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 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         u16 ac97_pcm_l;         /*slot 3:front left*/
  20         u16 ac97_pcm_r;         /*slot 4:front left*/
  21 #if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
  22         u16 ac97_mdm_l1;
  23         u16 ac97_center;        /*slot 6:center*/
  24         u16 ac97_sl;            /*slot 7:surround left*/
  25         u16 ac97_sr;            /*slot 8:surround right*/
  26         u16 ac97_lfe;           /*slot 9:lfe*/
  27 #endif
  28 } __attribute__ ((packed));
  29
  30 /* Speaker location */
  31 #define SP_FL           0x0001
  32 #define SP_FR           0x0010
  33 #define SP_FC           0x0002
  34 #define SP_LFE          0x0020
  35 #define SP_SL           0x0004
  36 #define SP_SR           0x0040
  37
  38 #define SP_STEREO       (SP_FL | SP_FR)
  39 #define SP_2DOT1        (SP_FL | SP_FR | SP_LFE)
  40 #define SP_QUAD         (SP_FL | SP_FR | SP_SL | SP_SR)
  41 #define SP_5DOT1        (SP_FL | SP_FR | SP_FC | SP_LFE | SP_SL | SP_SR)
  42
  43 #define TAG_VALID               0x8000
  44 #define TAG_CMD                 0x6000
  45 #define TAG_PCM_LEFT            0x1000
  46 #define TAG_PCM_RIGHT           0x0800
  47 #define TAG_PCM_MDM_L1          0x0400
  48 #define TAG_PCM_CENTER          0x0200
  49 #define TAG_PCM_SL              0x0100
  50 #define TAG_PCM_SR              0x0080
  51 #define TAG_PCM_LFE             0x0040
  52
  53 void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src, \
  54                 size_t count, unsigned int chan_mask);
  55
  56 void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst, \
  57                 size_t count);
  58
  59 #endif