21 files changed, 725 insertions, 85 deletions

diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig
index fe83d0d..fb1bf258 100644
--- a/sound/soc/omap/Kconfig
+++ b/sound/soc/omap/Kconfig
@@ -2,6 +2,9 @@ config SND_OMAP_SOC
 	tristate "SoC Audio for the Texas Instruments OMAP chips"
 	depends on ARCH_OMAP
 
+config SND_OMAP_SOC_DMIC
+	tristate
+
 config SND_OMAP_SOC_MCBSP
 	tristate
 	select OMAP_MCBSP
@@ -97,8 +100,10 @@ config SND_OMAP_SOC_SDP3430
 config SND_OMAP_SOC_SDP4430
 	tristate "SoC Audio support for Texas Instruments SDP4430"
 	depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OMAP_4430SDP
+	select SND_OMAP_SOC_DMIC
 	select SND_OMAP_SOC_MCPDM
 	select SND_SOC_TWL6040
+	select SND_SOC_DMIC
 	help
 	  Say Y if you want to add support for SoC audio on Texas Instruments
 	  SDP4430.
diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile
index 052fd75..1fd723f 100644
--- a/sound/soc/omap/Makefile
+++ b/sound/soc/omap/Makefile
@@ -1,10 +1,12 @@
 # OMAP Platform Support
 snd-soc-omap-objs := omap-pcm.o
+snd-soc-omap-dmic-objs := omap-dmic.o
 snd-soc-omap-mcbsp-objs := omap-mcbsp.o
 snd-soc-omap-mcpdm-objs := omap-mcpdm.o
 snd-soc-omap-hdmi-objs := omap-hdmi.o
 
 obj-$(CONFIG_SND_OMAP_SOC) += snd-soc-omap.o
+obj-$(CONFIG_SND_OMAP_SOC_DMIC) += snd-soc-omap-dmic.o
 obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o
 obj-$(CONFIG_SND_OMAP_SOC_MCPDM) += snd-soc-omap-mcpdm.o
 obj-$(CONFIG_SND_OMAP_SOC_HDMI) += snd-soc-omap-hdmi.o
diff --git a/sound/soc/omap/am3517evm.c b/sound/soc/omap/am3517evm.c
index c1cd4a0..add4866 100644
--- a/sound/soc/omap/am3517evm.c
+++ b/sound/soc/omap/am3517evm.c
@@ -107,6 +107,7 @@ static struct snd_soc_dai_link am3517evm_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_am3517evm = {
 	.name = "am3517evm",
+	.owner = THIS_MODULE,
 	.dai_link = &am3517evm_dai,
 	.num_links = 1,
 
diff --git a/sound/soc/omap/ams-delta.c b/sound/soc/omap/ams-delta.c
index ccb8a6a..a67f437 100644
--- a/sound/soc/omap/ams-delta.c
+++ b/sound/soc/omap/ams-delta.c
@@ -431,22 +431,20 @@ static int ams_delta_set_bias_level(struct snd_soc_card *card,
 				    struct snd_soc_dapm_context *dapm,
 				    enum snd_soc_bias_level level)
 {
-	struct snd_soc_codec *codec = card->rtd->codec;
-
 	switch (level) {
 	case SND_SOC_BIAS_ON:
 	case SND_SOC_BIAS_PREPARE:
 	case SND_SOC_BIAS_STANDBY:
-		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+		if (card->dapm.bias_level == SND_SOC_BIAS_OFF)
 			ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_NRESET,
 						AMS_DELTA_LATCH2_MODEM_NRESET);
 		break;
 	case SND_SOC_BIAS_OFF:
-		if (codec->dapm.bias_level != SND_SOC_BIAS_OFF)
+		if (card->dapm.bias_level != SND_SOC_BIAS_OFF)
 			ams_delta_latch2_write(AMS_DELTA_LATCH2_MODEM_NRESET,
 						0);
 	}
-	codec->dapm.bias_level = level;
+	card->dapm.bias_level = level;
 
 	return 0;
 }
@@ -474,7 +472,7 @@ static int ams_delta_digital_mute(struct snd_soc_dai *dai, int mute)
 }
 
 /* Our codec DAI probably doesn't have its own .ops structure */
-static struct snd_soc_dai_ops ams_delta_dai_ops = {
+static const struct snd_soc_dai_ops ams_delta_dai_ops = {
 	.digital_mute = ams_delta_digital_mute,
 };
 
@@ -597,6 +595,7 @@ static struct snd_soc_dai_link ams_delta_dai_link = {
 /* Audio card driver */
 static struct snd_soc_card ams_delta_audio_card = {
 	.name = "AMS_DELTA",
+	.owner = THIS_MODULE,
 	.dai_link = &ams_delta_dai_link,
 	.num_links = 1,
 	.set_bias_level = ams_delta_set_bias_level,
diff --git a/sound/soc/omap/igep0020.c b/sound/soc/omap/igep0020.c
index 591fbf8..ccae58a 100644
--- a/sound/soc/omap/igep0020.c
+++ b/sound/soc/omap/igep0020.c
@@ -72,6 +72,7 @@ static struct snd_soc_dai_link igep2_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_card_igep2 = {
 	.name = "igep2",
+	.owner = THIS_MODULE,
 	.dai_link = &igep2_dai,
 	.num_links = 1,
 };
diff --git a/sound/soc/omap/n810.c b/sound/soc/omap/n810.c
index fc6209b..597be41 100644
--- a/sound/soc/omap/n810.c
+++ b/sound/soc/omap/n810.c
@@ -289,6 +289,7 @@ static struct snd_soc_dai_link n810_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_n810 = {
 	.name = "N810",
+	.owner = THIS_MODULE,
 	.dai_link = &n810_dai,
 	.num_links = 1,
 
diff --git a/sound/soc/omap/omap-dmic.c b/sound/soc/omap/omap-dmic.c
new file mode 100644
index 0000000..0855c1c
--- /dev/null
+++ b/sound/soc/omap/omap-dmic.c
@@ -0,0 +1,546 @@
+/*
+ * omap-dmic.c  --  OMAP ASoC DMIC DAI driver
+ *
+ * Copyright (C) 2010 - 2011 Texas Instruments
+ *
+ * Author: David Lambert <dlambert@ti.com>
+ *	   Misael Lopez Cruz <misael.lopez@ti.com>
+ *	   Liam Girdwood <lrg@ti.com>
+ *	   Peter Ujfalusi <peter.ujfalusi@ti.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.
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <plat/dma.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "omap-pcm.h"
+#include "omap-dmic.h"
+
+struct omap_dmic {
+	struct device *dev;
+	void __iomem *io_base;
+	struct clk *fclk;
+	int fclk_freq;
+	int out_freq;
+	int clk_div;
+	int sysclk;
+	int threshold;
+	u32 ch_enabled;
+	bool active;
+	struct mutex mutex;
+};
+
+/*
+ * Stream DMA parameters
+ */
+static struct omap_pcm_dma_data omap_dmic_dai_dma_params = {
+	.name		= "DMIC capture",
+	.data_type	= OMAP_DMA_DATA_TYPE_S32,
+	.sync_mode	= OMAP_DMA_SYNC_PACKET,
+};
+
+static inline void omap_dmic_write(struct omap_dmic *dmic, u16 reg, u32 val)
+{
+	__raw_writel(val, dmic->io_base + reg);
+}
+
+static inline int omap_dmic_read(struct omap_dmic *dmic, u16 reg)
+{
+	return __raw_readl(dmic->io_base + reg);
+}
+
+static inline void omap_dmic_start(struct omap_dmic *dmic)
+{
+	u32 ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+
+	/* Configure DMA controller */
+	omap_dmic_write(dmic, OMAP_DMIC_DMAENABLE_SET_REG,
+			OMAP_DMIC_DMA_ENABLE);
+
+	omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, ctrl | dmic->ch_enabled);
+}
+
+static inline void omap_dmic_stop(struct omap_dmic *dmic)
+{
+	u32 ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+	omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG,
+			ctrl & ~OMAP_DMIC_UP_ENABLE_MASK);
+
+	/* Disable DMA request generation */
+	omap_dmic_write(dmic, OMAP_DMIC_DMAENABLE_CLR_REG,
+			OMAP_DMIC_DMA_ENABLE);
+
+}
+
+static inline int dmic_is_enabled(struct omap_dmic *dmic)
+{
+	return omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG) &
+						OMAP_DMIC_UP_ENABLE_MASK;
+}
+
+static int omap_dmic_dai_startup(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+	int ret = 0;
+
+	mutex_lock(&dmic->mutex);
+
+	if (!dai->active) {
+		snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24);
+		dmic->active = 1;
+	} else {
+		ret = -EBUSY;
+	}
+
+	mutex_unlock(&dmic->mutex);
+
+	return ret;
+}
+
+static void omap_dmic_dai_shutdown(struct snd_pcm_substream *substream,
+				    struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+	mutex_lock(&dmic->mutex);
+
+	if (!dai->active)
+		dmic->active = 0;
+
+	mutex_unlock(&dmic->mutex);
+}
+
+static int omap_dmic_select_divider(struct omap_dmic *dmic, int sample_rate)
+{
+	int divider = -EINVAL;
+
+	/*
+	 * 192KHz rate is only supported with 19.2MHz/3.84MHz clock
+	 * configuration.
+	 */
+	if (sample_rate == 192000) {
+		if (dmic->fclk_freq == 19200000 && dmic->out_freq == 3840000)
+			divider = 0x6; /* Divider: 5 (192KHz sampling rate) */
+		else
+			dev_err(dmic->dev,
+				"invalid clock configuration for 192KHz\n");
+
+		return divider;
+	}
+
+	switch (dmic->out_freq) {
+	case 1536000:
+		if (dmic->fclk_freq != 24576000)
+			goto div_err;
+		divider = 0x4; /* Divider: 16 */
+		break;
+	case 2400000:
+		switch (dmic->fclk_freq) {
+		case 12000000:
+			divider = 0x5; /* Divider: 5 */
+			break;
+		case 19200000:
+			divider = 0x0; /* Divider: 8 */
+			break;
+		case 24000000:
+			divider = 0x2; /* Divider: 10 */
+			break;
+		default:
+			goto div_err;
+		}
+		break;
+	case 3072000:
+		if (dmic->fclk_freq != 24576000)
+			goto div_err;
+		divider = 0x3; /* Divider: 8 */
+		break;
+	case 3840000:
+		if (dmic->fclk_freq != 19200000)
+			goto div_err;
+		divider = 0x1; /* Divider: 5 (96KHz sampling rate) */
+		break;
+	default:
+		dev_err(dmic->dev, "invalid out frequency: %dHz\n",
+			dmic->out_freq);
+		break;
+	}
+
+	return divider;
+
+div_err:
+	dev_err(dmic->dev, "invalid out frequency %dHz for %dHz input\n",
+		dmic->out_freq, dmic->fclk_freq);
+	return -EINVAL;
+}
+
+static int omap_dmic_dai_hw_params(struct snd_pcm_substream *substream,
+				    struct snd_pcm_hw_params *params,
+				    struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+	int channels;
+
+	dmic->clk_div = omap_dmic_select_divider(dmic, params_rate(params));
+	if (dmic->clk_div < 0) {
+		dev_err(dmic->dev, "no valid divider for %dHz from %dHz\n",
+			dmic->out_freq, dmic->fclk_freq);
+		return -EINVAL;
+	}
+
+	dmic->ch_enabled = 0;
+	channels = params_channels(params);
+	switch (channels) {
+	case 6:
+		dmic->ch_enabled |= OMAP_DMIC_UP3_ENABLE;
+	case 4:
+		dmic->ch_enabled |= OMAP_DMIC_UP2_ENABLE;
+	case 2:
+		dmic->ch_enabled |= OMAP_DMIC_UP1_ENABLE;
+		break;
+	default:
+		dev_err(dmic->dev, "invalid number of legacy channels\n");
+		return -EINVAL;
+	}
+
+	/* packet size is threshold * channels */
+	omap_dmic_dai_dma_params.packet_size = dmic->threshold * channels;
+	snd_soc_dai_set_dma_data(dai, substream, &omap_dmic_dai_dma_params);
+
+	return 0;
+}
+
+static int omap_dmic_dai_prepare(struct snd_pcm_substream *substream,
+				  struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+	u32 ctrl;
+
+	/* Configure uplink threshold */
+	omap_dmic_write(dmic, OMAP_DMIC_FIFO_CTRL_REG, dmic->threshold);
+
+	ctrl = omap_dmic_read(dmic, OMAP_DMIC_CTRL_REG);
+
+	/* Set dmic out format */
+	ctrl &= ~(OMAP_DMIC_FORMAT | OMAP_DMIC_POLAR_MASK);
+	ctrl |= (OMAP_DMICOUTFORMAT_LJUST | OMAP_DMIC_POLAR1 |
+		 OMAP_DMIC_POLAR2 | OMAP_DMIC_POLAR3);
+
+	/* Configure dmic clock divider */
+	ctrl &= ~OMAP_DMIC_CLK_DIV_MASK;
+	ctrl |= OMAP_DMIC_CLK_DIV(dmic->clk_div);
+
+	omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, ctrl);
+
+	omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG,
+			ctrl | OMAP_DMICOUTFORMAT_LJUST | OMAP_DMIC_POLAR1 |
+			OMAP_DMIC_POLAR2 | OMAP_DMIC_POLAR3);
+
+	return 0;
+}
+
+static int omap_dmic_dai_trigger(struct snd_pcm_substream *substream,
+				  int cmd, struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		omap_dmic_start(dmic);
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		omap_dmic_stop(dmic);
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static int omap_dmic_select_fclk(struct omap_dmic *dmic, int clk_id,
+				 unsigned int freq)
+{
+	struct clk *parent_clk;
+	char *parent_clk_name;
+	int ret = 0;
+
+	switch (freq) {
+	case 12000000:
+	case 19200000:
+	case 24000000:
+	case 24576000:
+		break;
+	default:
+		dev_err(dmic->dev, "invalid input frequency: %dHz\n", freq);
+		dmic->fclk_freq = 0;
+		return -EINVAL;
+	}
+
+	if (dmic->sysclk == clk_id) {
+		dmic->fclk_freq = freq;
+		return 0;
+	}
+
+	/* re-parent not allowed if a stream is ongoing */
+	if (dmic->active && dmic_is_enabled(dmic)) {
+		dev_err(dmic->dev, "can't re-parent when DMIC active\n");
+		return -EBUSY;
+	}
+
+	switch (clk_id) {
+	case OMAP_DMIC_SYSCLK_PAD_CLKS:
+		parent_clk_name = "pad_clks_ck";
+		break;
+	case OMAP_DMIC_SYSCLK_SLIMBLUS_CLKS:
+		parent_clk_name = "slimbus_clk";
+		break;
+	case OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS:
+		parent_clk_name = "dmic_sync_mux_ck";
+		break;
+	default:
+		dev_err(dmic->dev, "fclk clk_id (%d) not supported\n", clk_id);
+		return -EINVAL;
+	}
+
+	parent_clk = clk_get(dmic->dev, parent_clk_name);
+	if (IS_ERR(parent_clk)) {
+		dev_err(dmic->dev, "can't get %s\n", parent_clk_name);
+		return -ENODEV;
+	}
+
+	mutex_lock(&dmic->mutex);
+	if (dmic->active) {
+		/* disable clock while reparenting */
+		pm_runtime_put_sync(dmic->dev);
+		ret = clk_set_parent(dmic->fclk, parent_clk);
+		pm_runtime_get_sync(dmic->dev);
+	} else {
+		ret = clk_set_parent(dmic->fclk, parent_clk);
+	}
+	mutex_unlock(&dmic->mutex);
+
+	if (ret < 0) {
+		dev_err(dmic->dev, "re-parent failed\n");
+		goto err_busy;
+	}
+
+	dmic->sysclk = clk_id;
+	dmic->fclk_freq = freq;
+
+err_busy:
+	clk_put(parent_clk);
+
+	return ret;
+}
+
+static int omap_dmic_select_outclk(struct omap_dmic *dmic, int clk_id,
+				    unsigned int freq)
+{
+	int ret = 0;
+
+	if (clk_id != OMAP_DMIC_ABE_DMIC_CLK) {
+		dev_err(dmic->dev, "output clk_id (%d) not supported\n",
+			clk_id);
+		return -EINVAL;
+	}
+
+	switch (freq) {
+	case 1536000:
+	case 2400000:
+	case 3072000:
+	case 3840000:
+		dmic->out_freq = freq;
+		break;
+	default:
+		dev_err(dmic->dev, "invalid out frequency: %dHz\n", freq);
+		dmic->out_freq = 0;
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int omap_dmic_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+				    unsigned int freq, int dir)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+	if (dir == SND_SOC_CLOCK_IN)
+		return omap_dmic_select_fclk(dmic, clk_id, freq);
+	else if (dir == SND_SOC_CLOCK_OUT)
+		return omap_dmic_select_outclk(dmic, clk_id, freq);
+
+	dev_err(dmic->dev, "invalid clock direction (%d)\n", dir);
+	return -EINVAL;
+}
+
+static const struct snd_soc_dai_ops omap_dmic_dai_ops = {
+	.startup	= omap_dmic_dai_startup,
+	.shutdown	= omap_dmic_dai_shutdown,
+	.hw_params	= omap_dmic_dai_hw_params,
+	.prepare	= omap_dmic_dai_prepare,
+	.trigger	= omap_dmic_dai_trigger,
+	.set_sysclk	= omap_dmic_set_dai_sysclk,
+};
+
+static int omap_dmic_probe(struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+	pm_runtime_enable(dmic->dev);
+
+	/* Disable lines while request is ongoing */
+	pm_runtime_get_sync(dmic->dev);
+	omap_dmic_write(dmic, OMAP_DMIC_CTRL_REG, 0x00);
+	pm_runtime_put_sync(dmic->dev);
+
+	/* Configure DMIC threshold value */
+	dmic->threshold = OMAP_DMIC_THRES_MAX - 3;
+	return 0;
+}
+
+static int omap_dmic_remove(struct snd_soc_dai *dai)
+{
+	struct omap_dmic *dmic = snd_soc_dai_get_drvdata(dai);
+
+	pm_runtime_disable(dmic->dev);
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver omap_dmic_dai = {
+	.name = "omap-dmic",
+	.probe = omap_dmic_probe,
+	.remove = omap_dmic_remove,
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 6,
+		.rates = SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE,
+	},
+	.ops = &omap_dmic_dai_ops,
+};
+
+static __devinit int asoc_dmic_probe(struct platform_device *pdev)
+{
+	struct omap_dmic *dmic;
+	struct resource *res;
+	int ret;
+
+	dmic = devm_kzalloc(&pdev->dev, sizeof(struct omap_dmic), GFP_KERNEL);
+	if (!dmic)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, dmic);
+	dmic->dev = &pdev->dev;
+	dmic->sysclk = OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS;
+
+	mutex_init(&dmic->mutex);
+
+	dmic->fclk = clk_get(dmic->dev, "dmic_fck");
+	if (IS_ERR(dmic->fclk)) {
+		dev_err(dmic->dev, "cant get dmic_fck\n");
+		return -ENODEV;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dma");
+	if (!res) {
+		dev_err(dmic->dev, "invalid dma memory resource\n");
+		ret = -ENODEV;
+		goto err_put_clk;
+	}
+	omap_dmic_dai_dma_params.port_addr = res->start + OMAP_DMIC_DATA_REG;
+
+	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!res) {
+		dev_err(dmic->dev, "invalid dma resource\n");
+		ret = -ENODEV;
+		goto err_put_clk;
+	}
+	omap_dmic_dai_dma_params.dma_req = res->start;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mpu");
+	if (!res) {
+		dev_err(dmic->dev, "invalid memory resource\n");
+		ret = -ENODEV;
+		goto err_put_clk;
+	}
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), pdev->name)) {
+		dev_err(dmic->dev, "memory region already claimed\n");
+		ret = -ENODEV;
+		goto err_put_clk;
+	}
+
+	dmic->io_base = devm_ioremap(&pdev->dev, res->start,
+				     resource_size(res));
+	if (!dmic->io_base) {
+		ret = -ENOMEM;
+		goto err_put_clk;
+	}
+
+	ret = snd_soc_register_dai(&pdev->dev, &omap_dmic_dai);
+	if (ret)
+		goto err_put_clk;
+
+	return 0;
+
+err_put_clk:
+	clk_put(dmic->fclk);
+	return ret;
+}
+
+static int __devexit asoc_dmic_remove(struct platform_device *pdev)
+{
+	struct omap_dmic *dmic = platform_get_drvdata(pdev);
+
+	snd_soc_unregister_dai(&pdev->dev);
+	clk_put(dmic->fclk);
+
+	return 0;
+}
+
+static struct platform_driver asoc_dmic_driver = {
+	.driver = {
+		.name = "omap-dmic",
+		.owner = THIS_MODULE,
+	},
+	.probe = asoc_dmic_probe,
+	.remove = __devexit_p(asoc_dmic_remove),
+};
+
+module_platform_driver(asoc_dmic_driver);
+
+MODULE_ALIAS("platform:omap-dmic");
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_DESCRIPTION("OMAP DMIC ASoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/omap/omap-dmic.h b/sound/soc/omap/omap-dmic.h
new file mode 100644
index 0000000..231e728
--- /dev/null
+++ b/sound/soc/omap/omap-dmic.h
@@ -0,0 +1,69 @@
+/*
+ * omap-dmic.h  --  OMAP Digital Microphone Controller
+ *
+ * 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 _OMAP_DMIC_H
+#define _OMAP_DMIC_H
+
+#define OMAP_DMIC_REVISION_REG		0x00
+#define OMAP_DMIC_SYSCONFIG_REG		0x10
+#define OMAP_DMIC_IRQSTATUS_RAW_REG	0x24
+#define OMAP_DMIC_IRQSTATUS_REG		0x28
+#define OMAP_DMIC_IRQENABLE_SET_REG	0x2C
+#define OMAP_DMIC_IRQENABLE_CLR_REG	0x30
+#define OMAP_DMIC_IRQWAKE_EN_REG	0x34
+#define OMAP_DMIC_DMAENABLE_SET_REG	0x38
+#define OMAP_DMIC_DMAENABLE_CLR_REG	0x3C
+#define OMAP_DMIC_DMAWAKEEN_REG		0x40
+#define OMAP_DMIC_CTRL_REG		0x44
+#define OMAP_DMIC_DATA_REG		0x48
+#define OMAP_DMIC_FIFO_CTRL_REG		0x4C
+#define OMAP_DMIC_FIFO_DMIC1R_DATA_REG	0x50
+#define OMAP_DMIC_FIFO_DMIC1L_DATA_REG	0x54
+#define OMAP_DMIC_FIFO_DMIC2R_DATA_REG	0x58
+#define OMAP_DMIC_FIFO_DMIC2L_DATA_REG	0x5C
+#define OMAP_DMIC_FIFO_DMIC3R_DATA_REG	0x60
+#define OMAP_DMIC_FIFO_DMIC3L_DATA_REG	0x64
+
+/* IRQSTATUS_RAW, IRQSTATUS, IRQENABLE_SET, IRQENABLE_CLR bit fields */
+#define OMAP_DMIC_IRQ			(1 << 0)
+#define OMAP_DMIC_IRQ_FULL		(1 << 1)
+#define OMAP_DMIC_IRQ_ALMST_EMPTY	(1 << 2)
+#define OMAP_DMIC_IRQ_EMPTY		(1 << 3)
+#define OMAP_DMIC_IRQ_MASK		0x07
+
+/* DMIC_DMAENABLE bit fields */
+#define OMAP_DMIC_DMA_ENABLE		0x1
+
+/* DMIC_CTRL bit fields */
+#define OMAP_DMIC_UP1_ENABLE		(1 << 0)
+#define OMAP_DMIC_UP2_ENABLE		(1 << 1)
+#define OMAP_DMIC_UP3_ENABLE		(1 << 2)
+#define OMAP_DMIC_UP_ENABLE_MASK	0x7
+#define OMAP_DMIC_FORMAT		(1 << 3)
+#define OMAP_DMIC_POLAR1		(1 << 4)
+#define OMAP_DMIC_POLAR2		(1 << 5)
+#define OMAP_DMIC_POLAR3		(1 << 6)
+#define OMAP_DMIC_POLAR_MASK		(0x7 << 4)
+#define OMAP_DMIC_CLK_DIV(x)		(((x) & 0x7) << 7)
+#define OMAP_DMIC_CLK_DIV_MASK		(0x7 << 7)
+#define	OMAP_DMIC_RESET			(1 << 10)
+
+#define OMAP_DMICOUTFORMAT_LJUST	(0 << 3)
+#define OMAP_DMICOUTFORMAT_RJUST	(1 << 3)
+
+/* DMIC_FIFO_CTRL bit fields */
+#define OMAP_DMIC_THRES_MAX		0xF
+
+enum omap_dmic_clk {
+	OMAP_DMIC_SYSCLK_PAD_CLKS,		/* PAD_CLKS */
+	OMAP_DMIC_SYSCLK_SLIMBLUS_CLKS,		/* SLIMBUS_CLK */
+	OMAP_DMIC_SYSCLK_SYNC_MUX_CLKS,		/* DMIC_SYNC_MUX_CLK */
+	OMAP_DMIC_ABE_DMIC_CLK,			/* abe_dmic_clk */
+};
+
+#endif
diff --git a/sound/soc/omap/omap-hdmi.c b/sound/soc/omap/omap-hdmi.c
index 36c6eae..38e0def 100644
--- a/sound/soc/omap/omap-hdmi.c
+++ b/sound/soc/omap/omap-hdmi.c
@@ -83,7 +83,7 @@ static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
 	return err;
 }
 
-static struct snd_soc_dai_ops omap_hdmi_dai_ops = {
+static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
 	.startup	= omap_hdmi_dai_startup,
 	.hw_params	= omap_hdmi_dai_hw_params,
 };
@@ -139,17 +139,7 @@ static struct platform_driver hdmi_dai_driver = {
 	.remove = __devexit_p(omap_hdmi_remove),
 };
 
-static int __init hdmi_dai_init(void)
-{
-	return platform_driver_register(&hdmi_dai_driver);
-}
-module_init(hdmi_dai_init);
-
-static void __exit hdmi_dai_exit(void)
-{
-	platform_driver_unregister(&hdmi_dai_driver);
-}
-module_exit(hdmi_dai_exit);
+module_platform_driver(hdmi_dai_driver);
 
 MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>");
 MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
diff --git a/sound/soc/omap/omap-mcbsp.c b/sound/soc/omap/omap-mcbsp.c
index 4314647..0173719 100644
--- a/sound/soc/omap/omap-mcbsp.c
+++ b/sound/soc/omap/omap-mcbsp.c
@@ -258,7 +258,7 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 	default:
 		return -EINVAL;
 	}
-	if (cpu_is_omap34xx()) {
+	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
 		dma_data->set_threshold = omap_mcbsp_set_threshold;
 		/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
 		if (omap_mcbsp_get_dma_op_mode(bus_id) ==
@@ -599,7 +599,7 @@ static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 	return err;
 }
 
-static struct snd_soc_dai_ops mcbsp_dai_ops = {
+static const struct snd_soc_dai_ops mcbsp_dai_ops = {
 	.startup	= omap_mcbsp_dai_startup,
 	.shutdown	= omap_mcbsp_dai_shutdown,
 	.trigger	= omap_mcbsp_dai_trigger,
@@ -785,17 +785,7 @@ static struct platform_driver asoc_mcbsp_driver = {
 	.remove = __devexit_p(asoc_mcbsp_remove),
 };
 
-static int __init snd_omap_mcbsp_init(void)
-{
-	return platform_driver_register(&asoc_mcbsp_driver);
-}
-module_init(snd_omap_mcbsp_init);
-
-static void __exit snd_omap_mcbsp_exit(void)
-{
-	platform_driver_unregister(&asoc_mcbsp_driver);
-}
-module_exit(snd_omap_mcbsp_exit);
+module_platform_driver(asoc_mcbsp_driver);
 
 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index 41d1706..0e25df4 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -266,8 +266,6 @@ static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
 	mutex_lock(&mcpdm->mutex);
 
 	if (!dai->active) {
-		pm_runtime_get_sync(mcpdm->dev);
-
 		/* Enable watch dog for ES above ES 1.0 to avoid saturation */
 		if (omap_rev() != OMAP4430_REV_ES1_0) {
 			u32 ctrl = omap_mcpdm_read(mcpdm, MCPDM_REG_CTRL);
@@ -295,9 +293,6 @@ static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
 			omap_mcpdm_stop(mcpdm);
 			omap_mcpdm_close_streams(mcpdm);
 		}
-
-		if (!omap_mcpdm_active(mcpdm))
-			pm_runtime_put_sync(mcpdm->dev);
 	}
 
 	mutex_unlock(&mcpdm->mutex);
@@ -367,7 +362,7 @@ static int omap_mcpdm_prepare(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
+static const struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
 	.startup	= omap_mcpdm_dai_startup,
 	.shutdown	= omap_mcpdm_dai_shutdown,
 	.hw_params	= omap_mcpdm_dai_hw_params,
@@ -520,17 +515,7 @@ static struct platform_driver asoc_mcpdm_driver = {
 	.remove	= __devexit_p(asoc_mcpdm_remove),
 };
 
-static int __init snd_omap_mcpdm_init(void)
-{
-	return platform_driver_register(&asoc_mcpdm_driver);
-}
-module_init(snd_omap_mcpdm_init);
-
-static void __exit snd_omap_mcpdm_exit(void)
-{
-	platform_driver_unregister(&asoc_mcpdm_driver);
-}
-module_exit(snd_omap_mcpdm_exit);
+module_platform_driver(asoc_mcpdm_driver);
 
 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 MODULE_DESCRIPTION("OMAP PDM SoC Interface");
diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
index 6ede7dc..a59bd35 100644
--- a/sound/soc/omap/omap-pcm.c
+++ b/sound/soc/omap/omap-pcm.c
@@ -378,7 +378,6 @@ static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm)
 static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_card *card = rtd->card->snd_card;
-	struct snd_soc_dai *dai = rtd->cpu_dai;
 	struct snd_pcm *pcm = rtd->pcm;
 	int ret = 0;
 
@@ -387,14 +386,14 @@ static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
 	if (!card->dev->coherent_dma_mask)
 		card->dev->coherent_dma_mask = DMA_BIT_MASK(64);
 
-	if (dai->driver->playback.channels_min) {
+	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
 		ret = omap_pcm_preallocate_dma_buffer(pcm,
 			SNDRV_PCM_STREAM_PLAYBACK);
 		if (ret)
 			goto out;
 	}
 
-	if (dai->driver->capture.channels_min) {
+	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 		ret = omap_pcm_preallocate_dma_buffer(pcm,
 			SNDRV_PCM_STREAM_CAPTURE);
 		if (ret)
@@ -433,17 +432,7 @@ static struct platform_driver omap_pcm_driver = {
 	.remove = __devexit_p(omap_pcm_remove),
 };
 
-static int __init snd_omap_pcm_init(void)
-{
-	return platform_driver_register(&omap_pcm_driver);
-}
-module_init(snd_omap_pcm_init);
-
-static void __exit snd_omap_pcm_exit(void)
-{
-	platform_driver_unregister(&omap_pcm_driver);
-}
-module_exit(snd_omap_pcm_exit);
+module_platform_driver(omap_pcm_driver);
 
 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
 MODULE_DESCRIPTION("OMAP PCM DMA module");
diff --git a/sound/soc/omap/omap3evm.c b/sound/soc/omap/omap3evm.c
index 6857895..071fcb0 100644
--- a/sound/soc/omap/omap3evm.c
+++ b/sound/soc/omap/omap3evm.c
@@ -70,6 +70,7 @@ static struct snd_soc_dai_link omap3evm_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_omap3evm = {
 	.name = "omap3evm",
+	.owner = THIS_MODULE,
 	.dai_link = &omap3evm_dai,
 	.num_links = 1,
 };
diff --git a/sound/soc/omap/omap3pandora.c b/sound/soc/omap/omap3pandora.c
index 7605c37..07794bd 100644
--- a/sound/soc/omap/omap3pandora.c
+++ b/sound/soc/omap/omap3pandora.c
@@ -233,6 +233,7 @@ static struct snd_soc_dai_link omap3pandora_dai[] = {
 /* SoC card */
 static struct snd_soc_card snd_soc_card_omap3pandora = {
 	.name = "omap3pandora",
+	.owner = THIS_MODULE,
 	.dai_link = omap3pandora_dai,
 	.num_links = ARRAY_SIZE(omap3pandora_dai),
 };
diff --git a/sound/soc/omap/omap4-hdmi-card.c b/sound/soc/omap/omap4-hdmi-card.c
index 8671261..28d689b 100644
--- a/sound/soc/omap/omap4-hdmi-card.c
+++ b/sound/soc/omap/omap4-hdmi-card.c
@@ -74,6 +74,7 @@ static struct snd_soc_dai_link omap4_hdmi_dai = {
 
 static struct snd_soc_card snd_soc_omap4_hdmi = {
 	.name = "OMAP4HDMI",
+	.owner = THIS_MODULE,
 	.dai_link = &omap4_hdmi_dai,
 	.num_links = 1,
 };
@@ -112,17 +113,7 @@ static struct platform_driver omap4_hdmi_driver = {
 	.remove = __devexit_p(omap4_hdmi_remove),
 };
 
-static int __init omap4_hdmi_init(void)
-{
-	return platform_driver_register(&omap4_hdmi_driver);
-}
-module_init(omap4_hdmi_init);
-
-static void __exit omap4_hdmi_exit(void)
-{
-	platform_driver_unregister(&omap4_hdmi_driver);
-}
-module_exit(omap4_hdmi_exit);
+module_platform_driver(omap4_hdmi_driver);
 
 MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
 MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver");
diff --git a/sound/soc/omap/osk5912.c b/sound/soc/omap/osk5912.c
index 351ec9d..d859b59 100644
--- a/sound/soc/omap/osk5912.c
+++ b/sound/soc/omap/osk5912.c
@@ -108,6 +108,7 @@ static struct snd_soc_dai_link osk_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_card_osk = {
 	.name = "OSK5912",
+	.owner = THIS_MODULE,
 	.dai_link = &osk_dai,
 	.num_links = 1,
 
diff --git a/sound/soc/omap/overo.c b/sound/soc/omap/overo.c
index c3550ae..2ee889c 100644
--- a/sound/soc/omap/overo.c
+++ b/sound/soc/omap/overo.c
@@ -72,6 +72,7 @@ static struct snd_soc_dai_link overo_dai = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_card_overo = {
 	.name = "overo",
+	.owner = THIS_MODULE,
 	.dai_link = &overo_dai,
 	.num_links = 1,
 };
diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
index 4cabb74..fada6ef 100644
--- a/sound/soc/omap/rx51.c
+++ b/sound/soc/omap/rx51.c
@@ -365,7 +365,7 @@ static struct snd_soc_dai_link rx51_dai[] = {
 	},
 };
 
-struct snd_soc_aux_dev rx51_aux_dev[] = {
+static struct snd_soc_aux_dev rx51_aux_dev[] = {
 	{
 		.name = "TLV320AIC34b",
 		.codec_name = "tlv320aic3x-codec.2-0019",
@@ -383,6 +383,7 @@ static struct snd_soc_codec_conf rx51_codec_conf[] = {
 /* Audio card */
 static struct snd_soc_card rx51_sound_card = {
 	.name = "RX-51",
+	.owner = THIS_MODULE,
 	.dai_link = rx51_dai,
 	.num_links = ARRAY_SIZE(rx51_dai),
 	.aux_dev = rx51_aux_dev,
diff --git a/sound/soc/omap/sdp3430.c b/sound/soc/omap/sdp3430.c
index e8fbf8e..2c85066 100644
--- a/sound/soc/omap/sdp3430.c
+++ b/sound/soc/omap/sdp3430.c
@@ -213,6 +213,7 @@ static struct snd_soc_dai_link sdp3430_dai[] = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_sdp3430 = {
 	.name = "SDP3430",
+	.owner = THIS_MODULE,
 	.dai_link = sdp3430_dai,
 	.num_links = ARRAY_SIZE(sdp3430_dai),
 
diff --git a/sound/soc/omap/sdp4430.c b/sound/soc/omap/sdp4430.c
index 03d9fa4..175ba9a 100644
--- a/sound/soc/omap/sdp4430.c
+++ b/sound/soc/omap/sdp4430.c
@@ -33,6 +33,7 @@
 #include <plat/hardware.h>
 #include <plat/mux.h>
 
+#include "omap-dmic.h"
 #include "omap-mcpdm.h"
 #include "omap-pcm.h"
 #include "../codecs/twl6040.h"
@@ -67,6 +68,32 @@ static struct snd_soc_ops sdp4430_ops = {
 	.hw_params = sdp4430_hw_params,
 };
 
+static int sdp4430_dmic_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;
+	int ret = 0;
+
+	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_SYSCLK_PAD_CLKS,
+				     19200000, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		printk(KERN_ERR "can't set DMIC cpu system clock\n");
+		return ret;
+	}
+	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_DMIC_ABE_DMIC_CLK, 2400000,
+				     SND_SOC_CLOCK_OUT);
+	if (ret < 0) {
+		printk(KERN_ERR "can't set DMIC output clock\n");
+		return ret;
+	}
+	return 0;
+}
+
+static struct snd_soc_ops sdp4430_dmic_ops = {
+	.hw_params = sdp4430_dmic_hw_params,
+};
+
 /* Headset jack */
 static struct snd_soc_jack hs_jack;
 
@@ -148,23 +175,60 @@ static int sdp4430_twl6040_init(struct snd_soc_pcm_runtime *rtd)
 	return ret;
 }
 
+static const struct snd_soc_dapm_widget sdp4430_dmic_dapm_widgets[] = {
+	SND_SOC_DAPM_MIC("Digital Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route dmic_audio_map[] = {
+	{"DMic", NULL, "Digital Mic1 Bias"},
+	{"Digital Mic1 Bias", NULL, "Digital Mic"},
+};
+
+static int sdp4430_dmic_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	int ret;
+
+	ret = snd_soc_dapm_new_controls(dapm, sdp4430_dmic_dapm_widgets,
+				ARRAY_SIZE(sdp4430_dmic_dapm_widgets));
+	if (ret)
+		return ret;
+
+	return snd_soc_dapm_add_routes(dapm, dmic_audio_map,
+				ARRAY_SIZE(dmic_audio_map));
+}
+
 /* Digital audio interface glue - connects codec <--> CPU */
-static struct snd_soc_dai_link sdp4430_dai = {
-	.name = "TWL6040",
-	.stream_name = "TWL6040",
-	.cpu_dai_name = "omap-mcpdm",
-	.codec_dai_name = "twl6040-legacy",
-	.platform_name = "omap-pcm-audio",
-	.codec_name = "twl6040-codec",
-	.init = sdp4430_twl6040_init,
-	.ops = &sdp4430_ops,
+static struct snd_soc_dai_link sdp4430_dai[] = {
+	{
+		.name = "TWL6040",
+		.stream_name = "TWL6040",
+		.cpu_dai_name = "omap-mcpdm",
+		.codec_dai_name = "twl6040-legacy",
+		.platform_name = "omap-pcm-audio",
+		.codec_name = "twl6040-codec",
+		.init = sdp4430_twl6040_init,
+		.ops = &sdp4430_ops,
+	},
+	{
+		.name = "DMIC",
+		.stream_name = "DMIC Capture",
+		.cpu_dai_name = "omap-dmic",
+		.codec_dai_name = "dmic-hifi",
+		.platform_name = "omap-pcm-audio",
+		.codec_name = "dmic-codec",
+		.init = sdp4430_dmic_init,
+		.ops = &sdp4430_dmic_ops,
+	},
 };
 
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_sdp4430 = {
 	.name = "SDP4430",
-	.dai_link = &sdp4430_dai,
-	.num_links = 1,
+	.owner = THIS_MODULE,
+	.dai_link = sdp4430_dai,
+	.num_links = ARRAY_SIZE(sdp4430_dai),
 
 	.dapm_widgets = sdp4430_twl6040_dapm_widgets,
 	.num_dapm_widgets = ARRAY_SIZE(sdp4430_twl6040_dapm_widgets),
diff --git a/sound/soc/omap/zoom2.c b/sound/soc/omap/zoom2.c
index 7641a7f..981616d 100644
--- a/sound/soc/omap/zoom2.c
+++ b/sound/soc/omap/zoom2.c
@@ -157,6 +157,7 @@ static struct snd_soc_dai_link zoom2_dai[] = {
 /* Audio machine driver */
 static struct snd_soc_card snd_soc_zoom2 = {
 	.name = "Zoom2",
+	.owner = THIS_MODULE,
 	.dai_link = zoom2_dai,
 	.num_links = ARRAY_SIZE(zoom2_dai),