ENGR00107731-2: Port imx 3.3.0 release to 2.6.28

Port rel_imx_2.6.26_3.3.0 to 2.6.28.
PMIC Regulator and ASoC drivers are removed and not yet ported.
Updated asm/arch headers for move to plat-mxc/include/mach
device_create parameters changed.
sysdev attribute functions changed.
Adopt mainline MX3 timer code and update clock init flow.

Signed-off-by: Rob Herring <r.herring@freescale.com>

7 files changed, 6705 insertions, 0 deletions

diff --git a/sound/arm/Kconfig b/sound/arm/Kconfig
index f8e6de48d816..25b346110e49 100644
--- a/sound/arm/Kconfig
+++ b/sound/arm/Kconfig
@@ -50,5 +50,54 @@ config SND_PXA2XX_AC97
 	  Say Y or M if you want to support any AC97 codec attached to
 	  the PXA2xx AC97 interface.
 
+config SND_MXC_SPDIF
+        tristate "MXC SPDIF sound card spport"
+        select SND_PCM
+        help
+          Say Y here to enable SPDIF sound card
+
+config SND_MXC_PMIC
+	tristate "MXC PMIC sound system"
+	depends on ARCH_MXC && MXC_DAM && MXC_SSI && \
+		(MXC_MC13783_AUDIO || MXC_PMIC_SC55112_AUDIO)
+	default y
+	select SND_PCM
+	help
+	  Say Y here to include support for soundcards based on the
+	  MC13783 chip.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-mc13783.
+
+config  SND_MXC_PLAYBACK_MIXING
+        bool "Playback Stream Mixing"
+        depends on (!ARCH_MX27) && (!ARCH_MXC91131) && ARCH_MXC && MXC_DAM && MXC_SSI && \
+                (MXC_MC13783_AUDIO)
+        default n
+        select SND_PCM
+        help
+          Say Y here to include support mixing for soundcards based on the
+          MC13783 chip. This supports audio stream mixing on VCODEC for mc13783 based platforms.
+	  Analog mixng as well as Digital mixing can be tested on these platforms.
+	  As of now , mixing of mono files only are supported in Digital Mixing since it is done on VCODEC.
+	  SSI 2 channel mode is used to mix 2 streams on a single SSI.  This is supported on all platforms except imx27ads(imx27ads - Analog mixing only).
+
+config HEADSET_DETECT_ENABLE
+        bool "Headset Detect Enable"
+        depends on (!ARCH_MXC91131) && ARCH_MXC && MXC_DAM && MXC_SSI && \
+                (MXC_MC13783_AUDIO)
+        default n
+        select SND_PCM
+        help
+        Say Y here to enable Headset Detect Feature.
+
+config SND_MXC_PMIC_IRAM
+        bool "MXC PMIC sound system supports IRAM"
+        depends on SND_MXC_PMIC && SDMA_IRAM
+        default n
+        select SND_PCM
+        help
+          It will use IRAM as the DMA buffer of ALSA playback.
+
 endif	# SND_ARM
 
diff --git a/sound/arm/Makefile b/sound/arm/Makefile
index 2054de11de8a..307e2db108db 100644
--- a/sound/arm/Makefile
+++ b/sound/arm/Makefile
@@ -17,3 +17,14 @@ snd-pxa2xx-lib-$(CONFIG_SND_PXA2XX_LIB_AC97)	+= pxa2xx-ac97-lib.o
 
 obj-$(CONFIG_SND_PXA2XX_AC97)	+= snd-pxa2xx-ac97.o
 snd-pxa2xx-ac97-objs		:= pxa2xx-ac97.o
+
+#
+# Define the header file locations for PMIC drivers.
+#
+CFLAGS_mxc-alsa-pmic.o  = -I$(TOPDIR)/drivers/mxc
+obj-$(CONFIG_SND_MXC_PMIC)	+= snd-mxc-alsa.o
+snd-mxc-alsa-objs		:= mxc-alsa-pmic.o mxc-alsa-mixer.o
+
+CFLGS_mxc_alsa_spdif.o = -I$(TOPDIR)/drivers/mxc
+obj-$(CONFIG_SND_MXC_SPDIF)    += snd-spdif.o
+snd-spdif-objs                 := mxc-alsa-spdif.o
diff --git a/sound/arm/mxc-alsa-common.h b/sound/arm/mxc-alsa-common.h
new file mode 100644
index 000000000000..863c0432510b
--- /dev/null
+++ b/sound/arm/mxc-alsa-common.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+ /*!
+  * @file mxc-alsa-common.h
+  * @brief
+  * @ingroup SOUND_DRV
+  */
+
+#ifndef __MXC_ALSA_COMMON_H__
+#define __MXC_ALSA_COMMON_H__
+
+/* Enums typically used by the Mixer support APIs
+  * Emunerates IP, OP and mixer sources.
+  */
+
+typedef enum {
+	CODEC_DIR_OUT,
+	MIXER_OUT
+} OUTPUT_SOURCE;
+
+typedef enum {
+	OP_NODEV = -1,
+	OP_EARPIECE,
+	OP_HANDSFREE,
+	OP_HEADSET,
+	OP_LINEOUT,
+	OP_MAXDEV,
+	OP_MONO
+} OUTPUT_DEVICES;
+
+typedef enum {
+	IP_NODEV = -1,
+	IP_HANDSET,
+	IP_HEADSET,
+	IP_LINEIN,
+	IP_MAXDEV
+} INPUT_DEVICES;
+
+extern int mxc_alsa_create_ctl(struct snd_card *card, void *p_value);
+
+extern int set_mixer_output_device(PMIC_AUDIO_HANDLE handle, OUTPUT_SOURCE src,
+				   OUTPUT_DEVICES dev, bool enable);
+extern int set_mixer_output_volume(PMIC_AUDIO_HANDLE handle, int volume,
+				   OUTPUT_DEVICES dev);
+extern int set_mixer_input_device(PMIC_AUDIO_HANDLE handle, INPUT_DEVICES dev,
+				  bool enable);
+extern int set_mixer_output_mono_adder(PMIC_AUDIO_MONO_ADDER_MODE mode);
+extern int set_mixer_input_gain(PMIC_AUDIO_HANDLE handle, int val);
+extern int set_mixer_output_balance(int bal);
+
+extern int get_mixer_output_device(void);
+extern int get_mixer_output_volume(void);
+extern int get_mixer_output_mono_adder(void);
+extern int get_mixer_output_balance(void);
+extern int get_mixer_input_gain(void);
+extern int get_mixer_input_device(void);
+#endif				/* __MXC_ALSA_COMMON_H__ */
diff --git a/sound/arm/mxc-alsa-mixer.c b/sound/arm/mxc-alsa-mixer.c
new file mode 100644
index 000000000000..c77120cf48eb
--- /dev/null
+++ b/sound/arm/mxc-alsa-mixer.c
@@ -0,0 +1,410 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+ /*!
+  * @file       mxc-alsa-mixer.c
+  * @brief      this file implements the mxc sound driver mixer interface for ALSA.
+  *             The mxc sound driver supports mono/stereo recording (there are
+  *             some limitations due to hardware), mono/stereo playback and
+  *             audio mixing. This file implements output switching, volume/balance controls
+  *             mono adder config, I/P dev switching and gain on the PCM streams.
+  *             Recording supports 8000 khz and 16000 khz sample rate.
+  *             Playback supports 8000, 11025, 16000, 22050, 24000, 32000,
+  *             44100 and 48000 khz for mono and stereo.
+  *
+  * @ingroup SOUND_DRV
+  */
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <linux/soundcard.h>
+#include <mach/pmic_audio.h>
+#include "mxc-alsa-common.h"
+/*!
+  * These are the functions implemented in the ALSA PCM driver that
+  * are used for mixer operations
+  *
+  */
+
+/*!
+  * These are the callback functions for mixer controls
+  *
+  */
+/* Output device control*/
+static int pmic_mixer_output_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 15;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+static int pmic_mixer_output_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *uvalue)
+{
+	int dev, i;
+	dev = uvalue->value.integer.value[0];
+	for (i = OP_EARPIECE; i < OP_MAXDEV; i++) {
+		if (dev & (1 << i)) {
+			set_mixer_output_device(NULL, MIXER_OUT, i, 1);
+		} else {
+			set_mixer_output_device(NULL, MIXER_OUT, i, 0);
+		}
+	}
+	return 0;
+}
+static int pmic_mixer_output_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *uvalue)
+{
+	int val, ret = 0, i = 0;
+	for (i = OP_EARPIECE; i < OP_MAXDEV; i++) {
+		val = get_mixer_output_device();
+		if (val & SOUND_MASK_PHONEOUT)
+			ret = ret | 1;
+		if (val & SOUND_MASK_SPEAKER)
+			ret = ret | 2;
+		if (val & SOUND_MASK_VOLUME)
+			ret = ret | 4;
+		if (val & SOUND_MASK_PCM)
+			ret = ret | 8;
+		uvalue->value.integer.value[0] = ret;
+	}
+	return 0;
+
+}
+
+/* Input gain control*/
+static int pmic_cap_volume_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 100;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+static int pmic_cap_volume_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+	int val;
+	val = get_mixer_input_gain();
+	val = val & 0xFF;
+	uvalue->value.integer.value[0] = val;
+	return 0;
+}
+
+static int pmic_cap_volume_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+
+	int vol;
+	vol = uvalue->value.integer.value[0];
+	vol = vol | (vol << 8);
+	set_mixer_input_gain(NULL, vol);
+	return 0;
+}
+
+/* Mono adder control*/
+static int pmic_pb_monoconfig_info(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 3;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+static int pmic_pb_monoconfig_put(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *uvalue)
+{
+	int mono;
+	mono = uvalue->value.integer.value[0];
+	set_mixer_output_mono_adder(mono);
+	return 0;
+}
+static int pmic_pb_monoconfig_get(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *uvalue)
+{
+	uvalue->value.integer.value[0] = get_mixer_output_mono_adder();
+	return 0;
+}
+
+/*!
+  * These are the ALSA control structures with init values
+  *
+  */
+
+/* Input device control*/
+static int pmic_cap_input_info(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 7;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+static int pmic_cap_input_put(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *uvalue)
+{
+	int dev, i;
+	dev = uvalue->value.integer.value[0];
+	for (i = IP_HANDSET; i < IP_MAXDEV; i++) {
+		if (dev & (1 << i)) {
+			set_mixer_input_device(NULL, i, 1);
+		} else {
+			set_mixer_input_device(NULL, i, 0);
+		}
+	}
+	return 0;
+}
+static int pmic_cap_input_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *uvalue)
+{
+	int val, ret = 0, i = 0;
+	for (i = IP_HANDSET; i < IP_MAXDEV; i++) {
+		val = get_mixer_input_device();
+		if (val & SOUND_MASK_PHONEIN)
+			ret = ret | 1;
+		if (val & SOUND_MASK_MIC)
+			ret = ret | 2;
+		if (val & SOUND_MASK_LINE)
+			ret = ret | 4;
+		uvalue->value.integer.value[0] = ret;
+	}
+	return 0;
+}
+
+/* Volume control*/
+static int pmic_pb_volume_put(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *uvalue)
+{
+	int volume;
+	volume = uvalue->value.integer.value[0];
+	volume = volume | (volume << 8);
+	set_mixer_output_volume(NULL, volume, OP_NODEV);
+	return 0;
+}
+static int pmic_pb_volume_info(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 1;
+	uinfo->value.integer.max = 100;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+
+static int pmic_pb_volume_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *uvalue)
+{
+	int val;
+	val = get_mixer_output_volume();
+	val = val & 0xFF;
+	uvalue->value.integer.value[0] = val;
+	return 0;
+}
+
+/* Balance control start */
+static int pmic_pb_balance_info(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 100;
+	uinfo->value.integer.step = 1;
+	return 0;
+}
+
+static int pmic_pb_balance_get(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+	uvalue->value.integer.value[0] = get_mixer_output_balance();
+	return 0;
+
+}
+static int pmic_pb_balance_put(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_value *uvalue)
+{
+	int bal;
+	bal = uvalue->value.integer.value[0];
+	set_mixer_output_balance(bal);
+	return 0;
+}
+
+/* Balance control end */
+
+/* loopback control start */
+static int pmic_loopback_info(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_info *uinfo)
+{
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	return 0;
+}
+
+static int pmic_loopback_get(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *uvalue)
+{
+	uvalue->value.integer.value[0] = kcontrol->private_value;
+	return 0;
+
+}
+static int pmic_loopback_put(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *uvalue)
+{
+	int changed;
+	long flag = uvalue->value.integer.value[0];
+	changed =
+	    (uvalue->value.integer.value[0] == kcontrol->private_value) ? 0 : 1;
+	kcontrol->private_value = uvalue->value.integer.value[0];
+	if (flag)
+		pmic_audio_fm_output_enable(true);
+	else
+		pmic_audio_fm_output_enable(false);
+
+	return changed;
+}
+
+/* Loopback control end */
+
+/* Kcontrol structure definitions */
+struct snd_kcontrol_new pmic_control_pb_vol __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Playback Volume",
+	.index = 0x00,
+	.info = pmic_pb_volume_info,
+	.get = pmic_pb_volume_get,
+	.put = pmic_pb_volume_put,
+	.private_value = 0xffab1,
+};
+
+struct snd_kcontrol_new pmic_control_pb_bal __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Balance Playback Volume",
+	.index = 0x00,
+	.info = pmic_pb_balance_info,
+	.get = pmic_pb_balance_get,
+	.put = pmic_pb_balance_put,
+	.private_value = 0xffab2,
+};
+struct snd_kcontrol_new pmic_control_pb_monoconfig __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Monoconfig Playback Volume",
+	.index = 0x00,
+	.info = pmic_pb_monoconfig_info,
+	.get = pmic_pb_monoconfig_get,
+	.put = pmic_pb_monoconfig_put,
+	.private_value = 0xffab2,
+};
+struct snd_kcontrol_new pmic_control_op_sw __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Output Playback Volume",
+	.index = 0x00,
+	.info = pmic_mixer_output_info,
+	.get = pmic_mixer_output_get,
+	.put = pmic_mixer_output_put,
+	.private_value = 0xffab4,
+};
+
+struct snd_kcontrol_new pmic_control_cap_vol __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Capture Volume",
+	.index = 0x00,
+	.info = pmic_cap_volume_info,
+	.get = pmic_cap_volume_get,
+	.put = pmic_cap_volume_put,
+	.private_value = 0xffab5,
+};
+struct snd_kcontrol_new pmic_control_ip_sw __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Master Input Capture Volume",
+	.index = 0x00,
+	.info = pmic_cap_input_info,
+	.get = pmic_cap_input_get,
+	.put = pmic_cap_input_put,
+	.private_value = 0xffab5,
+};
+
+struct snd_kcontrol_new pmic_control_loop_out __devinitdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Loopback Line-in",
+	.index = 0x00,
+	.info = pmic_loopback_info,
+	.get = pmic_loopback_get,
+	.put = pmic_loopback_put,
+	.private_value = 0,
+};
+
+/*!
+  * This function registers the control components of ALSA Mixer
+  * It is called by ALSA PCM init.
+  *
+  * @param	card pointer to the ALSA sound card structure.
+  *
+  * @return              0 on success, -ve otherwise.
+  */
+int __devinit mxc_alsa_create_ctl(struct snd_card *card, void *p_value)
+{
+	int err = 0;
+
+	if ((err =
+	     snd_ctl_add(card, snd_ctl_new1(&pmic_control_op_sw, p_value))) < 0)
+		return err;
+
+	if ((err =
+	     snd_ctl_add(card,
+			 snd_ctl_new1(&pmic_control_pb_vol, p_value))) < 0)
+		return err;
+	if ((err =
+	     snd_ctl_add(card,
+			 snd_ctl_new1(&pmic_control_pb_monoconfig,
+				      p_value))) < 0)
+		return err;
+	if ((err =
+	     snd_ctl_add(card,
+			 snd_ctl_new1(&pmic_control_pb_bal, p_value))) < 0)
+		return err;
+	if ((err =
+	     snd_ctl_add(card,
+			 snd_ctl_new1(&pmic_control_cap_vol, p_value))) < 0)
+		return err;
+	if ((err =
+	     snd_ctl_add(card, snd_ctl_new1(&pmic_control_ip_sw, p_value))) < 0)
+		return err;
+	err = snd_ctl_add(card, snd_ctl_new1(&pmic_control_loop_out, p_value));
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+EXPORT_SYMBOL(mxc_alsa_create_ctl);
diff --git a/sound/arm/mxc-alsa-pmic.c b/sound/arm/mxc-alsa-pmic.c
new file mode 100644
index 000000000000..07f9f0fe581f
--- /dev/null
+++ b/sound/arm/mxc-alsa-pmic.c
@@ -0,0 +1,3793 @@
+/*
+ * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+ /*!
+  * @defgroup SOUND_DRV MXC Sound Driver for ALSA
+  */
+
+ /*!
+  * @file       mxc-alsa-pmic.c
+  * @brief      this fle       mxc-alsa-pmic.c
+  * @brief      this file implements the mxc sound driver interface for ALSA.
+  *             The mxc sound driver supports mono/stereo recording (there are
+  *             some limitations due to hardware), mono/stereo playback and
+  *             audio mixing.
+  *             Recording supports 8000 khz and 16000 khz sample rate.
+  *             Playback supports 8000, 11025, 16000, 22050, 24000, 32000,
+  *             44100, 48000 and 96000 Hz for mono and stereo.
+  *             This file also handles the software mixer and abstraction APIs
+  *             that control the volume,balance,mono-adder,input and output
+  *             devices for PMIC.
+  *             These mixer controls shall be accessible thru alsa as well as
+  *             OSS emulation modes
+  *
+  * @ingroup SOUND_DRV
+  */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/ioctl.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/soundcard.h>
+
+#ifdef CONFIG_PM
+#include <linux/pm.h>
+#endif				/* CONFIG_PM */
+
+#include <mach/dma.h>
+#include <asm/mach-types.h>
+
+#include <ssi/ssi.h>
+#include <ssi/registers.h>
+#include <dam/dam.h>
+#include <mach/pmic_external.h>
+#include <mach/pmic_audio.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+#include "mxc-alsa-pmic.h"
+#include "mxc-alsa-common.h"
+#include <linux/fs.h>
+#include <linux/clk.h>
+
+/*
+ * PMIC driver buffer policy.
+ * Customize here if the sound is not correct
+ */
+#define MAX_BUFFER_SIZE  			(32*1024)
+#define DMA_BUF_SIZE				(8*1024)
+#define MIN_PERIOD_SIZE				64
+#define MIN_PERIOD				2
+#define MAX_PERIOD				255
+
+#define AUD_MUX_CONF 				0x0031010
+#define MASK_2_TS				0xfffffffc
+#define MASK_1_TS				0xfffffffd
+#define MASK_1_TS_MIX				0xfffffffc
+#define MASK_1_TS_STDAC				0xfffffffe
+#define MASK_1_TS_REC				0xfffffffe
+#define SOUND_CARD_NAME				"MXC"
+
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+#define MAX_IRAM_SIZE   (IRAM_SIZE - CONFIG_SDMA_IRAM_SIZE)
+#define DMA_IRAM_SIZE   (4*1024)
+#define ADMA_BASE_PADDR (IRAM_BASE_ADDR + CONFIG_SDMA_IRAM_SIZE)
+#define ADMA_BASE_VADDR (IRAM_BASE_ADDR_VIRT + CONFIG_SDMA_IRAM_SIZE)
+
+#if (MAX_IRAM_SIZE + CONFIG_SDMA_IRAM_SIZE) > IRAM_SIZE
+#error  "The IRAM size required has beyond the limitation of IC spec"
+#endif
+
+#if (MAX_IRAM_SIZE&(DMA_IRAM_SIZE-1))
+#error "The IRAM size for DMA ring buffer should be multiples of dma buffer size"
+#endif
+
+#endif				/* CONFIG_SND_MXC_PMIC_IRAM */
+
+/*!
+ * These defines enable DMA chaining for playback
+ * and capture respectively.
+ */
+#define MXC_SOUND_PLAYBACK_CHAIN_DMA_EN 1
+#define MXC_SOUND_CAPTURE_CHAIN_DMA_EN 1
+
+/*!
+  * ID for this card
+  */
+static char *id = NULL;
+
+#define MXC_ALSA_MAX_PCM_DEV 3
+#define MXC_ALSA_MAX_PLAYBACK 3
+#define MXC_ALSA_MAX_CAPTURE 1
+
+struct mxc_audio_platform_data *audio_data;
+/*!
+  * This structure is the global configuration of the soundcard
+  * that are accessed by the mixer as well as by the playback/recording
+  * stream. This contains various volume, balance, mono adder settings
+  *
+  */
+typedef struct audio_mixer_control {
+
+	/*!
+	 * This variable holds the current active output device(s)
+	 */
+	int output_device;
+
+	/*!
+	 * This variable holds the current active input device.
+	 */
+	int input_device;
+
+	/* Used only for playback/recording on codec .. Use 1 for playback
+	 * and 0 for recording*/
+	int direction;
+
+	/*!
+	 * This variable holds the current source for active ouput device(s)
+	 */
+	OUTPUT_SOURCE source_for_output[OP_MAXDEV];
+
+	/*!
+	 * This variable says if a given output device is part of an ongoing
+	 * playback. This variable will be set and reset by the playback stream
+	 * when stream is activated and when stream is closed. This shall also
+	 * be set and reset my mixer functions for enabling/disabling output devs
+	 */
+	int output_active[OP_MAXDEV];
+
+	/*!
+	 * This variable holds the current volume for active input device.
+	 * This maps to the input gain of recording device
+	 */
+	int input_volume;
+
+	/*!
+	 * This variable holds the current volume for playback devices.
+	 */
+	//int output_volume[OP_MAXDEV];
+	int master_volume_out;
+
+	/*!
+	 * This variable holds the balance setting for the mixer out.
+	 * The range is 0 to 100. 50 means both L and R equal.
+	 * < 50 attenuates left side and > 50 attenualtes right side
+	 */
+	int mixer_balance;
+
+	/*!
+	 * This variable holds the current mono adder config.
+	 */
+	PMIC_AUDIO_MONO_ADDER_MODE mixer_mono_adder;
+
+	/*!
+	 * Semaphore used to control the access to this structure.
+	 */
+	struct semaphore sem;
+
+	/*!
+	 * These variables are set by PCM stream and mixer when the voice codec's / ST dac's outputs are
+	 * connected to the analog mixer of PMIC audio chip
+	 */
+	int codec_out_to_mixer;
+	int stdac_out_to_mixer;
+
+	int codec_playback_active;
+	int codec_capture_active;
+	int stdac_playback_active;
+	int mixing_active;
+
+	/*!
+	 * This variable holds the configuration of the headset which was previously enabled.
+	 */
+	int old_prof;
+
+	PMIC_AUDIO_HANDLE stdac_handle;
+	PMIC_AUDIO_HANDLE voice_codec_handle;
+
+} audio_mixer_control_t;
+
+/*!
+  * This structure stores current state of audio configuration
+  * soundcard wrt a specific stream (playback on different DACs, recording on the codec etc).
+  * It is used to set/get current values and are NOT accessed by the Mixer. This structure shall
+  * be retrieved thru pcm substream pointer and hence the mixer component will have no access
+  * to it. There will be as many structures as the number of streams. In our case it's 3. Codec playback
+  * STDAC playback and voice codec recording.
+  * This structure will be used at the beginning of activating a stream to configure audio chip.
+  *
+  */
+typedef struct pmic_audio_device {
+
+	PMIC_AUDIO_HANDLE handle;
+	/*!
+	 * This variable holds the sample rate currently being used.
+	 */
+	int sample_rate;
+
+	/*!
+	 * This variable holds the current protocol PMIC is using.
+	 * PMIC can use one of three protocols at any given time:
+	 * normal, network and I2S.
+	 */
+	int protocol;
+
+	/*!
+	 * This variables tells us whether PMIC runs in
+	 * master mode (PMIC generates audio clocks)or slave mode (AP side
+	 * generates audio clocks)
+	 *
+	 * Currently the default mode is master mode because PMIC clocks have
+	 * higher precision.
+	 */
+	int mode;
+
+	/* This variable holds the value representing the
+	 * base clock PMIC will use to generate internal
+	 * clocks (BCL clock and FrameSync clock)
+	 */
+	int pll;
+
+	/*!
+	 * This variable holds the SSI to which PMIC is currently connected.
+	 */
+	int ssi;
+
+	/*!
+	 * This variable tell us whether bit clock is inverted or not.
+	 */
+	int bcl_inverted;
+
+	/*!
+	 * This variable tell us whether frame clock is inverted or not.
+	 */
+	int fs_inverted;
+
+	/*!
+	 * This variable holds the pll used for PMIC audio operations.
+	 */
+	int pll_rate;
+
+	/*!
+	 * This variable holds the filter that PMIC is applying to
+	 * CODEC operations.
+	 */
+	int codec_filter;
+
+} pmic_audio_device_t;
+
+/*!
+  * This structure represents an audio stream in term of
+  * channel DMA, HW configuration on PMIC and on AudioMux/SSI
+  */
+typedef struct audio_stream {
+	/*!
+	 * identification string
+	 */
+	char *id;
+
+	/*!
+	 * numeric identification
+	 */
+	int stream_id;
+
+	/*!
+	 * SSI ID on the ARM side
+	 */
+	int ssi;
+
+	/*!
+	 * DAM port on the ARM side
+	 */
+	int dam_port;
+
+	/*!
+	 * device identifier for DMA
+	 */
+	int dma_wchannel;
+
+	/*!
+	 * we are using this stream for transfer now
+	 */
+	int active:1;
+
+	/*!
+	 * current transfer period
+	 */
+	int period;
+
+	/*!
+	 * current count of transfered periods
+	 */
+	int periods;
+
+	/*!
+	 * are we recording - flag used to do DMA trans. for sync
+	 */
+	int tx_spin;
+
+	/*!
+	 * Previous offset value for resume
+	 */
+	unsigned int old_offset;
+#if 0
+	/*!
+	 * Path for this stream
+	 */
+	device_data_t stream_device;
+#endif
+
+	/*!
+	 * pmic audio chip stream specific configuration
+	 */
+	pmic_audio_device_t pmic_audio_device;
+
+	/*!
+	 * for locking in DMA operations
+	 */
+	spinlock_t dma_lock;
+
+	/*!
+	 * Alsa substream pointer
+	 */
+	struct snd_pcm_substream *stream;
+} audio_stream_t;
+
+/*!
+  * This structure represents the PMIC sound card with its
+  * 2 streams (StDac and Codecs) and its shared parameters
+  */
+typedef struct snd_card_mxc_pmic_audio {
+	/*!
+	 * ALSA sound card handle
+	 */
+	struct snd_card *card;
+
+	/*!
+	 * ALSA pcm driver type handle
+	 */
+	struct snd_pcm *pcm[MXC_ALSA_MAX_PCM_DEV];
+
+	/*!
+	 * playback & capture streams handle
+	 * We can support a maximum of two playback streams (voice-codec
+	 * and ST-DAC) and 1 recording stream
+	 */
+	audio_stream_t s[MXC_ALSA_MAX_CAPTURE + MXC_ALSA_MAX_PLAYBACK];
+
+} mxc_pmic_audio_t;
+
+/*!
+ * pmic audio chip parameters for IP/OP and volume controls
+ */
+audio_mixer_control_t audio_mixer_control;
+
+/*!
+  * Global variable that represents the PMIC soundcard
+  * with its 2 availables stream devices: stdac and codec
+  */
+mxc_pmic_audio_t *mxc_audio = NULL;
+
+/*!
+  * Supported playback rates array
+  */
+static unsigned int playback_rates_stereo[] = {
+	8000,
+	11025,
+	12000,
+	16000,
+	22050,
+	24000,
+	32000,
+	44100,
+	48000,
+	64000,
+	96000,
+};
+
+static unsigned int playback_rates_mono[] = {
+	8000,
+	16000,
+};
+
+/*!
+  * Supported capture rates array
+  */
+static unsigned int capture_rates[] = {
+	8000,
+	16000,
+};
+
+/*!
+  * this structure represents the sample rates supported
+  * by PMIC for playback operations on StDac.
+  */
+static struct snd_pcm_hw_constraint_list hw_playback_rates_stereo = {
+	.count = ARRAY_SIZE(playback_rates_stereo),
+	.list = playback_rates_stereo,
+	.mask = 0,
+};
+
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+static spinlock_t g_audio_iram_lock = SPIN_LOCK_UNLOCKED;
+static int g_audio_iram_en = 1;
+static int g_device_opened = 0;
+extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
+			      unsigned long end);
+
+static inline int mxc_snd_enable_iram(int enable)
+{
+	int ret = -EBUSY;
+	unsigned long flags;
+	spin_lock_irqsave(&g_audio_iram_lock, flags);
+	if (!g_device_opened) {
+		g_audio_iram_en = (enable != 0);
+		ret = 0;
+	}
+	spin_unlock_irqrestore(&g_audio_iram_lock, flags);
+	return ret;
+}
+
+static inline void mxc_snd_pcm_iram_get(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&g_audio_iram_lock, flags);
+	g_audio_iram_en++;
+	spin_unlock_irqrestore(&g_audio_iram_lock, flags);
+}
+
+static inline void mxc_snd_pcm_iram_put(void)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&g_audio_iram_lock, flags);
+	g_audio_iram_en--;
+	spin_unlock_irqrestore(&g_audio_iram_lock, flags);
+}
+
+struct snd_dma_buffer g_iram_dmab;
+
+#endif				/* CONFIG_SND_MXC_PMIC_IRAM */
+
+/*!
+  * this structure represents the sample rates supported
+  * by PMIC for playback operations on Voice codec.
+  */
+static struct snd_pcm_hw_constraint_list hw_playback_rates_mono = {
+	.count = ARRAY_SIZE(playback_rates_mono),
+	.list = playback_rates_mono,
+	.mask = 0,
+};
+
+/*!
+  * this structure represents the sample rates supported
+  * by PMIC for capture operations on Codec.
+  */
+static struct snd_pcm_hw_constraint_list hw_capture_rates = {
+	.count = ARRAY_SIZE(capture_rates),
+	.list = capture_rates,
+	.mask = 0,
+};
+
+#ifdef CONFIG_HEADSET_DETECT_ENABLE
+static PMIC_HS_STATE hs_state;
+
+/*!
+ *This is used to maintain the state of the Headset*/
+static int headset_state = 0;
+
+/*Callback for headset event. */
+static void HSCallback(const PMIC_HS_STATE hs_st)
+{
+
+	msleep(10);
+
+	if (headset_state == 1) {
+		pmic_audio_output_disable_phantom_ground();
+		headset_state = 0;
+		if (audio_mixer_control.stdac_playback_active)
+			pmic_audio_output_clear_port(audio_mixer_control.
+						     stdac_handle,
+						     STEREO_HEADSET_LEFT |
+						     STEREO_HEADSET_RIGHT);
+		else if (audio_mixer_control.voice_codec_handle)
+			pmic_audio_output_clear_port(audio_mixer_control.
+						     voice_codec_handle,
+						     STEREO_HEADSET_LEFT |
+						     STEREO_HEADSET_RIGHT);
+
+		if (audio_mixer_control.old_prof & (SOUND_MASK_PHONEOUT)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_EARPIECE,
+						1);
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_VOLUME)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_HANDSFREE,
+						1);
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_SPEAKER)) {
+#ifdef CONFIG_HEADSET_DETECT_ENABLE
+			/*This is a temporary workaround which should be removed later */
+			set_mixer_output_device(NULL, MIXER_OUT, OP_MONO, 1);
+#else
+			set_mixer_output_device(NULL, MIXER_OUT, OP_HEADSET, 1);
+#endif
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_PCM)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_LINEOUT, 1);
+		}
+
+	} else {
+		headset_state = 1;
+
+		pmic_audio_output_enable_phantom_ground();
+
+		audio_mixer_control.old_prof =
+		    audio_mixer_control.output_device;
+
+		if (audio_mixer_control.old_prof & (SOUND_MASK_PHONEOUT)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_EARPIECE,
+						0);
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_VOLUME)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_HANDSFREE,
+						0);
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_SPEAKER)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_HEADSET, 0);
+		}
+		if (audio_mixer_control.old_prof & (SOUND_MASK_PCM)) {
+			set_mixer_output_device(NULL, MIXER_OUT, OP_LINEOUT, 0);
+		}
+		/*This is a temporary workaround which should be removed later */
+		set_mixer_output_device(NULL, MIXER_OUT, OP_MONO, 1);
+
+	}
+}
+
+#endif
+/*!
+  * This function configures audio multiplexer to support
+  * audio data routing in PMIC master mode.
+  *
+  * @param       ssi	SSI of the ARM to connect to the DAM.
+  */
+void configure_dam_pmic_master(int ssi)
+{
+	int source_port;
+	int target_port;
+
+	if (ssi == SSI1) {
+		pr_debug("DAM: port 1 -> port 4\n");
+		source_port = audio_data->src_port;
+
+		target_port = port_4;
+	} else {
+		pr_debug("DAM: port 2 -> port 5\n");
+		source_port = port_2;
+		target_port = port_5;
+	}
+
+	dam_reset_register(source_port);
+	dam_reset_register(target_port);
+
+	dam_select_mode(source_port, normal_mode);
+	dam_select_mode(target_port, internal_network_mode);
+
+	dam_set_synchronous(source_port, true);
+	dam_set_synchronous(target_port, true);
+
+	dam_select_RxD_source(source_port, target_port);
+	dam_select_RxD_source(target_port, source_port);
+
+	dam_select_TxFS_direction(source_port, signal_out);
+	dam_select_TxFS_source(source_port, false, target_port);
+
+	dam_select_TxClk_direction(source_port, signal_out);
+	dam_select_TxClk_source(source_port, false, target_port);
+
+	dam_select_RxFS_direction(source_port, signal_out);
+	dam_select_RxFS_source(source_port, false, target_port);
+
+	dam_select_RxClk_direction(source_port, signal_out);
+	dam_select_RxClk_source(source_port, false, target_port);
+
+	dam_set_internal_network_mode_mask(target_port, 0xfc);
+
+	writel(AUD_MUX_CONF, IO_ADDRESS(AUDMUX_BASE_ADDR) + 0x38);
+}
+
+/*!
+  * This function configures the SSI in order to receive audio
+  * from PMIC (recording). Configuration of SSI consists mainly in
+  * setting the following:
+  *
+  * 1) SSI to use (SSI1 or SSI2)
+  * 2) SSI mode (normal or network. We use always network mode)
+  * 3) SSI STCCR register settings, which control the sample rate (BCL and
+  *    FS clocks)
+  * 4) Watermarks for SSI FIFOs as well as timeslots to be used.
+  * 5) Enable SSI.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  */
+void configure_ssi_rx(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	int ssi;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[substream->pstr->stream];
+	ssi = s->ssi;
+
+	pr_debug("configure_ssi_rx: SSI %d\n", ssi + 1);
+
+	ssi_enable(ssi, false);
+	ssi_synchronous_mode(ssi, true);
+	ssi_network_mode(ssi, true);
+
+	if (machine_is_mx27ads()) {
+		ssi_tx_clock_divide_by_two(ssi, 0);
+		ssi_tx_clock_prescaler(ssi, 0);
+		ssi_tx_frame_rate(ssi, 2);
+	}
+	/* OJO */
+	ssi_tx_frame_rate(ssi, 1);
+
+	ssi_tx_early_frame_sync(ssi, ssi_frame_sync_one_bit_before);
+	ssi_tx_frame_sync_length(ssi, ssi_frame_sync_one_bit);
+	ssi_tx_word_length(ssi, ssi_16_bits);
+
+	ssi_rx_early_frame_sync(ssi, ssi_frame_sync_one_bit_before);
+	ssi_rx_frame_sync_length(ssi, ssi_frame_sync_one_bit);
+	ssi_rx_fifo_enable(ssi, ssi_fifo_0, true);
+	ssi_rx_bit0(ssi, true);
+
+	ssi_rx_fifo_full_watermark(ssi, ssi_fifo_0, RX_WATERMARK);
+
+	/* We never use the divider by 2 implemented in SSI */
+	ssi_rx_clock_divide_by_two(ssi, 0);
+
+	/* Set prescaler range (a fixed divide-by-eight prescaler
+	 * in series with the variable prescaler) to 0 as we don't
+	 * need it.
+	 */
+	ssi_rx_clock_prescaler(ssi, 0);
+
+	/* Currently, only supported sample length is 16 bits */
+	ssi_rx_word_length(ssi, ssi_16_bits);
+
+	/* set direction of clocks ("externally" means that clocks come
+	 * from PMIC to MCU)
+	 */
+	ssi_rx_frame_direction(ssi, ssi_tx_rx_externally);
+	ssi_rx_clock_direction(ssi, ssi_tx_rx_externally);
+
+	/* Frame Rate Divider Control.
+	 * In Normal mode, this ratio determines the word
+	 * transfer rate. In Network mode, this ration sets
+	 * the number of words per frame.
+	 */
+	ssi_tx_frame_rate(ssi, 4);
+	ssi_rx_frame_rate(ssi, 4);
+
+	ssi_enable(ssi, true);
+}
+
+/*!
+  * This function configures the SSI in order to
+  * send data to PMIC. Configuration of SSI consists
+  * mainly in setting the following:
+  *
+  * 1) SSI to use (SSI1 or SSI2)
+  * 2) SSI mode (normal for normal use e.g. playback, network for mixing)
+  * 3) SSI STCCR register settings, which control the sample rate (BCL and
+  *    FS clocks)
+  * 4) Watermarks for SSI FIFOs as well as timeslots to be used.
+  * 5) Enable SSI.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  */
+void configure_ssi_tx(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	struct snd_pcm_runtime *runtime;
+	int ssi;
+	int device, stream_id = -1;
+	device = substream->pcm->device;
+	if (device == 0)
+		stream_id = 0;
+	else if (device == 1)
+		stream_id = 2;
+	else
+		stream_id = 3;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[stream_id];
+	runtime = substream->runtime;
+	ssi = s->ssi;
+
+	pr_debug("configure_ssi_tx: SSI %d\n", ssi + 1);
+
+	ssi_enable(ssi, false);
+	ssi_synchronous_mode(ssi, true);
+	if (runtime->channels == 1) {
+		if (stream_id == 2) {
+			ssi_network_mode(ssi, true);
+		} else {
+#ifndef  CONFIG_SND_MXC_PLAYBACK_MIXING
+			ssi_network_mode(ssi, false);
+#endif
+		}
+	} else {
+		ssi_network_mode(ssi, true);
+	}
+
+#ifdef  CONFIG_SND_MXC_PLAYBACK_MIXING
+	ssi_two_channel_mode(ssi, true);
+	ssi_tx_fifo_enable(ssi, ssi_fifo_1, true);
+	ssi_tx_fifo_empty_watermark(ssi, ssi_fifo_1, TX_WATERMARK);
+#endif
+
+	ssi_tx_early_frame_sync(ssi, ssi_frame_sync_one_bit_before);
+	ssi_tx_frame_sync_length(ssi, ssi_frame_sync_one_bit);
+	ssi_tx_fifo_enable(ssi, ssi_fifo_0, true);
+	ssi_tx_bit0(ssi, true);
+
+	ssi_tx_fifo_empty_watermark(ssi, ssi_fifo_0, TX_WATERMARK);
+
+	/* We never use the divider by 2 implemented in SSI */
+	ssi_tx_clock_divide_by_two(ssi, 0);
+
+	ssi_tx_clock_prescaler(ssi, 0);
+
+	/*Currently, only supported sample length is 16 bits */
+	ssi_tx_word_length(ssi, ssi_16_bits);
+
+	/* clocks are being provided by PMIC */
+	ssi_tx_frame_direction(ssi, ssi_tx_rx_externally);
+	ssi_tx_clock_direction(ssi, ssi_tx_rx_externally);
+
+	if (runtime->channels == 1) {
+#ifndef CONFIG_SND_MXC_PLAYBACK_MIXING
+		if (stream_id == 2) {
+			ssi_tx_frame_rate(ssi, 4);
+		} else {
+			ssi_tx_frame_rate(ssi, 1);
+		}
+#else
+		if (stream_id == 2) {
+			ssi_tx_frame_rate(ssi, 2);
+		}
+#endif
+
+	} else {
+		ssi_tx_frame_rate(ssi, 2);
+	}
+
+	ssi_enable(ssi, true);
+}
+
+/*!
+  * This function normalizes speed given by the user
+  * if speed is not supported, the function will
+  * calculate the nearest one.
+  *
+  * @param       speed   speed requested by the user.
+  *
+  * @return      The normalized speed.
+  */
+int adapt_speed(int speed)
+{
+
+	/* speeds from 8k to 96k */
+	if (speed >= (64000 + 96000) / 2) {
+		speed = 96000;
+	} else if (speed >= (48000 + 64000) / 2) {
+		speed = 64000;
+	} else if (speed >= (44100 + 48000) / 2) {
+		speed = 48000;
+	} else if (speed >= (32000 + 44100) / 2) {
+		speed = 44100;
+	} else if (speed >= (24000 + 32000) / 2) {
+		speed = 32000;
+	} else if (speed >= (22050 + 24000) / 2) {
+		speed = 24000;
+	} else if (speed >= (16000 + 22050) / 2) {
+		speed = 22050;
+	} else if (speed >= (12000 + 16000) / 2) {
+		speed = 16000;
+	} else if (speed >= (11025 + 12000) / 2) {
+		speed = 12000;
+	} else if (speed >= (8000 + 11025) / 2) {
+		speed = 11025;
+	} else {
+		speed = 8000;
+	}
+	return speed;
+}
+
+/*!
+  * This function get values to be put in PMIC registers.
+  * This values represents the sample rate that PMIC
+  * should use for current playback or recording.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  */
+void normalize_speed_for_pmic(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	pmic_audio_device_t *pmic_device;
+	struct snd_pcm_runtime *runtime;
+	int device, stream_id = -1;
+	device = substream->pcm->device;
+	if (device == 0) {
+		if ((audio_mixer_control.codec_capture_active == 1)
+		    && (substream->stream == 1)) {
+			stream_id = 1;
+		} else
+			stream_id = 0;
+	} else {
+		stream_id = 2;
+	}
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[stream_id];
+	pmic_device = &s->pmic_audio_device;
+	runtime = substream->runtime;
+
+	/* As the driver allows continuous sample rate, we must adapt the rate */
+	runtime->rate = adapt_speed(runtime->rate);
+
+	if (pmic_device->handle == audio_mixer_control.voice_codec_handle) {
+		switch (runtime->rate) {
+		case 8000:
+			pmic_device->sample_rate = VCODEC_RATE_8_KHZ;
+			break;
+		case 16000:
+			pmic_device->sample_rate = VCODEC_RATE_16_KHZ;
+			break;
+		default:
+			pmic_device->sample_rate = VCODEC_RATE_8_KHZ;
+			break;
+		}
+
+	} else if (pmic_device->handle == audio_mixer_control.stdac_handle) {
+		switch (runtime->rate) {
+		case 8000:
+			pmic_device->sample_rate = STDAC_RATE_8_KHZ;
+			break;
+
+		case 11025:
+			pmic_device->sample_rate = STDAC_RATE_11_025_KHZ;
+			break;
+
+		case 12000:
+			pmic_device->sample_rate = STDAC_RATE_12_KHZ;
+			break;
+
+		case 16000:
+			pmic_device->sample_rate = STDAC_RATE_16_KHZ;
+			break;
+
+		case 22050:
+			pmic_device->sample_rate = STDAC_RATE_22_050_KHZ;
+			break;
+
+		case 24000:
+			pmic_device->sample_rate = STDAC_RATE_24_KHZ;
+			break;
+
+		case 32000:
+			pmic_device->sample_rate = STDAC_RATE_32_KHZ;
+			break;
+
+		case 44100:
+			pmic_device->sample_rate = STDAC_RATE_44_1_KHZ;
+			break;
+
+		case 48000:
+			pmic_device->sample_rate = STDAC_RATE_48_KHZ;
+			break;
+
+		case 64000:
+			pmic_device->sample_rate = STDAC_RATE_64_KHZ;
+			break;
+
+		case 96000:
+			pmic_device->sample_rate = STDAC_RATE_96_KHZ;
+			break;
+
+		default:
+			pmic_device->sample_rate = STDAC_RATE_8_KHZ;
+		}
+	}
+
+}
+
+/*!
+  * This function configures number of channels for next audio operation
+  * (recording/playback) Number of channels define if sound is stereo
+  * or mono.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+void set_pmic_channels(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	struct snd_pcm_runtime *runtime;
+	int device = -1, stream_id = -1;
+
+	chip = snd_pcm_substream_chip(substream);
+	device = substream->pcm->device;
+
+	if (device == 0) {
+		if (substream->pstr->stream == 1) {
+			stream_id = 1;
+		} else {
+			stream_id = 0;
+		}
+	} else {
+		stream_id = 2;
+	}
+	s = &chip->s[stream_id];
+	runtime = substream->runtime;
+
+	if (runtime->channels == 2) {
+		ssi_tx_mask_time_slot(s->ssi, MASK_2_TS);
+		ssi_rx_mask_time_slot(s->ssi, MASK_1_TS_REC);
+	} else {
+		if (stream_id == 2) {
+#ifdef CONFIG_MXC_PMIC_SC55112
+			ssi_tx_mask_time_slot(s->ssi, MASK_1_TS_REC);
+#else
+
+			if (audio_mixer_control.mixing_active == 1)
+				ssi_tx_mask_time_slot(s->ssi, MASK_1_TS_MIX);
+			else
+				ssi_tx_mask_time_slot(s->ssi, MASK_1_TS);
+
+#endif
+		} else {
+
+			ssi_tx_mask_time_slot(s->ssi, MASK_1_TS_STDAC);
+		}
+#ifndef CONFIG_SND_MXC_PLAYBACK_MIXING
+		ssi_rx_mask_time_slot(s->ssi, MASK_1_TS_REC);
+#endif
+
+	}
+
+}
+
+/*!
+  * This function sets the input device in PMIC. It takes an
+  * ALSA value and modifies registers using pmic-specific values.
+  *
+  * @param       handle  Handle to the PMIC device opened
+  * @param       val     ALSA value. This value defines the input device that
+  *                      PMIC should activate to get audio signal (recording)
+  * @param       enable  Whether to enable or diable the input
+  */
+int set_mixer_input_device(PMIC_AUDIO_HANDLE handle, INPUT_DEVICES dev,
+			   bool enable)
+{
+
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	if (handle != NULL) {
+		if (audio_mixer_control.input_device & SOUND_MASK_PHONEIN) {
+			pmic_audio_vcodec_set_mic(handle, MIC1_LEFT,
+						  MIC1_RIGHT_MIC_MONO);
+			pmic_audio_vcodec_enable_micbias(handle, MIC_BIAS1);
+		} else {
+			pmic_audio_vcodec_set_mic_on_off(handle,
+							 MIC1_LEFT,
+							 MIC1_RIGHT_MIC_MONO);
+			pmic_audio_vcodec_disable_micbias(handle, MIC_BIAS1);
+		}
+		if (audio_mixer_control.input_device & SOUND_MASK_MIC) {
+			pmic_audio_vcodec_set_mic(handle, NO_MIC, MIC2_AUX);
+			pmic_audio_vcodec_enable_micbias(handle, MIC_BIAS2);
+		} else {
+			pmic_audio_vcodec_set_mic_on_off(handle, NO_MIC,
+							 MIC2_AUX);
+			pmic_audio_vcodec_disable_micbias(handle, MIC_BIAS2);
+		}
+		if (audio_mixer_control.input_device & SOUND_MASK_LINE) {
+			pmic_audio_vcodec_set_mic(handle, NO_MIC, TXIN_EXT);
+		} else {
+			pmic_audio_vcodec_set_mic_on_off(handle, NO_MIC,
+							 TXIN_EXT);
+		}
+		up(&audio_mixer_control.sem);
+		return 0;
+
+	}
+	switch (dev) {
+	case IP_HANDSET:
+		pr_debug("Input: SOUND_MASK_PHONEIN \n");
+		if (handle == NULL) {
+			if (enable) {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic(handle,
+								  MIC1_LEFT,
+								  MIC1_RIGHT_MIC_MONO);
+					pmic_audio_vcodec_enable_micbias(handle,
+									 MIC_BIAS1);
+				}
+				audio_mixer_control.input_device |=
+				    SOUND_MASK_PHONEIN;
+			} else {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic_on_off(handle,
+									 MIC1_LEFT,
+									 MIC1_RIGHT_MIC_MONO);
+					pmic_audio_vcodec_disable_micbias
+					    (handle, MIC_BIAS1);
+				}
+				audio_mixer_control.input_device &=
+				    ~SOUND_MASK_PHONEIN;
+			}
+		}
+		break;
+
+	case IP_HEADSET:
+		if (handle == NULL) {
+			if (enable) {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic(handle,
+								  NO_MIC,
+								  MIC2_AUX);
+					pmic_audio_vcodec_enable_micbias(handle,
+									 MIC_BIAS2);
+				}
+				audio_mixer_control.input_device |=
+				    SOUND_MASK_MIC;
+			} else {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic_on_off(handle,
+									 NO_MIC,
+									 MIC2_AUX);
+					pmic_audio_vcodec_disable_micbias
+					    (handle, MIC_BIAS2);
+				}
+				audio_mixer_control.input_device &=
+				    ~SOUND_MASK_MIC;
+			}
+			// Enable Mic with MIC2_AUX
+		}
+		break;
+
+	case IP_LINEIN:
+		if (handle == NULL) {
+			if (enable) {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic(handle,
+								  NO_MIC,
+								  TXIN_EXT);
+				}
+				audio_mixer_control.input_device |=
+				    SOUND_MASK_LINE;
+			} else {
+				if (audio_mixer_control.codec_capture_active) {
+					handle =
+					    audio_mixer_control.
+					    voice_codec_handle;
+					pmic_audio_vcodec_set_mic_on_off(handle,
+									 NO_MIC,
+									 TXIN_EXT);
+				}
+				audio_mixer_control.input_device &=
+				    ~SOUND_MASK_LINE;
+			}
+		}
+		break;
+
+	default:
+		up(&audio_mixer_control.sem);
+		return -1;
+		break;
+	}
+	up(&audio_mixer_control.sem);
+	return 0;
+}
+
+EXPORT_SYMBOL(set_mixer_input_device);
+
+int get_mixer_input_device()
+{
+	int val;
+	val = audio_mixer_control.input_device;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_input_device);
+
+/*!
+  * This function sets the PMIC input device's gain.
+  * Note that the gain is the input volume
+  *
+  * @param       handle  Handle to the opened PMIC device
+  * @param       val     gain to be applied. This value can go
+  *                      from 0 (mute) to 100 (max gain)
+  */
+int set_mixer_input_gain(PMIC_AUDIO_HANDLE handle, int val)
+{
+	int leftdb, rightdb;
+	int left, right;
+
+	left = (val & 0x00ff);
+	right = ((val & 0xff00) >> 8);
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	leftdb = (left * PMIC_INPUT_VOLUME_MAX) / INPUT_VOLUME_MAX;
+	rightdb = (right * PMIC_INPUT_VOLUME_MAX) / INPUT_VOLUME_MAX;
+	audio_mixer_control.input_volume = val;
+	if (audio_mixer_control.voice_codec_handle == handle) {
+		pmic_audio_vcodec_set_record_gain(handle, VOLTAGE_TO_VOLTAGE,
+						  leftdb, VOLTAGE_TO_VOLTAGE,
+						  rightdb);
+	} else if ((handle == NULL)
+		   && (audio_mixer_control.codec_capture_active)) {
+		pmic_audio_vcodec_set_record_gain(audio_mixer_control.
+						  voice_codec_handle,
+						  VOLTAGE_TO_VOLTAGE, leftdb,
+						  VOLTAGE_TO_VOLTAGE, rightdb);
+	}
+	up(&audio_mixer_control.sem);
+	return 0;
+}
+
+EXPORT_SYMBOL(set_mixer_input_gain);
+
+int get_mixer_input_gain()
+{
+	int val;
+	val = audio_mixer_control.input_volume;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_input_gain);
+
+/*!
+  * This function sets the PMIC output device's volume.
+  *
+  * @param       handle  Handle to the PMIC device opened
+  * @param       volume  ALSA value. This value defines the playback volume
+  * @param       dev     which output device gets affected by this volume
+  *
+  */
+
+int set_mixer_output_volume(PMIC_AUDIO_HANDLE handle, int volume,
+			    OUTPUT_DEVICES dev)
+{
+	int leftdb, rightdb;
+	int right, left;
+
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	left = (volume & 0x00ff);
+	right = ((volume & 0xff00) >> 8);
+
+	leftdb = (left * PMIC_OUTPUT_VOLUME_MAX) / OUTPUT_VOLUME_MAX;
+	rightdb = (right * PMIC_OUTPUT_VOLUME_MAX) / OUTPUT_VOLUME_MAX;
+	if (handle == NULL) {
+		/* Invoked by mixer */
+		audio_mixer_control.master_volume_out = volume;
+		if (audio_mixer_control.codec_playback_active)
+			pmic_audio_output_set_pgaGain(audio_mixer_control.
+						      voice_codec_handle,
+						      rightdb);
+		if (audio_mixer_control.stdac_playback_active)
+			pmic_audio_output_set_pgaGain(audio_mixer_control.
+						      stdac_handle, rightdb);
+
+	} else {
+		/* change the required volume */
+		audio_mixer_control.master_volume_out = volume;
+		pmic_audio_output_set_pgaGain(handle, rightdb);
+	}
+	up(&audio_mixer_control.sem);
+	return 0;
+}
+
+EXPORT_SYMBOL(set_mixer_output_volume);
+
+int get_mixer_output_volume()
+{
+	int val;
+	val = audio_mixer_control.master_volume_out;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_output_volume);
+
+/*!
+  * This function sets the PMIC output device's balance.
+  *
+  * @param       bal     Balance to be applied. This value can go
+  *                      from 0 (Left atten) to 100 (Right atten)
+  *                      50 is both equal
+  */
+int set_mixer_output_balance(int bal)
+{
+	int channel = 0;
+	PMIC_AUDIO_OUTPUT_BALANCE_GAIN b_gain;
+	PMIC_AUDIO_HANDLE handle;
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	// Convert ALSA value to PMIC value i.e. atten and channel value
+	if (bal < 0)
+		bal = 0;
+	if (bal > 100)
+		bal = 100;
+	if (bal < 50) {
+		channel = 1;
+	} else {
+		bal = 100 - bal;
+		channel = 0;
+	}
+
+	b_gain = bal / 8;
+
+	audio_mixer_control.mixer_balance = bal;
+	if (audio_mixer_control.codec_playback_active) {
+		handle = audio_mixer_control.voice_codec_handle;
+		// Use codec's handle to set balance
+	} else if (audio_mixer_control.stdac_playback_active) {
+		handle = audio_mixer_control.stdac_handle;
+		// Use STDac's handle to set balance
+	} else {
+		up(&audio_mixer_control.sem);
+		return 0;
+	}
+	if (channel == 0)
+		pmic_audio_output_set_balance(handle, BAL_GAIN_0DB, b_gain);
+	else
+		pmic_audio_output_set_balance(handle, b_gain, BAL_GAIN_0DB);
+	up(&audio_mixer_control.sem);
+	return 0;
+}
+
+EXPORT_SYMBOL(set_mixer_output_balance);
+
+int get_mixer_output_balance()
+{
+	int val;
+	val = audio_mixer_control.mixer_balance;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_output_balance);
+
+/*!
+  * This function sets the PMIC output device's mono adder config.
+  *
+  * @param       mode    Mono adder mode to be set
+  */
+int set_mixer_output_mono_adder(PMIC_AUDIO_MONO_ADDER_MODE mode)
+{
+	PMIC_AUDIO_HANDLE handle;
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	audio_mixer_control.mixer_mono_adder = mode;
+	if (audio_mixer_control.codec_playback_active) {
+		handle = audio_mixer_control.voice_codec_handle;
+		// Use codec's handle to set balance
+		pmic_audio_output_enable_mono_adder(audio_mixer_control.
+						    voice_codec_handle, mode);
+	} else if (audio_mixer_control.stdac_playback_active) {
+		handle = audio_mixer_control.stdac_handle;
+		pmic_audio_output_enable_mono_adder(audio_mixer_control.
+						    stdac_handle, mode);
+		// Use STDac's handle to set balance
+	}
+	up(&audio_mixer_control.sem);
+	return 0;
+}
+
+EXPORT_SYMBOL(set_mixer_output_mono_adder);
+
+int get_mixer_output_mono_adder()
+{
+	int val;
+	val = audio_mixer_control.mixer_mono_adder;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_output_mono_adder);
+
+/*!
+  * This function sets the output device(s) in PMIC. It takes an
+  * ALSA value and modifies registers using PMIC-specific values.
+  *
+  * @param       handle  handle to the device already opened
+  * @param       src     Source connected to o/p device
+  * @param       dev     Output device to be enabled
+  * @param       enable  Enable or disable the device
+  *
+  */
+int set_mixer_output_device(PMIC_AUDIO_HANDLE handle, OUTPUT_SOURCE src,
+			    OUTPUT_DEVICES dev, bool enable)
+{
+	PMIC_AUDIO_OUTPUT_PORT port;
+	if (down_interruptible(&audio_mixer_control.sem))
+		return -EINTR;
+	if (!((src == CODEC_DIR_OUT) || (src == MIXER_OUT))) {
+		up(&audio_mixer_control.sem);
+		return -1;
+	}
+	if (handle != (PMIC_AUDIO_HANDLE) NULL) {
+		/* Invoked by playback stream */
+		if (audio_mixer_control.output_device & SOUND_MASK_PHONEOUT) {
+			audio_mixer_control.output_active[OP_EARPIECE] = 1;
+			pmic_audio_output_set_port(handle, MONO_SPEAKER);
+		} else {
+			audio_mixer_control.output_active[OP_EARPIECE] = 0;
+			pmic_audio_output_clear_port(handle, MONO_SPEAKER);
+		}
+		if (audio_mixer_control.output_device & SOUND_MASK_SPEAKER) {
+			audio_mixer_control.output_active[OP_HANDSFREE] = 1;
+			pmic_audio_output_set_port(handle, MONO_LOUDSPEAKER);
+		} else {
+			audio_mixer_control.output_active[OP_HANDSFREE] = 0;
+			pmic_audio_output_clear_port(handle, MONO_LOUDSPEAKER);
+		}
+		if (audio_mixer_control.output_device & SOUND_MASK_VOLUME) {
+			audio_mixer_control.output_active[OP_HEADSET] = 1;
+			if (dev != OP_MONO) {
+				pmic_audio_output_set_port(handle,
+							   STEREO_HEADSET_LEFT |
+							   STEREO_HEADSET_RIGHT);
+			} else {
+				pmic_audio_output_set_port(handle,
+							   STEREO_HEADSET_LEFT);
+				/*This is a temporary workaround which should be removed later */
+			}
+
+		} else {
+			audio_mixer_control.output_active[OP_HEADSET] = 0;
+			pmic_audio_output_clear_port(handle,
+						     STEREO_HEADSET_LEFT |
+						     STEREO_HEADSET_RIGHT);
+		}
+		if (audio_mixer_control.output_device & SOUND_MASK_PCM) {
+			audio_mixer_control.output_active[OP_LINEOUT] = 1;
+			pmic_audio_output_set_port(handle,
+						   STEREO_OUT_LEFT |
+						   STEREO_OUT_RIGHT);
+		} else {
+			audio_mixer_control.output_active[OP_LINEOUT] = 0;
+			pmic_audio_output_clear_port(handle,
+						     STEREO_OUT_LEFT |
+						     STEREO_OUT_RIGHT);
+		}
+	} else {
+		switch (dev) {
+		case OP_EARPIECE:
+			if (enable) {
+				audio_mixer_control.output_device |=
+				    SOUND_MASK_PHONEOUT;
+				audio_mixer_control.source_for_output[dev] =
+				    src;
+			} else {
+				audio_mixer_control.output_device &=
+				    ~SOUND_MASK_PHONEOUT;
+			}
+			port = MONO_SPEAKER;
+			break;
+		case OP_HANDSFREE:
+			if (enable) {
+				audio_mixer_control.output_device |=
+				    SOUND_MASK_SPEAKER;
+				audio_mixer_control.source_for_output[dev] =
+				    src;
+			} else {
+				audio_mixer_control.output_device &=
+				    ~SOUND_MASK_SPEAKER;
+			}
+			port = MONO_LOUDSPEAKER;
+			break;
+		case OP_HEADSET:
+			if (enable) {
+				audio_mixer_control.output_device |=
+				    SOUND_MASK_VOLUME;
+				audio_mixer_control.source_for_output[dev] =
+				    src;
+			} else {
+				audio_mixer_control.output_device &=
+				    ~SOUND_MASK_VOLUME;
+			}
+			port = STEREO_HEADSET_LEFT | STEREO_HEADSET_RIGHT;
+			break;
+		case OP_MONO:
+			/*This is a temporary workaround which should be removed later */
+			if (enable) {
+				audio_mixer_control.output_device |=
+				    SOUND_MASK_VOLUME;
+				audio_mixer_control.source_for_output[dev] =
+				    src;
+			} else {
+				audio_mixer_control.output_device &=
+				    ~SOUND_MASK_VOLUME;
+			}
+			port = STEREO_HEADSET_LEFT;
+			break;
+		case OP_LINEOUT:
+			if (enable) {
+				audio_mixer_control.output_device |=
+				    SOUND_MASK_PCM;
+				audio_mixer_control.source_for_output[dev] =
+				    src;
+			} else {
+				audio_mixer_control.output_device &=
+				    ~SOUND_MASK_PCM;
+			}
+			port = STEREO_OUT_LEFT | STEREO_OUT_RIGHT;
+			break;
+		default:
+			up(&audio_mixer_control.sem);
+			return -1;
+			break;
+		}
+		/* Invoked by mixer .. little tricky to handle over here */
+		if (audio_mixer_control.codec_playback_active) {
+			if (enable) {
+				audio_mixer_control.output_active[dev] = 1;
+				pmic_audio_output_set_port(audio_mixer_control.
+							   voice_codec_handle,
+							   port);
+			} else {
+				audio_mixer_control.output_active[dev] = 0;
+				pmic_audio_output_clear_port
+				    (audio_mixer_control.voice_codec_handle,
+				     port);
+			}
+		}
+		if (audio_mixer_control.stdac_playback_active) {
+			if (enable) {
+				audio_mixer_control.output_active[dev] = 1;
+				pmic_audio_output_set_port(audio_mixer_control.
+							   stdac_handle, port);
+			} else {
+				audio_mixer_control.output_active[dev] = 0;
+				pmic_audio_output_clear_port
+				    (audio_mixer_control.stdac_handle, port);
+			}
+		}
+
+	}
+	up(&audio_mixer_control.sem);
+	return 0;
+	// Set O/P device with handle and port
+
+}
+
+EXPORT_SYMBOL(set_mixer_output_device);
+
+int get_mixer_output_device()
+{
+	int val;
+	val = audio_mixer_control.output_device;
+	return val;
+}
+
+EXPORT_SYMBOL(get_mixer_output_device);
+
+/*!
+  * This function configures the CODEC for playback/recording.
+  *
+  * main configured elements are:
+  *	- audio path on PMIC
+  *	- external clock to generate BC and FS clocks
+  *	- PMIC mode (master or slave)
+  *	- protocol
+  *	- sample rate
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	stream_id	index into the audio_stream array.
+  */
+void configure_codec(struct snd_pcm_substream *substream, int stream_id)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	pmic_audio_device_t *pmic;
+	PMIC_AUDIO_HANDLE handle;
+	int ssi_bus;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[stream_id];
+	pmic = &s->pmic_audio_device;
+	handle = audio_mixer_control.voice_codec_handle;
+
+	ssi_bus = (pmic->ssi == SSI1) ? AUDIO_DATA_BUS_1 : AUDIO_DATA_BUS_2;
+
+	pmic_audio_vcodec_set_rxtx_timeslot(handle, USE_TS0);
+	pmic_audio_vcodec_enable_mixer(handle, USE_TS1, VCODEC_MIX_IN_0DB,
+				       VCODEC_MIX_OUT_0DB);
+	pmic_audio_set_protocol(handle, ssi_bus, pmic->protocol, pmic->mode,
+				USE_4_TIMESLOTS);
+
+	msleep(20);
+	pmic_audio_vcodec_set_clock(handle, pmic->pll, pmic->pll_rate,
+				    pmic->sample_rate, NO_INVERT);
+	msleep(20);
+	pmic_audio_vcodec_set_config(handle, VCODEC_MASTER_CLOCK_OUTPUTS);
+	pmic_audio_digital_filter_reset(handle);
+	msleep(15);
+	if (stream_id == 2) {
+		pmic_audio_output_enable_mixer(handle);
+		set_mixer_output_device(handle, MIXER_OUT, OP_NODEV, 1);
+		set_mixer_output_volume(handle,
+					audio_mixer_control.master_volume_out,
+					OP_HEADSET);
+	} else {
+		set_mixer_input_device(handle, IP_NODEV, 1);
+		set_mixer_input_gain(handle, audio_mixer_control.input_volume);
+	}
+	pmic_audio_enable(handle);
+}
+
+/*!
+  * This function configures the STEREODAC for playback/recording.
+  *
+  * main configured elements are:
+  *      - audio path on PMIC
+  *      - external clock to generate BC and FS clocks
+  *      - PMIC mode (master or slave)
+  *      - protocol
+  *      - sample rate
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  */
+void configure_stereodac(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	int stream_id;
+	audio_stream_t *s;
+	pmic_audio_device_t *pmic;
+	int ssi_bus;
+	PMIC_AUDIO_HANDLE handle;
+	struct snd_pcm_runtime *runtime;
+
+	chip = snd_pcm_substream_chip(substream);
+	stream_id = substream->pstr->stream;
+	s = &chip->s[stream_id];
+	pmic = &s->pmic_audio_device;
+	handle = pmic->handle;
+	runtime = substream->runtime;
+
+	if (runtime->channels == 1) {
+		audio_mixer_control.mixer_mono_adder = MONO_ADD_LEFT_RIGHT;
+	} else {
+		audio_mixer_control.mixer_mono_adder = MONO_ADDER_OFF;
+	}
+
+	ssi_bus = (pmic->ssi == SSI1) ? AUDIO_DATA_BUS_1 : AUDIO_DATA_BUS_2;
+	pmic_audio_stdac_set_rxtx_timeslot(handle, USE_TS0_TS1);
+	pmic_audio_stdac_enable_mixer(handle, USE_TS2_TS3, STDAC_NO_MIX,
+				      STDAC_MIX_OUT_0DB);
+#ifdef CONFIG_MXC_PMIC_SC55112
+	pmic_audio_set_protocol(handle, ssi_bus, pmic->protocol, pmic->mode,
+				USE_4_TIMESLOTS);
+#else
+	pmic_audio_set_protocol(handle, ssi_bus, pmic->protocol, pmic->mode,
+				USE_2_TIMESLOTS);
+#endif
+	pmic_audio_stdac_set_clock(handle, pmic->pll, pmic->pll_rate,
+				   pmic->sample_rate, NO_INVERT);
+
+	pmic_audio_stdac_set_config(handle, STDAC_MASTER_CLOCK_OUTPUTS);
+	pmic_audio_output_enable_mixer(handle);
+	audio_mixer_control.stdac_out_to_mixer = 1;
+	pmic_audio_digital_filter_reset(handle);
+	msleep(10);
+	pmic_audio_output_enable_phantom_ground();
+	set_mixer_output_volume(handle, audio_mixer_control.master_volume_out,
+				OP_HEADSET);
+	pmic_audio_output_enable_mono_adder(handle,
+					    audio_mixer_control.
+					    mixer_mono_adder);
+#ifdef CONFIG_HEADSET_DETECT_ENABLE
+	set_mixer_output_device(handle, MIXER_OUT, OP_MONO, 1);
+#else
+	set_mixer_output_device(handle, MIXER_OUT, OP_NODEV, 1);
+#endif
+	pmic_audio_enable(handle);
+
+}
+
+/*!
+  * This function disables CODEC's amplifiers, volume and clock.
+  * @param  handle  Handle of voice codec
+  */
+
+void disable_codec(PMIC_AUDIO_HANDLE handle)
+{
+	pmic_audio_disable(handle);
+	pmic_audio_vcodec_clear_config(handle, VCODEC_MASTER_CLOCK_OUTPUTS);
+}
+
+/*!
+  * This function disables STEREODAC's amplifiers, volume and clock.
+  * @param  handle  Handle of STdac
+  * @param
+  */
+
+void disable_stereodac(void)
+{
+
+	audio_mixer_control.stdac_out_to_mixer = 0;
+}
+
+/*!
+  * This function configures PMIC for recording.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return		0 on success, -1 otherwise.
+  */
+int configure_pmic_recording(struct snd_pcm_substream *substream)
+{
+
+	configure_codec(substream, 1);
+	return 0;
+}
+
+/*!
+  * This function configures PMIC for playing back.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	stream_id	Index into the audio_stream array .
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+
+int configure_pmic_playback(struct snd_pcm_substream *substream, int stream_id)
+{
+	if (stream_id == 0) {
+		configure_stereodac(substream);
+	} else if (stream_id == 2 || stream_id == 3) {
+		configure_codec(substream, stream_id);
+	}
+	return 0;
+}
+
+/*!
+  * This function shutsdown the PMIC soundcard.
+  * Nothing to be done here
+  *
+  * @param	mxc_audio	pointer to the sound card structure.
+  *
+  * @return
+  */
+/*
+static void mxc_pmic_audio_shutdown(mxc_pmic_audio_t * mxc_audio)
+{
+
+}
+*/
+
+/*!
+  * This function configures the DMA channel used to transfer
+  * audio from MCU to PMIC
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param       callback        pointer to function that will be
+  *                              called when a SDMA TX transfer finishes.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+configure_write_channel(audio_stream_t * s, mxc_dma_callback_t callback,
+			int stream_id)
+{
+	int ret = -1;
+	int channel = -1;
+#ifdef CONFIG_SND_MXC_PLAYBACK_MIXING
+
+	int channel1 = -1;
+#endif
+
+	if (stream_id == 0) {
+		if (audio_data->ssi_num == 2) {
+			channel =
+			    mxc_dma_request(MXC_DMA_SSI2_16BIT_TX0,
+					    "ALSA TX DMA");
+			ret =
+			    mxc_dma_callback_set(channel,
+						 (mxc_dma_callback_t) callback,
+						 (void *)s);
+			if (ret != 0) {
+				mxc_dma_free(channel);
+				return -1;
+			}
+			s->dma_wchannel = channel;
+
+		} else {
+			channel =
+			    mxc_dma_request(MXC_DMA_SSI1_16BIT_TX0,
+					    "ALSA TX DMA");
+			ret =
+			    mxc_dma_callback_set(channel,
+						 (mxc_dma_callback_t) callback,
+						 (void *)s);
+			if (ret != 0) {
+				mxc_dma_free(channel);
+				return -1;
+			}
+			s->dma_wchannel = channel;
+		}
+
+	}
+	if (stream_id == 3) {
+		channel =
+		    mxc_dma_request(MXC_DMA_SSI1_16BIT_TX0, "ALSA TX DMA");
+		if (channel < 0) {
+			pr_debug("error requesting a write dma channel\n");
+			return -1;
+		}
+		ret =
+		    mxc_dma_callback_set(channel, (mxc_dma_callback_t) callback,
+					 (void *)s);
+		if (ret != 0) {
+			mxc_dma_free(channel);
+
+			return -1;
+		}
+		s->dma_wchannel = channel;
+	}
+#ifdef CONFIG_SND_MXC_PLAYBACK_MIXING
+	else if (stream_id == 2) {
+		channel1 =
+		    mxc_dma_request(MXC_DMA_SSI1_16BIT_TX1, "ALSA TX DMA");
+		ret =
+		    mxc_dma_callback_set(channel1,
+					 (mxc_dma_callback_t) callback,
+					 (void *)s);
+		if (ret != 0) {
+			mxc_dma_free(channel1);
+			return -1;
+		}
+		s->dma_wchannel = channel1;
+	}
+#else
+
+	if (stream_id == 2) {
+		channel =
+		    mxc_dma_request(MXC_DMA_SSI1_16BIT_TX0, "ALSA TX DMA");
+		ret =
+		    mxc_dma_callback_set(channel, (mxc_dma_callback_t) callback,
+					 (void *)s);
+		if (ret != 0) {
+			mxc_dma_free(channel);
+			return -1;
+		}
+		s->dma_wchannel = channel;
+	}
+#endif
+	/*if (channel < 0) {
+	   pr_debug("error requesting a write dma channel\n");
+	   return -1;
+	   } */
+
+	return 0;
+}
+
+/*!
+  * This function configures the DMA channel used to transfer
+  * audio from PMIC to MCU
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param       callback        pointer to function that will be
+  *                              called when a SDMA RX transfer finishes.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int configure_read_channel(audio_stream_t * s,
+				  mxc_dma_callback_t callback)
+{
+	int ret = -1;
+	int channel = -1;
+
+	channel = mxc_dma_request(MXC_DMA_SSI1_16BIT_RX0, "ALSA RX DMA");
+	if (channel < 0) {
+		pr_debug("error requesting a read dma channel\n");
+		return -1;
+	}
+
+	ret =
+	    mxc_dma_callback_set(channel, (mxc_dma_callback_t) callback,
+				 (void *)s);
+	if (ret != 0) {
+		mxc_dma_free(channel);
+		return -1;
+	}
+	s->dma_wchannel = channel;
+
+	return 0;
+}
+
+/*!
+  * This function frees the stream structure
+  *
+  * @param	s	pointer to the structure of the current stream.
+  */
+static void audio_dma_free(audio_stream_t * s)
+{
+	/*
+	 * There is nothing to be done here since the dma channel has been
+	 * freed either in the callback or in the stop method
+	 */
+
+}
+
+/*!
+  * This function gets the dma pointer position during record.
+  * Our DMA implementation does not allow to retrieve this position
+  * when a transfert is active, so, it answers the middle of
+  * the current period beeing transfered
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static u_int audio_get_capture_dma_pos(audio_stream_t * s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int offset;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	offset = 0;
+
+	/* tx_spin value is used here to check if a transfert is active */
+	if (s->tx_spin) {
+		offset = (runtime->period_size * (s->periods)) + 0;
+		if (offset >= runtime->buffer_size)
+			offset = 0;
+		pr_debug("MXC: audio_get_dma_pos offset  %d\n", offset);
+	} else {
+		offset = (runtime->period_size * (s->periods));
+		if (offset >= runtime->buffer_size)
+			offset = 0;
+		pr_debug("MXC: audio_get_dma_pos BIS offset  %d\n", offset);
+	}
+
+	return offset;
+}
+
+/*!
+  * This function gets the dma pointer position during playback.
+  * Our DMA implementation does not allow to retrieve this position
+  * when a transfert is active, so, it answers the middle of
+  * the current period beeing transfered
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static u_int audio_get_playback_dma_pos(audio_stream_t * s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int offset;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	offset = 0;
+
+	/* tx_spin value is used here to check if a transfert is active */
+	if (s->tx_spin) {
+		offset = (runtime->period_size * (s->periods)) + 0;
+		if (offset >= runtime->buffer_size)
+			offset = 0;
+		pr_debug("MXC: audio_get_dma_pos offset  %d\n", offset);
+	} else {
+		offset = (runtime->period_size * (s->periods));
+		if (offset >= runtime->buffer_size)
+			offset = 0;
+		pr_debug("MXC: audio_get_dma_pos BIS offset  %d\n", offset);
+	}
+
+	return offset;
+}
+
+/*!
+  * This function is called whenever a new audio block needs to be
+  * transferred to PMIC. The function receives the address and the size
+  * of the new block and start a new DMA transfer.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static void audio_playback_dma(audio_stream_t * s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size = 0;
+	unsigned int offset;
+	int ret = 0;
+	mxc_dma_requestbuf_t dma_request;
+#ifdef CONFIG_SND_MXC_PLAYBACK_MIXING
+	unsigned int dma_size_mix = 0, offset_mix;
+	mxc_dma_requestbuf_t dma_request_mix;
+	int ret1 = 0;
+#endif
+	int device;
+	int stream_id;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	device = substream->pcm->device;
+	if (device == 0) {
+		stream_id = 0;
+	} else if (device == 1) {
+		stream_id = 2;
+	} else {
+		stream_id = 3;
+	}
+
+	pr_debug("\nDMA direction %d\(0 is playback 1 is capture)\n",
+		 s->stream_id);
+
+#ifndef CONFIG_SND_MXC_PLAYBACK_MIXING
+	memset(&dma_request, 0, sizeof(mxc_dma_requestbuf_t));
+
+#else
+	if (stream_id == 2) {
+		memset(&dma_request, 0, sizeof(mxc_dma_requestbuf_t));
+	} else if (stream_id == 3) {
+		memset(&dma_request_mix, 0, sizeof(mxc_dma_requestbuf_t));
+	}
+#endif
+	if (s->active) {
+		if (ssi_get_status(s->ssi) & (ssi_transmitter_underrun_0)) {
+			ssi_enable(s->ssi, false);
+			ssi_transmit_enable(s->ssi, false);
+			ssi_enable(s->ssi, true);
+		}
+#ifndef CONFIG_SND_MXC_PLAYBACK_MIXING
+
+		dma_size = frames_to_bytes(runtime, runtime->period_size);
+		pr_debug("s->period (%x) runtime->periods (%d)\n",
+			 s->period, runtime->periods);
+		pr_debug("runtime->period_size (%d) dma_size (%d)\n",
+			 (unsigned int)runtime->period_size,
+			 runtime->dma_bytes);
+
+		offset = dma_size * s->period;
+		if (snd_BUG_ON(dma_size > DMA_BUF_SIZE))
+			return;
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+
+		if (g_audio_iram_en && stream_id == 0) {
+			dma_request.src_addr = ADMA_BASE_PADDR + offset;
+		} else
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+		{
+
+			dma_request.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL, runtime->dma_area + offset,
+					   dma_size, DMA_TO_DEVICE));
+		}
+		if (stream_id == 0) {
+			dma_request.dst_addr =
+			    (dma_addr_t) get_ssi_fifo_addr(s->ssi, 1);
+		} else if (stream_id == 2) {
+			dma_request.dst_addr =
+			    (dma_addr_t) get_ssi_fifo_addr(s->ssi, 1);
+		}
+		dma_request.num_of_bytes = dma_size;
+		pr_debug("MXC: Start DMA offset (%d) size (%d)\n",
+			 offset, runtime->dma_bytes);
+
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_WRITE);
+		ret = mxc_dma_enable(s->dma_wchannel);
+		ssi_transmit_enable(s->ssi, true);
+		s->tx_spin = 1;	/* FGA little trick to retrieve DMA pos */
+
+		if (ret) {
+			pr_debug("audio_process_dma: cannot queue DMA buffer\
+								(%i)\n", ret);
+			return;
+		}
+		s->period++;
+		s->period %= runtime->periods;
+#else
+
+		if (stream_id == 2) {
+			dma_size =
+			    frames_to_bytes(runtime, runtime->period_size);
+			pr_debug("s->period (%x) runtime->periods (%d)\n",
+				 s->period, runtime->periods);
+			pr_debug("runtime->period_size (%d) dma_size (%d)\n",
+				 (unsigned int)runtime->period_size,
+				 runtime->dma_bytes);
+
+			offset = dma_size * s->period;
+			if (snd_BUG_ON(dma_size > DMA_BUF_SIZE))
+				return;
+
+			dma_request.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL, runtime->dma_area + offset,
+					   dma_size, DMA_TO_DEVICE));
+			dma_request.dst_addr =
+			    (dma_addr_t) get_ssi_fifo_addr(s->ssi, 1);
+			dma_request.num_of_bytes = dma_size;
+			pr_debug("MXC: Start DMA offset (%d) size (%d)\n",
+				 offset, runtime->dma_bytes);
+
+			mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+				       MXC_DMA_MODE_WRITE);
+			ret = mxc_dma_enable(s->dma_wchannel);
+			ssi_transmit_enable(s->ssi, true);
+			s->tx_spin = 1;	/* FGA little trick to retrieve DMA pos */
+
+			if (ret) {
+				pr_debug("audio_process_dma: cannot queue DMA buffer\
+								(%i)\n",
+					 ret);
+				return;
+			}
+			s->period++;
+			s->period %= runtime->periods;
+
+		} else if (stream_id == 3) {
+
+			dma_size_mix =
+			    frames_to_bytes(runtime, runtime->period_size);
+			pr_debug("s->period (%x) runtime->periods (%d)\n",
+				 s->period, runtime->periods);
+			pr_debug("runtime->period_size (%d) dma_size (%d)\n",
+				 (unsigned int)runtime->period_size,
+				 runtime->dma_bytes);
+
+			offset_mix = dma_size_mix * s->period;
+			if (snd_BUG_ON(dma_size_mix > DMA_BUF_SIZE))
+				return;
+			dma_request_mix.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL, runtime->dma_area + offset_mix,
+					   dma_size_mix, DMA_TO_DEVICE));
+			dma_request_mix.dst_addr =
+			    (dma_addr_t) get_ssi_fifo_addr(s->ssi, 1);
+			dma_request_mix.num_of_bytes = dma_size_mix;
+
+			pr_debug("MXC: Start DMA offset (%d) size (%d)\n",
+				 offset_mix, runtime->dma_bytes);
+
+			mxc_dma_config(s->dma_wchannel, &dma_request_mix, 1,
+				       MXC_DMA_MODE_WRITE);
+			ret1 = mxc_dma_enable(s->dma_wchannel);
+			ssi_transmit_enable(s->ssi, true);
+			s->tx_spin = 1;	/* FGA little trick to retrieve DMA pos */
+
+			if (ret1) {
+				pr_debug("audio_process_dma: cannot queue DMA buffer\
+								(%i)\n",
+					 ret1);
+				return;
+			}
+			s->period++;
+			s->period %= runtime->periods;
+
+		}
+#endif
+#ifdef  MXC_SOUND_PLAYBACK_CHAIN_DMA_EN
+
+		if ((s->period > s->periods) && ((s->period - s->periods) > 1)) {
+			pr_debug
+			    ("audio playback chain dma: already double buffered\n");
+			return;
+		}
+
+		if ((s->period < s->periods)
+		    && ((s->period + runtime->periods - s->periods) > 1)) {
+			pr_debug
+			    ("audio playback chain dma: already double buffered\n");
+			return;
+		}
+
+		if (s->period == s->periods) {
+			pr_debug
+			    ("audio playback chain dma: s->period == s->periods\n");
+			return;
+		}
+
+		if (snd_pcm_playback_hw_avail(runtime) <
+		    2 * runtime->period_size) {
+			pr_debug
+			    ("audio playback chain dma: available data is not enough\n");
+			return;
+		}
+
+		pr_debug
+		    ("audio playback chain dma:to set up the 2nd dma buffer\n");
+
+#ifndef CONFIG_SND_MXC_PLAYBACK_MIXING
+		offset = dma_size * s->period;
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+		if (g_audio_iram_en && stream_id == 0) {
+			dma_request.src_addr = ADMA_BASE_PADDR + offset;
+		} else
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+		{
+
+			dma_request.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL, runtime->dma_area + offset,
+					   dma_size, DMA_TO_DEVICE));
+		}
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_WRITE);
+#else
+		if (stream_id == 3) {
+			offset_mix = dma_size_mix * s->period;
+			dma_request.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL,
+					   runtime->dma_area + offset_mix,
+					   dma_size, DMA_TO_DEVICE));
+
+			mxc_dma_config(s->dma_wchannel, &dma_request_mix, 1,
+				       MXC_DMA_MODE_WRITE);
+		} else {
+			offset = dma_size * s->period;
+			dma_request.src_addr =
+			    (dma_addr_t) (dma_map_single
+					  (NULL,
+					   runtime->dma_area + offset,
+					   dma_size, DMA_TO_DEVICE));
+
+			mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+				       MXC_DMA_MODE_WRITE);
+		}
+
+#endif
+		ret = mxc_dma_enable(s->dma_wchannel);
+
+		s->period++;
+		s->period %= runtime->periods;
+#endif				/* MXC_SOUND_PLAYBACK_CHAIN_DMA_EN */
+	}
+}
+
+/*!
+  * This function is called whenever a new audio block needs to be
+  * transferred from PMIC. The function receives the address and the size
+  * of the block that will store the audio samples and start a new DMA transfer.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static void audio_capture_dma(audio_stream_t * s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int offset;
+	int ret = 0;
+	mxc_dma_requestbuf_t dma_request;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+
+	pr_debug("\nDMA direction %d\
+		(0 is playback 1 is capture)\n", s->stream_id);
+
+	memset(&dma_request, 0, sizeof(mxc_dma_requestbuf_t));
+
+	if (s->active) {
+		dma_size = frames_to_bytes(runtime, runtime->period_size);
+		pr_debug("s->period (%x) runtime->periods (%d)\n",
+			 s->period, runtime->periods);
+		pr_debug("runtime->period_size (%d) dma_size (%d)\n",
+			 (unsigned int)runtime->period_size,
+			 runtime->dma_bytes);
+
+		offset = dma_size * s->period;
+		snd_BUG_ON(dma_size > DMA_BUF_SIZE);
+
+		dma_request.dst_addr = (dma_addr_t) (dma_map_single(NULL,
+								    runtime->
+								    dma_area +
+								    offset,
+								    dma_size,
+								    DMA_FROM_DEVICE));
+		dma_request.src_addr =
+		    (dma_addr_t) get_ssi_fifo_addr(s->ssi, 0);
+		dma_request.num_of_bytes = dma_size;
+
+		pr_debug("MXC: Start DMA offset (%d) size (%d)\n", offset,
+			 runtime->dma_bytes);
+
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_READ);
+		ret = mxc_dma_enable(s->dma_wchannel);
+
+		s->tx_spin = 1;	/* FGA little trick to retrieve DMA pos */
+
+		if (ret) {
+			pr_debug("audio_process_dma: cannot queue DMA buffer\
+								(%i)\n", ret);
+			return;
+		}
+		s->period++;
+		s->period %= runtime->periods;
+
+#ifdef MXC_SOUND_CAPTURE_CHAIN_DMA_EN
+		if ((s->period > s->periods) && ((s->period - s->periods) > 1)) {
+			pr_debug
+			    ("audio capture chain dma: already double buffered\n");
+			return;
+		}
+
+		if ((s->period < s->periods)
+		    && ((s->period + runtime->periods - s->periods) > 1)) {
+			pr_debug
+			    ("audio capture chain dma: already double buffered\n");
+			return;
+		}
+
+		if (s->period == s->periods) {
+			pr_debug
+			    ("audio capture chain dma: s->period == s->periods\n");
+			return;
+		}
+
+		if (snd_pcm_capture_hw_avail(runtime) <
+		    2 * runtime->period_size) {
+			pr_debug
+			    ("audio capture chain dma: available data is not enough\n");
+			return;
+		}
+
+		pr_debug
+		    ("audio capture chain dma:to set up the 2nd dma buffer\n");
+		offset = dma_size * s->period;
+		dma_request.dst_addr = (dma_addr_t) (dma_map_single(NULL,
+								    runtime->
+								    dma_area +
+								    offset,
+								    dma_size,
+								    DMA_FROM_DEVICE));
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_READ);
+		ret = mxc_dma_enable(s->dma_wchannel);
+
+		s->period++;
+		s->period %= runtime->periods;
+#endif				/* MXC_SOUND_CAPTURE_CHAIN_DMA_EN */
+	}
+}
+
+/*!
+  * This is a callback which will be called
+  * when a TX transfer finishes. The call occurs
+  * in interrupt context.
+  *
+  * @param	dat	pointer to the structure of the current stream.
+  *
+  */
+static void audio_playback_dma_callback(void *data, int error,
+					unsigned int count)
+{
+	audio_stream_t *s;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int previous_period;
+	unsigned int offset;
+
+	s = data;
+	substream = s->stream;
+	runtime = substream->runtime;
+	previous_period = s->periods;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * previous_period;
+
+	s->tx_spin = 0;
+	s->periods++;
+	s->periods %= runtime->periods;
+
+	/*
+	 * Give back to the CPU the access to the non cached memory
+	 */
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_TO_DEVICE);
+
+	/*
+	 * If we are getting a callback for an active stream then we inform
+	 * the PCM middle layer we've finished a period
+	 */
+	if (s->active)
+		snd_pcm_period_elapsed(s->stream);
+	spin_lock(&s->dma_lock);
+
+	/*
+	 * Trig next DMA transfer
+	 */
+	audio_playback_dma(s);
+
+	spin_unlock(&s->dma_lock);
+
+}
+
+/*!
+  * This is a callback which will be called
+  * when a RX transfer finishes. The call occurs
+  * in interrupt context.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static void audio_capture_dma_callback(void *data, int error,
+				       unsigned int count)
+{
+	audio_stream_t *s;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int previous_period;
+	unsigned int offset;
+
+	s = data;
+	substream = s->stream;
+	runtime = substream->runtime;
+	previous_period = s->periods;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * previous_period;
+
+	s->tx_spin = 0;
+	s->periods++;
+	s->periods %= runtime->periods;
+
+	/*
+	 * Give back to the CPU the access to the non cached memory
+	 */
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_FROM_DEVICE);
+
+	/*
+	 * If we are getting a callback for an active stream then we inform
+	 * the PCM middle layer we've finished a period
+	 */
+	if (s->active)
+		snd_pcm_period_elapsed(s->stream);
+
+	spin_lock(&s->dma_lock);
+
+	/*
+	 * Trig next DMA transfer
+	 */
+	audio_capture_dma(s);
+
+	spin_unlock(&s->dma_lock);
+
+}
+
+/*!
+  * This function is a dispatcher of command to be executed
+  * by the driver for playback.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	cmd		command to be executed
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+snd_mxc_audio_playback_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	mxc_pmic_audio_t *chip;
+	int stream_id;
+	audio_stream_t *s;
+	int err;
+	int device;
+	device = substream->pcm->device;
+	if (device == 0) {
+		stream_id = 0;
+	} else if (device == 1) {
+		stream_id = 2;
+	} else {
+		stream_id = 3;
+	}
+
+	chip = snd_pcm_substream_chip(substream);
+	//stream_id = substream->pstr->stream;
+	s = &chip->s[stream_id];
+	err = 0;
+
+	/* note local interrupts are already disabled in the midlevel code */
+	spin_lock(&s->dma_lock);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		s->tx_spin = 0;
+		s->active = 1;
+		audio_playback_dma(s);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		s->active = 0;
+		break;
+	default:
+		err = -EINVAL;
+		break;
+	}
+	spin_unlock(&s->dma_lock);
+	return err;
+}
+
+/*!
+  * This function is a dispatcher of command to be executed
+  * by the driver for capture.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	cmd		command to be executed
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+snd_mxc_audio_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	mxc_pmic_audio_t *chip;
+	int stream_id;
+	audio_stream_t *s;
+	int err;
+
+	chip = snd_pcm_substream_chip(substream);
+	stream_id = substream->pstr->stream;
+	s = &chip->s[stream_id];
+	err = 0;
+
+	/* note local interrupts are already disabled in the midlevel code */
+	spin_lock(&s->dma_lock);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		s->tx_spin = 0;
+		s->active = 1;
+		audio_capture_dma(s);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		s->active = 0;
+		break;
+	default:
+		err = -EINVAL;
+		break;
+	}
+	spin_unlock(&s->dma_lock);
+	return err;
+}
+
+/*!
+  * This function configures the hardware to allow audio
+  * playback operations. It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_playback_prepare(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	int ssi;
+	int device = -1, stream_id = -1;
+
+	device = substream->pcm->device;
+	if (device == 0)
+		stream_id = 0;
+	else if (device == 1)
+		stream_id = 2;
+	else if (device == 2)
+		stream_id = 3;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[stream_id];
+	ssi = s->ssi;
+
+	normalize_speed_for_pmic(substream);
+
+	configure_dam_pmic_master(ssi);
+
+	configure_ssi_tx(substream);
+
+	ssi_interrupt_enable(ssi, ssi_tx_dma_interrupt_enable);
+	ssi_interrupt_enable(ssi, ssi_tx_interrupt_enable);
+
+	if (configure_pmic_playback(substream, stream_id) == -1)
+		pr_debug(KERN_ERR "MXC: PMIC Playback Config FAILED\n");
+	ssi_interrupt_enable(ssi, ssi_tx_fifo_0_empty);
+	ssi_interrupt_enable(ssi, ssi_tx_fifo_1_empty);
+	/*
+	   ssi_transmit_enable(ssi, true);
+	 */
+	msleep(20);
+	set_pmic_channels(substream);
+	s->period = 0;
+	s->periods = 0;
+
+	msleep(100);
+
+	return 0;
+}
+
+/*!
+  * This function gets the current capture pointer position.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static
+snd_pcm_uframes_t snd_mxc_audio_capture_pointer(struct snd_pcm_substream
+						*substream)
+{
+	mxc_pmic_audio_t *chip;
+
+	chip = snd_pcm_substream_chip(substream);
+	return audio_get_capture_dma_pos(&chip->s[substream->pstr->stream]);
+}
+
+/*!
+  * This function gets the current playback pointer position.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static snd_pcm_uframes_t
+snd_mxc_audio_playback_pointer(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	int device;
+	int stream_id;
+	device = substream->pcm->device;
+	if (device == 0)
+		stream_id = 0;
+	else if (device == 1)
+		stream_id = 2;
+	else
+		stream_id = 3;
+	chip = snd_pcm_substream_chip(substream);
+	return audio_get_playback_dma_pos(&chip->s[stream_id]);
+}
+
+/*!
+  * This structure reprensents the capabilities of the driver
+  * in capture mode.
+  * It is used by ALSA framework.
+  */
+static struct snd_pcm_hardware snd_mxc_pmic_capture = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
+	.rate_min = 8000,
+	.rate_max = 16000,
+	.channels_min = 1,
+	.channels_max = 1,
+	.buffer_bytes_max = MAX_BUFFER_SIZE,
+	.period_bytes_min = MIN_PERIOD_SIZE,
+	.period_bytes_max = DMA_BUF_SIZE,
+	.periods_min = MIN_PERIOD,
+	.periods_max = MAX_PERIOD,
+	.fifo_size = 0,
+
+};
+
+/*!
+  * This structure reprensents the capabilities of the driver
+  * in playback mode for ST-Dac.
+  * It is used by ALSA framework.
+  */
+static struct snd_pcm_hardware snd_mxc_pmic_playback_stereo = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = (SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS),
+	.rate_min = 8000,
+	.rate_max = 96000,
+	.channels_min = 1,
+	.channels_max = 2,
+	.buffer_bytes_max = MAX_BUFFER_SIZE,
+	.period_bytes_min = MIN_PERIOD_SIZE,
+	.period_bytes_max = DMA_BUF_SIZE,
+	.periods_min = MIN_PERIOD,
+	.periods_max = MAX_PERIOD,
+	.fifo_size = 0,
+
+};
+
+/*!
+  * This structure reprensents the capabilities of the driver
+  * in playback mode for Voice-codec.
+  * It is used by ALSA framework.
+  */
+static struct snd_pcm_hardware snd_mxc_pmic_playback_mono = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000),
+	.rate_min = 8000,
+	.rate_max = 16000,
+	.channels_min = 1,
+	.channels_max = 1,
+	.buffer_bytes_max = MAX_BUFFER_SIZE,
+	.period_bytes_min = MIN_PERIOD_SIZE,
+	.period_bytes_max = DMA_BUF_SIZE,
+	.periods_min = MIN_PERIOD,
+	.periods_max = MAX_PERIOD,
+	.fifo_size = 0,
+
+};
+
+/*!
+  * This function opens a PMIC audio device in playback mode
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_audio_playback_open(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	struct snd_pcm_runtime *runtime;
+	int stream_id = -1;
+	int err;
+	audio_stream_t *s;
+	PMIC_AUDIO_HANDLE temp_handle;
+	int device = -1;
+
+	device = substream->pcm->device;
+
+	chip = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+	if (device == 0)
+		stream_id = 0;
+	else if (device == 1)
+		stream_id = 2;
+	else if (device == 2) {
+		stream_id = 3;
+	}
+
+	s = &chip->s[stream_id];
+	err = -1;
+
+	if (stream_id == 0) {
+		if ((audio_data->ssi_num == 1)
+		    && (audio_mixer_control.codec_playback_active
+			|| audio_mixer_control.codec_capture_active)) {
+			return -EBUSY;
+		}
+
+		if (PMIC_SUCCESS == pmic_audio_open(&temp_handle, STEREO_DAC)) {
+			audio_mixer_control.stdac_handle = temp_handle;
+			audio_mixer_control.stdac_playback_active = 1;
+			chip->s[stream_id].pmic_audio_device.handle =
+			    temp_handle;
+		} else {
+			return -EBUSY;
+		}
+	} else if (stream_id == 2) {
+		if ((audio_data->ssi_num == 1)
+		    && (audio_mixer_control.stdac_playback_active)) {
+			return -EBUSY;
+		}
+
+		audio_mixer_control.codec_playback_active = 1;
+		if (PMIC_SUCCESS == pmic_audio_open(&temp_handle, VOICE_CODEC)) {
+			audio_mixer_control.voice_codec_handle = temp_handle;
+			chip->s[stream_id].pmic_audio_device.handle =
+			    temp_handle;
+		} else {
+			if (audio_mixer_control.codec_capture_active) {
+				temp_handle =
+				    audio_mixer_control.voice_codec_handle;
+			} else {
+				return -EBUSY;
+			}
+		}
+
+	} else if (stream_id == 3) {
+		audio_mixer_control.mixing_active = 1;
+
+	}
+
+	pmic_audio_antipop_enable(ANTI_POP_RAMP_SLOW);
+	msleep(250);
+
+	chip->s[stream_id].stream = substream;
+
+	if (stream_id == 0)
+		runtime->hw = snd_mxc_pmic_playback_stereo;
+	else if (stream_id == 2)
+		runtime->hw = snd_mxc_pmic_playback_mono;
+
+	else if (stream_id == 3) {
+		runtime->hw = snd_mxc_pmic_playback_mono;
+
+		if ((err = snd_pcm_hw_constraint_list(runtime, 0,
+						      SNDRV_PCM_HW_PARAM_RATE,
+						      &hw_playback_rates_mono))
+		    < 0)
+			return err;
+	}
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	if (g_audio_iram_en && stream_id == 0) {
+		runtime->hw.buffer_bytes_max = MAX_IRAM_SIZE;
+		runtime->hw.period_bytes_max = DMA_IRAM_SIZE;
+	}
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+
+	if ((err = snd_pcm_hw_constraint_integer(runtime,
+						 SNDRV_PCM_HW_PARAM_PERIODS)) <
+	    0)
+		goto exit_err;
+	if (stream_id == 0) {
+		if ((err = snd_pcm_hw_constraint_list(runtime, 0,
+						      SNDRV_PCM_HW_PARAM_RATE,
+						      &hw_playback_rates_stereo))
+		    < 0)
+			goto exit_err;
+
+	} else if (stream_id == 2) {
+		if ((err = snd_pcm_hw_constraint_list(runtime, 0,
+						      SNDRV_PCM_HW_PARAM_RATE,
+						      &hw_playback_rates_mono))
+		    < 0)
+			goto exit_err;
+	}
+	msleep(10);
+
+	/* setup DMA controller for playback */
+	if ((err =
+	     configure_write_channel(&mxc_audio->s[stream_id],
+				     audio_playback_dma_callback,
+				     stream_id)) < 0)
+		goto exit_err;
+
+	/* enable ssi clock */
+	clk_enable(audio_data->ssi_clk[s->ssi]);
+
+	return 0;
+      exit_err:
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	if (stream_id == 0)
+		mxc_snd_pcm_iram_put();
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+	return err;
+
+}
+
+/*!
+  * This function closes an PMIC audio device for playback.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_audio_playback_close(struct snd_pcm_substream
+					     *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	PMIC_AUDIO_HANDLE handle;
+	int ssi;
+	int device, stream_id = -1;
+	handle = (PMIC_AUDIO_HANDLE) NULL;
+	device = substream->pcm->device;
+	if (device == 0) {
+		stream_id = 0;
+	} else if (device == 1) {
+		stream_id = 2;
+	} else
+		stream_id = 3;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[stream_id];
+	ssi = s->ssi;
+
+	if (audio_mixer_control.mixing_active == 1) {
+		goto End;
+
+	} else {
+
+		if (stream_id == 0) {
+			disable_stereodac();
+			audio_mixer_control.stdac_playback_active = 0;
+			handle = audio_mixer_control.stdac_handle;
+			audio_mixer_control.stdac_handle = NULL;
+			chip->s[stream_id].pmic_audio_device.handle = NULL;
+		} else if ((stream_id == 2) || (stream_id == 3)) {
+
+			audio_mixer_control.codec_playback_active = 0;
+			handle = audio_mixer_control.voice_codec_handle;
+			disable_codec(handle);
+			audio_mixer_control.voice_codec_handle = NULL;
+			chip->s[stream_id].pmic_audio_device.handle = NULL;
+		}
+
+	}
+	pmic_audio_close(handle);
+
+	ssi_transmit_enable(ssi, false);
+	ssi_interrupt_disable(ssi, ssi_tx_dma_interrupt_enable);
+	ssi_tx_fifo_enable(ssi, ssi_fifo_0, false);
+	ssi_enable(ssi, false);
+	mxc_dma_free((mxc_audio->s[stream_id]).dma_wchannel);
+
+	chip->s[stream_id].stream = NULL;
+      End:
+	audio_mixer_control.mixing_active = 0;
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	if (stream_id == 0)
+		mxc_snd_pcm_iram_put();
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+	/* disable ssi clock */
+	clk_disable(audio_data->ssi_clk[ssi]);
+
+	return 0;
+}
+
+/*!
+  * This function closes a PMIC audio device for capture.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_audio_capture_close(struct snd_pcm_substream *substream)
+{
+	PMIC_AUDIO_HANDLE handle;
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	int ssi;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[substream->pstr->stream];
+	ssi = s->ssi;
+
+	audio_mixer_control.codec_capture_active = 0;
+	handle = audio_mixer_control.voice_codec_handle;
+	disable_codec(handle);
+	audio_mixer_control.voice_codec_handle = NULL;
+	chip->s[SNDRV_PCM_STREAM_CAPTURE].pmic_audio_device.handle = NULL;
+
+	pmic_audio_close(handle);
+
+	ssi_receive_enable(ssi, false);
+	ssi_interrupt_disable(ssi, ssi_rx_dma_interrupt_enable);
+	ssi_rx_fifo_enable(ssi, ssi_fifo_0, false);
+	ssi_enable(ssi, false);
+	mxc_dma_free((mxc_audio->s[1]).dma_wchannel);
+
+	chip->s[substream->pstr->stream].stream = NULL;
+
+	/* disable ssi clock */
+	clk_disable(audio_data->ssi_clk[ssi]);
+
+	return 0;
+}
+
+/*!
+  * This function configure the Audio HW in terms of memory allocation.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_hw_params(struct snd_pcm_substream *substream,
+				   struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_pcm_runtime *runtime;
+	int ret = 0, size;
+	int device, stream_id = -1;
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	struct snd_dma_buffer *dmab;
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+
+	runtime = substream->runtime;
+	ret =
+	    snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	if (ret < 0)
+		return ret;
+	size = params_buffer_bytes(hw_params);
+	device = substream->pcm->device;
+	if (device == 0)
+		stream_id = 0;
+	else if (device == 1)
+		stream_id = 2;
+
+	runtime->dma_addr = virt_to_phys(runtime->dma_area);
+
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	if ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) && g_audio_iram_en
+	    && stream_id == 0) {
+		if (runtime->dma_buffer_p
+		    && (runtime->dma_buffer_p != &g_iram_dmab)) {
+			snd_pcm_lib_free_pages(substream);
+		}
+		dmab = &g_iram_dmab;
+		dmab->dev = substream->dma_buffer.dev;
+		dmab->area = (char *)ADMA_BASE_VADDR;
+		dmab->addr = ADMA_BASE_PADDR;
+		dmab->bytes = size;
+		snd_pcm_set_runtime_buffer(substream, dmab);
+		runtime->dma_bytes = size;
+	} else
+#endif				/* CONFIG_SND_MXC_PMIC_IRAM */
+	{
+		ret = snd_pcm_lib_malloc_pages(substream, size);
+		if (ret < 0)
+			return ret;
+
+		runtime->dma_addr = virt_to_phys(runtime->dma_area);
+	}
+
+	pr_debug("MXC: snd_mxc_audio_hw_params runtime->dma_addr 0x(%x)\n",
+		 (unsigned int)runtime->dma_addr);
+	pr_debug("MXC: snd_mxc_audio_hw_params runtime->dma_area 0x(%x)\n",
+		 (unsigned int)runtime->dma_area);
+	pr_debug("MXC: snd_mxc_audio_hw_params runtime->dma_bytes 0x(%x)\n",
+		 (unsigned int)runtime->dma_bytes);
+
+	return ret;
+}
+
+/*!
+  * This function frees the audio hardware at the end of playback/capture.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_hw_free(struct snd_pcm_substream *substream)
+{
+#ifdef  CONFIG_SND_MXC_PMIC_IRAM
+	if (substream->runtime->dma_buffer_p == &g_iram_dmab) {
+		snd_pcm_set_runtime_buffer(substream, NULL);
+		return 0;
+	} else
+#endif				/* CONFIG_SND_MXC_PMIC_IRAM */
+	{
+		return snd_pcm_lib_free_pages(substream);
+	}
+	return 0;
+}
+
+/*!
+  * This function configures the hardware to allow audio
+  * capture operations. It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_capture_prepare(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	audio_stream_t *s;
+	int ssi;
+
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[substream->pstr->stream];
+	ssi = s->ssi;
+
+	normalize_speed_for_pmic(substream);
+
+	pr_debug("substream->pstr->stream %d\n", substream->pstr->stream);
+	pr_debug("SSI %d\n", ssi + 1);
+	configure_dam_pmic_master(ssi);
+
+	configure_ssi_rx(substream);
+
+	ssi_interrupt_enable(ssi, ssi_rx_dma_interrupt_enable);
+
+	if (configure_pmic_recording(substream) == -1)
+		pr_debug(KERN_ERR "MXC: PMIC Record Config FAILED\n");
+
+	ssi_interrupt_enable(ssi, ssi_rx_fifo_0_full);
+	ssi_receive_enable(ssi, true);
+
+	msleep(20);
+	set_pmic_channels(substream);
+
+	s->period = 0;
+	s->periods = 0;
+
+	return 0;
+}
+
+/*!
+  * This function opens an PMIC audio device in capture mode
+  * on Codec.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_audio_capture_open(struct snd_pcm_substream *substream)
+{
+	mxc_pmic_audio_t *chip;
+	struct snd_pcm_runtime *runtime;
+	int stream_id;
+	int err;
+	PMIC_AUDIO_HANDLE temp_handle;
+	audio_stream_t *s;
+
+	chip = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+	stream_id = substream->pstr->stream;
+	s = &chip->s[stream_id];
+	err = -1;
+
+	if ((audio_data->ssi_num == 1)
+	    && (audio_mixer_control.stdac_playback_active)) {
+		return -EBUSY;
+	}
+	if (PMIC_SUCCESS == pmic_audio_open(&temp_handle, VOICE_CODEC)) {
+		audio_mixer_control.voice_codec_handle = temp_handle;
+		audio_mixer_control.codec_capture_active = 1;
+		chip->s[SNDRV_PCM_STREAM_CAPTURE].pmic_audio_device.handle =
+		    temp_handle;
+	} else {
+		if (audio_mixer_control.codec_playback_active) {
+			temp_handle = audio_mixer_control.voice_codec_handle;
+		} else {
+			return -EBUSY;
+		}
+	}
+	pmic_audio_antipop_enable(ANTI_POP_RAMP_SLOW);
+
+	chip->s[stream_id].stream = substream;
+
+	if (stream_id == SNDRV_PCM_STREAM_CAPTURE) {
+		runtime->hw = snd_mxc_pmic_capture;
+	} else {
+		return err;
+	}
+
+	if ((err = snd_pcm_hw_constraint_integer(runtime,
+						 SNDRV_PCM_HW_PARAM_PERIODS)) <
+	    0) {
+		return err;
+	}
+
+	if ((err = snd_pcm_hw_constraint_list(runtime, 0,
+					      SNDRV_PCM_HW_PARAM_RATE,
+					      &hw_capture_rates)) < 0) {
+		return err;
+	}
+
+	/* setup DMA controller for Record */
+	err = configure_read_channel(&mxc_audio->s[SNDRV_PCM_STREAM_CAPTURE],
+				     audio_capture_dma_callback);
+	if (err < 0) {
+		return err;
+	}
+
+	/* enable ssi clock */
+	clk_enable(audio_data->ssi_clk[s->ssi]);
+
+	msleep(50);
+
+	return 0;
+}
+
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+static struct page *snd_mxc_audio_playback_nopage(struct vm_area_struct *area,
+						  unsigned long address,
+						  int *type)
+{
+	struct snd_pcm_substream *substream = area->vm_private_data;
+	struct snd_pcm_runtime *runtime;
+	unsigned long offset;
+	struct page *page;
+	void *vaddr;
+	size_t dma_bytes;
+
+	if (substream == NULL)
+		return NOPAGE_OOM;
+	runtime = substream->runtime;
+	if (g_audio_iram_en) {
+		return NOPAGE_SIGBUS;
+	}
+	offset = area->vm_pgoff << PAGE_SHIFT;
+	offset += address - area->vm_start;
+	if (snd_BUG_ON(offset % PAGE_SIZE) != 0)
+		return NOPAGE_OOM;
+	dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
+	if (offset > dma_bytes - PAGE_SIZE)
+		return NOPAGE_SIGBUS;
+	if (substream->ops->page) {
+		page = substream->ops->page(substream, offset);
+		if (!page)
+			return NOPAGE_OOM;
+	} else {
+		vaddr = runtime->dma_area + offset;
+		page = virt_to_page(vaddr);
+	}
+	get_page(page);
+	if (type)
+		*type = VM_FAULT_MINOR;
+	return page;
+}
+
+static struct vm_operations_struct snd_mxc_audio_playback_vm_ops = {
+	.open = snd_pcm_mmap_data_open,
+	.close = snd_pcm_mmap_data_close,
+	.nopage = snd_mxc_audio_playback_nopage,
+};
+
+#ifdef CONFIG_ARCH_MX3
+static inline int snd_mxc_set_pte_attr(struct mm_struct *mm,
+				       pmd_t * pmd,
+				       unsigned long addr, unsigned long end)
+{
+
+	pte_t *pte;
+	spinlock_t *ptl;
+	pte = pte_alloc_map_lock(mm, pmd, addr, &ptl);
+
+	if (!pte)
+		return -ENOMEM;
+	do {
+		BUG_ON(pte_none(*pte));	//The mapping is created. It should not be none.
+		*(pte - 512) |= 0x83;	//Directly modify to non-shared device
+	} while (pte++, addr += PAGE_SIZE, addr != end);
+
+	pte_unmap_unlock(pte - 1, ptl);
+
+	return 0;
+
+}
+
+static int snd_mxc_set_pmd_attr(struct mm_struct *mm,
+				pud_t * pud,
+				unsigned long addr, unsigned long end)
+{
+
+	pmd_t *pmd;
+	unsigned long next;
+	pmd = pmd_alloc(mm, pud, addr);
+
+	if (!pmd)
+		return -ENOMEM;
+	do {
+
+		next = pmd_addr_end(addr, end);
+		if (snd_mxc_set_pte_attr(mm, pmd, addr, next))
+			return -ENOMEM;
+
+	} while (pmd++, addr = next, addr != end);
+
+	return 0;
+
+}
+
+static int snd_mxc_set_pud_attr(struct mm_struct *mm,
+				pgd_t * pgd,
+				unsigned long addr, unsigned long end)
+{
+
+	pud_t *pud;
+	unsigned long next;
+	pud = pud_alloc(mm, pgd, addr);
+
+	if (!pud)
+		return -ENOMEM;
+	do {
+
+		next = pud_addr_end(addr, end);
+		if (snd_mxc_set_pmd_attr(mm, pud, addr, next))
+			return -ENOMEM;
+
+	} while (pud++, addr = next, addr != end);
+
+	return 0;
+
+}
+
+static inline int snd_mxc_set_pgd_attr(struct vm_area_struct *area)
+{
+
+	int ret = 0;
+	pgd_t *pgd;
+	struct mm_struct *mm = current->mm;
+	unsigned long next, addr = area->vm_start;
+
+	pgd = pgd_offset(mm, addr);
+	flush_cache_range(area, addr, area->vm_end);
+
+	do {
+		if (!pgd_present(*pgd))
+			return -1;
+
+		next = pgd_addr_end(addr, area->vm_end);
+		if ((ret = snd_mxc_set_pud_attr(mm, pgd, addr, next)))
+			break;
+
+	} while (pgd++, addr = next, addr != area->vm_end);
+
+	return ret;
+
+}
+
+#else
+#define snd_mxc_set_page_attr()  (0)
+#endif
+
+static int snd_mxc_audio_playback_mmap(struct snd_pcm_substream *substream,
+				       struct vm_area_struct *area)
+{
+	int ret = 0;
+	area->vm_ops = &snd_mxc_audio_playback_vm_ops;
+	area->vm_private_data = substream;
+	if (g_audio_iram_en) {
+		unsigned long off = area->vm_pgoff << PAGE_SHIFT;
+		unsigned long phys = ADMA_BASE_PADDR + off;
+		unsigned long size = area->vm_end - area->vm_start;
+		if (off + size > MAX_IRAM_SIZE) {
+			return -EINVAL;
+		}
+		area->vm_page_prot = pgprot_nonshareddev(area->vm_page_prot);
+		area->vm_flags |= VM_IO;
+		ret =
+		    remap_pfn_range(area, area->vm_start, phys >> PAGE_SHIFT,
+				    size, area->vm_page_prot);
+		if (ret == 0) {
+			ret = snd_mxc_set_pgd_attr(area);
+		}
+
+	} else {
+		area->vm_flags |= VM_RESERVED;
+	}
+	if (ret == 0)
+		area->vm_ops->open(area);
+	return ret;
+}
+
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+
+/*!
+  * This structure is the list of operation that the driver
+  * must provide for the capture interface
+  */
+static struct snd_pcm_ops snd_card_mxc_audio_capture_ops = {
+	.open = snd_card_mxc_audio_capture_open,
+	.close = snd_card_mxc_audio_capture_close,
+	.ioctl = snd_pcm_lib_ioctl,
+	.hw_params = snd_mxc_audio_hw_params,
+	.hw_free = snd_mxc_audio_hw_free,
+	.prepare = snd_mxc_audio_capture_prepare,
+	.trigger = snd_mxc_audio_capture_trigger,
+	.pointer = snd_mxc_audio_capture_pointer,
+};
+
+/*!
+  * This structure is the list of operation that the driver
+  * must provide for the playback interface
+  */
+static struct snd_pcm_ops snd_card_mxc_audio_playback_ops = {
+	.open = snd_card_mxc_audio_playback_open,
+	.close = snd_card_mxc_audio_playback_close,
+	.ioctl = snd_pcm_lib_ioctl,
+	.hw_params = snd_mxc_audio_hw_params,
+	.hw_free = snd_mxc_audio_hw_free,
+	.prepare = snd_mxc_audio_playback_prepare,
+	.trigger = snd_mxc_audio_playback_trigger,
+	.pointer = snd_mxc_audio_playback_pointer,
+#ifdef CONFIG_SND_MXC_PMIC_IRAM
+	.mmap = snd_mxc_audio_playback_mmap,
+#endif				/*CONFIG_SND_MXC_PMIC_IRAM */
+};
+
+/*!
+  * This functions initializes the capture audio device supported by
+  * PMIC IC.
+  *
+  * @param	mxc_audio	pointer to the sound card structure
+  *
+  */
+void init_device_capture(mxc_pmic_audio_t * mxc_audio)
+{
+	audio_stream_t *audio_stream;
+	pmic_audio_device_t *pmic_device;
+
+	audio_stream = &mxc_audio->s[SNDRV_PCM_STREAM_CAPTURE];
+	pmic_device = &audio_stream->pmic_audio_device;
+
+	/* These parameters defines the identity of
+	 * the device (codec or stereodac)
+	 */
+	audio_stream->ssi = SSI1;
+	audio_stream->dam_port = DAM_PORT_4;
+	pmic_device->ssi = SSI1;
+
+	pmic_device->mode = BUS_MASTER_MODE;
+	pmic_device->protocol = NETWORK_MODE;
+
+#ifdef CONFIG_MXC_PMIC_SC55112
+	pmic_device->pll = CLOCK_IN_CLKIN;
+	pmic_device->pll_rate = VCODEC_CLI_33_6MHZ;
+#else
+	if (machine_is_mx31ads()) {
+		pmic_device->pll = CLOCK_IN_CLIB;
+	} else {
+		pmic_device->pll = CLOCK_IN_CLIA;
+	}
+	pmic_device->pll_rate = VCODEC_CLI_26MHZ;
+#endif
+	pmic_device->bcl_inverted = 0;
+	pmic_device->fs_inverted = 0;
+
+}
+
+/*!
+  * This functions initializes the playback audio device supported by
+  * PMIC IC.
+  *
+  * @param	mxc_audio	pointer to the sound card structure.
+  * @param	device		device ID of PCM instance.
+  *
+  */
+void init_device_playback(mxc_pmic_audio_t * mxc_audio, int device)
+{
+	audio_stream_t *audio_stream;
+	pmic_audio_device_t *pmic_device;
+	if (device == 0)
+		audio_stream = &mxc_audio->s[0];
+	else
+		audio_stream = &mxc_audio->s[2];
+	pmic_device = &audio_stream->pmic_audio_device;
+
+	/* These parameters defines the identity of
+	 * the device (codec or stereodac)
+	 */
+	if (device == 0) {
+		if (audio_data->ssi_num == 2) {
+			audio_stream->ssi = SSI2;
+			audio_stream->dam_port = DAM_PORT_5;
+			pmic_device->ssi = SSI2;
+		} else {
+			audio_stream->ssi = SSI1;
+			audio_stream->dam_port = DAM_PORT_4;
+			pmic_device->ssi = SSI1;
+		}
+
+		pmic_device->mode = BUS_MASTER_MODE;
+		pmic_device->protocol = NETWORK_MODE;
+
+#ifdef CONFIG_MXC_PMIC_SC55112
+		pmic_device->pll = CLOCK_IN_CLKIN;
+		pmic_device->pll_rate = STDAC_CLI_33_6MHZ;
+#else
+		if (machine_is_mx31ads()) {
+			pmic_device->pll = CLOCK_IN_CLIB;
+		} else {
+			pmic_device->pll = CLOCK_IN_CLIA;
+		}
+		pmic_device->pll_rate = STDAC_CLI_26MHZ;
+#endif
+
+		pmic_device->bcl_inverted = 0;
+		pmic_device->fs_inverted = 0;
+
+	} else if ((device == 1) || (device == 2)) {
+		audio_stream->ssi = SSI1;
+		audio_stream->dam_port = DAM_PORT_4;
+		pmic_device->ssi = SSI1;
+
+		pmic_device->mode = BUS_MASTER_MODE;
+		pmic_device->protocol = NETWORK_MODE;
+
+#ifdef CONFIG_MXC_PMIC_SC55112
+		pmic_device->pll = CLOCK_IN_CLKIN;
+		pmic_device->pll_rate = VCODEC_CLI_33_6MHZ;
+#else
+		if (machine_is_mx31ads()) {
+			pmic_device->pll = CLOCK_IN_CLIB;
+		} else {
+			pmic_device->pll = CLOCK_IN_CLIA;
+		}
+		pmic_device->pll_rate = VCODEC_CLI_26MHZ;
+#endif
+		pmic_device->bcl_inverted = 0;
+		pmic_device->fs_inverted = 0;
+	}
+
+}
+
+/*!
+ * This functions initializes the mixer related information
+ *
+ * @param	mxc_audio	pointer to the sound card structure.
+ *
+ */
+void mxc_pmic_mixer_controls_init(mxc_pmic_audio_t * mxc_audio)
+{
+	audio_mixer_control_t *audio_control;
+	int i = 0;
+
+	audio_control = &audio_mixer_control;
+
+	memset(audio_control, 0, sizeof(audio_mixer_control_t));
+	sema_init(&audio_control->sem, 1);
+
+	audio_control->input_device = SOUND_MASK_MIC;
+	audio_control->output_device = SOUND_MASK_VOLUME | SOUND_MASK_PCM;
+
+	/* PMIC has to internal sources that can be routed to output
+	   One is codec direct out and the other is mixer out
+	   Initially we configure all outputs to have no source and
+	   will be later configured either by PCM stream handler or mixer */
+	for (i = 0; i < OP_MAXDEV && i != OP_HEADSET; i++) {
+		audio_control->source_for_output[i] = MIXER_OUT;
+	}
+
+	/* These bits are initially reset and set when playback begins */
+	audio_control->codec_out_to_mixer = 0;
+	audio_control->stdac_out_to_mixer = 0;
+
+	audio_control->mixer_balance = 50;
+	if (machine_is_mx31ads())
+		audio_control->mixer_mono_adder = STEREO_OPPOSITE_PHASE;
+	else
+		audio_control->mixer_mono_adder = MONO_ADDER_OFF;
+	/* Default values for input and output */
+	audio_control->input_volume = ((40 << 8) & 0xff00) | (40 & 0x00ff);
+	audio_control->master_volume_out = ((50 << 8) & 0xff00) | (50 & 0x00ff);
+
+	if (PMIC_SUCCESS != pmic_audio_set_autodetect(1))
+		msleep(30);
+}
+
+/*!
+ * This functions initializes the 2 audio devices supported by
+ * PMIC IC. The parameters define the type of device (CODEC or STEREODAC)
+ *
+ * @param	mxc_audio	pointer to the sound card structure.
+ * @param	device	        device id of the PCM stream.
+ *
+ */
+void mxc_pmic_audio_init(mxc_pmic_audio_t * mxc_audio, int device)
+{
+	if (device == 0) {
+		mxc_audio->s[SNDRV_PCM_STREAM_PLAYBACK].id = "Audio out";
+		mxc_audio->s[SNDRV_PCM_STREAM_PLAYBACK].stream_id =
+		    SNDRV_PCM_STREAM_PLAYBACK;
+		mxc_audio->s[SNDRV_PCM_STREAM_CAPTURE].id = "Audio in";
+		mxc_audio->s[SNDRV_PCM_STREAM_CAPTURE].stream_id =
+		    SNDRV_PCM_STREAM_CAPTURE;
+	} else if (device == 1) {
+		mxc_audio->s[2].id = "Audio out";
+		mxc_audio->s[2].stream_id = 2;
+	} else if (device == 2) {
+		mxc_audio->s[2].id = "Audio out";
+		mxc_audio->s[2].stream_id = 3;
+	}
+
+	init_device_playback(mxc_audio, device);
+	if (!device) {
+		init_device_capture(mxc_audio);
+	}
+}
+
+/*!
+  * This function the soundcard structure.
+  *
+  * @param	mxc_audio	pointer to the sound card structure.
+  * @param	device		the device index (zero based)
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int __devinit snd_card_mxc_audio_pcm(mxc_pmic_audio_t *mxc_audio,
+					    int device)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	/*
+	 * Create a new PCM instance with 1 capture stream and 1 playback substream
+	 */
+	if ((err = snd_pcm_new(mxc_audio->card, "MXC", device, 1, 1, &pcm)) < 0) {
+		return err;
+	}
+
+	/*
+	 * this sets up our initial buffers and sets the dma_type to isa.
+	 * isa works but I'm not sure why (or if) it's the right choice
+	 * this may be too large, trying it for now
+	 */
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+					      snd_dma_continuous_data
+					      (GFP_KERNEL), MAX_BUFFER_SIZE * 2,
+					      MAX_BUFFER_SIZE * 2);
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_card_mxc_audio_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+			&snd_card_mxc_audio_capture_ops);
+
+	pcm->private_data = mxc_audio;
+	pcm->info_flags = 0;
+	strncpy(pcm->name, SOUND_CARD_NAME, sizeof(pcm->name));
+	mxc_audio->pcm[device] = pcm;
+	mxc_pmic_audio_init(mxc_audio, device);
+
+	/* Allocating a second device for PCM playback on voice codec */
+	device = 1;
+	if ((err = snd_pcm_new(mxc_audio->card, "MXC", device, 1, 0, &pcm)) < 0) {
+		return err;
+	}
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+					      snd_dma_continuous_data
+					      (GFP_KERNEL), MAX_BUFFER_SIZE * 2,
+					      MAX_BUFFER_SIZE * 2);
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_card_mxc_audio_playback_ops);
+	pcm->private_data = mxc_audio;
+	pcm->info_flags = 0;
+	strncpy(pcm->name, SOUND_CARD_NAME, sizeof(pcm->name));
+	mxc_audio->pcm[device] = pcm;
+	mxc_pmic_audio_init(mxc_audio, device);
+
+	device = 2;
+	if ((err = snd_pcm_new(mxc_audio->card, "MXC", device, 1, 0, &pcm)) < 0) {
+		return err;
+	}
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
+					      snd_dma_continuous_data
+					      (GFP_KERNEL), MAX_BUFFER_SIZE * 2,
+					      MAX_BUFFER_SIZE * 2);
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			&snd_card_mxc_audio_playback_ops);
+	pcm->private_data = mxc_audio;
+	pcm->info_flags = 0;
+	strncpy(pcm->name, SOUND_CARD_NAME, sizeof(pcm->name));
+	mxc_audio->pcm[device] = pcm;
+
+	/* End of allocation */
+	/* FGA for record and not hard coded playback */
+	mxc_pmic_mixer_controls_init(mxc_audio);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+/*!
+  * This function suspends all active streams.
+  *
+  * TBD
+  *
+  * @param	card	pointer to the sound card structure.
+  * @param	state	requested state
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_suspend(struct platform_device *dev,
+				 pm_message_t state)
+{
+	struct snd_card *card = platform_get_drvdata(dev);
+	mxc_pmic_audio_t *chip = card->private_data;
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+	snd_pcm_suspend_all(chip->pcm[0]);
+	//mxc_alsa_audio_shutdown(chip);
+
+	return 0;
+}
+
+/*!
+  * This function resumes all suspended streams.
+  *
+  * TBD
+  *
+  * @param	card	pointer to the sound card structure.
+  * @param	state	requested state
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_audio_resume(struct platform_device *dev)
+{
+	struct snd_card *card = platform_get_drvdata(dev);
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+#endif				/* COMFIG_PM */
+
+/*!
+  * This function frees the sound card structure
+  *
+  * @param	card	pointer to the sound card structure.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+void snd_mxc_audio_free(struct snd_card *card)
+{
+	mxc_pmic_audio_t *chip;
+
+	chip = card->private_data;
+	audio_dma_free(&chip->s[SNDRV_PCM_STREAM_PLAYBACK]);
+	audio_dma_free(&chip->s[SNDRV_PCM_STREAM_CAPTURE]);
+	mxc_audio = NULL;
+	card->private_data = NULL;
+	kfree(chip);
+
+}
+
+/*!
+  * This function initializes the driver in terms of memory of the soundcard
+  * and some basic HW clock settings.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int __devinit mxc_alsa_audio_probe(struct platform_device *pdev)
+{
+	int err;
+	struct snd_card *card;
+
+	audio_data = (struct mxc_audio_platform_data *)pdev->dev.platform_data;
+	if (!audio_data) {
+		dev_err(&pdev->dev, "Can't get the platform data for ALSA\n");
+		return -EINVAL;
+	}
+	/* register the soundcard */
+	card = snd_card_new(-1, id, THIS_MODULE, sizeof(mxc_pmic_audio_t));
+	if (card == NULL) {
+		return -ENOMEM;
+	}
+
+	mxc_audio = kcalloc(1, sizeof(*mxc_audio), GFP_KERNEL);
+	if (mxc_audio == NULL) {
+		return -ENOMEM;
+	}
+
+	card->private_data = (void *)mxc_audio;
+	card->private_free = snd_mxc_audio_free;
+
+	mxc_audio->card = card;
+	card->dev = &pdev->dev;
+	if ((err = snd_card_mxc_audio_pcm(mxc_audio, 0)) < 0) {
+		goto nodev;
+	}
+
+	if (0 == mxc_alsa_create_ctl(card, (void *)&audio_mixer_control))
+		printk(KERN_INFO "Control ALSA component registered\n");
+
+#ifdef CONFIG_HEADSET_DETECT_ENABLE
+	pmic_audio_antipop_enable(ANTI_POP_RAMP_SLOW);
+	pmic_audio_set_callback((PMIC_AUDIO_CALLBACK) HSCallback,
+				HEADSET_DETECTED | HEADSET_REMOVED, &hs_state);
+#endif
+	/* Set autodetect feature in order to allow audio operations */
+
+	spin_lock_init(&(mxc_audio->s[0].dma_lock));
+	spin_lock_init(&(mxc_audio->s[1].dma_lock));
+	spin_lock_init(&(mxc_audio->s[2].dma_lock));
+
+	strcpy(card->driver, "MXC");
+	strcpy(card->shortname, "PMIC-audio");
+	sprintf(card->longname, "MXC Freescale with PMIC");
+
+	if ((err = snd_card_register(card)) == 0) {
+		pr_debug(KERN_INFO "MXC audio support initialized\n");
+		platform_set_drvdata(pdev, card);
+		return 0;
+	}
+
+      nodev:
+	snd_card_free(card);
+	return err;
+}
+
+static int __devexit mxc_alsa_audio_remove(struct platform_device *dev)
+{
+	snd_card_free(mxc_audio->card);
+	kfree(mxc_audio);
+	platform_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver mxc_alsa_audio_driver = {
+	.probe = mxc_alsa_audio_probe,
+	.remove = __devexit_p(mxc_alsa_audio_remove),
+#ifdef CONFIG_PM
+	.suspend = snd_mxc_audio_suspend,
+	.resume = snd_mxc_audio_resume,
+#endif
+	.driver = {
+		   .name = "mxc_alsa",
+		   },
+};
+
+static int __init mxc_alsa_audio_init(void)
+{
+	return platform_driver_register(&mxc_alsa_audio_driver);
+}
+
+/*!
+  * This function frees the sound driver structure.
+  *
+  */
+
+static void __exit mxc_alsa_audio_exit(void)
+{
+	platform_driver_unregister(&mxc_alsa_audio_driver);
+}
+
+module_init(mxc_alsa_audio_init);
+module_exit(mxc_alsa_audio_exit);
+
+MODULE_AUTHOR("FREESCALE SEMICONDUCTOR");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MXC driver for ALSA");
+MODULE_SUPPORTED_DEVICE("{{PMIC}}");
+
+module_param(id, charp, 0444);
+MODULE_PARM_DESC(id, "ID string for MXC  + PMIC soundcard.");
diff --git a/sound/arm/mxc-alsa-pmic.h b/sound/arm/mxc-alsa-pmic.h
new file mode 100644
index 000000000000..46c5ca4ae1ab
--- /dev/null
+++ b/sound/arm/mxc-alsa-pmic.h
@@ -0,0 +1,110 @@
+/*
+ * 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
+ *
+ * Copyright 2007-2008 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+ /*!
+  * @file mxc-alsa-pmic.h
+  * @brief
+  * @ingroup SOUND_DRV
+  */
+
+#ifndef __MXC_ALSA_PMIC_H__
+#define __MXC_ALSA_PMIC_H__
+
+#ifdef __KERNEL__
+
+ /**/
+#define PMIC_MASTER					0x1
+#define PMIC_SLAVE					0x2
+     /**/
+#define DAM_PORT_4					port_4
+#define DAM_PORT_5					port_5
+     /**/
+#define PMIC_STEREODAC					0x1
+#define PMIC_CODEC					0x2
+     /**/
+#define PMIC_AUDIO_ADDER_STEREO				0x1
+#define PMIC_AUDIO_ADDER_STEREO_OPPOSITE		0x2
+#define PMIC_AUDIO_ADDER_MONO				0x4
+#define PMIC_AUDIO_ADDER_MONO_OPPOSITE			0x8
+#define TX_WATERMARK					0x4
+#define RX_WATERMARK					0x6
+     /**/
+#define SSI_DEFAULT_FIFO				0x0
+#define DEFAULT_MASTER_CLOCK				0x1
+     /**/
+#define SDMA_TXFIFO_WATERMARK				0x4
+#define SDMA_RXFIFO_WATERMARK				0x6
+     /**/
+#define TIMESLOTS_2					0x3
+#define TIMESLOTS_4					0x2
+#define SAMPLE_RATE_MAX					0x9
+     /**/
+#define CLK_SELECT_SLAVE_BCL				0x7
+#define CLK_SELECT_SLAVE_CLI				0x5
+#define CLK_SELECT_MASTER_CLI				0x4
+/* Volume to balance ratio */
+#define VOLUME_BALANCE_RATIO				((6 + 39) / (21 + 21))
+/* -21dB */
+#define PMIC_BALANCE_MIN				0x0
+/* 0dB*/
+#define PMIC_BALANCE_MAX				0x7
+/* -21dB left */
+#define BALANCE_MIN					0x0
+/* 0db, no balance */
+#define NO_BALANCE					0x32
+/* -21dB right*/
+#define BALANCE_MAX					0x64
+/* -8dB */
+#define PMIC_INPUT_VOLUME_MIN             		0x0
+/* +23dB */
+#define PMIC_INPUT_VOLUME_MAX             		0x1f
+/* -39dB */
+#define PMIC_OUTPUT_VOLUME_MIN			PMIC_INPUT_VOLUME_MIN
+/* +6dB */
+#define PMIC_OUTPUT_VOLUME_MAX            		0xd
+/* -8dB */
+#define INPUT_VOLUME_MIN				0x0
+/* +23dB */
+#define INPUT_VOLUME_MAX				0x64
+/* -39dB */
+#define OUTPUT_VOLUME_MIN				0x0
+/* +6dB */
+#define OUTPUT_VOLUME_MAX				0x64
+/* 96 Khz */
+#define SAMPLE_FREQ_MAX					96000
+/* 8 Khz */
+#define SAMPLE_FREQ_MIN					8000
+/*!
+ * Define channels available on MC13783. This is mainly used
+ * in mixer interface to control different input/output
+ * devices
+ */
+#define MXC_STEREO_OUTPUT				( SOUND_MASK_VOLUME | SOUND_MASK_PCM )
+#define MXC_STEREO_INPUT				( SOUND_MASK_PHONEIN )
+#define MXC_MONO_OUTPUT					( SOUND_MASK_PHONEOUT | SOUND_MASK_SPEAKER )
+#define MXC_MONO_INPUT					( SOUND_MASK_LINE | SOUND_MASK_MIC )
+#define SNDCTL_CLK_SET_MASTER                   	_SIOR('Z', 30, int)
+#define SNDCTL_PMIC_READ_OUT_BALANCE      		_SIOR('Z', 8, int)
+//#define SNDCTL_MC13783_WRITE_OUT_BALANCE                      _SIOWR('Z', 9, int)
+#define SNDCTL_PMIC_WRITE_OUT_ADDER			_SIOWR('Z', 10, int)
+#define SNDCTL_PMIC_READ_OUT_ADDER			_SIOR('Z', 11, int)
+#define SNDCTL_PMIC_WRITE_CODEC_FILTER		_SIOWR('Z', 12, int)
+#define SNDCTL_PMIC_READ_CODEC_FILTER		_SIOR('Z', 13, int)
+#define SNDCTL_DAM_SET_OUT_PORT				_SIOWR('Z', 14, int)
+#endif				/* __KERNEL__ */
+#endif				/* __MXC_ALSA_PMIC_H__ */
diff --git a/sound/arm/mxc-alsa-spdif.c b/sound/arm/mxc-alsa-spdif.c
new file mode 100644
index 000000000000..b322cbc2f40b
--- /dev/null
+++ b/sound/arm/mxc-alsa-spdif.c
@@ -0,0 +1,2264 @@
+/*
+ * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ * @defgroup SOUND_DRV MXC Sound Driver for ALSA
+ */
+
+/*!
+ * @file       mxc-alsa-spdif.c
+ * @brief      this fle       mxc-alsa-spdif.c
+ * @brief      this file implements mxc alsa driver for spdif.
+ *             The spdif tx supports consumer channel for linear PCM and
+ *	       compressed audio data. The supported sample rates are
+ *	       48KHz, 44.1KHz and 32KHz.
+ *
+ * @ingroup SOUND_DRV
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/ioctl.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/soundcard.h>
+#include <linux/clk.h>
+#ifdef CONFIG_PM
+#include <linux/pm.h>
+#endif
+
+#include <mach/dma.h>
+#include <asm/mach-types.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/asoundef.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+
+#define MXC_SPDIF_NAME "MXC_SPDIF"
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for spdif sound card.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for spdif sound card.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable spdif sound card.");
+
+#define SPDIF_MAX_BUF_SIZE      (32*1024)
+#define SPDIF_DMA_BUF_SIZE	(8*1024)
+#define SPDIF_MIN_PERIOD_SIZE	64
+#define SPDIF_MIN_PERIOD	2
+#define SPDIF_MAX_PERIOD	255
+
+#define SPDIF_REG_SCR		0x00
+#define SPDIF_REG_SRCD		0x04
+#define SPDIF_REG_SRPC		0x08
+#define SPDIF_REG_SIE		0x0C
+#define SPDIF_REG_SIS		0x10
+#define SPDIF_REG_SIC		0x10
+#define SPDIF_REG_SRL		0x14
+#define SPDIF_REG_SRR		0x18
+#define SPDIF_REG_SRCSLH	0x1C
+#define SPDIF_REG_SRCSLL	0x20
+#define SPDIF_REG_SQU		0x24
+#define SPDIF_REG_SRQ		0x28
+#define SPDIF_REG_STL		0x2C
+#define SPDIF_REG_STR		0x30
+#define SPDIF_REG_STCSCH	0x34
+#define SPDIF_REG_STCSCL	0x38
+#define SPDIF_REG_SRFM		0x44
+#define SPDIF_REG_STC		0x50
+
+/* SPDIF Configuration register */
+#define SCR_RXFIFO_CTL_ZERO	(1 << 23)
+#define SCR_RXFIFO_OFF		(1 << 22)
+#define SCR_RXFIFO_RST		(1 << 21)
+#define SCR_RXFIFO_FSEL_BIT	(19)
+#define SCR_RXFIFO_FSEL_MASK	(0x3 << SCR_RXFIFO_FSEL_BIT)
+#define SCR_RXFIFO_AUTOSYNC	(1 << 18)
+#define SCR_TXFIFO_AUTOSYNC	(1 << 17)
+#define SCR_TXFIFO_ESEL_BIT	(15)
+#define SCR_TXFIFO_ESEL_MASK	(0x3 << SCR_TXFIFO_FSEL_BIT)
+#define SCR_LOW_POWER		(1 << 13)
+#define SCR_SOFT_RESET		(1 << 12)
+#define SCR_TXFIFO_ZERO		(0 << 10)
+#define SCR_TXFIFO_NORMAL	(1 << 10)
+#define SCR_TXFIFO_ONESAMPLE	(1 << 11)
+#define SCR_DMA_RX_EN		(1 << 9)
+#define SCR_DMA_TX_EN		(1 << 8)
+#define SCR_VAL_CLEAR		(1 << 5)
+#define SCR_TXSEL_OFF		(0 << 2)
+#define SCR_TXSEL_RX		(1 << 2)
+#define SCR_TXSEL_NORMAL	(0x5 << 2)
+#define SCR_USRC_SEL_NONE	(0x0)
+#define SCR_USRC_SEL_RECV	(0x1)
+#define SCR_USRC_SEL_CHIP	(0x3)
+
+/* SPDIF CDText control */
+#define SRCD_CD_USER_OFFSET	1
+#define SRCD_CD_USER		(1 << SRCD_CD_USER_OFFSET)
+
+/* SPDIF Phase Configuration register */
+#define SRPC_DPLL_LOCKED	(1 << 6)
+#define SRPC_CLKSRC_SEL_OFFSET	7
+#define SRPC_CLKSRC_SEL_LOCKED	5
+/* gain sel */
+#define SRPC_GAINSEL_OFFSET	3
+
+enum spdif_gainsel {
+	GAINSEL_MULTI_24 = 0,
+	GAINSEL_MULTI_16,
+	GAINSEL_MULTI_12,
+	GAINSEL_MULTI_8,
+	GAINSEL_MULTI_6,
+	GAINSEL_MULTI_4,
+	GAINSEL_MULTI_3,
+	GAINSEL_MULTI_MAX,
+};
+
+#define SPDIF_DEFAULT_GAINSEL	GAINSEL_MULTI_8
+
+/* SPDIF interrupt mask define */
+#define INT_DPLL_LOCKED		(1 << 20)
+#define INT_TXFIFO_UNOV		(1 << 19)
+#define INT_TXFIFO_RESYNC	(1 << 18)
+#define INT_CNEW		(1 << 17)
+#define INT_VAL_NOGOOD		(1 << 16)
+#define INT_SYM_ERR		(1 << 15)
+#define INT_BIT_ERR		(1 << 14)
+#define INT_URX_FUL		(1 << 10)
+#define INT_URX_OV		(1 << 9)
+#define INT_QRX_FUL		(1 << 8)
+#define INT_QRX_OV		(1 << 7)
+#define INT_UQ_SYNC		(1 << 6)
+#define INT_UQ_ERR		(1 << 5)
+#define INT_RX_UNOV		(1 << 4)
+#define INT_RX_RESYNC		(1 << 3)
+#define INT_LOSS_LOCK		(1 << 2)
+#define INT_TX_EMPTY		(1 << 1)
+#define INT_RXFIFO_FUL		(1 << 0)
+
+/* SPDIF Clock register */
+#define STC_SYSCLK_DIV_OFFSET	11
+#define STC_TXCLK_SRC_OFFSET	8
+#define STC_TXCLK_DIV_OFFSET	0
+
+#define SPDIF_CSTATUS_BYTE	6
+#define SPDIF_UBITS_SIZE	96
+#define SPDIF_QSUB_SIZE		(SPDIF_UBITS_SIZE/8)
+
+enum spdif_clk_accuracy {
+	SPDIF_CLK_ACCURACY_LEV2 = 0,
+	SPDIF_CLK_ACCURACY_LEV1 = 2,
+	SPDIF_CLK_ACCURACY_LEV3 = 1,
+	SPDIF_CLK_ACCURACY_RESV = 3
+};
+
+/* SPDIF clock source */
+enum spdif_clk_src {
+	SPDIF_CLK_SRC1 = 0,
+	SPDIF_CLK_SRC2,
+	SPDIF_CLK_SRC3,
+	SPDIF_CLK_SRC4,
+	SPDIF_CLK_SRC5,
+};
+
+enum spdif_max_wdl {
+	SPDIF_MAX_WDL_20,
+	SPDIF_MAX_WDL_24
+};
+
+enum spdif_wdl {
+	SPDIF_WDL_DEFAULT = 0,
+	SPDIF_WDL_FIFTH = 4,
+	SPDIF_WDL_FOURTH = 3,
+	SPDIF_WDL_THIRD = 2,
+	SPDIF_WDL_SECOND = 1,
+	SPDIF_WDL_MAX = 5
+};
+
+static unsigned int gainsel_multi[GAINSEL_MULTI_MAX] = {
+	24 * 1024, 16 * 1024, 12 * 1024,
+	8 * 1024, 6 * 1024, 4 * 1024,
+	3 * 1024,
+};
+
+/*!
+ * SPDIF control structure
+ * Defines channel status, subcode and Q sub
+ */
+struct spdif_mixer_control {
+
+	/* spinlock to access control data */
+	spinlock_t ctl_lock;
+	/* IEC958 channel tx status bit */
+	unsigned char ch_status[4];
+	/* User bits */
+	unsigned char subcode[2 * SPDIF_UBITS_SIZE];
+	/* Q subcode part of user bits */
+	unsigned char qsub[2 * SPDIF_QSUB_SIZE];
+	/* buffer ptrs for writer */
+	unsigned int upos;
+	unsigned int qpos;
+	/* ready buffer index of the two buffers */
+	unsigned int ready_buf;
+};
+
+/*!
+ * This structure represents an audio stream in term of
+ * channel DMA, HW configuration on spdif controller.
+ */
+struct mxc_spdif_stream {
+
+	/*!
+	 * identification string
+	 */
+	char *id;
+	/*!
+	 * device identifier for DMA
+	 */
+	int dma_wchannel;
+	/*!
+	 * we are using this stream for transfer now
+	 */
+	int active:1;
+	/*!
+	 * current transfer period
+	 */
+	int period;
+	/*!
+	 * current count of transfered periods
+	 */
+	int periods;
+	/*!
+	 * for locking in DMA operations
+	 */
+	spinlock_t dma_lock;
+	/*!
+	 * Alsa substream pointer
+	 */
+	struct snd_pcm_substream *stream;
+};
+
+struct mxc_spdif_device {
+	/*!
+	 * SPDIF module register base address
+	 */
+	unsigned long __iomem *reg_base;
+
+	/*!
+	 * spdif tx available or not
+	 */
+	int mxc_spdif_tx;
+
+	/*!
+	 * spdif rx available or not
+	 */
+	int mxc_spdif_rx;
+
+	/*!
+	 * spdif 44100 clock src
+	 */
+	int spdif_txclk_44100;
+
+	/*!
+	 * spdif 48000 clock src
+	 */
+	int spdif_txclk_48000;
+
+	/*!
+	 * ALSA SPDIF sound card handle
+	 */
+	struct snd_card *card;
+
+	/*!
+	 * ALSA spdif driver type handle
+	 */
+	struct snd_pcm *pcm;
+
+	/*!
+	 * DPLL locked status
+	 */
+	atomic_t dpll_locked;
+
+	/*!
+	 * Playback/Capture substream
+	 */
+	struct mxc_spdif_stream s[2];
+};
+
+static struct spdif_mixer_control mxc_spdif_control;
+
+static unsigned long spdif_base_addr;
+
+/* define each spdif interrupt handlers */
+typedef void (*spdif_irq_func_t) (unsigned int bit, void *desc);
+
+/* spdif irq functions declare */
+static void spdif_irq_fifo(unsigned int bit, void *devid);
+static void spdif_irq_dpll_lock(unsigned int bit, void *devid);
+static void spdif_irq_uq(unsigned int bit, void *devid);
+static void spdif_irq_bit_error(unsigned int bit, void *devid);
+static void spdif_irq_sym_error(unsigned int bit, void *devid);
+static void spdif_irq_valnogood(unsigned int bit, void *devid);
+static void spdif_irq_cnew(unsigned int bit, void *devid);
+
+/* irq function list */
+static spdif_irq_func_t spdif_irq_handlers[] = {
+	spdif_irq_fifo,
+	spdif_irq_fifo,
+	spdif_irq_dpll_lock,
+	NULL,
+	spdif_irq_fifo,
+	spdif_irq_uq,
+	spdif_irq_uq,
+	spdif_irq_uq,
+	spdif_irq_uq,
+	spdif_irq_uq,
+	spdif_irq_uq,
+	NULL,
+	NULL,
+	NULL,
+	spdif_irq_bit_error,
+	spdif_irq_sym_error,
+	spdif_irq_valnogood,
+	spdif_irq_cnew,
+	NULL,
+	spdif_irq_fifo,
+	spdif_irq_dpll_lock,
+};
+
+/*!
+ * @brief Enable/Disable spdif DMA request
+ *
+ * This function is called to enable or disable the dma transfer
+ */
+static void spdif_dma_enable(int txrx, int enable)
+{
+	unsigned long value;
+
+	value = __raw_readl(SPDIF_REG_SCR + spdif_base_addr) & 0xfffeff;
+	if (enable)
+		value |= txrx;
+
+	__raw_writel(value, SPDIF_REG_SCR + spdif_base_addr);
+
+}
+
+/*!
+ * @brief Enable spdif interrupt
+ *
+ * This function is called to enable relevant interrupts.
+ */
+static void spdif_intr_enable(unsigned long intr, int enable)
+{
+	unsigned long value;
+
+	value = __raw_readl(spdif_base_addr + SPDIF_REG_SIE) & 0xffffff;
+	if (enable)
+		value |= intr;
+	else
+		value &= ~intr;
+
+	__raw_writel(value, spdif_base_addr + SPDIF_REG_SIE);
+}
+
+/*!
+ * @brief Set the clock accuracy level in the channel bit
+ *
+ * This function is called to set the clock accuracy level
+ */
+static int spdif_set_clk_accuracy(enum spdif_clk_accuracy level)
+{
+	unsigned long value;
+
+	value = __raw_readl(SPDIF_REG_STCSCL + spdif_base_addr) & 0xffffcf;
+	value |= (level << 4);
+	__raw_writel(value, SPDIF_REG_STCSCL + spdif_base_addr);
+
+	return 0;
+}
+
+/*!
+ * set SPDIF PhaseConfig register for rx clock
+ */
+static int spdif_set_rx_clksrc(enum spdif_clk_src clksrc,
+			       enum spdif_gainsel gainsel, int dpll_locked)
+{
+	unsigned long value;
+	if (clksrc > SPDIF_CLK_SRC5 || gainsel > GAINSEL_MULTI_3)
+		return 1;
+
+	value = (dpll_locked ? (clksrc) :
+		 (clksrc + SRPC_CLKSRC_SEL_LOCKED)) << SRPC_CLKSRC_SEL_OFFSET |
+	    (gainsel << SRPC_GAINSEL_OFFSET);
+	__raw_writel(value, spdif_base_addr + SPDIF_REG_SRPC);
+
+	return 0;
+}
+
+/*!
+ * Get RX data clock rate
+ * given the SPDIF bus_clk
+ */
+static int spdif_get_rxclk_rate(struct clk *bus_clk, enum spdif_gainsel gainsel)
+{
+	unsigned long freqmeas, phaseconf, busclk_freq = 0;
+	u64 tmpval64;
+	enum spdif_clk_src clksrc;
+
+	freqmeas = __raw_readl(spdif_base_addr + SPDIF_REG_SRFM);
+	phaseconf = __raw_readl(spdif_base_addr + SPDIF_REG_SRPC);
+
+	clksrc = (phaseconf >> SRPC_CLKSRC_SEL_OFFSET) & 0x0F;
+	if (clksrc < 5 && (phaseconf & SRPC_DPLL_LOCKED)) {
+		/* get bus clock from system */
+		busclk_freq = clk_get_rate(bus_clk);
+	}
+
+	/* FreqMeas_CLK = (BUS_CLK*FreqMeas[23:0])/2^10/GAINSEL/128 */
+	tmpval64 = (u64) busclk_freq * freqmeas;
+	do_div(tmpval64, gainsel_multi[gainsel]);
+	do_div(tmpval64, 128 * 1024);
+	return (int)tmpval64;
+}
+
+/*!
+ * @brief Set the audio sample rate in the channel status bit
+ *
+ * This function is called to set the audio sample rate to be transfered.
+ */
+static int spdif_set_sample_rate(int src_44100, int src_48000, int sample_rate)
+{
+	unsigned long cstatus, stc;
+
+	cstatus = __raw_readl(SPDIF_REG_STCSCL + spdif_base_addr) & 0xfffff0;
+	stc = __raw_readl(SPDIF_REG_STC + spdif_base_addr) & ~0x7FF;
+
+	switch (sample_rate) {
+	case 44100:
+		__raw_writel(cstatus, SPDIF_REG_STCSCL + spdif_base_addr);
+		stc |= (src_44100 << 8) | 0x07;
+		__raw_writel(stc, SPDIF_REG_STC + spdif_base_addr);
+		pr_debug("set sample rate to 44100\n");
+		break;
+	case 48000:
+		cstatus |= 0x04;
+		__raw_writel(cstatus, SPDIF_REG_STCSCL + spdif_base_addr);
+		stc |= (src_48000 << 8) | 0x07;
+		__raw_writel(stc, SPDIF_REG_STC + spdif_base_addr);
+		pr_debug("set sample rate to 48000\n");
+		break;
+	case 32000:
+		cstatus |= 0x0c;
+		__raw_writel(cstatus, SPDIF_REG_STCSCL + spdif_base_addr);
+		stc |= (src_48000 << 8) | 0x0b;
+		__raw_writel(stc, SPDIF_REG_STC + spdif_base_addr);
+		pr_debug("set sample rate to 32000\n");
+		break;
+	}
+
+	return 0;
+}
+
+/*!
+ * @brief Set the lchannel status bit
+ *
+ * This function is called to set the channel status
+ */
+static int spdif_set_channel_status(int value, unsigned long reg)
+{
+	__raw_writel(value & 0xffffff, reg + spdif_base_addr);
+
+	return 0;
+}
+
+/*!
+ * @brief Get spdif interrupt status and clear the interrupt
+ *
+ * This function is called to check relevant interrupt status
+ */
+static int spdif_intr_status(void)
+{
+	unsigned long value;
+
+	value = __raw_readl(SPDIF_REG_SIS + spdif_base_addr) & 0xffffff;
+	value &= __raw_readl(spdif_base_addr + SPDIF_REG_SIE);
+	__raw_writel(value, SPDIF_REG_SIC + spdif_base_addr);
+
+	return value;
+}
+
+/*!
+ * @brief spdif interrupt handler
+ */
+static irqreturn_t spdif_isr(int irq, void *dev_id)
+{
+	unsigned long int_stat;
+	int line;
+
+	int_stat = spdif_intr_status();
+
+	while ((line = ffs(int_stat)) != 0) {
+		int_stat &= ~(1UL << (line - 1));
+		if (spdif_irq_handlers[line - 1] != NULL)
+			spdif_irq_handlers[line - 1] (line - 1, dev_id);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*!
+ * Interrupt handlers
+ *
+ */
+/*!
+ * FIFO related interrupts handler
+ *
+ * Rx FIFO Full, Underrun/Overrun interrupts
+ * Tx FIFO Empty, Underrun/Overrun interrupts
+ */
+static void spdif_irq_fifo(unsigned int bit, void *devid)
+{
+
+}
+
+/*!
+ * DPLL lock related interrupts handler
+ *
+ * DPLL locked and lock loss interrupts
+ */
+static void spdif_irq_dpll_lock(unsigned int bit, void *devid)
+{
+	struct mxc_spdif_device *chip = (struct mxc_spdif_device *)devid;
+	unsigned int locked = __raw_readl(spdif_base_addr + SPDIF_REG_SRPC);
+
+	if (locked & SRPC_DPLL_LOCKED) {
+		pr_debug("SPDIF Rx dpll locked\n");
+		atomic_set(&chip->dpll_locked, 1);
+	} else {
+		/* INT_LOSS_LOCK */
+		pr_debug("SPDIF Rx dpll loss lock\n");
+		atomic_set(&chip->dpll_locked, 0);
+	}
+}
+
+/*!
+ * U/Q channel related interrupts handler
+ *
+ * U/QChannel full, overrun interrupts
+ * U/QChannel sync error and frame error interrupts
+ */
+static void spdif_irq_uq(unsigned int bit, void *devid)
+{
+	unsigned long val;
+	int index;
+	struct spdif_mixer_control *ctrl = &mxc_spdif_control;
+
+	bit = 1 << bit;
+	/* get U/Q channel datas */
+	switch (bit) {
+
+	case INT_URX_OV:	/* read U data */
+		pr_debug("User bit receive overrun\n");
+	case INT_URX_FUL:
+		pr_debug("U bit receive full\n");
+
+		if (ctrl->upos >= SPDIF_UBITS_SIZE * 2) {
+			ctrl->upos = 0;
+		} else if (unlikely((ctrl->upos % SPDIF_UBITS_SIZE) + 3
+				    > SPDIF_UBITS_SIZE)) {
+			pr_err("User bit receivce buffer overflow\n");
+			break;
+		}
+		val = __raw_readl(spdif_base_addr + SPDIF_REG_SQU);
+		ctrl->subcode[ctrl->upos++] = val >> 16;
+		ctrl->subcode[ctrl->upos++] = val >> 8;
+		ctrl->subcode[ctrl->upos++] = val;
+
+		break;
+
+	case INT_QRX_OV:	/* read Q data */
+		pr_debug("Q bit receive overrun\n");
+	case INT_QRX_FUL:
+		pr_debug("Q bit receive full\n");
+
+		if (ctrl->qpos >= SPDIF_QSUB_SIZE * 2) {
+			ctrl->qpos = 0;
+		} else if (unlikely((ctrl->qpos % SPDIF_QSUB_SIZE) + 3
+				    > SPDIF_QSUB_SIZE)) {
+			pr_err("Q bit receivce buffer overflow\n");
+			break;
+		}
+		val = __raw_readl(spdif_base_addr + SPDIF_REG_SRQ);
+		ctrl->qsub[ctrl->qpos++] = val >> 16;
+		ctrl->qsub[ctrl->qpos++] = val >> 8;
+		ctrl->qsub[ctrl->qpos++] = val;
+
+		break;
+
+	case INT_UQ_ERR:	/* read U/Q data and do buffer reset */
+		pr_debug("U/Q bit receive error\n");
+		val = __raw_readl(spdif_base_addr + SPDIF_REG_SQU);
+		val = __raw_readl(spdif_base_addr + SPDIF_REG_SRQ);
+		/* drop this U/Q buffer */
+		ctrl->ready_buf = ctrl->upos = ctrl->qpos = 0;
+		break;
+
+	case INT_UQ_SYNC:	/* U/Q buffer reset */
+		pr_debug("U/Q sync receive\n");
+
+		if (ctrl->qpos == 0)
+			break;
+		index = (ctrl->qpos - 1) / SPDIF_QSUB_SIZE;
+		/* set ready to this buffer */
+		ctrl->ready_buf = index + 1;
+		break;
+	}
+}
+
+/*!
+ * SPDIF receiver found parity bit error interrupt handler
+ */
+static void spdif_irq_bit_error(unsigned int bit, void *devid)
+{
+	pr_debug("SPDIF interrupt parity bit error\n");
+}
+
+/*!
+ * SPDIF receiver found illegal symbol interrupt handler
+ */
+static void spdif_irq_sym_error(unsigned int bit, void *devid)
+{
+	pr_debug("SPDIF interrupt symbol error\n");
+}
+
+/*!
+ * SPDIF validity flag no good interrupt handler
+ */
+static void spdif_irq_valnogood(unsigned int bit, void *devid)
+{
+	pr_debug("SPDIF interrupt validate is not good\n");
+}
+
+/*!
+ * SPDIF receive change in value of control channel
+ */
+static void spdif_irq_cnew(unsigned int bit, void *devid)
+{
+	pr_debug("SPDIF interrupt cstatus new\n");
+}
+
+/*!
+ * Do software reset to SPDIF
+ */
+static void spdif_softreset(void)
+{
+	unsigned long value = 1;
+	int cycle = 0;
+	__raw_writel(SCR_SOFT_RESET, spdif_base_addr + SPDIF_REG_SCR);
+	while (value && (cycle++ < 10)) {
+		value = __raw_readl(spdif_base_addr + SPDIF_REG_SCR) & 0x1000;
+	}
+
+}
+
+/*!
+ * SPDIF RX initial function
+ */
+static void spdif_rx_init(void)
+{
+	unsigned long regval;
+
+	regval = __raw_readl(spdif_base_addr + SPDIF_REG_SCR);
+	/**
+	 * initial and reset SPDIF configuration:
+	 * RxFIFO off
+	 * RxFIFO sel to 8 sample
+	 * Autosync
+	 * Valid bit set
+	 */
+	regval &= ~(SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO | SCR_LOW_POWER);
+	regval |= (2 << SCR_RXFIFO_FSEL_BIT) | SCR_RXFIFO_AUTOSYNC;
+	__raw_writel(regval, spdif_base_addr + SPDIF_REG_SCR);
+}
+
+/*!
+ * SPDIF RX un-initial function
+ */
+static void spdif_rx_uninit(void)
+{
+	unsigned long regval;
+
+	/* turn off RX fifo, disable dma and autosync */
+	regval = __raw_readl(spdif_base_addr + SPDIF_REG_SCR);
+	regval |= SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO;
+	regval &= ~(SCR_DMA_RX_EN | SCR_RXFIFO_AUTOSYNC);
+	__raw_writel(regval, spdif_base_addr + SPDIF_REG_SCR);
+}
+
+/*!
+ * @brief Initialize spdif module
+ *
+ * This function is called to set the spdif to initial state.
+ */
+static void spdif_tx_init(void)
+{
+	unsigned long regval;
+
+	regval = __raw_readl(spdif_base_addr + SPDIF_REG_SCR);
+
+	regval &= 0xfc32e3;
+	regval |= SCR_TXFIFO_AUTOSYNC | SCR_TXFIFO_NORMAL |
+	    SCR_TXSEL_NORMAL | SCR_USRC_SEL_CHIP | (2 << SCR_TXFIFO_ESEL_BIT);
+	__raw_writel(regval, SPDIF_REG_SCR + spdif_base_addr);
+
+	/* Default clock source from EXTAL, divider by 8, generate 44.1kHz
+	   sample rate */
+	regval = 0x07;
+	__raw_writel(regval, SPDIF_REG_STC + spdif_base_addr);
+
+}
+
+/*!
+ * @brief deinitialize spdif module
+ *
+ * This function is called to stop the spdif
+ */
+static void spdif_tx_uninit(void)
+{
+	unsigned long regval;
+
+	regval = __raw_readl(SPDIF_REG_SCR + spdif_base_addr) & 0xffffe3;
+	regval |= SCR_TXSEL_OFF;
+	__raw_writel(regval, SPDIF_REG_SCR + spdif_base_addr);
+	regval = __raw_readl(SPDIF_REG_STC + spdif_base_addr) & ~0x7FF;
+	regval |= (0x7 << STC_TXCLK_SRC_OFFSET);
+	__raw_writel(regval, SPDIF_REG_STC + spdif_base_addr);
+
+}
+
+static unsigned int spdif_playback_rates[] = { 32000, 44100, 48000 };
+static unsigned int spdif_capture_rates[] = {
+	16000, 32000, 44100, 48000, 64000, 96000
+};
+
+/*!
+  * this structure represents the sample rates supported
+  * by SPDIF
+  */
+static struct snd_pcm_hw_constraint_list hw_playback_rates_stereo = {
+	.count = ARRAY_SIZE(spdif_playback_rates),
+	.list = spdif_playback_rates,
+	.mask = 0,
+};
+
+static struct snd_pcm_hw_constraint_list hw_capture_rates_stereo = {
+	.count = ARRAY_SIZE(spdif_capture_rates),
+	.list = spdif_capture_rates,
+	.mask = 0,
+};
+
+/*!
+ * This structure reprensents the capabilities of the driver
+ * in playback mode.
+ */
+static struct snd_pcm_hardware snd_spdif_playback_hw = {
+	.info =
+	    (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+	     SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_HALF_DUPLEX |
+	     SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE |
+	     SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |
+	    SNDRV_PCM_FMTBIT_S24_LE,
+	.rates =
+	    SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
+	.rate_min = 32000,
+	.rate_max = 48000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = SPDIF_MAX_BUF_SIZE,
+	.period_bytes_min = SPDIF_MIN_PERIOD_SIZE,
+	.period_bytes_max = SPDIF_DMA_BUF_SIZE,
+	.periods_min = SPDIF_MIN_PERIOD,
+	.periods_max = SPDIF_MAX_PERIOD,
+	.fifo_size = 0,
+};
+
+/*!
+ * This structure reprensents the capabilities of the driver
+ * in capture mode.
+ */
+static struct snd_pcm_hardware snd_spdif_capture_hw = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED |
+		 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP |
+		 SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
+	.formats = SNDRV_PCM_FMTBIT_S24_LE,
+	.rates =
+	    (SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100
+	     | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 |
+	     SNDRV_PCM_RATE_96000),
+	.rate_min = 16000,
+	.rate_max = 96000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = SPDIF_MAX_BUF_SIZE,
+	.period_bytes_min = SPDIF_MIN_PERIOD_SIZE,
+	.period_bytes_max = SPDIF_DMA_BUF_SIZE,
+	.periods_min = SPDIF_MIN_PERIOD,
+	.periods_max = SPDIF_MAX_PERIOD,
+	.fifo_size = 0,
+
+};
+
+/*!
+  * This function configures the DMA channel used to transfer
+  * audio from MCU to SPDIF or from SPDIF to MCU
+  *
+  * @param	s	pointer to the structure of the current stream.
+  * @param      callback        pointer to function that will be
+  *                              called when a SDMA TX transfer finishes.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+spdif_configure_dma_channel(struct mxc_spdif_stream *s,
+			    mxc_dma_callback_t callback)
+{
+	int ret = -1;
+	int channel = -1;
+
+	if (s->dma_wchannel != 0)
+		mxc_dma_free(s->dma_wchannel);
+
+	if (s->stream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+
+		if (s->stream->runtime->sample_bits > 16) {
+			channel =
+			    mxc_dma_request(MXC_DMA_SPDIF_32BIT_TX,
+					    "SPDIF TX DMA");
+		} else {
+			channel =
+			    mxc_dma_request(MXC_DMA_SPDIF_16BIT_TX,
+					    "SPDIF TX DMA");
+		}
+
+	} else if (s->stream->stream == SNDRV_PCM_STREAM_CAPTURE) {
+
+		channel = mxc_dma_request(MXC_DMA_SPDIF_32BIT_RX,
+					  "SPDIF RX DMA");
+
+	}
+
+	pr_debug("spdif_configure_dma_channel: %d\n", channel);
+
+	ret = mxc_dma_callback_set(channel,
+				   (mxc_dma_callback_t) callback, (void *)s);
+	if (ret != 0) {
+		pr_info("spdif_configure_dma_channel - err\n");
+		mxc_dma_free(channel);
+		return -1;
+	}
+	s->dma_wchannel = channel;
+	return 0;
+}
+
+/*!
+  * This function gets the dma pointer position during playback/capture.
+  * Our DMA implementation does not allow to retrieve this position
+  * when a transfert is active, so, it answers the middle of
+  * the current period beeing transfered
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static u_int spdif_get_dma_pos(struct mxc_spdif_stream *s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int offset = 0;
+	substream = s->stream;
+	runtime = substream->runtime;
+
+	offset = (runtime->period_size * (s->periods));
+	if (offset >= runtime->buffer_size)
+		offset = 0;
+	pr_debug
+	    ("MXC: spdif_get_dma_pos BIS offset  %d, buffer_size %d\n",
+	     offset, (int)runtime->buffer_size);
+	return offset;
+}
+
+/*!
+  * This function stops the current dma transfert for playback
+  * and clears the dma pointers.
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static void spdif_stop_tx(struct mxc_spdif_stream *s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int offset;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * s->periods;
+
+	s->active = 0;
+	s->period = 0;
+	s->periods = 0;
+
+	/* this stops the dma channel and clears the buffer ptrs */
+	mxc_dma_disable(s->dma_wchannel);
+	spdif_dma_enable(SCR_DMA_TX_EN, 0);
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_TO_DEVICE);
+}
+
+/*!
+  * This function is called whenever a new audio block needs to be
+  * transferred to SPDIF. The function receives the address and the size
+  * of the new block and start a new DMA transfer.
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static void spdif_start_tx(struct mxc_spdif_stream *s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size = 0;
+	unsigned int offset;
+	int ret = 0;
+	mxc_dma_requestbuf_t dma_request;
+	substream = s->stream;
+	runtime = substream->runtime;
+	memset(&dma_request, 0, sizeof(mxc_dma_requestbuf_t));
+	if (s->active) {
+		dma_size = frames_to_bytes(runtime, runtime->period_size);
+		offset = dma_size * s->period;
+		dma_request.src_addr =
+		    (dma_addr_t) (dma_map_single
+				  (NULL, runtime->dma_area + offset, dma_size,
+				   DMA_TO_DEVICE));
+
+		dma_request.dst_addr = (dma_addr_t) (SPDIF_BASE_ADDR + 0x2c);
+
+		dma_request.num_of_bytes = dma_size;
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_WRITE);
+		ret = mxc_dma_enable(s->dma_wchannel);
+		spdif_dma_enable(SCR_DMA_TX_EN, 1);
+		if (ret) {
+			pr_info("audio_process_dma: cannot queue DMA \
+				buffer\n");
+			return;
+		}
+		s->period++;
+		s->period %= runtime->periods;
+
+		if ((s->period > s->periods)
+		    && ((s->period - s->periods) > 1)) {
+			pr_debug("audio playback chain dma: already double \
+				buffered\n");
+			return;
+		}
+
+		if ((s->period < s->periods)
+		    && ((s->period + runtime->periods - s->periods) > 1)) {
+			pr_debug("audio playback chain dma: already double  \
+				buffered\n");
+			return;
+		}
+
+		if (s->period == s->periods) {
+			pr_debug("audio playback chain dma: s->period == \
+				s->periods\n");
+			return;
+		}
+
+		if (snd_pcm_playback_hw_avail(runtime) <
+		    2 * runtime->period_size) {
+			pr_debug("audio playback chain dma: available data \
+				is not enough\n");
+			return;
+		}
+
+		pr_debug
+		    ("audio playback chain dma:to set up the 2nd dma buffer\n");
+		pr_debug("SCR: 0x%08x\n",
+			 __raw_readl(spdif_base_addr + SPDIF_REG_SCR));
+
+		offset = dma_size * s->period;
+		dma_request.src_addr =
+		    (dma_addr_t) (dma_map_single
+				  (NULL, runtime->dma_area + offset, dma_size,
+				   DMA_TO_DEVICE));
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_WRITE);
+		ret = mxc_dma_enable(s->dma_wchannel);
+		s->period++;
+		s->period %= runtime->periods;
+
+	}
+	return;
+}
+
+/*!
+  * This is a callback which will be called
+  * when a TX transfer finishes. The call occurs
+  * in interrupt context.
+  *
+  * @param	data	pointer to the structure of the current stream
+  * @param	error	DMA error flag
+  * @param	count	number of bytes transfered by the DMA
+  */
+static void spdif_tx_callback(void *data, int error, unsigned int count)
+{
+	struct mxc_spdif_stream *s;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int previous_period;
+	unsigned int offset;
+	s = data;
+	substream = s->stream;
+	runtime = substream->runtime;
+	previous_period = s->periods;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * previous_period;
+
+	spin_lock(&s->dma_lock);
+	s->periods++;
+	s->periods %= runtime->periods;
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_TO_DEVICE);
+	spin_unlock(&s->dma_lock);
+
+	if (s->active)
+		snd_pcm_period_elapsed(s->stream);
+
+	spin_lock(&s->dma_lock);
+	spdif_start_tx(s);
+	spin_unlock(&s->dma_lock);
+}
+
+/*!
+  * This function is a dispatcher of command to be executed
+  * by the driver for playback.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	cmd		command to be executed
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+snd_mxc_spdif_playback_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct mxc_spdif_device *chip;
+	struct mxc_spdif_stream *s;
+	int err = 0;
+	unsigned long flags;
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[SNDRV_PCM_STREAM_PLAYBACK];
+
+	spin_lock_irqsave(&s->dma_lock, flags);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		s->active = 1;
+		spdif_start_tx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		spdif_stop_tx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		s->active = 0;
+		s->periods = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_RESUME:
+		s->active = 1;
+		spdif_start_tx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		s->active = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		s->active = 1;
+		spdif_start_tx(s);
+		break;
+	default:
+		err = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&s->dma_lock, flags);
+	return err;
+}
+
+/*!
+  * This function configures the hardware to allow audio
+  * playback operations. It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_spdif_playback_prepare(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct snd_pcm_runtime *runtime;
+	int err;
+	unsigned int ch_status;
+
+	chip = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+
+	spdif_tx_init();
+
+	ch_status =
+	    ((mxc_spdif_control.ch_status[2] << 16) | (mxc_spdif_control.
+						       ch_status[1] << 8) |
+	     mxc_spdif_control.ch_status[0]);
+	spdif_set_channel_status(ch_status, SPDIF_REG_STCSCH);
+	ch_status = mxc_spdif_control.ch_status[3];
+	spdif_set_channel_status(ch_status, SPDIF_REG_STCSCL);
+	spdif_intr_enable(INT_TXFIFO_RESYNC, 1);
+	spdif_set_sample_rate(chip->spdif_txclk_44100, chip->spdif_txclk_48000,
+			      runtime->rate);
+	spdif_set_clk_accuracy(SPDIF_CLK_ACCURACY_LEV2);
+	/* setup DMA controller for spdif tx */
+	err = spdif_configure_dma_channel(&chip->
+					  s[SNDRV_PCM_STREAM_PLAYBACK],
+					  spdif_tx_callback);
+	if (err < 0) {
+		pr_info("snd_mxc_spdif_playback_prepare - err < 0\n");
+		return err;
+	}
+
+	/**
+	 * FIXME: dump registers
+	 */
+	pr_debug("SCR: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SCR));
+	pr_debug("SIE: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SIE));
+	pr_debug("STC: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_STC));
+	return 0;
+}
+
+/*!
+  * This function gets the current playback pointer position.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static snd_pcm_uframes_t
+snd_mxc_spdif_playback_pointer(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	chip = snd_pcm_substream_chip(substream);
+	return spdif_get_dma_pos(&chip->s[SNDRV_PCM_STREAM_PLAYBACK]);
+}
+
+static int snd_card_mxc_spdif_playback_open(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct snd_pcm_runtime *runtime;
+	int err;
+	struct mxc_spdif_platform_data *spdif_data;
+
+	chip = snd_pcm_substream_chip(substream);
+
+	spdif_data = chip->card->dev->platform_data;
+	/* enable tx clock */
+	clk_enable(spdif_data->spdif_clk);
+
+	runtime = substream->runtime;
+	chip->s[SNDRV_PCM_STREAM_PLAYBACK].stream = substream;
+	runtime->hw = snd_spdif_playback_hw;
+	err = snd_pcm_hw_constraint_list(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_RATE,
+					 &hw_playback_rates_stereo);
+	if (err < 0)
+		goto failed;
+	err =
+	    snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (err < 0)
+		goto failed;
+
+	return 0;
+      failed:
+	clk_disable(spdif_data->spdif_clk);
+	return err;
+}
+
+/*!
+  * This function closes an spdif device for playback.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_spdif_playback_close(struct snd_pcm_substream
+					     *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct mxc_spdif_platform_data *spdif_data;
+
+	chip = snd_pcm_substream_chip(substream);
+	spdif_data = chip->card->dev->platform_data;
+
+	pr_debug("SIS: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SIS));
+
+	spdif_intr_status();
+	spdif_intr_enable(INT_TXFIFO_RESYNC, 0);
+	spdif_tx_uninit();
+	clk_disable(spdif_data->spdif_clk);
+	mxc_dma_free(chip->s[SNDRV_PCM_STREAM_PLAYBACK].dma_wchannel);
+	chip->s[SNDRV_PCM_STREAM_PLAYBACK].dma_wchannel = 0;
+
+	return 0;
+}
+
+/*! TODO: update the dma start/stop callback routine
+  * This function stops the current dma transfert for capture
+  * and clears the dma pointers.
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static void spdif_stop_rx(struct mxc_spdif_stream *s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int offset;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * s->periods;
+
+	s->active = 0;
+	s->period = 0;
+	s->periods = 0;
+
+	/* this stops the dma channel and clears the buffer ptrs */
+	mxc_dma_disable(s->dma_wchannel);
+	spdif_dma_enable(SCR_DMA_RX_EN, 0);
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_FROM_DEVICE);
+}
+
+/*!
+  * This function is called whenever a new audio block needs to be
+  * received from SPDIF. The function receives the address and the size
+  * of the new block and start a new DMA transfer.
+  *
+  * @param	s	pointer to the structure of the current stream.
+  *
+  */
+static void spdif_start_rx(struct mxc_spdif_stream *s)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size = 0;
+	unsigned int offset;
+	int ret = 0;
+	mxc_dma_requestbuf_t dma_request;
+
+	substream = s->stream;
+	runtime = substream->runtime;
+	memset(&dma_request, 0, sizeof(mxc_dma_requestbuf_t));
+
+	if (s->active) {
+		dma_size = frames_to_bytes(runtime, runtime->period_size);
+		pr_debug("s->period (%x) runtime->periods (%d)\n",
+			 s->period, runtime->periods);
+		pr_debug("runtime->period_size (%d) dma_size (%d)\n",
+			 (unsigned int)runtime->period_size,
+			 runtime->dma_bytes);
+
+		offset = dma_size * s->period;
+		dma_request.dst_addr =
+		    (dma_addr_t) (dma_map_single
+				  (NULL, runtime->dma_area + offset, dma_size,
+				   DMA_FROM_DEVICE));
+
+		dma_request.src_addr =
+		    (dma_addr_t) (SPDIF_BASE_ADDR + SPDIF_REG_SRL);
+		dma_request.num_of_bytes = dma_size;
+		/* config and enable sdma for RX */
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_READ);
+		ret = mxc_dma_enable(s->dma_wchannel);
+		/* enable SPDIF dma */
+		spdif_dma_enable(SCR_DMA_RX_EN, 1);
+
+		if (ret) {
+			pr_info("audio_process_dma: cannot queue DMA \
+				buffer\n");
+			return;
+		}
+		s->period++;
+		s->period %= runtime->periods;
+
+		if ((s->period > s->periods)
+		    && ((s->period - s->periods) > 1)) {
+			pr_debug("audio capture chain dma: already double \
+				buffered\n");
+			return;
+		}
+
+		if ((s->period < s->periods)
+		    && ((s->period + runtime->periods - s->periods) > 1)) {
+			pr_debug("audio capture chain dma: already double  \
+				buffered\n");
+			return;
+		}
+
+		if (s->period == s->periods) {
+			pr_debug("audio capture chain dma: s->period == \
+				s->periods\n");
+			return;
+		}
+
+		if (snd_pcm_capture_hw_avail(runtime) <
+		    2 * runtime->period_size) {
+			pr_debug("audio capture chain dma: available data \
+				is not enough\n");
+			return;
+		}
+
+		pr_debug
+		    ("audio playback chain dma:to set up the 2nd dma buffer\n");
+
+		offset = dma_size * s->period;
+		dma_request.dst_addr =
+		    (dma_addr_t) (dma_map_single
+				  (NULL, runtime->dma_area + offset, dma_size,
+				   DMA_FROM_DEVICE));
+		mxc_dma_config(s->dma_wchannel, &dma_request, 1,
+			       MXC_DMA_MODE_READ);
+		ret = mxc_dma_enable(s->dma_wchannel);
+		s->period++;
+		s->period %= runtime->periods;
+
+	}
+	return;
+}
+
+/*!
+  * This is a callback which will be called
+  * when a RX transfer finishes. The call occurs
+  * in interrupt context.
+  *
+  * @param	data	pointer to the structure of the current stream
+  * @param	error	DMA error flag
+  * @param	count	number of bytes transfered by the DMA
+  */
+static void spdif_rx_callback(void *data, int error, unsigned int count)
+{
+	struct mxc_spdif_stream *s;
+	struct snd_pcm_substream *substream;
+	struct snd_pcm_runtime *runtime;
+	unsigned int dma_size;
+	unsigned int previous_period;
+	unsigned int offset;
+
+	s = data;
+	substream = s->stream;
+	runtime = substream->runtime;
+	previous_period = s->periods;
+	dma_size = frames_to_bytes(runtime, runtime->period_size);
+	offset = dma_size * previous_period;
+
+	spin_lock(&s->dma_lock);
+	s->periods++;
+	s->periods %= runtime->periods;
+
+	dma_unmap_single(NULL, runtime->dma_addr + offset, dma_size,
+			 DMA_FROM_DEVICE);
+	spin_unlock(&s->dma_lock);
+
+	if (s->active)
+		snd_pcm_period_elapsed(s->stream);
+	spin_lock(&s->dma_lock);
+	spdif_start_rx(s);
+	spin_unlock(&s->dma_lock);
+}
+
+/*!
+  * This function is a dispatcher of command to be executed
+  * by the driver for capture.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	cmd		command to be executed
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int
+snd_mxc_spdif_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct mxc_spdif_device *chip;
+	struct mxc_spdif_stream *s;
+	int err = 0;
+	unsigned long flags;
+	chip = snd_pcm_substream_chip(substream);
+	s = &chip->s[SNDRV_PCM_STREAM_CAPTURE];
+
+	spin_lock_irqsave(&s->dma_lock, flags);
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		s->active = 1;
+		spdif_start_rx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		spdif_stop_rx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		s->active = 0;
+		s->periods = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_RESUME:
+		s->active = 1;
+		spdif_start_rx(s);
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		s->active = 0;
+		break;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		s->active = 1;
+		spdif_start_rx(s);
+		break;
+	default:
+		err = -EINVAL;
+		break;
+	}
+	spin_unlock_irqrestore(&s->dma_lock, flags);
+	return err;
+}
+
+/*!
+  * This function configures the hardware to allow audio
+  * capture operations. It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_spdif_capture_prepare(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct mxc_spdif_platform_data *spdif_data;
+	struct snd_pcm_runtime *runtime;
+	int err;
+
+	chip = snd_pcm_substream_chip(substream);
+	runtime = substream->runtime;
+	spdif_data = chip->card->dev->platform_data;
+
+	spdif_rx_init();
+	/* enable interrupts, include DPLL lock */
+	spdif_intr_enable(INT_SYM_ERR | INT_BIT_ERR | INT_URX_FUL |
+			  INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |
+			  INT_UQ_SYNC | INT_UQ_ERR | INT_RX_RESYNC |
+			  INT_LOSS_LOCK, 1);
+
+	/* setup rx clock source */
+	spdif_set_rx_clksrc(spdif_data->spdif_clkid, SPDIF_DEFAULT_GAINSEL, 1);
+
+	/* setup DMA controller for spdif rx */
+	err = spdif_configure_dma_channel(&chip->
+					  s[SNDRV_PCM_STREAM_CAPTURE],
+					  spdif_rx_callback);
+	if (err < 0) {
+		pr_info("snd_mxc_spdif_playback_prepare - err < 0\n");
+		return err;
+	}
+
+	/* Debug: dump registers */
+	pr_debug("SCR: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SCR));
+	pr_debug("SIE: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SIE));
+	pr_debug("SRPC: 0x%08x\n",
+		 __raw_readl(spdif_base_addr + SPDIF_REG_SRPC));
+	pr_debug("FreqMeas: 0x%08x\n",
+		 __raw_readl(spdif_base_addr + SPDIF_REG_SRFM));
+
+	return 0;
+}
+
+/*!
+  * This function gets the current capture pointer position.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  */
+static snd_pcm_uframes_t
+snd_mxc_spdif_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	chip = snd_pcm_substream_chip(substream);
+	return spdif_get_dma_pos(&chip->s[SNDRV_PCM_STREAM_CAPTURE]);
+}
+
+/*!
+  * This function opens a spdif device in capture mode
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_spdif_capture_open(struct snd_pcm_substream *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct snd_pcm_runtime *runtime;
+	int err = 0;
+	struct mxc_spdif_platform_data *spdif_data;
+
+	chip = snd_pcm_substream_chip(substream);
+
+	spdif_data = chip->card->dev->platform_data;
+	/* enable rx bus clock */
+	clk_enable(spdif_data->spdif_clk);
+
+	runtime = substream->runtime;
+	chip->s[SNDRV_PCM_STREAM_CAPTURE].stream = substream;
+	runtime->hw = snd_spdif_capture_hw;
+
+	/* set hw param constraints */
+	err = snd_pcm_hw_constraint_list(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_RATE,
+					 &hw_capture_rates_stereo);
+	if (err < 0)
+		goto failed;
+	err =
+	    snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	if (err < 0)
+		goto failed;
+
+	/* enable spdif dpll lock interrupt */
+	spdif_intr_enable(INT_DPLL_LOCKED, 1);
+
+	return 0;
+
+      failed:
+	clk_disable(spdif_data->spdif_clk);
+	return err;
+}
+
+/*!
+  * This function closes an spdif device for capture.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_spdif_capture_close(struct snd_pcm_substream
+					    *substream)
+{
+	struct mxc_spdif_device *chip;
+	struct mxc_spdif_platform_data *spdif_data;
+
+	chip = snd_pcm_substream_chip(substream);
+	spdif_data = chip->card->dev->platform_data;
+
+	pr_debug("SIS: 0x%08x\n", __raw_readl(spdif_base_addr + SPDIF_REG_SIS));
+	pr_debug("SRPC: 0x%08x\n",
+		 __raw_readl(spdif_base_addr + SPDIF_REG_SRPC));
+	pr_debug("FreqMeas: 0x%08x\n",
+		 __raw_readl(spdif_base_addr + SPDIF_REG_SRFM));
+
+	spdif_intr_enable(INT_DPLL_LOCKED | INT_SYM_ERR | INT_BIT_ERR |
+			  INT_URX_FUL | INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |
+			  INT_UQ_SYNC | INT_UQ_ERR | INT_RX_RESYNC |
+			  INT_LOSS_LOCK, 0);
+	spdif_rx_uninit();
+	clk_disable(spdif_data->spdif_clk);
+	mxc_dma_free(chip->s[SNDRV_PCM_STREAM_CAPTURE].dma_wchannel);
+	chip->s[SNDRV_PCM_STREAM_CAPTURE].dma_wchannel = 0;
+	return 0;
+}
+
+/*!
+  * This function configure the Audio HW in terms of memory allocation.
+  * It is called by ALSA framework.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  * @param	hw_params	Pointer to hardware paramters structure
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_spdif_hw_params(struct snd_pcm_substream
+				   *substream, struct snd_pcm_hw_params
+				   *hw_params)
+{
+	struct snd_pcm_runtime *runtime;
+	int ret = 0;
+	runtime = substream->runtime;
+	ret =
+	    snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	if (ret < 0) {
+		pr_info("snd_mxc_spdif_hw_params - ret: %d\n", ret);
+		return ret;
+	}
+	runtime->dma_addr = virt_to_phys(runtime->dma_area);
+	return ret;
+}
+
+/*!
+  * This function frees the spdif hardware at the end of playback.
+  *
+  * @param	substream	pointer to the structure of the current stream.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_mxc_spdif_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+/*!
+  * This structure is the list of operation that the driver
+  * must provide for the playback interface
+  */
+static struct snd_pcm_ops snd_card_mxc_spdif_playback_ops = {
+	.open = snd_card_mxc_spdif_playback_open,
+	.close = snd_card_mxc_spdif_playback_close,
+	.ioctl = snd_pcm_lib_ioctl,
+	.hw_params = snd_mxc_spdif_hw_params,
+	.hw_free = snd_mxc_spdif_hw_free,
+	.prepare = snd_mxc_spdif_playback_prepare,
+	.trigger = snd_mxc_spdif_playback_trigger,
+	.pointer = snd_mxc_spdif_playback_pointer,
+};
+
+static struct snd_pcm_ops snd_card_mxc_spdif_capture_ops = {
+	.open = snd_card_mxc_spdif_capture_open,
+	.close = snd_card_mxc_spdif_capture_close,
+	.ioctl = snd_pcm_lib_ioctl,
+	.hw_params = snd_mxc_spdif_hw_params,
+	.hw_free = snd_mxc_spdif_hw_free,
+	.prepare = snd_mxc_spdif_capture_prepare,
+	.trigger = snd_mxc_spdif_capture_trigger,
+	.pointer = snd_mxc_spdif_capture_pointer,
+};
+
+/*!
+  * This functions initializes the playback audio device supported by
+  * spdif
+  *
+  * @param	mxc_spdif	pointer to the sound card structure.
+  *
+  */
+void mxc_init_spdif_device(struct mxc_spdif_device *mxc_spdif)
+{
+
+	/* initial spinlock for control data */
+	spin_lock_init(&mxc_spdif_control.ctl_lock);
+
+	if (mxc_spdif->mxc_spdif_tx) {
+
+		mxc_spdif->s[SNDRV_PCM_STREAM_PLAYBACK].id = "spdif tx";
+		/* init tx channel status default value */
+		mxc_spdif_control.ch_status[0] =
+		    IEC958_AES0_CON_NOT_COPYRIGHT |
+		    IEC958_AES0_CON_EMPHASIS_5015;
+		mxc_spdif_control.ch_status[1] = IEC958_AES1_CON_DIGDIGCONV_ID;
+		mxc_spdif_control.ch_status[2] = 0x00;
+		mxc_spdif_control.ch_status[3] =
+		    IEC958_AES3_CON_FS_44100 | IEC958_AES3_CON_CLOCK_1000PPM;
+	}
+	if (mxc_spdif->mxc_spdif_rx) {
+
+		/* TODO: Add code here if capture is available */
+		mxc_spdif->s[SNDRV_PCM_STREAM_CAPTURE].id = "spdif rx";
+	}
+
+}
+
+/*!
+ * MXC SPDIF IEC958 controller(mixer) functions
+ *
+ * 	Channel status get/put control
+ * 	User bit value get/put control
+ * 	Valid bit value get control
+ * 	DPLL lock status get control
+ * 	User bit sync mode selection control
+ *
+ */
+static int mxc_pb_spdif_info(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+	uinfo->count = 1;
+	return 0;
+}
+
+static int mxc_pb_spdif_get(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *uvalue)
+{
+	uvalue->value.iec958.status[0] = mxc_spdif_control.ch_status[0];
+	uvalue->value.iec958.status[1] = mxc_spdif_control.ch_status[1];
+	uvalue->value.iec958.status[2] = mxc_spdif_control.ch_status[2];
+	uvalue->value.iec958.status[3] = mxc_spdif_control.ch_status[3];
+	return 0;
+}
+
+static int mxc_pb_spdif_put(struct snd_kcontrol *kcontrol,
+			    struct snd_ctl_elem_value *uvalue)
+{
+	unsigned int ch_status;
+	mxc_spdif_control.ch_status[0] = uvalue->value.iec958.status[0];
+	mxc_spdif_control.ch_status[1] = uvalue->value.iec958.status[1];
+	mxc_spdif_control.ch_status[2] = uvalue->value.iec958.status[2];
+	mxc_spdif_control.ch_status[3] = uvalue->value.iec958.status[3];
+	ch_status =
+	    ((mxc_spdif_control.ch_status[2] << 16) | (mxc_spdif_control.
+						       ch_status[1] << 8) |
+	     mxc_spdif_control.ch_status[0]);
+	spdif_set_channel_status(ch_status, SPDIF_REG_STCSCH);
+	ch_status = mxc_spdif_control.ch_status[3];
+	spdif_set_channel_status(ch_status, SPDIF_REG_STCSCL);
+	return 0;
+}
+
+static int snd_mxc_spdif_info(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+	uinfo->count = 1;
+	return 0;
+}
+
+/*!
+ * Get channel status from SPDIF_RX_CCHAN register
+ */
+static int snd_mxc_spdif_capture_get(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned int cstatus;
+
+	if (!(__raw_readl(spdif_base_addr + SPDIF_REG_SIS) & INT_CNEW))
+		return -EAGAIN;
+
+	cstatus = __raw_readl(spdif_base_addr + SPDIF_REG_SRCSLH);
+	ucontrol->value.iec958.status[0] = (cstatus >> 16) & 0xFF;
+	ucontrol->value.iec958.status[1] = (cstatus >> 8) & 0xFF;
+	ucontrol->value.iec958.status[2] = cstatus & 0xFF;
+	cstatus = __raw_readl(spdif_base_addr + SPDIF_REG_SRCSLL);
+	ucontrol->value.iec958.status[3] = (cstatus >> 16) & 0xFF;
+	ucontrol->value.iec958.status[4] = (cstatus >> 8) & 0xFF;
+	ucontrol->value.iec958.status[5] = cstatus & 0xFF;
+
+	/* clear intr */
+	__raw_writel(INT_CNEW, spdif_base_addr + SPDIF_REG_SIC);
+
+	return 0;
+}
+
+/*!
+ * Get User bits (subcode) from chip value which readed out
+ * in UChannel register.
+ */
+static int snd_mxc_spdif_subcode_get(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&mxc_spdif_control.ctl_lock, flags);
+	if (mxc_spdif_control.ready_buf) {
+		memcpy(&ucontrol->value.iec958.subcode[0],
+		       &mxc_spdif_control.
+		       subcode[(mxc_spdif_control.ready_buf -
+				1) * SPDIF_UBITS_SIZE], SPDIF_UBITS_SIZE);
+	} else {
+		ret = -EAGAIN;
+	}
+	spin_unlock_irqrestore(&mxc_spdif_control.ctl_lock, flags);
+
+	return ret;
+}
+
+/*!
+ * Q-subcode infomation.
+ * the byte size is SPDIF_UBITS_SIZE/8
+ */
+static int snd_mxc_spdif_qinfo(struct snd_kcontrol *kcontrol,
+			       struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+	uinfo->count = SPDIF_QSUB_SIZE;
+	return 0;
+}
+
+/*!
+ * Get Q subcode from chip value which readed out
+ * in QChannel register.
+ */
+static int snd_mxc_spdif_qget(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&mxc_spdif_control.ctl_lock, flags);
+	if (mxc_spdif_control.ready_buf) {
+		memcpy(&ucontrol->value.bytes.data[0],
+		       &mxc_spdif_control.
+		       qsub[(mxc_spdif_control.ready_buf -
+			     1) * SPDIF_QSUB_SIZE], SPDIF_QSUB_SIZE);
+	} else {
+		ret = -EAGAIN;
+	}
+	spin_unlock_irqrestore(&mxc_spdif_control.ctl_lock, flags);
+
+	return ret;
+}
+
+/*!
+ * Valid bit infomation.
+ */
+static int snd_mxc_spdif_vbit_info(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	return 0;
+}
+
+/*!
+ * Get valid good bit from interrupt status register.
+ */
+static int snd_mxc_spdif_vbit_get(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned int int_val;
+
+	int_val = __raw_readl(spdif_base_addr + SPDIF_REG_SIS);
+	ucontrol->value.integer.value[0] = (int_val & INT_VAL_NOGOOD) != 0;
+	__raw_writel(INT_VAL_NOGOOD, spdif_base_addr + SPDIF_REG_SIC);
+
+	return 0;
+}
+
+/*!
+ * DPLL lock infomation.
+ */
+static int snd_mxc_spdif_rxrate_info(struct snd_kcontrol *kcontrol,
+				     struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 16000;
+	uinfo->value.integer.max = 96000;
+	return 0;
+}
+
+/*!
+ * Get DPLL lock or not info from stable interrupt status register.
+ * User application must use this control to get locked,
+ * then can do next PCM operation
+ */
+static int snd_mxc_spdif_rxrate_get(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_value *ucontrol)
+{
+	struct mxc_spdif_device *chip = snd_kcontrol_chip(kcontrol);
+	struct mxc_spdif_platform_data *spdif_data;
+
+	spdif_data = chip->card->dev->platform_data;
+
+	if (atomic_read(&chip->dpll_locked)) {
+		ucontrol->value.integer.value[0] =
+		    spdif_get_rxclk_rate(spdif_data->spdif_clk,
+					 SPDIF_DEFAULT_GAINSEL);
+	} else {
+		ucontrol->value.integer.value[0] = 0;
+	}
+	return 0;
+}
+
+/*!
+ * User bit sync mode info
+ */
+static int snd_mxc_spdif_usync_info(struct snd_kcontrol *kcontrol,
+				    struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	return 0;
+}
+
+/*!
+ * User bit sync mode:
+ * 1 CD User channel subcode
+ * 0 Non-CD data
+ */
+static int snd_mxc_spdif_usync_get(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned int int_val;
+
+	int_val = __raw_readl(spdif_base_addr + SPDIF_REG_SRCD);
+	ucontrol->value.integer.value[0] = (int_val & SRCD_CD_USER) != 0;
+	return 0;
+}
+
+/*!
+ * User bit sync mode:
+ * 1 CD User channel subcode
+ * 0 Non-CD data
+ */
+static int snd_mxc_spdif_usync_put(struct snd_kcontrol *kcontrol,
+				   struct snd_ctl_elem_value *ucontrol)
+{
+	unsigned int int_val;
+
+	int_val = ucontrol->value.integer.value[0] << SRCD_CD_USER_OFFSET;
+	__raw_writel(int_val, spdif_base_addr + SPDIF_REG_SRCD);
+	return 0;
+}
+
+/*!
+ * MXC SPDIF IEC958 controller defines
+ */
+static struct snd_kcontrol_new snd_mxc_spdif_ctrls[] = {
+	/* status cchanel controller */
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE |
+	 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = mxc_pb_spdif_info,
+	 .get = mxc_pb_spdif_get,
+	 .put = mxc_pb_spdif_put,
+	 },
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_info,
+	 .get = snd_mxc_spdif_capture_get,
+	 },
+	/* user bits controller */
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = "IEC958 Subcode Capture Default",
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_info,
+	 .get = snd_mxc_spdif_subcode_get,
+	 },
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = "IEC958 Q-subcode Capture Default",
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_qinfo,
+	 .get = snd_mxc_spdif_qget,
+	 },
+	/* valid bit error controller */
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = "IEC958 V-Bit Errors",
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_vbit_info,
+	 .get = snd_mxc_spdif_vbit_get,
+	 },
+	/* DPLL lock info get controller */
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = "RX Sample Rate",
+	 .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_rxrate_info,
+	 .get = snd_mxc_spdif_rxrate_get,
+	 },
+	/* User bit sync mode set/get controller */
+	{
+	 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	 .name = "IEC958 USyncMode CDText",
+	 .access =
+	 SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_WRITE |
+	 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+	 .info = snd_mxc_spdif_usync_info,
+	 .get = snd_mxc_spdif_usync_get,
+	 .put = snd_mxc_spdif_usync_put,
+	 },
+};
+
+/*!
+  * This function the soundcard structure.
+  *
+  * @param	mxc_spdif	pointer to the sound card structure.
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int snd_card_mxc_spdif_pcm(struct mxc_spdif_device *mxc_spdif)
+{
+	struct snd_pcm *pcm;
+	int err;
+	err = snd_pcm_new(mxc_spdif->card, MXC_SPDIF_NAME, 0,
+			  mxc_spdif->mxc_spdif_tx,
+			  mxc_spdif->mxc_spdif_rx, &pcm);
+	if (err < 0)
+		return err;
+
+	snd_pcm_lib_preallocate_pages_for_all(pcm,
+					      SNDRV_DMA_TYPE_CONTINUOUS,
+					      snd_dma_continuous_data
+					      (GFP_KERNEL),
+					      SPDIF_MAX_BUF_SIZE * 2,
+					      SPDIF_MAX_BUF_SIZE * 2);
+	if (mxc_spdif->mxc_spdif_tx)
+		snd_pcm_set_ops(pcm,
+				SNDRV_PCM_STREAM_PLAYBACK,
+				&snd_card_mxc_spdif_playback_ops);
+	if (mxc_spdif->mxc_spdif_rx)
+		snd_pcm_set_ops(pcm,
+				SNDRV_PCM_STREAM_CAPTURE,
+				&snd_card_mxc_spdif_capture_ops);
+	pcm->private_data = mxc_spdif;
+	pcm->info_flags = 0;
+	strncpy(pcm->name, MXC_SPDIF_NAME, sizeof(pcm->name));
+	mxc_spdif->pcm = pcm;
+	mxc_init_spdif_device(mxc_spdif);
+	return 0;
+}
+
+extern void gpio_spdif_active(void);
+
+/*!
+  * This function initializes the driver in terms of memory of the soundcard
+  * and some basic HW clock settings.
+  *
+  * @param	pdev	Pointer to the platform device
+  * @return              0 on success, -1 otherwise.
+  */
+static int mxc_alsa_spdif_probe(struct platform_device
+				*pdev)
+{
+	int err, idx;
+	static int dev;
+	struct snd_card *card;
+	struct mxc_spdif_device *chip;
+	struct resource *res;
+	struct snd_kcontrol *kctl;
+	struct mxc_spdif_platform_data *plat_data;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENOENT;
+
+	if (dev >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	/* register the soundcard */
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
+			    sizeof(struct mxc_spdif_device));
+	if (card == NULL)
+		return -ENOMEM;
+	chip = card->private_data;
+	chip->card = card;
+	card->dev = &pdev->dev;
+	chip->reg_base = ioremap(res->start, res->end - res->start + 1);
+	spdif_base_addr = (unsigned long)chip->reg_base;
+	plat_data = (struct mxc_spdif_platform_data *)pdev->dev.platform_data;
+	chip->mxc_spdif_tx = plat_data->spdif_tx;
+	chip->mxc_spdif_rx = plat_data->spdif_rx;
+	chip->spdif_txclk_44100 = plat_data->spdif_clk_44100;
+	chip->spdif_txclk_48000 = plat_data->spdif_clk_48000;
+	atomic_set(&chip->dpll_locked, 0);
+
+	err = snd_card_mxc_spdif_pcm(chip);
+	if (err < 0)
+		goto nodev;
+
+	/*!
+	 * Add controls to the card
+	 */
+	for (idx = 0; idx < ARRAY_SIZE(snd_mxc_spdif_ctrls); idx++) {
+
+		kctl = snd_ctl_new1(&snd_mxc_spdif_ctrls[idx], chip);
+		if (kctl == NULL) {
+			err = -ENOMEM;
+			goto nodev;
+		}
+		/* check to add control to corresponding substream */
+		if (strstr(kctl->id.name, "Playback"))
+			kctl->id.device = 0;
+		else
+			kctl->id.device = 1;
+
+		err = snd_ctl_add(card, kctl);
+		if (err < 0)
+			goto nodev;
+	}
+
+	clk_enable(plat_data->spdif_core_clk);
+	/*!
+	 * SPDIF interrupt initialization
+	 * software reset to SPDIF
+	 */
+	spdif_softreset();
+	/* disable all the interrupts */
+	spdif_intr_enable(0xffffff, 0);
+	/* spdif interrupt register and disable */
+	if (request_irq(MXC_INT_SPDIF, spdif_isr, 0, "spdif", chip)) {
+		pr_err("MXC spdif: failed to request irq\n");
+		err = -EBUSY;
+		goto nodev;
+	}
+
+	if (chip->mxc_spdif_tx)
+		spin_lock_init(&chip->s[SNDRV_PCM_STREAM_PLAYBACK].dma_lock);
+	if (chip->mxc_spdif_rx)
+		spin_lock_init(&chip->s[SNDRV_PCM_STREAM_CAPTURE].dma_lock);
+	strcpy(card->driver, MXC_SPDIF_NAME);
+	strcpy(card->shortname, "MXC SPDIF TX/RX");
+	sprintf(card->longname, "MXC Freescale with SPDIF");
+
+	err = snd_card_register(card);
+	if (err == 0) {
+		pr_info("MXC spdif support initialized\n");
+		platform_set_drvdata(pdev, card);
+		gpio_spdif_active();
+		return 0;
+	}
+
+      nodev:
+	snd_card_free(card);
+	return err;
+}
+
+extern void gpio_spdif_inactive(void);
+
+/*!
+  * This function releases the sound card and unmap the io address
+  *
+  * @param      pdev    Pointer to the platform device
+  * @return              0 on success, -1 otherwise.
+  */
+
+static int mxc_alsa_spdif_remove(struct platform_device *pdev)
+{
+	struct mxc_spdif_device *chip;
+	struct snd_card *card;
+	struct mxc_spdif_platform_data *plat_data;
+
+	card = platform_get_drvdata(pdev);
+	plat_data = pdev->dev.platform_data;
+	chip = card->private_data;
+	free_irq(MXC_INT_SPDIF, chip);
+	iounmap(chip->reg_base);
+
+	snd_card_free(card);
+	platform_set_drvdata(pdev, NULL);
+
+	clk_disable(plat_data->spdif_core_clk);
+	gpio_spdif_inactive();
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+/*!
+  * This function suspends all active streams.
+  *
+  * TBD
+  *
+  * @param	card	pointer to the sound card structure.
+  * @param	state	requested state
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int mxc_alsa_spdif_suspend(struct platform_device *pdev,
+				  pm_message_t state)
+{
+	return 0;
+}
+
+/*!
+  * This function resumes all suspended streams.
+  *
+  * TBD
+  *
+  * @param	card	pointer to the sound card structure.
+  * @param	state	requested state
+  *
+  * @return              0 on success, -1 otherwise.
+  */
+static int mxc_alsa_spdif_resume(struct platform_device *pdev)
+{
+	return 0;
+}
+#endif
+
+static struct platform_driver mxc_alsa_spdif_driver = {
+	.probe = mxc_alsa_spdif_probe,
+	.remove = mxc_alsa_spdif_remove,
+#ifdef CONFIG_PM
+	.suspend = mxc_alsa_spdif_suspend,
+	.resume = mxc_alsa_spdif_resume,
+#endif
+	.driver = {
+		   .name = "mxc_alsa_spdif",
+		   },
+};
+
+/*!
+  * This function registers the sound driver structure.
+  *
+  */
+static int __init mxc_alsa_spdif_init(void)
+{
+	return platform_driver_register(&mxc_alsa_spdif_driver);
+}
+
+/*!
+  * This function frees the sound driver structure.
+  *
+  */
+static void __exit mxc_alsa_spdif_exit(void)
+{
+	platform_driver_unregister(&mxc_alsa_spdif_driver);
+}
+
+module_init(mxc_alsa_spdif_init);
+module_exit(mxc_alsa_spdif_exit);
+MODULE_AUTHOR("FREESCALE SEMICONDUCTOR");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MXC ALSA driver for SPDIF");