drivers/media/common/saa7146/saa7146_fops.c

   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
  10 int 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
  36 void 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
  52 void 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         BUG_ON(in_interrupt());
  59
  60         videobuf_waiton(q, &buf->vb, 0, 0);
  61         videobuf_dma_unmap(q->dev, dma);
  62         videobuf_dma_free(dma);
  63         buf->vb.state = VIDEOBUF_NEEDS_INIT;
  64 }
  65
  66
  67 /********************************************************************************/
  68 /* common buffer functions */
  69
  70 int saa7146_buffer_queue(struct saa7146_dev *dev,
  71                          struct saa7146_dmaqueue *q,
  72                          struct saa7146_buf *buf)
  73 {
  74         assert_spin_locked(&dev->slock);
  75         DEB_EE("dev:%p, dmaq:%p, buf:%p\n", dev, q, buf);
  76
  77         BUG_ON(!q);
  78
  79         if (NULL == q->curr) {
  80                 q->curr = buf;
  81                 DEB_D("immediately activating buffer %p\n", buf);
  82                 buf->activate(dev,buf,NULL);
  83         } else {
  84                 list_add_tail(&buf->vb.queue,&q->queue);
  85                 buf->vb.state = VIDEOBUF_QUEUED;
  86                 DEB_D("adding buffer %p to queue. (active buffer present)\n",
  87                       buf);
  88         }
  89         return 0;
  90 }
  91
  92 void saa7146_buffer_finish(struct saa7146_dev *dev,
  93                            struct saa7146_dmaqueue *q,
  94                            int state)
  95 {
  96         assert_spin_locked(&dev->slock);
  97         DEB_EE("dev:%p, dmaq:%p, state:%d\n", dev, q, state);
  98         DEB_EE("q->curr:%p\n", q->curr);
  99
 100         /* finish current buffer */
 101         if (NULL == q->curr) {
 102                 DEB_D("aiii. no current buffer\n");
 103                 return;
 104         }
 105
 106         q->curr->vb.state = state;
 107         q->curr->vb.ts = ktime_get_ns();
 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",
 131                         buf, q->queue.prev, q->queue.next);
 132                 buf->activate(dev,buf,next);
 133         } else {
 134                 DEB_INT("no next buffer. stopping.\n");
 135                 if( 0 != vbi ) {
 136                         /* turn off video-dma3 */
 137                         saa7146_write(dev,MC1, MASK_20);
 138                 } else {
 139                         /* nothing to do -- just prevent next video-dma1 transfer
 140                            by lowering the protection address */
 141
 142                         // fixme: fix this for vflip != 0
 143
 144                         saa7146_write(dev, PROT_ADDR1, 0);
 145                         saa7146_write(dev, MC2, (MASK_02|MASK_18));
 146
 147                         /* write the address of the rps-program */
 148                         saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle);
 149                         /* turn on rps */
 150                         saa7146_write(dev, MC1, (MASK_12 | MASK_28));
 151
 152 /*
 153                         printk("vdma%d.base_even:     0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1));
 154                         printk("vdma%d.base_odd:      0x%08x\n", 1,saa7146_read(dev,BASE_ODD1));
 155                         printk("vdma%d.prot_addr:     0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1));
 156                         printk("vdma%d.base_page:     0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1));
 157                         printk("vdma%d.pitch:         0x%08x\n", 1,saa7146_read(dev,PITCH1));
 158                         printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1));
 159 */
 160                 }
 161                 del_timer(&q->timeout);
 162         }
 163 }
 164
 165 void saa7146_buffer_timeout(struct timer_list *t)
 166 {
 167         struct saa7146_dmaqueue *q = from_timer(q, t, timeout);
 168         struct saa7146_dev *dev = q->dev;
 169         unsigned long flags;
 170
 171         DEB_EE("dev:%p, dmaq:%p\n", dev, q);
 172
 173         spin_lock_irqsave(&dev->slock,flags);
 174         if (q->curr) {
 175                 DEB_D("timeout on %p\n", q->curr);
 176                 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR);
 177         }
 178
 179         /* we don't restart the transfer here like other drivers do. when
 180            a streaming capture is disabled, the timeout function will be
 181            called for the current buffer. if we activate the next buffer now,
 182            we mess up our capture logic. if a timeout occurs on another buffer,
 183            then something is seriously broken before, so no need to buffer the
 184            next capture IMHO... */
 185 /*
 186         saa7146_buffer_next(dev,q);
 187 */
 188         spin_unlock_irqrestore(&dev->slock,flags);
 189 }
 190
 191 /********************************************************************************/
 192 /* file operations */
 193
 194 static int fops_open(struct file *file)
 195 {
 196         struct video_device *vdev = video_devdata(file);
 197         struct saa7146_dev *dev = video_drvdata(file);
 198         struct saa7146_fh *fh = NULL;
 199         int result = 0;
 200
 201         DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev));
 202
 203         if (mutex_lock_interruptible(vdev->lock))
 204                 return -ERESTARTSYS;
 205
 206         DEB_D("using: %p\n", dev);
 207
 208         /* check if an extension is registered */
 209         if( NULL == dev->ext ) {
 210                 DEB_S("no extension registered for this device\n");
 211                 result = -ENODEV;
 212                 goto out;
 213         }
 214
 215         /* allocate per open data */
 216         fh = kzalloc(sizeof(*fh),GFP_KERNEL);
 217         if (NULL == fh) {
 218                 DEB_S("cannot allocate memory for per open data\n");
 219                 result = -ENOMEM;
 220                 goto out;
 221         }
 222
 223         v4l2_fh_init(&fh->fh, vdev);
 224
 225         file->private_data = &fh->fh;
 226         fh->dev = dev;
 227
 228         if (vdev->vfl_type == VFL_TYPE_VBI) {
 229                 DEB_S("initializing vbi...\n");
 230                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 231                         result = saa7146_vbi_uops.open(dev,file);
 232                 if (dev->ext_vv_data->vbi_fops.open)
 233                         dev->ext_vv_data->vbi_fops.open(file);
 234         } else {
 235                 DEB_S("initializing video...\n");
 236                 result = saa7146_video_uops.open(dev,file);
 237         }
 238
 239         if (0 != result) {
 240                 goto out;
 241         }
 242
 243         if( 0 == try_module_get(dev->ext->module)) {
 244                 result = -EINVAL;
 245                 goto out;
 246         }
 247
 248         result = 0;
 249         v4l2_fh_add(&fh->fh);
 250 out:
 251         if (fh && result != 0) {
 252                 kfree(fh);
 253                 file->private_data = NULL;
 254         }
 255         mutex_unlock(vdev->lock);
 256         return result;
 257 }
 258
 259 static int fops_release(struct file *file)
 260 {
 261         struct video_device *vdev = video_devdata(file);
 262         struct saa7146_fh  *fh  = file->private_data;
 263         struct saa7146_dev *dev = fh->dev;
 264
 265         DEB_EE("file:%p\n", file);
 266
 267         mutex_lock(vdev->lock);
 268
 269         if (vdev->vfl_type == VFL_TYPE_VBI) {
 270                 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 271                         saa7146_vbi_uops.release(dev,file);
 272                 if (dev->ext_vv_data->vbi_fops.release)
 273                         dev->ext_vv_data->vbi_fops.release(file);
 274         } else {
 275                 saa7146_video_uops.release(dev,file);
 276         }
 277
 278         v4l2_fh_del(&fh->fh);
 279         v4l2_fh_exit(&fh->fh);
 280         module_put(dev->ext->module);
 281         file->private_data = NULL;
 282         kfree(fh);
 283
 284         mutex_unlock(vdev->lock);
 285
 286         return 0;
 287 }
 288
 289 static int fops_mmap(struct file *file, struct vm_area_struct * vma)
 290 {
 291         struct video_device *vdev = video_devdata(file);
 292         struct saa7146_fh *fh = file->private_data;
 293         struct videobuf_queue *q;
 294         int res;
 295
 296         switch (vdev->vfl_type) {
 297         case VFL_TYPE_VIDEO: {
 298                 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n",
 299                        file, vma);
 300                 q = &fh->video_q;
 301                 break;
 302                 }
 303         case VFL_TYPE_VBI: {
 304                 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n",
 305                        file, vma);
 306                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
 307                         return -ENODEV;
 308                 q = &fh->vbi_q;
 309                 break;
 310                 }
 311         default:
 312                 BUG();
 313         }
 314
 315         if (mutex_lock_interruptible(vdev->lock))
 316                 return -ERESTARTSYS;
 317         res = videobuf_mmap_mapper(q, vma);
 318         mutex_unlock(vdev->lock);
 319         return res;
 320 }
 321
 322 static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait)
 323 {
 324         struct video_device *vdev = video_devdata(file);
 325         struct saa7146_fh *fh = file->private_data;
 326         struct videobuf_buffer *buf = NULL;
 327         struct videobuf_queue *q;
 328         __poll_t res = v4l2_ctrl_poll(file, wait);
 329
 330         DEB_EE("file:%p, poll:%p\n", file, wait);
 331
 332         if (vdev->vfl_type == VFL_TYPE_VBI) {
 333                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT)
 334                         return res | EPOLLOUT | EPOLLWRNORM;
 335                 if( 0 == fh->vbi_q.streaming )
 336                         return res | videobuf_poll_stream(file, &fh->vbi_q, wait);
 337                 q = &fh->vbi_q;
 338         } else {
 339                 DEB_D("using video queue\n");
 340                 q = &fh->video_q;
 341         }
 342
 343         if (!list_empty(&q->stream))
 344                 buf = list_entry(q->stream.next, struct videobuf_buffer, stream);
 345
 346         if (!buf) {
 347                 DEB_D("buf == NULL!\n");
 348                 return res | EPOLLERR;
 349         }
 350
 351         poll_wait(file, &buf->done, wait);
 352         if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) {
 353                 DEB_D("poll succeeded!\n");
 354                 return res | EPOLLIN | EPOLLRDNORM;
 355         }
 356
 357         DEB_D("nothing to poll for, buf->state:%d\n", buf->state);
 358         return res;
 359 }
 360
 361 static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait)
 362 {
 363         struct video_device *vdev = video_devdata(file);
 364         __poll_t res;
 365
 366         mutex_lock(vdev->lock);
 367         res = __fops_poll(file, wait);
 368         mutex_unlock(vdev->lock);
 369         return res;
 370 }
 371
 372 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 373 {
 374         struct video_device *vdev = video_devdata(file);
 375         struct saa7146_fh *fh = file->private_data;
 376         int ret;
 377
 378         switch (vdev->vfl_type) {
 379         case VFL_TYPE_VIDEO:
 380 /*
 381                 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun",
 382                        file, data, (unsigned long)count);
 383 */
 384                 return saa7146_video_uops.read(file,data,count,ppos);
 385         case VFL_TYPE_VBI:
 386 /*
 387                 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n",
 388                        file, data, (unsigned long)count);
 389 */
 390                 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) {
 391                         if (mutex_lock_interruptible(vdev->lock))
 392                                 return -ERESTARTSYS;
 393                         ret = saa7146_vbi_uops.read(file, data, count, ppos);
 394                         mutex_unlock(vdev->lock);
 395                         return ret;
 396                 }
 397                 return -EINVAL;
 398         default:
 399                 BUG();
 400         }
 401 }
 402
 403 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos)
 404 {
 405         struct video_device *vdev = video_devdata(file);
 406         struct saa7146_fh *fh = file->private_data;
 407         int ret;
 408
 409         switch (vdev->vfl_type) {
 410         case VFL_TYPE_VIDEO:
 411                 return -EINVAL;
 412         case VFL_TYPE_VBI:
 413                 if (fh->dev->ext_vv_data->vbi_fops.write) {
 414                         if (mutex_lock_interruptible(vdev->lock))
 415                                 return -ERESTARTSYS;
 416                         ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos);
 417                         mutex_unlock(vdev->lock);
 418                         return ret;
 419                 }
 420                 return -EINVAL;
 421         default:
 422                 BUG();
 423         }
 424 }
 425
 426 static const struct v4l2_file_operations video_fops =
 427 {
 428         .owner          = THIS_MODULE,
 429         .open           = fops_open,
 430         .release        = fops_release,
 431         .read           = fops_read,
 432         .write          = fops_write,
 433         .poll           = fops_poll,
 434         .mmap           = fops_mmap,
 435         .unlocked_ioctl = video_ioctl2,
 436 };
 437
 438 static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 439 {
 440         u32 isr = status;
 441
 442         DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status);
 443
 444         if (0 != (isr & (MASK_27))) {
 445                 DEB_INT("irq: RPS0 (0x%08x)\n", isr);
 446                 saa7146_video_uops.irq_done(dev,isr);
 447         }
 448
 449         if (0 != (isr & (MASK_28))) {
 450                 u32 mc2 = saa7146_read(dev, MC2);
 451                 if( 0 != (mc2 & MASK_15)) {
 452                         DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr);
 453                         wake_up(&dev->vv_data->vbi_wq);
 454                         saa7146_write(dev,MC2, MASK_31);
 455                         return;
 456                 }
 457                 DEB_INT("irq: RPS1 (0x%08x)\n", isr);
 458                 saa7146_vbi_uops.irq_done(dev,isr);
 459         }
 460 }
 461
 462 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
 463         .s_ctrl = saa7146_s_ctrl,
 464 };
 465
 466 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 467 {
 468         struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler;
 469         struct v4l2_pix_format *fmt;
 470         struct v4l2_vbi_format *vbi;
 471         struct saa7146_vv *vv;
 472         int err;
 473
 474         err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
 475         if (err)
 476                 return err;
 477
 478         v4l2_ctrl_handler_init(hdl, 6);
 479         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 480                 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
 481         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 482                 V4L2_CID_CONTRAST, 0, 127, 1, 64);
 483         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 484                 V4L2_CID_SATURATION, 0, 127, 1, 64);
 485         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 486                 V4L2_CID_VFLIP, 0, 1, 1, 0);
 487         v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops,
 488                 V4L2_CID_HFLIP, 0, 1, 1, 0);
 489         if (hdl->error) {
 490                 err = hdl->error;
 491                 v4l2_ctrl_handler_free(hdl);
 492                 return err;
 493         }
 494         dev->v4l2_dev.ctrl_handler = hdl;
 495
 496         vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
 497         if (vv == NULL) {
 498                 ERR("out of memory. aborting.\n");
 499                 v4l2_ctrl_handler_free(hdl);
 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                 pci_zalloc_consistent(dev->pci, SAA7146_CLIPPING_MEM,
 521                                       &vv->d_clipping.dma_handle);
 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                 return -ENOMEM;
 527         }
 528
 529         saa7146_video_uops.init(dev,vv);
 530         if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE)
 531                 saa7146_vbi_uops.init(dev,vv);
 532
 533         vv->ov_fb.fmt.width = vv->standard->h_max_out;
 534         vv->ov_fb.fmt.height = vv->standard->v_max_out;
 535         vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565;
 536         vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width;
 537         vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height;
 538         vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB;
 539
 540         fmt = &vv->video_fmt;
 541         fmt->width = 384;
 542         fmt->height = 288;
 543         fmt->pixelformat = V4L2_PIX_FMT_BGR24;
 544         fmt->field = V4L2_FIELD_ANY;
 545         fmt->colorspace = V4L2_COLORSPACE_SMPTE170M;
 546         fmt->bytesperline = 3 * fmt->width;
 547         fmt->sizeimage = fmt->bytesperline * fmt->height;
 548
 549         vbi = &vv->vbi_fmt;
 550         vbi->sampling_rate      = 27000000;
 551         vbi->offset             = 248; /* todo */
 552         vbi->samples_per_line   = 720 * 2;
 553         vbi->sample_format      = V4L2_PIX_FMT_GREY;
 554
 555         /* fixme: this only works for PAL */
 556         vbi->start[0] = 5;
 557         vbi->count[0] = 16;
 558         vbi->start[1] = 312;
 559         vbi->count[1] = 16;
 560
 561         timer_setup(&vv->vbi_read_timeout, NULL, 0);
 562
 563         vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING;
 564         vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY;
 565         dev->vv_data = vv;
 566         dev->vv_callback = &vv_callback;
 567
 568         return 0;
 569 }
 570 EXPORT_SYMBOL_GPL(saa7146_vv_init);
 571
 572 int saa7146_vv_release(struct saa7146_dev* dev)
 573 {
 574         struct saa7146_vv *vv = dev->vv_data;
 575
 576         DEB_EE("dev:%p\n", dev);
 577
 578         v4l2_device_unregister(&dev->v4l2_dev);
 579         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
 580         v4l2_ctrl_handler_free(&dev->ctrl_handler);
 581         kfree(vv);
 582         dev->vv_data = NULL;
 583         dev->vv_callback = NULL;
 584
 585         return 0;
 586 }
 587 EXPORT_SYMBOL_GPL(saa7146_vv_release);
 588
 589 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
 590                             char *name, int type)
 591 {
 592         int err;
 593         int i;
 594
 595         DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type);
 596
 597         vfd->fops = &video_fops;
 598         if (type == VFL_TYPE_VIDEO)
 599                 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops;
 600         else
 601                 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops;
 602         vfd->release = video_device_release_empty;
 603         vfd->lock = &dev->v4l2_lock;
 604         vfd->v4l2_dev = &dev->v4l2_dev;
 605         vfd->tvnorms = 0;
 606         for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 607                 vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
 608         strscpy(vfd->name, name, sizeof(vfd->name));
 609         vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
 610                            V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
 611         vfd->device_caps |= dev->ext_vv_data->capabilities;
 612         if (type == VFL_TYPE_VIDEO)
 613                 vfd->device_caps &=
 614                         ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT);
 615         else
 616                 vfd->device_caps &=
 617                         ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO);
 618         video_set_drvdata(vfd, dev);
 619
 620         err = video_register_device(vfd, type, -1);
 621         if (err < 0) {
 622                 ERR("cannot register v4l2 device. skipping.\n");
 623                 return err;
 624         }
 625
 626         pr_info("%s: registered device %s [v4l2]\n",
 627                 dev->name, video_device_node_name(vfd));
 628         return 0;
 629 }
 630 EXPORT_SYMBOL_GPL(saa7146_register_device);
 631
 632 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev)
 633 {
 634         DEB_EE("dev:%p\n", dev);
 635
 636         video_unregister_device(vfd);
 637         return 0;
 638 }
 639 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
 640
 641 static int __init saa7146_vv_init_module(void)
 642 {
 643         return 0;
 644 }
 645
 646
 647 static void __exit saa7146_vv_cleanup_module(void)
 648 {
 649 }
 650
 651 module_init(saa7146_vv_init_module);
 652 module_exit(saa7146_vv_cleanup_module);
 653
 654 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 655 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 656 MODULE_LICENSE("GPL");