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ASoC: spdif: Add codec driver to use spdif stand-alone

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This patch adds spdif dummy codec driver for using spdif-dit as
a stand-alone. Until this, spdif-dit can be used only with other
codecs like tlv320aci3x in davinci platform.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Seungwhan Youn 2010-05-27 18:13:48 +09:00 committed by Mark Brown
parent e37c83c06c
commit 3a642915ad
1 changed files with 92 additions and 1 deletions
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93
sound/soc/codecs/spdif_transciever.c
View File

@ -18,6 +18,7 @@
#include <linux/moduleparam.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include "spdif_transciever.h"
@ -26,6 +27,48 @@ MODULE_LICENSE("GPL");
#define STUB_RATES SNDRV_PCM_RATE_8000_96000
#define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
static struct snd_soc_codec *spdif_dit_codec;
static int spdif_dit_codec_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret;
if (spdif_dit_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = spdif_dit_codec;
codec = spdif_dit_codec;
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
dev_err(codec->dev, "failed to create pcms: %d\n", ret);
goto err_create_pcms;
}
return 0;
err_create_pcms:
return ret;
}
static int spdif_dit_codec_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
snd_soc_free_pcms(socdev);
return 0;
}
struct snd_soc_codec_device soc_codec_dev_spdif_dit = {
.probe = spdif_dit_codec_probe,
.remove = spdif_dit_codec_remove,
}; EXPORT_SYMBOL_GPL(soc_codec_dev_spdif_dit);
struct snd_soc_dai dit_stub_dai = {
.name = "DIT",
.playback = {
@ -40,13 +83,61 @@ EXPORT_SYMBOL_GPL(dit_stub_dai);
static int spdif_dit_probe(struct platform_device *pdev)
{
struct snd_soc_codec *codec;
int ret;
if (spdif_dit_codec) {
dev_err(&pdev->dev, "Another Codec is registered\n");
ret = -EINVAL;
goto err_reg_codec;
}
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
codec->dev = &pdev->dev;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->name = "spdif-dit";
codec->owner = THIS_MODULE;
codec->dai = &dit_stub_dai;
codec->num_dai = 1;
spdif_dit_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
goto err_reg_codec;
}
dit_stub_dai.dev = &pdev->dev;
return snd_soc_register_dai(&dit_stub_dai);
ret = snd_soc_register_dai(&dit_stub_dai);
if (ret < 0) {
dev_err(codec->dev, "Failed to register dai: %d\n", ret);
goto err_reg_dai;
}
return 0;
err_reg_dai:
snd_soc_unregister_codec(codec);
err_reg_codec:
kfree(spdif_dit_codec);
return ret;
}
static int spdif_dit_remove(struct platform_device *pdev)
{
snd_soc_unregister_dai(&dit_stub_dai);
snd_soc_unregister_codec(spdif_dit_codec);
kfree(spdif_dit_codec);
spdif_dit_codec = NULL;
return 0;
}