diff options
| author | Conke Hu <conke.hu@amd.com> | 2007-01-27 13:46:40 +0100 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-01-27 13:46:40 +0100 |
| commit | e5c073ff24604d4dbb2fbcedb17da6df768468d3 (patch) | |
| tree | d5a35e31c96310c4f86afcd6e5ad96a5887d1d60 /drivers/ide | |
| parent | b25168dfdc162b4198fa6395cd191a20dddc6d34 (diff) | |
| download | kernel_samsung_crespo-e5c073ff24604d4dbb2fbcedb17da6df768468d3.zip kernel_samsung_crespo-e5c073ff24604d4dbb2fbcedb17da6df768468d3.tar.gz kernel_samsung_crespo-e5c073ff24604d4dbb2fbcedb17da6df768468d3.tar.bz2 | |
atiixp.c: add cable detection support for ATI IDE
IDE HDD does not work if it uses a 40-pin PATA cable on ATI chipset.
This patch fixes the bug.
Signed-off-by: Conke Hu <conke.hu@amd.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
| -rw-r--r-- | drivers/ide/pci/atiixp.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c index 5b7e000..7e1d070 100644 --- a/drivers/ide/pci/atiixp.c +++ b/drivers/ide/pci/atiixp.c @@ -291,8 +291,12 @@ fast_ata_pio: static void __devinit init_hwif_atiixp(ide_hwif_t *hwif) { + u8 udma_mode = 0; + u8 ch = hwif->channel; + struct pci_dev *pdev = hwif->pci_dev; + if (!hwif->irq) - hwif->irq = hwif->channel ? 15 : 14; + hwif->irq = ch ? 15 : 14; hwif->autodma = 0; hwif->tuneproc = &atiixp_tuneproc; @@ -308,8 +312,12 @@ static void __devinit init_hwif_atiixp(ide_hwif_t *hwif) hwif->mwdma_mask = 0x06; hwif->swdma_mask = 0x04; - /* FIXME: proper cable detection needed */ - hwif->udma_four = 1; + pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode); + if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40) + hwif->udma_four = 1; + else + hwif->udma_four = 0; + hwif->ide_dma_host_on = &atiixp_ide_dma_host_on; hwif->ide_dma_host_off = &atiixp_ide_dma_host_off; hwif->ide_dma_check = &atiixp_dma_check; |