usb.c revision 1.106
1 /* $NetBSD: usb.c,v 1.106 2008/02/18 05:24:24 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * USB specifications and other documentation can be found at 42 * http://www.usb.org/developers/docs/ and 43 * http://www.usb.org/developers/devclass_docs/ 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.106 2008/02/18 05:24:24 dyoung Exp $"); 48 49 #include "opt_compat_netbsd.h" 50 51 #include "ohci.h" 52 #include "uhci.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/device.h> 59 #include <sys/kthread.h> 60 #include <sys/proc.h> 61 #include <sys/conf.h> 62 #include <sys/fcntl.h> 63 #include <sys/poll.h> 64 #include <sys/select.h> 65 #include <sys/vnode.h> 66 #include <sys/signalvar.h> 67 #include <sys/intr.h> 68 69 #include <dev/usb/usb.h> 70 #include <dev/usb/usbdi.h> 71 #include <dev/usb/usbdi_util.h> 72 73 #define USB_DEV_MINOR 255 74 75 #include <sys/bus.h> 76 77 #include <dev/usb/usbdivar.h> 78 #include <dev/usb/usb_quirks.h> 79 80 #ifdef USB_DEBUG 81 #define DPRINTF(x) if (usbdebug) logprintf x 82 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 83 int usbdebug = 0; 84 #if defined(UHCI_DEBUG) && NUHCI > 0 85 extern int uhcidebug; 86 #endif 87 #if defined(OHCI_DEBUG) && NOHCI > 0 88 extern int ohcidebug; 89 #endif 90 /* 91 * 0 - do usual exploration 92 * 1 - do not use timeout exploration 93 * >1 - do no exploration 94 */ 95 int usb_noexplore = 0; 96 #else 97 #define DPRINTF(x) 98 #define DPRINTFN(n,x) 99 #endif 100 101 struct usb_softc { 102 USBBASEDEVICE sc_dev; /* base device */ 103 usbd_bus_handle sc_bus; /* USB controller */ 104 struct usbd_port sc_port; /* dummy port for root hub */ 105 106 struct lwp *sc_event_thread; 107 108 char sc_dying; 109 }; 110 111 struct usb_taskq { 112 TAILQ_HEAD(, usb_task) tasks; 113 struct lwp *task_thread_lwp; 114 const char *name; 115 int taskcreated; /* task thread exists. */ 116 }; 117 118 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 119 120 dev_type_open(usbopen); 121 dev_type_close(usbclose); 122 dev_type_read(usbread); 123 dev_type_ioctl(usbioctl); 124 dev_type_poll(usbpoll); 125 dev_type_kqfilter(usbkqfilter); 126 127 const struct cdevsw usb_cdevsw = { 128 usbopen, usbclose, usbread, nowrite, usbioctl, 129 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 130 }; 131 132 Static void usb_discover(void *); 133 Static void usb_create_event_thread(void *); 134 Static void usb_event_thread(void *); 135 Static void usb_task_thread(void *); 136 137 #define USB_MAX_EVENTS 100 138 struct usb_event_q { 139 struct usb_event ue; 140 SIMPLEQ_ENTRY(usb_event_q) next; 141 }; 142 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 143 SIMPLEQ_HEAD_INITIALIZER(usb_events); 144 Static int usb_nevents = 0; 145 Static struct selinfo usb_selevent; 146 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 147 Static int usb_dev_open = 0; 148 Static struct usb_event *usb_alloc_event(void); 149 Static void usb_free_event(struct usb_event *); 150 Static void usb_add_event(int, struct usb_event *); 151 152 Static int usb_get_next_event(struct usb_event *); 153 154 #ifdef COMPAT_30 155 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 156 #endif 157 158 Static const char *usbrev_str[] = USBREV_STR; 159 160 static int usb_match(device_t, struct cfdata *, void *); 161 static void usb_attach(device_t, device_t, void *); 162 static int usb_detach(device_t, int); 163 static int usb_activate(device_t, enum devact); 164 static void usb_childdet(device_t, device_t); 165 166 extern struct cfdriver usb_cd; 167 168 CFATTACH_DECL2(usb, sizeof(struct usb_softc), 169 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet); 170 171 USB_MATCH(usb) 172 { 173 DPRINTF(("usbd_match\n")); 174 return (UMATCH_GENERIC); 175 } 176 177 USB_ATTACH(usb) 178 { 179 struct usb_softc *sc = (struct usb_softc *)self; 180 usbd_device_handle dev; 181 usbd_status err; 182 int usbrev; 183 int speed; 184 struct usb_event *ue; 185 186 DPRINTF(("usbd_attach\n")); 187 188 sc->sc_bus = aux; 189 sc->sc_bus->usbctl = sc; 190 sc->sc_port.power = USB_MAX_POWER; 191 192 usbrev = sc->sc_bus->usbrev; 193 aprint_naive("\n"); 194 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 195 switch (usbrev) { 196 case USBREV_1_0: 197 case USBREV_1_1: 198 speed = USB_SPEED_FULL; 199 break; 200 case USBREV_2_0: 201 speed = USB_SPEED_HIGH; 202 break; 203 default: 204 aprint_error(", not supported\n"); 205 sc->sc_dying = 1; 206 USB_ATTACH_ERROR_RETURN; 207 } 208 aprint_normal("\n"); 209 210 /* Make sure not to use tsleep() if we are cold booting. */ 211 if (cold) 212 sc->sc_bus->use_polling++; 213 214 ue = usb_alloc_event(); 215 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 216 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 217 218 #ifdef USB_USE_SOFTINTR 219 /* XXX we should have our own level */ 220 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 221 sc->sc_bus->methods->soft_intr, sc->sc_bus); 222 if (sc->sc_bus->soft == NULL) { 223 aprint_error("%s: can't register softintr\n", USBDEVNAME(sc->sc_dev)); 224 sc->sc_dying = 1; 225 USB_ATTACH_ERROR_RETURN; 226 } 227 #endif 228 229 err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, speed, 0, 230 &sc->sc_port); 231 if (!err) { 232 dev = sc->sc_port.device; 233 if (dev->hub == NULL) { 234 sc->sc_dying = 1; 235 aprint_error("%s: root device is not a hub\n", 236 USBDEVNAME(sc->sc_dev)); 237 USB_ATTACH_ERROR_RETURN; 238 } 239 sc->sc_bus->root_hub = dev; 240 #if 1 241 /* 242 * Turning this code off will delay attachment of USB devices 243 * until the USB event thread is running, which means that 244 * the keyboard will not work until after cold boot. 245 */ 246 if (cold && (device_cfdata(&sc->sc_dev)->cf_flags & 1)) 247 dev->hub->explore(sc->sc_bus->root_hub); 248 #endif 249 } else { 250 aprint_error("%s: root hub problem, error=%d\n", 251 USBDEVNAME(sc->sc_dev), err); 252 sc->sc_dying = 1; 253 } 254 if (cold) 255 sc->sc_bus->use_polling--; 256 257 config_pending_incr(); 258 usb_kthread_create(usb_create_event_thread, sc); 259 260 if (!pmf_device_register(self, NULL, NULL)) 261 aprint_error_dev(self, "couldn't establish power handler\n"); 262 263 USB_ATTACH_SUCCESS_RETURN; 264 } 265 266 static const char *taskq_names[] = USB_TASKQ_NAMES; 267 268 #if defined(__NetBSD__) || defined(__OpenBSD__) 269 void 270 usb_create_event_thread(void *arg) 271 { 272 struct usb_softc *sc = arg; 273 struct usb_taskq *taskq; 274 int i; 275 276 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 277 &sc->sc_event_thread, "%s", sc->sc_dev.dv_xname)) { 278 printf("%s: unable to create event thread for\n", 279 sc->sc_dev.dv_xname); 280 panic("usb_create_event_thread"); 281 } 282 for (i = 0; i < USB_NUM_TASKQS; i++) { 283 taskq = &usb_taskq[i]; 284 285 if (taskq->taskcreated) 286 continue; 287 288 TAILQ_INIT(&taskq->tasks); 289 taskq->taskcreated = 1; 290 taskq->name = taskq_names[i]; 291 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 292 taskq, &taskq->task_thread_lwp, taskq->name)) { 293 printf("unable to create task thread: %s\n", taskq->name); 294 panic("usb_create_event_thread task"); 295 } 296 } 297 } 298 299 /* 300 * Add a task to be performed by the task thread. This function can be 301 * called from any context and the task will be executed in a process 302 * context ASAP. 303 */ 304 void 305 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 306 { 307 struct usb_taskq *taskq; 308 int s; 309 310 taskq = &usb_taskq[queue]; 311 s = splusb(); 312 if (task->queue == -1) { 313 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 314 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 315 task->queue = queue; 316 } else { 317 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 318 } 319 wakeup(&taskq->tasks); 320 splx(s); 321 } 322 323 void 324 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 325 { 326 struct usb_taskq *taskq; 327 int s; 328 329 taskq = &usb_taskq[task->queue]; 330 s = splusb(); 331 if (task->queue != -1) { 332 TAILQ_REMOVE(&taskq->tasks, task, next); 333 task->queue = -1; 334 } 335 splx(s); 336 } 337 338 void 339 usb_event_thread(void *arg) 340 { 341 struct usb_softc *sc = arg; 342 343 DPRINTF(("usb_event_thread: start\n")); 344 345 /* 346 * In case this controller is a companion controller to an 347 * EHCI controller we need to wait until the EHCI controller 348 * has grabbed the port. 349 * XXX It would be nicer to do this with a tsleep(), but I don't 350 * know how to synchronize the creation of the threads so it 351 * will work. 352 */ 353 usb_delay_ms(sc->sc_bus, 500); 354 355 /* Make sure first discover does something. */ 356 sc->sc_bus->needs_explore = 1; 357 usb_discover(sc); 358 config_pending_decr(); 359 360 while (!sc->sc_dying) { 361 #ifdef USB_DEBUG 362 if (usb_noexplore < 2) 363 #endif 364 usb_discover(sc); 365 #ifdef USB_DEBUG 366 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 367 usb_noexplore ? 0 : hz * 60); 368 #else 369 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 370 hz * 60); 371 #endif 372 DPRINTFN(2,("usb_event_thread: woke up\n")); 373 } 374 sc->sc_event_thread = NULL; 375 376 /* In case parent is waiting for us to exit. */ 377 wakeup(sc); 378 379 DPRINTF(("usb_event_thread: exit\n")); 380 kthread_exit(0); 381 } 382 383 void 384 usb_task_thread(void *arg) 385 { 386 struct usb_task *task; 387 struct usb_taskq *taskq; 388 int s; 389 390 taskq = arg; 391 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 392 393 s = splusb(); 394 for (;;) { 395 task = TAILQ_FIRST(&taskq->tasks); 396 if (task == NULL) { 397 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 398 task = TAILQ_FIRST(&taskq->tasks); 399 } 400 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 401 if (task != NULL) { 402 TAILQ_REMOVE(&taskq->tasks, task, next); 403 task->queue = -1; 404 splx(s); 405 task->fun(task->arg); 406 s = splusb(); 407 } 408 } 409 } 410 411 int 412 usbctlprint(void *aux, const char *pnp) 413 { 414 /* only "usb"es can attach to host controllers */ 415 if (pnp) 416 aprint_normal("usb at %s", pnp); 417 418 return (UNCONF); 419 } 420 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 421 422 int 423 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 424 { 425 int unit = minor(dev); 426 struct usb_softc *sc; 427 428 if (unit == USB_DEV_MINOR) { 429 if (usb_dev_open) 430 return (EBUSY); 431 usb_dev_open = 1; 432 usb_async_proc = 0; 433 return (0); 434 } 435 436 USB_GET_SC_OPEN(usb, unit, sc); 437 438 if (sc->sc_dying) 439 return (EIO); 440 441 return (0); 442 } 443 444 int 445 usbread(dev_t dev, struct uio *uio, int flag) 446 { 447 struct usb_event *ue; 448 #ifdef COMPAT_30 449 struct usb_event_old *ueo = NULL; /* XXXGCC */ 450 #endif 451 int s, error, n, useold; 452 453 if (minor(dev) != USB_DEV_MINOR) 454 return (ENXIO); 455 456 useold = 0; 457 switch (uio->uio_resid) { 458 #ifdef COMPAT_30 459 case sizeof(struct usb_event_old): 460 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 461 M_WAITOK|M_ZERO); 462 useold = 1; 463 /* FALLTHRU */ 464 #endif 465 case sizeof(struct usb_event): 466 ue = usb_alloc_event(); 467 break; 468 default: 469 return (EINVAL); 470 } 471 472 error = 0; 473 s = splusb(); 474 for (;;) { 475 n = usb_get_next_event(ue); 476 if (n != 0) 477 break; 478 if (flag & IO_NDELAY) { 479 error = EWOULDBLOCK; 480 break; 481 } 482 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 483 if (error) 484 break; 485 } 486 splx(s); 487 if (!error) { 488 #ifdef COMPAT_30 489 if (useold) { /* copy fields to old struct */ 490 ueo->ue_type = ue->ue_type; 491 memcpy(&ueo->ue_time, &ue->ue_time, 492 sizeof(struct timespec)); 493 switch (ue->ue_type) { 494 case USB_EVENT_DEVICE_ATTACH: 495 case USB_EVENT_DEVICE_DETACH: 496 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 497 break; 498 499 case USB_EVENT_CTRLR_ATTACH: 500 case USB_EVENT_CTRLR_DETACH: 501 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 502 break; 503 504 case USB_EVENT_DRIVER_ATTACH: 505 case USB_EVENT_DRIVER_DETACH: 506 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 507 memcpy(ueo->u.ue_driver.ue_devname, 508 ue->u.ue_driver.ue_devname, 509 sizeof(ue->u.ue_driver.ue_devname)); 510 break; 511 default: 512 ; 513 } 514 515 error = uiomove((void *)ueo, uio->uio_resid, uio); 516 } else 517 #endif 518 error = uiomove((void *)ue, uio->uio_resid, uio); 519 } 520 usb_free_event(ue); 521 #ifdef COMPAT_30 522 if (useold) 523 free(ueo, M_USBDEV); 524 #endif 525 526 return (error); 527 } 528 529 int 530 usbclose(dev_t dev, int flag, int mode, 531 struct lwp *l) 532 { 533 int unit = minor(dev); 534 535 if (unit == USB_DEV_MINOR) { 536 usb_async_proc = 0; 537 usb_dev_open = 0; 538 } 539 540 return (0); 541 } 542 543 int 544 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 545 { 546 struct usb_softc *sc; 547 int unit = minor(devt); 548 549 if (unit == USB_DEV_MINOR) { 550 switch (cmd) { 551 case FIONBIO: 552 /* All handled in the upper FS layer. */ 553 return (0); 554 555 case FIOASYNC: 556 if (*(int *)data) 557 usb_async_proc = l->l_proc; 558 else 559 usb_async_proc = 0; 560 return (0); 561 562 default: 563 return (EINVAL); 564 } 565 } 566 567 USB_GET_SC(usb, unit, sc); 568 569 if (sc->sc_dying) 570 return (EIO); 571 572 switch (cmd) { 573 #ifdef USB_DEBUG 574 case USB_SETDEBUG: 575 if (!(flag & FWRITE)) 576 return (EBADF); 577 usbdebug = ((*(int *)data) & 0x000000ff); 578 #if defined(UHCI_DEBUG) && NUHCI > 0 579 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 580 #endif 581 #if defined(OHCI_DEBUG) && NOHCI > 0 582 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 583 #endif 584 break; 585 #endif /* USB_DEBUG */ 586 case USB_REQUEST: 587 { 588 struct usb_ctl_request *ur = (void *)data; 589 int len = UGETW(ur->ucr_request.wLength); 590 struct iovec iov; 591 struct uio uio; 592 void *ptr = 0; 593 int addr = ur->ucr_addr; 594 usbd_status err; 595 int error = 0; 596 597 if (!(flag & FWRITE)) 598 return (EBADF); 599 600 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 601 if (len < 0 || len > 32768) 602 return (EINVAL); 603 if (addr < 0 || addr >= USB_MAX_DEVICES || 604 sc->sc_bus->devices[addr] == 0) 605 return (EINVAL); 606 if (len != 0) { 607 iov.iov_base = (void *)ur->ucr_data; 608 iov.iov_len = len; 609 uio.uio_iov = &iov; 610 uio.uio_iovcnt = 1; 611 uio.uio_resid = len; 612 uio.uio_offset = 0; 613 uio.uio_rw = 614 ur->ucr_request.bmRequestType & UT_READ ? 615 UIO_READ : UIO_WRITE; 616 uio.uio_vmspace = l->l_proc->p_vmspace; 617 ptr = malloc(len, M_TEMP, M_WAITOK); 618 if (uio.uio_rw == UIO_WRITE) { 619 error = uiomove(ptr, len, &uio); 620 if (error) 621 goto ret; 622 } 623 } 624 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 625 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 626 USBD_DEFAULT_TIMEOUT); 627 if (err) { 628 error = EIO; 629 goto ret; 630 } 631 if (len != 0) { 632 if (uio.uio_rw == UIO_READ) { 633 error = uiomove(ptr, len, &uio); 634 if (error) 635 goto ret; 636 } 637 } 638 ret: 639 if (ptr) 640 free(ptr, M_TEMP); 641 return (error); 642 } 643 644 case USB_DEVICEINFO: 645 { 646 usbd_device_handle dev; 647 struct usb_device_info *di = (void *)data; 648 int addr = di->udi_addr; 649 650 if (addr < 1 || addr >= USB_MAX_DEVICES) 651 return EINVAL; 652 if ((dev = sc->sc_bus->devices[addr]) == NULL) 653 return ENXIO; 654 usbd_fill_deviceinfo(dev, di, 1); 655 break; 656 } 657 658 #ifdef COMPAT_30 659 case USB_DEVICEINFO_OLD: 660 { 661 usbd_device_handle dev; 662 struct usb_device_info_old *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_old(dev, di, 1); 670 break; 671 } 672 #endif 673 674 case USB_DEVICESTATS: 675 *(struct usb_device_stats *)data = sc->sc_bus->stats; 676 break; 677 678 default: 679 return (EINVAL); 680 } 681 return (0); 682 } 683 684 int 685 usbpoll(dev_t dev, int events, struct lwp *l) 686 { 687 int revents, mask, s; 688 689 if (minor(dev) == USB_DEV_MINOR) { 690 revents = 0; 691 mask = POLLIN | POLLRDNORM; 692 693 s = splusb(); 694 if (events & mask && usb_nevents > 0) 695 revents |= events & mask; 696 if (revents == 0 && events & mask) 697 selrecord(l, &usb_selevent); 698 splx(s); 699 700 return (revents); 701 } else { 702 return (0); 703 } 704 } 705 706 static void 707 filt_usbrdetach(struct knote *kn) 708 { 709 int s; 710 711 s = splusb(); 712 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 713 splx(s); 714 } 715 716 static int 717 filt_usbread(struct knote *kn, long hint) 718 { 719 720 if (usb_nevents == 0) 721 return (0); 722 723 kn->kn_data = sizeof(struct usb_event); 724 return (1); 725 } 726 727 static const struct filterops usbread_filtops = 728 { 1, NULL, filt_usbrdetach, filt_usbread }; 729 730 int 731 usbkqfilter(dev_t dev, struct knote *kn) 732 { 733 struct klist *klist; 734 int s; 735 736 switch (kn->kn_filter) { 737 case EVFILT_READ: 738 if (minor(dev) != USB_DEV_MINOR) 739 return (1); 740 klist = &usb_selevent.sel_klist; 741 kn->kn_fop = &usbread_filtops; 742 break; 743 744 default: 745 return (EINVAL); 746 } 747 748 kn->kn_hook = NULL; 749 750 s = splusb(); 751 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 752 splx(s); 753 754 return (0); 755 } 756 757 /* Explore device tree from the root. */ 758 Static void 759 usb_discover(void *v) 760 { 761 struct usb_softc *sc = v; 762 763 DPRINTFN(2,("usb_discover\n")); 764 #ifdef USB_DEBUG 765 if (usb_noexplore > 1) 766 return; 767 #endif 768 /* 769 * We need mutual exclusion while traversing the device tree, 770 * but this is guaranteed since this function is only called 771 * from the event thread for the controller. 772 */ 773 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 774 sc->sc_bus->needs_explore = 0; 775 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 776 } 777 } 778 779 void 780 usb_needs_explore(usbd_device_handle dev) 781 { 782 DPRINTFN(2,("usb_needs_explore\n")); 783 dev->bus->needs_explore = 1; 784 wakeup(&dev->bus->needs_explore); 785 } 786 787 void 788 usb_needs_reattach(usbd_device_handle dev) 789 { 790 DPRINTFN(2,("usb_needs_reattach\n")); 791 dev->powersrc->reattach = 1; 792 dev->bus->needs_explore = 1; 793 wakeup(&dev->bus->needs_explore); 794 } 795 796 /* Called at splusb() */ 797 int 798 usb_get_next_event(struct usb_event *ue) 799 { 800 struct usb_event_q *ueq; 801 802 if (usb_nevents <= 0) 803 return (0); 804 ueq = SIMPLEQ_FIRST(&usb_events); 805 #ifdef DIAGNOSTIC 806 if (ueq == NULL) { 807 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 808 usb_nevents = 0; 809 return (0); 810 } 811 #endif 812 if (ue) 813 *ue = ueq->ue; 814 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 815 usb_free_event((struct usb_event *)(void *)ueq); 816 usb_nevents--; 817 return (1); 818 } 819 820 void 821 usbd_add_dev_event(int type, usbd_device_handle udev) 822 { 823 struct usb_event *ue = usb_alloc_event(); 824 825 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 826 usb_add_event(type, ue); 827 } 828 829 void 830 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 831 { 832 struct usb_event *ue = usb_alloc_event(); 833 834 ue->u.ue_driver.ue_cookie = udev->cookie; 835 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 836 sizeof ue->u.ue_driver.ue_devname); 837 usb_add_event(type, ue); 838 } 839 840 Static struct usb_event * 841 usb_alloc_event(void) 842 { 843 /* Yes, this is right; we allocate enough so that we can use it later */ 844 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 845 } 846 847 Static void 848 usb_free_event(struct usb_event *uep) 849 { 850 free(uep, M_USBDEV); 851 } 852 853 Static void 854 usb_add_event(int type, struct usb_event *uep) 855 { 856 struct usb_event_q *ueq; 857 struct timeval thetime; 858 int s; 859 860 microtime(&thetime); 861 /* Don't want to wait here inside splusb() */ 862 ueq = (struct usb_event_q *)(void *)uep; 863 ueq->ue = *uep; 864 ueq->ue.ue_type = type; 865 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 866 867 s = splusb(); 868 if (++usb_nevents >= USB_MAX_EVENTS) { 869 /* Too many queued events, drop an old one. */ 870 DPRINTFN(-1,("usb: event dropped\n")); 871 (void)usb_get_next_event(0); 872 } 873 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 874 wakeup(&usb_events); 875 selnotify(&usb_selevent, 0); 876 if (usb_async_proc != NULL) { 877 mutex_enter(&proclist_mutex); 878 psignal(usb_async_proc, SIGIO); 879 mutex_exit(&proclist_mutex); 880 } 881 splx(s); 882 } 883 884 void 885 usb_schedsoftintr(usbd_bus_handle bus) 886 { 887 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 888 #ifdef USB_USE_SOFTINTR 889 if (bus->use_polling) { 890 bus->methods->soft_intr(bus); 891 } else { 892 softint_schedule(bus->soft); 893 } 894 #else 895 bus->methods->soft_intr(bus); 896 #endif /* USB_USE_SOFTINTR */ 897 } 898 899 int 900 usb_activate(device_t self, enum devact act) 901 { 902 struct usb_softc *sc = device_private(self); 903 usbd_device_handle dev = sc->sc_port.device; 904 int i, rv = 0; 905 906 switch (act) { 907 case DVACT_ACTIVATE: 908 return (EOPNOTSUPP); 909 910 case DVACT_DEACTIVATE: 911 sc->sc_dying = 1; 912 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 913 for (i = 0; dev->subdevs[i]; i++) 914 rv |= config_deactivate(dev->subdevs[i]); 915 } 916 break; 917 } 918 return (rv); 919 } 920 921 void 922 usb_childdet(device_t self, device_t child) 923 { 924 int i, last = -1; 925 struct usb_softc *sc = device_private(self); 926 struct usbd_device *dev; 927 928 if ((dev = sc->sc_port.device) == NULL || dev->subdevs == NULL) 929 return; 930 931 for (i = 0; dev->subdevs[i] != NULL; i++) 932 last = i; 933 934 for (i = 0; dev->subdevs[i] != NULL; i++) { 935 if (dev->subdevs[i] == child) { 936 dev->subdevs[i] = dev->subdevs[last]; 937 dev->subdevs[last] = NULL; 938 } 939 } 940 } 941 942 int 943 usb_detach(device_t self, int flags) 944 { 945 struct usb_softc *sc = device_private(self); 946 struct usb_event *ue; 947 948 DPRINTF(("usb_detach: start\n")); 949 950 pmf_device_deregister(self); 951 /* Kill off event thread. */ 952 while (sc->sc_event_thread != NULL) { 953 wakeup(&sc->sc_bus->needs_explore); 954 tsleep(sc, PWAIT, "usbdet", hz * 60); 955 } 956 DPRINTF(("usb_detach: event thread dead\n")); 957 958 /* Make all devices disconnect. */ 959 if (sc->sc_port.device != NULL) 960 usb_disconnect_port(&sc->sc_port, self); 961 962 #ifdef USB_USE_SOFTINTR 963 if (sc->sc_bus->soft != NULL) { 964 softint_disestablish(sc->sc_bus->soft); 965 sc->sc_bus->soft = NULL; 966 } 967 #endif 968 969 ue = usb_alloc_event(); 970 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 971 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 972 973 return (0); 974 } 975 976 #ifdef COMPAT_30 977 Static void 978 usb_copy_old_devinfo(struct usb_device_info_old *uo, 979 const struct usb_device_info *ue) 980 { 981 const unsigned char *p; 982 unsigned char *q; 983 int i, n; 984 985 uo->udi_bus = ue->udi_bus; 986 uo->udi_addr = ue->udi_addr; 987 uo->udi_cookie = ue->udi_cookie; 988 for (i = 0, p = (const unsigned char *)ue->udi_product, 989 q = (unsigned char *)uo->udi_product; 990 *p && i < USB_MAX_STRING_LEN - 1; p++) { 991 if (*p < 0x80) 992 q[i++] = *p; 993 else { 994 q[i++] = '?'; 995 if ((*p & 0xe0) == 0xe0) 996 p++; 997 p++; 998 } 999 } 1000 q[i] = 0; 1001 1002 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1003 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1004 if (* p < 0x80) 1005 q[i++] = *p; 1006 else { 1007 q[i++] = '?'; 1008 p++; 1009 if ((*p & 0xe0) == 0xe0) 1010 p++; 1011 } 1012 } 1013 q[i] = 0; 1014 1015 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1016 1017 uo->udi_productNo = ue->udi_productNo; 1018 uo->udi_vendorNo = ue->udi_vendorNo; 1019 uo->udi_releaseNo = ue->udi_releaseNo; 1020 uo->udi_class = ue->udi_class; 1021 uo->udi_subclass = ue->udi_subclass; 1022 uo->udi_protocol = ue->udi_protocol; 1023 uo->udi_config = ue->udi_config; 1024 uo->udi_speed = ue->udi_speed; 1025 uo->udi_power = ue->udi_power; 1026 uo->udi_nports = ue->udi_nports; 1027 1028 for (n=0; n<USB_MAX_DEVNAMES; n++) 1029 memcpy(uo->udi_devnames[n], 1030 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1031 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1032 } 1033 #endif 1034
Indexes created Tue Sep 23 02:09:52 GMT 2025