140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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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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* 2019-07-29 zdzn first version
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*/
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#include "drv_wdt.h"
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#ifdef BSP_USING_WDT
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#define SECS_TO_WDOG_TICKS(x) ((x) << 16)
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#define WDOG_TICKS_TO_SECS(x) ((x) >> 16)
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static struct raspi_wdt_driver bcm_wdt;
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void raspi_watchdog_init(rt_uint32_t time_init)
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{
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bcm_wdt.timeout = time_init;
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}
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void raspi_watchdog_start()
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{
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volatile rt_uint32_t cur;
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PM_WDOG = PM_PASSWORD | (SECS_TO_WDOG_TICKS(bcm_wdt.timeout) & PM_WDOG_TIME_SET);
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cur = PM_RSTC;
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PM_RSTC = PM_PASSWORD | (cur & PM_RSTC_WRCFG_CLR) | PM_RSTC_WRCFG_FULL_RESET;
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}
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void raspi_watchdog_stop()
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{
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PM_RSTC = PM_PASSWORD | PM_RSTC_RESET;
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}
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void raspi_watchdog_clr()
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{
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bcm_wdt.timeout = 0;
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}
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void raspi_watchdog_set_timeout(rt_uint32_t timeout_us)
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{
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bcm_wdt.timeout = timeout_us;
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}
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rt_uint64_t raspi_watchdog_get_timeout()
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{
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return bcm_wdt.timeout;
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}
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rt_uint64_t raspi_watchdog_get_timeleft()
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{
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rt_uint32_t ret = PM_WDOG;
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return WDOG_TICKS_TO_SECS(ret & PM_WDOG_TIME_SET);
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}
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static rt_err_t raspi_wdg_init(rt_watchdog_t *wdt)
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{
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/*init for 10S*/
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raspi_watchdog_init(1000000);
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raspi_watchdog_start();
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raspi_watchdog_stop();
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return RT_EOK;
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}
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static rt_err_t raspi_wdg_control(rt_watchdog_t *wdt, int cmd, void *arg)
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{
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rt_uint64_t timeout_us = 0;
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switch (cmd)
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{
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case RT_DEVICE_CTRL_WDT_SET_TIMEOUT:
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timeout_us = *((rt_uint32_t *)arg) * 1000000;
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if (timeout_us >= 0xFFFFFFFF)
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timeout_us = 0xFFFFFFFF;
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raspi_watchdog_set_timeout((rt_uint32_t)timeout_us);
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break;
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case RT_DEVICE_CTRL_WDT_GET_TIMEOUT:
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timeout_us = raspi_watchdog_get_timeout();
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*((rt_uint32_t *)arg) = timeout_us / 1000000;
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break;
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case RT_DEVICE_CTRL_WDT_GET_TIMELEFT:
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timeout_us = raspi_watchdog_get_timeleft();
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*((rt_uint32_t *)arg) = timeout_us / 1000000;
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break;
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case RT_DEVICE_CTRL_WDT_KEEPALIVE:
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raspi_watchdog_clr();
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break;
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case RT_DEVICE_CTRL_WDT_START:
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raspi_watchdog_start();
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break;
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case RT_DEVICE_CTRL_WDT_STOP:
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raspi_watchdog_stop();
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break;
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default:
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return RT_EIO;
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}
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return RT_EOK;
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}
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static const struct rt_watchdog_ops raspi_wdg_pos =
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{
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raspi_wdg_init,
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raspi_wdg_control,
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};
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static rt_watchdog_t raspi_wdg;
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int rt_hw_wdt_init(void)
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{
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raspi_wdg.ops = &raspi_wdg_pos;
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rt_hw_watchdog_register(&raspi_wdg, "wdg", 0, RT_NULL);
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return RT_EOK;
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}
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INIT_DEVICE_EXPORT(rt_hw_wdt_init);
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/**
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* Reboot
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*/
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int reboot(void)
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{
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unsigned int r;
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rt_kprintf("reboot system...\n");
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rt_thread_mdelay(100);
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// trigger a restart by instructing the GPU to boot from partition 0
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r = PM_RSTS; r &= ~0xfffffaaa;
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PM_RSTS = PM_PASSWORD | r; // boot from partition 0
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PM_WDOG = PM_PASSWORD | 10;
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PM_RSTC = PM_PASSWORD | PM_RSTC_WRCFG_FULL_RESET;
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while (1);
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return 0;
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}
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MSH_CMD_EXPORT(reboot,reboot system...);
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#endif /*BSP_USING_WDT */
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