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gerrit-public.fairphone.software / kernel / msm / de753e5e8678d9674de0a3bda9ead9e770fdbf53 / . / drivers / ata / ata_piix.c
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/*
* ata_piix.c - Intel PATA/SATA controllers
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* 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 <alan@redhat.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* libata documentation is available via 'make {ps|pdf}docs',
* as Documentation/DocBook/libata.*
*
* Hardware documentation available at http://developer.intel.com/
*
* Documentation
* Publically available from Intel web site. Errata documentation
* is also publically 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 orginal Triton
* series chipsets do _not_ support independant 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 independant 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
*
* 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 <scsi/scsi_host.h>
#include <linux/libata.h>
#include <linux/dmi.h>
#define DRV_NAME "ata_piix"
#define DRV_VERSION "2.12"
enum {
PIIX_IOCFG = 0x54, /* IDE I/O configuration register */
ICH5_PMR = 0x90, /* port mapping register */
ICH5_PCS = 0x92, /* port control and status */
PIIX_SCC = 0x0A, /* sub-class code register */
PIIX_FLAG_SCR = (1 << 26), /* SCR available */
PIIX_FLAG_AHCI = (1 << 27), /* AHCI possible */
PIIX_FLAG_CHECKINTR = (1 << 28), /* make sure PCI INTx enabled */
PIIX_PATA_FLAGS = ATA_FLAG_SLAVE_POSS,
PIIX_SATA_FLAGS = ATA_FLAG_SATA | PIIX_FLAG_CHECKINTR,
/* combined mode. if set, PATA is channel 0.
* if clear, PATA is channel 1.
*/
PIIX_PORT_ENABLED = (1 << 0),
PIIX_PORT_PRESENT = (1 << 4),
PIIX_80C_PRI = (1 << 5) | (1 << 4),
PIIX_80C_SEC = (1 << 7) | (1 << 6),
/* controller IDs */
piix_pata_33 = 0, /* PIIX4 at 33Mhz */
ich_pata_33 = 1, /* ICH up to UDMA 33 only */
ich_pata_66 = 2, /* ICH up to 66 Mhz */
ich_pata_100 = 3, /* ICH up to UDMA 100 */
ich5_sata = 5,
ich6_sata = 6,
ich6_sata_ahci = 7,
ich6m_sata_ahci = 8,
ich8_sata_ahci = 9,
piix_pata_mwdma = 10, /* PIIX3 MWDMA only */
tolapai_sata_ahci = 11,
ich9_2port_sata = 12,
/* 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 avaliable */
RV = -3, /* reserved */
PIIX_AHCI_DEVICE = 6,
/* host->flags bits */
PIIX_HOST_BROKEN_SUSPEND = (1 << 24),
};
struct piix_map_db {
const u32 mask;
const u16 port_enable;
const int map[][4];
};
struct piix_host_priv {
const int *map;
};
static int piix_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent);
static void piix_pata_error_handler(struct ata_port *ap);
static void piix_set_piomode(struct ata_port *ap, struct ata_device *adev);
static void piix_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static void ich_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static int ich_pata_cable_detect(struct ata_port *ap);
#ifdef CONFIG_PM
static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
static int piix_pci_device_resume(struct pci_dev *pdev);
#endif
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 },
/* 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 (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 },
{ 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* ICH8 Mobile PATA Controller */
{ 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* NOTE: The following PCI ids must be kept in sync with the
* list in drivers/pci/quirks.c.
*/
/* 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_ahci },
/* 82801FBM ICH6M (ICH6R with only port 0 and 2 implemented) */
{ 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
/* 82801GB/GR/GH (ICH7, identical to ICH6) */
{ 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
/* 2801GBM/GHM (ICH7M, identical to ICH6M) */
{ 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6m_sata_ahci },
/* Enterprise Southbridge 2 (631xESB/632xESB) */
{ 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci },
/* SATA Controller 1 IDE (ICH8) */
{ 0x8086, 0x2820, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller 2 IDE (ICH8) */
{ 0x8086, 0x2825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
/* Mobile SATA Controller IDE (ICH8M) */
{ 0x8086, 0x2828, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (ICH9) */
{ 0x8086, 0x2920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (ICH9) */
{ 0x8086, 0x2921, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
/* SATA Controller IDE (ICH9) */
{ 0x8086, 0x2926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x2928, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x292d, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich9_2port_sata },
/* SATA Controller IDE (ICH9M) */
{ 0x8086, 0x292e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich8_sata_ahci },
/* SATA Controller IDE (Tolapai) */
{ 0x8086, 0x5028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, tolapai_sata_ahci },
{ } /* terminate list */
};
static struct pci_driver piix_pci_driver = {
.name = DRV_NAME,
.id_table = piix_pci_tbl,
.probe = piix_init_one,
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = piix_pci_device_suspend,
.resume = piix_pci_device_resume,
#endif
};
static struct scsi_host_template piix_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
static const struct ata_port_operations piix_pata_ops = {
.set_piomode = piix_set_piomode,
.set_dmamode = piix_set_dmamode,
.mode_filter = ata_pci_default_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = piix_pata_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_port_start,
};
static const struct ata_port_operations ich_pata_ops = {
.set_piomode = piix_set_piomode,
.set_dmamode = ich_set_dmamode,
.mode_filter = ata_pci_default_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = piix_pata_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ich_pata_cable_detect,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_port_start,
};
static const struct ata_port_operations piix_sata_ops = {
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_port_start,
};
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 = 0x3,
.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 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 ich9_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 *piix_map_db_table[] = {
[ich5_sata] = &ich5_map_db,
[ich6_sata] = &ich6_map_db,
[ich6_sata_ahci] = &ich6_map_db,
[ich6m_sata_ahci] = &ich6m_map_db,
[ich8_sata_ahci] = &ich8_map_db,
[tolapai_sata_ahci] = &tolapai_map_db,
[ich9_2port_sata] = &ich9_2port_map_db,
};
static struct ata_port_info piix_port_info[] = {
[piix_pata_33] = /* PIIX4 at 33MHz */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.udma_mask = ATA_UDMA_MASK_40C,
.port_ops = &piix_pata_ops,
},
[ich_pata_33] = /* ICH0 - ICH at 33Mhz*/
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio 0-4 */
.mwdma_mask = 0x06, /* Check: maybe 0x07 */
.udma_mask = ATA_UDMA2, /* UDMA33 */
.port_ops = &ich_pata_ops,
},
[ich_pata_66] = /* ICH controllers up to 66MHz */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio 0-4 */
.mwdma_mask = 0x06, /* MWDMA0 is broken on chip */
.udma_mask = ATA_UDMA4,
.port_ops = &ich_pata_ops,
},
[ich_pata_100] =
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS | PIIX_FLAG_CHECKINTR,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 */
.udma_mask = ATA_UDMA5, /* udma0-5 */
.port_ops = &ich_pata_ops,
},
[ich5_sata] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich6_sata] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich6_sata_ahci] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich6m_sata_ahci] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich8_sata_ahci] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[piix_pata_mwdma] = /* PIIX3 MWDMA only */
{
.sht = &piix_sht,
.flags = PIIX_PATA_FLAGS,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x06, /* mwdma1-2 ?? CHECK 0 should be ok but slow */
.port_ops = &piix_pata_ops,
},
[tolapai_sata_ahci] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
[ich9_2port_sata] =
{
.sht = &piix_sht,
.flags = PIIX_SATA_FLAGS | PIIX_FLAG_SCR |
PIIX_FLAG_AHCI,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma0-2 */
.udma_mask = ATA_UDMA6,
.port_ops = &piix_sata_ops,
},
};
static 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, 0x1043, 0x1267 }, /* ICH7 on Asus W5F */
{ 0x27DF, 0x103C, 0x30A1 }, /* ICH7 on HP Compaq nc2400 */
{ 0x24CA, 0x1025, 0x0061 }, /* ICH4 on ACER Aspire 2023WLMi */
/* end marker */
{ 0, }
};
/**
* 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);
const struct ich_laptop *lap = &ich_laptop[0];
u8 tmp, mask;
/* Check for specials - Acer Aspire 5602WLMi */
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;
pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
if ((tmp & 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_std_prereset(link, deadline);
}
static void piix_pata_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, piix_pata_prereset, ata_std_softreset, NULL,
ata_std_postreset);
}
/**
* piix_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: um
*
* 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)
{
unsigned int pio = adev->pio_mode - XFER_PIO_0;
struct pci_dev *dev = to_pci_dev(ap->host->dev);
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 */
/* 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 SITRE (seperate slave timing register) */
master_data |= 0x4000;
/* 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);
}
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);
}
}
/**
* do_pata_set_dmamode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: Drive in question
* @udma: udma mode, 0 - 6
* @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);
u8 master_port = ap->port_no ? 0x42 : 0x40;
u16 master_data;
u8 speed = adev->dma_mode;
int devid = adev->devno + 2 * ap->port_no;
u8 udma_enable = 0;
static const /* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
pci_read_config_word(dev, master_port, &master_data);
if (ap->udma_mask)
pci_read_config_byte(dev, 0x48, &udma_enable);
if (speed >= XFER_UDMA_0) {
unsigned int udma = adev->dma_mode - XFER_UDMA_0;
u16 udma_timing;
u16 ideconf;
int u_clock, u_speed;
/*
* 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);
}
} else {
/*
* MWDMA is driven by the PIO timings. We must also enable
* IORDY unconditionally along with TIME1. PPE has already
* been set when the PIO timing was set.
*/
unsigned int mwdma = adev->dma_mode - XFER_MW_DMA_0;
unsigned int control;
u8 slave_data;
const unsigned int needed_pio[3] = {
XFER_PIO_0, XFER_PIO_3, XFER_PIO_4
};
int pio = needed_pio[mwdma] - XFER_PIO_0;
control = 3; /* IORDY|TIME1 */
/* If the drive MWDMA is faster than it can do PIO then
we must force PIO into PIO0 */
if (adev->pio_mode < needed_pio[mwdma])
/* Enable DMA timing only */
control |= 8; /* PIO cycles in PIO0 */
if (adev->devno) { /* Slave */
master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
master_data |= control << 4;
pci_read_config_byte(dev, 0x44, &slave_data);
slave_data &= (ap->port_no ? 0x0f : 0xf0);
/* Load the matching timing */
slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
pci_write_config_byte(dev, 0x44, slave_data);
} else { /* Master */
master_data &= 0xCCF4; /* Mask out IORDY|TIME1|DMAONLY
and master timing bits */
master_data |= control;
master_data |=
(timings[pio][0] << 12) |
(timings[pio][1] << 8);
}
if (ap->udma_mask) {
udma_enable &= ~(1 << devid);
pci_write_config_word(dev, master_port, master_data);
}
}
/* Don't scribble on 0x48 if the controller does not support UDMA */
if (ap->udma_mask)
pci_write_config_byte(dev, 0x48, udma_enable);
}
/**
* 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);
}
#ifdef CONFIG_PM
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 M5",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M5"),
},
},
{
.ident = "TECRA M7",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "TECRA M7"),
},
},
{
.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 = "Portege M500",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M500"),
},
},
{ } /* terminate list */
};
static const char *oemstrs[] = {
"Tecra M3,",
};
int i;
if (dmi_check_system(sysids))
return 1;
for (i = 0; i < ARRAY_SIZE(oemstrs); i++)
if (dmi_find_device(DMI_DEV_TYPE_OEM_STRING, oemstrs[i], NULL))
return 1;
return 0;
}
static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
{
struct ata_host *host = dev_get_drvdata(&pdev->dev);
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_SUSPEND) {
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 = dev_get_drvdata(&pdev->dev);
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_printk(KERN_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
#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 = readl(mmio + AHCI_GLOBAL_CTL);
if (tmp & AHCI_ENABLE) {
tmp &= ~AHCI_ENABLE;
writel(tmp, mmio + AHCI_GLOBAL_CTL);
tmp = readl(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 __devinit 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_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n");
if (no_piix_dma == 2)
dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n");
return no_piix_dma;
}
static void __devinit piix_init_pcs(struct pci_dev *pdev,
struct ata_port_info *pinfo,
const struct piix_map_db *map_db)
{
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 void __devinit piix_init_sata_map(struct pci_dev *pdev,
struct ata_port_info *pinfo,
const struct piix_map_db *map_db)
{
struct piix_host_priv *hpriv = pinfo[0].private_data;
const int *map;
int i, invalid_map = 0;
u8 map_value;
pci_read_config_byte(pdev, ICH5_PMR, &map_value);
map = map_db->map[map_value & map_db->mask];
dev_printk(KERN_INFO, &pdev->dev, "MAP [");
for (i = 0; i < 4; i++) {
switch (map[i]) {
case RV:
invalid_map = 1;
printk(" XX");
break;
case NA:
printk(" --");
break;
case IDE:
WARN_ON((i & 1) || map[i + 1] != IDE);
pinfo[i / 2] = piix_port_info[ich_pata_100];
pinfo[i / 2].private_data = hpriv;
i++;
printk(" IDE IDE");
break;
default:
printk(" P%d", map[i]);
if (i & 1)
pinfo[i / 2].flags |= ATA_FLAG_SLAVE_POSS;
break;
}
}
printk(" ]\n");
if (invalid_map)
dev_printk(KERN_ERR, &pdev->dev,
"invalid MAP value %u\n", map_value);
hpriv->map = map;
}
static void piix_iocfg_bit18_quirk(struct pci_dev *pdev)
{
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 */
};
u32 iocfg;
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.
*/
pci_read_config_dword(pdev, PIIX_IOCFG, &iocfg);
if (iocfg & (1 << 18)) {
dev_printk(KERN_INFO, &pdev->dev,
"applying IOCFG bit18 quirk\n");
iocfg &= ~(1 << 18);
pci_write_config_dword(pdev, PIIX_IOCFG, iocfg);
}
}
/**
* 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)
{
static int printed_version;
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 piix_host_priv *hpriv;
unsigned long port_flags;
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev,
"version " DRV_VERSION "\n");
/* no hotplugging support (FIXME) */
if (!in_module_init)
return -ENODEV;
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv)
return -ENOMEM;
port_info[0] = piix_port_info[ent->driver_data];
port_info[1] = piix_port_info[ent->driver_data];
port_info[0].private_data = hpriv;
port_info[1].private_data = hpriv;
port_flags = port_info[0].flags;
if (port_flags & PIIX_FLAG_AHCI) {
u8 tmp;
pci_read_config_byte(pdev, PIIX_SCC, &tmp);
if (tmp == PIIX_AHCI_DEVICE) {
int rc = piix_disable_ahci(pdev);
if (rc)
return rc;
}
}
/* Initialize SATA map */
if (port_flags & ATA_FLAG_SATA) {
piix_init_sata_map(pdev, port_info,
piix_map_db_table[ent->driver_data]);
piix_init_pcs(pdev, port_info,
piix_map_db_table[ent->driver_data]);
}
/* apply IOCFG bit18 quirk */
piix_iocfg_bit18_quirk(pdev);
/* 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 */
port_info[0].mwdma_mask = 0;
port_info[0].udma_mask = 0;
port_info[1].mwdma_mask = 0;
port_info[1].udma_mask = 0;
}
return ata_pci_init_one(pdev, ppi);
}
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);