sound/soc/omap/omap3pandora.c - maze/linux - Git at Google

 /*
  * omap3pandora.c  --  SoC audio for Pandora Handheld Console
  *
  * Author: Gražvydas Ignotas <notasas@gmail.com>
  *
  * 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.
  *
  * 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., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA
  *
  */

 #include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/delay.h>

 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>

 #include <asm/mach-types.h>

 #include "omap-mcbsp.h"
 #include "omap-pcm.h"
 #include "../codecs/twl4030.h"

 #define OMAP3_PANDORA_DAC_POWER_GPIO	118
 #define OMAP3_PANDORA_AMP_POWER_GPIO	14

 #define PREFIX "ASoC omap3pandora: "

 static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
 	struct snd_soc_dai *cpu_dai, unsigned int fmt)
 {
 	int ret;

 	/* Set codec DAI configuration */
 	ret = snd_soc_dai_set_fmt(codec_dai, fmt);
 	if (ret < 0) {
 		pr_err(PREFIX "can't set codec DAI configuration\n");
 		return ret;
 	}

 	/* Set cpu DAI configuration */
 	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
 	if (ret < 0) {
 		pr_err(PREFIX "can't set cpu DAI configuration\n");
 		return ret;
 	}

 	/* Set the codec system clock for DAC and ADC */
 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
 					    SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		pr_err(PREFIX "can't set codec system clock\n");
 		return ret;
 	}

 	/* Set McBSP clock to external */
 	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
 					    SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		pr_err(PREFIX "can't set cpu system clock\n");
 		return ret;
 	}

 	ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
 	if (ret < 0) {
 		pr_err(PREFIX "can't set SRG clock divider\n");
 		return ret;
 	}

 	return 0;
 }

 static int omap3pandora_out_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->dai->codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

 	return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
 					  SND_SOC_DAIFMT_I2S |
 					  SND_SOC_DAIFMT_IB_NF |
 					  SND_SOC_DAIFMT_CBS_CFS);
 }

 static int omap3pandora_in_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->dai->codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

 	return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
 					  SND_SOC_DAIFMT_I2S |
 					  SND_SOC_DAIFMT_NB_NF |
 					  SND_SOC_DAIFMT_CBS_CFS);
 }

 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *k, int event)
 {
 	if (SND_SOC_DAPM_EVENT_ON(event)) {
 		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
 		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
 	} else {
 		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 		mdelay(1);
 		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 	}

 	return 0;
 }

 /*
  * Audio paths on Pandora board:
  *
  *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
  *  |M|         A    +--------> Line Out
  *  |A| <~~clk~~+
  *  |P| <--- TWL4030 <--------- Line In and MICs
  */
 static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
 	SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
 			   0, 0, NULL, 0, omap3pandora_hp_event,
 			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_LINE("Line Out", NULL),
 };

 static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
 	SND_SOC_DAPM_MIC("Mic (internal)", NULL),
 	SND_SOC_DAPM_MIC("Mic (external)", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),
 };

 static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
 	{"Headphone Amplifier", NULL, "PCM DAC"},
 	{"Line Out", NULL, "PCM DAC"},
 	{"Headphone Jack", NULL, "Headphone Amplifier"},
 };

 static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
 	{"AUXL", NULL, "Line In"},
 	{"AUXR", NULL, "Line In"},

 	{"MAINMIC", NULL, "Mic Bias 1"},
 	{"Mic Bias 1", NULL, "Mic (internal)"},

 	{"SUBMIC", NULL, "Mic Bias 2"},
 	{"Mic Bias 2", NULL, "Mic (external)"},
 };

 static int omap3pandora_out_init(struct snd_soc_codec *codec)
 {
 	int ret;

 	/* All TWL4030 output pins are floating */
 	snd_soc_dapm_nc_pin(codec, "OUTL");
 	snd_soc_dapm_nc_pin(codec, "OUTR");
 	snd_soc_dapm_nc_pin(codec, "EARPIECE");
 	snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
 	snd_soc_dapm_nc_pin(codec, "PREDRIVER");
 	snd_soc_dapm_nc_pin(codec, "HSOL");
 	snd_soc_dapm_nc_pin(codec, "HSOR");
 	snd_soc_dapm_nc_pin(codec, "CARKITL");
 	snd_soc_dapm_nc_pin(codec, "CARKITR");
 	snd_soc_dapm_nc_pin(codec, "HFL");
 	snd_soc_dapm_nc_pin(codec, "HFR");

 	ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
 				ARRAY_SIZE(omap3pandora_out_dapm_widgets));
 	if (ret < 0)
 		return ret;

 	snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
 		ARRAY_SIZE(omap3pandora_out_map));

 	return snd_soc_dapm_sync(codec);
 }

 static int omap3pandora_in_init(struct snd_soc_codec *codec)
 {
 	int ret;

 	/* Not comnnected */
 	snd_soc_dapm_nc_pin(codec, "HSMIC");
 	snd_soc_dapm_nc_pin(codec, "CARKITMIC");
 	snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
 	snd_soc_dapm_nc_pin(codec, "DIGIMIC1");

 	ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
 				ARRAY_SIZE(omap3pandora_in_dapm_widgets));
 	if (ret < 0)
 		return ret;

 	snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
 		ARRAY_SIZE(omap3pandora_in_map));

 	return snd_soc_dapm_sync(codec);
 }

 static struct snd_soc_ops omap3pandora_out_ops = {
 	.hw_params = omap3pandora_out_hw_params,
 };

 static struct snd_soc_ops omap3pandora_in_ops = {
 	.hw_params = omap3pandora_in_hw_params,
 };

 /* Digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link omap3pandora_dai[] = {
 	{
 		.name = "PCM1773",
 		.stream_name = "HiFi Out",
 		.cpu_dai = &omap_mcbsp_dai[0],
 		.codec_dai = &twl4030_dai,
 		.ops = &omap3pandora_out_ops,
 		.init = omap3pandora_out_init,
 	}, {
 		.name = "TWL4030",
 		.stream_name = "Line/Mic In",
 		.cpu_dai = &omap_mcbsp_dai[1],
 		.codec_dai = &twl4030_dai,
 		.ops = &omap3pandora_in_ops,
 		.init = omap3pandora_in_init,
 	}
 };

 /* SoC card */
 static struct snd_soc_card snd_soc_card_omap3pandora = {
 	.name = "omap3pandora",
 	.platform = &omap_soc_platform,
 	.dai_link = omap3pandora_dai,
 	.num_links = ARRAY_SIZE(omap3pandora_dai),
 };

 /* Audio subsystem */
 static struct snd_soc_device omap3pandora_snd_data = {
 	.card = &snd_soc_card_omap3pandora,
 	.codec_dev = &soc_codec_dev_twl4030,
 };

 static struct platform_device *omap3pandora_snd_device;

 static int __init omap3pandora_soc_init(void)
 {
 	int ret;

 	if (!machine_is_omap3_pandora())
 		return -ENODEV;

 	pr_info("OMAP3 Pandora SoC init\n");

 	ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
 	if (ret) {
 		pr_err(PREFIX "Failed to get DAC power GPIO\n");
 		return ret;
 	}

 	ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
 	if (ret) {
 		pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
 		goto fail0;
 	}

 	ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
 	if (ret) {
 		pr_err(PREFIX "Failed to get amp power GPIO\n");
 		goto fail0;
 	}

 	ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
 	if (ret) {
 		pr_err(PREFIX "Failed to set amp power GPIO direction\n");
 		goto fail1;
 	}

 	omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
 	if (omap3pandora_snd_device == NULL) {
 		pr_err(PREFIX "Platform device allocation failed\n");
 		ret = -ENOMEM;
 		goto fail1;
 	}

 	platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
 	omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
 	*(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
 	*(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */

 	ret = platform_device_add(omap3pandora_snd_device);
 	if (ret) {
 		pr_err(PREFIX "Unable to add platform device\n");
 		goto fail2;
 	}

 	return 0;

 fail2:
 	platform_device_put(omap3pandora_snd_device);
 fail1:
 	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 fail0:
 	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 	return ret;
 }
 module_init(omap3pandora_soc_init);

 static void __exit omap3pandora_soc_exit(void)
 {
 	platform_device_unregister(omap3pandora_snd_device);
 	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
 	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
 }
 module_exit(omap3pandora_soc_exit);

 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
 MODULE_LICENSE("GPL");
	/*
	* omap3pandora.c -- SoC audio for Pandora Handheld Console
	*
	* Author: Gražvydas Ignotas <notasas@gmail.com>
	*
	* 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.
	*
	* 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., 51 Franklin St, Fifth Floor, Boston, MA
	* 02110-1301 USA
	*
	*/

	#include <linux/clk.h>
	#include <linux/platform_device.h>
	#include <linux/gpio.h>
	#include <linux/delay.h>

	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>
	#include <sound/soc-dapm.h>

	#include <asm/mach-types.h>

	#include "omap-mcbsp.h"
	#include "omap-pcm.h"
	#include "../codecs/twl4030.h"

	#define OMAP3_PANDORA_DAC_POWER_GPIO 118
	#define OMAP3_PANDORA_AMP_POWER_GPIO 14

	#define PREFIX "ASoC omap3pandora: "

	static int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
	struct snd_soc_dai *cpu_dai, unsigned int fmt)
	{
	int ret;

	/* Set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, fmt);
	if (ret < 0) {
	pr_err(PREFIX "can't set codec DAI configuration\n");
	return ret;
	}

	/* Set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
	if (ret < 0) {
	pr_err(PREFIX "can't set cpu DAI configuration\n");
	return ret;
	}

	/* Set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err(PREFIX "can't set codec system clock\n");
	return ret;
	}

	/* Set McBSP clock to external */
	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 0,
	SND_SOC_CLOCK_IN);
	if (ret < 0) {
	pr_err(PREFIX "can't set cpu system clock\n");
	return ret;
	}

	ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
	if (ret < 0) {
	pr_err(PREFIX "can't set SRG clock divider\n");
	return ret;
	}

	return 0;
	}

	static int omap3pandora_out_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->dai->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
	SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_IB_NF \|
	SND_SOC_DAIFMT_CBS_CFS);
	}

	static int omap3pandora_in_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->dai->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;

	return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
	SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_NB_NF \|
	SND_SOC_DAIFMT_CBS_CFS);
	}

	static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *k, int event)
	{
	if (SND_SOC_DAPM_EVENT_ON(event)) {
	gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
	gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
	} else {
	gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
	mdelay(1);
	gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
	}

	return 0;
	}

	/*
	* Audio paths on Pandora board:
	*
	* \|O\| ---> PCM DAC +-> AMP -> Headphone Jack
	* \|M\| A +--------> Line Out
	* \|A\| <~~clk~~+
	* \|P\| <--- TWL4030 <--------- Line In and MICs
	*/
	static const struct snd_soc_dapm_widget omap3pandora_out_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
	0, 0, NULL, 0, omap3pandora_hp_event,
	SND_SOC_DAPM_POST_PMU \| SND_SOC_DAPM_PRE_PMD),
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	};

	static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
	SND_SOC_DAPM_MIC("Mic (internal)", NULL),
	SND_SOC_DAPM_MIC("Mic (external)", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
	};

	static const struct snd_soc_dapm_route omap3pandora_out_map[] = {
	{"Headphone Amplifier", NULL, "PCM DAC"},
	{"Line Out", NULL, "PCM DAC"},
	{"Headphone Jack", NULL, "Headphone Amplifier"},
	};

	static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
	{"AUXL", NULL, "Line In"},
	{"AUXR", NULL, "Line In"},

	{"MAINMIC", NULL, "Mic Bias 1"},
	{"Mic Bias 1", NULL, "Mic (internal)"},

	{"SUBMIC", NULL, "Mic Bias 2"},
	{"Mic Bias 2", NULL, "Mic (external)"},
	};

	static int omap3pandora_out_init(struct snd_soc_codec *codec)
	{
	int ret;

	/* All TWL4030 output pins are floating */
	snd_soc_dapm_nc_pin(codec, "OUTL");
	snd_soc_dapm_nc_pin(codec, "OUTR");
	snd_soc_dapm_nc_pin(codec, "EARPIECE");
	snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
	snd_soc_dapm_nc_pin(codec, "PREDRIVER");
	snd_soc_dapm_nc_pin(codec, "HSOL");
	snd_soc_dapm_nc_pin(codec, "HSOR");
	snd_soc_dapm_nc_pin(codec, "CARKITL");
	snd_soc_dapm_nc_pin(codec, "CARKITR");
	snd_soc_dapm_nc_pin(codec, "HFL");
	snd_soc_dapm_nc_pin(codec, "HFR");

	ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
	ARRAY_SIZE(omap3pandora_out_dapm_widgets));
	if (ret < 0)
	return ret;

	snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
	ARRAY_SIZE(omap3pandora_out_map));

	return snd_soc_dapm_sync(codec);
	}

	static int omap3pandora_in_init(struct snd_soc_codec *codec)
	{
	int ret;

	/* Not comnnected */
	snd_soc_dapm_nc_pin(codec, "HSMIC");
	snd_soc_dapm_nc_pin(codec, "CARKITMIC");
	snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
	snd_soc_dapm_nc_pin(codec, "DIGIMIC1");

	ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
	ARRAY_SIZE(omap3pandora_in_dapm_widgets));
	if (ret < 0)
	return ret;

	snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
	ARRAY_SIZE(omap3pandora_in_map));

	return snd_soc_dapm_sync(codec);
	}

	static struct snd_soc_ops omap3pandora_out_ops = {
	.hw_params = omap3pandora_out_hw_params,
	};

	static struct snd_soc_ops omap3pandora_in_ops = {
	.hw_params = omap3pandora_in_hw_params,
	};

	/* Digital audio interface glue - connects codec <--> CPU */
	static struct snd_soc_dai_link omap3pandora_dai[] = {
	{
	.name = "PCM1773",
	.stream_name = "HiFi Out",
	.cpu_dai = &omap_mcbsp_dai[0],
	.codec_dai = &twl4030_dai,
	.ops = &omap3pandora_out_ops,
	.init = omap3pandora_out_init,
	}, {
	.name = "TWL4030",
	.stream_name = "Line/Mic In",
	.cpu_dai = &omap_mcbsp_dai[1],
	.codec_dai = &twl4030_dai,
	.ops = &omap3pandora_in_ops,
	.init = omap3pandora_in_init,
	}
	};

	/* SoC card */
	static struct snd_soc_card snd_soc_card_omap3pandora = {
	.name = "omap3pandora",
	.platform = &omap_soc_platform,
	.dai_link = omap3pandora_dai,
	.num_links = ARRAY_SIZE(omap3pandora_dai),
	};

	/* Audio subsystem */
	static struct snd_soc_device omap3pandora_snd_data = {
	.card = &snd_soc_card_omap3pandora,
	.codec_dev = &soc_codec_dev_twl4030,
	};

	static struct platform_device *omap3pandora_snd_device;

	static int __init omap3pandora_soc_init(void)
	{
	int ret;

	if (!machine_is_omap3_pandora())
	return -ENODEV;

	pr_info("OMAP3 Pandora SoC init\n");

	ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
	if (ret) {
	pr_err(PREFIX "Failed to get DAC power GPIO\n");
	return ret;
	}

	ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
	if (ret) {
	pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
	goto fail0;
	}

	ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
	if (ret) {
	pr_err(PREFIX "Failed to get amp power GPIO\n");
	goto fail0;
	}

	ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
	if (ret) {
	pr_err(PREFIX "Failed to set amp power GPIO direction\n");
	goto fail1;
	}

	omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
	if (omap3pandora_snd_device == NULL) {
	pr_err(PREFIX "Platform device allocation failed\n");
	ret = -ENOMEM;
	goto fail1;
	}

	platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
	omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
	(unsigned int )omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
	(unsigned int )omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */

	ret = platform_device_add(omap3pandora_snd_device);
	if (ret) {
	pr_err(PREFIX "Unable to add platform device\n");
	goto fail2;
	}

	return 0;

	fail2:
	platform_device_put(omap3pandora_snd_device);
	fail1:
	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
	fail0:
	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
	return ret;
	}
	module_init(omap3pandora_soc_init);

	static void __exit omap3pandora_soc_exit(void)
	{
	platform_device_unregister(omap3pandora_snd_device);
	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
	}
	module_exit(omap3pandora_soc_exit);

	MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
	MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
	MODULE_LICENSE("GPL");