blob: e3501f40c7b3d866f965131e64ce2ae1227e1b77 [file] [log] [blame]
Vipin Kumarcdf60522012-06-28 12:31:37 +05301/*
2 * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
3 *
4 * Based on ALSA SoC SPDIF DIT driver
5 *
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.
9 *
10 * Author: Vipin Kumar, <vipin.kumar@st.com>
11 * Copyright: (C) 2012 ST Microelectronics
12 *
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.
16 */
17
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>
Marek Beliskof9c8ba82013-04-25 15:13:14 +020024#include <linux/of.h>
Vipin Kumarcdf60522012-06-28 12:31:37 +053025
Mark Brown2f6e3ba2013-08-19 12:09:39 +010026static const struct snd_soc_dapm_widget dir_widgets[] = {
27 SND_SOC_DAPM_INPUT("spdif-in"),
28};
29
30static const struct snd_soc_dapm_route dir_routes[] = {
31 { "Capture", NULL, "spdif-in" },
32};
33
Vipin Kumarcdf60522012-06-28 12:31:37 +053034#define STUB_RATES SNDRV_PCM_RATE_8000_192000
35#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
Nicolin Chendb5ff952013-07-31 20:07:05 +080036 SNDRV_PCM_FMTBIT_S20_3LE | \
37 SNDRV_PCM_FMTBIT_S24_LE | \
Vipin Kumarcdf60522012-06-28 12:31:37 +053038 SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
39
Mark Brown2f6e3ba2013-08-19 12:09:39 +010040static struct snd_soc_codec_driver soc_codec_spdif_dir = {
41 .dapm_widgets = dir_widgets,
42 .num_dapm_widgets = ARRAY_SIZE(dir_widgets),
43 .dapm_routes = dir_routes,
44 .num_dapm_routes = ARRAY_SIZE(dir_routes),
45};
Vipin Kumarcdf60522012-06-28 12:31:37 +053046
47static struct snd_soc_dai_driver dir_stub_dai = {
48 .name = "dir-hifi",
49 .capture = {
50 .stream_name = "Capture",
51 .channels_min = 1,
52 .channels_max = 384,
53 .rates = STUB_RATES,
54 .formats = STUB_FORMATS,
55 },
56};
57
58static int spdif_dir_probe(struct platform_device *pdev)
59{
60 return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir,
61 &dir_stub_dai, 1);
62}
63
64static int spdif_dir_remove(struct platform_device *pdev)
65{
66 snd_soc_unregister_codec(&pdev->dev);
67 return 0;
68}
69
Marek Beliskof9c8ba82013-04-25 15:13:14 +020070#ifdef CONFIG_OF
71static const struct of_device_id spdif_dir_dt_ids[] = {
72 { .compatible = "linux,spdif-dir", },
73 { }
74};
75MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
76#endif
77
Vipin Kumarcdf60522012-06-28 12:31:37 +053078static struct platform_driver spdif_dir_driver = {
79 .probe = spdif_dir_probe,
80 .remove = spdif_dir_remove,
81 .driver = {
82 .name = "spdif-dir",
83 .owner = THIS_MODULE,
Marek Beliskof9c8ba82013-04-25 15:13:14 +020084 .of_match_table = of_match_ptr(spdif_dir_dt_ids),
Vipin Kumarcdf60522012-06-28 12:31:37 +053085 },
86};
87
88module_platform_driver(spdif_dir_driver);
89
90MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
91MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
92MODULE_LICENSE("GPL");