diff options
| -rw-r--r-- | drivers/pci/quirks.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 89ed181cd90c..857ae01734a6 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -163,6 +163,26 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_d DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs); /* + * Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear + * for some HT machines to use C4 w/o hanging. + */ +static void __devinit quirk_tigerpoint_bm_sts(struct pci_dev *dev) +{ + u32 pmbase; + u16 pm1a; + + pci_read_config_dword(dev, 0x40, &pmbase); + pmbase = pmbase & 0xff80; + pm1a = inw(pmbase); + + if (pm1a & 0x10) { + dev_info(&dev->dev, FW_BUG "TigerPoint LPC.BM_STS cleared\n"); + outw(0x10, pmbase); + } +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_TGP_LPC, quirk_tigerpoint_bm_sts); + +/* * Chipsets where PCI->PCI transfers vanish or hang */ static void __devinit quirk_nopcipci(struct pci_dev *dev) |