Unverified Commit fd0ea9cd authored by Simon Shields's avatar Simon Shields Committed by Mark Brown
Browse files

ASoC: samsung: Add sound support for Midas boards 



This patch adds support for voice and BT calls, along with standard
audio output via the speaker, earpiece, headphone jack, HDMI, and
any accessories compatible with Midas boards. This patch also supports
headphone/headset detection and headsets with inline buttons.

[m.szyprowski: adaptation to v5.1+ kernels (DAI links initialization)]
[s.nawrocki: removal of the clk API calls for CODEC MCLK, the jack data
 structure moved to struct midas_priv, coding style and typo fixes,
 conversion to new cpu/codec/dai-node binding]

Signed-off-by: default avatarSimon Shields <simon@lineageos.org>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200728131111.14334-2-s.nawrocki@samsung.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f61d06ae

sound/soc/samsung/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -225,4 +225,12 @@ config SND_SOC_SAMSUNG_ARIES_WM8994 
	  via ADC, GPIOs, and an extcon device.  Switching between the Mic

	  and TV-Out path is also handled.



config SND_SOC_SAMSUNG_MIDAS_WM1811

	tristate "SoC I2S Audio support for Midas boards"

	depends on SND_SOC_SAMSUNG

	select SND_SAMSUNG_I2S

	select SND_SOC_WM8994

	help

	  Say Y if you want to add support for SoC audio on the Midas boards.



endif #SND_SOC_SAMSUNG

sound/soc/samsung/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ snd-soc-odroid-objs := odroid.o 
snd-soc-arndale-objs := arndale.o

snd-soc-tm2-wm5110-objs := tm2_wm5110.o

snd-soc-aries-wm8994-objs := aries_wm8994.o

snd-soc-midas-wm1811-objs := midas_wm1811.o



obj-$(CONFIG_SND_SOC_SAMSUNG_JIVE_WM8750) += snd-soc-jive-wm8750.o

obj-$(CONFIG_SND_SOC_SAMSUNG_NEO1973_WM8753) += snd-soc-neo1973-wm8753.o
@@ -66,3 +67,4 @@ obj-$(CONFIG_SND_SOC_ODROID) += snd-soc-odroid.o 
obj-$(CONFIG_SND_SOC_ARNDALE) += snd-soc-arndale.o

obj-$(CONFIG_SND_SOC_SAMSUNG_TM2_WM5110) += snd-soc-tm2-wm5110.o

obj-$(CONFIG_SND_SOC_SAMSUNG_ARIES_WM8994) += snd-soc-aries-wm8994.o

obj-$(CONFIG_SND_SOC_SAMSUNG_MIDAS_WM1811) += snd-soc-midas-wm1811.o

sound/soc/samsung/midas_wm1811.c

0 → 100644
+543 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

//

// Midas audio support

//

// Copyright (C) 2018 Simon Shields <simon@lineageos.org>

// Copyright (C) 2020 Samsung Electronics Co., Ltd.



#include <linux/clk.h>

#include <linux/mfd/wm8994/registers.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <linux/regulator/consumer.h>

#include <sound/jack.h>

#include <sound/soc.h>

#include <sound/soc-dapm.h>



#include "i2s.h"

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



/*

 * The MCLK1 clock source is XCLKOUT with its mux set to the external fixed rate

 * oscillator (XXTI).

 */

#define MCLK1_RATE 24000000U

#define MCLK2_RATE 32768U

#define DEFAULT_FLL1_RATE 11289600U



struct midas_priv {

	struct regulator *reg_mic_bias;

	struct regulator *reg_submic_bias;

	struct gpio_desc *gpio_fm_sel;

	struct gpio_desc *gpio_lineout_sel;

	unsigned int fll1_rate;



	struct snd_soc_jack headset_jack;

};



static int midas_start_fll1(struct snd_soc_pcm_runtime *rtd, unsigned int rate)

{

	struct snd_soc_card *card = rtd->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);

	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);

	struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);

	int ret;



	if (!rate)

		rate = priv->fll1_rate;

	/*

	 * If no new rate is requested, set FLL1 to a sane default for jack

	 * detection.

	 */

	if (!rate)

		rate = DEFAULT_FLL1_RATE;



	if (rate != priv->fll1_rate && priv->fll1_rate) {

		/* while reconfiguring, switch to MCLK2 for SYSCLK */

		ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,

					     MCLK2_RATE, SND_SOC_CLOCK_IN);

		if (ret < 0) {

			dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);

			return ret;

		}

	}



	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,

				  MCLK1_RATE, rate);

	if (ret < 0) {

		dev_err(card->dev, "Failed to set FLL1 rate: %d\n", ret);

		return ret;

	}

	priv->fll1_rate = rate;



	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_FLL1,

				     priv->fll1_rate, SND_SOC_CLOCK_IN);

	if (ret < 0) {

		dev_err(card->dev, "Failed to set SYSCLK source: %d\n", ret);

		return ret;

	}



	ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_OPCLK, 0,

				     SAMSUNG_I2S_OPCLK_PCLK);

	if (ret < 0) {

		dev_err(card->dev, "Failed to set OPCLK source: %d\n", ret);

		return ret;

	}



	return 0;

}



static int midas_stop_fll1(struct snd_soc_pcm_runtime *rtd)

{

	struct snd_soc_card *card = rtd->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);

	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);

	int ret;



	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,

				     MCLK2_RATE, SND_SOC_CLOCK_IN);

	if (ret < 0) {

		dev_err(card->dev, "Unable to switch to MCLK2: %d\n", ret);

		return ret;

	}



	ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 0, 0, 0);

	if (ret < 0) {

		dev_err(card->dev, "Unable to stop FLL1: %d\n", ret);

		return ret;

	}



	priv->fll1_rate = 0;



	return 0;

}



static int midas_aif1_hw_params(struct snd_pcm_substream *substream,

				struct snd_pcm_hw_params *params)

{

	struct snd_soc_pcm_runtime *rtd	= substream->private_data;

	unsigned int pll_out;



	/* AIF1CLK should be at least 3MHz for "optimal performance" */

	if (params_rate(params) == 8000 || params_rate(params) == 11025)

		pll_out = params_rate(params) * 512;

	else

		pll_out = params_rate(params) * 256;



	return midas_start_fll1(rtd, pll_out);

}



static struct snd_soc_ops midas_aif1_ops = {

	.hw_params = midas_aif1_hw_params,

};



/*

 * We only have a single external speaker, so mix stereo data

 * to a single mono stream.

 */

static int midas_ext_spkmode(struct snd_soc_dapm_widget *w,

			     struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_component *codec = snd_soc_dapm_to_component(w->dapm);

	int ret = 0;



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,

				  WM8994_SPKMIXR_TO_SPKOUTL_MASK,

				  WM8994_SPKMIXR_TO_SPKOUTL);

		break;

	case SND_SOC_DAPM_POST_PMD:

		ret = snd_soc_component_update_bits(codec, WM8994_SPKOUT_MIXERS,

				  WM8994_SPKMIXR_TO_SPKOUTL_MASK,

				  0);

		break;

	}



	return ret;

}



static int midas_mic_bias(struct snd_soc_dapm_widget *w,

			  struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_card *card = w->dapm->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		return regulator_enable(priv->reg_mic_bias);

	case SND_SOC_DAPM_POST_PMD:

		return regulator_disable(priv->reg_mic_bias);

	}



	return 0;

}



static int midas_submic_bias(struct snd_soc_dapm_widget *w,

			     struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_card *card = w->dapm->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		return regulator_enable(priv->reg_submic_bias);

	case SND_SOC_DAPM_POST_PMD:

		return regulator_disable(priv->reg_submic_bias);

	}



	return 0;

}



static int midas_fm_set(struct snd_soc_dapm_widget *w,

			struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_card *card = w->dapm->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);



	if (!priv->gpio_fm_sel)

		return 0;



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		gpiod_set_value_cansleep(priv->gpio_fm_sel, 1);

		break;

	case SND_SOC_DAPM_POST_PMD:

		gpiod_set_value_cansleep(priv->gpio_fm_sel, 0);

		break;

	}



	return 0;

}



static int midas_line_set(struct snd_soc_dapm_widget *w,

			  struct snd_kcontrol *kcontrol, int event)

{

	struct snd_soc_card *card = w->dapm->card;

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);



	if (!priv->gpio_lineout_sel)

		return 0;



	switch (event) {

	case SND_SOC_DAPM_PRE_PMU:

		gpiod_set_value_cansleep(priv->gpio_lineout_sel, 1);

		break;

	case SND_SOC_DAPM_POST_PMD:

		gpiod_set_value_cansleep(priv->gpio_lineout_sel, 0);

		break;

	}



	return 0;

}



static const struct snd_kcontrol_new midas_controls[] = {

	SOC_DAPM_PIN_SWITCH("HP"),



	SOC_DAPM_PIN_SWITCH("SPK"),

	SOC_DAPM_PIN_SWITCH("RCV"),



	SOC_DAPM_PIN_SWITCH("LINE"),

	SOC_DAPM_PIN_SWITCH("HDMI"),



	SOC_DAPM_PIN_SWITCH("Main Mic"),

	SOC_DAPM_PIN_SWITCH("Sub Mic"),

	SOC_DAPM_PIN_SWITCH("Headset Mic"),



	SOC_DAPM_PIN_SWITCH("FM In"),

};



static const struct snd_soc_dapm_widget midas_dapm_widgets[] = {

	SND_SOC_DAPM_HP("HP", NULL),



	SND_SOC_DAPM_SPK("SPK", midas_ext_spkmode),

	SND_SOC_DAPM_SPK("RCV", NULL),



	/* FIXME: toggle MAX77693 on i9300/i9305 */

	SND_SOC_DAPM_LINE("LINE", midas_line_set),

	SND_SOC_DAPM_LINE("HDMI", NULL),

	SND_SOC_DAPM_LINE("FM In", midas_fm_set),



	SND_SOC_DAPM_MIC("Headset Mic", NULL),

	SND_SOC_DAPM_MIC("Main Mic", midas_mic_bias),

	SND_SOC_DAPM_MIC("Sub Mic", midas_submic_bias),

};



static int midas_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 = snd_soc_get_pcm_runtime(card,

						  &card->dai_link[0]);

	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);



	if (dapm->dev != aif1_dai->dev)

		return 0;



	switch (level) {

	case SND_SOC_BIAS_STANDBY:

		return midas_stop_fll1(rtd);

	case SND_SOC_BIAS_PREPARE:

		return midas_start_fll1(rtd, 0);

	default:

		break;

	}



	return 0;

}



static int midas_late_probe(struct snd_soc_card *card)

{

	struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card,

							&card->dai_link[0]);

	struct snd_soc_dai *aif1_dai = asoc_rtd_to_codec(rtd, 0);

	struct midas_priv *priv = snd_soc_card_get_drvdata(card);

	int ret;



	/* Use MCLK2 as SYSCLK for boot */

	ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, MCLK2_RATE,

				     SND_SOC_CLOCK_IN);

	if (ret < 0) {

		dev_err(aif1_dai->dev, "Failed to switch to MCLK2: %d\n", ret);

		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,

			&priv->headset_jack, NULL, 0);

	if (ret)

		return ret;



	wm8958_mic_detect(aif1_dai->component, &priv->headset_jack,

			  NULL, NULL, NULL, NULL);

	return 0;

}



static struct snd_soc_dai_driver midas_ext_dai[] = {

	{

		.name = "Voice call",

		.playback = {

			.channels_min = 1,

			.channels_max = 2,

			.rate_min = 8000,

			.rate_max = 16000,

			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

		.capture = {

			.channels_min = 1,

			.channels_max = 2,

			.rate_min = 8000,

			.rate_max = 16000,

			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

	},

	{

		.name = "Bluetooth",

		.playback = {

			.channels_min = 1,

			.channels_max = 2,

			.rate_min = 8000,

			.rate_max = 16000,

			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

		.capture = {

			.channels_min = 1,

			.channels_max = 2,

			.rate_min = 8000,

			.rate_max = 16000,

			.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),

			.formats = SNDRV_PCM_FMTBIT_S16_LE,

		},

	},

};



static const struct snd_soc_component_driver midas_component = {

	.name	= "midas-audio",

};



SND_SOC_DAILINK_DEFS(wm1811_hifi,

	DAILINK_COMP_ARRAY(COMP_EMPTY()),

	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif1")),

	DAILINK_COMP_ARRAY(COMP_EMPTY()));



SND_SOC_DAILINK_DEFS(wm1811_voice,

	DAILINK_COMP_ARRAY(COMP_EMPTY()),

	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif2")),

	DAILINK_COMP_ARRAY(COMP_EMPTY()));



SND_SOC_DAILINK_DEFS(wm1811_bt,

	DAILINK_COMP_ARRAY(COMP_EMPTY()),

	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8994-aif3")),

	DAILINK_COMP_ARRAY(COMP_EMPTY()));



static struct snd_soc_dai_link midas_dai[] = {

	{

		.name = "WM8994 AIF1",

		.stream_name = "HiFi Primary",

		.ops = &midas_aif1_ops,

		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |

			SND_SOC_DAIFMT_CBM_CFM,

		SND_SOC_DAILINK_REG(wm1811_hifi),

	}, {

		.name = "WM1811 Voice",

		.stream_name = "Voice call",

		.ignore_suspend = 1,

		SND_SOC_DAILINK_REG(wm1811_voice),

	}, {

		.name = "WM1811 BT",

		.stream_name = "Bluetooth",

		.ignore_suspend = 1,

		SND_SOC_DAILINK_REG(wm1811_bt),

	},

};



static struct snd_soc_card midas_card = {

	.name = "Midas WM1811",

	.owner = THIS_MODULE,



	.dai_link = midas_dai,

	.num_links = ARRAY_SIZE(midas_dai),

	.controls = midas_controls,

	.num_controls = ARRAY_SIZE(midas_controls),

	.dapm_widgets = midas_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(midas_dapm_widgets),



	.set_bias_level = midas_set_bias_level,

	.late_probe = midas_late_probe,

};



static int midas_probe(struct platform_device *pdev)

{

	struct device_node *cpu_dai_node = NULL, *codec_dai_node = NULL;

	struct device_node *cpu = NULL, *codec = NULL;

	struct snd_soc_card *card = &midas_card;

	struct device *dev = &pdev->dev;

	static struct snd_soc_dai_link *dai_link;

	struct midas_priv *priv;

	int ret, i;



	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	snd_soc_card_set_drvdata(card, priv);

	card->dev = dev;



	priv->reg_mic_bias = devm_regulator_get(dev, "mic-bias");

	if (IS_ERR(priv->reg_mic_bias)) {

		dev_err(dev, "Failed to get mic bias regulator\n");

		return PTR_ERR(priv->reg_mic_bias);

	}



	priv->reg_submic_bias = devm_regulator_get(dev, "submic-bias");

	if (IS_ERR(priv->reg_submic_bias)) {

		dev_err(dev, "Failed to get submic bias regulator\n");

		return PTR_ERR(priv->reg_submic_bias);

	}



	priv->gpio_fm_sel = devm_gpiod_get_optional(dev, "fm-sel", GPIOD_OUT_HIGH);

	if (IS_ERR(priv->gpio_fm_sel)) {

		dev_err(dev, "Failed to get FM selection GPIO\n");

		return PTR_ERR(priv->gpio_fm_sel);

	}



	priv->gpio_lineout_sel = devm_gpiod_get_optional(dev, "lineout-sel",

						    GPIOD_OUT_HIGH);

	if (IS_ERR(priv->gpio_lineout_sel)) {

		dev_err(dev, "Failed to get line out selection GPIO\n");

		return PTR_ERR(priv->gpio_lineout_sel);

	}



	ret = snd_soc_of_parse_card_name(card, "model");

	if (ret < 0) {

		dev_err(dev, "Card name is not specified\n");

		return ret;

	}



	ret = snd_soc_of_parse_audio_routing(card, "samsung,audio-routing");

	if (ret < 0) {

		dev_err(dev, "Audio routing invalid/unspecified\n");

		return ret;

	}



	cpu = of_get_child_by_name(dev->of_node, "cpu");

	if (!cpu)

		return -EINVAL;



	codec = of_get_child_by_name(dev->of_node, "codec");

	if (!codec) {

		of_node_put(cpu);

		return -EINVAL;

	}



	cpu_dai_node = of_parse_phandle(cpu, "sound-dai", 0);

	of_node_put(cpu);

	if (!cpu_dai_node) {

		dev_err(dev, "parsing cpu/sound-dai failed\n");

		of_node_put(codec);

		return -EINVAL;

	}



	codec_dai_node = of_parse_phandle(codec, "sound-dai", 0);

	of_node_put(codec);

	if (!codec_dai_node) {

		dev_err(dev, "audio-codec property invalid/missing\n");

		ret = -EINVAL;

		goto put_cpu_dai_node;

	}



	for_each_card_prelinks(card, i, dai_link) {

		dai_link->codecs->of_node = codec_dai_node;

		dai_link->cpus->of_node = cpu_dai_node;

		dai_link->platforms->of_node = cpu_dai_node;

	}



	ret = devm_snd_soc_register_component(dev, &midas_component,

			midas_ext_dai, ARRAY_SIZE(midas_ext_dai));

	if (ret < 0) {

		dev_err(dev, "Failed to register component: %d\n", ret);

		goto put_codec_dai_node;

	}



	ret = devm_snd_soc_register_card(dev, card);

	if (ret < 0) {

		dev_err(dev, "Failed to register card: %d\n", ret);

		goto put_codec_dai_node;

	}



	return 0;



put_codec_dai_node:

	of_node_put(codec_dai_node);

put_cpu_dai_node:

	of_node_put(cpu_dai_node);

	return ret;

}



static const struct of_device_id midas_of_match[] = {

	{ .compatible = "samsung,midas-audio" },

	{ },

};

MODULE_DEVICE_TABLE(of, midas_of_match);



static struct platform_driver midas_driver = {

	.driver = {

		.name = "midas-audio",

		.of_match_table = midas_of_match,

		.owner = THIS_MODULE,

		.pm = &snd_soc_pm_ops,

	},

	.probe = midas_probe,

};

module_platform_driver(midas_driver);



MODULE_AUTHOR("Simon Shields <simon@lineageos.org>");

MODULE_DESCRIPTION("ASoC support for Midas");

MODULE_LICENSE("GPL v2");

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