diff options
Diffstat (limited to 'src/southbridge/amd/cs5536/cs5536_smbus2.h')
| -rw-r--r-- | src/southbridge/amd/cs5536/cs5536_smbus2.h | 64 |
1 files changed, 33 insertions, 31 deletions
diff --git a/src/southbridge/amd/cs5536/cs5536_smbus2.h b/src/southbridge/amd/cs5536/cs5536_smbus2.h index ad92f7e051..e7d46d6313 100644 --- a/src/southbridge/amd/cs5536/cs5536_smbus2.h +++ b/src/southbridge/amd/cs5536/cs5536_smbus2.h @@ -62,13 +62,13 @@ #define SMBUS_TIMEOUT (100*1000*10) #define SMBUS_STATUS_MASK 0xfbff - static void smbus_delay(void) { inb(0x80); } -static int smbus_wait(unsigned smbus_io_base) { +static int smbus_wait(unsigned smbus_io_base) +{ unsigned long loops = SMBUS_TIMEOUT; unsigned char val; @@ -81,13 +81,14 @@ static int smbus_wait(unsigned smbus_io_base) { printk_debug("SMBUS WAIT ERROR %x\n", val); return SMBUS_ERROR; } - } while(--loops); + } while (--loops); outb(0, smbus_io_base + SMB_STS); return loops ? 0 : SMBUS_WAIT_UNTIL_READY_TIMEOUT; } -static int smbus_write(unsigned smbus_io_base, unsigned char byte) { +static int smbus_write(unsigned smbus_io_base, unsigned char byte) +{ outb(byte, smbus_io_base + SMB_SDA); return smbus_wait(smbus_io_base); @@ -122,17 +123,17 @@ static int smbus_check_stop_condition(unsigned smbus_io_base) if ((val & SMB_CTRL1_STOP) == 0) { break; } - } while(--loops); - return loops?0:SMBUS_WAIT_UNTIL_READY_TIMEOUT; + } while (--loops); + return loops ? 0 : SMBUS_WAIT_UNTIL_READY_TIMEOUT; /* Make sure everything is cleared and ready to go */ val = inb(smbus_io_base + SMB_CTRL1); outb(val & ~(SMB_CTRL1_STASTRE | SMB_CTRL1_NMINTE), - smbus_io_base + SMB_CTRL1); + smbus_io_base + SMB_CTRL1); outb(SMB_STS_BER | SMB_STS_NEGACK | SMB_STS_STASTR, - smbus_io_base + SMB_STS); + smbus_io_base + SMB_STS); val = inb(smbus_io_base + SMB_CTRL_STS); outb(val | SMB_CSTS_BB, smbus_io_base + SMB_CTRL_STS); @@ -159,7 +160,8 @@ static int smbus_ack(unsigned smbus_io_base, int state) return 0; } -static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device) +static int smbus_send_slave_address(unsigned smbus_io_base, + unsigned char device) { unsigned char val; @@ -168,8 +170,7 @@ static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device /* check for bus conflict and NACK */ val = inb(smbus_io_base + SMB_STS); - if (((val & SMB_STS_BER) != 0) || - ((val & SMB_STS_NEGACK) != 0)) { + if (((val & SMB_STS_BER) != 0) || ((val & SMB_STS_NEGACK) != 0)) { printk_debug("SEND SLAVE ERROR (%x)\n", val); return SMBUS_ERROR; } @@ -178,22 +179,21 @@ static int smbus_send_slave_address(unsigned smbus_io_base, unsigned char device static int smbus_send_command(unsigned smbus_io_base, unsigned char command) { - unsigned char val; + unsigned char val; /* 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)) + if (((val & SMB_STS_BER) != 0) || ((val & SMB_STS_NEGACK) != 0)) return SMBUS_ERROR; return smbus_wait(smbus_io_base); } static void _doread(unsigned smbus_io_base, unsigned char device, - unsigned char address, unsigned char *data, int count) + unsigned char address, unsigned char *data, int count) { int ret; int index = 0; @@ -207,7 +207,7 @@ static void _doread(unsigned smbus_io_base, unsigned char device, if ((ret = smbus_start_condition(smbus_io_base))) goto err; - index++; /* 2 */ + index++; /* 2 */ if ((ret = smbus_send_slave_address(smbus_io_base, device))) goto err; @@ -226,7 +226,7 @@ static void _doread(unsigned smbus_io_base, unsigned char device, if ((ret = smbus_send_slave_address(smbus_io_base, device | 0x01))) goto err; - while(count) { + while (count) { /* Set the ACK if this is the next to last byte */ smbus_ack(smbus_io_base, (count == 2) ? 1 : 0); @@ -249,12 +249,12 @@ static void _doread(unsigned smbus_io_base, unsigned char device, return; - err: + err: printk_debug("SMBUS READ ERROR (%d): %d\n", index, ret); } static unsigned char do_smbus_read_byte(unsigned smbus_io_base, - unsigned char device, + unsigned char device, unsigned char address) { unsigned char val = 0; @@ -263,16 +263,18 @@ static unsigned char do_smbus_read_byte(unsigned smbus_io_base, } static unsigned short do_smbus_read_word(unsigned smbus_io_base, - unsigned char device, unsigned char address) + unsigned char device, + unsigned char address) { unsigned short val = 0; - _doread(smbus_io_base, device, address, (unsigned char *) &val, - sizeof(val)); + _doread(smbus_io_base, device, address, (unsigned char *)&val, + sizeof(val)); return val; } static int _dowrite(unsigned smbus_io_base, unsigned char device, - unsigned char address, unsigned char *data, int count) { + unsigned char address, unsigned char *data, int count) +{ int ret; @@ -288,7 +290,7 @@ static int _dowrite(unsigned smbus_io_base, unsigned char device, if ((ret = smbus_send_command(smbus_io_base, address))) goto err; - while(count) { + while (count) { if ((ret = smbus_write(smbus_io_base, *data++))) goto err; count--; @@ -297,21 +299,21 @@ static int _dowrite(unsigned smbus_io_base, unsigned char device, smbus_stop_condition(smbus_io_base); return 0; - err: + err: printk_debug("SMBUS WRITE ERROR: %d\n", ret); return -1; } - static int do_smbus_write_byte(unsigned smbus_io_base, unsigned char device, - unsigned char address, unsigned char data) + unsigned char address, unsigned char data) { return _dowrite(smbus_io_base, device, address, - (unsigned char *) &data, 1); + (unsigned char *)&data, 1); } -static int do_smbus_write_word(unsigned smbus_io_base, unsigned char device, unsigned char address, - unsigned short data) +static int do_smbus_write_word(unsigned smbus_io_base, unsigned char device, + unsigned char address, unsigned short data) { - return _dowrite(smbus_io_base, device ,address, (unsigned char *) &data, 2); + return _dowrite(smbus_io_base, device, address, (unsigned char *)&data, + 2); } |