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
22static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = {
23	SND_SOC_DAPM_OUTPUT("AOUT"),
24	SND_SOC_DAPM_INPUT("AIN"),
25};
26
27static const struct snd_soc_dapm_route gtm601_dapm_routes[] = {
28	{ "AOUT", NULL, "Playback" },
29	{ "Capture", NULL, "AIN" },
30};
31
32static 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
50static 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
68static 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	.non_legacy_dai_naming	= 1,
77};
78
79static int gtm601_platform_probe(struct platform_device *pdev)
80{
81	const struct snd_soc_dai_driver *dai_driver;
82
83	dai_driver = of_device_get_match_data(&pdev->dev);
84
85	return devm_snd_soc_register_component(&pdev->dev,
86			&soc_component_dev_gtm601,
87			(struct snd_soc_dai_driver *)dai_driver, 1);
88}
89
90static const struct of_device_id gtm601_codec_of_match[] = {
91	{ .compatible = "option,gtm601", .data = (void *)&gtm601_dai },
92	{ .compatible = "broadmobi,bm818", .data = (void *)&bm818_dai },
93	{},
94};
95MODULE_DEVICE_TABLE(of, gtm601_codec_of_match);
96
97static struct platform_driver gtm601_codec_driver = {
98	.driver = {
99		.name = "gtm601",
100		.of_match_table = of_match_ptr(gtm601_codec_of_match),
101	},
102	.probe = gtm601_platform_probe,
103};
104
105module_platform_driver(gtm601_codec_driver);
106
107MODULE_DESCRIPTION("ASoC gtm601 driver");
108MODULE_AUTHOR("Marek Belisko <marek@goldelico.com>");
109MODULE_LICENSE("GPL");
110MODULE_ALIAS("platform:gtm601");
111