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/dev/adb/adb_buttons.c

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    1 /*-
    2  * Copyright (c) 2011, Justin Hibbits.
    3  * Copyright (c) 2002, Miodrag Vallat.
    4  * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * OpenBSD: abtn.c,v 1.12 2009/01/10 18:00:59 robert Exp
   29  * NetBSD: abtn.c,v 1.1 1999/07/12 17:48:26 tsubai Exp
   30  *
   31  * $FreeBSD: releng/10.1/sys/dev/adb/adb_buttons.c 226449 2011-10-16 21:01:42Z nwhitehorn $
   32  */
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/module.h>
   37 #include <sys/kernel.h>
   38 #include <sys/bus.h>
   39 
   40 #include <machine/bus.h>
   41 
   42 #include <dev/ofw/openfirm.h>
   43 #include <machine/ofw_machdep.h>
   44 
   45 #include <dev/adb/adb.h>
   46 
   47 #define ABTN_HANDLER_ID 31
   48 
   49 struct abtn_softc {
   50         device_t sc_dev;
   51 
   52         int handler_id;
   53 };
   54 
   55 static int abtn_probe(device_t dev);
   56 static int abtn_attach(device_t dev);
   57 static u_int abtn_receive_packet(device_t dev, u_char status, 
   58     u_char command, u_char reg, int len, u_char *data);
   59 
   60 static device_method_t abtn_methods[] = {
   61         /* Device interface */
   62         DEVMETHOD(device_probe,         abtn_probe),
   63         DEVMETHOD(device_attach,        abtn_attach),
   64         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   65         DEVMETHOD(device_suspend,       bus_generic_suspend),
   66         DEVMETHOD(device_resume,        bus_generic_resume),
   67 
   68         /* ADB interface */
   69         DEVMETHOD(adb_receive_packet,   abtn_receive_packet),
   70 
   71         { 0, 0 }
   72 };
   73 
   74 static driver_t abtn_driver = {
   75         "abtn",
   76         abtn_methods,
   77         sizeof(struct abtn_softc),
   78 };
   79 
   80 static devclass_t abtn_devclass;
   81 
   82 DRIVER_MODULE(abtn, adb, abtn_driver, abtn_devclass, 0, 0);
   83 
   84 static int
   85 abtn_probe(device_t dev)
   86 {
   87         uint8_t type;
   88 
   89         type = adb_get_device_type(dev);
   90 
   91         if (type != ADB_DEVICE_MISC)
   92                 return (ENXIO);
   93 
   94         device_set_desc(dev, "ADB Brightness/Volume/Eject Buttons");
   95         return (0);
   96 }
   97 
   98 static int
   99 abtn_attach(device_t dev) 
  100 {
  101         struct abtn_softc *sc;
  102 
  103         sc = device_get_softc(dev);
  104         sc->sc_dev = dev;
  105 
  106         sc->handler_id = adb_get_device_handler(dev);
  107 
  108         return 0;
  109 }
  110 
  111 static u_int
  112 abtn_receive_packet(device_t dev, u_char status, 
  113     u_char command, u_char reg, int len, u_char *data)
  114 {
  115         u_int cmd;
  116 
  117         cmd = data[0];
  118 
  119         switch (cmd) {
  120         case 0x0a:      /* decrease brightness */
  121                 if (devctl_process_running())
  122                         devctl_notify("PMU", "keys", "brightness",
  123                             "notify=down");
  124                 break;
  125 
  126         case 0x09:      /* increase brightness */
  127                 if (devctl_process_running())
  128                         devctl_notify("PMU", "keys", "brightness", "notify=up");
  129                 break;
  130 
  131         case 0x08:      /* mute */
  132         case 0x01:      /* mute, AV hardware */
  133                 if (devctl_process_running())
  134                         devctl_notify("PMU", "keys", "mute", NULL);
  135                 break;
  136         case 0x07:      /* decrease volume */
  137         case 0x02:      /* decrease volume, AV hardware */
  138                 if (devctl_process_running())
  139                         devctl_notify("PMU", "keys", "volume", "notify=down");
  140                 break;
  141         case 0x06:      /* increase volume */
  142         case 0x03:      /* increase volume, AV hardware */
  143                 if (devctl_process_running())
  144                         devctl_notify("PMU", "keys", "volume", "notify=up");
  145                 break;
  146         case 0x0c:      /* mirror display key */
  147                 /* Need callback to do something with this */
  148                 break;
  149         case 0x0b:      /* eject tray */
  150                 if (devctl_process_running())
  151                         devctl_notify("PMU", "keys", "eject", NULL);
  152         case 0x7f:      /* numlock */
  153                 /* Need callback to do something with this */
  154                 break;
  155 
  156         default:
  157 #ifdef DEBUG
  158                 if ((cmd & ~0x7f) == 0)
  159                         device_printf(dev, "unknown ADB button 0x%x\n", cmd);
  160 #endif
  161                 break;
  162         }
  163         return 0;
  164 }
  165 

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