Add LP GPIO support for LP Core Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>
209 lines
5.3 KiB
C
209 lines
5.3 KiB
C
/*
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* Copyright (c) 2025 Espressif Systems (Shanghai) Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT espressif_esp32_lpgpio
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#include <soc.h>
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#include <errno.h>
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#include <zephyr/device.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/dt-bindings/gpio/espressif-esp32-gpio.h>
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#include <zephyr/kernel.h>
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#include <zephyr/sys/util.h>
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#include <zephyr/drivers/gpio/gpio_utils.h>
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#include <hal/rtc_io_hal.h>
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#include <soc/rtc_io_periph.h>
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#include <ulp_lp_core_interrupts.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(gpio_esp32, CONFIG_LOG_DEFAULT_LEVEL);
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struct gpio_esp32_lp_config {
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struct gpio_driver_config drv_cfg;
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lp_io_dev_t *const lp_io_dev;
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};
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struct gpio_esp32_lp_data {
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struct gpio_driver_data common;
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sys_slist_t cb;
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};
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void ulp_lp_core_lp_io_intr_handler(void)
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{
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uint32_t intr_status = rtcio_ll_get_interrupt_status();
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const struct device *dev = DEVICE_DT_GET(DT_NODELABEL(lp_gpio));
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struct gpio_esp32_lp_data *data = dev->data;
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rtcio_ll_clear_interrupt_status();
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gpio_fire_callbacks(&data->cb, dev, intr_status);
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}
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bool lp_gpio_is_valid(uint32_t pin)
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{
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return rtc_io_num_map[pin] >= 0;
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}
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static int gpio_esp32_lp_configure(const struct device *dev, gpio_pin_t pin, gpio_flags_t flags)
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{
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if (!lp_gpio_is_valid(pin)) {
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LOG_ERR("Selected LP IO pin is not valid.");
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return -EINVAL;
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}
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rtcio_hal_function_select(pin, RTCIO_FUNC_RTC);
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if (flags & GPIO_OUTPUT) {
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rtcio_hal_set_direction(pin, RTC_GPIO_MODE_OUTPUT_ONLY);
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if (flags & GPIO_OUTPUT_INIT_HIGH) {
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rtcio_hal_set_level(pin, 1);
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} else if (flags & GPIO_OUTPUT_INIT_LOW) {
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rtcio_hal_set_level(pin, 0);
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}
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} else if (flags & GPIO_INPUT) {
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rtcio_hal_set_direction(pin, RTC_GPIO_MODE_INPUT_ONLY);
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}
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return 0;
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}
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static int gpio_esp32_lp_port_get_raw(const struct device *port, uint32_t *value)
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{
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const struct gpio_esp32_lp_config *const cfg = port->config;
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*value = cfg->lp_io_dev->in.val;
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return 0;
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}
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static int gpio_esp32_lp_port_set_masked_raw(const struct device *port, uint32_t mask,
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uint32_t value)
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{
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const struct gpio_esp32_lp_config *const cfg = port->config;
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cfg->lp_io_dev->out_data.val = (cfg->lp_io_dev->out_data.val & ~mask) | (mask & value);
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return 0;
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}
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static int gpio_esp32_lp_port_set_bits_raw(const struct device *port, uint32_t pins)
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{
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const struct gpio_esp32_lp_config *const cfg = port->config;
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cfg->lp_io_dev->out_data_w1ts.val = pins;
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return 0;
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}
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static int gpio_esp32_lp_port_clear_bits_raw(const struct device *port, uint32_t pins)
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{
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const struct gpio_esp32_lp_config *const cfg = port->config;
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cfg->lp_io_dev->out_data_w1tc.val = pins;
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return 0;
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}
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static int gpio_esp32_lp_port_toggle_bits(const struct device *port, uint32_t pins)
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{
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const struct gpio_esp32_lp_config *const cfg = port->config;
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cfg->lp_io_dev->out_data.val ^= pins;
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return 0;
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}
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static int lp_gpio_convert_int_type(enum gpio_int_mode mode, enum gpio_int_trig trig)
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{
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if (mode == GPIO_INT_MODE_DISABLED) {
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return RTCIO_INTR_DISABLE;
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}
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if (mode == GPIO_INT_MODE_LEVEL) {
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switch (trig) {
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case GPIO_INT_TRIG_LOW:
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return RTCIO_INTR_LOW_LEVEL;
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case GPIO_INT_TRIG_HIGH:
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return RTCIO_INTR_HIGH_LEVEL;
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default:
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return -EINVAL;
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}
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} else { /* edge interrupts */
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switch (trig) {
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case GPIO_INT_TRIG_HIGH:
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return RTCIO_INTR_POSEDGE;
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case GPIO_INT_TRIG_LOW:
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return RTCIO_INTR_NEGEDGE;
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case GPIO_INT_TRIG_BOTH:
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return RTCIO_INTR_ANYEDGE;
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default:
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return -EINVAL;
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}
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}
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/* Any other type of interrupt triggering is invalid. */
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return -EINVAL;
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}
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static int gpio_esp32_lp_pin_interrupt_configure(const struct device *dev, gpio_pin_t pin,
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enum gpio_int_mode mode, enum gpio_int_trig trig)
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{
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int intr_trig_mode = lp_gpio_convert_int_type(mode, trig);
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if (!lp_gpio_is_valid(pin)) {
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LOG_ERR("Selected LP IO pin is not valid.");
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return -EINVAL;
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}
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rtcio_ll_clear_interrupt_status();
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ulp_lp_core_intr_enable();
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rtcio_ll_intr_enable(pin, intr_trig_mode);
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return 0;
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}
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static int gpio_esp32_lp_manage_callback(const struct device *dev, struct gpio_callback *callback,
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bool set)
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{
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struct gpio_esp32_lp_data *data = dev->data;
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return gpio_manage_callback(&data->cb, callback, set);
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}
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static uint32_t gpio_esp32_lp_get_pending_int(const struct device *dev)
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{
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ARG_UNUSED(dev);
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return rtcio_ll_get_interrupt_status();
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}
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static int gpio_esp32_lp_init(const struct device *dev)
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{
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return 0;
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}
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static DEVICE_API(gpio, gpio_esp32_lp_driver_api) = {
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.pin_configure = gpio_esp32_lp_configure,
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.port_get_raw = gpio_esp32_lp_port_get_raw,
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.port_set_masked_raw = gpio_esp32_lp_port_set_masked_raw,
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.port_set_bits_raw = gpio_esp32_lp_port_set_bits_raw,
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.port_clear_bits_raw = gpio_esp32_lp_port_clear_bits_raw,
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.port_toggle_bits = gpio_esp32_lp_port_toggle_bits,
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.pin_interrupt_configure = gpio_esp32_lp_pin_interrupt_configure,
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.manage_callback = gpio_esp32_lp_manage_callback,
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.get_pending_int = gpio_esp32_lp_get_pending_int
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};
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static struct gpio_esp32_lp_data gpio_esp32_lp_data_0;
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static struct gpio_esp32_lp_config gpio_esp32_lp_cfg = {
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.drv_cfg = {
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.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_NODE(DT_NODELABEL(lp_gpio)),
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},
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.lp_io_dev = (lp_io_dev_t *)DT_REG_ADDR(DT_NODELABEL(lp_gpio)),
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};
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DEVICE_DT_DEFINE(DT_NODELABEL(lp_gpio), gpio_esp32_lp_init, NULL, &gpio_esp32_lp_data_0,
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&gpio_esp32_lp_cfg, PRE_KERNEL_1, CONFIG_GPIO_INIT_PRIORITY,
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&gpio_esp32_lp_driver_api);
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