From 49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Mon, 9 Jul 2007 23:17:58 +0200 Subject: 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 Reviewed-by: Sergei Shtylyov --- drivers/ide/pci/it821x.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'drivers/ide/pci/it821x.c') diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c index 3aeb7f1b7916..8197b653ba1e 100644 --- a/drivers/ide/pci/it821x.c +++ b/drivers/ide/pci/it821x.c @@ -491,10 +491,10 @@ static int it821x_config_drive_for_dma (ide_drive_t *drive) * the needed logic onboard. */ -static unsigned int __devinit ata66_it821x(ide_hwif_t *hwif) +static u8 __devinit ata66_it821x(ide_hwif_t *hwif) { /* The reference driver also only does disk side */ - return 1; + return ATA_CBL_PATA80; } /** @@ -662,8 +662,9 @@ static void __devinit init_hwif_it821x(ide_hwif_t *hwif) hwif->mwdma_mask = 0x07; hwif->ide_dma_check = &it821x_config_drive_for_dma; - if (!(hwif->udma_four)) - hwif->udma_four = ata66_it821x(hwif); + + if (hwif->cbl != ATA_CBL_PATA40_SHORT) + hwif->cbl = ata66_it821x(hwif); /* * The BIOS often doesn't set up DMA on this controller -- cgit v1.2.3