ASoC: spdif: Add S32_LE support for S/PDIF dummy codec drivers
[muen/linux.git] / sound / soc / codecs / spdif_transmitter.c
1 /*
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>
19 #include <linux/slab.h>
20 #include <sound/soc.h>
21 #include <sound/pcm.h>
22 #include <sound/initval.h>
23 #include <linux/of.h>
24
25 #define DRV_NAME "spdif-dit"
26
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)
32
33 static const struct snd_soc_dapm_widget dit_widgets[] = {
34         SND_SOC_DAPM_OUTPUT("spdif-out"),
35 };
36
37 static const struct snd_soc_dapm_route dit_routes[] = {
38         { "spdif-out", NULL, "Playback" },
39 };
40
41 static struct snd_soc_codec_driver soc_codec_spdif_dit = {
42         .component_driver = {
43                 .dapm_widgets           = dit_widgets,
44                 .num_dapm_widgets       = ARRAY_SIZE(dit_widgets),
45                 .dapm_routes            = dit_routes,
46                 .num_dapm_routes        = ARRAY_SIZE(dit_routes),
47         },
48 };
49
50 static struct snd_soc_dai_driver dit_stub_dai = {
51         .name           = "dit-hifi",
52         .playback       = {
53                 .stream_name    = "Playback",
54                 .channels_min   = 1,
55                 .channels_max   = 384,
56                 .rates          = STUB_RATES,
57                 .formats        = STUB_FORMATS,
58         },
59 };
60
61 static int spdif_dit_probe(struct platform_device *pdev)
62 {
63         return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
64                         &dit_stub_dai, 1);
65 }
66
67 static int spdif_dit_remove(struct platform_device *pdev)
68 {
69         snd_soc_unregister_codec(&pdev->dev);
70         return 0;
71 }
72
73 #ifdef CONFIG_OF
74 static const struct of_device_id spdif_dit_dt_ids[] = {
75         { .compatible = "linux,spdif-dit", },
76         { }
77 };
78 MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids);
79 #endif
80
81 static struct platform_driver spdif_dit_driver = {
82         .probe          = spdif_dit_probe,
83         .remove         = spdif_dit_remove,
84         .driver         = {
85                 .name   = DRV_NAME,
86                 .of_match_table = of_match_ptr(spdif_dit_dt_ids),
87         },
88 };
89
90 module_platform_driver(spdif_dit_driver);
91
92 MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
93 MODULE_DESCRIPTION("SPDIF dummy codec driver");
94 MODULE_LICENSE("GPL");
95 MODULE_ALIAS("platform:" DRV_NAME);