usb.c revision 1.128
1 /* $NetBSD: usb.c,v 1.128 2012/03/06 02:49:03 mrg 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 1.128 2012/03/06 02:49:03 mrg Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_usb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/device.h> 50 #include <sys/kthread.h> 51 #include <sys/proc.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/poll.h> 55 #include <sys/select.h> 56 #include <sys/vnode.h> 57 #include <sys/signalvar.h> 58 #include <sys/intr.h> 59 #include <sys/module.h> 60 61 #include <dev/usb/usb.h> 62 #include <dev/usb/usbdi.h> 63 #include <dev/usb/usbdi_util.h> 64 #include <dev/usb/usb_verbose.h> 65 66 #define USB_DEV_MINOR 255 67 68 #include <sys/bus.h> 69 70 #include <dev/usb/usbdivar.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #ifdef USB_DEBUG 74 #define DPRINTF(x) if (usbdebug) printf x 75 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 76 int usbdebug = 0; 77 /* 78 * 0 - do usual exploration 79 * 1 - do not use timeout exploration 80 * >1 - do no exploration 81 */ 82 int usb_noexplore = 0; 83 #else 84 #define DPRINTF(x) 85 #define DPRINTFN(n,x) 86 #endif 87 88 struct usb_softc { 89 #if 0 90 device_t sc_dev; /* base device */ 91 #endif 92 usbd_bus_handle sc_bus; /* USB controller */ 93 struct usbd_port sc_port; /* dummy port for root hub */ 94 95 struct lwp *sc_event_thread; 96 97 char sc_dying; 98 }; 99 100 struct usb_taskq { 101 TAILQ_HEAD(, usb_task) tasks; 102 struct lwp *task_thread_lwp; 103 const char *name; 104 int taskcreated; /* task thread exists. */ 105 }; 106 107 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 108 109 dev_type_open(usbopen); 110 dev_type_close(usbclose); 111 dev_type_read(usbread); 112 dev_type_ioctl(usbioctl); 113 dev_type_poll(usbpoll); 114 dev_type_kqfilter(usbkqfilter); 115 116 const struct cdevsw usb_cdevsw = { 117 usbopen, usbclose, usbread, nowrite, usbioctl, 118 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 119 }; 120 121 Static void usb_discover(struct usb_softc *); 122 Static void usb_create_event_thread(device_t); 123 Static void usb_event_thread(void *); 124 Static void usb_task_thread(void *); 125 126 #define USB_MAX_EVENTS 100 127 struct usb_event_q { 128 struct usb_event ue; 129 SIMPLEQ_ENTRY(usb_event_q) next; 130 }; 131 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 132 SIMPLEQ_HEAD_INITIALIZER(usb_events); 133 Static int usb_nevents = 0; 134 Static struct selinfo usb_selevent; 135 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 136 Static void *usb_async_sih; 137 Static int usb_dev_open = 0; 138 Static struct usb_event *usb_alloc_event(void); 139 Static void usb_free_event(struct usb_event *); 140 Static void usb_add_event(int, struct usb_event *); 141 Static int usb_get_next_event(struct usb_event *); 142 Static void usb_async_intr(void *); 143 144 #ifdef COMPAT_30 145 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 146 #endif 147 148 Static const char *usbrev_str[] = USBREV_STR; 149 150 static int usb_match(device_t, cfdata_t, void *); 151 static void usb_attach(device_t, device_t, void *); 152 static int usb_detach(device_t, int); 153 static int usb_activate(device_t, enum devact); 154 static void usb_childdet(device_t, device_t); 155 static void usb_doattach(device_t); 156 157 extern struct cfdriver usb_cd; 158 159 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 160 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 161 DVF_DETACH_SHUTDOWN); 162 163 int 164 usb_match(device_t parent, cfdata_t match, void *aux) 165 { 166 DPRINTF(("usbd_match\n")); 167 return (UMATCH_GENERIC); 168 } 169 170 void 171 usb_attach(device_t parent, device_t self, void *aux) 172 { 173 struct usb_softc *sc = device_private(self); 174 int usbrev; 175 176 sc->sc_bus = aux; 177 usbrev = sc->sc_bus->usbrev; 178 179 aprint_naive("\n"); 180 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 181 switch (usbrev) { 182 case USBREV_1_0: 183 case USBREV_1_1: 184 case USBREV_2_0: 185 break; 186 default: 187 aprint_error(", not supported\n"); 188 sc->sc_dying = 1; 189 return; 190 } 191 aprint_normal("\n"); 192 193 config_interrupts(self, usb_doattach); 194 } 195 196 static void 197 usb_doattach(device_t self) 198 { 199 static bool usb_selevent_init; /* XXX */ 200 struct usb_softc *sc = device_private(self); 201 usbd_device_handle dev; 202 usbd_status err; 203 int speed; 204 struct usb_event *ue; 205 206 if (!usb_selevent_init) { 207 selinit(&usb_selevent); 208 usb_selevent_init = true; 209 } 210 DPRINTF(("usbd_doattach\n")); 211 212 sc->sc_bus->usbctl = self; 213 sc->sc_port.power = USB_MAX_POWER; 214 215 switch (sc->sc_bus->usbrev) { 216 case USBREV_1_0: 217 case USBREV_1_1: 218 speed = USB_SPEED_FULL; 219 break; 220 case USBREV_2_0: 221 speed = USB_SPEED_HIGH; 222 break; 223 default: 224 panic("usb_doattach"); 225 } 226 227 ue = usb_alloc_event(); 228 ue->u.ue_ctrlr.ue_bus = device_unit(self); 229 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 230 231 /* 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 } 240 241 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 242 &sc->sc_port); 243 if (!err) { 244 dev = sc->sc_port.device; 245 if (dev->hub == NULL) { 246 sc->sc_dying = 1; 247 aprint_error("%s: root device is not a hub\n", 248 device_xname(self)); 249 return; 250 } 251 sc->sc_bus->root_hub = dev; 252 #if 1 253 /* 254 * Turning this code off will delay attachment of USB devices 255 * until the USB event thread is running, which means that 256 * the keyboard will not work until after cold boot. 257 */ 258 if (cold && (device_cfdata(self)->cf_flags & 1)) 259 dev->hub->explore(sc->sc_bus->root_hub); 260 #endif 261 } else { 262 aprint_error("%s: root hub problem, error=%d\n", 263 device_xname(self), err); 264 sc->sc_dying = 1; 265 } 266 267 config_pending_incr(); 268 usb_create_event_thread(self); 269 270 if (!pmf_device_register(self, NULL, NULL)) 271 aprint_error_dev(self, "couldn't establish power handler\n"); 272 273 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 274 usb_async_intr, NULL); 275 276 return; 277 } 278 279 static const char *taskq_names[] = USB_TASKQ_NAMES; 280 281 void 282 usb_create_event_thread(device_t self) 283 { 284 struct usb_softc *sc = device_private(self); 285 struct usb_taskq *taskq; 286 int i; 287 288 if (kthread_create(PRI_NONE, 0, NULL, usb_event_thread, sc, 289 &sc->sc_event_thread, "%s", device_xname(self))) { 290 printf("%s: unable to create event thread for\n", 291 device_xname(self)); 292 panic("usb_create_event_thread"); 293 } 294 for (i = 0; i < USB_NUM_TASKQS; i++) { 295 taskq = &usb_taskq[i]; 296 297 if (taskq->taskcreated) 298 continue; 299 300 TAILQ_INIT(&taskq->tasks); 301 taskq->taskcreated = 1; 302 taskq->name = taskq_names[i]; 303 if (kthread_create(PRI_NONE, 0, NULL, usb_task_thread, 304 taskq, &taskq->task_thread_lwp, "%s", taskq->name)) { 305 printf("unable to create task thread: %s\n", taskq->name); 306 panic("usb_create_event_thread task"); 307 } 308 } 309 } 310 311 /* 312 * Add a task to be performed by the task thread. This function can be 313 * called from any context and the task will be executed in a process 314 * context ASAP. 315 */ 316 void 317 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 318 { 319 struct usb_taskq *taskq; 320 int s; 321 322 taskq = &usb_taskq[queue]; 323 s = splusb(); 324 if (task->queue == -1) { 325 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 326 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 327 task->queue = queue; 328 } else { 329 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 330 } 331 wakeup(&taskq->tasks); 332 splx(s); 333 } 334 335 void 336 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 337 { 338 struct usb_taskq *taskq; 339 int s; 340 341 taskq = &usb_taskq[task->queue]; 342 s = splusb(); 343 if (task->queue != -1) { 344 TAILQ_REMOVE(&taskq->tasks, task, next); 345 task->queue = -1; 346 } 347 splx(s); 348 } 349 350 void 351 usb_event_thread(void *arg) 352 { 353 struct usb_softc *sc = arg; 354 355 DPRINTF(("usb_event_thread: start\n")); 356 357 /* 358 * In case this controller is a companion controller to an 359 * EHCI controller we need to wait until the EHCI controller 360 * has grabbed the port. 361 * XXX It would be nicer to do this with a tsleep(), but I don't 362 * know how to synchronize the creation of the threads so it 363 * will work. 364 */ 365 usb_delay_ms(sc->sc_bus, 500); 366 367 /* Make sure first discover does something. */ 368 sc->sc_bus->needs_explore = 1; 369 usb_discover(sc); 370 config_pending_decr(); 371 372 while (!sc->sc_dying) { 373 #ifdef USB_DEBUG 374 if (usb_noexplore < 2) 375 #endif 376 usb_discover(sc); 377 #ifdef USB_DEBUG 378 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 379 usb_noexplore ? 0 : hz * 60); 380 #else 381 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 382 hz * 60); 383 #endif 384 DPRINTFN(2,("usb_event_thread: woke up\n")); 385 } 386 sc->sc_event_thread = NULL; 387 388 /* In case parent is waiting for us to exit. */ 389 wakeup(sc); 390 391 DPRINTF(("usb_event_thread: exit\n")); 392 kthread_exit(0); 393 } 394 395 void 396 usb_task_thread(void *arg) 397 { 398 struct usb_task *task; 399 struct usb_taskq *taskq; 400 int s; 401 402 taskq = arg; 403 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 404 405 s = splusb(); 406 for (;;) { 407 task = TAILQ_FIRST(&taskq->tasks); 408 if (task == NULL) { 409 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 410 task = TAILQ_FIRST(&taskq->tasks); 411 } 412 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 413 if (task != NULL) { 414 TAILQ_REMOVE(&taskq->tasks, task, next); 415 task->queue = -1; 416 splx(s); 417 task->fun(task->arg); 418 s = splusb(); 419 } 420 } 421 } 422 423 int 424 usbctlprint(void *aux, const char *pnp) 425 { 426 /* only "usb"es can attach to host controllers */ 427 if (pnp) 428 aprint_normal("usb at %s", pnp); 429 430 return (UNCONF); 431 } 432 433 int 434 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 435 { 436 int unit = minor(dev); 437 struct usb_softc *sc; 438 439 if (unit == USB_DEV_MINOR) { 440 if (usb_dev_open) 441 return (EBUSY); 442 usb_dev_open = 1; 443 mutex_enter(proc_lock); 444 usb_async_proc = 0; 445 mutex_exit(proc_lock); 446 return (0); 447 } 448 449 sc = device_lookup_private(&usb_cd, unit); 450 if (!sc) 451 return (ENXIO); 452 453 if (sc->sc_dying) 454 return (EIO); 455 456 return (0); 457 } 458 459 int 460 usbread(dev_t dev, struct uio *uio, int flag) 461 { 462 struct usb_event *ue; 463 #ifdef COMPAT_30 464 struct usb_event_old *ueo = NULL; /* XXXGCC */ 465 #endif 466 int s, error, n, useold; 467 468 if (minor(dev) != USB_DEV_MINOR) 469 return (ENXIO); 470 471 useold = 0; 472 switch (uio->uio_resid) { 473 #ifdef COMPAT_30 474 case sizeof(struct usb_event_old): 475 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 476 M_WAITOK|M_ZERO); 477 useold = 1; 478 /* FALLTHRU */ 479 #endif 480 case sizeof(struct usb_event): 481 ue = usb_alloc_event(); 482 break; 483 default: 484 return (EINVAL); 485 } 486 487 error = 0; 488 s = splusb(); 489 for (;;) { 490 n = usb_get_next_event(ue); 491 if (n != 0) 492 break; 493 if (flag & IO_NDELAY) { 494 error = EWOULDBLOCK; 495 break; 496 } 497 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 498 if (error) 499 break; 500 } 501 splx(s); 502 if (!error) { 503 #ifdef COMPAT_30 504 if (useold) { /* copy fields to old struct */ 505 ueo->ue_type = ue->ue_type; 506 memcpy(&ueo->ue_time, &ue->ue_time, 507 sizeof(struct timespec)); 508 switch (ue->ue_type) { 509 case USB_EVENT_DEVICE_ATTACH: 510 case USB_EVENT_DEVICE_DETACH: 511 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 512 break; 513 514 case USB_EVENT_CTRLR_ATTACH: 515 case USB_EVENT_CTRLR_DETACH: 516 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 517 break; 518 519 case USB_EVENT_DRIVER_ATTACH: 520 case USB_EVENT_DRIVER_DETACH: 521 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 522 memcpy(ueo->u.ue_driver.ue_devname, 523 ue->u.ue_driver.ue_devname, 524 sizeof(ue->u.ue_driver.ue_devname)); 525 break; 526 default: 527 ; 528 } 529 530 error = uiomove((void *)ueo, sizeof *ueo, uio); 531 } else 532 #endif 533 error = uiomove((void *)ue, sizeof *ue, uio); 534 } 535 usb_free_event(ue); 536 #ifdef COMPAT_30 537 if (useold) 538 free(ueo, M_USBDEV); 539 #endif 540 541 return (error); 542 } 543 544 int 545 usbclose(dev_t dev, int flag, int mode, 546 struct lwp *l) 547 { 548 int unit = minor(dev); 549 550 if (unit == USB_DEV_MINOR) { 551 mutex_enter(proc_lock); 552 usb_async_proc = 0; 553 mutex_exit(proc_lock); 554 usb_dev_open = 0; 555 } 556 557 return (0); 558 } 559 560 int 561 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 562 { 563 struct usb_softc *sc; 564 int unit = minor(devt); 565 566 if (unit == USB_DEV_MINOR) { 567 switch (cmd) { 568 case FIONBIO: 569 /* All handled in the upper FS layer. */ 570 return (0); 571 572 case FIOASYNC: 573 mutex_enter(proc_lock); 574 if (*(int *)data) 575 usb_async_proc = l->l_proc; 576 else 577 usb_async_proc = 0; 578 mutex_exit(proc_lock); 579 return (0); 580 581 default: 582 return (EINVAL); 583 } 584 } 585 586 sc = device_lookup_private(&usb_cd, unit); 587 588 if (sc->sc_dying) 589 return (EIO); 590 591 switch (cmd) { 592 #ifdef USB_DEBUG 593 case USB_SETDEBUG: 594 if (!(flag & FWRITE)) 595 return (EBADF); 596 usbdebug = ((*(int *)data) & 0x000000ff); 597 break; 598 #endif /* USB_DEBUG */ 599 case USB_REQUEST: 600 { 601 struct usb_ctl_request *ur = (void *)data; 602 int len = UGETW(ur->ucr_request.wLength); 603 struct iovec iov; 604 struct uio uio; 605 void *ptr = 0; 606 int addr = ur->ucr_addr; 607 usbd_status err; 608 int error = 0; 609 610 if (!(flag & FWRITE)) 611 return (EBADF); 612 613 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 614 if (len < 0 || len > 32768) 615 return (EINVAL); 616 if (addr < 0 || addr >= USB_MAX_DEVICES || 617 sc->sc_bus->devices[addr] == 0) 618 return (EINVAL); 619 if (len != 0) { 620 iov.iov_base = (void *)ur->ucr_data; 621 iov.iov_len = len; 622 uio.uio_iov = &iov; 623 uio.uio_iovcnt = 1; 624 uio.uio_resid = len; 625 uio.uio_offset = 0; 626 uio.uio_rw = 627 ur->ucr_request.bmRequestType & UT_READ ? 628 UIO_READ : UIO_WRITE; 629 uio.uio_vmspace = l->l_proc->p_vmspace; 630 ptr = malloc(len, M_TEMP, M_WAITOK); 631 if (uio.uio_rw == UIO_WRITE) { 632 error = uiomove(ptr, len, &uio); 633 if (error) 634 goto ret; 635 } 636 } 637 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 638 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 639 USBD_DEFAULT_TIMEOUT); 640 if (err) { 641 error = EIO; 642 goto ret; 643 } 644 if (len > ur->ucr_actlen) 645 len = ur->ucr_actlen; 646 if (len != 0) { 647 if (uio.uio_rw == UIO_READ) { 648 error = uiomove(ptr, len, &uio); 649 if (error) 650 goto ret; 651 } 652 } 653 ret: 654 if (ptr) 655 free(ptr, M_TEMP); 656 return (error); 657 } 658 659 case USB_DEVICEINFO: 660 { 661 usbd_device_handle dev; 662 struct usb_device_info *di = (void *)data; 663 int addr = di->udi_addr; 664 665 if (addr < 1 || addr >= USB_MAX_DEVICES) 666 return EINVAL; 667 if ((dev = sc->sc_bus->devices[addr]) == NULL) 668 return ENXIO; 669 usbd_fill_deviceinfo(dev, di, 1); 670 break; 671 } 672 673 #ifdef COMPAT_30 674 case USB_DEVICEINFO_OLD: 675 { 676 usbd_device_handle dev; 677 struct usb_device_info_old *di = (void *)data; 678 int addr = di->udi_addr; 679 680 if (addr < 1 || addr >= USB_MAX_DEVICES) 681 return EINVAL; 682 if ((dev = sc->sc_bus->devices[addr]) == NULL) 683 return ENXIO; 684 usbd_fill_deviceinfo_old(dev, di, 1); 685 break; 686 } 687 #endif 688 689 case USB_DEVICESTATS: 690 *(struct usb_device_stats *)data = sc->sc_bus->stats; 691 break; 692 693 default: 694 return (EINVAL); 695 } 696 return (0); 697 } 698 699 int 700 usbpoll(dev_t dev, int events, struct lwp *l) 701 { 702 int revents, mask, s; 703 704 if (minor(dev) == USB_DEV_MINOR) { 705 revents = 0; 706 mask = POLLIN | POLLRDNORM; 707 708 s = splusb(); 709 if (events & mask && usb_nevents > 0) 710 revents |= events & mask; 711 if (revents == 0 && events & mask) 712 selrecord(l, &usb_selevent); 713 splx(s); 714 715 return (revents); 716 } else { 717 return (0); 718 } 719 } 720 721 static void 722 filt_usbrdetach(struct knote *kn) 723 { 724 int s; 725 726 s = splusb(); 727 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 728 splx(s); 729 } 730 731 static int 732 filt_usbread(struct knote *kn, long hint) 733 { 734 735 if (usb_nevents == 0) 736 return (0); 737 738 kn->kn_data = sizeof(struct usb_event); 739 return (1); 740 } 741 742 static const struct filterops usbread_filtops = 743 { 1, NULL, filt_usbrdetach, filt_usbread }; 744 745 int 746 usbkqfilter(dev_t dev, struct knote *kn) 747 { 748 struct klist *klist; 749 int s; 750 751 switch (kn->kn_filter) { 752 case EVFILT_READ: 753 if (minor(dev) != USB_DEV_MINOR) 754 return (1); 755 klist = &usb_selevent.sel_klist; 756 kn->kn_fop = &usbread_filtops; 757 break; 758 759 default: 760 return (EINVAL); 761 } 762 763 kn->kn_hook = NULL; 764 765 s = splusb(); 766 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 767 splx(s); 768 769 return (0); 770 } 771 772 /* Explore device tree from the root. */ 773 Static void 774 usb_discover(struct usb_softc *sc) 775 { 776 777 DPRINTFN(2,("usb_discover\n")); 778 #ifdef USB_DEBUG 779 if (usb_noexplore > 1) 780 return; 781 #endif 782 /* 783 * We need mutual exclusion while traversing the device tree, 784 * but this is guaranteed since this function is only called 785 * from the event thread for the controller. 786 */ 787 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 788 sc->sc_bus->needs_explore = 0; 789 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 790 } 791 } 792 793 void 794 usb_needs_explore(usbd_device_handle dev) 795 { 796 DPRINTFN(2,("usb_needs_explore\n")); 797 dev->bus->needs_explore = 1; 798 wakeup(&dev->bus->needs_explore); 799 } 800 801 void 802 usb_needs_reattach(usbd_device_handle dev) 803 { 804 DPRINTFN(2,("usb_needs_reattach\n")); 805 dev->powersrc->reattach = 1; 806 dev->bus->needs_explore = 1; 807 wakeup(&dev->bus->needs_explore); 808 } 809 810 /* Called at splusb() */ 811 int 812 usb_get_next_event(struct usb_event *ue) 813 { 814 struct usb_event_q *ueq; 815 816 if (usb_nevents <= 0) 817 return (0); 818 ueq = SIMPLEQ_FIRST(&usb_events); 819 #ifdef DIAGNOSTIC 820 if (ueq == NULL) { 821 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 822 usb_nevents = 0; 823 return (0); 824 } 825 #endif 826 if (ue) 827 *ue = ueq->ue; 828 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 829 usb_free_event((struct usb_event *)(void *)ueq); 830 usb_nevents--; 831 return (1); 832 } 833 834 void 835 usbd_add_dev_event(int type, usbd_device_handle udev) 836 { 837 struct usb_event *ue = usb_alloc_event(); 838 839 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 840 usb_add_event(type, ue); 841 } 842 843 void 844 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 845 { 846 struct usb_event *ue = usb_alloc_event(); 847 848 ue->u.ue_driver.ue_cookie = udev->cookie; 849 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 850 sizeof ue->u.ue_driver.ue_devname); 851 usb_add_event(type, ue); 852 } 853 854 Static struct usb_event * 855 usb_alloc_event(void) 856 { 857 /* Yes, this is right; we allocate enough so that we can use it later */ 858 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 859 } 860 861 Static void 862 usb_free_event(struct usb_event *uep) 863 { 864 free(uep, M_USBDEV); 865 } 866 867 Static void 868 usb_add_event(int type, struct usb_event *uep) 869 { 870 struct usb_event_q *ueq; 871 struct timeval thetime; 872 int s; 873 874 microtime(&thetime); 875 /* Don't want to wait here inside splusb() */ 876 ueq = (struct usb_event_q *)(void *)uep; 877 ueq->ue = *uep; 878 ueq->ue.ue_type = type; 879 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 880 881 s = splusb(); 882 if (++usb_nevents >= USB_MAX_EVENTS) { 883 /* Too many queued events, drop an old one. */ 884 DPRINTFN(-1,("usb: event dropped\n")); 885 (void)usb_get_next_event(0); 886 } 887 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 888 wakeup(&usb_events); 889 selnotify(&usb_selevent, 0, 0); 890 if (usb_async_proc != NULL) { 891 softint_schedule(usb_async_sih); 892 } 893 splx(s); 894 } 895 896 Static void 897 usb_async_intr(void *cookie) 898 { 899 proc_t *proc; 900 901 mutex_enter(proc_lock); 902 if ((proc = usb_async_proc) != NULL) 903 psignal(proc, SIGIO); 904 mutex_exit(proc_lock); 905 } 906 907 void 908 usb_schedsoftintr(usbd_bus_handle bus) 909 { 910 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 911 if (bus->use_polling) { 912 bus->methods->soft_intr(bus); 913 } else { 914 softint_schedule(bus->soft); 915 } 916 } 917 918 int 919 usb_activate(device_t self, enum devact act) 920 { 921 struct usb_softc *sc = device_private(self); 922 923 switch (act) { 924 case DVACT_DEACTIVATE: 925 sc->sc_dying = 1; 926 return 0; 927 default: 928 return EOPNOTSUPP; 929 } 930 } 931 932 void 933 usb_childdet(device_t self, device_t child) 934 { 935 int i; 936 struct usb_softc *sc = device_private(self); 937 struct usbd_device *dev; 938 939 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 940 return; 941 942 for (i = 0; i < dev->subdevlen; i++) 943 if (dev->subdevs[i] == child) 944 dev->subdevs[i] = NULL; 945 } 946 947 int 948 usb_detach(device_t self, int flags) 949 { 950 struct usb_softc *sc = device_private(self); 951 struct usb_event *ue; 952 int rc; 953 954 DPRINTF(("usb_detach: start\n")); 955 956 /* Make all devices disconnect. */ 957 if (sc->sc_port.device != NULL && 958 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 959 return rc; 960 961 pmf_device_deregister(self); 962 /* Kill off event thread. */ 963 sc->sc_dying = 1; 964 while (sc->sc_event_thread != NULL) { 965 wakeup(&sc->sc_bus->needs_explore); 966 tsleep(sc, PWAIT, "usbdet", hz * 60); 967 } 968 DPRINTF(("usb_detach: event thread dead\n")); 969 970 if (sc->sc_bus->soft != NULL) { 971 softint_disestablish(sc->sc_bus->soft); 972 sc->sc_bus->soft = NULL; 973 } 974 975 ue = usb_alloc_event(); 976 ue->u.ue_ctrlr.ue_bus = device_unit(self); 977 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 978 979 return (0); 980 } 981 982 #ifdef COMPAT_30 983 Static void 984 usb_copy_old_devinfo(struct usb_device_info_old *uo, 985 const struct usb_device_info *ue) 986 { 987 const unsigned char *p; 988 unsigned char *q; 989 int i, n; 990 991 uo->udi_bus = ue->udi_bus; 992 uo->udi_addr = ue->udi_addr; 993 uo->udi_cookie = ue->udi_cookie; 994 for (i = 0, p = (const unsigned char *)ue->udi_product, 995 q = (unsigned char *)uo->udi_product; 996 *p && i < USB_MAX_STRING_LEN - 1; p++) { 997 if (*p < 0x80) 998 q[i++] = *p; 999 else { 1000 q[i++] = '?'; 1001 if ((*p & 0xe0) == 0xe0) 1002 p++; 1003 p++; 1004 } 1005 } 1006 q[i] = 0; 1007 1008 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1009 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1010 if (* p < 0x80) 1011 q[i++] = *p; 1012 else { 1013 q[i++] = '?'; 1014 p++; 1015 if ((*p & 0xe0) == 0xe0) 1016 p++; 1017 } 1018 } 1019 q[i] = 0; 1020 1021 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1022 1023 uo->udi_productNo = ue->udi_productNo; 1024 uo->udi_vendorNo = ue->udi_vendorNo; 1025 uo->udi_releaseNo = ue->udi_releaseNo; 1026 uo->udi_class = ue->udi_class; 1027 uo->udi_subclass = ue->udi_subclass; 1028 uo->udi_protocol = ue->udi_protocol; 1029 uo->udi_config = ue->udi_config; 1030 uo->udi_speed = ue->udi_speed; 1031 uo->udi_power = ue->udi_power; 1032 uo->udi_nports = ue->udi_nports; 1033 1034 for (n=0; n<USB_MAX_DEVNAMES; n++) 1035 memcpy(uo->udi_devnames[n], 1036 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1037 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1038 } 1039 #endif 1040
Indexes created Mon Sep 29 21:09:56 GMT 2025