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 u32 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 struct uvc_format *format; 377 struct uvc_frame *frame; 378 u32 interval, maxd; 379 unsigned int i; 380 int ret; 381 382 if (parm->type != stream->type) 383 return -EINVAL; 384 385 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 386 timeperframe = parm->parm.capture.timeperframe; 387 else 388 timeperframe = parm->parm.output.timeperframe; 389 390 interval = uvc_fraction_to_interval(timeperframe.numerator, 391 timeperframe.denominator); 392 uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", 393 timeperframe.numerator, timeperframe.denominator, interval); 394 395 mutex_lock(&stream->mutex); 396 397 if (uvc_queue_streaming(&stream->queue)) { 398 mutex_unlock(&stream->mutex); 399 return -EBUSY; 400 } 401 402 format = stream->cur_format; 403 frame = stream->cur_frame; 404 probe = stream->ctrl; 405 probe.dwFrameInterval = uvc_try_frame_interval(frame, interval); 406 maxd = abs((s32)probe.dwFrameInterval - interval); 407 408 /* Try frames with matching size to find the best frame interval. */ 409 for (i = 0; i < format->nframes && maxd != 0; i++) { 410 u32 d, ival; 411 412 if (&format->frame[i] == stream->cur_frame) 413 continue; 414 415 if (format->frame[i].wWidth != stream->cur_frame->wWidth || 416 format->frame[i].wHeight != stream->cur_frame->wHeight) 417 continue; 418 419 ival = uvc_try_frame_interval(&format->frame[i], interval); 420 d = abs((s32)ival - interval); 421 if (d >= maxd) 422 continue; 423 424 frame = &format->frame[i]; 425 probe.bFrameIndex = frame->bFrameIndex; 426 probe.dwFrameInterval = ival; 427 maxd = d; 428 } 429 430 /* Probe the device with the new settings. */ 431 ret = uvc_probe_video(stream, &probe); 432 if (ret < 0) { 433 mutex_unlock(&stream->mutex); 434 return ret; 435 } 436 437 stream->ctrl = probe; 438 stream->cur_frame = frame; 439 mutex_unlock(&stream->mutex); 440 441 /* Return the actual frame period. */ 442 timeperframe.numerator = probe.dwFrameInterval; 443 timeperframe.denominator = 10000000; 444 uvc_simplify_fraction(&timeperframe.numerator, 445 &timeperframe.denominator, 8, 333); 446 447 if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 448 parm->parm.capture.timeperframe = timeperframe; 449 else 450 parm->parm.output.timeperframe = timeperframe; 451 452 return 0; 453 } 454 455 /* ------------------------------------------------------------------------ 456 * Privilege management 457 */ 458 459 /* 460 * Privilege management is the multiple-open implementation basis. The current 461 * implementation is completely transparent for the end-user and doesn't 462 * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. 463 * Those ioctls enable finer control on the device (by making possible for a 464 * user to request exclusive access to a device), but are not mature yet. 465 * Switching to the V4L2 priority mechanism might be considered in the future 466 * if this situation changes. 467 * 468 * Each open instance of a UVC device can either be in a privileged or 469 * unprivileged state. Only a single instance can be in a privileged state at 470 * a given time. Trying to perform an operation that requires privileges will 471 * automatically acquire the required privileges if possible, or return -EBUSY 472 * otherwise. Privileges are dismissed when closing the instance or when 473 * freeing the video buffers using VIDIOC_REQBUFS. 474 * 475 * Operations that require privileges are: 476 * 477 * - VIDIOC_S_INPUT 478 * - VIDIOC_S_PARM 479 * - VIDIOC_S_FMT 480 * - VIDIOC_REQBUFS 481 */ 482 static int uvc_acquire_privileges(struct uvc_fh *handle) 483 { 484 /* Always succeed if the handle is already privileged. */ 485 if (handle->state == UVC_HANDLE_ACTIVE) 486 return 0; 487 488 /* Check if the device already has a privileged handle. */ 489 if (atomic_inc_return(&handle->stream->active) != 1) { 490 atomic_dec(&handle->stream->active); 491 return -EBUSY; 492 } 493 494 handle->state = UVC_HANDLE_ACTIVE; 495 return 0; 496 } 497 498 static void uvc_dismiss_privileges(struct uvc_fh *handle) 499 { 500 if (handle->state == UVC_HANDLE_ACTIVE) 501 atomic_dec(&handle->stream->active); 502 503 handle->state = UVC_HANDLE_PASSIVE; 504 } 505 506 static int uvc_has_privileges(struct uvc_fh *handle) 507 { 508 return handle->state == UVC_HANDLE_ACTIVE; 509 } 510 511 /* ------------------------------------------------------------------------ 512 * V4L2 file operations 513 */ 514 515 static int uvc_v4l2_open(struct file *file) 516 { 517 struct uvc_streaming *stream; 518 struct uvc_fh *handle; 519 int ret = 0; 520 521 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); 522 stream = video_drvdata(file); 523 524 ret = usb_autopm_get_interface(stream->dev->intf); 525 if (ret < 0) 526 return ret; 527 528 /* Create the device handle. */ 529 handle = kzalloc(sizeof(*handle), GFP_KERNEL); 530 if (handle == NULL) { 531 usb_autopm_put_interface(stream->dev->intf); 532 return -ENOMEM; 533 } 534 535 mutex_lock(&stream->dev->lock); 536 if (stream->dev->users == 0) { 537 ret = uvc_status_start(stream->dev, GFP_KERNEL); 538 if (ret < 0) { 539 mutex_unlock(&stream->dev->lock); 540 usb_autopm_put_interface(stream->dev->intf); 541 kfree(handle); 542 return ret; 543 } 544 } 545 546 stream->dev->users++; 547 mutex_unlock(&stream->dev->lock); 548 549 v4l2_fh_init(&handle->vfh, &stream->vdev); 550 v4l2_fh_add(&handle->vfh); 551 handle->chain = stream->chain; 552 handle->stream = stream; 553 handle->state = UVC_HANDLE_PASSIVE; 554 file->private_data = handle; 555 556 return 0; 557 } 558 559 static int uvc_v4l2_release(struct file *file) 560 { 561 struct uvc_fh *handle = file->private_data; 562 struct uvc_streaming *stream = handle->stream; 563 564 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); 565 566 /* Only free resources if this is a privileged handle. */ 567 if (uvc_has_privileges(handle)) 568 uvc_queue_release(&stream->queue); 569 570 /* Release the file handle. */ 571 uvc_dismiss_privileges(handle); 572 v4l2_fh_del(&handle->vfh); 573 v4l2_fh_exit(&handle->vfh); 574 kfree(handle); 575 file->private_data = NULL; 576 577 mutex_lock(&stream->dev->lock); 578 if (--stream->dev->users == 0) 579 uvc_status_stop(stream->dev); 580 mutex_unlock(&stream->dev->lock); 581 582 usb_autopm_put_interface(stream->dev->intf); 583 return 0; 584 } 585 586 static int uvc_ioctl_querycap(struct file *file, void *fh, 587 struct v4l2_capability *cap) 588 { 589 struct video_device *vdev = video_devdata(file); 590 struct uvc_fh *handle = file->private_data; 591 struct uvc_video_chain *chain = handle->chain; 592 struct uvc_streaming *stream = handle->stream; 593 594 strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); 595 strlcpy(cap->card, vdev->name, sizeof(cap->card)); 596 usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); 597 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING 598 | chain->caps; 599 600 return 0; 601 } 602 603 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream, 604 struct v4l2_fmtdesc *fmt) 605 { 606 struct uvc_format *format; 607 enum v4l2_buf_type type = fmt->type; 608 u32 index = fmt->index; 609 610 if (fmt->type != stream->type || fmt->index >= stream->nformats) 611 return -EINVAL; 612 613 memset(fmt, 0, sizeof(*fmt)); 614 fmt->index = index; 615 fmt->type = type; 616 617 format = &stream->format[fmt->index]; 618 fmt->flags = 0; 619 if (format->flags & UVC_FMT_FLAG_COMPRESSED) 620 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; 621 strlcpy(fmt->description, format->name, sizeof(fmt->description)); 622 fmt->description[sizeof(fmt->description) - 1] = 0; 623 fmt->pixelformat = format->fcc; 624 return 0; 625 } 626 627 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh, 628 struct v4l2_fmtdesc *fmt) 629 { 630 struct uvc_fh *handle = fh; 631 struct uvc_streaming *stream = handle->stream; 632 633 return uvc_ioctl_enum_fmt(stream, fmt); 634 } 635 636 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh, 637 struct v4l2_fmtdesc *fmt) 638 { 639 struct uvc_fh *handle = fh; 640 struct uvc_streaming *stream = handle->stream; 641 642 return uvc_ioctl_enum_fmt(stream, fmt); 643 } 644 645 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh, 646 struct v4l2_format *fmt) 647 { 648 struct uvc_fh *handle = fh; 649 struct uvc_streaming *stream = handle->stream; 650 651 return uvc_v4l2_get_format(stream, fmt); 652 } 653 654 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh, 655 struct v4l2_format *fmt) 656 { 657 struct uvc_fh *handle = fh; 658 struct uvc_streaming *stream = handle->stream; 659 660 return uvc_v4l2_get_format(stream, fmt); 661 } 662 663 static int uvc_ioctl_s_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 int ret; 669 670 ret = uvc_acquire_privileges(handle); 671 if (ret < 0) 672 return ret; 673 674 return uvc_v4l2_set_format(stream, fmt); 675 } 676 677 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh, 678 struct v4l2_format *fmt) 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 return uvc_v4l2_set_format(stream, fmt); 689 } 690 691 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh, 692 struct v4l2_format *fmt) 693 { 694 struct uvc_fh *handle = fh; 695 struct uvc_streaming *stream = handle->stream; 696 struct uvc_streaming_control probe; 697 698 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 699 } 700 701 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh, 702 struct v4l2_format *fmt) 703 { 704 struct uvc_fh *handle = fh; 705 struct uvc_streaming *stream = handle->stream; 706 struct uvc_streaming_control probe; 707 708 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 709 } 710 711 static int uvc_ioctl_reqbufs(struct file *file, void *fh, 712 struct v4l2_requestbuffers *rb) 713 { 714 struct uvc_fh *handle = fh; 715 struct uvc_streaming *stream = handle->stream; 716 int ret; 717 718 ret = uvc_acquire_privileges(handle); 719 if (ret < 0) 720 return ret; 721 722 mutex_lock(&stream->mutex); 723 ret = uvc_request_buffers(&stream->queue, rb); 724 mutex_unlock(&stream->mutex); 725 if (ret < 0) 726 return ret; 727 728 if (ret == 0) 729 uvc_dismiss_privileges(handle); 730 731 return 0; 732 } 733 734 static int uvc_ioctl_querybuf(struct file *file, void *fh, 735 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_query_buffer(&stream->queue, buf); 744 } 745 746 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 747 { 748 struct uvc_fh *handle = fh; 749 struct uvc_streaming *stream = handle->stream; 750 751 if (!uvc_has_privileges(handle)) 752 return -EBUSY; 753 754 return uvc_queue_buffer(&stream->queue, buf); 755 } 756 757 static int uvc_ioctl_expbuf(struct file *file, void *fh, 758 struct v4l2_exportbuffer *exp) 759 { 760 struct uvc_fh *handle = fh; 761 struct uvc_streaming *stream = handle->stream; 762 763 if (!uvc_has_privileges(handle)) 764 return -EBUSY; 765 766 return uvc_export_buffer(&stream->queue, exp); 767 } 768 769 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 770 { 771 struct uvc_fh *handle = fh; 772 struct uvc_streaming *stream = handle->stream; 773 774 if (!uvc_has_privileges(handle)) 775 return -EBUSY; 776 777 return uvc_dequeue_buffer(&stream->queue, buf, 778 file->f_flags & O_NONBLOCK); 779 } 780 781 static int uvc_ioctl_create_bufs(struct file *file, void *fh, 782 struct v4l2_create_buffers *cb) 783 { 784 struct uvc_fh *handle = fh; 785 struct uvc_streaming *stream = handle->stream; 786 int ret; 787 788 ret = uvc_acquire_privileges(handle); 789 if (ret < 0) 790 return ret; 791 792 return uvc_create_buffers(&stream->queue, cb); 793 } 794 795 static int uvc_ioctl_streamon(struct file *file, void *fh, 796 enum v4l2_buf_type type) 797 { 798 struct uvc_fh *handle = fh; 799 struct uvc_streaming *stream = handle->stream; 800 int ret; 801 802 if (!uvc_has_privileges(handle)) 803 return -EBUSY; 804 805 mutex_lock(&stream->mutex); 806 ret = uvc_queue_streamon(&stream->queue, type); 807 mutex_unlock(&stream->mutex); 808 809 return ret; 810 } 811 812 static int uvc_ioctl_streamoff(struct file *file, void *fh, 813 enum v4l2_buf_type type) 814 { 815 struct uvc_fh *handle = fh; 816 struct uvc_streaming *stream = handle->stream; 817 818 if (!uvc_has_privileges(handle)) 819 return -EBUSY; 820 821 mutex_lock(&stream->mutex); 822 uvc_queue_streamoff(&stream->queue, type); 823 mutex_unlock(&stream->mutex); 824 825 return 0; 826 } 827 828 static int uvc_ioctl_enum_input(struct file *file, void *fh, 829 struct v4l2_input *input) 830 { 831 struct uvc_fh *handle = fh; 832 struct uvc_video_chain *chain = handle->chain; 833 const struct uvc_entity *selector = chain->selector; 834 struct uvc_entity *iterm = NULL; 835 u32 index = input->index; 836 int pin = 0; 837 838 if (selector == NULL || 839 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 840 if (index != 0) 841 return -EINVAL; 842 list_for_each_entry(iterm, &chain->entities, chain) { 843 if (UVC_ENTITY_IS_ITERM(iterm)) 844 break; 845 } 846 pin = iterm->id; 847 } else if (index < selector->bNrInPins) { 848 pin = selector->baSourceID[index]; 849 list_for_each_entry(iterm, &chain->entities, chain) { 850 if (!UVC_ENTITY_IS_ITERM(iterm)) 851 continue; 852 if (iterm->id == pin) 853 break; 854 } 855 } 856 857 if (iterm == NULL || iterm->id != pin) 858 return -EINVAL; 859 860 memset(input, 0, sizeof(*input)); 861 input->index = index; 862 strlcpy(input->name, iterm->name, sizeof(input->name)); 863 if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) 864 input->type = V4L2_INPUT_TYPE_CAMERA; 865 866 return 0; 867 } 868 869 static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input) 870 { 871 struct uvc_fh *handle = fh; 872 struct uvc_video_chain *chain = handle->chain; 873 int ret; 874 u8 i; 875 876 if (chain->selector == NULL || 877 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 878 *input = 0; 879 return 0; 880 } 881 882 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id, 883 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 884 &i, 1); 885 if (ret < 0) 886 return ret; 887 888 *input = i - 1; 889 return 0; 890 } 891 892 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input) 893 { 894 struct uvc_fh *handle = fh; 895 struct uvc_video_chain *chain = handle->chain; 896 int ret; 897 u32 i; 898 899 ret = uvc_acquire_privileges(handle); 900 if (ret < 0) 901 return ret; 902 903 if (chain->selector == NULL || 904 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 905 if (input) 906 return -EINVAL; 907 return 0; 908 } 909 910 if (input >= chain->selector->bNrInPins) 911 return -EINVAL; 912 913 i = input + 1; 914 return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id, 915 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 916 &i, 1); 917 } 918 919 static int uvc_ioctl_queryctrl(struct file *file, void *fh, 920 struct v4l2_queryctrl *qc) 921 { 922 struct uvc_fh *handle = fh; 923 struct uvc_video_chain *chain = handle->chain; 924 925 return uvc_query_v4l2_ctrl(chain, qc); 926 } 927 928 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh, 929 struct v4l2_query_ext_ctrl *qec) 930 { 931 struct uvc_fh *handle = fh; 932 struct uvc_video_chain *chain = handle->chain; 933 struct v4l2_queryctrl qc = { qec->id }; 934 int ret; 935 936 ret = uvc_query_v4l2_ctrl(chain, &qc); 937 if (ret) 938 return ret; 939 940 qec->id = qc.id; 941 qec->type = qc.type; 942 strlcpy(qec->name, qc.name, sizeof(qec->name)); 943 qec->minimum = qc.minimum; 944 qec->maximum = qc.maximum; 945 qec->step = qc.step; 946 qec->default_value = qc.default_value; 947 qec->flags = qc.flags; 948 qec->elem_size = 4; 949 qec->elems = 1; 950 qec->nr_of_dims = 0; 951 memset(qec->dims, 0, sizeof(qec->dims)); 952 memset(qec->reserved, 0, sizeof(qec->reserved)); 953 954 return 0; 955 } 956 957 static int uvc_ioctl_g_ctrl(struct file *file, void *fh, 958 struct v4l2_control *ctrl) 959 { 960 struct uvc_fh *handle = fh; 961 struct uvc_video_chain *chain = handle->chain; 962 struct v4l2_ext_control xctrl; 963 int ret; 964 965 memset(&xctrl, 0, sizeof(xctrl)); 966 xctrl.id = ctrl->id; 967 968 ret = uvc_ctrl_begin(chain); 969 if (ret < 0) 970 return ret; 971 972 ret = uvc_ctrl_get(chain, &xctrl); 973 uvc_ctrl_rollback(handle); 974 if (ret < 0) 975 return ret; 976 977 ctrl->value = xctrl.value; 978 return 0; 979 } 980 981 static int uvc_ioctl_s_ctrl(struct file *file, void *fh, 982 struct v4l2_control *ctrl) 983 { 984 struct uvc_fh *handle = fh; 985 struct uvc_video_chain *chain = handle->chain; 986 struct v4l2_ext_control xctrl; 987 int ret; 988 989 memset(&xctrl, 0, sizeof(xctrl)); 990 xctrl.id = ctrl->id; 991 xctrl.value = ctrl->value; 992 993 ret = uvc_ctrl_begin(chain); 994 if (ret < 0) 995 return ret; 996 997 ret = uvc_ctrl_set(chain, &xctrl); 998 if (ret < 0) { 999 uvc_ctrl_rollback(handle); 1000 return ret; 1001 } 1002 1003 ret = uvc_ctrl_commit(handle, &xctrl, 1); 1004 if (ret < 0) 1005 return ret; 1006 1007 ctrl->value = xctrl.value; 1008 return 0; 1009 } 1010 1011 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, 1012 struct v4l2_ext_controls *ctrls) 1013 { 1014 struct uvc_fh *handle = fh; 1015 struct uvc_video_chain *chain = handle->chain; 1016 struct v4l2_ext_control *ctrl = ctrls->controls; 1017 unsigned int i; 1018 int ret; 1019 1020 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) { 1021 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1022 struct v4l2_queryctrl qc = { .id = ctrl->id }; 1023 1024 ret = uvc_query_v4l2_ctrl(chain, &qc); 1025 if (ret < 0) { 1026 ctrls->error_idx = i; 1027 return ret; 1028 } 1029 1030 ctrl->value = qc.default_value; 1031 } 1032 1033 return 0; 1034 } 1035 1036 ret = uvc_ctrl_begin(chain); 1037 if (ret < 0) 1038 return ret; 1039 1040 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1041 ret = uvc_ctrl_get(chain, ctrl); 1042 if (ret < 0) { 1043 uvc_ctrl_rollback(handle); 1044 ctrls->error_idx = i; 1045 return ret; 1046 } 1047 } 1048 1049 ctrls->error_idx = 0; 1050 1051 return uvc_ctrl_rollback(handle); 1052 } 1053 1054 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, 1055 struct v4l2_ext_controls *ctrls, 1056 bool commit) 1057 { 1058 struct v4l2_ext_control *ctrl = ctrls->controls; 1059 struct uvc_video_chain *chain = handle->chain; 1060 unsigned int i; 1061 int ret; 1062 1063 /* Default value cannot be changed */ 1064 if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) 1065 return -EINVAL; 1066 1067 ret = uvc_ctrl_begin(chain); 1068 if (ret < 0) 1069 return ret; 1070 1071 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1072 ret = uvc_ctrl_set(chain, ctrl); 1073 if (ret < 0) { 1074 uvc_ctrl_rollback(handle); 1075 ctrls->error_idx = commit ? ctrls->count : i; 1076 return ret; 1077 } 1078 } 1079 1080 ctrls->error_idx = 0; 1081 1082 if (commit) 1083 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); 1084 else 1085 return uvc_ctrl_rollback(handle); 1086 } 1087 1088 static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh, 1089 struct v4l2_ext_controls *ctrls) 1090 { 1091 struct uvc_fh *handle = fh; 1092 1093 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true); 1094 } 1095 1096 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh, 1097 struct v4l2_ext_controls *ctrls) 1098 { 1099 struct uvc_fh *handle = fh; 1100 1101 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false); 1102 } 1103 1104 static int uvc_ioctl_querymenu(struct file *file, void *fh, 1105 struct v4l2_querymenu *qm) 1106 { 1107 struct uvc_fh *handle = fh; 1108 struct uvc_video_chain *chain = handle->chain; 1109 1110 return uvc_query_v4l2_menu(chain, qm); 1111 } 1112 1113 static int uvc_ioctl_g_selection(struct file *file, void *fh, 1114 struct v4l2_selection *sel) 1115 { 1116 struct uvc_fh *handle = fh; 1117 struct uvc_streaming *stream = handle->stream; 1118 1119 if (sel->type != stream->type) 1120 return -EINVAL; 1121 1122 switch (sel->target) { 1123 case V4L2_SEL_TGT_CROP_DEFAULT: 1124 case V4L2_SEL_TGT_CROP_BOUNDS: 1125 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1126 return -EINVAL; 1127 break; 1128 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 1129 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1130 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1131 return -EINVAL; 1132 break; 1133 default: 1134 return -EINVAL; 1135 } 1136 1137 sel->r.left = 0; 1138 sel->r.top = 0; 1139 mutex_lock(&stream->mutex); 1140 sel->r.width = stream->cur_frame->wWidth; 1141 sel->r.height = stream->cur_frame->wHeight; 1142 mutex_unlock(&stream->mutex); 1143 1144 return 0; 1145 } 1146 1147 static int uvc_ioctl_g_parm(struct file *file, void *fh, 1148 struct v4l2_streamparm *parm) 1149 { 1150 struct uvc_fh *handle = fh; 1151 struct uvc_streaming *stream = handle->stream; 1152 1153 return uvc_v4l2_get_streamparm(stream, parm); 1154 } 1155 1156 static int uvc_ioctl_s_parm(struct file *file, void *fh, 1157 struct v4l2_streamparm *parm) 1158 { 1159 struct uvc_fh *handle = fh; 1160 struct uvc_streaming *stream = handle->stream; 1161 int ret; 1162 1163 ret = uvc_acquire_privileges(handle); 1164 if (ret < 0) 1165 return ret; 1166 1167 return uvc_v4l2_set_streamparm(stream, parm); 1168 } 1169 1170 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh, 1171 struct v4l2_frmsizeenum *fsize) 1172 { 1173 struct uvc_fh *handle = fh; 1174 struct uvc_streaming *stream = handle->stream; 1175 struct uvc_format *format = NULL; 1176 struct uvc_frame *frame = NULL; 1177 unsigned int index; 1178 unsigned int i; 1179 1180 /* Look for the given pixel format */ 1181 for (i = 0; i < stream->nformats; i++) { 1182 if (stream->format[i].fcc == fsize->pixel_format) { 1183 format = &stream->format[i]; 1184 break; 1185 } 1186 } 1187 if (format == NULL) 1188 return -EINVAL; 1189 1190 /* Skip duplicate frame sizes */ 1191 for (i = 0, index = 0; i < format->nframes; i++) { 1192 if (frame && frame->wWidth == format->frame[i].wWidth && 1193 frame->wHeight == format->frame[i].wHeight) 1194 continue; 1195 frame = &format->frame[i]; 1196 if (index == fsize->index) 1197 break; 1198 index++; 1199 } 1200 1201 if (i == format->nframes) 1202 return -EINVAL; 1203 1204 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1205 fsize->discrete.width = frame->wWidth; 1206 fsize->discrete.height = frame->wHeight; 1207 return 0; 1208 } 1209 1210 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, 1211 struct v4l2_frmivalenum *fival) 1212 { 1213 struct uvc_fh *handle = fh; 1214 struct uvc_streaming *stream = handle->stream; 1215 struct uvc_format *format = NULL; 1216 struct uvc_frame *frame = NULL; 1217 unsigned int nintervals; 1218 unsigned int index; 1219 unsigned int i; 1220 1221 /* Look for the given pixel format and frame size */ 1222 for (i = 0; i < stream->nformats; i++) { 1223 if (stream->format[i].fcc == fival->pixel_format) { 1224 format = &stream->format[i]; 1225 break; 1226 } 1227 } 1228 if (format == NULL) 1229 return -EINVAL; 1230 1231 index = fival->index; 1232 for (i = 0; i < format->nframes; i++) { 1233 if (format->frame[i].wWidth == fival->width && 1234 format->frame[i].wHeight == fival->height) { 1235 frame = &format->frame[i]; 1236 nintervals = frame->bFrameIntervalType ?: 1; 1237 if (index < nintervals) 1238 break; 1239 index -= nintervals; 1240 } 1241 } 1242 if (i == format->nframes) 1243 return -EINVAL; 1244 1245 if (frame->bFrameIntervalType) { 1246 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1247 fival->discrete.numerator = 1248 frame->dwFrameInterval[index]; 1249 fival->discrete.denominator = 10000000; 1250 uvc_simplify_fraction(&fival->discrete.numerator, 1251 &fival->discrete.denominator, 8, 333); 1252 } else { 1253 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; 1254 fival->stepwise.min.numerator = frame->dwFrameInterval[0]; 1255 fival->stepwise.min.denominator = 10000000; 1256 fival->stepwise.max.numerator = frame->dwFrameInterval[1]; 1257 fival->stepwise.max.denominator = 10000000; 1258 fival->stepwise.step.numerator = frame->dwFrameInterval[2]; 1259 fival->stepwise.step.denominator = 10000000; 1260 uvc_simplify_fraction(&fival->stepwise.min.numerator, 1261 &fival->stepwise.min.denominator, 8, 333); 1262 uvc_simplify_fraction(&fival->stepwise.max.numerator, 1263 &fival->stepwise.max.denominator, 8, 333); 1264 uvc_simplify_fraction(&fival->stepwise.step.numerator, 1265 &fival->stepwise.step.denominator, 8, 333); 1266 } 1267 1268 return 0; 1269 } 1270 1271 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh, 1272 const struct v4l2_event_subscription *sub) 1273 { 1274 switch (sub->type) { 1275 case V4L2_EVENT_CTRL: 1276 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops); 1277 default: 1278 return -EINVAL; 1279 } 1280 } 1281 1282 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio, 1283 unsigned int cmd, void *arg) 1284 { 1285 struct uvc_fh *handle = fh; 1286 struct uvc_video_chain *chain = handle->chain; 1287 1288 switch (cmd) { 1289 /* Dynamic controls. */ 1290 case UVCIOC_CTRL_MAP: 1291 return uvc_ioctl_ctrl_map(chain, arg); 1292 1293 case UVCIOC_CTRL_QUERY: 1294 return uvc_xu_ctrl_query(chain, arg); 1295 1296 default: 1297 return -ENOTTY; 1298 } 1299 } 1300 1301 #ifdef CONFIG_COMPAT 1302 struct uvc_xu_control_mapping32 { 1303 u32 id; 1304 u8 name[32]; 1305 u8 entity[16]; 1306 u8 selector; 1307 1308 u8 size; 1309 u8 offset; 1310 u32 v4l2_type; 1311 u32 data_type; 1312 1313 compat_caddr_t menu_info; 1314 u32 menu_count; 1315 1316 u32 reserved[4]; 1317 }; 1318 1319 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, 1320 const struct uvc_xu_control_mapping32 __user *up) 1321 { 1322 struct uvc_xu_control_mapping32 *p = (void *)kp; 1323 compat_caddr_t info; 1324 u32 count; 1325 1326 if (copy_from_user(p, up, sizeof(*p))) 1327 return -EFAULT; 1328 1329 count = p->menu_count; 1330 info = p->menu_info; 1331 1332 memset(kp->reserved, 0, sizeof(kp->reserved)); 1333 kp->menu_info = count ? compat_ptr(info) : NULL; 1334 kp->menu_count = count; 1335 return 0; 1336 } 1337 1338 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, 1339 struct uvc_xu_control_mapping32 __user *up) 1340 { 1341 if (copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) || 1342 put_user(kp->menu_count, &up->menu_count)) 1343 return -EFAULT; 1344 1345 if (clear_user(up->reserved, sizeof(up->reserved))) 1346 return -EFAULT; 1347 1348 return 0; 1349 } 1350 1351 struct uvc_xu_control_query32 { 1352 u8 unit; 1353 u8 selector; 1354 u8 query; 1355 u16 size; 1356 compat_caddr_t data; 1357 }; 1358 1359 static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp, 1360 const struct uvc_xu_control_query32 __user *up) 1361 { 1362 struct uvc_xu_control_query32 v; 1363 1364 if (copy_from_user(&v, up, sizeof(v))) 1365 return -EFAULT; 1366 1367 *kp = (struct uvc_xu_control_query){ 1368 .unit = v.unit, 1369 .selector = v.selector, 1370 .query = v.query, 1371 .size = v.size, 1372 .data = v.size ? compat_ptr(v.data) : NULL 1373 }; 1374 return 0; 1375 } 1376 1377 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, 1378 struct uvc_xu_control_query32 __user *up) 1379 { 1380 if (copy_to_user(up, kp, offsetof(typeof(*up), data))) 1381 return -EFAULT; 1382 return 0; 1383 } 1384 1385 #define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) 1386 #define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) 1387 1388 static long uvc_v4l2_compat_ioctl32(struct file *file, 1389 unsigned int cmd, unsigned long arg) 1390 { 1391 struct uvc_fh *handle = file->private_data; 1392 union { 1393 struct uvc_xu_control_mapping xmap; 1394 struct uvc_xu_control_query xqry; 1395 } karg; 1396 void __user *up = compat_ptr(arg); 1397 long ret; 1398 1399 switch (cmd) { 1400 case UVCIOC_CTRL_MAP32: 1401 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); 1402 if (ret) 1403 return ret; 1404 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap); 1405 if (ret) 1406 return ret; 1407 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); 1408 if (ret) 1409 return ret; 1410 1411 break; 1412 1413 case UVCIOC_CTRL_QUERY32: 1414 ret = uvc_v4l2_get_xu_query(&karg.xqry, up); 1415 if (ret) 1416 return ret; 1417 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry); 1418 if (ret) 1419 return ret; 1420 ret = uvc_v4l2_put_xu_query(&karg.xqry, up); 1421 if (ret) 1422 return ret; 1423 break; 1424 1425 default: 1426 return -ENOIOCTLCMD; 1427 } 1428 1429 return ret; 1430 } 1431 #endif 1432 1433 static ssize_t uvc_v4l2_read(struct file *file, char __user *data, 1434 size_t count, loff_t *ppos) 1435 { 1436 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); 1437 return -EINVAL; 1438 } 1439 1440 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) 1441 { 1442 struct uvc_fh *handle = file->private_data; 1443 struct uvc_streaming *stream = handle->stream; 1444 1445 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); 1446 1447 return uvc_queue_mmap(&stream->queue, vma); 1448 } 1449 1450 static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait) 1451 { 1452 struct uvc_fh *handle = file->private_data; 1453 struct uvc_streaming *stream = handle->stream; 1454 1455 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); 1456 1457 return uvc_queue_poll(&stream->queue, file, wait); 1458 } 1459 1460 #ifndef CONFIG_MMU 1461 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, 1462 unsigned long addr, unsigned long len, unsigned long pgoff, 1463 unsigned long flags) 1464 { 1465 struct uvc_fh *handle = file->private_data; 1466 struct uvc_streaming *stream = handle->stream; 1467 1468 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); 1469 1470 return uvc_queue_get_unmapped_area(&stream->queue, pgoff); 1471 } 1472 #endif 1473 1474 const struct v4l2_ioctl_ops uvc_ioctl_ops = { 1475 .vidioc_querycap = uvc_ioctl_querycap, 1476 .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap, 1477 .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out, 1478 .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap, 1479 .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out, 1480 .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap, 1481 .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out, 1482 .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap, 1483 .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out, 1484 .vidioc_reqbufs = uvc_ioctl_reqbufs, 1485 .vidioc_querybuf = uvc_ioctl_querybuf, 1486 .vidioc_qbuf = uvc_ioctl_qbuf, 1487 .vidioc_expbuf = uvc_ioctl_expbuf, 1488 .vidioc_dqbuf = uvc_ioctl_dqbuf, 1489 .vidioc_create_bufs = uvc_ioctl_create_bufs, 1490 .vidioc_streamon = uvc_ioctl_streamon, 1491 .vidioc_streamoff = uvc_ioctl_streamoff, 1492 .vidioc_enum_input = uvc_ioctl_enum_input, 1493 .vidioc_g_input = uvc_ioctl_g_input, 1494 .vidioc_s_input = uvc_ioctl_s_input, 1495 .vidioc_queryctrl = uvc_ioctl_queryctrl, 1496 .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl, 1497 .vidioc_g_ctrl = uvc_ioctl_g_ctrl, 1498 .vidioc_s_ctrl = uvc_ioctl_s_ctrl, 1499 .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls, 1500 .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls, 1501 .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls, 1502 .vidioc_querymenu = uvc_ioctl_querymenu, 1503 .vidioc_g_selection = uvc_ioctl_g_selection, 1504 .vidioc_g_parm = uvc_ioctl_g_parm, 1505 .vidioc_s_parm = uvc_ioctl_s_parm, 1506 .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes, 1507 .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals, 1508 .vidioc_subscribe_event = uvc_ioctl_subscribe_event, 1509 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1510 .vidioc_default = uvc_ioctl_default, 1511 }; 1512 1513 const struct v4l2_file_operations uvc_fops = { 1514 .owner = THIS_MODULE, 1515 .open = uvc_v4l2_open, 1516 .release = uvc_v4l2_release, 1517 .unlocked_ioctl = video_ioctl2, 1518 #ifdef CONFIG_COMPAT 1519 .compat_ioctl32 = uvc_v4l2_compat_ioctl32, 1520 #endif 1521 .read = uvc_v4l2_read, 1522 .mmap = uvc_v4l2_mmap, 1523 .poll = uvc_v4l2_poll, 1524 #ifndef CONFIG_MMU 1525 .get_unmapped_area = uvc_v4l2_get_unmapped_area, 1526 #endif 1527 }; 1528 1529