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_hw_timestamps_param; 36 unsigned int uvc_no_drop_param; 37 static unsigned int uvc_quirks_param = -1; 38 unsigned int uvc_trace_param; 39 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 40 41 /* ------------------------------------------------------------------------ 42 * Video formats 43 */ 44 45 static struct uvc_format_desc uvc_fmts[] = { 46 { 47 .name = "YUV 4:2:2 (YUYV)", 48 .guid = UVC_GUID_FORMAT_YUY2, 49 .fcc = V4L2_PIX_FMT_YUYV, 50 }, 51 { 52 .name = "YUV 4:2:2 (YUYV)", 53 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 54 .fcc = V4L2_PIX_FMT_YUYV, 55 }, 56 { 57 .name = "YUV 4:2:0 (NV12)", 58 .guid = UVC_GUID_FORMAT_NV12, 59 .fcc = V4L2_PIX_FMT_NV12, 60 }, 61 { 62 .name = "MJPEG", 63 .guid = UVC_GUID_FORMAT_MJPEG, 64 .fcc = V4L2_PIX_FMT_MJPEG, 65 }, 66 { 67 .name = "YVU 4:2:0 (YV12)", 68 .guid = UVC_GUID_FORMAT_YV12, 69 .fcc = V4L2_PIX_FMT_YVU420, 70 }, 71 { 72 .name = "YUV 4:2:0 (I420)", 73 .guid = UVC_GUID_FORMAT_I420, 74 .fcc = V4L2_PIX_FMT_YUV420, 75 }, 76 { 77 .name = "YUV 4:2:0 (M420)", 78 .guid = UVC_GUID_FORMAT_M420, 79 .fcc = V4L2_PIX_FMT_M420, 80 }, 81 { 82 .name = "YUV 4:2:2 (UYVY)", 83 .guid = UVC_GUID_FORMAT_UYVY, 84 .fcc = V4L2_PIX_FMT_UYVY, 85 }, 86 { 87 .name = "Greyscale 8-bit (Y800)", 88 .guid = UVC_GUID_FORMAT_Y800, 89 .fcc = V4L2_PIX_FMT_GREY, 90 }, 91 { 92 .name = "Greyscale 8-bit (Y8 )", 93 .guid = UVC_GUID_FORMAT_Y8, 94 .fcc = V4L2_PIX_FMT_GREY, 95 }, 96 { 97 .name = "Greyscale 10-bit (Y10 )", 98 .guid = UVC_GUID_FORMAT_Y10, 99 .fcc = V4L2_PIX_FMT_Y10, 100 }, 101 { 102 .name = "Greyscale 12-bit (Y12 )", 103 .guid = UVC_GUID_FORMAT_Y12, 104 .fcc = V4L2_PIX_FMT_Y12, 105 }, 106 { 107 .name = "Greyscale 16-bit (Y16 )", 108 .guid = UVC_GUID_FORMAT_Y16, 109 .fcc = V4L2_PIX_FMT_Y16, 110 }, 111 { 112 .name = "BGGR Bayer (BY8 )", 113 .guid = UVC_GUID_FORMAT_BY8, 114 .fcc = V4L2_PIX_FMT_SBGGR8, 115 }, 116 { 117 .name = "BGGR Bayer (BA81)", 118 .guid = UVC_GUID_FORMAT_BA81, 119 .fcc = V4L2_PIX_FMT_SBGGR8, 120 }, 121 { 122 .name = "GBRG Bayer (GBRG)", 123 .guid = UVC_GUID_FORMAT_GBRG, 124 .fcc = V4L2_PIX_FMT_SGBRG8, 125 }, 126 { 127 .name = "GRBG Bayer (GRBG)", 128 .guid = UVC_GUID_FORMAT_GRBG, 129 .fcc = V4L2_PIX_FMT_SGRBG8, 130 }, 131 { 132 .name = "RGGB Bayer (RGGB)", 133 .guid = UVC_GUID_FORMAT_RGGB, 134 .fcc = V4L2_PIX_FMT_SRGGB8, 135 }, 136 { 137 .name = "RGB565", 138 .guid = UVC_GUID_FORMAT_RGBP, 139 .fcc = V4L2_PIX_FMT_RGB565, 140 }, 141 { 142 .name = "BGR 8:8:8 (BGR3)", 143 .guid = UVC_GUID_FORMAT_BGR3, 144 .fcc = V4L2_PIX_FMT_BGR24, 145 }, 146 { 147 .name = "H.264", 148 .guid = UVC_GUID_FORMAT_H264, 149 .fcc = V4L2_PIX_FMT_H264, 150 }, 151 { 152 .name = "Greyscale 8 L/R (Y8I)", 153 .guid = UVC_GUID_FORMAT_Y8I, 154 .fcc = V4L2_PIX_FMT_Y8I, 155 }, 156 { 157 .name = "Greyscale 12 L/R (Y12I)", 158 .guid = UVC_GUID_FORMAT_Y12I, 159 .fcc = V4L2_PIX_FMT_Y12I, 160 }, 161 { 162 .name = "Depth data 16-bit (Z16)", 163 .guid = UVC_GUID_FORMAT_Z16, 164 .fcc = V4L2_PIX_FMT_Z16, 165 }, 166 { 167 .name = "Bayer 10-bit (SRGGB10P)", 168 .guid = UVC_GUID_FORMAT_RW10, 169 .fcc = V4L2_PIX_FMT_SRGGB10P, 170 }, 171 { 172 .name = "Bayer 16-bit (SBGGR16)", 173 .guid = UVC_GUID_FORMAT_BG16, 174 .fcc = V4L2_PIX_FMT_SBGGR16, 175 }, 176 { 177 .name = "Bayer 16-bit (SGBRG16)", 178 .guid = UVC_GUID_FORMAT_GB16, 179 .fcc = V4L2_PIX_FMT_SGBRG16, 180 }, 181 { 182 .name = "Bayer 16-bit (SRGGB16)", 183 .guid = UVC_GUID_FORMAT_RG16, 184 .fcc = V4L2_PIX_FMT_SRGGB16, 185 }, 186 { 187 .name = "Bayer 16-bit (SGRBG16)", 188 .guid = UVC_GUID_FORMAT_GR16, 189 .fcc = V4L2_PIX_FMT_SGRBG16, 190 }, 191 { 192 .name = "Depth data 16-bit (Z16)", 193 .guid = UVC_GUID_FORMAT_INVZ, 194 .fcc = V4L2_PIX_FMT_Z16, 195 }, 196 { 197 .name = "Greyscale 10-bit (Y10 )", 198 .guid = UVC_GUID_FORMAT_INVI, 199 .fcc = V4L2_PIX_FMT_Y10, 200 }, 201 { 202 .name = "IR:Depth 26-bit (INZI)", 203 .guid = UVC_GUID_FORMAT_INZI, 204 .fcc = V4L2_PIX_FMT_INZI, 205 }, 206 }; 207 208 /* ------------------------------------------------------------------------ 209 * Utility functions 210 */ 211 212 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 213 __u8 epaddr) 214 { 215 struct usb_host_endpoint *ep; 216 unsigned int i; 217 218 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 219 ep = &alts->endpoint[i]; 220 if (ep->desc.bEndpointAddress == epaddr) 221 return ep; 222 } 223 224 return NULL; 225 } 226 227 static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16]) 228 { 229 unsigned int len = ARRAY_SIZE(uvc_fmts); 230 unsigned int i; 231 232 for (i = 0; i < len; ++i) { 233 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) 234 return &uvc_fmts[i]; 235 } 236 237 return NULL; 238 } 239 240 static __u32 uvc_colorspace(const __u8 primaries) 241 { 242 static const __u8 colorprimaries[] = { 243 0, 244 V4L2_COLORSPACE_SRGB, 245 V4L2_COLORSPACE_470_SYSTEM_M, 246 V4L2_COLORSPACE_470_SYSTEM_BG, 247 V4L2_COLORSPACE_SMPTE170M, 248 V4L2_COLORSPACE_SMPTE240M, 249 }; 250 251 if (primaries < ARRAY_SIZE(colorprimaries)) 252 return colorprimaries[primaries]; 253 254 return 0; 255 } 256 257 /* Simplify a fraction using a simple continued fraction decomposition. The 258 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 259 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 260 * arbitrary parameters to remove non-significative terms from the simple 261 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 262 * respectively seems to give nice results. 263 */ 264 void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, 265 unsigned int n_terms, unsigned int threshold) 266 { 267 uint32_t *an; 268 uint32_t x, y, r; 269 unsigned int i, n; 270 271 an = kmalloc(n_terms * sizeof *an, GFP_KERNEL); 272 if (an == NULL) 273 return; 274 275 /* Convert the fraction to a simple continued fraction. See 276 * http://mathforum.org/dr.math/faq/faq.fractions.html 277 * Stop if the current term is bigger than or equal to the given 278 * threshold. 279 */ 280 x = *numerator; 281 y = *denominator; 282 283 for (n = 0; n < n_terms && y != 0; ++n) { 284 an[n] = x / y; 285 if (an[n] >= threshold) { 286 if (n < 2) 287 n++; 288 break; 289 } 290 291 r = x - an[n] * y; 292 x = y; 293 y = r; 294 } 295 296 /* Expand the simple continued fraction back to an integer fraction. */ 297 x = 0; 298 y = 1; 299 300 for (i = n; i > 0; --i) { 301 r = y; 302 y = an[i-1] * y + x; 303 x = r; 304 } 305 306 *numerator = y; 307 *denominator = x; 308 kfree(an); 309 } 310 311 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is 312 * to compute numerator / denominator * 10000000 using 32 bit fixed point 313 * arithmetic only. 314 */ 315 uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator) 316 { 317 uint32_t multiplier; 318 319 /* Saturate the result if the operation would overflow. */ 320 if (denominator == 0 || 321 numerator/denominator >= ((uint32_t)-1)/10000000) 322 return (uint32_t)-1; 323 324 /* Divide both the denominator and the multiplier by two until 325 * numerator * multiplier doesn't overflow. If anyone knows a better 326 * algorithm please let me know. 327 */ 328 multiplier = 10000000; 329 while (numerator > ((uint32_t)-1)/multiplier) { 330 multiplier /= 2; 331 denominator /= 2; 332 } 333 334 return denominator ? numerator * multiplier / denominator : 0; 335 } 336 337 /* ------------------------------------------------------------------------ 338 * Terminal and unit management 339 */ 340 341 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 342 { 343 struct uvc_entity *entity; 344 345 list_for_each_entry(entity, &dev->entities, list) { 346 if (entity->id == id) 347 return entity; 348 } 349 350 return NULL; 351 } 352 353 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 354 int id, struct uvc_entity *entity) 355 { 356 unsigned int i; 357 358 if (entity == NULL) 359 entity = list_entry(&dev->entities, struct uvc_entity, list); 360 361 list_for_each_entry_continue(entity, &dev->entities, list) { 362 for (i = 0; i < entity->bNrInPins; ++i) 363 if (entity->baSourceID[i] == id) 364 return entity; 365 } 366 367 return NULL; 368 } 369 370 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 371 { 372 struct uvc_streaming *stream; 373 374 list_for_each_entry(stream, &dev->streams, list) { 375 if (stream->header.bTerminalLink == id) 376 return stream; 377 } 378 379 return NULL; 380 } 381 382 /* ------------------------------------------------------------------------ 383 * Descriptors parsing 384 */ 385 386 static int uvc_parse_format(struct uvc_device *dev, 387 struct uvc_streaming *streaming, struct uvc_format *format, 388 __u32 **intervals, unsigned char *buffer, int buflen) 389 { 390 struct usb_interface *intf = streaming->intf; 391 struct usb_host_interface *alts = intf->cur_altsetting; 392 struct uvc_format_desc *fmtdesc; 393 struct uvc_frame *frame; 394 const unsigned char *start = buffer; 395 unsigned int width_multiplier = 1; 396 unsigned int interval; 397 unsigned int i, n; 398 __u8 ftype; 399 400 format->type = buffer[2]; 401 format->index = buffer[3]; 402 403 switch (buffer[2]) { 404 case UVC_VS_FORMAT_UNCOMPRESSED: 405 case UVC_VS_FORMAT_FRAME_BASED: 406 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 407 if (buflen < n) { 408 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 409 "interface %d FORMAT error\n", 410 dev->udev->devnum, 411 alts->desc.bInterfaceNumber); 412 return -EINVAL; 413 } 414 415 /* Find the format descriptor from its GUID. */ 416 fmtdesc = uvc_format_by_guid(&buffer[5]); 417 418 if (fmtdesc != NULL) { 419 strlcpy(format->name, fmtdesc->name, 420 sizeof format->name); 421 format->fcc = fmtdesc->fcc; 422 } else { 423 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 424 &buffer[5]); 425 snprintf(format->name, sizeof(format->name), "%pUl\n", 426 &buffer[5]); 427 format->fcc = 0; 428 } 429 430 format->bpp = buffer[21]; 431 432 /* Some devices report a format that doesn't match what they 433 * really send. 434 */ 435 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 436 if (format->fcc == V4L2_PIX_FMT_YUYV) { 437 strlcpy(format->name, "Greyscale 8-bit (Y8 )", 438 sizeof(format->name)); 439 format->fcc = V4L2_PIX_FMT_GREY; 440 format->bpp = 8; 441 width_multiplier = 2; 442 } 443 } 444 445 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 446 ftype = UVC_VS_FRAME_UNCOMPRESSED; 447 } else { 448 ftype = UVC_VS_FRAME_FRAME_BASED; 449 if (buffer[27]) 450 format->flags = UVC_FMT_FLAG_COMPRESSED; 451 } 452 break; 453 454 case UVC_VS_FORMAT_MJPEG: 455 if (buflen < 11) { 456 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 457 "interface %d FORMAT error\n", 458 dev->udev->devnum, 459 alts->desc.bInterfaceNumber); 460 return -EINVAL; 461 } 462 463 strlcpy(format->name, "MJPEG", sizeof format->name); 464 format->fcc = V4L2_PIX_FMT_MJPEG; 465 format->flags = UVC_FMT_FLAG_COMPRESSED; 466 format->bpp = 0; 467 ftype = UVC_VS_FRAME_MJPEG; 468 break; 469 470 case UVC_VS_FORMAT_DV: 471 if (buflen < 9) { 472 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 473 "interface %d FORMAT error\n", 474 dev->udev->devnum, 475 alts->desc.bInterfaceNumber); 476 return -EINVAL; 477 } 478 479 switch (buffer[8] & 0x7f) { 480 case 0: 481 strlcpy(format->name, "SD-DV", sizeof format->name); 482 break; 483 case 1: 484 strlcpy(format->name, "SDL-DV", sizeof format->name); 485 break; 486 case 2: 487 strlcpy(format->name, "HD-DV", sizeof format->name); 488 break; 489 default: 490 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 491 "interface %d: unknown DV format %u\n", 492 dev->udev->devnum, 493 alts->desc.bInterfaceNumber, buffer[8]); 494 return -EINVAL; 495 } 496 497 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 498 sizeof format->name); 499 500 format->fcc = V4L2_PIX_FMT_DV; 501 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 502 format->bpp = 0; 503 ftype = 0; 504 505 /* Create a dummy frame descriptor. */ 506 frame = &format->frame[0]; 507 memset(&format->frame[0], 0, sizeof format->frame[0]); 508 frame->bFrameIntervalType = 1; 509 frame->dwDefaultFrameInterval = 1; 510 frame->dwFrameInterval = *intervals; 511 *(*intervals)++ = 1; 512 format->nframes = 1; 513 break; 514 515 case UVC_VS_FORMAT_MPEG2TS: 516 case UVC_VS_FORMAT_STREAM_BASED: 517 /* Not supported yet. */ 518 default: 519 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 520 "interface %d unsupported format %u\n", 521 dev->udev->devnum, alts->desc.bInterfaceNumber, 522 buffer[2]); 523 return -EINVAL; 524 } 525 526 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 527 528 buflen -= buffer[0]; 529 buffer += buffer[0]; 530 531 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 532 * based formats have frame descriptors. 533 */ 534 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 535 buffer[2] == ftype) { 536 frame = &format->frame[format->nframes]; 537 if (ftype != UVC_VS_FRAME_FRAME_BASED) 538 n = buflen > 25 ? buffer[25] : 0; 539 else 540 n = buflen > 21 ? buffer[21] : 0; 541 542 n = n ? n : 3; 543 544 if (buflen < 26 + 4*n) { 545 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 546 "interface %d FRAME error\n", dev->udev->devnum, 547 alts->desc.bInterfaceNumber); 548 return -EINVAL; 549 } 550 551 frame->bFrameIndex = buffer[3]; 552 frame->bmCapabilities = buffer[4]; 553 frame->wWidth = get_unaligned_le16(&buffer[5]) 554 * width_multiplier; 555 frame->wHeight = get_unaligned_le16(&buffer[7]); 556 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 557 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 558 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 559 frame->dwMaxVideoFrameBufferSize = 560 get_unaligned_le32(&buffer[17]); 561 frame->dwDefaultFrameInterval = 562 get_unaligned_le32(&buffer[21]); 563 frame->bFrameIntervalType = buffer[25]; 564 } else { 565 frame->dwMaxVideoFrameBufferSize = 0; 566 frame->dwDefaultFrameInterval = 567 get_unaligned_le32(&buffer[17]); 568 frame->bFrameIntervalType = buffer[21]; 569 } 570 frame->dwFrameInterval = *intervals; 571 572 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 573 * completely. Observed behaviours range from setting the 574 * value to 1.1x the actual frame size to hardwiring the 575 * 16 low bits to 0. This results in a higher than necessary 576 * memory usage as well as a wrong image size information. For 577 * uncompressed formats this can be fixed by computing the 578 * value from the frame size. 579 */ 580 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 581 frame->dwMaxVideoFrameBufferSize = format->bpp 582 * frame->wWidth * frame->wHeight / 8; 583 584 /* Some bogus devices report dwMinFrameInterval equal to 585 * dwMaxFrameInterval and have dwFrameIntervalStep set to 586 * zero. Setting all null intervals to 1 fixes the problem and 587 * some other divisions by zero that could happen. 588 */ 589 for (i = 0; i < n; ++i) { 590 interval = get_unaligned_le32(&buffer[26+4*i]); 591 *(*intervals)++ = interval ? interval : 1; 592 } 593 594 /* Make sure that the default frame interval stays between 595 * the boundaries. 596 */ 597 n -= frame->bFrameIntervalType ? 1 : 2; 598 frame->dwDefaultFrameInterval = 599 min(frame->dwFrameInterval[n], 600 max(frame->dwFrameInterval[0], 601 frame->dwDefaultFrameInterval)); 602 603 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 604 frame->bFrameIntervalType = 1; 605 frame->dwFrameInterval[0] = 606 frame->dwDefaultFrameInterval; 607 } 608 609 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 610 frame->wWidth, frame->wHeight, 611 10000000/frame->dwDefaultFrameInterval, 612 (100000000/frame->dwDefaultFrameInterval)%10); 613 614 format->nframes++; 615 buflen -= buffer[0]; 616 buffer += buffer[0]; 617 } 618 619 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 620 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 621 buflen -= buffer[0]; 622 buffer += buffer[0]; 623 } 624 625 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 626 buffer[2] == UVC_VS_COLORFORMAT) { 627 if (buflen < 6) { 628 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 629 "interface %d COLORFORMAT error\n", 630 dev->udev->devnum, 631 alts->desc.bInterfaceNumber); 632 return -EINVAL; 633 } 634 635 format->colorspace = uvc_colorspace(buffer[3]); 636 637 buflen -= buffer[0]; 638 buffer += buffer[0]; 639 } 640 641 return buffer - start; 642 } 643 644 static int uvc_parse_streaming(struct uvc_device *dev, 645 struct usb_interface *intf) 646 { 647 struct uvc_streaming *streaming = NULL; 648 struct uvc_format *format; 649 struct uvc_frame *frame; 650 struct usb_host_interface *alts = &intf->altsetting[0]; 651 unsigned char *_buffer, *buffer = alts->extra; 652 int _buflen, buflen = alts->extralen; 653 unsigned int nformats = 0, nframes = 0, nintervals = 0; 654 unsigned int size, i, n, p; 655 __u32 *interval; 656 __u16 psize; 657 int ret = -EINVAL; 658 659 if (intf->cur_altsetting->desc.bInterfaceSubClass 660 != UVC_SC_VIDEOSTREAMING) { 661 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 662 "video streaming interface\n", dev->udev->devnum, 663 intf->altsetting[0].desc.bInterfaceNumber); 664 return -EINVAL; 665 } 666 667 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 668 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 669 "claimed\n", dev->udev->devnum, 670 intf->altsetting[0].desc.bInterfaceNumber); 671 return -EINVAL; 672 } 673 674 streaming = kzalloc(sizeof *streaming, GFP_KERNEL); 675 if (streaming == NULL) { 676 usb_driver_release_interface(&uvc_driver.driver, intf); 677 return -EINVAL; 678 } 679 680 mutex_init(&streaming->mutex); 681 streaming->dev = dev; 682 streaming->intf = usb_get_intf(intf); 683 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 684 685 /* The Pico iMage webcam has its class-specific interface descriptors 686 * after the endpoint descriptors. 687 */ 688 if (buflen == 0) { 689 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 690 struct usb_host_endpoint *ep = &alts->endpoint[i]; 691 692 if (ep->extralen == 0) 693 continue; 694 695 if (ep->extralen > 2 && 696 ep->extra[1] == USB_DT_CS_INTERFACE) { 697 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 698 "from endpoint %u.\n", i); 699 buffer = alts->endpoint[i].extra; 700 buflen = alts->endpoint[i].extralen; 701 break; 702 } 703 } 704 } 705 706 /* Skip the standard interface descriptors. */ 707 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 708 buflen -= buffer[0]; 709 buffer += buffer[0]; 710 } 711 712 if (buflen <= 2) { 713 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 714 "interface descriptors found.\n"); 715 goto error; 716 } 717 718 /* Parse the header descriptor. */ 719 switch (buffer[2]) { 720 case UVC_VS_OUTPUT_HEADER: 721 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 722 size = 9; 723 break; 724 725 case UVC_VS_INPUT_HEADER: 726 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 727 size = 13; 728 break; 729 730 default: 731 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 732 "%d HEADER descriptor not found.\n", dev->udev->devnum, 733 alts->desc.bInterfaceNumber); 734 goto error; 735 } 736 737 p = buflen >= 4 ? buffer[3] : 0; 738 n = buflen >= size ? buffer[size-1] : 0; 739 740 if (buflen < size + p*n) { 741 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 742 "interface %d HEADER descriptor is invalid.\n", 743 dev->udev->devnum, alts->desc.bInterfaceNumber); 744 goto error; 745 } 746 747 streaming->header.bNumFormats = p; 748 streaming->header.bEndpointAddress = buffer[6]; 749 if (buffer[2] == UVC_VS_INPUT_HEADER) { 750 streaming->header.bmInfo = buffer[7]; 751 streaming->header.bTerminalLink = buffer[8]; 752 streaming->header.bStillCaptureMethod = buffer[9]; 753 streaming->header.bTriggerSupport = buffer[10]; 754 streaming->header.bTriggerUsage = buffer[11]; 755 } else { 756 streaming->header.bTerminalLink = buffer[7]; 757 } 758 streaming->header.bControlSize = n; 759 760 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 761 GFP_KERNEL); 762 if (streaming->header.bmaControls == NULL) { 763 ret = -ENOMEM; 764 goto error; 765 } 766 767 buflen -= buffer[0]; 768 buffer += buffer[0]; 769 770 _buffer = buffer; 771 _buflen = buflen; 772 773 /* Count the format and frame descriptors. */ 774 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 775 switch (_buffer[2]) { 776 case UVC_VS_FORMAT_UNCOMPRESSED: 777 case UVC_VS_FORMAT_MJPEG: 778 case UVC_VS_FORMAT_FRAME_BASED: 779 nformats++; 780 break; 781 782 case UVC_VS_FORMAT_DV: 783 /* DV format has no frame descriptor. We will create a 784 * dummy frame descriptor with a dummy frame interval. 785 */ 786 nformats++; 787 nframes++; 788 nintervals++; 789 break; 790 791 case UVC_VS_FORMAT_MPEG2TS: 792 case UVC_VS_FORMAT_STREAM_BASED: 793 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 794 "interface %d FORMAT %u is not supported.\n", 795 dev->udev->devnum, 796 alts->desc.bInterfaceNumber, _buffer[2]); 797 break; 798 799 case UVC_VS_FRAME_UNCOMPRESSED: 800 case UVC_VS_FRAME_MJPEG: 801 nframes++; 802 if (_buflen > 25) 803 nintervals += _buffer[25] ? _buffer[25] : 3; 804 break; 805 806 case UVC_VS_FRAME_FRAME_BASED: 807 nframes++; 808 if (_buflen > 21) 809 nintervals += _buffer[21] ? _buffer[21] : 3; 810 break; 811 } 812 813 _buflen -= _buffer[0]; 814 _buffer += _buffer[0]; 815 } 816 817 if (nformats == 0) { 818 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 819 "%d has no supported formats defined.\n", 820 dev->udev->devnum, alts->desc.bInterfaceNumber); 821 goto error; 822 } 823 824 size = nformats * sizeof *format + nframes * sizeof *frame 825 + nintervals * sizeof *interval; 826 format = kzalloc(size, GFP_KERNEL); 827 if (format == NULL) { 828 ret = -ENOMEM; 829 goto error; 830 } 831 832 frame = (struct uvc_frame *)&format[nformats]; 833 interval = (__u32 *)&frame[nframes]; 834 835 streaming->format = format; 836 streaming->nformats = nformats; 837 838 /* Parse the format descriptors. */ 839 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 840 switch (buffer[2]) { 841 case UVC_VS_FORMAT_UNCOMPRESSED: 842 case UVC_VS_FORMAT_MJPEG: 843 case UVC_VS_FORMAT_DV: 844 case UVC_VS_FORMAT_FRAME_BASED: 845 format->frame = frame; 846 ret = uvc_parse_format(dev, streaming, format, 847 &interval, buffer, buflen); 848 if (ret < 0) 849 goto error; 850 851 frame += format->nframes; 852 format++; 853 854 buflen -= ret; 855 buffer += ret; 856 continue; 857 858 default: 859 break; 860 } 861 862 buflen -= buffer[0]; 863 buffer += buffer[0]; 864 } 865 866 if (buflen) 867 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 868 "%d has %u bytes of trailing descriptor garbage.\n", 869 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 870 871 /* Parse the alternate settings to find the maximum bandwidth. */ 872 for (i = 0; i < intf->num_altsetting; ++i) { 873 struct usb_host_endpoint *ep; 874 alts = &intf->altsetting[i]; 875 ep = uvc_find_endpoint(alts, 876 streaming->header.bEndpointAddress); 877 if (ep == NULL) 878 continue; 879 880 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 881 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 882 if (psize > streaming->maxpsize) 883 streaming->maxpsize = psize; 884 } 885 886 list_add_tail(&streaming->list, &dev->streams); 887 return 0; 888 889 error: 890 usb_driver_release_interface(&uvc_driver.driver, intf); 891 usb_put_intf(intf); 892 kfree(streaming->format); 893 kfree(streaming->header.bmaControls); 894 kfree(streaming); 895 return ret; 896 } 897 898 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 899 unsigned int num_pads, unsigned int extra_size) 900 { 901 struct uvc_entity *entity; 902 unsigned int num_inputs; 903 unsigned int size; 904 unsigned int i; 905 906 extra_size = ALIGN(extra_size, sizeof(*entity->pads)); 907 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 908 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 909 + num_inputs; 910 entity = kzalloc(size, GFP_KERNEL); 911 if (entity == NULL) 912 return NULL; 913 914 entity->id = id; 915 entity->type = type; 916 917 entity->num_links = 0; 918 entity->num_pads = num_pads; 919 entity->pads = ((void *)(entity + 1)) + extra_size; 920 921 for (i = 0; i < num_inputs; ++i) 922 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 923 if (!UVC_ENTITY_IS_OTERM(entity)) 924 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 925 926 entity->bNrInPins = num_inputs; 927 entity->baSourceID = (__u8 *)(&entity->pads[num_pads]); 928 929 return entity; 930 } 931 932 /* Parse vendor-specific extensions. */ 933 static int uvc_parse_vendor_control(struct uvc_device *dev, 934 const unsigned char *buffer, int buflen) 935 { 936 struct usb_device *udev = dev->udev; 937 struct usb_host_interface *alts = dev->intf->cur_altsetting; 938 struct uvc_entity *unit; 939 unsigned int n, p; 940 int handled = 0; 941 942 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 943 case 0x046d: /* Logitech */ 944 if (buffer[1] != 0x41 || buffer[2] != 0x01) 945 break; 946 947 /* Logitech implements several vendor specific functions 948 * through vendor specific extension units (LXU). 949 * 950 * The LXU descriptors are similar to XU descriptors 951 * (see "USB Device Video Class for Video Devices", section 952 * 3.7.2.6 "Extension Unit Descriptor") with the following 953 * differences: 954 * 955 * ---------------------------------------------------------- 956 * 0 bLength 1 Number 957 * Size of this descriptor, in bytes: 24+p+n*2 958 * ---------------------------------------------------------- 959 * 23+p+n bmControlsType N Bitmap 960 * Individual bits in the set are defined: 961 * 0: Absolute 962 * 1: Relative 963 * 964 * This bitset is mapped exactly the same as bmControls. 965 * ---------------------------------------------------------- 966 * 23+p+n*2 bReserved 1 Boolean 967 * ---------------------------------------------------------- 968 * 24+p+n*2 iExtension 1 Index 969 * Index of a string descriptor that describes this 970 * extension unit. 971 * ---------------------------------------------------------- 972 */ 973 p = buflen >= 22 ? buffer[21] : 0; 974 n = buflen >= 25 + p ? buffer[22+p] : 0; 975 976 if (buflen < 25 + p + 2*n) { 977 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 978 "interface %d EXTENSION_UNIT error\n", 979 udev->devnum, alts->desc.bInterfaceNumber); 980 break; 981 } 982 983 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 984 p + 1, 2*n); 985 if (unit == NULL) 986 return -ENOMEM; 987 988 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 989 unit->extension.bNumControls = buffer[20]; 990 memcpy(unit->baSourceID, &buffer[22], p); 991 unit->extension.bControlSize = buffer[22+p]; 992 unit->extension.bmControls = (__u8 *)unit + sizeof(*unit); 993 unit->extension.bmControlsType = (__u8 *)unit + sizeof(*unit) 994 + n; 995 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 996 997 if (buffer[24+p+2*n] != 0) 998 usb_string(udev, buffer[24+p+2*n], unit->name, 999 sizeof unit->name); 1000 else 1001 sprintf(unit->name, "Extension %u", buffer[3]); 1002 1003 list_add_tail(&unit->list, &dev->entities); 1004 handled = 1; 1005 break; 1006 } 1007 1008 return handled; 1009 } 1010 1011 static int uvc_parse_standard_control(struct uvc_device *dev, 1012 const unsigned char *buffer, int buflen) 1013 { 1014 struct usb_device *udev = dev->udev; 1015 struct uvc_entity *unit, *term; 1016 struct usb_interface *intf; 1017 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1018 unsigned int i, n, p, len; 1019 __u16 type; 1020 1021 switch (buffer[2]) { 1022 case UVC_VC_HEADER: 1023 n = buflen >= 12 ? buffer[11] : 0; 1024 1025 if (buflen < 12 + n) { 1026 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1027 "interface %d HEADER error\n", udev->devnum, 1028 alts->desc.bInterfaceNumber); 1029 return -EINVAL; 1030 } 1031 1032 dev->uvc_version = get_unaligned_le16(&buffer[3]); 1033 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 1034 1035 /* Parse all USB Video Streaming interfaces. */ 1036 for (i = 0; i < n; ++i) { 1037 intf = usb_ifnum_to_if(udev, buffer[12+i]); 1038 if (intf == NULL) { 1039 uvc_trace(UVC_TRACE_DESCR, "device %d " 1040 "interface %d doesn't exists\n", 1041 udev->devnum, i); 1042 continue; 1043 } 1044 1045 uvc_parse_streaming(dev, intf); 1046 } 1047 break; 1048 1049 case UVC_VC_INPUT_TERMINAL: 1050 if (buflen < 8) { 1051 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1052 "interface %d INPUT_TERMINAL error\n", 1053 udev->devnum, alts->desc.bInterfaceNumber); 1054 return -EINVAL; 1055 } 1056 1057 /* Make sure the terminal type MSB is not null, otherwise it 1058 * could be confused with a unit. 1059 */ 1060 type = get_unaligned_le16(&buffer[4]); 1061 if ((type & 0xff00) == 0) { 1062 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1063 "interface %d INPUT_TERMINAL %d has invalid " 1064 "type 0x%04x, skipping\n", udev->devnum, 1065 alts->desc.bInterfaceNumber, 1066 buffer[3], type); 1067 return 0; 1068 } 1069 1070 n = 0; 1071 p = 0; 1072 len = 8; 1073 1074 if (type == UVC_ITT_CAMERA) { 1075 n = buflen >= 15 ? buffer[14] : 0; 1076 len = 15; 1077 1078 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1079 n = buflen >= 9 ? buffer[8] : 0; 1080 p = buflen >= 10 + n ? buffer[9+n] : 0; 1081 len = 10; 1082 } 1083 1084 if (buflen < len + n + p) { 1085 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1086 "interface %d INPUT_TERMINAL error\n", 1087 udev->devnum, alts->desc.bInterfaceNumber); 1088 return -EINVAL; 1089 } 1090 1091 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1092 1, n + p); 1093 if (term == NULL) 1094 return -ENOMEM; 1095 1096 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1097 term->camera.bControlSize = n; 1098 term->camera.bmControls = (__u8 *)term + sizeof *term; 1099 term->camera.wObjectiveFocalLengthMin = 1100 get_unaligned_le16(&buffer[8]); 1101 term->camera.wObjectiveFocalLengthMax = 1102 get_unaligned_le16(&buffer[10]); 1103 term->camera.wOcularFocalLength = 1104 get_unaligned_le16(&buffer[12]); 1105 memcpy(term->camera.bmControls, &buffer[15], n); 1106 } else if (UVC_ENTITY_TYPE(term) == 1107 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1108 term->media.bControlSize = n; 1109 term->media.bmControls = (__u8 *)term + sizeof *term; 1110 term->media.bTransportModeSize = p; 1111 term->media.bmTransportModes = (__u8 *)term 1112 + sizeof *term + n; 1113 memcpy(term->media.bmControls, &buffer[9], n); 1114 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1115 } 1116 1117 if (buffer[7] != 0) 1118 usb_string(udev, buffer[7], term->name, 1119 sizeof term->name); 1120 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1121 sprintf(term->name, "Camera %u", buffer[3]); 1122 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1123 sprintf(term->name, "Media %u", buffer[3]); 1124 else 1125 sprintf(term->name, "Input %u", buffer[3]); 1126 1127 list_add_tail(&term->list, &dev->entities); 1128 break; 1129 1130 case UVC_VC_OUTPUT_TERMINAL: 1131 if (buflen < 9) { 1132 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1133 "interface %d OUTPUT_TERMINAL error\n", 1134 udev->devnum, alts->desc.bInterfaceNumber); 1135 return -EINVAL; 1136 } 1137 1138 /* Make sure the terminal type MSB is not null, otherwise it 1139 * could be confused with a unit. 1140 */ 1141 type = get_unaligned_le16(&buffer[4]); 1142 if ((type & 0xff00) == 0) { 1143 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1144 "interface %d OUTPUT_TERMINAL %d has invalid " 1145 "type 0x%04x, skipping\n", udev->devnum, 1146 alts->desc.bInterfaceNumber, buffer[3], type); 1147 return 0; 1148 } 1149 1150 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1151 1, 0); 1152 if (term == NULL) 1153 return -ENOMEM; 1154 1155 memcpy(term->baSourceID, &buffer[7], 1); 1156 1157 if (buffer[8] != 0) 1158 usb_string(udev, buffer[8], term->name, 1159 sizeof term->name); 1160 else 1161 sprintf(term->name, "Output %u", buffer[3]); 1162 1163 list_add_tail(&term->list, &dev->entities); 1164 break; 1165 1166 case UVC_VC_SELECTOR_UNIT: 1167 p = buflen >= 5 ? buffer[4] : 0; 1168 1169 if (buflen < 5 || buflen < 6 + p) { 1170 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1171 "interface %d SELECTOR_UNIT error\n", 1172 udev->devnum, alts->desc.bInterfaceNumber); 1173 return -EINVAL; 1174 } 1175 1176 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1177 if (unit == NULL) 1178 return -ENOMEM; 1179 1180 memcpy(unit->baSourceID, &buffer[5], p); 1181 1182 if (buffer[5+p] != 0) 1183 usb_string(udev, buffer[5+p], unit->name, 1184 sizeof unit->name); 1185 else 1186 sprintf(unit->name, "Selector %u", buffer[3]); 1187 1188 list_add_tail(&unit->list, &dev->entities); 1189 break; 1190 1191 case UVC_VC_PROCESSING_UNIT: 1192 n = buflen >= 8 ? buffer[7] : 0; 1193 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1194 1195 if (buflen < p + n) { 1196 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1197 "interface %d PROCESSING_UNIT error\n", 1198 udev->devnum, alts->desc.bInterfaceNumber); 1199 return -EINVAL; 1200 } 1201 1202 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1203 if (unit == NULL) 1204 return -ENOMEM; 1205 1206 memcpy(unit->baSourceID, &buffer[4], 1); 1207 unit->processing.wMaxMultiplier = 1208 get_unaligned_le16(&buffer[5]); 1209 unit->processing.bControlSize = buffer[7]; 1210 unit->processing.bmControls = (__u8 *)unit + sizeof *unit; 1211 memcpy(unit->processing.bmControls, &buffer[8], n); 1212 if (dev->uvc_version >= 0x0110) 1213 unit->processing.bmVideoStandards = buffer[9+n]; 1214 1215 if (buffer[8+n] != 0) 1216 usb_string(udev, buffer[8+n], unit->name, 1217 sizeof unit->name); 1218 else 1219 sprintf(unit->name, "Processing %u", buffer[3]); 1220 1221 list_add_tail(&unit->list, &dev->entities); 1222 break; 1223 1224 case UVC_VC_EXTENSION_UNIT: 1225 p = buflen >= 22 ? buffer[21] : 0; 1226 n = buflen >= 24 + p ? buffer[22+p] : 0; 1227 1228 if (buflen < 24 + p + n) { 1229 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1230 "interface %d EXTENSION_UNIT error\n", 1231 udev->devnum, alts->desc.bInterfaceNumber); 1232 return -EINVAL; 1233 } 1234 1235 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1236 if (unit == NULL) 1237 return -ENOMEM; 1238 1239 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1240 unit->extension.bNumControls = buffer[20]; 1241 memcpy(unit->baSourceID, &buffer[22], p); 1242 unit->extension.bControlSize = buffer[22+p]; 1243 unit->extension.bmControls = (__u8 *)unit + sizeof *unit; 1244 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1245 1246 if (buffer[23+p+n] != 0) 1247 usb_string(udev, buffer[23+p+n], unit->name, 1248 sizeof unit->name); 1249 else 1250 sprintf(unit->name, "Extension %u", buffer[3]); 1251 1252 list_add_tail(&unit->list, &dev->entities); 1253 break; 1254 1255 default: 1256 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1257 "descriptor (%u)\n", buffer[2]); 1258 break; 1259 } 1260 1261 return 0; 1262 } 1263 1264 static int uvc_parse_control(struct uvc_device *dev) 1265 { 1266 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1267 unsigned char *buffer = alts->extra; 1268 int buflen = alts->extralen; 1269 int ret; 1270 1271 /* Parse the default alternate setting only, as the UVC specification 1272 * defines a single alternate setting, the default alternate setting 1273 * zero. 1274 */ 1275 1276 while (buflen > 2) { 1277 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1278 buffer[1] != USB_DT_CS_INTERFACE) 1279 goto next_descriptor; 1280 1281 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1282 return ret; 1283 1284 next_descriptor: 1285 buflen -= buffer[0]; 1286 buffer += buffer[0]; 1287 } 1288 1289 /* Check if the optional status endpoint is present. Built-in iSight 1290 * webcams have an interrupt endpoint but spit proprietary data that 1291 * don't conform to the UVC status endpoint messages. Don't try to 1292 * handle the interrupt endpoint for those cameras. 1293 */ 1294 if (alts->desc.bNumEndpoints == 1 && 1295 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1296 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1297 struct usb_endpoint_descriptor *desc = &ep->desc; 1298 1299 if (usb_endpoint_is_int_in(desc) && 1300 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1301 desc->bInterval != 0) { 1302 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1303 "(addr %02x).\n", desc->bEndpointAddress); 1304 dev->int_ep = ep; 1305 } 1306 } 1307 1308 return 0; 1309 } 1310 1311 /* ------------------------------------------------------------------------ 1312 * UVC device scan 1313 */ 1314 1315 /* 1316 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1317 * and containing the following units: 1318 * 1319 * - one or more Output Terminals (USB Streaming or Display) 1320 * - zero or one Processing Unit 1321 * - zero, one or more single-input Selector Units 1322 * - zero or one multiple-input Selector Units, provided all inputs are 1323 * connected to input terminals 1324 * - zero, one or mode single-input Extension Units 1325 * - one or more Input Terminals (Camera, External or USB Streaming) 1326 * 1327 * The terminal and units must match on of the following structures: 1328 * 1329 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1330 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1331 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1332 * 1333 * +---------+ +---------+ -> OTT_*(0) 1334 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1335 * +---------+ +---------+ -> OTT_*(n) 1336 * 1337 * The Processing Unit and Extension Units can be in any order. Additional 1338 * Extension Units connected to the main chain as single-unit branches are 1339 * also supported. Single-input Selector Units are ignored. 1340 */ 1341 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1342 struct uvc_entity *entity) 1343 { 1344 switch (UVC_ENTITY_TYPE(entity)) { 1345 case UVC_VC_EXTENSION_UNIT: 1346 if (uvc_trace_param & UVC_TRACE_PROBE) 1347 printk(KERN_CONT " <- XU %d", entity->id); 1348 1349 if (entity->bNrInPins != 1) { 1350 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1351 "than 1 input pin.\n", entity->id); 1352 return -1; 1353 } 1354 1355 break; 1356 1357 case UVC_VC_PROCESSING_UNIT: 1358 if (uvc_trace_param & UVC_TRACE_PROBE) 1359 printk(KERN_CONT " <- PU %d", entity->id); 1360 1361 if (chain->processing != NULL) { 1362 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1363 "Processing Units in chain.\n"); 1364 return -1; 1365 } 1366 1367 chain->processing = entity; 1368 break; 1369 1370 case UVC_VC_SELECTOR_UNIT: 1371 if (uvc_trace_param & UVC_TRACE_PROBE) 1372 printk(KERN_CONT " <- SU %d", entity->id); 1373 1374 /* Single-input selector units are ignored. */ 1375 if (entity->bNrInPins == 1) 1376 break; 1377 1378 if (chain->selector != NULL) { 1379 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1380 "Units in chain.\n"); 1381 return -1; 1382 } 1383 1384 chain->selector = entity; 1385 break; 1386 1387 case UVC_ITT_VENDOR_SPECIFIC: 1388 case UVC_ITT_CAMERA: 1389 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1390 if (uvc_trace_param & UVC_TRACE_PROBE) 1391 printk(KERN_CONT " <- IT %d\n", entity->id); 1392 1393 break; 1394 1395 case UVC_OTT_VENDOR_SPECIFIC: 1396 case UVC_OTT_DISPLAY: 1397 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1398 if (uvc_trace_param & UVC_TRACE_PROBE) 1399 printk(KERN_CONT " OT %d", entity->id); 1400 1401 break; 1402 1403 case UVC_TT_STREAMING: 1404 if (UVC_ENTITY_IS_ITERM(entity)) { 1405 if (uvc_trace_param & UVC_TRACE_PROBE) 1406 printk(KERN_CONT " <- IT %d\n", entity->id); 1407 } else { 1408 if (uvc_trace_param & UVC_TRACE_PROBE) 1409 printk(KERN_CONT " OT %d", entity->id); 1410 } 1411 1412 break; 1413 1414 default: 1415 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1416 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1417 return -1; 1418 } 1419 1420 list_add_tail(&entity->chain, &chain->entities); 1421 return 0; 1422 } 1423 1424 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1425 struct uvc_entity *entity, struct uvc_entity *prev) 1426 { 1427 struct uvc_entity *forward; 1428 int found; 1429 1430 /* Forward scan */ 1431 forward = NULL; 1432 found = 0; 1433 1434 while (1) { 1435 forward = uvc_entity_by_reference(chain->dev, entity->id, 1436 forward); 1437 if (forward == NULL) 1438 break; 1439 if (forward == prev) 1440 continue; 1441 1442 switch (UVC_ENTITY_TYPE(forward)) { 1443 case UVC_VC_EXTENSION_UNIT: 1444 if (forward->bNrInPins != 1) { 1445 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1446 "has more than 1 input pin.\n", 1447 entity->id); 1448 return -EINVAL; 1449 } 1450 1451 list_add_tail(&forward->chain, &chain->entities); 1452 if (uvc_trace_param & UVC_TRACE_PROBE) { 1453 if (!found) 1454 printk(KERN_CONT " (->"); 1455 1456 printk(KERN_CONT " XU %d", forward->id); 1457 found = 1; 1458 } 1459 break; 1460 1461 case UVC_OTT_VENDOR_SPECIFIC: 1462 case UVC_OTT_DISPLAY: 1463 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1464 case UVC_TT_STREAMING: 1465 if (UVC_ENTITY_IS_ITERM(forward)) { 1466 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1467 "terminal %u.\n", forward->id); 1468 return -EINVAL; 1469 } 1470 1471 list_add_tail(&forward->chain, &chain->entities); 1472 if (uvc_trace_param & UVC_TRACE_PROBE) { 1473 if (!found) 1474 printk(KERN_CONT " (->"); 1475 1476 printk(KERN_CONT " OT %d", forward->id); 1477 found = 1; 1478 } 1479 break; 1480 } 1481 } 1482 if (found) 1483 printk(KERN_CONT ")"); 1484 1485 return 0; 1486 } 1487 1488 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1489 struct uvc_entity **_entity) 1490 { 1491 struct uvc_entity *entity = *_entity; 1492 struct uvc_entity *term; 1493 int id = -EINVAL, i; 1494 1495 switch (UVC_ENTITY_TYPE(entity)) { 1496 case UVC_VC_EXTENSION_UNIT: 1497 case UVC_VC_PROCESSING_UNIT: 1498 id = entity->baSourceID[0]; 1499 break; 1500 1501 case UVC_VC_SELECTOR_UNIT: 1502 /* Single-input selector units are ignored. */ 1503 if (entity->bNrInPins == 1) { 1504 id = entity->baSourceID[0]; 1505 break; 1506 } 1507 1508 if (uvc_trace_param & UVC_TRACE_PROBE) 1509 printk(KERN_CONT " <- IT"); 1510 1511 chain->selector = entity; 1512 for (i = 0; i < entity->bNrInPins; ++i) { 1513 id = entity->baSourceID[i]; 1514 term = uvc_entity_by_id(chain->dev, id); 1515 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1516 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1517 "input %d isn't connected to an " 1518 "input terminal\n", entity->id, i); 1519 return -1; 1520 } 1521 1522 if (uvc_trace_param & UVC_TRACE_PROBE) 1523 printk(KERN_CONT " %d", term->id); 1524 1525 list_add_tail(&term->chain, &chain->entities); 1526 uvc_scan_chain_forward(chain, term, entity); 1527 } 1528 1529 if (uvc_trace_param & UVC_TRACE_PROBE) 1530 printk(KERN_CONT "\n"); 1531 1532 id = 0; 1533 break; 1534 1535 case UVC_ITT_VENDOR_SPECIFIC: 1536 case UVC_ITT_CAMERA: 1537 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1538 case UVC_OTT_VENDOR_SPECIFIC: 1539 case UVC_OTT_DISPLAY: 1540 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1541 case UVC_TT_STREAMING: 1542 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1543 break; 1544 } 1545 1546 if (id <= 0) { 1547 *_entity = NULL; 1548 return id; 1549 } 1550 1551 entity = uvc_entity_by_id(chain->dev, id); 1552 if (entity == NULL) { 1553 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1554 "unknown entity %d.\n", id); 1555 return -EINVAL; 1556 } 1557 1558 *_entity = entity; 1559 return 0; 1560 } 1561 1562 static int uvc_scan_chain(struct uvc_video_chain *chain, 1563 struct uvc_entity *term) 1564 { 1565 struct uvc_entity *entity, *prev; 1566 1567 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1568 1569 entity = term; 1570 prev = NULL; 1571 1572 while (entity != NULL) { 1573 /* Entity must not be part of an existing chain */ 1574 if (entity->chain.next || entity->chain.prev) { 1575 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1576 "entity %d already in chain.\n", entity->id); 1577 return -EINVAL; 1578 } 1579 1580 /* Process entity */ 1581 if (uvc_scan_chain_entity(chain, entity) < 0) 1582 return -EINVAL; 1583 1584 /* Forward scan */ 1585 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1586 return -EINVAL; 1587 1588 /* Backward scan */ 1589 prev = entity; 1590 if (uvc_scan_chain_backward(chain, &entity) < 0) 1591 return -EINVAL; 1592 } 1593 1594 return 0; 1595 } 1596 1597 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1598 char *buffer) 1599 { 1600 struct uvc_entity *term; 1601 unsigned int nterms = 0; 1602 char *p = buffer; 1603 1604 list_for_each_entry(term, terms, chain) { 1605 if (!UVC_ENTITY_IS_TERM(term) || 1606 UVC_TERM_DIRECTION(term) != dir) 1607 continue; 1608 1609 if (nterms) 1610 p += sprintf(p, ","); 1611 if (++nterms >= 4) { 1612 p += sprintf(p, "..."); 1613 break; 1614 } 1615 p += sprintf(p, "%u", term->id); 1616 } 1617 1618 return p - buffer; 1619 } 1620 1621 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1622 { 1623 static char buffer[43]; 1624 char *p = buffer; 1625 1626 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1627 p += sprintf(p, " -> "); 1628 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1629 1630 return buffer; 1631 } 1632 1633 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev) 1634 { 1635 struct uvc_video_chain *chain; 1636 1637 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1638 if (chain == NULL) 1639 return NULL; 1640 1641 INIT_LIST_HEAD(&chain->entities); 1642 mutex_init(&chain->ctrl_mutex); 1643 chain->dev = dev; 1644 v4l2_prio_init(&chain->prio); 1645 1646 return chain; 1647 } 1648 1649 /* 1650 * Fallback heuristic for devices that don't connect units and terminals in a 1651 * valid chain. 1652 * 1653 * Some devices have invalid baSourceID references, causing uvc_scan_chain() 1654 * to fail, but if we just take the entities we can find and put them together 1655 * in the most sensible chain we can think of, turns out they do work anyway. 1656 * Note: This heuristic assumes there is a single chain. 1657 * 1658 * At the time of writing, devices known to have such a broken chain are 1659 * - Acer Integrated Camera (5986:055a) 1660 * - Realtek rtl157a7 (0bda:57a7) 1661 */ 1662 static int uvc_scan_fallback(struct uvc_device *dev) 1663 { 1664 struct uvc_video_chain *chain; 1665 struct uvc_entity *iterm = NULL; 1666 struct uvc_entity *oterm = NULL; 1667 struct uvc_entity *entity; 1668 struct uvc_entity *prev; 1669 1670 /* 1671 * Start by locating the input and output terminals. We only support 1672 * devices with exactly one of each for now. 1673 */ 1674 list_for_each_entry(entity, &dev->entities, list) { 1675 if (UVC_ENTITY_IS_ITERM(entity)) { 1676 if (iterm) 1677 return -EINVAL; 1678 iterm = entity; 1679 } 1680 1681 if (UVC_ENTITY_IS_OTERM(entity)) { 1682 if (oterm) 1683 return -EINVAL; 1684 oterm = entity; 1685 } 1686 } 1687 1688 if (iterm == NULL || oterm == NULL) 1689 return -EINVAL; 1690 1691 /* Allocate the chain and fill it. */ 1692 chain = uvc_alloc_chain(dev); 1693 if (chain == NULL) 1694 return -ENOMEM; 1695 1696 if (uvc_scan_chain_entity(chain, oterm) < 0) 1697 goto error; 1698 1699 prev = oterm; 1700 1701 /* 1702 * Add all Processing and Extension Units with two pads. The order 1703 * doesn't matter much, use reverse list traversal to connect units in 1704 * UVC descriptor order as we build the chain from output to input. This 1705 * leads to units appearing in the order meant by the manufacturer for 1706 * the cameras known to require this heuristic. 1707 */ 1708 list_for_each_entry_reverse(entity, &dev->entities, list) { 1709 if (entity->type != UVC_VC_PROCESSING_UNIT && 1710 entity->type != UVC_VC_EXTENSION_UNIT) 1711 continue; 1712 1713 if (entity->num_pads != 2) 1714 continue; 1715 1716 if (uvc_scan_chain_entity(chain, entity) < 0) 1717 goto error; 1718 1719 prev->baSourceID[0] = entity->id; 1720 prev = entity; 1721 } 1722 1723 if (uvc_scan_chain_entity(chain, iterm) < 0) 1724 goto error; 1725 1726 prev->baSourceID[0] = iterm->id; 1727 1728 list_add_tail(&chain->list, &dev->chains); 1729 1730 uvc_trace(UVC_TRACE_PROBE, 1731 "Found a video chain by fallback heuristic (%s).\n", 1732 uvc_print_chain(chain)); 1733 1734 return 0; 1735 1736 error: 1737 kfree(chain); 1738 return -EINVAL; 1739 } 1740 1741 /* 1742 * Scan the device for video chains and register video devices. 1743 * 1744 * Chains are scanned starting at their output terminals and walked backwards. 1745 */ 1746 static int uvc_scan_device(struct uvc_device *dev) 1747 { 1748 struct uvc_video_chain *chain; 1749 struct uvc_entity *term; 1750 1751 list_for_each_entry(term, &dev->entities, list) { 1752 if (!UVC_ENTITY_IS_OTERM(term)) 1753 continue; 1754 1755 /* If the terminal is already included in a chain, skip it. 1756 * This can happen for chains that have multiple output 1757 * terminals, where all output terminals beside the first one 1758 * will be inserted in the chain in forward scans. 1759 */ 1760 if (term->chain.next || term->chain.prev) 1761 continue; 1762 1763 chain = uvc_alloc_chain(dev); 1764 if (chain == NULL) 1765 return -ENOMEM; 1766 1767 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1768 1769 if (uvc_scan_chain(chain, term) < 0) { 1770 kfree(chain); 1771 continue; 1772 } 1773 1774 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1775 uvc_print_chain(chain)); 1776 1777 list_add_tail(&chain->list, &dev->chains); 1778 } 1779 1780 if (list_empty(&dev->chains)) 1781 uvc_scan_fallback(dev); 1782 1783 if (list_empty(&dev->chains)) { 1784 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1785 return -1; 1786 } 1787 1788 return 0; 1789 } 1790 1791 /* ------------------------------------------------------------------------ 1792 * Video device registration and unregistration 1793 */ 1794 1795 /* 1796 * Delete the UVC device. 1797 * 1798 * Called by the kernel when the last reference to the uvc_device structure 1799 * is released. 1800 * 1801 * As this function is called after or during disconnect(), all URBs have 1802 * already been canceled by the USB core. There is no need to kill the 1803 * interrupt URB manually. 1804 */ 1805 static void uvc_delete(struct kref *kref) 1806 { 1807 struct uvc_device *dev = container_of(kref, struct uvc_device, ref); 1808 struct list_head *p, *n; 1809 1810 uvc_status_cleanup(dev); 1811 uvc_ctrl_cleanup_device(dev); 1812 1813 usb_put_intf(dev->intf); 1814 usb_put_dev(dev->udev); 1815 1816 if (dev->vdev.dev) 1817 v4l2_device_unregister(&dev->vdev); 1818 #ifdef CONFIG_MEDIA_CONTROLLER 1819 if (media_devnode_is_registered(dev->mdev.devnode)) 1820 media_device_unregister(&dev->mdev); 1821 media_device_cleanup(&dev->mdev); 1822 #endif 1823 1824 list_for_each_safe(p, n, &dev->chains) { 1825 struct uvc_video_chain *chain; 1826 chain = list_entry(p, struct uvc_video_chain, list); 1827 kfree(chain); 1828 } 1829 1830 list_for_each_safe(p, n, &dev->entities) { 1831 struct uvc_entity *entity; 1832 entity = list_entry(p, struct uvc_entity, list); 1833 #ifdef CONFIG_MEDIA_CONTROLLER 1834 uvc_mc_cleanup_entity(entity); 1835 #endif 1836 kfree(entity); 1837 } 1838 1839 list_for_each_safe(p, n, &dev->streams) { 1840 struct uvc_streaming *streaming; 1841 streaming = list_entry(p, struct uvc_streaming, list); 1842 usb_driver_release_interface(&uvc_driver.driver, 1843 streaming->intf); 1844 usb_put_intf(streaming->intf); 1845 kfree(streaming->format); 1846 kfree(streaming->header.bmaControls); 1847 kfree(streaming); 1848 } 1849 1850 kfree(dev); 1851 } 1852 1853 static void uvc_release(struct video_device *vdev) 1854 { 1855 struct uvc_streaming *stream = video_get_drvdata(vdev); 1856 struct uvc_device *dev = stream->dev; 1857 1858 kref_put(&dev->ref, uvc_delete); 1859 } 1860 1861 /* 1862 * Unregister the video devices. 1863 */ 1864 static void uvc_unregister_video(struct uvc_device *dev) 1865 { 1866 struct uvc_streaming *stream; 1867 1868 /* Unregistering all video devices might result in uvc_delete() being 1869 * called from inside the loop if there's no open file handle. To avoid 1870 * that, increment the refcount before iterating over the streams and 1871 * decrement it when done. 1872 */ 1873 kref_get(&dev->ref); 1874 1875 list_for_each_entry(stream, &dev->streams, list) { 1876 if (!video_is_registered(&stream->vdev)) 1877 continue; 1878 1879 video_unregister_device(&stream->vdev); 1880 1881 uvc_debugfs_cleanup_stream(stream); 1882 } 1883 1884 kref_put(&dev->ref, uvc_delete); 1885 } 1886 1887 static int uvc_register_video(struct uvc_device *dev, 1888 struct uvc_streaming *stream) 1889 { 1890 struct video_device *vdev = &stream->vdev; 1891 int ret; 1892 1893 /* Initialize the video buffers queue. */ 1894 ret = uvc_queue_init(&stream->queue, stream->type, !uvc_no_drop_param); 1895 if (ret) 1896 return ret; 1897 1898 /* Initialize the streaming interface with default streaming 1899 * parameters. 1900 */ 1901 ret = uvc_video_init(stream); 1902 if (ret < 0) { 1903 uvc_printk(KERN_ERR, "Failed to initialize the device " 1904 "(%d).\n", ret); 1905 return ret; 1906 } 1907 1908 uvc_debugfs_init_stream(stream); 1909 1910 /* Register the device with V4L. */ 1911 1912 /* We already hold a reference to dev->udev. The video device will be 1913 * unregistered before the reference is released, so we don't need to 1914 * get another one. 1915 */ 1916 vdev->v4l2_dev = &dev->vdev; 1917 vdev->fops = &uvc_fops; 1918 vdev->ioctl_ops = &uvc_ioctl_ops; 1919 vdev->release = uvc_release; 1920 vdev->prio = &stream->chain->prio; 1921 if (stream->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1922 vdev->vfl_dir = VFL_DIR_TX; 1923 strlcpy(vdev->name, dev->name, sizeof vdev->name); 1924 1925 /* Set the driver data before calling video_register_device, otherwise 1926 * uvc_v4l2_open might race us. 1927 */ 1928 video_set_drvdata(vdev, stream); 1929 1930 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1931 if (ret < 0) { 1932 uvc_printk(KERN_ERR, "Failed to register video device (%d).\n", 1933 ret); 1934 return ret; 1935 } 1936 1937 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1938 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE; 1939 else 1940 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 1941 1942 kref_get(&dev->ref); 1943 return 0; 1944 } 1945 1946 /* 1947 * Register all video devices in all chains. 1948 */ 1949 static int uvc_register_terms(struct uvc_device *dev, 1950 struct uvc_video_chain *chain) 1951 { 1952 struct uvc_streaming *stream; 1953 struct uvc_entity *term; 1954 int ret; 1955 1956 list_for_each_entry(term, &chain->entities, chain) { 1957 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 1958 continue; 1959 1960 stream = uvc_stream_by_id(dev, term->id); 1961 if (stream == NULL) { 1962 uvc_printk(KERN_INFO, "No streaming interface found " 1963 "for terminal %u.", term->id); 1964 continue; 1965 } 1966 1967 stream->chain = chain; 1968 ret = uvc_register_video(dev, stream); 1969 if (ret < 0) 1970 return ret; 1971 1972 term->vdev = &stream->vdev; 1973 } 1974 1975 return 0; 1976 } 1977 1978 static int uvc_register_chains(struct uvc_device *dev) 1979 { 1980 struct uvc_video_chain *chain; 1981 int ret; 1982 1983 list_for_each_entry(chain, &dev->chains, list) { 1984 ret = uvc_register_terms(dev, chain); 1985 if (ret < 0) 1986 return ret; 1987 1988 #ifdef CONFIG_MEDIA_CONTROLLER 1989 ret = uvc_mc_register_entities(chain); 1990 if (ret < 0) { 1991 uvc_printk(KERN_INFO, "Failed to register entites " 1992 "(%d).\n", ret); 1993 } 1994 #endif 1995 } 1996 1997 return 0; 1998 } 1999 2000 /* ------------------------------------------------------------------------ 2001 * USB probe, disconnect, suspend and resume 2002 */ 2003 2004 static int uvc_probe(struct usb_interface *intf, 2005 const struct usb_device_id *id) 2006 { 2007 struct usb_device *udev = interface_to_usbdev(intf); 2008 struct uvc_device *dev; 2009 int function; 2010 int ret; 2011 2012 if (id->idVendor && id->idProduct) 2013 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 2014 "(%04x:%04x)\n", udev->devpath, id->idVendor, 2015 id->idProduct); 2016 else 2017 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 2018 udev->devpath); 2019 2020 /* Allocate memory for the device and initialize it. */ 2021 if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL) 2022 return -ENOMEM; 2023 2024 INIT_LIST_HEAD(&dev->entities); 2025 INIT_LIST_HEAD(&dev->chains); 2026 INIT_LIST_HEAD(&dev->streams); 2027 kref_init(&dev->ref); 2028 atomic_set(&dev->nmappings, 0); 2029 mutex_init(&dev->lock); 2030 2031 dev->udev = usb_get_dev(udev); 2032 dev->intf = usb_get_intf(intf); 2033 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 2034 dev->quirks = (uvc_quirks_param == -1) 2035 ? id->driver_info : uvc_quirks_param; 2036 2037 if (udev->product != NULL) 2038 strlcpy(dev->name, udev->product, sizeof dev->name); 2039 else 2040 snprintf(dev->name, sizeof dev->name, 2041 "UVC Camera (%04x:%04x)", 2042 le16_to_cpu(udev->descriptor.idVendor), 2043 le16_to_cpu(udev->descriptor.idProduct)); 2044 2045 /* 2046 * Add iFunction or iInterface to names when available as additional 2047 * distinguishers between interfaces. iFunction is prioritized over 2048 * iInterface which matches Windows behavior at the point of writing. 2049 */ 2050 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0) 2051 function = intf->intf_assoc->iFunction; 2052 else 2053 function = intf->cur_altsetting->desc.iInterface; 2054 if (function != 0) { 2055 size_t len; 2056 2057 strlcat(dev->name, ": ", sizeof(dev->name)); 2058 len = strlen(dev->name); 2059 usb_string(udev, function, dev->name + len, 2060 sizeof(dev->name) - len); 2061 } 2062 2063 /* Parse the Video Class control descriptor. */ 2064 if (uvc_parse_control(dev) < 0) { 2065 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 2066 "descriptors.\n"); 2067 goto error; 2068 } 2069 2070 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 2071 dev->uvc_version >> 8, dev->uvc_version & 0xff, 2072 udev->product ? udev->product : "<unnamed>", 2073 le16_to_cpu(udev->descriptor.idVendor), 2074 le16_to_cpu(udev->descriptor.idProduct)); 2075 2076 if (dev->quirks != id->driver_info) { 2077 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 2078 "parameter for testing purpose.\n", dev->quirks); 2079 uvc_printk(KERN_INFO, "Please report required quirks to the " 2080 "linux-uvc-devel mailing list.\n"); 2081 } 2082 2083 /* Initialize the media device and register the V4L2 device. */ 2084 #ifdef CONFIG_MEDIA_CONTROLLER 2085 dev->mdev.dev = &intf->dev; 2086 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 2087 if (udev->serial) 2088 strlcpy(dev->mdev.serial, udev->serial, 2089 sizeof(dev->mdev.serial)); 2090 strcpy(dev->mdev.bus_info, udev->devpath); 2091 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 2092 media_device_init(&dev->mdev); 2093 2094 dev->vdev.mdev = &dev->mdev; 2095 #endif 2096 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 2097 goto error; 2098 2099 /* Initialize controls. */ 2100 if (uvc_ctrl_init_device(dev) < 0) 2101 goto error; 2102 2103 /* Scan the device for video chains. */ 2104 if (uvc_scan_device(dev) < 0) 2105 goto error; 2106 2107 /* Register video device nodes. */ 2108 if (uvc_register_chains(dev) < 0) 2109 goto error; 2110 2111 #ifdef CONFIG_MEDIA_CONTROLLER 2112 /* Register the media device node */ 2113 if (media_device_register(&dev->mdev) < 0) 2114 goto error; 2115 #endif 2116 /* Save our data pointer in the interface data. */ 2117 usb_set_intfdata(intf, dev); 2118 2119 /* Initialize the interrupt URB. */ 2120 if ((ret = uvc_status_init(dev)) < 0) { 2121 uvc_printk(KERN_INFO, "Unable to initialize the status " 2122 "endpoint (%d), status interrupt will not be " 2123 "supported.\n", ret); 2124 } 2125 2126 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 2127 usb_enable_autosuspend(udev); 2128 return 0; 2129 2130 error: 2131 uvc_unregister_video(dev); 2132 return -ENODEV; 2133 } 2134 2135 static void uvc_disconnect(struct usb_interface *intf) 2136 { 2137 struct uvc_device *dev = usb_get_intfdata(intf); 2138 2139 /* Set the USB interface data to NULL. This can be done outside the 2140 * lock, as there's no other reader. 2141 */ 2142 usb_set_intfdata(intf, NULL); 2143 2144 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2145 UVC_SC_VIDEOSTREAMING) 2146 return; 2147 2148 uvc_unregister_video(dev); 2149 } 2150 2151 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 2152 { 2153 struct uvc_device *dev = usb_get_intfdata(intf); 2154 struct uvc_streaming *stream; 2155 2156 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 2157 intf->cur_altsetting->desc.bInterfaceNumber); 2158 2159 /* Controls are cached on the fly so they don't need to be saved. */ 2160 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2161 UVC_SC_VIDEOCONTROL) { 2162 mutex_lock(&dev->lock); 2163 if (dev->users) 2164 uvc_status_stop(dev); 2165 mutex_unlock(&dev->lock); 2166 return 0; 2167 } 2168 2169 list_for_each_entry(stream, &dev->streams, list) { 2170 if (stream->intf == intf) 2171 return uvc_video_suspend(stream); 2172 } 2173 2174 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2175 "mismatch.\n"); 2176 return -EINVAL; 2177 } 2178 2179 static int __uvc_resume(struct usb_interface *intf, int reset) 2180 { 2181 struct uvc_device *dev = usb_get_intfdata(intf); 2182 struct uvc_streaming *stream; 2183 int ret = 0; 2184 2185 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2186 intf->cur_altsetting->desc.bInterfaceNumber); 2187 2188 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2189 UVC_SC_VIDEOCONTROL) { 2190 if (reset) { 2191 ret = uvc_ctrl_restore_values(dev); 2192 if (ret < 0) 2193 return ret; 2194 } 2195 2196 mutex_lock(&dev->lock); 2197 if (dev->users) 2198 ret = uvc_status_start(dev, GFP_NOIO); 2199 mutex_unlock(&dev->lock); 2200 2201 return ret; 2202 } 2203 2204 list_for_each_entry(stream, &dev->streams, list) { 2205 if (stream->intf == intf) { 2206 ret = uvc_video_resume(stream, reset); 2207 if (ret < 0) 2208 uvc_queue_streamoff(&stream->queue, 2209 stream->queue.queue.type); 2210 return ret; 2211 } 2212 } 2213 2214 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2215 "mismatch.\n"); 2216 return -EINVAL; 2217 } 2218 2219 static int uvc_resume(struct usb_interface *intf) 2220 { 2221 return __uvc_resume(intf, 0); 2222 } 2223 2224 static int uvc_reset_resume(struct usb_interface *intf) 2225 { 2226 return __uvc_resume(intf, 1); 2227 } 2228 2229 /* ------------------------------------------------------------------------ 2230 * Module parameters 2231 */ 2232 2233 static int uvc_clock_param_get(char *buffer, struct kernel_param *kp) 2234 { 2235 if (uvc_clock_param == CLOCK_MONOTONIC) 2236 return sprintf(buffer, "CLOCK_MONOTONIC"); 2237 else 2238 return sprintf(buffer, "CLOCK_REALTIME"); 2239 } 2240 2241 static int uvc_clock_param_set(const char *val, struct kernel_param *kp) 2242 { 2243 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2244 val += strlen("clock_"); 2245 2246 if (strcasecmp(val, "monotonic") == 0) 2247 uvc_clock_param = CLOCK_MONOTONIC; 2248 else if (strcasecmp(val, "realtime") == 0) 2249 uvc_clock_param = CLOCK_REALTIME; 2250 else 2251 return -EINVAL; 2252 2253 return 0; 2254 } 2255 2256 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2257 &uvc_clock_param, S_IRUGO|S_IWUSR); 2258 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2259 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR); 2260 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); 2261 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2262 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2263 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2264 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2265 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2266 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2267 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2268 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2269 2270 /* ------------------------------------------------------------------------ 2271 * Driver initialization and cleanup 2272 */ 2273 2274 /* 2275 * The Logitech cameras listed below have their interface class set to 2276 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2277 * though they are compliant. 2278 */ 2279 static const struct usb_device_id uvc_ids[] = { 2280 /* LogiLink Wireless Webcam */ 2281 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2282 | USB_DEVICE_ID_MATCH_INT_INFO, 2283 .idVendor = 0x0416, 2284 .idProduct = 0xa91a, 2285 .bInterfaceClass = USB_CLASS_VIDEO, 2286 .bInterfaceSubClass = 1, 2287 .bInterfaceProtocol = 0, 2288 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2289 /* Genius eFace 2025 */ 2290 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2291 | USB_DEVICE_ID_MATCH_INT_INFO, 2292 .idVendor = 0x0458, 2293 .idProduct = 0x706e, 2294 .bInterfaceClass = USB_CLASS_VIDEO, 2295 .bInterfaceSubClass = 1, 2296 .bInterfaceProtocol = 0, 2297 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2298 /* Microsoft Lifecam NX-6000 */ 2299 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2300 | USB_DEVICE_ID_MATCH_INT_INFO, 2301 .idVendor = 0x045e, 2302 .idProduct = 0x00f8, 2303 .bInterfaceClass = USB_CLASS_VIDEO, 2304 .bInterfaceSubClass = 1, 2305 .bInterfaceProtocol = 0, 2306 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2307 /* Microsoft Lifecam NX-3000 */ 2308 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2309 | USB_DEVICE_ID_MATCH_INT_INFO, 2310 .idVendor = 0x045e, 2311 .idProduct = 0x0721, 2312 .bInterfaceClass = USB_CLASS_VIDEO, 2313 .bInterfaceSubClass = 1, 2314 .bInterfaceProtocol = 0, 2315 .driver_info = UVC_QUIRK_PROBE_DEF }, 2316 /* Microsoft Lifecam VX-7000 */ 2317 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2318 | USB_DEVICE_ID_MATCH_INT_INFO, 2319 .idVendor = 0x045e, 2320 .idProduct = 0x0723, 2321 .bInterfaceClass = USB_CLASS_VIDEO, 2322 .bInterfaceSubClass = 1, 2323 .bInterfaceProtocol = 0, 2324 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2325 /* Logitech Quickcam Fusion */ 2326 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2327 | USB_DEVICE_ID_MATCH_INT_INFO, 2328 .idVendor = 0x046d, 2329 .idProduct = 0x08c1, 2330 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2331 .bInterfaceSubClass = 1, 2332 .bInterfaceProtocol = 0 }, 2333 /* Logitech Quickcam Orbit MP */ 2334 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2335 | USB_DEVICE_ID_MATCH_INT_INFO, 2336 .idVendor = 0x046d, 2337 .idProduct = 0x08c2, 2338 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2339 .bInterfaceSubClass = 1, 2340 .bInterfaceProtocol = 0 }, 2341 /* Logitech Quickcam Pro for Notebook */ 2342 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2343 | USB_DEVICE_ID_MATCH_INT_INFO, 2344 .idVendor = 0x046d, 2345 .idProduct = 0x08c3, 2346 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2347 .bInterfaceSubClass = 1, 2348 .bInterfaceProtocol = 0 }, 2349 /* Logitech Quickcam Pro 5000 */ 2350 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2351 | USB_DEVICE_ID_MATCH_INT_INFO, 2352 .idVendor = 0x046d, 2353 .idProduct = 0x08c5, 2354 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2355 .bInterfaceSubClass = 1, 2356 .bInterfaceProtocol = 0 }, 2357 /* Logitech Quickcam OEM Dell Notebook */ 2358 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2359 | USB_DEVICE_ID_MATCH_INT_INFO, 2360 .idVendor = 0x046d, 2361 .idProduct = 0x08c6, 2362 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2363 .bInterfaceSubClass = 1, 2364 .bInterfaceProtocol = 0 }, 2365 /* Logitech Quickcam OEM Cisco VT Camera II */ 2366 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2367 | USB_DEVICE_ID_MATCH_INT_INFO, 2368 .idVendor = 0x046d, 2369 .idProduct = 0x08c7, 2370 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2371 .bInterfaceSubClass = 1, 2372 .bInterfaceProtocol = 0 }, 2373 /* Logitech HD Pro Webcam C920 */ 2374 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2375 | USB_DEVICE_ID_MATCH_INT_INFO, 2376 .idVendor = 0x046d, 2377 .idProduct = 0x082d, 2378 .bInterfaceClass = USB_CLASS_VIDEO, 2379 .bInterfaceSubClass = 1, 2380 .bInterfaceProtocol = 0, 2381 .driver_info = UVC_QUIRK_RESTORE_CTRLS_ON_INIT }, 2382 /* Chicony CNF7129 (Asus EEE 100HE) */ 2383 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2384 | USB_DEVICE_ID_MATCH_INT_INFO, 2385 .idVendor = 0x04f2, 2386 .idProduct = 0xb071, 2387 .bInterfaceClass = USB_CLASS_VIDEO, 2388 .bInterfaceSubClass = 1, 2389 .bInterfaceProtocol = 0, 2390 .driver_info = UVC_QUIRK_RESTRICT_FRAME_RATE }, 2391 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2392 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2393 | USB_DEVICE_ID_MATCH_INT_INFO, 2394 .idVendor = 0x058f, 2395 .idProduct = 0x3820, 2396 .bInterfaceClass = USB_CLASS_VIDEO, 2397 .bInterfaceSubClass = 1, 2398 .bInterfaceProtocol = 0, 2399 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2400 /* Dell XPS m1530 */ 2401 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2402 | USB_DEVICE_ID_MATCH_INT_INFO, 2403 .idVendor = 0x05a9, 2404 .idProduct = 0x2640, 2405 .bInterfaceClass = USB_CLASS_VIDEO, 2406 .bInterfaceSubClass = 1, 2407 .bInterfaceProtocol = 0, 2408 .driver_info = UVC_QUIRK_PROBE_DEF }, 2409 /* Dell SP2008WFP Monitor */ 2410 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2411 | USB_DEVICE_ID_MATCH_INT_INFO, 2412 .idVendor = 0x05a9, 2413 .idProduct = 0x2641, 2414 .bInterfaceClass = USB_CLASS_VIDEO, 2415 .bInterfaceSubClass = 1, 2416 .bInterfaceProtocol = 0, 2417 .driver_info = UVC_QUIRK_PROBE_DEF }, 2418 /* Dell Alienware X51 */ 2419 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2420 | USB_DEVICE_ID_MATCH_INT_INFO, 2421 .idVendor = 0x05a9, 2422 .idProduct = 0x2643, 2423 .bInterfaceClass = USB_CLASS_VIDEO, 2424 .bInterfaceSubClass = 1, 2425 .bInterfaceProtocol = 0, 2426 .driver_info = UVC_QUIRK_PROBE_DEF }, 2427 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2428 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2429 | USB_DEVICE_ID_MATCH_INT_INFO, 2430 .idVendor = 0x05a9, 2431 .idProduct = 0x264a, 2432 .bInterfaceClass = USB_CLASS_VIDEO, 2433 .bInterfaceSubClass = 1, 2434 .bInterfaceProtocol = 0, 2435 .driver_info = UVC_QUIRK_PROBE_DEF }, 2436 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2437 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2438 | USB_DEVICE_ID_MATCH_INT_INFO, 2439 .idVendor = 0x05a9, 2440 .idProduct = 0x7670, 2441 .bInterfaceClass = USB_CLASS_VIDEO, 2442 .bInterfaceSubClass = 1, 2443 .bInterfaceProtocol = 0, 2444 .driver_info = UVC_QUIRK_PROBE_DEF }, 2445 /* Apple Built-In iSight */ 2446 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2447 | USB_DEVICE_ID_MATCH_INT_INFO, 2448 .idVendor = 0x05ac, 2449 .idProduct = 0x8501, 2450 .bInterfaceClass = USB_CLASS_VIDEO, 2451 .bInterfaceSubClass = 1, 2452 .bInterfaceProtocol = 0, 2453 .driver_info = UVC_QUIRK_PROBE_MINMAX 2454 | UVC_QUIRK_BUILTIN_ISIGHT }, 2455 /* Apple Built-In iSight via iBridge */ 2456 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2457 | USB_DEVICE_ID_MATCH_INT_INFO, 2458 .idVendor = 0x05ac, 2459 .idProduct = 0x8600, 2460 .bInterfaceClass = USB_CLASS_VIDEO, 2461 .bInterfaceSubClass = 1, 2462 .bInterfaceProtocol = 0, 2463 .driver_info = UVC_QUIRK_PROBE_DEF }, 2464 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2465 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2466 | USB_DEVICE_ID_MATCH_INT_INFO, 2467 .idVendor = 0x05c8, 2468 .idProduct = 0x0403, 2469 .bInterfaceClass = USB_CLASS_VIDEO, 2470 .bInterfaceSubClass = 1, 2471 .bInterfaceProtocol = 0, 2472 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2473 /* Genesys Logic USB 2.0 PC Camera */ 2474 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2475 | USB_DEVICE_ID_MATCH_INT_INFO, 2476 .idVendor = 0x05e3, 2477 .idProduct = 0x0505, 2478 .bInterfaceClass = USB_CLASS_VIDEO, 2479 .bInterfaceSubClass = 1, 2480 .bInterfaceProtocol = 0, 2481 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2482 /* Hercules Classic Silver */ 2483 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2484 | USB_DEVICE_ID_MATCH_INT_INFO, 2485 .idVendor = 0x06f8, 2486 .idProduct = 0x300c, 2487 .bInterfaceClass = USB_CLASS_VIDEO, 2488 .bInterfaceSubClass = 1, 2489 .bInterfaceProtocol = 0, 2490 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2491 /* ViMicro Vega */ 2492 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2493 | USB_DEVICE_ID_MATCH_INT_INFO, 2494 .idVendor = 0x0ac8, 2495 .idProduct = 0x332d, 2496 .bInterfaceClass = USB_CLASS_VIDEO, 2497 .bInterfaceSubClass = 1, 2498 .bInterfaceProtocol = 0, 2499 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2500 /* ViMicro - Minoru3D */ 2501 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2502 | USB_DEVICE_ID_MATCH_INT_INFO, 2503 .idVendor = 0x0ac8, 2504 .idProduct = 0x3410, 2505 .bInterfaceClass = USB_CLASS_VIDEO, 2506 .bInterfaceSubClass = 1, 2507 .bInterfaceProtocol = 0, 2508 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2509 /* ViMicro Venus - Minoru3D */ 2510 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2511 | USB_DEVICE_ID_MATCH_INT_INFO, 2512 .idVendor = 0x0ac8, 2513 .idProduct = 0x3420, 2514 .bInterfaceClass = USB_CLASS_VIDEO, 2515 .bInterfaceSubClass = 1, 2516 .bInterfaceProtocol = 0, 2517 .driver_info = UVC_QUIRK_FIX_BANDWIDTH }, 2518 /* Ophir Optronics - SPCAM 620U */ 2519 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2520 | USB_DEVICE_ID_MATCH_INT_INFO, 2521 .idVendor = 0x0bd3, 2522 .idProduct = 0x0555, 2523 .bInterfaceClass = USB_CLASS_VIDEO, 2524 .bInterfaceSubClass = 1, 2525 .bInterfaceProtocol = 0, 2526 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2527 /* MT6227 */ 2528 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2529 | USB_DEVICE_ID_MATCH_INT_INFO, 2530 .idVendor = 0x0e8d, 2531 .idProduct = 0x0004, 2532 .bInterfaceClass = USB_CLASS_VIDEO, 2533 .bInterfaceSubClass = 1, 2534 .bInterfaceProtocol = 0, 2535 .driver_info = UVC_QUIRK_PROBE_MINMAX 2536 | UVC_QUIRK_PROBE_DEF }, 2537 /* IMC Networks (Medion Akoya) */ 2538 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2539 | USB_DEVICE_ID_MATCH_INT_INFO, 2540 .idVendor = 0x13d3, 2541 .idProduct = 0x5103, 2542 .bInterfaceClass = USB_CLASS_VIDEO, 2543 .bInterfaceSubClass = 1, 2544 .bInterfaceProtocol = 0, 2545 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2546 /* JMicron USB2.0 XGA WebCam */ 2547 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2548 | USB_DEVICE_ID_MATCH_INT_INFO, 2549 .idVendor = 0x152d, 2550 .idProduct = 0x0310, 2551 .bInterfaceClass = USB_CLASS_VIDEO, 2552 .bInterfaceSubClass = 1, 2553 .bInterfaceProtocol = 0, 2554 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2555 /* Syntek (HP Spartan) */ 2556 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2557 | USB_DEVICE_ID_MATCH_INT_INFO, 2558 .idVendor = 0x174f, 2559 .idProduct = 0x5212, 2560 .bInterfaceClass = USB_CLASS_VIDEO, 2561 .bInterfaceSubClass = 1, 2562 .bInterfaceProtocol = 0, 2563 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2564 /* Syntek (Samsung Q310) */ 2565 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2566 | USB_DEVICE_ID_MATCH_INT_INFO, 2567 .idVendor = 0x174f, 2568 .idProduct = 0x5931, 2569 .bInterfaceClass = USB_CLASS_VIDEO, 2570 .bInterfaceSubClass = 1, 2571 .bInterfaceProtocol = 0, 2572 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2573 /* Syntek (Packard Bell EasyNote MX52 */ 2574 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2575 | USB_DEVICE_ID_MATCH_INT_INFO, 2576 .idVendor = 0x174f, 2577 .idProduct = 0x8a12, 2578 .bInterfaceClass = USB_CLASS_VIDEO, 2579 .bInterfaceSubClass = 1, 2580 .bInterfaceProtocol = 0, 2581 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2582 /* Syntek (Asus F9SG) */ 2583 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2584 | USB_DEVICE_ID_MATCH_INT_INFO, 2585 .idVendor = 0x174f, 2586 .idProduct = 0x8a31, 2587 .bInterfaceClass = USB_CLASS_VIDEO, 2588 .bInterfaceSubClass = 1, 2589 .bInterfaceProtocol = 0, 2590 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2591 /* Syntek (Asus U3S) */ 2592 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2593 | USB_DEVICE_ID_MATCH_INT_INFO, 2594 .idVendor = 0x174f, 2595 .idProduct = 0x8a33, 2596 .bInterfaceClass = USB_CLASS_VIDEO, 2597 .bInterfaceSubClass = 1, 2598 .bInterfaceProtocol = 0, 2599 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2600 /* Syntek (JAOtech Smart Terminal) */ 2601 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2602 | USB_DEVICE_ID_MATCH_INT_INFO, 2603 .idVendor = 0x174f, 2604 .idProduct = 0x8a34, 2605 .bInterfaceClass = USB_CLASS_VIDEO, 2606 .bInterfaceSubClass = 1, 2607 .bInterfaceProtocol = 0, 2608 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2609 /* Miricle 307K */ 2610 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2611 | USB_DEVICE_ID_MATCH_INT_INFO, 2612 .idVendor = 0x17dc, 2613 .idProduct = 0x0202, 2614 .bInterfaceClass = USB_CLASS_VIDEO, 2615 .bInterfaceSubClass = 1, 2616 .bInterfaceProtocol = 0, 2617 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2618 /* Lenovo Thinkpad SL400/SL500 */ 2619 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2620 | USB_DEVICE_ID_MATCH_INT_INFO, 2621 .idVendor = 0x17ef, 2622 .idProduct = 0x480b, 2623 .bInterfaceClass = USB_CLASS_VIDEO, 2624 .bInterfaceSubClass = 1, 2625 .bInterfaceProtocol = 0, 2626 .driver_info = UVC_QUIRK_STREAM_NO_FID }, 2627 /* Aveo Technology USB 2.0 Camera */ 2628 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2629 | USB_DEVICE_ID_MATCH_INT_INFO, 2630 .idVendor = 0x1871, 2631 .idProduct = 0x0306, 2632 .bInterfaceClass = USB_CLASS_VIDEO, 2633 .bInterfaceSubClass = 1, 2634 .bInterfaceProtocol = 0, 2635 .driver_info = UVC_QUIRK_PROBE_MINMAX 2636 | UVC_QUIRK_PROBE_EXTRAFIELDS }, 2637 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */ 2638 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2639 | USB_DEVICE_ID_MATCH_INT_INFO, 2640 .idVendor = 0x1871, 2641 .idProduct = 0x0516, 2642 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2643 .bInterfaceSubClass = 1, 2644 .bInterfaceProtocol = 0 }, 2645 /* Ecamm Pico iMage */ 2646 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2647 | USB_DEVICE_ID_MATCH_INT_INFO, 2648 .idVendor = 0x18cd, 2649 .idProduct = 0xcafe, 2650 .bInterfaceClass = USB_CLASS_VIDEO, 2651 .bInterfaceSubClass = 1, 2652 .bInterfaceProtocol = 0, 2653 .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS }, 2654 /* Manta MM-353 Plako */ 2655 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2656 | USB_DEVICE_ID_MATCH_INT_INFO, 2657 .idVendor = 0x18ec, 2658 .idProduct = 0x3188, 2659 .bInterfaceClass = USB_CLASS_VIDEO, 2660 .bInterfaceSubClass = 1, 2661 .bInterfaceProtocol = 0, 2662 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2663 /* FSC WebCam V30S */ 2664 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2665 | USB_DEVICE_ID_MATCH_INT_INFO, 2666 .idVendor = 0x18ec, 2667 .idProduct = 0x3288, 2668 .bInterfaceClass = USB_CLASS_VIDEO, 2669 .bInterfaceSubClass = 1, 2670 .bInterfaceProtocol = 0, 2671 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2672 /* Arkmicro unbranded */ 2673 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2674 | USB_DEVICE_ID_MATCH_INT_INFO, 2675 .idVendor = 0x18ec, 2676 .idProduct = 0x3290, 2677 .bInterfaceClass = USB_CLASS_VIDEO, 2678 .bInterfaceSubClass = 1, 2679 .bInterfaceProtocol = 0, 2680 .driver_info = UVC_QUIRK_PROBE_DEF }, 2681 /* The Imaging Source USB CCD cameras */ 2682 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2683 | USB_DEVICE_ID_MATCH_INT_INFO, 2684 .idVendor = 0x199e, 2685 .idProduct = 0x8102, 2686 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2687 .bInterfaceSubClass = 1, 2688 .bInterfaceProtocol = 0 }, 2689 /* Bodelin ProScopeHR */ 2690 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2691 | USB_DEVICE_ID_MATCH_DEV_HI 2692 | USB_DEVICE_ID_MATCH_INT_INFO, 2693 .idVendor = 0x19ab, 2694 .idProduct = 0x1000, 2695 .bcdDevice_hi = 0x0126, 2696 .bInterfaceClass = USB_CLASS_VIDEO, 2697 .bInterfaceSubClass = 1, 2698 .bInterfaceProtocol = 0, 2699 .driver_info = UVC_QUIRK_STATUS_INTERVAL }, 2700 /* MSI StarCam 370i */ 2701 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2702 | USB_DEVICE_ID_MATCH_INT_INFO, 2703 .idVendor = 0x1b3b, 2704 .idProduct = 0x2951, 2705 .bInterfaceClass = USB_CLASS_VIDEO, 2706 .bInterfaceSubClass = 1, 2707 .bInterfaceProtocol = 0, 2708 .driver_info = UVC_QUIRK_PROBE_MINMAX }, 2709 /* SiGma Micro USB Web Camera */ 2710 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2711 | USB_DEVICE_ID_MATCH_INT_INFO, 2712 .idVendor = 0x1c4f, 2713 .idProduct = 0x3000, 2714 .bInterfaceClass = USB_CLASS_VIDEO, 2715 .bInterfaceSubClass = 1, 2716 .bInterfaceProtocol = 0, 2717 .driver_info = UVC_QUIRK_PROBE_MINMAX 2718 | UVC_QUIRK_IGNORE_SELECTOR_UNIT }, 2719 /* Oculus VR Positional Tracker DK2 */ 2720 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2721 | USB_DEVICE_ID_MATCH_INT_INFO, 2722 .idVendor = 0x2833, 2723 .idProduct = 0x0201, 2724 .bInterfaceClass = USB_CLASS_VIDEO, 2725 .bInterfaceSubClass = 1, 2726 .bInterfaceProtocol = 0, 2727 .driver_info = UVC_QUIRK_FORCE_Y8 }, 2728 /* Oculus VR Rift Sensor */ 2729 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2730 | USB_DEVICE_ID_MATCH_INT_INFO, 2731 .idVendor = 0x2833, 2732 .idProduct = 0x0211, 2733 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2734 .bInterfaceSubClass = 1, 2735 .bInterfaceProtocol = 0, 2736 .driver_info = UVC_QUIRK_FORCE_Y8 }, 2737 /* Generic USB Video Class */ 2738 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) }, 2739 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) }, 2740 {} 2741 }; 2742 2743 MODULE_DEVICE_TABLE(usb, uvc_ids); 2744 2745 struct uvc_driver uvc_driver = { 2746 .driver = { 2747 .name = "uvcvideo", 2748 .probe = uvc_probe, 2749 .disconnect = uvc_disconnect, 2750 .suspend = uvc_suspend, 2751 .resume = uvc_resume, 2752 .reset_resume = uvc_reset_resume, 2753 .id_table = uvc_ids, 2754 .supports_autosuspend = 1, 2755 }, 2756 }; 2757 2758 static int __init uvc_init(void) 2759 { 2760 int ret; 2761 2762 uvc_debugfs_init(); 2763 2764 ret = usb_register(&uvc_driver.driver); 2765 if (ret < 0) { 2766 uvc_debugfs_cleanup(); 2767 return ret; 2768 } 2769 2770 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2771 return 0; 2772 } 2773 2774 static void __exit uvc_cleanup(void) 2775 { 2776 usb_deregister(&uvc_driver.driver); 2777 uvc_debugfs_cleanup(); 2778 } 2779 2780 module_init(uvc_init); 2781 module_exit(uvc_cleanup); 2782 2783 MODULE_AUTHOR(DRIVER_AUTHOR); 2784 MODULE_DESCRIPTION(DRIVER_DESC); 2785 MODULE_LICENSE("GPL"); 2786 MODULE_VERSION(DRIVER_VERSION); 2787 2788