text: // 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 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",},
  	{}
  };
  #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");
  