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         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
  68 int 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
  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         /* 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
 111 void 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
 163 void 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
 192 static 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);
 248 out:
 249         if (fh && result != 0) {
 250                 kfree(fh);
 251                 file->private_data = NULL;
 252         }
 253         mutex_unlock(vdev->lock);
 254         return result;
 255 }
 256
 257 static 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
 287 static 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
 320 static __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
 359 static __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
 370 static 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
 401 static 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
 424 static 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
 436 static 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
 460 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = {
 461         .s_ctrl = saa7146_s_ctrl,
 462 };
 463
 464 int 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 }
 571 EXPORT_SYMBOL_GPL(saa7146_vv_init);
 572
 573 int 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 }
 589 EXPORT_SYMBOL_GPL(saa7146_vv_release);
 590
 591 int 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 }
 632 EXPORT_SYMBOL_GPL(saa7146_register_device);
 633
 634 int 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 }
 641 EXPORT_SYMBOL_GPL(saa7146_unregister_device);
 642
 643 static int __init saa7146_vv_init_module(void)
 644 {
 645         return 0;
 646 }
 647
 648
 649 static void __exit saa7146_vv_cleanup_module(void)
 650 {
 651 }
 652
 653 module_init(saa7146_vv_init_module);
 654 module_exit(saa7146_vv_cleanup_module);
 655
 656 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
 657 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware");
 658 MODULE_LICENSE("GPL");