diff options
Diffstat (limited to 'drivers/staging/sm750fb/ddk750_swi2c.c')
-rw-r--r-- | drivers/staging/sm750fb/ddk750_swi2c.c | 116 |
1 files changed, 58 insertions, 58 deletions
diff --git a/drivers/staging/sm750fb/ddk750_swi2c.c b/drivers/staging/sm750fb/ddk750_swi2c.c index 6a10ae3..faaf858 100644 --- a/drivers/staging/sm750fb/ddk750_swi2c.c +++ b/drivers/staging/sm750fb/ddk750_swi2c.c @@ -82,7 +82,7 @@ static unsigned long g_i2cDataGPIODataDirReg = GPIO_DATA_DIRECTION; /* * This function puts a delay between command */ -static void swI2CWait(void) +static void sw_i2c_wait(void) { /* find a bug: * peekIO method works well before suspend/resume @@ -119,7 +119,7 @@ static void swI2CWait(void) * signal because the i2c will fail when other device try to drive the * signal due to SM50x will drive the signal to always high. */ -static void swI2CSCL(unsigned char value) +static void sw_i2c_scl(unsigned char value) { unsigned long ulGPIOData; unsigned long ulGPIODirection; @@ -153,7 +153,7 @@ static void swI2CSCL(unsigned char value) * signal because the i2c will fail when other device try to drive the * signal due to SM50x will drive the signal to always high. */ -static void swI2CSDA(unsigned char value) +static void sw_i2c_sda(unsigned char value) { unsigned long ulGPIOData; unsigned long ulGPIODirection; @@ -181,7 +181,7 @@ static void swI2CSDA(unsigned char value) * Return Value: * The SDA data bit sent by the Slave */ -static unsigned char swI2CReadSDA(void) +static unsigned char sw_i2c_read_sda(void) { unsigned long ulGPIODirection; unsigned long ulGPIOData; @@ -204,7 +204,7 @@ static unsigned char swI2CReadSDA(void) /* * This function sends ACK signal */ -static void swI2CAck(void) +static void sw_i2c_ack(void) { return; /* Single byte read is ok without it. */ } @@ -212,23 +212,23 @@ static void swI2CAck(void) /* * This function sends the start command to the slave device */ -static void swI2CStart(void) +static void sw_i2c_start(void) { /* Start I2C */ - swI2CSDA(1); - swI2CSCL(1); - swI2CSDA(0); + sw_i2c_sda(1); + sw_i2c_scl(1); + sw_i2c_sda(0); } /* * This function sends the stop command to the slave device */ -static void swI2CStop(void) +static void sw_i2c_stop(void) { /* Stop the I2C */ - swI2CSCL(1); - swI2CSDA(0); - swI2CSDA(1); + sw_i2c_scl(1); + sw_i2c_sda(0); + sw_i2c_sda(1); } /* @@ -241,7 +241,7 @@ static void swI2CStop(void) * 0 - Success * -1 - Fail to write byte */ -static long swI2CWriteByte(unsigned char data) +static long sw_i2c_write_byte(unsigned char data) { unsigned char value = data; int i; @@ -249,47 +249,47 @@ static long swI2CWriteByte(unsigned char data) /* Sending the data bit by bit */ for (i = 0; i < 8; i++) { /* Set SCL to low */ - swI2CSCL(0); + sw_i2c_scl(0); /* Send data bit */ if ((value & 0x80) != 0) - swI2CSDA(1); + sw_i2c_sda(1); else - swI2CSDA(0); + sw_i2c_sda(0); - swI2CWait(); + sw_i2c_wait(); /* Toggle clk line to one */ - swI2CSCL(1); - swI2CWait(); + sw_i2c_scl(1); + sw_i2c_wait(); /* Shift byte to be sent */ value = value << 1; } /* Set the SCL Low and SDA High (prepare to get input) */ - swI2CSCL(0); - swI2CSDA(1); + sw_i2c_scl(0); + sw_i2c_sda(1); /* Set the SCL High for ack */ - swI2CWait(); - swI2CSCL(1); - swI2CWait(); + sw_i2c_wait(); + sw_i2c_scl(1); + sw_i2c_wait(); /* Read SDA, until SDA==0 */ for (i = 0; i < 0xff; i++) { - if (!swI2CReadSDA()) + if (!sw_i2c_read_sda()) break; - swI2CSCL(0); - swI2CWait(); - swI2CSCL(1); - swI2CWait(); + sw_i2c_scl(0); + sw_i2c_wait(); + sw_i2c_scl(1); + sw_i2c_wait(); } /* Set the SCL Low and SDA High */ - swI2CSCL(0); - swI2CSDA(1); + sw_i2c_scl(0); + sw_i2c_sda(1); if (i < 0xff) return 0; @@ -307,31 +307,31 @@ static long swI2CWriteByte(unsigned char data) * Return Value: * One byte data read from the Slave device */ -static unsigned char swI2CReadByte(unsigned char ack) +static unsigned char sw_i2c_read_byte(unsigned char ack) { int i; unsigned char data = 0; for (i = 7; i >= 0; i--) { /* Set the SCL to Low and SDA to High (Input) */ - swI2CSCL(0); - swI2CSDA(1); - swI2CWait(); + sw_i2c_scl(0); + sw_i2c_sda(1); + sw_i2c_wait(); /* Set the SCL High */ - swI2CSCL(1); - swI2CWait(); + sw_i2c_scl(1); + sw_i2c_wait(); /* Read data bits from SDA */ - data |= (swI2CReadSDA() << i); + data |= (sw_i2c_read_sda() << i); } if (ack) - swI2CAck(); + sw_i2c_ack(); /* Set the SCL Low and SDA High */ - swI2CSCL(0); - swI2CSDA(1); + sw_i2c_scl(0); + sw_i2c_sda(1); return data; } @@ -347,7 +347,7 @@ static unsigned char swI2CReadByte(unsigned char ack) * -1 - Fail to initialize the i2c * 0 - Success */ -static long swI2CInit_SM750LE(unsigned char i2cClkGPIO, +static long sm750le_i2c_init(unsigned char i2cClkGPIO, unsigned char i2cDataGPIO) { int i; @@ -370,7 +370,7 @@ static long swI2CInit_SM750LE(unsigned char i2cClkGPIO, /* Clear the i2c lines. */ for (i = 0; i < 9; i++) - swI2CStop(); + sw_i2c_stop(); return 0; } @@ -398,7 +398,7 @@ long sm750_sw_i2c_init( return -1; if (getChipType() == SM750LE) - return swI2CInit_SM750LE(i2cClkGPIO, i2cDataGPIO); + return sm750le_i2c_init(i2cClkGPIO, i2cDataGPIO); /* Initialize the GPIO pin for the i2c Clock Register */ g_i2cClkGPIOMuxReg = GPIO_MUX; @@ -427,7 +427,7 @@ long sm750_sw_i2c_init( /* Clear the i2c lines. */ for (i = 0; i < 9; i++) - swI2CStop(); + sw_i2c_stop(); return 0; } @@ -451,21 +451,21 @@ unsigned char sm750_sw_i2c_read_reg( unsigned char data; /* Send the Start signal */ - swI2CStart(); + sw_i2c_start(); /* Send the device address */ - swI2CWriteByte(deviceAddress); + sw_i2c_write_byte(deviceAddress); /* Send the register index */ - swI2CWriteByte(registerIndex); + sw_i2c_write_byte(registerIndex); /* Get the bus again and get the data from the device read address */ - swI2CStart(); - swI2CWriteByte(deviceAddress + 1); - data = swI2CReadByte(1); + sw_i2c_start(); + sw_i2c_write_byte(deviceAddress + 1); + data = sw_i2c_read_byte(1); /* Stop swI2C and release the bus */ - swI2CStop(); + sw_i2c_stop(); return data; } @@ -492,19 +492,19 @@ long sm750_sw_i2c_write_reg( long returnValue = 0; /* Send the Start signal */ - swI2CStart(); + sw_i2c_start(); /* Send the device address and read the data. All should return success in order for the writing processed to be successful */ - if ((swI2CWriteByte(deviceAddress) != 0) || - (swI2CWriteByte(registerIndex) != 0) || - (swI2CWriteByte(data) != 0)) { + if ((sw_i2c_write_byte(deviceAddress) != 0) || + (sw_i2c_write_byte(registerIndex) != 0) || + (sw_i2c_write_byte(data) != 0)) { returnValue = -1; } /* Stop i2c and release the bus */ - swI2CStop(); + sw_i2c_stop(); return returnValue; } |