diff options
Diffstat (limited to 'src/southbridge/amd/cs5535/cs5535_smbus.h')
-rw-r--r-- | src/southbridge/amd/cs5535/cs5535_smbus.h | 90 |
1 files changed, 49 insertions, 41 deletions
diff --git a/src/southbridge/amd/cs5535/cs5535_smbus.h b/src/southbridge/amd/cs5535/cs5535_smbus.h index 3a2e4928bf..2504f5dbef 100644 --- a/src/southbridge/amd/cs5535/cs5535_smbus.h +++ b/src/southbridge/amd/cs5535/cs5535_smbus.h @@ -3,46 +3,49 @@ #define SMBUS_WAIT_UNTIL_READY_TIMEOUT -2 #define SMBUS_WAIT_UNTIL_DONE_TIMEOUT -3 -enum smb_native_registers { - SMB_SDA = 0x00, SMB_STS = 0x01, SMB_CTRL_STS = 0x02, - SMB_CTRL1 = 0x03, SMB_ADD = 0x04, SMB_CTRL2 = 0x05, - SMB_CTRL3 = 0x06 -}; - -enum smb_sts_bits { - SMB_STS_SLVSTP = (0x01 << 7), SMB_STS_SDAST = (0x01 << 6), - SMB_STS_BER = (0x01 << 5), SMB_STS_NEGACK = (0x01 << 4), - SMB_STS_STASTR = (0x01 << 3), SMB_STS_NMATCH = (0x01 << 2), - SMB_STS_MASTER = (0x01 << 1), SMB_STS_XMIT = (0x01 << 0) -}; - -enum smb_ctrl_sts_bits { - SMB_CSTS_TGSCL = (0x01 << 5), SMB_CSTS_TSDA = (0x01 << 4), - SMB_CSTS_GCMTCH = (0x01 << 3), SMB_CSTS_MATCH = (0x01 << 2), - SMB_CSTS_BB = (0x01 << 1), SMB_CSTS_BUSY = (0x01 << 0) -}; - -enum smb_ctrl1_bits { - SMB_CTRL1_STASTRE = (0x01 << 7), SMB_CTRL1_NMINTE = (0x01 << 6), - SMB_CTRL1_GCMEN = (0x01 << 5), SMB_CTRL1_ACK = (0x01 << 4), - SMB_CTRL1_RSVD = (0x01 << 3), SMB_CTRL1_INTEN = (0x01 << 2), - SMB_CTRL1_STOP = (0x01 << 1), SMB_CTRL1_START = (0x01 << 0) -}; - -enum smb_add_bits { - SMB_ADD_SAEN = (0x01 << 7) -}; - -enum smb_ctrl2_bits { - SMB_CTRL2_ENABLE = 0x01, -}; +#define SMB_SDA 0x00 +#define SMB_STS 0x01 +#define SMB_CTRL_STS 0x02 +#define SMB_CTRL1 0x03 +#define SMB_ADD 0x04 +#define SMB_CTRL2 0x05 +#define SMB_CTRL3 0x06 + +#define SMB_STS_SLVSTP (0x01 << 7) +#define SMB_STS_SDAST (0x01 << 6) +#define SMB_STS_BER (0x01 << 5) +#define SMB_STS_NEGACK (0x01 << 4) +#define SMB_STS_STASTR (0x01 << 3) +#define SMB_STS_NMATCH (0x01 << 2) +#define SMB_STS_MASTER (0x01 << 1) +#define SMB_STS_XMIT (0x01 << 0) + +#define SMB_CSTS_TGSCL (0x01 << 5) +#define SMB_CSTS_TSDA (0x01 << 4) +#define SMB_CSTS_GCMTCH (0x01 << 3) +#define SMB_CSTS_MATCH (0x01 << 2) +#define SMB_CSTS_BB (0x01 << 1) +#define SMB_CSTS_BUSY (0x01 << 0) + +#define SMB_CTRL1_STASTRE (0x01 << 7) +#define SMB_CTRL1_NMINTE (0x01 << 6) +#define SMB_CTRL1_GCMEN (0x01 << 5) +#define SMB_CTRL1_ACK (0x01 << 4) +#define SMB_CTRL1_RSVD (0x01 << 3) +#define SMB_CTRL1_INTEN (0x01 << 2) +#define SMB_CTRL1_STOP (0x01 << 1) +#define SMB_CTRL1_START (0x01 << 0) + +#define SMB_ADD_SAEN (0x01 << 7) + +#define SMB_CTRL2_ENABLE 0x01 #define SMBUS_TIMEOUT (100*1000*10) #define SMBUS_STATUS_MASK 0xfbff -static inline void smbus_delay(void) +static void smbus_delay(void) { - outb(0x80, 0x80); + outb(0x80, 0x80); } /* generate a smbus start condition */ @@ -124,19 +127,24 @@ static int smbus_send_command(unsigned smbus_io_base, unsigned char command) return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; } -static int do_smbus_read_byte(unsigned smbus_io_base, unsigned char device, unsigned char address) +static unsigned char do_smbus_read_byte(unsigned smbus_io_base, unsigned char device, unsigned char address) { unsigned char val; - smbus_start_condition(smbus_io_base); + if (smbus_start_condition(smbus_io_base) < 0) + print_debug("smbus error 1"); - smbus_send_slave_address(smbus_io_base, device); + if (smbus_send_slave_address(smbus_io_base, device) < 0) + print_debug("smbus error 2"); - smbus_send_command(smbus_io_base, address); + if (smbus_send_command(smbus_io_base, address) < 0) + print_debug("smbus error 3"); - smbus_start_condition(smbus_io_base); + if (smbus_start_condition(smbus_io_base) < 0) + print_debug("smbus error 4"); - smbus_send_slave_address(smbus_io_base, device | 0x01); + if (smbus_send_slave_address(smbus_io_base, device | 0x01)) + print_debug("smbus error 5"); val = inb(smbus_io_base + SMB_CTRL1); outb(val | SMB_CTRL1_ACK, smbus_io_base + SMB_CTRL1); |