usb.c revision 1.127
1 /* $NetBSD: usb.c,v 1.127 2011/12/23 00:51:48 jakllsch 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 1.127 2011/12/23 00:51:48 jakllsch 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 #ifdef USB_USE_SOFTINTR 232 /* XXX we should have our own level */ 233 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 234 sc->sc_bus->methods->soft_intr, sc->sc_bus); 235 if (sc->sc_bus->soft == NULL) { 236 aprint_error("%s: can't register softintr\n", 237 device_xname(self)); 238 sc->sc_dying = 1; 239 return; 240 } 241 #endif 242 243 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 244 &sc->sc_port); 245 if (!err) { 246 dev = sc->sc_port.device; 247 if (dev->hub == NULL) { 248 sc->sc_dying = 1; 249 aprint_error("%s: root device is not a hub\n", 250 device_xname(self)); 251 return; 252 } 253 sc->sc_bus->root_hub = dev; 254 #if 1 255 /* 256 * Turning this code off will delay attachment of USB devices 257 * until the USB event thread is running, which means that 258 * the keyboard will not work until after cold boot. 259 */ 260 if (cold && (device_cfdata(self)->cf_flags & 1)) 261 dev->hub->explore(sc->sc_bus->root_hub); 262 #endif 263 } else { 264 aprint_error("%s: root hub problem, error=%d\n", 265 device_xname(self), err); 266 sc->sc_dying = 1; 267 } 268 269 config_pending_incr(); 270 usb_create_event_thread(self); 271 272 if (!pmf_device_register(self, NULL, NULL)) 273 aprint_error_dev(self, "couldn't establish power handler\n"); 274 275 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 276 usb_async_intr, NULL); 277 278 return; 279 } 280 281 static const char *taskq_names[] = USB_TASKQ_NAMES; 282 283 void 284 usb_create_event_thread(device_t self) 285 { 286 struct usb_softc *sc = device_private(self); 287 struct usb_taskq *taskq; 288 int i; 289 290 if (kthread_create(PRI_NONE, 0, NULL, usb_event_thread, sc, 291 &sc->sc_event_thread, "%s", device_xname(self))) { 292 printf("%s: unable to create event thread for\n", 293 device_xname(self)); 294 panic("usb_create_event_thread"); 295 } 296 for (i = 0; i < USB_NUM_TASKQS; i++) { 297 taskq = &usb_taskq[i]; 298 299 if (taskq->taskcreated) 300 continue; 301 302 TAILQ_INIT(&taskq->tasks); 303 taskq->taskcreated = 1; 304 taskq->name = taskq_names[i]; 305 if (kthread_create(PRI_NONE, 0, NULL, usb_task_thread, 306 taskq, &taskq->task_thread_lwp, "%s", taskq->name)) { 307 printf("unable to create task thread: %s\n", taskq->name); 308 panic("usb_create_event_thread task"); 309 } 310 } 311 } 312 313 /* 314 * Add a task to be performed by the task thread. This function can be 315 * called from any context and the task will be executed in a process 316 * context ASAP. 317 */ 318 void 319 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 320 { 321 struct usb_taskq *taskq; 322 int s; 323 324 taskq = &usb_taskq[queue]; 325 s = splusb(); 326 if (task->queue == -1) { 327 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 328 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 329 task->queue = queue; 330 } else { 331 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 332 } 333 wakeup(&taskq->tasks); 334 splx(s); 335 } 336 337 void 338 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 339 { 340 struct usb_taskq *taskq; 341 int s; 342 343 taskq = &usb_taskq[task->queue]; 344 s = splusb(); 345 if (task->queue != -1) { 346 TAILQ_REMOVE(&taskq->tasks, task, next); 347 task->queue = -1; 348 } 349 splx(s); 350 } 351 352 void 353 usb_event_thread(void *arg) 354 { 355 struct usb_softc *sc = arg; 356 357 DPRINTF(("usb_event_thread: start\n")); 358 359 /* 360 * In case this controller is a companion controller to an 361 * EHCI controller we need to wait until the EHCI controller 362 * has grabbed the port. 363 * XXX It would be nicer to do this with a tsleep(), but I don't 364 * know how to synchronize the creation of the threads so it 365 * will work. 366 */ 367 usb_delay_ms(sc->sc_bus, 500); 368 369 /* Make sure first discover does something. */ 370 sc->sc_bus->needs_explore = 1; 371 usb_discover(sc); 372 config_pending_decr(); 373 374 while (!sc->sc_dying) { 375 #ifdef USB_DEBUG 376 if (usb_noexplore < 2) 377 #endif 378 usb_discover(sc); 379 #ifdef USB_DEBUG 380 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 381 usb_noexplore ? 0 : hz * 60); 382 #else 383 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 384 hz * 60); 385 #endif 386 DPRINTFN(2,("usb_event_thread: woke up\n")); 387 } 388 sc->sc_event_thread = NULL; 389 390 /* In case parent is waiting for us to exit. */ 391 wakeup(sc); 392 393 DPRINTF(("usb_event_thread: exit\n")); 394 kthread_exit(0); 395 } 396 397 void 398 usb_task_thread(void *arg) 399 { 400 struct usb_task *task; 401 struct usb_taskq *taskq; 402 int s; 403 404 taskq = arg; 405 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 406 407 s = splusb(); 408 for (;;) { 409 task = TAILQ_FIRST(&taskq->tasks); 410 if (task == NULL) { 411 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 412 task = TAILQ_FIRST(&taskq->tasks); 413 } 414 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 415 if (task != NULL) { 416 TAILQ_REMOVE(&taskq->tasks, task, next); 417 task->queue = -1; 418 splx(s); 419 task->fun(task->arg); 420 s = splusb(); 421 } 422 } 423 } 424 425 int 426 usbctlprint(void *aux, const char *pnp) 427 { 428 /* only "usb"es can attach to host controllers */ 429 if (pnp) 430 aprint_normal("usb at %s", pnp); 431 432 return (UNCONF); 433 } 434 435 int 436 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 437 { 438 int unit = minor(dev); 439 struct usb_softc *sc; 440 441 if (unit == USB_DEV_MINOR) { 442 if (usb_dev_open) 443 return (EBUSY); 444 usb_dev_open = 1; 445 mutex_enter(proc_lock); 446 usb_async_proc = 0; 447 mutex_exit(proc_lock); 448 return (0); 449 } 450 451 sc = device_lookup_private(&usb_cd, unit); 452 if (!sc) 453 return (ENXIO); 454 455 if (sc->sc_dying) 456 return (EIO); 457 458 return (0); 459 } 460 461 int 462 usbread(dev_t dev, struct uio *uio, int flag) 463 { 464 struct usb_event *ue; 465 #ifdef COMPAT_30 466 struct usb_event_old *ueo = NULL; /* XXXGCC */ 467 #endif 468 int s, error, n, useold; 469 470 if (minor(dev) != USB_DEV_MINOR) 471 return (ENXIO); 472 473 useold = 0; 474 switch (uio->uio_resid) { 475 #ifdef COMPAT_30 476 case sizeof(struct usb_event_old): 477 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 478 M_WAITOK|M_ZERO); 479 useold = 1; 480 /* FALLTHRU */ 481 #endif 482 case sizeof(struct usb_event): 483 ue = usb_alloc_event(); 484 break; 485 default: 486 return (EINVAL); 487 } 488 489 error = 0; 490 s = splusb(); 491 for (;;) { 492 n = usb_get_next_event(ue); 493 if (n != 0) 494 break; 495 if (flag & IO_NDELAY) { 496 error = EWOULDBLOCK; 497 break; 498 } 499 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 500 if (error) 501 break; 502 } 503 splx(s); 504 if (!error) { 505 #ifdef COMPAT_30 506 if (useold) { /* copy fields to old struct */ 507 ueo->ue_type = ue->ue_type; 508 memcpy(&ueo->ue_time, &ue->ue_time, 509 sizeof(struct timespec)); 510 switch (ue->ue_type) { 511 case USB_EVENT_DEVICE_ATTACH: 512 case USB_EVENT_DEVICE_DETACH: 513 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 514 break; 515 516 case USB_EVENT_CTRLR_ATTACH: 517 case USB_EVENT_CTRLR_DETACH: 518 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 519 break; 520 521 case USB_EVENT_DRIVER_ATTACH: 522 case USB_EVENT_DRIVER_DETACH: 523 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 524 memcpy(ueo->u.ue_driver.ue_devname, 525 ue->u.ue_driver.ue_devname, 526 sizeof(ue->u.ue_driver.ue_devname)); 527 break; 528 default: 529 ; 530 } 531 532 error = uiomove((void *)ueo, sizeof *ueo, uio); 533 } else 534 #endif 535 error = uiomove((void *)ue, sizeof *ue, uio); 536 } 537 usb_free_event(ue); 538 #ifdef COMPAT_30 539 if (useold) 540 free(ueo, M_USBDEV); 541 #endif 542 543 return (error); 544 } 545 546 int 547 usbclose(dev_t dev, int flag, int mode, 548 struct lwp *l) 549 { 550 int unit = minor(dev); 551 552 if (unit == USB_DEV_MINOR) { 553 mutex_enter(proc_lock); 554 usb_async_proc = 0; 555 mutex_exit(proc_lock); 556 usb_dev_open = 0; 557 } 558 559 return (0); 560 } 561 562 int 563 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 564 { 565 struct usb_softc *sc; 566 int unit = minor(devt); 567 568 if (unit == USB_DEV_MINOR) { 569 switch (cmd) { 570 case FIONBIO: 571 /* All handled in the upper FS layer. */ 572 return (0); 573 574 case FIOASYNC: 575 mutex_enter(proc_lock); 576 if (*(int *)data) 577 usb_async_proc = l->l_proc; 578 else 579 usb_async_proc = 0; 580 mutex_exit(proc_lock); 581 return (0); 582 583 default: 584 return (EINVAL); 585 } 586 } 587 588 sc = device_lookup_private(&usb_cd, unit); 589 590 if (sc->sc_dying) 591 return (EIO); 592 593 switch (cmd) { 594 #ifdef USB_DEBUG 595 case USB_SETDEBUG: 596 if (!(flag & FWRITE)) 597 return (EBADF); 598 usbdebug = ((*(int *)data) & 0x000000ff); 599 break; 600 #endif /* USB_DEBUG */ 601 case USB_REQUEST: 602 { 603 struct usb_ctl_request *ur = (void *)data; 604 int len = UGETW(ur->ucr_request.wLength); 605 struct iovec iov; 606 struct uio uio; 607 void *ptr = 0; 608 int addr = ur->ucr_addr; 609 usbd_status err; 610 int error = 0; 611 612 if (!(flag & FWRITE)) 613 return (EBADF); 614 615 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 616 if (len < 0 || len > 32768) 617 return (EINVAL); 618 if (addr < 0 || addr >= USB_MAX_DEVICES || 619 sc->sc_bus->devices[addr] == 0) 620 return (EINVAL); 621 if (len != 0) { 622 iov.iov_base = (void *)ur->ucr_data; 623 iov.iov_len = len; 624 uio.uio_iov = &iov; 625 uio.uio_iovcnt = 1; 626 uio.uio_resid = len; 627 uio.uio_offset = 0; 628 uio.uio_rw = 629 ur->ucr_request.bmRequestType & UT_READ ? 630 UIO_READ : UIO_WRITE; 631 uio.uio_vmspace = l->l_proc->p_vmspace; 632 ptr = malloc(len, M_TEMP, M_WAITOK); 633 if (uio.uio_rw == UIO_WRITE) { 634 error = uiomove(ptr, len, &uio); 635 if (error) 636 goto ret; 637 } 638 } 639 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 640 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 641 USBD_DEFAULT_TIMEOUT); 642 if (err) { 643 error = EIO; 644 goto ret; 645 } 646 if (len > ur->ucr_actlen) 647 len = ur->ucr_actlen; 648 if (len != 0) { 649 if (uio.uio_rw == UIO_READ) { 650 error = uiomove(ptr, len, &uio); 651 if (error) 652 goto ret; 653 } 654 } 655 ret: 656 if (ptr) 657 free(ptr, M_TEMP); 658 return (error); 659 } 660 661 case USB_DEVICEINFO: 662 { 663 usbd_device_handle dev; 664 struct usb_device_info *di = (void *)data; 665 int addr = di->udi_addr; 666 667 if (addr < 1 || addr >= USB_MAX_DEVICES) 668 return EINVAL; 669 if ((dev = sc->sc_bus->devices[addr]) == NULL) 670 return ENXIO; 671 usbd_fill_deviceinfo(dev, di, 1); 672 break; 673 } 674 675 #ifdef COMPAT_30 676 case USB_DEVICEINFO_OLD: 677 { 678 usbd_device_handle dev; 679 struct usb_device_info_old *di = (void *)data; 680 int addr = di->udi_addr; 681 682 if (addr < 1 || addr >= USB_MAX_DEVICES) 683 return EINVAL; 684 if ((dev = sc->sc_bus->devices[addr]) == NULL) 685 return ENXIO; 686 usbd_fill_deviceinfo_old(dev, di, 1); 687 break; 688 } 689 #endif 690 691 case USB_DEVICESTATS: 692 *(struct usb_device_stats *)data = sc->sc_bus->stats; 693 break; 694 695 default: 696 return (EINVAL); 697 } 698 return (0); 699 } 700 701 int 702 usbpoll(dev_t dev, int events, struct lwp *l) 703 { 704 int revents, mask, s; 705 706 if (minor(dev) == USB_DEV_MINOR) { 707 revents = 0; 708 mask = POLLIN | POLLRDNORM; 709 710 s = splusb(); 711 if (events & mask && usb_nevents > 0) 712 revents |= events & mask; 713 if (revents == 0 && events & mask) 714 selrecord(l, &usb_selevent); 715 splx(s); 716 717 return (revents); 718 } else { 719 return (0); 720 } 721 } 722 723 static void 724 filt_usbrdetach(struct knote *kn) 725 { 726 int s; 727 728 s = splusb(); 729 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 730 splx(s); 731 } 732 733 static int 734 filt_usbread(struct knote *kn, long hint) 735 { 736 737 if (usb_nevents == 0) 738 return (0); 739 740 kn->kn_data = sizeof(struct usb_event); 741 return (1); 742 } 743 744 static const struct filterops usbread_filtops = 745 { 1, NULL, filt_usbrdetach, filt_usbread }; 746 747 int 748 usbkqfilter(dev_t dev, struct knote *kn) 749 { 750 struct klist *klist; 751 int s; 752 753 switch (kn->kn_filter) { 754 case EVFILT_READ: 755 if (minor(dev) != USB_DEV_MINOR) 756 return (1); 757 klist = &usb_selevent.sel_klist; 758 kn->kn_fop = &usbread_filtops; 759 break; 760 761 default: 762 return (EINVAL); 763 } 764 765 kn->kn_hook = NULL; 766 767 s = splusb(); 768 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 769 splx(s); 770 771 return (0); 772 } 773 774 /* Explore device tree from the root. */ 775 Static void 776 usb_discover(struct usb_softc *sc) 777 { 778 779 DPRINTFN(2,("usb_discover\n")); 780 #ifdef USB_DEBUG 781 if (usb_noexplore > 1) 782 return; 783 #endif 784 /* 785 * We need mutual exclusion while traversing the device tree, 786 * but this is guaranteed since this function is only called 787 * from the event thread for the controller. 788 */ 789 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 790 sc->sc_bus->needs_explore = 0; 791 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 792 } 793 } 794 795 void 796 usb_needs_explore(usbd_device_handle dev) 797 { 798 DPRINTFN(2,("usb_needs_explore\n")); 799 dev->bus->needs_explore = 1; 800 wakeup(&dev->bus->needs_explore); 801 } 802 803 void 804 usb_needs_reattach(usbd_device_handle dev) 805 { 806 DPRINTFN(2,("usb_needs_reattach\n")); 807 dev->powersrc->reattach = 1; 808 dev->bus->needs_explore = 1; 809 wakeup(&dev->bus->needs_explore); 810 } 811 812 /* Called at splusb() */ 813 int 814 usb_get_next_event(struct usb_event *ue) 815 { 816 struct usb_event_q *ueq; 817 818 if (usb_nevents <= 0) 819 return (0); 820 ueq = SIMPLEQ_FIRST(&usb_events); 821 #ifdef DIAGNOSTIC 822 if (ueq == NULL) { 823 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 824 usb_nevents = 0; 825 return (0); 826 } 827 #endif 828 if (ue) 829 *ue = ueq->ue; 830 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 831 usb_free_event((struct usb_event *)(void *)ueq); 832 usb_nevents--; 833 return (1); 834 } 835 836 void 837 usbd_add_dev_event(int type, usbd_device_handle udev) 838 { 839 struct usb_event *ue = usb_alloc_event(); 840 841 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 842 usb_add_event(type, ue); 843 } 844 845 void 846 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 847 { 848 struct usb_event *ue = usb_alloc_event(); 849 850 ue->u.ue_driver.ue_cookie = udev->cookie; 851 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 852 sizeof ue->u.ue_driver.ue_devname); 853 usb_add_event(type, ue); 854 } 855 856 Static struct usb_event * 857 usb_alloc_event(void) 858 { 859 /* Yes, this is right; we allocate enough so that we can use it later */ 860 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 861 } 862 863 Static void 864 usb_free_event(struct usb_event *uep) 865 { 866 free(uep, M_USBDEV); 867 } 868 869 Static void 870 usb_add_event(int type, struct usb_event *uep) 871 { 872 struct usb_event_q *ueq; 873 struct timeval thetime; 874 int s; 875 876 microtime(&thetime); 877 /* Don't want to wait here inside splusb() */ 878 ueq = (struct usb_event_q *)(void *)uep; 879 ueq->ue = *uep; 880 ueq->ue.ue_type = type; 881 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 882 883 s = splusb(); 884 if (++usb_nevents >= USB_MAX_EVENTS) { 885 /* Too many queued events, drop an old one. */ 886 DPRINTFN(-1,("usb: event dropped\n")); 887 (void)usb_get_next_event(0); 888 } 889 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 890 wakeup(&usb_events); 891 selnotify(&usb_selevent, 0, 0); 892 if (usb_async_proc != NULL) { 893 softint_schedule(usb_async_sih); 894 } 895 splx(s); 896 } 897 898 Static void 899 usb_async_intr(void *cookie) 900 { 901 proc_t *proc; 902 903 mutex_enter(proc_lock); 904 if ((proc = usb_async_proc) != NULL) 905 psignal(proc, SIGIO); 906 mutex_exit(proc_lock); 907 } 908 909 void 910 usb_schedsoftintr(usbd_bus_handle bus) 911 { 912 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 913 #ifdef USB_USE_SOFTINTR 914 if (bus->use_polling) { 915 bus->methods->soft_intr(bus); 916 } else { 917 softint_schedule(bus->soft); 918 } 919 #else 920 bus->methods->soft_intr(bus); 921 #endif /* USB_USE_SOFTINTR */ 922 } 923 924 int 925 usb_activate(device_t self, enum devact act) 926 { 927 struct usb_softc *sc = device_private(self); 928 929 switch (act) { 930 case DVACT_DEACTIVATE: 931 sc->sc_dying = 1; 932 return 0; 933 default: 934 return EOPNOTSUPP; 935 } 936 } 937 938 void 939 usb_childdet(device_t self, device_t child) 940 { 941 int i; 942 struct usb_softc *sc = device_private(self); 943 struct usbd_device *dev; 944 945 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 946 return; 947 948 for (i = 0; i < dev->subdevlen; i++) 949 if (dev->subdevs[i] == child) 950 dev->subdevs[i] = NULL; 951 } 952 953 int 954 usb_detach(device_t self, int flags) 955 { 956 struct usb_softc *sc = device_private(self); 957 struct usb_event *ue; 958 int rc; 959 960 DPRINTF(("usb_detach: start\n")); 961 962 /* Make all devices disconnect. */ 963 if (sc->sc_port.device != NULL && 964 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 965 return rc; 966 967 pmf_device_deregister(self); 968 /* Kill off event thread. */ 969 sc->sc_dying = 1; 970 while (sc->sc_event_thread != NULL) { 971 wakeup(&sc->sc_bus->needs_explore); 972 tsleep(sc, PWAIT, "usbdet", hz * 60); 973 } 974 DPRINTF(("usb_detach: event thread dead\n")); 975 976 #ifdef USB_USE_SOFTINTR 977 if (sc->sc_bus->soft != NULL) { 978 softint_disestablish(sc->sc_bus->soft); 979 sc->sc_bus->soft = NULL; 980 } 981 #endif 982 983 ue = usb_alloc_event(); 984 ue->u.ue_ctrlr.ue_bus = device_unit(self); 985 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 986 987 return (0); 988 } 989 990 #ifdef COMPAT_30 991 Static void 992 usb_copy_old_devinfo(struct usb_device_info_old *uo, 993 const struct usb_device_info *ue) 994 { 995 const unsigned char *p; 996 unsigned char *q; 997 int i, n; 998 999 uo->udi_bus = ue->udi_bus; 1000 uo->udi_addr = ue->udi_addr; 1001 uo->udi_cookie = ue->udi_cookie; 1002 for (i = 0, p = (const unsigned char *)ue->udi_product, 1003 q = (unsigned char *)uo->udi_product; 1004 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1005 if (*p < 0x80) 1006 q[i++] = *p; 1007 else { 1008 q[i++] = '?'; 1009 if ((*p & 0xe0) == 0xe0) 1010 p++; 1011 p++; 1012 } 1013 } 1014 q[i] = 0; 1015 1016 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1017 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1018 if (* p < 0x80) 1019 q[i++] = *p; 1020 else { 1021 q[i++] = '?'; 1022 p++; 1023 if ((*p & 0xe0) == 0xe0) 1024 p++; 1025 } 1026 } 1027 q[i] = 0; 1028 1029 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1030 1031 uo->udi_productNo = ue->udi_productNo; 1032 uo->udi_vendorNo = ue->udi_vendorNo; 1033 uo->udi_releaseNo = ue->udi_releaseNo; 1034 uo->udi_class = ue->udi_class; 1035 uo->udi_subclass = ue->udi_subclass; 1036 uo->udi_protocol = ue->udi_protocol; 1037 uo->udi_config = ue->udi_config; 1038 uo->udi_speed = ue->udi_speed; 1039 uo->udi_power = ue->udi_power; 1040 uo->udi_nports = ue->udi_nports; 1041 1042 for (n=0; n<USB_MAX_DEVNAMES; n++) 1043 memcpy(uo->udi_devnames[n], 1044 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1045 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1046 } 1047 #endif 1048
Indexes created Thu Sep 25 08:09:54 GMT 2025