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 BUG_ON(!q->curr); 101 102 /* finish current buffer */ 103 if (NULL == q->curr) { 104 DEB_D("aiii. no current buffer\n"); 105 return; 106 } 107 108 q->curr->vb.state = state; 109 q->curr->vb.ts = ktime_get_ns(); 110 wake_up(&q->curr->vb.done); 111 112 q->curr = NULL; 113 } 114 115 void saa7146_buffer_next(struct saa7146_dev *dev, 116 struct saa7146_dmaqueue *q, int vbi) 117 { 118 struct saa7146_buf *buf,*next = NULL; 119 120 BUG_ON(!q); 121 122 DEB_INT("dev:%p, dmaq:%p, vbi:%d\n", dev, q, vbi); 123 124 assert_spin_locked(&dev->slock); 125 if (!list_empty(&q->queue)) { 126 /* activate next one from queue */ 127 buf = list_entry(q->queue.next,struct saa7146_buf,vb.queue); 128 list_del(&buf->vb.queue); 129 if (!list_empty(&q->queue)) 130 next = list_entry(q->queue.next,struct saa7146_buf, vb.queue); 131 q->curr = buf; 132 DEB_INT("next buffer: buf:%p, prev:%p, next:%p\n", 133 buf, q->queue.prev, q->queue.next); 134 buf->activate(dev,buf,next); 135 } else { 136 DEB_INT("no next buffer. stopping.\n"); 137 if( 0 != vbi ) { 138 /* turn off video-dma3 */ 139 saa7146_write(dev,MC1, MASK_20); 140 } else { 141 /* nothing to do -- just prevent next video-dma1 transfer 142 by lowering the protection address */ 143 144 // fixme: fix this for vflip != 0 145 146 saa7146_write(dev, PROT_ADDR1, 0); 147 saa7146_write(dev, MC2, (MASK_02|MASK_18)); 148 149 /* write the address of the rps-program */ 150 saa7146_write(dev, RPS_ADDR0, dev->d_rps0.dma_handle); 151 /* turn on rps */ 152 saa7146_write(dev, MC1, (MASK_12 | MASK_28)); 153 154 /* 155 printk("vdma%d.base_even: 0x%08x\n", 1,saa7146_read(dev,BASE_EVEN1)); 156 printk("vdma%d.base_odd: 0x%08x\n", 1,saa7146_read(dev,BASE_ODD1)); 157 printk("vdma%d.prot_addr: 0x%08x\n", 1,saa7146_read(dev,PROT_ADDR1)); 158 printk("vdma%d.base_page: 0x%08x\n", 1,saa7146_read(dev,BASE_PAGE1)); 159 printk("vdma%d.pitch: 0x%08x\n", 1,saa7146_read(dev,PITCH1)); 160 printk("vdma%d.num_line_byte: 0x%08x\n", 1,saa7146_read(dev,NUM_LINE_BYTE1)); 161 */ 162 } 163 del_timer(&q->timeout); 164 } 165 } 166 167 void saa7146_buffer_timeout(struct timer_list *t) 168 { 169 struct saa7146_dmaqueue *q = from_timer(q, t, timeout); 170 struct saa7146_dev *dev = q->dev; 171 unsigned long flags; 172 173 DEB_EE("dev:%p, dmaq:%p\n", dev, q); 174 175 spin_lock_irqsave(&dev->slock,flags); 176 if (q->curr) { 177 DEB_D("timeout on %p\n", q->curr); 178 saa7146_buffer_finish(dev,q,VIDEOBUF_ERROR); 179 } 180 181 /* we don't restart the transfer here like other drivers do. when 182 a streaming capture is disabled, the timeout function will be 183 called for the current buffer. if we activate the next buffer now, 184 we mess up our capture logic. if a timeout occurs on another buffer, 185 then something is seriously broken before, so no need to buffer the 186 next capture IMHO... */ 187 /* 188 saa7146_buffer_next(dev,q); 189 */ 190 spin_unlock_irqrestore(&dev->slock,flags); 191 } 192 193 /********************************************************************************/ 194 /* file operations */ 195 196 static int fops_open(struct file *file) 197 { 198 struct video_device *vdev = video_devdata(file); 199 struct saa7146_dev *dev = video_drvdata(file); 200 struct saa7146_fh *fh = NULL; 201 int result = 0; 202 203 DEB_EE("file:%p, dev:%s\n", file, video_device_node_name(vdev)); 204 205 if (mutex_lock_interruptible(vdev->lock)) 206 return -ERESTARTSYS; 207 208 DEB_D("using: %p\n", dev); 209 210 /* check if an extension is registered */ 211 if( NULL == dev->ext ) { 212 DEB_S("no extension registered for this device\n"); 213 result = -ENODEV; 214 goto out; 215 } 216 217 /* allocate per open data */ 218 fh = kzalloc(sizeof(*fh),GFP_KERNEL); 219 if (NULL == fh) { 220 DEB_S("cannot allocate memory for per open data\n"); 221 result = -ENOMEM; 222 goto out; 223 } 224 225 v4l2_fh_init(&fh->fh, vdev); 226 227 file->private_data = &fh->fh; 228 fh->dev = dev; 229 230 if (vdev->vfl_type == VFL_TYPE_VBI) { 231 DEB_S("initializing vbi...\n"); 232 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 233 result = saa7146_vbi_uops.open(dev,file); 234 if (dev->ext_vv_data->vbi_fops.open) 235 dev->ext_vv_data->vbi_fops.open(file); 236 } else { 237 DEB_S("initializing video...\n"); 238 result = saa7146_video_uops.open(dev,file); 239 } 240 241 if (0 != result) { 242 goto out; 243 } 244 245 if( 0 == try_module_get(dev->ext->module)) { 246 result = -EINVAL; 247 goto out; 248 } 249 250 result = 0; 251 v4l2_fh_add(&fh->fh); 252 out: 253 if (fh && result != 0) { 254 kfree(fh); 255 file->private_data = NULL; 256 } 257 mutex_unlock(vdev->lock); 258 return result; 259 } 260 261 static int fops_release(struct file *file) 262 { 263 struct video_device *vdev = video_devdata(file); 264 struct saa7146_fh *fh = file->private_data; 265 struct saa7146_dev *dev = fh->dev; 266 267 DEB_EE("file:%p\n", file); 268 269 mutex_lock(vdev->lock); 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(vdev->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 int res; 297 298 switch (vdev->vfl_type) { 299 case VFL_TYPE_GRABBER: { 300 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, vma:%p\n", 301 file, vma); 302 q = &fh->video_q; 303 break; 304 } 305 case VFL_TYPE_VBI: { 306 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, vma:%p\n", 307 file, vma); 308 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) 309 return -ENODEV; 310 q = &fh->vbi_q; 311 break; 312 } 313 default: 314 BUG(); 315 } 316 317 if (mutex_lock_interruptible(vdev->lock)) 318 return -ERESTARTSYS; 319 res = videobuf_mmap_mapper(q, vma); 320 mutex_unlock(vdev->lock); 321 return res; 322 } 323 324 static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait) 325 { 326 struct video_device *vdev = video_devdata(file); 327 struct saa7146_fh *fh = file->private_data; 328 struct videobuf_buffer *buf = NULL; 329 struct videobuf_queue *q; 330 __poll_t res = v4l2_ctrl_poll(file, wait); 331 332 DEB_EE("file:%p, poll:%p\n", file, wait); 333 334 if (vdev->vfl_type == VFL_TYPE_VBI) { 335 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) 336 return res | EPOLLOUT | EPOLLWRNORM; 337 if( 0 == fh->vbi_q.streaming ) 338 return res | videobuf_poll_stream(file, &fh->vbi_q, wait); 339 q = &fh->vbi_q; 340 } else { 341 DEB_D("using video queue\n"); 342 q = &fh->video_q; 343 } 344 345 if (!list_empty(&q->stream)) 346 buf = list_entry(q->stream.next, struct videobuf_buffer, stream); 347 348 if (!buf) { 349 DEB_D("buf == NULL!\n"); 350 return res | EPOLLERR; 351 } 352 353 poll_wait(file, &buf->done, wait); 354 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) { 355 DEB_D("poll succeeded!\n"); 356 return res | EPOLLIN | EPOLLRDNORM; 357 } 358 359 DEB_D("nothing to poll for, buf->state:%d\n", buf->state); 360 return res; 361 } 362 363 static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait) 364 { 365 struct video_device *vdev = video_devdata(file); 366 __poll_t res; 367 368 mutex_lock(vdev->lock); 369 res = __fops_poll(file, wait); 370 mutex_unlock(vdev->lock); 371 return res; 372 } 373 374 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 375 { 376 struct video_device *vdev = video_devdata(file); 377 struct saa7146_fh *fh = file->private_data; 378 int ret; 379 380 switch (vdev->vfl_type) { 381 case VFL_TYPE_GRABBER: 382 /* 383 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", 384 file, data, (unsigned long)count); 385 */ 386 return saa7146_video_uops.read(file,data,count,ppos); 387 case VFL_TYPE_VBI: 388 /* 389 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", 390 file, data, (unsigned long)count); 391 */ 392 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) { 393 if (mutex_lock_interruptible(vdev->lock)) 394 return -ERESTARTSYS; 395 ret = saa7146_vbi_uops.read(file, data, count, ppos); 396 mutex_unlock(vdev->lock); 397 return ret; 398 } 399 return -EINVAL; 400 default: 401 BUG(); 402 } 403 } 404 405 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) 406 { 407 struct video_device *vdev = video_devdata(file); 408 struct saa7146_fh *fh = file->private_data; 409 int ret; 410 411 switch (vdev->vfl_type) { 412 case VFL_TYPE_GRABBER: 413 return -EINVAL; 414 case VFL_TYPE_VBI: 415 if (fh->dev->ext_vv_data->vbi_fops.write) { 416 if (mutex_lock_interruptible(vdev->lock)) 417 return -ERESTARTSYS; 418 ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); 419 mutex_unlock(vdev->lock); 420 return ret; 421 } 422 return -EINVAL; 423 default: 424 BUG(); 425 } 426 } 427 428 static const struct v4l2_file_operations video_fops = 429 { 430 .owner = THIS_MODULE, 431 .open = fops_open, 432 .release = fops_release, 433 .read = fops_read, 434 .write = fops_write, 435 .poll = fops_poll, 436 .mmap = fops_mmap, 437 .unlocked_ioctl = video_ioctl2, 438 }; 439 440 static void vv_callback(struct saa7146_dev *dev, unsigned long status) 441 { 442 u32 isr = status; 443 444 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status); 445 446 if (0 != (isr & (MASK_27))) { 447 DEB_INT("irq: RPS0 (0x%08x)\n", isr); 448 saa7146_video_uops.irq_done(dev,isr); 449 } 450 451 if (0 != (isr & (MASK_28))) { 452 u32 mc2 = saa7146_read(dev, MC2); 453 if( 0 != (mc2 & MASK_15)) { 454 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr); 455 wake_up(&dev->vv_data->vbi_wq); 456 saa7146_write(dev,MC2, MASK_31); 457 return; 458 } 459 DEB_INT("irq: RPS1 (0x%08x)\n", isr); 460 saa7146_vbi_uops.irq_done(dev,isr); 461 } 462 } 463 464 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = { 465 .s_ctrl = saa7146_s_ctrl, 466 }; 467 468 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) 469 { 470 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler; 471 struct v4l2_pix_format *fmt; 472 struct v4l2_vbi_format *vbi; 473 struct saa7146_vv *vv; 474 int err; 475 476 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); 477 if (err) 478 return err; 479 480 v4l2_ctrl_handler_init(hdl, 6); 481 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 482 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 483 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 484 V4L2_CID_CONTRAST, 0, 127, 1, 64); 485 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 486 V4L2_CID_SATURATION, 0, 127, 1, 64); 487 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 488 V4L2_CID_VFLIP, 0, 1, 1, 0); 489 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 490 V4L2_CID_HFLIP, 0, 1, 1, 0); 491 if (hdl->error) { 492 err = hdl->error; 493 v4l2_ctrl_handler_free(hdl); 494 return err; 495 } 496 dev->v4l2_dev.ctrl_handler = hdl; 497 498 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 499 if (vv == NULL) { 500 ERR("out of memory. aborting.\n"); 501 v4l2_ctrl_handler_free(hdl); 502 return -ENOMEM; 503 } 504 ext_vv->vid_ops = saa7146_video_ioctl_ops; 505 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops; 506 ext_vv->core_ops = &saa7146_video_ioctl_ops; 507 508 DEB_EE("dev:%p\n", dev); 509 510 /* set default values for video parts of the saa7146 */ 511 saa7146_write(dev, BCS_CTRL, 0x80400040); 512 513 /* enable video-port pins */ 514 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 515 516 /* save per-device extension data (one extension can 517 handle different devices that might need different 518 configuration data) */ 519 dev->ext_vv_data = ext_vv; 520 521 vv->d_clipping.cpu_addr = 522 pci_zalloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, 523 &vv->d_clipping.dma_handle); 524 if( NULL == vv->d_clipping.cpu_addr ) { 525 ERR("out of memory. aborting.\n"); 526 kfree(vv); 527 v4l2_ctrl_handler_free(hdl); 528 return -1; 529 } 530 531 saa7146_video_uops.init(dev,vv); 532 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 533 saa7146_vbi_uops.init(dev,vv); 534 535 vv->ov_fb.fmt.width = vv->standard->h_max_out; 536 vv->ov_fb.fmt.height = vv->standard->v_max_out; 537 vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565; 538 vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width; 539 vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height; 540 vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB; 541 542 fmt = &vv->video_fmt; 543 fmt->width = 384; 544 fmt->height = 288; 545 fmt->pixelformat = V4L2_PIX_FMT_BGR24; 546 fmt->field = V4L2_FIELD_ANY; 547 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; 548 fmt->bytesperline = 3 * fmt->width; 549 fmt->sizeimage = fmt->bytesperline * fmt->height; 550 551 vbi = &vv->vbi_fmt; 552 vbi->sampling_rate = 27000000; 553 vbi->offset = 248; /* todo */ 554 vbi->samples_per_line = 720 * 2; 555 vbi->sample_format = V4L2_PIX_FMT_GREY; 556 557 /* fixme: this only works for PAL */ 558 vbi->start[0] = 5; 559 vbi->count[0] = 16; 560 vbi->start[1] = 312; 561 vbi->count[1] = 16; 562 563 timer_setup(&vv->vbi_read_timeout, NULL, 0); 564 565 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING; 566 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY; 567 dev->vv_data = vv; 568 dev->vv_callback = &vv_callback; 569 570 return 0; 571 } 572 EXPORT_SYMBOL_GPL(saa7146_vv_init); 573 574 int saa7146_vv_release(struct saa7146_dev* dev) 575 { 576 struct saa7146_vv *vv = dev->vv_data; 577 578 DEB_EE("dev:%p\n", dev); 579 580 v4l2_device_unregister(&dev->v4l2_dev); 581 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, 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_GRABBER) 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_GRABBER) 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"); 659