sound/soc/blackfin/bf5xx-ac97.h

   1 /*
   2  * linux/sound/arm/bf5xx-ac97.h
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #ifndef _BF5XX_AC97_H
  10 #define _BF5XX_AC97_H
  11
  12 extern struct snd_ac97_bus_ops bf5xx_ac97_ops;
  13 extern struct snd_ac97 *ac97;
  14 /* Frame format in memory, only support stereo currently */
  15 struct ac97_frame {
  16         u16 ac97_tag;           /* slot 0 */
  17         u16 ac97_addr;          /* slot 1 */
  18         u16 ac97_data;          /* slot 2 */
  19         u32 ac97_pcm;           /* slot 3 and 4: left and right pcm data */
  20 } __attribute__ ((packed));
  21
  22 #define TAG_VALID               0x8000
  23 #define TAG_CMD                 0x6000
  24 #define TAG_PCM_LEFT            0x1000
  25 #define TAG_PCM_RIGHT           0x0800
  26 #define TAG_PCM                 (TAG_PCM_LEFT | TAG_PCM_RIGHT)
  27
  28 extern struct snd_soc_dai bfin_ac97_dai;
  29
  30 void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u32 *src, \
  31                 size_t count);
  32
  33 void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u32 *dst, \
  34                 size_t count);
  35
  36 #endif