diff options
Diffstat (limited to 'src/southbridge/amd/cimx')
| -rw-r--r-- | src/southbridge/amd/cimx/sb800/late.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/southbridge/amd/cimx/sb800/late.c b/src/southbridge/amd/cimx/sb800/late.c index 7367a18708..b16bc50736 100644 --- a/src/southbridge/amd/cimx/sb800/late.c +++ b/src/southbridge/amd/cimx/sb800/late.c @@ -248,6 +248,21 @@ static const struct pci_driver gec_driver __pci_driver = { .device = PCI_DEVICE_ID_ATI_SB800_GEC, }; +/** + * @brief Enable PCI Bridge + * + * PcibConfig [PM_Reg: EAh], PCIDisable [Bit0] + * 'PCIDisable' set to 0 to enable P2P bridge. + * 'PCIDisable' set to 1 to disable P2P bridge and enable PCI interface pins + * to function as GPIO {GPIO 35:0}. + */ +static void pci_init(device_t dev) +{ + /* PCI Bridge SHOULD be enabled by default according to SB800 rrg, + * but actually was disabled in some platform, so I have to enabled it. + */ + RWMEM(ACPI_MMIO_BASE + PMIO_BASE + SB_PMIOA_REGEA, AccWidthUint8, ~BIT0, 0); +} static void pcie_init(device_t dev) { @@ -258,7 +273,7 @@ static struct device_operations pci_ops = { .read_resources = pci_bus_read_resources, .set_resources = pci_dev_set_resources, .enable_resources = pci_bus_enable_resources, - .init = pcie_init, + .init = pci_init, .scan_bus = pci_scan_bridge, .reset_bus = pci_bus_reset, .ops_pci = &lops_pci, |