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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/amd74xx.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/amd74xx.c')
-rw-r--r--drivers/ide/pci/amd74xx.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index a7443f15b27a..84ed30cdb324 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -431,8 +431,13 @@ static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
if ((amd_config->flags & AMD_BAD_SWDMA) == 0)
hwif->swdma_mask = 0x07;
- if (!hwif->udma_four)
- hwif->udma_four = (amd_80w >> hwif->channel) & 1;
+ if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
+ if ((amd_80w >> hwif->channel) & 1)
+ hwif->cbl = ATA_CBL_PATA80;
+ else
+ hwif->cbl = ATA_CBL_PATA40;
+ }
+
hwif->ide_dma_check = &amd74xx_ide_dma_check;
if (!noautodma)
hwif->autodma = 1;