diff options
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 59 |
1 files changed, 54 insertions, 5 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 81d19d5683ac..3ea0b29c0104 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -368,8 +368,9 @@ static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region, bus_region.end = res->end; pcibios_bus_to_resource(dev, res, &bus_region); - pci_claim_resource(dev, nr); - dev_info(&dev->dev, "quirk: %pR claimed by %s\n", res, name); + if (pci_claim_resource(dev, nr) == 0) + dev_info(&dev->dev, "quirk: %pR claimed by %s\n", + res, name); } } @@ -1977,11 +1978,25 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev) /* * Disable PCI Bus Parking and PCI Master read caching on CX700 * which causes unspecified timing errors with a VT6212L on the PCI - * bus leading to USB2.0 packet loss. The defaults are that these - * features are turned off but some BIOSes turn them on. + * bus leading to USB2.0 packet loss. + * + * This quirk is only enabled if a second (on the external PCI bus) + * VT6212L is found -- the CX700 core itself also contains a USB + * host controller with the same PCI ID as the VT6212L. */ + /* Count VT6212L instances */ + struct pci_dev *p = pci_get_device(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_8235_USB_2, NULL); uint8_t b; + + /* p should contain the first (internal) VT6212L -- see if we have + an external one by searching again */ + p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p); + if (!p) + return; + pci_dev_put(p); + if (pci_read_config_byte(dev, 0x76, &b) == 0) { if (b & 0x40) { /* Turn off PCI Bus Parking */ @@ -2008,7 +2023,7 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev) } } } -DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching); /* * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the @@ -2108,6 +2123,7 @@ static void __devinit quirk_disable_msi(struct pci_dev *dev) } } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi); /* Go through the list of Hypertransport capabilities and * return 1 if a HT MSI capability is found and enabled */ @@ -2479,6 +2495,39 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4374, DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375, quirk_msi_intx_disable_bug); +/* + * MSI does not work with the AMD RS780/RS880 internal graphics and HDMI audio + * devices unless the BIOS has initialized the nb_cntl.strap_msi_enable bit. + */ +static void __init rs780_int_gfx_disable_msi(struct pci_dev *int_gfx_bridge) +{ + u32 nb_cntl; + + if (!int_gfx_bridge->subordinate) + return; + + pci_bus_write_config_dword(int_gfx_bridge->bus, PCI_DEVFN(0, 0), + 0x60, 0); + pci_bus_read_config_dword(int_gfx_bridge->bus, PCI_DEVFN(0, 0), + 0x64, &nb_cntl); + + if (!(nb_cntl & BIT(10))) { + dev_warn(&int_gfx_bridge->dev, + FW_WARN "RS780: MSI for internal graphics disabled\n"); + int_gfx_bridge->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI; + } +} + +#define PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX 0x9602 + +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, + PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX, + rs780_int_gfx_disable_msi); +/* wrong vendor ID on M4A785TD motherboard: */ +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASUSTEK, + PCI_DEVICE_ID_AMD_RS780_P2P_INT_GFX, + rs780_int_gfx_disable_msi); + #endif /* CONFIG_PCI_MSI */ #ifdef CONFIG_PCI_IOV |