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#ifdef __UBOOT__
#include <config.h>
#endif
#ifndef __BOOTCODE__
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/string.h>
#endif
#ifndef __UBOOT__
#include <linux/delay.h> // linux and realtek bootcode use
#endif
#include "gpio.h"
#include "i2c.h"
#define __i2c_initGpioPin(pid, dir, interrupt) RTK_GPIO_INIT(pid, GPIO_CONT_GPIO, dir, interrupt)
#define __i2c_getGpioDataBit(pid, pData) RTK_GPIO_GET(pid, pData)
#define __i2c_setGpioDataBit(pid, data) RTK_GPIO_SET(pid, data)
//-----------------------------
#if 0 //0: kernel used(udelay), 1: test program used(for(;;))
#define __test_program_used__
#else
#define __kernel_used__
#endif
#if defined(CONFIG_RTK_VOIP_DRIVERS_CODEC_WM8510)
//----------------------- WM8510 codec ----------------------------------------------
#define I2C_RATING_FACTOR 10 //Adjust I2C read and write rating.
//There is an I2C protocal.
#define _I2C_WM8510_ //GPIO pin
//cli() protection for kernel used. Don't define MACRO _WM8510_CLI_PROTECT in test program.
//#define _WM8510_CLI_PROTECT
#elif defined(CONFIG_RTK_VOIP_DRIVERS_CODEC_ALC5621)
//----------------------- ALC5621 codec ----------------------------------------------
#define I2C_RATING_FACTOR 10 //Adjust I2C read and write rating.
//There is an I2C protocal.
#define _I2C_ALC5621_ //GPIO pin
//cli() protection for kernel used. Don't define MACRO _WM8510_CLI_PROTECT in test program.
#if defined( CONFIG_RTK_VOIP_GPIO_IPP_8972_V00 ) || defined( CONFIG_RTK_VOIP_GPIO_IPP_8972_V01 ) || defined( CONFIG_RTK_VOIP_GPIO_IPP_8972B_V99 )
#define _ALC5621_CLI_PROTECT // 8972 share ALC PIN to other
#endif
#elif defined(CONFIG_SERIAL_SC16IS7X0)
#define I2C_RATING_FACTOR 1
#endif
#ifdef __kernel_used__ // pkshih: If we use udelay, factor 1 should be work, doesn't it?
#undef I2C_RATING_FACTOR
#define I2C_RATING_FACTOR 1
#endif
/************************* I2C read/write function ************************/
void i2c_serial_write_byte(i2c_dev_t* pI2C_Dev, unsigned char data)
{
#ifdef __test_program_used__
int i;
#endif
char j;
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
for (j=7;j>=0;j--) {
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
__i2c_setGpioDataBit( pI2C_Dev->sdio, ((data)>>j)&0x00000001);//write data,from MSB to LSB
//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
__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
}
return;
}
void i2c_serial_write(i2c_dev_t* pI2C_Dev, unsigned char *data)
{
i2c_serial_write_byte( pI2C_Dev, *data );
}
unsigned char i2c_ACK(i2c_dev_t* pI2C_Dev)
{
#ifdef __test_program_used__
int i;
#endif
unsigned int buf;
#if 0
__i2c_setGpioDataBit( pI2C_Dev->sdio, 0); /* fall down sdio*/
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_IN, GPIO_INT_DISABLE);//change sdio to input
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
#endif
//__i2c_setGpioDataBit( pI2C_Dev->sdio, 0); /* fall down sdio*/
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_IN, GPIO_INT_DISABLE);//change sdio to input
//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_getGpioDataBit(pI2C_Dev->sdio,&buf);
if (buf != 0)
printk("NO ACK\n");
//__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
#if 0
//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
#endif
return buf;
}
void i2c_ACK_w(i2c_dev_t* pI2C_Dev, unsigned char data)
{
#ifdef __test_program_used__
int i;
#endif
#if 0
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sdio, data); /* sdio send 0 for ACK, 1 for NACK*/
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
#endif
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
//for (i=0;i<500*I2C_RATING_FACTOR;i++);
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);//change sdio to output
__i2c_setGpioDataBit( pI2C_Dev->sdio, data); /* sdio send 0 for ACK, 1 for NACK*/
//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_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_IN, GPIO_INT_DISABLE);//change sdio to input
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
#if 0
//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
#endif
return;
}
void i2c_serial_read(i2c_dev_t* pI2C_Dev, unsigned short int *data)
{
#ifdef __test_program_used__
int i;
#endif
char j;
unsigned int buf;
*data = 0;
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_IN, GPIO_INT_DISABLE);//change sdio to input
for (j=7;j>=0;j--) {
__i2c_setGpioDataBit( pI2C_Dev->sclk, 0); /* fall down sclk*/
//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
__i2c_setGpioDataBit( pI2C_Dev->sclk, 1); /* raise sclk*/
__i2c_getGpioDataBit( pI2C_Dev->sdio, &buf);//read data,from MSB to LSB
*data |= (buf<<j);
//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
return;
}
void i2c_start_condition(i2c_dev_t* pI2C_Dev)
{
#ifdef __test_program_used__
int 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
}
void i2c_stop_condition(i2c_dev_t* pI2C_Dev)
{
#ifdef __test_program_used__
int i;
#endif
__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*/
}
void i2c_init_SCL_SDA(i2c_dev_t* pI2C_Dev)
{
__i2c_initGpioPin(pI2C_Dev->sclk, GPIO_DIR_OUT, GPIO_INT_DISABLE);
__i2c_setGpioDataBit( pI2C_Dev->sclk, 1 );
__i2c_initGpioPin(pI2C_Dev->sdio, GPIO_DIR_OUT, GPIO_INT_DISABLE);
__i2c_setGpioDataBit( pI2C_Dev->sdio, 1 );
__i2c_setGpioDataBit( pI2C_Dev->reset, 1);
}
void i2c_enable_irq(i2c_dev_t* pI2C_Dev)
{
__i2c_initGpioPin(pI2C_Dev->irq, GPIO_DIR_IN, GPIO_INT_BOTH_EDGE);
}
void i2c_reset(i2c_dev_t* pI2C_Dev)
{
__i2c_initGpioPin(pI2C_Dev->reset, GPIO_DIR_OUT, GPIO_INT_DISABLE);
__i2c_setGpioDataBit( pI2C_Dev->reset, 1);
__i2c_setGpioDataBit( pI2C_Dev->reset, 0);
udelay( 3 ); // delay 3 us
__i2c_setGpioDataBit( pI2C_Dev->reset, 1);
udelay( 3 ); // delay 3us
}
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