usb.c revision 1.113.2.1
1 /* $NetBSD: usb.c,v 1.113.2.1 2008/06/23 04:31:37 wrstuden 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 1.113.2.1 2008/06/23 04:31:37 wrstuden 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; 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 } 198 199 static void 200 usb_doattach(device_t self) 201 { 202 static bool usb_selevent_init; /* XXX */ 203 struct usb_softc *sc = device_private(self); 204 usbd_device_handle dev; 205 usbd_status err; 206 int speed; 207 struct usb_event *ue; 208 209 if (!usb_selevent_init) { 210 selinit(&usb_selevent); 211 usb_selevent_init = true; 212 } 213 DPRINTF(("usbd_doattach\n")); 214 215 sc->sc_bus->usbctl = self; 216 sc->sc_port.power = USB_MAX_POWER; 217 218 switch (sc->sc_bus->usbrev) { 219 case USBREV_1_0: 220 case USBREV_1_1: 221 speed = USB_SPEED_FULL; 222 break; 223 case USBREV_2_0: 224 speed = USB_SPEED_HIGH; 225 break; 226 default: 227 panic("usb_doattach"); 228 } 229 230 ue = usb_alloc_event(); 231 ue->u.ue_ctrlr.ue_bus = device_unit(self); 232 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 233 234 #ifdef USB_USE_SOFTINTR 235 /* XXX we should have our own level */ 236 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 237 sc->sc_bus->methods->soft_intr, sc->sc_bus); 238 if (sc->sc_bus->soft == NULL) { 239 aprint_error("%s: can't register softintr\n", 240 device_xname(self)); 241 sc->sc_dying = 1; 242 USB_ATTACH_ERROR_RETURN; 243 } 244 #endif 245 246 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 247 &sc->sc_port); 248 if (!err) { 249 dev = sc->sc_port.device; 250 if (dev->hub == NULL) { 251 sc->sc_dying = 1; 252 aprint_error("%s: root device is not a hub\n", 253 device_xname(self)); 254 USB_ATTACH_ERROR_RETURN; 255 } 256 sc->sc_bus->root_hub = dev; 257 #if 1 258 /* 259 * Turning this code off will delay attachment of USB devices 260 * until the USB event thread is running, which means that 261 * the keyboard will not work until after cold boot. 262 */ 263 if (cold && (device_cfdata(self)->cf_flags & 1)) 264 dev->hub->explore(sc->sc_bus->root_hub); 265 #endif 266 } else { 267 aprint_error("%s: root hub problem, error=%d\n", 268 device_xname(self), err); 269 sc->sc_dying = 1; 270 } 271 272 config_pending_incr(); 273 usb_create_event_thread(self); 274 275 if (!pmf_device_register(self, NULL, NULL)) 276 aprint_error_dev(self, "couldn't establish power handler\n"); 277 278 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 279 usb_async_intr, NULL); 280 281 USB_ATTACH_SUCCESS_RETURN; 282 } 283 284 static const char *taskq_names[] = USB_TASKQ_NAMES; 285 286 void 287 usb_create_event_thread(device_t self) 288 { 289 struct usb_softc *sc = device_private(self); 290 struct usb_taskq *taskq; 291 int i; 292 293 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 294 &sc->sc_event_thread, "%s", device_xname(self))) { 295 printf("%s: unable to create event thread for\n", 296 device_xname(self)); 297 panic("usb_create_event_thread"); 298 } 299 for (i = 0; i < USB_NUM_TASKQS; i++) { 300 taskq = &usb_taskq[i]; 301 302 if (taskq->taskcreated) 303 continue; 304 305 TAILQ_INIT(&taskq->tasks); 306 taskq->taskcreated = 1; 307 taskq->name = taskq_names[i]; 308 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 309 taskq, &taskq->task_thread_lwp, taskq->name)) { 310 printf("unable to create task thread: %s\n", taskq->name); 311 panic("usb_create_event_thread task"); 312 } 313 } 314 } 315 316 /* 317 * Add a task to be performed by the task thread. This function can be 318 * called from any context and the task will be executed in a process 319 * context ASAP. 320 */ 321 void 322 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 323 { 324 struct usb_taskq *taskq; 325 int s; 326 327 taskq = &usb_taskq[queue]; 328 s = splusb(); 329 if (task->queue == -1) { 330 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 331 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 332 task->queue = queue; 333 } else { 334 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 335 } 336 wakeup(&taskq->tasks); 337 splx(s); 338 } 339 340 void 341 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 342 { 343 struct usb_taskq *taskq; 344 int s; 345 346 taskq = &usb_taskq[task->queue]; 347 s = splusb(); 348 if (task->queue != -1) { 349 TAILQ_REMOVE(&taskq->tasks, task, next); 350 task->queue = -1; 351 } 352 splx(s); 353 } 354 355 void 356 usb_event_thread(void *arg) 357 { 358 struct usb_softc *sc = arg; 359 360 DPRINTF(("usb_event_thread: start\n")); 361 362 /* 363 * In case this controller is a companion controller to an 364 * EHCI controller we need to wait until the EHCI controller 365 * has grabbed the port. 366 * XXX It would be nicer to do this with a tsleep(), but I don't 367 * know how to synchronize the creation of the threads so it 368 * will work. 369 */ 370 usb_delay_ms(sc->sc_bus, 500); 371 372 /* Make sure first discover does something. */ 373 sc->sc_bus->needs_explore = 1; 374 usb_discover(sc); 375 config_pending_decr(); 376 377 while (!sc->sc_dying) { 378 #ifdef USB_DEBUG 379 if (usb_noexplore < 2) 380 #endif 381 usb_discover(sc); 382 #ifdef USB_DEBUG 383 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 384 usb_noexplore ? 0 : hz * 60); 385 #else 386 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 387 hz * 60); 388 #endif 389 DPRINTFN(2,("usb_event_thread: woke up\n")); 390 } 391 sc->sc_event_thread = NULL; 392 393 /* In case parent is waiting for us to exit. */ 394 wakeup(sc); 395 396 DPRINTF(("usb_event_thread: exit\n")); 397 kthread_exit(0); 398 } 399 400 void 401 usb_task_thread(void *arg) 402 { 403 struct usb_task *task; 404 struct usb_taskq *taskq; 405 int s; 406 407 taskq = arg; 408 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 409 410 s = splusb(); 411 for (;;) { 412 task = TAILQ_FIRST(&taskq->tasks); 413 if (task == NULL) { 414 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 415 task = TAILQ_FIRST(&taskq->tasks); 416 } 417 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 418 if (task != NULL) { 419 TAILQ_REMOVE(&taskq->tasks, task, next); 420 task->queue = -1; 421 splx(s); 422 task->fun(task->arg); 423 s = splusb(); 424 } 425 } 426 } 427 428 int 429 usbctlprint(void *aux, const char *pnp) 430 { 431 /* only "usb"es can attach to host controllers */ 432 if (pnp) 433 aprint_normal("usb at %s", pnp); 434 435 return (UNCONF); 436 } 437 438 int 439 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 440 { 441 int unit = minor(dev); 442 struct usb_softc *sc; 443 444 if (unit == USB_DEV_MINOR) { 445 if (usb_dev_open) 446 return (EBUSY); 447 usb_dev_open = 1; 448 mutex_enter(proc_lock); 449 usb_async_proc = 0; 450 mutex_exit(proc_lock); 451 return (0); 452 } 453 454 sc = device_lookup_private(&usb_cd, unit); 455 if (!sc) 456 return (ENXIO); 457 458 if (sc->sc_dying) 459 return (EIO); 460 461 return (0); 462 } 463 464 int 465 usbread(dev_t dev, struct uio *uio, int flag) 466 { 467 struct usb_event *ue; 468 #ifdef COMPAT_30 469 struct usb_event_old *ueo = NULL; /* XXXGCC */ 470 #endif 471 int s, error, n, useold; 472 473 if (minor(dev) != USB_DEV_MINOR) 474 return (ENXIO); 475 476 useold = 0; 477 switch (uio->uio_resid) { 478 #ifdef COMPAT_30 479 case sizeof(struct usb_event_old): 480 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 481 M_WAITOK|M_ZERO); 482 useold = 1; 483 /* FALLTHRU */ 484 #endif 485 case sizeof(struct usb_event): 486 ue = usb_alloc_event(); 487 break; 488 default: 489 return (EINVAL); 490 } 491 492 error = 0; 493 s = splusb(); 494 for (;;) { 495 n = usb_get_next_event(ue); 496 if (n != 0) 497 break; 498 if (flag & IO_NDELAY) { 499 error = EWOULDBLOCK; 500 break; 501 } 502 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 503 if (error) 504 break; 505 } 506 splx(s); 507 if (!error) { 508 #ifdef COMPAT_30 509 if (useold) { /* copy fields to old struct */ 510 ueo->ue_type = ue->ue_type; 511 memcpy(&ueo->ue_time, &ue->ue_time, 512 sizeof(struct timespec)); 513 switch (ue->ue_type) { 514 case USB_EVENT_DEVICE_ATTACH: 515 case USB_EVENT_DEVICE_DETACH: 516 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 517 break; 518 519 case USB_EVENT_CTRLR_ATTACH: 520 case USB_EVENT_CTRLR_DETACH: 521 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 522 break; 523 524 case USB_EVENT_DRIVER_ATTACH: 525 case USB_EVENT_DRIVER_DETACH: 526 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 527 memcpy(ueo->u.ue_driver.ue_devname, 528 ue->u.ue_driver.ue_devname, 529 sizeof(ue->u.ue_driver.ue_devname)); 530 break; 531 default: 532 ; 533 } 534 535 error = uiomove((void *)ueo, sizeof *ueo, uio); 536 } else 537 #endif 538 error = uiomove((void *)ue, sizeof *ue, uio); 539 } 540 usb_free_event(ue); 541 #ifdef COMPAT_30 542 if (useold) 543 free(ueo, M_USBDEV); 544 #endif 545 546 return (error); 547 } 548 549 int 550 usbclose(dev_t dev, int flag, int mode, 551 struct lwp *l) 552 { 553 int unit = minor(dev); 554 555 if (unit == USB_DEV_MINOR) { 556 mutex_enter(proc_lock); 557 usb_async_proc = 0; 558 mutex_exit(proc_lock); 559 usb_dev_open = 0; 560 } 561 562 return (0); 563 } 564 565 int 566 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 567 { 568 struct usb_softc *sc; 569 int unit = minor(devt); 570 571 if (unit == USB_DEV_MINOR) { 572 switch (cmd) { 573 case FIONBIO: 574 /* All handled in the upper FS layer. */ 575 return (0); 576 577 case FIOASYNC: 578 mutex_enter(proc_lock); 579 if (*(int *)data) 580 usb_async_proc = l->l_proc; 581 else 582 usb_async_proc = 0; 583 mutex_exit(proc_lock); 584 return (0); 585 586 default: 587 return (EINVAL); 588 } 589 } 590 591 sc = device_lookup_private(&usb_cd, unit); 592 593 if (sc->sc_dying) 594 return (EIO); 595 596 switch (cmd) { 597 #ifdef USB_DEBUG 598 case USB_SETDEBUG: 599 if (!(flag & FWRITE)) 600 return (EBADF); 601 usbdebug = ((*(int *)data) & 0x000000ff); 602 #if defined(UHCI_DEBUG) && NUHCI > 0 603 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 604 #endif 605 #if defined(OHCI_DEBUG) && NOHCI > 0 606 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 607 #endif 608 break; 609 #endif /* USB_DEBUG */ 610 case USB_REQUEST: 611 { 612 struct usb_ctl_request *ur = (void *)data; 613 int len = UGETW(ur->ucr_request.wLength); 614 struct iovec iov; 615 struct uio uio; 616 void *ptr = 0; 617 int addr = ur->ucr_addr; 618 usbd_status err; 619 int error = 0; 620 621 if (!(flag & FWRITE)) 622 return (EBADF); 623 624 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 625 if (len < 0 || len > 32768) 626 return (EINVAL); 627 if (addr < 0 || addr >= USB_MAX_DEVICES || 628 sc->sc_bus->devices[addr] == 0) 629 return (EINVAL); 630 if (len != 0) { 631 iov.iov_base = (void *)ur->ucr_data; 632 iov.iov_len = len; 633 uio.uio_iov = &iov; 634 uio.uio_iovcnt = 1; 635 uio.uio_resid = len; 636 uio.uio_offset = 0; 637 uio.uio_rw = 638 ur->ucr_request.bmRequestType & UT_READ ? 639 UIO_READ : UIO_WRITE; 640 uio.uio_vmspace = l->l_proc->p_vmspace; 641 ptr = malloc(len, M_TEMP, M_WAITOK); 642 if (uio.uio_rw == UIO_WRITE) { 643 error = uiomove(ptr, len, &uio); 644 if (error) 645 goto ret; 646 } 647 } 648 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 649 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 650 USBD_DEFAULT_TIMEOUT); 651 if (err) { 652 error = EIO; 653 goto ret; 654 } 655 if (len > ur->ucr_actlen) 656 len = ur->ucr_actlen; 657 if (len != 0) { 658 if (uio.uio_rw == UIO_READ) { 659 error = uiomove(ptr, len, &uio); 660 if (error) 661 goto ret; 662 } 663 } 664 ret: 665 if (ptr) 666 free(ptr, M_TEMP); 667 return (error); 668 } 669 670 case USB_DEVICEINFO: 671 { 672 usbd_device_handle dev; 673 struct usb_device_info *di = (void *)data; 674 int addr = di->udi_addr; 675 676 if (addr < 1 || addr >= USB_MAX_DEVICES) 677 return EINVAL; 678 if ((dev = sc->sc_bus->devices[addr]) == NULL) 679 return ENXIO; 680 usbd_fill_deviceinfo(dev, di, 1); 681 break; 682 } 683 684 #ifdef COMPAT_30 685 case USB_DEVICEINFO_OLD: 686 { 687 usbd_device_handle dev; 688 struct usb_device_info_old *di = (void *)data; 689 int addr = di->udi_addr; 690 691 if (addr < 1 || addr >= USB_MAX_DEVICES) 692 return EINVAL; 693 if ((dev = sc->sc_bus->devices[addr]) == NULL) 694 return ENXIO; 695 usbd_fill_deviceinfo_old(dev, di, 1); 696 break; 697 } 698 #endif 699 700 case USB_DEVICESTATS: 701 *(struct usb_device_stats *)data = sc->sc_bus->stats; 702 break; 703 704 default: 705 return (EINVAL); 706 } 707 return (0); 708 } 709 710 int 711 usbpoll(dev_t dev, int events, struct lwp *l) 712 { 713 int revents, mask, s; 714 715 if (minor(dev) == USB_DEV_MINOR) { 716 revents = 0; 717 mask = POLLIN | POLLRDNORM; 718 719 s = splusb(); 720 if (events & mask && usb_nevents > 0) 721 revents |= events & mask; 722 if (revents == 0 && events & mask) 723 selrecord(l, &usb_selevent); 724 splx(s); 725 726 return (revents); 727 } else { 728 return (0); 729 } 730 } 731 732 static void 733 filt_usbrdetach(struct knote *kn) 734 { 735 int s; 736 737 s = splusb(); 738 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 739 splx(s); 740 } 741 742 static int 743 filt_usbread(struct knote *kn, long hint) 744 { 745 746 if (usb_nevents == 0) 747 return (0); 748 749 kn->kn_data = sizeof(struct usb_event); 750 return (1); 751 } 752 753 static const struct filterops usbread_filtops = 754 { 1, NULL, filt_usbrdetach, filt_usbread }; 755 756 int 757 usbkqfilter(dev_t dev, struct knote *kn) 758 { 759 struct klist *klist; 760 int s; 761 762 switch (kn->kn_filter) { 763 case EVFILT_READ: 764 if (minor(dev) != USB_DEV_MINOR) 765 return (1); 766 klist = &usb_selevent.sel_klist; 767 kn->kn_fop = &usbread_filtops; 768 break; 769 770 default: 771 return (EINVAL); 772 } 773 774 kn->kn_hook = NULL; 775 776 s = splusb(); 777 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 778 splx(s); 779 780 return (0); 781 } 782 783 /* Explore device tree from the root. */ 784 Static void 785 usb_discover(struct usb_softc *sc) 786 { 787 788 DPRINTFN(2,("usb_discover\n")); 789 #ifdef USB_DEBUG 790 if (usb_noexplore > 1) 791 return; 792 #endif 793 /* 794 * We need mutual exclusion while traversing the device tree, 795 * but this is guaranteed since this function is only called 796 * from the event thread for the controller. 797 */ 798 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 799 sc->sc_bus->needs_explore = 0; 800 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 801 } 802 } 803 804 void 805 usb_needs_explore(usbd_device_handle dev) 806 { 807 DPRINTFN(2,("usb_needs_explore\n")); 808 dev->bus->needs_explore = 1; 809 wakeup(&dev->bus->needs_explore); 810 } 811 812 void 813 usb_needs_reattach(usbd_device_handle dev) 814 { 815 DPRINTFN(2,("usb_needs_reattach\n")); 816 dev->powersrc->reattach = 1; 817 dev->bus->needs_explore = 1; 818 wakeup(&dev->bus->needs_explore); 819 } 820 821 /* Called at splusb() */ 822 int 823 usb_get_next_event(struct usb_event *ue) 824 { 825 struct usb_event_q *ueq; 826 827 if (usb_nevents <= 0) 828 return (0); 829 ueq = SIMPLEQ_FIRST(&usb_events); 830 #ifdef DIAGNOSTIC 831 if (ueq == NULL) { 832 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 833 usb_nevents = 0; 834 return (0); 835 } 836 #endif 837 if (ue) 838 *ue = ueq->ue; 839 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 840 usb_free_event((struct usb_event *)(void *)ueq); 841 usb_nevents--; 842 return (1); 843 } 844 845 void 846 usbd_add_dev_event(int type, usbd_device_handle udev) 847 { 848 struct usb_event *ue = usb_alloc_event(); 849 850 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 851 usb_add_event(type, ue); 852 } 853 854 void 855 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 856 { 857 struct usb_event *ue = usb_alloc_event(); 858 859 ue->u.ue_driver.ue_cookie = udev->cookie; 860 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 861 sizeof ue->u.ue_driver.ue_devname); 862 usb_add_event(type, ue); 863 } 864 865 Static struct usb_event * 866 usb_alloc_event(void) 867 { 868 /* Yes, this is right; we allocate enough so that we can use it later */ 869 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 870 } 871 872 Static void 873 usb_free_event(struct usb_event *uep) 874 { 875 free(uep, M_USBDEV); 876 } 877 878 Static void 879 usb_add_event(int type, struct usb_event *uep) 880 { 881 struct usb_event_q *ueq; 882 struct timeval thetime; 883 int s; 884 885 microtime(&thetime); 886 /* Don't want to wait here inside splusb() */ 887 ueq = (struct usb_event_q *)(void *)uep; 888 ueq->ue = *uep; 889 ueq->ue.ue_type = type; 890 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 891 892 s = splusb(); 893 if (++usb_nevents >= USB_MAX_EVENTS) { 894 /* Too many queued events, drop an old one. */ 895 DPRINTFN(-1,("usb: event dropped\n")); 896 (void)usb_get_next_event(0); 897 } 898 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 899 wakeup(&usb_events); 900 selnotify(&usb_selevent, 0, 0); 901 if (usb_async_proc != NULL) { 902 softint_schedule(usb_async_sih); 903 } 904 splx(s); 905 } 906 907 Static void 908 usb_async_intr(void *cookie) 909 { 910 proc_t *proc; 911 912 mutex_enter(proc_lock); 913 if ((proc = usb_async_proc) != NULL) 914 psignal(proc, SIGIO); 915 mutex_exit(proc_lock); 916 } 917 918 void 919 usb_schedsoftintr(usbd_bus_handle bus) 920 { 921 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 922 #ifdef USB_USE_SOFTINTR 923 if (bus->use_polling) { 924 bus->methods->soft_intr(bus); 925 } else { 926 softint_schedule(bus->soft); 927 } 928 #else 929 bus->methods->soft_intr(bus); 930 #endif /* USB_USE_SOFTINTR */ 931 } 932 933 int 934 usb_activate(device_t self, enum devact act) 935 { 936 struct usb_softc *sc = device_private(self); 937 usbd_device_handle dev = sc->sc_port.device; 938 int i, rv = 0; 939 940 switch (act) { 941 case DVACT_ACTIVATE: 942 return (EOPNOTSUPP); 943 944 case DVACT_DEACTIVATE: 945 sc->sc_dying = 1; 946 if (dev != NULL && dev->cdesc != NULL && dev->subdevlen > 0) { 947 for (i = 0; i < dev->subdevlen; i++) { 948 if (!dev->subdevs[i]) 949 continue; 950 rv |= config_deactivate(dev->subdevs[i]); 951 } 952 } 953 break; 954 } 955 return (rv); 956 } 957 958 void 959 usb_childdet(device_t self, device_t child) 960 { 961 int i; 962 struct usb_softc *sc = device_private(self); 963 struct usbd_device *dev; 964 965 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 966 return; 967 968 for (i = 0; i < dev->subdevlen; i++) 969 if (dev->subdevs[i] == child) 970 dev->subdevs[i] = NULL; 971 } 972 973 int 974 usb_detach(device_t self, int flags) 975 { 976 struct usb_softc *sc = device_private(self); 977 struct usb_event *ue; 978 979 DPRINTF(("usb_detach: start\n")); 980 981 pmf_device_deregister(self); 982 /* Kill off event thread. */ 983 while (sc->sc_event_thread != NULL) { 984 wakeup(&sc->sc_bus->needs_explore); 985 tsleep(sc, PWAIT, "usbdet", hz * 60); 986 } 987 DPRINTF(("usb_detach: event thread dead\n")); 988 989 /* Make all devices disconnect. */ 990 if (sc->sc_port.device != NULL) 991 usb_disconnect_port(&sc->sc_port, self); 992 993 #ifdef USB_USE_SOFTINTR 994 if (sc->sc_bus->soft != NULL) { 995 softint_disestablish(sc->sc_bus->soft); 996 sc->sc_bus->soft = NULL; 997 } 998 #endif 999 1000 ue = usb_alloc_event(); 1001 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1002 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1003 1004 return (0); 1005 } 1006 1007 #ifdef COMPAT_30 1008 Static void 1009 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1010 const struct usb_device_info *ue) 1011 { 1012 const unsigned char *p; 1013 unsigned char *q; 1014 int i, n; 1015 1016 uo->udi_bus = ue->udi_bus; 1017 uo->udi_addr = ue->udi_addr; 1018 uo->udi_cookie = ue->udi_cookie; 1019 for (i = 0, p = (const unsigned char *)ue->udi_product, 1020 q = (unsigned char *)uo->udi_product; 1021 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1022 if (*p < 0x80) 1023 q[i++] = *p; 1024 else { 1025 q[i++] = '?'; 1026 if ((*p & 0xe0) == 0xe0) 1027 p++; 1028 p++; 1029 } 1030 } 1031 q[i] = 0; 1032 1033 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1034 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1035 if (* p < 0x80) 1036 q[i++] = *p; 1037 else { 1038 q[i++] = '?'; 1039 p++; 1040 if ((*p & 0xe0) == 0xe0) 1041 p++; 1042 } 1043 } 1044 q[i] = 0; 1045 1046 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1047 1048 uo->udi_productNo = ue->udi_productNo; 1049 uo->udi_vendorNo = ue->udi_vendorNo; 1050 uo->udi_releaseNo = ue->udi_releaseNo; 1051 uo->udi_class = ue->udi_class; 1052 uo->udi_subclass = ue->udi_subclass; 1053 uo->udi_protocol = ue->udi_protocol; 1054 uo->udi_config = ue->udi_config; 1055 uo->udi_speed = ue->udi_speed; 1056 uo->udi_power = ue->udi_power; 1057 uo->udi_nports = ue->udi_nports; 1058 1059 for (n=0; n<USB_MAX_DEVNAMES; n++) 1060 memcpy(uo->udi_devnames[n], 1061 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1062 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1063 } 1064 #endif 1065
Indexes created Mon Sep 29 21:09:56 GMT 2025