merge: http://linuxtv.org/hg/~jfrancois/gspca/

From: Mauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

9 files changed, 1316 insertions, 58 deletions

diff --git a/linux/drivers/media/video/Kconfig b/linux/drivers/media/video/Kconfig
index 45c90b8bc..c62127c2f 100644
--- a/linux/drivers/media/video/Kconfig
+++ b/linux/drivers/media/video/Kconfig
@@ -24,6 +24,11 @@ config VIDEOBUF_VMALLOC
 	select VIDEOBUF_GEN
 	tristate
 
+config VIDEOBUF_DMA_CONTIG
+	depends on HAS_DMA
+	select VIDEOBUF_GEN
+	tristate
+
 config VIDEOBUF_DVB
 	tristate
 	select VIDEOBUF_GEN
@@ -915,7 +920,7 @@ endif # V4L_USB_DRIVERS
 config SOC_CAMERA
 	tristate "SoC camera support"
 	depends on VIDEO_V4L2 && HAS_DMA
-	select VIDEOBUF_DMA_SG
+	select VIDEOBUF_GEN
 	help
 	  SoC Camera is a common API to several cameras, not connecting
 	  over a bus like PCI or USB. For example some i2c camera connected
@@ -950,11 +955,26 @@ config MT9V022_PCA9536_SWITCH
 	  Select this if your MT9V022 camera uses a PCA9536 I2C GPIO
 	  extender to switch between 8 and 10 bit datawidth modes
 
+config SOC_CAMERA_PLATFORM
+	tristate "platform camera support"
+	depends on SOC_CAMERA
+	help
+	  This is a generic SoC camera platform driver, useful for testing
+
 config VIDEO_PXA27x
 	tristate "PXA27x Quick Capture Interface driver"
 	depends on VIDEO_DEV && PXA27x
 	select SOC_CAMERA
+	select VIDEOBUF_DMA_SG
 	---help---
 	  This is a v4l2 driver for the PXA27x Quick Capture Interface
 
+config VIDEO_SH_MOBILE_CEU
+	tristate "SuperH Mobile CEU Interface driver"
+	depends on VIDEO_DEV
+	select SOC_CAMERA
+	select VIDEOBUF_DMA_CONTIG
+	---help---
+	  This is a v4l2 driver for the SuperH Mobile CEU Interface
+
 endif # VIDEO_CAPTURE_DRIVERS
diff --git a/linux/drivers/media/video/Makefile b/linux/drivers/media/video/Makefile
index 0a1837c99..00e2df8a4 100644
--- a/linux/drivers/media/video/Makefile
+++ b/linux/drivers/media/video/Makefile
@@ -89,6 +89,7 @@ obj-$(CONFIG_VIDEO_TUNER) += tuner.o
 
 obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o
 obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o
+obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o
 obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o
 obj-$(CONFIG_VIDEOBUF_DVB) += videobuf-dvb.o
 obj-$(CONFIG_VIDEO_BTCX)  += btcx-risc.o
@@ -133,9 +134,11 @@ obj-$(CONFIG_VIDEO_VIVI) += vivi.o
 obj-$(CONFIG_VIDEO_CX23885) += cx23885/
 
 obj-$(CONFIG_VIDEO_PXA27x)	+= pxa_camera.o
+obj-$(CONFIG_VIDEO_SH_MOBILE_CEU)	+= sh_mobile_ceu_camera.o
 obj-$(CONFIG_SOC_CAMERA)	+= soc_camera.o
 obj-$(CONFIG_SOC_CAMERA_MT9M001)	+= mt9m001.o
 obj-$(CONFIG_SOC_CAMERA_MT9V022)	+= mt9v022.o
+obj-$(CONFIG_SOC_CAMERA_PLATFORM)	+= soc_camera_platform.o
 
 obj-$(CONFIG_VIDEO_AU0828) += au0828/
 
diff --git a/linux/drivers/media/video/pxa_camera.c b/linux/drivers/media/video/pxa_camera.c
index 5ec5bb9a9..b15f82c49 100644
--- a/linux/drivers/media/video/pxa_camera.c
+++ b/linux/drivers/media/video/pxa_camera.c
@@ -30,6 +30,7 @@
 
 #include <media/v4l2-common.h>
 #include <media/v4l2-dev.h>
+#include <media/videobuf-dma-sg.h>
 #include <media/soc_camera.h>
 
 #include <linux/videodev2.h>
@@ -582,6 +583,19 @@ static struct videobuf_queue_ops pxa_videobuf_ops = {
 	.buf_release    = pxa_videobuf_release,
 };
 
+static void pxa_camera_init_videobuf(struct videobuf_queue *q,
+			      struct soc_camera_device *icd)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct pxa_camera_dev *pcdev = ici->priv;
+
+	/* We must pass NULL as dev pointer, then all pci_* dma operations
+	 * transform to normal dma_* ones. */
+	videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock,
+				V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
+				sizeof(struct pxa_buffer), icd);
+}
+
 static int mclk_get_divisor(struct pxa_camera_dev *pcdev)
 {
 	unsigned int mclk_10khz = pcdev->platform_mclk_10khz;
@@ -983,34 +997,23 @@ static int pxa_camera_querycap(struct soc_camera_host *ici,
 	return 0;
 }
 
-static spinlock_t *pxa_camera_spinlock_alloc(struct soc_camera_file *icf)
-{
-	struct soc_camera_host *ici =
-		to_soc_camera_host(icf->icd->dev.parent);
-	struct pxa_camera_dev *pcdev = ici->priv;
-
-	return &pcdev->lock;
-}
-
 static struct soc_camera_host_ops pxa_soc_camera_host_ops = {
 	.owner		= THIS_MODULE,
 	.add		= pxa_camera_add_device,
 	.remove		= pxa_camera_remove_device,
 	.set_fmt_cap	= pxa_camera_set_fmt_cap,
 	.try_fmt_cap	= pxa_camera_try_fmt_cap,
+	.init_videobuf	= pxa_camera_init_videobuf,
 	.reqbufs	= pxa_camera_reqbufs,
 	.poll		= pxa_camera_poll,
 	.querycap	= pxa_camera_querycap,
 	.try_bus_param	= pxa_camera_try_bus_param,
 	.set_bus_param	= pxa_camera_set_bus_param,
-	.spinlock_alloc	= pxa_camera_spinlock_alloc,
 };
 
 /* Should be allocated dynamically too, but we have only one. */
 static struct soc_camera_host pxa_soc_camera_host = {
 	.drv_name		= PXA_CAM_DRV_NAME,
-	.vbq_ops		= &pxa_videobuf_ops,
-	.msize			= sizeof(struct pxa_buffer),
 	.ops			= &pxa_soc_camera_host_ops,
 };
 
diff --git a/linux/drivers/media/video/sh_mobile_ceu_camera.c b/linux/drivers/media/video/sh_mobile_ceu_camera.c
new file mode 100644
index 000000000..6560ff496
--- /dev/null
+++ b/linux/drivers/media/video/sh_mobile_ceu_camera.c
@@ -0,0 +1,657 @@
+/*
+ * V4L2 Driver for SuperH Mobile CEU interface
+ *
+ * Copyright (C) 2008 Magnus Damm
+ *
+ * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
+ *
+ * Copyright (C) 2006, Sascha Hauer, Pengutronix
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/time.h>
+#include <linux/version.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/videodev2.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/soc_camera.h>
+#include <media/sh_mobile_ceu.h>
+#include <media/videobuf-dma-contig.h>
+
+/* register offsets for sh7722 / sh7723 */
+
+#define CAPSR  0x00
+#define CAPCR  0x04
+#define CAMCR  0x08
+#define CMCYR  0x0c
+#define CAMOR  0x10
+#define CAPWR  0x14
+#define CAIFR  0x18
+#define CSTCR  0x20 /* not on sh7723 */
+#define CSECR  0x24 /* not on sh7723 */
+#define CRCNTR 0x28
+#define CRCMPR 0x2c
+#define CFLCR  0x30
+#define CFSZR  0x34
+#define CDWDR  0x38
+#define CDAYR  0x3c
+#define CDACR  0x40
+#define CDBYR  0x44
+#define CDBCR  0x48
+#define CBDSR  0x4c
+#define CFWCR  0x5c
+#define CLFCR  0x60
+#define CDOCR  0x64
+#define CDDCR  0x68
+#define CDDAR  0x6c
+#define CEIER  0x70
+#define CETCR  0x74
+#define CSTSR  0x7c
+#define CSRTR  0x80
+#define CDSSR  0x84
+#define CDAYR2 0x90
+#define CDACR2 0x94
+#define CDBYR2 0x98
+#define CDBCR2 0x9c
+
+static DEFINE_MUTEX(camera_lock);
+
+/* per video frame buffer */
+struct sh_mobile_ceu_buffer {
+	struct videobuf_buffer vb; /* v4l buffer must be first */
+	const struct soc_camera_data_format *fmt;
+};
+
+struct sh_mobile_ceu_dev {
+	struct device *dev;
+	struct soc_camera_host ici;
+	struct soc_camera_device *icd;
+
+	unsigned int irq;
+	void __iomem *base;
+	unsigned long video_limit;
+
+	spinlock_t lock;
+	struct list_head capture;
+	struct videobuf_buffer *active;
+
+	struct sh_mobile_ceu_info *pdata;
+};
+
+static void ceu_write(struct sh_mobile_ceu_dev *priv,
+		      unsigned long reg_offs, unsigned long data)
+{
+	iowrite32(data, priv->base + reg_offs);
+}
+
+static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
+			      unsigned long reg_offs)
+{
+	return ioread32(priv->base + reg_offs);
+}
+
+/*
+ *  Videobuf operations
+ */
+static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
+					unsigned int *count,
+					unsigned int *size)
+{
+	struct soc_camera_device *icd = vq->priv_data;
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
+
+	*size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
+
+	if (0 == *count)
+		*count = 2;
+
+	if (pcdev->video_limit) {
+		while (*size * *count > pcdev->video_limit)
+			(*count)--;
+	}
+
+	dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
+
+	return 0;
+}
+
+static void free_buffer(struct videobuf_queue *vq,
+			struct sh_mobile_ceu_buffer *buf)
+{
+	struct soc_camera_device *icd = vq->priv_data;
+
+	dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+		&buf->vb, buf->vb.baddr, buf->vb.bsize);
+
+	if (in_interrupt())
+		BUG();
+
+	videobuf_dma_contig_free(vq, &buf->vb);
+	dev_dbg(&icd->dev, "%s freed\n", __func__);
+	buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
+{
+	ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
+	ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
+	ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
+
+	ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
+
+	ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
+
+	if (pcdev->active) {
+		ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
+		ceu_write(pcdev, CAPSR, 0x1); /* start capture */
+	}
+}
+
+static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
+					  struct videobuf_buffer *vb,
+					  enum v4l2_field field)
+{
+	struct soc_camera_device *icd = vq->priv_data;
+	struct sh_mobile_ceu_buffer *buf;
+	int ret;
+
+	buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
+
+	dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+		vb, vb->baddr, vb->bsize);
+
+	/* Added list head initialization on alloc */
+	WARN_ON(!list_empty(&vb->queue));
+
+#ifdef DEBUG
+	/* This can be useful if you want to see if we actually fill
+	 * the buffer with something */
+	memset((void *)vb->baddr, 0xaa, vb->bsize);
+#endif
+
+	BUG_ON(NULL == icd->current_fmt);
+
+	if (buf->fmt	!= icd->current_fmt ||
+	    vb->width	!= icd->width ||
+	    vb->height	!= icd->height ||
+	    vb->field	!= field) {
+		buf->fmt	= icd->current_fmt;
+		vb->width	= icd->width;
+		vb->height	= icd->height;
+		vb->field	= field;
+		vb->state	= VIDEOBUF_NEEDS_INIT;
+	}
+
+	vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
+	if (0 != vb->baddr && vb->bsize < vb->size) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (vb->state == VIDEOBUF_NEEDS_INIT) {
+		ret = videobuf_iolock(vq, vb, NULL);
+		if (ret)
+			goto fail;
+		vb->state = VIDEOBUF_PREPARED;
+	}
+
+	return 0;
+fail:
+	free_buffer(vq, buf);
+out:
+	return ret;
+}
+
+static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
+					 struct videobuf_buffer *vb)
+{
+	struct soc_camera_device *icd = vq->priv_data;
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	unsigned long flags;
+
+	dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+		vb, vb->baddr, vb->bsize);
+
+	vb->state = VIDEOBUF_ACTIVE;
+	spin_lock_irqsave(&pcdev->lock, flags);
+	list_add_tail(&vb->queue, &pcdev->capture);
+
+	if (!pcdev->active) {
+		pcdev->active = vb;
+		sh_mobile_ceu_capture(pcdev);
+	}
+
+	spin_unlock_irqrestore(&pcdev->lock, flags);
+}
+
+static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
+					   struct videobuf_buffer *vb)
+{
+	free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
+}
+
+static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
+	.buf_setup      = sh_mobile_ceu_videobuf_setup,
+	.buf_prepare    = sh_mobile_ceu_videobuf_prepare,
+	.buf_queue      = sh_mobile_ceu_videobuf_queue,
+	.buf_release    = sh_mobile_ceu_videobuf_release,
+};
+
+static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
+{
+	struct sh_mobile_ceu_dev *pcdev = data;
+	struct videobuf_buffer *vb;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pcdev->lock, flags);
+
+	vb = pcdev->active;
+	list_del_init(&vb->queue);
+
+	if (!list_empty(&pcdev->capture))
+		pcdev->active = list_entry(pcdev->capture.next,
+					   struct videobuf_buffer, queue);
+	else
+		pcdev->active = NULL;
+
+	sh_mobile_ceu_capture(pcdev);
+
+	vb->state = VIDEOBUF_DONE;
+	do_gettimeofday(&vb->ts);
+	vb->field_count++;
+	wake_up(&vb->done);
+	spin_unlock_irqrestore(&pcdev->lock, flags);
+
+	return IRQ_HANDLED;
+}
+
+static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	int ret = -EBUSY;
+
+	mutex_lock(&camera_lock);
+
+	if (pcdev->icd)
+		goto err;
+
+	dev_info(&icd->dev,
+		 "SuperH Mobile CEU driver attached to camera %d\n",
+		 icd->devnum);
+
+	if (pcdev->pdata->enable_camera)
+		pcdev->pdata->enable_camera();
+
+	ret = icd->ops->init(icd);
+	if (ret)
+		goto err;
+
+	ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
+	while (ceu_read(pcdev, CSTSR) & 1)
+		msleep(1);
+
+	pcdev->icd = icd;
+err:
+	mutex_unlock(&camera_lock);
+
+	return ret;
+}
+
+static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+
+	BUG_ON(icd != pcdev->icd);
+
+	/* disable capture, disable interrupts */
+	ceu_write(pcdev, CEIER, 0);
+	ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
+	icd->ops->release(icd);
+	if (pcdev->pdata->disable_camera)
+		pcdev->pdata->disable_camera();
+
+	dev_info(&icd->dev,
+		 "SuperH Mobile CEU driver detached from camera %d\n",
+		 icd->devnum);
+
+	pcdev->icd = NULL;
+}
+
+static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
+				       __u32 pixfmt)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	int ret, buswidth, width, cfszr_width, cdwdr_width;
+	unsigned long camera_flags, common_flags, value;
+
+	camera_flags = icd->ops->query_bus_param(icd);
+	common_flags = soc_camera_bus_param_compatible(camera_flags,
+						       pcdev->pdata->flags);
+	if (!common_flags)
+		return -EINVAL;
+
+	ret = icd->ops->set_bus_param(icd, common_flags);
+	if (ret < 0)
+		return ret;
+
+	switch (common_flags & SOCAM_DATAWIDTH_MASK) {
+	case SOCAM_DATAWIDTH_8:
+		buswidth = 8;
+		break;
+	case SOCAM_DATAWIDTH_16:
+		buswidth = 16;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ceu_write(pcdev, CRCNTR, 0);
+	ceu_write(pcdev, CRCMPR, 0);
+
+	value = 0x00000010;
+	value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
+	value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
+	value |= (buswidth == 16) ? (1 << 12) : 0;
+	ceu_write(pcdev, CAMCR, value);
+
+	ceu_write(pcdev, CAPCR, 0x00300000);
+	ceu_write(pcdev, CAIFR, 0);
+
+	mdelay(1);
+
+	width = icd->width * (icd->current_fmt->depth / 8);
+	width = (buswidth == 16) ? width / 2 : width;
+	cfszr_width = (buswidth == 8) ? width / 2 : width;
+	cdwdr_width = (buswidth == 16) ? width * 2 : width;
+
+	ceu_write(pcdev, CAMOR, 0);
+	ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
+	ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
+	ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
+	ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
+	ceu_write(pcdev, CDOCR, 0x00000016);
+
+	ceu_write(pcdev, CDWDR, cdwdr_width);
+	ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
+
+	/* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
+	/* in data fetch mode: no need for CDACR, CDBYR, CDBCR */
+
+	return 0;
+}
+
+static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
+				       __u32 pixfmt)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+	unsigned long camera_flags, common_flags;
+
+	camera_flags = icd->ops->query_bus_param(icd);
+	common_flags = soc_camera_bus_param_compatible(camera_flags,
+						       pcdev->pdata->flags);
+	if (!common_flags)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int sh_mobile_ceu_set_fmt_cap(struct soc_camera_device *icd,
+				     __u32 pixfmt, struct v4l2_rect *rect)
+{
+	return icd->ops->set_fmt_cap(icd, pixfmt, rect);
+}
+
+static int sh_mobile_ceu_try_fmt_cap(struct soc_camera_device *icd,
+				     struct v4l2_format *f)
+{
+	/* FIXME: calculate using depth and bus width */
+
+	if (f->fmt.pix.height < 4)
+		f->fmt.pix.height = 4;
+	if (f->fmt.pix.height > 1920)
+		f->fmt.pix.height = 1920;
+	if (f->fmt.pix.width < 2)
+		f->fmt.pix.width = 2;
+	if (f->fmt.pix.width > 2560)
+		f->fmt.pix.width = 2560;
+	f->fmt.pix.width &= ~0x01;
+	f->fmt.pix.height &= ~0x03;
+
+	/* limit to sensor capabilities */
+	return icd->ops->try_fmt_cap(icd, f);
+}
+
+static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
+				 struct v4l2_requestbuffers *p)
+{
+	int i;
+
+	/* This is for locking debugging only. I removed spinlocks and now I
+	 * check whether .prepare is ever called on a linked buffer, or whether
+	 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
+	 * it hadn't triggered */
+	for (i = 0; i < p->count; i++) {
+		struct sh_mobile_ceu_buffer *buf;
+
+		buf = container_of(icf->vb_vidq.bufs[i],
+				   struct sh_mobile_ceu_buffer, vb);
+		INIT_LIST_HEAD(&buf->vb.queue);
+	}
+
+	return 0;
+}
+
+static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
+{
+	struct soc_camera_file *icf = file->private_data;
+	struct sh_mobile_ceu_buffer *buf;
+
+	buf = list_entry(icf->vb_vidq.stream.next,
+			 struct sh_mobile_ceu_buffer, vb.stream);
+
+	poll_wait(file, &buf->vb.done, pt);
+
+	if (buf->vb.state == VIDEOBUF_DONE ||
+	    buf->vb.state == VIDEOBUF_ERROR)
+		return POLLIN|POLLRDNORM;
+
+	return 0;
+}
+
+static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
+				  struct v4l2_capability *cap)
+{
+	strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
+	cap->version = KERNEL_VERSION(0, 0, 5);
+	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+	return 0;
+}
+
+static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
+					struct soc_camera_device *icd)
+{
+	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+	struct sh_mobile_ceu_dev *pcdev = ici->priv;
+
+	videobuf_queue_dma_contig_init(q,
+				       &sh_mobile_ceu_videobuf_ops,
+				       &ici->dev, &pcdev->lock,
+				       V4L2_BUF_TYPE_VIDEO_CAPTURE,
+				       V4L2_FIELD_NONE,
+				       sizeof(struct sh_mobile_ceu_buffer),
+				       icd);
+}
+
+static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
+	.owner		= THIS_MODULE,
+	.add		= sh_mobile_ceu_add_device,
+	.remove		= sh_mobile_ceu_remove_device,
+	.set_fmt_cap	= sh_mobile_ceu_set_fmt_cap,
+	.try_fmt_cap	= sh_mobile_ceu_try_fmt_cap,
+	.reqbufs	= sh_mobile_ceu_reqbufs,
+	.poll		= sh_mobile_ceu_poll,
+	.querycap	= sh_mobile_ceu_querycap,
+	.try_bus_param	= sh_mobile_ceu_try_bus_param,
+	.set_bus_param	= sh_mobile_ceu_set_bus_param,
+	.init_videobuf	= sh_mobile_ceu_init_videobuf,
+};
+
+static int sh_mobile_ceu_probe(struct platform_device *pdev)
+{
+	struct sh_mobile_ceu_dev *pcdev;
+	struct resource *res;
+	void __iomem *base;
+	unsigned int irq;
+	int err = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!res || !irq) {
+		dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
+		err = -ENODEV;
+		goto exit;
+	}
+
+	pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
+	if (!pcdev) {
+		dev_err(&pdev->dev, "Could not allocate pcdev\n");
+		err = -ENOMEM;
+		goto exit;
+	}
+
+	platform_set_drvdata(pdev, pcdev);
+	INIT_LIST_HEAD(&pcdev->capture);
+	spin_lock_init(&pcdev->lock);
+
+	pcdev->pdata = pdev->dev.platform_data;
+	if (!pcdev->pdata) {
+		err = -EINVAL;
+		dev_err(&pdev->dev, "CEU platform data not set.\n");
+		goto exit_kfree;
+	}
+
+	base = ioremap_nocache(res->start, res->end - res->start + 1);
+	if (!base) {
+		err = -ENXIO;
+		dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
+		goto exit_kfree;
+	}
+
+	pcdev->irq = irq;
+	pcdev->base = base;
+	pcdev->video_limit = 0; /* only enabled if second resource exists */
+	pcdev->dev = &pdev->dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		err = dma_declare_coherent_memory(&pdev->dev, res->start,
+						  res->start,
+						  (res->end - res->start) + 1,
+						  DMA_MEMORY_MAP |
+						  DMA_MEMORY_EXCLUSIVE);
+		if (!err) {
+			dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
+			err = -ENXIO;
+			goto exit_iounmap;
+		}
+
+		pcdev->video_limit = (res->end - res->start) + 1;
+	}
+
+	/* request irq */
+	err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
+			  pdev->dev.bus_id, pcdev);
+	if (err) {
+		dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
+		goto exit_release_mem;
+	}
+
+	pcdev->ici.priv = pcdev;
+	pcdev->ici.dev.parent = &pdev->dev;
+	pcdev->ici.nr = pdev->id;
+	pcdev->ici.drv_name = pdev->dev.bus_id,
+	pcdev->ici.ops = &sh_mobile_ceu_host_ops,
+
+	err = soc_camera_host_register(&pcdev->ici);
+	if (err)
+		goto exit_free_irq;
+
+	return 0;
+
+exit_free_irq:
+	free_irq(pcdev->irq, pcdev);
+exit_release_mem:
+	if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
+		dma_release_declared_memory(&pdev->dev);
+exit_iounmap:
+	iounmap(base);
+exit_kfree:
+	kfree(pcdev);
+exit:
+	return err;
+}
+
+static int sh_mobile_ceu_remove(struct platform_device *pdev)
+{
+	struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
+
+	soc_camera_host_unregister(&pcdev->ici);
+	free_irq(pcdev->irq, pcdev);
+	if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
+		dma_release_declared_memory(&pdev->dev);
+	iounmap(pcdev->base);
+	kfree(pcdev);
+	return 0;
+}
+
+static struct platform_driver sh_mobile_ceu_driver = {
+	.driver 	= {
+		.name	= "sh_mobile_ceu",
+	},
+	.probe		= sh_mobile_ceu_probe,
+	.remove		= sh_mobile_ceu_remove,
+};
+
+static int __init sh_mobile_ceu_init(void)
+{
+	return platform_driver_register(&sh_mobile_ceu_driver);
+}
+
+static void __exit sh_mobile_ceu_exit(void)
+{
+	return platform_driver_unregister(&sh_mobile_ceu_driver);
+}
+
+module_init(sh_mobile_ceu_init);
+module_exit(sh_mobile_ceu_exit);
+
+MODULE_DESCRIPTION("SuperH Mobile CEU driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL");
diff --git a/linux/drivers/media/video/soc_camera.c b/linux/drivers/media/video/soc_camera.c
index 8ae2d9916..e39b98f1e 100644
--- a/linux/drivers/media/video/soc_camera.c
+++ b/linux/drivers/media/video/soc_camera.c
@@ -26,6 +26,7 @@
 
 #include <media/v4l2-common.h>
 #include <media/v4l2-dev.h>
+#include <media/videobuf-core.h>
 #include <media/soc_camera.h>
 
 static LIST_HEAD(hosts);
@@ -182,7 +183,6 @@ static int soc_camera_open(struct inode *inode, struct file *file)
 	struct soc_camera_device *icd;
 	struct soc_camera_host *ici;
 	struct soc_camera_file *icf;
-	spinlock_t *lock;
 	int ret;
 
 	icf = vmalloc(sizeof(*icf));
@@ -209,13 +209,6 @@ static int soc_camera_open(struct inode *inode, struct file *file)
 	}
 
 	icf->icd = icd;
-
-	icf->lock = ici->ops->spinlock_alloc(icf);
-	if (!icf->lock) {
-		ret = -ENOMEM;
-		goto esla;
-	}
-
 	icd->use_count++;
 
 	/* Now we really have to activate the camera */
@@ -233,21 +226,12 @@ static int soc_camera_open(struct inode *inode, struct file *file)
 	file->private_data = icf;
 	dev_dbg(&icd->dev, "camera device open\n");
 
-	/* We must pass NULL as dev pointer, then all pci_* dma operations
-	 * transform to normal dma_* ones. */
-	videobuf_queue_sg_init(&icf->vb_vidq, ici->vbq_ops, NULL, icf->lock,
-				V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
-				ici->msize, icd);
+	ici->ops->init_videobuf(&icf->vb_vidq, icd);
 
 	return 0;
 
 	/* All errors are entered with the video_lock held */
 eiciadd:
-	lock = icf->lock;
-	icf->lock = NULL;
-	if (ici->ops->spinlock_free)
-		ici->ops->spinlock_free(lock);
-esla:
 	module_put(ici->ops->owner);
 emgi:
 	module_put(icd->ops->owner);
@@ -263,15 +247,11 @@ static int soc_camera_close(struct inode *inode, struct file *file)
 	struct soc_camera_device *icd = icf->icd;
 	struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
 	struct video_device *vdev = icd->vdev;
-	spinlock_t *lock = icf->lock;
 
 	mutex_lock(&video_lock);
 	icd->use_count--;
 	if (!icd->use_count)
 		ici->ops->remove(icd);
-	icf->lock = NULL;
-	if (ici->ops->spinlock_free)
-		ici->ops->spinlock_free(lock);
 	module_put(icd->ops->owner);
 	module_put(ici->ops->owner);
 	mutex_unlock(&video_lock);
@@ -767,27 +747,12 @@ static void dummy_release(struct device *dev)
 {
 }
 
-static spinlock_t *spinlock_alloc(struct soc_camera_file *icf)
-{
-	spinlock_t *lock = kmalloc(sizeof(spinlock_t), GFP_KERNEL);
-
-	if (lock)
-		spin_lock_init(lock);
-
-	return lock;
-}
-
-static void spinlock_free(spinlock_t *lock)
-{
-	kfree(lock);
-}
-
 int soc_camera_host_register(struct soc_camera_host *ici)
 {
 	int ret;
 	struct soc_camera_host *ix;
 
-	if (!ici->vbq_ops || !ici->ops->add || !ici->ops->remove)
+	if (!ici->ops->init_videobuf || !ici->ops->add || !ici->ops->remove)
 		return -EINVAL;
 
 	/* Number might be equal to the platform device ID */
@@ -811,11 +776,6 @@ int soc_camera_host_register(struct soc_camera_host *ici)
 	if (ret)
 		goto edevr;
 
-	if (!ici->ops->spinlock_alloc) {
-		ici->ops->spinlock_alloc = spinlock_alloc;
-		ici->ops->spinlock_free = spinlock_free;
-	}
-
 	scan_add_host(ici);
 
 	return 0;
diff --git a/linux/drivers/media/video/soc_camera_platform.c b/linux/drivers/media/video/soc_camera_platform.c
new file mode 100644
index 000000000..eefb0327e
--- /dev/null
+++ b/linux/drivers/media/video/soc_camera_platform.c
@@ -0,0 +1,198 @@
+/*
+ * Generic Platform Camera Driver
+ *
+ * Copyright (C) 2008 Magnus Damm
+ * Based on mt9m001 driver,
+ * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
+ *
+ * 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/slab.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+#include <media/soc_camera.h>
+
+struct soc_camera_platform_info {
+	int iface;
+	char *format_name;
+	unsigned long format_depth;
+	struct v4l2_pix_format format;
+	unsigned long bus_param;
+	int (*set_capture)(struct soc_camera_platform_info *info, int enable);
+};
+
+struct soc_camera_platform_priv {
+	struct soc_camera_platform_info *info;
+	struct soc_camera_device icd;
+	struct soc_camera_data_format format;
+};
+
+static struct soc_camera_platform_info *
+soc_camera_platform_get_info(struct soc_camera_device *icd)
+{
+	struct soc_camera_platform_priv *priv;
+	priv = container_of(icd, struct soc_camera_platform_priv, icd);
+	return priv->info;
+}
+
+static int soc_camera_platform_init(struct soc_camera_device *icd)
+{
+	return 0;
+}
+
+static int soc_camera_platform_release(struct soc_camera_device *icd)
+{
+	return 0;
+}
+
+static int soc_camera_platform_start_capture(struct soc_camera_device *icd)
+{
+	struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
+	return p->set_capture(p, 1);
+}
+
+static int soc_camera_platform_stop_capture(struct soc_camera_device *icd)
+{
+	struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
+	return p->set_capture(p, 0);
+}
+
+static int soc_camera_platform_set_bus_param(struct soc_camera_device *icd,
+					     unsigned long flags)
+{
+	return 0;
+}
+
+static unsigned long
+soc_camera_platform_query_bus_param(struct soc_camera_device *icd)
+{
+	struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
+	return p->bus_param;
+}
+
+static int soc_camera_platform_set_fmt_cap(struct soc_camera_device *icd,
+					   __u32 pixfmt, struct v4l2_rect *rect)
+{
+	return 0;
+}
+
+static int soc_camera_platform_try_fmt_cap(struct soc_camera_device *icd,
+					   struct v4l2_format *f)
+{
+	struct soc_camera_platform_info *p = soc_camera_platform_get_info(icd);
+
+	f->fmt.pix.width = p->format.width;
+	f->fmt.pix.height = p->format.height;
+	return 0;
+}
+
+static int soc_camera_platform_video_probe(struct soc_camera_device *icd)
+{
+	struct soc_camera_platform_priv *priv;
+	priv = container_of(icd, struct soc_camera_platform_priv, icd);
+
+	priv->format.name = priv->info->format_name;
+	priv->format.depth = priv->info->format_depth;
+	priv->format.fourcc = priv->info->format.pixelformat;
+	priv->format.colorspace = priv->info->format.colorspace;
+
+	icd->formats = &priv->format;
+	icd->num_formats = 1;
+
+	return soc_camera_video_start(icd);
+}
+
+static void soc_camera_platform_video_remove(struct soc_camera_device *icd)
+{
+	soc_camera_video_stop(icd);
+}
+
+static struct soc_camera_ops soc_camera_platform_ops = {
+	.owner			= THIS_MODULE,
+	.probe			= soc_camera_platform_video_probe,
+	.remove			= soc_camera_platform_video_remove,
+	.init			= soc_camera_platform_init,
+	.release		= soc_camera_platform_release,
+	.start_capture		= soc_camera_platform_start_capture,
+	.stop_capture		= soc_camera_platform_stop_capture,
+	.set_fmt_cap		= soc_camera_platform_set_fmt_cap,
+	.try_fmt_cap		= soc_camera_platform_try_fmt_cap,
+	.set_bus_param		= soc_camera_platform_set_bus_param,
+	.query_bus_param	= soc_camera_platform_query_bus_param,
+};
+
+static int soc_camera_platform_probe(struct platform_device *pdev)
+{
+	struct soc_camera_platform_priv *priv;
+	struct soc_camera_platform_info *p;
+	struct soc_camera_device *icd;
+	int ret;
+
+	p = pdev->dev.platform_data;
+	if (!p)
+		return -EINVAL;
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->info = p;
+	platform_set_drvdata(pdev, priv);
+
+	icd = &priv->icd;
+	icd->ops	= &soc_camera_platform_ops;
+	icd->control	= &pdev->dev;
+	icd->width_min	= 0;
+	icd->width_max	= priv->info->format.width;
+	icd->height_min	= 0;
+	icd->height_max	= priv->info->format.height;
+	icd->y_skip_top	= 0;
+	icd->iface	= priv->info->iface;
+
+	ret = soc_camera_device_register(icd);
+	if (ret)
+		kfree(priv);
+
+	return ret;
+}
+
+static int soc_camera_platform_remove(struct platform_device *pdev)
+{
+	struct soc_camera_platform_priv *priv = platform_get_drvdata(pdev);
+
+	soc_camera_device_unregister(&priv->icd);
+	kfree(priv);
+	return 0;
+}
+
+static struct platform_driver soc_camera_platform_driver = {
+	.driver 	= {
+		.name	= "soc_camera_platform",
+	},
+	.probe		= soc_camera_platform_probe,
+	.remove		= soc_camera_platform_remove,
+};
+
+static int __init soc_camera_platform_module_init(void)
+{
+	return platform_driver_register(&soc_camera_platform_driver);
+}
+
+static void __exit soc_camera_platform_module_exit(void)
+{
+	return platform_driver_unregister(&soc_camera_platform_driver);
+}
+
+module_init(soc_camera_platform_module_init);
+module_exit(soc_camera_platform_module_exit);
+
+MODULE_DESCRIPTION("SoC Camera Platform driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
diff --git a/linux/drivers/media/video/videobuf-dma-contig.c b/linux/drivers/media/video/videobuf-dma-contig.c
new file mode 100644
index 000000000..2475535cb
--- /dev/null
+++ b/linux/drivers/media/video/videobuf-dma-contig.c
@@ -0,0 +1,417 @@
+/*
+ * helper functions for physically contiguous capture buffers
+ *
+ * The functions support hardware lacking scatter gather support
+ * (i.e. the buffers must be linear in physical memory)
+ *
+ * Copyright (c) 2008 Magnus Damm
+ *
+ * Based on videobuf-vmalloc.c,
+ * (c) 2007 Mauro Carvalho Chehab, <mchehab@infradead.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <media/videobuf-dma-contig.h>
+
+struct videobuf_dma_contig_memory {
+	u32 magic;
+	void *vaddr;
+	dma_addr_t dma_handle;
+	unsigned long size;
+};
+
+#define MAGIC_DC_MEM 0x0733ac61
+#define MAGIC_CHECK(is, should)						\
+	if (unlikely((is) != (should)))	{				\
+		pr_err("magic mismatch: %x expected %x\n", is, should); \
+		BUG();							\
+	}
+
+static void
+videobuf_vm_open(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+
+	dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n",
+		map, map->count, vma->vm_start, vma->vm_end);
+
+	map->count++;
+}
+
+static void videobuf_vm_close(struct vm_area_struct *vma)
+{
+	struct videobuf_mapping *map = vma->vm_private_data;
+	struct videobuf_queue *q = map->q;
+	int i;
+
+	dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
+		map, map->count, vma->vm_start, vma->vm_end);
+
+	map->count--;
+	if (0 == map->count) {
+		struct videobuf_dma_contig_memory *mem;
+
+		dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q);
+		mutex_lock(&q->vb_lock);
+
+		/* We need first to cancel streams, before unmapping */
+		if (q->streaming)
+			videobuf_queue_cancel(q);
+
+		for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+			if (NULL == q->bufs[i])
+				continue;
+
+			if (q->bufs[i]->map != map)
+				continue;
+
+			mem = q->bufs[i]->priv;
+			if (mem) {
+				/* This callback is called only if kernel has
+				   allocated memory and this memory is mmapped.
+				   In this case, memory should be freed,
+				   in order to do memory unmap.
+				 */
+
+				MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+				/* vfree is not atomic - can't be
+				   called with IRQ's disabled
+				 */
+				dev_dbg(map->q->dev, "buf[%d] freeing %p\n",
+					i, mem->vaddr);
+
+				dma_free_coherent(q->dev, mem->size,
+						  mem->vaddr, mem->dma_handle);
+				mem->vaddr = NULL;
+			}
+
+			q->bufs[i]->map   = NULL;
+			q->bufs[i]->baddr = 0;
+		}
+
+		kfree(map);
+
+		mutex_unlock(&q->vb_lock);
+	}
+}
+
+static struct vm_operations_struct videobuf_vm_ops = {
+	.open     = videobuf_vm_open,
+	.close    = videobuf_vm_close,
+};
+
+static void *__videobuf_alloc(size_t size)
+{
+	struct videobuf_dma_contig_memory *mem;
+	struct videobuf_buffer *vb;
+
+	vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
+	if (vb) {
+		mem = vb->priv = ((char *)vb) + size;
+		mem->magic = MAGIC_DC_MEM;
+	}
+
+	return vb;
+}
+
+static void *__videobuf_to_vmalloc(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	return mem->vaddr;
+}
+
+static int __videobuf_iolock(struct videobuf_queue *q,
+			     struct videobuf_buffer *vb,
+			     struct v4l2_framebuffer *fbuf)
+{
+	struct videobuf_dma_contig_memory *mem = vb->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	switch (vb->memory) {
+	case V4L2_MEMORY_MMAP:
+		dev_dbg(q->dev, "%s memory method MMAP\n", __func__);
+
+		/* All handling should be done by __videobuf_mmap_mapper() */
+		if (!mem->vaddr) {
+			dev_err(q->dev, "memory is not alloced/mmapped.\n");
+			return -EINVAL;
+		}
+		break;
+	case V4L2_MEMORY_USERPTR:
+		dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
+
+		/* The only USERPTR currently supported is the one needed for
+		   read() method.
+		 */
+		if (vb->baddr)
+			return -EINVAL;
+
+		mem->size = PAGE_ALIGN(vb->size);
+		mem->vaddr = dma_alloc_coherent(q->dev, mem->size,
+						&mem->dma_handle, GFP_KERNEL);
+		if (!mem->vaddr) {
+			dev_err(q->dev, "dma_alloc_coherent %ld failed\n",
+					 mem->size);
+			return -ENOMEM;
+		}
+
+		dev_dbg(q->dev, "dma_alloc_coherent data is at %p (%ld)\n",
+			mem->vaddr, mem->size);
+		break;
+	case V4L2_MEMORY_OVERLAY:
+	default:
+		dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int __videobuf_sync(struct videobuf_queue *q,
+			   struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	dma_sync_single_for_cpu(q->dev, mem->dma_handle, mem->size,
+				DMA_FROM_DEVICE);
+	return 0;
+}
+
+static int __videobuf_mmap_free(struct videobuf_queue *q)
+{
+	unsigned int i;
+
+	dev_dbg(q->dev, "%s\n", __func__);
+	for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+		if (q->bufs[i] && q->bufs[i]->map)
+			return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int __videobuf_mmap_mapper(struct videobuf_queue *q,
+				  struct vm_area_struct *vma)
+{
+	struct videobuf_dma_contig_memory *mem;
+	struct videobuf_mapping *map;
+	unsigned int first;
+	int retval;
+	unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT;
+
+	dev_dbg(q->dev, "%s\n", __func__);
+	if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
+		return -EINVAL;
+
+	/* look for first buffer to map */
+	for (first = 0; first < VIDEO_MAX_FRAME; first++) {
+		if (!q->bufs[first])
+			continue;
+
+		if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
+			continue;
+		if (q->bufs[first]->boff == offset)
+			break;
+	}
+	if (VIDEO_MAX_FRAME == first) {
+		dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n",
+			offset);
+		return -EINVAL;
+	}
+
+	/* create mapping + update buffer list */
+	map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
+	if (!map)
+		return -ENOMEM;
+
+	q->bufs[first]->map = map;
+	map->start = vma->vm_start;
+	map->end = vma->vm_end;
+	map->q = q;
+
+	q->bufs[first]->baddr = vma->vm_start;
+
+	mem = q->bufs[first]->priv;
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	mem->size = PAGE_ALIGN(q->bufs[first]->bsize);
+	mem->vaddr = dma_alloc_coherent(q->dev, mem->size,
+					&mem->dma_handle, GFP_KERNEL);
+	if (!mem->vaddr) {
+		dev_err(q->dev, "dma_alloc_coherent size %ld failed\n",
+			mem->size);
+		goto error;
+	}
+	dev_dbg(q->dev, "dma_alloc_coherent data is at addr %p (size %ld)\n",
+		mem->vaddr, mem->size);
+
+	/* Try to remap memory */
+
+	size = vma->vm_end - vma->vm_start;
+	size = (size < mem->size) ? size : mem->size;
+
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+	retval = remap_pfn_range(vma, vma->vm_start,
+				 mem->dma_handle >> PAGE_SHIFT,
+				 size, vma->vm_page_prot);
+	if (retval) {
+		dev_err(q->dev, "mmap: remap failed with error %d. ", retval);
+		dma_free_coherent(q->dev, mem->size,
+				  mem->vaddr, mem->dma_handle);
+		goto error;
+	}
+
+	vma->vm_ops          = &videobuf_vm_ops;
+	vma->vm_flags       |= VM_DONTEXPAND;
+	vma->vm_private_data = map;
+
+	dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+		map, q, vma->vm_start, vma->vm_end,
+		(long int) q->bufs[first]->bsize,
+		vma->vm_pgoff, first);
+
+	videobuf_vm_open(vma);
+
+	return 0;
+
+error:
+	kfree(map);
+	return -ENOMEM;
+}
+
+static int __videobuf_copy_to_user(struct videobuf_queue *q,
+				   char __user *data, size_t count,
+				   int nonblocking)
+{
+	struct videobuf_dma_contig_memory *mem = q->read_buf->priv;
+	void *vaddr;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+	BUG_ON(!mem->vaddr);
+
+	/* copy to userspace */
+	if (count > q->read_buf->size - q->read_off)
+		count = q->read_buf->size - q->read_off;
+
+	vaddr = mem->vaddr;
+
+	if (copy_to_user(data, vaddr + q->read_off, count))
+		return -EFAULT;
+
+	return count;
+}
+
+static int __videobuf_copy_stream(struct videobuf_queue *q,
+				  char __user *data, size_t count, size_t pos,
+				  int vbihack, int nonblocking)
+{
+	unsigned int  *fc;
+	struct videobuf_dma_contig_memory *mem = q->read_buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	if (vbihack) {
+		/* dirty, undocumented hack -- pass the frame counter
+			* within the last four bytes of each vbi data block.
+			* We need that one to maintain backward compatibility
+			* to all vbi decoding software out there ... */
+		fc = (unsigned int *)mem->vaddr;
+		fc += (q->read_buf->size >> 2) - 1;
+		*fc = q->read_buf->field_count >> 1;
+		dev_dbg(q->dev, "vbihack: %d\n", *fc);
+	}
+
+	/* copy stuff using the common method */
+	count = __videobuf_copy_to_user(q, data, count, nonblocking);
+
+	if ((count == -EFAULT) && (pos == 0))
+		return -EFAULT;
+
+	return count;
+}
+
+static struct videobuf_qtype_ops qops = {
+	.magic        = MAGIC_QTYPE_OPS,
+
+	.alloc        = __videobuf_alloc,
+	.iolock       = __videobuf_iolock,
+	.sync         = __videobuf_sync,
+	.mmap_free    = __videobuf_mmap_free,
+	.mmap_mapper  = __videobuf_mmap_mapper,
+	.video_copy_to_user = __videobuf_copy_to_user,
+	.copy_stream  = __videobuf_copy_stream,
+	.vmalloc      = __videobuf_to_vmalloc,
+};
+
+void videobuf_queue_dma_contig_init(struct videobuf_queue *q,
+				    struct videobuf_queue_ops *ops,
+				    struct device *dev,
+				    spinlock_t *irqlock,
+				    enum v4l2_buf_type type,
+				    enum v4l2_field field,
+				    unsigned int msize,
+				    void *priv)
+{
+	videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
+				 priv, &qops);
+}
+EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init);
+
+dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	BUG_ON(!mem);
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	return mem->dma_handle;
+}
+EXPORT_SYMBOL_GPL(videobuf_to_dma_contig);
+
+void videobuf_dma_contig_free(struct videobuf_queue *q,
+			      struct videobuf_buffer *buf)
+{
+	struct videobuf_dma_contig_memory *mem = buf->priv;
+
+	/* mmapped memory can't be freed here, otherwise mmapped region
+	   would be released, while still needed. In this case, the memory
+	   release should happen inside videobuf_vm_close().
+	   So, it should free memory only if the memory were allocated for
+	   read() operation.
+	 */
+	if ((buf->memory != V4L2_MEMORY_USERPTR) || !buf->baddr)
+		return;
+
+	if (!mem)
+		return;
+
+	MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+	dma_free_coherent(q->dev, mem->size, mem->vaddr, mem->dma_handle);
+	mem->vaddr = NULL;
+}
+EXPORT_SYMBOL_GPL(videobuf_dma_contig_free);
+
+MODULE_DESCRIPTION("helper module to manage video4linux dma contig buffers");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL");
diff --git a/linux/drivers/media/video/videobuf-dma-sg.c b/linux/drivers/media/video/videobuf-dma-sg.c
index 21194d6fe..e64350e1f 100644
--- a/linux/drivers/media/video/videobuf-dma-sg.c
+++ b/linux/drivers/media/video/videobuf-dma-sg.c
@@ -1,7 +1,7 @@
 /*
  * helper functions for SG DMA video4linux capture buffers
  *
- * The functions expect the hardware being able to scatter gatter
+ * The functions expect the hardware being able to scatter gather
  * (i.e. the buffers are not linear in physical memory, but fragmented
  * into PAGE_SIZE chunks).  They also assume the driver does not need
  * to touch the video data.
diff --git a/linux/drivers/media/video/videobuf-vmalloc.c b/linux/drivers/media/video/videobuf-vmalloc.c
index 6f487b348..eb25cc257 100644
--- a/linux/drivers/media/video/videobuf-vmalloc.c
+++ b/linux/drivers/media/video/videobuf-vmalloc.c
@@ -1,7 +1,7 @@
 /*
  * helper functions for vmalloc video4linux capture buffers
  *
- * The functions expect the hardware being able to scatter gatter
+ * The functions expect the hardware being able to scatter gather
  * (i.e. the buffers are not linear in physical memory, but fragmented
  * into PAGE_SIZE chunks).  They also assume the driver does not need
  * to touch the video data.