_get_lba_addr);
+
+static void ide_dump_sector(ide_drive_t *drive)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+	u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (lba48) {
+		cmd.valid.in.tf  = IDE_VALID_LBA;
+		cmd.valid.in.hob = IDE_VALID_LBA;
+		cmd.tf_flags = IDE_TFLAG_LBA48;
+	} else
+		cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;
+
+	ide_tf_readback(drive, &cmd);
+
+	if (lba48 || (tf->device & ATA_LBA))
+		printk(KERN_CONT ", LBAsect=%llu",
+			(unsigned long long)ide_get_lba_addr(&cmd, lba48));
+	else
+		printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
+			tf->device & 0xf, tf->lbal);
+}
+
+static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
+{
+	printk(KERN_CONT "{ ");
+	if (err & ATA_ABORTED)
+		printk(KERN_CONT "DriveStatusError ");
+	if (err & ATA_ICRC)
+		printk(KERN_CONT "%s",
+			(err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
+	if (err & ATA_UNC)
+		printk(KERN_CONT "UncorrectableError ");
+	if (err & ATA_IDNF)
+		printk(KERN_CONT "SectorIdNotFound ");
+	if (err & ATA_TRK0NF)
+		printk(KERN_CONT "TrackZeroNotFound ");
+	if (err & ATA_AMNF)
+		printk(KERN_CONT "AddrMarkNotFound ");
+	printk(KERN_CONT "}");
+	if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
+	    (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
+		struct request *rq = drive->hwif->rq;
+
+		ide_dump_sector(drive);
+
+		if (rq)
+			printk(KERN_CONT ", sector=%llu",
+			       (unsigned long long)blk_rq_pos(rq));
+	}
+	printk(KERN_CONT "\n");
+}
+
+static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
+{
+	printk(KERN_CONT "{ ");
+	if (err & ATAPI_ILI)
+		printk(KERN_CONT "IllegalLengthIndication ");
+	if (err & ATAPI_EOM)
+		printk(KERN_CONT "EndOfMedia ");
+	if (err & ATA_ABORTED)
+		printk(KERN_CONT "AbortedCommand ");
+	if (err & ATA_MCR)
+		printk(KERN_CONT "MediaChangeRequested ");
+	if (err & ATAPI_LFS)
+		printk(KERN_CONT "LastFailedSense=0x%02x ",
+			(err & ATAPI_LFS) >> 4);
+	printk(KERN_CONT "}\n");
+}
+
+/**
+ *	ide_dump_status		-	translate ATA/ATAPI error
+ *	@drive: drive that status applies to
+ *	@msg: text message to print
+ *	@stat: status byte to decode
+ *
+ *	Error reporting, in human readable form (luxurious, but a memory hog).
+ *	Combines the drive name, message and status byte to provide a
+ *	user understandable explanation of the device error.
+ */
+
+u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
+{
+	u8 err = 0;
+
+	printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
+	if (stat & ATA_BUSY)
+		printk(KERN_CONT "Busy ");
+	else {
+		if (stat & ATA_DRDY)
+			printk(KERN_CONT "DriveReady ");
+		if (stat & ATA_DF)
+			printk(KERN_CONT "DeviceFault ");
+		if (stat & ATA_DSC)
+			printk(KERN_CONT "SeekComplete ");
+		if (stat & ATA_DRQ)
+			printk(KERN_CONT "DataRequest ");
+		if (stat & ATA_CORR)
+			printk(KERN_CONT "CorrectedError ");
+		if (stat & ATA_SENSE)
+			printk(KERN_CONT "Sense ");
+		if (stat & ATA_ERR)
+			printk(KERN_CONT "Error ");
+	}
+	printk(KERN_CONT "}\n");
+	if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
+		err = ide_read_error(drive);
+		printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
+		if (drive->media == ide_disk)
+			ide_dump_ata_error(drive, err);
+		else
+			ide_dump_atapi_error(drive, err);
+	}
+
+	printk(KERN_ERR "%s: possibly failed opcode: 0x%02x\n",
+		drive->name, drive->hwif->cmd.tf.command);
+
+	return err;
+}
+EXPORT_SYMBOL(ide_dump_status);
diff --git a/drivers/ide/ide-park.c b/drivers/ide/ide-park.c
new file mode 100644
index 000000000..8af7af600
--- /dev/null
+++ b/drivers/ide/ide-park.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/gfp.h>
+#include <linux/ide.h>
+#include <linux/jiffies.h>
+#include <linux/blkdev.h>
+
+DECLARE_WAIT_QUEUE_HEAD(ide_park_wq);
+
+static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct request_queue *q = drive->queue;
+	struct request *rq;
+	int rc;
+
+	timeout += jiffies;
+	spin_lock_irq(&hwif->lock);
+	if (drive->dev_flags & IDE_DFLAG_PARKED) {
+		int reset_timer = time_before(timeout, drive->sleep);
+		int start_queue = 0;
+
+		drive->sleep = timeout;
+		wake_up_all(&ide_park_wq);
+		if (reset_timer && del_timer(&hwif->timer))
+			start_queue = 1;
+		spin_unlock_irq(&hwif->lock);
+
+		if (start_queue)
+			blk_mq_run_hw_queues(q, true);
+		return;
+	}
+	spin_unlock_irq(&hwif->lock);
+
+	rq = blk_get_request(q, REQ_OP_DRV_IN, 0);
+	scsi_req(rq)->cmd[0] = REQ_PARK_HEADS;
+	scsi_req(rq)->cmd_len = 1;
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	ide_req(rq)->special = &timeout;
+	blk_execute_rq(q, NULL, rq, 1);
+	rc = scsi_req(rq)->result ? -EIO : 0;
+	blk_put_request(rq);
+	if (rc)
+		goto out;
+
+	/*
+	 * Make sure that *some* command is sent to the drive after the
+	 * timeout has expired, so power management will be reenabled.
+	 */
+	rq = blk_get_request(q, REQ_OP_DRV_IN, BLK_MQ_REQ_NOWAIT);
+	if (IS_ERR(rq))
+		goto out;
+
+	scsi_req(rq)->cmd[0] = REQ_UNPARK_HEADS;
+	scsi_req(rq)->cmd_len = 1;
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	spin_lock_irq(&hwif->lock);
+	ide_insert_request_head(drive, rq);
+	spin_unlock_irq(&hwif->lock);
+
+out:
+	return;
+}
+
+ide_startstop_t ide_do_park_unpark(ide_drive_t *drive, struct request *rq)
+{
+	struct ide_cmd cmd;
+	struct ide_taskfile *tf = &cmd.tf;
+
+	memset(&cmd, 0, sizeof(cmd));
+	if (scsi_req(rq)->cmd[0] == REQ_PARK_HEADS) {
+		drive->sleep = *(unsigned long *)ide_req(rq)->special;
+		drive->dev_flags |= IDE_DFLAG_SLEEPING;
+		tf->command = ATA_CMD_IDLEIMMEDIATE;
+		tf->feature = 0x44;
+		tf->lbal = 0x4c;
+		tf->lbam = 0x4e;
+		tf->lbah = 0x55;
+		cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+		cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	} else		/* cmd == REQ_UNPARK_HEADS */
+		tf->command = ATA_CMD_CHK_POWER;
+
+	cmd.tf_flags |= IDE_TFLAG_CUSTOM_HANDLER;
+	cmd.protocol = ATA_PROT_NODATA;
+
+	cmd.rq = rq;
+
+	return do_rw_taskfile(drive, &cmd);
+}
+
+ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
+		      char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long now;
+	unsigned int msecs;
+
+	if (drive->dev_flags & IDE_DFLAG_NO_UNLOAD)
+		return -EOPNOTSUPP;
+
+	spin_lock_irq(&hwif->lock);
+	now = jiffies;
+	if (drive->dev_flags & IDE_DFLAG_PARKED &&
+	    time_after(drive->sleep, now))
+		msecs = jiffies_to_msecs(drive->sleep - now);
+	else
+		msecs = 0;
+	spin_unlock_irq(&hwif->lock);
+
+	return snprintf(buf, 20, "%u\n", msecs);
+}
+
+ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
+		       const char *buf, size_t len)
+{
+#define MAX_PARK_TIMEOUT 30000
+	ide_drive_t *drive = to_ide_device(dev);
+	long int input;
+	int rc;
+
+	rc = kstrtol(buf, 10, &input);
+	if (rc)
+		return rc;
+	if (input < -2)
+		return -EINVAL;
+	if (input > MAX_PARK_TIMEOUT) {
+		input = MAX_PARK_TIMEOUT;
+		rc = -EOVERFLOW;
+	}
+
+	mutex_lock(&ide_setting_mtx);
+	if (input >= 0) {
+		if (drive->dev_flags & IDE_DFLAG_NO_UNLOAD)
+			rc = -EOPNOTSUPP;
+		else if (input || drive->dev_flags & IDE_DFLAG_PARKED)
+			issue_park_cmd(drive, msecs_to_jiffies(input));
+	} else {
+		if (drive->media == ide_disk)
+			switch (input) {
+			case -1:
+				drive->dev_flags &= ~IDE_DFLAG_NO_UNLOAD;
+				break;
+			case -2:
+				drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
+				break;
+			}
+		else
+			rc = -EOPNOTSUPP;
+	}
+	mutex_unlock(&ide_setting_mtx);
+
+	return rc ? rc : len;
+}
diff --git a/drivers/ide/ide-pci-generic.c b/drivers/ide/ide-pci-generic.c
new file mode 100644
index 000000000..673420db9
--- /dev/null
+++ b/drivers/ide/ide-pci-generic.c
@@ -0,0 +1,203 @@
+/*
+ *  Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
+ *  Portions (C) Copyright 2002  Red Hat Inc
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * For the avoidance of doubt the "preferred form" of this code is one which
+ * is in an open non patent encumbered format. Where cryptographic key signing
+ * forms part of the process of creating an executable the information
+ * including keys needed to generate an equivalently functional executable
+ * are deemed to be part of the source code.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "ide_pci_generic"
+
+static bool ide_generic_all;		/* Set to claim all devices */
+
+module_param_named(all_generic_ide, ide_generic_all, bool, 0444);
+MODULE_PARM_DESC(all_generic_ide, "IDE generic will claim all unknown PCI IDE storage controllers.");
+
+static void netcell_quirkproc(ide_drive_t *drive)
+{
+	/* mark words 85-87 as valid */
+	drive->id[ATA_ID_CSF_DEFAULT] |= 0x4000;
+}
+
+static const struct ide_port_ops netcell_port_ops = {
+	.quirkproc		= netcell_quirkproc,
+};
+
+#define DECLARE_GENERIC_PCI_DEV(extra_flags) \
+	{ \
+		.name		= DRV_NAME, \
+		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA | \
+				  extra_flags, \
+		.swdma_mask	= ATA_SWDMA2, \
+		.mwdma_mask	= ATA_MWDMA2, \
+		.udma_mask	= ATA_UDMA6, \
+	}
+
+static const struct ide_port_info generic_chipsets[] = {
+	/*  0: Unknown */
+	DECLARE_GENERIC_PCI_DEV(0),
+
+	{	/* 1: NS87410 */
+		.name		= DRV_NAME,
+		.enablebits	= { {0x43, 0x08, 0x08}, {0x47, 0x08, 0x08} },
+		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA,
+		.swdma_mask	= ATA_SWDMA2,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA6,
+	},
+
+	/*  2: SAMURAI / HT6565 / HINT_IDE */
+	DECLARE_GENERIC_PCI_DEV(0),
+	/*  3: UM8673F / UM8886A / UM8886BF */
+	DECLARE_GENERIC_PCI_DEV(IDE_HFLAG_NO_DMA),
+	/*  4: VIA_IDE / OPTI621V / Piccolo010{2,3,5} */
+	DECLARE_GENERIC_PCI_DEV(IDE_HFLAG_NO_AUTODMA),
+
+	{	/* 5: VIA8237SATA */
+		.name		= DRV_NAME,
+		.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+				  IDE_HFLAG_OFF_BOARD,
+		.swdma_mask	= ATA_SWDMA2,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA6,
+	},
+
+	{	/* 6: Revolution */
+		.name		= DRV_NAME,
+		.port_ops	= &netcell_port_ops,
+		.host_flags	= IDE_HFLAG_CLEAR_SIMPLEX |
+				  IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+				  IDE_HFLAG_OFF_BOARD,
+		.swdma_mask	= ATA_SWDMA2,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA6,
+	}
+};
+
+/**
+ *	generic_init_one	-	called when a PIIX is found
+ *	@dev: the generic device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+
+static int generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	const struct ide_port_info *d = &generic_chipsets[id->driver_data];
+	int ret = -ENODEV;
+
+	/* Don't use the generic entry unless instructed to do so */
+	if (id->driver_data == 0 && ide_generic_all == 0)
+			goto out;
+
+	switch (dev->vendor) {
+	case PCI_VENDOR_ID_UMC:
+		if (dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
+				!(PCI_FUNC(dev->devfn) & 1))
+			goto out; /* UM8886A/BF pair */
+		break;
+	case PCI_VENDOR_ID_OPTI:
+		if (dev->device == PCI_DEVICE_ID_OPTI_82C558 &&
+				!(PCI_FUNC(dev->devfn) & 1))
+			goto out;
+		break;
+	case PCI_VENDOR_ID_JMICRON:
+		if (dev->device != PCI_DEVICE_ID_JMICRON_JMB368 &&
+				PCI_FUNC(dev->devfn) != 1)
+			goto out;
+		break;
+	case PCI_VENDOR_ID_NS:
+		if (dev->device == PCI_DEVICE_ID_NS_87410 &&
+				(dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
+			goto out;
+		break;
+	}
+
+	if (dev->vendor != PCI_VENDOR_ID_JMICRON) {
+		u16 command;
+		pci_read_config_word(dev, PCI_COMMAND, &command);
+		if (!(command & PCI_COMMAND_IO)) {
+			printk(KERN_INFO "%s %s: skipping disabled "
+				"controller\n", d->name, pci_name(dev));
+			goto out;
+		}
+	}
+	ret = ide_pci_init_one(dev, d, NULL);
+out:
+	return ret;
+}
+
+static const struct pci_device_id generic_pci_tbl[] = {
+	{ PCI_VDEVICE(NS,	PCI_DEVICE_ID_NS_87410),		 1 },
+	{ PCI_VDEVICE(PCTECH,	PCI_DEVICE_ID_PCTECH_SAMURAI_IDE),	 2 },
+	{ PCI_VDEVICE(HOLTEK,	PCI_DEVICE_ID_HOLTEK_6565),		 2 },
+	{ PCI_VDEVICE(UMC,	PCI_DEVICE_ID_UMC_UM8673F),		 3 },
+	{ PCI_VDEVICE(UMC,	PCI_DEVICE_ID_UMC_UM8886A),		 3 },
+	{ PCI_VDEVICE(UMC,	PCI_DEVICE_ID_UMC_UM8886BF),		 3 },
+	{ PCI_VDEVICE(HINT,	PCI_DEVICE_ID_HINT_VXPROII_IDE),	 2 },
+	{ PCI_VDEVICE(VIA,	PCI_DEVICE_ID_VIA_82C561),		 4 },
+	{ PCI_VDEVICE(OPTI,	PCI_DEVICE_ID_OPTI_82C558),		 4 },
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VDEVICE(VIA,	PCI_DEVICE_ID_VIA_8237_SATA),		 5 },
+#endif
+	{ PCI_VDEVICE(TOSHIBA,	PCI_DEVICE_ID_TOSHIBA_PICCOLO_1),	 4 },
+	{ PCI_VDEVICE(TOSHIBA,	PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),	 4 },
+	{ PCI_VDEVICE(TOSHIBA,	PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),	 4 },
+	{ PCI_VDEVICE(TOSHIBA,	PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),	 4 },
+	{ PCI_VDEVICE(NETCELL,	PCI_DEVICE_ID_REVOLUTION),		 6 },
+	/*
+	 * Must come last.  If you add entries adjust
+	 * this table and generic_chipsets[] appropriately.
+	 */
+	{ PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, generic_pci_tbl);
+
+static struct pci_driver generic_pci_driver = {
+	.name		= "PCI_IDE",
+	.id_table	= generic_pci_tbl,
+	.probe		= generic_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init generic_ide_init(void)
+{
+	return ide_pci_register_driver(&generic_pci_driver);
+}
+
+static void __exit generic_ide_exit(void)
+{
+	pci_unregister_driver(&generic_pci_driver);
+}
+
+module_init(generic_ide_init);
+module_exit(generic_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for generic PCI IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-pio-blacklist.c b/drivers/ide/ide-pio-blacklist.c
new file mode 100644
index 000000000..1fd24798e
--- /dev/null
+++ b/drivers/ide/ide-pio-blacklist.c
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * PIO blacklist.  Some drives incorrectly report their maximal PIO mode,
+ * at least in respect to CMD640.  Here we keep info on some known drives.
+ *
+ * Changes to the ide_pio_blacklist[] should be made with EXTREME CAUTION
+ * to avoid breaking the fragile cmd640.c support.
+ */
+
+#include <linux/string.h>
+#include <linux/ide.h>
+
+static struct ide_pio_info {
+	const char	*name;
+	int		pio;
+} ide_pio_blacklist [] = {
+	{ "Conner Peripherals 540MB - CFS540A", 3 },
+
+	{ "WDC AC2700",  3 },
+	{ "WDC AC2540",  3 },
+	{ "WDC AC2420",  3 },
+	{ "WDC AC2340",  3 },
+	{ "WDC AC2250",  0 },
+	{ "WDC AC2200",  0 },
+	{ "WDC AC21200", 4 },
+	{ "WDC AC2120",  0 },
+	{ "WDC AC2850",  3 },
+	{ "WDC AC1270",  3 },
+	{ "WDC AC1170",  1 },
+	{ "WDC AC1210",  1 },
+	{ "WDC AC280",   0 },
+	{ "WDC AC31000", 3 },
+	{ "WDC AC31200", 3 },
+
+	{ "Maxtor 7131 AT", 1 },
+	{ "Maxtor 7171 AT", 1 },
+	{ "Maxtor 7213 AT", 1 },
+	{ "Maxtor 7245 AT", 1 },
+	{ "Maxtor 7345 AT", 1 },
+	{ "Maxtor 7546 AT", 3 },
+	{ "Maxtor 7540 AV", 3 },
+
+	{ "SAMSUNG SHD-3121A", 1 },
+	{ "SAMSUNG SHD-3122A", 1 },
+	{ "SAMSUNG SHD-3172A", 1 },
+
+	{ "ST5660A",  3 },
+	{ "ST3660A",  3 },
+	{ "ST3630A",  3 },
+	{ "ST3655A",  3 },
+	{ "ST3391A",  3 },
+	{ "ST3390A",  1 },
+	{ "ST3600A",  1 },
+	{ "ST3290A",  0 },
+	{ "ST3144A",  0 },
+	{ "ST3491A",  1 }, /* reports 3, should be 1 or 2 (depending on drive)
+			      according to Seagate's FIND-ATA program */
+
+	{ "QUANTUM ELS127A", 0 },
+	{ "QUANTUM ELS170A", 0 },
+	{ "QUANTUM LPS240A", 0 },
+	{ "QUANTUM LPS210A", 3 },
+	{ "QUANTUM LPS270A", 3 },
+	{ "QUANTUM LPS365A", 3 },
+	{ "QUANTUM LPS540A", 3 },
+	{ "QUANTUM LIGHTNING 540A", 3 },
+	{ "QUANTUM LIGHTNING 730A", 3 },
+
+	{ "QUANTUM FIREBALL_540", 3 }, /* Older Quantum Fireballs don't work */
+	{ "QUANTUM FIREBALL_640", 3 },
+	{ "QUANTUM FIREBALL_1080", 3 },
+	{ "QUANTUM FIREBALL_1280", 3 },
+	{ NULL, 0 }
+};
+
+/**
+ *	ide_scan_pio_blacklist 	-	check for a blacklisted drive
+ *	@model: Drive model string
+ *
+ *	This routine searches the ide_pio_blacklist for an entry
+ *	matching the start/whole of the supplied model name.
+ *
+ *	Returns -1 if no match found.
+ *	Otherwise returns the recommended PIO mode from ide_pio_blacklist[].
+ */
+
+int ide_scan_pio_blacklist(char *model)
+{
+	struct ide_pio_info *p;
+
+	for (p = ide_pio_blacklist; p->name != NULL; p++) {
+		if (strncmp(p->name, model, strlen(p->name)) == 0)
+			return p->pio;
+	}
+	return -1;
+}
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
new file mode 100644
index 000000000..82ab308f1
--- /dev/null
+++ b/drivers/ide/ide-pm.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/gfp.h>
+#include <linux/ide.h>
+
+int generic_ide_suspend(struct device *dev, pm_message_t mesg)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq;
+	struct ide_pm_state rqpm;
+	int ret;
+
+	if (ide_port_acpi(hwif)) {
+		/* call ACPI _GTM only once */
+		if ((drive->dn & 1) == 0 || pair == NULL)
+			ide_acpi_get_timing(hwif);
+	}
+
+	memset(&rqpm, 0, sizeof(rqpm));
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;
+	ide_req(rq)->special = &rqpm;
+	rqpm.pm_step = IDE_PM_START_SUSPEND;
+	if (mesg.event == PM_EVENT_PRETHAW)
+		mesg.event = PM_EVENT_FREEZE;
+	rqpm.pm_state = mesg.event;
+
+	blk_execute_rq(drive->queue, NULL, rq, 0);
+	ret = scsi_req(rq)->result ? -EIO : 0;
+	blk_put_request(rq);
+
+	if (ret == 0 && ide_port_acpi(hwif)) {
+		/* call ACPI _PS3 only after both devices are suspended */
+		if ((drive->dn & 1) || pair == NULL)
+			ide_acpi_set_state(hwif, 0);
+	}
+
+	return ret;
+}
+
+static int ide_pm_execute_rq(struct request *rq)
+{
+	struct request_queue *q = rq->q;
+
+	if (unlikely(blk_queue_dying(q))) {
+		rq->rq_flags |= RQF_QUIET;
+		scsi_req(rq)->result = -ENXIO;
+		blk_mq_end_request(rq, BLK_STS_OK);
+		return -ENXIO;
+	}
+	blk_execute_rq(q, NULL, rq, true);
+
+	return scsi_req(rq)->result ? -EIO : 0;
+}
+
+int generic_ide_resume(struct device *dev)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq;
+	struct ide_pm_state rqpm;
+	int err;
+
+	blk_mq_start_stopped_hw_queues(drive->queue, true);
+
+	if (ide_port_acpi(hwif)) {
+		/* call ACPI _PS0 / _STM only once */
+		if ((drive->dn & 1) == 0 || pair == NULL) {
+			ide_acpi_set_state(hwif, 1);
+			ide_acpi_push_timing(hwif);
+		}
+
+		ide_acpi_exec_tfs(drive);
+	}
+
+	memset(&rqpm, 0, sizeof(rqpm));
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, BLK_MQ_REQ_PM);
+	ide_req(rq)->type = ATA_PRIV_PM_RESUME;
+	ide_req(rq)->special = &rqpm;
+	rqpm.pm_step = IDE_PM_START_RESUME;
+	rqpm.pm_state = PM_EVENT_ON;
+
+	err = ide_pm_execute_rq(rq);
+	blk_put_request(rq);
+
+	if (err == 0 && dev->driver) {
+		struct ide_driver *drv = to_ide_driver(dev->driver);
+
+		if (drv->resume)
+			drv->resume(drive);
+	}
+
+	return err;
+}
+
+void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
+{
+	struct ide_pm_state *pm = ide_req(rq)->special;
+
+#ifdef DEBUG_PM
+	printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
+		drive->name, pm->pm_step);
+#endif
+	if (drive->media != ide_disk)
+		return;
+
+	switch (pm->pm_step) {
+	case IDE_PM_FLUSH_CACHE:	/* Suspend step 1 (flush cache) */
+		if (pm->pm_state == PM_EVENT_FREEZE)
+			pm->pm_step = IDE_PM_COMPLETED;
+		else
+			pm->pm_step = IDE_PM_STANDBY;
+		break;
+	case IDE_PM_STANDBY:		/* Suspend step 2 (standby) */
+		pm->pm_step = IDE_PM_COMPLETED;
+		break;
+	case IDE_PM_RESTORE_PIO:	/* Resume step 1 (restore PIO) */
+		pm->pm_step = IDE_PM_IDLE;
+		break;
+	case IDE_PM_IDLE:		/* Resume step 2 (idle)*/
+		pm->pm_step = IDE_PM_RESTORE_DMA;
+		break;
+	}
+}
+
+ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
+{
+	struct ide_pm_state *pm = ide_req(rq)->special;
+	struct ide_cmd cmd = { };
+
+	switch (pm->pm_step) {
+	case IDE_PM_FLUSH_CACHE:	/* Suspend step 1 (flush cache) */
+		if (drive->media != ide_disk)
+			break;
+		/* Not supported? Switch to next step now. */
+		if (ata_id_flush_enabled(drive->id) == 0 ||
+		    (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) {
+			ide_complete_power_step(drive, rq);
+			return ide_stopped;
+		}
+		if (ata_id_flush_ext_enabled(drive->id))
+			cmd.tf.command = ATA_CMD_FLUSH_EXT;
+		else
+			cmd.tf.command = ATA_CMD_FLUSH;
+		goto out_do_tf;
+	case IDE_PM_STANDBY:		/* Suspend step 2 (standby) */
+		cmd.tf.command = ATA_CMD_STANDBYNOW1;
+		goto out_do_tf;
+	case IDE_PM_RESTORE_PIO:	/* Resume step 1 (restore PIO) */
+		ide_set_max_pio(drive);
+		/*
+		 * skip IDE_PM_IDLE for ATAPI devices
+		 */
+		if (drive->media != ide_disk)
+			pm->pm_step = IDE_PM_RESTORE_DMA;
+		else
+			ide_complete_power_step(drive, rq);
+		return ide_stopped;
+	case IDE_PM_IDLE:		/* Resume step 2 (idle) */
+		cmd.tf.command = ATA_CMD_IDLEIMMEDIATE;
+		goto out_do_tf;
+	case IDE_PM_RESTORE_DMA:	/* Resume step 3 (restore DMA) */
+		/*
+		 * Right now, all we do is call ide_set_dma(drive),
+		 * we could be smarter and check for current xfer_speed
+		 * in struct drive etc...
+		 */
+		if (drive->hwif->dma_ops == NULL)
+			break;
+		/*
+		 * TODO: respect IDE_DFLAG_USING_DMA
+		 */
+		ide_set_dma(drive);
+		break;
+	}
+
+	pm->pm_step = IDE_PM_COMPLETED;
+
+	return ide_stopped;
+
+out_do_tf:
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	cmd.protocol = ATA_PROT_NODATA;
+
+	return do_rw_taskfile(drive, &cmd);
+}
+
+/**
+ *	ide_complete_pm_rq - end the current Power Management request
+ *	@drive: target drive
+ *	@rq: request
+ *
+ *	This function cleans up the current PM request and stops the queue
+ *	if necessary.
+ */
+void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
+{
+	struct request_queue *q = drive->queue;
+	struct ide_pm_state *pm = ide_req(rq)->special;
+
+	ide_complete_power_step(drive, rq);
+	if (pm->pm_step != IDE_PM_COMPLETED)
+		return;
+
+#ifdef DEBUG_PM
+	printk("%s: completing PM request, %s\n", drive->name,
+	       (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND) ? "suspend" : "resume");
+#endif
+	if (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND)
+		blk_mq_stop_hw_queues(q);
+	else
+		drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
+
+	drive->hwif->rq = NULL;
+
+	blk_mq_end_request(rq, BLK_STS_OK);
+}
+
+void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
+{
+	struct ide_pm_state *pm = ide_req(rq)->special;
+
+	if (blk_rq_is_private(rq) &&
+	    ide_req(rq)->type == ATA_PRIV_PM_SUSPEND &&
+	    pm->pm_step == IDE_PM_START_SUSPEND)
+		/* Mark drive blocked when starting the suspend sequence. */
+		drive->dev_flags |= IDE_DFLAG_BLOCKED;
+	else if (blk_rq_is_private(rq) &&
+	         ide_req(rq)->type == ATA_PRIV_PM_RESUME &&
+		 pm->pm_step == IDE_PM_START_RESUME) {
+		/*
+		 * The first thing we do on wakeup is to wait for BSY bit to
+		 * go away (with a looong timeout) as a drive on this hwif may
+		 * just be POSTing itself.
+		 * We do that before even selecting as the "other" device on
+		 * the bus may be broken enough to walk on our toes at this
+		 * point.
+		 */
+		ide_hwif_t *hwif = drive->hwif;
+		const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+		struct request_queue *q = drive->queue;
+		int rc;
+#ifdef DEBUG_PM
+		printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
+#endif
+		rc = ide_wait_not_busy(hwif, 35000);
+		if (rc)
+			printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
+		tp_ops->dev_select(drive);
+		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+		rc = ide_wait_not_busy(hwif, 100000);
+		if (rc)
+			printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
+
+		blk_mq_start_hw_queues(q);
+	}
+}
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
new file mode 100644
index 000000000..fc541f1cf
--- /dev/null
+++ b/drivers/ide/ide-pnp.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * This file provides autodetection for ISA PnP IDE interfaces.
+ * It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
+ *
+ * Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>
+ */
+
+#include <linux/init.h>
+#include <linux/pnp.h>
+#include <linux/ide.h>
+#include <linux/module.h>
+
+#define DRV_NAME "ide-pnp"
+
+/* Add your devices here :)) */
+static const struct pnp_device_id idepnp_devices[] = {
+	/* Generic ESDI/IDE/ATA compatible hard disk controller */
+	{.id = "PNP0600", .driver_data = 0},
+	{.id = ""}
+};
+
+static const struct ide_port_info ide_pnp_port_info = {
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.chipset		= ide_generic,
+};
+
+static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
+{
+	struct ide_host *host;
+	unsigned long base, ctl;
+	int rc;
+	struct ide_hw hw, *hws[] = { &hw };
+
+	printk(KERN_INFO DRV_NAME ": generic PnP IDE interface\n");
+
+	if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
+		return -1;
+
+	base = pnp_port_start(dev, 0);
+	ctl = pnp_port_start(dev, 1);
+
+	if (!request_region(base, 8, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+				DRV_NAME, base, base + 7);
+		return -EBUSY;
+	}
+
+	if (!request_region(ctl, 1, DRV_NAME)) {
+		printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+				DRV_NAME, ctl);
+		release_region(base, 8);
+		return -EBUSY;
+	}
+
+	memset(&hw, 0, sizeof(hw));
+	ide_std_init_ports(&hw, base, ctl);
+	hw.irq = pnp_irq(dev, 0);
+
+	rc = ide_host_add(&ide_pnp_port_info, hws, 1, &host);
+	if (rc)
+		goto out;
+
+	pnp_set_drvdata(dev, host);
+
+	return 0;
+out:
+	release_region(ctl, 1);
+	release_region(base, 8);
+
+	return rc;
+}
+
+static void idepnp_remove(struct pnp_dev *dev)
+{
+	struct ide_host *host = pnp_get_drvdata(dev);
+
+	ide_host_remove(host);
+
+	release_region(pnp_port_start(dev, 1), 1);
+	release_region(pnp_port_start(dev, 0), 8);
+}
+
+static struct pnp_driver idepnp_driver = {
+	.name		= "ide",
+	.id_table	= idepnp_devices,
+	.probe		= idepnp_probe,
+	.remove		= idepnp_remove,
+};
+
+module_pnp_driver(idepnp_driver);
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
new file mode 100644
index 000000000..1ddc45a04
--- /dev/null
+++ b/drivers/ide/ide-probe.c
@@ -0,0 +1,1680 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1994-1998   Linus Torvalds & authors (see below)
+ *  Copyright (C) 2005, 2007  Bartlomiej Zolnierkiewicz
+ */
+
+/*
+ *  Mostly written by Mark Lord <mlord@pobox.com>
+ *                and Gadi Oxman <gadio@netvision.net.il>
+ *                and Andre Hedrick <andre@linux-ide.org>
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ * This is the IDE probe module, as evolved from hd.c and ide.c.
+ *
+ * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
+ *	 by Andrea Arcangeli
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/spinlock.h>
+#include <linux/kmod.h>
+#include <linux/pci.h>
+#include <linux/scatterlist.h>
+
+#include <asm/byteorder.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+/**
+ *	generic_id		-	add a generic drive id
+ *	@drive:	drive to make an ID block for
+ *	
+ *	Add a fake id field to the drive we are passed. This allows
+ *	use to skip a ton of NULL checks (which people always miss) 
+ *	and make drive properties unconditional outside of this file
+ */
+ 
+static void generic_id(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+
+	id[ATA_ID_CUR_CYLS]	= id[ATA_ID_CYLS]	= drive->cyl;
+	id[ATA_ID_CUR_HEADS]	= id[ATA_ID_HEADS]	= drive->head;
+	id[ATA_ID_CUR_SECTORS]	= id[ATA_ID_SECTORS]	= drive->sect;
+}
+
+static void ide_disk_init_chs(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+
+	/* Extract geometry if we did not already have one for the drive */
+	if (!drive->cyl || !drive->head || !drive->sect) {
+		drive->cyl  = drive->bios_cyl  = id[ATA_ID_CYLS];
+		drive->head = drive->bios_head = id[ATA_ID_HEADS];
+		drive->sect = drive->bios_sect = id[ATA_ID_SECTORS];
+	}
+
+	/* Handle logical geometry translation by the drive */
+	if (ata_id_current_chs_valid(id)) {
+		drive->cyl  = id[ATA_ID_CUR_CYLS];
+		drive->head = id[ATA_ID_CUR_HEADS];
+		drive->sect = id[ATA_ID_CUR_SECTORS];
+	}
+
+	/* Use physical geometry if what we have still makes no sense */
+	if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
+		drive->cyl  = id[ATA_ID_CYLS];
+		drive->head = id[ATA_ID_HEADS];
+		drive->sect = id[ATA_ID_SECTORS];
+	}
+}
+
+static void ide_disk_init_mult_count(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
+
+	if (max_multsect) {
+		if ((max_multsect / 2) > 1)
+			id[ATA_ID_MULTSECT] = max_multsect | 0x100;
+		else
+			id[ATA_ID_MULTSECT] &= ~0x1ff;
+
+		drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
+
+		if (drive->mult_req)
+			drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
+	}
+}
+
+static void ide_classify_ata_dev(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	char *m = (char *)&id[ATA_ID_PROD];
+	int is_cfa = ata_id_is_cfa(id);
+
+	/* CF devices are *not* removable in Linux definition of the term */
+	if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
+		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
+
+	drive->media = ide_disk;
+
+	if (!ata_id_has_unload(drive->id))
+		drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
+
+	printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
+		is_cfa ? "CFA" : "ATA");
+}
+
+static void ide_classify_atapi_dev(ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	char *m = (char *)&id[ATA_ID_PROD];
+	u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
+
+	printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
+	switch (type) {
+	case ide_floppy:
+		if (!strstr(m, "CD-ROM")) {
+			if (!strstr(m, "oppy") &&
+			    !strstr(m, "poyp") &&
+			    !strstr(m, "ZIP"))
+				printk(KERN_CONT "cdrom or floppy?, assuming ");
+			if (drive->media != ide_cdrom) {
+				printk(KERN_CONT "FLOPPY");
+				drive->dev_flags |= IDE_DFLAG_REMOVABLE;
+				break;
+			}
+		}
+		/* Early cdrom models used zero */
+		type = ide_cdrom;
+		fallthrough;
+	case ide_cdrom:
+		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
+#ifdef CONFIG_PPC
+		/* kludge for Apple PowerBook internal zip */
+		if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
+			printk(KERN_CONT "FLOPPY");
+			type = ide_floppy;
+			break;
+		}
+#endif
+		printk(KERN_CONT "CD/DVD-ROM");
+		break;
+	case ide_tape:
+		printk(KERN_CONT "TAPE");
+		break;
+	case ide_optical:
+		printk(KERN_CONT "OPTICAL");
+		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
+		break;
+	default:
+		printk(KERN_CONT "UNKNOWN (type %d)", type);
+		break;
+	}
+
+	printk(KERN_CONT " drive\n");
+	drive->media = type;
+	/* an ATAPI device ignores DRDY */
+	drive->ready_stat = 0;
+	if (ata_id_cdb_intr(id))
+		drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
+	drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
+	/* we don't do head unloading on ATAPI devices */
+	drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
+}
+
+/**
+ *	do_identify	-	identify a drive
+ *	@drive: drive to identify 
+ *	@cmd: command used
+ *	@id: buffer for IDENTIFY data
+ *
+ *	Called when we have issued a drive identify command to
+ *	read and parse the results. This function is run with
+ *	interrupts disabled. 
+ */
+
+static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	char *m = (char *)&id[ATA_ID_PROD];
+	unsigned long flags;
+	int bswap = 1;
+
+	/* local CPU only; some systems need this */
+	local_irq_save(flags);
+	/* read 512 bytes of id info */
+	hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
+	local_irq_restore(flags);
+
+	drive->dev_flags |= IDE_DFLAG_ID_READ;
+#ifdef DEBUG
+	printk(KERN_INFO "%s: dumping identify data\n", drive->name);
+	ide_dump_identify((u8 *)id);
+#endif
+	ide_fix_driveid(id);
+
+	/*
+	 *  ATA_CMD_ID_ATA returns little-endian info,
+	 *  ATA_CMD_ID_ATAPI *usually* returns little-endian info.
+	 */
+	if (cmd == ATA_CMD_ID_ATAPI) {
+		if ((m[0] == 'N' && m[1] == 'E') ||  /* NEC */
+		    (m[0] == 'F' && m[1] == 'X') ||  /* Mitsumi */
+		    (m[0] == 'P' && m[1] == 'i'))    /* Pioneer */
+			/* Vertos drives may still be weird */
+			bswap ^= 1;
+	}
+
+	ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
+	ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
+	ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
+
+	/* we depend on this a lot! */
+	m[ATA_ID_PROD_LEN - 1] = '\0';
+
+	if (strstr(m, "E X A B Y T E N E S T"))
+		drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+	else
+		drive->dev_flags |= IDE_DFLAG_PRESENT;
+}
+
+/**
+ *	ide_dev_read_id	-	send ATA/ATAPI IDENTIFY command
+ *	@drive: drive to identify
+ *	@cmd: command to use
+ *	@id: buffer for IDENTIFY data
+ *	@irq_ctx: flag set when called from the IRQ context
+ *
+ *	Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
+ *
+ *	Returns:	0  device was identified
+ *			1  device timed-out (no response to identify request)
+ *			2  device aborted the command (refused to identify itself)
+ */
+
+int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	int use_altstatus = 0, rc;
+	unsigned long timeout;
+	u8 s = 0, a = 0;
+
+	/*
+	 * Disable device IRQ.  Otherwise we'll get spurious interrupts
+	 * during the identify phase that the IRQ handler isn't expecting.
+	 */
+	if (io_ports->ctl_addr)
+		tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
+
+	/* take a deep breath */
+	if (irq_ctx)
+		mdelay(50);
+	else
+		msleep(50);
+
+	if (io_ports->ctl_addr &&
+	    (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
+		a = tp_ops->read_altstatus(hwif);
+		s = tp_ops->read_status(hwif);
+		if ((a ^ s) & ~ATA_SENSE)
+			/* ancient Seagate drives, broken interfaces */
+			printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
+					 "instead of ALTSTATUS(0x%02x)\n",
+					 drive->name, s, a);
+		else
+			/* use non-intrusive polling */
+			use_altstatus = 1;
+	}
+
+	/* set features register for atapi
+	 * identify command to be sure of reply
+	 */
+	if (cmd == ATA_CMD_ID_ATAPI) {
+		struct ide_taskfile tf;
+
+		memset(&tf, 0, sizeof(tf));
+		/* disable DMA & overlap */
+		tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
+	}
+
+	/* ask drive for ID */
+	tp_ops->exec_command(hwif, cmd);
+
+	timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
+
+	/* wait for IRQ and ATA_DRQ */
+	if (irq_ctx) {
+		rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
+		if (rc)
+			return 1;
+	} else {
+		rc = ide_busy_sleep(drive, timeout, use_altstatus);
+		if (rc)
+			return 1;
+
+		msleep(50);
+		s = tp_ops->read_status(hwif);
+	}
+
+	if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
+		/* drive returned ID */
+		do_identify(drive, cmd, id);
+		/* drive responded with ID */
+		rc = 0;
+		/* clear drive IRQ */
+		(void)tp_ops->read_status(hwif);
+	} else {
+		/* drive refused ID */
+		rc = 2;
+	}
+	return rc;
+}
+
+int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 stat;
+
+	timeout += jiffies;
+
+	do {
+		msleep(50);	/* give drive a breather */
+		stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
+				 : hwif->tp_ops->read_status(hwif);
+		if ((stat & ATA_BUSY) == 0)
+			return 0;
+	} while (time_before(jiffies, timeout));
+
+	printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
+
+	return 1;	/* drive timed-out */
+}
+
+static u8 ide_read_device(ide_drive_t *drive)
+{
+	struct ide_taskfile tf;
+
+	drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
+
+	return tf.device;
+}
+
+/**
+ *	do_probe		-	probe an IDE device
+ *	@drive: drive to probe
+ *	@cmd: command to use
+ *
+ *	do_probe() has the difficult job of finding a drive if it exists,
+ *	without getting hung up if it doesn't exist, without trampling on
+ *	ethernet cards, and without leaving any IRQs dangling to haunt us later.
+ *
+ *	If a drive is "known" to exist (from CMOS or kernel parameters),
+ *	but does not respond right away, the probe will "hang in there"
+ *	for the maximum wait time (about 30 seconds), otherwise it will
+ *	exit much more quickly.
+ *
+ * Returns:	0  device was identified
+ *		1  device timed-out (no response to identify request)
+ *		2  device aborted the command (refused to identify itself)
+ *		3  bad status from device (possible for ATAPI drives)
+ *		4  probe was not attempted because failure was obvious
+ */
+
+static int do_probe (ide_drive_t *drive, u8 cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	u16 *id = drive->id;
+	int rc;
+	u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
+
+	/* avoid waiting for inappropriate probes */
+	if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
+		return 4;
+
+#ifdef DEBUG
+	printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
+		drive->name, present, drive->media,
+		(cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
+#endif
+
+	/* needed for some systems
+	 * (e.g. crw9624 as drive0 with disk as slave)
+	 */
+	msleep(50);
+	tp_ops->dev_select(drive);
+	msleep(50);
+
+	if (ide_read_device(drive) != drive->select && present == 0) {
+		if (drive->dn & 1) {
+			/* exit with drive0 selected */
+			tp_ops->dev_select(hwif->devices[0]);
+			/* allow ATA_BUSY to assert & clear */
+			msleep(50);
+		}
+		/* no i/f present: mmm.. this should be a 4 -ml */
+		return 3;
+	}
+
+	stat = tp_ops->read_status(hwif);
+
+	if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
+	    present || cmd == ATA_CMD_ID_ATAPI) {
+		rc = ide_dev_read_id(drive, cmd, id, 0);
+		if (rc)
+			/* failed: try again */
+			rc = ide_dev_read_id(drive, cmd, id, 0);
+
+		stat = tp_ops->read_status(hwif);
+
+		if (stat == (ATA_BUSY | ATA_DRDY))
+			return 4;
+
+		if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
+			printk(KERN_ERR "%s: no response (status = 0x%02x), "
+					"resetting drive\n", drive->name, stat);
+			msleep(50);
+			tp_ops->dev_select(drive);
+			msleep(50);
+			tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
+			(void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
+			rc = ide_dev_read_id(drive, cmd, id, 0);
+		}
+
+		/* ensure drive IRQ is clear */
+		stat = tp_ops->read_status(hwif);
+
+		if (rc == 1)
+			printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
+					drive->name, stat);
+	} else {
+		/* not present or maybe ATAPI */
+		rc = 3;
+	}
+	if (drive->dn & 1) {
+		/* exit with drive0 selected */
+		tp_ops->dev_select(hwif->devices[0]);
+		msleep(50);
+		/* ensure drive irq is clear */
+		(void)tp_ops->read_status(hwif);
+	}
+	return rc;
+}
+
+/**
+ *	probe_for_drives	-	upper level drive probe
+ *	@drive: drive to probe for
+ *
+ *	probe_for_drive() tests for existence of a given drive using do_probe()
+ *	and presents things to the user as needed.
+ *
+ *	Returns:	0  no device was found
+ *			1  device was found
+ *			   (note: IDE_DFLAG_PRESENT might still be not set)
+ */
+
+static u8 probe_for_drive(ide_drive_t *drive)
+{
+	char *m;
+	int rc;
+	u8 cmd;
+
+	drive->dev_flags &= ~IDE_DFLAG_ID_READ;
+
+	m = (char *)&drive->id[ATA_ID_PROD];
+	strcpy(m, "UNKNOWN");
+
+	/* skip probing? */
+	if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
+		/* if !(success||timed-out) */
+		cmd = ATA_CMD_ID_ATA;
+		rc = do_probe(drive, cmd);
+		if (rc >= 2) {
+			/* look for ATAPI device */
+			cmd = ATA_CMD_ID_ATAPI;
+			rc = do_probe(drive, cmd);
+		}
+
+		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+			return 0;
+
+		/* identification failed? */
+		if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
+			if (drive->media == ide_disk) {
+				printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
+					drive->name, drive->cyl,
+					drive->head, drive->sect);
+			} else if (drive->media == ide_cdrom) {
+				printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
+			} else {
+				/* nuke it */
+				printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
+				drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+			}
+		} else {
+			if (cmd == ATA_CMD_ID_ATAPI)
+				ide_classify_atapi_dev(drive);
+			else
+				ide_classify_ata_dev(drive);
+		}
+	}
+
+	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+		return 0;
+
+	/* The drive wasn't being helpful. Add generic info only */
+	if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
+		generic_id(drive);
+		return 1;
+	}
+
+	if (drive->media == ide_disk) {
+		ide_disk_init_chs(drive);
+		ide_disk_init_mult_count(drive);
+	}
+
+	return 1;
+}
+
+static void hwif_release_dev(struct device *dev)
+{
+	ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
+
+	complete(&hwif->gendev_rel_comp);
+}
+
+static int ide_register_port(ide_hwif_t *hwif)
+{
+	int ret;
+
+	/* register with global device tree */
+	dev_set_name(&hwif->gendev, "%s", hwif->name);
+	dev_set_drvdata(&hwif->gendev, hwif);
+	if (hwif->gendev.parent == NULL)
+		hwif->gendev.parent = hwif->dev;
+	hwif->gendev.release = hwif_release_dev;
+
+	ret = device_register(&hwif->gendev);
+	if (ret < 0) {
+		printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
+			__func__, ret);
+		goto out;
+	}
+
+	hwif->portdev = device_create(ide_port_class, &hwif->gendev,
+				      MKDEV(0, 0), hwif, "%s", hwif->name);
+	if (IS_ERR(hwif->portdev)) {
+		ret = PTR_ERR(hwif->portdev);
+		device_unregister(&hwif->gendev);
+	}
+out:
+	return ret;
+}
+
+/**
+ *	ide_port_wait_ready	-	wait for port to become ready
+ *	@hwif: IDE port
+ *
+ *	This is needed on some PPCs and a bunch of BIOS-less embedded
+ *	platforms.  Typical cases are:
+ *
+ *	- The firmware hard reset the disk before booting the kernel,
+ *	  the drive is still doing it's poweron-reset sequence, that
+ *	  can take up to 30 seconds.
+ *
+ *	- The firmware does nothing (or no firmware), the device is
+ *	  still in POST state (same as above actually).
+ *
+ *	- Some CD/DVD/Writer combo drives tend to drive the bus during
+ *	  their reset sequence even when they are non-selected slave
+ *	  devices, thus preventing discovery of the main HD.
+ *
+ *	Doing this wait-for-non-busy should not harm any existing
+ *	configuration and fix some issues like the above.
+ *
+ *	BenH.
+ *
+ *	Returns 0 on success, error code (< 0) otherwise.
+ */
+
+static int ide_port_wait_ready(ide_hwif_t *hwif)
+{
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	ide_drive_t *drive;
+	int i, rc;
+
+	printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
+
+	/* Let HW settle down a bit from whatever init state we
+	 * come from */
+	mdelay(2);
+
+	/* Wait for BSY bit to go away, spec timeout is 30 seconds,
+	 * I know of at least one disk who takes 31 seconds, I use 35
+	 * here to be safe
+	 */
+	rc = ide_wait_not_busy(hwif, 35000);
+	if (rc)
+		return rc;
+
+	/* Now make sure both master & slave are ready */
+	ide_port_for_each_dev(i, drive, hwif) {
+		/* Ignore disks that we will not probe for later. */
+		if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
+		    (drive->dev_flags & IDE_DFLAG_PRESENT)) {
+			tp_ops->dev_select(drive);
+			tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+			mdelay(2);
+			rc = ide_wait_not_busy(hwif, 35000);
+			if (rc)
+				goto out;
+		} else
+			printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
+					  drive->name);
+	}
+out:
+	/* Exit function with master reselected (let's be sane) */
+	if (i)
+		tp_ops->dev_select(hwif->devices[0]);
+
+	return rc;
+}
+
+/**
+ *	ide_undecoded_slave	-	look for bad CF adapters
+ *	@dev1: slave device
+ *
+ *	Analyse the drives on the interface and attempt to decide if we
+ *	have the same drive viewed twice. This occurs with crap CF adapters
+ *	and PCMCIA sometimes.
+ */
+
+void ide_undecoded_slave(ide_drive_t *dev1)
+{
+	ide_drive_t *dev0 = dev1->hwif->devices[0];
+
+	if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
+		return;
+
+	/* If the models don't match they are not the same product */
+	if (strcmp((char *)&dev0->id[ATA_ID_PROD],
+		   (char *)&dev1->id[ATA_ID_PROD]))
+		return;
+
+	/* Serial numbers do not match */
+	if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
+		    (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
+		return;
+
+	/* No serial number, thankfully very rare for CF */
+	if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
+		return;
+
+	/* Appears to be an IDE flash adapter with decode bugs */
+	printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
+
+	dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
+}
+
+EXPORT_SYMBOL_GPL(ide_undecoded_slave);
+
+static int ide_probe_port(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	unsigned int irqd;
+	int i, rc = -ENODEV;
+
+	BUG_ON(hwif->present);
+
+	if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
+	    (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
+		return -EACCES;
+
+	/*
+	 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
+	 * we'll install our IRQ driver much later...
+	 */
+	irqd = hwif->irq;
+	if (irqd)
+		disable_irq(hwif->irq);
+
+	if (ide_port_wait_ready(hwif) == -EBUSY)
+		printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
+
+	/*
+	 * Second drive should only exist if first drive was found,
+	 * but a lot of cdrom drives are configured as single slaves.
+	 */
+	ide_port_for_each_dev(i, drive, hwif) {
+		(void) probe_for_drive(drive);
+		if (drive->dev_flags & IDE_DFLAG_PRESENT)
+			rc = 0;
+	}
+
+	/*
+	 * Use cached IRQ number. It might be (and is...) changed by probe
+	 * code above
+	 */
+	if (irqd)
+		enable_irq(irqd);
+
+	return rc;
+}
+
+static void ide_port_tune_devices(ide_hwif_t *hwif)
+{
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+	ide_drive_t *drive;
+	int i;
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		ide_check_nien_quirk_list(drive);
+
+		if (port_ops && port_ops->quirkproc)
+			port_ops->quirkproc(drive);
+	}
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		ide_set_max_pio(drive);
+
+		drive->dev_flags |= IDE_DFLAG_NICE1;
+
+		if (hwif->dma_ops)
+			ide_set_dma(drive);
+	}
+}
+
+static void ide_initialize_rq(struct request *rq)
+{
+	struct ide_request *req = blk_mq_rq_to_pdu(rq);
+
+	req->special = NULL;
+	scsi_req_init(&req->sreq);
+	req->sreq.sense = req->sense;
+}
+
+static const struct blk_mq_ops ide_mq_ops = {
+	.queue_rq		= ide_queue_rq,
+	.initialize_rq_fn	= ide_initialize_rq,
+};
+
+/*
+ * init request queue
+ */
+static int ide_init_queue(ide_drive_t *drive)
+{
+	struct request_queue *q;
+	ide_hwif_t *hwif = drive->hwif;
+	int max_sectors = 256;
+	int max_sg_entries = PRD_ENTRIES;
+	struct blk_mq_tag_set *set;
+
+	/*
+	 *	Our default set up assumes the normal IDE case,
+	 *	that is 64K segmenting, standard PRD setup
+	 *	and LBA28. Some drivers then impose their own
+	 *	limits and LBA48 we could raise it but as yet
+	 *	do not.
+	 */
+
+	set = &drive->tag_set;
+	set->ops = &ide_mq_ops;
+	set->nr_hw_queues = 1;
+	set->queue_depth = 32;
+	set->reserved_tags = 1;
+	set->cmd_size = sizeof(struct ide_request);
+	set->numa_node = hwif_to_node(hwif);
+	set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING;
+	if (blk_mq_alloc_tag_set(set))
+		return 1;
+
+	q = blk_mq_init_queue(set);
+	if (IS_ERR(q)) {
+		blk_mq_free_tag_set(set);
+		return 1;
+	}
+
+	blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
+
+	q->queuedata = drive;
+	blk_queue_segment_boundary(q, 0xffff);
+
+	if (hwif->rqsize < max_sectors)
+		max_sectors = hwif->rqsize;
+	blk_queue_max_hw_sectors(q, max_sectors);
+
+#ifdef CONFIG_PCI
+	/* When we have an IOMMU, we may have a problem where pci_map_sg()
+	 * creates segments that don't completely match our boundary
+	 * requirements and thus need to be broken up again. Because it
+	 * doesn't align properly either, we may actually have to break up
+	 * to more segments than what was we got in the first place, a max
+	 * worst case is twice as many.
+	 * This will be fixed once we teach pci_map_sg() about our boundary
+	 * requirements, hopefully soon. *FIXME*
+	 */
+	max_sg_entries >>= 1;
+#endif /* CONFIG_PCI */
+
+	blk_queue_max_segments(q, max_sg_entries);
+
+	/* assign drive queue */
+	drive->queue = q;
+
+	return 0;
+}
+
+static DEFINE_MUTEX(ide_cfg_mtx);
+
+/*
+ * For any present drive:
+ * - allocate the block device queue
+ */
+static int ide_port_setup_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i, j = 0;
+
+	mutex_lock(&ide_cfg_mtx);
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		if (ide_init_queue(drive)) {
+			printk(KERN_ERR "ide: failed to init %s\n",
+					drive->name);
+			drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+			continue;
+		}
+
+		j++;
+	}
+	mutex_unlock(&ide_cfg_mtx);
+
+	return j;
+}
+
+static void ide_host_enable_irqs(struct ide_host *host)
+{
+	ide_hwif_t *hwif;
+	int i;
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif == NULL)
+			continue;
+
+		/* clear any pending IRQs */
+		hwif->tp_ops->read_status(hwif);
+
+		/* unmask IRQs */
+		if (hwif->io_ports.ctl_addr)
+			hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+	}
+}
+
+/*
+ * This routine sets up the IRQ for an IDE interface.
+ */
+static int init_irq (ide_hwif_t *hwif)
+{
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	struct ide_host *host = hwif->host;
+	irq_handler_t irq_handler = host->irq_handler;
+	int sa = host->irq_flags;
+
+	if (irq_handler == NULL)
+		irq_handler = ide_intr;
+
+	if (!host->get_lock)
+		if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
+			goto out_up;
+
+#if !defined(__mc68000__)
+	printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
+		io_ports->data_addr, io_ports->status_addr,
+		io_ports->ctl_addr, hwif->irq);
+#else
+	printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
+		io_ports->data_addr, hwif->irq);
+#endif /* __mc68000__ */
+	if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
+		printk(KERN_CONT " (serialized)");
+	printk(KERN_CONT "\n");
+
+	return 0;
+out_up:
+	return 1;
+}
+
+static int ata_lock(dev_t dev, void *data)
+{
+	/* FIXME: we want to pin hwif down */
+	return 0;
+}
+
+static struct kobject *ata_probe(dev_t dev, int *part, void *data)
+{
+	ide_hwif_t *hwif = data;
+	int unit = *part >> PARTN_BITS;
+	ide_drive_t *drive = hwif->devices[unit];
+
+	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+		return NULL;
+
+	if (drive->media == ide_disk)
+		request_module("ide-disk");
+	if (drive->media == ide_cdrom || drive->media == ide_optical)
+		request_module("ide-cd");
+	if (drive->media == ide_tape)
+		request_module("ide-tape");
+	if (drive->media == ide_floppy)
+		request_module("ide-floppy");
+
+	return NULL;
+}
+
+static struct kobject *exact_match(dev_t dev, int *part, void *data)
+{
+	struct gendisk *p = data;
+	*part &= (1 << PARTN_BITS) - 1;
+	return &disk_to_dev(p)->kobj;
+}
+
+static int exact_lock(dev_t dev, void *data)
+{
+	struct gendisk *p = data;
+
+	if (!get_disk_and_module(p))
+		return -1;
+	return 0;
+}
+
+void ide_register_region(struct gendisk *disk)
+{
+	blk_register_region(MKDEV(disk->major, disk->first_minor),
+			    disk->minors, NULL, exact_match, exact_lock, disk);
+}
+
+EXPORT_SYMBOL_GPL(ide_register_region);
+
+void ide_unregister_region(struct gendisk *disk)
+{
+	blk_unregister_region(MKDEV(disk->major, disk->first_minor),
+			      disk->minors);
+}
+
+EXPORT_SYMBOL_GPL(ide_unregister_region);
+
+void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned int unit = drive->dn & 1;
+
+	disk->major = hwif->major;
+	disk->first_minor = unit << PARTN_BITS;
+	sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
+	disk->queue = drive->queue;
+}
+
+EXPORT_SYMBOL_GPL(ide_init_disk);
+
+static void drive_release_dev (struct device *dev)
+{
+	ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
+
+	ide_proc_unregister_device(drive);
+
+	if (drive->sense_rq)
+		blk_mq_free_request(drive->sense_rq);
+
+	blk_cleanup_queue(drive->queue);
+	drive->queue = NULL;
+	blk_mq_free_tag_set(&drive->tag_set);
+
+	drive->dev_flags &= ~IDE_DFLAG_PRESENT;
+
+	complete(&drive->gendev_rel_comp);
+}
+
+static int hwif_init(ide_hwif_t *hwif)
+{
+	if (!hwif->irq) {
+		printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
+		return 0;
+	}
+
+	if (register_blkdev(hwif->major, hwif->name))
+		return 0;
+
+	if (!hwif->sg_max_nents)
+		hwif->sg_max_nents = PRD_ENTRIES;
+
+	hwif->sg_table = kmalloc_array(hwif->sg_max_nents,
+				       sizeof(struct scatterlist),
+				       GFP_KERNEL);
+	if (!hwif->sg_table) {
+		printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
+		goto out;
+	}
+
+	sg_init_table(hwif->sg_table, hwif->sg_max_nents);
+	
+	if (init_irq(hwif)) {
+		printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
+			hwif->name, hwif->irq);
+		goto out;
+	}
+
+	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
+			    THIS_MODULE, ata_probe, ata_lock, hwif);
+	return 1;
+
+out:
+	unregister_blkdev(hwif->major, hwif->name);
+	return 0;
+}
+
+static void hwif_register_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	unsigned int i;
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		struct device *dev = &drive->gendev;
+		int ret;
+
+		dev_set_name(dev, "%u.%u", hwif->index, i);
+		dev_set_drvdata(dev, drive);
+		dev->parent = &hwif->gendev;
+		dev->bus = &ide_bus_type;
+		dev->release = drive_release_dev;
+
+		ret = device_register(dev);
+		if (ret < 0)
+			printk(KERN_WARNING "IDE: %s: device_register error: "
+					    "%d\n", __func__, ret);
+	}
+}
+
+static void ide_port_init_devices(ide_hwif_t *hwif)
+{
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+	ide_drive_t *drive;
+	int i;
+
+	ide_port_for_each_dev(i, drive, hwif) {
+		drive->dn = i + hwif->channel * 2;
+
+		if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
+			drive->io_32bit = 1;
+		if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
+			drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
+		if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
+			drive->dev_flags |= IDE_DFLAG_UNMASK;
+		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
+			drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
+
+		drive->pio_mode = XFER_PIO_0;
+
+		if (port_ops && port_ops->init_dev)
+			port_ops->init_dev(drive);
+	}
+}
+
+static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
+			  const struct ide_port_info *d)
+{
+	hwif->channel = port;
+
+	hwif->chipset = d->chipset ? d->chipset : ide_pci;
+
+	if (d->init_iops)
+		d->init_iops(hwif);
+
+	/* ->host_flags may be set by ->init_iops (or even earlier...) */
+	hwif->host_flags |= d->host_flags;
+	hwif->pio_mask = d->pio_mask;
+
+	if (d->tp_ops)
+		hwif->tp_ops = d->tp_ops;
+
+	/* ->set_pio_mode for DTC2278 is currently limited to port 0 */
+	if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
+		hwif->port_ops = d->port_ops;
+
+	hwif->swdma_mask = d->swdma_mask;
+	hwif->mwdma_mask = d->mwdma_mask;
+	hwif->ultra_mask = d->udma_mask;
+
+	if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
+		int rc;
+
+		hwif->dma_ops = d->dma_ops;
+
+		if (d->init_dma)
+			rc = d->init_dma(hwif, d);
+		else
+			rc = ide_hwif_setup_dma(hwif, d);
+
+		if (rc < 0) {
+			printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
+
+			hwif->dma_ops = NULL;
+			hwif->dma_base = 0;
+			hwif->swdma_mask = 0;
+			hwif->mwdma_mask = 0;
+			hwif->ultra_mask = 0;
+		}
+	}
+
+	if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
+	    ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
+		hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
+
+	if (d->max_sectors)
+		hwif->rqsize = d->max_sectors;
+	else {
+		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
+			hwif->rqsize = 256;
+		else
+			hwif->rqsize = 65536;
+	}
+
+	/* call chipset specific routine for each enabled port */
+	if (d->init_hwif)
+		d->init_hwif(hwif);
+}
+
+static void ide_port_cable_detect(ide_hwif_t *hwif)
+{
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+
+	if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
+		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
+			hwif->cbl = port_ops->cable_detect(hwif);
+	}
+}
+
+/*
+ * Deferred request list insertion handler
+ */
+static void drive_rq_insert_work(struct work_struct *work)
+{
+	ide_drive_t *drive = container_of(work, ide_drive_t, rq_work);
+	ide_hwif_t *hwif = drive->hwif;
+	struct request *rq;
+	blk_status_t ret;
+	LIST_HEAD(list);
+
+	blk_mq_quiesce_queue(drive->queue);
+
+	ret = BLK_STS_OK;
+	spin_lock_irq(&hwif->lock);
+	while (!list_empty(&drive->rq_list)) {
+		rq = list_first_entry(&drive->rq_list, struct request, queuelist);
+		list_del_init(&rq->queuelist);
+
+		spin_unlock_irq(&hwif->lock);
+		ret = ide_issue_rq(drive, rq, true);
+		spin_lock_irq(&hwif->lock);
+	}
+	spin_unlock_irq(&hwif->lock);
+
+	blk_mq_unquiesce_queue(drive->queue);
+
+	if (ret != BLK_STS_OK)
+		kblockd_schedule_work(&drive->rq_work);
+}
+
+static const u8 ide_hwif_to_major[] =
+	{ IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
+	  IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
+
+static void ide_port_init_devices_data(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i;
+
+	ide_port_for_each_dev(i, drive, hwif) {
+		u8 j = (hwif->index * MAX_DRIVES) + i;
+		u16 *saved_id = drive->id;
+
+		memset(drive, 0, sizeof(*drive));
+		memset(saved_id, 0, SECTOR_SIZE);
+		drive->id = saved_id;
+
+		drive->media			= ide_disk;
+		drive->select			= (i << 4) | ATA_DEVICE_OBS;
+		drive->hwif			= hwif;
+		drive->ready_stat		= ATA_DRDY;
+		drive->bad_wstat		= BAD_W_STAT;
+		drive->special_flags		= IDE_SFLAG_RECALIBRATE |
+						  IDE_SFLAG_SET_GEOMETRY;
+		drive->name[0]			= 'h';
+		drive->name[1]			= 'd';
+		drive->name[2]			= 'a' + j;
+		drive->max_failures		= IDE_DEFAULT_MAX_FAILURES;
+
+		INIT_LIST_HEAD(&drive->list);
+		init_completion(&drive->gendev_rel_comp);
+
+		INIT_WORK(&drive->rq_work, drive_rq_insert_work);
+		INIT_LIST_HEAD(&drive->rq_list);
+	}
+}
+
+static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
+{
+	/* fill in any non-zero initial values */
+	hwif->index	= index;
+	hwif->major	= ide_hwif_to_major[index];
+
+	hwif->name[0]	= 'i';
+	hwif->name[1]	= 'd';
+	hwif->name[2]	= 'e';
+	hwif->name[3]	= '0' + index;
+
+	spin_lock_init(&hwif->lock);
+
+	timer_setup(&hwif->timer, ide_timer_expiry, 0);
+
+	init_completion(&hwif->gendev_rel_comp);
+
+	hwif->tp_ops = &default_tp_ops;
+
+	ide_port_init_devices_data(hwif);
+}
+
+static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
+{
+	memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
+	hwif->irq = hw->irq;
+	hwif->dev = hw->dev;
+	hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
+	hwif->config_data = hw->config;
+}
+
+static unsigned int ide_indexes;
+
+/**
+ *	ide_find_port_slot	-	find free port slot
+ *	@d: IDE port info
+ *
+ *	Return the new port slot index or -ENOENT if we are out of free slots.
+ */
+
+static int ide_find_port_slot(const struct ide_port_info *d)
+{
+	int idx = -ENOENT;
+	u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
+	u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
+
+	/*
+	 * Claim an unassigned slot.
+	 *
+	 * Give preference to claiming other slots before claiming ide0/ide1,
+	 * just in case there's another interface yet-to-be-scanned
+	 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
+	 *
+	 * Unless there is a bootable card that does not use the standard
+	 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
+	 */
+	mutex_lock(&ide_cfg_mtx);
+	if (bootable) {
+		if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
+			idx = ffz(ide_indexes | i);
+	} else {
+		if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
+			idx = ffz(ide_indexes | 3);
+		else if ((ide_indexes & 3) != 3)
+			idx = ffz(ide_indexes);
+	}
+	if (idx >= 0)
+		ide_indexes |= (1 << idx);
+	mutex_unlock(&ide_cfg_mtx);
+
+	return idx;
+}
+
+static void ide_free_port_slot(int idx)
+{
+	mutex_lock(&ide_cfg_mtx);
+	ide_indexes &= ~(1 << idx);
+	mutex_unlock(&ide_cfg_mtx);
+}
+
+static void ide_port_free_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i;
+
+	ide_port_for_each_dev(i, drive, hwif) {
+		kfree(drive->id);
+		kfree(drive);
+	}
+}
+
+static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
+{
+	ide_drive_t *drive;
+	int i;
+
+	for (i = 0; i < MAX_DRIVES; i++) {
+		drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
+		if (drive == NULL)
+			goto out_nomem;
+
+		/*
+		 * In order to keep things simple we have an id
+		 * block for all drives at all times. If the device
+		 * is pre ATA or refuses ATA/ATAPI identify we
+		 * will add faked data to this.
+		 *
+		 * Also note that 0 everywhere means "can't do X"
+		 */
+		drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
+		if (drive->id == NULL)
+			goto out_free_drive;
+
+		hwif->devices[i] = drive;
+	}
+	return 0;
+
+out_free_drive:
+	kfree(drive);
+out_nomem:
+	ide_port_free_devices(hwif);
+	return -ENOMEM;
+}
+
+struct ide_host *ide_host_alloc(const struct ide_port_info *d,
+				struct ide_hw **hws, unsigned int n_ports)
+{
+	struct ide_host *host;
+	struct device *dev = hws[0] ? hws[0]->dev : NULL;
+	int node = dev ? dev_to_node(dev) : -1;
+	int i;
+
+	host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
+	if (host == NULL)
+		return NULL;
+
+	for (i = 0; i < n_ports; i++) {
+		ide_hwif_t *hwif;
+		int idx;
+
+		if (hws[i] == NULL)
+			continue;
+
+		hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
+		if (hwif == NULL)
+			continue;
+
+		if (ide_port_alloc_devices(hwif, node) < 0) {
+			kfree(hwif);
+			continue;
+		}
+
+		idx = ide_find_port_slot(d);
+		if (idx < 0) {
+			printk(KERN_ERR "%s: no free slot for interface\n",
+					d ? d->name : "ide");
+			ide_port_free_devices(hwif);
+			kfree(hwif);
+			continue;
+		}
+
+		ide_init_port_data(hwif, idx);
+
+		hwif->host = host;
+
+		host->ports[i] = hwif;
+		host->n_ports++;
+	}
+
+	if (host->n_ports == 0) {
+		kfree(host);
+		return NULL;
+	}
+
+	host->dev[0] = dev;
+
+	if (d) {
+		host->init_chipset = d->init_chipset;
+		host->get_lock     = d->get_lock;
+		host->release_lock = d->release_lock;
+		host->host_flags = d->host_flags;
+		host->irq_flags = d->irq_flags;
+	}
+
+	return host;
+}
+EXPORT_SYMBOL_GPL(ide_host_alloc);
+
+static void ide_port_free(ide_hwif_t *hwif)
+{
+	ide_port_free_devices(hwif);
+	ide_free_port_slot(hwif->index);
+	kfree(hwif);
+}
+
+static void ide_disable_port(ide_hwif_t *hwif)
+{
+	struct ide_host *host = hwif->host;
+	int i;
+
+	printk(KERN_INFO "%s: disabling port\n", hwif->name);
+
+	for (i = 0; i < MAX_HOST_PORTS; i++) {
+		if (host->ports[i] == hwif) {
+			host->ports[i] = NULL;
+			host->n_ports--;
+		}
+	}
+
+	ide_port_free(hwif);
+}
+
+int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
+		      struct ide_hw **hws)
+{
+	ide_hwif_t *hwif, *mate = NULL;
+	int i, j = 0;
+
+	pr_warn("legacy IDE will be removed in 2021, please switch to libata\n"
+		"Report any missing HW support to linux-ide@vger.kernel.org\n");
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif == NULL) {
+			mate = NULL;
+			continue;
+		}
+
+		ide_init_port_hw(hwif, hws[i]);
+		ide_port_apply_params(hwif);
+
+		if ((i & 1) && mate) {
+			hwif->mate = mate;
+			mate->mate = hwif;
+		}
+
+		mate = (i & 1) ? NULL : hwif;
+
+		ide_init_port(hwif, i & 1, d);
+		ide_port_cable_detect(hwif);
+
+		hwif->port_flags |= IDE_PFLAG_PROBING;
+
+		ide_port_init_devices(hwif);
+	}
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif == NULL)
+			continue;
+
+		if (ide_probe_port(hwif) == 0)
+			hwif->present = 1;
+
+		hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
+		if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
+		    hwif->mate == NULL || hwif->mate->present == 0) {
+			if (ide_register_port(hwif)) {
+				ide_disable_port(hwif);
+				continue;
+			}
+		}
+
+		if (hwif->present)
+			ide_port_tune_devices(hwif);
+	}
+
+	ide_host_enable_irqs(host);
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif == NULL)
+			continue;
+
+		if (hwif_init(hwif) == 0) {
+			printk(KERN_INFO "%s: failed to initialize IDE "
+					 "interface\n", hwif->name);
+			device_unregister(hwif->portdev);
+			device_unregister(&hwif->gendev);
+			ide_disable_port(hwif);
+			continue;
+		}
+
+		if (hwif->present)
+			if (ide_port_setup_devices(hwif) == 0) {
+				hwif->present = 0;
+				continue;
+			}
+
+		j++;
+
+		ide_acpi_init_port(hwif);
+
+		if (hwif->present)
+			ide_acpi_port_init_devices(hwif);
+	}
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif == NULL)
+			continue;
+
+		ide_sysfs_register_port(hwif);
+		ide_proc_register_port(hwif);
+
+		if (hwif->present) {
+			ide_proc_port_register_devices(hwif);
+			hwif_register_devices(hwif);
+		}
+	}
+
+	return j ? 0 : -1;
+}
+EXPORT_SYMBOL_GPL(ide_host_register);
+
+int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
+		 unsigned int n_ports, struct ide_host **hostp)
+{
+	struct ide_host *host;
+	int rc;
+
+	host = ide_host_alloc(d, hws, n_ports);
+	if (host == NULL)
+		return -ENOMEM;
+
+	rc = ide_host_register(host, d, hws);
+	if (rc) {
+		ide_host_free(host);
+		return rc;
+	}
+
+	if (hostp)
+		*hostp = host;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_host_add);
+
+static void __ide_port_unregister_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i;
+
+	ide_port_for_each_present_dev(i, drive, hwif) {
+		device_unregister(&drive->gendev);
+		wait_for_completion(&drive->gendev_rel_comp);
+	}
+}
+
+void ide_port_unregister_devices(ide_hwif_t *hwif)
+{
+	mutex_lock(&ide_cfg_mtx);
+	__ide_port_unregister_devices(hwif);
+	hwif->present = 0;
+	ide_port_init_devices_data(hwif);
+	mutex_unlock(&ide_cfg_mtx);
+}
+EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
+
+/**
+ *	ide_unregister		-	free an IDE interface
+ *	@hwif: IDE interface
+ *
+ *	Perform the final unregister of an IDE interface.
+ *
+ *	Locking:
+ *	The caller must not hold the IDE locks.
+ *
+ *	It is up to the caller to be sure there is no pending I/O here,
+ *	and that the interface will not be reopened (present/vanishing
+ *	locking isn't yet done BTW).
+ */
+
+static void ide_unregister(ide_hwif_t *hwif)
+{
+	BUG_ON(in_interrupt());
+	BUG_ON(irqs_disabled());
+
+	mutex_lock(&ide_cfg_mtx);
+
+	if (hwif->present) {
+		__ide_port_unregister_devices(hwif);
+		hwif->present = 0;
+	}
+
+	ide_proc_unregister_port(hwif);
+
+	if (!hwif->host->get_lock)
+		free_irq(hwif->irq, hwif);
+
+	device_unregister(hwif->portdev);
+	device_unregister(&hwif->gendev);
+	wait_for_completion(&hwif->gendev_rel_comp);
+
+	/*
+	 * Remove us from the kernel's knowledge
+	 */
+	blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
+	kfree(hwif->sg_table);
+	unregister_blkdev(hwif->major, hwif->name);
+
+	ide_release_dma_engine(hwif);
+
+	mutex_unlock(&ide_cfg_mtx);
+}
+
+void ide_host_free(struct ide_host *host)
+{
+	ide_hwif_t *hwif;
+	int i;
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif)
+			ide_port_free(hwif);
+	}
+
+	kfree(host);
+}
+EXPORT_SYMBOL_GPL(ide_host_free);
+
+void ide_host_remove(struct ide_host *host)
+{
+	ide_hwif_t *hwif;
+	int i;
+
+	ide_host_for_each_port(i, hwif, host) {
+		if (hwif)
+			ide_unregister(hwif);
+	}
+
+	ide_host_free(host);
+}
+EXPORT_SYMBOL_GPL(ide_host_remove);
+
+void ide_port_scan(ide_hwif_t *hwif)
+{
+	int rc;
+
+	ide_port_apply_params(hwif);
+	ide_port_cable_detect(hwif);
+
+	hwif->port_flags |= IDE_PFLAG_PROBING;
+
+	ide_port_init_devices(hwif);
+
+	rc = ide_probe_port(hwif);
+
+	hwif->port_flags &= ~IDE_PFLAG_PROBING;
+
+	if (rc < 0)
+		return;
+
+	hwif->present = 1;
+
+	ide_port_tune_devices(hwif);
+	ide_port_setup_devices(hwif);
+	ide_acpi_port_init_devices(hwif);
+	hwif_register_devices(hwif);
+	ide_proc_port_register_devices(hwif);
+}
+EXPORT_SYMBOL_GPL(ide_port_scan);
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
new file mode 100644
index 000000000..15c17f378
--- /dev/null
+++ b/drivers/ide/ide-proc.c
@@ -0,0 +1,633 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1997-1998	Mark Lord
+ *  Copyright (C) 2003		Red Hat
+ *
+ *  Some code was moved here from ide.c, see it for original copyrights.
+ */
+
+/*
+ * This is the /proc/ide/ filesystem implementation.
+ *
+ * Drive/Driver settings can be retrieved by reading the drive's
+ * "settings" files.  e.g.    "cat /proc/ide0/hda/settings"
+ * To write a new value "val" into a specific setting "name", use:
+ *   echo "name:val" >/proc/ide/ide0/hda/settings
+ */
+
+#include <linux/module.h>
+
+#include <linux/uaccess.h>
+#include <linux/errno.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/ctype.h>
+#include <linux/ide.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+
+static struct proc_dir_entry *proc_ide_root;
+
+static int ide_imodel_proc_show(struct seq_file *m, void *v)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
+	const char	*name;
+
+	switch (hwif->chipset) {
+	case ide_generic:	name = "generic";	break;
+	case ide_pci:		name = "pci";		break;
+	case ide_cmd640:	name = "cmd640";	break;
+	case ide_dtc2278:	name = "dtc2278";	break;
+	case ide_ali14xx:	name = "ali14xx";	break;
+	case ide_qd65xx:	name = "qd65xx";	break;
+	case ide_umc8672:	name = "umc8672";	break;
+	case ide_ht6560b:	name = "ht6560b";	break;
+	case ide_4drives:	name = "4drives";	break;
+	case ide_pmac:		name = "mac-io";	break;
+	case ide_au1xxx:	name = "au1xxx";	break;
+	case ide_palm3710:      name = "palm3710";      break;
+	case ide_acorn:		name = "acorn";		break;
+	default:		name = "(unknown)";	break;
+	}
+	seq_printf(m, "%s\n", name);
+	return 0;
+}
+
+static int ide_mate_proc_show(struct seq_file *m, void *v)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
+
+	if (hwif && hwif->mate)
+		seq_printf(m, "%s\n", hwif->mate->name);
+	else
+		seq_printf(m, "(none)\n");
+	return 0;
+}
+
+static int ide_channel_proc_show(struct seq_file *m, void *v)
+{
+	ide_hwif_t	*hwif = (ide_hwif_t *) m->private;
+
+	seq_printf(m, "%c\n", hwif->channel ? '1' : '0');
+	return 0;
+}
+
+static int ide_identify_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t *drive = (ide_drive_t *)m->private;
+	u8 *buf;
+
+	if (!drive) {
+		seq_putc(m, '\n');
+		return 0;
+	}
+
+	buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	if (taskfile_lib_get_identify(drive, buf) == 0) {
+		__le16 *val = (__le16 *)buf;
+		int i;
+
+		for (i = 0; i < SECTOR_SIZE / 2; i++) {
+			seq_printf(m, "%04x%c", le16_to_cpu(val[i]),
+					(i % 8) == 7 ? '\n' : ' ');
+		}
+	} else
+		seq_putc(m, buf[0]);
+	kfree(buf);
+	return 0;
+}
+
+/**
+ *	ide_find_setting	-	find a specific setting
+ *	@st: setting table pointer
+ *	@name: setting name
+ *
+ *	Scan's the setting table for a matching entry and returns
+ *	this or NULL if no entry is found. The caller must hold the
+ *	setting semaphore
+ */
+
+static
+const struct ide_proc_devset *ide_find_setting(const struct ide_proc_devset *st,
+					       char *name)
+{
+	while (st->name) {
+		if (strcmp(st->name, name) == 0)
+			break;
+		st++;
+	}
+	return st->name ? st : NULL;
+}
+
+/**
+ *	ide_read_setting	-	read an IDE setting
+ *	@drive: drive to read from
+ *	@setting: drive setting
+ *
+ *	Read a drive setting and return the value. The caller
+ *	must hold the ide_setting_mtx when making this call.
+ *
+ *	BUGS: the data return and error are the same return value
+ *	so an error -EINVAL and true return of the same value cannot
+ *	be told apart
+ */
+
+static int ide_read_setting(ide_drive_t *drive,
+			    const struct ide_proc_devset *setting)
+{
+	const struct ide_devset *ds = setting->setting;
+	int val = -EINVAL;
+
+	if (ds->get)
+		val = ds->get(drive);
+
+	return val;
+}
+
+/**
+ *	ide_write_setting	-	read an IDE setting
+ *	@drive: drive to read from
+ *	@setting: drive setting
+ *	@val: value
+ *
+ *	Write a drive setting if it is possible. The caller
+ *	must hold the ide_setting_mtx when making this call.
+ *
+ *	BUGS: the data return and error are the same return value
+ *	so an error -EINVAL and true return of the same value cannot
+ *	be told apart
+ *
+ *	FIXME:  This should be changed to enqueue a special request
+ *	to the driver to change settings, and then wait on a sema for completion.
+ *	The current scheme of polling is kludgy, though safe enough.
+ */
+
+static int ide_write_setting(ide_drive_t *drive,
+			     const struct ide_proc_devset *setting, int val)
+{
+	const struct ide_devset *ds = setting->setting;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+	if (!ds->set)
+		return -EPERM;
+	if ((ds->flags & DS_SYNC)
+	    && (val < setting->min || val > setting->max))
+		return -EINVAL;
+	return ide_devset_execute(drive, ds, val);
+}
+
+ide_devset_get(xfer_rate, current_speed);
+
+static int set_xfer_rate (ide_drive_t *drive, int arg)
+{
+	struct ide_cmd cmd;
+
+	if (arg < XFER_PIO_0 || arg > XFER_UDMA_6)
+		return -EINVAL;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.command = ATA_CMD_SET_FEATURES;
+	cmd.tf.feature = SETFEATURES_XFER;
+	cmd.tf.nsect   = (u8)arg;
+	cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT;
+	cmd.valid.in.tf  = IDE_VALID_NSECT;
+	cmd.tf_flags   = IDE_TFLAG_SET_XFER;
+
+	return ide_no_data_taskfile(drive, &cmd);
+}
+
+ide_devset_rw(current_speed, xfer_rate);
+ide_devset_rw_field(init_speed, init_speed);
+ide_devset_rw_flag(nice1, IDE_DFLAG_NICE1);
+ide_devset_ro_field(number, dn);
+
+static const struct ide_proc_devset ide_generic_settings[] = {
+	IDE_PROC_DEVSET(current_speed, 0, 70),
+	IDE_PROC_DEVSET(init_speed, 0, 70),
+	IDE_PROC_DEVSET(io_32bit,  0, 1 + (SUPPORT_VLB_SYNC << 1)),
+	IDE_PROC_DEVSET(keepsettings, 0, 1),
+	IDE_PROC_DEVSET(nice1, 0, 1),
+	IDE_PROC_DEVSET(number, 0, 3),
+	IDE_PROC_DEVSET(pio_mode, 0, 255),
+	IDE_PROC_DEVSET(unmaskirq, 0, 1),
+	IDE_PROC_DEVSET(using_dma, 0, 1),
+	{ NULL },
+};
+
+static void proc_ide_settings_warn(void)
+{
+	printk_once(KERN_WARNING "Warning: /proc/ide/hd?/settings interface is "
+			    "obsolete, and will be removed soon!\n");
+}
+
+static int ide_settings_proc_show(struct seq_file *m, void *v)
+{
+	const struct ide_proc_devset *setting, *g, *d;
+	const struct ide_devset *ds;
+	ide_drive_t	*drive = (ide_drive_t *) m->private;
+	int		rc, mul_factor, div_factor;
+
+	proc_ide_settings_warn();
+
+	mutex_lock(&ide_setting_mtx);
+	g = ide_generic_settings;
+	d = drive->settings;
+	seq_printf(m, "name\t\t\tvalue\t\tmin\t\tmax\t\tmode\n");
+	seq_printf(m, "----\t\t\t-----\t\t---\t\t---\t\t----\n");
+	while (g->name || (d && d->name)) {
+		/* read settings in the alphabetical order */
+		if (g->name && d && d->name) {
+			if (strcmp(d->name, g->name) < 0)
+				setting = d++;
+			else
+				setting = g++;
+		} else if (d && d->name) {
+			setting = d++;
+		} else
+			setting = g++;
+		mul_factor = setting->mulf ? setting->mulf(drive) : 1;
+		div_factor = setting->divf ? setting->divf(drive) : 1;
+		seq_printf(m, "%-24s", setting->name);
+		rc = ide_read_setting(drive, setting);
+		if (rc >= 0)
+			seq_printf(m, "%-16d", rc * mul_factor / div_factor);
+		else
+			seq_printf(m, "%-16s", "write-only");
+		seq_printf(m, "%-16d%-16d", (setting->min * mul_factor + div_factor - 1) / div_factor, setting->max * mul_factor / div_factor);
+		ds = setting->setting;
+		if (ds->get)
+			seq_printf(m, "r");
+		if (ds->set)
+			seq_printf(m, "w");
+		seq_printf(m, "\n");
+	}
+	mutex_unlock(&ide_setting_mtx);
+	return 0;
+}
+
+static int ide_settings_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ide_settings_proc_show, PDE_DATA(inode));
+}
+
+#define MAX_LEN	30
+
+static ssize_t ide_settings_proc_write(struct file *file, const char __user *buffer,
+				       size_t count, loff_t *pos)
+{
+	ide_drive_t	*drive = PDE_DATA(file_inode(file));
+	char		name[MAX_LEN + 1];
+	int		for_real = 0, mul_factor, div_factor;
+	unsigned long	n;
+
+	const struct ide_proc_devset *setting;
+	char *buf, *s;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EACCES;
+
+	proc_ide_settings_warn();
+
+	if (count >= PAGE_SIZE)
+		return -EINVAL;
+
+	s = buf = (char *)__get_free_page(GFP_USER);
+	if (!buf)
+		return -ENOMEM;
+
+	if (copy_from_user(buf, buffer, count)) {
+		free_page((unsigned long)buf);
+		return -EFAULT;
+	}
+
+	buf[count] = '\0';
+
+	/*
+	 * Skip over leading whitespace
+	 */
+	while (count && isspace(*s)) {
+		--count;
+		++s;
+	}
+	/*
+	 * Do one full pass to verify all parameters,
+	 * then do another to actually write the new settings.
+	 */
+	do {
+		char *p = s;
+		n = count;
+		while (n > 0) {
+			unsigned val;
+			char *q = p;
+
+			while (n > 0 && *p != ':') {
+				--n;
+				p++;
+			}
+			if (*p != ':')
+				goto parse_error;
+			if (p - q > MAX_LEN)
+				goto parse_error;
+			memcpy(name, q, p - q);
+			name[p - q] = 0;
+
+			if (n > 0) {
+				--n;
+				p++;
+			} else
+				goto parse_error;
+
+			val = simple_strtoul(p, &q, 10);
+			n -= q - p;
+			p = q;
+			if (n > 0 && !isspace(*p))
+				goto parse_error;
+			while (n > 0 && isspace(*p)) {
+				--n;
+				++p;
+			}
+
+			mutex_lock(&ide_setting_mtx);
+			/* generic settings first, then driver specific ones */
+			setting = ide_find_setting(ide_generic_settings, name);
+			if (!setting) {
+				if (drive->settings)
+					setting = ide_find_setting(drive->settings, name);
+				if (!setting) {
+					mutex_unlock(&ide_setting_mtx);
+					goto parse_error;
+				}
+			}
+			if (for_real) {
+				mul_factor = setting->mulf ? setting->mulf(drive) : 1;
+				div_factor = setting->divf ? setting->divf(drive) : 1;
+				ide_write_setting(drive, setting, val * div_factor / mul_factor);
+			}
+			mutex_unlock(&ide_setting_mtx);
+		}
+	} while (!for_real++);
+	free_page((unsigned long)buf);
+	return count;
+parse_error:
+	free_page((unsigned long)buf);
+	printk("%s(): parse error\n", __func__);
+	return -EINVAL;
+}
+
+static const struct proc_ops ide_settings_proc_ops = {
+	.proc_open	= ide_settings_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= ide_settings_proc_write,
+};
+
+int ide_capacity_proc_show(struct seq_file *m, void *v)
+{
+	seq_printf(m, "%llu\n", (long long)0x7fffffff);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_capacity_proc_show);
+
+int ide_geometry_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t	*drive = (ide_drive_t *) m->private;
+
+	seq_printf(m, "physical     %d/%d/%d\n",
+			drive->cyl, drive->head, drive->sect);
+	seq_printf(m, "logical      %d/%d/%d\n",
+			drive->bios_cyl, drive->bios_head, drive->bios_sect);
+	return 0;
+}
+EXPORT_SYMBOL(ide_geometry_proc_show);
+
+static int ide_dmodel_proc_show(struct seq_file *seq, void *v)
+{
+	ide_drive_t	*drive = (ide_drive_t *) seq->private;
+	char		*m = (char *)&drive->id[ATA_ID_PROD];
+
+	seq_printf(seq, "%.40s\n", m[0] ? m : "(none)");
+	return 0;
+}
+
+static int ide_driver_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t		*drive = (ide_drive_t *)m->private;
+	struct device		*dev = &drive->gendev;
+	struct ide_driver	*ide_drv;
+
+	if (dev->driver) {
+		ide_drv = to_ide_driver(dev->driver);
+		seq_printf(m, "%s version %s\n",
+				dev->driver->name, ide_drv->version);
+	} else
+		seq_printf(m, "ide-default version 0.9.newide\n");
+	return 0;
+}
+
+static int ide_media_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t	*drive = (ide_drive_t *) m->private;
+	const char	*media;
+
+	switch (drive->media) {
+	case ide_disk:		media = "disk\n";	break;
+	case ide_cdrom:		media = "cdrom\n";	break;
+	case ide_tape:		media = "tape\n";	break;
+	case ide_floppy:	media = "floppy\n";	break;
+	case ide_optical:	media = "optical\n";	break;
+	default:		media = "UNKNOWN\n";	break;
+	}
+	seq_puts(m, media);
+	return 0;
+}
+
+static int ide_media_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ide_media_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations ide_media_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= ide_media_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static ide_proc_entry_t generic_drive_entries[] = {
+	{ "driver",	S_IFREG|S_IRUGO,	 ide_driver_proc_show	},
+	{ "identify",	S_IFREG|S_IRUSR,	 ide_identify_proc_show	},
+	{ "media",	S_IFREG|S_IRUGO,	 ide_media_proc_show	},
+	{ "model",	S_IFREG|S_IRUGO,	 ide_dmodel_proc_show	},
+	{}
+};
+
+static void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data)
+{
+	struct proc_dir_entry *ent;
+
+	if (!dir || !p)
+		return;
+	while (p->name != NULL) {
+		ent = proc_create_single_data(p->name, p->mode, dir, p->show, data);
+		if (!ent) return;
+		p++;
+	}
+}
+
+static void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p)
+{
+	if (!dir || !p)
+		return;
+	while (p->name != NULL) {
+		remove_proc_entry(p->name, dir);
+		p++;
+	}
+}
+
+void ide_proc_register_driver(ide_drive_t *drive, struct ide_driver *driver)
+{
+	mutex_lock(&ide_setting_mtx);
+	drive->settings = driver->proc_devsets(drive);
+	mutex_unlock(&ide_setting_mtx);
+
+	ide_add_proc_entries(drive->proc, driver->proc_entries(drive), drive);
+}
+
+EXPORT_SYMBOL(ide_proc_register_driver);
+
+/**
+ *	ide_proc_unregister_driver	-	remove driver specific data
+ *	@drive: drive
+ *	@driver: driver
+ *
+ *	Clean up the driver specific /proc files and IDE settings
+ *	for a given drive.
+ *
+ *	Takes ide_setting_mtx.
+ */
+
+void ide_proc_unregister_driver(ide_drive_t *drive, struct ide_driver *driver)
+{
+	ide_remove_proc_entries(drive->proc, driver->proc_entries(drive));
+
+	mutex_lock(&ide_setting_mtx);
+	/*
+	 * ide_setting_mtx protects both the settings list and the use
+	 * of settings (we cannot take a setting out that is being used).
+	 */
+	drive->settings = NULL;
+	mutex_unlock(&ide_setting_mtx);
+}
+EXPORT_SYMBOL(ide_proc_unregister_driver);
+
+void ide_proc_port_register_devices(ide_hwif_t *hwif)
+{
+	struct proc_dir_entry *ent;
+	struct proc_dir_entry *parent = hwif->proc;
+	ide_drive_t *drive;
+	char name[64];
+	int i;
+
+	ide_port_for_each_dev(i, drive, hwif) {
+		if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
+			continue;
+
+		drive->proc = proc_mkdir(drive->name, parent);
+		if (drive->proc) {
+			ide_add_proc_entries(drive->proc, generic_drive_entries, drive);
+			proc_create_data("settings", S_IFREG|S_IRUSR|S_IWUSR,
+					drive->proc, &ide_settings_proc_ops,
+					drive);
+		}
+		sprintf(name, "ide%d/%s", (drive->name[2]-'a')/2, drive->name);
+		ent = proc_symlink(drive->name, proc_ide_root, name);
+		if (!ent) return;
+	}
+}
+
+void ide_proc_unregister_device(ide_drive_t *drive)
+{
+	if (drive->proc) {
+		remove_proc_entry("settings", drive->proc);
+		ide_remove_proc_entries(drive->proc, generic_drive_entries);
+		remove_proc_entry(drive->name, proc_ide_root);
+		remove_proc_entry(drive->name, drive->hwif->proc);
+		drive->proc = NULL;
+	}
+}
+
+static ide_proc_entry_t hwif_entries[] = {
+	{ "channel",	S_IFREG|S_IRUGO,	ide_channel_proc_show	},
+	{ "mate",	S_IFREG|S_IRUGO,	ide_mate_proc_show	},
+	{ "model",	S_IFREG|S_IRUGO,	ide_imodel_proc_show	},
+	{}
+};
+
+void ide_proc_register_port(ide_hwif_t *hwif)
+{
+	if (!hwif->proc) {
+		hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
+
+		if (!hwif->proc)
+			return;
+
+		ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
+	}
+}
+
+void ide_proc_unregister_port(ide_hwif_t *hwif)
+{
+	if (hwif->proc) {
+		ide_remove_proc_entries(hwif->proc, hwif_entries);
+		remove_proc_entry(hwif->name, proc_ide_root);
+		hwif->proc = NULL;
+	}
+}
+
+static int proc_print_driver(struct device_driver *drv, void *data)
+{
+	struct ide_driver *ide_drv = to_ide_driver(drv);
+	struct seq_file *s = data;
+
+	seq_printf(s, "%s version %s\n", drv->name, ide_drv->version);
+
+	return 0;
+}
+
+static int ide_drivers_show(struct seq_file *s, void *p)
+{
+	int err;
+
+	err = bus_for_each_drv(&ide_bus_type, NULL, s, proc_print_driver);
+	if (err < 0)
+		printk(KERN_WARNING "IDE: %s: bus_for_each_drv error: %d\n",
+			__func__, err);
+	return 0;
+}
+
+DEFINE_PROC_SHOW_ATTRIBUTE(ide_drivers);
+
+void proc_ide_create(void)
+{
+	proc_ide_root = proc_mkdir("ide", NULL);
+
+	if (!proc_ide_root)
+		return;
+
+	proc_create("drivers", 0, proc_ide_root, &ide_drivers_proc_ops);
+}
+
+void proc_ide_destroy(void)
+{
+	remove_proc_entry("drivers", proc_ide_root);
+	remove_proc_entry("ide", NULL);
+}
diff --git a/drivers/ide/ide-scan-pci.c b/drivers/ide/ide-scan-pci.c
new file mode 100644
index 000000000..b0411a182
--- /dev/null
+++ b/drivers/ide/ide-scan-pci.c
@@ -0,0 +1,113 @@
+/*
+ * support for probing IDE PCI devices in the PCI bus order
+ *
+ * Copyright (c) 1998-2000  Andre Hedrick <andre@linux-ide.org>
+ * Copyright (c) 1995-1998  Mark Lord
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+/*
+ *	Module interfaces
+ */
+
+static int pre_init = 1;		/* Before first ordered IDE scan */
+static LIST_HEAD(ide_pci_drivers);
+
+/*
+ *	__ide_pci_register_driver	-	attach IDE driver
+ *	@driver: pci driver
+ *	@module: owner module of the driver
+ *
+ *	Registers a driver with the IDE layer. The IDE layer arranges that
+ *	boot time setup is done in the expected device order and then
+ *	hands the controllers off to the core PCI code to do the rest of
+ *	the work.
+ *
+ *	Returns are the same as for pci_register_driver
+ */
+
+int __ide_pci_register_driver(struct pci_driver *driver, struct module *module,
+			      const char *mod_name)
+{
+	if (!pre_init)
+		return __pci_register_driver(driver, module, mod_name);
+	driver->driver.owner = module;
+	list_add_tail(&driver->node, &ide_pci_drivers);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__ide_pci_register_driver);
+
+/**
+ *	ide_scan_pcidev		-	find an IDE driver for a device
+ *	@dev: PCI device to check
+ *
+ *	Look for an IDE driver to handle the device we are considering.
+ *	This is only used during boot up to get the ordering correct. After
+ *	boot up the pci layer takes over the job.
+ */
+
+static int __init ide_scan_pcidev(struct pci_dev *dev)
+{
+	struct list_head *l;
+	struct pci_driver *d;
+	int ret;
+
+	list_for_each(l, &ide_pci_drivers) {
+		d = list_entry(l, struct pci_driver, node);
+		if (d->id_table) {
+			const struct pci_device_id *id =
+				pci_match_id(d->id_table, dev);
+
+			if (id != NULL) {
+				pci_assign_irq(dev);
+				ret = d->probe(dev, id);
+				if (ret >= 0) {
+					dev->driver = d;
+					pci_dev_get(dev);
+					return 1;
+				}
+			}
+		}
+	}
+	return 0;
+}
+
+/**
+ *	ide_scan_pcibus		-	perform the initial IDE driver scan
+ *
+ *	Perform the initial bus rather than driver ordered scan of the
+ *	PCI drivers. After this all IDE pci handling becomes standard
+ *	module ordering not traditionally ordered.
+ */
+
+static int __init ide_scan_pcibus(void)
+{
+	struct pci_dev *dev = NULL;
+	struct pci_driver *d, *tmp;
+
+	pre_init = 0;
+	for_each_pci_dev(dev)
+		ide_scan_pcidev(dev);
+
+	/*
+	 *	Hand the drivers over to the PCI layer now we
+	 *	are post init.
+	 */
+
+	list_for_each_entry_safe(d, tmp, &ide_pci_drivers, node) {
+		list_del(&d->node);
+		if (__pci_register_driver(d, d->driver.owner,
+					  d->driver.mod_name))
+			printk(KERN_ERR "%s: failed to register %s driver\n",
+					__func__, d->driver.mod_name);
+	}
+
+	return 0;
+}
+device_initcall(ide_scan_pcibus);
diff --git a/drivers/ide/ide-sysfs.c b/drivers/ide/ide-sysfs.c
new file mode 100644
index 000000000..c08a8a091
--- /dev/null
+++ b/drivers/ide/ide-sysfs.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/ide.h>
+
+char *ide_media_string(ide_drive_t *drive)
+{
+	switch (drive->media) {
+	case ide_disk:
+		return "disk";
+	case ide_cdrom:
+		return "cdrom";
+	case ide_tape:
+		return "tape";
+	case ide_floppy:
+		return "floppy";
+	case ide_optical:
+		return "optical";
+	default:
+		return "UNKNOWN";
+	}
+}
+
+static ssize_t media_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "%s\n", ide_media_string(drive));
+}
+static DEVICE_ATTR_RO(media);
+
+static ssize_t drivename_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "%s\n", drive->name);
+}
+static DEVICE_ATTR_RO(drivename);
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "ide:m-%s\n", ide_media_string(drive));
+}
+static DEVICE_ATTR_RO(modalias);
+
+static ssize_t model_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_PROD]);
+}
+static DEVICE_ATTR_RO(model);
+
+static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_FW_REV]);
+}
+static DEVICE_ATTR_RO(firmware);
+
+static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	return sprintf(buf, "%s\n", (char *)&drive->id[ATA_ID_SERNO]);
+}
+static DEVICE_ATTR(serial, 0400, serial_show, NULL);
+
+static DEVICE_ATTR(unload_heads, 0644, ide_park_show, ide_park_store);
+
+static struct attribute *ide_attrs[] = {
+	&dev_attr_media.attr,
+	&dev_attr_drivename.attr,
+	&dev_attr_modalias.attr,
+	&dev_attr_model.attr,
+	&dev_attr_firmware.attr,
+	&dev_attr_serial.attr,
+	&dev_attr_unload_heads.attr,
+	NULL,
+};
+
+static const struct attribute_group ide_attr_group = {
+	.attrs = ide_attrs,
+};
+
+const struct attribute_group *ide_dev_groups[] = {
+	&ide_attr_group,
+	NULL,
+};
+
+static ssize_t store_delete_devices(struct device *portdev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t n)
+{
+	ide_hwif_t *hwif = dev_get_drvdata(portdev);
+
+	if (strncmp(buf, "1", n))
+		return -EINVAL;
+
+	ide_port_unregister_devices(hwif);
+
+	return n;
+};
+
+static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
+
+static ssize_t store_scan(struct device *portdev,
+			  struct device_attribute *attr,
+			  const char *buf, size_t n)
+{
+	ide_hwif_t *hwif = dev_get_drvdata(portdev);
+
+	if (strncmp(buf, "1", n))
+		return -EINVAL;
+
+	ide_port_unregister_devices(hwif);
+	ide_port_scan(hwif);
+
+	return n;
+};
+
+static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
+
+static struct device_attribute *ide_port_attrs[] = {
+	&dev_attr_delete_devices,
+	&dev_attr_scan,
+	NULL
+};
+
+int ide_sysfs_register_port(ide_hwif_t *hwif)
+{
+	int i, rc;
+
+	for (i = 0; ide_port_attrs[i]; i++) {
+		rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
+		if (rc)
+			break;
+	}
+
+	return rc;
+}
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
new file mode 100644
index 000000000..6f26634b2
--- /dev/null
+++ b/drivers/ide/ide-tape.c
@@ -0,0 +1,2085 @@
+/*
+ * IDE ATAPI streaming tape driver.
+ *
+ * Copyright (C) 1995-1999  Gadi Oxman <gadio@netvision.net.il>
+ * Copyright (C) 2003-2005  Bartlomiej Zolnierkiewicz
+ *
+ * This driver was constructed as a student project in the software laboratory
+ * of the faculty of electrical engineering in the Technion - Israel's
+ * Institute Of Technology, with the guide of Avner Lottem and Dr. Ilana David.
+ *
+ * It is hereby placed under the terms of the GNU general public license.
+ * (See linux/COPYING).
+ *
+ * For a historical changelog see
+ * Documentation/ide/ChangeLog.ide-tape.1995-2002
+ */
+
+#define DRV_NAME "ide-tape"
+
+#define IDETAPE_VERSION "1.20"
+
+#include <linux/compat.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/completion.h>
+#include <linux/bitops.h>
+#include <linux/mutex.h>
+#include <scsi/scsi.h>
+
+#include <asm/byteorder.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <asm/unaligned.h>
+#include <linux/mtio.h>
+
+/* define to see debug info */
+#undef IDETAPE_DEBUG_LOG
+
+#ifdef IDETAPE_DEBUG_LOG
+#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
+#else
+#define ide_debug_log(lvl, fmt, args...) do {} while (0)
+#endif
+
+/**************************** Tunable parameters *****************************/
+/*
+ * After each failed packet command we issue a request sense command and retry
+ * the packet command IDETAPE_MAX_PC_RETRIES times.
+ *
+ * Setting IDETAPE_MAX_PC_RETRIES to 0 will disable retries.
+ */
+#define IDETAPE_MAX_PC_RETRIES		3
+
+/*
+ * The following parameter is used to select the point in the internal tape fifo
+ * in which we will start to refill the buffer. Decreasing the following
+ * parameter will improve the system's latency and interactive response, while
+ * using a high value might improve system throughput.
+ */
+#define IDETAPE_FIFO_THRESHOLD		2
+
+/*
+ * DSC polling parameters.
+ *
+ * Polling for DSC (a single bit in the status register) is a very important
+ * function in ide-tape. There are two cases in which we poll for DSC:
+ *
+ * 1. Before a read/write packet command, to ensure that we can transfer data
+ * from/to the tape's data buffers, without causing an actual media access.
+ * In case the tape is not ready yet, we take out our request from the device
+ * request queue, so that ide.c could service requests from the other device
+ * on the same interface in the meantime.
+ *
+ * 2. After the successful initialization of a "media access packet command",
+ * which is a command that can take a long time to complete (the interval can
+ * range from several seconds to even an hour). Again, we postpone our request
+ * in the middle to free the bus for the other device. The polling frequency
+ * here should be lower than the read/write frequency since those media access
+ * commands are slow. We start from a "fast" frequency - IDETAPE_DSC_MA_FAST
+ * (1 second), and if we don't receive DSC after IDETAPE_DSC_MA_THRESHOLD
+ * (5 min), we switch it to a lower frequency - IDETAPE_DSC_MA_SLOW (1 min).
+ *
+ * We also set a timeout for the timer, in case something goes wrong. The
+ * timeout should be longer then the maximum execution time of a tape operation.
+ */
+
+/* DSC timings. */
+#define IDETAPE_DSC_RW_MIN		5*HZ/100	/* 50 msec */
+#define IDETAPE_DSC_RW_MAX		40*HZ/100	/* 400 msec */
+#define IDETAPE_DSC_RW_TIMEOUT		2*60*HZ		/* 2 minutes */
+#define IDETAPE_DSC_MA_FAST		2*HZ		/* 2 seconds */
+#define IDETAPE_DSC_MA_THRESHOLD	5*60*HZ		/* 5 minutes */
+#define IDETAPE_DSC_MA_SLOW		30*HZ		/* 30 seconds */
+#define IDETAPE_DSC_MA_TIMEOUT		2*60*60*HZ	/* 2 hours */
+
+/*************************** End of tunable parameters ***********************/
+
+/* tape directions */
+enum {
+	IDETAPE_DIR_NONE  = (1 << 0),
+	IDETAPE_DIR_READ  = (1 << 1),
+	IDETAPE_DIR_WRITE = (1 << 2),
+};
+
+/* Tape door status */
+#define DOOR_UNLOCKED			0
+#define DOOR_LOCKED			1
+#define DOOR_EXPLICITLY_LOCKED		2
+
+/* Some defines for the SPACE command */
+#define IDETAPE_SPACE_OVER_FILEMARK	1
+#define IDETAPE_SPACE_TO_EOD		3
+
+/* Some defines for the LOAD UNLOAD command */
+#define IDETAPE_LU_LOAD_MASK		1
+#define IDETAPE_LU_RETENSION_MASK	2
+#define IDETAPE_LU_EOT_MASK		4
+
+/* Structures related to the SELECT SENSE / MODE SENSE packet commands. */
+#define IDETAPE_BLOCK_DESCRIPTOR	0
+#define IDETAPE_CAPABILITIES_PAGE	0x2a
+
+/*
+ * Most of our global data which we need to save even as we leave the driver due
+ * to an interrupt or a timer event is stored in the struct defined below.
+ */
+typedef struct ide_tape_obj {
+	ide_drive_t		*drive;
+	struct ide_driver	*driver;
+	struct gendisk		*disk;
+	struct device		dev;
+
+	/* used by REQ_IDETAPE_{READ,WRITE} requests */
+	struct ide_atapi_pc queued_pc;
+
+	/*
+	 * DSC polling variables.
+	 *
+	 * While polling for DSC we use postponed_rq to postpone the current
+	 * request so that ide.c will be able to service pending requests on the
+	 * other device. Note that at most we will have only one DSC (usually
+	 * data transfer) request in the device request queue.
+	 */
+	bool postponed_rq;
+
+	/* The time in which we started polling for DSC */
+	unsigned long dsc_polling_start;
+	/* Timer used to poll for dsc */
+	struct timer_list dsc_timer;
+	/* Read/Write dsc polling frequency */
+	unsigned long best_dsc_rw_freq;
+	unsigned long dsc_poll_freq;
+	unsigned long dsc_timeout;
+
+	/* Read position information */
+	u8 partition;
+	/* Current block */
+	unsigned int first_frame;
+
+	/* Last error information */
+	u8 sense_key, asc, ascq;
+
+	/* Character device operation */
+	unsigned int minor;
+	/* device name */
+	char name[4];
+	/* Current character device data transfer direction */
+	u8 chrdev_dir;
+
+	/* tape block size, usually 512 or 1024 bytes */
+	unsigned short blk_size;
+	int user_bs_factor;
+
+	/* Copy of the tape's Capabilities and Mechanical Page */
+	u8 caps[20];
+
+	/*
+	 * Active data transfer request parameters.
+	 *
+	 * At most, there is only one ide-tape originated data transfer request
+	 * in the device request queue. This allows ide.c to easily service
+	 * requests from the other device when we postpone our active request.
+	 */
+
+	/* Data buffer size chosen based on the tape's recommendation */
+	int buffer_size;
+	/* Staging buffer of buffer_size bytes */
+	void *buf;
+	/* The read/write cursor */
+	void *cur;
+	/* The number of valid bytes in buf */
+	size_t valid;
+
+	/* Measures average tape speed */
+	unsigned long avg_time;
+	int avg_size;
+	int avg_speed;
+
+	/* the door is currently locked */
+	int door_locked;
+	/* the tape hardware is write protected */
+	char drv_write_prot;
+	/* the tape is write protected (hardware or opened as read-only) */
+	char write_prot;
+} idetape_tape_t;
+
+static DEFINE_MUTEX(ide_tape_mutex);
+static DEFINE_MUTEX(idetape_ref_mutex);
+
+static DEFINE_MUTEX(idetape_chrdev_mutex);
+
+static struct class *idetape_sysfs_class;
+
+static void ide_tape_release(struct device *);
+
+static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES];
+
+static struct ide_tape_obj *ide_tape_get(struct gendisk *disk, bool cdev,
+					 unsigned int i)
+{
+	struct ide_tape_obj *tape = NULL;
+
+	mutex_lock(&idetape_ref_mutex);
+
+	if (cdev)
+		tape = idetape_devs[i];
+	else
+		tape = ide_drv_g(disk, ide_tape_obj);
+
+	if (tape) {
+		if (ide_device_get(tape->drive))
+			tape = NULL;
+		else
+			get_device(&tape->dev);
+	}
+
+	mutex_unlock(&idetape_ref_mutex);
+	return tape;
+}
+
+static void ide_tape_put(struct ide_tape_obj *tape)
+{
+	ide_drive_t *drive = tape->drive;
+
+	mutex_lock(&idetape_ref_mutex);
+	put_device(&tape->dev);
+	ide_device_put(drive);
+	mutex_unlock(&idetape_ref_mutex);
+}
+
+/*
+ * called on each failed packet command retry to analyze the request sense. We
+ * currently do not utilize this information.
+ */
+static void idetape_analyze_error(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc *pc = drive->failed_pc;
+	struct request *rq = drive->hwif->rq;
+	u8 *sense = bio_data(rq->bio);
+
+	tape->sense_key = sense[2] & 0xF;
+	tape->asc       = sense[12];
+	tape->ascq      = sense[13];
+
+	ide_debug_log(IDE_DBG_FUNC,
+		      "cmd: 0x%x, sense key = %x, asc = %x, ascq = %x",
+		      rq->cmd[0], tape->sense_key, tape->asc, tape->ascq);
+
+	/* correct remaining bytes to transfer */
+	if (pc->flags & PC_FLAG_DMA_ERROR)
+		scsi_req(rq)->resid_len = tape->blk_size * get_unaligned_be32(&sense[3]);
+
+	/*
+	 * If error was the result of a zero-length read or write command,
+	 * with sense key=5, asc=0x22, ascq=0, let it slide.  Some drives
+	 * (i.e. Seagate STT3401A Travan) don't support 0-length read/writes.
+	 */
+	if ((pc->c[0] == READ_6 || pc->c[0] == WRITE_6)
+	    /* length == 0 */
+	    && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) {
+		if (tape->sense_key == 5) {
+			/* don't report an error, everything's ok */
+			pc->error = 0;
+			/* don't retry read/write */
+			pc->flags |= PC_FLAG_ABORT;
+		}
+	}
+	if (pc->c[0] == READ_6 && (sense[2] & 0x80)) {
+		pc->error = IDE_DRV_ERROR_FILEMARK;
+		pc->flags |= PC_FLAG_ABORT;
+	}
+	if (pc->c[0] == WRITE_6) {
+		if ((sense[2] & 0x40) || (tape->sense_key == 0xd
+		     && tape->asc == 0x0 && tape->ascq == 0x2)) {
+			pc->error = IDE_DRV_ERROR_EOD;
+			pc->flags |= PC_FLAG_ABORT;
+		}
+	}
+	if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
+		if (tape->sense_key == 8) {
+			pc->error = IDE_DRV_ERROR_EOD;
+			pc->flags |= PC_FLAG_ABORT;
+		}
+		if (!(pc->flags & PC_FLAG_ABORT) &&
+		    (blk_rq_bytes(rq) - scsi_req(rq)->resid_len))
+			pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
+	}
+}
+
+static void ide_tape_handle_dsc(ide_drive_t *);
+
+static int ide_tape_callback(ide_drive_t *drive, int dsc)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc *pc = drive->pc;
+	struct request *rq = drive->hwif->rq;
+	int uptodate = pc->error ? 0 : 1;
+	int err = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+
+	ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, dsc: %d, err: %d", rq->cmd[0],
+		      dsc, err);
+
+	if (dsc)
+		ide_tape_handle_dsc(drive);
+
+	if (drive->failed_pc == pc)
+		drive->failed_pc = NULL;
+
+	if (pc->c[0] == REQUEST_SENSE) {
+		if (uptodate)
+			idetape_analyze_error(drive);
+		else
+			printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
+					"itself - Aborting request!\n");
+	} else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
+		unsigned int blocks =
+			(blk_rq_bytes(rq) - scsi_req(rq)->resid_len) / tape->blk_size;
+
+		tape->avg_size += blocks * tape->blk_size;
+
+		if (time_after_eq(jiffies, tape->avg_time + HZ)) {
+			tape->avg_speed = tape->avg_size * HZ /
+				(jiffies - tape->avg_time) / 1024;
+			tape->avg_size = 0;
+			tape->avg_time = jiffies;
+		}
+
+		tape->first_frame += blocks;
+
+		if (pc->error) {
+			uptodate = 0;
+			err = pc->error;
+		}
+	}
+	scsi_req(rq)->result = err;
+
+	return uptodate;
+}
+
+/*
+ * Postpone the current request so that ide.c will be able to service requests
+ * from another device on the same port while we are polling for DSC.
+ */
+static void ide_tape_stall_queue(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, dsc_poll_freq: %lu",
+		      drive->hwif->rq->cmd[0], tape->dsc_poll_freq);
+
+	tape->postponed_rq = true;
+
+	ide_stall_queue(drive, tape->dsc_poll_freq);
+}
+
+static void ide_tape_handle_dsc(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	/* Media access command */
+	tape->dsc_polling_start = jiffies;
+	tape->dsc_poll_freq = IDETAPE_DSC_MA_FAST;
+	tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
+	/* Allow ide.c to handle other requests */
+	ide_tape_stall_queue(drive);
+}
+
+/*
+ * Packet Command Interface
+ *
+ * The current Packet Command is available in drive->pc, and will not change
+ * until we finish handling it. Each packet command is associated with a
+ * callback function that will be called when the command is finished.
+ *
+ * The handling will be done in three stages:
+ *
+ * 1. ide_tape_issue_pc will send the packet command to the drive, and will set
+ * the interrupt handler to ide_pc_intr.
+ *
+ * 2. On each interrupt, ide_pc_intr will be called. This step will be
+ * repeated until the device signals us that no more interrupts will be issued.
+ *
+ * 3. ATAPI Tape media access commands have immediate status with a delayed
+ * process. In case of a successful initiation of a media access packet command,
+ * the DSC bit will be set when the actual execution of the command is finished.
+ * Since the tape drive will not issue an interrupt, we have to poll for this
+ * event. In this case, we define the request as "low priority request" by
+ * setting rq_status to IDETAPE_RQ_POSTPONED, set a timer to poll for DSC and
+ * exit the driver.
+ *
+ * ide.c will then give higher priority to requests which originate from the
+ * other device, until will change rq_status to RQ_ACTIVE.
+ *
+ * 4. When the packet command is finished, it will be checked for errors.
+ *
+ * 5. In case an error was found, we queue a request sense packet command in
+ * front of the request queue and retry the operation up to
+ * IDETAPE_MAX_PC_RETRIES times.
+ *
+ * 6. In case no error was found, or we decided to give up and not to retry
+ * again, the callback function will be called and then we will handle the next
+ * request.
+ */
+
+static ide_startstop_t ide_tape_issue_pc(ide_drive_t *drive,
+					 struct ide_cmd *cmd,
+					 struct ide_atapi_pc *pc)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct request *rq = drive->hwif->rq;
+
+	if (drive->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
+		drive->failed_pc = pc;
+
+	/* Set the current packet command */
+	drive->pc = pc;
+
+	if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
+		(pc->flags & PC_FLAG_ABORT)) {
+
+		/*
+		 * We will "abort" retrying a packet command in case legitimate
+		 * error code was received (crossing a filemark, or end of the
+		 * media, for example).
+		 */
+		if (!(pc->flags & PC_FLAG_ABORT)) {
+			if (!(pc->c[0] == TEST_UNIT_READY &&
+			      tape->sense_key == 2 && tape->asc == 4 &&
+			     (tape->ascq == 1 || tape->ascq == 8))) {
+				printk(KERN_ERR "ide-tape: %s: I/O error, "
+						"pc = %2x, key = %2x, "
+						"asc = %2x, ascq = %2x\n",
+						tape->name, pc->c[0],
+						tape->sense_key, tape->asc,
+						tape->ascq);
+			}
+			/* Giving up */
+			pc->error = IDE_DRV_ERROR_GENERAL;
+		}
+
+		drive->failed_pc = NULL;
+		drive->pc_callback(drive, 0);
+		ide_complete_rq(drive, BLK_STS_IOERR, blk_rq_bytes(rq));
+		return ide_stopped;
+	}
+	ide_debug_log(IDE_DBG_SENSE, "retry #%d, cmd: 0x%02x", pc->retries,
+		      pc->c[0]);
+
+	pc->retries++;
+
+	return ide_issue_pc(drive, cmd);
+}
+
+/* A mode sense command is used to "sense" tape parameters. */
+static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
+{
+	ide_init_pc(pc);
+	pc->c[0] = MODE_SENSE;
+	if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
+		/* DBD = 1 - Don't return block descriptors */
+		pc->c[1] = 8;
+	pc->c[2] = page_code;
+	/*
+	 * Changed pc->c[3] to 0 (255 will at best return unused info).
+	 *
+	 * For SCSI this byte is defined as subpage instead of high byte
+	 * of length and some IDE drives seem to interpret it this way
+	 * and return an error when 255 is used.
+	 */
+	pc->c[3] = 0;
+	/* We will just discard data in that case */
+	pc->c[4] = 255;
+	if (page_code == IDETAPE_BLOCK_DESCRIPTOR)
+		pc->req_xfer = 12;
+	else if (page_code == IDETAPE_CAPABILITIES_PAGE)
+		pc->req_xfer = 24;
+	else
+		pc->req_xfer = 50;
+}
+
+static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc *pc = drive->pc;
+	u8 stat;
+
+	stat = hwif->tp_ops->read_status(hwif);
+
+	if (stat & ATA_DSC) {
+		if (stat & ATA_ERR) {
+			/* Error detected */
+			if (pc->c[0] != TEST_UNIT_READY)
+				printk(KERN_ERR "ide-tape: %s: I/O error, ",
+						tape->name);
+			/* Retry operation */
+			ide_retry_pc(drive);
+			return ide_stopped;
+		}
+		pc->error = 0;
+	} else {
+		pc->error = IDE_DRV_ERROR_GENERAL;
+		drive->failed_pc = NULL;
+	}
+	drive->pc_callback(drive, 0);
+	return ide_stopped;
+}
+
+static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
+				   struct ide_atapi_pc *pc, struct request *rq,
+				   u8 opcode)
+{
+	unsigned int length = blk_rq_sectors(rq) / (tape->blk_size >> 9);
+
+	ide_init_pc(pc);
+	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
+	pc->c[1] = 1;
+
+	if (blk_rq_bytes(rq) == tape->buffer_size)
+		pc->flags |= PC_FLAG_DMA_OK;
+
+	if (opcode == READ_6)
+		pc->c[0] = READ_6;
+	else if (opcode == WRITE_6) {
+		pc->c[0] = WRITE_6;
+		pc->flags |= PC_FLAG_WRITING;
+	}
+
+	memcpy(scsi_req(rq)->cmd, pc->c, 12);
+}
+
+static ide_startstop_t idetape_do_request(ide_drive_t *drive,
+					  struct request *rq, sector_t block)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc *pc = NULL;
+	struct ide_cmd cmd;
+	struct scsi_request *req = scsi_req(rq);
+	u8 stat;
+
+	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, sector: %llu, nr_sectors: %u",
+		      req->cmd[0], (unsigned long long)blk_rq_pos(rq),
+		      blk_rq_sectors(rq));
+
+	BUG_ON(!blk_rq_is_private(rq));
+	BUG_ON(ide_req(rq)->type != ATA_PRIV_MISC &&
+	       ide_req(rq)->type != ATA_PRIV_SENSE);
+
+	/* Retry a failed packet command */
+	if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
+		pc = drive->failed_pc;
+		goto out;
+	}
+
+	/*
+	 * If the tape is still busy, postpone our request and service
+	 * the other device meanwhile.
+	 */
+	stat = hwif->tp_ops->read_status(hwif);
+
+	if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
+	    (req->cmd[13] & REQ_IDETAPE_PC2) == 0)
+		drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
+
+	if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
+		drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
+		drive->dev_flags &= ~IDE_DFLAG_POST_RESET;
+	}
+
+	if (!(drive->atapi_flags & IDE_AFLAG_IGNORE_DSC) &&
+	    !(stat & ATA_DSC)) {
+		if (!tape->postponed_rq) {
+			tape->dsc_polling_start = jiffies;
+			tape->dsc_poll_freq = tape->best_dsc_rw_freq;
+			tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT;
+		} else if (time_after(jiffies, tape->dsc_timeout)) {
+			printk(KERN_ERR "ide-tape: %s: DSC timeout\n",
+				tape->name);
+			if (req->cmd[13] & REQ_IDETAPE_PC2) {
+				idetape_media_access_finished(drive);
+				return ide_stopped;
+			} else {
+				return ide_do_reset(drive);
+			}
+		} else if (time_after(jiffies,
+					tape->dsc_polling_start +
+					IDETAPE_DSC_MA_THRESHOLD))
+			tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW;
+		ide_tape_stall_queue(drive);
+		return ide_stopped;
+	} else {
+		drive->atapi_flags &= ~IDE_AFLAG_IGNORE_DSC;
+		tape->postponed_rq = false;
+	}
+
+	if (req->cmd[13] & REQ_IDETAPE_READ) {
+		pc = &tape->queued_pc;
+		ide_tape_create_rw_cmd(tape, pc, rq, READ_6);
+		goto out;
+	}
+	if (req->cmd[13] & REQ_IDETAPE_WRITE) {
+		pc = &tape->queued_pc;
+		ide_tape_create_rw_cmd(tape, pc, rq, WRITE_6);
+		goto out;
+	}
+	if (req->cmd[13] & REQ_IDETAPE_PC1) {
+		pc = (struct ide_atapi_pc *)ide_req(rq)->special;
+		req->cmd[13] &= ~(REQ_IDETAPE_PC1);
+		req->cmd[13] |= REQ_IDETAPE_PC2;
+		goto out;
+	}
+	if (req->cmd[13] & REQ_IDETAPE_PC2) {
+		idetape_media_access_finished(drive);
+		return ide_stopped;
+	}
+	BUG();
+
+out:
+	/* prepare sense request for this command */
+	ide_prep_sense(drive, rq);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	if (rq_data_dir(rq))
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+
+	cmd.rq = rq;
+
+	ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
+	ide_map_sg(drive, &cmd);
+
+	return ide_tape_issue_pc(drive, &cmd, pc);
+}
+
+/*
+ * Write a filemark if write_filemark=1. Flush the device buffers without
+ * writing a filemark otherwise.
+ */
+static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc, int write_filemark)
+{
+	ide_init_pc(pc);
+	pc->c[0] = WRITE_FILEMARKS;
+	pc->c[4] = write_filemark;
+	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
+}
+
+static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct gendisk *disk = tape->disk;
+	int load_attempted = 0;
+
+	/* Wait for the tape to become ready */
+	set_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT), &drive->atapi_flags);
+	timeout += jiffies;
+	while (time_before(jiffies, timeout)) {
+		if (ide_do_test_unit_ready(drive, disk) == 0)
+			return 0;
+		if ((tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2)
+		    || (tape->asc == 0x3A)) {
+			/* no media */
+			if (load_attempted)
+				return -ENOMEDIUM;
+			ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK);
+			load_attempted = 1;
+		/* not about to be ready */
+		} else if (!(tape->sense_key == 2 && tape->asc == 4 &&
+			     (tape->ascq == 1 || tape->ascq == 8)))
+			return -EIO;
+		msleep(100);
+	}
+	return -EIO;
+}
+
+static int idetape_flush_tape_buffers(ide_drive_t *drive)
+{
+	struct ide_tape_obj *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+	int rc;
+
+	idetape_create_write_filemark_cmd(drive, &pc, 0);
+	rc = ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0);
+	if (rc)
+		return rc;
+	idetape_wait_ready(drive, 60 * 5 * HZ);
+	return 0;
+}
+
+static int ide_tape_read_position(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+	u8 buf[20];
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	/* prep cmd */
+	ide_init_pc(&pc);
+	pc.c[0] = READ_POSITION;
+	pc.req_xfer = 20;
+
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer))
+		return -1;
+
+	if (!pc.error) {
+		ide_debug_log(IDE_DBG_FUNC, "BOP - %s",
+				(buf[0] & 0x80) ? "Yes" : "No");
+		ide_debug_log(IDE_DBG_FUNC, "EOP - %s",
+				(buf[0] & 0x40) ? "Yes" : "No");
+
+		if (buf[0] & 0x4) {
+			printk(KERN_INFO "ide-tape: Block location is unknown"
+					 "to the tape\n");
+			clear_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
+				  &drive->atapi_flags);
+			return -1;
+		} else {
+			ide_debug_log(IDE_DBG_FUNC, "Block Location: %u",
+				      be32_to_cpup((__be32 *)&buf[4]));
+
+			tape->partition = buf[1];
+			tape->first_frame = be32_to_cpup((__be32 *)&buf[4]);
+			set_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
+				&drive->atapi_flags);
+		}
+	}
+
+	return tape->first_frame;
+}
+
+static void idetape_create_locate_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc,
+		unsigned int block, u8 partition, int skip)
+{
+	ide_init_pc(pc);
+	pc->c[0] = POSITION_TO_ELEMENT;
+	pc->c[1] = 2;
+	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
+	pc->c[8] = partition;
+	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
+}
+
+static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	if (tape->chrdev_dir != IDETAPE_DIR_READ)
+		return;
+
+	clear_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags);
+	tape->valid = 0;
+	if (tape->buf != NULL) {
+		kfree(tape->buf);
+		tape->buf = NULL;
+	}
+
+	tape->chrdev_dir = IDETAPE_DIR_NONE;
+}
+
+/*
+ * Position the tape to the requested block using the LOCATE packet command.
+ * A READ POSITION command is then issued to check where we are positioned. Like
+ * all higher level operations, we queue the commands at the tail of the request
+ * queue and wait for their completion.
+ */
+static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
+		u8 partition, int skip)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct gendisk *disk = tape->disk;
+	int ret;
+	struct ide_atapi_pc pc;
+
+	if (tape->chrdev_dir == IDETAPE_DIR_READ)
+		__ide_tape_discard_merge_buffer(drive);
+	idetape_wait_ready(drive, 60 * 5 * HZ);
+	idetape_create_locate_cmd(drive, &pc, block, partition, skip);
+	ret = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+	if (ret)
+		return ret;
+
+	ret = ide_tape_read_position(drive);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
+					  int restore_position)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	int seek, position;
+
+	__ide_tape_discard_merge_buffer(drive);
+	if (restore_position) {
+		position = ide_tape_read_position(drive);
+		seek = position > 0 ? position : 0;
+		if (idetape_position_tape(drive, seek, 0, 0)) {
+			printk(KERN_INFO "ide-tape: %s: position_tape failed in"
+					 " %s\n", tape->name, __func__);
+			return;
+		}
+	}
+}
+
+/*
+ * Generate a read/write request for the block device interface and wait for it
+ * to be serviced.
+ */
+static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct request *rq;
+	int ret;
+
+	ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, size: %d", cmd, size);
+
+	BUG_ON(cmd != REQ_IDETAPE_READ && cmd != REQ_IDETAPE_WRITE);
+	BUG_ON(size < 0 || size % tape->blk_size);
+
+	rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_MISC;
+	scsi_req(rq)->cmd[13] = cmd;
+	rq->rq_disk = tape->disk;
+	rq->__sector = tape->first_frame;
+
+	if (size) {
+		ret = blk_rq_map_kern(drive->queue, rq, tape->buf, size,
+				      GFP_NOIO);
+		if (ret)
+			goto out_put;
+	}
+
+	blk_execute_rq(drive->queue, tape->disk, rq, 0);
+
+	/* calculate the number of transferred bytes and update buffer state */
+	size -= scsi_req(rq)->resid_len;
+	tape->cur = tape->buf;
+	if (cmd == REQ_IDETAPE_READ)
+		tape->valid = size;
+	else
+		tape->valid = 0;
+
+	ret = size;
+	if (scsi_req(rq)->result == IDE_DRV_ERROR_GENERAL)
+		ret = -EIO;
+out_put:
+	blk_put_request(rq);
+	return ret;
+}
+
+static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
+{
+	ide_init_pc(pc);
+	pc->c[0] = INQUIRY;
+	pc->c[4] = 254;
+	pc->req_xfer = 254;
+}
+
+static void idetape_create_rewind_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc)
+{
+	ide_init_pc(pc);
+	pc->c[0] = REZERO_UNIT;
+	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
+}
+
+static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
+{
+	ide_init_pc(pc);
+	pc->c[0] = ERASE;
+	pc->c[1] = 1;
+	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
+}
+
+static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
+{
+	ide_init_pc(pc);
+	pc->c[0] = SPACE;
+	put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
+	pc->c[1] = cmd;
+	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
+}
+
+static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
+		printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer"
+				" but we are not writing.\n");
+		return;
+	}
+	if (tape->buf) {
+		size_t aligned = roundup(tape->valid, tape->blk_size);
+
+		memset(tape->cur, 0, aligned - tape->valid);
+		idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, aligned);
+		kfree(tape->buf);
+		tape->buf = NULL;
+	}
+	tape->chrdev_dir = IDETAPE_DIR_NONE;
+}
+
+static int idetape_init_rw(ide_drive_t *drive, int dir)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	int rc;
+
+	BUG_ON(dir != IDETAPE_DIR_READ && dir != IDETAPE_DIR_WRITE);
+
+	if (tape->chrdev_dir == dir)
+		return 0;
+
+	if (tape->chrdev_dir == IDETAPE_DIR_READ)
+		ide_tape_discard_merge_buffer(drive, 1);
+	else if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
+		ide_tape_flush_merge_buffer(drive);
+		idetape_flush_tape_buffers(drive);
+	}
+
+	if (tape->buf || tape->valid) {
+		printk(KERN_ERR "ide-tape: valid should be 0 now\n");
+		tape->valid = 0;
+	}
+
+	tape->buf = kmalloc(tape->buffer_size, GFP_KERNEL);
+	if (!tape->buf)
+		return -ENOMEM;
+	tape->chrdev_dir = dir;
+	tape->cur = tape->buf;
+
+	/*
+	 * Issue a 0 rw command to ensure that DSC handshake is
+	 * switched from completion mode to buffer available mode.  No
+	 * point in issuing this if DSC overlap isn't supported, some
+	 * drives (Seagate STT3401A) will return an error.
+	 */
+	if (drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) {
+		int cmd = dir == IDETAPE_DIR_READ ? REQ_IDETAPE_READ
+						  : REQ_IDETAPE_WRITE;
+
+		rc = idetape_queue_rw_tail(drive, cmd, 0);
+		if (rc < 0) {
+			kfree(tape->buf);
+			tape->buf = NULL;
+			tape->chrdev_dir = IDETAPE_DIR_NONE;
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	memset(tape->buf, 0, tape->buffer_size);
+
+	while (bcount) {
+		unsigned int count = min(tape->buffer_size, bcount);
+
+		idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, count);
+		bcount -= count;
+	}
+}
+
+/*
+ * Rewinds the tape to the Beginning Of the current Partition (BOP). We
+ * currently support only one partition.
+ */
+static int idetape_rewind_tape(ide_drive_t *drive)
+{
+	struct ide_tape_obj *tape = drive->driver_data;
+	struct gendisk *disk = tape->disk;
+	struct ide_atapi_pc pc;
+	int ret;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	idetape_create_rewind_cmd(drive, &pc);
+	ret = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+	if (ret)
+		return ret;
+
+	ret = ide_tape_read_position(drive);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+/* mtio.h compatible commands should be issued to the chrdev interface. */
+static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd,
+				unsigned long arg)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	void __user *argp = (void __user *)arg;
+
+	struct idetape_config {
+		int dsc_rw_frequency;
+		int dsc_media_access_frequency;
+		int nr_stages;
+	} config;
+
+	ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%04x", cmd);
+
+	switch (cmd) {
+	case 0x0340:
+		if (copy_from_user(&config, argp, sizeof(config)))
+			return -EFAULT;
+		tape->best_dsc_rw_freq = config.dsc_rw_frequency;
+		break;
+	case 0x0350:
+		memset(&config, 0, sizeof(config));
+		config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq;
+		config.nr_stages = 1;
+		if (copy_to_user(argp, &config, sizeof(config)))
+			return -EFAULT;
+		break;
+	default:
+		return -EIO;
+	}
+	return 0;
+}
+
+static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
+					int mt_count)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct gendisk *disk = tape->disk;
+	struct ide_atapi_pc pc;
+	int retval, count = 0;
+	int sprev = !!(tape->caps[4] & 0x20);
+
+
+	ide_debug_log(IDE_DBG_FUNC, "mt_op: %d, mt_count: %d", mt_op, mt_count);
+
+	if (mt_count == 0)
+		return 0;
+	if (MTBSF == mt_op || MTBSFM == mt_op) {
+		if (!sprev)
+			return -EIO;
+		mt_count = -mt_count;
+	}
+
+	if (tape->chrdev_dir == IDETAPE_DIR_READ) {
+		tape->valid = 0;
+		if (test_and_clear_bit(ilog2(IDE_AFLAG_FILEMARK),
+				       &drive->atapi_flags))
+			++count;
+		ide_tape_discard_merge_buffer(drive, 0);
+	}
+
+	switch (mt_op) {
+	case MTFSF:
+	case MTBSF:
+		idetape_create_space_cmd(&pc, mt_count - count,
+					 IDETAPE_SPACE_OVER_FILEMARK);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+	case MTFSFM:
+	case MTBSFM:
+		if (!sprev)
+			return -EIO;
+		retval = idetape_space_over_filemarks(drive, MTFSF,
+						      mt_count - count);
+		if (retval)
+			return retval;
+		count = (MTBSFM == mt_op ? 1 : -1);
+		return idetape_space_over_filemarks(drive, MTFSF, count);
+	default:
+		printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",
+				mt_op);
+		return -EIO;
+	}
+}
+
+/*
+ * Our character device read / write functions.
+ *
+ * The tape is optimized to maximize throughput when it is transferring an
+ * integral number of the "continuous transfer limit", which is a parameter of
+ * the specific tape (26kB on my particular tape, 32kB for Onstream).
+ *
+ * As of version 1.3 of the driver, the character device provides an abstract
+ * continuous view of the media - any mix of block sizes (even 1 byte) on the
+ * same backup/restore procedure is supported. The driver will internally
+ * convert the requests to the recommended transfer unit, so that an unmatch
+ * between the user's block size to the recommended size will only result in a
+ * (slightly) increased driver overhead, but will no longer hit performance.
+ * This is not applicable to Onstream.
+ */
+static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
+				   size_t count, loff_t *ppos)
+{
+	struct ide_tape_obj *tape = file->private_data;
+	ide_drive_t *drive = tape->drive;
+	size_t done = 0;
+	ssize_t ret = 0;
+	int rc;
+
+	ide_debug_log(IDE_DBG_FUNC, "count %zd", count);
+
+	if (tape->chrdev_dir != IDETAPE_DIR_READ) {
+		if (test_bit(ilog2(IDE_AFLAG_DETECT_BS), &drive->atapi_flags))
+			if (count > tape->blk_size &&
+			    (count % tape->blk_size) == 0)
+				tape->user_bs_factor = count / tape->blk_size;
+	}
+
+	rc = idetape_init_rw(drive, IDETAPE_DIR_READ);
+	if (rc < 0)
+		return rc;
+
+	while (done < count) {
+		size_t todo;
+
+		/* refill if staging buffer is empty */
+		if (!tape->valid) {
+			/* If we are at a filemark, nothing more to read */
+			if (test_bit(ilog2(IDE_AFLAG_FILEMARK),
+				     &drive->atapi_flags))
+				break;
+			/* read */
+			if (idetape_queue_rw_tail(drive, REQ_IDETAPE_READ,
+						  tape->buffer_size) <= 0)
+				break;
+		}
+
+		/* copy out */
+		todo = min_t(size_t, count - done, tape->valid);
+		if (copy_to_user(buf + done, tape->cur, todo))
+			ret = -EFAULT;
+
+		tape->cur += todo;
+		tape->valid -= todo;
+		done += todo;
+	}
+
+	if (!done && test_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags)) {
+		idetape_space_over_filemarks(drive, MTFSF, 1);
+		return 0;
+	}
+
+	return ret ? ret : done;
+}
+
+static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
+				     size_t count, loff_t *ppos)
+{
+	struct ide_tape_obj *tape = file->private_data;
+	ide_drive_t *drive = tape->drive;
+	size_t done = 0;
+	ssize_t ret = 0;
+	int rc;
+
+	/* The drive is write protected. */
+	if (tape->write_prot)
+		return -EACCES;
+
+	ide_debug_log(IDE_DBG_FUNC, "count %zd", count);
+
+	/* Initialize write operation */
+	rc = idetape_init_rw(drive, IDETAPE_DIR_WRITE);
+	if (rc < 0)
+		return rc;
+
+	while (done < count) {
+		size_t todo;
+
+		/* flush if staging buffer is full */
+		if (tape->valid == tape->buffer_size &&
+		    idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
+					  tape->buffer_size) <= 0)
+			return rc;
+
+		/* copy in */
+		todo = min_t(size_t, count - done,
+			     tape->buffer_size - tape->valid);
+		if (copy_from_user(tape->cur, buf + done, todo))
+			ret = -EFAULT;
+
+		tape->cur += todo;
+		tape->valid += todo;
+		done += todo;
+	}
+
+	return ret ? ret : done;
+}
+
+static int idetape_write_filemark(ide_drive_t *drive)
+{
+	struct ide_tape_obj *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+
+	/* Write a filemark */
+	idetape_create_write_filemark_cmd(drive, &pc, 1);
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0)) {
+		printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
+		return -EIO;
+	}
+	return 0;
+}
+
+/*
+ * Called from idetape_chrdev_ioctl when the general mtio MTIOCTOP ioctl is
+ * requested.
+ *
+ * Note: MTBSF and MTBSFM are not supported when the tape doesn't support
+ * spacing over filemarks in the reverse direction. In this case, MTFSFM is also
+ * usually not supported.
+ *
+ * The following commands are currently not supported:
+ *
+ * MTFSS, MTBSS, MTWSM, MTSETDENSITY, MTSETDRVBUFFER, MT_ST_BOOLEANS,
+ * MT_ST_WRITE_THRESHOLD.
+ */
+static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct gendisk *disk = tape->disk;
+	struct ide_atapi_pc pc;
+	int i, retval;
+
+	ide_debug_log(IDE_DBG_FUNC, "MTIOCTOP ioctl: mt_op: %d, mt_count: %d",
+		      mt_op, mt_count);
+
+	switch (mt_op) {
+	case MTFSF:
+	case MTFSFM:
+	case MTBSF:
+	case MTBSFM:
+		if (!mt_count)
+			return 0;
+		return idetape_space_over_filemarks(drive, mt_op, mt_count);
+	default:
+		break;
+	}
+
+	switch (mt_op) {
+	case MTWEOF:
+		if (tape->write_prot)
+			return -EACCES;
+		ide_tape_discard_merge_buffer(drive, 1);
+		for (i = 0; i < mt_count; i++) {
+			retval = idetape_write_filemark(drive);
+			if (retval)
+				return retval;
+		}
+		return 0;
+	case MTREW:
+		ide_tape_discard_merge_buffer(drive, 0);
+		if (idetape_rewind_tape(drive))
+			return -EIO;
+		return 0;
+	case MTLOAD:
+		ide_tape_discard_merge_buffer(drive, 0);
+		return ide_do_start_stop(drive, disk, IDETAPE_LU_LOAD_MASK);
+	case MTUNLOAD:
+	case MTOFFL:
+		/*
+		 * If door is locked, attempt to unlock before
+		 * attempting to eject.
+		 */
+		if (tape->door_locked) {
+			if (!ide_set_media_lock(drive, disk, 0))
+				tape->door_locked = DOOR_UNLOCKED;
+		}
+		ide_tape_discard_merge_buffer(drive, 0);
+		retval = ide_do_start_stop(drive, disk, !IDETAPE_LU_LOAD_MASK);
+		if (!retval)
+			clear_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
+				  &drive->atapi_flags);
+		return retval;
+	case MTNOP:
+		ide_tape_discard_merge_buffer(drive, 0);
+		return idetape_flush_tape_buffers(drive);
+	case MTRETEN:
+		ide_tape_discard_merge_buffer(drive, 0);
+		return ide_do_start_stop(drive, disk,
+			IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
+	case MTEOM:
+		idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+	case MTERASE:
+		(void)idetape_rewind_tape(drive);
+		idetape_create_erase_cmd(&pc);
+		return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+	case MTSETBLK:
+		if (mt_count) {
+			if (mt_count < tape->blk_size ||
+			    mt_count % tape->blk_size)
+				return -EIO;
+			tape->user_bs_factor = mt_count / tape->blk_size;
+			clear_bit(ilog2(IDE_AFLAG_DETECT_BS),
+				  &drive->atapi_flags);
+		} else
+			set_bit(ilog2(IDE_AFLAG_DETECT_BS),
+				&drive->atapi_flags);
+		return 0;
+	case MTSEEK:
+		ide_tape_discard_merge_buffer(drive, 0);
+		return idetape_position_tape(drive,
+			mt_count * tape->user_bs_factor, tape->partition, 0);
+	case MTSETPART:
+		ide_tape_discard_merge_buffer(drive, 0);
+		return idetape_position_tape(drive, 0, mt_count, 0);
+	case MTFSR:
+	case MTBSR:
+	case MTLOCK:
+		retval = ide_set_media_lock(drive, disk, 1);
+		if (retval)
+			return retval;
+		tape->door_locked = DOOR_EXPLICITLY_LOCKED;
+		return 0;
+	case MTUNLOCK:
+		retval = ide_set_media_lock(drive, disk, 0);
+		if (retval)
+			return retval;
+		tape->door_locked = DOOR_UNLOCKED;
+		return 0;
+	default:
+		printk(KERN_ERR "ide-tape: MTIO operation %d not supported\n",
+				mt_op);
+		return -EIO;
+	}
+}
+
+/*
+ * Our character device ioctls. General mtio.h magnetic io commands are
+ * supported here, and not in the corresponding block interface. Our own
+ * ide-tape ioctls are supported on both interfaces.
+ */
+static long do_idetape_chrdev_ioctl(struct file *file,
+				unsigned int cmd, unsigned long arg)
+{
+	struct ide_tape_obj *tape = file->private_data;
+	ide_drive_t *drive = tape->drive;
+	struct mtop mtop;
+	struct mtget mtget;
+	struct mtpos mtpos;
+	int block_offset = 0, position = tape->first_frame;
+	void __user *argp = (void __user *)arg;
+
+	ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x", cmd);
+
+	if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
+		ide_tape_flush_merge_buffer(drive);
+		idetape_flush_tape_buffers(drive);
+	}
+	if (cmd == MTIOCGET || cmd == MTIOCPOS) {
+		block_offset = tape->valid /
+			(tape->blk_size * tape->user_bs_factor);
+		position = ide_tape_read_position(drive);
+		if (position < 0)
+			return -EIO;
+	}
+	switch (cmd) {
+	case MTIOCTOP:
+		if (copy_from_user(&mtop, argp, sizeof(struct mtop)))
+			return -EFAULT;
+		return idetape_mtioctop(drive, mtop.mt_op, mtop.mt_count);
+	case MTIOCGET:
+		memset(&mtget, 0, sizeof(struct mtget));
+		mtget.mt_type = MT_ISSCSI2;
+		mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
+		mtget.mt_dsreg =
+			((tape->blk_size * tape->user_bs_factor)
+			 << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
+
+		if (tape->drv_write_prot)
+			mtget.mt_gstat |= GMT_WR_PROT(0xffffffff);
+
+		return put_user_mtget(argp, &mtget);
+	case MTIOCPOS:
+		mtpos.mt_blkno = position / tape->user_bs_factor - block_offset;
+		return put_user_mtpos(argp, &mtpos);
+	default:
+		if (tape->chrdev_dir == IDETAPE_DIR_READ)
+			ide_tape_discard_merge_buffer(drive, 1);
+		return idetape_blkdev_ioctl(drive, cmd, arg);
+	}
+}
+
+static long idetape_chrdev_ioctl(struct file *file,
+				unsigned int cmd, unsigned long arg)
+{
+	long ret;
+	mutex_lock(&ide_tape_mutex);
+	ret = do_idetape_chrdev_ioctl(file, cmd, arg);
+	mutex_unlock(&ide_tape_mutex);
+	return ret;
+}
+
+static long idetape_chrdev_compat_ioctl(struct file *file,
+				unsigned int cmd, unsigned long arg)
+{
+	long ret;
+
+	if (cmd == MTIOCPOS32)
+		cmd = MTIOCPOS;
+	else if (cmd == MTIOCGET32)
+		cmd = MTIOCGET;
+
+	mutex_lock(&ide_tape_mutex);
+	ret = do_idetape_chrdev_ioctl(file, cmd, arg);
+	mutex_unlock(&ide_tape_mutex);
+	return ret;
+}
+
+/*
+ * Do a mode sense page 0 with block descriptor and if it succeeds set the tape
+ * block size with the reported value.
+ */
+static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+	u8 buf[12];
+
+	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer)) {
+		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
+		if (tape->blk_size == 0) {
+			printk(KERN_WARNING "ide-tape: Cannot deal with zero "
+					    "block size, assuming 32k\n");
+			tape->blk_size = 32768;
+		}
+		return;
+	}
+	tape->blk_size = (buf[4 + 5] << 16) +
+				(buf[4 + 6] << 8)  +
+				 buf[4 + 7];
+	tape->drv_write_prot = (buf[2] & 0x80) >> 7;
+
+	ide_debug_log(IDE_DBG_FUNC, "blk_size: %d, write_prot: %d",
+		      tape->blk_size, tape->drv_write_prot);
+}
+
+static int idetape_chrdev_open(struct inode *inode, struct file *filp)
+{
+	unsigned int minor = iminor(inode), i = minor & ~0xc0;
+	ide_drive_t *drive;
+	idetape_tape_t *tape;
+	int retval;
+
+	if (i >= MAX_HWIFS * MAX_DRIVES)
+		return -ENXIO;
+
+	mutex_lock(&idetape_chrdev_mutex);
+
+	tape = ide_tape_get(NULL, true, i);
+	if (!tape) {
+		mutex_unlock(&idetape_chrdev_mutex);
+		return -ENXIO;
+	}
+
+	drive = tape->drive;
+	filp->private_data = tape;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	/*
+	 * We really want to do nonseekable_open(inode, filp); here, but some
+	 * versions of tar incorrectly call lseek on tapes and bail out if that
+	 * fails.  So we disallow pread() and pwrite(), but permit lseeks.
+	 */
+	filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
+
+
+	if (test_and_set_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags)) {
+		retval = -EBUSY;
+		goto out_put_tape;
+	}
+
+	retval = idetape_wait_ready(drive, 60 * HZ);
+	if (retval) {
+		clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
+		printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
+		goto out_put_tape;
+	}
+
+	ide_tape_read_position(drive);
+	if (!test_bit(ilog2(IDE_AFLAG_ADDRESS_VALID), &drive->atapi_flags))
+		(void)idetape_rewind_tape(drive);
+
+	/* Read block size and write protect status from drive. */
+	ide_tape_get_bsize_from_bdesc(drive);
+
+	/* Set write protect flag if device is opened as read-only. */
+	if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
+		tape->write_prot = 1;
+	else
+		tape->write_prot = tape->drv_write_prot;
+
+	/* Make sure drive isn't write protected if user wants to write. */
+	if (tape->write_prot) {
+		if ((filp->f_flags & O_ACCMODE) == O_WRONLY ||
+		    (filp->f_flags & O_ACCMODE) == O_RDWR) {
+			clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
+			retval = -EROFS;
+			goto out_put_tape;
+		}
+	}
+
+	/* Lock the tape drive door so user can't eject. */
+	if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
+		if (!ide_set_media_lock(drive, tape->disk, 1)) {
+			if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
+				tape->door_locked = DOOR_LOCKED;
+		}
+	}
+	mutex_unlock(&idetape_chrdev_mutex);
+
+	return 0;
+
+out_put_tape:
+	ide_tape_put(tape);
+
+	mutex_unlock(&idetape_chrdev_mutex);
+
+	return retval;
+}
+
+static void idetape_write_release(ide_drive_t *drive, unsigned int minor)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	ide_tape_flush_merge_buffer(drive);
+	tape->buf = kmalloc(tape->buffer_size, GFP_KERNEL);
+	if (tape->buf != NULL) {
+		idetape_pad_zeros(drive, tape->blk_size *
+				(tape->user_bs_factor - 1));
+		kfree(tape->buf);
+		tape->buf = NULL;
+	}
+	idetape_write_filemark(drive);
+	idetape_flush_tape_buffers(drive);
+	idetape_flush_tape_buffers(drive);
+}
+
+static int idetape_chrdev_release(struct inode *inode, struct file *filp)
+{
+	struct ide_tape_obj *tape = filp->private_data;
+	ide_drive_t *drive = tape->drive;
+	unsigned int minor = iminor(inode);
+
+	mutex_lock(&idetape_chrdev_mutex);
+
+	tape = drive->driver_data;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
+		idetape_write_release(drive, minor);
+	if (tape->chrdev_dir == IDETAPE_DIR_READ) {
+		if (minor < 128)
+			ide_tape_discard_merge_buffer(drive, 1);
+	}
+
+	if (minor < 128 && test_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
+				    &drive->atapi_flags))
+		(void) idetape_rewind_tape(drive);
+
+	if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
+		if (tape->door_locked == DOOR_LOCKED) {
+			if (!ide_set_media_lock(drive, tape->disk, 0))
+				tape->door_locked = DOOR_UNLOCKED;
+		}
+	}
+	clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
+	ide_tape_put(tape);
+
+	mutex_unlock(&idetape_chrdev_mutex);
+
+	return 0;
+}
+
+static void idetape_get_inquiry_results(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+	u8 pc_buf[256];
+	char fw_rev[4], vendor_id[8], product_id[16];
+
+	idetape_create_inquiry_cmd(&pc);
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, pc_buf, pc.req_xfer)) {
+		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
+				tape->name);
+		return;
+	}
+	memcpy(vendor_id, &pc_buf[8], 8);
+	memcpy(product_id, &pc_buf[16], 16);
+	memcpy(fw_rev, &pc_buf[32], 4);
+
+	ide_fixstring(vendor_id, 8, 0);
+	ide_fixstring(product_id, 16, 0);
+	ide_fixstring(fw_rev, 4, 0);
+
+	printk(KERN_INFO "ide-tape: %s <-> %s: %.8s %.16s rev %.4s\n",
+			drive->name, tape->name, vendor_id, product_id, fw_rev);
+}
+
+/*
+ * Ask the tape about its various parameters. In particular, we will adjust our
+ * data transfer buffer	size to the recommended value as returned by the tape.
+ */
+static void idetape_get_mode_sense_results(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	struct ide_atapi_pc pc;
+	u8 buf[24], *caps;
+	u8 speed, max_speed;
+
+	idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
+	if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer)) {
+		printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
+				" some default values\n");
+		tape->blk_size = 512;
+		put_unaligned(52,   (u16 *)&tape->caps[12]);
+		put_unaligned(540,  (u16 *)&tape->caps[14]);
+		put_unaligned(6*52, (u16 *)&tape->caps[16]);
+		return;
+	}
+	caps = buf + 4 + buf[3];
+
+	/* convert to host order and save for later use */
+	speed = be16_to_cpup((__be16 *)&caps[14]);
+	max_speed = be16_to_cpup((__be16 *)&caps[8]);
+
+	*(u16 *)&caps[8] = max_speed;
+	*(u16 *)&caps[12] = be16_to_cpup((__be16 *)&caps[12]);
+	*(u16 *)&caps[14] = speed;
+	*(u16 *)&caps[16] = be16_to_cpup((__be16 *)&caps[16]);
+
+	if (!speed) {
+		printk(KERN_INFO "ide-tape: %s: invalid tape speed "
+				"(assuming 650KB/sec)\n", drive->name);
+		*(u16 *)&caps[14] = 650;
+	}
+	if (!max_speed) {
+		printk(KERN_INFO "ide-tape: %s: invalid max_speed "
+				"(assuming 650KB/sec)\n", drive->name);
+		*(u16 *)&caps[8] = 650;
+	}
+
+	memcpy(&tape->caps, caps, 20);
+
+	/* device lacks locking support according to capabilities page */
+	if ((caps[6] & 1) == 0)
+		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
+
+	if (caps[7] & 0x02)
+		tape->blk_size = 512;
+	else if (caps[7] & 0x04)
+		tape->blk_size = 1024;
+}
+
+#ifdef CONFIG_IDE_PROC_FS
+#define ide_tape_devset_get(name, field) \
+static int get_##name(ide_drive_t *drive) \
+{ \
+	idetape_tape_t *tape = drive->driver_data; \
+	return tape->field; \
+}
+
+#define ide_tape_devset_set(name, field) \
+static int set_##name(ide_drive_t *drive, int arg) \
+{ \
+	idetape_tape_t *tape = drive->driver_data; \
+	tape->field = arg; \
+	return 0; \
+}
+
+#define ide_tape_devset_rw_field(_name, _field) \
+ide_tape_devset_get(_name, _field) \
+ide_tape_devset_set(_name, _field) \
+IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
+
+#define ide_tape_devset_r_field(_name, _field) \
+ide_tape_devset_get(_name, _field) \
+IDE_DEVSET(_name, 0, get_##_name, NULL)
+
+static int mulf_tdsc(ide_drive_t *drive)	{ return 1000; }
+static int divf_tdsc(ide_drive_t *drive)	{ return   HZ; }
+static int divf_buffer(ide_drive_t *drive)	{ return    2; }
+static int divf_buffer_size(ide_drive_t *drive)	{ return 1024; }
+
+ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
+
+ide_tape_devset_rw_field(tdsc, best_dsc_rw_freq);
+
+ide_tape_devset_r_field(avg_speed, avg_speed);
+ide_tape_devset_r_field(speed, caps[14]);
+ide_tape_devset_r_field(buffer, caps[16]);
+ide_tape_devset_r_field(buffer_size, buffer_size);
+
+static const struct ide_proc_devset idetape_settings[] = {
+	__IDE_PROC_DEVSET(avg_speed,	0, 0xffff, NULL, NULL),
+	__IDE_PROC_DEVSET(buffer,	0, 0xffff, NULL, divf_buffer),
+	__IDE_PROC_DEVSET(buffer_size,	0, 0xffff, NULL, divf_buffer_size),
+	__IDE_PROC_DEVSET(dsc_overlap,	0,      1, NULL, NULL),
+	__IDE_PROC_DEVSET(speed,	0, 0xffff, NULL, NULL),
+	__IDE_PROC_DEVSET(tdsc,		IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX,
+					mulf_tdsc, divf_tdsc),
+	{ NULL },
+};
+#endif
+
+/*
+ * The function below is called to:
+ *
+ * 1. Initialize our various state variables.
+ * 2. Ask the tape for its capabilities.
+ * 3. Allocate a buffer which will be used for data transfer. The buffer size
+ * is chosen based on the recommendation which we received in step 2.
+ *
+ * Note that at this point ide.c already assigned us an irq, so that we can
+ * queue requests here and wait for their completion.
+ */
+static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
+{
+	unsigned long t;
+	int speed;
+	u16 *ctl = (u16 *)&tape->caps[12];
+
+	ide_debug_log(IDE_DBG_FUNC, "minor: %d", minor);
+
+	drive->pc_callback = ide_tape_callback;
+
+	drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
+
+	if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
+		printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
+				 tape->name);
+		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+	}
+
+	/* Seagate Travan drives do not support DSC overlap. */
+	if (strstr((char *)&drive->id[ATA_ID_PROD], "Seagate STT3401"))
+		drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+
+	tape->minor = minor;
+	tape->name[0] = 'h';
+	tape->name[1] = 't';
+	tape->name[2] = '0' + minor;
+	tape->chrdev_dir = IDETAPE_DIR_NONE;
+
+	idetape_get_inquiry_results(drive);
+	idetape_get_mode_sense_results(drive);
+	ide_tape_get_bsize_from_bdesc(drive);
+	tape->user_bs_factor = 1;
+	tape->buffer_size = *ctl * tape->blk_size;
+	while (tape->buffer_size > 0xffff) {
+		printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
+		*ctl /= 2;
+		tape->buffer_size = *ctl * tape->blk_size;
+	}
+
+	/* select the "best" DSC read/write polling freq */
+	speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
+
+	t = (IDETAPE_FIFO_THRESHOLD * tape->buffer_size * HZ) / (speed * 1000);
+
+	/*
+	 * Ensure that the number we got makes sense; limit it within
+	 * IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX.
+	 */
+	tape->best_dsc_rw_freq = clamp_t(unsigned long, t, IDETAPE_DSC_RW_MIN,
+					 IDETAPE_DSC_RW_MAX);
+	printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
+		"%ums tDSC%s\n",
+		drive->name, tape->name, *(u16 *)&tape->caps[14],
+		(*(u16 *)&tape->caps[16] * 512) / tape->buffer_size,
+		tape->buffer_size / 1024,
+		jiffies_to_msecs(tape->best_dsc_rw_freq),
+		(drive->dev_flags & IDE_DFLAG_USING_DMA) ? ", DMA" : "");
+
+	ide_proc_register_driver(drive, tape->driver);
+}
+
+static void ide_tape_remove(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+
+	ide_proc_unregister_driver(drive, tape->driver);
+	device_del(&tape->dev);
+	ide_unregister_region(tape->disk);
+
+	mutex_lock(&idetape_ref_mutex);
+	put_device(&tape->dev);
+	mutex_unlock(&idetape_ref_mutex);
+}
+
+static void ide_tape_release(struct device *dev)
+{
+	struct ide_tape_obj *tape = to_ide_drv(dev, ide_tape_obj);
+	ide_drive_t *drive = tape->drive;
+	struct gendisk *g = tape->disk;
+
+	BUG_ON(tape->valid);
+
+	drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP;
+	drive->driver_data = NULL;
+	device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor));
+	device_destroy(idetape_sysfs_class,
+			MKDEV(IDETAPE_MAJOR, tape->minor + 128));
+	idetape_devs[tape->minor] = NULL;
+	g->private_data = NULL;
+	put_disk(g);
+	kfree(tape);
+}
+
+#ifdef CONFIG_IDE_PROC_FS
+static int idetape_name_proc_show(struct seq_file *m, void *v)
+{
+	ide_drive_t	*drive = (ide_drive_t *) m->private;
+	idetape_tape_t	*tape = drive->driver_data;
+
+	seq_printf(m, "%s\n", tape->name);
+	return 0;
+}
+
+static ide_proc_entry_t idetape_proc[] = {
+	{ "capacity",	S_IFREG|S_IRUGO,	ide_capacity_proc_show	},
+	{ "name",	S_IFREG|S_IRUGO,	idetape_name_proc_show	},
+	{}
+};
+
+static ide_proc_entry_t *ide_tape_proc_entries(ide_drive_t *drive)
+{
+	return idetape_proc;
+}
+
+static const struct ide_proc_devset *ide_tape_proc_devsets(ide_drive_t *drive)
+{
+	return idetape_settings;
+}
+#endif
+
+static int ide_tape_probe(ide_drive_t *);
+
+static struct ide_driver idetape_driver = {
+	.gen_driver = {
+		.owner		= THIS_MODULE,
+		.name		= "ide-tape",
+		.bus		= &ide_bus_type,
+	},
+	.probe			= ide_tape_probe,
+	.remove			= ide_tape_remove,
+	.version		= IDETAPE_VERSION,
+	.do_request		= idetape_do_request,
+#ifdef CONFIG_IDE_PROC_FS
+	.proc_entries		= ide_tape_proc_entries,
+	.proc_devsets		= ide_tape_proc_devsets,
+#endif
+};
+
+/* Our character device supporting functions, passed to register_chrdev. */
+static const struct file_operations idetape_fops = {
+	.owner		= THIS_MODULE,
+	.read		= idetape_chrdev_read,
+	.write		= idetape_chrdev_write,
+	.unlocked_ioctl	= idetape_chrdev_ioctl,
+	.compat_ioctl	= IS_ENABLED(CONFIG_COMPAT) ?
+			  idetape_chrdev_compat_ioctl : NULL,
+	.open		= idetape_chrdev_open,
+	.release	= idetape_chrdev_release,
+	.llseek		= noop_llseek,
+};
+
+static int idetape_open(struct block_device *bdev, fmode_t mode)
+{
+	struct ide_tape_obj *tape;
+
+	mutex_lock(&ide_tape_mutex);
+	tape = ide_tape_get(bdev->bd_disk, false, 0);
+	mutex_unlock(&ide_tape_mutex);
+
+	if (!tape)
+		return -ENXIO;
+
+	return 0;
+}
+
+static void idetape_release(struct gendisk *disk, fmode_t mode)
+{
+	struct ide_tape_obj *tape = ide_drv_g(disk, ide_tape_obj);
+
+	mutex_lock(&ide_tape_mutex);
+	ide_tape_put(tape);
+	mutex_unlock(&ide_tape_mutex);
+}
+
+static int idetape_ioctl(struct block_device *bdev, fmode_t mode,
+			unsigned int cmd, unsigned long arg)
+{
+	struct ide_tape_obj *tape = ide_drv_g(bdev->bd_disk, ide_tape_obj);
+	ide_drive_t *drive = tape->drive;
+	int err;
+
+	mutex_lock(&ide_tape_mutex);
+	err = generic_ide_ioctl(drive, bdev, cmd, arg);
+	if (err == -EINVAL)
+		err = idetape_blkdev_ioctl(drive, cmd, arg);
+	mutex_unlock(&ide_tape_mutex);
+
+	return err;
+}
+
+static int idetape_compat_ioctl(struct block_device *bdev, fmode_t mode,
+				unsigned int cmd, unsigned long arg)
+{
+        if (cmd == 0x0340 || cmd == 0x350)
+		arg = (unsigned long)compat_ptr(arg);
+
+	return idetape_ioctl(bdev, mode, cmd, arg);
+}
+
+static const struct block_device_operations idetape_block_ops = {
+	.owner		= THIS_MODULE,
+	.open		= idetape_open,
+	.release	= idetape_release,
+	.ioctl		= idetape_ioctl,
+	.compat_ioctl	= IS_ENABLED(CONFIG_COMPAT) ?
+				idetape_compat_ioctl : NULL,
+};
+
+static int ide_tape_probe(ide_drive_t *drive)
+{
+	idetape_tape_t *tape;
+	struct gendisk *g;
+	int minor;
+
+	ide_debug_log(IDE_DBG_FUNC, "enter");
+
+	if (!strstr(DRV_NAME, drive->driver_req))
+		goto failed;
+
+	if (drive->media != ide_tape)
+		goto failed;
+
+	if ((drive->dev_flags & IDE_DFLAG_ID_READ) &&
+	    ide_check_atapi_device(drive, DRV_NAME) == 0) {
+		printk(KERN_ERR "ide-tape: %s: not supported by this version of"
+				" the driver\n", drive->name);
+		goto failed;
+	}
+	tape = kzalloc(sizeof(idetape_tape_t), GFP_KERNEL);
+	if (tape == NULL) {
+		printk(KERN_ERR "ide-tape: %s: Can't allocate a tape struct\n",
+				drive->name);
+		goto failed;
+	}
+
+	g = alloc_disk(1 << PARTN_BITS);
+	if (!g)
+		goto out_free_tape;
+
+	ide_init_disk(g, drive);
+
+	tape->dev.parent = &drive->gendev;
+	tape->dev.release = ide_tape_release;
+	dev_set_name(&tape->dev, "%s", dev_name(&drive->gendev));
+
+	if (device_register(&tape->dev))
+		goto out_free_disk;
+
+	tape->drive = drive;
+	tape->driver = &idetape_driver;
+	tape->disk = g;
+
+	g->private_data = &tape->driver;
+
+	drive->driver_data = tape;
+
+	mutex_lock(&idetape_ref_mutex);
+	for (minor = 0; idetape_devs[minor]; minor++)
+		;
+	idetape_devs[minor] = tape;
+	mutex_unlock(&idetape_ref_mutex);
+
+	idetape_setup(drive, tape, minor);
+
+	device_create(idetape_sysfs_class, &drive->gendev,
+		      MKDEV(IDETAPE_MAJOR, minor), NULL, "%s", tape->name);
+	device_create(idetape_sysfs_class, &drive->gendev,
+		      MKDEV(IDETAPE_MAJOR, minor + 128), NULL,
+		      "n%s", tape->name);
+
+	g->fops = &idetape_block_ops;
+	ide_register_region(g);
+
+	return 0;
+
+out_free_disk:
+	put_disk(g);
+out_free_tape:
+	kfree(tape);
+failed:
+	return -ENODEV;
+}
+
+static void __exit idetape_exit(void)
+{
+	driver_unregister(&idetape_driver.gen_driver);
+	class_destroy(idetape_sysfs_class);
+	unregister_chrdev(IDETAPE_MAJOR, "ht");
+}
+
+static int __init idetape_init(void)
+{
+	int error = 1;
+	idetape_sysfs_class = class_create(THIS_MODULE, "ide_tape");
+	if (IS_ERR(idetape_sysfs_class)) {
+		idetape_sysfs_class = NULL;
+		printk(KERN_ERR "Unable to create sysfs class for ide tapes\n");
+		error = -EBUSY;
+		goto out;
+	}
+
+	if (register_chrdev(IDETAPE_MAJOR, "ht", &idetape_fops)) {
+		printk(KERN_ERR "ide-tape: Failed to register chrdev"
+				" interface\n");
+		error = -EBUSY;
+		goto out_free_class;
+	}
+
+	error = driver_register(&idetape_driver.gen_driver);
+	if (error)
+		goto out_free_chrdev;
+
+	return 0;
+
+out_free_chrdev:
+	unregister_chrdev(IDETAPE_MAJOR, "ht");
+out_free_class:
+	class_destroy(idetape_sysfs_class);
+out:
+	return error;
+}
+
+MODULE_ALIAS("ide:*m-tape*");
+module_init(idetape_init);
+module_exit(idetape_exit);
+MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR);
+MODULE_DESCRIPTION("ATAPI Streaming TAPE Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
new file mode 100644
index 000000000..d016cbe68
--- /dev/null
+++ b/drivers/ide/ide-taskfile.c
@@ -0,0 +1,668 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2000-2002	   Michael Cornwell <cornwell@acm.org>
+ *  Copyright (C) 2000-2002	   Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2001-2002	   Klaus Smolin
+ *					IBM Storage Technology Division
+ *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
+ *
+ *  The big the bad and the ugly.
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hdreg.h>
+#include <linux/ide.h>
+#include <linux/nmi.h>
+#include <linux/scatterlist.h>
+#include <linux/uaccess.h>
+
+#include <asm/io.h>
+
+void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+
+	/* Be sure we're looking at the low order bytes */
+	tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+	tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
+
+	if (cmd->tf_flags & IDE_TFLAG_LBA48) {
+		tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
+
+		tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
+	}
+}
+
+void ide_tf_dump(const char *s, struct ide_cmd *cmd)
+{
+#ifdef DEBUG
+	printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
+		"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
+	       s, cmd->tf.feature, cmd->tf.nsect,
+	       cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
+	       cmd->tf.device, cmd->tf.command);
+	printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
+	       s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
+#endif
+}
+
+int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
+{
+	struct ide_cmd cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+	cmd.tf.nsect = 0x01;
+	if (drive->media == ide_disk)
+		cmd.tf.command = ATA_CMD_ID_ATA;
+	else
+		cmd.tf.command = ATA_CMD_ID_ATAPI;
+	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
+	cmd.protocol = ATA_PROT_PIO;
+
+	return ide_raw_taskfile(drive, &cmd, buf, 1);
+}
+
+static ide_startstop_t task_no_data_intr(ide_drive_t *);
+static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
+static ide_startstop_t task_pio_intr(ide_drive_t *);
+
+ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
+	struct ide_taskfile *tf = &cmd->tf;
+	ide_handler_t *handler = NULL;
+	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+	const struct ide_dma_ops *dma_ops = hwif->dma_ops;
+
+	if (orig_cmd->protocol == ATA_PROT_PIO &&
+	    (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
+	    drive->mult_count == 0) {
+		pr_err("%s: multimode not set!\n", drive->name);
+		return ide_stopped;
+	}
+
+	if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
+		orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
+
+	memcpy(cmd, orig_cmd, sizeof(*cmd));
+
+	if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
+		ide_tf_dump(drive->name, cmd);
+		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+
+		if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
+			u8 data[2] = { cmd->tf.data, cmd->hob.data };
+
+			tp_ops->output_data(drive, cmd, data, 2);
+		}
+
+		if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
+			u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
+				  0xE0 : 0xEF;
+
+			if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
+				cmd->tf.device &= HIHI;
+			cmd->tf.device |= drive->select;
+		}
+
+		tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
+		tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
+	}
+
+	switch (cmd->protocol) {
+	case ATA_PROT_PIO:
+		if (cmd->tf_flags & IDE_TFLAG_WRITE) {
+			tp_ops->exec_command(hwif, tf->command);
+			ndelay(400);	/* FIXME */
+			return pre_task_out_intr(drive, cmd);
+		}
+		handler = task_pio_intr;
+		fallthrough;
+	case ATA_PROT_NODATA:
+		if (handler == NULL)
+			handler = task_no_data_intr;
+		ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
+		return ide_started;
+	case ATA_PROT_DMA:
+		if (ide_dma_prepare(drive, cmd))
+			return ide_stopped;
+		hwif->expiry = dma_ops->dma_timer_expiry;
+		ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
+		dma_ops->dma_start(drive);
+		fallthrough;
+	default:
+		return ide_started;
+	}
+}
+EXPORT_SYMBOL_GPL(do_rw_taskfile);
+
+static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &hwif->cmd;
+	struct ide_taskfile *tf = &cmd->tf;
+	int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
+	int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
+	u8 stat;
+
+	local_irq_enable_in_hardirq();
+
+	while (1) {
+		stat = hwif->tp_ops->read_status(hwif);
+		if ((stat & ATA_BUSY) == 0 || retries-- == 0)
+			break;
+		udelay(10);
+	};
+
+	if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
+		if (custom && tf->command == ATA_CMD_SET_MULTI) {
+			drive->mult_req = drive->mult_count = 0;
+			drive->special_flags |= IDE_SFLAG_RECALIBRATE;
+			(void)ide_dump_status(drive, __func__, stat);
+			return ide_stopped;
+		} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
+			if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
+				ide_set_handler(drive, &task_no_data_intr,
+						WAIT_WORSTCASE);
+				return ide_started;
+			}
+		}
+		return ide_error(drive, "task_no_data_intr", stat);
+	}
+
+	if (custom && tf->command == ATA_CMD_SET_MULTI)
+		drive->mult_count = drive->mult_req;
+
+	if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
+	    tf->command == ATA_CMD_CHK_POWER) {
+		struct request *rq = hwif->rq;
+
+		if (ata_pm_request(rq))
+			ide_complete_pm_rq(drive, rq);
+		else
+			ide_finish_cmd(drive, cmd, stat);
+	}
+
+	return ide_stopped;
+}
+
+static u8 wait_drive_not_busy(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	int retries;
+	u8 stat;
+
+	/*
+	 * Last sector was transferred, wait until device is ready.  This can
+	 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
+	 */
+	for (retries = 0; retries < 1000; retries++) {
+		stat = hwif->tp_ops->read_status(hwif);
+
+		if (stat & ATA_BUSY)
+			udelay(10);
+		else
+			break;
+	}
+
+	if (stat & ATA_BUSY)
+		pr_err("%s: drive still BUSY!\n", drive->name);
+
+	return stat;
+}
+
+void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
+		   unsigned int write, unsigned int len)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct scatterlist *sg = hwif->sg_table;
+	struct scatterlist *cursg = cmd->cursg;
+	struct page *page;
+	unsigned int offset;
+	u8 *buf;
+
+	if (cursg == NULL)
+		cursg = cmd->cursg = sg;
+
+	while (len) {
+		unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
+
+		page = sg_page(cursg);
+		offset = cursg->offset + cmd->cursg_ofs;
+
+		/* get the current page and offset */
+		page = nth_page(page, (offset >> PAGE_SHIFT));
+		offset %= PAGE_SIZE;
+
+		nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
+
+		buf = kmap_atomic(page) + offset;
+
+		cmd->nleft -= nr_bytes;
+		cmd->cursg_ofs += nr_bytes;
+
+		if (cmd->cursg_ofs == cursg->length) {
+			cursg = cmd->cursg = sg_next(cmd->cursg);
+			cmd->cursg_ofs = 0;
+		}
+
+		/* do the actual data transfer */
+		if (write)
+			hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
+		else
+			hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
+
+		kunmap_atomic(buf);
+
+		len -= nr_bytes;
+	}
+}
+EXPORT_SYMBOL_GPL(ide_pio_bytes);
+
+static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
+			      unsigned int write)
+{
+	unsigned int nr_bytes;
+
+	u8 saved_io_32bit = drive->io_32bit;
+
+	if (cmd->tf_flags & IDE_TFLAG_FS)
+		scsi_req(cmd->rq)->result = 0;
+
+	if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
+		drive->io_32bit = 0;
+
+	touch_softlockup_watchdog();
+
+	if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
+		nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
+	else
+		nr_bytes = SECTOR_SIZE;
+
+	ide_pio_bytes(drive, cmd, write, nr_bytes);
+
+	drive->io_32bit = saved_io_32bit;
+}
+
+static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	if (cmd->tf_flags & IDE_TFLAG_FS) {
+		int nr_bytes = cmd->nbytes - cmd->nleft;
+
+		if (cmd->protocol == ATA_PROT_PIO &&
+		    ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
+			if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
+				nr_bytes -= drive->mult_count << 9;
+			else
+				nr_bytes -= SECTOR_SIZE;
+		}
+
+		if (nr_bytes > 0)
+			ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
+	}
+}
+
+void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
+{
+	struct request *rq = drive->hwif->rq;
+	u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
+	u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
+
+	ide_complete_cmd(drive, cmd, stat, err);
+	scsi_req(rq)->result = err;
+
+	if (err == 0 && set_xfer) {
+		ide_set_xfer_rate(drive, nsect);
+		ide_driveid_update(drive);
+	}
+
+	ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
+}
+
+/*
+ * Handler for command with PIO data phase.
+ */
+static ide_startstop_t task_pio_intr(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_cmd *cmd = &drive->hwif->cmd;
+	u8 stat = hwif->tp_ops->read_status(hwif);
+	u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+
+	if (write == 0) {
+		/* Error? */
+		if (stat & ATA_ERR)
+			goto out_err;
+
+		/* Didn't want any data? Odd. */
+		if ((stat & ATA_DRQ) == 0) {
+			/* Command all done? */
+			if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
+				goto out_end;
+
+			/* Assume it was a spurious irq */
+			goto out_wait;
+		}
+	} else {
+		if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
+			goto out_err;
+
+		/* Deal with unexpected ATA data phase. */
+		if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
+			goto out_err;
+	}
+
+	if (write && cmd->nleft == 0)
+		goto out_end;
+
+	/* Still data left to transfer. */
+	ide_pio_datablock(drive, cmd, write);
+
+	/* Are we done? Check status and finish transfer. */
+	if (write == 0 && cmd->nleft == 0) {
+		stat = wait_drive_not_busy(drive);
+		if (!OK_STAT(stat, 0, BAD_STAT))
+			goto out_err;
+
+		goto out_end;
+	}
+out_wait:
+	/* Still data left to transfer. */
+	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
+	return ide_started;
+out_end:
+	if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
+		ide_finish_cmd(drive, cmd, stat);
+	else
+		ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
+	return ide_stopped;
+out_err:
+	ide_error_cmd(drive, cmd);
+	return ide_error(drive, __func__, stat);
+}
+
+static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
+					 struct ide_cmd *cmd)
+{
+	ide_startstop_t startstop;
+
+	if (ide_wait_stat(&startstop, drive, ATA_DRQ,
+			  drive->bad_wstat, WAIT_DRQ)) {
+		pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
+			(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
+			(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
+		return startstop;
+	}
+
+	if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
+		local_irq_disable();
+
+	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
+
+	ide_pio_datablock(drive, cmd, 1);
+
+	return ide_started;
+}
+
+int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
+		     u16 nsect)
+{
+	struct request *rq;
+	int error;
+
+	rq = blk_get_request(drive->queue,
+		(cmd->tf_flags & IDE_TFLAG_WRITE) ?
+			REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
+	ide_req(rq)->type = ATA_PRIV_TASKFILE;
+
+	/*
+	 * (ks) We transfer currently only whole sectors.
+	 * This is suffient for now.  But, it would be great,
+	 * if we would find a solution to transfer any size.
+	 * To support special commands like READ LONG.
+	 */
+	if (nsect) {
+		error = blk_rq_map_kern(drive->queue, rq, buf,
+					nsect * SECTOR_SIZE, GFP_NOIO);
+		if (error)
+			goto put_req;
+	}
+
+	ide_req(rq)->special = cmd;
+	cmd->rq = rq;
+
+	blk_execute_rq(drive->queue, NULL, rq, 0);
+	error = scsi_req(rq)->result ? -EIO : 0;
+put_req:
+	blk_put_request(rq);
+	return error;
+}
+EXPORT_SYMBOL(ide_raw_taskfile);
+
+int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	cmd->protocol = ATA_PROT_NODATA;
+
+	return ide_raw_taskfile(drive, cmd, NULL, 0);
+}
+EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
+
+#ifdef CONFIG_IDE_TASK_IOCTL
+int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
+{
+	ide_task_request_t	*req_task;
+	struct ide_cmd		cmd;
+	u8 *outbuf		= NULL;
+	u8 *inbuf		= NULL;
+	u8 *data_buf		= NULL;
+	int err			= 0;
+	int tasksize		= sizeof(struct ide_task_request_s);
+	unsigned int taskin	= 0;
+	unsigned int taskout	= 0;
+	u16 nsect		= 0;
+	char __user *buf = (char __user *)arg;
+
+	req_task = memdup_user(buf, tasksize);
+	if (IS_ERR(req_task))
+		return PTR_ERR(req_task);
+
+	taskout = req_task->out_size;
+	taskin  = req_task->in_size;
+
+	if (taskin > 65536 || taskout > 65536) {
+		err = -EINVAL;
+		goto abort;
+	}
+
+	if (taskout) {
+		int outtotal = tasksize;
+		outbuf = kzalloc(taskout, GFP_KERNEL);
+		if (outbuf == NULL) {
+			err = -ENOMEM;
+			goto abort;
+		}
+		if (copy_from_user(outbuf, buf + outtotal, taskout)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+
+	if (taskin) {
+		int intotal = tasksize + taskout;
+		inbuf = kzalloc(taskin, GFP_KERNEL);
+		if (inbuf == NULL) {
+			err = -ENOMEM;
+			goto abort;
+		}
+		if (copy_from_user(inbuf, buf + intotal, taskin)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
+	memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
+
+	cmd.valid.out.tf = IDE_VALID_DEVICE;
+	cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
+	cmd.tf_flags = IDE_TFLAG_IO_16BIT;
+
+	if (drive->dev_flags & IDE_DFLAG_LBA48) {
+		cmd.tf_flags |= IDE_TFLAG_LBA48;
+		cmd.valid.in.hob = IDE_VALID_IN_HOB;
+	}
+
+	if (req_task->out_flags.all) {
+		cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
+
+		if (req_task->out_flags.b.data)
+			cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
+
+		if (req_task->out_flags.b.nsector_hob)
+			cmd.valid.out.hob |= IDE_VALID_NSECT;
+		if (req_task->out_flags.b.sector_hob)
+			cmd.valid.out.hob |= IDE_VALID_LBAL;
+		if (req_task->out_flags.b.lcyl_hob)
+			cmd.valid.out.hob |= IDE_VALID_LBAM;
+		if (req_task->out_flags.b.hcyl_hob)
+			cmd.valid.out.hob |= IDE_VALID_LBAH;
+
+		if (req_task->out_flags.b.error_feature)
+			cmd.valid.out.tf  |= IDE_VALID_FEATURE;
+		if (req_task->out_flags.b.nsector)
+			cmd.valid.out.tf  |= IDE_VALID_NSECT;
+		if (req_task->out_flags.b.sector)
+			cmd.valid.out.tf  |= IDE_VALID_LBAL;
+		if (req_task->out_flags.b.lcyl)
+			cmd.valid.out.tf  |= IDE_VALID_LBAM;
+		if (req_task->out_flags.b.hcyl)
+			cmd.valid.out.tf  |= IDE_VALID_LBAH;
+	} else {
+		cmd.valid.out.tf |= IDE_VALID_OUT_TF;
+		if (cmd.tf_flags & IDE_TFLAG_LBA48)
+			cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
+	}
+
+	if (req_task->in_flags.b.data)
+		cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
+
+	if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
+		/* fixup data phase if needed */
+		if (req_task->data_phase == TASKFILE_IN_DMAQ ||
+		    req_task->data_phase == TASKFILE_IN_DMA)
+			cmd.tf_flags |= IDE_TFLAG_WRITE;
+	}
+
+	cmd.protocol = ATA_PROT_DMA;
+
+	switch (req_task->data_phase) {
+	case TASKFILE_MULTI_OUT:
+		if (!drive->mult_count) {
+			/* (hs): give up if multcount is not set */
+			pr_err("%s: %s Multimode Write multcount is not set\n",
+				drive->name, __func__);
+			err = -EPERM;
+			goto abort;
+		}
+		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+		fallthrough;
+	case TASKFILE_OUT:
+		cmd.protocol = ATA_PROT_PIO;
+		fallthrough;
+	case TASKFILE_OUT_DMAQ:
+	case TASKFILE_OUT_DMA:
+		cmd.tf_flags |= IDE_TFLAG_WRITE;
+		nsect = taskout / SECTOR_SIZE;
+		data_buf = outbuf;
+		break;
+	case TASKFILE_MULTI_IN:
+		if (!drive->mult_count) {
+			/* (hs): give up if multcount is not set */
+			pr_err("%s: %s Multimode Read multcount is not set\n",
+				drive->name, __func__);
+			err = -EPERM;
+			goto abort;
+		}
+		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+		fallthrough;
+	case TASKFILE_IN:
+		cmd.protocol = ATA_PROT_PIO;
+		fallthrough;
+	case TASKFILE_IN_DMAQ:
+	case TASKFILE_IN_DMA:
+		nsect = taskin / SECTOR_SIZE;
+		data_buf = inbuf;
+		break;
+	case TASKFILE_NO_DATA:
+		cmd.protocol = ATA_PROT_NODATA;
+		break;
+	default:
+		err = -EFAULT;
+		goto abort;
+	}
+
+	if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
+		nsect = 0;
+	else if (!nsect) {
+		nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
+
+		if (!nsect) {
+			pr_err("%s: in/out command without data\n",
+					drive->name);
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+
+	err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
+
+	memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
+	memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
+
+	if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
+	    req_task->in_flags.all == 0) {
+		req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
+		if (drive->dev_flags & IDE_DFLAG_LBA48)
+			req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
+	}
+
+	if (copy_to_user(buf, req_task, tasksize)) {
+		err = -EFAULT;
+		goto abort;
+	}
+	if (taskout) {
+		int outtotal = tasksize;
+		if (copy_to_user(buf + outtotal, outbuf, taskout)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+	if (taskin) {
+		int intotal = tasksize + taskout;
+		if (copy_to_user(buf + intotal, inbuf, taskin)) {
+			err = -EFAULT;
+			goto abort;
+		}
+	}
+abort:
+	kfree(req_task);
+	kfree(outbuf);
+	kfree(inbuf);
+
+	return err;
+}
+#endif
diff --git a/drivers/ide/ide-timings.c b/drivers/ide/ide-timings.c
new file mode 100644
index 000000000..cfe78df74
--- /dev/null
+++ b/drivers/ide/ide-timings.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 1999-2001 Vojtech Pavlik
+ *  Copyright (c) 2007-2008 Bartlomiej Zolnierkiewicz
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/module.h>
+
+/*
+ * PIO 0-5, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
+ * These were taken from ATA/ATAPI-6 standard, rev 0a, except
+ * for PIO 5, which is a nonstandard extension and UDMA6, which
+ * is currently supported only by Maxtor drives.
+ */
+
+static struct ide_timing ide_timing[] = {
+
+	{ XFER_UDMA_6,     0,   0,   0,   0,   0,   0,   0,  15 },
+	{ XFER_UDMA_5,     0,   0,   0,   0,   0,   0,   0,  20 },
+	{ XFER_UDMA_4,     0,   0,   0,   0,   0,   0,   0,  30 },
+	{ XFER_UDMA_3,     0,   0,   0,   0,   0,   0,   0,  45 },
+
+	{ XFER_UDMA_2,     0,   0,   0,   0,   0,   0,   0,  60 },
+	{ XFER_UDMA_1,     0,   0,   0,   0,   0,   0,   0,  80 },
+	{ XFER_UDMA_0,     0,   0,   0,   0,   0,   0,   0, 120 },
+
+	{ XFER_MW_DMA_4,  25,   0,   0,   0,  55,  20,  80,   0 },
+	{ XFER_MW_DMA_3,  25,   0,   0,   0,  65,  25, 100,   0 },
+	{ XFER_MW_DMA_2,  25,   0,   0,   0,  70,  25, 120,   0 },
+	{ XFER_MW_DMA_1,  45,   0,   0,   0,  80,  50, 150,   0 },
+	{ XFER_MW_DMA_0,  60,   0,   0,   0, 215, 215, 480,   0 },
+
+	{ XFER_SW_DMA_2,  60,   0,   0,   0, 120, 120, 240,   0 },
+	{ XFER_SW_DMA_1,  90,   0,   0,   0, 240, 240, 480,   0 },
+	{ XFER_SW_DMA_0, 120,   0,   0,   0, 480, 480, 960,   0 },
+
+	{ XFER_PIO_6,     10,  55,  20,  80,  55,  20,  80,   0 },
+	{ XFER_PIO_5,     15,  65,  25, 100,  65,  25, 100,   0 },
+	{ XFER_PIO_4,     25,  70,  25, 120,  70,  25, 120,   0 },
+	{ XFER_PIO_3,     30,  80,  70, 180,  80,  70, 180,   0 },
+
+	{ XFER_PIO_2,     30, 290,  40, 330, 100,  90, 240,   0 },
+	{ XFER_PIO_1,     50, 290,  93, 383, 125, 100, 383,   0 },
+	{ XFER_PIO_0,     70, 290, 240, 600, 165, 150, 600,   0 },
+
+	{ XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960,   0 },
+
+	{ 0xff }
+};
+
+struct ide_timing *ide_timing_find_mode(u8 speed)
+{
+	struct ide_timing *t;
+
+	for (t = ide_timing; t->mode != speed; t++)
+		if (t->mode == 0xff)
+			return NULL;
+	return t;
+}
+EXPORT_SYMBOL_GPL(ide_timing_find_mode);
+
+u16 ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
+{
+	u16 *id = drive->id;
+	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+	u16 cycle = 0;
+
+	if (id[ATA_ID_FIELD_VALID] & 2) {
+		if (ata_id_has_iordy(drive->id))
+			cycle = id[ATA_ID_EIDE_PIO_IORDY];
+		else
+			cycle = id[ATA_ID_EIDE_PIO];
+
+		/* conservative "downgrade" for all pre-ATA2 drives */
+		if (pio < 3 && cycle < t->cycle)
+			cycle = 0; /* use standard timing */
+
+		/* Use the standard timing for the CF specific modes too */
+		if (pio > 4 && ata_id_is_cfa(id))
+			cycle = 0;
+	}
+
+	return cycle ? cycle : t->cycle;
+}
+EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
+
+#define ENOUGH(v, unit)		(((v) - 1) / (unit) + 1)
+#define EZ(v, unit)		((v) ? ENOUGH((v) * 1000, unit) : 0)
+
+static void ide_timing_quantize(struct ide_timing *t, struct ide_timing *q,
+				int T, int UT)
+{
+	q->setup   = EZ(t->setup,   T);
+	q->act8b   = EZ(t->act8b,   T);
+	q->rec8b   = EZ(t->rec8b,   T);
+	q->cyc8b   = EZ(t->cyc8b,   T);
+	q->active  = EZ(t->active,  T);
+	q->recover = EZ(t->recover, T);
+	q->cycle   = EZ(t->cycle,   T);
+	q->udma    = EZ(t->udma,    UT);
+}
+
+void ide_timing_merge(struct ide_timing *a, struct ide_timing *b,
+		      struct ide_timing *m, unsigned int what)
+{
+	if (what & IDE_TIMING_SETUP)
+		m->setup   = max(a->setup,   b->setup);
+	if (what & IDE_TIMING_ACT8B)
+		m->act8b   = max(a->act8b,   b->act8b);
+	if (what & IDE_TIMING_REC8B)
+		m->rec8b   = max(a->rec8b,   b->rec8b);
+	if (what & IDE_TIMING_CYC8B)
+		m->cyc8b   = max(a->cyc8b,   b->cyc8b);
+	if (what & IDE_TIMING_ACTIVE)
+		m->active  = max(a->active,  b->active);
+	if (what & IDE_TIMING_RECOVER)
+		m->recover = max(a->recover, b->recover);
+	if (what & IDE_TIMING_CYCLE)
+		m->cycle   = max(a->cycle,   b->cycle);
+	if (what & IDE_TIMING_UDMA)
+		m->udma    = max(a->udma,    b->udma);
+}
+EXPORT_SYMBOL_GPL(ide_timing_merge);
+
+int ide_timing_compute(ide_drive_t *drive, u8 speed,
+		       struct ide_timing *t, int T, int UT)
+{
+	u16 *id = drive->id;
+	struct ide_timing *s, p;
+
+	/*
+	 * Find the mode.
+	 */
+	s = ide_timing_find_mode(speed);
+	if (s == NULL)
+		return -EINVAL;
+
+	/*
+	 * Copy the timing from the table.
+	 */
+	*t = *s;
+
+	/*
+	 * If the drive is an EIDE drive, it can tell us it needs extended
+	 * PIO/MWDMA cycle timing.
+	 */
+	if (id[ATA_ID_FIELD_VALID] & 2) {	/* EIDE drive */
+		memset(&p, 0, sizeof(p));
+
+		if (speed >= XFER_PIO_0 && speed < XFER_SW_DMA_0) {
+			if (speed <= XFER_PIO_2)
+				p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
+			else if ((speed <= XFER_PIO_4) ||
+				 (speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
+				p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
+		} else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
+			p.cycle = id[ATA_ID_EIDE_DMA_MIN];
+
+		ide_timing_merge(&p, t, t, IDE_TIMING_CYCLE | IDE_TIMING_CYC8B);
+	}
+
+	/*
+	 * Convert the timing to bus clock counts.
+	 */
+	ide_timing_quantize(t, t, T, UT);
+
+	/*
+	 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
+	 * S.M.A.R.T and some other commands. We have to ensure that the
+	 * DMA cycle timing is slower/equal than the current PIO timing.
+	 */
+	if (speed >= XFER_SW_DMA_0) {
+		ide_timing_compute(drive, drive->pio_mode, &p, T, UT);
+		ide_timing_merge(&p, t, t, IDE_TIMING_ALL);
+	}
+
+	/*
+	 * Lengthen active & recovery time so that cycle time is correct.
+	 */
+	if (t->act8b + t->rec8b < t->cyc8b) {
+		t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
+		t->rec8b = t->cyc8b - t->act8b;
+	}
+
+	if (t->active + t->recover < t->cycle) {
+		t->active += (t->cycle - (t->active + t->recover)) / 2;
+		t->recover = t->cycle - t->active;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_timing_compute);
diff --git a/drivers/ide/ide-xfer-mode.c b/drivers/ide/ide-xfer-mode.c
new file mode 100644
index 000000000..0b9709b48
--- /dev/null
+++ b/drivers/ide/ide-xfer-mode.c
@@ -0,0 +1,267 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/interrupt.h>
+#include <linux/ide.h>
+#include <linux/bitops.h>
+
+static const char *udma_str[] =
+	 { "UDMA/16", "UDMA/25",  "UDMA/33",  "UDMA/44",
+	   "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" };
+static const char *mwdma_str[] =
+	{ "MWDMA0", "MWDMA1", "MWDMA2", "MWDMA3", "MWDMA4" };
+static const char *swdma_str[] =
+	{ "SWDMA0", "SWDMA1", "SWDMA2" };
+static const char *pio_str[] =
+	{ "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5", "PIO6" };
+
+/**
+ *	ide_xfer_verbose	-	return IDE mode names
+ *	@mode: transfer mode
+ *
+ *	Returns a constant string giving the name of the mode
+ *	requested.
+ */
+
+const char *ide_xfer_verbose(u8 mode)
+{
+	const char *s;
+	u8 i = mode & 0xf;
+
+	if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7)
+		s = udma_str[i];
+	else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_4)
+		s = mwdma_str[i];
+	else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2)
+		s = swdma_str[i];
+	else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_6)
+		s = pio_str[i & 0x7];
+	else if (mode == XFER_PIO_SLOW)
+		s = "PIO SLOW";
+	else
+		s = "XFER ERROR";
+
+	return s;
+}
+EXPORT_SYMBOL(ide_xfer_verbose);
+
+/**
+ *	ide_get_best_pio_mode	-	get PIO mode from drive
+ *	@drive: drive to consider
+ *	@mode_wanted: preferred mode
+ *	@max_mode: highest allowed mode
+ *
+ *	This routine returns the recommended PIO settings for a given drive,
+ *	based on the drive->id information and the ide_pio_blacklist[].
+ *
+ *	Drive PIO mode is auto-selected if 255 is passed as mode_wanted.
+ *	This is used by most chipset support modules when "auto-tuning".
+ */
+
+static u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
+{
+	u16 *id = drive->id;
+	int pio_mode = -1, overridden = 0;
+
+	if (mode_wanted != 255)
+		return min_t(u8, mode_wanted, max_mode);
+
+	if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0)
+		pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]);
+
+	if (pio_mode != -1) {
+		printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
+	} else {
+		pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8;
+		if (pio_mode > 2) {	/* 2 is maximum allowed tPIO value */
+			pio_mode = 2;
+			overridden = 1;
+		}
+
+		if (id[ATA_ID_FIELD_VALID] & 2) {	      /* ATA2? */
+			if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 7))
+				pio_mode = 4 + min_t(int, 2,
+						     id[ATA_ID_CFA_MODES] & 7);
+			else if (ata_id_has_iordy(id)) {
+				if (id[ATA_ID_PIO_MODES] & 7) {
+					overridden = 0;
+					if (id[ATA_ID_PIO_MODES] & 4)
+						pio_mode = 5;
+					else if (id[ATA_ID_PIO_MODES] & 2)
+						pio_mode = 4;
+					else
+						pio_mode = 3;
+				}
+			}
+		}
+
+		if (overridden)
+			printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
+					 drive->name);
+	}
+
+	if (pio_mode > max_mode)
+		pio_mode = max_mode;
+
+	return pio_mode;
+}
+
+int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)
+{
+	/*
+	 * IORDY may lead to controller lock up on certain controllers
+	 * if the port is not occupied.
+	 */
+	if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING))
+		return 0;
+	return ata_id_pio_need_iordy(drive->id, pio);
+}
+EXPORT_SYMBOL_GPL(ide_pio_need_iordy);
+
+int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+
+	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
+		return 0;
+
+	if (port_ops == NULL || port_ops->set_pio_mode == NULL)
+		return -1;
+
+	/*
+	 * TODO: temporary hack for some legacy host drivers that didn't
+	 * set transfer mode on the device in ->set_pio_mode method...
+	 */
+	if (port_ops->set_dma_mode == NULL) {
+		drive->pio_mode = mode;
+		port_ops->set_pio_mode(hwif, drive);
+		return 0;
+	}
+
+	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
+		if (ide_config_drive_speed(drive, mode))
+			return -1;
+		drive->pio_mode = mode;
+		port_ops->set_pio_mode(hwif, drive);
+		return 0;
+	} else {
+		drive->pio_mode = mode;
+		port_ops->set_pio_mode(hwif, drive);
+		return ide_config_drive_speed(drive, mode);
+	}
+}
+
+int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+
+	if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE)
+		return 0;
+
+	if (port_ops == NULL || port_ops->set_dma_mode == NULL)
+		return -1;
+
+	if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
+		if (ide_config_drive_speed(drive, mode))
+			return -1;
+		drive->dma_mode = mode;
+		port_ops->set_dma_mode(hwif, drive);
+		return 0;
+	} else {
+		drive->dma_mode = mode;
+		port_ops->set_dma_mode(hwif, drive);
+		return ide_config_drive_speed(drive, mode);
+	}
+}
+EXPORT_SYMBOL_GPL(ide_set_dma_mode);
+
+/* req_pio == "255" for auto-tune */
+void ide_set_pio(ide_drive_t *drive, u8 req_pio)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+	u8 host_pio, pio;
+
+	if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
+	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
+		return;
+
+	BUG_ON(hwif->pio_mask == 0x00);
+
+	host_pio = fls(hwif->pio_mask) - 1;
+
+	pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
+
+	/*
+	 * TODO:
+	 * - report device max PIO mode
+	 * - check req_pio != 255 against device max PIO mode
+	 */
+	printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
+			  drive->name, host_pio, req_pio,
+			  req_pio == 255 ? "(auto-tune)" : "", pio);
+
+	(void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
+}
+EXPORT_SYMBOL_GPL(ide_set_pio);
+
+/**
+ *	ide_rate_filter		-	filter transfer mode
+ *	@drive: IDE device
+ *	@speed: desired speed
+ *
+ *	Given the available transfer modes this function returns
+ *	the best available speed at or below the speed requested.
+ *
+ *	TODO: check device PIO capabilities
+ */
+
+static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 mode = ide_find_dma_mode(drive, speed);
+
+	if (mode == 0) {
+		if (hwif->pio_mask)
+			mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
+		else
+			mode = XFER_PIO_4;
+	}
+
+/*	printk("%s: mode 0x%02x, speed 0x%02x\n", __func__, mode, speed); */
+
+	return min(speed, mode);
+}
+
+/**
+ *	ide_set_xfer_rate	-	set transfer rate
+ *	@drive: drive to set
+ *	@rate: speed to attempt to set
+ *
+ *	General helper for setting the speed of an IDE device. This
+ *	function knows about user enforced limits from the configuration
+ *	which ->set_pio_mode/->set_dma_mode does not.
+ */
+
+int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	const struct ide_port_ops *port_ops = hwif->port_ops;
+
+	if (port_ops == NULL || port_ops->set_dma_mode == NULL ||
+	    (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
+		return -1;
+
+	rate = ide_rate_filter(drive, rate);
+
+	BUG_ON(rate < XFER_PIO_0);
+
+	if (rate >= XFER_PIO_0 && rate <= XFER_PIO_6)
+		return ide_set_pio_mode(drive, rate);
+
+	return ide_set_dma_mode(drive, rate);
+}
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
new file mode 100644
index 000000000..9a9c64fd1
--- /dev/null
+++ b/drivers/ide/ide.c
@@ -0,0 +1,415 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1994-1998	    Linus Torvalds & authors (see below)
+ *  Copyright (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
+ */
+
+/*
+ *  Mostly written by Mark Lord  <mlord@pobox.com>
+ *                and Gadi Oxman <gadio@netvision.net.il>
+ *                and Andre Hedrick <andre@linux-ide.org>
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ * This is the multiple IDE interface driver, as evolved from hd.c.
+ * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
+ *   (usually 14 & 15).
+ * There can be up to two drives per interface, as per the ATA-2 spec.
+ *
+ * ...
+ *
+ *  From hd.c:
+ *  |
+ *  | It traverses the request-list, using interrupts to jump between functions.
+ *  | As nearly all functions can be called within interrupts, we may not sleep.
+ *  | Special care is recommended.  Have Fun!
+ *  |
+ *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
+ *  |
+ *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
+ *  | in the early extended-partition checks and added DM partitions.
+ *  |
+ *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
+ *  |
+ *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
+ *  | and general streamlining by Mark Lord (mlord@pobox.com).
+ *
+ *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
+ *
+ *	Mark Lord	(mlord@pobox.com)		(IDE Perf.Pkg)
+ *	Delman Lee	(delman@ieee.org)		("Mr. atdisk2")
+ *	Scott Snyder	(snyder@fnald0.fnal.gov)	(ATAPI IDE cd-rom)
+ *
+ *  This was a rewrite of just about everything from hd.c, though some original
+ *  code is still sprinkled about.  Think of it as a major evolution, with
+ *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/genhd.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/hdreg.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+
+struct class *ide_port_class;
+
+/**
+ * ide_device_get	-	get an additional reference to a ide_drive_t
+ * @drive:	device to get a reference to
+ *
+ * Gets a reference to the ide_drive_t and increments the use count of the
+ * underlying LLDD module.
+ */
+int ide_device_get(ide_drive_t *drive)
+{
+	struct device *host_dev;
+	struct module *module;
+
+	if (!get_device(&drive->gendev))
+		return -ENXIO;
+
+	host_dev = drive->hwif->host->dev[0];
+	module = host_dev ? host_dev->driver->owner : NULL;
+
+	if (module && !try_module_get(module)) {
+		put_device(&drive->gendev);
+		return -ENXIO;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_device_get);
+
+/**
+ * ide_device_put	-	release a reference to a ide_drive_t
+ * @drive:	device to release a reference on
+ *
+ * Release a reference to the ide_drive_t and decrements the use count of
+ * the underlying LLDD module.
+ */
+void ide_device_put(ide_drive_t *drive)
+{
+#ifdef CONFIG_MODULE_UNLOAD
+	struct device *host_dev = drive->hwif->host->dev[0];
+	struct module *module = host_dev ? host_dev->driver->owner : NULL;
+
+	module_put(module);
+#endif
+	put_device(&drive->gendev);
+}
+EXPORT_SYMBOL_GPL(ide_device_put);
+
+static int ide_bus_match(struct device *dev, struct device_driver *drv)
+{
+	return 1;
+}
+
+static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+
+	add_uevent_var(env, "MEDIA=%s", ide_media_string(drive));
+	add_uevent_var(env, "DRIVENAME=%s", drive->name);
+	add_uevent_var(env, "MODALIAS=ide:m-%s", ide_media_string(drive));
+	return 0;
+}
+
+static int generic_ide_probe(struct device *dev)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	struct ide_driver *drv = to_ide_driver(dev->driver);
+
+	return drv->probe ? drv->probe(drive) : -ENODEV;
+}
+
+static int generic_ide_remove(struct device *dev)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	struct ide_driver *drv = to_ide_driver(dev->driver);
+
+	if (drv->remove)
+		drv->remove(drive);
+
+	return 0;
+}
+
+static void generic_ide_shutdown(struct device *dev)
+{
+	ide_drive_t *drive = to_ide_device(dev);
+	struct ide_driver *drv = to_ide_driver(dev->driver);
+
+	if (dev->driver && drv->shutdown)
+		drv->shutdown(drive);
+}
+
+struct bus_type ide_bus_type = {
+	.name		= "ide",
+	.match		= ide_bus_match,
+	.uevent		= ide_uevent,
+	.probe		= generic_ide_probe,
+	.remove		= generic_ide_remove,
+	.shutdown	= generic_ide_shutdown,
+	.dev_groups	= ide_dev_groups,
+	.suspend	= generic_ide_suspend,
+	.resume		= generic_ide_resume,
+};
+
+EXPORT_SYMBOL_GPL(ide_bus_type);
+
+int ide_vlb_clk;
+EXPORT_SYMBOL_GPL(ide_vlb_clk);
+
+module_param_named(vlb_clock, ide_vlb_clk, int, 0);
+MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
+
+int ide_pci_clk;
+EXPORT_SYMBOL_GPL(ide_pci_clk);
+
+module_param_named(pci_clock, ide_pci_clk, int, 0);
+MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
+
+static int ide_set_dev_param_mask(const char *s, const struct kernel_param *kp)
+{
+	unsigned int a, b, i, j = 1;
+	unsigned int *dev_param_mask = (unsigned int *)kp->arg;
+
+	/* controller . device (0 or 1) [ : 1 (set) | 0 (clear) ] */
+	if (sscanf(s, "%u.%u:%u", &a, &b, &j) != 3 &&
+	    sscanf(s, "%u.%u", &a, &b) != 2)
+		return -EINVAL;
+
+	i = a * MAX_DRIVES + b;
+
+	if (i >= MAX_HWIFS * MAX_DRIVES || j > 1)
+		return -EINVAL;
+
+	if (j)
+		*dev_param_mask |= (1 << i);
+	else
+		*dev_param_mask &= ~(1 << i);
+
+	return 0;
+}
+
+static const struct kernel_param_ops param_ops_ide_dev_mask = {
+	.set = ide_set_dev_param_mask
+};
+
+#define param_check_ide_dev_mask(name, p) param_check_uint(name, p)
+
+static unsigned int ide_nodma;
+
+module_param_named(nodma, ide_nodma, ide_dev_mask, 0);
+MODULE_PARM_DESC(nodma, "disallow DMA for a device");
+
+static unsigned int ide_noflush;
+
+module_param_named(noflush, ide_noflush, ide_dev_mask, 0);
+MODULE_PARM_DESC(noflush, "disable flush requests for a device");
+
+static unsigned int ide_nohpa;
+
+module_param_named(nohpa, ide_nohpa, ide_dev_mask, 0);
+MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
+
+static unsigned int ide_noprobe;
+
+module_param_named(noprobe, ide_noprobe, ide_dev_mask, 0);
+MODULE_PARM_DESC(noprobe, "skip probing for a device");
+
+static unsigned int ide_nowerr;
+
+module_param_named(nowerr, ide_nowerr, ide_dev_mask, 0);
+MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
+
+static unsigned int ide_cdroms;
+
+module_param_named(cdrom, ide_cdroms, ide_dev_mask, 0);
+MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
+
+struct chs_geom {
+	unsigned int	cyl;
+	u8		head;
+	u8		sect;
+};
+
+static unsigned int ide_disks;
+static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
+
+static int ide_set_disk_chs(const char *str, const struct kernel_param *kp)
+{
+	unsigned int a, b, c = 0, h = 0, s = 0, i, j = 1;
+
+	/* controller . device (0 or 1) : Cylinders , Heads , Sectors */
+	/* controller . device (0 or 1) : 1 (use CHS) | 0 (ignore CHS) */
+	if (sscanf(str, "%u.%u:%u,%u,%u", &a, &b, &c, &h, &s) != 5 &&
+	    sscanf(str, "%u.%u:%u", &a, &b, &j) != 3)
+		return -EINVAL;
+
+	i = a * MAX_DRIVES + b;
+
+	if (i >= MAX_HWIFS * MAX_DRIVES || j > 1)
+		return -EINVAL;
+
+	if (c > INT_MAX || h > 255 || s > 255)
+		return -EINVAL;
+
+	if (j)
+		ide_disks |= (1 << i);
+	else
+		ide_disks &= ~(1 << i);
+
+	ide_disks_chs[i].cyl  = c;
+	ide_disks_chs[i].head = h;
+	ide_disks_chs[i].sect = s;
+
+	return 0;
+}
+
+module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
+MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
+
+static void ide_dev_apply_params(ide_drive_t *drive, u8 unit)
+{
+	int i = drive->hwif->index * MAX_DRIVES + unit;
+
+	if (ide_nodma & (1 << i)) {
+		printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
+		drive->dev_flags |= IDE_DFLAG_NODMA;
+	}
+	if (ide_noflush & (1 << i)) {
+		printk(KERN_INFO "ide: disabling flush requests for %s\n",
+				 drive->name);
+		drive->dev_flags |= IDE_DFLAG_NOFLUSH;
+	}
+	if (ide_nohpa & (1 << i)) {
+		printk(KERN_INFO "ide: disabling Host Protected Area for %s\n",
+				 drive->name);
+		drive->dev_flags |= IDE_DFLAG_NOHPA;
+	}
+	if (ide_noprobe & (1 << i)) {
+		printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
+		drive->dev_flags |= IDE_DFLAG_NOPROBE;
+	}
+	if (ide_nowerr & (1 << i)) {
+		printk(KERN_INFO "ide: ignoring the ATA_DF bit for %s\n",
+				 drive->name);
+		drive->bad_wstat = BAD_R_STAT;
+	}
+	if (ide_cdroms & (1 << i)) {
+		printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
+		drive->dev_flags |= IDE_DFLAG_PRESENT;
+		drive->media = ide_cdrom;
+		/* an ATAPI device ignores DRDY */
+		drive->ready_stat = 0;
+	}
+	if (ide_disks & (1 << i)) {
+		drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
+		drive->head = drive->bios_head = ide_disks_chs[i].head;
+		drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
+
+		printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
+				 drive->name,
+				 drive->cyl, drive->head, drive->sect);
+
+		drive->dev_flags |= IDE_DFLAG_FORCED_GEOM | IDE_DFLAG_PRESENT;
+		drive->media = ide_disk;
+		drive->ready_stat = ATA_DRDY;
+	}
+}
+
+static unsigned int ide_ignore_cable;
+
+static int ide_set_ignore_cable(const char *s, const struct kernel_param *kp)
+{
+	int i, j = 1;
+
+	/* controller (ignore) */
+	/* controller : 1 (ignore) | 0 (use) */
+	if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
+		return -EINVAL;
+
+	if (i >= MAX_HWIFS || j < 0 || j > 1)
+		return -EINVAL;
+
+	if (j)
+		ide_ignore_cable |= (1 << i);
+	else
+		ide_ignore_cable &= ~(1 << i);
+
+	return 0;
+}
+
+module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
+MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
+
+void ide_port_apply_params(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i;
+
+	if (ide_ignore_cable & (1 << hwif->index)) {
+		printk(KERN_INFO "ide: ignoring cable detection for %s\n",
+				 hwif->name);
+		hwif->cbl = ATA_CBL_PATA40_SHORT;
+	}
+
+	ide_port_for_each_dev(i, drive, hwif)
+		ide_dev_apply_params(drive, i);
+}
+
+/*
+ * This is gets invoked once during initialization, to set *everything* up
+ */
+static int __init ide_init(void)
+{
+	int ret;
+
+	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
+
+	ret = bus_register(&ide_bus_type);
+	if (ret < 0) {
+		printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
+		return ret;
+	}
+
+	ide_port_class = class_create(THIS_MODULE, "ide_port");
+	if (IS_ERR(ide_port_class)) {
+		ret = PTR_ERR(ide_port_class);
+		goto out_port_class;
+	}
+
+	ide_acpi_init();
+
+	proc_ide_create();
+
+	return 0;
+
+out_port_class:
+	bus_unregister(&ide_bus_type);
+
+	return ret;
+}
+
+static void __exit ide_exit(void)
+{
+	proc_ide_destroy();
+
+	class_destroy(ide_port_class);
+
+	bus_unregister(&ide_bus_type);
+}
+
+module_init(ide_init);
+module_exit(ide_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ide_platform.c b/drivers/ide/ide_platform.c
new file mode 100644
index 000000000..91639fd6c
--- /dev/null
+++ b/drivers/ide/ide_platform.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Platform IDE driver
+ *
+ * Copyright (C) 2007 MontaVista Software
+ *
+ * Maintainer: Kumar Gala <galak@kernel.crashing.org>
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/ide.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/ata_platform.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base,
+				 void __iomem *ctrl,
+				 struct pata_platform_info *pdata, int irq)
+{
+	unsigned long port = (unsigned long)base;
+	int i;
+
+	hw->io_ports.data_addr = port;
+
+	port += (1 << pdata->ioport_shift);
+	for (i = 1; i <= 7;
+	     i++, port += (1 << pdata->ioport_shift))
+		hw->io_ports_array[i] = port;
+
+	hw->io_ports.ctl_addr = (unsigned long)ctrl;
+
+	hw->irq = irq;
+}
+
+static const struct ide_port_info platform_ide_port_info = {
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.chipset		= ide_generic,
+};
+
+static int plat_ide_probe(struct platform_device *pdev)
+{
+	struct resource *res_base, *res_alt, *res_irq;
+	void __iomem *base, *alt_base;
+	struct pata_platform_info *pdata;
+	struct ide_host *host;
+	int ret = 0, mmio = 0;
+	struct ide_hw hw, *hws[] = { &hw };
+	struct ide_port_info d = platform_ide_port_info;
+
+	pdata = dev_get_platdata(&pdev->dev);
+
+	/* get a pointer to the register memory */
+	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
+
+	if (!res_base || !res_alt) {
+		res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+		if (!res_base || !res_alt) {
+			ret = -ENOMEM;
+			goto out;
+		}
+		mmio = 1;
+	}
+
+	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!res_irq) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (mmio) {
+		base = devm_ioremap(&pdev->dev,
+			res_base->start, resource_size(res_base));
+		alt_base = devm_ioremap(&pdev->dev,
+			res_alt->start, resource_size(res_alt));
+	} else {
+		base = devm_ioport_map(&pdev->dev,
+			res_base->start, resource_size(res_base));
+		alt_base = devm_ioport_map(&pdev->dev,
+			res_alt->start, resource_size(res_alt));
+	}
+
+	memset(&hw, 0, sizeof(hw));
+	plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
+	hw.dev = &pdev->dev;
+
+	d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
+	if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
+		d.irq_flags |= IRQF_SHARED;
+
+	if (mmio)
+		d.host_flags |= IDE_HFLAG_MMIO;
+
+	ret = ide_host_add(&d, hws, 1, &host);
+	if (ret)
+		goto out;
+
+	platform_set_drvdata(pdev, host);
+
+	return 0;
+
+out:
+	return ret;
+}
+
+static int plat_ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = dev_get_drvdata(&pdev->dev);
+
+	ide_host_remove(host);
+
+	return 0;
+}
+
+static struct platform_driver platform_ide_driver = {
+	.driver = {
+		.name = "pata_platform",
+	},
+	.probe = plat_ide_probe,
+	.remove = plat_ide_remove,
+};
+
+module_platform_driver(platform_ide_driver);
+
+MODULE_DESCRIPTION("Platform IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pata_platform");
diff --git a/drivers/ide/it8172.c b/drivers/ide/it8172.c
new file mode 100644
index 000000000..b6f674ab4
--- /dev/null
+++ b/drivers/ide/it8172.c
@@ -0,0 +1,165 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *      IT8172 IDE controller support
+ *
+ * Copyright (C) 2000 MontaVista Software Inc.
+ * Copyright (C) 2008 Shane McDonald
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "IT8172"
+
+static void it8172_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u16 drive_enables;
+	u32 drive_timing;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	/*
+	 * The highest value of DIOR/DIOW pulse width and recovery time
+	 * that can be set in the IT8172 is 8 PCI clock cycles.  As a result,
+	 * it cannot be configured for PIO mode 0.  This table sets these
+	 * parameters to the maximum supported by the IT8172.
+	 */
+	static const u8 timings[] = { 0x3f, 0x3c, 0x1b, 0x12, 0x0a };
+
+	pci_read_config_word(dev, 0x40, &drive_enables);
+	pci_read_config_dword(dev, 0x44, &drive_timing);
+
+	/*
+	 * Enable port 0x44. The IT8172 spec is confused; it calls
+	 * this register the "Slave IDE Timing Register", but in fact,
+	 * it controls timing for both master and slave drives.
+	 */
+	drive_enables |= 0x4000;
+
+	drive_enables &= drive->dn ? 0xc006 : 0xc060;
+	if (drive->media == ide_disk)
+		/* enable prefetch */
+		drive_enables |= 0x0004 << (drive->dn * 4);
+	if (ide_pio_need_iordy(drive, pio))
+		/* enable IORDY sample-point */
+		drive_enables |= 0x0002 << (drive->dn * 4);
+
+	drive_timing &= drive->dn ? 0x00003f00 : 0x000fc000;
+	drive_timing |= timings[pio] << (drive->dn * 6 + 8);
+
+	pci_write_config_word(dev, 0x40, drive_enables);
+	pci_write_config_dword(dev, 0x44, drive_timing);
+}
+
+static void it8172_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int a_speed		= 3 << (drive->dn * 4);
+	int u_flag		= 1 << drive->dn;
+	int u_speed		= 0;
+	u8 reg48, reg4a;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_byte(dev, 0x48, &reg48);
+	pci_read_config_byte(dev, 0x4a, &reg4a);
+
+	if (speed >= XFER_UDMA_0) {
+		u8 udma = speed - XFER_UDMA_0;
+		u_speed = udma << (drive->dn * 4);
+
+		pci_write_config_byte(dev, 0x48, reg48 | u_flag);
+		reg4a &= ~a_speed;
+		pci_write_config_byte(dev, 0x4a, reg4a | u_speed);
+	} else {
+		const u8 mwdma_to_pio[] = { 0, 3, 4 };
+
+		pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
+		pci_write_config_byte(dev, 0x4a, reg4a & ~a_speed);
+
+		drive->pio_mode =
+			mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
+
+		it8172_set_pio_mode(hwif, drive);
+	}
+}
+
+
+static const struct ide_port_ops it8172_port_ops = {
+	.set_pio_mode	= it8172_set_pio_mode,
+	.set_dma_mode	= it8172_set_dma_mode,
+};
+
+static const struct ide_port_info it8172_port_info = {
+	.name		= DRV_NAME,
+	.port_ops	= &it8172_port_ops,
+	.enablebits	= { {0x41, 0x80, 0x80}, {0x00, 0x00, 0x00} },
+	.host_flags	= IDE_HFLAG_SINGLE,
+	.pio_mask	= ATA_PIO4 & ~ATA_PIO0,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA2,
+};
+
+static int it8172_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
+		return -ENODEV; /* IT8172 is more than an IDE controller */
+	return ide_pci_init_one(dev, &it8172_port_info, NULL);
+}
+
+static struct pci_device_id it8172_pci_tbl[] = {
+	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8172), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, it8172_pci_tbl);
+
+static struct pci_driver it8172_pci_driver = {
+	.name		= "IT8172_IDE",
+	.id_table	= it8172_pci_tbl,
+	.probe		= it8172_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init it8172_ide_init(void)
+{
+	return ide_pci_register_driver(&it8172_pci_driver);
+}
+
+static void __exit it8172_ide_exit(void)
+{
+	pci_unregister_driver(&it8172_pci_driver);
+}
+
+module_init(it8172_ide_init);
+module_exit(it8172_ide_exit);
+
+MODULE_AUTHOR("Steve Longerbeam");
+MODULE_DESCRIPTION("PCI driver module for ITE 8172 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/it8213.c b/drivers/ide/it8213.c
new file mode 100644
index 000000000..d0bf4430c
--- /dev/null
+++ b/drivers/ide/it8213.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ITE 8213 IDE driver
+ *
+ * Copyright (C) 2006 Jack Lee
+ * Copyright (C) 2006 Alan Cox
+ * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "it8213"
+
+/**
+ *	it8213_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Set the interface PIO mode.
+ */
+
+static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int is_slave		= drive->dn & 1;
+	int master_port		= 0x40;
+	int slave_port		= 0x44;
+	unsigned long flags;
+	u16 master_data;
+	u8 slave_data;
+	static DEFINE_SPINLOCK(tune_lock);
+	int control = 0;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	static const u8 timings[][2] = {
+					{ 0, 0 },
+					{ 0, 0 },
+					{ 1, 0 },
+					{ 2, 1 },
+					{ 2, 3 }, };
+
+	spin_lock_irqsave(&tune_lock, flags);
+	pci_read_config_word(dev, master_port, &master_data);
+
+	if (pio > 1)
+		control |= 1;	/* Programmable timing on */
+	if (drive->media != ide_disk)
+		control |= 4;	/* ATAPI */
+	if (ide_pio_need_iordy(drive, pio))
+		control |= 2;	/* IORDY */
+	if (is_slave) {
+		master_data |=  0x4000;
+		master_data &= ~0x0070;
+		if (pio > 1)
+			master_data = master_data | (control << 4);
+		pci_read_config_byte(dev, slave_port, &slave_data);
+		slave_data = slave_data & 0xf0;
+		slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1];
+	} else {
+		master_data &= ~0x3307;
+		if (pio > 1)
+			master_data = master_data | control;
+		master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
+	}
+	pci_write_config_word(dev, master_port, master_data);
+	if (is_slave)
+		pci_write_config_byte(dev, slave_port, slave_data);
+	spin_unlock_irqrestore(&tune_lock, flags);
+}
+
+/**
+ *	it8213_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Tune the ITE chipset for the DMA mode.
+ */
+
+static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 maslave		= 0x40;
+	int a_speed		= 3 << (drive->dn * 4);
+	int u_flag		= 1 << drive->dn;
+	int v_flag		= 0x01 << drive->dn;
+	int w_flag		= 0x10 << drive->dn;
+	int u_speed		= 0;
+	u16			reg4042, reg4a;
+	u8			reg48, reg54, reg55;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_word(dev, maslave, &reg4042);
+	pci_read_config_byte(dev, 0x48, &reg48);
+	pci_read_config_word(dev, 0x4a, &reg4a);
+	pci_read_config_byte(dev, 0x54, &reg54);
+	pci_read_config_byte(dev, 0x55, &reg55);
+
+	if (speed >= XFER_UDMA_0) {
+		u8 udma = speed - XFER_UDMA_0;
+
+		u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
+
+		if (!(reg48 & u_flag))
+			pci_write_config_byte(dev, 0x48, reg48 | u_flag);
+		if (speed >= XFER_UDMA_5)
+			pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
+		else
+			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+
+		if ((reg4a & a_speed) != u_speed)
+			pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
+		if (speed > XFER_UDMA_2) {
+			if (!(reg54 & v_flag))
+				pci_write_config_byte(dev, 0x54, reg54 | v_flag);
+		} else
+			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+	} else {
+		const u8 mwdma_to_pio[] = { 0, 3, 4 };
+
+		if (reg48 & u_flag)
+			pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
+		if (reg4a & a_speed)
+			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+		if (reg54 & v_flag)
+			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+		if (reg55 & w_flag)
+			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+
+		if (speed >= XFER_MW_DMA_0)
+			drive->pio_mode =
+				mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
+		else
+			drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
+
+		it8213_set_pio_mode(hwif, drive);
+	}
+}
+
+static u8 it8213_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 reg42h = 0;
+
+	pci_read_config_byte(dev, 0x42, &reg42h);
+
+	return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static const struct ide_port_ops it8213_port_ops = {
+	.set_pio_mode		= it8213_set_pio_mode,
+	.set_dma_mode		= it8213_set_dma_mode,
+	.cable_detect		= it8213_cable_detect,
+};
+
+static const struct ide_port_info it8213_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { {0x41, 0x80, 0x80} },
+	.port_ops	= &it8213_port_ops,
+	.host_flags	= IDE_HFLAG_SINGLE,
+	.pio_mask	= ATA_PIO4,
+	.swdma_mask	= ATA_SWDMA2_ONLY,
+	.mwdma_mask	= ATA_MWDMA12_ONLY,
+	.udma_mask	= ATA_UDMA6,
+};
+
+/**
+ *	it8213_init_one	-	pci layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds an ITE8213 controller. As
+ *	this device follows the standard interfaces we can use the
+ *	standard helper functions to do almost all the work for us.
+ */
+
+static int it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &it8213_chipset, NULL);
+}
+
+static const struct pci_device_id it8213_pci_tbl[] = {
+	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, it8213_pci_tbl);
+
+static struct pci_driver it8213_pci_driver = {
+	.name		= "ITE8213_IDE",
+	.id_table	= it8213_pci_tbl,
+	.probe		= it8213_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init it8213_ide_init(void)
+{
+	return ide_pci_register_driver(&it8213_pci_driver);
+}
+
+static void __exit it8213_ide_exit(void)
+{
+	pci_unregister_driver(&it8213_pci_driver);
+}
+
+module_init(it8213_ide_init);
+module_exit(it8213_ide_exit);
+
+MODULE_AUTHOR("Jack Lee, Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the ITE 8213");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
new file mode 100644
index 000000000..36a64c8ea
--- /dev/null
+++ b/drivers/ide/it821x.c
@@ -0,0 +1,715 @@
+/*
+ * Copyright (C) 2004		Red Hat
+ * Copyright (C) 2007		Bartlomiej Zolnierkiewicz
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *  Based in part on the ITE vendor provided SCSI driver.
+ *
+ *  Documentation:
+ *	Datasheet is freely available, some other documents under NDA.
+ *
+ *  The ITE8212 isn't exactly a standard IDE controller. It has two
+ *  modes. In pass through mode then it is an IDE controller. In its smart
+ *  mode its actually quite a capable hardware raid controller disguised
+ *  as an IDE controller. Smart mode only understands DMA read/write and
+ *  identify, none of the fancier commands apply. The IT8211 is identical
+ *  in other respects but lacks the raid mode.
+ *
+ *  Errata:
+ *  o	Rev 0x10 also requires master/slave hold the same DMA timings and
+ *	cannot do ATAPI MWDMA.
+ *  o	The identify data for raid volumes lacks CHS info (technically ok)
+ *	but also fails to set the LBA28 and other bits. We fix these in
+ *	the IDE probe quirk code.
+ *  o	If you write LBA48 sized I/O's (ie > 256 sector) in smart mode
+ *	raid then the controller firmware dies
+ *  o	Smart mode without RAID doesn't clear all the necessary identify
+ *	bits to reduce the command set to the one used
+ *
+ *  This has a few impacts on the driver
+ *  - In pass through mode we do all the work you would expect
+ *  - In smart mode the clocking set up is done by the controller generally
+ *    but we must watch the other limits and filter.
+ *  - There are a few extra vendor commands that actually talk to the
+ *    controller but only work PIO with no IRQ.
+ *
+ *  Vendor areas of the identify block in smart mode are used for the
+ *  timing and policy set up. Each HDD in raid mode also has a serial
+ *  block on the disk. The hardware extra commands are get/set chip status,
+ *  rebuild, get rebuild status.
+ *
+ *  In Linux the driver supports pass through mode as if the device was
+ *  just another IDE controller. If the smart mode is running then
+ *  volumes are managed by the controller firmware and each IDE "disk"
+ *  is a raid volume. Even more cute - the controller can do automated
+ *  hotplug and rebuild.
+ *
+ *  The pass through controller itself is a little demented. It has a
+ *  flaw that it has a single set of PIO/MWDMA timings per channel so
+ *  non UDMA devices restrict each others performance. It also has a
+ *  single clock source per channel so mixed UDMA100/133 performance
+ *  isn't perfect and we have to pick a clock. Thankfully none of this
+ *  matters in smart mode. ATAPI DMA is not currently supported.
+ *
+ *  It seems the smart mode is a win for RAID1/RAID10 but otherwise not.
+ *
+ *  TODO
+ *	-	ATAPI UDMA is ok but not MWDMA it seems
+ *	-	RAID configuration ioctls
+ *	-	Move to libata once it grows up
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "it821x"
+
+#define QUIRK_VORTEX86 1
+
+struct it821x_dev
+{
+	unsigned int smart:1,		/* Are we in smart raid mode */
+		timing10:1;		/* Rev 0x10 */
+	u8	clock_mode;		/* 0, ATA_50 or ATA_66 */
+	u8	want[2][2];		/* Mode/Pri log for master slave */
+	/* We need these for switching the clock when DMA goes on/off
+	   The high byte is the 66Mhz timing */
+	u16	pio[2];			/* Cached PIO values */
+	u16	mwdma[2];		/* Cached MWDMA values */
+	u16	udma[2];		/* Cached UDMA values (per drive) */
+	u16	quirks;
+};
+
+#define ATA_66		0
+#define ATA_50		1
+#define ATA_ANY		2
+
+#define UDMA_OFF	0
+#define MWDMA_OFF	0
+
+/*
+ *	We allow users to force the card into non raid mode without
+ *	flashing the alternative BIOS. This is also necessary right now
+ *	for embedded platforms that cannot run a PC BIOS but are using this
+ *	device.
+ */
+
+static int it8212_noraid;
+
+/**
+ *	it821x_program	-	program the PIO/MWDMA registers
+ *	@drive: drive to tune
+ *	@timing: timing info
+ *
+ *	Program the PIO/MWDMA timing for this channel according to the
+ *	current clock.
+ */
+
+static void it821x_program(ide_drive_t *drive, u16 timing)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	int channel = hwif->channel;
+	u8 conf;
+
+	/* Program PIO/MWDMA timing bits */
+	if(itdev->clock_mode == ATA_66)
+		conf = timing >> 8;
+	else
+		conf = timing & 0xFF;
+
+	pci_write_config_byte(dev, 0x54 + 4 * channel, conf);
+}
+
+/**
+ *	it821x_program_udma	-	program the UDMA registers
+ *	@drive: drive to tune
+ *	@timing: timing info
+ *
+ *	Program the UDMA timing for this drive according to the
+ *	current clock.
+ */
+
+static void it821x_program_udma(ide_drive_t *drive, u16 timing)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	int channel = hwif->channel;
+	u8 unit = drive->dn & 1, conf;
+
+	/* Program UDMA timing bits */
+	if(itdev->clock_mode == ATA_66)
+		conf = timing >> 8;
+	else
+		conf = timing & 0xFF;
+
+	if (itdev->timing10 == 0)
+		pci_write_config_byte(dev, 0x56 + 4 * channel + unit, conf);
+	else {
+		pci_write_config_byte(dev, 0x56 + 4 * channel, conf);
+		pci_write_config_byte(dev, 0x56 + 4 * channel + 1, conf);
+	}
+}
+
+/**
+ *	it821x_clock_strategy
+ *	@drive: drive to set up
+ *
+ *	Select between the 50 and 66Mhz base clocks to get the best
+ *	results for this interface.
+ */
+
+static void it821x_clock_strategy(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	int clock, altclock, sel = 0;
+	u8 unit = drive->dn & 1, v;
+
+	if(itdev->want[0][0] > itdev->want[1][0]) {
+		clock = itdev->want[0][1];
+		altclock = itdev->want[1][1];
+	} else {
+		clock = itdev->want[1][1];
+		altclock = itdev->want[0][1];
+	}
+
+	/*
+	 * if both clocks can be used for the mode with the higher priority
+	 * use the clock needed by the mode with the lower priority
+	 */
+	if (clock == ATA_ANY)
+		clock = altclock;
+
+	/* Nobody cares - keep the same clock */
+	if(clock == ATA_ANY)
+		return;
+	/* No change */
+	if(clock == itdev->clock_mode)
+		return;
+
+	/* Load this into the controller ? */
+	if(clock == ATA_66)
+		itdev->clock_mode = ATA_66;
+	else {
+		itdev->clock_mode = ATA_50;
+		sel = 1;
+	}
+
+	pci_read_config_byte(dev, 0x50, &v);
+	v &= ~(1 << (1 + hwif->channel));
+	v |= sel << (1 + hwif->channel);
+	pci_write_config_byte(dev, 0x50, v);
+
+	/*
+	 *	Reprogram the UDMA/PIO of the pair drive for the switch
+	 *	MWDMA will be dealt with by the dma switcher
+	 */
+	if(pair && itdev->udma[1-unit] != UDMA_OFF) {
+		it821x_program_udma(pair, itdev->udma[1-unit]);
+		it821x_program(pair, itdev->pio[1-unit]);
+	}
+	/*
+	 *	Reprogram the UDMA/PIO of our drive for the switch.
+	 *	MWDMA will be dealt with by the dma switcher
+	 */
+	if(itdev->udma[unit] != UDMA_OFF) {
+		it821x_program_udma(drive, itdev->udma[unit]);
+		it821x_program(drive, itdev->pio[unit]);
+	}
+}
+
+/**
+ *	it821x_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Tune the host to the desired PIO mode taking into the consideration
+ *	the maximum PIO mode supported by the other device on the cable.
+ */
+
+static void it821x_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	u8 unit = drive->dn & 1, set_pio = pio;
+
+	/* Spec says 89 ref driver uses 88 */
+	static u16 pio_timings[]= { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 };
+	static u8 pio_want[]    = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY };
+
+	/*
+	 * Compute the best PIO mode we can for a given device. We must
+	 * pick a speed that does not cause problems with the other device
+	 * on the cable.
+	 */
+	if (pair) {
+		u8 pair_pio = pair->pio_mode - XFER_PIO_0;
+		/* trim PIO to the slowest of the master/slave */
+		if (pair_pio < set_pio)
+			set_pio = pair_pio;
+	}
+
+	/* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */
+	itdev->want[unit][1] = pio_want[set_pio];
+	itdev->want[unit][0] = 1;	/* PIO is lowest priority */
+	itdev->pio[unit] = pio_timings[set_pio];
+	it821x_clock_strategy(drive);
+	it821x_program(drive, itdev->pio[unit]);
+}
+
+/**
+ *	it821x_tune_mwdma	-	tune a channel for MWDMA
+ *	@drive: drive to set up
+ *	@mode_wanted: the target operating mode
+ *
+ *	Load the timing settings for this device mode into the
+ *	controller when doing MWDMA in pass through mode. The caller
+ *	must manage the whole lack of per device MWDMA/PIO timings and
+ *	the shared MWDMA/PIO timing register.
+ */
+
+static void it821x_tune_mwdma(ide_drive_t *drive, u8 mode_wanted)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct it821x_dev *itdev = (void *)ide_get_hwifdata(hwif);
+	u8 unit = drive->dn & 1, channel = hwif->channel, conf;
+
+	static u16 dma[]	= { 0x8866, 0x3222, 0x3121 };
+	static u8 mwdma_want[]	= { ATA_ANY, ATA_66, ATA_ANY };
+
+	itdev->want[unit][1] = mwdma_want[mode_wanted];
+	itdev->want[unit][0] = 2;	/* MWDMA is low priority */
+	itdev->mwdma[unit] = dma[mode_wanted];
+	itdev->udma[unit] = UDMA_OFF;
+
+	/* UDMA bits off - Revision 0x10 do them in pairs */
+	pci_read_config_byte(dev, 0x50, &conf);
+	if (itdev->timing10)
+		conf |= channel ? 0x60: 0x18;
+	else
+		conf |= 1 << (3 + 2 * channel + unit);
+	pci_write_config_byte(dev, 0x50, conf);
+
+	it821x_clock_strategy(drive);
+	/* FIXME: do we need to program this ? */
+	/* it821x_program(drive, itdev->mwdma[unit]); */
+}
+
+/**
+ *	it821x_tune_udma	-	tune a channel for UDMA
+ *	@drive: drive to set up
+ *	@mode_wanted: the target operating mode
+ *
+ *	Load the timing settings for this device mode into the
+ *	controller when doing UDMA modes in pass through.
+ */
+
+static void it821x_tune_udma(ide_drive_t *drive, u8 mode_wanted)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	u8 unit = drive->dn & 1, channel = hwif->channel, conf;
+
+	static u16 udma[]	= { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 };
+	static u8 udma_want[]	= { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 };
+
+	itdev->want[unit][1] = udma_want[mode_wanted];
+	itdev->want[unit][0] = 3;	/* UDMA is high priority */
+	itdev->mwdma[unit] = MWDMA_OFF;
+	itdev->udma[unit] = udma[mode_wanted];
+	if(mode_wanted >= 5)
+		itdev->udma[unit] |= 0x8080;	/* UDMA 5/6 select on */
+
+	/* UDMA on. Again revision 0x10 must do the pair */
+	pci_read_config_byte(dev, 0x50, &conf);
+	if (itdev->timing10)
+		conf &= channel ? 0x9F: 0xE7;
+	else
+		conf &= ~ (1 << (3 + 2 * channel + unit));
+	pci_write_config_byte(dev, 0x50, conf);
+
+	it821x_clock_strategy(drive);
+	it821x_program_udma(drive, itdev->udma[unit]);
+
+}
+
+/**
+ *	it821x_dma_read	-	DMA hook
+ *	@drive: drive for DMA
+ *
+ *	The IT821x has a single timing register for MWDMA and for PIO
+ *	operations. As we flip back and forth we have to reload the
+ *	clock. In addition the rev 0x10 device only works if the same
+ *	timing value is loaded into the master and slave UDMA clock
+ * 	so we must also reload that.
+ *
+ *	FIXME: we could figure out in advance if we need to do reloads
+ */
+
+static void it821x_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	u8 unit = drive->dn & 1;
+
+	if(itdev->mwdma[unit] != MWDMA_OFF)
+		it821x_program(drive, itdev->mwdma[unit]);
+	else if(itdev->udma[unit] != UDMA_OFF && itdev->timing10)
+		it821x_program_udma(drive, itdev->udma[unit]);
+	ide_dma_start(drive);
+}
+
+/**
+ *	it821x_dma_write	-	DMA hook
+ *	@drive: drive for DMA stop
+ *
+ *	The IT821x has a single timing register for MWDMA and for PIO
+ *	operations. As we flip back and forth we have to reload the
+ *	clock.
+ */
+
+static int it821x_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct it821x_dev *itdev = ide_get_hwifdata(hwif);
+	int ret = ide_dma_end(drive);
+	u8 unit = drive->dn & 1;
+
+	if(itdev->mwdma[unit] != MWDMA_OFF)
+		it821x_program(drive, itdev->pio[unit]);
+	return ret;
+}
+
+/**
+ *	it821x_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Tune the ITE chipset for the desired DMA mode.
+ */
+
+static void it821x_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 speed = drive->dma_mode;
+
+	/*
+	 * MWDMA tuning is really hard because our MWDMA and PIO
+	 * timings are kept in the same place.  We can switch in the
+	 * host dma on/off callbacks.
+	 */
+	if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_6)
+		it821x_tune_udma(drive, speed - XFER_UDMA_0);
+	else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
+		it821x_tune_mwdma(drive, speed - XFER_MW_DMA_0);
+}
+
+/**
+ *	it821x_cable_detect	-	cable detection
+ *	@hwif: interface to check
+ *
+ *	Check for the presence of an ATA66 capable cable on the
+ *	interface. Problematic as it seems some cards don't have
+ *	the needed logic onboard.
+ */
+
+static u8 it821x_cable_detect(ide_hwif_t *hwif)
+{
+	/* The reference driver also only does disk side */
+	return ATA_CBL_PATA80;
+}
+
+/**
+ *	it821x_quirkproc	-	post init callback
+ *	@drive: drive
+ *
+ *	This callback is run after the drive has been probed but
+ *	before anything gets attached. It allows drivers to do any
+ *	final tuning that is needed, or fixups to work around bugs.
+ */
+
+static void it821x_quirkproc(ide_drive_t *drive)
+{
+	struct it821x_dev *itdev = ide_get_hwifdata(drive->hwif);
+	u16 *id = drive->id;
+
+	if (!itdev->smart) {
+		/*
+		 *	If we are in pass through mode then not much
+		 *	needs to be done, but we do bother to clear the
+		 *	IRQ mask as we may well be in PIO (eg rev 0x10)
+		 *	for now and we know unmasking is safe on this chipset.
+		 */
+		drive->dev_flags |= IDE_DFLAG_UNMASK;
+	} else {
+	/*
+	 *	Perform fixups on smart mode. We need to "lose" some
+	 *	capabilities the firmware lacks but does not filter, and
+	 *	also patch up some capability bits that it forgets to set
+	 *	in RAID mode.
+	 */
+
+		/* Check for RAID v native */
+		if (strstr((char *)&id[ATA_ID_PROD],
+			   "Integrated Technology Express")) {
+			/* In raid mode the ident block is slightly buggy
+			   We need to set the bits so that the IDE layer knows
+			   LBA28. LBA48 and DMA ar valid */
+			id[ATA_ID_CAPABILITY]    |= (3 << 8); /* LBA28, DMA */
+			id[ATA_ID_COMMAND_SET_2] |= 0x0400;   /* LBA48 valid */
+			id[ATA_ID_CFS_ENABLE_2]  |= 0x0400;   /* LBA48 on */
+			/* Reporting logic */
+			printk(KERN_INFO "%s: IT8212 %sRAID %d volume",
+				drive->name, id[147] ? "Bootable " : "",
+				id[ATA_ID_CSFO]);
+			if (id[ATA_ID_CSFO] != 1)
+				printk(KERN_CONT "(%dK stripe)", id[146]);
+			printk(KERN_CONT ".\n");
+		} else {
+			/* Non RAID volume. Fixups to stop the core code
+			   doing unsupported things */
+			id[ATA_ID_FIELD_VALID]	 &= 3;
+			id[ATA_ID_QUEUE_DEPTH]	  = 0;
+			id[ATA_ID_COMMAND_SET_1]  = 0;
+			id[ATA_ID_COMMAND_SET_2] &= 0xC400;
+			id[ATA_ID_CFSSE]	 &= 0xC000;
+			id[ATA_ID_CFS_ENABLE_1]	  = 0;
+			id[ATA_ID_CFS_ENABLE_2]	 &= 0xC400;
+			id[ATA_ID_CSF_DEFAULT]	 &= 0xC000;
+			id[127]			  = 0;
+			id[ATA_ID_DLF]		  = 0;
+			id[ATA_ID_CSFO]		  = 0;
+			id[ATA_ID_CFA_POWER]	  = 0;
+			printk(KERN_INFO "%s: Performing identify fixups.\n",
+				drive->name);
+		}
+
+		/*
+		 * Set MWDMA0 mode as enabled/support - just to tell
+		 * IDE core that DMA is supported (it821x hardware
+		 * takes care of DMA mode programming).
+		 */
+		if (ata_id_has_dma(id)) {
+			id[ATA_ID_MWDMA_MODES] |= 0x0101;
+			drive->current_speed = XFER_MW_DMA_0;
+		}
+	}
+
+}
+
+static const struct ide_dma_ops it821x_pass_through_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= it821x_dma_start,
+	.dma_end		= it821x_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+/**
+ *	init_hwif_it821x	-	set up hwif structs
+ *	@hwif: interface to set up
+ *
+ *	We do the basic set up of the interface structure. The IT8212
+ *	requires several custom handlers so we override the default
+ *	ide DMA handlers appropriately
+ */
+
+static void init_hwif_it821x(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct it821x_dev *itdevs = host->host_priv;
+	struct it821x_dev *idev = itdevs + hwif->channel;
+	u8 conf;
+
+	ide_set_hwifdata(hwif, idev);
+
+	pci_read_config_byte(dev, 0x50, &conf);
+	if (conf & 1) {
+		idev->smart = 1;
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
+		/* Long I/O's although allowed in LBA48 space cause the
+		   onboard firmware to enter the twighlight zone */
+		hwif->rqsize = 256;
+	}
+
+	/* Pull the current clocks from 0x50 also */
+	if (conf & (1 << (1 + hwif->channel)))
+		idev->clock_mode = ATA_50;
+	else
+		idev->clock_mode = ATA_66;
+
+	idev->want[0][1] = ATA_ANY;
+	idev->want[1][1] = ATA_ANY;
+
+	/*
+	 *	Not in the docs but according to the reference driver
+	 *	this is necessary.
+	 */
+
+	if (dev->revision == 0x10) {
+		idev->timing10 = 1;
+		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
+		if (idev->smart == 0)
+			printk(KERN_WARNING DRV_NAME " %s: revision 0x10, "
+				"workarounds activated\n", pci_name(dev));
+	}
+
+	if (idev->smart == 0) {
+		/* MWDMA/PIO clock switching for pass through mode */
+		hwif->dma_ops = &it821x_pass_through_dma_ops;
+	} else
+		hwif->host_flags |= IDE_HFLAG_NO_SET_MODE;
+
+	if (hwif->dma_base == 0)
+		return;
+
+	hwif->ultra_mask = ATA_UDMA6;
+	hwif->mwdma_mask = ATA_MWDMA2;
+
+	/* Vortex86SX quirk: prevent Ultra-DMA mode to fix BadCRC issue */
+	if (idev->quirks & QUIRK_VORTEX86) {
+		if (dev->revision == 0x11)
+			hwif->ultra_mask = 0;
+	}
+}
+
+static void it8212_disable_raid(struct pci_dev *dev)
+{
+	/* Reset local CPU, and set BIOS not ready */
+	pci_write_config_byte(dev, 0x5E, 0x01);
+
+	/* Set to bypass mode, and reset PCI bus */
+	pci_write_config_byte(dev, 0x50, 0x00);
+	pci_write_config_word(dev, PCI_COMMAND,
+			      PCI_COMMAND_PARITY | PCI_COMMAND_IO |
+			      PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+	pci_write_config_word(dev, 0x40, 0xA0F3);
+
+	pci_write_config_dword(dev,0x4C, 0x02040204);
+	pci_write_config_byte(dev, 0x42, 0x36);
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20);
+}
+
+static int init_chipset_it821x(struct pci_dev *dev)
+{
+	u8 conf;
+	static char *mode[2] = { "pass through", "smart" };
+
+	/* Force the card into bypass mode if so requested */
+	if (it8212_noraid) {
+		printk(KERN_INFO DRV_NAME " %s: forcing bypass mode\n",
+			pci_name(dev));
+		it8212_disable_raid(dev);
+	}
+	pci_read_config_byte(dev, 0x50, &conf);
+	printk(KERN_INFO DRV_NAME " %s: controller in %s mode\n",
+		pci_name(dev), mode[conf & 1]);
+	return 0;
+}
+
+static const struct ide_port_ops it821x_port_ops = {
+	/* it821x_set_{pio,dma}_mode() are only used in pass-through mode */
+	.set_pio_mode		= it821x_set_pio_mode,
+	.set_dma_mode		= it821x_set_dma_mode,
+	.quirkproc		= it821x_quirkproc,
+	.cable_detect		= it821x_cable_detect,
+};
+
+static const struct ide_port_info it821x_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_it821x,
+	.init_hwif	= init_hwif_it821x,
+	.port_ops	= &it821x_port_ops,
+	.pio_mask	= ATA_PIO4,
+};
+
+/**
+ *	it821x_init_one	-	pci layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds an ITE821x controller.
+ *	We then use the IDE PCI generic helper to do most of the work.
+ */
+
+static int it821x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct it821x_dev *itdevs;
+	int rc;
+
+	itdevs = kcalloc(2, sizeof(*itdevs), GFP_KERNEL);
+	if (itdevs == NULL) {
+		printk(KERN_ERR DRV_NAME " %s: out of memory\n", pci_name(dev));
+		return -ENOMEM;
+	}
+
+	itdevs->quirks = id->driver_data;
+
+	rc = ide_pci_init_one(dev, &it821x_chipset, itdevs);
+	if (rc)
+		kfree(itdevs);
+
+	return rc;
+}
+
+static void it821x_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct it821x_dev *itdevs = host->host_priv;
+
+	ide_pci_remove(dev);
+	kfree(itdevs);
+}
+
+static const struct pci_device_id it821x_pci_tbl[] = {
+	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), 0 },
+	{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), 0 },
+	{ PCI_VDEVICE(RDC, PCI_DEVICE_ID_RDC_D1010), QUIRK_VORTEX86 },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, it821x_pci_tbl);
+
+static struct pci_driver it821x_pci_driver = {
+	.name		= "ITE821x IDE",
+	.id_table	= it821x_pci_tbl,
+	.probe		= it821x_init_one,
+	.remove		= it821x_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init it821x_ide_init(void)
+{
+	return ide_pci_register_driver(&it821x_pci_driver);
+}
+
+static void __exit it821x_ide_exit(void)
+{
+	pci_unregister_driver(&it821x_pci_driver);
+}
+
+module_init(it821x_ide_init);
+module_exit(it821x_ide_exit);
+
+module_param_named(noraid, it8212_noraid, int, S_IRUGO);
+MODULE_PARM_DESC(noraid, "Force card into bypass mode");
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the ITE 821x");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/jmicron.c b/drivers/ide/jmicron.c
new file mode 100644
index 000000000..ae6480dcb
--- /dev/null
+++ b/drivers/ide/jmicron.c
@@ -0,0 +1,176 @@
+
+/*
+ * Copyright (C) 2006		Red Hat
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "jmicron"
+
+typedef enum {
+	PORT_PATA0 = 0,
+	PORT_PATA1 = 1,
+	PORT_SATA = 2,
+} port_type;
+
+/**
+ *	jmicron_cable_detect	-	cable detection
+ *	@hwif: IDE port
+ *
+ *	Returns the cable type.
+ */
+
+static u8 jmicron_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+
+	u32 control;
+	u32 control5;
+
+	int port = hwif->channel;
+	port_type port_map[2];
+
+	pci_read_config_dword(pdev, 0x40, &control);
+
+	/* There are two basic mappings. One has the two SATA ports merged
+	   as master/slave and the secondary as PATA, the other has only the
+	   SATA port mapped */
+	if (control & (1 << 23)) {
+		port_map[0] = PORT_SATA;
+		port_map[1] = PORT_PATA0;
+	} else {
+		port_map[0] = PORT_SATA;
+		port_map[1] = PORT_SATA;
+	}
+
+	/* The 365/366 may have this bit set to map the second PATA port
+	   as the internal primary channel */
+	pci_read_config_dword(pdev, 0x80, &control5);
+	if (control5 & (1<<24))
+		port_map[0] = PORT_PATA1;
+
+	/* The two ports may then be logically swapped by the firmware */
+	if (control & (1 << 22))
+		port = port ^ 1;
+
+	/*
+	 *	Now we know which physical port we are talking about we can
+	 *	actually do our cable checking etc. Thankfully we don't need
+	 *	to do the plumbing for other cases.
+	 */
+	switch (port_map[port]) {
+	case PORT_PATA0:
+		if (control & (1 << 3))	/* 40/80 pin primary */
+			return ATA_CBL_PATA40;
+		return ATA_CBL_PATA80;
+	case PORT_PATA1:
+		if (control5 & (1 << 19))	/* 40/80 pin secondary */
+			return ATA_CBL_PATA40;
+		return ATA_CBL_PATA80;
+	case PORT_SATA:
+		break;
+	}
+	/* Avoid bogus "control reaches end of non-void function" */
+	return ATA_CBL_PATA80;
+}
+
+static void jmicron_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+}
+
+/**
+ *	jmicron_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	As the JMicron snoops for timings we don't need to do anything here.
+ */
+
+static void jmicron_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+}
+
+static const struct ide_port_ops jmicron_port_ops = {
+	.set_pio_mode		= jmicron_set_pio_mode,
+	.set_dma_mode		= jmicron_set_dma_mode,
+	.cable_detect		= jmicron_cable_detect,
+};
+
+static const struct ide_port_info jmicron_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { { 0x40, 0x01, 0x01 }, { 0x40, 0x10, 0x10 } },
+	.port_ops	= &jmicron_port_ops,
+	.pio_mask	= ATA_PIO5,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA6,
+};
+
+/**
+ *	jmicron_init_one	-	pci layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds a Jmicron controller.
+ *	We then use the IDE PCI generic helper to do most of the work.
+ */
+
+static int jmicron_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &jmicron_chipset, NULL);
+}
+
+/* All JMB PATA controllers have and will continue to have the same
+ * interface.  Matching vendor and device class is enough for all
+ * current and future controllers if the controller is programmed
+ * properly.
+ *
+ * If libata is configured, jmicron PCI quirk programs the controller
+ * into the correct mode.  If libata isn't configured, match known
+ * device IDs too to maintain backward compatibility.
+ */
+static struct pci_device_id jmicron_pci_tbl[] = {
+#if !defined(CONFIG_ATA) && !defined(CONFIG_ATA_MODULE)
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB361) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB363) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB365) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB366) },
+	{ PCI_VDEVICE(JMICRON, PCI_DEVICE_ID_JMICRON_JMB368) },
+#endif
+	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+	  PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
+
+static struct pci_driver jmicron_pci_driver = {
+	.name		= "JMicron IDE",
+	.id_table	= jmicron_pci_tbl,
+	.probe		= jmicron_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init jmicron_ide_init(void)
+{
+	return ide_pci_register_driver(&jmicron_pci_driver);
+}
+
+static void __exit jmicron_ide_exit(void)
+{
+	pci_unregister_driver(&jmicron_pci_driver);
+}
+
+module_init(jmicron_ide_init);
+module_exit(jmicron_ide_exit);
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for the JMicron in legacy modes");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/macide.c b/drivers/ide/macide.c
new file mode 100644
index 000000000..8d2bf73bc
--- /dev/null
+++ b/drivers/ide/macide.c
@@ -0,0 +1,161 @@
+/*
+ *  Macintosh IDE Driver
+ *
+ *     Copyright (C) 1998 by Michael Schmitz
+ *
+ *  This driver was written based on information obtained from the MacOS IDE
+ *  driver binary by Mikael Forselius
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/macintosh.h>
+
+#define DRV_NAME "mac_ide"
+
+#define IDE_BASE 0x50F1A000	/* Base address of IDE controller */
+
+/*
+ * Generic IDE registers as offsets from the base
+ * These match MkLinux so they should be correct.
+ */
+
+#define IDE_CONTROL	0x38	/* control/altstatus */
+
+/*
+ * Mac-specific registers
+ */
+
+/*
+ * this register is odd; it doesn't seem to do much and it's
+ * not word-aligned like virtually every other hardware register
+ * on the Mac...
+ */
+
+#define IDE_IFR		0x101	/* (0x101) IDE interrupt flags on Quadra:
+				 *
+				 * Bit 0+1: some interrupt flags
+				 * Bit 2+3: some interrupt enable
+				 * Bit 4:   ??
+				 * Bit 5:   IDE interrupt flag (any hwif)
+				 * Bit 6:   maybe IDE interrupt enable (any hwif) ??
+				 * Bit 7:   Any interrupt condition
+				 */
+
+volatile unsigned char *ide_ifr = (unsigned char *) (IDE_BASE + IDE_IFR);
+
+int macide_test_irq(ide_hwif_t *hwif)
+{
+	if (*ide_ifr & 0x20)
+		return 1;
+	return 0;
+}
+
+static void macide_clear_irq(ide_drive_t *drive)
+{
+	*ide_ifr &= ~0x20;
+}
+
+static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
+				      int irq)
+{
+	int i;
+
+	memset(hw, 0, sizeof(*hw));
+
+	for (i = 0; i < 8; i++)
+		hw->io_ports_array[i] = base + i * 4;
+
+	hw->io_ports.ctl_addr = base + IDE_CONTROL;
+
+	hw->irq = irq;
+}
+
+static const struct ide_port_ops macide_port_ops = {
+	.clear_irq		= macide_clear_irq,
+	.test_irq		= macide_test_irq,
+};
+
+static const struct ide_port_info macide_port_info = {
+	.port_ops		= &macide_port_ops,
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+static const char *mac_ide_name[] =
+	{ "Quadra", "Powerbook", "Powerbook Baboon" };
+
+/*
+ * Probe for a Macintosh IDE interface
+ */
+
+static int mac_ide_probe(struct platform_device *pdev)
+{
+	struct resource *mem, *irq;
+	struct ide_hw hw, *hws[] = { &hw };
+	struct ide_port_info d = macide_port_info;
+	struct ide_host *host;
+	int rc;
+
+	if (!MACH_IS_MAC)
+		return -ENODEV;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem)
+		return -ENODEV;
+
+	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!irq)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, mem->start,
+				     resource_size(mem), DRV_NAME)) {
+		dev_err(&pdev->dev, "resources busy\n");
+		return -EBUSY;
+	}
+
+	printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
+			 mac_ide_name[macintosh_config->ide_type - 1]);
+
+	macide_setup_ports(&hw, mem->start, irq->start);
+
+	rc = ide_host_add(&d, hws, 1, &host);
+	if (rc)
+		return rc;
+
+	platform_set_drvdata(pdev, host);
+	return 0;
+}
+
+static int mac_ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+
+	ide_host_remove(host);
+	return 0;
+}
+
+static struct platform_driver mac_ide_driver = {
+	.driver = {
+		.name = DRV_NAME,
+	},
+	.probe  = mac_ide_probe,
+	.remove = mac_ide_remove,
+};
+
+module_platform_driver(mac_ide_driver);
+
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c
new file mode 100644
index 000000000..11a672aba
--- /dev/null
+++ b/drivers/ide/ns87415.c
@@ -0,0 +1,350 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 1997-1998	Mark Lord <mlord@pobox.com>
+ * Copyright (C) 1998		Eddie C. Dost <ecd@skynet.be>
+ * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2004		Grant Grundler <grundler at parisc-linux.org>
+ *
+ * Inspired by an earlier effort from David S. Miller <davem@redhat.com>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "ns87415"
+
+#ifdef CONFIG_SUPERIO
+/* SUPERIO 87560 is a PoS chip that NatSem denies exists.
+ * Unfortunately, it's built-in on all Astro-based PA-RISC workstations
+ * which use the integrated NS87514 cell for CD-ROM support.
+ * i.e we have to support for CD-ROM installs.
+ * See drivers/parisc/superio.c for more gory details.
+ */
+#include <asm/superio.h>
+
+#define SUPERIO_IDE_MAX_RETRIES 25
+
+/* Because of a defect in Super I/O, all reads of the PCI DMA status 
+ * registers, IDE status register and the IDE select register need to be 
+ * retried
+ */
+static u8 superio_ide_inb (unsigned long port)
+{
+	u8 tmp;
+	int retries = SUPERIO_IDE_MAX_RETRIES;
+
+	/* printk(" [ reading port 0x%x with retry ] ", port); */
+
+	do {
+		tmp = inb(port);
+		if (tmp == 0)
+			udelay(50);
+	} while (tmp == 0 && retries-- > 0);
+
+	return tmp;
+}
+
+static u8 superio_read_status(ide_hwif_t *hwif)
+{
+	return superio_ide_inb(hwif->io_ports.status_addr);
+}
+
+static u8 superio_dma_sff_read_status(ide_hwif_t *hwif)
+{
+	return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static void superio_tf_read(ide_drive_t *drive, struct ide_taskfile *tf,
+			    u8 valid)
+{
+	struct ide_io_ports *io_ports = &drive->hwif->io_ports;
+
+	if (valid & IDE_VALID_ERROR)
+		tf->error  = inb(io_ports->feature_addr);
+	if (valid & IDE_VALID_NSECT)
+		tf->nsect  = inb(io_ports->nsect_addr);
+	if (valid & IDE_VALID_LBAL)
+		tf->lbal   = inb(io_ports->lbal_addr);
+	if (valid & IDE_VALID_LBAM)
+		tf->lbam   = inb(io_ports->lbam_addr);
+	if (valid & IDE_VALID_LBAH)
+		tf->lbah   = inb(io_ports->lbah_addr);
+	if (valid & IDE_VALID_DEVICE)
+		tf->device = superio_ide_inb(io_ports->device_addr);
+}
+
+static void ns87415_dev_select(ide_drive_t *drive);
+
+static const struct ide_tp_ops superio_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= superio_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ns87415_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= superio_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static void superio_init_iops(struct hwif_s *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	u32 dma_stat;
+	u8 port = hwif->channel, tmp;
+
+	dma_stat = (pci_resource_start(pdev, 4) & ~3) + (!port ? 2 : 0xa);
+
+	/* Clear error/interrupt, enable dma */
+	tmp = superio_ide_inb(dma_stat);
+	outb(tmp | 0x66, dma_stat);
+}
+#else
+#define superio_dma_sff_read_status ide_dma_sff_read_status
+#endif
+
+static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
+
+/*
+ * This routine either enables/disables (according to IDE_DFLAG_PRESENT)
+ * the IRQ associated with the port,
+ * and selects either PIO or DMA handshaking for the next I/O operation.
+ */
+static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;
+	unsigned long flags;
+
+	local_irq_save(flags);
+	new = *old;
+
+	/* Adjust IRQ enable bit */
+	bit = 1 << (8 + hwif->channel);
+
+	if (drive->dev_flags & IDE_DFLAG_PRESENT)
+		new &= ~bit;
+	else
+		new |= bit;
+
+	/* Select PIO or DMA, DMA may only be selected for one drive/channel. */
+	bit   = 1 << (20 + (drive->dn & 1) + (hwif->channel << 1));
+	other = 1 << (20 + (1 - (drive->dn & 1)) + (hwif->channel << 1));
+	new = use_dma ? ((new & ~other) | bit) : (new & ~bit);
+
+	if (new != *old) {
+		unsigned char stat;
+
+		/*
+		 * Don't change DMA engine settings while Write Buffers
+		 * are busy.
+		 */
+		(void) pci_read_config_byte(dev, 0x43, &stat);
+		while (stat & 0x03) {
+			udelay(1);
+			(void) pci_read_config_byte(dev, 0x43, &stat);
+		}
+
+		*old = new;
+		(void) pci_write_config_dword(dev, 0x40, new);
+
+		/*
+		 * And let things settle...
+		 */
+		udelay(10);
+	}
+
+	local_irq_restore(flags);
+}
+
+static void ns87415_dev_select(ide_drive_t *drive)
+{
+	ns87415_prepare_drive(drive,
+			      !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
+
+	outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
+}
+
+static void ns87415_dma_start(ide_drive_t *drive)
+{
+	ns87415_prepare_drive(drive, 1);
+	ide_dma_start(drive);
+}
+
+static int ns87415_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat = 0, dma_cmd = 0;
+
+	dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+	/* get DMA command mode */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	/* stop DMA */
+	outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+	/* from ERRATA: clear the INTR & ERROR bits */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
+
+	ns87415_prepare_drive(drive, 0);
+
+	/* verify good DMA status */
+	return (dma_stat & 7) != 4;
+}
+
+static void init_hwif_ns87415 (ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned int ctrl, using_inta;
+	u8 progif;
+#ifdef __sparc_v9__
+	int timeout;
+	u8 stat;
+#endif
+
+	/*
+	 * We cannot probe for IRQ: both ports share common IRQ on INTA.
+	 * Also, leave IRQ masked during drive probing, to prevent infinite
+	 * interrupts from a potentially floating INTA..
+	 *
+	 * IRQs get unmasked in dev_select() when drive is first used.
+	 */
+	(void) pci_read_config_dword(dev, 0x40, &ctrl);
+	(void) pci_read_config_byte(dev, 0x09, &progif);
+	/* is irq in "native" mode? */
+	using_inta = progif & (1 << (hwif->channel << 1));
+	if (!using_inta)
+		using_inta = ctrl & (1 << (4 + hwif->channel));
+	if (hwif->mate) {
+		hwif->select_data = hwif->mate->select_data;
+	} else {
+		hwif->select_data = (unsigned long)
+					&ns87415_control[ns87415_count++];
+		ctrl |= (1 << 8) | (1 << 9);	/* mask both IRQs */
+		if (using_inta)
+			ctrl &= ~(1 << 6);	/* unmask INTA */
+		*((unsigned int *)hwif->select_data) = ctrl;
+		(void) pci_write_config_dword(dev, 0x40, ctrl);
+
+		/*
+		 * Set prefetch size to 512 bytes for both ports,
+		 * but don't turn on/off prefetching here.
+		 */
+		pci_write_config_byte(dev, 0x55, 0xee);
+
+#ifdef __sparc_v9__
+		/*
+		 * XXX: Reset the device, if we don't it will not respond to
+		 *      dev_select() properly during first ide_probe_port().
+		 */
+		timeout = 10000;
+		outb(12, hwif->io_ports.ctl_addr);
+		udelay(10);
+		outb(8, hwif->io_ports.ctl_addr);
+		do {
+			udelay(50);
+			stat = hwif->tp_ops->read_status(hwif);
+			if (stat == 0xff)
+				break;
+		} while ((stat & ATA_BUSY) && --timeout);
+#endif
+	}
+
+	if (!using_inta)
+		hwif->irq = pci_get_legacy_ide_irq(dev, hwif->channel);
+
+	if (!hwif->dma_base)
+		return;
+
+	outb(0x60, hwif->dma_base + ATA_DMA_STATUS);
+}
+
+static const struct ide_tp_ops ns87415_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ns87415_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_dma_ops ns87415_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ns87415_dma_start,
+	.dma_end		= ns87415_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= superio_dma_sff_read_status,
+};
+
+static const struct ide_port_info ns87415_chipset = {
+	.name		= DRV_NAME,
+	.init_hwif	= init_hwif_ns87415,
+	.tp_ops 	= &ns87415_tp_ops,
+	.dma_ops	= &ns87415_dma_ops,
+	.host_flags	= IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+			  IDE_HFLAG_NO_ATAPI_DMA,
+};
+
+static int ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d = ns87415_chipset;
+
+#ifdef CONFIG_SUPERIO
+	if (PCI_SLOT(dev->devfn) == 0xE) {
+		/* Built-in - assume it's under superio. */
+		d.init_iops = superio_init_iops;
+		d.tp_ops = &superio_tp_ops;
+	}
+#endif
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id ns87415_pci_tbl[] = {
+	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87415), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, ns87415_pci_tbl);
+
+static struct pci_driver ns87415_pci_driver = {
+	.name		= "NS87415_IDE",
+	.id_table	= ns87415_pci_tbl,
+	.probe		= ns87415_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init ns87415_ide_init(void)
+{
+	return ide_pci_register_driver(&ns87415_pci_driver);
+}
+
+static void __exit ns87415_ide_exit(void)
+{
+	pci_unregister_driver(&ns87415_pci_driver);
+}
+
+module_init(ns87415_ide_init);
+module_exit(ns87415_ide_exit);
+
+MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/opti621.c b/drivers/ide/opti621.c
new file mode 100644
index 000000000..c374f8233
--- /dev/null
+++ b/drivers/ide/opti621.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1996-1998  Linus Torvalds & authors (see below)
+ */
+
+/*
+ * Authors:
+ * Jaromir Koutek <miri@punknet.cz>,
+ * Jan Harkes <jaharkes@cwi.nl>,
+ * Mark Lord <mlord@pobox.com>
+ * Some parts of code are from ali14xx.c and from rz1000.c.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "opti621"
+
+#define READ_REG 0	/* index of Read cycle timing register */
+#define WRITE_REG 1	/* index of Write cycle timing register */
+#define CNTRL_REG 3	/* index of Control register */
+#define STRAP_REG 5	/* index of Strap register */
+#define MISC_REG 6	/* index of Miscellaneous register */
+
+static int reg_base;
+
+static DEFINE_SPINLOCK(opti621_lock);
+
+/* Write value to register reg, base of register
+ * is at reg_base (0x1f0 primary, 0x170 secondary,
+ * if not changed by PCI configuration).
+ * This is from setupvic.exe program.
+ */
+static void write_reg(u8 value, int reg)
+{
+	inw(reg_base + 1);
+	inw(reg_base + 1);
+	outb(3, reg_base + 2);
+	outb(value, reg_base + reg);
+	outb(0x83, reg_base + 2);
+}
+
+/* Read value from register reg, base of register
+ * is at reg_base (0x1f0 primary, 0x170 secondary,
+ * if not changed by PCI configuration).
+ * This is from setupvic.exe program.
+ */
+static u8 read_reg(int reg)
+{
+	u8 ret = 0;
+
+	inw(reg_base + 1);
+	inw(reg_base + 1);
+	outb(3, reg_base + 2);
+	ret = inb(reg_base + reg);
+	outb(0x83, reg_base + 2);
+
+	return ret;
+}
+
+static void opti621_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	ide_drive_t *pair = ide_get_pair_dev(drive);
+	unsigned long flags;
+	unsigned long mode = drive->pio_mode, pair_mode;
+	const u8 pio = mode - XFER_PIO_0;
+	u8 tim, misc, addr_pio = pio, clk;
+
+	/* DRDY is default 2 (by OPTi Databook) */
+	static const u8 addr_timings[2][5] = {
+		{ 0x20, 0x10, 0x00, 0x00, 0x00 },	/* 33 MHz */
+		{ 0x10, 0x10, 0x00, 0x00, 0x00 },	/* 25 MHz */
+	};
+	static const u8 data_rec_timings[2][5] = {
+		{ 0x5b, 0x45, 0x32, 0x21, 0x20 },	/* 33 MHz */
+		{ 0x48, 0x34, 0x21, 0x10, 0x10 }	/* 25 MHz */
+	};
+
+	ide_set_drivedata(drive, (void *)mode);
+
+	if (pair) {
+		pair_mode = (unsigned long)ide_get_drivedata(pair);
+		if (pair_mode && pair_mode < mode)
+			addr_pio = pair_mode - XFER_PIO_0;
+	}
+
+	spin_lock_irqsave(&opti621_lock, flags);
+
+	reg_base = hwif->io_ports.data_addr;
+
+	/* allow Register-B */
+	outb(0xc0, reg_base + CNTRL_REG);
+	/* hmm, setupvic.exe does this ;-) */
+	outb(0xff, reg_base + 5);
+	/* if reads 0xff, adapter not exist? */
+	(void)inb(reg_base + CNTRL_REG);
+	/* if reads 0xc0, no interface exist? */
+	read_reg(CNTRL_REG);
+
+	/* check CLK speed */
+	clk = read_reg(STRAP_REG) & 1;
+
+	printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
+
+	tim  = data_rec_timings[clk][pio];
+	misc = addr_timings[clk][addr_pio];
+
+	/* select Index-0/1 for Register-A/B */
+	write_reg(drive->dn & 1, MISC_REG);
+	/* set read cycle timings */
+	write_reg(tim, READ_REG);
+	/* set write cycle timings */
+	write_reg(tim, WRITE_REG);
+
+	/* use Register-A for drive 0 */
+	/* use Register-B for drive 1 */
+	write_reg(0x85, CNTRL_REG);
+
+	/* set address setup, DRDY timings,   */
+	/*  and read prefetch for both drives */
+	write_reg(misc, MISC_REG);
+
+	spin_unlock_irqrestore(&opti621_lock, flags);
+}
+
+static const struct ide_port_ops opti621_port_ops = {
+	.set_pio_mode		= opti621_set_pio_mode,
+};
+
+static const struct ide_port_info opti621_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
+	.port_ops	= &opti621_port_ops,
+	.host_flags	= IDE_HFLAG_NO_DMA,
+	.pio_mask	= ATA_PIO4,
+};
+
+static int opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &opti621_chipset, NULL);
+}
+
+static const struct pci_device_id opti621_pci_tbl[] = {
+	{ PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 },
+	{ PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, opti621_pci_tbl);
+
+static struct pci_driver opti621_pci_driver = {
+	.name		= "Opti621_IDE",
+	.id_table	= opti621_pci_tbl,
+	.probe		= opti621_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init opti621_ide_init(void)
+{
+	return ide_pci_register_driver(&opti621_pci_driver);
+}
+
+static void __exit opti621_ide_exit(void)
+{
+	pci_unregister_driver(&opti621_pci_driver);
+}
+
+module_init(opti621_ide_init);
+module_exit(opti621_ide_exit);
+
+MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
+MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/palm_bk3710.c b/drivers/ide/palm_bk3710.c
new file mode 100644
index 000000000..d1fe4c13e
--- /dev/null
+++ b/drivers/ide/palm_bk3710.c
@@ -0,0 +1,387 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Palmchip bk3710 IDE controller
+ *
+ * Copyright (C) 2006 Texas Instruments.
+ * Copyright (C) 2007 MontaVista Software, Inc., <source@mvista.com>
+ *
+ * ----------------------------------------------------------------------------
+ *
+ * ----------------------------------------------------------------------------
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/ide.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+/* Offset of the primary interface registers */
+#define IDE_PALM_ATA_PRI_REG_OFFSET 0x1F0
+
+/* Primary Control Offset */
+#define IDE_PALM_ATA_PRI_CTL_OFFSET 0x3F6
+
+#define BK3710_BMICP		0x00
+#define BK3710_BMISP		0x02
+#define BK3710_BMIDTP		0x04
+#define BK3710_IDETIMP		0x40
+#define BK3710_IDESTATUS	0x47
+#define BK3710_UDMACTL		0x48
+#define BK3710_MISCCTL		0x50
+#define BK3710_REGSTB		0x54
+#define BK3710_REGRCVR		0x58
+#define BK3710_DATSTB		0x5C
+#define BK3710_DATRCVR		0x60
+#define BK3710_DMASTB		0x64
+#define BK3710_DMARCVR		0x68
+#define BK3710_UDMASTB		0x6C
+#define BK3710_UDMATRP		0x70
+#define BK3710_UDMAENV		0x74
+#define BK3710_IORDYTMP		0x78
+
+static unsigned ideclk_period; /* in nanoseconds */
+
+struct palm_bk3710_udmatiming {
+	unsigned int rptime;	/* tRP -- Ready to pause time (nsec) */
+	unsigned int cycletime;	/* tCYCTYP2/2 -- avg Cycle Time (nsec) */
+				/* tENV is always a minimum of 20 nsec */
+};
+
+static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = {
+	{ 160, 240 / 2 },	/* UDMA Mode 0 */
+	{ 125, 160 / 2 },	/* UDMA Mode 1 */
+	{ 100, 120 / 2 },	/* UDMA Mode 2 */
+	{ 100,  90 / 2 },	/* UDMA Mode 3 */
+	{ 100,  60 / 2 },	/* UDMA Mode 4 */
+	{  85,  40 / 2 },	/* UDMA Mode 5 */
+};
+
+static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev,
+				    unsigned int mode)
+{
+	u8 tenv, trp, t0;
+	u32 val32;
+	u16 val16;
+
+	/* DMA Data Setup */
+	t0 = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].cycletime,
+			  ideclk_period) - 1;
+	tenv = DIV_ROUND_UP(20, ideclk_period) - 1;
+	trp = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].rptime,
+			   ideclk_period) - 1;
+
+	/* udmastb Ultra DMA Access Strobe Width */
+	val32 = readl(base + BK3710_UDMASTB) & (0xFF << (dev ? 0 : 8));
+	val32 |= (t0 << (dev ? 8 : 0));
+	writel(val32, base + BK3710_UDMASTB);
+
+	/* udmatrp Ultra DMA Ready to Pause Time */
+	val32 = readl(base + BK3710_UDMATRP) & (0xFF << (dev ? 0 : 8));
+	val32 |= (trp << (dev ? 8 : 0));
+	writel(val32, base + BK3710_UDMATRP);
+
+	/* udmaenv Ultra DMA envelop Time */
+	val32 = readl(base + BK3710_UDMAENV) & (0xFF << (dev ? 0 : 8));
+	val32 |= (tenv << (dev ? 8 : 0));
+	writel(val32, base + BK3710_UDMAENV);
+
+	/* Enable UDMA for Device */
+	val16 = readw(base + BK3710_UDMACTL) | (1 << dev);
+	writew(val16, base + BK3710_UDMACTL);
+}
+
+static void palm_bk3710_setdmamode(void __iomem *base, unsigned int dev,
+				   unsigned short min_cycle,
+				   unsigned int mode)
+{
+	u8 td, tkw, t0;
+	u32 val32;
+	u16 val16;
+	struct ide_timing *t;
+	int cycletime;
+
+	t = ide_timing_find_mode(mode);
+	cycletime = max_t(int, t->cycle, min_cycle);
+
+	/* DMA Data Setup */
+	t0 = DIV_ROUND_UP(cycletime, ideclk_period);
+	td = DIV_ROUND_UP(t->active, ideclk_period);
+	tkw = t0 - td - 1;
+	td -= 1;
+
+	val32 = readl(base + BK3710_DMASTB) & (0xFF << (dev ? 0 : 8));
+	val32 |= (td << (dev ? 8 : 0));
+	writel(val32, base + BK3710_DMASTB);
+
+	val32 = readl(base + BK3710_DMARCVR) & (0xFF << (dev ? 0 : 8));
+	val32 |= (tkw << (dev ? 8 : 0));
+	writel(val32, base + BK3710_DMARCVR);
+
+	/* Disable UDMA for Device */
+	val16 = readw(base + BK3710_UDMACTL) & ~(1 << dev);
+	writew(val16, base + BK3710_UDMACTL);
+}
+
+static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
+				   unsigned int dev, unsigned int cycletime,
+				   unsigned int mode)
+{
+	u8 t2, t2i, t0;
+	u32 val32;
+	struct ide_timing *t;
+
+	t = ide_timing_find_mode(XFER_PIO_0 + mode);
+
+	/* PIO Data Setup */
+	t0 = DIV_ROUND_UP(cycletime, ideclk_period);
+	t2 = DIV_ROUND_UP(t->active, ideclk_period);
+
+	t2i = t0 - t2 - 1;
+	t2 -= 1;
+
+	val32 = readl(base + BK3710_DATSTB) & (0xFF << (dev ? 0 : 8));
+	val32 |= (t2 << (dev ? 8 : 0));
+	writel(val32, base + BK3710_DATSTB);
+
+	val32 = readl(base + BK3710_DATRCVR) & (0xFF << (dev ? 0 : 8));
+	val32 |= (t2i << (dev ? 8 : 0));
+	writel(val32, base + BK3710_DATRCVR);
+
+	if (mate) {
+		u8 mode2 = mate->pio_mode - XFER_PIO_0;
+
+		if (mode2 < mode)
+			mode = mode2;
+	}
+
+	/* TASKFILE Setup */
+	t0 = DIV_ROUND_UP(t->cyc8b, ideclk_period);
+	t2 = DIV_ROUND_UP(t->act8b, ideclk_period);
+
+	t2i = t0 - t2 - 1;
+	t2 -= 1;
+
+	val32 = readl(base + BK3710_REGSTB) & (0xFF << (dev ? 0 : 8));
+	val32 |= (t2 << (dev ? 8 : 0));
+	writel(val32, base + BK3710_REGSTB);
+
+	val32 = readl(base + BK3710_REGRCVR) & (0xFF << (dev ? 0 : 8));
+	val32 |= (t2i << (dev ? 8 : 0));
+	writel(val32, base + BK3710_REGRCVR);
+}
+
+static void palm_bk3710_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	int is_slave = drive->dn & 1;
+	void __iomem *base = (void __iomem *)hwif->dma_base;
+	const u8 xferspeed = drive->dma_mode;
+
+	if (xferspeed >= XFER_UDMA_0) {
+		palm_bk3710_setudmamode(base, is_slave,
+					xferspeed - XFER_UDMA_0);
+	} else {
+		palm_bk3710_setdmamode(base, is_slave,
+				       drive->id[ATA_ID_EIDE_DMA_MIN],
+				       xferspeed);
+	}
+}
+
+static void palm_bk3710_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned int cycle_time;
+	int is_slave = drive->dn & 1;
+	ide_drive_t *mate;
+	void __iomem *base = (void __iomem *)hwif->dma_base;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	/*
+	 * Obtain the drive PIO data for tuning the Palm Chip registers
+	 */
+	cycle_time = ide_pio_cycle_time(drive, pio);
+	mate = ide_get_pair_dev(drive);
+	palm_bk3710_setpiomode(base, mate, is_slave, cycle_time, pio);
+}
+
+static void palm_bk3710_chipinit(void __iomem *base)
+{
+	/*
+	 * REVISIT:  the ATA reset signal needs to be managed through a
+	 * GPIO, which means it should come from platform_data.  Until
+	 * we get and use such information, we have to trust that things
+	 * have been reset before we get here.
+	 */
+
+	/*
+	 * Program the IDETIMP Register Value based on the following assumptions
+	 *
+	 * (ATA_IDETIMP_IDEEN		, ENABLE ) |
+	 * (ATA_IDETIMP_PREPOST1	, DISABLE) |
+	 * (ATA_IDETIMP_PREPOST0	, DISABLE) |
+	 *
+	 * DM6446 silicon rev 2.1 and earlier have no observed net benefit
+	 * from enabling prefetch/postwrite.
+	 */
+	writew(BIT(15), base + BK3710_IDETIMP);
+
+	/*
+	 * UDMACTL Ultra-ATA DMA Control
+	 * (ATA_UDMACTL_UDMAP1	, 0 ) |
+	 * (ATA_UDMACTL_UDMAP0	, 0 )
+	 *
+	 */
+	writew(0, base + BK3710_UDMACTL);
+
+	/*
+	 * MISCCTL Miscellaneous Conrol Register
+	 * (ATA_MISCCTL_HWNHLD1P	, 1 cycle)
+	 * (ATA_MISCCTL_HWNHLD0P	, 1 cycle)
+	 * (ATA_MISCCTL_TIMORIDE	, 1)
+	 */
+	writel(0x001, base + BK3710_MISCCTL);
+
+	/*
+	 * IORDYTMP IORDY Timer for Primary Register
+	 * (ATA_IORDYTMP_IORDYTMP     , 0xffff  )
+	 */
+	writel(0xFFFF, base + BK3710_IORDYTMP);
+
+	/*
+	 * Configure BMISP Register
+	 * (ATA_BMISP_DMAEN1	, DISABLE )	|
+	 * (ATA_BMISP_DMAEN0	, DISABLE )	|
+	 * (ATA_BMISP_IORDYINT	, CLEAR)	|
+	 * (ATA_BMISP_INTRSTAT	, CLEAR)	|
+	 * (ATA_BMISP_DMAERROR	, CLEAR)
+	 */
+	writew(0, base + BK3710_BMISP);
+
+	palm_bk3710_setpiomode(base, NULL, 0, 600, 0);
+	palm_bk3710_setpiomode(base, NULL, 1, 600, 0);
+}
+
+static u8 palm_bk3710_cable_detect(ide_hwif_t *hwif)
+{
+	return ATA_CBL_PATA80;
+}
+
+static int palm_bk3710_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
+
+	if (ide_allocate_dma_engine(hwif))
+		return -1;
+
+	hwif->dma_base = hwif->io_ports.data_addr - IDE_PALM_ATA_PRI_REG_OFFSET;
+
+	return 0;
+}
+
+static const struct ide_port_ops palm_bk3710_ports_ops = {
+	.set_pio_mode		= palm_bk3710_set_pio_mode,
+	.set_dma_mode		= palm_bk3710_set_dma_mode,
+	.cable_detect		= palm_bk3710_cable_detect,
+};
+
+static struct ide_port_info palm_bk3710_port_info __initdata = {
+	.init_dma		= palm_bk3710_init_dma,
+	.port_ops		= &palm_bk3710_ports_ops,
+	.dma_ops		= &sff_dma_ops,
+	.host_flags		= IDE_HFLAG_MMIO,
+	.pio_mask		= ATA_PIO4,
+	.mwdma_mask		= ATA_MWDMA2,
+	.chipset		= ide_palm3710,
+};
+
+static int __init palm_bk3710_probe(struct platform_device *pdev)
+{
+	struct clk *clk;
+	struct resource *mem, *irq;
+	void __iomem *base;
+	unsigned long rate, mem_size;
+	int i, rc;
+	struct ide_hw hw, *hws[] = { &hw };
+
+	clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk))
+		return -ENODEV;
+
+	clk_enable(clk);
+	rate = clk_get_rate(clk);
+	if (!rate)
+		return -EINVAL;
+
+	/* NOTE:  round *down* to meet minimum timings; we count in clocks */
+	ideclk_period = 1000000000UL / rate;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (mem == NULL) {
+		printk(KERN_ERR "failed to get memory region resource\n");
+		return -ENODEV;
+	}
+
+	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (irq == NULL) {
+		printk(KERN_ERR "failed to get IRQ resource\n");
+		return -ENODEV;
+	}
+
+	mem_size = resource_size(mem);
+	if (request_mem_region(mem->start, mem_size, "palm_bk3710") == NULL) {
+		printk(KERN_ERR "failed to request memory region\n");
+		return -EBUSY;
+	}
+
+	base = ioremap(mem->start, mem_size);
+	if (!base) {
+		printk(KERN_ERR "failed to map IO memory\n");
+		release_mem_region(mem->start, mem_size);
+		return -ENOMEM;
+	}
+
+	/* Configure the Palm Chip controller */
+	palm_bk3710_chipinit(base);
+
+	memset(&hw, 0, sizeof(hw));
+	for (i = 0; i < IDE_NR_PORTS - 2; i++)
+		hw.io_ports_array[i] = (unsigned long)
+				(base + IDE_PALM_ATA_PRI_REG_OFFSET + i);
+	hw.io_ports.ctl_addr = (unsigned long)
+			(base + IDE_PALM_ATA_PRI_CTL_OFFSET);
+	hw.irq = irq->start;
+	hw.dev = &pdev->dev;
+
+	palm_bk3710_port_info.udma_mask = rate < 100000000 ? ATA_UDMA4 :
+							     ATA_UDMA5;
+
+	/* Register the IDE interface with Linux */
+	rc = ide_host_add(&palm_bk3710_port_info, hws, 1, NULL);
+	if (rc)
+		goto out;
+
+	return 0;
+out:
+	printk(KERN_WARNING "Palm Chip BK3710 IDE Register Fail\n");
+	return rc;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:palm_bk3710");
+
+static struct platform_driver platform_bk_driver = {
+	.driver = {
+		.name = "palm_bk3710",
+	},
+};
+
+static int __init palm_bk3710_init(void)
+{
+	return platform_driver_probe(&platform_bk_driver, palm_bk3710_probe);
+}
+
+module_init(palm_bk3710_init);
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/pdc202xx_new.c b/drivers/ide/pdc202xx_new.c
new file mode 100644
index 000000000..4fcafb912
--- /dev/null
+++ b/drivers/ide/pdc202xx_new.c
@@ -0,0 +1,557 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Promise TX2/TX4/TX2000/133 IDE driver
+ *
+ *  Split from:
+ *  linux/drivers/ide/pdc202xx.c	Version 0.35	Mar. 30, 2002
+ *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2005-2007		MontaVista Software, Inc.
+ *  Portions Copyright (C) 1999 Promise Technology, Inc.
+ *  Author: Frank Tiernan (frankt@promise.com)
+ *  Released under terms of General Public License
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <linux/ktime.h>
+
+#include <asm/io.h>
+
+#ifdef CONFIG_PPC_PMAC
+#include <asm/prom.h>
+#endif
+
+#define DRV_NAME "pdc202xx_new"
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DBG(fmt, args...) printk("%s: " fmt, __func__, ## args)
+#else
+#define DBG(fmt, args...)
+#endif
+
+static u8 max_dma_rate(struct pci_dev *pdev)
+{
+	u8 mode;
+
+	switch(pdev->device) {
+		case PCI_DEVICE_ID_PROMISE_20277:
+		case PCI_DEVICE_ID_PROMISE_20276:
+		case PCI_DEVICE_ID_PROMISE_20275:
+		case PCI_DEVICE_ID_PROMISE_20271:
+		case PCI_DEVICE_ID_PROMISE_20269:
+			mode = 4;
+			break;
+		case PCI_DEVICE_ID_PROMISE_20270:
+		case PCI_DEVICE_ID_PROMISE_20268:
+			mode = 3;
+			break;
+		default:
+			return 0;
+	}
+
+	return mode;
+}
+
+/**
+ * get_indexed_reg - Get indexed register
+ * @hwif: for the port address
+ * @index: index of the indexed register
+ */
+static u8 get_indexed_reg(ide_hwif_t *hwif, u8 index)
+{
+	u8 value;
+
+	outb(index, hwif->dma_base + 1);
+	value = inb(hwif->dma_base + 3);
+
+	DBG("index[%02X] value[%02X]\n", index, value);
+	return value;
+}
+
+/**
+ * set_indexed_reg - Set indexed register
+ * @hwif: for the port address
+ * @index: index of the indexed register
+ */
+static void set_indexed_reg(ide_hwif_t *hwif, u8 index, u8 value)
+{
+	outb(index, hwif->dma_base + 1);
+	outb(value, hwif->dma_base + 3);
+	DBG("index[%02X] value[%02X]\n", index, value);
+}
+
+/*
+ * ATA Timing Tables based on 133 MHz PLL output clock.
+ *
+ * If the PLL outputs 100 MHz clock, the ASIC hardware will set
+ * the timing registers automatically when "set features" command is
+ * issued to the device. However, if the PLL output clock is 133 MHz,
+ * the following tables must be used.
+ */
+static struct pio_timing {
+	u8 reg0c, reg0d, reg13;
+} pio_timings [] = {
+	{ 0xfb, 0x2b, 0xac },	/* PIO mode 0, IORDY off, Prefetch off */
+	{ 0x46, 0x29, 0xa4 },	/* PIO mode 1, IORDY off, Prefetch off */
+	{ 0x23, 0x26, 0x64 },	/* PIO mode 2, IORDY off, Prefetch off */
+	{ 0x27, 0x0d, 0x35 },	/* PIO mode 3, IORDY on,  Prefetch off */
+	{ 0x23, 0x09, 0x25 },	/* PIO mode 4, IORDY on,  Prefetch off */
+};
+
+static struct mwdma_timing {
+	u8 reg0e, reg0f;
+} mwdma_timings [] = {
+	{ 0xdf, 0x5f }, 	/* MWDMA mode 0 */
+	{ 0x6b, 0x27 }, 	/* MWDMA mode 1 */
+	{ 0x69, 0x25 }, 	/* MWDMA mode 2 */
+};
+
+static struct udma_timing {
+	u8 reg10, reg11, reg12;
+} udma_timings [] = {
+	{ 0x4a, 0x0f, 0xd5 },	/* UDMA mode 0 */
+	{ 0x3a, 0x0a, 0xd0 },	/* UDMA mode 1 */
+	{ 0x2a, 0x07, 0xcd },	/* UDMA mode 2 */
+	{ 0x1a, 0x05, 0xcd },	/* UDMA mode 3 */
+	{ 0x1a, 0x03, 0xcd },	/* UDMA mode 4 */
+	{ 0x1a, 0x02, 0xcb },	/* UDMA mode 5 */
+	{ 0x1a, 0x01, 0xcb },	/* UDMA mode 6 */
+};
+
+static void pdcnew_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 adj			= (drive->dn & 1) ? 0x08 : 0x00;
+	const u8 speed		= drive->dma_mode;
+
+	/*
+	 * IDE core issues SETFEATURES_XFER to the drive first (thanks to
+	 * IDE_HFLAG_POST_SET_MODE in ->host_flags).  PDC202xx hardware will
+	 * automatically set the timing registers based on 100 MHz PLL output.
+	 *
+	 * As we set up the PLL to output 133 MHz for UltraDMA/133 capable
+	 * chips, we must override the default register settings...
+	 */
+	if (max_dma_rate(dev) == 4) {
+		u8 mode = speed & 0x07;
+
+		if (speed >= XFER_UDMA_0) {
+			set_indexed_reg(hwif, 0x10 + adj,
+					udma_timings[mode].reg10);
+			set_indexed_reg(hwif, 0x11 + adj,
+					udma_timings[mode].reg11);
+			set_indexed_reg(hwif, 0x12 + adj,
+					udma_timings[mode].reg12);
+		} else {
+			set_indexed_reg(hwif, 0x0e + adj,
+					mwdma_timings[mode].reg0e);
+			set_indexed_reg(hwif, 0x0f + adj,
+					mwdma_timings[mode].reg0f);
+		}
+	} else if (speed == XFER_UDMA_2) {
+		/* Set tHOLD bit to 0 if using UDMA mode 2 */
+		u8 tmp = get_indexed_reg(hwif, 0x10 + adj);
+
+		set_indexed_reg(hwif, 0x10 + adj, tmp & 0x7f);
+ 	}
+}
+
+static void pdcnew_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 adj = (drive->dn & 1) ? 0x08 : 0x00;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	if (max_dma_rate(dev) == 4) {
+		set_indexed_reg(hwif, 0x0c + adj, pio_timings[pio].reg0c);
+		set_indexed_reg(hwif, 0x0d + adj, pio_timings[pio].reg0d);
+		set_indexed_reg(hwif, 0x13 + adj, pio_timings[pio].reg13);
+	}
+}
+
+static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
+{
+	if (get_indexed_reg(hwif, 0x0b) & 0x04)
+		return ATA_CBL_PATA40;
+	else
+		return ATA_CBL_PATA80;
+}
+
+static void pdcnew_reset(ide_drive_t *drive)
+{
+	/*
+	 * Deleted this because it is redundant from the caller.
+	 */
+	printk(KERN_WARNING "pdc202xx_new: %s channel reset.\n",
+		drive->hwif->channel ? "Secondary" : "Primary");
+}
+
+/**
+ * read_counter - Read the byte count registers
+ * @dma_base: for the port address
+ */
+static long read_counter(u32 dma_base)
+{
+	u32  pri_dma_base = dma_base, sec_dma_base = dma_base + 0x08;
+	u8   cnt0, cnt1, cnt2, cnt3;
+	long count = 0, last;
+	int  retry = 3;
+
+	do {
+		last = count;
+
+		/* Read the current count */
+		outb(0x20, pri_dma_base + 0x01);
+		cnt0 = inb(pri_dma_base + 0x03);
+		outb(0x21, pri_dma_base + 0x01);
+		cnt1 = inb(pri_dma_base + 0x03);
+		outb(0x20, sec_dma_base + 0x01);
+		cnt2 = inb(sec_dma_base + 0x03);
+		outb(0x21, sec_dma_base + 0x01);
+		cnt3 = inb(sec_dma_base + 0x03);
+
+		count = (cnt3 << 23) | (cnt2 << 15) | (cnt1 << 8) | cnt0;
+
+		/*
+		 * The 30-bit decrementing counter is read in 4 pieces.
+		 * Incorrect value may be read when the most significant bytes
+		 * are changing...
+		 */
+	} while (retry-- && (((last ^ count) & 0x3fff8000) || last < count));
+
+	DBG("cnt0[%02X] cnt1[%02X] cnt2[%02X] cnt3[%02X]\n",
+		  cnt0, cnt1, cnt2, cnt3);
+
+	return count;
+}
+
+/**
+ * detect_pll_input_clock - Detect the PLL input clock in Hz.
+ * @dma_base: for the port address
+ * E.g. 16949000 on 33 MHz PCI bus, i.e. half of the PCI clock.
+ */
+static long detect_pll_input_clock(unsigned long dma_base)
+{
+	ktime_t start_time, end_time;
+	long start_count, end_count;
+	long pll_input, usec_elapsed;
+	u8 scr1;
+
+	start_count = read_counter(dma_base);
+	start_time = ktime_get();
+
+	/* Start the test mode */
+	outb(0x01, dma_base + 0x01);
+	scr1 = inb(dma_base + 0x03);
+	DBG("scr1[%02X]\n", scr1);
+	outb(scr1 | 0x40, dma_base + 0x03);
+
+	/* Let the counter run for 10 ms. */
+	mdelay(10);
+
+	end_count = read_counter(dma_base);
+	end_time = ktime_get();
+
+	/* Stop the test mode */
+	outb(0x01, dma_base + 0x01);
+	scr1 = inb(dma_base + 0x03);
+	DBG("scr1[%02X]\n", scr1);
+	outb(scr1 & ~0x40, dma_base + 0x03);
+
+	/*
+	 * Calculate the input clock in Hz
+	 * (the clock counter is 30 bit wide and counts down)
+	 */
+	usec_elapsed = ktime_us_delta(end_time, start_time);
+	pll_input = ((start_count - end_count) & 0x3fffffff) / 10 *
+		(10000000 / usec_elapsed);
+
+	DBG("start[%ld] end[%ld]\n", start_count, end_count);
+
+	return pll_input;
+}
+
+#ifdef CONFIG_PPC_PMAC
+static void apple_kiwi_init(struct pci_dev *pdev)
+{
+	struct device_node *np = pci_device_to_OF_node(pdev);
+	u8 conf;
+
+	if (np == NULL || !of_device_is_compatible(np, "kiwi-root"))
+		return;
+
+	if (pdev->revision >= 0x03) {
+		/* Setup chip magic config stuff (from darwin) */
+		pci_read_config_byte (pdev, 0x40, &conf);
+		pci_write_config_byte(pdev, 0x40, (conf | 0x01));
+	}
+}
+#endif /* CONFIG_PPC_PMAC */
+
+static int init_chipset_pdcnew(struct pci_dev *dev)
+{
+	const char *name = DRV_NAME;
+	unsigned long dma_base = pci_resource_start(dev, 4);
+	unsigned long sec_dma_base = dma_base + 0x08;
+	long pll_input, pll_output, ratio;
+	int f, r;
+	u8 pll_ctl0, pll_ctl1;
+
+	if (dma_base == 0)
+		return -EFAULT;
+
+#ifdef CONFIG_PPC_PMAC
+	apple_kiwi_init(dev);
+#endif
+
+	/* Calculate the required PLL output frequency */
+	switch(max_dma_rate(dev)) {
+		case 4: /* it's 133 MHz for Ultra133 chips */
+			pll_output = 133333333;
+			break;
+		case 3: /* and  100 MHz for Ultra100 chips */
+		default:
+			pll_output = 100000000;
+			break;
+	}
+
+	/*
+	 * Detect PLL input clock.
+	 * On some systems, where PCI bus is running at non-standard clock rate
+	 * (e.g. 25 or 40 MHz), we have to adjust the cycle time.
+	 * PDC20268 and newer chips employ PLL circuit to help correct timing
+	 * registers setting.
+	 */
+	pll_input = detect_pll_input_clock(dma_base);
+	printk(KERN_INFO "%s %s: PLL input clock is %ld kHz\n",
+		name, pci_name(dev), pll_input / 1000);
+
+	/* Sanity check */
+	if (unlikely(pll_input < 5000000L || pll_input > 70000000L)) {
+		printk(KERN_ERR "%s %s: Bad PLL input clock %ld Hz, giving up!"
+			"\n", name, pci_name(dev), pll_input);
+		goto out;
+	}
+
+#ifdef DEBUG
+	DBG("pll_output is %ld Hz\n", pll_output);
+
+	/* Show the current clock value of PLL control register
+	 * (maybe already configured by the BIOS)
+	 */
+	outb(0x02, sec_dma_base + 0x01);
+	pll_ctl0 = inb(sec_dma_base + 0x03);
+	outb(0x03, sec_dma_base + 0x01);
+	pll_ctl1 = inb(sec_dma_base + 0x03);
+
+	DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
+#endif
+
+	/*
+	 * Calculate the ratio of F, R and NO
+	 * POUT = (F + 2) / (( R + 2) * NO)
+	 */
+	ratio = pll_output / (pll_input / 1000);
+	if (ratio < 8600L) { /* 8.6x */
+		/* Using NO = 0x01, R = 0x0d */
+		r = 0x0d;
+	} else if (ratio < 12900L) { /* 12.9x */
+		/* Using NO = 0x01, R = 0x08 */
+		r = 0x08;
+	} else if (ratio < 16100L) { /* 16.1x */
+		/* Using NO = 0x01, R = 0x06 */
+		r = 0x06;
+	} else if (ratio < 64000L) { /* 64x */
+		r = 0x00;
+	} else {
+		/* Invalid ratio */
+		printk(KERN_ERR "%s %s: Bad ratio %ld, giving up!\n",
+			name, pci_name(dev), ratio);
+		goto out;
+	}
+
+	f = (ratio * (r + 2)) / 1000 - 2;
+
+	DBG("F[%d] R[%d] ratio*1000[%ld]\n", f, r, ratio);
+
+	if (unlikely(f < 0 || f > 127)) {
+		/* Invalid F */
+		printk(KERN_ERR "%s %s: F[%d] invalid!\n",
+			name, pci_name(dev), f);
+		goto out;
+	}
+
+	pll_ctl0 = (u8) f;
+	pll_ctl1 = (u8) r;
+
+	DBG("Writing pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
+
+	outb(0x02,     sec_dma_base + 0x01);
+	outb(pll_ctl0, sec_dma_base + 0x03);
+	outb(0x03,     sec_dma_base + 0x01);
+	outb(pll_ctl1, sec_dma_base + 0x03);
+
+	/* Wait the PLL circuit to be stable */
+	mdelay(30);
+
+#ifdef DEBUG
+	/*
+	 *  Show the current clock value of PLL control register
+	 */
+	outb(0x02, sec_dma_base + 0x01);
+	pll_ctl0 = inb(sec_dma_base + 0x03);
+	outb(0x03, sec_dma_base + 0x01);
+	pll_ctl1 = inb(sec_dma_base + 0x03);
+
+	DBG("pll_ctl[%02X][%02X]\n", pll_ctl0, pll_ctl1);
+#endif
+
+ out:
+	return 0;
+}
+
+static struct pci_dev *pdc20270_get_dev2(struct pci_dev *dev)
+{
+	struct pci_dev *dev2;
+
+	dev2 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn) + 1,
+						PCI_FUNC(dev->devfn)));
+
+	if (dev2 &&
+	    dev2->vendor == dev->vendor &&
+	    dev2->device == dev->device) {
+
+		if (dev2->irq != dev->irq) {
+			dev2->irq = dev->irq;
+			printk(KERN_INFO DRV_NAME " %s: PCI config space "
+				"interrupt fixed\n", pci_name(dev));
+		}
+
+		return dev2;
+	}
+
+	return NULL;
+}
+
+static const struct ide_port_ops pdcnew_port_ops = {
+	.set_pio_mode		= pdcnew_set_pio_mode,
+	.set_dma_mode		= pdcnew_set_dma_mode,
+	.resetproc		= pdcnew_reset,
+	.cable_detect		= pdcnew_cable_detect,
+};
+
+#define DECLARE_PDCNEW_DEV(udma) \
+	{ \
+		.name		= DRV_NAME, \
+		.init_chipset	= init_chipset_pdcnew, \
+		.port_ops	= &pdcnew_port_ops, \
+		.host_flags	= IDE_HFLAG_POST_SET_MODE | \
+				  IDE_HFLAG_ERROR_STOPS_FIFO | \
+				  IDE_HFLAG_OFF_BOARD, \
+		.pio_mask	= ATA_PIO4, \
+		.mwdma_mask	= ATA_MWDMA2, \
+		.udma_mask	= udma, \
+	}
+
+static const struct ide_port_info pdcnew_chipsets[] = {
+	/* 0: PDC202{68,70} */		DECLARE_PDCNEW_DEV(ATA_UDMA5),
+	/* 1: PDC202{69,71,75,76,77} */	DECLARE_PDCNEW_DEV(ATA_UDMA6),
+};
+
+/**
+ *	pdc202new_init_one	-	called when a pdc202xx is found
+ *	@dev: the pdc202new device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+ 
+static int pdc202new_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	const struct ide_port_info *d = &pdcnew_chipsets[id->driver_data];
+	struct pci_dev *bridge = dev->bus->self;
+
+	if (dev->device == PCI_DEVICE_ID_PROMISE_20270 && bridge &&
+	    bridge->vendor == PCI_VENDOR_ID_DEC &&
+	    bridge->device == PCI_DEVICE_ID_DEC_21150) {
+		struct pci_dev *dev2;
+
+		if (PCI_SLOT(dev->devfn) & 2)
+			return -ENODEV;
+
+		dev2 = pdc20270_get_dev2(dev);
+
+		if (dev2) {
+			int ret = ide_pci_init_two(dev, dev2, d, NULL);
+			if (ret < 0)
+				pci_dev_put(dev2);
+			return ret;
+		}
+	}
+
+	if (dev->device == PCI_DEVICE_ID_PROMISE_20276 && bridge &&
+	    bridge->vendor == PCI_VENDOR_ID_INTEL &&
+	    (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
+	     bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
+		printk(KERN_INFO DRV_NAME " %s: attached to I2O RAID controller,"
+			" skipping\n", pci_name(dev));
+		return -ENODEV;
+	}
+
+	return ide_pci_init_one(dev, d, NULL);
+}
+
+static void pdc202new_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
+
+	ide_pci_remove(dev);
+	pci_dev_put(dev2);
+}
+
+static const struct pci_device_id pdc202new_pci_tbl[] = {
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), 0 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), 0 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), 1 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, pdc202new_pci_tbl);
+
+static struct pci_driver pdc202new_pci_driver = {
+	.name		= "Promise_IDE",
+	.id_table	= pdc202new_pci_tbl,
+	.probe		= pdc202new_init_one,
+	.remove		= pdc202new_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init pdc202new_ide_init(void)
+{
+	return ide_pci_register_driver(&pdc202new_pci_driver);
+}
+
+static void __exit pdc202new_ide_exit(void)
+{
+	pci_unregister_driver(&pdc202new_pci_driver);
+}
+
+module_init(pdc202new_ide_init);
+module_exit(pdc202new_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
+MODULE_DESCRIPTION("PCI driver module for Promise PDC20268 and higher");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
new file mode 100644
index 000000000..5248ac064
--- /dev/null
+++ b/drivers/ide/pdc202xx_old.c
@@ -0,0 +1,362 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2006-2007, 2009	MontaVista Software, Inc.
+ *  Copyright (C) 2007-2010		Bartlomiej Zolnierkiewicz
+ *
+ *  Portions Copyright (C) 1999 Promise Technology, Inc.
+ *  Author: Frank Tiernan (frankt@promise.com)
+ *  Released under terms of General Public License
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/blkdev.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "pdc202xx_old"
+
+static void pdc202xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 drive_pci		= 0x60 + (drive->dn << 2);
+	const u8 speed		= drive->dma_mode;
+
+	u8			AP = 0, BP = 0, CP = 0;
+	u8			TA = 0, TB = 0, TC = 0;
+
+	pci_read_config_byte(dev, drive_pci,     &AP);
+	pci_read_config_byte(dev, drive_pci + 1, &BP);
+	pci_read_config_byte(dev, drive_pci + 2, &CP);
+
+	switch(speed) {
+		case XFER_UDMA_5:
+		case XFER_UDMA_4:	TB = 0x20; TC = 0x01; break;
+		case XFER_UDMA_2:	TB = 0x20; TC = 0x01; break;
+		case XFER_UDMA_3:
+		case XFER_UDMA_1:	TB = 0x40; TC = 0x02; break;
+		case XFER_UDMA_0:
+		case XFER_MW_DMA_2:	TB = 0x60; TC = 0x03; break;
+		case XFER_MW_DMA_1:	TB = 0x60; TC = 0x04; break;
+		case XFER_MW_DMA_0:	TB = 0xE0; TC = 0x0F; break;
+		case XFER_PIO_4:	TA = 0x01; TB = 0x04; break;
+		case XFER_PIO_3:	TA = 0x02; TB = 0x06; break;
+		case XFER_PIO_2:	TA = 0x03; TB = 0x08; break;
+		case XFER_PIO_1:	TA = 0x05; TB = 0x0C; break;
+		case XFER_PIO_0:
+		default:		TA = 0x09; TB = 0x13; break;
+	}
+
+	if (speed < XFER_SW_DMA_0) {
+		/*
+		 * preserve SYNC_INT / ERDDY_EN bits while clearing
+		 * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
+		 */
+		AP &= ~0x3f;
+		if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
+			AP |= 0x20;	/* set IORDY_EN bit */
+		if (drive->media == ide_disk)
+			AP |= 0x10;	/* set Prefetch_EN bit */
+		/* clear PB[4:0] bits of register B */
+		BP &= ~0x1f;
+		pci_write_config_byte(dev, drive_pci,     AP | TA);
+		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
+	} else {
+		/* clear MB[2:0] bits of register B */
+		BP &= ~0xe0;
+		/* clear MC[3:0] bits of register C */
+		CP &= ~0x0f;
+		pci_write_config_byte(dev, drive_pci + 1, BP | TB);
+		pci_write_config_byte(dev, drive_pci + 2, CP | TC);
+	}
+}
+
+static void pdc202xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	pdc202xx_set_mode(hwif, drive);
+}
+
+static int pdc202xx_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long high_16	= pci_resource_start(dev, 4);
+	u8 sc1d			= inb(high_16 + 0x1d);
+
+	if (hwif->channel) {
+		/*
+		 * bit 7: error, bit 6: interrupting,
+		 * bit 5: FIFO full, bit 4: FIFO empty
+		 */
+		return (sc1d & 0x40) ? 1 : 0;
+	} else	{
+		/*
+		 * bit 3: error, bit 2: interrupting,
+		 * bit 1: FIFO full, bit 0: FIFO empty
+		 */
+		return (sc1d & 0x04) ? 1 : 0;
+	}
+}
+
+static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);
+
+	pci_read_config_word(dev, 0x50, &CIS);
+
+	return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+/*
+ * Set the control register to use the 66MHz system
+ * clock for UDMA 3/4/5 mode operation when necessary.
+ *
+ * FIXME: this register is shared by both channels, some locking is needed
+ *
+ * It may also be possible to leave the 66MHz clock on
+ * and readjust the timing parameters.
+ */
+static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
+{
+	unsigned long clock_reg = hwif->extra_base + 0x01;
+	u8 clock = inb(clock_reg);
+
+	outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
+}
+
+static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
+{
+	unsigned long clock_reg = hwif->extra_base + 0x01;
+	u8 clock = inb(clock_reg);
+
+	outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
+}
+
+static void pdc2026x_init_hwif(ide_hwif_t *hwif)
+{
+	pdc_old_disable_66MHz_clock(hwif);
+}
+
+static void pdc202xx_dma_start(ide_drive_t *drive)
+{
+	if (drive->current_speed > XFER_UDMA_2)
+		pdc_old_enable_66MHz_clock(drive->hwif);
+	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
+		ide_hwif_t *hwif	= drive->hwif;
+		struct request *rq	= hwif->rq;
+		unsigned long high_16	= hwif->extra_base - 16;
+		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
+		u32 word_count	= 0;
+		u8 clock = inb(high_16 + 0x11);
+
+		outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
+		word_count = (blk_rq_sectors(rq) << 8);
+		word_count = (rq_data_dir(rq) == READ) ?
+					word_count | 0x05000000 :
+					word_count | 0x06000000;
+		outl(word_count, atapi_reg);
+	}
+	ide_dma_start(drive);
+}
+
+static int pdc202xx_dma_end(ide_drive_t *drive)
+{
+	if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
+		ide_hwif_t *hwif	= drive->hwif;
+		unsigned long high_16	= hwif->extra_base - 16;
+		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
+		u8 clock		= 0;
+
+		outl(0, atapi_reg); /* zero out extra */
+		clock = inb(high_16 + 0x11);
+		outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
+	}
+	if (drive->current_speed > XFER_UDMA_2)
+		pdc_old_disable_66MHz_clock(drive->hwif);
+	return ide_dma_end(drive);
+}
+
+static int init_chipset_pdc202xx(struct pci_dev *dev)
+{
+	unsigned long dmabase = pci_resource_start(dev, 4);
+	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;
+
+	if (dmabase == 0)
+		goto out;
+
+	udma_speed_flag	= inb(dmabase | 0x1f);
+	primary_mode	= inb(dmabase | 0x1a);
+	secondary_mode	= inb(dmabase | 0x1b);
+	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
+		"Primary %s Mode " \
+		"Secondary %s Mode.\n", pci_name(dev),
+		(udma_speed_flag & 1) ? "EN" : "DIS",
+		(primary_mode & 1) ? "MASTER" : "PCI",
+		(secondary_mode & 1) ? "MASTER" : "PCI" );
+
+	if (!(udma_speed_flag & 1)) {
+		printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
+			pci_name(dev), udma_speed_flag,
+			(udma_speed_flag|1));
+		outb(udma_speed_flag | 1, dmabase | 0x1f);
+		printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
+	}
+out:
+	return 0;
+}
+
+static void pdc202ata4_fixup_irq(struct pci_dev *dev, const char *name)
+{
+	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
+		u8 irq = 0, irq2 = 0;
+		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
+		/* 0xbc */
+		pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
+		if (irq != irq2) {
+			pci_write_config_byte(dev,
+				(PCI_INTERRUPT_LINE)|0x80, irq);     /* 0xbc */
+			printk(KERN_INFO "%s %s: PCI config space interrupt "
+				"mirror fixed\n", name, pci_name(dev));
+		}
+	}
+}
+
+#define IDE_HFLAGS_PDC202XX \
+	(IDE_HFLAG_ERROR_STOPS_FIFO | \
+	 IDE_HFLAG_OFF_BOARD)
+
+static const struct ide_port_ops pdc20246_port_ops = {
+	.set_pio_mode		= pdc202xx_set_pio_mode,
+	.set_dma_mode		= pdc202xx_set_mode,
+	.test_irq		= pdc202xx_test_irq,
+};
+
+static const struct ide_port_ops pdc2026x_port_ops = {
+	.set_pio_mode		= pdc202xx_set_pio_mode,
+	.set_dma_mode		= pdc202xx_set_mode,
+	.test_irq		= pdc202xx_test_irq,
+	.cable_detect		= pdc2026x_cable_detect,
+};
+
+static const struct ide_dma_ops pdc2026x_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= pdc202xx_dma_start,
+	.dma_end		= pdc202xx_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+#define DECLARE_PDC2026X_DEV(udma, sectors) \
+	{ \
+		.name		= DRV_NAME, \
+		.init_chipset	= init_chipset_pdc202xx, \
+		.init_hwif	= pdc2026x_init_hwif, \
+		.port_ops	= &pdc2026x_port_ops, \
+		.dma_ops	= &pdc2026x_dma_ops, \
+		.host_flags	= IDE_HFLAGS_PDC202XX, \
+		.pio_mask	= ATA_PIO4, \
+		.mwdma_mask	= ATA_MWDMA2, \
+		.udma_mask	= udma, \
+		.max_sectors	= sectors, \
+	}
+
+static const struct ide_port_info pdc202xx_chipsets[] = {
+	{	/* 0: PDC20246 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_pdc202xx,
+		.port_ops	= &pdc20246_port_ops,
+		.dma_ops	= &sff_dma_ops,
+		.host_flags	= IDE_HFLAGS_PDC202XX,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA2,
+	},
+
+	/* 1: PDC2026{2,3} */
+	DECLARE_PDC2026X_DEV(ATA_UDMA4, 0),
+	/* 2: PDC2026{5,7}: UDMA5, limit LBA48 requests to 256 sectors */
+	DECLARE_PDC2026X_DEV(ATA_UDMA5, 256),
+};
+
+/**
+ *	pdc202xx_init_one	-	called when a PDC202xx is found
+ *	@dev: the pdc202xx device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+ 
+static int pdc202xx_init_one(struct pci_dev *dev,
+			     const struct pci_device_id *id)
+{
+	const struct ide_port_info *d;
+	u8 idx = id->driver_data;
+
+	d = &pdc202xx_chipsets[idx];
+
+	if (idx < 2)
+		pdc202ata4_fixup_irq(dev, d->name);
+
+	if (dev->vendor == PCI_DEVICE_ID_PROMISE_20265) {
+		struct pci_dev *bridge = dev->bus->self;
+
+		if (bridge &&
+		    bridge->vendor == PCI_VENDOR_ID_INTEL &&
+		    (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
+		     bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
+			printk(KERN_INFO DRV_NAME " %s: skipping Promise "
+				"PDC20265 attached to I2O RAID controller\n",
+				pci_name(dev));
+			return -ENODEV;
+		}
+	}
+
+	return ide_pci_init_one(dev, d, NULL);
+}
+
+static const struct pci_device_id pdc202xx_pci_tbl[] = {
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
+	{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);
+
+static struct pci_driver pdc202xx_pci_driver = {
+	.name		= "Promise_Old_IDE",
+	.id_table	= pdc202xx_pci_tbl,
+	.probe		= pdc202xx_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init pdc202xx_ide_init(void)
+{
+	return ide_pci_register_driver(&pdc202xx_pci_driver);
+}
+
+static void __exit pdc202xx_ide_exit(void)
+{
+	pci_unregister_driver(&pdc202xx_pci_driver);
+}
+
+module_init(pdc202xx_ide_init);
+module_exit(pdc202xx_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/piix.c b/drivers/ide/piix.c
new file mode 100644
index 000000000..a671cead6
--- /dev/null
+++ b/drivers/ide/piix.c
@@ -0,0 +1,476 @@
+/*
+ *  Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
+ *  Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2003 Red Hat
+ *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ * Documentation:
+ *
+ *	Publicly available from Intel web site. Errata documentation
+ * is also publicly available. As an aide to anyone hacking on this
+ * driver the list of errata that are relevant is below.going back to
+ * PIIX4. Older device documentation is now a bit tricky to find.
+ *
+ * Errata of note:
+ *
+ * Unfixable
+ *	PIIX4    errata #9	- Only on ultra obscure hw
+ *	ICH3	 errata #13     - Not observed to affect real hw
+ *				  by Intel
+ *
+ * Things we must deal with
+ *	PIIX4	errata #10	- BM IDE hang with non UDMA
+ *				  (must stop/start dma to recover)
+ *	440MX   errata #15	- As PIIX4 errata #10
+ *	PIIX4	errata #15	- Must not read control registers
+ * 				  during a PIO transfer
+ *	440MX   errata #13	- As PIIX4 errata #15
+ *	ICH2	errata #21	- DMA mode 0 doesn't work right
+ *	ICH0/1  errata #55	- As ICH2 errata #21
+ *	ICH2	spec c #9	- Extra operations needed to handle
+ *				  drive hotswap [NOT YET SUPPORTED]
+ *	ICH2    spec c #20	- IDE PRD must not cross a 64K boundary
+ *				  and must be dword aligned
+ *	ICH2    spec c #24	- UDMA mode 4,5 t85/86 should be 6ns not 3.3
+ *
+ * Should have been BIOS fixed:
+ *	450NX:	errata #19	- DMA hangs on old 450NX
+ *	450NX:  errata #20	- DMA hangs on old 450NX
+ *	450NX:  errata #25	- Corruption with DMA on old 450NX
+ *	ICH3    errata #15      - IDE deadlock under high load
+ *				  (BIOS must set dev 31 fn 0 bit 23)
+ *	ICH3	errata #18	- Don't use native mode
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "piix"
+
+static int no_piix_dma;
+
+/**
+ *	piix_set_pio_mode	-	set host controller for PIO mode
+ *	@port: port
+ *	@drive: drive
+ *
+ *	Set the interface PIO mode based upon the settings done by AMI BIOS.
+ */
+
+static void piix_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int is_slave		= drive->dn & 1;
+	int master_port		= hwif->channel ? 0x42 : 0x40;
+	int slave_port		= 0x44;
+	unsigned long flags;
+	u16 master_data;
+	u8 slave_data;
+	static DEFINE_SPINLOCK(tune_lock);
+	int control = 0;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+				     /* ISP  RTC */
+	static const u8 timings[][2]= {
+					{ 0, 0 },
+					{ 0, 0 },
+					{ 1, 0 },
+					{ 2, 1 },
+					{ 2, 3 }, };
+
+	/*
+	 * Master vs slave is synchronized above us but the slave register is
+	 * shared by the two hwifs so the corner case of two slave timeouts in
+	 * parallel must be locked.
+	 */
+	spin_lock_irqsave(&tune_lock, flags);
+	pci_read_config_word(dev, master_port, &master_data);
+
+	if (pio > 1)
+		control |= 1;	/* Programmable timing on */
+	if (drive->media == ide_disk)
+		control |= 4;	/* Prefetch, post write */
+	if (ide_pio_need_iordy(drive, pio))
+		control |= 2;	/* IORDY */
+	if (is_slave) {
+		master_data |=  0x4000;
+		master_data &= ~0x0070;
+		if (pio > 1) {
+			/* Set PPE, IE and TIME */
+			master_data |= control << 4;
+		}
+		pci_read_config_byte(dev, slave_port, &slave_data);
+		slave_data &= hwif->channel ? 0x0f : 0xf0;
+		slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
+			       (hwif->channel ? 4 : 0);
+	} else {
+		master_data &= ~0x3307;
+		if (pio > 1) {
+			/* enable PPE, IE and TIME */
+			master_data |= control;
+		}
+		master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
+	}
+	pci_write_config_word(dev, master_port, master_data);
+	if (is_slave)
+		pci_write_config_byte(dev, slave_port, slave_data);
+	spin_unlock_irqrestore(&tune_lock, flags);
+}
+
+/**
+ *	piix_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Set a PIIX host controller to the desired DMA mode.  This involves
+ *	programming the right timing data into the PCI configuration space.
+ */
+
+static void piix_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 maslave		= hwif->channel ? 0x42 : 0x40;
+	int a_speed		= 3 << (drive->dn * 4);
+	int u_flag		= 1 << drive->dn;
+	int v_flag		= 0x01 << drive->dn;
+	int w_flag		= 0x10 << drive->dn;
+	int u_speed		= 0;
+	int			sitre;
+	u16			reg4042, reg4a;
+	u8			reg48, reg54, reg55;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_word(dev, maslave, &reg4042);
+	sitre = (reg4042 & 0x4000) ? 1 : 0;
+	pci_read_config_byte(dev, 0x48, &reg48);
+	pci_read_config_word(dev, 0x4a, &reg4a);
+	pci_read_config_byte(dev, 0x54, &reg54);
+	pci_read_config_byte(dev, 0x55, &reg55);
+
+	if (speed >= XFER_UDMA_0) {
+		u8 udma = speed - XFER_UDMA_0;
+
+		u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);
+
+		if (!(reg48 & u_flag))
+			pci_write_config_byte(dev, 0x48, reg48 | u_flag);
+		if (speed == XFER_UDMA_5) {
+			pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
+		} else {
+			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+		}
+		if ((reg4a & a_speed) != u_speed)
+			pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed);
+		if (speed > XFER_UDMA_2) {
+			if (!(reg54 & v_flag))
+				pci_write_config_byte(dev, 0x54, reg54 | v_flag);
+		} else
+			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+	} else {
+		const u8 mwdma_to_pio[] = { 0, 3, 4 };
+
+		if (reg48 & u_flag)
+			pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
+		if (reg4a & a_speed)
+			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+		if (reg54 & v_flag)
+			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
+		if (reg55 & w_flag)
+			pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
+
+		if (speed >= XFER_MW_DMA_0)
+			drive->pio_mode =
+				mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
+		else
+			drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
+
+		piix_set_pio_mode(hwif, drive);
+	}
+}
+
+/**
+ *	init_chipset_ich	-	set up the ICH chipset
+ *	@dev: PCI device to set up
+ *
+ *	Initialize the PCI device as required.  For the ICH this turns
+ *	out to be nice and simple.
+ */
+
+static int init_chipset_ich(struct pci_dev *dev)
+{
+	u32 extra = 0;
+
+	pci_read_config_dword(dev, 0x54, &extra);
+	pci_write_config_dword(dev, 0x54, extra | 0x400);
+
+	return 0;
+}
+
+/**
+ *	ich_clear_irq	-	clear BMDMA status
+ *	@drive: IDE drive
+ *
+ *	ICHx contollers set DMA INTR no matter DMA or PIO.
+ *	BMDMA status might need to be cleared even for
+ *	PIO interrupts to prevent spurious/lost IRQ.
+ */
+static void ich_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat;
+
+	/*
+	 * ide_dma_end() needs BMDMA status for error checking.
+	 * So, skip clearing BMDMA status here and leave it
+	 * to ide_dma_end() if this is DMA interrupt.
+	 */
+	if (drive->waiting_for_dma || hwif->dma_base == 0)
+		return;
+
+	/* clear the INTR & ERROR bits */
+	dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);
+	/* Should we force the bit as well ? */
+	outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
+}
+
+struct ich_laptop {
+	u16 device;
+	u16 subvendor;
+	u16 subdevice;
+};
+
+/*
+ *	List of laptops that use short cables rather than 80 wire
+ */
+
+static const struct ich_laptop ich_laptop[] = {
+	/* devid, subvendor, subdev */
+	{ 0x27DF, 0x1025, 0x0102 },	/* ICH7 on Acer 5602aWLMi */
+	{ 0x27DF, 0x0005, 0x0280 },	/* ICH7 on Acer 5602WLMi */
+	{ 0x27DF, 0x1025, 0x0110 },	/* ICH7 on Acer 3682WLMi */
+	{ 0x27DF, 0x1043, 0x1267 },	/* ICH7 on Asus W5F */
+	{ 0x27DF, 0x103C, 0x30A1 },	/* ICH7 on HP Compaq nc2400 */
+	{ 0x27DF, 0x1071, 0xD221 },	/* ICH7 on Hercules EC-900 */
+	{ 0x24CA, 0x1025, 0x0061 },	/* ICH4 on Acer Aspire 2023WLMi */
+	{ 0x24CA, 0x1025, 0x003d },	/* ICH4 on ACER TM290 */
+	{ 0x266F, 0x1025, 0x0066 },	/* ICH6 on ACER Aspire 1694WLMi */
+	{ 0x2653, 0x1043, 0x82D8 },	/* ICH6M on Asus Eee 701 */
+	{ 0x27df, 0x104d, 0x900e },	/* ICH7 on Sony TZ-90 */
+	/* end marker */
+	{ 0, }
+};
+
+static u8 piix_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	const struct ich_laptop *lap = &ich_laptop[0];
+	u8 reg54h = 0, mask = hwif->channel ? 0xc0 : 0x30;
+
+	/* check for specials */
+	while (lap->device) {
+		if (lap->device == pdev->device &&
+		    lap->subvendor == pdev->subsystem_vendor &&
+		    lap->subdevice == pdev->subsystem_device) {
+			return ATA_CBL_PATA40_SHORT;
+		}
+		lap++;
+	}
+
+	pci_read_config_byte(pdev, 0x54, &reg54h);
+
+	return (reg54h & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+}
+
+/**
+ *	init_hwif_piix		-	fill in the hwif for the PIIX
+ *	@hwif: IDE interface
+ *
+ *	Set up the ide_hwif_t for the PIIX interface according to the
+ *	capabilities of the hardware.
+ */
+
+static void init_hwif_piix(ide_hwif_t *hwif)
+{
+	if (!hwif->dma_base)
+		return;
+
+	if (no_piix_dma)
+		hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0;
+}
+
+static const struct ide_port_ops piix_port_ops = {
+	.set_pio_mode		= piix_set_pio_mode,
+	.set_dma_mode		= piix_set_dma_mode,
+	.cable_detect		= piix_cable_detect,
+};
+
+static const struct ide_port_ops ich_port_ops = {
+	.set_pio_mode		= piix_set_pio_mode,
+	.set_dma_mode		= piix_set_dma_mode,
+	.clear_irq		= ich_clear_irq,
+	.cable_detect		= piix_cable_detect,
+};
+
+#define DECLARE_PIIX_DEV(udma) \
+	{						\
+		.name		= DRV_NAME,		\
+		.init_hwif	= init_hwif_piix,	\
+		.enablebits	= {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
+		.port_ops	= &piix_port_ops,	\
+		.pio_mask	= ATA_PIO4,		\
+		.swdma_mask	= ATA_SWDMA2_ONLY,	\
+		.mwdma_mask	= ATA_MWDMA12_ONLY,	\
+		.udma_mask	= udma,			\
+	}
+
+#define DECLARE_ICH_DEV(mwdma, udma) \
+	{ \
+		.name		= DRV_NAME, \
+		.init_chipset	= init_chipset_ich, \
+		.init_hwif	= init_hwif_piix, \
+		.enablebits	= {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
+		.port_ops	= &ich_port_ops, \
+		.pio_mask	= ATA_PIO4, \
+		.swdma_mask	= ATA_SWDMA2_ONLY, \
+		.mwdma_mask	= mwdma, \
+		.udma_mask	= udma, \
+	}
+
+static const struct ide_port_info piix_pci_info[] = {
+	/* 0: MPIIX */
+	{	/*
+		 * MPIIX actually has only a single IDE channel mapped to
+		 * the primary or secondary ports depending on the value
+		 * of the bit 14 of the IDETIM register at offset 0x6c
+		 */
+		.name		= DRV_NAME,
+		.enablebits	= {{0x6d,0xc0,0x80}, {0x6d,0xc0,0xc0}},
+		.host_flags	= IDE_HFLAG_ISA_PORTS | IDE_HFLAG_NO_DMA,
+		.pio_mask	= ATA_PIO4,
+		/* This is a painful system best to let it self tune for now */
+	},
+	/* 1: PIIXa/PIIXb/PIIX3 */
+	DECLARE_PIIX_DEV(0x00), /* no udma */
+	/* 2: PIIX4 */
+	DECLARE_PIIX_DEV(ATA_UDMA2),
+	/* 3: ICH0 */
+	DECLARE_ICH_DEV(ATA_MWDMA12_ONLY, ATA_UDMA2),
+	/* 4: ICH */
+	DECLARE_ICH_DEV(ATA_MWDMA12_ONLY, ATA_UDMA4),
+	/* 5: PIIX4 */
+	DECLARE_PIIX_DEV(ATA_UDMA4),
+	/* 6: ICH[2-6]/ICH[2-3]M/C-ICH/ICH5-SATA/ESB2/ICH8M */
+	DECLARE_ICH_DEV(ATA_MWDMA12_ONLY, ATA_UDMA5),
+	/* 7: ICH7/7-R, no MWDMA1 */
+	DECLARE_ICH_DEV(ATA_MWDMA2_ONLY, ATA_UDMA5),
+};
+
+/**
+ *	piix_init_one	-	called when a PIIX is found
+ *	@dev: the piix device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+ 
+static int piix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &piix_pci_info[id->driver_data], NULL);
+}
+
+/**
+ *	piix_check_450nx	-	Check for problem 450NX setup
+ *	
+ *	Check for the present of 450NX errata #19 and errata #25. If
+ *	they are found, disable use of DMA IDE
+ */
+
+static void piix_check_450nx(void)
+{
+	struct pci_dev *pdev = NULL;
+	u16 cfg;
+	while((pdev=pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev))!=NULL)
+	{
+		/* Look for 450NX PXB. Check for problem configurations
+		   A PCI quirk checks bit 6 already */
+		pci_read_config_word(pdev, 0x41, &cfg);
+		/* Only on the original revision: IDE DMA can hang */
+		if (pdev->revision == 0x00)
+			no_piix_dma = 1;
+		/* On all revisions below 5 PXB bus lock must be disabled for IDE */
+		else if (cfg & (1<<14) && pdev->revision < 5)
+			no_piix_dma = 2;
+	}
+	if(no_piix_dma)
+		printk(KERN_WARNING DRV_NAME ": 450NX errata present, disabling IDE DMA.\n");
+	if(no_piix_dma == 2)
+		printk(KERN_WARNING DRV_NAME ": A BIOS update may resolve this.\n");
+}		
+
+static const struct pci_device_id piix_pci_tbl[] = {
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371FB_0),  1 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371FB_1),  1 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371MX),    0 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371SB_1),  1 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371AB),    2 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AB_1),  3 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82443MX_1),  2 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801AA_1),  4 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82372FB_1),  5 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82451NX),    2 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_9),  6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801BA_8),  6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_10), 6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801CA_11), 6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_11), 6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_11), 6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801E_11),  6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_10), 6 },
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801EB_1),  6 },
+#endif
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB_2),      6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH6_19),    6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH7_21),    7 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_1),  6 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB2_18),    7 },
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH8_6),     6 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
+
+static struct pci_driver piix_pci_driver = {
+	.name		= "PIIX_IDE",
+	.id_table	= piix_pci_tbl,
+	.probe		= piix_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init piix_ide_init(void)
+{
+	piix_check_450nx();
+	return ide_pci_register_driver(&piix_pci_driver);
+}
+
+static void __exit piix_ide_exit(void)
+{
+	pci_unregister_driver(&piix_pci_driver);
+}
+
+module_init(piix_ide_init);
+module_exit(piix_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick, Andrzej Krzysztofowicz");
+MODULE_DESCRIPTION("PCI driver module for Intel PIIX IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/pmac.c b/drivers/ide/pmac.c
new file mode 100644
index 000000000..ea0b064b5
--- /dev/null
+++ b/drivers/ide/pmac.c
@@ -0,0 +1,1703 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Support for IDE interfaces on PowerMacs.
+ *
+ * These IDE interfaces are memory-mapped and have a DBDMA channel
+ * for doing DMA.
+ *
+ *  Copyright (C) 1998-2003 Paul Mackerras & Ben. Herrenschmidt
+ *  Copyright (C) 2007-2008 Bartlomiej Zolnierkiewicz
+ *
+ * Some code taken from drivers/ide/ide-dma.c:
+ *
+ *  Copyright (c) 1995-1998  Mark Lord
+ *
+ * TODO: - Use pre-calculated (kauai) timing tables all the time and
+ * get rid of the "rounded" tables used previously, so we have the
+ * same table format for all controllers and can then just have one
+ * big table
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/notifier.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/pci.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+
+#include <asm/prom.h>
+#include <asm/io.h>
+#include <asm/dbdma.h>
+#include <asm/ide.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#include <asm/sections.h>
+#include <asm/irq.h>
+#include <asm/mediabay.h>
+
+#define DRV_NAME "ide-pmac"
+
+#undef IDE_PMAC_DEBUG
+
+#define DMA_WAIT_TIMEOUT	50
+
+typedef struct pmac_ide_hwif {
+	unsigned long			regbase;
+	int				irq;
+	int				kind;
+	int				aapl_bus_id;
+	unsigned			broken_dma : 1;
+	unsigned			broken_dma_warn : 1;
+	struct device_node*		node;
+	struct macio_dev		*mdev;
+	u32				timings[4];
+	volatile u32 __iomem *		*kauai_fcr;
+	ide_hwif_t			*hwif;
+
+	/* Those fields are duplicating what is in hwif. We currently
+	 * can't use the hwif ones because of some assumptions that are
+	 * beeing done by the generic code about the kind of dma controller
+	 * and format of the dma table. This will have to be fixed though.
+	 */
+	volatile struct dbdma_regs __iomem *	dma_regs;
+	struct dbdma_cmd*		dma_table_cpu;
+} pmac_ide_hwif_t;
+
+enum {
+	controller_ohare,	/* OHare based */
+	controller_heathrow,	/* Heathrow/Paddington */
+	controller_kl_ata3,	/* KeyLargo ATA-3 */
+	controller_kl_ata4,	/* KeyLargo ATA-4 */
+	controller_un_ata6,	/* UniNorth2 ATA-6 */
+	controller_k2_ata6,	/* K2 ATA-6 */
+	controller_sh_ata6,	/* Shasta ATA-6 */
+};
+
+static const char* model_name[] = {
+	"OHare ATA",		/* OHare based */
+	"Heathrow ATA",		/* Heathrow/Paddington */
+	"KeyLargo ATA-3",	/* KeyLargo ATA-3 (MDMA only) */
+	"KeyLargo ATA-4",	/* KeyLargo ATA-4 (UDMA/66) */
+	"UniNorth ATA-6",	/* UniNorth2 ATA-6 (UDMA/100) */
+	"K2 ATA-6",		/* K2 ATA-6 (UDMA/100) */
+	"Shasta ATA-6",		/* Shasta ATA-6 (UDMA/133) */
+};
+
+/*
+ * Extra registers, both 32-bit little-endian
+ */
+#define IDE_TIMING_CONFIG	0x200
+#define IDE_INTERRUPT		0x300
+
+/* Kauai (U2) ATA has different register setup */
+#define IDE_KAUAI_PIO_CONFIG	0x200
+#define IDE_KAUAI_ULTRA_CONFIG	0x210
+#define IDE_KAUAI_POLL_CONFIG	0x220
+
+/*
+ * Timing configuration register definitions
+ */
+
+/* Number of IDE_SYSCLK_NS ticks, argument is in nanoseconds */
+#define SYSCLK_TICKS(t)		(((t) + IDE_SYSCLK_NS - 1) / IDE_SYSCLK_NS)
+#define SYSCLK_TICKS_66(t)	(((t) + IDE_SYSCLK_66_NS - 1) / IDE_SYSCLK_66_NS)
+#define IDE_SYSCLK_NS		30	/* 33Mhz cell */
+#define IDE_SYSCLK_66_NS	15	/* 66Mhz cell */
+
+/* 133Mhz cell, found in shasta.
+ * See comments about 100 Mhz Uninorth 2...
+ * Note that PIO_MASK and MDMA_MASK seem to overlap
+ */
+#define TR_133_PIOREG_PIO_MASK		0xff000fff
+#define TR_133_PIOREG_MDMA_MASK		0x00fff800
+#define TR_133_UDMAREG_UDMA_MASK	0x0003ffff
+#define TR_133_UDMAREG_UDMA_EN		0x00000001
+
+/* 100Mhz cell, found in Uninorth 2. I don't have much infos about
+ * this one yet, it appears as a pci device (106b/0033) on uninorth
+ * internal PCI bus and it's clock is controlled like gem or fw. It
+ * appears to be an evolution of keylargo ATA4 with a timing register
+ * extended to 2 32bits registers and a similar DBDMA channel. Other
+ * registers seem to exist but I can't tell much about them.
+ * 
+ * So far, I'm using pre-calculated tables for this extracted from
+ * the values used by the MacOS X driver.
+ * 
+ * The "PIO" register controls PIO and MDMA timings, the "ULTRA"
+ * register controls the UDMA timings. At least, it seems bit 0
+ * of this one enables UDMA vs. MDMA, and bits 4..7 are the
+ * cycle time in units of 10ns. Bits 8..15 are used by I don't
+ * know their meaning yet
+ */
+#define TR_100_PIOREG_PIO_MASK		0xff000fff
+#define TR_100_PIOREG_MDMA_MASK		0x00fff000
+#define TR_100_UDMAREG_UDMA_MASK	0x0000ffff
+#define TR_100_UDMAREG_UDMA_EN		0x00000001
+
+
+/* 66Mhz cell, found in KeyLargo. Can do ultra mode 0 to 2 on
+ * 40 connector cable and to 4 on 80 connector one.
+ * Clock unit is 15ns (66Mhz)
+ * 
+ * 3 Values can be programmed:
+ *  - Write data setup, which appears to match the cycle time. They
+ *    also call it DIOW setup.
+ *  - Ready to pause time (from spec)
+ *  - Address setup. That one is weird. I don't see where exactly
+ *    it fits in UDMA cycles, I got it's name from an obscure piece
+ *    of commented out code in Darwin. They leave it to 0, we do as
+ *    well, despite a comment that would lead to think it has a
+ *    min value of 45ns.
+ * Apple also add 60ns to the write data setup (or cycle time ?) on
+ * reads.
+ */
+#define TR_66_UDMA_MASK			0xfff00000
+#define TR_66_UDMA_EN			0x00100000 /* Enable Ultra mode for DMA */
+#define TR_66_UDMA_ADDRSETUP_MASK	0xe0000000 /* Address setup */
+#define TR_66_UDMA_ADDRSETUP_SHIFT	29
+#define TR_66_UDMA_RDY2PAUS_MASK	0x1e000000 /* Ready 2 pause time */
+#define TR_66_UDMA_RDY2PAUS_SHIFT	25
+#define TR_66_UDMA_WRDATASETUP_MASK	0x01e00000 /* Write data setup time */
+#define TR_66_UDMA_WRDATASETUP_SHIFT	21
+#define TR_66_MDMA_MASK			0x000ffc00
+#define TR_66_MDMA_RECOVERY_MASK	0x000f8000
+#define TR_66_MDMA_RECOVERY_SHIFT	15
+#define TR_66_MDMA_ACCESS_MASK		0x00007c00
+#define TR_66_MDMA_ACCESS_SHIFT		10
+#define TR_66_PIO_MASK			0x000003ff
+#define TR_66_PIO_RECOVERY_MASK		0x000003e0
+#define TR_66_PIO_RECOVERY_SHIFT	5
+#define TR_66_PIO_ACCESS_MASK		0x0000001f
+#define TR_66_PIO_ACCESS_SHIFT		0
+
+/* 33Mhz cell, found in OHare, Heathrow (& Paddington) and KeyLargo
+ * Can do pio & mdma modes, clock unit is 30ns (33Mhz)
+ * 
+ * The access time and recovery time can be programmed. Some older
+ * Darwin code base limit OHare to 150ns cycle time. I decided to do
+ * the same here fore safety against broken old hardware ;)
+ * The HalfTick bit, when set, adds half a clock (15ns) to the access
+ * time and removes one from recovery. It's not supported on KeyLargo
+ * implementation afaik. The E bit appears to be set for PIO mode 0 and
+ * is used to reach long timings used in this mode.
+ */
+#define TR_33_MDMA_MASK			0x003ff800
+#define TR_33_MDMA_RECOVERY_MASK	0x001f0000
+#define TR_33_MDMA_RECOVERY_SHIFT	16
+#define TR_33_MDMA_ACCESS_MASK		0x0000f800
+#define TR_33_MDMA_ACCESS_SHIFT		11
+#define TR_33_MDMA_HALFTICK		0x00200000
+#define TR_33_PIO_MASK			0x000007ff
+#define TR_33_PIO_E			0x00000400
+#define TR_33_PIO_RECOVERY_MASK		0x000003e0
+#define TR_33_PIO_RECOVERY_SHIFT	5
+#define TR_33_PIO_ACCESS_MASK		0x0000001f
+#define TR_33_PIO_ACCESS_SHIFT		0
+
+/*
+ * Interrupt register definitions
+ */
+#define IDE_INTR_DMA			0x80000000
+#define IDE_INTR_DEVICE			0x40000000
+
+/*
+ * FCR Register on Kauai. Not sure what bit 0x4 is  ...
+ */
+#define KAUAI_FCR_UATA_MAGIC		0x00000004
+#define KAUAI_FCR_UATA_RESET_N		0x00000002
+#define KAUAI_FCR_UATA_ENABLE		0x00000001
+
+/* Rounded Multiword DMA timings
+ * 
+ * I gave up finding a generic formula for all controller
+ * types and instead, built tables based on timing values
+ * used by Apple in Darwin's implementation.
+ */
+struct mdma_timings_t {
+	int	accessTime;
+	int	recoveryTime;
+	int	cycleTime;
+};
+
+struct mdma_timings_t mdma_timings_33[] =
+{
+    { 240, 240, 480 },
+    { 180, 180, 360 },
+    { 135, 135, 270 },
+    { 120, 120, 240 },
+    { 105, 105, 210 },
+    {  90,  90, 180 },
+    {  75,  75, 150 },
+    {  75,  45, 120 },
+    {   0,   0,   0 }
+};
+
+struct mdma_timings_t mdma_timings_33k[] =
+{
+    { 240, 240, 480 },
+    { 180, 180, 360 },
+    { 150, 150, 300 },
+    { 120, 120, 240 },
+    {  90, 120, 210 },
+    {  90,  90, 180 },
+    {  90,  60, 150 },
+    {  90,  30, 120 },
+    {   0,   0,   0 }
+};
+
+struct mdma_timings_t mdma_timings_66[] =
+{
+    { 240, 240, 480 },
+    { 180, 180, 360 },
+    { 135, 135, 270 },
+    { 120, 120, 240 },
+    { 105, 105, 210 },
+    {  90,  90, 180 },
+    {  90,  75, 165 },
+    {  75,  45, 120 },
+    {   0,   0,   0 }
+};
+
+/* KeyLargo ATA-4 Ultra DMA timings (rounded) */
+struct {
+	int	addrSetup; /* ??? */
+	int	rdy2pause;
+	int	wrDataSetup;
+} kl66_udma_timings[] =
+{
+    {   0, 180,  120 },	/* Mode 0 */
+    {   0, 150,  90 },	/*      1 */
+    {   0, 120,  60 },	/*      2 */
+    {   0, 90,   45 },	/*      3 */
+    {   0, 90,   30 }	/*      4 */
+};
+
+/* UniNorth 2 ATA/100 timings */
+struct kauai_timing {
+	int	cycle_time;
+	u32	timing_reg;
+};
+
+static struct kauai_timing	kauai_pio_timings[] =
+{
+	{ 930	, 0x08000fff },
+	{ 600	, 0x08000a92 },
+	{ 383	, 0x0800060f },
+	{ 360	, 0x08000492 },
+	{ 330	, 0x0800048f },
+	{ 300	, 0x080003cf },
+	{ 270	, 0x080003cc },
+	{ 240	, 0x0800038b },
+	{ 239	, 0x0800030c },
+	{ 180	, 0x05000249 },
+	{ 120	, 0x04000148 },
+	{ 0	, 0 },
+};
+
+static struct kauai_timing	kauai_mdma_timings[] =
+{
+	{ 1260	, 0x00fff000 },
+	{ 480	, 0x00618000 },
+	{ 360	, 0x00492000 },
+	{ 270	, 0x0038e000 },
+	{ 240	, 0x0030c000 },
+	{ 210	, 0x002cb000 },
+	{ 180	, 0x00249000 },
+	{ 150	, 0x00209000 },
+	{ 120	, 0x00148000 },
+	{ 0	, 0 },
+};
+
+static struct kauai_timing	kauai_udma_timings[] =
+{
+	{ 120	, 0x000070c0 },
+	{ 90	, 0x00005d80 },
+	{ 60	, 0x00004a60 },
+	{ 45	, 0x00003a50 },
+	{ 30	, 0x00002a30 },
+	{ 20	, 0x00002921 },
+	{ 0	, 0 },
+};
+
+static struct kauai_timing	shasta_pio_timings[] =
+{
+	{ 930	, 0x08000fff },
+	{ 600	, 0x0A000c97 },
+	{ 383	, 0x07000712 },
+	{ 360	, 0x040003cd },
+	{ 330	, 0x040003cd },
+	{ 300	, 0x040003cd },
+	{ 270	, 0x040003cd },
+	{ 240	, 0x040003cd },
+	{ 239	, 0x040003cd },
+	{ 180	, 0x0400028b },
+	{ 120	, 0x0400010a },
+	{ 0	, 0 },
+};
+
+static struct kauai_timing	shasta_mdma_timings[] =
+{
+	{ 1260	, 0x00fff000 },
+	{ 480	, 0x00820800 },
+	{ 360	, 0x00820800 },
+	{ 270	, 0x00820800 },
+	{ 240	, 0x00820800 },
+	{ 210	, 0x00820800 },
+	{ 180	, 0x00820800 },
+	{ 150	, 0x0028b000 },
+	{ 120	, 0x001ca000 },
+	{ 0	, 0 },
+};
+
+static struct kauai_timing	shasta_udma133_timings[] =
+{
+	{ 120   , 0x00035901, },
+	{ 90    , 0x000348b1, },
+	{ 60    , 0x00033881, },
+	{ 45    , 0x00033861, },
+	{ 30    , 0x00033841, },
+	{ 20    , 0x00033031, },
+	{ 15    , 0x00033021, },
+	{ 0	, 0 },
+};
+
+
+static inline u32
+kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
+{
+	int i;
+	
+	for (i=0; table[i].cycle_time; i++)
+		if (cycle_time > table[i+1].cycle_time)
+			return table[i].timing_reg;
+	BUG();
+	return 0;
+}
+
+/* allow up to 256 DBDMA commands per xfer */
+#define MAX_DCMDS		256
+
+/* 
+ * Wait 1s for disk to answer on IDE bus after a hard reset
+ * of the device (via GPIO/FCR).
+ * 
+ * Some devices seem to "pollute" the bus even after dropping
+ * the BSY bit (typically some combo drives slave on the UDMA
+ * bus) after a hard reset. Since we hard reset all drives on
+ * KeyLargo ATA66, we have to keep that delay around. I may end
+ * up not hard resetting anymore on these and keep the delay only
+ * for older interfaces instead (we have to reset when coming
+ * from MacOS...) --BenH. 
+ */
+#define IDE_WAKEUP_DELAY	(1*HZ)
+
+static int pmac_ide_init_dma(ide_hwif_t *, const struct ide_port_info *);
+
+#define PMAC_IDE_REG(x) \
+	((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
+
+/*
+ * Apply the timings of the proper unit (master/slave) to the shared
+ * timing register when selecting that unit. This version is for
+ * ASICs with a single timing register
+ */
+static void pmac_ide_apply_timings(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+	if (drive->dn & 1)
+		writel(pmif->timings[1], PMAC_IDE_REG(IDE_TIMING_CONFIG));
+	else
+		writel(pmif->timings[0], PMAC_IDE_REG(IDE_TIMING_CONFIG));
+	(void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
+}
+
+/*
+ * Apply the timings of the proper unit (master/slave) to the shared
+ * timing register when selecting that unit. This version is for
+ * ASICs with a dual timing register (Kauai)
+ */
+static void pmac_ide_kauai_apply_timings(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+	if (drive->dn & 1) {
+		writel(pmif->timings[1], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
+		writel(pmif->timings[3], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
+	} else {
+		writel(pmif->timings[0], PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
+		writel(pmif->timings[2], PMAC_IDE_REG(IDE_KAUAI_ULTRA_CONFIG));
+	}
+	(void)readl(PMAC_IDE_REG(IDE_KAUAI_PIO_CONFIG));
+}
+
+/*
+ * Force an update of controller timing values for a given drive
+ */
+static void
+pmac_ide_do_update_timings(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+	if (pmif->kind == controller_sh_ata6 ||
+	    pmif->kind == controller_un_ata6 ||
+	    pmif->kind == controller_k2_ata6)
+		pmac_ide_kauai_apply_timings(drive);
+	else
+		pmac_ide_apply_timings(drive);
+}
+
+static void pmac_dev_select(ide_drive_t *drive)
+{
+	pmac_ide_apply_timings(drive);
+
+	writeb(drive->select | ATA_DEVICE_OBS,
+	       (void __iomem *)drive->hwif->io_ports.device_addr);
+}
+
+static void pmac_kauai_dev_select(ide_drive_t *drive)
+{
+	pmac_ide_kauai_apply_timings(drive);
+
+	writeb(drive->select | ATA_DEVICE_OBS,
+	       (void __iomem *)drive->hwif->io_ports.device_addr);
+}
+
+static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
+{
+	writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
+	(void)readl((void __iomem *)(hwif->io_ports.data_addr
+				     + IDE_TIMING_CONFIG));
+}
+
+static void pmac_write_devctl(ide_hwif_t *hwif, u8 ctl)
+{
+	writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+	(void)readl((void __iomem *)(hwif->io_ports.data_addr
+				     + IDE_TIMING_CONFIG));
+}
+
+/*
+ * Old tuning functions (called on hdparm -p), sets up drive PIO timings
+ */
+static void pmac_ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	struct ide_timing *tim = ide_timing_find_mode(XFER_PIO_0 + pio);
+	u32 *timings, t;
+	unsigned accessTicks, recTicks;
+	unsigned accessTime, recTime;
+	unsigned int cycle_time;
+
+	/* which drive is it ? */
+	timings = &pmif->timings[drive->dn & 1];
+	t = *timings;
+
+	cycle_time = ide_pio_cycle_time(drive, pio);
+
+	switch (pmif->kind) {
+	case controller_sh_ata6: {
+		/* 133Mhz cell */
+		u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
+		t = (t & ~TR_133_PIOREG_PIO_MASK) | tr;
+		break;
+		}
+	case controller_un_ata6:
+	case controller_k2_ata6: {
+		/* 100Mhz cell */
+		u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
+		t = (t & ~TR_100_PIOREG_PIO_MASK) | tr;
+		break;
+		}
+	case controller_kl_ata4:
+		/* 66Mhz cell */
+		recTime = cycle_time - tim->active - tim->setup;
+		recTime = max(recTime, 150U);
+		accessTime = tim->active;
+		accessTime = max(accessTime, 150U);
+		accessTicks = SYSCLK_TICKS_66(accessTime);
+		accessTicks = min(accessTicks, 0x1fU);
+		recTicks = SYSCLK_TICKS_66(recTime);
+		recTicks = min(recTicks, 0x1fU);
+		t = (t & ~TR_66_PIO_MASK) |
+			(accessTicks << TR_66_PIO_ACCESS_SHIFT) |
+			(recTicks << TR_66_PIO_RECOVERY_SHIFT);
+		break;
+	default: {
+		/* 33Mhz cell */
+		int ebit = 0;
+		recTime = cycle_time - tim->active - tim->setup;
+		recTime = max(recTime, 150U);
+		accessTime = tim->active;
+		accessTime = max(accessTime, 150U);
+		accessTicks = SYSCLK_TICKS(accessTime);
+		accessTicks = min(accessTicks, 0x1fU);
+		accessTicks = max(accessTicks, 4U);
+		recTicks = SYSCLK_TICKS(recTime);
+		recTicks = min(recTicks, 0x1fU);
+		recTicks = max(recTicks, 5U) - 4;
+		if (recTicks > 9) {
+			recTicks--; /* guess, but it's only for PIO0, so... */
+			ebit = 1;
+		}
+		t = (t & ~TR_33_PIO_MASK) |
+				(accessTicks << TR_33_PIO_ACCESS_SHIFT) |
+				(recTicks << TR_33_PIO_RECOVERY_SHIFT);
+		if (ebit)
+			t |= TR_33_PIO_E;
+		break;
+		}
+	}
+
+#ifdef IDE_PMAC_DEBUG
+	printk(KERN_ERR "%s: Set PIO timing for mode %d, reg: 0x%08x\n",
+		drive->name, pio,  *timings);
+#endif	
+
+	*timings = t;
+	pmac_ide_do_update_timings(drive);
+}
+
+/*
+ * Calculate KeyLargo ATA/66 UDMA timings
+ */
+static int
+set_timings_udma_ata4(u32 *timings, u8 speed)
+{
+	unsigned rdyToPauseTicks, wrDataSetupTicks, addrTicks;
+
+	if (speed > XFER_UDMA_4)
+		return 1;
+
+	rdyToPauseTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].rdy2pause);
+	wrDataSetupTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].wrDataSetup);
+	addrTicks = SYSCLK_TICKS_66(kl66_udma_timings[speed & 0xf].addrSetup);
+
+	*timings = ((*timings) & ~(TR_66_UDMA_MASK | TR_66_MDMA_MASK)) |
+			(wrDataSetupTicks << TR_66_UDMA_WRDATASETUP_SHIFT) | 
+			(rdyToPauseTicks << TR_66_UDMA_RDY2PAUS_SHIFT) |
+			(addrTicks <<TR_66_UDMA_ADDRSETUP_SHIFT) |
+			TR_66_UDMA_EN;
+#ifdef IDE_PMAC_DEBUG
+	printk(KERN_ERR "ide_pmac: Set UDMA timing for mode %d, reg: 0x%08x\n",
+		speed & 0xf,  *timings);
+#endif	
+
+	return 0;
+}
+
+/*
+ * Calculate Kauai ATA/100 UDMA timings
+ */
+static int
+set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
+{
+	struct ide_timing *t = ide_timing_find_mode(speed);
+	u32 tr;
+
+	if (speed > XFER_UDMA_5 || t == NULL)
+		return 1;
+	tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
+	*ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
+	*ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
+
+	return 0;
+}
+
+/*
+ * Calculate Shasta ATA/133 UDMA timings
+ */
+static int
+set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
+{
+	struct ide_timing *t = ide_timing_find_mode(speed);
+	u32 tr;
+
+	if (speed > XFER_UDMA_6 || t == NULL)
+		return 1;
+	tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
+	*ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
+	*ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
+
+	return 0;
+}
+
+/*
+ * Calculate MDMA timings for all cells
+ */
+static void
+set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
+		 	u8 speed)
+{
+	u16 *id = drive->id;
+	int cycleTime, accessTime = 0, recTime = 0;
+	unsigned accessTicks, recTicks;
+	struct mdma_timings_t* tm = NULL;
+	int i;
+
+	/* Get default cycle time for mode */
+	switch(speed & 0xf) {
+		case 0: cycleTime = 480; break;
+		case 1: cycleTime = 150; break;
+		case 2: cycleTime = 120; break;
+		default:
+			BUG();
+			break;
+	}
+
+	/* Check if drive provides explicit DMA cycle time */
+	if ((id[ATA_ID_FIELD_VALID] & 2) && id[ATA_ID_EIDE_DMA_TIME])
+		cycleTime = max_t(int, id[ATA_ID_EIDE_DMA_TIME], cycleTime);
+
+	/* OHare limits according to some old Apple sources */	
+	if ((intf_type == controller_ohare) && (cycleTime < 150))
+		cycleTime = 150;
+	/* Get the proper timing array for this controller */
+	switch(intf_type) {
+	        case controller_sh_ata6:
+		case controller_un_ata6:
+		case controller_k2_ata6:
+			break;
+		case controller_kl_ata4:
+			tm = mdma_timings_66;
+			break;
+		case controller_kl_ata3:
+			tm = mdma_timings_33k;
+			break;
+		default:
+			tm = mdma_timings_33;
+			break;
+	}
+	if (tm != NULL) {
+		/* Lookup matching access & recovery times */
+		i = -1;
+		for (;;) {
+			if (tm[i+1].cycleTime < cycleTime)
+				break;
+			i++;
+		}
+		cycleTime = tm[i].cycleTime;
+		accessTime = tm[i].accessTime;
+		recTime = tm[i].recoveryTime;
+
+#ifdef IDE_PMAC_DEBUG
+		printk(KERN_ERR "%s: MDMA, cycleTime: %d, accessTime: %d, recTime: %d\n",
+			drive->name, cycleTime, accessTime, recTime);
+#endif
+	}
+	switch(intf_type) {
+	case controller_sh_ata6: {
+		/* 133Mhz cell */
+		u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
+		*timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
+		*timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
+		}
+		break;
+	case controller_un_ata6:
+	case controller_k2_ata6: {
+		/* 100Mhz cell */
+		u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
+		*timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
+		*timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
+		}
+		break;
+	case controller_kl_ata4:
+		/* 66Mhz cell */
+		accessTicks = SYSCLK_TICKS_66(accessTime);
+		accessTicks = min(accessTicks, 0x1fU);
+		accessTicks = max(accessTicks, 0x1U);
+		recTicks = SYSCLK_TICKS_66(recTime);
+		recTicks = min(recTicks, 0x1fU);
+		recTicks = max(recTicks, 0x3U);
+		/* Clear out mdma bits and disable udma */
+		*timings = ((*timings) & ~(TR_66_MDMA_MASK | TR_66_UDMA_MASK)) |
+			(accessTicks << TR_66_MDMA_ACCESS_SHIFT) |
+			(recTicks << TR_66_MDMA_RECOVERY_SHIFT);
+		break;
+	case controller_kl_ata3:
+		/* 33Mhz cell on KeyLargo */
+		accessTicks = SYSCLK_TICKS(accessTime);
+		accessTicks = max(accessTicks, 1U);
+		accessTicks = min(accessTicks, 0x1fU);
+		accessTime = accessTicks * IDE_SYSCLK_NS;
+		recTicks = SYSCLK_TICKS(recTime);
+		recTicks = max(recTicks, 1U);
+		recTicks = min(recTicks, 0x1fU);
+		*timings = ((*timings) & ~TR_33_MDMA_MASK) |
+				(accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
+				(recTicks << TR_33_MDMA_RECOVERY_SHIFT);
+		break;
+	default: {
+		/* 33Mhz cell on others */
+		int halfTick = 0;
+		int origAccessTime = accessTime;
+		int origRecTime = recTime;
+		
+		accessTicks = SYSCLK_TICKS(accessTime);
+		accessTicks = max(accessTicks, 1U);
+		accessTicks = min(accessTicks, 0x1fU);
+		accessTime = accessTicks * IDE_SYSCLK_NS;
+		recTicks = SYSCLK_TICKS(recTime);
+		recTicks = max(recTicks, 2U) - 1;
+		recTicks = min(recTicks, 0x1fU);
+		recTime = (recTicks + 1) * IDE_SYSCLK_NS;
+		if ((accessTicks > 1) &&
+		    ((accessTime - IDE_SYSCLK_NS/2) >= origAccessTime) &&
+		    ((recTime - IDE_SYSCLK_NS/2) >= origRecTime)) {
+            		halfTick = 1;
+			accessTicks--;
+		}
+		*timings = ((*timings) & ~TR_33_MDMA_MASK) |
+				(accessTicks << TR_33_MDMA_ACCESS_SHIFT) |
+				(recTicks << TR_33_MDMA_RECOVERY_SHIFT);
+		if (halfTick)
+			*timings |= TR_33_MDMA_HALFTICK;
+		}
+	}
+#ifdef IDE_PMAC_DEBUG
+	printk(KERN_ERR "%s: Set MDMA timing for mode %d, reg: 0x%08x\n",
+		drive->name, speed & 0xf,  *timings);
+#endif	
+}
+
+static void pmac_ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	int ret = 0;
+	u32 *timings, *timings2, tl[2];
+	u8 unit = drive->dn & 1;
+	const u8 speed = drive->dma_mode;
+
+	timings = &pmif->timings[unit];
+	timings2 = &pmif->timings[unit+2];
+
+	/* Copy timings to local image */
+	tl[0] = *timings;
+	tl[1] = *timings2;
+
+	if (speed >= XFER_UDMA_0) {
+		if (pmif->kind == controller_kl_ata4)
+			ret = set_timings_udma_ata4(&tl[0], speed);
+		else if (pmif->kind == controller_un_ata6
+			 || pmif->kind == controller_k2_ata6)
+			ret = set_timings_udma_ata6(&tl[0], &tl[1], speed);
+		else if (pmif->kind == controller_sh_ata6)
+			ret = set_timings_udma_shasta(&tl[0], &tl[1], speed);
+		else
+			ret = -1;
+	} else
+		set_timings_mdma(drive, pmif->kind, &tl[0], &tl[1], speed);
+
+	if (ret)
+		return;
+
+	/* Apply timings to controller */
+	*timings = tl[0];
+	*timings2 = tl[1];
+
+	pmac_ide_do_update_timings(drive);	
+}
+
+/*
+ * Blast some well known "safe" values to the timing registers at init or
+ * wakeup from sleep time, before we do real calculation
+ */
+static void
+sanitize_timings(pmac_ide_hwif_t *pmif)
+{
+	unsigned int value, value2 = 0;
+	
+	switch(pmif->kind) {
+		case controller_sh_ata6:
+			value = 0x0a820c97;
+			value2 = 0x00033031;
+			break;
+		case controller_un_ata6:
+		case controller_k2_ata6:
+			value = 0x08618a92;
+			value2 = 0x00002921;
+			break;
+		case controller_kl_ata4:
+			value = 0x0008438c;
+			break;
+		case controller_kl_ata3:
+			value = 0x00084526;
+			break;
+		case controller_heathrow:
+		case controller_ohare:
+		default:
+			value = 0x00074526;
+			break;
+	}
+	pmif->timings[0] = pmif->timings[1] = value;
+	pmif->timings[2] = pmif->timings[3] = value2;
+}
+
+static int on_media_bay(pmac_ide_hwif_t *pmif)
+{
+	return pmif->mdev && pmif->mdev->media_bay != NULL;
+}
+
+/* Suspend call back, should be called after the child devices
+ * have actually been suspended
+ */
+static int pmac_ide_do_suspend(pmac_ide_hwif_t *pmif)
+{
+	/* We clear the timings */
+	pmif->timings[0] = 0;
+	pmif->timings[1] = 0;
+	
+	disable_irq(pmif->irq);
+
+	/* The media bay will handle itself just fine */
+	if (on_media_bay(pmif))
+		return 0;
+	
+	/* Kauai has bus control FCRs directly here */
+	if (pmif->kauai_fcr) {
+		u32 fcr = readl(pmif->kauai_fcr);
+		fcr &= ~(KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE);
+		writel(fcr, pmif->kauai_fcr);
+	}
+
+	/* Disable the bus on older machines and the cell on kauai */
+	ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id,
+			    0);
+
+	return 0;
+}
+
+/* Resume call back, should be called before the child devices
+ * are resumed
+ */
+static int pmac_ide_do_resume(pmac_ide_hwif_t *pmif)
+{
+	/* Hard reset & re-enable controller (do we really need to reset ? -BenH) */
+	if (!on_media_bay(pmif)) {
+		ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 1);
+		ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, pmif->node, pmif->aapl_bus_id, 1);
+		msleep(10);
+		ppc_md.feature_call(PMAC_FTR_IDE_RESET, pmif->node, pmif->aapl_bus_id, 0);
+
+		/* Kauai has it different */
+		if (pmif->kauai_fcr) {
+			u32 fcr = readl(pmif->kauai_fcr);
+			fcr |= KAUAI_FCR_UATA_RESET_N | KAUAI_FCR_UATA_ENABLE;
+			writel(fcr, pmif->kauai_fcr);
+		}
+
+		msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
+	}
+
+	/* Sanitize drive timings */
+	sanitize_timings(pmif);
+
+	enable_irq(pmif->irq);
+
+	return 0;
+}
+
+static u8 pmac_ide_cable_detect(ide_hwif_t *hwif)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	struct device_node *np = pmif->node;
+	const char *cable = of_get_property(np, "cable-type", NULL);
+	struct device_node *root = of_find_node_by_path("/");
+	const char *model = of_get_property(root, "model", NULL);
+
+	of_node_put(root);
+	/* Get cable type from device-tree. */
+	if (cable && !strncmp(cable, "80-", 3)) {
+		/* Some drives fail to detect 80c cable in PowerBook */
+		/* These machine use proprietary short IDE cable anyway */
+		if (!strncmp(model, "PowerBook", 9))
+			return ATA_CBL_PATA40_SHORT;
+		else
+			return ATA_CBL_PATA80;
+	}
+
+	/*
+	 * G5's seem to have incorrect cable type in device-tree.
+	 * Let's assume they have a 80 conductor cable, this seem
+	 * to be always the case unless the user mucked around.
+	 */
+	if (of_device_is_compatible(np, "K2-UATA") ||
+	    of_device_is_compatible(np, "shasta-ata"))
+		return ATA_CBL_PATA80;
+
+	return ATA_CBL_PATA40;
+}
+
+static void pmac_ide_init_dev(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+
+	if (on_media_bay(pmif)) {
+		if (check_media_bay(pmif->mdev->media_bay) == MB_CD) {
+			drive->dev_flags &= ~IDE_DFLAG_NOPROBE;
+			return;
+		}
+		drive->dev_flags |= IDE_DFLAG_NOPROBE;
+	}
+}
+
+static const struct ide_tp_ops pmac_tp_ops = {
+	.exec_command		= pmac_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= pmac_write_devctl,
+
+	.dev_select		= pmac_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_tp_ops pmac_ata6_tp_ops = {
+	.exec_command		= pmac_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= pmac_write_devctl,
+
+	.dev_select		= pmac_kauai_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_port_ops pmac_ide_ata4_port_ops = {
+	.init_dev		= pmac_ide_init_dev,
+	.set_pio_mode		= pmac_ide_set_pio_mode,
+	.set_dma_mode		= pmac_ide_set_dma_mode,
+	.cable_detect		= pmac_ide_cable_detect,
+};
+
+static const struct ide_port_ops pmac_ide_port_ops = {
+	.init_dev		= pmac_ide_init_dev,
+	.set_pio_mode		= pmac_ide_set_pio_mode,
+	.set_dma_mode		= pmac_ide_set_dma_mode,
+};
+
+static const struct ide_dma_ops pmac_dma_ops;
+
+static const struct ide_port_info pmac_port_info = {
+	.name			= DRV_NAME,
+	.init_dma		= pmac_ide_init_dma,
+	.chipset		= ide_pmac,
+	.tp_ops			= &pmac_tp_ops,
+	.port_ops		= &pmac_ide_port_ops,
+	.dma_ops		= &pmac_dma_ops,
+	.host_flags		= IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
+				  IDE_HFLAG_POST_SET_MODE |
+				  IDE_HFLAG_MMIO |
+				  IDE_HFLAG_UNMASK_IRQS,
+	.pio_mask		= ATA_PIO4,
+	.mwdma_mask		= ATA_MWDMA2,
+};
+
+/*
+ * Setup, register & probe an IDE channel driven by this driver, this is
+ * called by one of the 2 probe functions (macio or PCI).
+ */
+static int pmac_ide_setup_device(pmac_ide_hwif_t *pmif, struct ide_hw *hw)
+{
+	struct device_node *np = pmif->node;
+	const int *bidp;
+	struct ide_host *host;
+	struct ide_hw *hws[] = { hw };
+	struct ide_port_info d = pmac_port_info;
+	int rc;
+
+	pmif->broken_dma = pmif->broken_dma_warn = 0;
+	if (of_device_is_compatible(np, "shasta-ata")) {
+		pmif->kind = controller_sh_ata6;
+		d.tp_ops = &pmac_ata6_tp_ops;
+		d.port_ops = &pmac_ide_ata4_port_ops;
+		d.udma_mask = ATA_UDMA6;
+	} else if (of_device_is_compatible(np, "kauai-ata")) {
+		pmif->kind = controller_un_ata6;
+		d.tp_ops = &pmac_ata6_tp_ops;
+		d.port_ops = &pmac_ide_ata4_port_ops;
+		d.udma_mask = ATA_UDMA5;
+	} else if (of_device_is_compatible(np, "K2-UATA")) {
+		pmif->kind = controller_k2_ata6;
+		d.tp_ops = &pmac_ata6_tp_ops;
+		d.port_ops = &pmac_ide_ata4_port_ops;
+		d.udma_mask = ATA_UDMA5;
+	} else if (of_device_is_compatible(np, "keylargo-ata")) {
+		if (of_node_name_eq(np, "ata-4")) {
+			pmif->kind = controller_kl_ata4;
+			d.port_ops = &pmac_ide_ata4_port_ops;
+			d.udma_mask = ATA_UDMA4;
+		} else
+			pmif->kind = controller_kl_ata3;
+	} else if (of_device_is_compatible(np, "heathrow-ata")) {
+		pmif->kind = controller_heathrow;
+	} else {
+		pmif->kind = controller_ohare;
+		pmif->broken_dma = 1;
+	}
+
+	bidp = of_get_property(np, "AAPL,bus-id", NULL);
+	pmif->aapl_bus_id =  bidp ? *bidp : 0;
+
+	/* On Kauai-type controllers, we make sure the FCR is correct */
+	if (pmif->kauai_fcr)
+		writel(KAUAI_FCR_UATA_MAGIC |
+		       KAUAI_FCR_UATA_RESET_N |
+		       KAUAI_FCR_UATA_ENABLE, pmif->kauai_fcr);
+	
+	/* Make sure we have sane timings */
+	sanitize_timings(pmif);
+
+	/* If we are on a media bay, wait for it to settle and lock it */
+	if (pmif->mdev)
+		lock_media_bay(pmif->mdev->media_bay);
+
+	host = ide_host_alloc(&d, hws, 1);
+	if (host == NULL) {
+		rc = -ENOMEM;
+		goto bail;
+	}
+	pmif->hwif = host->ports[0];
+
+	if (on_media_bay(pmif)) {
+		/* Fixup bus ID for media bay */
+		if (!bidp)
+			pmif->aapl_bus_id = 1;
+	} else if (pmif->kind == controller_ohare) {
+		/* The code below is having trouble on some ohare machines
+		 * (timing related ?). Until I can put my hand on one of these
+		 * units, I keep the old way
+		 */
+		ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, 0, 1);
+	} else {
+ 		/* This is necessary to enable IDE when net-booting */
+		ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 1);
+		ppc_md.feature_call(PMAC_FTR_IDE_ENABLE, np, pmif->aapl_bus_id, 1);
+		msleep(10);
+		ppc_md.feature_call(PMAC_FTR_IDE_RESET, np, pmif->aapl_bus_id, 0);
+		msleep(jiffies_to_msecs(IDE_WAKEUP_DELAY));
+	}
+
+	printk(KERN_INFO DRV_NAME ": Found Apple %s controller (%s), "
+	       "bus ID %d%s, irq %d\n", model_name[pmif->kind],
+	       pmif->mdev ? "macio" : "PCI", pmif->aapl_bus_id,
+	       on_media_bay(pmif) ? " (mediabay)" : "", hw->irq);
+
+	rc = ide_host_register(host, &d, hws);
+	if (rc)
+		pmif->hwif = NULL;
+
+	if (pmif->mdev)
+		unlock_media_bay(pmif->mdev->media_bay);
+
+ bail:
+	if (rc && host)
+		ide_host_free(host);
+	return rc;
+}
+
+static void pmac_ide_init_ports(struct ide_hw *hw, unsigned long base)
+{
+	int i;
+
+	for (i = 0; i < 8; ++i)
+		hw->io_ports_array[i] = base + i * 0x10;
+
+	hw->io_ports.ctl_addr = base + 0x160;
+}
+
+/*
+ * Attach to a macio probed interface
+ */
+static int pmac_ide_macio_attach(struct macio_dev *mdev,
+				 const struct of_device_id *match)
+{
+	void __iomem *base;
+	unsigned long regbase;
+	pmac_ide_hwif_t *pmif;
+	int irq, rc;
+	struct ide_hw hw;
+
+	pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
+	if (pmif == NULL)
+		return -ENOMEM;
+
+	if (macio_resource_count(mdev) == 0) {
+		printk(KERN_WARNING "ide-pmac: no address for %pOF\n",
+				    mdev->ofdev.dev.of_node);
+		rc = -ENXIO;
+		goto out_free_pmif;
+	}
+
+	/* Request memory resource for IO ports */
+	if (macio_request_resource(mdev, 0, "ide-pmac (ports)")) {
+		printk(KERN_ERR "ide-pmac: can't request MMIO resource for "
+				"%pOF!\n", mdev->ofdev.dev.of_node);
+		rc = -EBUSY;
+		goto out_free_pmif;
+	}
+			
+	/* XXX This is bogus. Should be fixed in the registry by checking
+	 * the kind of host interrupt controller, a bit like gatwick
+	 * fixes in irq.c. That works well enough for the single case
+	 * where that happens though...
+	 */
+	if (macio_irq_count(mdev) == 0) {
+		printk(KERN_WARNING "ide-pmac: no intrs for device %pOF, using "
+				    "13\n", mdev->ofdev.dev.of_node);
+		irq = irq_create_mapping(NULL, 13);
+	} else
+		irq = macio_irq(mdev, 0);
+
+	base = ioremap(macio_resource_start(mdev, 0), 0x400);
+	regbase = (unsigned long) base;
+
+	pmif->mdev = mdev;
+	pmif->node = mdev->ofdev.dev.of_node;
+	pmif->regbase = regbase;
+	pmif->irq = irq;
+	pmif->kauai_fcr = NULL;
+
+	if (macio_resource_count(mdev) >= 2) {
+		if (macio_request_resource(mdev, 1, "ide-pmac (dma)"))
+			printk(KERN_WARNING "ide-pmac: can't request DMA "
+					    "resource for %pOF!\n",
+					    mdev->ofdev.dev.of_node);
+		else
+			pmif->dma_regs = ioremap(macio_resource_start(mdev, 1), 0x1000);
+	} else
+		pmif->dma_regs = NULL;
+
+	dev_set_drvdata(&mdev->ofdev.dev, pmif);
+
+	memset(&hw, 0, sizeof(hw));
+	pmac_ide_init_ports(&hw, pmif->regbase);
+	hw.irq = irq;
+	hw.dev = &mdev->bus->pdev->dev;
+	hw.parent = &mdev->ofdev.dev;
+
+	rc = pmac_ide_setup_device(pmif, &hw);
+	if (rc != 0) {
+		/* The inteface is released to the common IDE layer */
+		dev_set_drvdata(&mdev->ofdev.dev, NULL);
+		iounmap(base);
+		if (pmif->dma_regs) {
+			iounmap(pmif->dma_regs);
+			macio_release_resource(mdev, 1);
+		}
+		macio_release_resource(mdev, 0);
+		kfree(pmif);
+	}
+
+	return rc;
+
+out_free_pmif:
+	kfree(pmif);
+	return rc;
+}
+
+static int
+pmac_ide_macio_suspend(struct macio_dev *mdev, pm_message_t mesg)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+	int rc = 0;
+
+	if (mesg.event != mdev->ofdev.dev.power.power_state.event
+			&& (mesg.event & PM_EVENT_SLEEP)) {
+		rc = pmac_ide_do_suspend(pmif);
+		if (rc == 0)
+			mdev->ofdev.dev.power.power_state = mesg;
+	}
+
+	return rc;
+}
+
+static int
+pmac_ide_macio_resume(struct macio_dev *mdev)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+	int rc = 0;
+
+	if (mdev->ofdev.dev.power.power_state.event != PM_EVENT_ON) {
+		rc = pmac_ide_do_resume(pmif);
+		if (rc == 0)
+			mdev->ofdev.dev.power.power_state = PMSG_ON;
+	}
+
+	return rc;
+}
+
+/*
+ * Attach to a PCI probed interface
+ */
+static int pmac_ide_pci_attach(struct pci_dev *pdev,
+			       const struct pci_device_id *id)
+{
+	struct device_node *np;
+	pmac_ide_hwif_t *pmif;
+	void __iomem *base;
+	unsigned long rbase, rlen;
+	int rc;
+	struct ide_hw hw;
+
+	np = pci_device_to_OF_node(pdev);
+	if (np == NULL) {
+		printk(KERN_ERR "ide-pmac: cannot find MacIO node for Kauai ATA interface\n");
+		return -ENODEV;
+	}
+
+	pmif = kzalloc(sizeof(*pmif), GFP_KERNEL);
+	if (pmif == NULL)
+		return -ENOMEM;
+
+	if (pci_enable_device(pdev)) {
+		printk(KERN_WARNING "ide-pmac: Can't enable PCI device for "
+				    "%pOF\n", np);
+		rc = -ENXIO;
+		goto out_free_pmif;
+	}
+	pci_set_master(pdev);
+			
+	if (pci_request_regions(pdev, "Kauai ATA")) {
+		printk(KERN_ERR "ide-pmac: Cannot obtain PCI resources for "
+				"%pOF\n", np);
+		rc = -ENXIO;
+		goto out_free_pmif;
+	}
+
+	pmif->mdev = NULL;
+	pmif->node = np;
+
+	rbase = pci_resource_start(pdev, 0);
+	rlen = pci_resource_len(pdev, 0);
+
+	base = ioremap(rbase, rlen);
+	pmif->regbase = (unsigned long) base + 0x2000;
+	pmif->dma_regs = base + 0x1000;
+	pmif->kauai_fcr = base;
+	pmif->irq = pdev->irq;
+
+	pci_set_drvdata(pdev, pmif);
+
+	memset(&hw, 0, sizeof(hw));
+	pmac_ide_init_ports(&hw, pmif->regbase);
+	hw.irq = pdev->irq;
+	hw.dev = &pdev->dev;
+
+	rc = pmac_ide_setup_device(pmif, &hw);
+	if (rc != 0) {
+		/* The inteface is released to the common IDE layer */
+		iounmap(base);
+		pci_release_regions(pdev);
+		kfree(pmif);
+	}
+
+	return rc;
+
+out_free_pmif:
+	kfree(pmif);
+	return rc;
+}
+
+static int
+pmac_ide_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+	pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
+	int rc = 0;
+
+	if (mesg.event != pdev->dev.power.power_state.event
+			&& (mesg.event & PM_EVENT_SLEEP)) {
+		rc = pmac_ide_do_suspend(pmif);
+		if (rc == 0)
+			pdev->dev.power.power_state = mesg;
+	}
+
+	return rc;
+}
+
+static int
+pmac_ide_pci_resume(struct pci_dev *pdev)
+{
+	pmac_ide_hwif_t *pmif = pci_get_drvdata(pdev);
+	int rc = 0;
+
+	if (pdev->dev.power.power_state.event != PM_EVENT_ON) {
+		rc = pmac_ide_do_resume(pmif);
+		if (rc == 0)
+			pdev->dev.power.power_state = PMSG_ON;
+	}
+
+	return rc;
+}
+
+#ifdef CONFIG_PMAC_MEDIABAY
+static void pmac_ide_macio_mb_event(struct macio_dev* mdev, int mb_state)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(&mdev->ofdev.dev);
+
+	switch(mb_state) {
+	case MB_CD:
+		if (!pmif->hwif->present)
+			ide_port_scan(pmif->hwif);
+		break;
+	default:
+		if (pmif->hwif->present)
+			ide_port_unregister_devices(pmif->hwif);
+	}
+}
+#endif /* CONFIG_PMAC_MEDIABAY */
+
+
+static struct of_device_id pmac_ide_macio_match[] = 
+{
+	{
+	.name 		= "IDE",
+	},
+	{
+	.name 		= "ATA",
+	},
+	{
+	.type		= "ide",
+	},
+	{
+	.type		= "ata",
+	},
+	{},
+};
+
+static struct macio_driver pmac_ide_macio_driver = 
+{
+	.driver = {
+		.name 		= "ide-pmac",
+		.owner		= THIS_MODULE,
+		.of_match_table	= pmac_ide_macio_match,
+	},
+	.probe		= pmac_ide_macio_attach,
+	.suspend	= pmac_ide_macio_suspend,
+	.resume		= pmac_ide_macio_resume,
+#ifdef CONFIG_PMAC_MEDIABAY
+	.mediabay_event	= pmac_ide_macio_mb_event,
+#endif
+};
+
+static const struct pci_device_id pmac_ide_pci_match[] = {
+	{ PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_UNI_N_ATA),	0 },
+	{ PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID_ATA100),	0 },
+	{ PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_K2_ATA100),	0 },
+	{ PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_SH_ATA),	0 },
+	{ PCI_VDEVICE(APPLE, PCI_DEVICE_ID_APPLE_IPID2_ATA),	0 },
+	{},
+};
+
+static struct pci_driver pmac_ide_pci_driver = {
+	.name		= "ide-pmac",
+	.id_table	= pmac_ide_pci_match,
+	.probe		= pmac_ide_pci_attach,
+	.suspend	= pmac_ide_pci_suspend,
+	.resume		= pmac_ide_pci_resume,
+};
+MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
+
+int __init pmac_ide_probe(void)
+{
+	int error;
+
+	if (!machine_is(powermac))
+		return -ENODEV;
+
+#ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
+	error = pci_register_driver(&pmac_ide_pci_driver);
+	if (error)
+		goto out;
+	error = macio_register_driver(&pmac_ide_macio_driver);
+	if (error) {
+		pci_unregister_driver(&pmac_ide_pci_driver);
+		goto out;
+	}
+#else
+	error = macio_register_driver(&pmac_ide_macio_driver);
+	if (error)
+		goto out;
+	error = pci_register_driver(&pmac_ide_pci_driver);
+	if (error) {
+		macio_unregister_driver(&pmac_ide_macio_driver);
+		goto out;
+	}
+#endif
+out:
+	return error;
+}
+
+/*
+ * pmac_ide_build_dmatable builds the DBDMA command list
+ * for a transfer and sets the DBDMA channel to point to it.
+ */
+static int pmac_ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	struct dbdma_cmd *table;
+	volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+	struct scatterlist *sg;
+	int wr = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+	int i = cmd->sg_nents, count = 0;
+
+	/* DMA table is already aligned */
+	table = (struct dbdma_cmd *) pmif->dma_table_cpu;
+
+	/* Make sure DMA controller is stopped (necessary ?) */
+	writel((RUN|PAUSE|FLUSH|WAKE|DEAD) << 16, &dma->control);
+	while (readl(&dma->status) & RUN)
+		udelay(1);
+
+	/* Build DBDMA commands list */
+	sg = hwif->sg_table;
+	while (i && sg_dma_len(sg)) {
+		u32 cur_addr;
+		u32 cur_len;
+
+		cur_addr = sg_dma_address(sg);
+		cur_len = sg_dma_len(sg);
+
+		if (pmif->broken_dma && cur_addr & (L1_CACHE_BYTES - 1)) {
+			if (pmif->broken_dma_warn == 0) {
+				printk(KERN_WARNING "%s: DMA on non aligned address, "
+				       "switching to PIO on Ohare chipset\n", drive->name);
+				pmif->broken_dma_warn = 1;
+			}
+			return 0;
+		}
+		while (cur_len) {
+			unsigned int tc = (cur_len < 0xfe00)? cur_len: 0xfe00;
+
+			if (count++ >= MAX_DCMDS) {
+				printk(KERN_WARNING "%s: DMA table too small\n",
+				       drive->name);
+				return 0;
+			}
+			table->command = cpu_to_le16(wr? OUTPUT_MORE: INPUT_MORE);
+			table->req_count = cpu_to_le16(tc);
+			table->phy_addr = cpu_to_le32(cur_addr);
+			table->cmd_dep = 0;
+			table->xfer_status = 0;
+			table->res_count = 0;
+			cur_addr += tc;
+			cur_len -= tc;
+			++table;
+		}
+		sg = sg_next(sg);
+		i--;
+	}
+
+	/* convert the last command to an input/output last command */
+	if (count) {
+		table[-1].command = cpu_to_le16(wr? OUTPUT_LAST: INPUT_LAST);
+		/* add the stop command to the end of the list */
+		memset(table, 0, sizeof(struct dbdma_cmd));
+		table->command = cpu_to_le16(DBDMA_STOP);
+		mb();
+		writel(hwif->dmatable_dma, &dma->cmdptr);
+		return 1;
+	}
+
+	printk(KERN_DEBUG "%s: empty DMA table?\n", drive->name);
+
+	return 0; /* revert to PIO for this request */
+}
+
+/*
+ * Prepare a DMA transfer. We build the DMA table, adjust the timings for
+ * a read on KeyLargo ATA/66 and mark us as waiting for DMA completion
+ */
+static int pmac_ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	u8 unit = drive->dn & 1, ata4 = (pmif->kind == controller_kl_ata4);
+	u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
+
+	if (pmac_ide_build_dmatable(drive, cmd) == 0)
+		return 1;
+
+	/* Apple adds 60ns to wrDataSetup on reads */
+	if (ata4 && (pmif->timings[unit] & TR_66_UDMA_EN)) {
+		writel(pmif->timings[unit] + (write ? 0 : 0x00800000UL),
+			PMAC_IDE_REG(IDE_TIMING_CONFIG));
+		(void)readl(PMAC_IDE_REG(IDE_TIMING_CONFIG));
+	}
+
+	return 0;
+}
+
+/*
+ * Kick the DMA controller into life after the DMA command has been issued
+ * to the drive.
+ */
+static void
+pmac_ide_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	volatile struct dbdma_regs __iomem *dma;
+
+	dma = pmif->dma_regs;
+
+	writel((RUN << 16) | RUN, &dma->control);
+	/* Make sure it gets to the controller right now */
+	(void)readl(&dma->control);
+}
+
+/*
+ * After a DMA transfer, make sure the controller is stopped
+ */
+static int
+pmac_ide_dma_end (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+	u32 dstat;
+
+	dstat = readl(&dma->status);
+	writel(((RUN|WAKE|DEAD) << 16), &dma->control);
+
+	/* verify good dma status. we don't check for ACTIVE beeing 0. We should...
+	 * in theory, but with ATAPI decices doing buffer underruns, that would
+	 * cause us to disable DMA, which isn't what we want
+	 */
+	return (dstat & (RUN|DEAD)) != RUN;
+}
+
+/*
+ * Check out that the interrupt we got was for us. We can't always know this
+ * for sure with those Apple interfaces (well, we could on the recent ones but
+ * that's not implemented yet), on the other hand, we don't have shared interrupts
+ * so it's not really a problem
+ */
+static int
+pmac_ide_dma_test_irq (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+	unsigned long status, timeout;
+
+	/* We have to things to deal with here:
+	 * 
+	 * - The dbdma won't stop if the command was started
+	 * but completed with an error without transferring all
+	 * datas. This happens when bad blocks are met during
+	 * a multi-block transfer.
+	 * 
+	 * - The dbdma fifo hasn't yet finished flushing to
+	 * to system memory when the disk interrupt occurs.
+	 * 
+	 */
+
+	/* If ACTIVE is cleared, the STOP command have passed and
+	 * transfer is complete.
+	 */
+	status = readl(&dma->status);
+	if (!(status & ACTIVE))
+		return 1;
+
+	/* If dbdma didn't execute the STOP command yet, the
+	 * active bit is still set. We consider that we aren't
+	 * sharing interrupts (which is hopefully the case with
+	 * those controllers) and so we just try to flush the
+	 * channel for pending data in the fifo
+	 */
+	udelay(1);
+	writel((FLUSH << 16) | FLUSH, &dma->control);
+	timeout = 0;
+	for (;;) {
+		udelay(1);
+		status = readl(&dma->status);
+		if ((status & FLUSH) == 0)
+			break;
+		if (++timeout > 100) {
+			printk(KERN_WARNING "ide%d, ide_dma_test_irq timeout flushing channel\n",
+			       hwif->index);
+			break;
+		}
+	}	
+	return 1;
+}
+
+static void pmac_ide_dma_host_set(ide_drive_t *drive, int on)
+{
+}
+
+static void
+pmac_ide_dma_lost_irq (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
+	unsigned long status = readl(&dma->status);
+
+	printk(KERN_ERR "ide-pmac lost interrupt, dma status: %lx\n", status);
+}
+
+static const struct ide_dma_ops pmac_dma_ops = {
+	.dma_host_set		= pmac_ide_dma_host_set,
+	.dma_setup		= pmac_ide_dma_setup,
+	.dma_start		= pmac_ide_dma_start,
+	.dma_end		= pmac_ide_dma_end,
+	.dma_test_irq		= pmac_ide_dma_test_irq,
+	.dma_lost_irq		= pmac_ide_dma_lost_irq,
+};
+
+/*
+ * Allocate the data structures needed for using DMA with an interface
+ * and fill the proper list of functions pointers
+ */
+static int pmac_ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	pmac_ide_hwif_t *pmif = dev_get_drvdata(hwif->gendev.parent);
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	/* We won't need pci_dev if we switch to generic consistent
+	 * DMA routines ...
+	 */
+	if (dev == NULL || pmif->dma_regs == 0)
+		return -ENODEV;
+	/*
+	 * Allocate space for the DBDMA commands.
+	 * The +2 is +1 for the stop command and +1 to allow for
+	 * aligning the start address to a multiple of 16 bytes.
+	 */
+	pmif->dma_table_cpu = dma_alloc_coherent(&dev->dev,
+		(MAX_DCMDS + 2) * sizeof(struct dbdma_cmd),
+		&hwif->dmatable_dma, GFP_KERNEL);
+	if (pmif->dma_table_cpu == NULL) {
+		printk(KERN_ERR "%s: unable to allocate DMA command list\n",
+		       hwif->name);
+		return -ENOMEM;
+	}
+
+	hwif->sg_max_nents = MAX_DCMDS;
+
+	return 0;
+}
+
+module_init(pmac_ide_probe);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/q40ide.c b/drivers/ide/q40ide.c
new file mode 100644
index 000000000..ecd0a6924
--- /dev/null
+++ b/drivers/ide/q40ide.c
@@ -0,0 +1,168 @@
+/*
+ *  Q40 I/O port IDE Driver
+ *
+ *     (c) Richard Zidlicky
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ *
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/module.h>
+
+#include <asm/ide.h>
+
+    /*
+     *  Bases of the IDE interfaces
+     */
+
+#define Q40IDE_NUM_HWIFS	2
+
+#define PCIDE_BASE1	0x1f0
+#define PCIDE_BASE2	0x170
+#define PCIDE_BASE3	0x1e8
+#define PCIDE_BASE4	0x168
+#define PCIDE_BASE5	0x1e0
+#define PCIDE_BASE6	0x160
+
+static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
+    PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4  , PCIDE_BASE5,
+    PCIDE_BASE6 */
+};
+
+static int q40ide_default_irq(unsigned long base)
+{
+           switch (base) {
+	            case 0x1f0: return 14;
+		    case 0x170: return 15;
+		    case 0x1e8: return 11;
+		    default:
+			return 0;
+	   }
+}
+
+
+/*
+ * Addresses are pretranslated for Q40 ISA access.
+ */
+static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base, int irq)
+{
+	memset(hw, 0, sizeof(*hw));
+	/* BIG FAT WARNING: 
+	   assumption: only DATA port is ever used in 16 bit mode */
+	hw->io_ports.data_addr = Q40_ISA_IO_W(base);
+	hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1);
+	hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2);
+	hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3);
+	hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4);
+	hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5);
+	hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6);
+	hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7);
+	hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
+
+	hw->irq = irq;
+}
+
+static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
+			      void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_insw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+static void q40ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
+			       void *buf, unsigned int len)
+{
+	unsigned long data_addr = drive->hwif->io_ports.data_addr;
+
+	if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
+		__ide_mm_outsw(data_addr, buf, (len + 1) / 2);
+		return;
+	}
+
+	raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
+}
+
+/* Q40 has a byte-swapped IDE interface */
+static const struct ide_tp_ops q40ide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= q40ide_input_data,
+	.output_data		= q40ide_output_data,
+};
+
+static const struct ide_port_info q40ide_port_info = {
+	.tp_ops			= &q40ide_tp_ops,
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.irq_flags		= IRQF_SHARED,
+	.chipset		= ide_generic,
+};
+
+/* 
+ * the static array is needed to have the name reported in /proc/ioports,
+ * hwif->name unfortunately isn't available yet
+ */
+static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
+	"ide0", "ide1"
+};
+
+/*
+ *  Probe for Q40 IDE interfaces
+ */
+
+static int __init q40ide_init(void)
+{
+    int i;
+    struct ide_hw hw[Q40IDE_NUM_HWIFS], *hws[] = { NULL, NULL };
+
+    if (!MACH_IS_Q40)
+      return -ENODEV;
+
+    printk(KERN_INFO "ide: Q40 IDE controller\n");
+
+    for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
+	const char *name = q40_ide_names[i];
+
+	if (!request_region(pcide_bases[i], 8, name)) {
+		printk("could not reserve ports %lx-%lx for %s\n",
+		       pcide_bases[i],pcide_bases[i]+8,name);
+		continue;
+	}
+	if (!request_region(pcide_bases[i]+0x206, 1, name)) {
+		printk("could not reserve port %lx for %s\n",
+		       pcide_bases[i]+0x206,name);
+		release_region(pcide_bases[i], 8);
+		continue;
+	}
+	q40_ide_setup_ports(&hw[i], pcide_bases[i],
+			q40ide_default_irq(pcide_bases[i]));
+
+	hws[i] = &hw[i];
+    }
+
+    return ide_host_add(&q40ide_port_info, hws, Q40IDE_NUM_HWIFS, NULL);
+}
+
+module_init(q40ide_init);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/qd65xx.c b/drivers/ide/qd65xx.c
new file mode 100644
index 000000000..ab79b6289
--- /dev/null
+++ b/drivers/ide/qd65xx.c
@@ -0,0 +1,446 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1996-2001  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Version 0.03	Cleaned auto-tune, added probe
+ *  Version 0.04	Added second channel tuning
+ *  Version 0.05	Enhanced tuning ; added qd6500 support
+ *  Version 0.06	Added dos driver's list
+ *  Version 0.07	Second channel bug fix 
+ *
+ * QDI QD6500/QD6580 EIDE controller fast support
+ *
+ * To activate controller support, use "ide0=qd65xx"
+ */
+
+/*
+ * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
+ * Samuel Thibault <samuel.thibault@ens-lyon.org>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <asm/io.h>
+
+#define DRV_NAME "qd65xx"
+
+#include "qd65xx.h"
+
+/*
+ * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
+ *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
+ *	-- qd6500 is a single IDE interface
+ *	-- qd6580 is a dual IDE interface
+ *
+ * More research on qd6580 being done by willmore@cig.mot.com (David)
+ * More Information given by Petr Soucek (petr@ryston.cz)
+ * http://www.ryston.cz/petr/vlb
+ */
+
+/*
+ * base: Timer1
+ *
+ *
+ * base+0x01: Config (R/O)
+ *
+ * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
+ * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
+ * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
+ * bit 3: qd6500: 1 = disabled, 0 = enabled
+ *        qd6580: 1
+ * upper nibble:
+ *        qd6500: 1100
+ *        qd6580: either 1010 or 0101
+ *
+ *
+ * base+0x02: Timer2 (qd6580 only)
+ *
+ *
+ * base+0x03: Control (qd6580 only)
+ *
+ * bits 0-3 must always be set 1
+ * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
+ * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
+ *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
+ *                                                   channel 1 for hdc & hdd
+ * bit 1 : 1 = only disks on primary port
+ *         0 = disks & ATAPI devices on primary port
+ * bit 2-4 : always 0
+ * bit 5 : status, but of what ?
+ * bit 6 : always set 1 by dos driver
+ * bit 7 : set 1 for non-ATAPI devices on primary port
+ *	(maybe read-ahead and post-write buffer ?)
+ */
+
+static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
+
+/*
+ * qd65xx_select:
+ *
+ * This routine is invoked to prepare for access to a given drive.
+ */
+
+static void qd65xx_dev_select(ide_drive_t *drive)
+{
+	u8 index = ((	(QD_TIMREG(drive)) & 0x80 ) >> 7) |
+			(QD_TIMREG(drive) & 0x02);
+
+	if (timings[index] != QD_TIMING(drive))
+		outb(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
+
+	outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
+}
+
+/*
+ * qd6500_compute_timing
+ *
+ * computes the timing value where
+ *	lower nibble represents active time,   in count of VLB clocks
+ *	upper nibble represents recovery time, in count of VLB clocks
+ */
+
+static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
+{
+	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
+	u8 act_cyc, rec_cyc;
+
+	if (clk <= 33) {
+		act_cyc =  9 - IDE_IN(active_time   * clk / 1000 + 1, 2,  9);
+		rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
+	} else {
+		act_cyc =  8 - IDE_IN(active_time   * clk / 1000 + 1, 1,  8);
+		rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
+	}
+
+	return (rec_cyc << 4) | 0x08 | act_cyc;
+}
+
+/*
+ * qd6580_compute_timing
+ *
+ * idem for qd6580
+ */
+
+static u8 qd6580_compute_timing (int active_time, int recovery_time)
+{
+	int clk = ide_vlb_clk ? ide_vlb_clk : 50;
+	u8 act_cyc, rec_cyc;
+
+	act_cyc = 17 - IDE_IN(active_time   * clk / 1000 + 1, 2, 17);
+	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
+
+	return (rec_cyc << 4) | act_cyc;
+}
+
+/*
+ * qd_find_disk_type
+ *
+ * tries to find timing from dos driver's table
+ */
+
+static int qd_find_disk_type (ide_drive_t *drive,
+		int *active_time, int *recovery_time)
+{
+	struct qd65xx_timing_s *p;
+	char *m = (char *)&drive->id[ATA_ID_PROD];
+	char model[ATA_ID_PROD_LEN];
+
+	if (*m == 0)
+		return 0;
+
+	strncpy(model, m, ATA_ID_PROD_LEN);
+	ide_fixstring(model, ATA_ID_PROD_LEN, 1); /* byte-swap */
+
+	for (p = qd65xx_timing ; p->offset != -1 ; p++) {
+		if (!strncmp(p->model, model+p->offset, 4)) {
+			printk(KERN_DEBUG "%s: listed !\n", drive->name);
+			*active_time = p->active;
+			*recovery_time = p->recovery;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * qd_set_timing:
+ *
+ * records the timing
+ */
+
+static void qd_set_timing (ide_drive_t *drive, u8 timing)
+{
+	unsigned long data = (unsigned long)ide_get_drivedata(drive);
+
+	data &= 0xff00;
+	data |= timing;
+	ide_set_drivedata(drive, (void *)data);
+
+	printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
+}
+
+static void qd6500_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	u16 *id = drive->id;
+	int active_time   = 175;
+	int recovery_time = 415; /* worst case values from the dos driver */
+
+	/* FIXME: use drive->pio_mode value */
+	if (!qd_find_disk_type(drive, &active_time, &recovery_time) &&
+	    (id[ATA_ID_OLD_PIO_MODES] & 0xff) && (id[ATA_ID_FIELD_VALID] & 2) &&
+	    id[ATA_ID_EIDE_PIO] >= 240) {
+		printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
+			id[ATA_ID_OLD_PIO_MODES] & 0xff);
+		active_time = 110;
+		recovery_time = drive->id[ATA_ID_EIDE_PIO] - 120;
+	}
+
+	qd_set_timing(drive, qd6500_compute_timing(drive->hwif,
+				active_time, recovery_time));
+}
+
+static void qd6580_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+	unsigned int cycle_time;
+	int active_time   = 175;
+	int recovery_time = 415; /* worst case values from the dos driver */
+	u8 base = (hwif->config_data & 0xff00) >> 8;
+
+	if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
+		cycle_time = ide_pio_cycle_time(drive, pio);
+
+		switch (pio) {
+			case 0: break;
+			case 3:
+				if (cycle_time >= 110) {
+					active_time = 86;
+					recovery_time = cycle_time - 102;
+				} else
+					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+				break;
+			case 4:
+				if (cycle_time >= 69) {
+					active_time = 70;
+					recovery_time = cycle_time - 61;
+				} else
+					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+				break;
+			default:
+				if (cycle_time >= 180) {
+					active_time = 110;
+					recovery_time = cycle_time - 120;
+				} else {
+					active_time = t->active;
+					recovery_time = cycle_time - active_time;
+				}
+		}
+		printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
+	}
+
+	if (!hwif->channel && drive->media != ide_disk) {
+		outb(0x5f, QD_CONTROL_PORT);
+		printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
+			"and post-write buffer on %s.\n",
+			drive->name, hwif->name);
+	}
+
+	qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
+}
+
+/*
+ * qd_testreg
+ *
+ * tests if the given port is a register
+ */
+
+static int __init qd_testreg(int port)
+{
+	unsigned long flags;
+	u8 savereg, readreg;
+
+	local_irq_save(flags);
+	savereg = inb_p(port);
+	outb_p(QD_TESTVAL, port);	/* safe value */
+	readreg = inb_p(port);
+	outb(savereg, port);
+	local_irq_restore(flags);
+
+	if (savereg == QD_TESTVAL) {
+		printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
+		printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
+		printk(KERN_ERR "Assuming qd65xx is not present.\n");
+		return 1;
+	}
+
+	return (readreg != QD_TESTVAL);
+}
+
+static void __init qd6500_init_dev(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 base = (hwif->config_data & 0xff00) >> 8;
+	u8 config = QD_CONFIG(hwif);
+
+	ide_set_drivedata(drive, (void *)QD6500_DEF_DATA);
+}
+
+static void __init qd6580_init_dev(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long t1, t2;
+	u8 base = (hwif->config_data & 0xff00) >> 8;
+	u8 config = QD_CONFIG(hwif);
+
+	if (hwif->host_flags & IDE_HFLAG_SINGLE) {
+		t1 = QD6580_DEF_DATA;
+		t2 = QD6580_DEF_DATA2;
+	} else
+		t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
+
+	ide_set_drivedata(drive, (void *)((drive->dn & 1) ? t2 : t1));
+}
+
+static const struct ide_tp_ops qd65xx_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= qd65xx_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_port_ops qd6500_port_ops = {
+	.init_dev		= qd6500_init_dev,
+	.set_pio_mode		= qd6500_set_pio_mode,
+};
+
+static const struct ide_port_ops qd6580_port_ops = {
+	.init_dev		= qd6580_init_dev,
+	.set_pio_mode		= qd6580_set_pio_mode,
+};
+
+static const struct ide_port_info qd65xx_port_info __initconst = {
+	.name			= DRV_NAME,
+	.tp_ops 		= &qd65xx_tp_ops,
+	.chipset		= ide_qd65xx,
+	.host_flags		= IDE_HFLAG_IO_32BIT |
+				  IDE_HFLAG_NO_DMA,
+	.pio_mask		= ATA_PIO4,
+};
+
+/*
+ * qd_probe:
+ *
+ * looks at the specified baseport, and if qd found, registers & initialises it
+ * return 1 if another qd may be probed
+ */
+
+static int __init qd_probe(int base)
+{
+	int rc;
+	u8 config, unit, control;
+	struct ide_port_info d = qd65xx_port_info;
+
+	config = inb(QD_CONFIG_PORT);
+
+	if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
+		return -ENODEV;
+
+	unit = ! (config & QD_CONFIG_IDE_BASEPORT);
+
+	if (unit)
+		d.host_flags |= IDE_HFLAG_QD_2ND_PORT;
+
+	switch (config & 0xf0) {
+	case QD_CONFIG_QD6500:
+		if (qd_testreg(base))
+			 return -ENODEV;	/* bad register */
+
+		if (config & QD_CONFIG_DISABLED) {
+			printk(KERN_WARNING "qd6500 is disabled !\n");
+			return -ENODEV;
+		}
+
+		printk(KERN_NOTICE "qd6500 at %#x\n", base);
+		printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
+			config, QD_ID3);
+
+		d.port_ops = &qd6500_port_ops;
+		d.host_flags |= IDE_HFLAG_SINGLE;
+		break;
+	case QD_CONFIG_QD6580_A:
+	case QD_CONFIG_QD6580_B:
+		if (qd_testreg(base) || qd_testreg(base + 0x02))
+			return -ENODEV;	/* bad registers */
+
+		control = inb(QD_CONTROL_PORT);
+
+		printk(KERN_NOTICE "qd6580 at %#x\n", base);
+		printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
+			config, control, QD_ID3);
+
+		outb(QD_DEF_CONTR, QD_CONTROL_PORT);
+
+		d.port_ops = &qd6580_port_ops;
+		if (control & QD_CONTR_SEC_DISABLED)
+			d.host_flags |= IDE_HFLAG_SINGLE;
+
+		printk(KERN_INFO "qd6580: %s IDE board\n",
+			(control & QD_CONTR_SEC_DISABLED) ? "single" : "dual");
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	rc = ide_legacy_device_add(&d, (base << 8) | config);
+
+	if (d.host_flags & IDE_HFLAG_SINGLE)
+		return (rc == 0) ? 1 : rc;
+
+	return rc;
+}
+
+static bool probe_qd65xx;
+
+module_param_named(probe, probe_qd65xx, bool, 0);
+MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
+
+static int __init qd65xx_init(void)
+{
+	int rc1, rc2 = -ENODEV;
+
+	if (probe_qd65xx == 0)
+		return -ENODEV;
+
+	rc1 = qd_probe(0x30);
+	if (rc1)
+		rc2 = qd_probe(0xb0);
+
+	if (rc1 < 0 && rc2 < 0)
+		return -ENODEV;
+
+	return 0;
+}
+
+module_init(qd65xx_init);
+
+MODULE_AUTHOR("Samuel Thibault");
+MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/qd65xx.h b/drivers/ide/qd65xx.h
new file mode 100644
index 000000000..01a43ab45
--- /dev/null
+++ b/drivers/ide/qd65xx.h
@@ -0,0 +1,145 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2000	Linus Torvalds & authors
+ */
+
+/*
+ * Authors:	Petr Soucek <petr@ryston.cz>
+ * 		Samuel Thibault <samuel.thibault@ens-lyon.org>
+ */
+
+/* truncates a in [b,c] */
+#define IDE_IN(a,b,c)   ( ((a)<(b)) ? (b) : ( (a)>(c) ? (c) : (a)) )
+
+#define IDE_IMPLY(a,b)	((!(a)) || (b))
+
+#define QD_TIM1_PORT		(base)
+#define QD_CONFIG_PORT		(base+0x01)
+#define QD_TIM2_PORT		(base+0x02)
+#define QD_CONTROL_PORT		(base+0x03)
+
+#define QD_CONFIG_IDE_BASEPORT	0x01
+#define QD_CONFIG_BASEPORT	0x02
+#define QD_CONFIG_ID3		0x04
+#define QD_CONFIG_DISABLED	0x08
+#define QD_CONFIG_QD6500	0xc0
+#define QD_CONFIG_QD6580_A	0xa0
+#define QD_CONFIG_QD6580_B	0x50
+
+#define QD_CONTR_SEC_DISABLED	0x01
+
+#define QD_ID3			((config & QD_CONFIG_ID3)!=0)
+
+#define QD_CONFIG(hwif)		((hwif)->config_data & 0x00ff)
+
+static inline u8 QD_TIMING(ide_drive_t *drive)
+{
+	return (unsigned long)ide_get_drivedata(drive) & 0x00ff;
+}
+
+static inline u8 QD_TIMREG(ide_drive_t *drive)
+{
+	return ((unsigned long)ide_get_drivedata(drive) & 0xff00) >> 8;
+}
+
+#define QD6500_DEF_DATA		((QD_TIM1_PORT<<8) | (QD_ID3 ? 0x0c : 0x08))
+#define QD6580_DEF_DATA		((QD_TIM1_PORT<<8) | (QD_ID3 ? 0x0a : 0x00))
+#define QD6580_DEF_DATA2	((QD_TIM2_PORT<<8) | (QD_ID3 ? 0x0a : 0x00))
+#define QD_DEF_CONTR		(0x40 | ((control & 0x02) ? 0x9f : 0x1f))
+
+#define QD_TESTVAL		0x19	/* safe value */
+
+/* Drive specific timing taken from DOS driver v3.7 */
+
+static struct qd65xx_timing_s {
+	s8	offset;   /* ofset from the beginning of Model Number" */
+	char	model[4];    /* 4 chars from Model number, no conversion */
+	s16	active;   /* active time */
+	s16	recovery; /* recovery time */
+} qd65xx_timing [] = {
+	{ 30, "2040", 110, 225 },  /* Conner CP30204			*/
+	{ 30, "2045", 135, 225 },  /* Conner CP30254			*/
+	{ 30, "1040", 155, 325 },  /* Conner CP30104			*/
+	{ 30, "1047", 135, 265 },  /* Conner CP30174			*/
+	{ 30, "5344", 135, 225 },  /* Conner CP3544			*/
+	{ 30, "01 4", 175, 405 },  /* Conner CP-3104			*/
+	{ 27, "C030", 175, 375 },  /* Conner CP3000			*/
+	{  8, "PL42", 110, 295 },  /* Quantum LP240			*/
+	{  8, "PL21", 110, 315 },  /* Quantum LP120			*/
+	{  8, "PL25", 175, 385 },  /* Quantum LP52			*/
+	{  4, "PA24", 110, 285 },  /* WD Piranha SP4200			*/
+	{  6, "2200", 110, 260 },  /* WD Caviar AC2200			*/
+	{  6, "3204", 110, 235 },  /* WD Caviar AC2340			*/
+	{  6, "1202", 110, 265 },  /* WD Caviar AC2120			*/
+	{  0, "DS3-", 135, 315 },  /* Teac SD340			*/
+	{  8, "KM32", 175, 355 },  /* Toshiba MK234			*/
+	{  2, "53A1", 175, 355 },  /* Seagate ST351A			*/
+	{  2, "4108", 175, 295 },  /* Seagate ST1480A			*/
+	{  2, "1344", 175, 335 },  /* Seagate ST3144A			*/
+	{  6, "7 12", 110, 225 },  /* Maxtor 7213A			*/
+	{ 30, "02F4", 145, 295 },  /* Conner 3204F			*/
+	{  2, "1302", 175, 335 },  /* Seagate ST3120A			*/
+	{  2, "2334", 145, 265 },  /* Seagate ST3243A			*/
+	{  2, "2338", 145, 275 },  /* Seagate ST3283A			*/
+	{  2, "3309", 145, 275 },  /* Seagate ST3390A			*/
+	{  2, "5305", 145, 275 },  /* Seagate ST3550A			*/
+	{  2, "4100", 175, 295 },  /* Seagate ST1400A			*/
+	{  2, "4110", 175, 295 },  /* Seagate ST1401A			*/
+	{  2, "6300", 135, 265 },  /* Seagate ST3600A			*/
+	{  2, "5300", 135, 265 },  /* Seagate ST3500A			*/
+	{  6, "7 31", 135, 225 },  /* Maxtor 7131 AT			*/
+	{  6, "7 43", 115, 265 },  /* Maxtor 7345 AT			*/
+	{  6, "7 42", 110, 255 },  /* Maxtor 7245 AT			*/
+	{  6, "3 04", 135, 265 },  /* Maxtor 340 AT			*/
+	{  6, "61 0", 135, 285 },  /* WD AC160				*/
+	{  6, "1107", 135, 235 },  /* WD AC1170				*/
+	{  6, "2101", 110, 220 },  /* WD AC1210				*/
+	{  6, "4202", 135, 245 },  /* WD AC2420				*/
+	{  6, "41 0", 175, 355 },  /* WD Caviar 140			*/
+	{  6, "82 0", 175, 355 },  /* WD Caviar 280			*/
+	{  8, "PL01", 175, 375 },  /* Quantum LP105			*/
+	{  8, "PL25", 110, 295 },  /* Quantum LP525			*/
+	{ 10, "4S 2", 175, 385 },  /* Quantum ELS42			*/
+	{ 10, "8S 5", 175, 385 },  /* Quantum ELS85			*/
+	{ 10, "1S72", 175, 385 },  /* Quantum ELS127			*/
+	{ 10, "1S07", 175, 385 },  /* Quantum ELS170			*/
+	{  8, "ZE42", 135, 295 },  /* Quantum EZ240			*/
+	{  8, "ZE21", 175, 385 },  /* Quantum EZ127			*/
+	{  8, "ZE58", 175, 385 },  /* Quantum EZ85			*/
+	{  8, "ZE24", 175, 385 },  /* Quantum EZ42			*/
+	{ 27, "C036", 155, 325 },  /* Conner CP30064			*/
+	{ 27, "C038", 155, 325 },  /* Conner CP30084			*/
+	{  6, "2205", 110, 255 },  /* WDC AC2250			*/
+	{  2, " CHA", 140, 415 },  /* WDC AH series; WDC AH260, WDC	*/
+	{  2, " CLA", 140, 415 },  /* WDC AL series: WDC AL2120, 2170,	*/
+	{  4, "UC41", 140, 415 },  /* WDC CU140				*/
+	{  6, "1207", 130, 275 },  /* WDC AC2170			*/
+	{  6, "2107", 130, 275 },  /* WDC AC1270			*/
+	{  6, "5204", 130, 275 },  /* WDC AC2540			*/
+	{ 30, "3004", 110, 235 },  /* Conner CP30340			*/
+	{ 30, "0345", 135, 255 },  /* Conner CP30544			*/
+	{ 12, "12A3", 175, 320 },  /* MAXTOR LXT-213A			*/
+	{ 12, "43A0", 145, 240 },  /* MAXTOR LXT-340A			*/
+	{  6, "7 21", 180, 290 },  /* Maxtor 7120 AT			*/
+	{  6, "7 71", 135, 240 },  /* Maxtor 7170 AT			*/
+	{ 12, "45\0000", 110, 205 },   /* MAXTOR MXT-540		*/
+	{  8, "PL11", 180, 290 },  /* QUANTUM LP110A			*/
+	{  8, "OG21", 150, 275 },  /* QUANTUM GO120			*/
+	{ 12, "42A5", 175, 320 },  /* MAXTOR LXT-245A			*/
+	{  2, "2309", 175, 295 },  /* ST3290A				*/
+	{  2, "3358", 180, 310 },  /* ST3385A				*/
+	{  2, "6355", 180, 310 },  /* ST3655A				*/
+	{  2, "1900", 175, 270 },  /* ST9100A				*/
+	{  2, "1954", 175, 270 },  /* ST9145A				*/
+	{  2, "1909", 175, 270 },  /* ST9190AG				*/
+	{  2, "2953", 175, 270 },  /* ST9235A				*/
+	{  2, "1359", 175, 270 },  /* ST3195A				*/
+	{ 24, "3R11", 175, 290 },  /* ALPS ELECTRIC Co.,LTD, DR311C	*/
+	{  0, "2M26", 175, 215 },  /* M262XT-0Ah			*/
+	{  4, "2253", 175, 300 },  /* HP C2235A				*/
+	{  4, "-32A", 145, 245 },  /* H3133-A2				*/
+	{ 30, "0326", 150, 270 },  /* Samsung Electronics 120MB		*/
+	{ 30, "3044", 110, 195 },  /* Conner CFA340A			*/
+	{ 30, "43A0", 110, 195 },  /* Conner CFA340A			*/
+	{ -1, "    ", 175, 415 }   /* unknown disk name			*/
+};
diff --git a/drivers/ide/rapide.c b/drivers/ide/rapide.c
new file mode 100644
index 000000000..0ab8b86b7
--- /dev/null
+++ b/drivers/ide/rapide.c
@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 1996-2002 Russell King.
+ */
+
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/ecard.h>
+
+static const struct ide_port_info rapide_port_info = {
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.chipset		= ide_generic,
+};
+
+static void rapide_setup_ports(struct ide_hw *hw, void __iomem *base,
+			       void __iomem *ctrl, unsigned int sz, int irq)
+{
+	unsigned long port = (unsigned long)base;
+	int i;
+
+	for (i = 0; i <= 7; i++) {
+		hw->io_ports_array[i] = port;
+		port += sz;
+	}
+	hw->io_ports.ctl_addr = (unsigned long)ctrl;
+	hw->irq = irq;
+}
+
+static int rapide_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+	void __iomem *base;
+	struct ide_host *host;
+	int ret;
+	struct ide_hw hw, *hws[] = { &hw };
+
+	ret = ecard_request_resources(ec);
+	if (ret)
+		goto out;
+
+	base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+	if (!base) {
+		ret = -ENOMEM;
+		goto release;
+	}
+
+	memset(&hw, 0, sizeof(hw));
+	rapide_setup_ports(&hw, base, base + 0x818, 1 << 6, ec->irq);
+	hw.dev = &ec->dev;
+
+	ret = ide_host_add(&rapide_port_info, hws, 1, &host);
+	if (ret)
+		goto release;
+
+	ecard_set_drvdata(ec, host);
+	goto out;
+
+ release:
+	ecard_release_resources(ec);
+ out:
+	return ret;
+}
+
+static void rapide_remove(struct expansion_card *ec)
+{
+	struct ide_host *host = ecard_get_drvdata(ec);
+
+	ecard_set_drvdata(ec, NULL);
+
+	ide_host_remove(host);
+
+	ecard_release_resources(ec);
+}
+
+static struct ecard_id rapide_ids[] = {
+	{ MANU_YELLOWSTONE, PROD_YELLOWSTONE_RAPIDE32 },
+	{ 0xffff, 0xffff }
+};
+
+static struct ecard_driver rapide_driver = {
+	.probe		= rapide_probe,
+	.remove		= rapide_remove,
+	.id_table	= rapide_ids,
+	.drv = {
+		.name	= "rapide",
+	},
+};
+
+static int __init rapide_init(void)
+{
+	return ecard_register_driver(&rapide_driver);
+}
+
+static void __exit rapide_exit(void)
+{
+	ecard_remove_driver(&rapide_driver);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Yellowstone RAPIDE driver");
+
+module_init(rapide_init);
+module_exit(rapide_exit);
diff --git a/drivers/ide/rz1000.c b/drivers/ide/rz1000.c
new file mode 100644
index 000000000..fce2b7de5
--- /dev/null
+++ b/drivers/ide/rz1000.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1995-1998  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Principal Author:  mlord@pobox.com (Mark Lord)
+ *
+ *  See linux/MAINTAINERS for address of current maintainer.
+ *
+ *  This file provides support for disabling the buggy read-ahead
+ *  mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
+ *
+ *  Dunno if this fixes both ports, or only the primary port (?).
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "rz1000"
+
+static int rz1000_disable_readahead(struct pci_dev *dev)
+{
+	u16 reg;
+
+	if (!pci_read_config_word (dev, 0x40, &reg) &&
+	    !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
+		printk(KERN_INFO "%s: disabled chipset read-ahead "
+			"(buggy RZ1000/RZ1001)\n", pci_name(dev));
+		return 0;
+	} else {
+		printk(KERN_INFO "%s: serialized, disabled unmasking "
+			"(buggy RZ1000/RZ1001)\n", pci_name(dev));
+		return 1;
+	}
+}
+
+static const struct ide_port_info rz1000_chipset = {
+	.name		= DRV_NAME,
+	.host_flags	= IDE_HFLAG_NO_DMA,
+};
+
+static int rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d = rz1000_chipset;
+	int rc;
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	if (rz1000_disable_readahead(dev)) {
+		d.host_flags |= IDE_HFLAG_SERIALIZE;
+		d.host_flags |= IDE_HFLAG_NO_UNMASK_IRQS;
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static void rz1000_remove(struct pci_dev *dev)
+{
+	ide_pci_remove(dev);
+	pci_disable_device(dev);
+}
+
+static const struct pci_device_id rz1000_pci_tbl[] = {
+	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
+	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
+
+static struct pci_driver rz1000_pci_driver = {
+	.name		= "RZ1000_IDE",
+	.id_table	= rz1000_pci_tbl,
+	.probe		= rz1000_init_one,
+	.remove		= rz1000_remove,
+};
+
+static int __init rz1000_ide_init(void)
+{
+	return ide_pci_register_driver(&rz1000_pci_driver);
+}
+
+static void __exit rz1000_ide_exit(void)
+{
+	pci_unregister_driver(&rz1000_pci_driver);
+}
+
+module_init(rz1000_ide_init);
+module_exit(rz1000_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/ide/sc1200.c b/drivers/ide/sc1200.c
new file mode 100644
index 000000000..a5b701818
--- /dev/null
+++ b/drivers/ide/sc1200.c
@@ -0,0 +1,355 @@
+/*
+ * Copyright (C) 2000-2002		Mark Lord <mlord@pobox.com>
+ * Copyright (C)      2007		Bartlomiej Zolnierkiewicz
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ *
+ * Development of this chipset driver was funded
+ * by the nice folks at National Semiconductor.
+ *
+ * Documentation:
+ *	Available from National Semiconductor
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <linux/pm.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "sc1200"
+
+#define SC1200_REV_A	0x00
+#define SC1200_REV_B1	0x01
+#define SC1200_REV_B3	0x02
+#define SC1200_REV_C1	0x03
+#define SC1200_REV_D1	0x04
+
+#define PCI_CLK_33	0x00
+#define PCI_CLK_48	0x01
+#define PCI_CLK_66	0x02
+#define PCI_CLK_33A	0x03
+
+static unsigned short sc1200_get_pci_clock (void)
+{
+	unsigned char chip_id, silicon_revision;
+	unsigned int pci_clock;
+	/*
+	 * Check the silicon revision, as not all versions of the chip
+	 * have the register with the fast PCI bus timings.
+	 */
+	chip_id = inb (0x903c);
+	silicon_revision = inb (0x903d);
+
+	// Read the fast pci clock frequency
+	if (chip_id == 0x04 && silicon_revision < SC1200_REV_B1) {
+		pci_clock = PCI_CLK_33;
+	} else {
+		// check clock generator configuration (cfcc)
+		// the clock is in bits 8 and 9 of this word
+
+		pci_clock = inw (0x901e);
+		pci_clock >>= 8;
+		pci_clock &= 0x03;
+		if (pci_clock == PCI_CLK_33A)
+			pci_clock = PCI_CLK_33;
+	}
+	return pci_clock;
+}
+
+/*
+ * Here are the standard PIO mode 0-4 timings for each "format".
+ * Format-0 uses fast data reg timings, with slower command reg timings.
+ * Format-1 uses fast timings for all registers, but won't work with all drives.
+ */
+static const unsigned int sc1200_pio_timings[4][5] =
+	{{0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},	// format0  33Mhz
+	 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010},	// format1, 33Mhz
+	 {0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021},	// format1, 48Mhz
+	 {0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131}};	// format1, 66Mhz
+
+/*
+ * After chip reset, the PIO timings are set to 0x00009172, which is not valid.
+ */
+//#define SC1200_BAD_PIO(timings) (((timings)&~0x80000000)==0x00009172)
+
+static void sc1200_tunepio(ide_drive_t *drive, u8 pio)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	unsigned int basereg = hwif->channel ? 0x50 : 0x40, format = 0;
+
+	pci_read_config_dword(pdev, basereg + 4, &format);
+	format = (format >> 31) & 1;
+	if (format)
+		format += sc1200_get_pci_clock();
+	pci_write_config_dword(pdev, basereg + ((drive->dn & 1) << 3),
+			       sc1200_pio_timings[format][pio]);
+}
+
+/*
+ *	The SC1200 specifies that two drives sharing a cable cannot mix
+ *	UDMA/MDMA.  It has to be one or the other, for the pair, though
+ *	different timings can still be chosen for each drive.  We could
+ *	set the appropriate timing bits on the fly, but that might be
+ *	a bit confusing.  So, for now we statically handle this requirement
+ *	by looking at our mate drive to see what it is capable of, before
+ *	choosing a mode for our own drive.
+ */
+static u8 sc1200_udma_filter(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	ide_drive_t *mate = ide_get_pair_dev(drive);
+	u16 *mateid;
+	u8 mask = hwif->ultra_mask;
+
+	if (mate == NULL)
+		goto out;
+	mateid = mate->id;
+
+	if (ata_id_has_dma(mateid) && __ide_dma_bad_drive(mate) == 0) {
+		if ((mateid[ATA_ID_FIELD_VALID] & 4) &&
+		    (mateid[ATA_ID_UDMA_MODES] & 7))
+			goto out;
+		if (mateid[ATA_ID_MWDMA_MODES] & 7)
+			mask = 0;
+	}
+out:
+	return mask;
+}
+
+static void sc1200_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev		*dev = to_pci_dev(hwif->dev);
+	unsigned int		reg, timings;
+	unsigned short		pci_clock;
+	unsigned int		basereg = hwif->channel ? 0x50 : 0x40;
+	const u8		mode = drive->dma_mode;
+
+	static const u32 udma_timing[3][3] = {
+		{ 0x00921250, 0x00911140, 0x00911030 },
+		{ 0x00932470, 0x00922260, 0x00922140 },
+		{ 0x009436a1, 0x00933481, 0x00923261 },
+	};
+
+	static const u32 mwdma_timing[3][3] = {
+		{ 0x00077771, 0x00012121, 0x00002020 },
+		{ 0x000bbbb2, 0x00024241, 0x00013131 },
+		{ 0x000ffff3, 0x00035352, 0x00015151 },
+	};
+
+	pci_clock = sc1200_get_pci_clock();
+
+	/*
+	 * Note that each DMA mode has several timings associated with it.
+	 * The correct timing depends on the fast PCI clock freq.
+	 */
+
+	if (mode >= XFER_UDMA_0)
+		timings =  udma_timing[pci_clock][mode - XFER_UDMA_0];
+	else
+		timings = mwdma_timing[pci_clock][mode - XFER_MW_DMA_0];
+
+	if ((drive->dn & 1) == 0) {
+		pci_read_config_dword(dev, basereg + 4, &reg);
+		timings |= reg & 0x80000000;	/* preserve PIO format bit */
+		pci_write_config_dword(dev, basereg + 4, timings);
+	} else
+		pci_write_config_dword(dev, basereg + 12, timings);
+}
+
+/*  Replacement for the standard ide_dma_end action in
+ *  dma_proc.
+ *
+ *  returns 1 on error, 0 otherwise
+ */
+static int sc1200_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned long dma_base = hwif->dma_base;
+	u8 dma_stat;
+
+	dma_stat = inb(dma_base+2);		/* get DMA status */
+
+	if (!(dma_stat & 4))
+		printk(" ide_dma_end dma_stat=%0x err=%x newerr=%x\n",
+		  dma_stat, ((dma_stat&7)!=4), ((dma_stat&2)==2));
+
+	outb(dma_stat|0x1b, dma_base+2);	/* clear the INTR & ERROR bits */
+	outb(inb(dma_base)&~1, dma_base);	/* !! DO THIS HERE !! stop DMA */
+
+	return (dma_stat & 7) != 4;		/* verify good DMA status */
+}
+
+/*
+ * sc1200_set_pio_mode() handles setting of PIO modes
+ * for both the chipset and drive.
+ *
+ * All existing BIOSs for this chipset guarantee that all drives
+ * will have valid default PIO timings set up before we get here.
+ */
+
+static void sc1200_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	int		mode = -1;
+	const u8	pio = drive->pio_mode - XFER_PIO_0;
+
+	/*
+	 * bad abuse of ->set_pio_mode interface
+	 */
+	switch (pio) {
+		case 200: mode = XFER_UDMA_0;	break;
+		case 201: mode = XFER_UDMA_1;	break;
+		case 202: mode = XFER_UDMA_2;	break;
+		case 100: mode = XFER_MW_DMA_0;	break;
+		case 101: mode = XFER_MW_DMA_1;	break;
+		case 102: mode = XFER_MW_DMA_2;	break;
+	}
+	if (mode != -1) {
+		printk("SC1200: %s: changing (U)DMA mode\n", drive->name);
+		ide_dma_off_quietly(drive);
+		if (ide_set_dma_mode(drive, mode) == 0 &&
+		    (drive->dev_flags & IDE_DFLAG_USING_DMA))
+			hwif->dma_ops->dma_host_set(drive, 1);
+		return;
+	}
+
+	sc1200_tunepio(drive, pio);
+}
+
+#ifdef CONFIG_PM
+struct sc1200_saved_state {
+	u32 regs[8];
+};
+
+static int sc1200_suspend (struct pci_dev *dev, pm_message_t state)
+{
+	printk("SC1200: suspend(%u)\n", state.event);
+
+	/*
+	 * we only save state when going from full power to less
+	 */
+	if (state.event == PM_EVENT_ON) {
+		struct ide_host *host = pci_get_drvdata(dev);
+		struct sc1200_saved_state *ss = host->host_priv;
+		unsigned int r;
+
+		/*
+		 * save timing registers
+		 * (this may be unnecessary if BIOS also does it)
+		 */
+		for (r = 0; r < 8; r++)
+			pci_read_config_dword(dev, 0x40 + r * 4, &ss->regs[r]);
+	}
+
+	pci_disable_device(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+	return 0;
+}
+
+static int sc1200_resume (struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct sc1200_saved_state *ss = host->host_priv;
+	unsigned int r;
+	int i;
+
+	i = pci_enable_device(dev);
+	if (i)
+		return i;
+
+	/*
+	 * restore timing registers
+	 * (this may be unnecessary if BIOS also does it)
+	 */
+	for (r = 0; r < 8; r++)
+		pci_write_config_dword(dev, 0x40 + r * 4, ss->regs[r]);
+
+	return 0;
+}
+#endif
+
+static const struct ide_port_ops sc1200_port_ops = {
+	.set_pio_mode		= sc1200_set_pio_mode,
+	.set_dma_mode		= sc1200_set_dma_mode,
+	.udma_filter		= sc1200_udma_filter,
+};
+
+static const struct ide_dma_ops sc1200_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= sc1200_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info sc1200_chipset = {
+	.name		= DRV_NAME,
+	.port_ops	= &sc1200_port_ops,
+	.dma_ops	= &sc1200_dma_ops,
+	.host_flags	= IDE_HFLAG_SERIALIZE |
+			  IDE_HFLAG_POST_SET_MODE |
+			  IDE_HFLAG_ABUSE_DMA_MODES,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA2,
+};
+
+static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct sc1200_saved_state *ss = NULL;
+	int rc;
+
+#ifdef CONFIG_PM
+	ss = kmalloc(sizeof(*ss), GFP_KERNEL);
+	if (ss == NULL)
+		return -ENOMEM;
+#endif
+	rc = ide_pci_init_one(dev, &sc1200_chipset, ss);
+	if (rc)
+		kfree(ss);
+
+	return rc;
+}
+
+static const struct pci_device_id sc1200_pci_tbl[] = {
+	{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), 0},
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, sc1200_pci_tbl);
+
+static struct pci_driver sc1200_pci_driver = {
+	.name		= "SC1200_IDE",
+	.id_table	= sc1200_pci_tbl,
+	.probe		= sc1200_init_one,
+	.remove		= ide_pci_remove,
+#ifdef CONFIG_PM
+	.suspend	= sc1200_suspend,
+	.resume		= sc1200_resume,
+#endif
+};
+
+static int __init sc1200_ide_init(void)
+{
+	return ide_pci_register_driver(&sc1200_pci_driver);
+}
+
+static void __exit sc1200_ide_exit(void)
+{
+	pci_unregister_driver(&sc1200_pci_driver);
+}
+
+module_init(sc1200_ide_init);
+module_exit(sc1200_ide_exit);
+
+MODULE_AUTHOR("Mark Lord");
+MODULE_DESCRIPTION("PCI driver module for NS SC1200 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/serverworks.c b/drivers/ide/serverworks.c
new file mode 100644
index 000000000..458e72e03
--- /dev/null
+++ b/drivers/ide/serverworks.c
@@ -0,0 +1,456 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 1998-2000 Michel Aubry
+ * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
+ * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
+ * Portions copyright (c) 2001 Sun Microsystems
+ *
+ *
+ * RCC/ServerWorks IDE driver for Linux
+ *
+ *   OSB4: `Open South Bridge' IDE Interface (fn 1)
+ *         supports UDMA mode 2 (33 MB/s)
+ *
+ *   CSB5: `Champion South Bridge' IDE Interface (fn 1)
+ *         all revisions support UDMA mode 4 (66 MB/s)
+ *         revision A2.0 and up support UDMA mode 5 (100 MB/s)
+ *
+ *         *** The CSB5 does not provide ANY register ***
+ *         *** to detect 80-conductor cable presence. ***
+ *
+ *   CSB6: `Champion South Bridge' IDE Interface (optional: third channel)
+ *
+ *   HT1000: AKA BCM5785 - Hypertransport Southbridge for Opteron systems. IDE
+ *   controller same as the CSB6. Single channel ATA100 only.
+ *
+ * Documentation:
+ *	Available under NDA only. Errata info very hard to get.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "serverworks"
+
+#define SVWKS_CSB5_REVISION_NEW	0x92 /* min PCI_REVISION_ID for UDMA5 (A2.0) */
+#define SVWKS_CSB6_REVISION	0xa0 /* min PCI_REVISION_ID for UDMA4 (A1.0) */
+
+/* Seagate Barracuda ATA IV Family drives in UDMA mode 5
+ * can overrun their FIFOs when used with the CSB5 */
+static const char *svwks_bad_ata100[] = {
+	"ST320011A",
+	"ST340016A",
+	"ST360021A",
+	"ST380021A",
+	NULL
+};
+
+static int check_in_drive_lists (ide_drive_t *drive, const char **list)
+{
+	char *m = (char *)&drive->id[ATA_ID_PROD];
+
+	while (*list)
+		if (!strcmp(*list++, m))
+			return 1;
+	return 0;
+}
+
+static u8 svwks_udma_filter(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+
+	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
+		return 0x1f;
+	} else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
+		return 0x07;
+	} else {
+		u8 btr = 0, mode, mask;
+
+		pci_read_config_byte(dev, 0x5A, &btr);
+		mode = btr & 0x3;
+
+		/* If someone decides to do UDMA133 on CSB5 the same
+		   issue will bite so be inclusive */
+		if (mode > 2 && check_in_drive_lists(drive, svwks_bad_ata100))
+			mode = 2;
+
+		switch(mode) {
+		case 3:	 mask = 0x3f; break;
+		case 2:	 mask = 0x1f; break;
+		case 1:	 mask = 0x07; break;
+		default: mask = 0x00; break;
+		}
+
+		return mask;
+	}
+}
+
+static u8 svwks_csb_check (struct pci_dev *dev)
+{
+	switch (dev->device) {
+		case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
+		case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
+		case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
+		case PCI_DEVICE_ID_SERVERWORKS_HT1000IDE:
+			return 1;
+		default:
+			break;
+	}
+	return 0;
+}
+
+static void svwks_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u8 pio_modes[] = { 0x5d, 0x47, 0x34, 0x22, 0x20 };
+	static const u8 drive_pci[] = { 0x41, 0x40, 0x43, 0x42 };
+
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	if (drive->dn >= ARRAY_SIZE(drive_pci))
+		return;
+
+	pci_write_config_byte(dev, drive_pci[drive->dn], pio_modes[pio]);
+
+	if (svwks_csb_check(dev)) {
+		u16 csb_pio = 0;
+
+		pci_read_config_word(dev, 0x4a, &csb_pio);
+
+		csb_pio &= ~(0x0f << (4 * drive->dn));
+		csb_pio |= (pio << (4 * drive->dn));
+
+		pci_write_config_word(dev, 0x4a, csb_pio);
+	}
+}
+
+static void svwks_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u8 udma_modes[]		= { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05 };
+	static const u8 dma_modes[]		= { 0x77, 0x21, 0x20 };
+	static const u8 drive_pci2[]		= { 0x45, 0x44, 0x47, 0x46 };
+
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	const u8 speed		= drive->dma_mode;
+	u8 unit			= drive->dn & 1;
+
+	u8 ultra_enable	 = 0, ultra_timing = 0, dma_timing = 0;
+
+	if (drive->dn >= ARRAY_SIZE(drive_pci2))
+		return;
+
+	pci_read_config_byte(dev, (0x56|hwif->channel), &ultra_timing);
+	pci_read_config_byte(dev, 0x54, &ultra_enable);
+
+	ultra_timing	&= ~(0x0F << (4*unit));
+	ultra_enable	&= ~(0x01 << drive->dn);
+
+	if (speed >= XFER_UDMA_0) {
+		dma_timing   |= dma_modes[2];
+		ultra_timing |= (udma_modes[speed - XFER_UDMA_0] << (4 * unit));
+		ultra_enable |= (0x01 << drive->dn);
+	} else if (speed >= XFER_MW_DMA_0)
+		dma_timing   |= dma_modes[speed - XFER_MW_DMA_0];
+
+	pci_write_config_byte(dev, drive_pci2[drive->dn], dma_timing);
+	pci_write_config_byte(dev, (0x56|hwif->channel), ultra_timing);
+	pci_write_config_byte(dev, 0x54, ultra_enable);
+}
+
+static int init_chipset_svwks(struct pci_dev *dev)
+{
+	unsigned int reg;
+	u8 btr;
+
+	/* force Master Latency Timer value to 64 PCICLKs */
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
+
+	/* OSB4 : South Bridge and IDE */
+	if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
+		struct pci_dev *isa_dev =
+			pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+					PCI_DEVICE_ID_SERVERWORKS_OSB4, NULL);
+		if (isa_dev) {
+			pci_read_config_dword(isa_dev, 0x64, &reg);
+			reg &= ~0x00002000; /* disable 600ns interrupt mask */
+			if(!(reg & 0x00004000))
+				printk(KERN_DEBUG DRV_NAME " %s: UDMA not BIOS "
+					"enabled.\n", pci_name(dev));
+			reg |=  0x00004000; /* enable UDMA/33 support */
+			pci_write_config_dword(isa_dev, 0x64, reg);
+			pci_dev_put(isa_dev);
+		}
+	}
+
+	/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
+	else if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
+		 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
+		 (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {
+
+		/* Third Channel Test */
+		if (!(PCI_FUNC(dev->devfn) & 1)) {
+			struct pci_dev * findev = NULL;
+			u32 reg4c = 0;
+			findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+				PCI_DEVICE_ID_SERVERWORKS_CSB5, NULL);
+			if (findev) {
+				pci_read_config_dword(findev, 0x4C, &reg4c);
+				reg4c &= ~0x000007FF;
+				reg4c |=  0x00000040;
+				reg4c |=  0x00000020;
+				pci_write_config_dword(findev, 0x4C, reg4c);
+				pci_dev_put(findev);
+			}
+			outb_p(0x06, 0x0c00);
+			dev->irq = inb_p(0x0c01);
+		} else {
+			struct pci_dev * findev = NULL;
+			u8 reg41 = 0;
+
+			findev = pci_get_device(PCI_VENDOR_ID_SERVERWORKS,
+					PCI_DEVICE_ID_SERVERWORKS_CSB6, NULL);
+			if (findev) {
+				pci_read_config_byte(findev, 0x41, &reg41);
+				reg41 &= ~0x40;
+				pci_write_config_byte(findev, 0x41, reg41);
+				pci_dev_put(findev);
+			}
+			/*
+			 * This is a device pin issue on CSB6.
+			 * Since there will be a future raid mode,
+			 * early versions of the chipset require the
+			 * interrupt pin to be set, and it is a compatibility
+			 * mode issue.
+			 */
+			if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
+				dev->irq = 0;
+		}
+//		pci_read_config_dword(dev, 0x40, &pioreg)
+//		pci_write_config_dword(dev, 0x40, 0x99999999);
+//		pci_read_config_dword(dev, 0x44, &dmareg);
+//		pci_write_config_dword(dev, 0x44, 0xFFFFFFFF);
+		/* setup the UDMA Control register
+		 *
+		 * 1. clear bit 6 to enable DMA
+		 * 2. enable DMA modes with bits 0-1
+		 * 	00 : legacy
+		 * 	01 : udma2
+		 * 	10 : udma2/udma4
+		 * 	11 : udma2/udma4/udma5
+		 */
+		pci_read_config_byte(dev, 0x5A, &btr);
+		btr &= ~0x40;
+		if (!(PCI_FUNC(dev->devfn) & 1))
+			btr |= 0x2;
+		else
+			btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
+		pci_write_config_byte(dev, 0x5A, btr);
+	}
+	/* Setup HT1000 SouthBridge Controller - Single Channel Only */
+	else if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE) {
+		pci_read_config_byte(dev, 0x5A, &btr);
+		btr &= ~0x40;
+		btr |= 0x3;
+		pci_write_config_byte(dev, 0x5A, btr);
+	}
+
+	return 0;
+}
+
+static u8 ata66_svwks_svwks(ide_hwif_t *hwif)
+{
+	return ATA_CBL_PATA80;
+}
+
+/* On Dell PowerEdge servers with a CSB5/CSB6, the top two bits
+ * of the subsystem device ID indicate presence of an 80-pin cable.
+ * Bit 15 clear = secondary IDE channel does not have 80-pin cable.
+ * Bit 15 set   = secondary IDE channel has 80-pin cable.
+ * Bit 14 clear = primary IDE channel does not have 80-pin cable.
+ * Bit 14 set   = primary IDE channel has 80-pin cable.
+ */
+static u8 ata66_svwks_dell(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
+	    dev->vendor	== PCI_VENDOR_ID_SERVERWORKS &&
+	    (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE ||
+	     dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE))
+		return ((1 << (hwif->channel + 14)) &
+			dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+	return ATA_CBL_PATA40;
+}
+
+/* Sun Cobalt Alpine hardware avoids the 80-pin cable
+ * detect issue by attaching the drives directly to the board.
+ * This check follows the Dell precedent (how scary is that?!)
+ *
+ * WARNING: this only works on Alpine hardware!
+ */
+static u8 ata66_svwks_cobalt(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN &&
+	    dev->vendor	== PCI_VENDOR_ID_SERVERWORKS &&
+	    dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
+		return ((1 << (hwif->channel + 14)) &
+			dev->subsystem_device) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+	return ATA_CBL_PATA40;
+}
+
+static u8 svwks_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	/* Server Works */
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_SERVERWORKS)
+		return ata66_svwks_svwks (hwif);
+	
+	/* Dell PowerEdge */
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_DELL)
+		return ata66_svwks_dell (hwif);
+
+	/* Cobalt Alpine */
+	if (dev->subsystem_vendor == PCI_VENDOR_ID_SUN)
+		return ata66_svwks_cobalt (hwif);
+
+	/* Per Specified Design by OEM, and ASIC Architect */
+	if ((dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||
+	    (dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2))
+		return ATA_CBL_PATA80;
+
+	return ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops osb4_port_ops = {
+	.set_pio_mode		= svwks_set_pio_mode,
+	.set_dma_mode		= svwks_set_dma_mode,
+};
+
+static const struct ide_port_ops svwks_port_ops = {
+	.set_pio_mode		= svwks_set_pio_mode,
+	.set_dma_mode		= svwks_set_dma_mode,
+	.udma_filter		= svwks_udma_filter,
+	.cable_detect		= svwks_cable_detect,
+};
+
+static const struct ide_port_info serverworks_chipsets[] = {
+	{	/* 0: OSB4 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_svwks,
+		.port_ops	= &osb4_port_ops,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= 0x00, /* UDMA is problematic on OSB4 */
+	},
+	{	/* 1: CSB5 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_svwks,
+		.port_ops	= &svwks_port_ops,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	},
+	{	/* 2: CSB6 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_svwks,
+		.port_ops	= &svwks_port_ops,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	},
+	{	/* 3: CSB6-2 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_svwks,
+		.port_ops	= &svwks_port_ops,
+		.host_flags	= IDE_HFLAG_SINGLE,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	},
+	{	/* 4: HT1000 */
+		.name		= DRV_NAME,
+		.init_chipset	= init_chipset_svwks,
+		.port_ops	= &svwks_port_ops,
+		.host_flags	= IDE_HFLAG_SINGLE,
+		.pio_mask	= ATA_PIO4,
+		.mwdma_mask	= ATA_MWDMA2,
+		.udma_mask	= ATA_UDMA5,
+	}
+};
+
+/**
+ *	svwks_init_one	-	called when a OSB/CSB is found
+ *	@dev: the svwks device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+ 
+static int svwks_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+
+	d = serverworks_chipsets[idx];
+
+	if (idx == 1)
+		d.host_flags |= IDE_HFLAG_CLEAR_SIMPLEX;
+	else if (idx == 2 || idx == 3) {
+		if ((PCI_FUNC(dev->devfn) & 1) == 0) {
+			if (pci_resource_start(dev, 0) != 0x01f1)
+				d.host_flags |= IDE_HFLAG_NON_BOOTABLE;
+			d.host_flags |= IDE_HFLAG_SINGLE;
+		} else
+			d.host_flags &= ~IDE_HFLAG_SINGLE;
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id svwks_pci_tbl[] = {
+	{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_OSB4IDE),   0 },
+	{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB5IDE),   1 },
+	{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE),   2 },
+	{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2),  3 },
+	{ PCI_VDEVICE(SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_HT1000IDE), 4 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, svwks_pci_tbl);
+
+static struct pci_driver svwks_pci_driver = {
+	.name		= "Serverworks_IDE",
+	.id_table	= svwks_pci_tbl,
+	.probe		= svwks_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init svwks_ide_init(void)
+{
+	return ide_pci_register_driver(&svwks_pci_driver);
+}
+
+static void __exit svwks_ide_exit(void)
+{
+	pci_unregister_driver(&svwks_pci_driver);
+}
+
+module_init(svwks_ide_init);
+module_exit(svwks_ide_exit);
+
+MODULE_AUTHOR("Michael Aubry. Andrzej Krzysztofowicz, Andre Hedrick, Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("PCI driver module for Serverworks OSB4/CSB5/CSB6 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
new file mode 100644
index 000000000..fdc8e8131
--- /dev/null
+++ b/drivers/ide/setup-pci.c
@@ -0,0 +1,682 @@
+/*
+ *  Copyright (C) 1998-2000  Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 1995-1998  Mark Lord
+ *  Copyright (C) 2007-2009  Bartlomiej Zolnierkiewicz
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ide.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+
+/**
+ *	ide_setup_pci_baseregs	-	place a PCI IDE controller native
+ *	@dev: PCI device of interface to switch native
+ *	@name: Name of interface
+ *
+ *	We attempt to place the PCI interface into PCI native mode. If
+ *	we succeed the BARs are ok and the controller is in PCI mode.
+ *	Returns 0 on success or an errno code.
+ *
+ *	FIXME: if we program the interface and then fail to set the BARS
+ *	we don't switch it back to legacy mode. Do we actually care ??
+ */
+
+static int ide_setup_pci_baseregs(struct pci_dev *dev, const char *name)
+{
+	u8 progif = 0;
+
+	/*
+	 * Place both IDE interfaces into PCI "native" mode:
+	 */
+	if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
+			 (progif & 5) != 5) {
+		if ((progif & 0xa) != 0xa) {
+			printk(KERN_INFO "%s %s: device not capable of full "
+				"native PCI mode\n", name, pci_name(dev));
+			return -EOPNOTSUPP;
+		}
+		printk(KERN_INFO "%s %s: placing both ports into native PCI "
+			"mode\n", name, pci_name(dev));
+		(void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
+		if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
+		    (progif & 5) != 5) {
+			printk(KERN_ERR "%s %s: rewrite of PROGIF failed, "
+				"wanted 0x%04x, got 0x%04x\n",
+				name, pci_name(dev), progif | 5, progif);
+			return -EOPNOTSUPP;
+		}
+	}
+	return 0;
+}
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+static int ide_pci_clear_simplex(unsigned long dma_base, const char *name)
+{
+	u8 dma_stat = inb(dma_base + 2);
+
+	outb(dma_stat & 0x60, dma_base + 2);
+	dma_stat = inb(dma_base + 2);
+
+	return (dma_stat & 0x80) ? 1 : 0;
+}
+
+/**
+ *	ide_pci_dma_base	-	setup BMIBA
+ *	@hwif: IDE interface
+ *	@d: IDE port info
+ *
+ *	Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space.
+ */
+
+unsigned long ide_pci_dma_base(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long dma_base = 0;
+
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		return hwif->dma_base;
+
+	if (hwif->mate && hwif->mate->dma_base) {
+		dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8);
+	} else {
+		u8 baridx = (d->host_flags & IDE_HFLAG_CS5520) ? 2 : 4;
+
+		dma_base = pci_resource_start(dev, baridx);
+
+		if (dma_base == 0) {
+			printk(KERN_ERR "%s %s: DMA base is invalid\n",
+				d->name, pci_name(dev));
+			return 0;
+		}
+	}
+
+	if (hwif->channel)
+		dma_base += 8;
+
+	return dma_base;
+}
+EXPORT_SYMBOL_GPL(ide_pci_dma_base);
+
+int ide_pci_check_simplex(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 dma_stat;
+
+	if (d->host_flags & (IDE_HFLAG_MMIO | IDE_HFLAG_CS5520))
+		goto out;
+
+	if (d->host_flags & IDE_HFLAG_CLEAR_SIMPLEX) {
+		if (ide_pci_clear_simplex(hwif->dma_base, d->name))
+			printk(KERN_INFO "%s %s: simplex device: DMA forced\n",
+				d->name, pci_name(dev));
+		goto out;
+	}
+
+	/*
+	 * If the device claims "simplex" DMA, this means that only one of
+	 * the two interfaces can be trusted with DMA at any point in time
+	 * (so we should enable DMA only on one of the two interfaces).
+	 *
+	 * FIXME: At this point we haven't probed the drives so we can't make
+	 * the appropriate decision.  Really we should defer this problem until
+	 * we tune the drive then try to grab DMA ownership if we want to be
+	 * the DMA end.  This has to be become dynamic to handle hot-plug.
+	 */
+	dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
+	if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
+		printk(KERN_INFO "%s %s: simplex device: DMA disabled\n",
+			d->name, pci_name(dev));
+		return -1;
+	}
+out:
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_pci_check_simplex);
+
+/*
+ * Set up BM-DMA capability (PnP BIOS should have done this)
+ */
+int ide_pci_set_master(struct pci_dev *dev, const char *name)
+{
+	u16 pcicmd;
+
+	pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
+
+	if ((pcicmd & PCI_COMMAND_MASTER) == 0) {
+		pci_set_master(dev);
+
+		if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd) ||
+		    (pcicmd & PCI_COMMAND_MASTER) == 0) {
+			printk(KERN_ERR "%s %s: error updating PCICMD\n",
+				name, pci_name(dev));
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_pci_set_master);
+#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+
+void ide_setup_pci_noise(struct pci_dev *dev, const struct ide_port_info *d)
+{
+	printk(KERN_INFO "%s %s: IDE controller (0x%04x:0x%04x rev 0x%02x)\n",
+		d->name, pci_name(dev),
+		dev->vendor, dev->device, dev->revision);
+}
+EXPORT_SYMBOL_GPL(ide_setup_pci_noise);
+
+
+/**
+ *	ide_pci_enable	-	do PCI enables
+ *	@dev: PCI device
+ *	@bars: PCI BARs mask
+ *	@d: IDE port info
+ *
+ *	Enable the IDE PCI device. We attempt to enable the device in full
+ *	but if that fails then we only need IO space. The PCI code should
+ *	have setup the proper resources for us already for controllers in
+ *	legacy mode.
+ *
+ *	Returns zero on success or an error code
+ */
+
+static int ide_pci_enable(struct pci_dev *dev, int bars,
+			  const struct ide_port_info *d)
+{
+	int ret;
+
+	if (pci_enable_device(dev)) {
+		ret = pci_enable_device_io(dev);
+		if (ret < 0) {
+			printk(KERN_WARNING "%s %s: couldn't enable device\n",
+				d->name, pci_name(dev));
+			goto out;
+		}
+		printk(KERN_WARNING "%s %s: BIOS configuration fixed\n",
+			d->name, pci_name(dev));
+	}
+
+	/*
+	 * assume all devices can do 32-bit DMA for now, we can add
+	 * a DMA mask field to the struct ide_port_info if we need it
+	 * (or let lower level driver set the DMA mask)
+	 */
+	ret = dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
+	if (ret < 0) {
+		printk(KERN_ERR "%s %s: can't set DMA mask\n",
+			d->name, pci_name(dev));
+		goto out;
+	}
+
+	ret = pci_request_selected_regions(dev, bars, d->name);
+	if (ret < 0)
+		printk(KERN_ERR "%s %s: can't reserve resources\n",
+			d->name, pci_name(dev));
+out:
+	return ret;
+}
+
+/**
+ *	ide_pci_configure	-	configure an unconfigured device
+ *	@dev: PCI device
+ *	@d: IDE port info
+ *
+ *	Enable and configure the PCI device we have been passed.
+ *	Returns zero on success or an error code.
+ */
+
+static int ide_pci_configure(struct pci_dev *dev, const struct ide_port_info *d)
+{
+	u16 pcicmd = 0;
+	/*
+	 * PnP BIOS was *supposed* to have setup this device, but we
+	 * can do it ourselves, so long as the BIOS has assigned an IRQ
+	 * (or possibly the device is using a "legacy header" for IRQs).
+	 * Maybe the user deliberately *disabled* the device,
+	 * but we'll eventually ignore it again if no drives respond.
+	 */
+	if (ide_setup_pci_baseregs(dev, d->name) ||
+	    pci_write_config_word(dev, PCI_COMMAND, pcicmd | PCI_COMMAND_IO)) {
+		printk(KERN_INFO "%s %s: device disabled (BIOS)\n",
+			d->name, pci_name(dev));
+		return -ENODEV;
+	}
+	if (pci_read_config_word(dev, PCI_COMMAND, &pcicmd)) {
+		printk(KERN_ERR "%s %s: error accessing PCI regs\n",
+			d->name, pci_name(dev));
+		return -EIO;
+	}
+	if (!(pcicmd & PCI_COMMAND_IO)) {
+		printk(KERN_ERR "%s %s: unable to enable IDE controller\n",
+			d->name, pci_name(dev));
+		return -ENXIO;
+	}
+	return 0;
+}
+
+/**
+ *	ide_pci_check_iomem	-	check a register is I/O
+ *	@dev: PCI device
+ *	@d: IDE port info
+ *	@bar: BAR number
+ *
+ *	Checks if a BAR is configured and points to MMIO space. If so,
+ *	return an error code. Otherwise return 0
+ */
+
+static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *d,
+			       int bar)
+{
+	ulong flags = pci_resource_flags(dev, bar);
+
+	/* Unconfigured ? */
+	if (!flags || pci_resource_len(dev, bar) == 0)
+		return 0;
+
+	/* I/O space */
+	if (flags & IORESOURCE_IO)
+		return 0;
+
+	/* Bad */
+	return -EINVAL;
+}
+
+/**
+ *	ide_hw_configure	-	configure a struct ide_hw instance
+ *	@dev: PCI device holding interface
+ *	@d: IDE port info
+ *	@port: port number
+ *	@hw: struct ide_hw instance corresponding to this port
+ *
+ *	Perform the initial set up for the hardware interface structure. This
+ *	is done per interface port rather than per PCI device. There may be
+ *	more than one port per device.
+ *
+ *	Returns zero on success or an error code.
+ */
+
+static int ide_hw_configure(struct pci_dev *dev, const struct ide_port_info *d,
+			    unsigned int port, struct ide_hw *hw)
+{
+	unsigned long ctl = 0, base = 0;
+
+	if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
+		if (ide_pci_check_iomem(dev, d, 2 * port) ||
+		    ide_pci_check_iomem(dev, d, 2 * port + 1)) {
+			printk(KERN_ERR "%s %s: I/O baseregs (BIOS) are "
+				"reported as MEM for port %d!\n",
+				d->name, pci_name(dev), port);
+			return -EINVAL;
+		}
+
+		ctl  = pci_resource_start(dev, 2*port+1);
+		base = pci_resource_start(dev, 2*port);
+	} else {
+		/* Use default values */
+		ctl = port ? 0x374 : 0x3f4;
+		base = port ? 0x170 : 0x1f0;
+	}
+
+	if (!base || !ctl) {
+		printk(KERN_ERR "%s %s: bad PCI BARs for port %d, skipping\n",
+			d->name, pci_name(dev), port);
+		return -EINVAL;
+	}
+
+	memset(hw, 0, sizeof(*hw));
+	hw->dev = &dev->dev;
+	ide_std_init_ports(hw, base, ctl | 2);
+
+	return 0;
+}
+
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+/**
+ *	ide_hwif_setup_dma	-	configure DMA interface
+ *	@hwif: IDE interface
+ *	@d: IDE port info
+ *
+ *	Set up the DMA base for the interface. Enable the master bits as
+ *	necessary and attempt to bring the device DMA into a ready to use
+ *	state
+ */
+
+int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+
+	if ((d->host_flags & IDE_HFLAG_NO_AUTODMA) == 0 ||
+	    ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE &&
+	     (dev->class & 0x80))) {
+		unsigned long base = ide_pci_dma_base(hwif, d);
+
+		if (base == 0)
+			return -1;
+
+		hwif->dma_base = base;
+
+		if (hwif->dma_ops == NULL)
+			hwif->dma_ops = &sff_dma_ops;
+
+		if (ide_pci_check_simplex(hwif, d) < 0)
+			return -1;
+
+		if (ide_pci_set_master(dev, d->name) < 0)
+			return -1;
+
+		if (hwif->host_flags & IDE_HFLAG_MMIO)
+			printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
+		else
+			printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
+					 hwif->name, base, base + 7);
+
+		hwif->extra_base = base + (hwif->channel ? 8 : 16);
+
+		if (ide_allocate_dma_engine(hwif))
+			return -1;
+	}
+
+	return 0;
+}
+#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
+
+/**
+ *	ide_setup_pci_controller	-	set up IDE PCI
+ *	@dev: PCI device
+ *	@bars: PCI BARs mask
+ *	@d: IDE port info
+ *	@noisy: verbose flag
+ *
+ *	Set up the PCI and controller side of the IDE interface. This brings
+ *	up the PCI side of the device, checks that the device is enabled
+ *	and enables it if need be
+ */
+
+static int ide_setup_pci_controller(struct pci_dev *dev, int bars,
+				    const struct ide_port_info *d, int noisy)
+{
+	int ret;
+	u16 pcicmd;
+
+	if (noisy)
+		ide_setup_pci_noise(dev, d);
+
+	ret = ide_pci_enable(dev, bars, d);
+	if (ret < 0)
+		goto out;
+
+	ret = pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
+	if (ret < 0) {
+		printk(KERN_ERR "%s %s: error accessing PCI regs\n",
+			d->name, pci_name(dev));
+		goto out_free_bars;
+	}
+	if (!(pcicmd & PCI_COMMAND_IO)) {	/* is device disabled? */
+		ret = ide_pci_configure(dev, d);
+		if (ret < 0)
+			goto out_free_bars;
+		printk(KERN_INFO "%s %s: device enabled (Linux)\n",
+			d->name, pci_name(dev));
+	}
+
+	goto out;
+
+out_free_bars:
+	pci_release_selected_regions(dev, bars);
+out:
+	return ret;
+}
+
+/**
+ *	ide_pci_setup_ports	-	configure ports/devices on PCI IDE
+ *	@dev: PCI device
+ *	@d: IDE port info
+ *	@hw: struct ide_hw instances corresponding to this PCI IDE device
+ *	@hws: struct ide_hw pointers table to update
+ *
+ *	Scan the interfaces attached to this device and do any
+ *	necessary per port setup. Attach the devices and ask the
+ *	generic DMA layer to do its work for us.
+ *
+ *	Normally called automaticall from do_ide_pci_setup_device,
+ *	but is also used directly as a helper function by some controllers
+ *	where the chipset setup is not the default PCI IDE one.
+ */
+
+void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d,
+			 struct ide_hw *hw, struct ide_hw **hws)
+{
+	int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
+	u8 tmp;
+
+	/*
+	 * Set up the IDE ports
+	 */
+
+	for (port = 0; port < channels; ++port) {
+		const struct ide_pci_enablebit *e = &d->enablebits[port];
+
+		if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
+		    (tmp & e->mask) != e->val)) {
+			printk(KERN_INFO "%s %s: IDE port disabled\n",
+				d->name, pci_name(dev));
+			continue;	/* port not enabled */
+		}
+
+		if (ide_hw_configure(dev, d, port, hw + port))
+			continue;
+
+		*(hws + port) = hw + port;
+	}
+}
+EXPORT_SYMBOL_GPL(ide_pci_setup_ports);
+
+/*
+ * ide_setup_pci_device() looks at the primary/secondary interfaces
+ * on a PCI IDE device and, if they are enabled, prepares the IDE driver
+ * for use with them.  This generic code works for most PCI chipsets.
+ *
+ * One thing that is not standardized is the location of the
+ * primary/secondary interface "enable/disable" bits.  For chipsets that
+ * we "know" about, this information is in the struct ide_port_info;
+ * for all other chipsets, we just assume both interfaces are enabled.
+ */
+static int do_ide_setup_pci_device(struct pci_dev *dev,
+				   const struct ide_port_info *d,
+				   u8 noisy)
+{
+	int pciirq, ret;
+
+	/*
+	 * Can we trust the reported IRQ?
+	 */
+	pciirq = dev->irq;
+
+	/*
+	 * This allows offboard ide-pci cards the enable a BIOS,
+	 * verify interrupt settings of split-mirror pci-config
+	 * space, place chipset into init-mode, and/or preserve
+	 * an interrupt if the card is not native ide support.
+	 */
+	ret = d->init_chipset ? d->init_chipset(dev) : 0;
+	if (ret < 0)
+		goto out;
+
+	if (ide_pci_is_in_compatibility_mode(dev)) {
+		if (noisy)
+			printk(KERN_INFO "%s %s: not 100%% native mode: will "
+				"probe irqs later\n", d->name, pci_name(dev));
+		pciirq = 0;
+	} else if (!pciirq && noisy) {
+		printk(KERN_WARNING "%s %s: bad irq (%d): will probe later\n",
+			d->name, pci_name(dev), pciirq);
+	} else if (noisy) {
+		printk(KERN_INFO "%s %s: 100%% native mode on irq %d\n",
+			d->name, pci_name(dev), pciirq);
+	}
+
+	ret = pciirq;
+out:
+	return ret;
+}
+
+int ide_pci_init_two(struct pci_dev *dev1, struct pci_dev *dev2,
+		     const struct ide_port_info *d, void *priv)
+{
+	struct pci_dev *pdev[] = { dev1, dev2 };
+	struct ide_host *host;
+	int ret, i, n_ports = dev2 ? 4 : 2, bars;
+	struct ide_hw hw[4], *hws[] = { NULL, NULL, NULL, NULL };
+
+	if (d->host_flags & IDE_HFLAG_SINGLE)
+		bars = (1 << 2) - 1;
+	else
+		bars = (1 << 4) - 1;
+
+	if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
+		if (d->host_flags & IDE_HFLAG_CS5520)
+			bars |= (1 << 2);
+		else
+			bars |= (1 << 4);
+	}
+
+	for (i = 0; i < n_ports / 2; i++) {
+		ret = ide_setup_pci_controller(pdev[i], bars, d, !i);
+		if (ret < 0) {
+			if (i == 1)
+				pci_release_selected_regions(pdev[0], bars);
+			goto out;
+		}
+
+		ide_pci_setup_ports(pdev[i], d, &hw[i*2], &hws[i*2]);
+	}
+
+	host = ide_host_alloc(d, hws, n_ports);
+	if (host == NULL) {
+		ret = -ENOMEM;
+		goto out_free_bars;
+	}
+
+	host->dev[0] = &dev1->dev;
+	if (dev2)
+		host->dev[1] = &dev2->dev;
+
+	host->host_priv = priv;
+	host->irq_flags = IRQF_SHARED;
+
+	pci_set_drvdata(pdev[0], host);
+	if (dev2)
+		pci_set_drvdata(pdev[1], host);
+
+	for (i = 0; i < n_ports / 2; i++) {
+		ret = do_ide_setup_pci_device(pdev[i], d, !i);
+
+		/*
+		 * FIXME: Mom, mom, they stole me the helper function to undo
+		 * do_ide_setup_pci_device() on the first device!
+		 */
+		if (ret < 0)
+			goto out_free_bars;
+
+		/* fixup IRQ */
+		if (ide_pci_is_in_compatibility_mode(pdev[i])) {
+			hw[i*2].irq = pci_get_legacy_ide_irq(pdev[i], 0);
+			hw[i*2 + 1].irq = pci_get_legacy_ide_irq(pdev[i], 1);
+		} else
+			hw[i*2 + 1].irq = hw[i*2].irq = ret;
+	}
+
+	ret = ide_host_register(host, d, hws);
+	if (ret)
+		ide_host_free(host);
+	else
+		goto out;
+
+out_free_bars:
+	i = n_ports / 2;
+	while (i--)
+		pci_release_selected_regions(pdev[i], bars);
+out:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ide_pci_init_two);
+
+int ide_pci_init_one(struct pci_dev *dev, const struct ide_port_info *d,
+		     void *priv)
+{
+	return ide_pci_init_two(dev, NULL, d, priv);
+}
+EXPORT_SYMBOL_GPL(ide_pci_init_one);
+
+void ide_pci_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct pci_dev *dev2 = host->dev[1] ? to_pci_dev(host->dev[1]) : NULL;
+	int bars;
+
+	if (host->host_flags & IDE_HFLAG_SINGLE)
+		bars = (1 << 2) - 1;
+	else
+		bars = (1 << 4) - 1;
+
+	if ((host->host_flags & IDE_HFLAG_NO_DMA) == 0) {
+		if (host->host_flags & IDE_HFLAG_CS5520)
+			bars |= (1 << 2);
+		else
+			bars |= (1 << 4);
+	}
+
+	ide_host_remove(host);
+
+	if (dev2)
+		pci_release_selected_regions(dev2, bars);
+	pci_release_selected_regions(dev, bars);
+
+	if (dev2)
+		pci_disable_device(dev2);
+	pci_disable_device(dev);
+}
+EXPORT_SYMBOL_GPL(ide_pci_remove);
+
+#ifdef CONFIG_PM
+int ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
+{
+	pci_save_state(dev);
+	pci_disable_device(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_pci_suspend);
+
+int ide_pci_resume(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	int rc;
+
+	pci_set_power_state(dev, PCI_D0);
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	pci_restore_state(dev);
+	pci_set_master(dev);
+
+	if (host->init_chipset)
+		host->init_chipset(dev);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ide_pci_resume);
+#endif
diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c
new file mode 100644
index 000000000..c4b20f350
--- /dev/null
+++ b/drivers/ide/siimage.c
@@ -0,0 +1,843 @@
+/*
+ * Copyright (C) 2001-2002	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2003		Red Hat
+ * Copyright (C) 2007-2008	MontaVista Software, Inc.
+ * Copyright (C) 2007-2008	Bartlomiej Zolnierkiewicz
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  Documentation for CMD680:
+ *  http://gkernel.sourceforge.net/specs/sii/sii-0680a-v1.31.pdf.bz2
+ *
+ *  Documentation for SiI 3112:
+ *  http://gkernel.sourceforge.net/specs/sii/3112A_SiI-DS-0095-B2.pdf.bz2
+ *
+ *  Errata and other documentation only available under NDA.
+ *
+ *
+ *  FAQ Items:
+ *	If you are using Marvell SATA-IDE adapters with Maxtor drives
+ *	ensure the system is set up for ATA100/UDMA5, not UDMA6.
+ *
+ *	If you are using WD drives with SATA bridges you must set the
+ *	drive to "Single". "Master" will hang.
+ *
+ *	If you have strange problems with nVidia chipset systems please
+ *	see the SI support documentation and update your system BIOS
+ *	if necessary
+ *
+ *  The Dell DRAC4 has some interesting features including effectively hot
+ *  unplugging/replugging the virtual CD interface when the DRAC is reset.
+ *  This often causes drivers/ide/siimage to panic but is ok with the rather
+ *  smarter code in libata.
+ *
+ * TODO:
+ * - VDMA support
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#define DRV_NAME "siimage"
+
+/**
+ *	pdev_is_sata		-	check if device is SATA
+ *	@pdev:	PCI device to check
+ *
+ *	Returns true if this is a SATA controller
+ */
+
+static int pdev_is_sata(struct pci_dev *pdev)
+{
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	switch (pdev->device) {
+	case PCI_DEVICE_ID_SII_3112:
+	case PCI_DEVICE_ID_SII_1210SA:
+		return 1;
+	case PCI_DEVICE_ID_SII_680:
+		return 0;
+	}
+	BUG();
+#endif
+	return 0;
+}
+
+/**
+ *	is_sata			-	check if hwif is SATA
+ *	@hwif:	interface to check
+ *
+ *	Returns true if this is a SATA controller
+ */
+
+static inline int is_sata(ide_hwif_t *hwif)
+{
+	return pdev_is_sata(to_pci_dev(hwif->dev));
+}
+
+/**
+ *	siimage_selreg		-	return register base
+ *	@hwif: interface
+ *	@r: config offset
+ *
+ *	Turn a config register offset into the right address in either
+ *	PCI space or MMIO space to access the control register in question
+ *	Thankfully this is a configuration operation, so isn't performance
+ *	critical.
+ */
+
+static unsigned long siimage_selreg(ide_hwif_t *hwif, int r)
+{
+	unsigned long base = (unsigned long)hwif->hwif_data;
+
+	base += 0xA0 + r;
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		base += hwif->channel << 6;
+	else
+		base += hwif->channel << 4;
+	return base;
+}
+
+/**
+ *	siimage_seldev		-	return register base
+ *	@hwif: interface
+ *	@r: config offset
+ *
+ *	Turn a config register offset into the right address in either
+ *	PCI space or MMIO space to access the control register in question
+ *	including accounting for the unit shift.
+ */
+
+static inline unsigned long siimage_seldev(ide_drive_t *drive, int r)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	u8 unit			= drive->dn & 1;
+
+	base += 0xA0 + r;
+	if (hwif->host_flags & IDE_HFLAG_MMIO)
+		base += hwif->channel << 6;
+	else
+		base += hwif->channel << 4;
+	base |= unit << unit;
+	return base;
+}
+
+static u8 sil_ioread8(struct pci_dev *dev, unsigned long addr)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	u8 tmp = 0;
+
+	if (host->host_priv)
+		tmp = readb((void __iomem *)addr);
+	else
+		pci_read_config_byte(dev, addr, &tmp);
+
+	return tmp;
+}
+
+static u16 sil_ioread16(struct pci_dev *dev, unsigned long addr)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	u16 tmp = 0;
+
+	if (host->host_priv)
+		tmp = readw((void __iomem *)addr);
+	else
+		pci_read_config_word(dev, addr, &tmp);
+
+	return tmp;
+}
+
+static void sil_iowrite8(struct pci_dev *dev, u8 val, unsigned long addr)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+
+	if (host->host_priv)
+		writeb(val, (void __iomem *)addr);
+	else
+		pci_write_config_byte(dev, addr, val);
+}
+
+static void sil_iowrite16(struct pci_dev *dev, u16 val, unsigned long addr)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+
+	if (host->host_priv)
+		writew(val, (void __iomem *)addr);
+	else
+		pci_write_config_word(dev, addr, val);
+}
+
+static void sil_iowrite32(struct pci_dev *dev, u32 val, unsigned long addr)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+
+	if (host->host_priv)
+		writel(val, (void __iomem *)addr);
+	else
+		pci_write_config_dword(dev, addr, val);
+}
+
+/**
+ *	sil_udma_filter		-	compute UDMA mask
+ *	@drive: IDE device
+ *
+ *	Compute the available UDMA speeds for the device on the interface.
+ *
+ *	For the CMD680 this depends on the clocking mode (scsc), for the
+ *	SI3112 SATA controller life is a bit simpler.
+ */
+
+static u8 sil_pata_udma_filter(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	u8 scsc, mask		= 0;
+
+	base += (hwif->host_flags & IDE_HFLAG_MMIO) ? 0x4A : 0x8A;
+
+	scsc = sil_ioread8(dev, base);
+
+	switch (scsc & 0x30) {
+	case 0x10:	/* 133 */
+		mask = ATA_UDMA6;
+		break;
+	case 0x20:	/* 2xPCI */
+		mask = ATA_UDMA6;
+		break;
+	case 0x00:	/* 100 */
+		mask = ATA_UDMA5;
+		break;
+	default: 	/* Disabled ? */
+		BUG();
+	}
+
+	return mask;
+}
+
+static u8 sil_sata_udma_filter(ide_drive_t *drive)
+{
+	char *m = (char *)&drive->id[ATA_ID_PROD];
+
+	return strstr(m, "Maxtor") ? ATA_UDMA5 : ATA_UDMA6;
+}
+
+/**
+ *	sil_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Load the timing settings for this device mode into the
+ *	controller.
+ */
+
+static void sil_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u16 tf_speed[]   = { 0x328a, 0x2283, 0x1281, 0x10c3, 0x10c1 };
+	static const u16 data_speed[] = { 0x328a, 0x2283, 0x1104, 0x10c3, 0x10c1 };
+
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	ide_drive_t *pair	= ide_get_pair_dev(drive);
+	u32 speedt		= 0;
+	u16 speedp		= 0;
+	unsigned long addr	= siimage_seldev(drive, 0x04);
+	unsigned long tfaddr	= siimage_selreg(hwif,	0x02);
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	const u8 pio		= drive->pio_mode - XFER_PIO_0;
+	u8 tf_pio		= pio;
+	u8 mmio			= (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+	u8 addr_mask		= hwif->channel ? (mmio ? 0xF4 : 0x84)
+						: (mmio ? 0xB4 : 0x80);
+	u8 mode			= 0;
+	u8 unit			= drive->dn & 1;
+
+	/* trim *taskfile* PIO to the slowest of the master/slave */
+	if (pair) {
+		u8 pair_pio = pair->pio_mode - XFER_PIO_0;
+
+		if (pair_pio < tf_pio)
+			tf_pio = pair_pio;
+	}
+
+	/* cheat for now and use the docs */
+	speedp = data_speed[pio];
+	speedt = tf_speed[tf_pio];
+
+	sil_iowrite16(dev, speedp, addr);
+	sil_iowrite16(dev, speedt, tfaddr);
+
+	/* now set up IORDY */
+	speedp = sil_ioread16(dev, tfaddr - 2);
+	speedp &= ~0x200;
+
+	mode = sil_ioread8(dev, base + addr_mask);
+	mode &= ~(unit ? 0x30 : 0x03);
+
+	if (ide_pio_need_iordy(drive, pio)) {
+		speedp |= 0x200;
+		mode |= unit ? 0x10 : 0x01;
+	}
+
+	sil_iowrite16(dev, speedp, tfaddr - 2);
+	sil_iowrite8(dev, mode, base + addr_mask);
+}
+
+/**
+ *	sil_set_dma_mode	-	set host controller for DMA mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	Tune the SiI chipset for the desired DMA mode.
+ */
+
+static void sil_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static const u8 ultra6[] = { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 };
+	static const u8 ultra5[] = { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01 };
+	static const u16 dma[]	 = { 0x2208, 0x10C2, 0x10C1 };
+
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long base	= (unsigned long)hwif->hwif_data;
+	u16 ultra = 0, multi	= 0;
+	u8 mode = 0, unit	= drive->dn & 1;
+	u8 mmio			= (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
+	u8 scsc = 0, addr_mask	= hwif->channel ? (mmio ? 0xF4 : 0x84)
+						: (mmio ? 0xB4 : 0x80);
+	unsigned long ma	= siimage_seldev(drive, 0x08);
+	unsigned long ua	= siimage_seldev(drive, 0x0C);
+	const u8 speed		= drive->dma_mode;
+
+	scsc  = sil_ioread8 (dev, base + (mmio ? 0x4A : 0x8A));
+	mode  = sil_ioread8 (dev, base + addr_mask);
+	multi = sil_ioread16(dev, ma);
+	ultra = sil_ioread16(dev, ua);
+
+	mode  &= ~(unit ? 0x30 : 0x03);
+	ultra &= ~0x3F;
+	scsc = ((scsc & 0x30) == 0x00) ? 0 : 1;
+
+	scsc = is_sata(hwif) ? 1 : scsc;
+
+	if (speed >= XFER_UDMA_0) {
+		multi  = dma[2];
+		ultra |= scsc ? ultra6[speed - XFER_UDMA_0] :
+				ultra5[speed - XFER_UDMA_0];
+		mode  |= unit ? 0x30 : 0x03;
+	} else {
+		multi = dma[speed - XFER_MW_DMA_0];
+		mode |= unit ? 0x20 : 0x02;
+	}
+
+	sil_iowrite8 (dev, mode, base + addr_mask);
+	sil_iowrite16(dev, multi, ma);
+	sil_iowrite16(dev, ultra, ua);
+}
+
+static int sil_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long addr	= siimage_selreg(hwif, 1);
+	u8 val			= sil_ioread8(dev, addr);
+
+	/* Return 1 if INTRQ asserted */
+	return (val & 8) ? 1 : 0;
+}
+
+/**
+ *	siimage_mmio_dma_test_irq	-	check we caused an IRQ
+ *	@drive: drive we are testing
+ *
+ *	Check if we caused an IDE DMA interrupt. We may also have caused
+ *	SATA status interrupts, if so we clean them up and continue.
+ */
+
+static int siimage_mmio_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	void __iomem *sata_error_addr
+		= (void __iomem *)hwif->sata_scr[SATA_ERROR_OFFSET];
+
+	if (sata_error_addr) {
+		unsigned long base	= (unsigned long)hwif->hwif_data;
+		u32 ext_stat		= readl((void __iomem *)(base + 0x10));
+		u8 watchdog		= 0;
+
+		if (ext_stat & ((hwif->channel) ? 0x40 : 0x10)) {
+			u32 sata_error = readl(sata_error_addr);
+
+			writel(sata_error, sata_error_addr);
+			watchdog = (sata_error & 0x00680000) ? 1 : 0;
+			printk(KERN_WARNING "%s: sata_error = 0x%08x, "
+				"watchdog = %d, %s\n",
+				drive->name, sata_error, watchdog, __func__);
+		} else
+			watchdog = (ext_stat & 0x8000) ? 1 : 0;
+
+		ext_stat >>= 16;
+		if (!(ext_stat & 0x0404) && !watchdog)
+			return 0;
+	}
+
+	/* return 1 if INTR asserted */
+	if (readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS)) & 4)
+		return 1;
+
+	return 0;
+}
+
+static int siimage_dma_test_irq(ide_drive_t *drive)
+{
+	if (drive->hwif->host_flags & IDE_HFLAG_MMIO)
+		return siimage_mmio_dma_test_irq(drive);
+	else
+		return ide_dma_test_irq(drive);
+}
+
+/**
+ *	sil_sata_reset_poll	-	wait for SATA reset
+ *	@drive: drive we are resetting
+ *
+ *	Poll the SATA phy and see whether it has come back from the dead
+ *	yet.
+ */
+
+static blk_status_t sil_sata_reset_poll(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	void __iomem *sata_status_addr
+		= (void __iomem *)hwif->sata_scr[SATA_STATUS_OFFSET];
+
+	if (sata_status_addr) {
+		/* SATA Status is available only when in MMIO mode */
+		u32 sata_stat = readl(sata_status_addr);
+
+		if ((sata_stat & 0x03) != 0x03) {
+			printk(KERN_WARNING "%s: reset phy dead, status=0x%08x\n",
+					    hwif->name, sata_stat);
+			return BLK_STS_IOERR;
+		}
+	}
+
+	return BLK_STS_OK;
+}
+
+/**
+ *	sil_sata_pre_reset	-	reset hook
+ *	@drive: IDE device being reset
+ *
+ *	For the SATA devices we need to handle recalibration/geometry
+ *	differently
+ */
+
+static void sil_sata_pre_reset(ide_drive_t *drive)
+{
+	if (drive->media == ide_disk) {
+		drive->special_flags &=
+			~(IDE_SFLAG_SET_GEOMETRY | IDE_SFLAG_RECALIBRATE);
+	}
+}
+
+/**
+ *	init_chipset_siimage	-	set up an SI device
+ *	@dev: PCI device
+ *
+ *	Perform the initial PCI set up for this device. Attempt to switch
+ *	to 133 MHz clocking if the system isn't already set up to do it.
+ */
+
+static int init_chipset_siimage(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	void __iomem *ioaddr = host->host_priv;
+	unsigned long base, scsc_addr;
+	u8 rev = dev->revision, tmp;
+
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, rev ? 1 : 255);
+
+	if (ioaddr)
+		pci_set_master(dev);
+
+	base = (unsigned long)ioaddr;
+
+	if (ioaddr && pdev_is_sata(dev)) {
+		u32 tmp32, irq_mask;
+
+		/* make sure IDE0/1 interrupts are not masked */
+		irq_mask = (1 << 22) | (1 << 23);
+		tmp32 = readl(ioaddr + 0x48);
+		if (tmp32 & irq_mask) {
+			tmp32 &= ~irq_mask;
+			writel(tmp32, ioaddr + 0x48);
+			readl(ioaddr + 0x48); /* flush */
+		}
+		writel(0, ioaddr + 0x148);
+		writel(0, ioaddr + 0x1C8);
+	}
+
+	sil_iowrite8(dev, 0, base ? (base + 0xB4) : 0x80);
+	sil_iowrite8(dev, 0, base ? (base + 0xF4) : 0x84);
+
+	scsc_addr = base ? (base + 0x4A) : 0x8A;
+	tmp = sil_ioread8(dev, scsc_addr);
+
+	switch (tmp & 0x30) {
+	case 0x00:
+		/* On 100 MHz clocking, try and switch to 133 MHz */
+		sil_iowrite8(dev, tmp | 0x10, scsc_addr);
+		break;
+	case 0x30:
+		/* Clocking is disabled, attempt to force 133MHz clocking. */
+		sil_iowrite8(dev, tmp & ~0x20, scsc_addr);
+	case 0x10:
+		/* On 133Mhz clocking. */
+		break;
+	case 0x20:
+		/* On PCIx2 clocking. */
+		break;
+	}
+
+	tmp = sil_ioread8(dev, scsc_addr);
+
+	sil_iowrite8 (dev,       0x72, base + 0xA1);
+	sil_iowrite16(dev,     0x328A, base + 0xA2);
+	sil_iowrite32(dev, 0x62DD62DD, base + 0xA4);
+	sil_iowrite32(dev, 0x43924392, base + 0xA8);
+	sil_iowrite32(dev, 0x40094009, base + 0xAC);
+	sil_iowrite8 (dev,       0x72, base ? (base + 0xE1) : 0xB1);
+	sil_iowrite16(dev,     0x328A, base ? (base + 0xE2) : 0xB2);
+	sil_iowrite32(dev, 0x62DD62DD, base ? (base + 0xE4) : 0xB4);
+	sil_iowrite32(dev, 0x43924392, base ? (base + 0xE8) : 0xB8);
+	sil_iowrite32(dev, 0x40094009, base ? (base + 0xEC) : 0xBC);
+
+	if (base && pdev_is_sata(dev)) {
+		writel(0xFFFF0000, ioaddr + 0x108);
+		writel(0xFFFF0000, ioaddr + 0x188);
+		writel(0x00680000, ioaddr + 0x148);
+		writel(0x00680000, ioaddr + 0x1C8);
+	}
+
+	/* report the clocking mode of the controller */
+	if (!pdev_is_sata(dev)) {
+		static const char *clk_str[] =
+			{ "== 100", "== 133", "== 2X PCI", "DISABLED!" };
+
+		tmp >>= 4;
+		printk(KERN_INFO DRV_NAME " %s: BASE CLOCK %s\n",
+			pci_name(dev), clk_str[tmp & 3]);
+	}
+
+	return 0;
+}
+
+/**
+ *	init_mmio_iops_siimage	-	set up the iops for MMIO
+ *	@hwif: interface to set up
+ *
+ *	The basic setup here is fairly simple, we can use standard MMIO
+ *	operations. However we do have to set the taskfile register offsets
+ *	by hand as there isn't a standard defined layout for them this time.
+ *
+ *	The hardware supports buffered taskfiles and also some rather nice
+ *	extended PRD tables. For better SI3112 support use the libata driver
+ */
+
+static void init_mmio_iops_siimage(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	struct ide_host *host	= pci_get_drvdata(dev);
+	void *addr		= host->host_priv;
+	u8 ch			= hwif->channel;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	unsigned long base;
+
+	/*
+	 *	Fill in the basic hwif bits
+	 */
+	hwif->host_flags |= IDE_HFLAG_MMIO;
+
+	hwif->hwif_data	= addr;
+
+	/*
+	 *	Now set up the hw. We have to do this ourselves as the
+	 *	MMIO layout isn't the same as the standard port based I/O.
+	 */
+	memset(io_ports, 0, sizeof(*io_ports));
+
+	base = (unsigned long)addr;
+	if (ch)
+		base += 0xC0;
+	else
+		base += 0x80;
+
+	/*
+	 *	The buffered task file doesn't have status/control, so we
+	 *	can't currently use it sanely since we want to use LBA48 mode.
+	 */
+	io_ports->data_addr	= base;
+	io_ports->error_addr	= base + 1;
+	io_ports->nsect_addr	= base + 2;
+	io_ports->lbal_addr	= base + 3;
+	io_ports->lbam_addr	= base + 4;
+	io_ports->lbah_addr	= base + 5;
+	io_ports->device_addr	= base + 6;
+	io_ports->status_addr	= base + 7;
+	io_ports->ctl_addr	= base + 10;
+
+	if (pdev_is_sata(dev)) {
+		base = (unsigned long)addr;
+		if (ch)
+			base += 0x80;
+		hwif->sata_scr[SATA_STATUS_OFFSET]	= base + 0x104;
+		hwif->sata_scr[SATA_ERROR_OFFSET]	= base + 0x108;
+		hwif->sata_scr[SATA_CONTROL_OFFSET]	= base + 0x100;
+	}
+
+	hwif->irq = dev->irq;
+
+	hwif->dma_base = (unsigned long)addr + (ch ? 0x08 : 0x00);
+}
+
+static int is_dev_seagate_sata(ide_drive_t *drive)
+{
+	const char *s	= (const char *)&drive->id[ATA_ID_PROD];
+	unsigned len	= strnlen(s, ATA_ID_PROD_LEN);
+
+	if ((len > 4) && (!memcmp(s, "ST", 2)))
+		if ((!memcmp(s + len - 2, "AS", 2)) ||
+		    (!memcmp(s + len - 3, "ASL", 3))) {
+			printk(KERN_INFO "%s: applying pessimistic Seagate "
+					 "errata fix\n", drive->name);
+			return 1;
+		}
+
+	return 0;
+}
+
+/**
+ *	sil_quirkproc		-	post probe fixups
+ *	@drive: drive
+ *
+ *	Called after drive probe we use this to decide whether the
+ *	Seagate fixup must be applied. This used to be in init_iops but
+ *	that can occur before we know what drives are present.
+ */
+
+static void sil_quirkproc(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+
+	/* Try and rise the rqsize */
+	if (!is_sata(hwif) || !is_dev_seagate_sata(drive))
+		hwif->rqsize = 128;
+}
+
+/**
+ *	init_iops_siimage	-	set up iops
+ *	@hwif: interface to set up
+ *
+ *	Do the basic setup for the SIIMAGE hardware interface
+ *	and then do the MMIO setup if we can. This is the first
+ *	look in we get for setting up the hwif so that we
+ *	can get the iops right before using them.
+ */
+
+static void init_iops_siimage(ide_hwif_t *hwif)
+{
+	struct ide_host *host = dev_get_drvdata(hwif->dev);
+
+	hwif->hwif_data = NULL;
+
+	/* Pessimal until we finish probing */
+	hwif->rqsize = 15;
+
+	if (host->host_priv)
+		init_mmio_iops_siimage(hwif);
+}
+
+/**
+ *	sil_cable_detect	-	cable detection
+ *	@hwif: interface to check
+ *
+ *	Check for the presence of an ATA66 capable cable on the interface.
+ */
+
+static u8 sil_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long addr	= siimage_selreg(hwif, 0);
+	u8 ata66		= sil_ioread8(dev, addr);
+
+	return (ata66 & 0x01) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops sil_pata_port_ops = {
+	.set_pio_mode		= sil_set_pio_mode,
+	.set_dma_mode		= sil_set_dma_mode,
+	.quirkproc		= sil_quirkproc,
+	.test_irq		= sil_test_irq,
+	.udma_filter		= sil_pata_udma_filter,
+	.cable_detect		= sil_cable_detect,
+};
+
+static const struct ide_port_ops sil_sata_port_ops = {
+	.set_pio_mode		= sil_set_pio_mode,
+	.set_dma_mode		= sil_set_dma_mode,
+	.reset_poll		= sil_sata_reset_poll,
+	.pre_reset		= sil_sata_pre_reset,
+	.quirkproc		= sil_quirkproc,
+	.test_irq		= sil_test_irq,
+	.udma_filter		= sil_sata_udma_filter,
+	.cable_detect		= sil_cable_detect,
+};
+
+static const struct ide_dma_ops sil_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= ide_dma_end,
+	.dma_test_irq		= siimage_dma_test_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+#define DECLARE_SII_DEV(p_ops)				\
+	{						\
+		.name		= DRV_NAME,		\
+		.init_chipset	= init_chipset_siimage,	\
+		.init_iops	= init_iops_siimage,	\
+		.port_ops	= p_ops,		\
+		.dma_ops	= &sil_dma_ops,		\
+		.pio_mask	= ATA_PIO4,		\
+		.mwdma_mask	= ATA_MWDMA2,		\
+		.udma_mask	= ATA_UDMA6,		\
+	}
+
+static const struct ide_port_info siimage_chipsets[] = {
+	/* 0: SiI680 */  DECLARE_SII_DEV(&sil_pata_port_ops),
+	/* 1: SiI3112 */ DECLARE_SII_DEV(&sil_sata_port_ops)
+};
+
+/**
+ *	siimage_init_one	-	PCI layer discovery entry
+ *	@dev: PCI device
+ *	@id: ident table entry
+ *
+ *	Called by the PCI code when it finds an SiI680 or SiI3112 controller.
+ *	We then use the IDE PCI generic helper to do most of the work.
+ */
+
+static int siimage_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	void __iomem *ioaddr = NULL;
+	resource_size_t bar5 = pci_resource_start(dev, 5);
+	unsigned long barsize = pci_resource_len(dev, 5);
+	int rc;
+	struct ide_port_info d;
+	u8 idx = id->driver_data;
+	u8 BA5_EN;
+
+	d = siimage_chipsets[idx];
+
+	if (idx) {
+		static int first = 1;
+
+		if (first) {
+			printk(KERN_INFO DRV_NAME ": For full SATA support you "
+				"should use the libata sata_sil module.\n");
+			first = 0;
+		}
+
+		d.host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
+	}
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	pci_read_config_byte(dev, 0x8A, &BA5_EN);
+	if ((BA5_EN & 0x01) || bar5) {
+		/*
+		* Drop back to PIO if we can't map the MMIO. Some systems
+		* seem to get terminally confused in the PCI spaces.
+		*/
+		if (!request_mem_region(bar5, barsize, d.name)) {
+			printk(KERN_WARNING DRV_NAME " %s: MMIO ports not "
+				"available\n", pci_name(dev));
+		} else {
+			ioaddr = pci_ioremap_bar(dev, 5);
+			if (ioaddr == NULL)
+				release_mem_region(bar5, barsize);
+		}
+	}
+
+	rc = ide_pci_init_one(dev, &d, ioaddr);
+	if (rc) {
+		if (ioaddr) {
+			iounmap(ioaddr);
+			release_mem_region(bar5, barsize);
+		}
+		pci_disable_device(dev);
+	}
+
+	return rc;
+}
+
+static void siimage_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	void __iomem *ioaddr = host->host_priv;
+
+	ide_pci_remove(dev);
+
+	if (ioaddr) {
+		resource_size_t bar5 = pci_resource_start(dev, 5);
+		unsigned long barsize = pci_resource_len(dev, 5);
+
+		iounmap(ioaddr);
+		release_mem_region(bar5, barsize);
+	}
+
+	pci_disable_device(dev);
+}
+
+static const struct pci_device_id siimage_pci_tbl[] = {
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680),    0 },
+#ifdef CONFIG_BLK_DEV_IDE_SATA
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_3112),   1 },
+	{ PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_1210SA), 1 },
+#endif
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, siimage_pci_tbl);
+
+static struct pci_driver siimage_pci_driver = {
+	.name		= "SiI_IDE",
+	.id_table	= siimage_pci_tbl,
+	.probe		= siimage_init_one,
+	.remove		= siimage_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init siimage_ide_init(void)
+{
+	return ide_pci_register_driver(&siimage_pci_driver);
+}
+
+static void __exit siimage_ide_exit(void)
+{
+	pci_unregister_driver(&siimage_pci_driver);
+}
+
+module_init(siimage_ide_init);
+module_exit(siimage_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick, Alan Cox");
+MODULE_DESCRIPTION("PCI driver module for SiI IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c
new file mode 100644
index 000000000..1a700bef6
--- /dev/null
+++ b/drivers/ide/sis5513.c
@@ -0,0 +1,637 @@
+/*
+ * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2002		Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer
+ * Copyright (C) 2003		Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (C) 2007-2009	Bartlomiej Zolnierkiewicz
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ *
+ *
+ * Thanks :
+ *
+ * SiS Taiwan		: for direct support and hardware.
+ * Daniela Engert	: for initial ATA100 advices and numerous others.
+ * John Fremlin, Manfred Spraul, Dave Morgan, Peter Kjellerstedt	:
+ *			  for checking code correctness, providing patches.
+ *
+ *
+ * Original tests and design on the SiS620 chipset.
+ * ATA100 tests and design on the SiS735 chipset.
+ * ATA16/33 support from specs
+ * ATA133 support for SiS961/962 by L.C. Chang <lcchang@sis.com.tw>
+ * ATA133 961/962/963 fixes by Vojtech Pavlik <vojtech@suse.cz>
+ *
+ * Documentation:
+ *	SiS chipset documentation available under NDA to companies only
+ *      (not to individuals).
+ */
+
+/*
+ * The original SiS5513 comes from a SiS5511/55112/5513 chipset. The original
+ * SiS5513 was also used in the SiS5596/5513 chipset. Thus if we see a SiS5511
+ * or SiS5596, we can assume we see the first MWDMA-16 capable SiS5513 chip.
+ *
+ * Later SiS chipsets integrated the 5513 functionality into the NorthBridge,
+ * starting with SiS5571 and up to SiS745. The PCI ID didn't change, though. We
+ * can figure out that we have a more modern and more capable 5513 by looking
+ * for the respective NorthBridge IDs.
+ *
+ * Even later (96x family) SiS chipsets use the MuTIOL link and place the 5513
+ * into the SouthBrige. Here we cannot rely on looking up the NorthBridge PCI
+ * ID, while the now ATA-133 capable 5513 still has the same PCI ID.
+ * Fortunately the 5513 can be 'unmasked' by fiddling with some config space
+ * bits, changing its device id to the true one - 5517 for 961 and 5518 for
+ * 962/963.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#define DRV_NAME "sis5513"
+
+/* registers layout and init values are chipset family dependent */
+#undef ATA_16
+#define ATA_16		0x01
+#define ATA_33		0x02
+#define ATA_66		0x03
+#define ATA_100a	0x04 /* SiS730/SiS550 is ATA100 with ATA66 layout */
+#define ATA_100		0x05
+#define ATA_133a	0x06 /* SiS961b with 133 support */
+#define ATA_133		0x07 /* SiS962/963 */
+
+static u8 chipset_family;
+
+/*
+ * Devices supported
+ */
+static const struct {
+	const char *name;
+	u16 host_id;
+	u8 chipset_family;
+	u8 flags;
+} SiSHostChipInfo[] = {
+	{ "SiS968",	PCI_DEVICE_ID_SI_968,	ATA_133  },
+	{ "SiS966",	PCI_DEVICE_ID_SI_966,	ATA_133  },
+	{ "SiS965",	PCI_DEVICE_ID_SI_965,	ATA_133  },
+	{ "SiS745",	PCI_DEVICE_ID_SI_745,	ATA_100  },
+	{ "SiS735",	PCI_DEVICE_ID_SI_735,	ATA_100  },
+	{ "SiS733",	PCI_DEVICE_ID_SI_733,	ATA_100  },
+	{ "SiS635",	PCI_DEVICE_ID_SI_635,	ATA_100  },
+	{ "SiS633",	PCI_DEVICE_ID_SI_633,	ATA_100  },
+
+	{ "SiS730",	PCI_DEVICE_ID_SI_730,	ATA_100a },
+	{ "SiS550",	PCI_DEVICE_ID_SI_550,	ATA_100a },
+
+	{ "SiS640",	PCI_DEVICE_ID_SI_640,	ATA_66   },
+	{ "SiS630",	PCI_DEVICE_ID_SI_630,	ATA_66   },
+	{ "SiS620",	PCI_DEVICE_ID_SI_620,	ATA_66   },
+	{ "SiS540",	PCI_DEVICE_ID_SI_540,	ATA_66   },
+	{ "SiS530",	PCI_DEVICE_ID_SI_530,	ATA_66   },
+
+	{ "SiS5600",	PCI_DEVICE_ID_SI_5600,	ATA_33   },
+	{ "SiS5598",	PCI_DEVICE_ID_SI_5598,	ATA_33   },
+	{ "SiS5597",	PCI_DEVICE_ID_SI_5597,	ATA_33   },
+	{ "SiS5591/2",	PCI_DEVICE_ID_SI_5591,	ATA_33   },
+	{ "SiS5582",	PCI_DEVICE_ID_SI_5582,	ATA_33   },
+	{ "SiS5581",	PCI_DEVICE_ID_SI_5581,	ATA_33   },
+
+	{ "SiS5596",	PCI_DEVICE_ID_SI_5596,	ATA_16   },
+	{ "SiS5571",	PCI_DEVICE_ID_SI_5571,	ATA_16   },
+	{ "SiS5517",	PCI_DEVICE_ID_SI_5517,	ATA_16   },
+	{ "SiS551x",	PCI_DEVICE_ID_SI_5511,	ATA_16   },
+};
+
+/* Cycle time bits and values vary across chip dma capabilities
+   These three arrays hold the register layout and the values to set.
+   Indexed by chipset_family and (dma_mode - XFER_UDMA_0) */
+
+/* {0, ATA_16, ATA_33, ATA_66, ATA_100a, ATA_100, ATA_133} */
+static u8 cycle_time_offset[] = { 0, 0, 5, 4, 4, 0, 0 };
+static u8 cycle_time_range[]  = { 0, 0, 2, 3, 3, 4, 4 };
+static u8 cycle_time_value[][XFER_UDMA_6 - XFER_UDMA_0 + 1] = {
+	{  0,  0, 0, 0, 0, 0, 0 }, /* no UDMA */
+	{  0,  0, 0, 0, 0, 0, 0 }, /* no UDMA */
+	{  3,  2, 1, 0, 0, 0, 0 }, /* ATA_33 */
+	{  7,  5, 3, 2, 1, 0, 0 }, /* ATA_66 */
+	{  7,  5, 3, 2, 1, 0, 0 }, /* ATA_100a (730 specific),
+				      different cycle_time range and offset */
+	{ 11,  7, 5, 4, 2, 1, 0 }, /* ATA_100 */
+	{ 15, 10, 7, 5, 3, 2, 1 }, /* ATA_133a (earliest 691 southbridges) */
+	{ 15, 10, 7, 5, 3, 2, 1 }, /* ATA_133 */
+};
+/* CRC Valid Setup Time vary across IDE clock setting 33/66/100/133
+   See SiS962 data sheet for more detail */
+static u8 cvs_time_value[][XFER_UDMA_6 - XFER_UDMA_0 + 1] = {
+	{ 0, 0, 0, 0, 0, 0, 0 }, /* no UDMA */
+	{ 0, 0, 0, 0, 0, 0, 0 }, /* no UDMA */
+	{ 2, 1, 1, 0, 0, 0, 0 },
+	{ 4, 3, 2, 1, 0, 0, 0 },
+	{ 4, 3, 2, 1, 0, 0, 0 },
+	{ 6, 4, 3, 1, 1, 1, 0 },
+	{ 9, 6, 4, 2, 2, 2, 2 },
+	{ 9, 6, 4, 2, 2, 2, 2 },
+};
+/* Initialize time, Active time, Recovery time vary across
+   IDE clock settings. These 3 arrays hold the register value
+   for PIO0/1/2/3/4 and DMA0/1/2 mode in order */
+static u8 ini_time_value[][8] = {
+	{ 0, 0, 0, 0, 0, 0, 0, 0 },
+	{ 0, 0, 0, 0, 0, 0, 0, 0 },
+	{ 2, 1, 0, 0, 0, 1, 0, 0 },
+	{ 4, 3, 1, 1, 1, 3, 1, 1 },
+	{ 4, 3, 1, 1, 1, 3, 1, 1 },
+	{ 6, 4, 2, 2, 2, 4, 2, 2 },
+	{ 9, 6, 3, 3, 3, 6, 3, 3 },
+	{ 9, 6, 3, 3, 3, 6, 3, 3 },
+};
+static u8 act_time_value[][8] = {
+	{  0,  0,  0,  0, 0,  0,  0, 0 },
+	{  0,  0,  0,  0, 0,  0,  0, 0 },
+	{  9,  9,  9,  2, 2,  7,  2, 2 },
+	{ 19, 19, 19,  5, 4, 14,  5, 4 },
+	{ 19, 19, 19,  5, 4, 14,  5, 4 },
+	{ 28, 28, 28,  7, 6, 21,  7, 6 },
+	{ 38, 38, 38, 10, 9, 28, 10, 9 },
+	{ 38, 38, 38, 10, 9, 28, 10, 9 },
+};
+static u8 rco_time_value[][8] = {
+	{  0,  0, 0,  0, 0,  0,  0, 0 },
+	{  0,  0, 0,  0, 0,  0,  0, 0 },
+	{  9,  2, 0,  2, 0,  7,  1, 1 },
+	{ 19,  5, 1,  5, 2, 16,  3, 2 },
+	{ 19,  5, 1,  5, 2, 16,  3, 2 },
+	{ 30,  9, 3,  9, 4, 25,  6, 4 },
+	{ 40, 12, 4, 12, 5, 34, 12, 5 },
+	{ 40, 12, 4, 12, 5, 34, 12, 5 },
+};
+
+/*
+ * Printing configuration
+ */
+/* Used for chipset type printing at boot time */
+static char *chipset_capability[] = {
+	"ATA", "ATA 16",
+	"ATA 33", "ATA 66",
+	"ATA 100 (1st gen)", "ATA 100 (2nd gen)",
+	"ATA 133 (1st gen)", "ATA 133 (2nd gen)"
+};
+
+/*
+ * Configuration functions
+ */
+
+static u8 sis_ata133_get_base(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u32 reg54 = 0;
+
+	pci_read_config_dword(dev, 0x54, &reg54);
+
+	return ((reg54 & 0x40000000) ? 0x70 : 0x40) + drive->dn * 4;
+}
+
+static void sis_ata16_program_timings(ide_drive_t *drive, const u8 mode)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u16 t1 = 0;
+	u8 drive_pci = 0x40 + drive->dn * 2;
+
+	const u16 pio_timings[]   = { 0x000, 0x607, 0x404, 0x303, 0x301 };
+	const u16 mwdma_timings[] = { 0x008, 0x302, 0x301 };
+
+	pci_read_config_word(dev, drive_pci, &t1);
+
+	/* clear active/recovery timings */
+	t1 &= ~0x070f;
+	if (mode >= XFER_MW_DMA_0) {
+		if (chipset_family > ATA_16)
+			t1 &= ~0x8000;	/* disable UDMA */
+		t1 |= mwdma_timings[mode - XFER_MW_DMA_0];
+	} else
+		t1 |= pio_timings[mode - XFER_PIO_0];
+
+	pci_write_config_word(dev, drive_pci, t1);
+}
+
+static void sis_ata100_program_timings(ide_drive_t *drive, const u8 mode)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u8 t1, drive_pci = 0x40 + drive->dn * 2;
+
+	/* timing bits: 7:4 active 3:0 recovery */
+	const u8 pio_timings[]   = { 0x00, 0x67, 0x44, 0x33, 0x31 };
+	const u8 mwdma_timings[] = { 0x08, 0x32, 0x31 };
+
+	if (mode >= XFER_MW_DMA_0) {
+		u8 t2 = 0;
+
+		pci_read_config_byte(dev, drive_pci, &t2);
+		t2 &= ~0x80;	/* disable UDMA */
+		pci_write_config_byte(dev, drive_pci, t2);
+
+		t1 = mwdma_timings[mode - XFER_MW_DMA_0];
+	} else
+		t1 = pio_timings[mode - XFER_PIO_0];
+
+	pci_write_config_byte(dev, drive_pci + 1, t1);
+}
+
+static void sis_ata133_program_timings(ide_drive_t *drive, const u8 mode)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u32 t1 = 0;
+	u8 drive_pci = sis_ata133_get_base(drive), clk, idx;
+
+	pci_read_config_dword(dev, drive_pci, &t1);
+
+	t1 &= 0xc0c00fff;
+	clk = (t1 & 0x08) ? ATA_133 : ATA_100;
+	if (mode >= XFER_MW_DMA_0) {
+		t1 &= ~0x04;	/* disable UDMA */
+		idx = mode - XFER_MW_DMA_0 + 5;
+	} else
+		idx = mode - XFER_PIO_0;
+	t1 |= ini_time_value[clk][idx] << 12;
+	t1 |= act_time_value[clk][idx] << 16;
+	t1 |= rco_time_value[clk][idx] << 24;
+
+	pci_write_config_dword(dev, drive_pci, t1);
+}
+
+static void sis_program_timings(ide_drive_t *drive, const u8 mode)
+{
+	if (chipset_family < ATA_100)		/* ATA_16/33/66/100a */
+		sis_ata16_program_timings(drive, mode);
+	else if (chipset_family < ATA_133)	/* ATA_100/133a */
+		sis_ata100_program_timings(drive, mode);
+	else					/* ATA_133 */
+		sis_ata133_program_timings(drive, mode);
+}
+
+static void config_drive_art_rwp(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 reg4bh		= 0;
+	u8 rw_prefetch		= 0;
+
+	pci_read_config_byte(dev, 0x4b, &reg4bh);
+
+	rw_prefetch = reg4bh & ~(0x11 << drive->dn);
+
+	if (drive->media == ide_disk)
+		rw_prefetch |= 0x11 << drive->dn;
+
+	if (reg4bh != rw_prefetch)
+		pci_write_config_byte(dev, 0x4b, rw_prefetch);
+}
+
+static void sis_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	config_drive_art_rwp(drive);
+	sis_program_timings(drive, drive->pio_mode);
+}
+
+static void sis_ata133_program_udma_timings(ide_drive_t *drive, const u8 mode)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u32 regdw = 0;
+	u8 drive_pci = sis_ata133_get_base(drive), clk, idx;
+
+	pci_read_config_dword(dev, drive_pci, &regdw);
+
+	regdw |= 0x04;
+	regdw &= 0xfffff00f;
+	/* check if ATA133 enable */
+	clk = (regdw & 0x08) ? ATA_133 : ATA_100;
+	idx = mode - XFER_UDMA_0;
+	regdw |= cycle_time_value[clk][idx] << 4;
+	regdw |= cvs_time_value[clk][idx] << 8;
+
+	pci_write_config_dword(dev, drive_pci, regdw);
+}
+
+static void sis_ata33_program_udma_timings(ide_drive_t *drive, const u8 mode)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u8 drive_pci = 0x40 + drive->dn * 2, reg = 0, i = chipset_family;
+
+	pci_read_config_byte(dev, drive_pci + 1, &reg);
+
+	/* force the UDMA bit on if we want to use UDMA */
+	reg |= 0x80;
+	/* clean reg cycle time bits */
+	reg &= ~((0xff >> (8 - cycle_time_range[i])) << cycle_time_offset[i]);
+	/* set reg cycle time bits */
+	reg |= cycle_time_value[i][mode - XFER_UDMA_0] << cycle_time_offset[i];
+
+	pci_write_config_byte(dev, drive_pci + 1, reg);
+}
+
+static void sis_program_udma_timings(ide_drive_t *drive, const u8 mode)
+{
+	if (chipset_family >= ATA_133)	/* ATA_133 */
+		sis_ata133_program_udma_timings(drive, mode);
+	else				/* ATA_33/66/100a/100/133a */
+		sis_ata33_program_udma_timings(drive, mode);
+}
+
+static void sis_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	const u8 speed = drive->dma_mode;
+
+	if (speed >= XFER_UDMA_0)
+		sis_program_udma_timings(drive, speed);
+	else
+		sis_program_timings(drive, speed);
+}
+
+static u8 sis_ata133_udma_filter(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u32 regdw = 0;
+	u8 drive_pci = sis_ata133_get_base(drive);
+
+	pci_read_config_dword(dev, drive_pci, &regdw);
+
+	/* if ATA133 disable, we should not set speed above UDMA5 */
+	return (regdw & 0x08) ? ATA_UDMA6 : ATA_UDMA5;
+}
+
+static int sis_find_family(struct pci_dev *dev)
+{
+	struct pci_dev *host;
+	int i = 0;
+
+	chipset_family = 0;
+
+	for (i = 0; i < ARRAY_SIZE(SiSHostChipInfo) && !chipset_family; i++) {
+
+		host = pci_get_device(PCI_VENDOR_ID_SI, SiSHostChipInfo[i].host_id, NULL);
+
+		if (!host)
+			continue;
+
+		chipset_family = SiSHostChipInfo[i].chipset_family;
+
+		/* Special case for SiS630 : 630S/ET is ATA_100a */
+		if (SiSHostChipInfo[i].host_id == PCI_DEVICE_ID_SI_630) {
+			if (host->revision >= 0x30)
+				chipset_family = ATA_100a;
+		}
+		pci_dev_put(host);
+
+		printk(KERN_INFO DRV_NAME " %s: %s %s controller\n",
+			pci_name(dev), SiSHostChipInfo[i].name,
+			chipset_capability[chipset_family]);
+	}
+
+	if (!chipset_family) { /* Belongs to pci-quirks */
+
+			u32 idemisc;
+			u16 trueid;
+
+			/* Disable ID masking and register remapping */
+			pci_read_config_dword(dev, 0x54, &idemisc);
+			pci_write_config_dword(dev, 0x54, (idemisc & 0x7fffffff));
+			pci_read_config_word(dev, PCI_DEVICE_ID, &trueid);
+			pci_write_config_dword(dev, 0x54, idemisc);
+
+			if (trueid == 0x5518) {
+				printk(KERN_INFO DRV_NAME " %s: SiS 962/963 MuTIOL IDE UDMA133 controller\n",
+					pci_name(dev));
+				chipset_family = ATA_133;
+
+				/* Check for 5513 compatibility mapping
+				 * We must use this, else the port enabled code will fail,
+				 * as it expects the enablebits at 0x4a.
+				 */
+				if ((idemisc & 0x40000000) == 0) {
+					pci_write_config_dword(dev, 0x54, idemisc | 0x40000000);
+					printk(KERN_INFO DRV_NAME " %s: Switching to 5513 register mapping\n",
+						pci_name(dev));
+				}
+			}
+	}
+
+	if (!chipset_family) { /* Belongs to pci-quirks */
+
+			struct pci_dev *lpc_bridge;
+			u16 trueid;
+			u8 prefctl;
+			u8 idecfg;
+
+			pci_read_config_byte(dev, 0x4a, &idecfg);
+			pci_write_config_byte(dev, 0x4a, idecfg | 0x10);
+			pci_read_config_word(dev, PCI_DEVICE_ID, &trueid);
+			pci_write_config_byte(dev, 0x4a, idecfg);
+
+			if (trueid == 0x5517) { /* SiS 961/961B */
+
+				lpc_bridge = pci_get_slot(dev->bus, 0x10); /* Bus 0, Dev 2, Fn 0 */
+				pci_read_config_byte(dev, 0x49, &prefctl);
+				pci_dev_put(lpc_bridge);
+
+				if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) {
+					printk(KERN_INFO DRV_NAME " %s: SiS 961B MuTIOL IDE UDMA133 controller\n",
+						pci_name(dev));
+					chipset_family = ATA_133a;
+				} else {
+					printk(KERN_INFO DRV_NAME " %s: SiS 961 MuTIOL IDE UDMA100 controller\n",
+						pci_name(dev));
+					chipset_family = ATA_100;
+				}
+			}
+	}
+
+	return chipset_family;
+}
+
+static int init_chipset_sis5513(struct pci_dev *dev)
+{
+	/* Make general config ops here
+	   1/ tell IDE channels to operate in Compatibility mode only
+	   2/ tell old chips to allow per drive IDE timings */
+
+	u8 reg;
+	u16 regw;
+
+	switch (chipset_family) {
+	case ATA_133:
+		/* SiS962 operation mode */
+		pci_read_config_word(dev, 0x50, &regw);
+		if (regw & 0x08)
+			pci_write_config_word(dev, 0x50, regw&0xfff7);
+		pci_read_config_word(dev, 0x52, &regw);
+		if (regw & 0x08)
+			pci_write_config_word(dev, 0x52, regw&0xfff7);
+		break;
+	case ATA_133a:
+	case ATA_100:
+		/* Fixup latency */
+		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x80);
+		/* Set compatibility bit */
+		pci_read_config_byte(dev, 0x49, &reg);
+		if (!(reg & 0x01))
+			pci_write_config_byte(dev, 0x49, reg|0x01);
+		break;
+	case ATA_100a:
+	case ATA_66:
+		/* Fixup latency */
+		pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x10);
+
+		/* On ATA_66 chips the bit was elsewhere */
+		pci_read_config_byte(dev, 0x52, &reg);
+		if (!(reg & 0x04))
+			pci_write_config_byte(dev, 0x52, reg|0x04);
+		break;
+	case ATA_33:
+		/* On ATA_33 we didn't have a single bit to set */
+		pci_read_config_byte(dev, 0x09, &reg);
+		if ((reg & 0x0f) != 0x00)
+			pci_write_config_byte(dev, 0x09, reg&0xf0);
+		fallthrough;
+	case ATA_16:
+		/* force per drive recovery and active timings
+		   needed on ATA_33 and below chips */
+		pci_read_config_byte(dev, 0x52, &reg);
+		if (!(reg & 0x08))
+			pci_write_config_byte(dev, 0x52, reg|0x08);
+		break;
+	}
+
+	return 0;
+}
+
+struct sis_laptop {
+	u16 device;
+	u16 subvendor;
+	u16 subdevice;
+};
+
+static const struct sis_laptop sis_laptop[] = {
+	/* devid, subvendor, subdev */
+	{ 0x5513, 0x1043, 0x1107 },	/* ASUS A6K */
+	{ 0x5513, 0x1734, 0x105f },	/* FSC Amilo A1630 */
+	{ 0x5513, 0x1071, 0x8640 },     /* EasyNote K5305 */
+	/* end marker */
+	{ 0, }
+};
+
+static u8 sis_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	const struct sis_laptop *lap = &sis_laptop[0];
+	u8 ata66 = 0;
+
+	while (lap->device) {
+		if (lap->device == pdev->device &&
+		    lap->subvendor == pdev->subsystem_vendor &&
+		    lap->subdevice == pdev->subsystem_device)
+			return ATA_CBL_PATA40_SHORT;
+		lap++;
+	}
+
+	if (chipset_family >= ATA_133) {
+		u16 regw = 0;
+		u16 reg_addr = hwif->channel ? 0x52: 0x50;
+		pci_read_config_word(pdev, reg_addr, &regw);
+		ata66 = (regw & 0x8000) ? 0 : 1;
+	} else if (chipset_family >= ATA_66) {
+		u8 reg48h = 0;
+		u8 mask = hwif->channel ? 0x20 : 0x10;
+		pci_read_config_byte(pdev, 0x48, &reg48h);
+		ata66 = (reg48h & mask) ? 0 : 1;
+	}
+
+	return ata66 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops sis_port_ops = {
+	.set_pio_mode		= sis_set_pio_mode,
+	.set_dma_mode		= sis_set_dma_mode,
+	.cable_detect		= sis_cable_detect,
+};
+
+static const struct ide_port_ops sis_ata133_port_ops = {
+	.set_pio_mode		= sis_set_pio_mode,
+	.set_dma_mode		= sis_set_dma_mode,
+	.udma_filter		= sis_ata133_udma_filter,
+	.cable_detect		= sis_cable_detect,
+};
+
+static const struct ide_port_info sis5513_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_sis5513,
+	.enablebits	= { {0x4a, 0x02, 0x02}, {0x4a, 0x04, 0x04} },
+	.host_flags	= IDE_HFLAG_NO_AUTODMA,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+static int sis5513_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d = sis5513_chipset;
+	u8 udma_rates[] = { 0x00, 0x00, 0x07, 0x1f, 0x3f, 0x3f, 0x7f, 0x7f };
+	int rc;
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		return rc;
+
+	if (sis_find_family(dev) == 0)
+		return -ENOTSUPP;
+
+	if (chipset_family >= ATA_133)
+		d.port_ops = &sis_ata133_port_ops;
+	else
+		d.port_ops = &sis_port_ops;
+
+	d.udma_mask = udma_rates[chipset_family];
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static void sis5513_remove(struct pci_dev *dev)
+{
+	ide_pci_remove(dev);
+	pci_disable_device(dev);
+}
+
+static const struct pci_device_id sis5513_pci_tbl[] = {
+	{ PCI_VDEVICE(SI, PCI_DEVICE_ID_SI_5513), 0 },
+	{ PCI_VDEVICE(SI, PCI_DEVICE_ID_SI_5518), 0 },
+	{ PCI_VDEVICE(SI, PCI_DEVICE_ID_SI_1180), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, sis5513_pci_tbl);
+
+static struct pci_driver sis5513_pci_driver = {
+	.name		= "SIS_IDE",
+	.id_table	= sis5513_pci_tbl,
+	.probe		= sis5513_init_one,
+	.remove		= sis5513_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init sis5513_ide_init(void)
+{
+	return ide_pci_register_driver(&sis5513_pci_driver);
+}
+
+static void __exit sis5513_ide_exit(void)
+{
+	pci_unregister_driver(&sis5513_pci_driver);
+}
+
+module_init(sis5513_ide_init);
+module_exit(sis5513_ide_exit);
+
+MODULE_AUTHOR("Lionel Bouton, L C Chang, Andre Hedrick, Vojtech Pavlik");
+MODULE_DESCRIPTION("PCI driver module for SIS IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
new file mode 100644
index 000000000..5c24c420c
--- /dev/null
+++ b/drivers/ide/sl82c105.c
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SL82C105/Winbond 553 IDE driver
+ *
+ * Maintainer unknown.
+ *
+ * Drive tuning added from Rebel.com's kernel sources
+ *  -- Russell King (15/11/98) linux@arm.linux.org.uk
+ * 
+ * Merge in Russell's HW workarounds, fix various problems
+ * with the timing registers setup.
+ *  -- Benjamin Herrenschmidt (01/11/03) benh@kernel.crashing.org
+ *
+ * Copyright (C) 2006-2007,2009 MontaVista Software, Inc. <source@mvista.com>
+ * Copyright (C)      2007 Bartlomiej Zolnierkiewicz
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "sl82c105"
+
+/*
+ * SL82C105 PCI config register 0x40 bits.
+ */
+#define CTRL_IDE_IRQB   (1 << 30)
+#define CTRL_IDE_IRQA   (1 << 28)
+#define CTRL_LEGIRQ     (1 << 11)
+#define CTRL_P1F16      (1 << 5)
+#define CTRL_P1EN       (1 << 4)
+#define CTRL_P0F16      (1 << 1)
+#define CTRL_P0EN       (1 << 0)
+
+/*
+ * Convert a PIO mode and cycle time to the required on/off times
+ * for the interface.  This has protection against runaway timings.
+ */
+static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
+{
+	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+	unsigned int cmd_on, cmd_off;
+	u8 iordy = 0;
+
+	cmd_on  = (t->active + 29) / 30;
+	cmd_off = (ide_pio_cycle_time(drive, pio) - 30 * cmd_on + 29) / 30;
+
+	if (cmd_on == 0)
+		cmd_on = 1;
+
+	if (cmd_off == 0)
+		cmd_off = 1;
+
+	if (ide_pio_need_iordy(drive, pio))
+		iordy = 0x40;
+
+	return (cmd_on - 1) << 8 | (cmd_off - 1) | iordy;
+}
+
+/*
+ * Configure the chipset for PIO mode.
+ */
+static void sl82c105_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long timings	= (unsigned long)ide_get_drivedata(drive);
+	int reg			= 0x44 + drive->dn * 4;
+	u16 drv_ctrl;
+	const u8 pio		= drive->pio_mode - XFER_PIO_0;
+
+	drv_ctrl = get_pio_timings(drive, pio);
+
+	/*
+	 * Store the PIO timings so that we can restore them
+	 * in case DMA will be turned off...
+	 */
+	timings &= 0xffff0000;
+	timings |= drv_ctrl;
+	ide_set_drivedata(drive, (void *)timings);
+
+	pci_write_config_word(dev, reg,  drv_ctrl);
+	pci_read_config_word (dev, reg, &drv_ctrl);
+
+	printk(KERN_DEBUG "%s: selected %s (%dns) (%04X)\n", drive->name,
+			  ide_xfer_verbose(pio + XFER_PIO_0),
+			  ide_pio_cycle_time(drive, pio), drv_ctrl);
+}
+
+/*
+ * Configure the chipset for DMA mode.
+ */
+static void sl82c105_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200};
+	unsigned long timings = (unsigned long)ide_get_drivedata(drive);
+	u16 drv_ctrl;
+	const u8 speed = drive->dma_mode;
+
+	drv_ctrl = mwdma_timings[speed - XFER_MW_DMA_0];
+
+	/*
+	 * Store the DMA timings so that we can actually program
+	 * them when DMA will be turned on...
+	 */
+	timings &= 0x0000ffff;
+	timings |= (unsigned long)drv_ctrl << 16;
+	ide_set_drivedata(drive, (void *)timings);
+}
+
+static int sl82c105_test_irq(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u32 val, mask		= hwif->channel ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
+
+	pci_read_config_dword(dev, 0x40, &val);
+
+	return (val & mask) ? 1 : 0;
+}
+
+/*
+ * The SL82C105 holds off all IDE interrupts while in DMA mode until
+ * all DMA activity is completed.  Sometimes this causes problems (eg,
+ * when the drive wants to report an error condition).
+ *
+ * 0x7e is a "chip testing" register.  Bit 2 resets the DMA controller
+ * state machine.  We need to kick this to work around various bugs.
+ */
+static inline void sl82c105_reset_host(struct pci_dev *dev)
+{
+	u16 val;
+
+	pci_read_config_word(dev, 0x7e, &val);
+	pci_write_config_word(dev, 0x7e, val | (1 << 2));
+	pci_write_config_word(dev, 0x7e, val & ~(1 << 2));
+}
+
+/*
+ * If we get an IRQ timeout, it might be that the DMA state machine
+ * got confused.  Fix from Todd Inglett.  Details from Winbond.
+ *
+ * This function is called when the IDE timer expires, the drive
+ * indicates that it is READY, and we were waiting for DMA to complete.
+ */
+static void sl82c105_dma_lost_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u32 val, mask		= hwif->channel ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
+	u8 dma_cmd;
+
+	printk(KERN_WARNING "sl82c105: lost IRQ, resetting host\n");
+
+	/*
+	 * Check the raw interrupt from the drive.
+	 */
+	pci_read_config_dword(dev, 0x40, &val);
+	if (val & mask)
+		printk(KERN_INFO "sl82c105: drive was requesting IRQ, "
+		       "but host lost it\n");
+
+	/*
+	 * Was DMA enabled?  If so, disable it - we're resetting the
+	 * host.  The IDE layer will be handling the drive for us.
+	 */
+	dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
+	if (dma_cmd & 1) {
+		outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+		printk(KERN_INFO "sl82c105: DMA was enabled\n");
+	}
+
+	sl82c105_reset_host(dev);
+}
+
+/*
+ * ATAPI devices can cause the SL82C105 DMA state machine to go gaga.
+ * Winbond recommend that the DMA state machine is reset prior to
+ * setting the bus master DMA enable bit.
+ *
+ * The generic IDE core will have disabled the BMEN bit before this
+ * function is called.
+ */
+static void sl82c105_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int reg 		= 0x44 + drive->dn * 4;
+
+	pci_write_config_word(dev, reg,
+			      (unsigned long)ide_get_drivedata(drive) >> 16);
+
+	sl82c105_reset_host(dev);
+	ide_dma_start(drive);
+}
+
+static void sl82c105_dma_clear(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+
+	sl82c105_reset_host(dev);
+}
+
+static int sl82c105_dma_end(ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(drive->hwif->dev);
+	int reg 		= 0x44 + drive->dn * 4;
+	int ret			= ide_dma_end(drive);
+
+	pci_write_config_word(dev, reg,
+			      (unsigned long)ide_get_drivedata(drive));
+
+	return ret;
+}
+
+/*
+ * ATA reset will clear the 16 bits mode in the control
+ * register, we need to reprogram it
+ */
+static void sl82c105_resetproc(ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	u32 val;
+
+	pci_read_config_dword(dev, 0x40, &val);
+	val |= (CTRL_P1F16 | CTRL_P0F16);
+	pci_write_config_dword(dev, 0x40, val);
+}
+
+/*
+ * Return the revision of the Winbond bridge
+ * which this function is part of.
+ */
+static u8 sl82c105_bridge_revision(struct pci_dev *dev)
+{
+	struct pci_dev *bridge;
+
+	/*
+	 * The bridge should be part of the same device, but function 0.
+	 */
+	bridge = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus),
+					dev->bus->number,
+					PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
+	if (!bridge)
+		return -1;
+
+	/*
+	 * Make sure it is a Winbond 553 and is an ISA bridge.
+	 */
+	if (bridge->vendor != PCI_VENDOR_ID_WINBOND ||
+	    bridge->device != PCI_DEVICE_ID_WINBOND_83C553 ||
+	    bridge->class >> 8 != PCI_CLASS_BRIDGE_ISA) {
+	    	pci_dev_put(bridge);
+		return -1;
+	}
+	/*
+	 * We need to find function 0's revision, not function 1
+	 */
+	pci_dev_put(bridge);
+
+	return bridge->revision;
+}
+
+/*
+ * Enable the PCI device
+ * 
+ * --BenH: It's arch fixup code that should enable channels that
+ * have not been enabled by firmware. I decided we can still enable
+ * channel 0 here at least, but channel 1 has to be enabled by
+ * firmware or arch code. We still set both to 16 bits mode.
+ */
+static int init_chipset_sl82c105(struct pci_dev *dev)
+{
+	u32 val;
+
+	pci_read_config_dword(dev, 0x40, &val);
+	val |= CTRL_P0EN | CTRL_P0F16 | CTRL_P1F16;
+	pci_write_config_dword(dev, 0x40, val);
+
+	return 0;
+}
+
+static const struct ide_port_ops sl82c105_port_ops = {
+	.set_pio_mode		= sl82c105_set_pio_mode,
+	.set_dma_mode		= sl82c105_set_dma_mode,
+	.resetproc		= sl82c105_resetproc,
+	.test_irq		= sl82c105_test_irq,
+};
+
+static const struct ide_dma_ops sl82c105_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= sl82c105_dma_start,
+	.dma_end		= sl82c105_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= sl82c105_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_clear		= sl82c105_dma_clear,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info sl82c105_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_sl82c105,
+	.enablebits	= {{0x40,0x01,0x01}, {0x40,0x10,0x10}},
+	.port_ops	= &sl82c105_port_ops,
+	.dma_ops	= &sl82c105_dma_ops,
+	.host_flags	= IDE_HFLAG_IO_32BIT |
+			  IDE_HFLAG_UNMASK_IRQS |
+			  IDE_HFLAG_SERIALIZE_DMA |
+			  IDE_HFLAG_NO_AUTODMA,
+	.pio_mask	= ATA_PIO5,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+static int sl82c105_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct ide_port_info d = sl82c105_chipset;
+	u8 rev = sl82c105_bridge_revision(dev);
+
+	if (rev <= 5) {
+		/*
+		 * Never ever EVER under any circumstances enable
+		 * DMA when the bridge is this old.
+		 */
+		printk(KERN_INFO DRV_NAME ": Winbond W83C553 bridge "
+				 "revision %d, BM-DMA disabled\n", rev);
+		d.dma_ops = NULL;
+		d.mwdma_mask = 0;
+		d.host_flags &= ~IDE_HFLAG_SERIALIZE_DMA;
+	}
+
+	return ide_pci_init_one(dev, &d, NULL);
+}
+
+static const struct pci_device_id sl82c105_pci_tbl[] = {
+	{ PCI_VDEVICE(WINBOND, PCI_DEVICE_ID_WINBOND_82C105), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, sl82c105_pci_tbl);
+
+static struct pci_driver sl82c105_pci_driver = {
+	.name		= "W82C105_IDE",
+	.id_table	= sl82c105_pci_tbl,
+	.probe		= sl82c105_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init sl82c105_ide_init(void)
+{
+	return ide_pci_register_driver(&sl82c105_pci_driver);
+}
+
+static void __exit sl82c105_ide_exit(void)
+{
+	pci_unregister_driver(&sl82c105_pci_driver);
+}
+
+module_init(sl82c105_ide_init);
+module_exit(sl82c105_ide_exit);
+
+MODULE_DESCRIPTION("PCI driver module for W82C105 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c
new file mode 100644
index 000000000..f521d5ebf
--- /dev/null
+++ b/drivers/ide/slc90e66.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
+ *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
+ *
+ * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
+ * but this keeps the ISA-Bridge and slots alive.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "slc90e66"
+
+static DEFINE_SPINLOCK(slc90e66_lock);
+
+static void slc90e66_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	int is_slave		= drive->dn & 1;
+	int master_port		= hwif->channel ? 0x42 : 0x40;
+	int slave_port		= 0x44;
+	unsigned long flags;
+	u16 master_data;
+	u8 slave_data;
+	int control = 0;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+				     /* ISP  RTC */
+	static const u8 timings[][2] = {
+					{ 0, 0 },
+					{ 0, 0 },
+					{ 1, 0 },
+					{ 2, 1 },
+					{ 2, 3 }, };
+
+	spin_lock_irqsave(&slc90e66_lock, flags);
+	pci_read_config_word(dev, master_port, &master_data);
+
+	if (pio > 1)
+		control |= 1;	/* Programmable timing on */
+	if (drive->media == ide_disk)
+		control |= 4;	/* Prefetch, post write */
+	if (ide_pio_need_iordy(drive, pio))
+		control |= 2;	/* IORDY */
+	if (is_slave) {
+		master_data |=  0x4000;
+		master_data &= ~0x0070;
+		if (pio > 1) {
+			/* Set PPE, IE and TIME */
+			master_data |= control << 4;
+		}
+		pci_read_config_byte(dev, slave_port, &slave_data);
+		slave_data &= hwif->channel ? 0x0f : 0xf0;
+		slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) <<
+			       (hwif->channel ? 4 : 0);
+	} else {
+		master_data &= ~0x3307;
+		if (pio > 1) {
+			/* enable PPE, IE and TIME */
+			master_data |= control;
+		}
+		master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8);
+	}
+	pci_write_config_word(dev, master_port, master_data);
+	if (is_slave)
+		pci_write_config_byte(dev, slave_port, slave_data);
+	spin_unlock_irqrestore(&slc90e66_lock, flags);
+}
+
+static void slc90e66_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	u8 maslave		= hwif->channel ? 0x42 : 0x40;
+	int sitre = 0, a_speed	= 7 << (drive->dn * 4);
+	int u_speed = 0, u_flag = 1 << drive->dn;
+	u16			reg4042, reg44, reg48, reg4a;
+	const u8 speed		= drive->dma_mode;
+
+	pci_read_config_word(dev, maslave, &reg4042);
+	sitre = (reg4042 & 0x4000) ? 1 : 0;
+	pci_read_config_word(dev, 0x44, &reg44);
+	pci_read_config_word(dev, 0x48, &reg48);
+	pci_read_config_word(dev, 0x4a, &reg4a);
+
+	if (speed >= XFER_UDMA_0) {
+		u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4);
+
+		if (!(reg48 & u_flag))
+			pci_write_config_word(dev, 0x48, reg48|u_flag);
+		if ((reg4a & a_speed) != u_speed) {
+			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+			pci_read_config_word(dev, 0x4a, &reg4a);
+			pci_write_config_word(dev, 0x4a, reg4a|u_speed);
+		}
+	} else {
+		const u8 mwdma_to_pio[] = { 0, 3, 4 };
+
+		if (reg48 & u_flag)
+			pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
+		if (reg4a & a_speed)
+			pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
+
+		if (speed >= XFER_MW_DMA_0)
+			drive->pio_mode =
+				mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
+		else
+			drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
+
+		slc90e66_set_pio_mode(hwif, drive);
+	}
+}
+
+static u8 slc90e66_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02;
+
+	pci_read_config_byte(dev, 0x47, &reg47);
+
+	/* bit[0(1)]: 0:80, 1:40 */
+	return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static const struct ide_port_ops slc90e66_port_ops = {
+	.set_pio_mode		= slc90e66_set_pio_mode,
+	.set_dma_mode		= slc90e66_set_dma_mode,
+	.cable_detect		= slc90e66_cable_detect,
+};
+
+static const struct ide_port_info slc90e66_chipset = {
+	.name		= DRV_NAME,
+	.enablebits	= { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} },
+	.port_ops	= &slc90e66_port_ops,
+	.pio_mask	= ATA_PIO4,
+	.swdma_mask	= ATA_SWDMA2_ONLY,
+	.mwdma_mask	= ATA_MWDMA12_ONLY,
+	.udma_mask	= ATA_UDMA4,
+};
+
+static int slc90e66_init_one(struct pci_dev *dev,
+			     const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &slc90e66_chipset, NULL);
+}
+
+static const struct pci_device_id slc90e66_pci_tbl[] = {
+	{ PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
+
+static struct pci_driver slc90e66_pci_driver = {
+	.name		= "SLC90e66_IDE",
+	.id_table	= slc90e66_pci_tbl,
+	.probe		= slc90e66_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init slc90e66_ide_init(void)
+{
+	return ide_pci_register_driver(&slc90e66_pci_driver);
+}
+
+static void __exit slc90e66_ide_exit(void)
+{
+	pci_unregister_driver(&slc90e66_pci_driver);
+}
+
+module_init(slc90e66_ide_init);
+module_exit(slc90e66_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/tc86c001.c b/drivers/ide/tc86c001.c
new file mode 100644
index 000000000..17e6132b9
--- /dev/null
+++ b/drivers/ide/tc86c001.c
@@ -0,0 +1,270 @@
+/*
+ * Copyright (C) 2002 Toshiba Corporation
+ * Copyright (C) 2005-2006 MontaVista Software, Inc. <source@mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/module.h>
+
+#define DRV_NAME "tc86c001"
+
+static void tc86c001_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	unsigned long scr_port	= hwif->config_data + (drive->dn ? 0x02 : 0x00);
+	u16 mode, scr		= inw(scr_port);
+	const u8 speed		= drive->dma_mode;
+
+	switch (speed) {
+	case XFER_UDMA_4:	mode = 0x00c0; break;
+	case XFER_UDMA_3:	mode = 0x00b0; break;
+	case XFER_UDMA_2:	mode = 0x00a0; break;
+	case XFER_UDMA_1:	mode = 0x0090; break;
+	case XFER_UDMA_0:	mode = 0x0080; break;
+	case XFER_MW_DMA_2:	mode = 0x0070; break;
+	case XFER_MW_DMA_1:	mode = 0x0060; break;
+	case XFER_MW_DMA_0:	mode = 0x0050; break;
+	case XFER_PIO_4:	mode = 0x0400; break;
+	case XFER_PIO_3:	mode = 0x0300; break;
+	case XFER_PIO_2:	mode = 0x0200; break;
+	case XFER_PIO_1:	mode = 0x0100; break;
+	case XFER_PIO_0:
+	default:		mode = 0x0000; break;
+	}
+
+	scr &= (speed < XFER_MW_DMA_0) ? 0xf8ff : 0xff0f;
+	scr |= mode;
+	outw(scr, scr_port);
+}
+
+static void tc86c001_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	tc86c001_set_mode(hwif, drive);
+}
+
+/*
+ * HACKITY HACK
+ *
+ * This is a workaround for the limitation 5 of the TC86C001 IDE controller:
+ * if a DMA transfer terminates prematurely, the controller leaves the device's
+ * interrupt request (INTRQ) pending and does not generate a PCI interrupt (or
+ * set the interrupt bit in the DMA status register), thus no PCI interrupt
+ * will occur until a DMA transfer has been successfully completed.
+ *
+ * We work around this by initiating dummy, zero-length DMA transfer on
+ * a DMA timeout expiration. I found no better way to do this with the current
+ * IDE core than to temporarily replace a higher level driver's timer expiry
+ * handler with our own backing up to that handler in case our recovery fails.
+ */
+static int tc86c001_timer_expiry(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	ide_expiry_t *expiry	= ide_get_hwifdata(hwif);
+	u8 dma_stat		= inb(hwif->dma_base + ATA_DMA_STATUS);
+
+	/* Restore a higher level driver's expiry handler first. */
+	hwif->expiry = expiry;
+
+	if ((dma_stat & 5) == 1) {	/* DMA active and no interrupt */
+		unsigned long sc_base	= hwif->config_data;
+		unsigned long twcr_port	= sc_base + (drive->dn ? 0x06 : 0x04);
+		u8 dma_cmd		= inb(hwif->dma_base + ATA_DMA_CMD);
+
+		printk(KERN_WARNING "%s: DMA interrupt possibly stuck, "
+		       "attempting recovery...\n", drive->name);
+
+		/* Stop DMA */
+		outb(dma_cmd & ~0x01, hwif->dma_base + ATA_DMA_CMD);
+
+		/* Setup the dummy DMA transfer */
+		outw(0, sc_base + 0x0a);	/* Sector Count */
+		outw(0, twcr_port);	/* Transfer Word Count 1 or 2 */
+
+		/* Start the dummy DMA transfer */
+
+		/* clear R_OR_WCTR for write */
+		outb(0x00, hwif->dma_base + ATA_DMA_CMD);
+		/* set START_STOPBM */
+		outb(0x01, hwif->dma_base + ATA_DMA_CMD);
+
+		/*
+		 * If an interrupt was pending, it should come thru shortly.
+		 * If not, a higher level driver's expiry handler should
+		 * eventually cause some kind of recovery from the DMA stall.
+		 */
+		return WAIT_MIN_SLEEP;
+	}
+
+	/* Chain to the restored expiry handler if DMA wasn't active. */
+	if (likely(expiry != NULL))
+		return expiry(drive);
+
+	/* If there was no handler, "emulate" that for ide_timer_expiry()... */
+	return -1;
+}
+
+static void tc86c001_dma_start(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= drive->hwif;
+	unsigned long sc_base	= hwif->config_data;
+	unsigned long twcr_port	= sc_base + (drive->dn ? 0x06 : 0x04);
+	unsigned long nsectors	= blk_rq_sectors(hwif->rq);
+
+	/*
+	 * We have to manually load the sector count and size into
+	 * the appropriate system control registers for DMA to work
+	 * with LBA48 and ATAPI devices...
+	 */
+	outw(nsectors, sc_base + 0x0a);	/* Sector Count */
+	outw(SECTOR_SIZE / 2, twcr_port); /* Transfer Word Count 1/2 */
+
+	/* Install our timeout expiry hook, saving the current handler... */
+	ide_set_hwifdata(hwif, hwif->expiry);
+	hwif->expiry = &tc86c001_timer_expiry;
+
+	ide_dma_start(drive);
+}
+
+static u8 tc86c001_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long sc_base = pci_resource_start(dev, 5);
+	u16 scr1 = inw(sc_base + 0x00);
+
+	/*
+	 * System Control  1 Register bit 13 (PDIAGN):
+	 * 0=80-pin cable, 1=40-pin cable
+	 */
+	return (scr1 & 0x2000) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static void init_hwif_tc86c001(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned long sc_base	= pci_resource_start(dev, 5);
+	u16 scr1		= inw(sc_base + 0x00);
+
+	/* System Control 1 Register bit 15 (Soft Reset) set */
+	outw(scr1 |  0x8000, sc_base + 0x00);
+
+	/* System Control 1 Register bit 14 (FIFO Reset) set */
+	outw(scr1 |  0x4000, sc_base + 0x00);
+
+	/* System Control 1 Register: reset clear */
+	outw(scr1 & ~0xc000, sc_base + 0x00);
+
+	/* Store the system control register base for convenience... */
+	hwif->config_data = sc_base;
+
+	if (!hwif->dma_base)
+		return;
+
+	/*
+	 * Sector Count Control Register bits 0 and 1 set:
+	 * software sets Sector Count Register for master and slave device
+	 */
+	outw(0x0003, sc_base + 0x0c);
+
+	/* Sector Count Register limit */
+	hwif->rqsize	 = 0xffff;
+}
+
+static const struct ide_port_ops tc86c001_port_ops = {
+	.set_pio_mode		= tc86c001_set_pio_mode,
+	.set_dma_mode		= tc86c001_set_mode,
+	.cable_detect		= tc86c001_cable_detect,
+};
+
+static const struct ide_dma_ops tc86c001_dma_ops = {
+	.dma_host_set		= ide_dma_host_set,
+	.dma_setup		= ide_dma_setup,
+	.dma_start		= tc86c001_dma_start,
+	.dma_end		= ide_dma_end,
+	.dma_test_irq		= ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info tc86c001_chipset = {
+	.name		= DRV_NAME,
+	.init_hwif	= init_hwif_tc86c001,
+	.port_ops	= &tc86c001_port_ops,
+	.dma_ops	= &tc86c001_dma_ops,
+	.host_flags	= IDE_HFLAG_SINGLE | IDE_HFLAG_OFF_BOARD,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA4,
+};
+
+static int tc86c001_init_one(struct pci_dev *dev,
+			     const struct pci_device_id *id)
+{
+	int rc;
+
+	rc = pci_enable_device(dev);
+	if (rc)
+		goto out;
+
+	rc = pci_request_region(dev, 5, DRV_NAME);
+	if (rc) {
+		printk(KERN_ERR DRV_NAME ": system control regs already in use");
+		goto out_disable;
+	}
+
+	rc = ide_pci_init_one(dev, &tc86c001_chipset, NULL);
+	if (rc)
+		goto out_release;
+
+	goto out;
+
+out_release:
+	pci_release_region(dev, 5);
+out_disable:
+	pci_disable_device(dev);
+out:
+	return rc;
+}
+
+static void tc86c001_remove(struct pci_dev *dev)
+{
+	ide_pci_remove(dev);
+	pci_release_region(dev, 5);
+	pci_disable_device(dev);
+}
+
+static const struct pci_device_id tc86c001_pci_tbl[] = {
+	{ PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_IDE), 0 },
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, tc86c001_pci_tbl);
+
+static struct pci_driver tc86c001_pci_driver = {
+	.name		= "TC86C001",
+	.id_table	= tc86c001_pci_tbl,
+	.probe		= tc86c001_init_one,
+	.remove		= tc86c001_remove,
+};
+
+static int __init tc86c001_ide_init(void)
+{
+	return ide_pci_register_driver(&tc86c001_pci_driver);
+}
+
+static void __exit tc86c001_ide_exit(void)
+{
+	pci_unregister_driver(&tc86c001_pci_driver);
+}
+
+module_init(tc86c001_ide_init);
+module_exit(tc86c001_ide_exit);
+
+MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
+MODULE_DESCRIPTION("PCI driver module for TC86C001 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/triflex.c b/drivers/ide/triflex.c
new file mode 100644
index 000000000..16ddd0956
--- /dev/null
+++ b/drivers/ide/triflex.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * IDE Chipset driver for the Compaq TriFlex IDE controller.
+ * 
+ * Known to work with the Compaq Workstation 5x00 series.
+ *
+ * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
+ * Author: Torben Mathiasen <torben.mathiasen@hp.com>
+ * 
+ * Loosely based on the piix & svwks drivers.
+ *
+ * Documentation:
+ *	Not publicly available.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#define DRV_NAME "triflex"
+
+static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u32 triflex_timings = 0;
+	u16 timing = 0;
+	u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
+
+	pci_read_config_dword(dev, channel_offset, &triflex_timings);
+
+	switch (drive->dma_mode) {
+		case XFER_MW_DMA_2:
+			timing = 0x0103; 
+			break;
+		case XFER_MW_DMA_1:
+			timing = 0x0203;
+			break;
+		case XFER_MW_DMA_0:
+			timing = 0x0808;
+			break;
+		case XFER_SW_DMA_2:
+		case XFER_SW_DMA_1:
+		case XFER_SW_DMA_0:
+			timing = 0x0f0f;
+			break;
+		case XFER_PIO_4:
+			timing = 0x0202;
+			break;
+		case XFER_PIO_3:
+			timing = 0x0204;
+			break;
+		case XFER_PIO_2:
+			timing = 0x0404;
+			break;
+		case XFER_PIO_1:
+			timing = 0x0508;
+			break;
+		case XFER_PIO_0:
+			timing = 0x0808;
+			break;
+	}
+
+	triflex_timings &= ~(0xFFFF << (16 * unit));
+	triflex_timings |= (timing << (16 * unit));
+	
+	pci_write_config_dword(dev, channel_offset, triflex_timings);
+}
+
+static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	triflex_set_mode(hwif, drive);
+}
+
+static const struct ide_port_ops triflex_port_ops = {
+	.set_pio_mode		= triflex_set_pio_mode,
+	.set_dma_mode		= triflex_set_mode,
+};
+
+static const struct ide_port_info triflex_device = {
+	.name		= DRV_NAME,
+	.enablebits	= {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
+	.port_ops	= &triflex_port_ops,
+	.pio_mask	= ATA_PIO4,
+	.swdma_mask	= ATA_SWDMA2,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &triflex_device, NULL);
+}
+
+static const struct pci_device_id triflex_pci_tbl[] = {
+	{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
+
+#ifdef CONFIG_PM
+static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
+{
+	/*
+	 * We must not disable or powerdown the device.
+	 * APM bios refuses to suspend if IDE is not accessible.
+	 */
+	pci_save_state(dev);
+	return 0;
+}
+#else
+#define triflex_ide_pci_suspend NULL
+#endif
+
+static struct pci_driver triflex_pci_driver = {
+	.name		= "TRIFLEX_IDE",
+	.id_table	= triflex_pci_tbl,
+	.probe		= triflex_init_one,
+	.remove		= ide_pci_remove,
+	.suspend	= triflex_ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init triflex_ide_init(void)
+{
+	return ide_pci_register_driver(&triflex_pci_driver);
+}
+
+static void __exit triflex_ide_exit(void)
+{
+	pci_unregister_driver(&triflex_pci_driver);
+}
+
+module_init(triflex_ide_init);
+module_exit(triflex_ide_exit);
+
+MODULE_AUTHOR("Torben Mathiasen");
+MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
+MODULE_LICENSE("GPL");
+
+
diff --git a/drivers/ide/trm290.c b/drivers/ide/trm290.c
new file mode 100644
index 000000000..d550b379b
--- /dev/null
+++ b/drivers/ide/trm290.c
@@ -0,0 +1,374 @@
+/*
+ *  Copyright (c) 1997-1998  Mark Lord
+ *  Copyright (c) 2007       MontaVista Software, Inc. <source@mvista.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  June 22, 2004 - get rid of check_region
+ *                   - Jesper Juhl
+ *
+ */
+
+/*
+ * This module provides support for the bus-master IDE DMA function
+ * of the Tekram TRM290 chip, used on a variety of PCI IDE add-on boards,
+ * including a "Precision Instruments" board.  The TRM290 pre-dates
+ * the sff-8038 standard (ide-dma.c) by a few months, and differs
+ * significantly enough to warrant separate routines for some functions,
+ * while re-using others from ide-dma.c.
+ *
+ * EXPERIMENTAL!  It works for me (a sample of one).
+ *
+ * Works reliably for me in DMA mode (READs only),
+ * DMA WRITEs are disabled by default (see #define below);
+ *
+ * DMA is not enabled automatically for this chipset,
+ * but can be turned on manually (with "hdparm -d1") at run time.
+ *
+ * I need volunteers with "spare" drives for further testing
+ * and development, and maybe to help figure out the peculiarities.
+ * Even knowing the registers (below), some things behave strangely.
+ */
+
+#define TRM290_NO_DMA_WRITES	/* DMA writes seem unreliable sometimes */
+
+/*
+ * TRM-290 PCI-IDE2 Bus Master Chip
+ * ================================
+ * The configuration registers are addressed in normal I/O port space
+ * and are used as follows:
+ *
+ * trm290_base depends on jumper settings, and is probed for by ide-dma.c
+ *
+ * trm290_base+2 when WRITTEN: chiptest register (byte, write-only)
+ *	bit7 must always be written as "1"
+ *	bits6-2 undefined
+ *	bit1 1=legacy_compatible_mode, 0=native_pci_mode
+ *	bit0 1=test_mode, 0=normal(default)
+ *
+ * trm290_base+2 when READ: status register (byte, read-only)
+ *	bits7-2 undefined
+ *	bit1 channel0 busmaster interrupt status 0=none, 1=asserted
+ *	bit0 channel0 interrupt status 0=none, 1=asserted
+ *
+ * trm290_base+3 Interrupt mask register
+ *	bits7-5 undefined
+ *	bit4 legacy_header: 1=present, 0=absent
+ *	bit3 channel1 busmaster interrupt status 0=none, 1=asserted (read only)
+ *	bit2 channel1 interrupt status 0=none, 1=asserted (read only)
+ *	bit1 channel1 interrupt mask: 1=masked, 0=unmasked(default)
+ *	bit0 channel0 interrupt mask: 1=masked, 0=unmasked(default)
+ *
+ * trm290_base+1 "CPR" Config Pointer Register (byte)
+ *	bit7 1=autoincrement CPR bits 2-0 after each access of CDR
+ *	bit6 1=min. 1 wait-state posted write cycle (default), 0=0 wait-state
+ *	bit5 0=enabled master burst access (default), 1=disable  (write only)
+ *	bit4 PCI DEVSEL# timing select: 1=medium(default), 0=fast
+ *	bit3 0=primary IDE channel, 1=secondary IDE channel
+ *	bits2-0 register index for accesses through CDR port
+ *
+ * trm290_base+0 "CDR" Config Data Register (word)
+ *	two sets of seven config registers,
+ *	selected by CPR bit 3 (channel) and CPR bits 2-0 (index 0 to 6),
+ *	each index defined below:
+ *
+ * Index-0 Base address register for command block (word)
+ *	defaults: 0x1f0 for primary, 0x170 for secondary
+ *
+ * Index-1 general config register (byte)
+ *	bit7 1=DMA enable, 0=DMA disable
+ *	bit6 1=activate IDE_RESET, 0=no action (default)
+ *	bit5 1=enable IORDY, 0=disable IORDY (default)
+ *	bit4 0=16-bit data port(default), 1=8-bit (XT) data port
+ *	bit3 interrupt polarity: 1=active_low, 0=active_high(default)
+ *	bit2 power-saving-mode(?): 1=enable, 0=disable(default) (write only)
+ *	bit1 bus_master_mode(?): 1=enable, 0=disable(default)
+ *	bit0 enable_io_ports: 1=enable(default), 0=disable
+ *
+ * Index-2 read-ahead counter preload bits 0-7 (byte, write only)
+ *	bits7-0 bits7-0 of readahead count
+ *
+ * Index-3 read-ahead config register (byte, write only)
+ *	bit7 1=enable_readahead, 0=disable_readahead(default)
+ *	bit6 1=clear_FIFO, 0=no_action
+ *	bit5 undefined
+ *	bit4 mode4 timing control: 1=enable, 0=disable(default)
+ *	bit3 undefined
+ *	bit2 undefined
+ *	bits1-0 bits9-8 of read-ahead count
+ *
+ * Index-4 base address register for control block (word)
+ *	defaults: 0x3f6 for primary, 0x376 for secondary
+ *
+ * Index-5 data port timings (shared by both drives) (byte)
+ *	standard PCI "clk" (clock) counts, default value = 0xf5
+ *
+ *	bits7-6 setup time:  00=1clk, 01=2clk, 10=3clk, 11=4clk
+ *	bits5-3 hold time:	000=1clk, 001=2clk, 010=3clk,
+ *				011=4clk, 100=5clk, 101=6clk,
+ *				110=8clk, 111=12clk
+ *	bits2-0 active time:	000=2clk, 001=3clk, 010=4clk,
+ *				011=5clk, 100=6clk, 101=8clk,
+ *				110=12clk, 111=16clk
+ *
+ * Index-6 command/control port timings (shared by both drives) (byte)
+ *	same layout as Index-5, default value = 0xde
+ *
+ * Suggested CDR programming for PIO mode0 (600ns):
+ *	0x01f0,0x21,0xff,0x80,0x03f6,0xf5,0xde	; primary
+ *	0x0170,0x21,0xff,0x80,0x0376,0xf5,0xde	; secondary
+ *
+ * Suggested CDR programming for PIO mode3 (180ns):
+ *	0x01f0,0x21,0xff,0x80,0x03f6,0x09,0xde	; primary
+ *	0x0170,0x21,0xff,0x80,0x0376,0x09,0xde	; secondary
+ *
+ * Suggested CDR programming for PIO mode4 (120ns):
+ *	0x01f0,0x21,0xff,0x80,0x03f6,0x00,0xde	; primary
+ *	0x0170,0x21,0xff,0x80,0x0376,0x00,0xde	; secondary
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "trm290"
+
+static void trm290_prepare_drive (ide_drive_t *drive, unsigned int use_dma)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u16 reg = 0;
+	unsigned long flags;
+
+	/* select PIO or DMA */
+	reg = use_dma ? (0x21 | 0x82) : (0x21 & ~0x82);
+
+	local_irq_save(flags);
+
+	if (reg != hwif->select_data) {
+		hwif->select_data = reg;
+		/* set PIO/DMA */
+		outb(0x51 | (hwif->channel << 3), hwif->config_data + 1);
+		outw(reg & 0xff, hwif->config_data);
+	}
+
+	/* enable IRQ if not probing */
+	if (drive->dev_flags & IDE_DFLAG_PRESENT) {
+		reg = inw(hwif->config_data + 3);
+		reg &= 0x13;
+		reg &= ~(1 << hwif->channel);
+		outw(reg, hwif->config_data + 3);
+	}
+
+	local_irq_restore(flags);
+}
+
+static void trm290_dev_select(ide_drive_t *drive)
+{
+	trm290_prepare_drive(drive, !!(drive->dev_flags & IDE_DFLAG_USING_DMA));
+
+	outb(drive->select | ATA_DEVICE_OBS, drive->hwif->io_ports.device_addr);
+}
+
+static int trm290_dma_check(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	if (cmd->tf_flags & IDE_TFLAG_WRITE) {
+#ifdef TRM290_NO_DMA_WRITES
+		/* always use PIO for writes */
+		return 1;
+#endif
+	}
+	return 0;
+}
+
+static int trm290_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	unsigned int count, rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 2;
+
+	count = ide_build_dmatable(drive, cmd);
+	if (count == 0)
+		/* try PIO instead of DMA */
+		return 1;
+
+	outl(hwif->dmatable_dma | rw, hwif->dma_base);
+	/* start DMA */
+	outw(count * 2 - 1, hwif->dma_base + 2);
+
+	return 0;
+}
+
+static void trm290_dma_start(ide_drive_t *drive)
+{
+	trm290_prepare_drive(drive, 1);
+}
+
+static int trm290_dma_end(ide_drive_t *drive)
+{
+	u16 status = inw(drive->hwif->dma_base + 2);
+
+	trm290_prepare_drive(drive, 0);
+
+	return status != 0x00ff;
+}
+
+static int trm290_dma_test_irq(ide_drive_t *drive)
+{
+	u16 status = inw(drive->hwif->dma_base + 2);
+
+	return status == 0x00ff;
+}
+
+static void trm290_dma_host_set(ide_drive_t *drive, int on)
+{
+}
+
+static void init_hwif_trm290(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev	= to_pci_dev(hwif->dev);
+	unsigned int  cfg_base	= pci_resource_start(dev, 4);
+	unsigned long flags;
+	u8 reg = 0;
+
+	if ((dev->class & 5) && cfg_base)
+		printk(KERN_INFO DRV_NAME " %s: chip", pci_name(dev));
+	else {
+		cfg_base = 0x3df0;
+		printk(KERN_INFO DRV_NAME " %s: using default", pci_name(dev));
+	}
+	printk(KERN_CONT " config base at 0x%04x\n", cfg_base);
+	hwif->config_data = cfg_base;
+	hwif->dma_base = (cfg_base + 4) ^ (hwif->channel ? 0x80 : 0);
+
+	printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx\n",
+	       hwif->name, hwif->dma_base, hwif->dma_base + 3);
+
+	if (ide_allocate_dma_engine(hwif))
+		return;
+
+	local_irq_save(flags);
+	/* put config reg into first byte of hwif->select_data */
+	outb(0x51 | (hwif->channel << 3), hwif->config_data + 1);
+	/* select PIO as default */
+	hwif->select_data = 0x21;
+	outb(hwif->select_data, hwif->config_data);
+	/* get IRQ info */
+	reg = inb(hwif->config_data + 3);
+	/* mask IRQs for both ports */
+	reg = (reg & 0x10) | 0x03;
+	outb(reg, hwif->config_data + 3);
+	local_irq_restore(flags);
+
+	if (reg & 0x10)
+		/* legacy mode */
+		hwif->irq = hwif->channel ? 15 : 14;
+
+#if 1
+	{
+	/*
+	 * My trm290-based card doesn't seem to work with all possible values
+	 * for the control basereg, so this kludge ensures that we use only
+	 * values that are known to work.  Ugh.		-ml
+	 */
+		u16 new, old, compat = hwif->channel ? 0x374 : 0x3f4;
+		static u16 next_offset = 0;
+		u8 old_mask;
+
+		outb(0x54 | (hwif->channel << 3), hwif->config_data + 1);
+		old = inw(hwif->config_data);
+		old &= ~1;
+		old_mask = inb(old + 2);
+		if (old != compat && old_mask == 0xff) {
+			/* leave lower 10 bits untouched */
+			compat += (next_offset += 0x400);
+			hwif->io_ports.ctl_addr = compat + 2;
+			outw(compat | 1, hwif->config_data);
+			new = inw(hwif->config_data);
+			printk(KERN_INFO "%s: control basereg workaround: "
+				"old=0x%04x, new=0x%04x\n",
+				hwif->name, old, new & ~1);
+		}
+	}
+#endif
+}
+
+static const struct ide_tp_ops trm290_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= trm290_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+static const struct ide_dma_ops trm290_dma_ops = {
+	.dma_host_set		= trm290_dma_host_set,
+	.dma_setup 		= trm290_dma_setup,
+	.dma_start 		= trm290_dma_start,
+	.dma_end		= trm290_dma_end,
+	.dma_test_irq		= trm290_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_check		= trm290_dma_check,
+};
+
+static const struct ide_port_info trm290_chipset = {
+	.name		= DRV_NAME,
+	.init_hwif	= init_hwif_trm290,
+	.tp_ops 	= &trm290_tp_ops,
+	.dma_ops	= &trm290_dma_ops,
+	.host_flags	= IDE_HFLAG_TRM290 |
+			  IDE_HFLAG_NO_ATAPI_DMA |
+#if 0 /* play it safe for now */
+			  IDE_HFLAG_TRUST_BIOS_FOR_DMA |
+#endif
+			  IDE_HFLAG_NO_AUTODMA |
+			  IDE_HFLAG_NO_LBA48,
+};
+
+static int trm290_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	return ide_pci_init_one(dev, &trm290_chipset, NULL);
+}
+
+static const struct pci_device_id trm290_pci_tbl[] = {
+	{ PCI_VDEVICE(TEKRAM, PCI_DEVICE_ID_TEKRAM_DC290), 0 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, trm290_pci_tbl);
+
+static struct pci_driver trm290_pci_driver = {
+	.name		= "TRM290_IDE",
+	.id_table	= trm290_pci_tbl,
+	.probe		= trm290_init_one,
+	.remove		= ide_pci_remove,
+};
+
+static int __init trm290_ide_init(void)
+{
+	return ide_pci_register_driver(&trm290_pci_driver);
+}
+
+static void __exit trm290_ide_exit(void)
+{
+	pci_unregister_driver(&trm290_pci_driver);
+}
+
+module_init(trm290_ide_init);
+module_exit(trm290_ide_exit);
+
+MODULE_AUTHOR("Mark Lord");
+MODULE_DESCRIPTION("PCI driver module for Tekram TRM290 IDE");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
new file mode 100644
index 000000000..962eb9250
--- /dev/null
+++ b/drivers/ide/tx4938ide.c
@@ -0,0 +1,209 @@
+/*
+ * TX4938 internal IDE driver
+ * Based on tx4939ide.c.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * (C) Copyright TOSHIBA CORPORATION 2005-2007
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/ide.h>
+#include <asm/txx9/tx4938.h>
+
+static void tx4938ide_tune_ebusc(unsigned int ebus_ch,
+				 unsigned int gbus_clock,
+				 u8 pio)
+{
+	struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
+	u64 cr = __raw_readq(&tx4938_ebuscptr->cr[ebus_ch]);
+	unsigned int sp = (cr >> 4) & 3;
+	unsigned int clock = gbus_clock / (4 - sp);
+	unsigned int cycle = 1000000000 / clock;
+	unsigned int shwt;
+	int wt;
+
+	/* Minimum DIOx- active time */
+	wt = DIV_ROUND_UP(t->act8b, cycle) - 2;
+	/* IORDY setup time: 35ns */
+	wt = max_t(int, wt, DIV_ROUND_UP(35, cycle));
+	/* actual wait-cycle is max(wt & ~1, 1) */
+	if (wt > 2 && (wt & 1))
+		wt++;
+	wt &= ~1;
+	/* Address-valid to DIOR/DIOW setup */
+	shwt = DIV_ROUND_UP(t->setup, cycle);
+
+	/* -DIOx recovery time (SHWT * 4) and cycle time requirement */
+	while ((shwt * 4 + wt + (wt ? 2 : 3)) * cycle < t->cycle)
+		shwt++;
+	if (shwt > 7) {
+		pr_warn("tx4938ide: SHWT violation (%d)\n", shwt);
+		shwt = 7;
+	}
+	pr_debug("tx4938ide: ebus %d, bus cycle %dns, WT %d, SHWT %d\n",
+		 ebus_ch, cycle, wt, shwt);
+
+	__raw_writeq((cr & ~0x3f007ull) | (wt << 12) | shwt,
+		     &tx4938_ebuscptr->cr[ebus_ch]);
+}
+
+static void tx4938ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	struct tx4938ide_platform_info *pdata = dev_get_platdata(hwif->dev);
+	u8 safe = drive->pio_mode - XFER_PIO_0;
+	ide_drive_t *pair;
+
+	pair = ide_get_pair_dev(drive);
+	if (pair)
+		safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0);
+	tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, safe);
+}
+
+#ifdef __BIG_ENDIAN
+
+/* custom iops (independent from SWAP_IO_SPACE) */
+static void tx4938ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
+				void *buf, unsigned int len)
+{
+	unsigned long port = drive->hwif->io_ports.data_addr;
+	unsigned short *ptr = buf;
+	unsigned int count = (len + 1) / 2;
+
+	while (count--)
+		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
+	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
+}
+
+static void tx4938ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
+				void *buf, unsigned int len)
+{
+	unsigned long port = drive->hwif->io_ports.data_addr;
+	unsigned short *ptr = buf;
+	unsigned int count = (len + 1) / 2;
+
+	while (count--) {
+		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
+		ptr++;
+	}
+	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
+}
+
+static const struct ide_tp_ops tx4938ide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= tx4938ide_input_data_swap,
+	.output_data		= tx4938ide_output_data_swap,
+};
+
+#endif	/* __BIG_ENDIAN */
+
+static const struct ide_port_ops tx4938ide_port_ops = {
+	.set_pio_mode		= tx4938ide_set_pio_mode,
+};
+
+static const struct ide_port_info tx4938ide_port_info __initconst = {
+	.port_ops		= &tx4938ide_port_ops,
+#ifdef __BIG_ENDIAN
+	.tp_ops			= &tx4938ide_tp_ops,
+#endif
+	.host_flags		= IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
+	.pio_mask		= ATA_PIO5,
+	.chipset		= ide_generic,
+};
+
+static int __init tx4938ide_probe(struct platform_device *pdev)
+{
+	struct ide_hw hw, *hws[] = { &hw };
+	struct ide_host *host;
+	struct resource *res;
+	struct tx4938ide_platform_info *pdata = dev_get_platdata(&pdev->dev);
+	int irq, ret, i;
+	unsigned long mapbase, mapctl;
+	struct ide_port_info d = tx4938ide_port_info;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return -ENODEV;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), "tx4938ide"))
+		return -EBUSY;
+	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
+					      8 << pdata->ioport_shift);
+	mapctl = (unsigned long)devm_ioremap(&pdev->dev,
+					     res->start + 0x10000 +
+					     (6 << pdata->ioport_shift),
+					     1 << pdata->ioport_shift);
+	if (!mapbase || !mapctl)
+		return -EBUSY;
+
+	memset(&hw, 0, sizeof(hw));
+	if (pdata->ioport_shift) {
+		unsigned long port = mapbase;
+		unsigned long ctl = mapctl;
+
+		hw.io_ports_array[0] = port;
+#ifdef __BIG_ENDIAN
+		port++;
+		ctl++;
+#endif
+		for (i = 1; i <= 7; i++)
+			hw.io_ports_array[i] =
+				port + (i << pdata->ioport_shift);
+		hw.io_ports.ctl_addr = ctl;
+	} else
+		ide_std_init_ports(&hw, mapbase, mapctl);
+	hw.irq = irq;
+	hw.dev = &pdev->dev;
+
+	pr_info("TX4938 IDE interface (base %#lx, ctl %#lx, irq %d)\n",
+		mapbase, mapctl, hw.irq);
+	if (pdata->gbus_clock)
+		tx4938ide_tune_ebusc(pdata->ebus_ch, pdata->gbus_clock, 0);
+	else
+		d.port_ops = NULL;
+	ret = ide_host_add(&d, hws, 1, &host);
+	if (!ret)
+		platform_set_drvdata(pdev, host);
+	return ret;
+}
+
+static int __exit tx4938ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+
+	ide_host_remove(host);
+	return 0;
+}
+
+static struct platform_driver tx4938ide_driver = {
+	.driver		= {
+		.name	= "tx4938ide",
+	},
+	.remove = __exit_p(tx4938ide_remove),
+};
+
+module_platform_driver_probe(tx4938ide_driver, tx4938ide_probe);
+
+MODULE_DESCRIPTION("TX4938 internal IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:tx4938ide");
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
new file mode 100644
index 000000000..b1bbf807b
--- /dev/null
+++ b/drivers/ide/tx4939ide.c
@@ -0,0 +1,628 @@
+/*
+ * TX4939 internal IDE driver
+ * Based on RBTX49xx patch from CELF patch archive.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * (C) Copyright TOSHIBA CORPORATION 2005-2007
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/scatterlist.h>
+
+#include <asm/ide.h>
+
+#define MODNAME	"tx4939ide"
+
+/* ATA Shadow Registers (8-bit except for Data which is 16-bit) */
+#define TX4939IDE_Data			0x000
+#define TX4939IDE_Error_Feature		0x001
+#define TX4939IDE_Sec			0x002
+#define TX4939IDE_LBA0			0x003
+#define TX4939IDE_LBA1			0x004
+#define TX4939IDE_LBA2			0x005
+#define TX4939IDE_DevHead		0x006
+#define TX4939IDE_Stat_Cmd		0x007
+#define TX4939IDE_AltStat_DevCtl	0x402
+/* H/W DMA Registers  */
+#define TX4939IDE_DMA_Cmd	0x800	/* 8-bit */
+#define TX4939IDE_DMA_Stat	0x802	/* 8-bit */
+#define TX4939IDE_PRD_Ptr	0x804	/* 32-bit */
+/* ATA100 CORE Registers (16-bit) */
+#define TX4939IDE_Sys_Ctl	0xc00
+#define TX4939IDE_Xfer_Cnt_1	0xc08
+#define TX4939IDE_Xfer_Cnt_2	0xc0a
+#define TX4939IDE_Sec_Cnt	0xc10
+#define TX4939IDE_Start_Lo_Addr	0xc18
+#define TX4939IDE_Start_Up_Addr	0xc20
+#define TX4939IDE_Add_Ctl	0xc28
+#define TX4939IDE_Lo_Burst_Cnt	0xc30
+#define TX4939IDE_Up_Burst_Cnt	0xc38
+#define TX4939IDE_PIO_Addr	0xc88
+#define TX4939IDE_H_Rst_Tim	0xc90
+#define TX4939IDE_Int_Ctl	0xc98
+#define TX4939IDE_Pkt_Cmd	0xcb8
+#define TX4939IDE_Bxfer_Cnt_Hi	0xcc0
+#define TX4939IDE_Bxfer_Cnt_Lo	0xcc8
+#define TX4939IDE_Dev_TErr	0xcd0
+#define TX4939IDE_Pkt_Xfer_Ctl	0xcd8
+#define TX4939IDE_Start_TAddr	0xce0
+
+/* bits for Int_Ctl */
+#define TX4939IDE_INT_ADDRERR	0x80
+#define TX4939IDE_INT_REACHMUL	0x40
+#define TX4939IDE_INT_DEVTIMING	0x20
+#define TX4939IDE_INT_UDMATERM	0x10
+#define TX4939IDE_INT_TIMER	0x08
+#define TX4939IDE_INT_BUSERR	0x04
+#define TX4939IDE_INT_XFEREND	0x02
+#define TX4939IDE_INT_HOST	0x01
+
+#define TX4939IDE_IGNORE_INTS	\
+	(TX4939IDE_INT_ADDRERR | TX4939IDE_INT_REACHMUL | \
+	 TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_UDMATERM | \
+	 TX4939IDE_INT_TIMER | TX4939IDE_INT_XFEREND)
+
+#ifdef __BIG_ENDIAN
+#define tx4939ide_swizzlel(a)	((a) ^ 4)
+#define tx4939ide_swizzlew(a)	((a) ^ 6)
+#define tx4939ide_swizzleb(a)	((a) ^ 7)
+#else
+#define tx4939ide_swizzlel(a)	(a)
+#define tx4939ide_swizzlew(a)	(a)
+#define tx4939ide_swizzleb(a)	(a)
+#endif
+
+static u16 tx4939ide_readw(void __iomem *base, u32 reg)
+{
+	return __raw_readw(base + tx4939ide_swizzlew(reg));
+}
+static u8 tx4939ide_readb(void __iomem *base, u32 reg)
+{
+	return __raw_readb(base + tx4939ide_swizzleb(reg));
+}
+static void tx4939ide_writel(u32 val, void __iomem *base, u32 reg)
+{
+	__raw_writel(val, base + tx4939ide_swizzlel(reg));
+}
+static void tx4939ide_writew(u16 val, void __iomem *base, u32 reg)
+{
+	__raw_writew(val, base + tx4939ide_swizzlew(reg));
+}
+static void tx4939ide_writeb(u8 val, void __iomem *base, u32 reg)
+{
+	__raw_writeb(val, base + tx4939ide_swizzleb(reg));
+}
+
+#define TX4939IDE_BASE(hwif)	((void __iomem *)(hwif)->extra_base)
+
+static void tx4939ide_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	int is_slave = drive->dn;
+	u32 mask, val;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+	u8 safe = pio;
+	ide_drive_t *pair;
+
+	pair = ide_get_pair_dev(drive);
+	if (pair)
+		safe = min_t(u8, safe, pair->pio_mode - XFER_PIO_0);
+	/*
+	 * Update Command Transfer Mode for master/slave and Data
+	 * Transfer Mode for this drive.
+	 */
+	mask = is_slave ? 0x07f00000 : 0x000007f0;
+	val = ((safe << 8) | (pio << 4)) << (is_slave ? 16 : 0);
+	hwif->select_data = (hwif->select_data & ~mask) | val;
+	/* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
+}
+
+static void tx4939ide_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	u32 mask, val;
+	const u8 mode = drive->dma_mode;
+
+	/* Update Data Transfer Mode for this drive. */
+	if (mode >= XFER_UDMA_0)
+		val = mode - XFER_UDMA_0 + 8;
+	else
+		val = mode - XFER_MW_DMA_0 + 5;
+	if (drive->dn) {
+		mask = 0x00f00000;
+		val <<= 20;
+	} else {
+		mask = 0x000000f0;
+		val <<= 4;
+	}
+	hwif->select_data = (hwif->select_data & ~mask) | val;
+	/* tx4939ide_tf_load_fixup() will set the Sys_Ctl register */
+}
+
+static u16 tx4939ide_check_error_ints(ide_hwif_t *hwif)
+{
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
+
+	if (ctl & TX4939IDE_INT_BUSERR) {
+		/* reset FIFO */
+		u16 sysctl = tx4939ide_readw(base, TX4939IDE_Sys_Ctl);
+
+		tx4939ide_writew(sysctl | 0x4000, base, TX4939IDE_Sys_Ctl);
+		/* wait 12GBUSCLK (typ. 60ns @ GBUS200MHz, max 270ns) */
+		ndelay(270);
+		tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
+	}
+	if (ctl & (TX4939IDE_INT_ADDRERR |
+		   TX4939IDE_INT_DEVTIMING | TX4939IDE_INT_BUSERR))
+		pr_err("%s: Error interrupt %#x (%s%s%s )\n",
+		       hwif->name, ctl,
+		       ctl & TX4939IDE_INT_ADDRERR ? " Address-Error" : "",
+		       ctl & TX4939IDE_INT_DEVTIMING ? " DEV-Timing" : "",
+		       ctl & TX4939IDE_INT_BUSERR ? " Bus-Error" : "");
+	return ctl;
+}
+
+static void tx4939ide_clear_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif;
+	void __iomem *base;
+	u16 ctl;
+
+	/*
+	 * tx4939ide_dma_test_irq() and tx4939ide_dma_end() do all job
+	 * for DMA case.
+	 */
+	if (drive->waiting_for_dma)
+		return;
+	hwif = drive->hwif;
+	base = TX4939IDE_BASE(hwif);
+	ctl = tx4939ide_check_error_ints(hwif);
+	tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
+}
+
+static u8 tx4939ide_cable_detect(ide_hwif_t *hwif)
+{
+	void __iomem *base = TX4939IDE_BASE(hwif);
+
+	return tx4939ide_readw(base, TX4939IDE_Sys_Ctl) & 0x2000 ?
+		ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+#ifdef __BIG_ENDIAN
+static void tx4939ide_dma_host_set(ide_drive_t *drive, int on)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 unit = drive->dn;
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u8 dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+
+	if (on)
+		dma_stat |= (1 << (5 + unit));
+	else
+		dma_stat &= ~(1 << (5 + unit));
+
+	tx4939ide_writeb(dma_stat, base, TX4939IDE_DMA_Stat);
+}
+#else
+#define tx4939ide_dma_host_set	ide_dma_host_set
+#endif
+
+static u8 tx4939ide_clear_dma_status(void __iomem *base)
+{
+	u8 dma_stat;
+
+	/* read DMA status for INTR & ERROR flags */
+	dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+	/* clear INTR & ERROR flags */
+	tx4939ide_writeb(dma_stat | ATA_DMA_INTR | ATA_DMA_ERR, base,
+			 TX4939IDE_DMA_Stat);
+	/* recover intmask cleared by writing to bit2 of DMA_Stat */
+	tx4939ide_writew(TX4939IDE_IGNORE_INTS << 8, base, TX4939IDE_Int_Ctl);
+	return dma_stat;
+}
+
+#ifdef __BIG_ENDIAN
+/* custom ide_build_dmatable to handle swapped layout */
+static int tx4939ide_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u32 *table = (u32 *)hwif->dmatable_cpu;
+	unsigned int count = 0;
+	int i;
+	struct scatterlist *sg;
+
+	for_each_sg(hwif->sg_table, sg, cmd->sg_nents, i) {
+		u32 cur_addr, cur_len, bcount;
+
+		cur_addr = sg_dma_address(sg);
+		cur_len = sg_dma_len(sg);
+
+		/*
+		 * Fill in the DMA table, without crossing any 64kB boundaries.
+		 */
+
+		while (cur_len) {
+			if (count++ >= PRD_ENTRIES)
+				goto use_pio_instead;
+
+			bcount = 0x10000 - (cur_addr & 0xffff);
+			if (bcount > cur_len)
+				bcount = cur_len;
+			/*
+			 * This workaround for zero count seems required.
+			 * (standard ide_build_dmatable does it too)
+			 */
+			if (bcount == 0x10000)
+				bcount = 0x8000;
+			*table++ = bcount & 0xffff;
+			*table++ = cur_addr;
+			cur_addr += bcount;
+			cur_len -= bcount;
+		}
+	}
+
+	if (count) {
+		*(table - 2) |= 0x80000000;
+		return count;
+	}
+
+use_pio_instead:
+	printk(KERN_ERR "%s: %s\n", drive->name,
+		count ? "DMA table too small" : "empty DMA table?");
+
+	return 0; /* revert to PIO for this request */
+}
+#else
+#define tx4939ide_build_dmatable	ide_build_dmatable
+#endif
+
+static int tx4939ide_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u8 rw = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 0 : ATA_DMA_WR;
+
+	/* fall back to PIO! */
+	if (tx4939ide_build_dmatable(drive, cmd) == 0)
+		return 1;
+
+	/* PRD table */
+	tx4939ide_writel(hwif->dmatable_dma, base, TX4939IDE_PRD_Ptr);
+
+	/* specify r/w */
+	tx4939ide_writeb(rw, base, TX4939IDE_DMA_Cmd);
+
+	/* clear INTR & ERROR flags */
+	tx4939ide_clear_dma_status(base);
+
+	tx4939ide_writew(SECTOR_SIZE / 2, base, drive->dn ?
+			 TX4939IDE_Xfer_Cnt_2 : TX4939IDE_Xfer_Cnt_1);
+
+	tx4939ide_writew(blk_rq_sectors(cmd->rq), base, TX4939IDE_Sec_Cnt);
+
+	return 0;
+}
+
+static int tx4939ide_dma_end(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	u8 dma_stat, dma_cmd;
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u16 ctl = tx4939ide_readw(base, TX4939IDE_Int_Ctl);
+
+	/* get DMA command mode */
+	dma_cmd = tx4939ide_readb(base, TX4939IDE_DMA_Cmd);
+	/* stop DMA */
+	tx4939ide_writeb(dma_cmd & ~ATA_DMA_START, base, TX4939IDE_DMA_Cmd);
+
+	/* read and clear the INTR & ERROR bits */
+	dma_stat = tx4939ide_clear_dma_status(base);
+
+#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
+
+	/* verify good DMA status */
+	if ((dma_stat & CHECK_DMA_MASK) == 0 &&
+	    (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
+	    (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
+		/* INT_IDE lost... bug? */
+		return 0;
+	return ((dma_stat & CHECK_DMA_MASK) !=
+		ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
+}
+
+/* returns 1 if DMA IRQ issued, 0 otherwise */
+static int tx4939ide_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u16 ctl, ide_int;
+	u8 dma_stat, stat;
+	int found = 0;
+
+	ctl = tx4939ide_check_error_ints(hwif);
+	ide_int = ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST);
+	switch (ide_int) {
+	case TX4939IDE_INT_HOST:
+		/* On error, XFEREND might not be asserted. */
+		stat = tx4939ide_readb(base, TX4939IDE_AltStat_DevCtl);
+		if ((stat & (ATA_BUSY | ATA_DRQ | ATA_ERR)) == ATA_ERR)
+			found = 1;
+		else
+			/* Wait for XFEREND (Mask HOST and unmask XFEREND) */
+			ctl &= ~TX4939IDE_INT_XFEREND << 8;
+		ctl |= ide_int << 8;
+		break;
+	case TX4939IDE_INT_HOST | TX4939IDE_INT_XFEREND:
+		dma_stat = tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+		if (!(dma_stat & ATA_DMA_INTR))
+			pr_warn("%s: weird interrupt status. "
+				"DMA_Stat %#02x int_ctl %#04x\n",
+				hwif->name, dma_stat, ctl);
+		found = 1;
+		break;
+	}
+	/*
+	 * Do not clear XFEREND, HOST now.  They will be cleared by
+	 * clearing bit2 of DMA_Stat.
+	 */
+	ctl &= ~ide_int;
+	tx4939ide_writew(ctl, base, TX4939IDE_Int_Ctl);
+	return found;
+}
+
+#ifdef __BIG_ENDIAN
+static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif)
+{
+	void __iomem *base = TX4939IDE_BASE(hwif);
+
+	return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+}
+#else
+#define tx4939ide_dma_sff_read_status ide_dma_sff_read_status
+#endif
+
+static void tx4939ide_init_hwif(ide_hwif_t *hwif)
+{
+	void __iomem *base = TX4939IDE_BASE(hwif);
+
+	/* Soft Reset */
+	tx4939ide_writew(0x8000, base, TX4939IDE_Sys_Ctl);
+	/* at least 20 GBUSCLK (typ. 100ns @ GBUS200MHz, max 450ns) */
+	ndelay(450);
+	tx4939ide_writew(0x0000, base, TX4939IDE_Sys_Ctl);
+	/* mask some interrupts and clear all interrupts */
+	tx4939ide_writew((TX4939IDE_IGNORE_INTS << 8) | 0xff, base,
+			 TX4939IDE_Int_Ctl);
+
+	tx4939ide_writew(0x0008, base, TX4939IDE_Lo_Burst_Cnt);
+	tx4939ide_writew(0, base, TX4939IDE_Up_Burst_Cnt);
+}
+
+static int tx4939ide_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
+{
+	hwif->dma_base =
+		hwif->extra_base + tx4939ide_swizzleb(TX4939IDE_DMA_Cmd);
+	/*
+	 * Note that we cannot use ATA_DMA_TABLE_OFS, ATA_DMA_STATUS
+	 * for big endian.
+	 */
+	return ide_allocate_dma_engine(hwif);
+}
+
+static void tx4939ide_tf_load_fixup(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif = drive->hwif;
+	void __iomem *base = TX4939IDE_BASE(hwif);
+	u16 sysctl = hwif->select_data >> (drive->dn ? 16 : 0);
+
+	/*
+	 * Fix ATA100 CORE System Control Register. (The write to the
+	 * Device/Head register may write wrong data to the System
+	 * Control Register)
+	 * While Sys_Ctl is written here, dev_select() is not needed.
+	 */
+	tx4939ide_writew(sysctl, base, TX4939IDE_Sys_Ctl);
+}
+
+static void tx4939ide_tf_load(ide_drive_t *drive, struct ide_taskfile *tf,
+			      u8 valid)
+{
+	ide_tf_load(drive, tf, valid);
+
+	if (valid & IDE_VALID_DEVICE)
+		tx4939ide_tf_load_fixup(drive);
+}
+
+#ifdef __BIG_ENDIAN
+
+/* custom iops (independent from SWAP_IO_SPACE) */
+static void tx4939ide_input_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
+				void *buf, unsigned int len)
+{
+	unsigned long port = drive->hwif->io_ports.data_addr;
+	unsigned short *ptr = buf;
+	unsigned int count = (len + 1) / 2;
+
+	while (count--)
+		*ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
+	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
+}
+
+static void tx4939ide_output_data_swap(ide_drive_t *drive, struct ide_cmd *cmd,
+				void *buf, unsigned int len)
+{
+	unsigned long port = drive->hwif->io_ports.data_addr;
+	unsigned short *ptr = buf;
+	unsigned int count = (len + 1) / 2;
+
+	while (count--) {
+		__raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
+		ptr++;
+	}
+	__ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
+}
+
+static const struct ide_tp_ops tx4939ide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= tx4939ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= tx4939ide_input_data_swap,
+	.output_data		= tx4939ide_output_data_swap,
+};
+
+#else	/* __LITTLE_ENDIAN */
+
+static const struct ide_tp_ops tx4939ide_tp_ops = {
+	.exec_command		= ide_exec_command,
+	.read_status		= ide_read_status,
+	.read_altstatus		= ide_read_altstatus,
+	.write_devctl		= ide_write_devctl,
+
+	.dev_select		= ide_dev_select,
+	.tf_load		= tx4939ide_tf_load,
+	.tf_read		= ide_tf_read,
+
+	.input_data		= ide_input_data,
+	.output_data		= ide_output_data,
+};
+
+#endif	/* __LITTLE_ENDIAN */
+
+static const struct ide_port_ops tx4939ide_port_ops = {
+	.set_pio_mode		= tx4939ide_set_pio_mode,
+	.set_dma_mode		= tx4939ide_set_dma_mode,
+	.clear_irq		= tx4939ide_clear_irq,
+	.cable_detect		= tx4939ide_cable_detect,
+};
+
+static const struct ide_dma_ops tx4939ide_dma_ops = {
+	.dma_host_set		= tx4939ide_dma_host_set,
+	.dma_setup		= tx4939ide_dma_setup,
+	.dma_start		= ide_dma_start,
+	.dma_end		= tx4939ide_dma_end,
+	.dma_test_irq		= tx4939ide_dma_test_irq,
+	.dma_lost_irq		= ide_dma_lost_irq,
+	.dma_timer_expiry	= ide_dma_sff_timer_expiry,
+	.dma_sff_read_status	= tx4939ide_dma_sff_read_status,
+};
+
+static const struct ide_port_info tx4939ide_port_info __initconst = {
+	.init_hwif		= tx4939ide_init_hwif,
+	.init_dma		= tx4939ide_init_dma,
+	.port_ops		= &tx4939ide_port_ops,
+	.dma_ops		= &tx4939ide_dma_ops,
+	.tp_ops			= &tx4939ide_tp_ops,
+	.host_flags		= IDE_HFLAG_MMIO,
+	.pio_mask		= ATA_PIO4,
+	.mwdma_mask		= ATA_MWDMA2,
+	.udma_mask		= ATA_UDMA5,
+	.chipset		= ide_generic,
+};
+
+static int __init tx4939ide_probe(struct platform_device *pdev)
+{
+	struct ide_hw hw, *hws[] = { &hw };
+	struct ide_host *host;
+	struct resource *res;
+	int irq, ret;
+	unsigned long mapbase;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return -ENODEV;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), MODNAME))
+		return -EBUSY;
+	mapbase = (unsigned long)devm_ioremap(&pdev->dev, res->start,
+					      resource_size(res));
+	if (!mapbase)
+		return -EBUSY;
+	memset(&hw, 0, sizeof(hw));
+	hw.io_ports.data_addr =
+		mapbase + tx4939ide_swizzlew(TX4939IDE_Data);
+	hw.io_ports.error_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_Error_Feature);
+	hw.io_ports.nsect_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_Sec);
+	hw.io_ports.lbal_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA0);
+	hw.io_ports.lbam_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA1);
+	hw.io_ports.lbah_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_LBA2);
+	hw.io_ports.device_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_DevHead);
+	hw.io_ports.command_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_Stat_Cmd);
+	hw.io_ports.ctl_addr =
+		mapbase + tx4939ide_swizzleb(TX4939IDE_AltStat_DevCtl);
+	hw.irq = irq;
+	hw.dev = &pdev->dev;
+
+	pr_info("TX4939 IDE interface (base %#lx, irq %d)\n", mapbase, irq);
+	host = ide_host_alloc(&tx4939ide_port_info, hws, 1);
+	if (!host)
+		return -ENOMEM;
+	/* use extra_base for base address of the all registers */
+	host->ports[0]->extra_base = mapbase;
+	ret = ide_host_register(host, &tx4939ide_port_info, hws);
+	if (ret) {
+		ide_host_free(host);
+		return ret;
+	}
+	platform_set_drvdata(pdev, host);
+	return 0;
+}
+
+static int __exit tx4939ide_remove(struct platform_device *pdev)
+{
+	struct ide_host *host = platform_get_drvdata(pdev);
+
+	ide_host_remove(host);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int tx4939ide_resume(struct platform_device *dev)
+{
+	struct ide_host *host = platform_get_drvdata(dev);
+	ide_hwif_t *hwif = host->ports[0];
+
+	tx4939ide_init_hwif(hwif);
+	return 0;
+}
+#else
+#define tx4939ide_resume	NULL
+#endif
+
+static struct platform_driver tx4939ide_driver = {
+	.driver = {
+		.name = MODNAME,
+	},
+	.remove = __exit_p(tx4939ide_remove),
+	.resume = tx4939ide_resume,
+};
+
+module_platform_driver_probe(tx4939ide_driver, tx4939ide_probe);
+
+MODULE_DESCRIPTION("TX4939 internal IDE driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:tx4939ide");
diff --git a/drivers/ide/umc8672.c b/drivers/ide/umc8672.c
new file mode 100644
index 000000000..cf996f788
--- /dev/null
+++ b/drivers/ide/umc8672.c
@@ -0,0 +1,184 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  Copyright (C) 1995-1996  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Principal Author/Maintainer:  PODIEN@hml2.atlas.de (Wolfram Podien)
+ *
+ *  This file provides support for the advanced features
+ *  of the UMC 8672 IDE interface.
+ *
+ *  Version 0.01	Initial version, hacked out of ide.c,
+ *			and #include'd rather than compiled separately.
+ *			This will get cleaned up in a subsequent release.
+ *
+ *  Version 0.02	now configs/compiles separate from ide.c  -ml
+ *  Version 0.03	enhanced auto-tune, fix display bug
+ *  Version 0.05	replace sti() with restore_flags()  -ml
+ *			add detection of possible race condition  -ml
+ */
+
+/*
+ * VLB Controller Support from
+ * Wolfram Podien
+ * Rohoefe 3
+ * D28832 Achim
+ * Germany
+ *
+ * To enable UMC8672 support there must a lilo line like
+ * append="ide0=umc8672"...
+ * To set the speed according to the abilities of the hardware there must be a
+ * line like
+ * #define UMC_DRIVE0 11
+ * in the beginning of the driver, which sets the speed of drive 0 to 11 (there
+ * are some lines present). 0 - 11 are allowed speed values. These values are
+ * the results from the DOS speed test program supplied from UMC. 11 is the
+ * highest speed (about PIO mode 3)
+ */
+#define REALLY_SLOW_IO		/* some systems can safely undef this */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/ide.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "umc8672"
+
+/*
+ * Default speeds.  These can be changed with "auto-tune" and/or hdparm.
+ */
+#define UMC_DRIVE0      1              /* DOS measured drive speeds */
+#define UMC_DRIVE1      1              /* 0 to 11 allowed */
+#define UMC_DRIVE2      1              /* 11 = Fastest Speed */
+#define UMC_DRIVE3      1              /* In case of crash reduce speed */
+
+static u8 current_speeds[4] = {UMC_DRIVE0, UMC_DRIVE1, UMC_DRIVE2, UMC_DRIVE3};
+static const u8 pio_to_umc [5] = {0, 3, 7, 10, 11};	/* rough guesses */
+
+/*       0    1    2    3    4    5    6    7    8    9    10   11      */
+static const u8 speedtab [3][12] = {
+	{0x0f, 0x0b, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
+	{0x03, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1},
+	{0xff, 0xcb, 0xc0, 0x58, 0x36, 0x33, 0x23, 0x22, 0x21, 0x11, 0x10, 0x0}
+};
+
+static void out_umc(char port, char wert)
+{
+	outb_p(port, 0x108);
+	outb_p(wert, 0x109);
+}
+
+static inline u8 in_umc(char port)
+{
+	outb_p(port, 0x108);
+	return inb_p(0x109);
+}
+
+static void umc_set_speeds(u8 speeds[])
+{
+	int i, tmp;
+
+	outb_p(0x5A, 0x108); /* enable umc */
+
+	out_umc(0xd7, (speedtab[0][speeds[2]] | (speedtab[0][speeds[3]]<<4)));
+	out_umc(0xd6, (speedtab[0][speeds[0]] | (speedtab[0][speeds[1]]<<4)));
+	tmp = 0;
+	for (i = 3; i >= 0; i--)
+		tmp = (tmp << 2) | speedtab[1][speeds[i]];
+	out_umc(0xdc, tmp);
+	for (i = 0; i < 4; i++) {
+		out_umc(0xd0 + i, speedtab[2][speeds[i]]);
+		out_umc(0xd8 + i, speedtab[2][speeds[i]]);
+	}
+	outb_p(0xa5, 0x108); /* disable umc */
+
+	printk("umc8672: drive speeds [0 to 11]: %d %d %d %d\n",
+		speeds[0], speeds[1], speeds[2], speeds[3]);
+}
+
+static void umc_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	ide_hwif_t *mate = hwif->mate;
+	unsigned long flags;
+	const u8 pio = drive->pio_mode - XFER_PIO_0;
+
+	printk("%s: setting umc8672 to PIO mode%d (speed %d)\n",
+		drive->name, pio, pio_to_umc[pio]);
+	if (mate)
+		spin_lock_irqsave(&mate->lock, flags);
+	if (mate && mate->handler) {
+		printk(KERN_ERR "umc8672: other interface is busy: exiting tune_umc()\n");
+	} else {
+		current_speeds[drive->name[2] - 'a'] = pio_to_umc[pio];
+		umc_set_speeds(current_speeds);
+	}
+	if (mate)
+		spin_unlock_irqrestore(&mate->lock, flags);
+}
+
+static const struct ide_port_ops umc8672_port_ops = {
+	.set_pio_mode		= umc_set_pio_mode,
+};
+
+static const struct ide_port_info umc8672_port_info __initconst = {
+	.name			= DRV_NAME,
+	.chipset		= ide_umc8672,
+	.port_ops		= &umc8672_port_ops,
+	.host_flags		= IDE_HFLAG_NO_DMA,
+	.pio_mask		= ATA_PIO4,
+};
+
+static int __init umc8672_probe(void)
+{
+	unsigned long flags;
+
+	if (!request_region(0x108, 2, "umc8672")) {
+		printk(KERN_ERR "umc8672: ports 0x108-0x109 already in use.\n");
+		return 1;
+	}
+	local_irq_save(flags);
+	outb_p(0x5A, 0x108); /* enable umc */
+	if (in_umc (0xd5) != 0xa0) {
+		local_irq_restore(flags);
+		printk(KERN_ERR "umc8672: not found\n");
+		release_region(0x108, 2);
+		return 1;
+	}
+	outb_p(0xa5, 0x108); /* disable umc */
+
+	umc_set_speeds(current_speeds);
+	local_irq_restore(flags);
+
+	return ide_legacy_device_add(&umc8672_port_info, 0);
+}
+
+static bool probe_umc8672;
+
+module_param_named(probe, probe_umc8672, bool, 0);
+MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
+
+static int __init umc8672_init(void)
+{
+	if (probe_umc8672 == 0)
+		goto out;
+
+	if (umc8672_probe() == 0)
+		return 0;
+out:
+	return -ENODEV;
+}
+
+module_init(umc8672_init);
+
+MODULE_AUTHOR("Wolfram Podien");
+MODULE_DESCRIPTION("Support for UMC 8672 IDE chipset");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ide/via82cxxx.c b/drivers/ide/via82cxxx.c
new file mode 100644
index 000000000..63a3aca50
--- /dev/null
+++ b/drivers/ide/via82cxxx.c
@@ -0,0 +1,532 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * VIA IDE driver for Linux. Supported southbridges:
+ *
+ *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
+ *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
+ *   vt8235, vt8237, vt8237a
+ *
+ * Copyright (c) 2000-2002 Vojtech Pavlik
+ * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
+ *
+ * Based on the work of:
+ *	Michel Aubry
+ *	Jeff Garzik
+ *	Andre Hedrick
+ *
+ * Documentation:
+ *	Obsolete device documentation publicly available from via.com.tw
+ *	Current device documentation available under NDA only
+ */
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+#include <linux/dmi.h>
+
+#ifdef CONFIG_PPC_CHRP
+#include <asm/processor.h>
+#endif
+
+#define DRV_NAME "via82cxxx"
+
+#define VIA_IDE_ENABLE		0x40
+#define VIA_IDE_CONFIG		0x41
+#define VIA_FIFO_CONFIG		0x43
+#define VIA_MISC_1		0x44
+#define VIA_MISC_2		0x45
+#define VIA_MISC_3		0x46
+#define VIA_DRIVE_TIMING	0x48
+#define VIA_8BIT_TIMING		0x4e
+#define VIA_ADDRESS_SETUP	0x4c
+#define VIA_UDMA_TIMING		0x50
+
+#define VIA_BAD_PREQ		0x01 /* Crashes if PREQ# till DDACK# set */
+#define VIA_BAD_CLK66		0x02 /* 66 MHz clock doesn't work correctly */
+#define VIA_SET_FIFO		0x04 /* Needs to have FIFO split set */
+#define VIA_NO_UNMASK		0x08 /* Doesn't work with IRQ unmasking on */
+#define VIA_BAD_ID		0x10 /* Has wrong vendor ID (0x1107) */
+#define VIA_BAD_AST		0x20 /* Don't touch Address Setup Timing */
+#define VIA_SATA_PATA		0x80 /* SATA/PATA combined configuration */
+
+enum {
+	VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
+};
+
+/*
+ * VIA SouthBridge chips.
+ */
+
+static struct via_isa_bridge {
+	char *name;
+	u16 id;
+	u8 rev_min;
+	u8 rev_max;
+	u8 udma_mask;
+	u8 flags;
+} via_isa_bridges[] = {
+	{ "vx855",	PCI_DEVICE_ID_VIA_VX855,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
+	{ "vt8261",	PCI_DEVICE_ID_VIA_8261,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt6415",	PCI_DEVICE_ID_VIA_6415,     0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8237a",	PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
+	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
+	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
+	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
+	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
+	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
+	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
+	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
+	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
+	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
+	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
+	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
+	{ "vtxxxx",	PCI_DEVICE_ID_VIA_ANON,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
+	{ NULL }
+};
+
+static unsigned int via_clock;
+static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
+
+struct via82cxxx_dev
+{
+	struct via_isa_bridge *via_config;
+	unsigned int via_80w;
+};
+
+/**
+ *	via_set_speed			-	write timing registers
+ *	@dev: PCI device
+ *	@dn: device
+ *	@timing: IDE timing data to use
+ *
+ *	via_set_speed writes timing values to the chipset registers
+ */
+
+static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct via82cxxx_dev *vdev = host->host_priv;
+	u8 t;
+
+	if (~vdev->via_config->flags & VIA_BAD_AST) {
+		pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
+		t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
+		pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
+	}
+
+	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
+		((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
+
+	pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
+		((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
+
+	switch (vdev->via_config->udma_mask) {
+	case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
+	case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
+	case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
+	case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
+	}
+
+	/* Set UDMA unless device is not UDMA capable */
+	if (vdev->via_config->udma_mask) {
+		u8 udma_etc;
+
+		pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);
+
+		/* clear transfer mode bit */
+		udma_etc &= ~0x20;
+
+		if (timing->udma) {
+			/* preserve 80-wire cable detection bit */
+			udma_etc &= 0x10;
+			udma_etc |= t;
+		}
+
+		pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);
+	}
+}
+
+/**
+ *	via_set_drive		-	configure transfer mode
+ *	@hwif: port
+ *	@drive: Drive to set up
+ *
+ *	via_set_drive() computes timing values configures the chipset to
+ *	a desired transfer mode.  It also can be called by upper layers.
+ */
+
+static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	ide_drive_t *peer = ide_get_pair_dev(drive);
+	struct ide_host *host = dev_get_drvdata(hwif->dev);
+	struct via82cxxx_dev *vdev = host->host_priv;
+	struct ide_timing t, p;
+	unsigned int T, UT;
+	const u8 speed = drive->dma_mode;
+
+	T = 1000000000 / via_clock;
+
+	switch (vdev->via_config->udma_mask) {
+	case ATA_UDMA2: UT = T;   break;
+	case ATA_UDMA4: UT = T/2; break;
+	case ATA_UDMA5: UT = T/3; break;
+	case ATA_UDMA6: UT = T/4; break;
+	default:	UT = T;
+	}
+
+	ide_timing_compute(drive, speed, &t, T, UT);
+
+	if (peer) {
+		ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
+		ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
+	}
+
+	via_set_speed(hwif, drive->dn, &t);
+}
+
+/**
+ *	via_set_pio_mode	-	set host controller for PIO mode
+ *	@hwif: port
+ *	@drive: drive
+ *
+ *	A callback from the upper layers for PIO-only tuning.
+ */
+
+static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+	drive->dma_mode = drive->pio_mode;
+	via_set_drive(hwif, drive);
+}
+
+static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
+{
+	struct via_isa_bridge *via_config;
+
+	for (via_config = via_isa_bridges;
+	     via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)
+		if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
+			!!(via_config->flags & VIA_BAD_ID),
+			via_config->id, NULL))) {
+
+			if ((*isa)->revision >= via_config->rev_min &&
+			    (*isa)->revision <= via_config->rev_max)
+				break;
+			pci_dev_put(*isa);
+		}
+
+	return via_config;
+}
+
+/*
+ * Check and handle 80-wire cable presence
+ */
+static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
+{
+	int i;
+
+	switch (vdev->via_config->udma_mask) {
+		case ATA_UDMA4:
+			for (i = 24; i >= 0; i -= 8)
+				if (((u >> (i & 16)) & 8) &&
+				    ((u >> i) & 0x20) &&
+				     (((u >> i) & 7) < 2)) {
+					/*
+					 * 2x PCI clock and
+					 * UDMA w/ < 3T/cycle
+					 */
+					vdev->via_80w |= (1 << (1 - (i >> 4)));
+				}
+			break;
+
+		case ATA_UDMA5:
+			for (i = 24; i >= 0; i -= 8)
+				if (((u >> i) & 0x10) ||
+				    (((u >> i) & 0x20) &&
+				     (((u >> i) & 7) < 4))) {
+					/* BIOS 80-wire bit or
+					 * UDMA w/ < 60ns/cycle
+					 */
+					vdev->via_80w |= (1 << (1 - (i >> 4)));
+				}
+			break;
+
+		case ATA_UDMA6:
+			for (i = 24; i >= 0; i -= 8)
+				if (((u >> i) & 0x10) ||
+				    (((u >> i) & 0x20) &&
+				     (((u >> i) & 7) < 6))) {
+					/* BIOS 80-wire bit or
+					 * UDMA w/ < 60ns/cycle
+					 */
+					vdev->via_80w |= (1 << (1 - (i >> 4)));
+				}
+			break;
+	}
+}
+
+/**
+ *	init_chipset_via82cxxx	-	initialization handler
+ *	@dev: PCI device
+ *
+ *	The initialization callback. Here we determine the IDE chip type
+ *	and initialize its drive independent registers.
+ */
+
+static int init_chipset_via82cxxx(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct via82cxxx_dev *vdev = host->host_priv;
+	struct via_isa_bridge *via_config = vdev->via_config;
+	u8 t, v;
+	u32 u;
+
+	/*
+	 * Detect cable and configure Clk66
+	 */
+	pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
+
+	via_cable_detect(vdev, u);
+
+	if (via_config->udma_mask == ATA_UDMA4) {
+		/* Enable Clk66 */
+		pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
+	} else if (via_config->flags & VIA_BAD_CLK66) {
+		/* Would cause trouble on 596a and 686 */
+		pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
+	}
+
+	/*
+	 * Check whether interfaces are enabled.
+	 */
+
+	pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
+
+	/*
+	 * Set up FIFO sizes and thresholds.
+	 */
+
+	pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
+
+	/* Disable PREQ# till DDACK# */
+	if (via_config->flags & VIA_BAD_PREQ) {
+		/* Would crash on 586b rev 41 */
+		t &= 0x7f;
+	}
+
+	/* Fix FIFO split between channels */
+	if (via_config->flags & VIA_SET_FIFO) {
+		t &= (t & 0x9f);
+		switch (v & 3) {
+			case 2: t |= 0x00; break;	/* 16 on primary */
+			case 1: t |= 0x60; break;	/* 16 on secondary */
+			case 3: t |= 0x20; break;	/* 8 pri 8 sec */
+		}
+	}
+
+	pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
+
+	return 0;
+}
+
+/*
+ *	Cable special cases
+ */
+
+static const struct dmi_system_id cable_dmi_table[] = {
+	{
+		.ident = "Acer Ferrari 3400",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
+			DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
+		},
+	},
+	{ }
+};
+
+static int via_cable_override(struct pci_dev *pdev)
+{
+	/* Systems by DMI */
+	if (dmi_check_system(cable_dmi_table))
+		return 1;
+
+	/* Arima W730-K8/Targa Visionary 811/... */
+	if (pdev->subsystem_vendor == 0x161F &&
+	    pdev->subsystem_device == 0x2032)
+		return 1;
+
+	return 0;
+}
+
+static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	struct ide_host *host = pci_get_drvdata(pdev);
+	struct via82cxxx_dev *vdev = host->host_priv;
+
+	if (via_cable_override(pdev))
+		return ATA_CBL_PATA40_SHORT;
+
+	if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)
+		return ATA_CBL_SATA;
+
+	if ((vdev->via_80w >> hwif->channel) & 1)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
+static const struct ide_port_ops via_port_ops = {
+	.set_pio_mode		= via_set_pio_mode,
+	.set_dma_mode		= via_set_drive,
+	.cable_detect		= via82cxxx_cable_detect,
+};
+
+static const struct ide_port_info via82cxxx_chipset = {
+	.name		= DRV_NAME,
+	.init_chipset	= init_chipset_via82cxxx,
+	.enablebits	= { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
+	.port_ops	= &via_port_ops,
+	.host_flags	= IDE_HFLAG_PIO_NO_BLACKLIST |
+			  IDE_HFLAG_POST_SET_MODE |
+			  IDE_HFLAG_IO_32BIT,
+	.pio_mask	= ATA_PIO5,
+	.swdma_mask	= ATA_SWDMA2,
+	.mwdma_mask	= ATA_MWDMA2,
+};
+
+static int via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct pci_dev *isa = NULL;
+	struct via_isa_bridge *via_config;
+	struct via82cxxx_dev *vdev;
+	int rc;
+	u8 idx = id->driver_data;
+	struct ide_port_info d;
+
+	d = via82cxxx_chipset;
+
+	/*
+	 * Find the ISA bridge and check we know what it is.
+	 */
+	via_config = via_config_find(&isa);
+
+	/*
+	 * Print the boot message.
+	 */
+	printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
+		pci_name(dev), via_config->name, isa->revision,
+		via_config->udma_mask ? "U" : "MW",
+		via_dma[via_config->udma_mask ?
+			(fls(via_config->udma_mask) - 1) : 0]);
+
+	pci_dev_put(isa);
+
+	/*
+	 * Determine system bus clock.
+	 */
+	via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
+
+	switch (via_clock) {
+	case 33000: via_clock = 33333; break;
+	case 37000: via_clock = 37500; break;
+	case 41000: via_clock = 41666; break;
+	}
+
+	if (via_clock < 20000 || via_clock > 50000) {
+		printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
+			"impossible (%d), using 33 MHz instead.\n", via_clock);
+		via_clock = 33333;
+	}
+
+	if (idx == 1)
+		d.enablebits[1].reg = d.enablebits[0].reg = 0;
+	else
+		d.host_flags |= IDE_HFLAG_NO_AUTODMA;
+
+	if (idx == VIA_IDFLAG_SINGLE)
+		d.host_flags |= IDE_HFLAG_SINGLE;
+
+	if ((via_config->flags & VIA_NO_UNMASK) == 0)
+		d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
+
+	d.udma_mask = via_config->udma_mask;
+
+	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
+	if (!vdev) {
+		printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
+			pci_name(dev));
+		return -ENOMEM;
+	}
+
+	vdev->via_config = via_config;
+
+	rc = ide_pci_init_one(dev, &d, vdev);
+	if (rc)
+		kfree(vdev);
+
+	return rc;
+}
+
+static void via_remove(struct pci_dev *dev)
+{
+	struct ide_host *host = pci_get_drvdata(dev);
+	struct via82cxxx_dev *vdev = host->host_priv;
+
+	ide_pci_remove(dev);
+	kfree(vdev);
+}
+
+static const struct pci_device_id via_pci_tbl[] = {
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415),      1 },
+	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
+	{ 0, },
+};
+MODULE_DEVICE_TABLE(pci, via_pci_tbl);
+
+static struct pci_driver via_pci_driver = {
+	.name 		= "VIA_IDE",
+	.id_table 	= via_pci_tbl,
+	.probe 		= via_init_one,
+	.remove		= via_remove,
+	.suspend	= ide_pci_suspend,
+	.resume		= ide_pci_resume,
+};
+
+static int __init via_ide_init(void)
+{
+	return ide_pci_register_driver(&via_pci_driver);
+}
+
+static void __exit via_ide_exit(void)
+{
+	pci_unregister_driver(&via_pci_driver);
+}
+
+module_init(via_ide_init);
+module_exit(via_ide_exit);
+
+MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick");
+MODULE_DESCRIPTION("PCI driver module for VIA IDE");
+MODULE_LICENSE("GPL");