1 /*
2  * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
3  *
4  * Copyright (c) 2017 MediaTek Inc.
5  * Author: Ryder Lee <ryder.lee@mediatek.com>
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 and
9  * only version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  */
16 
17 #include <linux/module.h>
18 #include <sound/soc.h>
19 
20 #include "mt2701-afe-common.h"
21 
22 static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
23 	SND_SOC_DAPM_HP("Headphone", NULL),
24 	SND_SOC_DAPM_MIC("AMIC", NULL),
25 };
26 
27 static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
28 	SOC_DAPM_PIN_SWITCH("Headphone"),
29 	SOC_DAPM_PIN_SWITCH("AMIC"),
30 };
31 
32 static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
33 					  struct snd_pcm_hw_params *params)
34 {
35 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
36 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
38 	unsigned int mclk_rate;
39 	unsigned int rate = params_rate(params);
40 	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
41 	unsigned int div_bck_over_lrck = 64;
42 
43 	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
44 
45 	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
46 	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
47 
48 	return 0;
49 }
50 
51 static struct snd_soc_ops mt2701_wm8960_be_ops = {
52 	.hw_params = mt2701_wm8960_be_ops_hw_params
53 };
54 
55 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
56 	/* FE */
57 	{
58 		.name = "wm8960-playback",
59 		.stream_name = "wm8960-playback",
60 		.cpu_dai_name = "PCMO0",
61 		.codec_name = "snd-soc-dummy",
62 		.codec_dai_name = "snd-soc-dummy-dai",
63 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
64 			    SND_SOC_DPCM_TRIGGER_POST},
65 		.dynamic = 1,
66 		.dpcm_playback = 1,
67 	},
68 	{
69 		.name = "wm8960-capture",
70 		.stream_name = "wm8960-capture",
71 		.cpu_dai_name = "PCM0",
72 		.codec_name = "snd-soc-dummy",
73 		.codec_dai_name = "snd-soc-dummy-dai",
74 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
75 			    SND_SOC_DPCM_TRIGGER_POST},
76 		.dynamic = 1,
77 		.dpcm_capture = 1,
78 	},
79 	/* BE */
80 	{
81 		.name = "wm8960-codec",
82 		.cpu_dai_name = "I2S0",
83 		.no_pcm = 1,
84 		.codec_dai_name = "wm8960-hifi",
85 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
86 			| SND_SOC_DAIFMT_GATED,
87 		.ops = &mt2701_wm8960_be_ops,
88 		.dpcm_playback = 1,
89 		.dpcm_capture = 1,
90 	},
91 };
92 
93 static struct snd_soc_card mt2701_wm8960_card = {
94 	.name = "mt2701-wm8960",
95 	.owner = THIS_MODULE,
96 	.dai_link = mt2701_wm8960_dai_links,
97 	.num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
98 	.controls = mt2701_wm8960_controls,
99 	.num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
100 	.dapm_widgets = mt2701_wm8960_widgets,
101 	.num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
102 };
103 
104 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
105 {
106 	struct snd_soc_card *card = &mt2701_wm8960_card;
107 	struct device_node *platform_node, *codec_node;
108 	int ret, i;
109 
110 	platform_node = of_parse_phandle(pdev->dev.of_node,
111 					 "mediatek,platform", 0);
112 	if (!platform_node) {
113 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
114 		return -EINVAL;
115 	}
116 	for (i = 0; i < card->num_links; i++) {
117 		if (mt2701_wm8960_dai_links[i].platform_name)
118 			continue;
119 		mt2701_wm8960_dai_links[i].platform_of_node = platform_node;
120 	}
121 
122 	card->dev = &pdev->dev;
123 
124 	codec_node = of_parse_phandle(pdev->dev.of_node,
125 				      "mediatek,audio-codec", 0);
126 	if (!codec_node) {
127 		dev_err(&pdev->dev,
128 			"Property 'audio-codec' missing or invalid\n");
129 		return -EINVAL;
130 	}
131 	for (i = 0; i < card->num_links; i++) {
132 		if (mt2701_wm8960_dai_links[i].codec_name)
133 			continue;
134 		mt2701_wm8960_dai_links[i].codec_of_node = codec_node;
135 	}
136 
137 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
138 	if (ret) {
139 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
140 		return ret;
141 	}
142 
143 	ret = devm_snd_soc_register_card(&pdev->dev, card);
144 	if (ret)
145 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
146 			__func__, ret);
147 
148 	return ret;
149 }
150 
151 #ifdef CONFIG_OF
152 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
153 	{.compatible = "mediatek,mt2701-wm8960-machine",},
154 	{}
155 };
156 #endif
157 
158 static struct platform_driver mt2701_wm8960_machine = {
159 	.driver = {
160 		.name = "mt2701-wm8960",
161 		.owner = THIS_MODULE,
162 #ifdef CONFIG_OF
163 		.of_match_table = mt2701_wm8960_machine_dt_match,
164 #endif
165 	},
166 	.probe = mt2701_wm8960_machine_probe,
167 };
168 
169 module_platform_driver(mt2701_wm8960_machine);
170 
171 /* Module information */
172 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
173 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
174 MODULE_LICENSE("GPL v2");
175 MODULE_ALIAS("mt2701 wm8960 soc card");
176 
177