summaryrefslogtreecommitdiffstats
path: root/sound/soc/mediatek/mt2701/mt2701-wm8960.c
blob: a08ce2323bdc003b85ccda00ac42c51cd5419ce5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
/*
 * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
 *
 * Copyright (c) 2017 MediaTek Inc.
 * Author: Ryder Lee <ryder.lee@mediatek.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <sound/soc.h>

#include "mt2701-afe-common.h"

static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("AMIC", NULL),
};

static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("AMIC"),
};

static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
					  struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	unsigned int mclk_rate;
	unsigned int rate = params_rate(params);
	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
	unsigned int div_bck_over_lrck = 64;

	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;

	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);

	return 0;
}

static struct snd_soc_ops mt2701_wm8960_be_ops = {
	.hw_params = mt2701_wm8960_be_ops_hw_params
};

static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
	/* FE */
	{
		.name = "wm8960-playback",
		.stream_name = "wm8960-playback",
		.cpu_dai_name = "PCMO0",
		.codec_name = "snd-soc-dummy",
		.codec_dai_name = "snd-soc-dummy-dai",
		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
			    SND_SOC_DPCM_TRIGGER_POST},
		.dynamic = 1,
		.dpcm_playback = 1,
	},
	{
		.name = "wm8960-capture",
		.stream_name = "wm8960-capture",
		.cpu_dai_name = "PCM0",
		.codec_name = "snd-soc-dummy",
		.codec_dai_name = "snd-soc-dummy-dai",
		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
			    SND_SOC_DPCM_TRIGGER_POST},
		.dynamic = 1,
		.dpcm_capture = 1,
	},
	/* BE */
	{
		.name = "wm8960-codec",
		.cpu_dai_name = "I2S0",
		.no_pcm = 1,
		.codec_dai_name = "wm8960-hifi",
		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
			| SND_SOC_DAIFMT_GATED,
		.ops = &mt2701_wm8960_be_ops,
		.dpcm_playback = 1,
		.dpcm_capture = 1,
	},
};

static struct snd_soc_card mt2701_wm8960_card = {
	.name = "mt2701-wm8960",
	.owner = THIS_MODULE,
	.dai_link = mt2701_wm8960_dai_links,
	.num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
	.controls = mt2701_wm8960_controls,
	.num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
	.dapm_widgets = mt2701_wm8960_widgets,
	.num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
};

static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card = &mt2701_wm8960_card;
	struct device_node *platform_node, *codec_node;
	int ret, i;

	platform_node = of_parse_phandle(pdev->dev.of_node,
					 "mediatek,platform", 0);
	if (!platform_node) {
		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
		return -EINVAL;
	}
	for (i = 0; i < card->num_links; i++) {
		if (mt2701_wm8960_dai_links[i].platform_name)
			continue;
		mt2701_wm8960_dai_links[i].platform_of_node = platform_node;
	}

	card->dev = &pdev->dev;

	codec_node = of_parse_phandle(pdev->dev.of_node,
				      "mediatek,audio-codec", 0);
	if (!codec_node) {
		dev_err(&pdev->dev,
			"Property 'audio-codec' missing or invalid\n");
		return -EINVAL;
	}
	for (i = 0; i < card->num_links; i++) {
		if (mt2701_wm8960_dai_links[i].codec_name)
			continue;
		mt2701_wm8960_dai_links[i].codec_of_node = codec_node;
	}

	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
	if (ret) {
		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
		return ret;
	}

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
			__func__, ret);

	return ret;
}

#ifdef CONFIG_OF
static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
	{.compatible = "mediatek,mt2701-wm8960-machine",},
	{}
};
#endif

static struct platform_driver mt2701_wm8960_machine = {
	.driver = {
		.name = "mt2701-wm8960",
		.owner = THIS_MODULE,
#ifdef CONFIG_OF
		.of_match_table = mt2701_wm8960_machine_dt_match,
#endif
	},
	.probe = mt2701_wm8960_machine_probe,
};

module_platform_driver(mt2701_wm8960_machine);

/* Module information */
MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("mt2701 wm8960 soc card");