usb.c revision 1.106.6.4
1 /* $NetBSD: usb.c,v 1.106.6.4 2008/06/02 13:23:55 mjf 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 1.106.6.4 2008/06/02 13:23:55 mjf Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 44 #include "ohci.h" 45 #include "uhci.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/malloc.h> 51 #include <sys/device.h> 52 #include <sys/kthread.h> 53 #include <sys/proc.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/poll.h> 57 #include <sys/select.h> 58 #include <sys/vnode.h> 59 #include <sys/signalvar.h> 60 #include <sys/intr.h> 61 62 #include <dev/usb/usb.h> 63 #include <dev/usb/usbdi.h> 64 #include <dev/usb/usbdi_util.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) logprintf x 75 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 76 int usbdebug = 0; 77 #if defined(UHCI_DEBUG) && NUHCI > 0 78 extern int uhcidebug; 79 #endif 80 #if defined(OHCI_DEBUG) && NOHCI > 0 81 extern int ohcidebug; 82 #endif 83 /* 84 * 0 - do usual exploration 85 * 1 - do not use timeout exploration 86 * >1 - do no exploration 87 */ 88 int usb_noexplore = 0; 89 #else 90 #define DPRINTF(x) 91 #define DPRINTFN(n,x) 92 #endif 93 94 struct usb_softc { 95 #if 0 96 USBBASEDEVICE sc_dev; /* base device */ 97 #endif 98 usbd_bus_handle sc_bus; /* USB controller */ 99 struct usbd_port sc_port; /* dummy port for root hub */ 100 101 struct lwp *sc_event_thread; 102 103 char sc_dying; 104 }; 105 106 struct usb_taskq { 107 TAILQ_HEAD(, usb_task) tasks; 108 struct lwp *task_thread_lwp; 109 const char *name; 110 int taskcreated; /* task thread exists. */ 111 }; 112 113 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 114 115 dev_type_open(usbopen); 116 dev_type_close(usbclose); 117 dev_type_read(usbread); 118 dev_type_ioctl(usbioctl); 119 dev_type_poll(usbpoll); 120 dev_type_kqfilter(usbkqfilter); 121 122 const struct cdevsw usb_cdevsw = { 123 usbopen, usbclose, usbread, nowrite, usbioctl, 124 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 125 }; 126 127 Static void usb_discover(struct usb_softc *); 128 Static void usb_create_event_thread(device_t); 129 Static void usb_event_thread(void *); 130 Static void usb_task_thread(void *); 131 132 #define USB_MAX_EVENTS 100 133 struct usb_event_q { 134 struct usb_event ue; 135 SIMPLEQ_ENTRY(usb_event_q) next; 136 }; 137 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 138 SIMPLEQ_HEAD_INITIALIZER(usb_events); 139 Static int usb_nevents = 0; 140 Static struct selinfo usb_selevent; 141 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 142 Static void *usb_async_sih; 143 Static int usb_dev_open = 0; 144 Static struct usb_event *usb_alloc_event(void); 145 Static void usb_free_event(struct usb_event *); 146 Static void usb_add_event(int, struct usb_event *); 147 Static int usb_get_next_event(struct usb_event *); 148 Static void usb_async_intr(void *); 149 150 #ifdef COMPAT_30 151 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 152 #endif 153 154 Static const char *usbrev_str[] = USBREV_STR; 155 156 static int usb_match(device_t, struct cfdata *, void *); 157 static void usb_attach(device_t, device_t, void *); 158 static int usb_detach(device_t, int); 159 static int usb_activate(device_t, enum devact); 160 static void usb_childdet(device_t, device_t); 161 static void usb_doattach(device_t); 162 163 extern struct cfdriver usb_cd; 164 165 CFATTACH_DECL2_NEW(usb, sizeof(struct usb_softc), 166 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet); 167 168 USB_MATCH(usb) 169 { 170 DPRINTF(("usbd_match\n")); 171 return (UMATCH_GENERIC); 172 } 173 174 USB_ATTACH(usb) 175 { 176 struct usb_softc *sc = device_private(self); 177 int usbrev, maj; 178 179 sc->sc_bus = aux; 180 usbrev = sc->sc_bus->usbrev; 181 182 aprint_naive("\n"); 183 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 184 switch (usbrev) { 185 case USBREV_1_0: 186 case USBREV_1_1: 187 case USBREV_2_0: 188 break; 189 default: 190 aprint_error(", not supported\n"); 191 sc->sc_dying = 1; 192 USB_ATTACH_ERROR_RETURN; 193 } 194 aprint_normal("\n"); 195 196 config_interrupts(self, usb_doattach); 197 198 maj = cdevsw_lookup_major(&usb_cdevsw); 199 device_register_name(makedev(maj, device_unit(self)), self, true, 200 DEV_OTHER, device_xname(self)); 201 } 202 203 static void 204 usb_doattach(device_t self) 205 { 206 static bool usb_selevent_init; /* XXX */ 207 struct usb_softc *sc = device_private(self); 208 usbd_device_handle dev; 209 usbd_status err; 210 int speed; 211 struct usb_event *ue; 212 213 if (!usb_selevent_init) { 214 selinit(&usb_selevent); 215 usb_selevent_init = true; 216 } 217 DPRINTF(("usbd_doattach\n")); 218 219 sc->sc_bus->usbctl = self; 220 sc->sc_port.power = USB_MAX_POWER; 221 222 switch (sc->sc_bus->usbrev) { 223 case USBREV_1_0: 224 case USBREV_1_1: 225 speed = USB_SPEED_FULL; 226 break; 227 case USBREV_2_0: 228 speed = USB_SPEED_HIGH; 229 break; 230 default: 231 panic("usb_doattach"); 232 } 233 234 ue = usb_alloc_event(); 235 ue->u.ue_ctrlr.ue_bus = device_unit(self); 236 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 237 238 #ifdef USB_USE_SOFTINTR 239 /* XXX we should have our own level */ 240 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 241 sc->sc_bus->methods->soft_intr, sc->sc_bus); 242 if (sc->sc_bus->soft == NULL) { 243 aprint_error("%s: can't register softintr\n", 244 device_xname(self)); 245 sc->sc_dying = 1; 246 USB_ATTACH_ERROR_RETURN; 247 } 248 #endif 249 250 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 251 &sc->sc_port); 252 if (!err) { 253 dev = sc->sc_port.device; 254 if (dev->hub == NULL) { 255 sc->sc_dying = 1; 256 aprint_error("%s: root device is not a hub\n", 257 device_xname(self)); 258 USB_ATTACH_ERROR_RETURN; 259 } 260 sc->sc_bus->root_hub = dev; 261 #if 1 262 /* 263 * Turning this code off will delay attachment of USB devices 264 * until the USB event thread is running, which means that 265 * the keyboard will not work until after cold boot. 266 */ 267 if (cold && (device_cfdata(self)->cf_flags & 1)) 268 dev->hub->explore(sc->sc_bus->root_hub); 269 #endif 270 } else { 271 aprint_error("%s: root hub problem, error=%d\n", 272 device_xname(self), err); 273 sc->sc_dying = 1; 274 } 275 276 config_pending_incr(); 277 usb_create_event_thread(self); 278 279 if (!pmf_device_register(self, NULL, NULL)) 280 aprint_error_dev(self, "couldn't establish power handler\n"); 281 282 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 283 usb_async_intr, NULL); 284 285 USB_ATTACH_SUCCESS_RETURN; 286 } 287 288 static const char *taskq_names[] = USB_TASKQ_NAMES; 289 290 void 291 usb_create_event_thread(device_t self) 292 { 293 struct usb_softc *sc = device_private(self); 294 struct usb_taskq *taskq; 295 int i; 296 297 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 298 &sc->sc_event_thread, "%s", device_xname(self))) { 299 printf("%s: unable to create event thread for\n", 300 device_xname(self)); 301 panic("usb_create_event_thread"); 302 } 303 for (i = 0; i < USB_NUM_TASKQS; i++) { 304 taskq = &usb_taskq[i]; 305 306 if (taskq->taskcreated) 307 continue; 308 309 TAILQ_INIT(&taskq->tasks); 310 taskq->taskcreated = 1; 311 taskq->name = taskq_names[i]; 312 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 313 taskq, &taskq->task_thread_lwp, taskq->name)) { 314 printf("unable to create task thread: %s\n", taskq->name); 315 panic("usb_create_event_thread task"); 316 } 317 } 318 } 319 320 /* 321 * Add a task to be performed by the task thread. This function can be 322 * called from any context and the task will be executed in a process 323 * context ASAP. 324 */ 325 void 326 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 327 { 328 struct usb_taskq *taskq; 329 int s; 330 331 taskq = &usb_taskq[queue]; 332 s = splusb(); 333 if (task->queue == -1) { 334 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 335 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 336 task->queue = queue; 337 } else { 338 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 339 } 340 wakeup(&taskq->tasks); 341 splx(s); 342 } 343 344 void 345 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 346 { 347 struct usb_taskq *taskq; 348 int s; 349 350 taskq = &usb_taskq[task->queue]; 351 s = splusb(); 352 if (task->queue != -1) { 353 TAILQ_REMOVE(&taskq->tasks, task, next); 354 task->queue = -1; 355 } 356 splx(s); 357 } 358 359 void 360 usb_event_thread(void *arg) 361 { 362 struct usb_softc *sc = arg; 363 364 DPRINTF(("usb_event_thread: start\n")); 365 366 /* 367 * In case this controller is a companion controller to an 368 * EHCI controller we need to wait until the EHCI controller 369 * has grabbed the port. 370 * XXX It would be nicer to do this with a tsleep(), but I don't 371 * know how to synchronize the creation of the threads so it 372 * will work. 373 */ 374 usb_delay_ms(sc->sc_bus, 500); 375 376 /* Make sure first discover does something. */ 377 sc->sc_bus->needs_explore = 1; 378 usb_discover(sc); 379 config_pending_decr(); 380 381 while (!sc->sc_dying) { 382 #ifdef USB_DEBUG 383 if (usb_noexplore < 2) 384 #endif 385 usb_discover(sc); 386 #ifdef USB_DEBUG 387 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 388 usb_noexplore ? 0 : hz * 60); 389 #else 390 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 391 hz * 60); 392 #endif 393 DPRINTFN(2,("usb_event_thread: woke up\n")); 394 } 395 sc->sc_event_thread = NULL; 396 397 /* In case parent is waiting for us to exit. */ 398 wakeup(sc); 399 400 DPRINTF(("usb_event_thread: exit\n")); 401 kthread_exit(0); 402 } 403 404 void 405 usb_task_thread(void *arg) 406 { 407 struct usb_task *task; 408 struct usb_taskq *taskq; 409 int s; 410 411 taskq = arg; 412 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 413 414 s = splusb(); 415 for (;;) { 416 task = TAILQ_FIRST(&taskq->tasks); 417 if (task == NULL) { 418 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 419 task = TAILQ_FIRST(&taskq->tasks); 420 } 421 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 422 if (task != NULL) { 423 TAILQ_REMOVE(&taskq->tasks, task, next); 424 task->queue = -1; 425 splx(s); 426 task->fun(task->arg); 427 s = splusb(); 428 } 429 } 430 } 431 432 int 433 usbctlprint(void *aux, const char *pnp) 434 { 435 /* only "usb"es can attach to host controllers */ 436 if (pnp) 437 aprint_normal("usb at %s", pnp); 438 439 return (UNCONF); 440 } 441 442 int 443 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 444 { 445 int unit = minor(dev); 446 struct usb_softc *sc; 447 448 if (unit == USB_DEV_MINOR) { 449 if (usb_dev_open) 450 return (EBUSY); 451 usb_dev_open = 1; 452 mutex_enter(proc_lock); 453 usb_async_proc = 0; 454 mutex_exit(proc_lock); 455 return (0); 456 } 457 458 sc = device_lookup_private(&usb_cd, unit); 459 if (!sc) 460 return (ENXIO); 461 462 if (sc->sc_dying) 463 return (EIO); 464 465 return (0); 466 } 467 468 int 469 usbread(dev_t dev, struct uio *uio, int flag) 470 { 471 struct usb_event *ue; 472 #ifdef COMPAT_30 473 struct usb_event_old *ueo = NULL; /* XXXGCC */ 474 #endif 475 int s, error, n, useold; 476 477 if (minor(dev) != USB_DEV_MINOR) 478 return (ENXIO); 479 480 useold = 0; 481 switch (uio->uio_resid) { 482 #ifdef COMPAT_30 483 case sizeof(struct usb_event_old): 484 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 485 M_WAITOK|M_ZERO); 486 useold = 1; 487 /* FALLTHRU */ 488 #endif 489 case sizeof(struct usb_event): 490 ue = usb_alloc_event(); 491 break; 492 default: 493 return (EINVAL); 494 } 495 496 error = 0; 497 s = splusb(); 498 for (;;) { 499 n = usb_get_next_event(ue); 500 if (n != 0) 501 break; 502 if (flag & IO_NDELAY) { 503 error = EWOULDBLOCK; 504 break; 505 } 506 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 507 if (error) 508 break; 509 } 510 splx(s); 511 if (!error) { 512 #ifdef COMPAT_30 513 if (useold) { /* copy fields to old struct */ 514 ueo->ue_type = ue->ue_type; 515 memcpy(&ueo->ue_time, &ue->ue_time, 516 sizeof(struct timespec)); 517 switch (ue->ue_type) { 518 case USB_EVENT_DEVICE_ATTACH: 519 case USB_EVENT_DEVICE_DETACH: 520 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 521 break; 522 523 case USB_EVENT_CTRLR_ATTACH: 524 case USB_EVENT_CTRLR_DETACH: 525 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 526 break; 527 528 case USB_EVENT_DRIVER_ATTACH: 529 case USB_EVENT_DRIVER_DETACH: 530 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 531 memcpy(ueo->u.ue_driver.ue_devname, 532 ue->u.ue_driver.ue_devname, 533 sizeof(ue->u.ue_driver.ue_devname)); 534 break; 535 default: 536 ; 537 } 538 539 error = uiomove((void *)ueo, sizeof *ueo, uio); 540 } else 541 #endif 542 error = uiomove((void *)ue, sizeof *ue, uio); 543 } 544 usb_free_event(ue); 545 #ifdef COMPAT_30 546 if (useold) 547 free(ueo, M_USBDEV); 548 #endif 549 550 return (error); 551 } 552 553 int 554 usbclose(dev_t dev, int flag, int mode, 555 struct lwp *l) 556 { 557 int unit = minor(dev); 558 559 if (unit == USB_DEV_MINOR) { 560 mutex_enter(proc_lock); 561 usb_async_proc = 0; 562 mutex_exit(proc_lock); 563 usb_dev_open = 0; 564 } 565 566 return (0); 567 } 568 569 int 570 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 571 { 572 struct usb_softc *sc; 573 int unit = minor(devt); 574 575 if (unit == USB_DEV_MINOR) { 576 switch (cmd) { 577 case FIONBIO: 578 /* All handled in the upper FS layer. */ 579 return (0); 580 581 case FIOASYNC: 582 mutex_enter(proc_lock); 583 if (*(int *)data) 584 usb_async_proc = l->l_proc; 585 else 586 usb_async_proc = 0; 587 mutex_exit(proc_lock); 588 return (0); 589 590 default: 591 return (EINVAL); 592 } 593 } 594 595 sc = device_lookup_private(&usb_cd, unit); 596 597 if (sc->sc_dying) 598 return (EIO); 599 600 switch (cmd) { 601 #ifdef USB_DEBUG 602 case USB_SETDEBUG: 603 if (!(flag & FWRITE)) 604 return (EBADF); 605 usbdebug = ((*(int *)data) & 0x000000ff); 606 #if defined(UHCI_DEBUG) && NUHCI > 0 607 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 608 #endif 609 #if defined(OHCI_DEBUG) && NOHCI > 0 610 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 611 #endif 612 break; 613 #endif /* USB_DEBUG */ 614 case USB_REQUEST: 615 { 616 struct usb_ctl_request *ur = (void *)data; 617 int len = UGETW(ur->ucr_request.wLength); 618 struct iovec iov; 619 struct uio uio; 620 void *ptr = 0; 621 int addr = ur->ucr_addr; 622 usbd_status err; 623 int error = 0; 624 625 if (!(flag & FWRITE)) 626 return (EBADF); 627 628 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 629 if (len < 0 || len > 32768) 630 return (EINVAL); 631 if (addr < 0 || addr >= USB_MAX_DEVICES || 632 sc->sc_bus->devices[addr] == 0) 633 return (EINVAL); 634 if (len != 0) { 635 iov.iov_base = (void *)ur->ucr_data; 636 iov.iov_len = len; 637 uio.uio_iov = &iov; 638 uio.uio_iovcnt = 1; 639 uio.uio_resid = len; 640 uio.uio_offset = 0; 641 uio.uio_rw = 642 ur->ucr_request.bmRequestType & UT_READ ? 643 UIO_READ : UIO_WRITE; 644 uio.uio_vmspace = l->l_proc->p_vmspace; 645 ptr = malloc(len, M_TEMP, M_WAITOK); 646 if (uio.uio_rw == UIO_WRITE) { 647 error = uiomove(ptr, len, &uio); 648 if (error) 649 goto ret; 650 } 651 } 652 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 653 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 654 USBD_DEFAULT_TIMEOUT); 655 if (err) { 656 error = EIO; 657 goto ret; 658 } 659 if (len > ur->ucr_actlen) 660 len = ur->ucr_actlen; 661 if (len != 0) { 662 if (uio.uio_rw == UIO_READ) { 663 error = uiomove(ptr, len, &uio); 664 if (error) 665 goto ret; 666 } 667 } 668 ret: 669 if (ptr) 670 free(ptr, M_TEMP); 671 return (error); 672 } 673 674 case USB_DEVICEINFO: 675 { 676 usbd_device_handle dev; 677 struct usb_device_info *di = (void *)data; 678 int addr = di->udi_addr; 679 680 if (addr < 1 || addr >= USB_MAX_DEVICES) 681 return EINVAL; 682 if ((dev = sc->sc_bus->devices[addr]) == NULL) 683 return ENXIO; 684 usbd_fill_deviceinfo(dev, di, 1); 685 break; 686 } 687 688 #ifdef COMPAT_30 689 case USB_DEVICEINFO_OLD: 690 { 691 usbd_device_handle dev; 692 struct usb_device_info_old *di = (void *)data; 693 int addr = di->udi_addr; 694 695 if (addr < 1 || addr >= USB_MAX_DEVICES) 696 return EINVAL; 697 if ((dev = sc->sc_bus->devices[addr]) == NULL) 698 return ENXIO; 699 usbd_fill_deviceinfo_old(dev, di, 1); 700 break; 701 } 702 #endif 703 704 case USB_DEVICESTATS: 705 *(struct usb_device_stats *)data = sc->sc_bus->stats; 706 break; 707 708 default: 709 return (EINVAL); 710 } 711 return (0); 712 } 713 714 int 715 usbpoll(dev_t dev, int events, struct lwp *l) 716 { 717 int revents, mask, s; 718 719 if (minor(dev) == USB_DEV_MINOR) { 720 revents = 0; 721 mask = POLLIN | POLLRDNORM; 722 723 s = splusb(); 724 if (events & mask && usb_nevents > 0) 725 revents |= events & mask; 726 if (revents == 0 && events & mask) 727 selrecord(l, &usb_selevent); 728 splx(s); 729 730 return (revents); 731 } else { 732 return (0); 733 } 734 } 735 736 static void 737 filt_usbrdetach(struct knote *kn) 738 { 739 int s; 740 741 s = splusb(); 742 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 743 splx(s); 744 } 745 746 static int 747 filt_usbread(struct knote *kn, long hint) 748 { 749 750 if (usb_nevents == 0) 751 return (0); 752 753 kn->kn_data = sizeof(struct usb_event); 754 return (1); 755 } 756 757 static const struct filterops usbread_filtops = 758 { 1, NULL, filt_usbrdetach, filt_usbread }; 759 760 int 761 usbkqfilter(dev_t dev, struct knote *kn) 762 { 763 struct klist *klist; 764 int s; 765 766 switch (kn->kn_filter) { 767 case EVFILT_READ: 768 if (minor(dev) != USB_DEV_MINOR) 769 return (1); 770 klist = &usb_selevent.sel_klist; 771 kn->kn_fop = &usbread_filtops; 772 break; 773 774 default: 775 return (EINVAL); 776 } 777 778 kn->kn_hook = NULL; 779 780 s = splusb(); 781 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 782 splx(s); 783 784 return (0); 785 } 786 787 /* Explore device tree from the root. */ 788 Static void 789 usb_discover(struct usb_softc *sc) 790 { 791 792 DPRINTFN(2,("usb_discover\n")); 793 #ifdef USB_DEBUG 794 if (usb_noexplore > 1) 795 return; 796 #endif 797 /* 798 * We need mutual exclusion while traversing the device tree, 799 * but this is guaranteed since this function is only called 800 * from the event thread for the controller. 801 */ 802 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 803 sc->sc_bus->needs_explore = 0; 804 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 805 } 806 } 807 808 void 809 usb_needs_explore(usbd_device_handle dev) 810 { 811 DPRINTFN(2,("usb_needs_explore\n")); 812 dev->bus->needs_explore = 1; 813 wakeup(&dev->bus->needs_explore); 814 } 815 816 void 817 usb_needs_reattach(usbd_device_handle dev) 818 { 819 DPRINTFN(2,("usb_needs_reattach\n")); 820 dev->powersrc->reattach = 1; 821 dev->bus->needs_explore = 1; 822 wakeup(&dev->bus->needs_explore); 823 } 824 825 /* Called at splusb() */ 826 int 827 usb_get_next_event(struct usb_event *ue) 828 { 829 struct usb_event_q *ueq; 830 831 if (usb_nevents <= 0) 832 return (0); 833 ueq = SIMPLEQ_FIRST(&usb_events); 834 #ifdef DIAGNOSTIC 835 if (ueq == NULL) { 836 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 837 usb_nevents = 0; 838 return (0); 839 } 840 #endif 841 if (ue) 842 *ue = ueq->ue; 843 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 844 usb_free_event((struct usb_event *)(void *)ueq); 845 usb_nevents--; 846 return (1); 847 } 848 849 void 850 usbd_add_dev_event(int type, usbd_device_handle udev) 851 { 852 struct usb_event *ue = usb_alloc_event(); 853 854 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 855 usb_add_event(type, ue); 856 } 857 858 void 859 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 860 { 861 struct usb_event *ue = usb_alloc_event(); 862 863 ue->u.ue_driver.ue_cookie = udev->cookie; 864 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 865 sizeof ue->u.ue_driver.ue_devname); 866 usb_add_event(type, ue); 867 } 868 869 Static struct usb_event * 870 usb_alloc_event(void) 871 { 872 /* Yes, this is right; we allocate enough so that we can use it later */ 873 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 874 } 875 876 Static void 877 usb_free_event(struct usb_event *uep) 878 { 879 free(uep, M_USBDEV); 880 } 881 882 Static void 883 usb_add_event(int type, struct usb_event *uep) 884 { 885 struct usb_event_q *ueq; 886 struct timeval thetime; 887 int s; 888 889 microtime(&thetime); 890 /* Don't want to wait here inside splusb() */ 891 ueq = (struct usb_event_q *)(void *)uep; 892 ueq->ue = *uep; 893 ueq->ue.ue_type = type; 894 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 895 896 s = splusb(); 897 if (++usb_nevents >= USB_MAX_EVENTS) { 898 /* Too many queued events, drop an old one. */ 899 DPRINTFN(-1,("usb: event dropped\n")); 900 (void)usb_get_next_event(0); 901 } 902 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 903 wakeup(&usb_events); 904 selnotify(&usb_selevent, 0, 0); 905 if (usb_async_proc != NULL) { 906 softint_schedule(usb_async_sih); 907 } 908 splx(s); 909 } 910 911 Static void 912 usb_async_intr(void *cookie) 913 { 914 proc_t *proc; 915 916 mutex_enter(proc_lock); 917 if ((proc = usb_async_proc) != NULL) 918 psignal(proc, SIGIO); 919 mutex_exit(proc_lock); 920 } 921 922 void 923 usb_schedsoftintr(usbd_bus_handle bus) 924 { 925 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 926 #ifdef USB_USE_SOFTINTR 927 if (bus->use_polling) { 928 bus->methods->soft_intr(bus); 929 } else { 930 softint_schedule(bus->soft); 931 } 932 #else 933 bus->methods->soft_intr(bus); 934 #endif /* USB_USE_SOFTINTR */ 935 } 936 937 int 938 usb_activate(device_t self, enum devact act) 939 { 940 struct usb_softc *sc = device_private(self); 941 usbd_device_handle dev = sc->sc_port.device; 942 int i, rv = 0; 943 944 switch (act) { 945 case DVACT_ACTIVATE: 946 return (EOPNOTSUPP); 947 948 case DVACT_DEACTIVATE: 949 sc->sc_dying = 1; 950 if (dev != NULL && dev->cdesc != NULL && dev->subdevlen > 0) { 951 for (i = 0; i < dev->subdevlen; i++) { 952 if (!dev->subdevs[i]) 953 continue; 954 rv |= config_deactivate(dev->subdevs[i]); 955 } 956 } 957 break; 958 } 959 return (rv); 960 } 961 962 void 963 usb_childdet(device_t self, device_t child) 964 { 965 int i; 966 struct usb_softc *sc = device_private(self); 967 struct usbd_device *dev; 968 969 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 970 return; 971 972 for (i = 0; i < dev->subdevlen; i++) 973 if (dev->subdevs[i] == child) 974 dev->subdevs[i] = NULL; 975 } 976 977 int 978 usb_detach(device_t self, int flags) 979 { 980 struct usb_softc *sc = device_private(self); 981 struct usb_event *ue; 982 983 DPRINTF(("usb_detach: start\n")); 984 985 device_deregister_all(self); 986 pmf_device_deregister(self); 987 /* Kill off event thread. */ 988 while (sc->sc_event_thread != NULL) { 989 wakeup(&sc->sc_bus->needs_explore); 990 tsleep(sc, PWAIT, "usbdet", hz * 60); 991 } 992 DPRINTF(("usb_detach: event thread dead\n")); 993 994 /* Make all devices disconnect. */ 995 if (sc->sc_port.device != NULL) 996 usb_disconnect_port(&sc->sc_port, self); 997 998 #ifdef USB_USE_SOFTINTR 999 if (sc->sc_bus->soft != NULL) { 1000 softint_disestablish(sc->sc_bus->soft); 1001 sc->sc_bus->soft = NULL; 1002 } 1003 #endif 1004 1005 ue = usb_alloc_event(); 1006 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1007 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1008 1009 return (0); 1010 } 1011 1012 #ifdef COMPAT_30 1013 Static void 1014 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1015 const struct usb_device_info *ue) 1016 { 1017 const unsigned char *p; 1018 unsigned char *q; 1019 int i, n; 1020 1021 uo->udi_bus = ue->udi_bus; 1022 uo->udi_addr = ue->udi_addr; 1023 uo->udi_cookie = ue->udi_cookie; 1024 for (i = 0, p = (const unsigned char *)ue->udi_product, 1025 q = (unsigned char *)uo->udi_product; 1026 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1027 if (*p < 0x80) 1028 q[i++] = *p; 1029 else { 1030 q[i++] = '?'; 1031 if ((*p & 0xe0) == 0xe0) 1032 p++; 1033 p++; 1034 } 1035 } 1036 q[i] = 0; 1037 1038 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1039 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1040 if (* p < 0x80) 1041 q[i++] = *p; 1042 else { 1043 q[i++] = '?'; 1044 p++; 1045 if ((*p & 0xe0) == 0xe0) 1046 p++; 1047 } 1048 } 1049 q[i] = 0; 1050 1051 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1052 1053 uo->udi_productNo = ue->udi_productNo; 1054 uo->udi_vendorNo = ue->udi_vendorNo; 1055 uo->udi_releaseNo = ue->udi_releaseNo; 1056 uo->udi_class = ue->udi_class; 1057 uo->udi_subclass = ue->udi_subclass; 1058 uo->udi_protocol = ue->udi_protocol; 1059 uo->udi_config = ue->udi_config; 1060 uo->udi_speed = ue->udi_speed; 1061 uo->udi_power = ue->udi_power; 1062 uo->udi_nports = ue->udi_nports; 1063 1064 for (n=0; n<USB_MAX_DEVNAMES; n++) 1065 memcpy(uo->udi_devnames[n], 1066 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1067 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1068 } 1069 #endif 1070
Indexes created Mon Sep 29 21:09:56 GMT 2025