1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2 3 #include <media/drv-intf/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 q->curr->vb.ts = ktime_get_ns(); 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(struct timer_list *t) 167 { 168 struct saa7146_dmaqueue *q = from_timer(q, t, timeout); 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(vdev->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(vdev->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 mutex_lock(vdev->lock); 269 270 if (vdev->vfl_type == VFL_TYPE_VBI) { 271 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 272 saa7146_vbi_uops.release(dev,file); 273 if (dev->ext_vv_data->vbi_fops.release) 274 dev->ext_vv_data->vbi_fops.release(file); 275 } else { 276 saa7146_video_uops.release(dev,file); 277 } 278 279 v4l2_fh_del(&fh->fh); 280 v4l2_fh_exit(&fh->fh); 281 module_put(dev->ext->module); 282 file->private_data = NULL; 283 kfree(fh); 284 285 mutex_unlock(vdev->lock); 286 287 return 0; 288 } 289 290 static int fops_mmap(struct file *file, struct vm_area_struct * vma) 291 { 292 struct video_device *vdev = video_devdata(file); 293 struct saa7146_fh *fh = file->private_data; 294 struct videobuf_queue *q; 295 int res; 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 } 315 316 if (mutex_lock_interruptible(vdev->lock)) 317 return -ERESTARTSYS; 318 res = videobuf_mmap_mapper(q, vma); 319 mutex_unlock(vdev->lock); 320 return res; 321 } 322 323 static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait) 324 { 325 struct video_device *vdev = video_devdata(file); 326 struct saa7146_fh *fh = file->private_data; 327 struct videobuf_buffer *buf = NULL; 328 struct videobuf_queue *q; 329 __poll_t res = v4l2_ctrl_poll(file, wait); 330 331 DEB_EE("file:%p, poll:%p\n", file, wait); 332 333 if (vdev->vfl_type == VFL_TYPE_VBI) { 334 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) 335 return res | EPOLLOUT | EPOLLWRNORM; 336 if( 0 == fh->vbi_q.streaming ) 337 return res | videobuf_poll_stream(file, &fh->vbi_q, wait); 338 q = &fh->vbi_q; 339 } else { 340 DEB_D("using video queue\n"); 341 q = &fh->video_q; 342 } 343 344 if (!list_empty(&q->stream)) 345 buf = list_entry(q->stream.next, struct videobuf_buffer, stream); 346 347 if (!buf) { 348 DEB_D("buf == NULL!\n"); 349 return res | EPOLLERR; 350 } 351 352 poll_wait(file, &buf->done, wait); 353 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) { 354 DEB_D("poll succeeded!\n"); 355 return res | EPOLLIN | EPOLLRDNORM; 356 } 357 358 DEB_D("nothing to poll for, buf->state:%d\n", buf->state); 359 return res; 360 } 361 362 static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait) 363 { 364 struct video_device *vdev = video_devdata(file); 365 __poll_t res; 366 367 mutex_lock(vdev->lock); 368 res = __fops_poll(file, wait); 369 mutex_unlock(vdev->lock); 370 return res; 371 } 372 373 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 374 { 375 struct video_device *vdev = video_devdata(file); 376 struct saa7146_fh *fh = file->private_data; 377 int ret; 378 379 switch (vdev->vfl_type) { 380 case VFL_TYPE_GRABBER: 381 /* 382 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", 383 file, data, (unsigned long)count); 384 */ 385 return saa7146_video_uops.read(file,data,count,ppos); 386 case VFL_TYPE_VBI: 387 /* 388 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", 389 file, data, (unsigned long)count); 390 */ 391 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) { 392 if (mutex_lock_interruptible(vdev->lock)) 393 return -ERESTARTSYS; 394 ret = saa7146_vbi_uops.read(file, data, count, ppos); 395 mutex_unlock(vdev->lock); 396 return ret; 397 } 398 return -EINVAL; 399 default: 400 BUG(); 401 } 402 } 403 404 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) 405 { 406 struct video_device *vdev = video_devdata(file); 407 struct saa7146_fh *fh = file->private_data; 408 int ret; 409 410 switch (vdev->vfl_type) { 411 case VFL_TYPE_GRABBER: 412 return -EINVAL; 413 case VFL_TYPE_VBI: 414 if (fh->dev->ext_vv_data->vbi_fops.write) { 415 if (mutex_lock_interruptible(vdev->lock)) 416 return -ERESTARTSYS; 417 ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); 418 mutex_unlock(vdev->lock); 419 return ret; 420 } 421 return -EINVAL; 422 default: 423 BUG(); 424 } 425 } 426 427 static const struct v4l2_file_operations video_fops = 428 { 429 .owner = THIS_MODULE, 430 .open = fops_open, 431 .release = fops_release, 432 .read = fops_read, 433 .write = fops_write, 434 .poll = fops_poll, 435 .mmap = fops_mmap, 436 .unlocked_ioctl = video_ioctl2, 437 }; 438 439 static void vv_callback(struct saa7146_dev *dev, unsigned long status) 440 { 441 u32 isr = status; 442 443 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status); 444 445 if (0 != (isr & (MASK_27))) { 446 DEB_INT("irq: RPS0 (0x%08x)\n", isr); 447 saa7146_video_uops.irq_done(dev,isr); 448 } 449 450 if (0 != (isr & (MASK_28))) { 451 u32 mc2 = saa7146_read(dev, MC2); 452 if( 0 != (mc2 & MASK_15)) { 453 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr); 454 wake_up(&dev->vv_data->vbi_wq); 455 saa7146_write(dev,MC2, MASK_31); 456 return; 457 } 458 DEB_INT("irq: RPS1 (0x%08x)\n", isr); 459 saa7146_vbi_uops.irq_done(dev,isr); 460 } 461 } 462 463 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = { 464 .s_ctrl = saa7146_s_ctrl, 465 }; 466 467 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) 468 { 469 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler; 470 struct v4l2_pix_format *fmt; 471 struct v4l2_vbi_format *vbi; 472 struct saa7146_vv *vv; 473 int err; 474 475 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); 476 if (err) 477 return err; 478 479 v4l2_ctrl_handler_init(hdl, 6); 480 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 481 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 482 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 483 V4L2_CID_CONTRAST, 0, 127, 1, 64); 484 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 485 V4L2_CID_SATURATION, 0, 127, 1, 64); 486 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 487 V4L2_CID_VFLIP, 0, 1, 1, 0); 488 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 489 V4L2_CID_HFLIP, 0, 1, 1, 0); 490 if (hdl->error) { 491 err = hdl->error; 492 v4l2_ctrl_handler_free(hdl); 493 return err; 494 } 495 dev->v4l2_dev.ctrl_handler = hdl; 496 497 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 498 if (vv == NULL) { 499 ERR("out of memory. aborting.\n"); 500 v4l2_ctrl_handler_free(hdl); 501 return -ENOMEM; 502 } 503 ext_vv->vid_ops = saa7146_video_ioctl_ops; 504 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops; 505 ext_vv->core_ops = &saa7146_video_ioctl_ops; 506 507 DEB_EE("dev:%p\n", dev); 508 509 /* set default values for video parts of the saa7146 */ 510 saa7146_write(dev, BCS_CTRL, 0x80400040); 511 512 /* enable video-port pins */ 513 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 514 515 /* save per-device extension data (one extension can 516 handle different devices that might need different 517 configuration data) */ 518 dev->ext_vv_data = ext_vv; 519 520 vv->d_clipping.cpu_addr = 521 pci_zalloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, 522 &vv->d_clipping.dma_handle); 523 if( NULL == vv->d_clipping.cpu_addr ) { 524 ERR("out of memory. aborting.\n"); 525 kfree(vv); 526 v4l2_ctrl_handler_free(hdl); 527 return -1; 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 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); 581 v4l2_ctrl_handler_free(&dev->ctrl_handler); 582 kfree(vv); 583 dev->vv_data = NULL; 584 dev->vv_callback = NULL; 585 586 return 0; 587 } 588 EXPORT_SYMBOL_GPL(saa7146_vv_release); 589 590 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev, 591 char *name, int type) 592 { 593 int err; 594 int i; 595 596 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type); 597 598 vfd->fops = &video_fops; 599 if (type == VFL_TYPE_GRABBER) 600 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops; 601 else 602 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops; 603 vfd->release = video_device_release_empty; 604 vfd->lock = &dev->v4l2_lock; 605 vfd->v4l2_dev = &dev->v4l2_dev; 606 vfd->tvnorms = 0; 607 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 608 vfd->tvnorms |= dev->ext_vv_data->stds[i].id; 609 strscpy(vfd->name, name, sizeof(vfd->name)); 610 video_set_drvdata(vfd, dev); 611 612 err = video_register_device(vfd, type, -1); 613 if (err < 0) { 614 ERR("cannot register v4l2 device. skipping.\n"); 615 return err; 616 } 617 618 pr_info("%s: registered device %s [v4l2]\n", 619 dev->name, video_device_node_name(vfd)); 620 return 0; 621 } 622 EXPORT_SYMBOL_GPL(saa7146_register_device); 623 624 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev) 625 { 626 DEB_EE("dev:%p\n", dev); 627 628 video_unregister_device(vfd); 629 return 0; 630 } 631 EXPORT_SYMBOL_GPL(saa7146_unregister_device); 632 633 static int __init saa7146_vv_init_module(void) 634 { 635 return 0; 636 } 637 638 639 static void __exit saa7146_vv_cleanup_module(void) 640 { 641 } 642 643 module_init(saa7146_vv_init_module); 644 module_exit(saa7146_vv_cleanup_module); 645 646 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); 647 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); 648 MODULE_LICENSE("GPL"); 649