cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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saa7146_fops.c (17327B)


      1// SPDX-License-Identifier: GPL-2.0-only
      2#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
      3
      4#include <media/drv-intf/saa7146_vv.h>
      5#include <linux/module.h>
      6
      7/****************************************************************************/
      8/* resource management functions, shamelessly stolen from saa7134 driver */
      9
     10int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
     11{
     12	struct saa7146_dev *dev = fh->dev;
     13	struct saa7146_vv *vv = dev->vv_data;
     14
     15	if (fh->resources & bit) {
     16		DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
     17		      bit, vv->resources);
     18		/* have it already allocated */
     19		return 1;
     20	}
     21
     22	/* is it free? */
     23	if (vv->resources & bit) {
     24		DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
     25		      vv->resources, bit);
     26		/* no, someone else uses it */
     27		return 0;
     28	}
     29	/* it's free, grab it */
     30	fh->resources |= bit;
     31	vv->resources |= bit;
     32	DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
     33	return 1;
     34}
     35
     36void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
     37{
     38	struct saa7146_dev *dev = fh->dev;
     39	struct saa7146_vv *vv = dev->vv_data;
     40
     41	BUG_ON((fh->resources & bits) != bits);
     42
     43	fh->resources &= ~bits;
     44	vv->resources &= ~bits;
     45	DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
     46}
     47
     48
     49/********************************************************************************/
     50/* common dma functions */
     51
     52void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
     53						struct saa7146_buf *buf)
     54{
     55	struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
     56	DEB_EE("dev:%p, buf:%p\n", dev, buf);
     57
     58	videobuf_waiton(q, &buf->vb, 0, 0);
     59	videobuf_dma_unmap(q->dev, dma);
     60	videobuf_dma_free(dma);
     61	buf->vb.state = VIDEOBUF_NEEDS_INIT;
     62}
     63
     64
     65/********************************************************************************/
     66/* common buffer functions */
     67
     68int saa7146_buffer_queue(struct saa7146_dev *dev,
     69			 struct saa7146_dmaqueue *q,
     70			 struct saa7146_buf *buf)
     71{
     72	assert_spin_locked(&dev->slock);
     73	DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
     74
     75	BUG_ON(!q);
     76
     77	if (NULL == q->curr) {
     78		q->curr = buf;
     79		DEB_D("immediately activating buffer %p\n", buf);
     80		buf->activate(dev,buf,NULL);
     81	} else {
     82		list_add_tail(&buf->vb.queue,&q->queue);
     83		buf->vb.state = VIDEOBUF_QUEUED;
     84		DEB_D("adding buffer %p to queue. (active buffer present)\n",
     85		      buf);
     86	}
     87	return 0;
     88}
     89
     90void 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	/* finish current buffer */
     99	if (NULL == q->curr) {
    100		DEB_D("aiii. no current buffer\n");
    101		return;
    102	}
    103
    104	q->curr->vb.state = state;
    105	q->curr->vb.ts = ktime_get_ns();
    106	wake_up(&q->curr->vb.done);
    107
    108	q->curr = NULL;
    109}
    110
    111void saa7146_buffer_next(struct saa7146_dev *dev,
    112			 struct saa7146_dmaqueue *q, int vbi)
    113{
    114	struct saa7146_buf *buf,*next = NULL;
    115
    116	BUG_ON(!q);
    117
    118	DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
    119
    120	assert_spin_locked(&dev->slock);
    121	if (!list_empty(&q->queue)) {
    122		/* activate next one from queue */
    123		buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
    124		list_del(&buf->vb.queue);
    125		if (!list_empty(&q->queue))
    126			next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
    127		q->curr = buf;
    128		DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
    129			buf, q->queue.prev, q->queue.next);
    130		buf->activate(dev,buf,next);
    131	} else {
    132		DEB_INT("no next buffer. stopping.\n");
    133		if( 0 != vbi ) {
    134			/* turn off video-dma3 */
    135			saa7146_write(dev,MC1, MASK_20);
    136		} else {
    137			/* nothing to do -- just prevent next video-dma1 transfer
    138			   by lowering the protection address */
    139
    140			// fixme: fix this for vflip != 0
    141
    142			saa7146_write(dev, PROT_ADDR1, 0);
    143			saa7146_write(dev, MC2, (MASK_02|MASK_18));
    144
    145			/* write the address of the rps-program */
    146			saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
    147			/* turn on rps */
    148			saa7146_write(dev, MC1, (MASK_12 | MASK_28));
    149
    150/*
    151			printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
    152			printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
    153			printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
    154			printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
    155			printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
    156			printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
    157*/
    158		}
    159		del_timer(&q->timeout);
    160	}
    161}
    162
    163void saa7146_buffer_timeout(struct timer_list *t)
    164{
    165	struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
    166	struct saa7146_dev *dev = q->dev;
    167	unsigned long flags;
    168
    169	DEB_EE("dev:%p, dmaq:%p\n", dev, q);
    170
    171	spin_lock_irqsave(&dev->slock,flags);
    172	if (q->curr) {
    173		DEB_D("timeout on %p\n", q->curr);
    174		saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
    175	}
    176
    177	/* we don't restart the transfer here like other drivers do. when
    178	   a streaming capture is disabled, the timeout function will be
    179	   called for the current buffer. if we activate the next buffer now,
    180	   we mess up our capture logic. if a timeout occurs on another buffer,
    181	   then something is seriously broken before, so no need to buffer the
    182	   next capture IMHO... */
    183/*
    184	saa7146_buffer_next(dev,q);
    185*/
    186	spin_unlock_irqrestore(&dev->slock,flags);
    187}
    188
    189/********************************************************************************/
    190/* file operations */
    191
    192static int fops_open(struct file *file)
    193{
    194	struct video_device *vdev = video_devdata(file);
    195	struct saa7146_dev *dev = video_drvdata(file);
    196	struct saa7146_fh *fh = NULL;
    197	int result = 0;
    198
    199	DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
    200
    201	if (mutex_lock_interruptible(vdev->lock))
    202		return -ERESTARTSYS;
    203
    204	DEB_D("using: %p\n", dev);
    205
    206	/* check if an extension is registered */
    207	if( NULL == dev->ext ) {
    208		DEB_S("no extension registered for this device\n");
    209		result = -ENODEV;
    210		goto out;
    211	}
    212
    213	/* allocate per open data */
    214	fh = kzalloc(sizeof(*fh),GFP_KERNEL);
    215	if (NULL == fh) {
    216		DEB_S("cannot allocate memory for per open data\n");
    217		result = -ENOMEM;
    218		goto out;
    219	}
    220
    221	v4l2_fh_init(&fh->fh, vdev);
    222
    223	file->private_data = &fh->fh;
    224	fh->dev = dev;
    225
    226	if (vdev->vfl_type == VFL_TYPE_VBI) {
    227		DEB_S("initializing vbi...\n");
    228		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
    229			result = saa7146_vbi_uops.open(dev,file);
    230		if (dev->ext_vv_data->vbi_fops.open)
    231			dev->ext_vv_data->vbi_fops.open(file);
    232	} else {
    233		DEB_S("initializing video...\n");
    234		result = saa7146_video_uops.open(dev,file);
    235	}
    236
    237	if (0 != result) {
    238		goto out;
    239	}
    240
    241	if( 0 == try_module_get(dev->ext->module)) {
    242		result = -EINVAL;
    243		goto out;
    244	}
    245
    246	result = 0;
    247	v4l2_fh_add(&fh->fh);
    248out:
    249	if (fh && result != 0) {
    250		kfree(fh);
    251		file->private_data = NULL;
    252	}
    253	mutex_unlock(vdev->lock);
    254	return result;
    255}
    256
    257static int fops_release(struct file *file)
    258{
    259	struct video_device *vdev = video_devdata(file);
    260	struct saa7146_fh  *fh  = file->private_data;
    261	struct saa7146_dev *dev = fh->dev;
    262
    263	DEB_EE("file:%p\n", file);
    264
    265	mutex_lock(vdev->lock);
    266
    267	if (vdev->vfl_type == VFL_TYPE_VBI) {
    268		if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
    269			saa7146_vbi_uops.release(dev,file);
    270		if (dev->ext_vv_data->vbi_fops.release)
    271			dev->ext_vv_data->vbi_fops.release(file);
    272	} else {
    273		saa7146_video_uops.release(dev,file);
    274	}
    275
    276	v4l2_fh_del(&fh->fh);
    277	v4l2_fh_exit(&fh->fh);
    278	module_put(dev->ext->module);
    279	file->private_data = NULL;
    280	kfree(fh);
    281
    282	mutex_unlock(vdev->lock);
    283
    284	return 0;
    285}
    286
    287static int fops_mmap(struct file *file, struct vm_area_struct * vma)
    288{
    289	struct video_device *vdev = video_devdata(file);
    290	struct saa7146_fh *fh = file->private_data;
    291	struct videobuf_queue *q;
    292	int res;
    293
    294	switch (vdev->vfl_type) {
    295	case VFL_TYPE_VIDEO: {
    296		DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
    297		       file, vma);
    298		q = &fh->video_q;
    299		break;
    300		}
    301	case VFL_TYPE_VBI: {
    302		DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
    303		       file, vma);
    304		if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
    305			return -ENODEV;
    306		q = &fh->vbi_q;
    307		break;
    308		}
    309	default:
    310		BUG();
    311	}
    312
    313	if (mutex_lock_interruptible(vdev->lock))
    314		return -ERESTARTSYS;
    315	res = videobuf_mmap_mapper(q, vma);
    316	mutex_unlock(vdev->lock);
    317	return res;
    318}
    319
    320static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait)
    321{
    322	struct video_device *vdev = video_devdata(file);
    323	struct saa7146_fh *fh = file->private_data;
    324	struct videobuf_buffer *buf = NULL;
    325	struct videobuf_queue *q;
    326	__poll_t res = v4l2_ctrl_poll(file, wait);
    327
    328	DEB_EE("file:%p, poll:%p\n", file, wait);
    329
    330	if (vdev->vfl_type == VFL_TYPE_VBI) {
    331		if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
    332			return res | EPOLLOUT | EPOLLWRNORM;
    333		if( 0 == fh->vbi_q.streaming )
    334			return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
    335		q = &fh->vbi_q;
    336	} else {
    337		DEB_D("using video queue\n");
    338		q = &fh->video_q;
    339	}
    340
    341	if (!list_empty(&q->stream))
    342		buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
    343
    344	if (!buf) {
    345		DEB_D("buf == NULL!\n");
    346		return res | EPOLLERR;
    347	}
    348
    349	poll_wait(file, &buf->done, wait);
    350	if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
    351		DEB_D("poll succeeded!\n");
    352		return res | EPOLLIN | EPOLLRDNORM;
    353	}
    354
    355	DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
    356	return res;
    357}
    358
    359static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait)
    360{
    361	struct video_device *vdev = video_devdata(file);
    362	__poll_t res;
    363
    364	mutex_lock(vdev->lock);
    365	res = __fops_poll(file, wait);
    366	mutex_unlock(vdev->lock);
    367	return res;
    368}
    369
    370static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
    371{
    372	struct video_device *vdev = video_devdata(file);
    373	struct saa7146_fh *fh = file->private_data;
    374	int ret;
    375
    376	switch (vdev->vfl_type) {
    377	case VFL_TYPE_VIDEO:
    378/*
    379		DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
    380		       file, data, (unsigned long)count);
    381*/
    382		return saa7146_video_uops.read(file,data,count,ppos);
    383	case VFL_TYPE_VBI:
    384/*
    385		DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
    386		       file, data, (unsigned long)count);
    387*/
    388		if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
    389			if (mutex_lock_interruptible(vdev->lock))
    390				return -ERESTARTSYS;
    391			ret = saa7146_vbi_uops.read(file, data, count, ppos);
    392			mutex_unlock(vdev->lock);
    393			return ret;
    394		}
    395		return -EINVAL;
    396	default:
    397		BUG();
    398	}
    399}
    400
    401static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
    402{
    403	struct video_device *vdev = video_devdata(file);
    404	struct saa7146_fh *fh = file->private_data;
    405	int ret;
    406
    407	switch (vdev->vfl_type) {
    408	case VFL_TYPE_VIDEO:
    409		return -EINVAL;
    410	case VFL_TYPE_VBI:
    411		if (fh->dev->ext_vv_data->vbi_fops.write) {
    412			if (mutex_lock_interruptible(vdev->lock))
    413				return -ERESTARTSYS;
    414			ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
    415			mutex_unlock(vdev->lock);
    416			return ret;
    417		}
    418		return -EINVAL;
    419	default:
    420		BUG();
    421	}
    422}
    423
    424static const struct v4l2_file_operations video_fops =
    425{
    426	.owner		= THIS_MODULE,
    427	.open		= fops_open,
    428	.release	= fops_release,
    429	.read		= fops_read,
    430	.write		= fops_write,
    431	.poll		= fops_poll,
    432	.mmap		= fops_mmap,
    433	.unlocked_ioctl	= video_ioctl2,
    434};
    435
    436static void vv_callback(struct saa7146_dev *dev, unsigned long status)
    437{
    438	u32 isr = status;
    439
    440	DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
    441
    442	if (0 != (isr & (MASK_27))) {
    443		DEB_INT("irq: RPS0 (0x%08x)\n", isr);
    444		saa7146_video_uops.irq_done(dev,isr);
    445	}
    446
    447	if (0 != (isr & (MASK_28))) {
    448		u32 mc2 = saa7146_read(dev, MC2);
    449		if( 0 != (mc2 & MASK_15)) {
    450			DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
    451			wake_up(&dev->vv_data->vbi_wq);
    452			saa7146_write(dev,MC2, MASK_31);
    453			return;
    454		}
    455		DEB_INT("irq: RPS1 (0x%08x)\n", isr);
    456		saa7146_vbi_uops.irq_done(dev,isr);
    457	}
    458}
    459
    460static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
    461	.s_ctrl = saa7146_s_ctrl,
    462};
    463
    464int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
    465{
    466	struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
    467	struct v4l2_pix_format *fmt;
    468	struct v4l2_vbi_format *vbi;
    469	struct saa7146_vv *vv;
    470	int err;
    471
    472	err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
    473	if (err)
    474		return err;
    475
    476	v4l2_ctrl_handler_init(hdl, 6);
    477	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
    478		V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
    479	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
    480		V4L2_CID_CONTRAST, 0, 127, 1, 64);
    481	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
    482		V4L2_CID_SATURATION, 0, 127, 1, 64);
    483	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
    484		V4L2_CID_VFLIP, 0, 1, 1, 0);
    485	v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
    486		V4L2_CID_HFLIP, 0, 1, 1, 0);
    487	if (hdl->error) {
    488		err = hdl->error;
    489		v4l2_ctrl_handler_free(hdl);
    490		v4l2_device_unregister(&dev->v4l2_dev);
    491		return err;
    492	}
    493	dev->v4l2_dev.ctrl_handler = hdl;
    494
    495	vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
    496	if (vv == NULL) {
    497		ERR("out of memory. aborting.\n");
    498		v4l2_ctrl_handler_free(hdl);
    499		v4l2_device_unregister(&dev->v4l2_dev);
    500		return -ENOMEM;
    501	}
    502	ext_vv->vid_ops = saa7146_video_ioctl_ops;
    503	ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
    504	ext_vv->core_ops = &saa7146_video_ioctl_ops;
    505
    506	DEB_EE("dev:%p\n", dev);
    507
    508	/* set default values for video parts of the saa7146 */
    509	saa7146_write(dev, BCS_CTRL, 0x80400040);
    510
    511	/* enable video-port pins */
    512	saa7146_write(dev, MC1, (MASK_10 | MASK_26));
    513
    514	/* save per-device extension data (one extension can
    515	   handle different devices that might need different
    516	   configuration data) */
    517	dev->ext_vv_data = ext_vv;
    518
    519	vv->d_clipping.cpu_addr =
    520		dma_alloc_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
    521				   &vv->d_clipping.dma_handle, GFP_KERNEL);
    522	if( NULL == vv->d_clipping.cpu_addr ) {
    523		ERR("out of memory. aborting.\n");
    524		kfree(vv);
    525		v4l2_ctrl_handler_free(hdl);
    526		v4l2_device_unregister(&dev->v4l2_dev);
    527		return -ENOMEM;
    528	}
    529
    530	saa7146_video_uops.init(dev,vv);
    531	if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
    532		saa7146_vbi_uops.init(dev,vv);
    533
    534	vv->ov_fb.fmt.width = vv->standard->h_max_out;
    535	vv->ov_fb.fmt.height = vv->standard->v_max_out;
    536	vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
    537	vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width;
    538	vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height;
    539	vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB;
    540
    541	fmt = &vv->video_fmt;
    542	fmt->width = 384;
    543	fmt->height = 288;
    544	fmt->pixelformat = V4L2_PIX_FMT_BGR24;
    545	fmt->field = V4L2_FIELD_ANY;
    546	fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
    547	fmt->bytesperline = 3 * fmt->width;
    548	fmt->sizeimage = fmt->bytesperline * fmt->height;
    549
    550	vbi = &vv->vbi_fmt;
    551	vbi->sampling_rate	= 27000000;
    552	vbi->offset		= 248; /* todo */
    553	vbi->samples_per_line	= 720 * 2;
    554	vbi->sample_format	= V4L2_PIX_FMT_GREY;
    555
    556	/* fixme: this only works for PAL */
    557	vbi->start[0] = 5;
    558	vbi->count[0] = 16;
    559	vbi->start[1] = 312;
    560	vbi->count[1] = 16;
    561
    562	timer_setup(&vv->vbi_read_timeout, NULL, 0);
    563
    564	vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
    565	vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
    566	dev->vv_data = vv;
    567	dev->vv_callback = &vv_callback;
    568
    569	return 0;
    570}
    571EXPORT_SYMBOL_GPL(saa7146_vv_init);
    572
    573int saa7146_vv_release(struct saa7146_dev* dev)
    574{
    575	struct saa7146_vv *vv = dev->vv_data;
    576
    577	DEB_EE("dev:%p\n", dev);
    578
    579	v4l2_device_unregister(&dev->v4l2_dev);
    580	dma_free_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM,
    581			  vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
    582	v4l2_ctrl_handler_free(&dev->ctrl_handler);
    583	kfree(vv);
    584	dev->vv_data = NULL;
    585	dev->vv_callback = NULL;
    586
    587	return 0;
    588}
    589EXPORT_SYMBOL_GPL(saa7146_vv_release);
    590
    591int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
    592			    char *name, int type)
    593{
    594	int err;
    595	int i;
    596
    597	DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
    598
    599	vfd->fops = &video_fops;
    600	if (type == VFL_TYPE_VIDEO)
    601		vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
    602	else
    603		vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
    604	vfd->release = video_device_release_empty;
    605	vfd->lock = &dev->v4l2_lock;
    606	vfd->v4l2_dev = &dev->v4l2_dev;
    607	vfd->tvnorms = 0;
    608	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
    609		vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
    610	strscpy(vfd->name, name, sizeof(vfd->name));
    611	vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
    612			   V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
    613	vfd->device_caps |= dev->ext_vv_data->capabilities;
    614	if (type == VFL_TYPE_VIDEO)
    615		vfd->device_caps &=
    616			~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
    617	else
    618		vfd->device_caps &=
    619			~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
    620	video_set_drvdata(vfd, dev);
    621
    622	err = video_register_device(vfd, type, -1);
    623	if (err < 0) {
    624		ERR("cannot register v4l2 device. skipping.\n");
    625		return err;
    626	}
    627
    628	pr_info("%s: registered device %s [v4l2]\n",
    629		dev->name, video_device_node_name(vfd));
    630	return 0;
    631}
    632EXPORT_SYMBOL_GPL(saa7146_register_device);
    633
    634int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
    635{
    636	DEB_EE("dev:%p\n", dev);
    637
    638	video_unregister_device(vfd);
    639	return 0;
    640}
    641EXPORT_SYMBOL_GPL(saa7146_unregister_device);
    642
    643static int __init saa7146_vv_init_module(void)
    644{
    645	return 0;
    646}
    647
    648
    649static void __exit saa7146_vv_cleanup_module(void)
    650{
    651}
    652
    653module_init(saa7146_vv_init_module);
    654module_exit(saa7146_vv_cleanup_module);
    655
    656MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
    657MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
    658MODULE_LICENSE("GPL");