[net-next-2.6.git] / drivers / media / common / saa7146_fops.c

#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");
Commit	Line	Data
1da177e4	1	#include <media/saa7146_vv.h>
1da177e4	2
1da177e4 LT	3	/****************************************************************************/
	4	/* resource management functions, shamelessly stolen from saa7134 driver */
	5
	6	int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
	7	{
	8	struct saa7146_dev *dev = fh->dev;
	9	struct saa7146_vv *vv = dev->vv_data;
	10
	11	if (fh->resources & bit) {
	12	DEB_D(("already allocated! want: 0x%02x, cur:0x%02x\n",bit,vv->resources));
	13	/* have it already allocated */
	14	return 1;
	15	}
	16
	17	/* is it free? */
3593cab5	18	mutex_lock(&dev->lock);
1da177e4 LT	19	if (vv->resources & bit) {
	20	DEB_D(("locked! vv->resources:0x%02x, we want:0x%02x\n",vv->resources,bit));
	21	/* no, someone else uses it */
3593cab5	22	mutex_unlock(&dev->lock);
1da177e4 LT	23	return 0;
	24	}
	25	/* it's free, grab it */
	26	fh->resources \|= bit;
	27	vv->resources \|= bit;
	28	DEB_D(("res: get 0x%02x, cur:0x%02x\n",bit,vv->resources));
3593cab5	29	mutex_unlock(&dev->lock);
1da177e4 LT	30	return 1;
	31	}
	32
	33	void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
	34	{
	35	struct saa7146_dev *dev = fh->dev;
	36	struct saa7146_vv *vv = dev->vv_data;
	37
ae24601b	38	BUG_ON((fh->resources & bits) != bits);
1da177e4	39
3593cab5	40	mutex_lock(&dev->lock);
1da177e4 LT	41	fh->resources &= ~bits;
	42	vv->resources &= ~bits;
	43	DEB_D(("res: put 0x%02x, cur:0x%02x\n",bits,vv->resources));
3593cab5	44	mutex_unlock(&dev->lock);
1da177e4 LT	45	}
	46
	47
	48	/********************************************************************************/
	49	/* common dma functions */
	50
c7b0ac05 MCC	51	void saa7146_dma_free(struct saa7146_dev dev,struct videobuf_queue q,
c7b0ac05 MCC	52	struct saa7146_buf *buf)
1da177e4	53	{
c1accaa2	54	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
1da177e4 LT	55	DEB_EE(("dev:%p, buf:%p\n",dev,buf));
1da177e4 LT	56
ae24601b	57	BUG_ON(in_interrupt());
1da177e4	58
0e0809a5	59	videobuf_waiton(q, &buf->vb, 0, 0);
95268403	60	videobuf_dma_unmap(q->dev, dma);
c1accaa2	61	videobuf_dma_free(dma);
0fc0686e	62	buf->vb.state = VIDEOBUF_NEEDS_INIT;
1da177e4 LT	63	}
	64
	65
	66	/********************************************************************************/
	67	/* common buffer functions */
	68
	69	int saa7146_buffer_queue(struct saa7146_dev *dev,
	70	struct saa7146_dmaqueue *q,
	71	struct saa7146_buf *buf)
	72	{
	73	assert_spin_locked(&dev->slock);
	74	DEB_EE(("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf));
	75
	76	BUG_ON(!q);
	77
	78	if (NULL == q->curr) {
	79	q->curr = buf;
	80	DEB_D(("immediately activating buffer %p\n", buf));
	81	buf->activate(dev,buf,NULL);
	82	} else {
	83	list_add_tail(&buf->vb.queue,&q->queue);
0fc0686e	84	buf->vb.state = VIDEOBUF_QUEUED;
1da177e4 LT	85	DEB_D(("adding buffer %p to queue. (active buffer present)\n", buf));
	86	}
	87	return 0;
	88	}
	89
	90	void saa7146_buffer_finish(struct saa7146_dev *dev,
	91	struct saa7146_dmaqueue *q,
	92	int state)
	93	{
	94	assert_spin_locked(&dev->slock);
	95	DEB_EE(("dev:%p, dmaq:%p, state:%d\n", dev, q, state));
	96	DEB_EE(("q->curr:%p\n",q->curr));
	97
	98	BUG_ON(!q->curr);
	99
	100	/* finish current buffer */
	101	if (NULL == q->curr) {
	102	DEB_D(("aiii. no current buffer\n"));
afd1a0c9	103	return;
1da177e4	104	}
afd1a0c9	105
1da177e4 LT	106	q->curr->vb.state = state;
	107	do_gettimeofday(&q->curr->vb.ts);
	108	wake_up(&q->curr->vb.done);
	109
	110	q->curr = NULL;
	111	}
	112
	113	void saa7146_buffer_next(struct saa7146_dev *dev,
	114	struct saa7146_dmaqueue *q, int vbi)
	115	{
	116	struct saa7146_buf buf,next = NULL;
	117
	118	BUG_ON(!q);
	119
	120	DEB_INT(("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi));
	121
	122	assert_spin_locked(&dev->slock);
	123	if (!list_empty(&q->queue)) {
	124	/* activate next one from queue */
	125	buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
	126	list_del(&buf->vb.queue);
	127	if (!list_empty(&q->queue))
	128	next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
	129	q->curr = buf;
	130	DEB_INT(("next buffer: buf:%p, prev:%p, next:%p\n", buf, q->queue.prev,q->queue.next));
	131	buf->activate(dev,buf,next);
	132	} else {
	133	DEB_INT(("no next buffer. stopping.\n"));
	134	if( 0 != vbi ) {
	135	/* turn off video-dma3 */
	136	saa7146_write(dev,MC1, MASK_20);
	137	} else {
	138	/* nothing to do -- just prevent next video-dma1 transfer
	139	by lowering the protection address */
	140
	141	// fixme: fix this for vflip != 0
	142
	143	saa7146_write(dev, PROT_ADDR1, 0);
afd1a0c9	144	saa7146_write(dev, MC2, (MASK_02\|MASK_18));
1da177e4 LT	145
	146	/* write the address of the rps-program */
	147	saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
	148	/* turn on rps */
	149	saa7146_write(dev, MC1, (MASK_12 \| MASK_28));
afd1a0c9	150
1da177e4 LT	151	/*
	152	printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
	153	printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
	154	printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
	155	printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
	156	printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1));
	157	printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
	158	*/
	159	}
	160	del_timer(&q->timeout);
	161	}
	162	}
	163
	164	void saa7146_buffer_timeout(unsigned long data)
	165	{
	166	struct saa7146_dmaqueue q = (struct saa7146_dmaqueue)data;
	167	struct saa7146_dev *dev = q->dev;
	168	unsigned long flags;
	169
	170	DEB_EE(("dev:%p, dmaq:%p\n", dev, q));
	171
	172	spin_lock_irqsave(&dev->slock,flags);
	173	if (q->curr) {
	174	DEB_D(("timeout on %p\n", q->curr));
0fc0686e	175	saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
1da177e4 LT	176	}
	177
	178	/* we don't restart the transfer here like other drivers do. when
	179	a streaming capture is disabled, the timeout function will be
	180	called for the current buffer. if we activate the next buffer now,
	181	we mess up our capture logic. if a timeout occurs on another buffer,
	182	then something is seriously broken before, so no need to buffer the
	183	next capture IMHO... */
	184	/*
	185	saa7146_buffer_next(dev,q);
	186	*/
	187	spin_unlock_irqrestore(&dev->slock,flags);
	188	}
	189
	190	/********************************************************************************/
	191	/* file operations */
	192
bec43661	193	static int fops_open(struct file *file)
1da177e4	194	{
63b0d5ad LP	195	struct video_device *vdev = video_devdata(file);
63b0d5ad LP	196	struct saa7146_dev *dev = video_drvdata(file);
1da177e4 LT	197	struct saa7146_fh *fh = NULL;
	198	int result = 0;
	199
63b0d5ad	200	enum v4l2_buf_type type;
1da177e4	201
50462eb0	202	DEB_EE(("file:%p, dev:%s\n", file, video_device_node_name(vdev)));
1da177e4	203
3593cab5	204	if (mutex_lock_interruptible(&saa7146_devices_lock))
1da177e4 LT	205	return -ERESTARTSYS;
1da177e4 LT	206
1da177e4 LT	207	DEB_D(("using: %p\n",dev));
1da177e4 LT	208
63b0d5ad LP	209	type = vdev->vfl_type == VFL_TYPE_GRABBER
	210	? V4L2_BUF_TYPE_VIDEO_CAPTURE
	211	: V4L2_BUF_TYPE_VBI_CAPTURE;
	212
1da177e4 LT	213	/* check if an extension is registered */
	214	if( NULL == dev->ext ) {
	215	DEB_S(("no extension registered for this device.\n"));
	216	result = -ENODEV;
	217	goto out;
	218	}
	219
	220	/* allocate per open data */
7408187d	221	fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1da177e4 LT	222	if (NULL == fh) {
	223	DEB_S(("cannot allocate memory for per open data.\n"));
	224	result = -ENOMEM;
	225	goto out;
	226	}
afd1a0c9	227
1da177e4 LT	228	file->private_data = fh;
	229	fh->dev = dev;
	230	fh->type = type;
	231
	232	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
	233	DEB_S(("initializing vbi...\n"));
5b0fa4ff OE	234	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	235	result = saa7146_vbi_uops.open(dev,file);
	236	if (dev->ext_vv_data->vbi_fops.open)
bec43661	237	dev->ext_vv_data->vbi_fops.open(file);
1da177e4 LT	238	} else {
	239	DEB_S(("initializing video...\n"));
	240	result = saa7146_video_uops.open(dev,file);
	241	}
	242
	243	if (0 != result) {
	244	goto out;
	245	}
	246
	247	if( 0 == try_module_get(dev->ext->module)) {
	248	result = -EINVAL;
	249	goto out;
	250	}
	251
	252	result = 0;
	253	out:
5fa1247a	254	if (fh && result != 0) {
1da177e4 LT	255	kfree(fh);
	256	file->private_data = NULL;
	257	}
3593cab5	258	mutex_unlock(&saa7146_devices_lock);
afd1a0c9	259	return result;
1da177e4 LT	260	}
1da177e4 LT	261
bec43661	262	static int fops_release(struct file *file)
1da177e4 LT	263	{
	264	struct saa7146_fh *fh = file->private_data;
	265	struct saa7146_dev *dev = fh->dev;
	266
bec43661	267	DEB_EE(("file:%p\n", file));
1da177e4	268
3593cab5	269	if (mutex_lock_interruptible(&saa7146_devices_lock))
1da177e4 LT	270	return -ERESTARTSYS;
	271
	272	if( fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
5b0fa4ff OE	273	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	274	saa7146_vbi_uops.release(dev,file);
	275	if (dev->ext_vv_data->vbi_fops.release)
bec43661	276	dev->ext_vv_data->vbi_fops.release(file);
1da177e4 LT	277	} else {
	278	saa7146_video_uops.release(dev,file);
	279	}
	280
	281	module_put(dev->ext->module);
	282	file->private_data = NULL;
	283	kfree(fh);
	284
3593cab5	285	mutex_unlock(&saa7146_devices_lock);
1da177e4 LT	286
	287	return 0;
	288	}
	289
1da177e4 LT	290	static int fops_mmap(struct file file, struct vm_area_struct vma)
	291	{
	292	struct saa7146_fh *fh = file->private_data;
	293	struct videobuf_queue *q;
	294
	295	switch (fh->type) {
	296	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
	297	DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",file, vma));
	298	q = &fh->video_q;
	299	break;
	300	}
	301	case V4L2_BUF_TYPE_VBI_CAPTURE: {
	302	DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",file, vma));
	303	q = &fh->vbi_q;
	304	break;
	305	}
	306	default:
	307	BUG();
	308	return 0;
	309	}
50c25fff	310
1da177e4 LT	311	return videobuf_mmap_mapper(q,vma);
	312	}
	313
	314	static unsigned int fops_poll(struct file file, struct poll_table_struct wait)
	315	{
	316	struct saa7146_fh *fh = file->private_data;
	317	struct videobuf_buffer *buf = NULL;
	318	struct videobuf_queue *q;
	319
	320	DEB_EE(("file:%p, poll:%p\n",file, wait));
	321
	322	if (V4L2_BUF_TYPE_VBI_CAPTURE == fh->type) {
	323	if( 0 == fh->vbi_q.streaming )
	324	return videobuf_poll_stream(file, &fh->vbi_q, wait);
	325	q = &fh->vbi_q;
	326	} else {
	327	DEB_D(("using video queue.\n"));
	328	q = &fh->video_q;
	329	}
	330
	331	if (!list_empty(&q->stream))
	332	buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
	333
	334	if (!buf) {
	335	DEB_D(("buf == NULL!\n"));
	336	return POLLERR;
	337	}
	338
	339	poll_wait(file, &buf->done, wait);
0fc0686e	340	if (buf->state == VIDEOBUF_DONE \|\| buf->state == VIDEOBUF_ERROR) {
1da177e4 LT	341	DEB_D(("poll succeeded!\n"));
	342	return POLLIN\|POLLRDNORM;
	343	}
	344
	345	DEB_D(("nothing to poll for, buf->state:%d\n",buf->state));
	346	return 0;
	347	}
	348
	349	static ssize_t fops_read(struct file file, char __user data, size_t count, loff_t *ppos)
	350	{
	351	struct saa7146_fh *fh = file->private_data;
	352
	353	switch (fh->type) {
	354	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
	355	// DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", file, data, (unsigned long)count));
	356	return saa7146_video_uops.read(file,data,count,ppos);
	357	}
	358	case V4L2_BUF_TYPE_VBI_CAPTURE: {
	359	// DEB_EE(("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", file, data, (unsigned long)count));
5b0fa4ff OE	360	if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
	361	return saa7146_vbi_uops.read(file,data,count,ppos);
	362	else
	363	return -EINVAL;
1da177e4 LT	364	}
	365	break;
	366	default:
	367	BUG();
	368	return 0;
	369	}
	370	}
	371
5b0fa4ff OE	372	static ssize_t fops_write(struct file file, const char __user data, size_t count, loff_t *ppos)
	373	{
	374	struct saa7146_fh *fh = file->private_data;
	375
	376	switch (fh->type) {
	377	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
	378	return -EINVAL;
	379	case V4L2_BUF_TYPE_VBI_CAPTURE:
	380	if (fh->dev->ext_vv_data->vbi_fops.write)
	381	return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
	382	else
	383	return -EINVAL;
	384	default:
	385	BUG();
	386	return -EINVAL;
	387	}
	388	}
	389
bec43661	390	static const struct v4l2_file_operations video_fops =
1da177e4 LT	391	{
	392	.owner = THIS_MODULE,
	393	.open = fops_open,
	394	.release = fops_release,
	395	.read = fops_read,
5b0fa4ff	396	.write = fops_write,
1da177e4 LT	397	.poll = fops_poll,
1da177e4 LT	398	.mmap = fops_mmap,
b960074f	399	.ioctl = video_ioctl2,
1da177e4 LT	400	};
1da177e4 LT	401
52c1da39	402	static void vv_callback(struct saa7146_dev *dev, unsigned long status)
1da177e4 LT	403	{
1da177e4 LT	404	u32 isr = status;
afd1a0c9	405
1da177e4 LT	406	DEB_INT(("dev:%p, isr:0x%08x\n",dev,(u32)status));
	407
	408	if (0 != (isr & (MASK_27))) {
	409	DEB_INT(("irq: RPS0 (0x%08x).\n",isr));
	410	saa7146_video_uops.irq_done(dev,isr);
	411	}
	412
	413	if (0 != (isr & (MASK_28))) {
	414	u32 mc2 = saa7146_read(dev, MC2);
	415	if( 0 != (mc2 & MASK_15)) {
	416	DEB_INT(("irq: RPS1 vbi workaround (0x%08x).\n",isr));
	417	wake_up(&dev->vv_data->vbi_wq);
	418	saa7146_write(dev,MC2, MASK_31);
	419	return;
	420	}
	421	DEB_INT(("irq: RPS1 (0x%08x).\n",isr));
	422	saa7146_vbi_uops.irq_done(dev,isr);
	423	}
	424	}
	425
1da177e4 LT	426	int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
1da177e4 LT	427	{
230b65f9	428	struct saa7146_vv *vv;
03b1930e HV	429	int err;
	430
	431	err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
	432	if (err)
	433	return err;
230b65f9 HV	434
230b65f9 HV	435	vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
b960074f	436	if (vv == NULL) {
1da177e4	437	ERR(("out of memory. aborting.\n"));
230b65f9	438	return -ENOMEM;
1da177e4	439	}
b960074f HV	440	ext_vv->ops = saa7146_video_ioctl_ops;
b960074f HV	441	ext_vv->core_ops = &saa7146_video_ioctl_ops;
1da177e4 LT	442
	443	DEB_EE(("dev:%p\n",dev));
	444
	445	/* set default values for video parts of the saa7146 */
	446	saa7146_write(dev, BCS_CTRL, 0x80400040);
	447
	448	/* enable video-port pins */
	449	saa7146_write(dev, MC1, (MASK_10 \| MASK_26));
	450
	451	/* save per-device extension data (one extension can
	452	handle different devices that might need different
	453	configuration data) */
	454	dev->ext_vv_data = ext_vv;
afd1a0c9	455
afd1a0c9	456	vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
1da177e4 LT	457	if( NULL == vv->d_clipping.cpu_addr ) {
	458	ERR(("out of memory. aborting.\n"));
	459	kfree(vv);
	460	return -1;
	461	}
	462	memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
	463
	464	saa7146_video_uops.init(dev,vv);
5b0fa4ff OE	465	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
5b0fa4ff OE	466	saa7146_vbi_uops.init(dev,vv);
afd1a0c9	467
1da177e4 LT	468	dev->vv_data = vv;
	469	dev->vv_callback = &vv_callback;
	470
	471	return 0;
	472	}
5d7dc8c4	473	EXPORT_SYMBOL_GPL(saa7146_vv_init);
1da177e4 LT	474
	475	int saa7146_vv_release(struct saa7146_dev* dev)
	476	{
	477	struct saa7146_vv *vv = dev->vv_data;
	478
	479	DEB_EE(("dev:%p\n",dev));
afd1a0c9	480
230b65f9	481	v4l2_device_unregister(&dev->v4l2_dev);
58af0045	482	pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
afd1a0c9	483	kfree(vv);
1da177e4 LT	484	dev->vv_data = NULL;
1da177e4 LT	485	dev->vv_callback = NULL;
afd1a0c9	486
1da177e4 LT	487	return 0;
1da177e4 LT	488	}
5d7dc8c4	489	EXPORT_SYMBOL_GPL(saa7146_vv_release);
1da177e4 LT	490
	491	int saa7146_register_device(struct video_device *vid, struct saa7146_dev dev,
	492	char *name, int type)
	493	{
1da177e4	494	struct video_device *vfd;
b960074f	495	int err;
d0852ed2	496	int i;
1da177e4 LT	497
	498	DEB_EE(("dev:%p, name:'%s', type:%d\n",dev,name,type));
	499
	500	// released by vfd->release
afd1a0c9	501	vfd = video_device_alloc();
1da177e4 LT	502	if (vfd == NULL)
	503	return -ENOMEM;
	504
b960074f	505	vfd->fops = &video_fops;
d0852ed2	506	vfd->ioctl_ops = &dev->ext_vv_data->ops;
1da177e4	507	vfd->release = video_device_release;
d0852ed2 HV	508	vfd->tvnorms = 0;
	509	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
	510	vfd->tvnorms \|= dev->ext_vv_data->stds[i].id;
b960074f	511	strlcpy(vfd->name, name, sizeof(vfd->name));
601e9444	512	video_set_drvdata(vfd, dev);
1da177e4	513
b960074f HV	514	err = video_register_device(vfd, type, -1);
b960074f HV	515	if (err < 0) {
1da177e4	516	ERR(("cannot register v4l2 device. skipping.\n"));
a2a9b1ec	517	video_device_release(vfd);
b960074f	518	return err;
1da177e4 LT	519	}
1da177e4 LT	520
38c7c036 LP	521	INFO(("%s: registered device %s [v4l2]\n",
38c7c036 LP	522	dev->name, video_device_node_name(vfd)));
1da177e4 LT	523
	524	*vid = vfd;
	525	return 0;
	526	}
5d7dc8c4	527	EXPORT_SYMBOL_GPL(saa7146_register_device);
1da177e4 LT	528
	529	int saa7146_unregister_device(struct video_device *vid, struct saa7146_dev dev)
	530	{
1da177e4 LT	531	DEB_EE(("dev:%p\n",dev));
1da177e4 LT	532
1da177e4 LT	533	video_unregister_device(*vid);
	534	*vid = NULL;
	535
	536	return 0;
	537	}
5d7dc8c4	538	EXPORT_SYMBOL_GPL(saa7146_unregister_device);
1da177e4 LT	539
	540	static int __init saa7146_vv_init_module(void)
	541	{
	542	return 0;
	543	}
	544
	545
	546	static void __exit saa7146_vv_cleanup_module(void)
	547	{
	548	}
	549
	550	module_init(saa7146_vv_init_module);
	551	module_exit(saa7146_vv_cleanup_module);
	552
	553	MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
	554	MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
	555	MODULE_LICENSE("GPL");