The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/ixp425/avila_led.c

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    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: releng/7.4/sys/arm/xscale/ixp425/avila_led.c 164508 2006-11-22 12:57:17Z kevlo $");
   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 
   42 static struct cdev *gpioled;
   43 
   44 struct led_avila_softc {
   45         device_t                sc_dev;
   46         bus_space_tag_t         sc_iot;
   47         bus_space_handle_t      sc_gpio_ioh;
   48 };
   49 
   50 static struct led_avila_softc *led_avila_sc = NULL;
   51 
   52 static void
   53 led_func(void *unused, int onoff)
   54 {
   55         struct led_avila_softc *sc = led_avila_sc;
   56         uint32_t reg;
   57 
   58         reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOUTR);
   59         if (onoff)
   60                 reg &= ~GPIO_LED_STATUS_BIT;
   61         else
   62                 reg |= GPIO_LED_STATUS_BIT;
   63         GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOUTR, reg);
   64 }
   65 
   66 static int
   67 led_avila_probe(device_t dev)
   68 {
   69         device_set_desc(dev, "Gateworks Avila GPIO connected LED");
   70         return (0);
   71 }
   72 
   73 static int
   74 led_avila_attach(device_t dev)
   75 {
   76         struct led_avila_softc *sc = device_get_softc(dev);
   77         struct ixp425_softc *sa = device_get_softc(device_get_parent(dev));
   78         void *led = NULL;
   79         uint32_t reg;
   80 
   81         led_avila_sc = sc;
   82 
   83         sc->sc_dev = dev;
   84         sc->sc_iot = sa->sc_iot;
   85         sc->sc_gpio_ioh = sa->sc_gpio_ioh;
   86 
   87         /* Configure LED GPIO pin as output */
   88         reg = GPIO_CONF_READ_4(sc, IXP425_GPIO_GPOER);
   89         reg &= ~GPIO_LED_STATUS_BIT;
   90         GPIO_CONF_WRITE_4(sc, IXP425_GPIO_GPOER, reg);
   91 
   92         gpioled = led_create(led_func, led, "gpioled");
   93 
   94         /* Turn on LED */
   95         led_func(led, 1);
   96 
   97         return (0);
   98 }
   99 
  100 static device_method_t led_avila_methods[] = {
  101         DEVMETHOD(device_probe,         led_avila_probe),
  102         DEVMETHOD(device_attach,        led_avila_attach),
  103 
  104         {0, 0},
  105 };
  106 
  107 static driver_t led_avila_driver = {
  108         "led_avila",
  109         led_avila_methods,
  110         sizeof(struct led_avila_softc),
  111 };
  112 static devclass_t led_avila_devclass;
  113 
  114 DRIVER_MODULE(led_avila, ixp, led_avila_driver, led_avila_devclass, 0, 0);

Cache object: d7370aef5f37a6ae19421cb1afd6730b


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