text: /*
   *  cht-bsw-max98090.c - ASoc Machine driver for Intel Cherryview-based
   *  platforms Cherrytrail and Braswell, with max98090 & TI codec.
   *
   *  Copyright (C) 2015 Intel Corp
   *  Author: Fang, Yang A <yang.a.fang@intel.com>
   *  This file is modified from cht_bsw_rt5645.c
   *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   *
   *  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 <linux/acpi.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/soc.h>
  #include <sound/jack.h>
  #include "../../codecs/max98090.h"
  #include "../atom/sst-atom-controls.h"
  #include "../../codecs/ts3a227e.h"
  
  #define CHT_PLAT_CLK_3_HZ	19200000
  #define CHT_CODEC_DAI	"HiFi"
  
  struct cht_mc_private {
  	struct snd_soc_jack jack;
  	bool ts3a227e_present;
  };
  
  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 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),
  };
  
  static const struct snd_soc_dapm_route cht_audio_map[] = {
  	{"IN34", NULL, "Headset Mic"},
  	{"Headset Mic", NULL, "MICBIAS"},
  	{"DMICL", NULL, "Int Mic"},
  	{"Headphone", NULL, "HPL"},
  	{"Headphone", NULL, "HPR"},
  	{"Ext Spk", NULL, "SPKL"},
  	{"Ext Spk", NULL, "SPKR"},
  	{"HiFi 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, "HiFi Capture"},
  };
  
  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;
  
  	ret = snd_soc_dai_set_sysclk(codec_dai, M98090_REG_SYSTEM_CLOCK,
  				     CHT_PLAT_CLK_3_HZ, 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_ti_jack_event(struct notifier_block *nb,
  		unsigned long event, void *data)
  {
  	struct snd_soc_jack *jack = (struct snd_soc_jack *)data;
  	struct snd_soc_dapm_context *dapm = &jack->card->dapm;
  
  	if (event & SND_JACK_MICROPHONE) {
  		snd_soc_dapm_force_enable_pin(dapm, "SHDN");
  		snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
  		snd_soc_dapm_sync(dapm);
  	} else {
  		snd_soc_dapm_disable_pin(dapm, "MICBIAS");
  		snd_soc_dapm_disable_pin(dapm, "SHDN");
  		snd_soc_dapm_sync(dapm);
  	}
  
  	return 0;
  }
  
  static struct notifier_block cht_jack_nb = {
  	.notifier_call = cht_ti_jack_event,
  };
  
  static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
  {
  	int ret;
  	int jack_type;
  	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
  	struct snd_soc_jack *jack = &ctx->jack;
  
  	/**
  	* TI supports 4 butons headset detection
  	* KEY_MEDIA
  	* KEY_VOICECOMMAND
  	* KEY_VOLUMEUP
  	* KEY_VOLUMEDOWN
  	*/
  	if (ctx->ts3a227e_present)
  		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE |
  					SND_JACK_BTN_0 | SND_JACK_BTN_1 |
  					SND_JACK_BTN_2 | SND_JACK_BTN_3;
  	else
  		jack_type = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE;
  
  	ret = snd_soc_card_jack_new(runtime->card, "Headset Jack",
  					jack_type, jack, NULL, 0);
  
  	if (ret) {
  		dev_err(runtime->dev, "Headset Jack creation failed %d\n", ret);
  		return ret;
  	}
  
  	if (ctx->ts3a227e_present)
  		snd_soc_jack_notifier_register(jack, &cht_jack_nb);
  
  	return ret;
  }
  
  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);
  	int ret = 0;
  	unsigned int fmt = 0;
  
  	ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 16);
  	if (ret < 0) {
  		dev_err(rtd->dev, "can't set cpu_dai slot fmt: %d\n", ret);
  		return ret;
  	}
  
  	fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF
  				| SND_SOC_DAIFMT_CBS_CFS;
  
  	ret = snd_soc_dai_set_fmt(rtd->cpu_dai, fmt);
  	if (ret < 0) {
  		dev_err(rtd->dev, "can't set cpu_dai set fmt: %d\n", ret);
  		return ret;
  	}
  
  	/* 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 int cht_max98090_headset_init(struct snd_soc_component *component)
  {
  	struct snd_soc_card *card = component->card;
  	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
  
  	return ts3a227e_enable_jack_detect(component, &ctx->jack);
  }
  
  static struct snd_soc_ops cht_aif1_ops = {
  	.startup = cht_aif1_startup,
  };
  
  static struct snd_soc_ops cht_be_ssp2_ops = {
  	.hw_params = cht_aif1_hw_params,
  };
  
  static struct snd_soc_aux_dev cht_max98090_headset_dev = {
  	.name = "Headset Chip",
  	.init = cht_max98090_headset_init,
  	.codec_name = "i2c-104C227E:00",
  };
  
  static struct snd_soc_dai_link cht_dailink[] = {
  	[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 ends */
  	{
  		.name = "SSP2-Codec",
  		.id = 1,
  		.cpu_dai_name = "ssp2-port",
  		.platform_name = "sst-mfld-platform",
  		.no_pcm = 1,
  		.codec_dai_name = "HiFi",
  		.codec_name = "i2c-193C9890:00",
  		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_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,
  	},
  };
  
  /* SoC card */
  static struct snd_soc_card snd_soc_card_cht = {
  	.name = "chtmax98090",
  	.owner = THIS_MODULE,
  	.dai_link = cht_dailink,
  	.num_links = ARRAY_SIZE(cht_dailink),
  	.aux_dev = &cht_max98090_headset_dev,
  	.num_aux_devs = 1,
  	.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),
  };
  
  static int snd_cht_mc_probe(struct platform_device *pdev)
  {
  	int ret_val = 0;
  	struct cht_mc_private *drv;
  
  	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_ATOMIC);
  	if (!drv)
  		return -ENOMEM;
  
  	drv->ts3a227e_present = acpi_dev_found("104C227E");
  	if (!drv->ts3a227e_present) {
  		/* no need probe TI jack detection chip */
  		snd_soc_card_cht.aux_dev = NULL;
  		snd_soc_card_cht.num_aux_devs = 0;
  	}
  
  	/* register the soc card */
  	snd_soc_card_cht.dev = &pdev->dev;
  	snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
  	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-max98090",
  	},
  	.probe = snd_cht_mc_probe,
  };
  
  module_platform_driver(snd_cht_mc_driver)
  
  MODULE_DESCRIPTION("ASoC Intel(R) Braswell Machine driver");
  MODULE_AUTHOR("Fang, Yang A <yang.a.fang@intel.com>");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:cht-bsw-max98090");
  