FreeBSD/Linux Kernel Cross Reference
sys/dev/adb/adb_buttons.c

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2011, Justin Hibbits.
      * Copyright (c) 2002, Miodrag Vallat.
      * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
      *
      * 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.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
     *
     * OpenBSD: abtn.c,v 1.12 2009/01/10 18:00:59 robert Exp
     * NetBSD: abtn.c,v 1.1 1999/07/12 17:48:26 tsubai Exp
     *
     * $FreeBSD$
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/module.h>
    #include <sys/kernel.h>
    #include <sys/bus.h>
    
    #include <machine/bus.h>
    
    #include <dev/ofw/openfirm.h>
    #include <machine/ofw_machdep.h>
    
    #include <dev/adb/adb.h>
    
    #define ABTN_HANDLER_ID 31
    
    struct abtn_softc {
            device_t sc_dev;
    
            int handler_id;
    };
    
    static int abtn_probe(device_t dev);
    static int abtn_attach(device_t dev);
    static u_int abtn_receive_packet(device_t dev, u_char status, 
        u_char command, u_char reg, int len, u_char *data);
    
    static device_method_t abtn_methods[] = {
            /* Device interface */
            DEVMETHOD(device_probe,         abtn_probe),
            DEVMETHOD(device_attach,        abtn_attach),
            DEVMETHOD(device_shutdown,      bus_generic_shutdown),
            DEVMETHOD(device_suspend,       bus_generic_suspend),
            DEVMETHOD(device_resume,        bus_generic_resume),
    
            /* ADB interface */
            DEVMETHOD(adb_receive_packet,   abtn_receive_packet),
            { 0, 0 }
    };
    
    static driver_t abtn_driver = {
            "abtn",
            abtn_methods,
            sizeof(struct abtn_softc),
    };
    
    DRIVER_MODULE(abtn, adb, abtn_driver, 0, 0);
    
    static int
    abtn_probe(device_t dev)
    {
            uint8_t type;
    
            type = adb_get_device_type(dev);
    
            if (type != ADB_DEVICE_MISC)
                    return (ENXIO);
    
            device_set_desc(dev, "ADB Brightness/Volume/Eject Buttons");
            return (0);
    }
    
    static int
    abtn_attach(device_t dev) 
    {
           struct abtn_softc *sc;
   
           sc = device_get_softc(dev);
           sc->sc_dev = dev;
   
           sc->handler_id = adb_get_device_handler(dev);
   
           return 0;
   }
   
   static u_int
   abtn_receive_packet(device_t dev, u_char status, 
       u_char command, u_char reg, int len, u_char *data)
   {
           u_int cmd;
   
           cmd = data[0];
   
           switch (cmd) {
           case 0x0a:      /* decrease brightness */
                   devctl_notify("PMU", "keys", "brightness",
                       "notify=down");
                   break;
   
           case 0x09:      /* increase brightness */
                   devctl_notify("PMU", "keys", "brightness", "notify=up");
                   break;
   
           case 0x08:      /* mute */
           case 0x01:      /* mute, AV hardware */
                   devctl_notify("PMU", "keys", "mute", NULL);
                   break;
           case 0x07:      /* decrease volume */
           case 0x02:      /* decrease volume, AV hardware */
                   devctl_notify("PMU", "keys", "volume", "notify=down");
                   break;
           case 0x06:      /* increase volume */
           case 0x03:      /* increase volume, AV hardware */
                   devctl_notify("PMU", "keys", "volume", "notify=up");
                   break;
           case 0x0c:      /* mirror display key */
                   /* Need callback to do something with this */
                   break;
           case 0x0b:      /* eject tray */
                   devctl_notify("PMU", "keys", "eject", NULL);
                   break;
           case 0x7f:      /* numlock */
                   /* Need callback to do something with this */
                   break;
   
           default:
   #ifdef DEBUG
                   if ((cmd & ~0x7f) == 0)
                           device_printf(dev, "unknown ADB button 0x%x\n", cmd);
   #endif
                   break;
           }
           return 0;
   }

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