mirror of
https://github.com/opnsense/src.git
synced 2026-04-21 14:17:06 -04:00
1595c09ee2
Power off or reset may be activated either by low or high signal or by an edge. So, try everything. Also, the driver now supports DTS properties for timings. Finally, the driver does not change the pin configuration during attach. It is assumed that the pin is already in a state that does not trigger the power event (otherwise we wouldn't be running). (cherry picked from commit 320e4beb97618c6964380bfa404a3e96c5de7663)
153 lines
4.1 KiB
C
153 lines
4.1 KiB
C
/*-
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* Copyright (c) 2016 Justin Hibbits
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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, 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/eventhandler.h>
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#include <sys/gpio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/reboot.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/gpio/gpiobusvar.h>
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struct gpiopower_softc {
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gpio_pin_t sc_pin;
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int sc_rbmask;
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int sc_hi_period;
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int sc_lo_period;
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int sc_timeout;
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};
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static void gpiopower_assert(device_t dev, int howto);
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static int
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gpiopower_probe(device_t dev)
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{
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if (ofw_bus_is_compatible(dev, "gpio-poweroff")) {
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device_set_desc(dev, "GPIO poweroff control");
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return (0);
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} else if (ofw_bus_is_compatible(dev, "gpio-restart")) {
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device_set_desc(dev, "GPIO restart control");
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return (0);
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}
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return (ENXIO);
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}
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static int
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gpiopower_attach(device_t dev)
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{
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struct gpiopower_softc *sc;
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phandle_t node;
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uint32_t prop;
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sc = device_get_softc(dev);
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if ((node = ofw_bus_get_node(dev)) == -1)
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return (ENXIO);
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if (ofw_gpiobus_parse_gpios(dev, "gpios", &sc->sc_pin) <= 0) {
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device_printf(dev, "failed to map GPIO pin\n");
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return (ENXIO);
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}
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if (ofw_bus_is_compatible(dev, "gpio-poweroff"))
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sc->sc_rbmask = RB_HALT | RB_POWEROFF;
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else
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sc->sc_rbmask = 0;
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sc->sc_hi_period = 100000;
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sc->sc_lo_period = 100000;
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sc->sc_timeout = 1000000;
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if ((OF_getprop(node, "active-delay-ms", &prop, sizeof(prop))) > 0)
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sc->sc_hi_period = fdt32_to_cpu(prop) * 1000;
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if ((OF_getprop(node, "inactive-delay-ms", &prop, sizeof(prop))) > 0)
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sc->sc_lo_period = fdt32_to_cpu(prop) * 1000;
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if ((OF_getprop(node, "timeout-ms", &prop, sizeof(prop))) > 0)
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sc->sc_timeout = fdt32_to_cpu(prop) * 1000;
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EVENTHANDLER_REGISTER(shutdown_final, gpiopower_assert, dev,
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SHUTDOWN_PRI_LAST);
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return (0);
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}
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static void
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gpiopower_assert(device_t dev, int howto)
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{
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struct gpiopower_softc *sc;
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int do_assert;
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sc = device_get_softc(dev);
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do_assert = sc->sc_rbmask ? (sc->sc_rbmask & howto) :
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((howto & RB_HALT) == 0);
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if (!do_assert)
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return;
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if (howto & RB_POWEROFF)
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device_printf(dev, "powering system off\n");
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else if ((howto & RB_HALT) == 0)
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device_printf(dev, "resetting system\n");
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else
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return;
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gpio_pin_setflags(sc->sc_pin, GPIO_PIN_OUTPUT);
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gpio_pin_set_active(sc->sc_pin, true);
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DELAY(sc->sc_hi_period);
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gpio_pin_set_active(sc->sc_pin, false);
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DELAY(sc->sc_lo_period);
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gpio_pin_set_active(sc->sc_pin, true);
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DELAY(sc->sc_timeout);
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device_printf(dev, "%s failed\n",
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(howto & RB_POWEROFF) != 0 ? "power off" : "reset");
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}
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static device_method_t gpiopower_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, gpiopower_probe),
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DEVMETHOD(device_attach, gpiopower_attach),
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DEVMETHOD_END
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};
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static driver_t gpiopower_driver = {
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"gpiopower",
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gpiopower_methods,
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sizeof(struct gpiopower_softc)
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};
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DRIVER_MODULE(gpiopower, simplebus, gpiopower_driver, 0, 0);
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MODULE_DEPEND(gpiopower, gpiobus, 1, 1, 1);
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