sound/soc/blackfin/bf5xx-ac97.h

   1 /*
   2  * sound/soc/blackfin/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 /* Frame format in memory, only support stereo currently */
  13 struct ac97_frame {
  14         u16 ac97_tag;           /* slot 0 */
  15         u16 ac97_addr;          /* slot 1 */
  16         u16 ac97_data;          /* slot 2 */
  17         u16 ac97_pcm_l;         /*slot 3:front left*/
  18         u16 ac97_pcm_r;         /*slot 4:front left*/
  19 #if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
  20         u16 ac97_mdm_l1;
  21         u16 ac97_center;        /*slot 6:center*/
  22         u16 ac97_sl;            /*slot 7:surround left*/
  23         u16 ac97_sr;            /*slot 8:surround right*/
  24         u16 ac97_lfe;           /*slot 9:lfe*/
  25 #endif
  26 } __attribute__ ((packed));
  27
  28 /* Speaker location */
  29 #define SP_FL           0x0001
  30 #define SP_FR           0x0010
  31 #define SP_FC           0x0002
  32 #define SP_LFE          0x0020
  33 #define SP_SL           0x0004
  34 #define SP_SR           0x0040
  35
  36 #define SP_STEREO       (SP_FL | SP_FR)
  37 #define SP_2DOT1        (SP_FL | SP_FR | SP_LFE)
  38 #define SP_QUAD         (SP_FL | SP_FR | SP_SL | SP_SR)
  39 #define SP_5DOT1        (SP_FL | SP_FR | SP_FC | SP_LFE | SP_SL | SP_SR)
  40
  41 #define TAG_VALID               0x8000
  42 #define TAG_CMD                 0x6000
  43 #define TAG_PCM_LEFT            0x1000
  44 #define TAG_PCM_RIGHT           0x0800
  45 #define TAG_PCM_MDM_L1          0x0400
  46 #define TAG_PCM_CENTER          0x0200
  47 #define TAG_PCM_SL              0x0100
  48 #define TAG_PCM_SR              0x0080
  49 #define TAG_PCM_LFE             0x0040
  50
  51 void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src, \
  52                 size_t count, unsigned int chan_mask);
  53
  54 void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst, \
  55                 size_t count);
  56
  57 #endif