UTS6710/drivers/i2c/drv_i2c_gpioi2c.c

/* ---------------------------------------------------------------------

    Here we defined two functions here for I2C r/w via GPIO

       void DRV_GPIOI2C_WriteFun(UINT8  Mx
                                 UINT8  DeviceID
                                 UINT8  AddrLen
                                 UINT32 Addr
                                 UINT8  *pData
                                 UINT32 DataLen
                                 UINT8  Speed
                                 UINT8  *Status);
      UINT8 DRV_GPIOI2C_ReadFun(UINT8  Mx,
                                UINT8  DeviceID,
                                UINT8  AddrLen,
                                UINT32 Addr,
                                UINT8  *pData,
                                UINT32 DataLen,
                                UINT8  Speed,
                                UINT8  *Status);

   --------------------------------------------------------------------- */

#include <linux/time.h>
#include <linux/delay.h>
#include <drv_gpio.h>
#include "drv_i2c_gpioi2c.h"
#include "drv_i2c_main.h"
#include <drv_i2c.h>
#include "gpio_pin_define.h"
#include "drv_gpio.h"
#include "pin_config.h"

extern  I2C_DEV	I2cDev;

#if CONFIG_CHIPID == 0x330 
    #define GPIO_I2C_CLK	21
    #define GPIO_I2C_DATA	22
#else
    #define GPIO_I2C_CLK	GPIO_I2C_SCL_PIN
    #define GPIO_I2C_DATA	GPIO_I2C_SDA_PIN
#endif
#define GPIO_X_I2C_CLK		21
#define GPIO_X_I2C_DATA     20

#define LAG	         	8  /* 90=50k, 42 = 100k, 12 = 200k */
//#define CONFIG_ENABLE_2ND_GPIO_I2C 
UINT8 GpioI2CSatus;

void i2cGPIOOpenDrainWrite(UINT8 index, UINT32 value);
void MxI2cGPIORestart(void);
void MxI2cGPIOStart(void);
void MxI2cGPIOStop(void);
void MxI2cGPIOWriteByte(UINT8 Value);
UINT8 MxI2cGPIOReadByte(UINT8 bMoreByte);

UINT32 mmioRead(UINT32 addr)
{
	volatile UINT32 dw = *((UINT32*)addr);
	return dw;
}

UINT32 mmioReadMask(UINT32 addr, UINT32 mask)
{
	return mmioRead( addr ) & mask;
}

void mmioWrite(UINT32 addr, UINT32 data)
{
	*(UINT32*)addr = data;
}

void mmioWriteMask(UINT32 addr, UINT32 mask, UINT32 data)
{
	UINT32 dw;
	dw = mmioReadMask( addr, ~mask );
	mmioWrite( addr, ((data & mask) | dw) );
}

void i2cGPIOOpenDrainWrite(UINT8 index, UINT32 value)
{
	UINT8 bits;

	// set GPIO output value
	bits = index ;
	mmioWriteMask(0xbe0f0610,(0x1 << bits),(0x0 << bits));

	// set GPIO input / output control register to "output mode" 
	mmioWriteMask(0xbe0f0618,(0x1 << bits),(value << bits));

	// set "function selection" mux to "GPIO (set '01') " 
	bits = (index % 16) * 2;
	mmioWriteMask(0xbe0f0604,(0x3 << bits),(0x1 << bits));
}

void MxI2cGPIOStart(void)
{
	GpioI2CSatus = 0;
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,0);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
	udelay(LAG);
}

void MxI2cGPIOStop(void)
{
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,0);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,1);
	udelay(LAG);
	i2cGPIO_readGPIO(GPIO_I2C_CLK);
	i2cGPIO_readGPIO(GPIO_I2C_DATA);
	udelay(LAG);
}

void MxI2cGPIORestart(void)
{
	if(GpioI2CSatus) return;
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_DATA,0);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
	udelay(LAG);
}

void MxI2cGPIOWriteByte(UINT8 Value)
{
	UINT8	i;

	if(GpioI2CSatus) return;

	for(i=0;i<8;i++)
	{
		if(Value & 0x80)
		{
			i2cGPIO_writeGPIO(GPIO_I2C_DATA,1);
		}
		else
		{
			i2cGPIO_writeGPIO(GPIO_I2C_DATA,0);
		}
		udelay(LAG);
		i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
		udelay(LAG);
		i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
		udelay(LAG);
		Value <<= 1;
	}
	i2cGPIO_readGPIO(GPIO_I2C_DATA);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
	udelay(LAG);
	if(i2cGPIO_readGPIO(GPIO_I2C_DATA))
	{
		GpioI2CSatus = 1;
	}
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
	udelay(LAG);
}

UINT8 MxI2cGPIOReadByte(UINT8 bMoreByte)
{
	UINT8	i,Value;

	if(GpioI2CSatus) return 0;
	i2cGPIO_readGPIO(GPIO_I2C_DATA);
	udelay(LAG);
	Value = 0;
	for(i=0;i<8;i++)
	{
		Value <<= 1;
		i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
		udelay(LAG);
		if(i2cGPIO_readGPIO(GPIO_I2C_DATA))
		{
			Value |= 1;
		}
		i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
		udelay(LAG);
	}
	if(bMoreByte)
	{
		i2cGPIO_writeGPIO(GPIO_I2C_DATA,0);
	}
	else
	{
		i2cGPIO_writeGPIO(GPIO_I2C_DATA,1);
	}
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_I2C_CLK,0);
	udelay(LAG);
	return Value;
}

void _GPIOI2C_0_WriteFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
	UINT32 i;
    // printk(KERN_EMERG"Mx            = %d",Mx);
    // printk(KERN_EMERG"DeviceID      = 0x%x",DeviceID);
    // printk(KERN_EMERG"AddrLen       = %d",AddrLen);
    // printk(KERN_EMERG"Addr          = %d",Addr);
    // printk(KERN_EMERG"DataLen       = %d",DataLen);
    // printk(KERN_EMERG"Speed         = %d",Speed);  
	DeviceID &= 0xFE;
	if(in_atomic())
	{
		DbgFunPrint("ID=%02x,Invalid Write Process!!",DeviceID);
		*Status = I2C_STATUS_DATA_ERROR;
		return;
	}
    down(&I2cDev.GPIOI2cMutex);
    MxI2cGPIOStart();
	MxI2cGPIOWriteByte(DeviceID);
        
    switch (AddrLen)
    {
        case ADDRESS_TYPE_BYTE:
            MxI2cGPIOWriteByte((UINT8) (Addr & 0xff));	
            MxI2cGPIORestart();
            MxI2cGPIOWriteByte(DeviceID);
        break;
        case ADDRESS_TYPE_MULTIPLE:
            if( ((Addr&0x0f000000) >> 24) >= 1 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>0) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 2 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>8) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 3 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>16) & 0xff));}
            //if( ((Addr&0x0f000000) >> 24) >= 4 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>24) & 0xff));}
            MxI2cGPIORestart();
            MxI2cGPIOWriteByte(DeviceID);
        break;
        case ADDRESS_TYPE_NONE:
        break;
        default:
		    printk("writeI2CviaGPIO write error:AddrLen must be equal to or less than 4.\n");
		    GpioI2CSatus = I2C_STATUS_DATA_ERROR;
        break;
    }

	for(i=0;i<DataLen;i++)
	{
	    MxI2cGPIOWriteByte(pData[i]);
	}	
    MxI2cGPIOStop();
	
	*Status = GpioI2CSatus;	
	up(&I2cDev.GPIOI2cMutex);
} 

void _GPIOI2C_0_ReadFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
	UINT32 i;
    // printk(KERN_EMERG"Mx            = %d",Mx);
    // printk(KERN_EMERG"DeviceID      = 0x%x",DeviceID);
    // printk(KERN_EMERG"AddrLen       = %d",AddrLen);
    // printk(KERN_EMERG"Addr          = %d",Addr);
    // printk(KERN_EMERG"DataLen       = %d",DataLen);
    // printk(KERN_EMERG"Speed         = %d",Speed);
	DeviceID &= 0xFE;
	if(in_atomic())
	{
		DbgFunPrint("ID=%02x,Invalid Read Process!!",DeviceID);
		*Status = I2C_STATUS_DATA_ERROR;
		return;
	}   
    down(&I2cDev.GPIOI2cMutex);      
    MxI2cGPIOStart();
    if(AddrLen != ADDRESS_TYPE_NONE)
        MxI2cGPIOWriteByte(DeviceID);
    switch (AddrLen)
    {
        case ADDRESS_TYPE_BYTE:
            MxI2cGPIOWriteByte((UINT8) (Addr & 0xff));
        break;
        case ADDRESS_TYPE_MULTIPLE:
            if( ((Addr&0x0f000000) >> 24) >= 1 ) { MxI2cGPIOWriteByte((UINT8) (Addr & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 2 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>8) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 3 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>16) & 0xff));}
            //if( ((Addr&0x0f000000) >> 24) >= 4 ) { MxI2cGPIOWriteByte((UINT8) ((Addr>>24) & 0xff));}
        break;
        case ADDRESS_TYPE_NONE:
        break;
        default:         
            printk(KERN_EMERG"writeI2CviaGPIO read error:DataLen must be equal to or less than 4.\n");
            GpioI2CSatus = I2C_STATUS_DATA_ERROR;
        break;
    }
    if (AddrLen != ADDRESS_TYPE_NONE)
        MxI2cGPIORestart();
        MxI2cGPIOWriteByte(DeviceID|1);

	for(i=0;i<DataLen-1;i++)
	{
		pData[i] = MxI2cGPIOReadByte(1);
	}
	pData[i] = MxI2cGPIOReadByte(0);

    MxI2cGPIOStop();
	*Status = GpioI2CSatus;
	           
    up(&I2cDev.GPIOI2cMutex);        

}
//EXPORT_SYMBOL(DRV_GPIOI2C_ReadFun);

void i2cGPIO_writeGPIO(UINT8 idx, UINT8 val)
{
    INT8 apiSel=0;
    if(apiSel == 0) i2cGPIOOpenDrainWrite(idx,val);
    if(apiSel == 1) GPIOWriteFun(idx,val);
    if(apiSel == 2) 
    {
        if(idx == GPIO_I2C_CLK) GPIOSetValueByPinFunc(GPIO_PIN_GPIO_I2C_SCL, (val == 1) ? GPIO_FUNC_ONLEVEL:GPIO_FUNC_OFFLEVEL);
        if(idx == GPIO_I2C_DATA) GPIOSetValueByPinFunc(GPIO_PIN_GPIO_I2C_SDA, (val == 1) ? GPIO_FUNC_ONLEVEL:GPIO_FUNC_OFFLEVEL);
    }
}

UINT8 i2cGPIO_readGPIO(UINT8 idx)
{
    INT8 apiSel=0;
    if(apiSel == 0) {return GPIOReadFun(idx);}
    else if(apiSel == 1) {return GPIOReadFun(idx);}
    else if(apiSel == 2) 
    {
        if(idx == GPIO_I2C_CLK) return GPIOGetValueByPinFunc(GPIO_PIN_GPIO_I2C_SCL);
        if(idx == GPIO_I2C_DATA) return GPIOGetValueByPinFunc(GPIO_PIN_GPIO_I2C_SDA);
        return 0;
    }
    else return 0;
}


#ifdef CONFIG_ENABLE_2ND_GPIO_I2C 
void MxI2cXGPIOStart(void)
{
	GpioI2CSatus = 0;
	
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,1);
	udelay(LAG);	
	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,0);	
	udelay(LAG);	
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
	udelay(LAG);
}

void MxI2cXGPIOStop(void)
{
	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,0);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,1);
	udelay(LAG);
	i2cGPIO_readGPIO(GPIO_X_I2C_CLK);
	i2cGPIO_readGPIO(GPIO_X_I2C_DATA);
	udelay(LAG);
}

void MxI2cXGPIORestart(void)
{
	if(GpioI2CSatus) return;

	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,0);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
	udelay(LAG);
}

void MxI2cXGPIOWriteByte(UINT8 Value)
{
	UINT8	i;

	if(GpioI2CSatus) return;

	for(i=0;i<8;i++)
	{
		if(Value & 0x80)
		{
			i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,1);
		}
		else
		{
			i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,0);
		}
		
		udelay(LAG);
		i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
		udelay(LAG);
		i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
		udelay(LAG);
		Value <<= 1;
	}
	
	i2cGPIO_readGPIO(GPIO_X_I2C_DATA);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
	udelay(LAG);

	if(i2cGPIO_readGPIO(GPIO_X_I2C_DATA))
	{
		GpioI2CSatus = 1;
	}
	
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
	udelay(LAG);
}

UINT8 MxI2cXGPIOReadByte(UINT8 bMoreByte)
{
	UINT8	i,Value;

	if(GpioI2CSatus) return 0;

	i2cGPIO_readGPIO(GPIO_X_I2C_DATA);
	udelay(LAG);
	Value = 0;
	for(i=0;i<8;i++)
	{
		Value <<= 1;
		i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
		udelay(LAG);
		if(i2cGPIO_readGPIO(GPIO_X_I2C_DATA))
		{
			Value |= 1;
		}
		i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
		udelay(LAG);
	}
	if(bMoreByte)
	{
		i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,0);
	}
	else
	{
		i2cGPIO_writeGPIO(GPIO_X_I2C_DATA,1);
	}
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,1);
	udelay(LAG);
	i2cGPIO_writeGPIO(GPIO_X_I2C_CLK,0);
	udelay(LAG);
	return Value;
}

void _GPIOI2C_1_WriteFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
	UINT32 i;
    // printk(KERN_EMERG"Mx            = %d",Mx);
    // printk(KERN_EMERG"DeviceID      = 0x%x",DeviceID);
    // printk(KERN_EMERG"AddrLen       = %d",AddrLen);
    // printk(KERN_EMERG"Addr          = %d",Addr);
    // printk(KERN_EMERG"DataLen       = %d",DataLen);
    // printk(KERN_EMERG"Speed         = %d",Speed);  
	DeviceID &= 0xFE;
	if(in_atomic())
	{
		DbgFunPrint("ID=%02x,Invalid Write Process!!",DeviceID);
		*Status = I2C_STATUS_DATA_ERROR;
		return;
	}
    down(&I2cDev.GPIOXI2cMutex);
    MxI2cXGPIOStart();
	MxI2cXGPIOWriteByte(DeviceID);
    
    switch (AddrLen)
    {
        case ADDRESS_TYPE_BYTE:
            MxI2cXGPIOWriteByte((UINT8) (Addr & 0xff));	
            MxI2cXGPIORestart();
            MxI2cXGPIOWriteByte(DeviceID);
        break;
        case ADDRESS_TYPE_MULTIPLE:
            if( ((Addr&0x0f000000) >> 24) >= 1 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>0) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 2 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>8) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 3 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>16) & 0xff));}
            //if( ((Addr&0x0f000000) >> 24) >= 4 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>24) & 0xff));}
            MxI2cXGPIORestart();
            MxI2cXGPIOWriteByte(DeviceID);
        break;
        case ADDRESS_TYPE_NONE:

        break;
        default:
            printk("writeI2CviaGPIO write error:AddrLen must be equal to or less than 4.\n");
            GpioI2CSatus = I2C_STATUS_DATA_ERROR;
        break;
    }

	for(i=0;i<DataLen;i++)
	{
		MxI2cXGPIOWriteByte(pData[i]);
	}	

    MxI2cXGPIOStop();
	
	*Status = GpioI2CSatus;	
	up(&I2cDev.GPIOXI2cMutex);
}

void _GPIOI2C_1_ReadFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
	UINT32 i;
    // printk(KERN_EMERG"Mx            = %d",Mx);
    // printk(KERN_EMERG"DeviceID      = 0x%x",DeviceID);
    // printk(KERN_EMERG"AddrLen       = %d",AddrLen);
    // printk(KERN_EMERG"Addr          = %d",Addr);
    // printk(KERN_EMERG"DataLen       = %d",DataLen);
    // printk(KERN_EMERG"Speed         = %d",Speed);
	DeviceID &= 0xFE;
	if(in_atomic())
	{
        DbgFunPrint("ID=%02x,Invalid Read Process!!",DeviceID);
        *Status = I2C_STATUS_DATA_ERROR;
		return;
	}   
    down(&I2cDev.GPIOXI2cMutex);      
    MxI2cXGPIOStart();
    if(AddrLen != ADDRESS_TYPE_NONE)
        MxI2cXGPIOWriteByte(DeviceID);
    switch (AddrLen)
    {
        case ADDRESS_TYPE_BYTE:
            MxI2cXGPIOWriteByte((UINT8) (Addr & 0xff));
        break;
        case ADDRESS_TYPE_MULTIPLE:
            if( ((Addr&0x0f000000) >> 24) >= 1 ) { MxI2cXGPIOWriteByte((UINT8) (Addr & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 2 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>8) & 0xff));}
            if( ((Addr&0x0f000000) >> 24) >= 3 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>16) & 0xff));}
            //if( ((Addr&0x0f000000) >> 24) >= 4 ) { MxI2cXGPIOWriteByte((UINT8) ((Addr>>24) & 0xff));}
        break;
        case ADDRESS_TYPE_NONE:
        break;
        default:         
            printk(KERN_EMERG"writeI2CviaGPIO read error:DataLen must be equal to or less than 4.\n");
            GpioI2CSatus = I2C_STATUS_DATA_ERROR;
        break;
    }

    if (AddrLen != ADDRESS_TYPE_NONE)
        MxI2cXGPIORestart();
    MxI2cXGPIOWriteByte(DeviceID|1);

	for(i=0;i<DataLen-1;i++)
	{
		pData[i] = MxI2cXGPIOReadByte(1);
	}
	pData[i] = MxI2cXGPIOReadByte(0);

    MxI2cXGPIOStop();
	*Status = GpioI2CSatus;
	           
    up(&I2cDev.GPIOXI2cMutex);        
}

#endif

void DRV_GPIOI2C_WriteFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
    if(Mx==0)
        _GPIOI2C_0_WriteFun(Mx,  DeviceID,  AddrLen,  Addr, pData,  DataLen, Speed, Status);
#ifdef CONFIG_ENABLE_2ND_GPIO_I2C 
    if(Mx==1)
        _GPIOI2C_1_WriteFun(Mx,  DeviceID,  AddrLen,  Addr, pData,  DataLen, Speed, Status);
#endif
}
EXPORT_SYMBOL(DRV_GPIOI2C_WriteFun);

void DRV_GPIOI2C_ReadFun(UINT8 Mx, UINT8 DeviceID, UINT8 AddrLen, UINT32 Addr,UINT8 *pData, UINT32 DataLen,UINT8 Speed,UINT8 *Status)
{
    if(Mx==0)
        _GPIOI2C_0_ReadFun(Mx,  DeviceID,  AddrLen,  Addr, pData,  DataLen, Speed, Status);
#ifdef CONFIG_ENABLE_2ND_GPIO_I2C 
    if(Mx==1)
        _GPIOI2C_1_ReadFun(Mx,  DeviceID,  AddrLen,  Addr, pData,  DataLen, Speed, Status);
#endif
}
EXPORT_SYMBOL(DRV_GPIOI2C_ReadFun);