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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/pdc202xx_new.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/pdc202xx_new.c')
-rw-r--r--drivers/ide/pci/pdc202xx_new.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/ide/pci/pdc202xx_new.c b/drivers/ide/pci/pdc202xx_new.c
index 0765dce6948..ee5020df005 100644
--- a/drivers/ide/pci/pdc202xx_new.c
+++ b/drivers/ide/pci/pdc202xx_new.c
@@ -225,7 +225,10 @@ static void pdcnew_tune_drive(ide_drive_t *drive, u8 pio)
static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
{
- return get_indexed_reg(hwif, 0x0b) & 0x04;
+ if (get_indexed_reg(hwif, 0x0b) & 0x04)
+ return ATA_CBL_PATA40;
+ else
+ return ATA_CBL_PATA80;
}
static int pdcnew_config_drive_xfer_rate(ide_drive_t *drive)
@@ -509,8 +512,8 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
hwif->ide_dma_check = &pdcnew_config_drive_xfer_rate;
- if (!hwif->udma_four)
- hwif->udma_four = pdcnew_cable_detect(hwif) ? 0 : 1;
+ if (hwif->cbl != ATA_CBL_PATA40_SHORT)
+ hwif->cbl = pdcnew_cable_detect(hwif);
if (!noautodma)
hwif->autodma = 1;