text: // SPDX-License-Identifier: GPL-2.0-only
  /*
  * tegra_rt5677.c - Tegra machine ASoC driver for boards using RT5677 codec.
   *
   * Copyright (c) 2014, The Chromium OS Authors.  All rights reserved.
   *
   * Based on code copyright/by:
   *
   * Copyright (C) 2010-2012 - NVIDIA, Inc.
   * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net>
   * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
   * Copyright 2007 Wolfson Microelectronics PLC.
   */
  
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/slab.h>
  #include <linux/gpio.h>
  #include <linux/of_gpio.h>
  
  #include <sound/core.h>
  #include <sound/jack.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/soc.h>
  
  #include "../codecs/rt5677.h"
  
  #include "tegra_asoc_utils.h"
  
  #define DRV_NAME "tegra-snd-rt5677"
  
  struct tegra_rt5677 {
  	struct tegra_asoc_utils_data util_data;
  	int gpio_hp_det;
  	int gpio_hp_en;
  	int gpio_mic_present;
  	int gpio_dmic_clk_en;
  };
  
  static int tegra_rt5677_asoc_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);
  	struct snd_soc_card *card = rtd->card;
  	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
  	int srate, mclk, err;
  
  	srate = params_rate(params);
  	mclk = 256 * srate;
  
  	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  	if (err < 0) {
  		dev_err(card->dev, "Can't configure clocks\n");
  		return err;
  	}
  
  	err = snd_soc_dai_set_sysclk(codec_dai, RT5677_SCLK_S_MCLK, mclk,
  					SND_SOC_CLOCK_IN);
  	if (err < 0) {
  		dev_err(card->dev, "codec_dai clock not set\n");
  		return err;
  	}
  
  	return 0;
  }
  
  static int tegra_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 tegra_rt5677 *machine = snd_soc_card_get_drvdata(card);
  
  	if (!gpio_is_valid(machine->gpio_hp_en))
  		return 0;
  
  	gpio_set_value_cansleep(machine->gpio_hp_en,
  		SND_SOC_DAPM_EVENT_ON(event));
  
  	return 0;
  }
  
  static const struct snd_soc_ops tegra_rt5677_ops = {
  	.hw_params = tegra_rt5677_asoc_hw_params,
  };
  
  static struct snd_soc_jack tegra_rt5677_hp_jack;
  
  static struct snd_soc_jack_pin tegra_rt5677_hp_jack_pins = {
  	.pin = "Headphone",
  	.mask = SND_JACK_HEADPHONE,
  };
  static struct snd_soc_jack_gpio tegra_rt5677_hp_jack_gpio = {
  	.name = "Headphone detection",
  	.report = SND_JACK_HEADPHONE,
  	.debounce_time = 150,
  };
  
  static struct snd_soc_jack tegra_rt5677_mic_jack;
  
  static struct snd_soc_jack_pin tegra_rt5677_mic_jack_pins = {
  	.pin = "Headset Mic",
  	.mask = SND_JACK_MICROPHONE,
  };
  
  static struct snd_soc_jack_gpio tegra_rt5677_mic_jack_gpio = {
  	.name = "Headset Mic detection",
  	.report = SND_JACK_MICROPHONE,
  	.debounce_time = 150,
  	.invert = 1
  };
  
  static const struct snd_soc_dapm_widget tegra_rt5677_dapm_widgets[] = {
  	SND_SOC_DAPM_SPK("Speaker", NULL),
  	SND_SOC_DAPM_HP("Headphone", tegra_rt5677_event_hp),
  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  	SND_SOC_DAPM_MIC("Internal Mic 1", NULL),
  	SND_SOC_DAPM_MIC("Internal Mic 2", NULL),
  };
  
  static const struct snd_kcontrol_new tegra_rt5677_controls[] = {
  	SOC_DAPM_PIN_SWITCH("Speaker"),
  	SOC_DAPM_PIN_SWITCH("Headphone"),
  	SOC_DAPM_PIN_SWITCH("Headset Mic"),
  	SOC_DAPM_PIN_SWITCH("Internal Mic 1"),
  	SOC_DAPM_PIN_SWITCH("Internal Mic 2"),
  };
  
  static int tegra_rt5677_asoc_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct tegra_rt5677 *machine = snd_soc_card_get_drvdata(rtd->card);
  
  	snd_soc_card_jack_new(rtd->card, "Headphone Jack", SND_JACK_HEADPHONE,
  			      &tegra_rt5677_hp_jack,
  			      &tegra_rt5677_hp_jack_pins, 1);
  
  	if (gpio_is_valid(machine->gpio_hp_det)) {
  		tegra_rt5677_hp_jack_gpio.gpio = machine->gpio_hp_det;
  		snd_soc_jack_add_gpios(&tegra_rt5677_hp_jack, 1,
  				&tegra_rt5677_hp_jack_gpio);
  	}
  
  
  	snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
  			      &tegra_rt5677_mic_jack,
  			      &tegra_rt5677_mic_jack_pins, 1);
  
  	if (gpio_is_valid(machine->gpio_mic_present)) {
  		tegra_rt5677_mic_jack_gpio.gpio = machine->gpio_mic_present;
  		snd_soc_jack_add_gpios(&tegra_rt5677_mic_jack, 1,
  				&tegra_rt5677_mic_jack_gpio);
  	}
  
  	snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "MICBIAS1");
  
  	return 0;
  }
  
  SND_SOC_DAILINK_DEFS(pcm,
  	DAILINK_COMP_ARRAY(COMP_EMPTY()),
  	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "rt5677-aif1")),
  	DAILINK_COMP_ARRAY(COMP_EMPTY()));
  
  static struct snd_soc_dai_link tegra_rt5677_dai = {
  	.name = "RT5677",
  	.stream_name = "RT5677 PCM",
  	.init = tegra_rt5677_asoc_init,
  	.ops = &tegra_rt5677_ops,
  	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  			SND_SOC_DAIFMT_CBS_CFS,
  	SND_SOC_DAILINK_REG(pcm),
  };
  
  static struct snd_soc_card snd_soc_tegra_rt5677 = {
  	.name = "tegra-rt5677",
  	.driver_name = "tegra",
  	.owner = THIS_MODULE,
  	.dai_link = &tegra_rt5677_dai,
  	.num_links = 1,
  	.controls = tegra_rt5677_controls,
  	.num_controls = ARRAY_SIZE(tegra_rt5677_controls),
  	.dapm_widgets = tegra_rt5677_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(tegra_rt5677_dapm_widgets),
  	.fully_routed = true,
  };
  
  static int tegra_rt5677_probe(struct platform_device *pdev)
  {
  	struct device_node *np = pdev->dev.of_node;
  	struct snd_soc_card *card = &snd_soc_tegra_rt5677;
  	struct tegra_rt5677 *machine;
  	int ret;
  
  	machine = devm_kzalloc(&pdev->dev,
  			sizeof(struct tegra_rt5677), GFP_KERNEL);
  	if (!machine)
  		return -ENOMEM;
  
  	card->dev = &pdev->dev;
  	snd_soc_card_set_drvdata(card, machine);
  
  	machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
  	if (machine->gpio_hp_det == -EPROBE_DEFER)
  		return -EPROBE_DEFER;
  
  	machine->gpio_mic_present = of_get_named_gpio(np,
  			"nvidia,mic-present-gpios", 0);
  	if (machine->gpio_mic_present == -EPROBE_DEFER)
  		return -EPROBE_DEFER;
  
  	machine->gpio_hp_en = of_get_named_gpio(np, "nvidia,hp-en-gpios", 0);
  	if (machine->gpio_hp_en == -EPROBE_DEFER)
  		return -EPROBE_DEFER;
  	if (gpio_is_valid(machine->gpio_hp_en)) {
  		ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_en,
  				GPIOF_OUT_INIT_LOW, "hp_en");
  		if (ret) {
  			dev_err(card->dev, "cannot get hp_en gpio\n");
  			return ret;
  		}
  	}
  
  	machine->gpio_dmic_clk_en = of_get_named_gpio(np,
  		"nvidia,dmic-clk-en-gpios", 0);
  	if (machine->gpio_dmic_clk_en == -EPROBE_DEFER)
  		return -EPROBE_DEFER;
  	if (gpio_is_valid(machine->gpio_dmic_clk_en)) {
  		ret = devm_gpio_request_one(&pdev->dev,
  				machine->gpio_dmic_clk_en,
  				GPIOF_OUT_INIT_HIGH, "dmic_clk_en");
  		if (ret) {
  			dev_err(card->dev, "cannot get dmic_clk_en gpio\n");
  			return ret;
  		}
  	}
  
  	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
  	if (ret)
  		goto err;
  
  	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
  	if (ret)
  		goto err;
  
  	tegra_rt5677_dai.codecs->of_node = of_parse_phandle(np,
  			"nvidia,audio-codec", 0);
  	if (!tegra_rt5677_dai.codecs->of_node) {
  		dev_err(&pdev->dev,
  			"Property 'nvidia,audio-codec' missing or invalid\n");
  		ret = -EINVAL;
  		goto err;
  	}
  
  	tegra_rt5677_dai.cpus->of_node = of_parse_phandle(np,
  			"nvidia,i2s-controller", 0);
  	if (!tegra_rt5677_dai.cpus->of_node) {
  		dev_err(&pdev->dev,
  			"Property 'nvidia,i2s-controller' missing or invalid\n");
  		ret = -EINVAL;
  		goto err_put_codec_of_node;
  	}
  	tegra_rt5677_dai.platforms->of_node = tegra_rt5677_dai.cpus->of_node;
  
  	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
  	if (ret)
  		goto err_put_cpu_of_node;
  
  	ret = snd_soc_register_card(card);
  	if (ret) {
  		dev_err_probe(&pdev->dev, ret,
  			      "snd_soc_register_card failed\n");
  		goto err_put_cpu_of_node;
  	}
  
  	return 0;
  
  err_put_cpu_of_node:
  	of_node_put(tegra_rt5677_dai.cpus->of_node);
  	tegra_rt5677_dai.cpus->of_node = NULL;
  	tegra_rt5677_dai.platforms->of_node = NULL;
  err_put_codec_of_node:
  	of_node_put(tegra_rt5677_dai.codecs->of_node);
  	tegra_rt5677_dai.codecs->of_node = NULL;
  err:
  	return ret;
  }
  
  static int tegra_rt5677_remove(struct platform_device *pdev)
  {
  	struct snd_soc_card *card = platform_get_drvdata(pdev);
  
  	snd_soc_unregister_card(card);
  
  	tegra_rt5677_dai.platforms->of_node = NULL;
  	of_node_put(tegra_rt5677_dai.codecs->of_node);
  	tegra_rt5677_dai.codecs->of_node = NULL;
  	of_node_put(tegra_rt5677_dai.cpus->of_node);
  	tegra_rt5677_dai.cpus->of_node = NULL;
  
  	return 0;
  }
  
  static const struct of_device_id tegra_rt5677_of_match[] = {
  	{ .compatible = "nvidia,tegra-audio-rt5677", },
  	{},
  };
  
  static struct platform_driver tegra_rt5677_driver = {
  	.driver = {
  		.name = DRV_NAME,
  		.pm = &snd_soc_pm_ops,
  		.of_match_table = tegra_rt5677_of_match,
  	},
  	.probe = tegra_rt5677_probe,
  	.remove = tegra_rt5677_remove,
  };
  module_platform_driver(tegra_rt5677_driver);
  
  MODULE_AUTHOR("Anatol Pomozov <anatol@google.com>");
  MODULE_DESCRIPTION("Tegra+RT5677 machine ASoC driver");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:" DRV_NAME);
  MODULE_DEVICE_TABLE(of, tegra_rt5677_of_match);
  