xref: /openbmc/linux/sound/soc/codecs/ads117x.c (revision a06c488d)
1 /*
2  * ads117x.c  --  Driver for ads1174/8 ADC chips
3  *
4  * Copyright 2009 ShotSpotter Inc.
5  * Author: Graeme Gregory <gg@slimlogic.co.uk>
6  *
7  *  This program is free software; you can redistribute  it and/or modify it
8  *  under  the terms of  the GNU General  Public License as published by the
9  *  Free Software Foundation;  either version 2 of the  License, or (at your
10  *  option) any later version.
11  */
12 
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/init.h>
16 #include <linux/device.h>
17 #include <linux/module.h>
18 #include <sound/core.h>
19 #include <sound/pcm.h>
20 #include <sound/initval.h>
21 #include <sound/soc.h>
22 
23 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000)
24 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
25 
26 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = {
27 SND_SOC_DAPM_INPUT("Input1"),
28 SND_SOC_DAPM_INPUT("Input2"),
29 SND_SOC_DAPM_INPUT("Input3"),
30 SND_SOC_DAPM_INPUT("Input4"),
31 SND_SOC_DAPM_INPUT("Input5"),
32 SND_SOC_DAPM_INPUT("Input6"),
33 SND_SOC_DAPM_INPUT("Input7"),
34 SND_SOC_DAPM_INPUT("Input8"),
35 };
36 
37 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = {
38 	{ "Capture", NULL, "Input1" },
39 	{ "Capture", NULL, "Input2" },
40 	{ "Capture", NULL, "Input3" },
41 	{ "Capture", NULL, "Input4" },
42 	{ "Capture", NULL, "Input5" },
43 	{ "Capture", NULL, "Input6" },
44 	{ "Capture", NULL, "Input7" },
45 	{ "Capture", NULL, "Input8" },
46 };
47 
48 static struct snd_soc_dai_driver ads117x_dai = {
49 /* ADC */
50 	.name = "ads117x-hifi",
51 	.capture = {
52 		.stream_name = "Capture",
53 		.channels_min = 1,
54 		.channels_max = 32,
55 		.rates = ADS117X_RATES,
56 		.formats = ADS117X_FORMATS,},
57 };
58 
59 static struct snd_soc_codec_driver soc_codec_dev_ads117x = {
60 	.dapm_widgets = ads117x_dapm_widgets,
61 	.num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets),
62 	.dapm_routes = ads117x_dapm_routes,
63 	.num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes),
64 };
65 
66 static int ads117x_probe(struct platform_device *pdev)
67 {
68 	return snd_soc_register_codec(&pdev->dev,
69 			&soc_codec_dev_ads117x, &ads117x_dai, 1);
70 }
71 
72 static int ads117x_remove(struct platform_device *pdev)
73 {
74 	snd_soc_unregister_codec(&pdev->dev);
75 	return 0;
76 }
77 
78 static struct platform_driver ads117x_codec_driver = {
79 	.driver = {
80 			.name = "ads117x-codec",
81 	},
82 
83 	.probe = ads117x_probe,
84 	.remove = ads117x_remove,
85 };
86 
87 module_platform_driver(ads117x_codec_driver);
88 
89 MODULE_DESCRIPTION("ASoC ads117x driver");
90 MODULE_AUTHOR("Graeme Gregory");
91 MODULE_LICENSE("GPL");
92