text: /*
   * Intel Broxton-P I2S Machine Driver
   *
   * Copyright (C) 2016, Intel Corporation. All rights reserved.
   *
   * Modified from:
   *   Intel Skylake I2S Machine driver
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License version
   * 2 as published by the Free Software Foundation.
   *
   * 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 <sound/core.h>
  #include <sound/jack.h>
  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/soc.h>
  #include "../../codecs/hdac_hdmi.h"
  #include "../../codecs/da7219.h"
  #include "../../codecs/da7219-aad.h"
  
  #define BXT_DIALOG_CODEC_DAI	"da7219-hifi"
  #define BXT_MAXIM_CODEC_DAI	"HiFi"
  #define DUAL_CHANNEL		2
  #define QUAD_CHANNEL		4
  
  static struct snd_soc_jack broxton_headset;
  static struct snd_soc_jack broxton_hdmi[3];
  
  struct bxt_hdmi_pcm {
  	struct list_head head;
  	struct snd_soc_dai *codec_dai;
  	int device;
  };
  
  struct bxt_card_private {
  	struct list_head hdmi_pcm_list;
  };
  
  enum {
  	BXT_DPCM_AUDIO_PB = 0,
  	BXT_DPCM_AUDIO_CP,
  	BXT_DPCM_AUDIO_REF_CP,
  	BXT_DPCM_AUDIO_DMIC_CP,
  	BXT_DPCM_AUDIO_HDMI1_PB,
  	BXT_DPCM_AUDIO_HDMI2_PB,
  	BXT_DPCM_AUDIO_HDMI3_PB,
  };
  
  static int platform_clock_control(struct snd_soc_dapm_widget *w,
  	struct snd_kcontrol *k, int  event)
  {
  	int ret = 0;
  	struct snd_soc_dapm_context *dapm = w->dapm;
  	struct snd_soc_card *card = dapm->card;
  	struct snd_soc_dai *codec_dai;
  
  	codec_dai = snd_soc_card_get_codec_dai(card, BXT_DIALOG_CODEC_DAI);
  	if (!codec_dai) {
  		dev_err(card->dev, "Codec dai not found; Unable to set/unset codec pll\n");
  		return -EIO;
  	}
  
  	if (SND_SOC_DAPM_EVENT_OFF(event)) {
  		ret = snd_soc_dai_set_pll(codec_dai, 0,
  			DA7219_SYSCLK_MCLK, 0, 0);
  		if (ret)
  			dev_err(card->dev, "failed to stop PLL: %d\n", ret);
  	} else if(SND_SOC_DAPM_EVENT_ON(event)) {
  		ret = snd_soc_dai_set_pll(codec_dai, 0,
  			DA7219_SYSCLK_PLL_SRM, 0, DA7219_PLL_FREQ_OUT_98304);
  		if (ret)
  			dev_err(card->dev, "failed to start PLL: %d\n", ret);
  	}
  
  	return ret;
  }
  
  static const struct snd_kcontrol_new broxton_controls[] = {
  	SOC_DAPM_PIN_SWITCH("Headphone Jack"),
  	SOC_DAPM_PIN_SWITCH("Headset Mic"),
  	SOC_DAPM_PIN_SWITCH("Spk"),
  };
  
  static const struct snd_soc_dapm_widget broxton_widgets[] = {
  	SND_SOC_DAPM_HP("Headphone Jack", NULL),
  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  	SND_SOC_DAPM_SPK("Spk", NULL),
  	SND_SOC_DAPM_MIC("SoC DMIC", NULL),
  	SND_SOC_DAPM_SPK("HDMI1", NULL),
  	SND_SOC_DAPM_SPK("HDMI2", NULL),
  	SND_SOC_DAPM_SPK("HDMI3", NULL),
  	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
  			platform_clock_control,	SND_SOC_DAPM_POST_PMD|SND_SOC_DAPM_PRE_PMU),
  };
  
  static const struct snd_soc_dapm_route broxton_map[] = {
  	/* HP jack connectors - unknown if we have jack detection */
  	{"Headphone Jack", NULL, "HPL"},
  	{"Headphone Jack", NULL, "HPR"},
  
  	/* speaker */
  	{"Spk", NULL, "Speaker"},
  
  	/* other jacks */
  	{"MIC", NULL, "Headset Mic"},
  
  	/* digital mics */
  	{"DMic", NULL, "SoC DMIC"},
  
  	/* CODEC BE connections */
  	{"HiFi Playback", NULL, "ssp5 Tx"},
  	{"ssp5 Tx", NULL, "codec0_out"},
  
  	{"Playback", NULL, "ssp1 Tx"},
  	{"ssp1 Tx", NULL, "codec1_out"},
  
  	{"codec0_in", NULL, "ssp1 Rx"},
  	{"ssp1 Rx", NULL, "Capture"},
  
  	{"HDMI1", NULL, "hif5-0 Output"},
  	{"HDMI2", NULL, "hif6-0 Output"},
  	{"HDMI2", NULL, "hif7-0 Output"},
  
  	{"hifi3", NULL, "iDisp3 Tx"},
  	{"iDisp3 Tx", NULL, "iDisp3_out"},
  	{"hifi2", NULL, "iDisp2 Tx"},
  	{"iDisp2 Tx", NULL, "iDisp2_out"},
  	{"hifi1", NULL, "iDisp1 Tx"},
  	{"iDisp1 Tx", NULL, "iDisp1_out"},
  
  	/* DMIC */
  	{"dmic01_hifi", NULL, "DMIC01 Rx"},
  	{"DMIC01 Rx", NULL, "DMIC AIF"},
  
  	{ "Headphone Jack", NULL, "Platform Clock" },
  	{ "Headset Mic", NULL, "Platform Clock" },
  };
  
  static int broxton_ssp_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);
  	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
  
  	/* The ADSP will convert the FE rate to 48k, stereo */
  	rate->min = rate->max = 48000;
  	channels->min = channels->max = DUAL_CHANNEL;
  
  	/* set SSP to 24 bit */
  	snd_mask_none(fmt);
  	snd_mask_set(fmt, SNDRV_PCM_FORMAT_S24_LE);
  
  	return 0;
  }
  
  static int broxton_da7219_codec_init(struct snd_soc_pcm_runtime *rtd)
  {
  	int ret;
  	struct snd_soc_dai *codec_dai = rtd->codec_dai;
  	struct snd_soc_component *component = rtd->codec_dai->component;
  
  	/* Configure sysclk for codec */
  	ret = snd_soc_dai_set_sysclk(codec_dai, DA7219_CLKSRC_MCLK, 19200000,
  				     SND_SOC_CLOCK_IN);
  	if (ret) {
  		dev_err(rtd->dev, "can't set codec sysclk configuration\n");
  		return ret;
  	}
  
  	/*
  	 * Headset buttons map to the google Reference headset.
  	 * These can be configured by userspace.
  	 */
  	ret = snd_soc_card_jack_new(rtd->card, "Headset Jack",
  			SND_JACK_HEADSET | SND_JACK_BTN_0 | SND_JACK_BTN_1 |
  			SND_JACK_BTN_2 | SND_JACK_BTN_3 | SND_JACK_LINEOUT,
  			&broxton_headset, NULL, 0);
  	if (ret) {
  		dev_err(rtd->dev, "Headset Jack creation failed: %d\n", ret);
  		return ret;
  	}
  
  	da7219_aad_jack_det(component, &broxton_headset);
  
  	snd_soc_dapm_ignore_suspend(&rtd->card->dapm, "SoC DMIC");
  
  	return ret;
  }
  
  static int broxton_hdmi_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct bxt_card_private *ctx = snd_soc_card_get_drvdata(rtd->card);
  	struct snd_soc_dai *dai = rtd->codec_dai;
  	struct bxt_hdmi_pcm *pcm;
  
  	pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL);
  	if (!pcm)
  		return -ENOMEM;
  
  	pcm->device = BXT_DPCM_AUDIO_HDMI1_PB + dai->id;
  	pcm->codec_dai = dai;
  
  	list_add_tail(&pcm->head, &ctx->hdmi_pcm_list);
  
  	return 0;
  }
  
  static int broxton_da7219_fe_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct snd_soc_dapm_context *dapm;
  	struct snd_soc_component *component = rtd->cpu_dai->component;
  
  	dapm = snd_soc_component_get_dapm(component);
  	snd_soc_dapm_ignore_suspend(dapm, "Reference Capture");
  
  	return 0;
  }
  
  static const unsigned int rates[] = {
  	48000,
  };
  
  static const struct snd_pcm_hw_constraint_list constraints_rates = {
  	.count = ARRAY_SIZE(rates),
  	.list  = rates,
  	.mask = 0,
  };
  
  static const unsigned int channels[] = {
  	DUAL_CHANNEL,
  };
  
  static const struct snd_pcm_hw_constraint_list constraints_channels = {
  	.count = ARRAY_SIZE(channels),
  	.list = channels,
  	.mask = 0,
  };
  
  static const unsigned int channels_quad[] = {
  	QUAD_CHANNEL,
  };
  
  static const struct snd_pcm_hw_constraint_list constraints_channels_quad = {
  	.count = ARRAY_SIZE(channels_quad),
  	.list = channels_quad,
  	.mask = 0,
  };
  
  static int bxt_fe_startup(struct snd_pcm_substream *substream)
  {
  	struct snd_pcm_runtime *runtime = substream->runtime;
  
  	/*
  	 * On this platform for PCM device we support,
  	 * 48Khz
  	 * stereo
  	 * 16 bit audio
  	 */
  
  	runtime->hw.channels_max = DUAL_CHANNEL;
  	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
  					   &constraints_channels);
  
  	runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
  	snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
  
  	snd_pcm_hw_constraint_list(runtime, 0,
  				SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
  
  	return 0;
  }
  
  static const struct snd_soc_ops broxton_da7219_fe_ops = {
  	.startup = bxt_fe_startup,
  };
  
  static int broxton_dmic_fixup(struct snd_soc_pcm_runtime *rtd,
  			struct snd_pcm_hw_params *params)
  {
  	struct snd_interval *channels = hw_param_interval(params,
  						SNDRV_PCM_HW_PARAM_CHANNELS);
  	if (params_channels(params) == 2)
  		channels->min = channels->max = 2;
  	else
  		channels->min = channels->max = 4;
  
  	return 0;
  }
  
  static int broxton_dmic_startup(struct snd_pcm_substream *substream)
  {
  	struct snd_pcm_runtime *runtime = substream->runtime;
  
  	runtime->hw.channels_min = runtime->hw.channels_max = QUAD_CHANNEL;
  	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
  			&constraints_channels_quad);
  
  	return snd_pcm_hw_constraint_list(substream->runtime, 0,
  			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
  }
  
  static const struct snd_soc_ops broxton_dmic_ops = {
  	.startup = broxton_dmic_startup,
  };
  
  static const unsigned int rates_16000[] = {
  	16000,
  };
  
  static const struct snd_pcm_hw_constraint_list constraints_16000 = {
  	.count = ARRAY_SIZE(rates_16000),
  	.list  = rates_16000,
  };
  
  static int broxton_refcap_startup(struct snd_pcm_substream *substream)
  {
  	return snd_pcm_hw_constraint_list(substream->runtime, 0,
  			SNDRV_PCM_HW_PARAM_RATE,
  			&constraints_16000);
  };
  
  static const struct snd_soc_ops broxton_refcap_ops = {
  	.startup = broxton_refcap_startup,
  };
  
  /* broxton digital audio interface glue - connects codec <--> CPU */
  static struct snd_soc_dai_link broxton_dais[] = {
  	/* Front End DAI links */
  	[BXT_DPCM_AUDIO_PB] =
  	{
  		.name = "Bxt Audio Port",
  		.stream_name = "Audio",
  		.cpu_dai_name = "System Pin",
  		.platform_name = "0000:00:0e.0",
  		.dynamic = 1,
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.nonatomic = 1,
  		.init = broxton_da7219_fe_init,
  		.trigger = {
  			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
  		.dpcm_playback = 1,
  		.ops = &broxton_da7219_fe_ops,
  	},
  	[BXT_DPCM_AUDIO_CP] =
  	{
  		.name = "Bxt Audio Capture Port",
  		.stream_name = "Audio Record",
  		.cpu_dai_name = "System Pin",
  		.platform_name = "0000:00:0e.0",
  		.dynamic = 1,
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.nonatomic = 1,
  		.trigger = {
  			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
  		.dpcm_capture = 1,
  		.ops = &broxton_da7219_fe_ops,
  	},
  	[BXT_DPCM_AUDIO_REF_CP] =
  	{
  		.name = "Bxt Audio Reference cap",
  		.stream_name = "Refcap",
  		.cpu_dai_name = "Reference Pin",
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.platform_name = "0000:00:0e.0",
  		.init = NULL,
  		.dpcm_capture = 1,
  		.nonatomic = 1,
  		.dynamic = 1,
  		.ops = &broxton_refcap_ops,
  	},
  	[BXT_DPCM_AUDIO_DMIC_CP] =
  	{
  		.name = "Bxt Audio DMIC cap",
  		.stream_name = "dmiccap",
  		.cpu_dai_name = "DMIC Pin",
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.platform_name = "0000:00:0e.0",
  		.init = NULL,
  		.dpcm_capture = 1,
  		.nonatomic = 1,
  		.dynamic = 1,
  		.ops = &broxton_dmic_ops,
  	},
  	[BXT_DPCM_AUDIO_HDMI1_PB] =
  	{
  		.name = "Bxt HDMI Port1",
  		.stream_name = "Hdmi1",
  		.cpu_dai_name = "HDMI1 Pin",
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.platform_name = "0000:00:0e.0",
  		.dpcm_playback = 1,
  		.init = NULL,
  		.nonatomic = 1,
  		.dynamic = 1,
  	},
  	[BXT_DPCM_AUDIO_HDMI2_PB] =
  	{
  		.name = "Bxt HDMI Port2",
  		.stream_name = "Hdmi2",
  		.cpu_dai_name = "HDMI2 Pin",
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.platform_name = "0000:00:0e.0",
  		.dpcm_playback = 1,
  		.init = NULL,
  		.nonatomic = 1,
  		.dynamic = 1,
  	},
  	[BXT_DPCM_AUDIO_HDMI3_PB] =
  	{
  		.name = "Bxt HDMI Port3",
  		.stream_name = "Hdmi3",
  		.cpu_dai_name = "HDMI3 Pin",
  		.codec_name = "snd-soc-dummy",
  		.codec_dai_name = "snd-soc-dummy-dai",
  		.platform_name = "0000:00:0e.0",
  		.dpcm_playback = 1,
  		.init = NULL,
  		.nonatomic = 1,
  		.dynamic = 1,
  	},
  	/* Back End DAI links */
  	{
  		/* SSP5 - Codec */
  		.name = "SSP5-Codec",
  		.id = 0,
  		.cpu_dai_name = "SSP5 Pin",
  		.platform_name = "0000:00:0e.0",
  		.no_pcm = 1,
  		.codec_name = "MX98357A:00",
  		.codec_dai_name = BXT_MAXIM_CODEC_DAI,
  		.dai_fmt = SND_SOC_DAIFMT_I2S |
  			SND_SOC_DAIFMT_NB_NF |
  			SND_SOC_DAIFMT_CBS_CFS,
  		.ignore_pmdown_time = 1,
  		.be_hw_params_fixup = broxton_ssp_fixup,
  		.dpcm_playback = 1,
  	},
  	{
  		/* SSP1 - Codec */
  		.name = "SSP1-Codec",
  		.id = 1,
  		.cpu_dai_name = "SSP1 Pin",
  		.platform_name = "0000:00:0e.0",
  		.no_pcm = 1,
  		.codec_name = "i2c-DLGS7219:00",
  		.codec_dai_name = BXT_DIALOG_CODEC_DAI,
  		.init = broxton_da7219_codec_init,
  		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
  			SND_SOC_DAIFMT_CBS_CFS,
  		.ignore_pmdown_time = 1,
  		.be_hw_params_fixup = broxton_ssp_fixup,
  		.dpcm_playback = 1,
  		.dpcm_capture = 1,
  	},
  	{
  		.name = "dmic01",
  		.id = 2,
  		.cpu_dai_name = "DMIC01 Pin",
  		.codec_name = "dmic-codec",
  		.codec_dai_name = "dmic-hifi",
  		.platform_name = "0000:00:0e.0",
  		.ignore_suspend = 1,
  		.be_hw_params_fixup = broxton_dmic_fixup,
  		.dpcm_capture = 1,
  		.no_pcm = 1,
  	},
  	{
  		.name = "iDisp1",
  		.id = 3,
  		.cpu_dai_name = "iDisp1 Pin",
  		.codec_name = "ehdaudio0D2",
  		.codec_dai_name = "intel-hdmi-hifi1",
  		.platform_name = "0000:00:0e.0",
  		.init = broxton_hdmi_init,
  		.dpcm_playback = 1,
  		.no_pcm = 1,
  	},
  	{
  		.name = "iDisp2",
  		.id = 4,
  		.cpu_dai_name = "iDisp2 Pin",
  		.codec_name = "ehdaudio0D2",
  		.codec_dai_name = "intel-hdmi-hifi2",
  		.platform_name = "0000:00:0e.0",
  		.init = broxton_hdmi_init,
  		.dpcm_playback = 1,
  		.no_pcm = 1,
  	},
  	{
  		.name = "iDisp3",
  		.id = 5,
  		.cpu_dai_name = "iDisp3 Pin",
  		.codec_name = "ehdaudio0D2",
  		.codec_dai_name = "intel-hdmi-hifi3",
  		.platform_name = "0000:00:0e.0",
  		.init = broxton_hdmi_init,
  		.dpcm_playback = 1,
  		.no_pcm = 1,
  	},
  };
  
  #define NAME_SIZE	32
  static int bxt_card_late_probe(struct snd_soc_card *card)
  {
  	struct bxt_card_private *ctx = snd_soc_card_get_drvdata(card);
  	struct bxt_hdmi_pcm *pcm;
  	struct snd_soc_component *component = NULL;
  	int err, i = 0;
  	char jack_name[NAME_SIZE];
  
  	list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) {
  		component = pcm->codec_dai->component;
  		snprintf(jack_name, sizeof(jack_name),
  			"HDMI/DP, pcm=%d Jack", pcm->device);
  		err = snd_soc_card_jack_new(card, jack_name,
  					SND_JACK_AVOUT, &broxton_hdmi[i],
  					NULL, 0);
  
  		if (err)
  			return err;
  
  		err = hdac_hdmi_jack_init(pcm->codec_dai, pcm->device,
  						&broxton_hdmi[i]);
  		if (err < 0)
  			return err;
  
  		i++;
  	}
  
  	if (!component)
  		return -EINVAL;
  
  	return hdac_hdmi_jack_port_init(component, &card->dapm);
  }
  
  /* broxton audio machine driver for SPT + da7219 */
  static struct snd_soc_card broxton_audio_card = {
  	.name = "bxtda7219max",
  	.owner = THIS_MODULE,
  	.dai_link = broxton_dais,
  	.num_links = ARRAY_SIZE(broxton_dais),
  	.controls = broxton_controls,
  	.num_controls = ARRAY_SIZE(broxton_controls),
  	.dapm_widgets = broxton_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(broxton_widgets),
  	.dapm_routes = broxton_map,
  	.num_dapm_routes = ARRAY_SIZE(broxton_map),
  	.fully_routed = true,
  	.late_probe = bxt_card_late_probe,
  };
  
  static int broxton_audio_probe(struct platform_device *pdev)
  {
  	struct bxt_card_private *ctx;
  
  	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_ATOMIC);
  	if (!ctx)
  		return -ENOMEM;
  
  	INIT_LIST_HEAD(&ctx->hdmi_pcm_list);
  
  	broxton_audio_card.dev = &pdev->dev;
  	snd_soc_card_set_drvdata(&broxton_audio_card, ctx);
  
  	return devm_snd_soc_register_card(&pdev->dev, &broxton_audio_card);
  }
  
  static struct platform_driver broxton_audio = {
  	.probe = broxton_audio_probe,
  	.driver = {
  		.name = "bxt_da7219_max98357a_i2s",
  		.pm = &snd_soc_pm_ops,
  	},
  };
  module_platform_driver(broxton_audio)
  
  /* Module information */
  MODULE_DESCRIPTION("Audio Machine driver-DA7219 & MAX98357A in I2S mode");
  MODULE_AUTHOR("Sathyanarayana Nujella <sathyanarayana.nujella@intel.com>");
  MODULE_AUTHOR("Rohit Ainapure <rohit.m.ainapure@intel.com>");
  MODULE_AUTHOR("Harsha Priya <harshapriya.n@intel.com>");
  MODULE_AUTHOR("Conrad Cooke <conrad.cooke@intel.com>");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:bxt_da7219_max98357a_i2s");
  