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 return err; 491 } 492 dev->v4l2_dev.ctrl_handler = hdl; 493 494 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 495 if (vv == NULL) { 496 ERR("out of memory. aborting.\n"); 497 v4l2_ctrl_handler_free(hdl); 498 return -ENOMEM; 499 } 500 ext_vv->vid_ops = saa7146_video_ioctl_ops; 501 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops; 502 ext_vv->core_ops = &saa7146_video_ioctl_ops; 503 504 DEB_EE("dev:%p\n", dev); 505 506 /* set default values for video parts of the saa7146 */ 507 saa7146_write(dev, BCS_CTRL, 0x80400040); 508 509 /* enable video-port pins */ 510 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 511 512 /* save per-device extension data (one extension can 513 handle different devices that might need different 514 configuration data) */ 515 dev->ext_vv_data = ext_vv; 516 517 vv->d_clipping.cpu_addr = 518 dma_alloc_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM, 519 &vv->d_clipping.dma_handle, GFP_KERNEL); 520 if( NULL == vv->d_clipping.cpu_addr ) { 521 ERR("out of memory. aborting.\n"); 522 kfree(vv); 523 v4l2_ctrl_handler_free(hdl); 524 return -1; 525 } 526 527 saa7146_video_uops.init(dev,vv); 528 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 529 saa7146_vbi_uops.init(dev,vv); 530 531 vv->ov_fb.fmt.width = vv->standard->h_max_out; 532 vv->ov_fb.fmt.height = vv->standard->v_max_out; 533 vv->ov_fb.fmt.pixelformat = V4L2_PIX_FMT_RGB565; 534 vv->ov_fb.fmt.bytesperline = 2 * vv->ov_fb.fmt.width; 535 vv->ov_fb.fmt.sizeimage = vv->ov_fb.fmt.bytesperline * vv->ov_fb.fmt.height; 536 vv->ov_fb.fmt.colorspace = V4L2_COLORSPACE_SRGB; 537 538 fmt = &vv->video_fmt; 539 fmt->width = 384; 540 fmt->height = 288; 541 fmt->pixelformat = V4L2_PIX_FMT_BGR24; 542 fmt->field = V4L2_FIELD_ANY; 543 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; 544 fmt->bytesperline = 3 * fmt->width; 545 fmt->sizeimage = fmt->bytesperline * fmt->height; 546 547 vbi = &vv->vbi_fmt; 548 vbi->sampling_rate = 27000000; 549 vbi->offset = 248; /* todo */ 550 vbi->samples_per_line = 720 * 2; 551 vbi->sample_format = V4L2_PIX_FMT_GREY; 552 553 /* fixme: this only works for PAL */ 554 vbi->start[0] = 5; 555 vbi->count[0] = 16; 556 vbi->start[1] = 312; 557 vbi->count[1] = 16; 558 559 timer_setup(&vv->vbi_read_timeout, NULL, 0); 560 561 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING; 562 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY; 563 dev->vv_data = vv; 564 dev->vv_callback = &vv_callback; 565 566 return 0; 567 } 568 EXPORT_SYMBOL_GPL(saa7146_vv_init); 569 570 int saa7146_vv_release(struct saa7146_dev* dev) 571 { 572 struct saa7146_vv *vv = dev->vv_data; 573 574 DEB_EE("dev:%p\n", dev); 575 576 v4l2_device_unregister(&dev->v4l2_dev); 577 dma_free_coherent(&dev->pci->dev, SAA7146_CLIPPING_MEM, 578 vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); 579 v4l2_ctrl_handler_free(&dev->ctrl_handler); 580 kfree(vv); 581 dev->vv_data = NULL; 582 dev->vv_callback = NULL; 583 584 return 0; 585 } 586 EXPORT_SYMBOL_GPL(saa7146_vv_release); 587 588 int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev, 589 char *name, int type) 590 { 591 int err; 592 int i; 593 594 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type); 595 596 vfd->fops = &video_fops; 597 if (type == VFL_TYPE_VIDEO) 598 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops; 599 else 600 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops; 601 vfd->release = video_device_release_empty; 602 vfd->lock = &dev->v4l2_lock; 603 vfd->v4l2_dev = &dev->v4l2_dev; 604 vfd->tvnorms = 0; 605 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 606 vfd->tvnorms |= dev->ext_vv_data->stds[i].id; 607 strscpy(vfd->name, name, sizeof(vfd->name)); 608 vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | 609 V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; 610 vfd->device_caps |= dev->ext_vv_data->capabilities; 611 if (type == VFL_TYPE_VIDEO) 612 vfd->device_caps &= 613 ~(V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_OUTPUT); 614 else 615 vfd->device_caps &= 616 ~(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY | V4L2_CAP_AUDIO); 617 video_set_drvdata(vfd, dev); 618 619 err = video_register_device(vfd, type, -1); 620 if (err < 0) { 621 ERR("cannot register v4l2 device. skipping.\n"); 622 return err; 623 } 624 625 pr_info("%s: registered device %s [v4l2]\n", 626 dev->name, video_device_node_name(vfd)); 627 return 0; 628 } 629 EXPORT_SYMBOL_GPL(saa7146_register_device); 630 631 int saa7146_unregister_device(struct video_device *vfd, struct saa7146_dev *dev) 632 { 633 DEB_EE("dev:%p\n", dev); 634 635 video_unregister_device(vfd); 636 return 0; 637 } 638 EXPORT_SYMBOL_GPL(saa7146_unregister_device); 639 640 static int __init saa7146_vv_init_module(void) 641 { 642 return 0; 643 } 644 645 646 static void __exit saa7146_vv_cleanup_module(void) 647 { 648 } 649 650 module_init(saa7146_vv_init_module); 651 module_exit(saa7146_vv_cleanup_module); 652 653 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); 654 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); 655 MODULE_LICENSE("GPL"); 656