1 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 2 3 #include <media/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 do_gettimeofday(&q->curr->vb.ts); 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(unsigned long data) 167 { 168 struct saa7146_dmaqueue *q = (struct saa7146_dmaqueue*)data; 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 if (mutex_lock_interruptible(vdev->lock)) 269 return -ERESTARTSYS; 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 return 0; 316 } 317 318 if (mutex_lock_interruptible(vdev->lock)) 319 return -ERESTARTSYS; 320 res = videobuf_mmap_mapper(q, vma); 321 mutex_unlock(vdev->lock); 322 return res; 323 } 324 325 static unsigned int __fops_poll(struct file *file, struct poll_table_struct *wait) 326 { 327 struct video_device *vdev = video_devdata(file); 328 struct saa7146_fh *fh = file->private_data; 329 struct videobuf_buffer *buf = NULL; 330 struct videobuf_queue *q; 331 unsigned int res = v4l2_ctrl_poll(file, wait); 332 333 DEB_EE("file:%p, poll:%p\n", file, wait); 334 335 if (vdev->vfl_type == VFL_TYPE_VBI) { 336 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_SLICED_VBI_OUTPUT) 337 return res | POLLOUT | POLLWRNORM; 338 if( 0 == fh->vbi_q.streaming ) 339 return res | videobuf_poll_stream(file, &fh->vbi_q, wait); 340 q = &fh->vbi_q; 341 } else { 342 DEB_D("using video queue\n"); 343 q = &fh->video_q; 344 } 345 346 if (!list_empty(&q->stream)) 347 buf = list_entry(q->stream.next, struct videobuf_buffer, stream); 348 349 if (!buf) { 350 DEB_D("buf == NULL!\n"); 351 return res | POLLERR; 352 } 353 354 poll_wait(file, &buf->done, wait); 355 if (buf->state == VIDEOBUF_DONE || buf->state == VIDEOBUF_ERROR) { 356 DEB_D("poll succeeded!\n"); 357 return res | POLLIN | POLLRDNORM; 358 } 359 360 DEB_D("nothing to poll for, buf->state:%d\n", buf->state); 361 return res; 362 } 363 364 static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait) 365 { 366 struct video_device *vdev = video_devdata(file); 367 unsigned int res; 368 369 mutex_lock(vdev->lock); 370 res = __fops_poll(file, wait); 371 mutex_unlock(vdev->lock); 372 return res; 373 } 374 375 static ssize_t fops_read(struct file *file, char __user *data, size_t count, loff_t *ppos) 376 { 377 struct video_device *vdev = video_devdata(file); 378 struct saa7146_fh *fh = file->private_data; 379 int ret; 380 381 switch (vdev->vfl_type) { 382 case VFL_TYPE_GRABBER: 383 /* 384 DEB_EE("V4L2_BUF_TYPE_VIDEO_CAPTURE: file:%p, data:%p, count:%lun", 385 file, data, (unsigned long)count); 386 */ 387 return saa7146_video_uops.read(file,data,count,ppos); 388 case VFL_TYPE_VBI: 389 /* 390 DEB_EE("V4L2_BUF_TYPE_VBI_CAPTURE: file:%p, data:%p, count:%lu\n", 391 file, data, (unsigned long)count); 392 */ 393 if (fh->dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) { 394 if (mutex_lock_interruptible(vdev->lock)) 395 return -ERESTARTSYS; 396 ret = saa7146_vbi_uops.read(file, data, count, ppos); 397 mutex_unlock(vdev->lock); 398 return ret; 399 } 400 return -EINVAL; 401 default: 402 BUG(); 403 return 0; 404 } 405 } 406 407 static ssize_t fops_write(struct file *file, const char __user *data, size_t count, loff_t *ppos) 408 { 409 struct video_device *vdev = video_devdata(file); 410 struct saa7146_fh *fh = file->private_data; 411 int ret; 412 413 switch (vdev->vfl_type) { 414 case VFL_TYPE_GRABBER: 415 return -EINVAL; 416 case VFL_TYPE_VBI: 417 if (fh->dev->ext_vv_data->vbi_fops.write) { 418 if (mutex_lock_interruptible(vdev->lock)) 419 return -ERESTARTSYS; 420 ret = fh->dev->ext_vv_data->vbi_fops.write(file, data, count, ppos); 421 mutex_unlock(vdev->lock); 422 return ret; 423 } 424 return -EINVAL; 425 default: 426 BUG(); 427 return -EINVAL; 428 } 429 } 430 431 static const struct v4l2_file_operations video_fops = 432 { 433 .owner = THIS_MODULE, 434 .open = fops_open, 435 .release = fops_release, 436 .read = fops_read, 437 .write = fops_write, 438 .poll = fops_poll, 439 .mmap = fops_mmap, 440 .unlocked_ioctl = video_ioctl2, 441 }; 442 443 static void vv_callback(struct saa7146_dev *dev, unsigned long status) 444 { 445 u32 isr = status; 446 447 DEB_INT("dev:%p, isr:0x%08x\n", dev, (u32)status); 448 449 if (0 != (isr & (MASK_27))) { 450 DEB_INT("irq: RPS0 (0x%08x)\n", isr); 451 saa7146_video_uops.irq_done(dev,isr); 452 } 453 454 if (0 != (isr & (MASK_28))) { 455 u32 mc2 = saa7146_read(dev, MC2); 456 if( 0 != (mc2 & MASK_15)) { 457 DEB_INT("irq: RPS1 vbi workaround (0x%08x)\n", isr); 458 wake_up(&dev->vv_data->vbi_wq); 459 saa7146_write(dev,MC2, MASK_31); 460 return; 461 } 462 DEB_INT("irq: RPS1 (0x%08x)\n", isr); 463 saa7146_vbi_uops.irq_done(dev,isr); 464 } 465 } 466 467 static const struct v4l2_ctrl_ops saa7146_ctrl_ops = { 468 .s_ctrl = saa7146_s_ctrl, 469 }; 470 471 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv) 472 { 473 struct v4l2_ctrl_handler *hdl = &dev->ctrl_handler; 474 struct v4l2_pix_format *fmt; 475 struct v4l2_vbi_format *vbi; 476 struct saa7146_vv *vv; 477 int err; 478 479 err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev); 480 if (err) 481 return err; 482 483 v4l2_ctrl_handler_init(hdl, 6); 484 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 485 V4L2_CID_BRIGHTNESS, 0, 255, 1, 128); 486 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 487 V4L2_CID_CONTRAST, 0, 127, 1, 64); 488 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 489 V4L2_CID_SATURATION, 0, 127, 1, 64); 490 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 491 V4L2_CID_VFLIP, 0, 1, 1, 0); 492 v4l2_ctrl_new_std(hdl, &saa7146_ctrl_ops, 493 V4L2_CID_HFLIP, 0, 1, 1, 0); 494 if (hdl->error) { 495 err = hdl->error; 496 v4l2_ctrl_handler_free(hdl); 497 return err; 498 } 499 dev->v4l2_dev.ctrl_handler = hdl; 500 501 vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL); 502 if (vv == NULL) { 503 ERR("out of memory. aborting.\n"); 504 v4l2_ctrl_handler_free(hdl); 505 return -ENOMEM; 506 } 507 ext_vv->vid_ops = saa7146_video_ioctl_ops; 508 ext_vv->vbi_ops = saa7146_vbi_ioctl_ops; 509 ext_vv->core_ops = &saa7146_video_ioctl_ops; 510 511 DEB_EE("dev:%p\n", dev); 512 513 /* set default values for video parts of the saa7146 */ 514 saa7146_write(dev, BCS_CTRL, 0x80400040); 515 516 /* enable video-port pins */ 517 saa7146_write(dev, MC1, (MASK_10 | MASK_26)); 518 519 /* save per-device extension data (one extension can 520 handle different devices that might need different 521 configuration data) */ 522 dev->ext_vv_data = ext_vv; 523 524 vv->d_clipping.cpu_addr = pci_alloc_consistent(dev->pci, SAA7146_CLIPPING_MEM, &vv->d_clipping.dma_handle); 525 if( NULL == vv->d_clipping.cpu_addr ) { 526 ERR("out of memory. aborting.\n"); 527 kfree(vv); 528 v4l2_ctrl_handler_free(hdl); 529 return -1; 530 } 531 memset(vv->d_clipping.cpu_addr, 0x0, SAA7146_CLIPPING_MEM); 532 533 saa7146_video_uops.init(dev,vv); 534 if (dev->ext_vv_data->capabilities & V4L2_CAP_VBI_CAPTURE) 535 saa7146_vbi_uops.init(dev,vv); 536 537 fmt = &vv->ov_fb.fmt; 538 fmt->width = vv->standard->h_max_out; 539 fmt->height = vv->standard->v_max_out; 540 fmt->pixelformat = V4L2_PIX_FMT_RGB565; 541 fmt->bytesperline = 2 * fmt->width; 542 fmt->sizeimage = fmt->bytesperline * fmt->height; 543 fmt->colorspace = V4L2_COLORSPACE_SRGB; 544 545 fmt = &vv->video_fmt; 546 fmt->width = 384; 547 fmt->height = 288; 548 fmt->pixelformat = V4L2_PIX_FMT_BGR24; 549 fmt->field = V4L2_FIELD_ANY; 550 fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; 551 fmt->bytesperline = 3 * fmt->width; 552 fmt->sizeimage = fmt->bytesperline * fmt->height; 553 554 vbi = &vv->vbi_fmt; 555 vbi->sampling_rate = 27000000; 556 vbi->offset = 248; /* todo */ 557 vbi->samples_per_line = 720 * 2; 558 vbi->sample_format = V4L2_PIX_FMT_GREY; 559 560 /* fixme: this only works for PAL */ 561 vbi->start[0] = 5; 562 vbi->count[0] = 16; 563 vbi->start[1] = 312; 564 vbi->count[1] = 16; 565 566 init_timer(&vv->vbi_read_timeout); 567 568 vv->ov_fb.capability = V4L2_FBUF_CAP_LIST_CLIPPING; 569 vv->ov_fb.flags = V4L2_FBUF_FLAG_PRIMARY; 570 dev->vv_data = vv; 571 dev->vv_callback = &vv_callback; 572 573 return 0; 574 } 575 EXPORT_SYMBOL_GPL(saa7146_vv_init); 576 577 int saa7146_vv_release(struct saa7146_dev* dev) 578 { 579 struct saa7146_vv *vv = dev->vv_data; 580 581 DEB_EE("dev:%p\n", dev); 582 583 v4l2_device_unregister(&dev->v4l2_dev); 584 pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle); 585 v4l2_ctrl_handler_free(&dev->ctrl_handler); 586 kfree(vv); 587 dev->vv_data = NULL; 588 dev->vv_callback = NULL; 589 590 return 0; 591 } 592 EXPORT_SYMBOL_GPL(saa7146_vv_release); 593 594 int saa7146_register_device(struct video_device **vid, struct saa7146_dev* dev, 595 char *name, int type) 596 { 597 struct video_device *vfd; 598 int err; 599 int i; 600 601 DEB_EE("dev:%p, name:'%s', type:%d\n", dev, name, type); 602 603 // released by vfd->release 604 vfd = video_device_alloc(); 605 if (vfd == NULL) 606 return -ENOMEM; 607 608 vfd->fops = &video_fops; 609 if (type == VFL_TYPE_GRABBER) 610 vfd->ioctl_ops = &dev->ext_vv_data->vid_ops; 611 else 612 vfd->ioctl_ops = &dev->ext_vv_data->vbi_ops; 613 vfd->release = video_device_release; 614 vfd->lock = &dev->v4l2_lock; 615 vfd->v4l2_dev = &dev->v4l2_dev; 616 vfd->tvnorms = 0; 617 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 618 for (i = 0; i < dev->ext_vv_data->num_stds; i++) 619 vfd->tvnorms |= dev->ext_vv_data->stds[i].id; 620 strlcpy(vfd->name, name, sizeof(vfd->name)); 621 video_set_drvdata(vfd, dev); 622 623 err = video_register_device(vfd, type, -1); 624 if (err < 0) { 625 ERR("cannot register v4l2 device. skipping.\n"); 626 video_device_release(vfd); 627 return err; 628 } 629 630 pr_info("%s: registered device %s [v4l2]\n", 631 dev->name, video_device_node_name(vfd)); 632 633 *vid = vfd; 634 return 0; 635 } 636 EXPORT_SYMBOL_GPL(saa7146_register_device); 637 638 int saa7146_unregister_device(struct video_device **vid, struct saa7146_dev* dev) 639 { 640 DEB_EE("dev:%p\n", dev); 641 642 video_unregister_device(*vid); 643 *vid = NULL; 644 645 return 0; 646 } 647 EXPORT_SYMBOL_GPL(saa7146_unregister_device); 648 649 static int __init saa7146_vv_init_module(void) 650 { 651 return 0; 652 } 653 654 655 static void __exit saa7146_vv_cleanup_module(void) 656 { 657 } 658 659 module_init(saa7146_vv_init_module); 660 module_exit(saa7146_vv_cleanup_module); 661 662 MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); 663 MODULE_DESCRIPTION("video4linux driver for saa7146-based hardware"); 664 MODULE_LICENSE("GPL"); 665