sound/pci/hda/hda_beep.h

   1 /*
   2  * Digital Beep Input Interface for HD-audio codec
   3  *
   4  * Author: Matthew Ranostay <mranostay@embeddedalley.com>
   5  * Copyright (c) 2008 Embedded Alley Solutions Inc
   6  *
   7  *  This driver is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This driver is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #ifndef __SOUND_HDA_BEEP_H
  23 #define __SOUND_HDA_BEEP_H
  24
  25 #include "hda_codec.h"
  26
  27 #define HDA_BEEP_MODE_OFF       0
  28 #define HDA_BEEP_MODE_ON        1
  29 #define HDA_BEEP_MODE_SWREG     2
  30
  31 /* beep information */
  32 struct hda_beep {
  33         struct input_dev *dev;
  34         struct hda_codec *codec;
  35         unsigned int mode;
  36         char phys[32];
  37         int tone;
  38         hda_nid_t nid;
  39         unsigned int enabled:1;
  40         unsigned int request_enable:1;
  41         unsigned int linear_tone:1;     /* linear tone for IDT/STAC codec */
  42         struct work_struct register_work; /* registration work */
  43         struct delayed_work unregister_work; /* unregistration work */
  44         struct work_struct beep_work; /* scheduled task for beep event */
  45         struct mutex mutex;
  46 };
  47
  48 #ifdef CONFIG_SND_HDA_INPUT_BEEP
  49 int snd_hda_enable_beep_device(struct hda_codec *codec, int enable);
  50 int snd_hda_attach_beep_device(struct hda_codec *codec, int nid);
  51 void snd_hda_detach_beep_device(struct hda_codec *codec);
  52 #else
  53 #define snd_hda_attach_beep_device(...)         0
  54 #define snd_hda_detach_beep_device(...)
  55 #endif
  56 #endif