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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

20
drivers/ide/pci/siimage.c
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@@ -933,16 +933,17 @@ static void __devinit init_iops_siimage(ide_hwif_t *hwif)
* interface.
*/
static unsigned int __devinit ata66_siimage(ide_hwif_t *hwif)
static u8 __devinit ata66_siimage(ide_hwif_t *hwif)
{
unsigned long addr = siimage_selreg(hwif, 0);
if (pci_get_drvdata(hwif->pci_dev) == NULL) {
u8 ata66 = 0;
pci_read_config_byte(hwif->pci_dev, addr, &ata66);
return (ata66 & 0x01) ? 1 : 0;
}
u8 ata66 = 0;
return (hwif->INB(addr) & 0x01) ? 1 : 0;
if (pci_get_drvdata(hwif->pci_dev) == NULL)
pci_read_config_byte(hwif->pci_dev, addr, &ata66);
else
ata66 = hwif->INB(addr);
return (ata66 & 0x01) ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
}
/**
@@ -988,8 +989,9 @@ static void __devinit init_hwif_siimage(ide_hwif_t *hwif)
hwif->atapi_dma = 1;
hwif->ide_dma_check = &siimage_config_drive_for_dma;
if (!(hwif->udma_four))
hwif->udma_four = ata66_siimage(hwif);
if (hwif->cbl != ATA_CBL_PATA40_SHORT)
hwif->cbl = ata66_siimage(hwif);
if (hwif->mmio) {
hwif->ide_dma_test_irq = &siimage_mmio_ide_dma_test_irq;