sound/soc/intel/boards/bdw-rt5677.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * ASoC machine driver for Intel Broadwell platforms with RT5677 codec
  *
  * Copyright (c) 2014, The Chromium OS Authors.  All rights reserved.
  */

 #include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/pcm_params.h>
 #include <sound/jack.h>
 #include <sound/soc-acpi.h>

 #include "../../codecs/rt5677.h"

 struct bdw_rt5677_priv {
 	struct gpio_desc *gpio_hp_en;
 	struct snd_soc_component *component;
 };

 static int bdw_rt5677_event_hp(struct snd_soc_dapm_widget *w,
 			struct snd_kcontrol *k, int event)
 {
 	struct snd_soc_dapm_context *dapm = w->dapm;
 	struct snd_soc_card *card = dapm->card;
 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);

 	if (SND_SOC_DAPM_EVENT_ON(event))
 		msleep(70);

 	gpiod_set_value_cansleep(bdw_rt5677->gpio_hp_en,
 		SND_SOC_DAPM_EVENT_ON(event));

 	return 0;
 }

 static const struct snd_soc_dapm_widget bdw_rt5677_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone", bdw_rt5677_event_hp),
 	SND_SOC_DAPM_SPK("Speaker", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 	SND_SOC_DAPM_MIC("Local DMICs", NULL),
 	SND_SOC_DAPM_MIC("Remote DMICs", NULL),
 };

 static const struct snd_soc_dapm_route bdw_rt5677_map[] = {
 	/* Speakers */
 	{"Speaker", NULL, "PDM1L"},
 	{"Speaker", NULL, "PDM1R"},

 	/* Headset jack connectors */
 	{"Headphone", NULL, "LOUT1"},
 	{"Headphone", NULL, "LOUT2"},
 	{"IN1P", NULL, "Headset Mic"},
 	{"IN1N", NULL, "Headset Mic"},

 	/* Digital MICs
 	 * Local DMICs: the two DMICs on the mainboard
 	 * Remote DMICs: the two DMICs on the camera module
 	 */
 	{"DMIC L1", NULL, "Remote DMICs"},
 	{"DMIC R1", NULL, "Remote DMICs"},
 	{"DMIC L2", NULL, "Local DMICs"},
 	{"DMIC R2", NULL, "Local DMICs"},

 	/* CODEC BE connections */
 	{"SSP0 CODEC IN", NULL, "AIF1 Capture"},
 	{"AIF1 Playback", NULL, "SSP0 CODEC OUT"},
 	{"DSP Capture", NULL, "DSP Buffer"},

 	/* DSP Clock Connections */
 	{ "DSP Buffer", NULL, "SSP0 CODEC IN" },
 	{ "SSP0 CODEC IN", NULL, "DSPTX" },
 };

 static const struct snd_kcontrol_new bdw_rt5677_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Speaker"),
 	SOC_DAPM_PIN_SWITCH("Headphone"),
 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
 	SOC_DAPM_PIN_SWITCH("Local DMICs"),
 	SOC_DAPM_PIN_SWITCH("Remote DMICs"),
 };


 static struct snd_soc_jack headphone_jack;
 static struct snd_soc_jack mic_jack;

 static struct snd_soc_jack_pin headphone_jack_pin = {
 	.pin	= "Headphone",
 	.mask	= SND_JACK_HEADPHONE,
 };

 static struct snd_soc_jack_pin mic_jack_pin = {
 	.pin	= "Headset Mic",
 	.mask	= SND_JACK_MICROPHONE,
 };

 static struct snd_soc_jack_gpio headphone_jack_gpio = {
 	.name			= "plug-det",
 	.report			= SND_JACK_HEADPHONE,
 	.debounce_time		= 200,
 };

 static struct snd_soc_jack_gpio mic_jack_gpio = {
 	.name			= "mic-present",
 	.report			= SND_JACK_MICROPHONE,
 	.debounce_time		= 200,
 	.invert			= 1,
 };

 /* GPIO indexes defined by ACPI */
 enum {
 	RT5677_GPIO_PLUG_DET		= 0,
 	RT5677_GPIO_MIC_PRESENT_L	= 1,
 	RT5677_GPIO_HOTWORD_DET_L	= 2,
 	RT5677_GPIO_DSP_INT		= 3,
 	RT5677_GPIO_HP_AMP_SHDN_L	= 4,
 };

 static const struct acpi_gpio_params plug_det_gpio = { RT5677_GPIO_PLUG_DET, 0, false };
 static const struct acpi_gpio_params mic_present_gpio = { RT5677_GPIO_MIC_PRESENT_L, 0, false };
 static const struct acpi_gpio_params headphone_enable_gpio = { RT5677_GPIO_HP_AMP_SHDN_L, 0, false };

 static const struct acpi_gpio_mapping bdw_rt5677_gpios[] = {
 	{ "plug-det-gpios", &plug_det_gpio, 1 },
 	{ "mic-present-gpios", &mic_present_gpio, 1 },
 	{ "headphone-enable-gpios", &headphone_enable_gpio, 1 },
 	{ NULL },
 };

 static int broadwell_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
 			struct snd_pcm_hw_params *params)
 {
 	struct snd_interval *rate = hw_param_interval(params,
 						      SNDRV_PCM_HW_PARAM_RATE);
 	struct snd_interval *chan = hw_param_interval(params,
 						      SNDRV_PCM_HW_PARAM_CHANNELS);

 	/* The ADSP will covert the FE rate to 48k, stereo */
 	rate->min = rate->max = 48000;
 	chan->min = chan->max = 2;

 	/* set SSP0 to 16 bit */
 	params_set_format(params, SNDRV_PCM_FORMAT_S16_LE);
 	return 0;
 }

 static int bdw_rt5677_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;

 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_MCLK, 24576000,
 		SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
 		return ret;
 	}

 	return ret;
 }

 static int bdw_rt5677_dsp_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;

 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_PLL1, 24576000,
 		SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
 		return ret;
 	}
 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5677_PLL1_S_MCLK,
 		24000000, 24576000);
 	if (ret < 0) {
 		dev_err(rtd->dev, "can't set codec pll configuration\n");
 		return ret;
 	}

 	return 0;
 }

 static const struct snd_soc_ops bdw_rt5677_ops = {
 	.hw_params = bdw_rt5677_hw_params,
 };

 static const struct snd_soc_ops bdw_rt5677_dsp_ops = {
 	.hw_params = bdw_rt5677_dsp_hw_params,
 };

 static const unsigned int channels[] = {
 	2,
 };

 static const struct snd_pcm_hw_constraint_list constraints_channels = {
 	.count = ARRAY_SIZE(channels),
 	.list = channels,
 	.mask = 0,
 };

 static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;

 	/* Board supports stereo configuration only */
 	runtime->hw.channels_max = 2;
 	return snd_pcm_hw_constraint_list(runtime, 0,
 					  SNDRV_PCM_HW_PARAM_CHANNELS,
 					  &constraints_channels);
 }

 static const struct snd_soc_ops bdw_rt5677_fe_ops = {
 	.startup = bdw_rt5677_fe_startup,
 };

 static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct bdw_rt5677_priv *bdw_rt5677 =
 			snd_soc_card_get_drvdata(rtd->card);
 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 	int ret;

 	ret = devm_acpi_dev_add_driver_gpios(component->dev, bdw_rt5677_gpios);
 	if (ret)
 		dev_warn(component->dev, "Failed to add driver gpios\n");

 	/* Enable codec ASRC function for Stereo DAC/Stereo1 ADC/DMIC/I2S1.
 	 * The ASRC clock source is clk_i2s1_asrc.
 	 */
 	rt5677_sel_asrc_clk_src(component, RT5677_DA_STEREO_FILTER |
 			RT5677_AD_STEREO1_FILTER | RT5677_I2S1_SOURCE,
 			RT5677_CLK_SEL_I2S1_ASRC);
 	/* Enable codec ASRC function for Mono ADC L.
 	 * The ASRC clock source is clk_sys2_asrc.
 	 */
 	rt5677_sel_asrc_clk_src(component, RT5677_AD_MONO_L_FILTER,
 			RT5677_CLK_SEL_SYS2);

 	/* Request rt5677 GPIO for headphone amp control */
 	bdw_rt5677->gpio_hp_en = gpiod_get(component->dev, "headphone-enable",
 					   GPIOD_OUT_LOW);
 	if (IS_ERR(bdw_rt5677->gpio_hp_en)) {
 		dev_err(component->dev, "Can't find HP_AMP_SHDN_L gpio\n");
 		return PTR_ERR(bdw_rt5677->gpio_hp_en);
 	}

 	/* Create and initialize headphone jack */
 	if (!snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 			SND_JACK_HEADPHONE, &headphone_jack,
 			&headphone_jack_pin, 1)) {
 		headphone_jack_gpio.gpiod_dev = component->dev;
 		if (snd_soc_jack_add_gpios(&headphone_jack, 1,
 				&headphone_jack_gpio))
 			dev_err(component->dev, "Can't add headphone jack gpio\n");
 	} else {
 		dev_err(component->dev, "Can't create headphone jack\n");
 	}

 	/* Create and initialize mic jack */
 	if (!snd_soc_card_jack_new(rtd->card, "Mic Jack",
 			SND_JACK_MICROPHONE, &mic_jack,
 			&mic_jack_pin, 1)) {
 		mic_jack_gpio.gpiod_dev = component->dev;
 		if (snd_soc_jack_add_gpios(&mic_jack, 1, &mic_jack_gpio))
 			dev_err(component->dev, "Can't add mic jack gpio\n");
 	} else {
 		dev_err(component->dev, "Can't create mic jack\n");
 	}
 	bdw_rt5677->component = component;

 	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
 	return 0;
 }

 static void bdw_rt5677_exit(struct snd_soc_pcm_runtime *rtd)
 {
 	struct bdw_rt5677_priv *bdw_rt5677 =
 			snd_soc_card_get_drvdata(rtd->card);

 	/*
 	 * The .exit() can be reached without going through the .init()
 	 * so explicitly test if the gpiod is valid
 	 */
 	if (!IS_ERR_OR_NULL(bdw_rt5677->gpio_hp_en))
 		gpiod_put(bdw_rt5677->gpio_hp_en);
 }

 /* broadwell digital audio interface glue - connects codec <--> CPU */
 SND_SOC_DAILINK_DEF(dummy,
 	DAILINK_COMP_ARRAY(COMP_DUMMY()));

 SND_SOC_DAILINK_DEF(fe,
 	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));

 SND_SOC_DAILINK_DEF(platform,
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("haswell-pcm-audio")));

 SND_SOC_DAILINK_DEF(be,
 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-aif1")));

 SND_SOC_DAILINK_DEF(ssp0_port,
 	    DAILINK_COMP_ARRAY(COMP_CPU("ssp0-port")));

 /* Wake on voice interface */
 SND_SOC_DAILINK_DEFS(dsp,
 	DAILINK_COMP_ARRAY(COMP_CPU("spi-RT5677AA:00")),
 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-dspbuffer")),
 	DAILINK_COMP_ARRAY(COMP_PLATFORM("spi-RT5677AA:00")));

 static struct snd_soc_dai_link bdw_rt5677_dais[] = {
 	/* Front End DAI links */
 	{
 		.name = "System PCM",
 		.stream_name = "System Playback/Capture",
 		.nonatomic = 1,
 		.dynamic = 1,
 		.trigger = {
 			SND_SOC_DPCM_TRIGGER_POST,
 			SND_SOC_DPCM_TRIGGER_POST
 		},
 		.dpcm_capture = 1,
 		.dpcm_playback = 1,
 		.ops = &bdw_rt5677_fe_ops,
 		SND_SOC_DAILINK_REG(fe, dummy, platform),
 	},

 	/* Non-DPCM links */
 	{
 		.name = "Codec DSP",
 		.stream_name = "Wake on Voice",
 		.capture_only = 1,
 		.ops = &bdw_rt5677_dsp_ops,
 		SND_SOC_DAILINK_REG(dsp),
 	},

 	/* Back End DAI links */
 	{
 		/* SSP0 - Codec */
 		.name = "Codec",
 		.id = 0,
 		.no_pcm = 1,
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 			SND_SOC_DAIFMT_CBS_CFS,
 		.ignore_pmdown_time = 1,
 		.be_hw_params_fixup = broadwell_ssp0_fixup,
 		.ops = &bdw_rt5677_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		.init = bdw_rt5677_init,
 		.exit = bdw_rt5677_exit,
 		SND_SOC_DAILINK_REG(ssp0_port, be, platform),
 	},
 };

 static int bdw_rt5677_suspend_pre(struct snd_soc_card *card)
 {
 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
 	struct snd_soc_dapm_context *dapm;

 	if (bdw_rt5677->component) {
 		dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
 		snd_soc_dapm_disable_pin(dapm, "MICBIAS1");
 	}
 	return 0;
 }

 static int bdw_rt5677_resume_post(struct snd_soc_card *card)
 {
 	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
 	struct snd_soc_dapm_context *dapm;

 	if (bdw_rt5677->component) {
 		dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
 		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
 	}
 	return 0;
 }

 #if IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
 /* use space before codec name to simplify card ID, and simplify driver name */
 #define CARD_NAME "bdw rt5677" /* card name will be 'sof-bdw rt5677' */
 #define DRIVER_NAME "SOF"
 #else
 #define CARD_NAME "bdw-rt5677"
 #define DRIVER_NAME NULL /* card name will be used for driver name */
 #endif

 /* ASoC machine driver for Broadwell DSP + RT5677 */
 static struct snd_soc_card bdw_rt5677_card = {
 	.name = CARD_NAME,
 	.driver_name = DRIVER_NAME,
 	.owner = THIS_MODULE,
 	.dai_link = bdw_rt5677_dais,
 	.num_links = ARRAY_SIZE(bdw_rt5677_dais),
 	.dapm_widgets = bdw_rt5677_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(bdw_rt5677_widgets),
 	.dapm_routes = bdw_rt5677_map,
 	.num_dapm_routes = ARRAY_SIZE(bdw_rt5677_map),
 	.controls = bdw_rt5677_controls,
 	.num_controls = ARRAY_SIZE(bdw_rt5677_controls),
 	.fully_routed = true,
 	.suspend_pre = bdw_rt5677_suspend_pre,
 	.resume_post = bdw_rt5677_resume_post,
 };

 static int bdw_rt5677_probe(struct platform_device *pdev)
 {
 	struct bdw_rt5677_priv *bdw_rt5677;
 	struct snd_soc_acpi_mach *mach;
 	int ret;

 	bdw_rt5677_card.dev = &pdev->dev;

 	/* Allocate driver private struct */
 	bdw_rt5677 = devm_kzalloc(&pdev->dev, sizeof(struct bdw_rt5677_priv),
 		GFP_KERNEL);
 	if (!bdw_rt5677) {
 		dev_err(&pdev->dev, "Can't allocate bdw_rt5677\n");
 		return -ENOMEM;
 	}

 	/* override plaform name, if required */
 	mach = pdev->dev.platform_data;
 	ret = snd_soc_fixup_dai_links_platform_name(&bdw_rt5677_card,
 						    mach->mach_params.platform);
 	if (ret)
 		return ret;

 	snd_soc_card_set_drvdata(&bdw_rt5677_card, bdw_rt5677);

 	return devm_snd_soc_register_card(&pdev->dev, &bdw_rt5677_card);
 }

 static struct platform_driver bdw_rt5677_audio = {
 	.probe = bdw_rt5677_probe,
 	.driver = {
 		.name = "bdw-rt5677",
 	},
 };

 module_platform_driver(bdw_rt5677_audio)

 /* Module information */
 MODULE_AUTHOR("Ben Zhang");
 MODULE_DESCRIPTION("Intel Broadwell RT5677 machine driver");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:bdw-rt5677");
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* ASoC machine driver for Intel Broadwell platforms with RT5677 codec
	*
	* Copyright (c) 2014, The Chromium OS Authors. All rights reserved.
	*/

	#include <linux/acpi.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/gpio/consumer.h>
	#include <linux/delay.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>
	#include <sound/pcm_params.h>
	#include <sound/jack.h>
	#include <sound/soc-acpi.h>

	#include "../../codecs/rt5677.h"

	struct bdw_rt5677_priv {
	struct gpio_desc *gpio_hp_en;
	struct snd_soc_component *component;
	};

	static int bdw_rt5677_event_hp(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *k, int event)
	{
	struct snd_soc_dapm_context *dapm = w->dapm;
	struct snd_soc_card *card = dapm->card;
	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);

	if (SND_SOC_DAPM_EVENT_ON(event))
	msleep(70);

	gpiod_set_value_cansleep(bdw_rt5677->gpio_hp_en,
	SND_SOC_DAPM_EVENT_ON(event));

	return 0;
	}

	static const struct snd_soc_dapm_widget bdw_rt5677_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", bdw_rt5677_event_hp),
	SND_SOC_DAPM_SPK("Speaker", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Local DMICs", NULL),
	SND_SOC_DAPM_MIC("Remote DMICs", NULL),
	};

	static const struct snd_soc_dapm_route bdw_rt5677_map[] = {
	/* Speakers */
	{"Speaker", NULL, "PDM1L"},
	{"Speaker", NULL, "PDM1R"},

	/* Headset jack connectors */
	{"Headphone", NULL, "LOUT1"},
	{"Headphone", NULL, "LOUT2"},
	{"IN1P", NULL, "Headset Mic"},
	{"IN1N", NULL, "Headset Mic"},

	/* Digital MICs
	* Local DMICs: the two DMICs on the mainboard
	* Remote DMICs: the two DMICs on the camera module
	*/
	{"DMIC L1", NULL, "Remote DMICs"},
	{"DMIC R1", NULL, "Remote DMICs"},
	{"DMIC L2", NULL, "Local DMICs"},
	{"DMIC R2", NULL, "Local DMICs"},

	/* CODEC BE connections */
	{"SSP0 CODEC IN", NULL, "AIF1 Capture"},
	{"AIF1 Playback", NULL, "SSP0 CODEC OUT"},
	{"DSP Capture", NULL, "DSP Buffer"},

	/* DSP Clock Connections */
	{ "DSP Buffer", NULL, "SSP0 CODEC IN" },
	{ "SSP0 CODEC IN", NULL, "DSPTX" },
	};

	static const struct snd_kcontrol_new bdw_rt5677_controls[] = {
	SOC_DAPM_PIN_SWITCH("Speaker"),
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Local DMICs"),
	SOC_DAPM_PIN_SWITCH("Remote DMICs"),
	};


	static struct snd_soc_jack headphone_jack;
	static struct snd_soc_jack mic_jack;

	static struct snd_soc_jack_pin headphone_jack_pin = {
	.pin = "Headphone",
	.mask = SND_JACK_HEADPHONE,
	};

	static struct snd_soc_jack_pin mic_jack_pin = {
	.pin = "Headset Mic",
	.mask = SND_JACK_MICROPHONE,
	};

	static struct snd_soc_jack_gpio headphone_jack_gpio = {
	.name = "plug-det",
	.report = SND_JACK_HEADPHONE,
	.debounce_time = 200,
	};

	static struct snd_soc_jack_gpio mic_jack_gpio = {
	.name = "mic-present",
	.report = SND_JACK_MICROPHONE,
	.debounce_time = 200,
	.invert = 1,
	};

	/* GPIO indexes defined by ACPI */
	enum {
	RT5677_GPIO_PLUG_DET = 0,
	RT5677_GPIO_MIC_PRESENT_L = 1,
	RT5677_GPIO_HOTWORD_DET_L = 2,
	RT5677_GPIO_DSP_INT = 3,
	RT5677_GPIO_HP_AMP_SHDN_L = 4,
	};

	static const struct acpi_gpio_params plug_det_gpio = { RT5677_GPIO_PLUG_DET, 0, false };
	static const struct acpi_gpio_params mic_present_gpio = { RT5677_GPIO_MIC_PRESENT_L, 0, false };
	static const struct acpi_gpio_params headphone_enable_gpio = { RT5677_GPIO_HP_AMP_SHDN_L, 0, false };

	static const struct acpi_gpio_mapping bdw_rt5677_gpios[] = {
	{ "plug-det-gpios", &plug_det_gpio, 1 },
	{ "mic-present-gpios", &mic_present_gpio, 1 },
	{ "headphone-enable-gpios", &headphone_enable_gpio, 1 },
	{ NULL },
	};

	static int broadwell_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
	struct snd_pcm_hw_params *params)
	{
	struct snd_interval *rate = hw_param_interval(params,
	SNDRV_PCM_HW_PARAM_RATE);
	struct snd_interval *chan = hw_param_interval(params,
	SNDRV_PCM_HW_PARAM_CHANNELS);

	/* The ADSP will covert the FE rate to 48k, stereo */
	rate->min = rate->max = 48000;
	chan->min = chan->max = 2;

	/* set SSP0 to 16 bit */
	params_set_format(params, SNDRV_PCM_FORMAT_S16_LE);
	return 0;
	}

	static int bdw_rt5677_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;

	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_MCLK, 24576000,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	dev_err(rtd->dev, "can't set codec sysclk configuration\n");
	return ret;
	}

	return ret;
	}

	static int bdw_rt5677_dsp_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;

	ret = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_PLL1, 24576000,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	dev_err(rtd->dev, "can't set codec sysclk configuration\n");
	return ret;
	}
	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5677_PLL1_S_MCLK,
	24000000, 24576000);
	if (ret < 0) {
	dev_err(rtd->dev, "can't set codec pll configuration\n");
	return ret;
	}

	return 0;
	}

	static const struct snd_soc_ops bdw_rt5677_ops = {
	.hw_params = bdw_rt5677_hw_params,
	};

	static const struct snd_soc_ops bdw_rt5677_dsp_ops = {
	.hw_params = bdw_rt5677_dsp_hw_params,
	};

	static const unsigned int channels[] = {
	2,
	};

	static const struct snd_pcm_hw_constraint_list constraints_channels = {
	.count = ARRAY_SIZE(channels),
	.list = channels,
	.mask = 0,
	};

	static int bdw_rt5677_fe_startup(struct snd_pcm_substream *substream)
	{
	struct snd_pcm_runtime *runtime = substream->runtime;

	/* Board supports stereo configuration only */
	runtime->hw.channels_max = 2;
	return snd_pcm_hw_constraint_list(runtime, 0,
	SNDRV_PCM_HW_PARAM_CHANNELS,
	&constraints_channels);
	}

	static const struct snd_soc_ops bdw_rt5677_fe_ops = {
	.startup = bdw_rt5677_fe_startup,
	};

	static int bdw_rt5677_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct bdw_rt5677_priv *bdw_rt5677 =
	snd_soc_card_get_drvdata(rtd->card);
	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
	int ret;

	ret = devm_acpi_dev_add_driver_gpios(component->dev, bdw_rt5677_gpios);
	if (ret)
	dev_warn(component->dev, "Failed to add driver gpios\n");

	/* Enable codec ASRC function for Stereo DAC/Stereo1 ADC/DMIC/I2S1.
	* The ASRC clock source is clk_i2s1_asrc.
	*/
	rt5677_sel_asrc_clk_src(component, RT5677_DA_STEREO_FILTER \|
	RT5677_AD_STEREO1_FILTER \| RT5677_I2S1_SOURCE,
	RT5677_CLK_SEL_I2S1_ASRC);
	/* Enable codec ASRC function for Mono ADC L.
	* The ASRC clock source is clk_sys2_asrc.
	*/
	rt5677_sel_asrc_clk_src(component, RT5677_AD_MONO_L_FILTER,
	RT5677_CLK_SEL_SYS2);

	/* Request rt5677 GPIO for headphone amp control */
	bdw_rt5677->gpio_hp_en = gpiod_get(component->dev, "headphone-enable",
	GPIOD_OUT_LOW);
	if (IS_ERR(bdw_rt5677->gpio_hp_en)) {
	dev_err(component->dev, "Can't find HP_AMP_SHDN_L gpio\n");
	return PTR_ERR(bdw_rt5677->gpio_hp_en);
	}

	/* Create and initialize headphone jack */
	if (!snd_soc_card_jack_new(rtd->card, "Headphone Jack",
	SND_JACK_HEADPHONE, &headphone_jack,
	&headphone_jack_pin, 1)) {
	headphone_jack_gpio.gpiod_dev = component->dev;
	if (snd_soc_jack_add_gpios(&headphone_jack, 1,
	&headphone_jack_gpio))
	dev_err(component->dev, "Can't add headphone jack gpio\n");
	} else {
	dev_err(component->dev, "Can't create headphone jack\n");
	}

	/* Create and initialize mic jack */
	if (!snd_soc_card_jack_new(rtd->card, "Mic Jack",
	SND_JACK_MICROPHONE, &mic_jack,
	&mic_jack_pin, 1)) {
	mic_jack_gpio.gpiod_dev = component->dev;
	if (snd_soc_jack_add_gpios(&mic_jack, 1, &mic_jack_gpio))
	dev_err(component->dev, "Can't add mic jack gpio\n");
	} else {
	dev_err(component->dev, "Can't create mic jack\n");
	}
	bdw_rt5677->component = component;

	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
	return 0;
	}

	static void bdw_rt5677_exit(struct snd_soc_pcm_runtime *rtd)
	{
	struct bdw_rt5677_priv *bdw_rt5677 =
	snd_soc_card_get_drvdata(rtd->card);

	/*
	* The .exit() can be reached without going through the .init()
	* so explicitly test if the gpiod is valid
	*/
	if (!IS_ERR_OR_NULL(bdw_rt5677->gpio_hp_en))
	gpiod_put(bdw_rt5677->gpio_hp_en);
	}

	/* broadwell digital audio interface glue - connects codec <--> CPU */
	SND_SOC_DAILINK_DEF(dummy,
	DAILINK_COMP_ARRAY(COMP_DUMMY()));

	SND_SOC_DAILINK_DEF(fe,
	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));

	SND_SOC_DAILINK_DEF(platform,
	DAILINK_COMP_ARRAY(COMP_PLATFORM("haswell-pcm-audio")));

	SND_SOC_DAILINK_DEF(be,
	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-aif1")));

	SND_SOC_DAILINK_DEF(ssp0_port,
	DAILINK_COMP_ARRAY(COMP_CPU("ssp0-port")));

	/* Wake on voice interface */
	SND_SOC_DAILINK_DEFS(dsp,
	DAILINK_COMP_ARRAY(COMP_CPU("spi-RT5677AA:00")),
	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-RT5677CE:00", "rt5677-dspbuffer")),
	DAILINK_COMP_ARRAY(COMP_PLATFORM("spi-RT5677AA:00")));

	static struct snd_soc_dai_link bdw_rt5677_dais[] = {
	/* Front End DAI links */
	{
	.name = "System PCM",
	.stream_name = "System Playback/Capture",
	.nonatomic = 1,
	.dynamic = 1,
	.trigger = {
	SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST
	},
	.dpcm_capture = 1,
	.dpcm_playback = 1,
	.ops = &bdw_rt5677_fe_ops,
	SND_SOC_DAILINK_REG(fe, dummy, platform),
	},

	/* Non-DPCM links */
	{
	.name = "Codec DSP",
	.stream_name = "Wake on Voice",
	.capture_only = 1,
	.ops = &bdw_rt5677_dsp_ops,
	SND_SOC_DAILINK_REG(dsp),
	},

	/* Back End DAI links */
	{
	/* SSP0 - Codec */
	.name = "Codec",
	.id = 0,
	.no_pcm = 1,
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
	SND_SOC_DAIFMT_CBS_CFS,
	.ignore_pmdown_time = 1,
	.be_hw_params_fixup = broadwell_ssp0_fixup,
	.ops = &bdw_rt5677_ops,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	.init = bdw_rt5677_init,
	.exit = bdw_rt5677_exit,
	SND_SOC_DAILINK_REG(ssp0_port, be, platform),
	},
	};

	static int bdw_rt5677_suspend_pre(struct snd_soc_card *card)
	{
	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
	struct snd_soc_dapm_context *dapm;

	if (bdw_rt5677->component) {
	dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
	snd_soc_dapm_disable_pin(dapm, "MICBIAS1");
	}
	return 0;
	}

	static int bdw_rt5677_resume_post(struct snd_soc_card *card)
	{
	struct bdw_rt5677_priv *bdw_rt5677 = snd_soc_card_get_drvdata(card);
	struct snd_soc_dapm_context *dapm;

	if (bdw_rt5677->component) {
	dapm = snd_soc_component_get_dapm(bdw_rt5677->component);
	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
	}
	return 0;
	}

	#if IS_ENABLED(CONFIG_SND_SOC_SOF_BROADWELL)
	/* use space before codec name to simplify card ID, and simplify driver name */
	#define CARD_NAME "bdw rt5677" /* card name will be 'sof-bdw rt5677' */
	#define DRIVER_NAME "SOF"
	#else
	#define CARD_NAME "bdw-rt5677"
	#define DRIVER_NAME NULL /* card name will be used for driver name */
	#endif

	/* ASoC machine driver for Broadwell DSP + RT5677 */
	static struct snd_soc_card bdw_rt5677_card = {
	.name = CARD_NAME,
	.driver_name = DRIVER_NAME,
	.owner = THIS_MODULE,
	.dai_link = bdw_rt5677_dais,
	.num_links = ARRAY_SIZE(bdw_rt5677_dais),
	.dapm_widgets = bdw_rt5677_widgets,
	.num_dapm_widgets = ARRAY_SIZE(bdw_rt5677_widgets),
	.dapm_routes = bdw_rt5677_map,
	.num_dapm_routes = ARRAY_SIZE(bdw_rt5677_map),
	.controls = bdw_rt5677_controls,
	.num_controls = ARRAY_SIZE(bdw_rt5677_controls),
	.fully_routed = true,
	.suspend_pre = bdw_rt5677_suspend_pre,
	.resume_post = bdw_rt5677_resume_post,
	};

	static int bdw_rt5677_probe(struct platform_device *pdev)
	{
	struct bdw_rt5677_priv *bdw_rt5677;
	struct snd_soc_acpi_mach *mach;
	int ret;

	bdw_rt5677_card.dev = &pdev->dev;

	/* Allocate driver private struct */
	bdw_rt5677 = devm_kzalloc(&pdev->dev, sizeof(struct bdw_rt5677_priv),
	GFP_KERNEL);
	if (!bdw_rt5677) {
	dev_err(&pdev->dev, "Can't allocate bdw_rt5677\n");
	return -ENOMEM;
	}

	/* override plaform name, if required */
	mach = pdev->dev.platform_data;
	ret = snd_soc_fixup_dai_links_platform_name(&bdw_rt5677_card,
	mach->mach_params.platform);
	if (ret)
	return ret;

	snd_soc_card_set_drvdata(&bdw_rt5677_card, bdw_rt5677);

	return devm_snd_soc_register_card(&pdev->dev, &bdw_rt5677_card);
	}

	static struct platform_driver bdw_rt5677_audio = {
	.probe = bdw_rt5677_probe,
	.driver = {
	.name = "bdw-rt5677",
	},
	};

	module_platform_driver(bdw_rt5677_audio)

	/* Module information */
	MODULE_AUTHOR("Ben Zhang");
	MODULE_DESCRIPTION("Intel Broadwell RT5677 machine driver");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("platform:bdw-rt5677");