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|
//#include <mach/sync_write.h>
#include <mach/mt_typedefs.h>
#include <mach/dcl_sim_gpio.h>
#include <linux/module.h>
#include <linux/i2c.h>
static struct mutex sim_gpio_lock;
#define MT6306_I2C_NUMBER 0
/******************************************************************************
MACRO Definition
******************************************************************************/
#define MT6306_GPIOTAG "[MT6306_GPIO] "
#define MT6306_GPIOLOG(fmt, arg...) printk(MT6306_GPIOTAG fmt, ##arg)
#define MT6306_GPIOMSG(fmt, arg...) printk(fmt, ##arg)
/*----------------------------------------------------------------------------*/
static struct i2c_client *mt6306_i2c_client = NULL;
static const struct i2c_device_id mt6306_i2c_id[] = {{"mt6306", 0}, {}};
//#ifndef CONFIG_OF
static struct i2c_board_info __initdata i2c_6306 = { I2C_BOARD_INFO("mt6306", 0x64)}; //another is 0x65 if connecting CE0 pin to VIO high
//#endif
/*----------------------------------------------------------------------------*/
void MT6306_Write_Register8(UINT8 var, UINT8 addr)
{
char buffer[2];
buffer[0] = addr;
buffer[1] = var;
i2c_master_send(mt6306_i2c_client, buffer, 2);
}
UINT8 MT6306_Read_Register8(UINT8 addr)
{
UINT8 var;
i2c_master_send(mt6306_i2c_client, &addr, 1);
i2c_master_recv(mt6306_i2c_client, &var, 1);
return var;
}
/*---------------------------------------------------------------------------*/
int mt6306_set_gpio_dir(unsigned long pin, unsigned long dir)
{
UINT8 val;
UINT8 mask;
mutex_lock(&sim_gpio_lock);
switch (pin) {
case 2:
mask = (0x1 << 2);
val = MT6306_Read_Register8(0x00);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 2)&mask);
else
val |= ((0x1 << 2)&mask);
MT6306_Write_Register8(val, 0x00);
break;
case 3:
mask = (0x1 << 0);
val = MT6306_Read_Register8(0x08);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 0)&mask);
else
val |= ((0x1 << 0)&mask);
MT6306_Write_Register8(val, 0x08);
break;
case 4:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x01);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x01);
break;
case 7:
mask = (0x1 << 2);
val = MT6306_Read_Register8(0x05);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 2)&mask);
else
val |= ((0x1 << 2)&mask);
MT6306_Write_Register8(val, 0x05);
break;
case 10:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x05);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x05);
break;
case 11:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x04);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x04);
break;
case 12:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x08);
val &= ~(mask);
if (dir == GPIO_DIR_IN)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x08);
break;
default:
MT6306_GPIOLOG("pin%ld do not support\n", pin);
break;
}
mutex_unlock(&sim_gpio_lock);
MT6306_GPIOLOG("set dir (%ld, %ld) done\n", pin, dir);
return 0/*RSUCCESS*/;
}
/*---------------------------------------------------------------------------*/
int mt6306_get_gpio_dir(unsigned long pin)
{
#if 0
unsigned long pos;
unsigned long bit;
unsigned long data;
GPIO_REGS *reg = gpio_reg;
pos = pin / MAX_GPIO_REG_BITS;
bit = pin % MAX_GPIO_REG_BITS;
data = GPIO_RD32(®->dir[pos].val);
return (((data & (1L << bit)) != 0)? 1: 0);
#endif
return -1;
}
/*---------------------------------------------------------------------------*/
int mt6306_set_gpio_out(unsigned long pin, unsigned long output)
{
UINT8 val;
UINT8 mask;
mutex_lock(&sim_gpio_lock);
switch (pin) {
case 2:
mask = (0x1 << 0);
val = MT6306_Read_Register8(0x00);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 0)&mask);
else
val |= ((0x1 << 0)&mask);
MT6306_Write_Register8(val, 0x00);
break;
case 3:
mask = (0x1 << 0);
val = MT6306_Read_Register8(0x02);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 0)&mask);
else
val |= ((0x1 << 0)&mask);
MT6306_Write_Register8(val, 0x02);
break;
case 4:
mask = (0x1 << 1);
val = MT6306_Read_Register8(0x01);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 1)&mask);
else
val |= ((0x1 << 1)&mask);
MT6306_Write_Register8(val, 0x01);
break;
case 7:
mask = (0x1 << 0);
val = MT6306_Read_Register8(0x05);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 0)&mask);
else
val |= ((0x1 << 0)&mask);
MT6306_Write_Register8(val, 0x05);
break;
case 10:
mask = (0x1 << 1);
val = MT6306_Read_Register8(0x05);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 1)&mask);
else
val |= ((0x1 << 1)&mask);
MT6306_Write_Register8(val, 0x05);
break;
case 11:
mask = (0x1 << 1);
val = MT6306_Read_Register8(0x04);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 1)&mask);
else
val |= ((0x1 << 1)&mask);
MT6306_Write_Register8(val, 0x04);
break;
case 12:
mask = (0x1 << 1);
val = MT6306_Read_Register8(0x06);
val &= ~(mask);
if (output == GPIO_OUT_ZERO)
val |= ((0x0 << 1)&mask);
else
val |= ((0x1 << 1)&mask);
MT6306_Write_Register8(val, 0x06);
break;
default:
MT6306_GPIOLOG("pin%ld do not support\n", pin);
break;
}
mutex_unlock(&sim_gpio_lock);
MT6306_GPIOLOG("set dout(%ld, %ld) done\n", pin, output);
return 0;
}
/*---------------------------------------------------------------------------*/
int mt6306_get_gpio_out(unsigned long pin)
{
#if 0
unsigned long pos;
unsigned long bit;
unsigned long data;
GPIO_REGS *reg = gpio_reg;
pos = pin / MAX_GPIO_REG_BITS;
bit = pin % MAX_GPIO_REG_BITS;
data = GPIO_RD32(®->dout[pos].val);
return (((data & (1L << bit)) != 0)? 1: 0);
#endif
return -1;
}
/*---------------------------------------------------------------------------*/
int mt6306_set_GPIO_pin_group_power(unsigned long group, unsigned long on)
{
UINT8 val;
UINT8 mask;
switch (group) {
case 1:
mask = (0x1 << 2);
val = MT6306_Read_Register8(0x03);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 2)&mask);
else
val |= ((0x1 << 2)&mask);
MT6306_Write_Register8(val, 0x03);
break;
case 2:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x03);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x03);
break;
case 3:
mask = (0x1 << 2);
val = MT6306_Read_Register8(0x07);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 2)&mask);
else
val |= ((0x1 << 2)&mask);
MT6306_Write_Register8(val, 0x07);
break;
case 4:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x07);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x07);
break;
case 5:
mask = (0x1 << 3);
val = MT6306_Read_Register8(0x09);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 3)&mask);
else
val |= ((0x1 << 3)&mask);
MT6306_Write_Register8(val, 0x09);
break;
case 6:
mask = (0x1 << 2);
val = MT6306_Read_Register8(0x09);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 2)&mask);
else
val |= ((0x1 << 2)&mask);
MT6306_Write_Register8(val, 0x09);
break;
case 7:
mask = (0x1 << 1);
val = MT6306_Read_Register8(0x09);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 1)&mask);
else
val |= ((0x1 << 1)&mask);
MT6306_Write_Register8(val, 0x09);
break;
case 8:
mask = (0x1 << 0);
val = MT6306_Read_Register8(0x09);
val &= ~(mask);
if (on == 0)
val |= ((0x0 << 0)&mask);
else
val |= ((0x1 << 0)&mask);
MT6306_Write_Register8(val, 0x09);
break;
default:
break;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int mt6306_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
mt6306_i2c_client = client;
/* mt6306 GPIO initial sequence
Set pin group 1,2,3,4 to GPIO mode */
MT6306_Write_Register8(0x0F, 0x1A);
MT6306_GPIOLOG("addr: 0x1A, value: %x\n", MT6306_Read_Register8(0x1A));
/* Power on GPIO pin group 1,2 */
MT6306_Write_Register8(0x0C, 0x03);
/* Power on GPIO pin group 3,4 */
MT6306_Write_Register8(0x0C, 0x07);
/* Switch VIO to 1.8v */
MT6306_Write_Register8(0x08, 0x10);
#if 0
/* Power select 2.8v on GPIO pin group 1,2*/
MT6306_Write_Register8(0x0C, 0x02);
/* Power select 2.8v on GPIO pin group 3,4*/
MT6306_Write_Register8(0x0C, 0x06);
/* Power select 3.0v on GPIO pin group 1,2*/
MT6306_Write_Register8(0x0F, 0x03);
/* Power select 3.0v on GPIO pin group 3,4*/
MT6306_Write_Register8(0x0F, 0x07);
#endif
MT6306_GPIOLOG("mt6306_i2c_probe, end\n");
return 0;
}
/*---------------------------------------------------------------------------*/
#ifdef CONFIG_PM
/*---------------------------------------------------------------------------*/
void mt6306_gpio_suspend(void)
{
/* Set clock stop H/L to keep/unkeep SCLK/SRST/SIO value */
MT6306_Write_Register8(0x0F, 0x09);
}
/*---------------------------------------------------------------------------*/
void mt6306_gpio_resume(void)
{
/* Set clock stop H/L to keep/unkeep SCLK/SRST/SIO value */
MT6306_Write_Register8(0x00, 0x09);
}
/*---------------------------------------------------------------------------*/
#endif /*CONFIG_PM*/
/*---------------------------------------------------------------------------*/
static int mt6306_i2c_remove(struct i2c_client *client) {return 0;}
#ifdef CONFIG_OF
static const struct of_device_id mt6306_of_match[] = {
{ .compatible = "mediatek,mt6306",},
{ },
};
#endif
struct i2c_driver mt6306_i2c_driver = {
.probe = mt6306_i2c_probe,
.remove = mt6306_i2c_remove,
.driver = {
.name = "mt6306",
#ifdef CONFIG_OF
.of_match_table = mt6306_of_match,
#endif
},
.id_table = mt6306_i2c_id,
};
/* called when loaded into kernel */
static int __init mt6306_gpio_driver_init(void)
{
MT6306_GPIOLOG("MT6306 GPIO driver init\n");
mutex_init(&sim_gpio_lock);
//#ifndef CONFIG_OF
i2c_register_board_info(MT6306_I2C_NUMBER, &i2c_6306, 1);
//#endif
if (i2c_add_driver(&mt6306_i2c_driver)!=0) {
MT6306_GPIOLOG("mt6306_i2c_driver initialization failed!!\n");
return -1;
} else {
MT6306_GPIOLOG("mt6306_i2c_driver initialization succeed!!\n");
}
return 0;
}
/* should never be called */
static void __exit mt6306_gpio_driver_exit(void)
{
MT6306_GPIOLOG("MT6306 GPIO driver exit\n");
}
module_init(mt6306_gpio_driver_init);
module_exit(mt6306_gpio_driver_exit);
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