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
24 #define DRV_NAME "spdif-dit"
25
26 #define STUB_RATES SNDRV_PCM_RATE_8000_96000
27 #define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE
28
29
30 static struct snd_soc_codec_driver soc_codec_spdif_dit;
31
32 static struct snd_soc_dai_driver dit_stub_dai = {
33 .name = "dit-hifi",
34 .playback = {
35 .stream_name = "Playback",
36 .channels_min = 1,
37 .channels_max = 384,
38 .rates = STUB_RATES,
39 .formats = STUB_FORMATS,
40 },
41 };
42
spdif_dit_probe(struct platform_device * pdev)43 static int spdif_dit_probe(struct platform_device *pdev)
44 {
45 return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit,
46 &dit_stub_dai, 1);
47 }
48
spdif_dit_remove(struct platform_device * pdev)49 static int spdif_dit_remove(struct platform_device *pdev)
50 {
51 snd_soc_unregister_codec(&pdev->dev);
52 return 0;
53 }
54
55 static struct platform_driver spdif_dit_driver = {
56 .probe = spdif_dit_probe,
57 .remove = spdif_dit_remove,
58 .driver = {
59 .name = DRV_NAME,
60 .owner = THIS_MODULE,
61 },
62 };
63
64 module_platform_driver(spdif_dit_driver);
65
66 MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
67 MODULE_DESCRIPTION("SPDIF dummy codec driver");
68 MODULE_LICENSE("GPL");
69 MODULE_ALIAS("platform:" DRV_NAME);
70