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 
mt2701_wm8960_be_ops_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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 = asoc_substream_to_rtd(substream);
28 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
29 	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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 const struct snd_soc_ops mt2701_wm8960_be_ops = {
44 	.hw_params = mt2701_wm8960_be_ops_hw_params
45 };
46 
47 SND_SOC_DAILINK_DEFS(playback,
48 	DAILINK_COMP_ARRAY(COMP_CPU("PCMO0")),
49 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
50 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
51 
52 SND_SOC_DAILINK_DEFS(capture,
53 	DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
54 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
55 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
56 
57 SND_SOC_DAILINK_DEFS(codec,
58 	DAILINK_COMP_ARRAY(COMP_CPU("I2S0")),
59 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8960-hifi")),
60 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
61 
62 static struct snd_soc_dai_link mt2701_wm8960_dai_links[] = {
63 	/* FE */
64 	{
65 		.name = "wm8960-playback",
66 		.stream_name = "wm8960-playback",
67 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
68 			    SND_SOC_DPCM_TRIGGER_POST},
69 		.dynamic = 1,
70 		.dpcm_playback = 1,
71 		SND_SOC_DAILINK_REG(playback),
72 	},
73 	{
74 		.name = "wm8960-capture",
75 		.stream_name = "wm8960-capture",
76 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
77 			    SND_SOC_DPCM_TRIGGER_POST},
78 		.dynamic = 1,
79 		.dpcm_capture = 1,
80 		SND_SOC_DAILINK_REG(capture),
81 	},
82 	/* BE */
83 	{
84 		.name = "wm8960-codec",
85 		.no_pcm = 1,
86 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
87 			| SND_SOC_DAIFMT_GATED,
88 		.ops = &mt2701_wm8960_be_ops,
89 		.dpcm_playback = 1,
90 		.dpcm_capture = 1,
91 		SND_SOC_DAILINK_REG(codec),
92 	},
93 };
94 
95 static struct snd_soc_card mt2701_wm8960_card = {
96 	.name = "mt2701-wm8960",
97 	.owner = THIS_MODULE,
98 	.dai_link = mt2701_wm8960_dai_links,
99 	.num_links = ARRAY_SIZE(mt2701_wm8960_dai_links),
100 	.controls = mt2701_wm8960_controls,
101 	.num_controls = ARRAY_SIZE(mt2701_wm8960_controls),
102 	.dapm_widgets = mt2701_wm8960_widgets,
103 	.num_dapm_widgets = ARRAY_SIZE(mt2701_wm8960_widgets),
104 };
105 
mt2701_wm8960_machine_probe(struct platform_device * pdev)106 static int mt2701_wm8960_machine_probe(struct platform_device *pdev)
107 {
108 	struct snd_soc_card *card = &mt2701_wm8960_card;
109 	struct device_node *platform_node, *codec_node;
110 	struct snd_soc_dai_link *dai_link;
111 	int ret, i;
112 
113 	platform_node = of_parse_phandle(pdev->dev.of_node,
114 					 "mediatek,platform", 0);
115 	if (!platform_node) {
116 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
117 		return -EINVAL;
118 	}
119 	for_each_card_prelinks(card, i, dai_link) {
120 		if (dai_link->platforms->name)
121 			continue;
122 		dai_link->platforms->of_node = platform_node;
123 	}
124 
125 	card->dev = &pdev->dev;
126 
127 	codec_node = of_parse_phandle(pdev->dev.of_node,
128 				      "mediatek,audio-codec", 0);
129 	if (!codec_node) {
130 		dev_err(&pdev->dev,
131 			"Property 'audio-codec' missing or invalid\n");
132 		ret = -EINVAL;
133 		goto put_platform_node;
134 	}
135 	for_each_card_prelinks(card, i, dai_link) {
136 		if (dai_link->codecs->name)
137 			continue;
138 		dai_link->codecs->of_node = codec_node;
139 	}
140 
141 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
142 	if (ret) {
143 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
144 		goto put_codec_node;
145 	}
146 
147 	ret = devm_snd_soc_register_card(&pdev->dev, card);
148 	if (ret)
149 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
150 			__func__, ret);
151 
152 put_codec_node:
153 	of_node_put(codec_node);
154 put_platform_node:
155 	of_node_put(platform_node);
156 	return ret;
157 }
158 
159 #ifdef CONFIG_OF
160 static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
161 	{.compatible = "mediatek,mt2701-wm8960-machine",},
162 	{}
163 };
164 MODULE_DEVICE_TABLE(of, mt2701_wm8960_machine_dt_match);
165 #endif
166 
167 static struct platform_driver mt2701_wm8960_machine = {
168 	.driver = {
169 		.name = "mt2701-wm8960",
170 #ifdef CONFIG_OF
171 		.of_match_table = mt2701_wm8960_machine_dt_match,
172 #endif
173 	},
174 	.probe = mt2701_wm8960_machine_probe,
175 };
176 
177 module_platform_driver(mt2701_wm8960_machine);
178 
179 /* Module information */
180 MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
181 MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
182 MODULE_LICENSE("GPL v2");
183 MODULE_ALIAS("mt2701 wm8960 soc card");
184 
185