text: /*
   * Speyside audio support
   *
   * Copyright 2011 Wolfson Microelectronics
   *
   * 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;  either version 2 of the  License, or (at your
   * option) any later version.
   */
  
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>
  #include <sound/jack.h>
  #include <linux/gpio.h>
  #include <linux/module.h>
  
  #include "../codecs/wm8996.h"
  #include "../codecs/wm9081.h"
  
  #define WM8996_HPSEL_GPIO 214
  #define MCLK_AUDIO_RATE (512 * 48000)
  
  static int speyside_set_bias_level(struct snd_soc_card *card,
  				   struct snd_soc_dapm_context *dapm,
  				   enum snd_soc_bias_level level)
  {
  	struct snd_soc_dai *codec_dai = card->rtd[1].codec_dai;
  	int ret;
  
  	if (dapm->dev != codec_dai->dev)
  		return 0;
  
  	switch (level) {
  	case SND_SOC_BIAS_STANDBY:
  		ret = snd_soc_dai_set_sysclk(codec_dai, WM8996_SYSCLK_MCLK2,
  					     32768, SND_SOC_CLOCK_IN);
  		if (ret < 0)
  			return ret;
  
  		ret = snd_soc_dai_set_pll(codec_dai, WM8996_FLL_MCLK2,
  					  0, 0, 0);
  		if (ret < 0) {
  			pr_err("Failed to stop FLL\n");
  			return ret;
  		}
  		break;
  
  	default:
  		break;
  	}
  
  	return 0;
  }
  
  static int speyside_set_bias_level_post(struct snd_soc_card *card,
  					struct snd_soc_dapm_context *dapm,
  					enum snd_soc_bias_level level)
  {
  	struct snd_soc_dai *codec_dai = card->rtd[1].codec_dai;
  	int ret;
  
  	if (dapm->dev != codec_dai->dev)
  		return 0;
  
  	switch (level) {
  	case SND_SOC_BIAS_PREPARE:
  		if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY) {
  			ret = snd_soc_dai_set_pll(codec_dai, 0,
  						  WM8996_FLL_MCLK2,
  						  32768, MCLK_AUDIO_RATE);
  			if (ret < 0) {
  				pr_err("Failed to start FLL\n");
  				return ret;
  			}
  
  			ret = snd_soc_dai_set_sysclk(codec_dai,
  						     WM8996_SYSCLK_FLL,
  						     MCLK_AUDIO_RATE,
  						     SND_SOC_CLOCK_IN);
  			if (ret < 0)
  				return ret;
  		}
  		break;
  
  	default:
  		break;
  	}
  
  	card->dapm.bias_level = level;
  
  	return 0;
  }
  
  static struct snd_soc_jack speyside_headset;
  
  /* Headset jack detection DAPM pins */
  static struct snd_soc_jack_pin speyside_headset_pins[] = {
  	{
  		.pin = "Headset Mic",
  		.mask = SND_JACK_MICROPHONE,
  	},
  };
  
  /* Default the headphone selection to active high */
  static int speyside_jack_polarity;
  
  static int speyside_get_micbias(struct snd_soc_dapm_widget *source,
  				struct snd_soc_dapm_widget *sink)
  {
  	if (speyside_jack_polarity && (strcmp(source->name, "MICB1") == 0))
  		return 1;
  	if (!speyside_jack_polarity && (strcmp(source->name, "MICB2") == 0))
  		return 1;
  
  	return 0;
  }
  
  static void speyside_set_polarity(struct snd_soc_codec *codec,
  				  int polarity)
  {
  	speyside_jack_polarity = !polarity;
  	gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity);
  
  	/* Re-run DAPM to make sure we're using the correct mic bias */
  	snd_soc_dapm_sync(snd_soc_codec_get_dapm(codec));
  }
  
  static int speyside_wm0010_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct snd_soc_dai *dai = rtd->codec_dai;
  	int ret;
  
  	ret = snd_soc_dai_set_sysclk(dai, 0, MCLK_AUDIO_RATE, 0);
  	if (ret < 0)
  		return ret;
  
  	return 0;
  }
  
  static int speyside_wm8996_init(struct snd_soc_pcm_runtime *rtd)
  {
  	struct snd_soc_dai *dai = rtd->codec_dai;
  	struct snd_soc_codec *codec = rtd->codec;
  	int ret;
  
  	ret = snd_soc_dai_set_sysclk(dai, WM8996_SYSCLK_MCLK2, 32768, 0);
  	if (ret < 0)
  		return ret;
  
  	ret = gpio_request(WM8996_HPSEL_GPIO, "HP_SEL");
  	if (ret != 0)
  		pr_err("Failed to request HP_SEL GPIO: %d\n", ret);
  	gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity);
  
  	ret = snd_soc_card_jack_new(rtd->card, "Headset", SND_JACK_LINEOUT |
  				    SND_JACK_HEADSET | SND_JACK_BTN_0,
  				    &speyside_headset, speyside_headset_pins,
  				    ARRAY_SIZE(speyside_headset_pins));
  	if (ret)
  		return ret;
  
  	wm8996_detect(codec, &speyside_headset, speyside_set_polarity);
  
  	return 0;
  }
  
  static int speyside_late_probe(struct snd_soc_card *card)
  {
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Headphone");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Headset Mic");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Main AMIC");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Main DMIC");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "Main Speaker");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "WM1250 Output");
  	snd_soc_dapm_ignore_suspend(&card->dapm, "WM1250 Input");
  
  	return 0;
  }
  
  static const struct snd_soc_pcm_stream dsp_codec_params = {
  	.formats = SNDRV_PCM_FMTBIT_S32_LE,
  	.rate_min = 48000,
  	.rate_max = 48000,
  	.channels_min = 2,
  	.channels_max = 2,
  };
  
  static struct snd_soc_dai_link speyside_dai[] = {
  	{
  		.name = "CPU-DSP",
  		.stream_name = "CPU-DSP",
  		.cpu_dai_name = "samsung-i2s.0",
  		.codec_dai_name = "wm0010-sdi1",
  		.platform_name = "samsung-i2s.0",
  		.codec_name = "spi0.0",
  		.init = speyside_wm0010_init,
  		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
  				| SND_SOC_DAIFMT_CBM_CFM,
  	},
  	{
  		.name = "DSP-CODEC",
  		.stream_name = "DSP-CODEC",
  		.cpu_dai_name = "wm0010-sdi2",
  		.codec_dai_name = "wm8996-aif1",
  		.codec_name = "wm8996.1-001a",
  		.init = speyside_wm8996_init,
  		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
  				| SND_SOC_DAIFMT_CBM_CFM,
  		.params = &dsp_codec_params,
  		.ignore_suspend = 1,
  	},
  	{
  		.name = "Baseband",
  		.stream_name = "Baseband",
  		.cpu_dai_name = "wm8996-aif2",
  		.codec_dai_name = "wm1250-ev1",
  		.codec_name = "wm1250-ev1.1-0027",
  		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
  				| SND_SOC_DAIFMT_CBM_CFM,
  		.ignore_suspend = 1,
  	},
  };
  
  static int speyside_wm9081_init(struct snd_soc_component *component)
  {
  	struct snd_soc_codec *codec = snd_soc_component_to_codec(component);
  
  	/* At any time the WM9081 is active it will have this clock */
  	return snd_soc_codec_set_sysclk(codec, WM9081_SYSCLK_MCLK, 0,
  					MCLK_AUDIO_RATE, 0);
  }
  
  static struct snd_soc_aux_dev speyside_aux_dev[] = {
  	{
  		.name = "wm9081",
  		.codec_name = "wm9081.1-006c",
  		.init = speyside_wm9081_init,
  	},
  };
  
  static struct snd_soc_codec_conf speyside_codec_conf[] = {
  	{
  		.dev_name = "wm9081.1-006c",
  		.name_prefix = "Sub",
  	},
  };
  
  static const struct snd_kcontrol_new controls[] = {
  	SOC_DAPM_PIN_SWITCH("Main Speaker"),
  	SOC_DAPM_PIN_SWITCH("Main DMIC"),
  	SOC_DAPM_PIN_SWITCH("Main AMIC"),
  	SOC_DAPM_PIN_SWITCH("WM1250 Input"),
  	SOC_DAPM_PIN_SWITCH("WM1250 Output"),
  	SOC_DAPM_PIN_SWITCH("Headphone"),
  };
  
  static struct snd_soc_dapm_widget widgets[] = {
  	SND_SOC_DAPM_HP("Headphone", NULL),
  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  
  	SND_SOC_DAPM_SPK("Main Speaker", NULL),
  
  	SND_SOC_DAPM_MIC("Main AMIC", NULL),
  	SND_SOC_DAPM_MIC("Main DMIC", NULL),
  };
  
  static struct snd_soc_dapm_route audio_paths[] = {
  	{ "IN1RN", NULL, "MICB1" },
  	{ "IN1RP", NULL, "MICB1" },
  	{ "IN1RN", NULL, "MICB2" },
  	{ "IN1RP", NULL, "MICB2" },
  	{ "MICB1", NULL, "Headset Mic", speyside_get_micbias },
  	{ "MICB2", NULL, "Headset Mic", speyside_get_micbias },
  
  	{ "IN1LP", NULL, "MICB2" },
  	{ "IN1RN", NULL, "MICB1" },
  	{ "MICB2", NULL, "Main AMIC" },
  
  	{ "DMIC1DAT", NULL, "MICB1" },
  	{ "DMIC2DAT", NULL, "MICB1" },
  	{ "MICB1", NULL, "Main DMIC" },
  
  	{ "Headphone", NULL, "HPOUT1L" },
  	{ "Headphone", NULL, "HPOUT1R" },
  
  	{ "Sub IN1", NULL, "HPOUT2L" },
  	{ "Sub IN2", NULL, "HPOUT2R" },
  
  	{ "Main Speaker", NULL, "Sub SPKN" },
  	{ "Main Speaker", NULL, "Sub SPKP" },
  	{ "Main Speaker", NULL, "SPKDAT" },
  };
  
  static struct snd_soc_card speyside = {
  	.name = "Speyside",
  	.owner = THIS_MODULE,
  	.dai_link = speyside_dai,
  	.num_links = ARRAY_SIZE(speyside_dai),
  	.aux_dev = speyside_aux_dev,
  	.num_aux_devs = ARRAY_SIZE(speyside_aux_dev),
  	.codec_conf = speyside_codec_conf,
  	.num_configs = ARRAY_SIZE(speyside_codec_conf),
  
  	.set_bias_level = speyside_set_bias_level,
  	.set_bias_level_post = speyside_set_bias_level_post,
  
  	.controls = controls,
  	.num_controls = ARRAY_SIZE(controls),
  	.dapm_widgets = widgets,
  	.num_dapm_widgets = ARRAY_SIZE(widgets),
  	.dapm_routes = audio_paths,
  	.num_dapm_routes = ARRAY_SIZE(audio_paths),
  	.fully_routed = true,
  
  	.late_probe = speyside_late_probe,
  };
  
  static int speyside_probe(struct platform_device *pdev)
  {
  	struct snd_soc_card *card = &speyside;
  	int ret;
  
  	card->dev = &pdev->dev;
  
  	ret = devm_snd_soc_register_card(&pdev->dev, card);
  	if (ret)
  		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
  			ret);
  
  	return ret;
  }
  
  static struct platform_driver speyside_driver = {
  	.driver = {
  		.name = "speyside",
  		.pm = &snd_soc_pm_ops,
  	},
  	.probe = speyside_probe,
  };
  
  module_platform_driver(speyside_driver);
  
  MODULE_DESCRIPTION("Speyside audio support");
  MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:speyside");
  