usb.c revision 1.124
1 /* $NetBSD: usb.c,v 1.124 2011/05/23 21:50:44 joerg Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002, 2008 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 * 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 /* 34 * USB specifications and other documentation can be found at 35 * http://www.usb.org/developers/docs/ and 36 * http://www.usb.org/developers/devclass_docs/ 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.124 2011/05/23 21:50:44 joerg Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <sys/device.h> 49 #include <sys/kthread.h> 50 #include <sys/proc.h> 51 #include <sys/conf.h> 52 #include <sys/fcntl.h> 53 #include <sys/poll.h> 54 #include <sys/select.h> 55 #include <sys/vnode.h> 56 #include <sys/signalvar.h> 57 #include <sys/intr.h> 58 #include <sys/module.h> 59 60 #include <dev/usb/usb.h> 61 #include <dev/usb/usbdi.h> 62 #include <dev/usb/usbdi_util.h> 63 #include <dev/usb/usb_verbose.h> 64 65 #define USB_DEV_MINOR 255 66 67 #include <sys/bus.h> 68 69 #include <dev/usb/usbdivar.h> 70 #include <dev/usb/usb_quirks.h> 71 72 #ifdef USB_DEBUG 73 #define DPRINTF(x) if (usbdebug) printf x 74 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 75 int usbdebug = 0; 76 /* 77 * 0 - do usual exploration 78 * 1 - do not use timeout exploration 79 * >1 - do no exploration 80 */ 81 int usb_noexplore = 0; 82 #else 83 #define DPRINTF(x) 84 #define DPRINTFN(n,x) 85 #endif 86 87 struct usb_softc { 88 #if 0 89 device_t sc_dev; /* base device */ 90 #endif 91 usbd_bus_handle sc_bus; /* USB controller */ 92 struct usbd_port sc_port; /* dummy port for root hub */ 93 94 struct lwp *sc_event_thread; 95 96 char sc_dying; 97 }; 98 99 struct usb_taskq { 100 TAILQ_HEAD(, usb_task) tasks; 101 struct lwp *task_thread_lwp; 102 const char *name; 103 int taskcreated; /* task thread exists. */ 104 }; 105 106 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 107 108 dev_type_open(usbopen); 109 dev_type_close(usbclose); 110 dev_type_read(usbread); 111 dev_type_ioctl(usbioctl); 112 dev_type_poll(usbpoll); 113 dev_type_kqfilter(usbkqfilter); 114 115 const struct cdevsw usb_cdevsw = { 116 usbopen, usbclose, usbread, nowrite, usbioctl, 117 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 118 }; 119 120 Static void usb_discover(struct usb_softc *); 121 Static void usb_create_event_thread(device_t); 122 Static void usb_event_thread(void *); 123 Static void usb_task_thread(void *); 124 125 #define USB_MAX_EVENTS 100 126 struct usb_event_q { 127 struct usb_event ue; 128 SIMPLEQ_ENTRY(usb_event_q) next; 129 }; 130 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 131 SIMPLEQ_HEAD_INITIALIZER(usb_events); 132 Static int usb_nevents = 0; 133 Static struct selinfo usb_selevent; 134 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 135 Static void *usb_async_sih; 136 Static int usb_dev_open = 0; 137 Static struct usb_event *usb_alloc_event(void); 138 Static void usb_free_event(struct usb_event *); 139 Static void usb_add_event(int, struct usb_event *); 140 Static int usb_get_next_event(struct usb_event *); 141 Static void usb_async_intr(void *); 142 143 #ifdef COMPAT_30 144 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 145 #endif 146 147 Static const char *usbrev_str[] = USBREV_STR; 148 149 static int usb_match(device_t, cfdata_t, void *); 150 static void usb_attach(device_t, device_t, void *); 151 static int usb_detach(device_t, int); 152 static int usb_activate(device_t, enum devact); 153 static void usb_childdet(device_t, device_t); 154 static void usb_doattach(device_t); 155 156 extern struct cfdriver usb_cd; 157 158 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 159 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 160 DVF_DETACH_SHUTDOWN); 161 162 int 163 usb_match(device_t parent, cfdata_t match, void *aux) 164 { 165 DPRINTF(("usbd_match\n")); 166 return (UMATCH_GENERIC); 167 } 168 169 void 170 usb_attach(device_t parent, device_t self, void *aux) 171 { 172 struct usb_softc *sc = device_private(self); 173 int usbrev; 174 175 sc->sc_bus = aux; 176 usbrev = sc->sc_bus->usbrev; 177 178 aprint_naive("\n"); 179 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 180 switch (usbrev) { 181 case USBREV_1_0: 182 case USBREV_1_1: 183 case USBREV_2_0: 184 break; 185 default: 186 aprint_error(", not supported\n"); 187 sc->sc_dying = 1; 188 return; 189 } 190 aprint_normal("\n"); 191 192 config_interrupts(self, usb_doattach); 193 } 194 195 static void 196 usb_doattach(device_t self) 197 { 198 static bool usb_selevent_init; /* XXX */ 199 struct usb_softc *sc = device_private(self); 200 usbd_device_handle dev; 201 usbd_status err; 202 int speed; 203 struct usb_event *ue; 204 205 if (!usb_selevent_init) { 206 selinit(&usb_selevent); 207 usb_selevent_init = true; 208 } 209 DPRINTF(("usbd_doattach\n")); 210 211 sc->sc_bus->usbctl = self; 212 sc->sc_port.power = USB_MAX_POWER; 213 214 switch (sc->sc_bus->usbrev) { 215 case USBREV_1_0: 216 case USBREV_1_1: 217 speed = USB_SPEED_FULL; 218 break; 219 case USBREV_2_0: 220 speed = USB_SPEED_HIGH; 221 break; 222 default: 223 panic("usb_doattach"); 224 } 225 226 ue = usb_alloc_event(); 227 ue->u.ue_ctrlr.ue_bus = device_unit(self); 228 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 229 230 #ifdef USB_USE_SOFTINTR 231 /* XXX we should have our own level */ 232 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 233 sc->sc_bus->methods->soft_intr, sc->sc_bus); 234 if (sc->sc_bus->soft == NULL) { 235 aprint_error("%s: can't register softintr\n", 236 device_xname(self)); 237 sc->sc_dying = 1; 238 return; 239 } 240 #endif 241 242 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 243 &sc->sc_port); 244 if (!err) { 245 dev = sc->sc_port.device; 246 if (dev->hub == NULL) { 247 sc->sc_dying = 1; 248 aprint_error("%s: root device is not a hub\n", 249 device_xname(self)); 250 return; 251 } 252 sc->sc_bus->root_hub = dev; 253 #if 1 254 /* 255 * Turning this code off will delay attachment of USB devices 256 * until the USB event thread is running, which means that 257 * the keyboard will not work until after cold boot. 258 */ 259 if (cold && (device_cfdata(self)->cf_flags & 1)) 260 dev->hub->explore(sc->sc_bus->root_hub); 261 #endif 262 } else { 263 aprint_error("%s: root hub problem, error=%d\n", 264 device_xname(self), err); 265 sc->sc_dying = 1; 266 } 267 268 config_pending_incr(); 269 usb_create_event_thread(self); 270 271 if (!pmf_device_register(self, NULL, NULL)) 272 aprint_error_dev(self, "couldn't establish power handler\n"); 273 274 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 275 usb_async_intr, NULL); 276 277 return; 278 } 279 280 static const char *taskq_names[] = USB_TASKQ_NAMES; 281 282 void 283 usb_create_event_thread(device_t self) 284 { 285 struct usb_softc *sc = device_private(self); 286 struct usb_taskq *taskq; 287 int i; 288 289 if (kthread_create(PRI_NONE, 0, NULL, usb_event_thread, sc, 290 &sc->sc_event_thread, "%s", device_xname(self))) { 291 printf("%s: unable to create event thread for\n", 292 device_xname(self)); 293 panic("usb_create_event_thread"); 294 } 295 for (i = 0; i < USB_NUM_TASKQS; i++) { 296 taskq = &usb_taskq[i]; 297 298 if (taskq->taskcreated) 299 continue; 300 301 TAILQ_INIT(&taskq->tasks); 302 taskq->taskcreated = 1; 303 taskq->name = taskq_names[i]; 304 if (kthread_create(PRI_NONE, 0, NULL, usb_task_thread, 305 taskq, &taskq->task_thread_lwp, "%s", taskq->name)) { 306 printf("unable to create task thread: %s\n", taskq->name); 307 panic("usb_create_event_thread task"); 308 } 309 } 310 } 311 312 /* 313 * Add a task to be performed by the task thread. This function can be 314 * called from any context and the task will be executed in a process 315 * context ASAP. 316 */ 317 void 318 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 319 { 320 struct usb_taskq *taskq; 321 int s; 322 323 taskq = &usb_taskq[queue]; 324 s = splusb(); 325 if (task->queue == -1) { 326 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 327 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 328 task->queue = queue; 329 } else { 330 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 331 } 332 wakeup(&taskq->tasks); 333 splx(s); 334 } 335 336 void 337 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 338 { 339 struct usb_taskq *taskq; 340 int s; 341 342 taskq = &usb_taskq[task->queue]; 343 s = splusb(); 344 if (task->queue != -1) { 345 TAILQ_REMOVE(&taskq->tasks, task, next); 346 task->queue = -1; 347 } 348 splx(s); 349 } 350 351 void 352 usb_event_thread(void *arg) 353 { 354 struct usb_softc *sc = arg; 355 356 DPRINTF(("usb_event_thread: start\n")); 357 358 /* 359 * In case this controller is a companion controller to an 360 * EHCI controller we need to wait until the EHCI controller 361 * has grabbed the port. 362 * XXX It would be nicer to do this with a tsleep(), but I don't 363 * know how to synchronize the creation of the threads so it 364 * will work. 365 */ 366 usb_delay_ms(sc->sc_bus, 500); 367 368 /* Make sure first discover does something. */ 369 sc->sc_bus->needs_explore = 1; 370 usb_discover(sc); 371 config_pending_decr(); 372 373 while (!sc->sc_dying) { 374 #ifdef USB_DEBUG 375 if (usb_noexplore < 2) 376 #endif 377 usb_discover(sc); 378 #ifdef USB_DEBUG 379 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 380 usb_noexplore ? 0 : hz * 60); 381 #else 382 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 383 hz * 60); 384 #endif 385 DPRINTFN(2,("usb_event_thread: woke up\n")); 386 } 387 sc->sc_event_thread = NULL; 388 389 /* In case parent is waiting for us to exit. */ 390 wakeup(sc); 391 392 DPRINTF(("usb_event_thread: exit\n")); 393 kthread_exit(0); 394 } 395 396 void 397 usb_task_thread(void *arg) 398 { 399 struct usb_task *task; 400 struct usb_taskq *taskq; 401 int s; 402 403 taskq = arg; 404 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 405 406 s = splusb(); 407 for (;;) { 408 task = TAILQ_FIRST(&taskq->tasks); 409 if (task == NULL) { 410 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 411 task = TAILQ_FIRST(&taskq->tasks); 412 } 413 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 414 if (task != NULL) { 415 TAILQ_REMOVE(&taskq->tasks, task, next); 416 task->queue = -1; 417 splx(s); 418 task->fun(task->arg); 419 s = splusb(); 420 } 421 } 422 } 423 424 int 425 usbctlprint(void *aux, const char *pnp) 426 { 427 /* only "usb"es can attach to host controllers */ 428 if (pnp) 429 aprint_normal("usb at %s", pnp); 430 431 return (UNCONF); 432 } 433 434 int 435 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 436 { 437 int unit = minor(dev); 438 struct usb_softc *sc; 439 440 if (unit == USB_DEV_MINOR) { 441 if (usb_dev_open) 442 return (EBUSY); 443 usb_dev_open = 1; 444 mutex_enter(proc_lock); 445 usb_async_proc = 0; 446 mutex_exit(proc_lock); 447 return (0); 448 } 449 450 sc = device_lookup_private(&usb_cd, unit); 451 if (!sc) 452 return (ENXIO); 453 454 if (sc->sc_dying) 455 return (EIO); 456 457 return (0); 458 } 459 460 int 461 usbread(dev_t dev, struct uio *uio, int flag) 462 { 463 struct usb_event *ue; 464 #ifdef COMPAT_30 465 struct usb_event_old *ueo = NULL; /* XXXGCC */ 466 #endif 467 int s, error, n, useold; 468 469 if (minor(dev) != USB_DEV_MINOR) 470 return (ENXIO); 471 472 useold = 0; 473 switch (uio->uio_resid) { 474 #ifdef COMPAT_30 475 case sizeof(struct usb_event_old): 476 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 477 M_WAITOK|M_ZERO); 478 useold = 1; 479 /* FALLTHRU */ 480 #endif 481 case sizeof(struct usb_event): 482 ue = usb_alloc_event(); 483 break; 484 default: 485 return (EINVAL); 486 } 487 488 error = 0; 489 s = splusb(); 490 for (;;) { 491 n = usb_get_next_event(ue); 492 if (n != 0) 493 break; 494 if (flag & IO_NDELAY) { 495 error = EWOULDBLOCK; 496 break; 497 } 498 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 499 if (error) 500 break; 501 } 502 splx(s); 503 if (!error) { 504 #ifdef COMPAT_30 505 if (useold) { /* copy fields to old struct */ 506 ueo->ue_type = ue->ue_type; 507 memcpy(&ueo->ue_time, &ue->ue_time, 508 sizeof(struct timespec)); 509 switch (ue->ue_type) { 510 case USB_EVENT_DEVICE_ATTACH: 511 case USB_EVENT_DEVICE_DETACH: 512 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 513 break; 514 515 case USB_EVENT_CTRLR_ATTACH: 516 case USB_EVENT_CTRLR_DETACH: 517 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 518 break; 519 520 case USB_EVENT_DRIVER_ATTACH: 521 case USB_EVENT_DRIVER_DETACH: 522 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 523 memcpy(ueo->u.ue_driver.ue_devname, 524 ue->u.ue_driver.ue_devname, 525 sizeof(ue->u.ue_driver.ue_devname)); 526 break; 527 default: 528 ; 529 } 530 531 error = uiomove((void *)ueo, sizeof *ueo, uio); 532 } else 533 #endif 534 error = uiomove((void *)ue, sizeof *ue, uio); 535 } 536 usb_free_event(ue); 537 #ifdef COMPAT_30 538 if (useold) 539 free(ueo, M_USBDEV); 540 #endif 541 542 return (error); 543 } 544 545 int 546 usbclose(dev_t dev, int flag, int mode, 547 struct lwp *l) 548 { 549 int unit = minor(dev); 550 551 if (unit == USB_DEV_MINOR) { 552 mutex_enter(proc_lock); 553 usb_async_proc = 0; 554 mutex_exit(proc_lock); 555 usb_dev_open = 0; 556 } 557 558 return (0); 559 } 560 561 int 562 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 563 { 564 struct usb_softc *sc; 565 int unit = minor(devt); 566 567 if (unit == USB_DEV_MINOR) { 568 switch (cmd) { 569 case FIONBIO: 570 /* All handled in the upper FS layer. */ 571 return (0); 572 573 case FIOASYNC: 574 mutex_enter(proc_lock); 575 if (*(int *)data) 576 usb_async_proc = l->l_proc; 577 else 578 usb_async_proc = 0; 579 mutex_exit(proc_lock); 580 return (0); 581 582 default: 583 return (EINVAL); 584 } 585 } 586 587 sc = device_lookup_private(&usb_cd, unit); 588 589 if (sc->sc_dying) 590 return (EIO); 591 592 switch (cmd) { 593 #ifdef USB_DEBUG 594 case USB_SETDEBUG: 595 if (!(flag & FWRITE)) 596 return (EBADF); 597 usbdebug = ((*(int *)data) & 0x000000ff); 598 break; 599 #endif /* USB_DEBUG */ 600 case USB_REQUEST: 601 { 602 struct usb_ctl_request *ur = (void *)data; 603 int len = UGETW(ur->ucr_request.wLength); 604 struct iovec iov; 605 struct uio uio; 606 void *ptr = 0; 607 int addr = ur->ucr_addr; 608 usbd_status err; 609 int error = 0; 610 611 if (!(flag & FWRITE)) 612 return (EBADF); 613 614 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 615 if (len < 0 || len > 32768) 616 return (EINVAL); 617 if (addr < 0 || addr >= USB_MAX_DEVICES || 618 sc->sc_bus->devices[addr] == 0) 619 return (EINVAL); 620 if (len != 0) { 621 iov.iov_base = (void *)ur->ucr_data; 622 iov.iov_len = len; 623 uio.uio_iov = &iov; 624 uio.uio_iovcnt = 1; 625 uio.uio_resid = len; 626 uio.uio_offset = 0; 627 uio.uio_rw = 628 ur->ucr_request.bmRequestType & UT_READ ? 629 UIO_READ : UIO_WRITE; 630 uio.uio_vmspace = l->l_proc->p_vmspace; 631 ptr = malloc(len, M_TEMP, M_WAITOK); 632 if (uio.uio_rw == UIO_WRITE) { 633 error = uiomove(ptr, len, &uio); 634 if (error) 635 goto ret; 636 } 637 } 638 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 639 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 640 USBD_DEFAULT_TIMEOUT); 641 if (err) { 642 error = EIO; 643 goto ret; 644 } 645 if (len > ur->ucr_actlen) 646 len = ur->ucr_actlen; 647 if (len != 0) { 648 if (uio.uio_rw == UIO_READ) { 649 error = uiomove(ptr, len, &uio); 650 if (error) 651 goto ret; 652 } 653 } 654 ret: 655 if (ptr) 656 free(ptr, M_TEMP); 657 return (error); 658 } 659 660 case USB_DEVICEINFO: 661 { 662 usbd_device_handle dev; 663 struct usb_device_info *di = (void *)data; 664 int addr = di->udi_addr; 665 666 if (addr < 1 || addr >= USB_MAX_DEVICES) 667 return EINVAL; 668 if ((dev = sc->sc_bus->devices[addr]) == NULL) 669 return ENXIO; 670 usbd_fill_deviceinfo(dev, di, 1); 671 break; 672 } 673 674 #ifdef COMPAT_30 675 case USB_DEVICEINFO_OLD: 676 { 677 usbd_device_handle dev; 678 struct usb_device_info_old *di = (void *)data; 679 int addr = di->udi_addr; 680 681 if (addr < 1 || addr >= USB_MAX_DEVICES) 682 return EINVAL; 683 if ((dev = sc->sc_bus->devices[addr]) == NULL) 684 return ENXIO; 685 usbd_fill_deviceinfo_old(dev, di, 1); 686 break; 687 } 688 #endif 689 690 case USB_DEVICESTATS: 691 *(struct usb_device_stats *)data = sc->sc_bus->stats; 692 break; 693 694 default: 695 return (EINVAL); 696 } 697 return (0); 698 } 699 700 int 701 usbpoll(dev_t dev, int events, struct lwp *l) 702 { 703 int revents, mask, s; 704 705 if (minor(dev) == USB_DEV_MINOR) { 706 revents = 0; 707 mask = POLLIN | POLLRDNORM; 708 709 s = splusb(); 710 if (events & mask && usb_nevents > 0) 711 revents |= events & mask; 712 if (revents == 0 && events & mask) 713 selrecord(l, &usb_selevent); 714 splx(s); 715 716 return (revents); 717 } else { 718 return (0); 719 } 720 } 721 722 static void 723 filt_usbrdetach(struct knote *kn) 724 { 725 int s; 726 727 s = splusb(); 728 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 729 splx(s); 730 } 731 732 static int 733 filt_usbread(struct knote *kn, long hint) 734 { 735 736 if (usb_nevents == 0) 737 return (0); 738 739 kn->kn_data = sizeof(struct usb_event); 740 return (1); 741 } 742 743 static const struct filterops usbread_filtops = 744 { 1, NULL, filt_usbrdetach, filt_usbread }; 745 746 int 747 usbkqfilter(dev_t dev, struct knote *kn) 748 { 749 struct klist *klist; 750 int s; 751 752 switch (kn->kn_filter) { 753 case EVFILT_READ: 754 if (minor(dev) != USB_DEV_MINOR) 755 return (1); 756 klist = &usb_selevent.sel_klist; 757 kn->kn_fop = &usbread_filtops; 758 break; 759 760 default: 761 return (EINVAL); 762 } 763 764 kn->kn_hook = NULL; 765 766 s = splusb(); 767 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 768 splx(s); 769 770 return (0); 771 } 772 773 /* Explore device tree from the root. */ 774 Static void 775 usb_discover(struct usb_softc *sc) 776 { 777 778 DPRINTFN(2,("usb_discover\n")); 779 #ifdef USB_DEBUG 780 if (usb_noexplore > 1) 781 return; 782 #endif 783 /* 784 * We need mutual exclusion while traversing the device tree, 785 * but this is guaranteed since this function is only called 786 * from the event thread for the controller. 787 */ 788 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 789 sc->sc_bus->needs_explore = 0; 790 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 791 } 792 } 793 794 void 795 usb_needs_explore(usbd_device_handle dev) 796 { 797 DPRINTFN(2,("usb_needs_explore\n")); 798 dev->bus->needs_explore = 1; 799 wakeup(&dev->bus->needs_explore); 800 } 801 802 void 803 usb_needs_reattach(usbd_device_handle dev) 804 { 805 DPRINTFN(2,("usb_needs_reattach\n")); 806 dev->powersrc->reattach = 1; 807 dev->bus->needs_explore = 1; 808 wakeup(&dev->bus->needs_explore); 809 } 810 811 /* Called at splusb() */ 812 int 813 usb_get_next_event(struct usb_event *ue) 814 { 815 struct usb_event_q *ueq; 816 817 if (usb_nevents <= 0) 818 return (0); 819 ueq = SIMPLEQ_FIRST(&usb_events); 820 #ifdef DIAGNOSTIC 821 if (ueq == NULL) { 822 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 823 usb_nevents = 0; 824 return (0); 825 } 826 #endif 827 if (ue) 828 *ue = ueq->ue; 829 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 830 usb_free_event((struct usb_event *)(void *)ueq); 831 usb_nevents--; 832 return (1); 833 } 834 835 void 836 usbd_add_dev_event(int type, usbd_device_handle udev) 837 { 838 struct usb_event *ue = usb_alloc_event(); 839 840 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 841 usb_add_event(type, ue); 842 } 843 844 void 845 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 846 { 847 struct usb_event *ue = usb_alloc_event(); 848 849 ue->u.ue_driver.ue_cookie = udev->cookie; 850 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 851 sizeof ue->u.ue_driver.ue_devname); 852 usb_add_event(type, ue); 853 } 854 855 Static struct usb_event * 856 usb_alloc_event(void) 857 { 858 /* Yes, this is right; we allocate enough so that we can use it later */ 859 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 860 } 861 862 Static void 863 usb_free_event(struct usb_event *uep) 864 { 865 free(uep, M_USBDEV); 866 } 867 868 Static void 869 usb_add_event(int type, struct usb_event *uep) 870 { 871 struct usb_event_q *ueq; 872 struct timeval thetime; 873 int s; 874 875 microtime(&thetime); 876 /* Don't want to wait here inside splusb() */ 877 ueq = (struct usb_event_q *)(void *)uep; 878 ueq->ue = *uep; 879 ueq->ue.ue_type = type; 880 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 881 882 s = splusb(); 883 if (++usb_nevents >= USB_MAX_EVENTS) { 884 /* Too many queued events, drop an old one. */ 885 DPRINTFN(-1,("usb: event dropped\n")); 886 (void)usb_get_next_event(0); 887 } 888 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 889 wakeup(&usb_events); 890 selnotify(&usb_selevent, 0, 0); 891 if (usb_async_proc != NULL) { 892 softint_schedule(usb_async_sih); 893 } 894 splx(s); 895 } 896 897 Static void 898 usb_async_intr(void *cookie) 899 { 900 proc_t *proc; 901 902 mutex_enter(proc_lock); 903 if ((proc = usb_async_proc) != NULL) 904 psignal(proc, SIGIO); 905 mutex_exit(proc_lock); 906 } 907 908 void 909 usb_schedsoftintr(usbd_bus_handle bus) 910 { 911 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 912 #ifdef USB_USE_SOFTINTR 913 if (bus->use_polling) { 914 bus->methods->soft_intr(bus); 915 } else { 916 softint_schedule(bus->soft); 917 } 918 #else 919 bus->methods->soft_intr(bus); 920 #endif /* USB_USE_SOFTINTR */ 921 } 922 923 int 924 usb_activate(device_t self, enum devact act) 925 { 926 struct usb_softc *sc = device_private(self); 927 928 switch (act) { 929 case DVACT_DEACTIVATE: 930 sc->sc_dying = 1; 931 return 0; 932 default: 933 return EOPNOTSUPP; 934 } 935 } 936 937 void 938 usb_childdet(device_t self, device_t child) 939 { 940 int i; 941 struct usb_softc *sc = device_private(self); 942 struct usbd_device *dev; 943 944 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 945 return; 946 947 for (i = 0; i < dev->subdevlen; i++) 948 if (dev->subdevs[i] == child) 949 dev->subdevs[i] = NULL; 950 } 951 952 int 953 usb_detach(device_t self, int flags) 954 { 955 struct usb_softc *sc = device_private(self); 956 struct usb_event *ue; 957 int rc; 958 959 DPRINTF(("usb_detach: start\n")); 960 961 /* Make all devices disconnect. */ 962 if (sc->sc_port.device != NULL && 963 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 964 return rc; 965 966 pmf_device_deregister(self); 967 /* Kill off event thread. */ 968 sc->sc_dying = 1; 969 while (sc->sc_event_thread != NULL) { 970 wakeup(&sc->sc_bus->needs_explore); 971 tsleep(sc, PWAIT, "usbdet", hz * 60); 972 } 973 DPRINTF(("usb_detach: event thread dead\n")); 974 975 #ifdef USB_USE_SOFTINTR 976 if (sc->sc_bus->soft != NULL) { 977 softint_disestablish(sc->sc_bus->soft); 978 sc->sc_bus->soft = NULL; 979 } 980 #endif 981 982 ue = usb_alloc_event(); 983 ue->u.ue_ctrlr.ue_bus = device_unit(self); 984 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 985 986 return (0); 987 } 988 989 #ifdef COMPAT_30 990 Static void 991 usb_copy_old_devinfo(struct usb_device_info_old *uo, 992 const struct usb_device_info *ue) 993 { 994 const unsigned char *p; 995 unsigned char *q; 996 int i, n; 997 998 uo->udi_bus = ue->udi_bus; 999 uo->udi_addr = ue->udi_addr; 1000 uo->udi_cookie = ue->udi_cookie; 1001 for (i = 0, p = (const unsigned char *)ue->udi_product, 1002 q = (unsigned char *)uo->udi_product; 1003 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1004 if (*p < 0x80) 1005 q[i++] = *p; 1006 else { 1007 q[i++] = '?'; 1008 if ((*p & 0xe0) == 0xe0) 1009 p++; 1010 p++; 1011 } 1012 } 1013 q[i] = 0; 1014 1015 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1016 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1017 if (* p < 0x80) 1018 q[i++] = *p; 1019 else { 1020 q[i++] = '?'; 1021 p++; 1022 if ((*p & 0xe0) == 0xe0) 1023 p++; 1024 } 1025 } 1026 q[i] = 0; 1027 1028 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1029 1030 uo->udi_productNo = ue->udi_productNo; 1031 uo->udi_vendorNo = ue->udi_vendorNo; 1032 uo->udi_releaseNo = ue->udi_releaseNo; 1033 uo->udi_class = ue->udi_class; 1034 uo->udi_subclass = ue->udi_subclass; 1035 uo->udi_protocol = ue->udi_protocol; 1036 uo->udi_config = ue->udi_config; 1037 uo->udi_speed = ue->udi_speed; 1038 uo->udi_power = ue->udi_power; 1039 uo->udi_nports = ue->udi_nports; 1040 1041 for (n=0; n<USB_MAX_DEVNAMES; n++) 1042 memcpy(uo->udi_devnames[n], 1043 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1044 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1045 } 1046 #endif 1047
Indexes created Wed Sep 24 22:09:59 GMT 2025