1 /* 2 * uvc_driver.c -- USB Video Class driver 3 * 4 * Copyright (C) 2005-2010 5 * Laurent Pinchart (laurent.pinchart@ideasonboard.com) 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 */ 13 14 #include <linux/atomic.h> 15 #include <linux/kernel.h> 16 #include <linux/list.h> 17 #include <linux/module.h> 18 #include <linux/slab.h> 19 #include <linux/usb.h> 20 #include <linux/videodev2.h> 21 #include <linux/vmalloc.h> 22 #include <linux/wait.h> 23 #include <linux/version.h> 24 #include <asm/unaligned.h> 25 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-ioctl.h> 28 29 #include "uvcvideo.h" 30 31 #define DRIVER_AUTHOR "Laurent Pinchart " \ 32 "<laurent.pinchart@ideasonboard.com>" 33 #define DRIVER_DESC "USB Video Class driver" 34 35 unsigned int uvc_clock_param = CLOCK_MONOTONIC; 36 unsigned int uvc_hw_timestamps_param; 37 unsigned int uvc_no_drop_param; 38 static unsigned int uvc_quirks_param = -1; 39 unsigned int uvc_trace_param; 40 unsigned int uvc_timeout_param = UVC_CTRL_STREAMING_TIMEOUT; 41 42 /* ------------------------------------------------------------------------ 43 * Video formats 44 */ 45 46 static struct uvc_format_desc uvc_fmts[] = { 47 { 48 .name = "YUV 4:2:2 (YUYV)", 49 .guid = UVC_GUID_FORMAT_YUY2, 50 .fcc = V4L2_PIX_FMT_YUYV, 51 }, 52 { 53 .name = "YUV 4:2:2 (YUYV)", 54 .guid = UVC_GUID_FORMAT_YUY2_ISIGHT, 55 .fcc = V4L2_PIX_FMT_YUYV, 56 }, 57 { 58 .name = "YUV 4:2:0 (NV12)", 59 .guid = UVC_GUID_FORMAT_NV12, 60 .fcc = V4L2_PIX_FMT_NV12, 61 }, 62 { 63 .name = "MJPEG", 64 .guid = UVC_GUID_FORMAT_MJPEG, 65 .fcc = V4L2_PIX_FMT_MJPEG, 66 }, 67 { 68 .name = "YVU 4:2:0 (YV12)", 69 .guid = UVC_GUID_FORMAT_YV12, 70 .fcc = V4L2_PIX_FMT_YVU420, 71 }, 72 { 73 .name = "YUV 4:2:0 (I420)", 74 .guid = UVC_GUID_FORMAT_I420, 75 .fcc = V4L2_PIX_FMT_YUV420, 76 }, 77 { 78 .name = "YUV 4:2:0 (M420)", 79 .guid = UVC_GUID_FORMAT_M420, 80 .fcc = V4L2_PIX_FMT_M420, 81 }, 82 { 83 .name = "YUV 4:2:2 (UYVY)", 84 .guid = UVC_GUID_FORMAT_UYVY, 85 .fcc = V4L2_PIX_FMT_UYVY, 86 }, 87 { 88 .name = "Greyscale 8-bit (Y800)", 89 .guid = UVC_GUID_FORMAT_Y800, 90 .fcc = V4L2_PIX_FMT_GREY, 91 }, 92 { 93 .name = "Greyscale 8-bit (Y8 )", 94 .guid = UVC_GUID_FORMAT_Y8, 95 .fcc = V4L2_PIX_FMT_GREY, 96 }, 97 { 98 .name = "Greyscale 8-bit (D3DFMT_L8)", 99 .guid = UVC_GUID_FORMAT_D3DFMT_L8, 100 .fcc = V4L2_PIX_FMT_GREY, 101 }, 102 { 103 .name = "IR 8-bit (L8_IR)", 104 .guid = UVC_GUID_FORMAT_KSMEDIA_L8_IR, 105 .fcc = V4L2_PIX_FMT_GREY, 106 }, 107 { 108 .name = "Greyscale 10-bit (Y10 )", 109 .guid = UVC_GUID_FORMAT_Y10, 110 .fcc = V4L2_PIX_FMT_Y10, 111 }, 112 { 113 .name = "Greyscale 12-bit (Y12 )", 114 .guid = UVC_GUID_FORMAT_Y12, 115 .fcc = V4L2_PIX_FMT_Y12, 116 }, 117 { 118 .name = "Greyscale 16-bit (Y16 )", 119 .guid = UVC_GUID_FORMAT_Y16, 120 .fcc = V4L2_PIX_FMT_Y16, 121 }, 122 { 123 .name = "BGGR Bayer (BY8 )", 124 .guid = UVC_GUID_FORMAT_BY8, 125 .fcc = V4L2_PIX_FMT_SBGGR8, 126 }, 127 { 128 .name = "BGGR Bayer (BA81)", 129 .guid = UVC_GUID_FORMAT_BA81, 130 .fcc = V4L2_PIX_FMT_SBGGR8, 131 }, 132 { 133 .name = "GBRG Bayer (GBRG)", 134 .guid = UVC_GUID_FORMAT_GBRG, 135 .fcc = V4L2_PIX_FMT_SGBRG8, 136 }, 137 { 138 .name = "GRBG Bayer (GRBG)", 139 .guid = UVC_GUID_FORMAT_GRBG, 140 .fcc = V4L2_PIX_FMT_SGRBG8, 141 }, 142 { 143 .name = "RGGB Bayer (RGGB)", 144 .guid = UVC_GUID_FORMAT_RGGB, 145 .fcc = V4L2_PIX_FMT_SRGGB8, 146 }, 147 { 148 .name = "RGB565", 149 .guid = UVC_GUID_FORMAT_RGBP, 150 .fcc = V4L2_PIX_FMT_RGB565, 151 }, 152 { 153 .name = "BGR 8:8:8 (BGR3)", 154 .guid = UVC_GUID_FORMAT_BGR3, 155 .fcc = V4L2_PIX_FMT_BGR24, 156 }, 157 { 158 .name = "H.264", 159 .guid = UVC_GUID_FORMAT_H264, 160 .fcc = V4L2_PIX_FMT_H264, 161 }, 162 { 163 .name = "Greyscale 8 L/R (Y8I)", 164 .guid = UVC_GUID_FORMAT_Y8I, 165 .fcc = V4L2_PIX_FMT_Y8I, 166 }, 167 { 168 .name = "Greyscale 12 L/R (Y12I)", 169 .guid = UVC_GUID_FORMAT_Y12I, 170 .fcc = V4L2_PIX_FMT_Y12I, 171 }, 172 { 173 .name = "Depth data 16-bit (Z16)", 174 .guid = UVC_GUID_FORMAT_Z16, 175 .fcc = V4L2_PIX_FMT_Z16, 176 }, 177 { 178 .name = "Bayer 10-bit (SRGGB10P)", 179 .guid = UVC_GUID_FORMAT_RW10, 180 .fcc = V4L2_PIX_FMT_SRGGB10P, 181 }, 182 { 183 .name = "Bayer 16-bit (SBGGR16)", 184 .guid = UVC_GUID_FORMAT_BG16, 185 .fcc = V4L2_PIX_FMT_SBGGR16, 186 }, 187 { 188 .name = "Bayer 16-bit (SGBRG16)", 189 .guid = UVC_GUID_FORMAT_GB16, 190 .fcc = V4L2_PIX_FMT_SGBRG16, 191 }, 192 { 193 .name = "Bayer 16-bit (SRGGB16)", 194 .guid = UVC_GUID_FORMAT_RG16, 195 .fcc = V4L2_PIX_FMT_SRGGB16, 196 }, 197 { 198 .name = "Bayer 16-bit (SGRBG16)", 199 .guid = UVC_GUID_FORMAT_GR16, 200 .fcc = V4L2_PIX_FMT_SGRBG16, 201 }, 202 { 203 .name = "Depth data 16-bit (Z16)", 204 .guid = UVC_GUID_FORMAT_INVZ, 205 .fcc = V4L2_PIX_FMT_Z16, 206 }, 207 { 208 .name = "Greyscale 10-bit (Y10 )", 209 .guid = UVC_GUID_FORMAT_INVI, 210 .fcc = V4L2_PIX_FMT_Y10, 211 }, 212 { 213 .name = "IR:Depth 26-bit (INZI)", 214 .guid = UVC_GUID_FORMAT_INZI, 215 .fcc = V4L2_PIX_FMT_INZI, 216 }, 217 { 218 .name = "4-bit Depth Confidence (Packed)", 219 .guid = UVC_GUID_FORMAT_CNF4, 220 .fcc = V4L2_PIX_FMT_CNF4, 221 }, 222 }; 223 224 /* ------------------------------------------------------------------------ 225 * Utility functions 226 */ 227 228 struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, 229 u8 epaddr) 230 { 231 struct usb_host_endpoint *ep; 232 unsigned int i; 233 234 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 235 ep = &alts->endpoint[i]; 236 if (ep->desc.bEndpointAddress == epaddr) 237 return ep; 238 } 239 240 return NULL; 241 } 242 243 static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16]) 244 { 245 unsigned int len = ARRAY_SIZE(uvc_fmts); 246 unsigned int i; 247 248 for (i = 0; i < len; ++i) { 249 if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) 250 return &uvc_fmts[i]; 251 } 252 253 return NULL; 254 } 255 256 static u32 uvc_colorspace(const u8 primaries) 257 { 258 static const u8 colorprimaries[] = { 259 0, 260 V4L2_COLORSPACE_SRGB, 261 V4L2_COLORSPACE_470_SYSTEM_M, 262 V4L2_COLORSPACE_470_SYSTEM_BG, 263 V4L2_COLORSPACE_SMPTE170M, 264 V4L2_COLORSPACE_SMPTE240M, 265 }; 266 267 if (primaries < ARRAY_SIZE(colorprimaries)) 268 return colorprimaries[primaries]; 269 270 return 0; 271 } 272 273 /* Simplify a fraction using a simple continued fraction decomposition. The 274 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 275 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 276 * arbitrary parameters to remove non-significative terms from the simple 277 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 278 * respectively seems to give nice results. 279 */ 280 void uvc_simplify_fraction(u32 *numerator, u32 *denominator, 281 unsigned int n_terms, unsigned int threshold) 282 { 283 u32 *an; 284 u32 x, y, r; 285 unsigned int i, n; 286 287 an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); 288 if (an == NULL) 289 return; 290 291 /* Convert the fraction to a simple continued fraction. See 292 * http://mathforum.org/dr.math/faq/faq.fractions.html 293 * Stop if the current term is bigger than or equal to the given 294 * threshold. 295 */ 296 x = *numerator; 297 y = *denominator; 298 299 for (n = 0; n < n_terms && y != 0; ++n) { 300 an[n] = x / y; 301 if (an[n] >= threshold) { 302 if (n < 2) 303 n++; 304 break; 305 } 306 307 r = x - an[n] * y; 308 x = y; 309 y = r; 310 } 311 312 /* Expand the simple continued fraction back to an integer fraction. */ 313 x = 0; 314 y = 1; 315 316 for (i = n; i > 0; --i) { 317 r = y; 318 y = an[i-1] * y + x; 319 x = r; 320 } 321 322 *numerator = y; 323 *denominator = x; 324 kfree(an); 325 } 326 327 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is 328 * to compute numerator / denominator * 10000000 using 32 bit fixed point 329 * arithmetic only. 330 */ 331 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator) 332 { 333 u32 multiplier; 334 335 /* Saturate the result if the operation would overflow. */ 336 if (denominator == 0 || 337 numerator/denominator >= ((u32)-1)/10000000) 338 return (u32)-1; 339 340 /* Divide both the denominator and the multiplier by two until 341 * numerator * multiplier doesn't overflow. If anyone knows a better 342 * algorithm please let me know. 343 */ 344 multiplier = 10000000; 345 while (numerator > ((u32)-1)/multiplier) { 346 multiplier /= 2; 347 denominator /= 2; 348 } 349 350 return denominator ? numerator * multiplier / denominator : 0; 351 } 352 353 /* ------------------------------------------------------------------------ 354 * Terminal and unit management 355 */ 356 357 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 358 { 359 struct uvc_entity *entity; 360 361 list_for_each_entry(entity, &dev->entities, list) { 362 if (entity->id == id) 363 return entity; 364 } 365 366 return NULL; 367 } 368 369 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 370 int id, struct uvc_entity *entity) 371 { 372 unsigned int i; 373 374 if (entity == NULL) 375 entity = list_entry(&dev->entities, struct uvc_entity, list); 376 377 list_for_each_entry_continue(entity, &dev->entities, list) { 378 for (i = 0; i < entity->bNrInPins; ++i) 379 if (entity->baSourceID[i] == id) 380 return entity; 381 } 382 383 return NULL; 384 } 385 386 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 387 { 388 struct uvc_streaming *stream; 389 390 list_for_each_entry(stream, &dev->streams, list) { 391 if (stream->header.bTerminalLink == id) 392 return stream; 393 } 394 395 return NULL; 396 } 397 398 /* ------------------------------------------------------------------------ 399 * Streaming Object Management 400 */ 401 402 static void uvc_stream_delete(struct uvc_streaming *stream) 403 { 404 if (stream->async_wq) 405 destroy_workqueue(stream->async_wq); 406 407 mutex_destroy(&stream->mutex); 408 409 usb_put_intf(stream->intf); 410 411 kfree(stream->format); 412 kfree(stream->header.bmaControls); 413 kfree(stream); 414 } 415 416 static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev, 417 struct usb_interface *intf) 418 { 419 struct uvc_streaming *stream; 420 421 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 422 if (stream == NULL) 423 return NULL; 424 425 mutex_init(&stream->mutex); 426 427 stream->dev = dev; 428 stream->intf = usb_get_intf(intf); 429 stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 430 431 /* Allocate a stream specific work queue for asynchronous tasks. */ 432 stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI, 433 0); 434 if (!stream->async_wq) { 435 uvc_stream_delete(stream); 436 return NULL; 437 } 438 439 return stream; 440 } 441 442 /* ------------------------------------------------------------------------ 443 * Descriptors parsing 444 */ 445 446 static int uvc_parse_format(struct uvc_device *dev, 447 struct uvc_streaming *streaming, struct uvc_format *format, 448 u32 **intervals, unsigned char *buffer, int buflen) 449 { 450 struct usb_interface *intf = streaming->intf; 451 struct usb_host_interface *alts = intf->cur_altsetting; 452 struct uvc_format_desc *fmtdesc; 453 struct uvc_frame *frame; 454 const unsigned char *start = buffer; 455 unsigned int width_multiplier = 1; 456 unsigned int interval; 457 unsigned int i, n; 458 u8 ftype; 459 460 format->type = buffer[2]; 461 format->index = buffer[3]; 462 463 switch (buffer[2]) { 464 case UVC_VS_FORMAT_UNCOMPRESSED: 465 case UVC_VS_FORMAT_FRAME_BASED: 466 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 467 if (buflen < n) { 468 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 469 "interface %d FORMAT error\n", 470 dev->udev->devnum, 471 alts->desc.bInterfaceNumber); 472 return -EINVAL; 473 } 474 475 /* Find the format descriptor from its GUID. */ 476 fmtdesc = uvc_format_by_guid(&buffer[5]); 477 478 if (fmtdesc != NULL) { 479 strscpy(format->name, fmtdesc->name, 480 sizeof(format->name)); 481 format->fcc = fmtdesc->fcc; 482 } else { 483 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 484 &buffer[5]); 485 snprintf(format->name, sizeof(format->name), "%pUl\n", 486 &buffer[5]); 487 format->fcc = 0; 488 } 489 490 format->bpp = buffer[21]; 491 492 /* Some devices report a format that doesn't match what they 493 * really send. 494 */ 495 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 496 if (format->fcc == V4L2_PIX_FMT_YUYV) { 497 strscpy(format->name, "Greyscale 8-bit (Y8 )", 498 sizeof(format->name)); 499 format->fcc = V4L2_PIX_FMT_GREY; 500 format->bpp = 8; 501 width_multiplier = 2; 502 } 503 } 504 505 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 506 ftype = UVC_VS_FRAME_UNCOMPRESSED; 507 } else { 508 ftype = UVC_VS_FRAME_FRAME_BASED; 509 if (buffer[27]) 510 format->flags = UVC_FMT_FLAG_COMPRESSED; 511 } 512 break; 513 514 case UVC_VS_FORMAT_MJPEG: 515 if (buflen < 11) { 516 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 517 "interface %d FORMAT error\n", 518 dev->udev->devnum, 519 alts->desc.bInterfaceNumber); 520 return -EINVAL; 521 } 522 523 strscpy(format->name, "MJPEG", sizeof(format->name)); 524 format->fcc = V4L2_PIX_FMT_MJPEG; 525 format->flags = UVC_FMT_FLAG_COMPRESSED; 526 format->bpp = 0; 527 ftype = UVC_VS_FRAME_MJPEG; 528 break; 529 530 case UVC_VS_FORMAT_DV: 531 if (buflen < 9) { 532 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 533 "interface %d FORMAT error\n", 534 dev->udev->devnum, 535 alts->desc.bInterfaceNumber); 536 return -EINVAL; 537 } 538 539 switch (buffer[8] & 0x7f) { 540 case 0: 541 strscpy(format->name, "SD-DV", sizeof(format->name)); 542 break; 543 case 1: 544 strscpy(format->name, "SDL-DV", sizeof(format->name)); 545 break; 546 case 2: 547 strscpy(format->name, "HD-DV", sizeof(format->name)); 548 break; 549 default: 550 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 551 "interface %d: unknown DV format %u\n", 552 dev->udev->devnum, 553 alts->desc.bInterfaceNumber, buffer[8]); 554 return -EINVAL; 555 } 556 557 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 558 sizeof(format->name)); 559 560 format->fcc = V4L2_PIX_FMT_DV; 561 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 562 format->bpp = 0; 563 ftype = 0; 564 565 /* Create a dummy frame descriptor. */ 566 frame = &format->frame[0]; 567 memset(&format->frame[0], 0, sizeof(format->frame[0])); 568 frame->bFrameIntervalType = 1; 569 frame->dwDefaultFrameInterval = 1; 570 frame->dwFrameInterval = *intervals; 571 *(*intervals)++ = 1; 572 format->nframes = 1; 573 break; 574 575 case UVC_VS_FORMAT_MPEG2TS: 576 case UVC_VS_FORMAT_STREAM_BASED: 577 /* Not supported yet. */ 578 default: 579 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 580 "interface %d unsupported format %u\n", 581 dev->udev->devnum, alts->desc.bInterfaceNumber, 582 buffer[2]); 583 return -EINVAL; 584 } 585 586 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 587 588 buflen -= buffer[0]; 589 buffer += buffer[0]; 590 591 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 592 * based formats have frame descriptors. 593 */ 594 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 595 buffer[2] == ftype) { 596 frame = &format->frame[format->nframes]; 597 if (ftype != UVC_VS_FRAME_FRAME_BASED) 598 n = buflen > 25 ? buffer[25] : 0; 599 else 600 n = buflen > 21 ? buffer[21] : 0; 601 602 n = n ? n : 3; 603 604 if (buflen < 26 + 4*n) { 605 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 606 "interface %d FRAME error\n", dev->udev->devnum, 607 alts->desc.bInterfaceNumber); 608 return -EINVAL; 609 } 610 611 frame->bFrameIndex = buffer[3]; 612 frame->bmCapabilities = buffer[4]; 613 frame->wWidth = get_unaligned_le16(&buffer[5]) 614 * width_multiplier; 615 frame->wHeight = get_unaligned_le16(&buffer[7]); 616 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 617 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 618 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 619 frame->dwMaxVideoFrameBufferSize = 620 get_unaligned_le32(&buffer[17]); 621 frame->dwDefaultFrameInterval = 622 get_unaligned_le32(&buffer[21]); 623 frame->bFrameIntervalType = buffer[25]; 624 } else { 625 frame->dwMaxVideoFrameBufferSize = 0; 626 frame->dwDefaultFrameInterval = 627 get_unaligned_le32(&buffer[17]); 628 frame->bFrameIntervalType = buffer[21]; 629 } 630 frame->dwFrameInterval = *intervals; 631 632 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 633 * completely. Observed behaviours range from setting the 634 * value to 1.1x the actual frame size to hardwiring the 635 * 16 low bits to 0. This results in a higher than necessary 636 * memory usage as well as a wrong image size information. For 637 * uncompressed formats this can be fixed by computing the 638 * value from the frame size. 639 */ 640 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 641 frame->dwMaxVideoFrameBufferSize = format->bpp 642 * frame->wWidth * frame->wHeight / 8; 643 644 /* Some bogus devices report dwMinFrameInterval equal to 645 * dwMaxFrameInterval and have dwFrameIntervalStep set to 646 * zero. Setting all null intervals to 1 fixes the problem and 647 * some other divisions by zero that could happen. 648 */ 649 for (i = 0; i < n; ++i) { 650 interval = get_unaligned_le32(&buffer[26+4*i]); 651 *(*intervals)++ = interval ? interval : 1; 652 } 653 654 /* Make sure that the default frame interval stays between 655 * the boundaries. 656 */ 657 n -= frame->bFrameIntervalType ? 1 : 2; 658 frame->dwDefaultFrameInterval = 659 min(frame->dwFrameInterval[n], 660 max(frame->dwFrameInterval[0], 661 frame->dwDefaultFrameInterval)); 662 663 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 664 frame->bFrameIntervalType = 1; 665 frame->dwFrameInterval[0] = 666 frame->dwDefaultFrameInterval; 667 } 668 669 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 670 frame->wWidth, frame->wHeight, 671 10000000/frame->dwDefaultFrameInterval, 672 (100000000/frame->dwDefaultFrameInterval)%10); 673 674 format->nframes++; 675 buflen -= buffer[0]; 676 buffer += buffer[0]; 677 } 678 679 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 680 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 681 buflen -= buffer[0]; 682 buffer += buffer[0]; 683 } 684 685 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 686 buffer[2] == UVC_VS_COLORFORMAT) { 687 if (buflen < 6) { 688 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 689 "interface %d COLORFORMAT error\n", 690 dev->udev->devnum, 691 alts->desc.bInterfaceNumber); 692 return -EINVAL; 693 } 694 695 format->colorspace = uvc_colorspace(buffer[3]); 696 697 buflen -= buffer[0]; 698 buffer += buffer[0]; 699 } 700 701 return buffer - start; 702 } 703 704 static int uvc_parse_streaming(struct uvc_device *dev, 705 struct usb_interface *intf) 706 { 707 struct uvc_streaming *streaming = NULL; 708 struct uvc_format *format; 709 struct uvc_frame *frame; 710 struct usb_host_interface *alts = &intf->altsetting[0]; 711 unsigned char *_buffer, *buffer = alts->extra; 712 int _buflen, buflen = alts->extralen; 713 unsigned int nformats = 0, nframes = 0, nintervals = 0; 714 unsigned int size, i, n, p; 715 u32 *interval; 716 u16 psize; 717 int ret = -EINVAL; 718 719 if (intf->cur_altsetting->desc.bInterfaceSubClass 720 != UVC_SC_VIDEOSTREAMING) { 721 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 722 "video streaming interface\n", dev->udev->devnum, 723 intf->altsetting[0].desc.bInterfaceNumber); 724 return -EINVAL; 725 } 726 727 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 728 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 729 "claimed\n", dev->udev->devnum, 730 intf->altsetting[0].desc.bInterfaceNumber); 731 return -EINVAL; 732 } 733 734 streaming = uvc_stream_new(dev, intf); 735 if (streaming == NULL) { 736 usb_driver_release_interface(&uvc_driver.driver, intf); 737 return -ENOMEM; 738 } 739 740 /* The Pico iMage webcam has its class-specific interface descriptors 741 * after the endpoint descriptors. 742 */ 743 if (buflen == 0) { 744 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 745 struct usb_host_endpoint *ep = &alts->endpoint[i]; 746 747 if (ep->extralen == 0) 748 continue; 749 750 if (ep->extralen > 2 && 751 ep->extra[1] == USB_DT_CS_INTERFACE) { 752 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 753 "from endpoint %u.\n", i); 754 buffer = alts->endpoint[i].extra; 755 buflen = alts->endpoint[i].extralen; 756 break; 757 } 758 } 759 } 760 761 /* Skip the standard interface descriptors. */ 762 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 763 buflen -= buffer[0]; 764 buffer += buffer[0]; 765 } 766 767 if (buflen <= 2) { 768 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 769 "interface descriptors found.\n"); 770 goto error; 771 } 772 773 /* Parse the header descriptor. */ 774 switch (buffer[2]) { 775 case UVC_VS_OUTPUT_HEADER: 776 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 777 size = 9; 778 break; 779 780 case UVC_VS_INPUT_HEADER: 781 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 782 size = 13; 783 break; 784 785 default: 786 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 787 "%d HEADER descriptor not found.\n", dev->udev->devnum, 788 alts->desc.bInterfaceNumber); 789 goto error; 790 } 791 792 p = buflen >= 4 ? buffer[3] : 0; 793 n = buflen >= size ? buffer[size-1] : 0; 794 795 if (buflen < size + p*n) { 796 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 797 "interface %d HEADER descriptor is invalid.\n", 798 dev->udev->devnum, alts->desc.bInterfaceNumber); 799 goto error; 800 } 801 802 streaming->header.bNumFormats = p; 803 streaming->header.bEndpointAddress = buffer[6]; 804 if (buffer[2] == UVC_VS_INPUT_HEADER) { 805 streaming->header.bmInfo = buffer[7]; 806 streaming->header.bTerminalLink = buffer[8]; 807 streaming->header.bStillCaptureMethod = buffer[9]; 808 streaming->header.bTriggerSupport = buffer[10]; 809 streaming->header.bTriggerUsage = buffer[11]; 810 } else { 811 streaming->header.bTerminalLink = buffer[7]; 812 } 813 streaming->header.bControlSize = n; 814 815 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 816 GFP_KERNEL); 817 if (streaming->header.bmaControls == NULL) { 818 ret = -ENOMEM; 819 goto error; 820 } 821 822 buflen -= buffer[0]; 823 buffer += buffer[0]; 824 825 _buffer = buffer; 826 _buflen = buflen; 827 828 /* Count the format and frame descriptors. */ 829 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 830 switch (_buffer[2]) { 831 case UVC_VS_FORMAT_UNCOMPRESSED: 832 case UVC_VS_FORMAT_MJPEG: 833 case UVC_VS_FORMAT_FRAME_BASED: 834 nformats++; 835 break; 836 837 case UVC_VS_FORMAT_DV: 838 /* DV format has no frame descriptor. We will create a 839 * dummy frame descriptor with a dummy frame interval. 840 */ 841 nformats++; 842 nframes++; 843 nintervals++; 844 break; 845 846 case UVC_VS_FORMAT_MPEG2TS: 847 case UVC_VS_FORMAT_STREAM_BASED: 848 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 849 "interface %d FORMAT %u is not supported.\n", 850 dev->udev->devnum, 851 alts->desc.bInterfaceNumber, _buffer[2]); 852 break; 853 854 case UVC_VS_FRAME_UNCOMPRESSED: 855 case UVC_VS_FRAME_MJPEG: 856 nframes++; 857 if (_buflen > 25) 858 nintervals += _buffer[25] ? _buffer[25] : 3; 859 break; 860 861 case UVC_VS_FRAME_FRAME_BASED: 862 nframes++; 863 if (_buflen > 21) 864 nintervals += _buffer[21] ? _buffer[21] : 3; 865 break; 866 } 867 868 _buflen -= _buffer[0]; 869 _buffer += _buffer[0]; 870 } 871 872 if (nformats == 0) { 873 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 874 "%d has no supported formats defined.\n", 875 dev->udev->devnum, alts->desc.bInterfaceNumber); 876 goto error; 877 } 878 879 size = nformats * sizeof(*format) + nframes * sizeof(*frame) 880 + nintervals * sizeof(*interval); 881 format = kzalloc(size, GFP_KERNEL); 882 if (format == NULL) { 883 ret = -ENOMEM; 884 goto error; 885 } 886 887 frame = (struct uvc_frame *)&format[nformats]; 888 interval = (u32 *)&frame[nframes]; 889 890 streaming->format = format; 891 streaming->nformats = nformats; 892 893 /* Parse the format descriptors. */ 894 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 895 switch (buffer[2]) { 896 case UVC_VS_FORMAT_UNCOMPRESSED: 897 case UVC_VS_FORMAT_MJPEG: 898 case UVC_VS_FORMAT_DV: 899 case UVC_VS_FORMAT_FRAME_BASED: 900 format->frame = frame; 901 ret = uvc_parse_format(dev, streaming, format, 902 &interval, buffer, buflen); 903 if (ret < 0) 904 goto error; 905 906 frame += format->nframes; 907 format++; 908 909 buflen -= ret; 910 buffer += ret; 911 continue; 912 913 default: 914 break; 915 } 916 917 buflen -= buffer[0]; 918 buffer += buffer[0]; 919 } 920 921 if (buflen) 922 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 923 "%d has %u bytes of trailing descriptor garbage.\n", 924 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 925 926 /* Parse the alternate settings to find the maximum bandwidth. */ 927 for (i = 0; i < intf->num_altsetting; ++i) { 928 struct usb_host_endpoint *ep; 929 alts = &intf->altsetting[i]; 930 ep = uvc_find_endpoint(alts, 931 streaming->header.bEndpointAddress); 932 if (ep == NULL) 933 continue; 934 935 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 936 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 937 if (psize > streaming->maxpsize) 938 streaming->maxpsize = psize; 939 } 940 941 list_add_tail(&streaming->list, &dev->streams); 942 return 0; 943 944 error: 945 usb_driver_release_interface(&uvc_driver.driver, intf); 946 uvc_stream_delete(streaming); 947 return ret; 948 } 949 950 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 951 unsigned int num_pads, unsigned int extra_size) 952 { 953 struct uvc_entity *entity; 954 unsigned int num_inputs; 955 unsigned int size; 956 unsigned int i; 957 958 extra_size = roundup(extra_size, sizeof(*entity->pads)); 959 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 960 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 961 + num_inputs; 962 entity = kzalloc(size, GFP_KERNEL); 963 if (entity == NULL) 964 return NULL; 965 966 entity->id = id; 967 entity->type = type; 968 969 entity->num_links = 0; 970 entity->num_pads = num_pads; 971 entity->pads = ((void *)(entity + 1)) + extra_size; 972 973 for (i = 0; i < num_inputs; ++i) 974 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 975 if (!UVC_ENTITY_IS_OTERM(entity)) 976 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 977 978 entity->bNrInPins = num_inputs; 979 entity->baSourceID = (u8 *)(&entity->pads[num_pads]); 980 981 return entity; 982 } 983 984 /* Parse vendor-specific extensions. */ 985 static int uvc_parse_vendor_control(struct uvc_device *dev, 986 const unsigned char *buffer, int buflen) 987 { 988 struct usb_device *udev = dev->udev; 989 struct usb_host_interface *alts = dev->intf->cur_altsetting; 990 struct uvc_entity *unit; 991 unsigned int n, p; 992 int handled = 0; 993 994 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 995 case 0x046d: /* Logitech */ 996 if (buffer[1] != 0x41 || buffer[2] != 0x01) 997 break; 998 999 /* Logitech implements several vendor specific functions 1000 * through vendor specific extension units (LXU). 1001 * 1002 * The LXU descriptors are similar to XU descriptors 1003 * (see "USB Device Video Class for Video Devices", section 1004 * 3.7.2.6 "Extension Unit Descriptor") with the following 1005 * differences: 1006 * 1007 * ---------------------------------------------------------- 1008 * 0 bLength 1 Number 1009 * Size of this descriptor, in bytes: 24+p+n*2 1010 * ---------------------------------------------------------- 1011 * 23+p+n bmControlsType N Bitmap 1012 * Individual bits in the set are defined: 1013 * 0: Absolute 1014 * 1: Relative 1015 * 1016 * This bitset is mapped exactly the same as bmControls. 1017 * ---------------------------------------------------------- 1018 * 23+p+n*2 bReserved 1 Boolean 1019 * ---------------------------------------------------------- 1020 * 24+p+n*2 iExtension 1 Index 1021 * Index of a string descriptor that describes this 1022 * extension unit. 1023 * ---------------------------------------------------------- 1024 */ 1025 p = buflen >= 22 ? buffer[21] : 0; 1026 n = buflen >= 25 + p ? buffer[22+p] : 0; 1027 1028 if (buflen < 25 + p + 2*n) { 1029 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1030 "interface %d EXTENSION_UNIT error\n", 1031 udev->devnum, alts->desc.bInterfaceNumber); 1032 break; 1033 } 1034 1035 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 1036 p + 1, 2*n); 1037 if (unit == NULL) 1038 return -ENOMEM; 1039 1040 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1041 unit->extension.bNumControls = buffer[20]; 1042 memcpy(unit->baSourceID, &buffer[22], p); 1043 unit->extension.bControlSize = buffer[22+p]; 1044 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1045 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit) 1046 + n; 1047 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 1048 1049 if (buffer[24+p+2*n] != 0) 1050 usb_string(udev, buffer[24+p+2*n], unit->name, 1051 sizeof(unit->name)); 1052 else 1053 sprintf(unit->name, "Extension %u", buffer[3]); 1054 1055 list_add_tail(&unit->list, &dev->entities); 1056 handled = 1; 1057 break; 1058 } 1059 1060 return handled; 1061 } 1062 1063 static int uvc_parse_standard_control(struct uvc_device *dev, 1064 const unsigned char *buffer, int buflen) 1065 { 1066 struct usb_device *udev = dev->udev; 1067 struct uvc_entity *unit, *term; 1068 struct usb_interface *intf; 1069 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1070 unsigned int i, n, p, len; 1071 u16 type; 1072 1073 switch (buffer[2]) { 1074 case UVC_VC_HEADER: 1075 n = buflen >= 12 ? buffer[11] : 0; 1076 1077 if (buflen < 12 + n) { 1078 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1079 "interface %d HEADER error\n", udev->devnum, 1080 alts->desc.bInterfaceNumber); 1081 return -EINVAL; 1082 } 1083 1084 dev->uvc_version = get_unaligned_le16(&buffer[3]); 1085 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 1086 1087 /* Parse all USB Video Streaming interfaces. */ 1088 for (i = 0; i < n; ++i) { 1089 intf = usb_ifnum_to_if(udev, buffer[12+i]); 1090 if (intf == NULL) { 1091 uvc_trace(UVC_TRACE_DESCR, "device %d " 1092 "interface %d doesn't exists\n", 1093 udev->devnum, i); 1094 continue; 1095 } 1096 1097 uvc_parse_streaming(dev, intf); 1098 } 1099 break; 1100 1101 case UVC_VC_INPUT_TERMINAL: 1102 if (buflen < 8) { 1103 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1104 "interface %d INPUT_TERMINAL error\n", 1105 udev->devnum, alts->desc.bInterfaceNumber); 1106 return -EINVAL; 1107 } 1108 1109 /* Make sure the terminal type MSB is not null, otherwise it 1110 * could be confused with a unit. 1111 */ 1112 type = get_unaligned_le16(&buffer[4]); 1113 if ((type & 0xff00) == 0) { 1114 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1115 "interface %d INPUT_TERMINAL %d has invalid " 1116 "type 0x%04x, skipping\n", udev->devnum, 1117 alts->desc.bInterfaceNumber, 1118 buffer[3], type); 1119 return 0; 1120 } 1121 1122 n = 0; 1123 p = 0; 1124 len = 8; 1125 1126 if (type == UVC_ITT_CAMERA) { 1127 n = buflen >= 15 ? buffer[14] : 0; 1128 len = 15; 1129 1130 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1131 n = buflen >= 9 ? buffer[8] : 0; 1132 p = buflen >= 10 + n ? buffer[9+n] : 0; 1133 len = 10; 1134 } 1135 1136 if (buflen < len + n + p) { 1137 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1138 "interface %d INPUT_TERMINAL error\n", 1139 udev->devnum, alts->desc.bInterfaceNumber); 1140 return -EINVAL; 1141 } 1142 1143 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1144 1, n + p); 1145 if (term == NULL) 1146 return -ENOMEM; 1147 1148 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1149 term->camera.bControlSize = n; 1150 term->camera.bmControls = (u8 *)term + sizeof(*term); 1151 term->camera.wObjectiveFocalLengthMin = 1152 get_unaligned_le16(&buffer[8]); 1153 term->camera.wObjectiveFocalLengthMax = 1154 get_unaligned_le16(&buffer[10]); 1155 term->camera.wOcularFocalLength = 1156 get_unaligned_le16(&buffer[12]); 1157 memcpy(term->camera.bmControls, &buffer[15], n); 1158 } else if (UVC_ENTITY_TYPE(term) == 1159 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1160 term->media.bControlSize = n; 1161 term->media.bmControls = (u8 *)term + sizeof(*term); 1162 term->media.bTransportModeSize = p; 1163 term->media.bmTransportModes = (u8 *)term 1164 + sizeof(*term) + n; 1165 memcpy(term->media.bmControls, &buffer[9], n); 1166 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1167 } 1168 1169 if (buffer[7] != 0) 1170 usb_string(udev, buffer[7], term->name, 1171 sizeof(term->name)); 1172 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1173 sprintf(term->name, "Camera %u", buffer[3]); 1174 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1175 sprintf(term->name, "Media %u", buffer[3]); 1176 else 1177 sprintf(term->name, "Input %u", buffer[3]); 1178 1179 list_add_tail(&term->list, &dev->entities); 1180 break; 1181 1182 case UVC_VC_OUTPUT_TERMINAL: 1183 if (buflen < 9) { 1184 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1185 "interface %d OUTPUT_TERMINAL error\n", 1186 udev->devnum, alts->desc.bInterfaceNumber); 1187 return -EINVAL; 1188 } 1189 1190 /* Make sure the terminal type MSB is not null, otherwise it 1191 * could be confused with a unit. 1192 */ 1193 type = get_unaligned_le16(&buffer[4]); 1194 if ((type & 0xff00) == 0) { 1195 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1196 "interface %d OUTPUT_TERMINAL %d has invalid " 1197 "type 0x%04x, skipping\n", udev->devnum, 1198 alts->desc.bInterfaceNumber, buffer[3], type); 1199 return 0; 1200 } 1201 1202 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1203 1, 0); 1204 if (term == NULL) 1205 return -ENOMEM; 1206 1207 memcpy(term->baSourceID, &buffer[7], 1); 1208 1209 if (buffer[8] != 0) 1210 usb_string(udev, buffer[8], term->name, 1211 sizeof(term->name)); 1212 else 1213 sprintf(term->name, "Output %u", buffer[3]); 1214 1215 list_add_tail(&term->list, &dev->entities); 1216 break; 1217 1218 case UVC_VC_SELECTOR_UNIT: 1219 p = buflen >= 5 ? buffer[4] : 0; 1220 1221 if (buflen < 5 || buflen < 6 + p) { 1222 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1223 "interface %d SELECTOR_UNIT error\n", 1224 udev->devnum, alts->desc.bInterfaceNumber); 1225 return -EINVAL; 1226 } 1227 1228 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1229 if (unit == NULL) 1230 return -ENOMEM; 1231 1232 memcpy(unit->baSourceID, &buffer[5], p); 1233 1234 if (buffer[5+p] != 0) 1235 usb_string(udev, buffer[5+p], unit->name, 1236 sizeof(unit->name)); 1237 else 1238 sprintf(unit->name, "Selector %u", buffer[3]); 1239 1240 list_add_tail(&unit->list, &dev->entities); 1241 break; 1242 1243 case UVC_VC_PROCESSING_UNIT: 1244 n = buflen >= 8 ? buffer[7] : 0; 1245 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1246 1247 if (buflen < p + n) { 1248 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1249 "interface %d PROCESSING_UNIT error\n", 1250 udev->devnum, alts->desc.bInterfaceNumber); 1251 return -EINVAL; 1252 } 1253 1254 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1255 if (unit == NULL) 1256 return -ENOMEM; 1257 1258 memcpy(unit->baSourceID, &buffer[4], 1); 1259 unit->processing.wMaxMultiplier = 1260 get_unaligned_le16(&buffer[5]); 1261 unit->processing.bControlSize = buffer[7]; 1262 unit->processing.bmControls = (u8 *)unit + sizeof(*unit); 1263 memcpy(unit->processing.bmControls, &buffer[8], n); 1264 if (dev->uvc_version >= 0x0110) 1265 unit->processing.bmVideoStandards = buffer[9+n]; 1266 1267 if (buffer[8+n] != 0) 1268 usb_string(udev, buffer[8+n], unit->name, 1269 sizeof(unit->name)); 1270 else 1271 sprintf(unit->name, "Processing %u", buffer[3]); 1272 1273 list_add_tail(&unit->list, &dev->entities); 1274 break; 1275 1276 case UVC_VC_EXTENSION_UNIT: 1277 p = buflen >= 22 ? buffer[21] : 0; 1278 n = buflen >= 24 + p ? buffer[22+p] : 0; 1279 1280 if (buflen < 24 + p + n) { 1281 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1282 "interface %d EXTENSION_UNIT error\n", 1283 udev->devnum, alts->desc.bInterfaceNumber); 1284 return -EINVAL; 1285 } 1286 1287 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1288 if (unit == NULL) 1289 return -ENOMEM; 1290 1291 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1292 unit->extension.bNumControls = buffer[20]; 1293 memcpy(unit->baSourceID, &buffer[22], p); 1294 unit->extension.bControlSize = buffer[22+p]; 1295 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1296 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1297 1298 if (buffer[23+p+n] != 0) 1299 usb_string(udev, buffer[23+p+n], unit->name, 1300 sizeof(unit->name)); 1301 else 1302 sprintf(unit->name, "Extension %u", buffer[3]); 1303 1304 list_add_tail(&unit->list, &dev->entities); 1305 break; 1306 1307 default: 1308 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1309 "descriptor (%u)\n", buffer[2]); 1310 break; 1311 } 1312 1313 return 0; 1314 } 1315 1316 static int uvc_parse_control(struct uvc_device *dev) 1317 { 1318 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1319 unsigned char *buffer = alts->extra; 1320 int buflen = alts->extralen; 1321 int ret; 1322 1323 /* Parse the default alternate setting only, as the UVC specification 1324 * defines a single alternate setting, the default alternate setting 1325 * zero. 1326 */ 1327 1328 while (buflen > 2) { 1329 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1330 buffer[1] != USB_DT_CS_INTERFACE) 1331 goto next_descriptor; 1332 1333 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1334 return ret; 1335 1336 next_descriptor: 1337 buflen -= buffer[0]; 1338 buffer += buffer[0]; 1339 } 1340 1341 /* Check if the optional status endpoint is present. Built-in iSight 1342 * webcams have an interrupt endpoint but spit proprietary data that 1343 * don't conform to the UVC status endpoint messages. Don't try to 1344 * handle the interrupt endpoint for those cameras. 1345 */ 1346 if (alts->desc.bNumEndpoints == 1 && 1347 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1348 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1349 struct usb_endpoint_descriptor *desc = &ep->desc; 1350 1351 if (usb_endpoint_is_int_in(desc) && 1352 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1353 desc->bInterval != 0) { 1354 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1355 "(addr %02x).\n", desc->bEndpointAddress); 1356 dev->int_ep = ep; 1357 } 1358 } 1359 1360 return 0; 1361 } 1362 1363 /* ------------------------------------------------------------------------ 1364 * UVC device scan 1365 */ 1366 1367 /* 1368 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1369 * and containing the following units: 1370 * 1371 * - one or more Output Terminals (USB Streaming or Display) 1372 * - zero or one Processing Unit 1373 * - zero, one or more single-input Selector Units 1374 * - zero or one multiple-input Selector Units, provided all inputs are 1375 * connected to input terminals 1376 * - zero, one or mode single-input Extension Units 1377 * - one or more Input Terminals (Camera, External or USB Streaming) 1378 * 1379 * The terminal and units must match on of the following structures: 1380 * 1381 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1382 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1383 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1384 * 1385 * +---------+ +---------+ -> OTT_*(0) 1386 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1387 * +---------+ +---------+ -> OTT_*(n) 1388 * 1389 * The Processing Unit and Extension Units can be in any order. Additional 1390 * Extension Units connected to the main chain as single-unit branches are 1391 * also supported. Single-input Selector Units are ignored. 1392 */ 1393 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1394 struct uvc_entity *entity) 1395 { 1396 switch (UVC_ENTITY_TYPE(entity)) { 1397 case UVC_VC_EXTENSION_UNIT: 1398 if (uvc_trace_param & UVC_TRACE_PROBE) 1399 printk(KERN_CONT " <- XU %d", entity->id); 1400 1401 if (entity->bNrInPins != 1) { 1402 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1403 "than 1 input pin.\n", entity->id); 1404 return -1; 1405 } 1406 1407 break; 1408 1409 case UVC_VC_PROCESSING_UNIT: 1410 if (uvc_trace_param & UVC_TRACE_PROBE) 1411 printk(KERN_CONT " <- PU %d", entity->id); 1412 1413 if (chain->processing != NULL) { 1414 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1415 "Processing Units in chain.\n"); 1416 return -1; 1417 } 1418 1419 chain->processing = entity; 1420 break; 1421 1422 case UVC_VC_SELECTOR_UNIT: 1423 if (uvc_trace_param & UVC_TRACE_PROBE) 1424 printk(KERN_CONT " <- SU %d", entity->id); 1425 1426 /* Single-input selector units are ignored. */ 1427 if (entity->bNrInPins == 1) 1428 break; 1429 1430 if (chain->selector != NULL) { 1431 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1432 "Units in chain.\n"); 1433 return -1; 1434 } 1435 1436 chain->selector = entity; 1437 break; 1438 1439 case UVC_ITT_VENDOR_SPECIFIC: 1440 case UVC_ITT_CAMERA: 1441 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1442 if (uvc_trace_param & UVC_TRACE_PROBE) 1443 printk(KERN_CONT " <- IT %d\n", entity->id); 1444 1445 break; 1446 1447 case UVC_OTT_VENDOR_SPECIFIC: 1448 case UVC_OTT_DISPLAY: 1449 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1450 if (uvc_trace_param & UVC_TRACE_PROBE) 1451 printk(KERN_CONT " OT %d", entity->id); 1452 1453 break; 1454 1455 case UVC_TT_STREAMING: 1456 if (UVC_ENTITY_IS_ITERM(entity)) { 1457 if (uvc_trace_param & UVC_TRACE_PROBE) 1458 printk(KERN_CONT " <- IT %d\n", entity->id); 1459 } else { 1460 if (uvc_trace_param & UVC_TRACE_PROBE) 1461 printk(KERN_CONT " OT %d", entity->id); 1462 } 1463 1464 break; 1465 1466 default: 1467 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1468 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1469 return -1; 1470 } 1471 1472 list_add_tail(&entity->chain, &chain->entities); 1473 return 0; 1474 } 1475 1476 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1477 struct uvc_entity *entity, struct uvc_entity *prev) 1478 { 1479 struct uvc_entity *forward; 1480 int found; 1481 1482 /* Forward scan */ 1483 forward = NULL; 1484 found = 0; 1485 1486 while (1) { 1487 forward = uvc_entity_by_reference(chain->dev, entity->id, 1488 forward); 1489 if (forward == NULL) 1490 break; 1491 if (forward == prev) 1492 continue; 1493 1494 switch (UVC_ENTITY_TYPE(forward)) { 1495 case UVC_VC_EXTENSION_UNIT: 1496 if (forward->bNrInPins != 1) { 1497 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1498 "has more than 1 input pin.\n", 1499 entity->id); 1500 return -EINVAL; 1501 } 1502 1503 list_add_tail(&forward->chain, &chain->entities); 1504 if (uvc_trace_param & UVC_TRACE_PROBE) { 1505 if (!found) 1506 printk(KERN_CONT " (->"); 1507 1508 printk(KERN_CONT " XU %d", forward->id); 1509 found = 1; 1510 } 1511 break; 1512 1513 case UVC_OTT_VENDOR_SPECIFIC: 1514 case UVC_OTT_DISPLAY: 1515 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1516 case UVC_TT_STREAMING: 1517 if (UVC_ENTITY_IS_ITERM(forward)) { 1518 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1519 "terminal %u.\n", forward->id); 1520 return -EINVAL; 1521 } 1522 1523 list_add_tail(&forward->chain, &chain->entities); 1524 if (uvc_trace_param & UVC_TRACE_PROBE) { 1525 if (!found) 1526 printk(KERN_CONT " (->"); 1527 1528 printk(KERN_CONT " OT %d", forward->id); 1529 found = 1; 1530 } 1531 break; 1532 } 1533 } 1534 if (found) 1535 printk(KERN_CONT ")"); 1536 1537 return 0; 1538 } 1539 1540 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1541 struct uvc_entity **_entity) 1542 { 1543 struct uvc_entity *entity = *_entity; 1544 struct uvc_entity *term; 1545 int id = -EINVAL, i; 1546 1547 switch (UVC_ENTITY_TYPE(entity)) { 1548 case UVC_VC_EXTENSION_UNIT: 1549 case UVC_VC_PROCESSING_UNIT: 1550 id = entity->baSourceID[0]; 1551 break; 1552 1553 case UVC_VC_SELECTOR_UNIT: 1554 /* Single-input selector units are ignored. */ 1555 if (entity->bNrInPins == 1) { 1556 id = entity->baSourceID[0]; 1557 break; 1558 } 1559 1560 if (uvc_trace_param & UVC_TRACE_PROBE) 1561 printk(KERN_CONT " <- IT"); 1562 1563 chain->selector = entity; 1564 for (i = 0; i < entity->bNrInPins; ++i) { 1565 id = entity->baSourceID[i]; 1566 term = uvc_entity_by_id(chain->dev, id); 1567 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1568 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1569 "input %d isn't connected to an " 1570 "input terminal\n", entity->id, i); 1571 return -1; 1572 } 1573 1574 if (uvc_trace_param & UVC_TRACE_PROBE) 1575 printk(KERN_CONT " %d", term->id); 1576 1577 list_add_tail(&term->chain, &chain->entities); 1578 uvc_scan_chain_forward(chain, term, entity); 1579 } 1580 1581 if (uvc_trace_param & UVC_TRACE_PROBE) 1582 printk(KERN_CONT "\n"); 1583 1584 id = 0; 1585 break; 1586 1587 case UVC_ITT_VENDOR_SPECIFIC: 1588 case UVC_ITT_CAMERA: 1589 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1590 case UVC_OTT_VENDOR_SPECIFIC: 1591 case UVC_OTT_DISPLAY: 1592 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1593 case UVC_TT_STREAMING: 1594 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1595 break; 1596 } 1597 1598 if (id <= 0) { 1599 *_entity = NULL; 1600 return id; 1601 } 1602 1603 entity = uvc_entity_by_id(chain->dev, id); 1604 if (entity == NULL) { 1605 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1606 "unknown entity %d.\n", id); 1607 return -EINVAL; 1608 } 1609 1610 *_entity = entity; 1611 return 0; 1612 } 1613 1614 static int uvc_scan_chain(struct uvc_video_chain *chain, 1615 struct uvc_entity *term) 1616 { 1617 struct uvc_entity *entity, *prev; 1618 1619 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1620 1621 entity = term; 1622 prev = NULL; 1623 1624 while (entity != NULL) { 1625 /* Entity must not be part of an existing chain */ 1626 if (entity->chain.next || entity->chain.prev) { 1627 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1628 "entity %d already in chain.\n", entity->id); 1629 return -EINVAL; 1630 } 1631 1632 /* Process entity */ 1633 if (uvc_scan_chain_entity(chain, entity) < 0) 1634 return -EINVAL; 1635 1636 /* Forward scan */ 1637 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1638 return -EINVAL; 1639 1640 /* Backward scan */ 1641 prev = entity; 1642 if (uvc_scan_chain_backward(chain, &entity) < 0) 1643 return -EINVAL; 1644 } 1645 1646 return 0; 1647 } 1648 1649 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1650 char *buffer) 1651 { 1652 struct uvc_entity *term; 1653 unsigned int nterms = 0; 1654 char *p = buffer; 1655 1656 list_for_each_entry(term, terms, chain) { 1657 if (!UVC_ENTITY_IS_TERM(term) || 1658 UVC_TERM_DIRECTION(term) != dir) 1659 continue; 1660 1661 if (nterms) 1662 p += sprintf(p, ","); 1663 if (++nterms >= 4) { 1664 p += sprintf(p, "..."); 1665 break; 1666 } 1667 p += sprintf(p, "%u", term->id); 1668 } 1669 1670 return p - buffer; 1671 } 1672 1673 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1674 { 1675 static char buffer[43]; 1676 char *p = buffer; 1677 1678 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1679 p += sprintf(p, " -> "); 1680 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1681 1682 return buffer; 1683 } 1684 1685 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev) 1686 { 1687 struct uvc_video_chain *chain; 1688 1689 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1690 if (chain == NULL) 1691 return NULL; 1692 1693 INIT_LIST_HEAD(&chain->entities); 1694 mutex_init(&chain->ctrl_mutex); 1695 chain->dev = dev; 1696 v4l2_prio_init(&chain->prio); 1697 1698 return chain; 1699 } 1700 1701 /* 1702 * Fallback heuristic for devices that don't connect units and terminals in a 1703 * valid chain. 1704 * 1705 * Some devices have invalid baSourceID references, causing uvc_scan_chain() 1706 * to fail, but if we just take the entities we can find and put them together 1707 * in the most sensible chain we can think of, turns out they do work anyway. 1708 * Note: This heuristic assumes there is a single chain. 1709 * 1710 * At the time of writing, devices known to have such a broken chain are 1711 * - Acer Integrated Camera (5986:055a) 1712 * - Realtek rtl157a7 (0bda:57a7) 1713 */ 1714 static int uvc_scan_fallback(struct uvc_device *dev) 1715 { 1716 struct uvc_video_chain *chain; 1717 struct uvc_entity *iterm = NULL; 1718 struct uvc_entity *oterm = NULL; 1719 struct uvc_entity *entity; 1720 struct uvc_entity *prev; 1721 1722 /* 1723 * Start by locating the input and output terminals. We only support 1724 * devices with exactly one of each for now. 1725 */ 1726 list_for_each_entry(entity, &dev->entities, list) { 1727 if (UVC_ENTITY_IS_ITERM(entity)) { 1728 if (iterm) 1729 return -EINVAL; 1730 iterm = entity; 1731 } 1732 1733 if (UVC_ENTITY_IS_OTERM(entity)) { 1734 if (oterm) 1735 return -EINVAL; 1736 oterm = entity; 1737 } 1738 } 1739 1740 if (iterm == NULL || oterm == NULL) 1741 return -EINVAL; 1742 1743 /* Allocate the chain and fill it. */ 1744 chain = uvc_alloc_chain(dev); 1745 if (chain == NULL) 1746 return -ENOMEM; 1747 1748 if (uvc_scan_chain_entity(chain, oterm) < 0) 1749 goto error; 1750 1751 prev = oterm; 1752 1753 /* 1754 * Add all Processing and Extension Units with two pads. The order 1755 * doesn't matter much, use reverse list traversal to connect units in 1756 * UVC descriptor order as we build the chain from output to input. This 1757 * leads to units appearing in the order meant by the manufacturer for 1758 * the cameras known to require this heuristic. 1759 */ 1760 list_for_each_entry_reverse(entity, &dev->entities, list) { 1761 if (entity->type != UVC_VC_PROCESSING_UNIT && 1762 entity->type != UVC_VC_EXTENSION_UNIT) 1763 continue; 1764 1765 if (entity->num_pads != 2) 1766 continue; 1767 1768 if (uvc_scan_chain_entity(chain, entity) < 0) 1769 goto error; 1770 1771 prev->baSourceID[0] = entity->id; 1772 prev = entity; 1773 } 1774 1775 if (uvc_scan_chain_entity(chain, iterm) < 0) 1776 goto error; 1777 1778 prev->baSourceID[0] = iterm->id; 1779 1780 list_add_tail(&chain->list, &dev->chains); 1781 1782 uvc_trace(UVC_TRACE_PROBE, 1783 "Found a video chain by fallback heuristic (%s).\n", 1784 uvc_print_chain(chain)); 1785 1786 return 0; 1787 1788 error: 1789 kfree(chain); 1790 return -EINVAL; 1791 } 1792 1793 /* 1794 * Scan the device for video chains and register video devices. 1795 * 1796 * Chains are scanned starting at their output terminals and walked backwards. 1797 */ 1798 static int uvc_scan_device(struct uvc_device *dev) 1799 { 1800 struct uvc_video_chain *chain; 1801 struct uvc_entity *term; 1802 1803 list_for_each_entry(term, &dev->entities, list) { 1804 if (!UVC_ENTITY_IS_OTERM(term)) 1805 continue; 1806 1807 /* If the terminal is already included in a chain, skip it. 1808 * This can happen for chains that have multiple output 1809 * terminals, where all output terminals beside the first one 1810 * will be inserted in the chain in forward scans. 1811 */ 1812 if (term->chain.next || term->chain.prev) 1813 continue; 1814 1815 chain = uvc_alloc_chain(dev); 1816 if (chain == NULL) 1817 return -ENOMEM; 1818 1819 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1820 1821 if (uvc_scan_chain(chain, term) < 0) { 1822 kfree(chain); 1823 continue; 1824 } 1825 1826 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1827 uvc_print_chain(chain)); 1828 1829 list_add_tail(&chain->list, &dev->chains); 1830 } 1831 1832 if (list_empty(&dev->chains)) 1833 uvc_scan_fallback(dev); 1834 1835 if (list_empty(&dev->chains)) { 1836 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1837 return -1; 1838 } 1839 1840 return 0; 1841 } 1842 1843 /* ------------------------------------------------------------------------ 1844 * Video device registration and unregistration 1845 */ 1846 1847 /* 1848 * Delete the UVC device. 1849 * 1850 * Called by the kernel when the last reference to the uvc_device structure 1851 * is released. 1852 * 1853 * As this function is called after or during disconnect(), all URBs have 1854 * already been cancelled by the USB core. There is no need to kill the 1855 * interrupt URB manually. 1856 */ 1857 static void uvc_delete(struct kref *kref) 1858 { 1859 struct uvc_device *dev = container_of(kref, struct uvc_device, ref); 1860 struct list_head *p, *n; 1861 1862 uvc_status_cleanup(dev); 1863 uvc_ctrl_cleanup_device(dev); 1864 1865 usb_put_intf(dev->intf); 1866 usb_put_dev(dev->udev); 1867 1868 #ifdef CONFIG_MEDIA_CONTROLLER 1869 media_device_cleanup(&dev->mdev); 1870 #endif 1871 1872 list_for_each_safe(p, n, &dev->chains) { 1873 struct uvc_video_chain *chain; 1874 chain = list_entry(p, struct uvc_video_chain, list); 1875 kfree(chain); 1876 } 1877 1878 list_for_each_safe(p, n, &dev->entities) { 1879 struct uvc_entity *entity; 1880 entity = list_entry(p, struct uvc_entity, list); 1881 #ifdef CONFIG_MEDIA_CONTROLLER 1882 uvc_mc_cleanup_entity(entity); 1883 #endif 1884 kfree(entity); 1885 } 1886 1887 list_for_each_safe(p, n, &dev->streams) { 1888 struct uvc_streaming *streaming; 1889 streaming = list_entry(p, struct uvc_streaming, list); 1890 usb_driver_release_interface(&uvc_driver.driver, 1891 streaming->intf); 1892 uvc_stream_delete(streaming); 1893 } 1894 1895 kfree(dev); 1896 } 1897 1898 static void uvc_release(struct video_device *vdev) 1899 { 1900 struct uvc_streaming *stream = video_get_drvdata(vdev); 1901 struct uvc_device *dev = stream->dev; 1902 1903 kref_put(&dev->ref, uvc_delete); 1904 } 1905 1906 /* 1907 * Unregister the video devices. 1908 */ 1909 static void uvc_unregister_video(struct uvc_device *dev) 1910 { 1911 struct uvc_streaming *stream; 1912 1913 list_for_each_entry(stream, &dev->streams, list) { 1914 if (!video_is_registered(&stream->vdev)) 1915 continue; 1916 1917 video_unregister_device(&stream->vdev); 1918 video_unregister_device(&stream->meta.vdev); 1919 1920 uvc_debugfs_cleanup_stream(stream); 1921 } 1922 1923 uvc_status_unregister(dev); 1924 1925 if (dev->vdev.dev) 1926 v4l2_device_unregister(&dev->vdev); 1927 #ifdef CONFIG_MEDIA_CONTROLLER 1928 if (media_devnode_is_registered(dev->mdev.devnode)) 1929 media_device_unregister(&dev->mdev); 1930 #endif 1931 } 1932 1933 int uvc_register_video_device(struct uvc_device *dev, 1934 struct uvc_streaming *stream, 1935 struct video_device *vdev, 1936 struct uvc_video_queue *queue, 1937 enum v4l2_buf_type type, 1938 const struct v4l2_file_operations *fops, 1939 const struct v4l2_ioctl_ops *ioctl_ops) 1940 { 1941 int ret; 1942 1943 /* Initialize the video buffers queue. */ 1944 ret = uvc_queue_init(queue, type, !uvc_no_drop_param); 1945 if (ret) 1946 return ret; 1947 1948 /* Register the device with V4L. */ 1949 1950 /* 1951 * We already hold a reference to dev->udev. The video device will be 1952 * unregistered before the reference is released, so we don't need to 1953 * get another one. 1954 */ 1955 vdev->v4l2_dev = &dev->vdev; 1956 vdev->fops = fops; 1957 vdev->ioctl_ops = ioctl_ops; 1958 vdev->release = uvc_release; 1959 vdev->prio = &stream->chain->prio; 1960 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1961 vdev->vfl_dir = VFL_DIR_TX; 1962 else 1963 vdev->vfl_dir = VFL_DIR_RX; 1964 1965 switch (type) { 1966 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1967 default: 1968 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1969 break; 1970 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1971 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 1972 break; 1973 case V4L2_BUF_TYPE_META_CAPTURE: 1974 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; 1975 break; 1976 } 1977 1978 strscpy(vdev->name, dev->name, sizeof(vdev->name)); 1979 1980 /* 1981 * Set the driver data before calling video_register_device, otherwise 1982 * the file open() handler might race us. 1983 */ 1984 video_set_drvdata(vdev, stream); 1985 1986 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); 1987 if (ret < 0) { 1988 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n", 1989 v4l2_type_names[type], ret); 1990 return ret; 1991 } 1992 1993 kref_get(&dev->ref); 1994 return 0; 1995 } 1996 1997 static int uvc_register_video(struct uvc_device *dev, 1998 struct uvc_streaming *stream) 1999 { 2000 int ret; 2001 2002 /* Initialize the streaming interface with default parameters. */ 2003 ret = uvc_video_init(stream); 2004 if (ret < 0) { 2005 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n", 2006 ret); 2007 return ret; 2008 } 2009 2010 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2011 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE 2012 | V4L2_CAP_META_CAPTURE; 2013 else 2014 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 2015 2016 uvc_debugfs_init_stream(stream); 2017 2018 /* Register the device with V4L. */ 2019 return uvc_register_video_device(dev, stream, &stream->vdev, 2020 &stream->queue, stream->type, 2021 &uvc_fops, &uvc_ioctl_ops); 2022 } 2023 2024 /* 2025 * Register all video devices in all chains. 2026 */ 2027 static int uvc_register_terms(struct uvc_device *dev, 2028 struct uvc_video_chain *chain) 2029 { 2030 struct uvc_streaming *stream; 2031 struct uvc_entity *term; 2032 int ret; 2033 2034 list_for_each_entry(term, &chain->entities, chain) { 2035 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 2036 continue; 2037 2038 stream = uvc_stream_by_id(dev, term->id); 2039 if (stream == NULL) { 2040 uvc_printk(KERN_INFO, "No streaming interface found " 2041 "for terminal %u.", term->id); 2042 continue; 2043 } 2044 2045 stream->chain = chain; 2046 ret = uvc_register_video(dev, stream); 2047 if (ret < 0) 2048 return ret; 2049 2050 /* Register a metadata node, but ignore a possible failure, 2051 * complete registration of video nodes anyway. 2052 */ 2053 uvc_meta_register(stream); 2054 2055 term->vdev = &stream->vdev; 2056 } 2057 2058 return 0; 2059 } 2060 2061 static int uvc_register_chains(struct uvc_device *dev) 2062 { 2063 struct uvc_video_chain *chain; 2064 int ret; 2065 2066 list_for_each_entry(chain, &dev->chains, list) { 2067 ret = uvc_register_terms(dev, chain); 2068 if (ret < 0) 2069 return ret; 2070 2071 #ifdef CONFIG_MEDIA_CONTROLLER 2072 ret = uvc_mc_register_entities(chain); 2073 if (ret < 0) 2074 uvc_printk(KERN_INFO, 2075 "Failed to register entities (%d).\n", ret); 2076 #endif 2077 } 2078 2079 return 0; 2080 } 2081 2082 /* ------------------------------------------------------------------------ 2083 * USB probe, disconnect, suspend and resume 2084 */ 2085 2086 static const struct uvc_device_info uvc_quirk_none = { 0 }; 2087 2088 static int uvc_probe(struct usb_interface *intf, 2089 const struct usb_device_id *id) 2090 { 2091 struct usb_device *udev = interface_to_usbdev(intf); 2092 struct uvc_device *dev; 2093 const struct uvc_device_info *info = 2094 (const struct uvc_device_info *)id->driver_info; 2095 int function; 2096 int ret; 2097 2098 if (id->idVendor && id->idProduct) 2099 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 2100 "(%04x:%04x)\n", udev->devpath, id->idVendor, 2101 id->idProduct); 2102 else 2103 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 2104 udev->devpath); 2105 2106 /* Allocate memory for the device and initialize it. */ 2107 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2108 if (dev == NULL) 2109 return -ENOMEM; 2110 2111 INIT_LIST_HEAD(&dev->entities); 2112 INIT_LIST_HEAD(&dev->chains); 2113 INIT_LIST_HEAD(&dev->streams); 2114 kref_init(&dev->ref); 2115 atomic_set(&dev->nmappings, 0); 2116 mutex_init(&dev->lock); 2117 2118 dev->udev = usb_get_dev(udev); 2119 dev->intf = usb_get_intf(intf); 2120 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 2121 dev->info = info ? info : &uvc_quirk_none; 2122 dev->quirks = uvc_quirks_param == -1 2123 ? dev->info->quirks : uvc_quirks_param; 2124 2125 if (udev->product != NULL) 2126 strscpy(dev->name, udev->product, sizeof(dev->name)); 2127 else 2128 snprintf(dev->name, sizeof(dev->name), 2129 "UVC Camera (%04x:%04x)", 2130 le16_to_cpu(udev->descriptor.idVendor), 2131 le16_to_cpu(udev->descriptor.idProduct)); 2132 2133 /* 2134 * Add iFunction or iInterface to names when available as additional 2135 * distinguishers between interfaces. iFunction is prioritized over 2136 * iInterface which matches Windows behavior at the point of writing. 2137 */ 2138 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0) 2139 function = intf->intf_assoc->iFunction; 2140 else 2141 function = intf->cur_altsetting->desc.iInterface; 2142 if (function != 0) { 2143 size_t len; 2144 2145 strlcat(dev->name, ": ", sizeof(dev->name)); 2146 len = strlen(dev->name); 2147 usb_string(udev, function, dev->name + len, 2148 sizeof(dev->name) - len); 2149 } 2150 2151 /* Parse the Video Class control descriptor. */ 2152 if (uvc_parse_control(dev) < 0) { 2153 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 2154 "descriptors.\n"); 2155 goto error; 2156 } 2157 2158 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 2159 dev->uvc_version >> 8, dev->uvc_version & 0xff, 2160 udev->product ? udev->product : "<unnamed>", 2161 le16_to_cpu(udev->descriptor.idVendor), 2162 le16_to_cpu(udev->descriptor.idProduct)); 2163 2164 if (dev->quirks != dev->info->quirks) { 2165 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 2166 "parameter for testing purpose.\n", dev->quirks); 2167 uvc_printk(KERN_INFO, "Please report required quirks to the " 2168 "linux-uvc-devel mailing list.\n"); 2169 } 2170 2171 /* Initialize the media device and register the V4L2 device. */ 2172 #ifdef CONFIG_MEDIA_CONTROLLER 2173 dev->mdev.dev = &intf->dev; 2174 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 2175 if (udev->serial) 2176 strscpy(dev->mdev.serial, udev->serial, 2177 sizeof(dev->mdev.serial)); 2178 strscpy(dev->mdev.bus_info, udev->devpath, sizeof(dev->mdev.bus_info)); 2179 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 2180 media_device_init(&dev->mdev); 2181 2182 dev->vdev.mdev = &dev->mdev; 2183 #endif 2184 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 2185 goto error; 2186 2187 /* Initialize controls. */ 2188 if (uvc_ctrl_init_device(dev) < 0) 2189 goto error; 2190 2191 /* Scan the device for video chains. */ 2192 if (uvc_scan_device(dev) < 0) 2193 goto error; 2194 2195 /* Register video device nodes. */ 2196 if (uvc_register_chains(dev) < 0) 2197 goto error; 2198 2199 #ifdef CONFIG_MEDIA_CONTROLLER 2200 /* Register the media device node */ 2201 if (media_device_register(&dev->mdev) < 0) 2202 goto error; 2203 #endif 2204 /* Save our data pointer in the interface data. */ 2205 usb_set_intfdata(intf, dev); 2206 2207 /* Initialize the interrupt URB. */ 2208 if ((ret = uvc_status_init(dev)) < 0) { 2209 uvc_printk(KERN_INFO, "Unable to initialize the status " 2210 "endpoint (%d), status interrupt will not be " 2211 "supported.\n", ret); 2212 } 2213 2214 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 2215 usb_enable_autosuspend(udev); 2216 return 0; 2217 2218 error: 2219 uvc_unregister_video(dev); 2220 kref_put(&dev->ref, uvc_delete); 2221 return -ENODEV; 2222 } 2223 2224 static void uvc_disconnect(struct usb_interface *intf) 2225 { 2226 struct uvc_device *dev = usb_get_intfdata(intf); 2227 2228 /* Set the USB interface data to NULL. This can be done outside the 2229 * lock, as there's no other reader. 2230 */ 2231 usb_set_intfdata(intf, NULL); 2232 2233 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2234 UVC_SC_VIDEOSTREAMING) 2235 return; 2236 2237 uvc_unregister_video(dev); 2238 kref_put(&dev->ref, uvc_delete); 2239 } 2240 2241 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 2242 { 2243 struct uvc_device *dev = usb_get_intfdata(intf); 2244 struct uvc_streaming *stream; 2245 2246 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 2247 intf->cur_altsetting->desc.bInterfaceNumber); 2248 2249 /* Controls are cached on the fly so they don't need to be saved. */ 2250 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2251 UVC_SC_VIDEOCONTROL) { 2252 mutex_lock(&dev->lock); 2253 if (dev->users) 2254 uvc_status_stop(dev); 2255 mutex_unlock(&dev->lock); 2256 return 0; 2257 } 2258 2259 list_for_each_entry(stream, &dev->streams, list) { 2260 if (stream->intf == intf) 2261 return uvc_video_suspend(stream); 2262 } 2263 2264 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2265 "mismatch.\n"); 2266 return -EINVAL; 2267 } 2268 2269 static int __uvc_resume(struct usb_interface *intf, int reset) 2270 { 2271 struct uvc_device *dev = usb_get_intfdata(intf); 2272 struct uvc_streaming *stream; 2273 int ret = 0; 2274 2275 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2276 intf->cur_altsetting->desc.bInterfaceNumber); 2277 2278 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2279 UVC_SC_VIDEOCONTROL) { 2280 if (reset) { 2281 ret = uvc_ctrl_restore_values(dev); 2282 if (ret < 0) 2283 return ret; 2284 } 2285 2286 mutex_lock(&dev->lock); 2287 if (dev->users) 2288 ret = uvc_status_start(dev, GFP_NOIO); 2289 mutex_unlock(&dev->lock); 2290 2291 return ret; 2292 } 2293 2294 list_for_each_entry(stream, &dev->streams, list) { 2295 if (stream->intf == intf) { 2296 ret = uvc_video_resume(stream, reset); 2297 if (ret < 0) 2298 uvc_queue_streamoff(&stream->queue, 2299 stream->queue.queue.type); 2300 return ret; 2301 } 2302 } 2303 2304 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2305 "mismatch.\n"); 2306 return -EINVAL; 2307 } 2308 2309 static int uvc_resume(struct usb_interface *intf) 2310 { 2311 return __uvc_resume(intf, 0); 2312 } 2313 2314 static int uvc_reset_resume(struct usb_interface *intf) 2315 { 2316 return __uvc_resume(intf, 1); 2317 } 2318 2319 /* ------------------------------------------------------------------------ 2320 * Module parameters 2321 */ 2322 2323 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp) 2324 { 2325 if (uvc_clock_param == CLOCK_MONOTONIC) 2326 return sprintf(buffer, "CLOCK_MONOTONIC"); 2327 else 2328 return sprintf(buffer, "CLOCK_REALTIME"); 2329 } 2330 2331 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp) 2332 { 2333 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2334 val += strlen("clock_"); 2335 2336 if (strcasecmp(val, "monotonic") == 0) 2337 uvc_clock_param = CLOCK_MONOTONIC; 2338 else if (strcasecmp(val, "realtime") == 0) 2339 uvc_clock_param = CLOCK_REALTIME; 2340 else 2341 return -EINVAL; 2342 2343 return 0; 2344 } 2345 2346 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2347 &uvc_clock_param, S_IRUGO|S_IWUSR); 2348 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2349 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR); 2350 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); 2351 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2352 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2353 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2354 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2355 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2356 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2357 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2358 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2359 2360 /* ------------------------------------------------------------------------ 2361 * Driver initialization and cleanup 2362 */ 2363 2364 static const struct uvc_device_info uvc_quirk_probe_minmax = { 2365 .quirks = UVC_QUIRK_PROBE_MINMAX, 2366 }; 2367 2368 static const struct uvc_device_info uvc_quirk_fix_bandwidth = { 2369 .quirks = UVC_QUIRK_FIX_BANDWIDTH, 2370 }; 2371 2372 static const struct uvc_device_info uvc_quirk_probe_def = { 2373 .quirks = UVC_QUIRK_PROBE_DEF, 2374 }; 2375 2376 static const struct uvc_device_info uvc_quirk_stream_no_fid = { 2377 .quirks = UVC_QUIRK_STREAM_NO_FID, 2378 }; 2379 2380 static const struct uvc_device_info uvc_quirk_force_y8 = { 2381 .quirks = UVC_QUIRK_FORCE_Y8, 2382 }; 2383 2384 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q} 2385 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \ 2386 {.meta_format = m} 2387 2388 /* 2389 * The Logitech cameras listed below have their interface class set to 2390 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2391 * though they are compliant. 2392 */ 2393 static const struct usb_device_id uvc_ids[] = { 2394 /* LogiLink Wireless Webcam */ 2395 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2396 | USB_DEVICE_ID_MATCH_INT_INFO, 2397 .idVendor = 0x0416, 2398 .idProduct = 0xa91a, 2399 .bInterfaceClass = USB_CLASS_VIDEO, 2400 .bInterfaceSubClass = 1, 2401 .bInterfaceProtocol = 0, 2402 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2403 /* Genius eFace 2025 */ 2404 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2405 | USB_DEVICE_ID_MATCH_INT_INFO, 2406 .idVendor = 0x0458, 2407 .idProduct = 0x706e, 2408 .bInterfaceClass = USB_CLASS_VIDEO, 2409 .bInterfaceSubClass = 1, 2410 .bInterfaceProtocol = 0, 2411 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2412 /* Microsoft Lifecam NX-6000 */ 2413 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2414 | USB_DEVICE_ID_MATCH_INT_INFO, 2415 .idVendor = 0x045e, 2416 .idProduct = 0x00f8, 2417 .bInterfaceClass = USB_CLASS_VIDEO, 2418 .bInterfaceSubClass = 1, 2419 .bInterfaceProtocol = 0, 2420 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2421 /* Microsoft Lifecam NX-3000 */ 2422 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2423 | USB_DEVICE_ID_MATCH_INT_INFO, 2424 .idVendor = 0x045e, 2425 .idProduct = 0x0721, 2426 .bInterfaceClass = USB_CLASS_VIDEO, 2427 .bInterfaceSubClass = 1, 2428 .bInterfaceProtocol = 0, 2429 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2430 /* Microsoft Lifecam VX-7000 */ 2431 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2432 | USB_DEVICE_ID_MATCH_INT_INFO, 2433 .idVendor = 0x045e, 2434 .idProduct = 0x0723, 2435 .bInterfaceClass = USB_CLASS_VIDEO, 2436 .bInterfaceSubClass = 1, 2437 .bInterfaceProtocol = 0, 2438 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2439 /* Logitech Quickcam Fusion */ 2440 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2441 | USB_DEVICE_ID_MATCH_INT_INFO, 2442 .idVendor = 0x046d, 2443 .idProduct = 0x08c1, 2444 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2445 .bInterfaceSubClass = 1, 2446 .bInterfaceProtocol = 0 }, 2447 /* Logitech Quickcam Orbit MP */ 2448 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2449 | USB_DEVICE_ID_MATCH_INT_INFO, 2450 .idVendor = 0x046d, 2451 .idProduct = 0x08c2, 2452 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2453 .bInterfaceSubClass = 1, 2454 .bInterfaceProtocol = 0 }, 2455 /* Logitech Quickcam Pro for Notebook */ 2456 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2457 | USB_DEVICE_ID_MATCH_INT_INFO, 2458 .idVendor = 0x046d, 2459 .idProduct = 0x08c3, 2460 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2461 .bInterfaceSubClass = 1, 2462 .bInterfaceProtocol = 0 }, 2463 /* Logitech Quickcam Pro 5000 */ 2464 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2465 | USB_DEVICE_ID_MATCH_INT_INFO, 2466 .idVendor = 0x046d, 2467 .idProduct = 0x08c5, 2468 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2469 .bInterfaceSubClass = 1, 2470 .bInterfaceProtocol = 0 }, 2471 /* Logitech Quickcam OEM Dell Notebook */ 2472 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2473 | USB_DEVICE_ID_MATCH_INT_INFO, 2474 .idVendor = 0x046d, 2475 .idProduct = 0x08c6, 2476 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2477 .bInterfaceSubClass = 1, 2478 .bInterfaceProtocol = 0 }, 2479 /* Logitech Quickcam OEM Cisco VT Camera II */ 2480 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2481 | USB_DEVICE_ID_MATCH_INT_INFO, 2482 .idVendor = 0x046d, 2483 .idProduct = 0x08c7, 2484 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2485 .bInterfaceSubClass = 1, 2486 .bInterfaceProtocol = 0 }, 2487 /* Logitech HD Pro Webcam C920 */ 2488 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2489 | USB_DEVICE_ID_MATCH_INT_INFO, 2490 .idVendor = 0x046d, 2491 .idProduct = 0x082d, 2492 .bInterfaceClass = USB_CLASS_VIDEO, 2493 .bInterfaceSubClass = 1, 2494 .bInterfaceProtocol = 0, 2495 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) }, 2496 /* Chicony CNF7129 (Asus EEE 100HE) */ 2497 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2498 | USB_DEVICE_ID_MATCH_INT_INFO, 2499 .idVendor = 0x04f2, 2500 .idProduct = 0xb071, 2501 .bInterfaceClass = USB_CLASS_VIDEO, 2502 .bInterfaceSubClass = 1, 2503 .bInterfaceProtocol = 0, 2504 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) }, 2505 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2506 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2507 | USB_DEVICE_ID_MATCH_INT_INFO, 2508 .idVendor = 0x058f, 2509 .idProduct = 0x3820, 2510 .bInterfaceClass = USB_CLASS_VIDEO, 2511 .bInterfaceSubClass = 1, 2512 .bInterfaceProtocol = 0, 2513 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2514 /* Dell XPS m1530 */ 2515 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2516 | USB_DEVICE_ID_MATCH_INT_INFO, 2517 .idVendor = 0x05a9, 2518 .idProduct = 0x2640, 2519 .bInterfaceClass = USB_CLASS_VIDEO, 2520 .bInterfaceSubClass = 1, 2521 .bInterfaceProtocol = 0, 2522 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2523 /* Dell SP2008WFP Monitor */ 2524 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2525 | USB_DEVICE_ID_MATCH_INT_INFO, 2526 .idVendor = 0x05a9, 2527 .idProduct = 0x2641, 2528 .bInterfaceClass = USB_CLASS_VIDEO, 2529 .bInterfaceSubClass = 1, 2530 .bInterfaceProtocol = 0, 2531 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2532 /* Dell Alienware X51 */ 2533 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2534 | USB_DEVICE_ID_MATCH_INT_INFO, 2535 .idVendor = 0x05a9, 2536 .idProduct = 0x2643, 2537 .bInterfaceClass = USB_CLASS_VIDEO, 2538 .bInterfaceSubClass = 1, 2539 .bInterfaceProtocol = 0, 2540 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2541 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2542 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2543 | USB_DEVICE_ID_MATCH_INT_INFO, 2544 .idVendor = 0x05a9, 2545 .idProduct = 0x264a, 2546 .bInterfaceClass = USB_CLASS_VIDEO, 2547 .bInterfaceSubClass = 1, 2548 .bInterfaceProtocol = 0, 2549 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2550 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2551 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2552 | USB_DEVICE_ID_MATCH_INT_INFO, 2553 .idVendor = 0x05a9, 2554 .idProduct = 0x7670, 2555 .bInterfaceClass = USB_CLASS_VIDEO, 2556 .bInterfaceSubClass = 1, 2557 .bInterfaceProtocol = 0, 2558 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2559 /* Apple Built-In iSight */ 2560 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2561 | USB_DEVICE_ID_MATCH_INT_INFO, 2562 .idVendor = 0x05ac, 2563 .idProduct = 0x8501, 2564 .bInterfaceClass = USB_CLASS_VIDEO, 2565 .bInterfaceSubClass = 1, 2566 .bInterfaceProtocol = 0, 2567 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2568 | UVC_QUIRK_BUILTIN_ISIGHT) }, 2569 /* Apple Built-In iSight via iBridge */ 2570 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2571 | USB_DEVICE_ID_MATCH_INT_INFO, 2572 .idVendor = 0x05ac, 2573 .idProduct = 0x8600, 2574 .bInterfaceClass = USB_CLASS_VIDEO, 2575 .bInterfaceSubClass = 1, 2576 .bInterfaceProtocol = 0, 2577 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2578 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2579 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2580 | USB_DEVICE_ID_MATCH_INT_INFO, 2581 .idVendor = 0x05c8, 2582 .idProduct = 0x0403, 2583 .bInterfaceClass = USB_CLASS_VIDEO, 2584 .bInterfaceSubClass = 1, 2585 .bInterfaceProtocol = 0, 2586 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2587 /* Genesys Logic USB 2.0 PC Camera */ 2588 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2589 | USB_DEVICE_ID_MATCH_INT_INFO, 2590 .idVendor = 0x05e3, 2591 .idProduct = 0x0505, 2592 .bInterfaceClass = USB_CLASS_VIDEO, 2593 .bInterfaceSubClass = 1, 2594 .bInterfaceProtocol = 0, 2595 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2596 /* Hercules Classic Silver */ 2597 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2598 | USB_DEVICE_ID_MATCH_INT_INFO, 2599 .idVendor = 0x06f8, 2600 .idProduct = 0x300c, 2601 .bInterfaceClass = USB_CLASS_VIDEO, 2602 .bInterfaceSubClass = 1, 2603 .bInterfaceProtocol = 0, 2604 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2605 /* ViMicro Vega */ 2606 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2607 | USB_DEVICE_ID_MATCH_INT_INFO, 2608 .idVendor = 0x0ac8, 2609 .idProduct = 0x332d, 2610 .bInterfaceClass = USB_CLASS_VIDEO, 2611 .bInterfaceSubClass = 1, 2612 .bInterfaceProtocol = 0, 2613 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2614 /* ViMicro - Minoru3D */ 2615 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2616 | USB_DEVICE_ID_MATCH_INT_INFO, 2617 .idVendor = 0x0ac8, 2618 .idProduct = 0x3410, 2619 .bInterfaceClass = USB_CLASS_VIDEO, 2620 .bInterfaceSubClass = 1, 2621 .bInterfaceProtocol = 0, 2622 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2623 /* ViMicro Venus - Minoru3D */ 2624 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2625 | USB_DEVICE_ID_MATCH_INT_INFO, 2626 .idVendor = 0x0ac8, 2627 .idProduct = 0x3420, 2628 .bInterfaceClass = USB_CLASS_VIDEO, 2629 .bInterfaceSubClass = 1, 2630 .bInterfaceProtocol = 0, 2631 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2632 /* Ophir Optronics - SPCAM 620U */ 2633 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2634 | USB_DEVICE_ID_MATCH_INT_INFO, 2635 .idVendor = 0x0bd3, 2636 .idProduct = 0x0555, 2637 .bInterfaceClass = USB_CLASS_VIDEO, 2638 .bInterfaceSubClass = 1, 2639 .bInterfaceProtocol = 0, 2640 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2641 /* MT6227 */ 2642 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2643 | USB_DEVICE_ID_MATCH_INT_INFO, 2644 .idVendor = 0x0e8d, 2645 .idProduct = 0x0004, 2646 .bInterfaceClass = USB_CLASS_VIDEO, 2647 .bInterfaceSubClass = 1, 2648 .bInterfaceProtocol = 0, 2649 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2650 | UVC_QUIRK_PROBE_DEF) }, 2651 /* IMC Networks (Medion Akoya) */ 2652 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2653 | USB_DEVICE_ID_MATCH_INT_INFO, 2654 .idVendor = 0x13d3, 2655 .idProduct = 0x5103, 2656 .bInterfaceClass = USB_CLASS_VIDEO, 2657 .bInterfaceSubClass = 1, 2658 .bInterfaceProtocol = 0, 2659 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2660 /* JMicron USB2.0 XGA WebCam */ 2661 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2662 | USB_DEVICE_ID_MATCH_INT_INFO, 2663 .idVendor = 0x152d, 2664 .idProduct = 0x0310, 2665 .bInterfaceClass = USB_CLASS_VIDEO, 2666 .bInterfaceSubClass = 1, 2667 .bInterfaceProtocol = 0, 2668 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2669 /* Syntek (HP Spartan) */ 2670 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2671 | USB_DEVICE_ID_MATCH_INT_INFO, 2672 .idVendor = 0x174f, 2673 .idProduct = 0x5212, 2674 .bInterfaceClass = USB_CLASS_VIDEO, 2675 .bInterfaceSubClass = 1, 2676 .bInterfaceProtocol = 0, 2677 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2678 /* Syntek (Samsung Q310) */ 2679 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2680 | USB_DEVICE_ID_MATCH_INT_INFO, 2681 .idVendor = 0x174f, 2682 .idProduct = 0x5931, 2683 .bInterfaceClass = USB_CLASS_VIDEO, 2684 .bInterfaceSubClass = 1, 2685 .bInterfaceProtocol = 0, 2686 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2687 /* Syntek (Packard Bell EasyNote MX52 */ 2688 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2689 | USB_DEVICE_ID_MATCH_INT_INFO, 2690 .idVendor = 0x174f, 2691 .idProduct = 0x8a12, 2692 .bInterfaceClass = USB_CLASS_VIDEO, 2693 .bInterfaceSubClass = 1, 2694 .bInterfaceProtocol = 0, 2695 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2696 /* Syntek (Asus F9SG) */ 2697 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2698 | USB_DEVICE_ID_MATCH_INT_INFO, 2699 .idVendor = 0x174f, 2700 .idProduct = 0x8a31, 2701 .bInterfaceClass = USB_CLASS_VIDEO, 2702 .bInterfaceSubClass = 1, 2703 .bInterfaceProtocol = 0, 2704 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2705 /* Syntek (Asus U3S) */ 2706 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2707 | USB_DEVICE_ID_MATCH_INT_INFO, 2708 .idVendor = 0x174f, 2709 .idProduct = 0x8a33, 2710 .bInterfaceClass = USB_CLASS_VIDEO, 2711 .bInterfaceSubClass = 1, 2712 .bInterfaceProtocol = 0, 2713 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2714 /* Syntek (JAOtech Smart Terminal) */ 2715 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2716 | USB_DEVICE_ID_MATCH_INT_INFO, 2717 .idVendor = 0x174f, 2718 .idProduct = 0x8a34, 2719 .bInterfaceClass = USB_CLASS_VIDEO, 2720 .bInterfaceSubClass = 1, 2721 .bInterfaceProtocol = 0, 2722 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2723 /* Miricle 307K */ 2724 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2725 | USB_DEVICE_ID_MATCH_INT_INFO, 2726 .idVendor = 0x17dc, 2727 .idProduct = 0x0202, 2728 .bInterfaceClass = USB_CLASS_VIDEO, 2729 .bInterfaceSubClass = 1, 2730 .bInterfaceProtocol = 0, 2731 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2732 /* Lenovo Thinkpad SL400/SL500 */ 2733 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2734 | USB_DEVICE_ID_MATCH_INT_INFO, 2735 .idVendor = 0x17ef, 2736 .idProduct = 0x480b, 2737 .bInterfaceClass = USB_CLASS_VIDEO, 2738 .bInterfaceSubClass = 1, 2739 .bInterfaceProtocol = 0, 2740 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2741 /* Aveo Technology USB 2.0 Camera */ 2742 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2743 | USB_DEVICE_ID_MATCH_INT_INFO, 2744 .idVendor = 0x1871, 2745 .idProduct = 0x0306, 2746 .bInterfaceClass = USB_CLASS_VIDEO, 2747 .bInterfaceSubClass = 1, 2748 .bInterfaceProtocol = 0, 2749 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2750 | UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2751 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */ 2752 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2753 | USB_DEVICE_ID_MATCH_INT_INFO, 2754 .idVendor = 0x1871, 2755 .idProduct = 0x0516, 2756 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2757 .bInterfaceSubClass = 1, 2758 .bInterfaceProtocol = 0 }, 2759 /* Ecamm Pico iMage */ 2760 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2761 | USB_DEVICE_ID_MATCH_INT_INFO, 2762 .idVendor = 0x18cd, 2763 .idProduct = 0xcafe, 2764 .bInterfaceClass = USB_CLASS_VIDEO, 2765 .bInterfaceSubClass = 1, 2766 .bInterfaceProtocol = 0, 2767 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2768 /* Manta MM-353 Plako */ 2769 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2770 | USB_DEVICE_ID_MATCH_INT_INFO, 2771 .idVendor = 0x18ec, 2772 .idProduct = 0x3188, 2773 .bInterfaceClass = USB_CLASS_VIDEO, 2774 .bInterfaceSubClass = 1, 2775 .bInterfaceProtocol = 0, 2776 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2777 /* FSC WebCam V30S */ 2778 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2779 | USB_DEVICE_ID_MATCH_INT_INFO, 2780 .idVendor = 0x18ec, 2781 .idProduct = 0x3288, 2782 .bInterfaceClass = USB_CLASS_VIDEO, 2783 .bInterfaceSubClass = 1, 2784 .bInterfaceProtocol = 0, 2785 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2786 /* Arkmicro unbranded */ 2787 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2788 | USB_DEVICE_ID_MATCH_INT_INFO, 2789 .idVendor = 0x18ec, 2790 .idProduct = 0x3290, 2791 .bInterfaceClass = USB_CLASS_VIDEO, 2792 .bInterfaceSubClass = 1, 2793 .bInterfaceProtocol = 0, 2794 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2795 /* The Imaging Source USB CCD cameras */ 2796 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2797 | USB_DEVICE_ID_MATCH_INT_INFO, 2798 .idVendor = 0x199e, 2799 .idProduct = 0x8102, 2800 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2801 .bInterfaceSubClass = 1, 2802 .bInterfaceProtocol = 0 }, 2803 /* Bodelin ProScopeHR */ 2804 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2805 | USB_DEVICE_ID_MATCH_DEV_HI 2806 | USB_DEVICE_ID_MATCH_INT_INFO, 2807 .idVendor = 0x19ab, 2808 .idProduct = 0x1000, 2809 .bcdDevice_hi = 0x0126, 2810 .bInterfaceClass = USB_CLASS_VIDEO, 2811 .bInterfaceSubClass = 1, 2812 .bInterfaceProtocol = 0, 2813 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) }, 2814 /* MSI StarCam 370i */ 2815 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2816 | USB_DEVICE_ID_MATCH_INT_INFO, 2817 .idVendor = 0x1b3b, 2818 .idProduct = 0x2951, 2819 .bInterfaceClass = USB_CLASS_VIDEO, 2820 .bInterfaceSubClass = 1, 2821 .bInterfaceProtocol = 0, 2822 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2823 /* Generalplus Technology Inc. 808 Camera */ 2824 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2825 | USB_DEVICE_ID_MATCH_INT_INFO, 2826 .idVendor = 0x1b3f, 2827 .idProduct = 0x2002, 2828 .bInterfaceClass = USB_CLASS_VIDEO, 2829 .bInterfaceSubClass = 1, 2830 .bInterfaceProtocol = 0, 2831 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2832 /* SiGma Micro USB Web Camera */ 2833 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2834 | USB_DEVICE_ID_MATCH_INT_INFO, 2835 .idVendor = 0x1c4f, 2836 .idProduct = 0x3000, 2837 .bInterfaceClass = USB_CLASS_VIDEO, 2838 .bInterfaceSubClass = 1, 2839 .bInterfaceProtocol = 0, 2840 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2841 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) }, 2842 /* Oculus VR Positional Tracker DK2 */ 2843 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2844 | USB_DEVICE_ID_MATCH_INT_INFO, 2845 .idVendor = 0x2833, 2846 .idProduct = 0x0201, 2847 .bInterfaceClass = USB_CLASS_VIDEO, 2848 .bInterfaceSubClass = 1, 2849 .bInterfaceProtocol = 0, 2850 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2851 /* Oculus VR Rift Sensor */ 2852 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2853 | USB_DEVICE_ID_MATCH_INT_INFO, 2854 .idVendor = 0x2833, 2855 .idProduct = 0x0211, 2856 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2857 .bInterfaceSubClass = 1, 2858 .bInterfaceProtocol = 0, 2859 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2860 /* Intel RealSense D4M */ 2861 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2862 | USB_DEVICE_ID_MATCH_INT_INFO, 2863 .idVendor = 0x8086, 2864 .idProduct = 0x0b03, 2865 .bInterfaceClass = USB_CLASS_VIDEO, 2866 .bInterfaceSubClass = 1, 2867 .bInterfaceProtocol = 0, 2868 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) }, 2869 /* Generic USB Video Class */ 2870 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) }, 2871 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) }, 2872 {} 2873 }; 2874 2875 MODULE_DEVICE_TABLE(usb, uvc_ids); 2876 2877 struct uvc_driver uvc_driver = { 2878 .driver = { 2879 .name = "uvcvideo", 2880 .probe = uvc_probe, 2881 .disconnect = uvc_disconnect, 2882 .suspend = uvc_suspend, 2883 .resume = uvc_resume, 2884 .reset_resume = uvc_reset_resume, 2885 .id_table = uvc_ids, 2886 .supports_autosuspend = 1, 2887 }, 2888 }; 2889 2890 static int __init uvc_init(void) 2891 { 2892 int ret; 2893 2894 uvc_debugfs_init(); 2895 2896 ret = usb_register(&uvc_driver.driver); 2897 if (ret < 0) { 2898 uvc_debugfs_cleanup(); 2899 return ret; 2900 } 2901 2902 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 2903 return 0; 2904 } 2905 2906 static void __exit uvc_cleanup(void) 2907 { 2908 usb_deregister(&uvc_driver.driver); 2909 uvc_debugfs_cleanup(); 2910 } 2911 2912 module_init(uvc_init); 2913 module_exit(uvc_cleanup); 2914 2915 MODULE_AUTHOR(DRIVER_AUTHOR); 2916 MODULE_DESCRIPTION(DRIVER_DESC); 2917 MODULE_LICENSE("GPL"); 2918 MODULE_VERSION(DRIVER_VERSION); 2919 2920