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/aec62xx.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/ide/pci/aec62xx.c') diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c index 794ac40ec90..e5d09367627 100644 --- a/drivers/ide/pci/aec62xx.c +++ b/drivers/ide/pci/aec62xx.c @@ -234,11 +234,12 @@ static void __devinit init_hwif_aec62xx(ide_hwif_t *hwif) pci_read_config_byte (dev, 0x54, ®54); pci_write_config_byte(dev, 0x54, (reg54 & ~mask)); spin_unlock_irqrestore(&ide_lock, flags); - } else if (!hwif->udma_four) { + } else if (hwif->cbl != ATA_CBL_PATA40_SHORT) { u8 ata66 = 0, mask = hwif->channel ? 0x02 : 0x01; pci_read_config_byte(hwif->pci_dev, 0x49, &ata66); - hwif->udma_four = (ata66 & mask) ? 0 : 1; + + hwif->cbl = (ata66 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; } if (!noautodma) -- cgit v1.2.3