diff options
Diffstat (limited to 'src/southbridge/nvidia/mcp55/early_smbus.c')
| -rw-r--r-- | src/southbridge/nvidia/mcp55/early_smbus.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/src/southbridge/nvidia/mcp55/early_smbus.c b/src/southbridge/nvidia/mcp55/early_smbus.c index b351b58022..254ec7689a 100644 --- a/src/southbridge/nvidia/mcp55/early_smbus.c +++ b/src/southbridge/nvidia/mcp55/early_smbus.c @@ -24,8 +24,8 @@ #include "smbus.h" #define SMBUS0_IO_BASE 0x1000 -#define SMBUS1_IO_BASE (0x1000+(1<<8)) -/*SIZE 0x40 */ +#define SMBUS1_IO_BASE (0x1000 + (1 << 8)) +/* Size: 0x40 */ static void enable_smbus(void) { @@ -35,12 +35,14 @@ static void enable_smbus(void) if (dev == PCI_DEV_INVALID) die("SMBus controller not found\n"); - /* set smbus iobase */ + /* Set SMBus I/O base. */ pci_write_config32(dev, 0x20, SMBUS0_IO_BASE | 1); pci_write_config32(dev, 0x24, SMBUS1_IO_BASE | 1); - /* Set smbus iospace enable */ + + /* Set SMBus I/O space enable. */ pci_write_config16(dev, 0x4, 0x01); - /* clear any lingering errors, so the transaction will run */ + + /* Clear any lingering errors, so the transaction will run. */ outb(inb(SMBUS0_IO_BASE + SMBHSTSTAT), SMBUS0_IO_BASE + SMBHSTSTAT); outb(inb(SMBUS1_IO_BASE + SMBHSTSTAT), SMBUS1_IO_BASE + SMBHSTSTAT); } @@ -60,28 +62,34 @@ static inline int smbus_read_byte(unsigned device, unsigned address) return do_smbus_read_byte(SMBUS0_IO_BASE, device, address); } -static inline int smbus_write_byte(unsigned device, unsigned address, unsigned char val) +static inline int smbus_write_byte(unsigned device, unsigned address, + unsigned char val) { return do_smbus_write_byte(SMBUS0_IO_BASE, device, address, val); } static inline int smbusx_recv_byte(unsigned smb_index, unsigned device) { - return do_smbus_recv_byte(SMBUS0_IO_BASE + (smb_index<<8), device); + return do_smbus_recv_byte(SMBUS0_IO_BASE + (smb_index << 8), device); } -static inline int smbusx_send_byte(unsigned smb_index, unsigned device, unsigned char val) +static inline int smbusx_send_byte(unsigned smb_index, unsigned device, + unsigned char val) { - return do_smbus_send_byte(SMBUS0_IO_BASE + (smb_index<<8), device, val); + return do_smbus_send_byte(SMBUS0_IO_BASE + (smb_index << 8), + device, val); } -static inline int smbusx_read_byte(unsigned smb_index, unsigned device, unsigned address) +static inline int smbusx_read_byte(unsigned smb_index, unsigned device, + unsigned address) { - return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address); + return do_smbus_read_byte(SMBUS0_IO_BASE + (smb_index << 8), + device, address); } -static inline int smbusx_write_byte(unsigned smb_index, unsigned device, unsigned address, unsigned char val) +static inline int smbusx_write_byte(unsigned smb_index, unsigned device, + unsigned address, unsigned char val) { - return do_smbus_write_byte(SMBUS0_IO_BASE + (smb_index<<8), device, address, val); + return do_smbus_write_byte(SMBUS0_IO_BASE + (smb_index << 8), + device, address, val); } - |