1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * mt2701-wm8960.c  --  MT2701 WM8960 ALSA SoC machine driver
4  *
5  * Copyright (c) 2017 MediaTek Inc.
6  * Author: Ryder Lee <ryder.lee@mediatek.com>
7  */
8 
9 #include <linux/module.h>
10 #include <sound/soc.h>
11 
12 #include "mt2701-afe-common.h"
13 
14 static const struct snd_soc_dapm_widget mt2701_wm8960_widgets[] = {
15 	SND_SOC_DAPM_HP("Headphone", NULL),
16 	SND_SOC_DAPM_MIC("AMIC", NULL),
17 };
18 
19 static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
20 	SOC_DAPM_PIN_SWITCH("Headphone"),
21 	SOC_DAPM_PIN_SWITCH("AMIC"),
22 };
23 
24 static int mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream *substream,
25 					  struct snd_pcm_hw_params *params)
26 {
27 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
28 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
29 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
30 	unsigned int mclk_rate;
31 	unsigned int rate = params_rate(params);
32 	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
33 	unsigned int div_bck_over_lrck = 64;
34 
35 	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;
36 
37 	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);
38 	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);
39 
40 	return 0;
41 }
42 
43 static struct snd_soc_ops mt2701_wm8960_be_ops = {
44 	.hw_params = mt2701_wm8960_be_ops_hw_params
45 };
46 
47 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
48 	/* FE */
49 	{
50 		.name = "wm8960-playback",
51 		.stream_name = "wm8960-playback",
52 		.cpu_dai_name = "PCMO0",
53 		.codec_name = "snd-soc-dummy",
54 		.codec_dai_name = "snd-soc-dummy-dai",
55 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
56 			    SND_SOC_DPCM_TRIGGER_POST},
57 		.dynamic = 1,
58 		.dpcm_playback = 1,
59 	},
60 	{
61 		.name = "wm8960-capture",
62 		.stream_name = "wm8960-capture",
63 		.cpu_dai_name = "PCM0",
64 		.codec_name = "snd-soc-dummy",
65 		.codec_dai_name = "snd-soc-dummy-dai",
66 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
67 			    SND_SOC_DPCM_TRIGGER_POST},
68 		.dynamic = 1,
69 		.dpcm_capture = 1,
70 	},
71 	/* BE */
72 	{
73 		.name = "wm8960-codec",
74 		.cpu_dai_name = "I2S0",
75 		.no_pcm = 1,
76 		.codec_dai_name = "wm8960-hifi",
77 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
78 			| SND_SOC_DAIFMT_GATED,
79 		.ops = &mt2701_wm8960_be_ops,
80 		.dpcm_playback = 1,
81 		.dpcm_capture = 1,
82 	},
83 };
84 
85 static struct snd_soc_card mt2701_wm8960_card = {
86 	.name = "mt2701-wm8960",
87 	.owner = THIS_MODULE,
88 	.dai_link = mt2701_wm8960_dai_links,
89 	.num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
90 	.controls = mt2701_wm8960_controls,
91 	.num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
92 	.dapm_widgets = mt2701_wm8960_widgets,
93 	.num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
94 };
95 
96 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
97 {
98 	struct snd_soc_card *card = &mt2701_wm8960_card;
99 	struct device_node *platform_node, *codec_node;
100 	struct snd_soc_dai_link *dai_link;
101 	int ret, i;
102 
103 	platform_node = of_parse_phandle(pdev->dev.of_node,
104 					 "mediatek,platform", 0);
105 	if (!platform_node) {
106 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
107 		return -EINVAL;
108 	}
109 	for_each_card_prelinks(card, i, dai_link) {
110 		if (dai_link->platform_name)
111 			continue;
112 		dai_link->platform_of_node = platform_node;
113 	}
114 
115 	card->dev = &pdev->dev;
116 
117 	codec_node = of_parse_phandle(pdev->dev.of_node,
118 				      "mediatek,audio-codec", 0);
119 	if (!codec_node) {
120 		dev_err(&pdev->dev,
121 			"Property 'audio-codec' missing or invalid\n");
122 		return -EINVAL;
123 	}
124 	for_each_card_prelinks(card, i, dai_link) {
125 		if (dai_link->codec_name)
126 			continue;
127 		dai_link->codec_of_node = codec_node;
128 	}
129 
130 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
131 	if (ret) {
132 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
133 		return ret;
134 	}
135 
136 	ret = devm_snd_soc_register_card(&pdev->dev, card);
137 	if (ret)
138 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
139 			__func__, ret);
140 
141 	return ret;
142 }
143 
144 #ifdef CONFIG_OF
145 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
146 	{.compatible = "mediatek,mt2701-wm8960-machine",},
147 	{}
148 };
149 #endif
150 
151 static struct platform_driver mt2701_wm8960_machine = {
152 	.driver = {
153 		.name = "mt2701-wm8960",
154 #ifdef CONFIG_OF
155 		.of_match_table = mt2701_wm8960_machine_dt_match,
156 #endif
157 	},
158 	.probe = mt2701_wm8960_machine_probe,
159 };
160 
161 module_platform_driver(mt2701_wm8960_machine);
162 
163 /* Module information */
164 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
165 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
166 MODULE_LICENSE("GPL v2");
167 MODULE_ALIAS("mt2701 wm8960 soc card");
168 
169