blob: 3cfe41d4a3ddf3141129a00e0c4dfb2d033d5c07 [file] [log] [blame] [edit]
/*
* Copyright 2023 Cypress Semiconductor Corporation (an Infineon company) or
* an affiliate of Cypress Semiconductor Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT infineon_cat1_watchdog
#include "cyhal_wdt.h"
#include <zephyr/devicetree.h>
#include <zephyr/drivers/watchdog.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(wdt_infineon_cat1, CONFIG_WDT_LOG_LEVEL);
#define IFX_CAT1_WDT_IS_IRQ_EN DT_NODE_HAS_PROP(DT_DRV_INST(0), interrupts)
struct ifx_cat1_wdt_data {
cyhal_wdt_t obj;
#ifdef IFX_CAT1_WDT_IS_IRQ_EN
wdt_callback_t callback;
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
uint32_t timeout;
bool timeout_installed;
};
struct ifx_cat1_wdt_data wdt_data;
#ifdef IFX_CAT1_WDT_IS_IRQ_EN
static void ifx_cat1_wdt_isr_handler(const struct device *dev)
{
struct ifx_cat1_wdt_data *dev_data = dev->data;
if (dev_data->callback) {
dev_data->callback(dev, 0);
}
}
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
static int ifx_cat1_wdt_setup(const struct device *dev, uint8_t options)
{
cy_rslt_t result;
struct ifx_cat1_wdt_data *dev_data = dev->data;
/* Initialize the WDT */
result = cyhal_wdt_init(&dev_data->obj, dev_data->timeout);
if (result != CY_RSLT_SUCCESS) {
LOG_ERR("Initialization failure : 0x%x", result);
return -ENOMSG;
}
#ifdef IFX_CAT1_WDT_IS_IRQ_EN
if (dev_data->callback) {
Cy_WDT_UnmaskInterrupt();
irq_enable(DT_INST_IRQN(0));
}
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
return 0;
}
static int ifx_cat1_wdt_disable(const struct device *dev)
{
struct ifx_cat1_wdt_data *dev_data = dev->data;
#ifdef IFX_CAT1_WDT_IS_IRQ_EN
Cy_WDT_MaskInterrupt();
irq_disable(DT_INST_IRQN(0));
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
cyhal_wdt_free(&dev_data->obj);
return 0;
}
static int ifx_cat1_wdt_install_timeout(const struct device *dev, const struct wdt_timeout_cfg *cfg)
{
struct ifx_cat1_wdt_data *dev_data = dev->data;
if (dev_data->timeout_installed) {
LOG_ERR("No more timeouts can be installed");
return -ENOMEM;
}
if (cfg->flags) {
LOG_WRN("Watchdog behavior is not configurable.");
}
if (cfg->callback) {
#ifndef IFX_CAT1_WDT_IS_IRQ_EN
LOG_WRN("Interrupt is not configured, can't set a callback.");
#else
dev_data->callback = cfg->callback;
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
}
/* window watchdog not supported */
if (cfg->window.min != 0U || cfg->window.max == 0U) {
return -EINVAL;
}
dev_data->timeout = cfg->window.max;
return 0;
}
static int ifx_cat1_wdt_feed(const struct device *dev, int channel_id)
{
struct ifx_cat1_wdt_data *data = dev->data;
/* Only channel 0 is supported */
if (channel_id) {
return -EINVAL;
}
cyhal_wdt_kick(&data->obj);
return 0;
}
static int ifx_cat1_wdt_init(const struct device *dev)
{
#ifdef IFX_CAT1_WDT_IS_IRQ_EN
/* Connect WDT interrupt to ISR */
IRQ_CONNECT(DT_INST_IRQN(0), DT_INST_IRQ(0, priority), ifx_cat1_wdt_isr_handler,
DEVICE_DT_INST_GET(0), 0);
#endif /* IFX_CAT1_WDT_IS_IRQ_EN */
return 0;
}
static const struct wdt_driver_api ifx_cat1_wdt_api = {
.setup = ifx_cat1_wdt_setup,
.disable = ifx_cat1_wdt_disable,
.install_timeout = ifx_cat1_wdt_install_timeout,
.feed = ifx_cat1_wdt_feed,
};
DEVICE_DT_INST_DEFINE(0, ifx_cat1_wdt_init, NULL, &wdt_data, NULL, POST_KERNEL,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &ifx_cat1_wdt_api);