/*
* linux/drivers/ide/pci/piix.c Version 0.44 March 20, 2003
*
* 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>
*
* May be copied or modified under the terms of the GNU General Public License
*
* PIO mode setting function for Intel chipsets.
* For use instead of BIOS settings.
*
* 40-41
* 42-43
*
* 41
* 43
*
* | PIO 0 | c0 | 80 | 0 | piix_tune_drive(drive, 0);
* | PIO 2 | SW2 | d0 | 90 | 4 | piix_tune_drive(drive, 2);
* | PIO 3 | MW1 | e1 | a1 | 9 | piix_tune_drive(drive, 3);
* | PIO 4 | MW2 | e3 | a3 | b | piix_tune_drive(drive, 4);
*
* sitre = word40 & 0x4000; primary
* sitre = word42 & 0x4000; secondary
*
* 44 8421|8421 hdd|hdb
*
* 48 8421 hdd|hdc|hdb|hda udma enabled
*
* 0001 hda
* 0010 hdb
* 0100 hdc
* 1000 hdd
*
* 4a 84|21 hdb|hda
* 4b 84|21 hdd|hdc
*
* ata-33/82371AB
* ata-33/82371EB
* ata-33/82801AB ata-66/82801AA
* 00|00 udma 0 00|00 reserved
* 01|01 udma 1 01|01 udma 3
* 10|10 udma 2 10|10 udma 4
* 11|11 reserved 11|11 reserved
*
* 54 8421|8421 ata66 drive|ata66 enable
*
* pci_read_config_word(HWIF(drive)->pci_dev, 0x40, ®40);
* pci_read_config_word(HWIF(drive)->pci_dev, 0x42, ®42);
* pci_read_config_word(HWIF(drive)->pci_dev, 0x44, ®44);
* pci_read_config_word(HWIF(drive)->pci_dev, 0x48, ®48);
* pci_read_config_word(HWIF(drive)->pci_dev, 0x4a, ®4a);
* pci_read_config_word(HWIF(drive)->pci_dev, 0x54, ®54);
*
* 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.
*
* 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/config.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/pci.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <asm/io.h>
#include "piix.h"
static int no_piix_dma;
#if defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS)
#include <linux/stat.h>
#include <linux/proc_fs.h>
static u8 piix_proc = 0;
#define PIIX_MAX_DEVS 5
static struct pci_dev *piix_devs[PIIX_MAX_DEVS];
static int n_piix_devs;
/**
* piix_get_info - fill in /proc for PIIX ide
* @buffer: buffer to fill
* @addr: address of user start in buffer
* @offset: offset into 'file'
* @count: buffer count
*
* Walks the PIIX devices and outputs summary data on the tuning and
* anything else that will help with debugging
*/
static int piix_get_info (char *buffer, char **addr, off_t offset, int count)
{
char *p = buffer;
int i;
for (i = 0; i < n_piix_devs; i++) {
struct pci_dev *dev = piix_devs[i];
unsigned long bibma = pci_resource_start(dev, 4);
u16 reg40 = 0, psitre = 0, reg42 = 0, ssitre = 0;
u8 c0 = 0, c1 = 0, reg54 = 0, reg55 = 0;
u8 reg44 = 0, reg48 = 0, reg4a = 0, reg4b = 0;
p += sprintf(p, "\nController: %d\n", i);
p += sprintf(p, "\n Intel ");
switch(dev->device) {
case PCI_DEVICE_ID_INTEL_82801EB_1:
p += sprintf(p, "PIIX4 SATA 150 ");
break;
case PCI_DEVICE_ID_INTEL_82801BA_8:
case PCI_DEVICE_ID_INTEL_82801BA_9:
case PCI_DEVICE_ID_INTEL_82801CA_10:
case PCI_DEVICE_ID_INTEL_82801CA_11:
case PCI_DEVICE_ID_INTEL_82801DB_10:
case PCI_DEVICE_ID_INTEL_82801DB_11:
case PCI_DEVICE_ID_INTEL_82801EB_11:
case PCI_DEVICE_ID_INTEL_82801E_11:
case PCI_DEVICE_ID_INTEL_ESB_2:
case PCI_DEVICE_ID_INTEL_ICH6_2:
p += sprintf(p, "PIIX4 Ultra 100 ");
break;
case PCI_DEVICE_ID_INTEL_82372FB_1:
case PCI_DEVICE_ID_INTEL_82801AA_1:
p += sprintf(p, "PIIX4 Ultra 66 ");
break;
case PCI_DEVICE_ID_INTEL_82451NX:
case PCI_DEVICE_ID_INTEL_82801AB_1:
case PCI_DEVICE_ID_INTEL_82443MX_1:
case PCI_DEVICE_ID_INTEL_82371AB:
p += sprintf(p, "PIIX4 Ultra 33 ");
break;
case PCI_DEVICE_ID_INTEL_82371SB_1:
p += sprintf(p, "PIIX3 ");
break;
case PCI_DEVICE_ID_INTEL_82371MX:
p += sprintf(p, "MPIIX ");
break;
case PCI_DEVICE_ID_INTEL_82371FB_1:
case PCI_DEVICE_ID_INTEL_82371FB_0:
default:
p += sprintf(p, "PIIX ");
break;
}
p += sprintf(p, "Chipset.\n");
if (dev->device == PCI_DEVICE_ID_INTEL_82371MX)
continue;
pci_read_config_word(dev, 0x40, ®40);
pci_read_config_word(dev, 0x42, ®42);
pci_read_config_byte(dev, 0x44, ®44);
pci_read_config_byte(dev, 0x48, ®48);
pci_read_config_byte(dev, 0x4a, ®4a);
pci_read_config_byte(dev, 0x4b, ®4b);
pci_read_config_byte(dev, 0x54, ®54);
pci_read_config_byte(dev, 0x55, ®55);
psitre = (reg40 & 0x4000) ? 1 : 0;
ssitre = (reg42 & 0x4000) ? 1 : 0;
/*
* at that point bibma+0x2 et bibma+0xa are byte registers
* to investigate:
*/
c0 = inb(bibma + 0x02);
c1 = inb(bibma + 0x0a);
p += sprintf(p, "--------------- Primary Channel "
"---------------- Secondary Channel "
"-------------\n");
p += sprintf(p, " %sabled "
" %sabled\n",
(c0&0x80) ? "dis" : " en",
(c1&0x80) ? "dis" : " en");
p += sprintf(p, "--------------- drive0 --------- drive1 "
"-------- drive0 ---------- drive1 ------\n");
p += sprintf(p, "DMA enabled: %s %s "
" %s %s\n",
(c0&0x20) ? "yes" : "no ",
(c0&0x40) ? "yes" : "no ",
(c1&0x20) ? "yes" : "no ",
(c1&0x40) ? "yes" : "no " );
p += sprintf(p, "UDMA enabled: %s %s "
" %s %s\n",
(reg48&0x01) ? "yes" : "no ",
(reg48&0x02) ? "yes" : "no ",
(reg48&0x04) ? "yes" : "no ",
(reg48&0x08) ? "yes" : "no " );
p += sprintf(p, "UDMA enabled: %s %s "
" %s %s\n",
((reg54&0x11) &&
(reg55&0x10) && (reg4a&0x01)) ? "5" :
((reg54&0x11) && (reg4a&0x02)) ? "4" :
((reg54&0x11) && (reg4a&0x01)) ? "3" :
(reg4a&0x02) ? "2" :
(reg4a&0x01) ? "1" :
(reg4a&0x00) ? "0" : "X",
((reg54&0x22) &&
(reg55&0x20) && (reg4a&0x10)) ? "5" :
((reg54&0x22) && (reg4a&0x20)) ? "4" :
((reg54&0x22) && (reg4a&0x10)) ? "3" :
(reg4a&0x20) ? "2" :
(reg4a&0x10) ? "1" :
(reg4a&0x00) ? "0" : "X",
((reg54&0x44) &&
(reg55&0x40) && (reg4b&0x03)) ? "5" :
((reg54&0x44) && (reg4b&0x02)) ? "4" :
((reg54&0x44) && (reg4b&0x01)) ? "3" :
(reg4b&0x02) ? "2" :
(reg4b&0x01) ? "1" :
(reg4b&0x00) ? "0" : "X",
((reg54&0x88) &&
(reg55&0x80) && (reg4b&0x30)) ? "5" :
((reg54&0x88) && (reg4b&0x20)) ? "4" :
((reg54&0x88) && (reg4b&0x10)) ? "3" :
(reg4b&0x20) ? "2" :
(reg4b&0x10) ? "1" :
(reg4b&0x00) ? "0" : "X");
p += sprintf(p, "UDMA\n");
p += sprintf(p, "DMA\n");
p += sprintf(p, "PIO\n");
/*
* FIXME.... Add configuration junk data....blah blah......
*/
}
return p-buffer; /* => must be less than 4k! */
}
#endif /* defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS) */
/**
* piix_ratemask - compute rate mask for PIIX IDE
* @drive: IDE drive to compute for
*
* Returns the available modes for the PIIX IDE controller.
*/
static u8 piix_ratemask (ide_drive_t *drive)
{
struct pci_dev *dev = HWIF(drive)->pci_dev;
u8 mode;
switch(dev->device) {
case PCI_DEVICE_ID_INTEL_82801EB_1:
mode = 3;
break;
/* UDMA 100 capable */
case PCI_DEVICE_ID_INTEL_82801BA_8:
case PCI_DEVICE_ID_INTEL_82801BA_9:
case PCI_DEVICE_ID_INTEL_82801CA_10:
case PCI_DEVICE_ID_INTEL_82801CA_11:
case PCI_DEVICE_ID_INTEL_82801E_11:
case PCI_DEVICE_ID_INTEL_82801DB_10:
case PCI_DEVICE_ID_INTEL_82801DB_11:
case PCI_DEVICE_ID_INTEL_82801EB_11:
case PCI_DEVICE_ID_INTEL_ESB_2:
case PCI_DEVICE_ID_INTEL_ICH6_2:
mode = 3;
break;
/* UDMA 66 capable */
case PCI_DEVICE_ID_INTEL_82801AA_1:
case PCI_DEVICE_ID_INTEL_82372FB_1:
mode = 2;
break;
/* UDMA 33 capable */
case PCI_DEVICE_ID_INTEL_82371AB:
case PCI_DEVICE_ID_INTEL_82443MX_1:
case PCI_DEVICE_ID_INTEL_82451NX:
case PCI_DEVICE_ID_INTEL_82801AB_1:
return 1;
/* Non UDMA capable (MWDMA2) */
case PCI_DEVICE_ID_INTEL_82371SB_1:
case PCI_DEVICE_ID_INTEL_82371FB_1:
case PCI_DEVICE_ID_INTEL_82371FB_0:
case PCI_DEVICE_ID_INTEL_82371MX:
default:
return 0;
}
/*
* If we are UDMA66 capable fall back to UDMA33
* if the drive cannot see an 80pin cable.
*/
if (!eighty_ninty_three(drive))
mode = min(mode, (u8)1);
return mode;
}
/**
* piix_dma_2_pio - return the PIO mode matching DMA
* @xfer_rate: transfer speed
*
* Returns the nearest equivalent PIO timing for the PIO or DMA
* mode requested by the controller.
*/
static u8 piix_dma_2_pio (u8 xfer_rate) {
switch(xfer_rate) {
case XFER_UDMA_6:
case XFER_UDMA_5:
case XFER_UDMA_4:
case XFER_UDMA_3:
case XFER_UDMA_2:
case XFER_UDMA_1:
case XFER_UDMA_0:
case XFER_MW_DMA_2:
case XFER_PIO_4:
return 4;
case XFER_MW_DMA_1:
case XFER_PIO_3:
return 3;
case XFER_SW_DMA_2:
case XFER_PIO_2:
return 2;
case XFER_MW_DMA_0:
case XFER_SW_DMA_1:
case XFER_SW_DMA_0:
case XFER_PIO_1:
case XFER_PIO_0:
case XFER_PIO_SLOW:
default:
return 0;
}
}
/**
* piix_tune_drive - tune a drive attached to a PIIX
* @drive: drive to tune
* @pio: desired PIO mode
*
* Set the interface PIO mode based upon the settings done by AMI BIOS
* (might be useful if drive is not registered in CMOS for any reason).
*/
static void piix_tune_drive (ide_drive_t *drive, u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
int is_slave = (&hwif->drives[1] == drive);
int master_port = hwif->channel ? 0x42 : 0x40;
int slave_port = 0x44;
unsigned long flags;
u16 master_data;
u8 slave_data;
/* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
spin_lock_irqsave(&ide_lock, flags);
pci_read_config_word(dev, master_port, &master_data);
if (is_slave) {
master_data = master_data | 0x4000;
if (pio > 1)
/* enable PPE, IE and TIME */
master_data = master_data | 0x0070;
pci_read_config_byte(dev, slave_port, &slave_data);
slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));
} else {
master_data = master_data & 0xccf8;
if (pio > 1)
/* enable PPE, IE and TIME */
master_data = master_data | 0x0007;
master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
}
pci_write_config_word(dev, master_port, master_data);
if (is_slave)
pci_write_config_byte(dev, slave_port, slave_data);
spin_unlock_irqrestore(&ide_lock, flags);
}
/**
* piix_tune_chipset - tune a PIIX interface
* @drive: IDE drive to tune
* @xferspeed: speed to configure
*
* Set a PIIX interface channel to the desired speeds. This involves
* requires the right timing data into the PIIX configuration space
* then setting the drive parameters appropriately
*/
static int piix_tune_chipset (ide_drive_t *drive, u8 xferspeed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 maslave = hwif->channel ? 0x42 : 0x40;
u8 speed = ide_rate_filter(piix_ratemask(drive), xferspeed);
int a_speed = 3 << (drive->dn * 4);
int u_flag = 1 << drive->dn;
int v_flag = 0x01 << drive->dn;
int w_flag = 0x10 << drive->dn;
int u_speed = 0;
int sitre;
u16 reg4042, reg44, reg48, reg4a, reg54;
u8 reg55;
pci_read_config_word(dev, maslave, ®4042);
sitre = (reg4042 & 0x4000) ? 1 : 0;
pci_read_config_word(dev, 0x44, ®44);
pci_read_config_word(dev, 0x48, ®48);
pci_read_config_word(dev, 0x4a, ®4a);
pci_read_config_word(dev, 0x54, ®54);
pci_read_config_byte(dev, 0x55, ®55);
switch(speed) {
case XFER_UDMA_4:
case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
case XFER_UDMA_5:
case XFER_UDMA_3:
case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
case XFER_MW_DMA_2:
case XFER_MW_DMA_1:
case XFER_SW_DMA_2: break;
case XFER_PIO_4:
case XFER_PIO_3:
case XFER_PIO_2:
case XFER_PIO_0: break;
default: return -1;
}
if (speed >= XFER_UDMA_0) {
if (!(reg48 & u_flag))
pci_write_config_word(dev, 0x48, reg48|u_flag);
if (speed == XFER_UDMA_5) {
pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag);
} else {
pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
}
if (!(reg4a & u_speed)) {
pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
pci_write_config_word(dev, 0x4a, reg4a|u_speed);
}
if (speed > XFER_UDMA_2) {
if (!(reg54 & v_flag)) {
pci_write_config_word(dev, 0x54, reg54|v_flag);
}
} else {
pci_write_config_word(dev, 0x54, reg54 & ~v_flag);
}
} else {
if (reg48 & u_flag)
pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
if (reg4a & a_speed)
pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
if (reg54 & v_flag)
pci_write_config_word(dev, 0x54, reg54 & ~v_flag);
if (reg55 & w_flag)
pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
}
piix_tune_drive(drive, piix_dma_2_pio(speed));
return (ide_config_drive_speed(drive, speed));
}
/**
* piix_faulty_dma0 - check for DMA0 errata
* @hwif: IDE interface to check
*
* If an ICH/ICH0/ICH2 interface is is operating in multi-word
* DMA mode with 600nS cycle time the IDE PIO prefetch buffer will
* inadvertently provide an extra piece of secondary data to the primary
* device resulting in data corruption.
*
* With such a device this test function returns true. This allows
* our tuning code to follow Intel recommendations and use PIO on
* such devices.
*/
static int piix_faulty_dma0(ide_hwif_t *hwif)
{
switch(hwif->pci_dev->device)
{
case PCI_DEVICE_ID_INTEL_82801AA_1: /* ICH */
case PCI_DEVICE_ID_INTEL_82801AB_1: /* ICH0 */
case PCI_DEVICE_ID_INTEL_82801BA_8: /* ICH2 */
case PCI_DEVICE_ID_INTEL_82801BA_9: /* ICH2 */
return 1;
}
return 0;
}
/**
* piix_config_drive_for_dma - configure drive for DMA
* @drive: IDE drive to configure
*
* Set up a PIIX interface channel for the best available speed.
* We prefer UDMA if it is available and then MWDMA. If DMA is
* not available we switch to PIO and return 0.
*/
static int piix_config_drive_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, piix_ratemask(drive));
/* Some ICH devices cannot support DMA mode 0 */
if(speed == XFER_MW_DMA_0 && piix_faulty_dma0(HWIF(drive)))
speed = 0;
/* If no DMA speed was available or the chipset has DMA bugs
then disable DMA and use PIO */
if (!speed || no_piix_dma) {
u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL);
speed = piix_dma_2_pio(XFER_PIO_0 + tspeed);
}
(void) piix_tune_chipset(drive, speed);
return ide_dma_enable(drive);
}
/**
* piix_config_drive_xfer_rate - set up an IDE device
* @drive: IDE drive to configure
*
* Set up the PIIX interface for the best available speed on this
* interface, preferring DMA to PIO.
*/
static int piix_config_drive_xfer_rate (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct hd_driveid *id = drive->id;
drive->init_speed = 0;
if ((id->capability & 1) && drive->autodma) {
/* Consult the list of known "bad" drives */
if (__ide_dma_bad_drive(drive))
goto fast_ata_pio;
if (id->field_valid & 4) {
if (id->dma_ultra & hwif->ultra_mask) {
/* Force if Capable UltraDMA */
if ((id->field_valid & 2) &&
(!piix_config_drive_for_dma(drive)))
goto try_dma_modes;
}
} else if (id->field_valid & 2) {
try_dma_modes:
if ((id->dma_mword & hwif->mwdma_mask) ||
(id->dma_1word & hwif->swdma_mask)) {
/* Force if Capable regular DMA modes */
if (!piix_config_drive_for_dma(drive))
goto no_dma_set;
}
} else if (__ide_dma_good_drive(drive) &&
(id->eide_dma_time < 150)) {
/* Consult the list of known "good" drives */
if (!piix_config_drive_for_dma(drive))
goto no_dma_set;
} else {
goto fast_ata_pio;
}
return hwif->ide_dma_on(drive);
} else if ((id->capability & 8) || (id->field_valid & 2)) {
fast_ata_pio:
no_dma_set:
hwif->tuneproc(drive, 255);
return hwif->ide_dma_off_quietly(drive);
}
/* IORDY not supported */
return 0;
}
/**
* init_chipset_piix - set up the PIIX chipset
* @dev: PCI device to set up
* @name: Name of the device
*
* Initialize the PCI device as required. For the PIIX this turns
* out to be nice and simple
*/
static unsigned int __devinit init_chipset_piix (struct pci_dev *dev, const char *name)
{
switch(dev->device) {
case PCI_DEVICE_ID_INTEL_82801EB_1:
case PCI_DEVICE_ID_INTEL_82801AA_1:
case PCI_DEVICE_ID_INTEL_82801AB_1:
case PCI_DEVICE_ID_INTEL_82801BA_8:
case PCI_DEVICE_ID_INTEL_82801BA_9:
case PCI_DEVICE_ID_INTEL_82801CA_10:
case PCI_DEVICE_ID_INTEL_82801CA_11:
case PCI_DEVICE_ID_INTEL_82801DB_10:
case PCI_DEVICE_ID_INTEL_82801DB_11:
case PCI_DEVICE_ID_INTEL_82801EB_11:
case PCI_DEVICE_ID_INTEL_82801E_11:
case PCI_DEVICE_ID_INTEL_ESB_2:
case PCI_DEVICE_ID_INTEL_ICH6_2:
{
unsigned int extra = 0;
pci_read_config_dword(dev, 0x54, &extra);
pci_write_config_dword(dev, 0x54, extra|0x400);
}
default:
break;
}
#if defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS)
piix_devs[n_piix_devs++] = dev;
if (!piix_proc) {
piix_proc = 1;
ide_pci_create_host_proc("piix", piix_get_info);
}
#endif /* DISPLAY_PIIX_TIMINGS && CONFIG_PROC_FS */
return 0;
}
/**
* init_hwif_piix - fill in the hwif for the PIIX
* @hwif: IDE interface
*
* Set up the ide_hwif_t for the PIIX interface according to the
* capabilities of the hardware.
*/
static void __init init_hwif_piix (ide_hwif_t *hwif)
{
u8 reg54h = 0, reg55h = 0, ata66 = 0;
u8 mask = hwif->channel ? 0xc0 : 0x30;
#ifndef CONFIG_IA64
if (!hwif->irq)
hwif->irq = hwif->channel ? 15 : 14;
#endif /* CONFIG_IA64 */
if (hwif->pci_dev->device == PCI_DEVICE_ID_INTEL_82371MX) {
/* This is a painful system best to let it self tune for now */
return;
}
hwif->autodma = 0;
hwif->tuneproc = &piix_tune_drive;
hwif->speedproc = &piix_tune_chipset;
hwif->drives[0].autotune = 1;
hwif->drives[1].autotune = 1;
if (!hwif->dma_base)
return;
hwif->atapi_dma = 1;
hwif->ultra_mask = 0x3f;
hwif->mwdma_mask = 0x06;
hwif->swdma_mask = 0x04;
switch(hwif->pci_dev->device) {
case PCI_DEVICE_ID_INTEL_82371MX:
hwif->mwdma_mask = 0x80;
hwif->swdma_mask = 0x80;
case PCI_DEVICE_ID_INTEL_82371FB_0:
case PCI_DEVICE_ID_INTEL_82371FB_1:
case PCI_DEVICE_ID_INTEL_82371SB_1:
hwif->ultra_mask = 0x80;
break;
case PCI_DEVICE_ID_INTEL_82371AB:
case PCI_DEVICE_ID_INTEL_82443MX_1:
case PCI_DEVICE_ID_INTEL_82451NX:
case PCI_DEVICE_ID_INTEL_82801AB_1:
hwif->ultra_mask = 0x07;
break;
default:
pci_read_config_byte(hwif->pci_dev, 0x54, ®54h);
pci_read_config_byte(hwif->pci_dev, 0x55, ®55h);
ata66 = (reg54h & mask) ? 1 : 0;
break;
}
if (!(hwif->udma_four))
hwif->udma_four = ata66;
hwif->ide_dma_check = &piix_config_drive_xfer_rate;
if (!noautodma)
hwif->autodma = 1;
hwif->drives[1].autodma = hwif->autodma;
hwif->drives[0].autodma = hwif->autodma;
}
/**
* init_setup_piix - callback for IDE initialize
* @dev: PIIX PCI device
* @d: IDE pci info
*
* Enable the xp fixup for the PIIX controller and then perform
* a standard ide PCI setup
*/
static void __init init_setup_piix (struct pci_dev *dev, ide_pci_device_t *d)
{
ide_setup_pci_device(dev, d);
}
/**
* piix_init_one - called when a PIIX is found
* @dev: the piix device
* @id: the matching pci id
*
* Called when the PCI registration layer (or the IDE initialization)
* finds a device matching our IDE device tables.
*/
static int __devinit piix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
ide_pci_device_t *d = &piix_pci_info[id->driver_data];
if (dev->device != d->device)
BUG();
d->init_setup(dev, d);
return 0;
}
/**
* piix_check_450nx - Check for problem 450NX setup
*
* Check for the present of 450NX errata #19 and errata #25. If
* they are found, disable use of DMA IDE
*/
static void __init piix_check_450nx(void)
{
struct pci_dev *pdev = NULL;
u16 cfg;
u8 rev;
while((pdev=pci_find_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_byte(pdev, PCI_REVISION_ID, &rev);
pci_read_config_word(pdev, 0x41, &cfg);
/* Only on the original revision: IDE DMA can hang */
if(rev == 0x00)
no_piix_dma = 1;
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
else if(cfg & (1<<14) && rev < 5)
no_piix_dma = 2;
}
if(no_piix_dma)
printk(KERN_WARNING "piix: 450NX errata present, disabling IDE DMA.\n");
if(no_piix_dma == 2)
printk(KERN_WARNING "piix: A BIOS update may resolve this.\n");
}
static struct pci_device_id piix_pci_tbl[] = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371FB_0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371FB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371MX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82443MX_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82372FB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_9, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_8, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_10,PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_11,PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_11,PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_11,PCI_ANY_ID, PCI_ANY_ID, 0, 0, 15},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801E_11, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 16},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_10,PCI_ANY_ID, PCI_ANY_ID, 0, 0, 17},
#ifndef CONFIG_SCSI_SATA
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 18},
#endif /* !CONFIG_SCSI_SATA */
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 19},
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 20},
{ 0, },
};
MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
static struct pci_driver driver = {
.name = "PIIX IDE",
.id_table = piix_pci_tbl,
.probe = piix_init_one,
};
static int __init piix_ide_init(void)
{
piix_check_450nx();
return ide_pci_register_driver(&driver);
}
module_init(piix_ide_init);
MODULE_AUTHOR("Andre Hedrick, Andrzej Krzysztofowicz");
MODULE_DESCRIPTION("PCI driver module for Intel PIIX IDE");
MODULE_LICENSE("GPL");
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