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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <zephyr/device.h>
#include <zephyr/drivers/watchdog.h>
#include <zephyr/logging/log.h>
#include <zephyr/kernel.h>
#include "config.h"
#include "hooks.h"
#include "watchdog.h"
LOG_MODULE_REGISTER(watchdog_shim, LOG_LEVEL_ERR);
#define wdt DEVICE_DT_GET(DT_CHOSEN(cros_ec_watchdog))
#ifdef TEST_BUILD
extern bool wdt_warning_triggered;
#endif /* TEST_BUILD */
static void wdt_warning_handler(const struct device *wdt_dev, int channel_id)
{
/* TODO(b/176523207): watchdog warning message */
printk("Watchdog deadline is close!\n");
#ifdef TEST_BUILD
wdt_warning_triggered = true;
#endif
#ifdef CONFIG_SOC_SERIES_MEC172X
extern void cros_chip_wdt_handler(const struct device *wdt_dev,
int channel_id);
cros_chip_wdt_handler(wdt_dev, channel_id);
#endif
}
int watchdog_init(void)
{
int err;
struct wdt_timeout_cfg wdt_config;
if (!device_is_ready(wdt)) {
LOG_ERR("Error: device %s is not ready", wdt->name);
return -1;
}
/* Reset SoC when watchdog timer expires. */
wdt_config.flags = WDT_FLAG_RESET_SOC;
/*
* Set the Warning timer as CONFIG_AUX_TIMER_PERIOD_MS.
* Then the watchdog reset time = CONFIG_WATCHDOG_PERIOD_MS.
*/
wdt_config.window.min = 0U;
wdt_config.window.max = CONFIG_AUX_TIMER_PERIOD_MS;
wdt_config.callback = wdt_warning_handler;
err = wdt_install_timeout(wdt, &wdt_config);
/* If watchdog is running, reinstall it. */
if (err == -EBUSY) {
wdt_disable(wdt);
err = wdt_install_timeout(wdt, &wdt_config);
}
if (err < 0) {
LOG_ERR("Watchdog install error");
return err;
}
err = wdt_setup(wdt, 0);
if (err < 0) {
LOG_ERR("Watchdog setup error");
return err;
}
return EC_SUCCESS;
}
void watchdog_reload(void)
{
if (!device_is_ready(wdt))
LOG_ERR("Error: device %s is not ready", wdt->name);
wdt_feed(wdt, 0);
}
DECLARE_HOOK(HOOK_TICK, watchdog_reload, HOOK_PRIO_DEFAULT);
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