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 .name = "HEVC", 219 .guid = UVC_GUID_FORMAT_HEVC, 220 .fcc = V4L2_PIX_FMT_HEVC, 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 enum v4l2_colorspace uvc_colorspace(const u8 primaries) 257 { 258 static const enum v4l2_colorspace colorprimaries[] = { 259 V4L2_COLORSPACE_DEFAULT, /* Unspecified */ 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 V4L2_COLORSPACE_DEFAULT; /* Reserved */ 271 } 272 273 static enum v4l2_xfer_func uvc_xfer_func(const u8 transfer_characteristics) 274 { 275 /* 276 * V4L2 does not currently have definitions for all possible values of 277 * UVC transfer characteristics. If v4l2_xfer_func is extended with new 278 * values, the mapping below should be updated. 279 * 280 * Substitutions are taken from the mapping given for 281 * V4L2_XFER_FUNC_DEFAULT documented in videodev2.h. 282 */ 283 static const enum v4l2_xfer_func xfer_funcs[] = { 284 V4L2_XFER_FUNC_DEFAULT, /* Unspecified */ 285 V4L2_XFER_FUNC_709, 286 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 M */ 287 V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 B, G */ 288 V4L2_XFER_FUNC_709, /* Substitution for SMPTE 170M */ 289 V4L2_XFER_FUNC_SMPTE240M, 290 V4L2_XFER_FUNC_NONE, 291 V4L2_XFER_FUNC_SRGB, 292 }; 293 294 if (transfer_characteristics < ARRAY_SIZE(xfer_funcs)) 295 return xfer_funcs[transfer_characteristics]; 296 297 return V4L2_XFER_FUNC_DEFAULT; /* Reserved */ 298 } 299 300 static enum v4l2_ycbcr_encoding uvc_ycbcr_enc(const u8 matrix_coefficients) 301 { 302 /* 303 * V4L2 does not currently have definitions for all possible values of 304 * UVC matrix coefficients. If v4l2_ycbcr_encoding is extended with new 305 * values, the mapping below should be updated. 306 * 307 * Substitutions are taken from the mapping given for 308 * V4L2_YCBCR_ENC_DEFAULT documented in videodev2.h. 309 * 310 * FCC is assumed to be close enough to 601. 311 */ 312 static const enum v4l2_ycbcr_encoding ycbcr_encs[] = { 313 V4L2_YCBCR_ENC_DEFAULT, /* Unspecified */ 314 V4L2_YCBCR_ENC_709, 315 V4L2_YCBCR_ENC_601, /* Substitution for FCC */ 316 V4L2_YCBCR_ENC_601, /* Substitution for BT.470-2 B, G */ 317 V4L2_YCBCR_ENC_601, 318 V4L2_YCBCR_ENC_SMPTE240M, 319 }; 320 321 if (matrix_coefficients < ARRAY_SIZE(ycbcr_encs)) 322 return ycbcr_encs[matrix_coefficients]; 323 324 return V4L2_YCBCR_ENC_DEFAULT; /* Reserved */ 325 } 326 327 /* Simplify a fraction using a simple continued fraction decomposition. The 328 * idea here is to convert fractions such as 333333/10000000 to 1/30 using 329 * 32 bit arithmetic only. The algorithm is not perfect and relies upon two 330 * arbitrary parameters to remove non-significative terms from the simple 331 * continued fraction decomposition. Using 8 and 333 for n_terms and threshold 332 * respectively seems to give nice results. 333 */ 334 void uvc_simplify_fraction(u32 *numerator, u32 *denominator, 335 unsigned int n_terms, unsigned int threshold) 336 { 337 u32 *an; 338 u32 x, y, r; 339 unsigned int i, n; 340 341 an = kmalloc_array(n_terms, sizeof(*an), GFP_KERNEL); 342 if (an == NULL) 343 return; 344 345 /* Convert the fraction to a simple continued fraction. See 346 * https://mathforum.org/dr.math/faq/faq.fractions.html 347 * Stop if the current term is bigger than or equal to the given 348 * threshold. 349 */ 350 x = *numerator; 351 y = *denominator; 352 353 for (n = 0; n < n_terms && y != 0; ++n) { 354 an[n] = x / y; 355 if (an[n] >= threshold) { 356 if (n < 2) 357 n++; 358 break; 359 } 360 361 r = x - an[n] * y; 362 x = y; 363 y = r; 364 } 365 366 /* Expand the simple continued fraction back to an integer fraction. */ 367 x = 0; 368 y = 1; 369 370 for (i = n; i > 0; --i) { 371 r = y; 372 y = an[i-1] * y + x; 373 x = r; 374 } 375 376 *numerator = y; 377 *denominator = x; 378 kfree(an); 379 } 380 381 /* Convert a fraction to a frame interval in 100ns multiples. The idea here is 382 * to compute numerator / denominator * 10000000 using 32 bit fixed point 383 * arithmetic only. 384 */ 385 u32 uvc_fraction_to_interval(u32 numerator, u32 denominator) 386 { 387 u32 multiplier; 388 389 /* Saturate the result if the operation would overflow. */ 390 if (denominator == 0 || 391 numerator/denominator >= ((u32)-1)/10000000) 392 return (u32)-1; 393 394 /* Divide both the denominator and the multiplier by two until 395 * numerator * multiplier doesn't overflow. If anyone knows a better 396 * algorithm please let me know. 397 */ 398 multiplier = 10000000; 399 while (numerator > ((u32)-1)/multiplier) { 400 multiplier /= 2; 401 denominator /= 2; 402 } 403 404 return denominator ? numerator * multiplier / denominator : 0; 405 } 406 407 /* ------------------------------------------------------------------------ 408 * Terminal and unit management 409 */ 410 411 struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) 412 { 413 struct uvc_entity *entity; 414 415 list_for_each_entry(entity, &dev->entities, list) { 416 if (entity->id == id) 417 return entity; 418 } 419 420 return NULL; 421 } 422 423 static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, 424 int id, struct uvc_entity *entity) 425 { 426 unsigned int i; 427 428 if (entity == NULL) 429 entity = list_entry(&dev->entities, struct uvc_entity, list); 430 431 list_for_each_entry_continue(entity, &dev->entities, list) { 432 for (i = 0; i < entity->bNrInPins; ++i) 433 if (entity->baSourceID[i] == id) 434 return entity; 435 } 436 437 return NULL; 438 } 439 440 static struct uvc_streaming *uvc_stream_by_id(struct uvc_device *dev, int id) 441 { 442 struct uvc_streaming *stream; 443 444 list_for_each_entry(stream, &dev->streams, list) { 445 if (stream->header.bTerminalLink == id) 446 return stream; 447 } 448 449 return NULL; 450 } 451 452 /* ------------------------------------------------------------------------ 453 * Streaming Object Management 454 */ 455 456 static void uvc_stream_delete(struct uvc_streaming *stream) 457 { 458 if (stream->async_wq) 459 destroy_workqueue(stream->async_wq); 460 461 mutex_destroy(&stream->mutex); 462 463 usb_put_intf(stream->intf); 464 465 kfree(stream->format); 466 kfree(stream->header.bmaControls); 467 kfree(stream); 468 } 469 470 static struct uvc_streaming *uvc_stream_new(struct uvc_device *dev, 471 struct usb_interface *intf) 472 { 473 struct uvc_streaming *stream; 474 475 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 476 if (stream == NULL) 477 return NULL; 478 479 mutex_init(&stream->mutex); 480 481 stream->dev = dev; 482 stream->intf = usb_get_intf(intf); 483 stream->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 484 485 /* Allocate a stream specific work queue for asynchronous tasks. */ 486 stream->async_wq = alloc_workqueue("uvcvideo", WQ_UNBOUND | WQ_HIGHPRI, 487 0); 488 if (!stream->async_wq) { 489 uvc_stream_delete(stream); 490 return NULL; 491 } 492 493 return stream; 494 } 495 496 /* ------------------------------------------------------------------------ 497 * Descriptors parsing 498 */ 499 500 static int uvc_parse_format(struct uvc_device *dev, 501 struct uvc_streaming *streaming, struct uvc_format *format, 502 u32 **intervals, unsigned char *buffer, int buflen) 503 { 504 struct usb_interface *intf = streaming->intf; 505 struct usb_host_interface *alts = intf->cur_altsetting; 506 struct uvc_format_desc *fmtdesc; 507 struct uvc_frame *frame; 508 const unsigned char *start = buffer; 509 unsigned int width_multiplier = 1; 510 unsigned int interval; 511 unsigned int i, n; 512 u8 ftype; 513 514 format->type = buffer[2]; 515 format->index = buffer[3]; 516 517 switch (buffer[2]) { 518 case UVC_VS_FORMAT_UNCOMPRESSED: 519 case UVC_VS_FORMAT_FRAME_BASED: 520 n = buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED ? 27 : 28; 521 if (buflen < n) { 522 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 523 "interface %d FORMAT error\n", 524 dev->udev->devnum, 525 alts->desc.bInterfaceNumber); 526 return -EINVAL; 527 } 528 529 /* Find the format descriptor from its GUID. */ 530 fmtdesc = uvc_format_by_guid(&buffer[5]); 531 532 if (fmtdesc != NULL) { 533 strscpy(format->name, fmtdesc->name, 534 sizeof(format->name)); 535 format->fcc = fmtdesc->fcc; 536 } else { 537 uvc_printk(KERN_INFO, "Unknown video format %pUl\n", 538 &buffer[5]); 539 snprintf(format->name, sizeof(format->name), "%pUl\n", 540 &buffer[5]); 541 format->fcc = 0; 542 } 543 544 format->bpp = buffer[21]; 545 546 /* Some devices report a format that doesn't match what they 547 * really send. 548 */ 549 if (dev->quirks & UVC_QUIRK_FORCE_Y8) { 550 if (format->fcc == V4L2_PIX_FMT_YUYV) { 551 strscpy(format->name, "Greyscale 8-bit (Y8 )", 552 sizeof(format->name)); 553 format->fcc = V4L2_PIX_FMT_GREY; 554 format->bpp = 8; 555 width_multiplier = 2; 556 } 557 } 558 559 /* Some devices report bpp that doesn't match the format. */ 560 if (dev->quirks & UVC_QUIRK_FORCE_BPP) { 561 const struct v4l2_format_info *info = 562 v4l2_format_info(format->fcc); 563 564 if (info) { 565 unsigned int div = info->hdiv * info->vdiv; 566 567 n = info->bpp[0] * div; 568 for (i = 1; i < info->comp_planes; i++) 569 n += info->bpp[i]; 570 571 format->bpp = DIV_ROUND_UP(8 * n, div); 572 } 573 } 574 575 if (buffer[2] == UVC_VS_FORMAT_UNCOMPRESSED) { 576 ftype = UVC_VS_FRAME_UNCOMPRESSED; 577 } else { 578 ftype = UVC_VS_FRAME_FRAME_BASED; 579 if (buffer[27]) 580 format->flags = UVC_FMT_FLAG_COMPRESSED; 581 } 582 break; 583 584 case UVC_VS_FORMAT_MJPEG: 585 if (buflen < 11) { 586 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 587 "interface %d FORMAT error\n", 588 dev->udev->devnum, 589 alts->desc.bInterfaceNumber); 590 return -EINVAL; 591 } 592 593 strscpy(format->name, "MJPEG", sizeof(format->name)); 594 format->fcc = V4L2_PIX_FMT_MJPEG; 595 format->flags = UVC_FMT_FLAG_COMPRESSED; 596 format->bpp = 0; 597 ftype = UVC_VS_FRAME_MJPEG; 598 break; 599 600 case UVC_VS_FORMAT_DV: 601 if (buflen < 9) { 602 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 603 "interface %d FORMAT error\n", 604 dev->udev->devnum, 605 alts->desc.bInterfaceNumber); 606 return -EINVAL; 607 } 608 609 switch (buffer[8] & 0x7f) { 610 case 0: 611 strscpy(format->name, "SD-DV", sizeof(format->name)); 612 break; 613 case 1: 614 strscpy(format->name, "SDL-DV", sizeof(format->name)); 615 break; 616 case 2: 617 strscpy(format->name, "HD-DV", sizeof(format->name)); 618 break; 619 default: 620 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 621 "interface %d: unknown DV format %u\n", 622 dev->udev->devnum, 623 alts->desc.bInterfaceNumber, buffer[8]); 624 return -EINVAL; 625 } 626 627 strlcat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", 628 sizeof(format->name)); 629 630 format->fcc = V4L2_PIX_FMT_DV; 631 format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; 632 format->bpp = 0; 633 ftype = 0; 634 635 /* Create a dummy frame descriptor. */ 636 frame = &format->frame[0]; 637 memset(&format->frame[0], 0, sizeof(format->frame[0])); 638 frame->bFrameIntervalType = 1; 639 frame->dwDefaultFrameInterval = 1; 640 frame->dwFrameInterval = *intervals; 641 *(*intervals)++ = 1; 642 format->nframes = 1; 643 break; 644 645 case UVC_VS_FORMAT_MPEG2TS: 646 case UVC_VS_FORMAT_STREAM_BASED: 647 /* Not supported yet. */ 648 default: 649 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 650 "interface %d unsupported format %u\n", 651 dev->udev->devnum, alts->desc.bInterfaceNumber, 652 buffer[2]); 653 return -EINVAL; 654 } 655 656 uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); 657 658 buflen -= buffer[0]; 659 buffer += buffer[0]; 660 661 /* Parse the frame descriptors. Only uncompressed, MJPEG and frame 662 * based formats have frame descriptors. 663 */ 664 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 665 buffer[2] == ftype) { 666 frame = &format->frame[format->nframes]; 667 if (ftype != UVC_VS_FRAME_FRAME_BASED) 668 n = buflen > 25 ? buffer[25] : 0; 669 else 670 n = buflen > 21 ? buffer[21] : 0; 671 672 n = n ? n : 3; 673 674 if (buflen < 26 + 4*n) { 675 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 676 "interface %d FRAME error\n", dev->udev->devnum, 677 alts->desc.bInterfaceNumber); 678 return -EINVAL; 679 } 680 681 frame->bFrameIndex = buffer[3]; 682 frame->bmCapabilities = buffer[4]; 683 frame->wWidth = get_unaligned_le16(&buffer[5]) 684 * width_multiplier; 685 frame->wHeight = get_unaligned_le16(&buffer[7]); 686 frame->dwMinBitRate = get_unaligned_le32(&buffer[9]); 687 frame->dwMaxBitRate = get_unaligned_le32(&buffer[13]); 688 if (ftype != UVC_VS_FRAME_FRAME_BASED) { 689 frame->dwMaxVideoFrameBufferSize = 690 get_unaligned_le32(&buffer[17]); 691 frame->dwDefaultFrameInterval = 692 get_unaligned_le32(&buffer[21]); 693 frame->bFrameIntervalType = buffer[25]; 694 } else { 695 frame->dwMaxVideoFrameBufferSize = 0; 696 frame->dwDefaultFrameInterval = 697 get_unaligned_le32(&buffer[17]); 698 frame->bFrameIntervalType = buffer[21]; 699 } 700 frame->dwFrameInterval = *intervals; 701 702 /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize 703 * completely. Observed behaviours range from setting the 704 * value to 1.1x the actual frame size to hardwiring the 705 * 16 low bits to 0. This results in a higher than necessary 706 * memory usage as well as a wrong image size information. For 707 * uncompressed formats this can be fixed by computing the 708 * value from the frame size. 709 */ 710 if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) 711 frame->dwMaxVideoFrameBufferSize = format->bpp 712 * frame->wWidth * frame->wHeight / 8; 713 714 /* Some bogus devices report dwMinFrameInterval equal to 715 * dwMaxFrameInterval and have dwFrameIntervalStep set to 716 * zero. Setting all null intervals to 1 fixes the problem and 717 * some other divisions by zero that could happen. 718 */ 719 for (i = 0; i < n; ++i) { 720 interval = get_unaligned_le32(&buffer[26+4*i]); 721 *(*intervals)++ = interval ? interval : 1; 722 } 723 724 /* Make sure that the default frame interval stays between 725 * the boundaries. 726 */ 727 n -= frame->bFrameIntervalType ? 1 : 2; 728 frame->dwDefaultFrameInterval = 729 min(frame->dwFrameInterval[n], 730 max(frame->dwFrameInterval[0], 731 frame->dwDefaultFrameInterval)); 732 733 if (dev->quirks & UVC_QUIRK_RESTRICT_FRAME_RATE) { 734 frame->bFrameIntervalType = 1; 735 frame->dwFrameInterval[0] = 736 frame->dwDefaultFrameInterval; 737 } 738 739 uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", 740 frame->wWidth, frame->wHeight, 741 10000000/frame->dwDefaultFrameInterval, 742 (100000000/frame->dwDefaultFrameInterval)%10); 743 744 format->nframes++; 745 buflen -= buffer[0]; 746 buffer += buffer[0]; 747 } 748 749 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 750 buffer[2] == UVC_VS_STILL_IMAGE_FRAME) { 751 buflen -= buffer[0]; 752 buffer += buffer[0]; 753 } 754 755 if (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE && 756 buffer[2] == UVC_VS_COLORFORMAT) { 757 if (buflen < 6) { 758 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 759 "interface %d COLORFORMAT error\n", 760 dev->udev->devnum, 761 alts->desc.bInterfaceNumber); 762 return -EINVAL; 763 } 764 765 format->colorspace = uvc_colorspace(buffer[3]); 766 format->xfer_func = uvc_xfer_func(buffer[4]); 767 format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]); 768 769 buflen -= buffer[0]; 770 buffer += buffer[0]; 771 } 772 773 return buffer - start; 774 } 775 776 static int uvc_parse_streaming(struct uvc_device *dev, 777 struct usb_interface *intf) 778 { 779 struct uvc_streaming *streaming = NULL; 780 struct uvc_format *format; 781 struct uvc_frame *frame; 782 struct usb_host_interface *alts = &intf->altsetting[0]; 783 unsigned char *_buffer, *buffer = alts->extra; 784 int _buflen, buflen = alts->extralen; 785 unsigned int nformats = 0, nframes = 0, nintervals = 0; 786 unsigned int size, i, n, p; 787 u32 *interval; 788 u16 psize; 789 int ret = -EINVAL; 790 791 if (intf->cur_altsetting->desc.bInterfaceSubClass 792 != UVC_SC_VIDEOSTREAMING) { 793 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " 794 "video streaming interface\n", dev->udev->devnum, 795 intf->altsetting[0].desc.bInterfaceNumber); 796 return -EINVAL; 797 } 798 799 if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { 800 uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " 801 "claimed\n", dev->udev->devnum, 802 intf->altsetting[0].desc.bInterfaceNumber); 803 return -EINVAL; 804 } 805 806 streaming = uvc_stream_new(dev, intf); 807 if (streaming == NULL) { 808 usb_driver_release_interface(&uvc_driver.driver, intf); 809 return -ENOMEM; 810 } 811 812 /* The Pico iMage webcam has its class-specific interface descriptors 813 * after the endpoint descriptors. 814 */ 815 if (buflen == 0) { 816 for (i = 0; i < alts->desc.bNumEndpoints; ++i) { 817 struct usb_host_endpoint *ep = &alts->endpoint[i]; 818 819 if (ep->extralen == 0) 820 continue; 821 822 if (ep->extralen > 2 && 823 ep->extra[1] == USB_DT_CS_INTERFACE) { 824 uvc_trace(UVC_TRACE_DESCR, "trying extra data " 825 "from endpoint %u.\n", i); 826 buffer = alts->endpoint[i].extra; 827 buflen = alts->endpoint[i].extralen; 828 break; 829 } 830 } 831 } 832 833 /* Skip the standard interface descriptors. */ 834 while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { 835 buflen -= buffer[0]; 836 buffer += buffer[0]; 837 } 838 839 if (buflen <= 2) { 840 uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " 841 "interface descriptors found.\n"); 842 goto error; 843 } 844 845 /* Parse the header descriptor. */ 846 switch (buffer[2]) { 847 case UVC_VS_OUTPUT_HEADER: 848 streaming->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 849 size = 9; 850 break; 851 852 case UVC_VS_INPUT_HEADER: 853 streaming->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 854 size = 13; 855 break; 856 857 default: 858 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 859 "%d HEADER descriptor not found.\n", dev->udev->devnum, 860 alts->desc.bInterfaceNumber); 861 goto error; 862 } 863 864 p = buflen >= 4 ? buffer[3] : 0; 865 n = buflen >= size ? buffer[size-1] : 0; 866 867 if (buflen < size + p*n) { 868 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 869 "interface %d HEADER descriptor is invalid.\n", 870 dev->udev->devnum, alts->desc.bInterfaceNumber); 871 goto error; 872 } 873 874 streaming->header.bNumFormats = p; 875 streaming->header.bEndpointAddress = buffer[6]; 876 if (buffer[2] == UVC_VS_INPUT_HEADER) { 877 streaming->header.bmInfo = buffer[7]; 878 streaming->header.bTerminalLink = buffer[8]; 879 streaming->header.bStillCaptureMethod = buffer[9]; 880 streaming->header.bTriggerSupport = buffer[10]; 881 streaming->header.bTriggerUsage = buffer[11]; 882 } else { 883 streaming->header.bTerminalLink = buffer[7]; 884 } 885 streaming->header.bControlSize = n; 886 887 streaming->header.bmaControls = kmemdup(&buffer[size], p * n, 888 GFP_KERNEL); 889 if (streaming->header.bmaControls == NULL) { 890 ret = -ENOMEM; 891 goto error; 892 } 893 894 buflen -= buffer[0]; 895 buffer += buffer[0]; 896 897 _buffer = buffer; 898 _buflen = buflen; 899 900 /* Count the format and frame descriptors. */ 901 while (_buflen > 2 && _buffer[1] == USB_DT_CS_INTERFACE) { 902 switch (_buffer[2]) { 903 case UVC_VS_FORMAT_UNCOMPRESSED: 904 case UVC_VS_FORMAT_MJPEG: 905 case UVC_VS_FORMAT_FRAME_BASED: 906 nformats++; 907 break; 908 909 case UVC_VS_FORMAT_DV: 910 /* DV format has no frame descriptor. We will create a 911 * dummy frame descriptor with a dummy frame interval. 912 */ 913 nformats++; 914 nframes++; 915 nintervals++; 916 break; 917 918 case UVC_VS_FORMAT_MPEG2TS: 919 case UVC_VS_FORMAT_STREAM_BASED: 920 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " 921 "interface %d FORMAT %u is not supported.\n", 922 dev->udev->devnum, 923 alts->desc.bInterfaceNumber, _buffer[2]); 924 break; 925 926 case UVC_VS_FRAME_UNCOMPRESSED: 927 case UVC_VS_FRAME_MJPEG: 928 nframes++; 929 if (_buflen > 25) 930 nintervals += _buffer[25] ? _buffer[25] : 3; 931 break; 932 933 case UVC_VS_FRAME_FRAME_BASED: 934 nframes++; 935 if (_buflen > 21) 936 nintervals += _buffer[21] ? _buffer[21] : 3; 937 break; 938 } 939 940 _buflen -= _buffer[0]; 941 _buffer += _buffer[0]; 942 } 943 944 if (nformats == 0) { 945 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 946 "%d has no supported formats defined.\n", 947 dev->udev->devnum, alts->desc.bInterfaceNumber); 948 goto error; 949 } 950 951 size = nformats * sizeof(*format) + nframes * sizeof(*frame) 952 + nintervals * sizeof(*interval); 953 format = kzalloc(size, GFP_KERNEL); 954 if (format == NULL) { 955 ret = -ENOMEM; 956 goto error; 957 } 958 959 frame = (struct uvc_frame *)&format[nformats]; 960 interval = (u32 *)&frame[nframes]; 961 962 streaming->format = format; 963 streaming->nformats = nformats; 964 965 /* Parse the format descriptors. */ 966 while (buflen > 2 && buffer[1] == USB_DT_CS_INTERFACE) { 967 switch (buffer[2]) { 968 case UVC_VS_FORMAT_UNCOMPRESSED: 969 case UVC_VS_FORMAT_MJPEG: 970 case UVC_VS_FORMAT_DV: 971 case UVC_VS_FORMAT_FRAME_BASED: 972 format->frame = frame; 973 ret = uvc_parse_format(dev, streaming, format, 974 &interval, buffer, buflen); 975 if (ret < 0) 976 goto error; 977 978 frame += format->nframes; 979 format++; 980 981 buflen -= ret; 982 buffer += ret; 983 continue; 984 985 default: 986 break; 987 } 988 989 buflen -= buffer[0]; 990 buffer += buffer[0]; 991 } 992 993 if (buflen) 994 uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " 995 "%d has %u bytes of trailing descriptor garbage.\n", 996 dev->udev->devnum, alts->desc.bInterfaceNumber, buflen); 997 998 /* Parse the alternate settings to find the maximum bandwidth. */ 999 for (i = 0; i < intf->num_altsetting; ++i) { 1000 struct usb_host_endpoint *ep; 1001 alts = &intf->altsetting[i]; 1002 ep = uvc_find_endpoint(alts, 1003 streaming->header.bEndpointAddress); 1004 if (ep == NULL) 1005 continue; 1006 1007 psize = le16_to_cpu(ep->desc.wMaxPacketSize); 1008 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); 1009 if (psize > streaming->maxpsize) 1010 streaming->maxpsize = psize; 1011 } 1012 1013 list_add_tail(&streaming->list, &dev->streams); 1014 return 0; 1015 1016 error: 1017 usb_driver_release_interface(&uvc_driver.driver, intf); 1018 uvc_stream_delete(streaming); 1019 return ret; 1020 } 1021 1022 static struct uvc_entity *uvc_alloc_entity(u16 type, u8 id, 1023 unsigned int num_pads, unsigned int extra_size) 1024 { 1025 struct uvc_entity *entity; 1026 unsigned int num_inputs; 1027 unsigned int size; 1028 unsigned int i; 1029 1030 extra_size = roundup(extra_size, sizeof(*entity->pads)); 1031 num_inputs = (type & UVC_TERM_OUTPUT) ? num_pads : num_pads - 1; 1032 size = sizeof(*entity) + extra_size + sizeof(*entity->pads) * num_pads 1033 + num_inputs; 1034 entity = kzalloc(size, GFP_KERNEL); 1035 if (entity == NULL) 1036 return NULL; 1037 1038 entity->id = id; 1039 entity->type = type; 1040 1041 entity->num_links = 0; 1042 entity->num_pads = num_pads; 1043 entity->pads = ((void *)(entity + 1)) + extra_size; 1044 1045 for (i = 0; i < num_inputs; ++i) 1046 entity->pads[i].flags = MEDIA_PAD_FL_SINK; 1047 if (!UVC_ENTITY_IS_OTERM(entity)) 1048 entity->pads[num_pads-1].flags = MEDIA_PAD_FL_SOURCE; 1049 1050 entity->bNrInPins = num_inputs; 1051 entity->baSourceID = (u8 *)(&entity->pads[num_pads]); 1052 1053 return entity; 1054 } 1055 1056 /* Parse vendor-specific extensions. */ 1057 static int uvc_parse_vendor_control(struct uvc_device *dev, 1058 const unsigned char *buffer, int buflen) 1059 { 1060 struct usb_device *udev = dev->udev; 1061 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1062 struct uvc_entity *unit; 1063 unsigned int n, p; 1064 int handled = 0; 1065 1066 switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { 1067 case 0x046d: /* Logitech */ 1068 if (buffer[1] != 0x41 || buffer[2] != 0x01) 1069 break; 1070 1071 /* Logitech implements several vendor specific functions 1072 * through vendor specific extension units (LXU). 1073 * 1074 * The LXU descriptors are similar to XU descriptors 1075 * (see "USB Device Video Class for Video Devices", section 1076 * 3.7.2.6 "Extension Unit Descriptor") with the following 1077 * differences: 1078 * 1079 * ---------------------------------------------------------- 1080 * 0 bLength 1 Number 1081 * Size of this descriptor, in bytes: 24+p+n*2 1082 * ---------------------------------------------------------- 1083 * 23+p+n bmControlsType N Bitmap 1084 * Individual bits in the set are defined: 1085 * 0: Absolute 1086 * 1: Relative 1087 * 1088 * This bitset is mapped exactly the same as bmControls. 1089 * ---------------------------------------------------------- 1090 * 23+p+n*2 bReserved 1 Boolean 1091 * ---------------------------------------------------------- 1092 * 24+p+n*2 iExtension 1 Index 1093 * Index of a string descriptor that describes this 1094 * extension unit. 1095 * ---------------------------------------------------------- 1096 */ 1097 p = buflen >= 22 ? buffer[21] : 0; 1098 n = buflen >= 25 + p ? buffer[22+p] : 0; 1099 1100 if (buflen < 25 + p + 2*n) { 1101 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1102 "interface %d EXTENSION_UNIT error\n", 1103 udev->devnum, alts->desc.bInterfaceNumber); 1104 break; 1105 } 1106 1107 unit = uvc_alloc_entity(UVC_VC_EXTENSION_UNIT, buffer[3], 1108 p + 1, 2*n); 1109 if (unit == NULL) 1110 return -ENOMEM; 1111 1112 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1113 unit->extension.bNumControls = buffer[20]; 1114 memcpy(unit->baSourceID, &buffer[22], p); 1115 unit->extension.bControlSize = buffer[22+p]; 1116 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1117 unit->extension.bmControlsType = (u8 *)unit + sizeof(*unit) 1118 + n; 1119 memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); 1120 1121 if (buffer[24+p+2*n] != 0) 1122 usb_string(udev, buffer[24+p+2*n], unit->name, 1123 sizeof(unit->name)); 1124 else 1125 sprintf(unit->name, "Extension %u", buffer[3]); 1126 1127 list_add_tail(&unit->list, &dev->entities); 1128 handled = 1; 1129 break; 1130 } 1131 1132 return handled; 1133 } 1134 1135 static int uvc_parse_standard_control(struct uvc_device *dev, 1136 const unsigned char *buffer, int buflen) 1137 { 1138 struct usb_device *udev = dev->udev; 1139 struct uvc_entity *unit, *term; 1140 struct usb_interface *intf; 1141 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1142 unsigned int i, n, p, len; 1143 u16 type; 1144 1145 switch (buffer[2]) { 1146 case UVC_VC_HEADER: 1147 n = buflen >= 12 ? buffer[11] : 0; 1148 1149 if (buflen < 12 + n) { 1150 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1151 "interface %d HEADER error\n", udev->devnum, 1152 alts->desc.bInterfaceNumber); 1153 return -EINVAL; 1154 } 1155 1156 dev->uvc_version = get_unaligned_le16(&buffer[3]); 1157 dev->clock_frequency = get_unaligned_le32(&buffer[7]); 1158 1159 /* Parse all USB Video Streaming interfaces. */ 1160 for (i = 0; i < n; ++i) { 1161 intf = usb_ifnum_to_if(udev, buffer[12+i]); 1162 if (intf == NULL) { 1163 uvc_trace(UVC_TRACE_DESCR, "device %d " 1164 "interface %d doesn't exists\n", 1165 udev->devnum, i); 1166 continue; 1167 } 1168 1169 uvc_parse_streaming(dev, intf); 1170 } 1171 break; 1172 1173 case UVC_VC_INPUT_TERMINAL: 1174 if (buflen < 8) { 1175 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1176 "interface %d INPUT_TERMINAL error\n", 1177 udev->devnum, alts->desc.bInterfaceNumber); 1178 return -EINVAL; 1179 } 1180 1181 /* 1182 * Reject invalid terminal types that would cause issues: 1183 * 1184 * - The high byte must be non-zero, otherwise it would be 1185 * confused with a unit. 1186 * 1187 * - Bit 15 must be 0, as we use it internally as a terminal 1188 * direction flag. 1189 * 1190 * Other unknown types are accepted. 1191 */ 1192 type = get_unaligned_le16(&buffer[4]); 1193 if ((type & 0x7f00) == 0 || (type & 0x8000) != 0) { 1194 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1195 "interface %d INPUT_TERMINAL %d has invalid " 1196 "type 0x%04x, skipping\n", udev->devnum, 1197 alts->desc.bInterfaceNumber, 1198 buffer[3], type); 1199 return 0; 1200 } 1201 1202 n = 0; 1203 p = 0; 1204 len = 8; 1205 1206 if (type == UVC_ITT_CAMERA) { 1207 n = buflen >= 15 ? buffer[14] : 0; 1208 len = 15; 1209 1210 } else if (type == UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1211 n = buflen >= 9 ? buffer[8] : 0; 1212 p = buflen >= 10 + n ? buffer[9+n] : 0; 1213 len = 10; 1214 } 1215 1216 if (buflen < len + n + p) { 1217 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1218 "interface %d INPUT_TERMINAL error\n", 1219 udev->devnum, alts->desc.bInterfaceNumber); 1220 return -EINVAL; 1221 } 1222 1223 term = uvc_alloc_entity(type | UVC_TERM_INPUT, buffer[3], 1224 1, n + p); 1225 if (term == NULL) 1226 return -ENOMEM; 1227 1228 if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) { 1229 term->camera.bControlSize = n; 1230 term->camera.bmControls = (u8 *)term + sizeof(*term); 1231 term->camera.wObjectiveFocalLengthMin = 1232 get_unaligned_le16(&buffer[8]); 1233 term->camera.wObjectiveFocalLengthMax = 1234 get_unaligned_le16(&buffer[10]); 1235 term->camera.wOcularFocalLength = 1236 get_unaligned_le16(&buffer[12]); 1237 memcpy(term->camera.bmControls, &buffer[15], n); 1238 } else if (UVC_ENTITY_TYPE(term) == 1239 UVC_ITT_MEDIA_TRANSPORT_INPUT) { 1240 term->media.bControlSize = n; 1241 term->media.bmControls = (u8 *)term + sizeof(*term); 1242 term->media.bTransportModeSize = p; 1243 term->media.bmTransportModes = (u8 *)term 1244 + sizeof(*term) + n; 1245 memcpy(term->media.bmControls, &buffer[9], n); 1246 memcpy(term->media.bmTransportModes, &buffer[10+n], p); 1247 } 1248 1249 if (buffer[7] != 0) 1250 usb_string(udev, buffer[7], term->name, 1251 sizeof(term->name)); 1252 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_CAMERA) 1253 sprintf(term->name, "Camera %u", buffer[3]); 1254 else if (UVC_ENTITY_TYPE(term) == UVC_ITT_MEDIA_TRANSPORT_INPUT) 1255 sprintf(term->name, "Media %u", buffer[3]); 1256 else 1257 sprintf(term->name, "Input %u", buffer[3]); 1258 1259 list_add_tail(&term->list, &dev->entities); 1260 break; 1261 1262 case UVC_VC_OUTPUT_TERMINAL: 1263 if (buflen < 9) { 1264 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1265 "interface %d OUTPUT_TERMINAL error\n", 1266 udev->devnum, alts->desc.bInterfaceNumber); 1267 return -EINVAL; 1268 } 1269 1270 /* Make sure the terminal type MSB is not null, otherwise it 1271 * could be confused with a unit. 1272 */ 1273 type = get_unaligned_le16(&buffer[4]); 1274 if ((type & 0xff00) == 0) { 1275 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1276 "interface %d OUTPUT_TERMINAL %d has invalid " 1277 "type 0x%04x, skipping\n", udev->devnum, 1278 alts->desc.bInterfaceNumber, buffer[3], type); 1279 return 0; 1280 } 1281 1282 term = uvc_alloc_entity(type | UVC_TERM_OUTPUT, buffer[3], 1283 1, 0); 1284 if (term == NULL) 1285 return -ENOMEM; 1286 1287 memcpy(term->baSourceID, &buffer[7], 1); 1288 1289 if (buffer[8] != 0) 1290 usb_string(udev, buffer[8], term->name, 1291 sizeof(term->name)); 1292 else 1293 sprintf(term->name, "Output %u", buffer[3]); 1294 1295 list_add_tail(&term->list, &dev->entities); 1296 break; 1297 1298 case UVC_VC_SELECTOR_UNIT: 1299 p = buflen >= 5 ? buffer[4] : 0; 1300 1301 if (buflen < 5 || buflen < 6 + p) { 1302 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1303 "interface %d SELECTOR_UNIT error\n", 1304 udev->devnum, alts->desc.bInterfaceNumber); 1305 return -EINVAL; 1306 } 1307 1308 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, 0); 1309 if (unit == NULL) 1310 return -ENOMEM; 1311 1312 memcpy(unit->baSourceID, &buffer[5], p); 1313 1314 if (buffer[5+p] != 0) 1315 usb_string(udev, buffer[5+p], unit->name, 1316 sizeof(unit->name)); 1317 else 1318 sprintf(unit->name, "Selector %u", buffer[3]); 1319 1320 list_add_tail(&unit->list, &dev->entities); 1321 break; 1322 1323 case UVC_VC_PROCESSING_UNIT: 1324 n = buflen >= 8 ? buffer[7] : 0; 1325 p = dev->uvc_version >= 0x0110 ? 10 : 9; 1326 1327 if (buflen < p + n) { 1328 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1329 "interface %d PROCESSING_UNIT error\n", 1330 udev->devnum, alts->desc.bInterfaceNumber); 1331 return -EINVAL; 1332 } 1333 1334 unit = uvc_alloc_entity(buffer[2], buffer[3], 2, n); 1335 if (unit == NULL) 1336 return -ENOMEM; 1337 1338 memcpy(unit->baSourceID, &buffer[4], 1); 1339 unit->processing.wMaxMultiplier = 1340 get_unaligned_le16(&buffer[5]); 1341 unit->processing.bControlSize = buffer[7]; 1342 unit->processing.bmControls = (u8 *)unit + sizeof(*unit); 1343 memcpy(unit->processing.bmControls, &buffer[8], n); 1344 if (dev->uvc_version >= 0x0110) 1345 unit->processing.bmVideoStandards = buffer[9+n]; 1346 1347 if (buffer[8+n] != 0) 1348 usb_string(udev, buffer[8+n], unit->name, 1349 sizeof(unit->name)); 1350 else 1351 sprintf(unit->name, "Processing %u", buffer[3]); 1352 1353 list_add_tail(&unit->list, &dev->entities); 1354 break; 1355 1356 case UVC_VC_EXTENSION_UNIT: 1357 p = buflen >= 22 ? buffer[21] : 0; 1358 n = buflen >= 24 + p ? buffer[22+p] : 0; 1359 1360 if (buflen < 24 + p + n) { 1361 uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " 1362 "interface %d EXTENSION_UNIT error\n", 1363 udev->devnum, alts->desc.bInterfaceNumber); 1364 return -EINVAL; 1365 } 1366 1367 unit = uvc_alloc_entity(buffer[2], buffer[3], p + 1, n); 1368 if (unit == NULL) 1369 return -ENOMEM; 1370 1371 memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); 1372 unit->extension.bNumControls = buffer[20]; 1373 memcpy(unit->baSourceID, &buffer[22], p); 1374 unit->extension.bControlSize = buffer[22+p]; 1375 unit->extension.bmControls = (u8 *)unit + sizeof(*unit); 1376 memcpy(unit->extension.bmControls, &buffer[23+p], n); 1377 1378 if (buffer[23+p+n] != 0) 1379 usb_string(udev, buffer[23+p+n], unit->name, 1380 sizeof(unit->name)); 1381 else 1382 sprintf(unit->name, "Extension %u", buffer[3]); 1383 1384 list_add_tail(&unit->list, &dev->entities); 1385 break; 1386 1387 default: 1388 uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " 1389 "descriptor (%u)\n", buffer[2]); 1390 break; 1391 } 1392 1393 return 0; 1394 } 1395 1396 static int uvc_parse_control(struct uvc_device *dev) 1397 { 1398 struct usb_host_interface *alts = dev->intf->cur_altsetting; 1399 unsigned char *buffer = alts->extra; 1400 int buflen = alts->extralen; 1401 int ret; 1402 1403 /* Parse the default alternate setting only, as the UVC specification 1404 * defines a single alternate setting, the default alternate setting 1405 * zero. 1406 */ 1407 1408 while (buflen > 2) { 1409 if (uvc_parse_vendor_control(dev, buffer, buflen) || 1410 buffer[1] != USB_DT_CS_INTERFACE) 1411 goto next_descriptor; 1412 1413 if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) 1414 return ret; 1415 1416 next_descriptor: 1417 buflen -= buffer[0]; 1418 buffer += buffer[0]; 1419 } 1420 1421 /* Check if the optional status endpoint is present. Built-in iSight 1422 * webcams have an interrupt endpoint but spit proprietary data that 1423 * don't conform to the UVC status endpoint messages. Don't try to 1424 * handle the interrupt endpoint for those cameras. 1425 */ 1426 if (alts->desc.bNumEndpoints == 1 && 1427 !(dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT)) { 1428 struct usb_host_endpoint *ep = &alts->endpoint[0]; 1429 struct usb_endpoint_descriptor *desc = &ep->desc; 1430 1431 if (usb_endpoint_is_int_in(desc) && 1432 le16_to_cpu(desc->wMaxPacketSize) >= 8 && 1433 desc->bInterval != 0) { 1434 uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " 1435 "(addr %02x).\n", desc->bEndpointAddress); 1436 dev->int_ep = ep; 1437 } 1438 } 1439 1440 return 0; 1441 } 1442 1443 /* ------------------------------------------------------------------------ 1444 * UVC device scan 1445 */ 1446 1447 /* 1448 * Scan the UVC descriptors to locate a chain starting at an Output Terminal 1449 * and containing the following units: 1450 * 1451 * - one or more Output Terminals (USB Streaming or Display) 1452 * - zero or one Processing Unit 1453 * - zero, one or more single-input Selector Units 1454 * - zero or one multiple-input Selector Units, provided all inputs are 1455 * connected to input terminals 1456 * - zero, one or mode single-input Extension Units 1457 * - one or more Input Terminals (Camera, External or USB Streaming) 1458 * 1459 * The terminal and units must match on of the following structures: 1460 * 1461 * ITT_*(0) -> +---------+ +---------+ +---------+ -> TT_STREAMING(0) 1462 * ... | SU{0,1} | -> | PU{0,1} | -> | XU{0,n} | ... 1463 * ITT_*(n) -> +---------+ +---------+ +---------+ -> TT_STREAMING(n) 1464 * 1465 * +---------+ +---------+ -> OTT_*(0) 1466 * TT_STREAMING -> | PU{0,1} | -> | XU{0,n} | ... 1467 * +---------+ +---------+ -> OTT_*(n) 1468 * 1469 * The Processing Unit and Extension Units can be in any order. Additional 1470 * Extension Units connected to the main chain as single-unit branches are 1471 * also supported. Single-input Selector Units are ignored. 1472 */ 1473 static int uvc_scan_chain_entity(struct uvc_video_chain *chain, 1474 struct uvc_entity *entity) 1475 { 1476 switch (UVC_ENTITY_TYPE(entity)) { 1477 case UVC_VC_EXTENSION_UNIT: 1478 if (uvc_trace_param & UVC_TRACE_PROBE) 1479 printk(KERN_CONT " <- XU %d", entity->id); 1480 1481 if (entity->bNrInPins != 1) { 1482 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " 1483 "than 1 input pin.\n", entity->id); 1484 return -1; 1485 } 1486 1487 break; 1488 1489 case UVC_VC_PROCESSING_UNIT: 1490 if (uvc_trace_param & UVC_TRACE_PROBE) 1491 printk(KERN_CONT " <- PU %d", entity->id); 1492 1493 if (chain->processing != NULL) { 1494 uvc_trace(UVC_TRACE_DESCR, "Found multiple " 1495 "Processing Units in chain.\n"); 1496 return -1; 1497 } 1498 1499 chain->processing = entity; 1500 break; 1501 1502 case UVC_VC_SELECTOR_UNIT: 1503 if (uvc_trace_param & UVC_TRACE_PROBE) 1504 printk(KERN_CONT " <- SU %d", entity->id); 1505 1506 /* Single-input selector units are ignored. */ 1507 if (entity->bNrInPins == 1) 1508 break; 1509 1510 if (chain->selector != NULL) { 1511 uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " 1512 "Units in chain.\n"); 1513 return -1; 1514 } 1515 1516 chain->selector = entity; 1517 break; 1518 1519 case UVC_ITT_VENDOR_SPECIFIC: 1520 case UVC_ITT_CAMERA: 1521 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1522 if (uvc_trace_param & UVC_TRACE_PROBE) 1523 printk(KERN_CONT " <- IT %d\n", entity->id); 1524 1525 break; 1526 1527 case UVC_OTT_VENDOR_SPECIFIC: 1528 case UVC_OTT_DISPLAY: 1529 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1530 if (uvc_trace_param & UVC_TRACE_PROBE) 1531 printk(KERN_CONT " OT %d", entity->id); 1532 1533 break; 1534 1535 case UVC_TT_STREAMING: 1536 if (UVC_ENTITY_IS_ITERM(entity)) { 1537 if (uvc_trace_param & UVC_TRACE_PROBE) 1538 printk(KERN_CONT " <- IT %d\n", entity->id); 1539 } else { 1540 if (uvc_trace_param & UVC_TRACE_PROBE) 1541 printk(KERN_CONT " OT %d", entity->id); 1542 } 1543 1544 break; 1545 1546 default: 1547 uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " 1548 "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); 1549 return -1; 1550 } 1551 1552 list_add_tail(&entity->chain, &chain->entities); 1553 return 0; 1554 } 1555 1556 static int uvc_scan_chain_forward(struct uvc_video_chain *chain, 1557 struct uvc_entity *entity, struct uvc_entity *prev) 1558 { 1559 struct uvc_entity *forward; 1560 int found; 1561 1562 /* Forward scan */ 1563 forward = NULL; 1564 found = 0; 1565 1566 while (1) { 1567 forward = uvc_entity_by_reference(chain->dev, entity->id, 1568 forward); 1569 if (forward == NULL) 1570 break; 1571 if (forward == prev) 1572 continue; 1573 if (forward->chain.next || forward->chain.prev) { 1574 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1575 "entity %d already in chain.\n", forward->id); 1576 return -EINVAL; 1577 } 1578 1579 switch (UVC_ENTITY_TYPE(forward)) { 1580 case UVC_VC_EXTENSION_UNIT: 1581 if (forward->bNrInPins != 1) { 1582 uvc_trace(UVC_TRACE_DESCR, "Extension unit %d " 1583 "has more than 1 input pin.\n", 1584 entity->id); 1585 return -EINVAL; 1586 } 1587 1588 list_add_tail(&forward->chain, &chain->entities); 1589 if (uvc_trace_param & UVC_TRACE_PROBE) { 1590 if (!found) 1591 printk(KERN_CONT " (->"); 1592 1593 printk(KERN_CONT " XU %d", forward->id); 1594 found = 1; 1595 } 1596 break; 1597 1598 case UVC_OTT_VENDOR_SPECIFIC: 1599 case UVC_OTT_DISPLAY: 1600 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1601 case UVC_TT_STREAMING: 1602 if (UVC_ENTITY_IS_ITERM(forward)) { 1603 uvc_trace(UVC_TRACE_DESCR, "Unsupported input " 1604 "terminal %u.\n", forward->id); 1605 return -EINVAL; 1606 } 1607 1608 list_add_tail(&forward->chain, &chain->entities); 1609 if (uvc_trace_param & UVC_TRACE_PROBE) { 1610 if (!found) 1611 printk(KERN_CONT " (->"); 1612 1613 printk(KERN_CONT " OT %d", forward->id); 1614 found = 1; 1615 } 1616 break; 1617 } 1618 } 1619 if (found) 1620 printk(KERN_CONT ")"); 1621 1622 return 0; 1623 } 1624 1625 static int uvc_scan_chain_backward(struct uvc_video_chain *chain, 1626 struct uvc_entity **_entity) 1627 { 1628 struct uvc_entity *entity = *_entity; 1629 struct uvc_entity *term; 1630 int id = -EINVAL, i; 1631 1632 switch (UVC_ENTITY_TYPE(entity)) { 1633 case UVC_VC_EXTENSION_UNIT: 1634 case UVC_VC_PROCESSING_UNIT: 1635 id = entity->baSourceID[0]; 1636 break; 1637 1638 case UVC_VC_SELECTOR_UNIT: 1639 /* Single-input selector units are ignored. */ 1640 if (entity->bNrInPins == 1) { 1641 id = entity->baSourceID[0]; 1642 break; 1643 } 1644 1645 if (uvc_trace_param & UVC_TRACE_PROBE) 1646 printk(KERN_CONT " <- IT"); 1647 1648 chain->selector = entity; 1649 for (i = 0; i < entity->bNrInPins; ++i) { 1650 id = entity->baSourceID[i]; 1651 term = uvc_entity_by_id(chain->dev, id); 1652 if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { 1653 uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " 1654 "input %d isn't connected to an " 1655 "input terminal\n", entity->id, i); 1656 return -1; 1657 } 1658 1659 if (term->chain.next || term->chain.prev) { 1660 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1661 "entity %d already in chain.\n", 1662 term->id); 1663 return -EINVAL; 1664 } 1665 1666 if (uvc_trace_param & UVC_TRACE_PROBE) 1667 printk(KERN_CONT " %d", term->id); 1668 1669 list_add_tail(&term->chain, &chain->entities); 1670 uvc_scan_chain_forward(chain, term, entity); 1671 } 1672 1673 if (uvc_trace_param & UVC_TRACE_PROBE) 1674 printk(KERN_CONT "\n"); 1675 1676 id = 0; 1677 break; 1678 1679 case UVC_ITT_VENDOR_SPECIFIC: 1680 case UVC_ITT_CAMERA: 1681 case UVC_ITT_MEDIA_TRANSPORT_INPUT: 1682 case UVC_OTT_VENDOR_SPECIFIC: 1683 case UVC_OTT_DISPLAY: 1684 case UVC_OTT_MEDIA_TRANSPORT_OUTPUT: 1685 case UVC_TT_STREAMING: 1686 id = UVC_ENTITY_IS_OTERM(entity) ? entity->baSourceID[0] : 0; 1687 break; 1688 } 1689 1690 if (id <= 0) { 1691 *_entity = NULL; 1692 return id; 1693 } 1694 1695 entity = uvc_entity_by_id(chain->dev, id); 1696 if (entity == NULL) { 1697 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1698 "unknown entity %d.\n", id); 1699 return -EINVAL; 1700 } 1701 1702 *_entity = entity; 1703 return 0; 1704 } 1705 1706 static int uvc_scan_chain(struct uvc_video_chain *chain, 1707 struct uvc_entity *term) 1708 { 1709 struct uvc_entity *entity, *prev; 1710 1711 uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain:"); 1712 1713 entity = term; 1714 prev = NULL; 1715 1716 while (entity != NULL) { 1717 /* Entity must not be part of an existing chain */ 1718 if (entity->chain.next || entity->chain.prev) { 1719 uvc_trace(UVC_TRACE_DESCR, "Found reference to " 1720 "entity %d already in chain.\n", entity->id); 1721 return -EINVAL; 1722 } 1723 1724 /* Process entity */ 1725 if (uvc_scan_chain_entity(chain, entity) < 0) 1726 return -EINVAL; 1727 1728 /* Forward scan */ 1729 if (uvc_scan_chain_forward(chain, entity, prev) < 0) 1730 return -EINVAL; 1731 1732 /* Backward scan */ 1733 prev = entity; 1734 if (uvc_scan_chain_backward(chain, &entity) < 0) 1735 return -EINVAL; 1736 } 1737 1738 return 0; 1739 } 1740 1741 static unsigned int uvc_print_terms(struct list_head *terms, u16 dir, 1742 char *buffer) 1743 { 1744 struct uvc_entity *term; 1745 unsigned int nterms = 0; 1746 char *p = buffer; 1747 1748 list_for_each_entry(term, terms, chain) { 1749 if (!UVC_ENTITY_IS_TERM(term) || 1750 UVC_TERM_DIRECTION(term) != dir) 1751 continue; 1752 1753 if (nterms) 1754 p += sprintf(p, ","); 1755 if (++nterms >= 4) { 1756 p += sprintf(p, "..."); 1757 break; 1758 } 1759 p += sprintf(p, "%u", term->id); 1760 } 1761 1762 return p - buffer; 1763 } 1764 1765 static const char *uvc_print_chain(struct uvc_video_chain *chain) 1766 { 1767 static char buffer[43]; 1768 char *p = buffer; 1769 1770 p += uvc_print_terms(&chain->entities, UVC_TERM_INPUT, p); 1771 p += sprintf(p, " -> "); 1772 uvc_print_terms(&chain->entities, UVC_TERM_OUTPUT, p); 1773 1774 return buffer; 1775 } 1776 1777 static struct uvc_video_chain *uvc_alloc_chain(struct uvc_device *dev) 1778 { 1779 struct uvc_video_chain *chain; 1780 1781 chain = kzalloc(sizeof(*chain), GFP_KERNEL); 1782 if (chain == NULL) 1783 return NULL; 1784 1785 INIT_LIST_HEAD(&chain->entities); 1786 mutex_init(&chain->ctrl_mutex); 1787 chain->dev = dev; 1788 v4l2_prio_init(&chain->prio); 1789 1790 return chain; 1791 } 1792 1793 /* 1794 * Fallback heuristic for devices that don't connect units and terminals in a 1795 * valid chain. 1796 * 1797 * Some devices have invalid baSourceID references, causing uvc_scan_chain() 1798 * to fail, but if we just take the entities we can find and put them together 1799 * in the most sensible chain we can think of, turns out they do work anyway. 1800 * Note: This heuristic assumes there is a single chain. 1801 * 1802 * At the time of writing, devices known to have such a broken chain are 1803 * - Acer Integrated Camera (5986:055a) 1804 * - Realtek rtl157a7 (0bda:57a7) 1805 */ 1806 static int uvc_scan_fallback(struct uvc_device *dev) 1807 { 1808 struct uvc_video_chain *chain; 1809 struct uvc_entity *iterm = NULL; 1810 struct uvc_entity *oterm = NULL; 1811 struct uvc_entity *entity; 1812 struct uvc_entity *prev; 1813 1814 /* 1815 * Start by locating the input and output terminals. We only support 1816 * devices with exactly one of each for now. 1817 */ 1818 list_for_each_entry(entity, &dev->entities, list) { 1819 if (UVC_ENTITY_IS_ITERM(entity)) { 1820 if (iterm) 1821 return -EINVAL; 1822 iterm = entity; 1823 } 1824 1825 if (UVC_ENTITY_IS_OTERM(entity)) { 1826 if (oterm) 1827 return -EINVAL; 1828 oterm = entity; 1829 } 1830 } 1831 1832 if (iterm == NULL || oterm == NULL) 1833 return -EINVAL; 1834 1835 /* Allocate the chain and fill it. */ 1836 chain = uvc_alloc_chain(dev); 1837 if (chain == NULL) 1838 return -ENOMEM; 1839 1840 if (uvc_scan_chain_entity(chain, oterm) < 0) 1841 goto error; 1842 1843 prev = oterm; 1844 1845 /* 1846 * Add all Processing and Extension Units with two pads. The order 1847 * doesn't matter much, use reverse list traversal to connect units in 1848 * UVC descriptor order as we build the chain from output to input. This 1849 * leads to units appearing in the order meant by the manufacturer for 1850 * the cameras known to require this heuristic. 1851 */ 1852 list_for_each_entry_reverse(entity, &dev->entities, list) { 1853 if (entity->type != UVC_VC_PROCESSING_UNIT && 1854 entity->type != UVC_VC_EXTENSION_UNIT) 1855 continue; 1856 1857 if (entity->num_pads != 2) 1858 continue; 1859 1860 if (uvc_scan_chain_entity(chain, entity) < 0) 1861 goto error; 1862 1863 prev->baSourceID[0] = entity->id; 1864 prev = entity; 1865 } 1866 1867 if (uvc_scan_chain_entity(chain, iterm) < 0) 1868 goto error; 1869 1870 prev->baSourceID[0] = iterm->id; 1871 1872 list_add_tail(&chain->list, &dev->chains); 1873 1874 uvc_trace(UVC_TRACE_PROBE, 1875 "Found a video chain by fallback heuristic (%s).\n", 1876 uvc_print_chain(chain)); 1877 1878 return 0; 1879 1880 error: 1881 kfree(chain); 1882 return -EINVAL; 1883 } 1884 1885 /* 1886 * Scan the device for video chains and register video devices. 1887 * 1888 * Chains are scanned starting at their output terminals and walked backwards. 1889 */ 1890 static int uvc_scan_device(struct uvc_device *dev) 1891 { 1892 struct uvc_video_chain *chain; 1893 struct uvc_entity *term; 1894 1895 list_for_each_entry(term, &dev->entities, list) { 1896 if (!UVC_ENTITY_IS_OTERM(term)) 1897 continue; 1898 1899 /* If the terminal is already included in a chain, skip it. 1900 * This can happen for chains that have multiple output 1901 * terminals, where all output terminals beside the first one 1902 * will be inserted in the chain in forward scans. 1903 */ 1904 if (term->chain.next || term->chain.prev) 1905 continue; 1906 1907 chain = uvc_alloc_chain(dev); 1908 if (chain == NULL) 1909 return -ENOMEM; 1910 1911 term->flags |= UVC_ENTITY_FLAG_DEFAULT; 1912 1913 if (uvc_scan_chain(chain, term) < 0) { 1914 kfree(chain); 1915 continue; 1916 } 1917 1918 uvc_trace(UVC_TRACE_PROBE, "Found a valid video chain (%s).\n", 1919 uvc_print_chain(chain)); 1920 1921 list_add_tail(&chain->list, &dev->chains); 1922 } 1923 1924 if (list_empty(&dev->chains)) 1925 uvc_scan_fallback(dev); 1926 1927 if (list_empty(&dev->chains)) { 1928 uvc_printk(KERN_INFO, "No valid video chain found.\n"); 1929 return -1; 1930 } 1931 1932 return 0; 1933 } 1934 1935 /* ------------------------------------------------------------------------ 1936 * Video device registration and unregistration 1937 */ 1938 1939 /* 1940 * Delete the UVC device. 1941 * 1942 * Called by the kernel when the last reference to the uvc_device structure 1943 * is released. 1944 * 1945 * As this function is called after or during disconnect(), all URBs have 1946 * already been cancelled by the USB core. There is no need to kill the 1947 * interrupt URB manually. 1948 */ 1949 static void uvc_delete(struct kref *kref) 1950 { 1951 struct uvc_device *dev = container_of(kref, struct uvc_device, ref); 1952 struct list_head *p, *n; 1953 1954 uvc_status_cleanup(dev); 1955 uvc_ctrl_cleanup_device(dev); 1956 1957 usb_put_intf(dev->intf); 1958 usb_put_dev(dev->udev); 1959 1960 #ifdef CONFIG_MEDIA_CONTROLLER 1961 media_device_cleanup(&dev->mdev); 1962 #endif 1963 1964 list_for_each_safe(p, n, &dev->chains) { 1965 struct uvc_video_chain *chain; 1966 chain = list_entry(p, struct uvc_video_chain, list); 1967 kfree(chain); 1968 } 1969 1970 list_for_each_safe(p, n, &dev->entities) { 1971 struct uvc_entity *entity; 1972 entity = list_entry(p, struct uvc_entity, list); 1973 #ifdef CONFIG_MEDIA_CONTROLLER 1974 uvc_mc_cleanup_entity(entity); 1975 #endif 1976 kfree(entity); 1977 } 1978 1979 list_for_each_safe(p, n, &dev->streams) { 1980 struct uvc_streaming *streaming; 1981 streaming = list_entry(p, struct uvc_streaming, list); 1982 usb_driver_release_interface(&uvc_driver.driver, 1983 streaming->intf); 1984 uvc_stream_delete(streaming); 1985 } 1986 1987 kfree(dev); 1988 } 1989 1990 static void uvc_release(struct video_device *vdev) 1991 { 1992 struct uvc_streaming *stream = video_get_drvdata(vdev); 1993 struct uvc_device *dev = stream->dev; 1994 1995 kref_put(&dev->ref, uvc_delete); 1996 } 1997 1998 /* 1999 * Unregister the video devices. 2000 */ 2001 static void uvc_unregister_video(struct uvc_device *dev) 2002 { 2003 struct uvc_streaming *stream; 2004 2005 list_for_each_entry(stream, &dev->streams, list) { 2006 if (!video_is_registered(&stream->vdev)) 2007 continue; 2008 2009 video_unregister_device(&stream->vdev); 2010 video_unregister_device(&stream->meta.vdev); 2011 2012 uvc_debugfs_cleanup_stream(stream); 2013 } 2014 2015 uvc_status_unregister(dev); 2016 2017 if (dev->vdev.dev) 2018 v4l2_device_unregister(&dev->vdev); 2019 #ifdef CONFIG_MEDIA_CONTROLLER 2020 if (media_devnode_is_registered(dev->mdev.devnode)) 2021 media_device_unregister(&dev->mdev); 2022 #endif 2023 } 2024 2025 int uvc_register_video_device(struct uvc_device *dev, 2026 struct uvc_streaming *stream, 2027 struct video_device *vdev, 2028 struct uvc_video_queue *queue, 2029 enum v4l2_buf_type type, 2030 const struct v4l2_file_operations *fops, 2031 const struct v4l2_ioctl_ops *ioctl_ops) 2032 { 2033 int ret; 2034 2035 /* Initialize the video buffers queue. */ 2036 ret = uvc_queue_init(queue, type, !uvc_no_drop_param); 2037 if (ret) 2038 return ret; 2039 2040 /* Register the device with V4L. */ 2041 2042 /* 2043 * We already hold a reference to dev->udev. The video device will be 2044 * unregistered before the reference is released, so we don't need to 2045 * get another one. 2046 */ 2047 vdev->v4l2_dev = &dev->vdev; 2048 vdev->fops = fops; 2049 vdev->ioctl_ops = ioctl_ops; 2050 vdev->release = uvc_release; 2051 vdev->prio = &stream->chain->prio; 2052 if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2053 vdev->vfl_dir = VFL_DIR_TX; 2054 else 2055 vdev->vfl_dir = VFL_DIR_RX; 2056 2057 switch (type) { 2058 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 2059 default: 2060 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 2061 break; 2062 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 2063 vdev->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; 2064 break; 2065 case V4L2_BUF_TYPE_META_CAPTURE: 2066 vdev->device_caps = V4L2_CAP_META_CAPTURE | V4L2_CAP_STREAMING; 2067 break; 2068 } 2069 2070 strscpy(vdev->name, dev->name, sizeof(vdev->name)); 2071 2072 /* 2073 * Set the driver data before calling video_register_device, otherwise 2074 * the file open() handler might race us. 2075 */ 2076 video_set_drvdata(vdev, stream); 2077 2078 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); 2079 if (ret < 0) { 2080 uvc_printk(KERN_ERR, "Failed to register %s device (%d).\n", 2081 v4l2_type_names[type], ret); 2082 return ret; 2083 } 2084 2085 kref_get(&dev->ref); 2086 return 0; 2087 } 2088 2089 static int uvc_register_video(struct uvc_device *dev, 2090 struct uvc_streaming *stream) 2091 { 2092 int ret; 2093 2094 /* Initialize the streaming interface with default parameters. */ 2095 ret = uvc_video_init(stream); 2096 if (ret < 0) { 2097 uvc_printk(KERN_ERR, "Failed to initialize the device (%d).\n", 2098 ret); 2099 return ret; 2100 } 2101 2102 if (stream->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) 2103 stream->chain->caps |= V4L2_CAP_VIDEO_CAPTURE 2104 | V4L2_CAP_META_CAPTURE; 2105 else 2106 stream->chain->caps |= V4L2_CAP_VIDEO_OUTPUT; 2107 2108 uvc_debugfs_init_stream(stream); 2109 2110 /* Register the device with V4L. */ 2111 return uvc_register_video_device(dev, stream, &stream->vdev, 2112 &stream->queue, stream->type, 2113 &uvc_fops, &uvc_ioctl_ops); 2114 } 2115 2116 /* 2117 * Register all video devices in all chains. 2118 */ 2119 static int uvc_register_terms(struct uvc_device *dev, 2120 struct uvc_video_chain *chain) 2121 { 2122 struct uvc_streaming *stream; 2123 struct uvc_entity *term; 2124 int ret; 2125 2126 list_for_each_entry(term, &chain->entities, chain) { 2127 if (UVC_ENTITY_TYPE(term) != UVC_TT_STREAMING) 2128 continue; 2129 2130 stream = uvc_stream_by_id(dev, term->id); 2131 if (stream == NULL) { 2132 uvc_printk(KERN_INFO, "No streaming interface found " 2133 "for terminal %u.", term->id); 2134 continue; 2135 } 2136 2137 stream->chain = chain; 2138 ret = uvc_register_video(dev, stream); 2139 if (ret < 0) 2140 return ret; 2141 2142 /* Register a metadata node, but ignore a possible failure, 2143 * complete registration of video nodes anyway. 2144 */ 2145 uvc_meta_register(stream); 2146 2147 term->vdev = &stream->vdev; 2148 } 2149 2150 return 0; 2151 } 2152 2153 static int uvc_register_chains(struct uvc_device *dev) 2154 { 2155 struct uvc_video_chain *chain; 2156 int ret; 2157 2158 list_for_each_entry(chain, &dev->chains, list) { 2159 ret = uvc_register_terms(dev, chain); 2160 if (ret < 0) 2161 return ret; 2162 2163 #ifdef CONFIG_MEDIA_CONTROLLER 2164 ret = uvc_mc_register_entities(chain); 2165 if (ret < 0) 2166 uvc_printk(KERN_INFO, 2167 "Failed to register entities (%d).\n", ret); 2168 #endif 2169 } 2170 2171 return 0; 2172 } 2173 2174 /* ------------------------------------------------------------------------ 2175 * USB probe, disconnect, suspend and resume 2176 */ 2177 2178 static const struct uvc_device_info uvc_quirk_none = { 0 }; 2179 2180 static int uvc_probe(struct usb_interface *intf, 2181 const struct usb_device_id *id) 2182 { 2183 struct usb_device *udev = interface_to_usbdev(intf); 2184 struct uvc_device *dev; 2185 const struct uvc_device_info *info = 2186 (const struct uvc_device_info *)id->driver_info; 2187 int function; 2188 int ret; 2189 2190 if (id->idVendor && id->idProduct) 2191 uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " 2192 "(%04x:%04x)\n", udev->devpath, id->idVendor, 2193 id->idProduct); 2194 else 2195 uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", 2196 udev->devpath); 2197 2198 /* Allocate memory for the device and initialize it. */ 2199 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 2200 if (dev == NULL) 2201 return -ENOMEM; 2202 2203 INIT_LIST_HEAD(&dev->entities); 2204 INIT_LIST_HEAD(&dev->chains); 2205 INIT_LIST_HEAD(&dev->streams); 2206 kref_init(&dev->ref); 2207 atomic_set(&dev->nmappings, 0); 2208 mutex_init(&dev->lock); 2209 2210 dev->udev = usb_get_dev(udev); 2211 dev->intf = usb_get_intf(intf); 2212 dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; 2213 dev->info = info ? info : &uvc_quirk_none; 2214 dev->quirks = uvc_quirks_param == -1 2215 ? dev->info->quirks : uvc_quirks_param; 2216 2217 if (udev->product != NULL) 2218 strscpy(dev->name, udev->product, sizeof(dev->name)); 2219 else 2220 snprintf(dev->name, sizeof(dev->name), 2221 "UVC Camera (%04x:%04x)", 2222 le16_to_cpu(udev->descriptor.idVendor), 2223 le16_to_cpu(udev->descriptor.idProduct)); 2224 2225 /* 2226 * Add iFunction or iInterface to names when available as additional 2227 * distinguishers between interfaces. iFunction is prioritized over 2228 * iInterface which matches Windows behavior at the point of writing. 2229 */ 2230 if (intf->intf_assoc && intf->intf_assoc->iFunction != 0) 2231 function = intf->intf_assoc->iFunction; 2232 else 2233 function = intf->cur_altsetting->desc.iInterface; 2234 if (function != 0) { 2235 size_t len; 2236 2237 strlcat(dev->name, ": ", sizeof(dev->name)); 2238 len = strlen(dev->name); 2239 usb_string(udev, function, dev->name + len, 2240 sizeof(dev->name) - len); 2241 } 2242 2243 /* Initialize the media device. */ 2244 #ifdef CONFIG_MEDIA_CONTROLLER 2245 dev->mdev.dev = &intf->dev; 2246 strscpy(dev->mdev.model, dev->name, sizeof(dev->mdev.model)); 2247 if (udev->serial) 2248 strscpy(dev->mdev.serial, udev->serial, 2249 sizeof(dev->mdev.serial)); 2250 usb_make_path(udev, dev->mdev.bus_info, sizeof(dev->mdev.bus_info)); 2251 dev->mdev.hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 2252 media_device_init(&dev->mdev); 2253 2254 dev->vdev.mdev = &dev->mdev; 2255 #endif 2256 2257 /* Parse the Video Class control descriptor. */ 2258 if (uvc_parse_control(dev) < 0) { 2259 uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " 2260 "descriptors.\n"); 2261 goto error; 2262 } 2263 2264 uvc_printk(KERN_INFO, "Found UVC %u.%02x device %s (%04x:%04x)\n", 2265 dev->uvc_version >> 8, dev->uvc_version & 0xff, 2266 udev->product ? udev->product : "<unnamed>", 2267 le16_to_cpu(udev->descriptor.idVendor), 2268 le16_to_cpu(udev->descriptor.idProduct)); 2269 2270 if (dev->quirks != dev->info->quirks) { 2271 uvc_printk(KERN_INFO, "Forcing device quirks to 0x%x by module " 2272 "parameter for testing purpose.\n", dev->quirks); 2273 uvc_printk(KERN_INFO, "Please report required quirks to the " 2274 "linux-uvc-devel mailing list.\n"); 2275 } 2276 2277 /* Register the V4L2 device. */ 2278 if (v4l2_device_register(&intf->dev, &dev->vdev) < 0) 2279 goto error; 2280 2281 /* Initialize controls. */ 2282 if (uvc_ctrl_init_device(dev) < 0) 2283 goto error; 2284 2285 /* Scan the device for video chains. */ 2286 if (uvc_scan_device(dev) < 0) 2287 goto error; 2288 2289 /* Register video device nodes. */ 2290 if (uvc_register_chains(dev) < 0) 2291 goto error; 2292 2293 #ifdef CONFIG_MEDIA_CONTROLLER 2294 /* Register the media device node */ 2295 if (media_device_register(&dev->mdev) < 0) 2296 goto error; 2297 #endif 2298 /* Save our data pointer in the interface data. */ 2299 usb_set_intfdata(intf, dev); 2300 2301 /* Initialize the interrupt URB. */ 2302 if ((ret = uvc_status_init(dev)) < 0) { 2303 uvc_printk(KERN_INFO, "Unable to initialize the status " 2304 "endpoint (%d), status interrupt will not be " 2305 "supported.\n", ret); 2306 } 2307 2308 uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); 2309 usb_enable_autosuspend(udev); 2310 return 0; 2311 2312 error: 2313 uvc_unregister_video(dev); 2314 kref_put(&dev->ref, uvc_delete); 2315 return -ENODEV; 2316 } 2317 2318 static void uvc_disconnect(struct usb_interface *intf) 2319 { 2320 struct uvc_device *dev = usb_get_intfdata(intf); 2321 2322 /* Set the USB interface data to NULL. This can be done outside the 2323 * lock, as there's no other reader. 2324 */ 2325 usb_set_intfdata(intf, NULL); 2326 2327 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2328 UVC_SC_VIDEOSTREAMING) 2329 return; 2330 2331 uvc_unregister_video(dev); 2332 kref_put(&dev->ref, uvc_delete); 2333 } 2334 2335 static int uvc_suspend(struct usb_interface *intf, pm_message_t message) 2336 { 2337 struct uvc_device *dev = usb_get_intfdata(intf); 2338 struct uvc_streaming *stream; 2339 2340 uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", 2341 intf->cur_altsetting->desc.bInterfaceNumber); 2342 2343 /* Controls are cached on the fly so they don't need to be saved. */ 2344 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2345 UVC_SC_VIDEOCONTROL) { 2346 mutex_lock(&dev->lock); 2347 if (dev->users) 2348 uvc_status_stop(dev); 2349 mutex_unlock(&dev->lock); 2350 return 0; 2351 } 2352 2353 list_for_each_entry(stream, &dev->streams, list) { 2354 if (stream->intf == intf) 2355 return uvc_video_suspend(stream); 2356 } 2357 2358 uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB interface " 2359 "mismatch.\n"); 2360 return -EINVAL; 2361 } 2362 2363 static int __uvc_resume(struct usb_interface *intf, int reset) 2364 { 2365 struct uvc_device *dev = usb_get_intfdata(intf); 2366 struct uvc_streaming *stream; 2367 int ret = 0; 2368 2369 uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", 2370 intf->cur_altsetting->desc.bInterfaceNumber); 2371 2372 if (intf->cur_altsetting->desc.bInterfaceSubClass == 2373 UVC_SC_VIDEOCONTROL) { 2374 if (reset) { 2375 ret = uvc_ctrl_restore_values(dev); 2376 if (ret < 0) 2377 return ret; 2378 } 2379 2380 mutex_lock(&dev->lock); 2381 if (dev->users) 2382 ret = uvc_status_start(dev, GFP_NOIO); 2383 mutex_unlock(&dev->lock); 2384 2385 return ret; 2386 } 2387 2388 list_for_each_entry(stream, &dev->streams, list) { 2389 if (stream->intf == intf) { 2390 ret = uvc_video_resume(stream, reset); 2391 if (ret < 0) 2392 uvc_queue_streamoff(&stream->queue, 2393 stream->queue.queue.type); 2394 return ret; 2395 } 2396 } 2397 2398 uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB interface " 2399 "mismatch.\n"); 2400 return -EINVAL; 2401 } 2402 2403 static int uvc_resume(struct usb_interface *intf) 2404 { 2405 return __uvc_resume(intf, 0); 2406 } 2407 2408 static int uvc_reset_resume(struct usb_interface *intf) 2409 { 2410 return __uvc_resume(intf, 1); 2411 } 2412 2413 /* ------------------------------------------------------------------------ 2414 * Module parameters 2415 */ 2416 2417 static int uvc_clock_param_get(char *buffer, const struct kernel_param *kp) 2418 { 2419 if (uvc_clock_param == CLOCK_MONOTONIC) 2420 return sprintf(buffer, "CLOCK_MONOTONIC"); 2421 else 2422 return sprintf(buffer, "CLOCK_REALTIME"); 2423 } 2424 2425 static int uvc_clock_param_set(const char *val, const struct kernel_param *kp) 2426 { 2427 if (strncasecmp(val, "clock_", strlen("clock_")) == 0) 2428 val += strlen("clock_"); 2429 2430 if (strcasecmp(val, "monotonic") == 0) 2431 uvc_clock_param = CLOCK_MONOTONIC; 2432 else if (strcasecmp(val, "realtime") == 0) 2433 uvc_clock_param = CLOCK_REALTIME; 2434 else 2435 return -EINVAL; 2436 2437 return 0; 2438 } 2439 2440 module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, 2441 &uvc_clock_param, S_IRUGO|S_IWUSR); 2442 MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); 2443 module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, S_IRUGO|S_IWUSR); 2444 MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); 2445 module_param_named(nodrop, uvc_no_drop_param, uint, S_IRUGO|S_IWUSR); 2446 MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); 2447 module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); 2448 MODULE_PARM_DESC(quirks, "Forced device quirks"); 2449 module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); 2450 MODULE_PARM_DESC(trace, "Trace level bitmask"); 2451 module_param_named(timeout, uvc_timeout_param, uint, S_IRUGO|S_IWUSR); 2452 MODULE_PARM_DESC(timeout, "Streaming control requests timeout"); 2453 2454 /* ------------------------------------------------------------------------ 2455 * Driver initialization and cleanup 2456 */ 2457 2458 static const struct uvc_device_info uvc_quirk_probe_minmax = { 2459 .quirks = UVC_QUIRK_PROBE_MINMAX, 2460 }; 2461 2462 static const struct uvc_device_info uvc_quirk_fix_bandwidth = { 2463 .quirks = UVC_QUIRK_FIX_BANDWIDTH, 2464 }; 2465 2466 static const struct uvc_device_info uvc_quirk_probe_def = { 2467 .quirks = UVC_QUIRK_PROBE_DEF, 2468 }; 2469 2470 static const struct uvc_device_info uvc_quirk_stream_no_fid = { 2471 .quirks = UVC_QUIRK_STREAM_NO_FID, 2472 }; 2473 2474 static const struct uvc_device_info uvc_quirk_force_y8 = { 2475 .quirks = UVC_QUIRK_FORCE_Y8, 2476 }; 2477 2478 #define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q} 2479 #define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \ 2480 {.meta_format = m} 2481 2482 /* 2483 * The Logitech cameras listed below have their interface class set to 2484 * VENDOR_SPEC because they don't announce themselves as UVC devices, even 2485 * though they are compliant. 2486 */ 2487 static const struct usb_device_id uvc_ids[] = { 2488 /* LogiLink Wireless Webcam */ 2489 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2490 | USB_DEVICE_ID_MATCH_INT_INFO, 2491 .idVendor = 0x0416, 2492 .idProduct = 0xa91a, 2493 .bInterfaceClass = USB_CLASS_VIDEO, 2494 .bInterfaceSubClass = 1, 2495 .bInterfaceProtocol = 0, 2496 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2497 /* Genius eFace 2025 */ 2498 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2499 | USB_DEVICE_ID_MATCH_INT_INFO, 2500 .idVendor = 0x0458, 2501 .idProduct = 0x706e, 2502 .bInterfaceClass = USB_CLASS_VIDEO, 2503 .bInterfaceSubClass = 1, 2504 .bInterfaceProtocol = 0, 2505 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2506 /* Microsoft Lifecam NX-6000 */ 2507 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2508 | USB_DEVICE_ID_MATCH_INT_INFO, 2509 .idVendor = 0x045e, 2510 .idProduct = 0x00f8, 2511 .bInterfaceClass = USB_CLASS_VIDEO, 2512 .bInterfaceSubClass = 1, 2513 .bInterfaceProtocol = 0, 2514 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2515 /* Microsoft Lifecam NX-3000 */ 2516 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2517 | USB_DEVICE_ID_MATCH_INT_INFO, 2518 .idVendor = 0x045e, 2519 .idProduct = 0x0721, 2520 .bInterfaceClass = USB_CLASS_VIDEO, 2521 .bInterfaceSubClass = 1, 2522 .bInterfaceProtocol = 0, 2523 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2524 /* Microsoft Lifecam VX-7000 */ 2525 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2526 | USB_DEVICE_ID_MATCH_INT_INFO, 2527 .idVendor = 0x045e, 2528 .idProduct = 0x0723, 2529 .bInterfaceClass = USB_CLASS_VIDEO, 2530 .bInterfaceSubClass = 1, 2531 .bInterfaceProtocol = 0, 2532 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2533 /* Logitech Quickcam Fusion */ 2534 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2535 | USB_DEVICE_ID_MATCH_INT_INFO, 2536 .idVendor = 0x046d, 2537 .idProduct = 0x08c1, 2538 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2539 .bInterfaceSubClass = 1, 2540 .bInterfaceProtocol = 0 }, 2541 /* Logitech Quickcam Orbit MP */ 2542 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2543 | USB_DEVICE_ID_MATCH_INT_INFO, 2544 .idVendor = 0x046d, 2545 .idProduct = 0x08c2, 2546 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2547 .bInterfaceSubClass = 1, 2548 .bInterfaceProtocol = 0 }, 2549 /* Logitech Quickcam Pro for Notebook */ 2550 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2551 | USB_DEVICE_ID_MATCH_INT_INFO, 2552 .idVendor = 0x046d, 2553 .idProduct = 0x08c3, 2554 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2555 .bInterfaceSubClass = 1, 2556 .bInterfaceProtocol = 0 }, 2557 /* Logitech Quickcam Pro 5000 */ 2558 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2559 | USB_DEVICE_ID_MATCH_INT_INFO, 2560 .idVendor = 0x046d, 2561 .idProduct = 0x08c5, 2562 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2563 .bInterfaceSubClass = 1, 2564 .bInterfaceProtocol = 0 }, 2565 /* Logitech Quickcam OEM Dell Notebook */ 2566 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2567 | USB_DEVICE_ID_MATCH_INT_INFO, 2568 .idVendor = 0x046d, 2569 .idProduct = 0x08c6, 2570 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2571 .bInterfaceSubClass = 1, 2572 .bInterfaceProtocol = 0 }, 2573 /* Logitech Quickcam OEM Cisco VT Camera II */ 2574 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2575 | USB_DEVICE_ID_MATCH_INT_INFO, 2576 .idVendor = 0x046d, 2577 .idProduct = 0x08c7, 2578 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2579 .bInterfaceSubClass = 1, 2580 .bInterfaceProtocol = 0 }, 2581 /* Logitech HD Pro Webcam C920 */ 2582 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2583 | USB_DEVICE_ID_MATCH_INT_INFO, 2584 .idVendor = 0x046d, 2585 .idProduct = 0x082d, 2586 .bInterfaceClass = USB_CLASS_VIDEO, 2587 .bInterfaceSubClass = 1, 2588 .bInterfaceProtocol = 0, 2589 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTORE_CTRLS_ON_INIT) }, 2590 /* Chicony CNF7129 (Asus EEE 100HE) */ 2591 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2592 | USB_DEVICE_ID_MATCH_INT_INFO, 2593 .idVendor = 0x04f2, 2594 .idProduct = 0xb071, 2595 .bInterfaceClass = USB_CLASS_VIDEO, 2596 .bInterfaceSubClass = 1, 2597 .bInterfaceProtocol = 0, 2598 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_RESTRICT_FRAME_RATE) }, 2599 /* Alcor Micro AU3820 (Future Boy PC USB Webcam) */ 2600 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2601 | USB_DEVICE_ID_MATCH_INT_INFO, 2602 .idVendor = 0x058f, 2603 .idProduct = 0x3820, 2604 .bInterfaceClass = USB_CLASS_VIDEO, 2605 .bInterfaceSubClass = 1, 2606 .bInterfaceProtocol = 0, 2607 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2608 /* Dell XPS m1530 */ 2609 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2610 | USB_DEVICE_ID_MATCH_INT_INFO, 2611 .idVendor = 0x05a9, 2612 .idProduct = 0x2640, 2613 .bInterfaceClass = USB_CLASS_VIDEO, 2614 .bInterfaceSubClass = 1, 2615 .bInterfaceProtocol = 0, 2616 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2617 /* Dell SP2008WFP Monitor */ 2618 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2619 | USB_DEVICE_ID_MATCH_INT_INFO, 2620 .idVendor = 0x05a9, 2621 .idProduct = 0x2641, 2622 .bInterfaceClass = USB_CLASS_VIDEO, 2623 .bInterfaceSubClass = 1, 2624 .bInterfaceProtocol = 0, 2625 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2626 /* Dell Alienware X51 */ 2627 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2628 | USB_DEVICE_ID_MATCH_INT_INFO, 2629 .idVendor = 0x05a9, 2630 .idProduct = 0x2643, 2631 .bInterfaceClass = USB_CLASS_VIDEO, 2632 .bInterfaceSubClass = 1, 2633 .bInterfaceProtocol = 0, 2634 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2635 /* Dell Studio Hybrid 140g (OmniVision webcam) */ 2636 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2637 | USB_DEVICE_ID_MATCH_INT_INFO, 2638 .idVendor = 0x05a9, 2639 .idProduct = 0x264a, 2640 .bInterfaceClass = USB_CLASS_VIDEO, 2641 .bInterfaceSubClass = 1, 2642 .bInterfaceProtocol = 0, 2643 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2644 /* Dell XPS M1330 (OmniVision OV7670 webcam) */ 2645 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2646 | USB_DEVICE_ID_MATCH_INT_INFO, 2647 .idVendor = 0x05a9, 2648 .idProduct = 0x7670, 2649 .bInterfaceClass = USB_CLASS_VIDEO, 2650 .bInterfaceSubClass = 1, 2651 .bInterfaceProtocol = 0, 2652 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2653 /* Apple Built-In iSight */ 2654 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2655 | USB_DEVICE_ID_MATCH_INT_INFO, 2656 .idVendor = 0x05ac, 2657 .idProduct = 0x8501, 2658 .bInterfaceClass = USB_CLASS_VIDEO, 2659 .bInterfaceSubClass = 1, 2660 .bInterfaceProtocol = 0, 2661 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2662 | UVC_QUIRK_BUILTIN_ISIGHT) }, 2663 /* Apple Built-In iSight via iBridge */ 2664 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2665 | USB_DEVICE_ID_MATCH_INT_INFO, 2666 .idVendor = 0x05ac, 2667 .idProduct = 0x8600, 2668 .bInterfaceClass = USB_CLASS_VIDEO, 2669 .bInterfaceSubClass = 1, 2670 .bInterfaceProtocol = 0, 2671 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2672 /* Foxlink ("HP Webcam" on HP Mini 5103) */ 2673 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2674 | USB_DEVICE_ID_MATCH_INT_INFO, 2675 .idVendor = 0x05c8, 2676 .idProduct = 0x0403, 2677 .bInterfaceClass = USB_CLASS_VIDEO, 2678 .bInterfaceSubClass = 1, 2679 .bInterfaceProtocol = 0, 2680 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2681 /* Genesys Logic USB 2.0 PC Camera */ 2682 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2683 | USB_DEVICE_ID_MATCH_INT_INFO, 2684 .idVendor = 0x05e3, 2685 .idProduct = 0x0505, 2686 .bInterfaceClass = USB_CLASS_VIDEO, 2687 .bInterfaceSubClass = 1, 2688 .bInterfaceProtocol = 0, 2689 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2690 /* Hercules Classic Silver */ 2691 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2692 | USB_DEVICE_ID_MATCH_INT_INFO, 2693 .idVendor = 0x06f8, 2694 .idProduct = 0x300c, 2695 .bInterfaceClass = USB_CLASS_VIDEO, 2696 .bInterfaceSubClass = 1, 2697 .bInterfaceProtocol = 0, 2698 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2699 /* ViMicro Vega */ 2700 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2701 | USB_DEVICE_ID_MATCH_INT_INFO, 2702 .idVendor = 0x0ac8, 2703 .idProduct = 0x332d, 2704 .bInterfaceClass = USB_CLASS_VIDEO, 2705 .bInterfaceSubClass = 1, 2706 .bInterfaceProtocol = 0, 2707 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2708 /* ViMicro - Minoru3D */ 2709 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2710 | USB_DEVICE_ID_MATCH_INT_INFO, 2711 .idVendor = 0x0ac8, 2712 .idProduct = 0x3410, 2713 .bInterfaceClass = USB_CLASS_VIDEO, 2714 .bInterfaceSubClass = 1, 2715 .bInterfaceProtocol = 0, 2716 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2717 /* ViMicro Venus - Minoru3D */ 2718 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2719 | USB_DEVICE_ID_MATCH_INT_INFO, 2720 .idVendor = 0x0ac8, 2721 .idProduct = 0x3420, 2722 .bInterfaceClass = USB_CLASS_VIDEO, 2723 .bInterfaceSubClass = 1, 2724 .bInterfaceProtocol = 0, 2725 .driver_info = (kernel_ulong_t)&uvc_quirk_fix_bandwidth }, 2726 /* Ophir Optronics - SPCAM 620U */ 2727 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2728 | USB_DEVICE_ID_MATCH_INT_INFO, 2729 .idVendor = 0x0bd3, 2730 .idProduct = 0x0555, 2731 .bInterfaceClass = USB_CLASS_VIDEO, 2732 .bInterfaceSubClass = 1, 2733 .bInterfaceProtocol = 0, 2734 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2735 /* MT6227 */ 2736 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2737 | USB_DEVICE_ID_MATCH_INT_INFO, 2738 .idVendor = 0x0e8d, 2739 .idProduct = 0x0004, 2740 .bInterfaceClass = USB_CLASS_VIDEO, 2741 .bInterfaceSubClass = 1, 2742 .bInterfaceProtocol = 0, 2743 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2744 | UVC_QUIRK_PROBE_DEF) }, 2745 /* IMC Networks (Medion Akoya) */ 2746 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2747 | USB_DEVICE_ID_MATCH_INT_INFO, 2748 .idVendor = 0x13d3, 2749 .idProduct = 0x5103, 2750 .bInterfaceClass = USB_CLASS_VIDEO, 2751 .bInterfaceSubClass = 1, 2752 .bInterfaceProtocol = 0, 2753 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2754 /* JMicron USB2.0 XGA WebCam */ 2755 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2756 | USB_DEVICE_ID_MATCH_INT_INFO, 2757 .idVendor = 0x152d, 2758 .idProduct = 0x0310, 2759 .bInterfaceClass = USB_CLASS_VIDEO, 2760 .bInterfaceSubClass = 1, 2761 .bInterfaceProtocol = 0, 2762 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2763 /* Syntek (HP Spartan) */ 2764 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2765 | USB_DEVICE_ID_MATCH_INT_INFO, 2766 .idVendor = 0x174f, 2767 .idProduct = 0x5212, 2768 .bInterfaceClass = USB_CLASS_VIDEO, 2769 .bInterfaceSubClass = 1, 2770 .bInterfaceProtocol = 0, 2771 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2772 /* Syntek (Samsung Q310) */ 2773 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2774 | USB_DEVICE_ID_MATCH_INT_INFO, 2775 .idVendor = 0x174f, 2776 .idProduct = 0x5931, 2777 .bInterfaceClass = USB_CLASS_VIDEO, 2778 .bInterfaceSubClass = 1, 2779 .bInterfaceProtocol = 0, 2780 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2781 /* Syntek (Packard Bell EasyNote MX52 */ 2782 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2783 | USB_DEVICE_ID_MATCH_INT_INFO, 2784 .idVendor = 0x174f, 2785 .idProduct = 0x8a12, 2786 .bInterfaceClass = USB_CLASS_VIDEO, 2787 .bInterfaceSubClass = 1, 2788 .bInterfaceProtocol = 0, 2789 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2790 /* Syntek (Asus F9SG) */ 2791 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2792 | USB_DEVICE_ID_MATCH_INT_INFO, 2793 .idVendor = 0x174f, 2794 .idProduct = 0x8a31, 2795 .bInterfaceClass = USB_CLASS_VIDEO, 2796 .bInterfaceSubClass = 1, 2797 .bInterfaceProtocol = 0, 2798 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2799 /* Syntek (Asus U3S) */ 2800 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2801 | USB_DEVICE_ID_MATCH_INT_INFO, 2802 .idVendor = 0x174f, 2803 .idProduct = 0x8a33, 2804 .bInterfaceClass = USB_CLASS_VIDEO, 2805 .bInterfaceSubClass = 1, 2806 .bInterfaceProtocol = 0, 2807 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2808 /* Syntek (JAOtech Smart Terminal) */ 2809 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2810 | USB_DEVICE_ID_MATCH_INT_INFO, 2811 .idVendor = 0x174f, 2812 .idProduct = 0x8a34, 2813 .bInterfaceClass = USB_CLASS_VIDEO, 2814 .bInterfaceSubClass = 1, 2815 .bInterfaceProtocol = 0, 2816 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2817 /* Miricle 307K */ 2818 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2819 | USB_DEVICE_ID_MATCH_INT_INFO, 2820 .idVendor = 0x17dc, 2821 .idProduct = 0x0202, 2822 .bInterfaceClass = USB_CLASS_VIDEO, 2823 .bInterfaceSubClass = 1, 2824 .bInterfaceProtocol = 0, 2825 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2826 /* Lenovo Thinkpad SL400/SL500 */ 2827 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2828 | USB_DEVICE_ID_MATCH_INT_INFO, 2829 .idVendor = 0x17ef, 2830 .idProduct = 0x480b, 2831 .bInterfaceClass = USB_CLASS_VIDEO, 2832 .bInterfaceSubClass = 1, 2833 .bInterfaceProtocol = 0, 2834 .driver_info = (kernel_ulong_t)&uvc_quirk_stream_no_fid }, 2835 /* Aveo Technology USB 2.0 Camera */ 2836 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2837 | USB_DEVICE_ID_MATCH_INT_INFO, 2838 .idVendor = 0x1871, 2839 .idProduct = 0x0306, 2840 .bInterfaceClass = USB_CLASS_VIDEO, 2841 .bInterfaceSubClass = 1, 2842 .bInterfaceProtocol = 0, 2843 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2844 | UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2845 /* Aveo Technology USB 2.0 Camera (Tasco USB Microscope) */ 2846 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2847 | USB_DEVICE_ID_MATCH_INT_INFO, 2848 .idVendor = 0x1871, 2849 .idProduct = 0x0516, 2850 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2851 .bInterfaceSubClass = 1, 2852 .bInterfaceProtocol = 0 }, 2853 /* Ecamm Pico iMage */ 2854 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2855 | USB_DEVICE_ID_MATCH_INT_INFO, 2856 .idVendor = 0x18cd, 2857 .idProduct = 0xcafe, 2858 .bInterfaceClass = USB_CLASS_VIDEO, 2859 .bInterfaceSubClass = 1, 2860 .bInterfaceProtocol = 0, 2861 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_EXTRAFIELDS) }, 2862 /* Manta MM-353 Plako */ 2863 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2864 | USB_DEVICE_ID_MATCH_INT_INFO, 2865 .idVendor = 0x18ec, 2866 .idProduct = 0x3188, 2867 .bInterfaceClass = USB_CLASS_VIDEO, 2868 .bInterfaceSubClass = 1, 2869 .bInterfaceProtocol = 0, 2870 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2871 /* FSC WebCam V30S */ 2872 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2873 | USB_DEVICE_ID_MATCH_INT_INFO, 2874 .idVendor = 0x18ec, 2875 .idProduct = 0x3288, 2876 .bInterfaceClass = USB_CLASS_VIDEO, 2877 .bInterfaceSubClass = 1, 2878 .bInterfaceProtocol = 0, 2879 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2880 /* Arkmicro unbranded */ 2881 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2882 | USB_DEVICE_ID_MATCH_INT_INFO, 2883 .idVendor = 0x18ec, 2884 .idProduct = 0x3290, 2885 .bInterfaceClass = USB_CLASS_VIDEO, 2886 .bInterfaceSubClass = 1, 2887 .bInterfaceProtocol = 0, 2888 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_def }, 2889 /* The Imaging Source USB CCD cameras */ 2890 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2891 | USB_DEVICE_ID_MATCH_INT_INFO, 2892 .idVendor = 0x199e, 2893 .idProduct = 0x8102, 2894 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2895 .bInterfaceSubClass = 1, 2896 .bInterfaceProtocol = 0 }, 2897 /* Bodelin ProScopeHR */ 2898 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2899 | USB_DEVICE_ID_MATCH_DEV_HI 2900 | USB_DEVICE_ID_MATCH_INT_INFO, 2901 .idVendor = 0x19ab, 2902 .idProduct = 0x1000, 2903 .bcdDevice_hi = 0x0126, 2904 .bInterfaceClass = USB_CLASS_VIDEO, 2905 .bInterfaceSubClass = 1, 2906 .bInterfaceProtocol = 0, 2907 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_STATUS_INTERVAL) }, 2908 /* MSI StarCam 370i */ 2909 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2910 | USB_DEVICE_ID_MATCH_INT_INFO, 2911 .idVendor = 0x1b3b, 2912 .idProduct = 0x2951, 2913 .bInterfaceClass = USB_CLASS_VIDEO, 2914 .bInterfaceSubClass = 1, 2915 .bInterfaceProtocol = 0, 2916 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2917 /* Generalplus Technology Inc. 808 Camera */ 2918 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2919 | USB_DEVICE_ID_MATCH_INT_INFO, 2920 .idVendor = 0x1b3f, 2921 .idProduct = 0x2002, 2922 .bInterfaceClass = USB_CLASS_VIDEO, 2923 .bInterfaceSubClass = 1, 2924 .bInterfaceProtocol = 0, 2925 .driver_info = (kernel_ulong_t)&uvc_quirk_probe_minmax }, 2926 /* SiGma Micro USB Web Camera */ 2927 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2928 | USB_DEVICE_ID_MATCH_INT_INFO, 2929 .idVendor = 0x1c4f, 2930 .idProduct = 0x3000, 2931 .bInterfaceClass = USB_CLASS_VIDEO, 2932 .bInterfaceSubClass = 1, 2933 .bInterfaceProtocol = 0, 2934 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX 2935 | UVC_QUIRK_IGNORE_SELECTOR_UNIT) }, 2936 /* Oculus VR Positional Tracker DK2 */ 2937 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2938 | USB_DEVICE_ID_MATCH_INT_INFO, 2939 .idVendor = 0x2833, 2940 .idProduct = 0x0201, 2941 .bInterfaceClass = USB_CLASS_VIDEO, 2942 .bInterfaceSubClass = 1, 2943 .bInterfaceProtocol = 0, 2944 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2945 /* Oculus VR Rift Sensor */ 2946 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2947 | USB_DEVICE_ID_MATCH_INT_INFO, 2948 .idVendor = 0x2833, 2949 .idProduct = 0x0211, 2950 .bInterfaceClass = USB_CLASS_VENDOR_SPEC, 2951 .bInterfaceSubClass = 1, 2952 .bInterfaceProtocol = 0, 2953 .driver_info = (kernel_ulong_t)&uvc_quirk_force_y8 }, 2954 /* GEO Semiconductor GC6500 */ 2955 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2956 | USB_DEVICE_ID_MATCH_INT_INFO, 2957 .idVendor = 0x29fe, 2958 .idProduct = 0x4d53, 2959 .bInterfaceClass = USB_CLASS_VIDEO, 2960 .bInterfaceSubClass = 1, 2961 .bInterfaceProtocol = 0, 2962 .driver_info = UVC_INFO_QUIRK(UVC_QUIRK_FORCE_BPP) }, 2963 /* Intel RealSense D4M */ 2964 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE 2965 | USB_DEVICE_ID_MATCH_INT_INFO, 2966 .idVendor = 0x8086, 2967 .idProduct = 0x0b03, 2968 .bInterfaceClass = USB_CLASS_VIDEO, 2969 .bInterfaceSubClass = 1, 2970 .bInterfaceProtocol = 0, 2971 .driver_info = UVC_INFO_META(V4L2_META_FMT_D4XX) }, 2972 /* Generic USB Video Class */ 2973 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_UNDEFINED) }, 2974 { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, UVC_PC_PROTOCOL_15) }, 2975 {} 2976 }; 2977 2978 MODULE_DEVICE_TABLE(usb, uvc_ids); 2979 2980 struct uvc_driver uvc_driver = { 2981 .driver = { 2982 .name = "uvcvideo", 2983 .probe = uvc_probe, 2984 .disconnect = uvc_disconnect, 2985 .suspend = uvc_suspend, 2986 .resume = uvc_resume, 2987 .reset_resume = uvc_reset_resume, 2988 .id_table = uvc_ids, 2989 .supports_autosuspend = 1, 2990 }, 2991 }; 2992 2993 static int __init uvc_init(void) 2994 { 2995 int ret; 2996 2997 uvc_debugfs_init(); 2998 2999 ret = usb_register(&uvc_driver.driver); 3000 if (ret < 0) { 3001 uvc_debugfs_cleanup(); 3002 return ret; 3003 } 3004 3005 printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); 3006 return 0; 3007 } 3008 3009 static void __exit uvc_cleanup(void) 3010 { 3011 usb_deregister(&uvc_driver.driver); 3012 uvc_debugfs_cleanup(); 3013 } 3014 3015 module_init(uvc_init); 3016 module_exit(uvc_cleanup); 3017 3018 MODULE_AUTHOR(DRIVER_AUTHOR); 3019 MODULE_DESCRIPTION(DRIVER_DESC); 3020 MODULE_LICENSE("GPL"); 3021 MODULE_VERSION(DRIVER_VERSION); 3022 3023