diff options
Diffstat (limited to 'src/southbridge/amd/amd8111/amd8111_early_smbus.c')
| -rw-r--r-- | src/southbridge/amd/amd8111/amd8111_early_smbus.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/southbridge/amd/amd8111/amd8111_early_smbus.c b/src/southbridge/amd/amd8111/amd8111_early_smbus.c index 8ad3589e63..c8996784de 100644 --- a/src/southbridge/amd/amd8111/amd8111_early_smbus.c +++ b/src/southbridge/amd/amd8111/amd8111_early_smbus.c @@ -5,17 +5,25 @@ static void enable_smbus(void) { device_t dev; + uint8_t enable; + dev = pci_locate_device(PCI_ID(0x1022, 0x746b), 0); if (dev == PCI_DEV_INVALID) { die("SMBUS controller not found\r\n"); } - uint8_t enable; - print_spew("SMBus controller enabled\r\n"); + pci_write_config32(dev, 0x58, SMBUS_IO_BASE | 1); enable = pci_read_config8(dev, 0x41); pci_write_config8(dev, 0x41, enable | (1 << 7)); + + /* check that we can see the smbus controller I/O. */ + if (inw(SMBUS_IO_BASE)==0xFF){ + die("SMBUS controller I/O not found\n"); + } + /* clear any lingering errors, so the transaction will run */ outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS); + print_spew("SMBus controller enabled\r\n"); } static int smbus_recv_byte(unsigned device) |