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 -1; 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"); 657