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linux/drivers/ide/via82cxxx.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

538 lines
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/*
* VIA IDE driver for Linux. Supported southbridges:
*
* vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
* vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
* vt8235, vt8237, vt8237a
*
* Copyright (c) 2000-2002 Vojtech Pavlik
* Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
*
* Based on the work of:
* Michel Aubry
* Jeff Garzik
* Andre Hedrick
*
* Documentation:
* Obsolete device documentation publically available from via.com.tw
* Current device documentation available under NDA only
*/
/*
* 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/slab.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/dmi.h>
#ifdef CONFIG_PPC_CHRP
#include <asm/processor.h>
#endif
#define DRV_NAME "via82cxxx"
#define VIA_IDE_ENABLE 0x40
#define VIA_IDE_CONFIG 0x41
#define VIA_FIFO_CONFIG 0x43
#define VIA_MISC_1 0x44
#define VIA_MISC_2 0x45
#define VIA_MISC_3 0x46
#define VIA_DRIVE_TIMING 0x48
#define VIA_8BIT_TIMING 0x4e
#define VIA_ADDRESS_SETUP 0x4c
#define VIA_UDMA_TIMING 0x50
#define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */
#define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */
#define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */
#define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */
#define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */
#define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */
#define VIA_SATA_PATA 0x80 /* SATA/PATA combined configuration */
enum {
VIA_IDFLAG_SINGLE = (1 << 1), /* single channel controller */
};
/*
* VIA SouthBridge chips.
*/
static struct via_isa_bridge {
char *name;
u16 id;
u8 rev_min;
u8 rev_max;
u8 udma_mask;
u8 flags;
} via_isa_bridges[] = {
{ "vx855", PCI_DEVICE_ID_VIA_VX855, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
{ "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
{ "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST | VIA_SATA_PATA },
{ "vt8261", PCI_DEVICE_ID_VIA_8261, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt6415", PCI_DEVICE_ID_VIA_6410, 0x00, 0xff, ATA_UDMA6, VIA_BAD_AST },
{ "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
{ "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
{ "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
{ "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
{ "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
{ "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
{ "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
{ "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
{ "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
{ "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
{ "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
{ "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
{ "vtxxxx", PCI_DEVICE_ID_VIA_ANON, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
{ NULL }
};
static unsigned int via_clock;
static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
struct via82cxxx_dev
{
struct via_isa_bridge *via_config;
unsigned int via_80w;
};
/**
* via_set_speed - write timing registers
* @dev: PCI device
* @dn: device
* @timing: IDE timing data to use
*
* via_set_speed writes timing values to the chipset registers
*/
static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
struct ide_host *host = pci_get_drvdata(dev);
struct via82cxxx_dev *vdev = host->host_priv;
u8 t;
if (~vdev->via_config->flags & VIA_BAD_AST) {
pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
}
pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));
pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));
switch (vdev->via_config->udma_mask) {
case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
}
/* Set UDMA unless device is not UDMA capable */
if (vdev->via_config->udma_mask) {
u8 udma_etc;
pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);
/* clear transfer mode bit */
udma_etc &= ~0x20;
if (timing->udma) {
/* preserve 80-wire cable detection bit */
udma_etc &= 0x10;
udma_etc |= t;
}
pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);
}
}
/**
* via_set_drive - configure transfer mode
* @hwif: port
* @drive: Drive to set up
*
* via_set_drive() computes timing values configures the chipset to
* a desired transfer mode. It also can be called by upper layers.
*/
static void via_set_drive(ide_hwif_t *hwif, ide_drive_t *drive)
{
ide_drive_t *peer = ide_get_pair_dev(drive);
struct pci_dev *dev = to_pci_dev(hwif->dev);
struct ide_host *host = pci_get_drvdata(dev);
struct via82cxxx_dev *vdev = host->host_priv;
struct ide_timing t, p;
unsigned int T, UT;
const u8 speed = drive->dma_mode;
T = 1000000000 / via_clock;
switch (vdev->via_config->udma_mask) {
case ATA_UDMA2: UT = T; break;
case ATA_UDMA4: UT = T/2; break;
case ATA_UDMA5: UT = T/3; break;
case ATA_UDMA6: UT = T/4; break;
default: UT = T;
}
ide_timing_compute(drive, speed, &t, T, UT);
if (peer) {
ide_timing_compute(peer, peer->pio_mode, &p, T, UT);
ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
}
via_set_speed(hwif, drive->dn, &t);
}
/**
* via_set_pio_mode - set host controller for PIO mode
* @hwif: port
* @drive: drive
*
* A callback from the upper layers for PIO-only tuning.
*/
static void via_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
drive->dma_mode = drive->pio_mode;
via_set_drive(hwif, drive);
}
static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
{
struct via_isa_bridge *via_config;
for (via_config = via_isa_bridges;
via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)
if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
!!(via_config->flags & VIA_BAD_ID),
via_config->id, NULL))) {
if ((*isa)->revision >= via_config->rev_min &&
(*isa)->revision <= via_config->rev_max)
break;
pci_dev_put(*isa);
}
return via_config;
}
/*
* Check and handle 80-wire cable presence
*/
static void via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
{
int i;
switch (vdev->via_config->udma_mask) {
case ATA_UDMA4:
for (i = 24; i >= 0; i -= 8)
if (((u >> (i & 16)) & 8) &&
((u >> i) & 0x20) &&
(((u >> i) & 7) < 2)) {
/*
* 2x PCI clock and
* UDMA w/ < 3T/cycle
*/
vdev->via_80w |= (1 << (1 - (i >> 4)));
}
break;
case ATA_UDMA5:
for (i = 24; i >= 0; i -= 8)
if (((u >> i) & 0x10) ||
(((u >> i) & 0x20) &&
(((u >> i) & 7) < 4))) {
/* BIOS 80-wire bit or
* UDMA w/ < 60ns/cycle
*/
vdev->via_80w |= (1 << (1 - (i >> 4)));
}
break;
case ATA_UDMA6:
for (i = 24; i >= 0; i -= 8)
if (((u >> i) & 0x10) ||
(((u >> i) & 0x20) &&
(((u >> i) & 7) < 6))) {
/* BIOS 80-wire bit or
* UDMA w/ < 60ns/cycle
*/
vdev->via_80w |= (1 << (1 - (i >> 4)));
}
break;
}
}
/**
* init_chipset_via82cxxx - initialization handler
* @dev: PCI device
*
* The initialization callback. Here we determine the IDE chip type
* and initialize its drive independent registers.
*/
static int init_chipset_via82cxxx(struct pci_dev *dev)
{
struct ide_host *host = pci_get_drvdata(dev);
struct via82cxxx_dev *vdev = host->host_priv;
struct via_isa_bridge *via_config = vdev->via_config;
u8 t, v;
u32 u;
/*
* Detect cable and configure Clk66
*/
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
via_cable_detect(vdev, u);
if (via_config->udma_mask == ATA_UDMA4) {
/* Enable Clk66 */
pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
} else if (via_config->flags & VIA_BAD_CLK66) {
/* Would cause trouble on 596a and 686 */
pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
}
/*
* Check whether interfaces are enabled.
*/
pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
/*
* Set up FIFO sizes and thresholds.
*/
pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
/* Disable PREQ# till DDACK# */
if (via_config->flags & VIA_BAD_PREQ) {
/* Would crash on 586b rev 41 */
t &= 0x7f;
}
/* Fix FIFO split between channels */
if (via_config->flags & VIA_SET_FIFO) {
t &= (t & 0x9f);
switch (v & 3) {
case 2: t |= 0x00; break; /* 16 on primary */
case 1: t |= 0x60; break; /* 16 on secondary */
case 3: t |= 0x20; break; /* 8 pri 8 sec */
}
}
pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
return 0;
}
/*
* Cable special cases
*/
static const struct dmi_system_id cable_dmi_table[] = {
{
.ident = "Acer Ferrari 3400",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
},
},
{ }
};
static int via_cable_override(struct pci_dev *pdev)
{
/* Systems by DMI */
if (dmi_check_system(cable_dmi_table))
return 1;
/* Arima W730-K8/Targa Visionary 811/... */
if (pdev->subsystem_vendor == 0x161F &&
pdev->subsystem_device == 0x2032)
return 1;
return 0;
}
static u8 via82cxxx_cable_detect(ide_hwif_t *hwif)
{
struct pci_dev *pdev = to_pci_dev(hwif->dev);
struct ide_host *host = pci_get_drvdata(pdev);
struct via82cxxx_dev *vdev = host->host_priv;
if (via_cable_override(pdev))
return ATA_CBL_PATA40_SHORT;
if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)
return ATA_CBL_SATA;
if ((vdev->via_80w >> hwif->channel) & 1)
return ATA_CBL_PATA80;
else
return ATA_CBL_PATA40;
}
static const struct ide_port_ops via_port_ops = {
.set_pio_mode = via_set_pio_mode,
.set_dma_mode = via_set_drive,
.cable_detect = via82cxxx_cable_detect,
};
static const struct ide_port_info via82cxxx_chipset __devinitdata = {
.name = DRV_NAME,
.init_chipset = init_chipset_via82cxxx,
.enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
.port_ops = &via_port_ops,
.host_flags = IDE_HFLAG_PIO_NO_BLACKLIST |
IDE_HFLAG_POST_SET_MODE |
IDE_HFLAG_IO_32BIT,
.pio_mask = ATA_PIO5,
.swdma_mask = ATA_SWDMA2,
.mwdma_mask = ATA_MWDMA2,
};
static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
struct pci_dev *isa = NULL;
struct via_isa_bridge *via_config;
struct via82cxxx_dev *vdev;
int rc;
u8 idx = id->driver_data;
struct ide_port_info d;
d = via82cxxx_chipset;
/*
* Find the ISA bridge and check we know what it is.
*/
via_config = via_config_find(&isa);
/*
* Print the boot message.
*/
printk(KERN_INFO DRV_NAME " %s: VIA %s (rev %02x) IDE %sDMA%s\n",
pci_name(dev), via_config->name, isa->revision,
via_config->udma_mask ? "U" : "MW",
via_dma[via_config->udma_mask ?
(fls(via_config->udma_mask) - 1) : 0]);
pci_dev_put(isa);
/*
* Determine system bus clock.
*/
via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
switch (via_clock) {
case 33000: via_clock = 33333; break;
case 37000: via_clock = 37500; break;
case 41000: via_clock = 41666; break;
}
if (via_clock < 20000 || via_clock > 50000) {
printk(KERN_WARNING DRV_NAME ": User given PCI clock speed "
"impossible (%d), using 33 MHz instead.\n", via_clock);
via_clock = 33333;
}
if (idx == 1)
d.enablebits[1].reg = d.enablebits[0].reg = 0;
else
d.host_flags |= IDE_HFLAG_NO_AUTODMA;
if (idx == VIA_IDFLAG_SINGLE)
d.host_flags |= IDE_HFLAG_SINGLE;
if ((via_config->flags & VIA_NO_UNMASK) == 0)
d.host_flags |= IDE_HFLAG_UNMASK_IRQS;
d.udma_mask = via_config->udma_mask;
vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
if (!vdev) {
printk(KERN_ERR DRV_NAME " %s: out of memory :(\n",
pci_name(dev));
return -ENOMEM;
}
vdev->via_config = via_config;
rc = ide_pci_init_one(dev, &d, vdev);
if (rc)
kfree(vdev);
return rc;
}
static void __devexit via_remove(struct pci_dev *dev)
{
struct ide_host *host = pci_get_drvdata(dev);
struct via82cxxx_dev *vdev = host->host_priv;
ide_pci_remove(dev);
kfree(vdev);
}
static const struct pci_device_id via_pci_tbl[] = {
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_VX855_IDE), VIA_IDFLAG_SINGLE },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6415), 1 },
{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, via_pci_tbl);
static struct pci_driver via_pci_driver = {
.name = "VIA_IDE",
.id_table = via_pci_tbl,
.probe = via_init_one,
.remove = __devexit_p(via_remove),
.suspend = ide_pci_suspend,
.resume = ide_pci_resume,
};
static int __init via_ide_init(void)
{
return ide_pci_register_driver(&via_pci_driver);
}
static void __exit via_ide_exit(void)
{
pci_unregister_driver(&via_pci_driver);
}
module_init(via_ide_init);
module_exit(via_ide_exit);
MODULE_AUTHOR("Vojtech Pavlik, Bartlomiej Zolnierkiewicz, Michel Aubry, Jeff Garzik, Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for VIA IDE");
MODULE_LICENSE("GPL");
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