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alim15x3: fix handling of UDMA enable bit 

Clear UDMA enable bit also for PIO modes.

Based on libata pata_ali host driver.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2010-01-18 07:21:26 +00:00 коммит произвёл David S. Miller
Родитель a345c7856e
Коммит e4c7112b56
1 изменённых файлов: 18 добавлений и 25 удалений
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43
drivers/ide/alim15x3.c
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@ -62,11 +62,22 @@ static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
}
static void ali_program_timings(ide_hwif_t *hwif, ide_drive_t *drive,
struct ide_timing *t)
struct ide_timing *t, u8 ultra)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
int port = hwif->channel ? 0x5c : 0x58;
u8 unit = drive->dn & 1;
int udmat = 0x56 + hwif->channel;
u8 unit = drive->dn & 1, udma;
int shift = 4 * unit;
/* Set up the UDMA */
pci_read_config_byte(dev, udmat, &udma);
udma &= ~(0x0F << shift);
udma |= ultra << shift;
pci_write_config_byte(dev, udmat, udma);
if (t == NULL)
return;
t->setup = clamp_val(t->setup, 1, 8) & 7;
t->act8b = clamp_val(t->act8b, 1, 8) & 7;
@ -114,7 +125,7 @@ static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
*/
ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);
ali_program_timings(hwif, drive, &t);
ali_program_timings(hwif, drive, &t, 0);
}
/**
@ -152,29 +163,16 @@ static u8 ali_udma_filter(ide_drive_t *drive)
static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
struct pci_dev *dev = to_pci_dev(hwif->dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
unsigned long T = 1000000 / bus_speed; /* PCI clock based */
const u8 speed = drive->dma_mode;
u8 speed1 = speed;
u8 unit = drive->dn & 1;
u8 tmpbyte = 0x00;
int m5229_udma = (hwif->channel) ? 0x57 : 0x56;
struct ide_timing t;
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);
ide_timing_compute(drive, drive->dma_mode, &t, T, 1);
if (pair) {
struct ide_timing p;
@ -189,15 +187,10 @@ static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
IDE_TIMING_SETUP | IDE_TIMING_8BIT);
}
}
ali_program_timings(hwif, drive, &t);
ali_program_timings(hwif, drive, &t, 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);
ali_program_timings(hwif, drive, NULL,
udma_timing[speed - XFER_UDMA_0]);
if (speed >= XFER_UDMA_3) {
pci_read_config_byte(dev, 0x4b, &tmpbyte);
tmpbyte |= 1;