diff options
Diffstat (limited to 'src/southbridge/amd/cs5535/cs5535_smbus.h')
-rw-r--r-- | src/southbridge/amd/cs5535/cs5535_smbus.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/src/southbridge/amd/cs5535/cs5535_smbus.h b/src/southbridge/amd/cs5535/cs5535_smbus.h index 799e226f5e..db35f6ee7b 100644 --- a/src/southbridge/amd/cs5535/cs5535_smbus.h +++ b/src/southbridge/amd/cs5535/cs5535_smbus.h @@ -44,137 +44,3 @@ #define SMBUS_STATUS_MASK 0xfbff #define SMBUS_IO_BASE 0x6000 - -static void smbus_delay(void) -{ - outb(0x80, 0x80); -} - -/* generate a smbus start condition */ -static int smbus_start_condition(unsigned smbus_io_base) -{ - unsigned char val; - unsigned long loops; - loops = SMBUS_TIMEOUT; - - /* issue a START condition */ - val = inb(smbus_io_base + SMB_CTRL1); - outb(val | SMB_CTRL1_START, smbus_io_base + SMB_CTRL1); - - /* check for bus conflict */ - val = inb(smbus_io_base + SMB_STS); - if ((val & SMB_STS_BER) != 0) - return SMBUS_ERROR; - - /* check for SDA status */ - do { - smbus_delay(); - val = inw(smbus_io_base + SMB_STS); - if ((val & SMB_STS_SDAST) != 0) { - break; - } - } while(--loops); - return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; -} - -static int smbus_check_stop_condition(unsigned smbus_io_base) -{ - unsigned char val; - unsigned long loops; - loops = SMBUS_TIMEOUT; - /* check for SDA status */ - do { - smbus_delay(); - val = inw(smbus_io_base + SMB_CTRL1); - if ((val & SMB_CTRL1_STOP) == 0) { - break; - } - } while(--loops); - return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; -} - -static int smbus_stop_condition(unsigned smbus_io_base) -{ - unsigned char val; - val = inb(smbus_io_base + SMB_CTRL1); - outb(SMB_CTRL1_STOP, smbus_io_base + SMB_CTRL1); -} - -static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device) -{ - unsigned char val; - unsigned long loops; - loops = SMBUS_TIMEOUT; - - /* send the slave address */ - outb(device, smbus_io_base + SMB_SDA); - - /* check for bus conflict and NACK */ - val = inb(smbus_io_base + SMB_STS); - if (((val & SMB_STS_BER) != 0) || - ((val & SMB_STS_NEGACK) != 0)) - return SMBUS_ERROR; - - /* check for SDA status */ - do { - smbus_delay(); - val = inw(smbus_io_base + SMB_STS); - if ((val & SMB_STS_SDAST) != 0) { - break; - } - } while(--loops); - return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; -} - -static int smbus_send_command(unsigned smbus_io_base, unsigned char command) -{ - unsigned char val; - unsigned long loops; - loops = SMBUS_TIMEOUT; - - /* send the command */ - outb(command, smbus_io_base + SMB_SDA); - - /* check for bus conflict and NACK */ - val = inb(smbus_io_base + SMB_STS); - if (((val & SMB_STS_BER) != 0) || - ((val & SMB_STS_NEGACK) != 0)) - return SMBUS_ERROR; - - /* check for SDA status */ - do { - smbus_delay(); - val = inw(smbus_io_base + SMB_STS); - if ((val & SMB_STS_SDAST) != 0) { - break; - } - } while(--loops); - return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; -} - -static unsigned char do_smbus_read_byte(unsigned smbus_io_base, unsigned char device, unsigned char address) -{ - unsigned char val, val1; - - smbus_check_stop_condition(smbus_io_base); - - smbus_start_condition(smbus_io_base); - - smbus_send_slave_address(smbus_io_base, device); - - smbus_send_command(smbus_io_base, address); - - smbus_start_condition(smbus_io_base); - - smbus_send_slave_address(smbus_io_base, device | 0x01); - - /* send NACK to slave */ - val = inb(smbus_io_base + SMB_CTRL1); - outb(val | SMB_CTRL1_ACK, smbus_io_base + SMB_CTRL1); - - val = inb(smbus_io_base + SMB_SDA); - - //smbus_stop_condition(smbus_io_base); - - return val; -} |