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 <linux/module.h>
25 #include <sound/core.h>
26 #include <sound/pcm.h>
27 #include <sound/soc.h>
28 #include <sound/soc-dapm.h>
29
30 static struct snd_soc_dai_driver dmic_dai = {
31 .name = "dmic-hifi",
32 .capture = {
33 .stream_name = "Capture",
34 .channels_min = 1,
35 .channels_max = 8,
36 .rates = SNDRV_PCM_RATE_CONTINUOUS,
37 .formats = SNDRV_PCM_FMTBIT_S32_LE
38 | SNDRV_PCM_FMTBIT_S24_LE
39 | SNDRV_PCM_FMTBIT_S16_LE,
40 },
41 };
42
43 static const struct snd_soc_dapm_widget dmic_dapm_widgets[] = {
44 SND_SOC_DAPM_AIF_OUT("DMIC AIF", "Capture", 0,
45 SND_SOC_NOPM, 0, 0),
46 SND_SOC_DAPM_INPUT("DMic"),
47 };
48
49 static const struct snd_soc_dapm_route intercon[] = {
50 {"DMIC AIF", NULL, "DMic"},
51 };
52
53 static struct snd_soc_codec_driver soc_dmic = {
54 .component_driver = {
55 .dapm_widgets = dmic_dapm_widgets,
56 .num_dapm_widgets = ARRAY_SIZE(dmic_dapm_widgets),
57 .dapm_routes = intercon,
58 .num_dapm_routes = ARRAY_SIZE(intercon),
59 },
60 };
61
dmic_dev_probe(struct platform_device * pdev)62 static int dmic_dev_probe(struct platform_device *pdev)
63 {
64 return snd_soc_register_codec(&pdev->dev,
65 &soc_dmic, &dmic_dai, 1);
66 }
67
dmic_dev_remove(struct platform_device * pdev)68 static int dmic_dev_remove(struct platform_device *pdev)
69 {
70 snd_soc_unregister_codec(&pdev->dev);
71 return 0;
72 }
73
74 MODULE_ALIAS("platform:dmic-codec");
75
76 static struct platform_driver dmic_driver = {
77 .driver = {
78 .name = "dmic-codec",
79 },
80 .probe = dmic_dev_probe,
81 .remove = dmic_dev_remove,
82 };
83
84 module_platform_driver(dmic_driver);
85
86 MODULE_DESCRIPTION("Generic DMIC driver");
87 MODULE_AUTHOR("Liam Girdwood <lrg@slimlogic.co.uk>");
88 MODULE_LICENSE("GPL");
89