67f854b910
This patch provides a option for users to enable multi-channel function support in Blackfin ASoC driver. Because Blackfin is without MMU, it is easy for us and the user to enable this function at compiling stage not dynamically on the fly. Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*
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* linux/sound/arm/bf5xx-ac97.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _BF5XX_AC97_H
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#define _BF5XX_AC97_H
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extern struct snd_ac97_bus_ops bf5xx_ac97_ops;
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extern struct snd_ac97 *ac97;
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/* Frame format in memory, only support stereo currently */
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struct ac97_frame {
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u16 ac97_tag; /* slot 0 */
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u16 ac97_addr; /* slot 1 */
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u16 ac97_data; /* slot 2 */
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u16 ac97_pcm_l; /*slot 3:front left*/
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u16 ac97_pcm_r; /*slot 4:front left*/
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#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
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u16 ac97_mdm_l1;
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u16 ac97_center; /*slot 6:center*/
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u16 ac97_sl; /*slot 7:surround left*/
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u16 ac97_sr; /*slot 8:surround right*/
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u16 ac97_lfe; /*slot 9:lfe*/
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#endif
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} __attribute__ ((packed));
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/* Speaker location */
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#define SP_FL 0x0001
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#define SP_FR 0x0010
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#define SP_FC 0x0002
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#define SP_LFE 0x0020
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#define SP_SL 0x0004
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#define SP_SR 0x0040
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#define SP_STEREO (SP_FL | SP_FR)
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#define SP_2DOT1 (SP_FL | SP_FR | SP_LFE)
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#define SP_QUAD (SP_FL | SP_FR | SP_SL | SP_SR)
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#define SP_5DOT1 (SP_FL | SP_FR | SP_FC | SP_LFE | SP_SL | SP_SR)
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#define TAG_VALID 0x8000
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#define TAG_CMD 0x6000
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#define TAG_PCM_LEFT 0x1000
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#define TAG_PCM_RIGHT 0x0800
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#define TAG_PCM_MDM_L1 0x0400
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#define TAG_PCM_CENTER 0x0200
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#define TAG_PCM_SL 0x0100
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#define TAG_PCM_SR 0x0080
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#define TAG_PCM_LFE 0x0040
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extern struct snd_soc_dai bfin_ac97_dai;
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void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src, \
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size_t count, unsigned int chan_mask);
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void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst, \
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size_t count);
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#endif
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