text: /*
   * Handles the Mitac mioa701 SoC system
   *
   * Copyright (C) 2008 Robert Jarzmik
   *
   * 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 in 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.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   * This is a little schema of the sound interconnections :
   *
   *    Sagem X200                 Wolfson WM9713
   *    +--------+             +-------------------+      Rear Speaker
   *    |        |             |                   |           /-+
   *    |        +--->----->---+MONOIN         SPKL+--->----+-+  |
   *    |  GSM   |             |                   |        | |  |
   *    |        +--->----->---+PCBEEP         SPKR+--->----+-+  |
   *    |  CHIP  |             |                   |           \-+
   *    |        +---<-----<---+MONO               |
   *    |        |             |                   |      Front Speaker
   *    +--------+             |                   |           /-+
   *                           |                HPL+--->----+-+  |
   *                           |                   |        | |  |
   *                           |               OUT3+--->----+-+  |
   *                           |                   |           \-+
   *                           |                   |
   *                           |                   |     Front Micro
   *                           |                   |         +
   *                           |               MIC1+-----<--+o+
   *                           |                   |         +
   *                           +-------------------+        ---
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/platform_device.h>
  
  #include <asm/mach-types.h>
  #include <mach/audio.h>
  
  #include <sound/core.h>
  #include <sound/pcm.h>
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>
  #include <sound/initval.h>
  #include <sound/ac97_codec.h>
  
  #include "pxa2xx-pcm.h"
  #include "pxa2xx-ac97.h"
  #include "../codecs/wm9713.h"
  
  #define ARRAY_AND_SIZE(x)	(x), ARRAY_SIZE(x)
  
  #define AC97_GPIO_PULL		0x58
  
  /* Use GPIO8 for rear speaker amplifier */
  static int rear_amp_power(struct snd_soc_codec *codec, int power)
  {
  	unsigned short reg;
  
  	if (power) {
  		reg = snd_soc_read(codec, AC97_GPIO_CFG);
  		snd_soc_write(codec, AC97_GPIO_CFG, reg | 0x0100);
  		reg = snd_soc_read(codec, AC97_GPIO_PULL);
  		snd_soc_write(codec, AC97_GPIO_PULL, reg | (1<<15));
  	} else {
  		reg = snd_soc_read(codec, AC97_GPIO_CFG);
  		snd_soc_write(codec, AC97_GPIO_CFG, reg & ~0x0100);
  		reg = snd_soc_read(codec, AC97_GPIO_PULL);
  		snd_soc_write(codec, AC97_GPIO_PULL, reg & ~(1<<15));
  	}
  
  	return 0;
  }
  
  static int rear_amp_event(struct snd_soc_dapm_widget *widget,
  			  struct snd_kcontrol *kctl, int event)
  {
  	struct snd_soc_codec *codec = widget->codec;
  
  	return rear_amp_power(codec, SND_SOC_DAPM_EVENT_ON(event));
  }
  
  /* mioa701 machine dapm widgets */
  static const struct snd_soc_dapm_widget mioa701_dapm_widgets[] = {
  	SND_SOC_DAPM_SPK("Front Speaker", NULL),
  	SND_SOC_DAPM_SPK("Rear Speaker", rear_amp_event),
  	SND_SOC_DAPM_MIC("Headset", NULL),
  	SND_SOC_DAPM_LINE("GSM Line Out", NULL),
  	SND_SOC_DAPM_LINE("GSM Line In", NULL),
  	SND_SOC_DAPM_MIC("Headset Mic", NULL),
  	SND_SOC_DAPM_MIC("Front Mic", NULL),
  };
  
  static const struct snd_soc_dapm_route audio_map[] = {
  	/* Call Mic */
  	{"Mic Bias", NULL, "Front Mic"},
  	{"MIC1", NULL, "Mic Bias"},
  
  	/* Headset Mic */
  	{"LINEL", NULL, "Headset Mic"},
  	{"LINER", NULL, "Headset Mic"},
  
  	/* GSM Module */
  	{"MONOIN", NULL, "GSM Line Out"},
  	{"PCBEEP", NULL, "GSM Line Out"},
  	{"GSM Line In", NULL, "MONO"},
  
  	/* headphone connected to HPL, HPR */
  	{"Headset", NULL, "HPL"},
  	{"Headset", NULL, "HPR"},
  
  	/* front speaker connected to HPL, OUT3 */
  	{"Front Speaker", NULL, "HPL"},
  	{"Front Speaker", NULL, "OUT3"},
  
  	/* rear speaker connected to SPKL, SPKR */
  	{"Rear Speaker", NULL, "SPKL"},
  	{"Rear Speaker", NULL, "SPKR"},
  };
  
  static int mioa701_wm9713_init(struct snd_soc_codec *codec)
  {
  	unsigned short reg;
  
  	/* Add mioa701 specific widgets */
  	snd_soc_dapm_new_controls(codec, ARRAY_AND_SIZE(mioa701_dapm_widgets));
  
  	/* Set up mioa701 specific audio path audio_mapnects */
  	snd_soc_dapm_add_routes(codec, ARRAY_AND_SIZE(audio_map));
  
  	/* Prepare GPIO8 for rear speaker amplifier */
  	reg = codec->read(codec, AC97_GPIO_CFG);
  	codec->write(codec, AC97_GPIO_CFG, reg | 0x0100);
  
  	/* Prepare MIC input */
  	reg = codec->read(codec, AC97_3D_CONTROL);
  	codec->write(codec, AC97_3D_CONTROL, reg | 0xc000);
  
  	snd_soc_dapm_enable_pin(codec, "Front Speaker");
  	snd_soc_dapm_enable_pin(codec, "Rear Speaker");
  	snd_soc_dapm_enable_pin(codec, "Front Mic");
  	snd_soc_dapm_enable_pin(codec, "GSM Line In");
  	snd_soc_dapm_enable_pin(codec, "GSM Line Out");
  	snd_soc_dapm_sync(codec);
  
  	return 0;
  }
  
  static struct snd_soc_ops mioa701_ops;
  
  static struct snd_soc_dai_link mioa701_dai[] = {
  	{
  		.name = "AC97",
  		.stream_name = "AC97 HiFi",
  		.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_HIFI],
  		.codec_dai = &wm9713_dai[WM9713_DAI_AC97_HIFI],
  		.init = mioa701_wm9713_init,
  		.ops = &mioa701_ops,
  	},
  	{
  		.name = "AC97 Aux",
  		.stream_name = "AC97 Aux",
  		.cpu_dai = &pxa_ac97_dai[PXA2XX_DAI_AC97_AUX],
  		.codec_dai = &wm9713_dai[WM9713_DAI_AC97_AUX],
  		.ops = &mioa701_ops,
  	},
  };
  
  static struct snd_soc_card mioa701 = {
  	.name = "MioA701",
  	.platform = &pxa2xx_soc_platform,
  	.dai_link = mioa701_dai,
  	.num_links = ARRAY_SIZE(mioa701_dai),
  };
  
  static struct snd_soc_device mioa701_snd_devdata = {
  	.card = &mioa701,
  	.codec_dev = &soc_codec_dev_wm9713,
  };
  
  static struct platform_device *mioa701_snd_device;
  
  static int mioa701_wm9713_probe(struct platform_device *pdev)
  {
  	int ret;
  
  	if (!machine_is_mioa701())
  		return -ENODEV;
  
  	dev_warn(&pdev->dev, "Be warned that incorrect mixers/muxes setup will"
  		 "lead to overheating and possible destruction of your device."
  		 "Do not use without a good knowledge of mio's board design!\n");
  
  	mioa701_snd_device = platform_device_alloc("soc-audio", -1);
  	if (!mioa701_snd_device)
  		return -ENOMEM;
  
  	platform_set_drvdata(mioa701_snd_device, &mioa701_snd_devdata);
  	mioa701_snd_devdata.dev = &mioa701_snd_device->dev;
  
  	ret = platform_device_add(mioa701_snd_device);
  	if (!ret)
  		return 0;
  
  	platform_device_put(mioa701_snd_device);
  	return ret;
  }
  
  static int __devexit mioa701_wm9713_remove(struct platform_device *pdev)
  {
  	platform_device_unregister(mioa701_snd_device);
  	return 0;
  }
  
  static struct platform_driver mioa701_wm9713_driver = {
  	.probe		= mioa701_wm9713_probe,
  	.remove		= __devexit_p(mioa701_wm9713_remove),
  	.driver		= {
  		.name		= "mioa701-wm9713",
  		.owner		= THIS_MODULE,
  	},
  };
  
  static int __init mioa701_asoc_init(void)
  {
  	return platform_driver_register(&mioa701_wm9713_driver);
  }
  
  static void __exit mioa701_asoc_exit(void)
  {
  	platform_driver_unregister(&mioa701_wm9713_driver);
  }
  
  module_init(mioa701_asoc_init);
  module_exit(mioa701_asoc_exit);
  
  /* Module information */
  MODULE_AUTHOR("Robert Jarzmik (rjarzmik@free.fr)");
  MODULE_DESCRIPTION("ALSA SoC WM9713 MIO A701");
  MODULE_LICENSE("GPL");
  