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ASoC: Add dummy S/PDIF codec support

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McASP on DM646x can operate in DIT (S/PDIF) where no codec is needed.
This patch provides stub codec that can be used in these configurations.
On DM646x EVM the McASP1 is connected to the S/PDIF out.

Signed-off-by: Steve Chen <schen@mvista.com>
Signed-off-by: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Signed-off-by: Naresh Medisetty <naresh@ti.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Chaithrika U S
2009-05-28 05:10:50 -04:00
committed by Mark Brown
parent 449bd54dcb
commit be461ba836
4 changed files with 92 additions and 0 deletions
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4
sound/soc/codecs/Kconfig
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@@ -18,6 +18,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_AK4535 if I2C select SND_SOC_AK4535 if I2C
select SND_SOC_CS4270 if I2C select SND_SOC_CS4270 if I2C
select SND_SOC_PCM3008 select SND_SOC_PCM3008
select SND_SOC_SPDIF
select SND_SOC_SSM2602 if I2C select SND_SOC_SSM2602 if I2C
select SND_SOC_STAC9766 if SND_SOC_AC97_BUS select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
select SND_SOC_TLV320AIC23 if I2C select SND_SOC_TLV320AIC23 if I2C
@@ -91,6 +92,9 @@ config SND_SOC_L3
config SND_SOC_PCM3008 config SND_SOC_PCM3008
tristate tristate
config SND_SOC_SPDIF
tristate
config SND_SOC_SSM2602 config SND_SOC_SSM2602
tristate tristate

2
sound/soc/codecs/Makefile
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@@ -6,6 +6,7 @@ snd-soc-ak4535-objs := ak4535.o
snd-soc-cs4270-objs := cs4270.o snd-soc-cs4270-objs := cs4270.o
snd-soc-l3-objs := l3.o snd-soc-l3-objs := l3.o
snd-soc-pcm3008-objs := pcm3008.o snd-soc-pcm3008-objs := pcm3008.o
snd-soc-spdif-objs := spdif_transciever.o
snd-soc-ssm2602-objs := ssm2602.o snd-soc-ssm2602-objs := ssm2602.o
snd-soc-stac9766-objs := stac9766.o snd-soc-stac9766-objs := stac9766.o
snd-soc-tlv320aic23-objs := tlv320aic23.o snd-soc-tlv320aic23-objs := tlv320aic23.o
@@ -42,6 +43,7 @@ obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o
obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o
obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o
obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif.o
obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
obj-$(CONFIG_SND_SOC_STAC9766) += snd-soc-stac9766.o obj-$(CONFIG_SND_SOC_STAC9766) += snd-soc-stac9766.o
obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o

69
sound/soc/codecs/spdif_transciever.c Normal file
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@@ -0,0 +1,69 @@
/*
* ALSA SoC SPDIF DIT driver
*
* This driver is used by controllers which can operate in DIT (SPDI/F) where
* no codec is needed. This file provides stub codec that can be used
* in these configurations. TI DaVinci Audio controller uses this driver.
*
* Author: Steve Chen, <schen@mvista.com>
* Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
* Copyright: (C) 2009 Texas Instruments, India
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#define STUB_RATES SNDRV_PCM_RATE_8000_96000
#define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
struct snd_soc_dai dit_stub_dai = {
.name = "DIT",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 384,
.rates = STUB_RATES,
.formats = STUB_FORMATS,
},
};
static int spdif_dit_probe(struct platform_device *pdev)
{
return snd_soc_register_dai(&dit_stub_dai);
}
static int spdif_dit_remove(struct platform_device *pdev)
{
snd_soc_unregister_dai(&dit_stub_dai);
return 0;
}
static struct platform_driver spdif_dit_driver = {
.probe = spdif_dit_probe,
.remove = spdif_dit_remove,
.driver = {
.name = "spdif-dit",
.owner = THIS_MODULE,
},
};
static int __init dit_modinit(void)
{
return platform_driver_register(&spdif_dit_driver);
}
static void __exit dit_exit(void)
{
platform_driver_unregister(&spdif_dit_driver);
}
module_init(dit_modinit);
module_exit(dit_exit);

17
sound/soc/codecs/spdif_transciever.h Normal file
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@@ -0,0 +1,17 @@
/*
* ALSA SoC DIT/DIR driver header
*
* Author: Steve Chen, <schen@mvista.com>
* Copyright: (C) 2008 MontaVista Software, Inc., <source@mvista.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef CODEC_STUBS_H
#define CODEC_STUBS_H
extern struct snd_soc_dai dit_stub_dai;
#endif /* CODEC_STUBS_H */