drivers/media/common/saa7146_fops.c

   1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   2
   3 #include <media/saa7146_vv.h>
   4 #include <linux/module.h>
   5
   6 /****************************************************************************/
   7 /* resource management functions, shamelessly stolen from saa7134 driver */
   8
   9 int saa7146_res_get(struct saa7146_fh *fh, unsigned int bit)
  10 {
  11         struct saa7146_dev *dev = fh->dev;
  12         struct saa7146_vv *vv = dev->vv_data;
  13
  14         if (fh->resources & bit) {
  15                 DEB_D("already allocated! want: 0x%02x, cur:0x%02x\n",
  16                       bit, vv->resources);
  17                 /* have it already allocated */
  18                 return 1;
  19         }
  20
  21         /* is it free? */
  22         if (vv->resources & bit) {
  23                 DEB_D("locked! vv->resources:0x%02x, we want:0x%02x\n",
  24                       vv->resources, bit);
  25                 /* no, someone else uses it */
  26                 return 0;
  27         }
  28         /* it's free, grab it */
  29         fh->resources |= bit;
  30         vv->resources |= bit;
  31         DEB_D("res: get 0x%02x, cur:0x%02x\n", bit, vv->resources);
  32         return 1;
  33 }
  34
  35 void saa7146_res_free(struct saa7146_fh *fh, unsigned int bits)
  36 {
  37         struct saa7146_dev *dev = fh->dev;
  38         struct saa7146_vv *vv = dev->vv_data;
  39
  40         BUG_ON((fh->resources & bits) != bits);
  41
  42         fh->resources &= ~bits;
  43         vv->resources &= ~bits;
  44         DEB_D("res: put 0x%02x, cur:0x%02x\n", bits, vv->resources);
  45 }
  46
  47
  48 /********************************************************************************/
  49 /* common dma functions */
  50
  51 void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
  52                                                 struct saa7146_buf *buf)
  53 {
  54         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
  55         DEB_EE("dev:%p, buf:%p\n", dev, buf);
  56
  57         BUG_ON(in_interrupt());
  58
  59         videobuf_waiton(q, &buf->vb, 0, 0);
  60         videobuf_dma_unmap(q->dev, dma);
  61         videobuf_dma_free(dma);
  62         buf->vb.state = VIDEOBUF_NEEDS_INIT;
  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);
  84                 buf->vb.state = VIDEOBUF_QUEUED;
  85                 DEB_D("adding buffer %p to queue. (active buffer present)\n",
  86                       buf);
  87         }
  88         return 0;
  89 }
  90
  91 void saa7146_buffer_finish(struct saa7146_dev *dev,
  92                            struct saa7146_dmaqueue *q,
  93                            int state)
  94 {
  95         assert_spin_locked(&dev->slock);
  96         DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
  97         DEB_EE("q->curr:%p\n", q->curr);
  98
  99         BUG_ON(!q->curr);
 100
 101         /* finish current buffer */
 102         if (NULL == q->curr) {
 103                 DEB_D("aiii. no current buffer\n");
 104                 return;
 105         }
 106
 107         q->curr->vb.state = state;
 108         do_gettimeofday(&q->curr->vb.ts);
 109         wake_up(&q->curr->vb.done);
 110
 111         q->curr = NULL;
 112 }
 113
 114 void saa7146_buffer_next(struct saa7146_dev *dev,
 115                          struct saa7146_dmaqueue *q, int vbi)
 116 {
 117         struct saa7146_buf *buf,*next = NULL;
 118
 119         BUG_ON(!q);
 120
 121         DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi);
 122
 123         assert_spin_locked(&dev->slock);
 124         if (!list_empty(&q->queue)) {
 125                 /* activate next one from queue */
 126                 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue);
 127                 list_del(&buf->vb.queue);
 128                 if (!list_empty(&q->queue))
 129                         next = list_entry(q->queue.next,struct saa7146_buf, vb.queue);
 130                 q->curr = buf;
 131                 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n",
 132                         buf, q->queue.prev, q->queue.next);
 133                 buf->activate(dev,buf,next);
 134         } else {
 135                 DEB_INT("no next buffer. stopping.\n");
 136                 if( 0 != vbi ) {
 137                         /* turn off video-dma3 */
 138                         saa7146_write(dev,MC1, MASK_20);
 139                 } else {
 140                         /* nothing to do -- just prevent next video-dma1 transfer
 141                            by lowering the protection address */
 142
 143                         // fixme: fix this for vflip != 0
 144
 145                         saa7146_write(dev, PROT_ADDR1, 0);
 146                         saa7146_write(dev, MC2, (MASK_02|MASK_18));
 147
 148                         /* write the address of the rps-program */
 149                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
 150                         /* turn on rps */
 151                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
 152
 153 /*
 154                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
 155                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
 156                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
 157                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
 158                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
 159                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
 160 */
 161                 }
 162                 del_timer(&q->timeout);
 163         }
 164 }
 165
 166 void saa7146_buffer_timeout(unsigned long data)
 167 {
 168         struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data;
 169         struct saa7146_dev *dev = q->dev;
 170         unsigned long flags;
 171
 172         DEB_EE("dev:%p, dmaq:%p\n", dev, q);
 173
 174         spin_lock_irqsave(&dev->slock,flags);
 175         if (q->curr) {
 176                 DEB_D("timeout on %p\n", q->curr);
 177                 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
 178         }
 179
 180         /* we don't restart the transfer here like other drivers do. when
 181            a streaming capture is disabled, the timeout function will be
 182            called for the current buffer. if we activate the next buffer now,
 183            we mess up our capture logic. if a timeout occurs on another buffer,
 184            then something is seriously broken before, so no need to buffer the
 185            next capture IMHO... */
 186 /*
 187         saa7146_buffer_next(dev,q);
 188 */
 189         spin_unlock_irqrestore(&dev->slock,flags);
 190 }
 191
 192 /********************************************************************************/
 193 /* file operations */
 194
 195 static int fops_open(struct file *file)
 196 {
 197         struct video_device *vdev = video_devdata(file);
 198         struct saa7146_dev *dev = video_drvdata(file);
 199         struct saa7146_fh *fh = NULL;
 200         int result = 0;
 201
 202         DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
 203
 204         if (mutex_lock_interruptible(&saa7146_devices_lock))
 205                 return -ERESTARTSYS;
 206
 207         DEB_D("using: %p\n", dev);
 208
 209         /* check if an extension is registered */
 210         if( NULL == dev->ext ) {
 211                 DEB_S("no extension registered for this device\n");
 212                 result = -ENODEV;
 213                 goto out;
 214         }
 215
 216         /* allocate per open data */
 217         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
 218         if (NULL == fh) {
 219                 DEB_S("cannot allocate memory for per open data\n");
 220                 result = -ENOMEM;
 221                 goto out;
 222         }
 223
 224         v4l2_fh_init(&fh->fh, vdev);
 225
 226         file->private_data = &fh->fh;
 227         fh->dev = dev;
 228
 229         if (vdev->vfl_type == VFL_TYPE_VBI) {
 230                 DEB_S("initializing vbi...\n");
 231                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 232                         result = saa7146_vbi_uops.open(dev,file);
 233                 if (dev->ext_vv_data->vbi_fops.open)
 234                         dev->ext_vv_data->vbi_fops.open(file);
 235         } else {
 236                 DEB_S("initializing video...\n");
 237                 result = saa7146_video_uops.open(dev,file);
 238         }
 239
 240         if (0 != result) {
 241                 goto out;
 242         }
 243
 244         if( 0 == try_module_get(dev->ext->module)) {
 245                 result = -EINVAL;
 246                 goto out;
 247         }
 248
 249         result = 0;
 250         v4l2_fh_add(&fh->fh);
 251 out:
 252         if (fh && result != 0) {
 253                 kfree(fh);
 254                 file->private_data = NULL;
 255         }
 256         mutex_unlock(&saa7146_devices_lock);
 257         return result;
 258 }
 259
 260 static int fops_release(struct file *file)
 261 {
 262         struct video_device *vdev = video_devdata(file);
 263         struct saa7146_fh  *fh  = file->private_data;
 264         struct saa7146_dev *dev = fh->dev;
 265
 266         DEB_EE("file:%p\n", file);
 267
 268         if (mutex_lock_interruptible(&saa7146_devices_lock))
 269                 return -ERESTARTSYS;
 270
 271         if (vdev->vfl_type == VFL_TYPE_VBI) {
 272                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 273                         saa7146_vbi_uops.release(dev,file);
 274                 if (dev->ext_vv_data->vbi_fops.release)
 275                         dev->ext_vv_data->vbi_fops.release(file);
 276         } else {
 277                 saa7146_video_uops.release(dev,file);
 278         }
 279
 280         v4l2_fh_del(&fh->fh);
 281         v4l2_fh_exit(&fh->fh);
 282         module_put(dev->ext->module);
 283         file->private_data = NULL;
 284         kfree(fh);
 285
 286         mutex_unlock(&saa7146_devices_lock);
 287
 288         return 0;
 289 }
 290
 291 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
 292 {
 293         struct video_device *vdev = video_devdata(file);
 294         struct saa7146_fh *fh = file->private_data;
 295         struct videobuf_queue *q;
 296
 297         switch (vdev->vfl_type) {
 298         case VFL_TYPE_GRABBER: {
 299                 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
 300                        file, vma);
 301                 q = &fh->video_q;
 302                 break;
 303                 }
 304         case VFL_TYPE_VBI: {
 305                 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
 306                        file, vma);
 307                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
 308                         return -ENODEV;
 309                 q = &fh->vbi_q;
 310                 break;
 311                 }
 312         default:
 313                 BUG();
 314                 return 0;
 315         }
 316
 317         return videobuf_mmap_mapper(q,vma);
 318 }
 319
 320 static unsigned int 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         unsigned int 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 | POLLOUT | POLLWRNORM;
 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 | POLLERR;
 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 | POLLIN | POLLRDNORM;
 353         }
 354
 355         DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
 356         return res;
 357 }
 358
 359 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 360 {
 361         struct video_device *vdev = video_devdata(file);
 362         struct saa7146_fh *fh = file->private_data;
 363
 364         switch (vdev->vfl_type) {
 365         case VFL_TYPE_GRABBER:
 366 /*
 367                 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
 368                        file, data, (unsigned long)count);
 369 */
 370                 return saa7146_video_uops.read(file,data,count,ppos);
 371         case VFL_TYPE_VBI:
 372 /*
 373                 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
 374                        file, data, (unsigned long)count);
 375 */
 376                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 377                         return saa7146_vbi_uops.read(file,data,count,ppos);
 378                 return -EINVAL;
 379         default:
 380                 BUG();
 381                 return 0;
 382         }
 383 }
 384
 385 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
 386 {
 387         struct video_device *vdev = video_devdata(file);
 388         struct saa7146_fh *fh = file->private_data;
 389
 390         switch (vdev->vfl_type) {
 391         case VFL_TYPE_GRABBER:
 392                 return -EINVAL;
 393         case VFL_TYPE_VBI:
 394                 if (fh->dev->ext_vv_data->vbi_fops.write)
 395                         return fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
 396                 else
 397                         return -EINVAL;
 398         default:
 399                 BUG();
 400                 return -EINVAL;
 401         }
 402 }
 403
 404 static const struct v4l2_file_operations video_fops =
 405 {
 406         .owner          = THIS_MODULE,
 407         .open           = fops_open,
 408         .release        = fops_release,
 409         .read           = fops_read,
 410         .write          = fops_write,
 411         .poll           = fops_poll,
 412         .mmap           = fops_mmap,
 413         .unlocked_ioctl = video_ioctl2,
 414 };
 415
 416 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 417 {
 418         u32 isr = status;
 419
 420         DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
 421
 422         if (0 != (isr & (MASK_27))) {
 423                 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
 424                 saa7146_video_uops.irq_done(dev,isr);
 425         }
 426
 427         if (0 != (isr & (MASK_28))) {
 428                 u32 mc2 = saa7146_read(dev, MC2);
 429                 if( 0 != (mc2 & MASK_15)) {
 430                         DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
 431                         wake_up(&dev->vv_data->vbi_wq);
 432                         saa7146_write(dev,MC2, MASK_31);
 433                         return;
 434                 }
 435                 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
 436                 saa7146_vbi_uops.irq_done(dev,isr);
 437         }
 438 }
 439
 440 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
 441         .s_ctrl = saa7146_s_ctrl,
 442 };
 443
 444 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 445 {
 446         struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
 447         struct v4l2_pix_format *fmt;
 448         struct v4l2_vbi_format *vbi;
 449         struct saa7146_vv *vv;
 450         int err;
 451
 452         err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
 453         if (err)
 454                 return err;
 455
 456         v4l2_ctrl_handler_init(hdl, 6);
 457         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 458                 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 459         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 460                 V4L2_CID_CONTRAST, 0, 127, 1, 64);
 461         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 462                 V4L2_CID_SATURATION, 0, 127, 1, 64);
 463         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 464                 V4L2_CID_VFLIP, 0, 1, 1, 0);
 465         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 466                 V4L2_CID_HFLIP, 0, 1, 1, 0);
 467         if (hdl->error) {
 468                 err = hdl->error;
 469                 v4l2_ctrl_handler_free(hdl);
 470                 return err;
 471         }
 472         dev->v4l2_dev.ctrl_handler = hdl;
 473
 474         vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
 475         if (vv == NULL) {
 476                 ERR("out of memory. aborting.\n");
 477                 v4l2_ctrl_handler_free(hdl);
 478                 return -ENOMEM;
 479         }
 480         ext_vv->vid_ops = saa7146_video_ioctl_ops;
 481         ext_vv->vbi_ops = saa7146_vbi_ioctl_ops;
 482         ext_vv->core_ops = &saa7146_video_ioctl_ops;
 483
 484         DEB_EE("dev:%p\n", dev);
 485
 486         /* set default values for video parts of the saa7146 */
 487         saa7146_write(dev, BCS_CTRL, 0x80400040);
 488
 489         /* enable video-port pins */
 490         saa7146_write(dev, MC1, (MASK_10 | MASK_26));
 491
 492         /* save per-device extension data (one extension can
 493            handle different devices that might need different
 494            configuration data) */
 495         dev->ext_vv_data = ext_vv;
 496
 497         vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle);
 498         if( NULL == vv->d_clipping.cpu_addr ) {
 499                 ERR("out of memory. aborting.\n");
 500                 kfree(vv);
 501                 v4l2_ctrl_handler_free(hdl);
 502                 return -1;
 503         }
 504         memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM);
 505
 506         saa7146_video_uops.init(dev,vv);
 507         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 508                 saa7146_vbi_uops.init(dev,vv);
 509
 510         fmt = &vv->ov_fb.fmt;
 511         fmt->width = vv->standard->h_max_out;
 512         fmt->height = vv->standard->v_max_out;
 513         fmt->pixelformat = V4L2_PIX_FMT_RGB565;
 514         fmt->bytesperline = 2 * fmt->width;
 515         fmt->sizeimage = fmt->bytesperline * fmt->height;
 516         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 517
 518         fmt = &vv->video_fmt;
 519         fmt->width = 384;
 520         fmt->height = 288;
 521         fmt->pixelformat = V4L2_PIX_FMT_BGR24;
 522         fmt->field = V4L2_FIELD_ANY;
 523         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 524         fmt->bytesperline = 3 * fmt->width;
 525         fmt->sizeimage = fmt->bytesperline * fmt->height;
 526
 527         vbi = &vv->vbi_fmt;
 528         vbi->sampling_rate      = 27000000;
 529         vbi->offset             = 248; /* todo */
 530         vbi->samples_per_line   = 720 * 2;
 531         vbi->sample_format      = V4L2_PIX_FMT_GREY;
 532
 533         /* fixme: this only works for PAL */
 534         vbi->start[0] = 5;
 535         vbi->count[0] = 16;
 536         vbi->start[1] = 312;
 537         vbi->count[1] = 16;
 538
 539         init_timer(&vv->vbi_read_timeout);
 540
 541         vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 542         vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
 543         dev->vv_data = vv;
 544         dev->vv_callback = &vv_callback;
 545
 546         return 0;
 547 }
 548 EXPORT_SYMBOL_GPL(saa7146_vv_init);
 549
 550 int saa7146_vv_release(struct saa7146_dev* dev)
 551 {
 552         struct saa7146_vv *vv = dev->vv_data;
 553
 554         DEB_EE("dev:%p\n", dev);
 555
 556         v4l2_device_unregister(&dev->v4l2_dev);
 557         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
 558         v4l2_ctrl_handler_free(&dev->ctrl_handler);
 559         kfree(vv);
 560         dev->vv_data = NULL;
 561         dev->vv_callback = NULL;
 562
 563         return 0;
 564 }
 565 EXPORT_SYMBOL_GPL(saa7146_vv_release);
 566
 567 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev,
 568                             char *name, int type)
 569 {
 570         struct video_device *vfd;
 571         int err;
 572         int i;
 573
 574         DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
 575
 576         // released by vfd->release
 577         vfd = video_device_alloc();
 578         if (vfd == NULL)
 579                 return -ENOMEM;
 580
 581         vfd->fops = &video_fops;
 582         if (type == VFL_TYPE_GRABBER)
 583                 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
 584         else
 585                 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
 586         vfd->release = video_device_release;
 587         /* Locking in file operations other than ioctl should be done by
 588            the driver, not the V4L2 core.
 589            This driver needs auditing so that this flag can be removed. */
 590         set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
 591         vfd->lock = &dev->v4l2_lock;
 592         vfd->v4l2_dev = &dev->v4l2_dev;
 593         vfd->tvnorms = 0;
 594         set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
 595         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 596                 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
 597         strlcpy(vfd->name, name, sizeof(vfd->name));
 598         video_set_drvdata(vfd, dev);
 599
 600         err = video_register_device(vfd, type, -1);
 601         if (err < 0) {
 602                 ERR("cannot register v4l2 device. skipping.\n");
 603                 video_device_release(vfd);
 604                 return err;
 605         }
 606
 607         pr_info("%s: registered device %s [v4l2]\n",
 608                 dev->name, video_device_node_name(vfd));
 609
 610         *vid = vfd;
 611         return 0;
 612 }
 613 EXPORT_SYMBOL_GPL(saa7146_register_device);
 614
 615 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev)
 616 {
 617         DEB_EE("dev:%p\n", dev);
 618
 619         video_unregister_device(*vid);
 620         *vid = NULL;
 621
 622         return 0;
 623 }
 624 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
 625
 626 static int __init saa7146_vv_init_module(void)
 627 {
 628         return 0;
 629 }
 630
 631
 632 static void __exit saa7146_vv_cleanup_module(void)
 633 {
 634 }
 635
 636 module_init(saa7146_vv_init_module);
 637 module_exit(saa7146_vv_cleanup_module);
 638
 639 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 640 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 641 MODULE_LICENSE("GPL");