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- /*
- * 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 <linux/slab.h>
- #include <sound/soc.h>
- #include <sound/pcm.h>
- #include <sound/initval.h>
- #include "spdif_transciever.h"
- 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 = {
- .stream_name = "Playback",
- .channels_min = 1,
- .channels_max = 384,
- .rates = STUB_RATES,
- .formats = STUB_FORMATS,
- },
- };
- 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;
- 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;
- }
- 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);
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