[tegra ALSA] separated codec and control code

- separated codec and control code
- codec specific code is added to tegra_soc_xxx
- alsa controls code added to tegra_soc_controls

Fixes bug 759167

Change-Id: Ib8cd19364b3d4a0cb726d20b4eb1a7fab4017bf1
Reviewed-on: http://git-master/r/15637
Tested-by: Ravindra Lokhande <rlokhande@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Reviewed-by: Scott Peterson <speterson@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

4 files changed, 271 insertions, 245 deletions

diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index b1bc3d02109c..afd353f62f9e 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -1,6 +1,7 @@
-ccflags-y += -DNV_DEBUG=0
-obj-$(CONFIG_TEGRA_PCM) += tegra_pcm.o
-obj-$(CONFIG_TEGRA_I2S) += tegra_i2s.o
-obj-$(CONFIG_TEGRA_ALSA) += tegra_soc.o
+ccflags-y                       += -DNV_DEBUG=0
+obj-$(CONFIG_TEGRA_PCM)         += tegra_pcm.o
+obj-$(CONFIG_TEGRA_I2S)         += tegra_i2s.o
+obj-$(CONFIG_TEGRA_ALSA)        += tegra_soc_controls.o
+obj-${CONFIG_SND_SOC_WM8903}    += tegra_soc_wm8903.o
 
 
diff --git a/sound/soc/tegra/tegra_soc.h b/sound/soc/tegra/tegra_soc.h
index 5aeedc9fd0d4..c9ef76acebc0 100644
--- a/sound/soc/tegra/tegra_soc.h
+++ b/sound/soc/tegra/tegra_soc.h
@@ -106,4 +106,7 @@ struct tegra_audio_data {
 	bool is_call_mode;
 };
 
+int tegra_controls_init(struct snd_soc_codec *codec);
+void tegra_controls_exit(void);
+
 #endif
diff --git a/sound/soc/tegra/tegra_soc.c b/sound/soc/tegra/tegra_soc_controls.c
index afb3d1c761a2..a090740a3f7d 100644
--- a/sound/soc/tegra/tegra_soc.c
+++ b/sound/soc/tegra/tegra_soc_controls.c
@@ -1,25 +1,27 @@
 /*
- * tegra_soc.c  --  SoC audio for tegra
+ * tegra_soc_controls.c -- alsa controls for tegra SoC
  *
- * (c) 2010 Nvidia Graphics Pvt. Ltd.
- *  http://www.nvidia.com
+ * Copyright (c) 2010, NVIDIA Corporation.
  *
- * Copyright 2007 Wolfson Microelectronics PLC.
- * Author: Graeme Gregory
- *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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.
  *
- *  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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
+
 #include "tegra_soc.h"
 #include <mach/audio.h>
-#include "../codecs/wm8903.h"
 
-static struct platform_device *tegra_snd_device;
 static struct tegra_audio_data *audio_data;
 static int tegra_jack_func;
 static int tegra_spk_func;
@@ -32,38 +34,6 @@ static int tegra_spk_func;
 #define TEGRA_SPK_ON	0
 #define TEGRA_SPK_OFF	1
 
-/* codec register values */
-#define B07_INEMUTE		7
-#define B06_VOL_M3DB		6
-#define B00_IN_VOL		0
-#define B00_INR_ENA		0
-#define B01_INL_ENA		1
-#define R06_MICBIAS_CTRL_0	6
-#define B07_MICDET_HYST_ENA	7
-#define B04_MICDET_THR		4
-#define B02_MICSHORT_THR	2
-#define B01_MICDET_ENA		1
-#define B00_MICBIAS_ENA		0
-#define B15_DRC_ENA		15
-#define B03_DACL_ENA		3
-#define B02_DACR_ENA		2
-#define B01_ADCL_ENA		1
-#define B00_ADCR_ENA		0
-#define B06_IN_CM_ENA		6
-#define B04_IP_SEL_N		4
-#define B02_IP_SEL_P		2
-#define B00_MODE 		0
-#define B06_AIF_ADCL		7
-#define B06_AIF_ADCR		6
-#define B05_ADC_HPF_CUT		5
-#define B04_ADC_HPF_ENA		4
-#define B01_ADCL_DATINV		1
-#define B00_ADCR_DATINV		0
-#define R20_SIDETONE_CTRL	32
-#define R29_DRC_1		41
-#define SET_REG_VAL(r,m,l,v) (((r)&(~((m)<<(l))))|(((v)&(m))<<(l)))
-
-
 static void tegra_ext_control(struct snd_soc_codec *codec)
 {
 	/* set up jack connection */
@@ -105,109 +75,6 @@ static void tegra_ext_control(struct snd_soc_codec *codec)
 	snd_soc_dapm_sync(codec);
 }
 
-static int tegra_hifi_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;
-	int err;
-	struct snd_soc_codec *codec = codec_dai->codec;
-	int CtrlReg = 0;
-	int VolumeCtrlReg = 0;
-	int SidetoneCtrlReg = 0;
-	int SideToneAtenuation = 0;
-
-	err = snd_soc_dai_set_fmt(codec_dai,
-					SND_SOC_DAIFMT_I2S | \
-					SND_SOC_DAIFMT_NB_NF | \
-					SND_SOC_DAIFMT_CBS_CFS);
-	if (err < 0) {
-		printk(KERN_ERR "codec_dai fmt not set \n");
-		return err;
-	}
-
-	err = snd_soc_dai_set_fmt(cpu_dai,
-					SND_SOC_DAIFMT_I2S | \
-					SND_SOC_DAIFMT_NB_NF | \
-					SND_SOC_DAIFMT_CBS_CFS);
-	if (err < 0) {
-		printk(KERN_ERR "cpu_dai fmt not set \n");
-		return err;
-	}
-	err = snd_soc_dai_set_sysclk(codec_dai, 0, I2S_CLK, SND_SOC_CLOCK_IN);
-
-	if (err<0) {
-		printk(KERN_ERR "codec_dai clock not set\n");
-		return err;
-	}
-	err = snd_soc_dai_set_sysclk(cpu_dai, 0, I2S_CLK, SND_SOC_CLOCK_IN);
-
-	if (err<0) {
-		printk(KERN_ERR "cpu_dai clock not set\n");
-		return err;
-	}
-
-	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) {
-		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_0, 0X7);
-		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_0, 0X7);
-		// Mic Bias enable
-		CtrlReg = (0x1<<B00_MICBIAS_ENA) | (0x1<<B01_MICDET_ENA);
-		snd_soc_write(codec, WM8903_MIC_BIAS_CONTROL_0, CtrlReg);
-		// Enable DRC
-		CtrlReg = snd_soc_read(codec, WM8903_DRC_0);
-		CtrlReg |= (1<<B15_DRC_ENA);
-		snd_soc_write(codec, WM8903_DRC_0, CtrlReg);
-		// Single Ended Mic
-		CtrlReg = (0x0<<B06_IN_CM_ENA) |
-			(0x0<<B00_MODE) | (0x0<<B04_IP_SEL_N)
-					| (0x1<<B02_IP_SEL_P);
-		VolumeCtrlReg = (0x5 << B00_IN_VOL);
-		// Mic Setting
-		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_1, CtrlReg);
-		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_1, CtrlReg);
-		// voulme for single ended mic
-		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_0,
-				VolumeCtrlReg);
-		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_0,
-				VolumeCtrlReg);
-		// replicate mic setting on both channels
-		CtrlReg = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_0);
-		CtrlReg  = SET_REG_VAL(CtrlReg, 0x1, B06_AIF_ADCR, 0x0);
-		CtrlReg  = SET_REG_VAL(CtrlReg, 0x1, B06_AIF_ADCL, 0x0);
-		snd_soc_write(codec, WM8903_AUDIO_INTERFACE_0, CtrlReg);
-		// Enable analog inputs
-		CtrlReg = (0x1<<B01_INL_ENA) | (0x1<<B00_INR_ENA);
-		snd_soc_write(codec, WM8903_POWER_MANAGEMENT_0, CtrlReg);
-		// ADC Settings
-		CtrlReg = snd_soc_read(codec, WM8903_ADC_DIGITAL_0);
-		CtrlReg |= (0x1<<B04_ADC_HPF_ENA);
-		snd_soc_write(codec, WM8903_ADC_DIGITAL_0, CtrlReg);
-		SidetoneCtrlReg = 0;
-		snd_soc_write(codec, R20_SIDETONE_CTRL, SidetoneCtrlReg);
-		// Enable ADC
-		CtrlReg = snd_soc_read(codec, WM8903_POWER_MANAGEMENT_6);
-		CtrlReg |= (0x1<<B00_ADCR_ENA)|(0x1<<B01_ADCL_ENA);
-		snd_soc_write(codec, WM8903_POWER_MANAGEMENT_6, CtrlReg);
-		// Enable Sidetone
-		SidetoneCtrlReg = (0x1<<2) | (0x2<<0);
-		SideToneAtenuation = 12 ; // sidetone 0 db
-		SidetoneCtrlReg |= (SideToneAtenuation<<8)
-				| (SideToneAtenuation<<4);
-		snd_soc_write(codec, R20_SIDETONE_CTRL, SidetoneCtrlReg);
-		CtrlReg = snd_soc_read(codec, R29_DRC_1);
-		CtrlReg |= 0x3; //mic volume 18 db
-		snd_soc_write(codec, R29_DRC_1, CtrlReg);
-	}
-
-	return 0;
-}
-
-static struct snd_soc_ops tegra_hifi_ops = {
-	.hw_params = tegra_hifi_hw_params,
-};
-
-
 static int tegra_get_jack(struct snd_kcontrol *kcontrol,
 				struct snd_ctl_elem_value *ucontrol)
 {
@@ -250,7 +117,7 @@ static int tegra_set_spk(struct snd_kcontrol *kcontrol,
 }
 
 /*tegra machine dapm widgets */
-static const struct snd_soc_dapm_widget wm8903_dapm_widgets[] = {
+static const struct snd_soc_dapm_widget tegra_dapm_widgets[] = {
 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
@@ -286,7 +153,7 @@ static const struct soc_enum tegra_enum[] = {
 	SOC_ENUM_SINGLE_EXT(2, spk_function),
 };
 
-static const struct snd_kcontrol_new wm8903_tegra_controls[] = {
+static const struct snd_kcontrol_new tegra_controls[] = {
 	SOC_ENUM_EXT("Jack Function", tegra_enum[0], tegra_get_jack,
 			tegra_set_jack),
 	SOC_ENUM_EXT("Speaker Function", tegra_enum[1], tegra_get_spk,
@@ -408,8 +275,7 @@ static int tegra_play_route_put(struct snd_kcontrol *kcontrol,
 	return -EINVAL;
 }
 
-struct snd_kcontrol_new tegra_play_route_control =
-{
+struct snd_kcontrol_new tegra_play_route_control = {
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Pcm Playback Route",
@@ -458,8 +324,7 @@ static int tegra_capture_route_put(struct snd_kcontrol *kcontrol,
 	return -EINVAL;
 }
 
-struct snd_kcontrol_new tegra_capture_route_control =
-{
+struct snd_kcontrol_new tegra_capture_route_control = {
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Pcm Capture Route",
@@ -508,8 +373,7 @@ static int tegra_call_mode_put(struct snd_kcontrol *kcontrol,
 	return -EINVAL;
 }
 
-struct snd_kcontrol_new tegra_call_mode_control =
-{
+struct snd_kcontrol_new tegra_call_mode_control = {
 	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	.name = "Call Mode Switch",
@@ -519,19 +383,25 @@ struct snd_kcontrol_new tegra_call_mode_control =
 	.put = tegra_call_mode_put
 };
 
-static int tegra_codec_init(struct snd_soc_codec *codec)
+int tegra_controls_init(struct snd_soc_codec *codec)
 {
 	int err;
 
+	audio_data = kzalloc(sizeof(*audio_data), GFP_KERNEL);
+	if (!audio_data) {
+		pr_err("failed to allocate tegra_audio_data \n");
+		return -ENOMEM;
+	}
+
 	/* Add tegra specific controls */
-	err = snd_soc_add_controls(codec, wm8903_tegra_controls,
-					ARRAY_SIZE(wm8903_tegra_controls));
+	err = snd_soc_add_controls(codec, tegra_controls,
+					ARRAY_SIZE(tegra_controls));
 	if (err < 0)
-		return err;
+		goto fail;
 
 	/* Add tegra specific widgets */
-	snd_soc_dapm_new_controls(codec, wm8903_dapm_widgets,
-					ARRAY_SIZE(wm8903_dapm_widgets));
+	snd_soc_dapm_new_controls(codec, tegra_dapm_widgets,
+					ARRAY_SIZE(tegra_dapm_widgets));
 
 	/* Set up tegra specific audio path audio_map */
 	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
@@ -541,19 +411,19 @@ static int tegra_codec_init(struct snd_soc_codec *codec)
 	err = snd_ctl_add(codec->card,
 			snd_ctl_new1(&tegra_play_route_control, NULL));
 	if (err < 0)
-		return err;
+		goto fail;
 
 	/* Add capture route control */
 	err = snd_ctl_add(codec->card,
 			snd_ctl_new1(&tegra_capture_route_control, NULL));
 	if (err < 0)
-		return err;
+		goto fail;
 
 	/* Add call mode switch control */
 	err = snd_ctl_add(codec->card,
 			snd_ctl_new1(&tegra_call_mode_control, NULL));
 	if (err < 0)
-		return err;
+		goto fail;
 
 	/* Default to HP output */
 	tegra_jack_func = TEGRA_HP;
@@ -563,93 +433,18 @@ static int tegra_codec_init(struct snd_soc_codec *codec)
 	snd_soc_dapm_sync(codec);
 
 	return 0;
-}
-
-extern struct snd_soc_dai tegra_i2s_dai;
-extern struct snd_soc_platform tegra_soc_platform;
-
-static struct snd_soc_dai_link tegra_soc_dai = {
-	.name = "WM8903",
-	.stream_name = "WM8903 HiFi",
-	.cpu_dai = &tegra_i2s_dai,
-	.codec_dai = &wm8903_dai,
-	.init = tegra_codec_init,
-	.ops = &tegra_hifi_ops,
-};
-
-static struct snd_soc_card tegra_snd_soc = {
-	.name = "tegra",
-	.platform = &tegra_soc_platform,
-	.dai_link = &tegra_soc_dai,
-	.num_links = 1,
-};
-
-struct tegra_setup_data {
-	int i2c_bus;
-	unsigned short i2c_address;
-};
-
-static struct snd_soc_device tegra_snd_devdata = {
-	.card = &tegra_snd_soc,
-	.codec_dev = &soc_codec_dev_wm8903,
-};
-
-static int __init tegra_init(void)
-{
-	int ret = 0;
-	struct tegra_setup_data tegra_setup;
-
-	tegra_snd_device = platform_device_alloc("soc-audio", -1);
-	if (!tegra_snd_device) {
-		pr_err("failed to allocate soc-audio \n");
-		ret = -ENOMEM;
-		goto fail;
-	}
-
-	audio_data = kzalloc(sizeof(*audio_data), GFP_KERNEL);
-	if (!audio_data) {
-		pr_err("failed to allocate tegra_audio_data \n");
-		ret = -ENOMEM;
-		goto fail;
-	}
-
-	memset(&tegra_setup,0,sizeof(struct tegra_setup_data));
-	platform_set_drvdata(tegra_snd_device, &tegra_snd_devdata);
-	tegra_snd_devdata.dev = &tegra_snd_device->dev;
-	ret = platform_device_add(tegra_snd_device);
-	if (ret) {
-		pr_err("audio device could not be added \n");
-		goto fail;
-	}
-
-	return 0;
-
 fail:
 	if (audio_data) {
 		kfree(audio_data);
 		audio_data = 0;
 	}
-
-	if (tegra_snd_device) {
-		platform_device_put(tegra_snd_device);
-		tegra_snd_device = 0;
-	}
-
-	return ret;
+	return err;
 }
 
-static void __exit tegra_exit(void)
+void tegra_controls_exit(void)
 {
 	if (audio_data) {
 		kfree(audio_data);
 		audio_data = 0;
 	}
-	platform_device_unregister(tegra_snd_device);
 }
-
-module_init(tegra_init);
-module_exit(tegra_exit);
-
-/* Module information */
-MODULE_DESCRIPTION("Tegra ALSA SoC");
-MODULE_LICENSE("GPL");
diff --git a/sound/soc/tegra/tegra_soc_wm8903.c b/sound/soc/tegra/tegra_soc_wm8903.c
new file mode 100644
index 000000000000..80d85f985fdf
--- /dev/null
+++ b/sound/soc/tegra/tegra_soc_wm8903.c
@@ -0,0 +1,227 @@
+/*
+ * tegra_soc_wm8903.c  --  SoC audio for tegra
+ *
+ * (c) 2010 Nvidia Graphics Pvt. Ltd.
+ *  http://www.nvidia.com
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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 "tegra_soc.h"
+#include "../codecs/wm8903.h"
+
+static struct platform_device *tegra_snd_device;
+
+extern struct snd_soc_dai tegra_i2s_dai;
+extern struct snd_soc_platform tegra_soc_platform;
+
+/* codec register values */
+#define B07_INEMUTE		7
+#define B06_VOL_M3DB		6
+#define B00_IN_VOL		0
+#define B00_INR_ENA		0
+#define B01_INL_ENA		1
+#define R06_MICBIAS_CTRL_0	6
+#define B07_MICDET_HYST_ENA	7
+#define B04_MICDET_THR		4
+#define B02_MICSHORT_THR	2
+#define B01_MICDET_ENA		1
+#define B00_MICBIAS_ENA		0
+#define B15_DRC_ENA		15
+#define B03_DACL_ENA		3
+#define B02_DACR_ENA		2
+#define B01_ADCL_ENA		1
+#define B00_ADCR_ENA		0
+#define B06_IN_CM_ENA		6
+#define B04_IP_SEL_N		4
+#define B02_IP_SEL_P		2
+#define B00_MODE 		0
+#define B06_AIF_ADCL		7
+#define B06_AIF_ADCR		6
+#define B05_ADC_HPF_CUT		5
+#define B04_ADC_HPF_ENA		4
+#define B01_ADCL_DATINV		1
+#define B00_ADCR_DATINV		0
+#define R20_SIDETONE_CTRL	32
+#define R29_DRC_1		41
+#define SET_REG_VAL(r,m,l,v) (((r)&(~((m)<<(l))))|(((v)&(m))<<(l)))
+
+
+static int tegra_hifi_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;
+	int err;
+	struct snd_soc_codec *codec = codec_dai->codec;
+	int CtrlReg = 0;
+	int VolumeCtrlReg = 0;
+	int SidetoneCtrlReg = 0;
+	int SideToneAtenuation = 0;
+
+	err = snd_soc_dai_set_fmt(codec_dai,
+					SND_SOC_DAIFMT_I2S | \
+					SND_SOC_DAIFMT_NB_NF | \
+					SND_SOC_DAIFMT_CBS_CFS);
+	if (err < 0) {
+		printk(KERN_ERR "codec_dai fmt not set \n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_fmt(cpu_dai,
+					SND_SOC_DAIFMT_I2S | \
+					SND_SOC_DAIFMT_NB_NF | \
+					SND_SOC_DAIFMT_CBS_CFS);
+	if (err < 0) {
+		printk(KERN_ERR "cpu_dai fmt not set \n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_sysclk(codec_dai, 0, I2S_CLK, SND_SOC_CLOCK_IN);
+	if (err < 0) {
+		printk(KERN_ERR "codec_dai clock not set\n");
+		return err;
+	}
+
+	err = snd_soc_dai_set_sysclk(cpu_dai, 0, I2S_CLK, SND_SOC_CLOCK_IN);
+	if (err < 0) {
+		printk(KERN_ERR "cpu_dai clock not set\n");
+		return err;
+	}
+
+	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK) {
+		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_0, 0X7);
+		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_0, 0X7);
+		// Mic Bias enable
+		CtrlReg = (0x1<<B00_MICBIAS_ENA) | (0x1<<B01_MICDET_ENA);
+		snd_soc_write(codec, WM8903_MIC_BIAS_CONTROL_0, CtrlReg);
+		// Enable DRC
+		CtrlReg = snd_soc_read(codec, WM8903_DRC_0);
+		CtrlReg |= (1<<B15_DRC_ENA);
+		snd_soc_write(codec, WM8903_DRC_0, CtrlReg);
+		// Single Ended Mic
+		CtrlReg = (0x0<<B06_IN_CM_ENA) |
+			(0x0<<B00_MODE) | (0x0<<B04_IP_SEL_N)
+					| (0x1<<B02_IP_SEL_P);
+		VolumeCtrlReg = (0x5 << B00_IN_VOL);
+		// Mic Setting
+		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_1, CtrlReg);
+		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_1, CtrlReg);
+		// voulme for single ended mic
+		snd_soc_write(codec, WM8903_ANALOGUE_LEFT_INPUT_0,
+				VolumeCtrlReg);
+		snd_soc_write(codec, WM8903_ANALOGUE_RIGHT_INPUT_0,
+				VolumeCtrlReg);
+		// replicate mic setting on both channels
+		CtrlReg = snd_soc_read(codec, WM8903_AUDIO_INTERFACE_0);
+		CtrlReg  = SET_REG_VAL(CtrlReg, 0x1, B06_AIF_ADCR, 0x0);
+		CtrlReg  = SET_REG_VAL(CtrlReg, 0x1, B06_AIF_ADCL, 0x0);
+		snd_soc_write(codec, WM8903_AUDIO_INTERFACE_0, CtrlReg);
+		// Enable analog inputs
+		CtrlReg = (0x1<<B01_INL_ENA) | (0x1<<B00_INR_ENA);
+		snd_soc_write(codec, WM8903_POWER_MANAGEMENT_0, CtrlReg);
+		// ADC Settings
+		CtrlReg = snd_soc_read(codec, WM8903_ADC_DIGITAL_0);
+		CtrlReg |= (0x1<<B04_ADC_HPF_ENA);
+		snd_soc_write(codec, WM8903_ADC_DIGITAL_0, CtrlReg);
+		SidetoneCtrlReg = 0;
+		snd_soc_write(codec, R20_SIDETONE_CTRL, SidetoneCtrlReg);
+		// Enable ADC
+		CtrlReg = snd_soc_read(codec, WM8903_POWER_MANAGEMENT_6);
+		CtrlReg |= (0x1<<B00_ADCR_ENA)|(0x1<<B01_ADCL_ENA);
+		snd_soc_write(codec, WM8903_POWER_MANAGEMENT_6, CtrlReg);
+		// Enable Sidetone
+		SidetoneCtrlReg = (0x1<<2) | (0x2<<0);
+		SideToneAtenuation = 12 ; // sidetone 0 db
+		SidetoneCtrlReg |= (SideToneAtenuation<<8)
+				| (SideToneAtenuation<<4);
+		snd_soc_write(codec, R20_SIDETONE_CTRL, SidetoneCtrlReg);
+		CtrlReg = snd_soc_read(codec, R29_DRC_1);
+		CtrlReg |= 0x3; //mic volume 18 db
+		snd_soc_write(codec, R29_DRC_1, CtrlReg);
+	}
+
+	return 0;
+}
+
+static struct snd_soc_ops tegra_hifi_ops = {
+	.hw_params = tegra_hifi_hw_params,
+};
+
+static int tegra_codec_init(struct snd_soc_codec *codec)
+{
+	return tegra_controls_init(codec);
+}
+
+
+static struct snd_soc_dai_link tegra_soc_dai = {
+	.name = "WM8903",
+	.stream_name = "WM8903 HiFi",
+	.cpu_dai = &tegra_i2s_dai,
+	.codec_dai = &wm8903_dai,
+	.init = tegra_codec_init,
+	.ops = &tegra_hifi_ops,
+};
+
+static struct snd_soc_card tegra_snd_soc = {
+	.name = "tegra",
+	.platform = &tegra_soc_platform,
+	.dai_link = &tegra_soc_dai,
+	.num_links = 1,
+};
+
+static struct snd_soc_device tegra_snd_devdata = {
+	.card = &tegra_snd_soc,
+	.codec_dev = &soc_codec_dev_wm8903,
+};
+
+static int __init tegra_init(void)
+{
+	int ret = 0;
+
+	tegra_snd_device = platform_device_alloc("soc-audio", -1);
+	if (!tegra_snd_device) {
+		pr_err("failed to allocate soc-audio \n");
+		return ENOMEM;
+	}
+
+	platform_set_drvdata(tegra_snd_device, &tegra_snd_devdata);
+	tegra_snd_devdata.dev = &tegra_snd_device->dev;
+	ret = platform_device_add(tegra_snd_device);
+	if (ret) {
+		pr_err("audio device could not be added \n");
+		goto fail;
+	}
+
+	return 0;
+
+fail:
+	if (tegra_snd_device) {
+		platform_device_put(tegra_snd_device);
+		tegra_snd_device = 0;
+	}
+
+	return ret;
+}
+
+static void __exit tegra_exit(void)
+{
+	tegra_controls_exit();
+	platform_device_unregister(tegra_snd_device);
+}
+
+module_init(tegra_init);
+module_exit(tegra_exit);
+
+/* Module information */
+MODULE_DESCRIPTION("Tegra ALSA SoC");
+MODULE_LICENSE("GPL");