diff options
| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2010-01-18 07:21:26 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-19 01:52:31 -0800 |
| commit | e4c7112b5686c70ba7be86dbc83c989c75aca802 (patch) | |
| tree | 3c3e11ddee39d18eea78ee1d61307da9ff38aaf8 | |
| parent | a345c7856e52bf8b21a5ae6a24fb824bfedefbe9 (diff) | |
| download | kernel-common-e4c7112b5686c70ba7be86dbc83c989c75aca802.tar.gz kernel-common-e4c7112b5686c70ba7be86dbc83c989c75aca802.tar.bz2 kernel-common-e4c7112b5686c70ba7be86dbc83c989c75aca802.zip | |
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>
| -rw-r--r-- | drivers/ide/alim15x3.c | 43 |
1 files changed, 18 insertions, 25 deletions
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c index 3ba7d0bdd25d..2c8016ad0e26 100644 --- a/drivers/ide/alim15x3.c +++ b/drivers/ide/alim15x3.c @@ -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; |