sound/soc/ambarella/a5sevk.c - nest-cam/v350/linux - Git at Google

 /*
  * sound/soc/a5sevk.c
  *
  * Author: Cao Rongrong <rrcao@ambarella.com>
  *
  * History:
  *	2009/08/20 - [Cao Rongrong] Created file
  *	2011/03/20 - [Cao Rongrong] Port to 2.6.38,
  *				    merge coconut and durian into a5sevk
  *
  * Copyright (C) 2004-2009, Ambarella, Inc.
  *
  * 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.
  *
  * 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
  *
  */

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

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

 #include <mach/hardware.h>
 #include <plat/audio.h>

 //#define DROPCAM_R2
 #define CROWN_ROYAL
 #ifdef DROPCAM_R2
 #include "../codecs/ak4642_amb.h"
 #elif defined(CROWN_ROYAL)
 #include "../codecs/wm8974_amb.h"
 #endif

 static unsigned int dai_fmt = 0;
 module_param(dai_fmt, uint, 0644);
 MODULE_PARM_DESC(dai_fmt, "DAI format.");

 static int a5sevk_board_startup(struct snd_pcm_substream *substream)
 {
 	return 0;
 }

 static int a5sevk_board_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 errorCode = 0, amb_mclk, mclk, oversample, i2s_mode;

 	switch (params_rate(params)) {
 	case 8000:
 		amb_mclk = AudioCodec_2_048M;
 		mclk = 2048000;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 11025:
 		amb_mclk = AudioCodec_2_8224M;
 		mclk = 2822400;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 12000:
 		amb_mclk = AudioCodec_3_072M;
 		mclk = 3072000;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 16000:
 		amb_mclk = AudioCodec_4_096M;
 		mclk = 4096000;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 22050:
 		amb_mclk = AudioCodec_5_6448M;
 		mclk = 5644800;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 24000:
 		amb_mclk = AudioCodec_6_144;
 		mclk = 6144000;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 32000:
 		amb_mclk = AudioCodec_8_192M;
 		mclk = 8192000;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 44100:
 		amb_mclk = AudioCodec_11_2896M;
 		mclk = 11289600;
 		oversample = AudioCodec_256xfs;
 		break;
 	case 48000:
 		amb_mclk = AudioCodec_12_288M;
 		mclk = 12288000;
 		oversample = AudioCodec_256xfs;
 		break;
 	default:
 		errorCode = -EINVAL;
 		goto hw_params_exit;
 	}

 	if (dai_fmt == 0)
 		i2s_mode = SND_SOC_DAIFMT_I2S;
 	else
 		i2s_mode = SND_SOC_DAIFMT_DSP_A;

 	/* set the I2S system data format*/
 	errorCode = snd_soc_dai_set_fmt(codec_dai,
 		i2s_mode | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 	if (errorCode < 0) {
 		pr_err("can't set codec DAI configuration\n");
 		goto hw_params_exit;
 	}

 	errorCode = snd_soc_dai_set_fmt(cpu_dai,
 		i2s_mode | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
 	if (errorCode < 0) {
 		pr_err("can't set cpu DAI configuration\n");
 		goto hw_params_exit;
 	}

 	/* set the I2S system clock*/
 #ifdef DROPCAM_R2
 	errorCode = snd_soc_dai_set_sysclk(codec_dai, AK4642_SYSCLK, mclk, 0);
 #elif defined(CROWN_ROYAL)
 	errorCode = snd_soc_dai_set_sysclk(codec_dai, WM8974_SYSCLK, mclk, 0);
 #endif
 	if (errorCode < 0) {
 		pr_err("can't set cpu MCLK configuration\n");
 		goto hw_params_exit;
 	}

 	errorCode = snd_soc_dai_set_sysclk(cpu_dai, AMBARELLA_CLKSRC_ONCHIP, amb_mclk, 0);
 	if (errorCode < 0) {
 		pr_err("can't set cpu MCLK configuration\n");
 		goto hw_params_exit;
 	}

 	errorCode = snd_soc_dai_set_clkdiv(cpu_dai, AMBARELLA_CLKDIV_LRCLK, oversample);
 	if (errorCode < 0) {
 		pr_err("can't set cpu MCLK/SF ratio\n");
 		goto hw_params_exit;
 	}

 hw_params_exit:
 	return errorCode;
 }

 static struct snd_soc_ops a5sevk_board_ops = {
 	.startup = a5sevk_board_startup,
 	.hw_params = a5sevk_board_hw_params,
 };

 /* a5sevk machine dapm widgets */
 static const struct snd_soc_dapm_widget a5sevk_dapm_widgets[] = {
 #ifdef DROPCAM_R2
 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
 	SND_SOC_DAPM_LINE("Line In", NULL),
 	SND_SOC_DAPM_LINE("Line Out", NULL),
 	SND_SOC_DAPM_HP("HP Jack", NULL),
 	SND_SOC_DAPM_SPK("Speaker", NULL),
 #elif defined(CROWN_ROYAL)
 	SND_SOC_DAPM_MIC("Mic External", NULL),
 	SND_SOC_DAPM_SPK("Speaker", NULL),
 #endif
 };

 /* a5sevk machine audio map (connections to ak4642 pins) */
 static const struct snd_soc_dapm_route a5sevk_audio_map[] = {
 #ifdef DROPCAM_R2
 	/* Line In is connected to LLIN1, RLIN1 */
 	{"LIN1", NULL, "Mic Jack"},
 	{"RIN1", NULL, "Mic Jack"},
 	{"LIN2", NULL, "Line In"},
 	{"RIN2", NULL, "Line In"},

 	/* Line Out is connected to LLOUT, RLOUT */
 	{"Line Out", NULL, "LOUT"},
 	{"Line Out", NULL, "ROUT"},
 	{"HP Jack", NULL, "HPL"},
 	{"HP Jack", NULL, "HPR"},

 	/* Speaker is connected to SPP, SPN */
 	{"Speaker", NULL, "SPP"},
 	{"Speaker", NULL, "SPN"},
 #elif defined(CROWN_ROYAL)
   /*Mic External is connected to MICN , MICP, AUX*/
   {"MICN", NULL, "Mic External"},
   {"MICP", NULL, "Mic External"},
   {"AUX", NULL, "Mic External"},
   /* Speaker is connected to SPP, SPN */
   {"Speaker", NULL, "SPKOUTP"},
   {"Speaker", NULL, "SPKOUTN"},
   {"Speaker", NULL, "MONOOUT"},
 #endif
 };
 #ifdef DROPCAM_R2
 static int a5sevk_ak4642_init(struct snd_soc_pcm_runtime *rtd)
 {
 	int errorCode = 0;
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;

 	/* not connected */
 	/* snd_soc_dapm_nc_pin(dapm, "SPP"); */
 	/* snd_soc_dapm_nc_pin(dapm, "SPN"); */
 	snd_soc_dapm_nc_pin(dapm, "MIN");

 	/* Add a5sevk specific widgets */
 	errorCode = snd_soc_dapm_new_controls(dapm,
 		a5sevk_dapm_widgets,
 		ARRAY_SIZE(a5sevk_dapm_widgets));
 	if (errorCode) {
 		goto init_exit;
 	}

 	/* Set up a5sevk specific audio path a5sevk_audio_map */
 	errorCode = snd_soc_dapm_add_routes(dapm,
 		a5sevk_audio_map,
 		ARRAY_SIZE(a5sevk_audio_map));
 	if (errorCode) {
 		goto init_exit;
 	}

 	errorCode = snd_soc_dapm_sync(dapm);

 init_exit:
 	return errorCode;
 }
 #elif defined(CROWN_ROYAL)
 static int a5sevk_wm8974_init(struct snd_soc_pcm_runtime *rtd)
 {
 	int errorCode = 0;
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;

 	/* not connected */
 	//snd_soc_dapm_nc_pin(dapm, "MONOOUT");
 	//snd_soc_dapm_nc_pin(dapm, "AUX");

 	/* Add a5sevk specific widgets */
 	errorCode = snd_soc_dapm_new_controls(dapm,
 		a5sevk_dapm_widgets,
 		ARRAY_SIZE(a5sevk_dapm_widgets));
 	if (errorCode) {
 		goto init_exit;
 	}

 	/* Set up a5sevk specific audio path a5sevk_audio_map */
 	errorCode = snd_soc_dapm_add_routes(dapm,
 		a5sevk_audio_map,
 		ARRAY_SIZE(a5sevk_audio_map));
 	if (errorCode) {
 		goto init_exit;
 	}

 	errorCode = snd_soc_dapm_sync(dapm);

 init_exit:
 	return errorCode;
 }
 #endif


 /* a5sevk digital audio interface glue - connects codec <--> A2S */
 static struct snd_soc_dai_link a5sevk_dai_link = {
 #ifdef DROPCAM_R2
 	.name = "AK4642",
 	.stream_name = "AK4642-STREAM",
 #elif defined(CROWN_ROYAL)
 	.name = "WM8974",
 	.stream_name = "WM8974-STREAM",
 #endif
 	.cpu_dai_name = "ambarella-i2s.0",
 	.platform_name = "ambarella-pcm-audio",
 #ifdef DROPCAM_R2
 	.codec_dai_name = "ak4642-hifi",
 	.codec_name = "ak4642-codec.0-0012",
 	.init = a5sevk_ak4642_init,
 #elif defined(CROWN_ROYAL)
 	.codec_dai_name = "wm8974-hifi",
 	.codec_name = "wm8974-codec.0-001a",
 	.init = a5sevk_wm8974_init,
 #endif
 	.ops = &a5sevk_board_ops,
 };


 /* a5sevk audio machine driver */
 static struct snd_soc_card snd_soc_card_a5sevk = {
 	.name = "A5SEVK",
 	.dai_link = &a5sevk_dai_link,
 	.num_links = 1,
 };

 static struct platform_device *a5sevk_snd_device;

 static int __init a5sevk_board_init(void)
 {
 	int errorCode = 0;

 	a5sevk_snd_device = platform_device_alloc("soc-audio", -1);
 	if (!a5sevk_snd_device)
 		return -ENOMEM;

 	platform_set_drvdata(a5sevk_snd_device, &snd_soc_card_a5sevk);

 	errorCode = platform_device_add(a5sevk_snd_device);
 	if (errorCode) {
 		goto a5sevk_board_init_exit;
 	}

 	return 0;

 a5sevk_board_init_exit:
 	platform_device_put(a5sevk_snd_device);
 	return errorCode;
 }

 static void __exit a5sevk_board_exit(void)
 {
 	platform_device_unregister(a5sevk_snd_device);
 }

 module_init(a5sevk_board_init);
 module_exit(a5sevk_board_exit);

 MODULE_AUTHOR("Cao Rongrong <rrcao@ambarella.com>");
 #ifdef DROPCAM_R2
 MODULE_DESCRIPTION("Amabrella a5sevk Board with AK4642 Codec for ALSA");
 #elif defined(CROWN_ROYAL)
 MODULE_DESCRIPTION("Amabrella Board with WM8974 Codec for ALSA");
 #endif
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("snd-soc-coconut");
 MODULE_ALIAS("snd-soc-durian");
	/*
	* sound/soc/a5sevk.c
	*
	* Author: Cao Rongrong <rrcao@ambarella.com>
	*
	* History:
	* 2009/08/20 - [Cao Rongrong] Created file
	* 2011/03/20 - [Cao Rongrong] Port to 2.6.38,
	* merge coconut and durian into a5sevk
	*
	* Copyright (C) 2004-2009, Ambarella, Inc.
	*
	* 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.
	*
	* 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
	*
	*/

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

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

	#include <mach/hardware.h>
	#include <plat/audio.h>

	//#define DROPCAM_R2
	#define CROWN_ROYAL
	#ifdef DROPCAM_R2
	#include "../codecs/ak4642_amb.h"
	#elif defined(CROWN_ROYAL)
	#include "../codecs/wm8974_amb.h"
	#endif

	static unsigned int dai_fmt = 0;
	module_param(dai_fmt, uint, 0644);
	MODULE_PARM_DESC(dai_fmt, "DAI format.");

	static int a5sevk_board_startup(struct snd_pcm_substream *substream)
	{
	return 0;
	}

	static int a5sevk_board_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 errorCode = 0, amb_mclk, mclk, oversample, i2s_mode;

	switch (params_rate(params)) {
	case 8000:
	amb_mclk = AudioCodec_2_048M;
	mclk = 2048000;
	oversample = AudioCodec_256xfs;
	break;
	case 11025:
	amb_mclk = AudioCodec_2_8224M;
	mclk = 2822400;
	oversample = AudioCodec_256xfs;
	break;
	case 12000:
	amb_mclk = AudioCodec_3_072M;
	mclk = 3072000;
	oversample = AudioCodec_256xfs;
	break;
	case 16000:
	amb_mclk = AudioCodec_4_096M;
	mclk = 4096000;
	oversample = AudioCodec_256xfs;
	break;
	case 22050:
	amb_mclk = AudioCodec_5_6448M;
	mclk = 5644800;
	oversample = AudioCodec_256xfs;
	break;
	case 24000:
	amb_mclk = AudioCodec_6_144;
	mclk = 6144000;
	oversample = AudioCodec_256xfs;
	break;
	case 32000:
	amb_mclk = AudioCodec_8_192M;
	mclk = 8192000;
	oversample = AudioCodec_256xfs;
	break;
	case 44100:
	amb_mclk = AudioCodec_11_2896M;
	mclk = 11289600;
	oversample = AudioCodec_256xfs;
	break;
	case 48000:
	amb_mclk = AudioCodec_12_288M;
	mclk = 12288000;
	oversample = AudioCodec_256xfs;
	break;
	default:
	errorCode = -EINVAL;
	goto hw_params_exit;
	}

	if (dai_fmt == 0)
	i2s_mode = SND_SOC_DAIFMT_I2S;
	else
	i2s_mode = SND_SOC_DAIFMT_DSP_A;

	/* set the I2S system data format*/
	errorCode = snd_soc_dai_set_fmt(codec_dai,
	i2s_mode \| SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
	if (errorCode < 0) {
	pr_err("can't set codec DAI configuration\n");
	goto hw_params_exit;
	}

	errorCode = snd_soc_dai_set_fmt(cpu_dai,
	i2s_mode \| SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBS_CFS);
	if (errorCode < 0) {
	pr_err("can't set cpu DAI configuration\n");
	goto hw_params_exit;
	}

	/* set the I2S system clock*/
	#ifdef DROPCAM_R2
	errorCode = snd_soc_dai_set_sysclk(codec_dai, AK4642_SYSCLK, mclk, 0);
	#elif defined(CROWN_ROYAL)
	errorCode = snd_soc_dai_set_sysclk(codec_dai, WM8974_SYSCLK, mclk, 0);
	#endif
	if (errorCode < 0) {
	pr_err("can't set cpu MCLK configuration\n");
	goto hw_params_exit;
	}

	errorCode = snd_soc_dai_set_sysclk(cpu_dai, AMBARELLA_CLKSRC_ONCHIP, amb_mclk, 0);
	if (errorCode < 0) {
	pr_err("can't set cpu MCLK configuration\n");
	goto hw_params_exit;
	}

	errorCode = snd_soc_dai_set_clkdiv(cpu_dai, AMBARELLA_CLKDIV_LRCLK, oversample);
	if (errorCode < 0) {
	pr_err("can't set cpu MCLK/SF ratio\n");
	goto hw_params_exit;
	}

	hw_params_exit:
	return errorCode;
	}

	static struct snd_soc_ops a5sevk_board_ops = {
	.startup = a5sevk_board_startup,
	.hw_params = a5sevk_board_hw_params,
	};

	/* a5sevk machine dapm widgets */
	static const struct snd_soc_dapm_widget a5sevk_dapm_widgets[] = {
	#ifdef DROPCAM_R2
	SND_SOC_DAPM_MIC("Mic Jack", NULL),
	SND_SOC_DAPM_LINE("Line In", NULL),
	SND_SOC_DAPM_LINE("Line Out", NULL),
	SND_SOC_DAPM_HP("HP Jack", NULL),
	SND_SOC_DAPM_SPK("Speaker", NULL),
	#elif defined(CROWN_ROYAL)
	SND_SOC_DAPM_MIC("Mic External", NULL),
	SND_SOC_DAPM_SPK("Speaker", NULL),
	#endif
	};

	/* a5sevk machine audio map (connections to ak4642 pins) */
	static const struct snd_soc_dapm_route a5sevk_audio_map[] = {
	#ifdef DROPCAM_R2
	/* Line In is connected to LLIN1, RLIN1 */
	{"LIN1", NULL, "Mic Jack"},
	{"RIN1", NULL, "Mic Jack"},
	{"LIN2", NULL, "Line In"},
	{"RIN2", NULL, "Line In"},

	/* Line Out is connected to LLOUT, RLOUT */
	{"Line Out", NULL, "LOUT"},
	{"Line Out", NULL, "ROUT"},
	{"HP Jack", NULL, "HPL"},
	{"HP Jack", NULL, "HPR"},

	/* Speaker is connected to SPP, SPN */
	{"Speaker", NULL, "SPP"},
	{"Speaker", NULL, "SPN"},
	#elif defined(CROWN_ROYAL)
	/Mic External is connected to MICN , MICP, AUX/
	{"MICN", NULL, "Mic External"},
	{"MICP", NULL, "Mic External"},
	{"AUX", NULL, "Mic External"},
	/* Speaker is connected to SPP, SPN */
	{"Speaker", NULL, "SPKOUTP"},
	{"Speaker", NULL, "SPKOUTN"},
	{"Speaker", NULL, "MONOOUT"},
	#endif
	};
	#ifdef DROPCAM_R2
	static int a5sevk_ak4642_init(struct snd_soc_pcm_runtime *rtd)
	{
	int errorCode = 0;
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	/* not connected */
	/* snd_soc_dapm_nc_pin(dapm, "SPP"); */
	/* snd_soc_dapm_nc_pin(dapm, "SPN"); */
	snd_soc_dapm_nc_pin(dapm, "MIN");

	/* Add a5sevk specific widgets */
	errorCode = snd_soc_dapm_new_controls(dapm,
	a5sevk_dapm_widgets,
	ARRAY_SIZE(a5sevk_dapm_widgets));
	if (errorCode) {
	goto init_exit;
	}

	/* Set up a5sevk specific audio path a5sevk_audio_map */
	errorCode = snd_soc_dapm_add_routes(dapm,
	a5sevk_audio_map,
	ARRAY_SIZE(a5sevk_audio_map));
	if (errorCode) {
	goto init_exit;
	}

	errorCode = snd_soc_dapm_sync(dapm);

	init_exit:
	return errorCode;
	}
	#elif defined(CROWN_ROYAL)
	static int a5sevk_wm8974_init(struct snd_soc_pcm_runtime *rtd)
	{
	int errorCode = 0;
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	/* not connected */
	//snd_soc_dapm_nc_pin(dapm, "MONOOUT");
	//snd_soc_dapm_nc_pin(dapm, "AUX");

	/* Add a5sevk specific widgets */
	errorCode = snd_soc_dapm_new_controls(dapm,
	a5sevk_dapm_widgets,
	ARRAY_SIZE(a5sevk_dapm_widgets));
	if (errorCode) {
	goto init_exit;
	}

	/* Set up a5sevk specific audio path a5sevk_audio_map */
	errorCode = snd_soc_dapm_add_routes(dapm,
	a5sevk_audio_map,
	ARRAY_SIZE(a5sevk_audio_map));
	if (errorCode) {
	goto init_exit;
	}

	errorCode = snd_soc_dapm_sync(dapm);

	init_exit:
	return errorCode;
	}
	#endif


	/* a5sevk digital audio interface glue - connects codec <--> A2S */
	static struct snd_soc_dai_link a5sevk_dai_link = {
	#ifdef DROPCAM_R2
	.name = "AK4642",
	.stream_name = "AK4642-STREAM",
	#elif defined(CROWN_ROYAL)
	.name = "WM8974",
	.stream_name = "WM8974-STREAM",
	#endif
	.cpu_dai_name = "ambarella-i2s.0",
	.platform_name = "ambarella-pcm-audio",
	#ifdef DROPCAM_R2
	.codec_dai_name = "ak4642-hifi",
	.codec_name = "ak4642-codec.0-0012",
	.init = a5sevk_ak4642_init,
	#elif defined(CROWN_ROYAL)
	.codec_dai_name = "wm8974-hifi",
	.codec_name = "wm8974-codec.0-001a",
	.init = a5sevk_wm8974_init,
	#endif
	.ops = &a5sevk_board_ops,
	};


	/* a5sevk audio machine driver */
	static struct snd_soc_card snd_soc_card_a5sevk = {
	.name = "A5SEVK",
	.dai_link = &a5sevk_dai_link,
	.num_links = 1,
	};

	static struct platform_device *a5sevk_snd_device;

	static int __init a5sevk_board_init(void)
	{
	int errorCode = 0;

	a5sevk_snd_device = platform_device_alloc("soc-audio", -1);
	if (!a5sevk_snd_device)
	return -ENOMEM;

	platform_set_drvdata(a5sevk_snd_device, &snd_soc_card_a5sevk);

	errorCode = platform_device_add(a5sevk_snd_device);
	if (errorCode) {
	goto a5sevk_board_init_exit;
	}

	return 0;

	a5sevk_board_init_exit:
	platform_device_put(a5sevk_snd_device);
	return errorCode;
	}

	static void __exit a5sevk_board_exit(void)
	{
	platform_device_unregister(a5sevk_snd_device);
	}

	module_init(a5sevk_board_init);
	module_exit(a5sevk_board_exit);

	MODULE_AUTHOR("Cao Rongrong <rrcao@ambarella.com>");
	#ifdef DROPCAM_R2
	MODULE_DESCRIPTION("Amabrella a5sevk Board with AK4642 Codec for ALSA");
	#elif defined(CROWN_ROYAL)
	MODULE_DESCRIPTION("Amabrella Board with WM8974 Codec for ALSA");
	#endif
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("snd-soc-coconut");
	MODULE_ALIAS("snd-soc-durian");