void gpio_set_level(enum gpio_signal signal, int value)
{
if (value)
IT83XX_GPIO_DATA(gpio_list[signal].port) |=
gpio_list[signal].mask;
else
IT83XX_GPIO_DATA(gpio_list[signal].port) &=
~gpio_list[signal].mask;
}
void gpio_set_level(enum gpio_signal signal, int value)
{
uint32_t int_mask = get_int_mask();
/* critical section with interrupts off */
interrupt_disable();
if (value)
IT83XX_GPIO_DATA(gpio_list[signal].port) |=
gpio_list[signal].mask;
else
IT83XX_GPIO_DATA(gpio_list[signal].port) &=
~gpio_list[signal].mask;
/* restore interrupts */
set_int_mask(int_mask);
}
void gpio_set_flags_by_mask(uint32_t port, uint32_t mask, uint32_t flags)
{
uint32_t pin = 0;
uint32_t mask_copy = mask;
int irq;
/*
* Select open drain first, so that we don't glitch the signal
* when changing the line to an output.
*/
if (flags & GPIO_OPEN_DRAIN)
IT83XX_GPIO_GPOT(port) |= mask;
else
IT83XX_GPIO_GPOT(port) &= ~mask;
/* To select 1.8v or 3.3v support. */
gpio_1p8v_3p3v_sel(port, mask, flags);
/* If output, set level before changing type to an output. */
if (flags & GPIO_OUTPUT) {
if (flags & GPIO_HIGH)
IT83XX_GPIO_DATA(port) |= mask;
else if (flags & GPIO_LOW)
IT83XX_GPIO_DATA(port) &= ~mask;
}
/* For each bit high in the mask, set input/output and pullup/down. */
while (mask_copy > 0) {
if (mask_copy & 1) {
/* Set input or output. */
if (flags & GPIO_OUTPUT)
IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) =
(IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) | 0x40)
& ~0x80;
else
IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) =
(IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) | 0x80)
& ~0x40;
/* Handle pullup / pulldown */
if (flags & GPIO_PULL_UP) {
IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) =
(IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) | 0x04)
& ~0x02;
} else if (flags & GPIO_PULL_DOWN) {
IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) =
(IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) | 0x02)
& ~0x04;
} else {
/* No pull up/down */
IT83XX_GPIO_CTRL(CTRL_BASE(port), pin) &= ~0x06;
}
}
pin++;
mask_copy >>= 1;
}
/* Set rising edge interrupt. */
if (flags & GPIO_INT_F_RISING) {
irq = gpio_to_irq(port, mask);
*(wuemr(gpio_irqs[irq].wuc_group)) &= ~gpio_irqs[irq].wuc_mask;
}
/*
* Set falling edge or both edges interrupt. Note that pins in WUC
* groups 7, 10, and 12 can only declare a falling edge trigger. All
* other pins can only declare both edges as the trigger.
*
* TODO: use an assert to catch if a developer tries to declare one
* type of interrupt on a pin that doesn't support that type.
*/
if (flags & GPIO_INT_F_FALLING) {
irq = gpio_to_irq(port, mask);
*(wuemr(gpio_irqs[irq].wuc_group)) |= gpio_irqs[irq].wuc_mask;
}
}
test_mockable int gpio_get_level(enum gpio_signal signal)
{
return (IT83XX_GPIO_DATA(gpio_list[signal].port) &
gpio_list[signal].mask) ? 1 : 0;
}