text: /* SPDX-License-Identifier: GPL-2.0+ */
  /*
   * Digital Beep Input Interface for HD-audio codec
   *
   * Author: Matt Ranostay <matt.ranostay@konsulko.com>
   * Copyright (c) 2008 Embedded Alley Solutions Inc
   */
  
  #ifndef __SOUND_HDA_BEEP_H
  #define __SOUND_HDA_BEEP_H
  
  #include "hda_codec.h"
  
  #define HDA_BEEP_MODE_OFF	0
  #define HDA_BEEP_MODE_ON	1
  
  /* beep information */
  struct hda_beep {
  	struct input_dev *dev;
  	struct hda_codec *codec;
  	char phys[32];
  	int tone;
  	hda_nid_t nid;
  	unsigned int registered:1;
  	unsigned int enabled:1;
  	unsigned int linear_tone:1;	/* linear tone for IDT/STAC codec */
  	unsigned int playing:1;
  	struct work_struct beep_work; /* scheduled task for beep event */
  	struct mutex mutex;
  	void (*power_hook)(struct hda_beep *beep, bool on);
  };
  
  #ifdef CONFIG_SND_HDA_INPUT_BEEP
  int snd_hda_enable_beep_device(struct hda_codec *codec, int enable);
  int snd_hda_attach_beep_device(struct hda_codec *codec, int nid);
  void snd_hda_detach_beep_device(struct hda_codec *codec);
  int snd_hda_register_beep_device(struct hda_codec *codec);
  #else
  static inline int snd_hda_attach_beep_device(struct hda_codec *codec, int nid)
  {
  	return 0;
  }
  static inline void snd_hda_detach_beep_device(struct hda_codec *codec)
  {
  }
  static inline int snd_hda_register_beep_device(struct hda_codec *codec)
  {
  	return 0;
  }
  #endif
  #endif
  