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/*
* tegra_generic_codec.c -- Generic codec interface for tegra
*
* Copyright 2011 Nvidia Graphics Pvt. Ltd.
*
* Author: Sumit Bhattacharya
* sumitb@nvidia.com
* http://www.nvidia.com
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "tegra_soc.h"
static struct snd_soc_codec* tegra_generic_codec;
static struct platform_device* tegra_generic_codec_dev;
// Stubbed implementations of generic codec ops
static int tegra_generic_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return 0;
}
static void tegra_generic_codec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return;
}
static int tegra_generic_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
return 0;
}
static int tegra_generic_codec_mute(struct snd_soc_dai *dai, int mute)
{
return 0;
}
static int tegra_generic_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
return 0;
}
static int tegra_generic_codec_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
return 0;
}
static struct snd_soc_dai_ops tegra_generic_codec_stub_ops = {
.startup = tegra_generic_codec_startup,
.shutdown = tegra_generic_codec_shutdown,
.hw_params = tegra_generic_codec_hw_params,
.digital_mute = tegra_generic_codec_mute,
.set_fmt = tegra_generic_codec_set_dai_fmt,
.set_sysclk = tegra_generic_codec_set_dai_sysclk,
};
struct snd_soc_dai tegra_generic_codec_dai[] = {
{
.name = "tegra_generic_voice_codec",
.id = 0,
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 1,
.rates = TEGRA_VOICE_SAMPLE_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 1,
.rates = TEGRA_VOICE_SAMPLE_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &tegra_generic_codec_stub_ops,
},
{
.name = "tegra_generic_spdif_codec",
.id = 1,
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = TEGRA_SAMPLE_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = TEGRA_SAMPLE_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &tegra_generic_codec_stub_ops,
}
};
EXPORT_SYMBOL_GPL(tegra_generic_codec_dai);
static int generic_codec_init(struct platform_device *pdev)
{
int i, ret = 0;
tegra_generic_codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (!tegra_generic_codec)
return -ENOMEM;
mutex_init(&tegra_generic_codec->mutex);
tegra_generic_codec->dev = &pdev->dev;
tegra_generic_codec->name = "tegra_generic_codec";
tegra_generic_codec->owner = THIS_MODULE;
tegra_generic_codec->dai = tegra_generic_codec_dai;
tegra_generic_codec->num_dai = ARRAY_SIZE(tegra_generic_codec_dai);
tegra_generic_codec->write = NULL;
tegra_generic_codec->read = NULL;
for (i = 0; i < tegra_generic_codec->num_dai; i++)
tegra_generic_codec_dai[i].dev = &pdev->dev;
INIT_LIST_HEAD(&tegra_generic_codec->dapm_widgets);
INIT_LIST_HEAD(&tegra_generic_codec->dapm_paths);
ret = snd_soc_register_codec(tegra_generic_codec);
if (ret != 0) {
pr_err("codec: failed to register tegra_generic_codec\n");
goto codec_err;
}
ret = snd_soc_register_dais(tegra_generic_codec_dai, ARRAY_SIZE(tegra_generic_codec_dai));
if (ret != 0) {
pr_err("codec: failed to register dais\n");
goto dai_err;
}
return ret;
dai_err:
snd_soc_unregister_codec(tegra_generic_codec);
codec_err:
kfree(tegra_generic_codec);
tegra_generic_codec = NULL;
return ret;
}
static int generic_codec_remove(struct platform_device *pdev)
{
int i;
if (!tegra_generic_codec)
return 0;
snd_soc_unregister_dais(tegra_generic_codec_dai, ARRAY_SIZE(tegra_generic_codec_dai));
snd_soc_unregister_codec(tegra_generic_codec);
kfree(tegra_generic_codec);
tegra_generic_codec = NULL;
for (i = 0; i < tegra_generic_codec->num_dai; i++)
tegra_generic_codec_dai[i].dev = NULL;
return 0;
}
static int __init tegra_generic_codec_init(void)
{
int ret = 0;
tegra_generic_codec_dev =
platform_device_register_simple("tegra_generic_codec", -1, NULL, 0);
if (!tegra_generic_codec_dev)
return -ENOMEM;
ret = generic_codec_init(tegra_generic_codec_dev);
if (ret != 0)
goto codec_err;
return 0;
codec_err:
platform_device_unregister(tegra_generic_codec_dev);
tegra_generic_codec_dev = 0;
return ret;
}
static void __exit tegra_generic_codec_exit(void)
{
generic_codec_remove(tegra_generic_codec_dev);
platform_device_unregister(tegra_generic_codec_dev);
tegra_generic_codec_dev = 0;
}
module_init(tegra_generic_codec_init);
module_exit(tegra_generic_codec_exit);
/* Module information */
MODULE_DESCRIPTION("Tegra ALSA Generic Codec Interface");
MODULE_LICENSE("GPL");
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