sound/soc/samsung/littlemill.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 //
 // Littlemill audio support
 //
 // Copyright 2011 Wolfson Microelectronics

 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/jack.h>
 #include <linux/gpio.h>
 #include <linux/module.h>

 #include "../codecs/wm8994.h"

 static int sample_rate = 44100;

 static int littlemill_set_bias_level(struct snd_soc_card *card,
 					  struct snd_soc_dapm_context *dapm,
 					  enum snd_soc_bias_level level)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai *aif1_dai;
 	int ret;

 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 	aif1_dai = asoc_rtd_to_codec(rtd, 0);

 	if (dapm->dev != aif1_dai->dev)
 		return 0;

 	switch (level) {
 	case SND_SOC_BIAS_PREPARE:
 		/*
 		 * If we've not already clocked things via hw_params()
 		 * then do so now, otherwise these are noops.
 		 */
 		if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 			ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 						  WM8994_FLL_SRC_MCLK2, 32768,
 						  sample_rate * 512);
 			if (ret < 0) {
 				pr_err("Failed to start FLL: %d\n", ret);
 				return ret;
 			}

 			ret = snd_soc_dai_set_sysclk(aif1_dai,
 						     WM8994_SYSCLK_FLL1,
 						     sample_rate * 512,
 						     SND_SOC_CLOCK_IN);
 			if (ret < 0) {
 				pr_err("Failed to set SYSCLK: %d\n", ret);
 				return ret;
 			}
 		}
 		break;

 	default:
 		break;
 	}

 	return 0;
 }

 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
 					       struct snd_soc_dapm_context *dapm,
 					       enum snd_soc_bias_level level)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai *aif1_dai;
 	int ret;

 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 	aif1_dai = asoc_rtd_to_codec(rtd, 0);

 	if (dapm->dev != aif1_dai->dev)
 		return 0;

 	switch (level) {
 	case SND_SOC_BIAS_STANDBY:
 		ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 					     32768, SND_SOC_CLOCK_IN);
 		if (ret < 0) {
 			pr_err("Failed to switch away from FLL1: %d\n", ret);
 			return ret;
 		}

 		ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 					  0, 0, 0);
 		if (ret < 0) {
 			pr_err("Failed to stop FLL1: %d\n", ret);
 			return ret;
 		}
 		break;

 	default:
 		break;
 	}

 	dapm->bias_level = level;

 	return 0;
 }

 static int littlemill_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 	int ret;

 	sample_rate = params_rate(params);

 	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
 				  WM8994_FLL_SRC_MCLK2, 32768,
 				  sample_rate * 512);
 	if (ret < 0) {
 		pr_err("Failed to start FLL: %d\n", ret);
 		return ret;
 	}

 	ret = snd_soc_dai_set_sysclk(codec_dai,
 				     WM8994_SYSCLK_FLL1,
 				     sample_rate * 512,
 				     SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		pr_err("Failed to set SYSCLK: %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 static const struct snd_soc_ops littlemill_ops = {
 	.hw_params = littlemill_hw_params,
 };

 static const struct snd_soc_pcm_stream baseband_params = {
 	.formats = SNDRV_PCM_FMTBIT_S32_LE,
 	.rate_min = 8000,
 	.rate_max = 8000,
 	.channels_min = 2,
 	.channels_max = 2,
 };

 SND_SOC_DAILINK_DEFS(cpu,
 	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));

 SND_SOC_DAILINK_DEFS(baseband,
 	DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
 				      "wm1250-ev1")));

 static struct snd_soc_dai_link littlemill_dai[] = {
 	{
 		.name = "CPU",
 		.stream_name = "CPU",
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 				| SND_SOC_DAIFMT_CBM_CFM,
 		.ops = &littlemill_ops,
 		SND_SOC_DAILINK_REG(cpu),
 	},
 	{
 		.name = "Baseband",
 		.stream_name = "Baseband",
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
 				| SND_SOC_DAIFMT_CBM_CFM,
 		.ignore_suspend = 1,
 		.params = &baseband_params,
 		SND_SOC_DAILINK_REG(baseband),
 	},
 };

 static int bbclk_ev(struct snd_soc_dapm_widget *w,
 		    struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_card *card = w->dapm->card;
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_dai *aif2_dai;
 	int ret;

 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
 	aif2_dai = asoc_rtd_to_cpu(rtd, 0);

 	switch (event) {
 	case SND_SOC_DAPM_PRE_PMU:
 		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 					  WM8994_FLL_SRC_BCLK, 64 * 8000,
 					  8000 * 256);
 		if (ret < 0) {
 			pr_err("Failed to start FLL: %d\n", ret);
 			return ret;
 		}

 		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
 					     8000 * 256,
 					     SND_SOC_CLOCK_IN);
 		if (ret < 0) {
 			pr_err("Failed to set SYSCLK: %d\n", ret);
 			return ret;
 		}
 		break;
 	case SND_SOC_DAPM_POST_PMD:
 		ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 					     32768, SND_SOC_CLOCK_IN);
 		if (ret < 0) {
 			pr_err("Failed to switch away from FLL2: %d\n", ret);
 			return ret;
 		}

 		ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
 					  0, 0, 0);
 		if (ret < 0) {
 			pr_err("Failed to stop FLL2: %d\n", ret);
 			return ret;
 		}
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static const struct snd_kcontrol_new controls[] = {
 	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
 	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
 };

 static const struct snd_soc_dapm_widget widgets[] = {
 	SND_SOC_DAPM_HP("Headphone", NULL),

 	SND_SOC_DAPM_MIC("AMIC", NULL),
 	SND_SOC_DAPM_MIC("DMIC", NULL),

 	SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
 			      bbclk_ev,
 			      SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 };

 static const struct snd_soc_dapm_route audio_paths[] = {
 	{ "Headphone", NULL, "HPOUT1L" },
 	{ "Headphone", NULL, "HPOUT1R" },

 	{ "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
 	{ "IN1LN", NULL, "AMIC" },

 	{ "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
 	{ "DMIC1DAT", NULL, "DMIC" },
 	{ "DMIC2DAT", NULL, "DMIC" },

 	{ "AIF2CLK", NULL, "Baseband Clock" },
 };

 static struct snd_soc_jack littlemill_headset;

 static int littlemill_late_probe(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;
 	struct snd_soc_component *component;
 	struct snd_soc_dai *aif1_dai;
 	struct snd_soc_dai *aif2_dai;
 	int ret;

 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 	component = asoc_rtd_to_codec(rtd, 0)->component;
 	aif1_dai = asoc_rtd_to_codec(rtd, 0);

 	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
 	aif2_dai = asoc_rtd_to_cpu(rtd, 0);

 	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 				     32768, SND_SOC_CLOCK_IN);
 	if (ret < 0)
 		return ret;

 	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
 				     32768, SND_SOC_CLOCK_IN);
 	if (ret < 0)
 		return ret;

 	ret = snd_soc_card_jack_new(card, "Headset",
 				    SND_JACK_HEADSET | SND_JACK_MECHANICAL |
 				    SND_JACK_BTN_0 | SND_JACK_BTN_1 |
 				    SND_JACK_BTN_2 | SND_JACK_BTN_3 |
 				    SND_JACK_BTN_4 | SND_JACK_BTN_5,
 				    &littlemill_headset);
 	if (ret)
 		return ret;

 	/* This will check device compatibility itself */
 	wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);

 	/* As will this */
 	wm8994_mic_detect(component, &littlemill_headset, 1);

 	return 0;
 }

 static struct snd_soc_card littlemill = {
 	.name = "Littlemill",
 	.owner = THIS_MODULE,
 	.dai_link = littlemill_dai,
 	.num_links = ARRAY_SIZE(littlemill_dai),

 	.set_bias_level = littlemill_set_bias_level,
 	.set_bias_level_post = littlemill_set_bias_level_post,

 	.controls = controls,
 	.num_controls = ARRAY_SIZE(controls),
 	.dapm_widgets = widgets,
 	.num_dapm_widgets = ARRAY_SIZE(widgets),
 	.dapm_routes = audio_paths,
 	.num_dapm_routes = ARRAY_SIZE(audio_paths),

 	.late_probe = littlemill_late_probe,
 };

 static int littlemill_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = &littlemill;
 	int ret;

 	card->dev = &pdev->dev;

 	ret = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret)
 		dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");

 	return ret;
 }

 static struct platform_driver littlemill_driver = {
 	.driver = {
 		.name = "littlemill",
 		.pm = &snd_soc_pm_ops,
 	},
 	.probe = littlemill_probe,
 };

 module_platform_driver(littlemill_driver);

 MODULE_DESCRIPTION("Littlemill audio support");
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:littlemill");
	// SPDX-License-Identifier: GPL-2.0+
	//
	// Littlemill audio support
	//
	// Copyright 2011 Wolfson Microelectronics

	#include <sound/soc.h>
	#include <sound/soc-dapm.h>
	#include <sound/jack.h>
	#include <linux/gpio.h>
	#include <linux/module.h>

	#include "../codecs/wm8994.h"

	static int sample_rate = 44100;

	static int littlemill_set_bias_level(struct snd_soc_card *card,
	struct snd_soc_dapm_context *dapm,
	enum snd_soc_bias_level level)
	{
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_dai *aif1_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
	aif1_dai = asoc_rtd_to_codec(rtd, 0);

	if (dapm->dev != aif1_dai->dev)
	return 0;

	switch (level) {
	case SND_SOC_BIAS_PREPARE:
	/*
	* If we've not already clocked things via hw_params()
	* then do so now, otherwise these are noops.
	*/
	if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
	WM8994_FLL_SRC_MCLK2, 32768,
	sample_rate * 512);
	if (ret < 0) {
	pr_err("Failed to start FLL: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_sysclk(aif1_dai,
	WM8994_SYSCLK_FLL1,
	sample_rate * 512,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err("Failed to set SYSCLK: %d\n", ret);
	return ret;
	}
	}
	break;

	default:
	break;
	}

	return 0;
	}

	static int littlemill_set_bias_level_post(struct snd_soc_card *card,
	struct snd_soc_dapm_context *dapm,
	enum snd_soc_bias_level level)
	{
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_dai *aif1_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
	aif1_dai = asoc_rtd_to_codec(rtd, 0);

	if (dapm->dev != aif1_dai->dev)
	return 0;

	switch (level) {
	case SND_SOC_BIAS_STANDBY:
	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
	32768, SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err("Failed to switch away from FLL1: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
	0, 0, 0);
	if (ret < 0) {
	pr_err("Failed to stop FLL1: %d\n", ret);
	return ret;
	}
	break;

	default:
	break;
	}

	dapm->bias_level = level;

	return 0;
	}

	static int littlemill_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
	int ret;

	sample_rate = params_rate(params);

	ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
	WM8994_FLL_SRC_MCLK2, 32768,
	sample_rate * 512);
	if (ret < 0) {
	pr_err("Failed to start FLL: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_sysclk(codec_dai,
	WM8994_SYSCLK_FLL1,
	sample_rate * 512,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err("Failed to set SYSCLK: %d\n", ret);
	return ret;
	}

	return 0;
	}

	static const struct snd_soc_ops littlemill_ops = {
	.hw_params = littlemill_hw_params,
	};

	static const struct snd_soc_pcm_stream baseband_params = {
	.formats = SNDRV_PCM_FMTBIT_S32_LE,
	.rate_min = 8000,
	.rate_max = 8000,
	.channels_min = 2,
	.channels_max = 2,
	};

	SND_SOC_DAILINK_DEFS(cpu,
	DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
	DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));

	SND_SOC_DAILINK_DEFS(baseband,
	DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
	DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
	"wm1250-ev1")));

	static struct snd_soc_dai_link littlemill_dai[] = {
	{
	.name = "CPU",
	.stream_name = "CPU",
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF
	\| SND_SOC_DAIFMT_CBM_CFM,
	.ops = &littlemill_ops,
	SND_SOC_DAILINK_REG(cpu),
	},
	{
	.name = "Baseband",
	.stream_name = "Baseband",
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF
	\| SND_SOC_DAIFMT_CBM_CFM,
	.ignore_suspend = 1,
	.params = &baseband_params,
	SND_SOC_DAILINK_REG(baseband),
	},
	};

	static int bbclk_ev(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
	{
	struct snd_soc_card *card = w->dapm->card;
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_dai *aif2_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
	aif2_dai = asoc_rtd_to_cpu(rtd, 0);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
	ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
	WM8994_FLL_SRC_BCLK, 64 * 8000,
	8000 * 256);
	if (ret < 0) {
	pr_err("Failed to start FLL: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
	8000 * 256,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err("Failed to set SYSCLK: %d\n", ret);
	return ret;
	}
	break;
	case SND_SOC_DAPM_POST_PMD:
	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
	32768, SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err("Failed to switch away from FLL2: %d\n", ret);
	return ret;
	}

	ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
	0, 0, 0);
	if (ret < 0) {
	pr_err("Failed to stop FLL2: %d\n", ret);
	return ret;
	}
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static const struct snd_kcontrol_new controls[] = {
	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
	};

	static const struct snd_soc_dapm_widget widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),

	SND_SOC_DAPM_MIC("AMIC", NULL),
	SND_SOC_DAPM_MIC("DMIC", NULL),

	SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
	bbclk_ev,
	SND_SOC_DAPM_PRE_PMU \| SND_SOC_DAPM_POST_PMD),
	};

	static const struct snd_soc_dapm_route audio_paths[] = {
	{ "Headphone", NULL, "HPOUT1L" },
	{ "Headphone", NULL, "HPOUT1R" },

	{ "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */
	{ "IN1LN", NULL, "AMIC" },

	{ "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */
	{ "DMIC1DAT", NULL, "DMIC" },
	{ "DMIC2DAT", NULL, "DMIC" },

	{ "AIF2CLK", NULL, "Baseband Clock" },
	};

	static struct snd_soc_jack littlemill_headset;

	static int littlemill_late_probe(struct snd_soc_card *card)
	{
	struct snd_soc_pcm_runtime *rtd;
	struct snd_soc_component *component;
	struct snd_soc_dai *aif1_dai;
	struct snd_soc_dai *aif2_dai;
	int ret;

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
	component = asoc_rtd_to_codec(rtd, 0)->component;
	aif1_dai = asoc_rtd_to_codec(rtd, 0);

	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]);
	aif2_dai = asoc_rtd_to_cpu(rtd, 0);

	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
	32768, SND_SOC_CLOCK_IN);
	if (ret < 0)
	return ret;

	ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
	32768, SND_SOC_CLOCK_IN);
	if (ret < 0)
	return ret;

	ret = snd_soc_card_jack_new(card, "Headset",
	SND_JACK_HEADSET \| SND_JACK_MECHANICAL \|
	SND_JACK_BTN_0 \| SND_JACK_BTN_1 \|
	SND_JACK_BTN_2 \| SND_JACK_BTN_3 \|
	SND_JACK_BTN_4 \| SND_JACK_BTN_5,
	&littlemill_headset);
	if (ret)
	return ret;

	/* This will check device compatibility itself */
	wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL);

	/* As will this */
	wm8994_mic_detect(component, &littlemill_headset, 1);

	return 0;
	}

	static struct snd_soc_card littlemill = {
	.name = "Littlemill",
	.owner = THIS_MODULE,
	.dai_link = littlemill_dai,
	.num_links = ARRAY_SIZE(littlemill_dai),

	.set_bias_level = littlemill_set_bias_level,
	.set_bias_level_post = littlemill_set_bias_level_post,

	.controls = controls,
	.num_controls = ARRAY_SIZE(controls),
	.dapm_widgets = widgets,
	.num_dapm_widgets = ARRAY_SIZE(widgets),
	.dapm_routes = audio_paths,
	.num_dapm_routes = ARRAY_SIZE(audio_paths),

	.late_probe = littlemill_late_probe,
	};

	static int littlemill_probe(struct platform_device *pdev)
	{
	struct snd_soc_card *card = &littlemill;
	int ret;

	card->dev = &pdev->dev;

	ret = devm_snd_soc_register_card(&pdev->dev, card);
	if (ret)
	dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n");

	return ret;
	}

	static struct platform_driver littlemill_driver = {
	.driver = {
	.name = "littlemill",
	.pm = &snd_soc_pm_ops,
	},
	.probe = littlemill_probe,
	};

	module_platform_driver(littlemill_driver);

	MODULE_DESCRIPTION("Littlemill audio support");
	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:littlemill");