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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/aec62xx.c
parentide: convert ide_find_best_mode() users to use ide_max_dma_mode() (diff)
downloadlinux-dev-49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb.tar.xz
linux-dev-49521f97ccd3c2bf6e71a91cea8fe65d170fa4fb.zip
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/aec62xx.c')
-rw-r--r--drivers/ide/pci/aec62xx.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index 794ac40ec90f..e5d09367627e 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, &reg54);
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)