uvc_driver.c revision e01a234407af60c4b9854d069a7217d75fcdfa29
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/* 15 * This driver aims to support video input and ouput devices compliant with the 16 * 'USB Video Class' specification. 17 * 18 * The driver doesn't support the deprecated v4l1 interface. It implements the 19 * mmap capture method only, and doesn't do any image format conversion in 20 * software. If your user-space application doesn't support YUYV or MJPEG, fix 21 * it :-). Please note that the MJPEG data have been stripped from their 22 * Huffman tables (DHT marker), you will need to add it back if your JPEG 23 * codec can't handle MJPEG data. 24 */ 25 26#include <linux/kernel.h> 27#include <linux/list.h> 28#include <linux/module.h> 29#include <linux/slab.h> 30#include <linux/usb.h> 31#include <linux/videodev2.h> 32#include <linux/vmalloc.h> 33#include <linux/wait.h> 34#include <asm/atomic.h> 35#include <asm/unaligned.h> 36 37#include <media/v4l2-common.h> 38 39#include "uvcvideo.h" 40 41#define DRIVER_AUTHOR "Laurent Pinchart " \ 42 "<laurent.pinchart@ideasonboard.com>" 43#define DRIVER_DESC "USB Video Class driver" 44 45unsigned int uvc_clock_param = CLOCK_MONOTONIC; 46unsigned int uvc_no_drop_param; 47static unsigned int uvc_quirks_param = -1; 48unsigned int uvc_trace_param; 49unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 50 51/* ------------------------------------------------------------------------ 52 * Video formats 53 */ 54 55static struct uvc_format_desc uvc_fmts[] = { 56 { 57 .name = "YUV 4:2:2 (YUYV)", 58 .guid = UVC_GUID_FORMAT_YUY2, 59 .fcc = V4L2_PIX_FMT_YUYV, 60 }, 61 { 62 .name = "YUV 4:2:2 (YUYV)", 63 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 64 .fcc = V4L2_PIX_FMT_YUYV, 65 }, 66 { 67 .name = "YUV 4:2:0 (NV12)", 68 .guid = UVC_GUID_FORMAT_NV12, 69 .fcc = V4L2_PIX_FMT_NV12, 70 }, 71 { 72 .name = "MJPEG", 73 .guid = UVC_GUID_FORMAT_MJPEG, 74 .fcc = V4L2_PIX_FMT_MJPEG, 75 }, 76 { 77 .name = "YVU 4:2:0 (YV12)", 78 .guid = UVC_GUID_FORMAT_YV12, 79 .fcc = V4L2_PIX_FMT_YVU420, 80 }, 81 { 82 .name = "YUV 4:2:0 (I420)", 83 .guid = UVC_GUID_FORMAT_I420, 84 .fcc = V4L2_PIX_FMT_YUV420, 85 }, 86 { 87 .name = "YUV 4:2:2 (UYVY)", 88 .guid = UVC_GUID_FORMAT_UYVY, 89 .fcc = V4L2_PIX_FMT_UYVY, 90 }, 91 { 92 .name = "Greyscale (8-bit)", 93 .guid = UVC_GUID_FORMAT_Y800, 94 .fcc = V4L2_PIX_FMT_GREY, 95 }, 96 { 97 .name = "Greyscale (16-bit)", 98 .guid = UVC_GUID_FORMAT_Y16, 99 .fcc = V4L2_PIX_FMT_Y16, 100 }, 101 { 102 .name = "RGB Bayer", 103 .guid = UVC_GUID_FORMAT_BY8, 104 .fcc = V4L2_PIX_FMT_SBGGR8, 105 }, 106 { 107 .name = "RGB565", 108 .guid = UVC_GUID_FORMAT_RGBP, 109 .fcc = V4L2_PIX_FMT_RGB565, 110 }, 111}; 112 113/* ------------------------------------------------------------------------ 114 * Utility functions 115 */ 116 117struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 118 __u8 epaddr) 119{ 120 struct usb_host_endpoint *ep; 121 unsigned int i; 122 123 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 124 ep = &alts->endpoint[i]; 125 if (ep->desc.bEndpointAddress == epaddr) 126 return ep; 127 } 128 129 return NULL; 130} 131 132static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16]) 133{ 134 unsigned int len = ARRAY_SIZE(uvc_fmts); 135 unsigned int i; 136 137 for (i = 0; i < len; ++i) { 138 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) 139 return &uvc_fmts[i]; 140 } 141 142 return NULL; 143} 144 145static __u32 uvc_colorspace(const __u8 primaries) 146{ 147 static const __u8 colorprimaries[] = { 148 0, 149 V4L2_COLORSPACE_SRGB, 150 V4L2_COLORSPACE_470_SYSTEM_M, 151 V4L2_COLORSPACE_470_SYSTEM_BG, 152 V4L2_COLORSPACE_SMPTE170M, 153 V4L2_COLORSPACE_SMPTE240M, 154 }; 155 156 if (primaries < ARRAY_SIZE(colorprimaries)) 157 return colorprimaries[primaries]; 158 159 return 0; 160} 161 162/* Simplify a fraction using a simple continued fraction decomposition. The 163 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 164 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 165 * arbitrary parameters to remove non-significative terms from the simple 166 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 167 * respectively seems to give nice results. 168 */ 169void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, 170 unsigned int n_terms, unsigned int threshold) 171{ 172 uint32_t *an; 173 uint32_t x, y, r; 174 unsigned int i, n; 175 176 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL); 177 if (an == NULL) 178 return; 179 180 /* Convert the fraction to a simple continued fraction. See 181 * http://mathforum.org/dr.math/faq/faq.fractions.html 182 * Stop if the current term is bigger than or equal to the given 183 * threshold. 184 */ 185 x = *numerator; 186 y = *denominator; 187 188 for (n = 0; n < n_terms && y != 0; ++n) { 189 an[n] = x / y; 190 if (an[n] >= threshold) { 191 if (n < 2) 192 n++; 193 break; 194 } 195 196 r = x - an[n] * y; 197 x = y; 198 y = r; 199 } 200 201 /* Expand the simple continued fraction back to an integer fraction. */ 202 x = 0; 203 y = 1; 204 205 for (i = n; i > 0; --i) { 206 r = y; 207 y = an[i-1] * y + x; 208 x = r; 209 } 210 211 *numerator = y; 212 *denominator = x; 213 kfree(an); 214} 215 216/* Convert a fraction to a frame interval in 100ns multiples. The idea here is 217 * to compute numerator / denominator * 10000000 using 32 bit fixed point 218 * arithmetic only. 219 */ 220uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator) 221{ 222 uint32_t multiplier; 223 224 /* Saturate the result if the operation would overflow. */ 225 if (denominator == 0 || 226 numerator/denominator >= ((uint32_t)-1)/10000000) 227 return (uint32_t)-1; 228 229 /* Divide both the denominator and the multiplier by two until 230 * numerator * multiplier doesn't overflow. If anyone knows a better 231 * algorithm please let me know. 232 */ 233 multiplier = 10000000; 234 while (numerator > ((uint32_t)-1)/multiplier) { 235 multiplier /= 2; 236 denominator /= 2; 237 } 238 239 return denominator ? numerator * multiplier / denominator : 0; 240} 241 242/* ------------------------------------------------------------------------ 243 * Terminal and unit management 244 */ 245 246static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 247{ 248 struct uvc_entity *entity; 249 250 list_for_each_entry(entity, &dev->entities, list) { 251 if (entity->id == id) 252 return entity; 253 } 254 255 return NULL; 256} 257 258static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 259 int id, struct uvc_entity *entity) 260{ 261 unsigned int i; 262 263 if (entity == NULL) 264 entity = list_entry(&dev->entities, struct uvc_entity, list); 265 266 list_for_each_entry_continue(entity, &dev->entities, list) { 267 for (i = 0; i < entity->bNrInPins; ++i) 268 if (entity->baSourceID[i] == id) 269 return entity; 270 } 271 272 return NULL; 273} 274 275static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 276{ 277 struct uvc_streaming *stream; 278 279 list_for_each_entry(stream, &dev->streams, list) { 280 if (stream->header.bTerminalLink == id) 281 return stream; 282 } 283 284 return NULL; 285} 286 287/* ------------------------------------------------------------------------ 288 * Descriptors parsing 289 */ 290 291static int uvc_parse_format(struct uvc_device *dev, 292 struct uvc_streaming *streaming, struct uvc_format *format, 293 __u32 **intervals, unsigned char *buffer, int buflen) 294{ 295 struct usb_interface *intf = streaming->intf; 296 struct usb_host_interface *alts = intf->cur_altsetting; 297 struct uvc_format_desc *fmtdesc; 298 struct uvc_frame *frame; 299 const unsigned char *start = buffer; 300 unsigned int interval; 301 unsigned int i, n; 302 __u8 ftype; 303 304 format->type = buffer[2]; 305 format->index = buffer[3]; 306 307 switch (buffer[2]) { 308 case UVC_VS_FORMAT_UNCOMPRESSED: 309 case UVC_VS_FORMAT_FRAME_BASED: 310 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 311 if (buflen < n) { 312 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 313 "interface %d FORMAT error\n", 314 dev->udev->devnum, 315 alts->desc.bInterfaceNumber); 316 return -EINVAL; 317 } 318 319 /* Find the format descriptor from its GUID. */ 320 fmtdesc = uvc_format_by_guid(&buffer[5]); 321 322 if (fmtdesc != NULL) { 323 strlcpy(format->name, fmtdesc->name, 324 sizeof format->name); 325 format->fcc = fmtdesc->fcc; 326 } else { 327 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 328 &buffer[5]); 329 snprintf(format->name, sizeof(format->name), "%pUl\n", 330 &buffer[5]); 331 format->fcc = 0; 332 } 333 334 format->bpp = buffer[21]; 335 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 336 ftype = UVC_VS_FRAME_UNCOMPRESSED; 337 } else { 338 ftype = UVC_VS_FRAME_FRAME_BASED; 339 if (buffer[27]) 340 format->flags = UVC_FMT_FLAG_COMPRESSED; 341 } 342 break; 343 344 case UVC_VS_FORMAT_MJPEG: 345 if (buflen < 11) { 346 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 347 "interface %d FORMAT error\n", 348 dev->udev->devnum, 349 alts->desc.bInterfaceNumber); 350 return -EINVAL; 351 } 352 353 strlcpy(format->name, "MJPEG", sizeof format->name); 354 format->fcc = V4L2_PIX_FMT_MJPEG; 355 format->flags = UVC_FMT_FLAG_COMPRESSED; 356 format->bpp = 0; 357 ftype = UVC_VS_FRAME_MJPEG; 358 break; 359 360 case UVC_VS_FORMAT_DV: 361 if (buflen < 9) { 362 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 363 "interface %d FORMAT error\n", 364 dev->udev->devnum, 365 alts->desc.bInterfaceNumber); 366 return -EINVAL; 367 } 368 369 switch (buffer[8] & 0x7f) { 370 case 0: 371 strlcpy(format->name, "SD-DV", sizeof format->name); 372 break; 373 case 1: 374 strlcpy(format->name, "SDL-DV", sizeof format->name); 375 break; 376 case 2: 377 strlcpy(format->name, "HD-DV", sizeof format->name); 378 break; 379 default: 380 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 381 "interface %d: unknown DV format %u\n", 382 dev->udev->devnum, 383 alts->desc.bInterfaceNumber, buffer[8]); 384 return -EINVAL; 385 } 386 387 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 388 sizeof format->name); 389 390 format->fcc = V4L2_PIX_FMT_DV; 391 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 392 format->bpp = 0; 393 ftype = 0; 394 395 /* Create a dummy frame descriptor. */ 396 frame = &format->frame[0]; 397 memset(&format->frame[0], 0, sizeof format->frame[0]); 398 frame->bFrameIntervalType = 1; 399 frame->dwDefaultFrameInterval = 1; 400 frame->dwFrameInterval = *intervals; 401 *(*intervals)++ = 1; 402 format->nframes = 1; 403 break; 404 405 case UVC_VS_FORMAT_MPEG2TS: 406 case UVC_VS_FORMAT_STREAM_BASED: 407 /* Not supported yet. */ 408 default: 409 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 410 "interface %d unsupported format %u\n", 411 dev->udev->devnum, alts->desc.bInterfaceNumber, 412 buffer[2]); 413 return -EINVAL; 414 } 415 416 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 417 418 buflen -= buffer[0]; 419 buffer += buffer[0]; 420 421 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 422 * based formats have frame descriptors. 423 */ 424 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 425 buffer[2] == ftype) { 426 frame = &format->frame[format->nframes]; 427 if (ftype != UVC_VS_FRAME_FRAME_BASED) 428 n = buflen > 25 ? buffer[25] : 0; 429 else 430 n = buflen > 21 ? buffer[21] : 0; 431 432 n = n ? n : 3; 433 434 if (buflen < 26 + 4*n) { 435 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 436 "interface %d FRAME error\n", dev->udev->devnum, 437 alts->desc.bInterfaceNumber); 438 return -EINVAL; 439 } 440 441 frame->bFrameIndex = buffer[3]; 442 frame->bmCapabilities = buffer[4]; 443 frame->wWidth = get_unaligned_le16(&buffer[5]); 444 frame->wHeight = get_unaligned_le16(&buffer[7]); 445 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 446 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 447 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 448 frame->dwMaxVideoFrameBufferSize = 449 get_unaligned_le32(&buffer[17]); 450 frame->dwDefaultFrameInterval = 451 get_unaligned_le32(&buffer[21]); 452 frame->bFrameIntervalType = buffer[25]; 453 } else { 454 frame->dwMaxVideoFrameBufferSize = 0; 455 frame->dwDefaultFrameInterval = 456 get_unaligned_le32(&buffer[17]); 457 frame->bFrameIntervalType = buffer[21]; 458 } 459 frame->dwFrameInterval = *intervals; 460 461 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 462 * completely. Observed behaviours range from setting the 463 * value to 1.1x the actual frame size to hardwiring the 464 * 16 low bits to 0. This results in a higher than necessary 465 * memory usage as well as a wrong image size information. For 466 * uncompressed formats this can be fixed by computing the 467 * value from the frame size. 468 */ 469 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 470 frame->dwMaxVideoFrameBufferSize = format->bpp 471 * frame->wWidth * frame->wHeight / 8; 472 473 /* Some bogus devices report dwMinFrameInterval equal to 474 * dwMaxFrameInterval and have dwFrameIntervalStep set to 475 * zero. Setting all null intervals to 1 fixes the problem and 476 * some other divisions by zero that could happen. 477 */ 478 for (i = 0; i < n; ++i) { 479 interval = get_unaligned_le32(&buffer[26+4*i]); 480 *(*intervals)++ = interval ? interval : 1; 481 } 482 483 /* Make sure that the default frame interval stays between 484 * the boundaries. 485 */ 486 n -= frame->bFrameIntervalType ? 1 : 2; 487 frame->dwDefaultFrameInterval = 488 min(frame->dwFrameInterval[n], 489 max(frame->dwFrameInterval[0], 490 frame->dwDefaultFrameInterval)); 491 492 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 493 frame->bFrameIntervalType = 1; 494 frame->dwFrameInterval[0] = 495 frame->dwDefaultFrameInterval; 496 } 497 498 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 499 frame->wWidth, frame->wHeight, 500 10000000/frame->dwDefaultFrameInterval, 501 (100000000/frame->dwDefaultFrameInterval)%10); 502 503 format->nframes++; 504 buflen -= buffer[0]; 505 buffer += buffer[0]; 506 } 507 508 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 509 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 510 buflen -= buffer[0]; 511 buffer += buffer[0]; 512 } 513 514 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 515 buffer[2] == UVC_VS_COLORFORMAT) { 516 if (buflen < 6) { 517 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 518 "interface %d COLORFORMAT error\n", 519 dev->udev->devnum, 520 alts->desc.bInterfaceNumber); 521 return -EINVAL; 522 } 523 524 format->colorspace = uvc_colorspace(buffer[3]); 525 526 buflen -= buffer[0]; 527 buffer += buffer[0]; 528 } 529 530 return buffer - start; 531} 532 533static int uvc_parse_streaming(struct uvc_device *dev, 534 struct usb_interface *intf) 535{ 536 struct uvc_streaming *streaming = NULL; 537 struct uvc_format *format; 538 struct uvc_frame *frame; 539 struct usb_host_interface *alts = &intf->altsetting[0]; 540 unsigned char *_buffer, *buffer = alts->extra; 541 int _buflen, buflen = alts->extralen; 542 unsigned int nformats = 0, nframes = 0, nintervals = 0; 543 unsigned int size, i, n, p; 544 __u32 *interval; 545 __u16 psize; 546 int ret = -EINVAL; 547 548 if (intf->cur_altsetting->desc.bInterfaceSubClass 549 != UVC_SC_VIDEOSTREAMING) { 550 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 551 "video streaming interface\n", dev->udev->devnum, 552 intf->altsetting[0].desc.bInterfaceNumber); 553 return -EINVAL; 554 } 555 556 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 557 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 558 "claimed\n", dev->udev->devnum, 559 intf->altsetting[0].desc.bInterfaceNumber); 560 return -EINVAL; 561 } 562 563 streaming = kzalloc(sizeof *streaming, GFP_KERNEL); 564 if (streaming == NULL) { 565 usb_driver_release_interface(&uvc_driver.driver, intf); 566 return -EINVAL; 567 } 568 569 mutex_init(&streaming->mutex); 570 streaming->dev = dev; 571 streaming->intf = usb_get_intf(intf); 572 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 573 574 /* The Pico iMage webcam has its class-specific interface descriptors 575 * after the endpoint descriptors. 576 */ 577 if (buflen == 0) { 578 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 579 struct usb_host_endpoint *ep = &alts->endpoint[i]; 580 581 if (ep->extralen == 0) 582 continue; 583 584 if (ep->extralen > 2 && 585 ep->extra[1] == USB_DT_CS_INTERFACE) { 586 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 587 "from endpoint %u.\n", i); 588 buffer = alts->endpoint[i].extra; 589 buflen = alts->endpoint[i].extralen; 590 break; 591 } 592 } 593 } 594 595 /* Skip the standard interface descriptors. */ 596 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 597 buflen -= buffer[0]; 598 buffer += buffer[0]; 599 } 600 601 if (buflen <= 2) { 602 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 603 "interface descriptors found.\n"); 604 goto error; 605 } 606 607 /* Parse the header descriptor. */ 608 switch (buffer[2]) { 609 case UVC_VS_OUTPUT_HEADER: 610 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 611 size = 9; 612 break; 613 614 case UVC_VS_INPUT_HEADER: 615 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 616 size = 13; 617 break; 618 619 default: 620 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 621 "%d HEADER descriptor not found.\n", dev->udev->devnum, 622 alts->desc.bInterfaceNumber); 623 goto error; 624 } 625 626 p = buflen >= 4 ? buffer[3] : 0; 627 n = buflen >= size ? buffer[size-1] : 0; 628 629 if (buflen < size + p*n) { 630 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 631 "interface %d HEADER descriptor is invalid.\n", 632 dev->udev->devnum, alts->desc.bInterfaceNumber); 633 goto error; 634 } 635 636 streaming->header.bNumFormats = p; 637 streaming->header.bEndpointAddress = buffer[6]; 638 if (buffer[2] == UVC_VS_INPUT_HEADER) { 639 streaming->header.bmInfo = buffer[7]; 640 streaming->header.bTerminalLink = buffer[8]; 641 streaming->header.bStillCaptureMethod = buffer[9]; 642 streaming->header.bTriggerSupport = buffer[10]; 643 streaming->header.bTriggerUsage = buffer[11]; 644 } else { 645 streaming->header.bTerminalLink = buffer[7]; 646 } 647 streaming->header.bControlSize = n; 648 649 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 650 GFP_KERNEL); 651 if (streaming->header.bmaControls == NULL) { 652 ret = -ENOMEM; 653 goto error; 654 } 655 656 buflen -= buffer[0]; 657 buffer += buffer[0]; 658 659 _buffer = buffer; 660 _buflen = buflen; 661 662 /* Count the format and frame descriptors. */ 663 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 664 switch (_buffer[2]) { 665 case UVC_VS_FORMAT_UNCOMPRESSED: 666 case UVC_VS_FORMAT_MJPEG: 667 case UVC_VS_FORMAT_FRAME_BASED: 668 nformats++; 669 break; 670 671 case UVC_VS_FORMAT_DV: 672 /* DV format has no frame descriptor. We will create a 673 * dummy frame descriptor with a dummy frame interval. 674 */ 675 nformats++; 676 nframes++; 677 nintervals++; 678 break; 679 680 case UVC_VS_FORMAT_MPEG2TS: 681 case UVC_VS_FORMAT_STREAM_BASED: 682 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 683 "interface %d FORMAT %u is not supported.\n", 684 dev->udev->devnum, 685 alts->desc.bInterfaceNumber, _buffer[2]); 686 break; 687 688 case UVC_VS_FRAME_UNCOMPRESSED: 689 case UVC_VS_FRAME_MJPEG: 690 nframes++; 691 if (_buflen > 25) 692 nintervals += _buffer[25] ? _buffer[25] : 3; 693 break; 694 695 case UVC_VS_FRAME_FRAME_BASED: 696 nframes++; 697 if (_buflen > 21) 698 nintervals += _buffer[21] ? _buffer[21] : 3; 699 break; 700 } 701 702 _buflen -= _buffer[0]; 703 _buffer += _buffer[0]; 704 } 705 706 if (nformats == 0) { 707 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 708 "%d has no supported formats defined.\n", 709 dev->udev->devnum, alts->desc.bInterfaceNumber); 710 goto error; 711 } 712 713 size = nformats * sizeof *format + nframes * sizeof *frame 714 + nintervals * sizeof *interval; 715 format = kzalloc(size, GFP_KERNEL); 716 if (format == NULL) { 717 ret = -ENOMEM; 718 goto error; 719 } 720 721 frame = (struct uvc_frame *)&format[nformats]; 722 interval = (__u32 *)&frame[nframes]; 723 724 streaming->format = format; 725 streaming->nformats = nformats; 726 727 /* Parse the format descriptors. */ 728 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 729 switch (buffer[2]) { 730 case UVC_VS_FORMAT_UNCOMPRESSED: 731 case UVC_VS_FORMAT_MJPEG: 732 case UVC_VS_FORMAT_DV: 733 case UVC_VS_FORMAT_FRAME_BASED: 734 format->frame = frame; 735 ret = uvc_parse_format(dev, streaming, format, 736 &interval, buffer, buflen); 737 if (ret < 0) 738 goto error; 739 740 frame += format->nframes; 741 format++; 742 743 buflen -= ret; 744 buffer += ret; 745 continue; 746 747 default: 748 break; 749 } 750 751 buflen -= buffer[0]; 752 buffer += buffer[0]; 753 } 754 755 if (buflen) 756 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 757 "%d has %u bytes of trailing descriptor garbage.\n", 758 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 759 760 /* Parse the alternate settings to find the maximum bandwidth. */ 761 for (i = 0; i < intf->num_altsetting; ++i) { 762 struct usb_host_endpoint *ep; 763 alts = &intf->altsetting[i]; 764 ep = uvc_find_endpoint(alts, 765 streaming->header.bEndpointAddress); 766 if (ep == NULL) 767 continue; 768 769 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 770 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 771 if (psize > streaming->maxpsize) 772 streaming->maxpsize = psize; 773 } 774 775 list_add_tail(&streaming->list, &dev->streams); 776 return 0; 777 778error: 779 usb_driver_release_interface(&uvc_driver.driver, intf); 780 usb_put_intf(intf); 781 kfree(streaming->format); 782 kfree(streaming->header.bmaControls); 783 kfree(streaming); 784 return ret; 785} 786 787static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 788 unsigned int num_pads, unsigned int extra_size) 789{ 790 struct uvc_entity *entity; 791 unsigned int num_inputs; 792 unsigned int size; 793 794 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 795 size = sizeof(*entity) + extra_size + num_inputs; 796 entity = kzalloc(size, GFP_KERNEL); 797 if (entity == NULL) 798 return NULL; 799 800 entity->id = id; 801 entity->type = type; 802 803 entity->bNrInPins = num_inputs; 804 entity->baSourceID = ((__u8 *)entity) + sizeof(*entity) + extra_size; 805 806 return entity; 807} 808 809/* Parse vendor-specific extensions. */ 810static int uvc_parse_vendor_control(struct uvc_device *dev, 811 const unsigned char *buffer, int buflen) 812{ 813 struct usb_device *udev = dev->udev; 814 struct usb_host_interface *alts = dev->intf->cur_altsetting; 815 struct uvc_entity *unit; 816 unsigned int n, p; 817 int handled = 0; 818 819 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 820 case 0x046d: /* Logitech */ 821 if (buffer[1] != 0x41 || buffer[2] != 0x01) 822 break; 823 824 /* Logitech implements several vendor specific functions 825 * through vendor specific extension units (LXU). 826 * 827 * The LXU descriptors are similar to XU descriptors 828 * (see "USB Device Video Class for Video Devices", section 829 * 3.7.2.6 "Extension Unit Descriptor") with the following 830 * differences: 831 * 832 * ---------------------------------------------------------- 833 * 0 bLength 1 Number 834 * Size of this descriptor, in bytes: 24+p+n*2 835 * ---------------------------------------------------------- 836 * 23+p+n bmControlsType N Bitmap 837 * Individual bits in the set are defined: 838 * 0: Absolute 839 * 1: Relative 840 * 841 * This bitset is mapped exactly the same as bmControls. 842 * ---------------------------------------------------------- 843 * 23+p+n*2 bReserved 1 Boolean 844 * ---------------------------------------------------------- 845 * 24+p+n*2 iExtension 1 Index 846 * Index of a string descriptor that describes this 847 * extension unit. 848 * ---------------------------------------------------------- 849 */ 850 p = buflen >= 22 ? buffer[21] : 0; 851 n = buflen >= 25 + p ? buffer[22+p] : 0; 852 853 if (buflen < 25 + p + 2*n) { 854 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 855 "interface %d EXTENSION_UNIT error\n", 856 udev->devnum, alts->desc.bInterfaceNumber); 857 break; 858 } 859 860 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 861 p + 1, 2*n); 862 if (unit == NULL) 863 return -ENOMEM; 864 865 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 866 unit->extension.bNumControls = buffer[20]; 867 memcpy(unit->baSourceID, &buffer[22], p); 868 unit->extension.bControlSize = buffer[22+p]; 869 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit); 870 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit) 871 + n; 872 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 873 874 if (buffer[24+p+2*n] != 0) 875 usb_string(udev, buffer[24+p+2*n], unit->name, 876 sizeof unit->name); 877 else 878 sprintf(unit->name, "Extension %u", buffer[3]); 879 880 list_add_tail(&unit->list, &dev->entities); 881 handled = 1; 882 break; 883 } 884 885 return handled; 886} 887 888static int uvc_parse_standard_control(struct uvc_device *dev, 889 const unsigned char *buffer, int buflen) 890{ 891 struct usb_device *udev = dev->udev; 892 struct uvc_entity *unit, *term; 893 struct usb_interface *intf; 894 struct usb_host_interface *alts = dev->intf->cur_altsetting; 895 unsigned int i, n, p, len; 896 __u16 type; 897 898 switch (buffer[2]) { 899 case UVC_VC_HEADER: 900 n = buflen >= 12 ? buffer[11] : 0; 901 902 if (buflen < 12 || buflen < 12 + n) { 903 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 904 "interface %d HEADER error\n", udev->devnum, 905 alts->desc.bInterfaceNumber); 906 return -EINVAL; 907 } 908 909 dev->uvc_version = get_unaligned_le16(&buffer[3]); 910 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 911 912 /* Parse all USB Video Streaming interfaces. */ 913 for (i = 0; i < n; ++i) { 914 intf = usb_ifnum_to_if(udev, buffer[12+i]); 915 if (intf == NULL) { 916 uvc_trace(UVC_TRACE_DESCR, "device %d " 917 "interface %d doesn't exists\n", 918 udev->devnum, i); 919 continue; 920 } 921 922 uvc_parse_streaming(dev, intf); 923 } 924 break; 925 926 case UVC_VC_INPUT_TERMINAL: 927 if (buflen < 8) { 928 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 929 "interface %d INPUT_TERMINAL error\n", 930 udev->devnum, alts->desc.bInterfaceNumber); 931 return -EINVAL; 932 } 933 934 /* Make sure the terminal type MSB is not null, otherwise it 935 * could be confused with a unit. 936 */ 937 type = get_unaligned_le16(&buffer[4]); 938 if ((type & 0xff00) == 0) { 939 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 940 "interface %d INPUT_TERMINAL %d has invalid " 941 "type 0x%04x, skipping\n", udev->devnum, 942 alts->desc.bInterfaceNumber, 943 buffer[3], type); 944 return 0; 945 } 946 947 n = 0; 948 p = 0; 949 len = 8; 950 951 if (type == UVC_ITT_CAMERA) { 952 n = buflen >= 15 ? buffer[14] : 0; 953 len = 15; 954 955 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 956 n = buflen >= 9 ? buffer[8] : 0; 957 p = buflen >= 10 + n ? buffer[9+n] : 0; 958 len = 10; 959 } 960 961 if (buflen < len + n + p) { 962 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 963 "interface %d INPUT_TERMINAL error\n", 964 udev->devnum, alts->desc.bInterfaceNumber); 965 return -EINVAL; 966 } 967 968 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 969 1, n + p); 970 if (term == NULL) 971 return -ENOMEM; 972 973 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 974 term->camera.bControlSize = n; 975 term->camera.bmControls = (__u8 *)term + sizeof *term; 976 term->camera.wObjectiveFocalLengthMin = 977 get_unaligned_le16(&buffer[8]); 978 term->camera.wObjectiveFocalLengthMax = 979 get_unaligned_le16(&buffer[10]); 980 term->camera.wOcularFocalLength = 981 get_unaligned_le16(&buffer[12]); 982 memcpy(term->camera.bmControls, &buffer[15], n); 983 } else if (UVC_ENTITY_TYPE(term) == 984 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 985 term->media.bControlSize = n; 986 term->media.bmControls = (__u8 *)term + sizeof *term; 987 term->media.bTransportModeSize = p; 988 term->media.bmTransportModes = (__u8 *)term 989 + sizeof *term + n; 990 memcpy(term->media.bmControls, &buffer[9], n); 991 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 992 } 993 994 if (buffer[7] != 0) 995 usb_string(udev, buffer[7], term->name, 996 sizeof term->name); 997 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 998 sprintf(term->name, "Camera %u", buffer[3]); 999 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1000 sprintf(term->name, "Media %u", buffer[3]); 1001 else 1002 sprintf(term->name, "Input %u", buffer[3]); 1003 1004 list_add_tail(&term->list, &dev->entities); 1005 break; 1006 1007 case UVC_VC_OUTPUT_TERMINAL: 1008 if (buflen < 9) { 1009 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1010 "interface %d OUTPUT_TERMINAL error\n", 1011 udev->devnum, alts->desc.bInterfaceNumber); 1012 return -EINVAL; 1013 } 1014 1015 /* Make sure the terminal type MSB is not null, otherwise it 1016 * could be confused with a unit. 1017 */ 1018 type = get_unaligned_le16(&buffer[4]); 1019 if ((type & 0xff00) == 0) { 1020 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1021 "interface %d OUTPUT_TERMINAL %d has invalid " 1022 "type 0x%04x, skipping\n", udev->devnum, 1023 alts->desc.bInterfaceNumber, buffer[3], type); 1024 return 0; 1025 } 1026 1027 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1028 1, 0); 1029 if (term == NULL) 1030 return -ENOMEM; 1031 1032 memcpy(term->baSourceID, &buffer[7], 1); 1033 1034 if (buffer[8] != 0) 1035 usb_string(udev, buffer[8], term->name, 1036 sizeof term->name); 1037 else 1038 sprintf(term->name, "Output %u", buffer[3]); 1039 1040 list_add_tail(&term->list, &dev->entities); 1041 break; 1042 1043 case UVC_VC_SELECTOR_UNIT: 1044 p = buflen >= 5 ? buffer[4] : 0; 1045 1046 if (buflen < 5 || buflen < 6 + p) { 1047 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1048 "interface %d SELECTOR_UNIT error\n", 1049 udev->devnum, alts->desc.bInterfaceNumber); 1050 return -EINVAL; 1051 } 1052 1053 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1054 if (unit == NULL) 1055 return -ENOMEM; 1056 1057 memcpy(unit->baSourceID, &buffer[5], p); 1058 1059 if (buffer[5+p] != 0) 1060 usb_string(udev, buffer[5+p], unit->name, 1061 sizeof unit->name); 1062 else 1063 sprintf(unit->name, "Selector %u", buffer[3]); 1064 1065 list_add_tail(&unit->list, &dev->entities); 1066 break; 1067 1068 case UVC_VC_PROCESSING_UNIT: 1069 n = buflen >= 8 ? buffer[7] : 0; 1070 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1071 1072 if (buflen < p + n) { 1073 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1074 "interface %d PROCESSING_UNIT error\n", 1075 udev->devnum, alts->desc.bInterfaceNumber); 1076 return -EINVAL; 1077 } 1078 1079 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1080 if (unit == NULL) 1081 return -ENOMEM; 1082 1083 memcpy(unit->baSourceID, &buffer[4], 1); 1084 unit->processing.wMaxMultiplier = 1085 get_unaligned_le16(&buffer[5]); 1086 unit->processing.bControlSize = buffer[7]; 1087 unit->processing.bmControls = (__u8 *)unit + sizeof *unit; 1088 memcpy(unit->processing.bmControls, &buffer[8], n); 1089 if (dev->uvc_version >= 0x0110) 1090 unit->processing.bmVideoStandards = buffer[9+n]; 1091 1092 if (buffer[8+n] != 0) 1093 usb_string(udev, buffer[8+n], unit->name, 1094 sizeof unit->name); 1095 else 1096 sprintf(unit->name, "Processing %u", buffer[3]); 1097 1098 list_add_tail(&unit->list, &dev->entities); 1099 break; 1100 1101 case UVC_VC_EXTENSION_UNIT: 1102 p = buflen >= 22 ? buffer[21] : 0; 1103 n = buflen >= 24 + p ? buffer[22+p] : 0; 1104 1105 if (buflen < 24 + p + n) { 1106 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1107 "interface %d EXTENSION_UNIT error\n", 1108 udev->devnum, alts->desc.bInterfaceNumber); 1109 return -EINVAL; 1110 } 1111 1112 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1113 if (unit == NULL) 1114 return -ENOMEM; 1115 1116 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1117 unit->extension.bNumControls = buffer[20]; 1118 memcpy(unit->baSourceID, &buffer[22], p); 1119 unit->extension.bControlSize = buffer[22+p]; 1120 unit->extension.bmControls = (__u8 *)unit + sizeof *unit; 1121 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1122 1123 if (buffer[23+p+n] != 0) 1124 usb_string(udev, buffer[23+p+n], unit->name, 1125 sizeof unit->name); 1126 else 1127 sprintf(unit->name, "Extension %u", buffer[3]); 1128 1129 list_add_tail(&unit->list, &dev->entities); 1130 break; 1131 1132 default: 1133 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1134 "descriptor (%u)\n", buffer[2]); 1135 break; 1136 } 1137 1138 return 0; 1139} 1140 1141static int uvc_parse_control(struct uvc_device *dev) 1142{ 1143 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1144 unsigned char *buffer = alts->extra; 1145 int buflen = alts->extralen; 1146 int ret; 1147 1148 /* Parse the default alternate setting only, as the UVC specification 1149 * defines a single alternate setting, the default alternate setting 1150 * zero. 1151 */ 1152 1153 while (buflen > 2) { 1154 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1155 buffer[1] != USB_DT_CS_INTERFACE) 1156 goto next_descriptor; 1157 1158 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1159 return ret; 1160 1161next_descriptor: 1162 buflen -= buffer[0]; 1163 buffer += buffer[0]; 1164 } 1165 1166 /* Check if the optional status endpoint is present. Built-in iSight 1167 * webcams have an interrupt endpoint but spit proprietary data that 1168 * don't conform to the UVC status endpoint messages. Don't try to 1169 * handle the interrupt endpoint for those cameras. 1170 */ 1171 if (alts->desc.bNumEndpoints == 1 && 1172 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1173 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1174 struct usb_endpoint_descriptor *desc = &ep->desc; 1175 1176 if (usb_endpoint_is_int_in(desc) && 1177 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1178 desc->bInterval != 0) { 1179 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1180 "(addr %02x).\n", desc->bEndpointAddress); 1181 dev->int_ep = ep; 1182 } 1183 } 1184 1185 return 0; 1186} 1187 1188/* ------------------------------------------------------------------------ 1189 * UVC device scan 1190 */ 1191 1192/* 1193 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1194 * and containing the following units: 1195 * 1196 * - one or more Output Terminals (USB Streaming or Display) 1197 * - zero or one Processing Unit 1198 * - zero, one or more single-input Selector Units 1199 * - zero or one multiple-input Selector Units, provided all inputs are 1200 * connected to input terminals 1201 * - zero, one or mode single-input Extension Units 1202 * - one or more Input Terminals (Camera, External or USB Streaming) 1203 * 1204 * The terminal and units must match on of the following structures: 1205 * 1206 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1207 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1208 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1209 * 1210 * +---------+ +---------+ -> OTT_*(0) 1211 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1212 * +---------+ +---------+ -> OTT_*(n) 1213 * 1214 * The Processing Unit and Extension Units can be in any order. Additional 1215 * Extension Units connected to the main chain as single-unit branches are 1216 * also supported. Single-input Selector Units are ignored. 1217 */ 1218static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1219 struct uvc_entity *entity) 1220{ 1221 switch (UVC_ENTITY_TYPE(entity)) { 1222 case UVC_VC_EXTENSION_UNIT: 1223 if (uvc_trace_param & UVC_TRACE_PROBE) 1224 printk(" <- XU %d", entity->id); 1225 1226 if (entity->bNrInPins != 1) { 1227 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1228 "than 1 input pin.\n", entity->id); 1229 return -1; 1230 } 1231 1232 break; 1233 1234 case UVC_VC_PROCESSING_UNIT: 1235 if (uvc_trace_param & UVC_TRACE_PROBE) 1236 printk(" <- PU %d", entity->id); 1237 1238 if (chain->processing != NULL) { 1239 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1240 "Processing Units in chain.\n"); 1241 return -1; 1242 } 1243 1244 chain->processing = entity; 1245 break; 1246 1247 case UVC_VC_SELECTOR_UNIT: 1248 if (uvc_trace_param & UVC_TRACE_PROBE) 1249 printk(" <- SU %d", entity->id); 1250 1251 /* Single-input selector units are ignored. */ 1252 if (entity->bNrInPins == 1) 1253 break; 1254 1255 if (chain->selector != NULL) { 1256 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1257 "Units in chain.\n"); 1258 return -1; 1259 } 1260 1261 chain->selector = entity; 1262 break; 1263 1264 case UVC_ITT_VENDOR_SPECIFIC: 1265 case UVC_ITT_CAMERA: 1266 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1267 if (uvc_trace_param & UVC_TRACE_PROBE) 1268 printk(" <- IT %d\n", entity->id); 1269 1270 break; 1271 1272 case UVC_OTT_VENDOR_SPECIFIC: 1273 case UVC_OTT_DISPLAY: 1274 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1275 if (uvc_trace_param & UVC_TRACE_PROBE) 1276 printk(" OT %d", entity->id); 1277 1278 break; 1279 1280 case UVC_TT_STREAMING: 1281 if (UVC_ENTITY_IS_ITERM(entity)) { 1282 if (uvc_trace_param & UVC_TRACE_PROBE) 1283 printk(" <- IT %d\n", entity->id); 1284 } else { 1285 if (uvc_trace_param & UVC_TRACE_PROBE) 1286 printk(" OT %d", entity->id); 1287 } 1288 1289 break; 1290 1291 default: 1292 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1293 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1294 return -1; 1295 } 1296 1297 list_add_tail(&entity->chain, &chain->entities); 1298 return 0; 1299} 1300 1301static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1302 struct uvc_entity *entity, struct uvc_entity *prev) 1303{ 1304 struct uvc_entity *forward; 1305 int found; 1306 1307 /* Forward scan */ 1308 forward = NULL; 1309 found = 0; 1310 1311 while (1) { 1312 forward = uvc_entity_by_reference(chain->dev, entity->id, 1313 forward); 1314 if (forward == NULL) 1315 break; 1316 if (forward == prev) 1317 continue; 1318 1319 switch (UVC_ENTITY_TYPE(forward)) { 1320 case UVC_VC_EXTENSION_UNIT: 1321 if (forward->bNrInPins != 1) { 1322 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1323 "has more than 1 input pin.\n", 1324 entity->id); 1325 return -EINVAL; 1326 } 1327 1328 list_add_tail(&forward->chain, &chain->entities); 1329 if (uvc_trace_param & UVC_TRACE_PROBE) { 1330 if (!found) 1331 printk(" (->"); 1332 1333 printk(" XU %d", forward->id); 1334 found = 1; 1335 } 1336 break; 1337 1338 case UVC_OTT_VENDOR_SPECIFIC: 1339 case UVC_OTT_DISPLAY: 1340 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1341 case UVC_TT_STREAMING: 1342 if (UVC_ENTITY_IS_ITERM(forward)) { 1343 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1344 "terminal %u.\n", forward->id); 1345 return -EINVAL; 1346 } 1347 1348 list_add_tail(&forward->chain, &chain->entities); 1349 if (uvc_trace_param & UVC_TRACE_PROBE) { 1350 if (!found) 1351 printk(" (->"); 1352 1353 printk(" OT %d", forward->id); 1354 found = 1; 1355 } 1356 break; 1357 } 1358 } 1359 if (found) 1360 printk(")"); 1361 1362 return 0; 1363} 1364 1365static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1366 struct uvc_entity **_entity) 1367{ 1368 struct uvc_entity *entity = *_entity; 1369 struct uvc_entity *term; 1370 int id = -EINVAL, i; 1371 1372 switch (UVC_ENTITY_TYPE(entity)) { 1373 case UVC_VC_EXTENSION_UNIT: 1374 case UVC_VC_PROCESSING_UNIT: 1375 id = entity->baSourceID[0]; 1376 break; 1377 1378 case UVC_VC_SELECTOR_UNIT: 1379 /* Single-input selector units are ignored. */ 1380 if (entity->bNrInPins == 1) { 1381 id = entity->baSourceID[0]; 1382 break; 1383 } 1384 1385 if (uvc_trace_param & UVC_TRACE_PROBE) 1386 printk(" <- IT"); 1387 1388 chain->selector = entity; 1389 for (i = 0; i < entity->bNrInPins; ++i) { 1390 id = entity->baSourceID[i]; 1391 term = uvc_entity_by_id(chain->dev, id); 1392 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1393 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1394 "input %d isn't connected to an " 1395 "input terminal\n", entity->id, i); 1396 return -1; 1397 } 1398 1399 if (uvc_trace_param & UVC_TRACE_PROBE) 1400 printk(" %d", term->id); 1401 1402 list_add_tail(&term->chain, &chain->entities); 1403 uvc_scan_chain_forward(chain, term, entity); 1404 } 1405 1406 if (uvc_trace_param & UVC_TRACE_PROBE) 1407 printk("\n"); 1408 1409 id = 0; 1410 break; 1411 1412 case UVC_ITT_VENDOR_SPECIFIC: 1413 case UVC_ITT_CAMERA: 1414 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1415 case UVC_OTT_VENDOR_SPECIFIC: 1416 case UVC_OTT_DISPLAY: 1417 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1418 case UVC_TT_STREAMING: 1419 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1420 break; 1421 } 1422 1423 if (id <= 0) { 1424 *_entity = NULL; 1425 return id; 1426 } 1427 1428 entity = uvc_entity_by_id(chain->dev, id); 1429 if (entity == NULL) { 1430 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1431 "unknown entity %d.\n", id); 1432 return -EINVAL; 1433 } 1434 1435 *_entity = entity; 1436 return 0; 1437} 1438 1439static int uvc_scan_chain(struct uvc_video_chain *chain, 1440 struct uvc_entity *term) 1441{ 1442 struct uvc_entity *entity, *prev; 1443 1444 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1445 1446 entity = term; 1447 prev = NULL; 1448 1449 while (entity != NULL) { 1450 /* Entity must not be part of an existing chain */ 1451 if (entity->chain.next || entity->chain.prev) { 1452 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1453 "entity %d already in chain.\n", entity->id); 1454 return -EINVAL; 1455 } 1456 1457 /* Process entity */ 1458 if (uvc_scan_chain_entity(chain, entity) < 0) 1459 return -EINVAL; 1460 1461 /* Forward scan */ 1462 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1463 return -EINVAL; 1464 1465 /* Backward scan */ 1466 prev = entity; 1467 if (uvc_scan_chain_backward(chain, &entity) < 0) 1468 return -EINVAL; 1469 } 1470 1471 return 0; 1472} 1473 1474static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1475 char *buffer) 1476{ 1477 struct uvc_entity *term; 1478 unsigned int nterms = 0; 1479 char *p = buffer; 1480 1481 list_for_each_entry(term, terms, chain) { 1482 if (!UVC_ENTITY_IS_TERM(term) || 1483 UVC_TERM_DIRECTION(term) != dir) 1484 continue; 1485 1486 if (nterms) 1487 p += sprintf(p, ","); 1488 if (++nterms >= 4) { 1489 p += sprintf(p, "..."); 1490 break; 1491 } 1492 p += sprintf(p, "%u", term->id); 1493 } 1494 1495 return p - buffer; 1496} 1497 1498static const char *uvc_print_chain(struct uvc_video_chain *chain) 1499{ 1500 static char buffer[43]; 1501 char *p = buffer; 1502 1503 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1504 p += sprintf(p, " -> "); 1505 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1506 1507 return buffer; 1508} 1509 1510/* 1511 * Scan the device for video chains and register video devices. 1512 * 1513 * Chains are scanned starting at their output terminals and walked backwards. 1514 */ 1515static int uvc_scan_device(struct uvc_device *dev) 1516{ 1517 struct uvc_video_chain *chain; 1518 struct uvc_entity *term; 1519 1520 list_for_each_entry(term, &dev->entities, list) { 1521 if (!UVC_ENTITY_IS_OTERM(term)) 1522 continue; 1523 1524 /* If the terminal is already included in a chain, skip it. 1525 * This can happen for chains that have multiple output 1526 * terminals, where all output terminals beside the first one 1527 * will be inserted in the chain in forward scans. 1528 */ 1529 if (term->chain.next || term->chain.prev) 1530 continue; 1531 1532 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1533 if (chain == NULL) 1534 return -ENOMEM; 1535 1536 INIT_LIST_HEAD(&chain->entities); 1537 mutex_init(&chain->ctrl_mutex); 1538 chain->dev = dev; 1539 1540 if (uvc_scan_chain(chain, term) < 0) { 1541 kfree(chain); 1542 continue; 1543 } 1544 1545 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1546 uvc_print_chain(chain)); 1547 1548 list_add_tail(&chain->list, &dev->chains); 1549 } 1550 1551 if (list_empty(&dev->chains)) { 1552 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1553 return -1; 1554 } 1555 1556 return 0; 1557} 1558 1559/* ------------------------------------------------------------------------ 1560 * Video device registration and unregistration 1561 */ 1562 1563/* 1564 * Delete the UVC device. 1565 * 1566 * Called by the kernel when the last reference to the uvc_device structure 1567 * is released. 1568 * 1569 * As this function is called after or during disconnect(), all URBs have 1570 * already been canceled by the USB core. There is no need to kill the 1571 * interrupt URB manually. 1572 */ 1573static void uvc_delete(struct uvc_device *dev) 1574{ 1575 struct list_head *p, *n; 1576 1577 usb_put_intf(dev->intf); 1578 usb_put_dev(dev->udev); 1579 1580 uvc_status_cleanup(dev); 1581 uvc_ctrl_cleanup_device(dev); 1582 1583 list_for_each_safe(p, n, &dev->chains) { 1584 struct uvc_video_chain *chain; 1585 chain = list_entry(p, struct uvc_video_chain, list); 1586 kfree(chain); 1587 } 1588 1589 list_for_each_safe(p, n, &dev->entities) { 1590 struct uvc_entity *entity; 1591 entity = list_entry(p, struct uvc_entity, list); 1592 kfree(entity); 1593 } 1594 1595 list_for_each_safe(p, n, &dev->streams) { 1596 struct uvc_streaming *streaming; 1597 streaming = list_entry(p, struct uvc_streaming, list); 1598 usb_driver_release_interface(&uvc_driver.driver, 1599 streaming->intf); 1600 usb_put_intf(streaming->intf); 1601 kfree(streaming->format); 1602 kfree(streaming->header.bmaControls); 1603 kfree(streaming); 1604 } 1605 1606 kfree(dev); 1607} 1608 1609static void uvc_release(struct video_device *vdev) 1610{ 1611 struct uvc_streaming *stream = video_get_drvdata(vdev); 1612 struct uvc_device *dev = stream->dev; 1613 1614 video_device_release(vdev); 1615 1616 /* Decrement the registered streams count and delete the device when it 1617 * reaches zero. 1618 */ 1619 if (atomic_dec_and_test(&dev->nstreams)) 1620 uvc_delete(dev); 1621} 1622 1623/* 1624 * Unregister the video devices. 1625 */ 1626static void uvc_unregister_video(struct uvc_device *dev) 1627{ 1628 struct uvc_streaming *stream; 1629 1630 /* Unregistering all video devices might result in uvc_delete() being 1631 * called from inside the loop if there's no open file handle. To avoid 1632 * that, increment the stream count before iterating over the streams 1633 * and decrement it when done. 1634 */ 1635 atomic_inc(&dev->nstreams); 1636 1637 list_for_each_entry(stream, &dev->streams, list) { 1638 if (stream->vdev == NULL) 1639 continue; 1640 1641 video_unregister_device(stream->vdev); 1642 stream->vdev = NULL; 1643 } 1644 1645 /* Decrement the stream count and call uvc_delete explicitly if there 1646 * are no stream left. 1647 */ 1648 if (atomic_dec_and_test(&dev->nstreams)) 1649 uvc_delete(dev); 1650} 1651 1652static int uvc_register_video(struct uvc_device *dev, 1653 struct uvc_streaming *stream) 1654{ 1655 struct video_device *vdev; 1656 int ret; 1657 1658 /* Initialize the streaming interface with default streaming 1659 * parameters. 1660 */ 1661 ret = uvc_video_init(stream); 1662 if (ret < 0) { 1663 uvc_printk(KERN_ERR, "Failed to initialize the device " 1664 "(%d).\n", ret); 1665 return ret; 1666 } 1667 1668 /* Register the device with V4L. */ 1669 vdev = video_device_alloc(); 1670 if (vdev == NULL) { 1671 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n", 1672 ret); 1673 return -ENOMEM; 1674 } 1675 1676 /* We already hold a reference to dev->udev. The video device will be 1677 * unregistered before the reference is released, so we don't need to 1678 * get another one. 1679 */ 1680 vdev->parent = &dev->intf->dev; 1681 vdev->fops = &uvc_fops; 1682 vdev->release = uvc_release; 1683 strlcpy(vdev->name, dev->name, sizeof vdev->name); 1684 1685 /* Set the driver data before calling video_register_device, otherwise 1686 * uvc_v4l2_open might race us. 1687 */ 1688 stream->vdev = vdev; 1689 video_set_drvdata(vdev, stream); 1690 1691 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1692 if (ret < 0) { 1693 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", 1694 ret); 1695 stream->vdev = NULL; 1696 video_device_release(vdev); 1697 return ret; 1698 } 1699 1700 atomic_inc(&dev->nstreams); 1701 return 0; 1702} 1703 1704/* 1705 * Register all video devices in all chains. 1706 */ 1707static int uvc_register_terms(struct uvc_device *dev, 1708 struct uvc_video_chain *chain) 1709{ 1710 struct uvc_streaming *stream; 1711 struct uvc_entity *term; 1712 int ret; 1713 1714 list_for_each_entry(term, &chain->entities, chain) { 1715 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 1716 continue; 1717 1718 stream = uvc_stream_by_id(dev, term->id); 1719 if (stream == NULL) { 1720 uvc_printk(KERN_INFO, "No streaming interface found " 1721 "for terminal %u.", term->id); 1722 continue; 1723 } 1724 1725 stream->chain = chain; 1726 ret = uvc_register_video(dev, stream); 1727 if (ret < 0) 1728 return ret; 1729 } 1730 1731 return 0; 1732} 1733 1734static int uvc_register_chains(struct uvc_device *dev) 1735{ 1736 struct uvc_video_chain *chain; 1737 int ret; 1738 1739 list_for_each_entry(chain, &dev->chains, list) { 1740 ret = uvc_register_terms(dev, chain); 1741 if (ret < 0) 1742 return ret; 1743 } 1744 1745 return 0; 1746} 1747 1748/* ------------------------------------------------------------------------ 1749 * USB probe, disconnect, suspend and resume 1750 */ 1751 1752static int uvc_probe(struct usb_interface *intf, 1753 const struct usb_device_id *id) 1754{ 1755 struct usb_device *udev = interface_to_usbdev(intf); 1756 struct uvc_device *dev; 1757 int ret; 1758 1759 if (id->idVendor && id->idProduct) 1760 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 1761 "(%04x:%04x)\n", udev->devpath, id->idVendor, 1762 id->idProduct); 1763 else 1764 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 1765 udev->devpath); 1766 1767 /* Allocate memory for the device and initialize it. */ 1768 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL) 1769 return -ENOMEM; 1770 1771 INIT_LIST_HEAD(&dev->entities); 1772 INIT_LIST_HEAD(&dev->chains); 1773 INIT_LIST_HEAD(&dev->streams); 1774 atomic_set(&dev->nstreams, 0); 1775 atomic_set(&dev->users, 0); 1776 atomic_set(&dev->nmappings, 0); 1777 1778 dev->udev = usb_get_dev(udev); 1779 dev->intf = usb_get_intf(intf); 1780 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 1781 dev->quirks = (uvc_quirks_param == -1) 1782 ? id->driver_info : uvc_quirks_param; 1783 1784 if (udev->product != NULL) 1785 strlcpy(dev->name, udev->product, sizeof dev->name); 1786 else 1787 snprintf(dev->name, sizeof dev->name, 1788 "UVC Camera (%04x:%04x)", 1789 le16_to_cpu(udev->descriptor.idVendor), 1790 le16_to_cpu(udev->descriptor.idProduct)); 1791 1792 /* Parse the Video Class control descriptor. */ 1793 if (uvc_parse_control(dev) < 0) { 1794 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 1795 "descriptors.\n"); 1796 goto error; 1797 } 1798 1799 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 1800 dev->uvc_version >> 8, dev->uvc_version & 0xff, 1801 udev->product ? udev->product : "<unnamed>", 1802 le16_to_cpu(udev->descriptor.idVendor), 1803 le16_to_cpu(udev->descriptor.idProduct)); 1804 1805 if (dev->quirks != id->driver_info) { 1806 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 1807 "parameter for testing purpose.\n", dev->quirks); 1808 uvc_printk(KERN_INFO, "Please report required quirks to the " 1809 "linux-uvc-devel mailing list.\n"); 1810 } 1811 1812 /* Initialize controls. */ 1813 if (uvc_ctrl_init_device(dev) < 0) 1814 goto error; 1815 1816 /* Scan the device for video chains. */ 1817 if (uvc_scan_device(dev) < 0) 1818 goto error; 1819 1820 /* Register video devices. */ 1821 if (uvc_register_chains(dev) < 0) 1822 goto error; 1823 1824 /* Save our data pointer in the interface data. */ 1825 usb_set_intfdata(intf, dev); 1826 1827 /* Initialize the interrupt URB. */ 1828 if ((ret = uvc_status_init(dev)) < 0) { 1829 uvc_printk(KERN_INFO, "Unable to initialize the status " 1830 "endpoint (%d), status interrupt will not be " 1831 "supported.\n", ret); 1832 } 1833 1834 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 1835 usb_enable_autosuspend(udev); 1836 return 0; 1837 1838error: 1839 uvc_unregister_video(dev); 1840 return -ENODEV; 1841} 1842 1843static void uvc_disconnect(struct usb_interface *intf) 1844{ 1845 struct uvc_device *dev = usb_get_intfdata(intf); 1846 1847 /* Set the USB interface data to NULL. This can be done outside the 1848 * lock, as there's no other reader. 1849 */ 1850 usb_set_intfdata(intf, NULL); 1851 1852 if (intf->cur_altsetting->desc.bInterfaceSubClass == 1853 UVC_SC_VIDEOSTREAMING) 1854 return; 1855 1856 dev->state |= UVC_DEV_DISCONNECTED; 1857 1858 uvc_unregister_video(dev); 1859} 1860 1861static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 1862{ 1863 struct uvc_device *dev = usb_get_intfdata(intf); 1864 struct uvc_streaming *stream; 1865 1866 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 1867 intf->cur_altsetting->desc.bInterfaceNumber); 1868 1869 /* Controls are cached on the fly so they don't need to be saved. */ 1870 if (intf->cur_altsetting->desc.bInterfaceSubClass == 1871 UVC_SC_VIDEOCONTROL) 1872 return uvc_status_suspend(dev); 1873 1874 list_for_each_entry(stream, &dev->streams, list) { 1875 if (stream->intf == intf) 1876 return uvc_video_suspend(stream); 1877 } 1878 1879 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 1880 "mismatch.\n"); 1881 return -EINVAL; 1882} 1883 1884static int __uvc_resume(struct usb_interface *intf, int reset) 1885{ 1886 struct uvc_device *dev = usb_get_intfdata(intf); 1887 struct uvc_streaming *stream; 1888 1889 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 1890 intf->cur_altsetting->desc.bInterfaceNumber); 1891 1892 if (intf->cur_altsetting->desc.bInterfaceSubClass == 1893 UVC_SC_VIDEOCONTROL) { 1894 if (reset) { 1895 int ret = uvc_ctrl_resume_device(dev); 1896 1897 if (ret < 0) 1898 return ret; 1899 } 1900 1901 return uvc_status_resume(dev); 1902 } 1903 1904 list_for_each_entry(stream, &dev->streams, list) { 1905 if (stream->intf == intf) 1906 return uvc_video_resume(stream); 1907 } 1908 1909 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 1910 "mismatch.\n"); 1911 return -EINVAL; 1912} 1913 1914static int uvc_resume(struct usb_interface *intf) 1915{ 1916 return __uvc_resume(intf, 0); 1917} 1918 1919static int uvc_reset_resume(struct usb_interface *intf) 1920{ 1921 return __uvc_resume(intf, 1); 1922} 1923 1924/* ------------------------------------------------------------------------ 1925 * Module parameters 1926 */ 1927 1928static int uvc_clock_param_get(char *buffer, struct kernel_param *kp) 1929{ 1930 if (uvc_clock_param == CLOCK_MONOTONIC) 1931 return sprintf(buffer, "CLOCK_MONOTONIC"); 1932 else 1933 return sprintf(buffer, "CLOCK_REALTIME"); 1934} 1935 1936static int uvc_clock_param_set(const char *val, struct kernel_param *kp) 1937{ 1938 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 1939 val += strlen("clock_"); 1940 1941 if (strcasecmp(val, "monotonic") == 0) 1942 uvc_clock_param = CLOCK_MONOTONIC; 1943 else if (strcasecmp(val, "realtime") == 0) 1944 uvc_clock_param = CLOCK_REALTIME; 1945 else 1946 return -EINVAL; 1947 1948 return 0; 1949} 1950 1951module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 1952 &uvc_clock_param, S_IRUGO|S_IWUSR); 1953MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 1954module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 1955MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 1956module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 1957MODULE_PARM_DESC(quirks, "Forced device quirks"); 1958module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 1959MODULE_PARM_DESC(trace, "Trace level bitmask"); 1960module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 1961MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 1962 1963/* ------------------------------------------------------------------------ 1964 * Driver initialization and cleanup 1965 */ 1966 1967/* 1968 * The Logitech cameras listed below have their interface class set to 1969 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 1970 * though they are compliant. 1971 */ 1972static struct usb_device_id uvc_ids[] = { 1973 /* Genius eFace 2025 */ 1974 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 1975 | USB_DEVICE_ID_MATCH_INT_INFO, 1976 .idVendor = 0x0458, 1977 .idProduct = 0x706e, 1978 .bInterfaceClass = USB_CLASS_VIDEO, 1979 .bInterfaceSubClass = 1, 1980 .bInterfaceProtocol = 0, 1981 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 1982 /* Microsoft Lifecam NX-6000 */ 1983 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 1984 | USB_DEVICE_ID_MATCH_INT_INFO, 1985 .idVendor = 0x045e, 1986 .idProduct = 0x00f8, 1987 .bInterfaceClass = USB_CLASS_VIDEO, 1988 .bInterfaceSubClass = 1, 1989 .bInterfaceProtocol = 0, 1990 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 1991 /* Microsoft Lifecam VX-7000 */ 1992 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 1993 | USB_DEVICE_ID_MATCH_INT_INFO, 1994 .idVendor = 0x045e, 1995 .idProduct = 0x0723, 1996 .bInterfaceClass = USB_CLASS_VIDEO, 1997 .bInterfaceSubClass = 1, 1998 .bInterfaceProtocol = 0, 1999 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2000 /* Logitech Quickcam Fusion */ 2001 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2002 | USB_DEVICE_ID_MATCH_INT_INFO, 2003 .idVendor = 0x046d, 2004 .idProduct = 0x08c1, 2005 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2006 .bInterfaceSubClass = 1, 2007 .bInterfaceProtocol = 0 }, 2008 /* Logitech Quickcam Orbit MP */ 2009 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2010 | USB_DEVICE_ID_MATCH_INT_INFO, 2011 .idVendor = 0x046d, 2012 .idProduct = 0x08c2, 2013 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2014 .bInterfaceSubClass = 1, 2015 .bInterfaceProtocol = 0 }, 2016 /* Logitech Quickcam Pro for Notebook */ 2017 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2018 | USB_DEVICE_ID_MATCH_INT_INFO, 2019 .idVendor = 0x046d, 2020 .idProduct = 0x08c3, 2021 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2022 .bInterfaceSubClass = 1, 2023 .bInterfaceProtocol = 0 }, 2024 /* Logitech Quickcam Pro 5000 */ 2025 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2026 | USB_DEVICE_ID_MATCH_INT_INFO, 2027 .idVendor = 0x046d, 2028 .idProduct = 0x08c5, 2029 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2030 .bInterfaceSubClass = 1, 2031 .bInterfaceProtocol = 0 }, 2032 /* Logitech Quickcam OEM Dell Notebook */ 2033 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2034 | USB_DEVICE_ID_MATCH_INT_INFO, 2035 .idVendor = 0x046d, 2036 .idProduct = 0x08c6, 2037 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2038 .bInterfaceSubClass = 1, 2039 .bInterfaceProtocol = 0 }, 2040 /* Logitech Quickcam OEM Cisco VT Camera II */ 2041 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2042 | USB_DEVICE_ID_MATCH_INT_INFO, 2043 .idVendor = 0x046d, 2044 .idProduct = 0x08c7, 2045 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2046 .bInterfaceSubClass = 1, 2047 .bInterfaceProtocol = 0 }, 2048 /* Chicony CNF7129 (Asus EEE 100HE) */ 2049 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2050 | USB_DEVICE_ID_MATCH_INT_INFO, 2051 .idVendor = 0x04f2, 2052 .idProduct = 0xb071, 2053 .bInterfaceClass = USB_CLASS_VIDEO, 2054 .bInterfaceSubClass = 1, 2055 .bInterfaceProtocol = 0, 2056 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE }, 2057 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2058 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2059 | USB_DEVICE_ID_MATCH_INT_INFO, 2060 .idVendor = 0x058f, 2061 .idProduct = 0x3820, 2062 .bInterfaceClass = USB_CLASS_VIDEO, 2063 .bInterfaceSubClass = 1, 2064 .bInterfaceProtocol = 0, 2065 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2066 /* Apple Built-In iSight */ 2067 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2068 | USB_DEVICE_ID_MATCH_INT_INFO, 2069 .idVendor = 0x05ac, 2070 .idProduct = 0x8501, 2071 .bInterfaceClass = USB_CLASS_VIDEO, 2072 .bInterfaceSubClass = 1, 2073 .bInterfaceProtocol = 0, 2074 .driver_info = UVC_QUIRK_PROBE_MINMAX 2075 | UVC_QUIRK_BUILTIN_ISIGHT }, 2076 /* Genesys Logic USB 2.0 PC Camera */ 2077 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2078 | USB_DEVICE_ID_MATCH_INT_INFO, 2079 .idVendor = 0x05e3, 2080 .idProduct = 0x0505, 2081 .bInterfaceClass = USB_CLASS_VIDEO, 2082 .bInterfaceSubClass = 1, 2083 .bInterfaceProtocol = 0, 2084 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2085 /* Hercules Classic Silver */ 2086 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2087 | USB_DEVICE_ID_MATCH_INT_INFO, 2088 .idVendor = 0x06f8, 2089 .idProduct = 0x300c, 2090 .bInterfaceClass = USB_CLASS_VIDEO, 2091 .bInterfaceSubClass = 1, 2092 .bInterfaceProtocol = 0, 2093 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2094 /* ViMicro Vega */ 2095 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2096 | USB_DEVICE_ID_MATCH_INT_INFO, 2097 .idVendor = 0x0ac8, 2098 .idProduct = 0x332d, 2099 .bInterfaceClass = USB_CLASS_VIDEO, 2100 .bInterfaceSubClass = 1, 2101 .bInterfaceProtocol = 0, 2102 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2103 /* ViMicro - Minoru3D */ 2104 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2105 | USB_DEVICE_ID_MATCH_INT_INFO, 2106 .idVendor = 0x0ac8, 2107 .idProduct = 0x3410, 2108 .bInterfaceClass = USB_CLASS_VIDEO, 2109 .bInterfaceSubClass = 1, 2110 .bInterfaceProtocol = 0, 2111 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2112 /* ViMicro Venus - Minoru3D */ 2113 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2114 | USB_DEVICE_ID_MATCH_INT_INFO, 2115 .idVendor = 0x0ac8, 2116 .idProduct = 0x3420, 2117 .bInterfaceClass = USB_CLASS_VIDEO, 2118 .bInterfaceSubClass = 1, 2119 .bInterfaceProtocol = 0, 2120 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2121 /* MT6227 */ 2122 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2123 | USB_DEVICE_ID_MATCH_INT_INFO, 2124 .idVendor = 0x0e8d, 2125 .idProduct = 0x0004, 2126 .bInterfaceClass = USB_CLASS_VIDEO, 2127 .bInterfaceSubClass = 1, 2128 .bInterfaceProtocol = 0, 2129 .driver_info = UVC_QUIRK_PROBE_MINMAX 2130 | UVC_QUIRK_PROBE_DEF }, 2131 /* IMC Networks (Medion Akoya) */ 2132 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2133 | USB_DEVICE_ID_MATCH_INT_INFO, 2134 .idVendor = 0x13d3, 2135 .idProduct = 0x5103, 2136 .bInterfaceClass = USB_CLASS_VIDEO, 2137 .bInterfaceSubClass = 1, 2138 .bInterfaceProtocol = 0, 2139 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2140 /* JMicron USB2.0 XGA WebCam */ 2141 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2142 | USB_DEVICE_ID_MATCH_INT_INFO, 2143 .idVendor = 0x152d, 2144 .idProduct = 0x0310, 2145 .bInterfaceClass = USB_CLASS_VIDEO, 2146 .bInterfaceSubClass = 1, 2147 .bInterfaceProtocol = 0, 2148 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2149 /* Syntek (HP Spartan) */ 2150 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2151 | USB_DEVICE_ID_MATCH_INT_INFO, 2152 .idVendor = 0x174f, 2153 .idProduct = 0x5212, 2154 .bInterfaceClass = USB_CLASS_VIDEO, 2155 .bInterfaceSubClass = 1, 2156 .bInterfaceProtocol = 0, 2157 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2158 /* Syntek (Samsung Q310) */ 2159 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2160 | USB_DEVICE_ID_MATCH_INT_INFO, 2161 .idVendor = 0x174f, 2162 .idProduct = 0x5931, 2163 .bInterfaceClass = USB_CLASS_VIDEO, 2164 .bInterfaceSubClass = 1, 2165 .bInterfaceProtocol = 0, 2166 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2167 /* Syntek (Packard Bell EasyNote MX52 */ 2168 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2169 | USB_DEVICE_ID_MATCH_INT_INFO, 2170 .idVendor = 0x174f, 2171 .idProduct = 0x8a12, 2172 .bInterfaceClass = USB_CLASS_VIDEO, 2173 .bInterfaceSubClass = 1, 2174 .bInterfaceProtocol = 0, 2175 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2176 /* Syntek (Asus F9SG) */ 2177 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2178 | USB_DEVICE_ID_MATCH_INT_INFO, 2179 .idVendor = 0x174f, 2180 .idProduct = 0x8a31, 2181 .bInterfaceClass = USB_CLASS_VIDEO, 2182 .bInterfaceSubClass = 1, 2183 .bInterfaceProtocol = 0, 2184 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2185 /* Syntek (Asus U3S) */ 2186 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2187 | USB_DEVICE_ID_MATCH_INT_INFO, 2188 .idVendor = 0x174f, 2189 .idProduct = 0x8a33, 2190 .bInterfaceClass = USB_CLASS_VIDEO, 2191 .bInterfaceSubClass = 1, 2192 .bInterfaceProtocol = 0, 2193 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2194 /* Syntek (JAOtech Smart Terminal) */ 2195 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2196 | USB_DEVICE_ID_MATCH_INT_INFO, 2197 .idVendor = 0x174f, 2198 .idProduct = 0x8a34, 2199 .bInterfaceClass = USB_CLASS_VIDEO, 2200 .bInterfaceSubClass = 1, 2201 .bInterfaceProtocol = 0, 2202 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2203 /* Miricle 307K */ 2204 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2205 | USB_DEVICE_ID_MATCH_INT_INFO, 2206 .idVendor = 0x17dc, 2207 .idProduct = 0x0202, 2208 .bInterfaceClass = USB_CLASS_VIDEO, 2209 .bInterfaceSubClass = 1, 2210 .bInterfaceProtocol = 0, 2211 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2212 /* Lenovo Thinkpad SL400/SL500 */ 2213 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2214 | USB_DEVICE_ID_MATCH_INT_INFO, 2215 .idVendor = 0x17ef, 2216 .idProduct = 0x480b, 2217 .bInterfaceClass = USB_CLASS_VIDEO, 2218 .bInterfaceSubClass = 1, 2219 .bInterfaceProtocol = 0, 2220 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2221 /* Aveo Technology USB 2.0 Camera */ 2222 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2223 | USB_DEVICE_ID_MATCH_INT_INFO, 2224 .idVendor = 0x1871, 2225 .idProduct = 0x0306, 2226 .bInterfaceClass = USB_CLASS_VIDEO, 2227 .bInterfaceSubClass = 1, 2228 .bInterfaceProtocol = 0, 2229 .driver_info = UVC_QUIRK_PROBE_MINMAX 2230 | UVC_QUIRK_PROBE_EXTRAFIELDS }, 2231 /* Ecamm Pico iMage */ 2232 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2233 | USB_DEVICE_ID_MATCH_INT_INFO, 2234 .idVendor = 0x18cd, 2235 .idProduct = 0xcafe, 2236 .bInterfaceClass = USB_CLASS_VIDEO, 2237 .bInterfaceSubClass = 1, 2238 .bInterfaceProtocol = 0, 2239 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS }, 2240 /* Manta MM-353 Plako */ 2241 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2242 | USB_DEVICE_ID_MATCH_INT_INFO, 2243 .idVendor = 0x18ec, 2244 .idProduct = 0x3188, 2245 .bInterfaceClass = USB_CLASS_VIDEO, 2246 .bInterfaceSubClass = 1, 2247 .bInterfaceProtocol = 0, 2248 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2249 /* FSC WebCam V30S */ 2250 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2251 | USB_DEVICE_ID_MATCH_INT_INFO, 2252 .idVendor = 0x18ec, 2253 .idProduct = 0x3288, 2254 .bInterfaceClass = USB_CLASS_VIDEO, 2255 .bInterfaceSubClass = 1, 2256 .bInterfaceProtocol = 0, 2257 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2258 /* Arkmicro unbranded */ 2259 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2260 | USB_DEVICE_ID_MATCH_INT_INFO, 2261 .idVendor = 0x18ec, 2262 .idProduct = 0x3290, 2263 .bInterfaceClass = USB_CLASS_VIDEO, 2264 .bInterfaceSubClass = 1, 2265 .bInterfaceProtocol = 0, 2266 .driver_info = UVC_QUIRK_PROBE_DEF }, 2267 /* Bodelin ProScopeHR */ 2268 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2269 | USB_DEVICE_ID_MATCH_DEV_HI 2270 | USB_DEVICE_ID_MATCH_INT_INFO, 2271 .idVendor = 0x19ab, 2272 .idProduct = 0x1000, 2273 .bcdDevice_hi = 0x0126, 2274 .bInterfaceClass = USB_CLASS_VIDEO, 2275 .bInterfaceSubClass = 1, 2276 .bInterfaceProtocol = 0, 2277 .driver_info = UVC_QUIRK_STATUS_INTERVAL }, 2278 /* MSI StarCam 370i */ 2279 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2280 | USB_DEVICE_ID_MATCH_INT_INFO, 2281 .idVendor = 0x1b3b, 2282 .idProduct = 0x2951, 2283 .bInterfaceClass = USB_CLASS_VIDEO, 2284 .bInterfaceSubClass = 1, 2285 .bInterfaceProtocol = 0, 2286 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2287 /* SiGma Micro USB Web Camera */ 2288 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2289 | USB_DEVICE_ID_MATCH_INT_INFO, 2290 .idVendor = 0x1c4f, 2291 .idProduct = 0x3000, 2292 .bInterfaceClass = USB_CLASS_VIDEO, 2293 .bInterfaceSubClass = 1, 2294 .bInterfaceProtocol = 0, 2295 .driver_info = UVC_QUIRK_PROBE_MINMAX 2296 | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, 2297 /* Generic USB Video Class */ 2298 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, 2299 {} 2300}; 2301 2302MODULE_DEVICE_TABLE(usb, uvc_ids); 2303 2304struct uvc_driver uvc_driver = { 2305 .driver = { 2306 .name = "uvcvideo", 2307 .probe = uvc_probe, 2308 .disconnect = uvc_disconnect, 2309 .suspend = uvc_suspend, 2310 .resume = uvc_resume, 2311 .reset_resume = uvc_reset_resume, 2312 .id_table = uvc_ids, 2313 .supports_autosuspend = 1, 2314 }, 2315}; 2316 2317static int __init uvc_init(void) 2318{ 2319 int result; 2320 2321 result = usb_register(&uvc_driver.driver); 2322 if (result == 0) 2323 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2324 return result; 2325} 2326 2327static void __exit uvc_cleanup(void) 2328{ 2329 usb_deregister(&uvc_driver.driver); 2330} 2331 2332module_init(uvc_init); 2333module_exit(uvc_cleanup); 2334 2335MODULE_AUTHOR(DRIVER_AUTHOR); 2336MODULE_DESCRIPTION(DRIVER_DESC); 2337MODULE_LICENSE("GPL"); 2338MODULE_VERSION(DRIVER_VERSION); 2339 2340