150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/*-
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* Copyright (c) 2017 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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*/
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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/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/led/led.h>
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#include "gpio_if.h"
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struct rbled_softc {
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struct cdev *sc_led;
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device_t sc_gpio;
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uint32_t sc_ledpin;
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};
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static int rbled_probe(device_t);
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static int rbled_attach(device_t);
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static int rbled_detach(device_t);
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static void rbled_toggle(void *, int);
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static device_method_t rbled_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, rbled_probe),
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DEVMETHOD(device_attach, rbled_attach),
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DEVMETHOD(device_detach, rbled_detach),
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DEVMETHOD_END
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};
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static driver_t rbled_driver = {
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"rbled",
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rbled_methods,
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sizeof(struct rbled_softc),
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};
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static devclass_t rbled_devclass;
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DRIVER_MODULE(rbled, simplebus, rbled_driver, rbled_devclass, 0, 0);
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static int
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rbled_probe(device_t dev)
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{
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phandle_t node;
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const char *name;
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cell_t gp[2];
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char model[6];
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node = ofw_bus_get_node(dev);
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name = ofw_bus_get_name(dev);
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if (name == NULL)
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return (ENXIO);
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if (strcmp(name, "led") != 0)
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return (ENXIO);
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if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0)
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return (ENXIO);
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/* Check root model. */
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node = OF_peer(0);
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if (OF_getprop(node, "model", model, sizeof(model)) <= 0)
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return (ENXIO);
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if (strcmp(model, "RB800") != 0)
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return (ENXIO);
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device_set_desc(dev, "RouterBoard LED");
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return (0);
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}
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static int
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rbled_attach(device_t dev)
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{
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struct rbled_softc *sc;
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phandle_t node;
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cell_t gp[2];
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sc = device_get_softc(dev);
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node = ofw_bus_get_node(dev);
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if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0)
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return (ENXIO);
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sc->sc_gpio = OF_device_from_xref(gp[0]);
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if (sc->sc_gpio == NULL) {
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device_printf(dev, "No GPIO resource found!\n");
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return (ENXIO);
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}
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sc->sc_ledpin = gp[1];
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sc->sc_led = led_create(rbled_toggle, sc, "user_led");
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if (sc->sc_led == NULL)
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return (ENXIO);
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return (0);
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}
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static int
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rbled_detach(device_t dev)
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{
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struct rbled_softc *sc;
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sc = device_get_softc(dev);
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led_destroy(sc->sc_led);
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return (0);
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}
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static void
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rbled_toggle(void *priv, int onoff)
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{
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struct rbled_softc *sc = priv;
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GPIO_PIN_SET(sc->sc_gpio, sc->sc_ledpin, onoff);
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}
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