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