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 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/module.h> 34 #include <sys/bus.h> 35 #include <sys/conf.h> 36 #include <sys/kernel.h> 37 38 #include <dev/ofw/ofw_bus.h> 39 #include <dev/ofw/openfirm.h> 40 #include <dev/led/led.h> 41 42 #include "gpio_if.h" 43 44 struct rbled_softc { 45 struct cdev *sc_led; 46 device_t sc_gpio; 47 uint32_t sc_ledpin; 48 }; 49 50 static int rbled_probe(device_t); 51 static int rbled_attach(device_t); 52 static int rbled_detach(device_t); 53 static void rbled_toggle(void *, int); 54 55 static device_method_t rbled_methods[] = { 56 /* Device interface */ 57 DEVMETHOD(device_probe, rbled_probe), 58 DEVMETHOD(device_attach, rbled_attach), 59 DEVMETHOD(device_detach, rbled_detach), 60 61 DEVMETHOD_END 62 }; 63 64 static driver_t rbled_driver = { 65 "rbled", 66 rbled_methods, 67 sizeof(struct rbled_softc), 68 }; 69 70 DRIVER_MODULE(rbled, simplebus, rbled_driver, 0, 0); 71 72 static int 73 rbled_probe(device_t dev) 74 { 75 phandle_t node; 76 const char *name; 77 cell_t gp[2]; 78 char model[6]; 79 80 node = ofw_bus_get_node(dev); 81 82 name = ofw_bus_get_name(dev); 83 if (name == NULL) 84 return (ENXIO); 85 if (strcmp(name, "led") != 0) 86 return (ENXIO); 87 88 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 89 return (ENXIO); 90 91 /* Check root model. */ 92 node = OF_peer(0); 93 if (OF_getprop(node, "model", model, sizeof(model)) <= 0) 94 return (ENXIO); 95 if (strcmp(model, "RB800") != 0) 96 return (ENXIO); 97 98 device_set_desc(dev, "RouterBoard LED"); 99 return (0); 100 } 101 102 static int 103 rbled_attach(device_t dev) 104 { 105 struct rbled_softc *sc; 106 phandle_t node; 107 cell_t gp[2]; 108 109 sc = device_get_softc(dev); 110 node = ofw_bus_get_node(dev); 111 112 if (OF_getprop(node, "user_led", gp, sizeof(gp)) <= 0) 113 return (ENXIO); 114 115 sc->sc_gpio = OF_device_from_xref(gp[0]); 116 if (sc->sc_gpio == NULL) { 117 device_printf(dev, "No GPIO resource found!\n"); 118 return (ENXIO); 119 } 120 sc->sc_ledpin = gp[1]; 121 122 sc->sc_led = led_create(rbled_toggle, sc, "user_led"); 123 124 if (sc->sc_led == NULL) 125 return (ENXIO); 126 127 return (0); 128 } 129 130 static int 131 rbled_detach(device_t dev) 132 { 133 struct rbled_softc *sc; 134 135 sc = device_get_softc(dev); 136 led_destroy(sc->sc_led); 137 138 return (0); 139 } 140 141 static void 142 rbled_toggle(void *priv, int onoff) 143 { 144 struct rbled_softc *sc = priv; 145 146 GPIO_PIN_SET(sc->sc_gpio, sc->sc_ledpin, onoff); 147 } 148