V4L/DVB: Add closed captioning support for the HVR-950q

Add NTSC closed captioning support for au0828 based products.  Note that this
also required reworking the locking to support streaming on both the video and
VBI devices (the logic for which I copied from my changes made to the em28xx
several months ago).

This work was sponsored by GetWellNetwork Inc.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/au0828/Makefile

-au0828-objs	:= au0828-core.o au0828-i2c.o au0828-cards.o au0828-dvb.o au0828-video.o
+au0828-objs	:= au0828-core.o au0828-i2c.o au0828-cards.o au0828-dvb.o au0828-video.o au0828-vbi.o
 
 obj-$(CONFIG_VIDEO_AU0828) += au0828.o
 

drivers/media/video/au0828/au0828-vbi.c

+/*
+   au0828-vbi.c - VBI driver for au0828
+
+   Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
+
+   This work was sponsored by GetWellNetwork Inc.
+
+   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.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+#include "au0828.h"
+
+static unsigned int vbibufs = 5;
+module_param(vbibufs, int, 0644);
+MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
+
+/* ------------------------------------------------------------------ */
+
+static void
+free_buffer(struct videobuf_queue *vq, struct au0828_buffer *buf)
+{
+	struct au0828_fh     *fh  = vq->priv_data;
+	struct au0828_dev    *dev = fh->dev;
+	unsigned long flags = 0;
+	if (in_interrupt())
+		BUG();
+
+	/* We used to wait for the buffer to finish here, but this didn't work
+	   because, as we were keeping the state as VIDEOBUF_QUEUED,
+	   videobuf_queue_cancel marked it as finished for us.
+	   (Also, it could wedge forever if the hardware was misconfigured.)
+
+	   This should be safe; by the time we get here, the buffer isn't
+	   queued anymore. If we ever start marking the buffers as
+	   VIDEOBUF_ACTIVE, it won't be, though.
+	*/
+	spin_lock_irqsave(&dev->slock, flags);
+	if (dev->isoc_ctl.vbi_buf == buf)
+		dev->isoc_ctl.vbi_buf = NULL;
+	spin_unlock_irqrestore(&dev->slock, flags);
+
+	videobuf_vmalloc_free(&buf->vb);
+	buf->vb.state = VIDEOBUF_NEEDS_INIT;
+}
+
+static int
+vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
+{
+	struct au0828_fh     *fh  = q->priv_data;
+	struct au0828_dev    *dev = fh->dev;
+
+	*size = dev->vbi_width * dev->vbi_height * 2;
+
+	if (0 == *count)
+		*count = vbibufs;
+	if (*count < 2)
+		*count = 2;
+	if (*count > 32)
+		*count = 32;
+	return 0;
+}
+
+static int
+vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
+	    enum v4l2_field field)
+{
+	struct au0828_fh     *fh  = q->priv_data;
+	struct au0828_dev    *dev = fh->dev;
+	struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
+	int                  rc = 0;
+
+	buf->vb.size = dev->vbi_width * dev->vbi_height * 2;
+
+	if (0 != buf->vb.baddr  &&  buf->vb.bsize < buf->vb.size)
+		return -EINVAL;
+
+	buf->vb.width  = dev->vbi_width;
+	buf->vb.height = dev->vbi_height;
+	buf->vb.field  = field;
+
+	if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
+		rc = videobuf_iolock(q, &buf->vb, NULL);
+		if (rc < 0)
+			goto fail;
+	}
+
+	buf->vb.state = VIDEOBUF_PREPARED;
+	return 0;
+
+fail:
+	free_buffer(q, buf);
+	return rc;
+}
+
+static void
+vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
+{
+	struct au0828_buffer    *buf     = container_of(vb,
+							struct au0828_buffer,
+							vb);
+	struct au0828_fh        *fh      = vq->priv_data;
+	struct au0828_dev       *dev     = fh->dev;
+	struct au0828_dmaqueue  *vbiq    = &dev->vbiq;
+
+	buf->vb.state = VIDEOBUF_QUEUED;
+	list_add_tail(&buf->vb.queue, &vbiq->active);
+}
+
+static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+	struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb);
+	free_buffer(q, buf);
+}
+
+struct videobuf_queue_ops au0828_vbi_qops = {
+	.buf_setup    = vbi_setup,
+	.buf_prepare  = vbi_prepare,
+	.buf_queue    = vbi_queue,
+	.buf_release  = vbi_release,
+};

drivers/media/video/au0828/au0828-video.c

@@ -314,6 +314,23 @@ static inline void buffer_filled(struct au0828_dev *dev,
 	wake_up(&buf->vb.done);
 }
 
+static inline void vbi_buffer_filled(struct au0828_dev *dev,
+				     struct au0828_dmaqueue *dma_q,
+				     struct au0828_buffer *buf)
+{
+	/* Advice that buffer was filled */
+	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
+
+	buf->vb.state = VIDEOBUF_DONE;
+	buf->vb.field_count++;
+	do_gettimeofday(&buf->vb.ts);
+
+	dev->isoc_ctl.vbi_buf = NULL;
+
+	list_del(&buf->vb.queue);
+	wake_up(&buf->vb.done);
+}
+
 /*
  * Identify the buffer header type and properly handles
  */
@@ -327,6 +344,9 @@ static void au0828_copy_video(struct au0828_dev *dev,
 	int  linesdone, currlinedone, offset, lencopy, remain;
 	int bytesperline = dev->width << 1; /* Assumes 16-bit depth @@@@ */
 
+	if (len == 0)
+		return;
+
 	if (dma_q->pos + len > buf->vb.size)
 		len = buf->vb.size - dma_q->pos;
 
@@ -414,17 +434,96 @@ static inline void get_next_buf(struct au0828_dmaqueue *dma_q,
 	return;
 }
 
+static void au0828_copy_vbi(struct au0828_dev *dev,
+			      struct au0828_dmaqueue  *dma_q,
+			      struct au0828_buffer *buf,
+			      unsigned char *p,
+			      unsigned char *outp, unsigned long len)
+{
+	unsigned char *startwrite, *startread;
+	int bytesperline = dev->vbi_width;
+	int i, j = 0;
+
+	if (dev == NULL) {
+		au0828_isocdbg("dev is null\n");
+		return;
+	}
+
+	if (dma_q == NULL) {
+		au0828_isocdbg("dma_q is null\n");
+		return;
+	}
+	if (buf == NULL)
+		return;
+	if (p == NULL) {
+		au0828_isocdbg("p is null\n");
+		return;
+	}
+	if (outp == NULL) {
+		au0828_isocdbg("outp is null\n");
+		return;
+	}
+
+	if (dma_q->pos + len > buf->vb.size)
+		len = buf->vb.size - dma_q->pos;
+
+	startread = p;
+	startwrite = outp + (dma_q->pos / 2);
+
+	/* Make sure the bottom field populates the second half of the frame */
+	if (buf->top_field == 0)
+		startwrite += bytesperline * dev->vbi_height;
+
+	for (i = 0; i < len; i += 2)
+		startwrite[j++] = startread[i+1];
+
+	dma_q->pos += len;
+}
+
+
+/*
+ * video-buf generic routine to get the next available VBI buffer
+ */
+static inline void vbi_get_next_buf(struct au0828_dmaqueue *dma_q,
+				    struct au0828_buffer **buf)
+{
+	struct au0828_dev *dev = container_of(dma_q, struct au0828_dev, vbiq);
+	char *outp;
+
+	if (list_empty(&dma_q->active)) {
+		au0828_isocdbg("No active queue to serve\n");
+		dev->isoc_ctl.vbi_buf = NULL;
+		*buf = NULL;
+		return;
+	}
+
+	/* Get the next buffer */
+	*buf = list_entry(dma_q->active.next, struct au0828_buffer, vb.queue);
+	/* Cleans up buffer - Usefull for testing for frame/URB loss */
+	outp = videobuf_to_vmalloc(&(*buf)->vb);
+	memset(outp, 0x00, (*buf)->vb.size);
+
+	dev->isoc_ctl.vbi_buf = *buf;
+
+	return;
+}
+
 /*
  * Controls the isoc copy of each urb packet
  */
 static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
 {
 	struct au0828_buffer    *buf;
+	struct au0828_buffer    *vbi_buf;
 	struct au0828_dmaqueue  *dma_q = urb->context;
+	struct au0828_dmaqueue  *vbi_dma_q = &dev->vbiq;
 	unsigned char *outp = NULL;
+	unsigned char *vbioutp = NULL;
 	int i, len = 0, rc = 1;
 	unsigned char *p;
 	unsigned char fbyte;
+	unsigned int vbi_field_size;
+	unsigned int remain, lencopy;
 
 	if (!dev)
 		return 0;
@@ -443,6 +542,10 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
 	if (buf != NULL)
 		outp = videobuf_to_vmalloc(&buf->vb);
 
+	vbi_buf = dev->isoc_ctl.vbi_buf;
+	if (vbi_buf != NULL)
+		vbioutp = videobuf_to_vmalloc(&vbi_buf->vb);
+
 	for (i = 0; i < urb->number_of_packets; i++) {
 		int status = urb->iso_frame_desc[i].status;
 
@@ -472,6 +575,19 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
 			au0828_isocdbg("Video frame %s\n",
 				       (fbyte & 0x40) ? "odd" : "even");
 			if (!(fbyte & 0x40)) {
+				/* VBI */
+				if (vbi_buf != NULL)
+					vbi_buffer_filled(dev,
+							  vbi_dma_q,
+							  vbi_buf);
+				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
+				if (vbi_buf == NULL)
+					vbioutp = NULL;
+				else
+					vbioutp = videobuf_to_vmalloc(
+						&vbi_buf->vb);
+
+				/* Video */
 				if (buf != NULL)
 					buffer_filled(dev, dma_q, buf);
 				get_next_buf(dma_q, &buf);
@@ -488,9 +604,36 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
 					buf->top_field = 0;
 			}
 
+			if (vbi_buf != NULL) {
+				if (fbyte & 0x40)
+					vbi_buf->top_field = 1;
+				else
+					vbi_buf->top_field = 0;
+			}
+
+			dev->vbi_read = 0;
+			vbi_dma_q->pos = 0;
 			dma_q->pos = 0;
 		}
-		if (buf != NULL)
+
+		vbi_field_size = dev->vbi_width * dev->vbi_height * 2;
+		if (dev->vbi_read < vbi_field_size) {
+			remain  = vbi_field_size - dev->vbi_read;
+			if (len < remain)
+				lencopy = len;
+			else
+				lencopy = remain;
+
+			if (vbi_buf != NULL)
+				au0828_copy_vbi(dev, vbi_dma_q, vbi_buf, p,
+						vbioutp, len);
+
+			len -= lencopy;
+			p += lencopy;
+			dev->vbi_read += lencopy;
+		}
+
+		if (dev->vbi_read >= vbi_field_size && buf != NULL)
 			au0828_copy_video(dev, dma_q, buf, p, outp, len);
 	}
 	return rc;
@@ -642,7 +785,7 @@ int au0828_analog_stream_enable(struct au0828_dev *d)
 	au0828_writereg(d, 0x114, 0xa0);
 	au0828_writereg(d, 0x115, 0x05);
 	/* set y position */
-	au0828_writereg(d, 0x112, 0x02);
+	au0828_writereg(d, 0x112, 0x00);
 	au0828_writereg(d, 0x113, 0x00);
 	au0828_writereg(d, 0x116, 0xf2);
 	au0828_writereg(d, 0x117, 0x00);
@@ -703,47 +846,83 @@ void au0828_analog_unregister(struct au0828_dev *dev)
 
 
 /* Usage lock check functions */
-static int res_get(struct au0828_fh *fh)
+static int res_get(struct au0828_fh *fh, unsigned int bit)
 {
 	struct au0828_dev    *dev = fh->dev;
-	int		 rc   = 0;
 
-	/* This instance already has stream_on */
-	if (fh->stream_on)
-		return rc;
+	if (fh->resources & bit)
+		/* have it already allocated */
+		return 1;
 
-	if (dev->stream_on)
-		return -EBUSY;
+	/* is it free? */
+	mutex_lock(&dev->lock);
+	if (dev->resources & bit) {
+		/* no, someone else uses it */
+		mutex_unlock(&dev->lock);
+		return 0;
+	}
+	/* it's free, grab it */
+	fh->resources  |= bit;
+	dev->resources |= bit;
+	dprintk(1, "res: get %d\n", bit);
+	mutex_unlock(&dev->lock);
+	return 1;
+}
 
-	dev->stream_on = 1;
-	fh->stream_on  = 1;
-	return rc;
+static int res_check(struct au0828_fh *fh, unsigned int bit)
+{
+	return fh->resources & bit;
 }
 
-static int res_check(struct au0828_fh *fh)
+static int res_locked(struct au0828_dev *dev, unsigned int bit)
 {
-	return fh->stream_on;
+	return dev->resources & bit;
 }
 
-static void res_free(struct au0828_fh *fh)
+static void res_free(struct au0828_fh *fh, unsigned int bits)
 {
 	struct au0828_dev    *dev = fh->dev;
 
-	fh->stream_on = 0;
-	dev->stream_on = 0;
+	BUG_ON((fh->resources & bits) != bits);
+
+	mutex_lock(&dev->lock);
+	fh->resources  &= ~bits;
+	dev->resources &= ~bits;
+	dprintk(1, "res: put %d\n", bits);
+	mutex_unlock(&dev->lock);
+}
+
+static int get_ressource(struct au0828_fh *fh)
+{
+	switch (fh->type) {
+	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+		return AU0828_RESOURCE_VIDEO;
+	case V4L2_BUF_TYPE_VBI_CAPTURE:
+		return AU0828_RESOURCE_VBI;
+	default:
+		BUG();
+		return 0;
+	}
 }
 
 static int au0828_v4l2_open(struct file *filp)
 {
 	int ret = 0;
+	struct video_device *vdev = video_devdata(filp);
 	struct au0828_dev *dev = video_drvdata(filp);
 	struct au0828_fh *fh;
-	int type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	int type;
 
-#ifdef VBI_IS_WORKING
-	if (video_devdata(filp)->vfl_type == VFL_TYPE_GRABBER)
+	switch (vdev->vfl_type) {
+	case VFL_TYPE_GRABBER:
+		type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+		break;
+	case VFL_TYPE_VBI:
 		type = V4L2_BUF_TYPE_VBI_CAPTURE;
-#endif
+		break;
+	default:
+		return -EINVAL;
+	}
 
 	fh = kzalloc(sizeof(struct au0828_fh), GFP_KERNEL);
 	if (NULL == fh) {
@@ -781,10 +960,21 @@ static int au0828_v4l2_open(struct file *filp)
 	dev->users++;
 
 	videobuf_queue_vmalloc_init(&fh->vb_vidq, &au0828_video_qops,
-				    NULL, &dev->slock, fh->type,
+				    NULL, &dev->slock,
+				    V4L2_BUF_TYPE_VIDEO_CAPTURE,
 				    V4L2_FIELD_INTERLACED,
 				    sizeof(struct au0828_buffer), fh);
 
+	/* VBI Setup */
+	dev->vbi_width = 720;
+	dev->vbi_height = 1;
+	videobuf_queue_vmalloc_init(&fh->vb_vbiq, &au0828_vbi_qops,
+				    NULL, &dev->slock,
+				    V4L2_BUF_TYPE_VBI_CAPTURE,
+				    V4L2_FIELD_SEQ_TB,
+				    sizeof(struct au0828_buffer), fh);
+
+
 	return ret;
 }
 
@@ -794,17 +984,19 @@ static int au0828_v4l2_close(struct file *filp)
 	struct au0828_fh *fh = filp->private_data;
 	struct au0828_dev *dev = fh->dev;
 
-	mutex_lock(&dev->lock);
-	if (res_check(fh))
-		res_free(fh);
-
-	if (dev->users == 1) {
+	if (res_check(fh, AU0828_RESOURCE_VIDEO)) {
 		videobuf_stop(&fh->vb_vidq);
-		videobuf_mmap_free(&fh->vb_vidq);
+		res_free(fh, AU0828_RESOURCE_VIDEO);
+	}
 
+	if (res_check(fh, AU0828_RESOURCE_VBI)) {
+		videobuf_stop(&fh->vb_vbiq);
+		res_free(fh, AU0828_RESOURCE_VBI);
+	}
+
+	if (dev->users == 1) {
 		if (dev->dev_state & DEV_DISCONNECTED) {
 			au0828_analog_unregister(dev);
-			mutex_unlock(&dev->lock);
 			kfree(dev);
 			return 0;
 		}
@@ -823,10 +1015,11 @@ static int au0828_v4l2_close(struct file *filp)
 			printk(KERN_INFO "Au0828 can't set alternate to 0!\n");
 	}
 
+	videobuf_mmap_free(&fh->vb_vidq);
+	videobuf_mmap_free(&fh->vb_vbiq);
 	kfree(fh);
 	dev->users--;
 	wake_up_interruptible_nr(&dev->open, 1);
-	mutex_unlock(&dev->lock);
 	return 0;
 }
 
@@ -842,16 +1035,21 @@ static ssize_t au0828_v4l2_read(struct file *filp, char __user *buf,
 		return rc;
 
 	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
-		mutex_lock(&dev->lock);
-		rc = res_get(fh);
-		mutex_unlock(&dev->lock);
-
-		if (unlikely(rc < 0))
-			return rc;
+		if (res_locked(dev, AU0828_RESOURCE_VIDEO))
+			return -EBUSY;
 
 		return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
 					filp->f_flags & O_NONBLOCK);
 	}
+
+	if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		if (!res_get(fh, AU0828_RESOURCE_VBI))
+			return -EBUSY;
+
+		return videobuf_read_stream(&fh->vb_vbiq, buf, count, pos, 0,
+					    filp->f_flags & O_NONBLOCK);
+	}
+
 	return 0;
 }
 
@@ -865,17 +1063,17 @@ static unsigned int au0828_v4l2_poll(struct file *filp, poll_table *wait)
 	if (rc < 0)
 		return rc;
 
-	mutex_lock(&dev->lock);
-	rc = res_get(fh);
-	mutex_unlock(&dev->lock);
-
-	if (unlikely(rc < 0))
-		return POLLERR;
-
-	if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+		if (!res_get(fh, AU0828_RESOURCE_VIDEO))
 			return POLLERR;
-
 		return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
+	} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		if (!res_get(fh, AU0828_RESOURCE_VBI))
+			return POLLERR;
+		return videobuf_poll_stream(filp, &fh->vb_vbiq, wait);
+	} else {
+		return POLLERR;
+	}
 }
 
 static int au0828_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
@@ -888,14 +1086,10 @@ static int au0828_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (rc < 0)
 		return rc;
 
-	mutex_lock(&dev->lock);
-	rc = res_get(fh);
-	mutex_unlock(&dev->lock);
-
-	if (unlikely(rc < 0))
-		return rc;
-
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
+	else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
+		rc = videobuf_mmap_mapper(&fh->vb_vbiq, vma);
 
 	return rc;
 }
@@ -911,14 +1105,6 @@ static int au0828_set_format(struct au0828_dev *dev, unsigned int cmd,
 	maxwidth = 720;
 	maxheight = 480;
 
-#ifdef VBI_IS_WORKING
-	if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
-		dprintk(1, "VBI format set: to be supported!\n");
-		return 0;
-	}
-	if (format->type == V4L2_BUF_TYPE_VBI_CAPTURE)
-		return 0;
-#endif
 	if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
 
@@ -999,9 +1185,7 @@ static int vidioc_querycap(struct file *file, void  *priv,
 
 	/*set the device capabilities */
 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
-#ifdef VBI_IS_WORKING
 		V4L2_CAP_VBI_CAPTURE |
-#endif
 		V4L2_CAP_AUDIO |
 		V4L2_CAP_READWRITE |
 		V4L2_CAP_STREAMING |
@@ -1056,20 +1240,21 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
 	struct au0828_dev *dev = fh->dev;
 	int rc;
 
+	rc = check_dev(dev);
+	if (rc < 0)
+		return rc;
+
+	mutex_lock(&dev->lock);
+
 	if (videobuf_queue_is_busy(&fh->vb_vidq)) {
 		printk(KERN_INFO "%s queue busy\n", __func__);
 		rc = -EBUSY;
 		goto out;
 	}
 
-	if (dev->stream_on && !fh->stream_on) {
-		printk(KERN_INFO "%s device in use by another fh\n", __func__);
-		rc = -EBUSY;
-		goto out;
-	}
-
-	return au0828_set_format(dev, VIDIOC_S_FMT, f);
+	rc = au0828_set_format(dev, VIDIOC_S_FMT, f);
 out:
+	mutex_unlock(&dev->lock);
 	return rc;
 }
 
@@ -1300,6 +1485,29 @@ static int vidioc_s_frequency(struct file *file, void *priv,
 	return 0;
 }
 
+
+/* RAW VBI ioctls */
+
+static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
+				struct v4l2_format *format)
+{
+	struct au0828_fh      *fh  = priv;
+	struct au0828_dev     *dev = fh->dev;
+
+	format->fmt.vbi.samples_per_line = dev->vbi_width;
+	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
+	format->fmt.vbi.offset = 0;
+	format->fmt.vbi.flags = 0;
+	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
+
+	format->fmt.vbi.count[0] = dev->vbi_height;
+	format->fmt.vbi.count[1] = dev->vbi_height;
+	format->fmt.vbi.start[0] = 21;
+	format->fmt.vbi.start[1] = 284;
+
+	return 0;
+}
+
 static int vidioc_g_chip_ident(struct file *file, void *priv,
 	       struct v4l2_dbg_chip_ident *chip)
 {
@@ -1347,23 +1555,30 @@ static int vidioc_streamon(struct file *file, void *priv,
 {
 	struct au0828_fh      *fh  = priv;
 	struct au0828_dev     *dev = fh->dev;
-	int rc;
+	int                   rc = -EINVAL;
 
 	rc = check_dev(dev);
 	if (rc < 0)
 		return rc;
 
+	if (unlikely(type != fh->type))
+		return -EINVAL;
+
+	dprintk(1, "vidioc_streamon fh=%p t=%d fh->res=%d dev->res=%d\n",
+		fh, type, fh->resources, dev->resources);
+
+	if (unlikely(!res_get(fh, get_ressource(fh))))
+		return -EBUSY;
+
 	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 		au0828_analog_stream_enable(dev);
 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1);
 	}
 
-	mutex_lock(&dev->lock);
-	rc = res_get(fh);
-
-	if (likely(rc >= 0))
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		rc = videobuf_streamon(&fh->vb_vidq);
-	mutex_unlock(&dev->lock);
+	else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)
+		rc = videobuf_streamon(&fh->vb_vbiq);
 
 	return rc;
 }
@@ -1373,25 +1588,27 @@ static int vidioc_streamoff(struct file *file, void *priv,
 {
 	struct au0828_fh      *fh  = priv;
 	struct au0828_dev     *dev = fh->dev;
-	int i;
-	int ret;
 	int                   rc;
+	int                   i;
 
 	rc = check_dev(dev);
 	if (rc < 0)
 		return rc;
 
-	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+	if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+	    fh->type != V4L2_BUF_TYPE_VBI_CAPTURE)
 		return -EINVAL;
 	if (type != fh->type)
 		return -EINVAL;
 
-	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+	dprintk(1, "vidioc_streamoff fh=%p t=%d fh->res=%d dev->res=%d\n",
+		fh, type, fh->resources, dev->resources);
+
+	if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 		v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0);
-		ret = au0828_stream_interrupt(dev);
-		if (ret != 0)
-			return ret;
-	}
+		rc = au0828_stream_interrupt(dev);
+		if (rc != 0)
+			return rc;
 
 		for (i = 0; i < AU0828_MAX_INPUT; i++) {
 			if (AUVI_INPUT(i).audio_setup == NULL)
@@ -1399,10 +1616,12 @@ static int vidioc_streamoff(struct file *file, void *priv,
 			(AUVI_INPUT(i).audio_setup)(dev, 0);
 		}
 
-	mutex_lock(&dev->lock);
 		videobuf_streamoff(&fh->vb_vidq);
-	res_free(fh);
-	mutex_unlock(&dev->lock);
+		res_free(fh, AU0828_RESOURCE_VIDEO);
+	} else if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
+		videobuf_streamoff(&fh->vb_vbiq);
+		res_free(fh, AU0828_RESOURCE_VBI);
+	}
 
 	return 0;
 }
@@ -1527,19 +1746,11 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
 	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
 	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
 	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
-#ifdef VBI_IS_WORKING
 	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
-	.vidioc_try_fmt_vbi_cap     = vidioc_s_fmt_vbi_cap,
-	.vidioc_s_fmt_vbi_cap       = vidioc_s_fmt_vbi_cap,
-#endif
+	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
 	.vidioc_g_audio             = vidioc_g_audio,
 	.vidioc_s_audio             = vidioc_s_audio,
 	.vidioc_cropcap             = vidioc_cropcap,
-#ifdef VBI_IS_WORKING
-	.vidioc_g_fmt_sliced_vbi_cap   = vidioc_g_fmt_sliced_vbi_cap,
-	.vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
-	.vidioc_s_fmt_sliced_vbi_cap   = vidioc_try_set_sliced_vbi_cap,
-#endif
 	.vidioc_reqbufs             = vidioc_reqbufs,
 	.vidioc_querybuf            = vidioc_querybuf,
 	.vidioc_qbuf                = vidioc_qbuf,
@@ -1621,8 +1832,11 @@ int au0828_analog_register(struct au0828_dev *dev,
 	spin_lock_init(&dev->slock);
 	mutex_init(&dev->lock);
 
+	/* init video dma queues */
 	INIT_LIST_HEAD(&dev->vidq.active);
 	INIT_LIST_HEAD(&dev->vidq.queued);
+	INIT_LIST_HEAD(&dev->vbiq.active);
+	INIT_LIST_HEAD(&dev->vbiq.queued);
 
 	dev->width = NTSC_STD_W;
 	dev->height = NTSC_STD_H;
@@ -1638,26 +1852,23 @@ int au0828_analog_register(struct au0828_dev *dev,
 		return -ENOMEM;
 	}
 
-#ifdef VBI_IS_WORKING
+	/* allocate the VBI struct */
 	dev->vbi_dev = video_device_alloc();
 	if (NULL == dev->vbi_dev) {
 		dprintk(1, "Can't allocate vbi_device.\n");
 		kfree(dev->vdev);
 		return -ENOMEM;
 	}
-#endif
 
 	/* Fill the video capture device struct */
 	*dev->vdev = au0828_video_template;
 	dev->vdev->parent = &dev->usbdev->dev;
 	strcpy(dev->vdev->name, "au0828a video");
 
-#ifdef VBI_IS_WORKING
 	/* Setup the VBI device */
 	*dev->vbi_dev = au0828_video_template;
 	dev->vbi_dev->parent = &dev->usbdev->dev;
 	strcpy(dev->vbi_dev->name, "au0828a vbi");
-#endif
 
 	/* Register the v4l2 device */
 	video_set_drvdata(dev->vdev, dev);
@@ -1669,7 +1880,6 @@ int au0828_analog_register(struct au0828_dev *dev,
 		return -ENODEV;
 	}
 
-#ifdef VBI_IS_WORKING
 	/* Register the vbi device */
 	video_set_drvdata(dev->vbi_dev, dev);
 	retval = video_register_device(dev->vbi_dev, VFL_TYPE_VBI, -1);
@@ -1680,7 +1890,6 @@ int au0828_analog_register(struct au0828_dev *dev,
 		video_device_release(dev->vdev);
 		return -ENODEV;
 	}
-#endif
 
 	dprintk(1, "%s completed!\n", __func__);
 

drivers/media/video/au0828/au0828.h

@@ -60,6 +60,10 @@
 
 #define AU0828_MAX_INPUT        4
 
+/* au0828 resource types (used for res_get/res_lock etc */
+#define AU0828_RESOURCE_VIDEO 0x01
+#define AU0828_RESOURCE_VBI   0x02
+
 enum au0828_itype {
 	AU0828_VMUX_UNDEFINED = 0,
 	AU0828_VMUX_COMPOSITE,
@@ -115,8 +119,10 @@ enum au0828_dev_state {
 
 struct au0828_fh {
 	struct au0828_dev *dev;
-	unsigned int  stream_on:1;	/* Locks streams */
+	unsigned int  resources;
+
 	struct videobuf_queue        vb_vidq;
+	struct videobuf_queue        vb_vbiq;
 	enum v4l2_buf_type           type;
 };
 
@@ -146,6 +152,7 @@ struct au0828_usb_isoc_ctl {
 
 		/* Stores already requested buffers */
 	struct au0828_buffer		*buf;
+	struct au0828_buffer		*vbi_buf;
 
 		/* Stores the number of received fields */
 	int				nfields;
@@ -194,11 +201,14 @@ struct au0828_dev {
 	/* Analog */
 	struct v4l2_device v4l2_dev;
 	int users;
-	unsigned int stream_on:1;	/* Locks streams */
+	unsigned int resources;	/* resources in use */
 	struct video_device *vdev;
 	struct video_device *vbi_dev;
 	int width;
 	int height;
+	int vbi_width;
+	int vbi_height;
+	u32 vbi_read;
 	u32 field_size;
 	u32 frame_size;
 	u32 bytesperline;
@@ -219,6 +229,7 @@ struct au0828_dev {
 
 	/* Isoc control struct */
 	struct au0828_dmaqueue vidq;
+	struct au0828_dmaqueue vbiq;
 	struct au0828_usb_isoc_ctl isoc_ctl;
 	spinlock_t slock;
 
@@ -278,6 +289,9 @@ void au0828_analog_unregister(struct au0828_dev *dev);
 extern int au0828_dvb_register(struct au0828_dev *dev);
 extern void au0828_dvb_unregister(struct au0828_dev *dev);
 
+/* au0828-vbi.c */
+extern struct videobuf_queue_ops au0828_vbi_qops;
+
 #define dprintk(level, fmt, arg...)\
 	do { if (au0828_debug & level)\
 		printk(KERN_DEBUG DRIVER_NAME "/0: " fmt, ## arg);\