drivers/media/usb/uvc/uvc_v4l2.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *      uvc_v4l2.c  --  USB Video Class driver - V4L2 API
   4  *
   5  *      Copyright (C) 2005-2010
   6  *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  */
   8
   9 #include <linux/compat.h>
  10 #include <linux/kernel.h>
  11 #include <linux/list.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/usb.h>
  15 #include <linux/videodev2.h>
  16 #include <linux/vmalloc.h>
  17 #include <linux/mm.h>
  18 #include <linux/wait.h>
  19 #include <linux/atomic.h>
  20
  21 #include <media/v4l2-common.h>
  22 #include <media/v4l2-ctrls.h>
  23 #include <media/v4l2-event.h>
  24 #include <media/v4l2-ioctl.h>
  25
  26 #include "uvcvideo.h"
  27
  28 /* ------------------------------------------------------------------------
  29  * UVC ioctls
  30  */
  31 static int uvc_ioctl_ctrl_map(struct uvc_video_chain *chain,
  32         struct uvc_xu_control_mapping *xmap)
  33 {
  34         struct uvc_control_mapping *map;
  35         unsigned int size;
  36         int ret;
  37
  38         map = kzalloc(sizeof(*map), GFP_KERNEL);
  39         if (map == NULL)
  40                 return -ENOMEM;
  41
  42         map->id = xmap->id;
  43         memcpy(map->name, xmap->name, sizeof(map->name));
  44         memcpy(map->entity, xmap->entity, sizeof(map->entity));
  45         map->selector = xmap->selector;
  46         map->size = xmap->size;
  47         map->offset = xmap->offset;
  48         map->v4l2_type = xmap->v4l2_type;
  49         map->data_type = xmap->data_type;
  50
  51         switch (xmap->v4l2_type) {
  52         case V4L2_CTRL_TYPE_INTEGER:
  53         case V4L2_CTRL_TYPE_BOOLEAN:
  54         case V4L2_CTRL_TYPE_BUTTON:
  55                 break;
  56
  57         case V4L2_CTRL_TYPE_MENU:
  58                 /* Prevent excessive memory consumption, as well as integer
  59                  * overflows.
  60                  */
  61                 if (xmap->menu_count == 0 ||
  62                     xmap->menu_count > UVC_MAX_CONTROL_MENU_ENTRIES) {
  63                         ret = -EINVAL;
  64                         goto free_map;
  65                 }
  66
  67                 size = xmap->menu_count * sizeof(*map->menu_info);
  68                 map->menu_info = memdup_user(xmap->menu_info, size);
  69                 if (IS_ERR(map->menu_info)) {
  70                         ret = PTR_ERR(map->menu_info);
  71                         goto free_map;
  72                 }
  73
  74                 map->menu_count = xmap->menu_count;
  75                 break;
  76
  77         default:
  78                 uvc_trace(UVC_TRACE_CONTROL, "Unsupported V4L2 control type "
  79                           "%u.\n", xmap->v4l2_type);
  80                 ret = -ENOTTY;
  81                 goto free_map;
  82         }
  83
  84         ret = uvc_ctrl_add_mapping(chain, map);
  85
  86         kfree(map->menu_info);
  87 free_map:
  88         kfree(map);
  89
  90         return ret;
  91 }
  92
  93 /* ------------------------------------------------------------------------
  94  * V4L2 interface
  95  */
  96
  97 /*
  98  * Find the frame interval closest to the requested frame interval for the
  99  * given frame format and size. This should be done by the device as part of
 100  * the Video Probe and Commit negotiation, but some hardware don't implement
 101  * that feature.
 102  */
 103 static u32 uvc_try_frame_interval(struct uvc_frame *frame, u32 interval)
 104 {
 105         unsigned int i;
 106
 107         if (frame->bFrameIntervalType) {
 108                 u32 best = -1, dist;
 109
 110                 for (i = 0; i < frame->bFrameIntervalType; ++i) {
 111                         dist = interval > frame->dwFrameInterval[i]
 112                              ? interval - frame->dwFrameInterval[i]
 113                              : frame->dwFrameInterval[i] - interval;
 114
 115                         if (dist > best)
 116                                 break;
 117
 118                         best = dist;
 119                 }
 120
 121                 interval = frame->dwFrameInterval[i-1];
 122         } else {
 123                 const u32 min = frame->dwFrameInterval[0];
 124                 const u32 max = frame->dwFrameInterval[1];
 125                 const u32 step = frame->dwFrameInterval[2];
 126
 127                 interval = min + (interval - min + step/2) / step * step;
 128                 if (interval > max)
 129                         interval = max;
 130         }
 131
 132         return interval;
 133 }
 134
 135 static u32 uvc_v4l2_get_bytesperline(const struct uvc_format *format,
 136         const struct uvc_frame *frame)
 137 {
 138         switch (format->fcc) {
 139         case V4L2_PIX_FMT_NV12:
 140         case V4L2_PIX_FMT_YVU420:
 141         case V4L2_PIX_FMT_YUV420:
 142         case V4L2_PIX_FMT_M420:
 143                 return frame->wWidth;
 144
 145         default:
 146                 return format->bpp * frame->wWidth / 8;
 147         }
 148 }
 149
 150 static int uvc_v4l2_try_format(struct uvc_streaming *stream,
 151         struct v4l2_format *fmt, struct uvc_streaming_control *probe,
 152         struct uvc_format **uvc_format, struct uvc_frame **uvc_frame)
 153 {
 154         struct uvc_format *format = NULL;
 155         struct uvc_frame *frame = NULL;
 156         u16 rw, rh;
 157         unsigned int d, maxd;
 158         unsigned int i;
 159         u32 interval;
 160         int ret = 0;
 161         u8 *fcc;
 162
 163         if (fmt->type != stream->type)
 164                 return -EINVAL;
 165
 166         fcc = (u8 *)&fmt->fmt.pix.pixelformat;
 167         uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n",
 168                         fmt->fmt.pix.pixelformat,
 169                         fcc[0], fcc[1], fcc[2], fcc[3],
 170                         fmt->fmt.pix.width, fmt->fmt.pix.height);
 171
 172         /* Check if the hardware supports the requested format, use the default
 173          * format otherwise.
 174          */
 175         for (i = 0; i < stream->nformats; ++i) {
 176                 format = &stream->format[i];
 177                 if (format->fcc == fmt->fmt.pix.pixelformat)
 178                         break;
 179         }
 180
 181         if (i == stream->nformats) {
 182                 format = stream->def_format;
 183                 fmt->fmt.pix.pixelformat = format->fcc;
 184         }
 185
 186         /* Find the closest image size. The distance between image sizes is
 187          * the size in pixels of the non-overlapping regions between the
 188          * requested size and the frame-specified size.
 189          */
 190         rw = fmt->fmt.pix.width;
 191         rh = fmt->fmt.pix.height;
 192         maxd = (unsigned int)-1;
 193
 194         for (i = 0; i < format->nframes; ++i) {
 195                 u16 w = format->frame[i].wWidth;
 196                 u16 h = format->frame[i].wHeight;
 197
 198                 d = min(w, rw) * min(h, rh);
 199                 d = w*h + rw*rh - 2*d;
 200                 if (d < maxd) {
 201                         maxd = d;
 202                         frame = &format->frame[i];
 203                 }
 204
 205                 if (maxd == 0)
 206                         break;
 207         }
 208
 209         if (frame == NULL) {
 210                 uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n",
 211                                 fmt->fmt.pix.width, fmt->fmt.pix.height);
 212                 return -EINVAL;
 213         }
 214
 215         /* Use the default frame interval. */
 216         interval = frame->dwDefaultFrameInterval;
 217         uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us "
 218                 "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval,
 219                 (100000000/interval)%10);
 220
 221         /* Set the format index, frame index and frame interval. */
 222         memset(probe, 0, sizeof(*probe));
 223         probe->bmHint = 1;      /* dwFrameInterval */
 224         probe->bFormatIndex = format->index;
 225         probe->bFrameIndex = frame->bFrameIndex;
 226         probe->dwFrameInterval = uvc_try_frame_interval(frame, interval);
 227         /* Some webcams stall the probe control set request when the
 228          * dwMaxVideoFrameSize field is set to zero. The UVC specification
 229          * clearly states that the field is read-only from the host, so this
 230          * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by
 231          * the webcam to work around the problem.
 232          *
 233          * The workaround could probably be enabled for all webcams, so the
 234          * quirk can be removed if needed. It's currently useful to detect
 235          * webcam bugs and fix them before they hit the market (providing
 236          * developers test their webcams with the Linux driver as well as with
 237          * the Windows driver).
 238          */
 239         mutex_lock(&stream->mutex);
 240         if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS)
 241                 probe->dwMaxVideoFrameSize =
 242                         stream->ctrl.dwMaxVideoFrameSize;
 243
 244         /* Probe the device. */
 245         ret = uvc_probe_video(stream, probe);
 246         mutex_unlock(&stream->mutex);
 247         if (ret < 0)
 248                 goto done;
 249
 250         fmt->fmt.pix.width = frame->wWidth;
 251         fmt->fmt.pix.height = frame->wHeight;
 252         fmt->fmt.pix.field = V4L2_FIELD_NONE;
 253         fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
 254         fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize;
 255         fmt->fmt.pix.colorspace = format->colorspace;
 256         fmt->fmt.pix.priv = 0;
 257
 258         if (uvc_format != NULL)
 259                 *uvc_format = format;
 260         if (uvc_frame != NULL)
 261                 *uvc_frame = frame;
 262
 263 done:
 264         return ret;
 265 }
 266
 267 static int uvc_v4l2_get_format(struct uvc_streaming *stream,
 268         struct v4l2_format *fmt)
 269 {
 270         struct uvc_format *format;
 271         struct uvc_frame *frame;
 272         int ret = 0;
 273
 274         if (fmt->type != stream->type)
 275                 return -EINVAL;
 276
 277         mutex_lock(&stream->mutex);
 278         format = stream->cur_format;
 279         frame = stream->cur_frame;
 280
 281         if (format == NULL || frame == NULL) {
 282                 ret = -EINVAL;
 283                 goto done;
 284         }
 285
 286         fmt->fmt.pix.pixelformat = format->fcc;
 287         fmt->fmt.pix.width = frame->wWidth;
 288         fmt->fmt.pix.height = frame->wHeight;
 289         fmt->fmt.pix.field = V4L2_FIELD_NONE;
 290         fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame);
 291         fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize;
 292         fmt->fmt.pix.colorspace = format->colorspace;
 293         fmt->fmt.pix.priv = 0;
 294
 295 done:
 296         mutex_unlock(&stream->mutex);
 297         return ret;
 298 }
 299
 300 static int uvc_v4l2_set_format(struct uvc_streaming *stream,
 301         struct v4l2_format *fmt)
 302 {
 303         struct uvc_streaming_control probe;
 304         struct uvc_format *format;
 305         struct uvc_frame *frame;
 306         int ret;
 307
 308         if (fmt->type != stream->type)
 309                 return -EINVAL;
 310
 311         ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame);
 312         if (ret < 0)
 313                 return ret;
 314
 315         mutex_lock(&stream->mutex);
 316
 317         if (uvc_queue_allocated(&stream->queue)) {
 318                 ret = -EBUSY;
 319                 goto done;
 320         }
 321
 322         stream->ctrl = probe;
 323         stream->cur_format = format;
 324         stream->cur_frame = frame;
 325
 326 done:
 327         mutex_unlock(&stream->mutex);
 328         return ret;
 329 }
 330
 331 static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream,
 332                 struct v4l2_streamparm *parm)
 333 {
 334         u32 numerator, denominator;
 335
 336         if (parm->type != stream->type)
 337                 return -EINVAL;
 338
 339         mutex_lock(&stream->mutex);
 340         numerator = stream->ctrl.dwFrameInterval;
 341         mutex_unlock(&stream->mutex);
 342
 343         denominator = 10000000;
 344         uvc_simplify_fraction(&numerator, &denominator, 8, 333);
 345
 346         memset(parm, 0, sizeof(*parm));
 347         parm->type = stream->type;
 348
 349         if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 350                 parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
 351                 parm->parm.capture.capturemode = 0;
 352                 parm->parm.capture.timeperframe.numerator = numerator;
 353                 parm->parm.capture.timeperframe.denominator = denominator;
 354                 parm->parm.capture.extendedmode = 0;
 355                 parm->parm.capture.readbuffers = 0;
 356         } else {
 357                 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
 358                 parm->parm.output.outputmode = 0;
 359                 parm->parm.output.timeperframe.numerator = numerator;
 360                 parm->parm.output.timeperframe.denominator = denominator;
 361         }
 362
 363         return 0;
 364 }
 365
 366 static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream,
 367                 struct v4l2_streamparm *parm)
 368 {
 369         struct uvc_streaming_control probe;
 370         struct v4l2_fract timeperframe;
 371         struct uvc_format *format;
 372         struct uvc_frame *frame;
 373         u32 interval, maxd;
 374         unsigned int i;
 375         int ret;
 376
 377         if (parm->type != stream->type)
 378                 return -EINVAL;
 379
 380         if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 381                 timeperframe = parm->parm.capture.timeperframe;
 382         else
 383                 timeperframe = parm->parm.output.timeperframe;
 384
 385         interval = uvc_fraction_to_interval(timeperframe.numerator,
 386                 timeperframe.denominator);
 387         uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n",
 388                 timeperframe.numerator, timeperframe.denominator, interval);
 389
 390         mutex_lock(&stream->mutex);
 391
 392         if (uvc_queue_streaming(&stream->queue)) {
 393                 mutex_unlock(&stream->mutex);
 394                 return -EBUSY;
 395         }
 396
 397         format = stream->cur_format;
 398         frame = stream->cur_frame;
 399         probe = stream->ctrl;
 400         probe.dwFrameInterval = uvc_try_frame_interval(frame, interval);
 401         maxd = abs((s32)probe.dwFrameInterval - interval);
 402
 403         /* Try frames with matching size to find the best frame interval. */
 404         for (i = 0; i < format->nframes && maxd != 0; i++) {
 405                 u32 d, ival;
 406
 407                 if (&format->frame[i] == stream->cur_frame)
 408                         continue;
 409
 410                 if (format->frame[i].wWidth != stream->cur_frame->wWidth ||
 411                     format->frame[i].wHeight != stream->cur_frame->wHeight)
 412                         continue;
 413
 414                 ival = uvc_try_frame_interval(&format->frame[i], interval);
 415                 d = abs((s32)ival - interval);
 416                 if (d >= maxd)
 417                         continue;
 418
 419                 frame = &format->frame[i];
 420                 probe.bFrameIndex = frame->bFrameIndex;
 421                 probe.dwFrameInterval = ival;
 422                 maxd = d;
 423         }
 424
 425         /* Probe the device with the new settings. */
 426         ret = uvc_probe_video(stream, &probe);
 427         if (ret < 0) {
 428                 mutex_unlock(&stream->mutex);
 429                 return ret;
 430         }
 431
 432         stream->ctrl = probe;
 433         stream->cur_frame = frame;
 434         mutex_unlock(&stream->mutex);
 435
 436         /* Return the actual frame period. */
 437         timeperframe.numerator = probe.dwFrameInterval;
 438         timeperframe.denominator = 10000000;
 439         uvc_simplify_fraction(&timeperframe.numerator,
 440                 &timeperframe.denominator, 8, 333);
 441
 442         if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 443                 parm->parm.capture.timeperframe = timeperframe;
 444         else
 445                 parm->parm.output.timeperframe = timeperframe;
 446
 447         return 0;
 448 }
 449
 450 /* ------------------------------------------------------------------------
 451  * Privilege management
 452  */
 453
 454 /*
 455  * Privilege management is the multiple-open implementation basis. The current
 456  * implementation is completely transparent for the end-user and doesn't
 457  * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls.
 458  * Those ioctls enable finer control on the device (by making possible for a
 459  * user to request exclusive access to a device), but are not mature yet.
 460  * Switching to the V4L2 priority mechanism might be considered in the future
 461  * if this situation changes.
 462  *
 463  * Each open instance of a UVC device can either be in a privileged or
 464  * unprivileged state. Only a single instance can be in a privileged state at
 465  * a given time. Trying to perform an operation that requires privileges will
 466  * automatically acquire the required privileges if possible, or return -EBUSY
 467  * otherwise. Privileges are dismissed when closing the instance or when
 468  * freeing the video buffers using VIDIOC_REQBUFS.
 469  *
 470  * Operations that require privileges are:
 471  *
 472  * - VIDIOC_S_INPUT
 473  * - VIDIOC_S_PARM
 474  * - VIDIOC_S_FMT
 475  * - VIDIOC_REQBUFS
 476  */
 477 static int uvc_acquire_privileges(struct uvc_fh *handle)
 478 {
 479         /* Always succeed if the handle is already privileged. */
 480         if (handle->state == UVC_HANDLE_ACTIVE)
 481                 return 0;
 482
 483         /* Check if the device already has a privileged handle. */
 484         if (atomic_inc_return(&handle->stream->active) != 1) {
 485                 atomic_dec(&handle->stream->active);
 486                 return -EBUSY;
 487         }
 488
 489         handle->state = UVC_HANDLE_ACTIVE;
 490         return 0;
 491 }
 492
 493 static void uvc_dismiss_privileges(struct uvc_fh *handle)
 494 {
 495         if (handle->state == UVC_HANDLE_ACTIVE)
 496                 atomic_dec(&handle->stream->active);
 497
 498         handle->state = UVC_HANDLE_PASSIVE;
 499 }
 500
 501 static int uvc_has_privileges(struct uvc_fh *handle)
 502 {
 503         return handle->state == UVC_HANDLE_ACTIVE;
 504 }
 505
 506 /* ------------------------------------------------------------------------
 507  * V4L2 file operations
 508  */
 509
 510 static int uvc_v4l2_open(struct file *file)
 511 {
 512         struct uvc_streaming *stream;
 513         struct uvc_fh *handle;
 514         int ret = 0;
 515
 516         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
 517         stream = video_drvdata(file);
 518
 519         ret = usb_autopm_get_interface(stream->dev->intf);
 520         if (ret < 0)
 521                 return ret;
 522
 523         /* Create the device handle. */
 524         handle = kzalloc(sizeof(*handle), GFP_KERNEL);
 525         if (handle == NULL) {
 526                 usb_autopm_put_interface(stream->dev->intf);
 527                 return -ENOMEM;
 528         }
 529
 530         mutex_lock(&stream->dev->lock);
 531         if (stream->dev->users == 0) {
 532                 ret = uvc_status_start(stream->dev, GFP_KERNEL);
 533                 if (ret < 0) {
 534                         mutex_unlock(&stream->dev->lock);
 535                         usb_autopm_put_interface(stream->dev->intf);
 536                         kfree(handle);
 537                         return ret;
 538                 }
 539         }
 540
 541         stream->dev->users++;
 542         mutex_unlock(&stream->dev->lock);
 543
 544         v4l2_fh_init(&handle->vfh, &stream->vdev);
 545         v4l2_fh_add(&handle->vfh);
 546         handle->chain = stream->chain;
 547         handle->stream = stream;
 548         handle->state = UVC_HANDLE_PASSIVE;
 549         file->private_data = handle;
 550
 551         return 0;
 552 }
 553
 554 static int uvc_v4l2_release(struct file *file)
 555 {
 556         struct uvc_fh *handle = file->private_data;
 557         struct uvc_streaming *stream = handle->stream;
 558
 559         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n");
 560
 561         /* Only free resources if this is a privileged handle. */
 562         if (uvc_has_privileges(handle))
 563                 uvc_queue_release(&stream->queue);
 564
 565         /* Release the file handle. */
 566         uvc_dismiss_privileges(handle);
 567         v4l2_fh_del(&handle->vfh);
 568         v4l2_fh_exit(&handle->vfh);
 569         kfree(handle);
 570         file->private_data = NULL;
 571
 572         mutex_lock(&stream->dev->lock);
 573         if (--stream->dev->users == 0)
 574                 uvc_status_stop(stream->dev);
 575         mutex_unlock(&stream->dev->lock);
 576
 577         usb_autopm_put_interface(stream->dev->intf);
 578         return 0;
 579 }
 580
 581 static int uvc_ioctl_querycap(struct file *file, void *fh,
 582                               struct v4l2_capability *cap)
 583 {
 584         struct video_device *vdev = video_devdata(file);
 585         struct uvc_fh *handle = file->private_data;
 586         struct uvc_video_chain *chain = handle->chain;
 587         struct uvc_streaming *stream = handle->stream;
 588
 589         strscpy(cap->driver, "uvcvideo", sizeof(cap->driver));
 590         strscpy(cap->card, vdev->name, sizeof(cap->card));
 591         usb_make_path(stream->dev->udev, cap->bus_info, sizeof(cap->bus_info));
 592         cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING
 593                           | chain->caps;
 594
 595         return 0;
 596 }
 597
 598 static int uvc_ioctl_enum_fmt(struct uvc_streaming *stream,
 599                               struct v4l2_fmtdesc *fmt)
 600 {
 601         struct uvc_format *format;
 602         enum v4l2_buf_type type = fmt->type;
 603         u32 index = fmt->index;
 604
 605         if (fmt->type != stream->type || fmt->index >= stream->nformats)
 606                 return -EINVAL;
 607
 608         memset(fmt, 0, sizeof(*fmt));
 609         fmt->index = index;
 610         fmt->type = type;
 611
 612         format = &stream->format[fmt->index];
 613         fmt->flags = 0;
 614         if (format->flags & UVC_FMT_FLAG_COMPRESSED)
 615                 fmt->flags |= V4L2_FMT_FLAG_COMPRESSED;
 616         strscpy(fmt->description, format->name, sizeof(fmt->description));
 617         fmt->description[sizeof(fmt->description) - 1] = 0;
 618         fmt->pixelformat = format->fcc;
 619         return 0;
 620 }
 621
 622 static int uvc_ioctl_enum_fmt_vid_cap(struct file *file, void *fh,
 623                                       struct v4l2_fmtdesc *fmt)
 624 {
 625         struct uvc_fh *handle = fh;
 626         struct uvc_streaming *stream = handle->stream;
 627
 628         return uvc_ioctl_enum_fmt(stream, fmt);
 629 }
 630
 631 static int uvc_ioctl_enum_fmt_vid_out(struct file *file, void *fh,
 632                                       struct v4l2_fmtdesc *fmt)
 633 {
 634         struct uvc_fh *handle = fh;
 635         struct uvc_streaming *stream = handle->stream;
 636
 637         return uvc_ioctl_enum_fmt(stream, fmt);
 638 }
 639
 640 static int uvc_ioctl_g_fmt_vid_cap(struct file *file, void *fh,
 641                                    struct v4l2_format *fmt)
 642 {
 643         struct uvc_fh *handle = fh;
 644         struct uvc_streaming *stream = handle->stream;
 645
 646         return uvc_v4l2_get_format(stream, fmt);
 647 }
 648
 649 static int uvc_ioctl_g_fmt_vid_out(struct file *file, void *fh,
 650                                    struct v4l2_format *fmt)
 651 {
 652         struct uvc_fh *handle = fh;
 653         struct uvc_streaming *stream = handle->stream;
 654
 655         return uvc_v4l2_get_format(stream, fmt);
 656 }
 657
 658 static int uvc_ioctl_s_fmt_vid_cap(struct file *file, void *fh,
 659                                    struct v4l2_format *fmt)
 660 {
 661         struct uvc_fh *handle = fh;
 662         struct uvc_streaming *stream = handle->stream;
 663         int ret;
 664
 665         ret = uvc_acquire_privileges(handle);
 666         if (ret < 0)
 667                 return ret;
 668
 669         return uvc_v4l2_set_format(stream, fmt);
 670 }
 671
 672 static int uvc_ioctl_s_fmt_vid_out(struct file *file, void *fh,
 673                                    struct v4l2_format *fmt)
 674 {
 675         struct uvc_fh *handle = fh;
 676         struct uvc_streaming *stream = handle->stream;
 677         int ret;
 678
 679         ret = uvc_acquire_privileges(handle);
 680         if (ret < 0)
 681                 return ret;
 682
 683         return uvc_v4l2_set_format(stream, fmt);
 684 }
 685
 686 static int uvc_ioctl_try_fmt_vid_cap(struct file *file, void *fh,
 687                                      struct v4l2_format *fmt)
 688 {
 689         struct uvc_fh *handle = fh;
 690         struct uvc_streaming *stream = handle->stream;
 691         struct uvc_streaming_control probe;
 692
 693         return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
 694 }
 695
 696 static int uvc_ioctl_try_fmt_vid_out(struct file *file, void *fh,
 697                                      struct v4l2_format *fmt)
 698 {
 699         struct uvc_fh *handle = fh;
 700         struct uvc_streaming *stream = handle->stream;
 701         struct uvc_streaming_control probe;
 702
 703         return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL);
 704 }
 705
 706 static int uvc_ioctl_reqbufs(struct file *file, void *fh,
 707                              struct v4l2_requestbuffers *rb)
 708 {
 709         struct uvc_fh *handle = fh;
 710         struct uvc_streaming *stream = handle->stream;
 711         int ret;
 712
 713         ret = uvc_acquire_privileges(handle);
 714         if (ret < 0)
 715                 return ret;
 716
 717         mutex_lock(&stream->mutex);
 718         ret = uvc_request_buffers(&stream->queue, rb);
 719         mutex_unlock(&stream->mutex);
 720         if (ret < 0)
 721                 return ret;
 722
 723         if (ret == 0)
 724                 uvc_dismiss_privileges(handle);
 725
 726         return 0;
 727 }
 728
 729 static int uvc_ioctl_querybuf(struct file *file, void *fh,
 730                               struct v4l2_buffer *buf)
 731 {
 732         struct uvc_fh *handle = fh;
 733         struct uvc_streaming *stream = handle->stream;
 734
 735         if (!uvc_has_privileges(handle))
 736                 return -EBUSY;
 737
 738         return uvc_query_buffer(&stream->queue, buf);
 739 }
 740
 741 static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
 742 {
 743         struct uvc_fh *handle = fh;
 744         struct uvc_streaming *stream = handle->stream;
 745
 746         if (!uvc_has_privileges(handle))
 747                 return -EBUSY;
 748
 749         return uvc_queue_buffer(&stream->queue,
 750                                 stream->vdev.v4l2_dev->mdev, 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         strscpy(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         int ret;
 870         u8 i;
 871
 872         if (chain->selector == NULL ||
 873             (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
 874                 *input = 0;
 875                 return 0;
 876         }
 877
 878         ret = uvc_query_ctrl(chain->dev, UVC_GET_CUR, chain->selector->id,
 879                              chain->dev->intfnum,  UVC_SU_INPUT_SELECT_CONTROL,
 880                              &i, 1);
 881         if (ret < 0)
 882                 return ret;
 883
 884         *input = i - 1;
 885         return 0;
 886 }
 887
 888 static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int input)
 889 {
 890         struct uvc_fh *handle = fh;
 891         struct uvc_video_chain *chain = handle->chain;
 892         int ret;
 893         u32 i;
 894
 895         ret = uvc_acquire_privileges(handle);
 896         if (ret < 0)
 897                 return ret;
 898
 899         if (chain->selector == NULL ||
 900             (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) {
 901                 if (input)
 902                         return -EINVAL;
 903                 return 0;
 904         }
 905
 906         if (input >= chain->selector->bNrInPins)
 907                 return -EINVAL;
 908
 909         i = input + 1;
 910         return uvc_query_ctrl(chain->dev, UVC_SET_CUR, chain->selector->id,
 911                               chain->dev->intfnum, UVC_SU_INPUT_SELECT_CONTROL,
 912                               &i, 1);
 913 }
 914
 915 static int uvc_ioctl_queryctrl(struct file *file, void *fh,
 916                                struct v4l2_queryctrl *qc)
 917 {
 918         struct uvc_fh *handle = fh;
 919         struct uvc_video_chain *chain = handle->chain;
 920
 921         return uvc_query_v4l2_ctrl(chain, qc);
 922 }
 923
 924 static int uvc_ioctl_query_ext_ctrl(struct file *file, void *fh,
 925                                     struct v4l2_query_ext_ctrl *qec)
 926 {
 927         struct uvc_fh *handle = fh;
 928         struct uvc_video_chain *chain = handle->chain;
 929         struct v4l2_queryctrl qc = { qec->id };
 930         int ret;
 931
 932         ret = uvc_query_v4l2_ctrl(chain, &qc);
 933         if (ret)
 934                 return ret;
 935
 936         qec->id = qc.id;
 937         qec->type = qc.type;
 938         strscpy(qec->name, qc.name, sizeof(qec->name));
 939         qec->minimum = qc.minimum;
 940         qec->maximum = qc.maximum;
 941         qec->step = qc.step;
 942         qec->default_value = qc.default_value;
 943         qec->flags = qc.flags;
 944         qec->elem_size = 4;
 945         qec->elems = 1;
 946         qec->nr_of_dims = 0;
 947         memset(qec->dims, 0, sizeof(qec->dims));
 948         memset(qec->reserved, 0, sizeof(qec->reserved));
 949
 950         return 0;
 951 }
 952
 953 static int uvc_ioctl_g_ctrl(struct file *file, void *fh,
 954                             struct v4l2_control *ctrl)
 955 {
 956         struct uvc_fh *handle = fh;
 957         struct uvc_video_chain *chain = handle->chain;
 958         struct v4l2_ext_control xctrl;
 959         int ret;
 960
 961         memset(&xctrl, 0, sizeof(xctrl));
 962         xctrl.id = ctrl->id;
 963
 964         ret = uvc_ctrl_begin(chain);
 965         if (ret < 0)
 966                 return ret;
 967
 968         ret = uvc_ctrl_get(chain, &xctrl);
 969         uvc_ctrl_rollback(handle);
 970         if (ret < 0)
 971                 return ret;
 972
 973         ctrl->value = xctrl.value;
 974         return 0;
 975 }
 976
 977 static int uvc_ioctl_s_ctrl(struct file *file, void *fh,
 978                             struct v4l2_control *ctrl)
 979 {
 980         struct uvc_fh *handle = fh;
 981         struct uvc_video_chain *chain = handle->chain;
 982         struct v4l2_ext_control xctrl;
 983         int ret;
 984
 985         memset(&xctrl, 0, sizeof(xctrl));
 986         xctrl.id = ctrl->id;
 987         xctrl.value = ctrl->value;
 988
 989         ret = uvc_ctrl_begin(chain);
 990         if (ret < 0)
 991                 return ret;
 992
 993         ret = uvc_ctrl_set(handle, &xctrl);
 994         if (ret < 0) {
 995                 uvc_ctrl_rollback(handle);
 996                 return ret;
 997         }
 998
 999         ret = uvc_ctrl_commit(handle, &xctrl, 1);
1000         if (ret < 0)
1001                 return ret;
1002
1003         ctrl->value = xctrl.value;
1004         return 0;
1005 }
1006
1007 static int uvc_ioctl_g_ext_ctrls(struct file *file, void *fh,
1008                                  struct v4l2_ext_controls *ctrls)
1009 {
1010         struct uvc_fh *handle = fh;
1011         struct uvc_video_chain *chain = handle->chain;
1012         struct v4l2_ext_control *ctrl = ctrls->controls;
1013         unsigned int i;
1014         int ret;
1015
1016         if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL) {
1017                 for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1018                         struct v4l2_queryctrl qc = { .id = ctrl->id };
1019
1020                         ret = uvc_query_v4l2_ctrl(chain, &qc);
1021                         if (ret < 0) {
1022                                 ctrls->error_idx = i;
1023                                 return ret;
1024                         }
1025
1026                         ctrl->value = qc.default_value;
1027                 }
1028
1029                 return 0;
1030         }
1031
1032         ret = uvc_ctrl_begin(chain);
1033         if (ret < 0)
1034                 return ret;
1035
1036         for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1037                 ret = uvc_ctrl_get(chain, ctrl);
1038                 if (ret < 0) {
1039                         uvc_ctrl_rollback(handle);
1040                         ctrls->error_idx = i;
1041                         return ret;
1042                 }
1043         }
1044
1045         ctrls->error_idx = 0;
1046
1047         return uvc_ctrl_rollback(handle);
1048 }
1049
1050 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,
1051                                      struct v4l2_ext_controls *ctrls,
1052                                      bool commit)
1053 {
1054         struct v4l2_ext_control *ctrl = ctrls->controls;
1055         struct uvc_video_chain *chain = handle->chain;
1056         unsigned int i;
1057         int ret;
1058
1059         /* Default value cannot be changed */
1060         if (ctrls->which == V4L2_CTRL_WHICH_DEF_VAL)
1061                 return -EINVAL;
1062
1063         ret = uvc_ctrl_begin(chain);
1064         if (ret < 0)
1065                 return ret;
1066
1067         for (i = 0; i < ctrls->count; ++ctrl, ++i) {
1068                 ret = uvc_ctrl_set(handle, ctrl);
1069                 if (ret < 0) {
1070                         uvc_ctrl_rollback(handle);
1071                         ctrls->error_idx = commit ? ctrls->count : i;
1072                         return ret;
1073                 }
1074         }
1075
1076         ctrls->error_idx = 0;
1077
1078         if (commit)
1079                 return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);
1080         else
1081                 return uvc_ctrl_rollback(handle);
1082 }
1083
1084 static int uvc_ioctl_s_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, true);
1090 }
1091
1092 static int uvc_ioctl_try_ext_ctrls(struct file *file, void *fh,
1093                                    struct v4l2_ext_controls *ctrls)
1094 {
1095         struct uvc_fh *handle = fh;
1096
1097         return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);
1098 }
1099
1100 static int uvc_ioctl_querymenu(struct file *file, void *fh,
1101                                struct v4l2_querymenu *qm)
1102 {
1103         struct uvc_fh *handle = fh;
1104         struct uvc_video_chain *chain = handle->chain;
1105
1106         return uvc_query_v4l2_menu(chain, qm);
1107 }
1108
1109 static int uvc_ioctl_g_selection(struct file *file, void *fh,
1110                                  struct v4l2_selection *sel)
1111 {
1112         struct uvc_fh *handle = fh;
1113         struct uvc_streaming *stream = handle->stream;
1114
1115         if (sel->type != stream->type)
1116                 return -EINVAL;
1117
1118         switch (sel->target) {
1119         case V4L2_SEL_TGT_CROP_DEFAULT:
1120         case V4L2_SEL_TGT_CROP_BOUNDS:
1121                 if (stream->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1122                         return -EINVAL;
1123                 break;
1124         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1125         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1126                 if (stream->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
1127                         return -EINVAL;
1128                 break;
1129         default:
1130                 return -EINVAL;
1131         }
1132
1133         sel->r.left = 0;
1134         sel->r.top = 0;
1135         mutex_lock(&stream->mutex);
1136         sel->r.width = stream->cur_frame->wWidth;
1137         sel->r.height = stream->cur_frame->wHeight;
1138         mutex_unlock(&stream->mutex);
1139
1140         return 0;
1141 }
1142
1143 static int uvc_ioctl_g_parm(struct file *file, void *fh,
1144                             struct v4l2_streamparm *parm)
1145 {
1146         struct uvc_fh *handle = fh;
1147         struct uvc_streaming *stream = handle->stream;
1148
1149         return uvc_v4l2_get_streamparm(stream, parm);
1150 }
1151
1152 static int uvc_ioctl_s_parm(struct file *file, void *fh,
1153                             struct v4l2_streamparm *parm)
1154 {
1155         struct uvc_fh *handle = fh;
1156         struct uvc_streaming *stream = handle->stream;
1157         int ret;
1158
1159         ret = uvc_acquire_privileges(handle);
1160         if (ret < 0)
1161                 return ret;
1162
1163         return uvc_v4l2_set_streamparm(stream, parm);
1164 }
1165
1166 static int uvc_ioctl_enum_framesizes(struct file *file, void *fh,
1167                                      struct v4l2_frmsizeenum *fsize)
1168 {
1169         struct uvc_fh *handle = fh;
1170         struct uvc_streaming *stream = handle->stream;
1171         struct uvc_format *format = NULL;
1172         struct uvc_frame *frame = NULL;
1173         unsigned int index;
1174         unsigned int i;
1175
1176         /* Look for the given pixel format */
1177         for (i = 0; i < stream->nformats; i++) {
1178                 if (stream->format[i].fcc == fsize->pixel_format) {
1179                         format = &stream->format[i];
1180                         break;
1181                 }
1182         }
1183         if (format == NULL)
1184                 return -EINVAL;
1185
1186         /* Skip duplicate frame sizes */
1187         for (i = 0, index = 0; i < format->nframes; i++) {
1188                 if (frame && frame->wWidth == format->frame[i].wWidth &&
1189                     frame->wHeight == format->frame[i].wHeight)
1190                         continue;
1191                 frame = &format->frame[i];
1192                 if (index == fsize->index)
1193                         break;
1194                 index++;
1195         }
1196
1197         if (i == format->nframes)
1198                 return -EINVAL;
1199
1200         fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1201         fsize->discrete.width = frame->wWidth;
1202         fsize->discrete.height = frame->wHeight;
1203         return 0;
1204 }
1205
1206 static int uvc_ioctl_enum_frameintervals(struct file *file, void *fh,
1207                                          struct v4l2_frmivalenum *fival)
1208 {
1209         struct uvc_fh *handle = fh;
1210         struct uvc_streaming *stream = handle->stream;
1211         struct uvc_format *format = NULL;
1212         struct uvc_frame *frame = NULL;
1213         unsigned int nintervals;
1214         unsigned int index;
1215         unsigned int i;
1216
1217         /* Look for the given pixel format and frame size */
1218         for (i = 0; i < stream->nformats; i++) {
1219                 if (stream->format[i].fcc == fival->pixel_format) {
1220                         format = &stream->format[i];
1221                         break;
1222                 }
1223         }
1224         if (format == NULL)
1225                 return -EINVAL;
1226
1227         index = fival->index;
1228         for (i = 0; i < format->nframes; i++) {
1229                 if (format->frame[i].wWidth == fival->width &&
1230                     format->frame[i].wHeight == fival->height) {
1231                         frame = &format->frame[i];
1232                         nintervals = frame->bFrameIntervalType ?: 1;
1233                         if (index < nintervals)
1234                                 break;
1235                         index -= nintervals;
1236                 }
1237         }
1238         if (i == format->nframes)
1239                 return -EINVAL;
1240
1241         if (frame->bFrameIntervalType) {
1242                 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
1243                 fival->discrete.numerator =
1244                         frame->dwFrameInterval[index];
1245                 fival->discrete.denominator = 10000000;
1246                 uvc_simplify_fraction(&fival->discrete.numerator,
1247                         &fival->discrete.denominator, 8, 333);
1248         } else {
1249                 fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
1250                 fival->stepwise.min.numerator = frame->dwFrameInterval[0];
1251                 fival->stepwise.min.denominator = 10000000;
1252                 fival->stepwise.max.numerator = frame->dwFrameInterval[1];
1253                 fival->stepwise.max.denominator = 10000000;
1254                 fival->stepwise.step.numerator = frame->dwFrameInterval[2];
1255                 fival->stepwise.step.denominator = 10000000;
1256                 uvc_simplify_fraction(&fival->stepwise.min.numerator,
1257                         &fival->stepwise.min.denominator, 8, 333);
1258                 uvc_simplify_fraction(&fival->stepwise.max.numerator,
1259                         &fival->stepwise.max.denominator, 8, 333);
1260                 uvc_simplify_fraction(&fival->stepwise.step.numerator,
1261                         &fival->stepwise.step.denominator, 8, 333);
1262         }
1263
1264         return 0;
1265 }
1266
1267 static int uvc_ioctl_subscribe_event(struct v4l2_fh *fh,
1268                                      const struct v4l2_event_subscription *sub)
1269 {
1270         switch (sub->type) {
1271         case V4L2_EVENT_CTRL:
1272                 return v4l2_event_subscribe(fh, sub, 0, &uvc_ctrl_sub_ev_ops);
1273         default:
1274                 return -EINVAL;
1275         }
1276 }
1277
1278 static long uvc_ioctl_default(struct file *file, void *fh, bool valid_prio,
1279                               unsigned int cmd, void *arg)
1280 {
1281         struct uvc_fh *handle = fh;
1282         struct uvc_video_chain *chain = handle->chain;
1283
1284         switch (cmd) {
1285         /* Dynamic controls. */
1286         case UVCIOC_CTRL_MAP:
1287                 return uvc_ioctl_ctrl_map(chain, arg);
1288
1289         case UVCIOC_CTRL_QUERY:
1290                 return uvc_xu_ctrl_query(chain, arg);
1291
1292         default:
1293                 return -ENOTTY;
1294         }
1295 }
1296
1297 #ifdef CONFIG_COMPAT
1298 struct uvc_xu_control_mapping32 {
1299         u32 id;
1300         u8 name[32];
1301         u8 entity[16];
1302         u8 selector;
1303
1304         u8 size;
1305         u8 offset;
1306         u32 v4l2_type;
1307         u32 data_type;
1308
1309         compat_caddr_t menu_info;
1310         u32 menu_count;
1311
1312         u32 reserved[4];
1313 };
1314
1315 static int uvc_v4l2_get_xu_mapping(struct uvc_xu_control_mapping *kp,
1316                         const struct uvc_xu_control_mapping32 __user *up)
1317 {
1318         struct uvc_xu_control_mapping32 *p = (void *)kp;
1319         compat_caddr_t info;
1320         u32 count;
1321
1322         if (copy_from_user(p, up, sizeof(*p)))
1323                 return -EFAULT;
1324
1325         count = p->menu_count;
1326         info = p->menu_info;
1327
1328         memset(kp->reserved, 0, sizeof(kp->reserved));
1329         kp->menu_info = count ? compat_ptr(info) : NULL;
1330         kp->menu_count = count;
1331         return 0;
1332 }
1333
1334 static int uvc_v4l2_put_xu_mapping(const struct uvc_xu_control_mapping *kp,
1335                         struct uvc_xu_control_mapping32 __user *up)
1336 {
1337         if (copy_to_user(up, kp, offsetof(typeof(*up), menu_info)) ||
1338             put_user(kp->menu_count, &up->menu_count))
1339                 return -EFAULT;
1340
1341         if (clear_user(up->reserved, sizeof(up->reserved)))
1342                 return -EFAULT;
1343
1344         return 0;
1345 }
1346
1347 struct uvc_xu_control_query32 {
1348         u8 unit;
1349         u8 selector;
1350         u8 query;
1351         u16 size;
1352         compat_caddr_t data;
1353 };
1354
1355 static int uvc_v4l2_get_xu_query(struct uvc_xu_control_query *kp,
1356                         const struct uvc_xu_control_query32 __user *up)
1357 {
1358         struct uvc_xu_control_query32 v;
1359
1360         if (copy_from_user(&v, up, sizeof(v)))
1361                 return -EFAULT;
1362
1363         *kp = (struct uvc_xu_control_query){
1364                 .unit = v.unit,
1365                 .selector = v.selector,
1366                 .query = v.query,
1367                 .size = v.size,
1368                 .data = v.size ? compat_ptr(v.data) : NULL
1369         };
1370         return 0;
1371 }
1372
1373 static int uvc_v4l2_put_xu_query(const struct uvc_xu_control_query *kp,
1374                         struct uvc_xu_control_query32 __user *up)
1375 {
1376         if (copy_to_user(up, kp, offsetof(typeof(*up), data)))
1377                 return -EFAULT;
1378         return 0;
1379 }
1380
1381 #define UVCIOC_CTRL_MAP32       _IOWR('u', 0x20, struct uvc_xu_control_mapping32)
1382 #define UVCIOC_CTRL_QUERY32     _IOWR('u', 0x21, struct uvc_xu_control_query32)
1383
1384 static long uvc_v4l2_compat_ioctl32(struct file *file,
1385                      unsigned int cmd, unsigned long arg)
1386 {
1387         struct uvc_fh *handle = file->private_data;
1388         union {
1389                 struct uvc_xu_control_mapping xmap;
1390                 struct uvc_xu_control_query xqry;
1391         } karg;
1392         void __user *up = compat_ptr(arg);
1393         long ret;
1394
1395         switch (cmd) {
1396         case UVCIOC_CTRL_MAP32:
1397                 ret = uvc_v4l2_get_xu_mapping(&karg.xmap, up);
1398                 if (ret)
1399                         return ret;
1400                 ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);
1401                 if (ret)
1402                         return ret;
1403                 ret = uvc_v4l2_put_xu_mapping(&karg.xmap, up);
1404                 if (ret)
1405                         return ret;
1406
1407                 break;
1408
1409         case UVCIOC_CTRL_QUERY32:
1410                 ret = uvc_v4l2_get_xu_query(&karg.xqry, up);
1411                 if (ret)
1412                         return ret;
1413                 ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);
1414                 if (ret)
1415                         return ret;
1416                 ret = uvc_v4l2_put_xu_query(&karg.xqry, up);
1417                 if (ret)
1418                         return ret;
1419                 break;
1420
1421         default:
1422                 return -ENOIOCTLCMD;
1423         }
1424
1425         return ret;
1426 }
1427 #endif
1428
1429 static ssize_t uvc_v4l2_read(struct file *file, char __user *data,
1430                     size_t count, loff_t *ppos)
1431 {
1432         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n");
1433         return -EINVAL;
1434 }
1435
1436 static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma)
1437 {
1438         struct uvc_fh *handle = file->private_data;
1439         struct uvc_streaming *stream = handle->stream;
1440
1441         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n");
1442
1443         return uvc_queue_mmap(&stream->queue, vma);
1444 }
1445
1446 static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait)
1447 {
1448         struct uvc_fh *handle = file->private_data;
1449         struct uvc_streaming *stream = handle->stream;
1450
1451         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n");
1452
1453         return uvc_queue_poll(&stream->queue, file, wait);
1454 }
1455
1456 #ifndef CONFIG_MMU
1457 static unsigned long uvc_v4l2_get_unmapped_area(struct file *file,
1458                 unsigned long addr, unsigned long len, unsigned long pgoff,
1459                 unsigned long flags)
1460 {
1461         struct uvc_fh *handle = file->private_data;
1462         struct uvc_streaming *stream = handle->stream;
1463
1464         uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_get_unmapped_area\n");
1465
1466         return uvc_queue_get_unmapped_area(&stream->queue, pgoff);
1467 }
1468 #endif
1469
1470 const struct v4l2_ioctl_ops uvc_ioctl_ops = {
1471         .vidioc_querycap = uvc_ioctl_querycap,
1472         .vidioc_enum_fmt_vid_cap = uvc_ioctl_enum_fmt_vid_cap,
1473         .vidioc_enum_fmt_vid_out = uvc_ioctl_enum_fmt_vid_out,
1474         .vidioc_g_fmt_vid_cap = uvc_ioctl_g_fmt_vid_cap,
1475         .vidioc_g_fmt_vid_out = uvc_ioctl_g_fmt_vid_out,
1476         .vidioc_s_fmt_vid_cap = uvc_ioctl_s_fmt_vid_cap,
1477         .vidioc_s_fmt_vid_out = uvc_ioctl_s_fmt_vid_out,
1478         .vidioc_try_fmt_vid_cap = uvc_ioctl_try_fmt_vid_cap,
1479         .vidioc_try_fmt_vid_out = uvc_ioctl_try_fmt_vid_out,
1480         .vidioc_reqbufs = uvc_ioctl_reqbufs,
1481         .vidioc_querybuf = uvc_ioctl_querybuf,
1482         .vidioc_qbuf = uvc_ioctl_qbuf,
1483         .vidioc_expbuf = uvc_ioctl_expbuf,
1484         .vidioc_dqbuf = uvc_ioctl_dqbuf,
1485         .vidioc_create_bufs = uvc_ioctl_create_bufs,
1486         .vidioc_streamon = uvc_ioctl_streamon,
1487         .vidioc_streamoff = uvc_ioctl_streamoff,
1488         .vidioc_enum_input = uvc_ioctl_enum_input,
1489         .vidioc_g_input = uvc_ioctl_g_input,
1490         .vidioc_s_input = uvc_ioctl_s_input,
1491         .vidioc_queryctrl = uvc_ioctl_queryctrl,
1492         .vidioc_query_ext_ctrl = uvc_ioctl_query_ext_ctrl,
1493         .vidioc_g_ctrl = uvc_ioctl_g_ctrl,
1494         .vidioc_s_ctrl = uvc_ioctl_s_ctrl,
1495         .vidioc_g_ext_ctrls = uvc_ioctl_g_ext_ctrls,
1496         .vidioc_s_ext_ctrls = uvc_ioctl_s_ext_ctrls,
1497         .vidioc_try_ext_ctrls = uvc_ioctl_try_ext_ctrls,
1498         .vidioc_querymenu = uvc_ioctl_querymenu,
1499         .vidioc_g_selection = uvc_ioctl_g_selection,
1500         .vidioc_g_parm = uvc_ioctl_g_parm,
1501         .vidioc_s_parm = uvc_ioctl_s_parm,
1502         .vidioc_enum_framesizes = uvc_ioctl_enum_framesizes,
1503         .vidioc_enum_frameintervals = uvc_ioctl_enum_frameintervals,
1504         .vidioc_subscribe_event = uvc_ioctl_subscribe_event,
1505         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1506         .vidioc_default = uvc_ioctl_default,
1507 };
1508
1509 const struct v4l2_file_operations uvc_fops = {
1510         .owner          = THIS_MODULE,
1511         .open           = uvc_v4l2_open,
1512         .release        = uvc_v4l2_release,
1513         .unlocked_ioctl = video_ioctl2,
1514 #ifdef CONFIG_COMPAT
1515         .compat_ioctl32 = uvc_v4l2_compat_ioctl32,
1516 #endif
1517         .read           = uvc_v4l2_read,
1518         .mmap           = uvc_v4l2_mmap,
1519         .poll           = uvc_v4l2_poll,
1520 #ifndef CONFIG_MMU
1521         .get_unmapped_area = uvc_v4l2_get_unmapped_area,
1522 #endif
1523 };
1524