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/param.h> 29 #include <sys/systm.h> 30 #include <sys/module.h> 31 #include <sys/bus.h> 32 #include <sys/conf.h> 33 #include <sys/kernel.h> 34 35 #include <dev/ofw/ofw_bus.h> 36 #include <dev/ofw/openfirm.h> 37 #include <dev/led/led.h> 38 39 #include "gpio_if.h" 40 41 struct rbled_softc { 42 struct cdev *sc_led; 43 device_t sc_gpio; 44 uint32_t sc_ledpin; 45 }; 46 47 static int rbled_probe(device_t); 48 static int rbled_attach(device_t); 49 static int rbled_detach(device_t); 50 static void rbled_toggle(void *, int); 51 52 static device_method_t rbled_methods[] = { 53 /* Device interface */ 54 DEVMETHOD(device_probe, rbled_probe), 55 DEVMETHOD(device_attach, rbled_attach), 56 DEVMETHOD(device_detach, rbled_detach), 57 58 DEVMETHOD_END 59 }; 60 61 static driver_t rbled_driver = { 62 "rbled", 63 rbled_methods, 64 sizeof(struct rbled_softc), 65 }; 66 67 DRIVER_MODULE(rbled, simplebus, rbled_driver, 0, 0); 68 69 static int 70 rbled_probe(device_t dev) 71 { 72 phandle_t node; 73 const char *name; 74 cell_t gp[2]; 75 char model[6]; 76 77 node = ofw_bus_get_node(dev); 78 79 name = ofw_bus_get_name(dev); 80 if (name == NULL) 81 return (ENXIO); 82 if (strcmp(name, "led") != 0) 83 return (ENXIO); 84 85 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 86 return (ENXIO); 87 88 /* Check root model. */ 89 node = OF_peer(0); 90 if (OF_getprop(node, "model", model, sizeof(model)) <= 0) 91 return (ENXIO); 92 if (strcmp(model, "RB800") != 0) 93 return (ENXIO); 94 95 device_set_desc(dev, "RouterBoard LED"); 96 return (0); 97 } 98 99 static int 100 rbled_attach(device_t dev) 101 { 102 struct rbled_softc *sc; 103 phandle_t node; 104 cell_t gp[2]; 105 106 sc = device_get_softc(dev); 107 node = ofw_bus_get_node(dev); 108 109 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 110 return (ENXIO); 111 112 sc->sc_gpio = OF_device_from_xref(gp[0]); 113 if (sc->sc_gpio == NULL) { 114 device_printf(dev, "No GPIO resource found!\n"); 115 return (ENXIO); 116 } 117 sc->sc_ledpin = gp[1]; 118 119 sc->sc_led = led_create(rbled_toggle, sc, "user_led"); 120 121 if (sc->sc_led == NULL) 122 return (ENXIO); 123 124 return (0); 125 } 126 127 static int 128 rbled_detach(device_t dev) 129 { 130 struct rbled_softc *sc; 131 132 sc = device_get_softc(dev); 133 led_destroy(sc->sc_led); 134 135 return (0); 136 } 137 138 static void 139 rbled_toggle(void *priv, int onoff) 140 { 141 struct rbled_softc *sc = priv; 142 143 GPIO_PIN_SET(sc->sc_gpio, sc->sc_ledpin, onoff); 144 } 145