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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-05-06 sundm75 first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#ifdef RT_USING_WDT
#include "drivers/dev_watchdog.h"
#include "drv_wdt.h"
#include "ls1c_wdog.h"
#include "ls1c_clock.h"
typedef enum
{
RESTENABLE = 0x0,
INTERRUPTENABLE = 0x1,
}wdt_enable_mode;
static rt_uint32_t heartbeat = 0;
static rt_err_t wdt_stop(void)
{
rt_err_t ret = RT_EOK;
Wdog_Reset();
ret = (rt_err_t) Wdog_Disable();
if (ret != RT_EOK)
{
rt_kprintf("Wdog_Disable error!\n");
return -RT_ERROR;
}
return ret;
}
static rt_err_t wdt_start(int mode)
{
rt_err_t ret = RT_EOK;
wdt_enable_mode wdt_mode = RESTENABLE;
ret = (rt_err_t) Wdog_Disable();
if (ret != RT_EOK)
{
rt_kprintf("Wdog_Disable error!\n");
return -RT_ERROR;
}
if((mode == RESTENABLE) || (mode == INTERRUPTENABLE))
{
wdt_mode = mode;
}
Wdog_Enable();
Wdog_Set();
if (ret != RT_EOK)
{
rt_kprintf("Wdog_Enable error!\n");
return -RT_ERROR;
}
return ret;
}
static rt_err_t wdt_keepalive(void)
{
rt_err_t ret = RT_EOK;
rt_uint32_t index = 0;
index = heartbeat * clk_get_apb_rate();
ret = (rt_err_t) Wdog_LoadValue(index);
Wdog_Set();
if (ret != 0)
{
rt_kprintf("LS1C_Wdog_ClrTimeout error!\n");
return -RT_ERROR;
}
return ret;
}
static rt_uint32_t wdt_get_timeleft(void)
{
rt_uint32_t cnt = 0;
rt_uint32_t second = 0;
cnt = (rt_uint32_t) Wdog_GetValue();
second = cnt/clk_get_apb_rate();
return second;
}
static rt_err_t wdt_set_timeout(rt_uint32_t second)
{
rt_err_t ret = RT_EOK;
rt_uint32_t index = 0;
index = second * clk_get_apb_rate();
ret = (rt_err_t) Wdog_LoadValue(index);
if (ret != RT_EOK)
{
rt_kprintf("Wdog_LoadValue error!\n");
return -RT_ERROR;
}
return ret;
}
static rt_err_t watchdog_init(rt_watchdog_t *wdt)
{
struct wdt_driver *wdt_drv = wdt->parent.user_data;
if (wdt_drv->in_use) return -RT_EBUSY;
Wdog_Init();
return RT_EOK;
}
static rt_err_t watchdog_ctrl(rt_watchdog_t *wdt, int cmd, void *arg)
{
rt_uint32_t val;
int mode;
switch (cmd)
{
case RT_DEVICE_CTRL_WDT_START:
mode = *((int *)(arg));
wdt_start(mode);
break;
case RT_DEVICE_CTRL_WDT_STOP:
Wdog_Disable();
break;
case RT_DEVICE_CTRL_WDT_KEEPALIVE:
wdt_keepalive();
break;
case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
heartbeat = *((rt_uint32_t *)(arg));
wdt_set_timeout(heartbeat);
break;
case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
arg = &heartbeat;
break;
case RT_DEVICE_CTRL_WDT_GET_TIMELEFT:
val = (rt_uint32_t) wdt_get_timeleft();
arg = &val;
break;
default:
return -RT_EIO;
}
return RT_EOK;
}
struct rt_watchdog_ops watchdog_ops =
{
.init = &watchdog_init,
.control = &watchdog_ctrl,
};
int wdt_exit(void *priv_data)
{
return 0;
}
int rt_hw_wdt_init(void)
{
rt_watchdog_t *wdt_dev;
struct wdt_driver *wdt_drv;
wdt_drv = (struct wdt_driver *)rt_malloc(sizeof(struct wdt_driver));
rt_memset(wdt_drv, 0, sizeof(struct wdt_driver));
wdt_dev = (rt_watchdog_t *)rt_malloc(sizeof(rt_watchdog_t));
if (wdt_dev == RT_NULL)
{
rt_kprintf("ERROR: %s rt_watchdog_t malloc failed\n", __func__);
}
wdt_dev->ops = &watchdog_ops;
rt_hw_watchdog_register(wdt_dev, "wdt", RT_DEVICE_OFLAG_RDWR, wdt_drv);
return 0;
}
INIT_BOARD_EXPORT(rt_hw_wdt_init);
#endif
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