1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * uvc_driver.c -- USB Video Class driver 4 * 5 * Copyright (C) 2005-2010 6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) 7 */ 8 9 #include <linux/atomic.h> 10 #include <linux/kernel.h> 11 #include <linux/list.h> 12 #include <linux/module.h> 13 #include <linux/slab.h> 14 #include <linux/usb.h> 15 #include <linux/videodev2.h> 16 #include <linux/vmalloc.h> 17 #include <linux/wait.h> 18 #include <linux/version.h> 19 #include <asm/unaligned.h> 20 21 #include <media/v4l2-common.h> 22 #include <media/v4l2-ioctl.h> 23 24 #include "uvcvideo.h" 25 26 #define DRIVER_AUTHOR "Laurent Pinchart " \ 27 "<laurent.pinchart@ideasonboard.com>" 28 #define DRIVER_DESC "USB Video Class driver" 29 30 unsigned int uvc_clock_param = CLOCK_MONOTONIC; 31 unsigned int uvc_hw_timestamps_param; 32 unsigned int uvc_no_drop_param; 33 static unsigned int uvc_quirks_param = -1; 34 unsigned int uvc_trace_param; 35 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 36 37 /* ------------------------------------------------------------------------ 38 * Video formats 39 */ 40 41 static struct uvc_format_desc uvc_fmts[] = { 42 { 43 .name = "YUV 4:2:2 (YUYV)", 44 .guid = UVC_GUID_FORMAT_YUY2, 45 .fcc = V4L2_PIX_FMT_YUYV, 46 }, 47 { 48 .name = "YUV 4:2:2 (YUYV)", 49 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 50 .fcc = V4L2_PIX_FMT_YUYV, 51 }, 52 { 53 .name = "YUV 4:2:0 (NV12)", 54 .guid = UVC_GUID_FORMAT_NV12, 55 .fcc = V4L2_PIX_FMT_NV12, 56 }, 57 { 58 .name = "MJPEG", 59 .guid = UVC_GUID_FORMAT_MJPEG, 60 .fcc = V4L2_PIX_FMT_MJPEG, 61 }, 62 { 63 .name = "YVU 4:2:0 (YV12)", 64 .guid = UVC_GUID_FORMAT_YV12, 65 .fcc = V4L2_PIX_FMT_YVU420, 66 }, 67 { 68 .name = "YUV 4:2:0 (I420)", 69 .guid = UVC_GUID_FORMAT_I420, 70 .fcc = V4L2_PIX_FMT_YUV420, 71 }, 72 { 73 .name = "YUV 4:2:0 (M420)", 74 .guid = UVC_GUID_FORMAT_M420, 75 .fcc = V4L2_PIX_FMT_M420, 76 }, 77 { 78 .name = "YUV 4:2:2 (UYVY)", 79 .guid = UVC_GUID_FORMAT_UYVY, 80 .fcc = V4L2_PIX_FMT_UYVY, 81 }, 82 { 83 .name = "Greyscale 8-bit (Y800)", 84 .guid = UVC_GUID_FORMAT_Y800, 85 .fcc = V4L2_PIX_FMT_GREY, 86 }, 87 { 88 .name = "Greyscale 8-bit (Y8 )", 89 .guid = UVC_GUID_FORMAT_Y8, 90 .fcc = V4L2_PIX_FMT_GREY, 91 }, 92 { 93 .name = "Greyscale 8-bit (D3DFMT_L8)", 94 .guid = UVC_GUID_FORMAT_D3DFMT_L8, 95 .fcc = V4L2_PIX_FMT_GREY, 96 }, 97 { 98 .name = "IR 8-bit (L8_IR)", 99 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR, 100 .fcc = V4L2_PIX_FMT_GREY, 101 }, 102 { 103 .name = "Greyscale 10-bit (Y10 )", 104 .guid = UVC_GUID_FORMAT_Y10, 105 .fcc = V4L2_PIX_FMT_Y10, 106 }, 107 { 108 .name = "Greyscale 12-bit (Y12 )", 109 .guid = UVC_GUID_FORMAT_Y12, 110 .fcc = V4L2_PIX_FMT_Y12, 111 }, 112 { 113 .name = "Greyscale 16-bit (Y16 )", 114 .guid = UVC_GUID_FORMAT_Y16, 115 .fcc = V4L2_PIX_FMT_Y16, 116 }, 117 { 118 .name = "BGGR Bayer (BY8 )", 119 .guid = UVC_GUID_FORMAT_BY8, 120 .fcc = V4L2_PIX_FMT_SBGGR8, 121 }, 122 { 123 .name = "BGGR Bayer (BA81)", 124 .guid = UVC_GUID_FORMAT_BA81, 125 .fcc = V4L2_PIX_FMT_SBGGR8, 126 }, 127 { 128 .name = "GBRG Bayer (GBRG)", 129 .guid = UVC_GUID_FORMAT_GBRG, 130 .fcc = V4L2_PIX_FMT_SGBRG8, 131 }, 132 { 133 .name = "GRBG Bayer (GRBG)", 134 .guid = UVC_GUID_FORMAT_GRBG, 135 .fcc = V4L2_PIX_FMT_SGRBG8, 136 }, 137 { 138 .name = "RGGB Bayer (RGGB)", 139 .guid = UVC_GUID_FORMAT_RGGB, 140 .fcc = V4L2_PIX_FMT_SRGGB8, 141 }, 142 { 143 .name = "RGB565", 144 .guid = UVC_GUID_FORMAT_RGBP, 145 .fcc = V4L2_PIX_FMT_RGB565, 146 }, 147 { 148 .name = "BGR 8:8:8 (BGR3)", 149 .guid = UVC_GUID_FORMAT_BGR3, 150 .fcc = V4L2_PIX_FMT_BGR24, 151 }, 152 { 153 .name = "H.264", 154 .guid = UVC_GUID_FORMAT_H264, 155 .fcc = V4L2_PIX_FMT_H264, 156 }, 157 { 158 .name = "Greyscale 8 L/R (Y8I)", 159 .guid = UVC_GUID_FORMAT_Y8I, 160 .fcc = V4L2_PIX_FMT_Y8I, 161 }, 162 { 163 .name = "Greyscale 12 L/R (Y12I)", 164 .guid = UVC_GUID_FORMAT_Y12I, 165 .fcc = V4L2_PIX_FMT_Y12I, 166 }, 167 { 168 .name = "Depth data 16-bit (Z16)", 169 .guid = UVC_GUID_FORMAT_Z16, 170 .fcc = V4L2_PIX_FMT_Z16, 171 }, 172 { 173 .name = "Bayer 10-bit (SRGGB10P)", 174 .guid = UVC_GUID_FORMAT_RW10, 175 .fcc = V4L2_PIX_FMT_SRGGB10P, 176 }, 177 { 178 .name = "Bayer 16-bit (SBGGR16)", 179 .guid = UVC_GUID_FORMAT_BG16, 180 .fcc = V4L2_PIX_FMT_SBGGR16, 181 }, 182 { 183 .name = "Bayer 16-bit (SGBRG16)", 184 .guid = UVC_GUID_FORMAT_GB16, 185 .fcc = V4L2_PIX_FMT_SGBRG16, 186 }, 187 { 188 .name = "Bayer 16-bit (SRGGB16)", 189 .guid = UVC_GUID_FORMAT_RG16, 190 .fcc = V4L2_PIX_FMT_SRGGB16, 191 }, 192 { 193 .name = "Bayer 16-bit (SGRBG16)", 194 .guid = UVC_GUID_FORMAT_GR16, 195 .fcc = V4L2_PIX_FMT_SGRBG16, 196 }, 197 { 198 .name = "Depth data 16-bit (Z16)", 199 .guid = UVC_GUID_FORMAT_INVZ, 200 .fcc = V4L2_PIX_FMT_Z16, 201 }, 202 { 203 .name = "Greyscale 10-bit (Y10 )", 204 .guid = UVC_GUID_FORMAT_INVI, 205 .fcc = V4L2_PIX_FMT_Y10, 206 }, 207 { 208 .name = "IR:Depth 26-bit (INZI)", 209 .guid = UVC_GUID_FORMAT_INZI, 210 .fcc = V4L2_PIX_FMT_INZI, 211 }, 212 { 213 .name = "4-bit Depth Confidence (Packed)", 214 .guid = UVC_GUID_FORMAT_CNF4, 215 .fcc = V4L2_PIX_FMT_CNF4, 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 * Streaming Object Management 395 */ 396 397 static void uvc_stream_delete(struct uvc_streaming *stream) 398 { 399 if (stream->async_wq) 400 destroy_workqueue(stream->async_wq); 401 402 mutex_destroy(&stream->mutex); 403 404 usb_put_intf(stream->intf); 405 406 kfree(stream->format); 407 kfree(stream->header.bmaControls); 408 kfree(stream); 409 } 410 411 static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev, 412 struct usb_interface *intf) 413 { 414 struct uvc_streaming *stream; 415 416 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 417 if (stream == NULL) 418 return NULL; 419 420 mutex_init(&stream->mutex); 421 422 stream->dev = dev; 423 stream->intf = usb_get_intf(intf); 424 stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 425 426 /* Allocate a stream specific work queue for asynchronous tasks. */ 427 stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI, 428 0); 429 if (!stream->async_wq) { 430 uvc_stream_delete(stream); 431 return NULL; 432 } 433 434 return stream; 435 } 436 437 /* ------------------------------------------------------------------------ 438 * Descriptors parsing 439 */ 440 441 static int uvc_parse_format(struct uvc_device *dev, 442 struct uvc_streaming *streaming, struct uvc_format *format, 443 u32 **intervals, unsigned char *buffer, int buflen) 444 { 445 struct usb_interface *intf = streaming->intf; 446 struct usb_host_interface *alts = intf->cur_altsetting; 447 struct uvc_format_desc *fmtdesc; 448 struct uvc_frame *frame; 449 const unsigned char *start = buffer; 450 unsigned int width_multiplier = 1; 451 unsigned int interval; 452 unsigned int i, n; 453 u8 ftype; 454 455 format->type = buffer[2]; 456 format->index = buffer[3]; 457 458 switch (buffer[2]) { 459 case UVC_VS_FORMAT_UNCOMPRESSED: 460 case UVC_VS_FORMAT_FRAME_BASED: 461 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 462 if (buflen < n) { 463 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 464 "interface %d FORMAT error\n", 465 dev->udev->devnum, 466 alts->desc.bInterfaceNumber); 467 return -EINVAL; 468 } 469 470 /* Find the format descriptor from its GUID. */ 471 fmtdesc = uvc_format_by_guid(&buffer[5]); 472 473 if (fmtdesc != NULL) { 474 strscpy(format->name, fmtdesc->name, 475 sizeof(format->name)); 476 format->fcc = fmtdesc->fcc; 477 } else { 478 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 479 &buffer[5]); 480 snprintf(format->name, sizeof(format->name), "%pUl\n", 481 &buffer[5]); 482 format->fcc = 0; 483 } 484 485 format->bpp = buffer[21]; 486 487 /* Some devices report a format that doesn't match what they 488 * really send. 489 */ 490 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 491 if (format->fcc == V4L2_PIX_FMT_YUYV) { 492 strscpy(format->name, "Greyscale 8-bit (Y8 )", 493 sizeof(format->name)); 494 format->fcc = V4L2_PIX_FMT_GREY; 495 format->bpp = 8; 496 width_multiplier = 2; 497 } 498 } 499 500 /* Some devices report bpp that doesn't match the format. */ 501 if (dev->quirks & UVC_QUIRK_FORCE_BPP) { 502 const struct v4l2_format_info *info = 503 v4l2_format_info(format->fcc); 504 505 if (info) { 506 unsigned int div = info->hdiv * info->vdiv; 507 508 n = info->bpp[0] * div; 509 for (i = 1; i < info->comp_planes; i++) 510 n += info->bpp[i]; 511 512 format->bpp = DIV_ROUND_UP(8 * n, div); 513 } 514 } 515 516 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 517 ftype = UVC_VS_FRAME_UNCOMPRESSED; 518 } else { 519 ftype = UVC_VS_FRAME_FRAME_BASED; 520 if (buffer[27]) 521 format->flags = UVC_FMT_FLAG_COMPRESSED; 522 } 523 break; 524 525 case UVC_VS_FORMAT_MJPEG: 526 if (buflen < 11) { 527 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 528 "interface %d FORMAT error\n", 529 dev->udev->devnum, 530 alts->desc.bInterfaceNumber); 531 return -EINVAL; 532 } 533 534 strscpy(format->name, "MJPEG", sizeof(format->name)); 535 format->fcc = V4L2_PIX_FMT_MJPEG; 536 format->flags = UVC_FMT_FLAG_COMPRESSED; 537 format->bpp = 0; 538 ftype = UVC_VS_FRAME_MJPEG; 539 break; 540 541 case UVC_VS_FORMAT_DV: 542 if (buflen < 9) { 543 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 544 "interface %d FORMAT error\n", 545 dev->udev->devnum, 546 alts->desc.bInterfaceNumber); 547 return -EINVAL; 548 } 549 550 switch (buffer[8] & 0x7f) { 551 case 0: 552 strscpy(format->name, "SD-DV", sizeof(format->name)); 553 break; 554 case 1: 555 strscpy(format->name, "SDL-DV", sizeof(format->name)); 556 break; 557 case 2: 558 strscpy(format->name, "HD-DV", sizeof(format->name)); 559 break; 560 default: 561 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 562 "interface %d: unknown DV format %u\n", 563 dev->udev->devnum, 564 alts->desc.bInterfaceNumber, buffer[8]); 565 return -EINVAL; 566 } 567 568 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 569 sizeof(format->name)); 570 571 format->fcc = V4L2_PIX_FMT_DV; 572 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 573 format->bpp = 0; 574 ftype = 0; 575 576 /* Create a dummy frame descriptor. */ 577 frame = &format->frame[0]; 578 memset(&format->frame[0], 0, sizeof(format->frame[0])); 579 frame->bFrameIntervalType = 1; 580 frame->dwDefaultFrameInterval = 1; 581 frame->dwFrameInterval = *intervals; 582 *(*intervals)++ = 1; 583 format->nframes = 1; 584 break; 585 586 case UVC_VS_FORMAT_MPEG2TS: 587 case UVC_VS_FORMAT_STREAM_BASED: 588 /* Not supported yet. */ 589 default: 590 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 591 "interface %d unsupported format %u\n", 592 dev->udev->devnum, alts->desc.bInterfaceNumber, 593 buffer[2]); 594 return -EINVAL; 595 } 596 597 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 598 599 buflen -= buffer[0]; 600 buffer += buffer[0]; 601 602 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 603 * based formats have frame descriptors. 604 */ 605 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 606 buffer[2] == ftype) { 607 frame = &format->frame[format->nframes]; 608 if (ftype != UVC_VS_FRAME_FRAME_BASED) 609 n = buflen > 25 ? buffer[25] : 0; 610 else 611 n = buflen > 21 ? buffer[21] : 0; 612 613 n = n ? n : 3; 614 615 if (buflen < 26 + 4*n) { 616 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 617 "interface %d FRAME error\n", dev->udev->devnum, 618 alts->desc.bInterfaceNumber); 619 return -EINVAL; 620 } 621 622 frame->bFrameIndex = buffer[3]; 623 frame->bmCapabilities = buffer[4]; 624 frame->wWidth = get_unaligned_le16(&buffer[5]) 625 * width_multiplier; 626 frame->wHeight = get_unaligned_le16(&buffer[7]); 627 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 628 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 629 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 630 frame->dwMaxVideoFrameBufferSize = 631 get_unaligned_le32(&buffer[17]); 632 frame->dwDefaultFrameInterval = 633 get_unaligned_le32(&buffer[21]); 634 frame->bFrameIntervalType = buffer[25]; 635 } else { 636 frame->dwMaxVideoFrameBufferSize = 0; 637 frame->dwDefaultFrameInterval = 638 get_unaligned_le32(&buffer[17]); 639 frame->bFrameIntervalType = buffer[21]; 640 } 641 frame->dwFrameInterval = *intervals; 642 643 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 644 * completely. Observed behaviours range from setting the 645 * value to 1.1x the actual frame size to hardwiring the 646 * 16 low bits to 0. This results in a higher than necessary 647 * memory usage as well as a wrong image size information. For 648 * uncompressed formats this can be fixed by computing the 649 * value from the frame size. 650 */ 651 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 652 frame->dwMaxVideoFrameBufferSize = format->bpp 653 * frame->wWidth * frame->wHeight / 8; 654 655 /* Some bogus devices report dwMinFrameInterval equal to 656 * dwMaxFrameInterval and have dwFrameIntervalStep set to 657 * zero. Setting all null intervals to 1 fixes the problem and 658 * some other divisions by zero that could happen. 659 */ 660 for (i = 0; i < n; ++i) { 661 interval = get_unaligned_le32(&buffer[26+4*i]); 662 *(*intervals)++ = interval ? interval : 1; 663 } 664 665 /* Make sure that the default frame interval stays between 666 * the boundaries. 667 */ 668 n -= frame->bFrameIntervalType ? 1 : 2; 669 frame->dwDefaultFrameInterval = 670 min(frame->dwFrameInterval[n], 671 max(frame->dwFrameInterval[0], 672 frame->dwDefaultFrameInterval)); 673 674 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 675 frame->bFrameIntervalType = 1; 676 frame->dwFrameInterval[0] = 677 frame->dwDefaultFrameInterval; 678 } 679 680 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 681 frame->wWidth, frame->wHeight, 682 10000000/frame->dwDefaultFrameInterval, 683 (100000000/frame->dwDefaultFrameInterval)%10); 684 685 format->nframes++; 686 buflen -= buffer[0]; 687 buffer += buffer[0]; 688 } 689 690 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 691 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 692 buflen -= buffer[0]; 693 buffer += buffer[0]; 694 } 695 696 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 697 buffer[2] == UVC_VS_COLORFORMAT) { 698 if (buflen < 6) { 699 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 700 "interface %d COLORFORMAT error\n", 701 dev->udev->devnum, 702 alts->desc.bInterfaceNumber); 703 return -EINVAL; 704 } 705 706 format->colorspace = uvc_colorspace(buffer[3]); 707 708 buflen -= buffer[0]; 709 buffer += buffer[0]; 710 } 711 712 return buffer - start; 713 } 714 715 static int uvc_parse_streaming(struct uvc_device *dev, 716 struct usb_interface *intf) 717 { 718 struct uvc_streaming *streaming = NULL; 719 struct uvc_format *format; 720 struct uvc_frame *frame; 721 struct usb_host_interface *alts = &intf->altsetting[0]; 722 unsigned char *_buffer, *buffer = alts->extra; 723 int _buflen, buflen = alts->extralen; 724 unsigned int nformats = 0, nframes = 0, nintervals = 0; 725 unsigned int size, i, n, p; 726 u32 *interval; 727 u16 psize; 728 int ret = -EINVAL; 729 730 if (intf->cur_altsetting->desc.bInterfaceSubClass 731 != UVC_SC_VIDEOSTREAMING) { 732 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 733 "video streaming interface\n", dev->udev->devnum, 734 intf->altsetting[0].desc.bInterfaceNumber); 735 return -EINVAL; 736 } 737 738 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 739 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 740 "claimed\n", dev->udev->devnum, 741 intf->altsetting[0].desc.bInterfaceNumber); 742 return -EINVAL; 743 } 744 745 streaming = uvc_stream_new(dev, intf); 746 if (streaming == NULL) { 747 usb_driver_release_interface(&uvc_driver.driver, intf); 748 return -ENOMEM; 749 } 750 751 /* The Pico iMage webcam has its class-specific interface descriptors 752 * after the endpoint descriptors. 753 */ 754 if (buflen == 0) { 755 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 756 struct usb_host_endpoint *ep = &alts->endpoint[i]; 757 758 if (ep->extralen == 0) 759 continue; 760 761 if (ep->extralen > 2 && 762 ep->extra[1] == USB_DT_CS_INTERFACE) { 763 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 764 "from endpoint %u.\n", i); 765 buffer = alts->endpoint[i].extra; 766 buflen = alts->endpoint[i].extralen; 767 break; 768 } 769 } 770 } 771 772 /* Skip the standard interface descriptors. */ 773 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 774 buflen -= buffer[0]; 775 buffer += buffer[0]; 776 } 777 778 if (buflen <= 2) { 779 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 780 "interface descriptors found.\n"); 781 goto error; 782 } 783 784 /* Parse the header descriptor. */ 785 switch (buffer[2]) { 786 case UVC_VS_OUTPUT_HEADER: 787 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 788 size = 9; 789 break; 790 791 case UVC_VS_INPUT_HEADER: 792 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 793 size = 13; 794 break; 795 796 default: 797 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 798 "%d HEADER descriptor not found.\n", dev->udev->devnum, 799 alts->desc.bInterfaceNumber); 800 goto error; 801 } 802 803 p = buflen >= 4 ? buffer[3] : 0; 804 n = buflen >= size ? buffer[size-1] : 0; 805 806 if (buflen < size + p*n) { 807 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 808 "interface %d HEADER descriptor is invalid.\n", 809 dev->udev->devnum, alts->desc.bInterfaceNumber); 810 goto error; 811 } 812 813 streaming->header.bNumFormats = p; 814 streaming->header.bEndpointAddress = buffer[6]; 815 if (buffer[2] == UVC_VS_INPUT_HEADER) { 816 streaming->header.bmInfo = buffer[7]; 817 streaming->header.bTerminalLink = buffer[8]; 818 streaming->header.bStillCaptureMethod = buffer[9]; 819 streaming->header.bTriggerSupport = buffer[10]; 820 streaming->header.bTriggerUsage = buffer[11]; 821 } else { 822 streaming->header.bTerminalLink = buffer[7]; 823 } 824 streaming->header.bControlSize = n; 825 826 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 827 GFP_KERNEL); 828 if (streaming->header.bmaControls == NULL) { 829 ret = -ENOMEM; 830 goto error; 831 } 832 833 buflen -= buffer[0]; 834 buffer += buffer[0]; 835 836 _buffer = buffer; 837 _buflen = buflen; 838 839 /* Count the format and frame descriptors. */ 840 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 841 switch (_buffer[2]) { 842 case UVC_VS_FORMAT_UNCOMPRESSED: 843 case UVC_VS_FORMAT_MJPEG: 844 case UVC_VS_FORMAT_FRAME_BASED: 845 nformats++; 846 break; 847 848 case UVC_VS_FORMAT_DV: 849 /* DV format has no frame descriptor. We will create a 850 * dummy frame descriptor with a dummy frame interval. 851 */ 852 nformats++; 853 nframes++; 854 nintervals++; 855 break; 856 857 case UVC_VS_FORMAT_MPEG2TS: 858 case UVC_VS_FORMAT_STREAM_BASED: 859 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 860 "interface %d FORMAT %u is not supported.\n", 861 dev->udev->devnum, 862 alts->desc.bInterfaceNumber, _buffer[2]); 863 break; 864 865 case UVC_VS_FRAME_UNCOMPRESSED: 866 case UVC_VS_FRAME_MJPEG: 867 nframes++; 868 if (_buflen > 25) 869 nintervals += _buffer[25] ? _buffer[25] : 3; 870 break; 871 872 case UVC_VS_FRAME_FRAME_BASED: 873 nframes++; 874 if (_buflen > 21) 875 nintervals += _buffer[21] ? _buffer[21] : 3; 876 break; 877 } 878 879 _buflen -= _buffer[0]; 880 _buffer += _buffer[0]; 881 } 882 883 if (nformats == 0) { 884 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 885 "%d has no supported formats defined.\n", 886 dev->udev->devnum, alts->desc.bInterfaceNumber); 887 goto error; 888 } 889 890 size = nformats * sizeof(*format) + nframes * sizeof(*frame) 891 + nintervals * sizeof(*interval); 892 format = kzalloc(size, GFP_KERNEL); 893 if (format == NULL) { 894 ret = -ENOMEM; 895 goto error; 896 } 897 898 frame = (struct uvc_frame *)&format[nformats]; 899 interval = (u32 *)&frame[nframes]; 900 901 streaming->format = format; 902 streaming->nformats = nformats; 903 904 /* Parse the format descriptors. */ 905 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 906 switch (buffer[2]) { 907 case UVC_VS_FORMAT_UNCOMPRESSED: 908 case UVC_VS_FORMAT_MJPEG: 909 case UVC_VS_FORMAT_DV: 910 case UVC_VS_FORMAT_FRAME_BASED: 911 format->frame = frame; 912 ret = uvc_parse_format(dev, streaming, format, 913 &interval, buffer, buflen); 914 if (ret < 0) 915 goto error; 916 917 frame += format->nframes; 918 format++; 919 920 buflen -= ret; 921 buffer += ret; 922 continue; 923 924 default: 925 break; 926 } 927 928 buflen -= buffer[0]; 929 buffer += buffer[0]; 930 } 931 932 if (buflen) 933 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 934 "%d has %u bytes of trailing descriptor garbage.\n", 935 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 936 937 /* Parse the alternate settings to find the maximum bandwidth. */ 938 for (i = 0; i < intf->num_altsetting; ++i) { 939 struct usb_host_endpoint *ep; 940 alts = &intf->altsetting[i]; 941 ep = uvc_find_endpoint(alts, 942 streaming->header.bEndpointAddress); 943 if (ep == NULL) 944 continue; 945 946 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 947 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 948 if (psize > streaming->maxpsize) 949 streaming->maxpsize = psize; 950 } 951 952 list_add_tail(&streaming->list, &dev->streams); 953 return 0; 954 955 error: 956 usb_driver_release_interface(&uvc_driver.driver, intf); 957 uvc_stream_delete(streaming); 958 return ret; 959 } 960 961 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 962 unsigned int num_pads, unsigned int extra_size) 963 { 964 struct uvc_entity *entity; 965 unsigned int num_inputs; 966 unsigned int size; 967 unsigned int i; 968 969 extra_size = roundup(extra_size, sizeof(*entity->pads)); 970 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 971 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 972 + num_inputs; 973 entity = kzalloc(size, GFP_KERNEL); 974 if (entity == NULL) 975 return NULL; 976 977 entity->id = id; 978 entity->type = type; 979 980 entity->num_links = 0; 981 entity->num_pads = num_pads; 982 entity->pads = ((void *)(entity + 1)) + extra_size; 983 984 for (i = 0; i < num_inputs; ++i) 985 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 986 if (!UVC_ENTITY_IS_OTERM(entity)) 987 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 988 989 entity->bNrInPins = num_inputs; 990 entity->baSourceID = (u8 *)(&entity->pads[num_pads]); 991 992 return entity; 993 } 994 995 /* Parse vendor-specific extensions. */ 996 static int uvc_parse_vendor_control(struct uvc_device *dev, 997 const unsigned char *buffer, int buflen) 998 { 999 struct usb_device *udev = dev->udev; 1000 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1001 struct uvc_entity *unit; 1002 unsigned int n, p; 1003 int handled = 0; 1004 1005 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 1006 case 0x046d: /* Logitech */ 1007 if (buffer[1] != 0x41 || buffer[2] != 0x01) 1008 break; 1009 1010 /* Logitech implements several vendor specific functions 1011 * through vendor specific extension units (LXU). 1012 * 1013 * The LXU descriptors are similar to XU descriptors 1014 * (see "USB Device Video Class for Video Devices", section 1015 * 3.7.2.6 "Extension Unit Descriptor") with the following 1016 * differences: 1017 * 1018 * ---------------------------------------------------------- 1019 * 0 bLength 1 Number 1020 * Size of this descriptor, in bytes: 24+p+n*2 1021 * ---------------------------------------------------------- 1022 * 23+p+n bmControlsType N Bitmap 1023 * Individual bits in the set are defined: 1024 * 0: Absolute 1025 * 1: Relative 1026 * 1027 * This bitset is mapped exactly the same as bmControls. 1028 * ---------------------------------------------------------- 1029 * 23+p+n*2 bReserved 1 Boolean 1030 * ---------------------------------------------------------- 1031 * 24+p+n*2 iExtension 1 Index 1032 * Index of a string descriptor that describes this 1033 * extension unit. 1034 * ---------------------------------------------------------- 1035 */ 1036 p = buflen >= 22 ? buffer[21] : 0; 1037 n = buflen >= 25 + p ? buffer[22+p] : 0; 1038 1039 if (buflen < 25 + p + 2*n) { 1040 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1041 "interface %d EXTENSION_UNIT error\n", 1042 udev->devnum, alts->desc.bInterfaceNumber); 1043 break; 1044 } 1045 1046 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 1047 p + 1, 2*n); 1048 if (unit == NULL) 1049 return -ENOMEM; 1050 1051 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1052 unit->extension.bNumControls = buffer[20]; 1053 memcpy(unit->baSourceID, &buffer[22], p); 1054 unit->extension.bControlSize = buffer[22+p]; 1055 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1056 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit) 1057 + n; 1058 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 1059 1060 if (buffer[24+p+2*n] != 0) 1061 usb_string(udev, buffer[24+p+2*n], unit->name, 1062 sizeof(unit->name)); 1063 else 1064 sprintf(unit->name, "Extension %u", buffer[3]); 1065 1066 list_add_tail(&unit->list, &dev->entities); 1067 handled = 1; 1068 break; 1069 } 1070 1071 return handled; 1072 } 1073 1074 static int uvc_parse_standard_control(struct uvc_device *dev, 1075 const unsigned char *buffer, int buflen) 1076 { 1077 struct usb_device *udev = dev->udev; 1078 struct uvc_entity *unit, *term; 1079 struct usb_interface *intf; 1080 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1081 unsigned int i, n, p, len; 1082 u16 type; 1083 1084 switch (buffer[2]) { 1085 case UVC_VC_HEADER: 1086 n = buflen >= 12 ? buffer[11] : 0; 1087 1088 if (buflen < 12 + n) { 1089 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1090 "interface %d HEADER error\n", udev->devnum, 1091 alts->desc.bInterfaceNumber); 1092 return -EINVAL; 1093 } 1094 1095 dev->uvc_version = get_unaligned_le16(&buffer[3]); 1096 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 1097 1098 /* Parse all USB Video Streaming interfaces. */ 1099 for (i = 0; i < n; ++i) { 1100 intf = usb_ifnum_to_if(udev, buffer[12+i]); 1101 if (intf == NULL) { 1102 uvc_trace(UVC_TRACE_DESCR, "device %d " 1103 "interface %d doesn't exists\n", 1104 udev->devnum, i); 1105 continue; 1106 } 1107 1108 uvc_parse_streaming(dev, intf); 1109 } 1110 break; 1111 1112 case UVC_VC_INPUT_TERMINAL: 1113 if (buflen < 8) { 1114 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1115 "interface %d INPUT_TERMINAL error\n", 1116 udev->devnum, alts->desc.bInterfaceNumber); 1117 return -EINVAL; 1118 } 1119 1120 /* 1121 * Reject invalid terminal types that would cause issues: 1122 * 1123 * - The high byte must be non-zero, otherwise it would be 1124 * confused with a unit. 1125 * 1126 * - Bit 15 must be 0, as we use it internally as a terminal 1127 * direction flag. 1128 * 1129 * Other unknown types are accepted. 1130 */ 1131 type = get_unaligned_le16(&buffer[4]); 1132 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) { 1133 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1134 "interface %d INPUT_TERMINAL %d has invalid " 1135 "type 0x%04x, skipping\n", udev->devnum, 1136 alts->desc.bInterfaceNumber, 1137 buffer[3], type); 1138 return 0; 1139 } 1140 1141 n = 0; 1142 p = 0; 1143 len = 8; 1144 1145 if (type == UVC_ITT_CAMERA) { 1146 n = buflen >= 15 ? buffer[14] : 0; 1147 len = 15; 1148 1149 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1150 n = buflen >= 9 ? buffer[8] : 0; 1151 p = buflen >= 10 + n ? buffer[9+n] : 0; 1152 len = 10; 1153 } 1154 1155 if (buflen < len + n + p) { 1156 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1157 "interface %d INPUT_TERMINAL error\n", 1158 udev->devnum, alts->desc.bInterfaceNumber); 1159 return -EINVAL; 1160 } 1161 1162 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1163 1, n + p); 1164 if (term == NULL) 1165 return -ENOMEM; 1166 1167 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1168 term->camera.bControlSize = n; 1169 term->camera.bmControls = (u8 *)term + sizeof(*term); 1170 term->camera.wObjectiveFocalLengthMin = 1171 get_unaligned_le16(&buffer[8]); 1172 term->camera.wObjectiveFocalLengthMax = 1173 get_unaligned_le16(&buffer[10]); 1174 term->camera.wOcularFocalLength = 1175 get_unaligned_le16(&buffer[12]); 1176 memcpy(term->camera.bmControls, &buffer[15], n); 1177 } else if (UVC_ENTITY_TYPE(term) == 1178 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1179 term->media.bControlSize = n; 1180 term->media.bmControls = (u8 *)term + sizeof(*term); 1181 term->media.bTransportModeSize = p; 1182 term->media.bmTransportModes = (u8 *)term 1183 + sizeof(*term) + n; 1184 memcpy(term->media.bmControls, &buffer[9], n); 1185 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1186 } 1187 1188 if (buffer[7] != 0) 1189 usb_string(udev, buffer[7], term->name, 1190 sizeof(term->name)); 1191 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1192 sprintf(term->name, "Camera %u", buffer[3]); 1193 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1194 sprintf(term->name, "Media %u", buffer[3]); 1195 else 1196 sprintf(term->name, "Input %u", buffer[3]); 1197 1198 list_add_tail(&term->list, &dev->entities); 1199 break; 1200 1201 case UVC_VC_OUTPUT_TERMINAL: 1202 if (buflen < 9) { 1203 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1204 "interface %d OUTPUT_TERMINAL error\n", 1205 udev->devnum, alts->desc.bInterfaceNumber); 1206 return -EINVAL; 1207 } 1208 1209 /* Make sure the terminal type MSB is not null, otherwise it 1210 * could be confused with a unit. 1211 */ 1212 type = get_unaligned_le16(&buffer[4]); 1213 if ((type & 0xff00) == 0) { 1214 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1215 "interface %d OUTPUT_TERMINAL %d has invalid " 1216 "type 0x%04x, skipping\n", udev->devnum, 1217 alts->desc.bInterfaceNumber, buffer[3], type); 1218 return 0; 1219 } 1220 1221 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1222 1, 0); 1223 if (term == NULL) 1224 return -ENOMEM; 1225 1226 memcpy(term->baSourceID, &buffer[7], 1); 1227 1228 if (buffer[8] != 0) 1229 usb_string(udev, buffer[8], term->name, 1230 sizeof(term->name)); 1231 else 1232 sprintf(term->name, "Output %u", buffer[3]); 1233 1234 list_add_tail(&term->list, &dev->entities); 1235 break; 1236 1237 case UVC_VC_SELECTOR_UNIT: 1238 p = buflen >= 5 ? buffer[4] : 0; 1239 1240 if (buflen < 5 || buflen < 6 + p) { 1241 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1242 "interface %d SELECTOR_UNIT error\n", 1243 udev->devnum, alts->desc.bInterfaceNumber); 1244 return -EINVAL; 1245 } 1246 1247 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1248 if (unit == NULL) 1249 return -ENOMEM; 1250 1251 memcpy(unit->baSourceID, &buffer[5], p); 1252 1253 if (buffer[5+p] != 0) 1254 usb_string(udev, buffer[5+p], unit->name, 1255 sizeof(unit->name)); 1256 else 1257 sprintf(unit->name, "Selector %u", buffer[3]); 1258 1259 list_add_tail(&unit->list, &dev->entities); 1260 break; 1261 1262 case UVC_VC_PROCESSING_UNIT: 1263 n = buflen >= 8 ? buffer[7] : 0; 1264 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1265 1266 if (buflen < p + n) { 1267 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1268 "interface %d PROCESSING_UNIT error\n", 1269 udev->devnum, alts->desc.bInterfaceNumber); 1270 return -EINVAL; 1271 } 1272 1273 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1274 if (unit == NULL) 1275 return -ENOMEM; 1276 1277 memcpy(unit->baSourceID, &buffer[4], 1); 1278 unit->processing.wMaxMultiplier = 1279 get_unaligned_le16(&buffer[5]); 1280 unit->processing.bControlSize = buffer[7]; 1281 unit->processing.bmControls = (u8 *)unit + sizeof(*unit); 1282 memcpy(unit->processing.bmControls, &buffer[8], n); 1283 if (dev->uvc_version >= 0x0110) 1284 unit->processing.bmVideoStandards = buffer[9+n]; 1285 1286 if (buffer[8+n] != 0) 1287 usb_string(udev, buffer[8+n], unit->name, 1288 sizeof(unit->name)); 1289 else 1290 sprintf(unit->name, "Processing %u", buffer[3]); 1291 1292 list_add_tail(&unit->list, &dev->entities); 1293 break; 1294 1295 case UVC_VC_EXTENSION_UNIT: 1296 p = buflen >= 22 ? buffer[21] : 0; 1297 n = buflen >= 24 + p ? buffer[22+p] : 0; 1298 1299 if (buflen < 24 + p + n) { 1300 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1301 "interface %d EXTENSION_UNIT error\n", 1302 udev->devnum, alts->desc.bInterfaceNumber); 1303 return -EINVAL; 1304 } 1305 1306 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1307 if (unit == NULL) 1308 return -ENOMEM; 1309 1310 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1311 unit->extension.bNumControls = buffer[20]; 1312 memcpy(unit->baSourceID, &buffer[22], p); 1313 unit->extension.bControlSize = buffer[22+p]; 1314 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1315 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1316 1317 if (buffer[23+p+n] != 0) 1318 usb_string(udev, buffer[23+p+n], unit->name, 1319 sizeof(unit->name)); 1320 else 1321 sprintf(unit->name, "Extension %u", buffer[3]); 1322 1323 list_add_tail(&unit->list, &dev->entities); 1324 break; 1325 1326 default: 1327 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1328 "descriptor (%u)\n", buffer[2]); 1329 break; 1330 } 1331 1332 return 0; 1333 } 1334 1335 static int uvc_parse_control(struct uvc_device *dev) 1336 { 1337 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1338 unsigned char *buffer = alts->extra; 1339 int buflen = alts->extralen; 1340 int ret; 1341 1342 /* Parse the default alternate setting only, as the UVC specification 1343 * defines a single alternate setting, the default alternate setting 1344 * zero. 1345 */ 1346 1347 while (buflen > 2) { 1348 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1349 buffer[1] != USB_DT_CS_INTERFACE) 1350 goto next_descriptor; 1351 1352 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1353 return ret; 1354 1355 next_descriptor: 1356 buflen -= buffer[0]; 1357 buffer += buffer[0]; 1358 } 1359 1360 /* Check if the optional status endpoint is present. Built-in iSight 1361 * webcams have an interrupt endpoint but spit proprietary data that 1362 * don't conform to the UVC status endpoint messages. Don't try to 1363 * handle the interrupt endpoint for those cameras. 1364 */ 1365 if (alts->desc.bNumEndpoints == 1 && 1366 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1367 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1368 struct usb_endpoint_descriptor *desc = &ep->desc; 1369 1370 if (usb_endpoint_is_int_in(desc) && 1371 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1372 desc->bInterval != 0) { 1373 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1374 "(addr %02x).\n", desc->bEndpointAddress); 1375 dev->int_ep = ep; 1376 } 1377 } 1378 1379 return 0; 1380 } 1381 1382 /* ------------------------------------------------------------------------ 1383 * UVC device scan 1384 */ 1385 1386 /* 1387 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1388 * and containing the following units: 1389 * 1390 * - one or more Output Terminals (USB Streaming or Display) 1391 * - zero or one Processing Unit 1392 * - zero, one or more single-input Selector Units 1393 * - zero or one multiple-input Selector Units, provided all inputs are 1394 * connected to input terminals 1395 * - zero, one or mode single-input Extension Units 1396 * - one or more Input Terminals (Camera, External or USB Streaming) 1397 * 1398 * The terminal and units must match on of the following structures: 1399 * 1400 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1401 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1402 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1403 * 1404 * +---------+ +---------+ -> OTT_*(0) 1405 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1406 * +---------+ +---------+ -> OTT_*(n) 1407 * 1408 * The Processing Unit and Extension Units can be in any order. Additional 1409 * Extension Units connected to the main chain as single-unit branches are 1410 * also supported. Single-input Selector Units are ignored. 1411 */ 1412 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1413 struct uvc_entity *entity) 1414 { 1415 switch (UVC_ENTITY_TYPE(entity)) { 1416 case UVC_VC_EXTENSION_UNIT: 1417 if (uvc_trace_param & UVC_TRACE_PROBE) 1418 printk(KERN_CONT " <- XU %d", entity->id); 1419 1420 if (entity->bNrInPins != 1) { 1421 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1422 "than 1 input pin.\n", entity->id); 1423 return -1; 1424 } 1425 1426 break; 1427 1428 case UVC_VC_PROCESSING_UNIT: 1429 if (uvc_trace_param & UVC_TRACE_PROBE) 1430 printk(KERN_CONT " <- PU %d", entity->id); 1431 1432 if (chain->processing != NULL) { 1433 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1434 "Processing Units in chain.\n"); 1435 return -1; 1436 } 1437 1438 chain->processing = entity; 1439 break; 1440 1441 case UVC_VC_SELECTOR_UNIT: 1442 if (uvc_trace_param & UVC_TRACE_PROBE) 1443 printk(KERN_CONT " <- SU %d", entity->id); 1444 1445 /* Single-input selector units are ignored. */ 1446 if (entity->bNrInPins == 1) 1447 break; 1448 1449 if (chain->selector != NULL) { 1450 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1451 "Units in chain.\n"); 1452 return -1; 1453 } 1454 1455 chain->selector = entity; 1456 break; 1457 1458 case UVC_ITT_VENDOR_SPECIFIC: 1459 case UVC_ITT_CAMERA: 1460 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1461 if (uvc_trace_param & UVC_TRACE_PROBE) 1462 printk(KERN_CONT " <- IT %d\n", entity->id); 1463 1464 break; 1465 1466 case UVC_OTT_VENDOR_SPECIFIC: 1467 case UVC_OTT_DISPLAY: 1468 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1469 if (uvc_trace_param & UVC_TRACE_PROBE) 1470 printk(KERN_CONT " OT %d", entity->id); 1471 1472 break; 1473 1474 case UVC_TT_STREAMING: 1475 if (UVC_ENTITY_IS_ITERM(entity)) { 1476 if (uvc_trace_param & UVC_TRACE_PROBE) 1477 printk(KERN_CONT " <- IT %d\n", entity->id); 1478 } else { 1479 if (uvc_trace_param & UVC_TRACE_PROBE) 1480 printk(KERN_CONT " OT %d", entity->id); 1481 } 1482 1483 break; 1484 1485 default: 1486 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1487 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1488 return -1; 1489 } 1490 1491 list_add_tail(&entity->chain, &chain->entities); 1492 return 0; 1493 } 1494 1495 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1496 struct uvc_entity *entity, struct uvc_entity *prev) 1497 { 1498 struct uvc_entity *forward; 1499 int found; 1500 1501 /* Forward scan */ 1502 forward = NULL; 1503 found = 0; 1504 1505 while (1) { 1506 forward = uvc_entity_by_reference(chain->dev, entity->id, 1507 forward); 1508 if (forward == NULL) 1509 break; 1510 if (forward == prev) 1511 continue; 1512 if (forward->chain.next || forward->chain.prev) { 1513 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1514 "entity %d already in chain.\n", forward->id); 1515 return -EINVAL; 1516 } 1517 1518 switch (UVC_ENTITY_TYPE(forward)) { 1519 case UVC_VC_EXTENSION_UNIT: 1520 if (forward->bNrInPins != 1) { 1521 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1522 "has more than 1 input pin.\n", 1523 entity->id); 1524 return -EINVAL; 1525 } 1526 1527 list_add_tail(&forward->chain, &chain->entities); 1528 if (uvc_trace_param & UVC_TRACE_PROBE) { 1529 if (!found) 1530 printk(KERN_CONT " (->"); 1531 1532 printk(KERN_CONT " XU %d", forward->id); 1533 found = 1; 1534 } 1535 break; 1536 1537 case UVC_OTT_VENDOR_SPECIFIC: 1538 case UVC_OTT_DISPLAY: 1539 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1540 case UVC_TT_STREAMING: 1541 if (UVC_ENTITY_IS_ITERM(forward)) { 1542 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1543 "terminal %u.\n", forward->id); 1544 return -EINVAL; 1545 } 1546 1547 list_add_tail(&forward->chain, &chain->entities); 1548 if (uvc_trace_param & UVC_TRACE_PROBE) { 1549 if (!found) 1550 printk(KERN_CONT " (->"); 1551 1552 printk(KERN_CONT " OT %d", forward->id); 1553 found = 1; 1554 } 1555 break; 1556 } 1557 } 1558 if (found) 1559 printk(KERN_CONT ")"); 1560 1561 return 0; 1562 } 1563 1564 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1565 struct uvc_entity **_entity) 1566 { 1567 struct uvc_entity *entity = *_entity; 1568 struct uvc_entity *term; 1569 int id = -EINVAL, i; 1570 1571 switch (UVC_ENTITY_TYPE(entity)) { 1572 case UVC_VC_EXTENSION_UNIT: 1573 case UVC_VC_PROCESSING_UNIT: 1574 id = entity->baSourceID[0]; 1575 break; 1576 1577 case UVC_VC_SELECTOR_UNIT: 1578 /* Single-input selector units are ignored. */ 1579 if (entity->bNrInPins == 1) { 1580 id = entity->baSourceID[0]; 1581 break; 1582 } 1583 1584 if (uvc_trace_param & UVC_TRACE_PROBE) 1585 printk(KERN_CONT " <- IT"); 1586 1587 chain->selector = entity; 1588 for (i = 0; i < entity->bNrInPins; ++i) { 1589 id = entity->baSourceID[i]; 1590 term = uvc_entity_by_id(chain->dev, id); 1591 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1592 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1593 "input %d isn't connected to an " 1594 "input terminal\n", entity->id, i); 1595 return -1; 1596 } 1597 1598 if (term->chain.next || term->chain.prev) { 1599 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1600 "entity %d already in chain.\n", 1601 term->id); 1602 return -EINVAL; 1603 } 1604 1605 if (uvc_trace_param & UVC_TRACE_PROBE) 1606 printk(KERN_CONT " %d", term->id); 1607 1608 list_add_tail(&term->chain, &chain->entities); 1609 uvc_scan_chain_forward(chain, term, entity); 1610 } 1611 1612 if (uvc_trace_param & UVC_TRACE_PROBE) 1613 printk(KERN_CONT "\n"); 1614 1615 id = 0; 1616 break; 1617 1618 case UVC_ITT_VENDOR_SPECIFIC: 1619 case UVC_ITT_CAMERA: 1620 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1621 case UVC_OTT_VENDOR_SPECIFIC: 1622 case UVC_OTT_DISPLAY: 1623 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1624 case UVC_TT_STREAMING: 1625 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1626 break; 1627 } 1628 1629 if (id <= 0) { 1630 *_entity = NULL; 1631 return id; 1632 } 1633 1634 entity = uvc_entity_by_id(chain->dev, id); 1635 if (entity == NULL) { 1636 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1637 "unknown entity %d.\n", id); 1638 return -EINVAL; 1639 } 1640 1641 *_entity = entity; 1642 return 0; 1643 } 1644 1645 static int uvc_scan_chain(struct uvc_video_chain *chain, 1646 struct uvc_entity *term) 1647 { 1648 struct uvc_entity *entity, *prev; 1649 1650 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1651 1652 entity = term; 1653 prev = NULL; 1654 1655 while (entity != NULL) { 1656 /* Entity must not be part of an existing chain */ 1657 if (entity->chain.next || entity->chain.prev) { 1658 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1659 "entity %d already in chain.\n", entity->id); 1660 return -EINVAL; 1661 } 1662 1663 /* Process entity */ 1664 if (uvc_scan_chain_entity(chain, entity) < 0) 1665 return -EINVAL; 1666 1667 /* Forward scan */ 1668 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1669 return -EINVAL; 1670 1671 /* Backward scan */ 1672 prev = entity; 1673 if (uvc_scan_chain_backward(chain, &entity) < 0) 1674 return -EINVAL; 1675 } 1676 1677 return 0; 1678 } 1679 1680 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1681 char *buffer) 1682 { 1683 struct uvc_entity *term; 1684 unsigned int nterms = 0; 1685 char *p = buffer; 1686 1687 list_for_each_entry(term, terms, chain) { 1688 if (!UVC_ENTITY_IS_TERM(term) || 1689 UVC_TERM_DIRECTION(term) != dir) 1690 continue; 1691 1692 if (nterms) 1693 p += sprintf(p, ","); 1694 if (++nterms >= 4) { 1695 p += sprintf(p, "..."); 1696 break; 1697 } 1698 p += sprintf(p, "%u", term->id); 1699 } 1700 1701 return p - buffer; 1702 } 1703 1704 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1705 { 1706 static char buffer[43]; 1707 char *p = buffer; 1708 1709 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1710 p += sprintf(p, " -> "); 1711 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1712 1713 return buffer; 1714 } 1715 1716 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev) 1717 { 1718 struct uvc_video_chain *chain; 1719 1720 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1721 if (chain == NULL) 1722 return NULL; 1723 1724 INIT_LIST_HEAD(&chain->entities); 1725 mutex_init(&chain->ctrl_mutex); 1726 chain->dev = dev; 1727 v4l2_prio_init(&chain->prio); 1728 1729 return chain; 1730 } 1731 1732 /* 1733 * Fallback heuristic for devices that don't connect units and terminals in a 1734 * valid chain. 1735 * 1736 * Some devices have invalid baSourceID references, causing uvc_scan_chain() 1737 * to fail, but if we just take the entities we can find and put them together 1738 * in the most sensible chain we can think of, turns out they do work anyway. 1739 * Note: This heuristic assumes there is a single chain. 1740 * 1741 * At the time of writing, devices known to have such a broken chain are 1742 * - Acer Integrated Camera (5986:055a) 1743 * - Realtek rtl157a7 (0bda:57a7) 1744 */ 1745 static int uvc_scan_fallback(struct uvc_device *dev) 1746 { 1747 struct uvc_video_chain *chain; 1748 struct uvc_entity *iterm = NULL; 1749 struct uvc_entity *oterm = NULL; 1750 struct uvc_entity *entity; 1751 struct uvc_entity *prev; 1752 1753 /* 1754 * Start by locating the input and output terminals. We only support 1755 * devices with exactly one of each for now. 1756 */ 1757 list_for_each_entry(entity, &dev->entities, list) { 1758 if (UVC_ENTITY_IS_ITERM(entity)) { 1759 if (iterm) 1760 return -EINVAL; 1761 iterm = entity; 1762 } 1763 1764 if (UVC_ENTITY_IS_OTERM(entity)) { 1765 if (oterm) 1766 return -EINVAL; 1767 oterm = entity; 1768 } 1769 } 1770 1771 if (iterm == NULL || oterm == NULL) 1772 return -EINVAL; 1773 1774 /* Allocate the chain and fill it. */ 1775 chain = uvc_alloc_chain(dev); 1776 if (chain == NULL) 1777 return -ENOMEM; 1778 1779 if (uvc_scan_chain_entity(chain, oterm) < 0) 1780 goto error; 1781 1782 prev = oterm; 1783 1784 /* 1785 * Add all Processing and Extension Units with two pads. The order 1786 * doesn't matter much, use reverse list traversal to connect units in 1787 * UVC descriptor order as we build the chain from output to input. This 1788 * leads to units appearing in the order meant by the manufacturer for 1789 * the cameras known to require this heuristic. 1790 */ 1791 list_for_each_entry_reverse(entity, &dev->entities, list) { 1792 if (entity->type != UVC_VC_PROCESSING_UNIT && 1793 entity->type != UVC_VC_EXTENSION_UNIT) 1794 continue; 1795 1796 if (entity->num_pads != 2) 1797 continue; 1798 1799 if (uvc_scan_chain_entity(chain, entity) < 0) 1800 goto error; 1801 1802 prev->baSourceID[0] = entity->id; 1803 prev = entity; 1804 } 1805 1806 if (uvc_scan_chain_entity(chain, iterm) < 0) 1807 goto error; 1808 1809 prev->baSourceID[0] = iterm->id; 1810 1811 list_add_tail(&chain->list, &dev->chains); 1812 1813 uvc_trace(UVC_TRACE_PROBE, 1814 "Found a video chain by fallback heuristic (%s).\n", 1815 uvc_print_chain(chain)); 1816 1817 return 0; 1818 1819 error: 1820 kfree(chain); 1821 return -EINVAL; 1822 } 1823 1824 /* 1825 * Scan the device for video chains and register video devices. 1826 * 1827 * Chains are scanned starting at their output terminals and walked backwards. 1828 */ 1829 static int uvc_scan_device(struct uvc_device *dev) 1830 { 1831 struct uvc_video_chain *chain; 1832 struct uvc_entity *term; 1833 1834 list_for_each_entry(term, &dev->entities, list) { 1835 if (!UVC_ENTITY_IS_OTERM(term)) 1836 continue; 1837 1838 /* If the terminal is already included in a chain, skip it. 1839 * This can happen for chains that have multiple output 1840 * terminals, where all output terminals beside the first one 1841 * will be inserted in the chain in forward scans. 1842 */ 1843 if (term->chain.next || term->chain.prev) 1844 continue; 1845 1846 chain = uvc_alloc_chain(dev); 1847 if (chain == NULL) 1848 return -ENOMEM; 1849 1850 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1851 1852 if (uvc_scan_chain(chain, term) < 0) { 1853 kfree(chain); 1854 continue; 1855 } 1856 1857 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1858 uvc_print_chain(chain)); 1859 1860 list_add_tail(&chain->list, &dev->chains); 1861 } 1862 1863 if (list_empty(&dev->chains)) 1864 uvc_scan_fallback(dev); 1865 1866 if (list_empty(&dev->chains)) { 1867 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1868 return -1; 1869 } 1870 1871 return 0; 1872 } 1873 1874 /* ------------------------------------------------------------------------ 1875 * Video device registration and unregistration 1876 */ 1877 1878 /* 1879 * Delete the UVC device. 1880 * 1881 * Called by the kernel when the last reference to the uvc_device structure 1882 * is released. 1883 * 1884 * As this function is called after or during disconnect(), all URBs have 1885 * already been cancelled by the USB core. There is no need to kill the 1886 * interrupt URB manually. 1887 */ 1888 static void uvc_delete(struct kref *kref) 1889 { 1890 struct uvc_device *dev = container_of(kref, struct uvc_device, ref); 1891 struct list_head *p, *n; 1892 1893 uvc_status_cleanup(dev); 1894 uvc_ctrl_cleanup_device(dev); 1895 1896 usb_put_intf(dev->intf); 1897 usb_put_dev(dev->udev); 1898 1899 #ifdef CONFIG_MEDIA_CONTROLLER 1900 media_device_cleanup(&dev->mdev); 1901 #endif 1902 1903 list_for_each_safe(p, n, &dev->chains) { 1904 struct uvc_video_chain *chain; 1905 chain = list_entry(p, struct uvc_video_chain, list); 1906 kfree(chain); 1907 } 1908 1909 list_for_each_safe(p, n, &dev->entities) { 1910 struct uvc_entity *entity; 1911 entity = list_entry(p, struct uvc_entity, list); 1912 #ifdef CONFIG_MEDIA_CONTROLLER 1913 uvc_mc_cleanup_entity(entity); 1914 #endif 1915 kfree(entity); 1916 } 1917 1918 list_for_each_safe(p, n, &dev->streams) { 1919 struct uvc_streaming *streaming; 1920 streaming = list_entry(p, struct uvc_streaming, list); 1921 usb_driver_release_interface(&uvc_driver.driver, 1922 streaming->intf); 1923 uvc_stream_delete(streaming); 1924 } 1925 1926 kfree(dev); 1927 } 1928 1929 static void uvc_release(struct video_device *vdev) 1930 { 1931 struct uvc_streaming *stream = video_get_drvdata(vdev); 1932 struct uvc_device *dev = stream->dev; 1933 1934 kref_put(&dev->ref, uvc_delete); 1935 } 1936 1937 /* 1938 * Unregister the video devices. 1939 */ 1940 static void uvc_unregister_video(struct uvc_device *dev) 1941 { 1942 struct uvc_streaming *stream; 1943 1944 list_for_each_entry(stream, &dev->streams, list) { 1945 if (!video_is_registered(&stream->vdev)) 1946 continue; 1947 1948 video_unregister_device(&stream->vdev); 1949 video_unregister_device(&stream->meta.vdev); 1950 1951 uvc_debugfs_cleanup_stream(stream); 1952 } 1953 1954 uvc_status_unregister(dev); 1955 1956 if (dev->vdev.dev) 1957 v4l2_device_unregister(&dev->vdev); 1958 #ifdef CONFIG_MEDIA_CONTROLLER 1959 if (media_devnode_is_registered(dev->mdev.devnode)) 1960 media_device_unregister(&dev->mdev); 1961 #endif 1962 } 1963 1964 int uvc_register_video_device(struct uvc_device *dev, 1965 struct uvc_streaming *stream, 1966 struct video_device *vdev, 1967 struct uvc_video_queue *queue, 1968 enum v4l2_buf_type type, 1969 const struct v4l2_file_operations *fops, 1970 const struct v4l2_ioctl_ops *ioctl_ops) 1971 { 1972 int ret; 1973 1974 /* Initialize the video buffers queue. */ 1975 ret = uvc_queue_init(queue, type, !uvc_no_drop_param); 1976 if (ret) 1977 return ret; 1978 1979 /* Register the device with V4L. */ 1980 1981 /* 1982 * We already hold a reference to dev->udev. The video device will be 1983 * unregistered before the reference is released, so we don't need to 1984 * get another one. 1985 */ 1986 vdev->v4l2_dev = &dev->vdev; 1987 vdev->fops = fops; 1988 vdev->ioctl_ops = ioctl_ops; 1989 vdev->release = uvc_release; 1990 vdev->prio = &stream->chain->prio; 1991 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1992 vdev->vfl_dir = VFL_DIR_TX; 1993 else 1994 vdev->vfl_dir = VFL_DIR_RX; 1995 1996 switch (type) { 1997 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1998 default: 1999 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 2000 break; 2001 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 2002 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 2003 break; 2004 case V4L2_BUF_TYPE_META_CAPTURE: 2005 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; 2006 break; 2007 } 2008 2009 strscpy(vdev->name, dev->name, sizeof(vdev->name)); 2010 2011 /* 2012 * Set the driver data before calling video_register_device, otherwise 2013 * the file open() handler might race us. 2014 */ 2015 video_set_drvdata(vdev, stream); 2016 2017 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); 2018 if (ret < 0) { 2019 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n", 2020 v4l2_type_names[type], ret); 2021 return ret; 2022 } 2023 2024 kref_get(&dev->ref); 2025 return 0; 2026 } 2027 2028 static int uvc_register_video(struct uvc_device *dev, 2029 struct uvc_streaming *stream) 2030 { 2031 int ret; 2032 2033 /* Initialize the streaming interface with default parameters. */ 2034 ret = uvc_video_init(stream); 2035 if (ret < 0) { 2036 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n", 2037 ret); 2038 return ret; 2039 } 2040 2041 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2042 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE 2043 | V4L2_CAP_META_CAPTURE; 2044 else 2045 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 2046 2047 uvc_debugfs_init_stream(stream); 2048 2049 /* Register the device with V4L. */ 2050 return uvc_register_video_device(dev, stream, &stream->vdev, 2051 &stream->queue, stream->type, 2052 &uvc_fops, &uvc_ioctl_ops); 2053 } 2054 2055 /* 2056 * Register all video devices in all chains. 2057 */ 2058 static int uvc_register_terms(struct uvc_device *dev, 2059 struct uvc_video_chain *chain) 2060 { 2061 struct uvc_streaming *stream; 2062 struct uvc_entity *term; 2063 int ret; 2064 2065 list_for_each_entry(term, &chain->entities, chain) { 2066 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 2067 continue; 2068 2069 stream = uvc_stream_by_id(dev, term->id); 2070 if (stream == NULL) { 2071 uvc_printk(KERN_INFO, "No streaming interface found " 2072 "for terminal %u.", term->id); 2073 continue; 2074 } 2075 2076 stream->chain = chain; 2077 ret = uvc_register_video(dev, stream); 2078 if (ret < 0) 2079 return ret; 2080 2081 /* Register a metadata node, but ignore a possible failure, 2082 * complete registration of video nodes anyway. 2083 */ 2084 uvc_meta_register(stream); 2085 2086 term->vdev = &stream->vdev; 2087 } 2088 2089 return 0; 2090 } 2091 2092 static int uvc_register_chains(struct uvc_device *dev) 2093 { 2094 struct uvc_video_chain *chain; 2095 int ret; 2096 2097 list_for_each_entry(chain, &dev->chains, list) { 2098 ret = uvc_register_terms(dev, chain); 2099 if (ret < 0) 2100 return ret; 2101 2102 #ifdef CONFIG_MEDIA_CONTROLLER 2103 ret = uvc_mc_register_entities(chain); 2104 if (ret < 0) 2105 uvc_printk(KERN_INFO, 2106 "Failed to register entities (%d).\n", ret); 2107 #endif 2108 } 2109 2110 return 0; 2111 } 2112 2113 /* ------------------------------------------------------------------------ 2114 * USB probe, disconnect, suspend and resume 2115 */ 2116 2117 static const struct uvc_device_info uvc_quirk_none = { 0 }; 2118 2119 static int uvc_probe(struct usb_interface *intf, 2120 const struct usb_device_id *id) 2121 { 2122 struct usb_device *udev = interface_to_usbdev(intf); 2123 struct uvc_device *dev; 2124 const struct uvc_device_info *info = 2125 (const struct uvc_device_info *)id->driver_info; 2126 int function; 2127 int ret; 2128 2129 if (id->idVendor && id->idProduct) 2130 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 2131 "(%04x:%04x)\n", udev->devpath, id->idVendor, 2132 id->idProduct); 2133 else 2134 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 2135 udev->devpath); 2136 2137 /* Allocate memory for the device and initialize it. */ 2138 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2139 if (dev == NULL) 2140 return -ENOMEM; 2141 2142 INIT_LIST_HEAD(&dev->entities); 2143 INIT_LIST_HEAD(&dev->chains); 2144 INIT_LIST_HEAD(&dev->streams); 2145 kref_init(&dev->ref); 2146 atomic_set(&dev->nmappings, 0); 2147 mutex_init(&dev->lock); 2148 2149 dev->udev = usb_get_dev(udev); 2150 dev->intf = usb_get_intf(intf); 2151 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 2152 dev->info = info ? info : &uvc_quirk_none; 2153 dev->quirks = uvc_quirks_param == -1 2154 ? dev->info->quirks : uvc_quirks_param; 2155 2156 if (udev->product != NULL) 2157 strscpy(dev->name, udev->product, sizeof(dev->name)); 2158 else 2159 snprintf(dev->name, sizeof(dev->name), 2160 "UVC Camera (%04x:%04x)", 2161 le16_to_cpu(udev->descriptor.idVendor), 2162 le16_to_cpu(udev->descriptor.idProduct)); 2163 2164 /* 2165 * Add iFunction or iInterface to names when available as additional 2166 * distinguishers between interfaces. iFunction is prioritized over 2167 * iInterface which matches Windows behavior at the point of writing. 2168 */ 2169 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0) 2170 function = intf->intf_assoc->iFunction; 2171 else 2172 function = intf->cur_altsetting->desc.iInterface; 2173 if (function != 0) { 2174 size_t len; 2175 2176 strlcat(dev->name, ": ", sizeof(dev->name)); 2177 len = strlen(dev->name); 2178 usb_string(udev, function, dev->name + len, 2179 sizeof(dev->name) - len); 2180 } 2181 2182 /* Initialize the media device. */ 2183 #ifdef CONFIG_MEDIA_CONTROLLER 2184 dev->mdev.dev = &intf->dev; 2185 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 2186 if (udev->serial) 2187 strscpy(dev->mdev.serial, udev->serial, 2188 sizeof(dev->mdev.serial)); 2189 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info)); 2190 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 2191 media_device_init(&dev->mdev); 2192 2193 dev->vdev.mdev = &dev->mdev; 2194 #endif 2195 2196 /* Parse the Video Class control descriptor. */ 2197 if (uvc_parse_control(dev) < 0) { 2198 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 2199 "descriptors.\n"); 2200 goto error; 2201 } 2202 2203 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 2204 dev->uvc_version >> 8, dev->uvc_version & 0xff, 2205 udev->product ? udev->product : "<unnamed>", 2206 le16_to_cpu(udev->descriptor.idVendor), 2207 le16_to_cpu(udev->descriptor.idProduct)); 2208 2209 if (dev->quirks != dev->info->quirks) { 2210 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 2211 "parameter for testing purpose.\n", dev->quirks); 2212 uvc_printk(KERN_INFO, "Please report required quirks to the " 2213 "linux-uvc-devel mailing list.\n"); 2214 } 2215 2216 /* Register the V4L2 device. */ 2217 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 2218 goto error; 2219 2220 /* Initialize controls. */ 2221 if (uvc_ctrl_init_device(dev) < 0) 2222 goto error; 2223 2224 /* Scan the device for video chains. */ 2225 if (uvc_scan_device(dev) < 0) 2226 goto error; 2227 2228 /* Register video device nodes. */ 2229 if (uvc_register_chains(dev) < 0) 2230 goto error; 2231 2232 #ifdef CONFIG_MEDIA_CONTROLLER 2233 /* Register the media device node */ 2234 if (media_device_register(&dev->mdev) < 0) 2235 goto error; 2236 #endif 2237 /* Save our data pointer in the interface data. */ 2238 usb_set_intfdata(intf, dev); 2239 2240 /* Initialize the interrupt URB. */ 2241 if ((ret = uvc_status_init(dev)) < 0) { 2242 uvc_printk(KERN_INFO, "Unable to initialize the status " 2243 "endpoint (%d), status interrupt will not be " 2244 "supported.\n", ret); 2245 } 2246 2247 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 2248 usb_enable_autosuspend(udev); 2249 return 0; 2250 2251 error: 2252 uvc_unregister_video(dev); 2253 kref_put(&dev->ref, uvc_delete); 2254 return -ENODEV; 2255 } 2256 2257 static void uvc_disconnect(struct usb_interface *intf) 2258 { 2259 struct uvc_device *dev = usb_get_intfdata(intf); 2260 2261 /* Set the USB interface data to NULL. This can be done outside the 2262 * lock, as there's no other reader. 2263 */ 2264 usb_set_intfdata(intf, NULL); 2265 2266 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2267 UVC_SC_VIDEOSTREAMING) 2268 return; 2269 2270 uvc_unregister_video(dev); 2271 kref_put(&dev->ref, uvc_delete); 2272 } 2273 2274 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 2275 { 2276 struct uvc_device *dev = usb_get_intfdata(intf); 2277 struct uvc_streaming *stream; 2278 2279 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 2280 intf->cur_altsetting->desc.bInterfaceNumber); 2281 2282 /* Controls are cached on the fly so they don't need to be saved. */ 2283 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2284 UVC_SC_VIDEOCONTROL) { 2285 mutex_lock(&dev->lock); 2286 if (dev->users) 2287 uvc_status_stop(dev); 2288 mutex_unlock(&dev->lock); 2289 return 0; 2290 } 2291 2292 list_for_each_entry(stream, &dev->streams, list) { 2293 if (stream->intf == intf) 2294 return uvc_video_suspend(stream); 2295 } 2296 2297 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2298 "mismatch.\n"); 2299 return -EINVAL; 2300 } 2301 2302 static int __uvc_resume(struct usb_interface *intf, int reset) 2303 { 2304 struct uvc_device *dev = usb_get_intfdata(intf); 2305 struct uvc_streaming *stream; 2306 int ret = 0; 2307 2308 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2309 intf->cur_altsetting->desc.bInterfaceNumber); 2310 2311 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2312 UVC_SC_VIDEOCONTROL) { 2313 if (reset) { 2314 ret = uvc_ctrl_restore_values(dev); 2315 if (ret < 0) 2316 return ret; 2317 } 2318 2319 mutex_lock(&dev->lock); 2320 if (dev->users) 2321 ret = uvc_status_start(dev, GFP_NOIO); 2322 mutex_unlock(&dev->lock); 2323 2324 return ret; 2325 } 2326 2327 list_for_each_entry(stream, &dev->streams, list) { 2328 if (stream->intf == intf) { 2329 ret = uvc_video_resume(stream, reset); 2330 if (ret < 0) 2331 uvc_queue_streamoff(&stream->queue, 2332 stream->queue.queue.type); 2333 return ret; 2334 } 2335 } 2336 2337 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2338 "mismatch.\n"); 2339 return -EINVAL; 2340 } 2341 2342 static int uvc_resume(struct usb_interface *intf) 2343 { 2344 return __uvc_resume(intf, 0); 2345 } 2346 2347 static int uvc_reset_resume(struct usb_interface *intf) 2348 { 2349 return __uvc_resume(intf, 1); 2350 } 2351 2352 /* ------------------------------------------------------------------------ 2353 * Module parameters 2354 */ 2355 2356 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp) 2357 { 2358 if (uvc_clock_param == CLOCK_MONOTONIC) 2359 return sprintf(buffer, "CLOCK_MONOTONIC"); 2360 else 2361 return sprintf(buffer, "CLOCK_REALTIME"); 2362 } 2363 2364 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp) 2365 { 2366 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2367 val += strlen("clock_"); 2368 2369 if (strcasecmp(val, "monotonic") == 0) 2370 uvc_clock_param = CLOCK_MONOTONIC; 2371 else if (strcasecmp(val, "realtime") == 0) 2372 uvc_clock_param = CLOCK_REALTIME; 2373 else 2374 return -EINVAL; 2375 2376 return 0; 2377 } 2378 2379 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2380 &uvc_clock_param, S_IRUGO|S_IWUSR); 2381 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2382 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR); 2383 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); 2384 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2385 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2386 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2387 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2388 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2389 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2390 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2391 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2392 2393 /* ------------------------------------------------------------------------ 2394 * Driver initialization and cleanup 2395 */ 2396 2397 static const struct uvc_device_info uvc_quirk_probe_minmax = { 2398 .quirks = UVC_QUIRK_PROBE_MINMAX, 2399 }; 2400 2401 static const struct uvc_device_info uvc_quirk_fix_bandwidth = { 2402 .quirks = UVC_QUIRK_FIX_BANDWIDTH, 2403 }; 2404 2405 static const struct uvc_device_info uvc_quirk_probe_def = { 2406 .quirks = UVC_QUIRK_PROBE_DEF, 2407 }; 2408 2409 static const struct uvc_device_info uvc_quirk_stream_no_fid = { 2410 .quirks = UVC_QUIRK_STREAM_NO_FID, 2411 }; 2412 2413 static const struct uvc_device_info uvc_quirk_force_y8 = { 2414 .quirks = UVC_QUIRK_FORCE_Y8, 2415 }; 2416 2417 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q} 2418 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \ 2419 {.meta_format = m} 2420 2421 /* 2422 * The Logitech cameras listed below have their interface class set to 2423 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2424 * though they are compliant. 2425 */ 2426 static const struct usb_device_id uvc_ids[] = { 2427 /* LogiLink Wireless Webcam */ 2428 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2429 | USB_DEVICE_ID_MATCH_INT_INFO, 2430 .idVendor = 0x0416, 2431 .idProduct = 0xa91a, 2432 .bInterfaceClass = USB_CLASS_VIDEO, 2433 .bInterfaceSubClass = 1, 2434 .bInterfaceProtocol = 0, 2435 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2436 /* Genius eFace 2025 */ 2437 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2438 | USB_DEVICE_ID_MATCH_INT_INFO, 2439 .idVendor = 0x0458, 2440 .idProduct = 0x706e, 2441 .bInterfaceClass = USB_CLASS_VIDEO, 2442 .bInterfaceSubClass = 1, 2443 .bInterfaceProtocol = 0, 2444 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2445 /* Microsoft Lifecam NX-6000 */ 2446 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2447 | USB_DEVICE_ID_MATCH_INT_INFO, 2448 .idVendor = 0x045e, 2449 .idProduct = 0x00f8, 2450 .bInterfaceClass = USB_CLASS_VIDEO, 2451 .bInterfaceSubClass = 1, 2452 .bInterfaceProtocol = 0, 2453 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2454 /* Microsoft Lifecam NX-3000 */ 2455 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2456 | USB_DEVICE_ID_MATCH_INT_INFO, 2457 .idVendor = 0x045e, 2458 .idProduct = 0x0721, 2459 .bInterfaceClass = USB_CLASS_VIDEO, 2460 .bInterfaceSubClass = 1, 2461 .bInterfaceProtocol = 0, 2462 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2463 /* Microsoft Lifecam VX-7000 */ 2464 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2465 | USB_DEVICE_ID_MATCH_INT_INFO, 2466 .idVendor = 0x045e, 2467 .idProduct = 0x0723, 2468 .bInterfaceClass = USB_CLASS_VIDEO, 2469 .bInterfaceSubClass = 1, 2470 .bInterfaceProtocol = 0, 2471 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2472 /* Logitech Quickcam Fusion */ 2473 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2474 | USB_DEVICE_ID_MATCH_INT_INFO, 2475 .idVendor = 0x046d, 2476 .idProduct = 0x08c1, 2477 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2478 .bInterfaceSubClass = 1, 2479 .bInterfaceProtocol = 0 }, 2480 /* Logitech Quickcam Orbit MP */ 2481 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2482 | USB_DEVICE_ID_MATCH_INT_INFO, 2483 .idVendor = 0x046d, 2484 .idProduct = 0x08c2, 2485 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2486 .bInterfaceSubClass = 1, 2487 .bInterfaceProtocol = 0 }, 2488 /* Logitech Quickcam Pro for Notebook */ 2489 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2490 | USB_DEVICE_ID_MATCH_INT_INFO, 2491 .idVendor = 0x046d, 2492 .idProduct = 0x08c3, 2493 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2494 .bInterfaceSubClass = 1, 2495 .bInterfaceProtocol = 0 }, 2496 /* Logitech Quickcam Pro 5000 */ 2497 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2498 | USB_DEVICE_ID_MATCH_INT_INFO, 2499 .idVendor = 0x046d, 2500 .idProduct = 0x08c5, 2501 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2502 .bInterfaceSubClass = 1, 2503 .bInterfaceProtocol = 0 }, 2504 /* Logitech Quickcam OEM Dell Notebook */ 2505 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2506 | USB_DEVICE_ID_MATCH_INT_INFO, 2507 .idVendor = 0x046d, 2508 .idProduct = 0x08c6, 2509 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2510 .bInterfaceSubClass = 1, 2511 .bInterfaceProtocol = 0 }, 2512 /* Logitech Quickcam OEM Cisco VT Camera II */ 2513 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2514 | USB_DEVICE_ID_MATCH_INT_INFO, 2515 .idVendor = 0x046d, 2516 .idProduct = 0x08c7, 2517 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2518 .bInterfaceSubClass = 1, 2519 .bInterfaceProtocol = 0 }, 2520 /* Logitech HD Pro Webcam C920 */ 2521 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2522 | USB_DEVICE_ID_MATCH_INT_INFO, 2523 .idVendor = 0x046d, 2524 .idProduct = 0x082d, 2525 .bInterfaceClass = USB_CLASS_VIDEO, 2526 .bInterfaceSubClass = 1, 2527 .bInterfaceProtocol = 0, 2528 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) }, 2529 /* Chicony CNF7129 (Asus EEE 100HE) */ 2530 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2531 | USB_DEVICE_ID_MATCH_INT_INFO, 2532 .idVendor = 0x04f2, 2533 .idProduct = 0xb071, 2534 .bInterfaceClass = USB_CLASS_VIDEO, 2535 .bInterfaceSubClass = 1, 2536 .bInterfaceProtocol = 0, 2537 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) }, 2538 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2539 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2540 | USB_DEVICE_ID_MATCH_INT_INFO, 2541 .idVendor = 0x058f, 2542 .idProduct = 0x3820, 2543 .bInterfaceClass = USB_CLASS_VIDEO, 2544 .bInterfaceSubClass = 1, 2545 .bInterfaceProtocol = 0, 2546 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2547 /* Dell XPS m1530 */ 2548 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2549 | USB_DEVICE_ID_MATCH_INT_INFO, 2550 .idVendor = 0x05a9, 2551 .idProduct = 0x2640, 2552 .bInterfaceClass = USB_CLASS_VIDEO, 2553 .bInterfaceSubClass = 1, 2554 .bInterfaceProtocol = 0, 2555 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2556 /* Dell SP2008WFP Monitor */ 2557 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2558 | USB_DEVICE_ID_MATCH_INT_INFO, 2559 .idVendor = 0x05a9, 2560 .idProduct = 0x2641, 2561 .bInterfaceClass = USB_CLASS_VIDEO, 2562 .bInterfaceSubClass = 1, 2563 .bInterfaceProtocol = 0, 2564 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2565 /* Dell Alienware X51 */ 2566 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2567 | USB_DEVICE_ID_MATCH_INT_INFO, 2568 .idVendor = 0x05a9, 2569 .idProduct = 0x2643, 2570 .bInterfaceClass = USB_CLASS_VIDEO, 2571 .bInterfaceSubClass = 1, 2572 .bInterfaceProtocol = 0, 2573 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2574 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2575 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2576 | USB_DEVICE_ID_MATCH_INT_INFO, 2577 .idVendor = 0x05a9, 2578 .idProduct = 0x264a, 2579 .bInterfaceClass = USB_CLASS_VIDEO, 2580 .bInterfaceSubClass = 1, 2581 .bInterfaceProtocol = 0, 2582 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2583 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2584 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2585 | USB_DEVICE_ID_MATCH_INT_INFO, 2586 .idVendor = 0x05a9, 2587 .idProduct = 0x7670, 2588 .bInterfaceClass = USB_CLASS_VIDEO, 2589 .bInterfaceSubClass = 1, 2590 .bInterfaceProtocol = 0, 2591 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2592 /* Apple Built-In iSight */ 2593 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2594 | USB_DEVICE_ID_MATCH_INT_INFO, 2595 .idVendor = 0x05ac, 2596 .idProduct = 0x8501, 2597 .bInterfaceClass = USB_CLASS_VIDEO, 2598 .bInterfaceSubClass = 1, 2599 .bInterfaceProtocol = 0, 2600 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2601 | UVC_QUIRK_BUILTIN_ISIGHT) }, 2602 /* Apple Built-In iSight via iBridge */ 2603 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2604 | USB_DEVICE_ID_MATCH_INT_INFO, 2605 .idVendor = 0x05ac, 2606 .idProduct = 0x8600, 2607 .bInterfaceClass = USB_CLASS_VIDEO, 2608 .bInterfaceSubClass = 1, 2609 .bInterfaceProtocol = 0, 2610 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2611 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2612 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2613 | USB_DEVICE_ID_MATCH_INT_INFO, 2614 .idVendor = 0x05c8, 2615 .idProduct = 0x0403, 2616 .bInterfaceClass = USB_CLASS_VIDEO, 2617 .bInterfaceSubClass = 1, 2618 .bInterfaceProtocol = 0, 2619 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2620 /* Genesys Logic USB 2.0 PC Camera */ 2621 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2622 | USB_DEVICE_ID_MATCH_INT_INFO, 2623 .idVendor = 0x05e3, 2624 .idProduct = 0x0505, 2625 .bInterfaceClass = USB_CLASS_VIDEO, 2626 .bInterfaceSubClass = 1, 2627 .bInterfaceProtocol = 0, 2628 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2629 /* Hercules Classic Silver */ 2630 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2631 | USB_DEVICE_ID_MATCH_INT_INFO, 2632 .idVendor = 0x06f8, 2633 .idProduct = 0x300c, 2634 .bInterfaceClass = USB_CLASS_VIDEO, 2635 .bInterfaceSubClass = 1, 2636 .bInterfaceProtocol = 0, 2637 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2638 /* ViMicro Vega */ 2639 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2640 | USB_DEVICE_ID_MATCH_INT_INFO, 2641 .idVendor = 0x0ac8, 2642 .idProduct = 0x332d, 2643 .bInterfaceClass = USB_CLASS_VIDEO, 2644 .bInterfaceSubClass = 1, 2645 .bInterfaceProtocol = 0, 2646 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2647 /* ViMicro - Minoru3D */ 2648 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2649 | USB_DEVICE_ID_MATCH_INT_INFO, 2650 .idVendor = 0x0ac8, 2651 .idProduct = 0x3410, 2652 .bInterfaceClass = USB_CLASS_VIDEO, 2653 .bInterfaceSubClass = 1, 2654 .bInterfaceProtocol = 0, 2655 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2656 /* ViMicro Venus - Minoru3D */ 2657 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2658 | USB_DEVICE_ID_MATCH_INT_INFO, 2659 .idVendor = 0x0ac8, 2660 .idProduct = 0x3420, 2661 .bInterfaceClass = USB_CLASS_VIDEO, 2662 .bInterfaceSubClass = 1, 2663 .bInterfaceProtocol = 0, 2664 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2665 /* Ophir Optronics - SPCAM 620U */ 2666 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2667 | USB_DEVICE_ID_MATCH_INT_INFO, 2668 .idVendor = 0x0bd3, 2669 .idProduct = 0x0555, 2670 .bInterfaceClass = USB_CLASS_VIDEO, 2671 .bInterfaceSubClass = 1, 2672 .bInterfaceProtocol = 0, 2673 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2674 /* MT6227 */ 2675 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2676 | USB_DEVICE_ID_MATCH_INT_INFO, 2677 .idVendor = 0x0e8d, 2678 .idProduct = 0x0004, 2679 .bInterfaceClass = USB_CLASS_VIDEO, 2680 .bInterfaceSubClass = 1, 2681 .bInterfaceProtocol = 0, 2682 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2683 | UVC_QUIRK_PROBE_DEF) }, 2684 /* IMC Networks (Medion Akoya) */ 2685 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2686 | USB_DEVICE_ID_MATCH_INT_INFO, 2687 .idVendor = 0x13d3, 2688 .idProduct = 0x5103, 2689 .bInterfaceClass = USB_CLASS_VIDEO, 2690 .bInterfaceSubClass = 1, 2691 .bInterfaceProtocol = 0, 2692 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2693 /* JMicron USB2.0 XGA WebCam */ 2694 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2695 | USB_DEVICE_ID_MATCH_INT_INFO, 2696 .idVendor = 0x152d, 2697 .idProduct = 0x0310, 2698 .bInterfaceClass = USB_CLASS_VIDEO, 2699 .bInterfaceSubClass = 1, 2700 .bInterfaceProtocol = 0, 2701 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2702 /* Syntek (HP Spartan) */ 2703 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2704 | USB_DEVICE_ID_MATCH_INT_INFO, 2705 .idVendor = 0x174f, 2706 .idProduct = 0x5212, 2707 .bInterfaceClass = USB_CLASS_VIDEO, 2708 .bInterfaceSubClass = 1, 2709 .bInterfaceProtocol = 0, 2710 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2711 /* Syntek (Samsung Q310) */ 2712 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2713 | USB_DEVICE_ID_MATCH_INT_INFO, 2714 .idVendor = 0x174f, 2715 .idProduct = 0x5931, 2716 .bInterfaceClass = USB_CLASS_VIDEO, 2717 .bInterfaceSubClass = 1, 2718 .bInterfaceProtocol = 0, 2719 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2720 /* Syntek (Packard Bell EasyNote MX52 */ 2721 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2722 | USB_DEVICE_ID_MATCH_INT_INFO, 2723 .idVendor = 0x174f, 2724 .idProduct = 0x8a12, 2725 .bInterfaceClass = USB_CLASS_VIDEO, 2726 .bInterfaceSubClass = 1, 2727 .bInterfaceProtocol = 0, 2728 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2729 /* Syntek (Asus F9SG) */ 2730 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2731 | USB_DEVICE_ID_MATCH_INT_INFO, 2732 .idVendor = 0x174f, 2733 .idProduct = 0x8a31, 2734 .bInterfaceClass = USB_CLASS_VIDEO, 2735 .bInterfaceSubClass = 1, 2736 .bInterfaceProtocol = 0, 2737 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2738 /* Syntek (Asus U3S) */ 2739 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2740 | USB_DEVICE_ID_MATCH_INT_INFO, 2741 .idVendor = 0x174f, 2742 .idProduct = 0x8a33, 2743 .bInterfaceClass = USB_CLASS_VIDEO, 2744 .bInterfaceSubClass = 1, 2745 .bInterfaceProtocol = 0, 2746 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2747 /* Syntek (JAOtech Smart Terminal) */ 2748 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2749 | USB_DEVICE_ID_MATCH_INT_INFO, 2750 .idVendor = 0x174f, 2751 .idProduct = 0x8a34, 2752 .bInterfaceClass = USB_CLASS_VIDEO, 2753 .bInterfaceSubClass = 1, 2754 .bInterfaceProtocol = 0, 2755 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2756 /* Miricle 307K */ 2757 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2758 | USB_DEVICE_ID_MATCH_INT_INFO, 2759 .idVendor = 0x17dc, 2760 .idProduct = 0x0202, 2761 .bInterfaceClass = USB_CLASS_VIDEO, 2762 .bInterfaceSubClass = 1, 2763 .bInterfaceProtocol = 0, 2764 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2765 /* Lenovo Thinkpad SL400/SL500 */ 2766 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2767 | USB_DEVICE_ID_MATCH_INT_INFO, 2768 .idVendor = 0x17ef, 2769 .idProduct = 0x480b, 2770 .bInterfaceClass = USB_CLASS_VIDEO, 2771 .bInterfaceSubClass = 1, 2772 .bInterfaceProtocol = 0, 2773 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2774 /* Aveo Technology USB 2.0 Camera */ 2775 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2776 | USB_DEVICE_ID_MATCH_INT_INFO, 2777 .idVendor = 0x1871, 2778 .idProduct = 0x0306, 2779 .bInterfaceClass = USB_CLASS_VIDEO, 2780 .bInterfaceSubClass = 1, 2781 .bInterfaceProtocol = 0, 2782 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2783 | UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2784 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */ 2785 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2786 | USB_DEVICE_ID_MATCH_INT_INFO, 2787 .idVendor = 0x1871, 2788 .idProduct = 0x0516, 2789 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2790 .bInterfaceSubClass = 1, 2791 .bInterfaceProtocol = 0 }, 2792 /* Ecamm Pico iMage */ 2793 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2794 | USB_DEVICE_ID_MATCH_INT_INFO, 2795 .idVendor = 0x18cd, 2796 .idProduct = 0xcafe, 2797 .bInterfaceClass = USB_CLASS_VIDEO, 2798 .bInterfaceSubClass = 1, 2799 .bInterfaceProtocol = 0, 2800 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2801 /* Manta MM-353 Plako */ 2802 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2803 | USB_DEVICE_ID_MATCH_INT_INFO, 2804 .idVendor = 0x18ec, 2805 .idProduct = 0x3188, 2806 .bInterfaceClass = USB_CLASS_VIDEO, 2807 .bInterfaceSubClass = 1, 2808 .bInterfaceProtocol = 0, 2809 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2810 /* FSC WebCam V30S */ 2811 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2812 | USB_DEVICE_ID_MATCH_INT_INFO, 2813 .idVendor = 0x18ec, 2814 .idProduct = 0x3288, 2815 .bInterfaceClass = USB_CLASS_VIDEO, 2816 .bInterfaceSubClass = 1, 2817 .bInterfaceProtocol = 0, 2818 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2819 /* Arkmicro unbranded */ 2820 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2821 | USB_DEVICE_ID_MATCH_INT_INFO, 2822 .idVendor = 0x18ec, 2823 .idProduct = 0x3290, 2824 .bInterfaceClass = USB_CLASS_VIDEO, 2825 .bInterfaceSubClass = 1, 2826 .bInterfaceProtocol = 0, 2827 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2828 /* The Imaging Source USB CCD cameras */ 2829 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2830 | USB_DEVICE_ID_MATCH_INT_INFO, 2831 .idVendor = 0x199e, 2832 .idProduct = 0x8102, 2833 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2834 .bInterfaceSubClass = 1, 2835 .bInterfaceProtocol = 0 }, 2836 /* Bodelin ProScopeHR */ 2837 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2838 | USB_DEVICE_ID_MATCH_DEV_HI 2839 | USB_DEVICE_ID_MATCH_INT_INFO, 2840 .idVendor = 0x19ab, 2841 .idProduct = 0x1000, 2842 .bcdDevice_hi = 0x0126, 2843 .bInterfaceClass = USB_CLASS_VIDEO, 2844 .bInterfaceSubClass = 1, 2845 .bInterfaceProtocol = 0, 2846 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) }, 2847 /* MSI StarCam 370i */ 2848 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2849 | USB_DEVICE_ID_MATCH_INT_INFO, 2850 .idVendor = 0x1b3b, 2851 .idProduct = 0x2951, 2852 .bInterfaceClass = USB_CLASS_VIDEO, 2853 .bInterfaceSubClass = 1, 2854 .bInterfaceProtocol = 0, 2855 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2856 /* Generalplus Technology Inc. 808 Camera */ 2857 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2858 | USB_DEVICE_ID_MATCH_INT_INFO, 2859 .idVendor = 0x1b3f, 2860 .idProduct = 0x2002, 2861 .bInterfaceClass = USB_CLASS_VIDEO, 2862 .bInterfaceSubClass = 1, 2863 .bInterfaceProtocol = 0, 2864 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2865 /* SiGma Micro USB Web Camera */ 2866 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2867 | USB_DEVICE_ID_MATCH_INT_INFO, 2868 .idVendor = 0x1c4f, 2869 .idProduct = 0x3000, 2870 .bInterfaceClass = USB_CLASS_VIDEO, 2871 .bInterfaceSubClass = 1, 2872 .bInterfaceProtocol = 0, 2873 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2874 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) }, 2875 /* Oculus VR Positional Tracker DK2 */ 2876 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2877 | USB_DEVICE_ID_MATCH_INT_INFO, 2878 .idVendor = 0x2833, 2879 .idProduct = 0x0201, 2880 .bInterfaceClass = USB_CLASS_VIDEO, 2881 .bInterfaceSubClass = 1, 2882 .bInterfaceProtocol = 0, 2883 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2884 /* Oculus VR Rift Sensor */ 2885 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2886 | USB_DEVICE_ID_MATCH_INT_INFO, 2887 .idVendor = 0x2833, 2888 .idProduct = 0x0211, 2889 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2890 .bInterfaceSubClass = 1, 2891 .bInterfaceProtocol = 0, 2892 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2893 /* GEO Semiconductor GC6500 */ 2894 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2895 | USB_DEVICE_ID_MATCH_INT_INFO, 2896 .idVendor = 0x29fe, 2897 .idProduct = 0x4d53, 2898 .bInterfaceClass = USB_CLASS_VIDEO, 2899 .bInterfaceSubClass = 1, 2900 .bInterfaceProtocol = 0, 2901 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) }, 2902 /* Intel RealSense D4M */ 2903 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2904 | USB_DEVICE_ID_MATCH_INT_INFO, 2905 .idVendor = 0x8086, 2906 .idProduct = 0x0b03, 2907 .bInterfaceClass = USB_CLASS_VIDEO, 2908 .bInterfaceSubClass = 1, 2909 .bInterfaceProtocol = 0, 2910 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) }, 2911 /* Generic USB Video Class */ 2912 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) }, 2913 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) }, 2914 {} 2915 }; 2916 2917 MODULE_DEVICE_TABLE(usb, uvc_ids); 2918 2919 struct uvc_driver uvc_driver = { 2920 .driver = { 2921 .name = "uvcvideo", 2922 .probe = uvc_probe, 2923 .disconnect = uvc_disconnect, 2924 .suspend = uvc_suspend, 2925 .resume = uvc_resume, 2926 .reset_resume = uvc_reset_resume, 2927 .id_table = uvc_ids, 2928 .supports_autosuspend = 1, 2929 }, 2930 }; 2931 2932 static int __init uvc_init(void) 2933 { 2934 int ret; 2935 2936 uvc_debugfs_init(); 2937 2938 ret = usb_register(&uvc_driver.driver); 2939 if (ret < 0) { 2940 uvc_debugfs_cleanup(); 2941 return ret; 2942 } 2943 2944 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2945 return 0; 2946 } 2947 2948 static void __exit uvc_cleanup(void) 2949 { 2950 usb_deregister(&uvc_driver.driver); 2951 uvc_debugfs_cleanup(); 2952 } 2953 2954 module_init(uvc_init); 2955 module_exit(uvc_cleanup); 2956 2957 MODULE_AUTHOR(DRIVER_AUTHOR); 2958 MODULE_DESCRIPTION(DRIVER_DESC); 2959 MODULE_LICENSE("GPL"); 2960 MODULE_VERSION(DRIVER_VERSION); 2961 2962