2 * ALSA SoC SPDIF DIT driver
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.
8 * Author: Steve Chen, <schen@mvista.com>
9 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
10 * Copyright: (C) 2009 Texas Instruments, India
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.
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/slab.h>
20 #include <sound/soc.h>
21 #include <sound/pcm.h>
22 #include <sound/initval.h>
25 #define DRV_NAME "spdif-dit"
27 #define STUB_RATES SNDRV_PCM_RATE_8000_192000
28 #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
29 SNDRV_PCM_FMTBIT_S20_3LE | \
30 SNDRV_PCM_FMTBIT_S24_LE | \
31 SNDRV_PCM_FMTBIT_S32_LE)
33 static const struct snd_soc_dapm_widget dit_widgets
[] = {
34 SND_SOC_DAPM_OUTPUT("spdif-out"),
37 static const struct snd_soc_dapm_route dit_routes
[] = {
38 { "spdif-out", NULL
, "Playback" },
41 static struct snd_soc_component_driver soc_codec_spdif_dit
= {
42 .dapm_widgets
= dit_widgets
,
43 .num_dapm_widgets
= ARRAY_SIZE(dit_widgets
),
44 .dapm_routes
= dit_routes
,
45 .num_dapm_routes
= ARRAY_SIZE(dit_routes
),
49 .non_legacy_dai_naming
= 1,
52 static struct snd_soc_dai_driver dit_stub_dai
= {
55 .stream_name
= "Playback",
59 .formats
= STUB_FORMATS
,
63 static int spdif_dit_probe(struct platform_device
*pdev
)
65 return devm_snd_soc_register_component(&pdev
->dev
,
71 static const struct of_device_id spdif_dit_dt_ids
[] = {
72 { .compatible
= "linux,spdif-dit", },
75 MODULE_DEVICE_TABLE(of
, spdif_dit_dt_ids
);
78 static struct platform_driver spdif_dit_driver
= {
79 .probe
= spdif_dit_probe
,
82 .of_match_table
= of_match_ptr(spdif_dit_dt_ids
),
86 module_platform_driver(spdif_dit_driver
);
88 MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
89 MODULE_DESCRIPTION("SPDIF dummy codec driver");
90 MODULE_LICENSE("GPL");
91 MODULE_ALIAS("platform:" DRV_NAME
);