Message-Id: <1307971582-13532-1-git-send-email-lars@metafoo.de>
Date:	Mon, 13 Jun 2011 15:26:20 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>
Cc:	alsa-devel@...a-project.org,
	device-drivers-devel@...ckfin.uclinux.org,
	linux-kernel@...r.kernel.org,
	Mike Frysinger <vapier.adi@...il.com>,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 1/3 v2] ASoC: Add ADAU1701 codec driver

This patch adds support for the Analog Devices ADAU1701 SigmaDSP.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>

---
Changes since v1:
Move the error message for unsupported register addresses to
adau1701_register_size.
---
 sound/soc/codecs/Kconfig    |    7 +-
 sound/soc/codecs/Makefile   |    2 +
 sound/soc/codecs/adau1701.c |  548 +++++++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/adau1701.h |   17 ++
 4 files changed, 573 insertions(+), 1 deletions(-)
 create mode 100644 sound/soc/codecs/adau1701.c
 create mode 100644 sound/soc/codecs/adau1701.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 98175a0..f745e55 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -17,6 +17,7 @@ config SND_SOC_ALL_CODECS
 	select SND_SOC_AD193X if SND_SOC_I2C_AND_SPI
 	select SND_SOC_AD1980 if SND_SOC_AC97_BUS
 	select SND_SOC_AD73311
+	select SND_SOC_ADAU1701 if I2C
 	select SND_SOC_ADS117X
 	select SND_SOC_AK4104 if SPI_MASTER
 	select SND_SOC_AK4535 if I2C
@@ -130,7 +131,11 @@ config SND_SOC_AD1980
 
 config SND_SOC_AD73311
 	tristate
-	
+
+config SND_SOC_ADAU1701
+	select SIGMA
+	tristate
+
 config SND_SOC_ADS117X
 	tristate
 
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index fd85584..30a4c63 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -4,6 +4,7 @@ snd-soc-ad1836-objs := ad1836.o
 snd-soc-ad193x-objs := ad193x.o
 snd-soc-ad1980-objs := ad1980.o
 snd-soc-ad73311-objs := ad73311.o
+snd-soc-adau1701-objs := adau1701.o
 snd-soc-ads117x-objs := ads117x.o
 snd-soc-ak4104-objs := ak4104.o
 snd-soc-ak4535-objs := ak4535.o
@@ -95,6 +96,7 @@ obj-$(CONFIG_SND_SOC_AD1836)	+= snd-soc-ad1836.o
 obj-$(CONFIG_SND_SOC_AD193X)	+= snd-soc-ad193x.o
 obj-$(CONFIG_SND_SOC_AD1980)	+= snd-soc-ad1980.o
 obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
+obj-$(CONFIG_SND_SOC_ADAU1701)  += snd-soc-adau1701.o
 obj-$(CONFIG_SND_SOC_ADS117X)	+= snd-soc-ads117x.o
 obj-$(CONFIG_SND_SOC_AK4104)	+= snd-soc-ak4104.o
 obj-$(CONFIG_SND_SOC_AK4535)	+= snd-soc-ak4535.o
diff --git a/sound/soc/codecs/adau1701.c b/sound/soc/codecs/adau1701.c
new file mode 100644
index 0000000..6c01bb6
--- /dev/null
+++ b/sound/soc/codecs/adau1701.c
@@ -0,0 +1,548 @@
+/*
+ * Driver for ADAU1701 SigmaDSP processor
+ *
+ * Copyright 2011 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@...afoo.de>
+ *	based on an inital version by Cliff Cai <cliff.cai@...log.com>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/sigma.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "adau1701.h"
+
+#define ADAU1701_DSPCTRL	0x1c
+#define ADAU1701_SEROCTL	0x1e
+#define ADAU1701_SERICTL	0x1f
+
+#define ADAU1701_AUXNPOW	0x22
+
+#define ADAU1701_OSCIPOW	0x26
+#define ADAU1701_DACSET		0x27
+
+#define ADAU1701_NUM_REGS	0x28
+
+#define ADAU1701_DSPCTRL_CR		(1 << 2)
+#define ADAU1701_DSPCTRL_DAM		(1 << 3)
+#define ADAU1701_DSPCTRL_ADM		(1 << 4)
+#define ADAU1701_DSPCTRL_SR_48		0x00
+#define ADAU1701_DSPCTRL_SR_96		0x01
+#define ADAU1701_DSPCTRL_SR_192		0x02
+#define ADAU1701_DSPCTRL_SR_MASK	0x03
+
+#define ADAU1701_SEROCTL_INV_LRCLK	0x2000
+#define ADAU1701_SEROCTL_INV_BCLK	0x1000
+#define ADAU1701_SEROCTL_MASTER		0x0800
+
+#define ADAU1701_SEROCTL_OBF16		0x0000
+#define ADAU1701_SEROCTL_OBF8		0x0200
+#define ADAU1701_SEROCTL_OBF4		0x0400
+#define ADAU1701_SEROCTL_OBF2		0x0600
+#define ADAU1701_SEROCTL_OBF_MASK	0x0600
+
+#define ADAU1701_SEROCTL_OLF1024	0x0000
+#define ADAU1701_SEROCTL_OLF512		0x0080
+#define ADAU1701_SEROCTL_OLF256		0x0100
+#define ADAU1701_SEROCTL_OLF_MASK	0x0180
+
+#define ADAU1701_SEROCTL_MSB_DEALY1	0x0000
+#define ADAU1701_SEROCTL_MSB_DEALY0	0x0004
+#define ADAU1701_SEROCTL_MSB_DEALY8	0x0008
+#define ADAU1701_SEROCTL_MSB_DEALY12	0x000c
+#define ADAU1701_SEROCTL_MSB_DEALY16	0x0010
+#define ADAU1701_SEROCTL_MSB_DEALY_MASK	0x001c
+
+#define ADAU1701_SEROCTL_WORD_LEN_24	0x0000
+#define ADAU1701_SEROCTL_WORD_LEN_20	0x0001
+#define ADAU1701_SEROCTL_WORD_LEN_16	0x0010
+#define ADAU1701_SEROCTL_WORD_LEN_MASK	0x0003
+
+#define ADAU1701_AUXNPOW_VBPD		0x40
+#define ADAU1701_AUXNPOW_VRPD		0x20
+
+#define ADAU1701_SERICTL_I2S		0
+#define ADAU1701_SERICTL_LEFTJ		1
+#define ADAU1701_SERICTL_TDM		2
+#define ADAU1701_SERICTL_RIGHTJ_24	3
+#define ADAU1701_SERICTL_RIGHTJ_20	4
+#define ADAU1701_SERICTL_RIGHTJ_18	5
+#define ADAU1701_SERICTL_RIGHTJ_16	6
+#define ADAU1701_SERICTL_MODE_MASK	7
+#define ADAU1701_SERICTL_INV_BCLK	BIT(3)
+#define ADAU1701_SERICTL_INV_LRCLK	BIT(4)
+
+#define ADAU1701_OSCIPOW_OPD		0x04
+#define ADAU1701_DACSET_DACINIT		1
+
+#define ADAU1701_FIRMWARE "adau1701.bin"
+
+struct adau1701 {
+	unsigned int dai_fmt;
+};
+
+static const struct snd_kcontrol_new adau1701_controls[] = {
+	SOC_SINGLE("Master Capture Switch", ADAU1701_DSPCTRL, 4, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget adau1701_dapm_widgets[] = {
+	SND_SOC_DAPM_DAC("DAC0", "Playback", ADAU1701_AUXNPOW, 3, 1),
+	SND_SOC_DAPM_DAC("DAC1", "Playback", ADAU1701_AUXNPOW, 2, 1),
+	SND_SOC_DAPM_DAC("DAC2", "Playback", ADAU1701_AUXNPOW, 1, 1),
+	SND_SOC_DAPM_DAC("DAC3", "Playback", ADAU1701_AUXNPOW, 0, 1),
+	SND_SOC_DAPM_ADC("ADC", "Capture", ADAU1701_AUXNPOW, 7, 1),
+
+	SND_SOC_DAPM_OUTPUT("OUT0"),
+	SND_SOC_DAPM_OUTPUT("OUT1"),
+	SND_SOC_DAPM_OUTPUT("OUT2"),
+	SND_SOC_DAPM_OUTPUT("OUT3"),
+	SND_SOC_DAPM_INPUT("IN0"),
+	SND_SOC_DAPM_INPUT("IN1"),
+};
+
+static const struct snd_soc_dapm_route adau1701_dapm_routes[] = {
+	{ "OUT0", NULL, "DAC0" },
+	{ "OUT1", NULL, "DAC1" },
+	{ "OUT2", NULL, "DAC2" },
+	{ "OUT3", NULL, "DAC3" },
+
+	{ "ADC", NULL, "IN0" },
+	{ "ADC", NULL, "IN1" },
+};
+
+static unsigned int adau1701_register_size(struct snd_soc_codec *codec,
+		unsigned int reg)
+{
+	switch (reg) {
+	case ADAU1701_DSPCTRL:
+	case ADAU1701_SEROCTL:
+	case ADAU1701_AUXNPOW:
+	case ADAU1701_OSCIPOW:
+	case ADAU1701_DACSET:
+		return 2;
+	case ADAU1701_SERICTL:
+		return 1;
+	}
+
+	dev_err(codec->dev, "Unsupported register address: %d\n", reg);
+	return 0;
+}
+
+static int adau1701_write(struct snd_soc_codec *codec, unsigned int reg,
+		unsigned int value)
+{
+	unsigned int i, ret;
+	unsigned int size;
+	uint8_t buf[4];
+
+	size = adau1701_register_size(codec, reg);
+	if (size == 0)
+		return -EINVAL;
+
+	snd_soc_cache_write(codec, reg, value);
+
+	buf[0] = 0x08;
+	buf[1] = reg;
+
+	for (i = size + 1; i >= 2; --i) {
+		buf[i] = value;
+		value >>= 8;
+	}
+
+	ret = i2c_master_send(to_i2c_client(codec->dev), buf, size + 2);
+	if (ret == size + 2)
+		return 0;
+	else if (ret < 0)
+		return ret;
+	else
+		return -EIO;
+}
+
+static unsigned int adau1701_read(struct snd_soc_codec *codec, unsigned int reg)
+{
+	unsigned int value;
+	unsigned int ret;
+
+	ret = snd_soc_cache_read(codec, reg, &value);
+	if (ret)
+		return ret;
+
+	return value;
+}
+
+static int adau1701_load_firmware(struct snd_soc_codec *codec)
+{
+	return process_sigma_firmware(codec->control_data, ADAU1701_FIRMWARE);
+}
+
+static int adau1701_set_capture_pcm_format(struct snd_soc_codec *codec,
+		snd_pcm_format_t format)
+{
+	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
+	unsigned int mask = ADAU1701_SEROCTL_WORD_LEN_MASK;
+	unsigned int val;
+
+	switch (format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		val = ADAU1701_SEROCTL_WORD_LEN_16;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		val = ADAU1701_SEROCTL_WORD_LEN_20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val = ADAU1701_SEROCTL_WORD_LEN_24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (adau1701->dai_fmt == SND_SOC_DAIFMT_RIGHT_J) {
+		switch (format) {
+		case SNDRV_PCM_FORMAT_S16_LE:
+			val |= ADAU1701_SEROCTL_MSB_DEALY16;
+			break;
+		case SNDRV_PCM_FORMAT_S20_3LE:
+			val |= ADAU1701_SEROCTL_MSB_DEALY12;
+			break;
+		case SNDRV_PCM_FORMAT_S24_LE:
+			val |= ADAU1701_SEROCTL_MSB_DEALY8;
+			break;
+		}
+		mask |= ADAU1701_SEROCTL_MSB_DEALY_MASK;
+	}
+
+	snd_soc_update_bits(codec, ADAU1701_SEROCTL, mask, val);
+
+	return 0;
+}
+
+static int adau1701_set_playback_pcm_format(struct snd_soc_codec *codec,
+			snd_pcm_format_t format)
+{
+	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
+	unsigned int val;
+
+	if (adau1701->dai_fmt != SND_SOC_DAIFMT_RIGHT_J)
+		return 0;
+
+	switch (format) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		val = ADAU1701_SERICTL_RIGHTJ_16;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		val = ADAU1701_SERICTL_RIGHTJ_20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val = ADAU1701_SERICTL_RIGHTJ_24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, ADAU1701_SERICTL,
+		ADAU1701_SERICTL_MODE_MASK, val);
+
+	return 0;
+}
+
+static int adau1701_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;
+	snd_pcm_format_t format;
+	unsigned int val;
+
+	switch (params_rate(params)) {
+	case 192000:
+		val = ADAU1701_DSPCTRL_SR_192;
+		break;
+	case 96000:
+		val = ADAU1701_DSPCTRL_SR_96;
+		break;
+	case 48000:
+		val = ADAU1701_DSPCTRL_SR_48;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, ADAU1701_DSPCTRL,
+		ADAU1701_DSPCTRL_SR_MASK, val);
+
+	format = params_format(params);
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		return adau1701_set_playback_pcm_format(codec, format);
+	else
+		return adau1701_set_capture_pcm_format(codec, format);
+}
+
+static int adau1701_set_dai_fmt(struct snd_soc_dai *codec_dai,
+		unsigned int fmt)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
+	unsigned int serictl = 0x00, seroctl = 0x00;
+	bool invert_lrclk;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		/* master, 64-bits per sample, 1 frame per sample */
+		seroctl |= ADAU1701_SEROCTL_MASTER | ADAU1701_SEROCTL_OBF16
+				| ADAU1701_SEROCTL_OLF1024;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* clock inversion */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		invert_lrclk = false;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		invert_lrclk = true;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		invert_lrclk = false;
+		serictl |= ADAU1701_SERICTL_INV_BCLK;
+		seroctl |= ADAU1701_SEROCTL_INV_BCLK;
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		invert_lrclk = true;
+		serictl |= ADAU1701_SERICTL_INV_BCLK;
+		seroctl |= ADAU1701_SEROCTL_INV_BCLK;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		serictl |= ADAU1701_SERICTL_LEFTJ;
+		seroctl |= ADAU1701_SEROCTL_MSB_DEALY0;
+		invert_lrclk = !invert_lrclk;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		serictl |= ADAU1701_SERICTL_RIGHTJ_24;
+		seroctl |= ADAU1701_SEROCTL_MSB_DEALY8;
+		invert_lrclk = !invert_lrclk;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (invert_lrclk) {
+		seroctl |= ADAU1701_SEROCTL_INV_LRCLK;
+		serictl |= ADAU1701_SERICTL_INV_LRCLK;
+	}
+
+	adau1701->dai_fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+
+	snd_soc_write(codec, ADAU1701_SERICTL, serictl);
+	snd_soc_update_bits(codec, ADAU1701_SEROCTL,
+		~ADAU1701_SEROCTL_WORD_LEN_MASK, seroctl);
+
+	return 0;
+}
+
+static int adau1701_set_bias_level(struct snd_soc_codec *codec,
+		enum snd_soc_bias_level level)
+{
+	unsigned int mask = ADAU1701_AUXNPOW_VBPD | ADAU1701_AUXNPOW_VRPD;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		/* Enable VREF and VREF buffer */
+		snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, 0x00);
+		break;
+	case SND_SOC_BIAS_OFF:
+		/* Disable VREF and VREF buffer */
+		snd_soc_update_bits(codec, ADAU1701_AUXNPOW, mask, mask);
+		break;
+	}
+
+	codec->dapm.bias_level = level;
+	return 0;
+}
+
+static int adau1701_digital_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_codec *codec = dai->codec;
+	unsigned int mask = ADAU1701_DSPCTRL_DAM;
+	unsigned int val;
+
+	if (mute)
+		val = 0;
+	else
+		val = mask;
+
+	snd_soc_update_bits(codec, ADAU1701_DSPCTRL, mask, val);
+
+	return 0;
+}
+
+static int adau1701_set_sysclk(struct snd_soc_codec *codec, int clk_id,
+	unsigned int freq, int dir)
+{
+	unsigned int val;
+
+	switch (clk_id) {
+	case ADAU1701_CLK_SRC_OSC:
+		val = 0x0;
+		break;
+	case ADAU1701_CLK_SRC_MCLK:
+		val = ADAU1701_OSCIPOW_OPD;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, ADAU1701_OSCIPOW, ADAU1701_OSCIPOW_OPD, val);
+
+	return 0;
+}
+
+#define ADAU1701_RATES (SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
+	SNDRV_PCM_RATE_192000)
+
+#define ADAU1701_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+	SNDRV_PCM_FMTBIT_S24_LE)
+
+static const struct snd_soc_dai_ops adau1701_dai_ops = {
+	.set_fmt	= adau1701_set_dai_fmt,
+	.hw_params	= adau1701_hw_params,
+	.digital_mute	= adau1701_digital_mute,
+};
+
+static struct snd_soc_dai_driver adau1701_dai = {
+	.name = "adau1701",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 2,
+		.channels_max = 8,
+		.rates = ADAU1701_RATES,
+		.formats = ADAU1701_FORMATS,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 2,
+		.channels_max = 8,
+		.rates = ADAU1701_RATES,
+		.formats = ADAU1701_FORMATS,
+	},
+	.ops = &adau1701_dai_ops,
+	.symmetric_rates = 1,
+};
+
+static int adau1701_probe(struct snd_soc_codec *codec)
+{
+	int ret;
+
+	codec->dapm.idle_bias_off = 1;
+
+	ret = adau1701_load_firmware(codec);
+	if (ret)
+		dev_warn(codec->dev, "Failed to load firmware\n");
+
+	snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT);
+	snd_soc_write(codec, ADAU1701_DSPCTRL, ADAU1701_DSPCTRL_CR);
+
+	return 0;
+}
+
+static struct snd_soc_codec_driver adau1701_codec_drv = {
+	.probe			= adau1701_probe,
+	.set_bias_level		= adau1701_set_bias_level,
+
+	.reg_cache_size		= ADAU1701_NUM_REGS,
+	.reg_word_size		= sizeof(u16),
+
+	.controls		= adau1701_controls,
+	.num_controls		= ARRAY_SIZE(adau1701_controls),
+	.dapm_widgets		= adau1701_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(adau1701_dapm_widgets),
+	.dapm_routes		= adau1701_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(adau1701_dapm_routes),
+
+	.write			= adau1701_write,
+	.read			= adau1701_read,
+
+	.set_sysclk		= adau1701_set_sysclk,
+};
+
+static __devinit int adau1701_i2c_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct adau1701 *adau1701;
+	int ret;
+
+	adau1701 = kzalloc(sizeof(*adau1701), GFP_KERNEL);
+	if (!adau1701)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, adau1701);
+	ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,
+			&adau1701_dai, 1);
+	if (ret < 0)
+		kfree(adau1701);
+
+	return ret;
+}
+
+static __devexit int adau1701_i2c_remove(struct i2c_client *client)
+{
+	snd_soc_unregister_codec(&client->dev);
+	kfree(i2c_get_clientdata(client));
+	return 0;
+}
+
+static const struct i2c_device_id adau1701_i2c_id[] = {
+	{ "adau1701", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adau1701_i2c_id);
+
+static struct i2c_driver adau1701_i2c_driver = {
+	.driver = {
+		.name	= "adau1701",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= adau1701_i2c_probe,
+	.remove		= __devexit_p(adau1701_i2c_remove),
+	.id_table	= adau1701_i2c_id,
+};
+
+static int __init adau1701_init(void)
+{
+	return i2c_add_driver(&adau1701_i2c_driver);
+}
+module_init(adau1701_init);
+
+static void __exit adau1701_exit(void)
+{
+	i2c_del_driver(&adau1701_i2c_driver);
+}
+module_exit(adau1701_exit);
+
+MODULE_DESCRIPTION("ASoC ADAU1701 SigmaDSP driver");
+MODULE_AUTHOR("Cliff Cai <cliff.cai@...log.com>");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@...afoo.de>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/adau1701.h b/sound/soc/codecs/adau1701.h
new file mode 100644
index 0000000..8d0949a
--- /dev/null
+++ b/sound/soc/codecs/adau1701.h
@@ -0,0 +1,17 @@
+/*
+ * header file for ADAU1701 SigmaDSP processor
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _ADAU1701_H
+#define _ADAU1701_H
+
+enum adau1701_clk_src {
+	ADAU1701_CLK_SRC_OSC,
+	ADAU1701_CLK_SRC_MCLK,
+};
+
+#endif
-- 
1.7.2.5

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