19d3b47b92
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
159 lines
4.6 KiB
C
159 lines
4.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
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* All rights reserved.
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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 unmodified, this list of conditions, and the following
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* 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Watchdog driver for AR71xx
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/watchdog.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <mips/atheros/ar71xxreg.h>
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#include <mips/atheros/ar71xx_cpudef.h>
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struct ar71xx_wdog_softc {
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device_t dev;
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int armed;
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int reboot_from_watchdog;
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int debug;
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};
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static void
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ar71xx_wdog_watchdog_fn(void *private, u_int cmd, int *error)
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{
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struct ar71xx_wdog_softc *sc = private;
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uint64_t timer_val;
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cmd &= WD_INTERVAL;
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if (sc->debug)
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device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: cmd: %x\n", cmd);
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if (cmd > 0) {
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timer_val = (uint64_t)(1ULL << cmd) * ar71xx_ahb_freq() /
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1000000000;
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if (sc->debug)
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device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: programming timer: %jx\n", (uintmax_t) timer_val);
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/*
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* Load timer with large enough value to prevent spurious
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* reset
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*/
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ATH_WRITE_REG(AR71XX_RST_WDOG_TIMER,
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ar71xx_ahb_freq() * 10);
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ATH_WRITE_REG(AR71XX_RST_WDOG_CONTROL,
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RST_WDOG_ACTION_RESET);
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ATH_WRITE_REG(AR71XX_RST_WDOG_TIMER,
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(timer_val & 0xffffffff));
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sc->armed = 1;
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*error = 0;
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} else {
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if (sc->debug)
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device_printf(sc->dev, "ar71xx_wdog_watchdog_fn: disarming\n");
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if (sc->armed) {
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ATH_WRITE_REG(AR71XX_RST_WDOG_CONTROL,
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RST_WDOG_ACTION_NOACTION);
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sc->armed = 0;
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}
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}
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}
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static int
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ar71xx_wdog_probe(device_t dev)
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{
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device_set_desc(dev, "Atheros AR71XX watchdog timer");
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return (BUS_PROBE_NOWILDCARD);
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}
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static void
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ar71xx_wdog_sysctl(device_t dev)
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{
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struct ar71xx_wdog_softc *sc = device_get_softc(dev);
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struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
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struct sysctl_oid *tree = device_get_sysctl_tree(sc->dev);
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
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"debug", CTLFLAG_RW, &sc->debug, 0,
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"enable watchdog debugging");
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
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"armed", CTLFLAG_RD, &sc->armed, 0,
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"whether the watchdog is armed");
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SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
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"reboot_from_watchdog", CTLFLAG_RD, &sc->reboot_from_watchdog, 0,
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"whether the system rebooted from the watchdog");
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}
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static int
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ar71xx_wdog_attach(device_t dev)
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{
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struct ar71xx_wdog_softc *sc = device_get_softc(dev);
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/* Initialise */
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sc->reboot_from_watchdog = 0;
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sc->armed = 0;
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sc->debug = 0;
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if (ATH_READ_REG(AR71XX_RST_WDOG_CONTROL) & RST_WDOG_LAST) {
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device_printf (dev,
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"Previous reset was due to watchdog timeout\n");
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sc->reboot_from_watchdog = 1;
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}
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ATH_WRITE_REG(AR71XX_RST_WDOG_CONTROL, RST_WDOG_ACTION_NOACTION);
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sc->dev = dev;
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EVENTHANDLER_REGISTER(watchdog_list, ar71xx_wdog_watchdog_fn, sc, 0);
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ar71xx_wdog_sysctl(dev);
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return (0);
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}
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static device_method_t ar71xx_wdog_methods[] = {
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DEVMETHOD(device_probe, ar71xx_wdog_probe),
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DEVMETHOD(device_attach, ar71xx_wdog_attach),
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{0, 0},
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};
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static driver_t ar71xx_wdog_driver = {
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"ar71xx_wdog",
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ar71xx_wdog_methods,
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sizeof(struct ar71xx_wdog_softc),
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};
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static devclass_t ar71xx_wdog_devclass;
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DRIVER_MODULE(ar71xx_wdog, nexus, ar71xx_wdog_driver, ar71xx_wdog_devclass, 0, 0);
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