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-rw-r--r--drivers/ata/ata_piix.c1787
1 files changed, 1787 insertions, 0 deletions
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
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index 000000000..3ca7720e7
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+++ b/drivers/ata/ata_piix.c
@@ -0,0 +1,1787 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ata_piix.c - Intel PATA/SATA controllers
+ *
+ * Maintained by: Tejun Heo <tj@kernel.org>
+ * Please ALWAYS copy linux-ide@vger.kernel.org
+ * on emails.
+ *
+ * Copyright 2003-2005 Red Hat Inc
+ * Copyright 2003-2005 Jeff Garzik
+ *
+ * Copyright header from piix.c:
+ *
+ * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
+ * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
+ * Copyright (C) 2003 Red Hat Inc
+ *
+ * libata documentation is available via 'make {ps|pdf}docs',
+ * as Documentation/driver-api/libata.rst
+ *
+ * Hardware documentation available at http://developer.intel.com/
+ *
+ * Documentation
+ * Publicly available from Intel web site. Errata documentation
+ * is also publicly available. As an aide to anyone hacking on this
+ * driver the list of errata that are relevant is below, going back to
+ * PIIX4. Older device documentation is now a bit tricky to find.
+ *
+ * The chipsets all follow very much the same design. The original Triton
+ * series chipsets do _not_ support independent device timings, but this
+ * is fixed in Triton II. With the odd mobile exception the chips then
+ * change little except in gaining more modes until SATA arrives. This
+ * driver supports only the chips with independent timing (that is those
+ * with SITRE and the 0x44 timing register). See pata_oldpiix and pata_mpiix
+ * for the early chip drivers.
+ *
+ * Errata of note:
+ *
+ * Unfixable
+ * PIIX4 errata #9 - Only on ultra obscure hw
+ * ICH3 errata #13 - Not observed to affect real hw
+ * by Intel
+ *
+ * Things we must deal with
+ * PIIX4 errata #10 - BM IDE hang with non UDMA
+ * (must stop/start dma to recover)
+ * 440MX errata #15 - As PIIX4 errata #10
+ * PIIX4 errata #15 - Must not read control registers
+ * during a PIO transfer
+ * 440MX errata #13 - As PIIX4 errata #15
+ * ICH2 errata #21 - DMA mode 0 doesn't work right
+ * ICH0/1 errata #55 - As ICH2 errata #21
+ * ICH2 spec c #9 - Extra operations needed to handle
+ * drive hotswap [NOT YET SUPPORTED]
+ * ICH2 spec c #20 - IDE PRD must not cross a 64K boundary
+ * and must be dword aligned
+ * ICH2 spec c #24 - UDMA mode 4,5 t85/86 should be 6ns not 3.3
+ * ICH7 errata #16 - MWDMA1 timings are incorrect
+ *
+ * Should have been BIOS fixed:
+ * 450NX: errata #19 - DMA hangs on old 450NX
+ * 450NX: errata #20 - DMA hangs on old 450NX
+ * 450NX: errata #25 - Corruption with DMA on old 450NX
+ * ICH3 errata #15 - IDE deadlock under high load
+ * (BIOS must set dev 31 fn 0 bit 23)
+ * ICH3 errata #18 - Don't use native mode
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/gfp.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include <linux/dmi.h>
+
+#define DRV_NAME "ata_piix"
+#define DRV_VERSION "2.13"
+
+enum {
+ PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
+ ICH5_PMR = 0x90, /* address map register */
+ ICH5_PCS = 0x92, /* port control and status */
+ PIIX_SIDPR_BAR = 5,
+ PIIX_SIDPR_LEN = 16,
+ PIIX_SIDPR_IDX = 0,
+ PIIX_SIDPR_DATA = 4,
+
+ PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
+ PIIX_FLAG_SIDPR = (1 << 29), /* SATA idx/data pair regs */
+
+ PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
+ PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
+
+ PIIX_FLAG_PIO16 = (1 << 30), /*support 16bit PIO only*/
+
+ PIIX_80C_PRI = (1 << 5) | (1 << 4),
+ PIIX_80C_SEC = (1 << 7) | (1 << 6),
+
+ /* constants for mapping table */
+ P0 = 0, /* port 0 */
+ P1 = 1, /* port 1 */
+ P2 = 2, /* port 2 */
+ P3 = 3, /* port 3 */
+ IDE = -1, /* IDE */
+ NA = -2, /* not available */
+ RV = -3, /* reserved */
+
+ PIIX_AHCI_DEVICE = 6,
+
+ /* host->flags bits */
+ PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
+};
+
+enum piix_controller_ids {
+ /* controller IDs */
+ piix_pata_mwdma, /* PIIX3 MWDMA only */
+ piix_pata_33, /* PIIX4 at 33Mhz */
+ ich_pata_33, /* ICH up to UDMA 33 only */
+ ich_pata_66, /* ICH up to 66 Mhz */
+ ich_pata_100, /* ICH up to UDMA 100 */
+ ich_pata_100_nomwdma1, /* ICH up to UDMA 100 but with no MWDMA1*/
+ ich5_sata,
+ ich6_sata,
+ ich6m_sata,
+ ich8_sata,
+ ich8_2port_sata,
+ ich8m_apple_sata, /* locks up on second port enable */
+ tolapai_sata,
+ piix_pata_vmw, /* PIIX4 for VMware, spurious DMA_ERR */
+ ich8_sata_snb,
+ ich8_2port_sata_snb,
+ ich8_2port_sata_byt,
+};
+
+struct piix_map_db {
+ const u32 mask;
+ const u16 port_enable;
+ const int map[][4];
+};
+
+struct piix_host_priv {
+ const int *map;
+ u32 saved_iocfg;
+ void __iomem *sidpr;
+};
+
+static unsigned int in_module_init = 1;
+
+static const struct pci_device_id piix_pci_tbl[] = {
+ /* Intel PIIX3 for the 430HX etc */
+ { 0x8086, 0x7010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_mwdma },
+ /* VMware ICH4 */
+ { 0x8086, 0x7111, 0x15ad, 0x1976, 0, 0, piix_pata_vmw },
+ /* Intel PIIX4 for the 430TX/440BX/MX chipset: UDMA 33 */
+ /* Also PIIX4E (fn3 rev 2) and PIIX4M (fn3 rev 3) */
+ { 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
+ /* Intel PIIX4 */
+ { 0x8086, 0x7199, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
+ /* Intel PIIX4 */
+ { 0x8086, 0x7601, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
+ /* Intel PIIX */
+ { 0x8086, 0x84CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix_pata_33 },
+ /* Intel ICH (i810, i815, i840) UDMA 66*/
+ { 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_66 },
+ /* Intel ICH0 : UDMA 33*/
+ { 0x8086, 0x2421, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_33 },
+ /* Intel ICH2M */
+ { 0x8086, 0x244A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH2 (i810E2, i845, 850, 860) UDMA 100 */
+ { 0x8086, 0x244B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH3M */
+ { 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH3 (E7500/1) UDMA 100 */
+ { 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH4-L */
+ { 0x8086, 0x24C1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
+ { 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ { 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH5 */
+ { 0x8086, 0x24DB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* C-ICH (i810E2) */
+ { 0x8086, 0x245B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* ESB (855GME/875P + 6300ESB) UDMA 100 */
+ { 0x8086, 0x25A2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* ICH6 (and 6) (i915) UDMA 100 */
+ { 0x8086, 0x266F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* ICH7/7-R (i945, i975) UDMA 100*/
+ { 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
+ { 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100_nomwdma1 },
+ /* ICH8 Mobile PATA Controller */
+ { 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+
+ /* SATA ports */
+
+ /* 82801EB (ICH5) */
+ { 0x8086, 0x24d1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
+ /* 82801EB (ICH5) */
+ { 0x8086, 0x24df, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
+ /* 6300ESB (ICH5 variant with broken PCS present bits) */
+ { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
+ /* 6300ESB pretending RAID */
+ { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata },
+ /* 82801FB/FW (ICH6/ICH6W) */
+ { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
+ /* 82801FR/FRW (ICH6R/ICH6RW) */
+ { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
+ /* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented).
+ * Attach iff the controller is in IDE mode. */
+ { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID,
+ PCI_CLASS_STORAGE_IDE << 8, 0xffff00, ich6m_sata },
+ /* 82801GB/GR/GH (ICH7, identical to ICH6) */
+ { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
+ /* 82801GBM/GHM (ICH7M, identical to ICH6M) */
+ { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata },
+ /* Enterprise Southbridge 2 (631xESB/632xESB) */
+ { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata },
+ /* SATA Controller 1 IDE (ICH8) */
+ { 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller 2 IDE (ICH8) */
+ { 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* Mobile SATA Controller IDE (ICH8M), Apple */
+ { 0x8086, 0x2828, 0x106b, 0x00a0, 0, 0, ich8m_apple_sata },
+ { 0x8086, 0x2828, 0x106b, 0x00a1, 0, 0, ich8m_apple_sata },
+ { 0x8086, 0x2828, 0x106b, 0x00a3, 0, 0, ich8m_apple_sata },
+ /* Mobile SATA Controller IDE (ICH8M) */
+ { 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (ICH9) */
+ { 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (ICH9) */
+ { 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (ICH9) */
+ { 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (ICH9M) */
+ { 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (ICH9M) */
+ { 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (ICH9M) */
+ { 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (Tolapai) */
+ { 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata },
+ /* SATA Controller IDE (ICH10) */
+ { 0x8086, 0x3a00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (ICH10) */
+ { 0x8086, 0x3a06, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (ICH10) */
+ { 0x8086, 0x3a20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (ICH10) */
+ { 0x8086, 0x3a26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b26, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b28, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b2d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (PCH) */
+ { 0x8086, 0x3b2e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata },
+ /* SATA Controller IDE (CPT) */
+ { 0x8086, 0x1c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (CPT) */
+ { 0x8086, 0x1c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (CPT) */
+ { 0x8086, 0x1c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (CPT) */
+ { 0x8086, 0x1c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (PBG) */
+ { 0x8086, 0x1d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (PBG) */
+ { 0x8086, 0x1d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Panther Point) */
+ { 0x8086, 0x1e00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Panther Point) */
+ { 0x8086, 0x1e01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Panther Point) */
+ { 0x8086, 0x1e08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Panther Point) */
+ { 0x8086, 0x1e09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
+ /* SATA Controller IDE (Lynx Point) */
+ { 0x8086, 0x8c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Lynx Point-LP) */
+ { 0x8086, 0x9c00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point-LP) */
+ { 0x8086, 0x9c01, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Lynx Point-LP) */
+ { 0x8086, 0x9c08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Lynx Point-LP) */
+ { 0x8086, 0x9c09, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (DH89xxCC) */
+ { 0x8086, 0x2326, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f30, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Avoton) */
+ { 0x8086, 0x1f31, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d00, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d08, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d60, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (Wellsburg) */
+ { 0x8086, 0x8d68, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (BayTrail) */
+ { 0x8086, 0x0F20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_byt },
+ { 0x8086, 0x0F21, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_byt },
+ /* SATA Controller IDE (Coleto Creek) */
+ { 0x8086, 0x23a6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata },
+ /* SATA Controller IDE (9 Series) */
+ { 0x8086, 0x8c88, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
+ /* SATA Controller IDE (9 Series) */
+ { 0x8086, 0x8c89, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_2port_sata_snb },
+ /* SATA Controller IDE (9 Series) */
+ { 0x8086, 0x8c80, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+ /* SATA Controller IDE (9 Series) */
+ { 0x8086, 0x8c81, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_snb },
+
+ { } /* terminate list */
+};
+
+static const struct piix_map_db ich5_map_db = {
+ .mask = 0x7,
+ .port_enable = 0x3,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, NA, P1, NA }, /* 000b */
+ { P1, NA, P0, NA }, /* 001b */
+ { RV, RV, RV, RV },
+ { RV, RV, RV, RV },
+ { P0, P1, IDE, IDE }, /* 100b */
+ { P1, P0, IDE, IDE }, /* 101b */
+ { IDE, IDE, P0, P1 }, /* 110b */
+ { IDE, IDE, P1, P0 }, /* 111b */
+ },
+};
+
+static const struct piix_map_db ich6_map_db = {
+ .mask = 0x3,
+ .port_enable = 0xf,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, P2, P1, P3 }, /* 00b */
+ { IDE, IDE, P1, P3 }, /* 01b */
+ { P0, P2, IDE, IDE }, /* 10b */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db ich6m_map_db = {
+ .mask = 0x3,
+ .port_enable = 0x5,
+
+ /* Map 01b isn't specified in the doc but some notebooks use
+ * it anyway. MAP 01b have been spotted on both ICH6M and
+ * ICH7M.
+ */
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, P2, NA, NA }, /* 00b */
+ { IDE, IDE, P1, P3 }, /* 01b */
+ { P0, P2, IDE, IDE }, /* 10b */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db ich8_map_db = {
+ .mask = 0x3,
+ .port_enable = 0xf,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, P2, P1, P3 }, /* 00b (hardwired when in AHCI) */
+ { RV, RV, RV, RV },
+ { P0, P2, IDE, IDE }, /* 10b (IDE mode) */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db ich8_2port_map_db = {
+ .mask = 0x3,
+ .port_enable = 0x3,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, NA, P1, NA }, /* 00b */
+ { RV, RV, RV, RV }, /* 01b */
+ { RV, RV, RV, RV }, /* 10b */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db ich8m_apple_map_db = {
+ .mask = 0x3,
+ .port_enable = 0x1,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, NA, NA, NA }, /* 00b */
+ { RV, RV, RV, RV },
+ { P0, P2, IDE, IDE }, /* 10b */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db tolapai_map_db = {
+ .mask = 0x3,
+ .port_enable = 0x3,
+ .map = {
+ /* PM PS SM SS MAP */
+ { P0, NA, P1, NA }, /* 00b */
+ { RV, RV, RV, RV }, /* 01b */
+ { RV, RV, RV, RV }, /* 10b */
+ { RV, RV, RV, RV },
+ },
+};
+
+static const struct piix_map_db *piix_map_db_table[] = {
+ [ich5_sata] = &ich5_map_db,
+ [ich6_sata] = &ich6_map_db,
+ [ich6m_sata] = &ich6m_map_db,
+ [ich8_sata] = &ich8_map_db,
+ [ich8_2port_sata] = &ich8_2port_map_db,
+ [ich8m_apple_sata] = &ich8m_apple_map_db,
+ [tolapai_sata] = &tolapai_map_db,
+ [ich8_sata_snb] = &ich8_map_db,
+ [ich8_2port_sata_snb] = &ich8_2port_map_db,
+ [ich8_2port_sata_byt] = &ich8_2port_map_db,
+};
+
+static const struct pci_bits piix_enable_bits[] = {
+ { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
+ { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */
+};
+
+MODULE_AUTHOR("Andre Hedrick, Alan Cox, Andrzej Krzysztofowicz, Jeff Garzik");
+MODULE_DESCRIPTION("SCSI low-level driver for Intel PIIX/ICH ATA controllers");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+struct ich_laptop {
+ u16 device;
+ u16 subvendor;
+ u16 subdevice;
+};
+
+/*
+ * List of laptops that use short cables rather than 80 wire
+ */
+
+static const struct ich_laptop ich_laptop[] = {
+ /* devid, subvendor, subdev */
+ { 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
+ { 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
+ { 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
+ { 0x27DF, 0x1028, 0x02b0 }, /* ICH7 on unknown Dell */
+ { 0x27DF, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
+ { 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
+ { 0x27DF, 0x103C, 0x361a }, /* ICH7 on unknown HP */
+ { 0x27DF, 0x1071, 0xD221 }, /* ICH7 on Hercules EC-900 */
+ { 0x27DF, 0x152D, 0x0778 }, /* ICH7 on unknown Intel */
+ { 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
+ { 0x24CA, 0x1025, 0x003d }, /* ICH4 on ACER TM290 */
+ { 0x24CA, 0x10CF, 0x11AB }, /* ICH4M on Fujitsu-Siemens Lifebook S6120 */
+ { 0x266F, 0x1025, 0x0066 }, /* ICH6 on ACER Aspire 1694WLMi */
+ { 0x2653, 0x1043, 0x82D8 }, /* ICH6M on Asus Eee 701 */
+ { 0x27df, 0x104d, 0x900e }, /* ICH7 on Sony TZ-90 */
+ /* end marker */
+ { 0, }
+};
+
+static int piix_port_start(struct ata_port *ap)
+{
+ if (!(ap->flags & PIIX_FLAG_PIO16))
+ ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
+
+ return ata_bmdma_port_start(ap);
+}
+
+/**
+ * ich_pata_cable_detect - Probe host controller cable detect info
+ * @ap: Port for which cable detect info is desired
+ *
+ * Read 80c cable indicator from ATA PCI device's PCI config
+ * register. This register is normally set by firmware (BIOS).
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static int ich_pata_cable_detect(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ struct piix_host_priv *hpriv = ap->host->private_data;
+ const struct ich_laptop *lap = &ich_laptop[0];
+ u8 mask;
+
+ /* Check for specials */
+ while (lap->device) {
+ if (lap->device == pdev->device &&
+ lap->subvendor == pdev->subsystem_vendor &&
+ lap->subdevice == pdev->subsystem_device)
+ return ATA_CBL_PATA40_SHORT;
+
+ lap++;
+ }
+
+ /* check BIOS cable detect results */
+ mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
+ if ((hpriv->saved_iocfg & mask) == 0)
+ return ATA_CBL_PATA40;
+ return ATA_CBL_PATA80;
+}
+
+/**
+ * piix_pata_prereset - prereset for PATA host controller
+ * @link: Target link
+ * @deadline: deadline jiffies for the operation
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+ if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
+ return -ENOENT;
+ return ata_sff_prereset(link, deadline);
+}
+
+static DEFINE_SPINLOCK(piix_lock);
+
+static void piix_set_timings(struct ata_port *ap, struct ata_device *adev,
+ u8 pio)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned long flags;
+ unsigned int is_slave = (adev->devno != 0);
+ unsigned int master_port= ap->port_no ? 0x42 : 0x40;
+ unsigned int slave_port = 0x44;
+ u16 master_data;
+ u8 slave_data;
+ u8 udma_enable;
+ int control = 0;
+
+ /*
+ * See Intel Document 298600-004 for the timing programing rules
+ * for ICH controllers.
+ */
+
+ static const /* ISP RTC */
+ u8 timings[][2] = { { 0, 0 },
+ { 0, 0 },
+ { 1, 0 },
+ { 2, 1 },
+ { 2, 3 }, };
+
+ if (pio >= 2)
+ control |= 1; /* TIME1 enable */
+ if (ata_pio_need_iordy(adev))
+ control |= 2; /* IE enable */
+ /* Intel specifies that the PPE functionality is for disk only */
+ if (adev->class == ATA_DEV_ATA)
+ control |= 4; /* PPE enable */
+ /*
+ * If the drive MWDMA is faster than it can do PIO then
+ * we must force PIO into PIO0
+ */
+ if (adev->pio_mode < XFER_PIO_0 + pio)
+ /* Enable DMA timing only */
+ control |= 8; /* PIO cycles in PIO0 */
+
+ spin_lock_irqsave(&piix_lock, flags);
+
+ /* PIO configuration clears DTE unconditionally. It will be
+ * programmed in set_dmamode which is guaranteed to be called
+ * after set_piomode if any DMA mode is available.
+ */
+ pci_read_config_word(dev, master_port, &master_data);
+ if (is_slave) {
+ /* clear TIME1|IE1|PPE1|DTE1 */
+ master_data &= 0xff0f;
+ /* enable PPE1, IE1 and TIME1 as needed */
+ master_data |= (control << 4);
+ pci_read_config_byte(dev, slave_port, &slave_data);
+ slave_data &= (ap->port_no ? 0x0f : 0xf0);
+ /* Load the timing nibble for this slave */
+ slave_data |= ((timings[pio][0] << 2) | timings[pio][1])
+ << (ap->port_no ? 4 : 0);
+ } else {
+ /* clear ISP|RCT|TIME0|IE0|PPE0|DTE0 */
+ master_data &= 0xccf0;
+ /* Enable PPE, IE and TIME as appropriate */
+ master_data |= control;
+ /* load ISP and RCT */
+ master_data |=
+ (timings[pio][0] << 12) |
+ (timings[pio][1] << 8);
+ }
+
+ /* Enable SITRE (separate slave timing register) */
+ master_data |= 0x4000;
+ pci_write_config_word(dev, master_port, master_data);
+ if (is_slave)
+ pci_write_config_byte(dev, slave_port, slave_data);
+
+ /* Ensure the UDMA bit is off - it will be turned back on if
+ UDMA is selected */
+
+ if (ap->udma_mask) {
+ pci_read_config_byte(dev, 0x48, &udma_enable);
+ udma_enable &= ~(1 << (2 * ap->port_no + adev->devno));
+ pci_write_config_byte(dev, 0x48, udma_enable);
+ }
+
+ spin_unlock_irqrestore(&piix_lock, flags);
+}
+
+/**
+ * piix_set_piomode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: Drive in question
+ *
+ * Set PIO mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ piix_set_timings(ap, adev, adev->pio_mode - XFER_PIO_0);
+}
+
+/**
+ * do_pata_set_dmamode - Initialize host controller PATA PIO timings
+ * @ap: Port whose timings we are configuring
+ * @adev: Drive in question
+ * @isich: set if the chip is an ICH device
+ *
+ * Set UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, int isich)
+{
+ struct pci_dev *dev = to_pci_dev(ap->host->dev);
+ unsigned long flags;
+ u8 speed = adev->dma_mode;
+ int devid = adev->devno + 2 * ap->port_no;
+ u8 udma_enable = 0;
+
+ if (speed >= XFER_UDMA_0) {
+ unsigned int udma = speed - XFER_UDMA_0;
+ u16 udma_timing;
+ u16 ideconf;
+ int u_clock, u_speed;
+
+ spin_lock_irqsave(&piix_lock, flags);
+
+ pci_read_config_byte(dev, 0x48, &udma_enable);
+
+ /*
+ * UDMA is handled by a combination of clock switching and
+ * selection of dividers
+ *
+ * Handy rule: Odd modes are UDMATIMx 01, even are 02
+ * except UDMA0 which is 00
+ */
+ u_speed = min(2 - (udma & 1), udma);
+ if (udma == 5)
+ u_clock = 0x1000; /* 100Mhz */
+ else if (udma > 2)
+ u_clock = 1; /* 66Mhz */
+ else
+ u_clock = 0; /* 33Mhz */
+
+ udma_enable |= (1 << devid);
+
+ /* Load the CT/RP selection */
+ pci_read_config_word(dev, 0x4A, &udma_timing);
+ udma_timing &= ~(3 << (4 * devid));
+ udma_timing |= u_speed << (4 * devid);
+ pci_write_config_word(dev, 0x4A, udma_timing);
+
+ if (isich) {
+ /* Select a 33/66/100Mhz clock */
+ pci_read_config_word(dev, 0x54, &ideconf);
+ ideconf &= ~(0x1001 << devid);
+ ideconf |= u_clock << devid;
+ /* For ICH or later we should set bit 10 for better
+ performance (WR_PingPong_En) */
+ pci_write_config_word(dev, 0x54, ideconf);
+ }
+
+ pci_write_config_byte(dev, 0x48, udma_enable);
+
+ spin_unlock_irqrestore(&piix_lock, flags);
+ } else {
+ /* MWDMA is driven by the PIO timings. */
+ unsigned int mwdma = speed - XFER_MW_DMA_0;
+ const unsigned int needed_pio[3] = {
+ XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
+ };
+ int pio = needed_pio[mwdma] - XFER_PIO_0;
+
+ /* XFER_PIO_0 is never used currently */
+ piix_set_timings(ap, adev, pio);
+ }
+}
+
+/**
+ * piix_set_dmamode - Initialize host controller PATA DMA timings
+ * @ap: Port whose timings we are configuring
+ * @adev: um
+ *
+ * Set MW/UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ do_pata_set_dmamode(ap, adev, 0);
+}
+
+/**
+ * ich_set_dmamode - Initialize host controller PATA DMA timings
+ * @ap: Port whose timings we are configuring
+ * @adev: um
+ *
+ * Set MW/UDMA mode for device, in host controller PCI config space.
+ *
+ * LOCKING:
+ * None (inherited from caller).
+ */
+
+static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+ do_pata_set_dmamode(ap, adev, 1);
+}
+
+/*
+ * Serial ATA Index/Data Pair Superset Registers access
+ *
+ * Beginning from ICH8, there's a sane way to access SCRs using index
+ * and data register pair located at BAR5 which means that we have
+ * separate SCRs for master and slave. This is handled using libata
+ * slave_link facility.
+ */
+static const int piix_sidx_map[] = {
+ [SCR_STATUS] = 0,
+ [SCR_ERROR] = 2,
+ [SCR_CONTROL] = 1,
+};
+
+static void piix_sidpr_sel(struct ata_link *link, unsigned int reg)
+{
+ struct ata_port *ap = link->ap;
+ struct piix_host_priv *hpriv = ap->host->private_data;
+
+ iowrite32(((ap->port_no * 2 + link->pmp) << 8) | piix_sidx_map[reg],
+ hpriv->sidpr + PIIX_SIDPR_IDX);
+}
+
+static int piix_sidpr_scr_read(struct ata_link *link,
+ unsigned int reg, u32 *val)
+{
+ struct piix_host_priv *hpriv = link->ap->host->private_data;
+
+ if (reg >= ARRAY_SIZE(piix_sidx_map))
+ return -EINVAL;
+
+ piix_sidpr_sel(link, reg);
+ *val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
+ return 0;
+}
+
+static int piix_sidpr_scr_write(struct ata_link *link,
+ unsigned int reg, u32 val)
+{
+ struct piix_host_priv *hpriv = link->ap->host->private_data;
+
+ if (reg >= ARRAY_SIZE(piix_sidx_map))
+ return -EINVAL;
+
+ piix_sidpr_sel(link, reg);
+ iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
+ return 0;
+}
+
+static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints)
+{
+ return sata_link_scr_lpm(link, policy, false);
+}
+
+static bool piix_irq_check(struct ata_port *ap)
+{
+ if (unlikely(!ap->ioaddr.bmdma_addr))
+ return false;
+
+ return ap->ops->bmdma_status(ap) & ATA_DMA_INTR;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int piix_broken_suspend(void)
+{
+ static const struct dmi_system_id sysids[] = {
+ {
+ .ident = "TECRA M3",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M3"),
+ },
+ },
+ {
+ .ident = "TECRA M3",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M3"),
+ },
+ },
+ {
+ .ident = "TECRA M3",
+ .matches = {
+ DMI_MATCH(DMI_OEM_STRING, "Tecra M3,"),
+ },
+ },
+ {
+ .ident = "TECRA M4",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Tecra M4"),
+ },
+ },
+ {
+ .ident = "TECRA M4",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M4"),
+ },
+ },
+ {
+ .ident = "TECRA M5",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
+ },
+ },
+ {
+ .ident = "TECRA M6",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M6"),
+ },
+ },
+ {
+ .ident = "TECRA M7",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
+ },
+ },
+ {
+ .ident = "TECRA A8",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TECRA A8"),
+ },
+ },
+ {
+ .ident = "Satellite R20",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R20"),
+ },
+ },
+ {
+ .ident = "Satellite R25",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite R25"),
+ },
+ },
+ {
+ .ident = "Satellite U200",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U200"),
+ },
+ },
+ {
+ .ident = "Satellite U200",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U200"),
+ },
+ },
+ {
+ .ident = "Satellite Pro U200",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE PRO U200"),
+ },
+ },
+ {
+ .ident = "Satellite U205",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite U205"),
+ },
+ },
+ {
+ .ident = "SATELLITE U205",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "SATELLITE U205"),
+ },
+ },
+ {
+ .ident = "Satellite Pro A120",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite Pro A120"),
+ },
+ },
+ {
+ .ident = "Portege M500",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
+ },
+ },
+ {
+ .ident = "VGN-BX297XP",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "VGN-BX297XP"),
+ },
+ },
+
+ { } /* terminate list */
+ };
+
+ if (dmi_check_system(sysids))
+ return 1;
+
+ /* TECRA M4 sometimes forgets its identify and reports bogus
+ * DMI information. As the bogus information is a bit
+ * generic, match as many entries as possible. This manual
+ * matching is necessary because dmi_system_id.matches is
+ * limited to four entries.
+ */
+ if (dmi_match(DMI_SYS_VENDOR, "TOSHIBA") &&
+ dmi_match(DMI_PRODUCT_NAME, "000000") &&
+ dmi_match(DMI_PRODUCT_VERSION, "000000") &&
+ dmi_match(DMI_PRODUCT_SERIAL, "000000") &&
+ dmi_match(DMI_BOARD_VENDOR, "TOSHIBA") &&
+ dmi_match(DMI_BOARD_NAME, "Portable PC") &&
+ dmi_match(DMI_BOARD_VERSION, "Version A0"))
+ return 1;
+
+ return 0;
+}
+
+static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+ struct ata_host *host = pci_get_drvdata(pdev);
+ unsigned long flags;
+ int rc = 0;
+
+ rc = ata_host_suspend(host, mesg);
+ if (rc)
+ return rc;
+
+ /* Some braindamaged ACPI suspend implementations expect the
+ * controller to be awake on entry; otherwise, it burns cpu
+ * cycles and power trying to do something to the sleeping
+ * beauty.
+ */
+ if (piix_broken_suspend() && (mesg.event & PM_EVENT_SLEEP)) {
+ pci_save_state(pdev);
+
+ /* mark its power state as "unknown", since we don't
+ * know if e.g. the BIOS will change its device state
+ * when we suspend.
+ */
+ if (pdev->current_state == PCI_D0)
+ pdev->current_state = PCI_UNKNOWN;
+
+ /* tell resume that it's waking up from broken suspend */
+ spin_lock_irqsave(&host->lock, flags);
+ host->flags |= PIIX_HOST_BROKEN_SUSPEND;
+ spin_unlock_irqrestore(&host->lock, flags);
+ } else
+ ata_pci_device_do_suspend(pdev, mesg);
+
+ return 0;
+}
+
+static int piix_pci_device_resume(struct pci_dev *pdev)
+{
+ struct ata_host *host = pci_get_drvdata(pdev);
+ unsigned long flags;
+ int rc;
+
+ if (host->flags & PIIX_HOST_BROKEN_SUSPEND) {
+ spin_lock_irqsave(&host->lock, flags);
+ host->flags &= ~PIIX_HOST_BROKEN_SUSPEND;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ /* PCI device wasn't disabled during suspend. Use
+ * pci_reenable_device() to avoid affecting the enable
+ * count.
+ */
+ rc = pci_reenable_device(pdev);
+ if (rc)
+ dev_err(&pdev->dev,
+ "failed to enable device after resume (%d)\n",
+ rc);
+ } else
+ rc = ata_pci_device_do_resume(pdev);
+
+ if (rc == 0)
+ ata_host_resume(host);
+
+ return rc;
+}
+#endif
+
+static u8 piix_vmw_bmdma_status(struct ata_port *ap)
+{
+ return ata_bmdma_status(ap) & ~ATA_DMA_ERR;
+}
+
+static struct scsi_host_template piix_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations piix_sata_ops = {
+ .inherits = &ata_bmdma32_port_ops,
+ .sff_irq_check = piix_irq_check,
+ .port_start = piix_port_start,
+};
+
+static struct ata_port_operations piix_pata_ops = {
+ .inherits = &piix_sata_ops,
+ .cable_detect = ata_cable_40wire,
+ .set_piomode = piix_set_piomode,
+ .set_dmamode = piix_set_dmamode,
+ .prereset = piix_pata_prereset,
+};
+
+static struct ata_port_operations piix_vmw_ops = {
+ .inherits = &piix_pata_ops,
+ .bmdma_status = piix_vmw_bmdma_status,
+};
+
+static struct ata_port_operations ich_pata_ops = {
+ .inherits = &piix_pata_ops,
+ .cable_detect = ich_pata_cable_detect,
+ .set_dmamode = ich_set_dmamode,
+};
+
+static struct device_attribute *piix_sidpr_shost_attrs[] = {
+ &dev_attr_link_power_management_policy,
+ NULL
+};
+
+static struct scsi_host_template piix_sidpr_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+ .shost_attrs = piix_sidpr_shost_attrs,
+};
+
+static struct ata_port_operations piix_sidpr_sata_ops = {
+ .inherits = &piix_sata_ops,
+ .hardreset = sata_std_hardreset,
+ .scr_read = piix_sidpr_scr_read,
+ .scr_write = piix_sidpr_scr_write,
+ .set_lpm = piix_sidpr_set_lpm,
+};
+
+static struct ata_port_info piix_port_info[] = {
+ [piix_pata_mwdma] = /* PIIX3 MWDMA only */
+ {
+ .flags = PIIX_PATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
+ .port_ops = &piix_pata_ops,
+ },
+
+ [piix_pata_33] = /* PIIX4 at 33MHz */
+ {
+ .flags = PIIX_PATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
+ .udma_mask = ATA_UDMA2,
+ .port_ops = &piix_pata_ops,
+ },
+
+ [ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
+ {
+ .flags = PIIX_PATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY, /* Check: maybe MWDMA0 is ok */
+ .udma_mask = ATA_UDMA2,
+ .port_ops = &ich_pata_ops,
+ },
+
+ [ich_pata_66] = /* ICH controllers up to 66MHz */
+ {
+ .flags = PIIX_PATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY, /* MWDMA0 is broken on chip */
+ .udma_mask = ATA_UDMA4,
+ .port_ops = &ich_pata_ops,
+ },
+
+ [ich_pata_100] =
+ {
+ .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY,
+ .udma_mask = ATA_UDMA5,
+ .port_ops = &ich_pata_ops,
+ },
+
+ [ich_pata_100_nomwdma1] =
+ {
+ .flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2_ONLY,
+ .udma_mask = ATA_UDMA5,
+ .port_ops = &ich_pata_ops,
+ },
+
+ [ich5_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich6_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich6m_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich8_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich8_2port_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [tolapai_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich8m_apple_sata] =
+ {
+ .flags = PIIX_SATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [piix_pata_vmw] =
+ {
+ .flags = PIIX_PATA_FLAGS,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA12_ONLY, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
+ .udma_mask = ATA_UDMA2,
+ .port_ops = &piix_vmw_ops,
+ },
+
+ /*
+ * some Sandybridge chipsets have broken 32 mode up to now,
+ * see https://bugzilla.kernel.org/show_bug.cgi?id=40592
+ */
+ [ich8_sata_snb] =
+ {
+ .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich8_2port_sata_snb] =
+ {
+ .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR
+ | PIIX_FLAG_PIO16,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+ [ich8_2port_sata_byt] =
+ {
+ .flags = PIIX_SATA_FLAGS | PIIX_FLAG_SIDPR | PIIX_FLAG_PIO16,
+ .pio_mask = ATA_PIO4,
+ .mwdma_mask = ATA_MWDMA2,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &piix_sata_ops,
+ },
+
+};
+
+#define AHCI_PCI_BAR 5
+#define AHCI_GLOBAL_CTL 0x04
+#define AHCI_ENABLE (1 << 31)
+static int piix_disable_ahci(struct pci_dev *pdev)
+{
+ void __iomem *mmio;
+ u32 tmp;
+ int rc = 0;
+
+ /* BUG: pci_enable_device has not yet been called. This
+ * works because this device is usually set up by BIOS.
+ */
+
+ if (!pci_resource_start(pdev, AHCI_PCI_BAR) ||
+ !pci_resource_len(pdev, AHCI_PCI_BAR))
+ return 0;
+
+ mmio = pci_iomap(pdev, AHCI_PCI_BAR, 64);
+ if (!mmio)
+ return -ENOMEM;
+
+ tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
+ if (tmp & AHCI_ENABLE) {
+ tmp &= ~AHCI_ENABLE;
+ iowrite32(tmp, mmio + AHCI_GLOBAL_CTL);
+
+ tmp = ioread32(mmio + AHCI_GLOBAL_CTL);
+ if (tmp & AHCI_ENABLE)
+ rc = -EIO;
+ }
+
+ pci_iounmap(pdev, mmio);
+ return rc;
+}
+
+/**
+ * piix_check_450nx_errata - Check for problem 450NX setup
+ * @ata_dev: the PCI device to check
+ *
+ * Check for the present of 450NX errata #19 and errata #25. If
+ * they are found return an error code so we can turn off DMA
+ */
+
+static int piix_check_450nx_errata(struct pci_dev *ata_dev)
+{
+ struct pci_dev *pdev = NULL;
+ u16 cfg;
+ int no_piix_dma = 0;
+
+ while ((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) {
+ /* Look for 450NX PXB. Check for problem configurations
+ A PCI quirk checks bit 6 already */
+ pci_read_config_word(pdev, 0x41, &cfg);
+ /* Only on the original revision: IDE DMA can hang */
+ if (pdev->revision == 0x00)
+ no_piix_dma = 1;
+ /* On all revisions below 5 PXB bus lock must be disabled for IDE */
+ else if (cfg & (1<<14) && pdev->revision < 5)
+ no_piix_dma = 2;
+ }
+ if (no_piix_dma)
+ dev_warn(&ata_dev->dev,
+ "450NX errata present, disabling IDE DMA%s\n",
+ no_piix_dma == 2 ? " - a BIOS update may resolve this"
+ : "");
+
+ return no_piix_dma;
+}
+
+static void piix_init_pcs(struct ata_host *host,
+ const struct piix_map_db *map_db)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ u16 pcs, new_pcs;
+
+ pci_read_config_word(pdev, ICH5_PCS, &pcs);
+
+ new_pcs = pcs | map_db->port_enable;
+
+ if (new_pcs != pcs) {
+ DPRINTK("updating PCS from 0x%x to 0x%x\n", pcs, new_pcs);
+ pci_write_config_word(pdev, ICH5_PCS, new_pcs);
+ msleep(150);
+ }
+}
+
+static const int *piix_init_sata_map(struct pci_dev *pdev,
+ struct ata_port_info *pinfo,
+ const struct piix_map_db *map_db)
+{
+ const int *map;
+ int i, invalid_map = 0;
+ u8 map_value;
+ char buf[32];
+ char *p = buf, *end = buf + sizeof(buf);
+
+ pci_read_config_byte(pdev, ICH5_PMR, &map_value);
+
+ map = map_db->map[map_value & map_db->mask];
+
+ for (i = 0; i < 4; i++) {
+ switch (map[i]) {
+ case RV:
+ invalid_map = 1;
+ p += scnprintf(p, end - p, " XX");
+ break;
+
+ case NA:
+ p += scnprintf(p, end - p, " --");
+ break;
+
+ case IDE:
+ WARN_ON((i & 1) || map[i + 1] != IDE);
+ pinfo[i / 2] = piix_port_info[ich_pata_100];
+ i++;
+ p += scnprintf(p, end - p, " IDE IDE");
+ break;
+
+ default:
+ p += scnprintf(p, end - p, " P%d", map[i]);
+ if (i & 1)
+ pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
+ break;
+ }
+ }
+ dev_info(&pdev->dev, "MAP [%s ]\n", buf);
+
+ if (invalid_map)
+ dev_err(&pdev->dev, "invalid MAP value %u\n", map_value);
+
+ return map;
+}
+
+static bool piix_no_sidpr(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+
+ /*
+ * Samsung DB-P70 only has three ATA ports exposed and
+ * curiously the unconnected first port reports link online
+ * while not responding to SRST protocol causing excessive
+ * detection delay.
+ *
+ * Unfortunately, the system doesn't carry enough DMI
+ * information to identify the machine but does have subsystem
+ * vendor and device set. As it's unclear whether the
+ * subsystem vendor/device is used only for this specific
+ * board, the port can't be disabled solely with the
+ * information; however, turning off SIDPR access works around
+ * the problem. Turn it off.
+ *
+ * This problem is reported in bnc#441240.
+ *
+ * https://bugzilla.novell.com/show_bug.cgi?id=441420
+ */
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2920 &&
+ pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG &&
+ pdev->subsystem_device == 0xb049) {
+ dev_warn(host->dev,
+ "Samsung DB-P70 detected, disabling SIDPR\n");
+ return true;
+ }
+
+ return false;
+}
+
+static int piix_init_sidpr(struct ata_host *host)
+{
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ struct piix_host_priv *hpriv = host->private_data;
+ struct ata_link *link0 = &host->ports[0]->link;
+ u32 scontrol;
+ int i, rc;
+
+ /* check for availability */
+ for (i = 0; i < 4; i++)
+ if (hpriv->map[i] == IDE)
+ return 0;
+
+ /* is it blacklisted? */
+ if (piix_no_sidpr(host))
+ return 0;
+
+ if (!(host->ports[0]->flags & PIIX_FLAG_SIDPR))
+ return 0;
+
+ if (pci_resource_start(pdev, PIIX_SIDPR_BAR) == 0 ||
+ pci_resource_len(pdev, PIIX_SIDPR_BAR) != PIIX_SIDPR_LEN)
+ return 0;
+
+ if (pcim_iomap_regions(pdev, 1 << PIIX_SIDPR_BAR, DRV_NAME))
+ return 0;
+
+ hpriv->sidpr = pcim_iomap_table(pdev)[PIIX_SIDPR_BAR];
+
+ /* SCR access via SIDPR doesn't work on some configurations.
+ * Give it a test drive by inhibiting power save modes which
+ * we'll do anyway.
+ */
+ piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
+
+ /* if IPM is already 3, SCR access is probably working. Don't
+ * un-inhibit power save modes as BIOS might have inhibited
+ * them for a reason.
+ */
+ if ((scontrol & 0xf00) != 0x300) {
+ scontrol |= 0x300;
+ piix_sidpr_scr_write(link0, SCR_CONTROL, scontrol);
+ piix_sidpr_scr_read(link0, SCR_CONTROL, &scontrol);
+
+ if ((scontrol & 0xf00) != 0x300) {
+ dev_info(host->dev,
+ "SCR access via SIDPR is available but doesn't work\n");
+ return 0;
+ }
+ }
+
+ /* okay, SCRs available, set ops and ask libata for slave_link */
+ for (i = 0; i < 2; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ ap->ops = &piix_sidpr_sata_ops;
+
+ if (ap->flags & ATA_FLAG_SLAVE_POSS) {
+ rc = ata_slave_link_init(ap);
+ if (rc)
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static void piix_iocfg_bit18_quirk(struct ata_host *host)
+{
+ static const struct dmi_system_id sysids[] = {
+ {
+ /* Clevo M570U sets IOCFG bit 18 if the cdrom
+ * isn't used to boot the system which
+ * disables the channel.
+ */
+ .ident = "M570U",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Clevo Co."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "M570U"),
+ },
+ },
+
+ { } /* terminate list */
+ };
+ struct pci_dev *pdev = to_pci_dev(host->dev);
+ struct piix_host_priv *hpriv = host->private_data;
+
+ if (!dmi_check_system(sysids))
+ return;
+
+ /* The datasheet says that bit 18 is NOOP but certain systems
+ * seem to use it to disable a channel. Clear the bit on the
+ * affected systems.
+ */
+ if (hpriv->saved_iocfg & (1 << 18)) {
+ dev_info(&pdev->dev, "applying IOCFG bit18 quirk\n");
+ pci_write_config_dword(pdev, PIIX_IOCFG,
+ hpriv->saved_iocfg & ~(1 << 18));
+ }
+}
+
+static bool piix_broken_system_poweroff(struct pci_dev *pdev)
+{
+ static const struct dmi_system_id broken_systems[] = {
+ {
+ .ident = "HP Compaq 2510p",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 2510p"),
+ },
+ /* PCI slot number of the controller */
+ .driver_data = (void *)0x1FUL,
+ },
+ {
+ .ident = "HP Compaq nc6000",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nc6000"),
+ },
+ /* PCI slot number of the controller */
+ .driver_data = (void *)0x1FUL,
+ },
+
+ { } /* terminate list */
+ };
+ const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
+
+ if (dmi) {
+ unsigned long slot = (unsigned long)dmi->driver_data;
+ /* apply the quirk only to on-board controllers */
+ return slot == PCI_SLOT(pdev->devfn);
+ }
+
+ return false;
+}
+
+static int prefer_ms_hyperv = 1;
+module_param(prefer_ms_hyperv, int, 0);
+MODULE_PARM_DESC(prefer_ms_hyperv,
+ "Prefer Hyper-V paravirtualization drivers instead of ATA, "
+ "0 - Use ATA drivers, "
+ "1 (Default) - Use the paravirtualization drivers.");
+
+static void piix_ignore_devices_quirk(struct ata_host *host)
+{
+#if IS_ENABLED(CONFIG_HYPERV_STORAGE)
+ static const struct dmi_system_id ignore_hyperv[] = {
+ {
+ /* On Hyper-V hypervisors the disks are exposed on
+ * both the emulated SATA controller and on the
+ * paravirtualised drivers. The CD/DVD devices
+ * are only exposed on the emulated controller.
+ * Request we ignore ATA devices on this host.
+ */
+ .ident = "Hyper-V Virtual Machine",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR,
+ "Microsoft Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
+ },
+ },
+ { } /* terminate list */
+ };
+ static const struct dmi_system_id allow_virtual_pc[] = {
+ {
+ /* In MS Virtual PC guests the DMI ident is nearly
+ * identical to a Hyper-V guest. One difference is the
+ * product version which is used here to identify
+ * a Virtual PC guest. This entry allows ata_piix to
+ * drive the emulated hardware.
+ */
+ .ident = "MS Virtual PC 2007",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR,
+ "Microsoft Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Virtual Machine"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "VS2005R2"),
+ },
+ },
+ { } /* terminate list */
+ };
+ const struct dmi_system_id *ignore = dmi_first_match(ignore_hyperv);
+ const struct dmi_system_id *allow = dmi_first_match(allow_virtual_pc);
+
+ if (ignore && !allow && prefer_ms_hyperv) {
+ host->flags |= ATA_HOST_IGNORE_ATA;
+ dev_info(host->dev, "%s detected, ATA device ignore set\n",
+ ignore->ident);
+ }
+#endif
+}
+
+/**
+ * piix_init_one - Register PIIX ATA PCI device with kernel services
+ * @pdev: PCI device to register
+ * @ent: Entry in piix_pci_tbl matching with @pdev
+ *
+ * Called from kernel PCI layer. We probe for combined mode (sigh),
+ * and then hand over control to libata, for it to do the rest.
+ *
+ * LOCKING:
+ * Inherited from PCI layer (may sleep).
+ *
+ * RETURNS:
+ * Zero on success, or -ERRNO value.
+ */
+
+static int piix_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct device *dev = &pdev->dev;
+ struct ata_port_info port_info[2];
+ const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
+ struct scsi_host_template *sht = &piix_sht;
+ unsigned long port_flags;
+ struct ata_host *host;
+ struct piix_host_priv *hpriv;
+ int rc;
+
+ ata_print_version_once(&pdev->dev, DRV_VERSION);
+
+ /* no hotplugging support for later devices (FIXME) */
+ if (!in_module_init && ent->driver_data >= ich5_sata)
+ return -ENODEV;
+
+ if (piix_broken_system_poweroff(pdev)) {
+ piix_port_info[ent->driver_data].flags |=
+ ATA_FLAG_NO_POWEROFF_SPINDOWN |
+ ATA_FLAG_NO_HIBERNATE_SPINDOWN;
+ dev_info(&pdev->dev, "quirky BIOS, skipping spindown "
+ "on poweroff and hibernation\n");
+ }
+
+ port_info[0] = piix_port_info[ent->driver_data];
+ port_info[1] = piix_port_info[ent->driver_data];
+
+ port_flags = port_info[0].flags;
+
+ /* enable device and prepare host */
+ rc = pcim_enable_device(pdev);
+ if (rc)
+ return rc;
+
+ hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
+ if (!hpriv)
+ return -ENOMEM;
+
+ /* Save IOCFG, this will be used for cable detection, quirk
+ * detection and restoration on detach. This is necessary
+ * because some ACPI implementations mess up cable related
+ * bits on _STM. Reported on kernel bz#11879.
+ */
+ pci_read_config_dword(pdev, PIIX_IOCFG, &hpriv->saved_iocfg);
+
+ /* ICH6R may be driven by either ata_piix or ahci driver
+ * regardless of BIOS configuration. Make sure AHCI mode is
+ * off.
+ */
+ if (pdev->vendor == PCI_VENDOR_ID_INTEL && pdev->device == 0x2652) {
+ rc = piix_disable_ahci(pdev);
+ if (rc)
+ return rc;
+ }
+
+ /* SATA map init can change port_info, do it before prepping host */
+ if (port_flags & ATA_FLAG_SATA)
+ hpriv->map = piix_init_sata_map(pdev, port_info,
+ piix_map_db_table[ent->driver_data]);
+
+ rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
+ if (rc)
+ return rc;
+ host->private_data = hpriv;
+
+ /* initialize controller */
+ if (port_flags & ATA_FLAG_SATA) {
+ piix_init_pcs(host, piix_map_db_table[ent->driver_data]);
+ rc = piix_init_sidpr(host);
+ if (rc)
+ return rc;
+ if (host->ports[0]->ops == &piix_sidpr_sata_ops)
+ sht = &piix_sidpr_sht;
+ }
+
+ /* apply IOCFG bit18 quirk */
+ piix_iocfg_bit18_quirk(host);
+
+ /* On ICH5, some BIOSen disable the interrupt using the
+ * PCI_COMMAND_INTX_DISABLE bit added in PCI 2.3.
+ * On ICH6, this bit has the same effect, but only when
+ * MSI is disabled (and it is disabled, as we don't use
+ * message-signalled interrupts currently).
+ */
+ if (port_flags & PIIX_FLAG_CHECKINTR)
+ pci_intx(pdev, 1);
+
+ if (piix_check_450nx_errata(pdev)) {
+ /* This writes into the master table but it does not
+ really matter for this errata as we will apply it to
+ all the PIIX devices on the board */
+ host->ports[0]->mwdma_mask = 0;
+ host->ports[0]->udma_mask = 0;
+ host->ports[1]->mwdma_mask = 0;
+ host->ports[1]->udma_mask = 0;
+ }
+ host->flags |= ATA_HOST_PARALLEL_SCAN;
+
+ /* Allow hosts to specify device types to ignore when scanning. */
+ piix_ignore_devices_quirk(host);
+
+ pci_set_master(pdev);
+ return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
+}
+
+static void piix_remove_one(struct pci_dev *pdev)
+{
+ struct ata_host *host = pci_get_drvdata(pdev);
+ struct piix_host_priv *hpriv = host->private_data;
+
+ pci_write_config_dword(pdev, PIIX_IOCFG, hpriv->saved_iocfg);
+
+ ata_pci_remove_one(pdev);
+}
+
+static struct pci_driver piix_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = piix_pci_tbl,
+ .probe = piix_init_one,
+ .remove = piix_remove_one,
+#ifdef CONFIG_PM_SLEEP
+ .suspend = piix_pci_device_suspend,
+ .resume = piix_pci_device_resume,
+#endif
+};
+
+static int __init piix_init(void)
+{
+ int rc;
+
+ DPRINTK("pci_register_driver\n");
+ rc = pci_register_driver(&piix_pci_driver);
+ if (rc)
+ return rc;
+
+ in_module_init = 0;
+
+ DPRINTK("done\n");
+ return 0;
+}
+
+static void __exit piix_exit(void)
+{
+ pci_unregister_driver(&piix_pci_driver);
+}
+
+module_init(piix_init);
+module_exit(piix_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 22:10:15 +0000