1/*- 2 * Copyright (c) 2006 Kevin Lo. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25#include <sys/cdefs.h> 26__FBSDID("$FreeBSD$"); 27 28#include <sys/param.h> 29#include <sys/systm.h> 30#include <sys/kernel.h> 31#include <sys/module.h> 32#include <sys/bus.h> 33 34#include <arm/xscale/ixp425/ixp425reg.h> 35#include <arm/xscale/ixp425/ixp425var.h> 36 37#include <dev/led/led.h> 38 39#define GPIO_LED_STATUS 3 40#define GPIO_LED_STATUS_BIT (1U << GPIO_LED_STATUS) 41 42struct led_avila_softc { 43 device_t sc_dev; 44 bus_space_tag_t sc_iot; 45 bus_space_handle_t sc_gpio_ioh; 46 struct cdev *sc_led; 47}; 48 49static void 50led_func(void *arg, int onoff) 51{ 52 struct led_avila_softc *sc = arg; 53 uint32_t reg; 54 55 IXP4XX_GPIO_LOCK(); 56 reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR); 57 if (onoff) 58 reg &= ~GPIO_LED_STATUS_BIT; 59 else 60 reg |= GPIO_LED_STATUS_BIT; 61 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg); 62 IXP4XX_GPIO_UNLOCK(); 63} 64 65static int 66led_avila_probe(device_t dev) 67{ 68 device_set_desc(dev, "Gateworks Avila Front Panel LED"); 69 return (0); 70} 71 72static int 73led_avila_attach(device_t dev) 74{ 75 struct led_avila_softc *sc = device_get_softc(dev); 76 struct ixp425_softc *sa = device_get_softc(device_get_parent(dev)); 77 78 sc->sc_dev = dev; 79 sc->sc_iot = sa->sc_iot; 80 sc->sc_gpio_ioh = sa->sc_gpio_ioh; 81 82 /* Configure LED GPIO pin as output */ 83 GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, 84 GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER) &~ GPIO_LED_STATUS_BIT); 85 86 sc->sc_led = led_create(led_func, sc, "gpioled"); 87 88 led_func(sc, 1); /* Turn on LED */ 89 90 return (0); 91} 92 93static int 94led_avila_detach(device_t dev) 95{ 96 struct led_avila_softc *sc = device_get_softc(dev); 97 98 if (sc->sc_led != NULL) 99 led_destroy(sc->sc_led); 100 return (0); 101} 102 103static device_method_t led_avila_methods[] = { 104 DEVMETHOD(device_probe, led_avila_probe), 105 DEVMETHOD(device_attach, led_avila_attach), 106 DEVMETHOD(device_detach, led_avila_detach), 107 108 {0, 0}, 109}; 110 111static driver_t led_avila_driver = { 112 "led_avila", 113 led_avila_methods, 114 sizeof(struct led_avila_softc), 115}; 116static devclass_t led_avila_devclass; 117 118DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0); 119