2 * Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/kthread.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/mutex.h>
42 #include <dev/led/led.h>
44 #include "gpiobus_if.h"
47 * Only one pin for led
51 #define GPIOLED_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
52 #define GPIOLED_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
53 #define GPIOLED_LOCK_INIT(_sc) \
54 mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
56 #define GPIOLED_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx);
63 struct cdev *sc_leddev;
66 static void gpioled_control(void *, int);
67 static int gpioled_probe(device_t);
68 static int gpioled_attach(device_t);
69 static int gpioled_detach(device_t);
72 gpioled_control(void *priv, int onoff)
74 struct gpioled_softc *sc = priv;
76 GPIOBUS_LOCK_BUS(sc->sc_busdev);
77 GPIOBUS_ACQUIRE_BUS(sc->sc_busdev, sc->sc_dev);
78 GPIOBUS_PIN_SET(sc->sc_busdev, sc->sc_dev, GPIOLED_PIN,
79 onoff ? GPIO_PIN_HIGH : GPIO_PIN_LOW);
80 GPIOBUS_RELEASE_BUS(sc->sc_busdev, sc->sc_dev);
81 GPIOBUS_UNLOCK_BUS(sc->sc_busdev);
86 gpioled_probe(device_t dev)
88 device_set_desc(dev, "GPIO led");
93 gpioled_attach(device_t dev)
95 struct gpioled_softc *sc;
98 sc = device_get_softc(dev);
100 sc->sc_busdev = device_get_parent(dev);
101 GPIOLED_LOCK_INIT(sc);
102 if (resource_string_value(device_get_name(dev),
103 device_get_unit(dev), "name", &name))
106 GPIOBUS_PIN_SETFLAGS(sc->sc_busdev, sc->sc_dev, GPIOLED_PIN,
109 sc->sc_leddev = led_create(gpioled_control, sc, name ? name :
110 device_get_nameunit(dev));
116 gpioled_detach(device_t dev)
118 struct gpioled_softc *sc;
120 sc = device_get_softc(dev);
122 led_destroy(sc->sc_leddev);
123 sc->sc_leddev = NULL;
125 GPIOLED_LOCK_DESTROY(sc);
129 static devclass_t gpioled_devclass;
131 static device_method_t gpioled_methods[] = {
132 /* Device interface */
133 DEVMETHOD(device_probe, gpioled_probe),
134 DEVMETHOD(device_attach, gpioled_attach),
135 DEVMETHOD(device_detach, gpioled_detach),
140 static driver_t gpioled_driver = {
143 sizeof(struct gpioled_softc),
146 DRIVER_MODULE(gpioled, gpiobus, gpioled_driver, gpioled_devclass, 0, 0);