int imx_gpio_get_pin(unsigned int pin)
{
u32 gpio_num = IOMUX_TO_GPIO(pin);
u32 gpio_off = GPIO_TO_INDEX(gpio_num);
u32 baddr = PORT_BADDR(GPIO_TO_PORT(gpio_num));
return (__REG(baddr + GPIO_DR) & (1 << gpio_off)) ? 1 : 0;
}
void imx_gpio_pin_cfg_dir(unsigned int pin, int dir)
{
u32 gpio_num = IOMUX_TO_GPIO(pin);
u32 gpio_off = GPIO_TO_INDEX(gpio_num);
u32 baddr = PORT_BADDR(GPIO_TO_PORT(gpio_num));
if (dir)
__REG(baddr + GPIO_GDIR) |= (1 << gpio_off);
else
__REG(baddr + GPIO_GDIR) &= ~(1 << gpio_off);
}
void imx_gpio_set_pin(unsigned int pin, int val)
{
u32 gpio_num = IOMUX_TO_GPIO(pin);
u32 gpio_off = GPIO_TO_INDEX(gpio_num);
u32 baddr = PORT_BADDR(GPIO_TO_PORT(gpio_num));
if (val)
__REG(baddr + GPIO_DR) |= (1 << gpio_off);
else
__REG(baddr + GPIO_DR) &= ~(1 << gpio_off);
}
/*!
* Request ownership for an IO pin. This function has to be the first one
* being called before that pin is used. The caller has to check the
* return value to make sure it returns 0.
*
* @param pin a name defined by \b iomux_pin_name_t
* @param cfg an input function as defined in \b #iomux_pin_cfg_t
*
* @return 0 if successful; Non-zero otherwise
*/
int mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
{
int ret = iomux_config_mux(pin, cfg);
if (GPIO_TO_PORT(IOMUX_TO_GPIO(pin)) < GPIO_PORT_NUM) {
if (((cfg & (~MUX_CONFIG_SION)) == MUX_CONFIG_GPIO) ||
(((cfg & (~MUX_CONFIG_SION)) == MUX_CONFIG_FUNC) &&
((pin == MX35_PIN_GPIO1_0) || (pin == MX35_PIN_GPIO1_1) ||
(pin == MX35_PIN_GPIO2_0) || (pin == MX35_PIN_GPIO3_0))))
ret |= mxc_request_gpio(pin);
}
return ret;
}
/*!
* Release ownership for an IO pin
*
* @param pin a name defined by \b iomux_pin_name_t
* @param cfg an input function as defined in \b #iomux_pin_cfg_t
*/
void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
{
u32 pin_index = PIN_TO_IOMUX_INDEX(pin);
u8 *rp = iomux_pin_res_table + pin_index;
BUG_ON((pin_index > MUX_PIN_NUM_MAX));
*rp = 0;
if (GPIO_TO_PORT(IOMUX_TO_GPIO(pin)) < GPIO_PORT_NUM) {
if (((cfg & (~MUX_CONFIG_SION)) == MUX_CONFIG_GPIO) ||
(((cfg & (~MUX_CONFIG_SION)) == MUX_CONFIG_FUNC) &&
((pin == MX35_PIN_GPIO1_0) || (pin == MX35_PIN_GPIO1_1) ||
(pin == MX35_PIN_GPIO2_0) || (pin == MX35_PIN_GPIO3_0))))
mxc_free_gpio(pin);
}
}
/*
* Find the pointer to the gpio_port for a given pin.
* @param gpio a gpio pin number
* @return pointer to \b struc \b gpio_port
*/
static inline struct gpio_port *get_gpio_port(u32 gpio)
{
return &gpio_port[GPIO_TO_PORT(gpio)];
}
