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bf5xx-ac97.h
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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