1 /* $NetBSD: usb.c,v 1.91 2006/11/16 01:33:27 christos 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@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 1.91 2006/11/16 01:33:27 christos Exp $"); 48 49 #include "ohci.h" 50 #include "uhci.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/malloc.h> 56 #include <sys/device.h> 57 #include <sys/kthread.h> 58 #include <sys/proc.h> 59 #include <sys/conf.h> 60 #include <sys/fcntl.h> 61 #include <sys/poll.h> 62 #include <sys/select.h> 63 #include <sys/vnode.h> 64 #include <sys/signalvar.h> 65 66 #include <dev/usb/usb.h> 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 70 #define USB_DEV_MINOR 255 71 72 #include <machine/bus.h> 73 74 #include <dev/usb/usbdivar.h> 75 #include <dev/usb/usb_quirks.h> 76 77 #ifdef USB_DEBUG 78 #define DPRINTF(x) if (usbdebug) logprintf x 79 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 80 int usbdebug = 0; 81 #if defined(UHCI_DEBUG) && NUHCI > 0 82 extern int uhcidebug; 83 #endif 84 #if defined(OHCI_DEBUG) && NOHCI > 0 85 extern int ohcidebug; 86 #endif 87 /* 88 * 0 - do usual exploration 89 * 1 - do not use timeout exploration 90 * >1 - do no exploration 91 */ 92 int usb_noexplore = 0; 93 #else 94 #define DPRINTF(x) 95 #define DPRINTFN(n,x) 96 #endif 97 98 struct usb_softc { 99 USBBASEDEVICE sc_dev; /* base device */ 100 usbd_bus_handle sc_bus; /* USB controller */ 101 struct usbd_port sc_port; /* dummy port for root hub */ 102 103 struct proc *sc_event_thread; 104 105 char sc_dying; 106 }; 107 108 struct usb_taskq { 109 TAILQ_HEAD(, usb_task) tasks; 110 struct proc *task_thread_proc; 111 const char *name; 112 int taskcreated; /* task thread exists. */ 113 }; 114 115 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 116 117 dev_type_open(usbopen); 118 dev_type_close(usbclose); 119 dev_type_read(usbread); 120 dev_type_ioctl(usbioctl); 121 dev_type_poll(usbpoll); 122 dev_type_kqfilter(usbkqfilter); 123 124 const struct cdevsw usb_cdevsw = { 125 usbopen, usbclose, usbread, nowrite, usbioctl, 126 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 127 }; 128 129 Static void usb_discover(void *); 130 Static void usb_create_event_thread(void *); 131 Static void usb_event_thread(void *); 132 Static void usb_task_thread(void *); 133 134 #define USB_MAX_EVENTS 100 135 struct usb_event_q { 136 struct usb_event ue; 137 SIMPLEQ_ENTRY(usb_event_q) next; 138 }; 139 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 140 SIMPLEQ_HEAD_INITIALIZER(usb_events); 141 Static int usb_nevents = 0; 142 Static struct selinfo usb_selevent; 143 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 144 Static int usb_dev_open = 0; 145 Static struct usb_event *usb_alloc_event(void); 146 Static void usb_free_event(struct usb_event *); 147 Static void usb_add_event(int, struct usb_event *); 148 149 Static int usb_get_next_event(struct usb_event *); 150 151 Static const char *usbrev_str[] = USBREV_STR; 152 153 USB_DECLARE_DRIVER(usb); 154 155 USB_MATCH(usb) 156 { 157 DPRINTF(("usbd_match\n")); 158 return (UMATCH_GENERIC); 159 } 160 161 USB_ATTACH(usb) 162 { 163 struct usb_softc *sc = (struct usb_softc *)self; 164 usbd_device_handle dev; 165 usbd_status err; 166 int usbrev; 167 int speed; 168 struct usb_event *ue; 169 170 DPRINTF(("usbd_attach\n")); 171 172 usbd_init(); 173 sc->sc_bus = aux; 174 sc->sc_bus->usbctl = sc; 175 sc->sc_port.power = USB_MAX_POWER; 176 177 usbrev = sc->sc_bus->usbrev; 178 printf(": USB revision %s", usbrev_str[usbrev]); 179 switch (usbrev) { 180 case USBREV_1_0: 181 case USBREV_1_1: 182 speed = USB_SPEED_FULL; 183 break; 184 case USBREV_2_0: 185 speed = USB_SPEED_HIGH; 186 break; 187 default: 188 printf(", not supported\n"); 189 sc->sc_dying = 1; 190 USB_ATTACH_ERROR_RETURN; 191 } 192 printf("\n"); 193 194 /* Make sure not to use tsleep() if we are cold booting. */ 195 if (cold) 196 sc->sc_bus->use_polling++; 197 198 ue = usb_alloc_event(); 199 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 200 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 201 202 #ifdef USB_USE_SOFTINTR 203 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 204 /* XXX we should have our own level */ 205 sc->sc_bus->soft = softintr_establish(IPL_SOFTNET, 206 sc->sc_bus->methods->soft_intr, sc->sc_bus); 207 if (sc->sc_bus->soft == NULL) { 208 printf("%s: can't register softintr\n", USBDEVNAME(sc->sc_dev)); 209 sc->sc_dying = 1; 210 USB_ATTACH_ERROR_RETURN; 211 } 212 #else 213 usb_callout_init(sc->sc_bus->softi); 214 #endif 215 #endif 216 217 err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, speed, 0, 218 &sc->sc_port); 219 if (!err) { 220 dev = sc->sc_port.device; 221 if (dev->hub == NULL) { 222 sc->sc_dying = 1; 223 printf("%s: root device is not a hub\n", 224 USBDEVNAME(sc->sc_dev)); 225 USB_ATTACH_ERROR_RETURN; 226 } 227 sc->sc_bus->root_hub = dev; 228 #if 1 229 /* 230 * Turning this code off will delay attachment of USB devices 231 * until the USB event thread is running, which means that 232 * the keyboard will not work until after cold boot. 233 */ 234 if (cold && (device_cfdata(&sc->sc_dev)->cf_flags & 1)) 235 dev->hub->explore(sc->sc_bus->root_hub); 236 #endif 237 } else { 238 printf("%s: root hub problem, error=%d\n", 239 USBDEVNAME(sc->sc_dev), err); 240 sc->sc_dying = 1; 241 } 242 if (cold) 243 sc->sc_bus->use_polling--; 244 245 config_pending_incr(); 246 usb_kthread_create(usb_create_event_thread, sc); 247 248 USB_ATTACH_SUCCESS_RETURN; 249 } 250 251 static const char *taskq_names[] = USB_TASKQ_NAMES; 252 253 #if defined(__NetBSD__) || defined(__OpenBSD__) 254 void 255 usb_create_event_thread(void *arg) 256 { 257 struct usb_softc *sc = arg; 258 struct usb_taskq *taskq; 259 int i; 260 261 if (usb_kthread_create1(usb_event_thread, sc, &sc->sc_event_thread, 262 "%s", sc->sc_dev.dv_xname)) { 263 printf("%s: unable to create event thread for\n", 264 sc->sc_dev.dv_xname); 265 panic("usb_create_event_thread"); 266 } 267 for (i = 0; i < USB_NUM_TASKQS; i++) { 268 taskq = &usb_taskq[i]; 269 270 if (taskq->taskcreated) 271 continue; 272 273 TAILQ_INIT(&taskq->tasks); 274 taskq->taskcreated = 1; 275 taskq->name = taskq_names[i]; 276 if (usb_kthread_create1(usb_task_thread, taskq, 277 &taskq->task_thread_proc, taskq->name)) { 278 printf("unable to create task thread: %s\n", taskq->name); 279 panic("usb_create_event_thread task"); 280 } 281 } 282 } 283 284 /* 285 * Add a task to be performed by the task thread. This function can be 286 * called from any context and the task will be executed in a process 287 * context ASAP. 288 */ 289 void 290 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 291 { 292 struct usb_taskq *taskq; 293 int s; 294 295 taskq = &usb_taskq[queue]; 296 s = splusb(); 297 if (task->queue == -1) { 298 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 299 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 300 task->queue = queue; 301 } else { 302 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 303 } 304 wakeup(&taskq->tasks); 305 splx(s); 306 } 307 308 void 309 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 310 { 311 struct usb_taskq *taskq; 312 int s; 313 314 taskq = &usb_taskq[task->queue]; 315 s = splusb(); 316 if (task->queue != -1) { 317 TAILQ_REMOVE(&taskq->tasks, task, next); 318 task->queue = -1; 319 } 320 splx(s); 321 } 322 323 void 324 usb_event_thread(void *arg) 325 { 326 struct usb_softc *sc = arg; 327 328 DPRINTF(("usb_event_thread: start\n")); 329 330 /* 331 * In case this controller is a companion controller to an 332 * EHCI controller we need to wait until the EHCI controller 333 * has grabbed the port. 334 * XXX It would be nicer to do this with a tsleep(), but I don't 335 * know how to synchronize the creation of the threads so it 336 * will work. 337 */ 338 usb_delay_ms(sc->sc_bus, 500); 339 340 /* Make sure first discover does something. */ 341 sc->sc_bus->needs_explore = 1; 342 usb_discover(sc); 343 config_pending_decr(); 344 345 while (!sc->sc_dying) { 346 #ifdef USB_DEBUG 347 if (usb_noexplore < 2) 348 #endif 349 usb_discover(sc); 350 #ifdef USB_DEBUG 351 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 352 usb_noexplore ? 0 : hz * 60); 353 #else 354 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 355 hz * 60); 356 #endif 357 DPRINTFN(2,("usb_event_thread: woke up\n")); 358 } 359 sc->sc_event_thread = NULL; 360 361 /* In case parent is waiting for us to exit. */ 362 wakeup(sc); 363 364 DPRINTF(("usb_event_thread: exit\n")); 365 kthread_exit(0); 366 } 367 368 void 369 usb_task_thread(void *arg) 370 { 371 struct usb_task *task; 372 struct usb_taskq *taskq; 373 int s; 374 375 taskq = arg; 376 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 377 378 s = splusb(); 379 for (;;) { 380 task = TAILQ_FIRST(&taskq->tasks); 381 if (task == NULL) { 382 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 383 task = TAILQ_FIRST(&taskq->tasks); 384 } 385 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 386 if (task != NULL) { 387 TAILQ_REMOVE(&taskq->tasks, task, next); 388 task->queue = -1; 389 splx(s); 390 task->fun(task->arg); 391 s = splusb(); 392 } 393 } 394 } 395 396 int 397 usbctlprint(void *aux, const char *pnp) 398 { 399 /* only "usb"es can attach to host controllers */ 400 if (pnp) 401 aprint_normal("usb at %s", pnp); 402 403 return (UNCONF); 404 } 405 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 406 407 int 408 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 409 { 410 int unit = minor(dev); 411 struct usb_softc *sc; 412 413 if (unit == USB_DEV_MINOR) { 414 if (usb_dev_open) 415 return (EBUSY); 416 usb_dev_open = 1; 417 usb_async_proc = 0; 418 return (0); 419 } 420 421 USB_GET_SC_OPEN(usb, unit, sc); 422 423 if (sc->sc_dying) 424 return (EIO); 425 426 return (0); 427 } 428 429 int 430 usbread(dev_t dev, struct uio *uio, int flag) 431 { 432 struct usb_event *ue = usb_alloc_event(); 433 int s, error, n; 434 435 if (minor(dev) != USB_DEV_MINOR) 436 return (ENXIO); 437 438 if (uio->uio_resid != sizeof(struct usb_event)) 439 return (EINVAL); 440 441 error = 0; 442 s = splusb(); 443 for (;;) { 444 n = usb_get_next_event(ue); 445 if (n != 0) 446 break; 447 if (flag & IO_NDELAY) { 448 error = EWOULDBLOCK; 449 break; 450 } 451 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 452 if (error) 453 break; 454 } 455 splx(s); 456 if (!error) 457 error = uiomove((void *)ue, uio->uio_resid, uio); 458 usb_free_event(ue); 459 460 return (error); 461 } 462 463 int 464 usbclose(dev_t dev, int flag, int mode, 465 struct lwp *l) 466 { 467 int unit = minor(dev); 468 469 if (unit == USB_DEV_MINOR) { 470 usb_async_proc = 0; 471 usb_dev_open = 0; 472 } 473 474 return (0); 475 } 476 477 int 478 usbioctl(dev_t devt, u_long cmd, caddr_t data, int flag, struct lwp *l) 479 { 480 struct usb_softc *sc; 481 int unit = minor(devt); 482 483 if (unit == USB_DEV_MINOR) { 484 switch (cmd) { 485 case FIONBIO: 486 /* All handled in the upper FS layer. */ 487 return (0); 488 489 case FIOASYNC: 490 if (*(int *)data) 491 usb_async_proc = l->l_proc; 492 else 493 usb_async_proc = 0; 494 return (0); 495 496 default: 497 return (EINVAL); 498 } 499 } 500 501 USB_GET_SC(usb, unit, sc); 502 503 if (sc->sc_dying) 504 return (EIO); 505 506 switch (cmd) { 507 #ifdef USB_DEBUG 508 case USB_SETDEBUG: 509 if (!(flag & FWRITE)) 510 return (EBADF); 511 usbdebug = ((*(int *)data) & 0x000000ff); 512 #if defined(UHCI_DEBUG) && NUHCI > 0 513 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 514 #endif 515 #if defined(OHCI_DEBUG) && NOHCI > 0 516 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 517 #endif 518 break; 519 #endif /* USB_DEBUG */ 520 case USB_REQUEST: 521 { 522 struct usb_ctl_request *ur = (void *)data; 523 int len = UGETW(ur->ucr_request.wLength); 524 struct iovec iov; 525 struct uio uio; 526 void *ptr = 0; 527 int addr = ur->ucr_addr; 528 usbd_status err; 529 int error = 0; 530 531 if (!(flag & FWRITE)) 532 return (EBADF); 533 534 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 535 if (len < 0 || len > 32768) 536 return (EINVAL); 537 if (addr < 0 || addr >= USB_MAX_DEVICES || 538 sc->sc_bus->devices[addr] == 0) 539 return (EINVAL); 540 if (len != 0) { 541 iov.iov_base = (caddr_t)ur->ucr_data; 542 iov.iov_len = len; 543 uio.uio_iov = &iov; 544 uio.uio_iovcnt = 1; 545 uio.uio_resid = len; 546 uio.uio_offset = 0; 547 uio.uio_rw = 548 ur->ucr_request.bmRequestType & UT_READ ? 549 UIO_READ : UIO_WRITE; 550 uio.uio_vmspace = l->l_proc->p_vmspace; 551 ptr = malloc(len, M_TEMP, M_WAITOK); 552 if (uio.uio_rw == UIO_WRITE) { 553 error = uiomove(ptr, len, &uio); 554 if (error) 555 goto ret; 556 } 557 } 558 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 559 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 560 USBD_DEFAULT_TIMEOUT); 561 if (err) { 562 error = EIO; 563 goto ret; 564 } 565 if (len != 0) { 566 if (uio.uio_rw == UIO_READ) { 567 error = uiomove(ptr, len, &uio); 568 if (error) 569 goto ret; 570 } 571 } 572 ret: 573 if (ptr) 574 free(ptr, M_TEMP); 575 return (error); 576 } 577 578 case USB_DEVICEINFO: 579 { 580 struct usb_device_info *di = (void *)data; 581 int addr = di->udi_addr; 582 usbd_device_handle dev; 583 584 if (addr < 1 || addr >= USB_MAX_DEVICES) 585 return (EINVAL); 586 dev = sc->sc_bus->devices[addr]; 587 if (dev == NULL) 588 return (ENXIO); 589 usbd_fill_deviceinfo(dev, di, 1); 590 break; 591 } 592 593 case USB_DEVICESTATS: 594 *(struct usb_device_stats *)data = sc->sc_bus->stats; 595 break; 596 597 default: 598 return (EINVAL); 599 } 600 return (0); 601 } 602 603 int 604 usbpoll(dev_t dev, int events, struct lwp *l) 605 { 606 int revents, mask, s; 607 608 if (minor(dev) == USB_DEV_MINOR) { 609 revents = 0; 610 mask = POLLIN | POLLRDNORM; 611 612 s = splusb(); 613 if (events & mask && usb_nevents > 0) 614 revents |= events & mask; 615 if (revents == 0 && events & mask) 616 selrecord(l, &usb_selevent); 617 splx(s); 618 619 return (revents); 620 } else { 621 return (0); 622 } 623 } 624 625 static void 626 filt_usbrdetach(struct knote *kn) 627 { 628 int s; 629 630 s = splusb(); 631 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 632 splx(s); 633 } 634 635 static int 636 filt_usbread(struct knote *kn, long hint) 637 { 638 639 if (usb_nevents == 0) 640 return (0); 641 642 kn->kn_data = sizeof(struct usb_event); 643 return (1); 644 } 645 646 static const struct filterops usbread_filtops = 647 { 1, NULL, filt_usbrdetach, filt_usbread }; 648 649 int 650 usbkqfilter(dev_t dev, struct knote *kn) 651 { 652 struct klist *klist; 653 int s; 654 655 switch (kn->kn_filter) { 656 case EVFILT_READ: 657 if (minor(dev) != USB_DEV_MINOR) 658 return (1); 659 klist = &usb_selevent.sel_klist; 660 kn->kn_fop = &usbread_filtops; 661 break; 662 663 default: 664 return (1); 665 } 666 667 kn->kn_hook = NULL; 668 669 s = splusb(); 670 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 671 splx(s); 672 673 return (0); 674 } 675 676 /* Explore device tree from the root. */ 677 Static void 678 usb_discover(void *v) 679 { 680 struct usb_softc *sc = v; 681 682 DPRINTFN(2,("usb_discover\n")); 683 #ifdef USB_DEBUG 684 if (usb_noexplore > 1) 685 return; 686 #endif 687 /* 688 * We need mutual exclusion while traversing the device tree, 689 * but this is guaranteed since this function is only called 690 * from the event thread for the controller. 691 */ 692 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 693 sc->sc_bus->needs_explore = 0; 694 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 695 } 696 } 697 698 void 699 usb_needs_explore(usbd_device_handle dev) 700 { 701 DPRINTFN(2,("usb_needs_explore\n")); 702 dev->bus->needs_explore = 1; 703 wakeup(&dev->bus->needs_explore); 704 } 705 706 void 707 usb_needs_reattach(usbd_device_handle dev) 708 { 709 DPRINTFN(2,("usb_needs_reattach\n")); 710 dev->powersrc->reattach = 1; 711 dev->bus->needs_explore = 1; 712 wakeup(&dev->bus->needs_explore); 713 } 714 715 /* Called at splusb() */ 716 int 717 usb_get_next_event(struct usb_event *ue) 718 { 719 struct usb_event_q *ueq; 720 721 if (usb_nevents <= 0) 722 return (0); 723 ueq = SIMPLEQ_FIRST(&usb_events); 724 #ifdef DIAGNOSTIC 725 if (ueq == NULL) { 726 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 727 usb_nevents = 0; 728 return (0); 729 } 730 #endif 731 if (ue) 732 *ue = ueq->ue; 733 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 734 usb_free_event((struct usb_event *)(void *)ueq); 735 usb_nevents--; 736 return (1); 737 } 738 739 void 740 usbd_add_dev_event(int type, usbd_device_handle udev) 741 { 742 struct usb_event *ue = usb_alloc_event(); 743 744 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 745 usb_add_event(type, ue); 746 } 747 748 void 749 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 750 { 751 struct usb_event *ue = usb_alloc_event(); 752 753 ue->u.ue_driver.ue_cookie = udev->cookie; 754 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 755 sizeof ue->u.ue_driver.ue_devname); 756 usb_add_event(type, ue); 757 } 758 759 Static struct usb_event * 760 usb_alloc_event(void) 761 { 762 /* Yes, this is right; we allocate enough so that we can use it later */ 763 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 764 } 765 766 Static void 767 usb_free_event(struct usb_event *uep) 768 { 769 free(uep, M_USBDEV); 770 } 771 772 Static void 773 usb_add_event(int type, struct usb_event *uep) 774 { 775 struct usb_event_q *ueq; 776 struct timeval thetime; 777 int s; 778 779 microtime(&thetime); 780 /* Don't want to wait here inside splusb() */ 781 ueq = (struct usb_event_q *)(void *)uep; 782 ueq->ue = *uep; 783 ueq->ue.ue_type = type; 784 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 785 786 s = splusb(); 787 if (++usb_nevents >= USB_MAX_EVENTS) { 788 /* Too many queued events, drop an old one. */ 789 DPRINTFN(-1,("usb: event dropped\n")); 790 (void)usb_get_next_event(0); 791 } 792 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 793 wakeup(&usb_events); 794 selnotify(&usb_selevent, 0); 795 if (usb_async_proc != NULL) 796 psignal(usb_async_proc, SIGIO); 797 splx(s); 798 } 799 800 void 801 usb_schedsoftintr(usbd_bus_handle bus) 802 { 803 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 804 #ifdef USB_USE_SOFTINTR 805 if (bus->use_polling) { 806 bus->methods->soft_intr(bus); 807 } else { 808 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 809 softintr_schedule(bus->soft); 810 #else 811 if (!callout_pending(&bus->softi)) 812 callout_reset(&bus->softi, 0, bus->methods->soft_intr, 813 bus); 814 #endif /* __HAVE_GENERIC_SOFT_INTERRUPTS */ 815 } 816 #else 817 bus->methods->soft_intr(bus); 818 #endif /* USB_USE_SOFTINTR */ 819 } 820 821 int 822 usb_activate(device_ptr_t self, enum devact act) 823 { 824 struct usb_softc *sc = (struct usb_softc *)self; 825 usbd_device_handle dev = sc->sc_port.device; 826 int i, rv = 0; 827 828 switch (act) { 829 case DVACT_ACTIVATE: 830 return (EOPNOTSUPP); 831 832 case DVACT_DEACTIVATE: 833 sc->sc_dying = 1; 834 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 835 for (i = 0; dev->subdevs[i]; i++) 836 rv |= config_deactivate(dev->subdevs[i]); 837 } 838 break; 839 } 840 return (rv); 841 } 842 843 int 844 usb_detach(device_ptr_t self, int flags) 845 { 846 struct usb_softc *sc = (struct usb_softc *)self; 847 struct usb_event *ue; 848 849 DPRINTF(("usb_detach: start\n")); 850 851 sc->sc_dying = 1; 852 853 /* Make all devices disconnect. */ 854 if (sc->sc_port.device != NULL) 855 usb_disconnect_port(&sc->sc_port, self); 856 857 /* Kill off event thread. */ 858 if (sc->sc_event_thread != NULL) { 859 wakeup(&sc->sc_bus->needs_explore); 860 if (tsleep(sc, PWAIT, "usbdet", hz * 60)) 861 printf("%s: event thread didn't die\n", 862 USBDEVNAME(sc->sc_dev)); 863 DPRINTF(("usb_detach: event thread dead\n")); 864 } 865 866 usbd_finish(); 867 868 #ifdef USB_USE_SOFTINTR 869 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 870 if (sc->sc_bus->soft != NULL) { 871 softintr_disestablish(sc->sc_bus->soft); 872 sc->sc_bus->soft = NULL; 873 } 874 #else 875 callout_stop(&sc->sc_bus->softi); 876 #endif 877 #endif 878 879 ue = usb_alloc_event(); 880 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 881 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 882 883 return (0); 884 } 885