diff options
Diffstat (limited to 'src/southbridge/amd/amd8111/amd8111_early_smbus.c')
| -rw-r--r-- | src/southbridge/amd/amd8111/amd8111_early_smbus.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/southbridge/amd/amd8111/amd8111_early_smbus.c b/src/southbridge/amd/amd8111/amd8111_early_smbus.c index e0aaa05ff4..b9f142dc8e 100644 --- a/src/southbridge/amd/amd8111/amd8111_early_smbus.c +++ b/src/southbridge/amd/amd8111/amd8111_early_smbus.c @@ -21,6 +21,8 @@ static void enable_smbus(void) pci_write_config32(dev, 0x58, SMBUS_IO_BASE | 1); enable = pci_read_config8(dev, 0x41); pci_write_config8(dev, 0x41, enable | (1 << 7)); + /* clear any lingering errors, so the transaction will run */ + outw(inw(SMBUS_IO_BASE + SMBGSTATUS), SMBUS_IO_BASE + SMBGSTATUS); } @@ -40,8 +42,12 @@ static int smbus_wait_until_ready(void) if ((val & 0x800) == 0) { break; } + if(loops == (SMBUS_TIMEOUT / 2)) { + outw(inw(SMBUS_IO_BASE + SMBGSTATUS), + SMBUS_IO_BASE + SMBGSTATUS); + } } while(--loops); - return loops?0:-1; + return loops?0:-2; } static int smbus_wait_until_done(void) @@ -57,7 +63,7 @@ static int smbus_wait_until_done(void) break; } } while(--loops); - return loops?0:-1; + return loops?0:-3; } static int smbus_read_byte(unsigned device, unsigned address) @@ -67,7 +73,7 @@ static int smbus_read_byte(unsigned device, unsigned address) unsigned char byte; if (smbus_wait_until_ready() < 0) { - return -1; + return -2; } /* setup transaction */ @@ -93,7 +99,7 @@ static int smbus_read_byte(unsigned device, unsigned address) /* poll for transaction completion */ if (smbus_wait_until_done() < 0) { - return -1; + return -3; } global_status_register = inw(SMBUS_IO_BASE + SMBGSTATUS); |