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linux-next/drivers/ide/pci/alim15x3.c
Bartlomiej Zolnierkiewicz 072cdcbb7a alim15x3: PIO fallback fix 
If DMA tuning fails always set the best PIO mode.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2007-05-05 22:03:50 +02:00

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/*
* linux/drivers/ide/pci/alim15x3.c Version 0.21 2007/02/03
*
* Copyright (C) 1998-2000 Michel Aubry, Maintainer
* Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer
* Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer
*
* Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org)
* May be copied or modified under the terms of the GNU General Public License
* Copyright (C) 2002 Alan Cox <alan@redhat.com>
* ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw>
* Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com>
*
* (U)DMA capable version of ali 1533/1543(C), 1535(D)
*
**********************************************************************
* 9/7/99 --Parts from the above author are included and need to be
* converted into standard interface, once I finish the thought.
*
* Recent changes
* Don't use LBA48 mode on ALi <= 0xC4
* Don't poke 0x79 with a non ALi northbridge
* Don't flip undefined bits on newer chipsets (fix Fujitsu laptop hang)
* Allow UDMA6 on revisions > 0xC4
*
* Documentation
* Chipset documentation available under NDA only
*
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <asm/io.h>
#define DISPLAY_ALI_TIMINGS
/*
* ALi devices are not plug in. Otherwise these static values would
* need to go. They ought to go away anyway
*/
static u8 m5229_revision;
static u8 chip_is_1543c_e;
static struct pci_dev *isa_dev;
#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
#include <linux/stat.h>
#include <linux/proc_fs.h>
static u8 ali_proc = 0;
static struct pci_dev *bmide_dev;
static char *fifo[4] = {
"FIFO Off",
"FIFO On ",
"DMA mode",
"PIO mode" };
static char *udmaT[8] = {
"1.5T",
" 2T",
"2.5T",
" 3T",
"3.5T",
" 4T",
" 6T",
" 8T"
};
static char *channel_status[8] = {
"OK ",
"busy ",
"DRQ ",
"DRQ busy ",
"error ",
"error busy ",
"error DRQ ",
"error DRQ busy"
};
/**
* ali_get_info - generate proc file for ALi IDE
* @buffer: buffer to fill
* @addr: address of user start in buffer
* @offset: offset into 'file'
* @count: buffer count
*
* Walks the Ali devices and outputs summary data on the tuning and
* anything else that will help with debugging
*/
static int ali_get_info (char *buffer, char **addr, off_t offset, int count)
{
unsigned long bibma;
u8 reg53h, reg5xh, reg5yh, reg5xh1, reg5yh1, c0, c1, rev, tmp;
char *q, *p = buffer;
/* fetch rev. */
pci_read_config_byte(bmide_dev, 0x08, &rev);
if (rev >= 0xc1) /* M1543C or newer */
udmaT[7] = " ???";
else
fifo[3] = " ??? ";
/* first fetch bibma: */
bibma = pci_resource_start(bmide_dev, 4);
/*
* at that point bibma+0x2 et bibma+0xa are byte
* registers to investigate:
*/
c0 = inb(bibma + 0x02);
c1 = inb(bibma + 0x0a);
p += sprintf(p,
"\n Ali M15x3 Chipset.\n");
p += sprintf(p,
" ------------------\n");
pci_read_config_byte(bmide_dev, 0x78, &reg53h);
p += sprintf(p, "PCI Clock: %d.\n", reg53h);
pci_read_config_byte(bmide_dev, 0x53, &reg53h);
p += sprintf(p,
"CD_ROM FIFO:%s, CD_ROM DMA:%s\n",
(reg53h & 0x02) ? "Yes" : "No ",
(reg53h & 0x01) ? "Yes" : "No " );
pci_read_config_byte(bmide_dev, 0x74, &reg53h);
p += sprintf(p,
"FIFO Status: contains %d Words, runs%s%s\n\n",
(reg53h & 0x3f),
(reg53h & 0x40) ? " OVERWR" : "",
(reg53h & 0x80) ? " OVERRD." : "." );
p += sprintf(p,
"-------------------primary channel"
"-------------------secondary channel"
"---------\n\n");
pci_read_config_byte(bmide_dev, 0x09, &reg53h);
p += sprintf(p,
"channel status: %s"
" %s\n",
(reg53h & 0x20) ? "On " : "Off",
(reg53h & 0x10) ? "On " : "Off" );
p += sprintf(p,
"both channels togth: %s"
" %s\n",
(c0&0x80) ? "No " : "Yes",
(c1&0x80) ? "No " : "Yes" );
pci_read_config_byte(bmide_dev, 0x76, &reg53h);
p += sprintf(p,
"Channel state: %s %s\n",
channel_status[reg53h & 0x07],
channel_status[(reg53h & 0x70) >> 4] );
pci_read_config_byte(bmide_dev, 0x58, &reg5xh);
pci_read_config_byte(bmide_dev, 0x5c, &reg5yh);
p += sprintf(p,
"Add. Setup Timing: %dT"
" %dT\n",
(reg5xh & 0x07) ? (reg5xh & 0x07) : 8,
(reg5yh & 0x07) ? (reg5yh & 0x07) : 8 );
pci_read_config_byte(bmide_dev, 0x59, &reg5xh);
pci_read_config_byte(bmide_dev, 0x5d, &reg5yh);
p += sprintf(p,
"Command Act. Count: %dT"
" %dT\n"
"Command Rec. Count: %dT"
" %dT\n\n",
(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8,
(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16 );
p += sprintf(p,
"----------------drive0-----------drive1"
"------------drive0-----------drive1------\n\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 " );
pci_read_config_byte(bmide_dev, 0x54, &reg5xh);
pci_read_config_byte(bmide_dev, 0x55, &reg5yh);
q = "FIFO threshold: %2d Words %2d Words"
" %2d Words %2d Words\n";
if (rev < 0xc1) {
if ((rev == 0x20) &&
(pci_read_config_byte(bmide_dev, 0x4f, &tmp), (tmp &= 0x20))) {
p += sprintf(p, q, 8, 8, 8, 8);
} else {
p += sprintf(p, q,
(reg5xh & 0x03) + 12,
((reg5xh & 0x30)>>4) + 12,
(reg5yh & 0x03) + 12,
((reg5yh & 0x30)>>4) + 12 );
}
} else {
int t1 = (tmp = (reg5xh & 0x03)) ? (tmp << 3) : 4;
int t2 = (tmp = ((reg5xh & 0x30)>>4)) ? (tmp << 3) : 4;
int t3 = (tmp = (reg5yh & 0x03)) ? (tmp << 3) : 4;
int t4 = (tmp = ((reg5yh & 0x30)>>4)) ? (tmp << 3) : 4;
p += sprintf(p, q, t1, t2, t3, t4);
}
#if 0
p += sprintf(p,
"FIFO threshold: %2d Words %2d Words"
" %2d Words %2d Words\n",
(reg5xh & 0x03) + 12,
((reg5xh & 0x30)>>4) + 12,
(reg5yh & 0x03) + 12,
((reg5yh & 0x30)>>4) + 12 );
#endif
p += sprintf(p,
"FIFO mode: %s %s %s %s\n",
fifo[((reg5xh & 0x0c) >> 2)],
fifo[((reg5xh & 0xc0) >> 6)],
fifo[((reg5yh & 0x0c) >> 2)],
fifo[((reg5yh & 0xc0) >> 6)] );
pci_read_config_byte(bmide_dev, 0x5a, &reg5xh);
pci_read_config_byte(bmide_dev, 0x5b, &reg5xh1);
pci_read_config_byte(bmide_dev, 0x5e, &reg5yh);
pci_read_config_byte(bmide_dev, 0x5f, &reg5yh1);
p += sprintf(p,/*
"------------------drive0-----------drive1"
"------------drive0-----------drive1------\n")*/
"Dt RW act. Cnt %2dT %2dT"
" %2dT %2dT\n"
"Dt RW rec. Cnt %2dT %2dT"
" %2dT %2dT\n\n",
(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
(reg5xh1 & 0x70) ? ((reg5xh1 & 0x70) >> 4) : 8,
(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8,
(reg5yh1 & 0x70) ? ((reg5yh1 & 0x70) >> 4) : 8,
(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
(reg5xh1 & 0x0f) ? (reg5xh1 & 0x0f) : 16,
(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16,
(reg5yh1 & 0x0f) ? (reg5yh1 & 0x0f) : 16 );
p += sprintf(p,
"-----------------------------------UDMA Timings"
"--------------------------------\n\n");
pci_read_config_byte(bmide_dev, 0x56, &reg5xh);
pci_read_config_byte(bmide_dev, 0x57, &reg5yh);
p += sprintf(p,
"UDMA: %s %s"
" %s %s\n"
"UDMA timings: %s %s"
" %s %s\n\n",
(reg5xh & 0x08) ? "OK" : "No",
(reg5xh & 0x80) ? "OK" : "No",
(reg5yh & 0x08) ? "OK" : "No",
(reg5yh & 0x80) ? "OK" : "No",
udmaT[(reg5xh & 0x07)],
udmaT[(reg5xh & 0x70) >> 4],
udmaT[reg5yh & 0x07],
udmaT[(reg5yh & 0x70) >> 4] );
return p-buffer; /* => must be less than 4k! */
}
#endif /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
/**
* ali15x3_tune_pio - set up chipset for PIO mode
* @drive: drive to tune
* @pio: desired mode
*
* Select the best PIO mode for the drive in question.
* Then program the controller for this mode.
*
* Returns the PIO mode programmed.
*/
static u8 ali15x3_tune_pio (ide_drive_t *drive, u8 pio)
{
ide_pio_data_t d;
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
int s_time, a_time, c_time;
u8 s_clc, a_clc, r_clc;
unsigned long flags;
int bus_speed = system_bus_clock();
int port = hwif->channel ? 0x5c : 0x58;
int portFIFO = hwif->channel ? 0x55 : 0x54;
u8 cd_dma_fifo = 0;
int unit = drive->select.b.unit & 1;
pio = ide_get_best_pio_mode(drive, pio, 5, &d);
s_time = ide_pio_timings[pio].setup_time;
a_time = ide_pio_timings[pio].active_time;
if ((s_clc = (s_time * bus_speed + 999) / 1000) >= 8)
s_clc = 0;
if ((a_clc = (a_time * bus_speed + 999) / 1000) >= 8)
a_clc = 0;
c_time = ide_pio_timings[pio].cycle_time;
#if 0
if ((r_clc = ((c_time - s_time - a_time) * bus_speed + 999) / 1000) >= 16)
r_clc = 0;
#endif
if (!(r_clc = (c_time * bus_speed + 999) / 1000 - a_clc - s_clc)) {
r_clc = 1;
} else {
if (r_clc >= 16)
r_clc = 0;
}
local_irq_save(flags);
/*
* PIO mode => ATA FIFO on, ATAPI FIFO off
*/
pci_read_config_byte(dev, portFIFO, &cd_dma_fifo);
if (drive->media==ide_disk) {
if (unit) {
pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0x0F) | 0x50);
} else {
pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0xF0) | 0x05);
}
} else {
if (unit) {
pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0x0F);
} else {
pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0xF0);
}
}
pci_write_config_byte(dev, port, s_clc);
pci_write_config_byte(dev, port+drive->select.b.unit+2, (a_clc << 4) | r_clc);
local_irq_restore(flags);
/*
* setup active rec
* { 70, 165, 365 }, PIO Mode 0
* { 50, 125, 208 }, PIO Mode 1
* { 30, 100, 110 }, PIO Mode 2
* { 30, 80, 70 }, PIO Mode 3 with IORDY
* { 25, 70, 25 }, PIO Mode 4 with IORDY ns
* { 20, 50, 30 } PIO Mode 5 with IORDY (nonstandard)
*/
return pio;
}
/**
* ali15x3_tune_drive - set up drive for PIO mode
* @drive: drive to tune
* @pio: desired mode
*
* Program the controller with the best PIO timing for the given drive.
* Then set up the drive itself.
*/
static void ali15x3_tune_drive (ide_drive_t *drive, u8 pio)
{
pio = ali15x3_tune_pio(drive, pio);
(void) ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
/**
* ali15x3_can_ultra - check for ultra DMA support
* @drive: drive to do the check
*
* Check the drive and controller revisions. Return 0 if UDMA is
* not available, or 1 if UDMA can be used. The actual rules for
* the ALi are
* No UDMA on revisions <= 0x20
* Disk only for revisions < 0xC2
* Not WDC drives for revisions < 0xC2
*
* FIXME: WDC ifdef needs to die
*/
static u8 ali15x3_can_ultra (ide_drive_t *drive)
{
#ifndef CONFIG_WDC_ALI15X3
struct hd_driveid *id = drive->id;
#endif /* CONFIG_WDC_ALI15X3 */
if (m5229_revision <= 0x20) {
return 0;
} else if ((m5229_revision < 0xC2) &&
#ifndef CONFIG_WDC_ALI15X3
((chip_is_1543c_e && strstr(id->model, "WDC ")) ||
(drive->media!=ide_disk))) {
#else /* CONFIG_WDC_ALI15X3 */
(drive->media!=ide_disk)) {
#endif /* CONFIG_WDC_ALI15X3 */
return 0;
} else {
return 1;
}
}
/**
* ali15x3_ratemask - generate DMA mode list
* @drive: drive to compute against
*
* Generate a list of the available DMA modes for the drive.
* FIXME: this function contains lots of bogus masking we can dump
*
* Return the highest available mode (UDMA33, UDMA66, UDMA100,..)
*/
static u8 ali15x3_ratemask (ide_drive_t *drive)
{
u8 mode = 0, can_ultra = ali15x3_can_ultra(drive);
if (m5229_revision > 0xC4 && can_ultra) {
mode = 4;
} else if (m5229_revision == 0xC4 && can_ultra) {
mode = 3;
} else if (m5229_revision >= 0xC2 && can_ultra) {
mode = 2;
} else if (can_ultra) {
return 1;
} else {
return 0;
}
/*
* If the drive sees no suitable cable then UDMA 33
* is the highest permitted mode
*/
if (!eighty_ninty_three(drive))
mode = min(mode, (u8)1);
return mode;
}
/**
* ali15x3_tune_chipset - set up chipset/drive for new speed
* @drive: drive to configure for
* @xferspeed: desired speed
*
* Configure the hardware for the desired IDE transfer mode.
* We also do the needed drive configuration through helpers
*/
static int ali15x3_tune_chipset (ide_drive_t *drive, u8 xferspeed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
u8 speed = ide_rate_filter(ali15x3_ratemask(drive), xferspeed);
u8 speed1 = speed;
u8 unit = (drive->select.b.unit & 0x01);
u8 tmpbyte = 0x00;
int m5229_udma = (hwif->channel) ? 0x57 : 0x56;
if (speed == XFER_UDMA_6)
speed1 = 0x47;
if (speed < XFER_UDMA_0) {
u8 ultra_enable = (unit) ? 0x7f : 0xf7;
/*
* clear "ultra enable" bit
*/
pci_read_config_byte(dev, m5229_udma, &tmpbyte);
tmpbyte &= ultra_enable;
pci_write_config_byte(dev, m5229_udma, tmpbyte);
if (speed < XFER_SW_DMA_0)
(void) ali15x3_tune_pio(drive, speed - XFER_PIO_0);
} else {
pci_read_config_byte(dev, m5229_udma, &tmpbyte);
tmpbyte &= (0x0f << ((1-unit) << 2));
/*
* enable ultra dma and set timing
*/
tmpbyte |= ((0x08 | ((4-speed1)&0x07)) << (unit << 2));
pci_write_config_byte(dev, m5229_udma, tmpbyte);
if (speed >= XFER_UDMA_3) {
pci_read_config_byte(dev, 0x4b, &tmpbyte);
tmpbyte |= 1;
pci_write_config_byte(dev, 0x4b, tmpbyte);
}
}
return (ide_config_drive_speed(drive, speed));
}
/**
* config_chipset_for_dma - set up DMA mode
* @drive: drive to configure for
*
* Place a drive into DMA mode and tune the chipset for
* the selected speed.
*
* Returns true if DMA mode can be used
*/
static int config_chipset_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, ali15x3_ratemask(drive));
if (!(speed))
return 0;
(void) ali15x3_tune_chipset(drive, speed);
return ide_dma_enable(drive);
}
/**
* ali15x3_config_drive_for_dma - configure for DMA
* @drive: drive to configure
*
* Configure a drive for DMA operation. If DMA is not possible we
* drop the drive into PIO mode instead.
*/
static int ali15x3_config_drive_for_dma(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
struct hd_driveid *id = drive->id;
if ((m5229_revision<=0x20) && (drive->media!=ide_disk))
goto ata_pio;
drive->init_speed = 0;
if ((id != NULL) && ((id->capability & 1) != 0) && drive->autodma) {
/* Consult the list of known "bad" drives */
if (__ide_dma_bad_drive(drive))
goto ata_pio;
if ((id->field_valid & 4) && (m5229_revision >= 0xC2)) {
if (id->dma_ultra & hwif->ultra_mask) {
/* Force if Capable UltraDMA */
int dma = config_chipset_for_dma(drive);
if ((id->field_valid & 2) && !dma)
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 (!config_chipset_for_dma(drive))
goto ata_pio;
}
} else if (__ide_dma_good_drive(drive) &&
(id->eide_dma_time < 150)) {
/* Consult the list of known "good" drives */
if (!config_chipset_for_dma(drive))
goto ata_pio;
} else {
goto ata_pio;
}
} else {
ata_pio:
hwif->tuneproc(drive, 255);
return -1;
}
return 0;
}
/**
* ali15x3_dma_setup - begin a DMA phase
* @drive: target device
*
* Returns 1 if the DMA cannot be performed, zero on success.
*/
static int ali15x3_dma_setup(ide_drive_t *drive)
{
if (m5229_revision < 0xC2 && drive->media != ide_disk) {
if (rq_data_dir(drive->hwif->hwgroup->rq))
return 1; /* try PIO instead of DMA */
}
return ide_dma_setup(drive);
}
/**
* init_chipset_ali15x3 - Initialise an ALi IDE controller
* @dev: PCI device
* @name: Name of the controller
*
* This function initializes the ALI IDE controller and where
* appropriate also sets up the 1533 southbridge.
*/
static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const char *name)
{
unsigned long flags;
u8 tmpbyte;
struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));
pci_read_config_byte(dev, PCI_REVISION_ID, &m5229_revision);
isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS)
if (!ali_proc) {
ali_proc = 1;
bmide_dev = dev;
ide_pci_create_host_proc("ali", ali_get_info);
}
#endif /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_PROC_FS) */
local_irq_save(flags);
if (m5229_revision < 0xC2) {
/*
* revision 0x20 (1543-E, 1543-F)
* revision 0xC0, 0xC1 (1543C-C, 1543C-D, 1543C-E)
* clear CD-ROM DMA write bit, m5229, 0x4b, bit 7
*/
pci_read_config_byte(dev, 0x4b, &tmpbyte);
/*
* clear bit 7
*/
pci_write_config_byte(dev, 0x4b, tmpbyte & 0x7F);
goto out;
}
/*
* 1543C-B?, 1535, 1535D, 1553
* Note 1: not all "motherboard" support this detection
* Note 2: if no udma 66 device, the detection may "error".
* but in this case, we will not set the device to
* ultra 66, the detection result is not important
*/
/*
* enable "Cable Detection", m5229, 0x4b, bit3
*/
pci_read_config_byte(dev, 0x4b, &tmpbyte);
pci_write_config_byte(dev, 0x4b, tmpbyte | 0x08);
/*
* We should only tune the 1533 enable if we are using an ALi
* North bridge. We might have no north found on some zany
* box without a device at 0:0.0. The ALi bridge will be at
* 0:0.0 so if we didn't find one we know what is cooking.
*/
if (north && north->vendor != PCI_VENDOR_ID_AL)
goto out;
if (m5229_revision < 0xC5 && isa_dev)
{
/*
* set south-bridge's enable bit, m1533, 0x79
*/
pci_read_config_byte(isa_dev, 0x79, &tmpbyte);
if (m5229_revision == 0xC2) {
/*
* 1543C-B0 (m1533, 0x79, bit 2)
*/
pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x04);
} else if (m5229_revision >= 0xC3) {
/*
* 1553/1535 (m1533, 0x79, bit 1)
*/
pci_write_config_byte(isa_dev, 0x79, tmpbyte | 0x02);
}
}
out:
pci_dev_put(north);
pci_dev_put(isa_dev);
local_irq_restore(flags);
return 0;
}
/**
* ata66_ali15x3 - check for UDMA 66 support
* @hwif: IDE interface
*
* This checks if the controller and the cable are capable
* of UDMA66 transfers. It doesn't check the drives.
* But see note 2 below!
*
* FIXME: frobs bits that are not defined on newer ALi devicea
*/
static unsigned int __devinit ata66_ali15x3 (ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
unsigned int ata66 = 0;
u8 cable_80_pin[2] = { 0, 0 };
unsigned long flags;
u8 tmpbyte;
local_irq_save(flags);
if (m5229_revision >= 0xC2) {
/*
* Ultra66 cable detection (from Host View)
* m5229, 0x4a, bit0: primary, bit1: secondary 80 pin
*/
pci_read_config_byte(dev, 0x4a, &tmpbyte);
/*
* 0x4a, bit0 is 0 => primary channel
* has 80-pin (from host view)
*/
if (!(tmpbyte & 0x01)) cable_80_pin[0] = 1;
/*
* 0x4a, bit1 is 0 => secondary channel
* has 80-pin (from host view)
*/
if (!(tmpbyte & 0x02)) cable_80_pin[1] = 1;
/*
* Allow ata66 if cable of current channel has 80 pins
*/
ata66 = (hwif->channel)?cable_80_pin[1]:cable_80_pin[0];
} else {
/*
* check m1533, 0x5e, bit 1~4 == 1001 => & 00011110 = 00010010
*/
pci_read_config_byte(isa_dev, 0x5e, &tmpbyte);
chip_is_1543c_e = ((tmpbyte & 0x1e) == 0x12) ? 1: 0;
}
/*
* CD_ROM DMA on (m5229, 0x53, bit0)
* Enable this bit even if we want to use PIO
* PIO FIFO off (m5229, 0x53, bit1)
* The hardware will use 0x54h and 0x55h to control PIO FIFO
* (Not on later devices it seems)
*
* 0x53 changes meaning on later revs - we must no touch
* bit 1 on them. Need to check if 0x20 is the right break
*/
pci_read_config_byte(dev, 0x53, &tmpbyte);
if(m5229_revision <= 0x20)
tmpbyte = (tmpbyte & (~0x02)) | 0x01;
else if (m5229_revision == 0xc7 || m5229_revision == 0xc8)
tmpbyte |= 0x03;
else
tmpbyte |= 0x01;
pci_write_config_byte(dev, 0x53, tmpbyte);
local_irq_restore(flags);
return(ata66);
}
/**
* init_hwif_common_ali15x3 - Set up ALI IDE hardware
* @hwif: IDE interface
*
* Initialize the IDE structure side of the ALi 15x3 driver.
*/
static void __devinit init_hwif_common_ali15x3 (ide_hwif_t *hwif)
{
hwif->autodma = 0;
hwif->tuneproc = &ali15x3_tune_drive;
hwif->speedproc = &ali15x3_tune_chipset;
/* don't use LBA48 DMA on ALi devices before rev 0xC5 */
hwif->no_lba48_dma = (m5229_revision <= 0xC4) ? 1 : 0;
if (!hwif->dma_base) {
hwif->drives[0].autotune = 1;
hwif->drives[1].autotune = 1;
return;
}
hwif->atapi_dma = 1;
if (m5229_revision > 0x20)
hwif->ultra_mask = 0x7f;
hwif->mwdma_mask = 0x07;
hwif->swdma_mask = 0x07;
if (m5229_revision >= 0x20) {
/*
* M1543C or newer for DMAing
*/
hwif->ide_dma_check = &ali15x3_config_drive_for_dma;
hwif->dma_setup = &ali15x3_dma_setup;
if (!noautodma)
hwif->autodma = 1;
if (!(hwif->udma_four))
hwif->udma_four = ata66_ali15x3(hwif);
}
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
}
/**
* init_hwif_ali15x3 - Initialize the ALI IDE x86 stuff
* @hwif: interface to configure
*
* Obtain the IRQ tables for an ALi based IDE solution on the PC
* class platforms. This part of the code isn't applicable to the
* Sparc systems
*/
static void __devinit init_hwif_ali15x3 (ide_hwif_t *hwif)
{
u8 ideic, inmir;
s8 irq_routing_table[] = { -1, 9, 3, 10, 4, 5, 7, 6,
1, 11, 0, 12, 0, 14, 0, 15 };
int irq = -1;
if (hwif->pci_dev->device == PCI_DEVICE_ID_AL_M5229)
hwif->irq = hwif->channel ? 15 : 14;
if (isa_dev) {
/*
* read IDE interface control
*/
pci_read_config_byte(isa_dev, 0x58, &ideic);
/* bit0, bit1 */
ideic = ideic & 0x03;
/* get IRQ for IDE Controller */
if ((hwif->channel && ideic == 0x03) ||
(!hwif->channel && !ideic)) {
/*
* get SIRQ1 routing table
*/
pci_read_config_byte(isa_dev, 0x44, &inmir);
inmir = inmir & 0x0f;
irq = irq_routing_table[inmir];
} else if (hwif->channel && !(ideic & 0x01)) {
/*
* get SIRQ2 routing table
*/
pci_read_config_byte(isa_dev, 0x75, &inmir);
inmir = inmir & 0x0f;
irq = irq_routing_table[inmir];
}
if(irq >= 0)
hwif->irq = irq;
}
init_hwif_common_ali15x3(hwif);
}
/**
* init_dma_ali15x3 - set up DMA on ALi15x3
* @hwif: IDE interface
* @dmabase: DMA interface base PCI address
*
* Set up the DMA functionality on the ALi 15x3. For the ALi
* controllers this is generic so we can let the generic code do
* the actual work.
*/
static void __devinit init_dma_ali15x3 (ide_hwif_t *hwif, unsigned long dmabase)
{
if (m5229_revision < 0x20)
return;
if (!hwif->channel)
outb(inb(dmabase + 2) & 0x60, dmabase + 2);
ide_setup_dma(hwif, dmabase, 8);
}
static ide_pci_device_t ali15x3_chipset __devinitdata = {
.name = "ALI15X3",
.init_chipset = init_chipset_ali15x3,
.init_hwif = init_hwif_ali15x3,
.init_dma = init_dma_ali15x3,
.channels = 2,
.autodma = AUTODMA,
.bootable = ON_BOARD,
};
/**
* alim15x3_init_one - set up an ALi15x3 IDE controller
* @dev: PCI device to set up
*
* Perform the actual set up for an ALi15x3 that has been found by the
* hot plug layer.
*/
static int __devinit alim15x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
static struct pci_device_id ati_rs100[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS100) },
{ },
};
ide_pci_device_t *d = &ali15x3_chipset;
if (pci_dev_present(ati_rs100))
printk(KERN_WARNING "alim15x3: ATI Radeon IGP Northbridge is not yet fully tested.\n");
#if defined(CONFIG_SPARC64)
d->init_hwif = init_hwif_common_ali15x3;
#endif /* CONFIG_SPARC64 */
return ide_setup_pci_device(dev, d);
}
static struct pci_device_id alim15x3_pci_tbl[] = {
{ PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5228, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, alim15x3_pci_tbl);
static struct pci_driver driver = {
.name = "ALI15x3_IDE",
.id_table = alim15x3_pci_tbl,
.probe = alim15x3_init_one,
};
static int __init ali15x3_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(ali15x3_ide_init);
MODULE_AUTHOR("Michael Aubry, Andrzej Krzysztofowicz, CJ, Andre Hedrick, Alan Cox");
MODULE_DESCRIPTION("PCI driver module for ALi 15x3 IDE");
MODULE_LICENSE("GPL");
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