path: root/packages/linux/linux-omap2-git/beagleboard/ASoC-TWL4030-codec-driver.patch

From: Steve Sakoman <steve@sakoman.com>
Date: Fri, 18 Jul 2008 16:41:27 +0000 (-0700)
Subject: ASoC TWL4030 codec driver
X-Git-Url: http://www.sakoman.net/cgi-bin/gitweb.cgi?p=linux-omap-2.6.git;a=commitdiff_plain;h=67b73de03016cc31b1f91af93c57b8e749c13520;hp=d3b3ae0fe6c71641da19c8de466ec366d39847e3

ASoC TWL4030 codec driver

Basic audio support for the TWL4030

Signed-off-by: Steve Sakoman <steve@sakoman.com>
---

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 3903ab7..468536d 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -44,3 +44,7 @@ config SND_SOC_CS4270_VD33_ERRATA
 config SND_SOC_TLV320AIC3X
 	tristate
 	depends on SND_SOC && I2C
+
+config SND_SOC_TWL4030
+	tristate
+	depends on SND_SOC && I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 4e1314c..d2c0b12 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -6,6 +6,7 @@ snd-soc-wm9712-objs := wm9712.o
 snd-soc-wm9713-objs := wm9713.o
 snd-soc-cs4270-objs := cs4270.o
 snd-soc-tlv320aic3x-objs := tlv320aic3x.o
+snd-soc-twl4030-objs := twl4030.o
 
 obj-$(CONFIG_SND_SOC_AC97_CODEC)	+= snd-soc-ac97.o
 obj-$(CONFIG_SND_SOC_WM8731)	+= snd-soc-wm8731.o
@@ -15,3 +16,4 @@ obj-$(CONFIG_SND_SOC_WM9712)	+= snd-soc-wm9712.o
 obj-$(CONFIG_SND_SOC_WM9713)	+= snd-soc-wm9713.o
 obj-$(CONFIG_SND_SOC_CS4270)	+= snd-soc-cs4270.o
 obj-$(CONFIG_SND_SOC_TLV320AIC3X)	+= snd-soc-tlv320aic3x.o
+obj-$(CONFIG_SND_SOC_TWL4030)	+= snd-soc-twl4030.o
diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
new file mode 100644
index 0000000..25a154c
--- /dev/null
+++ b/sound/soc/codecs/twl4030.c
@@ -0,0 +1,626 @@
+/*
+ * ALSA SoC TWL4030 codec driver
+ *
+ * Author:      Steve Sakoman, <steve@sakoman.com>
+ *
+ * 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.
+ */
+
+#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/platform_device.h>
+#include <linux/i2c/twl4030.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/initval.h>
+
+#include "twl4030.h"
+
+/*
+ * twl4030 register cache & default register settings
+ */
+static const u8 twl4030_reg[TWL4030_CACHEREGNUM] = {
+	0x00, /* this register not used		*/
+	0x93, /* REG_CODEC_MODE		(0x1)	*/
+	0xc3, /* REG_OPTION		(0x2)	*/
+	0x00, /* REG_UNKNOWN		(0x3)	*/
+	0x00, /* REG_MICBIAS_CTL	(0x4)	*/
+	0x34, /* REG_ANAMICL		(0x5)	*/
+	0x14, /* REG_ANAMICR		(0x6)	*/
+	0x0a, /* REG_AVADC_CTL		(0x7)	*/
+	0x00, /* REG_ADCMICSEL		(0x8)	*/
+	0x00, /* REG_DIGMIXING		(0x9)	*/
+	0x0c, /* REG_ATXL1PGA		(0xA)	*/
+	0x0c, /* REG_ATXR1PGA		(0xB)	*/
+	0x00, /* REG_AVTXL2PGA		(0xC)	*/
+	0x00, /* REG_AVTXR2PGA		(0xD)	*/
+	0x01, /* REG_AUDIO_IF		(0xE)	*/
+	0x00, /* REG_VOICE_IF		(0xF)	*/
+	0x00, /* REG_ARXR1PGA		(0x10)	*/
+	0x00, /* REG_ARXL1PGA		(0x11)	*/
+	0x6c, /* REG_ARXR2PGA		(0x12)	*/
+	0x6c, /* REG_ARXL2PGA		(0x13)	*/
+	0x00, /* REG_VRXPGA		(0x14)	*/
+	0x00, /* REG_VSTPGA		(0x15)	*/
+	0x00, /* REG_VRX2ARXPGA		(0x16)	*/
+	0x0c, /* REG_AVDAC_CTL		(0x17)	*/
+	0x00, /* REG_ARX2VTXPGA		(0x18)	*/
+	0x00, /* REG_ARXL1_APGA_CTL	(0x19)	*/
+	0x00, /* REG_ARXR1_APGA_CTL	(0x1A)	*/
+	0x4b, /* REG_ARXL2_APGA_CTL	(0x1B)	*/
+	0x4b, /* REG_ARXR2_APGA_CTL	(0x1C)	*/
+	0x00, /* REG_ATX2ARXPGA		(0x1D)	*/
+	0x00, /* REG_BT_IF		(0x1E)	*/
+	0x00, /* REG_BTPGA		(0x1F)	*/
+	0x00, /* REG_BTSTPGA		(0x20)	*/
+	0x00, /* REG_EAR_CTL		(0x21)	*/
+	0x24, /* REG_HS_SEL		(0x22)	*/
+	0x0a, /* REG_HS_GAIN_SET	(0x23)	*/
+	0x00, /* REG_HS_POPN_SET	(0x24)	*/
+	0x00, /* REG_PREDL_CTL		(0x25)	*/
+	0x00, /* REG_PREDR_CTL		(0x26)	*/
+	0x00, /* REG_PRECKL_CTL		(0x27)	*/
+	0x00, /* REG_PRECKR_CTL		(0x28)	*/
+	0x00, /* REG_HFL_CTL		(0x29)	*/
+	0x00, /* REG_HFR_CTL		(0x2A)	*/
+	0x00, /* REG_ALC_CTL		(0x2B)	*/
+	0x00, /* REG_ALC_SET1		(0x2C)	*/
+	0x00, /* REG_ALC_SET2		(0x2D)	*/
+	0x00, /* REG_BOOST_CTL		(0x2E)	*/
+	0x01, /* REG_SOFTVOL_CTL	(0x2F)	*/
+	0x00, /* REG_DTMF_FREQSEL	(0x30)	*/
+	0x00, /* REG_DTMF_TONEXT1H	(0x31)	*/
+	0x00, /* REG_DTMF_TONEXT1L	(0x32)	*/
+	0x00, /* REG_DTMF_TONEXT2H	(0x33)	*/
+	0x00, /* REG_DTMF_TONEXT2L	(0x34)	*/
+	0x00, /* REG_DTMF_TONOFF	(0x35)	*/
+	0x00, /* REG_DTMF_WANONOFF	(0x36)	*/
+	0x00, /* REG_I2S_RX_SCRAMBLE_H	(0x37)	*/
+	0x00, /* REG_I2S_RX_SCRAMBLE_M	(0x38)	*/
+	0x00, /* REG_I2S_RX_SCRAMBLE_L	(0x39)	*/
+	0x16, /* REG_APLL_CTL		(0x3A)	*/
+	0x00, /* REG_DTMF_CTL		(0x3B)	*/
+	0x00, /* REG_DTMF_PGA_CTL2	(0x3C)	*/
+	0x00, /* REG_DTMF_PGA_CTL1	(0x3D)	*/
+	0x00, /* REG_MISC_SET_1		(0x3E)	*/
+	0x00, /* REG_PCMBTMUX		(0x3F)	*/
+	0x00, /* not used		(0x40)	*/
+	0x00, /* not used		(0x41)	*/
+	0x00, /* not used		(0x42)	*/
+	0x00, /* REG_RX_PATH_SEL	(0x43)	*/
+	0x00, /* REG_VDL_APGA_CTL	(0x44)	*/
+	0x00, /* REG_VIBRA_CTL		(0x45)	*/
+	0x00, /* REG_VIBRA_SET		(0x46)	*/
+	0x00, /* REG_VIBRA_PWM_SET	(0x47)	*/
+	0x00, /* REG_ANAMIC_GAIN	(0x48)	*/
+	0x00, /* REG_MISC_SET_2		(0x49)	*/
+};
+
+static void twl4030_dump_registers(void)
+{
+	int i = 0;
+	u8 data;
+
+	printk(KERN_INFO "TWL 4030 Register dump for Audio Module\n");
+
+	for (i = REG_CODEC_MODE; i <= REG_MISC_SET_2; i++) {
+		twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &data, i);
+		printk(KERN_INFO "Register[0x%02x]=0x%02x\n", i, data);
+	}
+}
+
+struct twl4030_priv {
+	unsigned int dummy;
+};
+
+/*
+ * read twl4030 register cache
+ */
+static inline unsigned int twl4030_read_reg_cache(struct snd_soc_codec *codec,
+	unsigned int reg)
+{
+	u8 *cache = codec->reg_cache;
+
+	return cache[reg];
+}
+
+/*
+ * write twl4030 register cache
+ */
+static inline void twl4030_write_reg_cache(struct snd_soc_codec *codec,
+						u8 reg, u8 value)
+{
+	u8 *cache = codec->reg_cache;
+
+	if (reg >= TWL4030_CACHEREGNUM)
+		return;
+	cache[reg] = value;
+}
+
+/*
+ * write to the twl4030 register space
+ */
+static int twl4030_write(struct snd_soc_codec *codec,
+			unsigned int reg, unsigned int value)
+{
+	twl4030_write_reg_cache(codec, reg, value);
+	return twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, value, reg);
+}
+
+static void twl4030_init_chip(void)
+{
+	unsigned char byte;
+	int i;
+
+	twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+		twl4030_reg[REG_CODEC_MODE] & 0xfd, REG_CODEC_MODE);
+
+	udelay(10); /* delay for power settling */
+
+	for (i = REG_OPTION; i <= REG_MISC_SET_2; i++)
+		twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+					twl4030_reg[i], i);
+
+	twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+		twl4030_reg[REG_CODEC_MODE], REG_CODEC_MODE);
+
+	udelay(10); /* delay for power settling */
+
+	/* initiate offset cancellation */
+	twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+		twl4030_reg[REG_ANAMICL] | 0x80, REG_ANAMICL);
+
+	/* wait for offset cancellation to complete */
+	twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &byte, REG_ANAMICL);
+	while ((byte & 0x80) == 0x80)
+		twl4030_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE,
+					&byte, REG_ANAMICL);
+
+	twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+		twl4030_reg[REG_MISC_SET_1] | 0x02, REG_MISC_SET_1);
+
+}
+
+static const struct snd_kcontrol_new twl4030_snd_controls[] = {
+	SOC_DOUBLE_R("Master Playback Volume",
+		 REG_ARXL2PGA, REG_ARXR2PGA,
+		0, 127, 0),
+	SOC_DOUBLE_R("Capture Volume",
+		 REG_ATXL1PGA, REG_ATXR1PGA,
+		0, 127, 0),
+};
+
+/* add non dapm controls */
+static int twl4030_add_controls(struct snd_soc_codec *codec)
+{
+	int err, i;
+
+	for (i = 0; i < ARRAY_SIZE(twl4030_snd_controls); i++) {
+		err = snd_ctl_add(codec->card,
+				  snd_soc_cnew(&twl4030_snd_controls[i],
+						codec, NULL));
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget twl4030_dapm_widgets[] = {
+	SND_SOC_DAPM_INPUT("INL"),
+	SND_SOC_DAPM_INPUT("INR"),
+
+	SND_SOC_DAPM_OUTPUT("OUTL"),
+	SND_SOC_DAPM_OUTPUT("OUTR"),
+
+	SND_SOC_DAPM_DAC("DACL", "Left Playback", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_DAC("DACR", "Right Playback", SND_SOC_NOPM, 0, 0),
+
+	SND_SOC_DAPM_ADC("ADCL", "Left Capture", SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_ADC("ADCR", "Right Capture", SND_SOC_NOPM, 0, 0),
+};
+
+static const char *intercon[][3] = {
+	/* outputs */
+	{"OUTL", NULL, "DACL"},
+	{"OUTR", NULL, "DACR"},
+
+	/* inputs */
+	{"ADCL", NULL, "INL"},
+	{"ADCR", NULL, "INR"},
+
+	/* terminator */
+	{NULL, NULL, NULL},
+};
+
+static int twl4030_add_widgets(struct snd_soc_codec *codec)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(twl4030_dapm_widgets); i++)
+		snd_soc_dapm_new_control(codec, &twl4030_dapm_widgets[i]);
+
+	/* set up audio path interconnects */
+	for (i = 0; intercon[i][0] != NULL; i++)
+		snd_soc_dapm_connect_input(codec, intercon[i][0],
+			intercon[i][1], intercon[i][2]);
+
+	snd_soc_dapm_new_widgets(codec);
+	return 0;
+}
+
+static int twl4030_dapm_event(struct snd_soc_codec *codec, int event)
+{
+
+	printk(KERN_INFO "TWL4030 Audio Codec dapm event\n");
+	switch (event) {
+	case SNDRV_CTL_POWER_D0: /* full On */
+		break;
+	case SNDRV_CTL_POWER_D1: /* partial On */
+	case SNDRV_CTL_POWER_D2: /* partial On */
+		break;
+	case SNDRV_CTL_POWER_D3hot: /* off, with power */
+		break;
+	case SNDRV_CTL_POWER_D3cold: /* off, without power */
+		break;
+	}
+	codec->dapm_state = event;
+
+	return 0;
+}
+
+static void twl4030_power_up(struct snd_soc_codec *codec, u8 mode)
+{
+	u8 popn, hsgain;
+
+	twl4030_write(codec, REG_CODEC_MODE, mode & ~CODECPDZ);
+	twl4030_write(codec, REG_CODEC_MODE, mode | CODECPDZ);
+	udelay(10);
+
+	popn = twl4030_read_reg_cache(codec, REG_HS_POPN_SET);
+	popn &= RAMP_DELAY;
+	popn |=	VMID_EN | RAMP_DELAY_161MS;
+	twl4030_write(codec, REG_HS_POPN_SET, popn);
+
+	hsgain = HSR_GAIN_0DB | HSL_GAIN_0DB;
+	twl4030_write(codec, REG_HS_GAIN_SET, hsgain);
+
+	popn |= RAMP_EN;
+	twl4030_write(codec, REG_HS_POPN_SET, popn);
+}
+
+static void twl4030_power_down(struct snd_soc_codec *codec)
+{
+	u8 popn, hsgain, mode;
+
+	popn = twl4030_read_reg_cache(codec, REG_HS_POPN_SET);
+	popn &= ~RAMP_EN;
+	twl4030_write(codec, REG_HS_POPN_SET, popn);
+
+	hsgain = HSR_GAIN_PWR_DOWN | HSL_GAIN_PWR_DOWN;
+	twl4030_write(codec, REG_HS_GAIN_SET, hsgain);
+
+	popn &= ~VMID_EN;
+	twl4030_write(codec, REG_HS_POPN_SET, popn);
+
+	mode = twl4030_read_reg_cache(codec, REG_CODEC_MODE);
+	mode &= ~CODECPDZ;
+	twl4030_write(codec, REG_CODEC_MODE, mode);
+	udelay(10);
+}
+
+
+static int twl4030_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_device *socdev = rtd->socdev;
+	struct snd_soc_codec *codec = socdev->codec;
+	struct twl4030_priv *twl4030 = codec->private_data;
+	u8 mode, old_mode, format, old_format;
+
+
+	/* bit rate */
+	old_mode = twl4030_read_reg_cache(codec, REG_CODEC_MODE) & ~CODECPDZ;
+	mode = old_mode;
+	mode &= ~APLL_RATE;
+	switch (params_rate(params)) {
+	case 44100:
+		mode |= APLL_RATE_44100;
+		break;
+	case 48000:
+		mode |= APLL_RATE_48000;
+		break;
+	default:
+		printk(KERN_INFO "TWL4030 hw params: unknown rate %d\n",
+			params_rate(params));
+		return -EINVAL;
+	}
+
+	if (mode != old_mode) {
+		/* change rate and turn codec back on */
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+		mode |= CODECPDZ;
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+	}
+
+	/* sample size */
+	old_format = twl4030_read_reg_cache(codec, REG_AUDIO_IF);
+	format = old_format;
+	format &= ~DATA_WIDTH;
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		format |= DATA_WIDTH_16S_16W;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		format |= DATA_WIDTH_32S_24W;
+		break;
+	default:
+		printk(KERN_INFO "TWL4030 hw params: unknown format %d\n",
+			params_format(params));
+		return -EINVAL;
+	}
+
+	if (format != old_format) {
+
+		/* turn off codec before changing format */
+		mode = twl4030_read_reg_cache(codec, REG_CODEC_MODE);
+		mode &= ~CODECPDZ;
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+
+		/* change format */
+		twl4030_write(codec, REG_AUDIO_IF, format);
+
+		/* turn on codec */
+		mode |= CODECPDZ;
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+	}
+	return 0;
+}
+
+static int twl4030_mute(struct snd_soc_codec_dai *dai, int mute)
+{
+	struct snd_soc_codec *codec = dai->codec;
+
+	u8 ldac_reg = twl4030_read_reg_cache(codec, REG_ARXL2PGA);
+	u8 rdac_reg = twl4030_read_reg_cache(codec, REG_ARXR2PGA);
+
+	if (mute) {
+		twl4030_write(codec, REG_ARXL2PGA, 0x00);
+		twl4030_write(codec, REG_ARXR2PGA, 0x00);
+		twl4030_write_reg_cache(codec, REG_ARXL2PGA, ldac_reg);
+		twl4030_write_reg_cache(codec, REG_ARXR2PGA, rdac_reg);
+	} else {
+		twl4030_write(codec, REG_ARXL2PGA, ldac_reg);
+		twl4030_write(codec, REG_ARXR2PGA, rdac_reg);
+	}
+
+	return 0;
+}
+
+static int twl4030_set_dai_fmt(struct snd_soc_codec_dai *codec_dai,
+			     unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct twl4030_priv *twl4030 = codec->private_data;
+	u8 mode, old_format, format;
+
+	/* get format */
+	old_format = twl4030_read_reg_cache(codec, REG_AUDIO_IF);
+	format = old_format;
+
+	/* set master/slave audio interface */
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		format &= ~(AIF_SLAVE_EN);
+		format |= CLK256FS_EN;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		format &= ~(CLK256FS_EN);
+		format |= AIF_SLAVE_EN;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* interface format */
+	format &= ~AIF_FORMAT;
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		/* printk(KERN_INFO "TWL4030 set dai fmt: i2s\n"); */
+		format |= AIF_FORMAT_CODEC;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (format != old_format) {
+
+		/* turn off codec before changing format */
+		mode = twl4030_read_reg_cache(codec, REG_CODEC_MODE);
+		mode &= ~CODECPDZ;
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+
+		/* change format */
+		twl4030_write(codec, REG_AUDIO_IF, format);
+
+		mode |= CODECPDZ;
+		twl4030_write(codec, REG_CODEC_MODE, mode);
+	}
+
+	return 0;
+}
+
+#define TWL4030_RATES	 (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
+#define TWL4030_FORMATS	 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE)
+
+struct snd_soc_codec_dai twl4030_dai = {
+	.name = "twl4030",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = TWL4030_RATES,
+		.formats = TWL4030_FORMATS,},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = TWL4030_RATES,
+		.formats = TWL4030_FORMATS,},
+	.ops = {
+		.hw_params = twl4030_hw_params,
+	},
+	.dai_ops = {
+		.digital_mute = twl4030_mute,
+		.set_fmt = twl4030_set_dai_fmt,
+	}
+};
+EXPORT_SYMBOL_GPL(twl4030_dai);
+
+static int twl4030_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec = socdev->codec;
+
+	printk(KERN_INFO "TWL4030 Audio Codec suspend\n");
+	twl4030_dapm_event(codec, SNDRV_CTL_POWER_D3cold);
+
+	return 0;
+}
+
+static int twl4030_resume(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec = socdev->codec;
+	int i;
+	u16 *cache = codec->reg_cache;
+
+	printk(KERN_INFO "TWL4030 Audio Codec resume\n");
+	/* Sync reg_cache with the hardware */
+	for (i = REG_CODEC_MODE; i <= REG_MISC_SET_2; i++)
+		twl4030_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, cache[i], i);
+
+	twl4030_dapm_event(codec, SNDRV_CTL_POWER_D3hot);
+	twl4030_dapm_event(codec, codec->suspend_dapm_state);
+	return 0;
+}
+
+/*
+ * initialize the driver
+ * register the mixer and dsp interfaces with the kernel
+ */
+
+static int twl4030_init(struct snd_soc_device *socdev)
+{
+	struct snd_soc_codec *codec = socdev->codec;
+	int ret = 0;
+
+	printk(KERN_INFO "TWL4030 Audio Codec init \n");
+
+	codec->name = "twl4030";
+	codec->owner = THIS_MODULE;
+	codec->read = twl4030_read_reg_cache;
+	codec->write = twl4030_write;
+	codec->dapm_event = twl4030_dapm_event;
+	codec->dai = &twl4030_dai;
+	codec->num_dai = 1;
+	codec->reg_cache_size = sizeof(twl4030_reg);
+	codec->reg_cache = kmemdup(twl4030_reg, sizeof(twl4030_reg),
+					GFP_KERNEL);
+	if (codec->reg_cache == NULL)
+		return -ENOMEM;
+
+	/* register pcms */
+	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+	if (ret < 0) {
+		printk(KERN_ERR "twl4030: failed to create pcms\n");
+		goto pcm_err;
+	}
+
+	twl4030_add_controls(codec);
+	twl4030_add_widgets(codec);
+
+	ret = snd_soc_register_card(socdev);
+	if (ret < 0) {
+		printk(KERN_ERR "twl4030: failed to register card\n");
+		goto card_err;
+	}
+
+	twl4030_init_chip();
+	twl4030_power_up(codec, APLL_RATE_44100 | OPT_MODE);
+
+	return ret;
+
+card_err:
+	printk(KERN_INFO "TWL4030 Audio Codec init card error\n");
+	snd_soc_free_pcms(socdev);
+	snd_soc_dapm_free(socdev);
+pcm_err:
+	printk(KERN_INFO "TWL4030 Audio Codec init pcm error\n");
+	kfree(codec->reg_cache);
+	return ret;
+}
+
+static struct snd_soc_device *twl4030_socdev;
+
+static int twl4030_probe(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec;
+	struct twl4030_priv *twl4030;
+
+	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+	if (codec == NULL)
+		return -ENOMEM;
+
+	twl4030 = kzalloc(sizeof(struct twl4030_priv), GFP_KERNEL);
+	if (twl4030 == NULL) {
+		kfree(codec);
+		return -ENOMEM;
+	}
+
+	codec->private_data = twl4030;
+	socdev->codec = codec;
+	mutex_init(&codec->mutex);
+	INIT_LIST_HEAD(&codec->dapm_widgets);
+	INIT_LIST_HEAD(&codec->dapm_paths);
+
+	twl4030_socdev = socdev;
+	twl4030_init(socdev);
+
+	return 0;
+}
+
+static int twl4030_remove(struct platform_device *pdev)
+{
+	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+	struct snd_soc_codec *codec = socdev->codec;
+
+	printk(KERN_INFO "TWL4030 Audio Codec remove\n");
+	kfree(codec->private_data);
+	kfree(codec);
+
+	return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_twl4030 = {
+	.probe = twl4030_probe,
+	.remove = twl4030_remove,
+	.suspend = twl4030_suspend,
+	.resume = twl4030_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_twl4030);
+
+MODULE_DESCRIPTION("ASoC TWL4030 codec driver");
+MODULE_AUTHOR("Steve Sakoman");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/twl4030.h b/sound/soc/codecs/twl4030.h
new file mode 100644
index 0000000..6eecde1
--- /dev/null
+++ b/sound/soc/codecs/twl4030.h
@@ -0,0 +1,152 @@
+/*
+ * ALSA SoC TWL4030 codec driver
+ *
+ * Author:      Steve Sakoman, <steve@sakoman.com>
+ *
+ * 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.
+ */
+
+#ifndef __TWL4030_AUDIO_H__
+#define __TWL4030_AUDIO_H__
+
+#define REG_CODEC_MODE		0x1
+#define REG_OPTION		0x2
+#define REG_UNKNOWN		0x3
+#define REG_MICBIAS_CTL		0x4
+#define REG_ANAMICL		0x5
+#define REG_ANAMICR		0x6
+#define REG_AVADC_CTL		0x7
+#define REG_ADCMICSEL		0x8
+#define REG_DIGMIXING		0x9
+#define REG_ATXL1PGA		0xA
+#define REG_ATXR1PGA		0xB
+#define REG_AVTXL2PGA		0xC
+#define REG_AVTXR2PGA		0xD
+#define REG_AUDIO_IF		0xE
+#define REG_VOICE_IF		0xF
+#define REG_ARXR1PGA		0x10
+#define REG_ARXL1PGA		0x11
+#define REG_ARXR2PGA		0x12
+#define REG_ARXL2PGA		0x13
+#define REG_VRXPGA		0x14
+#define REG_VSTPGA		0x15
+#define REG_VRX2ARXPGA		0x16
+#define REG_AVDAC_CTL		0x17
+#define REG_ARX2VTXPGA		0x18
+#define REG_ARXL1_APGA_CTL	0x19
+#define REG_ARXR1_APGA_CTL	0x1A
+#define REG_ARXL2_APGA_CTL	0x1B
+#define REG_ARXR2_APGA_CTL	0x1C
+#define REG_ATX2ARXPGA		0x1D
+#define REG_BT_IF		0x1E
+#define REG_BTPGA		0x1F
+#define REG_BTSTPGA		0x20
+#define REG_EAR_CTL		0x21
+#define REG_HS_SEL		0x22
+#define REG_HS_GAIN_SET		0x23
+#define REG_HS_POPN_SET		0x24
+#define REG_PREDL_CTL		0x25
+#define REG_PREDR_CTL		0x26
+#define REG_PRECKL_CTL		0x27
+#define REG_PRECKR_CTL		0x28
+#define REG_HFL_CTL		0x29
+#define REG_HFR_CTL		0x2A
+#define REG_ALC_CTL		0x2B
+#define REG_ALC_SET1		0x2C
+#define REG_ALC_SET2		0x2D
+#define REG_BOOST_CTL		0x2E
+#define REG_SOFTVOL_CTL		0x2F
+#define REG_DTMF_FREQSEL	0x30
+#define REG_DTMF_TONEXT1H	0x31
+#define REG_DTMF_TONEXT1L	0x32
+#define REG_DTMF_TONEXT2H	0x33
+#define REG_DTMF_TONEXT2L	0x34
+#define REG_DTMF_TONOFF		0x35
+#define REG_DTMF_WANONOFF	0x36
+#define REG_I2S_RX_SCRAMBLE_H	0x37
+#define REG_I2S_RX_SCRAMBLE_M	0x38
+#define REG_I2S_RX_SCRAMBLE_L	0x39
+#define REG_APLL_CTL		0x3A
+#define REG_DTMF_CTL		0x3B
+#define REG_DTMF_PGA_CTL2	0x3C
+#define REG_DTMF_PGA_CTL1	0x3D
+#define REG_MISC_SET_1		0x3E
+#define REG_PCMBTMUX		0x3F
+#define REG_RX_PATH_SEL		0x43
+#define REG_VDL_APGA_CTL	0x44
+#define REG_VIBRA_CTL		0x45
+#define REG_VIBRA_SET		0x46
+#define REG_VIBRA_PWM_SET	0x47
+#define REG_ANAMIC_GAIN		0x48
+#define REG_MISC_SET_2		0x49
+
+#define TWL4030_CACHEREGNUM	(REG_MISC_SET_2 + 1)
+
+/* Bitfield Definitions */
+
+/* CODEC_MODE (0x01) Fields */
+
+#define APLL_RATE		0xF0
+#define APLL_RATE_8000		0x00
+#define APLL_RATE_11025		0x10
+#define APLL_RATE_12000		0x20
+#define APLL_RATE_16000		0x40
+#define APLL_RATE_22050		0x50
+#define APLL_RATE_24000		0x60
+#define APLL_RATE_32000		0x80
+#define APLL_RATE_44100		0x90
+#define APLL_RATE_48000		0xa0
+#define SEL_16K			0x04
+#define CODECPDZ		0x02
+#define OPT_MODE		0x01
+
+/* AUDIO_IF (0x0E) Fields */
+
+#define AIF_SLAVE_EN		0x80
+#define DATA_WIDTH		0x60
+#define DATA_WIDTH_16S_16W	0x00
+#define DATA_WIDTH_32S_16W	0x40
+#define DATA_WIDTH_32S_24W	0x60
+#define AIF_FORMAT		0x18
+#define AIF_FORMAT_CODEC	0x00
+#define AIF_FORMAT_LEFT		0x08
+#define AIF_FORMAT_RIGHT	0x10
+#define AIF_FORMAT_TDM		0x18
+#define AIF_TRI_EN		0x04
+#define CLK256FS_EN		0x02
+#define AIF_EN			0x01
+
+/* HS_GAIN_SET (0x23) Fields */
+
+#define HSR_GAIN		0x0c
+#define HSR_GAIN_PWR_DOWN	0x00
+#define HSR_GAIN_PLUS_6DB	0x04
+#define HSR_GAIN_0DB		0x08
+#define HSR_GAIN_MINUS_6DB	0x0c
+#define HSL_GAIN		0x0c
+#define HSL_GAIN_PWR_DOWN	0x00
+#define HSL_GAIN_PLUS_6DB	0x01
+#define HSL_GAIN_0DB		0x02
+#define HSL_GAIN_MINUS_6DB	0x03
+
+/* HS_POPN_SET (0x24) Fields */
+
+#define VMID_EN			0x40
+#define	EXTMUTE			0x20
+#define RAMP_DELAY		0x1C
+#define RAMP_DELAY_20MS		0x00
+#define RAMP_DELAY_40MS		0x04
+#define RAMP_DELAY_81MS		0x08
+#define RAMP_DELAY_161MS	0x0c
+#define RAMP_DELAY_323MS	0x10
+#define RAMP_DELAY_645MS	0x14
+#define RAMP_DELAY_1291MS	0x18
+#define RAMP_DELAY_2581MS	0x1c
+#define RAMP_EN			0x02
+
+extern struct snd_soc_codec_dai twl4030_dai;
+extern struct snd_soc_codec_device soc_codec_dev_twl4030;
+
+#endif	/* End of __TWL4030_AUDIO_H__ */