xref: /openbmc/linux/sound/soc/codecs/gtm601.c (revision 33b179e7)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * This is a simple driver for the GTM601 Voice PCM interface
4  *
5  * Copyright (C) 2015 Goldelico GmbH
6  *
7  * Author: Marek Belisko <marek@goldelico.com>
8  *
9  * Based on wm8727.c driver
10  */
11 
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/of_device.h>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/initval.h>
20 #include <sound/soc.h>
21 
22 static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = {
23 	SND_SOC_DAPM_OUTPUT("AOUT"),
24 	SND_SOC_DAPM_INPUT("AIN"),
25 };
26 
27 static const struct snd_soc_dapm_route gtm601_dapm_routes[] = {
28 	{ "AOUT", NULL, "Playback" },
29 	{ "Capture", NULL, "AIN" },
30 };
31 
32 static struct snd_soc_dai_driver gtm601_dai = {
33 	.name = "gtm601",
34 	.playback = {
35 		.stream_name = "Playback",
36 		.channels_min = 1,
37 		.channels_max = 1,
38 		.rates = SNDRV_PCM_RATE_8000,
39 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
40 		},
41 	.capture = {
42 		.stream_name = "Capture",
43 		.channels_min = 1,
44 		.channels_max = 1,
45 		.rates = SNDRV_PCM_RATE_8000,
46 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
47 	},
48 };
49 
50 static struct snd_soc_dai_driver bm818_dai = {
51 	.name = "bm818",
52 	.playback = {
53 		.stream_name = "Playback",
54 		.channels_min = 2,
55 		.channels_max = 2,
56 		.rates = SNDRV_PCM_RATE_48000,
57 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
58 	},
59 	.capture = {
60 		.stream_name = "Capture",
61 		.channels_min = 2,
62 		.channels_max = 2,
63 		.rates = SNDRV_PCM_RATE_48000,
64 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
65 	},
66 };
67 
68 static const struct snd_soc_component_driver soc_component_dev_gtm601 = {
69 	.dapm_widgets		= gtm601_dapm_widgets,
70 	.num_dapm_widgets	= ARRAY_SIZE(gtm601_dapm_widgets),
71 	.dapm_routes		= gtm601_dapm_routes,
72 	.num_dapm_routes	= ARRAY_SIZE(gtm601_dapm_routes),
73 	.idle_bias_on		= 1,
74 	.use_pmdown_time	= 1,
75 	.endianness		= 1,
76 };
77 
gtm601_platform_probe(struct platform_device * pdev)78 static int gtm601_platform_probe(struct platform_device *pdev)
79 {
80 	const struct snd_soc_dai_driver *dai_driver;
81 
82 	dai_driver = of_device_get_match_data(&pdev->dev);
83 
84 	return devm_snd_soc_register_component(&pdev->dev,
85 			&soc_component_dev_gtm601,
86 			(struct snd_soc_dai_driver *)dai_driver, 1);
87 }
88 
89 static const struct of_device_id gtm601_codec_of_match[] __maybe_unused = {
90 	{ .compatible = "option,gtm601", .data = (void *)&gtm601_dai },
91 	{ .compatible = "broadmobi,bm818", .data = (void *)&bm818_dai },
92 	{},
93 };
94 MODULE_DEVICE_TABLE(of, gtm601_codec_of_match);
95 
96 static struct platform_driver gtm601_codec_driver = {
97 	.driver = {
98 		.name = "gtm601",
99 		.of_match_table = of_match_ptr(gtm601_codec_of_match),
100 	},
101 	.probe = gtm601_platform_probe,
102 };
103 
104 module_platform_driver(gtm601_codec_driver);
105 
106 MODULE_DESCRIPTION("ASoC gtm601 driver");
107 MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>");
108 MODULE_LICENSE("GPL");
109 MODULE_ALIAS("platform:gtm601");
110