sound/soc/intel/boards/cht_bsw_rt5672.c - arm/linux - Git at Google

 /*
  *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
  *                     Cherrytrail and Braswell, with RT5672 codec.
  *
  *  Copyright (C) 2014 Intel Corp
  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
  *          Mengdong Lin <mengdong.lin@intel.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; version 2 of the License.
  *
  *  This program is distributed in the hope that it will be useful, but
  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  *  General Public License for more details.
  */

 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/jack.h>
 #include "../../codecs/rt5670.h"
 #include "../atom/sst-atom-controls.h"
 #include "../common/sst-acpi.h"

 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
 #define CHT_PLAT_CLK_3_HZ	19200000
 #define CHT_CODEC_DAI	"rt5670-aif1"

 static struct snd_soc_jack cht_bsw_headset;
 static char cht_bsw_codec_name[16];

 /* Headset jack detection DAPM pins */
 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
 	{
 		.pin = "Headset Mic",
 		.mask = SND_JACK_MICROPHONE,
 	},
 	{
 		.pin = "Headphone",
 		.mask = SND_JACK_HEADPHONE,
 	},
 };

 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
 {
 	struct snd_soc_pcm_runtime *rtd;

 	list_for_each_entry(rtd, &card->rtd_list, list) {
 		if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
 			     strlen(CHT_CODEC_DAI)))
 			return rtd->codec_dai;
 	}
 	return NULL;
 }

 static int platform_clock_control(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 snd_soc_dai *codec_dai;
 	int ret;

 	codec_dai = cht_get_codec_dai(card);
 	if (!codec_dai) {
 		dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
 		return -EIO;
 	}

 	if (SND_SOC_DAPM_EVENT_ON(event)) {
 		/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 		ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 				CHT_PLAT_CLK_3_HZ, 48000 * 512);
 		if (ret < 0) {
 			dev_err(card->dev, "can't set codec pll: %d\n", ret);
 			return ret;
 		}

 		/* set codec sysclk source to PLL */
 		ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 			48000 * 512, SND_SOC_CLOCK_IN);
 		if (ret < 0) {
 			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
 			return ret;
 		}
 	} else {
 		/* Set codec sysclk source to its internal clock because codec
 		 * PLL will be off when idle and MCLK will also be off by ACPI
 		 * when codec is runtime suspended. Codec needs clock for jack
 		 * detection and button press.
 		 */
 		snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
 				       48000 * 512, SND_SOC_CLOCK_IN);
 	}
 	return 0;
 }

 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone", NULL),
 	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 	SND_SOC_DAPM_MIC("Int Mic", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
 			platform_clock_control, SND_SOC_DAPM_PRE_PMU |
 			SND_SOC_DAPM_POST_PMD),
 };

 static const struct snd_soc_dapm_route cht_audio_map[] = {
 	{"IN1P", NULL, "Headset Mic"},
 	{"IN1N", NULL, "Headset Mic"},
 	{"DMIC L1", NULL, "Int Mic"},
 	{"DMIC R1", NULL, "Int Mic"},
 	{"Headphone", NULL, "HPOL"},
 	{"Headphone", NULL, "HPOR"},
 	{"Ext Spk", NULL, "SPOLP"},
 	{"Ext Spk", NULL, "SPOLN"},
 	{"Ext Spk", NULL, "SPORP"},
 	{"Ext Spk", NULL, "SPORN"},
 	{"AIF1 Playback", NULL, "ssp2 Tx"},
 	{"ssp2 Tx", NULL, "codec_out0"},
 	{"ssp2 Tx", NULL, "codec_out1"},
 	{"codec_in0", NULL, "ssp2 Rx"},
 	{"codec_in1", NULL, "ssp2 Rx"},
 	{"ssp2 Rx", NULL, "AIF1 Capture"},
 	{"Headphone", NULL, "Platform Clock"},
 	{"Headset Mic", NULL, "Platform Clock"},
 	{"Int Mic", NULL, "Platform Clock"},
 	{"Ext Spk", NULL, "Platform Clock"},
 };

 static const struct snd_kcontrol_new cht_mc_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Headphone"),
 	SOC_DAPM_PIN_SWITCH("Headset Mic"),
 	SOC_DAPM_PIN_SWITCH("Int Mic"),
 	SOC_DAPM_PIN_SWITCH("Ext Spk"),
 };

 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 					struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	int ret;

 	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 				  CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 	if (ret < 0) {
 		dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 		return ret;
 	}

 	/* set codec sysclk source to PLL */
 	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 				     params_rate(params) * 512,
 				     SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 		return ret;
 	}
 	return 0;
 }

 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 {
 	int ret;
 	struct snd_soc_dai *codec_dai = runtime->codec_dai;
 	struct snd_soc_codec *codec = codec_dai->codec;

 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
 	if (ret < 0) {
 		dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
 		return ret;
 	}

 	/* Select codec ASRC clock source to track I2S1 clock, because codec
 	 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
 	 * be supported by RT5672. Otherwise, ASRC will be disabled and cause
 	 * noise.
 	 */
 	rt5670_sel_asrc_clk_src(codec,
 				RT5670_DA_STEREO_FILTER
 				| RT5670_DA_MONO_L_FILTER
 				| RT5670_DA_MONO_R_FILTER
 				| RT5670_AD_STEREO_FILTER
 				| RT5670_AD_MONO_L_FILTER
 				| RT5670_AD_MONO_R_FILTER,
 				RT5670_CLK_SEL_I2S1_ASRC);

         ret = snd_soc_card_jack_new(runtime->card, "Headset",
                 SND_JACK_HEADSET | SND_JACK_BTN_0 |
                 SND_JACK_BTN_1 | SND_JACK_BTN_2, &cht_bsw_headset,
                 cht_bsw_headset_pins, ARRAY_SIZE(cht_bsw_headset_pins));
         if (ret)
                 return ret;

 	rt5670_set_jack_detect(codec, &cht_bsw_headset);
 	return 0;
 }

 static int cht_codec_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 *channels = hw_param_interval(params,
 						SNDRV_PCM_HW_PARAM_CHANNELS);

 	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
 	rate->min = rate->max = 48000;
 	channels->min = channels->max = 2;

 	/* set SSP2 to 24-bit */
 	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
 	return 0;
 }

 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 {
 	return snd_pcm_hw_constraint_single(substream->runtime,
 			SNDRV_PCM_HW_PARAM_RATE, 48000);
 }

 static const struct snd_soc_ops cht_aif1_ops = {
 	.startup = cht_aif1_startup,
 };

 static const struct snd_soc_ops cht_be_ssp2_ops = {
 	.hw_params = cht_aif1_hw_params,
 };

 static struct snd_soc_dai_link cht_dailink[] = {
 	/* Front End DAI links */
 	[MERR_DPCM_AUDIO] = {
 		.name = "Audio Port",
 		.stream_name = "Audio",
 		.cpu_dai_name = "media-cpu-dai",
 		.codec_dai_name = "snd-soc-dummy-dai",
 		.codec_name = "snd-soc-dummy",
 		.platform_name = "sst-mfld-platform",
 		.nonatomic = true,
 		.dynamic = 1,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		.ops = &cht_aif1_ops,
 	},
 	[MERR_DPCM_DEEP_BUFFER] = {
 		.name = "Deep-Buffer Audio Port",
 		.stream_name = "Deep-Buffer Audio",
 		.cpu_dai_name = "deepbuffer-cpu-dai",
 		.codec_dai_name = "snd-soc-dummy-dai",
 		.codec_name = "snd-soc-dummy",
 		.platform_name = "sst-mfld-platform",
 		.nonatomic = true,
 		.dynamic = 1,
 		.dpcm_playback = 1,
 		.ops = &cht_aif1_ops,
 	},
 	[MERR_DPCM_COMPR] = {
 		.name = "Compressed Port",
 		.stream_name = "Compress",
 		.cpu_dai_name = "compress-cpu-dai",
 		.codec_dai_name = "snd-soc-dummy-dai",
 		.codec_name = "snd-soc-dummy",
 		.platform_name = "sst-mfld-platform",
 	},

 	/* Back End DAI links */
 	{
 		/* SSP2 - Codec */
 		.name = "SSP2-Codec",
 		.id = 1,
 		.cpu_dai_name = "ssp2-port",
 		.platform_name = "sst-mfld-platform",
 		.no_pcm = 1,
 		.nonatomic = true,
 		.codec_dai_name = "rt5670-aif1",
 		.codec_name = "i2c-10EC5670:00",
 		.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
 					| SND_SOC_DAIFMT_CBS_CFS,
 		.init = cht_codec_init,
 		.be_hw_params_fixup = cht_codec_fixup,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		.ops = &cht_be_ssp2_ops,
 	},
 };

 static int cht_suspend_pre(struct snd_soc_card *card)
 {
 	struct snd_soc_component *component;

 	list_for_each_entry(component, &card->component_dev_list, card_list) {
 		if (!strcmp(component->name, "i2c-10EC5670:00")) {
 			struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

 			dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n");
 			rt5670_jack_suspend(codec);
 			break;
 		}
 	}
 	return 0;
 }

 static int cht_resume_post(struct snd_soc_card *card)
 {
 	struct snd_soc_component *component;

 	list_for_each_entry(component, &card->component_dev_list, card_list) {
 		if (!strcmp(component->name, "i2c-10EC5670:00")) {
 			struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

 			dev_dbg(codec->dev, "enabling jack detect for resume.\n");
 			rt5670_jack_resume(codec);
 			break;
 		}
 	}

 	return 0;
 }

 /* SoC card */
 static struct snd_soc_card snd_soc_card_cht = {
 	.name = "cherrytrailcraudio",
 	.owner = THIS_MODULE,
 	.dai_link = cht_dailink,
 	.num_links = ARRAY_SIZE(cht_dailink),
 	.dapm_widgets = cht_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 	.dapm_routes = cht_audio_map,
 	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 	.controls = cht_mc_controls,
 	.num_controls = ARRAY_SIZE(cht_mc_controls),
 	.suspend_pre = cht_suspend_pre,
 	.resume_post = cht_resume_post,
 };

 #define RT5672_I2C_DEFAULT	"i2c-10EC5670:00"

 static int snd_cht_mc_probe(struct platform_device *pdev)
 {
 	int ret_val = 0;
 	struct sst_acpi_mach *mach = pdev->dev.platform_data;
 	const char *i2c_name;
 	int i;

 	strcpy(cht_bsw_codec_name, RT5672_I2C_DEFAULT);

 	/* fixup codec name based on HID */
 	if (mach) {
 		i2c_name = sst_acpi_find_name_from_hid(mach->id);
 		if (i2c_name) {
 			snprintf(cht_bsw_codec_name, sizeof(cht_bsw_codec_name),
 				 "i2c-%s", i2c_name);
 			for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
 				if (!strcmp(cht_dailink[i].codec_name,
 					    RT5672_I2C_DEFAULT)) {
 					cht_dailink[i].codec_name =
 						cht_bsw_codec_name;
 					break;
 				}
 			}
 		}
 	}

 	/* register the soc card */
 	snd_soc_card_cht.dev = &pdev->dev;
 	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 	if (ret_val) {
 		dev_err(&pdev->dev,
 			"snd_soc_register_card failed %d\n", ret_val);
 		return ret_val;
 	}
 	platform_set_drvdata(pdev, &snd_soc_card_cht);
 	return ret_val;
 }

 static struct platform_driver snd_cht_mc_driver = {
 	.driver = {
 		.name = "cht-bsw-rt5672",
 	},
 	.probe = snd_cht_mc_probe,
 };

 module_platform_driver(snd_cht_mc_driver);

 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:cht-bsw-rt5672");
	/*
	* cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
	* Cherrytrail and Braswell, with RT5672 codec.
	*
	* Copyright (C) 2014 Intel Corp
	* Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
	* Mengdong Lin <mengdong.lin@intel.com>
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; version 2 of the License.
	*
	* This program is distributed in the hope that it will be useful, but
	* WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*/

	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/slab.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/jack.h>
	#include "../../codecs/rt5670.h"
	#include "../atom/sst-atom-controls.h"
	#include "../common/sst-acpi.h"

	/* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
	#define CHT_PLAT_CLK_3_HZ 19200000
	#define CHT_CODEC_DAI "rt5670-aif1"

	static struct snd_soc_jack cht_bsw_headset;
	static char cht_bsw_codec_name[16];

	/* Headset jack detection DAPM pins */
	static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
	{
	.pin = "Headset Mic",
	.mask = SND_JACK_MICROPHONE,
	},
	{
	.pin = "Headphone",
	.mask = SND_JACK_HEADPHONE,
	},
	};

	static inline struct snd_soc_dai cht_get_codec_dai(struct snd_soc_card card)
	{
	struct snd_soc_pcm_runtime *rtd;

	list_for_each_entry(rtd, &card->rtd_list, list) {
	if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
	strlen(CHT_CODEC_DAI)))
	return rtd->codec_dai;
	}
	return NULL;
	}

	static int platform_clock_control(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 snd_soc_dai *codec_dai;
	int ret;

	codec_dai = cht_get_codec_dai(card);
	if (!codec_dai) {
	dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
	return -EIO;
	}

	if (SND_SOC_DAPM_EVENT_ON(event)) {
	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
	CHT_PLAT_CLK_3_HZ, 48000 * 512);
	if (ret < 0) {
	dev_err(card->dev, "can't set codec pll: %d\n", ret);
	return ret;
	}

	/* set codec sysclk source to PLL */
	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
	48000 * 512, SND_SOC_CLOCK_IN);
	if (ret < 0) {
	dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
	return ret;
	}
	} else {
	/* Set codec sysclk source to its internal clock because codec
	* PLL will be off when idle and MCLK will also be off by ACPI
	* when codec is runtime suspended. Codec needs clock for jack
	* detection and button press.
	*/
	snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
	48000 * 512, SND_SOC_CLOCK_IN);
	}
	return 0;
	}

	static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone", NULL),
	SND_SOC_DAPM_MIC("Headset Mic", NULL),
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
	platform_clock_control, SND_SOC_DAPM_PRE_PMU \|
	SND_SOC_DAPM_POST_PMD),
	};

	static const struct snd_soc_dapm_route cht_audio_map[] = {
	{"IN1P", NULL, "Headset Mic"},
	{"IN1N", NULL, "Headset Mic"},
	{"DMIC L1", NULL, "Int Mic"},
	{"DMIC R1", NULL, "Int Mic"},
	{"Headphone", NULL, "HPOL"},
	{"Headphone", NULL, "HPOR"},
	{"Ext Spk", NULL, "SPOLP"},
	{"Ext Spk", NULL, "SPOLN"},
	{"Ext Spk", NULL, "SPORP"},
	{"Ext Spk", NULL, "SPORN"},
	{"AIF1 Playback", NULL, "ssp2 Tx"},
	{"ssp2 Tx", NULL, "codec_out0"},
	{"ssp2 Tx", NULL, "codec_out1"},
	{"codec_in0", NULL, "ssp2 Rx"},
	{"codec_in1", NULL, "ssp2 Rx"},
	{"ssp2 Rx", NULL, "AIF1 Capture"},
	{"Headphone", NULL, "Platform Clock"},
	{"Headset Mic", NULL, "Platform Clock"},
	{"Int Mic", NULL, "Platform Clock"},
	{"Ext Spk", NULL, "Platform Clock"},
	};

	static const struct snd_kcontrol_new cht_mc_controls[] = {
	SOC_DAPM_PIN_SWITCH("Headphone"),
	SOC_DAPM_PIN_SWITCH("Headset Mic"),
	SOC_DAPM_PIN_SWITCH("Int Mic"),
	SOC_DAPM_PIN_SWITCH("Ext Spk"),
	};

	static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	int ret;

	/* set codec PLL source to the 19.2MHz platform clock (MCLK) */
	ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
	CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
	if (ret < 0) {
	dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
	return ret;
	}

	/* set codec sysclk source to PLL */
	ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
	params_rate(params) * 512,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
	return ret;
	}
	return 0;
	}

	static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
	{
	int ret;
	struct snd_soc_dai *codec_dai = runtime->codec_dai;
	struct snd_soc_codec *codec = codec_dai->codec;

	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
	if (ret < 0) {
	dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
	return ret;
	}

	/* Select codec ASRC clock source to track I2S1 clock, because codec
	* is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
	* be supported by RT5672. Otherwise, ASRC will be disabled and cause
	* noise.
	*/
	rt5670_sel_asrc_clk_src(codec,
	RT5670_DA_STEREO_FILTER
	\| RT5670_DA_MONO_L_FILTER
	\| RT5670_DA_MONO_R_FILTER
	\| RT5670_AD_STEREO_FILTER
	\| RT5670_AD_MONO_L_FILTER
	\| RT5670_AD_MONO_R_FILTER,
	RT5670_CLK_SEL_I2S1_ASRC);

	ret = snd_soc_card_jack_new(runtime->card, "Headset",
	SND_JACK_HEADSET \| SND_JACK_BTN_0 \|
	SND_JACK_BTN_1 \| SND_JACK_BTN_2, &cht_bsw_headset,
	cht_bsw_headset_pins, ARRAY_SIZE(cht_bsw_headset_pins));
	if (ret)
	return ret;

	rt5670_set_jack_detect(codec, &cht_bsw_headset);
	return 0;
	}

	static int cht_codec_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 *channels = hw_param_interval(params,
	SNDRV_PCM_HW_PARAM_CHANNELS);

	/* The DSP will covert the FE rate to 48k, stereo, 24bits */
	rate->min = rate->max = 48000;
	channels->min = channels->max = 2;

	/* set SSP2 to 24-bit */
	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
	return 0;
	}

	static int cht_aif1_startup(struct snd_pcm_substream *substream)
	{
	return snd_pcm_hw_constraint_single(substream->runtime,
	SNDRV_PCM_HW_PARAM_RATE, 48000);
	}

	static const struct snd_soc_ops cht_aif1_ops = {
	.startup = cht_aif1_startup,
	};

	static const struct snd_soc_ops cht_be_ssp2_ops = {
	.hw_params = cht_aif1_hw_params,
	};

	static struct snd_soc_dai_link cht_dailink[] = {
	/* Front End DAI links */
	[MERR_DPCM_AUDIO] = {
	.name = "Audio Port",
	.stream_name = "Audio",
	.cpu_dai_name = "media-cpu-dai",
	.codec_dai_name = "snd-soc-dummy-dai",
	.codec_name = "snd-soc-dummy",
	.platform_name = "sst-mfld-platform",
	.nonatomic = true,
	.dynamic = 1,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	.ops = &cht_aif1_ops,
	},
	[MERR_DPCM_DEEP_BUFFER] = {
	.name = "Deep-Buffer Audio Port",
	.stream_name = "Deep-Buffer Audio",
	.cpu_dai_name = "deepbuffer-cpu-dai",
	.codec_dai_name = "snd-soc-dummy-dai",
	.codec_name = "snd-soc-dummy",
	.platform_name = "sst-mfld-platform",
	.nonatomic = true,
	.dynamic = 1,
	.dpcm_playback = 1,
	.ops = &cht_aif1_ops,
	},
	[MERR_DPCM_COMPR] = {
	.name = "Compressed Port",
	.stream_name = "Compress",
	.cpu_dai_name = "compress-cpu-dai",
	.codec_dai_name = "snd-soc-dummy-dai",
	.codec_name = "snd-soc-dummy",
	.platform_name = "sst-mfld-platform",
	},

	/* Back End DAI links */
	{
	/* SSP2 - Codec */
	.name = "SSP2-Codec",
	.id = 1,
	.cpu_dai_name = "ssp2-port",
	.platform_name = "sst-mfld-platform",
	.no_pcm = 1,
	.nonatomic = true,
	.codec_dai_name = "rt5670-aif1",
	.codec_name = "i2c-10EC5670:00",
	.dai_fmt = SND_SOC_DAIFMT_DSP_B \| SND_SOC_DAIFMT_IB_NF
	\| SND_SOC_DAIFMT_CBS_CFS,
	.init = cht_codec_init,
	.be_hw_params_fixup = cht_codec_fixup,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	.ops = &cht_be_ssp2_ops,
	},
	};

	static int cht_suspend_pre(struct snd_soc_card *card)
	{
	struct snd_soc_component *component;

	list_for_each_entry(component, &card->component_dev_list, card_list) {
	if (!strcmp(component->name, "i2c-10EC5670:00")) {
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n");
	rt5670_jack_suspend(codec);
	break;
	}
	}
	return 0;
	}

	static int cht_resume_post(struct snd_soc_card *card)
	{
	struct snd_soc_component *component;

	list_for_each_entry(component, &card->component_dev_list, card_list) {
	if (!strcmp(component->name, "i2c-10EC5670:00")) {
	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);

	dev_dbg(codec->dev, "enabling jack detect for resume.\n");
	rt5670_jack_resume(codec);
	break;
	}
	}

	return 0;
	}

	/* SoC card */
	static struct snd_soc_card snd_soc_card_cht = {
	.name = "cherrytrailcraudio",
	.owner = THIS_MODULE,
	.dai_link = cht_dailink,
	.num_links = ARRAY_SIZE(cht_dailink),
	.dapm_widgets = cht_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
	.dapm_routes = cht_audio_map,
	.num_dapm_routes = ARRAY_SIZE(cht_audio_map),
	.controls = cht_mc_controls,
	.num_controls = ARRAY_SIZE(cht_mc_controls),
	.suspend_pre = cht_suspend_pre,
	.resume_post = cht_resume_post,
	};

	#define RT5672_I2C_DEFAULT "i2c-10EC5670:00"

	static int snd_cht_mc_probe(struct platform_device *pdev)
	{
	int ret_val = 0;
	struct sst_acpi_mach *mach = pdev->dev.platform_data;
	const char *i2c_name;
	int i;

	strcpy(cht_bsw_codec_name, RT5672_I2C_DEFAULT);

	/* fixup codec name based on HID */
	if (mach) {
	i2c_name = sst_acpi_find_name_from_hid(mach->id);
	if (i2c_name) {
	snprintf(cht_bsw_codec_name, sizeof(cht_bsw_codec_name),
	"i2c-%s", i2c_name);
	for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
	if (!strcmp(cht_dailink[i].codec_name,
	RT5672_I2C_DEFAULT)) {
	cht_dailink[i].codec_name =
	cht_bsw_codec_name;
	break;
	}
	}
	}
	}

	/* register the soc card */
	snd_soc_card_cht.dev = &pdev->dev;
	ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
	if (ret_val) {
	dev_err(&pdev->dev,
	"snd_soc_register_card failed %d\n", ret_val);
	return ret_val;
	}
	platform_set_drvdata(pdev, &snd_soc_card_cht);
	return ret_val;
	}

	static struct platform_driver snd_cht_mc_driver = {
	.driver = {
	.name = "cht-bsw-rt5672",
	},
	.probe = snd_cht_mc_probe,
	};

	module_platform_driver(snd_cht_mc_driver);

	MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
	MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("platform:cht-bsw-rt5672");