linux/drivers/media/common/saa7146_fops.c - nest-guard/1.0/linux - Git at Google

 #include <media/saa7146_vv.h>

 /****************************************************************************/
 /* resource management functions, shamelessly stolen from saa7134 driver */

 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
 {
 	struct saa7146_dev *dev = fh->dev;
 	struct saa7146_vv *vv = dev->vv_data;

 	if (fh->resources & bit) {
 		DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
 		/* have it already allocated */
 		return 1;
 	}

 	/* is it free? */
 	mutex_lock(&dev->lock);
 	if (vv->resources & bit) {
 		DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
 		/* no, someone else uses it */
 		mutex_unlock(&dev->lock);
 		return 0;
 	}
 	/* it's free, grab it */
 	fh->resources  |= bit;
 	vv->resources |= bit;
 	DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
 	mutex_unlock(&dev->lock);
 	return 1;
 }

 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
 {
 	struct saa7146_dev *dev = fh->dev;
 	struct saa7146_vv *vv = dev->vv_data;

 	BUG_ON((fh->resources & bits) != bits);

 	mutex_lock(&dev->lock);
 	fh->resources  &= ~bits;
 	vv->resources &= ~bits;
 	DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
 	mutex_unlock(&dev->lock);
 }


 /********************************************************************************/
 /* common dma functions */

 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
 						struct saa7146_buf *buf)
 {
 	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
 	DEB_EE(("dev:%p, buf:%p\n",dev,buf));

 	BUG_ON(in_interrupt());

 	videobuf_waiton(q, &buf->vb, 0, 0);
 	videobuf_dma_unmap(q->dev, dma);
 	videobuf_dma_free(dma);
 	buf->vb.state = VIDEOBUF_NEEDS_INIT;
 }


 /********************************************************************************/
 /* common buffer functions */

 int saa7146_buffer_queue(struct saa7146_dev *dev,
 			 struct saa7146_dmaqueue *q,
 			 struct saa7146_buf *buf)
 {
 	assert_spin_locked(&dev->slock);
 	DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));

 	BUG_ON(!q);

 	if (NULL == q->curr) {
 		q->curr = buf;
 		DEB_D(("immediately activating buffer %p\n", buf));
 		buf->activate(dev,buf,NULL);
 	} else {
 		list_add_tail(&buf->vb.queue,&q->queue);
 		buf->vb.state = VIDEOBUF_QUEUED;
 		DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
 	}
 	return 0;
 }

 void saa7146_buffer_finish(struct saa7146_dev *dev,
 			   struct saa7146_dmaqueue *q,
 			   int state)
 {
 	assert_spin_locked(&dev->slock);
 	DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
 	DEB_EE(("q->curr:%p\n",q->curr));

 	BUG_ON(!q->curr);

 	/* finish current buffer */
 	if (NULL == q->curr) {
 		DEB_D(("aiii. no current buffer\n"));
 		return;
 	}

 	q->curr->vb.state = state;
 	do_gettimeofday(&q->curr->vb.ts);
 	wake_up(&q->curr->vb.done);

 	q->curr = NULL;
 }

 void saa7146_buffer_next(struct saa7146_dev *dev,
 			 struct saa7146_dmaqueue *q, int vbi)
 {
 	struct saa7146_buf *buf,*next = NULL;

 	BUG_ON(!q);

 	DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));

 	assert_spin_locked(&dev->slock);
 	if (!list_empty(&q->queue)) {
 		/* activate next one from queue */
 		buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
 		list_del(&buf->vb.queue);
 		if (!list_empty(&q->queue))
 			next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
 		q->curr = buf;
 		DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
 		buf->activate(dev,buf,next);
 	} else {
 		DEB_INT(("no next buffer. stopping.\n"));
 		if( 0 != vbi ) {
 			/* turn off video-dma3 */
 			saa7146_write(dev,MC1, MASK_20);
 		} else {
 			/* nothing to do -- just prevent next video-dma1 transfer
 			   by lowering the protection address */

 			// fixme: fix this for vflip != 0

 			saa7146_write(dev, PROT_ADDR1, 0);
 			saa7146_write(dev, MC2, (MASK_02|MASK_18));

 			/* write the address of the rps-program */
 			saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
 			/* turn on rps */
 			saa7146_write(dev, MC1, (MASK_12 | MASK_28));

 /*
 			printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
 			printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
 			printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
 			printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
 			printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
 			printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
 */
 		}
 		del_timer(&q->timeout);
 	}
 }

 void saa7146_buffer_timeout(unsigned long data)
 {
 	struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
 	struct saa7146_dev *dev = q->dev;
 	unsigned long flags;

 	DEB_EE(("dev:%p, dmaq:%p\n", dev, q));

 	spin_lock_irqsave(&dev->slock,flags);
 	if (q->curr) {
 		DEB_D(("timeout on %p\n", q->curr));
 		saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
 	}

 	/* we don't restart the transfer here like other drivers do. when
 	   a streaming capture is disabled, the timeout function will be
 	   called for the current buffer. if we activate the next buffer now,
 	   we mess up our capture logic. if a timeout occurs on another buffer,
 	   then something is seriously broken before, so no need to buffer the
 	   next capture IMHO... */
 /*
 	saa7146_buffer_next(dev,q);
 */
 	spin_unlock_irqrestore(&dev->slock,flags);
 }

 /********************************************************************************/
 /* file operations */

 static int fops_open(struct file *file)
 {
 	struct video_device *vdev = video_devdata(file);
 	struct saa7146_dev *dev = video_drvdata(file);
 	struct saa7146_fh *fh = NULL;
 	int result = 0;

 	enum v4l2_buf_type type;

 	DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));

 	if (mutex_lock_interruptible(&saa7146_devices_lock))
 		return -ERESTARTSYS;

 	DEB_D(("using: %p\n",dev));

 	type = vdev->vfl_type == VFL_TYPE_GRABBER
 	     ? V4L2_BUF_TYPE_VIDEO_CAPTURE
 	     : V4L2_BUF_TYPE_VBI_CAPTURE;

 	/* check if an extension is registered */
 	if( NULL == dev->ext ) {
 		DEB_S(("no extension registered for this device.\n"));
 		result = -ENODEV;
 		goto out;
 	}

 	/* allocate per open data */
 	fh = kzalloc(sizeof(*fh),GFP_KERNEL);
 	if (NULL == fh) {
 		DEB_S(("cannot allocate memory for per open data.\n"));
 		result = -ENOMEM;
 		goto out;
 	}

 	file->private_data = fh;
 	fh->dev = dev;
 	fh->type = type;

 	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 		DEB_S(("initializing vbi...\n"));
 		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 			result = saa7146_vbi_uops.open(dev,file);
 		if (dev->ext_vv_data->vbi_fops.open)
 			dev->ext_vv_data->vbi_fops.open(file);
 	} else {
 		DEB_S(("initializing video...\n"));
 		result = saa7146_video_uops.open(dev,file);
 	}

 	if (0 != result) {
 		goto out;
 	}

 	if( 0 == try_module_get(dev->ext->module)) {
 		result = -EINVAL;
 		goto out;
 	}

 	result = 0;
 out:
 	if (fh && result != 0) {
 		kfree(fh);
 		file->private_data = NULL;
 	}
 	mutex_unlock(&saa7146_devices_lock);
 	return result;
 }

 static int fops_release(struct file *file)
 {
 	struct saa7146_fh  *fh  = file->private_data;
 	struct saa7146_dev *dev = fh->dev;

 	DEB_EE(("file:%p\n", file));

 	if (mutex_lock_interruptible(&saa7146_devices_lock))
 		return -ERESTARTSYS;

 	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 			saa7146_vbi_uops.release(dev,file);
 		if (dev->ext_vv_data->vbi_fops.release)
 			dev->ext_vv_data->vbi_fops.release(file);
 	} else {
 		saa7146_video_uops.release(dev,file);
 	}

 	module_put(dev->ext->module);
 	file->private_data = NULL;
 	kfree(fh);

 	mutex_unlock(&saa7146_devices_lock);

 	return 0;
 }

 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
 {
 	struct saa7146_fh *fh = file->private_data;
 	struct videobuf_queue *q;

 	switch (fh->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 		DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
 		q = &fh->video_q;
 		break;
 		}
 	case V4L2_BUF_TYPE_VBI_CAPTURE: {
 		DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
 		q = &fh->vbi_q;
 		break;
 		}
 	default:
 		BUG();
 		return 0;
 	}

 	return videobuf_mmap_mapper(q,vma);
 }

 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
 {
 	struct saa7146_fh *fh = file->private_data;
 	struct videobuf_buffer *buf = NULL;
 	struct videobuf_queue *q;

 	DEB_EE(("file:%p, poll:%p\n",file, wait));

 	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
 		if( 0 == fh->vbi_q.streaming )
 			return videobuf_poll_stream(file, &fh->vbi_q, wait);
 		q = &fh->vbi_q;
 	} else {
 		DEB_D(("using video queue.\n"));
 		q = &fh->video_q;
 	}

 	if (!list_empty(&q->stream))
 		buf = list_entry(q->stream.next, struct videobuf_buffer, stream);

 	if (!buf) {
 		DEB_D(("buf == NULL!\n"));
 		return POLLERR;
 	}

 	poll_wait(file, &buf->done, wait);
 	if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
 		DEB_D(("poll succeeded!\n"));
 		return POLLIN|POLLRDNORM;
 	}

 	DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
 	return 0;
 }

 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 {
 	struct saa7146_fh *fh = file->private_data;

 	switch (fh->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
 //		DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
 		return saa7146_video_uops.read(file,data,count,ppos);
 		}
 	case V4L2_BUF_TYPE_VBI_CAPTURE: {
 //		DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
 		if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 			return saa7146_vbi_uops.read(file,data,count,ppos);
 		else
 			return -EINVAL;
 		}
 		break;
 	default:
 		BUG();
 		return 0;
 	}
 }

 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
 {
 	struct saa7146_fh *fh = file->private_data;

 	switch (fh->type) {
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 		return -EINVAL;
 	case V4L2_BUF_TYPE_VBI_CAPTURE:
 		if (fh->dev->ext_vv_data->vbi_fops.write)
 			return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
 		else
 			return -EINVAL;
 	default:
 		BUG();
 		return -EINVAL;
 	}
 }

 static const struct v4l2_file_operations video_fops =
 {
 	.owner		= THIS_MODULE,
 	.open		= fops_open,
 	.release	= fops_release,
 	.read		= fops_read,
 	.write		= fops_write,
 	.poll		= fops_poll,
 	.mmap		= fops_mmap,
 	.ioctl		= video_ioctl2,
 };

 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 {
 	u32 isr = status;

 	DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));

 	if (0 != (isr & (MASK_27))) {
 		DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
 		saa7146_video_uops.irq_done(dev,isr);
 	}

 	if (0 != (isr & (MASK_28))) {
 		u32 mc2 = saa7146_read(dev, MC2);
 		if( 0 != (mc2 & MASK_15)) {
 			DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
 			wake_up(&dev->vv_data->vbi_wq);
 			saa7146_write(dev,MC2, MASK_31);
 			return;
 		}
 		DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
 		saa7146_vbi_uops.irq_done(dev,isr);
 	}
 }

 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 {
 	struct saa7146_vv *vv;
 	int err;

 	err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
 	if (err)
 		return err;

 	vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
 	if (vv == NULL) {
 		ERR(("out of memory. aborting.\n"));
 		return -ENOMEM;
 	}
 	ext_vv->ops = saa7146_video_ioctl_ops;
 	ext_vv->core_ops = &saa7146_video_ioctl_ops;

 	DEB_EE(("dev:%p\n",dev));

 	/* set default values for video parts of the saa7146 */
 	saa7146_write(dev, BCS_CTRL, 0x80400040);

 	/* enable video-port pins */
 	saa7146_write(dev, MC1, (MASK_10 | MASK_26));

 	/* save per-device extension data (one extension can
 	   handle different devices that might need different
 	   configuration data) */
 	dev->ext_vv_data = ext_vv;

 	vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
 	if( NULL == vv->d_clipping.cpu_addr ) {
 		ERR(("out of memory. aborting.\n"));
 		kfree(vv);
 		return -1;
 	}
 	memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);

 	saa7146_video_uops.init(dev,vv);
 	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 		saa7146_vbi_uops.init(dev,vv);

 	dev->vv_data = vv;
 	dev->vv_callback = &vv_callback;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(saa7146_vv_init);

 int saa7146_vv_release(struct saa7146_dev* dev)
 {
 	struct saa7146_vv *vv = dev->vv_data;

 	DEB_EE(("dev:%p\n",dev));

 	v4l2_device_unregister(&dev->v4l2_dev);
 	pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
 	kfree(vv);
 	dev->vv_data = NULL;
 	dev->vv_callback = NULL;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(saa7146_vv_release);

 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
 			    char *name, int type)
 {
 	struct video_device *vfd;
 	int err;
 	int i;

 	DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));

 	// released by vfd->release
 	vfd = video_device_alloc();
 	if (vfd == NULL)
 		return -ENOMEM;

 	vfd->fops = &video_fops;
 	vfd->ioctl_ops = &dev->ext_vv_data->ops;
 	vfd->release = video_device_release;
 	vfd->tvnorms = 0;
 	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 		vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
 	strlcpy(vfd->name, name, sizeof(vfd->name));
 	video_set_drvdata(vfd, dev);

 	err = video_register_device(vfd, type, -1);
 	if (err < 0) {
 		ERR(("cannot register v4l2 device. skipping.\n"));
 		video_device_release(vfd);
 		return err;
 	}

 	INFO(("%s: registered device %s [v4l2]\n",
 		dev->name, video_device_node_name(vfd)));

 	*vid = vfd;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(saa7146_register_device);

 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
 {
 	DEB_EE(("dev:%p\n",dev));

 	video_unregister_device(*vid);
 	*vid = NULL;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(saa7146_unregister_device);

 static int __init saa7146_vv_init_module(void)
 {
 	return 0;
 }


 static void __exit saa7146_vv_cleanup_module(void)
 {
 }

 module_init(saa7146_vv_init_module);
 module_exit(saa7146_vv_cleanup_module);

 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 MODULE_LICENSE("GPL");
	#include <media/saa7146_vv.h>

	/****************************************************************************/
	/* resource management functions, shamelessly stolen from saa7134 driver */

	int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
	{
	struct saa7146_dev *dev = fh->dev;
	struct saa7146_vv *vv = dev->vv_data;

	if (fh->resources & bit) {
	DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
	/* have it already allocated */
	return 1;
	}

	/* is it free? */
	mutex_lock(&dev->lock);
	if (vv->resources & bit) {
	DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
	/* no, someone else uses it */
	mutex_unlock(&dev->lock);
	return 0;
	}
	/* it's free, grab it */
	fh->resources \|= bit;
	vv->resources \|= bit;
	DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
	mutex_unlock(&dev->lock);
	return 1;
	}

	void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
	{
	struct saa7146_dev *dev = fh->dev;
	struct saa7146_vv *vv = dev->vv_data;

	BUG_ON((fh->resources & bits) != bits);

	mutex_lock(&dev->lock);
	fh->resources &= ~bits;
	vv->resources &= ~bits;
	DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
	mutex_unlock(&dev->lock);
	}


	/********************************************************************************/
	/* common dma functions */

	void saa7146_dma_free(struct saa7146_dev dev,struct videobuf_queue q,
	struct saa7146_buf *buf)
	{
	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
	DEB_EE(("dev:%p, buf:%p\n",dev,buf));

	BUG_ON(in_interrupt());

	videobuf_waiton(q, &buf->vb, 0, 0);
	videobuf_dma_unmap(q->dev, dma);
	videobuf_dma_free(dma);
	buf->vb.state = VIDEOBUF_NEEDS_INIT;
	}


	/********************************************************************************/
	/* common buffer functions */

	int saa7146_buffer_queue(struct saa7146_dev *dev,
	struct saa7146_dmaqueue *q,
	struct saa7146_buf *buf)
	{
	assert_spin_locked(&dev->slock);
	DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));

	BUG_ON(!q);

	if (NULL == q->curr) {
	q->curr = buf;
	DEB_D(("immediately activating buffer %p\n", buf));
	buf->activate(dev,buf,NULL);
	} else {
	list_add_tail(&buf->vb.queue,&q->queue);
	buf->vb.state = VIDEOBUF_QUEUED;
	DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
	}
	return 0;
	}

	void saa7146_buffer_finish(struct saa7146_dev *dev,
	struct saa7146_dmaqueue *q,
	int state)
	{
	assert_spin_locked(&dev->slock);
	DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
	DEB_EE(("q->curr:%p\n",q->curr));

	BUG_ON(!q->curr);

	/* finish current buffer */
	if (NULL == q->curr) {
	DEB_D(("aiii. no current buffer\n"));
	return;
	}

	q->curr->vb.state = state;
	do_gettimeofday(&q->curr->vb.ts);
	wake_up(&q->curr->vb.done);

	q->curr = NULL;
	}

	void saa7146_buffer_next(struct saa7146_dev *dev,
	struct saa7146_dmaqueue *q, int vbi)
	{
	struct saa7146_buf buf,next = NULL;

	BUG_ON(!q);

	DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));

	assert_spin_locked(&dev->slock);
	if (!list_empty(&q->queue)) {
	/* activate next one from queue */
	buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
	list_del(&buf->vb.queue);
	if (!list_empty(&q->queue))
	next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
	q->curr = buf;
	DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
	buf->activate(dev,buf,next);
	} else {
	DEB_INT(("no next buffer. stopping.\n"));
	if( 0 != vbi ) {
	/* turn off video-dma3 */
	saa7146_write(dev,MC1, MASK_20);
	} else {
	/* nothing to do -- just prevent next video-dma1 transfer
	by lowering the protection address */

	// fixme: fix this for vflip != 0

	saa7146_write(dev, PROT_ADDR1, 0);
	saa7146_write(dev, MC2, (MASK_02\|MASK_18));

	/* write the address of the rps-program */
	saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
	/* turn on rps */
	saa7146_write(dev, MC1, (MASK_12 \| MASK_28));

	/*
	printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
	printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
	printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
	printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
	printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
	printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
	*/
	}
	del_timer(&q->timeout);
	}
	}

	void saa7146_buffer_timeout(unsigned long data)
	{
	struct saa7146_dmaqueue q = (struct saa7146_dmaqueue)data;
	struct saa7146_dev *dev = q->dev;
	unsigned long flags;

	DEB_EE(("dev:%p, dmaq:%p\n", dev, q));

	spin_lock_irqsave(&dev->slock,flags);
	if (q->curr) {
	DEB_D(("timeout on %p\n", q->curr));
	saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
	}

	/* we don't restart the transfer here like other drivers do. when
	a streaming capture is disabled, the timeout function will be
	called for the current buffer. if we activate the next buffer now,
	we mess up our capture logic. if a timeout occurs on another buffer,
	then something is seriously broken before, so no need to buffer the
	next capture IMHO... */
	/*
	saa7146_buffer_next(dev,q);
	*/
	spin_unlock_irqrestore(&dev->slock,flags);
	}

	/********************************************************************************/
	/* file operations */

	static int fops_open(struct file *file)
	{
	struct video_device *vdev = video_devdata(file);
	struct saa7146_dev *dev = video_drvdata(file);
	struct saa7146_fh *fh = NULL;
	int result = 0;

	enum v4l2_buf_type type;

	DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));

	if (mutex_lock_interruptible(&saa7146_devices_lock))
	return -ERESTARTSYS;

	DEB_D(("using: %p\n",dev));

	type = vdev->vfl_type == VFL_TYPE_GRABBER
	? V4L2_BUF_TYPE_VIDEO_CAPTURE
	: V4L2_BUF_TYPE_VBI_CAPTURE;

	/* check if an extension is registered */
	if( NULL == dev->ext ) {
	DEB_S(("no extension registered for this device.\n"));
	result = -ENODEV;
	goto out;
	}

	/* allocate per open data */
	fh = kzalloc(sizeof(*fh),GFP_KERNEL);
	if (NULL == fh) {
	DEB_S(("cannot allocate memory for per open data.\n"));
	result = -ENOMEM;
	goto out;
	}

	file->private_data = fh;
	fh->dev = dev;
	fh->type = type;

	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
	DEB_S(("initializing vbi...\n"));
	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	result = saa7146_vbi_uops.open(dev,file);
	if (dev->ext_vv_data->vbi_fops.open)
	dev->ext_vv_data->vbi_fops.open(file);
	} else {
	DEB_S(("initializing video...\n"));
	result = saa7146_video_uops.open(dev,file);
	}

	if (0 != result) {
	goto out;
	}

	if( 0 == try_module_get(dev->ext->module)) {
	result = -EINVAL;
	goto out;
	}

	result = 0;
	out:
	if (fh && result != 0) {
	kfree(fh);
	file->private_data = NULL;
	}
	mutex_unlock(&saa7146_devices_lock);
	return result;
	}

	static int fops_release(struct file *file)
	{
	struct saa7146_fh *fh = file->private_data;
	struct saa7146_dev *dev = fh->dev;

	DEB_EE(("file:%p\n", file));

	if (mutex_lock_interruptible(&saa7146_devices_lock))
	return -ERESTARTSYS;

	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	saa7146_vbi_uops.release(dev,file);
	if (dev->ext_vv_data->vbi_fops.release)
	dev->ext_vv_data->vbi_fops.release(file);
	} else {
	saa7146_video_uops.release(dev,file);
	}

	module_put(dev->ext->module);
	file->private_data = NULL;
	kfree(fh);

	mutex_unlock(&saa7146_devices_lock);

	return 0;
	}

	static int fops_mmap(struct file file, struct vm_area_struct vma)
	{
	struct saa7146_fh *fh = file->private_data;
	struct videobuf_queue *q;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
	DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
	q = &fh->video_q;
	break;
	}
	case V4L2_BUF_TYPE_VBI_CAPTURE: {
	DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
	q = &fh->vbi_q;
	break;
	}
	default:
	BUG();
	return 0;
	}

	return videobuf_mmap_mapper(q,vma);
	}

	static unsigned int fops_poll(struct file file, struct poll_table_struct wait)
	{
	struct saa7146_fh *fh = file->private_data;
	struct videobuf_buffer *buf = NULL;
	struct videobuf_queue *q;

	DEB_EE(("file:%p, poll:%p\n",file, wait));

	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
	if( 0 == fh->vbi_q.streaming )
	return videobuf_poll_stream(file, &fh->vbi_q, wait);
	q = &fh->vbi_q;
	} else {
	DEB_D(("using video queue.\n"));
	q = &fh->video_q;
	}

	if (!list_empty(&q->stream))
	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);

	if (!buf) {
	DEB_D(("buf == NULL!\n"));
	return POLLERR;
	}

	poll_wait(file, &buf->done, wait);
	if (buf->state == VIDEOBUF_DONE \|\| buf->state == VIDEOBUF_ERROR) {
	DEB_D(("poll succeeded!\n"));
	return POLLIN\|POLLRDNORM;
	}

	DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
	return 0;
	}

	static ssize_t fops_read(struct file file, char __user data, size_t count, loff_t *ppos)
	{
	struct saa7146_fh *fh = file->private_data;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
	// DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
	return saa7146_video_uops.read(file,data,count,ppos);
	}
	case V4L2_BUF_TYPE_VBI_CAPTURE: {
	// DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
	if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	return saa7146_vbi_uops.read(file,data,count,ppos);
	else
	return -EINVAL;
	}
	break;
	default:
	BUG();
	return 0;
	}
	}

	static ssize_t fops_write(struct file file, const char __user data, size_t count, loff_t *ppos)
	{
	struct saa7146_fh *fh = file->private_data;

	switch (fh->type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	return -EINVAL;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
	if (fh->dev->ext_vv_data->vbi_fops.write)
	return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
	else
	return -EINVAL;
	default:
	BUG();
	return -EINVAL;
	}
	}

	static const struct v4l2_file_operations video_fops =
	{
	.owner = THIS_MODULE,
	.open = fops_open,
	.release = fops_release,
	.read = fops_read,
	.write = fops_write,
	.poll = fops_poll,
	.mmap = fops_mmap,
	.ioctl = video_ioctl2,
	};

	static void vv_callback(struct saa7146_dev *dev, unsigned long status)
	{
	u32 isr = status;

	DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));

	if (0 != (isr & (MASK_27))) {
	DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
	saa7146_video_uops.irq_done(dev,isr);
	}

	if (0 != (isr & (MASK_28))) {
	u32 mc2 = saa7146_read(dev, MC2);
	if( 0 != (mc2 & MASK_15)) {
	DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
	wake_up(&dev->vv_data->vbi_wq);
	saa7146_write(dev,MC2, MASK_31);
	return;
	}
	DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
	saa7146_vbi_uops.irq_done(dev,isr);
	}
	}

	int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
	{
	struct saa7146_vv *vv;
	int err;

	err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
	if (err)
	return err;

	vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
	if (vv == NULL) {
	ERR(("out of memory. aborting.\n"));
	return -ENOMEM;
	}
	ext_vv->ops = saa7146_video_ioctl_ops;
	ext_vv->core_ops = &saa7146_video_ioctl_ops;

	DEB_EE(("dev:%p\n",dev));

	/* set default values for video parts of the saa7146 */
	saa7146_write(dev, BCS_CTRL, 0x80400040);

	/* enable video-port pins */
	saa7146_write(dev, MC1, (MASK_10 \| MASK_26));

	/* save per-device extension data (one extension can
	handle different devices that might need different
	configuration data) */
	dev->ext_vv_data = ext_vv;

	vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
	if( NULL == vv->d_clipping.cpu_addr ) {
	ERR(("out of memory. aborting.\n"));
	kfree(vv);
	return -1;
	}
	memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);

	saa7146_video_uops.init(dev,vv);
	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	saa7146_vbi_uops.init(dev,vv);

	dev->vv_data = vv;
	dev->vv_callback = &vv_callback;

	return 0;
	}
	EXPORT_SYMBOL_GPL(saa7146_vv_init);

	int saa7146_vv_release(struct saa7146_dev* dev)
	{
	struct saa7146_vv *vv = dev->vv_data;

	DEB_EE(("dev:%p\n",dev));

	v4l2_device_unregister(&dev->v4l2_dev);
	pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
	kfree(vv);
	dev->vv_data = NULL;
	dev->vv_callback = NULL;

	return 0;
	}
	EXPORT_SYMBOL_GPL(saa7146_vv_release);

	int saa7146_register_device(struct video_device *vid, struct saa7146_dev dev,
	char *name, int type)
	{
	struct video_device *vfd;
	int err;
	int i;

	DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));

	// released by vfd->release
	vfd = video_device_alloc();
	if (vfd == NULL)
	return -ENOMEM;

	vfd->fops = &video_fops;
	vfd->ioctl_ops = &dev->ext_vv_data->ops;
	vfd->release = video_device_release;
	vfd->tvnorms = 0;
	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
	vfd->tvnorms \|= dev->ext_vv_data->stds[i].id;
	strlcpy(vfd->name, name, sizeof(vfd->name));
	video_set_drvdata(vfd, dev);

	err = video_register_device(vfd, type, -1);
	if (err < 0) {
	ERR(("cannot register v4l2 device. skipping.\n"));
	video_device_release(vfd);
	return err;
	}

	INFO(("%s: registered device %s [v4l2]\n",
	dev->name, video_device_node_name(vfd)));

	*vid = vfd;
	return 0;
	}
	EXPORT_SYMBOL_GPL(saa7146_register_device);

	int saa7146_unregister_device(struct video_device *vid, struct saa7146_dev dev)
	{
	DEB_EE(("dev:%p\n",dev));

	video_unregister_device(*vid);
	*vid = NULL;

	return 0;
	}
	EXPORT_SYMBOL_GPL(saa7146_unregister_device);

	static int __init saa7146_vv_init_module(void)
	{
	return 0;
	}


	static void __exit saa7146_vv_cleanup_module(void)
	{
	}

	module_init(saa7146_vv_init_module);
	module_exit(saa7146_vv_cleanup_module);

	MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
	MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
	MODULE_LICENSE("GPL");