xref: /openbmc/linux/sound/soc/codecs/dmic.c (revision 4800cd83)
1 /*
2  * dmic.c  --  SoC audio for Generic Digital MICs
3  *
4  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * version 2 as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18  * 02110-1301 USA
19  *
20  */
21 
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.h>
28 
29 static struct snd_soc_dai_driver dmic_dai = {
30 	.name = "dmic-hifi",
31 	.capture = {
32 		.stream_name = "Capture",
33 		.channels_min = 1,
34 		.channels_max = 8,
35 		.rates = SNDRV_PCM_RATE_CONTINUOUS,
36 		.formats = SNDRV_PCM_FMTBIT_S32_LE
37 			| SNDRV_PCM_FMTBIT_S24_LE
38 			| SNDRV_PCM_FMTBIT_S16_LE,
39 	},
40 };
41 
42 static struct snd_soc_codec_driver soc_dmic = {};
43 
44 static int __devinit dmic_dev_probe(struct platform_device *pdev)
45 {
46 	return snd_soc_register_codec(&pdev->dev,
47 			&soc_dmic, &dmic_dai, 1);
48 }
49 
50 static int __devexit dmic_dev_remove(struct platform_device *pdev)
51 {
52 	snd_soc_unregister_codec(&pdev->dev);
53 	return 0;
54 }
55 
56 MODULE_ALIAS("platform:dmic-codec");
57 
58 static struct platform_driver dmic_driver = {
59 	.driver = {
60 		.name = "dmic-codec",
61 		.owner = THIS_MODULE,
62 	},
63 	.probe = dmic_dev_probe,
64 	.remove = __devexit_p(dmic_dev_remove),
65 };
66 
67 static int __init dmic_init(void)
68 {
69 	return platform_driver_register(&dmic_driver);
70 }
71 module_init(dmic_init);
72 
73 static void __exit dmic_exit(void)
74 {
75 	platform_driver_unregister(&dmic_driver);
76 }
77 module_exit(dmic_exit);
78 
79 MODULE_DESCRIPTION("Generic DMIC driver");
80 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
81 MODULE_LICENSE("GPL");
82