blob: c99c2b6f93a67fc19c4edaeb5e8018d69103616c [file] [log] [blame]
/*
* Copyright (C) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT espressif_esp32_watchdog
/* Include esp-idf headers first to avoid redefining BIT() macro */
#include <soc/rtc_cntl_reg.h>
#include <soc/timer_group_reg.h>
#include <hal/mwdt_ll.h>
#include <hal/wdt_hal.h>
#include <string.h>
#include <zephyr/drivers/watchdog.h>
#include <zephyr/drivers/clock_control.h>
#ifndef CONFIG_SOC_ESP32C3
#include <zephyr/drivers/interrupt_controller/intc_esp32.h>
#else
#include <zephyr/drivers/interrupt_controller/intc_esp32c3.h>
#endif
#include <zephyr/device.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(wdt_esp32, CONFIG_WDT_LOG_LEVEL);
#ifdef CONFIG_SOC_ESP32C3
#define ISR_HANDLER isr_handler_t
#else
#define ISR_HANDLER intr_handler_t
#endif
#define MWDT_TICK_PRESCALER 40000
#define MWDT_TICKS_PER_US 500
struct wdt_esp32_data {
wdt_hal_context_t hal;
uint32_t timeout;
wdt_stage_action_t mode;
wdt_callback_t callback;
};
struct wdt_esp32_config {
wdt_inst_t wdt_inst;
const struct device *clock_dev;
const clock_control_subsys_t clock_subsys;
void (*connect_irq)(void);
int irq_source;
};
static inline void wdt_esp32_seal(const struct device *dev)
{
struct wdt_esp32_data *data = dev->data;
wdt_hal_write_protect_enable(&data->hal);
}
static inline void wdt_esp32_unseal(const struct device *dev)
{
struct wdt_esp32_data *data = dev->data;
wdt_hal_write_protect_disable(&data->hal);
}
static void wdt_esp32_enable(const struct device *dev)
{
struct wdt_esp32_data *data = dev->data;
wdt_esp32_unseal(dev);
wdt_hal_enable(&data->hal);
wdt_esp32_seal(dev);
}
static int wdt_esp32_disable(const struct device *dev)
{
struct wdt_esp32_data *data = dev->data;
wdt_esp32_unseal(dev);
wdt_hal_disable(&data->hal);
wdt_esp32_seal(dev);
return 0;
}
static void wdt_esp32_isr(void *arg);
static int wdt_esp32_feed(const struct device *dev, int channel_id)
{
struct wdt_esp32_data *data = dev->data;
wdt_esp32_unseal(dev);
wdt_hal_feed(&data->hal);
wdt_esp32_seal(dev);
return 0;
}
static int wdt_esp32_set_config(const struct device *dev, uint8_t options)
{
struct wdt_esp32_data *data = dev->data;
wdt_esp32_unseal(dev);
wdt_hal_config_stage(&data->hal, WDT_STAGE0, data->timeout, WDT_STAGE_ACTION_INT);
wdt_hal_config_stage(&data->hal, WDT_STAGE1, data->timeout, data->mode);
wdt_esp32_enable(dev);
wdt_esp32_seal(dev);
wdt_esp32_feed(dev, 0);
return 0;
}
static int wdt_esp32_install_timeout(const struct device *dev,
const struct wdt_timeout_cfg *cfg)
{
struct wdt_esp32_data *data = dev->data;
if (cfg->window.min != 0U || cfg->window.max == 0U) {
return -EINVAL;
}
data->timeout = cfg->window.max;
data->callback = cfg->callback;
/* Set mode of watchdog and callback */
switch (cfg->flags) {
case WDT_FLAG_RESET_SOC:
data->mode = WDT_STAGE_ACTION_RESET_SYSTEM;
LOG_DBG("Configuring reset SOC mode");
break;
case WDT_FLAG_RESET_CPU_CORE:
data->mode = WDT_STAGE_ACTION_RESET_CPU;
LOG_DBG("Configuring reset CPU mode");
break;
case WDT_FLAG_RESET_NONE:
data->mode = WDT_STAGE_ACTION_OFF;
LOG_DBG("Configuring non-reset mode");
break;
default:
LOG_ERR("Unsupported watchdog config flag");
return -EINVAL;
}
return 0;
}
static int wdt_esp32_init(const struct device *dev)
{
const struct wdt_esp32_config *const config = dev->config;
struct wdt_esp32_data *data = dev->data;
if (!device_is_ready(config->clock_dev)) {
LOG_ERR("clock control device not ready");
return -ENODEV;
}
clock_control_on(config->clock_dev, config->clock_subsys);
wdt_hal_init(&data->hal, config->wdt_inst, MWDT_TICK_PRESCALER, true);
esp_intr_alloc(config->irq_source,
0,
(ISR_HANDLER)wdt_esp32_isr,
(void *)dev,
NULL);
#ifndef CONFIG_WDT_DISABLE_AT_BOOT
wdt_esp32_enable(dev);
#endif
return 0;
}
static const struct wdt_driver_api wdt_api = {
.setup = wdt_esp32_set_config,
.disable = wdt_esp32_disable,
.install_timeout = wdt_esp32_install_timeout,
.feed = wdt_esp32_feed
};
#define ESP32_WDT_INIT(idx) \
static struct wdt_esp32_data wdt##idx##_data; \
static struct wdt_esp32_config wdt_esp32_config##idx = { \
.wdt_inst = WDT_MWDT##idx, \
.irq_source = DT_IRQN(DT_NODELABEL(wdt##idx)), \
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(idx)), \
.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(idx, offset), \
}; \
\
DEVICE_DT_INST_DEFINE(idx, \
wdt_esp32_init, \
NULL, \
&wdt##idx##_data, \
&wdt_esp32_config##idx, \
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
&wdt_api)
static void wdt_esp32_isr(void *arg)
{
const struct device *dev = (const struct device *)arg;
const struct wdt_esp32_config *config = dev->config;
struct wdt_esp32_data *data = dev->data;
if (data->callback) {
data->callback(dev, 0);
}
wdt_hal_handle_intr(&data->hal);
}
#if DT_NODE_HAS_STATUS(DT_NODELABEL(wdt0), okay)
ESP32_WDT_INIT(0);
#endif
#if DT_NODE_HAS_STATUS(DT_NODELABEL(wdt1), okay)
ESP32_WDT_INIT(1);
#endif