unsigned int serial_in_i2c(unsigned int addr, int offset)
{
unsigned short int data_hibyte=0;
unsigned short int data_lowbyte=0;
unsigned short int data;
//printk( "serial_in_i2c(%X):%X\n", addr, offset );
if( addr != ALC5628_I2C_ADDR )
return 0;
// start
i2c_start_condition( &alc5628_i2c_dev );
// addr + write
i2c_serial_write_byte( &alc5628_i2c_dev, ALC5628_I2C_ADDR |
ALC5628_I2C_WRITE );
// read ACK
if( i2c_ACK( &alc5628_i2c_dev ) != 0 )
return 0;
// write register address
i2c_serial_write_byte( &alc5628_i2c_dev, offset );
// read ACK
if( i2c_ACK( &alc5628_i2c_dev ) != 0 )
return 0;
// start
i2c_start_condition( &alc5628_i2c_dev );
// addr + read
i2c_serial_write_byte( &alc5628_i2c_dev, ALC5628_I2C_ADDR |
ALC5628_I2C_READ );
// read ACK
if( i2c_ACK( &alc5628_i2c_dev ) != 0 )
return 0;
// read data_hibyte
i2c_serial_read( &alc5628_i2c_dev, &data_hibyte );
//write ACK
i2c_ACK_w(&alc5628_i2c_dev, 0);
// read data_lowbyte
i2c_serial_read( &alc5628_i2c_dev, &data_lowbyte );
data = (data_hibyte<<8) | data_lowbyte;
// write negative-ACK
i2c_ACK_w( &alc5628_i2c_dev, 1 );
// stop
i2c_stop_condition( &alc5628_i2c_dev );
//printk( "in[%X]\n", data );
return data;
}
/*
@func int | _rtl865xC_i2c_rawRead | Read several bits from device
@parm i2c_dev_t* | pI2C_Dev | Structure containing device information
@parm unsigned char* | pDEV_ID | i2c id address
@parm unsigned char* | pReg | i2c register address
@parm unsigned short int* | pData | i2c data
@comm
*/
static void __i2c_rawRead_alc5621( i2c_dev_t* pI2C_Dev, const unsigned char *pDEV_ID, unsigned char *pReg, unsigned short int *pData)
{
int i;
unsigned short int buf;
unsigned char dev_id, reg;
if ((pData == NULL) || (pDEV_ID == NULL) || (pReg == NULL)) {
printk("Wrong I2C Read function\n");
return;
}
start_condition_read:
//dev_id = (*pDEV_ID<<1) | 0x01; //shift DEV_ID 1-bit left and set bit0 in reading operation
dev_id = (*pDEV_ID<<1) & 0xfe; //shift DEV_ID 1-bit left and unset in writting operation
reg = *pReg;
*pData = 0;
#if 1
i2c_start_condition( pI2C_Dev );
#else
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sdio, 1); /* raise sdio*/
__i2c_setGpioDataBit( pI2C_Dev->sclk, 1); /* raise sclk*/
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_setGpioDataBit( pI2C_Dev->sdio, 0); /* fall down sdio*//*start condition*/
//delay 2 us.
#ifdef __kernel_used__
udelay(2*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<2000*I2C_RATING_FACTOR;i++);
#endif
#endif
i2c_serial_write(pI2C_Dev,&dev_id);//write pDEV_ID,from MSB to LSB
if (i2c_ACK(pI2C_Dev) != 0)
goto start_condition_read;
i2c_serial_write(pI2C_Dev,®);//write pReg,from MSB to LSB
if (i2c_ACK(pI2C_Dev) != 0)
goto start_condition_read;
#if 1
i2c_start_condition( pI2C_Dev );
#else
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sdio, 1); /* raise sdio*/
__i2c_setGpioDataBit( pI2C_Dev->sclk, 1); /* raise sclk*/
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_setGpioDataBit( pI2C_Dev->sdio, 0); /* fall down sdio*//*start condition*/
//delay 2 us.
#ifdef __kernel_used__
udelay(2*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<2000*I2C_RATING_FACTOR;i++);
#endif
#endif
dev_id = (*pDEV_ID<<1) | 0x01; //shift DEV_ID 1-bit left and set bit0 in reading operation
i2c_serial_write(pI2C_Dev,&dev_id);//write pDEV_ID,from MSB to LSB
if (i2c_ACK(pI2C_Dev) != 0)
goto start_condition_read;
buf=0; //init buf data to 0
i2c_serial_read(pI2C_Dev,&buf);//read high byte data from device
i2c_ACK_w(pI2C_Dev, 0); //write ACK
i2c_serial_read(pI2C_Dev,pData);//read low byte data from device
i2c_ACK_w(pI2C_Dev, 1); //write NACK
*pData = *pData | (buf <<8);
#if 1
i2c_stop_condition( pI2C_Dev );
#else
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_setGpioDataBit( pI2C_Dev->sdio, 0); /* fall down sdio*/
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_setGpioDataBit( pI2C_Dev->sclk, 1); /* raise sclk*/
//delay 1 us.
#ifdef __kernel_used__
udelay(1*I2C_RATING_FACTOR);
#endif
#ifdef __test_program_used__
for (i=0;i<1000*I2C_RATING_FACTOR;i++);
#endif
__i2c_setGpioDataBit( pI2C_Dev->sdio, 1); /* raise sdio*//*stop condition*/
#endif
return;
}
