linux/sound/pci/hda/hda_beep.h
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   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 */
  32struct 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
  49int snd_hda_enable_beep_device(struct hda_codec *codec, int enable);
  50int snd_hda_attach_beep_device(struct hda_codec *codec, int nid);
  51void 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
  57