diff options
Diffstat (limited to 'src/southbridge/intel/i82801xx/i82801xx_early_smbus.c')
| -rw-r--r-- | src/southbridge/intel/i82801xx/i82801xx_early_smbus.c | 45 |
1 files changed, 26 insertions, 19 deletions
diff --git a/src/southbridge/intel/i82801xx/i82801xx_early_smbus.c b/src/southbridge/intel/i82801xx/i82801xx_early_smbus.c index 070cc22a00..214ca0834e 100644 --- a/src/southbridge/intel/i82801xx/i82801xx_early_smbus.c +++ b/src/southbridge/intel/i82801xx/i82801xx_early_smbus.c @@ -28,31 +28,36 @@ static void enable_smbus(void) { device_t dev; uint16_t device_id; - - /* Set the SMBus device staticly */ + + /* Set the SMBus device staticly. */ dev = PCI_DEV(0x0, 0x1f, 0x3); - - /* Check to make sure we've got the right device */ + + /* Check to make sure we've got the right device. */ device_id = pci_read_config16(dev, 0x2); - - /* Clear bits 7-4, since those are the only bits that vary between models */ + + /* Clear bits 7-4 (the only bits that vary between models). */ device_id &= 0xff0f; - - if(device_id != 0x2403) - { + + if (device_id != 0x2403) { die("Device not found, Corey probably screwed up!"); } - - /* Set SMBus I/O base */ - pci_write_config32(dev, SMB_BASE, SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO); - /* Set SMBus enable */ + + /* Set SMBus I/O base. */ + pci_write_config32(dev, SMB_BASE, + SMBUS_IO_BASE | PCI_BASE_ADDRESS_SPACE_IO); + + /* Set SMBus enable. */ pci_write_config8(dev, HOSTC, HST_EN); - /* Set SMBus I/O space enable */ + + /* Set SMBus I/O space enable. */ pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_IO); - /* Disable interrupt generation */ + + /* Disable interrupt generation. */ outb(0, SMBUS_IO_BASE + SMBHSTCTL); - /* Clear any lingering errors, so transactions can run */ + + /* Clear any lingering errors, so transactions can run. */ outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); + print_debug("SMBus controller enabled\r\n"); } @@ -61,14 +66,16 @@ static inline int smbus_read_byte(unsigned device, unsigned address) return do_smbus_read_byte(device, address); } -static void smbus_write_byte(unsigned device, unsigned address, unsigned char val) +static void smbus_write_byte(unsigned device, unsigned address, + unsigned char val) { print_err("Unimplemented smbus_write_byte() called\r\n"); return; } -static inline int smbus_write_block(unsigned device, unsigned length, unsigned cmd, - unsigned data1, unsigned data2) +static inline int smbus_write_block(unsigned device, unsigned length, + unsigned cmd, unsigned data1, + unsigned data2) { return do_smbus_write_block(device, length, cmd, data1, data2); } |