diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/parport/BUGS-parport | 9 | ||||
| -rw-r--r-- | drivers/parport/Kconfig | 165 | ||||
| -rw-r--r-- | drivers/parport/Makefile | 22 | ||||
| -rw-r--r-- | drivers/parport/TODO-parport | 20 | ||||
| -rw-r--r-- | drivers/parport/daisy.c | 482 | ||||
| -rw-r--r-- | drivers/parport/ieee1284.c | 811 | ||||
| -rw-r--r-- | drivers/parport/ieee1284_ops.c | 915 | ||||
| -rw-r--r-- | drivers/parport/multiface.h | 21 | ||||
| -rw-r--r-- | drivers/parport/parport_amiga.c | 251 | ||||
| -rw-r--r-- | drivers/parport/parport_atari.c | 224 | ||||
| -rw-r--r-- | drivers/parport/parport_ax88796.c | 422 | ||||
| -rw-r--r-- | drivers/parport/parport_cs.c | 196 | ||||
| -rw-r--r-- | drivers/parport/parport_gsc.c | 431 | ||||
| -rw-r--r-- | drivers/parport/parport_gsc.h | 222 | ||||
| -rw-r--r-- | drivers/parport/parport_ip32.c | 2250 | ||||
| -rw-r--r-- | drivers/parport/parport_mfc3.c | 370 | ||||
| -rw-r--r-- | drivers/parport/parport_pc.c | 3361 | ||||
| -rw-r--r-- | drivers/parport/parport_serial.c | 701 | ||||
| -rw-r--r-- | drivers/parport/parport_sunbpp.c | 381 | ||||
| -rw-r--r-- | drivers/parport/probe.c | 283 | ||||
| -rw-r--r-- | drivers/parport/procfs.c | 622 | ||||
| -rw-r--r-- | drivers/parport/share.c | 1391 |
22 files changed, 13550 insertions, 0 deletions
diff --git a/drivers/parport/BUGS-parport b/drivers/parport/BUGS-parport new file mode 100644 index 000000000..622ca3cc7 --- /dev/null +++ b/drivers/parport/BUGS-parport @@ -0,0 +1,9 @@ +Currently known (or at least suspected) bugs in parport: + +o lp doesn't allow you to read status while printing is in progress (is + this still true?). + +o parport_pc_ecp_read_block_pio() is broken. parport will revert to the + software-driven mode in ieee1284_ops.c + +See <URL:http://people.redhat.com/twaugh/parport/>. diff --git a/drivers/parport/Kconfig b/drivers/parport/Kconfig new file mode 100644 index 000000000..a97f4eada --- /dev/null +++ b/drivers/parport/Kconfig @@ -0,0 +1,165 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/kconfig-language.txt. +# +# Parport configuration. +# + +config ARCH_MIGHT_HAVE_PC_PARPORT + bool + help + Select this config option from the architecture Kconfig if + the architecture might have PC parallel port hardware. + +menuconfig PARPORT + tristate "Parallel port support" + depends on HAS_IOMEM + ---help--- + If you want to use devices connected to your machine's parallel port + (the connector at the computer with 25 holes), e.g. printer, ZIP + drive, PLIP link (Parallel Line Internet Protocol is mainly used to + create a mini network by connecting the parallel ports of two local + machines) etc., then you need to say Y here; please read + <file:Documentation/admin-guide/parport.rst> and + <file:drivers/parport/BUGS-parport>. + + For extensive information about drivers for many devices attaching + to the parallel port see <http://www.torque.net/linux-pp.html> on + the WWW. + + It is possible to share a single parallel port among several devices + and it is safe to compile all the corresponding drivers into the + kernel. To compile parallel port support as a module, choose M here: + the module will be called parport. + If you have more than one parallel port and want to specify which + port and IRQ to be used by this driver at module load time, take a + look at <file:Documentation/admin-guide/parport.rst>. + + If unsure, say Y. + +if PARPORT + +config PARPORT_PC + tristate "PC-style hardware" + depends on ARCH_MIGHT_HAVE_PC_PARPORT + help + You should say Y here if you have a PC-style parallel port. All + IBM PC compatible computers and some Alphas have PC-style + parallel ports. PA-RISC owners should only say Y here if they + have a SuperIO parallel port. + + To compile this driver as a module, choose M here: the + module will be called parport_pc. + + If unsure, say Y. + +config PARPORT_SERIAL + tristate "Multi-IO cards (parallel and serial)" + depends on SERIAL_8250_PCI && PARPORT_PC && PCI + help + This adds support for multi-IO PCI cards that have parallel and + serial ports. You should say Y or M here. If you say M, the module + will be called parport_serial. + +config PARPORT_PC_FIFO + bool "Use FIFO/DMA if available" + depends on PARPORT_PC + help + Many parallel port chipsets provide hardware that can speed up + printing. Say Y here if you want to take advantage of that. + + As well as actually having a FIFO, or DMA capability, the kernel + will need to know which IRQ the parallel port has. By default, + parallel port interrupts will not be used, and so neither will the + FIFO. See <file:Documentation/admin-guide/parport.rst> to find out how to + specify which IRQ/DMA to use. + +config PARPORT_PC_SUPERIO + bool "SuperIO chipset support" + depends on PARPORT_PC && !PARISC + help + Saying Y here enables some probes for Super-IO chipsets in order to + find out things like base addresses, IRQ lines and DMA channels. It + is safe to say N. + +config PARPORT_PC_PCMCIA + tristate "Support for PCMCIA management for PC-style ports" + depends on PCMCIA && PARPORT_PC + help + Say Y here if you need PCMCIA support for your PC-style parallel + ports. If unsure, say N. + +config PARPORT_IP32 + tristate "SGI IP32 builtin port" + depends on SGI_IP32 + select PARPORT_NOT_PC + help + Say Y here if you need support for the parallel port on + SGI O2 machines. This code is also available as a module (say M), + called parport_ip32. If in doubt, saying N is the safe plan. + +config PARPORT_AMIGA + tristate "Amiga builtin port" + depends on AMIGA + select PARPORT_NOT_PC + help + Say Y here if you need support for the parallel port hardware on + Amiga machines. This code is also available as a module (say M), + called parport_amiga. If in doubt, saying N is the safe plan. + +config PARPORT_MFC3 + tristate "Multiface III parallel port" + depends on ZORRO + select PARPORT_NOT_PC + help + Say Y here if you need parallel port support for the MFC3 card. + This code is also available as a module (say M), called + parport_mfc3. If in doubt, saying N is the safe plan. + +config PARPORT_ATARI + tristate "Atari hardware" + depends on ATARI + select PARPORT_NOT_PC + help + Say Y here if you need support for the parallel port hardware on + Atari machines. This code is also available as a module (say M), + called parport_atari. If in doubt, saying N is the safe plan. + +config PARPORT_GSC + tristate + default GSC + select PARPORT_NOT_PC + +config PARPORT_SUNBPP + tristate "Sparc hardware" + depends on SBUS + select PARPORT_NOT_PC + help + This driver provides support for the bidirectional parallel port + found on many Sun machines. Note that many of the newer Ultras + actually have pc style hardware instead. + +config PARPORT_AX88796 + tristate "AX88796 Parallel Port" + select PARPORT_NOT_PC + help + Say Y here if you need support for the parallel port hardware on + the AX88796 network controller chip. This code is also available + as a module (say M), called parport_ax88796. + + The driver is not dependent on the AX88796 network driver, and + should not interfere with the networking functions of the chip. + +config PARPORT_1284 + bool "IEEE 1284 transfer modes" + help + If you have a printer that supports status readback or device ID, or + want to use a device that uses enhanced parallel port transfer modes + such as EPP and ECP, say Y here to enable advanced IEEE 1284 + transfer modes. Also say Y if you want device ID information to + appear in /proc/sys/dev/parport/*/autoprobe*. It is safe to say N. + +config PARPORT_NOT_PC + bool + +endif # PARPORT diff --git a/drivers/parport/Makefile b/drivers/parport/Makefile new file mode 100644 index 000000000..6fa41f817 --- /dev/null +++ b/drivers/parport/Makefile @@ -0,0 +1,22 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the kernel Parallel port device drivers. +# + +parport-objs := share.o ieee1284.o ieee1284_ops.o procfs.o + +ifeq ($(CONFIG_PARPORT_1284),y) + parport-objs += daisy.o probe.o +endif + +obj-$(CONFIG_PARPORT) += parport.o +obj-$(CONFIG_PARPORT_PC) += parport_pc.o +obj-$(CONFIG_PARPORT_SERIAL) += parport_serial.o +obj-$(CONFIG_PARPORT_PC_PCMCIA) += parport_cs.o +obj-$(CONFIG_PARPORT_AMIGA) += parport_amiga.o +obj-$(CONFIG_PARPORT_MFC3) += parport_mfc3.o +obj-$(CONFIG_PARPORT_ATARI) += parport_atari.o +obj-$(CONFIG_PARPORT_SUNBPP) += parport_sunbpp.o +obj-$(CONFIG_PARPORT_GSC) += parport_gsc.o +obj-$(CONFIG_PARPORT_AX88796) += parport_ax88796.o +obj-$(CONFIG_PARPORT_IP32) += parport_ip32.o
\ No newline at end of file diff --git a/drivers/parport/TODO-parport b/drivers/parport/TODO-parport new file mode 100644 index 000000000..089b14ee4 --- /dev/null +++ b/drivers/parport/TODO-parport @@ -0,0 +1,20 @@ +Things to be done. + +0. Fix the bugs (see BUGS-parport). + +1. Proper documentation. + +2. A better lp.c: + + a) ECP support would be nice. This can only work if both the port and + the printer support it. + + b) Handle status readback automatically. IEEE1284 printers can post status + bits when they have something to say. We should read out and deal + with (maybe just log) whatever the printer wants to tell the world. + +3. Support more hardware (eg m68k, Sun bpp). + +4. A better PLIP (make use of bidirectional/ECP/EPP ports). + +See <URL:http://people.redhat.com/twaugh/parport/>. diff --git a/drivers/parport/daisy.c b/drivers/parport/daisy.c new file mode 100644 index 000000000..5484a46da --- /dev/null +++ b/drivers/parport/daisy.c @@ -0,0 +1,482 @@ +/* + * IEEE 1284.3 Parallel port daisy chain and multiplexor code + * + * Copyright (C) 1999, 2000 Tim Waugh <tim@cyberelk.demon.co.uk> + * + * 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. + * + * ??-12-1998: Initial implementation. + * 31-01-1999: Make port-cloning transparent. + * 13-02-1999: Move DeviceID technique from parport_probe. + * 13-03-1999: Get DeviceID from non-IEEE 1284.3 devices too. + * 22-02-2000: Count devices that are actually detected. + * + * Any part of this program may be used in documents licensed under + * the GNU Free Documentation License, Version 1.1 or any later version + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/delay.h> +#include <linux/slab.h> +#include <linux/sched/signal.h> + +#include <asm/current.h> +#include <linux/uaccess.h> + +#undef DEBUG + +#ifdef DEBUG +#define DPRINTK(stuff...) printk(stuff) +#else +#define DPRINTK(stuff...) +#endif + +static struct daisydev { + struct daisydev *next; + struct parport *port; + int daisy; + int devnum; +} *topology = NULL; +static DEFINE_SPINLOCK(topology_lock); + +static int numdevs; + +/* Forward-declaration of lower-level functions. */ +static int mux_present(struct parport *port); +static int num_mux_ports(struct parport *port); +static int select_port(struct parport *port); +static int assign_addrs(struct parport *port); + +/* Add a device to the discovered topology. */ +static void add_dev(int devnum, struct parport *port, int daisy) +{ + struct daisydev *newdev, **p; + newdev = kmalloc(sizeof(struct daisydev), GFP_KERNEL); + if (newdev) { + newdev->port = port; + newdev->daisy = daisy; + newdev->devnum = devnum; + spin_lock(&topology_lock); + for (p = &topology; *p && (*p)->devnum<devnum; p = &(*p)->next) + ; + newdev->next = *p; + *p = newdev; + spin_unlock(&topology_lock); + } +} + +/* Clone a parport (actually, make an alias). */ +static struct parport *clone_parport(struct parport *real, int muxport) +{ + struct parport *extra = parport_register_port(real->base, + real->irq, + real->dma, + real->ops); + if (extra) { + extra->portnum = real->portnum; + extra->physport = real; + extra->muxport = muxport; + real->slaves[muxport-1] = extra; + } + + return extra; +} + +/* Discover the IEEE1284.3 topology on a port -- muxes and daisy chains. + * Return value is number of devices actually detected. */ +int parport_daisy_init(struct parport *port) +{ + int detected = 0; + char *deviceid; + static const char *th[] = { /*0*/"th", "st", "nd", "rd", "th" }; + int num_ports; + int i; + int last_try = 0; + +again: + /* Because this is called before any other devices exist, + * we don't have to claim exclusive access. */ + + /* If mux present on normal port, need to create new + * parports for each extra port. */ + if (port->muxport < 0 && mux_present(port) && + /* don't be fooled: a mux must have 2 or 4 ports. */ + ((num_ports = num_mux_ports(port)) == 2 || num_ports == 4)) { + /* Leave original as port zero. */ + port->muxport = 0; + printk(KERN_INFO + "%s: 1st (default) port of %d-way multiplexor\n", + port->name, num_ports); + for (i = 1; i < num_ports; i++) { + /* Clone the port. */ + struct parport *extra = clone_parport(port, i); + if (!extra) { + if (signal_pending(current)) + break; + + schedule(); + continue; + } + + printk(KERN_INFO + "%s: %d%s port of %d-way multiplexor on %s\n", + extra->name, i + 1, th[i + 1], num_ports, + port->name); + + /* Analyse that port too. We won't recurse + forever because of the 'port->muxport < 0' + test above. */ + parport_daisy_init(extra); + } + } + + if (port->muxport >= 0) + select_port(port); + + parport_daisy_deselect_all(port); + detected += assign_addrs(port); + + /* Count the potential legacy device at the end. */ + add_dev(numdevs++, port, -1); + + /* Find out the legacy device's IEEE 1284 device ID. */ + deviceid = kmalloc(1024, GFP_KERNEL); + if (deviceid) { + if (parport_device_id(numdevs - 1, deviceid, 1024) > 2) + detected++; + + kfree(deviceid); + } + + if (!detected && !last_try) { + /* No devices were detected. Perhaps they are in some + funny state; let's try to reset them and see if + they wake up. */ + parport_daisy_fini(port); + parport_write_control(port, PARPORT_CONTROL_SELECT); + udelay(50); + parport_write_control(port, + PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_INIT); + udelay(50); + last_try = 1; + goto again; + } + + return detected; +} + +/* Forget about devices on a physical port. */ +void parport_daisy_fini(struct parport *port) +{ + struct daisydev **p; + + spin_lock(&topology_lock); + p = &topology; + while (*p) { + struct daisydev *dev = *p; + if (dev->port != port) { + p = &dev->next; + continue; + } + *p = dev->next; + kfree(dev); + } + + /* Gaps in the numbering could be handled better. How should + someone enumerate through all IEEE1284.3 devices in the + topology?. */ + if (!topology) numdevs = 0; + spin_unlock(&topology_lock); + return; +} + +/** + * parport_open - find a device by canonical device number + * @devnum: canonical device number + * @name: name to associate with the device + * + * This function is similar to parport_register_device(), except + * that it locates a device by its number rather than by the port + * it is attached to. + * + * All parameters except for @devnum are the same as for + * parport_register_device(). The return value is the same as + * for parport_register_device(). + **/ + +struct pardevice *parport_open(int devnum, const char *name) +{ + struct daisydev *p = topology; + struct parport *port; + struct pardevice *dev; + int daisy; + + spin_lock(&topology_lock); + while (p && p->devnum != devnum) + p = p->next; + + if (!p) { + spin_unlock(&topology_lock); + return NULL; + } + + daisy = p->daisy; + port = parport_get_port(p->port); + spin_unlock(&topology_lock); + + dev = parport_register_device(port, name, NULL, NULL, NULL, 0, NULL); + parport_put_port(port); + if (!dev) + return NULL; + + dev->daisy = daisy; + + /* Check that there really is a device to select. */ + if (daisy >= 0) { + int selected; + parport_claim_or_block(dev); + selected = port->daisy; + parport_release(dev); + + if (selected != daisy) { + /* No corresponding device. */ + parport_unregister_device(dev); + return NULL; + } + } + + return dev; +} + +/** + * parport_close - close a device opened with parport_open() + * @dev: device to close + * + * This is to parport_open() as parport_unregister_device() is to + * parport_register_device(). + **/ + +void parport_close(struct pardevice *dev) +{ + parport_unregister_device(dev); +} + +/* Send a daisy-chain-style CPP command packet. */ +static int cpp_daisy(struct parport *port, int cmd) +{ + unsigned char s; + + parport_data_forward(port); + parport_write_data(port, 0xaa); udelay(2); + parport_write_data(port, 0x55); udelay(2); + parport_write_data(port, 0x00); udelay(2); + parport_write_data(port, 0xff); udelay(2); + s = parport_read_status(port) & (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR); + if (s != (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR)) { + DPRINTK(KERN_DEBUG "%s: cpp_daisy: aa5500ff(%02x)\n", + port->name, s); + return -ENXIO; + } + + parport_write_data(port, 0x87); udelay(2); + s = parport_read_status(port) & (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR); + if (s != (PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) { + DPRINTK(KERN_DEBUG "%s: cpp_daisy: aa5500ff87(%02x)\n", + port->name, s); + return -ENXIO; + } + + parport_write_data(port, 0x78); udelay(2); + parport_write_data(port, cmd); udelay(2); + parport_frob_control(port, + PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + udelay(1); + s = parport_read_status(port); + parport_frob_control(port, PARPORT_CONTROL_STROBE, 0); + udelay(1); + parport_write_data(port, 0xff); udelay(2); + + return s; +} + +/* Send a mux-style CPP command packet. */ +static int cpp_mux(struct parport *port, int cmd) +{ + unsigned char s; + int rc; + + parport_data_forward(port); + parport_write_data(port, 0xaa); udelay(2); + parport_write_data(port, 0x55); udelay(2); + parport_write_data(port, 0xf0); udelay(2); + parport_write_data(port, 0x0f); udelay(2); + parport_write_data(port, 0x52); udelay(2); + parport_write_data(port, 0xad); udelay(2); + parport_write_data(port, cmd); udelay(2); + + s = parport_read_status(port); + if (!(s & PARPORT_STATUS_ACK)) { + DPRINTK(KERN_DEBUG "%s: cpp_mux: aa55f00f52ad%02x(%02x)\n", + port->name, cmd, s); + return -EIO; + } + + rc = (((s & PARPORT_STATUS_SELECT ? 1 : 0) << 0) | + ((s & PARPORT_STATUS_PAPEROUT ? 1 : 0) << 1) | + ((s & PARPORT_STATUS_BUSY ? 0 : 1) << 2) | + ((s & PARPORT_STATUS_ERROR ? 0 : 1) << 3)); + + return rc; +} + +void parport_daisy_deselect_all(struct parport *port) +{ + cpp_daisy(port, 0x30); +} + +int parport_daisy_select(struct parport *port, int daisy, int mode) +{ + switch (mode) + { + // For these modes we should switch to EPP mode: + case IEEE1284_MODE_EPP: + case IEEE1284_MODE_EPPSL: + case IEEE1284_MODE_EPPSWE: + return !(cpp_daisy(port, 0x20 + daisy) & + PARPORT_STATUS_ERROR); + + // For these modes we should switch to ECP mode: + case IEEE1284_MODE_ECP: + case IEEE1284_MODE_ECPRLE: + case IEEE1284_MODE_ECPSWE: + return !(cpp_daisy(port, 0xd0 + daisy) & + PARPORT_STATUS_ERROR); + + // Nothing was told for BECP in Daisy chain specification. + // May be it's wise to use ECP? + case IEEE1284_MODE_BECP: + // Others use compat mode + case IEEE1284_MODE_NIBBLE: + case IEEE1284_MODE_BYTE: + case IEEE1284_MODE_COMPAT: + default: + return !(cpp_daisy(port, 0xe0 + daisy) & + PARPORT_STATUS_ERROR); + } +} + +static int mux_present(struct parport *port) +{ + return cpp_mux(port, 0x51) == 3; +} + +static int num_mux_ports(struct parport *port) +{ + return cpp_mux(port, 0x58); +} + +static int select_port(struct parport *port) +{ + int muxport = port->muxport; + return cpp_mux(port, 0x60 + muxport) == muxport; +} + +static int assign_addrs(struct parport *port) +{ + unsigned char s; + unsigned char daisy; + int thisdev = numdevs; + int detected; + char *deviceid; + + parport_data_forward(port); + parport_write_data(port, 0xaa); udelay(2); + parport_write_data(port, 0x55); udelay(2); + parport_write_data(port, 0x00); udelay(2); + parport_write_data(port, 0xff); udelay(2); + s = parport_read_status(port) & (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR); + if (s != (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR)) { + DPRINTK(KERN_DEBUG "%s: assign_addrs: aa5500ff(%02x)\n", + port->name, s); + return 0; + } + + parport_write_data(port, 0x87); udelay(2); + s = parport_read_status(port) & (PARPORT_STATUS_BUSY + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_ERROR); + if (s != (PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR)) { + DPRINTK(KERN_DEBUG "%s: assign_addrs: aa5500ff87(%02x)\n", + port->name, s); + return 0; + } + + parport_write_data(port, 0x78); udelay(2); + s = parport_read_status(port); + + for (daisy = 0; + (s & (PARPORT_STATUS_PAPEROUT|PARPORT_STATUS_SELECT)) + == (PARPORT_STATUS_PAPEROUT|PARPORT_STATUS_SELECT) + && daisy < 4; + ++daisy) { + parport_write_data(port, daisy); + udelay(2); + parport_frob_control(port, + PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + udelay(1); + parport_frob_control(port, PARPORT_CONTROL_STROBE, 0); + udelay(1); + + add_dev(numdevs++, port, daisy); + + /* See if this device thought it was the last in the + * chain. */ + if (!(s & PARPORT_STATUS_BUSY)) + break; + + /* We are seeing pass through status now. We see + last_dev from next device or if last_dev does not + work status lines from some non-daisy chain + device. */ + s = parport_read_status(port); + } + + parport_write_data(port, 0xff); udelay(2); + detected = numdevs - thisdev; + DPRINTK(KERN_DEBUG "%s: Found %d daisy-chained devices\n", port->name, + detected); + + /* Ask the new devices to introduce themselves. */ + deviceid = kmalloc(1024, GFP_KERNEL); + if (!deviceid) return 0; + + for (daisy = 0; thisdev < numdevs; thisdev++, daisy++) + parport_device_id(thisdev, deviceid, 1024); + + kfree(deviceid); + return detected; +} diff --git a/drivers/parport/ieee1284.c b/drivers/parport/ieee1284.c new file mode 100644 index 000000000..f12b9da69 --- /dev/null +++ b/drivers/parport/ieee1284.c @@ -0,0 +1,811 @@ +/* + * IEEE-1284 implementation for parport. + * + * Authors: Phil Blundell <philb@gnu.org> + * Carsten Gross <carsten@sol.wohnheim.uni-ulm.de> + * Jose Renau <renau@acm.org> + * Tim Waugh <tim@cyberelk.demon.co.uk> (largely rewritten) + * + * This file is responsible for IEEE 1284 negotiation, and for handing + * read/write requests to low-level drivers. + * + * Any part of this program may be used in documents licensed under + * the GNU Free Documentation License, Version 1.1 or any later version + * published by the Free Software Foundation. + * + * Various hacks, Fred Barnes <frmb2@ukc.ac.uk>, 04/2000 + */ + +#include <linux/module.h> +#include <linux/threads.h> +#include <linux/parport.h> +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/timer.h> +#include <linux/sched/signal.h> + +#undef DEBUG /* undef me for production */ + +#ifdef CONFIG_LP_CONSOLE +#undef DEBUG /* Don't want a garbled console */ +#endif + +#ifdef DEBUG +#define DPRINTK(stuff...) printk (stuff) +#else +#define DPRINTK(stuff...) +#endif + +/* Make parport_wait_peripheral wake up. + * It will be useful to call this from an interrupt handler. */ +static void parport_ieee1284_wakeup (struct parport *port) +{ + up (&port->physport->ieee1284.irq); +} + +static void timeout_waiting_on_port (struct timer_list *t) +{ + struct parport *port = from_timer(port, t, timer); + + parport_ieee1284_wakeup (port); +} + +/** + * parport_wait_event - wait for an event on a parallel port + * @port: port to wait on + * @timeout: time to wait (in jiffies) + * + * This function waits for up to @timeout jiffies for an + * interrupt to occur on a parallel port. If the port timeout is + * set to zero, it returns immediately. + * + * If an interrupt occurs before the timeout period elapses, this + * function returns zero immediately. If it times out, it returns + * one. An error code less than zero indicates an error (most + * likely a pending signal), and the calling code should finish + * what it's doing as soon as it can. + */ + +int parport_wait_event (struct parport *port, signed long timeout) +{ + int ret; + + if (!port->physport->cad->timeout) + /* Zero timeout is special, and we can't down() the + semaphore. */ + return 1; + + timer_setup(&port->timer, timeout_waiting_on_port, 0); + mod_timer(&port->timer, jiffies + timeout); + ret = down_interruptible (&port->physport->ieee1284.irq); + if (!del_timer_sync(&port->timer) && !ret) + /* Timed out. */ + ret = 1; + + return ret; +} + +/** + * parport_poll_peripheral - poll status lines + * @port: port to watch + * @mask: status lines to watch + * @result: desired values of chosen status lines + * @usec: timeout + * + * This function busy-waits until the masked status lines have + * the desired values, or until the timeout period elapses. The + * @mask and @result parameters are bitmasks, with the bits + * defined by the constants in parport.h: %PARPORT_STATUS_BUSY, + * and so on. + * + * This function does not call schedule(); instead it busy-waits + * using udelay(). It currently has a resolution of 5usec. + * + * If the status lines take on the desired values before the + * timeout period elapses, parport_poll_peripheral() returns zero + * immediately. A return value greater than zero indicates + * a timeout. An error code (less than zero) indicates an error, + * most likely a signal that arrived, and the caller should + * finish what it is doing as soon as possible. +*/ + +int parport_poll_peripheral(struct parport *port, + unsigned char mask, + unsigned char result, + int usec) +{ + /* Zero return code is success, >0 is timeout. */ + int count = usec / 5 + 2; + int i; + unsigned char status; + for (i = 0; i < count; i++) { + status = parport_read_status (port); + if ((status & mask) == result) + return 0; + if (signal_pending (current)) + return -EINTR; + if (need_resched()) + break; + if (i >= 2) + udelay (5); + } + + return 1; +} + +/** + * parport_wait_peripheral - wait for status lines to change in 35ms + * @port: port to watch + * @mask: status lines to watch + * @result: desired values of chosen status lines + * + * This function waits until the masked status lines have the + * desired values, or until 35ms have elapsed (see IEEE 1284-1994 + * page 24 to 25 for why this value in particular is hardcoded). + * The @mask and @result parameters are bitmasks, with the bits + * defined by the constants in parport.h: %PARPORT_STATUS_BUSY, + * and so on. + * + * The port is polled quickly to start off with, in anticipation + * of a fast response from the peripheral. This fast polling + * time is configurable (using /proc), and defaults to 500usec. + * If the timeout for this port (see parport_set_timeout()) is + * zero, the fast polling time is 35ms, and this function does + * not call schedule(). + * + * If the timeout for this port is non-zero, after the fast + * polling fails it uses parport_wait_event() to wait for up to + * 10ms, waking up if an interrupt occurs. + */ + +int parport_wait_peripheral(struct parport *port, + unsigned char mask, + unsigned char result) +{ + int ret; + int usec; + unsigned long deadline; + unsigned char status; + + usec = port->physport->spintime; /* usecs of fast polling */ + if (!port->physport->cad->timeout) + /* A zero timeout is "special": busy wait for the + entire 35ms. */ + usec = 35000; + + /* Fast polling. + * + * This should be adjustable. + * How about making a note (in the device structure) of how long + * it takes, so we know for next time? + */ + ret = parport_poll_peripheral (port, mask, result, usec); + if (ret != 1) + return ret; + + if (!port->physport->cad->timeout) + /* We may be in an interrupt handler, so we can't poll + * slowly anyway. */ + return 1; + + /* 40ms of slow polling. */ + deadline = jiffies + msecs_to_jiffies(40); + while (time_before (jiffies, deadline)) { + if (signal_pending (current)) + return -EINTR; + + /* Wait for 10ms (or until an interrupt occurs if + * the handler is set) */ + if ((ret = parport_wait_event (port, msecs_to_jiffies(10))) < 0) + return ret; + + status = parport_read_status (port); + if ((status & mask) == result) + return 0; + + if (!ret) { + /* parport_wait_event didn't time out, but the + * peripheral wasn't actually ready either. + * Wait for another 10ms. */ + schedule_timeout_interruptible(msecs_to_jiffies(10)); + } + } + + return 1; +} + +#ifdef CONFIG_PARPORT_1284 +/* Terminate a negotiated mode. */ +static void parport_ieee1284_terminate (struct parport *port) +{ + int r; + port = port->physport; + + /* EPP terminates differently. */ + switch (port->ieee1284.mode) { + case IEEE1284_MODE_EPP: + case IEEE1284_MODE_EPPSL: + case IEEE1284_MODE_EPPSWE: + /* Terminate from EPP mode. */ + + /* Event 68: Set nInit low */ + parport_frob_control (port, PARPORT_CONTROL_INIT, 0); + udelay (50); + + /* Event 69: Set nInit high, nSelectIn low */ + parport_frob_control (port, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_INIT, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_INIT); + break; + + case IEEE1284_MODE_ECP: + case IEEE1284_MODE_ECPRLE: + case IEEE1284_MODE_ECPSWE: + /* In ECP we can only terminate from fwd idle phase. */ + if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE) { + /* Event 47: Set nInit high */ + parport_frob_control (port, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD); + + /* Event 49: PError goes high */ + r = parport_wait_peripheral (port, + PARPORT_STATUS_PAPEROUT, + PARPORT_STATUS_PAPEROUT); + if (r) + DPRINTK (KERN_INFO "%s: Timeout at event 49\n", + port->name); + + parport_data_forward (port); + DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n", + port->name); + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + } + + /* fall through */ + + default: + /* Terminate from all other modes. */ + + /* Event 22: Set nSelectIn low, nAutoFd high */ + parport_frob_control (port, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_SELECT); + + /* Event 24: nAck goes low */ + r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0); + if (r) + DPRINTK (KERN_INFO "%s: Timeout at event 24\n", + port->name); + + /* Event 25: Set nAutoFd low */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 27: nAck goes high */ + r = parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK); + if (r) + DPRINTK (KERN_INFO "%s: Timeout at event 27\n", + port->name); + + /* Event 29: Set nAutoFd high */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + } + + port->ieee1284.mode = IEEE1284_MODE_COMPAT; + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + DPRINTK (KERN_DEBUG "%s: In compatibility (forward idle) mode\n", + port->name); +} +#endif /* IEEE1284 support */ + +/** + * parport_negotiate - negotiate an IEEE 1284 mode + * @port: port to use + * @mode: mode to negotiate to + * + * Use this to negotiate to a particular IEEE 1284 transfer mode. + * The @mode parameter should be one of the constants in + * parport.h starting %IEEE1284_MODE_xxx. + * + * The return value is 0 if the peripheral has accepted the + * negotiation to the mode specified, -1 if the peripheral is not + * IEEE 1284 compliant (or not present), or 1 if the peripheral + * has rejected the negotiation. + */ + +int parport_negotiate (struct parport *port, int mode) +{ +#ifndef CONFIG_PARPORT_1284 + if (mode == IEEE1284_MODE_COMPAT) + return 0; + printk (KERN_ERR "parport: IEEE1284 not supported in this kernel\n"); + return -1; +#else + int m = mode & ~IEEE1284_ADDR; + int r; + unsigned char xflag; + + port = port->physport; + + /* Is there anything to do? */ + if (port->ieee1284.mode == mode) + return 0; + + /* Is the difference just an address-or-not bit? */ + if ((port->ieee1284.mode & ~IEEE1284_ADDR) == (mode & ~IEEE1284_ADDR)){ + port->ieee1284.mode = mode; + return 0; + } + + /* Go to compatibility forward idle mode */ + if (port->ieee1284.mode != IEEE1284_MODE_COMPAT) + parport_ieee1284_terminate (port); + + if (mode == IEEE1284_MODE_COMPAT) + /* Compatibility mode: no negotiation. */ + return 0; + + switch (mode) { + case IEEE1284_MODE_ECPSWE: + m = IEEE1284_MODE_ECP; + break; + case IEEE1284_MODE_EPPSL: + case IEEE1284_MODE_EPPSWE: + m = IEEE1284_MODE_EPP; + break; + case IEEE1284_MODE_BECP: + return -ENOSYS; /* FIXME (implement BECP) */ + } + + if (mode & IEEE1284_EXT_LINK) + m = 1<<7; /* request extensibility link */ + + port->ieee1284.phase = IEEE1284_PH_NEGOTIATION; + + /* Start off with nStrobe and nAutoFd high, and nSelectIn low */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE + | PARPORT_CONTROL_AUTOFD + | PARPORT_CONTROL_SELECT, + PARPORT_CONTROL_SELECT); + udelay(1); + + /* Event 0: Set data */ + parport_data_forward (port); + parport_write_data (port, m); + udelay (400); /* Shouldn't need to wait this long. */ + + /* Event 1: Set nSelectIn high, nAutoFd low */ + parport_frob_control (port, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 2: PError, Select, nFault go high, nAck goes low */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ERROR + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_PAPEROUT + | PARPORT_STATUS_ACK, + PARPORT_STATUS_ERROR + | PARPORT_STATUS_SELECT + | PARPORT_STATUS_PAPEROUT)) { + /* Timeout */ + parport_frob_control (port, + PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_SELECT); + DPRINTK (KERN_DEBUG + "%s: Peripheral not IEEE1284 compliant (0x%02X)\n", + port->name, parport_read_status (port)); + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + return -1; /* Not IEEE1284 compliant */ + } + + /* Event 3: Set nStrobe low */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + + /* Event 4: Set nStrobe and nAutoFd high */ + udelay (5); + parport_frob_control (port, + PARPORT_CONTROL_STROBE + | PARPORT_CONTROL_AUTOFD, + 0); + + /* Event 6: nAck goes high */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* This shouldn't really happen with a compliant device. */ + DPRINTK (KERN_DEBUG + "%s: Mode 0x%02x not supported? (0x%02x)\n", + port->name, mode, port->ops->read_status (port)); + parport_ieee1284_terminate (port); + return 1; + } + + xflag = parport_read_status (port) & PARPORT_STATUS_SELECT; + + /* xflag should be high for all modes other than nibble (0). */ + if (mode && !xflag) { + /* Mode not supported. */ + DPRINTK (KERN_DEBUG "%s: Mode 0x%02x rejected by peripheral\n", + port->name, mode); + parport_ieee1284_terminate (port); + return 1; + } + + /* More to do if we've requested extensibility link. */ + if (mode & IEEE1284_EXT_LINK) { + m = mode & 0x7f; + udelay (1); + parport_write_data (port, m); + udelay (1); + + /* Event 51: Set nStrobe low */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + + /* Event 52: nAck goes low */ + if (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) { + /* This peripheral is _very_ slow. */ + DPRINTK (KERN_DEBUG + "%s: Event 52 didn't happen\n", + port->name); + parport_ieee1284_terminate (port); + return 1; + } + + /* Event 53: Set nStrobe high */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + 0); + + /* Event 55: nAck goes high */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* This shouldn't really happen with a compliant + * device. */ + DPRINTK (KERN_DEBUG + "%s: Mode 0x%02x not supported? (0x%02x)\n", + port->name, mode, + port->ops->read_status (port)); + parport_ieee1284_terminate (port); + return 1; + } + + /* Event 54: Peripheral sets XFlag to reflect support */ + xflag = parport_read_status (port) & PARPORT_STATUS_SELECT; + + /* xflag should be high. */ + if (!xflag) { + /* Extended mode not supported. */ + DPRINTK (KERN_DEBUG "%s: Extended mode 0x%02x not " + "supported\n", port->name, mode); + parport_ieee1284_terminate (port); + return 1; + } + + /* Any further setup is left to the caller. */ + } + + /* Mode is supported */ + DPRINTK (KERN_DEBUG "%s: In mode 0x%02x\n", port->name, mode); + port->ieee1284.mode = mode; + + /* But ECP is special */ + if (!(mode & IEEE1284_EXT_LINK) && (m & IEEE1284_MODE_ECP)) { + port->ieee1284.phase = IEEE1284_PH_ECP_SETUP; + + /* Event 30: Set nAutoFd low */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 31: PError goes high. */ + r = parport_wait_peripheral (port, + PARPORT_STATUS_PAPEROUT, + PARPORT_STATUS_PAPEROUT); + if (r) { + DPRINTK (KERN_INFO "%s: Timeout at event 31\n", + port->name); + } + + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n", + port->name); + } else switch (mode) { + case IEEE1284_MODE_NIBBLE: + case IEEE1284_MODE_BYTE: + port->ieee1284.phase = IEEE1284_PH_REV_IDLE; + break; + default: + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + } + + + return 0; +#endif /* IEEE1284 support */ +} + +/* Acknowledge that the peripheral has data available. + * Events 18-20, in order to get from Reverse Idle phase + * to Host Busy Data Available. + * This will most likely be called from an interrupt. + * Returns zero if data was available. + */ +#ifdef CONFIG_PARPORT_1284 +static int parport_ieee1284_ack_data_avail (struct parport *port) +{ + if (parport_read_status (port) & PARPORT_STATUS_ERROR) + /* Event 18 didn't happen. */ + return -1; + + /* Event 20: nAutoFd goes high. */ + port->ops->frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; + return 0; +} +#endif /* IEEE1284 support */ + +/* Handle an interrupt. */ +void parport_ieee1284_interrupt (void *handle) +{ + struct parport *port = handle; + parport_ieee1284_wakeup (port); + +#ifdef CONFIG_PARPORT_1284 + if (port->ieee1284.phase == IEEE1284_PH_REV_IDLE) { + /* An interrupt in this phase means that data + * is now available. */ + DPRINTK (KERN_DEBUG "%s: Data available\n", port->name); + parport_ieee1284_ack_data_avail (port); + } +#endif /* IEEE1284 support */ +} + +/** + * parport_write - write a block of data to a parallel port + * @port: port to write to + * @buffer: data buffer (in kernel space) + * @len: number of bytes of data to transfer + * + * This will write up to @len bytes of @buffer to the port + * specified, using the IEEE 1284 transfer mode most recently + * negotiated to (using parport_negotiate()), as long as that + * mode supports forward transfers (host to peripheral). + * + * It is the caller's responsibility to ensure that the first + * @len bytes of @buffer are valid. + * + * This function returns the number of bytes transferred (if zero + * or positive), or else an error code. + */ + +ssize_t parport_write (struct parport *port, const void *buffer, size_t len) +{ +#ifndef CONFIG_PARPORT_1284 + return port->ops->compat_write_data (port, buffer, len, 0); +#else + ssize_t retval; + int mode = port->ieee1284.mode; + int addr = mode & IEEE1284_ADDR; + size_t (*fn) (struct parport *, const void *, size_t, int); + + /* Ignore the device-ID-request bit and the address bit. */ + mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR); + + /* Use the mode we're in. */ + switch (mode) { + case IEEE1284_MODE_NIBBLE: + case IEEE1284_MODE_BYTE: + parport_negotiate (port, IEEE1284_MODE_COMPAT); + /* fall through */ + case IEEE1284_MODE_COMPAT: + DPRINTK (KERN_DEBUG "%s: Using compatibility mode\n", + port->name); + fn = port->ops->compat_write_data; + break; + + case IEEE1284_MODE_EPP: + DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name); + if (addr) { + fn = port->ops->epp_write_addr; + } else { + fn = port->ops->epp_write_data; + } + break; + case IEEE1284_MODE_EPPSWE: + DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n", + port->name); + if (addr) { + fn = parport_ieee1284_epp_write_addr; + } else { + fn = parport_ieee1284_epp_write_data; + } + break; + case IEEE1284_MODE_ECP: + case IEEE1284_MODE_ECPRLE: + DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name); + if (addr) { + fn = port->ops->ecp_write_addr; + } else { + fn = port->ops->ecp_write_data; + } + break; + + case IEEE1284_MODE_ECPSWE: + DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n", + port->name); + /* The caller has specified that it must be emulated, + * even if we have ECP hardware! */ + if (addr) { + fn = parport_ieee1284_ecp_write_addr; + } else { + fn = parport_ieee1284_ecp_write_data; + } + break; + + default: + DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name, + port->ieee1284.mode); + return -ENOSYS; + } + + retval = (*fn) (port, buffer, len, 0); + DPRINTK (KERN_DEBUG "%s: wrote %d/%d bytes\n", port->name, retval, len); + return retval; +#endif /* IEEE1284 support */ +} + +/** + * parport_read - read a block of data from a parallel port + * @port: port to read from + * @buffer: data buffer (in kernel space) + * @len: number of bytes of data to transfer + * + * This will read up to @len bytes of @buffer to the port + * specified, using the IEEE 1284 transfer mode most recently + * negotiated to (using parport_negotiate()), as long as that + * mode supports reverse transfers (peripheral to host). + * + * It is the caller's responsibility to ensure that the first + * @len bytes of @buffer are available to write to. + * + * This function returns the number of bytes transferred (if zero + * or positive), or else an error code. + */ + +ssize_t parport_read (struct parport *port, void *buffer, size_t len) +{ +#ifndef CONFIG_PARPORT_1284 + printk (KERN_ERR "parport: IEEE1284 not supported in this kernel\n"); + return -ENODEV; +#else + int mode = port->physport->ieee1284.mode; + int addr = mode & IEEE1284_ADDR; + size_t (*fn) (struct parport *, void *, size_t, int); + + /* Ignore the device-ID-request bit and the address bit. */ + mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR); + + /* Use the mode we're in. */ + switch (mode) { + case IEEE1284_MODE_COMPAT: + /* if we can tri-state use BYTE mode instead of NIBBLE mode, + * if that fails, revert to NIBBLE mode -- ought to store somewhere + * the device's ability to do BYTE mode reverse transfers, so we don't + * end up needlessly calling negotiate(BYTE) repeately.. (fb) + */ + if ((port->physport->modes & PARPORT_MODE_TRISTATE) && + !parport_negotiate (port, IEEE1284_MODE_BYTE)) { + /* got into BYTE mode OK */ + DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name); + fn = port->ops->byte_read_data; + break; + } + if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) { + return -EIO; + } + /* fall through to NIBBLE */ + case IEEE1284_MODE_NIBBLE: + DPRINTK (KERN_DEBUG "%s: Using nibble mode\n", port->name); + fn = port->ops->nibble_read_data; + break; + + case IEEE1284_MODE_BYTE: + DPRINTK (KERN_DEBUG "%s: Using byte mode\n", port->name); + fn = port->ops->byte_read_data; + break; + + case IEEE1284_MODE_EPP: + DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name); + if (addr) { + fn = port->ops->epp_read_addr; + } else { + fn = port->ops->epp_read_data; + } + break; + case IEEE1284_MODE_EPPSWE: + DPRINTK (KERN_DEBUG "%s: Using software-emulated EPP mode\n", + port->name); + if (addr) { + fn = parport_ieee1284_epp_read_addr; + } else { + fn = parport_ieee1284_epp_read_data; + } + break; + case IEEE1284_MODE_ECP: + case IEEE1284_MODE_ECPRLE: + DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name); + fn = port->ops->ecp_read_data; + break; + + case IEEE1284_MODE_ECPSWE: + DPRINTK (KERN_DEBUG "%s: Using software-emulated ECP mode\n", + port->name); + fn = parport_ieee1284_ecp_read_data; + break; + + default: + DPRINTK (KERN_DEBUG "%s: Unknown mode 0x%02x\n", port->name, + port->physport->ieee1284.mode); + return -ENOSYS; + } + + return (*fn) (port, buffer, len, 0); +#endif /* IEEE1284 support */ +} + +/** + * parport_set_timeout - set the inactivity timeout for a device + * @dev: device on a port + * @inactivity: inactivity timeout (in jiffies) + * + * This sets the inactivity timeout for a particular device on a + * port. This affects functions like parport_wait_peripheral(). + * The special value 0 means not to call schedule() while dealing + * with this device. + * + * The return value is the previous inactivity timeout. + * + * Any callers of parport_wait_event() for this device are woken + * up. + */ + +long parport_set_timeout (struct pardevice *dev, long inactivity) +{ + long int old = dev->timeout; + + dev->timeout = inactivity; + + if (dev->port->physport->cad == dev) + parport_ieee1284_wakeup (dev->port); + + return old; +} + +/* Exported symbols for modules. */ + +EXPORT_SYMBOL(parport_negotiate); +EXPORT_SYMBOL(parport_write); +EXPORT_SYMBOL(parport_read); +EXPORT_SYMBOL(parport_wait_peripheral); +EXPORT_SYMBOL(parport_wait_event); +EXPORT_SYMBOL(parport_set_timeout); +EXPORT_SYMBOL(parport_ieee1284_interrupt); diff --git a/drivers/parport/ieee1284_ops.c b/drivers/parport/ieee1284_ops.c new file mode 100644 index 000000000..75daa16f3 --- /dev/null +++ b/drivers/parport/ieee1284_ops.c @@ -0,0 +1,915 @@ +// SPDX-License-Identifier: GPL-2.0 +/* IEEE-1284 operations for parport. + * + * This file is for generic IEEE 1284 operations. The idea is that + * they are used by the low-level drivers. If they have a special way + * of doing something, they can provide their own routines (and put + * the function pointers in port->ops); if not, they can just use these + * as a fallback. + * + * Note: Make no assumptions about hardware or architecture in this file! + * + * Author: Tim Waugh <tim@cyberelk.demon.co.uk> + * Fixed AUTOFD polarity in ecp_forward_to_reverse(). Fred Barnes, 1999 + * Software emulated EPP fixes, Fred Barnes, 04/2001. + */ + + +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/delay.h> +#include <linux/sched/signal.h> +#include <linux/uaccess.h> + +#undef DEBUG /* undef me for production */ + +#ifdef CONFIG_LP_CONSOLE +#undef DEBUG /* Don't want a garbled console */ +#endif + +#ifdef DEBUG +#define DPRINTK(stuff...) printk (stuff) +#else +#define DPRINTK(stuff...) +#endif + +/*** * + * One-way data transfer functions. * + * ***/ + +/* Compatibility mode. */ +size_t parport_ieee1284_write_compat (struct parport *port, + const void *buffer, size_t len, + int flags) +{ + int no_irq = 1; + ssize_t count = 0; + const unsigned char *addr = buffer; + unsigned char byte; + struct pardevice *dev = port->physport->cad; + unsigned char ctl = (PARPORT_CONTROL_SELECT + | PARPORT_CONTROL_INIT); + + if (port->irq != PARPORT_IRQ_NONE) { + parport_enable_irq (port); + no_irq = 0; + } + + port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA; + parport_write_control (port, ctl); + parport_data_forward (port); + while (count < len) { + unsigned long expire = jiffies + dev->timeout; + long wait = msecs_to_jiffies(10); + unsigned char mask = (PARPORT_STATUS_ERROR + | PARPORT_STATUS_BUSY); + unsigned char val = (PARPORT_STATUS_ERROR + | PARPORT_STATUS_BUSY); + + /* Wait until the peripheral's ready */ + do { + /* Is the peripheral ready yet? */ + if (!parport_wait_peripheral (port, mask, val)) + /* Skip the loop */ + goto ready; + + /* Is the peripheral upset? */ + if ((parport_read_status (port) & + (PARPORT_STATUS_PAPEROUT | + PARPORT_STATUS_SELECT | + PARPORT_STATUS_ERROR)) + != (PARPORT_STATUS_SELECT | + PARPORT_STATUS_ERROR)) + /* If nFault is asserted (i.e. no + * error) and PAPEROUT and SELECT are + * just red herrings, give the driver + * a chance to check it's happy with + * that before continuing. */ + goto stop; + + /* Have we run out of time? */ + if (!time_before (jiffies, expire)) + break; + + /* Yield the port for a while. If this is the + first time around the loop, don't let go of + the port. This way, we find out if we have + our interrupt handler called. */ + if (count && no_irq) { + parport_release (dev); + schedule_timeout_interruptible(wait); + parport_claim_or_block (dev); + } + else + /* We must have the device claimed here */ + parport_wait_event (port, wait); + + /* Is there a signal pending? */ + if (signal_pending (current)) + break; + + /* Wait longer next time. */ + wait *= 2; + } while (time_before (jiffies, expire)); + + if (signal_pending (current)) + break; + + DPRINTK (KERN_DEBUG "%s: Timed out\n", port->name); + break; + + ready: + /* Write the character to the data lines. */ + byte = *addr++; + parport_write_data (port, byte); + udelay (1); + + /* Pulse strobe. */ + parport_write_control (port, ctl | PARPORT_CONTROL_STROBE); + udelay (1); /* strobe */ + + parport_write_control (port, ctl); + udelay (1); /* hold */ + + /* Assume the peripheral received it. */ + count++; + + /* Let another process run if it needs to. */ + if (time_before (jiffies, expire)) + if (!parport_yield_blocking (dev) + && need_resched()) + schedule (); + } + stop: + port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return count; +} + +/* Nibble mode. */ +size_t parport_ieee1284_read_nibble (struct parport *port, + void *buffer, size_t len, + int flags) +{ +#ifndef CONFIG_PARPORT_1284 + return 0; +#else + unsigned char *buf = buffer; + int i; + unsigned char byte = 0; + + len *= 2; /* in nibbles */ + for (i=0; i < len; i++) { + unsigned char nibble; + + /* Does the error line indicate end of data? */ + if (((i & 1) == 0) && + (parport_read_status(port) & PARPORT_STATUS_ERROR)) { + goto end_of_data; + } + + /* Event 7: Set nAutoFd low. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 9: nAck goes low. */ + port->ieee1284.phase = IEEE1284_PH_REV_DATA; + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, 0)) { + /* Timeout -- no more data? */ + DPRINTK (KERN_DEBUG + "%s: Nibble timeout at event 9 (%d bytes)\n", + port->name, i/2); + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + break; + } + + + /* Read a nibble. */ + nibble = parport_read_status (port) >> 3; + nibble &= ~8; + if ((nibble & 0x10) == 0) + nibble |= 8; + nibble &= 0xf; + + /* Event 10: Set nAutoFd high. */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 11: nAck goes high. */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* Timeout -- no more data? */ + DPRINTK (KERN_DEBUG + "%s: Nibble timeout at event 11\n", + port->name); + break; + } + + if (i & 1) { + /* Second nibble */ + byte |= nibble << 4; + *buf++ = byte; + } else + byte = nibble; + } + + if (i == len) { + /* Read the last nibble without checking data avail. */ + if (parport_read_status (port) & PARPORT_STATUS_ERROR) { + end_of_data: + DPRINTK (KERN_DEBUG + "%s: No more nibble data (%d bytes)\n", + port->name, i/2); + + /* Go to reverse idle phase. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; + } + else + port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; + } + + return i/2; +#endif /* IEEE1284 support */ +} + +/* Byte mode. */ +size_t parport_ieee1284_read_byte (struct parport *port, + void *buffer, size_t len, + int flags) +{ +#ifndef CONFIG_PARPORT_1284 + return 0; +#else + unsigned char *buf = buffer; + ssize_t count = 0; + + for (count = 0; count < len; count++) { + unsigned char byte; + + /* Data available? */ + if (parport_read_status (port) & PARPORT_STATUS_ERROR) { + goto end_of_data; + } + + /* Event 14: Place data bus in high impedance state. */ + parport_data_reverse (port); + + /* Event 7: Set nAutoFd low. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 9: nAck goes low. */ + port->physport->ieee1284.phase = IEEE1284_PH_REV_DATA; + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + 0)) { + /* Timeout -- no more data? */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, + 0); + DPRINTK (KERN_DEBUG "%s: Byte timeout at event 9\n", + port->name); + break; + } + + byte = parport_read_data (port); + *buf++ = byte; + + /* Event 10: Set nAutoFd high */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 11: nAck goes high. */ + if (parport_wait_peripheral (port, + PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* Timeout -- no more data? */ + DPRINTK (KERN_DEBUG "%s: Byte timeout at event 11\n", + port->name); + break; + } + + /* Event 16: Set nStrobe low. */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + udelay (5); + + /* Event 17: Set nStrobe high. */ + parport_frob_control (port, PARPORT_CONTROL_STROBE, 0); + } + + if (count == len) { + /* Read the last byte without checking data avail. */ + if (parport_read_status (port) & PARPORT_STATUS_ERROR) { + end_of_data: + DPRINTK (KERN_DEBUG + "%s: No more byte data (%zd bytes)\n", + port->name, count); + + /* Go to reverse idle phase. */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + port->physport->ieee1284.phase = IEEE1284_PH_REV_IDLE; + } + else + port->physport->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL; + } + + return count; +#endif /* IEEE1284 support */ +} + +/*** * + * ECP Functions. * + * ***/ + +#ifdef CONFIG_PARPORT_1284 + +static inline +int ecp_forward_to_reverse (struct parport *port) +{ + int retval; + + /* Event 38: Set nAutoFd low */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + parport_data_reverse (port); + udelay (5); + + /* Event 39: Set nInit low to initiate bus reversal */ + parport_frob_control (port, + PARPORT_CONTROL_INIT, + 0); + + /* Event 40: PError goes low */ + retval = parport_wait_peripheral (port, + PARPORT_STATUS_PAPEROUT, 0); + + if (!retval) { + DPRINTK (KERN_DEBUG "%s: ECP direction: reverse\n", + port->name); + port->ieee1284.phase = IEEE1284_PH_REV_IDLE; + } else { + DPRINTK (KERN_DEBUG "%s: ECP direction: failed to reverse\n", + port->name); + port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN; + } + + return retval; +} + +static inline +int ecp_reverse_to_forward (struct parport *port) +{ + int retval; + + /* Event 47: Set nInit high */ + parport_frob_control (port, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD); + + /* Event 49: PError goes high */ + retval = parport_wait_peripheral (port, + PARPORT_STATUS_PAPEROUT, + PARPORT_STATUS_PAPEROUT); + + if (!retval) { + parport_data_forward (port); + DPRINTK (KERN_DEBUG "%s: ECP direction: forward\n", + port->name); + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + } else { + DPRINTK (KERN_DEBUG + "%s: ECP direction: failed to switch forward\n", + port->name); + port->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN; + } + + + return retval; +} + +#endif /* IEEE1284 support */ + +/* ECP mode, forward channel, data. */ +size_t parport_ieee1284_ecp_write_data (struct parport *port, + const void *buffer, size_t len, + int flags) +{ +#ifndef CONFIG_PARPORT_1284 + return 0; +#else + const unsigned char *buf = buffer; + size_t written; + int retry; + + port = port->physport; + + if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE) + if (ecp_reverse_to_forward (port)) + return 0; + + port->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* HostAck high (data, not command) */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD + | PARPORT_CONTROL_STROBE + | PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + for (written = 0; written < len; written++, buf++) { + unsigned long expire = jiffies + port->cad->timeout; + unsigned char byte; + + byte = *buf; + try_again: + parport_write_data (port, byte); + parport_frob_control (port, PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + udelay (5); + for (retry = 0; retry < 100; retry++) { + if (!parport_wait_peripheral (port, + PARPORT_STATUS_BUSY, 0)) + goto success; + + if (signal_pending (current)) { + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + 0); + break; + } + } + + /* Time for Host Transfer Recovery (page 41 of IEEE1284) */ + DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name); + + parport_frob_control (port, PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + udelay (50); + if (parport_read_status (port) & PARPORT_STATUS_PAPEROUT) { + /* It's buggered. */ + parport_frob_control (port, PARPORT_CONTROL_INIT, 0); + break; + } + + parport_frob_control (port, PARPORT_CONTROL_INIT, 0); + udelay (50); + if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT)) + break; + + DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n", + port->name); + + if (time_after_eq (jiffies, expire)) break; + goto try_again; + success: + parport_frob_control (port, PARPORT_CONTROL_STROBE, 0); + udelay (5); + if (parport_wait_peripheral (port, + PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY)) + /* Peripheral hasn't accepted the data. */ + break; + } + + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +#endif /* IEEE1284 support */ +} + +/* ECP mode, reverse channel, data. */ +size_t parport_ieee1284_ecp_read_data (struct parport *port, + void *buffer, size_t len, int flags) +{ +#ifndef CONFIG_PARPORT_1284 + return 0; +#else + struct pardevice *dev = port->cad; + unsigned char *buf = buffer; + int rle_count = 0; /* shut gcc up */ + unsigned char ctl; + int rle = 0; + ssize_t count = 0; + + port = port->physport; + + if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) + if (ecp_forward_to_reverse (port)) + return 0; + + port->ieee1284.phase = IEEE1284_PH_REV_DATA; + + /* Set HostAck low to start accepting data. */ + ctl = parport_read_control (port); + ctl &= ~(PARPORT_CONTROL_STROBE | PARPORT_CONTROL_INIT | + PARPORT_CONTROL_AUTOFD); + parport_write_control (port, + ctl | PARPORT_CONTROL_AUTOFD); + while (count < len) { + unsigned long expire = jiffies + dev->timeout; + unsigned char byte; + int command; + + /* Event 43: Peripheral sets nAck low. It can take as + long as it wants. */ + while (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) { + /* The peripheral hasn't given us data in + 35ms. If we have data to give back to the + caller, do it now. */ + if (count) + goto out; + + /* If we've used up all the time we were allowed, + give up altogether. */ + if (!time_before (jiffies, expire)) + goto out; + + /* Yield the port for a while. */ + if (dev->port->irq != PARPORT_IRQ_NONE) { + parport_release (dev); + schedule_timeout_interruptible(msecs_to_jiffies(40)); + parport_claim_or_block (dev); + } + else + /* We must have the device claimed here. */ + parport_wait_event (port, msecs_to_jiffies(40)); + + /* Is there a signal pending? */ + if (signal_pending (current)) + goto out; + } + + /* Is this a command? */ + if (rle) + /* The last byte was a run-length count, so + this can't be as well. */ + command = 0; + else + command = (parport_read_status (port) & + PARPORT_STATUS_BUSY) ? 1 : 0; + + /* Read the data. */ + byte = parport_read_data (port); + + /* If this is a channel command, rather than an RLE + command or a normal data byte, don't accept it. */ + if (command) { + if (byte & 0x80) { + DPRINTK (KERN_DEBUG "%s: stopping short at " + "channel command (%02x)\n", + port->name, byte); + goto out; + } + else if (port->ieee1284.mode != IEEE1284_MODE_ECPRLE) + DPRINTK (KERN_DEBUG "%s: device illegally " + "using RLE; accepting anyway\n", + port->name); + + rle_count = byte + 1; + + /* Are we allowed to read that many bytes? */ + if (rle_count > (len - count)) { + DPRINTK (KERN_DEBUG "%s: leaving %d RLE bytes " + "for next time\n", port->name, + rle_count); + break; + } + + rle = 1; + } + + /* Event 44: Set HostAck high, acknowledging handshake. */ + parport_write_control (port, ctl); + + /* Event 45: The peripheral has 35ms to set nAck high. */ + if (parport_wait_peripheral (port, PARPORT_STATUS_ACK, + PARPORT_STATUS_ACK)) { + /* It's gone wrong. Return what data we have + to the caller. */ + DPRINTK (KERN_DEBUG "ECP read timed out at 45\n"); + + if (command) + printk (KERN_WARNING + "%s: command ignored (%02x)\n", + port->name, byte); + + break; + } + + /* Event 46: Set HostAck low and accept the data. */ + parport_write_control (port, + ctl | PARPORT_CONTROL_AUTOFD); + + /* If we just read a run-length count, fetch the data. */ + if (command) + continue; + + /* If this is the byte after a run-length count, decompress. */ + if (rle) { + rle = 0; + memset (buf, byte, rle_count); + buf += rle_count; + count += rle_count; + DPRINTK (KERN_DEBUG "%s: decompressed to %d bytes\n", + port->name, rle_count); + } else { + /* Normal data byte. */ + *buf = byte; + buf++, count++; + } + } + + out: + port->ieee1284.phase = IEEE1284_PH_REV_IDLE; + return count; +#endif /* IEEE1284 support */ +} + +/* ECP mode, forward channel, commands. */ +size_t parport_ieee1284_ecp_write_addr (struct parport *port, + const void *buffer, size_t len, + int flags) +{ +#ifndef CONFIG_PARPORT_1284 + return 0; +#else + const unsigned char *buf = buffer; + size_t written; + int retry; + + port = port->physport; + + if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE) + if (ecp_reverse_to_forward (port)) + return 0; + + port->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* HostAck low (command, not data) */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD + | PARPORT_CONTROL_STROBE + | PARPORT_CONTROL_INIT, + PARPORT_CONTROL_AUTOFD + | PARPORT_CONTROL_INIT); + for (written = 0; written < len; written++, buf++) { + unsigned long expire = jiffies + port->cad->timeout; + unsigned char byte; + + byte = *buf; + try_again: + parport_write_data (port, byte); + parport_frob_control (port, PARPORT_CONTROL_STROBE, + PARPORT_CONTROL_STROBE); + udelay (5); + for (retry = 0; retry < 100; retry++) { + if (!parport_wait_peripheral (port, + PARPORT_STATUS_BUSY, 0)) + goto success; + + if (signal_pending (current)) { + parport_frob_control (port, + PARPORT_CONTROL_STROBE, + 0); + break; + } + } + + /* Time for Host Transfer Recovery (page 41 of IEEE1284) */ + DPRINTK (KERN_DEBUG "%s: ECP transfer stalled!\n", port->name); + + parport_frob_control (port, PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + udelay (50); + if (parport_read_status (port) & PARPORT_STATUS_PAPEROUT) { + /* It's buggered. */ + parport_frob_control (port, PARPORT_CONTROL_INIT, 0); + break; + } + + parport_frob_control (port, PARPORT_CONTROL_INIT, 0); + udelay (50); + if (!(parport_read_status (port) & PARPORT_STATUS_PAPEROUT)) + break; + + DPRINTK (KERN_DEBUG "%s: Host transfer recovered\n", + port->name); + + if (time_after_eq (jiffies, expire)) break; + goto try_again; + success: + parport_frob_control (port, PARPORT_CONTROL_STROBE, 0); + udelay (5); + if (parport_wait_peripheral (port, + PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY)) + /* Peripheral hasn't accepted the data. */ + break; + } + + port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +#endif /* IEEE1284 support */ +} + +/*** * + * EPP functions. * + * ***/ + +/* EPP mode, forward channel, data. */ +size_t parport_ieee1284_epp_write_data (struct parport *port, + const void *buffer, size_t len, + int flags) +{ + unsigned char *bp = (unsigned char *) buffer; + size_t ret = 0; + + /* set EPP idle state (just to make sure) with strobe low */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_INIT, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_INIT); + port->ops->data_forward (port); + for (; len > 0; len--, bp++) { + /* Event 62: Write data and set autofd low */ + parport_write_data (port, *bp); + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + + /* Event 58: wait for busy (nWait) to go high */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, 0, 10)) + break; + + /* Event 63: set nAutoFd (nDStrb) high */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 60: wait for busy (nWait) to go low */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY, 5)) + break; + + ret++; + } + + /* Event 61: set strobe (nWrite) high */ + parport_frob_control (port, PARPORT_CONTROL_STROBE, 0); + + return ret; +} + +/* EPP mode, reverse channel, data. */ +size_t parport_ieee1284_epp_read_data (struct parport *port, + void *buffer, size_t len, + int flags) +{ + unsigned char *bp = (unsigned char *) buffer; + unsigned ret = 0; + + /* set EPP idle state (just to make sure) with strobe high */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + port->ops->data_reverse (port); + for (; len > 0; len--, bp++) { + /* Event 67: set nAutoFd (nDStrb) low */ + parport_frob_control (port, + PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_AUTOFD); + /* Event 58: wait for Busy to go high */ + if (parport_wait_peripheral (port, PARPORT_STATUS_BUSY, 0)) { + break; + } + + *bp = parport_read_data (port); + + /* Event 63: set nAutoFd (nDStrb) high */ + parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0); + + /* Event 60: wait for Busy to go low */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY, 5)) { + break; + } + + ret++; + } + port->ops->data_forward (port); + + return ret; +} + +/* EPP mode, forward channel, addresses. */ +size_t parport_ieee1284_epp_write_addr (struct parport *port, + const void *buffer, size_t len, + int flags) +{ + unsigned char *bp = (unsigned char *) buffer; + size_t ret = 0; + + /* set EPP idle state (just to make sure) with strobe low */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_INIT, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_INIT); + port->ops->data_forward (port); + for (; len > 0; len--, bp++) { + /* Event 56: Write data and set nAStrb low. */ + parport_write_data (port, *bp); + parport_frob_control (port, PARPORT_CONTROL_SELECT, + PARPORT_CONTROL_SELECT); + + /* Event 58: wait for busy (nWait) to go high */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, 0, 10)) + break; + + /* Event 59: set nAStrb high */ + parport_frob_control (port, PARPORT_CONTROL_SELECT, 0); + + /* Event 60: wait for busy (nWait) to go low */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY, 5)) + break; + + ret++; + } + + /* Event 61: set strobe (nWrite) high */ + parport_frob_control (port, PARPORT_CONTROL_STROBE, 0); + + return ret; +} + +/* EPP mode, reverse channel, addresses. */ +size_t parport_ieee1284_epp_read_addr (struct parport *port, + void *buffer, size_t len, + int flags) +{ + unsigned char *bp = (unsigned char *) buffer; + unsigned ret = 0; + + /* Set EPP idle state (just to make sure) with strobe high */ + parport_frob_control (port, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + port->ops->data_reverse (port); + for (; len > 0; len--, bp++) { + /* Event 64: set nSelectIn (nAStrb) low */ + parport_frob_control (port, PARPORT_CONTROL_SELECT, + PARPORT_CONTROL_SELECT); + + /* Event 58: wait for Busy to go high */ + if (parport_wait_peripheral (port, PARPORT_STATUS_BUSY, 0)) { + break; + } + + *bp = parport_read_data (port); + + /* Event 59: set nSelectIn (nAStrb) high */ + parport_frob_control (port, PARPORT_CONTROL_SELECT, + 0); + + /* Event 60: wait for Busy to go low */ + if (parport_poll_peripheral (port, PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY, 5)) + break; + + ret++; + } + port->ops->data_forward (port); + + return ret; +} + +EXPORT_SYMBOL(parport_ieee1284_ecp_write_data); +EXPORT_SYMBOL(parport_ieee1284_ecp_read_data); +EXPORT_SYMBOL(parport_ieee1284_ecp_write_addr); +EXPORT_SYMBOL(parport_ieee1284_write_compat); +EXPORT_SYMBOL(parport_ieee1284_read_nibble); +EXPORT_SYMBOL(parport_ieee1284_read_byte); +EXPORT_SYMBOL(parport_ieee1284_epp_write_data); +EXPORT_SYMBOL(parport_ieee1284_epp_read_data); +EXPORT_SYMBOL(parport_ieee1284_epp_write_addr); +EXPORT_SYMBOL(parport_ieee1284_epp_read_addr); diff --git a/drivers/parport/multiface.h b/drivers/parport/multiface.h new file mode 100644 index 000000000..6513a44b9 --- /dev/null +++ b/drivers/parport/multiface.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _MULTIFACE_H_ +#define _MULTIFACE_H_ + +/* + * Defines for SerialMaster, Multiface Card II and Multiface Card III + * The addresses given below are offsets to the board base address + * + * 6.11.95 Joerg Dorchain (dorchain@mpi-sb.mpg.de) + * + */ + +#define PIA_REG_PADWIDTH 255 + +#define DUARTBASE 0x0000 +#define PITBASE 0x0100 +#define ROMBASE 0x0200 +#define PIABASE 0x4000 + +#endif + diff --git a/drivers/parport/parport_amiga.c b/drivers/parport/parport_amiga.c new file mode 100644 index 000000000..9c68f2aec --- /dev/null +++ b/drivers/parport/parport_amiga.c @@ -0,0 +1,251 @@ +/* Low-level parallel port routines for the Amiga built-in port + * + * Author: Joerg Dorchain <joerg@dorchain.net> + * + * This is a complete rewrite of the code, but based heaviy upon the old + * lp_intern. code. + * + * The built-in Amiga parallel port provides one port at a fixed address + * with 8 bidirectional data lines (D0 - D7) and 3 bidirectional status + * lines (BUSY, POUT, SEL), 1 output control line /STROBE (raised automatically + * in hardware when the data register is accessed), and 1 input control line + * /ACK, able to cause an interrupt, but both not directly settable by + * software. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/parport.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> + +#include <asm/setup.h> +#include <asm/amigahw.h> +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/amigaints.h> + +#undef DEBUG +#ifdef DEBUG +#define DPRINTK printk +#else +#define DPRINTK(x...) do { } while (0) +#endif + + +static void amiga_write_data(struct parport *p, unsigned char data) +{ + DPRINTK(KERN_DEBUG "write_data %c\n",data); + /* Triggers also /STROBE. This behavior cannot be changed */ + ciaa.prb = data; + mb(); +} + +static unsigned char amiga_read_data(struct parport *p) +{ + /* Triggers also /STROBE. This behavior cannot be changed */ + return ciaa.prb; +} + +static unsigned char control_amiga_to_pc(unsigned char control) +{ + return PARPORT_CONTROL_SELECT | + PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_STROBE; + /* fake value: interrupt enable, select in, no reset, + no autolf, no strobe - seems to be closest the wiring diagram */ +} + +static void amiga_write_control(struct parport *p, unsigned char control) +{ + DPRINTK(KERN_DEBUG "write_control %02x\n",control); + /* No implementation possible */ +} + +static unsigned char amiga_read_control( struct parport *p) +{ + DPRINTK(KERN_DEBUG "read_control \n"); + return control_amiga_to_pc(0); +} + +static unsigned char amiga_frob_control( struct parport *p, unsigned char mask, unsigned char val) +{ + unsigned char old; + + DPRINTK(KERN_DEBUG "frob_control mask %02x, value %02x\n",mask,val); + old = amiga_read_control(p); + amiga_write_control(p, (old & ~mask) ^ val); + return old; +} + +static unsigned char status_amiga_to_pc(unsigned char status) +{ + unsigned char ret = PARPORT_STATUS_BUSY | PARPORT_STATUS_ACK | PARPORT_STATUS_ERROR; + + if (status & 1) /* Busy */ + ret &= ~PARPORT_STATUS_BUSY; + if (status & 2) /* PaperOut */ + ret |= PARPORT_STATUS_PAPEROUT; + if (status & 4) /* Selected */ + ret |= PARPORT_STATUS_SELECT; + /* the rest is not connected or handled autonomously in hardware */ + + return ret; +} + +static unsigned char amiga_read_status(struct parport *p) +{ + unsigned char status; + + status = status_amiga_to_pc(ciab.pra & 7); + DPRINTK(KERN_DEBUG "read_status %02x\n", status); + return status; +} + +static void amiga_enable_irq(struct parport *p) +{ + enable_irq(IRQ_AMIGA_CIAA_FLG); +} + +static void amiga_disable_irq(struct parport *p) +{ + disable_irq(IRQ_AMIGA_CIAA_FLG); +} + +static void amiga_data_forward(struct parport *p) +{ + DPRINTK(KERN_DEBUG "forward\n"); + ciaa.ddrb = 0xff; /* all pins output */ + mb(); +} + +static void amiga_data_reverse(struct parport *p) +{ + DPRINTK(KERN_DEBUG "reverse\n"); + ciaa.ddrb = 0; /* all pins input */ + mb(); +} + +static void amiga_init_state(struct pardevice *dev, struct parport_state *s) +{ + s->u.amiga.data = 0; + s->u.amiga.datadir = 255; + s->u.amiga.status = 0; + s->u.amiga.statusdir = 0; +} + +static void amiga_save_state(struct parport *p, struct parport_state *s) +{ + mb(); + s->u.amiga.data = ciaa.prb; + s->u.amiga.datadir = ciaa.ddrb; + s->u.amiga.status = ciab.pra & 7; + s->u.amiga.statusdir = ciab.ddra & 7; + mb(); +} + +static void amiga_restore_state(struct parport *p, struct parport_state *s) +{ + mb(); + ciaa.prb = s->u.amiga.data; + ciaa.ddrb = s->u.amiga.datadir; + ciab.pra |= (ciab.pra & 0xf8) | s->u.amiga.status; + ciab.ddra |= (ciab.ddra & 0xf8) | s->u.amiga.statusdir; + mb(); +} + +static struct parport_operations pp_amiga_ops = { + .write_data = amiga_write_data, + .read_data = amiga_read_data, + + .write_control = amiga_write_control, + .read_control = amiga_read_control, + .frob_control = amiga_frob_control, + + .read_status = amiga_read_status, + + .enable_irq = amiga_enable_irq, + .disable_irq = amiga_disable_irq, + + .data_forward = amiga_data_forward, + .data_reverse = amiga_data_reverse, + + .init_state = amiga_init_state, + .save_state = amiga_save_state, + .restore_state = amiga_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +/* ----------- Initialisation code --------------------------------- */ + +static int __init amiga_parallel_probe(struct platform_device *pdev) +{ + struct parport *p; + int err; + + ciaa.ddrb = 0xff; + ciab.ddra &= 0xf8; + mb(); + + p = parport_register_port((unsigned long)&ciaa.prb, IRQ_AMIGA_CIAA_FLG, + PARPORT_DMA_NONE, &pp_amiga_ops); + if (!p) + return -EBUSY; + + err = request_irq(IRQ_AMIGA_CIAA_FLG, parport_irq_handler, 0, p->name, + p); + if (err) + goto out_irq; + + printk(KERN_INFO "%s: Amiga built-in port using irq\n", p->name); + /* XXX: set operating mode */ + parport_announce_port(p); + + platform_set_drvdata(pdev, p); + + return 0; + +out_irq: + parport_put_port(p); + return err; +} + +static int __exit amiga_parallel_remove(struct platform_device *pdev) +{ + struct parport *port = platform_get_drvdata(pdev); + + parport_remove_port(port); + if (port->irq != PARPORT_IRQ_NONE) + free_irq(IRQ_AMIGA_CIAA_FLG, port); + parport_put_port(port); + return 0; +} + +static struct platform_driver amiga_parallel_driver = { + .remove = __exit_p(amiga_parallel_remove), + .driver = { + .name = "amiga-parallel", + }, +}; + +module_platform_driver_probe(amiga_parallel_driver, amiga_parallel_probe); + +MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>"); +MODULE_DESCRIPTION("Parport Driver for Amiga builtin Port"); +MODULE_SUPPORTED_DEVICE("Amiga builtin Parallel Port"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:amiga-parallel"); diff --git a/drivers/parport/parport_atari.c b/drivers/parport/parport_atari.c new file mode 100644 index 000000000..9fbf6ccd5 --- /dev/null +++ b/drivers/parport/parport_atari.c @@ -0,0 +1,224 @@ +/* Low-level parallel port routines for the Atari builtin port + * + * Author: Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> + * + * Based on parport_amiga.c. + * + * The built-in Atari parallel port provides one port at a fixed address + * with 8 output data lines (D0 - D7), 1 output control line (STROBE) + * and 1 input status line (BUSY) able to cause an interrupt. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/parport.h> +#include <linux/interrupt.h> +#include <asm/setup.h> +#include <asm/atarihw.h> +#include <asm/irq.h> +#include <asm/atariints.h> + +static struct parport *this_port; + +static unsigned char +parport_atari_read_data(struct parport *p) +{ + unsigned long flags; + unsigned char data; + + local_irq_save(flags); + sound_ym.rd_data_reg_sel = 15; + data = sound_ym.rd_data_reg_sel; + local_irq_restore(flags); + return data; +} + +static void +parport_atari_write_data(struct parport *p, unsigned char data) +{ + unsigned long flags; + + local_irq_save(flags); + sound_ym.rd_data_reg_sel = 15; + sound_ym.wd_data = data; + local_irq_restore(flags); +} + +static unsigned char +parport_atari_read_control(struct parport *p) +{ + unsigned long flags; + unsigned char control = 0; + + local_irq_save(flags); + sound_ym.rd_data_reg_sel = 14; + if (!(sound_ym.rd_data_reg_sel & (1 << 5))) + control = PARPORT_CONTROL_STROBE; + local_irq_restore(flags); + return control; +} + +static void +parport_atari_write_control(struct parport *p, unsigned char control) +{ + unsigned long flags; + + local_irq_save(flags); + sound_ym.rd_data_reg_sel = 14; + if (control & PARPORT_CONTROL_STROBE) + sound_ym.wd_data = sound_ym.rd_data_reg_sel & ~(1 << 5); + else + sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); + local_irq_restore(flags); +} + +static unsigned char +parport_atari_frob_control(struct parport *p, unsigned char mask, + unsigned char val) +{ + unsigned char old = parport_atari_read_control(p); + parport_atari_write_control(p, (old & ~mask) ^ val); + return old; +} + +static unsigned char +parport_atari_read_status(struct parport *p) +{ + return ((st_mfp.par_dt_reg & 1 ? 0 : PARPORT_STATUS_BUSY) | + PARPORT_STATUS_SELECT | PARPORT_STATUS_ERROR); +} + +static void +parport_atari_init_state(struct pardevice *d, struct parport_state *s) +{ +} + +static void +parport_atari_save_state(struct parport *p, struct parport_state *s) +{ +} + +static void +parport_atari_restore_state(struct parport *p, struct parport_state *s) +{ +} + +static void +parport_atari_enable_irq(struct parport *p) +{ + enable_irq(IRQ_MFP_BUSY); +} + +static void +parport_atari_disable_irq(struct parport *p) +{ + disable_irq(IRQ_MFP_BUSY); +} + +static void +parport_atari_data_forward(struct parport *p) +{ + unsigned long flags; + + local_irq_save(flags); + /* Soundchip port B as output. */ + sound_ym.rd_data_reg_sel = 7; + sound_ym.wd_data = sound_ym.rd_data_reg_sel | 0x40; + local_irq_restore(flags); +} + +static void +parport_atari_data_reverse(struct parport *p) +{ +} + +static struct parport_operations parport_atari_ops = { + .write_data = parport_atari_write_data, + .read_data = parport_atari_read_data, + + .write_control = parport_atari_write_control, + .read_control = parport_atari_read_control, + .frob_control = parport_atari_frob_control, + + .read_status = parport_atari_read_status, + + .enable_irq = parport_atari_enable_irq, + .disable_irq = parport_atari_disable_irq, + + .data_forward = parport_atari_data_forward, + .data_reverse = parport_atari_data_reverse, + + .init_state = parport_atari_init_state, + .save_state = parport_atari_save_state, + .restore_state = parport_atari_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + + +static int __init parport_atari_init(void) +{ + struct parport *p; + unsigned long flags; + + if (MACH_IS_ATARI) { + local_irq_save(flags); + /* Soundchip port A/B as output. */ + sound_ym.rd_data_reg_sel = 7; + sound_ym.wd_data = (sound_ym.rd_data_reg_sel & 0x3f) | 0xc0; + /* STROBE high. */ + sound_ym.rd_data_reg_sel = 14; + sound_ym.wd_data = sound_ym.rd_data_reg_sel | (1 << 5); + local_irq_restore(flags); + /* MFP port I0 as input. */ + st_mfp.data_dir &= ~1; + /* MFP port I0 interrupt on high->low edge. */ + st_mfp.active_edge &= ~1; + p = parport_register_port((unsigned long)&sound_ym.wd_data, + IRQ_MFP_BUSY, PARPORT_DMA_NONE, + &parport_atari_ops); + if (!p) + return -ENODEV; + if (request_irq(IRQ_MFP_BUSY, parport_irq_handler, 0, p->name, + p)) { + parport_put_port (p); + return -ENODEV; + } + + this_port = p; + printk(KERN_INFO "%s: Atari built-in port using irq\n", p->name); + parport_announce_port (p); + + return 0; + } + return -ENODEV; +} + +static void __exit parport_atari_exit(void) +{ + parport_remove_port(this_port); + if (this_port->irq != PARPORT_IRQ_NONE) + free_irq(IRQ_MFP_BUSY, this_port); + parport_put_port(this_port); +} + +MODULE_AUTHOR("Andreas Schwab"); +MODULE_DESCRIPTION("Parport Driver for Atari builtin Port"); +MODULE_SUPPORTED_DEVICE("Atari builtin Parallel Port"); +MODULE_LICENSE("GPL"); + +module_init(parport_atari_init) +module_exit(parport_atari_exit) diff --git a/drivers/parport/parport_ax88796.c b/drivers/parport/parport_ax88796.c new file mode 100644 index 000000000..bfe97c2a8 --- /dev/null +++ b/drivers/parport/parport_ax88796.c @@ -0,0 +1,422 @@ +/* linux/drivers/parport/parport_ax88796.c + * + * (c) 2005,2006 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * +*/ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/parport.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <asm/io.h> +#include <asm/irq.h> + +#define AX_SPR_BUSY (1<<7) +#define AX_SPR_ACK (1<<6) +#define AX_SPR_PE (1<<5) +#define AX_SPR_SLCT (1<<4) +#define AX_SPR_ERR (1<<3) + +#define AX_CPR_nDOE (1<<5) +#define AX_CPR_SLCTIN (1<<3) +#define AX_CPR_nINIT (1<<2) +#define AX_CPR_ATFD (1<<1) +#define AX_CPR_STRB (1<<0) + +struct ax_drvdata { + struct parport *parport; + struct parport_state suspend; + + struct device *dev; + struct resource *io; + + unsigned char irq_enabled; + + void __iomem *base; + void __iomem *spp_data; + void __iomem *spp_spr; + void __iomem *spp_cpr; +}; + +static inline struct ax_drvdata *pp_to_drv(struct parport *p) +{ + return p->private_data; +} + +static unsigned char +parport_ax88796_read_data(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + + return readb(dd->spp_data); +} + +static void +parport_ax88796_write_data(struct parport *p, unsigned char data) +{ + struct ax_drvdata *dd = pp_to_drv(p); + + writeb(data, dd->spp_data); +} + +static unsigned char +parport_ax88796_read_control(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned int cpr = readb(dd->spp_cpr); + unsigned int ret = 0; + + if (!(cpr & AX_CPR_STRB)) + ret |= PARPORT_CONTROL_STROBE; + + if (!(cpr & AX_CPR_ATFD)) + ret |= PARPORT_CONTROL_AUTOFD; + + if (cpr & AX_CPR_nINIT) + ret |= PARPORT_CONTROL_INIT; + + if (!(cpr & AX_CPR_SLCTIN)) + ret |= PARPORT_CONTROL_SELECT; + + return ret; +} + +static void +parport_ax88796_write_control(struct parport *p, unsigned char control) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned int cpr = readb(dd->spp_cpr); + + cpr &= AX_CPR_nDOE; + + if (!(control & PARPORT_CONTROL_STROBE)) + cpr |= AX_CPR_STRB; + + if (!(control & PARPORT_CONTROL_AUTOFD)) + cpr |= AX_CPR_ATFD; + + if (control & PARPORT_CONTROL_INIT) + cpr |= AX_CPR_nINIT; + + if (!(control & PARPORT_CONTROL_SELECT)) + cpr |= AX_CPR_SLCTIN; + + dev_dbg(dd->dev, "write_control: ctrl=%02x, cpr=%02x\n", control, cpr); + writeb(cpr, dd->spp_cpr); + + if (parport_ax88796_read_control(p) != control) { + dev_err(dd->dev, "write_control: read != set (%02x, %02x)\n", + parport_ax88796_read_control(p), control); + } +} + +static unsigned char +parport_ax88796_read_status(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned int status = readb(dd->spp_spr); + unsigned int ret = 0; + + if (status & AX_SPR_BUSY) + ret |= PARPORT_STATUS_BUSY; + + if (status & AX_SPR_ACK) + ret |= PARPORT_STATUS_ACK; + + if (status & AX_SPR_ERR) + ret |= PARPORT_STATUS_ERROR; + + if (status & AX_SPR_SLCT) + ret |= PARPORT_STATUS_SELECT; + + if (status & AX_SPR_PE) + ret |= PARPORT_STATUS_PAPEROUT; + + return ret; +} + +static unsigned char +parport_ax88796_frob_control(struct parport *p, unsigned char mask, + unsigned char val) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned char old = parport_ax88796_read_control(p); + + dev_dbg(dd->dev, "frob: mask=%02x, val=%02x, old=%02x\n", + mask, val, old); + + parport_ax88796_write_control(p, (old & ~mask) | val); + return old; +} + +static void +parport_ax88796_enable_irq(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned long flags; + + local_irq_save(flags); + if (!dd->irq_enabled) { + enable_irq(p->irq); + dd->irq_enabled = 1; + } + local_irq_restore(flags); +} + +static void +parport_ax88796_disable_irq(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + unsigned long flags; + + local_irq_save(flags); + if (dd->irq_enabled) { + disable_irq(p->irq); + dd->irq_enabled = 0; + } + local_irq_restore(flags); +} + +static void +parport_ax88796_data_forward(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + void __iomem *cpr = dd->spp_cpr; + + writeb((readb(cpr) & ~AX_CPR_nDOE), cpr); +} + +static void +parport_ax88796_data_reverse(struct parport *p) +{ + struct ax_drvdata *dd = pp_to_drv(p); + void __iomem *cpr = dd->spp_cpr; + + writeb(readb(cpr) | AX_CPR_nDOE, cpr); +} + +static void +parport_ax88796_init_state(struct pardevice *d, struct parport_state *s) +{ + struct ax_drvdata *dd = pp_to_drv(d->port); + + memset(s, 0, sizeof(struct parport_state)); + + dev_dbg(dd->dev, "init_state: %p: state=%p\n", d, s); + s->u.ax88796.cpr = readb(dd->spp_cpr); +} + +static void +parport_ax88796_save_state(struct parport *p, struct parport_state *s) +{ + struct ax_drvdata *dd = pp_to_drv(p); + + dev_dbg(dd->dev, "save_state: %p: state=%p\n", p, s); + s->u.ax88796.cpr = readb(dd->spp_cpr); +} + +static void +parport_ax88796_restore_state(struct parport *p, struct parport_state *s) +{ + struct ax_drvdata *dd = pp_to_drv(p); + + dev_dbg(dd->dev, "restore_state: %p: state=%p\n", p, s); + writeb(s->u.ax88796.cpr, dd->spp_cpr); +} + +static struct parport_operations parport_ax88796_ops = { + .write_data = parport_ax88796_write_data, + .read_data = parport_ax88796_read_data, + + .write_control = parport_ax88796_write_control, + .read_control = parport_ax88796_read_control, + .frob_control = parport_ax88796_frob_control, + + .read_status = parport_ax88796_read_status, + + .enable_irq = parport_ax88796_enable_irq, + .disable_irq = parport_ax88796_disable_irq, + + .data_forward = parport_ax88796_data_forward, + .data_reverse = parport_ax88796_data_reverse, + + .init_state = parport_ax88796_init_state, + .save_state = parport_ax88796_save_state, + .restore_state = parport_ax88796_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +static int parport_ax88796_probe(struct platform_device *pdev) +{ + struct device *_dev = &pdev->dev; + struct ax_drvdata *dd; + struct parport *pp; + struct resource *res; + unsigned long size; + int spacing; + int irq; + int ret; + + dd = kzalloc(sizeof(*dd), GFP_KERNEL); + if (!dd) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(_dev, "no MEM specified\n"); + ret = -ENXIO; + goto exit_mem; + } + + size = resource_size(res); + spacing = size / 3; + + dd->io = request_mem_region(res->start, size, pdev->name); + if (dd->io == NULL) { + dev_err(_dev, "cannot reserve memory\n"); + ret = -ENXIO; + goto exit_mem; + } + + dd->base = ioremap(res->start, size); + if (dd->base == NULL) { + dev_err(_dev, "cannot ioremap region\n"); + ret = -ENXIO; + goto exit_res; + } + + irq = platform_get_irq(pdev, 0); + if (irq <= 0) + irq = PARPORT_IRQ_NONE; + + pp = parport_register_port((unsigned long)dd->base, irq, + PARPORT_DMA_NONE, + &parport_ax88796_ops); + + if (pp == NULL) { + dev_err(_dev, "failed to register parallel port\n"); + ret = -ENOMEM; + goto exit_unmap; + } + + pp->private_data = dd; + dd->parport = pp; + dd->dev = _dev; + + dd->spp_data = dd->base; + dd->spp_spr = dd->base + (spacing * 1); + dd->spp_cpr = dd->base + (spacing * 2); + + /* initialise the port controls */ + writeb(AX_CPR_STRB, dd->spp_cpr); + + if (irq >= 0) { + /* request irq */ + ret = request_irq(irq, parport_irq_handler, + IRQF_TRIGGER_FALLING, pdev->name, pp); + + if (ret < 0) + goto exit_port; + + dd->irq_enabled = 1; + } + + platform_set_drvdata(pdev, pp); + + dev_info(_dev, "attached parallel port driver\n"); + parport_announce_port(pp); + + return 0; + + exit_port: + parport_remove_port(pp); + exit_unmap: + iounmap(dd->base); + exit_res: + release_mem_region(dd->io->start, size); + exit_mem: + kfree(dd); + return ret; +} + +static int parport_ax88796_remove(struct platform_device *pdev) +{ + struct parport *p = platform_get_drvdata(pdev); + struct ax_drvdata *dd = pp_to_drv(p); + + free_irq(p->irq, p); + parport_remove_port(p); + iounmap(dd->base); + release_mem_region(dd->io->start, resource_size(dd->io)); + kfree(dd); + + return 0; +} + +#ifdef CONFIG_PM + +static int parport_ax88796_suspend(struct platform_device *dev, + pm_message_t state) +{ + struct parport *p = platform_get_drvdata(dev); + struct ax_drvdata *dd = pp_to_drv(p); + + parport_ax88796_save_state(p, &dd->suspend); + writeb(AX_CPR_nDOE | AX_CPR_STRB, dd->spp_cpr); + return 0; +} + +static int parport_ax88796_resume(struct platform_device *dev) +{ + struct parport *p = platform_get_drvdata(dev); + struct ax_drvdata *dd = pp_to_drv(p); + + parport_ax88796_restore_state(p, &dd->suspend); + return 0; +} + +#else +#define parport_ax88796_suspend NULL +#define parport_ax88796_resume NULL +#endif + +MODULE_ALIAS("platform:ax88796-pp"); + +static struct platform_driver axdrv = { + .driver = { + .name = "ax88796-pp", + }, + .probe = parport_ax88796_probe, + .remove = parport_ax88796_remove, + .suspend = parport_ax88796_suspend, + .resume = parport_ax88796_resume, +}; + +module_platform_driver(axdrv); + +MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); +MODULE_DESCRIPTION("AX88796 Parport parallel port driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/parport/parport_cs.c b/drivers/parport/parport_cs.c new file mode 100644 index 000000000..e9b52e4a4 --- /dev/null +++ b/drivers/parport/parport_cs.c @@ -0,0 +1,196 @@ +/*====================================================================== + + A driver for PCMCIA parallel port adapters + + (specifically, for the Quatech SPP-100 EPP card: other cards will + probably require driver tweaks) + + parport_cs.c 1.29 2002/10/11 06:57:41 + + 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/kernel.h> +#include <linux/module.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/major.h> +#include <linux/interrupt.h> + +#include <linux/parport.h> +#include <linux/parport_pc.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> +#include <pcmcia/cisreg.h> +#include <pcmcia/ciscode.h> + +/*====================================================================*/ + +/* Module parameters */ + +MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); +MODULE_DESCRIPTION("PCMCIA parallel port card driver"); +MODULE_LICENSE("Dual MPL/GPL"); + +#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) + +INT_MODULE_PARM(epp_mode, 1); + + +/*====================================================================*/ + +#define FORCE_EPP_MODE 0x08 + +typedef struct parport_info_t { + struct pcmcia_device *p_dev; + int ndev; + struct parport *port; +} parport_info_t; + +static void parport_detach(struct pcmcia_device *p_dev); +static int parport_config(struct pcmcia_device *link); +static void parport_cs_release(struct pcmcia_device *); + +static int parport_probe(struct pcmcia_device *link) +{ + parport_info_t *info; + + dev_dbg(&link->dev, "parport_attach()\n"); + + /* Create new parport device */ + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) return -ENOMEM; + link->priv = info; + info->p_dev = link; + + link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; + + return parport_config(link); +} /* parport_attach */ + +static void parport_detach(struct pcmcia_device *link) +{ + dev_dbg(&link->dev, "parport_detach\n"); + + parport_cs_release(link); + + kfree(link->priv); +} /* parport_detach */ + +static int parport_config_check(struct pcmcia_device *p_dev, void *priv_data) +{ + p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; + p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; + p_dev->resource[1]->flags &= ~IO_DATA_PATH_WIDTH; + p_dev->resource[1]->flags |= IO_DATA_PATH_WIDTH_8; + + return pcmcia_request_io(p_dev); +} + +static int parport_config(struct pcmcia_device *link) +{ + parport_info_t *info = link->priv; + struct parport *p; + int ret; + + dev_dbg(&link->dev, "parport_config\n"); + + if (epp_mode) + link->config_index |= FORCE_EPP_MODE; + + ret = pcmcia_loop_config(link, parport_config_check, NULL); + if (ret) + goto failed; + + if (!link->irq) + goto failed; + ret = pcmcia_enable_device(link); + if (ret) + goto failed; + + p = parport_pc_probe_port(link->resource[0]->start, + link->resource[1]->start, + link->irq, PARPORT_DMA_NONE, + &link->dev, IRQF_SHARED); + if (p == NULL) { + printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at " + "0x%3x, irq %u failed\n", + (unsigned int) link->resource[0]->start, + link->irq); + goto failed; + } + + p->modes |= PARPORT_MODE_PCSPP; + if (epp_mode) + p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP; + info->ndev = 1; + info->port = p; + + return 0; + +failed: + parport_cs_release(link); + return -ENODEV; +} /* parport_config */ + +static void parport_cs_release(struct pcmcia_device *link) +{ + parport_info_t *info = link->priv; + + dev_dbg(&link->dev, "parport_release\n"); + + if (info->ndev) { + struct parport *p = info->port; + parport_pc_unregister_port(p); + } + info->ndev = 0; + + pcmcia_disable_device(link); +} /* parport_cs_release */ + + +static const struct pcmcia_device_id parport_ids[] = { + PCMCIA_DEVICE_FUNC_ID(3), + PCMCIA_MFC_DEVICE_PROD_ID12(1,"Elan","Serial+Parallel Port: SP230",0x3beb8cf2,0xdb9e58bc), + PCMCIA_DEVICE_MANF_CARD(0x0137, 0x0003), + PCMCIA_DEVICE_NULL +}; +MODULE_DEVICE_TABLE(pcmcia, parport_ids); + +static struct pcmcia_driver parport_cs_driver = { + .owner = THIS_MODULE, + .name = "parport_cs", + .probe = parport_probe, + .remove = parport_detach, + .id_table = parport_ids, +}; +module_pcmcia_driver(parport_cs_driver); diff --git a/drivers/parport/parport_gsc.c b/drivers/parport/parport_gsc.c new file mode 100644 index 000000000..190c0a7a1 --- /dev/null +++ b/drivers/parport/parport_gsc.c @@ -0,0 +1,431 @@ +/* + * Low-level parallel-support for PC-style hardware integrated in the + * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations + * + * 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. + * + * (C) 1999-2001 by Helge Deller <deller@gmx.de> + * + * + * based on parport_pc.c by + * Grant Guenther <grant@torque.net> + * Phil Blundell <philb@gnu.org> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * David Campbell + * Andrea Arcangeli + */ + +#undef DEBUG /* undef for production */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/pci.h> +#include <linux/sysctl.h> + +#include <asm/io.h> +#include <asm/dma.h> +#include <linux/uaccess.h> +#include <asm/superio.h> + +#include <linux/parport.h> +#include <asm/pdc.h> +#include <asm/parisc-device.h> +#include <asm/hardware.h> +#include "parport_gsc.h" + + +MODULE_AUTHOR("Helge Deller <deller@gmx.de>"); +MODULE_DESCRIPTION("HP-PARISC PC-style parallel port driver"); +MODULE_SUPPORTED_DEVICE("integrated PC-style parallel port"); +MODULE_LICENSE("GPL"); + + +/* + * Clear TIMEOUT BIT in EPP MODE + * + * This is also used in SPP detection. + */ +static int clear_epp_timeout(struct parport *pb) +{ + unsigned char r; + + if (!(parport_gsc_read_status(pb) & 0x01)) + return 1; + + /* To clear timeout some chips require double read */ + parport_gsc_read_status(pb); + r = parport_gsc_read_status(pb); + parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */ + parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */ + r = parport_gsc_read_status(pb); + + return !(r & 0x01); +} + +/* + * Access functions. + * + * Most of these aren't static because they may be used by the + * parport_xxx_yyy macros. extern __inline__ versions of several + * of these are in parport_gsc.h. + */ + +void parport_gsc_init_state(struct pardevice *dev, struct parport_state *s) +{ + s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); +} + +void parport_gsc_save_state(struct parport *p, struct parport_state *s) +{ + s->u.pc.ctr = parport_readb (CONTROL (p)); +} + +void parport_gsc_restore_state(struct parport *p, struct parport_state *s) +{ + parport_writeb (s->u.pc.ctr, CONTROL (p)); +} + +struct parport_operations parport_gsc_ops = +{ + .write_data = parport_gsc_write_data, + .read_data = parport_gsc_read_data, + + .write_control = parport_gsc_write_control, + .read_control = parport_gsc_read_control, + .frob_control = parport_gsc_frob_control, + + .read_status = parport_gsc_read_status, + + .enable_irq = parport_gsc_enable_irq, + .disable_irq = parport_gsc_disable_irq, + + .data_forward = parport_gsc_data_forward, + .data_reverse = parport_gsc_data_reverse, + + .init_state = parport_gsc_init_state, + .save_state = parport_gsc_save_state, + .restore_state = parport_gsc_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +/* --- Mode detection ------------------------------------- */ + +/* + * Checks for port existence, all ports support SPP MODE + */ +static int parport_SPP_supported(struct parport *pb) +{ + unsigned char r, w; + + /* + * first clear an eventually pending EPP timeout + * I (sailer@ife.ee.ethz.ch) have an SMSC chipset + * that does not even respond to SPP cycles if an EPP + * timeout is pending + */ + clear_epp_timeout(pb); + + /* Do a simple read-write test to make sure the port exists. */ + w = 0xc; + parport_writeb (w, CONTROL (pb)); + + /* Is there a control register that we can read from? Some + * ports don't allow reads, so read_control just returns a + * software copy. Some ports _do_ allow reads, so bypass the + * software copy here. In addition, some bits aren't + * writable. */ + r = parport_readb (CONTROL (pb)); + if ((r & 0xf) == w) { + w = 0xe; + parport_writeb (w, CONTROL (pb)); + r = parport_readb (CONTROL (pb)); + parport_writeb (0xc, CONTROL (pb)); + if ((r & 0xf) == w) + return PARPORT_MODE_PCSPP; + } + + /* Try the data register. The data lines aren't tri-stated at + * this stage, so we expect back what we wrote. */ + w = 0xaa; + parport_gsc_write_data (pb, w); + r = parport_gsc_read_data (pb); + if (r == w) { + w = 0x55; + parport_gsc_write_data (pb, w); + r = parport_gsc_read_data (pb); + if (r == w) + return PARPORT_MODE_PCSPP; + } + + return 0; +} + +/* Detect PS/2 support. + * + * Bit 5 (0x20) sets the PS/2 data direction; setting this high + * allows us to read data from the data lines. In theory we would get back + * 0xff but any peripheral attached to the port may drag some or all of the + * lines down to zero. So if we get back anything that isn't the contents + * of the data register we deem PS/2 support to be present. + * + * Some SPP ports have "half PS/2" ability - you can't turn off the line + * drivers, but an external peripheral with sufficiently beefy drivers of + * its own can overpower them and assert its own levels onto the bus, from + * where they can then be read back as normal. Ports with this property + * and the right type of device attached are likely to fail the SPP test, + * (as they will appear to have stuck bits) and so the fact that they might + * be misdetected here is rather academic. + */ + +static int parport_PS2_supported(struct parport *pb) +{ + int ok = 0; + + clear_epp_timeout(pb); + + /* try to tri-state the buffer */ + parport_gsc_data_reverse (pb); + + parport_gsc_write_data(pb, 0x55); + if (parport_gsc_read_data(pb) != 0x55) ok++; + + parport_gsc_write_data(pb, 0xaa); + if (parport_gsc_read_data(pb) != 0xaa) ok++; + + /* cancel input mode */ + parport_gsc_data_forward (pb); + + if (ok) { + pb->modes |= PARPORT_MODE_TRISTATE; + } else { + struct parport_gsc_private *priv = pb->private_data; + priv->ctr_writable &= ~0x20; + } + + return ok; +} + + +/* --- Initialisation code -------------------------------- */ + +struct parport *parport_gsc_probe_port(unsigned long base, + unsigned long base_hi, int irq, + int dma, struct parisc_device *padev) +{ + struct parport_gsc_private *priv; + struct parport_operations *ops; + struct parport tmp; + struct parport *p = &tmp; + + priv = kzalloc (sizeof (struct parport_gsc_private), GFP_KERNEL); + if (!priv) { + printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base); + return NULL; + } + ops = kmemdup(&parport_gsc_ops, sizeof(struct parport_operations), + GFP_KERNEL); + if (!ops) { + printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n", + base); + kfree (priv); + return NULL; + } + priv->ctr = 0xc; + priv->ctr_writable = 0xff; + priv->dma_buf = NULL; + priv->dma_handle = 0; + p->base = base; + p->base_hi = base_hi; + p->irq = irq; + p->dma = dma; + p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT; + p->ops = ops; + p->private_data = priv; + p->physport = p; + if (!parport_SPP_supported (p)) { + /* No port. */ + kfree (priv); + kfree(ops); + return NULL; + } + parport_PS2_supported (p); + + if (!(p = parport_register_port(base, PARPORT_IRQ_NONE, + PARPORT_DMA_NONE, ops))) { + kfree (priv); + kfree (ops); + return NULL; + } + + p->dev = &padev->dev; + p->base_hi = base_hi; + p->modes = tmp.modes; + p->size = (p->modes & PARPORT_MODE_EPP)?8:3; + p->private_data = priv; + + printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base); + p->irq = irq; + if (p->irq == PARPORT_IRQ_AUTO) { + p->irq = PARPORT_IRQ_NONE; + } + if (p->irq != PARPORT_IRQ_NONE) { + pr_cont(", irq %d", p->irq); + + if (p->dma == PARPORT_DMA_AUTO) { + p->dma = PARPORT_DMA_NONE; + } + } + if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq + is mandatory (see above) */ + p->dma = PARPORT_DMA_NONE; + + pr_cont(" ["); +#define printmode(x) {if(p->modes&PARPORT_MODE_##x){pr_cont("%s%s",f?",":"",#x);f++;}} + { + int f = 0; + printmode(PCSPP); + printmode(TRISTATE); + printmode(COMPAT) + printmode(EPP); +// printmode(ECP); +// printmode(DMA); + } +#undef printmode + pr_cont("]\n"); + + if (p->irq != PARPORT_IRQ_NONE) { + if (request_irq (p->irq, parport_irq_handler, + 0, p->name, p)) { + printk (KERN_WARNING "%s: irq %d in use, " + "resorting to polled operation\n", + p->name, p->irq); + p->irq = PARPORT_IRQ_NONE; + p->dma = PARPORT_DMA_NONE; + } + } + + /* Done probing. Now put the port into a sensible start-up state. */ + + parport_gsc_write_data(p, 0); + parport_gsc_data_forward (p); + + /* Now that we've told the sharing engine about the port, and + found out its characteristics, let the high-level drivers + know about it. */ + parport_announce_port (p); + + return p; +} + + +#define PARPORT_GSC_OFFSET 0x800 + +static int parport_count; + +static int __init parport_init_chip(struct parisc_device *dev) +{ + struct parport *p; + unsigned long port; + + if (!dev->irq) { + printk(KERN_WARNING "IRQ not found for parallel device at 0x%llx\n", + (unsigned long long)dev->hpa.start); + return -ENODEV; + } + + port = dev->hpa.start + PARPORT_GSC_OFFSET; + + /* some older machines with ASP-chip don't support + * the enhanced parport modes. + */ + if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) { + + /* Initialize bidirectional-mode (0x10) & data-tranfer-mode #1 (0x20) */ + printk("%s: initialize bidirectional-mode.\n", __func__); + parport_writeb ( (0x10 + 0x20), port + 4); + + } else { + printk("%s: enhanced parport-modes not supported.\n", __func__); + } + + p = parport_gsc_probe_port(port, 0, dev->irq, + /* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, dev); + if (p) + parport_count++; + dev_set_drvdata(&dev->dev, p); + + return 0; +} + +static int __exit parport_remove_chip(struct parisc_device *dev) +{ + struct parport *p = dev_get_drvdata(&dev->dev); + if (p) { + struct parport_gsc_private *priv = p->private_data; + struct parport_operations *ops = p->ops; + parport_remove_port(p); + if (p->dma != PARPORT_DMA_NONE) + free_dma(p->dma); + if (p->irq != PARPORT_IRQ_NONE) + free_irq(p->irq, p); + if (priv->dma_buf) + pci_free_consistent(priv->dev, PAGE_SIZE, + priv->dma_buf, + priv->dma_handle); + kfree (p->private_data); + parport_put_port(p); + kfree (ops); /* hope no-one cached it */ + } + return 0; +} + +static const struct parisc_device_id parport_tbl[] __initconst = { + { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x74 }, + { 0, } +}; + +MODULE_DEVICE_TABLE(parisc, parport_tbl); + +static struct parisc_driver parport_driver __refdata = { + .name = "Parallel", + .id_table = parport_tbl, + .probe = parport_init_chip, + .remove = __exit_p(parport_remove_chip), +}; + +int parport_gsc_init(void) +{ + return register_parisc_driver(&parport_driver); +} + +static void parport_gsc_exit(void) +{ + unregister_parisc_driver(&parport_driver); +} + +module_init(parport_gsc_init); +module_exit(parport_gsc_exit); diff --git a/drivers/parport/parport_gsc.h b/drivers/parport/parport_gsc.h new file mode 100644 index 000000000..812214768 --- /dev/null +++ b/drivers/parport/parport_gsc.h @@ -0,0 +1,222 @@ +/* + * Low-level parallel-support for PC-style hardware integrated in the + * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations + * + * (C) 1999-2001 by Helge Deller <deller@gmx.de> + * + * + * 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 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. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * based on parport_pc.c by + * Grant Guenther <grant@torque.net> + * Phil Blundell <Philip.Blundell@pobox.com> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * David Campbell + * Andrea Arcangeli + */ + +#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H +#define __DRIVERS_PARPORT_PARPORT_GSC_H + +#include <asm/io.h> +#include <linux/delay.h> + +#undef DEBUG_PARPORT /* undefine for production */ +#define DELAY_TIME 0 + +#if DELAY_TIME == 0 +#define parport_readb gsc_readb +#define parport_writeb gsc_writeb +#else +static __inline__ unsigned char parport_readb( unsigned long port ) +{ + udelay(DELAY_TIME); + return gsc_readb(port); +} + +static __inline__ void parport_writeb( unsigned char value, unsigned long port ) +{ + gsc_writeb(value,port); + udelay(DELAY_TIME); +} +#endif + +/* --- register definitions ------------------------------- */ + +#define EPPDATA(p) ((p)->base + 0x4) +#define EPPADDR(p) ((p)->base + 0x3) +#define CONTROL(p) ((p)->base + 0x2) +#define STATUS(p) ((p)->base + 0x1) +#define DATA(p) ((p)->base + 0x0) + +struct parport_gsc_private { + /* Contents of CTR. */ + unsigned char ctr; + + /* Bitmask of writable CTR bits. */ + unsigned char ctr_writable; + + /* Number of bytes per portword. */ + int pword; + + /* Not used yet. */ + int readIntrThreshold; + int writeIntrThreshold; + + /* buffer suitable for DMA, if DMA enabled */ + char *dma_buf; + dma_addr_t dma_handle; + struct pci_dev *dev; +}; + +static inline void parport_gsc_write_data(struct parport *p, unsigned char d) +{ +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d); +#endif + parport_writeb(d, DATA(p)); +} + +static inline unsigned char parport_gsc_read_data(struct parport *p) +{ + unsigned char val = parport_readb (DATA (p)); +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n", + p, val); +#endif + return val; +} + +/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that + * it doesn't do any extra masking. */ +static inline unsigned char __parport_gsc_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + struct parport_gsc_private *priv = p->physport->private_data; + unsigned char ctr = priv->ctr; +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG + "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n", + mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable); +#endif + ctr = (ctr & ~mask) ^ val; + ctr &= priv->ctr_writable; /* only write writable bits. */ + parport_writeb (ctr, CONTROL (p)); + priv->ctr = ctr; /* Update soft copy */ + return ctr; +} + +static inline void parport_gsc_data_reverse(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x20, 0x20); +} + +static inline void parport_gsc_data_forward(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x20, 0x00); +} + +static inline void parport_gsc_write_control(struct parport *p, + unsigned char d) +{ + const unsigned char wm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + + /* Take this out when drivers have adapted to newer interface. */ + if (d & 0x20) { + printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n", + p->name, p->cad->name); + parport_gsc_data_reverse (p); + } + + __parport_gsc_frob_control (p, wm, d & wm); +} + +static inline unsigned char parport_gsc_read_control(struct parport *p) +{ + const unsigned char rm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + const struct parport_gsc_private *priv = p->physport->private_data; + return priv->ctr & rm; /* Use soft copy */ +} + +static inline unsigned char parport_gsc_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + const unsigned char wm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + + /* Take this out when drivers have adapted to newer interface. */ + if (mask & 0x20) { + printk (KERN_DEBUG "%s (%s): use data_%s for this!\n", + p->name, p->cad->name, + (val & 0x20) ? "reverse" : "forward"); + if (val & 0x20) + parport_gsc_data_reverse (p); + else + parport_gsc_data_forward (p); + } + + /* Restrict mask and val to control lines. */ + mask &= wm; + val &= wm; + + return __parport_gsc_frob_control (p, mask, val); +} + +static inline unsigned char parport_gsc_read_status(struct parport *p) +{ + return parport_readb (STATUS(p)); +} + +static inline void parport_gsc_disable_irq(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x10, 0x00); +} + +static inline void parport_gsc_enable_irq(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x10, 0x10); +} + +extern void parport_gsc_release_resources(struct parport *p); + +extern int parport_gsc_claim_resources(struct parport *p); + +extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s); + +extern void parport_gsc_save_state(struct parport *p, struct parport_state *s); + +extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s); + +extern void parport_gsc_inc_use_count(void); + +extern void parport_gsc_dec_use_count(void); + +extern struct parport *parport_gsc_probe_port(unsigned long base, + unsigned long base_hi, + int irq, int dma, + struct parisc_device *padev); + +#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */ diff --git a/drivers/parport/parport_ip32.c b/drivers/parport/parport_ip32.c new file mode 100644 index 000000000..62873070f --- /dev/null +++ b/drivers/parport/parport_ip32.c @@ -0,0 +1,2250 @@ +/* Low-level parallel port routines for built-in port on SGI IP32 + * + * Author: Arnaud Giersch <arnaud.giersch@free.fr> + * + * Based on parport_pc.c by + * Phil Blundell, Tim Waugh, Jose Renau, David Campbell, + * Andrea Arcangeli, et al. + * + * Thanks to Ilya A. Volynets-Evenbakh for his help. + * + * Copyright (C) 2005, 2006 Arnaud Giersch. + * + * 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 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. + * + * 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., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* Current status: + * + * Basic SPP and PS2 modes are supported. + * Support for parallel port IRQ is present. + * Hardware SPP (a.k.a. compatibility), EPP, and ECP modes are + * supported. + * SPP/ECP FIFO can be driven in PIO or DMA mode. PIO mode can work with + * or without interrupt support. + * + * Hardware ECP mode is not fully implemented (ecp_read_data and + * ecp_write_addr are actually missing). + * + * To do: + * + * Fully implement ECP mode. + * EPP and ECP mode need to be tested. I currently do not own any + * peripheral supporting these extended mode, and cannot test them. + * If DMA mode works well, decide if support for PIO FIFO modes should be + * dropped. + * Use the io{read,write} family functions when they become available in + * the linux-mips.org tree. Note: the MIPS specific functions readsb() + * and writesb() are to be translated by ioread8_rep() and iowrite8_rep() + * respectively. + */ + +/* The built-in parallel port on the SGI 02 workstation (a.k.a. IP32) is an + * IEEE 1284 parallel port driven by a Texas Instrument TL16PIR552PH chip[1]. + * This chip supports SPP, bidirectional, EPP and ECP modes. It has a 16 byte + * FIFO buffer and supports DMA transfers. + * + * [1] http://focus.ti.com/docs/prod/folders/print/tl16pir552.html + * + * Theoretically, we could simply use the parport_pc module. It is however + * not so simple. The parport_pc code assumes that the parallel port + * registers are port-mapped. On the O2, they are memory-mapped. + * Furthermore, each register is replicated on 256 consecutive addresses (as + * it is for the built-in serial ports on the same chip). + */ + +/*--- Some configuration defines ---------------------------------------*/ + +/* DEBUG_PARPORT_IP32 + * 0 disable debug + * 1 standard level: pr_debug1 is enabled + * 2 parport_ip32_dump_state is enabled + * >=3 verbose level: pr_debug is enabled + */ +#if !defined(DEBUG_PARPORT_IP32) +# define DEBUG_PARPORT_IP32 0 /* 0 (disabled) for production */ +#endif + +/*----------------------------------------------------------------------*/ + +/* Setup DEBUG macros. This is done before any includes, just in case we + * activate pr_debug() with DEBUG_PARPORT_IP32 >= 3. + */ +#if DEBUG_PARPORT_IP32 == 1 +# warning DEBUG_PARPORT_IP32 == 1 +#elif DEBUG_PARPORT_IP32 == 2 +# warning DEBUG_PARPORT_IP32 == 2 +#elif DEBUG_PARPORT_IP32 >= 3 +# warning DEBUG_PARPORT_IP32 >= 3 +# if !defined(DEBUG) +# define DEBUG /* enable pr_debug() in kernel.h */ +# endif +#endif + +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/sched/signal.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/stddef.h> +#include <linux/types.h> +#include <asm/io.h> +#include <asm/ip32/ip32_ints.h> +#include <asm/ip32/mace.h> + +/*--- Global variables -------------------------------------------------*/ + +/* Verbose probing on by default for debugging. */ +#if DEBUG_PARPORT_IP32 >= 1 +# define DEFAULT_VERBOSE_PROBING 1 +#else +# define DEFAULT_VERBOSE_PROBING 0 +#endif + +/* Default prefix for printk */ +#define PPIP32 "parport_ip32: " + +/* + * These are the module parameters: + * @features: bit mask of features to enable/disable + * (all enabled by default) + * @verbose_probing: log chit-chat during initialization + */ +#define PARPORT_IP32_ENABLE_IRQ (1U << 0) +#define PARPORT_IP32_ENABLE_DMA (1U << 1) +#define PARPORT_IP32_ENABLE_SPP (1U << 2) +#define PARPORT_IP32_ENABLE_EPP (1U << 3) +#define PARPORT_IP32_ENABLE_ECP (1U << 4) +static unsigned int features = ~0U; +static bool verbose_probing = DEFAULT_VERBOSE_PROBING; + +/* We do not support more than one port. */ +static struct parport *this_port; + +/* Timing constants for FIFO modes. */ +#define FIFO_NFAULT_TIMEOUT 100 /* milliseconds */ +#define FIFO_POLLING_INTERVAL 50 /* microseconds */ + +/*--- I/O register definitions -----------------------------------------*/ + +/** + * struct parport_ip32_regs - virtual addresses of parallel port registers + * @data: Data Register + * @dsr: Device Status Register + * @dcr: Device Control Register + * @eppAddr: EPP Address Register + * @eppData0: EPP Data Register 0 + * @eppData1: EPP Data Register 1 + * @eppData2: EPP Data Register 2 + * @eppData3: EPP Data Register 3 + * @ecpAFifo: ECP Address FIFO + * @fifo: General FIFO register. The same address is used for: + * - cFifo, the Parallel Port DATA FIFO + * - ecpDFifo, the ECP Data FIFO + * - tFifo, the ECP Test FIFO + * @cnfgA: Configuration Register A + * @cnfgB: Configuration Register B + * @ecr: Extended Control Register + */ +struct parport_ip32_regs { + void __iomem *data; + void __iomem *dsr; + void __iomem *dcr; + void __iomem *eppAddr; + void __iomem *eppData0; + void __iomem *eppData1; + void __iomem *eppData2; + void __iomem *eppData3; + void __iomem *ecpAFifo; + void __iomem *fifo; + void __iomem *cnfgA; + void __iomem *cnfgB; + void __iomem *ecr; +}; + +/* Device Status Register */ +#define DSR_nBUSY (1U << 7) /* PARPORT_STATUS_BUSY */ +#define DSR_nACK (1U << 6) /* PARPORT_STATUS_ACK */ +#define DSR_PERROR (1U << 5) /* PARPORT_STATUS_PAPEROUT */ +#define DSR_SELECT (1U << 4) /* PARPORT_STATUS_SELECT */ +#define DSR_nFAULT (1U << 3) /* PARPORT_STATUS_ERROR */ +#define DSR_nPRINT (1U << 2) /* specific to TL16PIR552 */ +/* #define DSR_reserved (1U << 1) */ +#define DSR_TIMEOUT (1U << 0) /* EPP timeout */ + +/* Device Control Register */ +/* #define DCR_reserved (1U << 7) | (1U << 6) */ +#define DCR_DIR (1U << 5) /* direction */ +#define DCR_IRQ (1U << 4) /* interrupt on nAck */ +#define DCR_SELECT (1U << 3) /* PARPORT_CONTROL_SELECT */ +#define DCR_nINIT (1U << 2) /* PARPORT_CONTROL_INIT */ +#define DCR_AUTOFD (1U << 1) /* PARPORT_CONTROL_AUTOFD */ +#define DCR_STROBE (1U << 0) /* PARPORT_CONTROL_STROBE */ + +/* ECP Configuration Register A */ +#define CNFGA_IRQ (1U << 7) +#define CNFGA_ID_MASK ((1U << 6) | (1U << 5) | (1U << 4)) +#define CNFGA_ID_SHIFT 4 +#define CNFGA_ID_16 (00U << CNFGA_ID_SHIFT) +#define CNFGA_ID_8 (01U << CNFGA_ID_SHIFT) +#define CNFGA_ID_32 (02U << CNFGA_ID_SHIFT) +/* #define CNFGA_reserved (1U << 3) */ +#define CNFGA_nBYTEINTRANS (1U << 2) +#define CNFGA_PWORDLEFT ((1U << 1) | (1U << 0)) + +/* ECP Configuration Register B */ +#define CNFGB_COMPRESS (1U << 7) +#define CNFGB_INTRVAL (1U << 6) +#define CNFGB_IRQ_MASK ((1U << 5) | (1U << 4) | (1U << 3)) +#define CNFGB_IRQ_SHIFT 3 +#define CNFGB_DMA_MASK ((1U << 2) | (1U << 1) | (1U << 0)) +#define CNFGB_DMA_SHIFT 0 + +/* Extended Control Register */ +#define ECR_MODE_MASK ((1U << 7) | (1U << 6) | (1U << 5)) +#define ECR_MODE_SHIFT 5 +#define ECR_MODE_SPP (00U << ECR_MODE_SHIFT) +#define ECR_MODE_PS2 (01U << ECR_MODE_SHIFT) +#define ECR_MODE_PPF (02U << ECR_MODE_SHIFT) +#define ECR_MODE_ECP (03U << ECR_MODE_SHIFT) +#define ECR_MODE_EPP (04U << ECR_MODE_SHIFT) +/* #define ECR_MODE_reserved (05U << ECR_MODE_SHIFT) */ +#define ECR_MODE_TST (06U << ECR_MODE_SHIFT) +#define ECR_MODE_CFG (07U << ECR_MODE_SHIFT) +#define ECR_nERRINTR (1U << 4) +#define ECR_DMAEN (1U << 3) +#define ECR_SERVINTR (1U << 2) +#define ECR_F_FULL (1U << 1) +#define ECR_F_EMPTY (1U << 0) + +/*--- Private data -----------------------------------------------------*/ + +/** + * enum parport_ip32_irq_mode - operation mode of interrupt handler + * @PARPORT_IP32_IRQ_FWD: forward interrupt to the upper parport layer + * @PARPORT_IP32_IRQ_HERE: interrupt is handled locally + */ +enum parport_ip32_irq_mode { PARPORT_IP32_IRQ_FWD, PARPORT_IP32_IRQ_HERE }; + +/** + * struct parport_ip32_private - private stuff for &struct parport + * @regs: register addresses + * @dcr_cache: cached contents of DCR + * @dcr_writable: bit mask of writable DCR bits + * @pword: number of bytes per PWord + * @fifo_depth: number of PWords that FIFO will hold + * @readIntrThreshold: minimum number of PWords we can read + * if we get an interrupt + * @writeIntrThreshold: minimum number of PWords we can write + * if we get an interrupt + * @irq_mode: operation mode of interrupt handler for this port + * @irq_complete: mutex used to wait for an interrupt to occur + */ +struct parport_ip32_private { + struct parport_ip32_regs regs; + unsigned int dcr_cache; + unsigned int dcr_writable; + unsigned int pword; + unsigned int fifo_depth; + unsigned int readIntrThreshold; + unsigned int writeIntrThreshold; + enum parport_ip32_irq_mode irq_mode; + struct completion irq_complete; +}; + +/*--- Debug code -------------------------------------------------------*/ + +/* + * pr_debug1 - print debug messages + * + * This is like pr_debug(), but is defined for %DEBUG_PARPORT_IP32 >= 1 + */ +#if DEBUG_PARPORT_IP32 >= 1 +# define pr_debug1(...) printk(KERN_DEBUG __VA_ARGS__) +#else /* DEBUG_PARPORT_IP32 < 1 */ +# define pr_debug1(...) do { } while (0) +#endif + +/* + * pr_trace, pr_trace1 - trace function calls + * @p: pointer to &struct parport + * @fmt: printk format string + * @...: parameters for format string + * + * Macros used to trace function calls. The given string is formatted after + * function name. pr_trace() uses pr_debug(), and pr_trace1() uses + * pr_debug1(). __pr_trace() is the low-level macro and is not to be used + * directly. + */ +#define __pr_trace(pr, p, fmt, ...) \ + pr("%s: %s" fmt "\n", \ + ({ const struct parport *__p = (p); \ + __p ? __p->name : "parport_ip32"; }), \ + __func__ , ##__VA_ARGS__) +#define pr_trace(p, fmt, ...) __pr_trace(pr_debug, p, fmt , ##__VA_ARGS__) +#define pr_trace1(p, fmt, ...) __pr_trace(pr_debug1, p, fmt , ##__VA_ARGS__) + +/* + * __pr_probe, pr_probe - print message if @verbose_probing is true + * @p: pointer to &struct parport + * @fmt: printk format string + * @...: parameters for format string + * + * For new lines, use pr_probe(). Use __pr_probe() for continued lines. + */ +#define __pr_probe(...) \ + do { if (verbose_probing) printk(__VA_ARGS__); } while (0) +#define pr_probe(p, fmt, ...) \ + __pr_probe(KERN_INFO PPIP32 "0x%lx: " fmt, (p)->base , ##__VA_ARGS__) + +/* + * parport_ip32_dump_state - print register status of parport + * @p: pointer to &struct parport + * @str: string to add in message + * @show_ecp_config: shall we dump ECP configuration registers too? + * + * This function is only here for debugging purpose, and should be used with + * care. Reading the parallel port registers may have undesired side effects. + * Especially if @show_ecp_config is true, the parallel port is resetted. + * This function is only defined if %DEBUG_PARPORT_IP32 >= 2. + */ +#if DEBUG_PARPORT_IP32 >= 2 +static void parport_ip32_dump_state(struct parport *p, char *str, + unsigned int show_ecp_config) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + unsigned int i; + + printk(KERN_DEBUG PPIP32 "%s: state (%s):\n", p->name, str); + { + static const char ecr_modes[8][4] = {"SPP", "PS2", "PPF", + "ECP", "EPP", "???", + "TST", "CFG"}; + unsigned int ecr = readb(priv->regs.ecr); + printk(KERN_DEBUG PPIP32 " ecr=0x%02x", ecr); + printk(" %s", + ecr_modes[(ecr & ECR_MODE_MASK) >> ECR_MODE_SHIFT]); + if (ecr & ECR_nERRINTR) + printk(",nErrIntrEn"); + if (ecr & ECR_DMAEN) + printk(",dmaEn"); + if (ecr & ECR_SERVINTR) + printk(",serviceIntr"); + if (ecr & ECR_F_FULL) + printk(",f_full"); + if (ecr & ECR_F_EMPTY) + printk(",f_empty"); + printk("\n"); + } + if (show_ecp_config) { + unsigned int oecr, cnfgA, cnfgB; + oecr = readb(priv->regs.ecr); + writeb(ECR_MODE_PS2, priv->regs.ecr); + writeb(ECR_MODE_CFG, priv->regs.ecr); + cnfgA = readb(priv->regs.cnfgA); + cnfgB = readb(priv->regs.cnfgB); + writeb(ECR_MODE_PS2, priv->regs.ecr); + writeb(oecr, priv->regs.ecr); + printk(KERN_DEBUG PPIP32 " cnfgA=0x%02x", cnfgA); + printk(" ISA-%s", (cnfgA & CNFGA_IRQ) ? "Level" : "Pulses"); + switch (cnfgA & CNFGA_ID_MASK) { + case CNFGA_ID_8: + printk(",8 bits"); + break; + case CNFGA_ID_16: + printk(",16 bits"); + break; + case CNFGA_ID_32: + printk(",32 bits"); + break; + default: + printk(",unknown ID"); + break; + } + if (!(cnfgA & CNFGA_nBYTEINTRANS)) + printk(",ByteInTrans"); + if ((cnfgA & CNFGA_ID_MASK) != CNFGA_ID_8) + printk(",%d byte%s left", cnfgA & CNFGA_PWORDLEFT, + ((cnfgA & CNFGA_PWORDLEFT) > 1) ? "s" : ""); + printk("\n"); + printk(KERN_DEBUG PPIP32 " cnfgB=0x%02x", cnfgB); + printk(" irq=%u,dma=%u", + (cnfgB & CNFGB_IRQ_MASK) >> CNFGB_IRQ_SHIFT, + (cnfgB & CNFGB_DMA_MASK) >> CNFGB_DMA_SHIFT); + printk(",intrValue=%d", !!(cnfgB & CNFGB_INTRVAL)); + if (cnfgB & CNFGB_COMPRESS) + printk(",compress"); + printk("\n"); + } + for (i = 0; i < 2; i++) { + unsigned int dcr = i ? priv->dcr_cache : readb(priv->regs.dcr); + printk(KERN_DEBUG PPIP32 " dcr(%s)=0x%02x", + i ? "soft" : "hard", dcr); + printk(" %s", (dcr & DCR_DIR) ? "rev" : "fwd"); + if (dcr & DCR_IRQ) + printk(",ackIntEn"); + if (!(dcr & DCR_SELECT)) + printk(",nSelectIn"); + if (dcr & DCR_nINIT) + printk(",nInit"); + if (!(dcr & DCR_AUTOFD)) + printk(",nAutoFD"); + if (!(dcr & DCR_STROBE)) + printk(",nStrobe"); + printk("\n"); + } +#define sep (f++ ? ',' : ' ') + { + unsigned int f = 0; + unsigned int dsr = readb(priv->regs.dsr); + printk(KERN_DEBUG PPIP32 " dsr=0x%02x", dsr); + if (!(dsr & DSR_nBUSY)) + printk("%cBusy", sep); + if (dsr & DSR_nACK) + printk("%cnAck", sep); + if (dsr & DSR_PERROR) + printk("%cPError", sep); + if (dsr & DSR_SELECT) + printk("%cSelect", sep); + if (dsr & DSR_nFAULT) + printk("%cnFault", sep); + if (!(dsr & DSR_nPRINT)) + printk("%c(Print)", sep); + if (dsr & DSR_TIMEOUT) + printk("%cTimeout", sep); + printk("\n"); + } +#undef sep +} +#else /* DEBUG_PARPORT_IP32 < 2 */ +#define parport_ip32_dump_state(...) do { } while (0) +#endif + +/* + * CHECK_EXTRA_BITS - track and log extra bits + * @p: pointer to &struct parport + * @b: byte to inspect + * @m: bit mask of authorized bits + * + * This is used to track and log extra bits that should not be there in + * parport_ip32_write_control() and parport_ip32_frob_control(). It is only + * defined if %DEBUG_PARPORT_IP32 >= 1. + */ +#if DEBUG_PARPORT_IP32 >= 1 +#define CHECK_EXTRA_BITS(p, b, m) \ + do { \ + unsigned int __b = (b), __m = (m); \ + if (__b & ~__m) \ + pr_debug1(PPIP32 "%s: extra bits in %s(%s): " \ + "0x%02x/0x%02x\n", \ + (p)->name, __func__, #b, __b, __m); \ + } while (0) +#else /* DEBUG_PARPORT_IP32 < 1 */ +#define CHECK_EXTRA_BITS(...) do { } while (0) +#endif + +/*--- IP32 parallel port DMA operations --------------------------------*/ + +/** + * struct parport_ip32_dma_data - private data needed for DMA operation + * @dir: DMA direction (from or to device) + * @buf: buffer physical address + * @len: buffer length + * @next: address of next bytes to DMA transfer + * @left: number of bytes remaining + * @ctx: next context to write (0: context_a; 1: context_b) + * @irq_on: are the DMA IRQs currently enabled? + * @lock: spinlock to protect access to the structure + */ +struct parport_ip32_dma_data { + enum dma_data_direction dir; + dma_addr_t buf; + dma_addr_t next; + size_t len; + size_t left; + unsigned int ctx; + unsigned int irq_on; + spinlock_t lock; +}; +static struct parport_ip32_dma_data parport_ip32_dma; + +/** + * parport_ip32_dma_setup_context - setup next DMA context + * @limit: maximum data size for the context + * + * The alignment constraints must be verified in caller function, and the + * parameter @limit must be set accordingly. + */ +static void parport_ip32_dma_setup_context(unsigned int limit) +{ + unsigned long flags; + + spin_lock_irqsave(&parport_ip32_dma.lock, flags); + if (parport_ip32_dma.left > 0) { + /* Note: ctxreg is "volatile" here only because + * mace->perif.ctrl.parport.context_a and context_b are + * "volatile". */ + volatile u64 __iomem *ctxreg = (parport_ip32_dma.ctx == 0) ? + &mace->perif.ctrl.parport.context_a : + &mace->perif.ctrl.parport.context_b; + u64 count; + u64 ctxval; + if (parport_ip32_dma.left <= limit) { + count = parport_ip32_dma.left; + ctxval = MACEPAR_CONTEXT_LASTFLAG; + } else { + count = limit; + ctxval = 0; + } + + pr_trace(NULL, + "(%u): 0x%04x:0x%04x, %u -> %u%s", + limit, + (unsigned int)parport_ip32_dma.buf, + (unsigned int)parport_ip32_dma.next, + (unsigned int)count, + parport_ip32_dma.ctx, ctxval ? "*" : ""); + + ctxval |= parport_ip32_dma.next & + MACEPAR_CONTEXT_BASEADDR_MASK; + ctxval |= ((count - 1) << MACEPAR_CONTEXT_DATALEN_SHIFT) & + MACEPAR_CONTEXT_DATALEN_MASK; + writeq(ctxval, ctxreg); + parport_ip32_dma.next += count; + parport_ip32_dma.left -= count; + parport_ip32_dma.ctx ^= 1U; + } + /* If there is nothing more to send, disable IRQs to avoid to + * face an IRQ storm which can lock the machine. Disable them + * only once. */ + if (parport_ip32_dma.left == 0 && parport_ip32_dma.irq_on) { + pr_debug(PPIP32 "IRQ off (ctx)\n"); + disable_irq_nosync(MACEISA_PAR_CTXA_IRQ); + disable_irq_nosync(MACEISA_PAR_CTXB_IRQ); + parport_ip32_dma.irq_on = 0; + } + spin_unlock_irqrestore(&parport_ip32_dma.lock, flags); +} + +/** + * parport_ip32_dma_interrupt - DMA interrupt handler + * @irq: interrupt number + * @dev_id: unused + */ +static irqreturn_t parport_ip32_dma_interrupt(int irq, void *dev_id) +{ + if (parport_ip32_dma.left) + pr_trace(NULL, "(%d): ctx=%d", irq, parport_ip32_dma.ctx); + parport_ip32_dma_setup_context(MACEPAR_CONTEXT_DATA_BOUND); + return IRQ_HANDLED; +} + +#if DEBUG_PARPORT_IP32 +static irqreturn_t parport_ip32_merr_interrupt(int irq, void *dev_id) +{ + pr_trace1(NULL, "(%d)", irq); + return IRQ_HANDLED; +} +#endif + +/** + * parport_ip32_dma_start - begins a DMA transfer + * @dir: DMA direction: DMA_TO_DEVICE or DMA_FROM_DEVICE + * @addr: pointer to data buffer + * @count: buffer size + * + * Calls to parport_ip32_dma_start() and parport_ip32_dma_stop() must be + * correctly balanced. + */ +static int parport_ip32_dma_start(enum dma_data_direction dir, + void *addr, size_t count) +{ + unsigned int limit; + u64 ctrl; + + pr_trace(NULL, "(%d, %lu)", dir, (unsigned long)count); + + /* FIXME - add support for DMA_FROM_DEVICE. In this case, buffer must + * be 64 bytes aligned. */ + BUG_ON(dir != DMA_TO_DEVICE); + + /* Reset DMA controller */ + ctrl = MACEPAR_CTLSTAT_RESET; + writeq(ctrl, &mace->perif.ctrl.parport.cntlstat); + + /* DMA IRQs should normally be enabled */ + if (!parport_ip32_dma.irq_on) { + WARN_ON(1); + enable_irq(MACEISA_PAR_CTXA_IRQ); + enable_irq(MACEISA_PAR_CTXB_IRQ); + parport_ip32_dma.irq_on = 1; + } + + /* Prepare DMA pointers */ + parport_ip32_dma.dir = dir; + parport_ip32_dma.buf = dma_map_single(NULL, addr, count, dir); + parport_ip32_dma.len = count; + parport_ip32_dma.next = parport_ip32_dma.buf; + parport_ip32_dma.left = parport_ip32_dma.len; + parport_ip32_dma.ctx = 0; + + /* Setup DMA direction and first two contexts */ + ctrl = (dir == DMA_TO_DEVICE) ? 0 : MACEPAR_CTLSTAT_DIRECTION; + writeq(ctrl, &mace->perif.ctrl.parport.cntlstat); + /* Single transfer should not cross a 4K page boundary */ + limit = MACEPAR_CONTEXT_DATA_BOUND - + (parport_ip32_dma.next & (MACEPAR_CONTEXT_DATA_BOUND - 1)); + parport_ip32_dma_setup_context(limit); + parport_ip32_dma_setup_context(MACEPAR_CONTEXT_DATA_BOUND); + + /* Real start of DMA transfer */ + ctrl |= MACEPAR_CTLSTAT_ENABLE; + writeq(ctrl, &mace->perif.ctrl.parport.cntlstat); + + return 0; +} + +/** + * parport_ip32_dma_stop - ends a running DMA transfer + * + * Calls to parport_ip32_dma_start() and parport_ip32_dma_stop() must be + * correctly balanced. + */ +static void parport_ip32_dma_stop(void) +{ + u64 ctx_a; + u64 ctx_b; + u64 ctrl; + u64 diag; + size_t res[2]; /* {[0] = res_a, [1] = res_b} */ + + pr_trace(NULL, "()"); + + /* Disable IRQs */ + spin_lock_irq(&parport_ip32_dma.lock); + if (parport_ip32_dma.irq_on) { + pr_debug(PPIP32 "IRQ off (stop)\n"); + disable_irq_nosync(MACEISA_PAR_CTXA_IRQ); + disable_irq_nosync(MACEISA_PAR_CTXB_IRQ); + parport_ip32_dma.irq_on = 0; + } + spin_unlock_irq(&parport_ip32_dma.lock); + /* Force IRQ synchronization, even if the IRQs were disabled + * elsewhere. */ + synchronize_irq(MACEISA_PAR_CTXA_IRQ); + synchronize_irq(MACEISA_PAR_CTXB_IRQ); + + /* Stop DMA transfer */ + ctrl = readq(&mace->perif.ctrl.parport.cntlstat); + ctrl &= ~MACEPAR_CTLSTAT_ENABLE; + writeq(ctrl, &mace->perif.ctrl.parport.cntlstat); + + /* Adjust residue (parport_ip32_dma.left) */ + ctx_a = readq(&mace->perif.ctrl.parport.context_a); + ctx_b = readq(&mace->perif.ctrl.parport.context_b); + ctrl = readq(&mace->perif.ctrl.parport.cntlstat); + diag = readq(&mace->perif.ctrl.parport.diagnostic); + res[0] = (ctrl & MACEPAR_CTLSTAT_CTXA_VALID) ? + 1 + ((ctx_a & MACEPAR_CONTEXT_DATALEN_MASK) >> + MACEPAR_CONTEXT_DATALEN_SHIFT) : + 0; + res[1] = (ctrl & MACEPAR_CTLSTAT_CTXB_VALID) ? + 1 + ((ctx_b & MACEPAR_CONTEXT_DATALEN_MASK) >> + MACEPAR_CONTEXT_DATALEN_SHIFT) : + 0; + if (diag & MACEPAR_DIAG_DMACTIVE) + res[(diag & MACEPAR_DIAG_CTXINUSE) != 0] = + 1 + ((diag & MACEPAR_DIAG_CTRMASK) >> + MACEPAR_DIAG_CTRSHIFT); + parport_ip32_dma.left += res[0] + res[1]; + + /* Reset DMA controller, and re-enable IRQs */ + ctrl = MACEPAR_CTLSTAT_RESET; + writeq(ctrl, &mace->perif.ctrl.parport.cntlstat); + pr_debug(PPIP32 "IRQ on (stop)\n"); + enable_irq(MACEISA_PAR_CTXA_IRQ); + enable_irq(MACEISA_PAR_CTXB_IRQ); + parport_ip32_dma.irq_on = 1; + + dma_unmap_single(NULL, parport_ip32_dma.buf, parport_ip32_dma.len, + parport_ip32_dma.dir); +} + +/** + * parport_ip32_dma_get_residue - get residue from last DMA transfer + * + * Returns the number of bytes remaining from last DMA transfer. + */ +static inline size_t parport_ip32_dma_get_residue(void) +{ + return parport_ip32_dma.left; +} + +/** + * parport_ip32_dma_register - initialize DMA engine + * + * Returns zero for success. + */ +static int parport_ip32_dma_register(void) +{ + int err; + + spin_lock_init(&parport_ip32_dma.lock); + parport_ip32_dma.irq_on = 1; + + /* Reset DMA controller */ + writeq(MACEPAR_CTLSTAT_RESET, &mace->perif.ctrl.parport.cntlstat); + + /* Request IRQs */ + err = request_irq(MACEISA_PAR_CTXA_IRQ, parport_ip32_dma_interrupt, + 0, "parport_ip32", NULL); + if (err) + goto fail_a; + err = request_irq(MACEISA_PAR_CTXB_IRQ, parport_ip32_dma_interrupt, + 0, "parport_ip32", NULL); + if (err) + goto fail_b; +#if DEBUG_PARPORT_IP32 + /* FIXME - what is this IRQ for? */ + err = request_irq(MACEISA_PAR_MERR_IRQ, parport_ip32_merr_interrupt, + 0, "parport_ip32", NULL); + if (err) + goto fail_merr; +#endif + return 0; + +#if DEBUG_PARPORT_IP32 +fail_merr: + free_irq(MACEISA_PAR_CTXB_IRQ, NULL); +#endif +fail_b: + free_irq(MACEISA_PAR_CTXA_IRQ, NULL); +fail_a: + return err; +} + +/** + * parport_ip32_dma_unregister - release and free resources for DMA engine + */ +static void parport_ip32_dma_unregister(void) +{ +#if DEBUG_PARPORT_IP32 + free_irq(MACEISA_PAR_MERR_IRQ, NULL); +#endif + free_irq(MACEISA_PAR_CTXB_IRQ, NULL); + free_irq(MACEISA_PAR_CTXA_IRQ, NULL); +} + +/*--- Interrupt handlers and associates --------------------------------*/ + +/** + * parport_ip32_wakeup - wakes up code waiting for an interrupt + * @p: pointer to &struct parport + */ +static inline void parport_ip32_wakeup(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + complete(&priv->irq_complete); +} + +/** + * parport_ip32_interrupt - interrupt handler + * @irq: interrupt number + * @dev_id: pointer to &struct parport + * + * Caught interrupts are forwarded to the upper parport layer if IRQ_mode is + * %PARPORT_IP32_IRQ_FWD. + */ +static irqreturn_t parport_ip32_interrupt(int irq, void *dev_id) +{ + struct parport * const p = dev_id; + struct parport_ip32_private * const priv = p->physport->private_data; + enum parport_ip32_irq_mode irq_mode = priv->irq_mode; + + switch (irq_mode) { + case PARPORT_IP32_IRQ_FWD: + return parport_irq_handler(irq, dev_id); + + case PARPORT_IP32_IRQ_HERE: + parport_ip32_wakeup(p); + break; + } + + return IRQ_HANDLED; +} + +/*--- Some utility function to manipulate ECR register -----------------*/ + +/** + * parport_ip32_read_econtrol - read contents of the ECR register + * @p: pointer to &struct parport + */ +static inline unsigned int parport_ip32_read_econtrol(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return readb(priv->regs.ecr); +} + +/** + * parport_ip32_write_econtrol - write new contents to the ECR register + * @p: pointer to &struct parport + * @c: new value to write + */ +static inline void parport_ip32_write_econtrol(struct parport *p, + unsigned int c) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + writeb(c, priv->regs.ecr); +} + +/** + * parport_ip32_frob_econtrol - change bits from the ECR register + * @p: pointer to &struct parport + * @mask: bit mask of bits to change + * @val: new value for changed bits + * + * Read from the ECR, mask out the bits in @mask, exclusive-or with the bits + * in @val, and write the result to the ECR. + */ +static inline void parport_ip32_frob_econtrol(struct parport *p, + unsigned int mask, + unsigned int val) +{ + unsigned int c; + c = (parport_ip32_read_econtrol(p) & ~mask) ^ val; + parport_ip32_write_econtrol(p, c); +} + +/** + * parport_ip32_set_mode - change mode of ECP port + * @p: pointer to &struct parport + * @mode: new mode to write in ECR + * + * ECR is reset in a sane state (interrupts and DMA disabled), and placed in + * mode @mode. Go through PS2 mode if needed. + */ +static void parport_ip32_set_mode(struct parport *p, unsigned int mode) +{ + unsigned int omode; + + mode &= ECR_MODE_MASK; + omode = parport_ip32_read_econtrol(p) & ECR_MODE_MASK; + + if (!(mode == ECR_MODE_SPP || mode == ECR_MODE_PS2 + || omode == ECR_MODE_SPP || omode == ECR_MODE_PS2)) { + /* We have to go through PS2 mode */ + unsigned int ecr = ECR_MODE_PS2 | ECR_nERRINTR | ECR_SERVINTR; + parport_ip32_write_econtrol(p, ecr); + } + parport_ip32_write_econtrol(p, mode | ECR_nERRINTR | ECR_SERVINTR); +} + +/*--- Basic functions needed for parport -------------------------------*/ + +/** + * parport_ip32_read_data - return current contents of the DATA register + * @p: pointer to &struct parport + */ +static inline unsigned char parport_ip32_read_data(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return readb(priv->regs.data); +} + +/** + * parport_ip32_write_data - set new contents for the DATA register + * @p: pointer to &struct parport + * @d: new value to write + */ +static inline void parport_ip32_write_data(struct parport *p, unsigned char d) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + writeb(d, priv->regs.data); +} + +/** + * parport_ip32_read_status - return current contents of the DSR register + * @p: pointer to &struct parport + */ +static inline unsigned char parport_ip32_read_status(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return readb(priv->regs.dsr); +} + +/** + * __parport_ip32_read_control - return cached contents of the DCR register + * @p: pointer to &struct parport + */ +static inline unsigned int __parport_ip32_read_control(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return priv->dcr_cache; /* use soft copy */ +} + +/** + * __parport_ip32_write_control - set new contents for the DCR register + * @p: pointer to &struct parport + * @c: new value to write + */ +static inline void __parport_ip32_write_control(struct parport *p, + unsigned int c) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + CHECK_EXTRA_BITS(p, c, priv->dcr_writable); + c &= priv->dcr_writable; /* only writable bits */ + writeb(c, priv->regs.dcr); + priv->dcr_cache = c; /* update soft copy */ +} + +/** + * __parport_ip32_frob_control - change bits from the DCR register + * @p: pointer to &struct parport + * @mask: bit mask of bits to change + * @val: new value for changed bits + * + * This is equivalent to read from the DCR, mask out the bits in @mask, + * exclusive-or with the bits in @val, and write the result to the DCR. + * Actually, the cached contents of the DCR is used. + */ +static inline void __parport_ip32_frob_control(struct parport *p, + unsigned int mask, + unsigned int val) +{ + unsigned int c; + c = (__parport_ip32_read_control(p) & ~mask) ^ val; + __parport_ip32_write_control(p, c); +} + +/** + * parport_ip32_read_control - return cached contents of the DCR register + * @p: pointer to &struct parport + * + * The return value is masked so as to only return the value of %DCR_STROBE, + * %DCR_AUTOFD, %DCR_nINIT, and %DCR_SELECT. + */ +static inline unsigned char parport_ip32_read_control(struct parport *p) +{ + const unsigned int rm = + DCR_STROBE | DCR_AUTOFD | DCR_nINIT | DCR_SELECT; + return __parport_ip32_read_control(p) & rm; +} + +/** + * parport_ip32_write_control - set new contents for the DCR register + * @p: pointer to &struct parport + * @c: new value to write + * + * The value is masked so as to only change the value of %DCR_STROBE, + * %DCR_AUTOFD, %DCR_nINIT, and %DCR_SELECT. + */ +static inline void parport_ip32_write_control(struct parport *p, + unsigned char c) +{ + const unsigned int wm = + DCR_STROBE | DCR_AUTOFD | DCR_nINIT | DCR_SELECT; + CHECK_EXTRA_BITS(p, c, wm); + __parport_ip32_frob_control(p, wm, c & wm); +} + +/** + * parport_ip32_frob_control - change bits from the DCR register + * @p: pointer to &struct parport + * @mask: bit mask of bits to change + * @val: new value for changed bits + * + * This differs from __parport_ip32_frob_control() in that it only allows to + * change the value of %DCR_STROBE, %DCR_AUTOFD, %DCR_nINIT, and %DCR_SELECT. + */ +static inline unsigned char parport_ip32_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + const unsigned int wm = + DCR_STROBE | DCR_AUTOFD | DCR_nINIT | DCR_SELECT; + CHECK_EXTRA_BITS(p, mask, wm); + CHECK_EXTRA_BITS(p, val, wm); + __parport_ip32_frob_control(p, mask & wm, val & wm); + return parport_ip32_read_control(p); +} + +/** + * parport_ip32_disable_irq - disable interrupts on the rising edge of nACK + * @p: pointer to &struct parport + */ +static inline void parport_ip32_disable_irq(struct parport *p) +{ + __parport_ip32_frob_control(p, DCR_IRQ, 0); +} + +/** + * parport_ip32_enable_irq - enable interrupts on the rising edge of nACK + * @p: pointer to &struct parport + */ +static inline void parport_ip32_enable_irq(struct parport *p) +{ + __parport_ip32_frob_control(p, DCR_IRQ, DCR_IRQ); +} + +/** + * parport_ip32_data_forward - enable host-to-peripheral communications + * @p: pointer to &struct parport + * + * Enable the data line drivers, for 8-bit host-to-peripheral communications. + */ +static inline void parport_ip32_data_forward(struct parport *p) +{ + __parport_ip32_frob_control(p, DCR_DIR, 0); +} + +/** + * parport_ip32_data_reverse - enable peripheral-to-host communications + * @p: pointer to &struct parport + * + * Place the data bus in a high impedance state, if @p->modes has the + * PARPORT_MODE_TRISTATE bit set. + */ +static inline void parport_ip32_data_reverse(struct parport *p) +{ + __parport_ip32_frob_control(p, DCR_DIR, DCR_DIR); +} + +/** + * parport_ip32_init_state - for core parport code + * @dev: pointer to &struct pardevice + * @s: pointer to &struct parport_state to initialize + */ +static void parport_ip32_init_state(struct pardevice *dev, + struct parport_state *s) +{ + s->u.ip32.dcr = DCR_SELECT | DCR_nINIT; + s->u.ip32.ecr = ECR_MODE_PS2 | ECR_nERRINTR | ECR_SERVINTR; +} + +/** + * parport_ip32_save_state - for core parport code + * @p: pointer to &struct parport + * @s: pointer to &struct parport_state to save state to + */ +static void parport_ip32_save_state(struct parport *p, + struct parport_state *s) +{ + s->u.ip32.dcr = __parport_ip32_read_control(p); + s->u.ip32.ecr = parport_ip32_read_econtrol(p); +} + +/** + * parport_ip32_restore_state - for core parport code + * @p: pointer to &struct parport + * @s: pointer to &struct parport_state to restore state from + */ +static void parport_ip32_restore_state(struct parport *p, + struct parport_state *s) +{ + parport_ip32_set_mode(p, s->u.ip32.ecr & ECR_MODE_MASK); + parport_ip32_write_econtrol(p, s->u.ip32.ecr); + __parport_ip32_write_control(p, s->u.ip32.dcr); +} + +/*--- EPP mode functions -----------------------------------------------*/ + +/** + * parport_ip32_clear_epp_timeout - clear Timeout bit in EPP mode + * @p: pointer to &struct parport + * + * Returns 1 if the Timeout bit is clear, and 0 otherwise. + */ +static unsigned int parport_ip32_clear_epp_timeout(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + unsigned int cleared; + + if (!(parport_ip32_read_status(p) & DSR_TIMEOUT)) + cleared = 1; + else { + unsigned int r; + /* To clear timeout some chips require double read */ + parport_ip32_read_status(p); + r = parport_ip32_read_status(p); + /* Some reset by writing 1 */ + writeb(r | DSR_TIMEOUT, priv->regs.dsr); + /* Others by writing 0 */ + writeb(r & ~DSR_TIMEOUT, priv->regs.dsr); + + r = parport_ip32_read_status(p); + cleared = !(r & DSR_TIMEOUT); + } + + pr_trace(p, "(): %s", cleared ? "cleared" : "failed"); + return cleared; +} + +/** + * parport_ip32_epp_read - generic EPP read function + * @eppreg: I/O register to read from + * @p: pointer to &struct parport + * @buf: buffer to store read data + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_read(void __iomem *eppreg, + struct parport *p, void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + size_t got; + parport_ip32_set_mode(p, ECR_MODE_EPP); + parport_ip32_data_reverse(p); + parport_ip32_write_control(p, DCR_nINIT); + if ((flags & PARPORT_EPP_FAST) && (len > 1)) { + readsb(eppreg, buf, len); + if (readb(priv->regs.dsr) & DSR_TIMEOUT) { + parport_ip32_clear_epp_timeout(p); + return -EIO; + } + got = len; + } else { + u8 *bufp = buf; + for (got = 0; got < len; got++) { + *bufp++ = readb(eppreg); + if (readb(priv->regs.dsr) & DSR_TIMEOUT) { + parport_ip32_clear_epp_timeout(p); + break; + } + } + } + parport_ip32_data_forward(p); + parport_ip32_set_mode(p, ECR_MODE_PS2); + return got; +} + +/** + * parport_ip32_epp_write - generic EPP write function + * @eppreg: I/O register to write to + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_write(void __iomem *eppreg, + struct parport *p, const void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + size_t written; + parport_ip32_set_mode(p, ECR_MODE_EPP); + parport_ip32_data_forward(p); + parport_ip32_write_control(p, DCR_nINIT); + if ((flags & PARPORT_EPP_FAST) && (len > 1)) { + writesb(eppreg, buf, len); + if (readb(priv->regs.dsr) & DSR_TIMEOUT) { + parport_ip32_clear_epp_timeout(p); + return -EIO; + } + written = len; + } else { + const u8 *bufp = buf; + for (written = 0; written < len; written++) { + writeb(*bufp++, eppreg); + if (readb(priv->regs.dsr) & DSR_TIMEOUT) { + parport_ip32_clear_epp_timeout(p); + break; + } + } + } + parport_ip32_set_mode(p, ECR_MODE_PS2); + return written; +} + +/** + * parport_ip32_epp_read_data - read a block of data in EPP mode + * @p: pointer to &struct parport + * @buf: buffer to store read data + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_read_data(struct parport *p, void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return parport_ip32_epp_read(priv->regs.eppData0, p, buf, len, flags); +} + +/** + * parport_ip32_epp_write_data - write a block of data in EPP mode + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_write_data(struct parport *p, const void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return parport_ip32_epp_write(priv->regs.eppData0, p, buf, len, flags); +} + +/** + * parport_ip32_epp_read_addr - read a block of addresses in EPP mode + * @p: pointer to &struct parport + * @buf: buffer to store read data + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_read_addr(struct parport *p, void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return parport_ip32_epp_read(priv->regs.eppAddr, p, buf, len, flags); +} + +/** + * parport_ip32_epp_write_addr - write a block of addresses in EPP mode + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * @flags: may be PARPORT_EPP_FAST + */ +static size_t parport_ip32_epp_write_addr(struct parport *p, const void *buf, + size_t len, int flags) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + return parport_ip32_epp_write(priv->regs.eppAddr, p, buf, len, flags); +} + +/*--- ECP mode functions (FIFO) ----------------------------------------*/ + +/** + * parport_ip32_fifo_wait_break - check if the waiting function should return + * @p: pointer to &struct parport + * @expire: timeout expiring date, in jiffies + * + * parport_ip32_fifo_wait_break() checks if the waiting function should return + * immediately or not. The break conditions are: + * - expired timeout; + * - a pending signal; + * - nFault asserted low. + * This function also calls cond_resched(). + */ +static unsigned int parport_ip32_fifo_wait_break(struct parport *p, + unsigned long expire) +{ + cond_resched(); + if (time_after(jiffies, expire)) { + pr_debug1(PPIP32 "%s: FIFO write timed out\n", p->name); + return 1; + } + if (signal_pending(current)) { + pr_debug1(PPIP32 "%s: Signal pending\n", p->name); + return 1; + } + if (!(parport_ip32_read_status(p) & DSR_nFAULT)) { + pr_debug1(PPIP32 "%s: nFault asserted low\n", p->name); + return 1; + } + return 0; +} + +/** + * parport_ip32_fwp_wait_polling - wait for FIFO to empty (polling) + * @p: pointer to &struct parport + * + * Returns the number of bytes that can safely be written in the FIFO. A + * return value of zero means that the calling function should terminate as + * fast as possible. + */ +static unsigned int parport_ip32_fwp_wait_polling(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport * const physport = p->physport; + unsigned long expire; + unsigned int count; + unsigned int ecr; + + expire = jiffies + physport->cad->timeout; + count = 0; + while (1) { + if (parport_ip32_fifo_wait_break(p, expire)) + break; + + /* Check FIFO state. We do nothing when the FIFO is nor full, + * nor empty. It appears that the FIFO full bit is not always + * reliable, the FIFO state is sometimes wrongly reported, and + * the chip gets confused if we give it another byte. */ + ecr = parport_ip32_read_econtrol(p); + if (ecr & ECR_F_EMPTY) { + /* FIFO is empty, fill it up */ + count = priv->fifo_depth; + break; + } + + /* Wait a moment... */ + udelay(FIFO_POLLING_INTERVAL); + } /* while (1) */ + + return count; +} + +/** + * parport_ip32_fwp_wait_interrupt - wait for FIFO to empty (interrupt-driven) + * @p: pointer to &struct parport + * + * Returns the number of bytes that can safely be written in the FIFO. A + * return value of zero means that the calling function should terminate as + * fast as possible. + */ +static unsigned int parport_ip32_fwp_wait_interrupt(struct parport *p) +{ + static unsigned int lost_interrupt = 0; + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport * const physport = p->physport; + unsigned long nfault_timeout; + unsigned long expire; + unsigned int count; + unsigned int ecr; + + nfault_timeout = min((unsigned long)physport->cad->timeout, + msecs_to_jiffies(FIFO_NFAULT_TIMEOUT)); + expire = jiffies + physport->cad->timeout; + count = 0; + while (1) { + if (parport_ip32_fifo_wait_break(p, expire)) + break; + + /* Initialize mutex used to take interrupts into account */ + reinit_completion(&priv->irq_complete); + + /* Enable serviceIntr */ + parport_ip32_frob_econtrol(p, ECR_SERVINTR, 0); + + /* Enabling serviceIntr while the FIFO is empty does not + * always generate an interrupt, so check for emptiness + * now. */ + ecr = parport_ip32_read_econtrol(p); + if (!(ecr & ECR_F_EMPTY)) { + /* FIFO is not empty: wait for an interrupt or a + * timeout to occur */ + wait_for_completion_interruptible_timeout( + &priv->irq_complete, nfault_timeout); + ecr = parport_ip32_read_econtrol(p); + if ((ecr & ECR_F_EMPTY) && !(ecr & ECR_SERVINTR) + && !lost_interrupt) { + printk(KERN_WARNING PPIP32 + "%s: lost interrupt in %s\n", + p->name, __func__); + lost_interrupt = 1; + } + } + + /* Disable serviceIntr */ + parport_ip32_frob_econtrol(p, ECR_SERVINTR, ECR_SERVINTR); + + /* Check FIFO state */ + if (ecr & ECR_F_EMPTY) { + /* FIFO is empty, fill it up */ + count = priv->fifo_depth; + break; + } else if (ecr & ECR_SERVINTR) { + /* FIFO is not empty, but we know that can safely push + * writeIntrThreshold bytes into it */ + count = priv->writeIntrThreshold; + break; + } + /* FIFO is not empty, and we did not get any interrupt. + * Either it's time to check for nFault, or a signal is + * pending. This is verified in + * parport_ip32_fifo_wait_break(), so we continue the loop. */ + } /* while (1) */ + + return count; +} + +/** + * parport_ip32_fifo_write_block_pio - write a block of data (PIO mode) + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * + * Uses PIO to write the contents of the buffer @buf into the parallel port + * FIFO. Returns the number of bytes that were actually written. It can work + * with or without the help of interrupts. The parallel port must be + * correctly initialized before calling parport_ip32_fifo_write_block_pio(). + */ +static size_t parport_ip32_fifo_write_block_pio(struct parport *p, + const void *buf, size_t len) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + const u8 *bufp = buf; + size_t left = len; + + priv->irq_mode = PARPORT_IP32_IRQ_HERE; + + while (left > 0) { + unsigned int count; + + count = (p->irq == PARPORT_IRQ_NONE) ? + parport_ip32_fwp_wait_polling(p) : + parport_ip32_fwp_wait_interrupt(p); + if (count == 0) + break; /* Transmission should be stopped */ + if (count > left) + count = left; + if (count == 1) { + writeb(*bufp, priv->regs.fifo); + bufp++, left--; + } else { + writesb(priv->regs.fifo, bufp, count); + bufp += count, left -= count; + } + } + + priv->irq_mode = PARPORT_IP32_IRQ_FWD; + + return len - left; +} + +/** + * parport_ip32_fifo_write_block_dma - write a block of data (DMA mode) + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * + * Uses DMA to write the contents of the buffer @buf into the parallel port + * FIFO. Returns the number of bytes that were actually written. The + * parallel port must be correctly initialized before calling + * parport_ip32_fifo_write_block_dma(). + */ +static size_t parport_ip32_fifo_write_block_dma(struct parport *p, + const void *buf, size_t len) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport * const physport = p->physport; + unsigned long nfault_timeout; + unsigned long expire; + size_t written; + unsigned int ecr; + + priv->irq_mode = PARPORT_IP32_IRQ_HERE; + + parport_ip32_dma_start(DMA_TO_DEVICE, (void *)buf, len); + reinit_completion(&priv->irq_complete); + parport_ip32_frob_econtrol(p, ECR_DMAEN | ECR_SERVINTR, ECR_DMAEN); + + nfault_timeout = min((unsigned long)physport->cad->timeout, + msecs_to_jiffies(FIFO_NFAULT_TIMEOUT)); + expire = jiffies + physport->cad->timeout; + while (1) { + if (parport_ip32_fifo_wait_break(p, expire)) + break; + wait_for_completion_interruptible_timeout(&priv->irq_complete, + nfault_timeout); + ecr = parport_ip32_read_econtrol(p); + if (ecr & ECR_SERVINTR) + break; /* DMA transfer just finished */ + } + parport_ip32_dma_stop(); + written = len - parport_ip32_dma_get_residue(); + + priv->irq_mode = PARPORT_IP32_IRQ_FWD; + + return written; +} + +/** + * parport_ip32_fifo_write_block - write a block of data + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * + * Uses PIO or DMA to write the contents of the buffer @buf into the parallel + * p FIFO. Returns the number of bytes that were actually written. + */ +static size_t parport_ip32_fifo_write_block(struct parport *p, + const void *buf, size_t len) +{ + size_t written = 0; + if (len) + /* FIXME - Maybe some threshold value should be set for @len + * under which we revert to PIO mode? */ + written = (p->modes & PARPORT_MODE_DMA) ? + parport_ip32_fifo_write_block_dma(p, buf, len) : + parport_ip32_fifo_write_block_pio(p, buf, len); + return written; +} + +/** + * parport_ip32_drain_fifo - wait for FIFO to empty + * @p: pointer to &struct parport + * @timeout: timeout, in jiffies + * + * This function waits for FIFO to empty. It returns 1 when FIFO is empty, or + * 0 if the timeout @timeout is reached before, or if a signal is pending. + */ +static unsigned int parport_ip32_drain_fifo(struct parport *p, + unsigned long timeout) +{ + unsigned long expire = jiffies + timeout; + unsigned int polling_interval; + unsigned int counter; + + /* Busy wait for approx. 200us */ + for (counter = 0; counter < 40; counter++) { + if (parport_ip32_read_econtrol(p) & ECR_F_EMPTY) + break; + if (time_after(jiffies, expire)) + break; + if (signal_pending(current)) + break; + udelay(5); + } + /* Poll slowly. Polling interval starts with 1 millisecond, and is + * increased exponentially until 128. */ + polling_interval = 1; /* msecs */ + while (!(parport_ip32_read_econtrol(p) & ECR_F_EMPTY)) { + if (time_after_eq(jiffies, expire)) + break; + msleep_interruptible(polling_interval); + if (signal_pending(current)) + break; + if (polling_interval < 128) + polling_interval *= 2; + } + + return !!(parport_ip32_read_econtrol(p) & ECR_F_EMPTY); +} + +/** + * parport_ip32_get_fifo_residue - reset FIFO + * @p: pointer to &struct parport + * @mode: current operation mode (ECR_MODE_PPF or ECR_MODE_ECP) + * + * This function resets FIFO, and returns the number of bytes remaining in it. + */ +static unsigned int parport_ip32_get_fifo_residue(struct parport *p, + unsigned int mode) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + unsigned int residue; + unsigned int cnfga; + + /* FIXME - We are missing one byte if the printer is off-line. I + * don't know how to detect this. It looks that the full bit is not + * always reliable. For the moment, the problem is avoided in most + * cases by testing for BUSY in parport_ip32_compat_write_data(). + */ + if (parport_ip32_read_econtrol(p) & ECR_F_EMPTY) + residue = 0; + else { + pr_debug1(PPIP32 "%s: FIFO is stuck\n", p->name); + + /* Stop all transfers. + * + * Microsoft's document instructs to drive DCR_STROBE to 0, + * but it doesn't work (at least in Compatibility mode, not + * tested in ECP mode). Switching directly to Test mode (as + * in parport_pc) is not an option: it does confuse the port, + * ECP service interrupts are no more working after that. A + * hard reset is then needed to revert to a sane state. + * + * Let's hope that the FIFO is really stuck and that the + * peripheral doesn't wake up now. + */ + parport_ip32_frob_control(p, DCR_STROBE, 0); + + /* Fill up FIFO */ + for (residue = priv->fifo_depth; residue > 0; residue--) { + if (parport_ip32_read_econtrol(p) & ECR_F_FULL) + break; + writeb(0x00, priv->regs.fifo); + } + } + if (residue) + pr_debug1(PPIP32 "%s: %d PWord%s left in FIFO\n", + p->name, residue, + (residue == 1) ? " was" : "s were"); + + /* Now reset the FIFO */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + + /* Host recovery for ECP mode */ + if (mode == ECR_MODE_ECP) { + parport_ip32_data_reverse(p); + parport_ip32_frob_control(p, DCR_nINIT, 0); + if (parport_wait_peripheral(p, DSR_PERROR, 0)) + pr_debug1(PPIP32 "%s: PEerror timeout 1 in %s\n", + p->name, __func__); + parport_ip32_frob_control(p, DCR_STROBE, DCR_STROBE); + parport_ip32_frob_control(p, DCR_nINIT, DCR_nINIT); + if (parport_wait_peripheral(p, DSR_PERROR, DSR_PERROR)) + pr_debug1(PPIP32 "%s: PEerror timeout 2 in %s\n", + p->name, __func__); + } + + /* Adjust residue if needed */ + parport_ip32_set_mode(p, ECR_MODE_CFG); + cnfga = readb(priv->regs.cnfgA); + if (!(cnfga & CNFGA_nBYTEINTRANS)) { + pr_debug1(PPIP32 "%s: cnfgA contains 0x%02x\n", + p->name, cnfga); + pr_debug1(PPIP32 "%s: Accounting for extra byte\n", + p->name); + residue++; + } + + /* Don't care about partial PWords since we do not support + * PWord != 1 byte. */ + + /* Back to forward PS2 mode. */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + parport_ip32_data_forward(p); + + return residue; +} + +/** + * parport_ip32_compat_write_data - write a block of data in SPP mode + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * @flags: ignored + */ +static size_t parport_ip32_compat_write_data(struct parport *p, + const void *buf, size_t len, + int flags) +{ + static unsigned int ready_before = 1; + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport * const physport = p->physport; + size_t written = 0; + + /* Special case: a timeout of zero means we cannot call schedule(). + * Also if O_NONBLOCK is set then use the default implementation. */ + if (physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK) + return parport_ieee1284_write_compat(p, buf, len, flags); + + /* Reset FIFO, go in forward mode, and disable ackIntEn */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + parport_ip32_write_control(p, DCR_SELECT | DCR_nINIT); + parport_ip32_data_forward(p); + parport_ip32_disable_irq(p); + parport_ip32_set_mode(p, ECR_MODE_PPF); + physport->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* Wait for peripheral to become ready */ + if (parport_wait_peripheral(p, DSR_nBUSY | DSR_nFAULT, + DSR_nBUSY | DSR_nFAULT)) { + /* Avoid to flood the logs */ + if (ready_before) + printk(KERN_INFO PPIP32 "%s: not ready in %s\n", + p->name, __func__); + ready_before = 0; + goto stop; + } + ready_before = 1; + + written = parport_ip32_fifo_write_block(p, buf, len); + + /* Wait FIFO to empty. Timeout is proportional to FIFO_depth. */ + parport_ip32_drain_fifo(p, physport->cad->timeout * priv->fifo_depth); + + /* Check for a potential residue */ + written -= parport_ip32_get_fifo_residue(p, ECR_MODE_PPF); + + /* Then, wait for BUSY to get low. */ + if (parport_wait_peripheral(p, DSR_nBUSY, DSR_nBUSY)) + printk(KERN_DEBUG PPIP32 "%s: BUSY timeout in %s\n", + p->name, __func__); + +stop: + /* Reset FIFO */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +} + +/* + * FIXME - Insert here parport_ip32_ecp_read_data(). + */ + +/** + * parport_ip32_ecp_write_data - write a block of data in ECP mode + * @p: pointer to &struct parport + * @buf: buffer of data to write + * @len: length of buffer @buf + * @flags: ignored + */ +static size_t parport_ip32_ecp_write_data(struct parport *p, + const void *buf, size_t len, + int flags) +{ + static unsigned int ready_before = 1; + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport * const physport = p->physport; + size_t written = 0; + + /* Special case: a timeout of zero means we cannot call schedule(). + * Also if O_NONBLOCK is set then use the default implementation. */ + if (physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK) + return parport_ieee1284_ecp_write_data(p, buf, len, flags); + + /* Negotiate to forward mode if necessary. */ + if (physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) { + /* Event 47: Set nInit high. */ + parport_ip32_frob_control(p, DCR_nINIT | DCR_AUTOFD, + DCR_nINIT | DCR_AUTOFD); + + /* Event 49: PError goes high. */ + if (parport_wait_peripheral(p, DSR_PERROR, DSR_PERROR)) { + printk(KERN_DEBUG PPIP32 "%s: PError timeout in %s", + p->name, __func__); + physport->ieee1284.phase = IEEE1284_PH_ECP_DIR_UNKNOWN; + return 0; + } + } + + /* Reset FIFO, go in forward mode, and disable ackIntEn */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + parport_ip32_write_control(p, DCR_SELECT | DCR_nINIT); + parport_ip32_data_forward(p); + parport_ip32_disable_irq(p); + parport_ip32_set_mode(p, ECR_MODE_ECP); + physport->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* Wait for peripheral to become ready */ + if (parport_wait_peripheral(p, DSR_nBUSY | DSR_nFAULT, + DSR_nBUSY | DSR_nFAULT)) { + /* Avoid to flood the logs */ + if (ready_before) + printk(KERN_INFO PPIP32 "%s: not ready in %s\n", + p->name, __func__); + ready_before = 0; + goto stop; + } + ready_before = 1; + + written = parport_ip32_fifo_write_block(p, buf, len); + + /* Wait FIFO to empty. Timeout is proportional to FIFO_depth. */ + parport_ip32_drain_fifo(p, physport->cad->timeout * priv->fifo_depth); + + /* Check for a potential residue */ + written -= parport_ip32_get_fifo_residue(p, ECR_MODE_ECP); + + /* Then, wait for BUSY to get low. */ + if (parport_wait_peripheral(p, DSR_nBUSY, DSR_nBUSY)) + printk(KERN_DEBUG PPIP32 "%s: BUSY timeout in %s\n", + p->name, __func__); + +stop: + /* Reset FIFO */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +} + +/* + * FIXME - Insert here parport_ip32_ecp_write_addr(). + */ + +/*--- Default parport operations ---------------------------------------*/ + +static const struct parport_operations parport_ip32_ops __initconst = { + .write_data = parport_ip32_write_data, + .read_data = parport_ip32_read_data, + + .write_control = parport_ip32_write_control, + .read_control = parport_ip32_read_control, + .frob_control = parport_ip32_frob_control, + + .read_status = parport_ip32_read_status, + + .enable_irq = parport_ip32_enable_irq, + .disable_irq = parport_ip32_disable_irq, + + .data_forward = parport_ip32_data_forward, + .data_reverse = parport_ip32_data_reverse, + + .init_state = parport_ip32_init_state, + .save_state = parport_ip32_save_state, + .restore_state = parport_ip32_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +/*--- Device detection -------------------------------------------------*/ + +/** + * parport_ip32_ecp_supported - check for an ECP port + * @p: pointer to the &parport structure + * + * Returns 1 if an ECP port is found, and 0 otherwise. This function actually + * checks if an Extended Control Register seems to be present. On successful + * return, the port is placed in SPP mode. + */ +static __init unsigned int parport_ip32_ecp_supported(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + unsigned int ecr; + + ecr = ECR_MODE_PS2 | ECR_nERRINTR | ECR_SERVINTR; + writeb(ecr, priv->regs.ecr); + if (readb(priv->regs.ecr) != (ecr | ECR_F_EMPTY)) + goto fail; + + pr_probe(p, "Found working ECR register\n"); + parport_ip32_set_mode(p, ECR_MODE_SPP); + parport_ip32_write_control(p, DCR_SELECT | DCR_nINIT); + return 1; + +fail: + pr_probe(p, "ECR register not found\n"); + return 0; +} + +/** + * parport_ip32_fifo_supported - check for FIFO parameters + * @p: pointer to the &parport structure + * + * Check for FIFO parameters of an Extended Capabilities Port. Returns 1 on + * success, and 0 otherwise. Adjust FIFO parameters in the parport structure. + * On return, the port is placed in SPP mode. + */ +static __init unsigned int parport_ip32_fifo_supported(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + unsigned int configa, configb; + unsigned int pword; + unsigned int i; + + /* Configuration mode */ + parport_ip32_set_mode(p, ECR_MODE_CFG); + configa = readb(priv->regs.cnfgA); + configb = readb(priv->regs.cnfgB); + + /* Find out PWord size */ + switch (configa & CNFGA_ID_MASK) { + case CNFGA_ID_8: + pword = 1; + break; + case CNFGA_ID_16: + pword = 2; + break; + case CNFGA_ID_32: + pword = 4; + break; + default: + pr_probe(p, "Unknown implementation ID: 0x%0x\n", + (configa & CNFGA_ID_MASK) >> CNFGA_ID_SHIFT); + goto fail; + break; + } + if (pword != 1) { + pr_probe(p, "Unsupported PWord size: %u\n", pword); + goto fail; + } + priv->pword = pword; + pr_probe(p, "PWord is %u bits\n", 8 * priv->pword); + + /* Check for compression support */ + writeb(configb | CNFGB_COMPRESS, priv->regs.cnfgB); + if (readb(priv->regs.cnfgB) & CNFGB_COMPRESS) + pr_probe(p, "Hardware compression detected (unsupported)\n"); + writeb(configb & ~CNFGB_COMPRESS, priv->regs.cnfgB); + + /* Reset FIFO and go in test mode (no interrupt, no DMA) */ + parport_ip32_set_mode(p, ECR_MODE_TST); + + /* FIFO must be empty now */ + if (!(readb(priv->regs.ecr) & ECR_F_EMPTY)) { + pr_probe(p, "FIFO not reset\n"); + goto fail; + } + + /* Find out FIFO depth. */ + priv->fifo_depth = 0; + for (i = 0; i < 1024; i++) { + if (readb(priv->regs.ecr) & ECR_F_FULL) { + /* FIFO full */ + priv->fifo_depth = i; + break; + } + writeb((u8)i, priv->regs.fifo); + } + if (i >= 1024) { + pr_probe(p, "Can't fill FIFO\n"); + goto fail; + } + if (!priv->fifo_depth) { + pr_probe(p, "Can't get FIFO depth\n"); + goto fail; + } + pr_probe(p, "FIFO is %u PWords deep\n", priv->fifo_depth); + + /* Enable interrupts */ + parport_ip32_frob_econtrol(p, ECR_SERVINTR, 0); + + /* Find out writeIntrThreshold: number of PWords we know we can write + * if we get an interrupt. */ + priv->writeIntrThreshold = 0; + for (i = 0; i < priv->fifo_depth; i++) { + if (readb(priv->regs.fifo) != (u8)i) { + pr_probe(p, "Invalid data in FIFO\n"); + goto fail; + } + if (!priv->writeIntrThreshold + && readb(priv->regs.ecr) & ECR_SERVINTR) + /* writeIntrThreshold reached */ + priv->writeIntrThreshold = i + 1; + if (i + 1 < priv->fifo_depth + && readb(priv->regs.ecr) & ECR_F_EMPTY) { + /* FIFO empty before the last byte? */ + pr_probe(p, "Data lost in FIFO\n"); + goto fail; + } + } + if (!priv->writeIntrThreshold) { + pr_probe(p, "Can't get writeIntrThreshold\n"); + goto fail; + } + pr_probe(p, "writeIntrThreshold is %u\n", priv->writeIntrThreshold); + + /* FIFO must be empty now */ + if (!(readb(priv->regs.ecr) & ECR_F_EMPTY)) { + pr_probe(p, "Can't empty FIFO\n"); + goto fail; + } + + /* Reset FIFO */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + /* Set reverse direction (must be in PS2 mode) */ + parport_ip32_data_reverse(p); + /* Test FIFO, no interrupt, no DMA */ + parport_ip32_set_mode(p, ECR_MODE_TST); + /* Enable interrupts */ + parport_ip32_frob_econtrol(p, ECR_SERVINTR, 0); + + /* Find out readIntrThreshold: number of PWords we can read if we get + * an interrupt. */ + priv->readIntrThreshold = 0; + for (i = 0; i < priv->fifo_depth; i++) { + writeb(0xaa, priv->regs.fifo); + if (readb(priv->regs.ecr) & ECR_SERVINTR) { + /* readIntrThreshold reached */ + priv->readIntrThreshold = i + 1; + break; + } + } + if (!priv->readIntrThreshold) { + pr_probe(p, "Can't get readIntrThreshold\n"); + goto fail; + } + pr_probe(p, "readIntrThreshold is %u\n", priv->readIntrThreshold); + + /* Reset ECR */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + parport_ip32_data_forward(p); + parport_ip32_set_mode(p, ECR_MODE_SPP); + return 1; + +fail: + priv->fifo_depth = 0; + parport_ip32_set_mode(p, ECR_MODE_SPP); + return 0; +} + +/*--- Initialization code ----------------------------------------------*/ + +/** + * parport_ip32_make_isa_registers - compute (ISA) register addresses + * @regs: pointer to &struct parport_ip32_regs to fill + * @base: base address of standard and EPP registers + * @base_hi: base address of ECP registers + * @regshift: how much to shift register offset by + * + * Compute register addresses, according to the ISA standard. The addresses + * of the standard and EPP registers are computed from address @base. The + * addresses of the ECP registers are computed from address @base_hi. + */ +static void __init +parport_ip32_make_isa_registers(struct parport_ip32_regs *regs, + void __iomem *base, void __iomem *base_hi, + unsigned int regshift) +{ +#define r_base(offset) ((u8 __iomem *)base + ((offset) << regshift)) +#define r_base_hi(offset) ((u8 __iomem *)base_hi + ((offset) << regshift)) + *regs = (struct parport_ip32_regs){ + .data = r_base(0), + .dsr = r_base(1), + .dcr = r_base(2), + .eppAddr = r_base(3), + .eppData0 = r_base(4), + .eppData1 = r_base(5), + .eppData2 = r_base(6), + .eppData3 = r_base(7), + .ecpAFifo = r_base(0), + .fifo = r_base_hi(0), + .cnfgA = r_base_hi(0), + .cnfgB = r_base_hi(1), + .ecr = r_base_hi(2) + }; +#undef r_base_hi +#undef r_base +} + +/** + * parport_ip32_probe_port - probe and register IP32 built-in parallel port + * + * Returns the new allocated &parport structure. On error, an error code is + * encoded in return value with the ERR_PTR function. + */ +static __init struct parport *parport_ip32_probe_port(void) +{ + struct parport_ip32_regs regs; + struct parport_ip32_private *priv = NULL; + struct parport_operations *ops = NULL; + struct parport *p = NULL; + int err; + + parport_ip32_make_isa_registers(®s, &mace->isa.parallel, + &mace->isa.ecp1284, 8 /* regshift */); + + ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); + priv = kmalloc(sizeof(struct parport_ip32_private), GFP_KERNEL); + p = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, ops); + if (ops == NULL || priv == NULL || p == NULL) { + err = -ENOMEM; + goto fail; + } + p->base = MACE_BASE + offsetof(struct sgi_mace, isa.parallel); + p->base_hi = MACE_BASE + offsetof(struct sgi_mace, isa.ecp1284); + p->private_data = priv; + + *ops = parport_ip32_ops; + *priv = (struct parport_ip32_private){ + .regs = regs, + .dcr_writable = DCR_DIR | DCR_SELECT | DCR_nINIT | + DCR_AUTOFD | DCR_STROBE, + .irq_mode = PARPORT_IP32_IRQ_FWD, + }; + init_completion(&priv->irq_complete); + + /* Probe port. */ + if (!parport_ip32_ecp_supported(p)) { + err = -ENODEV; + goto fail; + } + parport_ip32_dump_state(p, "begin init", 0); + + /* We found what looks like a working ECR register. Simply assume + * that all modes are correctly supported. Enable basic modes. */ + p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT; + p->modes |= PARPORT_MODE_TRISTATE; + + if (!parport_ip32_fifo_supported(p)) { + printk(KERN_WARNING PPIP32 + "%s: error: FIFO disabled\n", p->name); + /* Disable hardware modes depending on a working FIFO. */ + features &= ~PARPORT_IP32_ENABLE_SPP; + features &= ~PARPORT_IP32_ENABLE_ECP; + /* DMA is not needed if FIFO is not supported. */ + features &= ~PARPORT_IP32_ENABLE_DMA; + } + + /* Request IRQ */ + if (features & PARPORT_IP32_ENABLE_IRQ) { + int irq = MACEISA_PARALLEL_IRQ; + if (request_irq(irq, parport_ip32_interrupt, 0, p->name, p)) { + printk(KERN_WARNING PPIP32 + "%s: error: IRQ disabled\n", p->name); + /* DMA cannot work without interrupts. */ + features &= ~PARPORT_IP32_ENABLE_DMA; + } else { + pr_probe(p, "Interrupt support enabled\n"); + p->irq = irq; + priv->dcr_writable |= DCR_IRQ; + } + } + + /* Allocate DMA resources */ + if (features & PARPORT_IP32_ENABLE_DMA) { + if (parport_ip32_dma_register()) + printk(KERN_WARNING PPIP32 + "%s: error: DMA disabled\n", p->name); + else { + pr_probe(p, "DMA support enabled\n"); + p->dma = 0; /* arbitrary value != PARPORT_DMA_NONE */ + p->modes |= PARPORT_MODE_DMA; + } + } + + if (features & PARPORT_IP32_ENABLE_SPP) { + /* Enable compatibility FIFO mode */ + p->ops->compat_write_data = parport_ip32_compat_write_data; + p->modes |= PARPORT_MODE_COMPAT; + pr_probe(p, "Hardware support for SPP mode enabled\n"); + } + if (features & PARPORT_IP32_ENABLE_EPP) { + /* Set up access functions to use EPP hardware. */ + p->ops->epp_read_data = parport_ip32_epp_read_data; + p->ops->epp_write_data = parport_ip32_epp_write_data; + p->ops->epp_read_addr = parport_ip32_epp_read_addr; + p->ops->epp_write_addr = parport_ip32_epp_write_addr; + p->modes |= PARPORT_MODE_EPP; + pr_probe(p, "Hardware support for EPP mode enabled\n"); + } + if (features & PARPORT_IP32_ENABLE_ECP) { + /* Enable ECP FIFO mode */ + p->ops->ecp_write_data = parport_ip32_ecp_write_data; + /* FIXME - not implemented */ +/* p->ops->ecp_read_data = parport_ip32_ecp_read_data; */ +/* p->ops->ecp_write_addr = parport_ip32_ecp_write_addr; */ + p->modes |= PARPORT_MODE_ECP; + pr_probe(p, "Hardware support for ECP mode enabled\n"); + } + + /* Initialize the port with sensible values */ + parport_ip32_set_mode(p, ECR_MODE_PS2); + parport_ip32_write_control(p, DCR_SELECT | DCR_nINIT); + parport_ip32_data_forward(p); + parport_ip32_disable_irq(p); + parport_ip32_write_data(p, 0x00); + parport_ip32_dump_state(p, "end init", 0); + + /* Print out what we found */ + printk(KERN_INFO "%s: SGI IP32 at 0x%lx (0x%lx)", + p->name, p->base, p->base_hi); + if (p->irq != PARPORT_IRQ_NONE) + printk(", irq %d", p->irq); + printk(" ["); +#define printmode(x) if (p->modes & PARPORT_MODE_##x) \ + printk("%s%s", f++ ? "," : "", #x) + { + unsigned int f = 0; + printmode(PCSPP); + printmode(TRISTATE); + printmode(COMPAT); + printmode(EPP); + printmode(ECP); + printmode(DMA); + } +#undef printmode + printk("]\n"); + + parport_announce_port(p); + return p; + +fail: + if (p) + parport_put_port(p); + kfree(priv); + kfree(ops); + return ERR_PTR(err); +} + +/** + * parport_ip32_unregister_port - unregister a parallel port + * @p: pointer to the &struct parport + * + * Unregisters a parallel port and free previously allocated resources + * (memory, IRQ, ...). + */ +static __exit void parport_ip32_unregister_port(struct parport *p) +{ + struct parport_ip32_private * const priv = p->physport->private_data; + struct parport_operations *ops = p->ops; + + parport_remove_port(p); + if (p->modes & PARPORT_MODE_DMA) + parport_ip32_dma_unregister(); + if (p->irq != PARPORT_IRQ_NONE) + free_irq(p->irq, p); + parport_put_port(p); + kfree(priv); + kfree(ops); +} + +/** + * parport_ip32_init - module initialization function + */ +static int __init parport_ip32_init(void) +{ + pr_info(PPIP32 "SGI IP32 built-in parallel port driver v0.6\n"); + this_port = parport_ip32_probe_port(); + return PTR_ERR_OR_ZERO(this_port); +} + +/** + * parport_ip32_exit - module termination function + */ +static void __exit parport_ip32_exit(void) +{ + parport_ip32_unregister_port(this_port); +} + +/*--- Module stuff -----------------------------------------------------*/ + +MODULE_AUTHOR("Arnaud Giersch <arnaud.giersch@free.fr>"); +MODULE_DESCRIPTION("SGI IP32 built-in parallel port driver"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.6"); /* update in parport_ip32_init() too */ + +module_init(parport_ip32_init); +module_exit(parport_ip32_exit); + +module_param(verbose_probing, bool, S_IRUGO); +MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialization"); + +module_param(features, uint, S_IRUGO); +MODULE_PARM_DESC(features, + "Bit mask of features to enable" + ", bit 0: IRQ support" + ", bit 1: DMA support" + ", bit 2: hardware SPP mode" + ", bit 3: hardware EPP mode" + ", bit 4: hardware ECP mode"); + +/*--- Inform (X)Emacs about preferred coding style ---------------------*/ +/* + * Local Variables: + * mode: c + * c-file-style: "linux" + * indent-tabs-mode: t + * tab-width: 8 + * fill-column: 78 + * ispell-local-dictionary: "american" + * End: + */ diff --git a/drivers/parport/parport_mfc3.c b/drivers/parport/parport_mfc3.c new file mode 100644 index 000000000..7f4be0e48 --- /dev/null +++ b/drivers/parport/parport_mfc3.c @@ -0,0 +1,370 @@ +/* Low-level parallel port routines for the Multiface 3 card + * + * Author: Joerg Dorchain <joerg@dorchain.net> + * + * (C) The elitist m68k Users(TM) + * + * based on the existing parport_amiga and lp_mfc + * + * + * From the MFC3 documentation: + * + * Miscellaneous PIA Details + * ------------------------- + * + * The two open-drain interrupt outputs /IRQA and /IRQB are routed to + * /INT2 of the Z2 bus. + * + * The CPU data bus of the PIA (D0-D7) is connected to D8-D15 on the Z2 + * bus. This means that any PIA registers are accessed at even addresses. + * + * Centronics Pin Connections for the PIA + * -------------------------------------- + * + * The following table shows the connections between the PIA and the + * Centronics interface connector. These connections implement a single, but + * very complete, Centronics type interface. The Pin column gives the pin + * numbers of the PIA. The Centronics pin numbers can be found in the section + * "Parallel Connectors". + * + * + * Pin | PIA | Dir | Centronics Names + * -------+-----+-----+--------------------------------------------------------- + * 19 | CB2 | --> | /STROBE (aka /DRDY) + * 10-17 | PBx | <-> | DATA0 - DATA7 + * 18 | CB1 | <-- | /ACK + * 40 | CA1 | <-- | BUSY + * 3 | PA1 | <-- | PAPER-OUT (aka POUT) + * 4 | PA2 | <-- | SELECTED (aka SEL) + * 9 | PA7 | --> | /INIT (aka /RESET or /INPUT-PRIME) + * 6 | PA4 | <-- | /ERROR (aka /FAULT) + * 7 | PA5 | --> | DIR (aka /SELECT-IN) + * 8 | PA6 | --> | /AUTO-FEED-XT + * 39 | CA2 | --> | open + * 5 | PA3 | <-- | /ACK (same as CB1!) + * 2 | PA0 | <-- | BUSY (same as CA1!) + * -------+-----+-----+--------------------------------------------------------- + * + * Should be enough to understand some of the driver. + * + * Per convention for normal use the port registers are visible. + * If you need the data direction registers, restore the value in the + * control register. + */ + +#include "multiface.h" +#include <linux/module.h> +#include <linux/init.h> +#include <linux/parport.h> +#include <linux/delay.h> +#include <linux/mc6821.h> +#include <linux/zorro.h> +#include <linux/interrupt.h> +#include <asm/setup.h> +#include <asm/amigahw.h> +#include <asm/irq.h> +#include <asm/amigaints.h> + +/* Maximum Number of Cards supported */ +#define MAX_MFC 5 + +#undef DEBUG +#ifdef DEBUG +#define DPRINTK printk +#else +static inline int DPRINTK(void *nothing, ...) {return 0;} +#endif + +static struct parport *this_port[MAX_MFC] = {NULL, }; +static volatile int dummy; /* for trigger readds */ + +#define pia(dev) ((struct pia *)(dev->base)) +static struct parport_operations pp_mfc3_ops; + +static void mfc3_write_data(struct parport *p, unsigned char data) +{ +DPRINTK(KERN_DEBUG "write_data %c\n",data); + + dummy = pia(p)->pprb; /* clears irq bit */ + /* Triggers also /STROBE.*/ + pia(p)->pprb = data; +} + +static unsigned char mfc3_read_data(struct parport *p) +{ + /* clears interrupt bit. Triggers also /STROBE. */ + return pia(p)->pprb; +} + +static unsigned char control_pc_to_mfc3(unsigned char control) +{ + unsigned char ret = 32|64; + + if (control & PARPORT_CONTROL_SELECT) /* XXX: What is SELECP? */ + ret &= ~32; /* /SELECT_IN */ + if (control & PARPORT_CONTROL_INIT) /* INITP */ + ret |= 128; + if (control & PARPORT_CONTROL_AUTOFD) /* AUTOLF */ + ret &= ~64; + if (control & PARPORT_CONTROL_STROBE) /* Strobe */ + /* Handled directly by hardware */; + return ret; +} + +static unsigned char control_mfc3_to_pc(unsigned char control) +{ + unsigned char ret = PARPORT_CONTROL_STROBE + | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_SELECT; + + if (control & 128) /* /INITP */ + ret |= PARPORT_CONTROL_INIT; + if (control & 64) /* /AUTOLF */ + ret &= ~PARPORT_CONTROL_AUTOFD; + if (control & 32) /* /SELECT_IN */ + ret &= ~PARPORT_CONTROL_SELECT; + return ret; +} + +static void mfc3_write_control(struct parport *p, unsigned char control) +{ +DPRINTK(KERN_DEBUG "write_control %02x\n",control); + pia(p)->ppra = (pia(p)->ppra & 0x1f) | control_pc_to_mfc3(control); +} + +static unsigned char mfc3_read_control( struct parport *p) +{ +DPRINTK(KERN_DEBUG "read_control \n"); + return control_mfc3_to_pc(pia(p)->ppra & 0xe0); +} + +static unsigned char mfc3_frob_control( struct parport *p, unsigned char mask, unsigned char val) +{ + unsigned char old; + +DPRINTK(KERN_DEBUG "frob_control mask %02x, value %02x\n",mask,val); + old = mfc3_read_control(p); + mfc3_write_control(p, (old & ~mask) ^ val); + return old; +} + +static unsigned char status_mfc3_to_pc(unsigned char status) +{ + unsigned char ret = PARPORT_STATUS_BUSY; + + if (status & 1) /* Busy */ + ret &= ~PARPORT_STATUS_BUSY; + if (status & 2) /* PaperOut */ + ret |= PARPORT_STATUS_PAPEROUT; + if (status & 4) /* Selected */ + ret |= PARPORT_STATUS_SELECT; + if (status & 8) /* Ack */ + ret |= PARPORT_STATUS_ACK; + if (status & 16) /* /ERROR */ + ret |= PARPORT_STATUS_ERROR; + + return ret; +} + +static unsigned char mfc3_read_status(struct parport *p) +{ + unsigned char status; + + status = status_mfc3_to_pc(pia(p)->ppra & 0x1f); +DPRINTK(KERN_DEBUG "read_status %02x\n", status); + return status; +} + +static int use_cnt; + +static irqreturn_t mfc3_interrupt(int irq, void *dev_id) +{ + int i; + + for( i = 0; i < MAX_MFC; i++) + if (this_port[i] != NULL) + if (pia(this_port[i])->crb & 128) { /* Board caused interrupt */ + dummy = pia(this_port[i])->pprb; /* clear irq bit */ + parport_generic_irq(this_port[i]); + } + return IRQ_HANDLED; +} + +static void mfc3_enable_irq(struct parport *p) +{ + pia(p)->crb |= PIA_C1_ENABLE_IRQ; +} + +static void mfc3_disable_irq(struct parport *p) +{ + pia(p)->crb &= ~PIA_C1_ENABLE_IRQ; +} + +static void mfc3_data_forward(struct parport *p) +{ + DPRINTK(KERN_DEBUG "forward\n"); + pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */ + pia(p)->pddrb = 255; /* all pins output */ + pia(p)->crb |= PIA_DDR; /* make data register visible - default */ +} + +static void mfc3_data_reverse(struct parport *p) +{ + DPRINTK(KERN_DEBUG "reverse\n"); + pia(p)->crb &= ~PIA_DDR; /* make data direction register visible */ + pia(p)->pddrb = 0; /* all pins input */ + pia(p)->crb |= PIA_DDR; /* make data register visible - default */ +} + +static void mfc3_init_state(struct pardevice *dev, struct parport_state *s) +{ + s->u.amiga.data = 0; + s->u.amiga.datadir = 255; + s->u.amiga.status = 0; + s->u.amiga.statusdir = 0xe0; +} + +static void mfc3_save_state(struct parport *p, struct parport_state *s) +{ + s->u.amiga.data = pia(p)->pprb; + pia(p)->crb &= ~PIA_DDR; + s->u.amiga.datadir = pia(p)->pddrb; + pia(p)->crb |= PIA_DDR; + s->u.amiga.status = pia(p)->ppra; + pia(p)->cra &= ~PIA_DDR; + s->u.amiga.statusdir = pia(p)->pddrb; + pia(p)->cra |= PIA_DDR; +} + +static void mfc3_restore_state(struct parport *p, struct parport_state *s) +{ + pia(p)->pprb = s->u.amiga.data; + pia(p)->crb &= ~PIA_DDR; + pia(p)->pddrb = s->u.amiga.datadir; + pia(p)->crb |= PIA_DDR; + pia(p)->ppra = s->u.amiga.status; + pia(p)->cra &= ~PIA_DDR; + pia(p)->pddrb = s->u.amiga.statusdir; + pia(p)->cra |= PIA_DDR; +} + +static struct parport_operations pp_mfc3_ops = { + .write_data = mfc3_write_data, + .read_data = mfc3_read_data, + + .write_control = mfc3_write_control, + .read_control = mfc3_read_control, + .frob_control = mfc3_frob_control, + + .read_status = mfc3_read_status, + + .enable_irq = mfc3_enable_irq, + .disable_irq = mfc3_disable_irq, + + .data_forward = mfc3_data_forward, + .data_reverse = mfc3_data_reverse, + + .init_state = mfc3_init_state, + .save_state = mfc3_save_state, + .restore_state = mfc3_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +/* ----------- Initialisation code --------------------------------- */ + +static int __init parport_mfc3_init(void) +{ + struct parport *p; + int pias = 0; + struct pia *pp; + struct zorro_dev *z = NULL; + + if (!MACH_IS_AMIGA) + return -ENODEV; + + while ((z = zorro_find_device(ZORRO_PROD_BSC_MULTIFACE_III, z))) { + unsigned long piabase = z->resource.start+PIABASE; + if (!request_mem_region(piabase, sizeof(struct pia), "PIA")) + continue; + + pp = ZTWO_VADDR(piabase); + pp->crb = 0; + pp->pddrb = 255; /* all data pins output */ + pp->crb = PIA_DDR|32|8; + dummy = pp->pddrb; /* reading clears interrupt */ + pp->cra = 0; + pp->pddra = 0xe0; /* /RESET, /DIR ,/AUTO-FEED output */ + pp->cra = PIA_DDR; + pp->ppra = 0; /* reset printer */ + udelay(10); + pp->ppra = 128; + p = parport_register_port((unsigned long)pp, IRQ_AMIGA_PORTS, + PARPORT_DMA_NONE, &pp_mfc3_ops); + if (!p) + goto out_port; + + if (p->irq != PARPORT_IRQ_NONE) { + if (use_cnt++ == 0) + if (request_irq(IRQ_AMIGA_PORTS, mfc3_interrupt, IRQF_SHARED, p->name, &pp_mfc3_ops)) + goto out_irq; + } + p->dev = &z->dev; + + this_port[pias++] = p; + printk(KERN_INFO "%s: Multiface III port using irq\n", p->name); + /* XXX: set operating mode */ + + p->private_data = (void *)piabase; + parport_announce_port (p); + + if (pias >= MAX_MFC) + break; + continue; + + out_irq: + parport_put_port(p); + out_port: + release_mem_region(piabase, sizeof(struct pia)); + } + + return pias ? 0 : -ENODEV; +} + +static void __exit parport_mfc3_exit(void) +{ + int i; + + for (i = 0; i < MAX_MFC; i++) { + if (!this_port[i]) + continue; + parport_remove_port(this_port[i]); + if (this_port[i]->irq != PARPORT_IRQ_NONE) { + if (--use_cnt == 0) + free_irq(IRQ_AMIGA_PORTS, &pp_mfc3_ops); + } + release_mem_region(ZTWO_PADDR(this_port[i]->private_data), sizeof(struct pia)); + parport_put_port(this_port[i]); + } +} + + +MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>"); +MODULE_DESCRIPTION("Parport Driver for Multiface 3 expansion cards Parallel Port"); +MODULE_SUPPORTED_DEVICE("Multiface 3 Parallel Port"); +MODULE_LICENSE("GPL"); + +module_init(parport_mfc3_init) +module_exit(parport_mfc3_exit) diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c new file mode 100644 index 000000000..dee5b9e35 --- /dev/null +++ b/drivers/parport/parport_pc.c @@ -0,0 +1,3361 @@ +/* Low-level parallel-port routines for 8255-based PC-style hardware. + * + * Authors: Phil Blundell <philb@gnu.org> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * David Campbell + * Andrea Arcangeli + * + * based on work by Grant Guenther <grant@torque.net> and Phil Blundell. + * + * Cleaned up include files - Russell King <linux@arm.uk.linux.org> + * DMA support - Bert De Jonghe <bert@sophis.be> + * Many ECP bugs fixed. Fred Barnes & Jamie Lokier, 1999 + * More PCI support now conditional on CONFIG_PCI, 03/2001, Paul G. + * Various hacks, Fred Barnes, 04/2001 + * Updated probing logic - Adam Belay <ambx1@neo.rr.com> + */ + +/* This driver should work with any hardware that is broadly compatible + * with that in the IBM PC. This applies to the majority of integrated + * I/O chipsets that are commonly available. The expected register + * layout is: + * + * base+0 data + * base+1 status + * base+2 control + * + * In addition, there are some optional registers: + * + * base+3 EPP address + * base+4 EPP data + * base+0x400 ECP config A + * base+0x401 ECP config B + * base+0x402 ECP control + * + * All registers are 8 bits wide and read/write. If your hardware differs + * only in register addresses (eg because your registers are on 32-bit + * word boundaries) then you can alter the constants in parport_pc.h to + * accommodate this. + * + * Note that the ECP registers may not start at offset 0x400 for PCI cards, + * but rather will start at port->base_hi. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/sched/signal.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/dma-mapping.h> +#include <linux/pci.h> +#include <linux/pnp.h> +#include <linux/platform_device.h> +#include <linux/sysctl.h> +#include <linux/io.h> +#include <linux/uaccess.h> + +#include <asm/dma.h> + +#include <linux/parport.h> +#include <linux/parport_pc.h> +#include <linux/via.h> +#include <asm/parport.h> + +#define PARPORT_PC_MAX_PORTS PARPORT_MAX + +#ifdef CONFIG_ISA_DMA_API +#define HAS_DMA +#endif + +/* ECR modes */ +#define ECR_SPP 00 +#define ECR_PS2 01 +#define ECR_PPF 02 +#define ECR_ECP 03 +#define ECR_EPP 04 +#define ECR_VND 05 +#define ECR_TST 06 +#define ECR_CNF 07 +#define ECR_MODE_MASK 0xe0 +#define ECR_WRITE(p, v) frob_econtrol((p), 0xff, (v)) + +#undef DEBUG + +#ifdef DEBUG +#define DPRINTK printk +#else +#define DPRINTK(stuff...) +#endif + + +#define NR_SUPERIOS 3 +static struct superio_struct { /* For Super-IO chips autodetection */ + int io; + int irq; + int dma; +} superios[NR_SUPERIOS] = { {0,},}; + +static int user_specified; +#if defined(CONFIG_PARPORT_PC_SUPERIO) || \ + (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO)) +static int verbose_probing; +#endif +static int pci_registered_parport; +static int pnp_registered_parport; + +/* frob_control, but for ECR */ +static void frob_econtrol(struct parport *pb, unsigned char m, + unsigned char v) +{ + unsigned char ectr = 0; + + if (m != 0xff) + ectr = inb(ECONTROL(pb)); + + DPRINTK(KERN_DEBUG "frob_econtrol(%02x,%02x): %02x -> %02x\n", + m, v, ectr, (ectr & ~m) ^ v); + + outb((ectr & ~m) ^ v, ECONTROL(pb)); +} + +static inline void frob_set_mode(struct parport *p, int mode) +{ + frob_econtrol(p, ECR_MODE_MASK, mode << 5); +} + +#ifdef CONFIG_PARPORT_PC_FIFO +/* Safely change the mode bits in the ECR + Returns: + 0 : Success + -EBUSY: Could not drain FIFO in some finite amount of time, + mode not changed! + */ +static int change_mode(struct parport *p, int m) +{ + const struct parport_pc_private *priv = p->physport->private_data; + unsigned char oecr; + int mode; + + DPRINTK(KERN_INFO "parport change_mode ECP-ISA to mode 0x%02x\n", m); + + if (!priv->ecr) { + printk(KERN_DEBUG "change_mode: but there's no ECR!\n"); + return 0; + } + + /* Bits <7:5> contain the mode. */ + oecr = inb(ECONTROL(p)); + mode = (oecr >> 5) & 0x7; + if (mode == m) + return 0; + + if (mode >= 2 && !(priv->ctr & 0x20)) { + /* This mode resets the FIFO, so we may + * have to wait for it to drain first. */ + unsigned long expire = jiffies + p->physport->cad->timeout; + int counter; + switch (mode) { + case ECR_PPF: /* Parallel Port FIFO mode */ + case ECR_ECP: /* ECP Parallel Port mode */ + /* Busy wait for 200us */ + for (counter = 0; counter < 40; counter++) { + if (inb(ECONTROL(p)) & 0x01) + break; + if (signal_pending(current)) + break; + udelay(5); + } + + /* Poll slowly. */ + while (!(inb(ECONTROL(p)) & 0x01)) { + if (time_after_eq(jiffies, expire)) + /* The FIFO is stuck. */ + return -EBUSY; + schedule_timeout_interruptible( + msecs_to_jiffies(10)); + if (signal_pending(current)) + break; + } + } + } + + if (mode >= 2 && m >= 2) { + /* We have to go through mode 001 */ + oecr &= ~(7 << 5); + oecr |= ECR_PS2 << 5; + ECR_WRITE(p, oecr); + } + + /* Set the mode. */ + oecr &= ~(7 << 5); + oecr |= m << 5; + ECR_WRITE(p, oecr); + return 0; +} +#endif /* FIFO support */ + +/* + * Clear TIMEOUT BIT in EPP MODE + * + * This is also used in SPP detection. + */ +static int clear_epp_timeout(struct parport *pb) +{ + unsigned char r; + + if (!(parport_pc_read_status(pb) & 0x01)) + return 1; + + /* To clear timeout some chips require double read */ + parport_pc_read_status(pb); + r = parport_pc_read_status(pb); + outb(r | 0x01, STATUS(pb)); /* Some reset by writing 1 */ + outb(r & 0xfe, STATUS(pb)); /* Others by writing 0 */ + r = parport_pc_read_status(pb); + + return !(r & 0x01); +} + +/* + * Access functions. + * + * Most of these aren't static because they may be used by the + * parport_xxx_yyy macros. extern __inline__ versions of several + * of these are in parport_pc.h. + */ + +static void parport_pc_init_state(struct pardevice *dev, + struct parport_state *s) +{ + s->u.pc.ctr = 0xc; + if (dev->irq_func && + dev->port->irq != PARPORT_IRQ_NONE) + /* Set ackIntEn */ + s->u.pc.ctr |= 0x10; + + s->u.pc.ecr = 0x34; /* NetMos chip can cause problems 0x24; + * D.Gruszka VScom */ +} + +static void parport_pc_save_state(struct parport *p, struct parport_state *s) +{ + const struct parport_pc_private *priv = p->physport->private_data; + s->u.pc.ctr = priv->ctr; + if (priv->ecr) + s->u.pc.ecr = inb(ECONTROL(p)); +} + +static void parport_pc_restore_state(struct parport *p, + struct parport_state *s) +{ + struct parport_pc_private *priv = p->physport->private_data; + register unsigned char c = s->u.pc.ctr & priv->ctr_writable; + outb(c, CONTROL(p)); + priv->ctr = c; + if (priv->ecr) + ECR_WRITE(p, s->u.pc.ecr); +} + +#ifdef CONFIG_PARPORT_1284 +static size_t parport_pc_epp_read_data(struct parport *port, void *buf, + size_t length, int flags) +{ + size_t got = 0; + + if (flags & PARPORT_W91284PIC) { + unsigned char status; + size_t left = length; + + /* use knowledge about data lines..: + * nFault is 0 if there is at least 1 byte in the Warp's FIFO + * pError is 1 if there are 16 bytes in the Warp's FIFO + */ + status = inb(STATUS(port)); + + while (!(status & 0x08) && got < length) { + if (left >= 16 && (status & 0x20) && !(status & 0x08)) { + /* can grab 16 bytes from warp fifo */ + if (!((long)buf & 0x03)) + insl(EPPDATA(port), buf, 4); + else + insb(EPPDATA(port), buf, 16); + buf += 16; + got += 16; + left -= 16; + } else { + /* grab single byte from the warp fifo */ + *((char *)buf) = inb(EPPDATA(port)); + buf++; + got++; + left--; + } + status = inb(STATUS(port)); + if (status & 0x01) { + /* EPP timeout should never occur... */ + printk(KERN_DEBUG +"%s: EPP timeout occurred while talking to w91284pic (should not have done)\n", port->name); + clear_epp_timeout(port); + } + } + return got; + } + if ((flags & PARPORT_EPP_FAST) && (length > 1)) { + if (!(((long)buf | length) & 0x03)) + insl(EPPDATA(port), buf, (length >> 2)); + else + insb(EPPDATA(port), buf, length); + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + return -EIO; + } + return length; + } + for (; got < length; got++) { + *((char *)buf) = inb(EPPDATA(port)); + buf++; + if (inb(STATUS(port)) & 0x01) { + /* EPP timeout */ + clear_epp_timeout(port); + break; + } + } + + return got; +} + +static size_t parport_pc_epp_write_data(struct parport *port, const void *buf, + size_t length, int flags) +{ + size_t written = 0; + + if ((flags & PARPORT_EPP_FAST) && (length > 1)) { + if (!(((long)buf | length) & 0x03)) + outsl(EPPDATA(port), buf, (length >> 2)); + else + outsb(EPPDATA(port), buf, length); + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + return -EIO; + } + return length; + } + for (; written < length; written++) { + outb(*((char *)buf), EPPDATA(port)); + buf++; + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + break; + } + } + + return written; +} + +static size_t parport_pc_epp_read_addr(struct parport *port, void *buf, + size_t length, int flags) +{ + size_t got = 0; + + if ((flags & PARPORT_EPP_FAST) && (length > 1)) { + insb(EPPADDR(port), buf, length); + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + return -EIO; + } + return length; + } + for (; got < length; got++) { + *((char *)buf) = inb(EPPADDR(port)); + buf++; + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + break; + } + } + + return got; +} + +static size_t parport_pc_epp_write_addr(struct parport *port, + const void *buf, size_t length, + int flags) +{ + size_t written = 0; + + if ((flags & PARPORT_EPP_FAST) && (length > 1)) { + outsb(EPPADDR(port), buf, length); + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + return -EIO; + } + return length; + } + for (; written < length; written++) { + outb(*((char *)buf), EPPADDR(port)); + buf++; + if (inb(STATUS(port)) & 0x01) { + clear_epp_timeout(port); + break; + } + } + + return written; +} + +static size_t parport_pc_ecpepp_read_data(struct parport *port, void *buf, + size_t length, int flags) +{ + size_t got; + + frob_set_mode(port, ECR_EPP); + parport_pc_data_reverse(port); + parport_pc_write_control(port, 0x4); + got = parport_pc_epp_read_data(port, buf, length, flags); + frob_set_mode(port, ECR_PS2); + + return got; +} + +static size_t parport_pc_ecpepp_write_data(struct parport *port, + const void *buf, size_t length, + int flags) +{ + size_t written; + + frob_set_mode(port, ECR_EPP); + parport_pc_write_control(port, 0x4); + parport_pc_data_forward(port); + written = parport_pc_epp_write_data(port, buf, length, flags); + frob_set_mode(port, ECR_PS2); + + return written; +} + +static size_t parport_pc_ecpepp_read_addr(struct parport *port, void *buf, + size_t length, int flags) +{ + size_t got; + + frob_set_mode(port, ECR_EPP); + parport_pc_data_reverse(port); + parport_pc_write_control(port, 0x4); + got = parport_pc_epp_read_addr(port, buf, length, flags); + frob_set_mode(port, ECR_PS2); + + return got; +} + +static size_t parport_pc_ecpepp_write_addr(struct parport *port, + const void *buf, size_t length, + int flags) +{ + size_t written; + + frob_set_mode(port, ECR_EPP); + parport_pc_write_control(port, 0x4); + parport_pc_data_forward(port); + written = parport_pc_epp_write_addr(port, buf, length, flags); + frob_set_mode(port, ECR_PS2); + + return written; +} +#endif /* IEEE 1284 support */ + +#ifdef CONFIG_PARPORT_PC_FIFO +static size_t parport_pc_fifo_write_block_pio(struct parport *port, + const void *buf, size_t length) +{ + int ret = 0; + const unsigned char *bufp = buf; + size_t left = length; + unsigned long expire = jiffies + port->physport->cad->timeout; + const int fifo = FIFO(port); + int poll_for = 8; /* 80 usecs */ + const struct parport_pc_private *priv = port->physport->private_data; + const int fifo_depth = priv->fifo_depth; + + port = port->physport; + + /* We don't want to be interrupted every character. */ + parport_pc_disable_irq(port); + /* set nErrIntrEn and serviceIntr */ + frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2)); + + /* Forward mode. */ + parport_pc_data_forward(port); /* Must be in PS2 mode */ + + while (left) { + unsigned char byte; + unsigned char ecrval = inb(ECONTROL(port)); + int i = 0; + + if (need_resched() && time_before(jiffies, expire)) + /* Can't yield the port. */ + schedule(); + + /* Anyone else waiting for the port? */ + if (port->waithead) { + printk(KERN_DEBUG "Somebody wants the port\n"); + break; + } + + if (ecrval & 0x02) { + /* FIFO is full. Wait for interrupt. */ + + /* Clear serviceIntr */ + ECR_WRITE(port, ecrval & ~(1<<2)); +false_alarm: + ret = parport_wait_event(port, HZ); + if (ret < 0) + break; + ret = 0; + if (!time_before(jiffies, expire)) { + /* Timed out. */ + printk(KERN_DEBUG "FIFO write timed out\n"); + break; + } + ecrval = inb(ECONTROL(port)); + if (!(ecrval & (1<<2))) { + if (need_resched() && + time_before(jiffies, expire)) + schedule(); + + goto false_alarm; + } + + continue; + } + + /* Can't fail now. */ + expire = jiffies + port->cad->timeout; + +poll: + if (signal_pending(current)) + break; + + if (ecrval & 0x01) { + /* FIFO is empty. Blast it full. */ + const int n = left < fifo_depth ? left : fifo_depth; + outsb(fifo, bufp, n); + bufp += n; + left -= n; + + /* Adjust the poll time. */ + if (i < (poll_for - 2)) + poll_for--; + continue; + } else if (i++ < poll_for) { + udelay(10); + ecrval = inb(ECONTROL(port)); + goto poll; + } + + /* Half-full(call me an optimist) */ + byte = *bufp++; + outb(byte, fifo); + left--; + } + dump_parport_state("leave fifo_write_block_pio", port); + return length - left; +} + +#ifdef HAS_DMA +static size_t parport_pc_fifo_write_block_dma(struct parport *port, + const void *buf, size_t length) +{ + int ret = 0; + unsigned long dmaflag; + size_t left = length; + const struct parport_pc_private *priv = port->physport->private_data; + struct device *dev = port->physport->dev; + dma_addr_t dma_addr, dma_handle; + size_t maxlen = 0x10000; /* max 64k per DMA transfer */ + unsigned long start = (unsigned long) buf; + unsigned long end = (unsigned long) buf + length - 1; + + dump_parport_state("enter fifo_write_block_dma", port); + if (end < MAX_DMA_ADDRESS) { + /* If it would cross a 64k boundary, cap it at the end. */ + if ((start ^ end) & ~0xffffUL) + maxlen = 0x10000 - (start & 0xffff); + + dma_addr = dma_handle = dma_map_single(dev, (void *)buf, length, + DMA_TO_DEVICE); + } else { + /* above 16 MB we use a bounce buffer as ISA-DMA + is not possible */ + maxlen = PAGE_SIZE; /* sizeof(priv->dma_buf) */ + dma_addr = priv->dma_handle; + dma_handle = 0; + } + + port = port->physport; + + /* We don't want to be interrupted every character. */ + parport_pc_disable_irq(port); + /* set nErrIntrEn and serviceIntr */ + frob_econtrol(port, (1<<4) | (1<<2), (1<<4) | (1<<2)); + + /* Forward mode. */ + parport_pc_data_forward(port); /* Must be in PS2 mode */ + + while (left) { + unsigned long expire = jiffies + port->physport->cad->timeout; + + size_t count = left; + + if (count > maxlen) + count = maxlen; + + if (!dma_handle) /* bounce buffer ! */ + memcpy(priv->dma_buf, buf, count); + + dmaflag = claim_dma_lock(); + disable_dma(port->dma); + clear_dma_ff(port->dma); + set_dma_mode(port->dma, DMA_MODE_WRITE); + set_dma_addr(port->dma, dma_addr); + set_dma_count(port->dma, count); + + /* Set DMA mode */ + frob_econtrol(port, 1<<3, 1<<3); + + /* Clear serviceIntr */ + frob_econtrol(port, 1<<2, 0); + + enable_dma(port->dma); + release_dma_lock(dmaflag); + + /* assume DMA will be successful */ + left -= count; + buf += count; + if (dma_handle) + dma_addr += count; + + /* Wait for interrupt. */ +false_alarm: + ret = parport_wait_event(port, HZ); + if (ret < 0) + break; + ret = 0; + if (!time_before(jiffies, expire)) { + /* Timed out. */ + printk(KERN_DEBUG "DMA write timed out\n"); + break; + } + /* Is serviceIntr set? */ + if (!(inb(ECONTROL(port)) & (1<<2))) { + cond_resched(); + + goto false_alarm; + } + + dmaflag = claim_dma_lock(); + disable_dma(port->dma); + clear_dma_ff(port->dma); + count = get_dma_residue(port->dma); + release_dma_lock(dmaflag); + + cond_resched(); /* Can't yield the port. */ + + /* Anyone else waiting for the port? */ + if (port->waithead) { + printk(KERN_DEBUG "Somebody wants the port\n"); + break; + } + + /* update for possible DMA residue ! */ + buf -= count; + left += count; + if (dma_handle) + dma_addr -= count; + } + + /* Maybe got here through break, so adjust for DMA residue! */ + dmaflag = claim_dma_lock(); + disable_dma(port->dma); + clear_dma_ff(port->dma); + left += get_dma_residue(port->dma); + release_dma_lock(dmaflag); + + /* Turn off DMA mode */ + frob_econtrol(port, 1<<3, 0); + + if (dma_handle) + dma_unmap_single(dev, dma_handle, length, DMA_TO_DEVICE); + + dump_parport_state("leave fifo_write_block_dma", port); + return length - left; +} +#endif + +static inline size_t parport_pc_fifo_write_block(struct parport *port, + const void *buf, size_t length) +{ +#ifdef HAS_DMA + if (port->dma != PARPORT_DMA_NONE) + return parport_pc_fifo_write_block_dma(port, buf, length); +#endif + return parport_pc_fifo_write_block_pio(port, buf, length); +} + +/* Parallel Port FIFO mode (ECP chipsets) */ +static size_t parport_pc_compat_write_block_pio(struct parport *port, + const void *buf, size_t length, + int flags) +{ + size_t written; + int r; + unsigned long expire; + const struct parport_pc_private *priv = port->physport->private_data; + + /* Special case: a timeout of zero means we cannot call schedule(). + * Also if O_NONBLOCK is set then use the default implementation. */ + if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK) + return parport_ieee1284_write_compat(port, buf, + length, flags); + + /* Set up parallel port FIFO mode.*/ + parport_pc_data_forward(port); /* Must be in PS2 mode */ + parport_pc_frob_control(port, PARPORT_CONTROL_STROBE, 0); + r = change_mode(port, ECR_PPF); /* Parallel port FIFO */ + if (r) + printk(KERN_DEBUG "%s: Warning change_mode ECR_PPF failed\n", + port->name); + + port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* Write the data to the FIFO. */ + written = parport_pc_fifo_write_block(port, buf, length); + + /* Finish up. */ + /* For some hardware we don't want to touch the mode until + * the FIFO is empty, so allow 4 seconds for each position + * in the fifo. + */ + expire = jiffies + (priv->fifo_depth * HZ * 4); + do { + /* Wait for the FIFO to empty */ + r = change_mode(port, ECR_PS2); + if (r != -EBUSY) + break; + } while (time_before(jiffies, expire)); + if (r == -EBUSY) { + + printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name); + + /* Prevent further data transfer. */ + frob_set_mode(port, ECR_TST); + + /* Adjust for the contents of the FIFO. */ + for (written -= priv->fifo_depth; ; written++) { + if (inb(ECONTROL(port)) & 0x2) { + /* Full up. */ + break; + } + outb(0, FIFO(port)); + } + + /* Reset the FIFO and return to PS2 mode. */ + frob_set_mode(port, ECR_PS2); + } + + r = parport_wait_peripheral(port, + PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY); + if (r) + printk(KERN_DEBUG + "%s: BUSY timeout (%d) in compat_write_block_pio\n", + port->name, r); + + port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +} + +/* ECP */ +#ifdef CONFIG_PARPORT_1284 +static size_t parport_pc_ecp_write_block_pio(struct parport *port, + const void *buf, size_t length, + int flags) +{ + size_t written; + int r; + unsigned long expire; + const struct parport_pc_private *priv = port->physport->private_data; + + /* Special case: a timeout of zero means we cannot call schedule(). + * Also if O_NONBLOCK is set then use the default implementation. */ + if (port->physport->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK) + return parport_ieee1284_ecp_write_data(port, buf, + length, flags); + + /* Switch to forward mode if necessary. */ + if (port->physport->ieee1284.phase != IEEE1284_PH_FWD_IDLE) { + /* Event 47: Set nInit high. */ + parport_frob_control(port, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD, + PARPORT_CONTROL_INIT + | PARPORT_CONTROL_AUTOFD); + + /* Event 49: PError goes high. */ + r = parport_wait_peripheral(port, + PARPORT_STATUS_PAPEROUT, + PARPORT_STATUS_PAPEROUT); + if (r) { + printk(KERN_DEBUG "%s: PError timeout (%d) " + "in ecp_write_block_pio\n", port->name, r); + } + } + + /* Set up ECP parallel port mode.*/ + parport_pc_data_forward(port); /* Must be in PS2 mode */ + parport_pc_frob_control(port, + PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD, + 0); + r = change_mode(port, ECR_ECP); /* ECP FIFO */ + if (r) + printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", + port->name); + port->physport->ieee1284.phase = IEEE1284_PH_FWD_DATA; + + /* Write the data to the FIFO. */ + written = parport_pc_fifo_write_block(port, buf, length); + + /* Finish up. */ + /* For some hardware we don't want to touch the mode until + * the FIFO is empty, so allow 4 seconds for each position + * in the fifo. + */ + expire = jiffies + (priv->fifo_depth * (HZ * 4)); + do { + /* Wait for the FIFO to empty */ + r = change_mode(port, ECR_PS2); + if (r != -EBUSY) + break; + } while (time_before(jiffies, expire)); + if (r == -EBUSY) { + + printk(KERN_DEBUG "%s: FIFO is stuck\n", port->name); + + /* Prevent further data transfer. */ + frob_set_mode(port, ECR_TST); + + /* Adjust for the contents of the FIFO. */ + for (written -= priv->fifo_depth; ; written++) { + if (inb(ECONTROL(port)) & 0x2) { + /* Full up. */ + break; + } + outb(0, FIFO(port)); + } + + /* Reset the FIFO and return to PS2 mode. */ + frob_set_mode(port, ECR_PS2); + + /* Host transfer recovery. */ + parport_pc_data_reverse(port); /* Must be in PS2 mode */ + udelay(5); + parport_frob_control(port, PARPORT_CONTROL_INIT, 0); + r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0); + if (r) + printk(KERN_DEBUG "%s: PE,1 timeout (%d) " + "in ecp_write_block_pio\n", port->name, r); + + parport_frob_control(port, + PARPORT_CONTROL_INIT, + PARPORT_CONTROL_INIT); + r = parport_wait_peripheral(port, + PARPORT_STATUS_PAPEROUT, + PARPORT_STATUS_PAPEROUT); + if (r) + printk(KERN_DEBUG "%s: PE,2 timeout (%d) " + "in ecp_write_block_pio\n", port->name, r); + } + + r = parport_wait_peripheral(port, + PARPORT_STATUS_BUSY, + PARPORT_STATUS_BUSY); + if (r) + printk(KERN_DEBUG + "%s: BUSY timeout (%d) in ecp_write_block_pio\n", + port->name, r); + + port->physport->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + + return written; +} +#endif /* IEEE 1284 support */ +#endif /* Allowed to use FIFO/DMA */ + + +/* + * ****************************************** + * INITIALISATION AND MODULE STUFF BELOW HERE + * ****************************************** + */ + +/* GCC is not inlining extern inline function later overwritten to non-inline, + so we use outlined_ variants here. */ +static const struct parport_operations parport_pc_ops = { + .write_data = parport_pc_write_data, + .read_data = parport_pc_read_data, + + .write_control = parport_pc_write_control, + .read_control = parport_pc_read_control, + .frob_control = parport_pc_frob_control, + + .read_status = parport_pc_read_status, + + .enable_irq = parport_pc_enable_irq, + .disable_irq = parport_pc_disable_irq, + + .data_forward = parport_pc_data_forward, + .data_reverse = parport_pc_data_reverse, + + .init_state = parport_pc_init_state, + .save_state = parport_pc_save_state, + .restore_state = parport_pc_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +#ifdef CONFIG_PARPORT_PC_SUPERIO + +static struct superio_struct *find_free_superio(void) +{ + int i; + for (i = 0; i < NR_SUPERIOS; i++) + if (superios[i].io == 0) + return &superios[i]; + return NULL; +} + + +/* Super-IO chipset detection, Winbond, SMSC */ +static void show_parconfig_smsc37c669(int io, int key) +{ + int cr1, cr4, cra, cr23, cr26, cr27; + struct superio_struct *s; + + static const char *const modes[] = { + "SPP and Bidirectional (PS/2)", + "EPP and SPP", + "ECP", + "ECP and EPP" }; + + outb(key, io); + outb(key, io); + outb(1, io); + cr1 = inb(io + 1); + outb(4, io); + cr4 = inb(io + 1); + outb(0x0a, io); + cra = inb(io + 1); + outb(0x23, io); + cr23 = inb(io + 1); + outb(0x26, io); + cr26 = inb(io + 1); + outb(0x27, io); + cr27 = inb(io + 1); + outb(0xaa, io); + + if (verbose_probing) { + printk(KERN_INFO + "SMSC 37c669 LPT Config: cr_1=0x%02x, 4=0x%02x, " + "A=0x%2x, 23=0x%02x, 26=0x%02x, 27=0x%02x\n", + cr1, cr4, cra, cr23, cr26, cr27); + + /* The documentation calls DMA and IRQ-Lines by letters, so + the board maker can/will wire them + appropriately/randomly... G=reserved H=IDE-irq, */ + printk(KERN_INFO + "SMSC LPT Config: io=0x%04x, irq=%c, dma=%c, fifo threshold=%d\n", + cr23 * 4, + (cr27 & 0x0f) ? 'A' - 1 + (cr27 & 0x0f) : '-', + (cr26 & 0x0f) ? 'A' - 1 + (cr26 & 0x0f) : '-', + cra & 0x0f); + printk(KERN_INFO "SMSC LPT Config: enabled=%s power=%s\n", + (cr23 * 4 >= 0x100) ? "yes" : "no", + (cr1 & 4) ? "yes" : "no"); + printk(KERN_INFO + "SMSC LPT Config: Port mode=%s, EPP version =%s\n", + (cr1 & 0x08) ? "Standard mode only (SPP)" + : modes[cr4 & 0x03], + (cr4 & 0x40) ? "1.7" : "1.9"); + } + + /* Heuristics ! BIOS setup for this mainboard device limits + the choices to standard settings, i.e. io-address and IRQ + are related, however DMA can be 1 or 3, assume DMA_A=DMA1, + DMA_C=DMA3 (this is true e.g. for TYAN 1564D Tomcat IV) */ + if (cr23 * 4 >= 0x100) { /* if active */ + s = find_free_superio(); + if (s == NULL) + printk(KERN_INFO "Super-IO: too many chips!\n"); + else { + int d; + switch (cr23 * 4) { + case 0x3bc: + s->io = 0x3bc; + s->irq = 7; + break; + case 0x378: + s->io = 0x378; + s->irq = 7; + break; + case 0x278: + s->io = 0x278; + s->irq = 5; + } + d = (cr26 & 0x0f); + if (d == 1 || d == 3) + s->dma = d; + else + s->dma = PARPORT_DMA_NONE; + } + } +} + + +static void show_parconfig_winbond(int io, int key) +{ + int cr30, cr60, cr61, cr70, cr74, crf0; + struct superio_struct *s; + static const char *const modes[] = { + "Standard (SPP) and Bidirectional(PS/2)", /* 0 */ + "EPP-1.9 and SPP", + "ECP", + "ECP and EPP-1.9", + "Standard (SPP)", + "EPP-1.7 and SPP", /* 5 */ + "undefined!", + "ECP and EPP-1.7" }; + static char *const irqtypes[] = { + "pulsed low, high-Z", + "follows nACK" }; + + /* The registers are called compatible-PnP because the + register layout is modelled after ISA-PnP, the access + method is just another ... */ + outb(key, io); + outb(key, io); + outb(0x07, io); /* Register 7: Select Logical Device */ + outb(0x01, io + 1); /* LD1 is Parallel Port */ + outb(0x30, io); + cr30 = inb(io + 1); + outb(0x60, io); + cr60 = inb(io + 1); + outb(0x61, io); + cr61 = inb(io + 1); + outb(0x70, io); + cr70 = inb(io + 1); + outb(0x74, io); + cr74 = inb(io + 1); + outb(0xf0, io); + crf0 = inb(io + 1); + outb(0xaa, io); + + if (verbose_probing) { + printk(KERN_INFO + "Winbond LPT Config: cr_30=%02x 60,61=%02x%02x 70=%02x 74=%02x, f0=%02x\n", + cr30, cr60, cr61, cr70, cr74, crf0); + printk(KERN_INFO "Winbond LPT Config: active=%s, io=0x%02x%02x irq=%d, ", + (cr30 & 0x01) ? "yes" : "no", cr60, cr61, cr70 & 0x0f); + if ((cr74 & 0x07) > 3) + pr_cont("dma=none\n"); + else + pr_cont("dma=%d\n", cr74 & 0x07); + printk(KERN_INFO + "Winbond LPT Config: irqtype=%s, ECP fifo threshold=%d\n", + irqtypes[crf0>>7], (crf0>>3)&0x0f); + printk(KERN_INFO "Winbond LPT Config: Port mode=%s\n", + modes[crf0 & 0x07]); + } + + if (cr30 & 0x01) { /* the settings can be interrogated later ... */ + s = find_free_superio(); + if (s == NULL) + printk(KERN_INFO "Super-IO: too many chips!\n"); + else { + s->io = (cr60 << 8) | cr61; + s->irq = cr70 & 0x0f; + s->dma = (((cr74 & 0x07) > 3) ? + PARPORT_DMA_NONE : (cr74 & 0x07)); + } + } +} + +static void decode_winbond(int efer, int key, int devid, int devrev, int oldid) +{ + const char *type = "unknown"; + int id, progif = 2; + + if (devid == devrev) + /* simple heuristics, we happened to read some + non-winbond register */ + return; + + id = (devid << 8) | devrev; + + /* Values are from public data sheets pdf files, I can just + confirm 83977TF is correct :-) */ + if (id == 0x9771) + type = "83977F/AF"; + else if (id == 0x9773) + type = "83977TF / SMSC 97w33x/97w34x"; + else if (id == 0x9774) + type = "83977ATF"; + else if ((id & ~0x0f) == 0x5270) + type = "83977CTF / SMSC 97w36x"; + else if ((id & ~0x0f) == 0x52f0) + type = "83977EF / SMSC 97w35x"; + else if ((id & ~0x0f) == 0x5210) + type = "83627"; + else if ((id & ~0x0f) == 0x6010) + type = "83697HF"; + else if ((oldid & 0x0f) == 0x0a) { + type = "83877F"; + progif = 1; + } else if ((oldid & 0x0f) == 0x0b) { + type = "83877AF"; + progif = 1; + } else if ((oldid & 0x0f) == 0x0c) { + type = "83877TF"; + progif = 1; + } else if ((oldid & 0x0f) == 0x0d) { + type = "83877ATF"; + progif = 1; + } else + progif = 0; + + if (verbose_probing) + printk(KERN_INFO "Winbond chip at EFER=0x%x key=0x%02x " + "devid=%02x devrev=%02x oldid=%02x type=%s\n", + efer, key, devid, devrev, oldid, type); + + if (progif == 2) + show_parconfig_winbond(efer, key); +} + +static void decode_smsc(int efer, int key, int devid, int devrev) +{ + const char *type = "unknown"; + void (*func)(int io, int key); + int id; + + if (devid == devrev) + /* simple heuristics, we happened to read some + non-smsc register */ + return; + + func = NULL; + id = (devid << 8) | devrev; + + if (id == 0x0302) { + type = "37c669"; + func = show_parconfig_smsc37c669; + } else if (id == 0x6582) + type = "37c665IR"; + else if (devid == 0x65) + type = "37c665GT"; + else if (devid == 0x66) + type = "37c666GT"; + + if (verbose_probing) + printk(KERN_INFO "SMSC chip at EFER=0x%x " + "key=0x%02x devid=%02x devrev=%02x type=%s\n", + efer, key, devid, devrev, type); + + if (func) + func(efer, key); +} + + +static void winbond_check(int io, int key) +{ + int origval, devid, devrev, oldid, x_devid, x_devrev, x_oldid; + + if (!request_region(io, 3, __func__)) + return; + + origval = inb(io); /* Save original value */ + + /* First probe without key */ + outb(0x20, io); + x_devid = inb(io + 1); + outb(0x21, io); + x_devrev = inb(io + 1); + outb(0x09, io); + x_oldid = inb(io + 1); + + outb(key, io); + outb(key, io); /* Write Magic Sequence to EFER, extended + function enable register */ + outb(0x20, io); /* Write EFIR, extended function index register */ + devid = inb(io + 1); /* Read EFDR, extended function data register */ + outb(0x21, io); + devrev = inb(io + 1); + outb(0x09, io); + oldid = inb(io + 1); + outb(0xaa, io); /* Magic Seal */ + + outb(origval, io); /* in case we poked some entirely different hardware */ + + if ((x_devid == devid) && (x_devrev == devrev) && (x_oldid == oldid)) + goto out; /* protection against false positives */ + + decode_winbond(io, key, devid, devrev, oldid); +out: + release_region(io, 3); +} + +static void winbond_check2(int io, int key) +{ + int origval[3], devid, devrev, oldid, x_devid, x_devrev, x_oldid; + + if (!request_region(io, 3, __func__)) + return; + + origval[0] = inb(io); /* Save original values */ + origval[1] = inb(io + 1); + origval[2] = inb(io + 2); + + /* First probe without the key */ + outb(0x20, io + 2); + x_devid = inb(io + 2); + outb(0x21, io + 1); + x_devrev = inb(io + 2); + outb(0x09, io + 1); + x_oldid = inb(io + 2); + + outb(key, io); /* Write Magic Byte to EFER, extended + function enable register */ + outb(0x20, io + 2); /* Write EFIR, extended function index register */ + devid = inb(io + 2); /* Read EFDR, extended function data register */ + outb(0x21, io + 1); + devrev = inb(io + 2); + outb(0x09, io + 1); + oldid = inb(io + 2); + outb(0xaa, io); /* Magic Seal */ + + outb(origval[0], io); /* in case we poked some entirely different hardware */ + outb(origval[1], io + 1); + outb(origval[2], io + 2); + + if (x_devid == devid && x_devrev == devrev && x_oldid == oldid) + goto out; /* protection against false positives */ + + decode_winbond(io, key, devid, devrev, oldid); +out: + release_region(io, 3); +} + +static void smsc_check(int io, int key) +{ + int origval, id, rev, oldid, oldrev, x_id, x_rev, x_oldid, x_oldrev; + + if (!request_region(io, 3, __func__)) + return; + + origval = inb(io); /* Save original value */ + + /* First probe without the key */ + outb(0x0d, io); + x_oldid = inb(io + 1); + outb(0x0e, io); + x_oldrev = inb(io + 1); + outb(0x20, io); + x_id = inb(io + 1); + outb(0x21, io); + x_rev = inb(io + 1); + + outb(key, io); + outb(key, io); /* Write Magic Sequence to EFER, extended + function enable register */ + outb(0x0d, io); /* Write EFIR, extended function index register */ + oldid = inb(io + 1); /* Read EFDR, extended function data register */ + outb(0x0e, io); + oldrev = inb(io + 1); + outb(0x20, io); + id = inb(io + 1); + outb(0x21, io); + rev = inb(io + 1); + outb(0xaa, io); /* Magic Seal */ + + outb(origval, io); /* in case we poked some entirely different hardware */ + + if (x_id == id && x_oldrev == oldrev && + x_oldid == oldid && x_rev == rev) + goto out; /* protection against false positives */ + + decode_smsc(io, key, oldid, oldrev); +out: + release_region(io, 3); +} + + +static void detect_and_report_winbond(void) +{ + if (verbose_probing) + printk(KERN_DEBUG "Winbond Super-IO detection, now testing ports 3F0,370,250,4E,2E ...\n"); + winbond_check(0x3f0, 0x87); + winbond_check(0x370, 0x87); + winbond_check(0x2e , 0x87); + winbond_check(0x4e , 0x87); + winbond_check(0x3f0, 0x86); + winbond_check2(0x250, 0x88); + winbond_check2(0x250, 0x89); +} + +static void detect_and_report_smsc(void) +{ + if (verbose_probing) + printk(KERN_DEBUG "SMSC Super-IO detection, now testing Ports 2F0, 370 ...\n"); + smsc_check(0x3f0, 0x55); + smsc_check(0x370, 0x55); + smsc_check(0x3f0, 0x44); + smsc_check(0x370, 0x44); +} + +static void detect_and_report_it87(void) +{ + u16 dev; + u8 origval, r; + if (verbose_probing) + printk(KERN_DEBUG "IT8705 Super-IO detection, now testing port 2E ...\n"); + if (!request_muxed_region(0x2e, 2, __func__)) + return; + origval = inb(0x2e); /* Save original value */ + outb(0x87, 0x2e); + outb(0x01, 0x2e); + outb(0x55, 0x2e); + outb(0x55, 0x2e); + outb(0x20, 0x2e); + dev = inb(0x2f) << 8; + outb(0x21, 0x2e); + dev |= inb(0x2f); + if (dev == 0x8712 || dev == 0x8705 || dev == 0x8715 || + dev == 0x8716 || dev == 0x8718 || dev == 0x8726) { + printk(KERN_INFO "IT%04X SuperIO detected.\n", dev); + outb(0x07, 0x2E); /* Parallel Port */ + outb(0x03, 0x2F); + outb(0xF0, 0x2E); /* BOOT 0x80 off */ + r = inb(0x2f); + outb(0xF0, 0x2E); + outb(r | 8, 0x2F); + outb(0x02, 0x2E); /* Lock */ + outb(0x02, 0x2F); + } else { + outb(origval, 0x2e); /* Oops, sorry to disturb */ + } + release_region(0x2e, 2); +} +#endif /* CONFIG_PARPORT_PC_SUPERIO */ + +static struct superio_struct *find_superio(struct parport *p) +{ + int i; + for (i = 0; i < NR_SUPERIOS; i++) + if (superios[i].io == p->base) + return &superios[i]; + return NULL; +} + +static int get_superio_dma(struct parport *p) +{ + struct superio_struct *s = find_superio(p); + if (s) + return s->dma; + return PARPORT_DMA_NONE; +} + +static int get_superio_irq(struct parport *p) +{ + struct superio_struct *s = find_superio(p); + if (s) + return s->irq; + return PARPORT_IRQ_NONE; +} + + +/* --- Mode detection ------------------------------------- */ + +/* + * Checks for port existence, all ports support SPP MODE + * Returns: + * 0 : No parallel port at this address + * PARPORT_MODE_PCSPP : SPP port detected + * (if the user specified an ioport himself, + * this shall always be the case!) + * + */ +static int parport_SPP_supported(struct parport *pb) +{ + unsigned char r, w; + + /* + * first clear an eventually pending EPP timeout + * I (sailer@ife.ee.ethz.ch) have an SMSC chipset + * that does not even respond to SPP cycles if an EPP + * timeout is pending + */ + clear_epp_timeout(pb); + + /* Do a simple read-write test to make sure the port exists. */ + w = 0xc; + outb(w, CONTROL(pb)); + + /* Is there a control register that we can read from? Some + * ports don't allow reads, so read_control just returns a + * software copy. Some ports _do_ allow reads, so bypass the + * software copy here. In addition, some bits aren't + * writable. */ + r = inb(CONTROL(pb)); + if ((r & 0xf) == w) { + w = 0xe; + outb(w, CONTROL(pb)); + r = inb(CONTROL(pb)); + outb(0xc, CONTROL(pb)); + if ((r & 0xf) == w) + return PARPORT_MODE_PCSPP; + } + + if (user_specified) + /* That didn't work, but the user thinks there's a + * port here. */ + printk(KERN_INFO "parport 0x%lx (WARNING): CTR: " + "wrote 0x%02x, read 0x%02x\n", pb->base, w, r); + + /* Try the data register. The data lines aren't tri-stated at + * this stage, so we expect back what we wrote. */ + w = 0xaa; + parport_pc_write_data(pb, w); + r = parport_pc_read_data(pb); + if (r == w) { + w = 0x55; + parport_pc_write_data(pb, w); + r = parport_pc_read_data(pb); + if (r == w) + return PARPORT_MODE_PCSPP; + } + + if (user_specified) { + /* Didn't work, but the user is convinced this is the + * place. */ + printk(KERN_INFO "parport 0x%lx (WARNING): DATA: " + "wrote 0x%02x, read 0x%02x\n", pb->base, w, r); + printk(KERN_INFO "parport 0x%lx: You gave this address, " + "but there is probably no parallel port there!\n", + pb->base); + } + + /* It's possible that we can't read the control register or + * the data register. In that case just believe the user. */ + if (user_specified) + return PARPORT_MODE_PCSPP; + + return 0; +} + +/* Check for ECR + * + * Old style XT ports alias io ports every 0x400, hence accessing ECR + * on these cards actually accesses the CTR. + * + * Modern cards don't do this but reading from ECR will return 0xff + * regardless of what is written here if the card does NOT support + * ECP. + * + * We first check to see if ECR is the same as CTR. If not, the low + * two bits of ECR aren't writable, so we check by writing ECR and + * reading it back to see if it's what we expect. + */ +static int parport_ECR_present(struct parport *pb) +{ + struct parport_pc_private *priv = pb->private_data; + unsigned char r = 0xc; + + outb(r, CONTROL(pb)); + if ((inb(ECONTROL(pb)) & 0x3) == (r & 0x3)) { + outb(r ^ 0x2, CONTROL(pb)); /* Toggle bit 1 */ + + r = inb(CONTROL(pb)); + if ((inb(ECONTROL(pb)) & 0x2) == (r & 0x2)) + goto no_reg; /* Sure that no ECR register exists */ + } + + if ((inb(ECONTROL(pb)) & 0x3) != 0x1) + goto no_reg; + + ECR_WRITE(pb, 0x34); + if (inb(ECONTROL(pb)) != 0x35) + goto no_reg; + + priv->ecr = 1; + outb(0xc, CONTROL(pb)); + + /* Go to mode 000 */ + frob_set_mode(pb, ECR_SPP); + + return 1; + + no_reg: + outb(0xc, CONTROL(pb)); + return 0; +} + +#ifdef CONFIG_PARPORT_1284 +/* Detect PS/2 support. + * + * Bit 5 (0x20) sets the PS/2 data direction; setting this high + * allows us to read data from the data lines. In theory we would get back + * 0xff but any peripheral attached to the port may drag some or all of the + * lines down to zero. So if we get back anything that isn't the contents + * of the data register we deem PS/2 support to be present. + * + * Some SPP ports have "half PS/2" ability - you can't turn off the line + * drivers, but an external peripheral with sufficiently beefy drivers of + * its own can overpower them and assert its own levels onto the bus, from + * where they can then be read back as normal. Ports with this property + * and the right type of device attached are likely to fail the SPP test, + * (as they will appear to have stuck bits) and so the fact that they might + * be misdetected here is rather academic. + */ + +static int parport_PS2_supported(struct parport *pb) +{ + int ok = 0; + + clear_epp_timeout(pb); + + /* try to tri-state the buffer */ + parport_pc_data_reverse(pb); + + parport_pc_write_data(pb, 0x55); + if (parport_pc_read_data(pb) != 0x55) + ok++; + + parport_pc_write_data(pb, 0xaa); + if (parport_pc_read_data(pb) != 0xaa) + ok++; + + /* cancel input mode */ + parport_pc_data_forward(pb); + + if (ok) { + pb->modes |= PARPORT_MODE_TRISTATE; + } else { + struct parport_pc_private *priv = pb->private_data; + priv->ctr_writable &= ~0x20; + } + + return ok; +} + +#ifdef CONFIG_PARPORT_PC_FIFO +static int parport_ECP_supported(struct parport *pb) +{ + int i; + int config, configb; + int pword; + struct parport_pc_private *priv = pb->private_data; + /* Translate ECP intrLine to ISA irq value */ + static const int intrline[] = { 0, 7, 9, 10, 11, 14, 15, 5 }; + + /* If there is no ECR, we have no hope of supporting ECP. */ + if (!priv->ecr) + return 0; + + /* Find out FIFO depth */ + ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */ + ECR_WRITE(pb, ECR_TST << 5); /* TEST FIFO */ + for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02); i++) + outb(0xaa, FIFO(pb)); + + /* + * Using LGS chipset it uses ECR register, but + * it doesn't support ECP or FIFO MODE + */ + if (i == 1024) { + ECR_WRITE(pb, ECR_SPP << 5); + return 0; + } + + priv->fifo_depth = i; + if (verbose_probing) + printk(KERN_DEBUG "0x%lx: FIFO is %d bytes\n", pb->base, i); + + /* Find out writeIntrThreshold */ + frob_econtrol(pb, 1<<2, 1<<2); + frob_econtrol(pb, 1<<2, 0); + for (i = 1; i <= priv->fifo_depth; i++) { + inb(FIFO(pb)); + udelay(50); + if (inb(ECONTROL(pb)) & (1<<2)) + break; + } + + if (i <= priv->fifo_depth) { + if (verbose_probing) + printk(KERN_DEBUG "0x%lx: writeIntrThreshold is %d\n", + pb->base, i); + } else + /* Number of bytes we know we can write if we get an + interrupt. */ + i = 0; + + priv->writeIntrThreshold = i; + + /* Find out readIntrThreshold */ + frob_set_mode(pb, ECR_PS2); /* Reset FIFO and enable PS2 */ + parport_pc_data_reverse(pb); /* Must be in PS2 mode */ + frob_set_mode(pb, ECR_TST); /* Test FIFO */ + frob_econtrol(pb, 1<<2, 1<<2); + frob_econtrol(pb, 1<<2, 0); + for (i = 1; i <= priv->fifo_depth; i++) { + outb(0xaa, FIFO(pb)); + if (inb(ECONTROL(pb)) & (1<<2)) + break; + } + + if (i <= priv->fifo_depth) { + if (verbose_probing) + printk(KERN_INFO "0x%lx: readIntrThreshold is %d\n", + pb->base, i); + } else + /* Number of bytes we can read if we get an interrupt. */ + i = 0; + + priv->readIntrThreshold = i; + + ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */ + ECR_WRITE(pb, 0xf4); /* Configuration mode */ + config = inb(CONFIGA(pb)); + pword = (config >> 4) & 0x7; + switch (pword) { + case 0: + pword = 2; + printk(KERN_WARNING "0x%lx: Unsupported pword size!\n", + pb->base); + break; + case 2: + pword = 4; + printk(KERN_WARNING "0x%lx: Unsupported pword size!\n", + pb->base); + break; + default: + printk(KERN_WARNING "0x%lx: Unknown implementation ID\n", + pb->base); + /* Assume 1 */ + case 1: + pword = 1; + } + priv->pword = pword; + + if (verbose_probing) { + printk(KERN_DEBUG "0x%lx: PWord is %d bits\n", + pb->base, 8 * pword); + + printk(KERN_DEBUG "0x%lx: Interrupts are ISA-%s\n", pb->base, + config & 0x80 ? "Level" : "Pulses"); + + configb = inb(CONFIGB(pb)); + printk(KERN_DEBUG "0x%lx: ECP port cfgA=0x%02x cfgB=0x%02x\n", + pb->base, config, configb); + printk(KERN_DEBUG "0x%lx: ECP settings irq=", pb->base); + if ((configb >> 3) & 0x07) + pr_cont("%d", intrline[(configb >> 3) & 0x07]); + else + pr_cont("<none or set by other means>"); + pr_cont(" dma="); + if ((configb & 0x03) == 0x00) + pr_cont("<none or set by other means>\n"); + else + pr_cont("%d\n", configb & 0x07); + } + + /* Go back to mode 000 */ + frob_set_mode(pb, ECR_SPP); + + return 1; +} +#endif + +#ifdef CONFIG_X86_32 +static int intel_bug_present_check_epp(struct parport *pb) +{ + const struct parport_pc_private *priv = pb->private_data; + int bug_present = 0; + + if (priv->ecr) { + /* store value of ECR */ + unsigned char ecr = inb(ECONTROL(pb)); + unsigned char i; + for (i = 0x00; i < 0x80; i += 0x20) { + ECR_WRITE(pb, i); + if (clear_epp_timeout(pb)) { + /* Phony EPP in ECP. */ + bug_present = 1; + break; + } + } + /* return ECR into the inital state */ + ECR_WRITE(pb, ecr); + } + + return bug_present; +} +static int intel_bug_present(struct parport *pb) +{ +/* Check whether the device is legacy, not PCI or PCMCIA. Only legacy is known to be affected. */ + if (pb->dev != NULL) { + return 0; + } + + return intel_bug_present_check_epp(pb); +} +#else +static int intel_bug_present(struct parport *pb) +{ + return 0; +} +#endif /* CONFIG_X86_32 */ + +static int parport_ECPPS2_supported(struct parport *pb) +{ + const struct parport_pc_private *priv = pb->private_data; + int result; + unsigned char oecr; + + if (!priv->ecr) + return 0; + + oecr = inb(ECONTROL(pb)); + ECR_WRITE(pb, ECR_PS2 << 5); + result = parport_PS2_supported(pb); + ECR_WRITE(pb, oecr); + return result; +} + +/* EPP mode detection */ + +static int parport_EPP_supported(struct parport *pb) +{ + /* + * Theory: + * Bit 0 of STR is the EPP timeout bit, this bit is 0 + * when EPP is possible and is set high when an EPP timeout + * occurs (EPP uses the HALT line to stop the CPU while it does + * the byte transfer, an EPP timeout occurs if the attached + * device fails to respond after 10 micro seconds). + * + * This bit is cleared by either reading it (National Semi) + * or writing a 1 to the bit (SMC, UMC, WinBond), others ??? + * This bit is always high in non EPP modes. + */ + + /* If EPP timeout bit clear then EPP available */ + if (!clear_epp_timeout(pb)) + return 0; /* No way to clear timeout */ + + /* Check for Intel bug. */ + if (intel_bug_present(pb)) + return 0; + + pb->modes |= PARPORT_MODE_EPP; + + /* Set up access functions to use EPP hardware. */ + pb->ops->epp_read_data = parport_pc_epp_read_data; + pb->ops->epp_write_data = parport_pc_epp_write_data; + pb->ops->epp_read_addr = parport_pc_epp_read_addr; + pb->ops->epp_write_addr = parport_pc_epp_write_addr; + + return 1; +} + +static int parport_ECPEPP_supported(struct parport *pb) +{ + struct parport_pc_private *priv = pb->private_data; + int result; + unsigned char oecr; + + if (!priv->ecr) + return 0; + + oecr = inb(ECONTROL(pb)); + /* Search for SMC style EPP+ECP mode */ + ECR_WRITE(pb, 0x80); + outb(0x04, CONTROL(pb)); + result = parport_EPP_supported(pb); + + ECR_WRITE(pb, oecr); + + if (result) { + /* Set up access functions to use ECP+EPP hardware. */ + pb->ops->epp_read_data = parport_pc_ecpepp_read_data; + pb->ops->epp_write_data = parport_pc_ecpepp_write_data; + pb->ops->epp_read_addr = parport_pc_ecpepp_read_addr; + pb->ops->epp_write_addr = parport_pc_ecpepp_write_addr; + } + + return result; +} + +#else /* No IEEE 1284 support */ + +/* Don't bother probing for modes we know we won't use. */ +static int parport_PS2_supported(struct parport *pb) { return 0; } +#ifdef CONFIG_PARPORT_PC_FIFO +static int parport_ECP_supported(struct parport *pb) +{ + return 0; +} +#endif +static int parport_EPP_supported(struct parport *pb) +{ + return 0; +} + +static int parport_ECPEPP_supported(struct parport *pb) +{ + return 0; +} + +static int parport_ECPPS2_supported(struct parport *pb) +{ + return 0; +} + +#endif /* No IEEE 1284 support */ + +/* --- IRQ detection -------------------------------------- */ + +/* Only if supports ECP mode */ +static int programmable_irq_support(struct parport *pb) +{ + int irq, intrLine; + unsigned char oecr = inb(ECONTROL(pb)); + static const int lookup[8] = { + PARPORT_IRQ_NONE, 7, 9, 10, 11, 14, 15, 5 + }; + + ECR_WRITE(pb, ECR_CNF << 5); /* Configuration MODE */ + + intrLine = (inb(CONFIGB(pb)) >> 3) & 0x07; + irq = lookup[intrLine]; + + ECR_WRITE(pb, oecr); + return irq; +} + +static int irq_probe_ECP(struct parport *pb) +{ + int i; + unsigned long irqs; + + irqs = probe_irq_on(); + + ECR_WRITE(pb, ECR_SPP << 5); /* Reset FIFO */ + ECR_WRITE(pb, (ECR_TST << 5) | 0x04); + ECR_WRITE(pb, ECR_TST << 5); + + /* If Full FIFO sure that writeIntrThreshold is generated */ + for (i = 0; i < 1024 && !(inb(ECONTROL(pb)) & 0x02) ; i++) + outb(0xaa, FIFO(pb)); + + pb->irq = probe_irq_off(irqs); + ECR_WRITE(pb, ECR_SPP << 5); + + if (pb->irq <= 0) + pb->irq = PARPORT_IRQ_NONE; + + return pb->irq; +} + +/* + * This detection seems that only works in National Semiconductors + * This doesn't work in SMC, LGS, and Winbond + */ +static int irq_probe_EPP(struct parport *pb) +{ +#ifndef ADVANCED_DETECT + return PARPORT_IRQ_NONE; +#else + int irqs; + unsigned char oecr; + + if (pb->modes & PARPORT_MODE_PCECR) + oecr = inb(ECONTROL(pb)); + + irqs = probe_irq_on(); + + if (pb->modes & PARPORT_MODE_PCECR) + frob_econtrol(pb, 0x10, 0x10); + + clear_epp_timeout(pb); + parport_pc_frob_control(pb, 0x20, 0x20); + parport_pc_frob_control(pb, 0x10, 0x10); + clear_epp_timeout(pb); + + /* Device isn't expecting an EPP read + * and generates an IRQ. + */ + parport_pc_read_epp(pb); + udelay(20); + + pb->irq = probe_irq_off(irqs); + if (pb->modes & PARPORT_MODE_PCECR) + ECR_WRITE(pb, oecr); + parport_pc_write_control(pb, 0xc); + + if (pb->irq <= 0) + pb->irq = PARPORT_IRQ_NONE; + + return pb->irq; +#endif /* Advanced detection */ +} + +static int irq_probe_SPP(struct parport *pb) +{ + /* Don't even try to do this. */ + return PARPORT_IRQ_NONE; +} + +/* We will attempt to share interrupt requests since other devices + * such as sound cards and network cards seem to like using the + * printer IRQs. + * + * When ECP is available we can autoprobe for IRQs. + * NOTE: If we can autoprobe it, we can register the IRQ. + */ +static int parport_irq_probe(struct parport *pb) +{ + struct parport_pc_private *priv = pb->private_data; + + if (priv->ecr) { + pb->irq = programmable_irq_support(pb); + + if (pb->irq == PARPORT_IRQ_NONE) + pb->irq = irq_probe_ECP(pb); + } + + if ((pb->irq == PARPORT_IRQ_NONE) && priv->ecr && + (pb->modes & PARPORT_MODE_EPP)) + pb->irq = irq_probe_EPP(pb); + + clear_epp_timeout(pb); + + if (pb->irq == PARPORT_IRQ_NONE && (pb->modes & PARPORT_MODE_EPP)) + pb->irq = irq_probe_EPP(pb); + + clear_epp_timeout(pb); + + if (pb->irq == PARPORT_IRQ_NONE) + pb->irq = irq_probe_SPP(pb); + + if (pb->irq == PARPORT_IRQ_NONE) + pb->irq = get_superio_irq(pb); + + return pb->irq; +} + +/* --- DMA detection -------------------------------------- */ + +/* Only if chipset conforms to ECP ISA Interface Standard */ +static int programmable_dma_support(struct parport *p) +{ + unsigned char oecr = inb(ECONTROL(p)); + int dma; + + frob_set_mode(p, ECR_CNF); + + dma = inb(CONFIGB(p)) & 0x07; + /* 000: Indicates jumpered 8-bit DMA if read-only. + 100: Indicates jumpered 16-bit DMA if read-only. */ + if ((dma & 0x03) == 0) + dma = PARPORT_DMA_NONE; + + ECR_WRITE(p, oecr); + return dma; +} + +static int parport_dma_probe(struct parport *p) +{ + const struct parport_pc_private *priv = p->private_data; + if (priv->ecr) /* ask ECP chipset first */ + p->dma = programmable_dma_support(p); + if (p->dma == PARPORT_DMA_NONE) { + /* ask known Super-IO chips proper, although these + claim ECP compatible, some don't report their DMA + conforming to ECP standards */ + p->dma = get_superio_dma(p); + } + + return p->dma; +} + +/* --- Initialisation code -------------------------------- */ + +static LIST_HEAD(ports_list); +static DEFINE_SPINLOCK(ports_lock); + +struct parport *parport_pc_probe_port(unsigned long int base, + unsigned long int base_hi, + int irq, int dma, + struct device *dev, + int irqflags) +{ + struct parport_pc_private *priv; + struct parport_operations *ops; + struct parport *p; + int probedirq = PARPORT_IRQ_NONE; + struct resource *base_res; + struct resource *ECR_res = NULL; + struct resource *EPP_res = NULL; + struct platform_device *pdev = NULL; + int ret; + + if (!dev) { + /* We need a physical device to attach to, but none was + * provided. Create our own. */ + pdev = platform_device_register_simple("parport_pc", + base, NULL, 0); + if (IS_ERR(pdev)) + return NULL; + dev = &pdev->dev; + + ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24)); + if (ret) { + dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n"); + dma = PARPORT_DMA_NONE; + } + } + + ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); + if (!ops) + goto out1; + + priv = kmalloc(sizeof(struct parport_pc_private), GFP_KERNEL); + if (!priv) + goto out2; + + /* a misnomer, actually - it's allocate and reserve parport number */ + p = parport_register_port(base, irq, dma, ops); + if (!p) + goto out3; + + base_res = request_region(base, 3, p->name); + if (!base_res) + goto out4; + + memcpy(ops, &parport_pc_ops, sizeof(struct parport_operations)); + priv->ctr = 0xc; + priv->ctr_writable = ~0x10; + priv->ecr = 0; + priv->fifo_depth = 0; + priv->dma_buf = NULL; + priv->dma_handle = 0; + INIT_LIST_HEAD(&priv->list); + priv->port = p; + + p->dev = dev; + p->base_hi = base_hi; + p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT; + p->private_data = priv; + + if (base_hi) { + ECR_res = request_region(base_hi, 3, p->name); + if (ECR_res) + parport_ECR_present(p); + } + + if (base != 0x3bc) { + EPP_res = request_region(base+0x3, 5, p->name); + if (EPP_res) + if (!parport_EPP_supported(p)) + parport_ECPEPP_supported(p); + } + if (!parport_SPP_supported(p)) + /* No port. */ + goto out5; + if (priv->ecr) + parport_ECPPS2_supported(p); + else + parport_PS2_supported(p); + + p->size = (p->modes & PARPORT_MODE_EPP) ? 8 : 3; + + printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base); + if (p->base_hi && priv->ecr) + printk(KERN_CONT " (0x%lx)", p->base_hi); + if (p->irq == PARPORT_IRQ_AUTO) { + p->irq = PARPORT_IRQ_NONE; + parport_irq_probe(p); + } else if (p->irq == PARPORT_IRQ_PROBEONLY) { + p->irq = PARPORT_IRQ_NONE; + parport_irq_probe(p); + probedirq = p->irq; + p->irq = PARPORT_IRQ_NONE; + } + if (p->irq != PARPORT_IRQ_NONE) { + printk(KERN_CONT ", irq %d", p->irq); + priv->ctr_writable |= 0x10; + + if (p->dma == PARPORT_DMA_AUTO) { + p->dma = PARPORT_DMA_NONE; + parport_dma_probe(p); + } + } + if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq + is mandatory (see above) */ + p->dma = PARPORT_DMA_NONE; + +#ifdef CONFIG_PARPORT_PC_FIFO + if (parport_ECP_supported(p) && + p->dma != PARPORT_DMA_NOFIFO && + priv->fifo_depth > 0 && p->irq != PARPORT_IRQ_NONE) { + p->modes |= PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; + p->ops->compat_write_data = parport_pc_compat_write_block_pio; +#ifdef CONFIG_PARPORT_1284 + p->ops->ecp_write_data = parport_pc_ecp_write_block_pio; + /* currently broken, but working on it.. (FB) */ + /* p->ops->ecp_read_data = parport_pc_ecp_read_block_pio; */ +#endif /* IEEE 1284 support */ + if (p->dma != PARPORT_DMA_NONE) { + printk(KERN_CONT ", dma %d", p->dma); + p->modes |= PARPORT_MODE_DMA; + } else + printk(KERN_CONT ", using FIFO"); + } else + /* We can't use the DMA channel after all. */ + p->dma = PARPORT_DMA_NONE; +#endif /* Allowed to use FIFO/DMA */ + + printk(KERN_CONT " ["); + +#define printmode(x) \ + {\ + if (p->modes & PARPORT_MODE_##x) {\ + printk(KERN_CONT "%s%s", f ? "," : "", #x);\ + f++;\ + } \ + } + + { + int f = 0; + printmode(PCSPP); + printmode(TRISTATE); + printmode(COMPAT) + printmode(EPP); + printmode(ECP); + printmode(DMA); + } +#undef printmode +#ifndef CONFIG_PARPORT_1284 + printk(KERN_CONT "(,...)"); +#endif /* CONFIG_PARPORT_1284 */ + printk(KERN_CONT "]\n"); + if (probedirq != PARPORT_IRQ_NONE) + printk(KERN_INFO "%s: irq %d detected\n", p->name, probedirq); + + /* If No ECP release the ports grabbed above. */ + if (ECR_res && (p->modes & PARPORT_MODE_ECP) == 0) { + release_region(base_hi, 3); + ECR_res = NULL; + } + /* Likewise for EEP ports */ + if (EPP_res && (p->modes & PARPORT_MODE_EPP) == 0) { + release_region(base+3, 5); + EPP_res = NULL; + } + if (p->irq != PARPORT_IRQ_NONE) { + if (request_irq(p->irq, parport_irq_handler, + irqflags, p->name, p)) { + printk(KERN_WARNING "%s: irq %d in use, " + "resorting to polled operation\n", + p->name, p->irq); + p->irq = PARPORT_IRQ_NONE; + p->dma = PARPORT_DMA_NONE; + } + +#ifdef CONFIG_PARPORT_PC_FIFO +#ifdef HAS_DMA + if (p->dma != PARPORT_DMA_NONE) { + if (request_dma(p->dma, p->name)) { + printk(KERN_WARNING "%s: dma %d in use, " + "resorting to PIO operation\n", + p->name, p->dma); + p->dma = PARPORT_DMA_NONE; + } else { + priv->dma_buf = + dma_alloc_coherent(dev, + PAGE_SIZE, + &priv->dma_handle, + GFP_KERNEL); + if (!priv->dma_buf) { + printk(KERN_WARNING "%s: " + "cannot get buffer for DMA, " + "resorting to PIO operation\n", + p->name); + free_dma(p->dma); + p->dma = PARPORT_DMA_NONE; + } + } + } +#endif +#endif + } + + /* Done probing. Now put the port into a sensible start-up state. */ + if (priv->ecr) + /* + * Put the ECP detected port in PS2 mode. + * Do this also for ports that have ECR but don't do ECP. + */ + ECR_WRITE(p, 0x34); + + parport_pc_write_data(p, 0); + parport_pc_data_forward(p); + + /* Now that we've told the sharing engine about the port, and + found out its characteristics, let the high-level drivers + know about it. */ + spin_lock(&ports_lock); + list_add(&priv->list, &ports_list); + spin_unlock(&ports_lock); + parport_announce_port(p); + + return p; + +out5: + if (ECR_res) + release_region(base_hi, 3); + if (EPP_res) + release_region(base+0x3, 5); + release_region(base, 3); +out4: + parport_del_port(p); +out3: + kfree(priv); +out2: + kfree(ops); +out1: + if (pdev) + platform_device_unregister(pdev); + return NULL; +} +EXPORT_SYMBOL(parport_pc_probe_port); + +void parport_pc_unregister_port(struct parport *p) +{ + struct parport_pc_private *priv = p->private_data; + struct parport_operations *ops = p->ops; + + parport_remove_port(p); + spin_lock(&ports_lock); + list_del_init(&priv->list); + spin_unlock(&ports_lock); +#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA) + if (p->dma != PARPORT_DMA_NONE) + free_dma(p->dma); +#endif + if (p->irq != PARPORT_IRQ_NONE) + free_irq(p->irq, p); + release_region(p->base, 3); + if (p->size > 3) + release_region(p->base + 3, p->size - 3); + if (p->modes & PARPORT_MODE_ECP) + release_region(p->base_hi, 3); +#if defined(CONFIG_PARPORT_PC_FIFO) && defined(HAS_DMA) + if (priv->dma_buf) + dma_free_coherent(p->physport->dev, PAGE_SIZE, + priv->dma_buf, + priv->dma_handle); +#endif + kfree(p->private_data); + parport_del_port(p); + kfree(ops); /* hope no-one cached it */ +} +EXPORT_SYMBOL(parport_pc_unregister_port); + +#ifdef CONFIG_PCI + +/* ITE support maintained by Rich Liu <richliu@poorman.org> */ +static int sio_ite_8872_probe(struct pci_dev *pdev, int autoirq, int autodma, + const struct parport_pc_via_data *via) +{ + short inta_addr[6] = { 0x2A0, 0x2C0, 0x220, 0x240, 0x1E0 }; + u32 ite8872set; + u32 ite8872_lpt, ite8872_lpthi; + u8 ite8872_irq, type; + int irq; + int i; + + DPRINTK(KERN_DEBUG "sio_ite_8872_probe()\n"); + + /* make sure which one chip */ + for (i = 0; i < 5; i++) { + if (request_region(inta_addr[i], 32, "it887x")) { + int test; + pci_write_config_dword(pdev, 0x60, + 0xe5000000 | inta_addr[i]); + pci_write_config_dword(pdev, 0x78, + 0x00000000 | inta_addr[i]); + test = inb(inta_addr[i]); + if (test != 0xff) + break; + release_region(inta_addr[i], 32); + } + } + if (i >= 5) { + printk(KERN_INFO "parport_pc: cannot find ITE8872 INTA\n"); + return 0; + } + + type = inb(inta_addr[i] + 0x18); + type &= 0x0f; + + switch (type) { + case 0x2: + printk(KERN_INFO "parport_pc: ITE8871 found (1P)\n"); + ite8872set = 0x64200000; + break; + case 0xa: + printk(KERN_INFO "parport_pc: ITE8875 found (1P)\n"); + ite8872set = 0x64200000; + break; + case 0xe: + printk(KERN_INFO "parport_pc: ITE8872 found (2S1P)\n"); + ite8872set = 0x64e00000; + break; + case 0x6: + printk(KERN_INFO "parport_pc: ITE8873 found (1S)\n"); + release_region(inta_addr[i], 32); + return 0; + case 0x8: + printk(KERN_INFO "parport_pc: ITE8874 found (2S)\n"); + release_region(inta_addr[i], 32); + return 0; + default: + printk(KERN_INFO "parport_pc: unknown ITE887x\n"); + printk(KERN_INFO "parport_pc: please mail 'lspci -nvv' " + "output to Rich.Liu@ite.com.tw\n"); + release_region(inta_addr[i], 32); + return 0; + } + + pci_read_config_byte(pdev, 0x3c, &ite8872_irq); + pci_read_config_dword(pdev, 0x1c, &ite8872_lpt); + ite8872_lpt &= 0x0000ff00; + pci_read_config_dword(pdev, 0x20, &ite8872_lpthi); + ite8872_lpthi &= 0x0000ff00; + pci_write_config_dword(pdev, 0x6c, 0xe3000000 | ite8872_lpt); + pci_write_config_dword(pdev, 0x70, 0xe3000000 | ite8872_lpthi); + pci_write_config_dword(pdev, 0x80, (ite8872_lpthi<<16) | ite8872_lpt); + /* SET SPP&EPP , Parallel Port NO DMA , Enable All Function */ + /* SET Parallel IRQ */ + pci_write_config_dword(pdev, 0x9c, + ite8872set | (ite8872_irq * 0x11111)); + + DPRINTK(KERN_DEBUG "ITE887x: The IRQ is %d.\n", ite8872_irq); + DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O port is 0x%x.\n", + ite8872_lpt); + DPRINTK(KERN_DEBUG "ITE887x: The PARALLEL I/O porthi is 0x%x.\n", + ite8872_lpthi); + + /* Let the user (or defaults) steer us away from interrupts */ + irq = ite8872_irq; + if (autoirq != PARPORT_IRQ_AUTO) + irq = PARPORT_IRQ_NONE; + + /* + * Release the resource so that parport_pc_probe_port can get it. + */ + release_region(inta_addr[i], 32); + if (parport_pc_probe_port(ite8872_lpt, ite8872_lpthi, + irq, PARPORT_DMA_NONE, &pdev->dev, 0)) { + printk(KERN_INFO + "parport_pc: ITE 8872 parallel port: io=0x%X", + ite8872_lpt); + if (irq != PARPORT_IRQ_NONE) + pr_cont(", irq=%d", irq); + pr_cont("\n"); + return 1; + } + + return 0; +} + +/* VIA 8231 support by Pavel Fedin <sonic_amiga@rambler.ru> + based on VIA 686a support code by Jeff Garzik <jgarzik@pobox.com> */ +static int parport_init_mode; + +/* Data for two known VIA chips */ +static struct parport_pc_via_data via_686a_data = { + 0x51, + 0x50, + 0x85, + 0x02, + 0xE2, + 0xF0, + 0xE6 +}; +static struct parport_pc_via_data via_8231_data = { + 0x45, + 0x44, + 0x50, + 0x04, + 0xF2, + 0xFA, + 0xF6 +}; + +static int sio_via_probe(struct pci_dev *pdev, int autoirq, int autodma, + const struct parport_pc_via_data *via) +{ + u8 tmp, tmp2, siofunc; + u8 ppcontrol = 0; + int dma, irq; + unsigned port1, port2; + unsigned have_epp = 0; + + printk(KERN_DEBUG "parport_pc: VIA 686A/8231 detected\n"); + + switch (parport_init_mode) { + case 1: + printk(KERN_DEBUG "parport_pc: setting SPP mode\n"); + siofunc = VIA_FUNCTION_PARPORT_SPP; + break; + case 2: + printk(KERN_DEBUG "parport_pc: setting PS/2 mode\n"); + siofunc = VIA_FUNCTION_PARPORT_SPP; + ppcontrol = VIA_PARPORT_BIDIR; + break; + case 3: + printk(KERN_DEBUG "parport_pc: setting EPP mode\n"); + siofunc = VIA_FUNCTION_PARPORT_EPP; + ppcontrol = VIA_PARPORT_BIDIR; + have_epp = 1; + break; + case 4: + printk(KERN_DEBUG "parport_pc: setting ECP mode\n"); + siofunc = VIA_FUNCTION_PARPORT_ECP; + ppcontrol = VIA_PARPORT_BIDIR; + break; + case 5: + printk(KERN_DEBUG "parport_pc: setting EPP+ECP mode\n"); + siofunc = VIA_FUNCTION_PARPORT_ECP; + ppcontrol = VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP; + have_epp = 1; + break; + default: + printk(KERN_DEBUG + "parport_pc: probing current configuration\n"); + siofunc = VIA_FUNCTION_PROBE; + break; + } + /* + * unlock super i/o configuration + */ + pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp); + tmp |= via->via_pci_superio_config_data; + pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp); + + /* Bits 1-0: Parallel Port Mode / Enable */ + outb(via->viacfg_function, VIA_CONFIG_INDEX); + tmp = inb(VIA_CONFIG_DATA); + /* Bit 5: EPP+ECP enable; bit 7: PS/2 bidirectional port enable */ + outb(via->viacfg_parport_control, VIA_CONFIG_INDEX); + tmp2 = inb(VIA_CONFIG_DATA); + if (siofunc == VIA_FUNCTION_PROBE) { + siofunc = tmp & VIA_FUNCTION_PARPORT_DISABLE; + ppcontrol = tmp2; + } else { + tmp &= ~VIA_FUNCTION_PARPORT_DISABLE; + tmp |= siofunc; + outb(via->viacfg_function, VIA_CONFIG_INDEX); + outb(tmp, VIA_CONFIG_DATA); + tmp2 &= ~(VIA_PARPORT_BIDIR|VIA_PARPORT_ECPEPP); + tmp2 |= ppcontrol; + outb(via->viacfg_parport_control, VIA_CONFIG_INDEX); + outb(tmp2, VIA_CONFIG_DATA); + } + + /* Parallel Port I/O Base Address, bits 9-2 */ + outb(via->viacfg_parport_base, VIA_CONFIG_INDEX); + port1 = inb(VIA_CONFIG_DATA) << 2; + + printk(KERN_DEBUG "parport_pc: Current parallel port base: 0x%X\n", + port1); + if (port1 == 0x3BC && have_epp) { + outb(via->viacfg_parport_base, VIA_CONFIG_INDEX); + outb((0x378 >> 2), VIA_CONFIG_DATA); + printk(KERN_DEBUG + "parport_pc: Parallel port base changed to 0x378\n"); + port1 = 0x378; + } + + /* + * lock super i/o configuration + */ + pci_read_config_byte(pdev, via->via_pci_superio_config_reg, &tmp); + tmp &= ~via->via_pci_superio_config_data; + pci_write_config_byte(pdev, via->via_pci_superio_config_reg, tmp); + + if (siofunc == VIA_FUNCTION_PARPORT_DISABLE) { + printk(KERN_INFO "parport_pc: VIA parallel port disabled in BIOS\n"); + return 0; + } + + /* Bits 7-4: PnP Routing for Parallel Port IRQ */ + pci_read_config_byte(pdev, via->via_pci_parport_irq_reg, &tmp); + irq = ((tmp & VIA_IRQCONTROL_PARALLEL) >> 4); + + if (siofunc == VIA_FUNCTION_PARPORT_ECP) { + /* Bits 3-2: PnP Routing for Parallel Port DMA */ + pci_read_config_byte(pdev, via->via_pci_parport_dma_reg, &tmp); + dma = ((tmp & VIA_DMACONTROL_PARALLEL) >> 2); + } else + /* if ECP not enabled, DMA is not enabled, assumed + bogus 'dma' value */ + dma = PARPORT_DMA_NONE; + + /* Let the user (or defaults) steer us away from interrupts and DMA */ + if (autoirq == PARPORT_IRQ_NONE) { + irq = PARPORT_IRQ_NONE; + dma = PARPORT_DMA_NONE; + } + if (autodma == PARPORT_DMA_NONE) + dma = PARPORT_DMA_NONE; + + switch (port1) { + case 0x3bc: + port2 = 0x7bc; break; + case 0x378: + port2 = 0x778; break; + case 0x278: + port2 = 0x678; break; + default: + printk(KERN_INFO + "parport_pc: Weird VIA parport base 0x%X, ignoring\n", + port1); + return 0; + } + + /* filter bogus IRQs */ + switch (irq) { + case 0: + case 2: + case 8: + case 13: + irq = PARPORT_IRQ_NONE; + break; + + default: /* do nothing */ + break; + } + + /* finally, do the probe with values obtained */ + if (parport_pc_probe_port(port1, port2, irq, dma, &pdev->dev, 0)) { + printk(KERN_INFO + "parport_pc: VIA parallel port: io=0x%X", port1); + if (irq != PARPORT_IRQ_NONE) + pr_cont(", irq=%d", irq); + if (dma != PARPORT_DMA_NONE) + pr_cont(", dma=%d", dma); + pr_cont("\n"); + return 1; + } + + printk(KERN_WARNING "parport_pc: Strange, can't probe VIA parallel port: io=0x%X, irq=%d, dma=%d\n", + port1, irq, dma); + return 0; +} + + +enum parport_pc_sio_types { + sio_via_686a = 0, /* Via VT82C686A motherboard Super I/O */ + sio_via_8231, /* Via VT8231 south bridge integrated Super IO */ + sio_ite_8872, + last_sio +}; + +/* each element directly indexed from enum list, above */ +static struct parport_pc_superio { + int (*probe) (struct pci_dev *pdev, int autoirq, int autodma, + const struct parport_pc_via_data *via); + const struct parport_pc_via_data *via; +} parport_pc_superio_info[] = { + { sio_via_probe, &via_686a_data, }, + { sio_via_probe, &via_8231_data, }, + { sio_ite_8872_probe, NULL, }, +}; + +enum parport_pc_pci_cards { + siig_1p_10x = last_sio, + siig_2p_10x, + siig_1p_20x, + siig_2p_20x, + lava_parallel, + lava_parallel_dual_a, + lava_parallel_dual_b, + boca_ioppar, + plx_9050, + timedia_4006a, + timedia_4014, + timedia_4008a, + timedia_4018, + timedia_9018a, + syba_2p_epp, + syba_1p_ecp, + titan_010l, + avlab_1p, + avlab_2p, + oxsemi_952, + oxsemi_954, + oxsemi_840, + oxsemi_pcie_pport, + aks_0100, + mobility_pp, + netmos_9705, + netmos_9715, + netmos_9755, + netmos_9805, + netmos_9815, + netmos_9901, + netmos_9865, + quatech_sppxp100, + wch_ch382l, +}; + + +/* each element directly indexed from enum list, above + * (but offset by last_sio) */ +static struct parport_pc_pci { + int numports; + struct { /* BAR (base address registers) numbers in the config + space header */ + int lo; + int hi; + /* -1 if not there, >6 for offset-method (max BAR is 6) */ + } addr[4]; + + /* If set, this is called immediately after pci_enable_device. + * If it returns non-zero, no probing will take place and the + * ports will not be used. */ + int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma); + + /* If set, this is called after probing for ports. If 'failed' + * is non-zero we couldn't use any of the ports. */ + void (*postinit_hook) (struct pci_dev *pdev, int failed); +} cards[] = { + /* siig_1p_10x */ { 1, { { 2, 3 }, } }, + /* siig_2p_10x */ { 2, { { 2, 3 }, { 4, 5 }, } }, + /* siig_1p_20x */ { 1, { { 0, 1 }, } }, + /* siig_2p_20x */ { 2, { { 0, 1 }, { 2, 3 }, } }, + /* lava_parallel */ { 1, { { 0, -1 }, } }, + /* lava_parallel_dual_a */ { 1, { { 0, -1 }, } }, + /* lava_parallel_dual_b */ { 1, { { 0, -1 }, } }, + /* boca_ioppar */ { 1, { { 0, -1 }, } }, + /* plx_9050 */ { 2, { { 4, -1 }, { 5, -1 }, } }, + /* timedia_4006a */ { 1, { { 0, -1 }, } }, + /* timedia_4014 */ { 2, { { 0, -1 }, { 2, -1 }, } }, + /* timedia_4008a */ { 1, { { 0, 1 }, } }, + /* timedia_4018 */ { 2, { { 0, 1 }, { 2, 3 }, } }, + /* timedia_9018a */ { 2, { { 0, 1 }, { 2, 3 }, } }, + /* SYBA uses fixed offsets in + a 1K io window */ + /* syba_2p_epp AP138B */ { 2, { { 0, 0x078 }, { 0, 0x178 }, } }, + /* syba_1p_ecp W83787 */ { 1, { { 0, 0x078 }, } }, + /* titan_010l */ { 1, { { 3, -1 }, } }, + /* avlab_1p */ { 1, { { 0, 1}, } }, + /* avlab_2p */ { 2, { { 0, 1}, { 2, 3 },} }, + /* The Oxford Semi cards are unusual: 954 doesn't support ECP, + * and 840 locks up if you write 1 to bit 2! */ + /* oxsemi_952 */ { 1, { { 0, 1 }, } }, + /* oxsemi_954 */ { 1, { { 0, -1 }, } }, + /* oxsemi_840 */ { 1, { { 0, 1 }, } }, + /* oxsemi_pcie_pport */ { 1, { { 0, 1 }, } }, + /* aks_0100 */ { 1, { { 0, -1 }, } }, + /* mobility_pp */ { 1, { { 0, 1 }, } }, + + /* The netmos entries below are untested */ + /* netmos_9705 */ { 1, { { 0, -1 }, } }, + /* netmos_9715 */ { 2, { { 0, 1 }, { 2, 3 },} }, + /* netmos_9755 */ { 2, { { 0, 1 }, { 2, 3 },} }, + /* netmos_9805 */ { 1, { { 0, 1 }, } }, + /* netmos_9815 */ { 2, { { 0, 1 }, { 2, 3 }, } }, + /* netmos_9901 */ { 1, { { 0, -1 }, } }, + /* netmos_9865 */ { 1, { { 0, -1 }, } }, + /* quatech_sppxp100 */ { 1, { { 0, 1 }, } }, + /* wch_ch382l */ { 1, { { 2, -1 }, } }, +}; + +static const struct pci_device_id parport_pc_pci_tbl[] = { + /* Super-IO onboard chips */ + { 0x1106, 0x0686, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_686a }, + { 0x1106, 0x8231, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_via_8231 }, + { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, sio_ite_8872 }, + + /* PCI cards */ + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_10x, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_10x, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1P_20x, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P_20x, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p_20x }, + { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PARALLEL, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel }, + { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_A, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_a }, + { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DUAL_PAR_B, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, lava_parallel_dual_b }, + { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_BOCA_IOPPAR, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, boca_ioppar }, + { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, + PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4014, 0, 0, plx_9050 }, + /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/ + { 0x1409, 0x7268, 0x1409, 0x0101, 0, 0, timedia_4006a }, + { 0x1409, 0x7268, 0x1409, 0x0102, 0, 0, timedia_4014 }, + { 0x1409, 0x7268, 0x1409, 0x0103, 0, 0, timedia_4008a }, + { 0x1409, 0x7268, 0x1409, 0x0104, 0, 0, timedia_4018 }, + { 0x1409, 0x7268, 0x1409, 0x9018, 0, 0, timedia_9018a }, + { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_2P_EPP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_2p_epp }, + { PCI_VENDOR_ID_SYBA, PCI_DEVICE_ID_SYBA_1P_ECP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, syba_1p_ecp }, + { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_010L, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_010l }, + /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/ + /* AFAVLAB_TK9902 */ + { 0x14db, 0x2120, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1p}, + { 0x14db, 0x2121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2p}, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952PP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_952 }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954PP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_954 }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_12PCI840, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_840 }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe840_G, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_0_G, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_G, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_U, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_PCIe952_1_GU, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, oxsemi_pcie_pport }, + { PCI_VENDOR_ID_AKS, PCI_DEVICE_ID_AKS_ALADDINCARD, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, aks_0100 }, + { 0x14f2, 0x0121, PCI_ANY_ID, PCI_ANY_ID, 0, 0, mobility_pp }, + /* NetMos communication controllers */ + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9705, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9705 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9715, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9715 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9755, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9755 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9805, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9805 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9815, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9815 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9901, + 0xA000, 0x2000, 0, 0, netmos_9901 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865, + 0xA000, 0x1000, 0, 0, netmos_9865 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9865, + 0xA000, 0x2000, 0, 0, netmos_9865 }, + /* Quatech SPPXP-100 Parallel port PCI ExpressCard */ + { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_SPPXP_100, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, quatech_sppxp100 }, + /* WCH CH382L PCI-E single parallel port card */ + { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382l }, + { 0, } /* terminate list */ +}; +MODULE_DEVICE_TABLE(pci, parport_pc_pci_tbl); + +struct pci_parport_data { + int num; + struct parport *ports[2]; +}; + +static int parport_pc_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + int err, count, n, i = id->driver_data; + struct pci_parport_data *data; + + if (i < last_sio) + /* This is an onboard Super-IO and has already been probed */ + return 0; + + /* This is a PCI card */ + i -= last_sio; + count = 0; + err = pci_enable_device(dev); + if (err) + return err; + + data = kmalloc(sizeof(struct pci_parport_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + if (cards[i].preinit_hook && + cards[i].preinit_hook(dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) { + kfree(data); + return -ENODEV; + } + + for (n = 0; n < cards[i].numports; n++) { + int lo = cards[i].addr[n].lo; + int hi = cards[i].addr[n].hi; + int irq; + unsigned long io_lo, io_hi; + io_lo = pci_resource_start(dev, lo); + io_hi = 0; + if ((hi >= 0) && (hi <= 6)) + io_hi = pci_resource_start(dev, hi); + else if (hi > 6) + io_lo += hi; /* Reinterpret the meaning of + "hi" as an offset (see SYBA + def.) */ + /* TODO: test if sharing interrupts works */ + irq = dev->irq; + if (irq == IRQ_NONE) { + printk(KERN_DEBUG + "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx)\n", + id->vendor, id->device, io_lo, io_hi); + irq = PARPORT_IRQ_NONE; + } else { + printk(KERN_DEBUG + "PCI parallel port detected: %04x:%04x, I/O at %#lx(%#lx), IRQ %d\n", + id->vendor, id->device, io_lo, io_hi, irq); + } + data->ports[count] = + parport_pc_probe_port(io_lo, io_hi, irq, + PARPORT_DMA_NONE, &dev->dev, + IRQF_SHARED); + if (data->ports[count]) + count++; + } + + data->num = count; + + if (cards[i].postinit_hook) + cards[i].postinit_hook(dev, count == 0); + + if (count) { + pci_set_drvdata(dev, data); + return 0; + } + + kfree(data); + + return -ENODEV; +} + +static void parport_pc_pci_remove(struct pci_dev *dev) +{ + struct pci_parport_data *data = pci_get_drvdata(dev); + int i; + + if (data) { + for (i = data->num - 1; i >= 0; i--) + parport_pc_unregister_port(data->ports[i]); + + kfree(data); + } +} + +static struct pci_driver parport_pc_pci_driver = { + .name = "parport_pc", + .id_table = parport_pc_pci_tbl, + .probe = parport_pc_pci_probe, + .remove = parport_pc_pci_remove, +}; + +static int __init parport_pc_init_superio(int autoirq, int autodma) +{ + const struct pci_device_id *id; + struct pci_dev *pdev = NULL; + int ret = 0; + + for_each_pci_dev(pdev) { + id = pci_match_id(parport_pc_pci_tbl, pdev); + if (id == NULL || id->driver_data >= last_sio) + continue; + + if (parport_pc_superio_info[id->driver_data].probe( + pdev, autoirq, autodma, + parport_pc_superio_info[id->driver_data].via)) { + ret++; + } + } + + return ret; /* number of devices found */ +} +#else +static struct pci_driver parport_pc_pci_driver; +static int __init parport_pc_init_superio(int autoirq, int autodma) +{ + return 0; +} +#endif /* CONFIG_PCI */ + +#ifdef CONFIG_PNP + +static const struct pnp_device_id parport_pc_pnp_tbl[] = { + /* Standard LPT Printer Port */ + {.id = "PNP0400", .driver_data = 0}, + /* ECP Printer Port */ + {.id = "PNP0401", .driver_data = 0}, + { } +}; + +MODULE_DEVICE_TABLE(pnp, parport_pc_pnp_tbl); + +static int parport_pc_pnp_probe(struct pnp_dev *dev, + const struct pnp_device_id *id) +{ + struct parport *pdata; + unsigned long io_lo, io_hi; + int dma, irq; + + if (pnp_port_valid(dev, 0) && + !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) { + io_lo = pnp_port_start(dev, 0); + } else + return -EINVAL; + + if (pnp_port_valid(dev, 1) && + !(pnp_port_flags(dev, 1) & IORESOURCE_DISABLED)) { + io_hi = pnp_port_start(dev, 1); + } else + io_hi = 0; + + if (pnp_irq_valid(dev, 0) && + !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED)) { + irq = pnp_irq(dev, 0); + } else + irq = PARPORT_IRQ_NONE; + + if (pnp_dma_valid(dev, 0) && + !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED)) { + dma = pnp_dma(dev, 0); + } else + dma = PARPORT_DMA_NONE; + + dev_info(&dev->dev, "reported by %s\n", dev->protocol->name); + pdata = parport_pc_probe_port(io_lo, io_hi, irq, dma, &dev->dev, 0); + if (pdata == NULL) + return -ENODEV; + + pnp_set_drvdata(dev, pdata); + return 0; +} + +static void parport_pc_pnp_remove(struct pnp_dev *dev) +{ + struct parport *pdata = (struct parport *)pnp_get_drvdata(dev); + if (!pdata) + return; + + parport_pc_unregister_port(pdata); +} + +/* we only need the pnp layer to activate the device, at least for now */ +static struct pnp_driver parport_pc_pnp_driver = { + .name = "parport_pc", + .id_table = parport_pc_pnp_tbl, + .probe = parport_pc_pnp_probe, + .remove = parport_pc_pnp_remove, +}; + +#else +static struct pnp_driver parport_pc_pnp_driver; +#endif /* CONFIG_PNP */ + +static int parport_pc_platform_probe(struct platform_device *pdev) +{ + /* Always succeed, the actual probing is done in + * parport_pc_probe_port(). */ + return 0; +} + +static struct platform_driver parport_pc_platform_driver = { + .driver = { + .name = "parport_pc", + }, + .probe = parport_pc_platform_probe, +}; + +/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */ +static int __attribute__((unused)) +parport_pc_find_isa_ports(int autoirq, int autodma) +{ + int count = 0; + + if (parport_pc_probe_port(0x3bc, 0x7bc, autoirq, autodma, NULL, 0)) + count++; + if (parport_pc_probe_port(0x378, 0x778, autoirq, autodma, NULL, 0)) + count++; + if (parport_pc_probe_port(0x278, 0x678, autoirq, autodma, NULL, 0)) + count++; + + return count; +} + +/* This function is called by parport_pc_init if the user didn't + * specify any ports to probe. Its job is to find some ports. Order + * is important here -- we want ISA ports to be registered first, + * followed by PCI cards (for least surprise), but before that we want + * to do chipset-specific tests for some onboard ports that we know + * about. + * + * autoirq is PARPORT_IRQ_NONE, PARPORT_IRQ_AUTO, or PARPORT_IRQ_PROBEONLY + * autodma is PARPORT_DMA_NONE or PARPORT_DMA_AUTO + */ +static void __init parport_pc_find_ports(int autoirq, int autodma) +{ + int count = 0, err; + +#ifdef CONFIG_PARPORT_PC_SUPERIO + detect_and_report_it87(); + detect_and_report_winbond(); + detect_and_report_smsc(); +#endif + + /* Onboard SuperIO chipsets that show themselves on the PCI bus. */ + count += parport_pc_init_superio(autoirq, autodma); + + /* PnP ports, skip detection if SuperIO already found them */ + if (!count) { + err = pnp_register_driver(&parport_pc_pnp_driver); + if (!err) + pnp_registered_parport = 1; + } + + /* ISA ports and whatever (see asm/parport.h). */ + parport_pc_find_nonpci_ports(autoirq, autodma); + + err = pci_register_driver(&parport_pc_pci_driver); + if (!err) + pci_registered_parport = 1; +} + +/* + * Piles of crap below pretend to be a parser for module and kernel + * parameters. Say "thank you" to whoever had come up with that + * syntax and keep in mind that code below is a cleaned up version. + */ + +static int __initdata io[PARPORT_PC_MAX_PORTS+1] = { + [0 ... PARPORT_PC_MAX_PORTS] = 0 +}; +static int __initdata io_hi[PARPORT_PC_MAX_PORTS+1] = { + [0 ... PARPORT_PC_MAX_PORTS] = PARPORT_IOHI_AUTO +}; +static int __initdata dmaval[PARPORT_PC_MAX_PORTS] = { + [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_DMA_NONE +}; +static int __initdata irqval[PARPORT_PC_MAX_PORTS] = { + [0 ... PARPORT_PC_MAX_PORTS-1] = PARPORT_IRQ_PROBEONLY +}; + +static int __init parport_parse_param(const char *s, int *val, + int automatic, int none, int nofifo) +{ + if (!s) + return 0; + if (!strncmp(s, "auto", 4)) + *val = automatic; + else if (!strncmp(s, "none", 4)) + *val = none; + else if (nofifo && !strncmp(s, "nofifo", 6)) + *val = nofifo; + else { + char *ep; + unsigned long r = simple_strtoul(s, &ep, 0); + if (ep != s) + *val = r; + else { + printk(KERN_ERR "parport: bad specifier `%s'\n", s); + return -1; + } + } + return 0; +} + +static int __init parport_parse_irq(const char *irqstr, int *val) +{ + return parport_parse_param(irqstr, val, PARPORT_IRQ_AUTO, + PARPORT_IRQ_NONE, 0); +} + +static int __init parport_parse_dma(const char *dmastr, int *val) +{ + return parport_parse_param(dmastr, val, PARPORT_DMA_AUTO, + PARPORT_DMA_NONE, PARPORT_DMA_NOFIFO); +} + +#ifdef CONFIG_PCI +static int __init parport_init_mode_setup(char *str) +{ + printk(KERN_DEBUG + "parport_pc.c: Specified parameter parport_init_mode=%s\n", str); + + if (!strcmp(str, "spp")) + parport_init_mode = 1; + if (!strcmp(str, "ps2")) + parport_init_mode = 2; + if (!strcmp(str, "epp")) + parport_init_mode = 3; + if (!strcmp(str, "ecp")) + parport_init_mode = 4; + if (!strcmp(str, "ecpepp")) + parport_init_mode = 5; + return 1; +} +#endif + +#ifdef MODULE +static char *irq[PARPORT_PC_MAX_PORTS]; +static char *dma[PARPORT_PC_MAX_PORTS]; + +MODULE_PARM_DESC(io, "Base I/O address (SPP regs)"); +module_param_hw_array(io, int, ioport, NULL, 0); +MODULE_PARM_DESC(io_hi, "Base I/O address (ECR)"); +module_param_hw_array(io_hi, int, ioport, NULL, 0); +MODULE_PARM_DESC(irq, "IRQ line"); +module_param_hw_array(irq, charp, irq, NULL, 0); +MODULE_PARM_DESC(dma, "DMA channel"); +module_param_hw_array(dma, charp, dma, NULL, 0); +#if defined(CONFIG_PARPORT_PC_SUPERIO) || \ + (defined(CONFIG_PARPORT_1284) && defined(CONFIG_PARPORT_PC_FIFO)) +MODULE_PARM_DESC(verbose_probing, "Log chit-chat during initialisation"); +module_param(verbose_probing, int, 0644); +#endif +#ifdef CONFIG_PCI +static char *init_mode; +MODULE_PARM_DESC(init_mode, + "Initialise mode for VIA VT8231 port (spp, ps2, epp, ecp or ecpepp)"); +module_param(init_mode, charp, 0); +#endif + +static int __init parse_parport_params(void) +{ + unsigned int i; + int val; + +#ifdef CONFIG_PCI + if (init_mode) + parport_init_mode_setup(init_mode); +#endif + + for (i = 0; i < PARPORT_PC_MAX_PORTS && io[i]; i++) { + if (parport_parse_irq(irq[i], &val)) + return 1; + irqval[i] = val; + if (parport_parse_dma(dma[i], &val)) + return 1; + dmaval[i] = val; + } + if (!io[0]) { + /* The user can make us use any IRQs or DMAs we find. */ + if (irq[0] && !parport_parse_irq(irq[0], &val)) + switch (val) { + case PARPORT_IRQ_NONE: + case PARPORT_IRQ_AUTO: + irqval[0] = val; + break; + default: + printk(KERN_WARNING + "parport_pc: irq specified " + "without base address. Use 'io=' " + "to specify one\n"); + } + + if (dma[0] && !parport_parse_dma(dma[0], &val)) + switch (val) { + case PARPORT_DMA_NONE: + case PARPORT_DMA_AUTO: + dmaval[0] = val; + break; + default: + printk(KERN_WARNING + "parport_pc: dma specified " + "without base address. Use 'io=' " + "to specify one\n"); + } + } + return 0; +} + +#else + +static int parport_setup_ptr __initdata; + +/* + * Acceptable parameters: + * + * parport=0 + * parport=auto + * parport=0xBASE[,IRQ[,DMA]] + * + * IRQ/DMA may be numeric or 'auto' or 'none' + */ +static int __init parport_setup(char *str) +{ + char *endptr; + char *sep; + int val; + + if (!str || !*str || (*str == '0' && !*(str+1))) { + /* Disable parport if "parport=0" in cmdline */ + io[0] = PARPORT_DISABLE; + return 1; + } + + if (!strncmp(str, "auto", 4)) { + irqval[0] = PARPORT_IRQ_AUTO; + dmaval[0] = PARPORT_DMA_AUTO; + return 1; + } + + val = simple_strtoul(str, &endptr, 0); + if (endptr == str) { + printk(KERN_WARNING "parport=%s not understood\n", str); + return 1; + } + + if (parport_setup_ptr == PARPORT_PC_MAX_PORTS) { + printk(KERN_ERR "parport=%s ignored, too many ports\n", str); + return 1; + } + + io[parport_setup_ptr] = val; + irqval[parport_setup_ptr] = PARPORT_IRQ_NONE; + dmaval[parport_setup_ptr] = PARPORT_DMA_NONE; + + sep = strchr(str, ','); + if (sep++) { + if (parport_parse_irq(sep, &val)) + return 1; + irqval[parport_setup_ptr] = val; + sep = strchr(sep, ','); + if (sep++) { + if (parport_parse_dma(sep, &val)) + return 1; + dmaval[parport_setup_ptr] = val; + } + } + parport_setup_ptr++; + return 1; +} + +static int __init parse_parport_params(void) +{ + return io[0] == PARPORT_DISABLE; +} + +__setup("parport=", parport_setup); + +/* + * Acceptable parameters: + * + * parport_init_mode=[spp|ps2|epp|ecp|ecpepp] + */ +#ifdef CONFIG_PCI +__setup("parport_init_mode=", parport_init_mode_setup); +#endif +#endif + +/* "Parser" ends here */ + +static int __init parport_pc_init(void) +{ + int err; + + if (parse_parport_params()) + return -EINVAL; + + err = platform_driver_register(&parport_pc_platform_driver); + if (err) + return err; + + if (io[0]) { + int i; + /* Only probe the ports we were given. */ + user_specified = 1; + for (i = 0; i < PARPORT_PC_MAX_PORTS; i++) { + if (!io[i]) + break; + if (io_hi[i] == PARPORT_IOHI_AUTO) + io_hi[i] = 0x400 + io[i]; + parport_pc_probe_port(io[i], io_hi[i], + irqval[i], dmaval[i], NULL, 0); + } + } else + parport_pc_find_ports(irqval[0], dmaval[0]); + + return 0; +} + +static void __exit parport_pc_exit(void) +{ + if (pci_registered_parport) + pci_unregister_driver(&parport_pc_pci_driver); + if (pnp_registered_parport) + pnp_unregister_driver(&parport_pc_pnp_driver); + platform_driver_unregister(&parport_pc_platform_driver); + + while (!list_empty(&ports_list)) { + struct parport_pc_private *priv; + struct parport *port; + struct device *dev; + priv = list_entry(ports_list.next, + struct parport_pc_private, list); + port = priv->port; + dev = port->dev; + parport_pc_unregister_port(port); + if (dev && dev->bus == &platform_bus_type) + platform_device_unregister(to_platform_device(dev)); + } +} + +MODULE_AUTHOR("Phil Blundell, Tim Waugh, others"); +MODULE_DESCRIPTION("PC-style parallel port driver"); +MODULE_LICENSE("GPL"); +module_init(parport_pc_init) +module_exit(parport_pc_exit) diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c new file mode 100644 index 000000000..461fd8a24 --- /dev/null +++ b/drivers/parport/parport_serial.c @@ -0,0 +1,701 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Support for common PCI multi-I/O cards (which is most of them) + * + * Copyright (C) 2001 Tim Waugh <twaugh@redhat.com> + * + * Multi-function PCI cards are supposed to present separate logical + * devices on the bus. A common thing to do seems to be to just use + * one logical device with lots of base address registers for both + * parallel ports and serial ports. This driver is for dealing with + * that. + */ + +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/parport_pc.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/types.h> + +#include <linux/8250_pci.h> + +enum parport_pc_pci_cards { + titan_110l = 0, + titan_210l, + netmos_9xx5_combo, + netmos_9855, + netmos_9855_2p, + netmos_9900, + netmos_9900_2p, + netmos_99xx_1p, + avlab_1s1p, + avlab_1s2p, + avlab_2s1p, + siig_1s1p_10x, + siig_2s1p_10x, + siig_2p1s_20x, + siig_1s1p_20x, + siig_2s1p_20x, + timedia_4078a, + timedia_4079h, + timedia_4085h, + timedia_4088a, + timedia_4089a, + timedia_4095a, + timedia_4096a, + timedia_4078u, + timedia_4079a, + timedia_4085u, + timedia_4079r, + timedia_4079s, + timedia_4079d, + timedia_4079e, + timedia_4079f, + timedia_9079a, + timedia_9079b, + timedia_9079c, + wch_ch353_1s1p, + wch_ch353_2s1p, + wch_ch382_0s1p, + wch_ch382_2s1p, + brainboxes_5s1p, + sunix_2s1p, +}; + +/* each element directly indexed from enum list, above */ +struct parport_pc_pci { + int numports; + struct { /* BAR (base address registers) numbers in the config + space header */ + int lo; + int hi; /* -1 if not there, >6 for offset-method (max + BAR is 6) */ + } addr[4]; + + /* If set, this is called immediately after pci_enable_device. + * If it returns non-zero, no probing will take place and the + * ports will not be used. */ + int (*preinit_hook) (struct pci_dev *pdev, struct parport_pc_pci *card, + int autoirq, int autodma); + + /* If set, this is called after probing for ports. If 'failed' + * is non-zero we couldn't use any of the ports. */ + void (*postinit_hook) (struct pci_dev *pdev, + struct parport_pc_pci *card, int failed); +}; + +static int netmos_parallel_init(struct pci_dev *dev, struct parport_pc_pci *par, + int autoirq, int autodma) +{ + /* the rule described below doesn't hold for this device */ + if (dev->device == PCI_DEVICE_ID_NETMOS_9835 && + dev->subsystem_vendor == PCI_VENDOR_ID_IBM && + dev->subsystem_device == 0x0299) + return -ENODEV; + + if (dev->device == PCI_DEVICE_ID_NETMOS_9912) { + par->numports = 1; + } else { + /* + * Netmos uses the subdevice ID to indicate the number of parallel + * and serial ports. The form is 0x00PS, where <P> is the number of + * parallel ports and <S> is the number of serial ports. + */ + par->numports = (dev->subsystem_device & 0xf0) >> 4; + if (par->numports > ARRAY_SIZE(par->addr)) + par->numports = ARRAY_SIZE(par->addr); + } + + return 0; +} + +static struct parport_pc_pci cards[] = { + /* titan_110l */ { 1, { { 3, -1 }, } }, + /* titan_210l */ { 1, { { 3, -1 }, } }, + /* netmos_9xx5_combo */ { 1, { { 2, -1 }, }, netmos_parallel_init }, + /* netmos_9855 */ { 1, { { 0, -1 }, }, netmos_parallel_init }, + /* netmos_9855_2p */ { 2, { { 0, -1 }, { 2, -1 }, } }, + /* netmos_9900 */ {1, { { 3, 4 }, }, netmos_parallel_init }, + /* netmos_9900_2p */ {2, { { 0, 1 }, { 3, 4 }, } }, + /* netmos_99xx_1p */ {1, { { 0, 1 }, } }, + /* avlab_1s1p */ { 1, { { 1, 2}, } }, + /* avlab_1s2p */ { 2, { { 1, 2}, { 3, 4 },} }, + /* avlab_2s1p */ { 1, { { 2, 3}, } }, + /* siig_1s1p_10x */ { 1, { { 3, 4 }, } }, + /* siig_2s1p_10x */ { 1, { { 4, 5 }, } }, + /* siig_2p1s_20x */ { 2, { { 1, 2 }, { 3, 4 }, } }, + /* siig_1s1p_20x */ { 1, { { 1, 2 }, } }, + /* siig_2s1p_20x */ { 1, { { 2, 3 }, } }, + /* timedia_4078a */ { 1, { { 2, -1 }, } }, + /* timedia_4079h */ { 1, { { 2, 3 }, } }, + /* timedia_4085h */ { 2, { { 2, -1 }, { 4, -1 }, } }, + /* timedia_4088a */ { 2, { { 2, 3 }, { 4, 5 }, } }, + /* timedia_4089a */ { 2, { { 2, 3 }, { 4, 5 }, } }, + /* timedia_4095a */ { 2, { { 2, 3 }, { 4, 5 }, } }, + /* timedia_4096a */ { 2, { { 2, 3 }, { 4, 5 }, } }, + /* timedia_4078u */ { 1, { { 2, -1 }, } }, + /* timedia_4079a */ { 1, { { 2, 3 }, } }, + /* timedia_4085u */ { 2, { { 2, -1 }, { 4, -1 }, } }, + /* timedia_4079r */ { 1, { { 2, 3 }, } }, + /* timedia_4079s */ { 1, { { 2, 3 }, } }, + /* timedia_4079d */ { 1, { { 2, 3 }, } }, + /* timedia_4079e */ { 1, { { 2, 3 }, } }, + /* timedia_4079f */ { 1, { { 2, 3 }, } }, + /* timedia_9079a */ { 1, { { 2, 3 }, } }, + /* timedia_9079b */ { 1, { { 2, 3 }, } }, + /* timedia_9079c */ { 1, { { 2, 3 }, } }, + /* wch_ch353_1s1p*/ { 1, { { 1, -1}, } }, + /* wch_ch353_2s1p*/ { 1, { { 2, -1}, } }, + /* wch_ch382_0s1p*/ { 1, { { 2, -1}, } }, + /* wch_ch382_2s1p*/ { 1, { { 2, -1}, } }, + /* brainboxes_5s1p */ { 1, { { 3, -1 }, } }, + /* sunix_2s1p */ { 1, { { 3, -1 }, } }, +}; + +static struct pci_device_id parport_serial_pci_tbl[] = { + /* PCI cards */ + { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_110L, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_110l }, + { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_210L, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_210l }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9735, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9745, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9835, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9845, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9xx5_combo }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9855, + 0x1000, 0x0020, 0, 0, netmos_9855_2p }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9855, + 0x1000, 0x0022, 0, 0, netmos_9855_2p }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9855, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, netmos_9855 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900, + 0xA000, 0x3011, 0, 0, netmos_9900 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900, + 0xA000, 0x3012, 0, 0, netmos_9900 }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900, + 0xA000, 0x3020, 0, 0, netmos_9900_2p }, + { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9912, + 0xA000, 0x2000, 0, 0, netmos_99xx_1p }, + /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/ + { PCI_VENDOR_ID_AFAVLAB, 0x2110, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2111, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2112, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2140, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2141, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2142, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2160, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2161, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p }, + { PCI_VENDOR_ID_AFAVLAB, 0x2162, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_550, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_650, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_850, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_550, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_650, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_850, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_550, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_650, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_850, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_550, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_650, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_850, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_550, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_650, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x }, + { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_850, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x }, + /* PCI_VENDOR_ID_TIMEDIA/SUNIX has many differing cards ...*/ + { 0x1409, 0x7168, 0x1409, 0x4078, 0, 0, timedia_4078a }, + { 0x1409, 0x7168, 0x1409, 0x4079, 0, 0, timedia_4079h }, + { 0x1409, 0x7168, 0x1409, 0x4085, 0, 0, timedia_4085h }, + { 0x1409, 0x7168, 0x1409, 0x4088, 0, 0, timedia_4088a }, + { 0x1409, 0x7168, 0x1409, 0x4089, 0, 0, timedia_4089a }, + { 0x1409, 0x7168, 0x1409, 0x4095, 0, 0, timedia_4095a }, + { 0x1409, 0x7168, 0x1409, 0x4096, 0, 0, timedia_4096a }, + { 0x1409, 0x7168, 0x1409, 0x5078, 0, 0, timedia_4078u }, + { 0x1409, 0x7168, 0x1409, 0x5079, 0, 0, timedia_4079a }, + { 0x1409, 0x7168, 0x1409, 0x5085, 0, 0, timedia_4085u }, + { 0x1409, 0x7168, 0x1409, 0x6079, 0, 0, timedia_4079r }, + { 0x1409, 0x7168, 0x1409, 0x7079, 0, 0, timedia_4079s }, + { 0x1409, 0x7168, 0x1409, 0x8079, 0, 0, timedia_4079d }, + { 0x1409, 0x7168, 0x1409, 0x9079, 0, 0, timedia_4079e }, + { 0x1409, 0x7168, 0x1409, 0xa079, 0, 0, timedia_4079f }, + { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a }, + { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b }, + { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c }, + + /* WCH CARDS */ + { 0x4348, 0x5053, PCI_ANY_ID, PCI_ANY_ID, 0, 0, wch_ch353_1s1p}, + { 0x4348, 0x7053, 0x4348, 0x3253, 0, 0, wch_ch353_2s1p}, + { 0x1c00, 0x3050, 0x1c00, 0x3050, 0, 0, wch_ch382_0s1p}, + { 0x1c00, 0x3250, 0x1c00, 0x3250, 0, 0, wch_ch382_2s1p}, + + /* BrainBoxes PX272/PX306 MIO card */ + { PCI_VENDOR_ID_INTASHIELD, 0x4100, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, brainboxes_5s1p }, + + /* + * More SUNIX variations. At least one of these has part number + * '5079A but subdevice 0x102. That board reports 0x0708 as + * its PCI Class. + */ + { PCI_VENDOR_ID_SUNIX, PCI_DEVICE_ID_SUNIX_1999, PCI_VENDOR_ID_SUNIX, + 0x0102, 0, 0, sunix_2s1p }, + + { 0, } /* terminate list */ +}; +MODULE_DEVICE_TABLE(pci,parport_serial_pci_tbl); + +/* + * This table describes the serial "geometry" of these boards. Any + * quirks for these can be found in drivers/serial/8250_pci.c + * + * Cards not tested are marked n/t + * If you have one of these cards and it works for you, please tell me.. + */ +static struct pciserial_board pci_parport_serial_boards[] = { + [titan_110l] = { + .flags = FL_BASE1 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [titan_210l] = { + .flags = FL_BASE1 | FL_BASE_BARS, + .num_ports = 2, + .base_baud = 921600, + .uart_offset = 8, + }, + [netmos_9xx5_combo] = { + .flags = FL_BASE0 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [netmos_9855] = { + .flags = FL_BASE2 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [netmos_9855_2p] = { + .flags = FL_BASE4 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [netmos_9900] = { /* n/t */ + .flags = FL_BASE0 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [netmos_9900_2p] = { /* parallel only */ /* n/t */ + .flags = FL_BASE0, + .num_ports = 0, + .base_baud = 115200, + .uart_offset = 8, + }, + [netmos_99xx_1p] = { /* parallel only */ /* n/t */ + .flags = FL_BASE0, + .num_ports = 0, + .base_baud = 115200, + .uart_offset = 8, + }, + [avlab_1s1p] = { /* n/t */ + .flags = FL_BASE0 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [avlab_1s2p] = { /* n/t */ + .flags = FL_BASE0 | FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [avlab_2s1p] = { /* n/t */ + .flags = FL_BASE0 | FL_BASE_BARS, + .num_ports = 2, + .base_baud = 115200, + .uart_offset = 8, + }, + [siig_1s1p_10x] = { + .flags = FL_BASE2, + .num_ports = 1, + .base_baud = 460800, + .uart_offset = 8, + }, + [siig_2s1p_10x] = { + .flags = FL_BASE2, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [siig_2p1s_20x] = { + .flags = FL_BASE0, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [siig_1s1p_20x] = { + .flags = FL_BASE0, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [siig_2s1p_20x] = { + .flags = FL_BASE0, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4078a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079h] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4085h] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4088a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4089a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4095a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4096a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4078u] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4085u] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079r] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079s] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079d] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079e] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_4079f] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_9079a] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_9079b] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [timedia_9079c] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 921600, + .uart_offset = 8, + }, + [wch_ch353_1s1p] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 1, + .base_baud = 115200, + .uart_offset = 8, + }, + [wch_ch353_2s1p] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 2, + .base_baud = 115200, + .uart_offset = 8, + }, + [wch_ch382_0s1p] = { + .flags = FL_BASE0, + .num_ports = 0, + .base_baud = 115200, + .uart_offset = 8, + }, + [wch_ch382_2s1p] = { + .flags = FL_BASE0, + .num_ports = 2, + .base_baud = 115200, + .uart_offset = 8, + .first_offset = 0xC0, + }, + [brainboxes_5s1p] = { + .flags = FL_BASE2, + .num_ports = 5, + .base_baud = 921600, + .uart_offset = 8, + }, + [sunix_2s1p] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 2, + .base_baud = 921600, + .uart_offset = 8, + }, +}; + +struct parport_serial_private { + struct serial_private *serial; + int num_par; + struct parport *port[PARPORT_MAX]; + struct parport_pc_pci par; +}; + +/* Register the serial port(s) of a PCI card. */ +static int serial_register(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct parport_serial_private *priv = pci_get_drvdata (dev); + struct pciserial_board *board; + struct serial_private *serial; + + board = &pci_parport_serial_boards[id->driver_data]; + if (board->num_ports == 0) + return 0; + + serial = pciserial_init_ports(dev, board); + if (IS_ERR(serial)) + return PTR_ERR(serial); + + priv->serial = serial; + return 0; +} + +/* Register the parallel port(s) of a PCI card. */ +static int parport_register(struct pci_dev *dev, const struct pci_device_id *id) +{ + struct parport_pc_pci *card; + struct parport_serial_private *priv = pci_get_drvdata (dev); + int n, success = 0; + + priv->par = cards[id->driver_data]; + card = &priv->par; + if (card->preinit_hook && + card->preinit_hook (dev, card, PARPORT_IRQ_NONE, PARPORT_DMA_NONE)) + return -ENODEV; + + for (n = 0; n < card->numports; n++) { + struct parport *port; + int lo = card->addr[n].lo; + int hi = card->addr[n].hi; + unsigned long io_lo, io_hi; + int irq; + + if (priv->num_par == ARRAY_SIZE (priv->port)) { + dev_warn(&dev->dev, + "only %zu parallel ports supported (%d reported)\n", + ARRAY_SIZE(priv->port), card->numports); + break; + } + + io_lo = pci_resource_start (dev, lo); + io_hi = 0; + if ((hi >= 0) && (hi <= 6)) + io_hi = pci_resource_start (dev, hi); + else if (hi > 6) + io_lo += hi; /* Reinterpret the meaning of + "hi" as an offset (see SYBA + def.) */ + /* TODO: test if sharing interrupts works */ + irq = dev->irq; + if (irq == IRQ_NONE) { + dev_dbg(&dev->dev, + "PCI parallel port detected: I/O at %#lx(%#lx)\n", + io_lo, io_hi); + irq = PARPORT_IRQ_NONE; + } else { + dev_dbg(&dev->dev, + "PCI parallel port detected: I/O at %#lx(%#lx), IRQ %d\n", + io_lo, io_hi, irq); + } + port = parport_pc_probe_port (io_lo, io_hi, irq, + PARPORT_DMA_NONE, &dev->dev, IRQF_SHARED); + if (port) { + priv->port[priv->num_par++] = port; + success = 1; + } + } + + if (card->postinit_hook) + card->postinit_hook (dev, card, !success); + + return 0; +} + +static int parport_serial_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + struct parport_serial_private *priv; + int err; + + priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + pci_set_drvdata (dev, priv); + + err = pcim_enable_device(dev); + if (err) + return err; + + err = parport_register(dev, id); + if (err) + return err; + + err = serial_register(dev, id); + if (err) { + int i; + for (i = 0; i < priv->num_par; i++) + parport_pc_unregister_port (priv->port[i]); + return err; + } + + return 0; +} + +static void parport_serial_pci_remove(struct pci_dev *dev) +{ + struct parport_serial_private *priv = pci_get_drvdata (dev); + int i; + + // Serial ports + if (priv->serial) + pciserial_remove_ports(priv->serial); + + // Parallel ports + for (i = 0; i < priv->num_par; i++) + parport_pc_unregister_port (priv->port[i]); + + return; +} + +static int __maybe_unused parport_serial_pci_suspend(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct parport_serial_private *priv = pci_get_drvdata(pdev); + + if (priv->serial) + pciserial_suspend_ports(priv->serial); + + /* FIXME: What about parport? */ + return 0; +} + +static int __maybe_unused parport_serial_pci_resume(struct device *dev) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct parport_serial_private *priv = pci_get_drvdata(pdev); + + if (priv->serial) + pciserial_resume_ports(priv->serial); + + /* FIXME: What about parport? */ + return 0; +} + +static SIMPLE_DEV_PM_OPS(parport_serial_pm_ops, + parport_serial_pci_suspend, parport_serial_pci_resume); + +static struct pci_driver parport_serial_pci_driver = { + .name = "parport_serial", + .id_table = parport_serial_pci_tbl, + .probe = parport_serial_pci_probe, + .remove = parport_serial_pci_remove, + .driver = { + .pm = &parport_serial_pm_ops, + }, +}; +module_pci_driver(parport_serial_pci_driver); + +MODULE_AUTHOR("Tim Waugh <twaugh@redhat.com>"); +MODULE_DESCRIPTION("Driver for common parallel+serial multi-I/O PCI cards"); +MODULE_LICENSE("GPL"); diff --git a/drivers/parport/parport_sunbpp.c b/drivers/parport/parport_sunbpp.c new file mode 100644 index 000000000..8de329546 --- /dev/null +++ b/drivers/parport/parport_sunbpp.c @@ -0,0 +1,381 @@ +/* parport_sunbpp.c: Parallel-port routines for SBUS + * + * Author: Derrick J. Brashear <shadow@dementia.org> + * + * based on work by: + * Phil Blundell <philb@gnu.org> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * David Campbell <campbell@tirian.che.curtin.edu.au> + * Grant Guenther <grant@torque.net> + * Eddie C. Dost <ecd@skynet.be> + * Stephen Williams (steve@icarus.com) + * Gus Baldauf (gbaldauf@ix.netcom.com) + * Peter Zaitcev + * Tom Dyas + * + * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net> + * + */ + +#include <linux/string.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include <linux/parport.h> + +#include <asm/ptrace.h> +#include <linux/interrupt.h> + +#include <asm/io.h> +#include <asm/oplib.h> /* OpenProm Library */ +#include <asm/dma.h> /* BPP uses LSI 64854 for DMA */ +#include <asm/irq.h> +#include <asm/sunbpp.h> + +#undef __SUNBPP_DEBUG +#ifdef __SUNBPP_DEBUG +#define dprintk(x) printk x +#else +#define dprintk(x) +#endif + +static void parport_sunbpp_disable_irq(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + u32 tmp; + + tmp = sbus_readl(®s->p_csr); + tmp &= ~DMA_INT_ENAB; + sbus_writel(tmp, ®s->p_csr); +} + +static void parport_sunbpp_enable_irq(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + u32 tmp; + + tmp = sbus_readl(®s->p_csr); + tmp |= DMA_INT_ENAB; + sbus_writel(tmp, ®s->p_csr); +} + +static void parport_sunbpp_write_data(struct parport *p, unsigned char d) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + + sbus_writeb(d, ®s->p_dr); + dprintk((KERN_DEBUG "wrote 0x%x\n", d)); +} + +static unsigned char parport_sunbpp_read_data(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + + return sbus_readb(®s->p_dr); +} + +static unsigned char status_sunbpp_to_pc(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + unsigned char bits = 0; + unsigned char value_tcr = sbus_readb(®s->p_tcr); + unsigned char value_ir = sbus_readb(®s->p_ir); + + if (!(value_ir & P_IR_ERR)) + bits |= PARPORT_STATUS_ERROR; + if (!(value_ir & P_IR_SLCT)) + bits |= PARPORT_STATUS_SELECT; + if (!(value_ir & P_IR_PE)) + bits |= PARPORT_STATUS_PAPEROUT; + if (value_tcr & P_TCR_ACK) + bits |= PARPORT_STATUS_ACK; + if (!(value_tcr & P_TCR_BUSY)) + bits |= PARPORT_STATUS_BUSY; + + dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir)); + dprintk((KERN_DEBUG "read status 0x%x\n", bits)); + return bits; +} + +static unsigned char control_sunbpp_to_pc(struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + unsigned char bits = 0; + unsigned char value_tcr = sbus_readb(®s->p_tcr); + unsigned char value_or = sbus_readb(®s->p_or); + + if (!(value_tcr & P_TCR_DS)) + bits |= PARPORT_CONTROL_STROBE; + if (!(value_or & P_OR_AFXN)) + bits |= PARPORT_CONTROL_AUTOFD; + if (!(value_or & P_OR_INIT)) + bits |= PARPORT_CONTROL_INIT; + if (value_or & P_OR_SLCT_IN) + bits |= PARPORT_CONTROL_SELECT; + + dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or)); + dprintk((KERN_DEBUG "read control 0x%x\n", bits)); + return bits; +} + +static unsigned char parport_sunbpp_read_control(struct parport *p) +{ + return control_sunbpp_to_pc(p); +} + +static unsigned char parport_sunbpp_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + unsigned char value_tcr = sbus_readb(®s->p_tcr); + unsigned char value_or = sbus_readb(®s->p_or); + + dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", + value_tcr, value_or)); + if (mask & PARPORT_CONTROL_STROBE) { + if (val & PARPORT_CONTROL_STROBE) { + value_tcr &= ~P_TCR_DS; + } else { + value_tcr |= P_TCR_DS; + } + } + if (mask & PARPORT_CONTROL_AUTOFD) { + if (val & PARPORT_CONTROL_AUTOFD) { + value_or &= ~P_OR_AFXN; + } else { + value_or |= P_OR_AFXN; + } + } + if (mask & PARPORT_CONTROL_INIT) { + if (val & PARPORT_CONTROL_INIT) { + value_or &= ~P_OR_INIT; + } else { + value_or |= P_OR_INIT; + } + } + if (mask & PARPORT_CONTROL_SELECT) { + if (val & PARPORT_CONTROL_SELECT) { + value_or |= P_OR_SLCT_IN; + } else { + value_or &= ~P_OR_SLCT_IN; + } + } + + sbus_writeb(value_or, ®s->p_or); + sbus_writeb(value_tcr, ®s->p_tcr); + dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", + value_tcr, value_or)); + return parport_sunbpp_read_control(p); +} + +static void parport_sunbpp_write_control(struct parport *p, unsigned char d) +{ + const unsigned char wm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + + parport_sunbpp_frob_control (p, wm, d & wm); +} + +static unsigned char parport_sunbpp_read_status(struct parport *p) +{ + return status_sunbpp_to_pc(p); +} + +static void parport_sunbpp_data_forward (struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + unsigned char value_tcr = sbus_readb(®s->p_tcr); + + dprintk((KERN_DEBUG "forward\n")); + value_tcr &= ~P_TCR_DIR; + sbus_writeb(value_tcr, ®s->p_tcr); +} + +static void parport_sunbpp_data_reverse (struct parport *p) +{ + struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; + u8 val = sbus_readb(®s->p_tcr); + + dprintk((KERN_DEBUG "reverse\n")); + val |= P_TCR_DIR; + sbus_writeb(val, ®s->p_tcr); +} + +static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s) +{ + s->u.pc.ctr = 0xc; + s->u.pc.ecr = 0x0; +} + +static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s) +{ + s->u.pc.ctr = parport_sunbpp_read_control(p); +} + +static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s) +{ + parport_sunbpp_write_control(p, s->u.pc.ctr); +} + +static struct parport_operations parport_sunbpp_ops = +{ + .write_data = parport_sunbpp_write_data, + .read_data = parport_sunbpp_read_data, + + .write_control = parport_sunbpp_write_control, + .read_control = parport_sunbpp_read_control, + .frob_control = parport_sunbpp_frob_control, + + .read_status = parport_sunbpp_read_status, + + .enable_irq = parport_sunbpp_enable_irq, + .disable_irq = parport_sunbpp_disable_irq, + + .data_forward = parport_sunbpp_data_forward, + .data_reverse = parport_sunbpp_data_reverse, + + .init_state = parport_sunbpp_init_state, + .save_state = parport_sunbpp_save_state, + .restore_state = parport_sunbpp_restore_state, + + .epp_write_data = parport_ieee1284_epp_write_data, + .epp_read_data = parport_ieee1284_epp_read_data, + .epp_write_addr = parport_ieee1284_epp_write_addr, + .epp_read_addr = parport_ieee1284_epp_read_addr, + + .ecp_write_data = parport_ieee1284_ecp_write_data, + .ecp_read_data = parport_ieee1284_ecp_read_data, + .ecp_write_addr = parport_ieee1284_ecp_write_addr, + + .compat_write_data = parport_ieee1284_write_compat, + .nibble_read_data = parport_ieee1284_read_nibble, + .byte_read_data = parport_ieee1284_read_byte, + + .owner = THIS_MODULE, +}; + +static int bpp_probe(struct platform_device *op) +{ + struct parport_operations *ops; + struct bpp_regs __iomem *regs; + int irq, dma, err = 0, size; + unsigned char value_tcr; + void __iomem *base; + struct parport *p; + + irq = op->archdata.irqs[0]; + base = of_ioremap(&op->resource[0], 0, + resource_size(&op->resource[0]), + "sunbpp"); + if (!base) + return -ENODEV; + + size = resource_size(&op->resource[0]); + dma = PARPORT_DMA_NONE; + + ops = kmemdup(&parport_sunbpp_ops, sizeof(struct parport_operations), + GFP_KERNEL); + if (!ops) { + err = -ENOMEM; + goto out_unmap; + } + + dprintk(("register_port\n")); + if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) { + err = -ENOMEM; + goto out_free_ops; + } + + p->size = size; + p->dev = &op->dev; + + if ((err = request_irq(p->irq, parport_irq_handler, + IRQF_SHARED, p->name, p)) != 0) { + goto out_put_port; + } + + parport_sunbpp_enable_irq(p); + + regs = (struct bpp_regs __iomem *)p->base; + + value_tcr = sbus_readb(®s->p_tcr); + value_tcr &= ~P_TCR_DIR; + sbus_writeb(value_tcr, ®s->p_tcr); + + printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base); + + dev_set_drvdata(&op->dev, p); + + parport_announce_port(p); + + return 0; + +out_put_port: + parport_put_port(p); + +out_free_ops: + kfree(ops); + +out_unmap: + of_iounmap(&op->resource[0], base, size); + + return err; +} + +static int bpp_remove(struct platform_device *op) +{ + struct parport *p = dev_get_drvdata(&op->dev); + struct parport_operations *ops = p->ops; + + parport_remove_port(p); + + if (p->irq != PARPORT_IRQ_NONE) { + parport_sunbpp_disable_irq(p); + free_irq(p->irq, p); + } + + of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size); + parport_put_port(p); + kfree(ops); + + dev_set_drvdata(&op->dev, NULL); + + return 0; +} + +static const struct of_device_id bpp_match[] = { + { + .name = "SUNW,bpp", + }, + {}, +}; + +MODULE_DEVICE_TABLE(of, bpp_match); + +static struct platform_driver bpp_sbus_driver = { + .driver = { + .name = "bpp", + .of_match_table = bpp_match, + }, + .probe = bpp_probe, + .remove = bpp_remove, +}; + +module_platform_driver(bpp_sbus_driver); + +MODULE_AUTHOR("Derrick J Brashear"); +MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port"); +MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port"); +MODULE_VERSION("2.0"); +MODULE_LICENSE("GPL"); diff --git a/drivers/parport/probe.c b/drivers/parport/probe.c new file mode 100644 index 000000000..e035174ba --- /dev/null +++ b/drivers/parport/probe.c @@ -0,0 +1,283 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Parallel port device probing code + * + * Authors: Carsten Gross, carsten@sol.wohnheim.uni-ulm.de + * Philip Blundell <philb@gnu.org> + */ + +#include <linux/module.h> +#include <linux/parport.h> +#include <linux/ctype.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +static const struct { + const char *token; + const char *descr; +} classes[] = { + { "", "Legacy device" }, + { "PRINTER", "Printer" }, + { "MODEM", "Modem" }, + { "NET", "Network device" }, + { "HDC", "Hard disk" }, + { "PCMCIA", "PCMCIA" }, + { "MEDIA", "Multimedia device" }, + { "FDC", "Floppy disk" }, + { "PORTS", "Ports" }, + { "SCANNER", "Scanner" }, + { "DIGICAM", "Digital camera" }, + { "", "Unknown device" }, + { "", "Unspecified" }, + { "SCSIADAPTER", "SCSI adapter" }, + { NULL, NULL } +}; + +static void pretty_print(struct parport *port, int device) +{ + struct parport_device_info *info = &port->probe_info[device + 1]; + + printk(KERN_INFO "%s", port->name); + + if (device >= 0) + printk (" (addr %d)", device); + + printk (": %s", classes[info->class].descr); + if (info->class) + printk(", %s %s", info->mfr, info->model); + + printk("\n"); +} + +static void parse_data(struct parport *port, int device, char *str) +{ + char *txt = kmalloc(strlen(str)+1, GFP_KERNEL); + char *p = txt, *q; + int guessed_class = PARPORT_CLASS_UNSPEC; + struct parport_device_info *info = &port->probe_info[device + 1]; + + if (!txt) { + printk(KERN_WARNING "%s probe: memory squeeze\n", port->name); + return; + } + strcpy(txt, str); + while (p) { + char *sep; + q = strchr(p, ';'); + if (q) *q = 0; + sep = strchr(p, ':'); + if (sep) { + char *u; + *(sep++) = 0; + /* Get rid of trailing blanks */ + u = sep + strlen (sep) - 1; + while (u >= p && *u == ' ') + *u-- = '\0'; + u = p; + while (*u) { + *u = toupper(*u); + u++; + } + if (!strcmp(p, "MFG") || !strcmp(p, "MANUFACTURER")) { + kfree(info->mfr); + info->mfr = kstrdup(sep, GFP_KERNEL); + } else if (!strcmp(p, "MDL") || !strcmp(p, "MODEL")) { + kfree(info->model); + info->model = kstrdup(sep, GFP_KERNEL); + } else if (!strcmp(p, "CLS") || !strcmp(p, "CLASS")) { + int i; + + kfree(info->class_name); + info->class_name = kstrdup(sep, GFP_KERNEL); + for (u = sep; *u; u++) + *u = toupper(*u); + for (i = 0; classes[i].token; i++) { + if (!strcmp(classes[i].token, sep)) { + info->class = i; + goto rock_on; + } + } + printk(KERN_WARNING "%s probe: warning, class '%s' not understood.\n", port->name, sep); + info->class = PARPORT_CLASS_OTHER; + } else if (!strcmp(p, "CMD") || + !strcmp(p, "COMMAND SET")) { + kfree(info->cmdset); + info->cmdset = kstrdup(sep, GFP_KERNEL); + /* if it speaks printer language, it's + probably a printer */ + if (strstr(sep, "PJL") || strstr(sep, "PCL")) + guessed_class = PARPORT_CLASS_PRINTER; + } else if (!strcmp(p, "DES") || !strcmp(p, "DESCRIPTION")) { + kfree(info->description); + info->description = kstrdup(sep, GFP_KERNEL); + } + } + rock_on: + if (q) + p = q + 1; + else + p = NULL; + } + + /* If the device didn't tell us its class, maybe we have managed to + guess one from the things it did say. */ + if (info->class == PARPORT_CLASS_UNSPEC) + info->class = guessed_class; + + pretty_print (port, device); + + kfree(txt); +} + +/* Read up to count-1 bytes of device id. Terminate buffer with + * '\0'. Buffer begins with two Device ID length bytes as given by + * device. */ +static ssize_t parport_read_device_id (struct parport *port, char *buffer, + size_t count) +{ + unsigned char length[2]; + unsigned lelen, belen; + size_t idlens[4]; + unsigned numidlens; + unsigned current_idlen; + ssize_t retval; + size_t len; + + /* First two bytes are MSB,LSB of inclusive length. */ + retval = parport_read (port, length, 2); + + if (retval < 0) + return retval; + if (retval != 2) + return -EIO; + + if (count < 2) + return 0; + memcpy(buffer, length, 2); + len = 2; + + /* Some devices wrongly send LE length, and some send it two + * bytes short. Construct a sorted array of lengths to try. */ + belen = (length[0] << 8) + length[1]; + lelen = (length[1] << 8) + length[0]; + idlens[0] = min(belen, lelen); + idlens[1] = idlens[0]+2; + if (belen != lelen) { + int off = 2; + /* Don't try lengths of 0x100 and 0x200 as 1 and 2 */ + if (idlens[0] <= 2) + off = 0; + idlens[off] = max(belen, lelen); + idlens[off+1] = idlens[off]+2; + numidlens = off+2; + } + else { + /* Some devices don't truly implement Device ID, but + * just return constant nibble forever. This catches + * also those cases. */ + if (idlens[0] == 0 || idlens[0] > 0xFFF) { + printk (KERN_DEBUG "%s: reported broken Device ID" + " length of %#zX bytes\n", + port->name, idlens[0]); + return -EIO; + } + numidlens = 2; + } + + /* Try to respect the given ID length despite all the bugs in + * the ID length. Read according to shortest possible ID + * first. */ + for (current_idlen = 0; current_idlen < numidlens; ++current_idlen) { + size_t idlen = idlens[current_idlen]; + if (idlen+1 >= count) + break; + + retval = parport_read (port, buffer+len, idlen-len); + + if (retval < 0) + return retval; + len += retval; + + if (port->physport->ieee1284.phase != IEEE1284_PH_HBUSY_DAVAIL) { + if (belen != len) { + printk (KERN_DEBUG "%s: Device ID was %zd bytes" + " while device told it would be %d" + " bytes\n", + port->name, len, belen); + } + goto done; + } + + /* This might end reading the Device ID too + * soon. Hopefully the needed fields were already in + * the first 256 bytes or so that we must have read so + * far. */ + if (buffer[len-1] == ';') { + printk (KERN_DEBUG "%s: Device ID reading stopped" + " before device told data not available. " + "Current idlen %u of %u, len bytes %02X %02X\n", + port->name, current_idlen, numidlens, + length[0], length[1]); + goto done; + } + } + if (current_idlen < numidlens) { + /* Buffer not large enough, read to end of buffer. */ + size_t idlen, len2; + if (len+1 < count) { + retval = parport_read (port, buffer+len, count-len-1); + if (retval < 0) + return retval; + len += retval; + } + /* Read the whole ID since some devices would not + * otherwise give back the Device ID from beginning + * next time when asked. */ + idlen = idlens[current_idlen]; + len2 = len; + while(len2 < idlen && retval > 0) { + char tmp[4]; + retval = parport_read (port, tmp, + min(sizeof tmp, idlen-len2)); + if (retval < 0) + return retval; + len2 += retval; + } + } + /* In addition, there are broken devices out there that don't + even finish off with a semi-colon. We do not need to care + about those at this time. */ + done: + buffer[len] = '\0'; + return len; +} + +/* Get Std 1284 Device ID. */ +ssize_t parport_device_id (int devnum, char *buffer, size_t count) +{ + ssize_t retval = -ENXIO; + struct pardevice *dev = parport_open (devnum, "Device ID probe"); + if (!dev) + return -ENXIO; + + parport_claim_or_block (dev); + + /* Negotiate to compatibility mode, and then to device ID + * mode. (This so that we start form beginning of device ID if + * already in device ID mode.) */ + parport_negotiate (dev->port, IEEE1284_MODE_COMPAT); + retval = parport_negotiate (dev->port, + IEEE1284_MODE_NIBBLE | IEEE1284_DEVICEID); + + if (!retval) { + retval = parport_read_device_id (dev->port, buffer, count); + parport_negotiate (dev->port, IEEE1284_MODE_COMPAT); + if (retval > 2) + parse_data (dev->port, dev->daisy, buffer+2); + } + + parport_release (dev); + parport_close (dev); + return retval; +} diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c new file mode 100644 index 000000000..48804049d --- /dev/null +++ b/drivers/parport/procfs.c @@ -0,0 +1,622 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Sysctl interface for parport devices. + * + * Authors: David Campbell + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Philip Blundell <philb@gnu.org> + * Andrea Arcangeli + * Riccardo Facchetti <fizban@tin.it> + * + * based on work by Grant Guenther <grant@torque.net> + * and Philip Blundell + * + * Cleaned up include files - Russell King <linux@arm.uk.linux.org> + */ + +#include <linux/string.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/parport.h> +#include <linux/ctype.h> +#include <linux/sysctl.h> +#include <linux/device.h> + +#include <linux/uaccess.h> + +#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS) + +#define PARPORT_MIN_TIMESLICE_VALUE 1ul +#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ) +#define PARPORT_MIN_SPINTIME_VALUE 1 +#define PARPORT_MAX_SPINTIME_VALUE 1000 + +static int do_active_device(struct ctl_table *table, int write, + void __user *result, size_t *lenp, loff_t *ppos) +{ + struct parport *port = (struct parport *)table->extra1; + char buffer[256]; + struct pardevice *dev; + int len = 0; + + if (write) /* can't happen anyway */ + return -EACCES; + + if (*ppos) { + *lenp = 0; + return 0; + } + + for (dev = port->devices; dev ; dev = dev->next) { + if(dev == port->cad) { + len += sprintf(buffer, "%s\n", dev->name); + } + } + + if(!len) { + len += sprintf(buffer, "%s\n", "none"); + } + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user(result, buffer, len) ? -EFAULT : 0; +} + +#ifdef CONFIG_PARPORT_1284 +static int do_autoprobe(struct ctl_table *table, int write, + void __user *result, size_t *lenp, loff_t *ppos) +{ + struct parport_device_info *info = table->extra2; + const char *str; + char buffer[256]; + int len = 0; + + if (write) /* permissions stop this */ + return -EACCES; + + if (*ppos) { + *lenp = 0; + return 0; + } + + if ((str = info->class_name) != NULL) + len += sprintf (buffer + len, "CLASS:%s;\n", str); + + if ((str = info->model) != NULL) + len += sprintf (buffer + len, "MODEL:%s;\n", str); + + if ((str = info->mfr) != NULL) + len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str); + + if ((str = info->description) != NULL) + len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str); + + if ((str = info->cmdset) != NULL) + len += sprintf (buffer + len, "COMMAND SET:%s;\n", str); + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user (result, buffer, len) ? -EFAULT : 0; +} +#endif /* IEEE1284.3 support. */ + +static int do_hardware_base_addr(struct ctl_table *table, int write, + void __user *result, + size_t *lenp, loff_t *ppos) +{ + struct parport *port = (struct parport *)table->extra1; + char buffer[20]; + int len = 0; + + if (*ppos) { + *lenp = 0; + return 0; + } + + if (write) /* permissions prevent this anyway */ + return -EACCES; + + len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi); + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user(result, buffer, len) ? -EFAULT : 0; +} + +static int do_hardware_irq(struct ctl_table *table, int write, + void __user *result, + size_t *lenp, loff_t *ppos) +{ + struct parport *port = (struct parport *)table->extra1; + char buffer[20]; + int len = 0; + + if (*ppos) { + *lenp = 0; + return 0; + } + + if (write) /* permissions prevent this anyway */ + return -EACCES; + + len += sprintf (buffer, "%d\n", port->irq); + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user(result, buffer, len) ? -EFAULT : 0; +} + +static int do_hardware_dma(struct ctl_table *table, int write, + void __user *result, + size_t *lenp, loff_t *ppos) +{ + struct parport *port = (struct parport *)table->extra1; + char buffer[20]; + int len = 0; + + if (*ppos) { + *lenp = 0; + return 0; + } + + if (write) /* permissions prevent this anyway */ + return -EACCES; + + len += sprintf (buffer, "%d\n", port->dma); + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user(result, buffer, len) ? -EFAULT : 0; +} + +static int do_hardware_modes(struct ctl_table *table, int write, + void __user *result, + size_t *lenp, loff_t *ppos) +{ + struct parport *port = (struct parport *)table->extra1; + char buffer[40]; + int len = 0; + + if (*ppos) { + *lenp = 0; + return 0; + } + + if (write) /* permissions prevent this anyway */ + return -EACCES; + + { +#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}} + int f = 0; + printmode(PCSPP); + printmode(TRISTATE); + printmode(COMPAT); + printmode(EPP); + printmode(ECP); + printmode(DMA); +#undef printmode + } + buffer[len++] = '\n'; + + if (len > *lenp) + len = *lenp; + else + *lenp = len; + + *ppos += len; + + return copy_to_user(result, buffer, len) ? -EFAULT : 0; +} + +#define PARPORT_PORT_DIR(CHILD) { .procname = NULL, .mode = 0555, .child = CHILD } +#define PARPORT_PARPORT_DIR(CHILD) { .procname = "parport", \ + .mode = 0555, .child = CHILD } +#define PARPORT_DEV_DIR(CHILD) { .procname = "dev", .mode = 0555, .child = CHILD } +#define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \ + .mode = 0555, .child = NULL } + +static const unsigned long parport_min_timeslice_value = +PARPORT_MIN_TIMESLICE_VALUE; + +static const unsigned long parport_max_timeslice_value = +PARPORT_MAX_TIMESLICE_VALUE; + +static const int parport_min_spintime_value = +PARPORT_MIN_SPINTIME_VALUE; + +static const int parport_max_spintime_value = +PARPORT_MAX_SPINTIME_VALUE; + + +struct parport_sysctl_table { + struct ctl_table_header *sysctl_header; + struct ctl_table vars[12]; + struct ctl_table device_dir[2]; + struct ctl_table port_dir[2]; + struct ctl_table parport_dir[2]; + struct ctl_table dev_dir[2]; +}; + +static const struct parport_sysctl_table parport_sysctl_template = { + .sysctl_header = NULL, + { + { + .procname = "spintime", + .data = NULL, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = (void*) &parport_min_spintime_value, + .extra2 = (void*) &parport_max_spintime_value + }, + { + .procname = "base-addr", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_hardware_base_addr + }, + { + .procname = "irq", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_hardware_irq + }, + { + .procname = "dma", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_hardware_dma + }, + { + .procname = "modes", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_hardware_modes + }, + PARPORT_DEVICES_ROOT_DIR, +#ifdef CONFIG_PARPORT_1284 + { + .procname = "autoprobe", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_autoprobe + }, + { + .procname = "autoprobe0", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_autoprobe + }, + { + .procname = "autoprobe1", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_autoprobe + }, + { + .procname = "autoprobe2", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_autoprobe + }, + { + .procname = "autoprobe3", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_autoprobe + }, +#endif /* IEEE 1284 support */ + {} + }, + { + { + .procname = "active", + .data = NULL, + .maxlen = 0, + .mode = 0444, + .proc_handler = do_active_device + }, + {} + }, + { + PARPORT_PORT_DIR(NULL), + {} + }, + { + PARPORT_PARPORT_DIR(NULL), + {} + }, + { + PARPORT_DEV_DIR(NULL), + {} + } +}; + +struct parport_device_sysctl_table +{ + struct ctl_table_header *sysctl_header; + struct ctl_table vars[2]; + struct ctl_table device_dir[2]; + struct ctl_table devices_root_dir[2]; + struct ctl_table port_dir[2]; + struct ctl_table parport_dir[2]; + struct ctl_table dev_dir[2]; +}; + +static const struct parport_device_sysctl_table +parport_device_sysctl_template = { + .sysctl_header = NULL, + { + { + .procname = "timeslice", + .data = NULL, + .maxlen = sizeof(unsigned long), + .mode = 0644, + .proc_handler = proc_doulongvec_ms_jiffies_minmax, + .extra1 = (void*) &parport_min_timeslice_value, + .extra2 = (void*) &parport_max_timeslice_value + }, + }, + { + { + .procname = NULL, + .data = NULL, + .maxlen = 0, + .mode = 0555, + .child = NULL + }, + {} + }, + { + PARPORT_DEVICES_ROOT_DIR, + {} + }, + { + PARPORT_PORT_DIR(NULL), + {} + }, + { + PARPORT_PARPORT_DIR(NULL), + {} + }, + { + PARPORT_DEV_DIR(NULL), + {} + } +}; + +struct parport_default_sysctl_table +{ + struct ctl_table_header *sysctl_header; + struct ctl_table vars[3]; + struct ctl_table default_dir[2]; + struct ctl_table parport_dir[2]; + struct ctl_table dev_dir[2]; +}; + +static struct parport_default_sysctl_table +parport_default_sysctl_table = { + .sysctl_header = NULL, + { + { + .procname = "timeslice", + .data = &parport_default_timeslice, + .maxlen = sizeof(parport_default_timeslice), + .mode = 0644, + .proc_handler = proc_doulongvec_ms_jiffies_minmax, + .extra1 = (void*) &parport_min_timeslice_value, + .extra2 = (void*) &parport_max_timeslice_value + }, + { + .procname = "spintime", + .data = &parport_default_spintime, + .maxlen = sizeof(parport_default_spintime), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = (void*) &parport_min_spintime_value, + .extra2 = (void*) &parport_max_spintime_value + }, + {} + }, + { + { + .procname = "default", + .mode = 0555, + .child = parport_default_sysctl_table.vars + }, + {} + }, + { + PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir), + {} + }, + { + PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), + {} + } +}; + + +int parport_proc_register(struct parport *port) +{ + struct parport_sysctl_table *t; + int i; + + t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL); + if (t == NULL) + return -ENOMEM; + + t->device_dir[0].extra1 = port; + + for (i = 0; i < 5; i++) + t->vars[i].extra1 = port; + + t->vars[0].data = &port->spintime; + t->vars[5].child = t->device_dir; + + for (i = 0; i < 5; i++) + t->vars[6 + i].extra2 = &port->probe_info[i]; + + t->port_dir[0].procname = port->name; + + t->port_dir[0].child = t->vars; + t->parport_dir[0].child = t->port_dir; + t->dev_dir[0].child = t->parport_dir; + + t->sysctl_header = register_sysctl_table(t->dev_dir); + if (t->sysctl_header == NULL) { + kfree(t); + t = NULL; + } + port->sysctl_table = t; + return 0; +} + +int parport_proc_unregister(struct parport *port) +{ + if (port->sysctl_table) { + struct parport_sysctl_table *t = port->sysctl_table; + port->sysctl_table = NULL; + unregister_sysctl_table(t->sysctl_header); + kfree(t); + } + return 0; +} + +int parport_device_proc_register(struct pardevice *device) +{ + struct parport_device_sysctl_table *t; + struct parport * port = device->port; + + t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL); + if (t == NULL) + return -ENOMEM; + + t->dev_dir[0].child = t->parport_dir; + t->parport_dir[0].child = t->port_dir; + t->port_dir[0].procname = port->name; + t->port_dir[0].child = t->devices_root_dir; + t->devices_root_dir[0].child = t->device_dir; + + t->device_dir[0].procname = device->name; + t->device_dir[0].child = t->vars; + t->vars[0].data = &device->timeslice; + + t->sysctl_header = register_sysctl_table(t->dev_dir); + if (t->sysctl_header == NULL) { + kfree(t); + t = NULL; + } + device->sysctl_table = t; + return 0; +} + +int parport_device_proc_unregister(struct pardevice *device) +{ + if (device->sysctl_table) { + struct parport_device_sysctl_table *t = device->sysctl_table; + device->sysctl_table = NULL; + unregister_sysctl_table(t->sysctl_header); + kfree(t); + } + return 0; +} + +static int __init parport_default_proc_register(void) +{ + int ret; + + parport_default_sysctl_table.sysctl_header = + register_sysctl_table(parport_default_sysctl_table.dev_dir); + if (!parport_default_sysctl_table.sysctl_header) + return -ENOMEM; + ret = parport_bus_init(); + if (ret) { + unregister_sysctl_table(parport_default_sysctl_table. + sysctl_header); + return ret; + } + return 0; +} + +static void __exit parport_default_proc_unregister(void) +{ + if (parport_default_sysctl_table.sysctl_header) { + unregister_sysctl_table(parport_default_sysctl_table. + sysctl_header); + parport_default_sysctl_table.sysctl_header = NULL; + } + parport_bus_exit(); +} + +#else /* no sysctl or no procfs*/ + +int parport_proc_register(struct parport *pp) +{ + return 0; +} + +int parport_proc_unregister(struct parport *pp) +{ + return 0; +} + +int parport_device_proc_register(struct pardevice *device) +{ + return 0; +} + +int parport_device_proc_unregister(struct pardevice *device) +{ + return 0; +} + +static int __init parport_default_proc_register (void) +{ + return parport_bus_init(); +} + +static void __exit parport_default_proc_unregister (void) +{ + parport_bus_exit(); +} +#endif + +subsys_initcall(parport_default_proc_register) +module_exit(parport_default_proc_unregister) diff --git a/drivers/parport/share.c b/drivers/parport/share.c new file mode 100644 index 000000000..15c81cffd --- /dev/null +++ b/drivers/parport/share.c @@ -0,0 +1,1391 @@ +/* + * Parallel-port resource manager code. + * + * Authors: David Campbell <campbell@tirian.che.curtin.edu.au> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * Philip Blundell <philb@gnu.org> + * Andrea Arcangeli + * + * based on work by Grant Guenther <grant@torque.net> + * and Philip Blundell + * + * Any part of this program may be used in documents licensed under + * the GNU Free Documentation License, Version 1.1 or any later version + * published by the Free Software Foundation. + */ + +#undef PARPORT_DEBUG_SHARING /* undef for production */ + +#include <linux/module.h> +#include <linux/string.h> +#include <linux/threads.h> +#include <linux/parport.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/sched/signal.h> +#include <linux/kmod.h> +#include <linux/device.h> + +#include <linux/spinlock.h> +#include <linux/mutex.h> +#include <asm/irq.h> + +#undef PARPORT_PARANOID + +#define PARPORT_DEFAULT_TIMESLICE (HZ/5) + +unsigned long parport_default_timeslice = PARPORT_DEFAULT_TIMESLICE; +int parport_default_spintime = DEFAULT_SPIN_TIME; + +static LIST_HEAD(portlist); +static DEFINE_SPINLOCK(parportlist_lock); + +/* list of all allocated ports, sorted by ->number */ +static LIST_HEAD(all_ports); +static DEFINE_SPINLOCK(full_list_lock); + +static LIST_HEAD(drivers); + +static DEFINE_MUTEX(registration_lock); + +/* What you can do to a port that's gone away.. */ +static void dead_write_lines(struct parport *p, unsigned char b){} +static unsigned char dead_read_lines(struct parport *p) { return 0; } +static unsigned char dead_frob_lines(struct parport *p, unsigned char b, + unsigned char c) { return 0; } +static void dead_onearg(struct parport *p){} +static void dead_initstate(struct pardevice *d, struct parport_state *s) { } +static void dead_state(struct parport *p, struct parport_state *s) { } +static size_t dead_write(struct parport *p, const void *b, size_t l, int f) +{ return 0; } +static size_t dead_read(struct parport *p, void *b, size_t l, int f) +{ return 0; } +static struct parport_operations dead_ops = { + .write_data = dead_write_lines, /* data */ + .read_data = dead_read_lines, + + .write_control = dead_write_lines, /* control */ + .read_control = dead_read_lines, + .frob_control = dead_frob_lines, + + .read_status = dead_read_lines, /* status */ + + .enable_irq = dead_onearg, /* enable_irq */ + .disable_irq = dead_onearg, /* disable_irq */ + + .data_forward = dead_onearg, /* data_forward */ + .data_reverse = dead_onearg, /* data_reverse */ + + .init_state = dead_initstate, /* init_state */ + .save_state = dead_state, + .restore_state = dead_state, + + .epp_write_data = dead_write, /* epp */ + .epp_read_data = dead_read, + .epp_write_addr = dead_write, + .epp_read_addr = dead_read, + + .ecp_write_data = dead_write, /* ecp */ + .ecp_read_data = dead_read, + .ecp_write_addr = dead_write, + + .compat_write_data = dead_write, /* compat */ + .nibble_read_data = dead_read, /* nibble */ + .byte_read_data = dead_read, /* byte */ + + .owner = NULL, +}; + +static struct device_type parport_device_type = { + .name = "parport", +}; + +static int is_parport(struct device *dev) +{ + return dev->type == &parport_device_type; +} + +static int parport_probe(struct device *dev) +{ + struct parport_driver *drv; + + if (is_parport(dev)) + return -ENODEV; + + drv = to_parport_driver(dev->driver); + if (!drv->probe) { + /* if driver has not defined a custom probe */ + struct pardevice *par_dev = to_pardevice(dev); + + if (strcmp(par_dev->name, drv->name)) + return -ENODEV; + return 0; + } + /* if driver defined its own probe */ + return drv->probe(to_pardevice(dev)); +} + +static struct bus_type parport_bus_type = { + .name = "parport", + .probe = parport_probe, +}; + +int parport_bus_init(void) +{ + return bus_register(&parport_bus_type); +} + +void parport_bus_exit(void) +{ + bus_unregister(&parport_bus_type); +} + +/* + * iterates through all the drivers registered with the bus and sends the port + * details to the match_port callback of the driver, so that the driver can + * know about the new port that just registered with the bus and decide if it + * wants to use this new port. + */ +static int driver_check(struct device_driver *dev_drv, void *_port) +{ + struct parport *port = _port; + struct parport_driver *drv = to_parport_driver(dev_drv); + + if (drv->match_port) + drv->match_port(port); + return 0; +} + +/* Call attach(port) for each registered driver. */ +static void attach_driver_chain(struct parport *port) +{ + /* caller has exclusive registration_lock */ + struct parport_driver *drv; + + list_for_each_entry(drv, &drivers, list) + drv->attach(port); + + /* + * call the driver_check function of the drivers registered in + * new device model + */ + + bus_for_each_drv(&parport_bus_type, NULL, port, driver_check); +} + +static int driver_detach(struct device_driver *_drv, void *_port) +{ + struct parport *port = _port; + struct parport_driver *drv = to_parport_driver(_drv); + + if (drv->detach) + drv->detach(port); + return 0; +} + +/* Call detach(port) for each registered driver. */ +static void detach_driver_chain(struct parport *port) +{ + struct parport_driver *drv; + /* caller has exclusive registration_lock */ + list_for_each_entry(drv, &drivers, list) + drv->detach(port); + + /* + * call the detach function of the drivers registered in + * new device model + */ + + bus_for_each_drv(&parport_bus_type, NULL, port, driver_detach); +} + +/* Ask kmod for some lowlevel drivers. */ +static void get_lowlevel_driver(void) +{ + /* + * There is no actual module called this: you should set + * up an alias for modutils. + */ + request_module("parport_lowlevel"); +} + +/* + * iterates through all the devices connected to the bus and sends the device + * details to the match_port callback of the driver, so that the driver can + * know what are all the ports that are connected to the bus and choose the + * port to which it wants to register its device. + */ +static int port_check(struct device *dev, void *dev_drv) +{ + struct parport_driver *drv = dev_drv; + + /* only send ports, do not send other devices connected to bus */ + if (is_parport(dev)) + drv->match_port(to_parport_dev(dev)); + return 0; +} + +/* + * Iterates through all the devices connected to the bus and return 1 + * if the device is a parallel port. + */ + +static int port_detect(struct device *dev, void *dev_drv) +{ + if (is_parport(dev)) + return 1; + return 0; +} + +/** + * parport_register_driver - register a parallel port device driver + * @drv: structure describing the driver + * @owner: owner module of drv + * @mod_name: module name string + * + * This can be called by a parallel port device driver in order + * to receive notifications about ports being found in the + * system, as well as ports no longer available. + * + * If devmodel is true then the new device model is used + * for registration. + * + * The @drv structure is allocated by the caller and must not be + * deallocated until after calling parport_unregister_driver(). + * + * If using the non device model: + * The driver's attach() function may block. The port that + * attach() is given will be valid for the duration of the + * callback, but if the driver wants to take a copy of the + * pointer it must call parport_get_port() to do so. Calling + * parport_register_device() on that port will do this for you. + * + * The driver's detach() function may block. The port that + * detach() is given will be valid for the duration of the + * callback, but if the driver wants to take a copy of the + * pointer it must call parport_get_port() to do so. + * + * + * Returns 0 on success. The non device model will always succeeds. + * but the new device model can fail and will return the error code. + **/ + +int __parport_register_driver(struct parport_driver *drv, struct module *owner, + const char *mod_name) +{ + if (list_empty(&portlist)) + get_lowlevel_driver(); + + if (drv->devmodel) { + /* using device model */ + int ret; + + /* initialize common driver fields */ + drv->driver.name = drv->name; + drv->driver.bus = &parport_bus_type; + drv->driver.owner = owner; + drv->driver.mod_name = mod_name; + ret = driver_register(&drv->driver); + if (ret) + return ret; + + /* + * check if bus has any parallel port registered, if + * none is found then load the lowlevel driver. + */ + ret = bus_for_each_dev(&parport_bus_type, NULL, NULL, + port_detect); + if (!ret) + get_lowlevel_driver(); + + mutex_lock(®istration_lock); + if (drv->match_port) + bus_for_each_dev(&parport_bus_type, NULL, drv, + port_check); + mutex_unlock(®istration_lock); + } else { + struct parport *port; + + drv->devmodel = false; + + mutex_lock(®istration_lock); + list_for_each_entry(port, &portlist, list) + drv->attach(port); + list_add(&drv->list, &drivers); + mutex_unlock(®istration_lock); + } + + return 0; +} +EXPORT_SYMBOL(__parport_register_driver); + +static int port_detach(struct device *dev, void *_drv) +{ + struct parport_driver *drv = _drv; + + if (is_parport(dev) && drv->detach) + drv->detach(to_parport_dev(dev)); + + return 0; +} + +/** + * parport_unregister_driver - deregister a parallel port device driver + * @drv: structure describing the driver that was given to + * parport_register_driver() + * + * This should be called by a parallel port device driver that + * has registered itself using parport_register_driver() when it + * is about to be unloaded. + * + * When it returns, the driver's attach() routine will no longer + * be called, and for each port that attach() was called for, the + * detach() routine will have been called. + * + * All the driver's attach() and detach() calls are guaranteed to have + * finished by the time this function returns. + **/ + +void parport_unregister_driver(struct parport_driver *drv) +{ + struct parport *port; + + mutex_lock(®istration_lock); + if (drv->devmodel) { + bus_for_each_dev(&parport_bus_type, NULL, drv, port_detach); + driver_unregister(&drv->driver); + } else { + list_del_init(&drv->list); + list_for_each_entry(port, &portlist, list) + drv->detach(port); + } + mutex_unlock(®istration_lock); +} +EXPORT_SYMBOL(parport_unregister_driver); + +static void free_port(struct device *dev) +{ + int d; + struct parport *port = to_parport_dev(dev); + + spin_lock(&full_list_lock); + list_del(&port->full_list); + spin_unlock(&full_list_lock); + for (d = 0; d < 5; d++) { + kfree(port->probe_info[d].class_name); + kfree(port->probe_info[d].mfr); + kfree(port->probe_info[d].model); + kfree(port->probe_info[d].cmdset); + kfree(port->probe_info[d].description); + } + + kfree(port->name); + kfree(port); +} + +/** + * parport_get_port - increment a port's reference count + * @port: the port + * + * This ensures that a struct parport pointer remains valid + * until the matching parport_put_port() call. + **/ + +struct parport *parport_get_port(struct parport *port) +{ + struct device *dev = get_device(&port->bus_dev); + + return to_parport_dev(dev); +} +EXPORT_SYMBOL(parport_get_port); + +void parport_del_port(struct parport *port) +{ + device_unregister(&port->bus_dev); +} +EXPORT_SYMBOL(parport_del_port); + +/** + * parport_put_port - decrement a port's reference count + * @port: the port + * + * This should be called once for each call to parport_get_port(), + * once the port is no longer needed. When the reference count reaches + * zero (port is no longer used), free_port is called. + **/ + +void parport_put_port(struct parport *port) +{ + put_device(&port->bus_dev); +} +EXPORT_SYMBOL(parport_put_port); + +/** + * parport_register_port - register a parallel port + * @base: base I/O address + * @irq: IRQ line + * @dma: DMA channel + * @ops: pointer to the port driver's port operations structure + * + * When a parallel port (lowlevel) driver finds a port that + * should be made available to parallel port device drivers, it + * should call parport_register_port(). The @base, @irq, and + * @dma parameters are for the convenience of port drivers, and + * for ports where they aren't meaningful needn't be set to + * anything special. They can be altered afterwards by adjusting + * the relevant members of the parport structure that is returned + * and represents the port. They should not be tampered with + * after calling parport_announce_port, however. + * + * If there are parallel port device drivers in the system that + * have registered themselves using parport_register_driver(), + * they are not told about the port at this time; that is done by + * parport_announce_port(). + * + * The @ops structure is allocated by the caller, and must not be + * deallocated before calling parport_remove_port(). + * + * If there is no memory to allocate a new parport structure, + * this function will return %NULL. + **/ + +struct parport *parport_register_port(unsigned long base, int irq, int dma, + struct parport_operations *ops) +{ + struct list_head *l; + struct parport *tmp; + int num; + int device; + char *name; + int ret; + + tmp = kzalloc(sizeof(struct parport), GFP_KERNEL); + if (!tmp) + return NULL; + + /* Init our structure */ + tmp->base = base; + tmp->irq = irq; + tmp->dma = dma; + tmp->muxport = tmp->daisy = tmp->muxsel = -1; + tmp->modes = 0; + INIT_LIST_HEAD(&tmp->list); + tmp->devices = tmp->cad = NULL; + tmp->flags = 0; + tmp->ops = ops; + tmp->physport = tmp; + memset(tmp->probe_info, 0, 5 * sizeof(struct parport_device_info)); + rwlock_init(&tmp->cad_lock); + spin_lock_init(&tmp->waitlist_lock); + spin_lock_init(&tmp->pardevice_lock); + tmp->ieee1284.mode = IEEE1284_MODE_COMPAT; + tmp->ieee1284.phase = IEEE1284_PH_FWD_IDLE; + sema_init(&tmp->ieee1284.irq, 0); + tmp->spintime = parport_default_spintime; + atomic_set(&tmp->ref_count, 1); + INIT_LIST_HEAD(&tmp->full_list); + + name = kmalloc(15, GFP_KERNEL); + if (!name) { + kfree(tmp); + return NULL; + } + /* Search for the lowest free parport number. */ + + spin_lock(&full_list_lock); + for (l = all_ports.next, num = 0; l != &all_ports; l = l->next, num++) { + struct parport *p = list_entry(l, struct parport, full_list); + if (p->number != num) + break; + } + tmp->portnum = tmp->number = num; + list_add_tail(&tmp->full_list, l); + spin_unlock(&full_list_lock); + + /* + * Now that the portnum is known finish doing the Init. + */ + sprintf(name, "parport%d", tmp->portnum = tmp->number); + tmp->name = name; + tmp->bus_dev.bus = &parport_bus_type; + tmp->bus_dev.release = free_port; + dev_set_name(&tmp->bus_dev, name); + tmp->bus_dev.type = &parport_device_type; + + for (device = 0; device < 5; device++) + /* assume the worst */ + tmp->probe_info[device].class = PARPORT_CLASS_LEGACY; + + tmp->waithead = tmp->waittail = NULL; + + ret = device_register(&tmp->bus_dev); + if (ret) { + put_device(&tmp->bus_dev); + return NULL; + } + + return tmp; +} +EXPORT_SYMBOL(parport_register_port); + +/** + * parport_announce_port - tell device drivers about a parallel port + * @port: parallel port to announce + * + * After a port driver has registered a parallel port with + * parport_register_port, and performed any necessary + * initialisation or adjustments, it should call + * parport_announce_port() in order to notify all device drivers + * that have called parport_register_driver(). Their attach() + * functions will be called, with @port as the parameter. + **/ + +void parport_announce_port(struct parport *port) +{ + int i; + +#ifdef CONFIG_PARPORT_1284 + /* Analyse the IEEE1284.3 topology of the port. */ + parport_daisy_init(port); +#endif + + if (!port->dev) + printk(KERN_WARNING "%s: fix this legacy no-device port driver!\n", + port->name); + + parport_proc_register(port); + mutex_lock(®istration_lock); + spin_lock_irq(&parportlist_lock); + list_add_tail(&port->list, &portlist); + for (i = 1; i < 3; i++) { + struct parport *slave = port->slaves[i-1]; + if (slave) + list_add_tail(&slave->list, &portlist); + } + spin_unlock_irq(&parportlist_lock); + + /* Let drivers know that new port(s) has arrived. */ + attach_driver_chain(port); + for (i = 1; i < 3; i++) { + struct parport *slave = port->slaves[i-1]; + if (slave) + attach_driver_chain(slave); + } + mutex_unlock(®istration_lock); +} +EXPORT_SYMBOL(parport_announce_port); + +/** + * parport_remove_port - deregister a parallel port + * @port: parallel port to deregister + * + * When a parallel port driver is forcibly unloaded, or a + * parallel port becomes inaccessible, the port driver must call + * this function in order to deal with device drivers that still + * want to use it. + * + * The parport structure associated with the port has its + * operations structure replaced with one containing 'null' + * operations that return errors or just don't do anything. + * + * Any drivers that have registered themselves using + * parport_register_driver() are notified that the port is no + * longer accessible by having their detach() routines called + * with @port as the parameter. + **/ + +void parport_remove_port(struct parport *port) +{ + int i; + + mutex_lock(®istration_lock); + + /* Spread the word. */ + detach_driver_chain(port); + +#ifdef CONFIG_PARPORT_1284 + /* Forget the IEEE1284.3 topology of the port. */ + parport_daisy_fini(port); + for (i = 1; i < 3; i++) { + struct parport *slave = port->slaves[i-1]; + if (!slave) + continue; + detach_driver_chain(slave); + parport_daisy_fini(slave); + } +#endif + + port->ops = &dead_ops; + spin_lock(&parportlist_lock); + list_del_init(&port->list); + for (i = 1; i < 3; i++) { + struct parport *slave = port->slaves[i-1]; + if (slave) + list_del_init(&slave->list); + } + spin_unlock(&parportlist_lock); + + mutex_unlock(®istration_lock); + + parport_proc_unregister(port); + + for (i = 1; i < 3; i++) { + struct parport *slave = port->slaves[i-1]; + if (slave) + parport_put_port(slave); + } +} +EXPORT_SYMBOL(parport_remove_port); + +/** + * parport_register_device - register a device on a parallel port + * @port: port to which the device is attached + * @name: a name to refer to the device + * @pf: preemption callback + * @kf: kick callback (wake-up) + * @irq_func: interrupt handler + * @flags: registration flags + * @handle: data for callback functions + * + * This function, called by parallel port device drivers, + * declares that a device is connected to a port, and tells the + * system all it needs to know. + * + * The @name is allocated by the caller and must not be + * deallocated until the caller calls @parport_unregister_device + * for that device. + * + * The preemption callback function, @pf, is called when this + * device driver has claimed access to the port but another + * device driver wants to use it. It is given @handle as its + * parameter, and should return zero if it is willing for the + * system to release the port to another driver on its behalf. + * If it wants to keep control of the port it should return + * non-zero, and no action will be taken. It is good manners for + * the driver to try to release the port at the earliest + * opportunity after its preemption callback rejects a preemption + * attempt. Note that if a preemption callback is happy for + * preemption to go ahead, there is no need to release the port; + * it is done automatically. This function may not block, as it + * may be called from interrupt context. If the device driver + * does not support preemption, @pf can be %NULL. + * + * The wake-up ("kick") callback function, @kf, is called when + * the port is available to be claimed for exclusive access; that + * is, parport_claim() is guaranteed to succeed when called from + * inside the wake-up callback function. If the driver wants to + * claim the port it should do so; otherwise, it need not take + * any action. This function may not block, as it may be called + * from interrupt context. If the device driver does not want to + * be explicitly invited to claim the port in this way, @kf can + * be %NULL. + * + * The interrupt handler, @irq_func, is called when an interrupt + * arrives from the parallel port. Note that if a device driver + * wants to use interrupts it should use parport_enable_irq(), + * and can also check the irq member of the parport structure + * representing the port. + * + * The parallel port (lowlevel) driver is the one that has called + * request_irq() and whose interrupt handler is called first. + * This handler does whatever needs to be done to the hardware to + * acknowledge the interrupt (for PC-style ports there is nothing + * special to be done). It then tells the IEEE 1284 code about + * the interrupt, which may involve reacting to an IEEE 1284 + * event depending on the current IEEE 1284 phase. After this, + * it calls @irq_func. Needless to say, @irq_func will be called + * from interrupt context, and may not block. + * + * The %PARPORT_DEV_EXCL flag is for preventing port sharing, and + * so should only be used when sharing the port with other device + * drivers is impossible and would lead to incorrect behaviour. + * Use it sparingly! Normally, @flags will be zero. + * + * This function returns a pointer to a structure that represents + * the device on the port, or %NULL if there is not enough memory + * to allocate space for that structure. + **/ + +struct pardevice * +parport_register_device(struct parport *port, const char *name, + int (*pf)(void *), void (*kf)(void *), + void (*irq_func)(void *), + int flags, void *handle) +{ + struct pardevice *tmp; + + if (port->physport->flags & PARPORT_FLAG_EXCL) { + /* An exclusive device is registered. */ + printk(KERN_DEBUG "%s: no more devices allowed\n", + port->name); + return NULL; + } + + if (flags & PARPORT_DEV_LURK) { + if (!pf || !kf) { + printk(KERN_INFO "%s: refused to register lurking device (%s) without callbacks\n", port->name, name); + return NULL; + } + } + + if (flags & PARPORT_DEV_EXCL) { + if (port->physport->devices) { + /* + * If a device is already registered and this new + * device wants exclusive access, then no need to + * continue as we can not grant exclusive access to + * this device. + */ + pr_err("%s: cannot grant exclusive access for device %s\n", + port->name, name); + return NULL; + } + } + + /* + * We up our own module reference count, and that of the port + * on which a device is to be registered, to ensure that + * neither of us gets unloaded while we sleep in (e.g.) + * kmalloc. + */ + if (!try_module_get(port->ops->owner)) + return NULL; + + parport_get_port(port); + + tmp = kmalloc(sizeof(struct pardevice), GFP_KERNEL); + if (!tmp) + goto out; + + tmp->state = kmalloc(sizeof(struct parport_state), GFP_KERNEL); + if (!tmp->state) + goto out_free_pardevice; + + tmp->name = name; + tmp->port = port; + tmp->daisy = -1; + tmp->preempt = pf; + tmp->wakeup = kf; + tmp->private = handle; + tmp->flags = flags; + tmp->irq_func = irq_func; + tmp->waiting = 0; + tmp->timeout = 5 * HZ; + tmp->devmodel = false; + + /* Chain this onto the list */ + tmp->prev = NULL; + /* + * This function must not run from an irq handler so we don' t need + * to clear irq on the local CPU. -arca + */ + spin_lock(&port->physport->pardevice_lock); + + if (flags & PARPORT_DEV_EXCL) { + if (port->physport->devices) { + spin_unlock(&port->physport->pardevice_lock); + printk(KERN_DEBUG + "%s: cannot grant exclusive access for device %s\n", + port->name, name); + goto out_free_all; + } + port->flags |= PARPORT_FLAG_EXCL; + } + + tmp->next = port->physport->devices; + wmb(); /* + * Make sure that tmp->next is written before it's + * added to the list; see comments marked 'no locking + * required' + */ + if (port->physport->devices) + port->physport->devices->prev = tmp; + port->physport->devices = tmp; + spin_unlock(&port->physport->pardevice_lock); + + init_waitqueue_head(&tmp->wait_q); + tmp->timeslice = parport_default_timeslice; + tmp->waitnext = tmp->waitprev = NULL; + + /* + * This has to be run as last thing since init_state may need other + * pardevice fields. -arca + */ + port->ops->init_state(tmp, tmp->state); + if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) { + port->proc_device = tmp; + parport_device_proc_register(tmp); + } + return tmp; + + out_free_all: + kfree(tmp->state); + out_free_pardevice: + kfree(tmp); + out: + parport_put_port(port); + module_put(port->ops->owner); + + return NULL; +} +EXPORT_SYMBOL(parport_register_device); + +static void free_pardevice(struct device *dev) +{ + struct pardevice *par_dev = to_pardevice(dev); + + kfree(par_dev->name); + kfree(par_dev); +} + +struct pardevice * +parport_register_dev_model(struct parport *port, const char *name, + const struct pardev_cb *par_dev_cb, int id) +{ + struct pardevice *par_dev; + int ret; + char *devname; + + if (port->physport->flags & PARPORT_FLAG_EXCL) { + /* An exclusive device is registered. */ + pr_err("%s: no more devices allowed\n", port->name); + return NULL; + } + + if (par_dev_cb->flags & PARPORT_DEV_LURK) { + if (!par_dev_cb->preempt || !par_dev_cb->wakeup) { + pr_info("%s: refused to register lurking device (%s) without callbacks\n", + port->name, name); + return NULL; + } + } + + if (par_dev_cb->flags & PARPORT_DEV_EXCL) { + if (port->physport->devices) { + /* + * If a device is already registered and this new + * device wants exclusive access, then no need to + * continue as we can not grant exclusive access to + * this device. + */ + pr_err("%s: cannot grant exclusive access for device %s\n", + port->name, name); + return NULL; + } + } + + if (!try_module_get(port->ops->owner)) + return NULL; + + parport_get_port(port); + + par_dev = kzalloc(sizeof(*par_dev), GFP_KERNEL); + if (!par_dev) + goto err_put_port; + + par_dev->state = kzalloc(sizeof(*par_dev->state), GFP_KERNEL); + if (!par_dev->state) + goto err_put_par_dev; + + devname = kstrdup(name, GFP_KERNEL); + if (!devname) + goto err_free_par_dev; + + par_dev->name = devname; + par_dev->port = port; + par_dev->daisy = -1; + par_dev->preempt = par_dev_cb->preempt; + par_dev->wakeup = par_dev_cb->wakeup; + par_dev->private = par_dev_cb->private; + par_dev->flags = par_dev_cb->flags; + par_dev->irq_func = par_dev_cb->irq_func; + par_dev->waiting = 0; + par_dev->timeout = 5 * HZ; + + par_dev->dev.parent = &port->bus_dev; + par_dev->dev.bus = &parport_bus_type; + ret = dev_set_name(&par_dev->dev, "%s.%d", devname, id); + if (ret) + goto err_free_devname; + par_dev->dev.release = free_pardevice; + par_dev->devmodel = true; + ret = device_register(&par_dev->dev); + if (ret) { + kfree(par_dev->state); + put_device(&par_dev->dev); + goto err_put_port; + } + + /* Chain this onto the list */ + par_dev->prev = NULL; + /* + * This function must not run from an irq handler so we don' t need + * to clear irq on the local CPU. -arca + */ + spin_lock(&port->physport->pardevice_lock); + + if (par_dev_cb->flags & PARPORT_DEV_EXCL) { + if (port->physport->devices) { + spin_unlock(&port->physport->pardevice_lock); + pr_debug("%s: cannot grant exclusive access for device %s\n", + port->name, name); + kfree(par_dev->state); + device_unregister(&par_dev->dev); + goto err_put_port; + } + port->flags |= PARPORT_FLAG_EXCL; + } + + par_dev->next = port->physport->devices; + wmb(); /* + * Make sure that tmp->next is written before it's + * added to the list; see comments marked 'no locking + * required' + */ + if (port->physport->devices) + port->physport->devices->prev = par_dev; + port->physport->devices = par_dev; + spin_unlock(&port->physport->pardevice_lock); + + init_waitqueue_head(&par_dev->wait_q); + par_dev->timeslice = parport_default_timeslice; + par_dev->waitnext = NULL; + par_dev->waitprev = NULL; + + /* + * This has to be run as last thing since init_state may need other + * pardevice fields. -arca + */ + port->ops->init_state(par_dev, par_dev->state); + if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) { + port->proc_device = par_dev; + parport_device_proc_register(par_dev); + } + + return par_dev; + +err_free_devname: + kfree(devname); +err_free_par_dev: + kfree(par_dev->state); +err_put_par_dev: + if (!par_dev->devmodel) + kfree(par_dev); +err_put_port: + parport_put_port(port); + module_put(port->ops->owner); + + return NULL; +} +EXPORT_SYMBOL(parport_register_dev_model); + +/** + * parport_unregister_device - deregister a device on a parallel port + * @dev: pointer to structure representing device + * + * This undoes the effect of parport_register_device(). + **/ + +void parport_unregister_device(struct pardevice *dev) +{ + struct parport *port; + +#ifdef PARPORT_PARANOID + if (!dev) { + printk(KERN_ERR "parport_unregister_device: passed NULL\n"); + return; + } +#endif + + port = dev->port->physport; + + if (port->proc_device == dev) { + port->proc_device = NULL; + clear_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags); + parport_device_proc_unregister(dev); + } + + if (port->cad == dev) { + printk(KERN_DEBUG "%s: %s forgot to release port\n", + port->name, dev->name); + parport_release(dev); + } + + spin_lock(&port->pardevice_lock); + if (dev->next) + dev->next->prev = dev->prev; + if (dev->prev) + dev->prev->next = dev->next; + else + port->devices = dev->next; + + if (dev->flags & PARPORT_DEV_EXCL) + port->flags &= ~PARPORT_FLAG_EXCL; + + spin_unlock(&port->pardevice_lock); + + /* + * Make sure we haven't left any pointers around in the wait + * list. + */ + spin_lock_irq(&port->waitlist_lock); + if (dev->waitprev || dev->waitnext || port->waithead == dev) { + if (dev->waitprev) + dev->waitprev->waitnext = dev->waitnext; + else + port->waithead = dev->waitnext; + if (dev->waitnext) + dev->waitnext->waitprev = dev->waitprev; + else + port->waittail = dev->waitprev; + } + spin_unlock_irq(&port->waitlist_lock); + + kfree(dev->state); + if (dev->devmodel) + device_unregister(&dev->dev); + else + kfree(dev); + + module_put(port->ops->owner); + parport_put_port(port); +} +EXPORT_SYMBOL(parport_unregister_device); + +/** + * parport_find_number - find a parallel port by number + * @number: parallel port number + * + * This returns the parallel port with the specified number, or + * %NULL if there is none. + * + * There is an implicit parport_get_port() done already; to throw + * away the reference to the port that parport_find_number() + * gives you, use parport_put_port(). + */ + +struct parport *parport_find_number(int number) +{ + struct parport *port, *result = NULL; + + if (list_empty(&portlist)) + get_lowlevel_driver(); + + spin_lock(&parportlist_lock); + list_for_each_entry(port, &portlist, list) { + if (port->number == number) { + result = parport_get_port(port); + break; + } + } + spin_unlock(&parportlist_lock); + return result; +} +EXPORT_SYMBOL(parport_find_number); + +/** + * parport_find_base - find a parallel port by base address + * @base: base I/O address + * + * This returns the parallel port with the specified base + * address, or %NULL if there is none. + * + * There is an implicit parport_get_port() done already; to throw + * away the reference to the port that parport_find_base() + * gives you, use parport_put_port(). + */ + +struct parport *parport_find_base(unsigned long base) +{ + struct parport *port, *result = NULL; + + if (list_empty(&portlist)) + get_lowlevel_driver(); + + spin_lock(&parportlist_lock); + list_for_each_entry(port, &portlist, list) { + if (port->base == base) { + result = parport_get_port(port); + break; + } + } + spin_unlock(&parportlist_lock); + return result; +} +EXPORT_SYMBOL(parport_find_base); + +/** + * parport_claim - claim access to a parallel port device + * @dev: pointer to structure representing a device on the port + * + * This function will not block and so can be used from interrupt + * context. If parport_claim() succeeds in claiming access to + * the port it returns zero and the port is available to use. It + * may fail (returning non-zero) if the port is in use by another + * driver and that driver is not willing to relinquish control of + * the port. + **/ + +int parport_claim(struct pardevice *dev) +{ + struct pardevice *oldcad; + struct parport *port = dev->port->physport; + unsigned long flags; + + if (port->cad == dev) { + printk(KERN_INFO "%s: %s already owner\n", + dev->port->name,dev->name); + return 0; + } + + /* Preempt any current device */ + write_lock_irqsave(&port->cad_lock, flags); + oldcad = port->cad; + if (oldcad) { + if (oldcad->preempt) { + if (oldcad->preempt(oldcad->private)) + goto blocked; + port->ops->save_state(port, dev->state); + } else + goto blocked; + + if (port->cad != oldcad) { + /* + * I think we'll actually deadlock rather than + * get here, but just in case.. + */ + printk(KERN_WARNING + "%s: %s released port when preempted!\n", + port->name, oldcad->name); + if (port->cad) + goto blocked; + } + } + + /* Can't fail from now on, so mark ourselves as no longer waiting. */ + if (dev->waiting & 1) { + dev->waiting = 0; + + /* Take ourselves out of the wait list again. */ + spin_lock_irq(&port->waitlist_lock); + if (dev->waitprev) + dev->waitprev->waitnext = dev->waitnext; + else + port->waithead = dev->waitnext; + if (dev->waitnext) + dev->waitnext->waitprev = dev->waitprev; + else + port->waittail = dev->waitprev; + spin_unlock_irq(&port->waitlist_lock); + dev->waitprev = dev->waitnext = NULL; + } + + /* Now we do the change of devices */ + port->cad = dev; + +#ifdef CONFIG_PARPORT_1284 + /* If it's a mux port, select it. */ + if (dev->port->muxport >= 0) { + /* FIXME */ + port->muxsel = dev->port->muxport; + } + + /* If it's a daisy chain device, select it. */ + if (dev->daisy >= 0) { + /* This could be lazier. */ + if (!parport_daisy_select(port, dev->daisy, + IEEE1284_MODE_COMPAT)) + port->daisy = dev->daisy; + } +#endif /* IEEE1284.3 support */ + + /* Restore control registers */ + port->ops->restore_state(port, dev->state); + write_unlock_irqrestore(&port->cad_lock, flags); + dev->time = jiffies; + return 0; + +blocked: + /* + * If this is the first time we tried to claim the port, register an + * interest. This is only allowed for devices sleeping in + * parport_claim_or_block(), or those with a wakeup function. + */ + + /* The cad_lock is still held for writing here */ + if (dev->waiting & 2 || dev->wakeup) { + spin_lock(&port->waitlist_lock); + if (test_and_set_bit(0, &dev->waiting) == 0) { + /* First add ourselves to the end of the wait list. */ + dev->waitnext = NULL; + dev->waitprev = port->waittail; + if (port->waittail) { + port->waittail->waitnext = dev; + port->waittail = dev; + } else + port->waithead = port->waittail = dev; + } + spin_unlock(&port->waitlist_lock); + } + write_unlock_irqrestore(&port->cad_lock, flags); + return -EAGAIN; +} +EXPORT_SYMBOL(parport_claim); + +/** + * parport_claim_or_block - claim access to a parallel port device + * @dev: pointer to structure representing a device on the port + * + * This behaves like parport_claim(), but will block if necessary + * to wait for the port to be free. A return value of 1 + * indicates that it slept; 0 means that it succeeded without + * needing to sleep. A negative error code indicates failure. + **/ + +int parport_claim_or_block(struct pardevice *dev) +{ + int r; + + /* + * Signal to parport_claim() that we can wait even without a + * wakeup function. + */ + dev->waiting = 2; + + /* Try to claim the port. If this fails, we need to sleep. */ + r = parport_claim(dev); + if (r == -EAGAIN) { +#ifdef PARPORT_DEBUG_SHARING + printk(KERN_DEBUG "%s: parport_claim() returned -EAGAIN\n", dev->name); +#endif + /* + * FIXME!!! Use the proper locking for dev->waiting, + * and make this use the "wait_event_interruptible()" + * interfaces. The cli/sti that used to be here + * did nothing. + * + * See also parport_release() + */ + + /* + * If dev->waiting is clear now, an interrupt + * gave us the port and we would deadlock if we slept. + */ + if (dev->waiting) { + wait_event_interruptible(dev->wait_q, + !dev->waiting); + if (signal_pending(current)) + return -EINTR; + r = 1; + } else { + r = 0; +#ifdef PARPORT_DEBUG_SHARING + printk(KERN_DEBUG "%s: didn't sleep in parport_claim_or_block()\n", + dev->name); +#endif + } + +#ifdef PARPORT_DEBUG_SHARING + if (dev->port->physport->cad != dev) + printk(KERN_DEBUG "%s: exiting parport_claim_or_block but %s owns port!\n", + dev->name, dev->port->physport->cad ? + dev->port->physport->cad->name:"nobody"); +#endif + } + dev->waiting = 0; + return r; +} +EXPORT_SYMBOL(parport_claim_or_block); + +/** + * parport_release - give up access to a parallel port device + * @dev: pointer to structure representing parallel port device + * + * This function cannot fail, but it should not be called without + * the port claimed. Similarly, if the port is already claimed + * you should not try claiming it again. + **/ + +void parport_release(struct pardevice *dev) +{ + struct parport *port = dev->port->physport; + struct pardevice *pd; + unsigned long flags; + + /* Make sure that dev is the current device */ + write_lock_irqsave(&port->cad_lock, flags); + if (port->cad != dev) { + write_unlock_irqrestore(&port->cad_lock, flags); + printk(KERN_WARNING "%s: %s tried to release parport when not owner\n", + port->name, dev->name); + return; + } + +#ifdef CONFIG_PARPORT_1284 + /* If this is on a mux port, deselect it. */ + if (dev->port->muxport >= 0) { + /* FIXME */ + port->muxsel = -1; + } + + /* If this is a daisy device, deselect it. */ + if (dev->daisy >= 0) { + parport_daisy_deselect_all(port); + port->daisy = -1; + } +#endif + + port->cad = NULL; + write_unlock_irqrestore(&port->cad_lock, flags); + + /* Save control registers */ + port->ops->save_state(port, dev->state); + + /* + * If anybody is waiting, find out who's been there longest and + * then wake them up. (Note: no locking required) + */ + /* !!! LOCKING IS NEEDED HERE */ + for (pd = port->waithead; pd; pd = pd->waitnext) { + if (pd->waiting & 2) { /* sleeping in claim_or_block */ + parport_claim(pd); + if (waitqueue_active(&pd->wait_q)) + wake_up_interruptible(&pd->wait_q); + return; + } else if (pd->wakeup) { + pd->wakeup(pd->private); + if (dev->port->cad) /* racy but no matter */ + return; + } else { + printk(KERN_ERR "%s: don't know how to wake %s\n", port->name, pd->name); + } + } + + /* + * Nobody was waiting, so walk the list to see if anyone is + * interested in being woken up. (Note: no locking required) + */ + /* !!! LOCKING IS NEEDED HERE */ + for (pd = port->devices; !port->cad && pd; pd = pd->next) { + if (pd->wakeup && pd != dev) + pd->wakeup(pd->private); + } +} +EXPORT_SYMBOL(parport_release); + +irqreturn_t parport_irq_handler(int irq, void *dev_id) +{ + struct parport *port = dev_id; + + parport_generic_irq(port); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(parport_irq_handler); + +MODULE_LICENSE("GPL"); |