usb.c revision 1.102
1 /* $NetBSD: usb.c,v 1.102 2007/12/01 05:12:48 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002 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. 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * USB specifications and other documentation can be found at 42 * http://www.usb.org/developers/docs/ and 43 * http://www.usb.org/developers/devclass_docs/ 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.102 2007/12/01 05:12:48 jmcneill Exp $"); 48 49 #include "opt_compat_netbsd.h" 50 51 #include "ohci.h" 52 #include "uhci.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/device.h> 59 #include <sys/kthread.h> 60 #include <sys/proc.h> 61 #include <sys/conf.h> 62 #include <sys/fcntl.h> 63 #include <sys/poll.h> 64 #include <sys/select.h> 65 #include <sys/vnode.h> 66 #include <sys/signalvar.h> 67 #include <sys/intr.h> 68 69 #include <dev/usb/usb.h> 70 #include <dev/usb/usbdi.h> 71 #include <dev/usb/usbdi_util.h> 72 73 #define USB_DEV_MINOR 255 74 75 #include <sys/bus.h> 76 77 #include <dev/usb/usbdivar.h> 78 #include <dev/usb/usb_quirks.h> 79 80 #ifdef USB_DEBUG 81 #define DPRINTF(x) if (usbdebug) logprintf x 82 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 83 int usbdebug = 0; 84 #if defined(UHCI_DEBUG) && NUHCI > 0 85 extern int uhcidebug; 86 #endif 87 #if defined(OHCI_DEBUG) && NOHCI > 0 88 extern int ohcidebug; 89 #endif 90 /* 91 * 0 - do usual exploration 92 * 1 - do not use timeout exploration 93 * >1 - do no exploration 94 */ 95 int usb_noexplore = 0; 96 #else 97 #define DPRINTF(x) 98 #define DPRINTFN(n,x) 99 #endif 100 101 struct usb_softc { 102 USBBASEDEVICE sc_dev; /* base device */ 103 usbd_bus_handle sc_bus; /* USB controller */ 104 struct usbd_port sc_port; /* dummy port for root hub */ 105 106 struct lwp *sc_event_thread; 107 108 char sc_dying; 109 }; 110 111 struct usb_taskq { 112 TAILQ_HEAD(, usb_task) tasks; 113 struct lwp *task_thread_lwp; 114 const char *name; 115 int taskcreated; /* task thread exists. */ 116 }; 117 118 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 119 120 dev_type_open(usbopen); 121 dev_type_close(usbclose); 122 dev_type_read(usbread); 123 dev_type_ioctl(usbioctl); 124 dev_type_poll(usbpoll); 125 dev_type_kqfilter(usbkqfilter); 126 127 const struct cdevsw usb_cdevsw = { 128 usbopen, usbclose, usbread, nowrite, usbioctl, 129 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 130 }; 131 132 Static void usb_discover(void *); 133 Static void usb_create_event_thread(void *); 134 Static void usb_event_thread(void *); 135 Static void usb_task_thread(void *); 136 137 #define USB_MAX_EVENTS 100 138 struct usb_event_q { 139 struct usb_event ue; 140 SIMPLEQ_ENTRY(usb_event_q) next; 141 }; 142 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 143 SIMPLEQ_HEAD_INITIALIZER(usb_events); 144 Static int usb_nevents = 0; 145 Static struct selinfo usb_selevent; 146 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 147 Static int usb_dev_open = 0; 148 Static struct usb_event *usb_alloc_event(void); 149 Static void usb_free_event(struct usb_event *); 150 Static void usb_add_event(int, struct usb_event *); 151 152 Static int usb_get_next_event(struct usb_event *); 153 154 #ifdef COMPAT_30 155 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 156 #endif 157 158 Static const char *usbrev_str[] = USBREV_STR; 159 160 USB_DECLARE_DRIVER(usb); 161 162 USB_MATCH(usb) 163 { 164 DPRINTF(("usbd_match\n")); 165 return (UMATCH_GENERIC); 166 } 167 168 USB_ATTACH(usb) 169 { 170 struct usb_softc *sc = (struct usb_softc *)self; 171 usbd_device_handle dev; 172 usbd_status err; 173 int usbrev; 174 int speed; 175 struct usb_event *ue; 176 177 DPRINTF(("usbd_attach\n")); 178 179 sc->sc_bus = aux; 180 sc->sc_bus->usbctl = sc; 181 sc->sc_port.power = USB_MAX_POWER; 182 183 usbrev = sc->sc_bus->usbrev; 184 aprint_naive("\n"); 185 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 186 switch (usbrev) { 187 case USBREV_1_0: 188 case USBREV_1_1: 189 speed = USB_SPEED_FULL; 190 break; 191 case USBREV_2_0: 192 speed = USB_SPEED_HIGH; 193 break; 194 default: 195 aprint_error(", not supported\n"); 196 sc->sc_dying = 1; 197 USB_ATTACH_ERROR_RETURN; 198 } 199 aprint_normal("\n"); 200 201 /* Make sure not to use tsleep() if we are cold booting. */ 202 if (cold) 203 sc->sc_bus->use_polling++; 204 205 ue = usb_alloc_event(); 206 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 207 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 208 209 #ifdef USB_USE_SOFTINTR 210 /* XXX we should have our own level */ 211 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 212 sc->sc_bus->methods->soft_intr, sc->sc_bus); 213 if (sc->sc_bus->soft == NULL) { 214 aprint_error("%s: can't register softintr\n", USBDEVNAME(sc->sc_dev)); 215 sc->sc_dying = 1; 216 USB_ATTACH_ERROR_RETURN; 217 } 218 #endif 219 220 err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, speed, 0, 221 &sc->sc_port); 222 if (!err) { 223 dev = sc->sc_port.device; 224 if (dev->hub == NULL) { 225 sc->sc_dying = 1; 226 aprint_error("%s: root device is not a hub\n", 227 USBDEVNAME(sc->sc_dev)); 228 USB_ATTACH_ERROR_RETURN; 229 } 230 sc->sc_bus->root_hub = dev; 231 #if 1 232 /* 233 * Turning this code off will delay attachment of USB devices 234 * until the USB event thread is running, which means that 235 * the keyboard will not work until after cold boot. 236 */ 237 if (cold && (device_cfdata(&sc->sc_dev)->cf_flags & 1)) 238 dev->hub->explore(sc->sc_bus->root_hub); 239 #endif 240 } else { 241 aprint_error("%s: root hub problem, error=%d\n", 242 USBDEVNAME(sc->sc_dev), err); 243 sc->sc_dying = 1; 244 } 245 if (cold) 246 sc->sc_bus->use_polling--; 247 248 config_pending_incr(); 249 usb_kthread_create(usb_create_event_thread, sc); 250 251 USB_ATTACH_SUCCESS_RETURN; 252 } 253 254 static const char *taskq_names[] = USB_TASKQ_NAMES; 255 256 #if defined(__NetBSD__) || defined(__OpenBSD__) 257 void 258 usb_create_event_thread(void *arg) 259 { 260 struct usb_softc *sc = arg; 261 struct usb_taskq *taskq; 262 int i; 263 264 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 265 &sc->sc_event_thread, "%s", sc->sc_dev.dv_xname)) { 266 printf("%s: unable to create event thread for\n", 267 sc->sc_dev.dv_xname); 268 panic("usb_create_event_thread"); 269 } 270 for (i = 0; i < USB_NUM_TASKQS; i++) { 271 taskq = &usb_taskq[i]; 272 273 if (taskq->taskcreated) 274 continue; 275 276 TAILQ_INIT(&taskq->tasks); 277 taskq->taskcreated = 1; 278 taskq->name = taskq_names[i]; 279 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 280 taskq, &taskq->task_thread_lwp, taskq->name)) { 281 printf("unable to create task thread: %s\n", taskq->name); 282 panic("usb_create_event_thread task"); 283 } 284 } 285 } 286 287 /* 288 * Add a task to be performed by the task thread. This function can be 289 * called from any context and the task will be executed in a process 290 * context ASAP. 291 */ 292 void 293 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 294 { 295 struct usb_taskq *taskq; 296 int s; 297 298 taskq = &usb_taskq[queue]; 299 s = splusb(); 300 if (task->queue == -1) { 301 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 302 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 303 task->queue = queue; 304 } else { 305 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 306 } 307 wakeup(&taskq->tasks); 308 splx(s); 309 } 310 311 void 312 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 313 { 314 struct usb_taskq *taskq; 315 int s; 316 317 taskq = &usb_taskq[task->queue]; 318 s = splusb(); 319 if (task->queue != -1) { 320 TAILQ_REMOVE(&taskq->tasks, task, next); 321 task->queue = -1; 322 } 323 splx(s); 324 } 325 326 void 327 usb_event_thread(void *arg) 328 { 329 struct usb_softc *sc = arg; 330 331 DPRINTF(("usb_event_thread: start\n")); 332 333 /* 334 * In case this controller is a companion controller to an 335 * EHCI controller we need to wait until the EHCI controller 336 * has grabbed the port. 337 * XXX It would be nicer to do this with a tsleep(), but I don't 338 * know how to synchronize the creation of the threads so it 339 * will work. 340 */ 341 usb_delay_ms(sc->sc_bus, 500); 342 343 /* Make sure first discover does something. */ 344 sc->sc_bus->needs_explore = 1; 345 usb_discover(sc); 346 config_pending_decr(); 347 348 while (!sc->sc_dying) { 349 #ifdef USB_DEBUG 350 if (usb_noexplore < 2) 351 #endif 352 usb_discover(sc); 353 #ifdef USB_DEBUG 354 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 355 usb_noexplore ? 0 : hz * 60); 356 #else 357 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 358 hz * 60); 359 #endif 360 DPRINTFN(2,("usb_event_thread: woke up\n")); 361 } 362 sc->sc_event_thread = NULL; 363 364 /* In case parent is waiting for us to exit. */ 365 wakeup(sc); 366 367 DPRINTF(("usb_event_thread: exit\n")); 368 kthread_exit(0); 369 } 370 371 void 372 usb_task_thread(void *arg) 373 { 374 struct usb_task *task; 375 struct usb_taskq *taskq; 376 int s; 377 378 taskq = arg; 379 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 380 381 s = splusb(); 382 for (;;) { 383 task = TAILQ_FIRST(&taskq->tasks); 384 if (task == NULL) { 385 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 386 task = TAILQ_FIRST(&taskq->tasks); 387 } 388 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 389 if (task != NULL) { 390 TAILQ_REMOVE(&taskq->tasks, task, next); 391 task->queue = -1; 392 splx(s); 393 task->fun(task->arg); 394 s = splusb(); 395 } 396 } 397 } 398 399 int 400 usbctlprint(void *aux, const char *pnp) 401 { 402 /* only "usb"es can attach to host controllers */ 403 if (pnp) 404 aprint_normal("usb at %s", pnp); 405 406 return (UNCONF); 407 } 408 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 409 410 int 411 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 412 { 413 int unit = minor(dev); 414 struct usb_softc *sc; 415 416 if (unit == USB_DEV_MINOR) { 417 if (usb_dev_open) 418 return (EBUSY); 419 usb_dev_open = 1; 420 usb_async_proc = 0; 421 return (0); 422 } 423 424 USB_GET_SC_OPEN(usb, unit, sc); 425 426 if (sc->sc_dying) 427 return (EIO); 428 429 return (0); 430 } 431 432 int 433 usbread(dev_t dev, struct uio *uio, int flag) 434 { 435 struct usb_event *ue; 436 #ifdef COMPAT_30 437 struct usb_event_old *ueo = NULL; /* XXXGCC */ 438 #endif 439 int s, error, n, useold; 440 441 if (minor(dev) != USB_DEV_MINOR) 442 return (ENXIO); 443 444 useold = 0; 445 switch (uio->uio_resid) { 446 #ifdef COMPAT_30 447 case sizeof(struct usb_event_old): 448 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 449 M_WAITOK|M_ZERO); 450 useold = 1; 451 /* FALLTHRU */ 452 #endif 453 case sizeof(struct usb_event): 454 ue = usb_alloc_event(); 455 break; 456 default: 457 return (EINVAL); 458 } 459 460 error = 0; 461 s = splusb(); 462 for (;;) { 463 n = usb_get_next_event(ue); 464 if (n != 0) 465 break; 466 if (flag & IO_NDELAY) { 467 error = EWOULDBLOCK; 468 break; 469 } 470 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 471 if (error) 472 break; 473 } 474 splx(s); 475 if (!error) { 476 #ifdef COMPAT_30 477 if (useold) { /* copy fields to old struct */ 478 ueo->ue_type = ue->ue_type; 479 memcpy(&ueo->ue_time, &ue->ue_time, 480 sizeof(struct timespec)); 481 switch (ue->ue_type) { 482 case USB_EVENT_DEVICE_ATTACH: 483 case USB_EVENT_DEVICE_DETACH: 484 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 485 break; 486 487 case USB_EVENT_CTRLR_ATTACH: 488 case USB_EVENT_CTRLR_DETACH: 489 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 490 break; 491 492 case USB_EVENT_DRIVER_ATTACH: 493 case USB_EVENT_DRIVER_DETACH: 494 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 495 memcpy(ueo->u.ue_driver.ue_devname, 496 ue->u.ue_driver.ue_devname, 497 sizeof(ue->u.ue_driver.ue_devname)); 498 break; 499 default: 500 ; 501 } 502 503 error = uiomove((void *)ueo, uio->uio_resid, uio); 504 } else 505 #endif 506 error = uiomove((void *)ue, uio->uio_resid, uio); 507 } 508 usb_free_event(ue); 509 #ifdef COMPAT_30 510 if (useold) 511 free(ueo, M_USBDEV); 512 #endif 513 514 return (error); 515 } 516 517 int 518 usbclose(dev_t dev, int flag, int mode, 519 struct lwp *l) 520 { 521 int unit = minor(dev); 522 523 if (unit == USB_DEV_MINOR) { 524 usb_async_proc = 0; 525 usb_dev_open = 0; 526 } 527 528 return (0); 529 } 530 531 int 532 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 533 { 534 struct usb_softc *sc; 535 int unit = minor(devt); 536 537 if (unit == USB_DEV_MINOR) { 538 switch (cmd) { 539 case FIONBIO: 540 /* All handled in the upper FS layer. */ 541 return (0); 542 543 case FIOASYNC: 544 if (*(int *)data) 545 usb_async_proc = l->l_proc; 546 else 547 usb_async_proc = 0; 548 return (0); 549 550 default: 551 return (EINVAL); 552 } 553 } 554 555 USB_GET_SC(usb, unit, sc); 556 557 if (sc->sc_dying) 558 return (EIO); 559 560 switch (cmd) { 561 #ifdef USB_DEBUG 562 case USB_SETDEBUG: 563 if (!(flag & FWRITE)) 564 return (EBADF); 565 usbdebug = ((*(int *)data) & 0x000000ff); 566 #if defined(UHCI_DEBUG) && NUHCI > 0 567 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 568 #endif 569 #if defined(OHCI_DEBUG) && NOHCI > 0 570 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 571 #endif 572 break; 573 #endif /* USB_DEBUG */ 574 case USB_REQUEST: 575 { 576 struct usb_ctl_request *ur = (void *)data; 577 int len = UGETW(ur->ucr_request.wLength); 578 struct iovec iov; 579 struct uio uio; 580 void *ptr = 0; 581 int addr = ur->ucr_addr; 582 usbd_status err; 583 int error = 0; 584 585 if (!(flag & FWRITE)) 586 return (EBADF); 587 588 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 589 if (len < 0 || len > 32768) 590 return (EINVAL); 591 if (addr < 0 || addr >= USB_MAX_DEVICES || 592 sc->sc_bus->devices[addr] == 0) 593 return (EINVAL); 594 if (len != 0) { 595 iov.iov_base = (void *)ur->ucr_data; 596 iov.iov_len = len; 597 uio.uio_iov = &iov; 598 uio.uio_iovcnt = 1; 599 uio.uio_resid = len; 600 uio.uio_offset = 0; 601 uio.uio_rw = 602 ur->ucr_request.bmRequestType & UT_READ ? 603 UIO_READ : UIO_WRITE; 604 uio.uio_vmspace = l->l_proc->p_vmspace; 605 ptr = malloc(len, M_TEMP, M_WAITOK); 606 if (uio.uio_rw == UIO_WRITE) { 607 error = uiomove(ptr, len, &uio); 608 if (error) 609 goto ret; 610 } 611 } 612 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 613 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 614 USBD_DEFAULT_TIMEOUT); 615 if (err) { 616 error = EIO; 617 goto ret; 618 } 619 if (len != 0) { 620 if (uio.uio_rw == UIO_READ) { 621 error = uiomove(ptr, len, &uio); 622 if (error) 623 goto ret; 624 } 625 } 626 ret: 627 if (ptr) 628 free(ptr, M_TEMP); 629 return (error); 630 } 631 632 case USB_DEVICEINFO: 633 { 634 usbd_device_handle dev; 635 struct usb_device_info *di = (void *)data; 636 int addr = di->udi_addr; 637 638 if (addr < 1 || addr >= USB_MAX_DEVICES) 639 return EINVAL; 640 if ((dev = sc->sc_bus->devices[addr]) == NULL) 641 return ENXIO; 642 usbd_fill_deviceinfo(dev, di, 1); 643 break; 644 } 645 646 #ifdef COMPAT_30 647 case USB_DEVICEINFO_OLD: 648 { 649 usbd_device_handle dev; 650 struct usb_device_info_old *di = (void *)data; 651 int addr = di->udi_addr; 652 653 if (addr < 1 || addr >= USB_MAX_DEVICES) 654 return EINVAL; 655 if ((dev = sc->sc_bus->devices[addr]) == NULL) 656 return ENXIO; 657 usbd_fill_deviceinfo_old(dev, di, 1); 658 break; 659 } 660 #endif 661 662 case USB_DEVICESTATS: 663 *(struct usb_device_stats *)data = sc->sc_bus->stats; 664 break; 665 666 default: 667 return (EINVAL); 668 } 669 return (0); 670 } 671 672 int 673 usbpoll(dev_t dev, int events, struct lwp *l) 674 { 675 int revents, mask, s; 676 677 if (minor(dev) == USB_DEV_MINOR) { 678 revents = 0; 679 mask = POLLIN | POLLRDNORM; 680 681 s = splusb(); 682 if (events & mask && usb_nevents > 0) 683 revents |= events & mask; 684 if (revents == 0 && events & mask) 685 selrecord(l, &usb_selevent); 686 splx(s); 687 688 return (revents); 689 } else { 690 return (0); 691 } 692 } 693 694 static void 695 filt_usbrdetach(struct knote *kn) 696 { 697 int s; 698 699 s = splusb(); 700 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 701 splx(s); 702 } 703 704 static int 705 filt_usbread(struct knote *kn, long hint) 706 { 707 708 if (usb_nevents == 0) 709 return (0); 710 711 kn->kn_data = sizeof(struct usb_event); 712 return (1); 713 } 714 715 static const struct filterops usbread_filtops = 716 { 1, NULL, filt_usbrdetach, filt_usbread }; 717 718 int 719 usbkqfilter(dev_t dev, struct knote *kn) 720 { 721 struct klist *klist; 722 int s; 723 724 switch (kn->kn_filter) { 725 case EVFILT_READ: 726 if (minor(dev) != USB_DEV_MINOR) 727 return (1); 728 klist = &usb_selevent.sel_klist; 729 kn->kn_fop = &usbread_filtops; 730 break; 731 732 default: 733 return (1); 734 } 735 736 kn->kn_hook = NULL; 737 738 s = splusb(); 739 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 740 splx(s); 741 742 return (0); 743 } 744 745 /* Explore device tree from the root. */ 746 Static void 747 usb_discover(void *v) 748 { 749 struct usb_softc *sc = v; 750 751 DPRINTFN(2,("usb_discover\n")); 752 #ifdef USB_DEBUG 753 if (usb_noexplore > 1) 754 return; 755 #endif 756 /* 757 * We need mutual exclusion while traversing the device tree, 758 * but this is guaranteed since this function is only called 759 * from the event thread for the controller. 760 */ 761 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 762 sc->sc_bus->needs_explore = 0; 763 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 764 } 765 } 766 767 void 768 usb_needs_explore(usbd_device_handle dev) 769 { 770 DPRINTFN(2,("usb_needs_explore\n")); 771 dev->bus->needs_explore = 1; 772 wakeup(&dev->bus->needs_explore); 773 } 774 775 void 776 usb_needs_reattach(usbd_device_handle dev) 777 { 778 DPRINTFN(2,("usb_needs_reattach\n")); 779 dev->powersrc->reattach = 1; 780 dev->bus->needs_explore = 1; 781 wakeup(&dev->bus->needs_explore); 782 } 783 784 /* Called at splusb() */ 785 int 786 usb_get_next_event(struct usb_event *ue) 787 { 788 struct usb_event_q *ueq; 789 790 if (usb_nevents <= 0) 791 return (0); 792 ueq = SIMPLEQ_FIRST(&usb_events); 793 #ifdef DIAGNOSTIC 794 if (ueq == NULL) { 795 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 796 usb_nevents = 0; 797 return (0); 798 } 799 #endif 800 if (ue) 801 *ue = ueq->ue; 802 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 803 usb_free_event((struct usb_event *)(void *)ueq); 804 usb_nevents--; 805 return (1); 806 } 807 808 void 809 usbd_add_dev_event(int type, usbd_device_handle udev) 810 { 811 struct usb_event *ue = usb_alloc_event(); 812 813 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 814 usb_add_event(type, ue); 815 } 816 817 void 818 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 819 { 820 struct usb_event *ue = usb_alloc_event(); 821 822 ue->u.ue_driver.ue_cookie = udev->cookie; 823 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 824 sizeof ue->u.ue_driver.ue_devname); 825 usb_add_event(type, ue); 826 } 827 828 Static struct usb_event * 829 usb_alloc_event(void) 830 { 831 /* Yes, this is right; we allocate enough so that we can use it later */ 832 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 833 } 834 835 Static void 836 usb_free_event(struct usb_event *uep) 837 { 838 free(uep, M_USBDEV); 839 } 840 841 Static void 842 usb_add_event(int type, struct usb_event *uep) 843 { 844 struct usb_event_q *ueq; 845 struct timeval thetime; 846 int s; 847 848 microtime(&thetime); 849 /* Don't want to wait here inside splusb() */ 850 ueq = (struct usb_event_q *)(void *)uep; 851 ueq->ue = *uep; 852 ueq->ue.ue_type = type; 853 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 854 855 s = splusb(); 856 if (++usb_nevents >= USB_MAX_EVENTS) { 857 /* Too many queued events, drop an old one. */ 858 DPRINTFN(-1,("usb: event dropped\n")); 859 (void)usb_get_next_event(0); 860 } 861 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 862 wakeup(&usb_events); 863 selnotify(&usb_selevent, 0); 864 if (usb_async_proc != NULL) { 865 mutex_enter(&proclist_mutex); 866 psignal(usb_async_proc, SIGIO); 867 mutex_exit(&proclist_mutex); 868 } 869 splx(s); 870 } 871 872 void 873 usb_schedsoftintr(usbd_bus_handle bus) 874 { 875 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 876 #ifdef USB_USE_SOFTINTR 877 if (bus->use_polling) { 878 bus->methods->soft_intr(bus); 879 } else { 880 softint_schedule(bus->soft); 881 } 882 #else 883 bus->methods->soft_intr(bus); 884 #endif /* USB_USE_SOFTINTR */ 885 } 886 887 int 888 usb_activate(device_ptr_t self, enum devact act) 889 { 890 struct usb_softc *sc = (struct usb_softc *)self; 891 usbd_device_handle dev = sc->sc_port.device; 892 int i, rv = 0; 893 894 switch (act) { 895 case DVACT_ACTIVATE: 896 return (EOPNOTSUPP); 897 898 case DVACT_DEACTIVATE: 899 sc->sc_dying = 1; 900 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 901 for (i = 0; dev->subdevs[i]; i++) 902 rv |= config_deactivate(dev->subdevs[i]); 903 } 904 break; 905 } 906 return (rv); 907 } 908 909 int 910 usb_detach(device_ptr_t self, int flags) 911 { 912 struct usb_softc *sc = (struct usb_softc *)self; 913 struct usb_event *ue; 914 915 DPRINTF(("usb_detach: start\n")); 916 917 /* Kill off event thread. */ 918 while (sc->sc_event_thread != NULL) { 919 wakeup(&sc->sc_bus->needs_explore); 920 tsleep(sc, PWAIT, "usbdet", hz * 60); 921 } 922 DPRINTF(("usb_detach: event thread dead\n")); 923 924 /* Make all devices disconnect. */ 925 if (sc->sc_port.device != NULL) 926 usb_disconnect_port(&sc->sc_port, self); 927 928 #ifdef USB_USE_SOFTINTR 929 if (sc->sc_bus->soft != NULL) { 930 softint_disestablish(sc->sc_bus->soft); 931 sc->sc_bus->soft = NULL; 932 } 933 #endif 934 935 ue = usb_alloc_event(); 936 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 937 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 938 939 return (0); 940 } 941 942 #ifdef COMPAT_30 943 Static void 944 usb_copy_old_devinfo(struct usb_device_info_old *uo, 945 const struct usb_device_info *ue) 946 { 947 const unsigned char *p; 948 unsigned char *q; 949 int i, n; 950 951 uo->udi_bus = ue->udi_bus; 952 uo->udi_addr = ue->udi_addr; 953 uo->udi_cookie = ue->udi_cookie; 954 for (i = 0, p = (const unsigned char *)ue->udi_product, 955 q = (unsigned char *)uo->udi_product; 956 *p && i < USB_MAX_STRING_LEN - 1; p++) { 957 if (*p < 0x80) 958 q[i++] = *p; 959 else { 960 q[i++] = '?'; 961 if ((*p & 0xe0) == 0xe0) 962 p++; 963 p++; 964 } 965 } 966 q[i] = 0; 967 968 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 969 *p && i < USB_MAX_STRING_LEN - 1; p++) { 970 if (* p < 0x80) 971 q[i++] = *p; 972 else { 973 q[i++] = '?'; 974 p++; 975 if ((*p & 0xe0) == 0xe0) 976 p++; 977 } 978 } 979 q[i] = 0; 980 981 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 982 983 uo->udi_productNo = ue->udi_productNo; 984 uo->udi_vendorNo = ue->udi_vendorNo; 985 uo->udi_releaseNo = ue->udi_releaseNo; 986 uo->udi_class = ue->udi_class; 987 uo->udi_subclass = ue->udi_subclass; 988 uo->udi_protocol = ue->udi_protocol; 989 uo->udi_config = ue->udi_config; 990 uo->udi_speed = ue->udi_speed; 991 uo->udi_power = ue->udi_power; 992 uo->udi_nports = ue->udi_nports; 993 994 for (n=0; n<USB_MAX_DEVNAMES; n++) 995 memcpy(uo->udi_devnames[n], 996 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 997 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 998 } 999 #endif 1000
Indexes created Wed Sep 24 15:09:51 GMT 2025