sound/soc/mediatek/mt2701/mt2701-cs42448.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * mt2701-cs42448.c  --  MT2701 CS42448 ALSA SoC machine driver
  *
  * Copyright (c) 2016 MediaTek Inc.
  * Author: Ir Lian <ir.lian@mediatek.com>
  *	   Garlic Tseng <garlic.tseng@mediatek.com>
  */

 #include <linux/module.h>
 #include <sound/soc.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/of_gpio.h>

 #include "mt2701-afe-common.h"

 struct mt2701_cs42448_private {
 	int i2s1_in_mux;
 	int i2s1_in_mux_gpio_sel_1;
 	int i2s1_in_mux_gpio_sel_2;
 };

 static const char * const i2sin_mux_switch_text[] = {
 	"ADC_SDOUT2",
 	"ADC_SDOUT3",
 	"I2S_IN_1",
 	"I2S_IN_2",
 };

 static const struct soc_enum i2sin_mux_enum =
 	SOC_ENUM_SINGLE_EXT(4, i2sin_mux_switch_text);

 static int mt2701_cs42448_i2sin1_mux_get(struct snd_kcontrol *kcontrol,
 					 struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);

 	ucontrol->value.integer.value[0] = priv->i2s1_in_mux;
 	return 0;
 }

 static int mt2701_cs42448_i2sin1_mux_set(struct snd_kcontrol *kcontrol,
 					 struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
 	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);

 	if (ucontrol->value.integer.value[0] == priv->i2s1_in_mux)
 		return 0;

 	switch (ucontrol->value.integer.value[0]) {
 	case 0:
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
 		break;
 	case 1:
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
 		break;
 	case 2:
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
 		break;
 	case 3:
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
 		gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
 		break;
 	default:
 		dev_warn(card->dev, "%s invalid setting\n", __func__);
 	}

 	priv->i2s1_in_mux = ucontrol->value.integer.value[0];
 	return 0;
 }

 static const struct snd_soc_dapm_widget
 			mt2701_cs42448_asoc_card_dapm_widgets[] = {
 	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
 	SND_SOC_DAPM_MIC("AMIC", NULL),
 	SND_SOC_DAPM_LINE("Tuner In", NULL),
 	SND_SOC_DAPM_LINE("Satellite Tuner In", NULL),
 	SND_SOC_DAPM_LINE("AUX In", NULL),
 };

 static const struct snd_kcontrol_new mt2701_cs42448_controls[] = {
 	SOC_DAPM_PIN_SWITCH("Line Out Jack"),
 	SOC_DAPM_PIN_SWITCH("AMIC"),
 	SOC_DAPM_PIN_SWITCH("Tuner In"),
 	SOC_DAPM_PIN_SWITCH("Satellite Tuner In"),
 	SOC_DAPM_PIN_SWITCH("AUX In"),
 	SOC_ENUM_EXT("I2SIN1_MUX_Switch", i2sin_mux_enum,
 		     mt2701_cs42448_i2sin1_mux_get,
 		     mt2701_cs42448_i2sin1_mux_set),
 };

 static const unsigned int mt2701_cs42448_sampling_rates[] = {48000};

 static const struct snd_pcm_hw_constraint_list mt2701_cs42448_constraints_rates = {
 		.count = ARRAY_SIZE(mt2701_cs42448_sampling_rates),
 		.list = mt2701_cs42448_sampling_rates,
 		.mask = 0,
 };

 static int mt2701_cs42448_fe_ops_startup(struct snd_pcm_substream *substream)
 {
 	int err;

 	err = snd_pcm_hw_constraint_list(substream->runtime, 0,
 					 SNDRV_PCM_HW_PARAM_RATE,
 					 &mt2701_cs42448_constraints_rates);
 	if (err < 0) {
 		dev_err(substream->pcm->card->dev,
 			"%s snd_pcm_hw_constraint_list failed: 0x%x\n",
 			__func__, err);
 		return err;
 	}
 	return 0;
 }

 static const struct snd_soc_ops mt2701_cs42448_48k_fe_ops = {
 	.startup = mt2701_cs42448_fe_ops_startup,
 };

 static int mt2701_cs42448_be_ops_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 *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 	unsigned int mclk_rate;
 	unsigned int rate = params_rate(params);
 	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
 	unsigned int div_bck_over_lrck = 64;

 	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;

 	/* mt2701 mclk */
 	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);

 	/* codec mclk */
 	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);

 	return 0;
 }

 static const struct snd_soc_ops mt2701_cs42448_be_ops = {
 	.hw_params = mt2701_cs42448_be_ops_hw_params
 };

 enum {
 	DAI_LINK_FE_MULTI_CH_OUT,
 	DAI_LINK_FE_PCM0_IN,
 	DAI_LINK_FE_PCM1_IN,
 	DAI_LINK_FE_BT_OUT,
 	DAI_LINK_FE_BT_IN,
 	DAI_LINK_BE_I2S0,
 	DAI_LINK_BE_I2S1,
 	DAI_LINK_BE_I2S2,
 	DAI_LINK_BE_I2S3,
 	DAI_LINK_BE_MRG_BT,
 };

 SND_SOC_DAILINK_DEFS(fe_multi_ch_out,
 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_multi")),
 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(fe_pcm0_in,
 	DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(fe_pcm1_in,
 	DAILINK_COMP_ARRAY(COMP_CPU("PCM1")),
 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(fe_bt_out,
 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_DL")),
 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(fe_bt_in,
 	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_UL")),
 	DAILINK_COMP_ARRAY(COMP_DUMMY()),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(be_i2s0,
 	DAILINK_COMP_ARRAY(COMP_CPU("I2S0")),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(be_i2s1,
 	DAILINK_COMP_ARRAY(COMP_CPU("I2S1")),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(be_i2s2,
 	DAILINK_COMP_ARRAY(COMP_CPU("I2S2")),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(be_i2s3,
 	DAILINK_COMP_ARRAY(COMP_CPU("I2S3")),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 SND_SOC_DAILINK_DEFS(be_mrg_bt,
 	DAILINK_COMP_ARRAY(COMP_CPU("MRG BT")),
 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "bt-sco-pcm-wb")),
 	DAILINK_COMP_ARRAY(COMP_EMPTY()));

 static struct snd_soc_dai_link mt2701_cs42448_dai_links[] = {
 	/* FE */
 	[DAI_LINK_FE_MULTI_CH_OUT] = {
 		.name = "mt2701-cs42448-multi-ch-out",
 		.stream_name = "mt2701-cs42448-multi-ch-out",
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
 			    SND_SOC_DPCM_TRIGGER_POST},
 		.ops = &mt2701_cs42448_48k_fe_ops,
 		.dynamic = 1,
 		.dpcm_playback = 1,
 		SND_SOC_DAILINK_REG(fe_multi_ch_out),
 	},
 	[DAI_LINK_FE_PCM0_IN] = {
 		.name = "mt2701-cs42448-pcm0",
 		.stream_name = "mt2701-cs42448-pcm0-data-UL",
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
 			    SND_SOC_DPCM_TRIGGER_POST},
 		.ops = &mt2701_cs42448_48k_fe_ops,
 		.dynamic = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(fe_pcm0_in),
 	},
 	[DAI_LINK_FE_PCM1_IN] = {
 		.name = "mt2701-cs42448-pcm1-data-UL",
 		.stream_name = "mt2701-cs42448-pcm1-data-UL",
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
 			    SND_SOC_DPCM_TRIGGER_POST},
 		.ops = &mt2701_cs42448_48k_fe_ops,
 		.dynamic = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(fe_pcm1_in),
 	},
 	[DAI_LINK_FE_BT_OUT] = {
 		.name = "mt2701-cs42448-pcm-BT-out",
 		.stream_name = "mt2701-cs42448-pcm-BT",
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
 			    SND_SOC_DPCM_TRIGGER_POST},
 		.dynamic = 1,
 		.dpcm_playback = 1,
 		SND_SOC_DAILINK_REG(fe_bt_out),
 	},
 	[DAI_LINK_FE_BT_IN] = {
 		.name = "mt2701-cs42448-pcm-BT-in",
 		.stream_name = "mt2701-cs42448-pcm-BT",
 		.trigger = {SND_SOC_DPCM_TRIGGER_POST,
 			    SND_SOC_DPCM_TRIGGER_POST},
 		.dynamic = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(fe_bt_in),
 	},
 	/* BE */
 	[DAI_LINK_BE_I2S0] = {
 		.name = "mt2701-cs42448-I2S0",
 		.no_pcm = 1,
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
 			 | SND_SOC_DAIFMT_GATED,
 		.ops = &mt2701_cs42448_be_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(be_i2s0),
 	},
 	[DAI_LINK_BE_I2S1] = {
 		.name = "mt2701-cs42448-I2S1",
 		.no_pcm = 1,
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
 			 | SND_SOC_DAIFMT_GATED,
 		.ops = &mt2701_cs42448_be_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(be_i2s1),
 	},
 	[DAI_LINK_BE_I2S2] = {
 		.name = "mt2701-cs42448-I2S2",
 		.no_pcm = 1,
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
 			 | SND_SOC_DAIFMT_GATED,
 		.ops = &mt2701_cs42448_be_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(be_i2s2),
 	},
 	[DAI_LINK_BE_I2S3] = {
 		.name = "mt2701-cs42448-I2S3",
 		.no_pcm = 1,
 		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS
 			 | SND_SOC_DAIFMT_GATED,
 		.ops = &mt2701_cs42448_be_ops,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(be_i2s3),
 	},
 	[DAI_LINK_BE_MRG_BT] = {
 		.name = "mt2701-cs42448-MRG-BT",
 		.no_pcm = 1,
 		.dpcm_playback = 1,
 		.dpcm_capture = 1,
 		SND_SOC_DAILINK_REG(be_mrg_bt),
 	},
 };

 static struct snd_soc_card mt2701_cs42448_soc_card = {
 	.name = "mt2701-cs42448",
 	.owner = THIS_MODULE,
 	.dai_link = mt2701_cs42448_dai_links,
 	.num_links = ARRAY_SIZE(mt2701_cs42448_dai_links),
 	.controls = mt2701_cs42448_controls,
 	.num_controls = ARRAY_SIZE(mt2701_cs42448_controls),
 	.dapm_widgets = mt2701_cs42448_asoc_card_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(mt2701_cs42448_asoc_card_dapm_widgets),
 };

 static int mt2701_cs42448_machine_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = &mt2701_cs42448_soc_card;
 	int ret;
 	int i;
 	struct device_node *platform_node, *codec_node, *codec_node_bt_mrg;
 	struct mt2701_cs42448_private *priv =
 		devm_kzalloc(&pdev->dev, sizeof(struct mt2701_cs42448_private),
 			     GFP_KERNEL);
 	struct device *dev = &pdev->dev;
 	struct snd_soc_dai_link *dai_link;

 	if (!priv)
 		return -ENOMEM;

 	platform_node = of_parse_phandle(pdev->dev.of_node,
 					 "mediatek,platform", 0);
 	if (!platform_node) {
 		dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
 		return -EINVAL;
 	}
 	for_each_card_prelinks(card, i, dai_link) {
 		if (dai_link->platforms->name)
 			continue;
 		dai_link->platforms->of_node = platform_node;
 	}

 	card->dev = dev;

 	codec_node = of_parse_phandle(pdev->dev.of_node,
 				      "mediatek,audio-codec", 0);
 	if (!codec_node) {
 		dev_err(&pdev->dev,
 			"Property 'audio-codec' missing or invalid\n");
 		return -EINVAL;
 	}
 	for_each_card_prelinks(card, i, dai_link) {
 		if (dai_link->codecs->name)
 			continue;
 		dai_link->codecs->of_node = codec_node;
 	}

 	codec_node_bt_mrg = of_parse_phandle(pdev->dev.of_node,
 					     "mediatek,audio-codec-bt-mrg", 0);
 	if (!codec_node_bt_mrg) {
 		dev_err(&pdev->dev,
 			"Property 'audio-codec-bt-mrg' missing or invalid\n");
 		return -EINVAL;
 	}
 	mt2701_cs42448_dai_links[DAI_LINK_BE_MRG_BT].codecs->of_node
 							= codec_node_bt_mrg;

 	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
 	if (ret) {
 		dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
 		return ret;
 	}

 	priv->i2s1_in_mux_gpio_sel_1 =
 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio1", 0);
 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_1)) {
 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_1,
 					"i2s1_in_mux_gpio_sel_1");
 		if (ret)
 			dev_warn(&pdev->dev, "%s devm_gpio_request fail %d\n",
 				 __func__, ret);
 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_1, 0);
 	}

 	priv->i2s1_in_mux_gpio_sel_2 =
 		of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio2", 0);
 	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_2)) {
 		ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_2,
 					"i2s1_in_mux_gpio_sel_2");
 		if (ret)
 			dev_warn(&pdev->dev, "%s devm_gpio_request fail2 %d\n",
 				 __func__, ret);
 		gpio_direction_output(priv->i2s1_in_mux_gpio_sel_2, 0);
 	}
 	snd_soc_card_set_drvdata(card, priv);

 	ret = devm_snd_soc_register_card(&pdev->dev, card);

 	if (ret)
 		dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
 			__func__, ret);
 	return ret;
 }

 #ifdef CONFIG_OF
 static const struct of_device_id mt2701_cs42448_machine_dt_match[] = {
 	{.compatible = "mediatek,mt2701-cs42448-machine",},
 	{}
 };
 MODULE_DEVICE_TABLE(of, mt2701_cs42448_machine_dt_match);
 #endif

 static struct platform_driver mt2701_cs42448_machine = {
 	.driver = {
 		.name = "mt2701-cs42448",
 		   #ifdef CONFIG_OF
 		   .of_match_table = mt2701_cs42448_machine_dt_match,
 		   #endif
 	},
 	.probe = mt2701_cs42448_machine_probe,
 };

 module_platform_driver(mt2701_cs42448_machine);

 /* Module information */
 MODULE_DESCRIPTION("MT2701 CS42448 ALSA SoC machine driver");
 MODULE_AUTHOR("Ir Lian <ir.lian@mediatek.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("mt2701 cs42448 soc card");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* mt2701-cs42448.c -- MT2701 CS42448 ALSA SoC machine driver
	*
	* Copyright (c) 2016 MediaTek Inc.
	* Author: Ir Lian <ir.lian@mediatek.com>
	* Garlic Tseng <garlic.tseng@mediatek.com>
	*/

	#include <linux/module.h>
	#include <sound/soc.h>
	#include <linux/delay.h>
	#include <linux/gpio.h>
	#include <linux/pinctrl/consumer.h>
	#include <linux/of_gpio.h>

	#include "mt2701-afe-common.h"

	struct mt2701_cs42448_private {
	int i2s1_in_mux;
	int i2s1_in_mux_gpio_sel_1;
	int i2s1_in_mux_gpio_sel_2;
	};

	static const char * const i2sin_mux_switch_text[] = {
	"ADC_SDOUT2",
	"ADC_SDOUT3",
	"I2S_IN_1",
	"I2S_IN_2",
	};

	static const struct soc_enum i2sin_mux_enum =
	SOC_ENUM_SINGLE_EXT(4, i2sin_mux_switch_text);

	static int mt2701_cs42448_i2sin1_mux_get(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);

	ucontrol->value.integer.value[0] = priv->i2s1_in_mux;
	return 0;
	}

	static int mt2701_cs42448_i2sin1_mux_set(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
	struct mt2701_cs42448_private *priv = snd_soc_card_get_drvdata(card);

	if (ucontrol->value.integer.value[0] == priv->i2s1_in_mux)
	return 0;

	switch (ucontrol->value.integer.value[0]) {
	case 0:
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
	break;
	case 1:
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 0);
	break;
	case 2:
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 0);
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
	break;
	case 3:
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_1, 1);
	gpio_set_value(priv->i2s1_in_mux_gpio_sel_2, 1);
	break;
	default:
	dev_warn(card->dev, "%s invalid setting\n", __func__);
	}

	priv->i2s1_in_mux = ucontrol->value.integer.value[0];
	return 0;
	}

	static const struct snd_soc_dapm_widget
	mt2701_cs42448_asoc_card_dapm_widgets[] = {
	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
	SND_SOC_DAPM_MIC("AMIC", NULL),
	SND_SOC_DAPM_LINE("Tuner In", NULL),
	SND_SOC_DAPM_LINE("Satellite Tuner In", NULL),
	SND_SOC_DAPM_LINE("AUX In", NULL),
	};

	static const struct snd_kcontrol_new mt2701_cs42448_controls[] = {
	SOC_DAPM_PIN_SWITCH("Line Out Jack"),
	SOC_DAPM_PIN_SWITCH("AMIC"),
	SOC_DAPM_PIN_SWITCH("Tuner In"),
	SOC_DAPM_PIN_SWITCH("Satellite Tuner In"),
	SOC_DAPM_PIN_SWITCH("AUX In"),
	SOC_ENUM_EXT("I2SIN1_MUX_Switch", i2sin_mux_enum,
	mt2701_cs42448_i2sin1_mux_get,
	mt2701_cs42448_i2sin1_mux_set),
	};

	static const unsigned int mt2701_cs42448_sampling_rates[] = {48000};

	static const struct snd_pcm_hw_constraint_list mt2701_cs42448_constraints_rates = {
	.count = ARRAY_SIZE(mt2701_cs42448_sampling_rates),
	.list = mt2701_cs42448_sampling_rates,
	.mask = 0,
	};

	static int mt2701_cs42448_fe_ops_startup(struct snd_pcm_substream *substream)
	{
	int err;

	err = snd_pcm_hw_constraint_list(substream->runtime, 0,
	SNDRV_PCM_HW_PARAM_RATE,
	&mt2701_cs42448_constraints_rates);
	if (err < 0) {
	dev_err(substream->pcm->card->dev,
	"%s snd_pcm_hw_constraint_list failed: 0x%x\n",
	__func__, err);
	return err;
	}
	return 0;
	}

	static const struct snd_soc_ops mt2701_cs42448_48k_fe_ops = {
	.startup = mt2701_cs42448_fe_ops_startup,
	};

	static int mt2701_cs42448_be_ops_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 *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
	unsigned int mclk_rate;
	unsigned int rate = params_rate(params);
	unsigned int div_mclk_over_bck = rate > 192000 ? 2 : 4;
	unsigned int div_bck_over_lrck = 64;

	mclk_rate = rate * div_bck_over_lrck * div_mclk_over_bck;

	/* mt2701 mclk */
	snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, SND_SOC_CLOCK_OUT);

	/* codec mclk */
	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, SND_SOC_CLOCK_IN);

	return 0;
	}

	static const struct snd_soc_ops mt2701_cs42448_be_ops = {
	.hw_params = mt2701_cs42448_be_ops_hw_params
	};

	enum {
	DAI_LINK_FE_MULTI_CH_OUT,
	DAI_LINK_FE_PCM0_IN,
	DAI_LINK_FE_PCM1_IN,
	DAI_LINK_FE_BT_OUT,
	DAI_LINK_FE_BT_IN,
	DAI_LINK_BE_I2S0,
	DAI_LINK_BE_I2S1,
	DAI_LINK_BE_I2S2,
	DAI_LINK_BE_I2S3,
	DAI_LINK_BE_MRG_BT,
	};

	SND_SOC_DAILINK_DEFS(fe_multi_ch_out,
	DAILINK_COMP_ARRAY(COMP_CPU("PCM_multi")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(fe_pcm0_in,
	DAILINK_COMP_ARRAY(COMP_CPU("PCM0")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(fe_pcm1_in,
	DAILINK_COMP_ARRAY(COMP_CPU("PCM1")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(fe_bt_out,
	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_DL")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(fe_bt_in,
	DAILINK_COMP_ARRAY(COMP_CPU("PCM_BT_UL")),
	DAILINK_COMP_ARRAY(COMP_DUMMY()),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(be_i2s0,
	DAILINK_COMP_ARRAY(COMP_CPU("I2S0")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(be_i2s1,
	DAILINK_COMP_ARRAY(COMP_CPU("I2S1")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(be_i2s2,
	DAILINK_COMP_ARRAY(COMP_CPU("I2S2")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(be_i2s3,
	DAILINK_COMP_ARRAY(COMP_CPU("I2S3")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "cs42448")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	SND_SOC_DAILINK_DEFS(be_mrg_bt,
	DAILINK_COMP_ARRAY(COMP_CPU("MRG BT")),
	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "bt-sco-pcm-wb")),
	DAILINK_COMP_ARRAY(COMP_EMPTY()));

	static struct snd_soc_dai_link mt2701_cs42448_dai_links[] = {
	/* FE */
	[DAI_LINK_FE_MULTI_CH_OUT] = {
	.name = "mt2701-cs42448-multi-ch-out",
	.stream_name = "mt2701-cs42448-multi-ch-out",
	.trigger = {SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST},
	.ops = &mt2701_cs42448_48k_fe_ops,
	.dynamic = 1,
	.dpcm_playback = 1,
	SND_SOC_DAILINK_REG(fe_multi_ch_out),
	},
	[DAI_LINK_FE_PCM0_IN] = {
	.name = "mt2701-cs42448-pcm0",
	.stream_name = "mt2701-cs42448-pcm0-data-UL",
	.trigger = {SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST},
	.ops = &mt2701_cs42448_48k_fe_ops,
	.dynamic = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(fe_pcm0_in),
	},
	[DAI_LINK_FE_PCM1_IN] = {
	.name = "mt2701-cs42448-pcm1-data-UL",
	.stream_name = "mt2701-cs42448-pcm1-data-UL",
	.trigger = {SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST},
	.ops = &mt2701_cs42448_48k_fe_ops,
	.dynamic = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(fe_pcm1_in),
	},
	[DAI_LINK_FE_BT_OUT] = {
	.name = "mt2701-cs42448-pcm-BT-out",
	.stream_name = "mt2701-cs42448-pcm-BT",
	.trigger = {SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST},
	.dynamic = 1,
	.dpcm_playback = 1,
	SND_SOC_DAILINK_REG(fe_bt_out),
	},
	[DAI_LINK_FE_BT_IN] = {
	.name = "mt2701-cs42448-pcm-BT-in",
	.stream_name = "mt2701-cs42448-pcm-BT",
	.trigger = {SND_SOC_DPCM_TRIGGER_POST,
	SND_SOC_DPCM_TRIGGER_POST},
	.dynamic = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(fe_bt_in),
	},
	/* BE */
	[DAI_LINK_BE_I2S0] = {
	.name = "mt2701-cs42448-I2S0",
	.no_pcm = 1,
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS
	\| SND_SOC_DAIFMT_GATED,
	.ops = &mt2701_cs42448_be_ops,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(be_i2s0),
	},
	[DAI_LINK_BE_I2S1] = {
	.name = "mt2701-cs42448-I2S1",
	.no_pcm = 1,
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS
	\| SND_SOC_DAIFMT_GATED,
	.ops = &mt2701_cs42448_be_ops,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(be_i2s1),
	},
	[DAI_LINK_BE_I2S2] = {
	.name = "mt2701-cs42448-I2S2",
	.no_pcm = 1,
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS
	\| SND_SOC_DAIFMT_GATED,
	.ops = &mt2701_cs42448_be_ops,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(be_i2s2),
	},
	[DAI_LINK_BE_I2S3] = {
	.name = "mt2701-cs42448-I2S3",
	.no_pcm = 1,
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_CBS_CFS
	\| SND_SOC_DAIFMT_GATED,
	.ops = &mt2701_cs42448_be_ops,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(be_i2s3),
	},
	[DAI_LINK_BE_MRG_BT] = {
	.name = "mt2701-cs42448-MRG-BT",
	.no_pcm = 1,
	.dpcm_playback = 1,
	.dpcm_capture = 1,
	SND_SOC_DAILINK_REG(be_mrg_bt),
	},
	};

	static struct snd_soc_card mt2701_cs42448_soc_card = {
	.name = "mt2701-cs42448",
	.owner = THIS_MODULE,
	.dai_link = mt2701_cs42448_dai_links,
	.num_links = ARRAY_SIZE(mt2701_cs42448_dai_links),
	.controls = mt2701_cs42448_controls,
	.num_controls = ARRAY_SIZE(mt2701_cs42448_controls),
	.dapm_widgets = mt2701_cs42448_asoc_card_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(mt2701_cs42448_asoc_card_dapm_widgets),
	};

	static int mt2701_cs42448_machine_probe(struct platform_device *pdev)
	{
	struct snd_soc_card *card = &mt2701_cs42448_soc_card;
	int ret;
	int i;
	struct device_node platform_node, codec_node, *codec_node_bt_mrg;
	struct mt2701_cs42448_private *priv =
	devm_kzalloc(&pdev->dev, sizeof(struct mt2701_cs42448_private),
	GFP_KERNEL);
	struct device *dev = &pdev->dev;
	struct snd_soc_dai_link *dai_link;

	if (!priv)
	return -ENOMEM;

	platform_node = of_parse_phandle(pdev->dev.of_node,
	"mediatek,platform", 0);
	if (!platform_node) {
	dev_err(&pdev->dev, "Property 'platform' missing or invalid\n");
	return -EINVAL;
	}
	for_each_card_prelinks(card, i, dai_link) {
	if (dai_link->platforms->name)
	continue;
	dai_link->platforms->of_node = platform_node;
	}

	card->dev = dev;

	codec_node = of_parse_phandle(pdev->dev.of_node,
	"mediatek,audio-codec", 0);
	if (!codec_node) {
	dev_err(&pdev->dev,
	"Property 'audio-codec' missing or invalid\n");
	return -EINVAL;
	}
	for_each_card_prelinks(card, i, dai_link) {
	if (dai_link->codecs->name)
	continue;
	dai_link->codecs->of_node = codec_node;
	}

	codec_node_bt_mrg = of_parse_phandle(pdev->dev.of_node,
	"mediatek,audio-codec-bt-mrg", 0);
	if (!codec_node_bt_mrg) {
	dev_err(&pdev->dev,
	"Property 'audio-codec-bt-mrg' missing or invalid\n");
	return -EINVAL;
	}
	mt2701_cs42448_dai_links[DAI_LINK_BE_MRG_BT].codecs->of_node
	= codec_node_bt_mrg;

	ret = snd_soc_of_parse_audio_routing(card, "audio-routing");
	if (ret) {
	dev_err(&pdev->dev, "failed to parse audio-routing: %d\n", ret);
	return ret;
	}

	priv->i2s1_in_mux_gpio_sel_1 =
	of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio1", 0);
	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_1)) {
	ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_1,
	"i2s1_in_mux_gpio_sel_1");
	if (ret)
	dev_warn(&pdev->dev, "%s devm_gpio_request fail %d\n",
	__func__, ret);
	gpio_direction_output(priv->i2s1_in_mux_gpio_sel_1, 0);
	}

	priv->i2s1_in_mux_gpio_sel_2 =
	of_get_named_gpio(dev->of_node, "i2s1-in-sel-gpio2", 0);
	if (gpio_is_valid(priv->i2s1_in_mux_gpio_sel_2)) {
	ret = devm_gpio_request(dev, priv->i2s1_in_mux_gpio_sel_2,
	"i2s1_in_mux_gpio_sel_2");
	if (ret)
	dev_warn(&pdev->dev, "%s devm_gpio_request fail2 %d\n",
	__func__, ret);
	gpio_direction_output(priv->i2s1_in_mux_gpio_sel_2, 0);
	}
	snd_soc_card_set_drvdata(card, priv);

	ret = devm_snd_soc_register_card(&pdev->dev, card);

	if (ret)
	dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
	__func__, ret);
	return ret;
	}

	#ifdef CONFIG_OF
	static const struct of_device_id mt2701_cs42448_machine_dt_match[] = {
	{.compatible = "mediatek,mt2701-cs42448-machine",},
	{}
	};
	MODULE_DEVICE_TABLE(of, mt2701_cs42448_machine_dt_match);
	#endif

	static struct platform_driver mt2701_cs42448_machine = {
	.driver = {
	.name = "mt2701-cs42448",
	#ifdef CONFIG_OF
	.of_match_table = mt2701_cs42448_machine_dt_match,
	#endif
	},
	.probe = mt2701_cs42448_machine_probe,
	};

	module_platform_driver(mt2701_cs42448_machine);

	/* Module information */
	MODULE_DESCRIPTION("MT2701 CS42448 ALSA SoC machine driver");
	MODULE_AUTHOR("Ir Lian <ir.lian@mediatek.com>");
	MODULE_LICENSE("GPL v2");
	MODULE_ALIAS("mt2701 cs42448 soc card");