mt2701-wm8960.c

  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
 14static 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
 19static const struct snd_kcontrol_new mt2701_wm8960_controls[] = {
 20	SOC_DAPM_PIN_SWITCH("Headphone"),
 21	SOC_DAPM_PIN_SWITCH("AMIC"),
 22};
 23
 24static 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 = snd_soc_substream_to_rtd(substream);
 28	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 29	struct snd_soc_dai *cpu_dai = snd_soc_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
 43static const struct snd_soc_ops mt2701_wm8960_be_ops = {
 44	.hw_params = mt2701_wm8960_be_ops_hw_params
 45};
 46
 47SND_SOC_DAILINK_DEFS(playback,
 48	DAILINK_COMP_ARRAY(COMP_CPU("PCMO0")),
 49	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 50	DAILINK_COMP_ARRAY(COMP_EMPTY()));
 51
 52SND_SOC_DAILINK_DEFS(capture,
 53	DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
 54	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 55	DAILINK_COMP_ARRAY(COMP_EMPTY()));
 56
 57SND_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
 62static 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		.playback_only = 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		.capture_only = 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_CBC_CFC
 87			| SND_SOC_DAIFMT_GATED,
 88		.ops = &mt2701_wm8960_be_ops,
 89		SND_SOC_DAILINK_REG(codec),
 90	},
 91};
 92
 93static 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
104static 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	struct snd_soc_dai_link *dai_link;
109	int ret, i;
110
111	platform_node = of_parse_phandle(pdev->dev.of_node,
112					 "mediatek,platform", 0);
113	if (!platform_node) {
114		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
115		return -EINVAL;
116	}
117	for_each_card_prelinks(card, i, dai_link) {
118		if (dai_link->platforms->name)
119			continue;
120		dai_link->platforms->of_node = platform_node;
121	}
122
123	card->dev = &pdev->dev;
124
125	codec_node = of_parse_phandle(pdev->dev.of_node,
126				      "mediatek,audio-codec", 0);
127	if (!codec_node) {
128		dev_err(&pdev->dev,
129			"Property 'audio-codec' missing or invalid\n");
130		ret = -EINVAL;
131		goto put_platform_node;
132	}
133	for_each_card_prelinks(card, i, dai_link) {
134		if (dai_link->codecs->name)
135			continue;
136		dai_link->codecs->of_node = codec_node;
137	}
138
139	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
140	if (ret) {
141		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
142		goto put_codec_node;
143	}
144
145	ret = devm_snd_soc_register_card(&pdev->dev, card);
146	if (ret)
147		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
148			__func__, ret);
149
150put_codec_node:
151	of_node_put(codec_node);
152put_platform_node:
153	of_node_put(platform_node);
154	return ret;
155}
156
157#ifdef CONFIG_OF
158static const struct of_device_id mt2701_wm8960_machine_dt_match[] = {
159	{.compatible = "mediatek,mt2701-wm8960-machine",},
160	{}
161};
162MODULE_DEVICE_TABLE(of, mt2701_wm8960_machine_dt_match);
163#endif
164
165static struct platform_driver mt2701_wm8960_machine = {
166	.driver = {
167		.name = "mt2701-wm8960",
168#ifdef CONFIG_OF
169		.of_match_table = mt2701_wm8960_machine_dt_match,
170#endif
171	},
172	.probe = mt2701_wm8960_machine_probe,
173};
174
175module_platform_driver(mt2701_wm8960_machine);
176
177/* Module information */
178MODULE_DESCRIPTION("MT2701 WM8960 ALSA SoC machine driver");
179MODULE_AUTHOR("Ryder Lee <ryder.lee@mediatek.com>");
180MODULE_LICENSE("GPL v2");
181MODULE_ALIAS("mt2701 wm8960 soc card");
182