2 * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
4 * Based on ALSA SoC SPDIF DIT driver
6 * This driver is used by controllers which can operate in DIR (SPDI/F) where
7 * no codec is needed. This file provides stub codec that can be used
8 * in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
10 * Author: Vipin Kumar, <vipin.kumar@st.com>
11 * Copyright: (C) 2012 ST Microelectronics
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/slab.h>
21 #include <sound/soc.h>
22 #include <sound/pcm.h>
23 #include <sound/initval.h>
26 static const struct snd_soc_dapm_widget dir_widgets[] = {
27 SND_SOC_DAPM_INPUT("spdif-in"),
30 static const struct snd_soc_dapm_route dir_routes[] = {
31 { "Capture", NULL, "spdif-in" },
34 #define STUB_RATES SNDRV_PCM_RATE_8000_192000
35 #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
36 SNDRV_PCM_FMTBIT_S20_3LE | \
37 SNDRV_PCM_FMTBIT_S24_LE | \
38 SNDRV_PCM_FMTBIT_S32_LE | \
39 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
41 static struct snd_soc_codec_driver soc_codec_spdif_dir = {
43 .dapm_widgets = dir_widgets,
44 .num_dapm_widgets = ARRAY_SIZE(dir_widgets),
45 .dapm_routes = dir_routes,
46 .num_dapm_routes = ARRAY_SIZE(dir_routes),
50 static struct snd_soc_dai_driver dir_stub_dai = {
53 .stream_name = "Capture",
57 .formats = STUB_FORMATS,
61 static int spdif_dir_probe(struct platform_device *pdev)
63 return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir,
67 static int spdif_dir_remove(struct platform_device *pdev)
69 snd_soc_unregister_codec(&pdev->dev);
74 static const struct of_device_id spdif_dir_dt_ids[] = {
75 { .compatible = "linux,spdif-dir", },
78 MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
81 static struct platform_driver spdif_dir_driver = {
82 .probe = spdif_dir_probe,
83 .remove = spdif_dir_remove,
86 .of_match_table = of_match_ptr(spdif_dir_dt_ids),
90 module_platform_driver(spdif_dir_driver);
92 MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
93 MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
94 MODULE_LICENSE("GPL");