[patch 1/2] alsa: ASoC driver for s6000 I2S interface

["Daniel Glöckner" <dg@emlix.com>]

This patch adds a driver for the I2S interface found on Stretch s6000
family processors.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
---
 sound/soc/Kconfig           |    1 +
 sound/soc/Makefile          |    1 +
 sound/soc/s6000/Kconfig     |   10 +
 sound/soc/s6000/Makefile    |    6 +
 sound/soc/s6000/s6000-i2s.c |  421 +++++++++++++++++++++++++++++++++++
 sound/soc/s6000/s6000-i2s.h |  167 ++++++++++++++
 sound/soc/s6000/s6000-pcm.c |  518 +++++++++++++++++++++++++++++++++++++++++++
 sound/soc/s6000/s6000-pcm.h |   41 ++++
 8 files changed, 1165 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/s6000/Kconfig
 create mode 100644 sound/soc/s6000/Makefile
 create mode 100644 sound/soc/s6000/s6000-i2s.c
 create mode 100644 sound/soc/s6000/s6000-i2s.h
 create mode 100644 sound/soc/s6000/s6000-pcm.c
 create mode 100644 sound/soc/s6000/s6000-pcm.h

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index ef025c6..56e5198 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -31,6 +31,7 @@ source "sound/soc/fsl/Kconfig"
 source "sound/soc/omap/Kconfig"
 source "sound/soc/pxa/Kconfig"
 source "sound/soc/s3c24xx/Kconfig"
+source "sound/soc/s6000/Kconfig"
 source "sound/soc/sh/Kconfig"
 
 # Supported codecs
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 86a9b1f..6b33d80 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_SND_SOC)	+= fsl/
 obj-$(CONFIG_SND_SOC)	+= omap/
 obj-$(CONFIG_SND_SOC)	+= pxa/
 obj-$(CONFIG_SND_SOC)	+= s3c24xx/
+obj-$(CONFIG_SND_SOC)	+= s6000/
 obj-$(CONFIG_SND_SOC)	+= sh/
diff --git a/sound/soc/s6000/Kconfig b/sound/soc/s6000/Kconfig
new file mode 100644
index 0000000..5612ed2
--- /dev/null
+++ b/sound/soc/s6000/Kconfig
@@ -0,0 +1,10 @@
+config SND_S6000_SOC
+	tristate "SoC Audio for the Stretch s6000 family"
+	depends on XTENSA_VARIANT_S6000 && SND_SOC
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  s6000 family chips. You will also need to select the platform
+	  to support below.
+
+config SND_S6000_SOC_I2S
+	tristate
diff --git a/sound/soc/s6000/Makefile b/sound/soc/s6000/Makefile
new file mode 100644
index 0000000..df15f87
--- /dev/null
+++ b/sound/soc/s6000/Makefile
@@ -0,0 +1,6 @@
+# s6000 Platform Support
+snd-soc-s6000-objs := s6000-pcm.o
+snd-soc-s6000-i2s-objs := s6000-i2s.o
+
+obj-$(CONFIG_SND_S6000_SOC) += snd-soc-s6000.o
+obj-$(CONFIG_SND_S6000_SOC_I2S) += snd-soc-s6000-i2s.o
diff --git a/sound/soc/s6000/s6000-i2s.c b/sound/soc/s6000/s6000-i2s.c
new file mode 100644
index 0000000..719a3c4
--- /dev/null
+++ b/sound/soc/s6000/s6000-i2s.c
@@ -0,0 +1,421 @@
+/*
+ * ALSA SoC I2S Audio Layer for the Stretch S6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.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/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "s6000-i2s.h"
+#include "s6000-pcm.h"
+
+static void s6000_i2s_wait_disabled(struct s6000_i2s_dev *dev)
+{
+	int channel;
+	int n = 50;
+	for (channel = 0; channel < 2; channel++) {
+		while (--n >= 0) {
+			int v = s6_i2s_read_reg(dev, S6_I2S_ENABLE(channel));
+			if ((v & S6_I2S_IS_ENABLED)
+			    || !(v & (S6_I2S_DMA_ACTIVE | S6_I2S_IS_BUSY)))
+				break;
+			udelay(20);
+		}
+	}
+	if (n < 0)
+		printk(KERN_WARNING "s6000-i2s: timeout disabling interfaces");
+}
+
+static int s6000_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+				   unsigned int fmt)
+{
+	struct s6000_i2s_dev *dev = cpu_dai->private_data;
+	u32 w;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		w = S6_I2S_SCK_IN | S6_I2S_WS_IN;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFM:
+		w = S6_I2S_SCK_OUT | S6_I2S_WS_IN;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		w = S6_I2S_SCK_IN | S6_I2S_WS_OUT;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		w = S6_I2S_SCK_OUT | S6_I2S_WS_OUT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_IB_IF:
+		w |= S6_I2S_LEFT_FIRST;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		w |= S6_I2S_RIGHT_FIRST;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(0),
+		       S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
+	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(1),
+		       S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
+
+	return 0;
+}
+
+static int s6000_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
+{
+	struct s6000_i2s_dev *dev = dai->private_data;
+
+	if (!div || (div & 1) || div > (S6_I2S_DIV_MASK + 1) * 2)
+		return -EINVAL;
+
+	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(div_id),
+		       S6_I2S_DIV_MASK, div / 2 - 1);
+	return 0;
+}
+
+static int s6000_i2s_hw_params(struct snd_pcm_substream *substream,
+			       struct snd_pcm_hw_params *params,
+			       struct snd_soc_dai *dai)
+{
+	struct s6000_i2s_dev *dev = dai->private_data;
+	int interf;
+	u32 w = 0;
+
+	if (dev->wide)
+		interf = 0;
+	else {
+		w |= (((params_channels(params) - 2) / 2)
+		      << S6_I2S_CHANNELS_SHIFT) & S6_I2S_CHANNELS_MASK;
+		interf = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+				? dev->channel_out : dev->channel_in;
+	}
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		w |= S6_I2S_16BIT | S6_I2S_MEM_16BIT;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		w |= S6_I2S_32BIT | S6_I2S_MEM_32BIT;
+		break;
+	default:
+		printk(KERN_WARNING "s6000-i2s: unsupported PCM format %x\n",
+		       params_format(params));
+		return -EINVAL;
+	}
+
+	if (s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(interf))
+	     & S6_I2S_IS_ENABLED) {
+		printk(KERN_ERR "s6000-i2s: interface already enabled\n");
+		return -EBUSY;
+	}
+
+	s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(interf),
+		       S6_I2S_CHANNELS_MASK|S6_I2S_MEM_MASK|S6_I2S_BITS_MASK,
+		       w);
+
+	return 0;
+}
+
+static int __devinit s6000_i2s_probe(struct platform_device *pdev,
+				     struct snd_soc_dai *dai)
+{
+	struct s6000_i2s_dev *dev;
+	struct resource *scbmem, *sifmem, *region, *dma_in, *dma_out;
+	struct s6000_snd_platform_data *pdata;
+	u8 __iomem *mmio;
+	int ret;
+
+	pdata = pdev->dev.platform_data;
+
+	scbmem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!scbmem) {
+		dev_err(&pdev->dev, "no mem resource?\n");
+		ret = -ENODEV;
+		goto err_release_none;
+	}
+
+	region = request_mem_region(scbmem->start,
+				    scbmem->end - scbmem->start + 1,
+				    pdev->name);
+	if (!region) {
+		dev_err(&pdev->dev, "I2S SCB region already claimed\n");
+		ret = -EBUSY;
+		goto err_release_none;
+	}
+
+	mmio = ioremap(scbmem->start, scbmem->end - scbmem->start + 1);
+	if (!mmio) {
+		dev_err(&pdev->dev, "can't ioremap SCB region\n");
+		ret = -ENOMEM;
+		goto err_release_scb;
+	}
+
+	sifmem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!sifmem) {
+		dev_err(&pdev->dev, "no second mem resource?\n");
+		ret = -ENODEV;
+		goto err_release_map;
+	}
+
+	region = request_mem_region(sifmem->start,
+				    sifmem->end - sifmem->start + 1,
+				    pdev->name);
+	if (!region) {
+		dev_err(&pdev->dev, "I2S SIF region already claimed\n");
+		ret = -EBUSY;
+		goto err_release_map;
+	}
+
+	dma_in = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (!dma_in) {
+		dev_err(&pdev->dev, "no dma resource?\n");
+		ret = -ENODEV;
+		goto err_release_sif;
+	}
+
+	region = request_mem_region(dma_in->start,
+				    dma_in->end - dma_in->start + 1,
+				    pdev->name);
+	if (!region) {
+		dev_err(&pdev->dev, "I2S DMA region already claimed\n");
+		ret = -EBUSY;
+		goto err_release_sif;
+	}
+
+	dma_out = 0;
+	if (pdata->lines_out) {
+		if (pdata->lines_in) {
+			dma_out = platform_get_resource(pdev, IORESOURCE_DMA,
+							1);
+			if (!dma_out) {
+				dev_err(&pdev->dev,
+					"no second dma resource?\n");
+				ret = -ENODEV;
+				goto err_release_dma1;
+			}
+
+			region = request_mem_region(dma_out->start,
+						    dma_out->end
+						     - dma_out->start + 1,
+						    pdev->name);
+			if (!region) {
+				dev_err(&pdev->dev,
+					"I2S DMA region already claimed\n");
+				ret = -EBUSY;
+				goto err_release_dma1;
+			}
+		} else {
+			dma_out = dma_in;
+			dma_in = 0;
+		}
+	}
+
+	dev = kzalloc(sizeof(struct s6000_i2s_dev), GFP_KERNEL);
+	if (!dev) {
+		ret = -ENOMEM;
+		goto err_release_dma2;
+	}
+
+	dai->private_data = dev;
+	dai->dma_data = &dev->dma_params;
+
+	dev->sifbase = sifmem->start;
+	dev->scbbase = mmio;
+
+	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
+	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR,
+			 S6_I2S_INT_ALIGNMENT |
+			 S6_I2S_INT_UNDERRUN |
+			 S6_I2S_INT_OVERRUN);
+
+	s6000_i2s_stop_channel(dev, 0);
+	s6000_i2s_stop_channel(dev, 1);
+	s6000_i2s_wait_disabled(dev);
+
+	dev->wide = pdata->wide;
+	dev->channel_in = pdata->channel_in;
+	dev->channel_out = pdata->channel_out;
+	dev->lines_in = pdata->lines_in;
+	dev->lines_out = pdata->lines_out;
+
+	s6_i2s_write_reg(dev, S6_I2S_MODE,
+			 dev->wide ? S6_I2S_WIDE : S6_I2S_DUAL);
+
+	if (dev->wide) {
+		int i;
+		dev->channel_in = 0;
+		dev->channel_out = 1;
+		dai->capture.channels_min = 2 * dev->lines_in;
+		dai->capture.channels_max = dai->capture.channels_min;
+		dai->playback.channels_min = 2 * dev->lines_out;
+		dai->playback.channels_max = dai->playback.channels_min;
+
+		for (i = 0; i < dev->lines_out; i++)
+			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_OUT);
+
+		for (; i < S6_I2S_NUM_LINES - dev->lines_in; i++)
+			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i),
+					 S6_I2S_UNUSED);
+
+		for (; i < S6_I2S_NUM_LINES; i++)
+			s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_IN);
+	} else {
+		unsigned int cfg[2] = {S6_I2S_UNUSED, S6_I2S_UNUSED};
+
+		dev->lines_in = (dev->lines_in != 0);
+		dev->lines_out = (dev->lines_out != 0);
+		dai->capture.channels_min = 2 * dev->lines_in;
+		dai->capture.channels_max = 8 * dev->lines_in;
+		dai->playback.channels_min = 2 * dev->lines_out;
+		dai->playback.channels_max = 8 * dev->lines_out;
+
+		cfg[dev->channel_in] = S6_I2S_IN;
+		cfg[dev->channel_out] = S6_I2S_OUT;
+
+		s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(0), cfg[0]);
+		s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(1), cfg[1]);
+	}
+
+	dev->dma_params.dma_in = dma_in ? dma_in->start : 0;
+	dev->dma_params.dma_out = dma_out ? dma_out->start : 0;
+	dev->dma_params.sif_in = dev->sifbase + (dev->channel_in ?
+					S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
+	dev->dma_params.sif_out = dev->sifbase + (dev->channel_out ?
+					S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
+	dev->dma_params.same_rate = pdata->same_rate | pdata->wide;
+
+	dev->dma_params.irq = platform_get_irq(pdev, 0);
+	if (dev->dma_params.irq < 0) {
+		dev_err(&pdev->dev, "no irq resource?\n");
+		ret = -ENODEV;
+		goto err_release_dev;
+	}
+
+	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE,
+			 S6_I2S_INT_ALIGNMENT |
+			 S6_I2S_INT_UNDERRUN |
+			 S6_I2S_INT_OVERRUN);
+
+	return 0;
+
+err_release_dev:
+	kfree(dev);
+err_release_dma2:
+	if (dma_out)
+		release_mem_region(dma_out->start,
+				   dma_out->end - dma_out->start + 1);
+err_release_dma1:
+	if (dma_in)
+		release_mem_region(dma_in->start,
+				   dma_in->end - dma_in->start + 1);
+err_release_sif:
+	release_mem_region(sifmem->start, (sifmem->end - sifmem->start) + 1);
+err_release_map:
+	iounmap(mmio);
+err_release_scb:
+	release_mem_region(scbmem->start, (scbmem->end - scbmem->start) + 1);
+err_release_none:
+	return ret;
+}
+
+static void __devexit s6000_i2s_remove(struct platform_device *pdev,
+				       struct snd_soc_dai *dai)
+{
+	struct s6000_i2s_dev *dev = dai->private_data;
+	struct resource *region;
+	void __iomem *mmio = dev->scbbase;
+
+	s6000_i2s_stop_channel(dev, 0);
+	s6000_i2s_stop_channel(dev, 1);
+	kfree(dev);
+	dai->private_data = 0;
+
+	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
+
+	region = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	release_region(region->start, region->end - region->start + 1);
+
+	if (dev->lines_in && dev->lines_out) {
+		region = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+		release_region(region->start, region->end - region->start + 1);
+	}
+
+	region = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	release_region(region->start, (region->end - region->start) + 1);
+
+	iounmap(mmio);
+	region = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	release_mem_region(region->start, (region->end - region->start) + 1);
+}
+
+#define S6000_I2S_RATES	(SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT | \
+			 SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_192000)
+#define S6000_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+struct snd_soc_dai s6000_i2s_dai = {
+	.name = "s6000-i2s",
+	.id = 0,
+	.probe = s6000_i2s_probe,
+	.remove = __devexit_p(s6000_i2s_remove),
+	.playback = {
+		.channels_min = 2,
+		.channels_max = 8,
+		.formats = S6000_I2S_FORMATS,
+		.rates = S6000_I2S_RATES,
+		.rate_min = 0,
+		.rate_max = 1562500,
+	},
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 8,
+		.formats = S6000_I2S_FORMATS,
+		.rates = S6000_I2S_RATES,
+		.rate_min = 0,
+		.rate_max = 1562500,
+	},
+	.ops = {
+		.set_fmt = s6000_i2s_set_dai_fmt,
+		.set_clkdiv = s6000_i2s_set_clkdiv,
+		.hw_params = s6000_i2s_hw_params,
+	}
+}
+EXPORT_SYMBOL_GPL(s6000_i2s_dai);
+
+static int __init s6000_i2s_init(void)
+{
+	return snd_soc_register_dai(&s6000_i2s_dai);
+}
+module_init(s6000_i2s_init);
+
+static void __exit s6000_i2s_exit(void)
+{
+	snd_soc_unregister_dai(&s6000_i2s_dai);
+}
+module_exit(s6000_i2s_exit);
+
+MODULE_AUTHOR("Daniel Gloeckner");
+MODULE_DESCRIPTION("Stretch s6000 family I2S SoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/s6000/s6000-i2s.h b/sound/soc/s6000/s6000-i2s.h
new file mode 100644
index 0000000..4918f95
--- /dev/null
+++ b/sound/soc/s6000/s6000-i2s.h
@@ -0,0 +1,167 @@
+/*
+ * ALSA SoC I2S Audio Layer for the Stretch s6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.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 _S6000_I2S_H
+#define _S6000_I2S_H
+
+#include <linux/io.h>
+#include "s6000-pcm.h"
+
+extern struct snd_soc_dai s6000_i2s_dai;
+
+struct s6000_i2s_dev {
+	dma_addr_t sifbase;
+	u8 __iomem *scbbase;
+	int wide;
+	int channel_in;
+	int channel_out;
+	int lines_in;
+	int lines_out;
+	struct s6000_pcm_dma_params dma_params;
+};
+
+#define S6_I2S_INTERRUPT_STATUS	0x00
+#define   S6_I2S_INT_OVERRUN	1
+#define   S6_I2S_INT_UNDERRUN   2
+#define   S6_I2S_INT_ALIGNMENT  4
+#define S6_I2S_INTERRUPT_ENABLE	0x04
+#define S6_I2S_INTERRUPT_RAW	0x08
+#define S6_I2S_INTERRUPT_CLEAR	0x0C
+#define	S6_I2S_INTERRUPT_SET	0x10
+#define S6_I2S_MODE		0x20
+#define   S6_I2S_DUAL		0
+#define   S6_I2S_WIDE		1
+#define S6_I2S_TX_DEFAULT	0x24
+#define S6_I2S_DATA_CFG(c)	(0x40 + 0x10 * (c))
+#define   S6_I2S_IN		0
+#define   S6_I2S_OUT		1
+#define   S6_I2S_UNUSED		2
+#define S6_I2S_INTERFACE_CFG(c)	(0x44 + 0x10 * (c))
+#define   S6_I2S_DIV_MASK	0x001fff
+#define   S6_I2S_16BIT		0x000000
+#define   S6_I2S_20BIT		0x002000
+#define   S6_I2S_24BIT		0x004000
+#define   S6_I2S_32BIT		0x006000
+#define   S6_I2S_BITS_MASK	0x006000
+#define   S6_I2S_MEM_16BIT	0x000000
+#define   S6_I2S_MEM_32BIT	0x008000
+#define   S6_I2S_MEM_MASK	0x008000
+#define   S6_I2S_CHANNELS_SHIFT	16
+#define   S6_I2S_CHANNELS_MASK	0x030000
+#define   S6_I2S_SCK_IN		0x000000
+#define   S6_I2S_SCK_OUT	0x040000
+#define   S6_I2S_SCK_DIR	0x040000
+#define   S6_I2S_WS_IN		0x000000
+#define   S6_I2S_WS_OUT		0x080000
+#define   S6_I2S_WS_DIR		0x080000
+#define   S6_I2S_LEFT_FIRST	0x000000
+#define   S6_I2S_RIGHT_FIRST	0x100000
+#define   S6_I2S_FIRST		0x100000
+#define   S6_I2S_CUR_SCK	0x200000
+#define   S6_I2S_CUR_WS		0x400000
+#define S6_I2S_ENABLE(c)	(0x48 + 0x10 * (c))
+#define   S6_I2S_DISABLE_IF	0x02
+#define   S6_I2S_ENABLE_IF	0x03
+#define   S6_I2S_IS_BUSY	0x04
+#define   S6_I2S_DMA_ACTIVE	0x08
+#define   S6_I2S_IS_ENABLED	0x10
+
+#define S6_I2S_NUM_LINES	4
+
+#define S6_I2S_SIF_PORT0	0x0000000
+#define S6_I2S_SIF_PORT1	0x0000080 /* docs say 0x0000010 */
+
+static inline void s6_i2s_write_reg(struct s6000_i2s_dev *dev, int reg, u32 val)
+{
+	writel(val, dev->scbbase + reg);
+}
+
+static inline u32 s6_i2s_read_reg(struct s6000_i2s_dev *dev, int reg)
+{
+	return readl(dev->scbbase + reg);
+}
+
+static inline void s6_i2s_mod_reg(struct s6000_i2s_dev *dev, int reg,
+				  u32 mask, u32 val)
+{
+	val ^= s6_i2s_read_reg(dev, reg) & ~mask;
+	s6_i2s_write_reg(dev, reg, val);
+}
+
+static inline void s6000_i2s_start_channel(struct s6000_i2s_dev *dev,
+					   int channel)
+{
+	int i, j, cur, prev;
+
+	/*
+	 * Wait for WCLK to toggle 5 times before enabling the channel
+	 * s6000 Family Datasheet 3.6.4:
+	 *   "At least two cycles of WS must occur between commands
+	 *    to disable or enable the interface"
+	 */
+	j = 0;
+	prev = ~S6_I2S_CUR_WS;
+	for (i = 1000000; --i && j < 6; ) {
+		cur = s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(channel))
+		       & S6_I2S_CUR_WS;
+		if (prev != cur) {
+			prev = cur;
+			j++;
+		}
+	}
+	if (j < 6)
+		printk(KERN_WARNING "s6000-i2s: timeout waiting for WCLK\n");
+
+	s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_ENABLE_IF);
+}
+
+static inline void s6000_i2s_stop_channel(struct s6000_i2s_dev *dev,
+					  int channel)
+{
+	s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_DISABLE_IF);
+}
+
+static inline void s6000_i2s_start(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct s6000_i2s_dev *dev = rtd->dai->cpu_dai->private_data;
+	int channel;
+
+	channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+			dev->channel_out : dev->channel_in;
+
+	s6000_i2s_start_channel(dev, channel);
+}
+
+static inline void s6000_i2s_stop(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct s6000_i2s_dev *dev = rtd->dai->cpu_dai->private_data;
+	int channel;
+
+	channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
+			dev->channel_out : dev->channel_in;
+
+	s6000_i2s_stop_channel(dev, channel);
+}
+
+static inline unsigned int s6000_i2s_int_sources(struct s6000_i2s_dev *dev)
+{
+	unsigned int pending;
+	pending = s6_i2s_read_reg(dev, S6_I2S_INTERRUPT_RAW);
+	pending &= S6_I2S_INT_ALIGNMENT |
+		   S6_I2S_INT_UNDERRUN |
+		   S6_I2S_INT_OVERRUN;
+	s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR, pending);
+
+	return pending;
+}
+#endif
diff --git a/sound/soc/s6000/s6000-pcm.c b/sound/soc/s6000/s6000-pcm.c
new file mode 100644
index 0000000..90b546c
--- /dev/null
+++ b/sound/soc/s6000/s6000-pcm.c
@@ -0,0 +1,518 @@
+/*
+ * ALSA PCM interface for the Stetch s6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.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/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/dma.h>
+#include <variant/dmac.h>
+
+#include "s6000-i2s.h"
+#include "s6000-pcm.h"
+
+#define S6000_PCM_DEBUG 0
+#if S6000_PCM_DEBUG
+#define DPRINTK(x...) printk(KERN_DEBUG x)
+#else
+#define DPRINTK(x...)
+#endif
+
+#define S6_PCM_PREALLOCATE_SIZE (96 * 1024)
+#define S6_PCM_PREALLOCATE_MAX  (2048 * 1024)
+
+static struct snd_pcm_hardware s6000_pcm_hardware = {
+	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
+		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_JOINT_DUPLEX),
+	.formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE),
+	.rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_KNOT |
+		  SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_192000),
+	.rate_min = 0,
+	.rate_max = 1562500,
+	.channels_min = 2,
+	.channels_max = 8,
+	.buffer_bytes_max = 0x7ffffff0,
+	.period_bytes_min = 16,
+	.period_bytes_max = 0xfffff0,
+	.periods_min = 2,
+	.periods_max = 1024, /* no limit */
+	.fifo_size = 0,
+};
+
+struct s6000_runtime_data {
+	spinlock_t lock;
+	int period;		/* current DMA period */
+};
+
+static void s6000_pcm_enqueue_dma(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct s6000_runtime_data *prtd = runtime->private_data;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	int channel;
+	unsigned int period_size;
+	unsigned int dma_offset;
+	dma_addr_t dma_pos;
+	dma_addr_t src, dst;
+
+	period_size = snd_pcm_lib_period_bytes(substream);
+	dma_offset = prtd->period * period_size;
+	dma_pos = runtime->dma_addr + dma_offset;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		src = dma_pos;
+		dst = par->sif_out;
+		channel = par->dma_out;
+	} else {
+		src = par->sif_in;
+		dst = dma_pos;
+		channel = par->dma_in;
+	}
+
+	if (!s6dmac_channel_enabled(DMA_MASK_DMAC(channel),
+				    DMA_INDEX_CHNL(channel)))
+		return;
+
+	if (s6dmac_fifo_full(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel))) {
+		printk(KERN_ERR "s6000-pcm: fifo full\n");
+		return;
+	}
+
+	BUG_ON(period_size & 15);
+	s6dmac_put_fifo(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel),
+			src, dst, period_size);
+
+	prtd->period++;
+	if (unlikely(prtd->period >= runtime->periods))
+		prtd->period = 0;
+}
+
+static irqreturn_t s6000_pcm_irq(int irq, void *data)
+{
+	struct snd_pcm *pcm = data;
+	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
+	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+	struct snd_pcm_substream *playback, *capture;
+	struct s6000_runtime_data *prtd;
+	unsigned int i2s_errors;
+	int i, ret = IRQ_NONE;
+	u32 channel[2] = {
+		[SNDRV_PCM_STREAM_PLAYBACK] = params->dma_out,
+		[SNDRV_PCM_STREAM_CAPTURE] = params->dma_in
+	};
+
+	i2s_errors = s6000_i2s_int_sources(runtime->dai->cpu_dai->private_data);
+	playback = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+	capture = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
+
+	if (unlikely(i2s_errors & S6_I2S_INT_ALIGNMENT)) {
+		printk(KERN_ERR "s6000-i2s: Alignment Error\n");
+		ret = IRQ_HANDLED;
+	}
+
+	if (unlikely(i2s_errors & S6_I2S_INT_UNDERRUN) &&
+	    playback->runtime &&
+	    snd_pcm_running(playback)) {
+		printk(KERN_WARNING "s6000-i2s: Tx Underrun\n");
+		s6000_i2s_start(playback);
+
+		prtd = playback->runtime->private_data;
+		spin_lock(&prtd->lock);
+		s6000_pcm_enqueue_dma(playback);
+		/* a second descriptor will be queued below */
+		spin_unlock(&prtd->lock);
+
+		ret = IRQ_HANDLED;
+	}
+
+	for (i = 0; i < 2; ++i) {
+		struct snd_pcm_substream *substream = pcm->streams[i].substream;
+		unsigned int pending;
+
+		if (!channel[i])
+			continue;
+
+		pending = s6dmac_int_sources(DMA_MASK_DMAC(channel[i]),
+					     DMA_INDEX_CHNL(channel[i]));
+
+		if (pending & 1) {
+			ret = IRQ_HANDLED;
+			if (likely(substream->runtime &&
+				   snd_pcm_running(substream))) {
+				snd_pcm_period_elapsed(substream);
+				DPRINTK("period elapsed %x %x\n",
+				       s6dmac_cur_src(DMA_MASK_DMAC(channel[i]),
+						   DMA_INDEX_CHNL(channel[i])),
+				       s6dmac_cur_dst(DMA_MASK_DMAC(channel[i]),
+						   DMA_INDEX_CHNL(channel[i])));
+				prtd = substream->runtime->private_data;
+				spin_lock(&prtd->lock);
+				s6000_pcm_enqueue_dma(substream);
+				spin_unlock(&prtd->lock);
+			}
+		}
+
+		if (unlikely(pending & ~7)) {
+			if (pending & (1 << 3))
+				printk(KERN_WARNING
+				       "s6000-pcm: DMA %x Underflow\n",
+				       channel[i]);
+			if (pending & (1 << 4))
+				printk(KERN_WARNING
+				       "s6000-pcm: DMA %x Overflow\n",
+				       channel[i]);
+			if (pending & 0x1e0)
+				printk(KERN_WARNING
+				       "s6000-pcm: DMA %x Master Error "
+				       "(mask %x)\n",
+				       channel[i], pending >> 5);
+
+		}
+	}
+
+	if (unlikely(i2s_errors & S6_I2S_INT_OVERRUN) &&
+	    capture->runtime &&
+	    snd_pcm_running(capture)) {
+		printk(KERN_WARNING "s6000-i2s: Rx Overrun\n");
+
+		prtd = capture->runtime->private_data;
+		spin_lock(&prtd->lock);
+		s6000_pcm_enqueue_dma(capture);
+		spin_unlock(&prtd->lock);
+
+		s6000_i2s_start(capture);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+int s6000_pcm_start(struct snd_pcm_substream *substream)
+{
+	struct s6000_runtime_data *prtd = substream->runtime->private_data;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&prtd->lock, flags);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		s6dmac_enable_chan(DMA_MASK_DMAC(par->dma_out),
+				   DMA_INDEX_CHNL(par->dma_out),
+				   1, 0, 1, 0, 0, 0, 0, 4, -1, 0, 0, 1);
+	else
+		s6dmac_enable_chan(DMA_MASK_DMAC(par->dma_in),
+				   DMA_INDEX_CHNL(par->dma_in),
+				   1, 0, 0, 1, 0, 0, 0, 4, -1, 0, 0, 1);
+
+	s6000_pcm_enqueue_dma(substream);
+	s6000_pcm_enqueue_dma(substream);
+
+	spin_unlock_irqrestore(&prtd->lock, flags);
+
+	return 0;
+}
+
+int s6000_pcm_stop(struct snd_pcm_substream *substream)
+{
+	struct s6000_runtime_data *prtd = substream->runtime->private_data;
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	unsigned long flags;
+	u32 channel;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		channel = par->dma_out;
+	else
+		channel = par->dma_in;
+
+	s6dmac_set_terminal_count(DMA_MASK_DMAC(channel),
+				  DMA_INDEX_CHNL(channel), 0);
+
+	spin_lock_irqsave(&prtd->lock, flags);
+
+	s6dmac_disable_chan(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel));
+
+	spin_unlock_irqrestore(&prtd->lock, flags);
+
+	return 0;
+}
+
+static int s6000_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	int ret = 0;
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			s6000_i2s_start(substream);
+			ret = s6000_pcm_start(substream);
+		} else {
+			ret = s6000_pcm_start(substream);
+			s6000_i2s_start(substream);
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		s6000_i2s_stop(substream);
+		ret = s6000_pcm_stop(substream);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int s6000_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct s6000_runtime_data *prtd = substream->runtime->private_data;
+
+	prtd->period = 0;
+
+	return 0;
+}
+
+static snd_pcm_uframes_t s6000_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct s6000_runtime_data *prtd = runtime->private_data;
+	unsigned long flags;
+	unsigned int offset;
+	dma_addr_t count;
+
+	spin_lock_irqsave(&prtd->lock, flags);
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+		count = s6dmac_cur_src(DMA_MASK_DMAC(par->dma_out),
+				       DMA_INDEX_CHNL(par->dma_out));
+	else
+		count = s6dmac_cur_dst(DMA_MASK_DMAC(par->dma_in),
+				       DMA_INDEX_CHNL(par->dma_in));
+
+	count -= runtime->dma_addr;
+
+	spin_unlock_irqrestore(&prtd->lock, flags);
+
+	offset = bytes_to_frames(runtime, count);
+	if (unlikely(offset >= runtime->buffer_size))
+		offset = 0;
+
+	return offset;
+}
+
+static int s6000_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct s6000_runtime_data *prtd;
+	int ret;
+
+	snd_soc_set_runtime_hwparams(substream, &s6000_pcm_hardware);
+
+	ret = snd_pcm_hw_constraint_step(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 16);
+	if (ret < 0)
+		return ret;
+	ret = snd_pcm_hw_constraint_step(runtime, 0,
+					 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
+	if (ret < 0)
+		return ret;
+	ret = snd_pcm_hw_constraint_integer(runtime,
+					    SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0)
+		return ret;
+
+	if (par->same_rate) {
+		int rate;
+		spin_lock(&par->lock); /* needed? */
+		rate = par->rate;
+		spin_unlock(&par->lock);
+		if (rate != -1) {
+			ret = snd_pcm_hw_constraint_minmax(runtime,
+							SNDRV_PCM_HW_PARAM_RATE,
+							rate, rate);
+			if (ret < 0)
+				return ret;
+		}
+	}
+
+	prtd = kzalloc(sizeof(struct s6000_runtime_data), GFP_KERNEL);
+	if (prtd == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&prtd->lock);
+
+	runtime->private_data = prtd;
+
+	return 0;
+}
+
+static int s6000_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct s6000_runtime_data *prtd = runtime->private_data;
+
+	kfree(prtd);
+
+	return 0;
+}
+
+static int s6000_pcm_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+	int ret;
+	ret = snd_pcm_lib_malloc_pages(substream,
+				       params_buffer_bytes(hw_params));
+	if (ret < 0) {
+		printk(KERN_WARNING "s6000-pcm: allocation of memory failed\n");
+		return ret;
+	}
+
+	if (par->same_rate) {
+		spin_lock(&par->lock);
+		if (par->rate == -1 ||
+		    !(par->in_use & ~(1 << substream->stream))) {
+			par->rate = params_rate(hw_params);
+			par->in_use |= 1 << substream->stream;
+		} else if (params_rate(hw_params) != par->rate) {
+			snd_pcm_lib_free_pages(substream);
+			par->in_use &= ~(1 << substream->stream);
+			ret = -EBUSY;
+		}
+		spin_unlock(&par->lock);
+	}
+	return ret;
+}
+
+static int s6000_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+	struct s6000_pcm_dma_params *par = soc_runtime->dai->cpu_dai->dma_data;
+
+	spin_lock(&par->lock);
+	par->in_use &= ~(1 << substream->stream);
+	if (!par->in_use)
+		par->rate = -1;
+	spin_unlock(&par->lock);
+
+	return snd_pcm_lib_free_pages(substream);
+}
+
+struct snd_pcm_ops s6000_pcm_ops = {
+	.open = 	s6000_pcm_open,
+	.close = 	s6000_pcm_close,
+	.ioctl = 	snd_pcm_lib_ioctl,
+	.hw_params = 	s6000_pcm_hw_params,
+	.hw_free = 	s6000_pcm_hw_free,
+	.trigger =	s6000_pcm_trigger,
+	.prepare = 	s6000_pcm_prepare,
+	.pointer = 	s6000_pcm_pointer,
+};
+
+static void s6000_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
+	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+
+	free_irq(params->irq, pcm);
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+static u64 s6000_pcm_dmamask = DMA_32BIT_MASK;
+
+static int s6000_pcm_new(struct snd_card *card,
+			 struct snd_soc_dai *dai, struct snd_pcm *pcm)
+{
+	struct snd_soc_pcm_runtime *runtime = pcm->private_data;
+	struct s6000_pcm_dma_params *params = runtime->dai->cpu_dai->dma_data;
+	int res;
+
+	if (!card->dev->dma_mask)
+		card->dev->dma_mask = &s6000_pcm_dmamask;
+	if (!card->dev->coherent_dma_mask)
+		card->dev->coherent_dma_mask = DMA_32BIT_MASK;
+
+	if (params->dma_in) {
+		s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_in),
+				    DMA_INDEX_CHNL(params->dma_in));
+		s6dmac_int_sources(DMA_MASK_DMAC(params->dma_in),
+				   DMA_INDEX_CHNL(params->dma_in));
+	}
+
+	if (params->dma_out) {
+		s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_out),
+				    DMA_INDEX_CHNL(params->dma_out));
+		s6dmac_int_sources(DMA_MASK_DMAC(params->dma_out),
+				   DMA_INDEX_CHNL(params->dma_out));
+	}
+
+	res = request_irq(params->irq, s6000_pcm_irq, IRQF_SHARED,
+			  s6000_soc_platform.name, pcm);
+	if (res) {
+		printk(KERN_ERR "s6000-pcm couldn't get IRQ\n");
+		return res;
+	}
+
+	res = snd_pcm_lib_preallocate_pages_for_all(pcm,
+						    SNDRV_DMA_TYPE_DEV,
+						    card->dev,
+						    S6_PCM_PREALLOCATE_SIZE,
+						    S6_PCM_PREALLOCATE_MAX);
+	if (res)
+		printk(KERN_WARNING "s6000-pcm: preallocation failed\n");
+
+	spin_lock_init(&params->lock);
+	params->in_use = 0;
+	params->rate = -1;
+	return 0;
+}
+
+struct snd_soc_platform s6000_soc_platform = {
+	.name = 	"s6000-audio",
+	.pcm_ops = 	&s6000_pcm_ops,
+	.pcm_new = 	s6000_pcm_new,
+	.pcm_free = 	s6000_pcm_free,
+};
+EXPORT_SYMBOL_GPL(s6000_soc_platform);
+
+static int __init s6000_pcm_init(void)
+{
+	return snd_soc_register_platform(&s6000_soc_platform);
+}
+module_init(s6000_pcm_init);
+
+static void __exit s6000_pcm_exit(void)
+{
+	snd_soc_unregister_platform(&s6000_soc_platform);
+}
+module_exit(s6000_pcm_exit);
+
+MODULE_AUTHOR("Daniel Gloeckner");
+MODULE_DESCRIPTION("Stretch s6000 family PCM DMA module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/s6000/s6000-pcm.h b/sound/soc/s6000/s6000-pcm.h
new file mode 100644
index 0000000..8d7305f
--- /dev/null
+++ b/sound/soc/s6000/s6000-pcm.h
@@ -0,0 +1,41 @@
+/*
+ * ALSA PCM interface for the Stretch s6000 family
+ *
+ * Author:      Daniel Gloeckner, <dg@emlix.com>
+ * Copyright:   (C) 2009 emlix GmbH <info@emlix.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 _S6000_PCM_H
+#define _S6000_PCM_H
+
+struct s6000_pcm_dma_params {
+	dma_addr_t sif_in;
+	dma_addr_t sif_out;
+	u32 dma_in;
+	u32 dma_out;
+	int irq;
+	int same_rate;
+
+	spinlock_t lock;
+	int in_use;
+	int rate;
+};
+
+struct s6000_snd_platform_data {
+	int lines_in;
+	int lines_out;
+	int channel_in;
+	int channel_out;
+	int wide;
+	int same_rate;
+};
+
+int s6000_pcm_start(struct snd_pcm_substream *substream);
+int s6000_pcm_stop(struct snd_pcm_substream *substream);
+extern struct snd_soc_platform s6000_soc_platform;
+
+#endif
-- 
1.6.2.107.ge47ee

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