int pnx4008_gpio_unregister_pin(unsigned short pin)
{
unsigned long bit = GPIO_BIT(pin);
int ret = -EFAULT; /* Not registered */
gpio_lock();
if (GPIO_ISBID(pin)) {
if (~access_map[GPIO_INDEX] & bit)
goto out;
access_map[GPIO_INDEX] &= ~bit;
} else if (GPIO_ISRAM(pin)) {
if (~access_map[GPIO_INDEX] & bit)
goto out;
access_map[GPIO_INDEX] &= ~bit;
} else if (GPIO_ISMUX(pin)) {
if (~access_map[MUX_INDEX] & bit)
goto out;
access_map[MUX_INDEX] &= ~bit;
} else if (GPIO_ISOUT(pin)) {
if (~access_map[OUTP_INDEX] & bit)
goto out;
access_map[OUTP_INDEX] &= ~bit;
} else if (GPIO_ISIN(pin)) {
if (~access_map[INP_INDEX] & bit)
goto out;
access_map[INP_INDEX] &= ~bit;
} else
goto out;
ret = 0;
out:
gpio_unlock();
return ret;
}
/* Read GPIO pin direction: 0= pin used as input, 1= pin used as output*/
int pnx4008_gpio_read_pin_direction(unsigned short pin)
{
int gpio = GPIO_BIT_MASK(pin);
int ret = -EFAULT;
gpio_lock();
if (GPIO_ISBID(pin) || GPIO_ISRAM(pin)) {
ret = gpio_read_bit(PIO_DRV_STATE, gpio);
}
gpio_unlock();
return ret;
}
/* Value = 0 : Set GPIO pin as input */
int pnx4008_gpio_set_pin_direction(unsigned short pin, int output)
{
int gpio = GPIO_BIT_MASK(pin);
int ret = -EFAULT;
gpio_lock();
if (GPIO_ISBID(pin) || GPIO_ISRAM(pin)) {
ret = gpio_set_bit(output ? PIO_DRV_SET : PIO_DRV_CLR, gpio);
}
gpio_unlock();
return ret;
}
/* Read pin mux function: 0= pin used as GPIO, 1= pin used for muxed function*/
int pnx4008_gpio_read_pin_mux(unsigned short pin)
{
int gpio = GPIO_BIT_MASK(pin);
int ret = -EFAULT;
gpio_lock();
if (GPIO_ISBID(pin)) {
ret = gpio_read_bit(PIO_MUX_STATE, gpio_to_mux_map[gpio]);
} else if (GPIO_ISOUT(pin)) {
ret = gpio_read_bit(PIO_MUX_STATE, outp_to_mux_map[gpio]);
} else if (GPIO_ISMUX(pin)) {
ret = gpio_read_bit(PIO_MUX_STATE, gpio);
}
gpio_unlock();
return ret;
}
/* Value = 0 : Set pin as GPIO */
int pnx4008_gpio_set_pin_mux(unsigned short pin, int output)
{
int gpio = GPIO_BIT_MASK(pin);
int ret = -EFAULT;
gpio_lock();
if (GPIO_ISBID(pin)) {
ret =
gpio_set_bit(output ? PIO_MUX_SET : PIO_MUX_CLR,
gpio_to_mux_map[gpio]);
} else if (GPIO_ISOUT(pin)) {
ret =
gpio_set_bit(output ? PIO_MUX_SET : PIO_MUX_CLR,
outp_to_mux_map[gpio]);
} else if (GPIO_ISMUX(pin)) {
ret = gpio_set_bit(output ? PIO_MUX_SET : PIO_MUX_CLR, gpio);
}
gpio_unlock();
return ret;
}
/* Write Value to output */
int pnx4008_gpio_write_pin(unsigned short pin, int output)
{
int gpio = GPIO_BIT_MASK(pin);
int ret = -EFAULT;
gpio_lock();
if (GPIO_ISOUT(pin)) {
printk( "writing '%x' to '%x'\n",
gpio, output ? PIO_OUTP_SET : PIO_OUTP_CLR );
ret = gpio_set_bit(output ? PIO_OUTP_SET : PIO_OUTP_CLR, gpio);
} else if (GPIO_ISRAM(pin)) {
if (gpio_read_bit(PIO_DRV_STATE, gpio) > 0)
ret = gpio_set_bit(output ? PIO_SDOUTP_SET :
PIO_SDOUTP_CLR, gpio);
} else if (GPIO_ISBID(pin)) {
if (gpio_read_bit(PIO_DRV_STATE, gpio) > 0)
ret = gpio_set_bit(output ? PIO_OUTP_SET :
PIO_OUTP_CLR, gpio);
}
gpio_unlock();
return ret;
}
int pnx4008_gpio_register_pin(unsigned short pin)
{
unsigned long bit = GPIO_BIT(pin);
int ret = -EBUSY; /* Already in use */
gpio_lock();
if (GPIO_ISBID(pin)) {
if (access_map[GPIO_INDEX] & bit)
goto out;
access_map[GPIO_INDEX] |= bit;
} else if (GPIO_ISRAM(pin)) {
if (access_map[GPIO_INDEX] & bit)
goto out;
access_map[GPIO_INDEX] |= bit;
} else if (GPIO_ISMUX(pin)) {
if (access_map[MUX_INDEX] & bit)
goto out;
access_map[MUX_INDEX] |= bit;
} else if (GPIO_ISOUT(pin)) {
if (access_map[OUTP_INDEX] & bit)
goto out;
access_map[OUTP_INDEX] |= bit;
} else if (GPIO_ISIN(pin)) {
if (access_map[INP_INDEX] & bit)
goto out;
access_map[INP_INDEX] |= bit;
} else
goto out;
ret = 0;
out:
gpio_unlock();
return ret;
}
unsigned long pnx4008_gpio_read_pin(unsigned short pin)
{
unsigned long ret = -EFAULT;
int gpio = GPIO_BIT_MASK(pin);
gpio_lock();
if (GPIO_ISOUT(pin)) {
ret = gpio_read_bit(PIO_OUTP_STATE, gpio);
} else if (GPIO_ISRAM(pin)) {
if (gpio_read_bit(PIO_DRV_STATE, gpio) == 0) {
ret = gpio_read_bit(PIO_SDINP_STATE, gpio);
}
} else if (GPIO_ISBID(pin)) {
ret = gpio_read_bit(PIO_DRV_STATE, gpio);
if (ret > 0)
ret = gpio_read_bit(PIO_OUTP_STATE, gpio);
else if (ret == 0)
ret =
gpio_read_bit(PIO_INP_STATE, gpio_to_inp_map[gpio]);
} else if (GPIO_ISIN(pin)) {
ret = gpio_read_bit(PIO_INP_STATE, gpio);
}
gpio_unlock();
return ret;
}
/****************************************************
* FUNCTION: Mutex lock
* PARAMS: port - GPIO port # (0 ~ 31)
* RETURN: N/A
***************************************************/
void GPIO_PortLock(int port)
{
UNUSED(port);
gpio_lock();
}