1 /* 2 * uvc_driver.c -- USB Video Class driver 3 * 4 * Copyright (C) 2005-2010 5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 */ 13 14 #include <linux/atomic.h> 15 #include <linux/kernel.h> 16 #include <linux/list.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <linux/usb.h> 20 #include <linux/videodev2.h> 21 #include <linux/vmalloc.h> 22 #include <linux/wait.h> 23 #include <linux/version.h> 24 #include <asm/unaligned.h> 25 26 #include <media/v4l2-common.h> 27 28 #include "uvcvideo.h" 29 30 #define DRIVER_AUTHOR "Laurent Pinchart " \ 31 "<laurent.pinchart@ideasonboard.com>" 32 #define DRIVER_DESC "USB Video Class driver" 33 34 unsigned int uvc_clock_param = CLOCK_MONOTONIC; 35 unsigned int uvc_no_drop_param; 36 static unsigned int uvc_quirks_param = -1; 37 unsigned int uvc_trace_param; 38 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 39 40 /* ------------------------------------------------------------------------ 41 * Video formats 42 */ 43 44 static struct uvc_format_desc uvc_fmts[] = { 45 { 46 .name = "YUV 4:2:2 (YUYV)", 47 .guid = UVC_GUID_FORMAT_YUY2, 48 .fcc = V4L2_PIX_FMT_YUYV, 49 }, 50 { 51 .name = "YUV 4:2:2 (YUYV)", 52 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 53 .fcc = V4L2_PIX_FMT_YUYV, 54 }, 55 { 56 .name = "YUV 4:2:0 (NV12)", 57 .guid = UVC_GUID_FORMAT_NV12, 58 .fcc = V4L2_PIX_FMT_NV12, 59 }, 60 { 61 .name = "MJPEG", 62 .guid = UVC_GUID_FORMAT_MJPEG, 63 .fcc = V4L2_PIX_FMT_MJPEG, 64 }, 65 { 66 .name = "YVU 4:2:0 (YV12)", 67 .guid = UVC_GUID_FORMAT_YV12, 68 .fcc = V4L2_PIX_FMT_YVU420, 69 }, 70 { 71 .name = "YUV 4:2:0 (I420)", 72 .guid = UVC_GUID_FORMAT_I420, 73 .fcc = V4L2_PIX_FMT_YUV420, 74 }, 75 { 76 .name = "YUV 4:2:0 (M420)", 77 .guid = UVC_GUID_FORMAT_M420, 78 .fcc = V4L2_PIX_FMT_M420, 79 }, 80 { 81 .name = "YUV 4:2:2 (UYVY)", 82 .guid = UVC_GUID_FORMAT_UYVY, 83 .fcc = V4L2_PIX_FMT_UYVY, 84 }, 85 { 86 .name = "Greyscale 8-bit (Y800)", 87 .guid = UVC_GUID_FORMAT_Y800, 88 .fcc = V4L2_PIX_FMT_GREY, 89 }, 90 { 91 .name = "Greyscale 8-bit (Y8 )", 92 .guid = UVC_GUID_FORMAT_Y8, 93 .fcc = V4L2_PIX_FMT_GREY, 94 }, 95 { 96 .name = "Greyscale 10-bit (Y10 )", 97 .guid = UVC_GUID_FORMAT_Y10, 98 .fcc = V4L2_PIX_FMT_Y10, 99 }, 100 { 101 .name = "Greyscale 12-bit (Y12 )", 102 .guid = UVC_GUID_FORMAT_Y12, 103 .fcc = V4L2_PIX_FMT_Y12, 104 }, 105 { 106 .name = "Greyscale 16-bit (Y16 )", 107 .guid = UVC_GUID_FORMAT_Y16, 108 .fcc = V4L2_PIX_FMT_Y16, 109 }, 110 { 111 .name = "BGGR Bayer (BY8 )", 112 .guid = UVC_GUID_FORMAT_BY8, 113 .fcc = V4L2_PIX_FMT_SBGGR8, 114 }, 115 { 116 .name = "BGGR Bayer (BA81)", 117 .guid = UVC_GUID_FORMAT_BA81, 118 .fcc = V4L2_PIX_FMT_SBGGR8, 119 }, 120 { 121 .name = "GBRG Bayer (GBRG)", 122 .guid = UVC_GUID_FORMAT_GBRG, 123 .fcc = V4L2_PIX_FMT_SGBRG8, 124 }, 125 { 126 .name = "GRBG Bayer (GRBG)", 127 .guid = UVC_GUID_FORMAT_GRBG, 128 .fcc = V4L2_PIX_FMT_SGRBG8, 129 }, 130 { 131 .name = "RGGB Bayer (RGGB)", 132 .guid = UVC_GUID_FORMAT_RGGB, 133 .fcc = V4L2_PIX_FMT_SRGGB8, 134 }, 135 { 136 .name = "RGB565", 137 .guid = UVC_GUID_FORMAT_RGBP, 138 .fcc = V4L2_PIX_FMT_RGB565, 139 }, 140 { 141 .name = "H.264", 142 .guid = UVC_GUID_FORMAT_H264, 143 .fcc = V4L2_PIX_FMT_H264, 144 }, 145 }; 146 147 /* ------------------------------------------------------------------------ 148 * Utility functions 149 */ 150 151 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 152 __u8 epaddr) 153 { 154 struct usb_host_endpoint *ep; 155 unsigned int i; 156 157 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 158 ep = &alts->endpoint[i]; 159 if (ep->desc.bEndpointAddress == epaddr) 160 return ep; 161 } 162 163 return NULL; 164 } 165 166 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16]) 167 { 168 unsigned int len = ARRAY_SIZE(uvc_fmts); 169 unsigned int i; 170 171 for (i = 0; i < len; ++i) { 172 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) 173 return &uvc_fmts[i]; 174 } 175 176 return NULL; 177 } 178 179 static __u32 uvc_colorspace(const __u8 primaries) 180 { 181 static const __u8 colorprimaries[] = { 182 0, 183 V4L2_COLORSPACE_SRGB, 184 V4L2_COLORSPACE_470_SYSTEM_M, 185 V4L2_COLORSPACE_470_SYSTEM_BG, 186 V4L2_COLORSPACE_SMPTE170M, 187 V4L2_COLORSPACE_SMPTE240M, 188 }; 189 190 if (primaries < ARRAY_SIZE(colorprimaries)) 191 return colorprimaries[primaries]; 192 193 return 0; 194 } 195 196 /* Simplify a fraction using a simple continued fraction decomposition. The 197 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 198 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 199 * arbitrary parameters to remove non-significative terms from the simple 200 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 201 * respectively seems to give nice results. 202 */ 203 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, 204 unsigned int n_terms, unsigned int threshold) 205 { 206 uint32_t *an; 207 uint32_t x, y, r; 208 unsigned int i, n; 209 210 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL); 211 if (an == NULL) 212 return; 213 214 /* Convert the fraction to a simple continued fraction. See 215 * http://mathforum.org/dr.math/faq/faq.fractions.html 216 * Stop if the current term is bigger than or equal to the given 217 * threshold. 218 */ 219 x = *numerator; 220 y = *denominator; 221 222 for (n = 0; n < n_terms && y != 0; ++n) { 223 an[n] = x / y; 224 if (an[n] >= threshold) { 225 if (n < 2) 226 n++; 227 break; 228 } 229 230 r = x - an[n] * y; 231 x = y; 232 y = r; 233 } 234 235 /* Expand the simple continued fraction back to an integer fraction. */ 236 x = 0; 237 y = 1; 238 239 for (i = n; i > 0; --i) { 240 r = y; 241 y = an[i-1] * y + x; 242 x = r; 243 } 244 245 *numerator = y; 246 *denominator = x; 247 kfree(an); 248 } 249 250 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is 251 * to compute numerator / denominator * 10000000 using 32 bit fixed point 252 * arithmetic only. 253 */ 254 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator) 255 { 256 uint32_t multiplier; 257 258 /* Saturate the result if the operation would overflow. */ 259 if (denominator == 0 || 260 numerator/denominator >= ((uint32_t)-1)/10000000) 261 return (uint32_t)-1; 262 263 /* Divide both the denominator and the multiplier by two until 264 * numerator * multiplier doesn't overflow. If anyone knows a better 265 * algorithm please let me know. 266 */ 267 multiplier = 10000000; 268 while (numerator > ((uint32_t)-1)/multiplier) { 269 multiplier /= 2; 270 denominator /= 2; 271 } 272 273 return denominator ? numerator * multiplier / denominator : 0; 274 } 275 276 /* ------------------------------------------------------------------------ 277 * Terminal and unit management 278 */ 279 280 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 281 { 282 struct uvc_entity *entity; 283 284 list_for_each_entry(entity, &dev->entities, list) { 285 if (entity->id == id) 286 return entity; 287 } 288 289 return NULL; 290 } 291 292 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 293 int id, struct uvc_entity *entity) 294 { 295 unsigned int i; 296 297 if (entity == NULL) 298 entity = list_entry(&dev->entities, struct uvc_entity, list); 299 300 list_for_each_entry_continue(entity, &dev->entities, list) { 301 for (i = 0; i < entity->bNrInPins; ++i) 302 if (entity->baSourceID[i] == id) 303 return entity; 304 } 305 306 return NULL; 307 } 308 309 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 310 { 311 struct uvc_streaming *stream; 312 313 list_for_each_entry(stream, &dev->streams, list) { 314 if (stream->header.bTerminalLink == id) 315 return stream; 316 } 317 318 return NULL; 319 } 320 321 /* ------------------------------------------------------------------------ 322 * Descriptors parsing 323 */ 324 325 static int uvc_parse_format(struct uvc_device *dev, 326 struct uvc_streaming *streaming, struct uvc_format *format, 327 __u32 **intervals, unsigned char *buffer, int buflen) 328 { 329 struct usb_interface *intf = streaming->intf; 330 struct usb_host_interface *alts = intf->cur_altsetting; 331 struct uvc_format_desc *fmtdesc; 332 struct uvc_frame *frame; 333 const unsigned char *start = buffer; 334 unsigned int width_multiplier = 1; 335 unsigned int interval; 336 unsigned int i, n; 337 __u8 ftype; 338 339 format->type = buffer[2]; 340 format->index = buffer[3]; 341 342 switch (buffer[2]) { 343 case UVC_VS_FORMAT_UNCOMPRESSED: 344 case UVC_VS_FORMAT_FRAME_BASED: 345 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 346 if (buflen < n) { 347 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 348 "interface %d FORMAT error\n", 349 dev->udev->devnum, 350 alts->desc.bInterfaceNumber); 351 return -EINVAL; 352 } 353 354 /* Find the format descriptor from its GUID. */ 355 fmtdesc = uvc_format_by_guid(&buffer[5]); 356 357 if (fmtdesc != NULL) { 358 strlcpy(format->name, fmtdesc->name, 359 sizeof format->name); 360 format->fcc = fmtdesc->fcc; 361 } else { 362 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 363 &buffer[5]); 364 snprintf(format->name, sizeof(format->name), "%pUl\n", 365 &buffer[5]); 366 format->fcc = 0; 367 } 368 369 format->bpp = buffer[21]; 370 371 /* Some devices report a format that doesn't match what they 372 * really send. 373 */ 374 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 375 if (format->fcc == V4L2_PIX_FMT_YUYV) { 376 strlcpy(format->name, "Greyscale 8-bit (Y8 )", 377 sizeof(format->name)); 378 format->fcc = V4L2_PIX_FMT_GREY; 379 format->bpp = 8; 380 width_multiplier = 2; 381 } 382 } 383 384 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 385 ftype = UVC_VS_FRAME_UNCOMPRESSED; 386 } else { 387 ftype = UVC_VS_FRAME_FRAME_BASED; 388 if (buffer[27]) 389 format->flags = UVC_FMT_FLAG_COMPRESSED; 390 } 391 break; 392 393 case UVC_VS_FORMAT_MJPEG: 394 if (buflen < 11) { 395 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 396 "interface %d FORMAT error\n", 397 dev->udev->devnum, 398 alts->desc.bInterfaceNumber); 399 return -EINVAL; 400 } 401 402 strlcpy(format->name, "MJPEG", sizeof format->name); 403 format->fcc = V4L2_PIX_FMT_MJPEG; 404 format->flags = UVC_FMT_FLAG_COMPRESSED; 405 format->bpp = 0; 406 ftype = UVC_VS_FRAME_MJPEG; 407 break; 408 409 case UVC_VS_FORMAT_DV: 410 if (buflen < 9) { 411 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 412 "interface %d FORMAT error\n", 413 dev->udev->devnum, 414 alts->desc.bInterfaceNumber); 415 return -EINVAL; 416 } 417 418 switch (buffer[8] & 0x7f) { 419 case 0: 420 strlcpy(format->name, "SD-DV", sizeof format->name); 421 break; 422 case 1: 423 strlcpy(format->name, "SDL-DV", sizeof format->name); 424 break; 425 case 2: 426 strlcpy(format->name, "HD-DV", sizeof format->name); 427 break; 428 default: 429 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 430 "interface %d: unknown DV format %u\n", 431 dev->udev->devnum, 432 alts->desc.bInterfaceNumber, buffer[8]); 433 return -EINVAL; 434 } 435 436 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 437 sizeof format->name); 438 439 format->fcc = V4L2_PIX_FMT_DV; 440 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 441 format->bpp = 0; 442 ftype = 0; 443 444 /* Create a dummy frame descriptor. */ 445 frame = &format->frame[0]; 446 memset(&format->frame[0], 0, sizeof format->frame[0]); 447 frame->bFrameIntervalType = 1; 448 frame->dwDefaultFrameInterval = 1; 449 frame->dwFrameInterval = *intervals; 450 *(*intervals)++ = 1; 451 format->nframes = 1; 452 break; 453 454 case UVC_VS_FORMAT_MPEG2TS: 455 case UVC_VS_FORMAT_STREAM_BASED: 456 /* Not supported yet. */ 457 default: 458 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 459 "interface %d unsupported format %u\n", 460 dev->udev->devnum, alts->desc.bInterfaceNumber, 461 buffer[2]); 462 return -EINVAL; 463 } 464 465 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 466 467 buflen -= buffer[0]; 468 buffer += buffer[0]; 469 470 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 471 * based formats have frame descriptors. 472 */ 473 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 474 buffer[2] == ftype) { 475 frame = &format->frame[format->nframes]; 476 if (ftype != UVC_VS_FRAME_FRAME_BASED) 477 n = buflen > 25 ? buffer[25] : 0; 478 else 479 n = buflen > 21 ? buffer[21] : 0; 480 481 n = n ? n : 3; 482 483 if (buflen < 26 + 4*n) { 484 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 485 "interface %d FRAME error\n", dev->udev->devnum, 486 alts->desc.bInterfaceNumber); 487 return -EINVAL; 488 } 489 490 frame->bFrameIndex = buffer[3]; 491 frame->bmCapabilities = buffer[4]; 492 frame->wWidth = get_unaligned_le16(&buffer[5]) 493 * width_multiplier; 494 frame->wHeight = get_unaligned_le16(&buffer[7]); 495 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 496 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 497 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 498 frame->dwMaxVideoFrameBufferSize = 499 get_unaligned_le32(&buffer[17]); 500 frame->dwDefaultFrameInterval = 501 get_unaligned_le32(&buffer[21]); 502 frame->bFrameIntervalType = buffer[25]; 503 } else { 504 frame->dwMaxVideoFrameBufferSize = 0; 505 frame->dwDefaultFrameInterval = 506 get_unaligned_le32(&buffer[17]); 507 frame->bFrameIntervalType = buffer[21]; 508 } 509 frame->dwFrameInterval = *intervals; 510 511 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 512 * completely. Observed behaviours range from setting the 513 * value to 1.1x the actual frame size to hardwiring the 514 * 16 low bits to 0. This results in a higher than necessary 515 * memory usage as well as a wrong image size information. For 516 * uncompressed formats this can be fixed by computing the 517 * value from the frame size. 518 */ 519 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 520 frame->dwMaxVideoFrameBufferSize = format->bpp 521 * frame->wWidth * frame->wHeight / 8; 522 523 /* Some bogus devices report dwMinFrameInterval equal to 524 * dwMaxFrameInterval and have dwFrameIntervalStep set to 525 * zero. Setting all null intervals to 1 fixes the problem and 526 * some other divisions by zero that could happen. 527 */ 528 for (i = 0; i < n; ++i) { 529 interval = get_unaligned_le32(&buffer[26+4*i]); 530 *(*intervals)++ = interval ? interval : 1; 531 } 532 533 /* Make sure that the default frame interval stays between 534 * the boundaries. 535 */ 536 n -= frame->bFrameIntervalType ? 1 : 2; 537 frame->dwDefaultFrameInterval = 538 min(frame->dwFrameInterval[n], 539 max(frame->dwFrameInterval[0], 540 frame->dwDefaultFrameInterval)); 541 542 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 543 frame->bFrameIntervalType = 1; 544 frame->dwFrameInterval[0] = 545 frame->dwDefaultFrameInterval; 546 } 547 548 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 549 frame->wWidth, frame->wHeight, 550 10000000/frame->dwDefaultFrameInterval, 551 (100000000/frame->dwDefaultFrameInterval)%10); 552 553 format->nframes++; 554 buflen -= buffer[0]; 555 buffer += buffer[0]; 556 } 557 558 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 559 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 560 buflen -= buffer[0]; 561 buffer += buffer[0]; 562 } 563 564 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 565 buffer[2] == UVC_VS_COLORFORMAT) { 566 if (buflen < 6) { 567 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 568 "interface %d COLORFORMAT error\n", 569 dev->udev->devnum, 570 alts->desc.bInterfaceNumber); 571 return -EINVAL; 572 } 573 574 format->colorspace = uvc_colorspace(buffer[3]); 575 576 buflen -= buffer[0]; 577 buffer += buffer[0]; 578 } 579 580 return buffer - start; 581 } 582 583 static int uvc_parse_streaming(struct uvc_device *dev, 584 struct usb_interface *intf) 585 { 586 struct uvc_streaming *streaming = NULL; 587 struct uvc_format *format; 588 struct uvc_frame *frame; 589 struct usb_host_interface *alts = &intf->altsetting[0]; 590 unsigned char *_buffer, *buffer = alts->extra; 591 int _buflen, buflen = alts->extralen; 592 unsigned int nformats = 0, nframes = 0, nintervals = 0; 593 unsigned int size, i, n, p; 594 __u32 *interval; 595 __u16 psize; 596 int ret = -EINVAL; 597 598 if (intf->cur_altsetting->desc.bInterfaceSubClass 599 != UVC_SC_VIDEOSTREAMING) { 600 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 601 "video streaming interface\n", dev->udev->devnum, 602 intf->altsetting[0].desc.bInterfaceNumber); 603 return -EINVAL; 604 } 605 606 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 607 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 608 "claimed\n", dev->udev->devnum, 609 intf->altsetting[0].desc.bInterfaceNumber); 610 return -EINVAL; 611 } 612 613 streaming = kzalloc(sizeof *streaming, GFP_KERNEL); 614 if (streaming == NULL) { 615 usb_driver_release_interface(&uvc_driver.driver, intf); 616 return -EINVAL; 617 } 618 619 mutex_init(&streaming->mutex); 620 streaming->dev = dev; 621 streaming->intf = usb_get_intf(intf); 622 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 623 624 /* The Pico iMage webcam has its class-specific interface descriptors 625 * after the endpoint descriptors. 626 */ 627 if (buflen == 0) { 628 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 629 struct usb_host_endpoint *ep = &alts->endpoint[i]; 630 631 if (ep->extralen == 0) 632 continue; 633 634 if (ep->extralen > 2 && 635 ep->extra[1] == USB_DT_CS_INTERFACE) { 636 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 637 "from endpoint %u.\n", i); 638 buffer = alts->endpoint[i].extra; 639 buflen = alts->endpoint[i].extralen; 640 break; 641 } 642 } 643 } 644 645 /* Skip the standard interface descriptors. */ 646 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 647 buflen -= buffer[0]; 648 buffer += buffer[0]; 649 } 650 651 if (buflen <= 2) { 652 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 653 "interface descriptors found.\n"); 654 goto error; 655 } 656 657 /* Parse the header descriptor. */ 658 switch (buffer[2]) { 659 case UVC_VS_OUTPUT_HEADER: 660 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 661 size = 9; 662 break; 663 664 case UVC_VS_INPUT_HEADER: 665 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 666 size = 13; 667 break; 668 669 default: 670 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 671 "%d HEADER descriptor not found.\n", dev->udev->devnum, 672 alts->desc.bInterfaceNumber); 673 goto error; 674 } 675 676 p = buflen >= 4 ? buffer[3] : 0; 677 n = buflen >= size ? buffer[size-1] : 0; 678 679 if (buflen < size + p*n) { 680 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 681 "interface %d HEADER descriptor is invalid.\n", 682 dev->udev->devnum, alts->desc.bInterfaceNumber); 683 goto error; 684 } 685 686 streaming->header.bNumFormats = p; 687 streaming->header.bEndpointAddress = buffer[6]; 688 if (buffer[2] == UVC_VS_INPUT_HEADER) { 689 streaming->header.bmInfo = buffer[7]; 690 streaming->header.bTerminalLink = buffer[8]; 691 streaming->header.bStillCaptureMethod = buffer[9]; 692 streaming->header.bTriggerSupport = buffer[10]; 693 streaming->header.bTriggerUsage = buffer[11]; 694 } else { 695 streaming->header.bTerminalLink = buffer[7]; 696 } 697 streaming->header.bControlSize = n; 698 699 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 700 GFP_KERNEL); 701 if (streaming->header.bmaControls == NULL) { 702 ret = -ENOMEM; 703 goto error; 704 } 705 706 buflen -= buffer[0]; 707 buffer += buffer[0]; 708 709 _buffer = buffer; 710 _buflen = buflen; 711 712 /* Count the format and frame descriptors. */ 713 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 714 switch (_buffer[2]) { 715 case UVC_VS_FORMAT_UNCOMPRESSED: 716 case UVC_VS_FORMAT_MJPEG: 717 case UVC_VS_FORMAT_FRAME_BASED: 718 nformats++; 719 break; 720 721 case UVC_VS_FORMAT_DV: 722 /* DV format has no frame descriptor. We will create a 723 * dummy frame descriptor with a dummy frame interval. 724 */ 725 nformats++; 726 nframes++; 727 nintervals++; 728 break; 729 730 case UVC_VS_FORMAT_MPEG2TS: 731 case UVC_VS_FORMAT_STREAM_BASED: 732 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 733 "interface %d FORMAT %u is not supported.\n", 734 dev->udev->devnum, 735 alts->desc.bInterfaceNumber, _buffer[2]); 736 break; 737 738 case UVC_VS_FRAME_UNCOMPRESSED: 739 case UVC_VS_FRAME_MJPEG: 740 nframes++; 741 if (_buflen > 25) 742 nintervals += _buffer[25] ? _buffer[25] : 3; 743 break; 744 745 case UVC_VS_FRAME_FRAME_BASED: 746 nframes++; 747 if (_buflen > 21) 748 nintervals += _buffer[21] ? _buffer[21] : 3; 749 break; 750 } 751 752 _buflen -= _buffer[0]; 753 _buffer += _buffer[0]; 754 } 755 756 if (nformats == 0) { 757 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 758 "%d has no supported formats defined.\n", 759 dev->udev->devnum, alts->desc.bInterfaceNumber); 760 goto error; 761 } 762 763 size = nformats * sizeof *format + nframes * sizeof *frame 764 + nintervals * sizeof *interval; 765 format = kzalloc(size, GFP_KERNEL); 766 if (format == NULL) { 767 ret = -ENOMEM; 768 goto error; 769 } 770 771 frame = (struct uvc_frame *)&format[nformats]; 772 interval = (__u32 *)&frame[nframes]; 773 774 streaming->format = format; 775 streaming->nformats = nformats; 776 777 /* Parse the format descriptors. */ 778 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 779 switch (buffer[2]) { 780 case UVC_VS_FORMAT_UNCOMPRESSED: 781 case UVC_VS_FORMAT_MJPEG: 782 case UVC_VS_FORMAT_DV: 783 case UVC_VS_FORMAT_FRAME_BASED: 784 format->frame = frame; 785 ret = uvc_parse_format(dev, streaming, format, 786 &interval, buffer, buflen); 787 if (ret < 0) 788 goto error; 789 790 frame += format->nframes; 791 format++; 792 793 buflen -= ret; 794 buffer += ret; 795 continue; 796 797 default: 798 break; 799 } 800 801 buflen -= buffer[0]; 802 buffer += buffer[0]; 803 } 804 805 if (buflen) 806 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 807 "%d has %u bytes of trailing descriptor garbage.\n", 808 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 809 810 /* Parse the alternate settings to find the maximum bandwidth. */ 811 for (i = 0; i < intf->num_altsetting; ++i) { 812 struct usb_host_endpoint *ep; 813 alts = &intf->altsetting[i]; 814 ep = uvc_find_endpoint(alts, 815 streaming->header.bEndpointAddress); 816 if (ep == NULL) 817 continue; 818 819 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 820 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 821 if (psize > streaming->maxpsize) 822 streaming->maxpsize = psize; 823 } 824 825 list_add_tail(&streaming->list, &dev->streams); 826 return 0; 827 828 error: 829 usb_driver_release_interface(&uvc_driver.driver, intf); 830 usb_put_intf(intf); 831 kfree(streaming->format); 832 kfree(streaming->header.bmaControls); 833 kfree(streaming); 834 return ret; 835 } 836 837 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 838 unsigned int num_pads, unsigned int extra_size) 839 { 840 struct uvc_entity *entity; 841 unsigned int num_inputs; 842 unsigned int size; 843 unsigned int i; 844 845 extra_size = ALIGN(extra_size, sizeof(*entity->pads)); 846 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 847 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 848 + num_inputs; 849 entity = kzalloc(size, GFP_KERNEL); 850 if (entity == NULL) 851 return NULL; 852 853 entity->id = id; 854 entity->type = type; 855 856 entity->num_links = 0; 857 entity->num_pads = num_pads; 858 entity->pads = ((void *)(entity + 1)) + extra_size; 859 860 for (i = 0; i < num_inputs; ++i) 861 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 862 if (!UVC_ENTITY_IS_OTERM(entity)) 863 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 864 865 entity->bNrInPins = num_inputs; 866 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]); 867 868 return entity; 869 } 870 871 /* Parse vendor-specific extensions. */ 872 static int uvc_parse_vendor_control(struct uvc_device *dev, 873 const unsigned char *buffer, int buflen) 874 { 875 struct usb_device *udev = dev->udev; 876 struct usb_host_interface *alts = dev->intf->cur_altsetting; 877 struct uvc_entity *unit; 878 unsigned int n, p; 879 int handled = 0; 880 881 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 882 case 0x046d: /* Logitech */ 883 if (buffer[1] != 0x41 || buffer[2] != 0x01) 884 break; 885 886 /* Logitech implements several vendor specific functions 887 * through vendor specific extension units (LXU). 888 * 889 * The LXU descriptors are similar to XU descriptors 890 * (see "USB Device Video Class for Video Devices", section 891 * 3.7.2.6 "Extension Unit Descriptor") with the following 892 * differences: 893 * 894 * ---------------------------------------------------------- 895 * 0 bLength 1 Number 896 * Size of this descriptor, in bytes: 24+p+n*2 897 * ---------------------------------------------------------- 898 * 23+p+n bmControlsType N Bitmap 899 * Individual bits in the set are defined: 900 * 0: Absolute 901 * 1: Relative 902 * 903 * This bitset is mapped exactly the same as bmControls. 904 * ---------------------------------------------------------- 905 * 23+p+n*2 bReserved 1 Boolean 906 * ---------------------------------------------------------- 907 * 24+p+n*2 iExtension 1 Index 908 * Index of a string descriptor that describes this 909 * extension unit. 910 * ---------------------------------------------------------- 911 */ 912 p = buflen >= 22 ? buffer[21] : 0; 913 n = buflen >= 25 + p ? buffer[22+p] : 0; 914 915 if (buflen < 25 + p + 2*n) { 916 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 917 "interface %d EXTENSION_UNIT error\n", 918 udev->devnum, alts->desc.bInterfaceNumber); 919 break; 920 } 921 922 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 923 p + 1, 2*n); 924 if (unit == NULL) 925 return -ENOMEM; 926 927 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 928 unit->extension.bNumControls = buffer[20]; 929 memcpy(unit->baSourceID, &buffer[22], p); 930 unit->extension.bControlSize = buffer[22+p]; 931 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit); 932 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit) 933 + n; 934 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 935 936 if (buffer[24+p+2*n] != 0) 937 usb_string(udev, buffer[24+p+2*n], unit->name, 938 sizeof unit->name); 939 else 940 sprintf(unit->name, "Extension %u", buffer[3]); 941 942 list_add_tail(&unit->list, &dev->entities); 943 handled = 1; 944 break; 945 } 946 947 return handled; 948 } 949 950 static int uvc_parse_standard_control(struct uvc_device *dev, 951 const unsigned char *buffer, int buflen) 952 { 953 struct usb_device *udev = dev->udev; 954 struct uvc_entity *unit, *term; 955 struct usb_interface *intf; 956 struct usb_host_interface *alts = dev->intf->cur_altsetting; 957 unsigned int i, n, p, len; 958 __u16 type; 959 960 switch (buffer[2]) { 961 case UVC_VC_HEADER: 962 n = buflen >= 12 ? buffer[11] : 0; 963 964 if (buflen < 12 + n) { 965 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 966 "interface %d HEADER error\n", udev->devnum, 967 alts->desc.bInterfaceNumber); 968 return -EINVAL; 969 } 970 971 dev->uvc_version = get_unaligned_le16(&buffer[3]); 972 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 973 974 /* Parse all USB Video Streaming interfaces. */ 975 for (i = 0; i < n; ++i) { 976 intf = usb_ifnum_to_if(udev, buffer[12+i]); 977 if (intf == NULL) { 978 uvc_trace(UVC_TRACE_DESCR, "device %d " 979 "interface %d doesn't exists\n", 980 udev->devnum, i); 981 continue; 982 } 983 984 uvc_parse_streaming(dev, intf); 985 } 986 break; 987 988 case UVC_VC_INPUT_TERMINAL: 989 if (buflen < 8) { 990 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 991 "interface %d INPUT_TERMINAL error\n", 992 udev->devnum, alts->desc.bInterfaceNumber); 993 return -EINVAL; 994 } 995 996 /* Make sure the terminal type MSB is not null, otherwise it 997 * could be confused with a unit. 998 */ 999 type = get_unaligned_le16(&buffer[4]); 1000 if ((type & 0xff00) == 0) { 1001 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1002 "interface %d INPUT_TERMINAL %d has invalid " 1003 "type 0x%04x, skipping\n", udev->devnum, 1004 alts->desc.bInterfaceNumber, 1005 buffer[3], type); 1006 return 0; 1007 } 1008 1009 n = 0; 1010 p = 0; 1011 len = 8; 1012 1013 if (type == UVC_ITT_CAMERA) { 1014 n = buflen >= 15 ? buffer[14] : 0; 1015 len = 15; 1016 1017 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1018 n = buflen >= 9 ? buffer[8] : 0; 1019 p = buflen >= 10 + n ? buffer[9+n] : 0; 1020 len = 10; 1021 } 1022 1023 if (buflen < len + n + p) { 1024 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1025 "interface %d INPUT_TERMINAL error\n", 1026 udev->devnum, alts->desc.bInterfaceNumber); 1027 return -EINVAL; 1028 } 1029 1030 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1031 1, n + p); 1032 if (term == NULL) 1033 return -ENOMEM; 1034 1035 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1036 term->camera.bControlSize = n; 1037 term->camera.bmControls = (__u8 *)term + sizeof *term; 1038 term->camera.wObjectiveFocalLengthMin = 1039 get_unaligned_le16(&buffer[8]); 1040 term->camera.wObjectiveFocalLengthMax = 1041 get_unaligned_le16(&buffer[10]); 1042 term->camera.wOcularFocalLength = 1043 get_unaligned_le16(&buffer[12]); 1044 memcpy(term->camera.bmControls, &buffer[15], n); 1045 } else if (UVC_ENTITY_TYPE(term) == 1046 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1047 term->media.bControlSize = n; 1048 term->media.bmControls = (__u8 *)term + sizeof *term; 1049 term->media.bTransportModeSize = p; 1050 term->media.bmTransportModes = (__u8 *)term 1051 + sizeof *term + n; 1052 memcpy(term->media.bmControls, &buffer[9], n); 1053 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1054 } 1055 1056 if (buffer[7] != 0) 1057 usb_string(udev, buffer[7], term->name, 1058 sizeof term->name); 1059 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1060 sprintf(term->name, "Camera %u", buffer[3]); 1061 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1062 sprintf(term->name, "Media %u", buffer[3]); 1063 else 1064 sprintf(term->name, "Input %u", buffer[3]); 1065 1066 list_add_tail(&term->list, &dev->entities); 1067 break; 1068 1069 case UVC_VC_OUTPUT_TERMINAL: 1070 if (buflen < 9) { 1071 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1072 "interface %d OUTPUT_TERMINAL error\n", 1073 udev->devnum, alts->desc.bInterfaceNumber); 1074 return -EINVAL; 1075 } 1076 1077 /* Make sure the terminal type MSB is not null, otherwise it 1078 * could be confused with a unit. 1079 */ 1080 type = get_unaligned_le16(&buffer[4]); 1081 if ((type & 0xff00) == 0) { 1082 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1083 "interface %d OUTPUT_TERMINAL %d has invalid " 1084 "type 0x%04x, skipping\n", udev->devnum, 1085 alts->desc.bInterfaceNumber, buffer[3], type); 1086 return 0; 1087 } 1088 1089 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1090 1, 0); 1091 if (term == NULL) 1092 return -ENOMEM; 1093 1094 memcpy(term->baSourceID, &buffer[7], 1); 1095 1096 if (buffer[8] != 0) 1097 usb_string(udev, buffer[8], term->name, 1098 sizeof term->name); 1099 else 1100 sprintf(term->name, "Output %u", buffer[3]); 1101 1102 list_add_tail(&term->list, &dev->entities); 1103 break; 1104 1105 case UVC_VC_SELECTOR_UNIT: 1106 p = buflen >= 5 ? buffer[4] : 0; 1107 1108 if (buflen < 5 || buflen < 6 + p) { 1109 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1110 "interface %d SELECTOR_UNIT error\n", 1111 udev->devnum, alts->desc.bInterfaceNumber); 1112 return -EINVAL; 1113 } 1114 1115 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1116 if (unit == NULL) 1117 return -ENOMEM; 1118 1119 memcpy(unit->baSourceID, &buffer[5], p); 1120 1121 if (buffer[5+p] != 0) 1122 usb_string(udev, buffer[5+p], unit->name, 1123 sizeof unit->name); 1124 else 1125 sprintf(unit->name, "Selector %u", buffer[3]); 1126 1127 list_add_tail(&unit->list, &dev->entities); 1128 break; 1129 1130 case UVC_VC_PROCESSING_UNIT: 1131 n = buflen >= 8 ? buffer[7] : 0; 1132 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1133 1134 if (buflen < p + n) { 1135 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1136 "interface %d PROCESSING_UNIT error\n", 1137 udev->devnum, alts->desc.bInterfaceNumber); 1138 return -EINVAL; 1139 } 1140 1141 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1142 if (unit == NULL) 1143 return -ENOMEM; 1144 1145 memcpy(unit->baSourceID, &buffer[4], 1); 1146 unit->processing.wMaxMultiplier = 1147 get_unaligned_le16(&buffer[5]); 1148 unit->processing.bControlSize = buffer[7]; 1149 unit->processing.bmControls = (__u8 *)unit + sizeof *unit; 1150 memcpy(unit->processing.bmControls, &buffer[8], n); 1151 if (dev->uvc_version >= 0x0110) 1152 unit->processing.bmVideoStandards = buffer[9+n]; 1153 1154 if (buffer[8+n] != 0) 1155 usb_string(udev, buffer[8+n], unit->name, 1156 sizeof unit->name); 1157 else 1158 sprintf(unit->name, "Processing %u", buffer[3]); 1159 1160 list_add_tail(&unit->list, &dev->entities); 1161 break; 1162 1163 case UVC_VC_EXTENSION_UNIT: 1164 p = buflen >= 22 ? buffer[21] : 0; 1165 n = buflen >= 24 + p ? buffer[22+p] : 0; 1166 1167 if (buflen < 24 + p + n) { 1168 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1169 "interface %d EXTENSION_UNIT error\n", 1170 udev->devnum, alts->desc.bInterfaceNumber); 1171 return -EINVAL; 1172 } 1173 1174 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1175 if (unit == NULL) 1176 return -ENOMEM; 1177 1178 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1179 unit->extension.bNumControls = buffer[20]; 1180 memcpy(unit->baSourceID, &buffer[22], p); 1181 unit->extension.bControlSize = buffer[22+p]; 1182 unit->extension.bmControls = (__u8 *)unit + sizeof *unit; 1183 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1184 1185 if (buffer[23+p+n] != 0) 1186 usb_string(udev, buffer[23+p+n], unit->name, 1187 sizeof unit->name); 1188 else 1189 sprintf(unit->name, "Extension %u", buffer[3]); 1190 1191 list_add_tail(&unit->list, &dev->entities); 1192 break; 1193 1194 default: 1195 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1196 "descriptor (%u)\n", buffer[2]); 1197 break; 1198 } 1199 1200 return 0; 1201 } 1202 1203 static int uvc_parse_control(struct uvc_device *dev) 1204 { 1205 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1206 unsigned char *buffer = alts->extra; 1207 int buflen = alts->extralen; 1208 int ret; 1209 1210 /* Parse the default alternate setting only, as the UVC specification 1211 * defines a single alternate setting, the default alternate setting 1212 * zero. 1213 */ 1214 1215 while (buflen > 2) { 1216 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1217 buffer[1] != USB_DT_CS_INTERFACE) 1218 goto next_descriptor; 1219 1220 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1221 return ret; 1222 1223 next_descriptor: 1224 buflen -= buffer[0]; 1225 buffer += buffer[0]; 1226 } 1227 1228 /* Check if the optional status endpoint is present. Built-in iSight 1229 * webcams have an interrupt endpoint but spit proprietary data that 1230 * don't conform to the UVC status endpoint messages. Don't try to 1231 * handle the interrupt endpoint for those cameras. 1232 */ 1233 if (alts->desc.bNumEndpoints == 1 && 1234 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1235 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1236 struct usb_endpoint_descriptor *desc = &ep->desc; 1237 1238 if (usb_endpoint_is_int_in(desc) && 1239 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1240 desc->bInterval != 0) { 1241 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1242 "(addr %02x).\n", desc->bEndpointAddress); 1243 dev->int_ep = ep; 1244 } 1245 } 1246 1247 return 0; 1248 } 1249 1250 /* ------------------------------------------------------------------------ 1251 * UVC device scan 1252 */ 1253 1254 /* 1255 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1256 * and containing the following units: 1257 * 1258 * - one or more Output Terminals (USB Streaming or Display) 1259 * - zero or one Processing Unit 1260 * - zero, one or more single-input Selector Units 1261 * - zero or one multiple-input Selector Units, provided all inputs are 1262 * connected to input terminals 1263 * - zero, one or mode single-input Extension Units 1264 * - one or more Input Terminals (Camera, External or USB Streaming) 1265 * 1266 * The terminal and units must match on of the following structures: 1267 * 1268 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1269 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1270 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1271 * 1272 * +---------+ +---------+ -> OTT_*(0) 1273 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1274 * +---------+ +---------+ -> OTT_*(n) 1275 * 1276 * The Processing Unit and Extension Units can be in any order. Additional 1277 * Extension Units connected to the main chain as single-unit branches are 1278 * also supported. Single-input Selector Units are ignored. 1279 */ 1280 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1281 struct uvc_entity *entity) 1282 { 1283 switch (UVC_ENTITY_TYPE(entity)) { 1284 case UVC_VC_EXTENSION_UNIT: 1285 if (uvc_trace_param & UVC_TRACE_PROBE) 1286 printk(" <- XU %d", entity->id); 1287 1288 if (entity->bNrInPins != 1) { 1289 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1290 "than 1 input pin.\n", entity->id); 1291 return -1; 1292 } 1293 1294 break; 1295 1296 case UVC_VC_PROCESSING_UNIT: 1297 if (uvc_trace_param & UVC_TRACE_PROBE) 1298 printk(" <- PU %d", entity->id); 1299 1300 if (chain->processing != NULL) { 1301 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1302 "Processing Units in chain.\n"); 1303 return -1; 1304 } 1305 1306 chain->processing = entity; 1307 break; 1308 1309 case UVC_VC_SELECTOR_UNIT: 1310 if (uvc_trace_param & UVC_TRACE_PROBE) 1311 printk(" <- SU %d", entity->id); 1312 1313 /* Single-input selector units are ignored. */ 1314 if (entity->bNrInPins == 1) 1315 break; 1316 1317 if (chain->selector != NULL) { 1318 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1319 "Units in chain.\n"); 1320 return -1; 1321 } 1322 1323 chain->selector = entity; 1324 break; 1325 1326 case UVC_ITT_VENDOR_SPECIFIC: 1327 case UVC_ITT_CAMERA: 1328 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1329 if (uvc_trace_param & UVC_TRACE_PROBE) 1330 printk(" <- IT %d\n", entity->id); 1331 1332 break; 1333 1334 case UVC_OTT_VENDOR_SPECIFIC: 1335 case UVC_OTT_DISPLAY: 1336 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1337 if (uvc_trace_param & UVC_TRACE_PROBE) 1338 printk(" OT %d", entity->id); 1339 1340 break; 1341 1342 case UVC_TT_STREAMING: 1343 if (UVC_ENTITY_IS_ITERM(entity)) { 1344 if (uvc_trace_param & UVC_TRACE_PROBE) 1345 printk(" <- IT %d\n", entity->id); 1346 } else { 1347 if (uvc_trace_param & UVC_TRACE_PROBE) 1348 printk(" OT %d", entity->id); 1349 } 1350 1351 break; 1352 1353 default: 1354 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1355 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1356 return -1; 1357 } 1358 1359 list_add_tail(&entity->chain, &chain->entities); 1360 return 0; 1361 } 1362 1363 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1364 struct uvc_entity *entity, struct uvc_entity *prev) 1365 { 1366 struct uvc_entity *forward; 1367 int found; 1368 1369 /* Forward scan */ 1370 forward = NULL; 1371 found = 0; 1372 1373 while (1) { 1374 forward = uvc_entity_by_reference(chain->dev, entity->id, 1375 forward); 1376 if (forward == NULL) 1377 break; 1378 if (forward == prev) 1379 continue; 1380 1381 switch (UVC_ENTITY_TYPE(forward)) { 1382 case UVC_VC_EXTENSION_UNIT: 1383 if (forward->bNrInPins != 1) { 1384 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1385 "has more than 1 input pin.\n", 1386 entity->id); 1387 return -EINVAL; 1388 } 1389 1390 list_add_tail(&forward->chain, &chain->entities); 1391 if (uvc_trace_param & UVC_TRACE_PROBE) { 1392 if (!found) 1393 printk(" (->"); 1394 1395 printk(" XU %d", forward->id); 1396 found = 1; 1397 } 1398 break; 1399 1400 case UVC_OTT_VENDOR_SPECIFIC: 1401 case UVC_OTT_DISPLAY: 1402 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1403 case UVC_TT_STREAMING: 1404 if (UVC_ENTITY_IS_ITERM(forward)) { 1405 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1406 "terminal %u.\n", forward->id); 1407 return -EINVAL; 1408 } 1409 1410 list_add_tail(&forward->chain, &chain->entities); 1411 if (uvc_trace_param & UVC_TRACE_PROBE) { 1412 if (!found) 1413 printk(" (->"); 1414 1415 printk(" OT %d", forward->id); 1416 found = 1; 1417 } 1418 break; 1419 } 1420 } 1421 if (found) 1422 printk(")"); 1423 1424 return 0; 1425 } 1426 1427 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1428 struct uvc_entity **_entity) 1429 { 1430 struct uvc_entity *entity = *_entity; 1431 struct uvc_entity *term; 1432 int id = -EINVAL, i; 1433 1434 switch (UVC_ENTITY_TYPE(entity)) { 1435 case UVC_VC_EXTENSION_UNIT: 1436 case UVC_VC_PROCESSING_UNIT: 1437 id = entity->baSourceID[0]; 1438 break; 1439 1440 case UVC_VC_SELECTOR_UNIT: 1441 /* Single-input selector units are ignored. */ 1442 if (entity->bNrInPins == 1) { 1443 id = entity->baSourceID[0]; 1444 break; 1445 } 1446 1447 if (uvc_trace_param & UVC_TRACE_PROBE) 1448 printk(" <- IT"); 1449 1450 chain->selector = entity; 1451 for (i = 0; i < entity->bNrInPins; ++i) { 1452 id = entity->baSourceID[i]; 1453 term = uvc_entity_by_id(chain->dev, id); 1454 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1455 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1456 "input %d isn't connected to an " 1457 "input terminal\n", entity->id, i); 1458 return -1; 1459 } 1460 1461 if (uvc_trace_param & UVC_TRACE_PROBE) 1462 printk(" %d", term->id); 1463 1464 list_add_tail(&term->chain, &chain->entities); 1465 uvc_scan_chain_forward(chain, term, entity); 1466 } 1467 1468 if (uvc_trace_param & UVC_TRACE_PROBE) 1469 printk("\n"); 1470 1471 id = 0; 1472 break; 1473 1474 case UVC_ITT_VENDOR_SPECIFIC: 1475 case UVC_ITT_CAMERA: 1476 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1477 case UVC_OTT_VENDOR_SPECIFIC: 1478 case UVC_OTT_DISPLAY: 1479 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1480 case UVC_TT_STREAMING: 1481 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1482 break; 1483 } 1484 1485 if (id <= 0) { 1486 *_entity = NULL; 1487 return id; 1488 } 1489 1490 entity = uvc_entity_by_id(chain->dev, id); 1491 if (entity == NULL) { 1492 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1493 "unknown entity %d.\n", id); 1494 return -EINVAL; 1495 } 1496 1497 *_entity = entity; 1498 return 0; 1499 } 1500 1501 static int uvc_scan_chain(struct uvc_video_chain *chain, 1502 struct uvc_entity *term) 1503 { 1504 struct uvc_entity *entity, *prev; 1505 1506 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1507 1508 entity = term; 1509 prev = NULL; 1510 1511 while (entity != NULL) { 1512 /* Entity must not be part of an existing chain */ 1513 if (entity->chain.next || entity->chain.prev) { 1514 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1515 "entity %d already in chain.\n", entity->id); 1516 return -EINVAL; 1517 } 1518 1519 /* Process entity */ 1520 if (uvc_scan_chain_entity(chain, entity) < 0) 1521 return -EINVAL; 1522 1523 /* Forward scan */ 1524 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1525 return -EINVAL; 1526 1527 /* Backward scan */ 1528 prev = entity; 1529 if (uvc_scan_chain_backward(chain, &entity) < 0) 1530 return -EINVAL; 1531 } 1532 1533 return 0; 1534 } 1535 1536 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1537 char *buffer) 1538 { 1539 struct uvc_entity *term; 1540 unsigned int nterms = 0; 1541 char *p = buffer; 1542 1543 list_for_each_entry(term, terms, chain) { 1544 if (!UVC_ENTITY_IS_TERM(term) || 1545 UVC_TERM_DIRECTION(term) != dir) 1546 continue; 1547 1548 if (nterms) 1549 p += sprintf(p, ","); 1550 if (++nterms >= 4) { 1551 p += sprintf(p, "..."); 1552 break; 1553 } 1554 p += sprintf(p, "%u", term->id); 1555 } 1556 1557 return p - buffer; 1558 } 1559 1560 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1561 { 1562 static char buffer[43]; 1563 char *p = buffer; 1564 1565 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1566 p += sprintf(p, " -> "); 1567 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1568 1569 return buffer; 1570 } 1571 1572 /* 1573 * Scan the device for video chains and register video devices. 1574 * 1575 * Chains are scanned starting at their output terminals and walked backwards. 1576 */ 1577 static int uvc_scan_device(struct uvc_device *dev) 1578 { 1579 struct uvc_video_chain *chain; 1580 struct uvc_entity *term; 1581 1582 list_for_each_entry(term, &dev->entities, list) { 1583 if (!UVC_ENTITY_IS_OTERM(term)) 1584 continue; 1585 1586 /* If the terminal is already included in a chain, skip it. 1587 * This can happen for chains that have multiple output 1588 * terminals, where all output terminals beside the first one 1589 * will be inserted in the chain in forward scans. 1590 */ 1591 if (term->chain.next || term->chain.prev) 1592 continue; 1593 1594 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1595 if (chain == NULL) 1596 return -ENOMEM; 1597 1598 INIT_LIST_HEAD(&chain->entities); 1599 mutex_init(&chain->ctrl_mutex); 1600 chain->dev = dev; 1601 v4l2_prio_init(&chain->prio); 1602 1603 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1604 1605 if (uvc_scan_chain(chain, term) < 0) { 1606 kfree(chain); 1607 continue; 1608 } 1609 1610 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1611 uvc_print_chain(chain)); 1612 1613 list_add_tail(&chain->list, &dev->chains); 1614 } 1615 1616 if (list_empty(&dev->chains)) { 1617 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1618 return -1; 1619 } 1620 1621 return 0; 1622 } 1623 1624 /* ------------------------------------------------------------------------ 1625 * Video device registration and unregistration 1626 */ 1627 1628 /* 1629 * Delete the UVC device. 1630 * 1631 * Called by the kernel when the last reference to the uvc_device structure 1632 * is released. 1633 * 1634 * As this function is called after or during disconnect(), all URBs have 1635 * already been canceled by the USB core. There is no need to kill the 1636 * interrupt URB manually. 1637 */ 1638 static void uvc_delete(struct uvc_device *dev) 1639 { 1640 struct list_head *p, *n; 1641 1642 uvc_status_cleanup(dev); 1643 uvc_ctrl_cleanup_device(dev); 1644 1645 usb_put_intf(dev->intf); 1646 usb_put_dev(dev->udev); 1647 1648 if (dev->vdev.dev) 1649 v4l2_device_unregister(&dev->vdev); 1650 #ifdef CONFIG_MEDIA_CONTROLLER 1651 if (media_devnode_is_registered(&dev->mdev.devnode)) 1652 media_device_unregister(&dev->mdev); 1653 #endif 1654 1655 list_for_each_safe(p, n, &dev->chains) { 1656 struct uvc_video_chain *chain; 1657 chain = list_entry(p, struct uvc_video_chain, list); 1658 kfree(chain); 1659 } 1660 1661 list_for_each_safe(p, n, &dev->entities) { 1662 struct uvc_entity *entity; 1663 entity = list_entry(p, struct uvc_entity, list); 1664 #ifdef CONFIG_MEDIA_CONTROLLER 1665 uvc_mc_cleanup_entity(entity); 1666 #endif 1667 if (entity->vdev) { 1668 video_device_release(entity->vdev); 1669 entity->vdev = NULL; 1670 } 1671 kfree(entity); 1672 } 1673 1674 list_for_each_safe(p, n, &dev->streams) { 1675 struct uvc_streaming *streaming; 1676 streaming = list_entry(p, struct uvc_streaming, list); 1677 usb_driver_release_interface(&uvc_driver.driver, 1678 streaming->intf); 1679 usb_put_intf(streaming->intf); 1680 kfree(streaming->format); 1681 kfree(streaming->header.bmaControls); 1682 kfree(streaming); 1683 } 1684 1685 kfree(dev); 1686 } 1687 1688 static void uvc_release(struct video_device *vdev) 1689 { 1690 struct uvc_streaming *stream = video_get_drvdata(vdev); 1691 struct uvc_device *dev = stream->dev; 1692 1693 /* Decrement the registered streams count and delete the device when it 1694 * reaches zero. 1695 */ 1696 if (atomic_dec_and_test(&dev->nstreams)) 1697 uvc_delete(dev); 1698 } 1699 1700 /* 1701 * Unregister the video devices. 1702 */ 1703 static void uvc_unregister_video(struct uvc_device *dev) 1704 { 1705 struct uvc_streaming *stream; 1706 1707 /* Unregistering all video devices might result in uvc_delete() being 1708 * called from inside the loop if there's no open file handle. To avoid 1709 * that, increment the stream count before iterating over the streams 1710 * and decrement it when done. 1711 */ 1712 atomic_inc(&dev->nstreams); 1713 1714 list_for_each_entry(stream, &dev->streams, list) { 1715 if (stream->vdev == NULL) 1716 continue; 1717 1718 video_unregister_device(stream->vdev); 1719 stream->vdev = NULL; 1720 1721 uvc_debugfs_cleanup_stream(stream); 1722 } 1723 1724 /* Decrement the stream count and call uvc_delete explicitly if there 1725 * are no stream left. 1726 */ 1727 if (atomic_dec_and_test(&dev->nstreams)) 1728 uvc_delete(dev); 1729 } 1730 1731 static int uvc_register_video(struct uvc_device *dev, 1732 struct uvc_streaming *stream) 1733 { 1734 struct video_device *vdev; 1735 int ret; 1736 1737 /* Initialize the video buffers queue. */ 1738 ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param); 1739 if (ret) 1740 return ret; 1741 1742 /* Initialize the streaming interface with default streaming 1743 * parameters. 1744 */ 1745 ret = uvc_video_init(stream); 1746 if (ret < 0) { 1747 uvc_printk(KERN_ERR, "Failed to initialize the device " 1748 "(%d).\n", ret); 1749 return ret; 1750 } 1751 1752 uvc_debugfs_init_stream(stream); 1753 1754 /* Register the device with V4L. */ 1755 vdev = video_device_alloc(); 1756 if (vdev == NULL) { 1757 uvc_printk(KERN_ERR, "Failed to allocate video device (%d).\n", 1758 ret); 1759 return -ENOMEM; 1760 } 1761 1762 /* We already hold a reference to dev->udev. The video device will be 1763 * unregistered before the reference is released, so we don't need to 1764 * get another one. 1765 */ 1766 vdev->v4l2_dev = &dev->vdev; 1767 vdev->fops = &uvc_fops; 1768 vdev->ioctl_ops = &uvc_ioctl_ops; 1769 vdev->release = uvc_release; 1770 vdev->prio = &stream->chain->prio; 1771 if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1772 vdev->vfl_dir = VFL_DIR_TX; 1773 strlcpy(vdev->name, dev->name, sizeof vdev->name); 1774 1775 /* Set the driver data before calling video_register_device, otherwise 1776 * uvc_v4l2_open might race us. 1777 */ 1778 stream->vdev = vdev; 1779 video_set_drvdata(vdev, stream); 1780 1781 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1782 if (ret < 0) { 1783 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", 1784 ret); 1785 stream->vdev = NULL; 1786 video_device_release(vdev); 1787 return ret; 1788 } 1789 1790 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1791 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE; 1792 else 1793 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 1794 1795 atomic_inc(&dev->nstreams); 1796 return 0; 1797 } 1798 1799 /* 1800 * Register all video devices in all chains. 1801 */ 1802 static int uvc_register_terms(struct uvc_device *dev, 1803 struct uvc_video_chain *chain) 1804 { 1805 struct uvc_streaming *stream; 1806 struct uvc_entity *term; 1807 int ret; 1808 1809 list_for_each_entry(term, &chain->entities, chain) { 1810 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 1811 continue; 1812 1813 stream = uvc_stream_by_id(dev, term->id); 1814 if (stream == NULL) { 1815 uvc_printk(KERN_INFO, "No streaming interface found " 1816 "for terminal %u.", term->id); 1817 continue; 1818 } 1819 1820 stream->chain = chain; 1821 ret = uvc_register_video(dev, stream); 1822 if (ret < 0) 1823 return ret; 1824 1825 term->vdev = stream->vdev; 1826 } 1827 1828 return 0; 1829 } 1830 1831 static int uvc_register_chains(struct uvc_device *dev) 1832 { 1833 struct uvc_video_chain *chain; 1834 int ret; 1835 1836 list_for_each_entry(chain, &dev->chains, list) { 1837 ret = uvc_register_terms(dev, chain); 1838 if (ret < 0) 1839 return ret; 1840 1841 #ifdef CONFIG_MEDIA_CONTROLLER 1842 ret = uvc_mc_register_entities(chain); 1843 if (ret < 0) { 1844 uvc_printk(KERN_INFO, "Failed to register entites " 1845 "(%d).\n", ret); 1846 } 1847 #endif 1848 } 1849 1850 return 0; 1851 } 1852 1853 /* ------------------------------------------------------------------------ 1854 * USB probe, disconnect, suspend and resume 1855 */ 1856 1857 static int uvc_probe(struct usb_interface *intf, 1858 const struct usb_device_id *id) 1859 { 1860 struct usb_device *udev = interface_to_usbdev(intf); 1861 struct uvc_device *dev; 1862 int ret; 1863 1864 if (id->idVendor && id->idProduct) 1865 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 1866 "(%04x:%04x)\n", udev->devpath, id->idVendor, 1867 id->idProduct); 1868 else 1869 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 1870 udev->devpath); 1871 1872 /* Allocate memory for the device and initialize it. */ 1873 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL) 1874 return -ENOMEM; 1875 1876 INIT_LIST_HEAD(&dev->entities); 1877 INIT_LIST_HEAD(&dev->chains); 1878 INIT_LIST_HEAD(&dev->streams); 1879 atomic_set(&dev->nstreams, 0); 1880 atomic_set(&dev->nmappings, 0); 1881 mutex_init(&dev->lock); 1882 1883 dev->udev = usb_get_dev(udev); 1884 dev->intf = usb_get_intf(intf); 1885 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 1886 dev->quirks = (uvc_quirks_param == -1) 1887 ? id->driver_info : uvc_quirks_param; 1888 1889 if (udev->product != NULL) 1890 strlcpy(dev->name, udev->product, sizeof dev->name); 1891 else 1892 snprintf(dev->name, sizeof dev->name, 1893 "UVC Camera (%04x:%04x)", 1894 le16_to_cpu(udev->descriptor.idVendor), 1895 le16_to_cpu(udev->descriptor.idProduct)); 1896 1897 /* Parse the Video Class control descriptor. */ 1898 if (uvc_parse_control(dev) < 0) { 1899 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 1900 "descriptors.\n"); 1901 goto error; 1902 } 1903 1904 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 1905 dev->uvc_version >> 8, dev->uvc_version & 0xff, 1906 udev->product ? udev->product : "<unnamed>", 1907 le16_to_cpu(udev->descriptor.idVendor), 1908 le16_to_cpu(udev->descriptor.idProduct)); 1909 1910 if (dev->quirks != id->driver_info) { 1911 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 1912 "parameter for testing purpose.\n", dev->quirks); 1913 uvc_printk(KERN_INFO, "Please report required quirks to the " 1914 "linux-uvc-devel mailing list.\n"); 1915 } 1916 1917 /* Register the media and V4L2 devices. */ 1918 #ifdef CONFIG_MEDIA_CONTROLLER 1919 dev->mdev.dev = &intf->dev; 1920 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 1921 if (udev->serial) 1922 strlcpy(dev->mdev.serial, udev->serial, 1923 sizeof(dev->mdev.serial)); 1924 strcpy(dev->mdev.bus_info, udev->devpath); 1925 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 1926 dev->mdev.driver_version = LINUX_VERSION_CODE; 1927 if (media_device_register(&dev->mdev) < 0) 1928 goto error; 1929 1930 dev->vdev.mdev = &dev->mdev; 1931 #endif 1932 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 1933 goto error; 1934 1935 /* Initialize controls. */ 1936 if (uvc_ctrl_init_device(dev) < 0) 1937 goto error; 1938 1939 /* Scan the device for video chains. */ 1940 if (uvc_scan_device(dev) < 0) 1941 goto error; 1942 1943 /* Register video device nodes. */ 1944 if (uvc_register_chains(dev) < 0) 1945 goto error; 1946 1947 /* Save our data pointer in the interface data. */ 1948 usb_set_intfdata(intf, dev); 1949 1950 /* Initialize the interrupt URB. */ 1951 if ((ret = uvc_status_init(dev)) < 0) { 1952 uvc_printk(KERN_INFO, "Unable to initialize the status " 1953 "endpoint (%d), status interrupt will not be " 1954 "supported.\n", ret); 1955 } 1956 1957 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 1958 usb_enable_autosuspend(udev); 1959 return 0; 1960 1961 error: 1962 uvc_unregister_video(dev); 1963 return -ENODEV; 1964 } 1965 1966 static void uvc_disconnect(struct usb_interface *intf) 1967 { 1968 struct uvc_device *dev = usb_get_intfdata(intf); 1969 1970 /* Set the USB interface data to NULL. This can be done outside the 1971 * lock, as there's no other reader. 1972 */ 1973 usb_set_intfdata(intf, NULL); 1974 1975 if (intf->cur_altsetting->desc.bInterfaceSubClass == 1976 UVC_SC_VIDEOSTREAMING) 1977 return; 1978 1979 dev->state |= UVC_DEV_DISCONNECTED; 1980 1981 uvc_unregister_video(dev); 1982 } 1983 1984 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 1985 { 1986 struct uvc_device *dev = usb_get_intfdata(intf); 1987 struct uvc_streaming *stream; 1988 1989 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 1990 intf->cur_altsetting->desc.bInterfaceNumber); 1991 1992 /* Controls are cached on the fly so they don't need to be saved. */ 1993 if (intf->cur_altsetting->desc.bInterfaceSubClass == 1994 UVC_SC_VIDEOCONTROL) { 1995 mutex_lock(&dev->lock); 1996 if (dev->users) 1997 uvc_status_stop(dev); 1998 mutex_unlock(&dev->lock); 1999 return 0; 2000 } 2001 2002 list_for_each_entry(stream, &dev->streams, list) { 2003 if (stream->intf == intf) 2004 return uvc_video_suspend(stream); 2005 } 2006 2007 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2008 "mismatch.\n"); 2009 return -EINVAL; 2010 } 2011 2012 static int __uvc_resume(struct usb_interface *intf, int reset) 2013 { 2014 struct uvc_device *dev = usb_get_intfdata(intf); 2015 struct uvc_streaming *stream; 2016 int ret = 0; 2017 2018 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2019 intf->cur_altsetting->desc.bInterfaceNumber); 2020 2021 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2022 UVC_SC_VIDEOCONTROL) { 2023 if (reset) { 2024 ret = uvc_ctrl_restore_values(dev); 2025 if (ret < 0) 2026 return ret; 2027 } 2028 2029 mutex_lock(&dev->lock); 2030 if (dev->users) 2031 ret = uvc_status_start(dev, GFP_NOIO); 2032 mutex_unlock(&dev->lock); 2033 2034 return ret; 2035 } 2036 2037 list_for_each_entry(stream, &dev->streams, list) { 2038 if (stream->intf == intf) { 2039 ret = uvc_video_resume(stream, reset); 2040 if (ret < 0) 2041 uvc_queue_streamoff(&stream->queue, 2042 stream->queue.queue.type); 2043 return ret; 2044 } 2045 } 2046 2047 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2048 "mismatch.\n"); 2049 return -EINVAL; 2050 } 2051 2052 static int uvc_resume(struct usb_interface *intf) 2053 { 2054 return __uvc_resume(intf, 0); 2055 } 2056 2057 static int uvc_reset_resume(struct usb_interface *intf) 2058 { 2059 return __uvc_resume(intf, 1); 2060 } 2061 2062 /* ------------------------------------------------------------------------ 2063 * Module parameters 2064 */ 2065 2066 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp) 2067 { 2068 if (uvc_clock_param == CLOCK_MONOTONIC) 2069 return sprintf(buffer, "CLOCK_MONOTONIC"); 2070 else 2071 return sprintf(buffer, "CLOCK_REALTIME"); 2072 } 2073 2074 static int uvc_clock_param_set(const char *val, struct kernel_param *kp) 2075 { 2076 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2077 val += strlen("clock_"); 2078 2079 if (strcasecmp(val, "monotonic") == 0) 2080 uvc_clock_param = CLOCK_MONOTONIC; 2081 else if (strcasecmp(val, "realtime") == 0) 2082 uvc_clock_param = CLOCK_REALTIME; 2083 else 2084 return -EINVAL; 2085 2086 return 0; 2087 } 2088 2089 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2090 &uvc_clock_param, S_IRUGO|S_IWUSR); 2091 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2092 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2093 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2094 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2095 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2096 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2097 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2098 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2099 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2100 2101 /* ------------------------------------------------------------------------ 2102 * Driver initialization and cleanup 2103 */ 2104 2105 /* 2106 * The Logitech cameras listed below have their interface class set to 2107 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2108 * though they are compliant. 2109 */ 2110 static struct usb_device_id uvc_ids[] = { 2111 /* LogiLink Wireless Webcam */ 2112 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2113 | USB_DEVICE_ID_MATCH_INT_INFO, 2114 .idVendor = 0x0416, 2115 .idProduct = 0xa91a, 2116 .bInterfaceClass = USB_CLASS_VIDEO, 2117 .bInterfaceSubClass = 1, 2118 .bInterfaceProtocol = 0, 2119 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2120 /* Genius eFace 2025 */ 2121 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2122 | USB_DEVICE_ID_MATCH_INT_INFO, 2123 .idVendor = 0x0458, 2124 .idProduct = 0x706e, 2125 .bInterfaceClass = USB_CLASS_VIDEO, 2126 .bInterfaceSubClass = 1, 2127 .bInterfaceProtocol = 0, 2128 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2129 /* Microsoft Lifecam NX-6000 */ 2130 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2131 | USB_DEVICE_ID_MATCH_INT_INFO, 2132 .idVendor = 0x045e, 2133 .idProduct = 0x00f8, 2134 .bInterfaceClass = USB_CLASS_VIDEO, 2135 .bInterfaceSubClass = 1, 2136 .bInterfaceProtocol = 0, 2137 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2138 /* Microsoft Lifecam NX-3000 */ 2139 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2140 | USB_DEVICE_ID_MATCH_INT_INFO, 2141 .idVendor = 0x045e, 2142 .idProduct = 0x0721, 2143 .bInterfaceClass = USB_CLASS_VIDEO, 2144 .bInterfaceSubClass = 1, 2145 .bInterfaceProtocol = 0, 2146 .driver_info = UVC_QUIRK_PROBE_DEF }, 2147 /* Microsoft Lifecam VX-7000 */ 2148 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2149 | USB_DEVICE_ID_MATCH_INT_INFO, 2150 .idVendor = 0x045e, 2151 .idProduct = 0x0723, 2152 .bInterfaceClass = USB_CLASS_VIDEO, 2153 .bInterfaceSubClass = 1, 2154 .bInterfaceProtocol = 0, 2155 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2156 /* Logitech Quickcam Fusion */ 2157 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2158 | USB_DEVICE_ID_MATCH_INT_INFO, 2159 .idVendor = 0x046d, 2160 .idProduct = 0x08c1, 2161 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2162 .bInterfaceSubClass = 1, 2163 .bInterfaceProtocol = 0 }, 2164 /* Logitech Quickcam Orbit MP */ 2165 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2166 | USB_DEVICE_ID_MATCH_INT_INFO, 2167 .idVendor = 0x046d, 2168 .idProduct = 0x08c2, 2169 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2170 .bInterfaceSubClass = 1, 2171 .bInterfaceProtocol = 0 }, 2172 /* Logitech Quickcam Pro for Notebook */ 2173 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2174 | USB_DEVICE_ID_MATCH_INT_INFO, 2175 .idVendor = 0x046d, 2176 .idProduct = 0x08c3, 2177 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2178 .bInterfaceSubClass = 1, 2179 .bInterfaceProtocol = 0 }, 2180 /* Logitech Quickcam Pro 5000 */ 2181 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2182 | USB_DEVICE_ID_MATCH_INT_INFO, 2183 .idVendor = 0x046d, 2184 .idProduct = 0x08c5, 2185 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2186 .bInterfaceSubClass = 1, 2187 .bInterfaceProtocol = 0 }, 2188 /* Logitech Quickcam OEM Dell Notebook */ 2189 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2190 | USB_DEVICE_ID_MATCH_INT_INFO, 2191 .idVendor = 0x046d, 2192 .idProduct = 0x08c6, 2193 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2194 .bInterfaceSubClass = 1, 2195 .bInterfaceProtocol = 0 }, 2196 /* Logitech Quickcam OEM Cisco VT Camera II */ 2197 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2198 | USB_DEVICE_ID_MATCH_INT_INFO, 2199 .idVendor = 0x046d, 2200 .idProduct = 0x08c7, 2201 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2202 .bInterfaceSubClass = 1, 2203 .bInterfaceProtocol = 0 }, 2204 /* Logitech HD Pro Webcam C920 */ 2205 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2206 | USB_DEVICE_ID_MATCH_INT_INFO, 2207 .idVendor = 0x046d, 2208 .idProduct = 0x082d, 2209 .bInterfaceClass = USB_CLASS_VIDEO, 2210 .bInterfaceSubClass = 1, 2211 .bInterfaceProtocol = 0, 2212 .driver_info = UVC_QUIRK_RESTORE_CTRLS_ON_INIT }, 2213 /* Chicony CNF7129 (Asus EEE 100HE) */ 2214 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2215 | USB_DEVICE_ID_MATCH_INT_INFO, 2216 .idVendor = 0x04f2, 2217 .idProduct = 0xb071, 2218 .bInterfaceClass = USB_CLASS_VIDEO, 2219 .bInterfaceSubClass = 1, 2220 .bInterfaceProtocol = 0, 2221 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE }, 2222 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2223 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2224 | USB_DEVICE_ID_MATCH_INT_INFO, 2225 .idVendor = 0x058f, 2226 .idProduct = 0x3820, 2227 .bInterfaceClass = USB_CLASS_VIDEO, 2228 .bInterfaceSubClass = 1, 2229 .bInterfaceProtocol = 0, 2230 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2231 /* Dell XPS m1530 */ 2232 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2233 | USB_DEVICE_ID_MATCH_INT_INFO, 2234 .idVendor = 0x05a9, 2235 .idProduct = 0x2640, 2236 .bInterfaceClass = USB_CLASS_VIDEO, 2237 .bInterfaceSubClass = 1, 2238 .bInterfaceProtocol = 0, 2239 .driver_info = UVC_QUIRK_PROBE_DEF }, 2240 /* Dell SP2008WFP Monitor */ 2241 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2242 | USB_DEVICE_ID_MATCH_INT_INFO, 2243 .idVendor = 0x05a9, 2244 .idProduct = 0x2641, 2245 .bInterfaceClass = USB_CLASS_VIDEO, 2246 .bInterfaceSubClass = 1, 2247 .bInterfaceProtocol = 0, 2248 .driver_info = UVC_QUIRK_PROBE_DEF }, 2249 /* Dell Alienware X51 */ 2250 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2251 | USB_DEVICE_ID_MATCH_INT_INFO, 2252 .idVendor = 0x05a9, 2253 .idProduct = 0x2643, 2254 .bInterfaceClass = USB_CLASS_VIDEO, 2255 .bInterfaceSubClass = 1, 2256 .bInterfaceProtocol = 0, 2257 .driver_info = UVC_QUIRK_PROBE_DEF }, 2258 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2259 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2260 | USB_DEVICE_ID_MATCH_INT_INFO, 2261 .idVendor = 0x05a9, 2262 .idProduct = 0x264a, 2263 .bInterfaceClass = USB_CLASS_VIDEO, 2264 .bInterfaceSubClass = 1, 2265 .bInterfaceProtocol = 0, 2266 .driver_info = UVC_QUIRK_PROBE_DEF }, 2267 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2268 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2269 | USB_DEVICE_ID_MATCH_INT_INFO, 2270 .idVendor = 0x05a9, 2271 .idProduct = 0x7670, 2272 .bInterfaceClass = USB_CLASS_VIDEO, 2273 .bInterfaceSubClass = 1, 2274 .bInterfaceProtocol = 0, 2275 .driver_info = UVC_QUIRK_PROBE_DEF }, 2276 /* Apple Built-In iSight */ 2277 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2278 | USB_DEVICE_ID_MATCH_INT_INFO, 2279 .idVendor = 0x05ac, 2280 .idProduct = 0x8501, 2281 .bInterfaceClass = USB_CLASS_VIDEO, 2282 .bInterfaceSubClass = 1, 2283 .bInterfaceProtocol = 0, 2284 .driver_info = UVC_QUIRK_PROBE_MINMAX 2285 | UVC_QUIRK_BUILTIN_ISIGHT }, 2286 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2287 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2288 | USB_DEVICE_ID_MATCH_INT_INFO, 2289 .idVendor = 0x05c8, 2290 .idProduct = 0x0403, 2291 .bInterfaceClass = USB_CLASS_VIDEO, 2292 .bInterfaceSubClass = 1, 2293 .bInterfaceProtocol = 0, 2294 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2295 /* Genesys Logic USB 2.0 PC Camera */ 2296 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2297 | USB_DEVICE_ID_MATCH_INT_INFO, 2298 .idVendor = 0x05e3, 2299 .idProduct = 0x0505, 2300 .bInterfaceClass = USB_CLASS_VIDEO, 2301 .bInterfaceSubClass = 1, 2302 .bInterfaceProtocol = 0, 2303 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2304 /* Hercules Classic Silver */ 2305 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2306 | USB_DEVICE_ID_MATCH_INT_INFO, 2307 .idVendor = 0x06f8, 2308 .idProduct = 0x300c, 2309 .bInterfaceClass = USB_CLASS_VIDEO, 2310 .bInterfaceSubClass = 1, 2311 .bInterfaceProtocol = 0, 2312 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2313 /* ViMicro Vega */ 2314 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2315 | USB_DEVICE_ID_MATCH_INT_INFO, 2316 .idVendor = 0x0ac8, 2317 .idProduct = 0x332d, 2318 .bInterfaceClass = USB_CLASS_VIDEO, 2319 .bInterfaceSubClass = 1, 2320 .bInterfaceProtocol = 0, 2321 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2322 /* ViMicro - Minoru3D */ 2323 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2324 | USB_DEVICE_ID_MATCH_INT_INFO, 2325 .idVendor = 0x0ac8, 2326 .idProduct = 0x3410, 2327 .bInterfaceClass = USB_CLASS_VIDEO, 2328 .bInterfaceSubClass = 1, 2329 .bInterfaceProtocol = 0, 2330 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2331 /* ViMicro Venus - Minoru3D */ 2332 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2333 | USB_DEVICE_ID_MATCH_INT_INFO, 2334 .idVendor = 0x0ac8, 2335 .idProduct = 0x3420, 2336 .bInterfaceClass = USB_CLASS_VIDEO, 2337 .bInterfaceSubClass = 1, 2338 .bInterfaceProtocol = 0, 2339 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2340 /* Ophir Optronics - SPCAM 620U */ 2341 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2342 | USB_DEVICE_ID_MATCH_INT_INFO, 2343 .idVendor = 0x0bd3, 2344 .idProduct = 0x0555, 2345 .bInterfaceClass = USB_CLASS_VIDEO, 2346 .bInterfaceSubClass = 1, 2347 .bInterfaceProtocol = 0, 2348 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2349 /* MT6227 */ 2350 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2351 | USB_DEVICE_ID_MATCH_INT_INFO, 2352 .idVendor = 0x0e8d, 2353 .idProduct = 0x0004, 2354 .bInterfaceClass = USB_CLASS_VIDEO, 2355 .bInterfaceSubClass = 1, 2356 .bInterfaceProtocol = 0, 2357 .driver_info = UVC_QUIRK_PROBE_MINMAX 2358 | UVC_QUIRK_PROBE_DEF }, 2359 /* IMC Networks (Medion Akoya) */ 2360 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2361 | USB_DEVICE_ID_MATCH_INT_INFO, 2362 .idVendor = 0x13d3, 2363 .idProduct = 0x5103, 2364 .bInterfaceClass = USB_CLASS_VIDEO, 2365 .bInterfaceSubClass = 1, 2366 .bInterfaceProtocol = 0, 2367 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2368 /* JMicron USB2.0 XGA WebCam */ 2369 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2370 | USB_DEVICE_ID_MATCH_INT_INFO, 2371 .idVendor = 0x152d, 2372 .idProduct = 0x0310, 2373 .bInterfaceClass = USB_CLASS_VIDEO, 2374 .bInterfaceSubClass = 1, 2375 .bInterfaceProtocol = 0, 2376 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2377 /* Syntek (HP Spartan) */ 2378 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2379 | USB_DEVICE_ID_MATCH_INT_INFO, 2380 .idVendor = 0x174f, 2381 .idProduct = 0x5212, 2382 .bInterfaceClass = USB_CLASS_VIDEO, 2383 .bInterfaceSubClass = 1, 2384 .bInterfaceProtocol = 0, 2385 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2386 /* Syntek (Samsung Q310) */ 2387 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2388 | USB_DEVICE_ID_MATCH_INT_INFO, 2389 .idVendor = 0x174f, 2390 .idProduct = 0x5931, 2391 .bInterfaceClass = USB_CLASS_VIDEO, 2392 .bInterfaceSubClass = 1, 2393 .bInterfaceProtocol = 0, 2394 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2395 /* Syntek (Packard Bell EasyNote MX52 */ 2396 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2397 | USB_DEVICE_ID_MATCH_INT_INFO, 2398 .idVendor = 0x174f, 2399 .idProduct = 0x8a12, 2400 .bInterfaceClass = USB_CLASS_VIDEO, 2401 .bInterfaceSubClass = 1, 2402 .bInterfaceProtocol = 0, 2403 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2404 /* Syntek (Asus F9SG) */ 2405 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2406 | USB_DEVICE_ID_MATCH_INT_INFO, 2407 .idVendor = 0x174f, 2408 .idProduct = 0x8a31, 2409 .bInterfaceClass = USB_CLASS_VIDEO, 2410 .bInterfaceSubClass = 1, 2411 .bInterfaceProtocol = 0, 2412 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2413 /* Syntek (Asus U3S) */ 2414 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2415 | USB_DEVICE_ID_MATCH_INT_INFO, 2416 .idVendor = 0x174f, 2417 .idProduct = 0x8a33, 2418 .bInterfaceClass = USB_CLASS_VIDEO, 2419 .bInterfaceSubClass = 1, 2420 .bInterfaceProtocol = 0, 2421 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2422 /* Syntek (JAOtech Smart Terminal) */ 2423 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2424 | USB_DEVICE_ID_MATCH_INT_INFO, 2425 .idVendor = 0x174f, 2426 .idProduct = 0x8a34, 2427 .bInterfaceClass = USB_CLASS_VIDEO, 2428 .bInterfaceSubClass = 1, 2429 .bInterfaceProtocol = 0, 2430 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2431 /* Miricle 307K */ 2432 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2433 | USB_DEVICE_ID_MATCH_INT_INFO, 2434 .idVendor = 0x17dc, 2435 .idProduct = 0x0202, 2436 .bInterfaceClass = USB_CLASS_VIDEO, 2437 .bInterfaceSubClass = 1, 2438 .bInterfaceProtocol = 0, 2439 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2440 /* Lenovo Thinkpad SL400/SL500 */ 2441 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2442 | USB_DEVICE_ID_MATCH_INT_INFO, 2443 .idVendor = 0x17ef, 2444 .idProduct = 0x480b, 2445 .bInterfaceClass = USB_CLASS_VIDEO, 2446 .bInterfaceSubClass = 1, 2447 .bInterfaceProtocol = 0, 2448 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2449 /* Aveo Technology USB 2.0 Camera */ 2450 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2451 | USB_DEVICE_ID_MATCH_INT_INFO, 2452 .idVendor = 0x1871, 2453 .idProduct = 0x0306, 2454 .bInterfaceClass = USB_CLASS_VIDEO, 2455 .bInterfaceSubClass = 1, 2456 .bInterfaceProtocol = 0, 2457 .driver_info = UVC_QUIRK_PROBE_MINMAX 2458 | UVC_QUIRK_PROBE_EXTRAFIELDS }, 2459 /* Ecamm Pico iMage */ 2460 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2461 | USB_DEVICE_ID_MATCH_INT_INFO, 2462 .idVendor = 0x18cd, 2463 .idProduct = 0xcafe, 2464 .bInterfaceClass = USB_CLASS_VIDEO, 2465 .bInterfaceSubClass = 1, 2466 .bInterfaceProtocol = 0, 2467 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS }, 2468 /* Manta MM-353 Plako */ 2469 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2470 | USB_DEVICE_ID_MATCH_INT_INFO, 2471 .idVendor = 0x18ec, 2472 .idProduct = 0x3188, 2473 .bInterfaceClass = USB_CLASS_VIDEO, 2474 .bInterfaceSubClass = 1, 2475 .bInterfaceProtocol = 0, 2476 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2477 /* FSC WebCam V30S */ 2478 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2479 | USB_DEVICE_ID_MATCH_INT_INFO, 2480 .idVendor = 0x18ec, 2481 .idProduct = 0x3288, 2482 .bInterfaceClass = USB_CLASS_VIDEO, 2483 .bInterfaceSubClass = 1, 2484 .bInterfaceProtocol = 0, 2485 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2486 /* Arkmicro unbranded */ 2487 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2488 | USB_DEVICE_ID_MATCH_INT_INFO, 2489 .idVendor = 0x18ec, 2490 .idProduct = 0x3290, 2491 .bInterfaceClass = USB_CLASS_VIDEO, 2492 .bInterfaceSubClass = 1, 2493 .bInterfaceProtocol = 0, 2494 .driver_info = UVC_QUIRK_PROBE_DEF }, 2495 /* The Imaging Source USB CCD cameras */ 2496 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2497 | USB_DEVICE_ID_MATCH_INT_INFO, 2498 .idVendor = 0x199e, 2499 .idProduct = 0x8102, 2500 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2501 .bInterfaceSubClass = 1, 2502 .bInterfaceProtocol = 0 }, 2503 /* Bodelin ProScopeHR */ 2504 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2505 | USB_DEVICE_ID_MATCH_DEV_HI 2506 | USB_DEVICE_ID_MATCH_INT_INFO, 2507 .idVendor = 0x19ab, 2508 .idProduct = 0x1000, 2509 .bcdDevice_hi = 0x0126, 2510 .bInterfaceClass = USB_CLASS_VIDEO, 2511 .bInterfaceSubClass = 1, 2512 .bInterfaceProtocol = 0, 2513 .driver_info = UVC_QUIRK_STATUS_INTERVAL }, 2514 /* MSI StarCam 370i */ 2515 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2516 | USB_DEVICE_ID_MATCH_INT_INFO, 2517 .idVendor = 0x1b3b, 2518 .idProduct = 0x2951, 2519 .bInterfaceClass = USB_CLASS_VIDEO, 2520 .bInterfaceSubClass = 1, 2521 .bInterfaceProtocol = 0, 2522 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2523 /* SiGma Micro USB Web Camera */ 2524 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2525 | USB_DEVICE_ID_MATCH_INT_INFO, 2526 .idVendor = 0x1c4f, 2527 .idProduct = 0x3000, 2528 .bInterfaceClass = USB_CLASS_VIDEO, 2529 .bInterfaceSubClass = 1, 2530 .bInterfaceProtocol = 0, 2531 .driver_info = UVC_QUIRK_PROBE_MINMAX 2532 | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, 2533 /* Oculus VR Positional Tracker DK2 */ 2534 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2535 | USB_DEVICE_ID_MATCH_INT_INFO, 2536 .idVendor = 0x2833, 2537 .idProduct = 0x0201, 2538 .bInterfaceClass = USB_CLASS_VIDEO, 2539 .bInterfaceSubClass = 1, 2540 .bInterfaceProtocol = 0, 2541 .driver_info = UVC_QUIRK_FORCE_Y8 }, 2542 /* Generic USB Video Class */ 2543 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, 2544 {} 2545 }; 2546 2547 MODULE_DEVICE_TABLE(usb, uvc_ids); 2548 2549 struct uvc_driver uvc_driver = { 2550 .driver = { 2551 .name = "uvcvideo", 2552 .probe = uvc_probe, 2553 .disconnect = uvc_disconnect, 2554 .suspend = uvc_suspend, 2555 .resume = uvc_resume, 2556 .reset_resume = uvc_reset_resume, 2557 .id_table = uvc_ids, 2558 .supports_autosuspend = 1, 2559 }, 2560 }; 2561 2562 static int __init uvc_init(void) 2563 { 2564 int ret; 2565 2566 uvc_debugfs_init(); 2567 2568 ret = usb_register(&uvc_driver.driver); 2569 if (ret < 0) { 2570 uvc_debugfs_cleanup(); 2571 return ret; 2572 } 2573 2574 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2575 return 0; 2576 } 2577 2578 static void __exit uvc_cleanup(void) 2579 { 2580 usb_deregister(&uvc_driver.driver); 2581 uvc_debugfs_cleanup(); 2582 } 2583 2584 module_init(uvc_init); 2585 module_exit(uvc_cleanup); 2586 2587 MODULE_AUTHOR(DRIVER_AUTHOR); 2588 MODULE_DESCRIPTION(DRIVER_DESC); 2589 MODULE_LICENSE("GPL"); 2590 MODULE_VERSION(DRIVER_VERSION); 2591 2592