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.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
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 *)>m601_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
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