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 */ 36static 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 96done: 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 */ 113static __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 145static 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 258done: 259 return ret; 260} 261 262static 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 290done: 291 mutex_unlock(&stream->mutex); 292 return ret; 293} 294 295static 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 321done: 322 mutex_unlock(&stream->mutex); 323 return ret; 324} 325 326static 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 361static 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 */ 444static 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 460static 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 468static 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 477static 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 if (stream->dev->state & UVC_DEV_DISCONNECTED) 487 return -ENODEV; 488 489 ret = usb_autopm_get_interface(stream->dev->intf); 490 if (ret < 0) 491 return ret; 492 493 /* Create the device handle. */ 494 handle = kzalloc(sizeof *handle, GFP_KERNEL); 495 if (handle == NULL) { 496 usb_autopm_put_interface(stream->dev->intf); 497 return -ENOMEM; 498 } 499 500 mutex_lock(&stream->dev->lock); 501 if (stream->dev->users == 0) { 502 ret = uvc_status_start(stream->dev, GFP_KERNEL); 503 if (ret < 0) { 504 mutex_unlock(&stream->dev->lock); 505 usb_autopm_put_interface(stream->dev->intf); 506 kfree(handle); 507 return ret; 508 } 509 } 510 511 stream->dev->users++; 512 mutex_unlock(&stream->dev->lock); 513 514 v4l2_fh_init(&handle->vfh, &stream->vdev); 515 v4l2_fh_add(&handle->vfh); 516 handle->chain = stream->chain; 517 handle->stream = stream; 518 handle->state = UVC_HANDLE_PASSIVE; 519 file->private_data = handle; 520 521 return 0; 522} 523 524static int uvc_v4l2_release(struct file *file) 525{ 526 struct uvc_fh *handle = file->private_data; 527 struct uvc_streaming *stream = handle->stream; 528 529 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); 530 531 /* Only free resources if this is a privileged handle. */ 532 if (uvc_has_privileges(handle)) 533 uvc_queue_release(&stream->queue); 534 535 /* Release the file handle. */ 536 uvc_dismiss_privileges(handle); 537 v4l2_fh_del(&handle->vfh); 538 v4l2_fh_exit(&handle->vfh); 539 kfree(handle); 540 file->private_data = NULL; 541 542 mutex_lock(&stream->dev->lock); 543 if (--stream->dev->users == 0) 544 uvc_status_stop(stream->dev); 545 mutex_unlock(&stream->dev->lock); 546 547 usb_autopm_put_interface(stream->dev->intf); 548 return 0; 549} 550 551static int uvc_ioctl_querycap(struct file *file, void *fh, 552 struct v4l2_capability *cap) 553{ 554 struct video_device *vdev = video_devdata(file); 555 struct uvc_fh *handle = file->private_data; 556 struct uvc_video_chain *chain = handle->chain; 557 struct uvc_streaming *stream = handle->stream; 558 559 strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver)); 560 strlcpy(cap->card, vdev->name, sizeof(cap->card)); 561 usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info)); 562 cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING 563 | chain->caps; 564 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 565 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 566 else 567 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 568 569 return 0; 570} 571 572static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream, 573 struct v4l2_fmtdesc *fmt) 574{ 575 struct uvc_format *format; 576 enum v4l2_buf_type type = fmt->type; 577 __u32 index = fmt->index; 578 579 if (fmt->type != stream->type || fmt->index >= stream->nformats) 580 return -EINVAL; 581 582 memset(fmt, 0, sizeof(*fmt)); 583 fmt->index = index; 584 fmt->type = type; 585 586 format = &stream->format[fmt->index]; 587 fmt->flags = 0; 588 if (format->flags & UVC_FMT_FLAG_COMPRESSED) 589 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; 590 strlcpy(fmt->description, format->name, sizeof(fmt->description)); 591 fmt->description[sizeof(fmt->description) - 1] = 0; 592 fmt->pixelformat = format->fcc; 593 return 0; 594} 595 596static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh, 597 struct v4l2_fmtdesc *fmt) 598{ 599 struct uvc_fh *handle = fh; 600 struct uvc_streaming *stream = handle->stream; 601 602 return uvc_ioctl_enum_fmt(stream, fmt); 603} 604 605static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh, 606 struct v4l2_fmtdesc *fmt) 607{ 608 struct uvc_fh *handle = fh; 609 struct uvc_streaming *stream = handle->stream; 610 611 return uvc_ioctl_enum_fmt(stream, fmt); 612} 613 614static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh, 615 struct v4l2_format *fmt) 616{ 617 struct uvc_fh *handle = fh; 618 struct uvc_streaming *stream = handle->stream; 619 620 return uvc_v4l2_get_format(stream, fmt); 621} 622 623static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh, 624 struct v4l2_format *fmt) 625{ 626 struct uvc_fh *handle = fh; 627 struct uvc_streaming *stream = handle->stream; 628 629 return uvc_v4l2_get_format(stream, fmt); 630} 631 632static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh, 633 struct v4l2_format *fmt) 634{ 635 struct uvc_fh *handle = fh; 636 struct uvc_streaming *stream = handle->stream; 637 int ret; 638 639 ret = uvc_acquire_privileges(handle); 640 if (ret < 0) 641 return ret; 642 643 return uvc_v4l2_set_format(stream, fmt); 644} 645 646static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh, 647 struct v4l2_format *fmt) 648{ 649 struct uvc_fh *handle = fh; 650 struct uvc_streaming *stream = handle->stream; 651 int ret; 652 653 ret = uvc_acquire_privileges(handle); 654 if (ret < 0) 655 return ret; 656 657 return uvc_v4l2_set_format(stream, fmt); 658} 659 660static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh, 661 struct v4l2_format *fmt) 662{ 663 struct uvc_fh *handle = fh; 664 struct uvc_streaming *stream = handle->stream; 665 struct uvc_streaming_control probe; 666 667 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 668} 669 670static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh, 671 struct v4l2_format *fmt) 672{ 673 struct uvc_fh *handle = fh; 674 struct uvc_streaming *stream = handle->stream; 675 struct uvc_streaming_control probe; 676 677 return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); 678} 679 680static int uvc_ioctl_reqbufs(struct file *file, void *fh, 681 struct v4l2_requestbuffers *rb) 682{ 683 struct uvc_fh *handle = fh; 684 struct uvc_streaming *stream = handle->stream; 685 int ret; 686 687 ret = uvc_acquire_privileges(handle); 688 if (ret < 0) 689 return ret; 690 691 mutex_lock(&stream->mutex); 692 ret = uvc_request_buffers(&stream->queue, rb); 693 mutex_unlock(&stream->mutex); 694 if (ret < 0) 695 return ret; 696 697 if (ret == 0) 698 uvc_dismiss_privileges(handle); 699 700 return 0; 701} 702 703static int uvc_ioctl_querybuf(struct file *file, void *fh, 704 struct v4l2_buffer *buf) 705{ 706 struct uvc_fh *handle = fh; 707 struct uvc_streaming *stream = handle->stream; 708 709 if (!uvc_has_privileges(handle)) 710 return -EBUSY; 711 712 return uvc_query_buffer(&stream->queue, buf); 713} 714 715static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 716{ 717 struct uvc_fh *handle = fh; 718 struct uvc_streaming *stream = handle->stream; 719 720 if (!uvc_has_privileges(handle)) 721 return -EBUSY; 722 723 return uvc_queue_buffer(&stream->queue, buf); 724} 725 726static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) 727{ 728 struct uvc_fh *handle = fh; 729 struct uvc_streaming *stream = handle->stream; 730 731 if (!uvc_has_privileges(handle)) 732 return -EBUSY; 733 734 return uvc_dequeue_buffer(&stream->queue, buf, 735 file->f_flags & O_NONBLOCK); 736} 737 738static int uvc_ioctl_create_bufs(struct file *file, void *fh, 739 struct v4l2_create_buffers *cb) 740{ 741 struct uvc_fh *handle = fh; 742 struct uvc_streaming *stream = handle->stream; 743 int ret; 744 745 ret = uvc_acquire_privileges(handle); 746 if (ret < 0) 747 return ret; 748 749 return uvc_create_buffers(&stream->queue, cb); 750} 751 752static int uvc_ioctl_streamon(struct file *file, void *fh, 753 enum v4l2_buf_type type) 754{ 755 struct uvc_fh *handle = fh; 756 struct uvc_streaming *stream = handle->stream; 757 int ret; 758 759 if (!uvc_has_privileges(handle)) 760 return -EBUSY; 761 762 mutex_lock(&stream->mutex); 763 ret = uvc_queue_streamon(&stream->queue, type); 764 mutex_unlock(&stream->mutex); 765 766 return ret; 767} 768 769static int uvc_ioctl_streamoff(struct file *file, void *fh, 770 enum v4l2_buf_type type) 771{ 772 struct uvc_fh *handle = fh; 773 struct uvc_streaming *stream = handle->stream; 774 775 if (!uvc_has_privileges(handle)) 776 return -EBUSY; 777 778 mutex_lock(&stream->mutex); 779 uvc_queue_streamoff(&stream->queue, type); 780 mutex_unlock(&stream->mutex); 781 782 return 0; 783} 784 785static int uvc_ioctl_enum_input(struct file *file, void *fh, 786 struct v4l2_input *input) 787{ 788 struct uvc_fh *handle = fh; 789 struct uvc_video_chain *chain = handle->chain; 790 const struct uvc_entity *selector = chain->selector; 791 struct uvc_entity *iterm = NULL; 792 u32 index = input->index; 793 int pin = 0; 794 795 if (selector == NULL || 796 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 797 if (index != 0) 798 return -EINVAL; 799 list_for_each_entry(iterm, &chain->entities, chain) { 800 if (UVC_ENTITY_IS_ITERM(iterm)) 801 break; 802 } 803 pin = iterm->id; 804 } else if (index < selector->bNrInPins) { 805 pin = selector->baSourceID[index]; 806 list_for_each_entry(iterm, &chain->entities, chain) { 807 if (!UVC_ENTITY_IS_ITERM(iterm)) 808 continue; 809 if (iterm->id == pin) 810 break; 811 } 812 } 813 814 if (iterm == NULL || iterm->id != pin) 815 return -EINVAL; 816 817 memset(input, 0, sizeof(*input)); 818 input->index = index; 819 strlcpy(input->name, iterm->name, sizeof(input->name)); 820 if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA) 821 input->type = V4L2_INPUT_TYPE_CAMERA; 822 823 return 0; 824} 825 826static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input) 827{ 828 struct uvc_fh *handle = fh; 829 struct uvc_video_chain *chain = handle->chain; 830 int ret; 831 u8 i; 832 833 if (chain->selector == NULL || 834 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 835 *input = 0; 836 return 0; 837 } 838 839 ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id, 840 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 841 &i, 1); 842 if (ret < 0) 843 return ret; 844 845 *input = i - 1; 846 return 0; 847} 848 849static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input) 850{ 851 struct uvc_fh *handle = fh; 852 struct uvc_video_chain *chain = handle->chain; 853 int ret; 854 u32 i; 855 856 ret = uvc_acquire_privileges(handle); 857 if (ret < 0) 858 return ret; 859 860 if (chain->selector == NULL || 861 (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { 862 if (input) 863 return -EINVAL; 864 return 0; 865 } 866 867 if (input >= chain->selector->bNrInPins) 868 return -EINVAL; 869 870 i = input + 1; 871 return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id, 872 chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL, 873 &i, 1); 874} 875 876static int uvc_ioctl_queryctrl(struct file *file, void *fh, 877 struct v4l2_queryctrl *qc) 878{ 879 struct uvc_fh *handle = fh; 880 struct uvc_video_chain *chain = handle->chain; 881 882 return uvc_query_v4l2_ctrl(chain, qc); 883} 884 885static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh, 886 struct v4l2_query_ext_ctrl *qec) 887{ 888 struct uvc_fh *handle = fh; 889 struct uvc_video_chain *chain = handle->chain; 890 struct v4l2_queryctrl qc = { qec->id }; 891 int ret; 892 893 ret = uvc_query_v4l2_ctrl(chain, &qc); 894 if (ret) 895 return ret; 896 897 qec->id = qc.id; 898 qec->type = qc.type; 899 strlcpy(qec->name, qc.name, sizeof(qec->name)); 900 qec->minimum = qc.minimum; 901 qec->maximum = qc.maximum; 902 qec->step = qc.step; 903 qec->default_value = qc.default_value; 904 qec->flags = qc.flags; 905 qec->elem_size = 4; 906 qec->elems = 1; 907 qec->nr_of_dims = 0; 908 memset(qec->dims, 0, sizeof(qec->dims)); 909 memset(qec->reserved, 0, sizeof(qec->reserved)); 910 911 return 0; 912} 913 914static int uvc_ioctl_g_ctrl(struct file *file, void *fh, 915 struct v4l2_control *ctrl) 916{ 917 struct uvc_fh *handle = fh; 918 struct uvc_video_chain *chain = handle->chain; 919 struct v4l2_ext_control xctrl; 920 int ret; 921 922 memset(&xctrl, 0, sizeof(xctrl)); 923 xctrl.id = ctrl->id; 924 925 ret = uvc_ctrl_begin(chain); 926 if (ret < 0) 927 return ret; 928 929 ret = uvc_ctrl_get(chain, &xctrl); 930 uvc_ctrl_rollback(handle); 931 if (ret < 0) 932 return ret; 933 934 ctrl->value = xctrl.value; 935 return 0; 936} 937 938static int uvc_ioctl_s_ctrl(struct file *file, void *fh, 939 struct v4l2_control *ctrl) 940{ 941 struct uvc_fh *handle = fh; 942 struct uvc_video_chain *chain = handle->chain; 943 struct v4l2_ext_control xctrl; 944 int ret; 945 946 memset(&xctrl, 0, sizeof(xctrl)); 947 xctrl.id = ctrl->id; 948 xctrl.value = ctrl->value; 949 950 ret = uvc_ctrl_begin(chain); 951 if (ret < 0) 952 return ret; 953 954 ret = uvc_ctrl_set(chain, &xctrl); 955 if (ret < 0) { 956 uvc_ctrl_rollback(handle); 957 return ret; 958 } 959 960 ret = uvc_ctrl_commit(handle, &xctrl, 1); 961 if (ret < 0) 962 return ret; 963 964 ctrl->value = xctrl.value; 965 return 0; 966} 967 968static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh, 969 struct v4l2_ext_controls *ctrls) 970{ 971 struct uvc_fh *handle = fh; 972 struct uvc_video_chain *chain = handle->chain; 973 struct v4l2_ext_control *ctrl = ctrls->controls; 974 unsigned int i; 975 int ret; 976 977 ret = uvc_ctrl_begin(chain); 978 if (ret < 0) 979 return ret; 980 981 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 982 ret = uvc_ctrl_get(chain, ctrl); 983 if (ret < 0) { 984 uvc_ctrl_rollback(handle); 985 ctrls->error_idx = i; 986 return ret; 987 } 988 } 989 990 ctrls->error_idx = 0; 991 992 return uvc_ctrl_rollback(handle); 993} 994 995static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle, 996 struct v4l2_ext_controls *ctrls, 997 bool commit) 998{ 999 struct v4l2_ext_control *ctrl = ctrls->controls; 1000 struct uvc_video_chain *chain = handle->chain; 1001 unsigned int i; 1002 int ret; 1003 1004 ret = uvc_ctrl_begin(chain); 1005 if (ret < 0) 1006 return ret; 1007 1008 for (i = 0; i < ctrls->count; ++ctrl, ++i) { 1009 ret = uvc_ctrl_set(chain, ctrl); 1010 if (ret < 0) { 1011 uvc_ctrl_rollback(handle); 1012 ctrls->error_idx = commit ? ctrls->count : i; 1013 return ret; 1014 } 1015 } 1016 1017 ctrls->error_idx = 0; 1018 1019 if (commit) 1020 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count); 1021 else 1022 return uvc_ctrl_rollback(handle); 1023} 1024 1025static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh, 1026 struct v4l2_ext_controls *ctrls) 1027{ 1028 struct uvc_fh *handle = fh; 1029 1030 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true); 1031} 1032 1033static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh, 1034 struct v4l2_ext_controls *ctrls) 1035{ 1036 struct uvc_fh *handle = fh; 1037 1038 return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false); 1039} 1040 1041static int uvc_ioctl_querymenu(struct file *file, void *fh, 1042 struct v4l2_querymenu *qm) 1043{ 1044 struct uvc_fh *handle = fh; 1045 struct uvc_video_chain *chain = handle->chain; 1046 1047 return uvc_query_v4l2_menu(chain, qm); 1048} 1049 1050static int uvc_ioctl_g_selection(struct file *file, void *fh, 1051 struct v4l2_selection *sel) 1052{ 1053 struct uvc_fh *handle = fh; 1054 struct uvc_streaming *stream = handle->stream; 1055 1056 if (sel->type != stream->type) 1057 return -EINVAL; 1058 1059 switch (sel->target) { 1060 case V4L2_SEL_TGT_CROP_DEFAULT: 1061 case V4L2_SEL_TGT_CROP_BOUNDS: 1062 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) 1063 return -EINVAL; 1064 break; 1065 case V4L2_SEL_TGT_COMPOSE_DEFAULT: 1066 case V4L2_SEL_TGT_COMPOSE_BOUNDS: 1067 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1068 return -EINVAL; 1069 break; 1070 default: 1071 return -EINVAL; 1072 } 1073 1074 sel->r.left = 0; 1075 sel->r.top = 0; 1076 mutex_lock(&stream->mutex); 1077 sel->r.width = stream->cur_frame->wWidth; 1078 sel->r.height = stream->cur_frame->wHeight; 1079 mutex_unlock(&stream->mutex); 1080 1081 return 0; 1082} 1083 1084static int uvc_ioctl_g_parm(struct file *file, void *fh, 1085 struct v4l2_streamparm *parm) 1086{ 1087 struct uvc_fh *handle = fh; 1088 struct uvc_streaming *stream = handle->stream; 1089 1090 return uvc_v4l2_get_streamparm(stream, parm); 1091} 1092 1093static int uvc_ioctl_s_parm(struct file *file, void *fh, 1094 struct v4l2_streamparm *parm) 1095{ 1096 struct uvc_fh *handle = fh; 1097 struct uvc_streaming *stream = handle->stream; 1098 int ret; 1099 1100 ret = uvc_acquire_privileges(handle); 1101 if (ret < 0) 1102 return ret; 1103 1104 return uvc_v4l2_set_streamparm(stream, parm); 1105} 1106 1107static int uvc_ioctl_enum_framesizes(struct file *file, void *fh, 1108 struct v4l2_frmsizeenum *fsize) 1109{ 1110 struct uvc_fh *handle = fh; 1111 struct uvc_streaming *stream = handle->stream; 1112 struct uvc_format *format = NULL; 1113 struct uvc_frame *frame; 1114 int i; 1115 1116 /* Look for the given pixel format */ 1117 for (i = 0; i < stream->nformats; i++) { 1118 if (stream->format[i].fcc == fsize->pixel_format) { 1119 format = &stream->format[i]; 1120 break; 1121 } 1122 } 1123 if (format == NULL) 1124 return -EINVAL; 1125 1126 if (fsize->index >= format->nframes) 1127 return -EINVAL; 1128 1129 frame = &format->frame[fsize->index]; 1130 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 1131 fsize->discrete.width = frame->wWidth; 1132 fsize->discrete.height = frame->wHeight; 1133 return 0; 1134} 1135 1136static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh, 1137 struct v4l2_frmivalenum *fival) 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 = NULL; 1143 int i; 1144 1145 /* Look for the given pixel format and frame size */ 1146 for (i = 0; i < stream->nformats; i++) { 1147 if (stream->format[i].fcc == fival->pixel_format) { 1148 format = &stream->format[i]; 1149 break; 1150 } 1151 } 1152 if (format == NULL) 1153 return -EINVAL; 1154 1155 for (i = 0; i < format->nframes; i++) { 1156 if (format->frame[i].wWidth == fival->width && 1157 format->frame[i].wHeight == fival->height) { 1158 frame = &format->frame[i]; 1159 break; 1160 } 1161 } 1162 if (frame == NULL) 1163 return -EINVAL; 1164 1165 if (frame->bFrameIntervalType) { 1166 if (fival->index >= frame->bFrameIntervalType) 1167 return -EINVAL; 1168 1169 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; 1170 fival->discrete.numerator = 1171 frame->dwFrameInterval[fival->index]; 1172 fival->discrete.denominator = 10000000; 1173 uvc_simplify_fraction(&fival->discrete.numerator, 1174 &fival->discrete.denominator, 8, 333); 1175 } else { 1176 if (fival->index) 1177 return -EINVAL; 1178 1179 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; 1180 fival->stepwise.min.numerator = frame->dwFrameInterval[0]; 1181 fival->stepwise.min.denominator = 10000000; 1182 fival->stepwise.max.numerator = frame->dwFrameInterval[1]; 1183 fival->stepwise.max.denominator = 10000000; 1184 fival->stepwise.step.numerator = frame->dwFrameInterval[2]; 1185 fival->stepwise.step.denominator = 10000000; 1186 uvc_simplify_fraction(&fival->stepwise.min.numerator, 1187 &fival->stepwise.min.denominator, 8, 333); 1188 uvc_simplify_fraction(&fival->stepwise.max.numerator, 1189 &fival->stepwise.max.denominator, 8, 333); 1190 uvc_simplify_fraction(&fival->stepwise.step.numerator, 1191 &fival->stepwise.step.denominator, 8, 333); 1192 } 1193 1194 return 0; 1195} 1196 1197static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh, 1198 const struct v4l2_event_subscription *sub) 1199{ 1200 switch (sub->type) { 1201 case V4L2_EVENT_CTRL: 1202 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops); 1203 default: 1204 return -EINVAL; 1205 } 1206} 1207 1208static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio, 1209 unsigned int cmd, void *arg) 1210{ 1211 struct uvc_fh *handle = fh; 1212 struct uvc_video_chain *chain = handle->chain; 1213 1214 switch (cmd) { 1215 /* Dynamic controls. */ 1216 case UVCIOC_CTRL_MAP: 1217 return uvc_ioctl_ctrl_map(chain, arg); 1218 1219 case UVCIOC_CTRL_QUERY: 1220 return uvc_xu_ctrl_query(chain, arg); 1221 1222 default: 1223 return -ENOTTY; 1224 } 1225} 1226 1227#ifdef CONFIG_COMPAT 1228struct uvc_xu_control_mapping32 { 1229 __u32 id; 1230 __u8 name[32]; 1231 __u8 entity[16]; 1232 __u8 selector; 1233 1234 __u8 size; 1235 __u8 offset; 1236 __u32 v4l2_type; 1237 __u32 data_type; 1238 1239 compat_caddr_t menu_info; 1240 __u32 menu_count; 1241 1242 __u32 reserved[4]; 1243}; 1244 1245static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp, 1246 const struct uvc_xu_control_mapping32 __user *up) 1247{ 1248 struct uvc_menu_info __user *umenus; 1249 struct uvc_menu_info __user *kmenus; 1250 compat_caddr_t p; 1251 1252 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 1253 __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) || 1254 __get_user(kp->menu_count, &up->menu_count)) 1255 return -EFAULT; 1256 1257 memset(kp->reserved, 0, sizeof(kp->reserved)); 1258 1259 if (kp->menu_count == 0) { 1260 kp->menu_info = NULL; 1261 return 0; 1262 } 1263 1264 if (__get_user(p, &up->menu_info)) 1265 return -EFAULT; 1266 umenus = compat_ptr(p); 1267 if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus))) 1268 return -EFAULT; 1269 1270 kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus)); 1271 if (kmenus == NULL) 1272 return -EFAULT; 1273 kp->menu_info = kmenus; 1274 1275 if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus))) 1276 return -EFAULT; 1277 1278 return 0; 1279} 1280 1281static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp, 1282 struct uvc_xu_control_mapping32 __user *up) 1283{ 1284 struct uvc_menu_info __user *umenus; 1285 struct uvc_menu_info __user *kmenus = kp->menu_info; 1286 compat_caddr_t p; 1287 1288 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || 1289 __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) || 1290 __put_user(kp->menu_count, &up->menu_count)) 1291 return -EFAULT; 1292 1293 if (__clear_user(up->reserved, sizeof(up->reserved))) 1294 return -EFAULT; 1295 1296 if (kp->menu_count == 0) 1297 return 0; 1298 1299 if (get_user(p, &up->menu_info)) 1300 return -EFAULT; 1301 umenus = compat_ptr(p); 1302 1303 if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus))) 1304 return -EFAULT; 1305 1306 return 0; 1307} 1308 1309struct uvc_xu_control_query32 { 1310 __u8 unit; 1311 __u8 selector; 1312 __u8 query; 1313 __u16 size; 1314 compat_caddr_t data; 1315}; 1316 1317static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp, 1318 const struct uvc_xu_control_query32 __user *up) 1319{ 1320 u8 __user *udata; 1321 u8 __user *kdata; 1322 compat_caddr_t p; 1323 1324 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 1325 __copy_from_user(kp, up, offsetof(typeof(*up), data))) 1326 return -EFAULT; 1327 1328 if (kp->size == 0) { 1329 kp->data = NULL; 1330 return 0; 1331 } 1332 1333 if (__get_user(p, &up->data)) 1334 return -EFAULT; 1335 udata = compat_ptr(p); 1336 if (!access_ok(VERIFY_READ, udata, kp->size)) 1337 return -EFAULT; 1338 1339 kdata = compat_alloc_user_space(kp->size); 1340 if (kdata == NULL) 1341 return -EFAULT; 1342 kp->data = kdata; 1343 1344 if (copy_in_user(kdata, udata, kp->size)) 1345 return -EFAULT; 1346 1347 return 0; 1348} 1349 1350static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp, 1351 struct uvc_xu_control_query32 __user *up) 1352{ 1353 u8 __user *udata; 1354 u8 __user *kdata = kp->data; 1355 compat_caddr_t p; 1356 1357 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) || 1358 __copy_to_user(up, kp, offsetof(typeof(*up), data))) 1359 return -EFAULT; 1360 1361 if (kp->size == 0) 1362 return 0; 1363 1364 if (get_user(p, &up->data)) 1365 return -EFAULT; 1366 udata = compat_ptr(p); 1367 if (!access_ok(VERIFY_READ, udata, kp->size)) 1368 return -EFAULT; 1369 1370 if (copy_in_user(udata, kdata, kp->size)) 1371 return -EFAULT; 1372 1373 return 0; 1374} 1375 1376#define UVCIOC_CTRL_MAP32 _IOWR('u', 0x20, struct uvc_xu_control_mapping32) 1377#define UVCIOC_CTRL_QUERY32 _IOWR('u', 0x21, struct uvc_xu_control_query32) 1378 1379static long uvc_v4l2_compat_ioctl32(struct file *file, 1380 unsigned int cmd, unsigned long arg) 1381{ 1382 struct uvc_fh *handle = file->private_data; 1383 union { 1384 struct uvc_xu_control_mapping xmap; 1385 struct uvc_xu_control_query xqry; 1386 } karg; 1387 void __user *up = compat_ptr(arg); 1388 long ret; 1389 1390 switch (cmd) { 1391 case UVCIOC_CTRL_MAP32: 1392 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up); 1393 if (ret) 1394 return ret; 1395 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap); 1396 if (ret) 1397 return ret; 1398 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up); 1399 if (ret) 1400 return ret; 1401 1402 break; 1403 1404 case UVCIOC_CTRL_QUERY32: 1405 ret = uvc_v4l2_get_xu_query(&karg.xqry, up); 1406 if (ret) 1407 return ret; 1408 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry); 1409 if (ret) 1410 return ret; 1411 ret = uvc_v4l2_put_xu_query(&karg.xqry, up); 1412 if (ret) 1413 return ret; 1414 break; 1415 1416 default: 1417 return -ENOIOCTLCMD; 1418 } 1419 1420 return ret; 1421} 1422#endif 1423 1424static ssize_t uvc_v4l2_read(struct file *file, char __user *data, 1425 size_t count, loff_t *ppos) 1426{ 1427 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); 1428 return -EINVAL; 1429} 1430 1431static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) 1432{ 1433 struct uvc_fh *handle = file->private_data; 1434 struct uvc_streaming *stream = handle->stream; 1435 1436 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); 1437 1438 return uvc_queue_mmap(&stream->queue, vma); 1439} 1440 1441static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) 1442{ 1443 struct uvc_fh *handle = file->private_data; 1444 struct uvc_streaming *stream = handle->stream; 1445 1446 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); 1447 1448 return uvc_queue_poll(&stream->queue, file, wait); 1449} 1450 1451#ifndef CONFIG_MMU 1452static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, 1453 unsigned long addr, unsigned long len, unsigned long pgoff, 1454 unsigned long flags) 1455{ 1456 struct uvc_fh *handle = file->private_data; 1457 struct uvc_streaming *stream = handle->stream; 1458 1459 uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n"); 1460 1461 return uvc_queue_get_unmapped_area(&stream->queue, pgoff); 1462} 1463#endif 1464 1465const struct v4l2_ioctl_ops uvc_ioctl_ops = { 1466 .vidioc_querycap = uvc_ioctl_querycap, 1467 .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap, 1468 .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out, 1469 .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap, 1470 .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out, 1471 .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap, 1472 .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out, 1473 .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap, 1474 .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out, 1475 .vidioc_reqbufs = uvc_ioctl_reqbufs, 1476 .vidioc_querybuf = uvc_ioctl_querybuf, 1477 .vidioc_qbuf = uvc_ioctl_qbuf, 1478 .vidioc_dqbuf = uvc_ioctl_dqbuf, 1479 .vidioc_create_bufs = uvc_ioctl_create_bufs, 1480 .vidioc_streamon = uvc_ioctl_streamon, 1481 .vidioc_streamoff = uvc_ioctl_streamoff, 1482 .vidioc_enum_input = uvc_ioctl_enum_input, 1483 .vidioc_g_input = uvc_ioctl_g_input, 1484 .vidioc_s_input = uvc_ioctl_s_input, 1485 .vidioc_queryctrl = uvc_ioctl_queryctrl, 1486 .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl, 1487 .vidioc_g_ctrl = uvc_ioctl_g_ctrl, 1488 .vidioc_s_ctrl = uvc_ioctl_s_ctrl, 1489 .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls, 1490 .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls, 1491 .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls, 1492 .vidioc_querymenu = uvc_ioctl_querymenu, 1493 .vidioc_g_selection = uvc_ioctl_g_selection, 1494 .vidioc_g_parm = uvc_ioctl_g_parm, 1495 .vidioc_s_parm = uvc_ioctl_s_parm, 1496 .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes, 1497 .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals, 1498 .vidioc_subscribe_event = uvc_ioctl_subscribe_event, 1499 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 1500 .vidioc_default = uvc_ioctl_default, 1501}; 1502 1503const struct v4l2_file_operations uvc_fops = { 1504 .owner = THIS_MODULE, 1505 .open = uvc_v4l2_open, 1506 .release = uvc_v4l2_release, 1507 .unlocked_ioctl = video_ioctl2, 1508#ifdef CONFIG_COMPAT 1509 .compat_ioctl32 = uvc_v4l2_compat_ioctl32, 1510#endif 1511 .read = uvc_v4l2_read, 1512 .mmap = uvc_v4l2_mmap, 1513 .poll = uvc_v4l2_poll, 1514#ifndef CONFIG_MMU 1515 .get_unmapped_area = uvc_v4l2_get_unmapped_area, 1516#endif 1517}; 1518 1519