Commit 3a540dab authored by Jeff Garzik's avatar Jeff Garzik

[PCI, libata] Fix "combined mode" PCI quirk for ICH6

The hardware vendor, in their infinite wisdom, make the combined
mode configuration register different between ICH5 and ICH6.

Take this into account.
parent 95d54ab0
......@@ -817,6 +817,7 @@ static void __init quirk_alder_ioapic(struct pci_dev *pdev)
static void __init quirk_intel_ide_combined(struct pci_dev *pdev)
{
u8 prog, comb, tmp;
int ich = 0;
/*
* Narrow down to Intel SATA PCI devices.
......@@ -827,8 +828,12 @@ static void __init quirk_intel_ide_combined(struct pci_dev *pdev)
case 0x24df:
case 0x25a3:
case 0x25b0:
ich = 5;
break;
case 0x2651:
case 0x2652:
case 0x2653:
ich = 6;
break;
default:
/* we do not handle this PCI device */
......@@ -839,6 +844,8 @@ static void __init quirk_intel_ide_combined(struct pci_dev *pdev)
* Read combined mode register.
*/
pci_read_config_byte(pdev, 0x90, &tmp); /* combined mode reg */
if (ich == 5) {
tmp &= 0x6; /* interesting bits 2:1, PATA primary/secondary */
if (tmp == 0x4) /* bits 10x */
comb = (1 << 0); /* SATA port 0, PATA port 1 */
......@@ -846,6 +853,16 @@ static void __init quirk_intel_ide_combined(struct pci_dev *pdev)
comb = (1 << 2); /* PATA port 0, SATA port 1 */
else
return; /* not in combined mode */
} else {
WARN_ON(ich != 6);
tmp &= 0x3; /* interesting bits 1:0 */
if (tmp & (1 << 0))
comb = (1 << 2); /* PATA port 0, SATA port 1 */
else if (tmp & (1 << 1))
comb = (1 << 0); /* SATA port 0, PATA port 1 */
else
return; /* not in combined mode */
}
/*
* Read programming interface register.
......
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