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 #include <media/v4l2-ioctl.h> 28 29 #include "uvcvideo.h" 30 31 #define DRIVER_AUTHOR "Laurent Pinchart " \ 32 "<laurent.pinchart@ideasonboard.com>" 33 #define DRIVER_DESC "USB Video Class driver" 34 35 unsigned int uvc_clock_param = CLOCK_MONOTONIC; 36 unsigned int uvc_hw_timestamps_param; 37 unsigned int uvc_no_drop_param; 38 static unsigned int uvc_quirks_param = -1; 39 unsigned int uvc_trace_param; 40 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 41 42 /* ------------------------------------------------------------------------ 43 * Video formats 44 */ 45 46 static struct uvc_format_desc uvc_fmts[] = { 47 { 48 .name = "YUV 4:2:2 (YUYV)", 49 .guid = UVC_GUID_FORMAT_YUY2, 50 .fcc = V4L2_PIX_FMT_YUYV, 51 }, 52 { 53 .name = "YUV 4:2:2 (YUYV)", 54 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 55 .fcc = V4L2_PIX_FMT_YUYV, 56 }, 57 { 58 .name = "YUV 4:2:0 (NV12)", 59 .guid = UVC_GUID_FORMAT_NV12, 60 .fcc = V4L2_PIX_FMT_NV12, 61 }, 62 { 63 .name = "MJPEG", 64 .guid = UVC_GUID_FORMAT_MJPEG, 65 .fcc = V4L2_PIX_FMT_MJPEG, 66 }, 67 { 68 .name = "YVU 4:2:0 (YV12)", 69 .guid = UVC_GUID_FORMAT_YV12, 70 .fcc = V4L2_PIX_FMT_YVU420, 71 }, 72 { 73 .name = "YUV 4:2:0 (I420)", 74 .guid = UVC_GUID_FORMAT_I420, 75 .fcc = V4L2_PIX_FMT_YUV420, 76 }, 77 { 78 .name = "YUV 4:2:0 (M420)", 79 .guid = UVC_GUID_FORMAT_M420, 80 .fcc = V4L2_PIX_FMT_M420, 81 }, 82 { 83 .name = "YUV 4:2:2 (UYVY)", 84 .guid = UVC_GUID_FORMAT_UYVY, 85 .fcc = V4L2_PIX_FMT_UYVY, 86 }, 87 { 88 .name = "Greyscale 8-bit (Y800)", 89 .guid = UVC_GUID_FORMAT_Y800, 90 .fcc = V4L2_PIX_FMT_GREY, 91 }, 92 { 93 .name = "Greyscale 8-bit (Y8 )", 94 .guid = UVC_GUID_FORMAT_Y8, 95 .fcc = V4L2_PIX_FMT_GREY, 96 }, 97 { 98 .name = "Greyscale 8-bit (D3DFMT_L8)", 99 .guid = UVC_GUID_FORMAT_D3DFMT_L8, 100 .fcc = V4L2_PIX_FMT_GREY, 101 }, 102 { 103 .name = "IR 8-bit (L8_IR)", 104 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR, 105 .fcc = V4L2_PIX_FMT_GREY, 106 }, 107 { 108 .name = "Greyscale 10-bit (Y10 )", 109 .guid = UVC_GUID_FORMAT_Y10, 110 .fcc = V4L2_PIX_FMT_Y10, 111 }, 112 { 113 .name = "Greyscale 12-bit (Y12 )", 114 .guid = UVC_GUID_FORMAT_Y12, 115 .fcc = V4L2_PIX_FMT_Y12, 116 }, 117 { 118 .name = "Greyscale 16-bit (Y16 )", 119 .guid = UVC_GUID_FORMAT_Y16, 120 .fcc = V4L2_PIX_FMT_Y16, 121 }, 122 { 123 .name = "BGGR Bayer (BY8 )", 124 .guid = UVC_GUID_FORMAT_BY8, 125 .fcc = V4L2_PIX_FMT_SBGGR8, 126 }, 127 { 128 .name = "BGGR Bayer (BA81)", 129 .guid = UVC_GUID_FORMAT_BA81, 130 .fcc = V4L2_PIX_FMT_SBGGR8, 131 }, 132 { 133 .name = "GBRG Bayer (GBRG)", 134 .guid = UVC_GUID_FORMAT_GBRG, 135 .fcc = V4L2_PIX_FMT_SGBRG8, 136 }, 137 { 138 .name = "GRBG Bayer (GRBG)", 139 .guid = UVC_GUID_FORMAT_GRBG, 140 .fcc = V4L2_PIX_FMT_SGRBG8, 141 }, 142 { 143 .name = "RGGB Bayer (RGGB)", 144 .guid = UVC_GUID_FORMAT_RGGB, 145 .fcc = V4L2_PIX_FMT_SRGGB8, 146 }, 147 { 148 .name = "RGB565", 149 .guid = UVC_GUID_FORMAT_RGBP, 150 .fcc = V4L2_PIX_FMT_RGB565, 151 }, 152 { 153 .name = "BGR 8:8:8 (BGR3)", 154 .guid = UVC_GUID_FORMAT_BGR3, 155 .fcc = V4L2_PIX_FMT_BGR24, 156 }, 157 { 158 .name = "H.264", 159 .guid = UVC_GUID_FORMAT_H264, 160 .fcc = V4L2_PIX_FMT_H264, 161 }, 162 { 163 .name = "Greyscale 8 L/R (Y8I)", 164 .guid = UVC_GUID_FORMAT_Y8I, 165 .fcc = V4L2_PIX_FMT_Y8I, 166 }, 167 { 168 .name = "Greyscale 12 L/R (Y12I)", 169 .guid = UVC_GUID_FORMAT_Y12I, 170 .fcc = V4L2_PIX_FMT_Y12I, 171 }, 172 { 173 .name = "Depth data 16-bit (Z16)", 174 .guid = UVC_GUID_FORMAT_Z16, 175 .fcc = V4L2_PIX_FMT_Z16, 176 }, 177 { 178 .name = "Bayer 10-bit (SRGGB10P)", 179 .guid = UVC_GUID_FORMAT_RW10, 180 .fcc = V4L2_PIX_FMT_SRGGB10P, 181 }, 182 { 183 .name = "Bayer 16-bit (SBGGR16)", 184 .guid = UVC_GUID_FORMAT_BG16, 185 .fcc = V4L2_PIX_FMT_SBGGR16, 186 }, 187 { 188 .name = "Bayer 16-bit (SGBRG16)", 189 .guid = UVC_GUID_FORMAT_GB16, 190 .fcc = V4L2_PIX_FMT_SGBRG16, 191 }, 192 { 193 .name = "Bayer 16-bit (SRGGB16)", 194 .guid = UVC_GUID_FORMAT_RG16, 195 .fcc = V4L2_PIX_FMT_SRGGB16, 196 }, 197 { 198 .name = "Bayer 16-bit (SGRBG16)", 199 .guid = UVC_GUID_FORMAT_GR16, 200 .fcc = V4L2_PIX_FMT_SGRBG16, 201 }, 202 { 203 .name = "Depth data 16-bit (Z16)", 204 .guid = UVC_GUID_FORMAT_INVZ, 205 .fcc = V4L2_PIX_FMT_Z16, 206 }, 207 { 208 .name = "Greyscale 10-bit (Y10 )", 209 .guid = UVC_GUID_FORMAT_INVI, 210 .fcc = V4L2_PIX_FMT_Y10, 211 }, 212 { 213 .name = "IR:Depth 26-bit (INZI)", 214 .guid = UVC_GUID_FORMAT_INZI, 215 .fcc = V4L2_PIX_FMT_INZI, 216 }, 217 }; 218 219 /* ------------------------------------------------------------------------ 220 * Utility functions 221 */ 222 223 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 224 u8 epaddr) 225 { 226 struct usb_host_endpoint *ep; 227 unsigned int i; 228 229 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 230 ep = &alts->endpoint[i]; 231 if (ep->desc.bEndpointAddress == epaddr) 232 return ep; 233 } 234 235 return NULL; 236 } 237 238 static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16]) 239 { 240 unsigned int len = ARRAY_SIZE(uvc_fmts); 241 unsigned int i; 242 243 for (i = 0; i < len; ++i) { 244 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) 245 return &uvc_fmts[i]; 246 } 247 248 return NULL; 249 } 250 251 static u32 uvc_colorspace(const u8 primaries) 252 { 253 static const u8 colorprimaries[] = { 254 0, 255 V4L2_COLORSPACE_SRGB, 256 V4L2_COLORSPACE_470_SYSTEM_M, 257 V4L2_COLORSPACE_470_SYSTEM_BG, 258 V4L2_COLORSPACE_SMPTE170M, 259 V4L2_COLORSPACE_SMPTE240M, 260 }; 261 262 if (primaries < ARRAY_SIZE(colorprimaries)) 263 return colorprimaries[primaries]; 264 265 return 0; 266 } 267 268 /* Simplify a fraction using a simple continued fraction decomposition. The 269 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 270 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 271 * arbitrary parameters to remove non-significative terms from the simple 272 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 273 * respectively seems to give nice results. 274 */ 275 void uvc_simplify_fraction(u32 *numerator, u32 *denominator, 276 unsigned int n_terms, unsigned int threshold) 277 { 278 u32 *an; 279 u32 x, y, r; 280 unsigned int i, n; 281 282 an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); 283 if (an == NULL) 284 return; 285 286 /* Convert the fraction to a simple continued fraction. See 287 * http://mathforum.org/dr.math/faq/faq.fractions.html 288 * Stop if the current term is bigger than or equal to the given 289 * threshold. 290 */ 291 x = *numerator; 292 y = *denominator; 293 294 for (n = 0; n < n_terms && y != 0; ++n) { 295 an[n] = x / y; 296 if (an[n] >= threshold) { 297 if (n < 2) 298 n++; 299 break; 300 } 301 302 r = x - an[n] * y; 303 x = y; 304 y = r; 305 } 306 307 /* Expand the simple continued fraction back to an integer fraction. */ 308 x = 0; 309 y = 1; 310 311 for (i = n; i > 0; --i) { 312 r = y; 313 y = an[i-1] * y + x; 314 x = r; 315 } 316 317 *numerator = y; 318 *denominator = x; 319 kfree(an); 320 } 321 322 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is 323 * to compute numerator / denominator * 10000000 using 32 bit fixed point 324 * arithmetic only. 325 */ 326 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator) 327 { 328 u32 multiplier; 329 330 /* Saturate the result if the operation would overflow. */ 331 if (denominator == 0 || 332 numerator/denominator >= ((u32)-1)/10000000) 333 return (u32)-1; 334 335 /* Divide both the denominator and the multiplier by two until 336 * numerator * multiplier doesn't overflow. If anyone knows a better 337 * algorithm please let me know. 338 */ 339 multiplier = 10000000; 340 while (numerator > ((u32)-1)/multiplier) { 341 multiplier /= 2; 342 denominator /= 2; 343 } 344 345 return denominator ? numerator * multiplier / denominator : 0; 346 } 347 348 /* ------------------------------------------------------------------------ 349 * Terminal and unit management 350 */ 351 352 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 353 { 354 struct uvc_entity *entity; 355 356 list_for_each_entry(entity, &dev->entities, list) { 357 if (entity->id == id) 358 return entity; 359 } 360 361 return NULL; 362 } 363 364 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 365 int id, struct uvc_entity *entity) 366 { 367 unsigned int i; 368 369 if (entity == NULL) 370 entity = list_entry(&dev->entities, struct uvc_entity, list); 371 372 list_for_each_entry_continue(entity, &dev->entities, list) { 373 for (i = 0; i < entity->bNrInPins; ++i) 374 if (entity->baSourceID[i] == id) 375 return entity; 376 } 377 378 return NULL; 379 } 380 381 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 382 { 383 struct uvc_streaming *stream; 384 385 list_for_each_entry(stream, &dev->streams, list) { 386 if (stream->header.bTerminalLink == id) 387 return stream; 388 } 389 390 return NULL; 391 } 392 393 /* ------------------------------------------------------------------------ 394 * Descriptors parsing 395 */ 396 397 static int uvc_parse_format(struct uvc_device *dev, 398 struct uvc_streaming *streaming, struct uvc_format *format, 399 u32 **intervals, unsigned char *buffer, int buflen) 400 { 401 struct usb_interface *intf = streaming->intf; 402 struct usb_host_interface *alts = intf->cur_altsetting; 403 struct uvc_format_desc *fmtdesc; 404 struct uvc_frame *frame; 405 const unsigned char *start = buffer; 406 unsigned int width_multiplier = 1; 407 unsigned int interval; 408 unsigned int i, n; 409 u8 ftype; 410 411 format->type = buffer[2]; 412 format->index = buffer[3]; 413 414 switch (buffer[2]) { 415 case UVC_VS_FORMAT_UNCOMPRESSED: 416 case UVC_VS_FORMAT_FRAME_BASED: 417 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 418 if (buflen < n) { 419 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 420 "interface %d FORMAT error\n", 421 dev->udev->devnum, 422 alts->desc.bInterfaceNumber); 423 return -EINVAL; 424 } 425 426 /* Find the format descriptor from its GUID. */ 427 fmtdesc = uvc_format_by_guid(&buffer[5]); 428 429 if (fmtdesc != NULL) { 430 strlcpy(format->name, fmtdesc->name, 431 sizeof(format->name)); 432 format->fcc = fmtdesc->fcc; 433 } else { 434 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 435 &buffer[5]); 436 snprintf(format->name, sizeof(format->name), "%pUl\n", 437 &buffer[5]); 438 format->fcc = 0; 439 } 440 441 format->bpp = buffer[21]; 442 443 /* Some devices report a format that doesn't match what they 444 * really send. 445 */ 446 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 447 if (format->fcc == V4L2_PIX_FMT_YUYV) { 448 strlcpy(format->name, "Greyscale 8-bit (Y8 )", 449 sizeof(format->name)); 450 format->fcc = V4L2_PIX_FMT_GREY; 451 format->bpp = 8; 452 width_multiplier = 2; 453 } 454 } 455 456 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 457 ftype = UVC_VS_FRAME_UNCOMPRESSED; 458 } else { 459 ftype = UVC_VS_FRAME_FRAME_BASED; 460 if (buffer[27]) 461 format->flags = UVC_FMT_FLAG_COMPRESSED; 462 } 463 break; 464 465 case UVC_VS_FORMAT_MJPEG: 466 if (buflen < 11) { 467 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 468 "interface %d FORMAT error\n", 469 dev->udev->devnum, 470 alts->desc.bInterfaceNumber); 471 return -EINVAL; 472 } 473 474 strlcpy(format->name, "MJPEG", sizeof(format->name)); 475 format->fcc = V4L2_PIX_FMT_MJPEG; 476 format->flags = UVC_FMT_FLAG_COMPRESSED; 477 format->bpp = 0; 478 ftype = UVC_VS_FRAME_MJPEG; 479 break; 480 481 case UVC_VS_FORMAT_DV: 482 if (buflen < 9) { 483 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 484 "interface %d FORMAT error\n", 485 dev->udev->devnum, 486 alts->desc.bInterfaceNumber); 487 return -EINVAL; 488 } 489 490 switch (buffer[8] & 0x7f) { 491 case 0: 492 strlcpy(format->name, "SD-DV", sizeof(format->name)); 493 break; 494 case 1: 495 strlcpy(format->name, "SDL-DV", sizeof(format->name)); 496 break; 497 case 2: 498 strlcpy(format->name, "HD-DV", sizeof(format->name)); 499 break; 500 default: 501 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 502 "interface %d: unknown DV format %u\n", 503 dev->udev->devnum, 504 alts->desc.bInterfaceNumber, buffer[8]); 505 return -EINVAL; 506 } 507 508 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 509 sizeof(format->name)); 510 511 format->fcc = V4L2_PIX_FMT_DV; 512 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 513 format->bpp = 0; 514 ftype = 0; 515 516 /* Create a dummy frame descriptor. */ 517 frame = &format->frame[0]; 518 memset(&format->frame[0], 0, sizeof(format->frame[0])); 519 frame->bFrameIntervalType = 1; 520 frame->dwDefaultFrameInterval = 1; 521 frame->dwFrameInterval = *intervals; 522 *(*intervals)++ = 1; 523 format->nframes = 1; 524 break; 525 526 case UVC_VS_FORMAT_MPEG2TS: 527 case UVC_VS_FORMAT_STREAM_BASED: 528 /* Not supported yet. */ 529 default: 530 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 531 "interface %d unsupported format %u\n", 532 dev->udev->devnum, alts->desc.bInterfaceNumber, 533 buffer[2]); 534 return -EINVAL; 535 } 536 537 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 538 539 buflen -= buffer[0]; 540 buffer += buffer[0]; 541 542 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 543 * based formats have frame descriptors. 544 */ 545 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 546 buffer[2] == ftype) { 547 frame = &format->frame[format->nframes]; 548 if (ftype != UVC_VS_FRAME_FRAME_BASED) 549 n = buflen > 25 ? buffer[25] : 0; 550 else 551 n = buflen > 21 ? buffer[21] : 0; 552 553 n = n ? n : 3; 554 555 if (buflen < 26 + 4*n) { 556 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 557 "interface %d FRAME error\n", dev->udev->devnum, 558 alts->desc.bInterfaceNumber); 559 return -EINVAL; 560 } 561 562 frame->bFrameIndex = buffer[3]; 563 frame->bmCapabilities = buffer[4]; 564 frame->wWidth = get_unaligned_le16(&buffer[5]) 565 * width_multiplier; 566 frame->wHeight = get_unaligned_le16(&buffer[7]); 567 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 568 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 569 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 570 frame->dwMaxVideoFrameBufferSize = 571 get_unaligned_le32(&buffer[17]); 572 frame->dwDefaultFrameInterval = 573 get_unaligned_le32(&buffer[21]); 574 frame->bFrameIntervalType = buffer[25]; 575 } else { 576 frame->dwMaxVideoFrameBufferSize = 0; 577 frame->dwDefaultFrameInterval = 578 get_unaligned_le32(&buffer[17]); 579 frame->bFrameIntervalType = buffer[21]; 580 } 581 frame->dwFrameInterval = *intervals; 582 583 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 584 * completely. Observed behaviours range from setting the 585 * value to 1.1x the actual frame size to hardwiring the 586 * 16 low bits to 0. This results in a higher than necessary 587 * memory usage as well as a wrong image size information. For 588 * uncompressed formats this can be fixed by computing the 589 * value from the frame size. 590 */ 591 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 592 frame->dwMaxVideoFrameBufferSize = format->bpp 593 * frame->wWidth * frame->wHeight / 8; 594 595 /* Some bogus devices report dwMinFrameInterval equal to 596 * dwMaxFrameInterval and have dwFrameIntervalStep set to 597 * zero. Setting all null intervals to 1 fixes the problem and 598 * some other divisions by zero that could happen. 599 */ 600 for (i = 0; i < n; ++i) { 601 interval = get_unaligned_le32(&buffer[26+4*i]); 602 *(*intervals)++ = interval ? interval : 1; 603 } 604 605 /* Make sure that the default frame interval stays between 606 * the boundaries. 607 */ 608 n -= frame->bFrameIntervalType ? 1 : 2; 609 frame->dwDefaultFrameInterval = 610 min(frame->dwFrameInterval[n], 611 max(frame->dwFrameInterval[0], 612 frame->dwDefaultFrameInterval)); 613 614 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 615 frame->bFrameIntervalType = 1; 616 frame->dwFrameInterval[0] = 617 frame->dwDefaultFrameInterval; 618 } 619 620 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 621 frame->wWidth, frame->wHeight, 622 10000000/frame->dwDefaultFrameInterval, 623 (100000000/frame->dwDefaultFrameInterval)%10); 624 625 format->nframes++; 626 buflen -= buffer[0]; 627 buffer += buffer[0]; 628 } 629 630 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 631 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 632 buflen -= buffer[0]; 633 buffer += buffer[0]; 634 } 635 636 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 637 buffer[2] == UVC_VS_COLORFORMAT) { 638 if (buflen < 6) { 639 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 640 "interface %d COLORFORMAT error\n", 641 dev->udev->devnum, 642 alts->desc.bInterfaceNumber); 643 return -EINVAL; 644 } 645 646 format->colorspace = uvc_colorspace(buffer[3]); 647 648 buflen -= buffer[0]; 649 buffer += buffer[0]; 650 } 651 652 return buffer - start; 653 } 654 655 static int uvc_parse_streaming(struct uvc_device *dev, 656 struct usb_interface *intf) 657 { 658 struct uvc_streaming *streaming = NULL; 659 struct uvc_format *format; 660 struct uvc_frame *frame; 661 struct usb_host_interface *alts = &intf->altsetting[0]; 662 unsigned char *_buffer, *buffer = alts->extra; 663 int _buflen, buflen = alts->extralen; 664 unsigned int nformats = 0, nframes = 0, nintervals = 0; 665 unsigned int size, i, n, p; 666 u32 *interval; 667 u16 psize; 668 int ret = -EINVAL; 669 670 if (intf->cur_altsetting->desc.bInterfaceSubClass 671 != UVC_SC_VIDEOSTREAMING) { 672 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 673 "video streaming interface\n", dev->udev->devnum, 674 intf->altsetting[0].desc.bInterfaceNumber); 675 return -EINVAL; 676 } 677 678 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 679 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 680 "claimed\n", dev->udev->devnum, 681 intf->altsetting[0].desc.bInterfaceNumber); 682 return -EINVAL; 683 } 684 685 streaming = kzalloc(sizeof(*streaming), GFP_KERNEL); 686 if (streaming == NULL) { 687 usb_driver_release_interface(&uvc_driver.driver, intf); 688 return -EINVAL; 689 } 690 691 mutex_init(&streaming->mutex); 692 streaming->dev = dev; 693 streaming->intf = usb_get_intf(intf); 694 streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 695 696 /* The Pico iMage webcam has its class-specific interface descriptors 697 * after the endpoint descriptors. 698 */ 699 if (buflen == 0) { 700 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 701 struct usb_host_endpoint *ep = &alts->endpoint[i]; 702 703 if (ep->extralen == 0) 704 continue; 705 706 if (ep->extralen > 2 && 707 ep->extra[1] == USB_DT_CS_INTERFACE) { 708 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 709 "from endpoint %u.\n", i); 710 buffer = alts->endpoint[i].extra; 711 buflen = alts->endpoint[i].extralen; 712 break; 713 } 714 } 715 } 716 717 /* Skip the standard interface descriptors. */ 718 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 719 buflen -= buffer[0]; 720 buffer += buffer[0]; 721 } 722 723 if (buflen <= 2) { 724 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 725 "interface descriptors found.\n"); 726 goto error; 727 } 728 729 /* Parse the header descriptor. */ 730 switch (buffer[2]) { 731 case UVC_VS_OUTPUT_HEADER: 732 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 733 size = 9; 734 break; 735 736 case UVC_VS_INPUT_HEADER: 737 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 738 size = 13; 739 break; 740 741 default: 742 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 743 "%d HEADER descriptor not found.\n", dev->udev->devnum, 744 alts->desc.bInterfaceNumber); 745 goto error; 746 } 747 748 p = buflen >= 4 ? buffer[3] : 0; 749 n = buflen >= size ? buffer[size-1] : 0; 750 751 if (buflen < size + p*n) { 752 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 753 "interface %d HEADER descriptor is invalid.\n", 754 dev->udev->devnum, alts->desc.bInterfaceNumber); 755 goto error; 756 } 757 758 streaming->header.bNumFormats = p; 759 streaming->header.bEndpointAddress = buffer[6]; 760 if (buffer[2] == UVC_VS_INPUT_HEADER) { 761 streaming->header.bmInfo = buffer[7]; 762 streaming->header.bTerminalLink = buffer[8]; 763 streaming->header.bStillCaptureMethod = buffer[9]; 764 streaming->header.bTriggerSupport = buffer[10]; 765 streaming->header.bTriggerUsage = buffer[11]; 766 } else { 767 streaming->header.bTerminalLink = buffer[7]; 768 } 769 streaming->header.bControlSize = n; 770 771 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 772 GFP_KERNEL); 773 if (streaming->header.bmaControls == NULL) { 774 ret = -ENOMEM; 775 goto error; 776 } 777 778 buflen -= buffer[0]; 779 buffer += buffer[0]; 780 781 _buffer = buffer; 782 _buflen = buflen; 783 784 /* Count the format and frame descriptors. */ 785 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 786 switch (_buffer[2]) { 787 case UVC_VS_FORMAT_UNCOMPRESSED: 788 case UVC_VS_FORMAT_MJPEG: 789 case UVC_VS_FORMAT_FRAME_BASED: 790 nformats++; 791 break; 792 793 case UVC_VS_FORMAT_DV: 794 /* DV format has no frame descriptor. We will create a 795 * dummy frame descriptor with a dummy frame interval. 796 */ 797 nformats++; 798 nframes++; 799 nintervals++; 800 break; 801 802 case UVC_VS_FORMAT_MPEG2TS: 803 case UVC_VS_FORMAT_STREAM_BASED: 804 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 805 "interface %d FORMAT %u is not supported.\n", 806 dev->udev->devnum, 807 alts->desc.bInterfaceNumber, _buffer[2]); 808 break; 809 810 case UVC_VS_FRAME_UNCOMPRESSED: 811 case UVC_VS_FRAME_MJPEG: 812 nframes++; 813 if (_buflen > 25) 814 nintervals += _buffer[25] ? _buffer[25] : 3; 815 break; 816 817 case UVC_VS_FRAME_FRAME_BASED: 818 nframes++; 819 if (_buflen > 21) 820 nintervals += _buffer[21] ? _buffer[21] : 3; 821 break; 822 } 823 824 _buflen -= _buffer[0]; 825 _buffer += _buffer[0]; 826 } 827 828 if (nformats == 0) { 829 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 830 "%d has no supported formats defined.\n", 831 dev->udev->devnum, alts->desc.bInterfaceNumber); 832 goto error; 833 } 834 835 size = nformats * sizeof(*format) + nframes * sizeof(*frame) 836 + nintervals * sizeof(*interval); 837 format = kzalloc(size, GFP_KERNEL); 838 if (format == NULL) { 839 ret = -ENOMEM; 840 goto error; 841 } 842 843 frame = (struct uvc_frame *)&format[nformats]; 844 interval = (u32 *)&frame[nframes]; 845 846 streaming->format = format; 847 streaming->nformats = nformats; 848 849 /* Parse the format descriptors. */ 850 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 851 switch (buffer[2]) { 852 case UVC_VS_FORMAT_UNCOMPRESSED: 853 case UVC_VS_FORMAT_MJPEG: 854 case UVC_VS_FORMAT_DV: 855 case UVC_VS_FORMAT_FRAME_BASED: 856 format->frame = frame; 857 ret = uvc_parse_format(dev, streaming, format, 858 &interval, buffer, buflen); 859 if (ret < 0) 860 goto error; 861 862 frame += format->nframes; 863 format++; 864 865 buflen -= ret; 866 buffer += ret; 867 continue; 868 869 default: 870 break; 871 } 872 873 buflen -= buffer[0]; 874 buffer += buffer[0]; 875 } 876 877 if (buflen) 878 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 879 "%d has %u bytes of trailing descriptor garbage.\n", 880 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 881 882 /* Parse the alternate settings to find the maximum bandwidth. */ 883 for (i = 0; i < intf->num_altsetting; ++i) { 884 struct usb_host_endpoint *ep; 885 alts = &intf->altsetting[i]; 886 ep = uvc_find_endpoint(alts, 887 streaming->header.bEndpointAddress); 888 if (ep == NULL) 889 continue; 890 891 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 892 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 893 if (psize > streaming->maxpsize) 894 streaming->maxpsize = psize; 895 } 896 897 list_add_tail(&streaming->list, &dev->streams); 898 return 0; 899 900 error: 901 usb_driver_release_interface(&uvc_driver.driver, intf); 902 usb_put_intf(intf); 903 kfree(streaming->format); 904 kfree(streaming->header.bmaControls); 905 kfree(streaming); 906 return ret; 907 } 908 909 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 910 unsigned int num_pads, unsigned int extra_size) 911 { 912 struct uvc_entity *entity; 913 unsigned int num_inputs; 914 unsigned int size; 915 unsigned int i; 916 917 extra_size = ALIGN(extra_size, sizeof(*entity->pads)); 918 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 919 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 920 + num_inputs; 921 entity = kzalloc(size, GFP_KERNEL); 922 if (entity == NULL) 923 return NULL; 924 925 entity->id = id; 926 entity->type = type; 927 928 entity->num_links = 0; 929 entity->num_pads = num_pads; 930 entity->pads = ((void *)(entity + 1)) + extra_size; 931 932 for (i = 0; i < num_inputs; ++i) 933 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 934 if (!UVC_ENTITY_IS_OTERM(entity)) 935 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 936 937 entity->bNrInPins = num_inputs; 938 entity->baSourceID = (u8 *)(&entity->pads[num_pads]); 939 940 return entity; 941 } 942 943 /* Parse vendor-specific extensions. */ 944 static int uvc_parse_vendor_control(struct uvc_device *dev, 945 const unsigned char *buffer, int buflen) 946 { 947 struct usb_device *udev = dev->udev; 948 struct usb_host_interface *alts = dev->intf->cur_altsetting; 949 struct uvc_entity *unit; 950 unsigned int n, p; 951 int handled = 0; 952 953 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 954 case 0x046d: /* Logitech */ 955 if (buffer[1] != 0x41 || buffer[2] != 0x01) 956 break; 957 958 /* Logitech implements several vendor specific functions 959 * through vendor specific extension units (LXU). 960 * 961 * The LXU descriptors are similar to XU descriptors 962 * (see "USB Device Video Class for Video Devices", section 963 * 3.7.2.6 "Extension Unit Descriptor") with the following 964 * differences: 965 * 966 * ---------------------------------------------------------- 967 * 0 bLength 1 Number 968 * Size of this descriptor, in bytes: 24+p+n*2 969 * ---------------------------------------------------------- 970 * 23+p+n bmControlsType N Bitmap 971 * Individual bits in the set are defined: 972 * 0: Absolute 973 * 1: Relative 974 * 975 * This bitset is mapped exactly the same as bmControls. 976 * ---------------------------------------------------------- 977 * 23+p+n*2 bReserved 1 Boolean 978 * ---------------------------------------------------------- 979 * 24+p+n*2 iExtension 1 Index 980 * Index of a string descriptor that describes this 981 * extension unit. 982 * ---------------------------------------------------------- 983 */ 984 p = buflen >= 22 ? buffer[21] : 0; 985 n = buflen >= 25 + p ? buffer[22+p] : 0; 986 987 if (buflen < 25 + p + 2*n) { 988 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 989 "interface %d EXTENSION_UNIT error\n", 990 udev->devnum, alts->desc.bInterfaceNumber); 991 break; 992 } 993 994 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 995 p + 1, 2*n); 996 if (unit == NULL) 997 return -ENOMEM; 998 999 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1000 unit->extension.bNumControls = buffer[20]; 1001 memcpy(unit->baSourceID, &buffer[22], p); 1002 unit->extension.bControlSize = buffer[22+p]; 1003 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1004 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit) 1005 + n; 1006 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 1007 1008 if (buffer[24+p+2*n] != 0) 1009 usb_string(udev, buffer[24+p+2*n], unit->name, 1010 sizeof(unit->name)); 1011 else 1012 sprintf(unit->name, "Extension %u", buffer[3]); 1013 1014 list_add_tail(&unit->list, &dev->entities); 1015 handled = 1; 1016 break; 1017 } 1018 1019 return handled; 1020 } 1021 1022 static int uvc_parse_standard_control(struct uvc_device *dev, 1023 const unsigned char *buffer, int buflen) 1024 { 1025 struct usb_device *udev = dev->udev; 1026 struct uvc_entity *unit, *term; 1027 struct usb_interface *intf; 1028 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1029 unsigned int i, n, p, len; 1030 u16 type; 1031 1032 switch (buffer[2]) { 1033 case UVC_VC_HEADER: 1034 n = buflen >= 12 ? buffer[11] : 0; 1035 1036 if (buflen < 12 + n) { 1037 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1038 "interface %d HEADER error\n", udev->devnum, 1039 alts->desc.bInterfaceNumber); 1040 return -EINVAL; 1041 } 1042 1043 dev->uvc_version = get_unaligned_le16(&buffer[3]); 1044 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 1045 1046 /* Parse all USB Video Streaming interfaces. */ 1047 for (i = 0; i < n; ++i) { 1048 intf = usb_ifnum_to_if(udev, buffer[12+i]); 1049 if (intf == NULL) { 1050 uvc_trace(UVC_TRACE_DESCR, "device %d " 1051 "interface %d doesn't exists\n", 1052 udev->devnum, i); 1053 continue; 1054 } 1055 1056 uvc_parse_streaming(dev, intf); 1057 } 1058 break; 1059 1060 case UVC_VC_INPUT_TERMINAL: 1061 if (buflen < 8) { 1062 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1063 "interface %d INPUT_TERMINAL error\n", 1064 udev->devnum, alts->desc.bInterfaceNumber); 1065 return -EINVAL; 1066 } 1067 1068 /* Make sure the terminal type MSB is not null, otherwise it 1069 * could be confused with a unit. 1070 */ 1071 type = get_unaligned_le16(&buffer[4]); 1072 if ((type & 0xff00) == 0) { 1073 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1074 "interface %d INPUT_TERMINAL %d has invalid " 1075 "type 0x%04x, skipping\n", udev->devnum, 1076 alts->desc.bInterfaceNumber, 1077 buffer[3], type); 1078 return 0; 1079 } 1080 1081 n = 0; 1082 p = 0; 1083 len = 8; 1084 1085 if (type == UVC_ITT_CAMERA) { 1086 n = buflen >= 15 ? buffer[14] : 0; 1087 len = 15; 1088 1089 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1090 n = buflen >= 9 ? buffer[8] : 0; 1091 p = buflen >= 10 + n ? buffer[9+n] : 0; 1092 len = 10; 1093 } 1094 1095 if (buflen < len + n + p) { 1096 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1097 "interface %d INPUT_TERMINAL error\n", 1098 udev->devnum, alts->desc.bInterfaceNumber); 1099 return -EINVAL; 1100 } 1101 1102 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1103 1, n + p); 1104 if (term == NULL) 1105 return -ENOMEM; 1106 1107 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1108 term->camera.bControlSize = n; 1109 term->camera.bmControls = (u8 *)term + sizeof(*term); 1110 term->camera.wObjectiveFocalLengthMin = 1111 get_unaligned_le16(&buffer[8]); 1112 term->camera.wObjectiveFocalLengthMax = 1113 get_unaligned_le16(&buffer[10]); 1114 term->camera.wOcularFocalLength = 1115 get_unaligned_le16(&buffer[12]); 1116 memcpy(term->camera.bmControls, &buffer[15], n); 1117 } else if (UVC_ENTITY_TYPE(term) == 1118 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1119 term->media.bControlSize = n; 1120 term->media.bmControls = (u8 *)term + sizeof(*term); 1121 term->media.bTransportModeSize = p; 1122 term->media.bmTransportModes = (u8 *)term 1123 + sizeof(*term) + n; 1124 memcpy(term->media.bmControls, &buffer[9], n); 1125 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1126 } 1127 1128 if (buffer[7] != 0) 1129 usb_string(udev, buffer[7], term->name, 1130 sizeof(term->name)); 1131 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1132 sprintf(term->name, "Camera %u", buffer[3]); 1133 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1134 sprintf(term->name, "Media %u", buffer[3]); 1135 else 1136 sprintf(term->name, "Input %u", buffer[3]); 1137 1138 list_add_tail(&term->list, &dev->entities); 1139 break; 1140 1141 case UVC_VC_OUTPUT_TERMINAL: 1142 if (buflen < 9) { 1143 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1144 "interface %d OUTPUT_TERMINAL error\n", 1145 udev->devnum, alts->desc.bInterfaceNumber); 1146 return -EINVAL; 1147 } 1148 1149 /* Make sure the terminal type MSB is not null, otherwise it 1150 * could be confused with a unit. 1151 */ 1152 type = get_unaligned_le16(&buffer[4]); 1153 if ((type & 0xff00) == 0) { 1154 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1155 "interface %d OUTPUT_TERMINAL %d has invalid " 1156 "type 0x%04x, skipping\n", udev->devnum, 1157 alts->desc.bInterfaceNumber, buffer[3], type); 1158 return 0; 1159 } 1160 1161 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1162 1, 0); 1163 if (term == NULL) 1164 return -ENOMEM; 1165 1166 memcpy(term->baSourceID, &buffer[7], 1); 1167 1168 if (buffer[8] != 0) 1169 usb_string(udev, buffer[8], term->name, 1170 sizeof(term->name)); 1171 else 1172 sprintf(term->name, "Output %u", buffer[3]); 1173 1174 list_add_tail(&term->list, &dev->entities); 1175 break; 1176 1177 case UVC_VC_SELECTOR_UNIT: 1178 p = buflen >= 5 ? buffer[4] : 0; 1179 1180 if (buflen < 5 || buflen < 6 + p) { 1181 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1182 "interface %d SELECTOR_UNIT error\n", 1183 udev->devnum, alts->desc.bInterfaceNumber); 1184 return -EINVAL; 1185 } 1186 1187 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1188 if (unit == NULL) 1189 return -ENOMEM; 1190 1191 memcpy(unit->baSourceID, &buffer[5], p); 1192 1193 if (buffer[5+p] != 0) 1194 usb_string(udev, buffer[5+p], unit->name, 1195 sizeof(unit->name)); 1196 else 1197 sprintf(unit->name, "Selector %u", buffer[3]); 1198 1199 list_add_tail(&unit->list, &dev->entities); 1200 break; 1201 1202 case UVC_VC_PROCESSING_UNIT: 1203 n = buflen >= 8 ? buffer[7] : 0; 1204 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1205 1206 if (buflen < p + n) { 1207 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1208 "interface %d PROCESSING_UNIT error\n", 1209 udev->devnum, alts->desc.bInterfaceNumber); 1210 return -EINVAL; 1211 } 1212 1213 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1214 if (unit == NULL) 1215 return -ENOMEM; 1216 1217 memcpy(unit->baSourceID, &buffer[4], 1); 1218 unit->processing.wMaxMultiplier = 1219 get_unaligned_le16(&buffer[5]); 1220 unit->processing.bControlSize = buffer[7]; 1221 unit->processing.bmControls = (u8 *)unit + sizeof(*unit); 1222 memcpy(unit->processing.bmControls, &buffer[8], n); 1223 if (dev->uvc_version >= 0x0110) 1224 unit->processing.bmVideoStandards = buffer[9+n]; 1225 1226 if (buffer[8+n] != 0) 1227 usb_string(udev, buffer[8+n], unit->name, 1228 sizeof(unit->name)); 1229 else 1230 sprintf(unit->name, "Processing %u", buffer[3]); 1231 1232 list_add_tail(&unit->list, &dev->entities); 1233 break; 1234 1235 case UVC_VC_EXTENSION_UNIT: 1236 p = buflen >= 22 ? buffer[21] : 0; 1237 n = buflen >= 24 + p ? buffer[22+p] : 0; 1238 1239 if (buflen < 24 + p + n) { 1240 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1241 "interface %d EXTENSION_UNIT error\n", 1242 udev->devnum, alts->desc.bInterfaceNumber); 1243 return -EINVAL; 1244 } 1245 1246 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1247 if (unit == NULL) 1248 return -ENOMEM; 1249 1250 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1251 unit->extension.bNumControls = buffer[20]; 1252 memcpy(unit->baSourceID, &buffer[22], p); 1253 unit->extension.bControlSize = buffer[22+p]; 1254 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1255 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1256 1257 if (buffer[23+p+n] != 0) 1258 usb_string(udev, buffer[23+p+n], unit->name, 1259 sizeof(unit->name)); 1260 else 1261 sprintf(unit->name, "Extension %u", buffer[3]); 1262 1263 list_add_tail(&unit->list, &dev->entities); 1264 break; 1265 1266 default: 1267 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1268 "descriptor (%u)\n", buffer[2]); 1269 break; 1270 } 1271 1272 return 0; 1273 } 1274 1275 static int uvc_parse_control(struct uvc_device *dev) 1276 { 1277 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1278 unsigned char *buffer = alts->extra; 1279 int buflen = alts->extralen; 1280 int ret; 1281 1282 /* Parse the default alternate setting only, as the UVC specification 1283 * defines a single alternate setting, the default alternate setting 1284 * zero. 1285 */ 1286 1287 while (buflen > 2) { 1288 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1289 buffer[1] != USB_DT_CS_INTERFACE) 1290 goto next_descriptor; 1291 1292 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1293 return ret; 1294 1295 next_descriptor: 1296 buflen -= buffer[0]; 1297 buffer += buffer[0]; 1298 } 1299 1300 /* Check if the optional status endpoint is present. Built-in iSight 1301 * webcams have an interrupt endpoint but spit proprietary data that 1302 * don't conform to the UVC status endpoint messages. Don't try to 1303 * handle the interrupt endpoint for those cameras. 1304 */ 1305 if (alts->desc.bNumEndpoints == 1 && 1306 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1307 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1308 struct usb_endpoint_descriptor *desc = &ep->desc; 1309 1310 if (usb_endpoint_is_int_in(desc) && 1311 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1312 desc->bInterval != 0) { 1313 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1314 "(addr %02x).\n", desc->bEndpointAddress); 1315 dev->int_ep = ep; 1316 } 1317 } 1318 1319 return 0; 1320 } 1321 1322 /* ------------------------------------------------------------------------ 1323 * UVC device scan 1324 */ 1325 1326 /* 1327 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1328 * and containing the following units: 1329 * 1330 * - one or more Output Terminals (USB Streaming or Display) 1331 * - zero or one Processing Unit 1332 * - zero, one or more single-input Selector Units 1333 * - zero or one multiple-input Selector Units, provided all inputs are 1334 * connected to input terminals 1335 * - zero, one or mode single-input Extension Units 1336 * - one or more Input Terminals (Camera, External or USB Streaming) 1337 * 1338 * The terminal and units must match on of the following structures: 1339 * 1340 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1341 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1342 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1343 * 1344 * +---------+ +---------+ -> OTT_*(0) 1345 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1346 * +---------+ +---------+ -> OTT_*(n) 1347 * 1348 * The Processing Unit and Extension Units can be in any order. Additional 1349 * Extension Units connected to the main chain as single-unit branches are 1350 * also supported. Single-input Selector Units are ignored. 1351 */ 1352 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1353 struct uvc_entity *entity) 1354 { 1355 switch (UVC_ENTITY_TYPE(entity)) { 1356 case UVC_VC_EXTENSION_UNIT: 1357 if (uvc_trace_param & UVC_TRACE_PROBE) 1358 printk(KERN_CONT " <- XU %d", entity->id); 1359 1360 if (entity->bNrInPins != 1) { 1361 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1362 "than 1 input pin.\n", entity->id); 1363 return -1; 1364 } 1365 1366 break; 1367 1368 case UVC_VC_PROCESSING_UNIT: 1369 if (uvc_trace_param & UVC_TRACE_PROBE) 1370 printk(KERN_CONT " <- PU %d", entity->id); 1371 1372 if (chain->processing != NULL) { 1373 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1374 "Processing Units in chain.\n"); 1375 return -1; 1376 } 1377 1378 chain->processing = entity; 1379 break; 1380 1381 case UVC_VC_SELECTOR_UNIT: 1382 if (uvc_trace_param & UVC_TRACE_PROBE) 1383 printk(KERN_CONT " <- SU %d", entity->id); 1384 1385 /* Single-input selector units are ignored. */ 1386 if (entity->bNrInPins == 1) 1387 break; 1388 1389 if (chain->selector != NULL) { 1390 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1391 "Units in chain.\n"); 1392 return -1; 1393 } 1394 1395 chain->selector = entity; 1396 break; 1397 1398 case UVC_ITT_VENDOR_SPECIFIC: 1399 case UVC_ITT_CAMERA: 1400 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1401 if (uvc_trace_param & UVC_TRACE_PROBE) 1402 printk(KERN_CONT " <- IT %d\n", entity->id); 1403 1404 break; 1405 1406 case UVC_OTT_VENDOR_SPECIFIC: 1407 case UVC_OTT_DISPLAY: 1408 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1409 if (uvc_trace_param & UVC_TRACE_PROBE) 1410 printk(KERN_CONT " OT %d", entity->id); 1411 1412 break; 1413 1414 case UVC_TT_STREAMING: 1415 if (UVC_ENTITY_IS_ITERM(entity)) { 1416 if (uvc_trace_param & UVC_TRACE_PROBE) 1417 printk(KERN_CONT " <- IT %d\n", entity->id); 1418 } else { 1419 if (uvc_trace_param & UVC_TRACE_PROBE) 1420 printk(KERN_CONT " OT %d", entity->id); 1421 } 1422 1423 break; 1424 1425 default: 1426 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1427 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1428 return -1; 1429 } 1430 1431 list_add_tail(&entity->chain, &chain->entities); 1432 return 0; 1433 } 1434 1435 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1436 struct uvc_entity *entity, struct uvc_entity *prev) 1437 { 1438 struct uvc_entity *forward; 1439 int found; 1440 1441 /* Forward scan */ 1442 forward = NULL; 1443 found = 0; 1444 1445 while (1) { 1446 forward = uvc_entity_by_reference(chain->dev, entity->id, 1447 forward); 1448 if (forward == NULL) 1449 break; 1450 if (forward == prev) 1451 continue; 1452 1453 switch (UVC_ENTITY_TYPE(forward)) { 1454 case UVC_VC_EXTENSION_UNIT: 1455 if (forward->bNrInPins != 1) { 1456 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1457 "has more than 1 input pin.\n", 1458 entity->id); 1459 return -EINVAL; 1460 } 1461 1462 list_add_tail(&forward->chain, &chain->entities); 1463 if (uvc_trace_param & UVC_TRACE_PROBE) { 1464 if (!found) 1465 printk(KERN_CONT " (->"); 1466 1467 printk(KERN_CONT " XU %d", forward->id); 1468 found = 1; 1469 } 1470 break; 1471 1472 case UVC_OTT_VENDOR_SPECIFIC: 1473 case UVC_OTT_DISPLAY: 1474 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1475 case UVC_TT_STREAMING: 1476 if (UVC_ENTITY_IS_ITERM(forward)) { 1477 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1478 "terminal %u.\n", forward->id); 1479 return -EINVAL; 1480 } 1481 1482 list_add_tail(&forward->chain, &chain->entities); 1483 if (uvc_trace_param & UVC_TRACE_PROBE) { 1484 if (!found) 1485 printk(KERN_CONT " (->"); 1486 1487 printk(KERN_CONT " OT %d", forward->id); 1488 found = 1; 1489 } 1490 break; 1491 } 1492 } 1493 if (found) 1494 printk(KERN_CONT ")"); 1495 1496 return 0; 1497 } 1498 1499 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1500 struct uvc_entity **_entity) 1501 { 1502 struct uvc_entity *entity = *_entity; 1503 struct uvc_entity *term; 1504 int id = -EINVAL, i; 1505 1506 switch (UVC_ENTITY_TYPE(entity)) { 1507 case UVC_VC_EXTENSION_UNIT: 1508 case UVC_VC_PROCESSING_UNIT: 1509 id = entity->baSourceID[0]; 1510 break; 1511 1512 case UVC_VC_SELECTOR_UNIT: 1513 /* Single-input selector units are ignored. */ 1514 if (entity->bNrInPins == 1) { 1515 id = entity->baSourceID[0]; 1516 break; 1517 } 1518 1519 if (uvc_trace_param & UVC_TRACE_PROBE) 1520 printk(KERN_CONT " <- IT"); 1521 1522 chain->selector = entity; 1523 for (i = 0; i < entity->bNrInPins; ++i) { 1524 id = entity->baSourceID[i]; 1525 term = uvc_entity_by_id(chain->dev, id); 1526 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1527 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1528 "input %d isn't connected to an " 1529 "input terminal\n", entity->id, i); 1530 return -1; 1531 } 1532 1533 if (uvc_trace_param & UVC_TRACE_PROBE) 1534 printk(KERN_CONT " %d", term->id); 1535 1536 list_add_tail(&term->chain, &chain->entities); 1537 uvc_scan_chain_forward(chain, term, entity); 1538 } 1539 1540 if (uvc_trace_param & UVC_TRACE_PROBE) 1541 printk(KERN_CONT "\n"); 1542 1543 id = 0; 1544 break; 1545 1546 case UVC_ITT_VENDOR_SPECIFIC: 1547 case UVC_ITT_CAMERA: 1548 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1549 case UVC_OTT_VENDOR_SPECIFIC: 1550 case UVC_OTT_DISPLAY: 1551 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1552 case UVC_TT_STREAMING: 1553 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1554 break; 1555 } 1556 1557 if (id <= 0) { 1558 *_entity = NULL; 1559 return id; 1560 } 1561 1562 entity = uvc_entity_by_id(chain->dev, id); 1563 if (entity == NULL) { 1564 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1565 "unknown entity %d.\n", id); 1566 return -EINVAL; 1567 } 1568 1569 *_entity = entity; 1570 return 0; 1571 } 1572 1573 static int uvc_scan_chain(struct uvc_video_chain *chain, 1574 struct uvc_entity *term) 1575 { 1576 struct uvc_entity *entity, *prev; 1577 1578 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1579 1580 entity = term; 1581 prev = NULL; 1582 1583 while (entity != NULL) { 1584 /* Entity must not be part of an existing chain */ 1585 if (entity->chain.next || entity->chain.prev) { 1586 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1587 "entity %d already in chain.\n", entity->id); 1588 return -EINVAL; 1589 } 1590 1591 /* Process entity */ 1592 if (uvc_scan_chain_entity(chain, entity) < 0) 1593 return -EINVAL; 1594 1595 /* Forward scan */ 1596 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1597 return -EINVAL; 1598 1599 /* Backward scan */ 1600 prev = entity; 1601 if (uvc_scan_chain_backward(chain, &entity) < 0) 1602 return -EINVAL; 1603 } 1604 1605 return 0; 1606 } 1607 1608 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1609 char *buffer) 1610 { 1611 struct uvc_entity *term; 1612 unsigned int nterms = 0; 1613 char *p = buffer; 1614 1615 list_for_each_entry(term, terms, chain) { 1616 if (!UVC_ENTITY_IS_TERM(term) || 1617 UVC_TERM_DIRECTION(term) != dir) 1618 continue; 1619 1620 if (nterms) 1621 p += sprintf(p, ","); 1622 if (++nterms >= 4) { 1623 p += sprintf(p, "..."); 1624 break; 1625 } 1626 p += sprintf(p, "%u", term->id); 1627 } 1628 1629 return p - buffer; 1630 } 1631 1632 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1633 { 1634 static char buffer[43]; 1635 char *p = buffer; 1636 1637 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1638 p += sprintf(p, " -> "); 1639 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1640 1641 return buffer; 1642 } 1643 1644 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev) 1645 { 1646 struct uvc_video_chain *chain; 1647 1648 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1649 if (chain == NULL) 1650 return NULL; 1651 1652 INIT_LIST_HEAD(&chain->entities); 1653 mutex_init(&chain->ctrl_mutex); 1654 chain->dev = dev; 1655 v4l2_prio_init(&chain->prio); 1656 1657 return chain; 1658 } 1659 1660 /* 1661 * Fallback heuristic for devices that don't connect units and terminals in a 1662 * valid chain. 1663 * 1664 * Some devices have invalid baSourceID references, causing uvc_scan_chain() 1665 * to fail, but if we just take the entities we can find and put them together 1666 * in the most sensible chain we can think of, turns out they do work anyway. 1667 * Note: This heuristic assumes there is a single chain. 1668 * 1669 * At the time of writing, devices known to have such a broken chain are 1670 * - Acer Integrated Camera (5986:055a) 1671 * - Realtek rtl157a7 (0bda:57a7) 1672 */ 1673 static int uvc_scan_fallback(struct uvc_device *dev) 1674 { 1675 struct uvc_video_chain *chain; 1676 struct uvc_entity *iterm = NULL; 1677 struct uvc_entity *oterm = NULL; 1678 struct uvc_entity *entity; 1679 struct uvc_entity *prev; 1680 1681 /* 1682 * Start by locating the input and output terminals. We only support 1683 * devices with exactly one of each for now. 1684 */ 1685 list_for_each_entry(entity, &dev->entities, list) { 1686 if (UVC_ENTITY_IS_ITERM(entity)) { 1687 if (iterm) 1688 return -EINVAL; 1689 iterm = entity; 1690 } 1691 1692 if (UVC_ENTITY_IS_OTERM(entity)) { 1693 if (oterm) 1694 return -EINVAL; 1695 oterm = entity; 1696 } 1697 } 1698 1699 if (iterm == NULL || oterm == NULL) 1700 return -EINVAL; 1701 1702 /* Allocate the chain and fill it. */ 1703 chain = uvc_alloc_chain(dev); 1704 if (chain == NULL) 1705 return -ENOMEM; 1706 1707 if (uvc_scan_chain_entity(chain, oterm) < 0) 1708 goto error; 1709 1710 prev = oterm; 1711 1712 /* 1713 * Add all Processing and Extension Units with two pads. The order 1714 * doesn't matter much, use reverse list traversal to connect units in 1715 * UVC descriptor order as we build the chain from output to input. This 1716 * leads to units appearing in the order meant by the manufacturer for 1717 * the cameras known to require this heuristic. 1718 */ 1719 list_for_each_entry_reverse(entity, &dev->entities, list) { 1720 if (entity->type != UVC_VC_PROCESSING_UNIT && 1721 entity->type != UVC_VC_EXTENSION_UNIT) 1722 continue; 1723 1724 if (entity->num_pads != 2) 1725 continue; 1726 1727 if (uvc_scan_chain_entity(chain, entity) < 0) 1728 goto error; 1729 1730 prev->baSourceID[0] = entity->id; 1731 prev = entity; 1732 } 1733 1734 if (uvc_scan_chain_entity(chain, iterm) < 0) 1735 goto error; 1736 1737 prev->baSourceID[0] = iterm->id; 1738 1739 list_add_tail(&chain->list, &dev->chains); 1740 1741 uvc_trace(UVC_TRACE_PROBE, 1742 "Found a video chain by fallback heuristic (%s).\n", 1743 uvc_print_chain(chain)); 1744 1745 return 0; 1746 1747 error: 1748 kfree(chain); 1749 return -EINVAL; 1750 } 1751 1752 /* 1753 * Scan the device for video chains and register video devices. 1754 * 1755 * Chains are scanned starting at their output terminals and walked backwards. 1756 */ 1757 static int uvc_scan_device(struct uvc_device *dev) 1758 { 1759 struct uvc_video_chain *chain; 1760 struct uvc_entity *term; 1761 1762 list_for_each_entry(term, &dev->entities, list) { 1763 if (!UVC_ENTITY_IS_OTERM(term)) 1764 continue; 1765 1766 /* If the terminal is already included in a chain, skip it. 1767 * This can happen for chains that have multiple output 1768 * terminals, where all output terminals beside the first one 1769 * will be inserted in the chain in forward scans. 1770 */ 1771 if (term->chain.next || term->chain.prev) 1772 continue; 1773 1774 chain = uvc_alloc_chain(dev); 1775 if (chain == NULL) 1776 return -ENOMEM; 1777 1778 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1779 1780 if (uvc_scan_chain(chain, term) < 0) { 1781 kfree(chain); 1782 continue; 1783 } 1784 1785 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1786 uvc_print_chain(chain)); 1787 1788 list_add_tail(&chain->list, &dev->chains); 1789 } 1790 1791 if (list_empty(&dev->chains)) 1792 uvc_scan_fallback(dev); 1793 1794 if (list_empty(&dev->chains)) { 1795 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1796 return -1; 1797 } 1798 1799 return 0; 1800 } 1801 1802 /* ------------------------------------------------------------------------ 1803 * Video device registration and unregistration 1804 */ 1805 1806 /* 1807 * Delete the UVC device. 1808 * 1809 * Called by the kernel when the last reference to the uvc_device structure 1810 * is released. 1811 * 1812 * As this function is called after or during disconnect(), all URBs have 1813 * already been canceled by the USB core. There is no need to kill the 1814 * interrupt URB manually. 1815 */ 1816 static void uvc_delete(struct kref *kref) 1817 { 1818 struct uvc_device *dev = container_of(kref, struct uvc_device, ref); 1819 struct list_head *p, *n; 1820 1821 uvc_status_cleanup(dev); 1822 uvc_ctrl_cleanup_device(dev); 1823 1824 usb_put_intf(dev->intf); 1825 usb_put_dev(dev->udev); 1826 1827 if (dev->vdev.dev) 1828 v4l2_device_unregister(&dev->vdev); 1829 #ifdef CONFIG_MEDIA_CONTROLLER 1830 if (media_devnode_is_registered(dev->mdev.devnode)) 1831 media_device_unregister(&dev->mdev); 1832 media_device_cleanup(&dev->mdev); 1833 #endif 1834 1835 list_for_each_safe(p, n, &dev->chains) { 1836 struct uvc_video_chain *chain; 1837 chain = list_entry(p, struct uvc_video_chain, list); 1838 kfree(chain); 1839 } 1840 1841 list_for_each_safe(p, n, &dev->entities) { 1842 struct uvc_entity *entity; 1843 entity = list_entry(p, struct uvc_entity, list); 1844 #ifdef CONFIG_MEDIA_CONTROLLER 1845 uvc_mc_cleanup_entity(entity); 1846 #endif 1847 kfree(entity); 1848 } 1849 1850 list_for_each_safe(p, n, &dev->streams) { 1851 struct uvc_streaming *streaming; 1852 streaming = list_entry(p, struct uvc_streaming, list); 1853 usb_driver_release_interface(&uvc_driver.driver, 1854 streaming->intf); 1855 usb_put_intf(streaming->intf); 1856 kfree(streaming->format); 1857 kfree(streaming->header.bmaControls); 1858 kfree(streaming); 1859 } 1860 1861 kfree(dev); 1862 } 1863 1864 static void uvc_release(struct video_device *vdev) 1865 { 1866 struct uvc_streaming *stream = video_get_drvdata(vdev); 1867 struct uvc_device *dev = stream->dev; 1868 1869 kref_put(&dev->ref, uvc_delete); 1870 } 1871 1872 /* 1873 * Unregister the video devices. 1874 */ 1875 static void uvc_unregister_video(struct uvc_device *dev) 1876 { 1877 struct uvc_streaming *stream; 1878 1879 list_for_each_entry(stream, &dev->streams, list) { 1880 if (!video_is_registered(&stream->vdev)) 1881 continue; 1882 1883 video_unregister_device(&stream->vdev); 1884 video_unregister_device(&stream->meta.vdev); 1885 1886 uvc_debugfs_cleanup_stream(stream); 1887 } 1888 } 1889 1890 int uvc_register_video_device(struct uvc_device *dev, 1891 struct uvc_streaming *stream, 1892 struct video_device *vdev, 1893 struct uvc_video_queue *queue, 1894 enum v4l2_buf_type type, 1895 const struct v4l2_file_operations *fops, 1896 const struct v4l2_ioctl_ops *ioctl_ops) 1897 { 1898 int ret; 1899 1900 /* Initialize the video buffers queue. */ 1901 ret = uvc_queue_init(queue, type, !uvc_no_drop_param); 1902 if (ret) 1903 return ret; 1904 1905 /* Register the device with V4L. */ 1906 1907 /* 1908 * We already hold a reference to dev->udev. The video device will be 1909 * unregistered before the reference is released, so we don't need to 1910 * get another one. 1911 */ 1912 vdev->v4l2_dev = &dev->vdev; 1913 vdev->fops = fops; 1914 vdev->ioctl_ops = ioctl_ops; 1915 vdev->release = uvc_release; 1916 vdev->prio = &stream->chain->prio; 1917 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1918 vdev->vfl_dir = VFL_DIR_TX; 1919 else 1920 vdev->vfl_dir = VFL_DIR_RX; 1921 1922 switch (type) { 1923 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1924 default: 1925 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1926 break; 1927 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1928 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 1929 break; 1930 case V4L2_BUF_TYPE_META_CAPTURE: 1931 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; 1932 break; 1933 } 1934 1935 strlcpy(vdev->name, dev->name, sizeof(vdev->name)); 1936 1937 /* 1938 * Set the driver data before calling video_register_device, otherwise 1939 * the file open() handler might race us. 1940 */ 1941 video_set_drvdata(vdev, stream); 1942 1943 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1944 if (ret < 0) { 1945 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n", 1946 v4l2_type_names[type], ret); 1947 return ret; 1948 } 1949 1950 kref_get(&dev->ref); 1951 return 0; 1952 } 1953 1954 static int uvc_register_video(struct uvc_device *dev, 1955 struct uvc_streaming *stream) 1956 { 1957 int ret; 1958 1959 /* Initialize the streaming interface with default parameters. */ 1960 ret = uvc_video_init(stream); 1961 if (ret < 0) { 1962 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n", 1963 ret); 1964 return ret; 1965 } 1966 1967 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 1968 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE 1969 | V4L2_CAP_META_CAPTURE; 1970 else 1971 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 1972 1973 uvc_debugfs_init_stream(stream); 1974 1975 /* Register the device with V4L. */ 1976 return uvc_register_video_device(dev, stream, &stream->vdev, 1977 &stream->queue, stream->type, 1978 &uvc_fops, &uvc_ioctl_ops); 1979 } 1980 1981 /* 1982 * Register all video devices in all chains. 1983 */ 1984 static int uvc_register_terms(struct uvc_device *dev, 1985 struct uvc_video_chain *chain) 1986 { 1987 struct uvc_streaming *stream; 1988 struct uvc_entity *term; 1989 int ret; 1990 1991 list_for_each_entry(term, &chain->entities, chain) { 1992 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 1993 continue; 1994 1995 stream = uvc_stream_by_id(dev, term->id); 1996 if (stream == NULL) { 1997 uvc_printk(KERN_INFO, "No streaming interface found " 1998 "for terminal %u.", term->id); 1999 continue; 2000 } 2001 2002 stream->chain = chain; 2003 ret = uvc_register_video(dev, stream); 2004 if (ret < 0) 2005 return ret; 2006 2007 /* Register a metadata node, but ignore a possible failure, 2008 * complete registration of video nodes anyway. 2009 */ 2010 uvc_meta_register(stream); 2011 2012 term->vdev = &stream->vdev; 2013 } 2014 2015 return 0; 2016 } 2017 2018 static int uvc_register_chains(struct uvc_device *dev) 2019 { 2020 struct uvc_video_chain *chain; 2021 int ret; 2022 2023 list_for_each_entry(chain, &dev->chains, list) { 2024 ret = uvc_register_terms(dev, chain); 2025 if (ret < 0) 2026 return ret; 2027 2028 #ifdef CONFIG_MEDIA_CONTROLLER 2029 ret = uvc_mc_register_entities(chain); 2030 if (ret < 0) { 2031 uvc_printk(KERN_INFO, "Failed to register entites " 2032 "(%d).\n", ret); 2033 } 2034 #endif 2035 } 2036 2037 return 0; 2038 } 2039 2040 /* ------------------------------------------------------------------------ 2041 * USB probe, disconnect, suspend and resume 2042 */ 2043 2044 struct uvc_device_info { 2045 u32 quirks; 2046 u32 meta_format; 2047 }; 2048 2049 static int uvc_probe(struct usb_interface *intf, 2050 const struct usb_device_id *id) 2051 { 2052 struct usb_device *udev = interface_to_usbdev(intf); 2053 struct uvc_device *dev; 2054 const struct uvc_device_info *info = 2055 (const struct uvc_device_info *)id->driver_info; 2056 u32 quirks = info ? info->quirks : 0; 2057 int function; 2058 int ret; 2059 2060 if (id->idVendor && id->idProduct) 2061 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 2062 "(%04x:%04x)\n", udev->devpath, id->idVendor, 2063 id->idProduct); 2064 else 2065 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 2066 udev->devpath); 2067 2068 /* Allocate memory for the device and initialize it. */ 2069 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2070 if (dev == NULL) 2071 return -ENOMEM; 2072 2073 INIT_LIST_HEAD(&dev->entities); 2074 INIT_LIST_HEAD(&dev->chains); 2075 INIT_LIST_HEAD(&dev->streams); 2076 kref_init(&dev->ref); 2077 atomic_set(&dev->nmappings, 0); 2078 mutex_init(&dev->lock); 2079 2080 dev->udev = usb_get_dev(udev); 2081 dev->intf = usb_get_intf(intf); 2082 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 2083 dev->quirks = (uvc_quirks_param == -1) 2084 ? quirks : uvc_quirks_param; 2085 if (info) 2086 dev->meta_format = info->meta_format; 2087 2088 if (udev->product != NULL) 2089 strlcpy(dev->name, udev->product, sizeof(dev->name)); 2090 else 2091 snprintf(dev->name, sizeof(dev->name), 2092 "UVC Camera (%04x:%04x)", 2093 le16_to_cpu(udev->descriptor.idVendor), 2094 le16_to_cpu(udev->descriptor.idProduct)); 2095 2096 /* 2097 * Add iFunction or iInterface to names when available as additional 2098 * distinguishers between interfaces. iFunction is prioritized over 2099 * iInterface which matches Windows behavior at the point of writing. 2100 */ 2101 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0) 2102 function = intf->intf_assoc->iFunction; 2103 else 2104 function = intf->cur_altsetting->desc.iInterface; 2105 if (function != 0) { 2106 size_t len; 2107 2108 strlcat(dev->name, ": ", sizeof(dev->name)); 2109 len = strlen(dev->name); 2110 usb_string(udev, function, dev->name + len, 2111 sizeof(dev->name) - len); 2112 } 2113 2114 /* Parse the Video Class control descriptor. */ 2115 if (uvc_parse_control(dev) < 0) { 2116 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 2117 "descriptors.\n"); 2118 goto error; 2119 } 2120 2121 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 2122 dev->uvc_version >> 8, dev->uvc_version & 0xff, 2123 udev->product ? udev->product : "<unnamed>", 2124 le16_to_cpu(udev->descriptor.idVendor), 2125 le16_to_cpu(udev->descriptor.idProduct)); 2126 2127 if (dev->quirks != quirks) { 2128 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 2129 "parameter for testing purpose.\n", dev->quirks); 2130 uvc_printk(KERN_INFO, "Please report required quirks to the " 2131 "linux-uvc-devel mailing list.\n"); 2132 } 2133 2134 /* Initialize the media device and register the V4L2 device. */ 2135 #ifdef CONFIG_MEDIA_CONTROLLER 2136 dev->mdev.dev = &intf->dev; 2137 strlcpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 2138 if (udev->serial) 2139 strlcpy(dev->mdev.serial, udev->serial, 2140 sizeof(dev->mdev.serial)); 2141 strcpy(dev->mdev.bus_info, udev->devpath); 2142 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 2143 media_device_init(&dev->mdev); 2144 2145 dev->vdev.mdev = &dev->mdev; 2146 #endif 2147 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 2148 goto error; 2149 2150 /* Initialize controls. */ 2151 if (uvc_ctrl_init_device(dev) < 0) 2152 goto error; 2153 2154 /* Scan the device for video chains. */ 2155 if (uvc_scan_device(dev) < 0) 2156 goto error; 2157 2158 /* Register video device nodes. */ 2159 if (uvc_register_chains(dev) < 0) 2160 goto error; 2161 2162 #ifdef CONFIG_MEDIA_CONTROLLER 2163 /* Register the media device node */ 2164 if (media_device_register(&dev->mdev) < 0) 2165 goto error; 2166 #endif 2167 /* Save our data pointer in the interface data. */ 2168 usb_set_intfdata(intf, dev); 2169 2170 /* Initialize the interrupt URB. */ 2171 if ((ret = uvc_status_init(dev)) < 0) { 2172 uvc_printk(KERN_INFO, "Unable to initialize the status " 2173 "endpoint (%d), status interrupt will not be " 2174 "supported.\n", ret); 2175 } 2176 2177 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 2178 usb_enable_autosuspend(udev); 2179 return 0; 2180 2181 error: 2182 uvc_unregister_video(dev); 2183 kref_put(&dev->ref, uvc_delete); 2184 return -ENODEV; 2185 } 2186 2187 static void uvc_disconnect(struct usb_interface *intf) 2188 { 2189 struct uvc_device *dev = usb_get_intfdata(intf); 2190 2191 /* Set the USB interface data to NULL. This can be done outside the 2192 * lock, as there's no other reader. 2193 */ 2194 usb_set_intfdata(intf, NULL); 2195 2196 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2197 UVC_SC_VIDEOSTREAMING) 2198 return; 2199 2200 uvc_unregister_video(dev); 2201 kref_put(&dev->ref, uvc_delete); 2202 } 2203 2204 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 2205 { 2206 struct uvc_device *dev = usb_get_intfdata(intf); 2207 struct uvc_streaming *stream; 2208 2209 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 2210 intf->cur_altsetting->desc.bInterfaceNumber); 2211 2212 /* Controls are cached on the fly so they don't need to be saved. */ 2213 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2214 UVC_SC_VIDEOCONTROL) { 2215 mutex_lock(&dev->lock); 2216 if (dev->users) 2217 uvc_status_stop(dev); 2218 mutex_unlock(&dev->lock); 2219 return 0; 2220 } 2221 2222 list_for_each_entry(stream, &dev->streams, list) { 2223 if (stream->intf == intf) 2224 return uvc_video_suspend(stream); 2225 } 2226 2227 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2228 "mismatch.\n"); 2229 return -EINVAL; 2230 } 2231 2232 static int __uvc_resume(struct usb_interface *intf, int reset) 2233 { 2234 struct uvc_device *dev = usb_get_intfdata(intf); 2235 struct uvc_streaming *stream; 2236 int ret = 0; 2237 2238 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2239 intf->cur_altsetting->desc.bInterfaceNumber); 2240 2241 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2242 UVC_SC_VIDEOCONTROL) { 2243 if (reset) { 2244 ret = uvc_ctrl_restore_values(dev); 2245 if (ret < 0) 2246 return ret; 2247 } 2248 2249 mutex_lock(&dev->lock); 2250 if (dev->users) 2251 ret = uvc_status_start(dev, GFP_NOIO); 2252 mutex_unlock(&dev->lock); 2253 2254 return ret; 2255 } 2256 2257 list_for_each_entry(stream, &dev->streams, list) { 2258 if (stream->intf == intf) { 2259 ret = uvc_video_resume(stream, reset); 2260 if (ret < 0) 2261 uvc_queue_streamoff(&stream->queue, 2262 stream->queue.queue.type); 2263 return ret; 2264 } 2265 } 2266 2267 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2268 "mismatch.\n"); 2269 return -EINVAL; 2270 } 2271 2272 static int uvc_resume(struct usb_interface *intf) 2273 { 2274 return __uvc_resume(intf, 0); 2275 } 2276 2277 static int uvc_reset_resume(struct usb_interface *intf) 2278 { 2279 return __uvc_resume(intf, 1); 2280 } 2281 2282 /* ------------------------------------------------------------------------ 2283 * Module parameters 2284 */ 2285 2286 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp) 2287 { 2288 if (uvc_clock_param == CLOCK_MONOTONIC) 2289 return sprintf(buffer, "CLOCK_MONOTONIC"); 2290 else 2291 return sprintf(buffer, "CLOCK_REALTIME"); 2292 } 2293 2294 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp) 2295 { 2296 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2297 val += strlen("clock_"); 2298 2299 if (strcasecmp(val, "monotonic") == 0) 2300 uvc_clock_param = CLOCK_MONOTONIC; 2301 else if (strcasecmp(val, "realtime") == 0) 2302 uvc_clock_param = CLOCK_REALTIME; 2303 else 2304 return -EINVAL; 2305 2306 return 0; 2307 } 2308 2309 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2310 &uvc_clock_param, S_IRUGO|S_IWUSR); 2311 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2312 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR); 2313 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); 2314 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2315 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2316 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2317 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2318 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2319 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2320 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2321 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2322 2323 /* ------------------------------------------------------------------------ 2324 * Driver initialization and cleanup 2325 */ 2326 2327 static const struct uvc_device_info uvc_quirk_probe_minmax = { 2328 .quirks = UVC_QUIRK_PROBE_MINMAX, 2329 }; 2330 2331 static const struct uvc_device_info uvc_quirk_fix_bandwidth = { 2332 .quirks = UVC_QUIRK_FIX_BANDWIDTH, 2333 }; 2334 2335 static const struct uvc_device_info uvc_quirk_probe_def = { 2336 .quirks = UVC_QUIRK_PROBE_DEF, 2337 }; 2338 2339 static const struct uvc_device_info uvc_quirk_stream_no_fid = { 2340 .quirks = UVC_QUIRK_STREAM_NO_FID, 2341 }; 2342 2343 static const struct uvc_device_info uvc_quirk_force_y8 = { 2344 .quirks = UVC_QUIRK_FORCE_Y8, 2345 }; 2346 2347 #define UVC_QUIRK_INFO(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q} 2348 2349 /* 2350 * The Logitech cameras listed below have their interface class set to 2351 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2352 * though they are compliant. 2353 */ 2354 static const struct usb_device_id uvc_ids[] = { 2355 /* LogiLink Wireless Webcam */ 2356 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2357 | USB_DEVICE_ID_MATCH_INT_INFO, 2358 .idVendor = 0x0416, 2359 .idProduct = 0xa91a, 2360 .bInterfaceClass = USB_CLASS_VIDEO, 2361 .bInterfaceSubClass = 1, 2362 .bInterfaceProtocol = 0, 2363 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2364 /* Genius eFace 2025 */ 2365 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2366 | USB_DEVICE_ID_MATCH_INT_INFO, 2367 .idVendor = 0x0458, 2368 .idProduct = 0x706e, 2369 .bInterfaceClass = USB_CLASS_VIDEO, 2370 .bInterfaceSubClass = 1, 2371 .bInterfaceProtocol = 0, 2372 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2373 /* Microsoft Lifecam NX-6000 */ 2374 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2375 | USB_DEVICE_ID_MATCH_INT_INFO, 2376 .idVendor = 0x045e, 2377 .idProduct = 0x00f8, 2378 .bInterfaceClass = USB_CLASS_VIDEO, 2379 .bInterfaceSubClass = 1, 2380 .bInterfaceProtocol = 0, 2381 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2382 /* Microsoft Lifecam NX-3000 */ 2383 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2384 | USB_DEVICE_ID_MATCH_INT_INFO, 2385 .idVendor = 0x045e, 2386 .idProduct = 0x0721, 2387 .bInterfaceClass = USB_CLASS_VIDEO, 2388 .bInterfaceSubClass = 1, 2389 .bInterfaceProtocol = 0, 2390 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2391 /* Microsoft Lifecam VX-7000 */ 2392 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2393 | USB_DEVICE_ID_MATCH_INT_INFO, 2394 .idVendor = 0x045e, 2395 .idProduct = 0x0723, 2396 .bInterfaceClass = USB_CLASS_VIDEO, 2397 .bInterfaceSubClass = 1, 2398 .bInterfaceProtocol = 0, 2399 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2400 /* Logitech Quickcam Fusion */ 2401 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2402 | USB_DEVICE_ID_MATCH_INT_INFO, 2403 .idVendor = 0x046d, 2404 .idProduct = 0x08c1, 2405 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2406 .bInterfaceSubClass = 1, 2407 .bInterfaceProtocol = 0 }, 2408 /* Logitech Quickcam Orbit MP */ 2409 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2410 | USB_DEVICE_ID_MATCH_INT_INFO, 2411 .idVendor = 0x046d, 2412 .idProduct = 0x08c2, 2413 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2414 .bInterfaceSubClass = 1, 2415 .bInterfaceProtocol = 0 }, 2416 /* Logitech Quickcam Pro for Notebook */ 2417 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2418 | USB_DEVICE_ID_MATCH_INT_INFO, 2419 .idVendor = 0x046d, 2420 .idProduct = 0x08c3, 2421 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2422 .bInterfaceSubClass = 1, 2423 .bInterfaceProtocol = 0 }, 2424 /* Logitech Quickcam Pro 5000 */ 2425 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2426 | USB_DEVICE_ID_MATCH_INT_INFO, 2427 .idVendor = 0x046d, 2428 .idProduct = 0x08c5, 2429 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2430 .bInterfaceSubClass = 1, 2431 .bInterfaceProtocol = 0 }, 2432 /* Logitech Quickcam OEM Dell Notebook */ 2433 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2434 | USB_DEVICE_ID_MATCH_INT_INFO, 2435 .idVendor = 0x046d, 2436 .idProduct = 0x08c6, 2437 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2438 .bInterfaceSubClass = 1, 2439 .bInterfaceProtocol = 0 }, 2440 /* Logitech Quickcam OEM Cisco VT Camera II */ 2441 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2442 | USB_DEVICE_ID_MATCH_INT_INFO, 2443 .idVendor = 0x046d, 2444 .idProduct = 0x08c7, 2445 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2446 .bInterfaceSubClass = 1, 2447 .bInterfaceProtocol = 0 }, 2448 /* Logitech HD Pro Webcam C920 */ 2449 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2450 | USB_DEVICE_ID_MATCH_INT_INFO, 2451 .idVendor = 0x046d, 2452 .idProduct = 0x082d, 2453 .bInterfaceClass = USB_CLASS_VIDEO, 2454 .bInterfaceSubClass = 1, 2455 .bInterfaceProtocol = 0, 2456 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) }, 2457 /* Chicony CNF7129 (Asus EEE 100HE) */ 2458 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2459 | USB_DEVICE_ID_MATCH_INT_INFO, 2460 .idVendor = 0x04f2, 2461 .idProduct = 0xb071, 2462 .bInterfaceClass = USB_CLASS_VIDEO, 2463 .bInterfaceSubClass = 1, 2464 .bInterfaceProtocol = 0, 2465 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_RESTRICT_FRAME_RATE) }, 2466 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2467 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2468 | USB_DEVICE_ID_MATCH_INT_INFO, 2469 .idVendor = 0x058f, 2470 .idProduct = 0x3820, 2471 .bInterfaceClass = USB_CLASS_VIDEO, 2472 .bInterfaceSubClass = 1, 2473 .bInterfaceProtocol = 0, 2474 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2475 /* Dell XPS m1530 */ 2476 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2477 | USB_DEVICE_ID_MATCH_INT_INFO, 2478 .idVendor = 0x05a9, 2479 .idProduct = 0x2640, 2480 .bInterfaceClass = USB_CLASS_VIDEO, 2481 .bInterfaceSubClass = 1, 2482 .bInterfaceProtocol = 0, 2483 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2484 /* Dell SP2008WFP Monitor */ 2485 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2486 | USB_DEVICE_ID_MATCH_INT_INFO, 2487 .idVendor = 0x05a9, 2488 .idProduct = 0x2641, 2489 .bInterfaceClass = USB_CLASS_VIDEO, 2490 .bInterfaceSubClass = 1, 2491 .bInterfaceProtocol = 0, 2492 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2493 /* Dell Alienware X51 */ 2494 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2495 | USB_DEVICE_ID_MATCH_INT_INFO, 2496 .idVendor = 0x05a9, 2497 .idProduct = 0x2643, 2498 .bInterfaceClass = USB_CLASS_VIDEO, 2499 .bInterfaceSubClass = 1, 2500 .bInterfaceProtocol = 0, 2501 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2502 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2503 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2504 | USB_DEVICE_ID_MATCH_INT_INFO, 2505 .idVendor = 0x05a9, 2506 .idProduct = 0x264a, 2507 .bInterfaceClass = USB_CLASS_VIDEO, 2508 .bInterfaceSubClass = 1, 2509 .bInterfaceProtocol = 0, 2510 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2511 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2512 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2513 | USB_DEVICE_ID_MATCH_INT_INFO, 2514 .idVendor = 0x05a9, 2515 .idProduct = 0x7670, 2516 .bInterfaceClass = USB_CLASS_VIDEO, 2517 .bInterfaceSubClass = 1, 2518 .bInterfaceProtocol = 0, 2519 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2520 /* Apple Built-In iSight */ 2521 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2522 | USB_DEVICE_ID_MATCH_INT_INFO, 2523 .idVendor = 0x05ac, 2524 .idProduct = 0x8501, 2525 .bInterfaceClass = USB_CLASS_VIDEO, 2526 .bInterfaceSubClass = 1, 2527 .bInterfaceProtocol = 0, 2528 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX 2529 | UVC_QUIRK_BUILTIN_ISIGHT) }, 2530 /* Apple Built-In iSight via iBridge */ 2531 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2532 | USB_DEVICE_ID_MATCH_INT_INFO, 2533 .idVendor = 0x05ac, 2534 .idProduct = 0x8600, 2535 .bInterfaceClass = USB_CLASS_VIDEO, 2536 .bInterfaceSubClass = 1, 2537 .bInterfaceProtocol = 0, 2538 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2539 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2540 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2541 | USB_DEVICE_ID_MATCH_INT_INFO, 2542 .idVendor = 0x05c8, 2543 .idProduct = 0x0403, 2544 .bInterfaceClass = USB_CLASS_VIDEO, 2545 .bInterfaceSubClass = 1, 2546 .bInterfaceProtocol = 0, 2547 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2548 /* Genesys Logic USB 2.0 PC Camera */ 2549 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2550 | USB_DEVICE_ID_MATCH_INT_INFO, 2551 .idVendor = 0x05e3, 2552 .idProduct = 0x0505, 2553 .bInterfaceClass = USB_CLASS_VIDEO, 2554 .bInterfaceSubClass = 1, 2555 .bInterfaceProtocol = 0, 2556 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2557 /* Hercules Classic Silver */ 2558 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2559 | USB_DEVICE_ID_MATCH_INT_INFO, 2560 .idVendor = 0x06f8, 2561 .idProduct = 0x300c, 2562 .bInterfaceClass = USB_CLASS_VIDEO, 2563 .bInterfaceSubClass = 1, 2564 .bInterfaceProtocol = 0, 2565 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2566 /* ViMicro Vega */ 2567 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2568 | USB_DEVICE_ID_MATCH_INT_INFO, 2569 .idVendor = 0x0ac8, 2570 .idProduct = 0x332d, 2571 .bInterfaceClass = USB_CLASS_VIDEO, 2572 .bInterfaceSubClass = 1, 2573 .bInterfaceProtocol = 0, 2574 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2575 /* ViMicro - Minoru3D */ 2576 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2577 | USB_DEVICE_ID_MATCH_INT_INFO, 2578 .idVendor = 0x0ac8, 2579 .idProduct = 0x3410, 2580 .bInterfaceClass = USB_CLASS_VIDEO, 2581 .bInterfaceSubClass = 1, 2582 .bInterfaceProtocol = 0, 2583 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2584 /* ViMicro Venus - Minoru3D */ 2585 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2586 | USB_DEVICE_ID_MATCH_INT_INFO, 2587 .idVendor = 0x0ac8, 2588 .idProduct = 0x3420, 2589 .bInterfaceClass = USB_CLASS_VIDEO, 2590 .bInterfaceSubClass = 1, 2591 .bInterfaceProtocol = 0, 2592 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2593 /* Ophir Optronics - SPCAM 620U */ 2594 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2595 | USB_DEVICE_ID_MATCH_INT_INFO, 2596 .idVendor = 0x0bd3, 2597 .idProduct = 0x0555, 2598 .bInterfaceClass = USB_CLASS_VIDEO, 2599 .bInterfaceSubClass = 1, 2600 .bInterfaceProtocol = 0, 2601 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2602 /* MT6227 */ 2603 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2604 | USB_DEVICE_ID_MATCH_INT_INFO, 2605 .idVendor = 0x0e8d, 2606 .idProduct = 0x0004, 2607 .bInterfaceClass = USB_CLASS_VIDEO, 2608 .bInterfaceSubClass = 1, 2609 .bInterfaceProtocol = 0, 2610 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX 2611 | UVC_QUIRK_PROBE_DEF) }, 2612 /* IMC Networks (Medion Akoya) */ 2613 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2614 | USB_DEVICE_ID_MATCH_INT_INFO, 2615 .idVendor = 0x13d3, 2616 .idProduct = 0x5103, 2617 .bInterfaceClass = USB_CLASS_VIDEO, 2618 .bInterfaceSubClass = 1, 2619 .bInterfaceProtocol = 0, 2620 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2621 /* JMicron USB2.0 XGA WebCam */ 2622 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2623 | USB_DEVICE_ID_MATCH_INT_INFO, 2624 .idVendor = 0x152d, 2625 .idProduct = 0x0310, 2626 .bInterfaceClass = USB_CLASS_VIDEO, 2627 .bInterfaceSubClass = 1, 2628 .bInterfaceProtocol = 0, 2629 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2630 /* Syntek (HP Spartan) */ 2631 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2632 | USB_DEVICE_ID_MATCH_INT_INFO, 2633 .idVendor = 0x174f, 2634 .idProduct = 0x5212, 2635 .bInterfaceClass = USB_CLASS_VIDEO, 2636 .bInterfaceSubClass = 1, 2637 .bInterfaceProtocol = 0, 2638 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2639 /* Syntek (Samsung Q310) */ 2640 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2641 | USB_DEVICE_ID_MATCH_INT_INFO, 2642 .idVendor = 0x174f, 2643 .idProduct = 0x5931, 2644 .bInterfaceClass = USB_CLASS_VIDEO, 2645 .bInterfaceSubClass = 1, 2646 .bInterfaceProtocol = 0, 2647 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2648 /* Syntek (Packard Bell EasyNote MX52 */ 2649 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2650 | USB_DEVICE_ID_MATCH_INT_INFO, 2651 .idVendor = 0x174f, 2652 .idProduct = 0x8a12, 2653 .bInterfaceClass = USB_CLASS_VIDEO, 2654 .bInterfaceSubClass = 1, 2655 .bInterfaceProtocol = 0, 2656 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2657 /* Syntek (Asus F9SG) */ 2658 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2659 | USB_DEVICE_ID_MATCH_INT_INFO, 2660 .idVendor = 0x174f, 2661 .idProduct = 0x8a31, 2662 .bInterfaceClass = USB_CLASS_VIDEO, 2663 .bInterfaceSubClass = 1, 2664 .bInterfaceProtocol = 0, 2665 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2666 /* Syntek (Asus U3S) */ 2667 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2668 | USB_DEVICE_ID_MATCH_INT_INFO, 2669 .idVendor = 0x174f, 2670 .idProduct = 0x8a33, 2671 .bInterfaceClass = USB_CLASS_VIDEO, 2672 .bInterfaceSubClass = 1, 2673 .bInterfaceProtocol = 0, 2674 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2675 /* Syntek (JAOtech Smart Terminal) */ 2676 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2677 | USB_DEVICE_ID_MATCH_INT_INFO, 2678 .idVendor = 0x174f, 2679 .idProduct = 0x8a34, 2680 .bInterfaceClass = USB_CLASS_VIDEO, 2681 .bInterfaceSubClass = 1, 2682 .bInterfaceProtocol = 0, 2683 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2684 /* Miricle 307K */ 2685 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2686 | USB_DEVICE_ID_MATCH_INT_INFO, 2687 .idVendor = 0x17dc, 2688 .idProduct = 0x0202, 2689 .bInterfaceClass = USB_CLASS_VIDEO, 2690 .bInterfaceSubClass = 1, 2691 .bInterfaceProtocol = 0, 2692 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2693 /* Lenovo Thinkpad SL400/SL500 */ 2694 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2695 | USB_DEVICE_ID_MATCH_INT_INFO, 2696 .idVendor = 0x17ef, 2697 .idProduct = 0x480b, 2698 .bInterfaceClass = USB_CLASS_VIDEO, 2699 .bInterfaceSubClass = 1, 2700 .bInterfaceProtocol = 0, 2701 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2702 /* Aveo Technology USB 2.0 Camera */ 2703 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2704 | USB_DEVICE_ID_MATCH_INT_INFO, 2705 .idVendor = 0x1871, 2706 .idProduct = 0x0306, 2707 .bInterfaceClass = USB_CLASS_VIDEO, 2708 .bInterfaceSubClass = 1, 2709 .bInterfaceProtocol = 0, 2710 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX 2711 | UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2712 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */ 2713 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2714 | USB_DEVICE_ID_MATCH_INT_INFO, 2715 .idVendor = 0x1871, 2716 .idProduct = 0x0516, 2717 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2718 .bInterfaceSubClass = 1, 2719 .bInterfaceProtocol = 0 }, 2720 /* Ecamm Pico iMage */ 2721 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2722 | USB_DEVICE_ID_MATCH_INT_INFO, 2723 .idVendor = 0x18cd, 2724 .idProduct = 0xcafe, 2725 .bInterfaceClass = USB_CLASS_VIDEO, 2726 .bInterfaceSubClass = 1, 2727 .bInterfaceProtocol = 0, 2728 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2729 /* Manta MM-353 Plako */ 2730 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2731 | USB_DEVICE_ID_MATCH_INT_INFO, 2732 .idVendor = 0x18ec, 2733 .idProduct = 0x3188, 2734 .bInterfaceClass = USB_CLASS_VIDEO, 2735 .bInterfaceSubClass = 1, 2736 .bInterfaceProtocol = 0, 2737 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2738 /* FSC WebCam V30S */ 2739 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2740 | USB_DEVICE_ID_MATCH_INT_INFO, 2741 .idVendor = 0x18ec, 2742 .idProduct = 0x3288, 2743 .bInterfaceClass = USB_CLASS_VIDEO, 2744 .bInterfaceSubClass = 1, 2745 .bInterfaceProtocol = 0, 2746 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2747 /* Arkmicro unbranded */ 2748 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2749 | USB_DEVICE_ID_MATCH_INT_INFO, 2750 .idVendor = 0x18ec, 2751 .idProduct = 0x3290, 2752 .bInterfaceClass = USB_CLASS_VIDEO, 2753 .bInterfaceSubClass = 1, 2754 .bInterfaceProtocol = 0, 2755 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2756 /* The Imaging Source USB CCD cameras */ 2757 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2758 | USB_DEVICE_ID_MATCH_INT_INFO, 2759 .idVendor = 0x199e, 2760 .idProduct = 0x8102, 2761 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2762 .bInterfaceSubClass = 1, 2763 .bInterfaceProtocol = 0 }, 2764 /* Bodelin ProScopeHR */ 2765 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2766 | USB_DEVICE_ID_MATCH_DEV_HI 2767 | USB_DEVICE_ID_MATCH_INT_INFO, 2768 .idVendor = 0x19ab, 2769 .idProduct = 0x1000, 2770 .bcdDevice_hi = 0x0126, 2771 .bInterfaceClass = USB_CLASS_VIDEO, 2772 .bInterfaceSubClass = 1, 2773 .bInterfaceProtocol = 0, 2774 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_STATUS_INTERVAL) }, 2775 /* MSI StarCam 370i */ 2776 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2777 | USB_DEVICE_ID_MATCH_INT_INFO, 2778 .idVendor = 0x1b3b, 2779 .idProduct = 0x2951, 2780 .bInterfaceClass = USB_CLASS_VIDEO, 2781 .bInterfaceSubClass = 1, 2782 .bInterfaceProtocol = 0, 2783 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2784 /* Generalplus Technology Inc. 808 Camera */ 2785 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2786 | USB_DEVICE_ID_MATCH_INT_INFO, 2787 .idVendor = 0x1b3f, 2788 .idProduct = 0x2002, 2789 .bInterfaceClass = USB_CLASS_VIDEO, 2790 .bInterfaceSubClass = 1, 2791 .bInterfaceProtocol = 0, 2792 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2793 /* SiGma Micro USB Web Camera */ 2794 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2795 | USB_DEVICE_ID_MATCH_INT_INFO, 2796 .idVendor = 0x1c4f, 2797 .idProduct = 0x3000, 2798 .bInterfaceClass = USB_CLASS_VIDEO, 2799 .bInterfaceSubClass = 1, 2800 .bInterfaceProtocol = 0, 2801 .driver_info = UVC_QUIRK_INFO(UVC_QUIRK_PROBE_MINMAX 2802 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) }, 2803 /* Oculus VR Positional Tracker DK2 */ 2804 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2805 | USB_DEVICE_ID_MATCH_INT_INFO, 2806 .idVendor = 0x2833, 2807 .idProduct = 0x0201, 2808 .bInterfaceClass = USB_CLASS_VIDEO, 2809 .bInterfaceSubClass = 1, 2810 .bInterfaceProtocol = 0, 2811 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2812 /* Oculus VR Rift Sensor */ 2813 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2814 | USB_DEVICE_ID_MATCH_INT_INFO, 2815 .idVendor = 0x2833, 2816 .idProduct = 0x0211, 2817 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2818 .bInterfaceSubClass = 1, 2819 .bInterfaceProtocol = 0, 2820 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2821 /* Generic USB Video Class */ 2822 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) }, 2823 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) }, 2824 {} 2825 }; 2826 2827 MODULE_DEVICE_TABLE(usb, uvc_ids); 2828 2829 struct uvc_driver uvc_driver = { 2830 .driver = { 2831 .name = "uvcvideo", 2832 .probe = uvc_probe, 2833 .disconnect = uvc_disconnect, 2834 .suspend = uvc_suspend, 2835 .resume = uvc_resume, 2836 .reset_resume = uvc_reset_resume, 2837 .id_table = uvc_ids, 2838 .supports_autosuspend = 1, 2839 }, 2840 }; 2841 2842 static int __init uvc_init(void) 2843 { 2844 int ret; 2845 2846 uvc_debugfs_init(); 2847 2848 ret = usb_register(&uvc_driver.driver); 2849 if (ret < 0) { 2850 uvc_debugfs_cleanup(); 2851 return ret; 2852 } 2853 2854 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2855 return 0; 2856 } 2857 2858 static void __exit uvc_cleanup(void) 2859 { 2860 usb_deregister(&uvc_driver.driver); 2861 uvc_debugfs_cleanup(); 2862 } 2863 2864 module_init(uvc_init); 2865 module_exit(uvc_cleanup); 2866 2867 MODULE_AUTHOR(DRIVER_AUTHOR); 2868 MODULE_DESCRIPTION(DRIVER_DESC); 2869 MODULE_LICENSE("GPL"); 2870 MODULE_VERSION(DRIVER_VERSION); 2871 2872