Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (255 commits)
  [media] radio-aimslab.c: Fix gcc 4.5+ bug
  [media] cx25821: Fix compilation breakage due to BKL dependency
  [media] v4l2-compat-ioctl32: fix compile warning
  [media] zoran: fix compiler warning
  [media] tda18218: fix compile warning
  [media] ngene: fix compile warning
  [media] DVB: IR support for TechnoTrend CT-3650
  [media] cx23885, cimax2.c: Fix case of two CAM insertion irq
  [media] ir-nec-decoder: fix repeat key issue
  [media] staging: se401 depends on USB
  [media] staging: usbvideo/vicam depends on USB
  [media] soc_camera: Add the ability to bind regulators to soc_camedra devices
  [media] V4L2: Add a v4l2-subdev (soc-camera) driver for OmniVision OV2640 sensor
  [media] v4l: soc-camera: switch to .unlocked_ioctl
  [media] v4l: ov772x: simplify pointer dereference
  [media] ov9640: fix OmniVision OV9640 sensor driver's priv data retrieving
  [media] ov9640: use macro to request OmniVision OV9640 sensor private data
  [media] ivtv-i2c: Fix two warnings
  [media] staging/lirc: Update lirc TODO files
  [media] cx88: Remove the obsolete i2c_adapter.id field
  ...

1 files changed, 893 insertions, 0 deletions

diff --git a/drivers/media/video/timblogiw.c b/drivers/media/video/timblogiw.c
new file mode 100644
index 00000000000..fc611ebeb82
--- /dev/null
+++ b/drivers/media/video/timblogiw.c
@@ -0,0 +1,893 @@
+/*
+ * timblogiw.c timberdale FPGA LogiWin Video In driver
+ * Copyright (c) 2009-2010 Intel Corporation
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Timberdale FPGA LogiWin Video In
+ */
+
+#include <linux/version.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+#include <linux/scatterlist.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/i2c.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-device.h>
+#include <media/videobuf-dma-contig.h>
+#include <media/timb_video.h>
+
+#define DRIVER_NAME			"timb-video"
+
+#define TIMBLOGIWIN_NAME		"Timberdale Video-In"
+#define TIMBLOGIW_VERSION_CODE		0x04
+
+#define TIMBLOGIW_LINES_PER_DESC	44
+#define TIMBLOGIW_MAX_VIDEO_MEM		16
+
+#define TIMBLOGIW_HAS_DECODER(lw)	(lw->pdata.encoder.module_name)
+
+
+struct timblogiw {
+	struct video_device		video_dev;
+	struct v4l2_device		v4l2_dev; /* mutual exclusion */
+	struct mutex			lock;
+	struct device			*dev;
+	struct timb_video_platform_data pdata;
+	struct v4l2_subdev		*sd_enc;	/* encoder */
+	bool				opened;
+};
+
+struct timblogiw_tvnorm {
+	v4l2_std_id std;
+	u16     width;
+	u16     height;
+	u8	fps;
+};
+
+struct timblogiw_fh {
+	struct videobuf_queue		vb_vidq;
+	struct timblogiw_tvnorm const	*cur_norm;
+	struct list_head		capture;
+	struct dma_chan			*chan;
+	spinlock_t			queue_lock; /* mutual exclusion */
+	unsigned int			frame_count;
+};
+
+struct timblogiw_buffer {
+	/* common v4l buffer stuff -- must be first */
+	struct videobuf_buffer	vb;
+	struct scatterlist	sg[16];
+	dma_cookie_t		cookie;
+	struct timblogiw_fh	*fh;
+};
+
+const struct timblogiw_tvnorm timblogiw_tvnorms[] = {
+	{
+		.std			= V4L2_STD_PAL,
+		.width			= 720,
+		.height			= 576,
+		.fps			= 25
+	},
+	{
+		.std			= V4L2_STD_NTSC,
+		.width			= 720,
+		.height			= 480,
+		.fps			= 30
+	}
+};
+
+static int timblogiw_bytes_per_line(const struct timblogiw_tvnorm *norm)
+{
+	return norm->width * 2;
+}
+
+
+static int timblogiw_frame_size(const struct timblogiw_tvnorm *norm)
+{
+	return norm->height * timblogiw_bytes_per_line(norm);
+}
+
+static const struct timblogiw_tvnorm *timblogiw_get_norm(const v4l2_std_id std)
+{
+	int i;
+	for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++)
+		if (timblogiw_tvnorms[i].std & std)
+			return timblogiw_tvnorms + i;
+
+	/* default to first element */
+	return timblogiw_tvnorms;
+}
+
+static void timblogiw_dma_cb(void *data)
+{
+	struct timblogiw_buffer *buf = data;
+	struct timblogiw_fh *fh = buf->fh;
+	struct videobuf_buffer *vb = &buf->vb;
+
+	spin_lock(&fh->queue_lock);
+
+	/* mark the transfer done */
+	buf->cookie = -1;
+
+	fh->frame_count++;
+
+	if (vb->state != VIDEOBUF_ERROR) {
+		list_del(&vb->queue);
+		do_gettimeofday(&vb->ts);
+		vb->field_count = fh->frame_count * 2;
+		vb->state = VIDEOBUF_DONE;
+
+		wake_up(&vb->done);
+	}
+
+	if (!list_empty(&fh->capture)) {
+		vb = list_entry(fh->capture.next, struct videobuf_buffer,
+			queue);
+		vb->state = VIDEOBUF_ACTIVE;
+	}
+
+	spin_unlock(&fh->queue_lock);
+}
+
+static bool timblogiw_dma_filter_fn(struct dma_chan *chan, void *filter_param)
+{
+	return chan->chan_id == (uintptr_t)filter_param;
+}
+
+/* IOCTL functions */
+
+static int timblogiw_g_fmt(struct file *file, void  *priv,
+	struct v4l2_format *format)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s entry\n", __func__);
+
+	if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	mutex_lock(&lw->lock);
+
+	format->fmt.pix.width = fh->cur_norm->width;
+	format->fmt.pix.height = fh->cur_norm->height;
+	format->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
+	format->fmt.pix.bytesperline = timblogiw_bytes_per_line(fh->cur_norm);
+	format->fmt.pix.sizeimage = timblogiw_frame_size(fh->cur_norm);
+	format->fmt.pix.field = V4L2_FIELD_NONE;
+
+	mutex_unlock(&lw->lock);
+
+	return 0;
+}
+
+static int timblogiw_try_fmt(struct file *file, void  *priv,
+	struct v4l2_format *format)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct v4l2_pix_format *pix = &format->fmt.pix;
+
+	dev_dbg(&vdev->dev,
+		"%s - width=%d, height=%d, pixelformat=%d, field=%d\n"
+		"bytes per line %d, size image: %d, colorspace: %d\n",
+		__func__,
+		pix->width, pix->height, pix->pixelformat, pix->field,
+		pix->bytesperline, pix->sizeimage, pix->colorspace);
+
+	if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	if (pix->field != V4L2_FIELD_NONE)
+		return -EINVAL;
+
+	if (pix->pixelformat != V4L2_PIX_FMT_UYVY)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int timblogiw_s_fmt(struct file *file, void  *priv,
+	struct v4l2_format *format)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh = priv;
+	struct v4l2_pix_format *pix = &format->fmt.pix;
+	int err;
+
+	mutex_lock(&lw->lock);
+
+	err = timblogiw_try_fmt(file, priv, format);
+	if (err)
+		goto out;
+
+	if (videobuf_queue_is_busy(&fh->vb_vidq)) {
+		dev_err(&vdev->dev, "%s queue busy\n", __func__);
+		err = -EBUSY;
+		goto out;
+	}
+
+	pix->width = fh->cur_norm->width;
+	pix->height = fh->cur_norm->height;
+
+out:
+	mutex_unlock(&lw->lock);
+	return err;
+}
+
+static int timblogiw_querycap(struct file *file, void  *priv,
+	struct v4l2_capability *cap)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	dev_dbg(&vdev->dev, "%s: Entry\n",  __func__);
+	memset(cap, 0, sizeof(*cap));
+	strncpy(cap->card, TIMBLOGIWIN_NAME, sizeof(cap->card)-1);
+	strncpy(cap->driver, DRIVER_NAME, sizeof(cap->driver) - 1);
+	strlcpy(cap->bus_info, vdev->name, sizeof(cap->bus_info));
+	cap->version = TIMBLOGIW_VERSION_CODE;
+	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+		V4L2_CAP_READWRITE;
+
+	return 0;
+}
+
+static int timblogiw_enum_fmt(struct file *file, void  *priv,
+	struct v4l2_fmtdesc *fmt)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	dev_dbg(&vdev->dev, "%s, index: %d\n",  __func__, fmt->index);
+
+	if (fmt->index != 0)
+		return -EINVAL;
+	memset(fmt, 0, sizeof(*fmt));
+	fmt->index = 0;
+	fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	strncpy(fmt->description, "4:2:2, packed, YUYV",
+		sizeof(fmt->description)-1);
+	fmt->pixelformat = V4L2_PIX_FMT_UYVY;
+
+	return 0;
+}
+
+static int timblogiw_g_parm(struct file *file, void *priv,
+	struct v4l2_streamparm *sp)
+{
+	struct timblogiw_fh *fh = priv;
+	struct v4l2_captureparm *cp = &sp->parm.capture;
+
+	cp->capability = V4L2_CAP_TIMEPERFRAME;
+	cp->timeperframe.numerator = 1;
+	cp->timeperframe.denominator = fh->cur_norm->fps;
+
+	return 0;
+}
+
+static int timblogiw_reqbufs(struct file *file, void  *priv,
+	struct v4l2_requestbuffers *rb)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_reqbufs(&fh->vb_vidq, rb);
+}
+
+static int timblogiw_querybuf(struct file *file, void  *priv,
+	struct v4l2_buffer *b)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_querybuf(&fh->vb_vidq, b);
+}
+
+static int timblogiw_qbuf(struct file *file, void  *priv, struct v4l2_buffer *b)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_qbuf(&fh->vb_vidq, b);
+}
+
+static int timblogiw_dqbuf(struct file *file, void  *priv,
+	struct v4l2_buffer *b)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
+}
+
+static int timblogiw_g_std(struct file *file, void  *priv, v4l2_std_id *std)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	*std = fh->cur_norm->std;
+	return 0;
+}
+
+static int timblogiw_s_std(struct file *file, void  *priv, v4l2_std_id *std)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh = priv;
+	int err = 0;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	mutex_lock(&lw->lock);
+
+	if (TIMBLOGIW_HAS_DECODER(lw))
+		err = v4l2_subdev_call(lw->sd_enc, core, s_std, *std);
+
+	if (!err)
+		fh->cur_norm = timblogiw_get_norm(*std);
+
+	mutex_unlock(&lw->lock);
+
+	return err;
+}
+
+static int timblogiw_enuminput(struct file *file, void  *priv,
+	struct v4l2_input *inp)
+{
+	struct video_device *vdev = video_devdata(file);
+	int i;
+
+	dev_dbg(&vdev->dev, "%s: Entry\n",  __func__);
+
+	if (inp->index != 0)
+		return -EINVAL;
+
+	inp->index = 0;
+
+	strncpy(inp->name, "Timb input 1", sizeof(inp->name) - 1);
+	inp->type = V4L2_INPUT_TYPE_CAMERA;
+
+	inp->std = 0;
+	for (i = 0; i < ARRAY_SIZE(timblogiw_tvnorms); i++)
+		inp->std |= timblogiw_tvnorms[i].std;
+
+	return 0;
+}
+
+static int timblogiw_g_input(struct file *file, void  *priv,
+	unsigned int *input)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	dev_dbg(&vdev->dev, "%s: Entry\n",  __func__);
+
+	*input = 0;
+
+	return 0;
+}
+
+static int timblogiw_s_input(struct file *file, void  *priv, unsigned int input)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	dev_dbg(&vdev->dev, "%s: Entry\n",  __func__);
+
+	if (input != 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int timblogiw_streamon(struct file *file, void  *priv, unsigned int type)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		dev_dbg(&vdev->dev, "%s - No capture device\n", __func__);
+		return -EINVAL;
+	}
+
+	fh->frame_count = 0;
+	return videobuf_streamon(&fh->vb_vidq);
+}
+
+static int timblogiw_streamoff(struct file *file, void  *priv,
+	unsigned int type)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s entry\n",  __func__);
+
+	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	return videobuf_streamoff(&fh->vb_vidq);
+}
+
+static int timblogiw_querystd(struct file *file, void  *priv, v4l2_std_id *std)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s entry\n",  __func__);
+
+	if (TIMBLOGIW_HAS_DECODER(lw))
+		return v4l2_subdev_call(lw->sd_enc, video, querystd, std);
+	else {
+		*std = fh->cur_norm->std;
+		return 0;
+	}
+}
+
+static int timblogiw_enum_framesizes(struct file *file, void  *priv,
+	struct v4l2_frmsizeenum *fsize)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = priv;
+
+	dev_dbg(&vdev->dev, "%s - index: %d, format: %d\n",  __func__,
+		fsize->index, fsize->pixel_format);
+
+	if ((fsize->index != 0) ||
+		(fsize->pixel_format != V4L2_PIX_FMT_UYVY))
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width = fh->cur_norm->width;
+	fsize->discrete.height = fh->cur_norm->height;
+
+	return 0;
+}
+
+/* Video buffer functions */
+
+static int buffer_setup(struct videobuf_queue *vq, unsigned int *count,
+	unsigned int *size)
+{
+	struct timblogiw_fh *fh = vq->priv_data;
+
+	*size = timblogiw_frame_size(fh->cur_norm);
+
+	if (!*count)
+		*count = 32;
+
+	while (*size * *count > TIMBLOGIW_MAX_VIDEO_MEM * 1024 * 1024)
+		(*count)--;
+
+	return 0;
+}
+
+static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
+	enum v4l2_field field)
+{
+	struct timblogiw_fh *fh = vq->priv_data;
+	struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+		vb);
+	unsigned int data_size = timblogiw_frame_size(fh->cur_norm);
+	int err = 0;
+
+	if (vb->baddr && vb->bsize < data_size)
+		/* User provided buffer, but it is too small */
+		return -ENOMEM;
+
+	vb->size = data_size;
+	vb->width = fh->cur_norm->width;
+	vb->height = fh->cur_norm->height;
+	vb->field = field;
+
+	if (vb->state == VIDEOBUF_NEEDS_INIT) {
+		int i;
+		unsigned int size;
+		unsigned int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC *
+			timblogiw_bytes_per_line(fh->cur_norm);
+		dma_addr_t addr;
+
+		sg_init_table(buf->sg, ARRAY_SIZE(buf->sg));
+
+		err = videobuf_iolock(vq, vb, NULL);
+		if (err)
+			goto err;
+
+		addr = videobuf_to_dma_contig(vb);
+		for (i = 0, size = 0; size < data_size; i++) {
+			sg_dma_address(buf->sg + i) = addr + size;
+			size += bytes_per_desc;
+			sg_dma_len(buf->sg + i) = (size > data_size) ?
+				(bytes_per_desc - (size - data_size)) :
+				bytes_per_desc;
+		}
+
+		vb->state = VIDEOBUF_PREPARED;
+		buf->cookie = -1;
+		buf->fh = fh;
+	}
+
+	return 0;
+
+err:
+	videobuf_dma_contig_free(vq, vb);
+	vb->state = VIDEOBUF_NEEDS_INIT;
+	return err;
+}
+
+static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+	struct timblogiw_fh *fh = vq->priv_data;
+	struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+		vb);
+	struct dma_async_tx_descriptor *desc;
+	int sg_elems;
+	int bytes_per_desc = TIMBLOGIW_LINES_PER_DESC *
+		timblogiw_bytes_per_line(fh->cur_norm);
+
+	sg_elems = timblogiw_frame_size(fh->cur_norm) / bytes_per_desc;
+	sg_elems +=
+		(timblogiw_frame_size(fh->cur_norm) % bytes_per_desc) ? 1 : 0;
+
+	if (list_empty(&fh->capture))
+		vb->state = VIDEOBUF_ACTIVE;
+	else
+		vb->state = VIDEOBUF_QUEUED;
+
+	list_add_tail(&vb->queue, &fh->capture);
+
+	spin_unlock_irq(&fh->queue_lock);
+
+	desc = fh->chan->device->device_prep_slave_sg(fh->chan,
+		buf->sg, sg_elems, DMA_FROM_DEVICE,
+		DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
+	if (!desc) {
+		spin_lock_irq(&fh->queue_lock);
+		list_del_init(&vb->queue);
+		vb->state = VIDEOBUF_PREPARED;
+		return;
+	}
+
+	desc->callback_param = buf;
+	desc->callback = timblogiw_dma_cb;
+
+	buf->cookie = desc->tx_submit(desc);
+
+	spin_lock_irq(&fh->queue_lock);
+}
+
+static void buffer_release(struct videobuf_queue *vq,
+	struct videobuf_buffer *vb)
+{
+	struct timblogiw_fh *fh = vq->priv_data;
+	struct timblogiw_buffer *buf = container_of(vb, struct timblogiw_buffer,
+		vb);
+
+	videobuf_waiton(vq, vb, 0, 0);
+	if (buf->cookie >= 0)
+		dma_sync_wait(fh->chan, buf->cookie);
+
+	videobuf_dma_contig_free(vq, vb);
+	vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static struct videobuf_queue_ops timblogiw_video_qops = {
+	.buf_setup      = buffer_setup,
+	.buf_prepare    = buffer_prepare,
+	.buf_queue      = buffer_queue,
+	.buf_release    = buffer_release,
+};
+
+/* Device Operations functions */
+
+static int timblogiw_open(struct file *file)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh;
+	v4l2_std_id std;
+	dma_cap_mask_t mask;
+	int err = 0;
+
+	dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+	mutex_lock(&lw->lock);
+	if (lw->opened) {
+		err = -EBUSY;
+		goto out;
+	}
+
+	if (TIMBLOGIW_HAS_DECODER(lw) && !lw->sd_enc) {
+		struct i2c_adapter *adapt;
+
+		/* find the video decoder */
+		adapt = i2c_get_adapter(lw->pdata.i2c_adapter);
+		if (!adapt) {
+			dev_err(&vdev->dev, "No I2C bus #%d\n",
+				lw->pdata.i2c_adapter);
+			err = -ENODEV;
+			goto out;
+		}
+
+		/* now find the encoder */
+		lw->sd_enc = v4l2_i2c_new_subdev_board(&lw->v4l2_dev, adapt,
+			lw->pdata.encoder.info, NULL);
+
+		i2c_put_adapter(adapt);
+
+		if (!lw->sd_enc) {
+			dev_err(&vdev->dev, "Failed to get encoder: %s\n",
+				lw->pdata.encoder.module_name);
+			err = -ENODEV;
+			goto out;
+		}
+	}
+
+	fh = kzalloc(sizeof(*fh), GFP_KERNEL);
+	if (!fh) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	fh->cur_norm = timblogiw_tvnorms;
+	timblogiw_querystd(file, fh, &std);
+	fh->cur_norm = timblogiw_get_norm(std);
+
+	INIT_LIST_HEAD(&fh->capture);
+	spin_lock_init(&fh->queue_lock);
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+	dma_cap_set(DMA_PRIVATE, mask);
+
+	/* find the DMA channel */
+	fh->chan = dma_request_channel(mask, timblogiw_dma_filter_fn,
+			(void *)(uintptr_t)lw->pdata.dma_channel);
+	if (!fh->chan) {
+		dev_err(&vdev->dev, "Failed to get DMA channel\n");
+		kfree(fh);
+		err = -ENODEV;
+		goto out;
+	}
+
+	file->private_data = fh;
+	videobuf_queue_dma_contig_init(&fh->vb_vidq,
+		&timblogiw_video_qops, lw->dev, &fh->queue_lock,
+		V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
+		sizeof(struct timblogiw_buffer), fh, NULL);
+
+	lw->opened = true;
+out:
+	mutex_unlock(&lw->lock);
+
+	return err;
+}
+
+static int timblogiw_close(struct file *file)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw *lw = video_get_drvdata(vdev);
+	struct timblogiw_fh *fh = file->private_data;
+
+	dev_dbg(&vdev->dev, "%s: Entry\n",  __func__);
+
+	videobuf_stop(&fh->vb_vidq);
+	videobuf_mmap_free(&fh->vb_vidq);
+
+	dma_release_channel(fh->chan);
+
+	kfree(fh);
+
+	mutex_lock(&lw->lock);
+	lw->opened = false;
+	mutex_unlock(&lw->lock);
+	return 0;
+}
+
+static ssize_t timblogiw_read(struct file *file, char __user *data,
+	size_t count, loff_t *ppos)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = file->private_data;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_read_stream(&fh->vb_vidq, data, count, ppos, 0,
+		file->f_flags & O_NONBLOCK);
+}
+
+static unsigned int timblogiw_poll(struct file *file,
+	struct poll_table_struct *wait)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = file->private_data;
+
+	dev_dbg(&vdev->dev, "%s: entry\n",  __func__);
+
+	return videobuf_poll_stream(file, &fh->vb_vidq, wait);
+}
+
+static int timblogiw_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct video_device *vdev = video_devdata(file);
+	struct timblogiw_fh *fh = file->private_data;
+
+	dev_dbg(&vdev->dev, "%s: entry\n", __func__);
+
+	return videobuf_mmap_mapper(&fh->vb_vidq, vma);
+}
+
+/* Platform device functions */
+
+static __devinitconst struct v4l2_ioctl_ops timblogiw_ioctl_ops = {
+	.vidioc_querycap		= timblogiw_querycap,
+	.vidioc_enum_fmt_vid_cap	= timblogiw_enum_fmt,
+	.vidioc_g_fmt_vid_cap		= timblogiw_g_fmt,
+	.vidioc_try_fmt_vid_cap		= timblogiw_try_fmt,
+	.vidioc_s_fmt_vid_cap		= timblogiw_s_fmt,
+	.vidioc_g_parm			= timblogiw_g_parm,
+	.vidioc_reqbufs			= timblogiw_reqbufs,
+	.vidioc_querybuf		= timblogiw_querybuf,
+	.vidioc_qbuf			= timblogiw_qbuf,
+	.vidioc_dqbuf			= timblogiw_dqbuf,
+	.vidioc_g_std			= timblogiw_g_std,
+	.vidioc_s_std			= timblogiw_s_std,
+	.vidioc_enum_input		= timblogiw_enuminput,
+	.vidioc_g_input			= timblogiw_g_input,
+	.vidioc_s_input			= timblogiw_s_input,
+	.vidioc_streamon		= timblogiw_streamon,
+	.vidioc_streamoff		= timblogiw_streamoff,
+	.vidioc_querystd		= timblogiw_querystd,
+	.vidioc_enum_framesizes		= timblogiw_enum_framesizes,
+};
+
+static __devinitconst struct v4l2_file_operations timblogiw_fops = {
+	.owner		= THIS_MODULE,
+	.open		= timblogiw_open,
+	.release	= timblogiw_close,
+	.unlocked_ioctl		= video_ioctl2, /* V4L2 ioctl handler */
+	.mmap		= timblogiw_mmap,
+	.read		= timblogiw_read,
+	.poll		= timblogiw_poll,
+};
+
+static __devinitconst struct video_device timblogiw_template = {
+	.name		= TIMBLOGIWIN_NAME,
+	.fops		= &timblogiw_fops,
+	.ioctl_ops	= &timblogiw_ioctl_ops,
+	.release	= video_device_release_empty,
+	.minor		= -1,
+	.tvnorms	= V4L2_STD_PAL | V4L2_STD_NTSC
+};
+
+static int __devinit timblogiw_probe(struct platform_device *pdev)
+{
+	int err;
+	struct timblogiw *lw = NULL;
+	struct timb_video_platform_data *pdata = pdev->dev.platform_data;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform data\n");
+		err = -EINVAL;
+		goto err;
+	}
+
+	if (!pdata->encoder.module_name)
+		dev_info(&pdev->dev, "Running without decoder\n");
+
+	lw = kzalloc(sizeof(*lw), GFP_KERNEL);
+	if (!lw) {
+		err = -ENOMEM;
+		goto err;
+	}
+
+	if (pdev->dev.parent)
+		lw->dev = pdev->dev.parent;
+	else
+		lw->dev = &pdev->dev;
+
+	memcpy(&lw->pdata, pdata, sizeof(lw->pdata));
+
+	mutex_init(&lw->lock);
+
+	lw->video_dev = timblogiw_template;
+
+	strlcpy(lw->v4l2_dev.name, DRIVER_NAME, sizeof(lw->v4l2_dev.name));
+	err = v4l2_device_register(NULL, &lw->v4l2_dev);
+	if (err)
+		goto err_register;
+
+	lw->video_dev.v4l2_dev = &lw->v4l2_dev;
+
+	platform_set_drvdata(pdev, lw);
+	video_set_drvdata(&lw->video_dev, lw);
+
+	err = video_register_device(&lw->video_dev, VFL_TYPE_GRABBER, 0);
+	if (err) {
+		dev_err(&pdev->dev, "Error reg video: %d\n", err);
+		goto err_request;
+	}
+
+
+	return 0;
+
+err_request:
+	platform_set_drvdata(pdev, NULL);
+	v4l2_device_unregister(&lw->v4l2_dev);
+err_register:
+	kfree(lw);
+err:
+	dev_err(&pdev->dev, "Failed to register: %d\n", err);
+
+	return err;
+}
+
+static int __devexit timblogiw_remove(struct platform_device *pdev)
+{
+	struct timblogiw *lw = platform_get_drvdata(pdev);
+
+	video_unregister_device(&lw->video_dev);
+
+	v4l2_device_unregister(&lw->v4l2_dev);
+
+	kfree(lw);
+
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver timblogiw_platform_driver = {
+	.driver = {
+		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= timblogiw_probe,
+	.remove		= __devexit_p(timblogiw_remove),
+};
+
+/* Module functions */
+
+static int __init timblogiw_init(void)
+{
+	return platform_driver_register(&timblogiw_platform_driver);
+}
+
+static void __exit timblogiw_exit(void)
+{
+	platform_driver_unregister(&timblogiw_platform_driver);
+}
+
+module_init(timblogiw_init);
+module_exit(timblogiw_exit);
+
+MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
+MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRIVER_NAME);