drivers/media/usb/uvc/uvc_driver.c

   1 /*
   2  *      uvc_driver.c  --  USB Video Class driver
   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/atomic.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/wait.h>
  23 #include <linux/version.h>
  24 #include <asm/unaligned.h>
  25
  26 #include <media/v4l2-common.h>
  27
  28 #include "uvcvideo.h"
  29
  30 #define DRIVER_AUTHOR           "Laurent Pinchart " \
  31                                 "<laurent.pinchart@ideasonboard.com>"
  32 #define DRIVER_DESC             "USB Video Class driver"
  33
  34 unsigned int uvc_clock_param = CLOCK_MONOTONIC;
  35 unsigned int uvc_no_drop_param;
  36 static unsigned int uvc_quirks_param = -1;
  37 unsigned int uvc_trace_param;
  38 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT;
  39
  40 /* ------------------------------------------------------------------------
  41  * Video formats
  42  */
  43
  44 static struct uvc_format_desc uvc_fmts[] = {
  45         {
  46                 .name           = "YUV 4:2:2 (YUYV)",
  47                 .guid           = UVC_GUID_FORMAT_YUY2,
  48                 .fcc            = V4L2_PIX_FMT_YUYV,
  49         },
  50         {
  51                 .name           = "YUV 4:2:2 (YUYV)",
  52                 .guid           = UVC_GUID_FORMAT_YUY2_ISIGHT,
  53                 .fcc            = V4L2_PIX_FMT_YUYV,
  54         },
  55         {
  56                 .name           = "YUV 4:2:0 (NV12)",
  57                 .guid           = UVC_GUID_FORMAT_NV12,
  58                 .fcc            = V4L2_PIX_FMT_NV12,
  59         },
  60         {
  61                 .name           = "MJPEG",
  62                 .guid           = UVC_GUID_FORMAT_MJPEG,
  63                 .fcc            = V4L2_PIX_FMT_MJPEG,
  64         },
  65         {
  66                 .name           = "YVU 4:2:0 (YV12)",
  67                 .guid           = UVC_GUID_FORMAT_YV12,
  68                 .fcc            = V4L2_PIX_FMT_YVU420,
  69         },
  70         {
  71                 .name           = "YUV 4:2:0 (I420)",
  72                 .guid           = UVC_GUID_FORMAT_I420,
  73                 .fcc            = V4L2_PIX_FMT_YUV420,
  74         },
  75         {
  76                 .name           = "YUV 4:2:0 (M420)",
  77                 .guid           = UVC_GUID_FORMAT_M420,
  78                 .fcc            = V4L2_PIX_FMT_M420,
  79         },
  80         {
  81                 .name           = "YUV 4:2:2 (UYVY)",
  82                 .guid           = UVC_GUID_FORMAT_UYVY,
  83                 .fcc            = V4L2_PIX_FMT_UYVY,
  84         },
  85         {
  86                 .name           = "Greyscale 8-bit (Y800)",
  87                 .guid           = UVC_GUID_FORMAT_Y800,
  88                 .fcc            = V4L2_PIX_FMT_GREY,
  89         },
  90         {
  91                 .name           = "Greyscale 8-bit (Y8  )",
  92                 .guid           = UVC_GUID_FORMAT_Y8,
  93                 .fcc            = V4L2_PIX_FMT_GREY,
  94         },
  95         {
  96                 .name           = "Greyscale 10-bit (Y10 )",
  97                 .guid           = UVC_GUID_FORMAT_Y10,
  98                 .fcc            = V4L2_PIX_FMT_Y10,
  99         },
 100         {
 101                 .name           = "Greyscale 12-bit (Y12 )",
 102                 .guid           = UVC_GUID_FORMAT_Y12,
 103                 .fcc            = V4L2_PIX_FMT_Y12,
 104         },
 105         {
 106                 .name           = "Greyscale 16-bit (Y16 )",
 107                 .guid           = UVC_GUID_FORMAT_Y16,
 108                 .fcc            = V4L2_PIX_FMT_Y16,
 109         },
 110         {
 111                 .name           = "BGGR Bayer (BY8 )",
 112                 .guid           = UVC_GUID_FORMAT_BY8,
 113                 .fcc            = V4L2_PIX_FMT_SBGGR8,
 114         },
 115         {
 116                 .name           = "BGGR Bayer (BA81)",
 117                 .guid           = UVC_GUID_FORMAT_BA81,
 118                 .fcc            = V4L2_PIX_FMT_SBGGR8,
 119         },
 120         {
 121                 .name           = "GBRG Bayer (GBRG)",
 122                 .guid           = UVC_GUID_FORMAT_GBRG,
 123                 .fcc            = V4L2_PIX_FMT_SGBRG8,
 124         },
 125         {
 126                 .name           = "GRBG Bayer (GRBG)",
 127                 .guid           = UVC_GUID_FORMAT_GRBG,
 128                 .fcc            = V4L2_PIX_FMT_SGRBG8,
 129         },
 130         {
 131                 .name           = "RGGB Bayer (RGGB)",
 132                 .guid           = UVC_GUID_FORMAT_RGGB,
 133                 .fcc            = V4L2_PIX_FMT_SRGGB8,
 134         },
 135         {
 136                 .name           = "RGB565",
 137                 .guid           = UVC_GUID_FORMAT_RGBP,
 138                 .fcc            = V4L2_PIX_FMT_RGB565,
 139         },
 140         {
 141                 .name           = "H.264",
 142                 .guid           = UVC_GUID_FORMAT_H264,
 143                 .fcc            = V4L2_PIX_FMT_H264,
 144         },
 145 };
 146
 147 /* ------------------------------------------------------------------------
 148  * Utility functions
 149  */
 150
 151 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts,
 152                 __u8 epaddr)
 153 {
 154         struct usb_host_endpoint *ep;
 155         unsigned int i;
 156
 157         for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
 158                 ep = &alts->endpoint[i];
 159                 if (ep->desc.bEndpointAddress == epaddr)
 160                         return ep;
 161         }
 162
 163         return NULL;
 164 }
 165
 166 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16])
 167 {
 168         unsigned int len = ARRAY_SIZE(uvc_fmts);
 169         unsigned int i;
 170
 171         for (i = 0; i < len; ++i) {
 172                 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0)
 173                         return &uvc_fmts[i];
 174         }
 175
 176         return NULL;
 177 }
 178
 179 static __u32 uvc_colorspace(const __u8 primaries)
 180 {
 181         static const __u8 colorprimaries[] = {
 182                 0,
 183                 V4L2_COLORSPACE_SRGB,
 184                 V4L2_COLORSPACE_470_SYSTEM_M,
 185                 V4L2_COLORSPACE_470_SYSTEM_BG,
 186                 V4L2_COLORSPACE_SMPTE170M,
 187                 V4L2_COLORSPACE_SMPTE240M,
 188         };
 189
 190         if (primaries < ARRAY_SIZE(colorprimaries))
 191                 return colorprimaries[primaries];
 192
 193         return 0;
 194 }
 195
 196 /* Simplify a fraction using a simple continued fraction decomposition. The
 197  * idea here is to convert fractions such as 333333/10000000 to 1/30 using
 198  * 32 bit arithmetic only. The algorithm is not perfect and relies upon two
 199  * arbitrary parameters to remove non-significative terms from the simple
 200  * continued fraction decomposition. Using 8 and 333 for n_terms and threshold
 201  * respectively seems to give nice results.
 202  */
 203 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator,
 204                 unsigned int n_terms, unsigned int threshold)
 205 {
 206         uint32_t *an;
 207         uint32_t x, y, r;
 208         unsigned int i, n;
 209
 210         an = kmalloc(n_terms * sizeof *an, GFP_KERNEL);
 211         if (an == NULL)
 212                 return;
 213
 214         /* Convert the fraction to a simple continued fraction. See
 215          * http://mathforum.org/dr.math/faq/faq.fractions.html
 216          * Stop if the current term is bigger than or equal to the given
 217          * threshold.
 218          */
 219         x = *numerator;
 220         y = *denominator;
 221
 222         for (n = 0; n < n_terms && y != 0; ++n) {
 223                 an[n] = x / y;
 224                 if (an[n] >= threshold) {
 225                         if (n < 2)
 226                                 n++;
 227                         break;
 228                 }
 229
 230                 r = x - an[n] * y;
 231                 x = y;
 232                 y = r;
 233         }
 234
 235         /* Expand the simple continued fraction back to an integer fraction. */
 236         x = 0;
 237         y = 1;
 238
 239         for (i = n; i > 0; --i) {
 240                 r = y;
 241                 y = an[i-1] * y + x;
 242                 x = r;
 243         }
 244
 245         *numerator = y;
 246         *denominator = x;
 247         kfree(an);
 248 }
 249
 250 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is
 251  * to compute numerator / denominator * 10000000 using 32 bit fixed point
 252  * arithmetic only.
 253  */
 254 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator)
 255 {
 256         uint32_t multiplier;
 257
 258         /* Saturate the result if the operation would overflow. */
 259         if (denominator == 0 ||
 260             numerator/denominator >= ((uint32_t)-1)/10000000)
 261                 return (uint32_t)-1;
 262
 263         /* Divide both the denominator and the multiplier by two until
 264          * numerator * multiplier doesn't overflow. If anyone knows a better
 265          * algorithm please let me know.
 266          */
 267         multiplier = 10000000;
 268         while (numerator > ((uint32_t)-1)/multiplier) {
 269                 multiplier /= 2;
 270                 denominator /= 2;
 271         }
 272
 273         return denominator ? numerator * multiplier / denominator : 0;
 274 }
 275
 276 /* ------------------------------------------------------------------------
 277  * Terminal and unit management
 278  */
 279
 280 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id)
 281 {
 282         struct uvc_entity *entity;
 283
 284         list_for_each_entry(entity, &dev->entities, list) {
 285                 if (entity->id == id)
 286                         return entity;
 287         }
 288
 289         return NULL;
 290 }
 291
 292 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev,
 293         int id, struct uvc_entity *entity)
 294 {
 295         unsigned int i;
 296
 297         if (entity == NULL)
 298                 entity = list_entry(&dev->entities, struct uvc_entity, list);
 299
 300         list_for_each_entry_continue(entity, &dev->entities, list) {
 301                 for (i = 0; i < entity->bNrInPins; ++i)
 302                         if (entity->baSourceID[i] == id)
 303                                 return entity;
 304         }
 305
 306         return NULL;
 307 }
 308
 309 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id)
 310 {
 311         struct uvc_streaming *stream;
 312
 313         list_for_each_entry(stream, &dev->streams, list) {
 314                 if (stream->header.bTerminalLink == id)
 315                         return stream;
 316         }
 317
 318         return NULL;
 319 }
 320
 321 /* ------------------------------------------------------------------------
 322  * Descriptors parsing
 323  */
 324
 325 static int uvc_parse_format(struct uvc_device *dev,
 326         struct uvc_streaming *streaming, struct uvc_format *format,
 327         __u32 **intervals, unsigned char *buffer, int buflen)
 328 {
 329         struct usb_interface *intf = streaming->intf;
 330         struct usb_host_interface *alts = intf->cur_altsetting;
 331         struct uvc_format_desc *fmtdesc;
 332         struct uvc_frame *frame;
 333         const unsigned char *start = buffer;
 334         unsigned int width_multiplier = 1;
 335         unsigned int interval;
 336         unsigned int i, n;
 337         __u8 ftype;
 338
 339         format->type = buffer[2];
 340         format->index = buffer[3];
 341
 342         switch (buffer[2]) {
 343         case UVC_VS_FORMAT_UNCOMPRESSED:
 344         case UVC_VS_FORMAT_FRAME_BASED:
 345                 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28;
 346                 if (buflen < n) {
 347                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 348                                "interface %d FORMAT error\n",
 349                                dev->udev->devnum,
 350                                alts->desc.bInterfaceNumber);
 351                         return -EINVAL;
 352                 }
 353
 354                 /* Find the format descriptor from its GUID. */
 355                 fmtdesc = uvc_format_by_guid(&buffer[5]);
 356
 357                 if (fmtdesc != NULL) {
 358                         strlcpy(format->name, fmtdesc->name,
 359                                 sizeof format->name);
 360                         format->fcc = fmtdesc->fcc;
 361                 } else {
 362                         uvc_printk(KERN_INFO, "Unknown video format %pUl\n",
 363                                 &buffer[5]);
 364                         snprintf(format->name, sizeof(format->name), "%pUl\n",
 365                                 &buffer[5]);
 366                         format->fcc = 0;
 367                 }
 368
 369                 format->bpp = buffer[21];
 370
 371                 /* Some devices report a format that doesn't match what they
 372                  * really send.
 373                  */
 374                 if (dev->quirks & UVC_QUIRK_FORCE_Y8) {
 375                         if (format->fcc == V4L2_PIX_FMT_YUYV) {
 376                                 strlcpy(format->name, "Greyscale 8-bit (Y8  )",
 377                                         sizeof(format->name));
 378                                 format->fcc = V4L2_PIX_FMT_GREY;
 379                                 format->bpp = 8;
 380                                 width_multiplier = 2;
 381                         }
 382                 }
 383
 384                 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) {
 385                         ftype = UVC_VS_FRAME_UNCOMPRESSED;
 386                 } else {
 387                         ftype = UVC_VS_FRAME_FRAME_BASED;
 388                         if (buffer[27])
 389                                 format->flags = UVC_FMT_FLAG_COMPRESSED;
 390                 }
 391                 break;
 392
 393         case UVC_VS_FORMAT_MJPEG:
 394                 if (buflen < 11) {
 395                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 396                                "interface %d FORMAT error\n",
 397                                dev->udev->devnum,
 398                                alts->desc.bInterfaceNumber);
 399                         return -EINVAL;
 400                 }
 401
 402                 strlcpy(format->name, "MJPEG", sizeof format->name);
 403                 format->fcc = V4L2_PIX_FMT_MJPEG;
 404                 format->flags = UVC_FMT_FLAG_COMPRESSED;
 405                 format->bpp = 0;
 406                 ftype = UVC_VS_FRAME_MJPEG;
 407                 break;
 408
 409         case UVC_VS_FORMAT_DV:
 410                 if (buflen < 9) {
 411                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 412                                "interface %d FORMAT error\n",
 413                                dev->udev->devnum,
 414                                alts->desc.bInterfaceNumber);
 415                         return -EINVAL;
 416                 }
 417
 418                 switch (buffer[8] & 0x7f) {
 419                 case 0:
 420                         strlcpy(format->name, "SD-DV", sizeof format->name);
 421                         break;
 422                 case 1:
 423                         strlcpy(format->name, "SDL-DV", sizeof format->name);
 424                         break;
 425                 case 2:
 426                         strlcpy(format->name, "HD-DV", sizeof format->name);
 427                         break;
 428                 default:
 429                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 430                                "interface %d: unknown DV format %u\n",
 431                                dev->udev->devnum,
 432                                alts->desc.bInterfaceNumber, buffer[8]);
 433                         return -EINVAL;
 434                 }
 435
 436                 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz",
 437                         sizeof format->name);
 438
 439                 format->fcc = V4L2_PIX_FMT_DV;
 440                 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM;
 441                 format->bpp = 0;
 442                 ftype = 0;
 443
 444                 /* Create a dummy frame descriptor. */
 445                 frame = &format->frame[0];
 446                 memset(&format->frame[0], 0, sizeof format->frame[0]);
 447                 frame->bFrameIntervalType = 1;
 448                 frame->dwDefaultFrameInterval = 1;
 449                 frame->dwFrameInterval = *intervals;
 450                 *(*intervals)++ = 1;
 451                 format->nframes = 1;
 452                 break;
 453
 454         case UVC_VS_FORMAT_MPEG2TS:
 455         case UVC_VS_FORMAT_STREAM_BASED:
 456                 /* Not supported yet. */
 457         default:
 458                 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 459                        "interface %d unsupported format %u\n",
 460                        dev->udev->devnum, alts->desc.bInterfaceNumber,
 461                        buffer[2]);
 462                 return -EINVAL;
 463         }
 464
 465         uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name);
 466
 467         buflen -= buffer[0];
 468         buffer += buffer[0];
 469
 470         /* Parse the frame descriptors. Only uncompressed, MJPEG and frame
 471          * based formats have frame descriptors.
 472          */
 473         while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
 474                buffer[2] == ftype) {
 475                 frame = &format->frame[format->nframes];
 476                 if (ftype != UVC_VS_FRAME_FRAME_BASED)
 477                         n = buflen > 25 ? buffer[25] : 0;
 478                 else
 479                         n = buflen > 21 ? buffer[21] : 0;
 480
 481                 n = n ? n : 3;
 482
 483                 if (buflen < 26 + 4*n) {
 484                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 485                                "interface %d FRAME error\n", dev->udev->devnum,
 486                                alts->desc.bInterfaceNumber);
 487                         return -EINVAL;
 488                 }
 489
 490                 frame->bFrameIndex = buffer[3];
 491                 frame->bmCapabilities = buffer[4];
 492                 frame->wWidth = get_unaligned_le16(&buffer[5])
 493                               * width_multiplier;
 494                 frame->wHeight = get_unaligned_le16(&buffer[7]);
 495                 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]);
 496                 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]);
 497                 if (ftype != UVC_VS_FRAME_FRAME_BASED) {
 498                         frame->dwMaxVideoFrameBufferSize =
 499                                 get_unaligned_le32(&buffer[17]);
 500                         frame->dwDefaultFrameInterval =
 501                                 get_unaligned_le32(&buffer[21]);
 502                         frame->bFrameIntervalType = buffer[25];
 503                 } else {
 504                         frame->dwMaxVideoFrameBufferSize = 0;
 505                         frame->dwDefaultFrameInterval =
 506                                 get_unaligned_le32(&buffer[17]);
 507                         frame->bFrameIntervalType = buffer[21];
 508                 }
 509                 frame->dwFrameInterval = *intervals;
 510
 511                 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize
 512                  * completely. Observed behaviours range from setting the
 513                  * value to 1.1x the actual frame size to hardwiring the
 514                  * 16 low bits to 0. This results in a higher than necessary
 515                  * memory usage as well as a wrong image size information. For
 516                  * uncompressed formats this can be fixed by computing the
 517                  * value from the frame size.
 518                  */
 519                 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED))
 520                         frame->dwMaxVideoFrameBufferSize = format->bpp
 521                                 * frame->wWidth * frame->wHeight / 8;
 522
 523                 /* Some bogus devices report dwMinFrameInterval equal to
 524                  * dwMaxFrameInterval and have dwFrameIntervalStep set to
 525                  * zero. Setting all null intervals to 1 fixes the problem and
 526                  * some other divisions by zero that could happen.
 527                  */
 528                 for (i = 0; i < n; ++i) {
 529                         interval = get_unaligned_le32(&buffer[26+4*i]);
 530                         *(*intervals)++ = interval ? interval : 1;
 531                 }
 532
 533                 /* Make sure that the default frame interval stays between
 534                  * the boundaries.
 535                  */
 536                 n -= frame->bFrameIntervalType ? 1 : 2;
 537                 frame->dwDefaultFrameInterval =
 538                         min(frame->dwFrameInterval[n],
 539                             max(frame->dwFrameInterval[0],
 540                                 frame->dwDefaultFrameInterval));
 541
 542                 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) {
 543                         frame->bFrameIntervalType = 1;
 544                         frame->dwFrameInterval[0] =
 545                                 frame->dwDefaultFrameInterval;
 546                 }
 547
 548                 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n",
 549                         frame->wWidth, frame->wHeight,
 550                         10000000/frame->dwDefaultFrameInterval,
 551                         (100000000/frame->dwDefaultFrameInterval)%10);
 552
 553                 format->nframes++;
 554                 buflen -= buffer[0];
 555                 buffer += buffer[0];
 556         }
 557
 558         if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
 559             buffer[2] == UVC_VS_STILL_IMAGE_FRAME) {
 560                 buflen -= buffer[0];
 561                 buffer += buffer[0];
 562         }
 563
 564         if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE &&
 565             buffer[2] == UVC_VS_COLORFORMAT) {
 566                 if (buflen < 6) {
 567                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 568                                "interface %d COLORFORMAT error\n",
 569                                dev->udev->devnum,
 570                                alts->desc.bInterfaceNumber);
 571                         return -EINVAL;
 572                 }
 573
 574                 format->colorspace = uvc_colorspace(buffer[3]);
 575
 576                 buflen -= buffer[0];
 577                 buffer += buffer[0];
 578         }
 579
 580         return buffer - start;
 581 }
 582
 583 static int uvc_parse_streaming(struct uvc_device *dev,
 584         struct usb_interface *intf)
 585 {
 586         struct uvc_streaming *streaming = NULL;
 587         struct uvc_format *format;
 588         struct uvc_frame *frame;
 589         struct usb_host_interface *alts = &intf->altsetting[0];
 590         unsigned char *_buffer, *buffer = alts->extra;
 591         int _buflen, buflen = alts->extralen;
 592         unsigned int nformats = 0, nframes = 0, nintervals = 0;
 593         unsigned int size, i, n, p;
 594         __u32 *interval;
 595         __u16 psize;
 596         int ret = -EINVAL;
 597
 598         if (intf->cur_altsetting->desc.bInterfaceSubClass
 599                 != UVC_SC_VIDEOSTREAMING) {
 600                 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a "
 601                         "video streaming interface\n", dev->udev->devnum,
 602                         intf->altsetting[0].desc.bInterfaceNumber);
 603                 return -EINVAL;
 604         }
 605
 606         if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) {
 607                 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already "
 608                         "claimed\n", dev->udev->devnum,
 609                         intf->altsetting[0].desc.bInterfaceNumber);
 610                 return -EINVAL;
 611         }
 612
 613         streaming = kzalloc(sizeof *streaming, GFP_KERNEL);
 614         if (streaming == NULL) {
 615                 usb_driver_release_interface(&uvc_driver.driver, intf);
 616                 return -EINVAL;
 617         }
 618
 619         mutex_init(&streaming->mutex);
 620         streaming->dev = dev;
 621         streaming->intf = usb_get_intf(intf);
 622         streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
 623
 624         /* The Pico iMage webcam has its class-specific interface descriptors
 625          * after the endpoint descriptors.
 626          */
 627         if (buflen == 0) {
 628                 for (i = 0; i < alts->desc.bNumEndpoints; ++i) {
 629                         struct usb_host_endpoint *ep = &alts->endpoint[i];
 630
 631                         if (ep->extralen == 0)
 632                                 continue;
 633
 634                         if (ep->extralen > 2 &&
 635                             ep->extra[1] == USB_DT_CS_INTERFACE) {
 636                                 uvc_trace(UVC_TRACE_DESCR, "trying extra data "
 637                                         "from endpoint %u.\n", i);
 638                                 buffer = alts->endpoint[i].extra;
 639                                 buflen = alts->endpoint[i].extralen;
 640                                 break;
 641                         }
 642                 }
 643         }
 644
 645         /* Skip the standard interface descriptors. */
 646         while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) {
 647                 buflen -= buffer[0];
 648                 buffer += buffer[0];
 649         }
 650
 651         if (buflen <= 2) {
 652                 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming "
 653                         "interface descriptors found.\n");
 654                 goto error;
 655         }
 656
 657         /* Parse the header descriptor. */
 658         switch (buffer[2]) {
 659         case UVC_VS_OUTPUT_HEADER:
 660                 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 661                 size = 9;
 662                 break;
 663
 664         case UVC_VS_INPUT_HEADER:
 665                 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 666                 size = 13;
 667                 break;
 668
 669         default:
 670                 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
 671                         "%d HEADER descriptor not found.\n", dev->udev->devnum,
 672                         alts->desc.bInterfaceNumber);
 673                 goto error;
 674         }
 675
 676         p = buflen >= 4 ? buffer[3] : 0;
 677         n = buflen >= size ? buffer[size-1] : 0;
 678
 679         if (buflen < size + p*n) {
 680                 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 681                         "interface %d HEADER descriptor is invalid.\n",
 682                         dev->udev->devnum, alts->desc.bInterfaceNumber);
 683                 goto error;
 684         }
 685
 686         streaming->header.bNumFormats = p;
 687         streaming->header.bEndpointAddress = buffer[6];
 688         if (buffer[2] == UVC_VS_INPUT_HEADER) {
 689                 streaming->header.bmInfo = buffer[7];
 690                 streaming->header.bTerminalLink = buffer[8];
 691                 streaming->header.bStillCaptureMethod = buffer[9];
 692                 streaming->header.bTriggerSupport = buffer[10];
 693                 streaming->header.bTriggerUsage = buffer[11];
 694         } else {
 695                 streaming->header.bTerminalLink = buffer[7];
 696         }
 697         streaming->header.bControlSize = n;
 698
 699         streaming->header.bmaControls = kmemdup(&buffer[size], p * n,
 700                                                 GFP_KERNEL);
 701         if (streaming->header.bmaControls == NULL) {
 702                 ret = -ENOMEM;
 703                 goto error;
 704         }
 705
 706         buflen -= buffer[0];
 707         buffer += buffer[0];
 708
 709         _buffer = buffer;
 710         _buflen = buflen;
 711
 712         /* Count the format and frame descriptors. */
 713         while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) {
 714                 switch (_buffer[2]) {
 715                 case UVC_VS_FORMAT_UNCOMPRESSED:
 716                 case UVC_VS_FORMAT_MJPEG:
 717                 case UVC_VS_FORMAT_FRAME_BASED:
 718                         nformats++;
 719                         break;
 720
 721                 case UVC_VS_FORMAT_DV:
 722                         /* DV format has no frame descriptor. We will create a
 723                          * dummy frame descriptor with a dummy frame interval.
 724                          */
 725                         nformats++;
 726                         nframes++;
 727                         nintervals++;
 728                         break;
 729
 730                 case UVC_VS_FORMAT_MPEG2TS:
 731                 case UVC_VS_FORMAT_STREAM_BASED:
 732                         uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming "
 733                                 "interface %d FORMAT %u is not supported.\n",
 734                                 dev->udev->devnum,
 735                                 alts->desc.bInterfaceNumber, _buffer[2]);
 736                         break;
 737
 738                 case UVC_VS_FRAME_UNCOMPRESSED:
 739                 case UVC_VS_FRAME_MJPEG:
 740                         nframes++;
 741                         if (_buflen > 25)
 742                                 nintervals += _buffer[25] ? _buffer[25] : 3;
 743                         break;
 744
 745                 case UVC_VS_FRAME_FRAME_BASED:
 746                         nframes++;
 747                         if (_buflen > 21)
 748                                 nintervals += _buffer[21] ? _buffer[21] : 3;
 749                         break;
 750                 }
 751
 752                 _buflen -= _buffer[0];
 753                 _buffer += _buffer[0];
 754         }
 755
 756         if (nformats == 0) {
 757                 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
 758                         "%d has no supported formats defined.\n",
 759                         dev->udev->devnum, alts->desc.bInterfaceNumber);
 760                 goto error;
 761         }
 762
 763         size = nformats * sizeof *format + nframes * sizeof *frame
 764              + nintervals * sizeof *interval;
 765         format = kzalloc(size, GFP_KERNEL);
 766         if (format == NULL) {
 767                 ret = -ENOMEM;
 768                 goto error;
 769         }
 770
 771         frame = (struct uvc_frame *)&format[nformats];
 772         interval = (__u32 *)&frame[nframes];
 773
 774         streaming->format = format;
 775         streaming->nformats = nformats;
 776
 777         /* Parse the format descriptors. */
 778         while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) {
 779                 switch (buffer[2]) {
 780                 case UVC_VS_FORMAT_UNCOMPRESSED:
 781                 case UVC_VS_FORMAT_MJPEG:
 782                 case UVC_VS_FORMAT_DV:
 783                 case UVC_VS_FORMAT_FRAME_BASED:
 784                         format->frame = frame;
 785                         ret = uvc_parse_format(dev, streaming, format,
 786                                 &interval, buffer, buflen);
 787                         if (ret < 0)
 788                                 goto error;
 789
 790                         frame += format->nframes;
 791                         format++;
 792
 793                         buflen -= ret;
 794                         buffer += ret;
 795                         continue;
 796
 797                 default:
 798                         break;
 799                 }
 800
 801                 buflen -= buffer[0];
 802                 buffer += buffer[0];
 803         }
 804
 805         if (buflen)
 806                 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface "
 807                         "%d has %u bytes of trailing descriptor garbage.\n",
 808                         dev->udev->devnum, alts->desc.bInterfaceNumber, buflen);
 809
 810         /* Parse the alternate settings to find the maximum bandwidth. */
 811         for (i = 0; i < intf->num_altsetting; ++i) {
 812                 struct usb_host_endpoint *ep;
 813                 alts = &intf->altsetting[i];
 814                 ep = uvc_find_endpoint(alts,
 815                                 streaming->header.bEndpointAddress);
 816                 if (ep == NULL)
 817                         continue;
 818
 819                 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
 820                 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
 821                 if (psize > streaming->maxpsize)
 822                         streaming->maxpsize = psize;
 823         }
 824
 825         list_add_tail(&streaming->list, &dev->streams);
 826         return 0;
 827
 828 error:
 829         usb_driver_release_interface(&uvc_driver.driver, intf);
 830         usb_put_intf(intf);
 831         kfree(streaming->format);
 832         kfree(streaming->header.bmaControls);
 833         kfree(streaming);
 834         return ret;
 835 }
 836
 837 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id,
 838                 unsigned int num_pads, unsigned int extra_size)
 839 {
 840         struct uvc_entity *entity;
 841         unsigned int num_inputs;
 842         unsigned int size;
 843         unsigned int i;
 844
 845         extra_size = ALIGN(extra_size, sizeof(*entity->pads));
 846         num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1;
 847         size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads
 848              + num_inputs;
 849         entity = kzalloc(size, GFP_KERNEL);
 850         if (entity == NULL)
 851                 return NULL;
 852
 853         entity->id = id;
 854         entity->type = type;
 855
 856         entity->num_links = 0;
 857         entity->num_pads = num_pads;
 858         entity->pads = ((void *)(entity + 1)) + extra_size;
 859
 860         for (i = 0; i < num_inputs; ++i)
 861                 entity->pads[i].flags = MEDIA_PAD_FL_SINK;
 862         if (!UVC_ENTITY_IS_OTERM(entity))
 863                 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE;
 864
 865         entity->bNrInPins = num_inputs;
 866         entity->baSourceID = (__u8 *)(&entity->pads[num_pads]);
 867
 868         return entity;
 869 }
 870
 871 /* Parse vendor-specific extensions. */
 872 static int uvc_parse_vendor_control(struct uvc_device *dev,
 873         const unsigned char *buffer, int buflen)
 874 {
 875         struct usb_device *udev = dev->udev;
 876         struct usb_host_interface *alts = dev->intf->cur_altsetting;
 877         struct uvc_entity *unit;
 878         unsigned int n, p;
 879         int handled = 0;
 880
 881         switch (le16_to_cpu(dev->udev->descriptor.idVendor)) {
 882         case 0x046d:            /* Logitech */
 883                 if (buffer[1] != 0x41 || buffer[2] != 0x01)
 884                         break;
 885
 886                 /* Logitech implements several vendor specific functions
 887                  * through vendor specific extension units (LXU).
 888                  *
 889                  * The LXU descriptors are similar to XU descriptors
 890                  * (see "USB Device Video Class for Video Devices", section
 891                  * 3.7.2.6 "Extension Unit Descriptor") with the following
 892                  * differences:
 893                  *
 894                  * ----------------------------------------------------------
 895                  * 0            bLength         1        Number
 896                  *      Size of this descriptor, in bytes: 24+p+n*2
 897                  * ----------------------------------------------------------
 898                  * 23+p+n       bmControlsType  N       Bitmap
 899                  *      Individual bits in the set are defined:
 900                  *      0: Absolute
 901                  *      1: Relative
 902                  *
 903                  *      This bitset is mapped exactly the same as bmControls.
 904                  * ----------------------------------------------------------
 905                  * 23+p+n*2     bReserved       1       Boolean
 906                  * ----------------------------------------------------------
 907                  * 24+p+n*2     iExtension      1       Index
 908                  *      Index of a string descriptor that describes this
 909                  *      extension unit.
 910                  * ----------------------------------------------------------
 911                  */
 912                 p = buflen >= 22 ? buffer[21] : 0;
 913                 n = buflen >= 25 + p ? buffer[22+p] : 0;
 914
 915                 if (buflen < 25 + p + 2*n) {
 916                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
 917                                 "interface %d EXTENSION_UNIT error\n",
 918                                 udev->devnum, alts->desc.bInterfaceNumber);
 919                         break;
 920                 }
 921
 922                 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3],
 923                                         p + 1, 2*n);
 924                 if (unit == NULL)
 925                         return -ENOMEM;
 926
 927                 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
 928                 unit->extension.bNumControls = buffer[20];
 929                 memcpy(unit->baSourceID, &buffer[22], p);
 930                 unit->extension.bControlSize = buffer[22+p];
 931                 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit);
 932                 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit)
 933                                                + n;
 934                 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n);
 935
 936                 if (buffer[24+p+2*n] != 0)
 937                         usb_string(udev, buffer[24+p+2*n], unit->name,
 938                                    sizeof unit->name);
 939                 else
 940                         sprintf(unit->name, "Extension %u", buffer[3]);
 941
 942                 list_add_tail(&unit->list, &dev->entities);
 943                 handled = 1;
 944                 break;
 945         }
 946
 947         return handled;
 948 }
 949
 950 static int uvc_parse_standard_control(struct uvc_device *dev,
 951         const unsigned char *buffer, int buflen)
 952 {
 953         struct usb_device *udev = dev->udev;
 954         struct uvc_entity *unit, *term;
 955         struct usb_interface *intf;
 956         struct usb_host_interface *alts = dev->intf->cur_altsetting;
 957         unsigned int i, n, p, len;
 958         __u16 type;
 959
 960         switch (buffer[2]) {
 961         case UVC_VC_HEADER:
 962                 n = buflen >= 12 ? buffer[11] : 0;
 963
 964                 if (buflen < 12 + n) {
 965                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
 966                                 "interface %d HEADER error\n", udev->devnum,
 967                                 alts->desc.bInterfaceNumber);
 968                         return -EINVAL;
 969                 }
 970
 971                 dev->uvc_version = get_unaligned_le16(&buffer[3]);
 972                 dev->clock_frequency = get_unaligned_le32(&buffer[7]);
 973
 974                 /* Parse all USB Video Streaming interfaces. */
 975                 for (i = 0; i < n; ++i) {
 976                         intf = usb_ifnum_to_if(udev, buffer[12+i]);
 977                         if (intf == NULL) {
 978                                 uvc_trace(UVC_TRACE_DESCR, "device %d "
 979                                         "interface %d doesn't exists\n",
 980                                         udev->devnum, i);
 981                                 continue;
 982                         }
 983
 984                         uvc_parse_streaming(dev, intf);
 985                 }
 986                 break;
 987
 988         case UVC_VC_INPUT_TERMINAL:
 989                 if (buflen < 8) {
 990                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
 991                                 "interface %d INPUT_TERMINAL error\n",
 992                                 udev->devnum, alts->desc.bInterfaceNumber);
 993                         return -EINVAL;
 994                 }
 995
 996                 /* Make sure the terminal type MSB is not null, otherwise it
 997                  * could be confused with a unit.
 998                  */
 999                 type = get_unaligned_le16(&buffer[4]);
1000                 if ((type & 0xff00) == 0) {
1001                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1002                                 "interface %d INPUT_TERMINAL %d has invalid "
1003                                 "type 0x%04x, skipping\n", udev->devnum,
1004                                 alts->desc.bInterfaceNumber,
1005                                 buffer[3], type);
1006                         return 0;
1007                 }
1008
1009                 n = 0;
1010                 p = 0;
1011                 len = 8;
1012
1013                 if (type == UVC_ITT_CAMERA) {
1014                         n = buflen >= 15 ? buffer[14] : 0;
1015                         len = 15;
1016
1017                 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1018                         n = buflen >= 9 ? buffer[8] : 0;
1019                         p = buflen >= 10 + n ? buffer[9+n] : 0;
1020                         len = 10;
1021                 }
1022
1023                 if (buflen < len + n + p) {
1024                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1025                                 "interface %d INPUT_TERMINAL error\n",
1026                                 udev->devnum, alts->desc.bInterfaceNumber);
1027                         return -EINVAL;
1028                 }
1029
1030                 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3],
1031                                         1, n + p);
1032                 if (term == NULL)
1033                         return -ENOMEM;
1034
1035                 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) {
1036                         term->camera.bControlSize = n;
1037                         term->camera.bmControls = (__u8 *)term + sizeof *term;
1038                         term->camera.wObjectiveFocalLengthMin =
1039                                 get_unaligned_le16(&buffer[8]);
1040                         term->camera.wObjectiveFocalLengthMax =
1041                                 get_unaligned_le16(&buffer[10]);
1042                         term->camera.wOcularFocalLength =
1043                                 get_unaligned_le16(&buffer[12]);
1044                         memcpy(term->camera.bmControls, &buffer[15], n);
1045                 } else if (UVC_ENTITY_TYPE(term) ==
1046                            UVC_ITT_MEDIA_TRANSPORT_INPUT) {
1047                         term->media.bControlSize = n;
1048                         term->media.bmControls = (__u8 *)term + sizeof *term;
1049                         term->media.bTransportModeSize = p;
1050                         term->media.bmTransportModes = (__u8 *)term
1051                                                      + sizeof *term + n;
1052                         memcpy(term->media.bmControls, &buffer[9], n);
1053                         memcpy(term->media.bmTransportModes, &buffer[10+n], p);
1054                 }
1055
1056                 if (buffer[7] != 0)
1057                         usb_string(udev, buffer[7], term->name,
1058                                    sizeof term->name);
1059                 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA)
1060                         sprintf(term->name, "Camera %u", buffer[3]);
1061                 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT)
1062                         sprintf(term->name, "Media %u", buffer[3]);
1063                 else
1064                         sprintf(term->name, "Input %u", buffer[3]);
1065
1066                 list_add_tail(&term->list, &dev->entities);
1067                 break;
1068
1069         case UVC_VC_OUTPUT_TERMINAL:
1070                 if (buflen < 9) {
1071                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1072                                 "interface %d OUTPUT_TERMINAL error\n",
1073                                 udev->devnum, alts->desc.bInterfaceNumber);
1074                         return -EINVAL;
1075                 }
1076
1077                 /* Make sure the terminal type MSB is not null, otherwise it
1078                  * could be confused with a unit.
1079                  */
1080                 type = get_unaligned_le16(&buffer[4]);
1081                 if ((type & 0xff00) == 0) {
1082                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1083                                 "interface %d OUTPUT_TERMINAL %d has invalid "
1084                                 "type 0x%04x, skipping\n", udev->devnum,
1085                                 alts->desc.bInterfaceNumber, buffer[3], type);
1086                         return 0;
1087                 }
1088
1089                 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3],
1090                                         1, 0);
1091                 if (term == NULL)
1092                         return -ENOMEM;
1093
1094                 memcpy(term->baSourceID, &buffer[7], 1);
1095
1096                 if (buffer[8] != 0)
1097                         usb_string(udev, buffer[8], term->name,
1098                                    sizeof term->name);
1099                 else
1100                         sprintf(term->name, "Output %u", buffer[3]);
1101
1102                 list_add_tail(&term->list, &dev->entities);
1103                 break;
1104
1105         case UVC_VC_SELECTOR_UNIT:
1106                 p = buflen >= 5 ? buffer[4] : 0;
1107
1108                 if (buflen < 5 || buflen < 6 + p) {
1109                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1110                                 "interface %d SELECTOR_UNIT error\n",
1111                                 udev->devnum, alts->desc.bInterfaceNumber);
1112                         return -EINVAL;
1113                 }
1114
1115                 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0);
1116                 if (unit == NULL)
1117                         return -ENOMEM;
1118
1119                 memcpy(unit->baSourceID, &buffer[5], p);
1120
1121                 if (buffer[5+p] != 0)
1122                         usb_string(udev, buffer[5+p], unit->name,
1123                                    sizeof unit->name);
1124                 else
1125                         sprintf(unit->name, "Selector %u", buffer[3]);
1126
1127                 list_add_tail(&unit->list, &dev->entities);
1128                 break;
1129
1130         case UVC_VC_PROCESSING_UNIT:
1131                 n = buflen >= 8 ? buffer[7] : 0;
1132                 p = dev->uvc_version >= 0x0110 ? 10 : 9;
1133
1134                 if (buflen < p + n) {
1135                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1136                                 "interface %d PROCESSING_UNIT error\n",
1137                                 udev->devnum, alts->desc.bInterfaceNumber);
1138                         return -EINVAL;
1139                 }
1140
1141                 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n);
1142                 if (unit == NULL)
1143                         return -ENOMEM;
1144
1145                 memcpy(unit->baSourceID, &buffer[4], 1);
1146                 unit->processing.wMaxMultiplier =
1147                         get_unaligned_le16(&buffer[5]);
1148                 unit->processing.bControlSize = buffer[7];
1149                 unit->processing.bmControls = (__u8 *)unit + sizeof *unit;
1150                 memcpy(unit->processing.bmControls, &buffer[8], n);
1151                 if (dev->uvc_version >= 0x0110)
1152                         unit->processing.bmVideoStandards = buffer[9+n];
1153
1154                 if (buffer[8+n] != 0)
1155                         usb_string(udev, buffer[8+n], unit->name,
1156                                    sizeof unit->name);
1157                 else
1158                         sprintf(unit->name, "Processing %u", buffer[3]);
1159
1160                 list_add_tail(&unit->list, &dev->entities);
1161                 break;
1162
1163         case UVC_VC_EXTENSION_UNIT:
1164                 p = buflen >= 22 ? buffer[21] : 0;
1165                 n = buflen >= 24 + p ? buffer[22+p] : 0;
1166
1167                 if (buflen < 24 + p + n) {
1168                         uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol "
1169                                 "interface %d EXTENSION_UNIT error\n",
1170                                 udev->devnum, alts->desc.bInterfaceNumber);
1171                         return -EINVAL;
1172                 }
1173
1174                 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n);
1175                 if (unit == NULL)
1176                         return -ENOMEM;
1177
1178                 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16);
1179                 unit->extension.bNumControls = buffer[20];
1180                 memcpy(unit->baSourceID, &buffer[22], p);
1181                 unit->extension.bControlSize = buffer[22+p];
1182                 unit->extension.bmControls = (__u8 *)unit + sizeof *unit;
1183                 memcpy(unit->extension.bmControls, &buffer[23+p], n);
1184
1185                 if (buffer[23+p+n] != 0)
1186                         usb_string(udev, buffer[23+p+n], unit->name,
1187                                    sizeof unit->name);
1188                 else
1189                         sprintf(unit->name, "Extension %u", buffer[3]);
1190
1191                 list_add_tail(&unit->list, &dev->entities);
1192                 break;
1193
1194         default:
1195                 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE "
1196                         "descriptor (%u)\n", buffer[2]);
1197                 break;
1198         }
1199
1200         return 0;
1201 }
1202
1203 static int uvc_parse_control(struct uvc_device *dev)
1204 {
1205         struct usb_host_interface *alts = dev->intf->cur_altsetting;
1206         unsigned char *buffer = alts->extra;
1207         int buflen = alts->extralen;
1208         int ret;
1209
1210         /* Parse the default alternate setting only, as the UVC specification
1211          * defines a single alternate setting, the default alternate setting
1212          * zero.
1213          */
1214
1215         while (buflen > 2) {
1216                 if (uvc_parse_vendor_control(dev, buffer, buflen) ||
1217                     buffer[1] != USB_DT_CS_INTERFACE)
1218                         goto next_descriptor;
1219
1220                 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0)
1221                         return ret;
1222
1223 next_descriptor:
1224                 buflen -= buffer[0];
1225                 buffer += buffer[0];
1226         }
1227
1228         /* Check if the optional status endpoint is present. Built-in iSight
1229          * webcams have an interrupt endpoint but spit proprietary data that
1230          * don't conform to the UVC status endpoint messages. Don't try to
1231          * handle the interrupt endpoint for those cameras.
1232          */
1233         if (alts->desc.bNumEndpoints == 1 &&
1234             !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) {
1235                 struct usb_host_endpoint *ep = &alts->endpoint[0];
1236                 struct usb_endpoint_descriptor *desc = &ep->desc;
1237
1238                 if (usb_endpoint_is_int_in(desc) &&
1239                     le16_to_cpu(desc->wMaxPacketSize) >= 8 &&
1240                     desc->bInterval != 0) {
1241                         uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint "
1242                                 "(addr %02x).\n", desc->bEndpointAddress);
1243                         dev->int_ep = ep;
1244                 }
1245         }
1246
1247         return 0;
1248 }
1249
1250 /* ------------------------------------------------------------------------
1251  * UVC device scan
1252  */
1253
1254 /*
1255  * Scan the UVC descriptors to locate a chain starting at an Output Terminal
1256  * and containing the following units:
1257  *
1258  * - one or more Output Terminals (USB Streaming or Display)
1259  * - zero or one Processing Unit
1260  * - zero, one or more single-input Selector Units
1261  * - zero or one multiple-input Selector Units, provided all inputs are
1262  *   connected to input terminals
1263  * - zero, one or mode single-input Extension Units
1264  * - one or more Input Terminals (Camera, External or USB Streaming)
1265  *
1266  * The terminal and units must match on of the following structures:
1267  *
1268  * ITT_*(0) -> +---------+    +---------+    +---------+ -> TT_STREAMING(0)
1269  * ...         | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} |    ...
1270  * ITT_*(n) -> +---------+    +---------+    +---------+ -> TT_STREAMING(n)
1271  *
1272  *                 +---------+    +---------+ -> OTT_*(0)
1273  * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} |    ...
1274  *                 +---------+    +---------+ -> OTT_*(n)
1275  *
1276  * The Processing Unit and Extension Units can be in any order. Additional
1277  * Extension Units connected to the main chain as single-unit branches are
1278  * also supported. Single-input Selector Units are ignored.
1279  */
1280 static int uvc_scan_chain_entity(struct uvc_video_chain *chain,
1281         struct uvc_entity *entity)
1282 {
1283         switch (UVC_ENTITY_TYPE(entity)) {
1284         case UVC_VC_EXTENSION_UNIT:
1285                 if (uvc_trace_param & UVC_TRACE_PROBE)
1286                         printk(" <- XU %d", entity->id);
1287
1288                 if (entity->bNrInPins != 1) {
1289                         uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more "
1290                                 "than 1 input pin.\n", entity->id);
1291                         return -1;
1292                 }
1293
1294                 break;
1295
1296         case UVC_VC_PROCESSING_UNIT:
1297                 if (uvc_trace_param & UVC_TRACE_PROBE)
1298                         printk(" <- PU %d", entity->id);
1299
1300                 if (chain->processing != NULL) {
1301                         uvc_trace(UVC_TRACE_DESCR, "Found multiple "
1302                                 "Processing Units in chain.\n");
1303                         return -1;
1304                 }
1305
1306                 chain->processing = entity;
1307                 break;
1308
1309         case UVC_VC_SELECTOR_UNIT:
1310                 if (uvc_trace_param & UVC_TRACE_PROBE)
1311                         printk(" <- SU %d", entity->id);
1312
1313                 /* Single-input selector units are ignored. */
1314                 if (entity->bNrInPins == 1)
1315                         break;
1316
1317                 if (chain->selector != NULL) {
1318                         uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector "
1319                                 "Units in chain.\n");
1320                         return -1;
1321                 }
1322
1323                 chain->selector = entity;
1324                 break;
1325
1326         case UVC_ITT_VENDOR_SPECIFIC:
1327         case UVC_ITT_CAMERA:
1328         case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1329                 if (uvc_trace_param & UVC_TRACE_PROBE)
1330                         printk(" <- IT %d\n", entity->id);
1331
1332                 break;
1333
1334         case UVC_OTT_VENDOR_SPECIFIC:
1335         case UVC_OTT_DISPLAY:
1336         case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1337                 if (uvc_trace_param & UVC_TRACE_PROBE)
1338                         printk(" OT %d", entity->id);
1339
1340                 break;
1341
1342         case UVC_TT_STREAMING:
1343                 if (UVC_ENTITY_IS_ITERM(entity)) {
1344                         if (uvc_trace_param & UVC_TRACE_PROBE)
1345                                 printk(" <- IT %d\n", entity->id);
1346                 } else {
1347                         if (uvc_trace_param & UVC_TRACE_PROBE)
1348                                 printk(" OT %d", entity->id);
1349                 }
1350
1351                 break;
1352
1353         default:
1354                 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type "
1355                         "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity));
1356                 return -1;
1357         }
1358
1359         list_add_tail(&entity->chain, &chain->entities);
1360         return 0;
1361 }
1362
1363 static int uvc_scan_chain_forward(struct uvc_video_chain *chain,
1364         struct uvc_entity *entity, struct uvc_entity *prev)
1365 {
1366         struct uvc_entity *forward;
1367         int found;
1368
1369         /* Forward scan */
1370         forward = NULL;
1371         found = 0;
1372
1373         while (1) {
1374                 forward = uvc_entity_by_reference(chain->dev, entity->id,
1375                         forward);
1376                 if (forward == NULL)
1377                         break;
1378                 if (forward == prev)
1379                         continue;
1380
1381                 switch (UVC_ENTITY_TYPE(forward)) {
1382                 case UVC_VC_EXTENSION_UNIT:
1383                         if (forward->bNrInPins != 1) {
1384                                 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d "
1385                                           "has more than 1 input pin.\n",
1386                                           entity->id);
1387                                 return -EINVAL;
1388                         }
1389
1390                         list_add_tail(&forward->chain, &chain->entities);
1391                         if (uvc_trace_param & UVC_TRACE_PROBE) {
1392                                 if (!found)
1393                                         printk(" (->");
1394
1395                                 printk(" XU %d", forward->id);
1396                                 found = 1;
1397                         }
1398                         break;
1399
1400                 case UVC_OTT_VENDOR_SPECIFIC:
1401                 case UVC_OTT_DISPLAY:
1402                 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1403                 case UVC_TT_STREAMING:
1404                         if (UVC_ENTITY_IS_ITERM(forward)) {
1405                                 uvc_trace(UVC_TRACE_DESCR, "Unsupported input "
1406                                         "terminal %u.\n", forward->id);
1407                                 return -EINVAL;
1408                         }
1409
1410                         list_add_tail(&forward->chain, &chain->entities);
1411                         if (uvc_trace_param & UVC_TRACE_PROBE) {
1412                                 if (!found)
1413                                         printk(" (->");
1414
1415                                 printk(" OT %d", forward->id);
1416                                 found = 1;
1417                         }
1418                         break;
1419                 }
1420         }
1421         if (found)
1422                 printk(")");
1423
1424         return 0;
1425 }
1426
1427 static int uvc_scan_chain_backward(struct uvc_video_chain *chain,
1428         struct uvc_entity **_entity)
1429 {
1430         struct uvc_entity *entity = *_entity;
1431         struct uvc_entity *term;
1432         int id = -EINVAL, i;
1433
1434         switch (UVC_ENTITY_TYPE(entity)) {
1435         case UVC_VC_EXTENSION_UNIT:
1436         case UVC_VC_PROCESSING_UNIT:
1437                 id = entity->baSourceID[0];
1438                 break;
1439
1440         case UVC_VC_SELECTOR_UNIT:
1441                 /* Single-input selector units are ignored. */
1442                 if (entity->bNrInPins == 1) {
1443                         id = entity->baSourceID[0];
1444                         break;
1445                 }
1446
1447                 if (uvc_trace_param & UVC_TRACE_PROBE)
1448                         printk(" <- IT");
1449
1450                 chain->selector = entity;
1451                 for (i = 0; i < entity->bNrInPins; ++i) {
1452                         id = entity->baSourceID[i];
1453                         term = uvc_entity_by_id(chain->dev, id);
1454                         if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) {
1455                                 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d "
1456                                         "input %d isn't connected to an "
1457                                         "input terminal\n", entity->id, i);
1458                                 return -1;
1459                         }
1460
1461                         if (uvc_trace_param & UVC_TRACE_PROBE)
1462                                 printk(" %d", term->id);
1463
1464                         list_add_tail(&term->chain, &chain->entities);
1465                         uvc_scan_chain_forward(chain, term, entity);
1466                 }
1467
1468                 if (uvc_trace_param & UVC_TRACE_PROBE)
1469                         printk("\n");
1470
1471                 id = 0;
1472                 break;
1473
1474         case UVC_ITT_VENDOR_SPECIFIC:
1475         case UVC_ITT_CAMERA:
1476         case UVC_ITT_MEDIA_TRANSPORT_INPUT:
1477         case UVC_OTT_VENDOR_SPECIFIC:
1478         case UVC_OTT_DISPLAY:
1479         case UVC_OTT_MEDIA_TRANSPORT_OUTPUT:
1480         case UVC_TT_STREAMING:
1481                 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0;
1482                 break;
1483         }
1484
1485         if (id <= 0) {
1486                 *_entity = NULL;
1487                 return id;
1488         }
1489
1490         entity = uvc_entity_by_id(chain->dev, id);
1491         if (entity == NULL) {
1492                 uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1493                         "unknown entity %d.\n", id);
1494                 return -EINVAL;
1495         }
1496
1497         *_entity = entity;
1498         return 0;
1499 }
1500
1501 static int uvc_scan_chain(struct uvc_video_chain *chain,
1502                           struct uvc_entity *term)
1503 {
1504         struct uvc_entity *entity, *prev;
1505
1506         uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:");
1507
1508         entity = term;
1509         prev = NULL;
1510
1511         while (entity != NULL) {
1512                 /* Entity must not be part of an existing chain */
1513                 if (entity->chain.next || entity->chain.prev) {
1514                         uvc_trace(UVC_TRACE_DESCR, "Found reference to "
1515                                 "entity %d already in chain.\n", entity->id);
1516                         return -EINVAL;
1517                 }
1518
1519                 /* Process entity */
1520                 if (uvc_scan_chain_entity(chain, entity) < 0)
1521                         return -EINVAL;
1522
1523                 /* Forward scan */
1524                 if (uvc_scan_chain_forward(chain, entity, prev) < 0)
1525                         return -EINVAL;
1526
1527                 /* Backward scan */
1528                 prev = entity;
1529                 if (uvc_scan_chain_backward(chain, &entity) < 0)
1530                         return -EINVAL;
1531         }
1532
1533         return 0;
1534 }
1535
1536 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir,
1537                 char *buffer)
1538 {
1539         struct uvc_entity *term;
1540         unsigned int nterms = 0;
1541         char *p = buffer;
1542
1543         list_for_each_entry(term, terms, chain) {
1544                 if (!UVC_ENTITY_IS_TERM(term) ||
1545                     UVC_TERM_DIRECTION(term) != dir)
1546                         continue;
1547
1548                 if (nterms)
1549                         p += sprintf(p, ",");
1550                 if (++nterms >= 4) {
1551                         p += sprintf(p, "...");
1552                         break;
1553                 }
1554                 p += sprintf(p, "%u", term->id);
1555         }
1556
1557         return p - buffer;
1558 }
1559
1560 static const char *uvc_print_chain(struct uvc_video_chain *chain)
1561 {
1562         static char buffer[43];
1563         char *p = buffer;
1564
1565         p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p);
1566         p += sprintf(p, " -> ");
1567         uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p);
1568
1569         return buffer;
1570 }
1571
1572 /*
1573  * Scan the device for video chains and register video devices.
1574  *
1575  * Chains are scanned starting at their output terminals and walked backwards.
1576  */
1577 static int uvc_scan_device(struct uvc_device *dev)
1578 {
1579         struct uvc_video_chain *chain;
1580         struct uvc_entity *term;
1581
1582         list_for_each_entry(term, &dev->entities, list) {
1583                 if (!UVC_ENTITY_IS_OTERM(term))
1584                         continue;
1585
1586                 /* If the terminal is already included in a chain, skip it.
1587                  * This can happen for chains that have multiple output
1588                  * terminals, where all output terminals beside the first one
1589                  * will be inserted in the chain in forward scans.
1590                  */
1591                 if (term->chain.next || term->chain.prev)
1592                         continue;
1593
1594                 chain = kzalloc(sizeof(*chain), GFP_KERNEL);
1595                 if (chain == NULL)
1596                         return -ENOMEM;
1597
1598                 INIT_LIST_HEAD(&chain->entities);
1599                 mutex_init(&chain->ctrl_mutex);
1600                 chain->dev = dev;
1601                 v4l2_prio_init(&chain->prio);
1602
1603                 term->flags |= UVC_ENTITY_FLAG_DEFAULT;
1604
1605                 if (uvc_scan_chain(chain, term) < 0) {
1606                         kfree(chain);
1607                         continue;
1608                 }
1609
1610                 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n",
1611                           uvc_print_chain(chain));
1612
1613                 list_add_tail(&chain->list, &dev->chains);
1614         }
1615
1616         if (list_empty(&dev->chains)) {
1617                 uvc_printk(KERN_INFO, "No valid video chain found.\n");
1618                 return -1;
1619         }
1620
1621         return 0;
1622 }
1623
1624 /* ------------------------------------------------------------------------
1625  * Video device registration and unregistration
1626  */
1627
1628 /*
1629  * Delete the UVC device.
1630  *
1631  * Called by the kernel when the last reference to the uvc_device structure
1632  * is released.
1633  *
1634  * As this function is called after or during disconnect(), all URBs have
1635  * already been canceled by the USB core. There is no need to kill the
1636  * interrupt URB manually.
1637  */
1638 static void uvc_delete(struct uvc_device *dev)
1639 {
1640         struct list_head *p, *n;
1641
1642         uvc_status_cleanup(dev);
1643         uvc_ctrl_cleanup_device(dev);
1644
1645         usb_put_intf(dev->intf);
1646         usb_put_dev(dev->udev);
1647
1648         if (dev->vdev.dev)
1649                 v4l2_device_unregister(&dev->vdev);
1650 #ifdef CONFIG_MEDIA_CONTROLLER
1651         if (media_devnode_is_registered(&dev->mdev.devnode))
1652                 media_device_unregister(&dev->mdev);
1653 #endif
1654
1655         list_for_each_safe(p, n, &dev->chains) {
1656                 struct uvc_video_chain *chain;
1657                 chain = list_entry(p, struct uvc_video_chain, list);
1658                 kfree(chain);
1659         }
1660
1661         list_for_each_safe(p, n, &dev->entities) {
1662                 struct uvc_entity *entity;
1663                 entity = list_entry(p, struct uvc_entity, list);
1664 #ifdef CONFIG_MEDIA_CONTROLLER
1665                 uvc_mc_cleanup_entity(entity);
1666 #endif
1667                 if (entity->vdev) {
1668                         video_device_release(entity->vdev);
1669                         entity->vdev = NULL;
1670                 }
1671                 kfree(entity);
1672         }
1673
1674         list_for_each_safe(p, n, &dev->streams) {
1675                 struct uvc_streaming *streaming;
1676                 streaming = list_entry(p, struct uvc_streaming, list);
1677                 usb_driver_release_interface(&uvc_driver.driver,
1678                         streaming->intf);
1679                 usb_put_intf(streaming->intf);
1680                 kfree(streaming->format);
1681                 kfree(streaming->header.bmaControls);
1682                 kfree(streaming);
1683         }
1684
1685         kfree(dev);
1686 }
1687
1688 static void uvc_release(struct video_device *vdev)
1689 {
1690         struct uvc_streaming *stream = video_get_drvdata(vdev);
1691         struct uvc_device *dev = stream->dev;
1692
1693         /* Decrement the registered streams count and delete the device when it
1694          * reaches zero.
1695          */
1696         if (atomic_dec_and_test(&dev->nstreams))
1697                 uvc_delete(dev);
1698 }
1699
1700 /*
1701  * Unregister the video devices.
1702  */
1703 static void uvc_unregister_video(struct uvc_device *dev)
1704 {
1705         struct uvc_streaming *stream;
1706
1707         /* Unregistering all video devices might result in uvc_delete() being
1708          * called from inside the loop if there's no open file handle. To avoid
1709          * that, increment the stream count before iterating over the streams
1710          * and decrement it when done.
1711          */
1712         atomic_inc(&dev->nstreams);
1713
1714         list_for_each_entry(stream, &dev->streams, list) {
1715                 if (stream->vdev == NULL)
1716                         continue;
1717
1718                 video_unregister_device(stream->vdev);
1719                 stream->vdev = NULL;
1720
1721                 uvc_debugfs_cleanup_stream(stream);
1722         }
1723
1724         /* Decrement the stream count and call uvc_delete explicitly if there
1725          * are no stream left.
1726          */
1727         if (atomic_dec_and_test(&dev->nstreams))
1728                 uvc_delete(dev);
1729 }
1730
1731 static int uvc_register_video(struct uvc_device *dev,
1732                 struct uvc_streaming *stream)
1733 {
1734         struct video_device *vdev;
1735         int ret;
1736
1737         /* Initialize the streaming interface with default streaming
1738          * parameters.
1739          */
1740         ret = uvc_video_init(stream);
1741         if (ret < 0) {
1742                 uvc_printk(KERN_ERR, "Failed to initialize the device "
1743                         "(%d).\n", ret);
1744                 return ret;
1745         }
1746
1747         uvc_debugfs_init_stream(stream);
1748
1749         /* Register the device with V4L. */
1750         vdev = video_device_alloc();
1751         if (vdev == NULL) {
1752                 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n",
1753                            ret);
1754                 return -ENOMEM;
1755         }
1756
1757         /* We already hold a reference to dev->udev. The video device will be
1758          * unregistered before the reference is released, so we don't need to
1759          * get another one.
1760          */
1761         vdev->v4l2_dev = &dev->vdev;
1762         vdev->fops = &uvc_fops;
1763         vdev->ioctl_ops = &uvc_ioctl_ops;
1764         vdev->release = uvc_release;
1765         vdev->prio = &stream->chain->prio;
1766         if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
1767                 vdev->vfl_dir = VFL_DIR_TX;
1768         strlcpy(vdev->name, dev->name, sizeof vdev->name);
1769
1770         /* Set the driver data before calling video_register_device, otherwise
1771          * uvc_v4l2_open might race us.
1772          */
1773         stream->vdev = vdev;
1774         video_set_drvdata(vdev, stream);
1775
1776         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1777         if (ret < 0) {
1778                 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n",
1779                            ret);
1780                 stream->vdev = NULL;
1781                 video_device_release(vdev);
1782                 return ret;
1783         }
1784
1785         if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
1786                 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE;
1787         else
1788                 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT;
1789
1790         atomic_inc(&dev->nstreams);
1791         return 0;
1792 }
1793
1794 /*
1795  * Register all video devices in all chains.
1796  */
1797 static int uvc_register_terms(struct uvc_device *dev,
1798         struct uvc_video_chain *chain)
1799 {
1800         struct uvc_streaming *stream;
1801         struct uvc_entity *term;
1802         int ret;
1803
1804         list_for_each_entry(term, &chain->entities, chain) {
1805                 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING)
1806                         continue;
1807
1808                 stream = uvc_stream_by_id(dev, term->id);
1809                 if (stream == NULL) {
1810                         uvc_printk(KERN_INFO, "No streaming interface found "
1811                                    "for terminal %u.", term->id);
1812                         continue;
1813                 }
1814
1815                 stream->chain = chain;
1816                 ret = uvc_register_video(dev, stream);
1817                 if (ret < 0)
1818                         return ret;
1819
1820                 term->vdev = stream->vdev;
1821         }
1822
1823         return 0;
1824 }
1825
1826 static int uvc_register_chains(struct uvc_device *dev)
1827 {
1828         struct uvc_video_chain *chain;
1829         int ret;
1830
1831         list_for_each_entry(chain, &dev->chains, list) {
1832                 ret = uvc_register_terms(dev, chain);
1833                 if (ret < 0)
1834                         return ret;
1835
1836 #ifdef CONFIG_MEDIA_CONTROLLER
1837                 ret = uvc_mc_register_entities(chain);
1838                 if (ret < 0) {
1839                         uvc_printk(KERN_INFO, "Failed to register entites "
1840                                 "(%d).\n", ret);
1841                 }
1842 #endif
1843         }
1844
1845         return 0;
1846 }
1847
1848 /* ------------------------------------------------------------------------
1849  * USB probe, disconnect, suspend and resume
1850  */
1851
1852 static int uvc_probe(struct usb_interface *intf,
1853                      const struct usb_device_id *id)
1854 {
1855         struct usb_device *udev = interface_to_usbdev(intf);
1856         struct uvc_device *dev;
1857         int ret;
1858
1859         if (id->idVendor && id->idProduct)
1860                 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s "
1861                                 "(%04x:%04x)\n", udev->devpath, id->idVendor,
1862                                 id->idProduct);
1863         else
1864                 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n",
1865                                 udev->devpath);
1866
1867         /* Allocate memory for the device and initialize it. */
1868         if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL)
1869                 return -ENOMEM;
1870
1871         INIT_LIST_HEAD(&dev->entities);
1872         INIT_LIST_HEAD(&dev->chains);
1873         INIT_LIST_HEAD(&dev->streams);
1874         atomic_set(&dev->nstreams, 0);
1875         atomic_set(&dev->nmappings, 0);
1876         mutex_init(&dev->lock);
1877
1878         dev->udev = usb_get_dev(udev);
1879         dev->intf = usb_get_intf(intf);
1880         dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber;
1881         dev->quirks = (uvc_quirks_param == -1)
1882                     ? id->driver_info : uvc_quirks_param;
1883
1884         if (udev->product != NULL)
1885                 strlcpy(dev->name, udev->product, sizeof dev->name);
1886         else
1887                 snprintf(dev->name, sizeof dev->name,
1888                         "UVC Camera (%04x:%04x)",
1889                         le16_to_cpu(udev->descriptor.idVendor),
1890                         le16_to_cpu(udev->descriptor.idProduct));
1891
1892         /* Parse the Video Class control descriptor. */
1893         if (uvc_parse_control(dev) < 0) {
1894                 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC "
1895                         "descriptors.\n");
1896                 goto error;
1897         }
1898
1899         uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n",
1900                 dev->uvc_version >> 8, dev->uvc_version & 0xff,
1901                 udev->product ? udev->product : "<unnamed>",
1902                 le16_to_cpu(udev->descriptor.idVendor),
1903                 le16_to_cpu(udev->descriptor.idProduct));
1904
1905         if (dev->quirks != id->driver_info) {
1906                 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module "
1907                         "parameter for testing purpose.\n", dev->quirks);
1908                 uvc_printk(KERN_INFO, "Please report required quirks to the "
1909                         "linux-uvc-devel mailing list.\n");
1910         }
1911
1912         /* Register the media and V4L2 devices. */
1913 #ifdef CONFIG_MEDIA_CONTROLLER
1914         dev->mdev.dev = &intf->dev;
1915         strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model));
1916         if (udev->serial)
1917                 strlcpy(dev->mdev.serial, udev->serial,
1918                         sizeof(dev->mdev.serial));
1919         strcpy(dev->mdev.bus_info, udev->devpath);
1920         dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
1921         dev->mdev.driver_version = LINUX_VERSION_CODE;
1922         if (media_device_register(&dev->mdev) < 0)
1923                 goto error;
1924
1925         dev->vdev.mdev = &dev->mdev;
1926 #endif
1927         if (v4l2_device_register(&intf->dev, &dev->vdev) < 0)
1928                 goto error;
1929
1930         /* Initialize controls. */
1931         if (uvc_ctrl_init_device(dev) < 0)
1932                 goto error;
1933
1934         /* Scan the device for video chains. */
1935         if (uvc_scan_device(dev) < 0)
1936                 goto error;
1937
1938         /* Register video device nodes. */
1939         if (uvc_register_chains(dev) < 0)
1940                 goto error;
1941
1942         /* Save our data pointer in the interface data. */
1943         usb_set_intfdata(intf, dev);
1944
1945         /* Initialize the interrupt URB. */
1946         if ((ret = uvc_status_init(dev)) < 0) {
1947                 uvc_printk(KERN_INFO, "Unable to initialize the status "
1948                         "endpoint (%d), status interrupt will not be "
1949                         "supported.\n", ret);
1950         }
1951
1952         uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n");
1953         usb_enable_autosuspend(udev);
1954         return 0;
1955
1956 error:
1957         uvc_unregister_video(dev);
1958         return -ENODEV;
1959 }
1960
1961 static void uvc_disconnect(struct usb_interface *intf)
1962 {
1963         struct uvc_device *dev = usb_get_intfdata(intf);
1964
1965         /* Set the USB interface data to NULL. This can be done outside the
1966          * lock, as there's no other reader.
1967          */
1968         usb_set_intfdata(intf, NULL);
1969
1970         if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1971             UVC_SC_VIDEOSTREAMING)
1972                 return;
1973
1974         dev->state |= UVC_DEV_DISCONNECTED;
1975
1976         uvc_unregister_video(dev);
1977 }
1978
1979 static int uvc_suspend(struct usb_interface *intf, pm_message_t message)
1980 {
1981         struct uvc_device *dev = usb_get_intfdata(intf);
1982         struct uvc_streaming *stream;
1983
1984         uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n",
1985                 intf->cur_altsetting->desc.bInterfaceNumber);
1986
1987         /* Controls are cached on the fly so they don't need to be saved. */
1988         if (intf->cur_altsetting->desc.bInterfaceSubClass ==
1989             UVC_SC_VIDEOCONTROL) {
1990                 mutex_lock(&dev->lock);
1991                 if (dev->users)
1992                         uvc_status_stop(dev);
1993                 mutex_unlock(&dev->lock);
1994                 return 0;
1995         }
1996
1997         list_for_each_entry(stream, &dev->streams, list) {
1998                 if (stream->intf == intf)
1999                         return uvc_video_suspend(stream);
2000         }
2001
2002         uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface "
2003                         "mismatch.\n");
2004         return -EINVAL;
2005 }
2006
2007 static int __uvc_resume(struct usb_interface *intf, int reset)
2008 {
2009         struct uvc_device *dev = usb_get_intfdata(intf);
2010         struct uvc_streaming *stream;
2011
2012         uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n",
2013                 intf->cur_altsetting->desc.bInterfaceNumber);
2014
2015         if (intf->cur_altsetting->desc.bInterfaceSubClass ==
2016             UVC_SC_VIDEOCONTROL) {
2017                 int ret = 0;
2018
2019                 if (reset) {
2020                         ret = uvc_ctrl_restore_values(dev);
2021                         if (ret < 0)
2022                                 return ret;
2023                 }
2024
2025                 mutex_lock(&dev->lock);
2026                 if (dev->users)
2027                         ret = uvc_status_start(dev, GFP_NOIO);
2028                 mutex_unlock(&dev->lock);
2029
2030                 return ret;
2031         }
2032
2033         list_for_each_entry(stream, &dev->streams, list) {
2034                 if (stream->intf == intf)
2035                         return uvc_video_resume(stream, reset);
2036         }
2037
2038         uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface "
2039                         "mismatch.\n");
2040         return -EINVAL;
2041 }
2042
2043 static int uvc_resume(struct usb_interface *intf)
2044 {
2045         return __uvc_resume(intf, 0);
2046 }
2047
2048 static int uvc_reset_resume(struct usb_interface *intf)
2049 {
2050         return __uvc_resume(intf, 1);
2051 }
2052
2053 /* ------------------------------------------------------------------------
2054  * Module parameters
2055  */
2056
2057 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp)
2058 {
2059         if (uvc_clock_param == CLOCK_MONOTONIC)
2060                 return sprintf(buffer, "CLOCK_MONOTONIC");
2061         else
2062                 return sprintf(buffer, "CLOCK_REALTIME");
2063 }
2064
2065 static int uvc_clock_param_set(const char *val, struct kernel_param *kp)
2066 {
2067         if (strncasecmp(val, "clock_", strlen("clock_")) == 0)
2068                 val += strlen("clock_");
2069
2070         if (strcasecmp(val, "monotonic") == 0)
2071                 uvc_clock_param = CLOCK_MONOTONIC;
2072         else if (strcasecmp(val, "realtime") == 0)
2073                 uvc_clock_param = CLOCK_REALTIME;
2074         else
2075                 return -EINVAL;
2076
2077         return 0;
2078 }
2079
2080 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get,
2081                   &uvc_clock_param, S_IRUGO|S_IWUSR);
2082 MODULE_PARM_DESC(clock, "Video buffers timestamp clock");
2083 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR);
2084 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames");
2085 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR);
2086 MODULE_PARM_DESC(quirks, "Forced device quirks");
2087 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR);
2088 MODULE_PARM_DESC(trace, "Trace level bitmask");
2089 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR);
2090 MODULE_PARM_DESC(timeout, "Streaming control requests timeout");
2091
2092 /* ------------------------------------------------------------------------
2093  * Driver initialization and cleanup
2094  */
2095
2096 /*
2097  * The Logitech cameras listed below have their interface class set to
2098  * VENDOR_SPEC because they don't announce themselves as UVC devices, even
2099  * though they are compliant.
2100  */
2101 static struct usb_device_id uvc_ids[] = {
2102         /* LogiLink Wireless Webcam */
2103         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2104                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2105           .idVendor             = 0x0416,
2106           .idProduct            = 0xa91a,
2107           .bInterfaceClass      = USB_CLASS_VIDEO,
2108           .bInterfaceSubClass   = 1,
2109           .bInterfaceProtocol   = 0,
2110           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2111         /* Genius eFace 2025 */
2112         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2113                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2114           .idVendor             = 0x0458,
2115           .idProduct            = 0x706e,
2116           .bInterfaceClass      = USB_CLASS_VIDEO,
2117           .bInterfaceSubClass   = 1,
2118           .bInterfaceProtocol   = 0,
2119           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2120         /* Microsoft Lifecam NX-6000 */
2121         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2122                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2123           .idVendor             = 0x045e,
2124           .idProduct            = 0x00f8,
2125           .bInterfaceClass      = USB_CLASS_VIDEO,
2126           .bInterfaceSubClass   = 1,
2127           .bInterfaceProtocol   = 0,
2128           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2129         /* Microsoft Lifecam NX-3000 */
2130         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2131                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2132           .idVendor             = 0x045e,
2133           .idProduct            = 0x0721,
2134           .bInterfaceClass      = USB_CLASS_VIDEO,
2135           .bInterfaceSubClass   = 1,
2136           .bInterfaceProtocol   = 0,
2137           .driver_info          = UVC_QUIRK_PROBE_DEF },
2138         /* Microsoft Lifecam VX-7000 */
2139         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2140                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2141           .idVendor             = 0x045e,
2142           .idProduct            = 0x0723,
2143           .bInterfaceClass      = USB_CLASS_VIDEO,
2144           .bInterfaceSubClass   = 1,
2145           .bInterfaceProtocol   = 0,
2146           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2147         /* Logitech Quickcam Fusion */
2148         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2149                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2150           .idVendor             = 0x046d,
2151           .idProduct            = 0x08c1,
2152           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2153           .bInterfaceSubClass   = 1,
2154           .bInterfaceProtocol   = 0 },
2155         /* Logitech Quickcam Orbit MP */
2156         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2157                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2158           .idVendor             = 0x046d,
2159           .idProduct            = 0x08c2,
2160           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2161           .bInterfaceSubClass   = 1,
2162           .bInterfaceProtocol   = 0 },
2163         /* Logitech Quickcam Pro for Notebook */
2164         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2165                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2166           .idVendor             = 0x046d,
2167           .idProduct            = 0x08c3,
2168           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2169           .bInterfaceSubClass   = 1,
2170           .bInterfaceProtocol   = 0 },
2171         /* Logitech Quickcam Pro 5000 */
2172         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2173                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2174           .idVendor             = 0x046d,
2175           .idProduct            = 0x08c5,
2176           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2177           .bInterfaceSubClass   = 1,
2178           .bInterfaceProtocol   = 0 },
2179         /* Logitech Quickcam OEM Dell Notebook */
2180         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2181                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2182           .idVendor             = 0x046d,
2183           .idProduct            = 0x08c6,
2184           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2185           .bInterfaceSubClass   = 1,
2186           .bInterfaceProtocol   = 0 },
2187         /* Logitech Quickcam OEM Cisco VT Camera II */
2188         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2189                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2190           .idVendor             = 0x046d,
2191           .idProduct            = 0x08c7,
2192           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2193           .bInterfaceSubClass   = 1,
2194           .bInterfaceProtocol   = 0 },
2195         /* Logitech HD Pro Webcam C920 */
2196         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2197                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2198           .idVendor             = 0x046d,
2199           .idProduct            = 0x082d,
2200           .bInterfaceClass      = USB_CLASS_VIDEO,
2201           .bInterfaceSubClass   = 1,
2202           .bInterfaceProtocol   = 0,
2203           .driver_info          = UVC_QUIRK_RESTORE_CTRLS_ON_INIT },
2204         /* Chicony CNF7129 (Asus EEE 100HE) */
2205         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2206                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2207           .idVendor             = 0x04f2,
2208           .idProduct            = 0xb071,
2209           .bInterfaceClass      = USB_CLASS_VIDEO,
2210           .bInterfaceSubClass   = 1,
2211           .bInterfaceProtocol   = 0,
2212           .driver_info          = UVC_QUIRK_RESTRICT_FRAME_RATE },
2213         /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */
2214         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2215                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2216           .idVendor             = 0x058f,
2217           .idProduct            = 0x3820,
2218           .bInterfaceClass      = USB_CLASS_VIDEO,
2219           .bInterfaceSubClass   = 1,
2220           .bInterfaceProtocol   = 0,
2221           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2222         /* Dell XPS m1530 */
2223         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2224                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2225           .idVendor             = 0x05a9,
2226           .idProduct            = 0x2640,
2227           .bInterfaceClass      = USB_CLASS_VIDEO,
2228           .bInterfaceSubClass   = 1,
2229           .bInterfaceProtocol   = 0,
2230           .driver_info          = UVC_QUIRK_PROBE_DEF },
2231         /* Dell SP2008WFP Monitor */
2232         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2233                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2234           .idVendor             = 0x05a9,
2235           .idProduct            = 0x2641,
2236           .bInterfaceClass      = USB_CLASS_VIDEO,
2237           .bInterfaceSubClass   = 1,
2238           .bInterfaceProtocol   = 0,
2239           .driver_info          = UVC_QUIRK_PROBE_DEF },
2240         /* Dell Alienware X51 */
2241         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2242                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2243           .idVendor             = 0x05a9,
2244           .idProduct            = 0x2643,
2245           .bInterfaceClass      = USB_CLASS_VIDEO,
2246           .bInterfaceSubClass   = 1,
2247           .bInterfaceProtocol   = 0,
2248           .driver_info  = UVC_QUIRK_PROBE_DEF },
2249         /* Dell Studio Hybrid 140g (OmniVision webcam) */
2250         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2251                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2252           .idVendor             = 0x05a9,
2253           .idProduct            = 0x264a,
2254           .bInterfaceClass      = USB_CLASS_VIDEO,
2255           .bInterfaceSubClass   = 1,
2256           .bInterfaceProtocol   = 0,
2257           .driver_info          = UVC_QUIRK_PROBE_DEF },
2258         /* Dell XPS M1330 (OmniVision OV7670 webcam) */
2259         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2260                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2261           .idVendor             = 0x05a9,
2262           .idProduct            = 0x7670,
2263           .bInterfaceClass      = USB_CLASS_VIDEO,
2264           .bInterfaceSubClass   = 1,
2265           .bInterfaceProtocol   = 0,
2266           .driver_info          = UVC_QUIRK_PROBE_DEF },
2267         /* Apple Built-In iSight */
2268         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2269                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2270           .idVendor             = 0x05ac,
2271           .idProduct            = 0x8501,
2272           .bInterfaceClass      = USB_CLASS_VIDEO,
2273           .bInterfaceSubClass   = 1,
2274           .bInterfaceProtocol   = 0,
2275           .driver_info          = UVC_QUIRK_PROBE_MINMAX
2276                                 | UVC_QUIRK_BUILTIN_ISIGHT },
2277         /* Foxlink ("HP Webcam" on HP Mini 5103) */
2278         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2279                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2280           .idVendor             = 0x05c8,
2281           .idProduct            = 0x0403,
2282           .bInterfaceClass      = USB_CLASS_VIDEO,
2283           .bInterfaceSubClass   = 1,
2284           .bInterfaceProtocol   = 0,
2285           .driver_info          = UVC_QUIRK_FIX_BANDWIDTH },
2286         /* Genesys Logic USB 2.0 PC Camera */
2287         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2288                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2289           .idVendor             = 0x05e3,
2290           .idProduct            = 0x0505,
2291           .bInterfaceClass      = USB_CLASS_VIDEO,
2292           .bInterfaceSubClass   = 1,
2293           .bInterfaceProtocol   = 0,
2294           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2295         /* Hercules Classic Silver */
2296         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2297                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2298           .idVendor             = 0x06f8,
2299           .idProduct            = 0x300c,
2300           .bInterfaceClass      = USB_CLASS_VIDEO,
2301           .bInterfaceSubClass   = 1,
2302           .bInterfaceProtocol   = 0,
2303           .driver_info          = UVC_QUIRK_FIX_BANDWIDTH },
2304         /* ViMicro Vega */
2305         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2306                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2307           .idVendor             = 0x0ac8,
2308           .idProduct            = 0x332d,
2309           .bInterfaceClass      = USB_CLASS_VIDEO,
2310           .bInterfaceSubClass   = 1,
2311           .bInterfaceProtocol   = 0,
2312           .driver_info          = UVC_QUIRK_FIX_BANDWIDTH },
2313         /* ViMicro - Minoru3D */
2314         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2315                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2316           .idVendor             = 0x0ac8,
2317           .idProduct            = 0x3410,
2318           .bInterfaceClass      = USB_CLASS_VIDEO,
2319           .bInterfaceSubClass   = 1,
2320           .bInterfaceProtocol   = 0,
2321           .driver_info          = UVC_QUIRK_FIX_BANDWIDTH },
2322         /* ViMicro Venus - Minoru3D */
2323         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2324                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2325           .idVendor             = 0x0ac8,
2326           .idProduct            = 0x3420,
2327           .bInterfaceClass      = USB_CLASS_VIDEO,
2328           .bInterfaceSubClass   = 1,
2329           .bInterfaceProtocol   = 0,
2330           .driver_info          = UVC_QUIRK_FIX_BANDWIDTH },
2331         /* Ophir Optronics - SPCAM 620U */
2332         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2333                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2334           .idVendor             = 0x0bd3,
2335           .idProduct            = 0x0555,
2336           .bInterfaceClass      = USB_CLASS_VIDEO,
2337           .bInterfaceSubClass   = 1,
2338           .bInterfaceProtocol   = 0,
2339           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2340         /* MT6227 */
2341         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2342                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2343           .idVendor             = 0x0e8d,
2344           .idProduct            = 0x0004,
2345           .bInterfaceClass      = USB_CLASS_VIDEO,
2346           .bInterfaceSubClass   = 1,
2347           .bInterfaceProtocol   = 0,
2348           .driver_info          = UVC_QUIRK_PROBE_MINMAX
2349                                 | UVC_QUIRK_PROBE_DEF },
2350         /* IMC Networks (Medion Akoya) */
2351         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2352                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2353           .idVendor             = 0x13d3,
2354           .idProduct            = 0x5103,
2355           .bInterfaceClass      = USB_CLASS_VIDEO,
2356           .bInterfaceSubClass   = 1,
2357           .bInterfaceProtocol   = 0,
2358           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2359         /* JMicron USB2.0 XGA WebCam */
2360         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2361                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2362           .idVendor             = 0x152d,
2363           .idProduct            = 0x0310,
2364           .bInterfaceClass      = USB_CLASS_VIDEO,
2365           .bInterfaceSubClass   = 1,
2366           .bInterfaceProtocol   = 0,
2367           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2368         /* Syntek (HP Spartan) */
2369         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2370                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2371           .idVendor             = 0x174f,
2372           .idProduct            = 0x5212,
2373           .bInterfaceClass      = USB_CLASS_VIDEO,
2374           .bInterfaceSubClass   = 1,
2375           .bInterfaceProtocol   = 0,
2376           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2377         /* Syntek (Samsung Q310) */
2378         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2379                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2380           .idVendor             = 0x174f,
2381           .idProduct            = 0x5931,
2382           .bInterfaceClass      = USB_CLASS_VIDEO,
2383           .bInterfaceSubClass   = 1,
2384           .bInterfaceProtocol   = 0,
2385           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2386         /* Syntek (Packard Bell EasyNote MX52 */
2387         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2388                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2389           .idVendor             = 0x174f,
2390           .idProduct            = 0x8a12,
2391           .bInterfaceClass      = USB_CLASS_VIDEO,
2392           .bInterfaceSubClass   = 1,
2393           .bInterfaceProtocol   = 0,
2394           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2395         /* Syntek (Asus F9SG) */
2396         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2397                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2398           .idVendor             = 0x174f,
2399           .idProduct            = 0x8a31,
2400           .bInterfaceClass      = USB_CLASS_VIDEO,
2401           .bInterfaceSubClass   = 1,
2402           .bInterfaceProtocol   = 0,
2403           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2404         /* Syntek (Asus U3S) */
2405         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2406                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2407           .idVendor             = 0x174f,
2408           .idProduct            = 0x8a33,
2409           .bInterfaceClass      = USB_CLASS_VIDEO,
2410           .bInterfaceSubClass   = 1,
2411           .bInterfaceProtocol   = 0,
2412           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2413         /* Syntek (JAOtech Smart Terminal) */
2414         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2415                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2416           .idVendor             = 0x174f,
2417           .idProduct            = 0x8a34,
2418           .bInterfaceClass      = USB_CLASS_VIDEO,
2419           .bInterfaceSubClass   = 1,
2420           .bInterfaceProtocol   = 0,
2421           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2422         /* Miricle 307K */
2423         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2424                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2425           .idVendor             = 0x17dc,
2426           .idProduct            = 0x0202,
2427           .bInterfaceClass      = USB_CLASS_VIDEO,
2428           .bInterfaceSubClass   = 1,
2429           .bInterfaceProtocol   = 0,
2430           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2431         /* Lenovo Thinkpad SL400/SL500 */
2432         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2433                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2434           .idVendor             = 0x17ef,
2435           .idProduct            = 0x480b,
2436           .bInterfaceClass      = USB_CLASS_VIDEO,
2437           .bInterfaceSubClass   = 1,
2438           .bInterfaceProtocol   = 0,
2439           .driver_info          = UVC_QUIRK_STREAM_NO_FID },
2440         /* Aveo Technology USB 2.0 Camera */
2441         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2442                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2443           .idVendor             = 0x1871,
2444           .idProduct            = 0x0306,
2445           .bInterfaceClass      = USB_CLASS_VIDEO,
2446           .bInterfaceSubClass   = 1,
2447           .bInterfaceProtocol   = 0,
2448           .driver_info          = UVC_QUIRK_PROBE_MINMAX
2449                                 | UVC_QUIRK_PROBE_EXTRAFIELDS },
2450         /* Ecamm Pico iMage */
2451         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2452                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2453           .idVendor             = 0x18cd,
2454           .idProduct            = 0xcafe,
2455           .bInterfaceClass      = USB_CLASS_VIDEO,
2456           .bInterfaceSubClass   = 1,
2457           .bInterfaceProtocol   = 0,
2458           .driver_info          = UVC_QUIRK_PROBE_EXTRAFIELDS },
2459         /* Manta MM-353 Plako */
2460         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2461                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2462           .idVendor             = 0x18ec,
2463           .idProduct            = 0x3188,
2464           .bInterfaceClass      = USB_CLASS_VIDEO,
2465           .bInterfaceSubClass   = 1,
2466           .bInterfaceProtocol   = 0,
2467           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2468         /* FSC WebCam V30S */
2469         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2470                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2471           .idVendor             = 0x18ec,
2472           .idProduct            = 0x3288,
2473           .bInterfaceClass      = USB_CLASS_VIDEO,
2474           .bInterfaceSubClass   = 1,
2475           .bInterfaceProtocol   = 0,
2476           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2477         /* Arkmicro unbranded */
2478         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2479                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2480           .idVendor             = 0x18ec,
2481           .idProduct            = 0x3290,
2482           .bInterfaceClass      = USB_CLASS_VIDEO,
2483           .bInterfaceSubClass   = 1,
2484           .bInterfaceProtocol   = 0,
2485           .driver_info          = UVC_QUIRK_PROBE_DEF },
2486         /* The Imaging Source USB CCD cameras */
2487         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2488                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2489           .idVendor             = 0x199e,
2490           .idProduct            = 0x8102,
2491           .bInterfaceClass      = USB_CLASS_VENDOR_SPEC,
2492           .bInterfaceSubClass   = 1,
2493           .bInterfaceProtocol   = 0 },
2494         /* Bodelin ProScopeHR */
2495         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2496                                 | USB_DEVICE_ID_MATCH_DEV_HI
2497                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2498           .idVendor             = 0x19ab,
2499           .idProduct            = 0x1000,
2500           .bcdDevice_hi         = 0x0126,
2501           .bInterfaceClass      = USB_CLASS_VIDEO,
2502           .bInterfaceSubClass   = 1,
2503           .bInterfaceProtocol   = 0,
2504           .driver_info          = UVC_QUIRK_STATUS_INTERVAL },
2505         /* MSI StarCam 370i */
2506         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2507                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2508           .idVendor             = 0x1b3b,
2509           .idProduct            = 0x2951,
2510           .bInterfaceClass      = USB_CLASS_VIDEO,
2511           .bInterfaceSubClass   = 1,
2512           .bInterfaceProtocol   = 0,
2513           .driver_info          = UVC_QUIRK_PROBE_MINMAX },
2514         /* SiGma Micro USB Web Camera */
2515         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2516                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2517           .idVendor             = 0x1c4f,
2518           .idProduct            = 0x3000,
2519           .bInterfaceClass      = USB_CLASS_VIDEO,
2520           .bInterfaceSubClass   = 1,
2521           .bInterfaceProtocol   = 0,
2522           .driver_info          = UVC_QUIRK_PROBE_MINMAX
2523                                 | UVC_QUIRK_IGNORE_SELECTOR_UNIT },
2524         /* Oculus VR Positional Tracker DK2 */
2525         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE
2526                                 | USB_DEVICE_ID_MATCH_INT_INFO,
2527           .idVendor             = 0x2833,
2528           .idProduct            = 0x0201,
2529           .bInterfaceClass      = USB_CLASS_VIDEO,
2530           .bInterfaceSubClass   = 1,
2531           .bInterfaceProtocol   = 0,
2532           .driver_info          = UVC_QUIRK_FORCE_Y8 },
2533         /* Generic USB Video Class */
2534         { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) },
2535         {}
2536 };
2537
2538 MODULE_DEVICE_TABLE(usb, uvc_ids);
2539
2540 struct uvc_driver uvc_driver = {
2541         .driver = {
2542                 .name           = "uvcvideo",
2543                 .probe          = uvc_probe,
2544                 .disconnect     = uvc_disconnect,
2545                 .suspend        = uvc_suspend,
2546                 .resume         = uvc_resume,
2547                 .reset_resume   = uvc_reset_resume,
2548                 .id_table       = uvc_ids,
2549                 .supports_autosuspend = 1,
2550         },
2551 };
2552
2553 static int __init uvc_init(void)
2554 {
2555         int ret;
2556
2557         uvc_debugfs_init();
2558
2559         ret = usb_register(&uvc_driver.driver);
2560         if (ret < 0) {
2561                 uvc_debugfs_cleanup();
2562                 return ret;
2563         }
2564
2565         printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n");
2566         return 0;
2567 }
2568
2569 static void __exit uvc_cleanup(void)
2570 {
2571         usb_deregister(&uvc_driver.driver);
2572         uvc_debugfs_cleanup();
2573 }
2574
2575 module_init(uvc_init);
2576 module_exit(uvc_cleanup);
2577
2578 MODULE_AUTHOR(DRIVER_AUTHOR);
2579 MODULE_DESCRIPTION(DRIVER_DESC);
2580 MODULE_LICENSE("GPL");
2581 MODULE_VERSION(DRIVER_VERSION);
2582