109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
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* File : watchdog.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2012-2014, Shanghai Real-Thread Electronic Technology Co.,Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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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 serial
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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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/**
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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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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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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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