usbdi.c revision 1.133.2.4
1 /* $NetBSD: usbdi.c,v 1.133.2.4 2013/01/23 00:06:16 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at 9 * Carlstedt Research & Technology and Matthew R. Green (mrg (at) eterna.com.au). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: usbdi.c,v 1.133.2.4 2013/01/23 00:06:16 yamt Exp $"); 35 36 #ifdef _KERNEL_OPT 37 #include "opt_compat_netbsd.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/device.h> 44 #include <sys/malloc.h> 45 #include <sys/proc.h> 46 #include <sys/bus.h> 47 #include <sys/cpu.h> 48 49 #include <dev/usb/usb.h> 50 #include <dev/usb/usbdi.h> 51 #include <dev/usb/usbdi_util.h> 52 #include <dev/usb/usbdivar.h> 53 #include <dev/usb/usb_mem.h> 54 #include <dev/usb/usb_quirks.h> 55 56 /* UTF-8 encoding stuff */ 57 #include <fs/unicode.h> 58 59 #ifdef USB_DEBUG 60 #define DPRINTF(x) if (usbdebug) printf x 61 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 62 extern int usbdebug; 63 #else 64 #define DPRINTF(x) 65 #define DPRINTFN(n,x) 66 #endif 67 68 Static usbd_status usbd_ar_pipe(usbd_pipe_handle pipe); 69 Static void usbd_do_request_async_cb 70 (usbd_xfer_handle, usbd_private_handle, usbd_status); 71 Static void usbd_start_next(usbd_pipe_handle pipe); 72 Static usbd_status usbd_open_pipe_ival 73 (usbd_interface_handle, u_int8_t, u_int8_t, usbd_pipe_handle *, int); 74 75 static inline int 76 usbd_xfer_isread(usbd_xfer_handle xfer) 77 { 78 if (xfer->rqflags & URQ_REQUEST) 79 return (xfer->request.bmRequestType & UT_READ); 80 else 81 return (xfer->pipe->endpoint->edesc->bEndpointAddress & 82 UE_DIR_IN); 83 } 84 85 #if defined(USB_DEBUG) || defined(EHCI_DEBUG) 86 void 87 usbd_dump_iface(struct usbd_interface *iface) 88 { 89 printf("usbd_dump_iface: iface=%p\n", iface); 90 if (iface == NULL) 91 return; 92 printf(" device=%p idesc=%p index=%d altindex=%d priv=%p\n", 93 iface->device, iface->idesc, iface->index, iface->altindex, 94 iface->priv); 95 } 96 97 void 98 usbd_dump_device(struct usbd_device *dev) 99 { 100 printf("usbd_dump_device: dev=%p\n", dev); 101 if (dev == NULL) 102 return; 103 printf(" bus=%p default_pipe=%p\n", dev->bus, dev->default_pipe); 104 printf(" address=%d config=%d depth=%d speed=%d self_powered=%d " 105 "power=%d langid=%d\n", 106 dev->address, dev->config, dev->depth, dev->speed, 107 dev->self_powered, dev->power, dev->langid); 108 } 109 110 void 111 usbd_dump_endpoint(struct usbd_endpoint *endp) 112 { 113 printf("usbd_dump_endpoint: endp=%p\n", endp); 114 if (endp == NULL) 115 return; 116 printf(" edesc=%p refcnt=%d\n", endp->edesc, endp->refcnt); 117 if (endp->edesc) 118 printf(" bEndpointAddress=0x%02x\n", 119 endp->edesc->bEndpointAddress); 120 } 121 122 void 123 usbd_dump_queue(usbd_pipe_handle pipe) 124 { 125 usbd_xfer_handle xfer; 126 127 printf("usbd_dump_queue: pipe=%p\n", pipe); 128 SIMPLEQ_FOREACH(xfer, &pipe->queue, next) { 129 printf(" xfer=%p\n", xfer); 130 } 131 } 132 133 void 134 usbd_dump_pipe(usbd_pipe_handle pipe) 135 { 136 printf("usbd_dump_pipe: pipe=%p\n", pipe); 137 if (pipe == NULL) 138 return; 139 usbd_dump_iface(pipe->iface); 140 usbd_dump_device(pipe->device); 141 usbd_dump_endpoint(pipe->endpoint); 142 printf(" (usbd_dump_pipe:)\n refcnt=%d running=%d aborting=%d\n", 143 pipe->refcnt, pipe->running, pipe->aborting); 144 printf(" intrxfer=%p, repeat=%d, interval=%d\n", 145 pipe->intrxfer, pipe->repeat, pipe->interval); 146 } 147 #endif 148 149 usbd_status 150 usbd_open_pipe(usbd_interface_handle iface, u_int8_t address, 151 u_int8_t flags, usbd_pipe_handle *pipe) 152 { 153 return (usbd_open_pipe_ival(iface, address, flags, pipe, 154 USBD_DEFAULT_INTERVAL)); 155 } 156 157 usbd_status 158 usbd_open_pipe_ival(usbd_interface_handle iface, u_int8_t address, 159 u_int8_t flags, usbd_pipe_handle *pipe, int ival) 160 { 161 usbd_pipe_handle p; 162 struct usbd_endpoint *ep; 163 usbd_status err; 164 int i; 165 166 DPRINTFN(3,("usbd_open_pipe: iface=%p address=0x%x flags=0x%x\n", 167 iface, address, flags)); 168 169 for (i = 0; i < iface->idesc->bNumEndpoints; i++) { 170 ep = &iface->endpoints[i]; 171 if (ep->edesc == NULL) 172 return (USBD_IOERROR); 173 if (ep->edesc->bEndpointAddress == address) 174 goto found; 175 } 176 return (USBD_BAD_ADDRESS); 177 found: 178 if ((flags & USBD_EXCLUSIVE_USE) && ep->refcnt != 0) 179 return (USBD_IN_USE); 180 err = usbd_setup_pipe_flags(iface->device, iface, ep, ival, &p, flags); 181 if (err) 182 return (err); 183 LIST_INSERT_HEAD(&iface->pipes, p, next); 184 *pipe = p; 185 return (USBD_NORMAL_COMPLETION); 186 } 187 188 usbd_status 189 usbd_open_pipe_intr(usbd_interface_handle iface, u_int8_t address, 190 u_int8_t flags, usbd_pipe_handle *pipe, 191 usbd_private_handle priv, void *buffer, u_int32_t len, 192 usbd_callback cb, int ival) 193 { 194 usbd_status err; 195 usbd_xfer_handle xfer; 196 usbd_pipe_handle ipipe; 197 198 DPRINTFN(3,("usbd_open_pipe_intr: address=0x%x flags=0x%x len=%d\n", 199 address, flags, len)); 200 201 err = usbd_open_pipe_ival(iface, address, 202 USBD_EXCLUSIVE_USE | (flags & USBD_MPSAFE), 203 &ipipe, ival); 204 if (err) 205 return (err); 206 xfer = usbd_alloc_xfer(iface->device); 207 if (xfer == NULL) { 208 err = USBD_NOMEM; 209 goto bad1; 210 } 211 usbd_setup_xfer(xfer, ipipe, priv, buffer, len, flags, 212 USBD_NO_TIMEOUT, cb); 213 ipipe->intrxfer = xfer; 214 ipipe->repeat = 1; 215 err = usbd_transfer(xfer); 216 *pipe = ipipe; 217 if (err != USBD_IN_PROGRESS) 218 goto bad2; 219 return (USBD_NORMAL_COMPLETION); 220 221 bad2: 222 ipipe->intrxfer = NULL; 223 ipipe->repeat = 0; 224 usbd_free_xfer(xfer); 225 bad1: 226 usbd_close_pipe(ipipe); 227 return (err); 228 } 229 230 usbd_status 231 usbd_close_pipe(usbd_pipe_handle pipe) 232 { 233 int s; 234 235 #ifdef DIAGNOSTIC 236 if (pipe == NULL) { 237 printf("usbd_close_pipe: pipe==NULL\n"); 238 return (USBD_NORMAL_COMPLETION); 239 } 240 #endif 241 242 usbd_lock_pipe(pipe); 243 if (--pipe->refcnt != 0) { 244 usbd_unlock_pipe(pipe); 245 return (USBD_NORMAL_COMPLETION); 246 } 247 if (! SIMPLEQ_EMPTY(&pipe->queue)) { 248 usbd_unlock_pipe(pipe); 249 return (USBD_PENDING_REQUESTS); 250 } 251 LIST_REMOVE(pipe, next); 252 pipe->endpoint->refcnt--; 253 pipe->methods->close(pipe); 254 usbd_unlock_pipe(pipe); 255 if (pipe->intrxfer != NULL) 256 usbd_free_xfer(pipe->intrxfer); 257 free(pipe, M_USB); 258 return (USBD_NORMAL_COMPLETION); 259 } 260 261 usbd_status 262 usbd_transfer(usbd_xfer_handle xfer) 263 { 264 usbd_pipe_handle pipe = xfer->pipe; 265 usb_dma_t *dmap = &xfer->dmabuf; 266 usbd_status err; 267 unsigned int size, flags; 268 int s; 269 270 DPRINTFN(5,("usbd_transfer: xfer=%p, flags=%#x, pipe=%p, running=%d\n", 271 xfer, xfer->flags, pipe, pipe->running)); 272 273 #ifdef USB_DEBUG 274 if (usbdebug > 5) 275 usbd_dump_queue(pipe); 276 #endif 277 xfer->done = 0; 278 279 if (pipe->aborting) 280 return (USBD_CANCELLED); 281 282 size = xfer->length; 283 /* If there is no buffer, allocate one. */ 284 if (!(xfer->rqflags & URQ_DEV_DMABUF) && size != 0) { 285 struct usbd_bus *bus = pipe->device->bus; 286 287 #ifdef DIAGNOSTIC 288 if (xfer->rqflags & URQ_AUTO_DMABUF) 289 printf("usbd_transfer: has old buffer!\n"); 290 #endif 291 err = bus->methods->allocm(bus, dmap, size); 292 if (err) 293 return (err); 294 xfer->rqflags |= URQ_AUTO_DMABUF; 295 } 296 297 flags = xfer->flags; 298 299 /* Copy data if going out. */ 300 if (!(flags & USBD_NO_COPY) && size != 0 && !usbd_xfer_isread(xfer)) 301 memcpy(KERNADDR(dmap, 0), xfer->buffer, size); 302 303 /* xfer is not valid after the transfer method unless synchronous */ 304 err = pipe->methods->transfer(xfer); 305 306 if (err != USBD_IN_PROGRESS && err) { 307 /* The transfer has not been queued, so free buffer. */ 308 if (xfer->rqflags & URQ_AUTO_DMABUF) { 309 struct usbd_bus *bus = pipe->device->bus; 310 311 bus->methods->freem(bus, &xfer->dmabuf); 312 xfer->rqflags &= ~URQ_AUTO_DMABUF; 313 } 314 } 315 316 if (!(flags & USBD_SYNCHRONOUS)) 317 return (err); 318 319 /* Sync transfer, wait for completion. */ 320 if (err != USBD_IN_PROGRESS) 321 return (err); 322 usbd_lock_pipe(pipe); 323 while (!xfer->done) { 324 if (pipe->device->bus->use_polling) 325 panic("usbd_transfer: not done"); 326 327 err = 0; 328 if ((flags & USBD_SYNCHRONOUS_SIG) != 0) { 329 if (pipe->device->bus->lock) 330 err = cv_wait_sig(&xfer->cv, pipe->device->bus->lock); 331 else 332 err = tsleep(xfer, PZERO|PCATCH, "usbsyn", 0); 333 } else { 334 if (pipe->device->bus->lock) 335 cv_wait(&xfer->cv, pipe->device->bus->lock); 336 else 337 err = tsleep(xfer, PRIBIO, "usbsyn", 0); 338 } 339 if (err) 340 break; 341 } 342 usbd_unlock_pipe(pipe); 343 return (xfer->status); 344 } 345 346 /* Like usbd_transfer(), but waits for completion. */ 347 usbd_status 348 usbd_sync_transfer(usbd_xfer_handle xfer) 349 { 350 xfer->flags |= USBD_SYNCHRONOUS; 351 return (usbd_transfer(xfer)); 352 } 353 354 /* Like usbd_transfer(), but waits for completion and listens for signals. */ 355 usbd_status 356 usbd_sync_transfer_sig(usbd_xfer_handle xfer) 357 { 358 xfer->flags |= USBD_SYNCHRONOUS | USBD_SYNCHRONOUS_SIG; 359 return (usbd_transfer(xfer)); 360 } 361 362 void * 363 usbd_alloc_buffer(usbd_xfer_handle xfer, u_int32_t size) 364 { 365 struct usbd_bus *bus = xfer->device->bus; 366 usbd_status err; 367 368 #ifdef DIAGNOSTIC 369 if (xfer->rqflags & (URQ_DEV_DMABUF | URQ_AUTO_DMABUF)) 370 printf("usbd_alloc_buffer: xfer already has a buffer\n"); 371 #endif 372 err = bus->methods->allocm(bus, &xfer->dmabuf, size); 373 if (err) 374 return (NULL); 375 xfer->rqflags |= URQ_DEV_DMABUF; 376 return (KERNADDR(&xfer->dmabuf, 0)); 377 } 378 379 void 380 usbd_free_buffer(usbd_xfer_handle xfer) 381 { 382 #ifdef DIAGNOSTIC 383 if (!(xfer->rqflags & (URQ_DEV_DMABUF | URQ_AUTO_DMABUF))) { 384 printf("usbd_free_buffer: no buffer\n"); 385 return; 386 } 387 #endif 388 xfer->rqflags &= ~(URQ_DEV_DMABUF | URQ_AUTO_DMABUF); 389 xfer->device->bus->methods->freem(xfer->device->bus, &xfer->dmabuf); 390 } 391 392 void * 393 usbd_get_buffer(usbd_xfer_handle xfer) 394 { 395 if (!(xfer->rqflags & URQ_DEV_DMABUF)) 396 return (0); 397 return (KERNADDR(&xfer->dmabuf, 0)); 398 } 399 400 usbd_xfer_handle 401 usbd_alloc_xfer(usbd_device_handle dev) 402 { 403 usbd_xfer_handle xfer; 404 405 xfer = dev->bus->methods->allocx(dev->bus); 406 if (xfer == NULL) 407 return (NULL); 408 xfer->device = dev; 409 callout_init(&xfer->timeout_handle, 410 dev->bus->methods->get_lock ? CALLOUT_MPSAFE : 0); 411 cv_init(&xfer->cv, "usbxfer"); 412 cv_init(&xfer->hccv, "usbhcxfer"); 413 DPRINTFN(5,("usbd_alloc_xfer() = %p\n", xfer)); 414 return (xfer); 415 } 416 417 usbd_status 418 usbd_free_xfer(usbd_xfer_handle xfer) 419 { 420 DPRINTFN(5,("usbd_free_xfer: %p\n", xfer)); 421 if (xfer->rqflags & (URQ_DEV_DMABUF | URQ_AUTO_DMABUF)) 422 usbd_free_buffer(xfer); 423 #if defined(DIAGNOSTIC) 424 if (callout_pending(&xfer->timeout_handle)) { 425 callout_stop(&xfer->timeout_handle); 426 printf("usbd_free_xfer: timeout_handle pending\n"); 427 } 428 #endif 429 cv_destroy(&xfer->cv); 430 cv_destroy(&xfer->hccv); 431 xfer->device->bus->methods->freex(xfer->device->bus, xfer); 432 return (USBD_NORMAL_COMPLETION); 433 } 434 435 void 436 usbd_setup_xfer(usbd_xfer_handle xfer, usbd_pipe_handle pipe, 437 usbd_private_handle priv, void *buffer, u_int32_t length, 438 u_int16_t flags, u_int32_t timeout, 439 usbd_callback callback) 440 { 441 xfer->pipe = pipe; 442 xfer->priv = priv; 443 xfer->buffer = buffer; 444 xfer->length = length; 445 xfer->actlen = 0; 446 xfer->flags = flags; 447 xfer->timeout = timeout; 448 xfer->status = USBD_NOT_STARTED; 449 xfer->callback = callback; 450 xfer->rqflags &= ~URQ_REQUEST; 451 xfer->nframes = 0; 452 } 453 454 void 455 usbd_setup_default_xfer(usbd_xfer_handle xfer, usbd_device_handle dev, 456 usbd_private_handle priv, u_int32_t timeout, 457 usb_device_request_t *req, void *buffer, 458 u_int32_t length, u_int16_t flags, 459 usbd_callback callback) 460 { 461 xfer->pipe = dev->default_pipe; 462 xfer->priv = priv; 463 xfer->buffer = buffer; 464 xfer->length = length; 465 xfer->actlen = 0; 466 xfer->flags = flags; 467 xfer->timeout = timeout; 468 xfer->status = USBD_NOT_STARTED; 469 xfer->callback = callback; 470 xfer->request = *req; 471 xfer->rqflags |= URQ_REQUEST; 472 xfer->nframes = 0; 473 } 474 475 void 476 usbd_setup_isoc_xfer(usbd_xfer_handle xfer, usbd_pipe_handle pipe, 477 usbd_private_handle priv, u_int16_t *frlengths, 478 u_int32_t nframes, u_int16_t flags, usbd_callback callback) 479 { 480 xfer->pipe = pipe; 481 xfer->priv = priv; 482 xfer->buffer = 0; 483 xfer->length = 0; 484 xfer->actlen = 0; 485 xfer->flags = flags; 486 xfer->timeout = USBD_NO_TIMEOUT; 487 xfer->status = USBD_NOT_STARTED; 488 xfer->callback = callback; 489 xfer->rqflags &= ~URQ_REQUEST; 490 xfer->frlengths = frlengths; 491 xfer->nframes = nframes; 492 } 493 494 void 495 usbd_get_xfer_status(usbd_xfer_handle xfer, usbd_private_handle *priv, 496 void **buffer, u_int32_t *count, usbd_status *status) 497 { 498 if (priv != NULL) 499 *priv = xfer->priv; 500 if (buffer != NULL) 501 *buffer = xfer->buffer; 502 if (count != NULL) 503 *count = xfer->actlen; 504 if (status != NULL) 505 *status = xfer->status; 506 } 507 508 usb_config_descriptor_t * 509 usbd_get_config_descriptor(usbd_device_handle dev) 510 { 511 #ifdef DIAGNOSTIC 512 if (dev == NULL) { 513 printf("usbd_get_config_descriptor: dev == NULL\n"); 514 return (NULL); 515 } 516 #endif 517 return (dev->cdesc); 518 } 519 520 usb_interface_descriptor_t * 521 usbd_get_interface_descriptor(usbd_interface_handle iface) 522 { 523 #ifdef DIAGNOSTIC 524 if (iface == NULL) { 525 printf("usbd_get_interface_descriptor: dev == NULL\n"); 526 return (NULL); 527 } 528 #endif 529 return (iface->idesc); 530 } 531 532 usb_device_descriptor_t * 533 usbd_get_device_descriptor(usbd_device_handle dev) 534 { 535 return (&dev->ddesc); 536 } 537 538 usb_endpoint_descriptor_t * 539 usbd_interface2endpoint_descriptor(usbd_interface_handle iface, u_int8_t index) 540 { 541 if (index >= iface->idesc->bNumEndpoints) 542 return (0); 543 return (iface->endpoints[index].edesc); 544 } 545 546 /* Some drivers may wish to abort requests on the default pipe, * 547 * but there is no mechanism for getting a handle on it. */ 548 usbd_status 549 usbd_abort_default_pipe(struct usbd_device *device) 550 { 551 552 return usbd_abort_pipe(device->default_pipe); 553 } 554 555 usbd_status 556 usbd_abort_pipe(usbd_pipe_handle pipe) 557 { 558 usbd_status err; 559 int s; 560 usbd_xfer_handle intrxfer = pipe->intrxfer; 561 562 #ifdef DIAGNOSTIC 563 if (pipe == NULL) { 564 printf("usbd_abort_pipe: pipe==NULL\n"); 565 return (USBD_NORMAL_COMPLETION); 566 } 567 #endif 568 usbd_lock_pipe(pipe); 569 err = usbd_ar_pipe(pipe); 570 usbd_unlock_pipe(pipe); 571 if (pipe->intrxfer != intrxfer) 572 usbd_free_xfer(intrxfer); 573 return (err); 574 } 575 576 usbd_status 577 usbd_clear_endpoint_stall(usbd_pipe_handle pipe) 578 { 579 usbd_device_handle dev = pipe->device; 580 usb_device_request_t req; 581 usbd_status err; 582 583 DPRINTFN(8, ("usbd_clear_endpoint_stall\n")); 584 585 /* 586 * Clearing en endpoint stall resets the endpoint toggle, so 587 * do the same to the HC toggle. 588 */ 589 pipe->methods->cleartoggle(pipe); 590 591 req.bmRequestType = UT_WRITE_ENDPOINT; 592 req.bRequest = UR_CLEAR_FEATURE; 593 USETW(req.wValue, UF_ENDPOINT_HALT); 594 USETW(req.wIndex, pipe->endpoint->edesc->bEndpointAddress); 595 USETW(req.wLength, 0); 596 err = usbd_do_request(dev, &req, 0); 597 #if 0 598 XXX should we do this? 599 if (!err) { 600 pipe->state = USBD_PIPE_ACTIVE; 601 /* XXX activate pipe */ 602 } 603 #endif 604 return (err); 605 } 606 607 void 608 usbd_clear_endpoint_stall_async_cb(void *arg) 609 { 610 usbd_pipe_handle pipe = arg; 611 usbd_device_handle dev = pipe->device; 612 usb_device_request_t req; 613 614 pipe->methods->cleartoggle(pipe); 615 616 req.bmRequestType = UT_WRITE_ENDPOINT; 617 req.bRequest = UR_CLEAR_FEATURE; 618 USETW(req.wValue, UF_ENDPOINT_HALT); 619 USETW(req.wIndex, pipe->endpoint->edesc->bEndpointAddress); 620 USETW(req.wLength, 0); 621 (void)usbd_do_request_async(dev, &req, 0); 622 } 623 624 void 625 usbd_clear_endpoint_stall_async(usbd_pipe_handle pipe) 626 { 627 628 usb_add_task(pipe->device, &pipe->async_task, USB_TASKQ_DRIVER); 629 } 630 631 void 632 usbd_clear_endpoint_toggle(usbd_pipe_handle pipe) 633 { 634 pipe->methods->cleartoggle(pipe); 635 } 636 637 usbd_status 638 usbd_endpoint_count(usbd_interface_handle iface, u_int8_t *count) 639 { 640 #ifdef DIAGNOSTIC 641 if (iface == NULL || iface->idesc == NULL) { 642 printf("usbd_endpoint_count: NULL pointer\n"); 643 return (USBD_INVAL); 644 } 645 #endif 646 *count = iface->idesc->bNumEndpoints; 647 return (USBD_NORMAL_COMPLETION); 648 } 649 650 usbd_status 651 usbd_interface_count(usbd_device_handle dev, u_int8_t *count) 652 { 653 if (dev->cdesc == NULL) 654 return (USBD_NOT_CONFIGURED); 655 *count = dev->cdesc->bNumInterface; 656 return (USBD_NORMAL_COMPLETION); 657 } 658 659 void 660 usbd_interface2device_handle(usbd_interface_handle iface, 661 usbd_device_handle *dev) 662 { 663 *dev = iface->device; 664 } 665 666 usbd_status 667 usbd_device2interface_handle(usbd_device_handle dev, 668 u_int8_t ifaceno, usbd_interface_handle *iface) 669 { 670 if (dev->cdesc == NULL) 671 return (USBD_NOT_CONFIGURED); 672 if (ifaceno >= dev->cdesc->bNumInterface) 673 return (USBD_INVAL); 674 *iface = &dev->ifaces[ifaceno]; 675 return (USBD_NORMAL_COMPLETION); 676 } 677 678 usbd_device_handle 679 usbd_pipe2device_handle(usbd_pipe_handle pipe) 680 { 681 return (pipe->device); 682 } 683 684 /* XXXX use altno */ 685 usbd_status 686 usbd_set_interface(usbd_interface_handle iface, int altidx) 687 { 688 usb_device_request_t req; 689 usbd_status err; 690 void *endpoints; 691 692 if (LIST_FIRST(&iface->pipes) != 0) 693 return (USBD_IN_USE); 694 695 endpoints = iface->endpoints; 696 err = usbd_fill_iface_data(iface->device, iface->index, altidx); 697 if (err) 698 return (err); 699 700 /* new setting works, we can free old endpoints */ 701 if (endpoints != NULL) 702 free(endpoints, M_USB); 703 704 #ifdef DIAGNOSTIC 705 if (iface->idesc == NULL) { 706 printf("usbd_set_interface: NULL pointer\n"); 707 return (USBD_INVAL); 708 } 709 #endif 710 711 req.bmRequestType = UT_WRITE_INTERFACE; 712 req.bRequest = UR_SET_INTERFACE; 713 USETW(req.wValue, iface->idesc->bAlternateSetting); 714 USETW(req.wIndex, iface->idesc->bInterfaceNumber); 715 USETW(req.wLength, 0); 716 return (usbd_do_request(iface->device, &req, 0)); 717 } 718 719 int 720 usbd_get_no_alts(usb_config_descriptor_t *cdesc, int ifaceno) 721 { 722 char *p = (char *)cdesc; 723 char *end = p + UGETW(cdesc->wTotalLength); 724 usb_interface_descriptor_t *d; 725 int n; 726 727 for (n = 0; p < end; p += d->bLength) { 728 d = (usb_interface_descriptor_t *)p; 729 if (p + d->bLength <= end && 730 d->bDescriptorType == UDESC_INTERFACE && 731 d->bInterfaceNumber == ifaceno) 732 n++; 733 } 734 return (n); 735 } 736 737 int 738 usbd_get_interface_altindex(usbd_interface_handle iface) 739 { 740 return (iface->altindex); 741 } 742 743 usbd_status 744 usbd_get_interface(usbd_interface_handle iface, u_int8_t *aiface) 745 { 746 usb_device_request_t req; 747 748 req.bmRequestType = UT_READ_INTERFACE; 749 req.bRequest = UR_GET_INTERFACE; 750 USETW(req.wValue, 0); 751 USETW(req.wIndex, iface->idesc->bInterfaceNumber); 752 USETW(req.wLength, 1); 753 return (usbd_do_request(iface->device, &req, aiface)); 754 } 755 756 /*** Internal routines ***/ 757 758 /* Dequeue all pipe operations, called at splusb(). */ 759 Static usbd_status 760 usbd_ar_pipe(usbd_pipe_handle pipe) 761 { 762 usbd_xfer_handle xfer; 763 764 KASSERT(pipe->device->bus->lock == NULL || mutex_owned(pipe->device->bus->lock)); 765 766 DPRINTFN(2,("usbd_ar_pipe: pipe=%p\n", pipe)); 767 #ifdef USB_DEBUG 768 if (usbdebug > 5) 769 usbd_dump_queue(pipe); 770 #endif 771 pipe->repeat = 0; 772 pipe->aborting = 1; 773 while ((xfer = SIMPLEQ_FIRST(&pipe->queue)) != NULL) { 774 DPRINTFN(2,("usbd_ar_pipe: pipe=%p xfer=%p (methods=%p)\n", 775 pipe, xfer, pipe->methods)); 776 /* Make the HC abort it (and invoke the callback). */ 777 pipe->methods->abort(xfer); 778 /* XXX only for non-0 usbd_clear_endpoint_stall(pipe); */ 779 } 780 pipe->aborting = 0; 781 return (USBD_NORMAL_COMPLETION); 782 } 783 784 /* Called with USB lock held. */ 785 void 786 usb_transfer_complete(usbd_xfer_handle xfer) 787 { 788 usbd_pipe_handle pipe = xfer->pipe; 789 usb_dma_t *dmap = &xfer->dmabuf; 790 int sync = xfer->flags & USBD_SYNCHRONOUS; 791 int erred = xfer->status == USBD_CANCELLED || 792 xfer->status == USBD_TIMEOUT; 793 int repeat, polling; 794 795 DPRINTFN(5, ("usb_transfer_complete: pipe=%p xfer=%p status=%d " 796 "actlen=%d\n", pipe, xfer, xfer->status, xfer->actlen)); 797 798 KASSERT(pipe->device->bus->lock == NULL || mutex_owned(pipe->device->bus->lock)); 799 800 #ifdef DIAGNOSTIC 801 if (xfer->busy_free != XFER_ONQU) { 802 printf("usb_transfer_complete: xfer=%p not queued 0x%08x\n", 803 xfer, xfer->busy_free); 804 } 805 #endif 806 807 #ifdef DIAGNOSTIC 808 if (pipe == NULL) { 809 printf("usb_transfer_complete: pipe==0, xfer=%p\n", xfer); 810 return; 811 } 812 #endif 813 repeat = pipe->repeat; 814 polling = pipe->device->bus->use_polling; 815 /* XXXX */ 816 if (polling) 817 pipe->running = 0; 818 819 if (!(xfer->flags & USBD_NO_COPY) && xfer->actlen != 0 && 820 usbd_xfer_isread(xfer)) { 821 #ifdef DIAGNOSTIC 822 if (xfer->actlen > xfer->length) { 823 printf("%s: actlen (%d) > len (%d)\n", __func__, 824 xfer->actlen, xfer->length); 825 xfer->actlen = xfer->length; 826 } 827 #endif 828 memcpy(xfer->buffer, KERNADDR(dmap, 0), xfer->actlen); 829 } 830 831 /* if we allocated the buffer in usbd_transfer() we free it here. */ 832 if (xfer->rqflags & URQ_AUTO_DMABUF) { 833 if (!repeat) { 834 struct usbd_bus *bus = pipe->device->bus; 835 bus->methods->freem(bus, dmap); 836 xfer->rqflags &= ~URQ_AUTO_DMABUF; 837 } 838 } 839 840 if (!repeat) { 841 /* Remove request from queue. */ 842 843 KASSERTMSG(!SIMPLEQ_EMPTY(&pipe->queue), 844 "pipe %p is empty, but xfer %p wants to complete", pipe, 845 xfer); 846 #ifdef DIAGNOSTIC 847 if (xfer != SIMPLEQ_FIRST(&pipe->queue)) 848 printf("%s: bad dequeue %p != %p\n", __func__, 849 xfer, SIMPLEQ_FIRST(&pipe->queue)); 850 xfer->busy_free = XFER_BUSY; 851 #endif 852 SIMPLEQ_REMOVE_HEAD(&pipe->queue, next); 853 } 854 DPRINTFN(5,("usb_transfer_complete: repeat=%d new head=%p\n", 855 repeat, SIMPLEQ_FIRST(&pipe->queue))); 856 857 /* Count completed transfers. */ 858 ++pipe->device->bus->stats.uds_requests 859 [pipe->endpoint->edesc->bmAttributes & UE_XFERTYPE]; 860 861 xfer->done = 1; 862 if (!xfer->status && xfer->actlen < xfer->length && 863 !(xfer->flags & USBD_SHORT_XFER_OK)) { 864 DPRINTFN(-1,("usb_transfer_complete: short transfer %d<%d\n", 865 xfer->actlen, xfer->length)); 866 xfer->status = USBD_SHORT_XFER; 867 } 868 869 if (repeat) { 870 if (xfer->callback) { 871 if (pipe->device->bus->lock) 872 mutex_exit(pipe->device->bus->lock); 873 874 if (!(pipe->flags & USBD_MPSAFE)) 875 KERNEL_LOCK(1, curlwp); 876 xfer->callback(xfer, xfer->priv, xfer->status); 877 if (!(pipe->flags & USBD_MPSAFE)) 878 KERNEL_UNLOCK_ONE(curlwp); 879 880 if (pipe->device->bus->lock) 881 mutex_enter(pipe->device->bus->lock); 882 } 883 pipe->methods->done(xfer); 884 } else { 885 pipe->methods->done(xfer); 886 if (xfer->callback) { 887 if (pipe->device->bus->lock) 888 mutex_exit(pipe->device->bus->lock); 889 890 if (!(pipe->flags & USBD_MPSAFE)) 891 KERNEL_LOCK(1, curlwp); 892 xfer->callback(xfer, xfer->priv, xfer->status); 893 if (!(pipe->flags & USBD_MPSAFE)) 894 KERNEL_UNLOCK_ONE(curlwp); 895 896 if (pipe->device->bus->lock) 897 mutex_enter(pipe->device->bus->lock); 898 } 899 } 900 901 if (sync && !polling) { 902 if (pipe->device->bus->lock) 903 cv_broadcast(&xfer->cv); 904 else 905 wakeup(xfer); /* XXXSMP ok */ 906 } 907 908 if (!repeat) { 909 /* XXX should we stop the queue on all errors? */ 910 if (erred && pipe->iface != NULL) /* not control pipe */ 911 pipe->running = 0; 912 else 913 usbd_start_next(pipe); 914 } 915 } 916 917 /* Called with USB lock held. */ 918 usbd_status 919 usb_insert_transfer(usbd_xfer_handle xfer) 920 { 921 usbd_pipe_handle pipe = xfer->pipe; 922 usbd_status err; 923 924 DPRINTFN(5,("usb_insert_transfer: pipe=%p running=%d timeout=%d\n", 925 pipe, pipe->running, xfer->timeout)); 926 927 KASSERT(pipe->device->bus->lock == NULL || mutex_owned(pipe->device->bus->lock)); 928 929 #ifdef DIAGNOSTIC 930 if (xfer->busy_free != XFER_BUSY) { 931 printf("usb_insert_transfer: xfer=%p not busy 0x%08x\n", 932 xfer, xfer->busy_free); 933 return (USBD_INVAL); 934 } 935 xfer->busy_free = XFER_ONQU; 936 #endif 937 SIMPLEQ_INSERT_TAIL(&pipe->queue, xfer, next); 938 if (pipe->running) 939 err = USBD_IN_PROGRESS; 940 else { 941 pipe->running = 1; 942 err = USBD_NORMAL_COMPLETION; 943 } 944 return (err); 945 } 946 947 /* Called with USB lock held. */ 948 void 949 usbd_start_next(usbd_pipe_handle pipe) 950 { 951 usbd_xfer_handle xfer; 952 usbd_status err; 953 954 #ifdef DIAGNOSTIC 955 if (pipe == NULL) { 956 printf("usbd_start_next: pipe == NULL\n"); 957 return; 958 } 959 if (pipe->methods == NULL || pipe->methods->start == NULL) { 960 printf("usbd_start_next: pipe=%p no start method\n", pipe); 961 return; 962 } 963 #endif 964 965 KASSERT(pipe->device->bus->lock == NULL || mutex_owned(pipe->device->bus->lock)); 966 967 /* Get next request in queue. */ 968 xfer = SIMPLEQ_FIRST(&pipe->queue); 969 DPRINTFN(5, ("usbd_start_next: pipe=%p, xfer=%p\n", pipe, xfer)); 970 if (xfer == NULL) { 971 pipe->running = 0; 972 } else { 973 if (pipe->device->bus->lock) 974 mutex_exit(pipe->device->bus->lock); 975 err = pipe->methods->start(xfer); 976 if (pipe->device->bus->lock) 977 mutex_enter(pipe->device->bus->lock); 978 if (err != USBD_IN_PROGRESS) { 979 printf("usbd_start_next: error=%d\n", err); 980 pipe->running = 0; 981 /* XXX do what? */ 982 } 983 } 984 985 KASSERT(pipe->device->bus->lock == NULL || mutex_owned(pipe->device->bus->lock)); 986 } 987 988 usbd_status 989 usbd_do_request(usbd_device_handle dev, usb_device_request_t *req, void *data) 990 { 991 return (usbd_do_request_flags(dev, req, data, 0, 0, 992 USBD_DEFAULT_TIMEOUT)); 993 } 994 995 usbd_status 996 usbd_do_request_flags(usbd_device_handle dev, usb_device_request_t *req, 997 void *data, u_int16_t flags, int *actlen, u_int32_t timo) 998 { 999 return (usbd_do_request_flags_pipe(dev, dev->default_pipe, req, 1000 data, flags, actlen, timo)); 1001 } 1002 1003 usbd_status 1004 usbd_do_request_flags_pipe(usbd_device_handle dev, usbd_pipe_handle pipe, 1005 usb_device_request_t *req, void *data, u_int16_t flags, int *actlen, 1006 u_int32_t timeout) 1007 { 1008 usbd_xfer_handle xfer; 1009 usbd_status err; 1010 1011 #ifdef DIAGNOSTIC 1012 if (cpu_intr_p() || cpu_softintr_p()) { 1013 printf("usbd_do_request: not in process context\n"); 1014 return (USBD_INVAL); 1015 } 1016 #endif 1017 1018 xfer = usbd_alloc_xfer(dev); 1019 if (xfer == NULL) 1020 return (USBD_NOMEM); 1021 usbd_setup_default_xfer(xfer, dev, 0, timeout, req, 1022 data, UGETW(req->wLength), flags, 0); 1023 xfer->pipe = pipe; 1024 err = usbd_sync_transfer(xfer); 1025 #if defined(USB_DEBUG) || defined(DIAGNOSTIC) 1026 if (xfer->actlen > xfer->length) { 1027 DPRINTF(("%s: overrun addr=%d type=0x%02x req=0x" 1028 "%02x val=%d index=%d rlen=%d length=%d actlen=%d\n", 1029 __func__, dev->address, xfer->request.bmRequestType, 1030 xfer->request.bRequest, UGETW(xfer->request.wValue), 1031 UGETW(xfer->request.wIndex), 1032 UGETW(xfer->request.wLength), 1033 xfer->length, xfer->actlen)); 1034 } 1035 #endif 1036 if (actlen != NULL) 1037 *actlen = xfer->actlen; 1038 if (err == USBD_STALLED) { 1039 /* 1040 * The control endpoint has stalled. Control endpoints 1041 * should not halt, but some may do so anyway so clear 1042 * any halt condition. 1043 */ 1044 usb_device_request_t treq; 1045 usb_status_t status; 1046 u_int16_t s; 1047 usbd_status nerr; 1048 1049 treq.bmRequestType = UT_READ_ENDPOINT; 1050 treq.bRequest = UR_GET_STATUS; 1051 USETW(treq.wValue, 0); 1052 USETW(treq.wIndex, 0); 1053 USETW(treq.wLength, sizeof(usb_status_t)); 1054 usbd_setup_default_xfer(xfer, dev, 0, USBD_DEFAULT_TIMEOUT, 1055 &treq, &status,sizeof(usb_status_t), 1056 0, 0); 1057 nerr = usbd_sync_transfer(xfer); 1058 if (nerr) 1059 goto bad; 1060 s = UGETW(status.wStatus); 1061 DPRINTF(("usbd_do_request: status = 0x%04x\n", s)); 1062 if (!(s & UES_HALT)) 1063 goto bad; 1064 treq.bmRequestType = UT_WRITE_ENDPOINT; 1065 treq.bRequest = UR_CLEAR_FEATURE; 1066 USETW(treq.wValue, UF_ENDPOINT_HALT); 1067 USETW(treq.wIndex, 0); 1068 USETW(treq.wLength, 0); 1069 usbd_setup_default_xfer(xfer, dev, 0, USBD_DEFAULT_TIMEOUT, 1070 &treq, &status, 0, 0, 0); 1071 nerr = usbd_sync_transfer(xfer); 1072 if (nerr) 1073 goto bad; 1074 } 1075 1076 bad: 1077 if (err) { 1078 DPRINTF(("%s: returning err=%s\n", __func__, usbd_errstr(err))); 1079 } 1080 usbd_free_xfer(xfer); 1081 return (err); 1082 } 1083 1084 void 1085 usbd_do_request_async_cb(usbd_xfer_handle xfer, 1086 usbd_private_handle priv, usbd_status status) 1087 { 1088 #if defined(USB_DEBUG) || defined(DIAGNOSTIC) 1089 if (xfer->actlen > xfer->length) { 1090 DPRINTF(("usbd_do_request: overrun addr=%d type=0x%02x req=0x" 1091 "%02x val=%d index=%d rlen=%d length=%d actlen=%d\n", 1092 xfer->pipe->device->address, 1093 xfer->request.bmRequestType, 1094 xfer->request.bRequest, UGETW(xfer->request.wValue), 1095 UGETW(xfer->request.wIndex), 1096 UGETW(xfer->request.wLength), 1097 xfer->length, xfer->actlen)); 1098 } 1099 #endif 1100 usbd_free_xfer(xfer); 1101 } 1102 1103 /* 1104 * Execute a request without waiting for completion. 1105 * Can be used from interrupt context. 1106 */ 1107 usbd_status 1108 usbd_do_request_async(usbd_device_handle dev, usb_device_request_t *req, 1109 void *data) 1110 { 1111 usbd_xfer_handle xfer; 1112 usbd_status err; 1113 1114 xfer = usbd_alloc_xfer(dev); 1115 if (xfer == NULL) 1116 return (USBD_NOMEM); 1117 usbd_setup_default_xfer(xfer, dev, 0, USBD_DEFAULT_TIMEOUT, req, 1118 data, UGETW(req->wLength), 0, usbd_do_request_async_cb); 1119 err = usbd_transfer(xfer); 1120 if (err != USBD_IN_PROGRESS) { 1121 usbd_free_xfer(xfer); 1122 return (err); 1123 } 1124 return (USBD_NORMAL_COMPLETION); 1125 } 1126 1127 const struct usbd_quirks * 1128 usbd_get_quirks(usbd_device_handle dev) 1129 { 1130 #ifdef DIAGNOSTIC 1131 if (dev == NULL) { 1132 printf("usbd_get_quirks: dev == NULL\n"); 1133 return 0; 1134 } 1135 #endif 1136 return (dev->quirks); 1137 } 1138 1139 /* XXX do periodic free() of free list */ 1140 1141 /* 1142 * Called from keyboard driver when in polling mode. 1143 */ 1144 void 1145 usbd_dopoll(usbd_interface_handle iface) 1146 { 1147 iface->device->bus->methods->do_poll(iface->device->bus); 1148 } 1149 1150 /* 1151 * XXX use this more??? use_polling it touched manually all over 1152 */ 1153 void 1154 usbd_set_polling(usbd_device_handle dev, int on) 1155 { 1156 if (on) 1157 dev->bus->use_polling++; 1158 else 1159 dev->bus->use_polling--; 1160 1161 /* Kick the host controller when switching modes */ 1162 if (dev->bus->lock) 1163 mutex_enter(dev->bus->lock); 1164 (*dev->bus->methods->soft_intr)(dev->bus); 1165 if (dev->bus->lock) 1166 mutex_exit(dev->bus->lock); 1167 1168 } 1169 1170 1171 usb_endpoint_descriptor_t * 1172 usbd_get_endpoint_descriptor(usbd_interface_handle iface, u_int8_t address) 1173 { 1174 struct usbd_endpoint *ep; 1175 int i; 1176 1177 for (i = 0; i < iface->idesc->bNumEndpoints; i++) { 1178 ep = &iface->endpoints[i]; 1179 if (ep->edesc->bEndpointAddress == address) 1180 return (iface->endpoints[i].edesc); 1181 } 1182 return (0); 1183 } 1184 1185 /* 1186 * usbd_ratecheck() can limit the number of error messages that occurs. 1187 * When a device is unplugged it may take up to 0.25s for the hub driver 1188 * to notice it. If the driver continuosly tries to do I/O operations 1189 * this can generate a large number of messages. 1190 */ 1191 int 1192 usbd_ratecheck(struct timeval *last) 1193 { 1194 static struct timeval errinterval = { 0, 250000 }; /* 0.25 s*/ 1195 1196 return (ratecheck(last, &errinterval)); 1197 } 1198 1199 /* 1200 * Search for a vendor/product pair in an array. The item size is 1201 * given as an argument. 1202 */ 1203 const struct usb_devno * 1204 usb_match_device(const struct usb_devno *tbl, u_int nentries, u_int sz, 1205 u_int16_t vendor, u_int16_t product) 1206 { 1207 while (nentries-- > 0) { 1208 u_int16_t tproduct = tbl->ud_product; 1209 if (tbl->ud_vendor == vendor && 1210 (tproduct == product || tproduct == USB_PRODUCT_ANY)) 1211 return (tbl); 1212 tbl = (const struct usb_devno *)((const char *)tbl + sz); 1213 } 1214 return (NULL); 1215 } 1216 1217 1218 void 1219 usb_desc_iter_init(usbd_device_handle dev, usbd_desc_iter_t *iter) 1220 { 1221 const usb_config_descriptor_t *cd = usbd_get_config_descriptor(dev); 1222 1223 iter->cur = (const uByte *)cd; 1224 iter->end = (const uByte *)cd + UGETW(cd->wTotalLength); 1225 } 1226 1227 const usb_descriptor_t * 1228 usb_desc_iter_next(usbd_desc_iter_t *iter) 1229 { 1230 const usb_descriptor_t *desc; 1231 1232 if (iter->cur + sizeof(usb_descriptor_t) >= iter->end) { 1233 if (iter->cur != iter->end) 1234 printf("usb_desc_iter_next: bad descriptor\n"); 1235 return NULL; 1236 } 1237 desc = (const usb_descriptor_t *)iter->cur; 1238 if (desc->bLength == 0) { 1239 printf("usb_desc_iter_next: descriptor length = 0\n"); 1240 return NULL; 1241 } 1242 iter->cur += desc->bLength; 1243 if (iter->cur > iter->end) { 1244 printf("usb_desc_iter_next: descriptor length too large\n"); 1245 return NULL; 1246 } 1247 return desc; 1248 } 1249 1250 usbd_status 1251 usbd_get_string(usbd_device_handle dev, int si, char *buf) 1252 { 1253 return usbd_get_string0(dev, si, buf, 1); 1254 } 1255 1256 usbd_status 1257 usbd_get_string0(usbd_device_handle dev, int si, char *buf, int unicode) 1258 { 1259 int swap = dev->quirks->uq_flags & UQ_SWAP_UNICODE; 1260 usb_string_descriptor_t us; 1261 char *s; 1262 int i, n; 1263 u_int16_t c; 1264 usbd_status err; 1265 int size; 1266 1267 buf[0] = '\0'; 1268 if (si == 0) 1269 return (USBD_INVAL); 1270 if (dev->quirks->uq_flags & UQ_NO_STRINGS) 1271 return (USBD_STALLED); 1272 if (dev->langid == USBD_NOLANG) { 1273 /* Set up default language */ 1274 err = usbd_get_string_desc(dev, USB_LANGUAGE_TABLE, 0, &us, 1275 &size); 1276 if (err || size < 4) { 1277 DPRINTFN(-1,("usbd_get_string: getting lang failed, using 0\n")); 1278 dev->langid = 0; /* Well, just pick something then */ 1279 } else { 1280 /* Pick the first language as the default. */ 1281 dev->langid = UGETW(us.bString[0]); 1282 } 1283 } 1284 err = usbd_get_string_desc(dev, si, dev->langid, &us, &size); 1285 if (err) 1286 return (err); 1287 s = buf; 1288 n = size / 2 - 1; 1289 if (unicode) { 1290 for (i = 0; i < n; i++) { 1291 c = UGETW(us.bString[i]); 1292 if (swap) 1293 c = (c >> 8) | (c << 8); 1294 s += wput_utf8(s, 3, c); 1295 } 1296 *s++ = 0; 1297 } 1298 #ifdef COMPAT_30 1299 else { 1300 for (i = 0; i < n; i++) { 1301 c = UGETW(us.bString[i]); 1302 if (swap) 1303 c = (c >> 8) | (c << 8); 1304 *s++ = (c < 0x80) ? c : '?'; 1305 } 1306 *s++ = 0; 1307 } 1308 #endif 1309 return (USBD_NORMAL_COMPLETION); 1310 } 1311
Indexes created Tue Sep 30 20:09:53 GMT 2025