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/atiixp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/ide/pci/atiixp.c') 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; -- cgit v1.2.3