1 /* 2 * uvc_v4l2.c -- USB Video Class driver - V4L2 API 3 * 4 * Copyright (C) 2005-2010 5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 */ 13 14 #include <linux/compat.h> 15 #include <linux/kernel.h> 16 #include <linux/list.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <linux/usb.h> 20 #include <linux/videodev2.h> 21 #include <linux/vmalloc.h> 22 #include <linux/mm.h> 23 #include <linux/wait.h> 24 #include <linux/atomic.h> 25 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-ctrls.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-ioctl.h> 30 31 #include "uvcvideo.h" 32 33 /* ------------------------------------------------------------------------ 34 * UVC ioctls 35 */ 36 static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain, 37 struct uvc_xu_control_mapping *xmap) 38 { 39 struct uvc_control_mapping *map; 40 unsigned int size; 41 int ret; 42 43 map = kzalloc(sizeof *map, GFP_KERNEL); 44 if (map == NULL) 45 return -ENOMEM; 46 47 map->id = xmap->id; 48 memcpy(map->name, xmap->name, sizeof map->name); 49 memcpy(map->entity, xmap->entity, sizeof map->entity); 50 map->selector = xmap->selector; 51 map->size = xmap->size; 52 map->offset = xmap->offset; 53 map->v4l2_type = xmap->v4l2_type; 54 map->data_type = xmap->data_type; 55 56 switch (xmap->v4l2_type) { 57 case V4L2_CTRL_TYPE_INTEGER: 58 case V4L2_CTRL_TYPE_BOOLEAN: 59 case V4L2_CTRL_TYPE_BUTTON: 60 break; 61 62 case V4L2_CTRL_TYPE_MENU: 63 /* Prevent excessive memory consumption, as well as integer 64 * overflows. 65 */ 66 if (xmap->menu_count == 0 || 67 xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) { 68 ret = -EINVAL; 69 goto free_map; 70 } 71 72 size = xmap->menu_count * sizeof(*map->menu_info); 73 map->menu_info = memdup_user(xmap->menu_info, size); 74 if (IS_ERR(map->menu_info)) { 75 ret = PTR_ERR(map->menu_info); 76 goto free_map; 77 } 78 79 map->menu_count = xmap->menu_count; 80 break; 81 82 default: 83 uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type " 84 "%u.\n", xmap->v4l2_type); 85 ret = -ENOTTY; 86 goto free_map; 87 } 88 89 ret = uvc_ctrl_add_mapping(chain, map); 90 91 kfree(map->menu_info); 92 free_map: 93 kfree(map); 94 95 return ret; 96 } 97 98 /* ------------------------------------------------------------------------ 99 * V4L2 interface 100 */ 101 102 /* 103 * Find the frame interval closest to the requested frame interval for the 104 * given frame format and size. This should be done by the device as part of 105 * the Video Probe and Commit negotiation, but some hardware don't implement 106 * that feature. 107 */ 108 static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) 109 { 110 unsigned int i; 111 112 if (frame->bFrameIntervalType) { 113 __u32 best = -1, dist; 114 115 for (i = 0; i < frame->bFrameIntervalType; ++i) { 116 dist = interval > frame->dwFrameInterval[i] 117 ? interval - frame->dwFrameInterval[i] 118 : frame->dwFrameInterval[i] - interval; 119 120 if (dist > best) 121 break; 122 123 best = dist; 124 } 125 126 interval = frame->dwFrameInterval[i-1]; 127 } else { 128 const __u32 min = frame->dwFrameInterval[0]; 129 const __u32 max = frame->dwFrameInterval[1]; 130 const __u32 step = frame->dwFrameInterval[2]; 131 132 interval = min + (interval - min + step/2) / step * step; 133 if (interval > max) 134 interval = max; 135 } 136 137 return interval; 138 } 139 140 static __u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format, 141 const struct uvc_frame *frame) 142 { 143 switch (format->fcc) { 144 case V4L2_PIX_FMT_NV12: 145 case V4L2_PIX_FMT_YVU420: 146 case V4L2_PIX_FMT_YUV420: 147 case V4L2_PIX_FMT_M420: 148 return frame->wWidth; 149 150 default: 151 return format->bpp * frame->wWidth / 8; 152 } 153 } 154 155 static int uvc_v4l2_try_format(struct uvc_streaming *stream, 156 struct v4l2_format *fmt, struct uvc_streaming_control *probe, 157 struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) 158 { 159 struct uvc_format *format = NULL; 160 struct uvc_frame *frame = NULL; 161 __u16 rw, rh; 162 unsigned int d, maxd; 163 unsigned int i; 164 __u32 interval; 165 int ret = 0; 166 __u8 *fcc; 167 168 if (fmt->type != stream->type) 169 return -EINVAL; 170 171 fcc = (__u8 *)&fmt->fmt.pix.pixelformat; 172 uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", 173 fmt->fmt.pix.pixelformat, 174 fcc[0], fcc[1], fcc[2], fcc[3], 175 fmt->fmt.pix.width, fmt->fmt.pix.height); 176 177 /* Check if the hardware supports the requested format, use the default 178 * format otherwise. 179 */ 180 for (i = 0; i < stream->nformats; ++i) { 181 format = &stream->format[i]; 182 if (format->fcc == fmt->fmt.pix.pixelformat) 183 break; 184 } 185 186 if (i == stream->nformats) { 187 format = stream->def_format; 188 fmt->fmt.pix.pixelformat = format->fcc; 189 } 190 191 /* Find the closest image size. The distance between image sizes is 192 * the size in pixels of the non-overlapping regions between the 193 * requested size and the frame-specified size. 194 */ 195 rw = fmt->fmt.pix.width; 196 rh = fmt->fmt.pix.height; 197 maxd = (unsigned int)-1; 198 199 for (i = 0; i < format->nframes; ++i) { 200 __u16 w = format->frame[i].wWidth; 201 __u16 h = format->frame[i].wHeight; 202 203 d = min(w, rw) * min(h, rh); 204 d = w*h + rw*rh - 2*d; 205 if (d < maxd) { 206 maxd = d; 207 frame = &format->frame[i]; 208 } 209 210 if (maxd == 0) 211 break; 212 } 213 214 if (frame == NULL) { 215 uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", 216 fmt->fmt.pix.width, fmt->fmt.pix.height); 217 return -EINVAL; 218 } 219 220 /* Use the default frame interval. */ 221 interval = frame->dwDefaultFrameInterval; 222 uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " 223 "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, 224 (100000000/interval)%10); 225 226 /* Set the format index, frame index and frame interval. */ 227 memset(probe, 0, sizeof *probe); 228 probe->bmHint = 1; /* dwFrameInterval */ 229 probe->bFormatIndex = format->index; 230 probe->bFrameIndex = frame->bFrameIndex; 231 probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); 232 /* Some webcams stall the probe control set request when the 233 * dwMaxVideoFrameSize field is set to zero. The UVC specification 234 * clearly states that the field is read-only from the host, so this 235 * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by 236 * the webcam to work around the problem. 237 * 238 * The workaround could probably be enabled for all webcams, so the 239 * quirk can be removed if needed. It's currently useful to detect 240 * webcam bugs and fix them before they hit the market (providing 241 * developers test their webcams with the Linux driver as well as with 242 * the Windows driver). 243 */ 244 mutex_lock(&stream->mutex); 245 if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) 246 probe->dwMaxVideoFrameSize = 247 stream->ctrl.dwMaxVideoFrameSize; 248 249 /* Probe the device. */ 250 ret = uvc_probe_video(stream, probe); 251 mutex_unlock(&stream->mutex); 252 if (ret < 0) 253 goto done; 254 255 fmt->fmt.pix.width = frame->wWidth; 256 fmt->fmt.pix.height = frame->wHeight; 257 fmt->fmt.pix.field = V4L2_FIELD_NONE; 258 fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame); 259 fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; 260 fmt->fmt.pix.colorspace = format->colorspace; 261 fmt->fmt.pix.priv = 0; 262 263 if (uvc_format != NULL) 264 *uvc_format = format; 265 if (uvc_frame != NULL) 266 *uvc_frame = frame; 267 268 done: 269 return ret; 270 } 271 272 static int uvc_v4l2_get_format(struct uvc_streaming *stream, 273 struct v4l2_format *fmt) 274 { 275 struct uvc_format *format; 276 struct uvc_frame *frame; 277 int ret = 0; 278 279 if (fmt->type != stream->type) 280 return -EINVAL; 281 282 mutex_lock(&stream->mutex); 283 format = stream->cur_format; 284 frame = stream->cur_frame; 285 286 if (format == NULL || frame == NULL) { 287 ret = -EINVAL; 288 goto done; 289 } 290 291 fmt->fmt.pix.pixelformat = format->fcc; 292 fmt->fmt.pix.width = frame->wWidth; 293 fmt->fmt.pix.height = frame->wHeight; 294 fmt->fmt.pix.field = V4L2_FIELD_NONE; 295 fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame); 296 fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; 297 fmt->fmt.pix.colorspace = format->colorspace; 298 fmt->fmt.pix.priv = 0; 299 300 done: 301 mutex_unlock(&stream->mutex); 302 return ret; 303 } 304 305 static int uvc_v4l2_set_format(struct uvc_streaming *stream, 306 struct v4l2_format *fmt) 307 { 308 struct uvc_streaming_control probe; 309 struct uvc_format *format; 310 struct uvc_frame *frame; 311 int ret; 312 313 if (fmt->type != stream->type) 314 return -EINVAL; 315 316 ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); 317 if (ret < 0) 318 return ret; 319 320 mutex_lock(&stream->mutex); 321 322 if (uvc_queue_allocated(&stream->queue)) { 323 ret = -EBUSY; 324 goto done; 325 } 326 327 stream->ctrl = probe; 328 stream->cur_format = format; 329 stream->cur_frame = frame; 330 331 done: 332 mutex_unlock(&stream->mutex); 333 return ret; 334 } 335 336 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, 337 struct v4l2_streamparm *parm) 338 { 339 uint32_t numerator, denominator; 340 341 if (parm->type != stream->type) 342 return -EINVAL; 343 344 mutex_lock(&stream->mutex); 345 numerator = stream->ctrl.dwFrameInterval; 346 mutex_unlock(&stream->mutex); 347 348 denominator = 10000000; 349 uvc_simplify_fraction(&numerator, &denominator, 8, 333); 350 351 memset(parm, 0, sizeof *parm); 352 parm->type = stream->type; 353 354 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 355 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 356 parm->parm.capture.capturemode = 0; 357 parm->parm.capture.timeperframe.numerator = numerator; 358 parm->parm.capture.timeperframe.denominator = denominator; 359 parm->parm.capture.extendedmode = 0; 360 parm->parm.capture.readbuffers = 0; 361 } else { 362 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; 363 parm->parm.output.outputmode = 0; 364 parm->parm.output.timeperframe.numerator = numerator; 365 parm->parm.output.timeperframe.denominator = denominator; 366 } 367 368 return 0; 369 } 370 371 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, 372 struct v4l2_streamparm *parm) 373 { 374 struct uvc_streaming_control probe; 375 struct v4l2_fract timeperframe; 376 uint32_t interval; 377 int ret; 378 379 if (parm->type != stream->type) 380 return -EINVAL; 381 382 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 383 timeperframe = parm->parm.capture.timeperframe; 384 else 385 timeperframe = parm->parm.output.timeperframe; 386 387 interval = uvc_fraction_to_interval(timeperframe.numerator, 388 timeperframe.denominator); 389 uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", 390 timeperframe.numerator, timeperframe.denominator, interval); 391 392 mutex_lock(&stream->mutex); 393 394 if (uvc_queue_streaming(&stream->queue)) { 395 mutex_unlock(&stream->mutex); 396 return -EBUSY; 397 } 398 399 probe = stream->ctrl; 400 probe.dwFrameInterval = 401 uvc_try_frame_interval(stream->cur_frame, interval); 402 403 /* Probe the device with the new settings. */ 404 ret = uvc_probe_video(stream, &probe); 405 if (ret < 0) { 406 mutex_unlock(&stream->mutex); 407 return ret; 408 } 409 410 stream->ctrl = probe; 411 mutex_unlock(&stream->mutex); 412 413 /* Return the actual frame period. */ 414 timeperframe.numerator = probe.dwFrameInterval; 415 timeperframe.denominator = 10000000; 416 uvc_simplify_fraction(&timeperframe.numerator, 417 &timeperframe.denominator, 8, 333); 418 419 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 420 parm->parm.capture.timeperframe = timeperframe; 421 else 422 parm->parm.output.timeperframe = timeperframe; 423 424 return 0; 425 } 426 427 /* ------------------------------------------------------------------------ 428 * Privilege management 429 */ 430 431 /* 432 * Privilege management is the multiple-open implementation basis. The current 433 * implementation is completely transparent for the end-user and doesn't 434 * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. 435 * Those ioctls enable finer control on the device (by making possible for a 436 * user to request exclusive access to a device), but are not mature yet. 437 * Switching to the V4L2 priority mechanism might be considered in the future 438 * if this situation changes. 439 * 440 * Each open instance of a UVC device can either be in a privileged or 441 * unprivileged state. Only a single instance can be in a privileged state at 442 * a given time. Trying to perform an operation that requires privileges will 443 * automatically acquire the required privileges if possible, or return -EBUSY 444 * otherwise. Privileges are dismissed when closing the instance or when 445 * freeing the video buffers using VIDIOC_REQBUFS. 446 * 447 * Operations that require privileges are: 448 * 449 * - VIDIOC_S_INPUT 450 * - VIDIOC_S_PARM 451 * - VIDIOC_S_FMT 452 * - VIDIOC_REQBUFS 453 */ 454 static int uvc_acquire_privileges(struct uvc_fh *handle) 455 { 456 /* Always succeed if the handle is already privileged. */ 457 if (handle->state == UVC_HANDLE_ACTIVE) 458 return 0; 459 460 /* Check if the device already has a privileged handle. */ 461 if (atomic_inc_return(&handle->stream->active) != 1) { 462 atomic_dec(&handle->stream->active); 463 return -EBUSY; 464 } 465 466 handle->state = UVC_HANDLE_ACTIVE; 467 return 0; 468 } 469 470 static void uvc_dismiss_privileges(struct uvc_fh *handle) 471 { 472 if (handle->state == UVC_HANDLE_ACTIVE) 473 atomic_dec(&handle->stream->active); 474 475 handle->state = UVC_HANDLE_PASSIVE; 476 } 477 478 static int uvc_has_privileges(struct uvc_fh *handle) 479 { 480 return handle->state == UVC_HANDLE_ACTIVE; 481 } 482 483 /* ------------------------------------------------------------------------ 484 * V4L2 file operations 485 */ 486 487 static int uvc_v4l2_open(struct file *file) 488 { 489 struct uvc_streaming *stream; 490 struct uvc_fh *handle; 491 int ret = 0; 492 493 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); 494 stream = video_drvdata(file); 495 496 ret = usb_autopm_get_interface(stream->dev->intf); 497 if (ret < 0) 498 return ret; 499 500 /* Create the device handle. */ 501 handle = kzalloc(sizeof *handle, GFP_KERNEL); 502 if (handle == NULL) { 503 usb_autopm_put_interface(stream->dev->intf); 504 return -ENOMEM; 505 } 506 507 mutex_lock(&stream->dev->lock); 508 if (stream->dev->users == 0) { 509 ret = uvc_status_start(stream->dev, GFP_KERNEL); 510 if (ret < 0) { 511 mutex_unlock(&stream->dev->lock); 512 usb_autopm_put_interface(stream->dev->intf); 513 kfree(handle); 514 return ret; 515 } 516 } 517 518 stream->dev->users++; 519 mutex_unlock(&stream->dev->lock); 520 521 v4l2_fh_init(&handle->vfh, &stream->vdev); 522 v4l2_fh_add(&handle->vfh); 523 handle->chain = stream->chain; 524 handle->stream = stream; 525 handle->state = UVC_HANDLE_PASSIVE; 526 file->private_data = handle; 527 528 return 0; 529 } 530 531 static int uvc_v4l2_release(struct file *file) 532 { 533 struct uvc_fh *handle = file->private_data; 534 struct uvc_streaming *stream = handle->stream; 535 536 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); 537 538 /* Only free resources if this is a privileged handle. */ 539 if (uvc_has_privileges(handle)) 540 uvc_queue_release(&stream->queue); 541 542 /* Release the file handle. */ 543 uvc_dismiss_privileges(handle); 544 v4l2_fh_del(&handle->vfh); 545 v4l2_fh_exit(&handle->vfh); 546 kfree(handle); 547 file->private_data = NULL; 548 549 mutex_lock(&stream->dev->lock); 550 if (--stream->dev->users == 0) 551 uvc_status_stop(stream->dev); 552 mutex_unlock(&stream->dev->lock); 553 554 usb_autopm_put_interface(stream->dev->intf); 555 return 0; 556 } 557 558 static int uvc_ioctl_querycap(struct file *file, void *fh, 559 struct v4l2_capability *cap) 560 { 561 struct video_device *vdev = video_devdata(file); 562 struct uvc_fh *handle = file->private_data; 563 struct uvc_video_chain *chain = handle->chain; 564 struct uvc_streaming *stream = handle->stream; 565 566 strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); 567 strlcpy(cap->card, vdev->name, sizeof(cap->card)); 568 usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); 569 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING 570 | chain->caps; 571 572 return 0; 573 } 574 575 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream, 576 struct v4l2_fmtdesc *fmt) 577 { 578 struct uvc_format *format; 579 enum v4l2_buf_type type = fmt->type; 580 __u32 index = fmt->index; 581 582 if (fmt->type != stream->type || fmt->index >= stream->nformats) 583 return -EINVAL; 584 585 memset(fmt, 0, sizeof(*fmt)); 586 fmt->index = index; 587 fmt->type = type; 588 589 format = &stream->format[fmt->index]; 590 fmt->flags = 0; 591 if (format->flags & UVC_FMT_FLAG_COMPRESSED) 592 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; 593 strlcpy(fmt->description, format->name, sizeof(fmt->description)); 594 fmt->description[sizeof(fmt->description) - 1] = 0; 595 fmt->pixelformat = format->fcc; 596 return 0; 597 } 598 599 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh, 600 struct v4l2_fmtdesc *fmt) 601 { 602 struct uvc_fh *handle = fh; 603 struct uvc_streaming *stream = handle->stream; 604 605 return uvc_ioctl_enum_fmt(stream, fmt); 606 } 607 608 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh, 609 struct v4l2_fmtdesc *fmt) 610 { 611 struct uvc_fh *handle = fh; 612 struct uvc_streaming *stream = handle->stream; 613 614 return uvc_ioctl_enum_fmt(stream, fmt); 615 } 616 617 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh, 618 struct v4l2_format *fmt) 619 { 620 struct uvc_fh *handle = fh; 621 struct uvc_streaming *stream = handle->stream; 622 623 return uvc_v4l2_get_format(stream, fmt); 624 } 625 626 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh, 627 struct v4l2_format *fmt) 628 { 629 struct uvc_fh *handle = fh; 630 struct uvc_streaming *stream = handle->stream; 631 632 return uvc_v4l2_get_format(stream, fmt); 633 } 634 635 static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh, 636 struct v4l2_format *fmt) 637 { 638 struct uvc_fh *handle = fh; 639 struct uvc_streaming *stream = handle->stream; 640 int ret; 641 642 ret = uvc_acquire_privileges(handle); 643 if (ret < 0) 644 return ret; 645 646 return uvc_v4l2_set_format(stream, fmt); 647 } 648 649 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh, 650 struct v4l2_format *fmt) 651 { 652 struct uvc_fh *handle = fh; 653 struct uvc_streaming *stream = handle->stream; 654 int ret; 655 656 ret = uvc_acquire_privileges(handle); 657 if (ret < 0) 658 return ret; 659 660 return uvc_v4l2_set_format(stream, fmt); 661 } 662 663 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh, 664 struct v4l2_format *fmt) 665 { 666 struct uvc_fh *handle = fh; 667 struct uvc_streaming *stream = handle->stream; 668 struct uvc_streaming_control probe; 669 670 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 671 } 672 673 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh, 674 struct v4l2_format *fmt) 675 { 676 struct uvc_fh *handle = fh; 677 struct uvc_streaming *stream = handle->stream; 678 struct uvc_streaming_control probe; 679 680 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 681 } 682 683 static int uvc_ioctl_reqbufs(struct file *file, void *fh, 684 struct v4l2_requestbuffers *rb) 685 { 686 struct uvc_fh *handle = fh; 687 struct uvc_streaming *stream = handle->stream; 688 int ret; 689 690 ret = uvc_acquire_privileges(handle); 691 if (ret < 0) 692 return ret; 693 694 mutex_lock(&stream->mutex); 695 ret = uvc_request_buffers(&stream->queue, rb); 696 mutex_unlock(&stream->mutex); 697 if (ret < 0) 698 return ret; 699 700 if (ret == 0) 701 uvc_dismiss_privileges(handle); 702 703 return 0; 704 } 705 706 static int uvc_ioctl_querybuf(struct file *file, void *fh, 707 struct v4l2_buffer *buf) 708 { 709 struct uvc_fh *handle = fh; 710 struct uvc_streaming *stream = handle->stream; 711 712 if (!uvc_has_privileges(handle)) 713 return -EBUSY; 714 715 return uvc_query_buffer(&stream->queue, buf); 716 } 717 718 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 719 { 720 struct uvc_fh *handle = fh; 721 struct uvc_streaming *stream = handle->stream; 722 723 if (!uvc_has_privileges(handle)) 724 return -EBUSY; 725 726 return uvc_queue_buffer(&stream->queue, buf); 727 } 728 729 static int uvc_ioctl_expbuf(struct file *file, void *fh, 730 struct v4l2_exportbuffer *exp) 731 { 732 struct uvc_fh *handle = fh; 733 struct uvc_streaming *stream = handle->stream; 734 735 if (!uvc_has_privileges(handle)) 736 return -EBUSY; 737 738 return uvc_export_buffer(&stream->queue, exp); 739 } 740 741 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 742 { 743 struct uvc_fh *handle = fh; 744 struct uvc_streaming *stream = handle->stream; 745 746 if (!uvc_has_privileges(handle)) 747 return -EBUSY; 748 749 return uvc_dequeue_buffer(&stream->queue, buf, 750 file->f_flags & O_NONBLOCK); 751 } 752 753 static int uvc_ioctl_create_bufs(struct file *file, void *fh, 754 struct v4l2_create_buffers *cb) 755 { 756 struct uvc_fh *handle = fh; 757 struct uvc_streaming *stream = handle->stream; 758 int ret; 759 760 ret = uvc_acquire_privileges(handle); 761 if (ret < 0) 762 return ret; 763 764 return uvc_create_buffers(&stream->queue, cb); 765 } 766 767 static int uvc_ioctl_streamon(struct file *file, void *fh, 768 enum v4l2_buf_type type) 769 { 770 struct uvc_fh *handle = fh; 771 struct uvc_streaming *stream = handle->stream; 772 int ret; 773 774 if (!uvc_has_privileges(handle)) 775 return -EBUSY; 776 777 mutex_lock(&stream->mutex); 778 ret = uvc_queue_streamon(&stream->queue, type); 779 mutex_unlock(&stream->mutex); 780 781 return ret; 782 } 783 784 static int uvc_ioctl_streamoff(struct file *file, void *fh, 785 enum v4l2_buf_type type) 786 { 787 struct uvc_fh *handle = fh; 788 struct uvc_streaming *stream = handle->stream; 789 790 if (!uvc_has_privileges(handle)) 791 return -EBUSY; 792 793 mutex_lock(&stream->mutex); 794 uvc_queue_streamoff(&stream->queue, type); 795 mutex_unlock(&stream->mutex); 796 797 return 0; 798 } 799 800 static int uvc_ioctl_enum_input(struct file *file, void *fh, 801 struct v4l2_input *input) 802 { 803 struct uvc_fh *handle = fh; 804 struct uvc_video_chain *chain = handle->chain; 805 const struct uvc_entity *selector = chain->selector; 806 struct uvc_entity *iterm = NULL; 807 u32 index = input->index; 808 int pin = 0; 809 810 if (selector == NULL || 811 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 812 if (index != 0) 813 return -EINVAL; 814 list_for_each_entry(iterm, &chain->entities, chain) { 815 if (UVC_ENTITY_IS_ITERM(iterm)) 816 break; 817 } 818 pin = iterm->id; 819 } else if (index < selector->bNrInPins) { 820 pin = selector->baSourceID[index]; 821 list_for_each_entry(iterm, &chain->entities, chain) { 822 if (!UVC_ENTITY_IS_ITERM(iterm)) 823 continue; 824 if (iterm->id == pin) 825 break; 826 } 827 } 828 829 if (iterm == NULL || iterm->id != pin) 830 return -EINVAL; 831 832 memset(input, 0, sizeof(*input)); 833 input->index = index; 834 strlcpy(input->name, iterm->name, sizeof(input->name)); 835 if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) 836 input->type = V4L2_INPUT_TYPE_CAMERA; 837 838 return 0; 839 } 840 841 static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input) 842 { 843 struct uvc_fh *handle = fh; 844 struct uvc_video_chain *chain = handle->chain; 845 int ret; 846 u8 i; 847 848 if (chain->selector == NULL || 849 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 850 *input = 0; 851 return 0; 852 } 853 854 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id, 855 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 856 &i, 1); 857 if (ret < 0) 858 return ret; 859 860 *input = i - 1; 861 return 0; 862 } 863 864 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input) 865 { 866 struct uvc_fh *handle = fh; 867 struct uvc_video_chain *chain = handle->chain; 868 int ret; 869 u32 i; 870 871 ret = uvc_acquire_privileges(handle); 872 if (ret < 0) 873 return ret; 874 875 if (chain->selector == NULL || 876 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 877 if (input) 878 return -EINVAL; 879 return 0; 880 } 881 882 if (input >= chain->selector->bNrInPins) 883 return -EINVAL; 884 885 i = input + 1; 886 return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id, 887 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 888 &i, 1); 889 } 890 891 static int uvc_ioctl_queryctrl(struct file *file, void *fh, 892 struct v4l2_queryctrl *qc) 893 { 894 struct uvc_fh *handle = fh; 895 struct uvc_video_chain *chain = handle->chain; 896 897 return uvc_query_v4l2_ctrl(chain, qc); 898 } 899 900 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh, 901 struct v4l2_query_ext_ctrl *qec) 902 { 903 struct uvc_fh *handle = fh; 904 struct uvc_video_chain *chain = handle->chain; 905 struct v4l2_queryctrl qc = { qec->id }; 906 int ret; 907 908 ret = uvc_query_v4l2_ctrl(chain, &qc); 909 if (ret) 910 return ret; 911 912 qec->id = qc.id; 913 qec->type = qc.type; 914 strlcpy(qec->name, qc.name, sizeof(qec->name)); 915 qec->minimum = qc.minimum; 916 qec->maximum = qc.maximum; 917 qec->step = qc.step; 918 qec->default_value = qc.default_value; 919 qec->flags = qc.flags; 920 qec->elem_size = 4; 921 qec->elems = 1; 922 qec->nr_of_dims = 0; 923 memset(qec->dims, 0, sizeof(qec->dims)); 924 memset(qec->reserved, 0, sizeof(qec->reserved)); 925 926 return 0; 927 } 928 929 static int uvc_ioctl_g_ctrl(struct file *file, void *fh, 930 struct v4l2_control *ctrl) 931 { 932 struct uvc_fh *handle = fh; 933 struct uvc_video_chain *chain = handle->chain; 934 struct v4l2_ext_control xctrl; 935 int ret; 936 937 memset(&xctrl, 0, sizeof(xctrl)); 938 xctrl.id = ctrl->id; 939 940 ret = uvc_ctrl_begin(chain); 941 if (ret < 0) 942 return ret; 943 944 ret = uvc_ctrl_get(chain, &xctrl); 945 uvc_ctrl_rollback(handle); 946 if (ret < 0) 947 return ret; 948 949 ctrl->value = xctrl.value; 950 return 0; 951 } 952 953 static int uvc_ioctl_s_ctrl(struct file *file, void *fh, 954 struct v4l2_control *ctrl) 955 { 956 struct uvc_fh *handle = fh; 957 struct uvc_video_chain *chain = handle->chain; 958 struct v4l2_ext_control xctrl; 959 int ret; 960 961 memset(&xctrl, 0, sizeof(xctrl)); 962 xctrl.id = ctrl->id; 963 xctrl.value = ctrl->value; 964 965 ret = uvc_ctrl_begin(chain); 966 if (ret < 0) 967 return ret; 968 969 ret = uvc_ctrl_set(chain, &xctrl); 970 if (ret < 0) { 971 uvc_ctrl_rollback(handle); 972 return ret; 973 } 974 975 ret = uvc_ctrl_commit(handle, &xctrl, 1); 976 if (ret < 0) 977 return ret; 978 979 ctrl->value = xctrl.value; 980 return 0; 981 } 982 983 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, 984 struct v4l2_ext_controls *ctrls) 985 { 986 struct uvc_fh *handle = fh; 987 struct uvc_video_chain *chain = handle->chain; 988 struct v4l2_ext_control *ctrl = ctrls->controls; 989 unsigned int i; 990 int ret; 991 992 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) { 993 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 994 struct v4l2_queryctrl qc = { .id = ctrl->id }; 995 996 ret = uvc_query_v4l2_ctrl(chain, &qc); 997 if (ret < 0) { 998 ctrls->error_idx = i; 999 return ret; 1000 } 1001 1002 ctrl->value = qc.default_value; 1003 } 1004 1005 return 0; 1006 } 1007 1008 ret = uvc_ctrl_begin(chain); 1009 if (ret < 0) 1010 return ret; 1011 1012 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1013 ret = uvc_ctrl_get(chain, ctrl); 1014 if (ret < 0) { 1015 uvc_ctrl_rollback(handle); 1016 ctrls->error_idx = i; 1017 return ret; 1018 } 1019 } 1020 1021 ctrls->error_idx = 0; 1022 1023 return uvc_ctrl_rollback(handle); 1024 } 1025 1026 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, 1027 struct v4l2_ext_controls *ctrls, 1028 bool commit) 1029 { 1030 struct v4l2_ext_control *ctrl = ctrls->controls; 1031 struct uvc_video_chain *chain = handle->chain; 1032 unsigned int i; 1033 int ret; 1034 1035 /* Default value cannot be changed */ 1036 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) 1037 return -EINVAL; 1038 1039 ret = uvc_ctrl_begin(chain); 1040 if (ret < 0) 1041 return ret; 1042 1043 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1044 ret = uvc_ctrl_set(chain, ctrl); 1045 if (ret < 0) { 1046 uvc_ctrl_rollback(handle); 1047 ctrls->error_idx = commit ? ctrls->count : i; 1048 return ret; 1049 } 1050 } 1051 1052 ctrls->error_idx = 0; 1053 1054 if (commit) 1055 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); 1056 else 1057 return uvc_ctrl_rollback(handle); 1058 } 1059 1060 static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh, 1061 struct v4l2_ext_controls *ctrls) 1062 { 1063 struct uvc_fh *handle = fh; 1064 1065 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true); 1066 } 1067 1068 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh, 1069 struct v4l2_ext_controls *ctrls) 1070 { 1071 struct uvc_fh *handle = fh; 1072 1073 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false); 1074 } 1075 1076 static int uvc_ioctl_querymenu(struct file *file, void *fh, 1077 struct v4l2_querymenu *qm) 1078 { 1079 struct uvc_fh *handle = fh; 1080 struct uvc_video_chain *chain = handle->chain; 1081 1082 return uvc_query_v4l2_menu(chain, qm); 1083 } 1084 1085 static int uvc_ioctl_g_selection(struct file *file, void *fh, 1086 struct v4l2_selection *sel) 1087 { 1088 struct uvc_fh *handle = fh; 1089 struct uvc_streaming *stream = handle->stream; 1090 1091 if (sel->type != stream->type) 1092 return -EINVAL; 1093 1094 switch (sel->target) { 1095 case V4L2_SEL_TGT_CROP_DEFAULT: 1096 case V4L2_SEL_TGT_CROP_BOUNDS: 1097 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1098 return -EINVAL; 1099 break; 1100 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 1101 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1102 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1103 return -EINVAL; 1104 break; 1105 default: 1106 return -EINVAL; 1107 } 1108 1109 sel->r.left = 0; 1110 sel->r.top = 0; 1111 mutex_lock(&stream->mutex); 1112 sel->r.width = stream->cur_frame->wWidth; 1113 sel->r.height = stream->cur_frame->wHeight; 1114 mutex_unlock(&stream->mutex); 1115 1116 return 0; 1117 } 1118 1119 static int uvc_ioctl_g_parm(struct file *file, void *fh, 1120 struct v4l2_streamparm *parm) 1121 { 1122 struct uvc_fh *handle = fh; 1123 struct uvc_streaming *stream = handle->stream; 1124 1125 return uvc_v4l2_get_streamparm(stream, parm); 1126 } 1127 1128 static int uvc_ioctl_s_parm(struct file *file, void *fh, 1129 struct v4l2_streamparm *parm) 1130 { 1131 struct uvc_fh *handle = fh; 1132 struct uvc_streaming *stream = handle->stream; 1133 int ret; 1134 1135 ret = uvc_acquire_privileges(handle); 1136 if (ret < 0) 1137 return ret; 1138 1139 return uvc_v4l2_set_streamparm(stream, parm); 1140 } 1141 1142 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh, 1143 struct v4l2_frmsizeenum *fsize) 1144 { 1145 struct uvc_fh *handle = fh; 1146 struct uvc_streaming *stream = handle->stream; 1147 struct uvc_format *format = NULL; 1148 struct uvc_frame *frame; 1149 int i; 1150 1151 /* Look for the given pixel format */ 1152 for (i = 0; i < stream->nformats; i++) { 1153 if (stream->format[i].fcc == fsize->pixel_format) { 1154 format = &stream->format[i]; 1155 break; 1156 } 1157 } 1158 if (format == NULL) 1159 return -EINVAL; 1160 1161 if (fsize->index >= format->nframes) 1162 return -EINVAL; 1163 1164 frame = &format->frame[fsize->index]; 1165 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1166 fsize->discrete.width = frame->wWidth; 1167 fsize->discrete.height = frame->wHeight; 1168 return 0; 1169 } 1170 1171 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, 1172 struct v4l2_frmivalenum *fival) 1173 { 1174 struct uvc_fh *handle = fh; 1175 struct uvc_streaming *stream = handle->stream; 1176 struct uvc_format *format = NULL; 1177 struct uvc_frame *frame = NULL; 1178 int i; 1179 1180 /* Look for the given pixel format and frame size */ 1181 for (i = 0; i < stream->nformats; i++) { 1182 if (stream->format[i].fcc == fival->pixel_format) { 1183 format = &stream->format[i]; 1184 break; 1185 } 1186 } 1187 if (format == NULL) 1188 return -EINVAL; 1189 1190 for (i = 0; i < format->nframes; i++) { 1191 if (format->frame[i].wWidth == fival->width && 1192 format->frame[i].wHeight == fival->height) { 1193 frame = &format->frame[i]; 1194 break; 1195 } 1196 } 1197 if (frame == NULL) 1198 return -EINVAL; 1199 1200 if (frame->bFrameIntervalType) { 1201 if (fival->index >= frame->bFrameIntervalType) 1202 return -EINVAL; 1203 1204 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1205 fival->discrete.numerator = 1206 frame->dwFrameInterval[fival->index]; 1207 fival->discrete.denominator = 10000000; 1208 uvc_simplify_fraction(&fival->discrete.numerator, 1209 &fival->discrete.denominator, 8, 333); 1210 } else { 1211 if (fival->index) 1212 return -EINVAL; 1213 1214 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; 1215 fival->stepwise.min.numerator = frame->dwFrameInterval[0]; 1216 fival->stepwise.min.denominator = 10000000; 1217 fival->stepwise.max.numerator = frame->dwFrameInterval[1]; 1218 fival->stepwise.max.denominator = 10000000; 1219 fival->stepwise.step.numerator = frame->dwFrameInterval[2]; 1220 fival->stepwise.step.denominator = 10000000; 1221 uvc_simplify_fraction(&fival->stepwise.min.numerator, 1222 &fival->stepwise.min.denominator, 8, 333); 1223 uvc_simplify_fraction(&fival->stepwise.max.numerator, 1224 &fival->stepwise.max.denominator, 8, 333); 1225 uvc_simplify_fraction(&fival->stepwise.step.numerator, 1226 &fival->stepwise.step.denominator, 8, 333); 1227 } 1228 1229 return 0; 1230 } 1231 1232 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh, 1233 const struct v4l2_event_subscription *sub) 1234 { 1235 switch (sub->type) { 1236 case V4L2_EVENT_CTRL: 1237 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops); 1238 default: 1239 return -EINVAL; 1240 } 1241 } 1242 1243 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio, 1244 unsigned int cmd, void *arg) 1245 { 1246 struct uvc_fh *handle = fh; 1247 struct uvc_video_chain *chain = handle->chain; 1248 1249 switch (cmd) { 1250 /* Dynamic controls. */ 1251 case UVCIOC_CTRL_MAP: 1252 return uvc_ioctl_ctrl_map(chain, arg); 1253 1254 case UVCIOC_CTRL_QUERY: 1255 return uvc_xu_ctrl_query(chain, arg); 1256 1257 default: 1258 return -ENOTTY; 1259 } 1260 } 1261 1262 #ifdef CONFIG_COMPAT 1263 struct uvc_xu_control_mapping32 { 1264 __u32 id; 1265 __u8 name[32]; 1266 __u8 entity[16]; 1267 __u8 selector; 1268 1269 __u8 size; 1270 __u8 offset; 1271 __u32 v4l2_type; 1272 __u32 data_type; 1273 1274 compat_caddr_t menu_info; 1275 __u32 menu_count; 1276 1277 __u32 reserved[4]; 1278 }; 1279 1280 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, 1281 const struct uvc_xu_control_mapping32 __user *up) 1282 { 1283 struct uvc_xu_control_mapping32 *p = (void *)kp; 1284 compat_caddr_t info; 1285 u32 count; 1286 1287 if (copy_from_user(p, up, sizeof(*p))) 1288 return -EFAULT; 1289 1290 count = p->menu_count; 1291 info = p->menu_info; 1292 1293 memset(kp->reserved, 0, sizeof(kp->reserved)); 1294 kp->menu_info = count ? compat_ptr(info) : NULL; 1295 kp->menu_count = count; 1296 return 0; 1297 } 1298 1299 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, 1300 struct uvc_xu_control_mapping32 __user *up) 1301 { 1302 if (copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) || 1303 put_user(kp->menu_count, &up->menu_count)) 1304 return -EFAULT; 1305 1306 if (clear_user(up->reserved, sizeof(up->reserved))) 1307 return -EFAULT; 1308 1309 return 0; 1310 } 1311 1312 struct uvc_xu_control_query32 { 1313 __u8 unit; 1314 __u8 selector; 1315 __u8 query; 1316 __u16 size; 1317 compat_caddr_t data; 1318 }; 1319 1320 static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp, 1321 const struct uvc_xu_control_query32 __user *up) 1322 { 1323 struct uvc_xu_control_query32 v; 1324 1325 if (copy_from_user(&v, up, sizeof(v))) 1326 return -EFAULT; 1327 1328 *kp = (struct uvc_xu_control_query){ 1329 .unit = v.unit, 1330 .selector = v.selector, 1331 .query = v.query, 1332 .size = v.size, 1333 .data = v.size ? compat_ptr(v.data) : NULL 1334 }; 1335 return 0; 1336 } 1337 1338 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, 1339 struct uvc_xu_control_query32 __user *up) 1340 { 1341 if (copy_to_user(up, kp, offsetof(typeof(*up), data))) 1342 return -EFAULT; 1343 return 0; 1344 } 1345 1346 #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) 1347 #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) 1348 1349 static long uvc_v4l2_compat_ioctl32(struct file *file, 1350 unsigned int cmd, unsigned long arg) 1351 { 1352 struct uvc_fh *handle = file->private_data; 1353 union { 1354 struct uvc_xu_control_mapping xmap; 1355 struct uvc_xu_control_query xqry; 1356 } karg; 1357 void __user *up = compat_ptr(arg); 1358 long ret; 1359 1360 switch (cmd) { 1361 case UVCIOC_CTRL_MAP32: 1362 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); 1363 if (ret) 1364 return ret; 1365 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap); 1366 if (ret) 1367 return ret; 1368 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); 1369 if (ret) 1370 return ret; 1371 1372 break; 1373 1374 case UVCIOC_CTRL_QUERY32: 1375 ret = uvc_v4l2_get_xu_query(&karg.xqry, up); 1376 if (ret) 1377 return ret; 1378 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry); 1379 if (ret) 1380 return ret; 1381 ret = uvc_v4l2_put_xu_query(&karg.xqry, up); 1382 if (ret) 1383 return ret; 1384 break; 1385 1386 default: 1387 return -ENOIOCTLCMD; 1388 } 1389 1390 return ret; 1391 } 1392 #endif 1393 1394 static ssize_t uvc_v4l2_read(struct file *file, char __user *data, 1395 size_t count, loff_t *ppos) 1396 { 1397 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); 1398 return -EINVAL; 1399 } 1400 1401 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) 1402 { 1403 struct uvc_fh *handle = file->private_data; 1404 struct uvc_streaming *stream = handle->stream; 1405 1406 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); 1407 1408 return uvc_queue_mmap(&stream->queue, vma); 1409 } 1410 1411 static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait) 1412 { 1413 struct uvc_fh *handle = file->private_data; 1414 struct uvc_streaming *stream = handle->stream; 1415 1416 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); 1417 1418 return uvc_queue_poll(&stream->queue, file, wait); 1419 } 1420 1421 #ifndef CONFIG_MMU 1422 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, 1423 unsigned long addr, unsigned long len, unsigned long pgoff, 1424 unsigned long flags) 1425 { 1426 struct uvc_fh *handle = file->private_data; 1427 struct uvc_streaming *stream = handle->stream; 1428 1429 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); 1430 1431 return uvc_queue_get_unmapped_area(&stream->queue, pgoff); 1432 } 1433 #endif 1434 1435 const struct v4l2_ioctl_ops uvc_ioctl_ops = { 1436 .vidioc_querycap = uvc_ioctl_querycap, 1437 .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap, 1438 .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out, 1439 .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap, 1440 .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out, 1441 .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap, 1442 .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out, 1443 .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap, 1444 .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out, 1445 .vidioc_reqbufs = uvc_ioctl_reqbufs, 1446 .vidioc_querybuf = uvc_ioctl_querybuf, 1447 .vidioc_qbuf = uvc_ioctl_qbuf, 1448 .vidioc_expbuf = uvc_ioctl_expbuf, 1449 .vidioc_dqbuf = uvc_ioctl_dqbuf, 1450 .vidioc_create_bufs = uvc_ioctl_create_bufs, 1451 .vidioc_streamon = uvc_ioctl_streamon, 1452 .vidioc_streamoff = uvc_ioctl_streamoff, 1453 .vidioc_enum_input = uvc_ioctl_enum_input, 1454 .vidioc_g_input = uvc_ioctl_g_input, 1455 .vidioc_s_input = uvc_ioctl_s_input, 1456 .vidioc_queryctrl = uvc_ioctl_queryctrl, 1457 .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl, 1458 .vidioc_g_ctrl = uvc_ioctl_g_ctrl, 1459 .vidioc_s_ctrl = uvc_ioctl_s_ctrl, 1460 .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls, 1461 .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls, 1462 .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls, 1463 .vidioc_querymenu = uvc_ioctl_querymenu, 1464 .vidioc_g_selection = uvc_ioctl_g_selection, 1465 .vidioc_g_parm = uvc_ioctl_g_parm, 1466 .vidioc_s_parm = uvc_ioctl_s_parm, 1467 .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes, 1468 .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals, 1469 .vidioc_subscribe_event = uvc_ioctl_subscribe_event, 1470 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1471 .vidioc_default = uvc_ioctl_default, 1472 }; 1473 1474 const struct v4l2_file_operations uvc_fops = { 1475 .owner = THIS_MODULE, 1476 .open = uvc_v4l2_open, 1477 .release = uvc_v4l2_release, 1478 .unlocked_ioctl = video_ioctl2, 1479 #ifdef CONFIG_COMPAT 1480 .compat_ioctl32 = uvc_v4l2_compat_ioctl32, 1481 #endif 1482 .read = uvc_v4l2_read, 1483 .mmap = uvc_v4l2_mmap, 1484 .poll = uvc_v4l2_poll, 1485 #ifndef CONFIG_MMU 1486 .get_unmapped_area = uvc_v4l2_get_unmapped_area, 1487 #endif 1488 }; 1489 1490