From 5deb3317cb51ac52de922bb55f8492624018906d Mon Sep 17 00:00:00 2001
From: Roman Yeryomin <roman@advem.lv>
Date: Thu, 13 Sep 2012 00:40:35 +0300
Subject: Add realtek target files

Signed-off-by: Roman Yeryomin <roman@advem.lv>
---
 target/linux/realtek/files/drivers/serial/i2c.c | 305 ++++++++++++++++++++++++
 1 file changed, 305 insertions(+)
 create mode 100644 target/linux/realtek/files/drivers/serial/i2c.c

(limited to 'target/linux/realtek/files/drivers/serial/i2c.c')

diff --git a/target/linux/realtek/files/drivers/serial/i2c.c b/target/linux/realtek/files/drivers/serial/i2c.c
new file mode 100644
index 000000000..42fdebd03
--- /dev/null
+++ b/target/linux/realtek/files/drivers/serial/i2c.c
@@ -0,0 +1,305 @@
+#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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