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