111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
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/*
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* COPYRIGHT (C) 2018, Real-Thread Information Technology Ltd
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2012-09-12 heyuanjie87 first version.
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* 2014-03-04 Bernard code cleanup
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*/
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#include <drivers/watchdog.h>
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/* RT-Thread Device Interface */
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/*
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* This function initializes watchdog
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*/
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static rt_err_t rt_watchdog_init(struct rt_device *dev)
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{
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rt_watchdog_t *wtd;
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RT_ASSERT(dev != RT_NULL);
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wtd = (rt_watchdog_t *)dev;
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if (wtd->ops->init)
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{
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return (wtd->ops->init(wtd));
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}
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return (-RT_ENOSYS);
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}
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static rt_err_t rt_watchdog_open(struct rt_device *dev, rt_uint16_t oflag)
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{
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return (RT_EOK);
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}
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static rt_err_t rt_watchdog_close(struct rt_device *dev)
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{
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rt_watchdog_t *wtd;
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RT_ASSERT(dev != RT_NULL);
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wtd = (rt_watchdog_t *)dev;
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if (wtd->ops->control(wtd, RT_DEVICE_CTRL_WDT_STOP, RT_NULL) != RT_EOK)
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{
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rt_kprintf(" This watchdog can not be stoped\n");
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return (-RT_ERROR);
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}
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return (RT_EOK);
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}
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static rt_err_t rt_watchdog_control(struct rt_device *dev,
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int cmd,
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void *args)
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{
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rt_watchdog_t *wtd;
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RT_ASSERT(dev != RT_NULL);
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wtd = (rt_watchdog_t *)dev;
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return (wtd->ops->control(wtd, cmd, args));
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}
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#ifdef RT_USING_DEVICE_OPS
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const static struct rt_device_ops wdt_ops =
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{
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rt_watchdog_init,
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rt_watchdog_open,
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rt_watchdog_close,
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RT_NULL,
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RT_NULL,
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rt_watchdog_control,
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};
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#endif
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/**
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* This function register a watchdog device
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*/
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rt_err_t rt_hw_watchdog_register(struct rt_watchdog_device *wtd,
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const char *name,
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rt_uint32_t flag,
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void *data)
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{
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struct rt_device *device;
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RT_ASSERT(wtd != RT_NULL);
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device = &(wtd->parent);
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device->type = RT_Device_Class_Miscellaneous;
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device->rx_indicate = RT_NULL;
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device->tx_complete = RT_NULL;
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#ifdef RT_USING_DEVICE_OPS
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device->ops = &wdt_ops;
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#else
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device->init = rt_watchdog_init;
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device->open = rt_watchdog_open;
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device->close = rt_watchdog_close;
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device->read = RT_NULL;
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device->write = RT_NULL;
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device->control = rt_watchdog_control;
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#endif
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device->user_data = data;
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/* register a character device */
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return rt_device_register(device, name, flag);
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}
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