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Chaithrika U Sbe461ba2009-05-28 05:10:50 -04001/*
2 * ALSA SoC SPDIF DIT driver
3 *
4 * This driver is used by controllers which can operate in DIT (SPDI/F) where
5 * no codec is needed. This file provides stub codec that can be used
6 * in these configurations. TI DaVinci Audio controller uses this driver.
7 *
8 * Author: Steve Chen, <schen@mvista.com>
9 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
10 * Copyright: (C) 2009 Texas Instruments, India
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/module.h>
18#include <linux/moduleparam.h>
Mark Brown37a5ddf2010-05-31 13:47:26 +010019#include <linux/slab.h>
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040020#include <sound/soc.h>
21#include <sound/pcm.h>
Seungwhan Youn3a642912010-05-27 18:13:48 +090022#include <sound/initval.h>
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040023
Stephen Warren6ae759e2011-05-19 17:44:46 -060024#define DRV_NAME "spdif-dit"
Kevin Hilman0a0cf582009-07-13 14:50:40 -070025
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040026#define STUB_RATES SNDRV_PCM_RATE_8000_96000
27#define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
28
Seungwhan Youn3a642912010-05-27 18:13:48 +090029
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000030static struct snd_soc_codec_driver soc_codec_spdif_dit;
Seungwhan Youn3a642912010-05-27 18:13:48 +090031
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000032static struct snd_soc_dai_driver dit_stub_dai = {
33 .name = "dit-hifi",
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040034 .playback = {
35 .stream_name = "Playback",
36 .channels_min = 1,
37 .channels_max = 384,
38 .rates = STUB_RATES,
39 .formats = STUB_FORMATS,
40 },
41};
42
43static int spdif_dit_probe(struct platform_device *pdev)
44{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000045 return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
46 &dit_stub_dai, 1);
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040047}
48
49static int spdif_dit_remove(struct platform_device *pdev)
50{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000051 snd_soc_unregister_codec(&pdev->dev);
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040052 return 0;
53}
54
55static struct platform_driver spdif_dit_driver = {
56 .probe = spdif_dit_probe,
57 .remove = spdif_dit_remove,
58 .driver = {
Stephen Warren6ae759e2011-05-19 17:44:46 -060059 .name = DRV_NAME,
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040060 .owner = THIS_MODULE,
61 },
62};
63
Mark Brown5bbcc3c2011-11-23 22:52:08 +000064module_platform_driver(spdif_dit_driver);
Chaithrika U Sbe461ba2009-05-28 05:10:50 -040065
Stephen Warren6ae759e2011-05-19 17:44:46 -060066MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
67MODULE_DESCRIPTION("SPDIF dummy codec driver");
68MODULE_LICENSE("GPL");
69MODULE_ALIAS("platform:" DRV_NAME);