drivers/media/usb/uvc/uvc_v4l2.c

   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         /* After the probe, update fmt with the values returned from
 246          * negotiation with the device. Some devices return invalid bFormatIndex
 247          * and bFrameIndex values, in which case we can only assume they have
 248          * accepted the requested format as-is.
 249          */
 250         for (i = 0; i < stream->nformats; ++i) {
 251                 if (probe->bFormatIndex == stream->format[i].index) {
 252                         format = &stream->format[i];
 253                         break;
 254                 }
 255         }
 256
 257         if (i == stream->nformats)
 258                 uvc_trace(UVC_TRACE_FORMAT,
 259                           "Unknown bFormatIndex %u, using default\n",
 260                           probe->bFormatIndex);
 261
 262         for (i = 0; i < format->nframes; ++i) {
 263                 if (probe->bFrameIndex == format->frame[i].bFrameIndex) {
 264                         frame = &format->frame[i];
 265                         break;
 266                 }
 267         }
 268
 269         if (i == format->nframes)
 270                 uvc_trace(UVC_TRACE_FORMAT,
 271                           "Unknown bFrameIndex %u, using default\n",
 272                           probe->bFrameIndex);
 273
 274         fmt->fmt.pix.width = frame->wWidth;
 275         fmt->fmt.pix.height = frame->wHeight;
 276         fmt->fmt.pix.field = V4L2_FIELD_NONE;
 277         fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8;
 278         fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
 279         fmt->fmt.pix.pixelformat = format->fcc;
 280         fmt->fmt.pix.colorspace = format->colorspace;
 281         fmt->fmt.pix.priv = 0;
 282
 283         if (uvc_format != NULL)
 284                 *uvc_format = format;
 285         if (uvc_frame != NULL)
 286                 *uvc_frame = frame;
 287
 288 done:
 289         return ret;
 290 }
 291
 292 static int uvc_v4l2_get_format(struct uvc_streaming *stream,
 293         struct v4l2_format *fmt)
 294 {
 295         struct uvc_format *format;
 296         struct uvc_frame *frame;
 297         int ret = 0;
 298
 299         if (fmt->type != stream->type)
 300                 return -EINVAL;
 301
 302         mutex_lock(&stream->mutex);
 303         format = stream->cur_format;
 304         frame = stream->cur_frame;
 305
 306         if (format == NULL || frame == NULL) {
 307                 ret = -EINVAL;
 308                 goto done;
 309         }
 310
 311         fmt->fmt.pix.pixelformat = format->fcc;
 312         fmt->fmt.pix.width = frame->wWidth;
 313         fmt->fmt.pix.height = frame->wHeight;
 314         fmt->fmt.pix.field = V4L2_FIELD_NONE;
 315         fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8;
 316         fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
 317         fmt->fmt.pix.colorspace = format->colorspace;
 318         fmt->fmt.pix.priv = 0;
 319
 320 done:
 321         mutex_unlock(&stream->mutex);
 322         return ret;
 323 }
 324
 325 static int uvc_v4l2_set_format(struct uvc_streaming *stream,
 326         struct v4l2_format *fmt)
 327 {
 328         struct uvc_streaming_control probe;
 329         struct uvc_format *format;
 330         struct uvc_frame *frame;
 331         int ret;
 332
 333         if (fmt->type != stream->type)
 334                 return -EINVAL;
 335
 336         ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
 337         if (ret < 0)
 338                 return ret;
 339
 340         mutex_lock(&stream->mutex);
 341
 342         if (uvc_queue_allocated(&stream->queue)) {
 343                 ret = -EBUSY;
 344                 goto done;
 345         }
 346
 347         stream->ctrl = probe;
 348         stream->cur_format = format;
 349         stream->cur_frame = frame;
 350
 351 done:
 352         mutex_unlock(&stream->mutex);
 353         return ret;
 354 }
 355
 356 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
 357                 struct v4l2_streamparm *parm)
 358 {
 359         uint32_t numerator, denominator;
 360
 361         if (parm->type != stream->type)
 362                 return -EINVAL;
 363
 364         mutex_lock(&stream->mutex);
 365         numerator = stream->ctrl.dwFrameInterval;
 366         mutex_unlock(&stream->mutex);
 367
 368         denominator = 10000000;
 369         uvc_simplify_fraction(&numerator, &denominator, 8, 333);
 370
 371         memset(parm, 0, sizeof *parm);
 372         parm->type = stream->type;
 373
 374         if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 375                 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 376                 parm->parm.capture.capturemode = 0;
 377                 parm->parm.capture.timeperframe.numerator = numerator;
 378                 parm->parm.capture.timeperframe.denominator = denominator;
 379                 parm->parm.capture.extendedmode = 0;
 380                 parm->parm.capture.readbuffers = 0;
 381         } else {
 382                 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 383                 parm->parm.output.outputmode = 0;
 384                 parm->parm.output.timeperframe.numerator = numerator;
 385                 parm->parm.output.timeperframe.denominator = denominator;
 386         }
 387
 388         return 0;
 389 }
 390
 391 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 392                 struct v4l2_streamparm *parm)
 393 {
 394         struct uvc_streaming_control probe;
 395         struct v4l2_fract timeperframe;
 396         uint32_t interval;
 397         int ret;
 398
 399         if (parm->type != stream->type)
 400                 return -EINVAL;
 401
 402         if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 403                 timeperframe = parm->parm.capture.timeperframe;
 404         else
 405                 timeperframe = parm->parm.output.timeperframe;
 406
 407         interval = uvc_fraction_to_interval(timeperframe.numerator,
 408                 timeperframe.denominator);
 409         uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
 410                 timeperframe.numerator, timeperframe.denominator, interval);
 411
 412         mutex_lock(&stream->mutex);
 413
 414         if (uvc_queue_streaming(&stream->queue)) {
 415                 mutex_unlock(&stream->mutex);
 416                 return -EBUSY;
 417         }
 418
 419         probe = stream->ctrl;
 420         probe.dwFrameInterval =
 421                 uvc_try_frame_interval(stream->cur_frame, interval);
 422
 423         /* Probe the device with the new settings. */
 424         ret = uvc_probe_video(stream, &probe);
 425         if (ret < 0) {
 426                 mutex_unlock(&stream->mutex);
 427                 return ret;
 428         }
 429
 430         stream->ctrl = probe;
 431         mutex_unlock(&stream->mutex);
 432
 433         /* Return the actual frame period. */
 434         timeperframe.numerator = probe.dwFrameInterval;
 435         timeperframe.denominator = 10000000;
 436         uvc_simplify_fraction(&timeperframe.numerator,
 437                 &timeperframe.denominator, 8, 333);
 438
 439         if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 440                 parm->parm.capture.timeperframe = timeperframe;
 441         else
 442                 parm->parm.output.timeperframe = timeperframe;
 443
 444         return 0;
 445 }
 446
 447 /* ------------------------------------------------------------------------
 448  * Privilege management
 449  */
 450
 451 /*
 452  * Privilege management is the multiple-open implementation basis. The current
 453  * implementation is completely transparent for the end-user and doesn't
 454  * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
 455  * Those ioctls enable finer control on the device (by making possible for a
 456  * user to request exclusive access to a device), but are not mature yet.
 457  * Switching to the V4L2 priority mechanism might be considered in the future
 458  * if this situation changes.
 459  *
 460  * Each open instance of a UVC device can either be in a privileged or
 461  * unprivileged state. Only a single instance can be in a privileged state at
 462  * a given time. Trying to perform an operation that requires privileges will
 463  * automatically acquire the required privileges if possible, or return -EBUSY
 464  * otherwise. Privileges are dismissed when closing the instance or when
 465  * freeing the video buffers using VIDIOC_REQBUFS.
 466  *
 467  * Operations that require privileges are:
 468  *
 469  * - VIDIOC_S_INPUT
 470  * - VIDIOC_S_PARM
 471  * - VIDIOC_S_FMT
 472  * - VIDIOC_REQBUFS
 473  */
 474 static int uvc_acquire_privileges(struct uvc_fh *handle)
 475 {
 476         /* Always succeed if the handle is already privileged. */
 477         if (handle->state == UVC_HANDLE_ACTIVE)
 478                 return 0;
 479
 480         /* Check if the device already has a privileged handle. */
 481         if (atomic_inc_return(&handle->stream->active) != 1) {
 482                 atomic_dec(&handle->stream->active);
 483                 return -EBUSY;
 484         }
 485
 486         handle->state = UVC_HANDLE_ACTIVE;
 487         return 0;
 488 }
 489
 490 static void uvc_dismiss_privileges(struct uvc_fh *handle)
 491 {
 492         if (handle->state == UVC_HANDLE_ACTIVE)
 493                 atomic_dec(&handle->stream->active);
 494
 495         handle->state = UVC_HANDLE_PASSIVE;
 496 }
 497
 498 static int uvc_has_privileges(struct uvc_fh *handle)
 499 {
 500         return handle->state == UVC_HANDLE_ACTIVE;
 501 }
 502
 503 /* ------------------------------------------------------------------------
 504  * V4L2 file operations
 505  */
 506
 507 static int uvc_v4l2_open(struct file *file)
 508 {
 509         struct uvc_streaming *stream;
 510         struct uvc_fh *handle;
 511         int ret = 0;
 512
 513         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
 514         stream = video_drvdata(file);
 515
 516         ret = usb_autopm_get_interface(stream->dev->intf);
 517         if (ret < 0)
 518                 return ret;
 519
 520         /* Create the device handle. */
 521         handle = kzalloc(sizeof *handle, GFP_KERNEL);
 522         if (handle == NULL) {
 523                 usb_autopm_put_interface(stream->dev->intf);
 524                 return -ENOMEM;
 525         }
 526
 527         mutex_lock(&stream->dev->lock);
 528         if (stream->dev->users == 0) {
 529                 ret = uvc_status_start(stream->dev, GFP_KERNEL);
 530                 if (ret < 0) {
 531                         mutex_unlock(&stream->dev->lock);
 532                         usb_autopm_put_interface(stream->dev->intf);
 533                         kfree(handle);
 534                         return ret;
 535                 }
 536         }
 537
 538         stream->dev->users++;
 539         mutex_unlock(&stream->dev->lock);
 540
 541         v4l2_fh_init(&handle->vfh, &stream->vdev);
 542         v4l2_fh_add(&handle->vfh);
 543         handle->chain = stream->chain;
 544         handle->stream = stream;
 545         handle->state = UVC_HANDLE_PASSIVE;
 546         file->private_data = handle;
 547
 548         return 0;
 549 }
 550
 551 static int uvc_v4l2_release(struct file *file)
 552 {
 553         struct uvc_fh *handle = file->private_data;
 554         struct uvc_streaming *stream = handle->stream;
 555
 556         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n");
 557
 558         /* Only free resources if this is a privileged handle. */
 559         if (uvc_has_privileges(handle))
 560                 uvc_queue_release(&stream->queue);
 561
 562         /* Release the file handle. */
 563         uvc_dismiss_privileges(handle);
 564         v4l2_fh_del(&handle->vfh);
 565         v4l2_fh_exit(&handle->vfh);
 566         kfree(handle);
 567         file->private_data = NULL;
 568
 569         mutex_lock(&stream->dev->lock);
 570         if (--stream->dev->users == 0)
 571                 uvc_status_stop(stream->dev);
 572         mutex_unlock(&stream->dev->lock);
 573
 574         usb_autopm_put_interface(stream->dev->intf);
 575         return 0;
 576 }
 577
 578 static int uvc_ioctl_querycap(struct file *file, void *fh,
 579                               struct v4l2_capability *cap)
 580 {
 581         struct video_device *vdev = video_devdata(file);
 582         struct uvc_fh *handle = file->private_data;
 583         struct uvc_video_chain *chain = handle->chain;
 584         struct uvc_streaming *stream = handle->stream;
 585
 586         strlcpy(cap->driver, "uvcvideo", sizeof(cap->driver));
 587         strlcpy(cap->card, vdev->name, sizeof(cap->card));
 588         usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info));
 589         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 590                           | chain->caps;
 591         if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 592                 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
 593         else
 594                 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
 595
 596         return 0;
 597 }
 598
 599 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
 600                               struct v4l2_fmtdesc *fmt)
 601 {
 602         struct uvc_format *format;
 603         enum v4l2_buf_type type = fmt->type;
 604         __u32 index = fmt->index;
 605
 606         if (fmt->type != stream->type || fmt->index >= stream->nformats)
 607                 return -EINVAL;
 608
 609         memset(fmt, 0, sizeof(*fmt));
 610         fmt->index = index;
 611         fmt->type = type;
 612
 613         format = &stream->format[fmt->index];
 614         fmt->flags = 0;
 615         if (format->flags & UVC_FMT_FLAG_COMPRESSED)
 616                 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
 617         strlcpy(fmt->description, format->name, sizeof(fmt->description));
 618         fmt->description[sizeof(fmt->description) - 1] = 0;
 619         fmt->pixelformat = format->fcc;
 620         return 0;
 621 }
 622
 623 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
 624                                       struct v4l2_fmtdesc *fmt)
 625 {
 626         struct uvc_fh *handle = fh;
 627         struct uvc_streaming *stream = handle->stream;
 628
 629         return uvc_ioctl_enum_fmt(stream, fmt);
 630 }
 631
 632 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
 633                                       struct v4l2_fmtdesc *fmt)
 634 {
 635         struct uvc_fh *handle = fh;
 636         struct uvc_streaming *stream = handle->stream;
 637
 638         return uvc_ioctl_enum_fmt(stream, fmt);
 639 }
 640
 641 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
 642                                    struct v4l2_format *fmt)
 643 {
 644         struct uvc_fh *handle = fh;
 645         struct uvc_streaming *stream = handle->stream;
 646
 647         return uvc_v4l2_get_format(stream, fmt);
 648 }
 649
 650 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
 651                                    struct v4l2_format *fmt)
 652 {
 653         struct uvc_fh *handle = fh;
 654         struct uvc_streaming *stream = handle->stream;
 655
 656         return uvc_v4l2_get_format(stream, fmt);
 657 }
 658
 659 static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
 660                                    struct v4l2_format *fmt)
 661 {
 662         struct uvc_fh *handle = fh;
 663         struct uvc_streaming *stream = handle->stream;
 664         int ret;
 665
 666         ret = uvc_acquire_privileges(handle);
 667         if (ret < 0)
 668                 return ret;
 669
 670         return uvc_v4l2_set_format(stream, fmt);
 671 }
 672
 673 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
 674                                    struct v4l2_format *fmt)
 675 {
 676         struct uvc_fh *handle = fh;
 677         struct uvc_streaming *stream = handle->stream;
 678         int ret;
 679
 680         ret = uvc_acquire_privileges(handle);
 681         if (ret < 0)
 682                 return ret;
 683
 684         return uvc_v4l2_set_format(stream, fmt);
 685 }
 686
 687 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
 688                                      struct v4l2_format *fmt)
 689 {
 690         struct uvc_fh *handle = fh;
 691         struct uvc_streaming *stream = handle->stream;
 692         struct uvc_streaming_control probe;
 693
 694         return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
 695 }
 696
 697 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
 698                                      struct v4l2_format *fmt)
 699 {
 700         struct uvc_fh *handle = fh;
 701         struct uvc_streaming *stream = handle->stream;
 702         struct uvc_streaming_control probe;
 703
 704         return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
 705 }
 706
 707 static int uvc_ioctl_reqbufs(struct file *file, void *fh,
 708                              struct v4l2_requestbuffers *rb)
 709 {
 710         struct uvc_fh *handle = fh;
 711         struct uvc_streaming *stream = handle->stream;
 712         int ret;
 713
 714         ret = uvc_acquire_privileges(handle);
 715         if (ret < 0)
 716                 return ret;
 717
 718         mutex_lock(&stream->mutex);
 719         ret = uvc_request_buffers(&stream->queue, rb);
 720         mutex_unlock(&stream->mutex);
 721         if (ret < 0)
 722                 return ret;
 723
 724         if (ret == 0)
 725                 uvc_dismiss_privileges(handle);
 726
 727         return 0;
 728 }
 729
 730 static int uvc_ioctl_querybuf(struct file *file, void *fh,
 731                               struct v4l2_buffer *buf)
 732 {
 733         struct uvc_fh *handle = fh;
 734         struct uvc_streaming *stream = handle->stream;
 735
 736         if (!uvc_has_privileges(handle))
 737                 return -EBUSY;
 738
 739         return uvc_query_buffer(&stream->queue, buf);
 740 }
 741
 742 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 743 {
 744         struct uvc_fh *handle = fh;
 745         struct uvc_streaming *stream = handle->stream;
 746
 747         if (!uvc_has_privileges(handle))
 748                 return -EBUSY;
 749
 750         return uvc_queue_buffer(&stream->queue, buf);
 751 }
 752
 753 static int uvc_ioctl_expbuf(struct file *file, void *fh,
 754                             struct v4l2_exportbuffer *exp)
 755 {
 756         struct uvc_fh *handle = fh;
 757         struct uvc_streaming *stream = handle->stream;
 758
 759         if (!uvc_has_privileges(handle))
 760                 return -EBUSY;
 761
 762         return uvc_export_buffer(&stream->queue, exp);
 763 }
 764
 765 static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 766 {
 767         struct uvc_fh *handle = fh;
 768         struct uvc_streaming *stream = handle->stream;
 769
 770         if (!uvc_has_privileges(handle))
 771                 return -EBUSY;
 772
 773         return uvc_dequeue_buffer(&stream->queue, buf,
 774                                   file->f_flags & O_NONBLOCK);
 775 }
 776
 777 static int uvc_ioctl_create_bufs(struct file *file, void *fh,
 778                                   struct v4l2_create_buffers *cb)
 779 {
 780         struct uvc_fh *handle = fh;
 781         struct uvc_streaming *stream = handle->stream;
 782         int ret;
 783
 784         ret = uvc_acquire_privileges(handle);
 785         if (ret < 0)
 786                 return ret;
 787
 788         return uvc_create_buffers(&stream->queue, cb);
 789 }
 790
 791 static int uvc_ioctl_streamon(struct file *file, void *fh,
 792                               enum v4l2_buf_type type)
 793 {
 794         struct uvc_fh *handle = fh;
 795         struct uvc_streaming *stream = handle->stream;
 796         int ret;
 797
 798         if (!uvc_has_privileges(handle))
 799                 return -EBUSY;
 800
 801         mutex_lock(&stream->mutex);
 802         ret = uvc_queue_streamon(&stream->queue, type);
 803         mutex_unlock(&stream->mutex);
 804
 805         return ret;
 806 }
 807
 808 static int uvc_ioctl_streamoff(struct file *file, void *fh,
 809                                enum v4l2_buf_type type)
 810 {
 811         struct uvc_fh *handle = fh;
 812         struct uvc_streaming *stream = handle->stream;
 813
 814         if (!uvc_has_privileges(handle))
 815                 return -EBUSY;
 816
 817         mutex_lock(&stream->mutex);
 818         uvc_queue_streamoff(&stream->queue, type);
 819         mutex_unlock(&stream->mutex);
 820
 821         return 0;
 822 }
 823
 824 static int uvc_ioctl_enum_input(struct file *file, void *fh,
 825                                 struct v4l2_input *input)
 826 {
 827         struct uvc_fh *handle = fh;
 828         struct uvc_video_chain *chain = handle->chain;
 829         const struct uvc_entity *selector = chain->selector;
 830         struct uvc_entity *iterm = NULL;
 831         u32 index = input->index;
 832         int pin = 0;
 833
 834         if (selector == NULL ||
 835             (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
 836                 if (index != 0)
 837                         return -EINVAL;
 838                 list_for_each_entry(iterm, &chain->entities, chain) {
 839                         if (UVC_ENTITY_IS_ITERM(iterm))
 840                                 break;
 841                 }
 842                 pin = iterm->id;
 843         } else if (index < selector->bNrInPins) {
 844                 pin = selector->baSourceID[index];
 845                 list_for_each_entry(iterm, &chain->entities, chain) {
 846                         if (!UVC_ENTITY_IS_ITERM(iterm))
 847                                 continue;
 848                         if (iterm->id == pin)
 849                                 break;
 850                 }
 851         }
 852
 853         if (iterm == NULL || iterm->id != pin)
 854                 return -EINVAL;
 855
 856         memset(input, 0, sizeof(*input));
 857         input->index = index;
 858         strlcpy(input->name, iterm->name, sizeof(input->name));
 859         if (UVC_ENTITY_TYPE(iterm) == UVC_ITT_CAMERA)
 860                 input->type = V4L2_INPUT_TYPE_CAMERA;
 861
 862         return 0;
 863 }
 864
 865 static int uvc_ioctl_g_input(struct file *file, void *fh, unsigned int *input)
 866 {
 867         struct uvc_fh *handle = fh;
 868         struct uvc_video_chain *chain = handle->chain;
 869         u8 *buf;
 870         int ret;
 871
 872         if (chain->selector == NULL ||
 873             (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
 874                 *input = 0;
 875                 return 0;
 876         }
 877
 878         buf = kmalloc(1, GFP_KERNEL);
 879         if (!buf)
 880                 return -ENOMEM;
 881
 882         ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
 883                              chain->dev->intfnum,  UVC_SU_INPUT_SELECT_CONTROL,
 884                              buf, 1);
 885         if (!ret)
 886                 *input = *buf - 1;
 887
 888         kfree(buf);
 889
 890         return ret;
 891 }
 892
 893 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
 894 {
 895         struct uvc_fh *handle = fh;
 896         struct uvc_video_chain *chain = handle->chain;
 897         u8 *buf;
 898         int ret;
 899
 900         ret = uvc_acquire_privileges(handle);
 901         if (ret < 0)
 902                 return ret;
 903
 904         if (chain->selector == NULL ||
 905             (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
 906                 if (input)
 907                         return -EINVAL;
 908                 return 0;
 909         }
 910
 911         if (input >= chain->selector->bNrInPins)
 912                 return -EINVAL;
 913
 914         buf = kmalloc(1, GFP_KERNEL);
 915         if (!buf)
 916                 return -ENOMEM;
 917
 918         *buf = input + 1;
 919         ret = uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
 920                              chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
 921                              buf, 1);
 922         kfree(buf);
 923
 924         return ret;
 925 }
 926
 927 static int uvc_ioctl_queryctrl(struct file *file, void *fh,
 928                                struct v4l2_queryctrl *qc)
 929 {
 930         struct uvc_fh *handle = fh;
 931         struct uvc_video_chain *chain = handle->chain;
 932
 933         return uvc_query_v4l2_ctrl(chain, qc);
 934 }
 935
 936 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
 937                                     struct v4l2_query_ext_ctrl *qec)
 938 {
 939         struct uvc_fh *handle = fh;
 940         struct uvc_video_chain *chain = handle->chain;
 941         struct v4l2_queryctrl qc = { qec->id };
 942         int ret;
 943
 944         ret = uvc_query_v4l2_ctrl(chain, &qc);
 945         if (ret)
 946                 return ret;
 947
 948         qec->id = qc.id;
 949         qec->type = qc.type;
 950         strlcpy(qec->name, qc.name, sizeof(qec->name));
 951         qec->minimum = qc.minimum;
 952         qec->maximum = qc.maximum;
 953         qec->step = qc.step;
 954         qec->default_value = qc.default_value;
 955         qec->flags = qc.flags;
 956         qec->elem_size = 4;
 957         qec->elems = 1;
 958         qec->nr_of_dims = 0;
 959         memset(qec->dims, 0, sizeof(qec->dims));
 960         memset(qec->reserved, 0, sizeof(qec->reserved));
 961
 962         return 0;
 963 }
 964
 965 static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
 966                             struct v4l2_control *ctrl)
 967 {
 968         struct uvc_fh *handle = fh;
 969         struct uvc_video_chain *chain = handle->chain;
 970         struct v4l2_ext_control xctrl;
 971         int ret;
 972
 973         memset(&xctrl, 0, sizeof(xctrl));
 974         xctrl.id = ctrl->id;
 975
 976         ret = uvc_ctrl_begin(chain);
 977         if (ret < 0)
 978                 return ret;
 979
 980         ret = uvc_ctrl_get(chain, &xctrl);
 981         uvc_ctrl_rollback(handle);
 982         if (ret < 0)
 983                 return ret;
 984
 985         ctrl->value = xctrl.value;
 986         return 0;
 987 }
 988
 989 static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
 990                             struct v4l2_control *ctrl)
 991 {
 992         struct uvc_fh *handle = fh;
 993         struct uvc_video_chain *chain = handle->chain;
 994         struct v4l2_ext_control xctrl;
 995         int ret;
 996
 997         memset(&xctrl, 0, sizeof(xctrl));
 998         xctrl.id = ctrl->id;
 999         xctrl.value = ctrl->value;
1000
1001         ret = uvc_ctrl_begin(chain);
1002         if (ret < 0)
1003                 return ret;
1004
1005         ret = uvc_ctrl_set(chain, &xctrl);
1006         if (ret < 0) {
1007                 uvc_ctrl_rollback(handle);
1008                 return ret;
1009         }
1010
1011         ret = uvc_ctrl_commit(handle, &xctrl, 1);
1012         if (ret < 0)
1013                 return ret;
1014
1015         ctrl->value = xctrl.value;
1016         return 0;
1017 }
1018
1019 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
1020                                  struct v4l2_ext_controls *ctrls)
1021 {
1022         struct uvc_fh *handle = fh;
1023         struct uvc_video_chain *chain = handle->chain;
1024         struct v4l2_ext_control *ctrl = ctrls->controls;
1025         unsigned int i;
1026         int ret;
1027
1028         ret = uvc_ctrl_begin(chain);
1029         if (ret < 0)
1030                 return ret;
1031
1032         for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1033                 ret = uvc_ctrl_get(chain, ctrl);
1034                 if (ret < 0) {
1035                         uvc_ctrl_rollback(handle);
1036                         ctrls->error_idx = i;
1037                         return ret;
1038                 }
1039         }
1040
1041         ctrls->error_idx = 0;
1042
1043         return uvc_ctrl_rollback(handle);
1044 }
1045
1046 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
1047                                      struct v4l2_ext_controls *ctrls,
1048                                      bool commit)
1049 {
1050         struct v4l2_ext_control *ctrl = ctrls->controls;
1051         struct uvc_video_chain *chain = handle->chain;
1052         unsigned int i;
1053         int ret;
1054
1055         ret = uvc_ctrl_begin(chain);
1056         if (ret < 0)
1057                 return ret;
1058
1059         for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1060                 ret = uvc_ctrl_set(chain, ctrl);
1061                 if (ret < 0) {
1062                         uvc_ctrl_rollback(handle);
1063                         ctrls->error_idx = commit ? ctrls->count : i;
1064                         return ret;
1065                 }
1066         }
1067
1068         ctrls->error_idx = 0;
1069
1070         if (commit)
1071                 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
1072         else
1073                 return uvc_ctrl_rollback(handle);
1074 }
1075
1076 static int uvc_ioctl_s_ext_ctrls(struct file *file, void *fh,
1077                                  struct v4l2_ext_controls *ctrls)
1078 {
1079         struct uvc_fh *handle = fh;
1080
1081         return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);
1082 }
1083
1084 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
1085                                    struct v4l2_ext_controls *ctrls)
1086 {
1087         struct uvc_fh *handle = fh;
1088
1089         return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
1090 }
1091
1092 static int uvc_ioctl_querymenu(struct file *file, void *fh,
1093                                struct v4l2_querymenu *qm)
1094 {
1095         struct uvc_fh *handle = fh;
1096         struct uvc_video_chain *chain = handle->chain;
1097
1098         return uvc_query_v4l2_menu(chain, qm);
1099 }
1100
1101 static int uvc_ioctl_g_selection(struct file *file, void *fh,
1102                                  struct v4l2_selection *sel)
1103 {
1104         struct uvc_fh *handle = fh;
1105         struct uvc_streaming *stream = handle->stream;
1106
1107         if (sel->type != stream->type)
1108                 return -EINVAL;
1109
1110         switch (sel->target) {
1111         case V4L2_SEL_TGT_CROP_DEFAULT:
1112         case V4L2_SEL_TGT_CROP_BOUNDS:
1113                 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1114                         return -EINVAL;
1115                 break;
1116         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1117         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1118                 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1119                         return -EINVAL;
1120                 break;
1121         default:
1122                 return -EINVAL;
1123         }
1124
1125         sel->r.left = 0;
1126         sel->r.top = 0;
1127         mutex_lock(&stream->mutex);
1128         sel->r.width = stream->cur_frame->wWidth;
1129         sel->r.height = stream->cur_frame->wHeight;
1130         mutex_unlock(&stream->mutex);
1131
1132         return 0;
1133 }
1134
1135 static int uvc_ioctl_g_parm(struct file *file, void *fh,
1136                             struct v4l2_streamparm *parm)
1137 {
1138         struct uvc_fh *handle = fh;
1139         struct uvc_streaming *stream = handle->stream;
1140
1141         return uvc_v4l2_get_streamparm(stream, parm);
1142 }
1143
1144 static int uvc_ioctl_s_parm(struct file *file, void *fh,
1145                             struct v4l2_streamparm *parm)
1146 {
1147         struct uvc_fh *handle = fh;
1148         struct uvc_streaming *stream = handle->stream;
1149         int ret;
1150
1151         ret = uvc_acquire_privileges(handle);
1152         if (ret < 0)
1153                 return ret;
1154
1155         return uvc_v4l2_set_streamparm(stream, parm);
1156 }
1157
1158 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
1159                                      struct v4l2_frmsizeenum *fsize)
1160 {
1161         struct uvc_fh *handle = fh;
1162         struct uvc_streaming *stream = handle->stream;
1163         struct uvc_format *format = NULL;
1164         struct uvc_frame *frame;
1165         int i;
1166
1167         /* Look for the given pixel format */
1168         for (i = 0; i < stream->nformats; i++) {
1169                 if (stream->format[i].fcc == fsize->pixel_format) {
1170                         format = &stream->format[i];
1171                         break;
1172                 }
1173         }
1174         if (format == NULL)
1175                 return -EINVAL;
1176
1177         if (fsize->index >= format->nframes)
1178                 return -EINVAL;
1179
1180         frame = &format->frame[fsize->index];
1181         fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1182         fsize->discrete.width = frame->wWidth;
1183         fsize->discrete.height = frame->wHeight;
1184         return 0;
1185 }
1186
1187 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh,
1188                                          struct v4l2_frmivalenum *fival)
1189 {
1190         struct uvc_fh *handle = fh;
1191         struct uvc_streaming *stream = handle->stream;
1192         struct uvc_format *format = NULL;
1193         struct uvc_frame *frame = NULL;
1194         int i;
1195
1196         /* Look for the given pixel format and frame size */
1197         for (i = 0; i < stream->nformats; i++) {
1198                 if (stream->format[i].fcc == fival->pixel_format) {
1199                         format = &stream->format[i];
1200                         break;
1201                 }
1202         }
1203         if (format == NULL)
1204                 return -EINVAL;
1205
1206         for (i = 0; i < format->nframes; i++) {
1207                 if (format->frame[i].wWidth == fival->width &&
1208                     format->frame[i].wHeight == fival->height) {
1209                         frame = &format->frame[i];
1210                         break;
1211                 }
1212         }
1213         if (frame == NULL)
1214                 return -EINVAL;
1215
1216         if (frame->bFrameIntervalType) {
1217                 if (fival->index >= frame->bFrameIntervalType)
1218                         return -EINVAL;
1219
1220                 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1221                 fival->discrete.numerator =
1222                         frame->dwFrameInterval[fival->index];
1223                 fival->discrete.denominator = 10000000;
1224                 uvc_simplify_fraction(&fival->discrete.numerator,
1225                         &fival->discrete.denominator, 8, 333);
1226         } else {
1227                 if (fival->index)
1228                         return -EINVAL;
1229
1230                 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
1231                 fival->stepwise.min.numerator = frame->dwFrameInterval[0];
1232                 fival->stepwise.min.denominator = 10000000;
1233                 fival->stepwise.max.numerator = frame->dwFrameInterval[1];
1234                 fival->stepwise.max.denominator = 10000000;
1235                 fival->stepwise.step.numerator = frame->dwFrameInterval[2];
1236                 fival->stepwise.step.denominator = 10000000;
1237                 uvc_simplify_fraction(&fival->stepwise.min.numerator,
1238                         &fival->stepwise.min.denominator, 8, 333);
1239                 uvc_simplify_fraction(&fival->stepwise.max.numerator,
1240                         &fival->stepwise.max.denominator, 8, 333);
1241                 uvc_simplify_fraction(&fival->stepwise.step.numerator,
1242                         &fival->stepwise.step.denominator, 8, 333);
1243         }
1244
1245         return 0;
1246 }
1247
1248 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh,
1249                                      const struct v4l2_event_subscription *sub)
1250 {
1251         switch (sub->type) {
1252         case V4L2_EVENT_CTRL:
1253                 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops);
1254         default:
1255                 return -EINVAL;
1256         }
1257 }
1258
1259 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
1260                               unsigned int cmd, void *arg)
1261 {
1262         struct uvc_fh *handle = fh;
1263         struct uvc_video_chain *chain = handle->chain;
1264
1265         switch (cmd) {
1266         /* Dynamic controls. */
1267         case UVCIOC_CTRL_MAP:
1268                 return uvc_ioctl_ctrl_map(chain, arg);
1269
1270         case UVCIOC_CTRL_QUERY:
1271                 return uvc_xu_ctrl_query(chain, arg);
1272
1273         default:
1274                 return -ENOTTY;
1275         }
1276 }
1277
1278 #ifdef CONFIG_COMPAT
1279 struct uvc_xu_control_mapping32 {
1280         __u32 id;
1281         __u8 name[32];
1282         __u8 entity[16];
1283         __u8 selector;
1284
1285         __u8 size;
1286         __u8 offset;
1287         __u32 v4l2_type;
1288         __u32 data_type;
1289
1290         compat_caddr_t menu_info;
1291         __u32 menu_count;
1292
1293         __u32 reserved[4];
1294 };
1295
1296 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
1297                         const struct uvc_xu_control_mapping32 __user *up)
1298 {
1299         struct uvc_menu_info __user *umenus;
1300         struct uvc_menu_info __user *kmenus;
1301         compat_caddr_t p;
1302
1303         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
1304             __copy_from_user(kp, up, offsetof(typeof(*up), menu_info)) ||
1305             __get_user(kp->menu_count, &up->menu_count))
1306                 return -EFAULT;
1307
1308         memset(kp->reserved, 0, sizeof(kp->reserved));
1309
1310         if (kp->menu_count == 0) {
1311                 kp->menu_info = NULL;
1312                 return 0;
1313         }
1314
1315         if (__get_user(p, &up->menu_info))
1316                 return -EFAULT;
1317         umenus = compat_ptr(p);
1318         if (!access_ok(VERIFY_READ, umenus, kp->menu_count * sizeof(*umenus)))
1319                 return -EFAULT;
1320
1321         kmenus = compat_alloc_user_space(kp->menu_count * sizeof(*kmenus));
1322         if (kmenus == NULL)
1323                 return -EFAULT;
1324         kp->menu_info = kmenus;
1325
1326         if (copy_in_user(kmenus, umenus, kp->menu_count * sizeof(*umenus)))
1327                 return -EFAULT;
1328
1329         return 0;
1330 }
1331
1332 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
1333                         struct uvc_xu_control_mapping32 __user *up)
1334 {
1335         struct uvc_menu_info __user *umenus;
1336         struct uvc_menu_info __user *kmenus = kp->menu_info;
1337         compat_caddr_t p;
1338
1339         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
1340             __copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
1341             __put_user(kp->menu_count, &up->menu_count))
1342                 return -EFAULT;
1343
1344         if (__clear_user(up->reserved, sizeof(up->reserved)))
1345                 return -EFAULT;
1346
1347         if (kp->menu_count == 0)
1348                 return 0;
1349
1350         if (get_user(p, &up->menu_info))
1351                 return -EFAULT;
1352         umenus = compat_ptr(p);
1353
1354         if (copy_in_user(umenus, kmenus, kp->menu_count * sizeof(*umenus)))
1355                 return -EFAULT;
1356
1357         return 0;
1358 }
1359
1360 struct uvc_xu_control_query32 {
1361         __u8 unit;
1362         __u8 selector;
1363         __u8 query;
1364         __u16 size;
1365         compat_caddr_t data;
1366 };
1367
1368 static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
1369                         const struct uvc_xu_control_query32 __user *up)
1370 {
1371         u8 __user *udata;
1372         u8 __user *kdata;
1373         compat_caddr_t p;
1374
1375         if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
1376             __copy_from_user(kp, up, offsetof(typeof(*up), data)))
1377                 return -EFAULT;
1378
1379         if (kp->size == 0) {
1380                 kp->data = NULL;
1381                 return 0;
1382         }
1383
1384         if (__get_user(p, &up->data))
1385                 return -EFAULT;
1386         udata = compat_ptr(p);
1387         if (!access_ok(VERIFY_READ, udata, kp->size))
1388                 return -EFAULT;
1389
1390         kdata = compat_alloc_user_space(kp->size);
1391         if (kdata == NULL)
1392                 return -EFAULT;
1393         kp->data = kdata;
1394
1395         if (copy_in_user(kdata, udata, kp->size))
1396                 return -EFAULT;
1397
1398         return 0;
1399 }
1400
1401 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
1402                         struct uvc_xu_control_query32 __user *up)
1403 {
1404         u8 __user *udata;
1405         u8 __user *kdata = kp->data;
1406         compat_caddr_t p;
1407
1408         if (!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
1409             __copy_to_user(up, kp, offsetof(typeof(*up), data)))
1410                 return -EFAULT;
1411
1412         if (kp->size == 0)
1413                 return 0;
1414
1415         if (get_user(p, &up->data))
1416                 return -EFAULT;
1417         udata = compat_ptr(p);
1418         if (!access_ok(VERIFY_READ, udata, kp->size))
1419                 return -EFAULT;
1420
1421         if (copy_in_user(udata, kdata, kp->size))
1422                 return -EFAULT;
1423
1424         return 0;
1425 }
1426
1427 #define UVCIOC_CTRL_MAP32       _IOWR('u', 0x20, struct uvc_xu_control_mapping32)
1428 #define UVCIOC_CTRL_QUERY32     _IOWR('u', 0x21, struct uvc_xu_control_query32)
1429
1430 static long uvc_v4l2_compat_ioctl32(struct file *file,
1431                      unsigned int cmd, unsigned long arg)
1432 {
1433         struct uvc_fh *handle = file->private_data;
1434         union {
1435                 struct uvc_xu_control_mapping xmap;
1436                 struct uvc_xu_control_query xqry;
1437         } karg;
1438         void __user *up = compat_ptr(arg);
1439         long ret;
1440
1441         switch (cmd) {
1442         case UVCIOC_CTRL_MAP32:
1443                 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
1444                 if (ret)
1445                         return ret;
1446                 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
1447                 if (ret)
1448                         return ret;
1449                 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
1450                 if (ret)
1451                         return ret;
1452
1453                 break;
1454
1455         case UVCIOC_CTRL_QUERY32:
1456                 ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
1457                 if (ret)
1458                         return ret;
1459                 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);
1460                 if (ret)
1461                         return ret;
1462                 ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
1463                 if (ret)
1464                         return ret;
1465                 break;
1466
1467         default:
1468                 return -ENOIOCTLCMD;
1469         }
1470
1471         return ret;
1472 }
1473 #endif
1474
1475 static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
1476                     size_t count, loff_t *ppos)
1477 {
1478         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n");
1479         return -EINVAL;
1480 }
1481
1482 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1483 {
1484         struct uvc_fh *handle = file->private_data;
1485         struct uvc_streaming *stream = handle->stream;
1486
1487         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
1488
1489         return uvc_queue_mmap(&stream->queue, vma);
1490 }
1491
1492 static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait)
1493 {
1494         struct uvc_fh *handle = file->private_data;
1495         struct uvc_streaming *stream = handle->stream;
1496
1497         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
1498
1499         return uvc_queue_poll(&stream->queue, file, wait);
1500 }
1501
1502 #ifndef CONFIG_MMU
1503 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
1504                 unsigned long addr, unsigned long len, unsigned long pgoff,
1505                 unsigned long flags)
1506 {
1507         struct uvc_fh *handle = file->private_data;
1508         struct uvc_streaming *stream = handle->stream;
1509
1510         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n");
1511
1512         return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
1513 }
1514 #endif
1515
1516 const struct v4l2_ioctl_ops uvc_ioctl_ops = {
1517         .vidioc_querycap = uvc_ioctl_querycap,
1518         .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
1519         .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
1520         .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
1521         .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
1522         .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
1523         .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
1524         .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
1525         .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
1526         .vidioc_reqbufs = uvc_ioctl_reqbufs,
1527         .vidioc_querybuf = uvc_ioctl_querybuf,
1528         .vidioc_qbuf = uvc_ioctl_qbuf,
1529         .vidioc_expbuf = uvc_ioctl_expbuf,
1530         .vidioc_dqbuf = uvc_ioctl_dqbuf,
1531         .vidioc_create_bufs = uvc_ioctl_create_bufs,
1532         .vidioc_streamon = uvc_ioctl_streamon,
1533         .vidioc_streamoff = uvc_ioctl_streamoff,
1534         .vidioc_enum_input = uvc_ioctl_enum_input,
1535         .vidioc_g_input = uvc_ioctl_g_input,
1536         .vidioc_s_input = uvc_ioctl_s_input,
1537         .vidioc_queryctrl = uvc_ioctl_queryctrl,
1538         .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
1539         .vidioc_g_ctrl = uvc_ioctl_g_ctrl,
1540         .vidioc_s_ctrl = uvc_ioctl_s_ctrl,
1541         .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,
1542         .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls,
1543         .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
1544         .vidioc_querymenu = uvc_ioctl_querymenu,
1545         .vidioc_g_selection = uvc_ioctl_g_selection,
1546         .vidioc_g_parm = uvc_ioctl_g_parm,
1547         .vidioc_s_parm = uvc_ioctl_s_parm,
1548         .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
1549         .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
1550         .vidioc_subscribe_event = uvc_ioctl_subscribe_event,
1551         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1552         .vidioc_default = uvc_ioctl_default,
1553 };
1554
1555 const struct v4l2_file_operations uvc_fops = {
1556         .owner          = THIS_MODULE,
1557         .open           = uvc_v4l2_open,
1558         .release        = uvc_v4l2_release,
1559         .unlocked_ioctl = video_ioctl2,
1560 #ifdef CONFIG_COMPAT
1561         .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
1562 #endif
1563         .read           = uvc_v4l2_read,
1564         .mmap           = uvc_v4l2_mmap,
1565         .poll           = uvc_v4l2_poll,
1566 #ifndef CONFIG_MMU
1567         .get_unmapped_area = uvc_v4l2_get_unmapped_area,
1568 #endif
1569 };
1570