sound/soc/davinci/davinci-evm.c - kernel/msm - Gitiles

 /*
  * ASoC driver for TI DAVINCI EVM platform
  *
  * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.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.
  */

 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/soc.h>

 #include <asm/dma.h>
 #include <asm/mach-types.h>

 #include <mach/asp.h>
 #include <mach/edma.h>
 #include <mach/mux.h>

 #include "davinci-pcm.h"
 #include "davinci-i2s.h"
 #include "davinci-mcasp.h"

 #define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
 		SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
 static int evm_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;
 	int ret = 0;
 	unsigned sysclk;

 	/* ASP1 on DM355 EVM is clocked by an external oscillator */
 	if (machine_is_davinci_dm355_evm() || machine_is_davinci_dm6467_evm() ||
 	    machine_is_davinci_dm365_evm())
 		sysclk = 27000000;

 	/* ASP0 in DM6446 EVM is clocked by U55, as configured by
 	 * board-dm644x-evm.c using GPIOs from U18.  There are six
 	 * options; here we "know" we use a 48 KHz sample rate.
 	 */
 	else if (machine_is_davinci_evm())
 		sysclk = 12288000;

 	else if (machine_is_davinci_da830_evm() ||
 				machine_is_davinci_da850_evm())
 		sysclk = 24576000;

 	else
 		return -EINVAL;

 	/* set codec DAI configuration */
 	ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
 	if (ret < 0)
 		return ret;

 	/* set cpu DAI configuration */
 	ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
 	if (ret < 0)
 		return ret;

 	/* set the codec system clock */
 	ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static int evm_spdif_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 *cpu_dai = rtd->cpu_dai;

 	/* set cpu DAI configuration */
 	return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
 }

 static struct snd_soc_ops evm_ops = {
 	.hw_params = evm_hw_params,
 };

 static struct snd_soc_ops evm_spdif_ops = {
 	.hw_params = evm_spdif_hw_params,
 };

 /* davinci-evm machine dapm widgets */
 static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_LINE("Line Out", NULL),
 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),
 };

 /* davinci-evm machine audio_mapnections to the codec pins */
 static const struct snd_soc_dapm_route audio_map[] = {
 	/* Headphone connected to HPLOUT, HPROUT */
 	{"Headphone Jack", NULL, "HPLOUT"},
 	{"Headphone Jack", NULL, "HPROUT"},

 	/* Line Out connected to LLOUT, RLOUT */
 	{"Line Out", NULL, "LLOUT"},
 	{"Line Out", NULL, "RLOUT"},

 	/* Mic connected to (MIC3L | MIC3R) */
 	{"MIC3L", NULL, "Mic Bias 2V"},
 	{"MIC3R", NULL, "Mic Bias 2V"},
 	{"Mic Bias 2V", NULL, "Mic Jack"},

 	/* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
 	{"LINE1L", NULL, "Line In"},
 	{"LINE2L", NULL, "Line In"},
 	{"LINE1R", NULL, "Line In"},
 	{"LINE2R", NULL, "Line In"},
 };

 /* Logic for a aic3x as connected on a davinci-evm */
 static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;

 	/* Add davinci-evm specific widgets */
 	snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
 				  ARRAY_SIZE(aic3x_dapm_widgets));

 	/* Set up davinci-evm specific audio path audio_map */
 	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

 	/* not connected */
 	snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
 	snd_soc_dapm_disable_pin(dapm, "HPLCOM");
 	snd_soc_dapm_disable_pin(dapm, "HPRCOM");

 	/* always connected */
 	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 	snd_soc_dapm_enable_pin(dapm, "Line Out");
 	snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 	snd_soc_dapm_enable_pin(dapm, "Line In");

 	snd_soc_dapm_sync(dapm);

 	return 0;
 }

 /* davinci-evm digital audio interface glue - connects codec <--> CPU */
 static struct snd_soc_dai_link dm6446_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.cpu_dai_name = "davinci-mcbsp",
 	.codec_dai_name = "tlv320aic3x-hifi",
 	.codec_name = "tlv320aic3x-codec.1-001b",
 	.platform_name = "davinci-pcm-audio",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 };

 static struct snd_soc_dai_link dm355_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.cpu_dai_name = "davinci-mcbsp.1",
 	.codec_dai_name = "tlv320aic3x-hifi",
 	.codec_name = "tlv320aic3x-codec.1-001b",
 	.platform_name = "davinci-pcm-audio",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 };

 static struct snd_soc_dai_link dm365_evm_dai = {
 #ifdef CONFIG_SND_DM365_AIC3X_CODEC
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.cpu_dai_name = "davinci-mcbsp",
 	.codec_dai_name = "tlv320aic3x-hifi",
 	.init = evm_aic3x_init,
 	.codec_name = "tlv320aic3x-codec.1-0018",
 	.ops = &evm_ops,
 #elif defined(CONFIG_SND_DM365_VOICE_CODEC)
 	.name = "Voice Codec - CQ93VC",
 	.stream_name = "CQ93",
 	.cpu_dai_name = "davinci-vcif",
 	.codec_dai_name = "cq93vc-hifi",
 	.codec_name = "cq93vc-codec",
 #endif
 	.platform_name = "davinci-pcm-audio",
 };

 static struct snd_soc_dai_link dm6467_evm_dai[] = {
 	{
 		.name = "TLV320AIC3X",
 		.stream_name = "AIC3X",
 		.cpu_dai_name= "davinci-mcasp.0",
 		.codec_dai_name = "tlv320aic3x-hifi",
 		.platform_name ="davinci-pcm-audio",
 		.codec_name = "tlv320aic3x-codec.0-001a",
 		.init = evm_aic3x_init,
 		.ops = &evm_ops,
 	},
 	{
 		.name = "McASP",
 		.stream_name = "spdif",
 		.cpu_dai_name= "davinci-mcasp.1",
 		.codec_dai_name = "dit-hifi",
 		.codec_name = "spdif_dit",
 		.platform_name = "davinci-pcm-audio",
 		.ops = &evm_spdif_ops,
 	},
 };

 static struct snd_soc_dai_link da830_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.cpu_dai_name = "davinci-mcasp.1",
 	.codec_dai_name = "tlv320aic3x-hifi",
 	.codec_name = "tlv320aic3x-codec.1-0018",
 	.platform_name = "davinci-pcm-audio",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 };

 static struct snd_soc_dai_link da850_evm_dai = {
 	.name = "TLV320AIC3X",
 	.stream_name = "AIC3X",
 	.cpu_dai_name= "davinci-mcasp.0",
 	.codec_dai_name = "tlv320aic3x-hifi",
 	.codec_name = "tlv320aic3x-codec.1-0018",
 	.platform_name = "davinci-pcm-audio",
 	.init = evm_aic3x_init,
 	.ops = &evm_ops,
 };

 /* davinci dm6446 evm audio machine driver */
 static struct snd_soc_card dm6446_snd_soc_card_evm = {
 	.name = "DaVinci DM6446 EVM",
 	.dai_link = &dm6446_evm_dai,
 	.num_links = 1,
 };

 /* davinci dm355 evm audio machine driver */
 static struct snd_soc_card dm355_snd_soc_card_evm = {
 	.name = "DaVinci DM355 EVM",
 	.dai_link = &dm355_evm_dai,
 	.num_links = 1,
 };

 /* davinci dm365 evm audio machine driver */
 static struct snd_soc_card dm365_snd_soc_card_evm = {
 	.name = "DaVinci DM365 EVM",
 	.dai_link = &dm365_evm_dai,
 	.num_links = 1,
 };

 /* davinci dm6467 evm audio machine driver */
 static struct snd_soc_card dm6467_snd_soc_card_evm = {
 	.name = "DaVinci DM6467 EVM",
 	.dai_link = dm6467_evm_dai,
 	.num_links = ARRAY_SIZE(dm6467_evm_dai),
 };

 static struct snd_soc_card da830_snd_soc_card = {
 	.name = "DA830/OMAP-L137 EVM",
 	.dai_link = &da830_evm_dai,
 	.num_links = 1,
 };

 static struct snd_soc_card da850_snd_soc_card = {
 	.name = "DA850/OMAP-L138 EVM",
 	.dai_link = &da850_evm_dai,
 	.num_links = 1,
 };

 static struct platform_device *evm_snd_device;

 static int __init evm_init(void)
 {
 	struct snd_soc_card *evm_snd_dev_data;
 	int index;
 	int ret;

 	if (machine_is_davinci_evm()) {
 		evm_snd_dev_data = &dm6446_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_dm355_evm()) {
 		evm_snd_dev_data = &dm355_snd_soc_card_evm;
 		index = 1;
 	} else if (machine_is_davinci_dm365_evm()) {
 		evm_snd_dev_data = &dm365_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_dm6467_evm()) {
 		evm_snd_dev_data = &dm6467_snd_soc_card_evm;
 		index = 0;
 	} else if (machine_is_davinci_da830_evm()) {
 		evm_snd_dev_data = &da830_snd_soc_card;
 		index = 1;
 	} else if (machine_is_davinci_da850_evm()) {
 		evm_snd_dev_data = &da850_snd_soc_card;
 		index = 0;
 	} else
 		return -EINVAL;

 	evm_snd_device = platform_device_alloc("soc-audio", index);
 	if (!evm_snd_device)
 		return -ENOMEM;

 	platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
 	ret = platform_device_add(evm_snd_device);
 	if (ret)
 		platform_device_put(evm_snd_device);

 	return ret;
 }

 static void __exit evm_exit(void)
 {
 	platform_device_unregister(evm_snd_device);
 }

 module_init(evm_init);
 module_exit(evm_exit);

 MODULE_AUTHOR("Vladimir Barinov");
 MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
 MODULE_LICENSE("GPL");
	/*
	* ASoC driver for TI DAVINCI EVM platform
	*
	* Author: Vladimir Barinov, <vbarinov@embeddedalley.com>
	* Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.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.
	*/

	#include <linux/module.h>
	#include <linux/moduleparam.h>
	#include <linux/timer.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>
	#include <sound/core.h>
	#include <sound/pcm.h>
	#include <sound/soc.h>

	#include <asm/dma.h>
	#include <asm/mach-types.h>

	#include <mach/asp.h>
	#include <mach/edma.h>
	#include <mach/mux.h>

	#include "davinci-pcm.h"
	#include "davinci-i2s.h"
	#include "davinci-mcasp.h"

	#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B \| \
	SND_SOC_DAIFMT_CBM_CFM \| SND_SOC_DAIFMT_IB_NF)
	static int evm_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;
	int ret = 0;
	unsigned sysclk;

	/* ASP1 on DM355 EVM is clocked by an external oscillator */
	if (machine_is_davinci_dm355_evm() \|\| machine_is_davinci_dm6467_evm() \|\|
	machine_is_davinci_dm365_evm())
	sysclk = 27000000;

	/* ASP0 in DM6446 EVM is clocked by U55, as configured by
	* board-dm644x-evm.c using GPIOs from U18. There are six
	* options; here we "know" we use a 48 KHz sample rate.
	*/
	else if (machine_is_davinci_evm())
	sysclk = 12288000;

	else if (machine_is_davinci_da830_evm() \|\|
	machine_is_davinci_da850_evm())
	sysclk = 24576000;

	else
	return -EINVAL;

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
	if (ret < 0)
	return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
	if (ret < 0)
	return ret;

	/* set the codec system clock */
	ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
	if (ret < 0)
	return ret;

	return 0;
	}

	static int evm_spdif_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 *cpu_dai = rtd->cpu_dai;

	/* set cpu DAI configuration */
	return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
	}

	static struct snd_soc_ops evm_ops = {
	.hw_params = evm_hw_params,
	};

	static struct snd_soc_ops evm_spdif_ops = {
	.hw_params = evm_spdif_hw_params,
	};

	/* davinci-evm machine dapm widgets */
	static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
	};

	/* davinci-evm machine audio_mapnections to the codec pins */
	static const struct snd_soc_dapm_route audio_map[] = {
	/* Headphone connected to HPLOUT, HPROUT */
	{"Headphone Jack", NULL, "HPLOUT"},
	{"Headphone Jack", NULL, "HPROUT"},

	/* Line Out connected to LLOUT, RLOUT */
	{"Line Out", NULL, "LLOUT"},
	{"Line Out", NULL, "RLOUT"},

	/* Mic connected to (MIC3L \| MIC3R) */
	{"MIC3L", NULL, "Mic Bias 2V"},
	{"MIC3R", NULL, "Mic Bias 2V"},
	{"Mic Bias 2V", NULL, "Mic Jack"},

	/* Line In connected to (LINE1L \| LINE2L), (LINE1R \| LINE2R) */
	{"LINE1L", NULL, "Line In"},
	{"LINE2L", NULL, "Line In"},
	{"LINE1R", NULL, "Line In"},
	{"LINE2R", NULL, "Line In"},
	};

	/* Logic for a aic3x as connected on a davinci-evm */
	static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	/* Add davinci-evm specific widgets */
	snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
	ARRAY_SIZE(aic3x_dapm_widgets));

	/* Set up davinci-evm specific audio path audio_map */
	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

	/* not connected */
	snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
	snd_soc_dapm_disable_pin(dapm, "HPLCOM");
	snd_soc_dapm_disable_pin(dapm, "HPRCOM");

	/* always connected */
	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
	snd_soc_dapm_enable_pin(dapm, "Line Out");
	snd_soc_dapm_enable_pin(dapm, "Mic Jack");
	snd_soc_dapm_enable_pin(dapm, "Line In");

	snd_soc_dapm_sync(dapm);

	return 0;
	}

	/* davinci-evm digital audio interface glue - connects codec <--> CPU */
	static struct snd_soc_dai_link dm6446_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name = "davinci-mcbsp",
	.codec_dai_name = "tlv320aic3x-hifi",
	.codec_name = "tlv320aic3x-codec.1-001b",
	.platform_name = "davinci-pcm-audio",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	};

	static struct snd_soc_dai_link dm355_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name = "davinci-mcbsp.1",
	.codec_dai_name = "tlv320aic3x-hifi",
	.codec_name = "tlv320aic3x-codec.1-001b",
	.platform_name = "davinci-pcm-audio",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	};

	static struct snd_soc_dai_link dm365_evm_dai = {
	#ifdef CONFIG_SND_DM365_AIC3X_CODEC
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name = "davinci-mcbsp",
	.codec_dai_name = "tlv320aic3x-hifi",
	.init = evm_aic3x_init,
	.codec_name = "tlv320aic3x-codec.1-0018",
	.ops = &evm_ops,
	#elif defined(CONFIG_SND_DM365_VOICE_CODEC)
	.name = "Voice Codec - CQ93VC",
	.stream_name = "CQ93",
	.cpu_dai_name = "davinci-vcif",
	.codec_dai_name = "cq93vc-hifi",
	.codec_name = "cq93vc-codec",
	#endif
	.platform_name = "davinci-pcm-audio",
	};

	static struct snd_soc_dai_link dm6467_evm_dai[] = {
	{
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name= "davinci-mcasp.0",
	.codec_dai_name = "tlv320aic3x-hifi",
	.platform_name ="davinci-pcm-audio",
	.codec_name = "tlv320aic3x-codec.0-001a",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	},
	{
	.name = "McASP",
	.stream_name = "spdif",
	.cpu_dai_name= "davinci-mcasp.1",
	.codec_dai_name = "dit-hifi",
	.codec_name = "spdif_dit",
	.platform_name = "davinci-pcm-audio",
	.ops = &evm_spdif_ops,
	},
	};

	static struct snd_soc_dai_link da830_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name = "davinci-mcasp.1",
	.codec_dai_name = "tlv320aic3x-hifi",
	.codec_name = "tlv320aic3x-codec.1-0018",
	.platform_name = "davinci-pcm-audio",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	};

	static struct snd_soc_dai_link da850_evm_dai = {
	.name = "TLV320AIC3X",
	.stream_name = "AIC3X",
	.cpu_dai_name= "davinci-mcasp.0",
	.codec_dai_name = "tlv320aic3x-hifi",
	.codec_name = "tlv320aic3x-codec.1-0018",
	.platform_name = "davinci-pcm-audio",
	.init = evm_aic3x_init,
	.ops = &evm_ops,
	};

	/* davinci dm6446 evm audio machine driver */
	static struct snd_soc_card dm6446_snd_soc_card_evm = {
	.name = "DaVinci DM6446 EVM",
	.dai_link = &dm6446_evm_dai,
	.num_links = 1,
	};

	/* davinci dm355 evm audio machine driver */
	static struct snd_soc_card dm355_snd_soc_card_evm = {
	.name = "DaVinci DM355 EVM",
	.dai_link = &dm355_evm_dai,
	.num_links = 1,
	};

	/* davinci dm365 evm audio machine driver */
	static struct snd_soc_card dm365_snd_soc_card_evm = {
	.name = "DaVinci DM365 EVM",
	.dai_link = &dm365_evm_dai,
	.num_links = 1,
	};

	/* davinci dm6467 evm audio machine driver */
	static struct snd_soc_card dm6467_snd_soc_card_evm = {
	.name = "DaVinci DM6467 EVM",
	.dai_link = dm6467_evm_dai,
	.num_links = ARRAY_SIZE(dm6467_evm_dai),
	};

	static struct snd_soc_card da830_snd_soc_card = {
	.name = "DA830/OMAP-L137 EVM",
	.dai_link = &da830_evm_dai,
	.num_links = 1,
	};

	static struct snd_soc_card da850_snd_soc_card = {
	.name = "DA850/OMAP-L138 EVM",
	.dai_link = &da850_evm_dai,
	.num_links = 1,
	};

	static struct platform_device *evm_snd_device;

	static int __init evm_init(void)
	{
	struct snd_soc_card *evm_snd_dev_data;
	int index;
	int ret;

	if (machine_is_davinci_evm()) {
	evm_snd_dev_data = &dm6446_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_dm355_evm()) {
	evm_snd_dev_data = &dm355_snd_soc_card_evm;
	index = 1;
	} else if (machine_is_davinci_dm365_evm()) {
	evm_snd_dev_data = &dm365_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_dm6467_evm()) {
	evm_snd_dev_data = &dm6467_snd_soc_card_evm;
	index = 0;
	} else if (machine_is_davinci_da830_evm()) {
	evm_snd_dev_data = &da830_snd_soc_card;
	index = 1;
	} else if (machine_is_davinci_da850_evm()) {
	evm_snd_dev_data = &da850_snd_soc_card;
	index = 0;
	} else
	return -EINVAL;

	evm_snd_device = platform_device_alloc("soc-audio", index);
	if (!evm_snd_device)
	return -ENOMEM;

	platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
	ret = platform_device_add(evm_snd_device);
	if (ret)
	platform_device_put(evm_snd_device);

	return ret;
	}

	static void __exit evm_exit(void)
	{
	platform_device_unregister(evm_snd_device);
	}

	module_init(evm_init);
	module_exit(evm_exit);

	MODULE_AUTHOR("Vladimir Barinov");
	MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
	MODULE_LICENSE("GPL");