ENGR00153651-2 ESAI: Add esai/cs42888 audio codec support on mx6q platform

Add ESAI and related audio codec cs42888 support on mx6q platform.

Signed-off-by: Lionel Xu <R63889@freescale.com>

9 files changed, 2608 insertions, 1 deletions

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index fbd28480ebad..3ec3eb136d01 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -33,6 +33,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_MAX9877 if I2C
 	select SND_SOC_PCM3008
 	select SND_SOC_SGTL5000 if I2C
+	select SND_SOC_CS42888 if I2C
 	select SND_SOC_SPDIF
 	select SND_SOC_SSM2602 if I2C
 	select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
@@ -184,6 +185,10 @@ config SND_SOC_PCM3008
 config SND_SOC_SGTL5000
 	tristate
 
+#CLI CS42888 codec
+config SND_SOC_CS42888
+	tristate
+
 config SND_SOC_SPDIF
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 92bdee5b68a6..86cb162a0056 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -20,6 +20,7 @@ snd-soc-max98088-objs := max98088.o
 snd-soc-mxc-spdif-objs := mxc_spdif.o
 snd-soc-pcm3008-objs := pcm3008.o
 snd-soc-sgtl5000-objs := sgtl5000.o
+snd-soc-cs42888-objs := cs42888.o
 snd-soc-alc5623-objs := alc5623.o
 snd-soc-spdif-objs := spdif_transciever.o
 snd-soc-ssm2602-objs := ssm2602.o
@@ -103,6 +104,7 @@ obj-$(CONFIG_SND_SOC_MXC_SPDIF)	+= snd-soc-mxc-spdif.o
 obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o
 obj-$(CONFIG_SND_SOC_ALC5623)    += snd-soc-alc5623.o
 obj-$(CONFIG_SND_SOC_SGTL5000)  += snd-soc-sgtl5000.o
+obj-$(CONFIG_SND_SOC_CS42888)  += snd-soc-cs42888.o
 obj-$(CONFIG_SND_SOC_SPDIF)	+= snd-soc-spdif.o
 obj-$(CONFIG_SND_SOC_SSM2602)	+= snd-soc-ssm2602.o
 obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o
diff --git a/sound/soc/codecs/cs42888.c b/sound/soc/codecs/cs42888.c
new file mode 100644
index 000000000000..90894c007f9f
--- /dev/null
+++ b/sound/soc/codecs/cs42888.c
@@ -0,0 +1,1037 @@
+/*
+ * cs42888.c  -- CS42888 ALSA SoC Audio Driver
+ * Copyright (C) 2010-2011 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
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/fsl_devices.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+#include <sound/initval.h>
+#include <asm/div64.h>
+
+#include "cs42888.h"
+#define CS42888_NUM_SUPPLIES 4
+static const char *cs42888_supply_names[CS42888_NUM_SUPPLIES] = {
+	"VA",
+	"VD",
+	"VLS",
+	"VLC",
+};
+
+#define CS42888_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+/* CS42888 registers addresses */
+#define CS42888_CHIPID		0x01	/* Chip ID */
+#define CS42888_PWRCTL		0x02	/* Power Control */
+#define CS42888_MODE		0x03	/* Functional Mode */
+#define CS42888_FORMAT		0x04	/* Interface Formats */
+#define CS42888_ADCCTL		0x05	/* ADC Control */
+#define CS42888_TRANS		0x06	/* Transition Control */
+#define CS42888_MUTE		0x07	/* Mute Control */
+#define CS42888_VOLAOUT1	0x08	/* Volume Control AOUT1*/
+#define CS42888_VOLAOUT2	0x09	/* Volume Control AOUT2*/
+#define CS42888_VOLAOUT3	0x0A	/* Volume Control AOUT3*/
+#define CS42888_VOLAOUT4	0x0B	/* Volume Control AOUT4*/
+#define CS42888_VOLAOUT5	0x0C	/* Volume Control AOUT5*/
+#define CS42888_VOLAOUT6	0x0D	/* Volume Control AOUT6*/
+#define CS42888_VOLAOUT7	0x0E	/* Volume Control AOUT7*/
+#define CS42888_VOLAOUT8	0x0F	/* Volume Control AOUT8*/
+#define CS42888_DACINV		0x10	/* DAC Channel Invert */
+#define CS42888_VOLAIN1		0x11	/* Volume Control AIN1 */
+#define CS42888_VOLAIN2		0x12	/* Volume Control AIN2 */
+#define CS42888_VOLAIN3		0x13	/* Volume Control AIN3 */
+#define CS42888_VOLAIN4		0x14	/* Volume Control AIN4 */
+#define CS42888_ADCINV		0x17	/* ADC Channel Invert */
+#define CS42888_STATUSCTL	0x18	/* Status Control */
+#define CS42888_STATUS		0x19	/* Status */
+#define CS42888_STATUSMASK	0x1A	/* Status Mask */
+
+#define CS42888_FIRSTREG	0x01
+#define CS42888_LASTREG		0x1A
+#define CS42888_NUMREGS	(CS42888_LASTREG - CS42888_FIRSTREG + 1)
+#define CS42888_I2C_INCR	0x80
+
+/* Bit masks for the CS42888 registers */
+#define CS42888_CHIPID_ID_MASK	0xF0
+#define CS42888_CHIPID_REV	0x0F
+#define CS42888_PWRCTL_PDN_ADC2_OFFSET		6
+#define CS42888_PWRCTL_PDN_ADC1_OFFSET		5
+#define CS42888_PWRCTL_PDN_DAC4_OFFSET		4
+#define CS42888_PWRCTL_PDN_DAC3_OFFSET		3
+#define CS42888_PWRCTL_PDN_DAC2_OFFSET		2
+#define CS42888_PWRCTL_PDN_DAC1_OFFSET		1
+#define CS42888_PWRCTL_PDN_OFFSET		0
+#define CS42888_PWRCTL_PDN_ADC2_MASK	(1 << CS42888_PWRCTL_PDN_ADC2_OFFSET)
+#define CS42888_PWRCTL_PDN_ADC1_MASK	(1 << CS42888_PWRCTL_PDN_ADC1_OFFSET)
+#define CS42888_PWRCTL_PDN_DAC4_MASK	(1 << CS42888_PWRCTL_PDN_DAC4_OFFSET)
+#define CS42888_PWRCTL_PDN_DAC3_MASK	(1 << CS42888_PWRCTL_PDN_DAC3_OFFSET)
+#define CS42888_PWRCTL_PDN_DAC2_MASK	(1 << CS42888_PWRCTL_PDN_DAC2_OFFSET)
+#define CS42888_PWRCTL_PDN_DAC1_MASK	(1 << CS42888_PWRCTL_PDN_DAC1_OFFSET)
+#define CS42888_PWRCTL_PDN_MASK		(1 << CS42888_PWRCTL_PDN_OFFSET)
+
+#define CS42888_MODE_SPEED_MASK	0xF0
+#define CS42888_MODE_1X		0x00
+#define CS42888_MODE_2X		0x50
+#define CS42888_MODE_4X		0xA0
+#define CS42888_MODE_SLAVE	0xF0
+#define CS42888_MODE_DIV_MASK	0x0E
+#define CS42888_MODE_DIV1	0x00
+#define CS42888_MODE_DIV2	0x02
+#define CS42888_MODE_DIV3	0x04
+#define CS42888_MODE_DIV4	0x06
+#define CS42888_MODE_DIV5	0x08
+
+#define CS42888_FORMAT_FREEZE_OFFSET	7
+#define CS42888_FORMAT_AUX_DIF_OFFSET	6
+#define CS42888_FORMAT_DAC_DIF_OFFSET	3
+#define CS42888_FORMAT_ADC_DIF_OFFSET	0
+#define CS42888_FORMAT_FREEZE_MASK	(1 << CS42888_FORMAT_FREEZE_OFFSET)
+#define CS42888_FORMAT_AUX_DIF_MASK	(1 << CS42888_FORMAT_AUX_DIF_OFFSET)
+#define CS42888_FORMAT_DAC_DIF_MASK	(7 << CS42888_FORMAT_DAC_DIF_OFFSET)
+#define CS42888_FORMAT_ADC_DIF_MASK	(7 << CS42888_FORMAT_ADC_DIF_OFFSET)
+
+#define CS42888_TRANS_DAC_SNGVOL_OFFSET	    7
+#define CS42888_TRANS_DAC_SZC_OFFSET	    5
+#define CS42888_TRANS_AMUTE_OFFSET	    4
+#define CS42888_TRANS_MUTE_ADC_SP_OFFSET    3
+#define CS42888_TRANS_ADC_SNGVOL_OFFSET	    2
+#define CS42888_TRANS_ADC_SZC_OFFSET	    0
+#define CS42888_TRANS_DAC_SNGVOL_MASK	(1 << CS42888_TRANS_DAC_SNGVOL_OFFSET)
+#define CS42888_TRANS_DAC_SZC_MASK	(3 << CS42888_TRANS_DAC_SZC_OFFSET)
+#define CS42888_TRANS_AMUTE_MASK	(1 << CS42888_TRANS_AMUTE_OFFSET)
+#define CS42888_TRANS_MUTE_ADC_SP_MASK	(1 << CS42888_TRANS_MUTE_ADC_SP_OFFSET)
+#define CS42888_TRANS_ADC_SNGVOL_MASK	(1 << CS42888_TRANS_ADC_SNGVOL_OFFSET)
+#define CS42888_TRANS_ADC_SZC_MASK	(3 << CS42888_TRANS_ADC_SZC_OFFSET)
+
+#define CS42888_MUTE_AOUT8	(0x1 << 7)
+#define CS42888_MUTE_AOUT7	(0x1 << 6)
+#define CS42888_MUTE_AOUT6	(0x1 << 5)
+#define CS42888_MUTE_AOUT5	(0x1 << 4)
+#define CS42888_MUTE_AOUT4	(0x1 << 3)
+#define CS42888_MUTE_AOUT3	(0x1 << 2)
+#define CS42888_MUTE_AOUT2	(0x1 << 1)
+#define CS42888_MUTE_AOUT1	(0x1 << 0)
+#define CS42888_MUTE_ALL	(CS42888_MUTE_AOUT1 | CS42888_MUTE_AOUT2 | \
+				CS42888_MUTE_AOUT3 | CS42888_MUTE_AOUT4 | \
+				CS42888_MUTE_AOUT5 | CS42888_MUTE_AOUT6 | \
+				CS42888_MUTE_AOUT7 | CS42888_MUTE_AOUT8)
+
+#define DIF_LEFT_J		0
+#define DIF_I2S			1
+#define DIF_RIGHT_J		2
+#define DIF_TDM			6
+
+/* Private data for the CS42888 */
+struct cs42888_private {
+	struct snd_soc_codec codec;
+	u8 reg_cache[CS42888_NUMREGS + 1];
+	unsigned int mclk; /* Input frequency of the MCLK pin */
+	unsigned int mode; /* The mode (I2S or left-justified) */
+	unsigned int slave_mode;
+	unsigned int manual_mute;
+	struct regulator_bulk_data supplies[CS42888_NUM_SUPPLIES];
+};
+
+/**
+ * cs42888_fill_cache - pre-fill the CS42888 register cache.
+ * @codec: the codec for this CS42888
+ *
+ * This function fills in the CS42888 register cache by reading the register
+ * values from the hardware.
+ *
+ * This CS42888 registers are cached to avoid excessive I2C I/O operations.
+ * After the initial read to pre-fill the cache, the CS42888 never updates
+ * the register values, so we won't have a cache coherency problem.
+ *
+ * We use the auto-increment feature of the CS42888 to read all registers in
+ * one shot.
+ */
+static int cs42888_fill_cache(struct snd_soc_codec *codec)
+{
+	u8 *cache = codec->reg_cache;
+	struct i2c_client *i2c_client = codec->control_data;
+	s32 length;
+
+	length = i2c_smbus_read_i2c_block_data(i2c_client,
+		CS42888_FIRSTREG | CS42888_I2C_INCR, CS42888_NUMREGS, \
+		cache + 1);
+
+	if (length != CS42888_NUMREGS) {
+		dev_err(codec->dev, "i2c read failure, addr=0x%x\n",
+		       i2c_client->addr);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+
+#ifdef CS42888_DEBUG
+static void dump_reg(struct snd_soc_codec *codec)
+{
+	int i, reg;
+	int ret;
+	printk(KERN_DEBUG "dump begin\n");
+	printk(KERN_DEBUG "reg value in cache\n");
+	for (i = 0; i < CS42888_NUMREGS; i++)
+		printk(KERN_DEBUG "reg[%d] = 0x%x\n", i, cache[i]);
+
+	printk(KERN_DEBUG "real reg value\n");
+	ret = cs42888_fill_cache(codec);
+	if (ret < 0) {
+		pr_err("failed to fill register cache\n");
+		return ret;
+	}
+	for (i = 0; i < CS42888_NUMREGS; i++)
+		printk(KERN_DEBUG "reg[%d] = 0x%x\n", i, cache[i]);
+
+	printk(KERN_DEBUG "dump end\n");
+}
+#else
+static void dump_reg(struct snd_soc_codec *codec)
+{
+}
+#endif
+
+/* -127.5dB to 0dB with step of 0.5dB */
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
+/* -64dB to 24dB with step of 0.5dB */
+static const DECLARE_TLV_DB_SCALE(adc_tlv, -6400, 50, 1);
+
+static int cs42888_out_vu(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	unsigned int reg = mc->reg;
+	unsigned int reg2 = mc->rreg;
+	int ret;
+	u16 val;
+
+	ret = snd_soc_put_volsw_2r(kcontrol, ucontrol);
+	if (ret < 0)
+		return ret;
+
+	/* Now write again with the volume update bit set */
+	val = snd_soc_read(codec, reg);
+	ret = snd_soc_write(codec, reg, val);
+
+	val = snd_soc_read(codec, reg2);
+	ret = snd_soc_write(codec, reg2, val);
+	return 0;
+}
+
+int cs42888_info_volsw_s8(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_info *uinfo)
+{
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	int max = mc->max;
+	int min = mc->min;
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = max-min;
+	return 0;
+}
+
+int cs42888_get_volsw_s8(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	unsigned int reg = mc->reg;
+	unsigned int reg2 = mc->rreg;
+	int min = mc->min;
+	int val = snd_soc_read(codec, reg);
+
+	ucontrol->value.integer.value[0] =
+		((signed char)(val))-min;
+
+	val = snd_soc_read(codec, reg2);
+	ucontrol->value.integer.value[1] =
+		((signed char)(val))-min;
+	return 0;
+}
+
+int cs42888_put_volsw_s8(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
+	unsigned int reg = mc->reg;
+	unsigned int reg2 = mc->rreg;
+	int min = mc->min;
+	unsigned short val;
+	int ret;
+
+	val = (ucontrol->value.integer.value[0]+min);
+	ret = snd_soc_write(codec, reg, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	val = ((ucontrol->value.integer.value[1]+min));
+	ret = snd_soc_write(codec, reg2, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+#define SOC_CS42888_DOUBLE_R_TLV(xname, reg_left, reg_right, xshift, xmax, \
+				    xinvert, tlv_array)			\
+{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
+	.name = (xname), \
+	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
+		SNDRV_CTL_ELEM_ACCESS_READWRITE,  \
+	.tlv.p = (tlv_array), \
+	.info = snd_soc_info_volsw_2r, \
+	.get = snd_soc_get_volsw_2r, \
+	.put = cs42888_out_vu, \
+	.private_value = (unsigned long)&(struct soc_mixer_control) \
+		{.reg = reg_left, \
+		    .rreg = reg_right, \
+		    .shift = xshift, \
+		    .max = xmax, \
+		    .invert = xinvert} \
+}
+
+#define SOC_CS42888_DOUBLE_R_S8_TLV(xname, reg_left, reg_right, xmin, xmax, \
+				    tlv_array) \
+{	.iface  = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), \
+	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | \
+		  SNDRV_CTL_ELEM_ACCESS_READWRITE, \
+	.tlv.p  = (tlv_array), \
+	.info   = cs42888_info_volsw_s8, .get = cs42888_get_volsw_s8, \
+	.put    = cs42888_put_volsw_s8, \
+	.private_value = (unsigned long)&(struct soc_mixer_control) \
+		{.reg = reg_left, \
+		    .rreg = reg_right, \
+		    .min = xmin, \
+		    .max = xmax} \
+}
+
+static const char *cs42888_adcfilter[] = { "None", "High Pass" };
+static const char *cs42888_dacinvert[] = { "Disabled", "Enabled" };
+static const char *cs42888_adcinvert[] = { "Disabled", "Enabled" };
+static const char *cs42888_dacamute[] = { "Disabled", "AutoMute" };
+static const char *cs42888_dac_sngvol[] = { "Disabled", "Enabled" };
+static const char *cs42888_dac_szc[] = { "Immediate Change", "Zero Cross",
+				"Soft Ramp", "Soft Ramp on Zero Cross" };
+static const char *cs42888_mute_adc[] = { "UnMute", "Mute" };
+static const char *cs42888_adc_sngvol[] = { "Disabled", "Enabled" };
+static const char *cs42888_adc_szc[] = { "Immediate Change", "Zero Cross",
+				"Soft Ramp", "Soft Ramp on Zero Cross" };
+static const char *cs42888_dac_dem[] = { "No-De-Emphasis", "De-Emphasis" };
+static const char *cs42888_adc_single[] = { "Differential", "Single-Ended" };
+
+static const struct soc_enum cs42888_enum[] = {
+	SOC_ENUM_SINGLE(CS42888_ADCCTL, 7, 2, cs42888_adcfilter),
+	SOC_ENUM_DOUBLE(CS42888_DACINV, 0, 1, 2, cs42888_dacinvert),
+	SOC_ENUM_DOUBLE(CS42888_DACINV, 2, 3, 2, cs42888_dacinvert),
+	SOC_ENUM_DOUBLE(CS42888_DACINV, 4, 5, 2, cs42888_dacinvert),
+	SOC_ENUM_DOUBLE(CS42888_DACINV, 6, 7, 2, cs42888_dacinvert),
+	SOC_ENUM_DOUBLE(CS42888_ADCINV, 0, 1, 2, cs42888_adcinvert),
+	SOC_ENUM_DOUBLE(CS42888_ADCINV, 2, 3, 2, cs42888_adcinvert),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 4, 2, cs42888_dacamute),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 7, 2, cs42888_dac_sngvol),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 5, 4, cs42888_dac_szc),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 3, 2, cs42888_mute_adc),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 2, 2, cs42888_adc_sngvol),
+	SOC_ENUM_SINGLE(CS42888_TRANS, 0, 4, cs42888_adc_szc),
+	SOC_ENUM_SINGLE(CS42888_ADCCTL, 5, 2, cs42888_dac_dem),
+	SOC_ENUM_SINGLE(CS42888_ADCCTL, 4, 2, cs42888_adc_single),
+	SOC_ENUM_SINGLE(CS42888_ADCCTL, 3, 2, cs42888_adc_single),
+};
+
+static const struct snd_kcontrol_new cs42888_snd_controls[] = {
+SOC_CS42888_DOUBLE_R_TLV("DAC1 Playback Volume",
+			    CS42888_VOLAOUT1,
+			    CS42888_VOLAOUT2,
+			    0, 0xff, 1, dac_tlv),
+SOC_CS42888_DOUBLE_R_TLV("DAC2 Playback Volume",
+			    CS42888_VOLAOUT3,
+			    CS42888_VOLAOUT4,
+			    0, 0xff, 1, dac_tlv),
+SOC_CS42888_DOUBLE_R_TLV("DAC3 Playback Volume",
+			    CS42888_VOLAOUT5,
+			    CS42888_VOLAOUT6,
+			    0, 0xff, 1, dac_tlv),
+SOC_CS42888_DOUBLE_R_TLV("DAC4 Playback Volume",
+			    CS42888_VOLAOUT7,
+			    CS42888_VOLAOUT8,
+			    0, 0xff, 1, dac_tlv),
+SOC_CS42888_DOUBLE_R_S8_TLV("ADC1 Capture Volume",
+			    CS42888_VOLAIN1,
+			    CS42888_VOLAIN2,
+			    -128, 48, adc_tlv),
+SOC_CS42888_DOUBLE_R_S8_TLV("ADC2 Capture Volume",
+			    CS42888_VOLAIN3,
+			    CS42888_VOLAIN4,
+			    -128, 48, adc_tlv),
+SOC_ENUM("ADC High-Pass Filter Switch", cs42888_enum[0]),
+SOC_ENUM("DAC1 Invert Switch", cs42888_enum[1]),
+SOC_ENUM("DAC2 Invert Switch", cs42888_enum[2]),
+SOC_ENUM("DAC3 Invert Switch", cs42888_enum[3]),
+SOC_ENUM("DAC4 Invert Switch", cs42888_enum[4]),
+SOC_ENUM("ADC1 Invert Switch", cs42888_enum[5]),
+SOC_ENUM("ADC2 Invert Switch", cs42888_enum[6]),
+SOC_ENUM("DAC Auto Mute Switch", cs42888_enum[7]),
+SOC_ENUM("DAC Single Volume Control Switch", cs42888_enum[8]),
+SOC_ENUM("DAC Soft Ramp and Zero Cross Control Switch", cs42888_enum[9]),
+SOC_ENUM("Mute ADC Serial Port Switch", cs42888_enum[10]),
+SOC_ENUM("ADC Single Volume Control Switch", cs42888_enum[11]),
+SOC_ENUM("ADC Soft Ramp and Zero Cross Control Switch", cs42888_enum[12]),
+SOC_ENUM("DAC Deemphasis Switch", cs42888_enum[13]),
+SOC_ENUM("ADC1 Single Ended Mode Switch", cs42888_enum[14]),
+SOC_ENUM("ADC2 Single Ended Mode Switch", cs42888_enum[15]),
+};
+
+
+static const struct snd_soc_dapm_widget cs42888_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC1", "Playback", CS42888_PWRCTL, 1, 1),
+SND_SOC_DAPM_DAC("DAC2", "Playback", CS42888_PWRCTL, 2, 1),
+SND_SOC_DAPM_DAC("DAC3", "Playback", CS42888_PWRCTL, 3, 1),
+SND_SOC_DAPM_DAC("DAC4", "Playback", CS42888_PWRCTL, 4, 1),
+
+SND_SOC_DAPM_OUTPUT("AOUT1L"),
+SND_SOC_DAPM_OUTPUT("AOUT1R"),
+SND_SOC_DAPM_OUTPUT("AOUT2L"),
+SND_SOC_DAPM_OUTPUT("AOUT2R"),
+SND_SOC_DAPM_OUTPUT("AOUT3L"),
+SND_SOC_DAPM_OUTPUT("AOUT3R"),
+SND_SOC_DAPM_OUTPUT("AOUT4L"),
+SND_SOC_DAPM_OUTPUT("AOUT4R"),
+
+SND_SOC_DAPM_ADC("ADC1", "Capture", CS42888_PWRCTL, 5, 1),
+SND_SOC_DAPM_ADC("ADC2", "Capture", CS42888_PWRCTL, 6, 1),
+
+SND_SOC_DAPM_INPUT("AIN1L"),
+SND_SOC_DAPM_INPUT("AIN1R"),
+SND_SOC_DAPM_INPUT("AIN2L"),
+SND_SOC_DAPM_INPUT("AIN2R"),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	/* Playback */
+	{ "AOUT1L", NULL, "DAC1" },
+	{ "AOUT1R", NULL, "DAC1" },
+
+	{ "AOUT2L", NULL, "DAC2" },
+	{ "AOUT2R", NULL, "DAC2" },
+
+	{ "AOUT3L", NULL, "DAC3" },
+	{ "AOUT3R", NULL, "DAC3" },
+
+	{ "AOUT4L", NULL, "DAC4" },
+	{ "AOUT4R", NULL, "DAC4" },
+
+	/* Capture */
+	{ "ADC1", NULL, "AIN1L" },
+	{ "ADC1", NULL, "AIN1R" },
+
+	{ "ADC2", NULL, "AIN2L" },
+	{ "ADC2", NULL, "AIN2R" },
+};
+
+
+static int cs42888_add_widgets(struct snd_soc_codec *codec)
+{
+	snd_soc_dapm_new_controls(&codec->dapm, cs42888_dapm_widgets,
+				  ARRAY_SIZE(cs42888_dapm_widgets));
+
+	snd_soc_dapm_add_routes(&codec->dapm, audio_map, ARRAY_SIZE(audio_map));
+
+	snd_soc_dapm_new_widgets(&codec->dapm);
+	return 0;
+}
+
+/**
+ * struct cs42888_mode_ratios - clock ratio tables
+ * @ratio: the ratio of MCLK to the sample rate
+ * @speed_mode: the Speed Mode bits to set in the Mode Control register for
+ *              this ratio
+ * @mclk: the Ratio Select bits to set in the Mode Control register for this
+ *        ratio
+ *
+ * The data for this chart is taken from Table 10 of the CS42888 reference
+ * manual.
+ *
+ * This table is used to determine how to program the Functional Mode register.
+ * It is also used by cs42888_set_dai_sysclk() to tell ALSA which sampling
+ * rates the CS42888 currently supports.
+ *
+ * @speed_mode is the corresponding bit pattern to be written to the
+ * MODE bits of the Mode Control Register
+ *
+ * @mclk is the corresponding bit pattern to be wirten to the MCLK bits of
+ * the Mode Control Register.
+ *
+ */
+struct cs42888_mode_ratios {
+	unsigned int ratio;
+	u8 speed_mode;
+	u8 mclk;
+};
+
+static struct cs42888_mode_ratios cs42888_mode_ratios[] = {
+	{64, CS42888_MODE_4X, CS42888_MODE_DIV1},
+	{96, CS42888_MODE_4X, CS42888_MODE_DIV2},
+	{128, CS42888_MODE_2X, CS42888_MODE_DIV1},
+	{192, CS42888_MODE_2X, CS42888_MODE_DIV2},
+	{256, CS42888_MODE_1X, CS42888_MODE_DIV1},
+	{384, CS42888_MODE_2X, CS42888_MODE_DIV4},
+	{512, CS42888_MODE_1X, CS42888_MODE_DIV3},
+	{768, CS42888_MODE_1X, CS42888_MODE_DIV4},
+	{1024, CS42888_MODE_1X, CS42888_MODE_DIV5}
+};
+
+/* The number of MCLK/LRCK ratios supported by the CS42888 */
+#define NUM_MCLK_RATIOS		ARRAY_SIZE(cs42888_mode_ratios)
+
+/**
+ * cs42888_set_dai_sysclk - determine the CS42888 samples rates.
+ * @codec_dai: the codec DAI
+ * @clk_id: the clock ID (ignored)
+ * @freq: the MCLK input frequency
+ * @dir: the clock direction (ignored)
+ *
+ * This function is used to tell the codec driver what the input MCLK
+ * frequency is.
+ *
+ */
+static int cs42888_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+				 int clk_id, unsigned int freq, int dir)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct cs42888_private *cs42888 = snd_soc_codec_get_drvdata(codec);
+
+	cs42888->mclk = freq;
+	return 0;
+}
+
+/**
+ * cs42888_set_dai_fmt - configure the codec for the selected audio format
+ * @codec_dai: the codec DAI
+ * @format: a SND_SOC_DAIFMT_x value indicating the data format
+ *
+ * This function takes a bitmask of SND_SOC_DAIFMT_x bits and programs the
+ * codec accordingly.
+ *
+ * Currently, this function only supports SND_SOC_DAIFMT_I2S and
+ * SND_SOC_DAIFMT_LEFT_J.  The CS42888 codec also supports right-justified
+ * data for playback only, but ASoC currently does not support different
+ * formats for playback vs. record.
+ */
+static int cs42888_set_dai_fmt(struct snd_soc_dai *codec_dai,
+			      unsigned int format)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct cs42888_private *cs42888 =  snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+	u8 val;
+
+	val = snd_soc_read(codec, CS42888_FORMAT);
+	val &= ~CS42888_FORMAT_DAC_DIF_MASK;
+	val &= ~CS42888_FORMAT_ADC_DIF_MASK;
+	/* set DAI format */
+	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_LEFT_J:
+		val |= DIF_LEFT_J << CS42888_FORMAT_DAC_DIF_OFFSET;
+		val |= DIF_LEFT_J << CS42888_FORMAT_ADC_DIF_OFFSET;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		val |= DIF_I2S << CS42888_FORMAT_DAC_DIF_OFFSET;
+		val |= DIF_I2S << CS42888_FORMAT_ADC_DIF_OFFSET;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		val |= DIF_RIGHT_J << CS42888_FORMAT_DAC_DIF_OFFSET;
+		val |= DIF_RIGHT_J << CS42888_FORMAT_ADC_DIF_OFFSET;
+		break;
+	default:
+		dev_err(codec->dev, "invalid dai format\n");
+		ret = -EINVAL;
+		return ret;
+	}
+
+	ret = snd_soc_write(codec, CS42888_FORMAT, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	val = snd_soc_read(codec, CS42888_MODE);
+	/* set master/slave audio interface */
+	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		cs42888->slave_mode = 1;
+		val &= ~CS42888_MODE_SPEED_MASK;
+		val |= CS42888_MODE_SLAVE;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		cs42888->slave_mode = 0;
+		break;
+	default:
+		/* all other modes are unsupported by the hardware */
+		ret = -EINVAL;
+		return ret;
+	}
+
+	ret = snd_soc_write(codec, CS42888_MODE, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+/**
+ * cs42888_hw_params - program the CS42888 with the given hardware parameters.
+ * @substream: the audio stream
+ * @params: the hardware parameters to set
+
+ * @dai: the SOC DAI (ignored)
+ *
+ * This function programs the hardware with the values provided.
+ * Specifically, the sample rate and the data format.
+ *
+ * The .ops functions are used to provide board-specific data, like input
+ * frequencies, to this driver.  This function takes that information,
+ * combines it with the hardware parameters provided, and programs the
+ * hardware accordingly.
+ */
+static int cs42888_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct cs42888_private *cs42888 =  snd_soc_codec_get_drvdata(codec);
+	int ret;
+	unsigned int i;
+	unsigned int rate;
+	unsigned int ratio;
+	u8 val;
+
+	rate = params_rate(params);	/* Sampling rate, in Hz */
+	ratio = cs42888->mclk / rate;	/* MCLK/LRCK ratio */
+	for (i = 0; i < NUM_MCLK_RATIOS; i++) {
+		if (cs42888_mode_ratios[i].ratio == ratio)
+			break;
+	}
+
+	if (i == NUM_MCLK_RATIOS) {
+		/* We did not find a matching ratio */
+		dev_err(codec->dev, "could not find matching ratio\n");
+		return -EINVAL;
+	}
+
+	if (!cs42888->slave_mode) {
+		val = snd_soc_read(codec, CS42888_MODE);
+		val &= ~CS42888_MODE_SPEED_MASK;
+		val |= cs42888_mode_ratios[i].speed_mode;
+		val &= ~CS42888_MODE_DIV_MASK;
+		val |= cs42888_mode_ratios[i].mclk;
+	} else {
+		val = snd_soc_read(codec, CS42888_MODE);
+		val &= ~CS42888_MODE_SPEED_MASK;
+		val |= CS42888_MODE_SLAVE;
+		val &= ~CS42888_MODE_DIV_MASK;
+		val |= cs42888_mode_ratios[i].mclk;
+	}
+	ret = snd_soc_write(codec, CS42888_MODE, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	/* Out of low power state */
+	val = snd_soc_read(codec, CS42888_PWRCTL);
+	val &= ~CS42888_PWRCTL_PDN_MASK;
+	ret = snd_soc_write(codec, CS42888_PWRCTL, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	/* Unmute all the channels */
+	val = snd_soc_read(codec, CS42888_MUTE);
+	val &= ~CS42888_MUTE_ALL;
+	ret = snd_soc_write(codec, CS42888_MUTE, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+
+	ret = cs42888_fill_cache(codec);
+	if (ret < 0) {
+		pr_err("failed to fill register cache\n");
+		return ret;
+	}
+
+	return ret;
+}
+
+/**
+ * cs42888_shutdown - cs42888 enters into low power mode again.
+ * @substream: the audio stream
+ * @dai: the SOC DAI (ignored)
+ *
+ * The .ops functions are used to provide board-specific data, like input
+ * frequencies, to this driver.  This function takes that information,
+ * combines it with the hardware parameters provided, and programs the
+ * hardware accordingly.
+ */
+static void cs42888_shutdown(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_codec *codec = rtd->codec;
+	int ret;
+	u8 val;
+
+	/* Mute all the channels */
+	val = snd_soc_read(codec, CS42888_MUTE);
+
+	val |= CS42888_MUTE_ALL;
+	ret = snd_soc_write(codec, CS42888_MUTE, val);
+	if (ret < 0)
+		pr_err("i2c write failed\n");
+
+	/* Enter low power state */
+	val = snd_soc_read(codec, CS42888_PWRCTL);
+	val |= CS42888_PWRCTL_PDN_MASK;
+	ret = snd_soc_write(codec, CS42888_PWRCTL, val);
+	if (ret < 0)
+		pr_err("i2c write failed\n");
+}
+
+static struct snd_soc_dai_ops cs42888_dai_ops = {
+	.set_fmt	= cs42888_set_dai_fmt,
+	.set_sysclk	= cs42888_set_dai_sysclk,
+	.hw_params	= cs42888_hw_params,
+	.shutdown	= cs42888_shutdown,
+};
+
+struct snd_soc_dai_driver cs42888_dai = {
+	.name = "CS42888",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 8,
+		.rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_88200 |\
+			SNDRV_PCM_RATE_176400),
+		.formats = CS42888_FORMATS,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 4,
+		.rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_88200 |\
+			SNDRV_PCM_RATE_176400),
+		.formats = CS42888_FORMATS,
+	},
+	.ops = &cs42888_dai_ops,
+	.symmetric_rates = 1,
+};
+
+/**
+ * cs42888_probe - ASoC probe function
+ * @pdev: platform device
+ *
+ * This function is called when ASoC has all the pieces it needs to
+ * instantiate a sound driver.
+ */
+static int cs42888_probe(struct snd_soc_codec *codec)
+{
+	int ret, i;
+	int val;
+
+	struct cs42888_private *cs42888 = snd_soc_codec_get_drvdata(codec);
+	/* setup i2c data ops */
+	ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(cs42888->supplies); i++)
+		cs42888->supplies[i].supply = cs42888_supply_names[i];
+
+	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(cs42888->supplies),
+				 cs42888->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(ARRAY_SIZE(cs42888->supplies),
+				    cs42888->supplies);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+		goto err;
+	}
+	msleep(1);
+
+	/* Verify that we have a CS42888 */
+	val = snd_soc_read(codec, CS42888_CHIPID);
+	if (val < 0) {
+		pr_err("Device with ID register %x is not a CS42888", val);
+		return -ENODEV;
+	}
+	/* The top four bits of the chip ID should be 0000. */
+	if ((val & CS42888_CHIPID_ID_MASK) != 0x00) {
+		dev_err(codec->dev, "device is not a CS42888\n");
+		return -ENODEV;
+	}
+
+	dev_info(codec->dev, "hardware revision %X\n", val & 0xF);
+
+	/* The I2C interface is set up, so pre-fill our register cache */
+	ret = cs42888_fill_cache(codec);
+	if (ret < 0) {
+		dev_err(codec->dev, "failed to fill register cache\n");
+		goto err;
+	}
+
+	/* Enter low power state */
+	val = snd_soc_read(codec, CS42888_PWRCTL);
+	val |= CS42888_PWRCTL_PDN_MASK;
+	ret = snd_soc_write(codec, CS42888_PWRCTL, val);
+	if (ret < 0) {
+		dev_err(codec->dev, "i2c write failed\n");
+		return ret;
+	}
+
+	/* Disable auto-mute */
+	val = snd_soc_read(codec, CS42888_TRANS);
+	val &= ~CS42888_TRANS_AMUTE_MASK;
+	ret = snd_soc_write(codec, CS42888_TRANS, val);
+	if (ret < 0) {
+		pr_err("i2c write failed\n");
+		return ret;
+	}
+	/* Add the non-DAPM controls */
+	snd_soc_add_controls(codec, cs42888_snd_controls,
+				ARRAY_SIZE(cs42888_snd_controls));
+
+	/* Add DAPM controls */
+	cs42888_add_widgets(codec);
+
+	return 0;
+err:
+	regulator_bulk_disable(ARRAY_SIZE(cs42888->supplies),
+						cs42888->supplies);
+	regulator_bulk_free(ARRAY_SIZE(cs42888->supplies),
+				cs42888->supplies);
+	return ret;
+}
+
+/**
+ * cs42888_remove - ASoC remove function
+ * @pdev: platform device
+ *
+ * This function is the counterpart to cs42888_probe().
+ */
+static int cs42888_remove(struct snd_soc_codec *codec)
+{
+	struct cs42888_private *cs42888 = snd_soc_codec_get_drvdata(codec);
+
+	regulator_bulk_disable(ARRAY_SIZE(cs42888->supplies),
+						cs42888->supplies);
+	regulator_bulk_free(ARRAY_SIZE(cs42888->supplies),
+				cs42888->supplies);
+
+	return 0;
+};
+
+/*
+ * ASoC codec device structure
+ *
+ * Assign this variable to the codec_dev field of the machine driver's
+ * snd_soc_device structure.
+ */
+struct snd_soc_codec_driver cs42888_driver = {
+	.probe =	cs42888_probe,
+	.remove =	cs42888_remove,
+	.reg_cache_size = CS42888_NUMREGS + 1,
+	.reg_word_size = sizeof(u8),
+	.reg_cache_step = 1,
+};
+
+/**
+ * cs42888_i2c_probe - initialize the I2C interface of the CS42888
+ * @i2c_client: the I2C client object
+ * @id: the I2C device ID (ignored)
+ *
+ * This function is called whenever the I2C subsystem finds a device that
+ * matches the device ID given via a prior call to i2c_add_driver().
+ */
+static int cs42888_i2c_probe(struct i2c_client *i2c_client,
+	const struct i2c_device_id *id)
+{
+	struct cs42888_private *cs42888;
+	int ret;
+
+	/* Allocate enough space for the snd_soc_codec structure
+	   and our private data together. */
+	cs42888 = kzalloc(sizeof(struct cs42888_private), GFP_KERNEL);
+	if (!cs42888) {
+		dev_err(&i2c_client->dev, "could not allocate codec\n");
+		return -ENOMEM;
+	}
+
+	i2c_set_clientdata(i2c_client, cs42888);
+
+	ret = snd_soc_register_codec(&i2c_client->dev,
+		&cs42888_driver, &cs42888_dai, 1);
+	if (ret) {
+		dev_err(&i2c_client->dev, "Failed to register codec:%d\n", ret);
+		kfree(cs42888);
+	return ret;
+	}
+	return 0;
+}
+
+/**
+ * cs42888_i2c_remove - remove an I2C device
+ * @i2c_client: the I2C client object
+ *
+ * This function is the counterpart to cs42888_i2c_probe().
+ */
+static int cs42888_i2c_remove(struct i2c_client *i2c_client)
+{
+	struct cs42888_private *cs42888 = i2c_get_clientdata(i2c_client);
+
+	snd_soc_unregister_codec(&i2c_client->dev);
+	kfree(cs42888);
+
+	return 0;
+}
+
+/*
+ * cs42888_i2c_id - I2C device IDs supported by this driver
+ */
+static struct i2c_device_id cs42888_i2c_id[] = {
+	{"cs42888", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cs42888_i2c_id);
+
+#ifdef CONFIG_PM
+/* This suspend/resume implementation can handle both - a simple standby
+ * where the codec remains powered, and a full suspend, where the voltage
+ * domain the codec is connected to is teared down and/or any other hardware
+ * reset condition is asserted.
+ *
+ * The codec's own power saving features are enabled in the suspend callback,
+ * and all registers are written back to the hardware when resuming.
+ */
+
+static int cs42888_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+	struct cs42888_private *cs42888 = i2c_get_clientdata(client);
+	struct snd_soc_codec *codec = &cs42888->codec;
+	int reg = snd_soc_read(codec, CS42888_PWRCTL) | CS42888_PWRCTL_PDN_MASK;
+
+	return snd_soc_write(codec, CS42888_PWRCTL, reg);
+}
+
+static int cs42888_i2c_resume(struct i2c_client *client)
+{
+	struct cs42888_private *cs42888 = i2c_get_clientdata(client);
+	struct snd_soc_codec *codec = &cs42888->codec;
+	int reg;
+
+	/* In case the device was put to hard reset during sleep, we need to
+	 * wait 500ns here before any I2C communication. */
+	ndelay(500);
+
+	/* first restore the entire register cache ... */
+	for (reg = CS42888_FIRSTREG; reg <= CS42888_LASTREG; reg++) {
+		u8 val = snd_soc_read(codec, reg);
+
+		if (i2c_smbus_write_byte_data(client, reg, val)) {
+			dev_err(codec->dev, "i2c write failed\n");
+			return -EIO;
+		}
+	}
+
+	/* ... then disable the power-down bits */
+	reg = snd_soc_read(codec, CS42888_PWRCTL);
+	reg &= ~CS42888_PWRCTL_PDN_MASK;
+
+	return snd_soc_write(codec, CS42888_PWRCTL, reg);
+}
+#else
+#define cs42888_i2c_suspend	NULL
+#define cs42888_i2c_resume	NULL
+#endif /* CONFIG_PM */
+
+/*
+ * cs42888_i2c_driver - I2C device identification
+ *
+ * This structure tells the I2C subsystem how to identify and support a
+ * given I2C device type.
+ */
+static struct i2c_driver cs42888_i2c_driver = {
+	.driver = {
+		.name = "cs42888",
+		.owner = THIS_MODULE,
+	},
+	.probe = cs42888_i2c_probe,
+	.remove = cs42888_i2c_remove,
+	.suspend = cs42888_i2c_suspend,
+	.resume = cs42888_i2c_resume,
+	.id_table = cs42888_i2c_id,
+};
+
+static int __init cs42888_init(void)
+{
+	pr_info("Cirrus Logic CS42888 ALSA SoC Codec Driver\n");
+	return i2c_add_driver(&cs42888_i2c_driver);
+}
+module_init(cs42888_init);
+
+static void __exit cs42888_exit(void)
+{
+	i2c_del_driver(&cs42888_i2c_driver);
+}
+module_exit(cs42888_exit);
+
+MODULE_AUTHOR("Xu Lionel <R63889@freescale.com>");
+MODULE_DESCRIPTION("Cirrus Logic CS42888 ALSA SoC Codec Driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/cs42888.h b/sound/soc/codecs/cs42888.h
new file mode 100644
index 000000000000..a650c9da5338
--- /dev/null
+++ b/sound/soc/codecs/cs42888.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2010-2011 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
+ */
+
+#ifndef _CS42888_H
+#define _CS42888_H
+
+/*
+ * The ASoC codec DAI structure for the CS42888.  Assign this structure to
+ * the .codec_dai field of your machine driver's snd_soc_dai_link structure.
+ */
+extern struct snd_soc_dai_driver cs42888_dai;
+
+/*
+ * The ASoC codec device structure for the CS42888.  Assign this structure
+ * to the .codec_dev field of your machine driver's snd_soc_device
+ * structure.
+ */
+extern struct snd_soc_codec_device soc_codec_device_cs42888;
+
+extern void gpio_cs42888_pdwn(int pdwn);
+#endif
diff --git a/sound/soc/imx/Kconfig b/sound/soc/imx/Kconfig
index 9a8a69305120..ac5a7fc85f90 100644
--- a/sound/soc/imx/Kconfig
+++ b/sound/soc/imx/Kconfig
@@ -14,6 +14,9 @@ if SND_IMX_SOC
 config SND_MXC_SOC_SSI
 	tristate
 
+config SND_MXC_SOC_ESAI
+	tristate
+
 config SND_MXC_SOC_FIQ
 	tristate
 
@@ -52,6 +55,15 @@ config SND_SOC_IMX_SGTL5000
 	  Say Y if you want to add support for SoC audio on an i.MX board with
 	  a sgtl5000 codec.
 
+config SND_SOC_IMX_CS42888
+	tristate "SoC Audio support for i.MX boards with cs42888"
+	depends on MACH_MX6Q_SABREAUTO
+	select SND_SOC_CS42888
+	select SND_MXC_SOC_MX2
+	help
+	  Say Y if you want to add support for SoC audio on an i.MX board with
+	  a cs42888 codec
+
 config SND_SOC_EUKREA_TLV320
 	tristate "Eukrea TLV320"
 	depends on MACH_EUKREA_MBIMX27_BASEBOARD \
diff --git a/sound/soc/imx/Makefile b/sound/soc/imx/Makefile
index aa0097dcc9d1..566acffdbf92 100644
--- a/sound/soc/imx/Makefile
+++ b/sound/soc/imx/Makefile
@@ -1,5 +1,5 @@
 # i.MX Platform Support
-snd-soc-imx-objs := imx-ssi.o
+snd-soc-imx-objs := imx-esai.o
 snd-soc-imx-fiq-objs := imx-pcm-fiq.o
 snd-soc-imx-mx2-objs := imx-pcm-dma-mx2.o
 snd-soc-imx-spdif-dai-objs := imx-spdif-dai.o
@@ -14,10 +14,12 @@ snd-soc-eukrea-tlv320-objs := eukrea-tlv320.o
 snd-soc-phycore-ac97-objs := phycore-ac97.o
 snd-soc-wm1133-ev1-objs := wm1133-ev1.o
 snd-soc-imx-sgtl5000-objs := imx-sgtl5000.o
+snd-soc-imx-cs42888-objs := imx-cs42888.o
 snd-soc-imx-spdif-objs := imx-spdif.o
 
 obj-$(CONFIG_SND_SOC_EUKREA_TLV320) += snd-soc-eukrea-tlv320.o
 obj-$(CONFIG_SND_SOC_PHYCORE_AC97) += snd-soc-phycore-ac97.o
 obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
 obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
+obj-$(CONFIG_SND_SOC_IMX_CS42888) += snd-soc-imx-cs42888.o
 obj-$(CONFIG_SND_SOC_IMX_SPDIF) += snd-soc-imx-spdif.o
diff --git a/sound/soc/imx/imx-cs42888.c b/sound/soc/imx/imx-cs42888.c
new file mode 100644
index 000000000000..fe6ae4e053b6
--- /dev/null
+++ b/sound/soc/imx/imx-cs42888.c
@@ -0,0 +1,389 @@
+/*
+ * Copyright (C) 2010-2011 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
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/fsl_devices.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/soc-dai.h>
+
+#include <mach/hardware.h>
+#include <mach/clock.h>
+
+#include "imx-esai.h"
+#include "../codecs/cs42888.h"
+
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+#include <linux/mxc_asrc.h>
+#endif
+
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+static unsigned int asrc_rates[] = {
+	0,
+	8000,
+	11025,
+	16000,
+	22050,
+	32000,
+	44100,
+	48000,
+	64000,
+	88200,
+	96000,
+	176400,
+	192000,
+};
+
+struct asrc_esai {
+	unsigned int cpu_dai_rates;
+	unsigned int codec_dai_rates;
+	enum asrc_pair_index asrc_index;
+	unsigned int output_sample_rate;
+};
+
+static struct asrc_esai asrc_esai_data;
+
+#endif
+
+struct imx_3stack_pcm_state {
+	int lr_clk_active;
+};
+
+static struct imx_3stack_pcm_state clk_state;
+unsigned int mclk_freq;
+
+static int imx_3stack_startup(struct snd_pcm_substream *substream)
+{
+	clk_state.lr_clk_active++;
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+	if (asrc_esai_data.output_sample_rate >= 32000) {
+		struct snd_soc_pcm_runtime *rtd = substream->private_data;
+		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *codec_dai = rtd->codec_dai;
+		asrc_esai_data.cpu_dai_rates = cpu_dai->playback.rates;
+		asrc_esai_data.codec_dai_rates = codec_dai->playback.rates;
+		cpu_dai->playback.rates =
+		    SNDRV_PCM_RATE_8000_192000 | SNDRV_PCM_RATE_KNOT;
+		codec_dai->playback.rates =
+		    SNDRV_PCM_RATE_8000_192000 | SNDRV_PCM_RATE_KNOT;
+	}
+#endif
+
+	return 0;
+}
+
+static void imx_3stack_shutdown(struct snd_pcm_substream *substream)
+{
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+	if (asrc_esai_data.output_sample_rate >= 32000) {
+		struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+		struct snd_soc_dai *codec_dai = rtd->codec_dai;
+		codec_dai->playback.rates = asrc_esai_data.codec_dai_rates;
+		cpu_dai->playback.rates = asrc_esai_data.cpu_dai_rates;
+		asrc_release_pair(asrc_esai_data.asrc_index);
+	}
+#endif
+
+	clk_state.lr_clk_active--;
+}
+
+static int imx_3stack_surround_hw_params(struct snd_pcm_substream *substream,
+					 struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	unsigned int rate = params_rate(params);
+	u32 dai_format;
+	unsigned int lrclk_ratio = 0;
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+	unsigned int channel = params_channels(params);
+#endif
+	if (clk_state.lr_clk_active > 1)
+		return 0;
+
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+	if (asrc_esai_data.output_sample_rate >= 32000) {
+		unsigned int asrc_input_rate = rate;
+		struct mxc_runtime_data *pcm_data =
+		    substream->runtime->private_data;
+		struct asrc_config config;
+		int retVal = 0;;
+
+		retVal = asrc_req_pair(channel, &asrc_esai_data.asrc_index);
+		if (retVal < 0) {
+			pr_err("Fail to request asrc pair\n");
+			return -1;
+		}
+
+		config.pair = asrc_esai_data.asrc_index;
+		config.channel_num = channel;
+		config.input_sample_rate = asrc_input_rate;
+		config.output_sample_rate = asrc_esai_data.output_sample_rate;
+		config.inclk = INCLK_NONE;
+		config.word_width = 32;
+		config.outclk = OUTCLK_ESAI_TX;
+		retVal = asrc_config_pair(&config);
+		if (retVal < 0) {
+			pr_err("Fail to config asrc\n");
+			asrc_release_pair(asrc_esai_data.asrc_index);
+			return retVal;
+		}
+		rate = asrc_esai_data.output_sample_rate;
+		pcm_data->asrc_index = asrc_esai_data.asrc_index;
+		pcm_data->asrc_enable = 1;
+	}
+#endif
+
+	switch (rate) {
+	case 32000:
+		lrclk_ratio = 5;
+		break;
+	case 48000:
+		lrclk_ratio = 5;
+		break;
+	case 64000:
+		lrclk_ratio = 2;
+		break;
+	case 96000:
+		lrclk_ratio = 2;
+		break;
+	case 128000:
+		lrclk_ratio = 2;
+		break;
+	case 44100:
+		lrclk_ratio = 5;
+		break;
+	case 88200:
+		lrclk_ratio = 2;
+		break;
+	case 176400:
+		lrclk_ratio = 0;
+		break;
+	case 192000:
+		lrclk_ratio = 0;
+		break;
+	default:
+		pr_info("Rate not support.\n");
+		return -EINVAL;;
+	}
+
+	dai_format = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF |
+	    SND_SOC_DAIFMT_CBS_CFS;
+
+
+	/* set cpu DAI configuration */
+	snd_soc_dai_set_fmt(cpu_dai, dai_format);
+	/* set i.MX active slot mask */
+	snd_soc_dai_set_tdm_slot(cpu_dai, 0x3, 0x3, 2, 32);
+	/* set the ESAI system clock as output */
+	snd_soc_dai_set_sysclk(cpu_dai, ESAI_CLK_EXTAL_DIV,
+		mclk_freq, SND_SOC_CLOCK_OUT);
+	/* set the ratio */
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_PSR, 1);
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_PM, 2);
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_TX_DIV_FP, lrclk_ratio);
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_PSR, 1);
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_PM, 0);
+	snd_soc_dai_set_clkdiv(cpu_dai, ESAI_RX_DIV_FP, lrclk_ratio);
+
+	/* set codec DAI configuration */
+	snd_soc_dai_set_fmt(codec_dai, dai_format);
+	/* set codec Master clock */
+	snd_soc_dai_set_sysclk(codec_dai, 0, mclk_freq, SND_SOC_CLOCK_IN);
+
+	return 0;
+}
+
+static struct snd_soc_ops imx_3stack_surround_ops = {
+	.startup = imx_3stack_startup,
+	.shutdown = imx_3stack_shutdown,
+	.hw_params = imx_3stack_surround_hw_params,
+};
+
+static const struct snd_soc_dapm_widget imx_3stack_dapm_widgets[] = {
+	SND_SOC_DAPM_LINE("Line Out Jack", NULL),
+	SND_SOC_DAPM_LINE("Line In Jack", NULL),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	/* Line out jack */
+	{"Line Out Jack", NULL, "AOUT1L"},
+	{"Line Out Jack", NULL, "AOUT1R"},
+	{"Line Out Jack", NULL, "AOUT2L"},
+	{"Line Out Jack", NULL, "AOUT2R"},
+	{"Line Out Jack", NULL, "AOUT3L"},
+	{"Line Out Jack", NULL, "AOUT3R"},
+	{"Line Out Jack", NULL, "AOUT4L"},
+	{"Line Out Jack", NULL, "AOUT4R"},
+	{"AIN1L", NULL, "Line In Jack"},
+	{"AIN1R", NULL, "Line In Jack"},
+	{"AIN2L", NULL, "Line In Jack"},
+	{"AIN2R", NULL, "Line In Jack"},
+};
+
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+static int asrc_func;
+
+static const char *asrc_function[] = {
+	"disable", "32KHz", "44.1KHz",
+	"48KHz", "64KHz", "88.2KHz", "96KHz", "176.4KHz", "192KHz"
+};
+
+static const struct soc_enum asrc_enum[] = {
+	SOC_ENUM_SINGLE_EXT(9, asrc_function),
+};
+
+static int asrc_get_rate(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.enumerated.item[0] = asrc_func;
+	return 0;
+}
+
+static int asrc_set_rate(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	if (asrc_func == ucontrol->value.enumerated.item[0])
+		return 0;
+
+	asrc_func = ucontrol->value.enumerated.item[0];
+	asrc_esai_data.output_sample_rate = asrc_rates[asrc_func + 4];
+
+	return 1;
+}
+
+static const struct snd_kcontrol_new asrc_controls[] = {
+	SOC_ENUM_EXT("ASRC", asrc_enum[0], asrc_get_rate,
+		     asrc_set_rate),
+};
+
+#endif
+
+static int imx_3stack_cs42888_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+#if defined(CONFIG_MXC_ASRC) || defined(CONFIG_MXC_ASRC_MODULE)
+	int i;
+	int ret;
+	for (i = 0; i < ARRAY_SIZE(asrc_controls); i++) {
+		ret = snd_ctl_add(codec->card,
+				  snd_soc_cnew(&asrc_controls[i], codec, NULL));
+		if (ret < 0)
+			return ret;
+	}
+	asrc_esai_data.output_sample_rate = asrc_rates[asrc_func + 4];
+#endif
+
+	snd_soc_dapm_new_controls(&codec->dapm, imx_3stack_dapm_widgets,
+				  ARRAY_SIZE(imx_3stack_dapm_widgets));
+
+	snd_soc_dapm_add_routes(&codec->dapm, audio_map, ARRAY_SIZE(audio_map));
+
+	snd_soc_dapm_sync(&codec->dapm);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link imx_3stack_dai[] = {
+	{
+	.name = "HiFi",
+	.stream_name = "HiFi",
+	.codec_dai_name = "CS42888",
+	.codec_name = "cs42888.0-0048",
+	.cpu_dai_name = "imx-esai.0",
+	.platform_name = "imx-pcm-audio.0",
+	.init = imx_3stack_cs42888_init,
+	.ops = &imx_3stack_surround_ops,
+	},
+};
+
+static struct snd_soc_card snd_soc_card_imx_3stack = {
+	.name = "imx-3stack",
+	.dai_link = imx_3stack_dai,
+	.num_links = ARRAY_SIZE(imx_3stack_dai),
+};
+
+/*
+ * This function will register the snd_soc_pcm_link drivers.
+ */
+static int __devinit imx_3stack_cs42888_probe(struct platform_device *pdev)
+{
+	struct mxc_audio_platform_data *plat_data = pdev->dev.platform_data;
+	mclk_freq = plat_data->sysclk;
+	return 0;
+}
+
+static int __devexit imx_3stack_cs42888_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static struct platform_driver imx_3stack_cs42888_driver = {
+	.probe = imx_3stack_cs42888_probe,
+	.remove = __devexit_p(imx_3stack_cs42888_remove),
+	.driver = {
+		   .name = "imx-cs42888",
+		   .owner = THIS_MODULE,
+		   },
+};
+
+static struct platform_device *imx_3stack_snd_device;
+
+static int __init imx_3stack_asoc_init(void)
+{
+	int ret;
+	pr_info("imx_3stack asoc driver\n");
+	ret = platform_driver_register(&imx_3stack_cs42888_driver);
+	if (ret < 0)
+		goto exit;
+
+	imx_3stack_snd_device = platform_device_alloc("soc-audio", 1);
+	if (!imx_3stack_snd_device)
+		goto err_device_alloc;
+	platform_set_drvdata(imx_3stack_snd_device, &snd_soc_card_imx_3stack);
+	ret = platform_device_add(imx_3stack_snd_device);
+	if (0 == ret)
+		goto exit;
+
+	platform_device_unregister(imx_3stack_snd_device);
+err_device_alloc:
+	platform_driver_unregister(&imx_3stack_cs42888_driver);
+exit:
+	return ret;
+}
+
+static void __exit imx_3stack_asoc_exit(void)
+{
+	platform_driver_unregister(&imx_3stack_cs42888_driver);
+	platform_device_unregister(imx_3stack_snd_device);
+}
+
+module_init(imx_3stack_asoc_init);
+module_exit(imx_3stack_asoc_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("ALSA SoC cs42888 Machine Layer Driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/imx/imx-esai.c b/sound/soc/imx/imx-esai.c
new file mode 100644
index 000000000000..03bf0744cbb0
--- /dev/null
+++ b/sound/soc/imx/imx-esai.c
@@ -0,0 +1,794 @@
+/*
+ * Copyright 2008-2011 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       imx-esai.c
+  * @brief      this file implements the esai interface
+  *             in according to ASoC architeture
+  */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <mach/dma.h>
+#include <mach/clock.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <mach/esai.h>
+
+#include "imx-esai.h"
+
+static struct imx_esai *local_esai;
+
+static int imx_esai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
+				   int clk_id, unsigned int freq, int dir)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 ecr, tccr, rccr;
+
+	ecr = readl(esai->base + ESAI_ECR);
+	tccr = readl(esai->base + ESAI_TCCR);
+	rccr = readl(esai->base + ESAI_RCCR);
+
+	if (dir == SND_SOC_CLOCK_IN) {
+		tccr &= ~(ESAI_TCCR_THCKD | ESAI_TCCR_TCKD | ESAI_TCCR_TFSD);
+		rccr &= ~(ESAI_RCCR_RHCKD | ESAI_RCCR_RCKD | ESAI_RCCR_RFSD);
+	} else {
+		tccr |= ESAI_TCCR_THCKD | ESAI_TCCR_TCKD | ESAI_TCCR_TFSD;
+		rccr |= ESAI_RCCR_RHCKD | ESAI_RCCR_RCKD | ESAI_RCCR_RFSD;
+
+		if (clk_id == ESAI_CLK_FSYS) {
+			ecr &= ~(ESAI_ECR_ETI | ESAI_ECR_ETO);
+			ecr &= ~(ESAI_ECR_ERI | ESAI_ECR_ERO);
+		} else if (clk_id == ESAI_CLK_EXTAL) {
+			ecr |= ESAI_ECR_ETI;
+			ecr |= ESAI_ECR_ETO;
+			ecr |= ESAI_ECR_ERI;
+			ecr |= ESAI_ECR_ERO;
+		} else if (clk_id == ESAI_CLK_EXTAL_DIV) {
+			ecr |= ESAI_ECR_ETI;
+			ecr &= ~ESAI_ECR_ETO;
+			ecr |= ESAI_ECR_ERI;
+			ecr |= ESAI_ECR_ERO;
+		}
+	}
+
+	writel(ecr, esai->base + ESAI_ECR);
+	writel(tccr, esai->base + ESAI_TCCR);
+	writel(rccr, esai->base + ESAI_RCCR);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+static int imx_esai_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
+				   int div_id, int div)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tccr, rccr;
+
+	tccr = readl(esai->base + ESAI_TCCR);
+	rccr = readl(esai->base + ESAI_RCCR);
+
+	switch (div_id) {
+	case ESAI_TX_DIV_PSR:
+		tccr &= ESAI_TCCR_TPSR_MASK;
+		if (div)
+			tccr |= ESAI_TCCR_TPSR_BYPASS;
+		else
+			tccr &= ~ESAI_TCCR_TPSR_DIV8;
+		break;
+	case ESAI_TX_DIV_PM:
+		tccr &= ESAI_TCCR_TPM_MASK;
+		tccr |= ESAI_TCCR_TPM(div);
+		break;
+	case ESAI_TX_DIV_FP:
+		tccr &= ESAI_TCCR_TFP_MASK;
+		tccr |= ESAI_TCCR_TFP(div);
+		break;
+	case ESAI_RX_DIV_PSR:
+		rccr &= ESAI_RCCR_RPSR_MASK;
+		if (div)
+			rccr |= ESAI_RCCR_RPSR_BYPASS;
+		else
+			rccr &= ~ESAI_RCCR_RPSR_DIV8;
+		break;
+	case ESAI_RX_DIV_PM:
+		rccr &= ESAI_RCCR_RPM_MASK;
+		rccr |= ESAI_RCCR_RPM(div);
+		break;
+	case ESAI_RX_DIV_FP:
+		rccr &= ESAI_RCCR_RFP_MASK;
+		rccr |= ESAI_RCCR_RFP(div);
+		break;
+		return -EINVAL;
+	}
+	writel(tccr, esai->base + ESAI_TCCR);
+	writel(rccr, esai->base + ESAI_RCCR);
+	return 0;
+}
+
+/*
+ * ESAI Network Mode or TDM slots configuration.
+ */
+static int imx_esai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
+	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tccr, rccr;
+
+	tccr = readl(esai->base + ESAI_TCCR);
+
+	tccr &= ESAI_TCCR_TDC_MASK;
+	tccr |= ESAI_TCCR_TDC(slots - 1);
+
+	writel(tccr, esai->base + ESAI_TCCR);
+	writel((tx_mask & 0xffff), esai->base + ESAI_TSMA);
+	writel(((tx_mask >> 16) & 0xffff), esai->base + ESAI_TSMB);
+
+	rccr = readl(esai->base + ESAI_RCCR);
+
+	rccr &= ESAI_RCCR_RDC_MASK;
+	rccr |= ESAI_RCCR_RDC(slots - 1);
+
+	writel(rccr, esai->base + ESAI_RCCR);
+	writel((rx_mask & 0xffff), esai->base + ESAI_RSMA);
+	writel(((rx_mask >> 16) & 0xffff), esai->base + ESAI_RSMB);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+/*
+ * ESAI DAI format configuration.
+ */
+static int imx_esai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tcr, tccr, rcr, rccr, saicr;
+
+	tcr = readl(esai->base + ESAI_TCR);
+	tccr = readl(esai->base + ESAI_TCCR);
+	rcr = readl(esai->base + ESAI_RCR);
+	rccr = readl(esai->base + ESAI_RCCR);
+	saicr = readl(esai->base + ESAI_SAICR);
+
+	/* DAI mode */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		/* data on rising edge of bclk, frame low 1clk before data */
+		tcr &= ~ESAI_TCR_TFSL;
+		tcr |= ESAI_TCR_TFSR;
+		rcr &= ~ESAI_RCR_RFSL;
+		rcr |= ESAI_RCR_RFSR;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		/* data on rising edge of bclk, frame high with data */
+		tcr &= ~(ESAI_TCR_TFSL | ESAI_TCR_TFSR);
+		rcr &= ~(ESAI_RCR_RFSL | ESAI_RCR_RFSR);
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+		/* data on rising edge of bclk, frame high with data */
+		tcr |= ESAI_TCR_TFSL;
+		rcr |= ESAI_RCR_RFSL;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		/* data on rising edge of bclk, frame high 1clk before data */
+		tcr |= ESAI_TCR_TFSL;
+		rcr |= ESAI_RCR_RFSL;
+		break;
+	}
+
+	/* DAI clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_IB_IF:
+		tccr |= ESAI_TCCR_TFSP;
+		tccr &= ~(ESAI_TCCR_TCKP | ESAI_TCCR_THCKP);
+		rccr &= ~(ESAI_RCCR_RCKP | ESAI_RCCR_RHCKP);
+		rccr |= ESAI_RCCR_RFSP;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		tccr &= ~(ESAI_TCCR_TCKP | ESAI_TCCR_THCKP | ESAI_TCCR_TFSP);
+		rccr &= ~(ESAI_RCCR_RCKP | ESAI_RCCR_RHCKP | ESAI_RCCR_RFSP);
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		tccr |= ESAI_TCCR_TCKP | ESAI_TCCR_THCKP | ESAI_TCCR_TFSP;
+		rccr |= ESAI_RCCR_RCKP | ESAI_RCCR_RHCKP | ESAI_RCCR_RFSP;
+		break;
+	case SND_SOC_DAIFMT_NB_NF:
+		tccr &= ~ESAI_TCCR_TFSP;
+		tccr |= ESAI_TCCR_TCKP | ESAI_TCCR_THCKP;
+		rccr &= ~ESAI_RCCR_RFSP;
+		rccr |= ESAI_RCCR_RCKP | ESAI_RCCR_RHCKP;
+		break;
+	}
+
+	/* DAI clock master masks */
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		tccr &= ~(ESAI_TCCR_TFSD | ESAI_TCCR_TCKD);
+		rccr &= ~(ESAI_RCCR_RFSD | ESAI_RCCR_RCKD);
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+		tccr &= ~ESAI_TCCR_TFSD;
+		tccr |= ESAI_TCCR_TCKD;
+		rccr &= ~ESAI_RCCR_RFSD;
+		rccr |= ESAI_RCCR_RCKD;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		tccr &= ~ESAI_TCCR_TCKD;
+		tccr |= ESAI_TCCR_TFSD;
+		rccr &= ~ESAI_RCCR_RCKD;
+		rccr |= ESAI_RCCR_RFSD;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		tccr |= (ESAI_TCCR_TFSD | ESAI_TCCR_TCKD);
+		rccr |= (ESAI_RCCR_RFSD | ESAI_RCCR_RCKD);
+	}
+
+	/* sync */
+	if (esai->flags == IMX_ESAI_SYN)
+		saicr |= ESAI_SAICR_SYNC;
+	else
+		saicr &= ~ESAI_SAICR_SYNC;
+
+	tcr &= ESAI_TCR_TMOD_MASK;
+	rcr &= ESAI_RCR_RMOD_MASK;
+	if (esai->flags == IMX_ESAI_NET) {
+		tcr |= ESAI_TCR_TMOD_NETWORK;
+		rcr |= ESAI_RCR_RMOD_NETWORK;
+	} else {
+		tcr |= ESAI_TCR_TMOD_NORMAL;
+		rcr |= ESAI_RCR_RMOD_NORMAL;
+	}
+
+	writel(tcr, esai->base + ESAI_TCR);
+	writel(tccr, esai->base + ESAI_TCCR);
+	writel(rcr, esai->base + ESAI_RCR);
+	writel(rccr, esai->base + ESAI_RCCR);
+
+	writel(saicr, esai->base + ESAI_SAICR);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+static int imx_esai_startup(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *cpu_dai)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+
+	writel(ESAI_ECR_ERST, esai->base + ESAI_ECR);
+	writel(ESAI_ECR_ESAIEN, esai->base + ESAI_ECR);
+
+	writel(ESAI_GPIO_ESAI, esai->base + ESAI_PRRC);
+	writel(ESAI_GPIO_ESAI, esai->base + ESAI_PCRC);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		writel(ESAI_TCR_TPR, esai->base + ESAI_TCR);
+	else
+		writel(ESAI_RCR_RPR, esai->base + ESAI_RCR);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+/*
+ * This function is called to initialize the TX port before enable
+ * the tx port.
+ */
+static int imx_esai_hw_tx_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *params,
+				 struct snd_soc_dai *cpu_dai)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tcr, tfcr;
+	unsigned int channels;
+	struct imx_pcm_dma_params *dma_data;
+	/* Tx/Rx config */
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		dma_data = &esai->dma_params_tx;
+	else
+		dma_data = &esai->dma_params_rx;
+
+	snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
+
+	tcr = readl(esai->base + ESAI_TCR);
+	tfcr = readl(esai->base + ESAI_TFCR);
+
+	tfcr |= ESAI_TFCR_TFR;
+	writel(tfcr, esai->base + ESAI_TFCR);
+	tfcr &= ~ESAI_TFCR_TFR;
+	/* DAI data (word) size */
+	tfcr &= ESAI_TFCR_TWA_MASK;
+	tcr &= ESAI_TCR_TSWS_MASK;
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		tfcr |= ESAI_WORD_LEN_16;
+		tcr |= ESAI_TCR_TSHFD_MSB | ESAI_TCR_TSWS_STL32_WDL16;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		tfcr |= ESAI_WORD_LEN_20;
+		tcr |= ESAI_TCR_TSHFD_MSB | ESAI_TCR_TSWS_STL32_WDL20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		tfcr |= ESAI_WORD_LEN_24;
+		tcr |= ESAI_TCR_TSHFD_MSB | ESAI_TCR_TSWS_STL32_WDL24;
+		break;
+	}
+
+	channels = params_channels(params);
+	tfcr &= ESAI_TFCR_TE_MASK;
+	tfcr |= ESAI_TFCR_TE(channels);
+
+	tfcr |= ESAI_TFCR_TFWM(64);
+
+	/* Left aligned, Zero padding */
+	tcr |= ESAI_TCR_PADC;
+	/* TDR initialized from the FIFO */
+	tfcr |= ESAI_TFCR_TIEN;
+
+	writel(tcr, esai->base + ESAI_TCR);
+	writel(tfcr, esai->base + ESAI_TFCR);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+/*
+ * This function is called to initialize the RX port before enable
+ * the rx port.
+ */
+static int imx_esai_hw_rx_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *params,
+				 struct snd_soc_dai *cpu_dai)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 rcr, rfcr;
+	unsigned int channels;
+
+	rcr = readl(esai->base + ESAI_RCR);
+	rfcr = readl(esai->base + ESAI_RFCR);
+
+	rfcr |= ESAI_RFCR_RFR;
+	writel(rfcr, esai->base + ESAI_RFCR);
+	rfcr &= ~ESAI_RFCR_RFR;
+
+	rfcr &= ESAI_RFCR_RWA_MASK;
+	rcr &= ESAI_RCR_RSWS_MASK;
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		rfcr |= ESAI_WORD_LEN_16;
+		rcr |= ESAI_RCR_RSHFD_MSB | ESAI_RCR_RSWS_STL32_WDL16;
+		break;
+	}
+
+	channels = params_channels(params);
+	rfcr &= ESAI_RFCR_RE_MASK;
+	rfcr |= ESAI_RFCR_RE(channels);
+
+	rfcr |= ESAI_RFCR_RFWM(64);
+
+	writel(rcr, esai->base + ESAI_RCR);
+	writel(rfcr, esai->base + ESAI_RFCR);
+
+	ESAI_DUMP();
+	return 0;
+}
+
+/*
+ * This function is called to initialize the TX or RX port,
+ */
+static int imx_esai_hw_params(struct snd_pcm_substream *substream,
+			      struct snd_pcm_hw_params *params,
+			      struct snd_soc_dai *cpu_dai)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	/* Tx/Rx config */
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		if (readl(esai->base + ESAI_TCR) & ESAI_TCR_TE0)
+			return 0;
+		return imx_esai_hw_tx_params(substream, params, cpu_dai);
+	} else {
+		if (readl(esai->base + ESAI_RCR) & ESAI_RCR_RE1)
+			return 0;
+		return imx_esai_hw_rx_params(substream, params, cpu_dai);
+	}
+}
+
+static int imx_esai_trigger(struct snd_pcm_substream *substream, int cmd,
+			    struct snd_soc_dai *cpu_dai)
+{
+	struct imx_esai *esai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 reg, tfcr = 0, rfcr = 0;
+	u32 temp;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		tfcr = readl(esai->base + ESAI_TFCR);
+		reg = readl(esai->base + ESAI_TCR);
+	} else {
+		rfcr = readl(esai->base + ESAI_RFCR);
+		reg = readl(esai->base + ESAI_RCR);
+	}
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			tfcr |= ESAI_TFCR_TFEN;
+			writel(tfcr, esai->base + ESAI_TFCR);
+			reg &= ~ESAI_TCR_TPR;
+			reg |= ESAI_TCR_TE(substream->runtime->channels);
+			writel(reg, esai->base + ESAI_TCR);
+		} else {
+			temp = readl(esai->base + ESAI_TCR);
+			temp &= ~ESAI_TCR_TPR;
+			writel(temp, esai->base + ESAI_TCR);
+			rfcr |= ESAI_RFCR_RFEN;
+			writel(rfcr, esai->base + ESAI_RFCR);
+			reg &= ~ESAI_RCR_RPR;
+			reg |= ESAI_RCR_RE(substream->runtime->channels);
+			writel(reg, esai->base + ESAI_RCR);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			reg &= ~ESAI_TCR_TE(substream->runtime->channels);
+			writel(reg, esai->base + ESAI_TCR);
+			reg |= ESAI_TCR_TPR;
+			writel(reg, esai->base + ESAI_TCR);
+			tfcr |= ESAI_TFCR_TFR;
+			tfcr &= ~ESAI_TFCR_TFEN;
+			writel(tfcr, esai->base + ESAI_TFCR);
+			tfcr &= ~ESAI_TFCR_TFR;
+			writel(tfcr, esai->base + ESAI_TFCR);
+		} else {
+			reg &= ~ESAI_RCR_RE(substream->runtime->channels);
+			writel(reg, esai->base + ESAI_RCR);
+			reg |= ESAI_RCR_RPR;
+			writel(reg, esai->base + ESAI_RCR);
+			rfcr |= ESAI_RFCR_RFR;
+			rfcr &= ~ESAI_RFCR_RFEN;
+			writel(rfcr, esai->base + ESAI_RFCR);
+			rfcr &= ~ESAI_RFCR_RFR;
+			writel(rfcr, esai->base + ESAI_RFCR);
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ESAI_DUMP();
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int imx_esai_suspend(struct snd_soc_dai *cpu_dai)
+{
+	return 0;
+}
+
+static int imx_esai_resume(struct snd_soc_dai *cpu_dai)
+{
+	return 0;
+}
+
+#else
+#define imx_esai_suspend	NULL
+#define imx_esai_resume	NULL
+#endif
+
+
+#define IMX_ESAI_RATES  SNDRV_PCM_RATE_8000_192000
+
+#define IMX_ESAI_FORMATS \
+	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+	SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_ops imx_esai_dai_ops = {
+	.startup = imx_esai_startup,
+	.trigger = imx_esai_trigger,
+	.hw_params = imx_esai_hw_params,
+	.set_sysclk = imx_esai_set_dai_sysclk,
+	.set_clkdiv = imx_esai_set_dai_clkdiv,
+	.set_fmt = imx_esai_set_dai_fmt,
+	.set_tdm_slot = imx_esai_set_dai_tdm_slot,
+};
+
+static int imx_esai_dai_probe(struct snd_soc_dai *dai)
+{
+	struct imx_esai *esai = dev_get_drvdata(dai->dev);
+	snd_soc_dai_set_drvdata(dai, esai);
+	return 0;
+}
+
+static struct snd_soc_dai_driver imx_esai_dai = {
+	 .name = "imx-esai.0",
+	 .probe = imx_esai_dai_probe,
+	 .suspend = imx_esai_suspend,
+	 .resume = imx_esai_resume,
+	 .playback = {
+		      .channels_min = 1,
+		      .channels_max = 6,
+		      .rates = IMX_ESAI_RATES,
+		      .formats = IMX_ESAI_FORMATS,
+		      },
+	 .capture = {
+		     .channels_min = 1,
+		     .channels_max = 4,
+		     .rates = IMX_ESAI_RATES,
+		     .formats = IMX_ESAI_FORMATS,
+		     },
+	 .ops = &imx_esai_dai_ops,
+};
+
+int snd_imx_pcm_mmap(struct snd_pcm_substream *substream,
+		struct vm_area_struct *vma)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int ret;
+
+	ret = dma_mmap_coherent(NULL, vma, runtime->dma_area,
+			runtime->dma_addr, runtime->dma_bytes);
+
+	pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret,
+			runtime->dma_area,
+			runtime->dma_addr,
+			runtime->dma_bytes);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_imx_pcm_mmap);
+
+static int imx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+	struct snd_dma_buffer *buf = &substream->dma_buffer;
+	size_t size = IMX_ESAI_DMABUF_SIZE;
+
+	buf->dev.type = SNDRV_DMA_TYPE_DEV;
+	buf->dev.dev = pcm->card->dev;
+	buf->private_data = NULL;
+	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
+					   &buf->addr, GFP_KERNEL);
+	if (!buf->area)
+		return -ENOMEM;
+	buf->bytes = size;
+
+	return 0;
+}
+
+static u64 imx_pcm_dmamask = DMA_BIT_MASK(32);
+
+int imx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
+	struct snd_pcm *pcm)
+{
+
+	int ret = 0;
+
+	if (!card->dev->dma_mask)
+		card->dev->dma_mask = &imx_pcm_dmamask;
+	if (!card->dev->coherent_dma_mask)
+		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+	if (dai->driver->playback.channels_min) {
+		ret = imx_pcm_preallocate_dma_buffer(pcm,
+			SNDRV_PCM_STREAM_PLAYBACK);
+		if (ret)
+			goto out;
+	}
+
+	if (dai->driver->capture.channels_min) {
+		ret = imx_pcm_preallocate_dma_buffer(pcm,
+			SNDRV_PCM_STREAM_CAPTURE);
+		if (ret)
+			goto out;
+	}
+
+out:
+	return ret;
+}
+EXPORT_SYMBOL_GPL(imx_pcm_new);
+
+void imx_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_dma_buffer *buf;
+	int stream;
+
+	for (stream = 0; stream < 2; stream++) {
+		substream = pcm->streams[stream].substream;
+		if (!substream)
+			continue;
+
+		buf = &substream->dma_buffer;
+		if (!buf->area)
+			continue;
+
+		dma_free_writecombine(pcm->card->dev, buf->bytes,
+				      buf->area, buf->addr);
+		buf->area = NULL;
+	}
+}
+EXPORT_SYMBOL_GPL(imx_pcm_free);
+
+static int imx_esai_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct imx_esai *esai;
+	struct imx_esai_platform_data *pdata = pdev->dev.platform_data;
+	int ret = 0;
+
+	esai = kzalloc(sizeof(*esai), GFP_KERNEL);
+	if (!esai)
+		return -ENOMEM;
+	local_esai = esai;
+	dev_set_drvdata(&pdev->dev, esai);
+
+	if (pdata)
+		esai->flags = pdata->flags;
+
+	esai->irq = platform_get_irq(pdev, 0);
+
+	esai->clk = clk_get(&pdev->dev, "esai_clk");
+	if (IS_ERR(esai->clk)) {
+		ret = PTR_ERR(esai->clk);
+		dev_err(&pdev->dev, "Cannot get the clock: %d\n",
+			ret);
+		goto failed_clk;
+	}
+	clk_enable(esai->clk);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		ret = -ENODEV;
+		goto failed_get_resource;
+	}
+
+	if (!request_mem_region(res->start, resource_size(res), DRV_NAME)) {
+		dev_err(&pdev->dev, "request_mem_region failed\n");
+		ret = -EBUSY;
+		goto failed_get_resource;
+	}
+
+	esai->base = ioremap(res->start, resource_size(res));
+	if (!esai->base) {
+		dev_err(&pdev->dev, "ioremap failed\n");
+		ret = -ENODEV;
+		goto failed_ioremap;
+	}
+
+	esai->dma_params_rx.dma_addr = res->start + ESAI_ERDR;
+	esai->dma_params_tx.dma_addr = res->start + ESAI_ETDR;
+
+	esai->dma_params_tx.peripheral_type = IMX_DMATYPE_ESAI;
+	esai->dma_params_rx.peripheral_type = IMX_DMATYPE_ESAI;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
+	if (res)
+		esai->dma_params_tx.dma = res->start;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
+	if (res)
+		esai->dma_params_rx.dma = res->start;
+
+	platform_set_drvdata(pdev, esai);
+	ret = snd_soc_register_dai(&pdev->dev, &imx_esai_dai);
+	if (ret) {
+		dev_err(&pdev->dev, "register DAI failed\n");
+		goto failed_register;
+	}
+
+	esai->soc_platform_pdev_fiq = \
+		platform_device_alloc("imx-fiq-pcm-audio", pdev->id);
+	if (!esai->soc_platform_pdev_fiq) {
+		ret = -ENOMEM;
+		goto failed_pdev_fiq_alloc;
+	}
+
+	platform_set_drvdata(esai->soc_platform_pdev_fiq, esai);
+	ret = platform_device_add(esai->soc_platform_pdev_fiq);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add platform device\n");
+		goto failed_pdev_fiq_add;
+	}
+
+	esai->soc_platform_pdev = \
+		platform_device_alloc("imx-pcm-audio", pdev->id);
+	if (!esai->soc_platform_pdev) {
+		ret = -ENOMEM;
+		goto failed_pdev_alloc;
+	}
+
+	platform_set_drvdata(esai->soc_platform_pdev, esai);
+	ret = platform_device_add(esai->soc_platform_pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add platform device\n");
+		goto failed_pdev_add;
+	}
+
+	return 0;
+
+failed_pdev_add:
+	platform_device_put(esai->soc_platform_pdev);
+failed_pdev_alloc:
+	platform_device_del(esai->soc_platform_pdev_fiq);
+failed_pdev_fiq_add:
+	platform_device_put(esai->soc_platform_pdev_fiq);
+failed_pdev_fiq_alloc:
+	snd_soc_unregister_dai(&pdev->dev);
+failed_register:
+	iounmap(esai->base);
+failed_ioremap:
+	release_mem_region(res->start, resource_size(res));
+failed_get_resource:
+	clk_disable(esai->clk);
+	clk_put(esai->clk);
+failed_clk:
+	kfree(esai);
+
+	return ret;
+}
+static int __devexit imx_esai_remove(struct platform_device *pdev)
+{
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	struct imx_esai *esai = platform_get_drvdata(pdev);
+
+	platform_device_unregister(esai->soc_platform_pdev);
+	platform_device_unregister(esai->soc_platform_pdev_fiq);
+
+	snd_soc_unregister_dai(&pdev->dev);
+
+	iounmap(esai->base);
+	release_mem_region(res->start, resource_size(res));
+	clk_disable(esai->clk);
+	clk_put(esai->clk);
+	kfree(esai);
+
+	return 0;
+}
+
+
+static struct platform_driver imx_esai_driver = {
+	.probe = imx_esai_probe,
+	.remove = __devexit_p(imx_esai_remove),
+	.driver = {
+		   .name = "imx-esai",
+		   },
+};
+
+static int __init imx_esai_init(void)
+{
+	return platform_driver_register(&imx_esai_driver);
+}
+
+static void __exit imx_esai_exit(void)
+{
+	platform_driver_unregister(&imx_esai_driver);
+}
+
+module_init(imx_esai_init);
+module_exit(imx_esai_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("i.MX ASoC ESAI driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/imx/imx-esai.h b/sound/soc/imx/imx-esai.h
new file mode 100644
index 000000000000..ac50e72dc57b
--- /dev/null
+++ b/sound/soc/imx/imx-esai.h
@@ -0,0 +1,335 @@
+/*
+ * imx-esai.h  --  ESAI driver header file for Freescale IMX
+ *
+ * Copyright 2008-2011 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
+ */
+
+#ifndef _MXC_ESAI_H
+#define _MXC_ESAI_H
+
+#ifdef IMX_ESAI_DUMP
+#define ESAI_DUMP() \
+	do {pr_info("dump @ %s\n", __func__); \
+	pr_info("ecr %x\n", readl(esai->base + ESAI_ECR)); \
+	pr_info("esr %x\n", readl(esai->base + ESAI_ESR)); \
+	pr_info("tfcr %x\n", readl(esai->base + ESAI_TFCR)); \
+	pr_info("tfsr %x\n", readl(esai->base + ESAI_TFSR)); \
+	pr_info("rfcr %x\n", readl(esai->base + ESAI_RFCR)); \
+	pr_info("rfsr %x\n", readl(esai->base + ESAI_RFSR)); \
+	pr_info("tsr %x\n", readl(esai->base + ESAI_TSR)); \
+	pr_info("saisr %x\n", readl(esai->base + ESAI_SAISR)); \
+	pr_info("saicr %x\n", readl(esai->base + ESAI_SAICR)); \
+	pr_info("tcr %x\n", readl(esai->base + ESAI_TCR)); \
+	pr_info("tccr %x\n", readl(esai->base + ESAI_TCCR)); \
+	pr_info("rcr %x\n", readl(esai->base + ESAI_RCR)); \
+	pr_info("rccr %x\n", readl(esai->base + ESAI_RCCR)); \
+	pr_info("tsma %x\n", readl(esai->base + ESAI_TSMA)); \
+	pr_info("tsmb %x\n", readl(esai->base + ESAI_TSMB)); \
+	pr_info("rsma %x\n", readl(esai->base + ESAI_RSMA)); \
+	pr_info("rsmb %x\n", readl(esai->base + ESAI_RSMB)); \
+	pr_info("prrc %x\n", readl(esai->base + ESAI_PRRC)); \
+	pr_info("pcrc %x\n", readl(esai->base + ESAI_PCRC)); } while (0);
+#else
+#define ESAI_DUMP()
+#endif
+
+#define ESAI_ETDR	0x00
+#define ESAI_ERDR	0x04
+#define ESAI_ECR	0x08
+#define ESAI_ESR	0x0C
+#define ESAI_TFCR	0x10
+#define ESAI_TFSR	0x14
+#define ESAI_RFCR	0x18
+#define ESAI_RFSR	0x1C
+#define ESAI_TX0	0x80
+#define ESAI_TX1	0x84
+#define ESAI_TX2	0x88
+#define ESAI_TX3	0x8C
+#define ESAI_TX4	0x90
+#define ESAI_TX5	0x94
+#define ESAI_TSR	0x98
+#define ESAI_RX0	0xA0
+#define ESAI_RX1	0xA4
+#define ESAI_RX2	0xA8
+#define ESAI_RX3	0xAC
+#define ESAI_SAISR	0xCC
+#define ESAI_SAICR	0xD0
+#define ESAI_TCR	0xD4
+#define ESAI_TCCR	0xD8
+#define ESAI_RCR	0xDC
+#define ESAI_RCCR	0xE0
+#define ESAI_TSMA	0xE4
+#define ESAI_TSMB	0xE8
+#define ESAI_RSMA	0xEC
+#define ESAI_RSMB	0xF0
+#define ESAI_PRRC	0xF8
+#define ESAI_PCRC	0xFC
+
+#define ESAI_ECR_ETI	(1 << 19)
+#define ESAI_ECR_ETO	(1 << 18)
+#define ESAI_ECR_ERI	(1 << 17)
+#define ESAI_ECR_ERO	(1 << 16)
+#define ESAI_ECR_ERST	(1 << 1)
+#define ESAI_ECR_ESAIEN	(1 << 0)
+
+#define ESAI_ESR_TINIT	(1 << 10)
+#define ESAI_ESR_RFF	(1 << 9)
+#define ESAI_ESR_TFE	(1 << 8)
+#define ESAI_ESR_TLS	(1 << 7)
+#define ESAI_ESR_TDE	(1 << 6)
+#define ESAI_ESR_TED	(1 << 5)
+#define ESAI_ESR_TD	(1 << 4)
+#define ESAI_ESR_RLS	(1 << 3)
+#define ESAI_ESR_RDE	(1 << 2)
+#define ESAI_ESR_RED	(1 << 1)
+#define ESAI_ESR_RD	(1 << 0)
+
+#define ESAI_TFCR_TIEN	(1 << 19)
+#define ESAI_TFCR_TE5	(1 << 7)
+#define ESAI_TFCR_TE4	(1 << 6)
+#define ESAI_TFCR_TE3	(1 << 5)
+#define ESAI_TFCR_TE2	(1 << 4)
+#define ESAI_TFCR_TE1	(1 << 3)
+#define ESAI_TFCR_TE0	(1 << 2)
+#define ESAI_TFCR_TFR	(1 << 1)
+#define ESAI_TFCR_TFEN	(1 << 0)
+#define ESAI_TFCR_TE(x) ((0x3f >> (6 - ((x + 1) >> 1))) << 2)
+#define ESAI_TFCR_TE_MASK	0xfff03
+#define ESAI_TFCR_TFWM(x)	((x - 1) << 8)
+#define ESAI_TFCR_TWA_MASK	0xf8ffff
+
+#define ESAI_RFCR_REXT	(1 << 19)
+#define ESAI_RFCR_RE3	(1 << 5)
+#define ESAI_RFCR_RE2	(1 << 4)
+#define ESAI_RFCR_RE1	(1 << 3)
+#define ESAI_RFCR_RE0	(1 << 2)
+#define ESAI_RFCR_RFR	(1 << 1)
+#define ESAI_RFCR_RFEN	(1 << 0)
+#define ESAI_RFCR_RE(x) ((0xf >> (4 - ((x + 1) >> 1))) << 2)
+#define ESAI_RFCR_RE_MASK	0xfffc3
+#define ESAI_RFCR_RFWM(x)       ((x-1) << 8)
+#define ESAI_RFCR_RWA_MASK	0xf8ffff
+
+#define ESAI_WORD_LEN_32	(0x00 << 16)
+#define ESAI_WORD_LEN_28	(0x01 << 16)
+#define ESAI_WORD_LEN_24	(0x02 << 16)
+#define ESAI_WORD_LEN_20	(0x03 << 16)
+#define ESAI_WORD_LEN_16	(0x04 << 16)
+#define ESAI_WORD_LEN_12	(0x05 << 16)
+#define ESAI_WORD_LEN_8	(0x06 << 16)
+#define ESAI_WORD_LEN_4	(0x07 << 16)
+
+#define ESAI_SAISR_TODFE	(1 << 17)
+#define ESAI_SAISR_TEDE	(1 << 16)
+#define ESAI_SAISR_TDE	(1 << 15)
+#define ESAI_SAISR_TUE	(1 << 14)
+#define ESAI_SAISR_TFS	(1 << 13)
+#define ESAI_SAISR_RODF	(1 << 10)
+#define ESAI_SAISR_REDF	(1 << 9)
+#define ESAI_SAISR_RDF	(1 << 8)
+#define ESAI_SAISR_ROE	(1 << 7)
+#define ESAI_SAISR_RFS	(1 << 6)
+#define ESAI_SAISR_IF2	(1 << 2)
+#define ESAI_SAISR_IF1	(1 << 1)
+#define ESAI_SAISR_IF0	(1 << 0)
+
+#define ESAI_SAICR_ALC	(1 << 8)
+#define ESAI_SAICR_TEBE	(1 << 7)
+#define ESAI_SAICR_SYNC	(1 << 6)
+#define ESAI_SAICR_OF2	(1 << 2)
+#define ESAI_SAICR_OF1	(1 << 1)
+#define ESAI_SAICR_OF0	(1 << 0)
+
+#define ESAI_TCR_TLIE	(1 << 23)
+#define ESAI_TCR_TIE	(1 << 22)
+#define ESAI_TCR_TEDIE	(1 << 21)
+#define ESAI_TCR_TEIE	(1 << 20)
+#define ESAI_TCR_TPR	(1 << 19)
+#define ESAI_TCR_PADC	(1 << 17)
+#define ESAI_TCR_TFSR	(1 << 16)
+#define ESAI_TCR_TFSL	(1 << 15)
+#define ESAI_TCR_TWA	(1 << 7)
+#define ESAI_TCR_TSHFD_MSB	(0 << 6)
+#define ESAI_TCR_TSHFD_LSB	(1 << 6)
+#define ESAI_TCR_TE5	(1 << 5)
+#define ESAI_TCR_TE4	(1 << 4)
+#define ESAI_TCR_TE3	(1 << 3)
+#define ESAI_TCR_TE2	(1 << 2)
+#define ESAI_TCR_TE1	(1 << 1)
+#define ESAI_TCR_TE0	(1 << 0)
+#define ESAI_TCR_TE(x) (0x3f >> (6 - ((x + 1) >> 1)))
+
+#define ESAI_TCR_TSWS_MASK	0xff83ff
+#define ESAI_TCR_TSWS_STL8_WDL8	(0x00 << 10)
+#define ESAI_TCR_TSWS_STL12_WDL8	(0x04 << 10)
+#define ESAI_TCR_TSWS_STL12_WDL12	(0x01 << 10)
+#define ESAI_TCR_TSWS_STL16_WDL8	(0x08 << 10)
+#define ESAI_TCR_TSWS_STL16_WDL12	(0x05 << 10)
+#define ESAI_TCR_TSWS_STL16_WDL16	(0x02 << 10)
+#define ESAI_TCR_TSWS_STL20_WDL8	(0x0c << 10)
+#define ESAI_TCR_TSWS_STL20_WDL12	(0x09 << 10)
+#define ESAI_TCR_TSWS_STL20_WDL16	(0x06 << 10)
+#define ESAI_TCR_TSWS_STL20_WDL20	(0x03 << 10)
+#define ESAI_TCR_TSWS_STL24_WDL8	(0x10 << 10)
+#define ESAI_TCR_TSWS_STL24_WDL12	(0x0d << 10)
+#define ESAI_TCR_TSWS_STL24_WDL16	(0x0a << 10)
+#define ESAI_TCR_TSWS_STL24_WDL20	(0x07 << 10)
+#define ESAI_TCR_TSWS_STL24_WDL24	(0x1e << 10)
+#define ESAI_TCR_TSWS_STL32_WDL8	(0x18 << 10)
+#define ESAI_TCR_TSWS_STL32_WDL12	(0x15 << 10)
+#define ESAI_TCR_TSWS_STL32_WDL16	(0x12 << 10)
+#define ESAI_TCR_TSWS_STL32_WDL20	(0x0f << 10)
+#define ESAI_TCR_TSWS_STL32_WDL24	(0x1f << 10)
+
+#define ESAI_TCR_TMOD_MASK	0xfffcff
+#define ESAI_TCR_TMOD_NORMAL	(0x00 << 8)
+#define ESAI_TCR_TMOD_ONDEMAND	(0x01 << 8)
+#define ESAI_TCR_TMOD_NETWORK	(0x01 << 8)
+#define ESAI_TCR_TMOD_RESERVED (0x02 << 8)
+#define ESAI_TCR_TMOD_AC97	(0x03 << 8)
+
+#define ESAI_TCCR_THCKD	(1 << 23)
+#define ESAI_TCCR_TFSD	(1 << 22)
+#define ESAI_TCCR_TCKD	(1 << 21)
+#define ESAI_TCCR_THCKP	(1 << 20)
+#define ESAI_TCCR_TFSP	(1 << 19)
+#define ESAI_TCCR_TCKP	(1 << 18)
+
+#define ESAI_TCCR_TPSR_MASK 0xfffeff
+#define ESAI_TCCR_TPSR_BYPASS (1 << 8)
+#define ESAI_TCCR_TPSR_DIV8 (0 << 8)
+
+#define ESAI_TCCR_TFP_MASK	0xfc3fff
+#define ESAI_TCCR_TFP(x)	((x & 0xf) << 14)
+
+#define ESAI_TCCR_TDC_MASK	0xffc1ff
+#define ESAI_TCCR_TDC(x)	(((x) & 0x1f) << 9)
+
+#define ESAI_TCCR_TPM_MASK	0xffff00
+#define ESAI_TCCR_TPM(x)	(x & 0xff)
+
+#define ESAI_RCR_RLIE	(1 << 23)
+#define ESAI_RCR_RIE	(1 << 22)
+#define ESAI_RCR_REDIE	(1 << 21)
+#define ESAI_RCR_REIE	(1 << 20)
+#define ESAI_RCR_RPR	(1 << 19)
+#define ESAI_RCR_RFSR	(1 << 16)
+#define ESAI_RCR_RFSL	(1 << 15)
+#define ESAI_RCR_RWA	(1 << 7)
+#define ESAI_RCR_RSHFD_MSB (0 << 6)
+#define ESAI_RCR_RSHFD_LSB (1 << 6)
+#define ESAI_RCR_RE3	(1 << 3)
+#define ESAI_RCR_RE2	(1 << 2)
+#define ESAI_RCR_RE1	(1 << 1)
+#define ESAI_RCR_RE0	(1 << 0)
+#define ESAI_RCR_RE(x) (0xf >> (4 - ((x + 1) >> 1)))
+
+#define ESAI_RCR_RSWS_MASK	0xff83ff
+#define ESAI_RCR_RSWS_STL8_WDL8	(0x00 << 10)
+#define ESAI_RCR_RSWS_STL12_WDL8	(0x04 << 10)
+#define ESAI_RCR_RSWS_STL12_WDL12	(0x01 << 10)
+#define ESAI_RCR_RSWS_STL16_WDL8	(0x08 << 10)
+#define ESAI_RCR_RSWS_STL16_WDL12	(0x05 << 10)
+#define ESAI_RCR_RSWS_STL16_WDL16	(0x02 << 10)
+#define ESAI_RCR_RSWS_STL20_WDL8	(0x0c << 10)
+#define ESAI_RCR_RSWS_STL20_WDL12	(0x09 << 10)
+#define ESAI_RCR_RSWS_STL20_WDL16	(0x06 << 10)
+#define ESAI_RCR_RSWS_STL20_WDL20	(0x03 << 10)
+#define ESAI_RCR_RSWS_STL24_WDL8	(0x10 << 10)
+#define ESAI_RCR_RSWS_STL24_WDL12	(0x0d << 10)
+#define ESAI_RCR_RSWS_STL24_WDL16	(0x0a << 10)
+#define ESAI_RCR_RSWS_STL24_WDL20	(0x07 << 10)
+#define ESAI_RCR_RSWS_STL24_WDL24	(0x1e << 10)
+#define ESAI_RCR_RSWS_STL32_WDL8	(0x18 << 10)
+#define ESAI_RCR_RSWS_STL32_WDL12	(0x15 << 10)
+#define ESAI_RCR_RSWS_STL32_WDL16	(0x12 << 10)
+#define ESAI_RCR_RSWS_STL32_WDL20	(0x0f << 10)
+#define ESAI_RCR_RSWS_STL32_WDL24	(0x1f << 10)
+
+#define ESAI_RCR_RMOD_MASK	0xfffcff
+#define ESAI_RCR_RMOD_NORMAL	(0x00 << 8)
+#define ESAI_RCR_RMOD_ONDEMAND	(0x01 << 8)
+#define ESAI_RCR_RMOD_NETWORK	(0x01 << 8)
+#define ESAI_RCR_RMOD_RESERVED (0x02 << 8)
+#define ESAI_RCR_RMOD_AC97	(0x03 << 8)
+
+#define ESAI_RCCR_RHCKD	(1 << 23)
+#define ESAI_RCCR_RFSD	(1 << 22)
+#define ESAI_RCCR_RCKD	(1 << 21)
+#define ESAI_RCCR_RHCKP	(1 << 20)
+#define ESAI_RCCR_RFSP	(1 << 19)
+#define ESAI_RCCR_RCKP	(1 << 18)
+
+#define ESAI_RCCR_RPSR_MASK 0xfffeff
+#define ESAI_RCCR_RPSR_BYPASS (1 << 8)
+#define ESAI_RCCR_RPSR_DIV8 (0 << 8)
+
+#define ESAI_RCCR_RFP_MASK	0xfc3fff
+#define ESAI_RCCR_RFP(x)	((x & 0xf) << 14)
+
+#define ESAI_RCCR_RDC_MASK	0xffc1ff
+#define ESAI_RCCR_RDC(x)	(((x) & 0x1f) << 9)
+
+#define ESAI_RCCR_RPM_MASK	0xffff00
+#define ESAI_RCCR_RPM(x)	(x & 0xff)
+
+#define ESAI_GPIO_ESAI	0xfff
+
+/* ESAI clock source */
+#define ESAI_CLK_FSYS	0
+#define ESAI_CLK_EXTAL 1
+#define ESAI_CLK_EXTAL_DIV 2
+
+/* ESAI clock divider */
+#define ESAI_TX_DIV_PSR	0
+#define ESAI_TX_DIV_PM 1
+#define ESAI_TX_DIV_FP	2
+#define ESAI_RX_DIV_PSR	3
+#define ESAI_RX_DIV_PM	4
+#define ESAI_RX_DIV_FP	5
+
+#define IMX_ESAI_DMABUF_SIZE     (64 * 1024)
+
+#define DRV_NAME "imx-esai"
+
+#include <linux/dmaengine.h>
+#include <mach/dma.h>
+
+struct imx_esai {
+	struct platform_device *ac97_dev;
+	struct snd_soc_dai *imx_ac97;
+	struct clk *clk;
+	void __iomem *base;
+	int irq;
+	int fiq_enable;
+	unsigned int offset;
+
+	unsigned int flags;
+
+	void (*ac97_reset) (struct snd_ac97 *ac97);
+	void (*ac97_warm_reset)(struct snd_ac97 *ac97);
+
+	struct imx_pcm_dma_params dma_params_rx;
+	struct imx_pcm_dma_params dma_params_tx;
+
+	int enabled;
+
+	struct platform_device *soc_platform_pdev;
+	struct platform_device *soc_platform_pdev_fiq;
+};
+int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, \
+	struct vm_area_struct *vma);
+int imx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
+	struct snd_pcm *pcm);
+void imx_pcm_free(struct snd_pcm *pcm);
+
+#endif