1 #include "qemu/osdep.h" 2 3 #include "hw/usb.h" 4 #include "desc.h" 5 #include "trace.h" 6 7 /* ------------------------------------------------------------------ */ 8 9 int usb_desc_device(const USBDescID *id, const USBDescDevice *dev, 10 bool msos, uint8_t *dest, size_t len) 11 { 12 uint8_t bLength = 0x12; 13 USBDescriptor *d = (void *)dest; 14 15 if (len < bLength) { 16 return -1; 17 } 18 19 d->bLength = bLength; 20 d->bDescriptorType = USB_DT_DEVICE; 21 22 if (msos && dev->bcdUSB < 0x0200) { 23 /* 24 * Version 2.0+ required for microsoft os descriptors to work. 25 * Done this way so msos-desc compat property will handle both 26 * the version and the new descriptors being present. 27 */ 28 d->u.device.bcdUSB_lo = usb_lo(0x0200); 29 d->u.device.bcdUSB_hi = usb_hi(0x0200); 30 } else { 31 d->u.device.bcdUSB_lo = usb_lo(dev->bcdUSB); 32 d->u.device.bcdUSB_hi = usb_hi(dev->bcdUSB); 33 } 34 d->u.device.bDeviceClass = dev->bDeviceClass; 35 d->u.device.bDeviceSubClass = dev->bDeviceSubClass; 36 d->u.device.bDeviceProtocol = dev->bDeviceProtocol; 37 d->u.device.bMaxPacketSize0 = dev->bMaxPacketSize0; 38 39 d->u.device.idVendor_lo = usb_lo(id->idVendor); 40 d->u.device.idVendor_hi = usb_hi(id->idVendor); 41 d->u.device.idProduct_lo = usb_lo(id->idProduct); 42 d->u.device.idProduct_hi = usb_hi(id->idProduct); 43 d->u.device.bcdDevice_lo = usb_lo(id->bcdDevice); 44 d->u.device.bcdDevice_hi = usb_hi(id->bcdDevice); 45 d->u.device.iManufacturer = id->iManufacturer; 46 d->u.device.iProduct = id->iProduct; 47 d->u.device.iSerialNumber = id->iSerialNumber; 48 49 d->u.device.bNumConfigurations = dev->bNumConfigurations; 50 51 return bLength; 52 } 53 54 int usb_desc_device_qualifier(const USBDescDevice *dev, 55 uint8_t *dest, size_t len) 56 { 57 uint8_t bLength = 0x0a; 58 USBDescriptor *d = (void *)dest; 59 60 if (len < bLength) { 61 return -1; 62 } 63 64 d->bLength = bLength; 65 d->bDescriptorType = USB_DT_DEVICE_QUALIFIER; 66 67 d->u.device_qualifier.bcdUSB_lo = usb_lo(dev->bcdUSB); 68 d->u.device_qualifier.bcdUSB_hi = usb_hi(dev->bcdUSB); 69 d->u.device_qualifier.bDeviceClass = dev->bDeviceClass; 70 d->u.device_qualifier.bDeviceSubClass = dev->bDeviceSubClass; 71 d->u.device_qualifier.bDeviceProtocol = dev->bDeviceProtocol; 72 d->u.device_qualifier.bMaxPacketSize0 = dev->bMaxPacketSize0; 73 d->u.device_qualifier.bNumConfigurations = dev->bNumConfigurations; 74 d->u.device_qualifier.bReserved = 0; 75 76 return bLength; 77 } 78 79 int usb_desc_config(const USBDescConfig *conf, int flags, 80 uint8_t *dest, size_t len) 81 { 82 uint8_t bLength = 0x09; 83 uint16_t wTotalLength = 0; 84 USBDescriptor *d = (void *)dest; 85 int i, rc; 86 87 if (len < bLength) { 88 return -1; 89 } 90 91 d->bLength = bLength; 92 d->bDescriptorType = USB_DT_CONFIG; 93 94 d->u.config.bNumInterfaces = conf->bNumInterfaces; 95 d->u.config.bConfigurationValue = conf->bConfigurationValue; 96 d->u.config.iConfiguration = conf->iConfiguration; 97 d->u.config.bmAttributes = conf->bmAttributes; 98 d->u.config.bMaxPower = conf->bMaxPower; 99 wTotalLength += bLength; 100 101 /* handle grouped interfaces if any */ 102 for (i = 0; i < conf->nif_groups; i++) { 103 rc = usb_desc_iface_group(&(conf->if_groups[i]), flags, 104 dest + wTotalLength, 105 len - wTotalLength); 106 if (rc < 0) { 107 return rc; 108 } 109 wTotalLength += rc; 110 } 111 112 /* handle normal (ungrouped / no IAD) interfaces if any */ 113 for (i = 0; i < conf->nif; i++) { 114 rc = usb_desc_iface(conf->ifs + i, flags, 115 dest + wTotalLength, len - wTotalLength); 116 if (rc < 0) { 117 return rc; 118 } 119 wTotalLength += rc; 120 } 121 122 d->u.config.wTotalLength_lo = usb_lo(wTotalLength); 123 d->u.config.wTotalLength_hi = usb_hi(wTotalLength); 124 return wTotalLength; 125 } 126 127 int usb_desc_iface_group(const USBDescIfaceAssoc *iad, int flags, 128 uint8_t *dest, size_t len) 129 { 130 int pos = 0; 131 int i = 0; 132 133 /* handle interface association descriptor */ 134 uint8_t bLength = 0x08; 135 136 if (len < bLength) { 137 return -1; 138 } 139 140 dest[0x00] = bLength; 141 dest[0x01] = USB_DT_INTERFACE_ASSOC; 142 dest[0x02] = iad->bFirstInterface; 143 dest[0x03] = iad->bInterfaceCount; 144 dest[0x04] = iad->bFunctionClass; 145 dest[0x05] = iad->bFunctionSubClass; 146 dest[0x06] = iad->bFunctionProtocol; 147 dest[0x07] = iad->iFunction; 148 pos += bLength; 149 150 /* handle associated interfaces in this group */ 151 for (i = 0; i < iad->nif; i++) { 152 int rc = usb_desc_iface(&(iad->ifs[i]), flags, dest + pos, len - pos); 153 if (rc < 0) { 154 return rc; 155 } 156 pos += rc; 157 } 158 159 return pos; 160 } 161 162 int usb_desc_iface(const USBDescIface *iface, int flags, 163 uint8_t *dest, size_t len) 164 { 165 uint8_t bLength = 0x09; 166 int i, rc, pos = 0; 167 USBDescriptor *d = (void *)dest; 168 169 if (len < bLength) { 170 return -1; 171 } 172 173 d->bLength = bLength; 174 d->bDescriptorType = USB_DT_INTERFACE; 175 176 d->u.interface.bInterfaceNumber = iface->bInterfaceNumber; 177 d->u.interface.bAlternateSetting = iface->bAlternateSetting; 178 d->u.interface.bNumEndpoints = iface->bNumEndpoints; 179 d->u.interface.bInterfaceClass = iface->bInterfaceClass; 180 d->u.interface.bInterfaceSubClass = iface->bInterfaceSubClass; 181 d->u.interface.bInterfaceProtocol = iface->bInterfaceProtocol; 182 d->u.interface.iInterface = iface->iInterface; 183 pos += bLength; 184 185 for (i = 0; i < iface->ndesc; i++) { 186 rc = usb_desc_other(iface->descs + i, dest + pos, len - pos); 187 if (rc < 0) { 188 return rc; 189 } 190 pos += rc; 191 } 192 193 for (i = 0; i < iface->bNumEndpoints; i++) { 194 rc = usb_desc_endpoint(iface->eps + i, flags, dest + pos, len - pos); 195 if (rc < 0) { 196 return rc; 197 } 198 pos += rc; 199 } 200 201 return pos; 202 } 203 204 int usb_desc_endpoint(const USBDescEndpoint *ep, int flags, 205 uint8_t *dest, size_t len) 206 { 207 uint8_t bLength = ep->is_audio ? 0x09 : 0x07; 208 uint8_t extralen = ep->extra ? ep->extra[0] : 0; 209 uint8_t superlen = (flags & USB_DESC_FLAG_SUPER) ? 0x06 : 0; 210 USBDescriptor *d = (void *)dest; 211 212 if (len < bLength + extralen + superlen) { 213 return -1; 214 } 215 216 d->bLength = bLength; 217 d->bDescriptorType = USB_DT_ENDPOINT; 218 219 d->u.endpoint.bEndpointAddress = ep->bEndpointAddress; 220 d->u.endpoint.bmAttributes = ep->bmAttributes; 221 d->u.endpoint.wMaxPacketSize_lo = usb_lo(ep->wMaxPacketSize); 222 d->u.endpoint.wMaxPacketSize_hi = usb_hi(ep->wMaxPacketSize); 223 d->u.endpoint.bInterval = ep->bInterval; 224 if (ep->is_audio) { 225 d->u.endpoint.bRefresh = ep->bRefresh; 226 d->u.endpoint.bSynchAddress = ep->bSynchAddress; 227 } 228 229 if (superlen) { 230 USBDescriptor *d = (void *)(dest + bLength); 231 232 d->bLength = 0x06; 233 d->bDescriptorType = USB_DT_ENDPOINT_COMPANION; 234 235 d->u.super_endpoint.bMaxBurst = ep->bMaxBurst; 236 d->u.super_endpoint.bmAttributes = ep->bmAttributes_super; 237 d->u.super_endpoint.wBytesPerInterval_lo = 238 usb_lo(ep->wBytesPerInterval); 239 d->u.super_endpoint.wBytesPerInterval_hi = 240 usb_hi(ep->wBytesPerInterval); 241 } 242 243 if (ep->extra) { 244 memcpy(dest + bLength + superlen, ep->extra, extralen); 245 } 246 247 return bLength + extralen + superlen; 248 } 249 250 int usb_desc_other(const USBDescOther *desc, uint8_t *dest, size_t len) 251 { 252 int bLength = desc->length ? desc->length : desc->data[0]; 253 254 if (len < bLength) { 255 return -1; 256 } 257 258 memcpy(dest, desc->data, bLength); 259 return bLength; 260 } 261 262 static int usb_desc_cap_usb2_ext(const USBDesc *desc, uint8_t *dest, size_t len) 263 { 264 uint8_t bLength = 0x07; 265 USBDescriptor *d = (void *)dest; 266 267 if (len < bLength) { 268 return -1; 269 } 270 271 d->bLength = bLength; 272 d->bDescriptorType = USB_DT_DEVICE_CAPABILITY; 273 d->u.cap.bDevCapabilityType = USB_DEV_CAP_USB2_EXT; 274 275 d->u.cap.u.usb2_ext.bmAttributes_1 = (1 << 1); /* LPM */ 276 d->u.cap.u.usb2_ext.bmAttributes_2 = 0; 277 d->u.cap.u.usb2_ext.bmAttributes_3 = 0; 278 d->u.cap.u.usb2_ext.bmAttributes_4 = 0; 279 280 return bLength; 281 } 282 283 static int usb_desc_cap_super(const USBDesc *desc, uint8_t *dest, size_t len) 284 { 285 uint8_t bLength = 0x0a; 286 USBDescriptor *d = (void *)dest; 287 288 if (len < bLength) { 289 return -1; 290 } 291 292 d->bLength = bLength; 293 d->bDescriptorType = USB_DT_DEVICE_CAPABILITY; 294 d->u.cap.bDevCapabilityType = USB_DEV_CAP_SUPERSPEED; 295 296 d->u.cap.u.super.bmAttributes = 0; 297 d->u.cap.u.super.wSpeedsSupported_lo = 0; 298 d->u.cap.u.super.wSpeedsSupported_hi = 0; 299 d->u.cap.u.super.bFunctionalitySupport = 0; 300 d->u.cap.u.super.bU1DevExitLat = 0x0a; 301 d->u.cap.u.super.wU2DevExitLat_lo = 0x20; 302 d->u.cap.u.super.wU2DevExitLat_hi = 0; 303 304 if (desc->full) { 305 d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 1); 306 d->u.cap.u.super.bFunctionalitySupport = 1; 307 } 308 if (desc->high) { 309 d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 2); 310 if (!d->u.cap.u.super.bFunctionalitySupport) { 311 d->u.cap.u.super.bFunctionalitySupport = 2; 312 } 313 } 314 if (desc->super) { 315 d->u.cap.u.super.wSpeedsSupported_lo |= (1 << 3); 316 if (!d->u.cap.u.super.bFunctionalitySupport) { 317 d->u.cap.u.super.bFunctionalitySupport = 3; 318 } 319 } 320 321 return bLength; 322 } 323 324 static int usb_desc_bos(const USBDesc *desc, uint8_t *dest, size_t len) 325 { 326 uint8_t bLength = 0x05; 327 uint16_t wTotalLength = 0; 328 uint8_t bNumDeviceCaps = 0; 329 USBDescriptor *d = (void *)dest; 330 int rc; 331 332 if (len < bLength) { 333 return -1; 334 } 335 336 d->bLength = bLength; 337 d->bDescriptorType = USB_DT_BOS; 338 339 wTotalLength += bLength; 340 341 if (desc->high != NULL) { 342 rc = usb_desc_cap_usb2_ext(desc, dest + wTotalLength, 343 len - wTotalLength); 344 if (rc < 0) { 345 return rc; 346 } 347 wTotalLength += rc; 348 bNumDeviceCaps++; 349 } 350 351 if (desc->super != NULL) { 352 rc = usb_desc_cap_super(desc, dest + wTotalLength, 353 len - wTotalLength); 354 if (rc < 0) { 355 return rc; 356 } 357 wTotalLength += rc; 358 bNumDeviceCaps++; 359 } 360 361 d->u.bos.wTotalLength_lo = usb_lo(wTotalLength); 362 d->u.bos.wTotalLength_hi = usb_hi(wTotalLength); 363 d->u.bos.bNumDeviceCaps = bNumDeviceCaps; 364 return wTotalLength; 365 } 366 367 /* ------------------------------------------------------------------ */ 368 369 static void usb_desc_ep_init(USBDevice *dev) 370 { 371 const USBDescIface *iface; 372 int i, e, pid, ep; 373 374 usb_ep_init(dev); 375 for (i = 0; i < dev->ninterfaces; i++) { 376 iface = dev->ifaces[i]; 377 if (iface == NULL) { 378 continue; 379 } 380 for (e = 0; e < iface->bNumEndpoints; e++) { 381 pid = (iface->eps[e].bEndpointAddress & USB_DIR_IN) ? 382 USB_TOKEN_IN : USB_TOKEN_OUT; 383 ep = iface->eps[e].bEndpointAddress & 0x0f; 384 usb_ep_set_type(dev, pid, ep, iface->eps[e].bmAttributes & 0x03); 385 usb_ep_set_ifnum(dev, pid, ep, iface->bInterfaceNumber); 386 usb_ep_set_max_packet_size(dev, pid, ep, 387 iface->eps[e].wMaxPacketSize); 388 usb_ep_set_max_streams(dev, pid, ep, 389 iface->eps[e].bmAttributes_super); 390 } 391 } 392 } 393 394 static const USBDescIface *usb_desc_find_interface(USBDevice *dev, 395 int nif, int alt) 396 { 397 const USBDescIface *iface; 398 int g, i; 399 400 if (!dev->config) { 401 return NULL; 402 } 403 for (g = 0; g < dev->config->nif_groups; g++) { 404 for (i = 0; i < dev->config->if_groups[g].nif; i++) { 405 iface = &dev->config->if_groups[g].ifs[i]; 406 if (iface->bInterfaceNumber == nif && 407 iface->bAlternateSetting == alt) { 408 return iface; 409 } 410 } 411 } 412 for (i = 0; i < dev->config->nif; i++) { 413 iface = &dev->config->ifs[i]; 414 if (iface->bInterfaceNumber == nif && 415 iface->bAlternateSetting == alt) { 416 return iface; 417 } 418 } 419 return NULL; 420 } 421 422 static int usb_desc_set_interface(USBDevice *dev, int index, int value) 423 { 424 const USBDescIface *iface; 425 int old; 426 427 iface = usb_desc_find_interface(dev, index, value); 428 if (iface == NULL) { 429 return -1; 430 } 431 432 old = dev->altsetting[index]; 433 dev->altsetting[index] = value; 434 dev->ifaces[index] = iface; 435 usb_desc_ep_init(dev); 436 437 if (old != value) { 438 usb_device_set_interface(dev, index, old, value); 439 } 440 return 0; 441 } 442 443 static int usb_desc_set_config(USBDevice *dev, int value) 444 { 445 int i; 446 447 if (value == 0) { 448 dev->configuration = 0; 449 dev->ninterfaces = 0; 450 dev->config = NULL; 451 } else { 452 for (i = 0; i < dev->device->bNumConfigurations; i++) { 453 if (dev->device->confs[i].bConfigurationValue == value) { 454 dev->configuration = value; 455 dev->ninterfaces = dev->device->confs[i].bNumInterfaces; 456 dev->config = dev->device->confs + i; 457 assert(dev->ninterfaces <= USB_MAX_INTERFACES); 458 } 459 } 460 if (i < dev->device->bNumConfigurations) { 461 return -1; 462 } 463 } 464 465 for (i = 0; i < dev->ninterfaces; i++) { 466 usb_desc_set_interface(dev, i, 0); 467 } 468 for (; i < USB_MAX_INTERFACES; i++) { 469 dev->altsetting[i] = 0; 470 dev->ifaces[i] = NULL; 471 } 472 473 return 0; 474 } 475 476 static void usb_desc_setdefaults(USBDevice *dev) 477 { 478 const USBDesc *desc = usb_device_get_usb_desc(dev); 479 480 assert(desc != NULL); 481 switch (dev->speed) { 482 case USB_SPEED_LOW: 483 case USB_SPEED_FULL: 484 dev->device = desc->full; 485 break; 486 case USB_SPEED_HIGH: 487 dev->device = desc->high; 488 break; 489 case USB_SPEED_SUPER: 490 dev->device = desc->super; 491 break; 492 } 493 usb_desc_set_config(dev, 0); 494 } 495 496 void usb_desc_init(USBDevice *dev) 497 { 498 const USBDesc *desc = usb_device_get_usb_desc(dev); 499 500 assert(desc != NULL); 501 dev->speed = USB_SPEED_FULL; 502 dev->speedmask = 0; 503 if (desc->full) { 504 dev->speedmask |= USB_SPEED_MASK_FULL; 505 } 506 if (desc->high) { 507 dev->speedmask |= USB_SPEED_MASK_HIGH; 508 } 509 if (desc->super) { 510 dev->speedmask |= USB_SPEED_MASK_SUPER; 511 } 512 if (desc->msos && (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_ENABLE))) { 513 dev->flags |= (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE); 514 usb_desc_set_string(dev, 0xee, "MSFT100Q"); 515 } 516 usb_desc_setdefaults(dev); 517 } 518 519 void usb_desc_attach(USBDevice *dev) 520 { 521 usb_desc_setdefaults(dev); 522 } 523 524 void usb_desc_set_string(USBDevice *dev, uint8_t index, const char *str) 525 { 526 USBDescString *s; 527 528 QLIST_FOREACH(s, &dev->strings, next) { 529 if (s->index == index) { 530 break; 531 } 532 } 533 if (s == NULL) { 534 s = g_malloc0(sizeof(*s)); 535 s->index = index; 536 QLIST_INSERT_HEAD(&dev->strings, s, next); 537 } 538 g_free(s->str); 539 s->str = g_strdup(str); 540 } 541 542 /* 543 * This function creates a serial number for a usb device. 544 * The serial number should: 545 * (a) Be unique within the virtual machine. 546 * (b) Be constant, so you don't get a new one each 547 * time the guest is started. 548 * So we are using the physical location to generate a serial number 549 * from it. It has three pieces: First a fixed, device-specific 550 * prefix. Second the device path of the host controller (which is 551 * the pci address in most cases). Third the physical port path. 552 * Results in serial numbers like this: "314159-0000:00:1d.7-3". 553 */ 554 void usb_desc_create_serial(USBDevice *dev) 555 { 556 DeviceState *hcd = dev->qdev.parent_bus->parent; 557 const USBDesc *desc = usb_device_get_usb_desc(dev); 558 int index = desc->id.iSerialNumber; 559 char *path, *serial; 560 561 if (dev->serial) { 562 /* 'serial' usb bus property has priority if present */ 563 usb_desc_set_string(dev, index, dev->serial); 564 return; 565 } 566 567 assert(index != 0 && desc->str[index] != NULL); 568 path = qdev_get_dev_path(hcd); 569 if (path) { 570 serial = g_strdup_printf("%s-%s-%s", desc->str[index], 571 path, dev->port->path); 572 } else { 573 serial = g_strdup_printf("%s-%s", desc->str[index], dev->port->path); 574 } 575 usb_desc_set_string(dev, index, serial); 576 g_free(path); 577 g_free(serial); 578 } 579 580 const char *usb_desc_get_string(USBDevice *dev, uint8_t index) 581 { 582 USBDescString *s; 583 584 QLIST_FOREACH(s, &dev->strings, next) { 585 if (s->index == index) { 586 return s->str; 587 } 588 } 589 return NULL; 590 } 591 592 int usb_desc_string(USBDevice *dev, int index, uint8_t *dest, size_t len) 593 { 594 uint8_t bLength, pos, i; 595 const char *str; 596 597 if (len < 4) { 598 return -1; 599 } 600 601 if (index == 0) { 602 /* language ids */ 603 dest[0] = 4; 604 dest[1] = USB_DT_STRING; 605 dest[2] = 0x09; 606 dest[3] = 0x04; 607 return 4; 608 } 609 610 str = usb_desc_get_string(dev, index); 611 if (str == NULL) { 612 str = usb_device_get_usb_desc(dev)->str[index]; 613 if (str == NULL) { 614 return 0; 615 } 616 } 617 618 bLength = strlen(str) * 2 + 2; 619 dest[0] = bLength; 620 dest[1] = USB_DT_STRING; 621 i = 0; pos = 2; 622 while (pos+1 < bLength && pos+1 < len) { 623 dest[pos++] = str[i++]; 624 dest[pos++] = 0; 625 } 626 return pos; 627 } 628 629 int usb_desc_get_descriptor(USBDevice *dev, USBPacket *p, 630 int value, uint8_t *dest, size_t len) 631 { 632 bool msos = (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE)); 633 const USBDesc *desc = usb_device_get_usb_desc(dev); 634 const USBDescDevice *other_dev; 635 uint8_t buf[256]; 636 uint8_t type = value >> 8; 637 uint8_t index = value & 0xff; 638 int flags, ret = -1; 639 640 if (dev->speed == USB_SPEED_HIGH) { 641 other_dev = usb_device_get_usb_desc(dev)->full; 642 } else { 643 other_dev = usb_device_get_usb_desc(dev)->high; 644 } 645 646 flags = 0; 647 if (dev->device->bcdUSB >= 0x0300) { 648 flags |= USB_DESC_FLAG_SUPER; 649 } 650 651 switch(type) { 652 case USB_DT_DEVICE: 653 ret = usb_desc_device(&desc->id, dev->device, msos, buf, sizeof(buf)); 654 trace_usb_desc_device(dev->addr, len, ret); 655 break; 656 case USB_DT_CONFIG: 657 if (index < dev->device->bNumConfigurations) { 658 ret = usb_desc_config(dev->device->confs + index, flags, 659 buf, sizeof(buf)); 660 } 661 trace_usb_desc_config(dev->addr, index, len, ret); 662 break; 663 case USB_DT_STRING: 664 ret = usb_desc_string(dev, index, buf, sizeof(buf)); 665 trace_usb_desc_string(dev->addr, index, len, ret); 666 break; 667 case USB_DT_DEVICE_QUALIFIER: 668 if (other_dev != NULL) { 669 ret = usb_desc_device_qualifier(other_dev, buf, sizeof(buf)); 670 } 671 trace_usb_desc_device_qualifier(dev->addr, len, ret); 672 break; 673 case USB_DT_OTHER_SPEED_CONFIG: 674 if (other_dev != NULL && index < other_dev->bNumConfigurations) { 675 ret = usb_desc_config(other_dev->confs + index, flags, 676 buf, sizeof(buf)); 677 buf[0x01] = USB_DT_OTHER_SPEED_CONFIG; 678 } 679 trace_usb_desc_other_speed_config(dev->addr, index, len, ret); 680 break; 681 case USB_DT_BOS: 682 ret = usb_desc_bos(desc, buf, sizeof(buf)); 683 trace_usb_desc_bos(dev->addr, len, ret); 684 break; 685 686 case USB_DT_DEBUG: 687 /* ignore silently */ 688 break; 689 690 default: 691 fprintf(stderr, "%s: %d unknown type %d (len %zd)\n", __func__, 692 dev->addr, type, len); 693 break; 694 } 695 696 if (ret > 0) { 697 if (ret > len) { 698 ret = len; 699 } 700 memcpy(dest, buf, ret); 701 p->actual_length = ret; 702 ret = 0; 703 } 704 return ret; 705 } 706 707 int usb_desc_handle_control(USBDevice *dev, USBPacket *p, 708 int request, int value, int index, int length, uint8_t *data) 709 { 710 bool msos = (dev->flags & (1 << USB_DEV_FLAG_MSOS_DESC_IN_USE)); 711 const USBDesc *desc = usb_device_get_usb_desc(dev); 712 int ret = -1; 713 714 assert(desc != NULL); 715 switch(request) { 716 case DeviceOutRequest | USB_REQ_SET_ADDRESS: 717 dev->addr = value; 718 trace_usb_set_addr(dev->addr); 719 ret = 0; 720 break; 721 722 case DeviceRequest | USB_REQ_GET_DESCRIPTOR: 723 ret = usb_desc_get_descriptor(dev, p, value, data, length); 724 break; 725 726 case DeviceRequest | USB_REQ_GET_CONFIGURATION: 727 /* 728 * 9.4.2: 0 should be returned if the device is unconfigured, otherwise 729 * the non zero value of bConfigurationValue. 730 */ 731 data[0] = dev->config ? dev->config->bConfigurationValue : 0; 732 p->actual_length = 1; 733 ret = 0; 734 break; 735 case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: 736 ret = usb_desc_set_config(dev, value); 737 trace_usb_set_config(dev->addr, value, ret); 738 break; 739 740 case DeviceRequest | USB_REQ_GET_STATUS: { 741 const USBDescConfig *config = dev->config ? 742 dev->config : &dev->device->confs[0]; 743 744 data[0] = 0; 745 /* 746 * Default state: Device behavior when this request is received while 747 * the device is in the Default state is not specified. 748 * We return the same value that a configured device would return if 749 * it used the first configuration. 750 */ 751 if (config->bmAttributes & USB_CFG_ATT_SELFPOWER) { 752 data[0] |= 1 << USB_DEVICE_SELF_POWERED; 753 } 754 if (dev->remote_wakeup) { 755 data[0] |= 1 << USB_DEVICE_REMOTE_WAKEUP; 756 } 757 data[1] = 0x00; 758 p->actual_length = 2; 759 ret = 0; 760 break; 761 } 762 case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: 763 if (value == USB_DEVICE_REMOTE_WAKEUP) { 764 dev->remote_wakeup = 0; 765 ret = 0; 766 } 767 trace_usb_clear_device_feature(dev->addr, value, ret); 768 break; 769 case DeviceOutRequest | USB_REQ_SET_FEATURE: 770 if (value == USB_DEVICE_REMOTE_WAKEUP) { 771 dev->remote_wakeup = 1; 772 ret = 0; 773 } 774 trace_usb_set_device_feature(dev->addr, value, ret); 775 break; 776 777 case DeviceOutRequest | USB_REQ_SET_SEL: 778 case DeviceOutRequest | USB_REQ_SET_ISOCH_DELAY: 779 if (dev->speed == USB_SPEED_SUPER) { 780 ret = 0; 781 } 782 break; 783 784 case InterfaceRequest | USB_REQ_GET_INTERFACE: 785 if (index < 0 || index >= dev->ninterfaces) { 786 break; 787 } 788 data[0] = dev->altsetting[index]; 789 p->actual_length = 1; 790 ret = 0; 791 break; 792 case InterfaceOutRequest | USB_REQ_SET_INTERFACE: 793 ret = usb_desc_set_interface(dev, index, value); 794 trace_usb_set_interface(dev->addr, index, value, ret); 795 break; 796 797 case VendorDeviceRequest | 'Q': 798 if (msos) { 799 ret = usb_desc_msos(desc, p, index, data, length); 800 trace_usb_desc_msos(dev->addr, index, length, ret); 801 } 802 break; 803 case VendorInterfaceRequest | 'Q': 804 if (msos) { 805 ret = usb_desc_msos(desc, p, index, data, length); 806 trace_usb_desc_msos(dev->addr, index, length, ret); 807 } 808 break; 809 810 } 811 return ret; 812 } 813