1 /*- 2 * Copyright (c) 2017 Justin Hibbits 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22 * 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 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/module.h> 32 #include <sys/bus.h> 33 #include <sys/conf.h> 34 #include <sys/kernel.h> 35 36 #include <dev/ofw/ofw_bus.h> 37 #include <dev/ofw/openfirm.h> 38 #include <dev/led/led.h> 39 40 #include "gpio_if.h" 41 42 struct rbled_softc { 43 struct cdev *sc_led; 44 device_t sc_gpio; 45 uint32_t sc_ledpin; 46 }; 47 48 static int rbled_probe(device_t); 49 static int rbled_attach(device_t); 50 static int rbled_detach(device_t); 51 static void rbled_toggle(void *, int); 52 53 static device_method_t rbled_methods[] = { 54 /* Device interface */ 55 DEVMETHOD(device_probe, rbled_probe), 56 DEVMETHOD(device_attach, rbled_attach), 57 DEVMETHOD(device_detach, rbled_detach), 58 59 DEVMETHOD_END 60 }; 61 62 static driver_t rbled_driver = { 63 "rbled", 64 rbled_methods, 65 sizeof(struct rbled_softc), 66 }; 67 68 DRIVER_MODULE(rbled, simplebus, rbled_driver, 0, 0); 69 70 static int 71 rbled_probe(device_t dev) 72 { 73 phandle_t node; 74 const char *name; 75 cell_t gp[2]; 76 char model[6]; 77 78 node = ofw_bus_get_node(dev); 79 80 name = ofw_bus_get_name(dev); 81 if (name == NULL) 82 return (ENXIO); 83 if (strcmp(name, "led") != 0) 84 return (ENXIO); 85 86 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 87 return (ENXIO); 88 89 /* Check root model. */ 90 node = OF_peer(0); 91 if (OF_getprop(node, "model", model, sizeof(model)) <= 0) 92 return (ENXIO); 93 if (strcmp(model, "RB800") != 0) 94 return (ENXIO); 95 96 device_set_desc(dev, "RouterBoard LED"); 97 return (0); 98 } 99 100 static int 101 rbled_attach(device_t dev) 102 { 103 struct rbled_softc *sc; 104 phandle_t node; 105 cell_t gp[2]; 106 107 sc = device_get_softc(dev); 108 node = ofw_bus_get_node(dev); 109 110 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 111 return (ENXIO); 112 113 sc->sc_gpio = OF_device_from_xref(gp[0]); 114 if (sc->sc_gpio == NULL) { 115 device_printf(dev, "No GPIO resource found!\n"); 116 return (ENXIO); 117 } 118 sc->sc_ledpin = gp[1]; 119 120 sc->sc_led = led_create(rbled_toggle, sc, "user_led"); 121 122 if (sc->sc_led == NULL) 123 return (ENXIO); 124 125 return (0); 126 } 127 128 static int 129 rbled_detach(device_t dev) 130 { 131 struct rbled_softc *sc; 132 133 sc = device_get_softc(dev); 134 led_destroy(sc->sc_led); 135 136 return (0); 137 } 138 139 static void 140 rbled_toggle(void *priv, int onoff) 141 { 142 struct rbled_softc *sc = priv; 143 144 GPIO_PIN_SET(sc->sc_gpio, sc->sc_ledpin, onoff); 145 } 146