Initial import

1 files changed, 1600 insertions, 0 deletions

diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
new file mode 100644
index 000000000..4e3e607de
--- /dev/null
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -0,0 +1,1600 @@
+/*
+ * ALSA SoC Texas Instruments TLV320DAC33 codec driver
+ *
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * Copyright:   (C) 2009 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include <sound/tlv320dac33-plat.h>
+#include "tlv320dac33.h"
+
+/*
+ * The internal FIFO is 24576 bytes long
+ * It can be configured to hold 16bit or 24bit samples
+ * In 16bit configuration the FIFO can hold 6144 stereo samples
+ * In 24bit configuration the FIFO can hold 4096 stereo samples
+ */
+#define DAC33_FIFO_SIZE_16BIT	6144
+#define DAC33_FIFO_SIZE_24BIT	4096
+#define DAC33_MODE7_MARGIN	10	/* Safety margin for FIFO in Mode7 */
+
+#define BURST_BASEFREQ_HZ	49152000
+
+#define SAMPLES_TO_US(rate, samples) \
+	(1000000000 / (((rate) * 1000) / (samples)))
+
+#define US_TO_SAMPLES(rate, us) \
+	((rate) / (1000000 / ((us) < 1000000 ? (us) : 1000000)))
+
+#define UTHR_FROM_PERIOD_SIZE(samples, playrate, burstrate) \
+	(((samples)*5000) / (((burstrate)*5000) / ((burstrate) - (playrate))))
+
+static void dac33_calculate_times(struct snd_pcm_substream *substream,
+				  struct snd_soc_codec *codec);
+static int dac33_prepare_chip(struct snd_pcm_substream *substream,
+			      struct snd_soc_codec *codec);
+
+enum dac33_state {
+	DAC33_IDLE = 0,
+	DAC33_PREFILL,
+	DAC33_PLAYBACK,
+	DAC33_FLUSH,
+};
+
+enum dac33_fifo_modes {
+	DAC33_FIFO_BYPASS = 0,
+	DAC33_FIFO_MODE1,
+	DAC33_FIFO_MODE7,
+	DAC33_FIFO_LAST_MODE,
+};
+
+#define DAC33_NUM_SUPPLIES 3
+static const char *dac33_supply_names[DAC33_NUM_SUPPLIES] = {
+	"AVDD",
+	"DVDD",
+	"IOVDD",
+};
+
+struct tlv320dac33_priv {
+	struct mutex mutex;
+	struct workqueue_struct *dac33_wq;
+	struct work_struct work;
+	struct snd_soc_codec *codec;
+	struct regulator_bulk_data supplies[DAC33_NUM_SUPPLIES];
+	struct snd_pcm_substream *substream;
+	int power_gpio;
+	int chip_power;
+	int irq;
+	unsigned int refclk;
+
+	unsigned int alarm_threshold;	/* set to be half of LATENCY_TIME_MS */
+	enum dac33_fifo_modes fifo_mode;/* FIFO mode selection */
+	unsigned int fifo_size;		/* Size of the FIFO in samples */
+	unsigned int nsample;		/* burst read amount from host */
+	int mode1_latency;		/* latency caused by the i2c writes in
+					 * us */
+	u8 burst_bclkdiv;		/* BCLK divider value in burst mode */
+	unsigned int burst_rate;	/* Interface speed in Burst modes */
+
+	int keep_bclk;			/* Keep the BCLK continuously running
+					 * in FIFO modes */
+	spinlock_t lock;
+	unsigned long long t_stamp1;	/* Time stamp for FIFO modes to */
+	unsigned long long t_stamp2;	/* calculate the FIFO caused delay */
+
+	unsigned int mode1_us_burst;	/* Time to burst read n number of
+					 * samples */
+	unsigned int mode7_us_to_lthr;	/* Time to reach lthr from uthr */
+
+	unsigned int uthr;
+
+	enum dac33_state state;
+	void *control_data;
+};
+
+static const u8 dac33_reg[DAC33_CACHEREGNUM] = {
+0x00, 0x00, 0x00, 0x00, /* 0x00 - 0x03 */
+0x00, 0x00, 0x00, 0x00, /* 0x04 - 0x07 */
+0x00, 0x00, 0x00, 0x00, /* 0x08 - 0x0b */
+0x00, 0x00, 0x00, 0x00, /* 0x0c - 0x0f */
+0x00, 0x00, 0x00, 0x00, /* 0x10 - 0x13 */
+0x00, 0x00, 0x00, 0x00, /* 0x14 - 0x17 */
+0x00, 0x00, 0x00, 0x00, /* 0x18 - 0x1b */
+0x00, 0x00, 0x00, 0x00, /* 0x1c - 0x1f */
+0x00, 0x00, 0x00, 0x00, /* 0x20 - 0x23 */
+0x00, 0x00, 0x00, 0x00, /* 0x24 - 0x27 */
+0x00, 0x00, 0x00, 0x00, /* 0x28 - 0x2b */
+0x00, 0x00, 0x00, 0x80, /* 0x2c - 0x2f */
+0x80, 0x00, 0x00, 0x00, /* 0x30 - 0x33 */
+0x00, 0x00, 0x00, 0x00, /* 0x34 - 0x37 */
+0x00, 0x00,             /* 0x38 - 0x39 */
+/* Registers 0x3a - 0x3f are reserved  */
+            0x00, 0x00, /* 0x3a - 0x3b */
+0x00, 0x00, 0x00, 0x00, /* 0x3c - 0x3f */
+
+0x00, 0x00, 0x00, 0x00, /* 0x40 - 0x43 */
+0x00, 0x80,             /* 0x44 - 0x45 */
+/* Registers 0x46 - 0x47 are reserved  */
+            0x80, 0x80, /* 0x46 - 0x47 */
+
+0x80, 0x00, 0x00,       /* 0x48 - 0x4a */
+/* Registers 0x4b - 0x7c are reserved  */
+                  0x00, /* 0x4b        */
+0x00, 0x00, 0x00, 0x00, /* 0x4c - 0x4f */
+0x00, 0x00, 0x00, 0x00, /* 0x50 - 0x53 */
+0x00, 0x00, 0x00, 0x00, /* 0x54 - 0x57 */
+0x00, 0x00, 0x00, 0x00, /* 0x58 - 0x5b */
+0x00, 0x00, 0x00, 0x00, /* 0x5c - 0x5f */
+0x00, 0x00, 0x00, 0x00, /* 0x60 - 0x63 */
+0x00, 0x00, 0x00, 0x00, /* 0x64 - 0x67 */
+0x00, 0x00, 0x00, 0x00, /* 0x68 - 0x6b */
+0x00, 0x00, 0x00, 0x00, /* 0x6c - 0x6f */
+0x00, 0x00, 0x00, 0x00, /* 0x70 - 0x73 */
+0x00, 0x00, 0x00, 0x00, /* 0x74 - 0x77 */
+0x00, 0x00, 0x00, 0x00, /* 0x78 - 0x7b */
+0x00,                   /* 0x7c        */
+
+      0xda, 0x33, 0x03, /* 0x7d - 0x7f */
+};
+
+/* Register read and write */
+static inline unsigned int dac33_read_reg_cache(struct snd_soc_codec *codec,
+						unsigned reg)
+{
+	u8 *cache = codec->reg_cache;
+	if (reg >= DAC33_CACHEREGNUM)
+		return 0;
+
+	return cache[reg];
+}
+
+static inline void dac33_write_reg_cache(struct snd_soc_codec *codec,
+					 u8 reg, u8 value)
+{
+	u8 *cache = codec->reg_cache;
+	if (reg >= DAC33_CACHEREGNUM)
+		return;
+
+	cache[reg] = value;
+}
+
+static int dac33_read(struct snd_soc_codec *codec, unsigned int reg,
+		      u8 *value)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int val, ret = 0;
+
+	*value = reg & 0xff;
+
+	/* If powered off, return the cached value */
+	if (dac33->chip_power) {
+		val = i2c_smbus_read_byte_data(codec->control_data, value[0]);
+		if (val < 0) {
+			dev_err(codec->dev, "Read failed (%d)\n", val);
+			value[0] = dac33_read_reg_cache(codec, reg);
+			ret = val;
+		} else {
+			value[0] = val;
+			dac33_write_reg_cache(codec, reg, val);
+		}
+	} else {
+		value[0] = dac33_read_reg_cache(codec, reg);
+	}
+
+	return ret;
+}
+
+static int dac33_write(struct snd_soc_codec *codec, unsigned int reg,
+		       unsigned int value)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 data[2];
+	int ret = 0;
+
+	/*
+	 * data is
+	 *   D15..D8 dac33 register offset
+	 *   D7...D0 register data
+	 */
+	data[0] = reg & 0xff;
+	data[1] = value & 0xff;
+
+	dac33_write_reg_cache(codec, data[0], data[1]);
+	if (dac33->chip_power) {
+		ret = codec->hw_write(codec->control_data, data, 2);
+		if (ret != 2)
+			dev_err(codec->dev, "Write failed (%d)\n", ret);
+		else
+			ret = 0;
+	}
+
+	return ret;
+}
+
+static int dac33_write_locked(struct snd_soc_codec *codec, unsigned int reg,
+		       unsigned int value)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int ret;
+
+	mutex_lock(&dac33->mutex);
+	ret = dac33_write(codec, reg, value);
+	mutex_unlock(&dac33->mutex);
+
+	return ret;
+}
+
+#define DAC33_I2C_ADDR_AUTOINC	0x80
+static int dac33_write16(struct snd_soc_codec *codec, unsigned int reg,
+		       unsigned int value)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 data[3];
+	int ret = 0;
+
+	/*
+	 * data is
+	 *   D23..D16 dac33 register offset
+	 *   D15..D8  register data MSB
+	 *   D7...D0  register data LSB
+	 */
+	data[0] = reg & 0xff;
+	data[1] = (value >> 8) & 0xff;
+	data[2] = value & 0xff;
+
+	dac33_write_reg_cache(codec, data[0], data[1]);
+	dac33_write_reg_cache(codec, data[0] + 1, data[2]);
+
+	if (dac33->chip_power) {
+		/* We need to set autoincrement mode for 16 bit writes */
+		data[0] |= DAC33_I2C_ADDR_AUTOINC;
+		ret = codec->hw_write(codec->control_data, data, 3);
+		if (ret != 3)
+			dev_err(codec->dev, "Write failed (%d)\n", ret);
+		else
+			ret = 0;
+	}
+
+	return ret;
+}
+
+static void dac33_init_chip(struct snd_soc_codec *codec)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	if (unlikely(!dac33->chip_power))
+		return;
+
+	/* A : DAC sample rate Fsref/1.5 */
+	dac33_write(codec, DAC33_DAC_CTRL_A, DAC33_DACRATE(0));
+	/* B : DAC src=normal, not muted */
+	dac33_write(codec, DAC33_DAC_CTRL_B, DAC33_DACSRCR_RIGHT |
+					     DAC33_DACSRCL_LEFT);
+	/* C : (defaults) */
+	dac33_write(codec, DAC33_DAC_CTRL_C, 0x00);
+
+	/* 73 : volume soft stepping control,
+	 clock source = internal osc (?) */
+	dac33_write(codec, DAC33_ANA_VOL_SOFT_STEP_CTRL, DAC33_VOLCLKEN);
+
+	/* Restore only selected registers (gains mostly) */
+	dac33_write(codec, DAC33_LDAC_DIG_VOL_CTRL,
+		    dac33_read_reg_cache(codec, DAC33_LDAC_DIG_VOL_CTRL));
+	dac33_write(codec, DAC33_RDAC_DIG_VOL_CTRL,
+		    dac33_read_reg_cache(codec, DAC33_RDAC_DIG_VOL_CTRL));
+
+	dac33_write(codec, DAC33_LINEL_TO_LLO_VOL,
+		    dac33_read_reg_cache(codec, DAC33_LINEL_TO_LLO_VOL));
+	dac33_write(codec, DAC33_LINER_TO_RLO_VOL,
+		    dac33_read_reg_cache(codec, DAC33_LINER_TO_RLO_VOL));
+
+	dac33_write(codec, DAC33_OUT_AMP_CTRL,
+		    dac33_read_reg_cache(codec, DAC33_OUT_AMP_CTRL));
+
+	dac33_write(codec, DAC33_LDAC_PWR_CTRL,
+		    dac33_read_reg_cache(codec, DAC33_LDAC_PWR_CTRL));
+	dac33_write(codec, DAC33_RDAC_PWR_CTRL,
+		    dac33_read_reg_cache(codec, DAC33_RDAC_PWR_CTRL));
+}
+
+static inline int dac33_read_id(struct snd_soc_codec *codec)
+{
+	int i, ret = 0;
+	u8 reg;
+
+	for (i = 0; i < 3; i++) {
+		ret = dac33_read(codec, DAC33_DEVICE_ID_MSB + i, &reg);
+		if (ret < 0)
+			break;
+	}
+
+	return ret;
+}
+
+static inline void dac33_soft_power(struct snd_soc_codec *codec, int power)
+{
+	u8 reg;
+
+	reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
+	if (power)
+		reg |= DAC33_PDNALLB;
+	else
+		reg &= ~(DAC33_PDNALLB | DAC33_OSCPDNB |
+			 DAC33_DACRPDNB | DAC33_DACLPDNB);
+	dac33_write(codec, DAC33_PWR_CTRL, reg);
+}
+
+static inline void dac33_disable_digital(struct snd_soc_codec *codec)
+{
+	u8 reg;
+
+	/* Stop the DAI clock */
+	reg = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
+	reg &= ~DAC33_BCLKON;
+	dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, reg);
+
+	/* Power down the Oscillator, and DACs */
+	reg = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
+	reg &= ~(DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB);
+	dac33_write(codec, DAC33_PWR_CTRL, reg);
+}
+
+static int dac33_hard_power(struct snd_soc_codec *codec, int power)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+
+	mutex_lock(&dac33->mutex);
+
+	/* Safety check */
+	if (unlikely(power == dac33->chip_power)) {
+		dev_dbg(codec->dev, "Trying to set the same power state: %s\n",
+			power ? "ON" : "OFF");
+		goto exit;
+	}
+
+	if (power) {
+		ret = regulator_bulk_enable(ARRAY_SIZE(dac33->supplies),
+					  dac33->supplies);
+		if (ret != 0) {
+			dev_err(codec->dev,
+				"Failed to enable supplies: %d\n", ret);
+				goto exit;
+		}
+
+		if (dac33->power_gpio >= 0)
+			gpio_set_value(dac33->power_gpio, 1);
+
+		dac33->chip_power = 1;
+	} else {
+		dac33_soft_power(codec, 0);
+		if (dac33->power_gpio >= 0)
+			gpio_set_value(dac33->power_gpio, 0);
+
+		ret = regulator_bulk_disable(ARRAY_SIZE(dac33->supplies),
+					     dac33->supplies);
+		if (ret != 0) {
+			dev_err(codec->dev,
+				"Failed to disable supplies: %d\n", ret);
+			goto exit;
+		}
+
+		dac33->chip_power = 0;
+	}
+
+exit:
+	mutex_unlock(&dac33->mutex);
+	return ret;
+}
+
+static int dac33_playback_event(struct snd_soc_dapm_widget *w,
+		struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		if (likely(dac33->substream)) {
+			dac33_calculate_times(dac33->substream, codec);
+			dac33_prepare_chip(dac33->substream, codec);
+		}
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		dac33_disable_digital(codec);
+		break;
+	}
+	return 0;
+}
+
+static int dac33_get_fifo_mode(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	ucontrol->value.integer.value[0] = dac33->fifo_mode;
+
+	return 0;
+}
+
+static int dac33_set_fifo_mode(struct snd_kcontrol *kcontrol,
+			 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+
+	if (dac33->fifo_mode == ucontrol->value.integer.value[0])
+		return 0;
+	/* Do not allow changes while stream is running*/
+	if (snd_soc_codec_is_active(codec))
+		return -EPERM;
+
+	if (ucontrol->value.integer.value[0] < 0 ||
+	    ucontrol->value.integer.value[0] >= DAC33_FIFO_LAST_MODE)
+		ret = -EINVAL;
+	else
+		dac33->fifo_mode = ucontrol->value.integer.value[0];
+
+	return ret;
+}
+
+/* Codec operation modes */
+static const char *dac33_fifo_mode_texts[] = {
+	"Bypass", "Mode 1", "Mode 7"
+};
+
+static SOC_ENUM_SINGLE_EXT_DECL(dac33_fifo_mode_enum, dac33_fifo_mode_texts);
+
+/* L/R Line Output Gain */
+static const char *lr_lineout_gain_texts[] = {
+	"Line -12dB DAC 0dB", "Line -6dB DAC 6dB",
+	"Line 0dB DAC 12dB", "Line 6dB DAC 18dB",
+};
+
+static SOC_ENUM_SINGLE_DECL(l_lineout_gain_enum,
+			    DAC33_LDAC_PWR_CTRL, 0,
+			    lr_lineout_gain_texts);
+
+static SOC_ENUM_SINGLE_DECL(r_lineout_gain_enum,
+			    DAC33_RDAC_PWR_CTRL, 0,
+			    lr_lineout_gain_texts);
+
+/*
+ * DACL/R digital volume control:
+ * from 0 dB to -63.5 in 0.5 dB steps
+ * Need to be inverted later on:
+ * 0x00 == 0 dB
+ * 0x7f == -63.5 dB
+ */
+static DECLARE_TLV_DB_SCALE(dac_digivol_tlv, -6350, 50, 0);
+
+static const struct snd_kcontrol_new dac33_snd_controls[] = {
+	SOC_DOUBLE_R_TLV("DAC Digital Playback Volume",
+		DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL,
+		0, 0x7f, 1, dac_digivol_tlv),
+	SOC_DOUBLE_R("DAC Digital Playback Switch",
+		 DAC33_LDAC_DIG_VOL_CTRL, DAC33_RDAC_DIG_VOL_CTRL, 7, 1, 1),
+	SOC_DOUBLE_R("Line to Line Out Volume",
+		 DAC33_LINEL_TO_LLO_VOL, DAC33_LINER_TO_RLO_VOL, 0, 127, 1),
+	SOC_ENUM("Left Line Output Gain", l_lineout_gain_enum),
+	SOC_ENUM("Right Line Output Gain", r_lineout_gain_enum),
+};
+
+static const struct snd_kcontrol_new dac33_mode_snd_controls[] = {
+	SOC_ENUM_EXT("FIFO Mode", dac33_fifo_mode_enum,
+		 dac33_get_fifo_mode, dac33_set_fifo_mode),
+};
+
+/* Analog bypass */
+static const struct snd_kcontrol_new dac33_dapm_abypassl_control =
+	SOC_DAPM_SINGLE("Switch", DAC33_LINEL_TO_LLO_VOL, 7, 1, 1);
+
+static const struct snd_kcontrol_new dac33_dapm_abypassr_control =
+	SOC_DAPM_SINGLE("Switch", DAC33_LINER_TO_RLO_VOL, 7, 1, 1);
+
+/* LOP L/R invert selection */
+static const char *dac33_lr_lom_texts[] = {"DAC", "LOP"};
+
+static SOC_ENUM_SINGLE_DECL(dac33_left_lom_enum,
+			    DAC33_OUT_AMP_CTRL, 3,
+			    dac33_lr_lom_texts);
+
+static const struct snd_kcontrol_new dac33_dapm_left_lom_control =
+SOC_DAPM_ENUM("Route", dac33_left_lom_enum);
+
+static SOC_ENUM_SINGLE_DECL(dac33_right_lom_enum,
+			    DAC33_OUT_AMP_CTRL, 2,
+			    dac33_lr_lom_texts);
+
+static const struct snd_kcontrol_new dac33_dapm_right_lom_control =
+SOC_DAPM_ENUM("Route", dac33_right_lom_enum);
+
+static const struct snd_soc_dapm_widget dac33_dapm_widgets[] = {
+	SND_SOC_DAPM_OUTPUT("LEFT_LO"),
+	SND_SOC_DAPM_OUTPUT("RIGHT_LO"),
+
+	SND_SOC_DAPM_INPUT("LINEL"),
+	SND_SOC_DAPM_INPUT("LINER"),
+
+	SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
+
+	/* Analog bypass */
+	SND_SOC_DAPM_SWITCH("Analog Left Bypass", SND_SOC_NOPM, 0, 0,
+				&dac33_dapm_abypassl_control),
+	SND_SOC_DAPM_SWITCH("Analog Right Bypass", SND_SOC_NOPM, 0, 0,
+				&dac33_dapm_abypassr_control),
+
+	SND_SOC_DAPM_MUX("Left LOM Inverted From", SND_SOC_NOPM, 0, 0,
+		&dac33_dapm_left_lom_control),
+	SND_SOC_DAPM_MUX("Right LOM Inverted From", SND_SOC_NOPM, 0, 0,
+		&dac33_dapm_right_lom_control),
+	/*
+	 * For DAPM path, when only the anlog bypass path is enabled, and the
+	 * LOP inverted from the corresponding DAC side.
+	 * This is needed, so we can attach the DAC power supply in this case.
+	 */
+	SND_SOC_DAPM_PGA("Left Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Bypass PGA", SND_SOC_NOPM, 0, 0, NULL, 0),
+
+	SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Left Amplifier",
+			 DAC33_OUT_AMP_PWR_CTRL, 6, 3, 3, 0),
+	SND_SOC_DAPM_REG(snd_soc_dapm_mixer, "Output Right Amplifier",
+			 DAC33_OUT_AMP_PWR_CTRL, 4, 3, 3, 0),
+
+	SND_SOC_DAPM_SUPPLY("Left DAC Power",
+			    DAC33_LDAC_PWR_CTRL, 2, 0, NULL, 0),
+	SND_SOC_DAPM_SUPPLY("Right DAC Power",
+			    DAC33_RDAC_PWR_CTRL, 2, 0, NULL, 0),
+
+	SND_SOC_DAPM_SUPPLY("Codec Power",
+			    DAC33_PWR_CTRL, 4, 0, NULL, 0),
+
+	SND_SOC_DAPM_PRE("Pre Playback", dac33_playback_event),
+	SND_SOC_DAPM_POST("Post Playback", dac33_playback_event),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+	/* Analog bypass */
+	{"Analog Left Bypass", "Switch", "LINEL"},
+	{"Analog Right Bypass", "Switch", "LINER"},
+
+	{"Output Left Amplifier", NULL, "DACL"},
+	{"Output Right Amplifier", NULL, "DACR"},
+
+	{"Left Bypass PGA", NULL, "Analog Left Bypass"},
+	{"Right Bypass PGA", NULL, "Analog Right Bypass"},
+
+	{"Left LOM Inverted From", "DAC", "Left Bypass PGA"},
+	{"Right LOM Inverted From", "DAC", "Right Bypass PGA"},
+	{"Left LOM Inverted From", "LOP", "Analog Left Bypass"},
+	{"Right LOM Inverted From", "LOP", "Analog Right Bypass"},
+
+	{"Output Left Amplifier", NULL, "Left LOM Inverted From"},
+	{"Output Right Amplifier", NULL, "Right LOM Inverted From"},
+
+	{"DACL", NULL, "Left DAC Power"},
+	{"DACR", NULL, "Right DAC Power"},
+
+	{"Left Bypass PGA", NULL, "Left DAC Power"},
+	{"Right Bypass PGA", NULL, "Right DAC Power"},
+
+	/* output */
+	{"LEFT_LO", NULL, "Output Left Amplifier"},
+	{"RIGHT_LO", NULL, "Output Right Amplifier"},
+
+	{"LEFT_LO", NULL, "Codec Power"},
+	{"RIGHT_LO", NULL, "Codec Power"},
+};
+
+static int dac33_set_bias_level(struct snd_soc_codec *codec,
+				enum snd_soc_bias_level level)
+{
+	int ret;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+			/* Coming from OFF, switch on the codec */
+			ret = dac33_hard_power(codec, 1);
+			if (ret != 0)
+				return ret;
+
+			dac33_init_chip(codec);
+		}
+		break;
+	case SND_SOC_BIAS_OFF:
+		/* Do not power off, when the codec is already off */
+		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+			return 0;
+		ret = dac33_hard_power(codec, 0);
+		if (ret != 0)
+			return ret;
+		break;
+	}
+	codec->dapm.bias_level = level;
+
+	return 0;
+}
+
+static inline void dac33_prefill_handler(struct tlv320dac33_priv *dac33)
+{
+	struct snd_soc_codec *codec = dac33->codec;
+	unsigned int delay;
+	unsigned long flags;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		dac33_write16(codec, DAC33_NSAMPLE_MSB,
+			DAC33_THRREG(dac33->nsample));
+
+		/* Take the timestamps */
+		spin_lock_irqsave(&dac33->lock, flags);
+		dac33->t_stamp2 = ktime_to_us(ktime_get());
+		dac33->t_stamp1 = dac33->t_stamp2;
+		spin_unlock_irqrestore(&dac33->lock, flags);
+
+		dac33_write16(codec, DAC33_PREFILL_MSB,
+				DAC33_THRREG(dac33->alarm_threshold));
+		/* Enable Alarm Threshold IRQ with a delay */
+		delay = SAMPLES_TO_US(dac33->burst_rate,
+				     dac33->alarm_threshold) + 1000;
+		usleep_range(delay, delay + 500);
+		dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MAT);
+		break;
+	case DAC33_FIFO_MODE7:
+		/* Take the timestamp */
+		spin_lock_irqsave(&dac33->lock, flags);
+		dac33->t_stamp1 = ktime_to_us(ktime_get());
+		/* Move back the timestamp with drain time */
+		dac33->t_stamp1 -= dac33->mode7_us_to_lthr;
+		spin_unlock_irqrestore(&dac33->lock, flags);
+
+		dac33_write16(codec, DAC33_PREFILL_MSB,
+				DAC33_THRREG(DAC33_MODE7_MARGIN));
+
+		/* Enable Upper Threshold IRQ */
+		dac33_write(codec, DAC33_FIFO_IRQ_MASK, DAC33_MUT);
+		break;
+	default:
+		dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
+							dac33->fifo_mode);
+		break;
+	}
+}
+
+static inline void dac33_playback_handler(struct tlv320dac33_priv *dac33)
+{
+	struct snd_soc_codec *codec = dac33->codec;
+	unsigned long flags;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		/* Take the timestamp */
+		spin_lock_irqsave(&dac33->lock, flags);
+		dac33->t_stamp2 = ktime_to_us(ktime_get());
+		spin_unlock_irqrestore(&dac33->lock, flags);
+
+		dac33_write16(codec, DAC33_NSAMPLE_MSB,
+				DAC33_THRREG(dac33->nsample));
+		break;
+	case DAC33_FIFO_MODE7:
+		/* At the moment we are not using interrupts in mode7 */
+		break;
+	default:
+		dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
+							dac33->fifo_mode);
+		break;
+	}
+}
+
+static void dac33_work(struct work_struct *work)
+{
+	struct snd_soc_codec *codec;
+	struct tlv320dac33_priv *dac33;
+	u8 reg;
+
+	dac33 = container_of(work, struct tlv320dac33_priv, work);
+	codec = dac33->codec;
+
+	mutex_lock(&dac33->mutex);
+	switch (dac33->state) {
+	case DAC33_PREFILL:
+		dac33->state = DAC33_PLAYBACK;
+		dac33_prefill_handler(dac33);
+		break;
+	case DAC33_PLAYBACK:
+		dac33_playback_handler(dac33);
+		break;
+	case DAC33_IDLE:
+		break;
+	case DAC33_FLUSH:
+		dac33->state = DAC33_IDLE;
+		/* Mask all interrupts from dac33 */
+		dac33_write(codec, DAC33_FIFO_IRQ_MASK, 0);
+
+		/* flush fifo */
+		reg = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
+		reg |= DAC33_FIFOFLUSH;
+		dac33_write(codec, DAC33_FIFO_CTRL_A, reg);
+		break;
+	}
+	mutex_unlock(&dac33->mutex);
+}
+
+static irqreturn_t dac33_interrupt_handler(int irq, void *dev)
+{
+	struct snd_soc_codec *codec = dev;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	unsigned long flags;
+
+	spin_lock_irqsave(&dac33->lock, flags);
+	dac33->t_stamp1 = ktime_to_us(ktime_get());
+	spin_unlock_irqrestore(&dac33->lock, flags);
+
+	/* Do not schedule the workqueue in Mode7 */
+	if (dac33->fifo_mode != DAC33_FIFO_MODE7)
+		queue_work(dac33->dac33_wq, &dac33->work);
+
+	return IRQ_HANDLED;
+}
+
+static void dac33_oscwait(struct snd_soc_codec *codec)
+{
+	int timeout = 60;
+	u8 reg;
+
+	do {
+		usleep_range(1000, 2000);
+		dac33_read(codec, DAC33_INT_OSC_STATUS, &reg);
+	} while (((reg & 0x03) != DAC33_OSCSTATUS_NORMAL) && timeout--);
+	if ((reg & 0x03) != DAC33_OSCSTATUS_NORMAL)
+		dev_err(codec->dev,
+			"internal oscillator calibration failed\n");
+}
+
+static int dac33_startup(struct snd_pcm_substream *substream,
+			   struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	/* Stream started, save the substream pointer */
+	dac33->substream = substream;
+
+	return 0;
+}
+
+static void dac33_shutdown(struct snd_pcm_substream *substream,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	dac33->substream = NULL;
+}
+
+#define CALC_BURST_RATE(bclkdiv, bclk_per_sample) \
+	(BURST_BASEFREQ_HZ / bclkdiv / bclk_per_sample)
+static int dac33_hw_params(struct snd_pcm_substream *substream,
+			   struct snd_pcm_hw_params *params,
+			   struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	/* Check parameters for validity */
+	switch (params_rate(params)) {
+	case 44100:
+	case 48000:
+		break;
+	default:
+		dev_err(codec->dev, "unsupported rate %d\n",
+			params_rate(params));
+		return -EINVAL;
+	}
+
+	switch (params_width(params)) {
+	case 16:
+		dac33->fifo_size = DAC33_FIFO_SIZE_16BIT;
+		dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 32);
+		break;
+	case 32:
+		dac33->fifo_size = DAC33_FIFO_SIZE_24BIT;
+		dac33->burst_rate = CALC_BURST_RATE(dac33->burst_bclkdiv, 64);
+		break;
+	default:
+		dev_err(codec->dev, "unsupported width %d\n",
+			params_width(params));
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+#define CALC_OSCSET(rate, refclk) ( \
+	((((rate * 10000) / refclk) * 4096) + 7000) / 10000)
+#define CALC_RATIOSET(rate, refclk) ( \
+	((((refclk  * 100000) / rate) * 16384) + 50000) / 100000)
+
+/*
+ * tlv320dac33 is strict on the sequence of the register writes, if the register
+ * writes happens in different order, than dac33 might end up in unknown state.
+ * Use the known, working sequence of register writes to initialize the dac33.
+ */
+static int dac33_prepare_chip(struct snd_pcm_substream *substream,
+			      struct snd_soc_codec *codec)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	unsigned int oscset, ratioset, pwr_ctrl, reg_tmp;
+	u8 aictrl_a, aictrl_b, fifoctrl_a;
+
+	switch (substream->runtime->rate) {
+	case 44100:
+	case 48000:
+		oscset = CALC_OSCSET(substream->runtime->rate, dac33->refclk);
+		ratioset = CALC_RATIOSET(substream->runtime->rate,
+					 dac33->refclk);
+		break;
+	default:
+		dev_err(codec->dev, "unsupported rate %d\n",
+			substream->runtime->rate);
+		return -EINVAL;
+	}
+
+
+	aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
+	aictrl_a &= ~(DAC33_NCYCL_MASK | DAC33_WLEN_MASK);
+	/* Read FIFO control A, and clear FIFO flush bit */
+	fifoctrl_a = dac33_read_reg_cache(codec, DAC33_FIFO_CTRL_A);
+	fifoctrl_a &= ~DAC33_FIFOFLUSH;
+
+	fifoctrl_a &= ~DAC33_WIDTH;
+	switch (substream->runtime->format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		aictrl_a |= (DAC33_NCYCL_16 | DAC33_WLEN_16);
+		fifoctrl_a |= DAC33_WIDTH;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		aictrl_a |= (DAC33_NCYCL_32 | DAC33_WLEN_24);
+		break;
+	default:
+		dev_err(codec->dev, "unsupported format %d\n",
+			substream->runtime->format);
+		return -EINVAL;
+	}
+
+	mutex_lock(&dac33->mutex);
+
+	if (!dac33->chip_power) {
+		/*
+		 * Chip is not powered yet.
+		 * Do the init in the dac33_set_bias_level later.
+		 */
+		mutex_unlock(&dac33->mutex);
+		return 0;
+	}
+
+	dac33_soft_power(codec, 0);
+	dac33_soft_power(codec, 1);
+
+	reg_tmp = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
+	dac33_write(codec, DAC33_INT_OSC_CTRL, reg_tmp);
+
+	/* Write registers 0x08 and 0x09 (MSB, LSB) */
+	dac33_write16(codec, DAC33_INT_OSC_FREQ_RAT_A, oscset);
+
+	/* OSC calibration time */
+	dac33_write(codec, DAC33_CALIB_TIME, 96);
+
+	/* adjustment treshold & step */
+	dac33_write(codec, DAC33_INT_OSC_CTRL_B, DAC33_ADJTHRSHLD(2) |
+						 DAC33_ADJSTEP(1));
+
+	/* div=4 / gain=1 / div */
+	dac33_write(codec, DAC33_INT_OSC_CTRL_C, DAC33_REFDIV(4));
+
+	pwr_ctrl = dac33_read_reg_cache(codec, DAC33_PWR_CTRL);
+	pwr_ctrl |= DAC33_OSCPDNB | DAC33_DACRPDNB | DAC33_DACLPDNB;
+	dac33_write(codec, DAC33_PWR_CTRL, pwr_ctrl);
+
+	dac33_oscwait(codec);
+
+	if (dac33->fifo_mode) {
+		/* Generic for all FIFO modes */
+		/* 50-51 : ASRC Control registers */
+		dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCLKDIV(1));
+		dac33_write(codec, DAC33_ASRC_CTRL_B, 1); /* ??? */
+
+		/* Write registers 0x34 and 0x35 (MSB, LSB) */
+		dac33_write16(codec, DAC33_SRC_REF_CLK_RATIO_A, ratioset);
+
+		/* Set interrupts to high active */
+		dac33_write(codec, DAC33_INTP_CTRL_A, DAC33_INTPM_AHIGH);
+	} else {
+		/* FIFO bypass mode */
+		/* 50-51 : ASRC Control registers */
+		dac33_write(codec, DAC33_ASRC_CTRL_A, DAC33_SRCBYP);
+		dac33_write(codec, DAC33_ASRC_CTRL_B, 0); /* ??? */
+	}
+
+	/* Interrupt behaviour configuration */
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		dac33_write(codec, DAC33_FIFO_IRQ_MODE_B,
+			    DAC33_ATM(DAC33_FIFO_IRQ_MODE_LEVEL));
+		break;
+	case DAC33_FIFO_MODE7:
+		dac33_write(codec, DAC33_FIFO_IRQ_MODE_A,
+			DAC33_UTM(DAC33_FIFO_IRQ_MODE_LEVEL));
+		break;
+	default:
+		/* in FIFO bypass mode, the interrupts are not used */
+		break;
+	}
+
+	aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		/*
+		 * For mode1:
+		 * Disable the FIFO bypass (Enable the use of FIFO)
+		 * Select nSample mode
+		 * BCLK is only running when data is needed by DAC33
+		 */
+		fifoctrl_a &= ~DAC33_FBYPAS;
+		fifoctrl_a &= ~DAC33_FAUTO;
+		if (dac33->keep_bclk)
+			aictrl_b |= DAC33_BCLKON;
+		else
+			aictrl_b &= ~DAC33_BCLKON;
+		break;
+	case DAC33_FIFO_MODE7:
+		/*
+		 * For mode1:
+		 * Disable the FIFO bypass (Enable the use of FIFO)
+		 * Select Threshold mode
+		 * BCLK is only running when data is needed by DAC33
+		 */
+		fifoctrl_a &= ~DAC33_FBYPAS;
+		fifoctrl_a |= DAC33_FAUTO;
+		if (dac33->keep_bclk)
+			aictrl_b |= DAC33_BCLKON;
+		else
+			aictrl_b &= ~DAC33_BCLKON;
+		break;
+	default:
+		/*
+		 * For FIFO bypass mode:
+		 * Enable the FIFO bypass (Disable the FIFO use)
+		 * Set the BCLK as continuous
+		 */
+		fifoctrl_a |= DAC33_FBYPAS;
+		aictrl_b |= DAC33_BCLKON;
+		break;
+	}
+
+	dac33_write(codec, DAC33_FIFO_CTRL_A, fifoctrl_a);
+	dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
+	dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
+
+	/*
+	 * BCLK divide ratio
+	 * 0: 1.5
+	 * 1: 1
+	 * 2: 2
+	 * ...
+	 * 254: 254
+	 * 255: 255
+	 */
+	if (dac33->fifo_mode)
+		dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C,
+							dac33->burst_bclkdiv);
+	else
+		if (substream->runtime->format == SNDRV_PCM_FORMAT_S16_LE)
+			dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 32);
+		else
+			dac33_write(codec, DAC33_SER_AUDIOIF_CTRL_C, 16);
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		dac33_write16(codec, DAC33_ATHR_MSB,
+			      DAC33_THRREG(dac33->alarm_threshold));
+		break;
+	case DAC33_FIFO_MODE7:
+		/*
+		 * Configure the threshold levels, and leave 10 sample space
+		 * at the bottom, and also at the top of the FIFO
+		 */
+		dac33_write16(codec, DAC33_UTHR_MSB, DAC33_THRREG(dac33->uthr));
+		dac33_write16(codec, DAC33_LTHR_MSB,
+			      DAC33_THRREG(DAC33_MODE7_MARGIN));
+		break;
+	default:
+		break;
+	}
+
+	mutex_unlock(&dac33->mutex);
+
+	return 0;
+}
+
+static void dac33_calculate_times(struct snd_pcm_substream *substream,
+				  struct snd_soc_codec *codec)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	unsigned int period_size = substream->runtime->period_size;
+	unsigned int rate = substream->runtime->rate;
+	unsigned int nsample_limit;
+
+	/* In bypass mode we don't need to calculate */
+	if (!dac33->fifo_mode)
+		return;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_MODE1:
+		/* Number of samples under i2c latency */
+		dac33->alarm_threshold = US_TO_SAMPLES(rate,
+						dac33->mode1_latency);
+		nsample_limit = dac33->fifo_size - dac33->alarm_threshold;
+
+		if (period_size <= dac33->alarm_threshold)
+			/*
+			 * Configure nSamaple to number of periods,
+			 * which covers the latency requironment.
+			 */
+			dac33->nsample = period_size *
+				((dac33->alarm_threshold / period_size) +
+				(dac33->alarm_threshold % period_size ?
+				1 : 0));
+		else if (period_size > nsample_limit)
+			dac33->nsample = nsample_limit;
+		else
+			dac33->nsample = period_size;
+
+		dac33->mode1_us_burst = SAMPLES_TO_US(dac33->burst_rate,
+						      dac33->nsample);
+		dac33->t_stamp1 = 0;
+		dac33->t_stamp2 = 0;
+		break;
+	case DAC33_FIFO_MODE7:
+		dac33->uthr = UTHR_FROM_PERIOD_SIZE(period_size, rate,
+						    dac33->burst_rate) + 9;
+		if (dac33->uthr > (dac33->fifo_size - DAC33_MODE7_MARGIN))
+			dac33->uthr = dac33->fifo_size - DAC33_MODE7_MARGIN;
+		if (dac33->uthr < (DAC33_MODE7_MARGIN + 10))
+			dac33->uthr = (DAC33_MODE7_MARGIN + 10);
+
+		dac33->mode7_us_to_lthr =
+				SAMPLES_TO_US(substream->runtime->rate,
+					dac33->uthr - DAC33_MODE7_MARGIN + 1);
+		dac33->t_stamp1 = 0;
+		break;
+	default:
+		break;
+	}
+
+}
+
+static int dac33_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
+			     struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (dac33->fifo_mode) {
+			dac33->state = DAC33_PREFILL;
+			queue_work(dac33->dac33_wq, &dac33->work);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		if (dac33->fifo_mode) {
+			dac33->state = DAC33_FLUSH;
+			queue_work(dac33->dac33_wq, &dac33->work);
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static snd_pcm_sframes_t dac33_dai_delay(
+			struct snd_pcm_substream *substream,
+			struct snd_soc_dai *dai)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	unsigned long long t0, t1, t_now;
+	unsigned int time_delta, uthr;
+	int samples_out, samples_in, samples;
+	snd_pcm_sframes_t delay = 0;
+	unsigned long flags;
+
+	switch (dac33->fifo_mode) {
+	case DAC33_FIFO_BYPASS:
+		break;
+	case DAC33_FIFO_MODE1:
+		spin_lock_irqsave(&dac33->lock, flags);
+		t0 = dac33->t_stamp1;
+		t1 = dac33->t_stamp2;
+		spin_unlock_irqrestore(&dac33->lock, flags);
+		t_now = ktime_to_us(ktime_get());
+
+		/* We have not started to fill the FIFO yet, delay is 0 */
+		if (!t1)
+			goto out;
+
+		if (t0 > t1) {
+			/*
+			 * Phase 1:
+			 * After Alarm threshold, and before nSample write
+			 */
+			time_delta = t_now - t0;
+			samples_out = time_delta ? US_TO_SAMPLES(
+						substream->runtime->rate,
+						time_delta) : 0;
+
+			if (likely(dac33->alarm_threshold > samples_out))
+				delay = dac33->alarm_threshold - samples_out;
+			else
+				delay = 0;
+		} else if ((t_now - t1) <= dac33->mode1_us_burst) {
+			/*
+			 * Phase 2:
+			 * After nSample write (during burst operation)
+			 */
+			time_delta = t_now - t0;
+			samples_out = time_delta ? US_TO_SAMPLES(
+						substream->runtime->rate,
+						time_delta) : 0;
+
+			time_delta = t_now - t1;
+			samples_in = time_delta ? US_TO_SAMPLES(
+						dac33->burst_rate,
+						time_delta) : 0;
+
+			samples = dac33->alarm_threshold;
+			samples += (samples_in - samples_out);
+
+			if (likely(samples > 0))
+				delay = samples;
+			else
+				delay = 0;
+		} else {
+			/*
+			 * Phase 3:
+			 * After burst operation, before next alarm threshold
+			 */
+			time_delta = t_now - t0;
+			samples_out = time_delta ? US_TO_SAMPLES(
+						substream->runtime->rate,
+						time_delta) : 0;
+
+			samples_in = dac33->nsample;
+			samples = dac33->alarm_threshold;
+			samples += (samples_in - samples_out);
+
+			if (likely(samples > 0))
+				delay = samples > dac33->fifo_size ?
+					dac33->fifo_size : samples;
+			else
+				delay = 0;
+		}
+		break;
+	case DAC33_FIFO_MODE7:
+		spin_lock_irqsave(&dac33->lock, flags);
+		t0 = dac33->t_stamp1;
+		uthr = dac33->uthr;
+		spin_unlock_irqrestore(&dac33->lock, flags);
+		t_now = ktime_to_us(ktime_get());
+
+		/* We have not started to fill the FIFO yet, delay is 0 */
+		if (!t0)
+			goto out;
+
+		if (t_now <= t0) {
+			/*
+			 * Either the timestamps are messed or equal. Report
+			 * maximum delay
+			 */
+			delay = uthr;
+			goto out;
+		}
+
+		time_delta = t_now - t0;
+		if (time_delta <= dac33->mode7_us_to_lthr) {
+			/*
+			* Phase 1:
+			* After burst (draining phase)
+			*/
+			samples_out = US_TO_SAMPLES(
+					substream->runtime->rate,
+					time_delta);
+
+			if (likely(uthr > samples_out))
+				delay = uthr - samples_out;
+			else
+				delay = 0;
+		} else {
+			/*
+			* Phase 2:
+			* During burst operation
+			*/
+			time_delta = time_delta - dac33->mode7_us_to_lthr;
+
+			samples_out = US_TO_SAMPLES(
+					substream->runtime->rate,
+					time_delta);
+			samples_in = US_TO_SAMPLES(
+					dac33->burst_rate,
+					time_delta);
+			delay = DAC33_MODE7_MARGIN + samples_in - samples_out;
+
+			if (unlikely(delay > uthr))
+				delay = uthr;
+		}
+		break;
+	default:
+		dev_warn(codec->dev, "Unhandled FIFO mode: %d\n",
+							dac33->fifo_mode);
+		break;
+	}
+out:
+	return delay;
+}
+
+static int dac33_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 tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 ioc_reg, asrcb_reg;
+
+	ioc_reg = dac33_read_reg_cache(codec, DAC33_INT_OSC_CTRL);
+	asrcb_reg = dac33_read_reg_cache(codec, DAC33_ASRC_CTRL_B);
+	switch (clk_id) {
+	case TLV320DAC33_MCLK:
+		ioc_reg |= DAC33_REFSEL;
+		asrcb_reg |= DAC33_SRCREFSEL;
+		break;
+	case TLV320DAC33_SLEEPCLK:
+		ioc_reg &= ~DAC33_REFSEL;
+		asrcb_reg &= ~DAC33_SRCREFSEL;
+		break;
+	default:
+		dev_err(codec->dev, "Invalid clock ID (%d)\n", clk_id);
+		break;
+	}
+	dac33->refclk = freq;
+
+	dac33_write_reg_cache(codec, DAC33_INT_OSC_CTRL, ioc_reg);
+	dac33_write_reg_cache(codec, DAC33_ASRC_CTRL_B, asrcb_reg);
+
+	return 0;
+}
+
+static int dac33_set_dai_fmt(struct snd_soc_dai *codec_dai,
+			     unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	u8 aictrl_a, aictrl_b;
+
+	aictrl_a = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A);
+	aictrl_b = dac33_read_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B);
+	/* set master/slave audio interface */
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		/* Codec Master */
+		aictrl_a |= (DAC33_MSBCLK | DAC33_MSWCLK);
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		/* Codec Slave */
+		if (dac33->fifo_mode) {
+			dev_err(codec->dev, "FIFO mode requires master mode\n");
+			return -EINVAL;
+		} else
+			aictrl_a &= ~(DAC33_MSBCLK | DAC33_MSWCLK);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	aictrl_a &= ~DAC33_AFMT_MASK;
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		aictrl_a |= DAC33_AFMT_I2S;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		aictrl_a |= DAC33_AFMT_DSP;
+		aictrl_b &= ~DAC33_DATA_DELAY_MASK;
+		aictrl_b |= DAC33_DATA_DELAY(0);
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		aictrl_a |= DAC33_AFMT_RIGHT_J;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		aictrl_a |= DAC33_AFMT_LEFT_J;
+		break;
+	default:
+		dev_err(codec->dev, "Unsupported format (%u)\n",
+			fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+		return -EINVAL;
+	}
+
+	dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_A, aictrl_a);
+	dac33_write_reg_cache(codec, DAC33_SER_AUDIOIF_CTRL_B, aictrl_b);
+
+	return 0;
+}
+
+static int dac33_soc_probe(struct snd_soc_codec *codec)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+	int ret = 0;
+
+	codec->control_data = dac33->control_data;
+	codec->hw_write = (hw_write_t) i2c_master_send;
+	dac33->codec = codec;
+
+	/* Read the tlv320dac33 ID registers */
+	ret = dac33_hard_power(codec, 1);
+	if (ret != 0) {
+		dev_err(codec->dev, "Failed to power up codec: %d\n", ret);
+		goto err_power;
+	}
+	ret = dac33_read_id(codec);
+	dac33_hard_power(codec, 0);
+
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to read chip ID: %d\n", ret);
+		ret = -ENODEV;
+		goto err_power;
+	}
+
+	/* Check if the IRQ number is valid and request it */
+	if (dac33->irq >= 0) {
+		ret = request_irq(dac33->irq, dac33_interrupt_handler,
+				  IRQF_TRIGGER_RISING,
+				  codec->component.name, codec);
+		if (ret < 0) {
+			dev_err(codec->dev, "Could not request IRQ%d (%d)\n",
+						dac33->irq, ret);
+			dac33->irq = -1;
+		}
+		if (dac33->irq != -1) {
+			/* Setup work queue */
+			dac33->dac33_wq =
+				create_singlethread_workqueue("tlv320dac33");
+			if (dac33->dac33_wq == NULL) {
+				free_irq(dac33->irq, codec);
+				return -ENOMEM;
+			}
+
+			INIT_WORK(&dac33->work, dac33_work);
+		}
+	}
+
+	/* Only add the FIFO controls, if we have valid IRQ number */
+	if (dac33->irq >= 0)
+		snd_soc_add_codec_controls(codec, dac33_mode_snd_controls,
+				     ARRAY_SIZE(dac33_mode_snd_controls));
+
+err_power:
+	return ret;
+}
+
+static int dac33_soc_remove(struct snd_soc_codec *codec)
+{
+	struct tlv320dac33_priv *dac33 = snd_soc_codec_get_drvdata(codec);
+
+	if (dac33->irq >= 0) {
+		free_irq(dac33->irq, dac33->codec);
+		destroy_workqueue(dac33->dac33_wq);
+	}
+	return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_tlv320dac33 = {
+	.read = dac33_read_reg_cache,
+	.write = dac33_write_locked,
+	.set_bias_level = dac33_set_bias_level,
+	.idle_bias_off = true,
+	.reg_cache_size = ARRAY_SIZE(dac33_reg),
+	.reg_word_size = sizeof(u8),
+	.reg_cache_default = dac33_reg,
+	.probe = dac33_soc_probe,
+	.remove = dac33_soc_remove,
+
+	.controls = dac33_snd_controls,
+	.num_controls = ARRAY_SIZE(dac33_snd_controls),
+	.dapm_widgets = dac33_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(dac33_dapm_widgets),
+	.dapm_routes = audio_map,
+	.num_dapm_routes = ARRAY_SIZE(audio_map),
+};
+
+#define DAC33_RATES	(SNDRV_PCM_RATE_44100 | \
+			 SNDRV_PCM_RATE_48000)
+#define DAC33_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops dac33_dai_ops = {
+	.startup	= dac33_startup,
+	.shutdown	= dac33_shutdown,
+	.hw_params	= dac33_hw_params,
+	.trigger	= dac33_pcm_trigger,
+	.delay		= dac33_dai_delay,
+	.set_sysclk	= dac33_set_dai_sysclk,
+	.set_fmt	= dac33_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver dac33_dai = {
+	.name = "tlv320dac33-hifi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = DAC33_RATES,
+		.formats = DAC33_FORMATS,
+		.sig_bits = 24,
+	},
+	.ops = &dac33_dai_ops,
+};
+
+static int dac33_i2c_probe(struct i2c_client *client,
+			   const struct i2c_device_id *id)
+{
+	struct tlv320dac33_platform_data *pdata;
+	struct tlv320dac33_priv *dac33;
+	int ret, i;
+
+	if (client->dev.platform_data == NULL) {
+		dev_err(&client->dev, "Platform data not set\n");
+		return -ENODEV;
+	}
+	pdata = client->dev.platform_data;
+
+	dac33 = devm_kzalloc(&client->dev, sizeof(struct tlv320dac33_priv),
+			     GFP_KERNEL);
+	if (dac33 == NULL)
+		return -ENOMEM;
+
+	dac33->control_data = client;
+	mutex_init(&dac33->mutex);
+	spin_lock_init(&dac33->lock);
+
+	i2c_set_clientdata(client, dac33);
+
+	dac33->power_gpio = pdata->power_gpio;
+	dac33->burst_bclkdiv = pdata->burst_bclkdiv;
+	dac33->keep_bclk = pdata->keep_bclk;
+	dac33->mode1_latency = pdata->mode1_latency;
+	if (!dac33->mode1_latency)
+		dac33->mode1_latency = 10000; /* 10ms */
+	dac33->irq = client->irq;
+	/* Disable FIFO use by default */
+	dac33->fifo_mode = DAC33_FIFO_BYPASS;
+
+	/* Check if the reset GPIO number is valid and request it */
+	if (dac33->power_gpio >= 0) {
+		ret = gpio_request(dac33->power_gpio, "tlv320dac33 reset");
+		if (ret < 0) {
+			dev_err(&client->dev,
+				"Failed to request reset GPIO (%d)\n",
+				dac33->power_gpio);
+			goto err_gpio;
+		}
+		gpio_direction_output(dac33->power_gpio, 0);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(dac33->supplies); i++)
+		dac33->supplies[i].supply = dac33_supply_names[i];
+
+	ret = devm_regulator_bulk_get(&client->dev, ARRAY_SIZE(dac33->supplies),
+				 dac33->supplies);
+
+	if (ret != 0) {
+		dev_err(&client->dev, "Failed to request supplies: %d\n", ret);
+		goto err_get;
+	}
+
+	ret = snd_soc_register_codec(&client->dev,
+			&soc_codec_dev_tlv320dac33, &dac33_dai, 1);
+	if (ret < 0)
+		goto err_get;
+
+	return ret;
+err_get:
+	if (dac33->power_gpio >= 0)
+		gpio_free(dac33->power_gpio);
+err_gpio:
+	return ret;
+}
+
+static int dac33_i2c_remove(struct i2c_client *client)
+{
+	struct tlv320dac33_priv *dac33 = i2c_get_clientdata(client);
+
+	if (unlikely(dac33->chip_power))
+		dac33_hard_power(dac33->codec, 0);
+
+	if (dac33->power_gpio >= 0)
+		gpio_free(dac33->power_gpio);
+
+	snd_soc_unregister_codec(&client->dev);
+	return 0;
+}
+
+static const struct i2c_device_id tlv320dac33_i2c_id[] = {
+	{
+		.name = "tlv320dac33",
+		.driver_data = 0,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(i2c, tlv320dac33_i2c_id);
+
+static struct i2c_driver tlv320dac33_i2c_driver = {
+	.driver = {
+		.name = "tlv320dac33-codec",
+		.owner = THIS_MODULE,
+	},
+	.probe		= dac33_i2c_probe,
+	.remove		= dac33_i2c_remove,
+	.id_table	= tlv320dac33_i2c_id,
+};
+
+module_i2c_driver(tlv320dac33_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC TLV320DAC33 codec driver");
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_LICENSE("GPL");