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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-07-09 23:17:58 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-07-09 23:17:58 +0200
commit49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb (patch)
treef61c34da6092f2f1a97a78da567afc59ad40850b /drivers/ide/pci/atiixp.c
parent75b1d97535327d0428c6bffd9d5407e65546fd5d (diff)
ide: add short cables support
This patch allows users to override both host and device side cable detection with "ideX=ata66" kernel parameter. Thanks to this it should be now possible to use UDMA > 2 modes on systems (laptops mainly) which use short 40-pin cable instead of 80-pin one. Next patches add automatic detection of some systems using short cables. Changes: * Rename hwif->udma_four to hwif->cbl and make it u8. * Convert all existing users accordingly (use ATA_CBL_* defines while at it). * Add ATA_CBL_PATA40_SHORT support to ide-iops.c:eighty_ninty_three(). * Use ATA_CBL_PATA40_SHORT for "ideX=ata66" kernel parameter. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Reviewed-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Diffstat (limited to 'drivers/ide/pci/atiixp.c')
-rw-r--r--drivers/ide/pci/atiixp.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c
index 8ab33faf6f7..2761510309b 100644
--- a/drivers/ide/pci/atiixp.c
+++ b/drivers/ide/pci/atiixp.c
@@ -264,10 +264,11 @@ static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
hwif->swdma_mask = 0x04;
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;
+ hwif->cbl = ATA_CBL_PATA80;
else
- hwif->udma_four = 0;
+ hwif->cbl = ATA_CBL_PATA40;
hwif->dma_host_on = &atiixp_dma_host_on;
hwif->dma_host_off = &atiixp_dma_host_off;