usb.c revision 1.109
1 /* $NetBSD: usb.c,v 1.109 2008/03/28 17:14:46 drochner 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 1.109 2008/03/28 17:14:46 drochner 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 #if 0 103 USBBASEDEVICE sc_dev; /* base device */ 104 #endif 105 usbd_bus_handle sc_bus; /* USB controller */ 106 struct usbd_port sc_port; /* dummy port for root hub */ 107 108 struct lwp *sc_event_thread; 109 110 char sc_dying; 111 }; 112 113 struct usb_taskq { 114 TAILQ_HEAD(, usb_task) tasks; 115 struct lwp *task_thread_lwp; 116 const char *name; 117 int taskcreated; /* task thread exists. */ 118 }; 119 120 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 121 122 dev_type_open(usbopen); 123 dev_type_close(usbclose); 124 dev_type_read(usbread); 125 dev_type_ioctl(usbioctl); 126 dev_type_poll(usbpoll); 127 dev_type_kqfilter(usbkqfilter); 128 129 const struct cdevsw usb_cdevsw = { 130 usbopen, usbclose, usbread, nowrite, usbioctl, 131 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 132 }; 133 134 Static void usb_discover(struct usb_softc *); 135 Static void usb_create_event_thread(device_t); 136 Static void usb_event_thread(void *); 137 Static void usb_task_thread(void *); 138 139 #define USB_MAX_EVENTS 100 140 struct usb_event_q { 141 struct usb_event ue; 142 SIMPLEQ_ENTRY(usb_event_q) next; 143 }; 144 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 145 SIMPLEQ_HEAD_INITIALIZER(usb_events); 146 Static int usb_nevents = 0; 147 Static struct selinfo usb_selevent; 148 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 149 Static int usb_dev_open = 0; 150 Static struct usb_event *usb_alloc_event(void); 151 Static void usb_free_event(struct usb_event *); 152 Static void usb_add_event(int, struct usb_event *); 153 154 Static int usb_get_next_event(struct usb_event *); 155 156 #ifdef COMPAT_30 157 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 158 #endif 159 160 Static const char *usbrev_str[] = USBREV_STR; 161 162 static int usb_match(device_t, struct cfdata *, void *); 163 static void usb_attach(device_t, device_t, void *); 164 static int usb_detach(device_t, int); 165 static int usb_activate(device_t, enum devact); 166 static void usb_childdet(device_t, device_t); 167 168 extern struct cfdriver usb_cd; 169 170 CFATTACH_DECL2_NEW(usb, sizeof(struct usb_softc), 171 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet); 172 173 USB_MATCH(usb) 174 { 175 DPRINTF(("usbd_match\n")); 176 return (UMATCH_GENERIC); 177 } 178 179 USB_ATTACH(usb) 180 { 181 static bool usb_selevent_init; /* XXX */ 182 struct usb_softc *sc = device_private(self); 183 usbd_device_handle dev; 184 usbd_status err; 185 int usbrev; 186 int speed; 187 struct usb_event *ue; 188 189 if (!usb_selevent_init) { 190 selinit(&usb_selevent); 191 usb_selevent_init = true; 192 } 193 DPRINTF(("usbd_attach\n")); 194 195 sc->sc_bus = aux; 196 sc->sc_bus->usbctl = self; 197 sc->sc_port.power = USB_MAX_POWER; 198 199 usbrev = sc->sc_bus->usbrev; 200 aprint_naive("\n"); 201 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 202 switch (usbrev) { 203 case USBREV_1_0: 204 case USBREV_1_1: 205 speed = USB_SPEED_FULL; 206 break; 207 case USBREV_2_0: 208 speed = USB_SPEED_HIGH; 209 break; 210 default: 211 aprint_error(", not supported\n"); 212 sc->sc_dying = 1; 213 USB_ATTACH_ERROR_RETURN; 214 } 215 aprint_normal("\n"); 216 217 /* Make sure not to use tsleep() if we are cold booting. */ 218 if (cold) 219 sc->sc_bus->use_polling++; 220 221 ue = usb_alloc_event(); 222 ue->u.ue_ctrlr.ue_bus = device_unit(self); 223 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 224 225 #ifdef USB_USE_SOFTINTR 226 /* XXX we should have our own level */ 227 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 228 sc->sc_bus->methods->soft_intr, sc->sc_bus); 229 if (sc->sc_bus->soft == NULL) { 230 aprint_error("%s: can't register softintr\n", 231 device_xname(self)); 232 sc->sc_dying = 1; 233 USB_ATTACH_ERROR_RETURN; 234 } 235 #endif 236 237 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 238 &sc->sc_port); 239 if (!err) { 240 dev = sc->sc_port.device; 241 if (dev->hub == NULL) { 242 sc->sc_dying = 1; 243 aprint_error("%s: root device is not a hub\n", 244 device_xname(self)); 245 USB_ATTACH_ERROR_RETURN; 246 } 247 sc->sc_bus->root_hub = dev; 248 #if 1 249 /* 250 * Turning this code off will delay attachment of USB devices 251 * until the USB event thread is running, which means that 252 * the keyboard will not work until after cold boot. 253 */ 254 if (cold && (device_cfdata(self)->cf_flags & 1)) 255 dev->hub->explore(sc->sc_bus->root_hub); 256 #endif 257 } else { 258 aprint_error("%s: root hub problem, error=%d\n", 259 device_xname(self), err); 260 sc->sc_dying = 1; 261 } 262 if (cold) 263 sc->sc_bus->use_polling--; 264 265 config_pending_incr(); 266 usb_create_event_thread(self); 267 268 if (!pmf_device_register(self, NULL, NULL)) 269 aprint_error_dev(self, "couldn't establish power handler\n"); 270 271 USB_ATTACH_SUCCESS_RETURN; 272 } 273 274 static const char *taskq_names[] = USB_TASKQ_NAMES; 275 276 #if defined(__NetBSD__) || defined(__OpenBSD__) 277 void 278 usb_create_event_thread(device_t self) 279 { 280 struct usb_softc *sc = device_private(self); 281 struct usb_taskq *taskq; 282 int i; 283 284 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 285 &sc->sc_event_thread, "%s", device_xname(self))) { 286 printf("%s: unable to create event thread for\n", 287 device_xname(self)); 288 panic("usb_create_event_thread"); 289 } 290 for (i = 0; i < USB_NUM_TASKQS; i++) { 291 taskq = &usb_taskq[i]; 292 293 if (taskq->taskcreated) 294 continue; 295 296 TAILQ_INIT(&taskq->tasks); 297 taskq->taskcreated = 1; 298 taskq->name = taskq_names[i]; 299 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 300 taskq, &taskq->task_thread_lwp, taskq->name)) { 301 printf("unable to create task thread: %s\n", taskq->name); 302 panic("usb_create_event_thread task"); 303 } 304 } 305 } 306 307 /* 308 * Add a task to be performed by the task thread. This function can be 309 * called from any context and the task will be executed in a process 310 * context ASAP. 311 */ 312 void 313 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 314 { 315 struct usb_taskq *taskq; 316 int s; 317 318 taskq = &usb_taskq[queue]; 319 s = splusb(); 320 if (task->queue == -1) { 321 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 322 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 323 task->queue = queue; 324 } else { 325 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 326 } 327 wakeup(&taskq->tasks); 328 splx(s); 329 } 330 331 void 332 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 333 { 334 struct usb_taskq *taskq; 335 int s; 336 337 taskq = &usb_taskq[task->queue]; 338 s = splusb(); 339 if (task->queue != -1) { 340 TAILQ_REMOVE(&taskq->tasks, task, next); 341 task->queue = -1; 342 } 343 splx(s); 344 } 345 346 void 347 usb_event_thread(void *arg) 348 { 349 struct usb_softc *sc = arg; 350 351 DPRINTF(("usb_event_thread: start\n")); 352 353 /* 354 * In case this controller is a companion controller to an 355 * EHCI controller we need to wait until the EHCI controller 356 * has grabbed the port. 357 * XXX It would be nicer to do this with a tsleep(), but I don't 358 * know how to synchronize the creation of the threads so it 359 * will work. 360 */ 361 usb_delay_ms(sc->sc_bus, 500); 362 363 /* Make sure first discover does something. */ 364 sc->sc_bus->needs_explore = 1; 365 usb_discover(sc); 366 config_pending_decr(); 367 368 while (!sc->sc_dying) { 369 #ifdef USB_DEBUG 370 if (usb_noexplore < 2) 371 #endif 372 usb_discover(sc); 373 #ifdef USB_DEBUG 374 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 375 usb_noexplore ? 0 : hz * 60); 376 #else 377 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 378 hz * 60); 379 #endif 380 DPRINTFN(2,("usb_event_thread: woke up\n")); 381 } 382 sc->sc_event_thread = NULL; 383 384 /* In case parent is waiting for us to exit. */ 385 wakeup(sc); 386 387 DPRINTF(("usb_event_thread: exit\n")); 388 kthread_exit(0); 389 } 390 391 void 392 usb_task_thread(void *arg) 393 { 394 struct usb_task *task; 395 struct usb_taskq *taskq; 396 int s; 397 398 taskq = arg; 399 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 400 401 s = splusb(); 402 for (;;) { 403 task = TAILQ_FIRST(&taskq->tasks); 404 if (task == NULL) { 405 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 406 task = TAILQ_FIRST(&taskq->tasks); 407 } 408 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 409 if (task != NULL) { 410 TAILQ_REMOVE(&taskq->tasks, task, next); 411 task->queue = -1; 412 splx(s); 413 task->fun(task->arg); 414 s = splusb(); 415 } 416 } 417 } 418 419 int 420 usbctlprint(void *aux, const char *pnp) 421 { 422 /* only "usb"es can attach to host controllers */ 423 if (pnp) 424 aprint_normal("usb at %s", pnp); 425 426 return (UNCONF); 427 } 428 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 429 430 int 431 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 432 { 433 int unit = minor(dev); 434 struct usb_softc *sc; 435 436 if (unit == USB_DEV_MINOR) { 437 if (usb_dev_open) 438 return (EBUSY); 439 usb_dev_open = 1; 440 usb_async_proc = 0; 441 return (0); 442 } 443 444 sc = device_lookup_private(&usb_cd, unit); 445 446 if (sc->sc_dying) 447 return (EIO); 448 449 return (0); 450 } 451 452 int 453 usbread(dev_t dev, struct uio *uio, int flag) 454 { 455 struct usb_event *ue; 456 #ifdef COMPAT_30 457 struct usb_event_old *ueo = NULL; /* XXXGCC */ 458 #endif 459 int s, error, n, useold; 460 461 if (minor(dev) != USB_DEV_MINOR) 462 return (ENXIO); 463 464 useold = 0; 465 switch (uio->uio_resid) { 466 #ifdef COMPAT_30 467 case sizeof(struct usb_event_old): 468 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 469 M_WAITOK|M_ZERO); 470 useold = 1; 471 /* FALLTHRU */ 472 #endif 473 case sizeof(struct usb_event): 474 ue = usb_alloc_event(); 475 break; 476 default: 477 return (EINVAL); 478 } 479 480 error = 0; 481 s = splusb(); 482 for (;;) { 483 n = usb_get_next_event(ue); 484 if (n != 0) 485 break; 486 if (flag & IO_NDELAY) { 487 error = EWOULDBLOCK; 488 break; 489 } 490 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 491 if (error) 492 break; 493 } 494 splx(s); 495 if (!error) { 496 #ifdef COMPAT_30 497 if (useold) { /* copy fields to old struct */ 498 ueo->ue_type = ue->ue_type; 499 memcpy(&ueo->ue_time, &ue->ue_time, 500 sizeof(struct timespec)); 501 switch (ue->ue_type) { 502 case USB_EVENT_DEVICE_ATTACH: 503 case USB_EVENT_DEVICE_DETACH: 504 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 505 break; 506 507 case USB_EVENT_CTRLR_ATTACH: 508 case USB_EVENT_CTRLR_DETACH: 509 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 510 break; 511 512 case USB_EVENT_DRIVER_ATTACH: 513 case USB_EVENT_DRIVER_DETACH: 514 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 515 memcpy(ueo->u.ue_driver.ue_devname, 516 ue->u.ue_driver.ue_devname, 517 sizeof(ue->u.ue_driver.ue_devname)); 518 break; 519 default: 520 ; 521 } 522 523 error = uiomove((void *)ueo, sizeof *ueo, uio); 524 } else 525 #endif 526 error = uiomove((void *)ue, sizeof *ue, uio); 527 } 528 usb_free_event(ue); 529 #ifdef COMPAT_30 530 if (useold) 531 free(ueo, M_USBDEV); 532 #endif 533 534 return (error); 535 } 536 537 int 538 usbclose(dev_t dev, int flag, int mode, 539 struct lwp *l) 540 { 541 int unit = minor(dev); 542 543 if (unit == USB_DEV_MINOR) { 544 usb_async_proc = 0; 545 usb_dev_open = 0; 546 } 547 548 return (0); 549 } 550 551 int 552 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 553 { 554 struct usb_softc *sc; 555 int unit = minor(devt); 556 557 if (unit == USB_DEV_MINOR) { 558 switch (cmd) { 559 case FIONBIO: 560 /* All handled in the upper FS layer. */ 561 return (0); 562 563 case FIOASYNC: 564 if (*(int *)data) 565 usb_async_proc = l->l_proc; 566 else 567 usb_async_proc = 0; 568 return (0); 569 570 default: 571 return (EINVAL); 572 } 573 } 574 575 sc = device_lookup_private(&usb_cd, unit); 576 577 if (sc->sc_dying) 578 return (EIO); 579 580 switch (cmd) { 581 #ifdef USB_DEBUG 582 case USB_SETDEBUG: 583 if (!(flag & FWRITE)) 584 return (EBADF); 585 usbdebug = ((*(int *)data) & 0x000000ff); 586 #if defined(UHCI_DEBUG) && NUHCI > 0 587 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 588 #endif 589 #if defined(OHCI_DEBUG) && NOHCI > 0 590 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 591 #endif 592 break; 593 #endif /* USB_DEBUG */ 594 case USB_REQUEST: 595 { 596 struct usb_ctl_request *ur = (void *)data; 597 int len = UGETW(ur->ucr_request.wLength); 598 struct iovec iov; 599 struct uio uio; 600 void *ptr = 0; 601 int addr = ur->ucr_addr; 602 usbd_status err; 603 int error = 0; 604 605 if (!(flag & FWRITE)) 606 return (EBADF); 607 608 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 609 if (len < 0 || len > 32768) 610 return (EINVAL); 611 if (addr < 0 || addr >= USB_MAX_DEVICES || 612 sc->sc_bus->devices[addr] == 0) 613 return (EINVAL); 614 if (len != 0) { 615 iov.iov_base = (void *)ur->ucr_data; 616 iov.iov_len = len; 617 uio.uio_iov = &iov; 618 uio.uio_iovcnt = 1; 619 uio.uio_resid = len; 620 uio.uio_offset = 0; 621 uio.uio_rw = 622 ur->ucr_request.bmRequestType & UT_READ ? 623 UIO_READ : UIO_WRITE; 624 uio.uio_vmspace = l->l_proc->p_vmspace; 625 ptr = malloc(len, M_TEMP, M_WAITOK); 626 if (uio.uio_rw == UIO_WRITE) { 627 error = uiomove(ptr, len, &uio); 628 if (error) 629 goto ret; 630 } 631 } 632 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 633 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 634 USBD_DEFAULT_TIMEOUT); 635 if (err) { 636 error = EIO; 637 goto ret; 638 } 639 if (len > ur->ucr_actlen) 640 len = ur->ucr_actlen; 641 if (len != 0) { 642 if (uio.uio_rw == UIO_READ) { 643 error = uiomove(ptr, len, &uio); 644 if (error) 645 goto ret; 646 } 647 } 648 ret: 649 if (ptr) 650 free(ptr, M_TEMP); 651 return (error); 652 } 653 654 case USB_DEVICEINFO: 655 { 656 usbd_device_handle dev; 657 struct usb_device_info *di = (void *)data; 658 int addr = di->udi_addr; 659 660 if (addr < 1 || addr >= USB_MAX_DEVICES) 661 return EINVAL; 662 if ((dev = sc->sc_bus->devices[addr]) == NULL) 663 return ENXIO; 664 usbd_fill_deviceinfo(dev, di, 1); 665 break; 666 } 667 668 #ifdef COMPAT_30 669 case USB_DEVICEINFO_OLD: 670 { 671 usbd_device_handle dev; 672 struct usb_device_info_old *di = (void *)data; 673 int addr = di->udi_addr; 674 675 if (addr < 1 || addr >= USB_MAX_DEVICES) 676 return EINVAL; 677 if ((dev = sc->sc_bus->devices[addr]) == NULL) 678 return ENXIO; 679 usbd_fill_deviceinfo_old(dev, di, 1); 680 break; 681 } 682 #endif 683 684 case USB_DEVICESTATS: 685 *(struct usb_device_stats *)data = sc->sc_bus->stats; 686 break; 687 688 default: 689 return (EINVAL); 690 } 691 return (0); 692 } 693 694 int 695 usbpoll(dev_t dev, int events, struct lwp *l) 696 { 697 int revents, mask, s; 698 699 if (minor(dev) == USB_DEV_MINOR) { 700 revents = 0; 701 mask = POLLIN | POLLRDNORM; 702 703 s = splusb(); 704 if (events & mask && usb_nevents > 0) 705 revents |= events & mask; 706 if (revents == 0 && events & mask) 707 selrecord(l, &usb_selevent); 708 splx(s); 709 710 return (revents); 711 } else { 712 return (0); 713 } 714 } 715 716 static void 717 filt_usbrdetach(struct knote *kn) 718 { 719 int s; 720 721 s = splusb(); 722 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 723 splx(s); 724 } 725 726 static int 727 filt_usbread(struct knote *kn, long hint) 728 { 729 730 if (usb_nevents == 0) 731 return (0); 732 733 kn->kn_data = sizeof(struct usb_event); 734 return (1); 735 } 736 737 static const struct filterops usbread_filtops = 738 { 1, NULL, filt_usbrdetach, filt_usbread }; 739 740 int 741 usbkqfilter(dev_t dev, struct knote *kn) 742 { 743 struct klist *klist; 744 int s; 745 746 switch (kn->kn_filter) { 747 case EVFILT_READ: 748 if (minor(dev) != USB_DEV_MINOR) 749 return (1); 750 klist = &usb_selevent.sel_klist; 751 kn->kn_fop = &usbread_filtops; 752 break; 753 754 default: 755 return (EINVAL); 756 } 757 758 kn->kn_hook = NULL; 759 760 s = splusb(); 761 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 762 splx(s); 763 764 return (0); 765 } 766 767 /* Explore device tree from the root. */ 768 Static void 769 usb_discover(struct usb_softc *sc) 770 { 771 772 DPRINTFN(2,("usb_discover\n")); 773 #ifdef USB_DEBUG 774 if (usb_noexplore > 1) 775 return; 776 #endif 777 /* 778 * We need mutual exclusion while traversing the device tree, 779 * but this is guaranteed since this function is only called 780 * from the event thread for the controller. 781 */ 782 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 783 sc->sc_bus->needs_explore = 0; 784 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 785 } 786 } 787 788 void 789 usb_needs_explore(usbd_device_handle dev) 790 { 791 DPRINTFN(2,("usb_needs_explore\n")); 792 dev->bus->needs_explore = 1; 793 wakeup(&dev->bus->needs_explore); 794 } 795 796 void 797 usb_needs_reattach(usbd_device_handle dev) 798 { 799 DPRINTFN(2,("usb_needs_reattach\n")); 800 dev->powersrc->reattach = 1; 801 dev->bus->needs_explore = 1; 802 wakeup(&dev->bus->needs_explore); 803 } 804 805 /* Called at splusb() */ 806 int 807 usb_get_next_event(struct usb_event *ue) 808 { 809 struct usb_event_q *ueq; 810 811 if (usb_nevents <= 0) 812 return (0); 813 ueq = SIMPLEQ_FIRST(&usb_events); 814 #ifdef DIAGNOSTIC 815 if (ueq == NULL) { 816 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 817 usb_nevents = 0; 818 return (0); 819 } 820 #endif 821 if (ue) 822 *ue = ueq->ue; 823 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 824 usb_free_event((struct usb_event *)(void *)ueq); 825 usb_nevents--; 826 return (1); 827 } 828 829 void 830 usbd_add_dev_event(int type, usbd_device_handle udev) 831 { 832 struct usb_event *ue = usb_alloc_event(); 833 834 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 835 usb_add_event(type, ue); 836 } 837 838 void 839 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 840 { 841 struct usb_event *ue = usb_alloc_event(); 842 843 ue->u.ue_driver.ue_cookie = udev->cookie; 844 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 845 sizeof ue->u.ue_driver.ue_devname); 846 usb_add_event(type, ue); 847 } 848 849 Static struct usb_event * 850 usb_alloc_event(void) 851 { 852 /* Yes, this is right; we allocate enough so that we can use it later */ 853 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 854 } 855 856 Static void 857 usb_free_event(struct usb_event *uep) 858 { 859 free(uep, M_USBDEV); 860 } 861 862 Static void 863 usb_add_event(int type, struct usb_event *uep) 864 { 865 struct usb_event_q *ueq; 866 struct timeval thetime; 867 int s; 868 869 microtime(&thetime); 870 /* Don't want to wait here inside splusb() */ 871 ueq = (struct usb_event_q *)(void *)uep; 872 ueq->ue = *uep; 873 ueq->ue.ue_type = type; 874 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 875 876 s = splusb(); 877 if (++usb_nevents >= USB_MAX_EVENTS) { 878 /* Too many queued events, drop an old one. */ 879 DPRINTFN(-1,("usb: event dropped\n")); 880 (void)usb_get_next_event(0); 881 } 882 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 883 wakeup(&usb_events); 884 selnotify(&usb_selevent, 0, 0); 885 if (usb_async_proc != NULL) { 886 mutex_enter(&proclist_mutex); 887 psignal(usb_async_proc, SIGIO); 888 mutex_exit(&proclist_mutex); 889 } 890 splx(s); 891 } 892 893 void 894 usb_schedsoftintr(usbd_bus_handle bus) 895 { 896 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 897 #ifdef USB_USE_SOFTINTR 898 if (bus->use_polling) { 899 bus->methods->soft_intr(bus); 900 } else { 901 softint_schedule(bus->soft); 902 } 903 #else 904 bus->methods->soft_intr(bus); 905 #endif /* USB_USE_SOFTINTR */ 906 } 907 908 int 909 usb_activate(device_t self, enum devact act) 910 { 911 struct usb_softc *sc = device_private(self); 912 usbd_device_handle dev = sc->sc_port.device; 913 int i, rv = 0; 914 915 switch (act) { 916 case DVACT_ACTIVATE: 917 return (EOPNOTSUPP); 918 919 case DVACT_DEACTIVATE: 920 sc->sc_dying = 1; 921 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 922 for (i = 0; dev->subdevs[i]; i++) 923 rv |= config_deactivate(dev->subdevs[i]); 924 } 925 break; 926 } 927 return (rv); 928 } 929 930 void 931 usb_childdet(device_t self, device_t child) 932 { 933 int i, last = -1; 934 struct usb_softc *sc = device_private(self); 935 struct usbd_device *dev; 936 937 if ((dev = sc->sc_port.device) == NULL || dev->subdevs == NULL) 938 return; 939 940 for (i = 0; dev->subdevs[i] != NULL; i++) 941 last = i; 942 943 for (i = 0; dev->subdevs[i] != NULL; i++) { 944 if (dev->subdevs[i] == child) { 945 dev->subdevs[i] = dev->subdevs[last]; 946 dev->subdevs[last] = NULL; 947 } 948 } 949 } 950 951 int 952 usb_detach(device_t self, int flags) 953 { 954 struct usb_softc *sc = device_private(self); 955 struct usb_event *ue; 956 957 DPRINTF(("usb_detach: start\n")); 958 959 pmf_device_deregister(self); 960 /* Kill off event thread. */ 961 while (sc->sc_event_thread != NULL) { 962 wakeup(&sc->sc_bus->needs_explore); 963 tsleep(sc, PWAIT, "usbdet", hz * 60); 964 } 965 DPRINTF(("usb_detach: event thread dead\n")); 966 967 /* Make all devices disconnect. */ 968 if (sc->sc_port.device != NULL) 969 usb_disconnect_port(&sc->sc_port, self); 970 971 #ifdef USB_USE_SOFTINTR 972 if (sc->sc_bus->soft != NULL) { 973 softint_disestablish(sc->sc_bus->soft); 974 sc->sc_bus->soft = NULL; 975 } 976 #endif 977 978 ue = usb_alloc_event(); 979 ue->u.ue_ctrlr.ue_bus = device_unit(self); 980 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 981 982 return (0); 983 } 984 985 #ifdef COMPAT_30 986 Static void 987 usb_copy_old_devinfo(struct usb_device_info_old *uo, 988 const struct usb_device_info *ue) 989 { 990 const unsigned char *p; 991 unsigned char *q; 992 int i, n; 993 994 uo->udi_bus = ue->udi_bus; 995 uo->udi_addr = ue->udi_addr; 996 uo->udi_cookie = ue->udi_cookie; 997 for (i = 0, p = (const unsigned char *)ue->udi_product, 998 q = (unsigned char *)uo->udi_product; 999 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1000 if (*p < 0x80) 1001 q[i++] = *p; 1002 else { 1003 q[i++] = '?'; 1004 if ((*p & 0xe0) == 0xe0) 1005 p++; 1006 p++; 1007 } 1008 } 1009 q[i] = 0; 1010 1011 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1012 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1013 if (* p < 0x80) 1014 q[i++] = *p; 1015 else { 1016 q[i++] = '?'; 1017 p++; 1018 if ((*p & 0xe0) == 0xe0) 1019 p++; 1020 } 1021 } 1022 q[i] = 0; 1023 1024 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1025 1026 uo->udi_productNo = ue->udi_productNo; 1027 uo->udi_vendorNo = ue->udi_vendorNo; 1028 uo->udi_releaseNo = ue->udi_releaseNo; 1029 uo->udi_class = ue->udi_class; 1030 uo->udi_subclass = ue->udi_subclass; 1031 uo->udi_protocol = ue->udi_protocol; 1032 uo->udi_config = ue->udi_config; 1033 uo->udi_speed = ue->udi_speed; 1034 uo->udi_power = ue->udi_power; 1035 uo->udi_nports = ue->udi_nports; 1036 1037 for (n=0; n<USB_MAX_DEVNAMES; n++) 1038 memcpy(uo->udi_devnames[n], 1039 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1040 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1041 } 1042 #endif 1043
Indexes created Tue Sep 23 14:10:03 GMT 2025