usb.c revision 1.107
1 /* $NetBSD: usb.c,v 1.107 2008/03/01 14:16:51 rmind 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 1.107 2008/03/01 14:16:51 rmind Exp $"); 48 49 #include "opt_compat_netbsd.h" 50 51 #include "ohci.h" 52 #include "uhci.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/device.h> 59 #include <sys/kthread.h> 60 #include <sys/proc.h> 61 #include <sys/conf.h> 62 #include <sys/fcntl.h> 63 #include <sys/poll.h> 64 #include <sys/select.h> 65 #include <sys/vnode.h> 66 #include <sys/signalvar.h> 67 #include <sys/intr.h> 68 69 #include <dev/usb/usb.h> 70 #include <dev/usb/usbdi.h> 71 #include <dev/usb/usbdi_util.h> 72 73 #define USB_DEV_MINOR 255 74 75 #include <sys/bus.h> 76 77 #include <dev/usb/usbdivar.h> 78 #include <dev/usb/usb_quirks.h> 79 80 #ifdef USB_DEBUG 81 #define DPRINTF(x) if (usbdebug) logprintf x 82 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 83 int usbdebug = 0; 84 #if defined(UHCI_DEBUG) && NUHCI > 0 85 extern int uhcidebug; 86 #endif 87 #if defined(OHCI_DEBUG) && NOHCI > 0 88 extern int ohcidebug; 89 #endif 90 /* 91 * 0 - do usual exploration 92 * 1 - do not use timeout exploration 93 * >1 - do no exploration 94 */ 95 int usb_noexplore = 0; 96 #else 97 #define DPRINTF(x) 98 #define DPRINTFN(n,x) 99 #endif 100 101 struct usb_softc { 102 USBBASEDEVICE sc_dev; /* base device */ 103 usbd_bus_handle sc_bus; /* USB controller */ 104 struct usbd_port sc_port; /* dummy port for root hub */ 105 106 struct lwp *sc_event_thread; 107 108 char sc_dying; 109 }; 110 111 struct usb_taskq { 112 TAILQ_HEAD(, usb_task) tasks; 113 struct lwp *task_thread_lwp; 114 const char *name; 115 int taskcreated; /* task thread exists. */ 116 }; 117 118 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 119 120 dev_type_open(usbopen); 121 dev_type_close(usbclose); 122 dev_type_read(usbread); 123 dev_type_ioctl(usbioctl); 124 dev_type_poll(usbpoll); 125 dev_type_kqfilter(usbkqfilter); 126 127 const struct cdevsw usb_cdevsw = { 128 usbopen, usbclose, usbread, nowrite, usbioctl, 129 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 130 }; 131 132 Static void usb_discover(void *); 133 Static void usb_create_event_thread(void *); 134 Static void usb_event_thread(void *); 135 Static void usb_task_thread(void *); 136 137 #define USB_MAX_EVENTS 100 138 struct usb_event_q { 139 struct usb_event ue; 140 SIMPLEQ_ENTRY(usb_event_q) next; 141 }; 142 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 143 SIMPLEQ_HEAD_INITIALIZER(usb_events); 144 Static int usb_nevents = 0; 145 Static struct selinfo usb_selevent; 146 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 147 Static int usb_dev_open = 0; 148 Static struct usb_event *usb_alloc_event(void); 149 Static void usb_free_event(struct usb_event *); 150 Static void usb_add_event(int, struct usb_event *); 151 152 Static int usb_get_next_event(struct usb_event *); 153 154 #ifdef COMPAT_30 155 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 156 #endif 157 158 Static const char *usbrev_str[] = USBREV_STR; 159 160 static int usb_match(device_t, struct cfdata *, void *); 161 static void usb_attach(device_t, device_t, void *); 162 static int usb_detach(device_t, int); 163 static int usb_activate(device_t, enum devact); 164 static void usb_childdet(device_t, device_t); 165 166 extern struct cfdriver usb_cd; 167 168 CFATTACH_DECL2(usb, sizeof(struct usb_softc), 169 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet); 170 171 USB_MATCH(usb) 172 { 173 DPRINTF(("usbd_match\n")); 174 return (UMATCH_GENERIC); 175 } 176 177 USB_ATTACH(usb) 178 { 179 static bool usb_selevent_init; /* XXX */ 180 struct usb_softc *sc = (struct usb_softc *)self; 181 usbd_device_handle dev; 182 usbd_status err; 183 int usbrev; 184 int speed; 185 struct usb_event *ue; 186 187 if (!usb_selevent_init) { 188 selinit(&usb_selevent); 189 usb_selevent_init = true; 190 } 191 DPRINTF(("usbd_attach\n")); 192 193 sc->sc_bus = aux; 194 sc->sc_bus->usbctl = sc; 195 sc->sc_port.power = USB_MAX_POWER; 196 197 usbrev = sc->sc_bus->usbrev; 198 aprint_naive("\n"); 199 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 200 switch (usbrev) { 201 case USBREV_1_0: 202 case USBREV_1_1: 203 speed = USB_SPEED_FULL; 204 break; 205 case USBREV_2_0: 206 speed = USB_SPEED_HIGH; 207 break; 208 default: 209 aprint_error(", not supported\n"); 210 sc->sc_dying = 1; 211 USB_ATTACH_ERROR_RETURN; 212 } 213 aprint_normal("\n"); 214 215 /* Make sure not to use tsleep() if we are cold booting. */ 216 if (cold) 217 sc->sc_bus->use_polling++; 218 219 ue = usb_alloc_event(); 220 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 221 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 222 223 #ifdef USB_USE_SOFTINTR 224 /* XXX we should have our own level */ 225 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 226 sc->sc_bus->methods->soft_intr, sc->sc_bus); 227 if (sc->sc_bus->soft == NULL) { 228 aprint_error("%s: can't register softintr\n", USBDEVNAME(sc->sc_dev)); 229 sc->sc_dying = 1; 230 USB_ATTACH_ERROR_RETURN; 231 } 232 #endif 233 234 err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, speed, 0, 235 &sc->sc_port); 236 if (!err) { 237 dev = sc->sc_port.device; 238 if (dev->hub == NULL) { 239 sc->sc_dying = 1; 240 aprint_error("%s: root device is not a hub\n", 241 USBDEVNAME(sc->sc_dev)); 242 USB_ATTACH_ERROR_RETURN; 243 } 244 sc->sc_bus->root_hub = dev; 245 #if 1 246 /* 247 * Turning this code off will delay attachment of USB devices 248 * until the USB event thread is running, which means that 249 * the keyboard will not work until after cold boot. 250 */ 251 if (cold && (device_cfdata(&sc->sc_dev)->cf_flags & 1)) 252 dev->hub->explore(sc->sc_bus->root_hub); 253 #endif 254 } else { 255 aprint_error("%s: root hub problem, error=%d\n", 256 USBDEVNAME(sc->sc_dev), err); 257 sc->sc_dying = 1; 258 } 259 if (cold) 260 sc->sc_bus->use_polling--; 261 262 config_pending_incr(); 263 usb_kthread_create(usb_create_event_thread, sc); 264 265 if (!pmf_device_register(self, NULL, NULL)) 266 aprint_error_dev(self, "couldn't establish power handler\n"); 267 268 USB_ATTACH_SUCCESS_RETURN; 269 } 270 271 static const char *taskq_names[] = USB_TASKQ_NAMES; 272 273 #if defined(__NetBSD__) || defined(__OpenBSD__) 274 void 275 usb_create_event_thread(void *arg) 276 { 277 struct usb_softc *sc = arg; 278 struct usb_taskq *taskq; 279 int i; 280 281 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_event_thread, sc, 282 &sc->sc_event_thread, "%s", sc->sc_dev.dv_xname)) { 283 printf("%s: unable to create event thread for\n", 284 sc->sc_dev.dv_xname); 285 panic("usb_create_event_thread"); 286 } 287 for (i = 0; i < USB_NUM_TASKQS; i++) { 288 taskq = &usb_taskq[i]; 289 290 if (taskq->taskcreated) 291 continue; 292 293 TAILQ_INIT(&taskq->tasks); 294 taskq->taskcreated = 1; 295 taskq->name = taskq_names[i]; 296 if (usb_kthread_create1(PRI_NONE, 0, NULL, usb_task_thread, 297 taskq, &taskq->task_thread_lwp, taskq->name)) { 298 printf("unable to create task thread: %s\n", taskq->name); 299 panic("usb_create_event_thread task"); 300 } 301 } 302 } 303 304 /* 305 * Add a task to be performed by the task thread. This function can be 306 * called from any context and the task will be executed in a process 307 * context ASAP. 308 */ 309 void 310 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 311 { 312 struct usb_taskq *taskq; 313 int s; 314 315 taskq = &usb_taskq[queue]; 316 s = splusb(); 317 if (task->queue == -1) { 318 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 319 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 320 task->queue = queue; 321 } else { 322 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 323 } 324 wakeup(&taskq->tasks); 325 splx(s); 326 } 327 328 void 329 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 330 { 331 struct usb_taskq *taskq; 332 int s; 333 334 taskq = &usb_taskq[task->queue]; 335 s = splusb(); 336 if (task->queue != -1) { 337 TAILQ_REMOVE(&taskq->tasks, task, next); 338 task->queue = -1; 339 } 340 splx(s); 341 } 342 343 void 344 usb_event_thread(void *arg) 345 { 346 struct usb_softc *sc = arg; 347 348 DPRINTF(("usb_event_thread: start\n")); 349 350 /* 351 * In case this controller is a companion controller to an 352 * EHCI controller we need to wait until the EHCI controller 353 * has grabbed the port. 354 * XXX It would be nicer to do this with a tsleep(), but I don't 355 * know how to synchronize the creation of the threads so it 356 * will work. 357 */ 358 usb_delay_ms(sc->sc_bus, 500); 359 360 /* Make sure first discover does something. */ 361 sc->sc_bus->needs_explore = 1; 362 usb_discover(sc); 363 config_pending_decr(); 364 365 while (!sc->sc_dying) { 366 #ifdef USB_DEBUG 367 if (usb_noexplore < 2) 368 #endif 369 usb_discover(sc); 370 #ifdef USB_DEBUG 371 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 372 usb_noexplore ? 0 : hz * 60); 373 #else 374 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", 375 hz * 60); 376 #endif 377 DPRINTFN(2,("usb_event_thread: woke up\n")); 378 } 379 sc->sc_event_thread = NULL; 380 381 /* In case parent is waiting for us to exit. */ 382 wakeup(sc); 383 384 DPRINTF(("usb_event_thread: exit\n")); 385 kthread_exit(0); 386 } 387 388 void 389 usb_task_thread(void *arg) 390 { 391 struct usb_task *task; 392 struct usb_taskq *taskq; 393 int s; 394 395 taskq = arg; 396 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 397 398 s = splusb(); 399 for (;;) { 400 task = TAILQ_FIRST(&taskq->tasks); 401 if (task == NULL) { 402 tsleep(&taskq->tasks, PWAIT, "usbtsk", 0); 403 task = TAILQ_FIRST(&taskq->tasks); 404 } 405 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 406 if (task != NULL) { 407 TAILQ_REMOVE(&taskq->tasks, task, next); 408 task->queue = -1; 409 splx(s); 410 task->fun(task->arg); 411 s = splusb(); 412 } 413 } 414 } 415 416 int 417 usbctlprint(void *aux, const char *pnp) 418 { 419 /* only "usb"es can attach to host controllers */ 420 if (pnp) 421 aprint_normal("usb at %s", pnp); 422 423 return (UNCONF); 424 } 425 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 426 427 int 428 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 429 { 430 int unit = minor(dev); 431 struct usb_softc *sc; 432 433 if (unit == USB_DEV_MINOR) { 434 if (usb_dev_open) 435 return (EBUSY); 436 usb_dev_open = 1; 437 usb_async_proc = 0; 438 return (0); 439 } 440 441 USB_GET_SC_OPEN(usb, unit, sc); 442 443 if (sc->sc_dying) 444 return (EIO); 445 446 return (0); 447 } 448 449 int 450 usbread(dev_t dev, struct uio *uio, int flag) 451 { 452 struct usb_event *ue; 453 #ifdef COMPAT_30 454 struct usb_event_old *ueo = NULL; /* XXXGCC */ 455 #endif 456 int s, error, n, useold; 457 458 if (minor(dev) != USB_DEV_MINOR) 459 return (ENXIO); 460 461 useold = 0; 462 switch (uio->uio_resid) { 463 #ifdef COMPAT_30 464 case sizeof(struct usb_event_old): 465 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 466 M_WAITOK|M_ZERO); 467 useold = 1; 468 /* FALLTHRU */ 469 #endif 470 case sizeof(struct usb_event): 471 ue = usb_alloc_event(); 472 break; 473 default: 474 return (EINVAL); 475 } 476 477 error = 0; 478 s = splusb(); 479 for (;;) { 480 n = usb_get_next_event(ue); 481 if (n != 0) 482 break; 483 if (flag & IO_NDELAY) { 484 error = EWOULDBLOCK; 485 break; 486 } 487 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 488 if (error) 489 break; 490 } 491 splx(s); 492 if (!error) { 493 #ifdef COMPAT_30 494 if (useold) { /* copy fields to old struct */ 495 ueo->ue_type = ue->ue_type; 496 memcpy(&ueo->ue_time, &ue->ue_time, 497 sizeof(struct timespec)); 498 switch (ue->ue_type) { 499 case USB_EVENT_DEVICE_ATTACH: 500 case USB_EVENT_DEVICE_DETACH: 501 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 502 break; 503 504 case USB_EVENT_CTRLR_ATTACH: 505 case USB_EVENT_CTRLR_DETACH: 506 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 507 break; 508 509 case USB_EVENT_DRIVER_ATTACH: 510 case USB_EVENT_DRIVER_DETACH: 511 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 512 memcpy(ueo->u.ue_driver.ue_devname, 513 ue->u.ue_driver.ue_devname, 514 sizeof(ue->u.ue_driver.ue_devname)); 515 break; 516 default: 517 ; 518 } 519 520 error = uiomove((void *)ueo, uio->uio_resid, uio); 521 } else 522 #endif 523 error = uiomove((void *)ue, uio->uio_resid, uio); 524 } 525 usb_free_event(ue); 526 #ifdef COMPAT_30 527 if (useold) 528 free(ueo, M_USBDEV); 529 #endif 530 531 return (error); 532 } 533 534 int 535 usbclose(dev_t dev, int flag, int mode, 536 struct lwp *l) 537 { 538 int unit = minor(dev); 539 540 if (unit == USB_DEV_MINOR) { 541 usb_async_proc = 0; 542 usb_dev_open = 0; 543 } 544 545 return (0); 546 } 547 548 int 549 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 550 { 551 struct usb_softc *sc; 552 int unit = minor(devt); 553 554 if (unit == USB_DEV_MINOR) { 555 switch (cmd) { 556 case FIONBIO: 557 /* All handled in the upper FS layer. */ 558 return (0); 559 560 case FIOASYNC: 561 if (*(int *)data) 562 usb_async_proc = l->l_proc; 563 else 564 usb_async_proc = 0; 565 return (0); 566 567 default: 568 return (EINVAL); 569 } 570 } 571 572 USB_GET_SC(usb, unit, sc); 573 574 if (sc->sc_dying) 575 return (EIO); 576 577 switch (cmd) { 578 #ifdef USB_DEBUG 579 case USB_SETDEBUG: 580 if (!(flag & FWRITE)) 581 return (EBADF); 582 usbdebug = ((*(int *)data) & 0x000000ff); 583 #if defined(UHCI_DEBUG) && NUHCI > 0 584 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 585 #endif 586 #if defined(OHCI_DEBUG) && NOHCI > 0 587 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 588 #endif 589 break; 590 #endif /* USB_DEBUG */ 591 case USB_REQUEST: 592 { 593 struct usb_ctl_request *ur = (void *)data; 594 int len = UGETW(ur->ucr_request.wLength); 595 struct iovec iov; 596 struct uio uio; 597 void *ptr = 0; 598 int addr = ur->ucr_addr; 599 usbd_status err; 600 int error = 0; 601 602 if (!(flag & FWRITE)) 603 return (EBADF); 604 605 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 606 if (len < 0 || len > 32768) 607 return (EINVAL); 608 if (addr < 0 || addr >= USB_MAX_DEVICES || 609 sc->sc_bus->devices[addr] == 0) 610 return (EINVAL); 611 if (len != 0) { 612 iov.iov_base = (void *)ur->ucr_data; 613 iov.iov_len = len; 614 uio.uio_iov = &iov; 615 uio.uio_iovcnt = 1; 616 uio.uio_resid = len; 617 uio.uio_offset = 0; 618 uio.uio_rw = 619 ur->ucr_request.bmRequestType & UT_READ ? 620 UIO_READ : UIO_WRITE; 621 uio.uio_vmspace = l->l_proc->p_vmspace; 622 ptr = malloc(len, M_TEMP, M_WAITOK); 623 if (uio.uio_rw == UIO_WRITE) { 624 error = uiomove(ptr, len, &uio); 625 if (error) 626 goto ret; 627 } 628 } 629 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 630 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 631 USBD_DEFAULT_TIMEOUT); 632 if (err) { 633 error = EIO; 634 goto ret; 635 } 636 if (len != 0) { 637 if (uio.uio_rw == UIO_READ) { 638 error = uiomove(ptr, len, &uio); 639 if (error) 640 goto ret; 641 } 642 } 643 ret: 644 if (ptr) 645 free(ptr, M_TEMP); 646 return (error); 647 } 648 649 case USB_DEVICEINFO: 650 { 651 usbd_device_handle dev; 652 struct usb_device_info *di = (void *)data; 653 int addr = di->udi_addr; 654 655 if (addr < 1 || addr >= USB_MAX_DEVICES) 656 return EINVAL; 657 if ((dev = sc->sc_bus->devices[addr]) == NULL) 658 return ENXIO; 659 usbd_fill_deviceinfo(dev, di, 1); 660 break; 661 } 662 663 #ifdef COMPAT_30 664 case USB_DEVICEINFO_OLD: 665 { 666 usbd_device_handle dev; 667 struct usb_device_info_old *di = (void *)data; 668 int addr = di->udi_addr; 669 670 if (addr < 1 || addr >= USB_MAX_DEVICES) 671 return EINVAL; 672 if ((dev = sc->sc_bus->devices[addr]) == NULL) 673 return ENXIO; 674 usbd_fill_deviceinfo_old(dev, di, 1); 675 break; 676 } 677 #endif 678 679 case USB_DEVICESTATS: 680 *(struct usb_device_stats *)data = sc->sc_bus->stats; 681 break; 682 683 default: 684 return (EINVAL); 685 } 686 return (0); 687 } 688 689 int 690 usbpoll(dev_t dev, int events, struct lwp *l) 691 { 692 int revents, mask, s; 693 694 if (minor(dev) == USB_DEV_MINOR) { 695 revents = 0; 696 mask = POLLIN | POLLRDNORM; 697 698 s = splusb(); 699 if (events & mask && usb_nevents > 0) 700 revents |= events & mask; 701 if (revents == 0 && events & mask) 702 selrecord(l, &usb_selevent); 703 splx(s); 704 705 return (revents); 706 } else { 707 return (0); 708 } 709 } 710 711 static void 712 filt_usbrdetach(struct knote *kn) 713 { 714 int s; 715 716 s = splusb(); 717 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 718 splx(s); 719 } 720 721 static int 722 filt_usbread(struct knote *kn, long hint) 723 { 724 725 if (usb_nevents == 0) 726 return (0); 727 728 kn->kn_data = sizeof(struct usb_event); 729 return (1); 730 } 731 732 static const struct filterops usbread_filtops = 733 { 1, NULL, filt_usbrdetach, filt_usbread }; 734 735 int 736 usbkqfilter(dev_t dev, struct knote *kn) 737 { 738 struct klist *klist; 739 int s; 740 741 switch (kn->kn_filter) { 742 case EVFILT_READ: 743 if (minor(dev) != USB_DEV_MINOR) 744 return (1); 745 klist = &usb_selevent.sel_klist; 746 kn->kn_fop = &usbread_filtops; 747 break; 748 749 default: 750 return (EINVAL); 751 } 752 753 kn->kn_hook = NULL; 754 755 s = splusb(); 756 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 757 splx(s); 758 759 return (0); 760 } 761 762 /* Explore device tree from the root. */ 763 Static void 764 usb_discover(void *v) 765 { 766 struct usb_softc *sc = v; 767 768 DPRINTFN(2,("usb_discover\n")); 769 #ifdef USB_DEBUG 770 if (usb_noexplore > 1) 771 return; 772 #endif 773 /* 774 * We need mutual exclusion while traversing the device tree, 775 * but this is guaranteed since this function is only called 776 * from the event thread for the controller. 777 */ 778 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 779 sc->sc_bus->needs_explore = 0; 780 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 781 } 782 } 783 784 void 785 usb_needs_explore(usbd_device_handle dev) 786 { 787 DPRINTFN(2,("usb_needs_explore\n")); 788 dev->bus->needs_explore = 1; 789 wakeup(&dev->bus->needs_explore); 790 } 791 792 void 793 usb_needs_reattach(usbd_device_handle dev) 794 { 795 DPRINTFN(2,("usb_needs_reattach\n")); 796 dev->powersrc->reattach = 1; 797 dev->bus->needs_explore = 1; 798 wakeup(&dev->bus->needs_explore); 799 } 800 801 /* Called at splusb() */ 802 int 803 usb_get_next_event(struct usb_event *ue) 804 { 805 struct usb_event_q *ueq; 806 807 if (usb_nevents <= 0) 808 return (0); 809 ueq = SIMPLEQ_FIRST(&usb_events); 810 #ifdef DIAGNOSTIC 811 if (ueq == NULL) { 812 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 813 usb_nevents = 0; 814 return (0); 815 } 816 #endif 817 if (ue) 818 *ue = ueq->ue; 819 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 820 usb_free_event((struct usb_event *)(void *)ueq); 821 usb_nevents--; 822 return (1); 823 } 824 825 void 826 usbd_add_dev_event(int type, usbd_device_handle udev) 827 { 828 struct usb_event *ue = usb_alloc_event(); 829 830 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 831 usb_add_event(type, ue); 832 } 833 834 void 835 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 836 { 837 struct usb_event *ue = usb_alloc_event(); 838 839 ue->u.ue_driver.ue_cookie = udev->cookie; 840 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 841 sizeof ue->u.ue_driver.ue_devname); 842 usb_add_event(type, ue); 843 } 844 845 Static struct usb_event * 846 usb_alloc_event(void) 847 { 848 /* Yes, this is right; we allocate enough so that we can use it later */ 849 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 850 } 851 852 Static void 853 usb_free_event(struct usb_event *uep) 854 { 855 free(uep, M_USBDEV); 856 } 857 858 Static void 859 usb_add_event(int type, struct usb_event *uep) 860 { 861 struct usb_event_q *ueq; 862 struct timeval thetime; 863 int s; 864 865 microtime(&thetime); 866 /* Don't want to wait here inside splusb() */ 867 ueq = (struct usb_event_q *)(void *)uep; 868 ueq->ue = *uep; 869 ueq->ue.ue_type = type; 870 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 871 872 s = splusb(); 873 if (++usb_nevents >= USB_MAX_EVENTS) { 874 /* Too many queued events, drop an old one. */ 875 DPRINTFN(-1,("usb: event dropped\n")); 876 (void)usb_get_next_event(0); 877 } 878 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 879 wakeup(&usb_events); 880 selnotify(&usb_selevent, 0, 0); 881 if (usb_async_proc != NULL) { 882 mutex_enter(&proclist_mutex); 883 psignal(usb_async_proc, SIGIO); 884 mutex_exit(&proclist_mutex); 885 } 886 splx(s); 887 } 888 889 void 890 usb_schedsoftintr(usbd_bus_handle bus) 891 { 892 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 893 #ifdef USB_USE_SOFTINTR 894 if (bus->use_polling) { 895 bus->methods->soft_intr(bus); 896 } else { 897 softint_schedule(bus->soft); 898 } 899 #else 900 bus->methods->soft_intr(bus); 901 #endif /* USB_USE_SOFTINTR */ 902 } 903 904 int 905 usb_activate(device_t self, enum devact act) 906 { 907 struct usb_softc *sc = device_private(self); 908 usbd_device_handle dev = sc->sc_port.device; 909 int i, rv = 0; 910 911 switch (act) { 912 case DVACT_ACTIVATE: 913 return (EOPNOTSUPP); 914 915 case DVACT_DEACTIVATE: 916 sc->sc_dying = 1; 917 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 918 for (i = 0; dev->subdevs[i]; i++) 919 rv |= config_deactivate(dev->subdevs[i]); 920 } 921 break; 922 } 923 return (rv); 924 } 925 926 void 927 usb_childdet(device_t self, device_t child) 928 { 929 int i, last = -1; 930 struct usb_softc *sc = device_private(self); 931 struct usbd_device *dev; 932 933 if ((dev = sc->sc_port.device) == NULL || dev->subdevs == NULL) 934 return; 935 936 for (i = 0; dev->subdevs[i] != NULL; i++) 937 last = i; 938 939 for (i = 0; dev->subdevs[i] != NULL; i++) { 940 if (dev->subdevs[i] == child) { 941 dev->subdevs[i] = dev->subdevs[last]; 942 dev->subdevs[last] = NULL; 943 } 944 } 945 } 946 947 int 948 usb_detach(device_t self, int flags) 949 { 950 struct usb_softc *sc = device_private(self); 951 struct usb_event *ue; 952 953 DPRINTF(("usb_detach: start\n")); 954 955 pmf_device_deregister(self); 956 /* Kill off event thread. */ 957 while (sc->sc_event_thread != NULL) { 958 wakeup(&sc->sc_bus->needs_explore); 959 tsleep(sc, PWAIT, "usbdet", hz * 60); 960 } 961 DPRINTF(("usb_detach: event thread dead\n")); 962 963 /* Make all devices disconnect. */ 964 if (sc->sc_port.device != NULL) 965 usb_disconnect_port(&sc->sc_port, self); 966 967 #ifdef USB_USE_SOFTINTR 968 if (sc->sc_bus->soft != NULL) { 969 softint_disestablish(sc->sc_bus->soft); 970 sc->sc_bus->soft = NULL; 971 } 972 #endif 973 974 ue = usb_alloc_event(); 975 ue->u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); 976 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 977 978 return (0); 979 } 980 981 #ifdef COMPAT_30 982 Static void 983 usb_copy_old_devinfo(struct usb_device_info_old *uo, 984 const struct usb_device_info *ue) 985 { 986 const unsigned char *p; 987 unsigned char *q; 988 int i, n; 989 990 uo->udi_bus = ue->udi_bus; 991 uo->udi_addr = ue->udi_addr; 992 uo->udi_cookie = ue->udi_cookie; 993 for (i = 0, p = (const unsigned char *)ue->udi_product, 994 q = (unsigned char *)uo->udi_product; 995 *p && i < USB_MAX_STRING_LEN - 1; p++) { 996 if (*p < 0x80) 997 q[i++] = *p; 998 else { 999 q[i++] = '?'; 1000 if ((*p & 0xe0) == 0xe0) 1001 p++; 1002 p++; 1003 } 1004 } 1005 q[i] = 0; 1006 1007 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1008 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1009 if (* p < 0x80) 1010 q[i++] = *p; 1011 else { 1012 q[i++] = '?'; 1013 p++; 1014 if ((*p & 0xe0) == 0xe0) 1015 p++; 1016 } 1017 } 1018 q[i] = 0; 1019 1020 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1021 1022 uo->udi_productNo = ue->udi_productNo; 1023 uo->udi_vendorNo = ue->udi_vendorNo; 1024 uo->udi_releaseNo = ue->udi_releaseNo; 1025 uo->udi_class = ue->udi_class; 1026 uo->udi_subclass = ue->udi_subclass; 1027 uo->udi_protocol = ue->udi_protocol; 1028 uo->udi_config = ue->udi_config; 1029 uo->udi_speed = ue->udi_speed; 1030 uo->udi_power = ue->udi_power; 1031 uo->udi_nports = ue->udi_nports; 1032 1033 for (n=0; n<USB_MAX_DEVNAMES; n++) 1034 memcpy(uo->udi_devnames[n], 1035 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1036 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1037 } 1038 #endif 1039
Indexes created Wed Sep 24 05:09:52 GMT 2025