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

Pull media updates from Mauro Carvalho Chehab:
 "The first part of the media updates for Kernel 3.7.

  This series contain:

   - A major tree renaming patch series: now, drivers are organized
     internally by their used bus, instead of by V4L2 and/or DVB API,
     providing a cleaner driver location for hybrid drivers that
     implement both APIs, and allowing to cleanup the Kconfig items and
     make them more intuitive for the end user;

   - Media Kernel developers are typically very lazy with their duties
     of keeping the MAINTAINERS entries for their drivers updated.  As
     now the tree is more organized, we're doing an effort to add/update
     those entries for the drivers that aren't currently orphan;

   - Several DVB USB drivers got moved to a new DVB USB v2 core; the new
     core fixes several bugs (as the existing one that got bitroted).
     Now, suspend/resume finally started to work fine (at least with
     some devices - we should expect more work with regards to it);

   - added multistream support for DVB-T2, and unified the API for
     DVB-S2 and ISDB-S.  Backward binary support is preserved;

   - as usual, a few new drivers, some V4L2 core improvements and lots
     of drivers improvements and fixes.

  There are some points to notice on this series:

   1) you should expect a trivial merge conflict on your tree, with the
      removal of Documentation/feature-removal-schedule.txt: this series
      would be adding two additional entries there.  I opted to not
      rebase it due to this recent change;

   2) With regards to the PCTV 520e udev-related breakage, I opted to
      fix it in a way that the patches can be backported to 3.5 even
      without your firmware fix patch.  This way, Greg doesn't need to
      rush backporting your patch (as there are still the firmware cache
      and firmware path customization issues to be addressed there).

      I'll send later a patch (likely after the end of the merge window)
      reverting the rest of the DRX-K async firmware request, fully
      restoring its original behaviour to allow media drivers to
      initialize everything serialized as before for 3.7 and upper.

   3) I'm planning to work on this weekend to test the DMABUF patches
      for V4L2.  The patches are on my queue for several Kernel cycles,
      but, up to now, there is/was no way to test the series locally.

      I have some concerns about this particular changeset with regards
      to security issues, and with regards to the replacement of the old
      VIDIOC_OVERLAY ioctl's that is broken on modern systems, due to
      GPU drivers change.  The Overlay API allows direct PCI2PCI
      transfers from a media capture card into the GPU framebuffer, but
      its API is crappy.  Also, the only existing X11 driver that
      implements it requires a XV extension that is not available
      anymore on modern drivers.  The DMABUF can do the same thing, but
      with it is promising to be a properly-designed API.  If I can
      successfully test this series and be happy with it, I should be
      asking you to pull them next week."

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (717 commits)
  em28xx: regression fix: use DRX-K sync firmware requests on em28xx
  drxk: allow loading firmware synchrousnously
  em28xx: Make all em28xx extensions to be initialized asynchronously
  [media] tda18271: properly report read errors in tda18271_get_id
  [media] tda18271: delay IR & RF calibration until init() if delay_cal is set
  [media] MAINTAINERS: add Michael Krufky as tda827x maintainer
  [media] MAINTAINERS: add Michael Krufky as tda8290 maintainer
  [media] MAINTAINERS: add Michael Krufky as cxusb maintainer
  [media] MAINTAINERS: add Michael Krufky as lg2160 maintainer
  [media] MAINTAINERS: add Michael Krufky as lgdt3305 maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl111sf maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl5007t maintainer
  [media] MAINTAINERS: add Michael Krufky as tda18271 maintainer
  [media] s5p-tv: Report only multi-plane capabilities in vidioc_querycap
  [media] s5p-mfc: Fix misplaced return statement in s5p_mfc_suspend()
  [media] exynos-gsc: Add missing static storage class specifiers
  [media] exynos-gsc: Remove <linux/version.h> header file inclusion
  [media] s5p-fimc: Fix incorrect condition in fimc_lite_reqbufs()
  [media] s5p-tv: Fix potential NULL pointer dereference error
  [media] s5k6aa: Fix possible NULL pointer dereference
  ...

1 files changed, 880 insertions, 0 deletions

diff --git a/drivers/media/platform/timblogiw.c b/drivers/media/platform/timblogiw.c
new file mode 100644
index 000000000000..02194c056b00
--- /dev/null
+++ b/drivers/media/platform/timblogiw.c
@@ -0,0 +1,880 @@
+/*
+ * 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/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 <linux/module.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 = dmaengine_prep_slave_sg(fh->chan,
+		buf->sg, sg_elems, DMA_DEV_TO_MEM,
+		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_platform_driver(timblogiw_platform_driver);
+
+MODULE_DESCRIPTION(TIMBLOGIWIN_NAME);
+MODULE_AUTHOR("Pelagicore AB <info@pelagicore.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:"DRIVER_NAME);