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ide: add short cables support

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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2007-07-09 23:17:58 +02:00
parent 75b1d97535
commit 49521f97cc
25 changed files with 124 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/ide/pci/cmd64x.c
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@@ -517,7 +517,7 @@ static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const cha
return 0;
}
static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif)
static u8 __devinit ata66_cmd64x(ide_hwif_t *hwif)
{
struct pci_dev *dev = hwif->pci_dev;
u8 bmidecsr = 0, mask = hwif->channel ? 0x02 : 0x01;
@@ -526,9 +526,9 @@ static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif)
case PCI_DEVICE_ID_CMD_648:
case PCI_DEVICE_ID_CMD_649:
pci_read_config_byte(dev, BMIDECSR, &bmidecsr);
return (bmidecsr & mask) ? 1 : 0;
return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
default:
return 0;
return ATA_CBL_PATA40;
}
}
@@ -568,8 +568,8 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
hwif->ide_dma_check = &cmd64x_config_drive_for_dma;
if (!hwif->udma_four)
hwif->udma_four = ata66_cmd64x(hwif);
if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = ata66_cmd64x(hwif);
switch (dev->device) {
case PCI_DEVICE_ID_CMD_648: