forked from Imagelibrary/rtems
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSBSPsAArch64RaspberryPi
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*
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* @brief Watchdog Driver
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*/
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/*
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* Copyright (C) 2024 Ning Yang
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <bsp/raspberrypi.h>
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#include <bsp/watchdog.h>
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#define PM_WDOG BCM2835_REG(BCM2711_PM_WDOG)
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#define PM_RSTC BCM2835_REG(BCM2711_PM_RSTC)
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uint32_t raspberrypi_watchdog_timeout;
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void raspberrypi_watchdog_init()
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{
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raspberrypi_watchdog_timeout = 0;
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}
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void raspberrypi_watchdog_start(uint32_t timeout_ms)
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{
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raspberrypi_watchdog_timeout = timeout_ms;
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PM_WDOG = BCM2711_PM_PASSWD_MAGIC |
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((timeout_ms * 65536 / 1000) & BCM2711_PM_WDOG_MASK);
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PM_RSTC &= BCM2711_PM_RSTC_WRCFG_CLR;
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PM_RSTC = (BCM2711_PM_PASSWD_MAGIC | BCM2711_PM_RSTC_WRCFG_FULL);
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}
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void raspberrypi_watchdog_stop()
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{
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PM_RSTC = BCM2711_PM_PASSWD_MAGIC | BCM2711_PM_RSTC_RESET;
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}
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void raspberrypi_watchdog_reload()
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{
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raspberrypi_watchdog_start(raspberrypi_watchdog_timeout);
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}
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uint32_t raspberrypi_watchdog_get_remaining_time()
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{
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return (PM_WDOG & BCM2711_PM_WDOG_MASK)*1000/65536;
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} |