/*

   * sound/soc/blackfin/bf5xx-ac97.h

   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #ifndef _BF5XX_AC97_H
  #define _BF5XX_AC97_H
  
  extern struct snd_ac97_bus_ops bf5xx_ac97_ops;
  extern struct snd_ac97 *ac97;
  /* Frame format in memory, only support stereo currently */
  struct ac97_frame {
  	u16 ac97_tag;		/* slot 0 */
  	u16 ac97_addr;		/* slot 1 */
  	u16 ac97_data;		/* slot 2 */

  	u16 ac97_pcm_l;		/*slot 3:front left*/
  	u16 ac97_pcm_r;		/*slot 4:front left*/
  #if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
  	u16 ac97_mdm_l1;
  	u16 ac97_center;	/*slot 6:center*/
  	u16 ac97_sl;		/*slot 7:surround left*/
  	u16 ac97_sr;		/*slot 8:surround right*/
  	u16 ac97_lfe;		/*slot 9:lfe*/
  #endif

  } __attribute__ ((packed));

  /* Speaker location */
  #define SP_FL		0x0001
  #define SP_FR		0x0010
  #define SP_FC		0x0002
  #define SP_LFE		0x0020
  #define SP_SL		0x0004
  #define SP_SR		0x0040
  
  #define SP_STEREO	(SP_FL | SP_FR)
  #define SP_2DOT1	(SP_FL | SP_FR | SP_LFE)
  #define SP_QUAD		(SP_FL | SP_FR | SP_SL | SP_SR)
  #define SP_5DOT1	(SP_FL | SP_FR | SP_FC | SP_LFE | SP_SL | SP_SR)

  #define TAG_VALID		0x8000
  #define TAG_CMD			0x6000
  #define TAG_PCM_LEFT		0x1000
  #define TAG_PCM_RIGHT		0x0800

  #define TAG_PCM_MDM_L1		0x0400
  #define TAG_PCM_CENTER		0x0200
  #define TAG_PCM_SL		0x0100
  #define TAG_PCM_SR		0x0080
  #define TAG_PCM_LFE		0x0040

  void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src, \
  		size_t count, unsigned int chan_mask);

  void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst, \

  		size_t count);
  
  #endif