diff options
Diffstat (limited to 'arch/powerpc/platforms/chrp')
| -rw-r--r-- | arch/powerpc/platforms/chrp/pci.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c index 0c6dba9..974952e 100644 --- a/arch/powerpc/platforms/chrp/pci.c +++ b/arch/powerpc/platforms/chrp/pci.c @@ -338,3 +338,32 @@ void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105) } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, chrp_pci_fixup_winbond_ata); + +/* Pegasos2 firmware version 20040810 configures the built-in IDE controller + * in legacy mode, but sets the PCI registers to PCI native mode. + * The chip can only operate in legacy mode, so force the PCI class into legacy + * mode as well. The same fixup must be done to the class-code property in + * the IDE node /pci@80000000/ide@C,1 + */ +static void chrp_pci_fixup_vt8231_ata(struct pci_dev *viaide) +{ + u8 progif; + struct pci_dev *viaisa; + + if (!machine_is(chrp) || _chrp_type != _CHRP_Pegasos) + return; + if (viaide->irq != 14) + return; + + viaisa = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL); + if (!viaisa) + return; + printk("Fixing VIA IDE, force legacy mode on '%s'\n", viaide->dev.bus_id); + + pci_read_config_byte(viaide, PCI_CLASS_PROG, &progif); + pci_write_config_byte(viaide, PCI_CLASS_PROG, progif & ~0x5); + viaide->class &= ~0x5; + + pci_dev_put(viaisa); +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, chrp_pci_fixup_vt8231_ata); |