usb.c revision 1.116
1 /* $NetBSD: usb.c,v 1.116 2009/04/07 18:15:45 dyoung 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 1.116 2009/04/07 18:15:45 dyoung 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_DECL3_NEW(usb, sizeof(struct usb_softc), 166 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 167 DVF_DETACH_SHUTDOWN); 168 169 USB_MATCH(usb) 170 { 171 DPRINTF(("usbd_match\n")); 172 return (UMATCH_GENERIC); 173 } 174 175 USB_ATTACH(usb) 176 { 177 struct usb_softc *sc = device_private(self); 178 int usbrev; 179 180 sc->sc_bus = aux; 181 usbrev = sc->sc_bus->usbrev; 182 183 aprint_naive("\n"); 184 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 185 switch (usbrev) { 186 case USBREV_1_0: 187 case USBREV_1_1: 188 case USBREV_2_0: 189 break; 190 default: 191 aprint_error(", not supported\n"); 192 sc->sc_dying = 1; 193 USB_ATTACH_ERROR_RETURN; 194 } 195 aprint_normal("\n"); 196 197 config_interrupts(self, usb_doattach); 198 } 199 200 static void 201 usb_doattach(device_t self) 202 { 203 static bool usb_selevent_init; /* XXX */ 204 struct usb_softc *sc = device_private(self); 205 usbd_device_handle dev; 206 usbd_status err; 207 int speed; 208 struct usb_event *ue; 209 210 if (!usb_selevent_init) { 211 selinit(&usb_selevent); 212 usb_selevent_init = true; 213 } 214 DPRINTF(("usbd_doattach\n")); 215 216 sc->sc_bus->usbctl = self; 217 sc->sc_port.power = USB_MAX_POWER; 218 219 switch (sc->sc_bus->usbrev) { 220 case USBREV_1_0: 221 case USBREV_1_1: 222 speed = USB_SPEED_FULL; 223 break; 224 case USBREV_2_0: 225 speed = USB_SPEED_HIGH; 226 break; 227 default: 228 panic("usb_doattach"); 229 } 230 231 ue = usb_alloc_event(); 232 ue->u.ue_ctrlr.ue_bus = device_unit(self); 233 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 234 235 #ifdef USB_USE_SOFTINTR 236 /* XXX we should have our own level */ 237 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 238 sc->sc_bus->methods->soft_intr, sc->sc_bus); 239 if (sc->sc_bus->soft == NULL) { 240 aprint_error("%s: can't register softintr\n", 241 device_xname(self)); 242 sc->sc_dying = 1; 243 USB_ATTACH_ERROR_RETURN; 244 } 245 #endif 246 247 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 248 &sc->sc_port); 249 if (!err) { 250 dev = sc->sc_port.device; 251 if (dev->hub == NULL) { 252 sc->sc_dying = 1; 253 aprint_error("%s: root device is not a hub\n", 254 device_xname(self)); 255 USB_ATTACH_ERROR_RETURN; 256 } 257 sc->sc_bus->root_hub = dev; 258 #if 1 259 /* 260 * Turning this code off will delay attachment of USB devices 261 * until the USB event thread is running, which means that 262 * the keyboard will not work until after cold boot. 263 */ 264 if (cold && (device_cfdata(self)->cf_flags & 1)) 265 dev->hub->explore(sc->sc_bus->root_hub); 266 #endif 267 } else { 268 aprint_error("%s: root hub problem, error=%d\n", 269 device_xname(self), err); 270 sc->sc_dying = 1; 271 } 272 273 config_pending_incr(); 274 usb_create_event_thread(self); 275 276 if (!pmf_device_register(self, NULL, NULL)) 277 aprint_error_dev(self, "couldn't establish power handler\n"); 278 279 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 280 usb_async_intr, NULL); 281 282 USB_ATTACH_SUCCESS_RETURN; 283 } 284 285 static const char *taskq_names[] = USB_TASKQ_NAMES; 286 287 void 288 usb_create_event_thread(device_t self) 289 { 290 struct usb_softc *sc = device_private(self); 291 struct usb_taskq *taskq; 292 int i; 293 294 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 295 &sc->sc_event_thread, "%s", device_xname(self))) { 296 printf("%s: unable to create event thread for\n", 297 device_xname(self)); 298 panic("usb_create_event_thread"); 299 } 300 for (i = 0; i < USB_NUM_TASKQS; i++) { 301 taskq = &usb_taskq[i]; 302 303 if (taskq->taskcreated) 304 continue; 305 306 TAILQ_INIT(&taskq->tasks); 307 taskq->taskcreated = 1; 308 taskq->name = taskq_names[i]; 309 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 310 taskq, &taskq->task_thread_lwp, taskq->name)) { 311 printf("unable to create task thread: %s\n", taskq->name); 312 panic("usb_create_event_thread task"); 313 } 314 } 315 } 316 317 /* 318 * Add a task to be performed by the task thread. This function can be 319 * called from any context and the task will be executed in a process 320 * context ASAP. 321 */ 322 void 323 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 324 { 325 struct usb_taskq *taskq; 326 int s; 327 328 taskq = &usb_taskq[queue]; 329 s = splusb(); 330 if (task->queue == -1) { 331 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 332 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 333 task->queue = queue; 334 } else { 335 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 336 } 337 wakeup(&taskq->tasks); 338 splx(s); 339 } 340 341 void 342 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 343 { 344 struct usb_taskq *taskq; 345 int s; 346 347 taskq = &usb_taskq[task->queue]; 348 s = splusb(); 349 if (task->queue != -1) { 350 TAILQ_REMOVE(&taskq->tasks, task, next); 351 task->queue = -1; 352 } 353 splx(s); 354 } 355 356 void 357 usb_event_thread(void *arg) 358 { 359 struct usb_softc *sc = arg; 360 361 DPRINTF(("usb_event_thread: start\n")); 362 363 /* 364 * In case this controller is a companion controller to an 365 * EHCI controller we need to wait until the EHCI controller 366 * has grabbed the port. 367 * XXX It would be nicer to do this with a tsleep(), but I don't 368 * know how to synchronize the creation of the threads so it 369 * will work. 370 */ 371 usb_delay_ms(sc->sc_bus, 500); 372 373 /* Make sure first discover does something. */ 374 sc->sc_bus->needs_explore = 1; 375 usb_discover(sc); 376 config_pending_decr(); 377 378 while (!sc->sc_dying) { 379 #ifdef USB_DEBUG 380 if (usb_noexplore < 2) 381 #endif 382 usb_discover(sc); 383 #ifdef USB_DEBUG 384 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 385 usb_noexplore ? 0 : hz * 60); 386 #else 387 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 388 hz * 60); 389 #endif 390 DPRINTFN(2,("usb_event_thread: woke up\n")); 391 } 392 sc->sc_event_thread = NULL; 393 394 /* In case parent is waiting for us to exit. */ 395 wakeup(sc); 396 397 DPRINTF(("usb_event_thread: exit\n")); 398 kthread_exit(0); 399 } 400 401 void 402 usb_task_thread(void *arg) 403 { 404 struct usb_task *task; 405 struct usb_taskq *taskq; 406 int s; 407 408 taskq = arg; 409 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 410 411 s = splusb(); 412 for (;;) { 413 task = TAILQ_FIRST(&taskq->tasks); 414 if (task == NULL) { 415 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 416 task = TAILQ_FIRST(&taskq->tasks); 417 } 418 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 419 if (task != NULL) { 420 TAILQ_REMOVE(&taskq->tasks, task, next); 421 task->queue = -1; 422 splx(s); 423 task->fun(task->arg); 424 s = splusb(); 425 } 426 } 427 } 428 429 int 430 usbctlprint(void *aux, const char *pnp) 431 { 432 /* only "usb"es can attach to host controllers */ 433 if (pnp) 434 aprint_normal("usb at %s", pnp); 435 436 return (UNCONF); 437 } 438 439 int 440 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 441 { 442 int unit = minor(dev); 443 struct usb_softc *sc; 444 445 if (unit == USB_DEV_MINOR) { 446 if (usb_dev_open) 447 return (EBUSY); 448 usb_dev_open = 1; 449 mutex_enter(proc_lock); 450 usb_async_proc = 0; 451 mutex_exit(proc_lock); 452 return (0); 453 } 454 455 sc = device_lookup_private(&usb_cd, unit); 456 if (!sc) 457 return (ENXIO); 458 459 if (sc->sc_dying) 460 return (EIO); 461 462 return (0); 463 } 464 465 int 466 usbread(dev_t dev, struct uio *uio, int flag) 467 { 468 struct usb_event *ue; 469 #ifdef COMPAT_30 470 struct usb_event_old *ueo = NULL; /* XXXGCC */ 471 #endif 472 int s, error, n, useold; 473 474 if (minor(dev) != USB_DEV_MINOR) 475 return (ENXIO); 476 477 useold = 0; 478 switch (uio->uio_resid) { 479 #ifdef COMPAT_30 480 case sizeof(struct usb_event_old): 481 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 482 M_WAITOK|M_ZERO); 483 useold = 1; 484 /* FALLTHRU */ 485 #endif 486 case sizeof(struct usb_event): 487 ue = usb_alloc_event(); 488 break; 489 default: 490 return (EINVAL); 491 } 492 493 error = 0; 494 s = splusb(); 495 for (;;) { 496 n = usb_get_next_event(ue); 497 if (n != 0) 498 break; 499 if (flag & IO_NDELAY) { 500 error = EWOULDBLOCK; 501 break; 502 } 503 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 504 if (error) 505 break; 506 } 507 splx(s); 508 if (!error) { 509 #ifdef COMPAT_30 510 if (useold) { /* copy fields to old struct */ 511 ueo->ue_type = ue->ue_type; 512 memcpy(&ueo->ue_time, &ue->ue_time, 513 sizeof(struct timespec)); 514 switch (ue->ue_type) { 515 case USB_EVENT_DEVICE_ATTACH: 516 case USB_EVENT_DEVICE_DETACH: 517 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 518 break; 519 520 case USB_EVENT_CTRLR_ATTACH: 521 case USB_EVENT_CTRLR_DETACH: 522 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 523 break; 524 525 case USB_EVENT_DRIVER_ATTACH: 526 case USB_EVENT_DRIVER_DETACH: 527 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 528 memcpy(ueo->u.ue_driver.ue_devname, 529 ue->u.ue_driver.ue_devname, 530 sizeof(ue->u.ue_driver.ue_devname)); 531 break; 532 default: 533 ; 534 } 535 536 error = uiomove((void *)ueo, sizeof *ueo, uio); 537 } else 538 #endif 539 error = uiomove((void *)ue, sizeof *ue, uio); 540 } 541 usb_free_event(ue); 542 #ifdef COMPAT_30 543 if (useold) 544 free(ueo, M_USBDEV); 545 #endif 546 547 return (error); 548 } 549 550 int 551 usbclose(dev_t dev, int flag, int mode, 552 struct lwp *l) 553 { 554 int unit = minor(dev); 555 556 if (unit == USB_DEV_MINOR) { 557 mutex_enter(proc_lock); 558 usb_async_proc = 0; 559 mutex_exit(proc_lock); 560 usb_dev_open = 0; 561 } 562 563 return (0); 564 } 565 566 int 567 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 568 { 569 struct usb_softc *sc; 570 int unit = minor(devt); 571 572 if (unit == USB_DEV_MINOR) { 573 switch (cmd) { 574 case FIONBIO: 575 /* All handled in the upper FS layer. */ 576 return (0); 577 578 case FIOASYNC: 579 mutex_enter(proc_lock); 580 if (*(int *)data) 581 usb_async_proc = l->l_proc; 582 else 583 usb_async_proc = 0; 584 mutex_exit(proc_lock); 585 return (0); 586 587 default: 588 return (EINVAL); 589 } 590 } 591 592 sc = device_lookup_private(&usb_cd, unit); 593 594 if (sc->sc_dying) 595 return (EIO); 596 597 switch (cmd) { 598 #ifdef USB_DEBUG 599 case USB_SETDEBUG: 600 if (!(flag & FWRITE)) 601 return (EBADF); 602 usbdebug = ((*(int *)data) & 0x000000ff); 603 #if defined(UHCI_DEBUG) && NUHCI > 0 604 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 605 #endif 606 #if defined(OHCI_DEBUG) && NOHCI > 0 607 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 608 #endif 609 break; 610 #endif /* USB_DEBUG */ 611 case USB_REQUEST: 612 { 613 struct usb_ctl_request *ur = (void *)data; 614 int len = UGETW(ur->ucr_request.wLength); 615 struct iovec iov; 616 struct uio uio; 617 void *ptr = 0; 618 int addr = ur->ucr_addr; 619 usbd_status err; 620 int error = 0; 621 622 if (!(flag & FWRITE)) 623 return (EBADF); 624 625 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 626 if (len < 0 || len > 32768) 627 return (EINVAL); 628 if (addr < 0 || addr >= USB_MAX_DEVICES || 629 sc->sc_bus->devices[addr] == 0) 630 return (EINVAL); 631 if (len != 0) { 632 iov.iov_base = (void *)ur->ucr_data; 633 iov.iov_len = len; 634 uio.uio_iov = &iov; 635 uio.uio_iovcnt = 1; 636 uio.uio_resid = len; 637 uio.uio_offset = 0; 638 uio.uio_rw = 639 ur->ucr_request.bmRequestType & UT_READ ? 640 UIO_READ : UIO_WRITE; 641 uio.uio_vmspace = l->l_proc->p_vmspace; 642 ptr = malloc(len, M_TEMP, M_WAITOK); 643 if (uio.uio_rw == UIO_WRITE) { 644 error = uiomove(ptr, len, &uio); 645 if (error) 646 goto ret; 647 } 648 } 649 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 650 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 651 USBD_DEFAULT_TIMEOUT); 652 if (err) { 653 error = EIO; 654 goto ret; 655 } 656 if (len > ur->ucr_actlen) 657 len = ur->ucr_actlen; 658 if (len != 0) { 659 if (uio.uio_rw == UIO_READ) { 660 error = uiomove(ptr, len, &uio); 661 if (error) 662 goto ret; 663 } 664 } 665 ret: 666 if (ptr) 667 free(ptr, M_TEMP); 668 return (error); 669 } 670 671 case USB_DEVICEINFO: 672 { 673 usbd_device_handle dev; 674 struct usb_device_info *di = (void *)data; 675 int addr = di->udi_addr; 676 677 if (addr < 1 || addr >= USB_MAX_DEVICES) 678 return EINVAL; 679 if ((dev = sc->sc_bus->devices[addr]) == NULL) 680 return ENXIO; 681 usbd_fill_deviceinfo(dev, di, 1); 682 break; 683 } 684 685 #ifdef COMPAT_30 686 case USB_DEVICEINFO_OLD: 687 { 688 usbd_device_handle dev; 689 struct usb_device_info_old *di = (void *)data; 690 int addr = di->udi_addr; 691 692 if (addr < 1 || addr >= USB_MAX_DEVICES) 693 return EINVAL; 694 if ((dev = sc->sc_bus->devices[addr]) == NULL) 695 return ENXIO; 696 usbd_fill_deviceinfo_old(dev, di, 1); 697 break; 698 } 699 #endif 700 701 case USB_DEVICESTATS: 702 *(struct usb_device_stats *)data = sc->sc_bus->stats; 703 break; 704 705 default: 706 return (EINVAL); 707 } 708 return (0); 709 } 710 711 int 712 usbpoll(dev_t dev, int events, struct lwp *l) 713 { 714 int revents, mask, s; 715 716 if (minor(dev) == USB_DEV_MINOR) { 717 revents = 0; 718 mask = POLLIN | POLLRDNORM; 719 720 s = splusb(); 721 if (events & mask && usb_nevents > 0) 722 revents |= events & mask; 723 if (revents == 0 && events & mask) 724 selrecord(l, &usb_selevent); 725 splx(s); 726 727 return (revents); 728 } else { 729 return (0); 730 } 731 } 732 733 static void 734 filt_usbrdetach(struct knote *kn) 735 { 736 int s; 737 738 s = splusb(); 739 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 740 splx(s); 741 } 742 743 static int 744 filt_usbread(struct knote *kn, long hint) 745 { 746 747 if (usb_nevents == 0) 748 return (0); 749 750 kn->kn_data = sizeof(struct usb_event); 751 return (1); 752 } 753 754 static const struct filterops usbread_filtops = 755 { 1, NULL, filt_usbrdetach, filt_usbread }; 756 757 int 758 usbkqfilter(dev_t dev, struct knote *kn) 759 { 760 struct klist *klist; 761 int s; 762 763 switch (kn->kn_filter) { 764 case EVFILT_READ: 765 if (minor(dev) != USB_DEV_MINOR) 766 return (1); 767 klist = &usb_selevent.sel_klist; 768 kn->kn_fop = &usbread_filtops; 769 break; 770 771 default: 772 return (EINVAL); 773 } 774 775 kn->kn_hook = NULL; 776 777 s = splusb(); 778 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 779 splx(s); 780 781 return (0); 782 } 783 784 /* Explore device tree from the root. */ 785 Static void 786 usb_discover(struct usb_softc *sc) 787 { 788 789 DPRINTFN(2,("usb_discover\n")); 790 #ifdef USB_DEBUG 791 if (usb_noexplore > 1) 792 return; 793 #endif 794 /* 795 * We need mutual exclusion while traversing the device tree, 796 * but this is guaranteed since this function is only called 797 * from the event thread for the controller. 798 */ 799 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 800 sc->sc_bus->needs_explore = 0; 801 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 802 } 803 } 804 805 void 806 usb_needs_explore(usbd_device_handle dev) 807 { 808 DPRINTFN(2,("usb_needs_explore\n")); 809 dev->bus->needs_explore = 1; 810 wakeup(&dev->bus->needs_explore); 811 } 812 813 void 814 usb_needs_reattach(usbd_device_handle dev) 815 { 816 DPRINTFN(2,("usb_needs_reattach\n")); 817 dev->powersrc->reattach = 1; 818 dev->bus->needs_explore = 1; 819 wakeup(&dev->bus->needs_explore); 820 } 821 822 /* Called at splusb() */ 823 int 824 usb_get_next_event(struct usb_event *ue) 825 { 826 struct usb_event_q *ueq; 827 828 if (usb_nevents <= 0) 829 return (0); 830 ueq = SIMPLEQ_FIRST(&usb_events); 831 #ifdef DIAGNOSTIC 832 if (ueq == NULL) { 833 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 834 usb_nevents = 0; 835 return (0); 836 } 837 #endif 838 if (ue) 839 *ue = ueq->ue; 840 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 841 usb_free_event((struct usb_event *)(void *)ueq); 842 usb_nevents--; 843 return (1); 844 } 845 846 void 847 usbd_add_dev_event(int type, usbd_device_handle udev) 848 { 849 struct usb_event *ue = usb_alloc_event(); 850 851 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 852 usb_add_event(type, ue); 853 } 854 855 void 856 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 857 { 858 struct usb_event *ue = usb_alloc_event(); 859 860 ue->u.ue_driver.ue_cookie = udev->cookie; 861 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 862 sizeof ue->u.ue_driver.ue_devname); 863 usb_add_event(type, ue); 864 } 865 866 Static struct usb_event * 867 usb_alloc_event(void) 868 { 869 /* Yes, this is right; we allocate enough so that we can use it later */ 870 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 871 } 872 873 Static void 874 usb_free_event(struct usb_event *uep) 875 { 876 free(uep, M_USBDEV); 877 } 878 879 Static void 880 usb_add_event(int type, struct usb_event *uep) 881 { 882 struct usb_event_q *ueq; 883 struct timeval thetime; 884 int s; 885 886 microtime(&thetime); 887 /* Don't want to wait here inside splusb() */ 888 ueq = (struct usb_event_q *)(void *)uep; 889 ueq->ue = *uep; 890 ueq->ue.ue_type = type; 891 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 892 893 s = splusb(); 894 if (++usb_nevents >= USB_MAX_EVENTS) { 895 /* Too many queued events, drop an old one. */ 896 DPRINTFN(-1,("usb: event dropped\n")); 897 (void)usb_get_next_event(0); 898 } 899 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 900 wakeup(&usb_events); 901 selnotify(&usb_selevent, 0, 0); 902 if (usb_async_proc != NULL) { 903 softint_schedule(usb_async_sih); 904 } 905 splx(s); 906 } 907 908 Static void 909 usb_async_intr(void *cookie) 910 { 911 proc_t *proc; 912 913 mutex_enter(proc_lock); 914 if ((proc = usb_async_proc) != NULL) 915 psignal(proc, SIGIO); 916 mutex_exit(proc_lock); 917 } 918 919 void 920 usb_schedsoftintr(usbd_bus_handle bus) 921 { 922 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 923 #ifdef USB_USE_SOFTINTR 924 if (bus->use_polling) { 925 bus->methods->soft_intr(bus); 926 } else { 927 softint_schedule(bus->soft); 928 } 929 #else 930 bus->methods->soft_intr(bus); 931 #endif /* USB_USE_SOFTINTR */ 932 } 933 934 int 935 usb_activate(device_t self, enum devact act) 936 { 937 struct usb_softc *sc = device_private(self); 938 usbd_device_handle dev = sc->sc_port.device; 939 int i, rv = 0; 940 941 switch (act) { 942 case DVACT_ACTIVATE: 943 return (EOPNOTSUPP); 944 945 case DVACT_DEACTIVATE: 946 sc->sc_dying = 1; 947 if (dev != NULL && dev->cdesc != NULL && dev->subdevlen > 0) { 948 for (i = 0; i < dev->subdevlen; i++) { 949 if (!dev->subdevs[i]) 950 continue; 951 rv |= config_deactivate(dev->subdevs[i]); 952 } 953 } 954 break; 955 } 956 return (rv); 957 } 958 959 void 960 usb_childdet(device_t self, device_t child) 961 { 962 int i; 963 struct usb_softc *sc = device_private(self); 964 struct usbd_device *dev; 965 966 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 967 return; 968 969 for (i = 0; i < dev->subdevlen; i++) 970 if (dev->subdevs[i] == child) 971 dev->subdevs[i] = NULL; 972 } 973 974 int 975 usb_detach(device_t self, int flags) 976 { 977 struct usb_softc *sc = device_private(self); 978 struct usb_event *ue; 979 980 DPRINTF(("usb_detach: start\n")); 981 982 pmf_device_deregister(self); 983 /* Kill off event thread. */ 984 while (sc->sc_event_thread != NULL) { 985 wakeup(&sc->sc_bus->needs_explore); 986 tsleep(sc, PWAIT, "usbdet", hz * 60); 987 } 988 DPRINTF(("usb_detach: event thread dead\n")); 989 990 /* Make all devices disconnect. */ 991 if (sc->sc_port.device != NULL) 992 usb_disconnect_port(&sc->sc_port, self); 993 994 #ifdef USB_USE_SOFTINTR 995 if (sc->sc_bus->soft != NULL) { 996 softint_disestablish(sc->sc_bus->soft); 997 sc->sc_bus->soft = NULL; 998 } 999 #endif 1000 1001 ue = usb_alloc_event(); 1002 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1003 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1004 1005 return (0); 1006 } 1007 1008 #ifdef COMPAT_30 1009 Static void 1010 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1011 const struct usb_device_info *ue) 1012 { 1013 const unsigned char *p; 1014 unsigned char *q; 1015 int i, n; 1016 1017 uo->udi_bus = ue->udi_bus; 1018 uo->udi_addr = ue->udi_addr; 1019 uo->udi_cookie = ue->udi_cookie; 1020 for (i = 0, p = (const unsigned char *)ue->udi_product, 1021 q = (unsigned char *)uo->udi_product; 1022 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1023 if (*p < 0x80) 1024 q[i++] = *p; 1025 else { 1026 q[i++] = '?'; 1027 if ((*p & 0xe0) == 0xe0) 1028 p++; 1029 p++; 1030 } 1031 } 1032 q[i] = 0; 1033 1034 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1035 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1036 if (* p < 0x80) 1037 q[i++] = *p; 1038 else { 1039 q[i++] = '?'; 1040 p++; 1041 if ((*p & 0xe0) == 0xe0) 1042 p++; 1043 } 1044 } 1045 q[i] = 0; 1046 1047 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1048 1049 uo->udi_productNo = ue->udi_productNo; 1050 uo->udi_vendorNo = ue->udi_vendorNo; 1051 uo->udi_releaseNo = ue->udi_releaseNo; 1052 uo->udi_class = ue->udi_class; 1053 uo->udi_subclass = ue->udi_subclass; 1054 uo->udi_protocol = ue->udi_protocol; 1055 uo->udi_config = ue->udi_config; 1056 uo->udi_speed = ue->udi_speed; 1057 uo->udi_power = ue->udi_power; 1058 uo->udi_nports = ue->udi_nports; 1059 1060 for (n=0; n<USB_MAX_DEVNAMES; n++) 1061 memcpy(uo->udi_devnames[n], 1062 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1063 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1064 } 1065 #endif 1066
Indexes created Thu Sep 25 16:09:42 GMT 2025