usb.c revision 1.121
1 /* $NetBSD: usb.c,v 1.121 2010/05/29 01:14:29 pgoyette 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 1.121 2010/05/29 01:14:29 pgoyette 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) logprintf x 74 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf 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 USBBASEDEVICE 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 usb_proc_ptr 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 USB_ATTACH_ERROR_RETURN; 189 } 190 aprint_normal("\n"); 191 192 /* Try to load the usbverbose module */ 193 usb_verbose_ctl(true); 194 195 config_interrupts(self, usb_doattach); 196 } 197 198 static void 199 usb_doattach(device_t self) 200 { 201 static bool usb_selevent_init; /* XXX */ 202 struct usb_softc *sc = device_private(self); 203 usbd_device_handle dev; 204 usbd_status err; 205 int speed; 206 struct usb_event *ue; 207 208 if (!usb_selevent_init) { 209 selinit(&usb_selevent); 210 usb_selevent_init = true; 211 } 212 DPRINTF(("usbd_doattach\n")); 213 214 sc->sc_bus->usbctl = self; 215 sc->sc_port.power = USB_MAX_POWER; 216 217 switch (sc->sc_bus->usbrev) { 218 case USBREV_1_0: 219 case USBREV_1_1: 220 speed = USB_SPEED_FULL; 221 break; 222 case USBREV_2_0: 223 speed = USB_SPEED_HIGH; 224 break; 225 default: 226 panic("usb_doattach"); 227 } 228 229 ue = usb_alloc_event(); 230 ue->u.ue_ctrlr.ue_bus = device_unit(self); 231 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 232 233 #ifdef USB_USE_SOFTINTR 234 /* XXX we should have our own level */ 235 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 236 sc->sc_bus->methods->soft_intr, sc->sc_bus); 237 if (sc->sc_bus->soft == NULL) { 238 aprint_error("%s: can't register softintr\n", 239 device_xname(self)); 240 sc->sc_dying = 1; 241 USB_ATTACH_ERROR_RETURN; 242 } 243 #endif 244 245 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 246 &sc->sc_port); 247 if (!err) { 248 dev = sc->sc_port.device; 249 if (dev->hub == NULL) { 250 sc->sc_dying = 1; 251 aprint_error("%s: root device is not a hub\n", 252 device_xname(self)); 253 USB_ATTACH_ERROR_RETURN; 254 } 255 sc->sc_bus->root_hub = dev; 256 #if 1 257 /* 258 * Turning this code off will delay attachment of USB devices 259 * until the USB event thread is running, which means that 260 * the keyboard will not work until after cold boot. 261 */ 262 if (cold && (device_cfdata(self)->cf_flags & 1)) 263 dev->hub->explore(sc->sc_bus->root_hub); 264 #endif 265 } else { 266 aprint_error("%s: root hub problem, error=%d\n", 267 device_xname(self), err); 268 sc->sc_dying = 1; 269 } 270 271 config_pending_incr(); 272 usb_create_event_thread(self); 273 274 if (!pmf_device_register(self, NULL, NULL)) 275 aprint_error_dev(self, "couldn't establish power handler\n"); 276 277 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 278 usb_async_intr, NULL); 279 280 USB_ATTACH_SUCCESS_RETURN; 281 } 282 283 static const char *taskq_names[] = USB_TASKQ_NAMES; 284 285 void 286 usb_create_event_thread(device_t self) 287 { 288 struct usb_softc *sc = device_private(self); 289 struct usb_taskq *taskq; 290 int i; 291 292 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 293 &sc->sc_event_thread, "%s", device_xname(self))) { 294 printf("%s: unable to create event thread for\n", 295 device_xname(self)); 296 panic("usb_create_event_thread"); 297 } 298 for (i = 0; i < USB_NUM_TASKQS; i++) { 299 taskq = &usb_taskq[i]; 300 301 if (taskq->taskcreated) 302 continue; 303 304 TAILQ_INIT(&taskq->tasks); 305 taskq->taskcreated = 1; 306 taskq->name = taskq_names[i]; 307 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 308 taskq, &taskq->task_thread_lwp, taskq->name)) { 309 printf("unable to create task thread: %s\n", taskq->name); 310 panic("usb_create_event_thread task"); 311 } 312 } 313 } 314 315 /* 316 * Add a task to be performed by the task thread. This function can be 317 * called from any context and the task will be executed in a process 318 * context ASAP. 319 */ 320 void 321 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 322 { 323 struct usb_taskq *taskq; 324 int s; 325 326 taskq = &usb_taskq[queue]; 327 s = splusb(); 328 if (task->queue == -1) { 329 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 330 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 331 task->queue = queue; 332 } else { 333 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 334 } 335 wakeup(&taskq->tasks); 336 splx(s); 337 } 338 339 void 340 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 341 { 342 struct usb_taskq *taskq; 343 int s; 344 345 taskq = &usb_taskq[task->queue]; 346 s = splusb(); 347 if (task->queue != -1) { 348 TAILQ_REMOVE(&taskq->tasks, task, next); 349 task->queue = -1; 350 } 351 splx(s); 352 } 353 354 void 355 usb_event_thread(void *arg) 356 { 357 struct usb_softc *sc = arg; 358 359 DPRINTF(("usb_event_thread: start\n")); 360 361 /* 362 * In case this controller is a companion controller to an 363 * EHCI controller we need to wait until the EHCI controller 364 * has grabbed the port. 365 * XXX It would be nicer to do this with a tsleep(), but I don't 366 * know how to synchronize the creation of the threads so it 367 * will work. 368 */ 369 usb_delay_ms(sc->sc_bus, 500); 370 371 /* Make sure first discover does something. */ 372 sc->sc_bus->needs_explore = 1; 373 usb_discover(sc); 374 config_pending_decr(); 375 376 while (!sc->sc_dying) { 377 #ifdef USB_DEBUG 378 if (usb_noexplore < 2) 379 #endif 380 usb_discover(sc); 381 #ifdef USB_DEBUG 382 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 383 usb_noexplore ? 0 : hz * 60); 384 #else 385 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 386 hz * 60); 387 #endif 388 DPRINTFN(2,("usb_event_thread: woke up\n")); 389 } 390 sc->sc_event_thread = NULL; 391 392 /* In case parent is waiting for us to exit. */ 393 wakeup(sc); 394 395 DPRINTF(("usb_event_thread: exit\n")); 396 kthread_exit(0); 397 } 398 399 void 400 usb_task_thread(void *arg) 401 { 402 struct usb_task *task; 403 struct usb_taskq *taskq; 404 int s; 405 406 taskq = arg; 407 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 408 409 s = splusb(); 410 for (;;) { 411 task = TAILQ_FIRST(&taskq->tasks); 412 if (task == NULL) { 413 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 414 task = TAILQ_FIRST(&taskq->tasks); 415 } 416 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 417 if (task != NULL) { 418 TAILQ_REMOVE(&taskq->tasks, task, next); 419 task->queue = -1; 420 splx(s); 421 task->fun(task->arg); 422 s = splusb(); 423 } 424 } 425 } 426 427 int 428 usbctlprint(void *aux, const char *pnp) 429 { 430 /* only "usb"es can attach to host controllers */ 431 if (pnp) 432 aprint_normal("usb at %s", pnp); 433 434 return (UNCONF); 435 } 436 437 int 438 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 439 { 440 int unit = minor(dev); 441 struct usb_softc *sc; 442 443 if (unit == USB_DEV_MINOR) { 444 if (usb_dev_open) 445 return (EBUSY); 446 usb_dev_open = 1; 447 mutex_enter(proc_lock); 448 usb_async_proc = 0; 449 mutex_exit(proc_lock); 450 return (0); 451 } 452 453 sc = device_lookup_private(&usb_cd, unit); 454 if (!sc) 455 return (ENXIO); 456 457 if (sc->sc_dying) 458 return (EIO); 459 460 return (0); 461 } 462 463 int 464 usbread(dev_t dev, struct uio *uio, int flag) 465 { 466 struct usb_event *ue; 467 #ifdef COMPAT_30 468 struct usb_event_old *ueo = NULL; /* XXXGCC */ 469 #endif 470 int s, error, n, useold; 471 472 if (minor(dev) != USB_DEV_MINOR) 473 return (ENXIO); 474 475 useold = 0; 476 switch (uio->uio_resid) { 477 #ifdef COMPAT_30 478 case sizeof(struct usb_event_old): 479 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 480 M_WAITOK|M_ZERO); 481 useold = 1; 482 /* FALLTHRU */ 483 #endif 484 case sizeof(struct usb_event): 485 ue = usb_alloc_event(); 486 break; 487 default: 488 return (EINVAL); 489 } 490 491 error = 0; 492 s = splusb(); 493 for (;;) { 494 n = usb_get_next_event(ue); 495 if (n != 0) 496 break; 497 if (flag & IO_NDELAY) { 498 error = EWOULDBLOCK; 499 break; 500 } 501 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 502 if (error) 503 break; 504 } 505 splx(s); 506 if (!error) { 507 #ifdef COMPAT_30 508 if (useold) { /* copy fields to old struct */ 509 ueo->ue_type = ue->ue_type; 510 memcpy(&ueo->ue_time, &ue->ue_time, 511 sizeof(struct timespec)); 512 switch (ue->ue_type) { 513 case USB_EVENT_DEVICE_ATTACH: 514 case USB_EVENT_DEVICE_DETACH: 515 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 516 break; 517 518 case USB_EVENT_CTRLR_ATTACH: 519 case USB_EVENT_CTRLR_DETACH: 520 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 521 break; 522 523 case USB_EVENT_DRIVER_ATTACH: 524 case USB_EVENT_DRIVER_DETACH: 525 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 526 memcpy(ueo->u.ue_driver.ue_devname, 527 ue->u.ue_driver.ue_devname, 528 sizeof(ue->u.ue_driver.ue_devname)); 529 break; 530 default: 531 ; 532 } 533 534 error = uiomove((void *)ueo, sizeof *ueo, uio); 535 } else 536 #endif 537 error = uiomove((void *)ue, sizeof *ue, uio); 538 } 539 usb_free_event(ue); 540 #ifdef COMPAT_30 541 if (useold) 542 free(ueo, M_USBDEV); 543 #endif 544 545 return (error); 546 } 547 548 int 549 usbclose(dev_t dev, int flag, int mode, 550 struct lwp *l) 551 { 552 int unit = minor(dev); 553 554 if (unit == USB_DEV_MINOR) { 555 mutex_enter(proc_lock); 556 usb_async_proc = 0; 557 mutex_exit(proc_lock); 558 usb_dev_open = 0; 559 } 560 561 return (0); 562 } 563 564 int 565 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 566 { 567 struct usb_softc *sc; 568 int unit = minor(devt); 569 570 if (unit == USB_DEV_MINOR) { 571 switch (cmd) { 572 case FIONBIO: 573 /* All handled in the upper FS layer. */ 574 return (0); 575 576 case FIOASYNC: 577 mutex_enter(proc_lock); 578 if (*(int *)data) 579 usb_async_proc = l->l_proc; 580 else 581 usb_async_proc = 0; 582 mutex_exit(proc_lock); 583 return (0); 584 585 default: 586 return (EINVAL); 587 } 588 } 589 590 sc = device_lookup_private(&usb_cd, unit); 591 592 if (sc->sc_dying) 593 return (EIO); 594 595 switch (cmd) { 596 #ifdef USB_DEBUG 597 case USB_SETDEBUG: 598 if (!(flag & FWRITE)) 599 return (EBADF); 600 usbdebug = ((*(int *)data) & 0x000000ff); 601 break; 602 #endif /* USB_DEBUG */ 603 case USB_REQUEST: 604 { 605 struct usb_ctl_request *ur = (void *)data; 606 int len = UGETW(ur->ucr_request.wLength); 607 struct iovec iov; 608 struct uio uio; 609 void *ptr = 0; 610 int addr = ur->ucr_addr; 611 usbd_status err; 612 int error = 0; 613 614 if (!(flag & FWRITE)) 615 return (EBADF); 616 617 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 618 if (len < 0 || len > 32768) 619 return (EINVAL); 620 if (addr < 0 || addr >= USB_MAX_DEVICES || 621 sc->sc_bus->devices[addr] == 0) 622 return (EINVAL); 623 if (len != 0) { 624 iov.iov_base = (void *)ur->ucr_data; 625 iov.iov_len = len; 626 uio.uio_iov = &iov; 627 uio.uio_iovcnt = 1; 628 uio.uio_resid = len; 629 uio.uio_offset = 0; 630 uio.uio_rw = 631 ur->ucr_request.bmRequestType & UT_READ ? 632 UIO_READ : UIO_WRITE; 633 uio.uio_vmspace = l->l_proc->p_vmspace; 634 ptr = malloc(len, M_TEMP, M_WAITOK); 635 if (uio.uio_rw == UIO_WRITE) { 636 error = uiomove(ptr, len, &uio); 637 if (error) 638 goto ret; 639 } 640 } 641 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 642 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 643 USBD_DEFAULT_TIMEOUT); 644 if (err) { 645 error = EIO; 646 goto ret; 647 } 648 if (len > ur->ucr_actlen) 649 len = ur->ucr_actlen; 650 if (len != 0) { 651 if (uio.uio_rw == UIO_READ) { 652 error = uiomove(ptr, len, &uio); 653 if (error) 654 goto ret; 655 } 656 } 657 ret: 658 if (ptr) 659 free(ptr, M_TEMP); 660 return (error); 661 } 662 663 case USB_DEVICEINFO: 664 { 665 usbd_device_handle dev; 666 struct usb_device_info *di = (void *)data; 667 int addr = di->udi_addr; 668 669 if (addr < 1 || addr >= USB_MAX_DEVICES) 670 return EINVAL; 671 if ((dev = sc->sc_bus->devices[addr]) == NULL) 672 return ENXIO; 673 usbd_fill_deviceinfo(dev, di, 1); 674 break; 675 } 676 677 #ifdef COMPAT_30 678 case USB_DEVICEINFO_OLD: 679 { 680 usbd_device_handle dev; 681 struct usb_device_info_old *di = (void *)data; 682 int addr = di->udi_addr; 683 684 if (addr < 1 || addr >= USB_MAX_DEVICES) 685 return EINVAL; 686 if ((dev = sc->sc_bus->devices[addr]) == NULL) 687 return ENXIO; 688 usbd_fill_deviceinfo_old(dev, di, 1); 689 break; 690 } 691 #endif 692 693 case USB_DEVICESTATS: 694 *(struct usb_device_stats *)data = sc->sc_bus->stats; 695 break; 696 697 default: 698 return (EINVAL); 699 } 700 return (0); 701 } 702 703 int 704 usbpoll(dev_t dev, int events, struct lwp *l) 705 { 706 int revents, mask, s; 707 708 if (minor(dev) == USB_DEV_MINOR) { 709 revents = 0; 710 mask = POLLIN | POLLRDNORM; 711 712 s = splusb(); 713 if (events & mask && usb_nevents > 0) 714 revents |= events & mask; 715 if (revents == 0 && events & mask) 716 selrecord(l, &usb_selevent); 717 splx(s); 718 719 return (revents); 720 } else { 721 return (0); 722 } 723 } 724 725 static void 726 filt_usbrdetach(struct knote *kn) 727 { 728 int s; 729 730 s = splusb(); 731 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 732 splx(s); 733 } 734 735 static int 736 filt_usbread(struct knote *kn, long hint) 737 { 738 739 if (usb_nevents == 0) 740 return (0); 741 742 kn->kn_data = sizeof(struct usb_event); 743 return (1); 744 } 745 746 static const struct filterops usbread_filtops = 747 { 1, NULL, filt_usbrdetach, filt_usbread }; 748 749 int 750 usbkqfilter(dev_t dev, struct knote *kn) 751 { 752 struct klist *klist; 753 int s; 754 755 switch (kn->kn_filter) { 756 case EVFILT_READ: 757 if (minor(dev) != USB_DEV_MINOR) 758 return (1); 759 klist = &usb_selevent.sel_klist; 760 kn->kn_fop = &usbread_filtops; 761 break; 762 763 default: 764 return (EINVAL); 765 } 766 767 kn->kn_hook = NULL; 768 769 s = splusb(); 770 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 771 splx(s); 772 773 return (0); 774 } 775 776 /* Explore device tree from the root. */ 777 Static void 778 usb_discover(struct usb_softc *sc) 779 { 780 781 DPRINTFN(2,("usb_discover\n")); 782 #ifdef USB_DEBUG 783 if (usb_noexplore > 1) 784 return; 785 #endif 786 /* 787 * We need mutual exclusion while traversing the device tree, 788 * but this is guaranteed since this function is only called 789 * from the event thread for the controller. 790 */ 791 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 792 sc->sc_bus->needs_explore = 0; 793 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 794 } 795 } 796 797 void 798 usb_needs_explore(usbd_device_handle dev) 799 { 800 DPRINTFN(2,("usb_needs_explore\n")); 801 dev->bus->needs_explore = 1; 802 wakeup(&dev->bus->needs_explore); 803 } 804 805 void 806 usb_needs_reattach(usbd_device_handle dev) 807 { 808 DPRINTFN(2,("usb_needs_reattach\n")); 809 dev->powersrc->reattach = 1; 810 dev->bus->needs_explore = 1; 811 wakeup(&dev->bus->needs_explore); 812 } 813 814 /* Called at splusb() */ 815 int 816 usb_get_next_event(struct usb_event *ue) 817 { 818 struct usb_event_q *ueq; 819 820 if (usb_nevents <= 0) 821 return (0); 822 ueq = SIMPLEQ_FIRST(&usb_events); 823 #ifdef DIAGNOSTIC 824 if (ueq == NULL) { 825 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 826 usb_nevents = 0; 827 return (0); 828 } 829 #endif 830 if (ue) 831 *ue = ueq->ue; 832 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 833 usb_free_event((struct usb_event *)(void *)ueq); 834 usb_nevents--; 835 return (1); 836 } 837 838 void 839 usbd_add_dev_event(int type, usbd_device_handle udev) 840 { 841 struct usb_event *ue = usb_alloc_event(); 842 843 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 844 usb_add_event(type, ue); 845 } 846 847 void 848 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 849 { 850 struct usb_event *ue = usb_alloc_event(); 851 852 ue->u.ue_driver.ue_cookie = udev->cookie; 853 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 854 sizeof ue->u.ue_driver.ue_devname); 855 usb_add_event(type, ue); 856 } 857 858 Static struct usb_event * 859 usb_alloc_event(void) 860 { 861 /* Yes, this is right; we allocate enough so that we can use it later */ 862 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 863 } 864 865 Static void 866 usb_free_event(struct usb_event *uep) 867 { 868 free(uep, M_USBDEV); 869 } 870 871 Static void 872 usb_add_event(int type, struct usb_event *uep) 873 { 874 struct usb_event_q *ueq; 875 struct timeval thetime; 876 int s; 877 878 microtime(&thetime); 879 /* Don't want to wait here inside splusb() */ 880 ueq = (struct usb_event_q *)(void *)uep; 881 ueq->ue = *uep; 882 ueq->ue.ue_type = type; 883 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 884 885 s = splusb(); 886 if (++usb_nevents >= USB_MAX_EVENTS) { 887 /* Too many queued events, drop an old one. */ 888 DPRINTFN(-1,("usb: event dropped\n")); 889 (void)usb_get_next_event(0); 890 } 891 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 892 wakeup(&usb_events); 893 selnotify(&usb_selevent, 0, 0); 894 if (usb_async_proc != NULL) { 895 softint_schedule(usb_async_sih); 896 } 897 splx(s); 898 } 899 900 Static void 901 usb_async_intr(void *cookie) 902 { 903 proc_t *proc; 904 905 mutex_enter(proc_lock); 906 if ((proc = usb_async_proc) != NULL) 907 psignal(proc, SIGIO); 908 mutex_exit(proc_lock); 909 } 910 911 void 912 usb_schedsoftintr(usbd_bus_handle bus) 913 { 914 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 915 #ifdef USB_USE_SOFTINTR 916 if (bus->use_polling) { 917 bus->methods->soft_intr(bus); 918 } else { 919 softint_schedule(bus->soft); 920 } 921 #else 922 bus->methods->soft_intr(bus); 923 #endif /* USB_USE_SOFTINTR */ 924 } 925 926 int 927 usb_activate(device_t self, enum devact act) 928 { 929 struct usb_softc *sc = device_private(self); 930 931 switch (act) { 932 case DVACT_DEACTIVATE: 933 sc->sc_dying = 1; 934 return 0; 935 default: 936 return EOPNOTSUPP; 937 } 938 } 939 940 void 941 usb_childdet(device_t self, device_t child) 942 { 943 int i; 944 struct usb_softc *sc = device_private(self); 945 struct usbd_device *dev; 946 947 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 948 return; 949 950 for (i = 0; i < dev->subdevlen; i++) 951 if (dev->subdevs[i] == child) 952 dev->subdevs[i] = NULL; 953 } 954 955 int 956 usb_detach(device_t self, int flags) 957 { 958 struct usb_softc *sc = device_private(self); 959 struct usb_event *ue; 960 int rc; 961 962 DPRINTF(("usb_detach: start\n")); 963 964 /* Make all devices disconnect. */ 965 if (sc->sc_port.device != NULL && 966 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 967 return rc; 968 969 pmf_device_deregister(self); 970 /* Kill off event thread. */ 971 sc->sc_dying = 1; 972 while (sc->sc_event_thread != NULL) { 973 wakeup(&sc->sc_bus->needs_explore); 974 tsleep(sc, PWAIT, "usbdet", hz * 60); 975 } 976 DPRINTF(("usb_detach: event thread dead\n")); 977 978 #ifdef USB_USE_SOFTINTR 979 if (sc->sc_bus->soft != NULL) { 980 softint_disestablish(sc->sc_bus->soft); 981 sc->sc_bus->soft = NULL; 982 } 983 #endif 984 985 ue = usb_alloc_event(); 986 ue->u.ue_ctrlr.ue_bus = device_unit(self); 987 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 988 989 /* Try to unload the usbverbose module */ 990 usb_verbose_ctl(false); 991 992 return (0); 993 } 994 995 #ifdef COMPAT_30 996 Static void 997 usb_copy_old_devinfo(struct usb_device_info_old *uo, 998 const struct usb_device_info *ue) 999 { 1000 const unsigned char *p; 1001 unsigned char *q; 1002 int i, n; 1003 1004 uo->udi_bus = ue->udi_bus; 1005 uo->udi_addr = ue->udi_addr; 1006 uo->udi_cookie = ue->udi_cookie; 1007 for (i = 0, p = (const unsigned char *)ue->udi_product, 1008 q = (unsigned char *)uo->udi_product; 1009 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1010 if (*p < 0x80) 1011 q[i++] = *p; 1012 else { 1013 q[i++] = '?'; 1014 if ((*p & 0xe0) == 0xe0) 1015 p++; 1016 p++; 1017 } 1018 } 1019 q[i] = 0; 1020 1021 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1022 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1023 if (* p < 0x80) 1024 q[i++] = *p; 1025 else { 1026 q[i++] = '?'; 1027 p++; 1028 if ((*p & 0xe0) == 0xe0) 1029 p++; 1030 } 1031 } 1032 q[i] = 0; 1033 1034 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1035 1036 uo->udi_productNo = ue->udi_productNo; 1037 uo->udi_vendorNo = ue->udi_vendorNo; 1038 uo->udi_releaseNo = ue->udi_releaseNo; 1039 uo->udi_class = ue->udi_class; 1040 uo->udi_subclass = ue->udi_subclass; 1041 uo->udi_protocol = ue->udi_protocol; 1042 uo->udi_config = ue->udi_config; 1043 uo->udi_speed = ue->udi_speed; 1044 uo->udi_power = ue->udi_power; 1045 uo->udi_nports = ue->udi_nports; 1046 1047 for (n=0; n<USB_MAX_DEVNAMES; n++) 1048 memcpy(uo->udi_devnames[n], 1049 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1050 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1051 } 1052 #endif 1053
Indexes created Thu Sep 25 16:09:42 GMT 2025