*/
while(peekIO(0x3ce, 0x61) & 0x10);
#else
- int i, Temp;
+ int i, Temp;
- for(i=0; i<600; i++)
- {
- Temp = i;
- Temp += i;
- }
+ for(i=0; i<600; i++)
+ {
+ Temp = i;
+ Temp += i;
+ }
#endif
}
*/
void swI2CSCL(unsigned char value)
{
- unsigned long ulGPIOData;
- unsigned long ulGPIODirection;
-
- ulGPIODirection = PEEK32(g_i2cClkGPIODataDirReg);
- if (value) /* High */
- {
- /* Set direction as input. This will automatically pull the signal up. */
- ulGPIODirection &= ~(1 << g_i2cClockGPIO);
- POKE32(g_i2cClkGPIODataDirReg, ulGPIODirection);
- }
- else /* Low */
- {
- /* Set the signal down */
- ulGPIOData = PEEK32(g_i2cClkGPIODataReg);
- ulGPIOData &= ~(1 << g_i2cClockGPIO);
- POKE32(g_i2cClkGPIODataReg, ulGPIOData);
-
- /* Set direction as output */
- ulGPIODirection |= (1 << g_i2cClockGPIO);
- POKE32(g_i2cClkGPIODataDirReg, ulGPIODirection);
- }
+ unsigned long ulGPIOData;
+ unsigned long ulGPIODirection;
+
+ ulGPIODirection = PEEK32(g_i2cClkGPIODataDirReg);
+ if (value) /* High */
+ {
+ /* Set direction as input. This will automatically pull the signal up. */
+ ulGPIODirection &= ~(1 << g_i2cClockGPIO);
+ POKE32(g_i2cClkGPIODataDirReg, ulGPIODirection);
+ }
+ else /* Low */
+ {
+ /* Set the signal down */
+ ulGPIOData = PEEK32(g_i2cClkGPIODataReg);
+ ulGPIOData &= ~(1 << g_i2cClockGPIO);
+ POKE32(g_i2cClkGPIODataReg, ulGPIOData);
+
+ /* Set direction as output */
+ ulGPIODirection |= (1 << g_i2cClockGPIO);
+ POKE32(g_i2cClkGPIODataDirReg, ulGPIODirection);
+ }
}
/*
*/
void swI2CSDA(unsigned char value)
{
- unsigned long ulGPIOData;
- unsigned long ulGPIODirection;
-
- ulGPIODirection = PEEK32(g_i2cDataGPIODataDirReg);
- if (value) /* High */
- {
- /* Set direction as input. This will automatically pull the signal up. */
- ulGPIODirection &= ~(1 << g_i2cDataGPIO);
- POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
- }
- else /* Low */
- {
- /* Set the signal down */
- ulGPIOData = PEEK32(g_i2cDataGPIODataReg);
- ulGPIOData &= ~(1 << g_i2cDataGPIO);
- POKE32(g_i2cDataGPIODataReg, ulGPIOData);
-
- /* Set direction as output */
- ulGPIODirection |= (1 << g_i2cDataGPIO);
- POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
- }
+ unsigned long ulGPIOData;
+ unsigned long ulGPIODirection;
+
+ ulGPIODirection = PEEK32(g_i2cDataGPIODataDirReg);
+ if (value) /* High */
+ {
+ /* Set direction as input. This will automatically pull the signal up. */
+ ulGPIODirection &= ~(1 << g_i2cDataGPIO);
+ POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
+ }
+ else /* Low */
+ {
+ /* Set the signal down */
+ ulGPIOData = PEEK32(g_i2cDataGPIODataReg);
+ ulGPIOData &= ~(1 << g_i2cDataGPIO);
+ POKE32(g_i2cDataGPIODataReg, ulGPIOData);
+
+ /* Set direction as output */
+ ulGPIODirection |= (1 << g_i2cDataGPIO);
+ POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
+ }
}
/*
*/
static unsigned char swI2CReadSDA(void)
{
- unsigned long ulGPIODirection;
- unsigned long ulGPIOData;
-
- /* Make sure that the direction is input (High) */
- ulGPIODirection = PEEK32(g_i2cDataGPIODataDirReg);
- if ((ulGPIODirection & (1 << g_i2cDataGPIO)) != (~(1 << g_i2cDataGPIO)))
- {
- ulGPIODirection &= ~(1 << g_i2cDataGPIO);
- POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
- }
-
- /* Now read the SDA line */
- ulGPIOData = PEEK32(g_i2cDataGPIODataReg);
- if (ulGPIOData & (1 << g_i2cDataGPIO))
- return 1;
- else
- return 0;
+ unsigned long ulGPIODirection;
+ unsigned long ulGPIOData;
+
+ /* Make sure that the direction is input (High) */
+ ulGPIODirection = PEEK32(g_i2cDataGPIODataDirReg);
+ if ((ulGPIODirection & (1 << g_i2cDataGPIO)) != (~(1 << g_i2cDataGPIO)))
+ {
+ ulGPIODirection &= ~(1 << g_i2cDataGPIO);
+ POKE32(g_i2cDataGPIODataDirReg, ulGPIODirection);
+ }
+
+ /* Now read the SDA line */
+ ulGPIOData = PEEK32(g_i2cDataGPIODataReg);
+ if (ulGPIOData & (1 << g_i2cDataGPIO))
+ return 1;
+ else
+ return 0;
}
/*
*/
static void swI2CAck(void)
{
- return; /* Single byte read is ok without it. */
+ return; /* Single byte read is ok without it. */
}
/*
*/
static void swI2CStart(void)
{
- /* Start I2C */
- swI2CSDA(1);
- swI2CSCL(1);
- swI2CSDA(0);
+ /* Start I2C */
+ swI2CSDA(1);
+ swI2CSCL(1);
+ swI2CSDA(0);
}
/*
*/
static void swI2CStop(void)
{
- /* Stop the I2C */
- swI2CSCL(1);
- swI2CSDA(0);
- swI2CSDA(1);
+ /* Stop the I2C */
+ swI2CSCL(1);
+ swI2CSDA(0);
+ swI2CSDA(1);
}
/*
*/
static long swI2CWriteByte(unsigned char data)
{
- unsigned char value = data;
- int i;
-
- /* Sending the data bit by bit */
- for (i=0; i<8; i++)
- {
- /* Set SCL to low */
- swI2CSCL(0);
-
- /* Send data bit */
- if ((value & 0x80) != 0)
- swI2CSDA(1);
- else
- swI2CSDA(0);
-
- swI2CWait();
-
- /* Toggle clk line to one */
- swI2CSCL(1);
- swI2CWait();
-
- /* Shift byte to be sent */
- value = value << 1;
- }
-
- /* Set the SCL Low and SDA High (prepare to get input) */
- swI2CSCL(0);
- swI2CSDA(1);
-
- /* Set the SCL High for ack */
- swI2CWait();
- swI2CSCL(1);
- swI2CWait();
-
- /* Read SDA, until SDA==0 */
- for(i=0; i<0xff; i++)
- {
- if (!swI2CReadSDA())
- break;
-
- swI2CSCL(0);
- swI2CWait();
- swI2CSCL(1);
- swI2CWait();
- }
-
- /* Set the SCL Low and SDA High */
- swI2CSCL(0);
- swI2CSDA(1);
-
- if (i<0xff)
- return 0;
- else
- return -1;
+ unsigned char value = data;
+ int i;
+
+ /* Sending the data bit by bit */
+ for (i=0; i<8; i++)
+ {
+ /* Set SCL to low */
+ swI2CSCL(0);
+
+ /* Send data bit */
+ if ((value & 0x80) != 0)
+ swI2CSDA(1);
+ else
+ swI2CSDA(0);
+
+ swI2CWait();
+
+ /* Toggle clk line to one */
+ swI2CSCL(1);
+ swI2CWait();
+
+ /* Shift byte to be sent */
+ value = value << 1;
+ }
+
+ /* Set the SCL Low and SDA High (prepare to get input) */
+ swI2CSCL(0);
+ swI2CSDA(1);
+
+ /* Set the SCL High for ack */
+ swI2CWait();
+ swI2CSCL(1);
+ swI2CWait();
+
+ /* Read SDA, until SDA==0 */
+ for(i=0; i<0xff; i++)
+ {
+ if (!swI2CReadSDA())
+ break;
+
+ swI2CSCL(0);
+ swI2CWait();
+ swI2CSCL(1);
+ swI2CWait();
+ }
+
+ /* Set the SCL Low and SDA High */
+ swI2CSCL(0);
+ swI2CSDA(1);
+
+ if (i<0xff)
+ return 0;
+ else
+ return -1;
}
/*
*/
static unsigned char swI2CReadByte(unsigned char ack)
{
- int i;
- unsigned char data = 0;
+ 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();
+ for(i=7; i>=0; i--)
+ {
+ /* Set the SCL to Low and SDA to High (Input) */
+ swI2CSCL(0);
+ swI2CSDA(1);
+ swI2CWait();
- /* Set the SCL High */
- swI2CSCL(1);
- swI2CWait();
+ /* Set the SCL High */
+ swI2CSCL(1);
+ swI2CWait();
- /* Read data bits from SDA */
- data |= (swI2CReadSDA() << i);
- }
+ /* Read data bits from SDA */
+ data |= (swI2CReadSDA() << i);
+ }
- if (ack)
- swI2CAck();
+ if (ack)
+ swI2CAck();
- /* Set the SCL Low and SDA High */
- swI2CSCL(0);
- swI2CSDA(1);
+ /* Set the SCL Low and SDA High */
+ swI2CSCL(0);
+ swI2CSDA(1);
- return data;
+ return data;
}
/*
static long swI2CInit_SM750LE(unsigned char i2cClkGPIO,
unsigned char i2cDataGPIO)
{
- int i;
+ int i;
- /* Initialize the GPIO pin for the i2c Clock Register */
- g_i2cClkGPIODataReg = GPIO_DATA_SM750LE;
- g_i2cClkGPIODataDirReg = GPIO_DATA_DIRECTION_SM750LE;
+ /* Initialize the GPIO pin for the i2c Clock Register */
+ g_i2cClkGPIODataReg = GPIO_DATA_SM750LE;
+ g_i2cClkGPIODataDirReg = GPIO_DATA_DIRECTION_SM750LE;
- /* Initialize the Clock GPIO Offset */
- g_i2cClockGPIO = i2cClkGPIO;
+ /* Initialize the Clock GPIO Offset */
+ g_i2cClockGPIO = i2cClkGPIO;
- /* Initialize the GPIO pin for the i2c Data Register */
- g_i2cDataGPIODataReg = GPIO_DATA_SM750LE;
- g_i2cDataGPIODataDirReg = GPIO_DATA_DIRECTION_SM750LE;
+ /* Initialize the GPIO pin for the i2c Data Register */
+ g_i2cDataGPIODataReg = GPIO_DATA_SM750LE;
+ g_i2cDataGPIODataDirReg = GPIO_DATA_DIRECTION_SM750LE;
- /* Initialize the Data GPIO Offset */
- g_i2cDataGPIO = i2cDataGPIO;
+ /* Initialize the Data GPIO Offset */
+ g_i2cDataGPIO = i2cDataGPIO;
- /* Note that SM750LE don't have GPIO MUX and power is always on */
+ /* Note that SM750LE don't have GPIO MUX and power is always on */
- /* Clear the i2c lines. */
- for(i=0; i<9; i++)
- swI2CStop();
+ /* Clear the i2c lines. */
+ for(i=0; i<9; i++)
+ swI2CStop();
- return 0;
+ return 0;
}
/*
* 0 - Success
*/
long swI2CInit(
- unsigned char i2cClkGPIO,
- unsigned char i2cDataGPIO
+ unsigned char i2cClkGPIO,
+ unsigned char i2cDataGPIO
)
{
- int i;
+ int i;
- /* Return 0 if the GPIO pins to be used is out of range. The range is only from [0..63] */
- if ((i2cClkGPIO > 31) || (i2cDataGPIO > 31))
- return -1;
+ /* Return 0 if the GPIO pins to be used is out of range. The range is only from [0..63] */
+ if ((i2cClkGPIO > 31) || (i2cDataGPIO > 31))
+ return -1;
- if (getChipType() == SM750LE)
- return swI2CInit_SM750LE(i2cClkGPIO, i2cDataGPIO);
+ if (getChipType() == SM750LE)
+ return swI2CInit_SM750LE(i2cClkGPIO, i2cDataGPIO);
- /* Initialize the GPIO pin for the i2c Clock Register */
- g_i2cClkGPIOMuxReg = GPIO_MUX;
- g_i2cClkGPIODataReg = GPIO_DATA;
- g_i2cClkGPIODataDirReg = GPIO_DATA_DIRECTION;
+ /* Initialize the GPIO pin for the i2c Clock Register */
+ g_i2cClkGPIOMuxReg = GPIO_MUX;
+ g_i2cClkGPIODataReg = GPIO_DATA;
+ g_i2cClkGPIODataDirReg = GPIO_DATA_DIRECTION;
- /* Initialize the Clock GPIO Offset */
- g_i2cClockGPIO = i2cClkGPIO;
+ /* Initialize the Clock GPIO Offset */
+ g_i2cClockGPIO = i2cClkGPIO;
- /* Initialize the GPIO pin for the i2c Data Register */
- g_i2cDataGPIOMuxReg = GPIO_MUX;
- g_i2cDataGPIODataReg = GPIO_DATA;
- g_i2cDataGPIODataDirReg = GPIO_DATA_DIRECTION;
+ /* Initialize the GPIO pin for the i2c Data Register */
+ g_i2cDataGPIOMuxReg = GPIO_MUX;
+ g_i2cDataGPIODataReg = GPIO_DATA;
+ g_i2cDataGPIODataDirReg = GPIO_DATA_DIRECTION;
- /* Initialize the Data GPIO Offset */
- g_i2cDataGPIO = i2cDataGPIO;
+ /* Initialize the Data GPIO Offset */
+ g_i2cDataGPIO = i2cDataGPIO;
- /* Enable the GPIO pins for the i2c Clock and Data (GPIO MUX) */
- POKE32(g_i2cClkGPIOMuxReg,
- PEEK32(g_i2cClkGPIOMuxReg) & ~(1 << g_i2cClockGPIO));
- POKE32(g_i2cDataGPIOMuxReg,
- PEEK32(g_i2cDataGPIOMuxReg) & ~(1 << g_i2cDataGPIO));
+ /* Enable the GPIO pins for the i2c Clock and Data (GPIO MUX) */
+ POKE32(g_i2cClkGPIOMuxReg,
+ PEEK32(g_i2cClkGPIOMuxReg) & ~(1 << g_i2cClockGPIO));
+ POKE32(g_i2cDataGPIOMuxReg,
+ PEEK32(g_i2cDataGPIOMuxReg) & ~(1 << g_i2cDataGPIO));
- /* Enable GPIO power */
- enableGPIO(1);
+ /* Enable GPIO power */
+ enableGPIO(1);
- /* Clear the i2c lines. */
- for(i=0; i<9; i++)
- swI2CStop();
+ /* Clear the i2c lines. */
+ for(i=0; i<9; i++)
+ swI2CStop();
- return 0;
+ return 0;
}
/*
* Register value
*/
unsigned char swI2CReadReg(
- unsigned char deviceAddress,
- unsigned char registerIndex
+ unsigned char deviceAddress,
+ unsigned char registerIndex
)
{
- unsigned char data;
+ unsigned char data;
- /* Send the Start signal */
- swI2CStart();
+ /* Send the Start signal */
+ swI2CStart();
- /* Send the device address */
- swI2CWriteByte(deviceAddress);
+ /* Send the device address */
+ swI2CWriteByte(deviceAddress);
- /* Send the register index */
- swI2CWriteByte(registerIndex);
+ /* Send the register index */
+ swI2CWriteByte(registerIndex);
- /* Get the bus again and get the data from the device read address */
- swI2CStart();
- swI2CWriteByte(deviceAddress + 1);
- data = swI2CReadByte(1);
+ /* Get the bus again and get the data from the device read address */
+ swI2CStart();
+ swI2CWriteByte(deviceAddress + 1);
+ data = swI2CReadByte(1);
- /* Stop swI2C and release the bus */
- swI2CStop();
+ /* Stop swI2C and release the bus */
+ swI2CStop();
- return data;
+ return data;
}
/*
* -1 - Fail
*/
long swI2CWriteReg(
- unsigned char deviceAddress,
- unsigned char registerIndex,
- unsigned char data
+ unsigned char deviceAddress,
+ unsigned char registerIndex,
+ unsigned char data
)
{
- long returnValue = 0;
+ long returnValue = 0;
- /* Send the Start signal */
- swI2CStart();
+ /* Send the Start signal */
+ swI2CStart();
- /* 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))
- {
- returnValue = -1;
- }
+ /* 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))
+ {
+ returnValue = -1;
+ }
- /* Stop i2c and release the bus */
- swI2CStop();
+ /* Stop i2c and release the bus */
+ swI2CStop();
- return returnValue;
+ return returnValue;
}
projects / linux-2.6-block.git / commitdiff