sound/soc/pxa/spitz.c - kernel/msm-5.4 - Gitiles

 /*
  * spitz.c  --  SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
  *
  * Copyright 2005 Wolfson Microelectronics PLC.
  * Copyright 2005 Openedhand Ltd.
  *
  * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
  *          Richard Purdie <richard@openedhand.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;  either version 2 of the  License, or (at your
  *  option) any later version.
  *
  */

 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>

 #include <asm/mach-types.h>
 #include <mach/spitz.h>
 #include "../codecs/wm8750.h"
 #include "pxa2xx-i2s.h"

 #define SPITZ_HP        0
 #define SPITZ_MIC       1
 #define SPITZ_LINE      2
 #define SPITZ_HEADSET   3
 #define SPITZ_HP_OFF    4
 #define SPITZ_SPK_ON    0
 #define SPITZ_SPK_OFF   1

  /* audio clock in Hz - rounded from 12.235MHz */
 #define SPITZ_AUDIO_CLOCK 12288000

 static int spitz_jack_func;
 static int spitz_spk_func;
 static int spitz_mic_gpio;

 static void spitz_ext_control(struct snd_soc_dapm_context *dapm)
 {
 	snd_soc_dapm_mutex_lock(dapm);

 	if (spitz_spk_func == SPITZ_SPK_ON)
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
 	else
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");

 	/* set up jack connection */
 	switch (spitz_jack_func) {
 	case SPITZ_HP:
 		/* enable and unmute hp jack, disable mic bias */
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
 		gpio_set_value(SPITZ_GPIO_MUTE_L, 1);
 		gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
 		break;
 	case SPITZ_MIC:
 		/* enable mic jack and bias, mute hp */
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 		gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
 		gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
 		break;
 	case SPITZ_LINE:
 		/* enable line jack, disable mic bias and mute hp */
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
 		gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
 		gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
 		break;
 	case SPITZ_HEADSET:
 		/* enable and unmute headset jack enable mic bias, mute L hp */
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 		snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
 		gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
 		gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
 		break;
 	case SPITZ_HP_OFF:

 		/* jack removed, everything off */
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 		gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
 		gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
 		break;
 	}

 	snd_soc_dapm_sync_unlocked(dapm);

 	snd_soc_dapm_mutex_unlock(dapm);
 }

 static int spitz_startup(struct snd_pcm_substream *substream)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;

 	/* check the jack status at stream startup */
 	spitz_ext_control(&rtd->card->dapm);

 	return 0;
 }

 static int spitz_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;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	unsigned int clk = 0;
 	int ret = 0;

 	switch (params_rate(params)) {
 	case 8000:
 	case 16000:
 	case 48000:
 	case 96000:
 		clk = 12288000;
 		break;
 	case 11025:
 	case 22050:
 	case 44100:
 		clk = 11289600;
 		break;
 	}

 	/* set the codec system clock for DAC and ADC */
 	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 		SND_SOC_CLOCK_IN);
 	if (ret < 0)
 		return ret;

 	/* set the I2S system clock as input (unused) */
 	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
 		SND_SOC_CLOCK_IN);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static struct snd_soc_ops spitz_ops = {
 	.startup = spitz_startup,
 	.hw_params = spitz_hw_params,
 };

 static int spitz_get_jack(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	ucontrol->value.integer.value[0] = spitz_jack_func;
 	return 0;
 }

 static int spitz_set_jack(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

 	if (spitz_jack_func == ucontrol->value.integer.value[0])
 		return 0;

 	spitz_jack_func = ucontrol->value.integer.value[0];
 	spitz_ext_control(&card->dapm);
 	return 1;
 }

 static int spitz_get_spk(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	ucontrol->value.integer.value[0] = spitz_spk_func;
 	return 0;
 }

 static int spitz_set_spk(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

 	if (spitz_spk_func == ucontrol->value.integer.value[0])
 		return 0;

 	spitz_spk_func = ucontrol->value.integer.value[0];
 	spitz_ext_control(&card->dapm);
 	return 1;
 }

 static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *k, int event)
 {
 	gpio_set_value_cansleep(spitz_mic_gpio, SND_SOC_DAPM_EVENT_ON(event));
 	return 0;
 }

 /* spitz machine dapm widgets */
 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 	SND_SOC_DAPM_LINE("Line Jack", NULL),

 	/* headset is a mic and mono headphone */
 	SND_SOC_DAPM_HP("Headset Jack", NULL),
 };

 /* Spitz machine audio_map */
 static const struct snd_soc_dapm_route spitz_audio_map[] = {

 	/* headphone connected to LOUT1, ROUT1 */
 	{"Headphone Jack", NULL, "LOUT1"},
 	{"Headphone Jack", NULL, "ROUT1"},

 	/* headset connected to ROUT1 and LINPUT1 with bias (def below) */
 	{"Headset Jack", NULL, "ROUT1"},

 	/* ext speaker connected to LOUT2, ROUT2  */
 	{"Ext Spk", NULL , "ROUT2"},
 	{"Ext Spk", NULL , "LOUT2"},

 	/* mic is connected to input 1 - with bias */
 	{"LINPUT1", NULL, "Mic Bias"},
 	{"Mic Bias", NULL, "Mic Jack"},

 	/* line is connected to input 1 - no bias */
 	{"LINPUT1", NULL, "Line Jack"},
 };

 static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
 	"Off"};
 static const char *spk_function[] = {"On", "Off"};
 static const struct soc_enum spitz_enum[] = {
 	SOC_ENUM_SINGLE_EXT(5, jack_function),
 	SOC_ENUM_SINGLE_EXT(2, spk_function),
 };

 static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
 	SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
 		spitz_set_jack),
 	SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
 		spitz_set_spk),
 };

 /* spitz digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link spitz_dai = {
 	.name = "wm8750",
 	.stream_name = "WM8750",
 	.cpu_dai_name = "pxa2xx-i2s",
 	.codec_dai_name = "wm8750-hifi",
 	.platform_name = "pxa-pcm-audio",
 	.codec_name = "wm8750.0-001b",
 	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 		   SND_SOC_DAIFMT_CBS_CFS,
 	.ops = &spitz_ops,
 };

 /* spitz audio machine driver */
 static struct snd_soc_card snd_soc_spitz = {
 	.name = "Spitz",
 	.owner = THIS_MODULE,
 	.dai_link = &spitz_dai,
 	.num_links = 1,

 	.controls = wm8750_spitz_controls,
 	.num_controls = ARRAY_SIZE(wm8750_spitz_controls),
 	.dapm_widgets = wm8750_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
 	.dapm_routes = spitz_audio_map,
 	.num_dapm_routes = ARRAY_SIZE(spitz_audio_map),
 	.fully_routed = true,
 };

 static int spitz_probe(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = &snd_soc_spitz;
 	int ret;

 	if (machine_is_akita())
 		spitz_mic_gpio = AKITA_GPIO_MIC_BIAS;
 	else
 		spitz_mic_gpio = SPITZ_GPIO_MIC_BIAS;

 	ret = gpio_request(spitz_mic_gpio, "MIC GPIO");
 	if (ret)
 		goto err1;

 	ret = gpio_direction_output(spitz_mic_gpio, 0);
 	if (ret)
 		goto err2;

 	card->dev = &pdev->dev;

 	ret = snd_soc_register_card(card);
 	if (ret) {
 		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
 			ret);
 		goto err2;
 	}

 	return 0;

 err2:
 	gpio_free(spitz_mic_gpio);
 err1:
 	return ret;
 }

 static int spitz_remove(struct platform_device *pdev)
 {
 	struct snd_soc_card *card = platform_get_drvdata(pdev);

 	snd_soc_unregister_card(card);
 	gpio_free(spitz_mic_gpio);
 	return 0;
 }

 static struct platform_driver spitz_driver = {
 	.driver		= {
 		.name	= "spitz-audio",
 		.pm     = &snd_soc_pm_ops,
 	},
 	.probe		= spitz_probe,
 	.remove		= spitz_remove,
 };

 module_platform_driver(spitz_driver);

 MODULE_AUTHOR("Richard Purdie");
 MODULE_DESCRIPTION("ALSA SoC Spitz");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:spitz-audio");
	/*
	* spitz.c -- SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
	*
	* Copyright 2005 Wolfson Microelectronics PLC.
	* Copyright 2005 Openedhand Ltd.
	*
	* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
	* Richard Purdie <richard@openedhand.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; either version 2 of the License, or (at your
	* option) any later version.
	*
	*/

	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/timer.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/gpio.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>

	#include <asm/mach-types.h>
	#include <mach/spitz.h>
	#include "../codecs/wm8750.h"
	#include "pxa2xx-i2s.h"

	#define SPITZ_HP 0
	#define SPITZ_MIC 1
	#define SPITZ_LINE 2
	#define SPITZ_HEADSET 3
	#define SPITZ_HP_OFF 4
	#define SPITZ_SPK_ON 0
	#define SPITZ_SPK_OFF 1

	/* audio clock in Hz - rounded from 12.235MHz */
	#define SPITZ_AUDIO_CLOCK 12288000

	static int spitz_jack_func;
	static int spitz_spk_func;
	static int spitz_mic_gpio;

	static void spitz_ext_control(struct snd_soc_dapm_context *dapm)
	{
	snd_soc_dapm_mutex_lock(dapm);

	if (spitz_spk_func == SPITZ_SPK_ON)
	snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
	else
	snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");

	/* set up jack connection */
	switch (spitz_jack_func) {
	case SPITZ_HP:
	/* enable and unmute hp jack, disable mic bias */
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
	gpio_set_value(SPITZ_GPIO_MUTE_L, 1);
	gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
	break;
	case SPITZ_MIC:
	/* enable mic jack and bias, mute hp */
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
	gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
	gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
	break;
	case SPITZ_LINE:
	/* enable line jack, disable mic bias and mute hp */
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
	gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
	gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
	break;
	case SPITZ_HEADSET:
	/* enable and unmute headset jack enable mic bias, mute L hp */
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
	snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
	gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
	gpio_set_value(SPITZ_GPIO_MUTE_R, 1);
	break;
	case SPITZ_HP_OFF:

	/* jack removed, everything off */
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
	snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
	gpio_set_value(SPITZ_GPIO_MUTE_L, 0);
	gpio_set_value(SPITZ_GPIO_MUTE_R, 0);
	break;
	}

	snd_soc_dapm_sync_unlocked(dapm);

	snd_soc_dapm_mutex_unlock(dapm);
	}

	static int spitz_startup(struct snd_pcm_substream *substream)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	/* check the jack status at stream startup */
	spitz_ext_control(&rtd->card->dapm);

	return 0;
	}

	static int spitz_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;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	unsigned int clk = 0;
	int ret = 0;

	switch (params_rate(params)) {
	case 8000:
	case 16000:
	case 48000:
	case 96000:
	clk = 12288000;
	break;
	case 11025:
	case 22050:
	case 44100:
	clk = 11289600;
	break;
	}

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
	SND_SOC_CLOCK_IN);
	if (ret < 0)
	return ret;

	/* set the I2S system clock as input (unused) */
	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
	SND_SOC_CLOCK_IN);
	if (ret < 0)
	return ret;

	return 0;
	}

	static struct snd_soc_ops spitz_ops = {
	.startup = spitz_startup,
	.hw_params = spitz_hw_params,
	};

	static int spitz_get_jack(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	ucontrol->value.integer.value[0] = spitz_jack_func;
	return 0;
	}

	static int spitz_set_jack(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

	if (spitz_jack_func == ucontrol->value.integer.value[0])
	return 0;

	spitz_jack_func = ucontrol->value.integer.value[0];
	spitz_ext_control(&card->dapm);
	return 1;
	}

	static int spitz_get_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	ucontrol->value.integer.value[0] = spitz_spk_func;
	return 0;
	}

	static int spitz_set_spk(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);

	if (spitz_spk_func == ucontrol->value.integer.value[0])
	return 0;

	spitz_spk_func = ucontrol->value.integer.value[0];
	spitz_ext_control(&card->dapm);
	return 1;
	}

	static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *k, int event)
	{
	gpio_set_value_cansleep(spitz_mic_gpio, SND_SOC_DAPM_EVENT_ON(event));
	return 0;
	}

	/* spitz machine dapm widgets */
	static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	SND_SOC_DAPM_LINE("Line Jack", NULL),

	/* headset is a mic and mono headphone */
	SND_SOC_DAPM_HP("Headset Jack", NULL),
	};

	/* Spitz machine audio_map */
	static const struct snd_soc_dapm_route spitz_audio_map[] = {

	/* headphone connected to LOUT1, ROUT1 */
	{"Headphone Jack", NULL, "LOUT1"},
	{"Headphone Jack", NULL, "ROUT1"},

	/* headset connected to ROUT1 and LINPUT1 with bias (def below) */
	{"Headset Jack", NULL, "ROUT1"},

	/* ext speaker connected to LOUT2, ROUT2 */
	{"Ext Spk", NULL , "ROUT2"},
	{"Ext Spk", NULL , "LOUT2"},

	/* mic is connected to input 1 - with bias */
	{"LINPUT1", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Mic Jack"},

	/* line is connected to input 1 - no bias */
	{"LINPUT1", NULL, "Line Jack"},
	};

	static const char *jack_function[] = {"Headphone", "Mic", "Line", "Headset",
	"Off"};
	static const char *spk_function[] = {"On", "Off"};
	static const struct soc_enum spitz_enum[] = {
	SOC_ENUM_SINGLE_EXT(5, jack_function),
	SOC_ENUM_SINGLE_EXT(2, spk_function),
	};

	static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
	SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
	spitz_set_jack),
	SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
	spitz_set_spk),
	};

	/* spitz digital audio interface glue - connects codec <--> CPU */
	static struct snd_soc_dai_link spitz_dai = {
	.name = "wm8750",
	.stream_name = "WM8750",
	.cpu_dai_name = "pxa2xx-i2s",
	.codec_dai_name = "wm8750-hifi",
	.platform_name = "pxa-pcm-audio",
	.codec_name = "wm8750.0-001b",
	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
	SND_SOC_DAIFMT_CBS_CFS,
	.ops = &spitz_ops,
	};

	/* spitz audio machine driver */
	static struct snd_soc_card snd_soc_spitz = {
	.name = "Spitz",
	.owner = THIS_MODULE,
	.dai_link = &spitz_dai,
	.num_links = 1,

	.controls = wm8750_spitz_controls,
	.num_controls = ARRAY_SIZE(wm8750_spitz_controls),
	.dapm_widgets = wm8750_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
	.dapm_routes = spitz_audio_map,
	.num_dapm_routes = ARRAY_SIZE(spitz_audio_map),
	.fully_routed = true,
	};

	static int spitz_probe(struct platform_device *pdev)
	{
	struct snd_soc_card *card = &snd_soc_spitz;
	int ret;

	if (machine_is_akita())
	spitz_mic_gpio = AKITA_GPIO_MIC_BIAS;
	else
	spitz_mic_gpio = SPITZ_GPIO_MIC_BIAS;

	ret = gpio_request(spitz_mic_gpio, "MIC GPIO");
	if (ret)
	goto err1;

	ret = gpio_direction_output(spitz_mic_gpio, 0);
	if (ret)
	goto err2;

	card->dev = &pdev->dev;

	ret = snd_soc_register_card(card);
	if (ret) {
	dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
	ret);
	goto err2;
	}

	return 0;

	err2:
	gpio_free(spitz_mic_gpio);
	err1:
	return ret;
	}

	static int spitz_remove(struct platform_device *pdev)
	{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	snd_soc_unregister_card(card);
	gpio_free(spitz_mic_gpio);
	return 0;
	}

	static struct platform_driver spitz_driver = {
	.driver = {
	.name = "spitz-audio",
	.pm = &snd_soc_pm_ops,
	},
	.probe = spitz_probe,
	.remove = spitz_remove,
	};

	module_platform_driver(spitz_driver);

	MODULE_AUTHOR("Richard Purdie");
	MODULE_DESCRIPTION("ALSA SoC Spitz");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:spitz-audio");