text: /*
   * e740-wm9705.c  --  SoC audio for e740
   *
   * Copyright 2007 (c) Ian Molton <spyro@f2s.com>
   *
   *  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 ONLY.
   *
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/gpio.h>
  
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/soc.h>
  
  #include <mach/audio.h>
  #include <mach/eseries-gpio.h>
  
  #include <asm/mach-types.h>
  
  #define E740_AUDIO_OUT 1
  #define E740_AUDIO_IN  2
  
  static int e740_audio_power;
  
  static void e740_sync_audio_power(int status)
  {
  	gpio_set_value(GPIO_E740_WM9705_nAVDD2, !status);
  	gpio_set_value(GPIO_E740_AMP_ON, (status & E740_AUDIO_OUT) ? 1 : 0);
  	gpio_set_value(GPIO_E740_MIC_ON, (status & E740_AUDIO_IN) ? 1 : 0);
  }
  
  static int e740_mic_amp_event(struct snd_soc_dapm_widget *w,
  				struct snd_kcontrol *kcontrol, int event)
  {
  	if (event & SND_SOC_DAPM_PRE_PMU)
  		e740_audio_power |= E740_AUDIO_IN;
  	else if (event & SND_SOC_DAPM_POST_PMD)
  		e740_audio_power &= ~E740_AUDIO_IN;
  
  	e740_sync_audio_power(e740_audio_power);
  
  	return 0;
  }
  
  static int e740_output_amp_event(struct snd_soc_dapm_widget *w,
  				struct snd_kcontrol *kcontrol, int event)
  {
  	if (event & SND_SOC_DAPM_PRE_PMU)
  		e740_audio_power |= E740_AUDIO_OUT;
  	else if (event & SND_SOC_DAPM_POST_PMD)
  		e740_audio_power &= ~E740_AUDIO_OUT;
  
  	e740_sync_audio_power(e740_audio_power);
  
  	return 0;
  }
  
  static const struct snd_soc_dapm_widget e740_dapm_widgets[] = {
  	SND_SOC_DAPM_HP("Headphone Jack", NULL),
  	SND_SOC_DAPM_SPK("Speaker", NULL),
  	SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
  	SND_SOC_DAPM_PGA_E("Output Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
  			e740_output_amp_event, SND_SOC_DAPM_PRE_PMU |
  			SND_SOC_DAPM_POST_PMD),
  	SND_SOC_DAPM_PGA_E("Mic Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
  			e740_mic_amp_event, SND_SOC_DAPM_PRE_PMU |
  			SND_SOC_DAPM_POST_PMD),
  };
  
  static const struct snd_soc_dapm_route audio_map[] = {
  	{"Output Amp", NULL, "LOUT"},
  	{"Output Amp", NULL, "ROUT"},
  	{"Output Amp", NULL, "MONOOUT"},
  
  	{"Speaker", NULL, "Output Amp"},
  	{"Headphone Jack", NULL, "Output Amp"},
  
  	{"MIC1", NULL, "Mic Amp"},
  	{"Mic Amp", NULL, "Mic (Internal)"},
  };
  
  static struct snd_soc_dai_link e740_dai[] = {
  	{
  		.name = "AC97",
  		.stream_name = "AC97 HiFi",
  		.cpu_dai_name = "pxa2xx-ac97",
  		.codec_dai_name = "wm9705-hifi",
  		.platform_name = "pxa-pcm-audio",
  		.codec_name = "wm9705-codec",
  	},
  	{
  		.name = "AC97 Aux",
  		.stream_name = "AC97 Aux",
  		.cpu_dai_name = "pxa2xx-ac97-aux",
  		.codec_dai_name = "wm9705-aux",
  		.platform_name = "pxa-pcm-audio",
  		.codec_name = "wm9705-codec",
  	},
  };
  
  static struct snd_soc_card e740 = {
  	.name = "Toshiba e740",
  	.owner = THIS_MODULE,
  	.dai_link = e740_dai,
  	.num_links = ARRAY_SIZE(e740_dai),
  
  	.dapm_widgets = e740_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(e740_dapm_widgets),
  	.dapm_routes = audio_map,
  	.num_dapm_routes = ARRAY_SIZE(audio_map),
  	.fully_routed = true,
  };
  
  static struct gpio e740_audio_gpios[] = {
  	{ GPIO_E740_MIC_ON, GPIOF_OUT_INIT_LOW, "Mic amp" },
  	{ GPIO_E740_AMP_ON, GPIOF_OUT_INIT_LOW, "Output amp" },
  	{ GPIO_E740_WM9705_nAVDD2, GPIOF_OUT_INIT_HIGH, "Audio power" },
  };
  
  static int e740_probe(struct platform_device *pdev)
  {
  	struct snd_soc_card *card = &e740;
  	int ret;
  
  	ret = gpio_request_array(e740_audio_gpios,
  				 ARRAY_SIZE(e740_audio_gpios));
  	if (ret)
  		return 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);
  		gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
  	}
  	return ret;
  }
  
  static int e740_remove(struct platform_device *pdev)
  {
  	gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
  	return 0;
  }
  
  static struct platform_driver e740_driver = {
  	.driver		= {
  		.name	= "e740-audio",
  		.pm     = &snd_soc_pm_ops,
  	},
  	.probe		= e740_probe,
  	.remove		= e740_remove,
  };
  
  module_platform_driver(e740_driver);
  
  /* Module information */
  MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
  MODULE_DESCRIPTION("ALSA SoC driver for e740");
  MODULE_LICENSE("GPL v2");
  MODULE_ALIAS("platform:e740-audio");
  