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/*
* Copyright (c) 2021 Teslabs Engineering S.L.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT gd_gd32_exti
#include <errno.h>
#include <zephyr/device.h>
#include <zephyr/drivers/interrupt_controller/gd32_exti.h>
#include <zephyr/sys/__assert.h>
#include <zephyr/irq.h>
#include <zephyr/sys/util_macro.h>
#include <gd32_exti.h>
/** Unsupported line indicator */
#define EXTI_NOTSUP 0xFFU
/** Number of EXTI lines. */
#define NUM_EXTI_LINES DT_INST_PROP(0, num_lines)
/** @brief EXTI line ranges hold by a single ISR */
struct gd32_exti_range {
/** Start of the range */
uint8_t min;
/** End of the range */
uint8_t max;
};
/** @brief EXTI line interrupt callback. */
struct gd32_cb_data {
/** Callback function */
gd32_exti_cb_t cb;
/** User data. */
void *user;
};
/** EXTI driver data. */
struct gd32_exti_data {
/** Array of callbacks. */
struct gd32_cb_data cbs[NUM_EXTI_LINES];
};
#ifdef CONFIG_GPIO_GD32
static const struct gd32_exti_range line0_range = {0U, 0U};
static const struct gd32_exti_range line1_range = {1U, 1U};
static const struct gd32_exti_range line2_range = {2U, 2U};
static const struct gd32_exti_range line3_range = {3U, 3U};
static const struct gd32_exti_range line4_range = {4U, 4U};
static const struct gd32_exti_range line5_9_range = {5U, 9U};
static const struct gd32_exti_range line10_15_range = {10U, 15U};
#endif /* CONFIG_GPIO_GD32 */
/** @brief Obtain line IRQ number if enabled. */
#define EXTI_LINE_IRQ_COND(enabled, line) \
COND_CODE_1(enabled, (DT_INST_IRQ_BY_NAME(0, line, irq)), (EXTI_NOTSUP))
static const uint8_t line2irq[NUM_EXTI_LINES] = {
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line0),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line1),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line2),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line3),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line4),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line5_9),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line5_9),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line5_9),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line5_9),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line5_9),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_LINE_IRQ_COND(CONFIG_GPIO_GD32, line10_15),
EXTI_NOTSUP,
EXTI_NOTSUP,
EXTI_NOTSUP,
#ifdef CONFIG_SOC_SERIES_GD32F4XX
EXTI_NOTSUP,
EXTI_NOTSUP,
EXTI_NOTSUP,
EXTI_NOTSUP,
#endif /* CONFIG_SOC_SERIES_GD32F4XX */
};
__unused static void gd32_exti_isr(const void *isr_data)
{
const struct device *const dev = DEVICE_DT_INST_GET(0);
struct gd32_exti_data *data = dev->data;
const struct gd32_exti_range *range = isr_data;
for (uint8_t i = range->min; i <= range->max; i++) {
if ((EXTI_PD & BIT(i)) != 0U) {
EXTI_PD = BIT(i);
if (data->cbs[i].cb != NULL) {
data->cbs[i].cb(i, data->cbs[i].user);
}
}
}
}
void gd32_exti_enable(uint8_t line)
{
__ASSERT_NO_MSG(line < NUM_EXTI_LINES);
__ASSERT_NO_MSG(line2irq[line] != EXTI_NOTSUP);
EXTI_INTEN |= BIT(line);
irq_enable(line2irq[line]);
}
void gd32_exti_disable(uint8_t line)
{
__ASSERT_NO_MSG(line < NUM_EXTI_LINES);
__ASSERT_NO_MSG(line2irq[line] != EXTI_NOTSUP);
EXTI_INTEN &= ~BIT(line);
}
void gd32_exti_trigger(uint8_t line, uint8_t trigger)
{
__ASSERT_NO_MSG(line < NUM_EXTI_LINES);
__ASSERT_NO_MSG(line2irq[line] != EXTI_NOTSUP);
if ((trigger & GD32_EXTI_TRIG_RISING) != 0U) {
EXTI_RTEN |= BIT(line);
} else {
EXTI_RTEN &= ~BIT(line);
}
if ((trigger & GD32_EXTI_TRIG_FALLING) != 0U) {
EXTI_FTEN |= BIT(line);
} else {
EXTI_FTEN &= ~BIT(line);
}
}
int gd32_exti_configure(uint8_t line, gd32_exti_cb_t cb, void *user)
{
const struct device *const dev = DEVICE_DT_INST_GET(0);
struct gd32_exti_data *data = dev->data;
__ASSERT_NO_MSG(line < NUM_EXTI_LINES);
__ASSERT_NO_MSG(line2irq[line] != EXTI_NOTSUP);
if ((data->cbs[line].cb != NULL) && (cb != NULL)) {
return -EALREADY;
}
data->cbs[line].cb = cb;
data->cbs[line].user = user;
return 0;
}
static int gd32_exti_init(const struct device *dev)
{
#ifdef CONFIG_GPIO_GD32
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line0, irq),
DT_INST_IRQ_BY_NAME(0, line0, priority),
gd32_exti_isr, &line0_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line1, irq),
DT_INST_IRQ_BY_NAME(0, line1, priority),
gd32_exti_isr, &line1_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line2, irq),
DT_INST_IRQ_BY_NAME(0, line2, priority),
gd32_exti_isr, &line2_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line3, irq),
DT_INST_IRQ_BY_NAME(0, line3, priority),
gd32_exti_isr, &line3_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line4, irq),
DT_INST_IRQ_BY_NAME(0, line4, priority),
gd32_exti_isr, &line4_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line5_9, irq),
DT_INST_IRQ_BY_NAME(0, line5_9, priority),
gd32_exti_isr, &line5_9_range, 0);
IRQ_CONNECT(DT_INST_IRQ_BY_NAME(0, line10_15, irq),
DT_INST_IRQ_BY_NAME(0, line10_15, priority),
gd32_exti_isr, &line10_15_range, 0);
#endif /* CONFIG_GPIO_GD32 */
return 0;
}
static struct gd32_exti_data data;
DEVICE_DT_INST_DEFINE(0, gd32_exti_init, NULL, &data, NULL, PRE_KERNEL_1,
CONFIG_INTC_INIT_PRIORITY, NULL);