usb.c revision 1.96
1 /* $NetBSD: usb.c,v 1.96 2007/03/04 06:02:50 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 (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 1.96 2007/03/04 06:02:50 christos 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 68 #include <dev/usb/usb.h> 69 #include <dev/usb/usbdi.h> 70 #include <dev/usb/usbdi_util.h> 71 72 #define USB_DEV_MINOR 255 73 74 #include <machine/bus.h> 75 76 #include <dev/usb/usbdivar.h> 77 #include <dev/usb/usb_quirks.h> 78 79 #ifdef USB_DEBUG 80 #define DPRINTF(x) if (usbdebug) logprintf x 81 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 82 int usbdebug = 0; 83 #if defined(UHCI_DEBUG) && NUHCI > 0 84 extern int uhcidebug; 85 #endif 86 #if defined(OHCI_DEBUG) && NOHCI > 0 87 extern int ohcidebug; 88 #endif 89 /* 90 * 0 - do usual exploration 91 * 1 - do not use timeout exploration 92 * >1 - do no exploration 93 */ 94 int usb_noexplore = 0; 95 #else 96 #define DPRINTF(x) 97 #define DPRINTFN(n,x) 98 #endif 99 100 struct usb_softc { 101 USBBASEDEVICE sc_dev; /* base device */ 102 usbd_bus_handle sc_bus; /* USB controller */ 103 struct usbd_port sc_port; /* dummy port for root hub */ 104 105 struct proc *sc_event_thread; 106 107 char sc_dying; 108 }; 109 110 struct usb_taskq { 111 TAILQ_HEAD(, usb_task) tasks; 112 struct proc *task_thread_proc; 113 const char *name; 114 int taskcreated; /* task thread exists. */ 115 }; 116 117 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 118 119 dev_type_open(usbopen); 120 dev_type_close(usbclose); 121 dev_type_read(usbread); 122 dev_type_ioctl(usbioctl); 123 dev_type_poll(usbpoll); 124 dev_type_kqfilter(usbkqfilter); 125 126 const struct cdevsw usb_cdevsw = { 127 usbopen, usbclose, usbread, nowrite, usbioctl, 128 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 129 }; 130 131 Static void usb_discover(void *); 132 Static void usb_create_event_thread(void *); 133 Static void usb_event_thread(void *); 134 Static void usb_task_thread(void *); 135 136 #define USB_MAX_EVENTS 100 137 struct usb_event_q { 138 struct usb_event ue; 139 SIMPLEQ_ENTRY(usb_event_q) next; 140 }; 141 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 142 SIMPLEQ_HEAD_INITIALIZER(usb_events); 143 Static int usb_nevents = 0; 144 Static struct selinfo usb_selevent; 145 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 146 Static int usb_dev_open = 0; 147 Static struct usb_event *usb_alloc_event(void); 148 Static void usb_free_event(struct usb_event *); 149 Static void usb_add_event(int, struct usb_event *); 150 151 Static int usb_get_next_event(struct usb_event *); 152 153 #ifdef COMPAT_30 154 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 155 #endif 156 157 Static const char *usbrev_str[] = USBREV_STR; 158 159 USB_DECLARE_DRIVER(usb); 160 161 USB_MATCH(usb) 162 { 163 DPRINTF(("usbd_match\n")); 164 return (UMATCH_GENERIC); 165 } 166 167 USB_ATTACH(usb) 168 { 169 struct usb_softc *sc = (struct usb_softc *)self; 170 usbd_device_handle dev; 171 usbd_status err; 172 int usbrev; 173 int speed; 174 struct usb_event *ue; 175 176 DPRINTF(("usbd_attach\n")); 177 178 sc->sc_bus = aux; 179 sc->sc_bus->usbctl = sc; 180 sc->sc_port.power = USB_MAX_POWER; 181 182 usbrev = sc->sc_bus->usbrev; 183 printf(": USB revision %s", usbrev_str[usbrev]); 184 switch (usbrev) { 185 case USBREV_1_0: 186 case USBREV_1_1: 187 speed = USB_SPEED_FULL; 188 break; 189 case USBREV_2_0: 190 speed = USB_SPEED_HIGH; 191 break; 192 default: 193 printf(", not supported\n"); 194 sc->sc_dying = 1; 195 USB_ATTACH_ERROR_RETURN; 196 } 197 printf("\n"); 198 199 /* Make sure not to use tsleep() if we are cold booting. */ 200 if (cold) 201 sc->sc_bus->use_polling++; 202 203 ue = usb_alloc_event(); 204 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 205 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 206 207 #ifdef USB_USE_SOFTINTR 208 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 209 /* XXX we should have our own level */ 210 sc->sc_bus->soft = softintr_establish(IPL_SOFTNET, 211 sc->sc_bus->methods->soft_intr, sc->sc_bus); 212 if (sc->sc_bus->soft == NULL) { 213 printf("%s: can't register softintr\n", USBDEVNAME(sc->sc_dev)); 214 sc->sc_dying = 1; 215 USB_ATTACH_ERROR_RETURN; 216 } 217 #else 218 usb_callout_init(sc->sc_bus->softi); 219 #endif 220 #endif 221 222 err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, speed, 0, 223 &sc->sc_port); 224 if (!err) { 225 dev = sc->sc_port.device; 226 if (dev->hub == NULL) { 227 sc->sc_dying = 1; 228 printf("%s: root device is not a hub\n", 229 USBDEVNAME(sc->sc_dev)); 230 USB_ATTACH_ERROR_RETURN; 231 } 232 sc->sc_bus->root_hub = dev; 233 #if 1 234 /* 235 * Turning this code off will delay attachment of USB devices 236 * until the USB event thread is running, which means that 237 * the keyboard will not work until after cold boot. 238 */ 239 if (cold && (device_cfdata(&sc->sc_dev)->cf_flags & 1)) 240 dev->hub->explore(sc->sc_bus->root_hub); 241 #endif 242 } else { 243 printf("%s: root hub problem, error=%d\n", 244 USBDEVNAME(sc->sc_dev), err); 245 sc->sc_dying = 1; 246 } 247 if (cold) 248 sc->sc_bus->use_polling--; 249 250 config_pending_incr(); 251 usb_kthread_create(usb_create_event_thread, sc); 252 253 USB_ATTACH_SUCCESS_RETURN; 254 } 255 256 static const char *taskq_names[] = USB_TASKQ_NAMES; 257 258 #if defined(__NetBSD__) || defined(__OpenBSD__) 259 void 260 usb_create_event_thread(void *arg) 261 { 262 struct usb_softc *sc = arg; 263 struct usb_taskq *taskq; 264 int i; 265 266 if (usb_kthread_create1(usb_event_thread, sc, &sc->sc_event_thread, 267 "%s", sc->sc_dev.dv_xname)) { 268 printf("%s: unable to create event thread for\n", 269 sc->sc_dev.dv_xname); 270 panic("usb_create_event_thread"); 271 } 272 for (i = 0; i < USB_NUM_TASKQS; i++) { 273 taskq = &usb_taskq[i]; 274 275 if (taskq->taskcreated) 276 continue; 277 278 TAILQ_INIT(&taskq->tasks); 279 taskq->taskcreated = 1; 280 taskq->name = taskq_names[i]; 281 if (usb_kthread_create1(usb_task_thread, taskq, 282 &taskq->task_thread_proc, taskq->name)) { 283 printf("unable to create task thread: %s\n", taskq->name); 284 panic("usb_create_event_thread task"); 285 } 286 } 287 } 288 289 /* 290 * Add a task to be performed by the task thread. This function can be 291 * called from any context and the task will be executed in a process 292 * context ASAP. 293 */ 294 void 295 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 296 { 297 struct usb_taskq *taskq; 298 int s; 299 300 taskq = &usb_taskq[queue]; 301 s = splusb(); 302 if (task->queue == -1) { 303 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 304 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 305 task->queue = queue; 306 } else { 307 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 308 } 309 wakeup(&taskq->tasks); 310 splx(s); 311 } 312 313 void 314 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 315 { 316 struct usb_taskq *taskq; 317 int s; 318 319 taskq = &usb_taskq[task->queue]; 320 s = splusb(); 321 if (task->queue != -1) { 322 TAILQ_REMOVE(&taskq->tasks, task, next); 323 task->queue = -1; 324 } 325 splx(s); 326 } 327 328 void 329 usb_event_thread(void *arg) 330 { 331 struct usb_softc *sc = arg; 332 333 DPRINTF(("usb_event_thread: start\n")); 334 335 /* 336 * In case this controller is a companion controller to an 337 * EHCI controller we need to wait until the EHCI controller 338 * has grabbed the port. 339 * XXX It would be nicer to do this with a tsleep(), but I don't 340 * know how to synchronize the creation of the threads so it 341 * will work. 342 */ 343 usb_delay_ms(sc->sc_bus, 500); 344 345 /* Make sure first discover does something. */ 346 sc->sc_bus->needs_explore = 1; 347 usb_discover(sc); 348 config_pending_decr(); 349 350 while (!sc->sc_dying) { 351 #ifdef USB_DEBUG 352 if (usb_noexplore < 2) 353 #endif 354 usb_discover(sc); 355 #ifdef USB_DEBUG 356 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 357 usb_noexplore ? 0 : hz * 60); 358 #else 359 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 360 hz * 60); 361 #endif 362 DPRINTFN(2,("usb_event_thread: woke up\n")); 363 } 364 sc->sc_event_thread = NULL; 365 366 /* In case parent is waiting for us to exit. */ 367 wakeup(sc); 368 369 DPRINTF(("usb_event_thread: exit\n")); 370 kthread_exit(0); 371 } 372 373 void 374 usb_task_thread(void *arg) 375 { 376 struct usb_task *task; 377 struct usb_taskq *taskq; 378 int s; 379 380 taskq = arg; 381 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 382 383 s = splusb(); 384 for (;;) { 385 task = TAILQ_FIRST(&taskq->tasks); 386 if (task == NULL) { 387 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 388 task = TAILQ_FIRST(&taskq->tasks); 389 } 390 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 391 if (task != NULL) { 392 TAILQ_REMOVE(&taskq->tasks, task, next); 393 task->queue = -1; 394 splx(s); 395 task->fun(task->arg); 396 s = splusb(); 397 } 398 } 399 } 400 401 int 402 usbctlprint(void *aux, const char *pnp) 403 { 404 /* only "usb"es can attach to host controllers */ 405 if (pnp) 406 aprint_normal("usb at %s", pnp); 407 408 return (UNCONF); 409 } 410 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 411 412 int 413 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 414 { 415 int unit = minor(dev); 416 struct usb_softc *sc; 417 418 if (unit == USB_DEV_MINOR) { 419 if (usb_dev_open) 420 return (EBUSY); 421 usb_dev_open = 1; 422 usb_async_proc = 0; 423 return (0); 424 } 425 426 USB_GET_SC_OPEN(usb, unit, sc); 427 428 if (sc->sc_dying) 429 return (EIO); 430 431 return (0); 432 } 433 434 int 435 usbread(dev_t dev, struct uio *uio, int flag) 436 { 437 struct usb_event *ue; 438 #ifdef COMPAT_30 439 struct usb_event_old *ueo = NULL; /* XXXGCC */ 440 #endif 441 int s, error, n, useold; 442 443 if (minor(dev) != USB_DEV_MINOR) 444 return (ENXIO); 445 446 useold = 0; 447 switch (uio->uio_resid) { 448 #ifdef COMPAT_30 449 case sizeof(struct usb_event_old): 450 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 451 M_WAITOK|M_ZERO); 452 useold = 1; 453 /* FALLTHRU */ 454 #endif 455 case sizeof(struct usb_event): 456 ue = usb_alloc_event(); 457 break; 458 default: 459 return (EINVAL); 460 } 461 462 error = 0; 463 s = splusb(); 464 for (;;) { 465 n = usb_get_next_event(ue); 466 if (n != 0) 467 break; 468 if (flag & IO_NDELAY) { 469 error = EWOULDBLOCK; 470 break; 471 } 472 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 473 if (error) 474 break; 475 } 476 splx(s); 477 if (!error) { 478 #ifdef COMPAT_30 479 if (useold) { /* copy fields to old struct */ 480 ueo->ue_type = ue->ue_type; 481 memcpy(&ueo->ue_time, &ue->ue_time, 482 sizeof(struct timespec)); 483 switch (ue->ue_type) { 484 case USB_EVENT_DEVICE_ATTACH: 485 case USB_EVENT_DEVICE_DETACH: 486 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 487 break; 488 489 case USB_EVENT_CTRLR_ATTACH: 490 case USB_EVENT_CTRLR_DETACH: 491 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 492 break; 493 494 case USB_EVENT_DRIVER_ATTACH: 495 case USB_EVENT_DRIVER_DETACH: 496 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 497 memcpy(ueo->u.ue_driver.ue_devname, 498 ue->u.ue_driver.ue_devname, 499 sizeof(ue->u.ue_driver.ue_devname)); 500 break; 501 default: 502 ; 503 } 504 505 error = uiomove((void *)ueo, uio->uio_resid, uio); 506 } else 507 #endif 508 error = uiomove((void *)ue, uio->uio_resid, uio); 509 } 510 usb_free_event(ue); 511 #ifdef COMPAT_30 512 if (useold) 513 free(ueo, M_USBDEV); 514 #endif 515 516 return (error); 517 } 518 519 int 520 usbclose(dev_t dev, int flag, int mode, 521 struct lwp *l) 522 { 523 int unit = minor(dev); 524 525 if (unit == USB_DEV_MINOR) { 526 usb_async_proc = 0; 527 usb_dev_open = 0; 528 } 529 530 return (0); 531 } 532 533 int 534 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 535 { 536 struct usb_softc *sc; 537 int unit = minor(devt); 538 539 if (unit == USB_DEV_MINOR) { 540 switch (cmd) { 541 case FIONBIO: 542 /* All handled in the upper FS layer. */ 543 return (0); 544 545 case FIOASYNC: 546 if (*(int *)data) 547 usb_async_proc = l->l_proc; 548 else 549 usb_async_proc = 0; 550 return (0); 551 552 default: 553 return (EINVAL); 554 } 555 } 556 557 USB_GET_SC(usb, unit, sc); 558 559 if (sc->sc_dying) 560 return (EIO); 561 562 switch (cmd) { 563 #ifdef USB_DEBUG 564 case USB_SETDEBUG: 565 if (!(flag & FWRITE)) 566 return (EBADF); 567 usbdebug = ((*(int *)data) & 0x000000ff); 568 #if defined(UHCI_DEBUG) && NUHCI > 0 569 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 570 #endif 571 #if defined(OHCI_DEBUG) && NOHCI > 0 572 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 573 #endif 574 break; 575 #endif /* USB_DEBUG */ 576 case USB_REQUEST: 577 { 578 struct usb_ctl_request *ur = (void *)data; 579 int len = UGETW(ur->ucr_request.wLength); 580 struct iovec iov; 581 struct uio uio; 582 void *ptr = 0; 583 int addr = ur->ucr_addr; 584 usbd_status err; 585 int error = 0; 586 587 if (!(flag & FWRITE)) 588 return (EBADF); 589 590 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 591 if (len < 0 || len > 32768) 592 return (EINVAL); 593 if (addr < 0 || addr >= USB_MAX_DEVICES || 594 sc->sc_bus->devices[addr] == 0) 595 return (EINVAL); 596 if (len != 0) { 597 iov.iov_base = (void *)ur->ucr_data; 598 iov.iov_len = len; 599 uio.uio_iov = &iov; 600 uio.uio_iovcnt = 1; 601 uio.uio_resid = len; 602 uio.uio_offset = 0; 603 uio.uio_rw = 604 ur->ucr_request.bmRequestType & UT_READ ? 605 UIO_READ : UIO_WRITE; 606 uio.uio_vmspace = l->l_proc->p_vmspace; 607 ptr = malloc(len, M_TEMP, M_WAITOK); 608 if (uio.uio_rw == UIO_WRITE) { 609 error = uiomove(ptr, len, &uio); 610 if (error) 611 goto ret; 612 } 613 } 614 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 615 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 616 USBD_DEFAULT_TIMEOUT); 617 if (err) { 618 error = EIO; 619 goto ret; 620 } 621 if (len != 0) { 622 if (uio.uio_rw == UIO_READ) { 623 error = uiomove(ptr, len, &uio); 624 if (error) 625 goto ret; 626 } 627 } 628 ret: 629 if (ptr) 630 free(ptr, M_TEMP); 631 return (error); 632 } 633 634 case USB_DEVICEINFO: 635 { 636 usbd_device_handle dev; 637 struct usb_device_info *di = (void *)data; 638 int addr = di->udi_addr; 639 640 if (addr < 1 || addr >= USB_MAX_DEVICES) 641 return EINVAL; 642 if ((dev = sc->sc_bus->devices[addr]) == NULL) 643 return ENXIO; 644 usbd_fill_deviceinfo(dev, di, 1); 645 break; 646 } 647 648 #ifdef COMPAT_30 649 case USB_DEVICEINFO_OLD: 650 { 651 usbd_device_handle dev; 652 struct usb_device_info_old *di = (void *)data; 653 int addr = di->udi_addr; 654 655 if (addr < 1 || addr >= USB_MAX_DEVICES) 656 return EINVAL; 657 if ((dev = sc->sc_bus->devices[addr]) == NULL) 658 return ENXIO; 659 usbd_fill_deviceinfo_old(dev, di, 1); 660 break; 661 } 662 #endif 663 664 case USB_DEVICESTATS: 665 *(struct usb_device_stats *)data = sc->sc_bus->stats; 666 break; 667 668 default: 669 return (EINVAL); 670 } 671 return (0); 672 } 673 674 int 675 usbpoll(dev_t dev, int events, struct lwp *l) 676 { 677 int revents, mask, s; 678 679 if (minor(dev) == USB_DEV_MINOR) { 680 revents = 0; 681 mask = POLLIN | POLLRDNORM; 682 683 s = splusb(); 684 if (events & mask && usb_nevents > 0) 685 revents |= events & mask; 686 if (revents == 0 && events & mask) 687 selrecord(l, &usb_selevent); 688 splx(s); 689 690 return (revents); 691 } else { 692 return (0); 693 } 694 } 695 696 static void 697 filt_usbrdetach(struct knote *kn) 698 { 699 int s; 700 701 s = splusb(); 702 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 703 splx(s); 704 } 705 706 static int 707 filt_usbread(struct knote *kn, long hint) 708 { 709 710 if (usb_nevents == 0) 711 return (0); 712 713 kn->kn_data = sizeof(struct usb_event); 714 return (1); 715 } 716 717 static const struct filterops usbread_filtops = 718 { 1, NULL, filt_usbrdetach, filt_usbread }; 719 720 int 721 usbkqfilter(dev_t dev, struct knote *kn) 722 { 723 struct klist *klist; 724 int s; 725 726 switch (kn->kn_filter) { 727 case EVFILT_READ: 728 if (minor(dev) != USB_DEV_MINOR) 729 return (1); 730 klist = &usb_selevent.sel_klist; 731 kn->kn_fop = &usbread_filtops; 732 break; 733 734 default: 735 return (1); 736 } 737 738 kn->kn_hook = NULL; 739 740 s = splusb(); 741 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 742 splx(s); 743 744 return (0); 745 } 746 747 /* Explore device tree from the root. */ 748 Static void 749 usb_discover(void *v) 750 { 751 struct usb_softc *sc = v; 752 753 DPRINTFN(2,("usb_discover\n")); 754 #ifdef USB_DEBUG 755 if (usb_noexplore > 1) 756 return; 757 #endif 758 /* 759 * We need mutual exclusion while traversing the device tree, 760 * but this is guaranteed since this function is only called 761 * from the event thread for the controller. 762 */ 763 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 764 sc->sc_bus->needs_explore = 0; 765 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 766 } 767 } 768 769 void 770 usb_needs_explore(usbd_device_handle dev) 771 { 772 DPRINTFN(2,("usb_needs_explore\n")); 773 dev->bus->needs_explore = 1; 774 wakeup(&dev->bus->needs_explore); 775 } 776 777 void 778 usb_needs_reattach(usbd_device_handle dev) 779 { 780 DPRINTFN(2,("usb_needs_reattach\n")); 781 dev->powersrc->reattach = 1; 782 dev->bus->needs_explore = 1; 783 wakeup(&dev->bus->needs_explore); 784 } 785 786 /* Called at splusb() */ 787 int 788 usb_get_next_event(struct usb_event *ue) 789 { 790 struct usb_event_q *ueq; 791 792 if (usb_nevents <= 0) 793 return (0); 794 ueq = SIMPLEQ_FIRST(&usb_events); 795 #ifdef DIAGNOSTIC 796 if (ueq == NULL) { 797 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 798 usb_nevents = 0; 799 return (0); 800 } 801 #endif 802 if (ue) 803 *ue = ueq->ue; 804 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 805 usb_free_event((struct usb_event *)(void *)ueq); 806 usb_nevents--; 807 return (1); 808 } 809 810 void 811 usbd_add_dev_event(int type, usbd_device_handle udev) 812 { 813 struct usb_event *ue = usb_alloc_event(); 814 815 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 816 usb_add_event(type, ue); 817 } 818 819 void 820 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 821 { 822 struct usb_event *ue = usb_alloc_event(); 823 824 ue->u.ue_driver.ue_cookie = udev->cookie; 825 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 826 sizeof ue->u.ue_driver.ue_devname); 827 usb_add_event(type, ue); 828 } 829 830 Static struct usb_event * 831 usb_alloc_event(void) 832 { 833 /* Yes, this is right; we allocate enough so that we can use it later */ 834 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 835 } 836 837 Static void 838 usb_free_event(struct usb_event *uep) 839 { 840 free(uep, M_USBDEV); 841 } 842 843 Static void 844 usb_add_event(int type, struct usb_event *uep) 845 { 846 struct usb_event_q *ueq; 847 struct timeval thetime; 848 int s; 849 850 microtime(&thetime); 851 /* Don't want to wait here inside splusb() */ 852 ueq = (struct usb_event_q *)(void *)uep; 853 ueq->ue = *uep; 854 ueq->ue.ue_type = type; 855 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 856 857 s = splusb(); 858 if (++usb_nevents >= USB_MAX_EVENTS) { 859 /* Too many queued events, drop an old one. */ 860 DPRINTFN(-1,("usb: event dropped\n")); 861 (void)usb_get_next_event(0); 862 } 863 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 864 wakeup(&usb_events); 865 selnotify(&usb_selevent, 0); 866 if (usb_async_proc != NULL) { 867 mutex_enter(&proclist_mutex); 868 psignal(usb_async_proc, SIGIO); 869 mutex_exit(&proclist_mutex); 870 } 871 splx(s); 872 } 873 874 void 875 usb_schedsoftintr(usbd_bus_handle bus) 876 { 877 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 878 #ifdef USB_USE_SOFTINTR 879 if (bus->use_polling) { 880 bus->methods->soft_intr(bus); 881 } else { 882 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 883 softintr_schedule(bus->soft); 884 #else 885 if (!callout_pending(&bus->softi)) 886 callout_reset(&bus->softi, 0, bus->methods->soft_intr, 887 bus); 888 #endif /* __HAVE_GENERIC_SOFT_INTERRUPTS */ 889 } 890 #else 891 bus->methods->soft_intr(bus); 892 #endif /* USB_USE_SOFTINTR */ 893 } 894 895 int 896 usb_activate(device_ptr_t self, enum devact act) 897 { 898 struct usb_softc *sc = (struct usb_softc *)self; 899 usbd_device_handle dev = sc->sc_port.device; 900 int i, rv = 0; 901 902 switch (act) { 903 case DVACT_ACTIVATE: 904 return (EOPNOTSUPP); 905 906 case DVACT_DEACTIVATE: 907 sc->sc_dying = 1; 908 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 909 for (i = 0; dev->subdevs[i]; i++) 910 rv |= config_deactivate(dev->subdevs[i]); 911 } 912 break; 913 } 914 return (rv); 915 } 916 917 int 918 usb_detach(device_ptr_t self, int flags) 919 { 920 struct usb_softc *sc = (struct usb_softc *)self; 921 struct usb_event *ue; 922 923 DPRINTF(("usb_detach: start\n")); 924 925 sc->sc_dying = 1; 926 927 /* Make all devices disconnect. */ 928 if (sc->sc_port.device != NULL) 929 usb_disconnect_port(&sc->sc_port, self); 930 931 /* Kill off event thread. */ 932 if (sc->sc_event_thread != NULL) { 933 wakeup(&sc->sc_bus->needs_explore); 934 if (tsleep(sc, PWAIT, "usbdet", hz * 60)) 935 printf("%s: event thread didn't die\n", 936 USBDEVNAME(sc->sc_dev)); 937 DPRINTF(("usb_detach: event thread dead\n")); 938 } 939 940 #ifdef USB_USE_SOFTINTR 941 #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS 942 if (sc->sc_bus->soft != NULL) { 943 softintr_disestablish(sc->sc_bus->soft); 944 sc->sc_bus->soft = NULL; 945 } 946 #else 947 callout_stop(&sc->sc_bus->softi); 948 #endif 949 #endif 950 951 ue = usb_alloc_event(); 952 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 953 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 954 955 return (0); 956 } 957 958 #ifdef COMPAT_30 959 Static void 960 usb_copy_old_devinfo(struct usb_device_info_old *uo, 961 const struct usb_device_info *ue) 962 { 963 const unsigned char *p; 964 unsigned char *q; 965 int i, n; 966 967 uo->udi_bus = ue->udi_bus; 968 uo->udi_addr = ue->udi_addr; 969 uo->udi_cookie = ue->udi_cookie; 970 for (i = 0, p = (const unsigned char *)ue->udi_product, 971 q = (unsigned char *)uo->udi_product; 972 *p && i < USB_MAX_STRING_LEN - 1; p++) { 973 if (*p < 0x80) 974 q[i++] = *p; 975 else { 976 q[i++] = '?'; 977 if ((*p & 0xe0) == 0xe0) 978 p++; 979 p++; 980 } 981 } 982 q[i] = 0; 983 984 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 985 *p && i < USB_MAX_STRING_LEN - 1; p++) { 986 if (* p < 0x80) 987 q[i++] = *p; 988 else { 989 q[i++] = '?'; 990 p++; 991 if ((*p & 0xe0) == 0xe0) 992 p++; 993 } 994 } 995 q[i] = 0; 996 997 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 998 999 uo->udi_productNo = ue->udi_productNo; 1000 uo->udi_vendorNo = ue->udi_vendorNo; 1001 uo->udi_releaseNo = ue->udi_releaseNo; 1002 uo->udi_class = ue->udi_class; 1003 uo->udi_subclass = ue->udi_subclass; 1004 uo->udi_protocol = ue->udi_protocol; 1005 uo->udi_config = ue->udi_config; 1006 uo->udi_speed = ue->udi_speed; 1007 uo->udi_power = ue->udi_power; 1008 uo->udi_nports = ue->udi_nports; 1009 1010 for (n=0; n<USB_MAX_DEVNAMES; n++) 1011 memcpy(uo->udi_devnames[n], 1012 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1013 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1014 } 1015 #endif 1016
Indexes created Tue Sep 23 14:10:03 GMT 2025