#ifndef __SOUND_AK4531_CODEC_H
  #define __SOUND_AK4531_CODEC_H
  
  /*

   *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>

   *  Universal interface for Audio Codec '97
   *
   *  For more details look to AC '97 component specification revision 2.1
   *  by Intel Corporation (http://developer.intel.com).
   *
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *   GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   *
   */
  
  #include "info.h"
  #include "control.h"
  
  /*
   *  ASAHI KASEI - AK4531 codec
   *  - not really AC'97 codec, but it uses very similar interface as AC'97
   */
  
  /*
   *  AK4531 codec registers
   */
  
  #define AK4531_LMASTER  0x00	/* master volume left */
  #define AK4531_RMASTER  0x01	/* master volume right */
  #define AK4531_LVOICE   0x02	/* channel volume left */
  #define AK4531_RVOICE   0x03	/* channel volume right */
  #define AK4531_LFM      0x04	/* FM volume left */
  #define AK4531_RFM      0x05	/* FM volume right */
  #define AK4531_LCD      0x06	/* CD volume left */
  #define AK4531_RCD      0x07	/* CD volume right */
  #define AK4531_LLINE    0x08	/* LINE volume left */
  #define AK4531_RLINE    0x09	/* LINE volume right */
  #define AK4531_LAUXA    0x0a	/* AUXA volume left */
  #define AK4531_RAUXA    0x0b	/* AUXA volume right */
  #define AK4531_MONO1    0x0c	/* MONO1 volume left */
  #define AK4531_MONO2    0x0d	/* MONO1 volume right */
  #define AK4531_MIC      0x0e	/* MIC volume */
  #define AK4531_MONO_OUT 0x0f	/* Mono-out volume */
  #define AK4531_OUT_SW1  0x10	/* Output mixer switch 1 */
  #define AK4531_OUT_SW2  0x11	/* Output mixer switch 2 */
  #define AK4531_LIN_SW1  0x12	/* Input left mixer switch 1 */
  #define AK4531_RIN_SW1  0x13	/* Input right mixer switch 1 */
  #define AK4531_LIN_SW2  0x14	/* Input left mixer switch 2 */
  #define AK4531_RIN_SW2  0x15	/* Input right mixer switch 2 */
  #define AK4531_RESET    0x16	/* Reset & power down */
  #define AK4531_CLOCK    0x17	/* Clock select */
  #define AK4531_AD_IN    0x18	/* AD input select */
  #define AK4531_MIC_GAIN 0x19	/* MIC amplified gain */

  struct snd_ak4531 {
  	void (*write) (struct snd_ak4531 *ak4531, unsigned short reg,
  		       unsigned short val);

  	void *private_data;

  	void (*private_free) (struct snd_ak4531 *ak4531);

  	/* --- */
  	unsigned char regs[0x20];

  	struct mutex reg_mutex;

  };

  int snd_ak4531_mixer(struct snd_card *card, struct snd_ak4531 *_ak4531,
  		     struct snd_ak4531 **rak4531);

  #ifdef CONFIG_PM
  void snd_ak4531_suspend(struct snd_ak4531 *ak4531);
  void snd_ak4531_resume(struct snd_ak4531 *ak4531);
  #endif

  #endif /* __SOUND_AK4531_CODEC_H */