diff options
Diffstat (limited to 'src/southbridge/amd/cs5535/early_smbus.c')
-rw-r--r-- | src/southbridge/amd/cs5535/early_smbus.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/southbridge/amd/cs5535/early_smbus.c b/src/southbridge/amd/cs5535/early_smbus.c new file mode 100644 index 0000000000..25b6951daa --- /dev/null +++ b/src/southbridge/amd/cs5535/early_smbus.c @@ -0,0 +1,22 @@ +#include "smbus.h" + +#define SMBUS_IO_BASE 0x6000 + +/* initialization for SMBus Controller */ +static void cs5535_enable_smbus(void) +{ + unsigned char val; + + /* reset SMBUS controller */ + outb(0, SMBUS_IO_BASE + SMB_CTRL2); + + /* Set SCL freq and enable SMB controller */ + val = inb(SMBUS_IO_BASE + SMB_CTRL2); + val |= ((0x20 << 1) | SMB_CTRL2_ENABLE); + outb(val, SMBUS_IO_BASE + SMB_CTRL2); + + /* Setup SMBus host controller address to 0xEF */ + val = inb(SMBUS_IO_BASE + SMB_ADD); + val |= (0xEF | SMB_ADD_SAEN); + outb(val, SMBUS_IO_BASE + SMB_ADD); +} |