FreeBSD/Linux Kernel Cross Reference
sys/dev/terasic/de4led/terasic_de4led.c

     /*-
      * Copyright (c) 2012 Robert N. M. Watson
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
      * ("CTSRD"), as part of the DARPA CRASH research programme.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/11.0/sys/dev/terasic/de4led/terasic_de4led.c 245380 2013-01-13 16:57:11Z rwatson $");
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/rman.h>
    
    #include <machine/bus.h>
    #include <machine/resource.h>
    
    #include <dev/led/led.h>
    #include <dev/terasic/de4led/terasic_de4led.h>
    
    devclass_t      terasic_de4led_devclass;
    
    static void
    terasic_de4led_update(struct terasic_de4led_softc *sc)
    {
    
            TERASIC_DE4LED_LOCK_ASSERT(sc);
    
            bus_write_1(sc->tdl_res, TERASIC_DE4LED_OFF_LED, sc->tdl_bits);
    }
    
    static void
    led_update(struct terasic_de4led_softc *sc, int bit, int onoff)
    {
    
            TERASIC_DE4LED_LOCK(sc);
            TERASIC_DE4LED_SETLED(sc, bit, onoff);
            terasic_de4led_update(sc);
            TERASIC_DE4LED_UNLOCK(sc);
    }
    
    static void
    led_0(void *arg, int onoff)
    {
    
            led_update(arg, 0, onoff);
    }
    
    static void
    led_1(void *arg, int onoff)
    {
    
            led_update(arg, 1, onoff);
    }
    
    static void
    led_2(void *arg, int onoff)
    {
    
            led_update(arg, 2, onoff);
    }
    
    static void
    led_3(void *arg, int onoff)
    {
    
            led_update(arg, 3, onoff);
    }
    
    static void
    led_4(void *arg, int onoff)
    {
    
            led_update(arg, 4, onoff);
   }
   
   static void
   led_5(void *arg, int onoff)
   {
   
           led_update(arg, 5, onoff);
   }
   
   static void
   led_6(void *arg, int onoff)
   {
   
           led_update(arg, 6, onoff);
   }
   
   static void
   led_7(void *arg, int onoff)
   {
   
           led_update(arg, 7, onoff);
   }
   
   void
   terasic_de4led_attach(struct terasic_de4led_softc *sc)
   {
           const char *cmd;
   
           TERASIC_DE4LED_LOCK_INIT(sc);
   
           /*
            * Clear the LED array before we start.
            */
           TERASIC_DE4LED_LOCK(sc);
           TERASIC_DE4LED_CLEARBAR(sc);
           terasic_de4led_update(sc);
           TERASIC_DE4LED_UNLOCK(sc);
   
           /*
            * Register the LED array with led(4).
            */
           sc->tdl_leds[0] = led_create(led_0, sc, "de4led_0");
           sc->tdl_leds[1] = led_create(led_1, sc, "de4led_1");
           sc->tdl_leds[2] = led_create(led_2, sc, "de4led_2");
           sc->tdl_leds[3] = led_create(led_3, sc, "de4led_3");
           sc->tdl_leds[4] = led_create(led_4, sc, "de4led_4");
           sc->tdl_leds[5] = led_create(led_5, sc, "de4led_5");
           sc->tdl_leds[6] = led_create(led_6, sc, "de4led_6");
           sc->tdl_leds[7] = led_create(led_7, sc, "de4led_7");
   
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_0_cmd", &cmd) == 0)
                   led_set("de4led_0", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_1_cmd", &cmd) == 0)
                   led_set("de4led_1", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_2_cmd", &cmd) == 0)
                   led_set("de4led_2", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_3_cmd", &cmd) == 0)
                   led_set("de4led_3", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_4_cmd", &cmd) == 0)
                   led_set("de4led_4", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_5_cmd", &cmd) == 0)
                   led_set("de4led_5", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_6_cmd", &cmd) == 0)
                   led_set("de4led_6", cmd);
           if (resource_string_value(device_get_name(sc->tdl_dev),
               sc->tdl_unit, "de4led_7_cmd", &cmd) == 0)
                   led_set("de4led_7", cmd);
   }
   
   void
   terasic_de4led_detach(struct terasic_de4led_softc *sc)
   {
           int i;
   
           for (i = 0; i < 8; i++) {
                   led_destroy(sc->tdl_leds[i]);
                   sc->tdl_leds[i] = NULL;
           }
           TERASIC_DE4LED_LOCK(sc);
           TERASIC_DE4LED_CLEARBAR(sc);
           terasic_de4led_update(sc);
           TERASIC_DE4LED_UNLOCK(sc);
           TERASIC_DE4LED_LOCK_DESTROY(sc);
   }

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