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 done; 70 } 71 72 size = xmap->menu_count * sizeof(*map->menu_info); 73 map->menu_info = kmalloc(size, GFP_KERNEL); 74 if (map->menu_info == NULL) { 75 ret = -ENOMEM; 76 goto done; 77 } 78 79 if (copy_from_user(map->menu_info, xmap->menu_info, size)) { 80 ret = -EFAULT; 81 goto done; 82 } 83 84 map->menu_count = xmap->menu_count; 85 break; 86 87 default: 88 uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type " 89 "%u.\n", xmap->v4l2_type); 90 ret = -ENOTTY; 91 goto done; 92 } 93 94 ret = uvc_ctrl_add_mapping(chain, map); 95 96 done: 97 kfree(map->menu_info); 98 kfree(map); 99 100 return ret; 101 } 102 103 /* ------------------------------------------------------------------------ 104 * V4L2 interface 105 */ 106 107 /* 108 * Find the frame interval closest to the requested frame interval for the 109 * given frame format and size. This should be done by the device as part of 110 * the Video Probe and Commit negotiation, but some hardware don't implement 111 * that feature. 112 */ 113 static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) 114 { 115 unsigned int i; 116 117 if (frame->bFrameIntervalType) { 118 __u32 best = -1, dist; 119 120 for (i = 0; i < frame->bFrameIntervalType; ++i) { 121 dist = interval > frame->dwFrameInterval[i] 122 ? interval - frame->dwFrameInterval[i] 123 : frame->dwFrameInterval[i] - interval; 124 125 if (dist > best) 126 break; 127 128 best = dist; 129 } 130 131 interval = frame->dwFrameInterval[i-1]; 132 } else { 133 const __u32 min = frame->dwFrameInterval[0]; 134 const __u32 max = frame->dwFrameInterval[1]; 135 const __u32 step = frame->dwFrameInterval[2]; 136 137 interval = min + (interval - min + step/2) / step * step; 138 if (interval > max) 139 interval = max; 140 } 141 142 return interval; 143 } 144 145 static int uvc_v4l2_try_format(struct uvc_streaming *stream, 146 struct v4l2_format *fmt, struct uvc_streaming_control *probe, 147 struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) 148 { 149 struct uvc_format *format = NULL; 150 struct uvc_frame *frame = NULL; 151 __u16 rw, rh; 152 unsigned int d, maxd; 153 unsigned int i; 154 __u32 interval; 155 int ret = 0; 156 __u8 *fcc; 157 158 if (fmt->type != stream->type) 159 return -EINVAL; 160 161 fcc = (__u8 *)&fmt->fmt.pix.pixelformat; 162 uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", 163 fmt->fmt.pix.pixelformat, 164 fcc[0], fcc[1], fcc[2], fcc[3], 165 fmt->fmt.pix.width, fmt->fmt.pix.height); 166 167 /* Check if the hardware supports the requested format, use the default 168 * format otherwise. 169 */ 170 for (i = 0; i < stream->nformats; ++i) { 171 format = &stream->format[i]; 172 if (format->fcc == fmt->fmt.pix.pixelformat) 173 break; 174 } 175 176 if (i == stream->nformats) { 177 format = stream->def_format; 178 fmt->fmt.pix.pixelformat = format->fcc; 179 } 180 181 /* Find the closest image size. The distance between image sizes is 182 * the size in pixels of the non-overlapping regions between the 183 * requested size and the frame-specified size. 184 */ 185 rw = fmt->fmt.pix.width; 186 rh = fmt->fmt.pix.height; 187 maxd = (unsigned int)-1; 188 189 for (i = 0; i < format->nframes; ++i) { 190 __u16 w = format->frame[i].wWidth; 191 __u16 h = format->frame[i].wHeight; 192 193 d = min(w, rw) * min(h, rh); 194 d = w*h + rw*rh - 2*d; 195 if (d < maxd) { 196 maxd = d; 197 frame = &format->frame[i]; 198 } 199 200 if (maxd == 0) 201 break; 202 } 203 204 if (frame == NULL) { 205 uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", 206 fmt->fmt.pix.width, fmt->fmt.pix.height); 207 return -EINVAL; 208 } 209 210 /* Use the default frame interval. */ 211 interval = frame->dwDefaultFrameInterval; 212 uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " 213 "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, 214 (100000000/interval)%10); 215 216 /* Set the format index, frame index and frame interval. */ 217 memset(probe, 0, sizeof *probe); 218 probe->bmHint = 1; /* dwFrameInterval */ 219 probe->bFormatIndex = format->index; 220 probe->bFrameIndex = frame->bFrameIndex; 221 probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); 222 /* Some webcams stall the probe control set request when the 223 * dwMaxVideoFrameSize field is set to zero. The UVC specification 224 * clearly states that the field is read-only from the host, so this 225 * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by 226 * the webcam to work around the problem. 227 * 228 * The workaround could probably be enabled for all webcams, so the 229 * quirk can be removed if needed. It's currently useful to detect 230 * webcam bugs and fix them before they hit the market (providing 231 * developers test their webcams with the Linux driver as well as with 232 * the Windows driver). 233 */ 234 mutex_lock(&stream->mutex); 235 if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) 236 probe->dwMaxVideoFrameSize = 237 stream->ctrl.dwMaxVideoFrameSize; 238 239 /* Probe the device. */ 240 ret = uvc_probe_video(stream, probe); 241 mutex_unlock(&stream->mutex); 242 if (ret < 0) 243 goto done; 244 245 fmt->fmt.pix.width = frame->wWidth; 246 fmt->fmt.pix.height = frame->wHeight; 247 fmt->fmt.pix.field = V4L2_FIELD_NONE; 248 fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; 249 fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; 250 fmt->fmt.pix.colorspace = format->colorspace; 251 fmt->fmt.pix.priv = 0; 252 253 if (uvc_format != NULL) 254 *uvc_format = format; 255 if (uvc_frame != NULL) 256 *uvc_frame = frame; 257 258 done: 259 return ret; 260 } 261 262 static int uvc_v4l2_get_format(struct uvc_streaming *stream, 263 struct v4l2_format *fmt) 264 { 265 struct uvc_format *format; 266 struct uvc_frame *frame; 267 int ret = 0; 268 269 if (fmt->type != stream->type) 270 return -EINVAL; 271 272 mutex_lock(&stream->mutex); 273 format = stream->cur_format; 274 frame = stream->cur_frame; 275 276 if (format == NULL || frame == NULL) { 277 ret = -EINVAL; 278 goto done; 279 } 280 281 fmt->fmt.pix.pixelformat = format->fcc; 282 fmt->fmt.pix.width = frame->wWidth; 283 fmt->fmt.pix.height = frame->wHeight; 284 fmt->fmt.pix.field = V4L2_FIELD_NONE; 285 fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; 286 fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; 287 fmt->fmt.pix.colorspace = format->colorspace; 288 fmt->fmt.pix.priv = 0; 289 290 done: 291 mutex_unlock(&stream->mutex); 292 return ret; 293 } 294 295 static int uvc_v4l2_set_format(struct uvc_streaming *stream, 296 struct v4l2_format *fmt) 297 { 298 struct uvc_streaming_control probe; 299 struct uvc_format *format; 300 struct uvc_frame *frame; 301 int ret; 302 303 if (fmt->type != stream->type) 304 return -EINVAL; 305 306 ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); 307 if (ret < 0) 308 return ret; 309 310 mutex_lock(&stream->mutex); 311 312 if (uvc_queue_allocated(&stream->queue)) { 313 ret = -EBUSY; 314 goto done; 315 } 316 317 stream->ctrl = probe; 318 stream->cur_format = format; 319 stream->cur_frame = frame; 320 321 done: 322 mutex_unlock(&stream->mutex); 323 return ret; 324 } 325 326 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, 327 struct v4l2_streamparm *parm) 328 { 329 uint32_t numerator, denominator; 330 331 if (parm->type != stream->type) 332 return -EINVAL; 333 334 mutex_lock(&stream->mutex); 335 numerator = stream->ctrl.dwFrameInterval; 336 mutex_unlock(&stream->mutex); 337 338 denominator = 10000000; 339 uvc_simplify_fraction(&numerator, &denominator, 8, 333); 340 341 memset(parm, 0, sizeof *parm); 342 parm->type = stream->type; 343 344 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { 345 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 346 parm->parm.capture.capturemode = 0; 347 parm->parm.capture.timeperframe.numerator = numerator; 348 parm->parm.capture.timeperframe.denominator = denominator; 349 parm->parm.capture.extendedmode = 0; 350 parm->parm.capture.readbuffers = 0; 351 } else { 352 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME; 353 parm->parm.output.outputmode = 0; 354 parm->parm.output.timeperframe.numerator = numerator; 355 parm->parm.output.timeperframe.denominator = denominator; 356 } 357 358 return 0; 359 } 360 361 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, 362 struct v4l2_streamparm *parm) 363 { 364 struct uvc_streaming_control probe; 365 struct v4l2_fract timeperframe; 366 uint32_t interval; 367 int ret; 368 369 if (parm->type != stream->type) 370 return -EINVAL; 371 372 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 373 timeperframe = parm->parm.capture.timeperframe; 374 else 375 timeperframe = parm->parm.output.timeperframe; 376 377 interval = uvc_fraction_to_interval(timeperframe.numerator, 378 timeperframe.denominator); 379 uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", 380 timeperframe.numerator, timeperframe.denominator, interval); 381 382 mutex_lock(&stream->mutex); 383 384 if (uvc_queue_streaming(&stream->queue)) { 385 mutex_unlock(&stream->mutex); 386 return -EBUSY; 387 } 388 389 probe = stream->ctrl; 390 probe.dwFrameInterval = 391 uvc_try_frame_interval(stream->cur_frame, interval); 392 393 /* Probe the device with the new settings. */ 394 ret = uvc_probe_video(stream, &probe); 395 if (ret < 0) { 396 mutex_unlock(&stream->mutex); 397 return ret; 398 } 399 400 stream->ctrl = probe; 401 mutex_unlock(&stream->mutex); 402 403 /* Return the actual frame period. */ 404 timeperframe.numerator = probe.dwFrameInterval; 405 timeperframe.denominator = 10000000; 406 uvc_simplify_fraction(&timeperframe.numerator, 407 &timeperframe.denominator, 8, 333); 408 409 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 410 parm->parm.capture.timeperframe = timeperframe; 411 else 412 parm->parm.output.timeperframe = timeperframe; 413 414 return 0; 415 } 416 417 /* ------------------------------------------------------------------------ 418 * Privilege management 419 */ 420 421 /* 422 * Privilege management is the multiple-open implementation basis. The current 423 * implementation is completely transparent for the end-user and doesn't 424 * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. 425 * Those ioctls enable finer control on the device (by making possible for a 426 * user to request exclusive access to a device), but are not mature yet. 427 * Switching to the V4L2 priority mechanism might be considered in the future 428 * if this situation changes. 429 * 430 * Each open instance of a UVC device can either be in a privileged or 431 * unprivileged state. Only a single instance can be in a privileged state at 432 * a given time. Trying to perform an operation that requires privileges will 433 * automatically acquire the required privileges if possible, or return -EBUSY 434 * otherwise. Privileges are dismissed when closing the instance or when 435 * freeing the video buffers using VIDIOC_REQBUFS. 436 * 437 * Operations that require privileges are: 438 * 439 * - VIDIOC_S_INPUT 440 * - VIDIOC_S_PARM 441 * - VIDIOC_S_FMT 442 * - VIDIOC_REQBUFS 443 */ 444 static int uvc_acquire_privileges(struct uvc_fh *handle) 445 { 446 /* Always succeed if the handle is already privileged. */ 447 if (handle->state == UVC_HANDLE_ACTIVE) 448 return 0; 449 450 /* Check if the device already has a privileged handle. */ 451 if (atomic_inc_return(&handle->stream->active) != 1) { 452 atomic_dec(&handle->stream->active); 453 return -EBUSY; 454 } 455 456 handle->state = UVC_HANDLE_ACTIVE; 457 return 0; 458 } 459 460 static void uvc_dismiss_privileges(struct uvc_fh *handle) 461 { 462 if (handle->state == UVC_HANDLE_ACTIVE) 463 atomic_dec(&handle->stream->active); 464 465 handle->state = UVC_HANDLE_PASSIVE; 466 } 467 468 static int uvc_has_privileges(struct uvc_fh *handle) 469 { 470 return handle->state == UVC_HANDLE_ACTIVE; 471 } 472 473 /* ------------------------------------------------------------------------ 474 * V4L2 file operations 475 */ 476 477 static int uvc_v4l2_open(struct file *file) 478 { 479 struct uvc_streaming *stream; 480 struct uvc_fh *handle; 481 int ret = 0; 482 483 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); 484 stream = video_drvdata(file); 485 486 ret = usb_autopm_get_interface(stream->dev->intf); 487 if (ret < 0) 488 return ret; 489 490 /* Create the device handle. */ 491 handle = kzalloc(sizeof *handle, GFP_KERNEL); 492 if (handle == NULL) { 493 usb_autopm_put_interface(stream->dev->intf); 494 return -ENOMEM; 495 } 496 497 mutex_lock(&stream->dev->lock); 498 if (stream->dev->users == 0) { 499 ret = uvc_status_start(stream->dev, GFP_KERNEL); 500 if (ret < 0) { 501 mutex_unlock(&stream->dev->lock); 502 usb_autopm_put_interface(stream->dev->intf); 503 kfree(handle); 504 return ret; 505 } 506 } 507 508 stream->dev->users++; 509 mutex_unlock(&stream->dev->lock); 510 511 v4l2_fh_init(&handle->vfh, &stream->vdev); 512 v4l2_fh_add(&handle->vfh); 513 handle->chain = stream->chain; 514 handle->stream = stream; 515 handle->state = UVC_HANDLE_PASSIVE; 516 file->private_data = handle; 517 518 return 0; 519 } 520 521 static int uvc_v4l2_release(struct file *file) 522 { 523 struct uvc_fh *handle = file->private_data; 524 struct uvc_streaming *stream = handle->stream; 525 526 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); 527 528 /* Only free resources if this is a privileged handle. */ 529 if (uvc_has_privileges(handle)) 530 uvc_queue_release(&stream->queue); 531 532 /* Release the file handle. */ 533 uvc_dismiss_privileges(handle); 534 v4l2_fh_del(&handle->vfh); 535 v4l2_fh_exit(&handle->vfh); 536 kfree(handle); 537 file->private_data = NULL; 538 539 mutex_lock(&stream->dev->lock); 540 if (--stream->dev->users == 0) 541 uvc_status_stop(stream->dev); 542 mutex_unlock(&stream->dev->lock); 543 544 usb_autopm_put_interface(stream->dev->intf); 545 return 0; 546 } 547 548 static int uvc_ioctl_querycap(struct file *file, void *fh, 549 struct v4l2_capability *cap) 550 { 551 struct video_device *vdev = video_devdata(file); 552 struct uvc_fh *handle = file->private_data; 553 struct uvc_video_chain *chain = handle->chain; 554 struct uvc_streaming *stream = handle->stream; 555 556 strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); 557 strlcpy(cap->card, vdev->name, sizeof(cap->card)); 558 usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); 559 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING 560 | chain->caps; 561 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 562 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 563 else 564 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 565 566 return 0; 567 } 568 569 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream, 570 struct v4l2_fmtdesc *fmt) 571 { 572 struct uvc_format *format; 573 enum v4l2_buf_type type = fmt->type; 574 __u32 index = fmt->index; 575 576 if (fmt->type != stream->type || fmt->index >= stream->nformats) 577 return -EINVAL; 578 579 memset(fmt, 0, sizeof(*fmt)); 580 fmt->index = index; 581 fmt->type = type; 582 583 format = &stream->format[fmt->index]; 584 fmt->flags = 0; 585 if (format->flags & UVC_FMT_FLAG_COMPRESSED) 586 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; 587 strlcpy(fmt->description, format->name, sizeof(fmt->description)); 588 fmt->description[sizeof(fmt->description) - 1] = 0; 589 fmt->pixelformat = format->fcc; 590 return 0; 591 } 592 593 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh, 594 struct v4l2_fmtdesc *fmt) 595 { 596 struct uvc_fh *handle = fh; 597 struct uvc_streaming *stream = handle->stream; 598 599 return uvc_ioctl_enum_fmt(stream, fmt); 600 } 601 602 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh, 603 struct v4l2_fmtdesc *fmt) 604 { 605 struct uvc_fh *handle = fh; 606 struct uvc_streaming *stream = handle->stream; 607 608 return uvc_ioctl_enum_fmt(stream, fmt); 609 } 610 611 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh, 612 struct v4l2_format *fmt) 613 { 614 struct uvc_fh *handle = fh; 615 struct uvc_streaming *stream = handle->stream; 616 617 return uvc_v4l2_get_format(stream, fmt); 618 } 619 620 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh, 621 struct v4l2_format *fmt) 622 { 623 struct uvc_fh *handle = fh; 624 struct uvc_streaming *stream = handle->stream; 625 626 return uvc_v4l2_get_format(stream, fmt); 627 } 628 629 static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh, 630 struct v4l2_format *fmt) 631 { 632 struct uvc_fh *handle = fh; 633 struct uvc_streaming *stream = handle->stream; 634 int ret; 635 636 ret = uvc_acquire_privileges(handle); 637 if (ret < 0) 638 return ret; 639 640 return uvc_v4l2_set_format(stream, fmt); 641 } 642 643 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh, 644 struct v4l2_format *fmt) 645 { 646 struct uvc_fh *handle = fh; 647 struct uvc_streaming *stream = handle->stream; 648 int ret; 649 650 ret = uvc_acquire_privileges(handle); 651 if (ret < 0) 652 return ret; 653 654 return uvc_v4l2_set_format(stream, fmt); 655 } 656 657 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh, 658 struct v4l2_format *fmt) 659 { 660 struct uvc_fh *handle = fh; 661 struct uvc_streaming *stream = handle->stream; 662 struct uvc_streaming_control probe; 663 664 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 665 } 666 667 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh, 668 struct v4l2_format *fmt) 669 { 670 struct uvc_fh *handle = fh; 671 struct uvc_streaming *stream = handle->stream; 672 struct uvc_streaming_control probe; 673 674 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 675 } 676 677 static int uvc_ioctl_reqbufs(struct file *file, void *fh, 678 struct v4l2_requestbuffers *rb) 679 { 680 struct uvc_fh *handle = fh; 681 struct uvc_streaming *stream = handle->stream; 682 int ret; 683 684 ret = uvc_acquire_privileges(handle); 685 if (ret < 0) 686 return ret; 687 688 mutex_lock(&stream->mutex); 689 ret = uvc_request_buffers(&stream->queue, rb); 690 mutex_unlock(&stream->mutex); 691 if (ret < 0) 692 return ret; 693 694 if (ret == 0) 695 uvc_dismiss_privileges(handle); 696 697 return 0; 698 } 699 700 static int uvc_ioctl_querybuf(struct file *file, void *fh, 701 struct v4l2_buffer *buf) 702 { 703 struct uvc_fh *handle = fh; 704 struct uvc_streaming *stream = handle->stream; 705 706 if (!uvc_has_privileges(handle)) 707 return -EBUSY; 708 709 return uvc_query_buffer(&stream->queue, buf); 710 } 711 712 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 713 { 714 struct uvc_fh *handle = fh; 715 struct uvc_streaming *stream = handle->stream; 716 717 if (!uvc_has_privileges(handle)) 718 return -EBUSY; 719 720 return uvc_queue_buffer(&stream->queue, buf); 721 } 722 723 static int uvc_ioctl_expbuf(struct file *file, void *fh, 724 struct v4l2_exportbuffer *exp) 725 { 726 struct uvc_fh *handle = fh; 727 struct uvc_streaming *stream = handle->stream; 728 729 if (!uvc_has_privileges(handle)) 730 return -EBUSY; 731 732 return uvc_export_buffer(&stream->queue, exp); 733 } 734 735 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 736 { 737 struct uvc_fh *handle = fh; 738 struct uvc_streaming *stream = handle->stream; 739 740 if (!uvc_has_privileges(handle)) 741 return -EBUSY; 742 743 return uvc_dequeue_buffer(&stream->queue, buf, 744 file->f_flags & O_NONBLOCK); 745 } 746 747 static int uvc_ioctl_create_bufs(struct file *file, void *fh, 748 struct v4l2_create_buffers *cb) 749 { 750 struct uvc_fh *handle = fh; 751 struct uvc_streaming *stream = handle->stream; 752 int ret; 753 754 ret = uvc_acquire_privileges(handle); 755 if (ret < 0) 756 return ret; 757 758 return uvc_create_buffers(&stream->queue, cb); 759 } 760 761 static int uvc_ioctl_streamon(struct file *file, void *fh, 762 enum v4l2_buf_type type) 763 { 764 struct uvc_fh *handle = fh; 765 struct uvc_streaming *stream = handle->stream; 766 int ret; 767 768 if (!uvc_has_privileges(handle)) 769 return -EBUSY; 770 771 mutex_lock(&stream->mutex); 772 ret = uvc_queue_streamon(&stream->queue, type); 773 mutex_unlock(&stream->mutex); 774 775 return ret; 776 } 777 778 static int uvc_ioctl_streamoff(struct file *file, void *fh, 779 enum v4l2_buf_type type) 780 { 781 struct uvc_fh *handle = fh; 782 struct uvc_streaming *stream = handle->stream; 783 784 if (!uvc_has_privileges(handle)) 785 return -EBUSY; 786 787 mutex_lock(&stream->mutex); 788 uvc_queue_streamoff(&stream->queue, type); 789 mutex_unlock(&stream->mutex); 790 791 return 0; 792 } 793 794 static int uvc_ioctl_enum_input(struct file *file, void *fh, 795 struct v4l2_input *input) 796 { 797 struct uvc_fh *handle = fh; 798 struct uvc_video_chain *chain = handle->chain; 799 const struct uvc_entity *selector = chain->selector; 800 struct uvc_entity *iterm = NULL; 801 u32 index = input->index; 802 int pin = 0; 803 804 if (selector == NULL || 805 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 806 if (index != 0) 807 return -EINVAL; 808 list_for_each_entry(iterm, &chain->entities, chain) { 809 if (UVC_ENTITY_IS_ITERM(iterm)) 810 break; 811 } 812 pin = iterm->id; 813 } else if (index < selector->bNrInPins) { 814 pin = selector->baSourceID[index]; 815 list_for_each_entry(iterm, &chain->entities, chain) { 816 if (!UVC_ENTITY_IS_ITERM(iterm)) 817 continue; 818 if (iterm->id == pin) 819 break; 820 } 821 } 822 823 if (iterm == NULL || iterm->id != pin) 824 return -EINVAL; 825 826 memset(input, 0, sizeof(*input)); 827 input->index = index; 828 strlcpy(input->name, iterm->name, sizeof(input->name)); 829 if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) 830 input->type = V4L2_INPUT_TYPE_CAMERA; 831 832 return 0; 833 } 834 835 static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input) 836 { 837 struct uvc_fh *handle = fh; 838 struct uvc_video_chain *chain = handle->chain; 839 int ret; 840 u8 i; 841 842 if (chain->selector == NULL || 843 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 844 *input = 0; 845 return 0; 846 } 847 848 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id, 849 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 850 &i, 1); 851 if (ret < 0) 852 return ret; 853 854 *input = i - 1; 855 return 0; 856 } 857 858 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input) 859 { 860 struct uvc_fh *handle = fh; 861 struct uvc_video_chain *chain = handle->chain; 862 int ret; 863 u32 i; 864 865 ret = uvc_acquire_privileges(handle); 866 if (ret < 0) 867 return ret; 868 869 if (chain->selector == NULL || 870 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 871 if (input) 872 return -EINVAL; 873 return 0; 874 } 875 876 if (input >= chain->selector->bNrInPins) 877 return -EINVAL; 878 879 i = input + 1; 880 return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id, 881 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 882 &i, 1); 883 } 884 885 static int uvc_ioctl_queryctrl(struct file *file, void *fh, 886 struct v4l2_queryctrl *qc) 887 { 888 struct uvc_fh *handle = fh; 889 struct uvc_video_chain *chain = handle->chain; 890 891 return uvc_query_v4l2_ctrl(chain, qc); 892 } 893 894 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh, 895 struct v4l2_query_ext_ctrl *qec) 896 { 897 struct uvc_fh *handle = fh; 898 struct uvc_video_chain *chain = handle->chain; 899 struct v4l2_queryctrl qc = { qec->id }; 900 int ret; 901 902 ret = uvc_query_v4l2_ctrl(chain, &qc); 903 if (ret) 904 return ret; 905 906 qec->id = qc.id; 907 qec->type = qc.type; 908 strlcpy(qec->name, qc.name, sizeof(qec->name)); 909 qec->minimum = qc.minimum; 910 qec->maximum = qc.maximum; 911 qec->step = qc.step; 912 qec->default_value = qc.default_value; 913 qec->flags = qc.flags; 914 qec->elem_size = 4; 915 qec->elems = 1; 916 qec->nr_of_dims = 0; 917 memset(qec->dims, 0, sizeof(qec->dims)); 918 memset(qec->reserved, 0, sizeof(qec->reserved)); 919 920 return 0; 921 } 922 923 static int uvc_ioctl_g_ctrl(struct file *file, void *fh, 924 struct v4l2_control *ctrl) 925 { 926 struct uvc_fh *handle = fh; 927 struct uvc_video_chain *chain = handle->chain; 928 struct v4l2_ext_control xctrl; 929 int ret; 930 931 memset(&xctrl, 0, sizeof(xctrl)); 932 xctrl.id = ctrl->id; 933 934 ret = uvc_ctrl_begin(chain); 935 if (ret < 0) 936 return ret; 937 938 ret = uvc_ctrl_get(chain, &xctrl); 939 uvc_ctrl_rollback(handle); 940 if (ret < 0) 941 return ret; 942 943 ctrl->value = xctrl.value; 944 return 0; 945 } 946 947 static int uvc_ioctl_s_ctrl(struct file *file, void *fh, 948 struct v4l2_control *ctrl) 949 { 950 struct uvc_fh *handle = fh; 951 struct uvc_video_chain *chain = handle->chain; 952 struct v4l2_ext_control xctrl; 953 int ret; 954 955 memset(&xctrl, 0, sizeof(xctrl)); 956 xctrl.id = ctrl->id; 957 xctrl.value = ctrl->value; 958 959 ret = uvc_ctrl_begin(chain); 960 if (ret < 0) 961 return ret; 962 963 ret = uvc_ctrl_set(chain, &xctrl); 964 if (ret < 0) { 965 uvc_ctrl_rollback(handle); 966 return ret; 967 } 968 969 ret = uvc_ctrl_commit(handle, &xctrl, 1); 970 if (ret < 0) 971 return ret; 972 973 ctrl->value = xctrl.value; 974 return 0; 975 } 976 977 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, 978 struct v4l2_ext_controls *ctrls) 979 { 980 struct uvc_fh *handle = fh; 981 struct uvc_video_chain *chain = handle->chain; 982 struct v4l2_ext_control *ctrl = ctrls->controls; 983 unsigned int i; 984 int ret; 985 986 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) { 987 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 988 struct v4l2_queryctrl qc = { .id = ctrl->id }; 989 990 ret = uvc_query_v4l2_ctrl(chain, &qc); 991 if (ret < 0) { 992 ctrls->error_idx = i; 993 return ret; 994 } 995 996 ctrl->value = qc.default_value; 997 } 998 999 return 0; 1000 } 1001 1002 ret = uvc_ctrl_begin(chain); 1003 if (ret < 0) 1004 return ret; 1005 1006 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1007 ret = uvc_ctrl_get(chain, ctrl); 1008 if (ret < 0) { 1009 uvc_ctrl_rollback(handle); 1010 ctrls->error_idx = i; 1011 return ret; 1012 } 1013 } 1014 1015 ctrls->error_idx = 0; 1016 1017 return uvc_ctrl_rollback(handle); 1018 } 1019 1020 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, 1021 struct v4l2_ext_controls *ctrls, 1022 bool commit) 1023 { 1024 struct v4l2_ext_control *ctrl = ctrls->controls; 1025 struct uvc_video_chain *chain = handle->chain; 1026 unsigned int i; 1027 int ret; 1028 1029 /* Default value cannot be changed */ 1030 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) 1031 return -EINVAL; 1032 1033 ret = uvc_ctrl_begin(chain); 1034 if (ret < 0) 1035 return ret; 1036 1037 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1038 ret = uvc_ctrl_set(chain, ctrl); 1039 if (ret < 0) { 1040 uvc_ctrl_rollback(handle); 1041 ctrls->error_idx = commit ? ctrls->count : i; 1042 return ret; 1043 } 1044 } 1045 1046 ctrls->error_idx = 0; 1047 1048 if (commit) 1049 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); 1050 else 1051 return uvc_ctrl_rollback(handle); 1052 } 1053 1054 static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh, 1055 struct v4l2_ext_controls *ctrls) 1056 { 1057 struct uvc_fh *handle = fh; 1058 1059 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true); 1060 } 1061 1062 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh, 1063 struct v4l2_ext_controls *ctrls) 1064 { 1065 struct uvc_fh *handle = fh; 1066 1067 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false); 1068 } 1069 1070 static int uvc_ioctl_querymenu(struct file *file, void *fh, 1071 struct v4l2_querymenu *qm) 1072 { 1073 struct uvc_fh *handle = fh; 1074 struct uvc_video_chain *chain = handle->chain; 1075 1076 return uvc_query_v4l2_menu(chain, qm); 1077 } 1078 1079 static int uvc_ioctl_g_selection(struct file *file, void *fh, 1080 struct v4l2_selection *sel) 1081 { 1082 struct uvc_fh *handle = fh; 1083 struct uvc_streaming *stream = handle->stream; 1084 1085 if (sel->type != stream->type) 1086 return -EINVAL; 1087 1088 switch (sel->target) { 1089 case V4L2_SEL_TGT_CROP_DEFAULT: 1090 case V4L2_SEL_TGT_CROP_BOUNDS: 1091 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1092 return -EINVAL; 1093 break; 1094 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 1095 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1096 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1097 return -EINVAL; 1098 break; 1099 default: 1100 return -EINVAL; 1101 } 1102 1103 sel->r.left = 0; 1104 sel->r.top = 0; 1105 mutex_lock(&stream->mutex); 1106 sel->r.width = stream->cur_frame->wWidth; 1107 sel->r.height = stream->cur_frame->wHeight; 1108 mutex_unlock(&stream->mutex); 1109 1110 return 0; 1111 } 1112 1113 static int uvc_ioctl_g_parm(struct file *file, void *fh, 1114 struct v4l2_streamparm *parm) 1115 { 1116 struct uvc_fh *handle = fh; 1117 struct uvc_streaming *stream = handle->stream; 1118 1119 return uvc_v4l2_get_streamparm(stream, parm); 1120 } 1121 1122 static int uvc_ioctl_s_parm(struct file *file, void *fh, 1123 struct v4l2_streamparm *parm) 1124 { 1125 struct uvc_fh *handle = fh; 1126 struct uvc_streaming *stream = handle->stream; 1127 int ret; 1128 1129 ret = uvc_acquire_privileges(handle); 1130 if (ret < 0) 1131 return ret; 1132 1133 return uvc_v4l2_set_streamparm(stream, parm); 1134 } 1135 1136 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh, 1137 struct v4l2_frmsizeenum *fsize) 1138 { 1139 struct uvc_fh *handle = fh; 1140 struct uvc_streaming *stream = handle->stream; 1141 struct uvc_format *format = NULL; 1142 struct uvc_frame *frame; 1143 int i; 1144 1145 /* Look for the given pixel format */ 1146 for (i = 0; i < stream->nformats; i++) { 1147 if (stream->format[i].fcc == fsize->pixel_format) { 1148 format = &stream->format[i]; 1149 break; 1150 } 1151 } 1152 if (format == NULL) 1153 return -EINVAL; 1154 1155 if (fsize->index >= format->nframes) 1156 return -EINVAL; 1157 1158 frame = &format->frame[fsize->index]; 1159 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1160 fsize->discrete.width = frame->wWidth; 1161 fsize->discrete.height = frame->wHeight; 1162 return 0; 1163 } 1164 1165 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, 1166 struct v4l2_frmivalenum *fival) 1167 { 1168 struct uvc_fh *handle = fh; 1169 struct uvc_streaming *stream = handle->stream; 1170 struct uvc_format *format = NULL; 1171 struct uvc_frame *frame = NULL; 1172 int i; 1173 1174 /* Look for the given pixel format and frame size */ 1175 for (i = 0; i < stream->nformats; i++) { 1176 if (stream->format[i].fcc == fival->pixel_format) { 1177 format = &stream->format[i]; 1178 break; 1179 } 1180 } 1181 if (format == NULL) 1182 return -EINVAL; 1183 1184 for (i = 0; i < format->nframes; i++) { 1185 if (format->frame[i].wWidth == fival->width && 1186 format->frame[i].wHeight == fival->height) { 1187 frame = &format->frame[i]; 1188 break; 1189 } 1190 } 1191 if (frame == NULL) 1192 return -EINVAL; 1193 1194 if (frame->bFrameIntervalType) { 1195 if (fival->index >= frame->bFrameIntervalType) 1196 return -EINVAL; 1197 1198 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1199 fival->discrete.numerator = 1200 frame->dwFrameInterval[fival->index]; 1201 fival->discrete.denominator = 10000000; 1202 uvc_simplify_fraction(&fival->discrete.numerator, 1203 &fival->discrete.denominator, 8, 333); 1204 } else { 1205 if (fival->index) 1206 return -EINVAL; 1207 1208 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; 1209 fival->stepwise.min.numerator = frame->dwFrameInterval[0]; 1210 fival->stepwise.min.denominator = 10000000; 1211 fival->stepwise.max.numerator = frame->dwFrameInterval[1]; 1212 fival->stepwise.max.denominator = 10000000; 1213 fival->stepwise.step.numerator = frame->dwFrameInterval[2]; 1214 fival->stepwise.step.denominator = 10000000; 1215 uvc_simplify_fraction(&fival->stepwise.min.numerator, 1216 &fival->stepwise.min.denominator, 8, 333); 1217 uvc_simplify_fraction(&fival->stepwise.max.numerator, 1218 &fival->stepwise.max.denominator, 8, 333); 1219 uvc_simplify_fraction(&fival->stepwise.step.numerator, 1220 &fival->stepwise.step.denominator, 8, 333); 1221 } 1222 1223 return 0; 1224 } 1225 1226 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh, 1227 const struct v4l2_event_subscription *sub) 1228 { 1229 switch (sub->type) { 1230 case V4L2_EVENT_CTRL: 1231 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops); 1232 default: 1233 return -EINVAL; 1234 } 1235 } 1236 1237 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio, 1238 unsigned int cmd, void *arg) 1239 { 1240 struct uvc_fh *handle = fh; 1241 struct uvc_video_chain *chain = handle->chain; 1242 1243 switch (cmd) { 1244 /* Dynamic controls. */ 1245 case UVCIOC_CTRL_MAP: 1246 return uvc_ioctl_ctrl_map(chain, arg); 1247 1248 case UVCIOC_CTRL_QUERY: 1249 return uvc_xu_ctrl_query(chain, arg); 1250 1251 default: 1252 return -ENOTTY; 1253 } 1254 } 1255 1256 #ifdef CONFIG_COMPAT 1257 struct uvc_xu_control_mapping32 { 1258 __u32 id; 1259 __u8 name[32]; 1260 __u8 entity[16]; 1261 __u8 selector; 1262 1263 __u8 size; 1264 __u8 offset; 1265 __u32 v4l2_type; 1266 __u32 data_type; 1267 1268 compat_caddr_t menu_info; 1269 __u32 menu_count; 1270 1271 __u32 reserved[4]; 1272 }; 1273 1274 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, 1275 const struct uvc_xu_control_mapping32 __user *up) 1276 { 1277 compat_caddr_t p; 1278 1279 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 1280 __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) || 1281 __get_user(kp->menu_count, &up->menu_count)) 1282 return -EFAULT; 1283 1284 memset(kp->reserved, 0, sizeof(kp->reserved)); 1285 1286 if (kp->menu_count == 0) { 1287 kp->menu_info = NULL; 1288 return 0; 1289 } 1290 1291 if (__get_user(p, &up->menu_info)) 1292 return -EFAULT; 1293 kp->menu_info = compat_ptr(p); 1294 1295 return 0; 1296 } 1297 1298 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, 1299 struct uvc_xu_control_mapping32 __user *up) 1300 { 1301 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || 1302 __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 compat_caddr_t p; 1324 1325 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 1326 __copy_from_user(kp, up, offsetof(typeof(*up), data))) 1327 return -EFAULT; 1328 1329 if (kp->size == 0) { 1330 kp->data = NULL; 1331 return 0; 1332 } 1333 1334 if (__get_user(p, &up->data)) 1335 return -EFAULT; 1336 kp->data = compat_ptr(p); 1337 1338 return 0; 1339 } 1340 1341 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, 1342 struct uvc_xu_control_query32 __user *up) 1343 { 1344 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || 1345 __copy_to_user(up, kp, offsetof(typeof(*up), data))) 1346 return -EFAULT; 1347 1348 return 0; 1349 } 1350 1351 #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) 1352 #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) 1353 1354 static long uvc_v4l2_compat_ioctl32(struct file *file, 1355 unsigned int cmd, unsigned long arg) 1356 { 1357 struct uvc_fh *handle = file->private_data; 1358 union { 1359 struct uvc_xu_control_mapping xmap; 1360 struct uvc_xu_control_query xqry; 1361 } karg; 1362 void __user *up = compat_ptr(arg); 1363 long ret; 1364 1365 switch (cmd) { 1366 case UVCIOC_CTRL_MAP32: 1367 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); 1368 if (ret) 1369 return ret; 1370 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap); 1371 if (ret) 1372 return ret; 1373 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); 1374 if (ret) 1375 return ret; 1376 1377 break; 1378 1379 case UVCIOC_CTRL_QUERY32: 1380 ret = uvc_v4l2_get_xu_query(&karg.xqry, up); 1381 if (ret) 1382 return ret; 1383 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry); 1384 if (ret) 1385 return ret; 1386 ret = uvc_v4l2_put_xu_query(&karg.xqry, up); 1387 if (ret) 1388 return ret; 1389 break; 1390 1391 default: 1392 return -ENOIOCTLCMD; 1393 } 1394 1395 return ret; 1396 } 1397 #endif 1398 1399 static ssize_t uvc_v4l2_read(struct file *file, char __user *data, 1400 size_t count, loff_t *ppos) 1401 { 1402 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); 1403 return -EINVAL; 1404 } 1405 1406 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) 1407 { 1408 struct uvc_fh *handle = file->private_data; 1409 struct uvc_streaming *stream = handle->stream; 1410 1411 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); 1412 1413 return uvc_queue_mmap(&stream->queue, vma); 1414 } 1415 1416 static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) 1417 { 1418 struct uvc_fh *handle = file->private_data; 1419 struct uvc_streaming *stream = handle->stream; 1420 1421 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); 1422 1423 return uvc_queue_poll(&stream->queue, file, wait); 1424 } 1425 1426 #ifndef CONFIG_MMU 1427 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, 1428 unsigned long addr, unsigned long len, unsigned long pgoff, 1429 unsigned long flags) 1430 { 1431 struct uvc_fh *handle = file->private_data; 1432 struct uvc_streaming *stream = handle->stream; 1433 1434 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); 1435 1436 return uvc_queue_get_unmapped_area(&stream->queue, pgoff); 1437 } 1438 #endif 1439 1440 const struct v4l2_ioctl_ops uvc_ioctl_ops = { 1441 .vidioc_querycap = uvc_ioctl_querycap, 1442 .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap, 1443 .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out, 1444 .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap, 1445 .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out, 1446 .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap, 1447 .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out, 1448 .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap, 1449 .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out, 1450 .vidioc_reqbufs = uvc_ioctl_reqbufs, 1451 .vidioc_querybuf = uvc_ioctl_querybuf, 1452 .vidioc_qbuf = uvc_ioctl_qbuf, 1453 .vidioc_expbuf = uvc_ioctl_expbuf, 1454 .vidioc_dqbuf = uvc_ioctl_dqbuf, 1455 .vidioc_create_bufs = uvc_ioctl_create_bufs, 1456 .vidioc_streamon = uvc_ioctl_streamon, 1457 .vidioc_streamoff = uvc_ioctl_streamoff, 1458 .vidioc_enum_input = uvc_ioctl_enum_input, 1459 .vidioc_g_input = uvc_ioctl_g_input, 1460 .vidioc_s_input = uvc_ioctl_s_input, 1461 .vidioc_queryctrl = uvc_ioctl_queryctrl, 1462 .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl, 1463 .vidioc_g_ctrl = uvc_ioctl_g_ctrl, 1464 .vidioc_s_ctrl = uvc_ioctl_s_ctrl, 1465 .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls, 1466 .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls, 1467 .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls, 1468 .vidioc_querymenu = uvc_ioctl_querymenu, 1469 .vidioc_g_selection = uvc_ioctl_g_selection, 1470 .vidioc_g_parm = uvc_ioctl_g_parm, 1471 .vidioc_s_parm = uvc_ioctl_s_parm, 1472 .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes, 1473 .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals, 1474 .vidioc_subscribe_event = uvc_ioctl_subscribe_event, 1475 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1476 .vidioc_default = uvc_ioctl_default, 1477 }; 1478 1479 const struct v4l2_file_operations uvc_fops = { 1480 .owner = THIS_MODULE, 1481 .open = uvc_v4l2_open, 1482 .release = uvc_v4l2_release, 1483 .unlocked_ioctl = video_ioctl2, 1484 #ifdef CONFIG_COMPAT 1485 .compat_ioctl32 = uvc_v4l2_compat_ioctl32, 1486 #endif 1487 .read = uvc_v4l2_read, 1488 .mmap = uvc_v4l2_mmap, 1489 .poll = uvc_v4l2_poll, 1490 #ifndef CONFIG_MMU 1491 .get_unmapped_area = uvc_v4l2_get_unmapped_area, 1492 #endif 1493 }; 1494 1495