usb.c revision 1.111
1 /* $NetBSD: usb.c,v 1.111 2008/04/03 14:07:01 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart (at) augustsson.net) at 9 * Carlstedt Research & Technology. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * USB specifications and other documentation can be found at 42 * http://www.usb.org/developers/docs/ and 43 * http://www.usb.org/developers/devclass_docs/ 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: usb.c,v 1.111 2008/04/03 14:07:01 drochner Exp $"); 48 49 #include "opt_compat_netbsd.h" 50 51 #include "ohci.h" 52 #include "uhci.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/malloc.h> 58 #include <sys/device.h> 59 #include <sys/kthread.h> 60 #include <sys/proc.h> 61 #include <sys/conf.h> 62 #include <sys/fcntl.h> 63 #include <sys/poll.h> 64 #include <sys/select.h> 65 #include <sys/vnode.h> 66 #include <sys/signalvar.h> 67 #include <sys/intr.h> 68 69 #include <dev/usb/usb.h> 70 #include <dev/usb/usbdi.h> 71 #include <dev/usb/usbdi_util.h> 72 73 #define USB_DEV_MINOR 255 74 75 #include <sys/bus.h> 76 77 #include <dev/usb/usbdivar.h> 78 #include <dev/usb/usb_quirks.h> 79 80 #ifdef USB_DEBUG 81 #define DPRINTF(x) if (usbdebug) logprintf x 82 #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x 83 int usbdebug = 0; 84 #if defined(UHCI_DEBUG) && NUHCI > 0 85 extern int uhcidebug; 86 #endif 87 #if defined(OHCI_DEBUG) && NOHCI > 0 88 extern int ohcidebug; 89 #endif 90 /* 91 * 0 - do usual exploration 92 * 1 - do not use timeout exploration 93 * >1 - do no exploration 94 */ 95 int usb_noexplore = 0; 96 #else 97 #define DPRINTF(x) 98 #define DPRINTFN(n,x) 99 #endif 100 101 struct usb_softc { 102 #if 0 103 USBBASEDEVICE sc_dev; /* base device */ 104 #endif 105 usbd_bus_handle sc_bus; /* USB controller */ 106 struct usbd_port sc_port; /* dummy port for root hub */ 107 108 struct lwp *sc_event_thread; 109 110 char sc_dying; 111 }; 112 113 struct usb_taskq { 114 TAILQ_HEAD(, usb_task) tasks; 115 struct lwp *task_thread_lwp; 116 const char *name; 117 int taskcreated; /* task thread exists. */ 118 }; 119 120 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 121 122 dev_type_open(usbopen); 123 dev_type_close(usbclose); 124 dev_type_read(usbread); 125 dev_type_ioctl(usbioctl); 126 dev_type_poll(usbpoll); 127 dev_type_kqfilter(usbkqfilter); 128 129 const struct cdevsw usb_cdevsw = { 130 usbopen, usbclose, usbread, nowrite, usbioctl, 131 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 132 }; 133 134 Static void usb_discover(struct usb_softc *); 135 Static void usb_create_event_thread(device_t); 136 Static void usb_event_thread(void *); 137 Static void usb_task_thread(void *); 138 139 #define USB_MAX_EVENTS 100 140 struct usb_event_q { 141 struct usb_event ue; 142 SIMPLEQ_ENTRY(usb_event_q) next; 143 }; 144 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 145 SIMPLEQ_HEAD_INITIALIZER(usb_events); 146 Static int usb_nevents = 0; 147 Static struct selinfo usb_selevent; 148 Static usb_proc_ptr usb_async_proc; /* process that wants USB SIGIO */ 149 Static int usb_dev_open = 0; 150 Static struct usb_event *usb_alloc_event(void); 151 Static void usb_free_event(struct usb_event *); 152 Static void usb_add_event(int, struct usb_event *); 153 154 Static int usb_get_next_event(struct usb_event *); 155 156 #ifdef COMPAT_30 157 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 158 #endif 159 160 Static const char *usbrev_str[] = USBREV_STR; 161 162 static int usb_match(device_t, struct cfdata *, void *); 163 static void usb_attach(device_t, device_t, void *); 164 static int usb_detach(device_t, int); 165 static int usb_activate(device_t, enum devact); 166 static void usb_childdet(device_t, device_t); 167 static void usb_doattach(device_t); 168 169 extern struct cfdriver usb_cd; 170 171 CFATTACH_DECL2_NEW(usb, sizeof(struct usb_softc), 172 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet); 173 174 USB_MATCH(usb) 175 { 176 DPRINTF(("usbd_match\n")); 177 return (UMATCH_GENERIC); 178 } 179 180 USB_ATTACH(usb) 181 { 182 struct usb_softc *sc = device_private(self); 183 int usbrev; 184 185 sc->sc_bus = aux; 186 usbrev = sc->sc_bus->usbrev; 187 188 aprint_naive("\n"); 189 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 190 switch (usbrev) { 191 case USBREV_1_0: 192 case USBREV_1_1: 193 case USBREV_2_0: 194 break; 195 default: 196 aprint_error(", not supported\n"); 197 sc->sc_dying = 1; 198 USB_ATTACH_ERROR_RETURN; 199 } 200 aprint_normal("\n"); 201 202 config_interrupts(self, usb_doattach); 203 } 204 205 static void 206 usb_doattach(device_t self) 207 { 208 static bool usb_selevent_init; /* XXX */ 209 struct usb_softc *sc = device_private(self); 210 usbd_device_handle dev; 211 usbd_status err; 212 int speed; 213 struct usb_event *ue; 214 215 if (!usb_selevent_init) { 216 selinit(&usb_selevent); 217 usb_selevent_init = true; 218 } 219 DPRINTF(("usbd_doattach\n")); 220 221 sc->sc_bus->usbctl = self; 222 sc->sc_port.power = USB_MAX_POWER; 223 224 switch (sc->sc_bus->usbrev) { 225 case USBREV_1_0: 226 case USBREV_1_1: 227 speed = USB_SPEED_FULL; 228 break; 229 case USBREV_2_0: 230 speed = USB_SPEED_HIGH; 231 break; 232 default: 233 panic("usb_doattach"); 234 } 235 236 ue = usb_alloc_event(); 237 ue->u.ue_ctrlr.ue_bus = device_unit(self); 238 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 239 240 #ifdef USB_USE_SOFTINTR 241 /* XXX we should have our own level */ 242 sc->sc_bus->soft = softint_establish(SOFTINT_NET, 243 sc->sc_bus->methods->soft_intr, sc->sc_bus); 244 if (sc->sc_bus->soft == NULL) { 245 aprint_error("%s: can't register softintr\n", 246 device_xname(self)); 247 sc->sc_dying = 1; 248 USB_ATTACH_ERROR_RETURN; 249 } 250 #endif 251 252 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 253 &sc->sc_port); 254 if (!err) { 255 dev = sc->sc_port.device; 256 if (dev->hub == NULL) { 257 sc->sc_dying = 1; 258 aprint_error("%s: root device is not a hub\n", 259 device_xname(self)); 260 USB_ATTACH_ERROR_RETURN; 261 } 262 sc->sc_bus->root_hub = dev; 263 #if 1 264 /* 265 * Turning this code off will delay attachment of USB devices 266 * until the USB event thread is running, which means that 267 * the keyboard will not work until after cold boot. 268 */ 269 if (cold && (device_cfdata(self)->cf_flags & 1)) 270 dev->hub->explore(sc->sc_bus->root_hub); 271 #endif 272 } else { 273 aprint_error("%s: root hub problem, error=%d\n", 274 device_xname(self), err); 275 sc->sc_dying = 1; 276 } 277 278 config_pending_incr(); 279 usb_create_event_thread(self); 280 281 if (!pmf_device_register(self, NULL, NULL)) 282 aprint_error_dev(self, "couldn't establish power handler\n"); 283 284 USB_ATTACH_SUCCESS_RETURN; 285 } 286 287 static const char *taskq_names[] = USB_TASKQ_NAMES; 288 289 #if defined(__NetBSD__) || defined(__OpenBSD__) 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 #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ 442 443 int 444 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 445 { 446 int unit = minor(dev); 447 struct usb_softc *sc; 448 449 if (unit == USB_DEV_MINOR) { 450 if (usb_dev_open) 451 return (EBUSY); 452 usb_dev_open = 1; 453 usb_async_proc = 0; 454 return (0); 455 } 456 457 sc = device_lookup_private(&usb_cd, unit); 458 if (!sc) 459 return (ENXIO); 460 461 if (sc->sc_dying) 462 return (EIO); 463 464 return (0); 465 } 466 467 int 468 usbread(dev_t dev, struct uio *uio, int flag) 469 { 470 struct usb_event *ue; 471 #ifdef COMPAT_30 472 struct usb_event_old *ueo = NULL; /* XXXGCC */ 473 #endif 474 int s, error, n, useold; 475 476 if (minor(dev) != USB_DEV_MINOR) 477 return (ENXIO); 478 479 useold = 0; 480 switch (uio->uio_resid) { 481 #ifdef COMPAT_30 482 case sizeof(struct usb_event_old): 483 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 484 M_WAITOK|M_ZERO); 485 useold = 1; 486 /* FALLTHRU */ 487 #endif 488 case sizeof(struct usb_event): 489 ue = usb_alloc_event(); 490 break; 491 default: 492 return (EINVAL); 493 } 494 495 error = 0; 496 s = splusb(); 497 for (;;) { 498 n = usb_get_next_event(ue); 499 if (n != 0) 500 break; 501 if (flag & IO_NDELAY) { 502 error = EWOULDBLOCK; 503 break; 504 } 505 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 506 if (error) 507 break; 508 } 509 splx(s); 510 if (!error) { 511 #ifdef COMPAT_30 512 if (useold) { /* copy fields to old struct */ 513 ueo->ue_type = ue->ue_type; 514 memcpy(&ueo->ue_time, &ue->ue_time, 515 sizeof(struct timespec)); 516 switch (ue->ue_type) { 517 case USB_EVENT_DEVICE_ATTACH: 518 case USB_EVENT_DEVICE_DETACH: 519 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 520 break; 521 522 case USB_EVENT_CTRLR_ATTACH: 523 case USB_EVENT_CTRLR_DETACH: 524 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 525 break; 526 527 case USB_EVENT_DRIVER_ATTACH: 528 case USB_EVENT_DRIVER_DETACH: 529 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 530 memcpy(ueo->u.ue_driver.ue_devname, 531 ue->u.ue_driver.ue_devname, 532 sizeof(ue->u.ue_driver.ue_devname)); 533 break; 534 default: 535 ; 536 } 537 538 error = uiomove((void *)ueo, sizeof *ueo, uio); 539 } else 540 #endif 541 error = uiomove((void *)ue, sizeof *ue, uio); 542 } 543 usb_free_event(ue); 544 #ifdef COMPAT_30 545 if (useold) 546 free(ueo, M_USBDEV); 547 #endif 548 549 return (error); 550 } 551 552 int 553 usbclose(dev_t dev, int flag, int mode, 554 struct lwp *l) 555 { 556 int unit = minor(dev); 557 558 if (unit == USB_DEV_MINOR) { 559 usb_async_proc = 0; 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 if (*(int *)data) 580 usb_async_proc = l->l_proc; 581 else 582 usb_async_proc = 0; 583 return (0); 584 585 default: 586 return (EINVAL); 587 } 588 } 589 590 sc = device_lookup_private(&usb_cd, unit); 591 592 if (sc->sc_dying) 593 return (EIO); 594 595 switch (cmd) { 596 #ifdef USB_DEBUG 597 case USB_SETDEBUG: 598 if (!(flag & FWRITE)) 599 return (EBADF); 600 usbdebug = ((*(int *)data) & 0x000000ff); 601 #if defined(UHCI_DEBUG) && NUHCI > 0 602 uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; 603 #endif 604 #if defined(OHCI_DEBUG) && NOHCI > 0 605 ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; 606 #endif 607 break; 608 #endif /* USB_DEBUG */ 609 case USB_REQUEST: 610 { 611 struct usb_ctl_request *ur = (void *)data; 612 int len = UGETW(ur->ucr_request.wLength); 613 struct iovec iov; 614 struct uio uio; 615 void *ptr = 0; 616 int addr = ur->ucr_addr; 617 usbd_status err; 618 int error = 0; 619 620 if (!(flag & FWRITE)) 621 return (EBADF); 622 623 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 624 if (len < 0 || len > 32768) 625 return (EINVAL); 626 if (addr < 0 || addr >= USB_MAX_DEVICES || 627 sc->sc_bus->devices[addr] == 0) 628 return (EINVAL); 629 if (len != 0) { 630 iov.iov_base = (void *)ur->ucr_data; 631 iov.iov_len = len; 632 uio.uio_iov = &iov; 633 uio.uio_iovcnt = 1; 634 uio.uio_resid = len; 635 uio.uio_offset = 0; 636 uio.uio_rw = 637 ur->ucr_request.bmRequestType & UT_READ ? 638 UIO_READ : UIO_WRITE; 639 uio.uio_vmspace = l->l_proc->p_vmspace; 640 ptr = malloc(len, M_TEMP, M_WAITOK); 641 if (uio.uio_rw == UIO_WRITE) { 642 error = uiomove(ptr, len, &uio); 643 if (error) 644 goto ret; 645 } 646 } 647 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 648 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 649 USBD_DEFAULT_TIMEOUT); 650 if (err) { 651 error = EIO; 652 goto ret; 653 } 654 if (len > ur->ucr_actlen) 655 len = ur->ucr_actlen; 656 if (len != 0) { 657 if (uio.uio_rw == UIO_READ) { 658 error = uiomove(ptr, len, &uio); 659 if (error) 660 goto ret; 661 } 662 } 663 ret: 664 if (ptr) 665 free(ptr, M_TEMP); 666 return (error); 667 } 668 669 case USB_DEVICEINFO: 670 { 671 usbd_device_handle dev; 672 struct usb_device_info *di = (void *)data; 673 int addr = di->udi_addr; 674 675 if (addr < 1 || addr >= USB_MAX_DEVICES) 676 return EINVAL; 677 if ((dev = sc->sc_bus->devices[addr]) == NULL) 678 return ENXIO; 679 usbd_fill_deviceinfo(dev, di, 1); 680 break; 681 } 682 683 #ifdef COMPAT_30 684 case USB_DEVICEINFO_OLD: 685 { 686 usbd_device_handle dev; 687 struct usb_device_info_old *di = (void *)data; 688 int addr = di->udi_addr; 689 690 if (addr < 1 || addr >= USB_MAX_DEVICES) 691 return EINVAL; 692 if ((dev = sc->sc_bus->devices[addr]) == NULL) 693 return ENXIO; 694 usbd_fill_deviceinfo_old(dev, di, 1); 695 break; 696 } 697 #endif 698 699 case USB_DEVICESTATS: 700 *(struct usb_device_stats *)data = sc->sc_bus->stats; 701 break; 702 703 default: 704 return (EINVAL); 705 } 706 return (0); 707 } 708 709 int 710 usbpoll(dev_t dev, int events, struct lwp *l) 711 { 712 int revents, mask, s; 713 714 if (minor(dev) == USB_DEV_MINOR) { 715 revents = 0; 716 mask = POLLIN | POLLRDNORM; 717 718 s = splusb(); 719 if (events & mask && usb_nevents > 0) 720 revents |= events & mask; 721 if (revents == 0 && events & mask) 722 selrecord(l, &usb_selevent); 723 splx(s); 724 725 return (revents); 726 } else { 727 return (0); 728 } 729 } 730 731 static void 732 filt_usbrdetach(struct knote *kn) 733 { 734 int s; 735 736 s = splusb(); 737 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 738 splx(s); 739 } 740 741 static int 742 filt_usbread(struct knote *kn, long hint) 743 { 744 745 if (usb_nevents == 0) 746 return (0); 747 748 kn->kn_data = sizeof(struct usb_event); 749 return (1); 750 } 751 752 static const struct filterops usbread_filtops = 753 { 1, NULL, filt_usbrdetach, filt_usbread }; 754 755 int 756 usbkqfilter(dev_t dev, struct knote *kn) 757 { 758 struct klist *klist; 759 int s; 760 761 switch (kn->kn_filter) { 762 case EVFILT_READ: 763 if (minor(dev) != USB_DEV_MINOR) 764 return (1); 765 klist = &usb_selevent.sel_klist; 766 kn->kn_fop = &usbread_filtops; 767 break; 768 769 default: 770 return (EINVAL); 771 } 772 773 kn->kn_hook = NULL; 774 775 s = splusb(); 776 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 777 splx(s); 778 779 return (0); 780 } 781 782 /* Explore device tree from the root. */ 783 Static void 784 usb_discover(struct usb_softc *sc) 785 { 786 787 DPRINTFN(2,("usb_discover\n")); 788 #ifdef USB_DEBUG 789 if (usb_noexplore > 1) 790 return; 791 #endif 792 /* 793 * We need mutual exclusion while traversing the device tree, 794 * but this is guaranteed since this function is only called 795 * from the event thread for the controller. 796 */ 797 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 798 sc->sc_bus->needs_explore = 0; 799 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 800 } 801 } 802 803 void 804 usb_needs_explore(usbd_device_handle dev) 805 { 806 DPRINTFN(2,("usb_needs_explore\n")); 807 dev->bus->needs_explore = 1; 808 wakeup(&dev->bus->needs_explore); 809 } 810 811 void 812 usb_needs_reattach(usbd_device_handle dev) 813 { 814 DPRINTFN(2,("usb_needs_reattach\n")); 815 dev->powersrc->reattach = 1; 816 dev->bus->needs_explore = 1; 817 wakeup(&dev->bus->needs_explore); 818 } 819 820 /* Called at splusb() */ 821 int 822 usb_get_next_event(struct usb_event *ue) 823 { 824 struct usb_event_q *ueq; 825 826 if (usb_nevents <= 0) 827 return (0); 828 ueq = SIMPLEQ_FIRST(&usb_events); 829 #ifdef DIAGNOSTIC 830 if (ueq == NULL) { 831 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 832 usb_nevents = 0; 833 return (0); 834 } 835 #endif 836 if (ue) 837 *ue = ueq->ue; 838 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 839 usb_free_event((struct usb_event *)(void *)ueq); 840 usb_nevents--; 841 return (1); 842 } 843 844 void 845 usbd_add_dev_event(int type, usbd_device_handle udev) 846 { 847 struct usb_event *ue = usb_alloc_event(); 848 849 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 850 usb_add_event(type, ue); 851 } 852 853 void 854 usbd_add_drv_event(int type, usbd_device_handle udev, device_ptr_t dev) 855 { 856 struct usb_event *ue = usb_alloc_event(); 857 858 ue->u.ue_driver.ue_cookie = udev->cookie; 859 strncpy(ue->u.ue_driver.ue_devname, USBDEVPTRNAME(dev), 860 sizeof ue->u.ue_driver.ue_devname); 861 usb_add_event(type, ue); 862 } 863 864 Static struct usb_event * 865 usb_alloc_event(void) 866 { 867 /* Yes, this is right; we allocate enough so that we can use it later */ 868 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 869 } 870 871 Static void 872 usb_free_event(struct usb_event *uep) 873 { 874 free(uep, M_USBDEV); 875 } 876 877 Static void 878 usb_add_event(int type, struct usb_event *uep) 879 { 880 struct usb_event_q *ueq; 881 struct timeval thetime; 882 int s; 883 884 microtime(&thetime); 885 /* Don't want to wait here inside splusb() */ 886 ueq = (struct usb_event_q *)(void *)uep; 887 ueq->ue = *uep; 888 ueq->ue.ue_type = type; 889 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 890 891 s = splusb(); 892 if (++usb_nevents >= USB_MAX_EVENTS) { 893 /* Too many queued events, drop an old one. */ 894 DPRINTFN(-1,("usb: event dropped\n")); 895 (void)usb_get_next_event(0); 896 } 897 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 898 wakeup(&usb_events); 899 selnotify(&usb_selevent, 0, 0); 900 if (usb_async_proc != NULL) { 901 mutex_enter(&proclist_mutex); 902 psignal(usb_async_proc, SIGIO); 903 mutex_exit(&proclist_mutex); 904 } 905 splx(s); 906 } 907 908 void 909 usb_schedsoftintr(usbd_bus_handle bus) 910 { 911 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 912 #ifdef USB_USE_SOFTINTR 913 if (bus->use_polling) { 914 bus->methods->soft_intr(bus); 915 } else { 916 softint_schedule(bus->soft); 917 } 918 #else 919 bus->methods->soft_intr(bus); 920 #endif /* USB_USE_SOFTINTR */ 921 } 922 923 int 924 usb_activate(device_t self, enum devact act) 925 { 926 struct usb_softc *sc = device_private(self); 927 usbd_device_handle dev = sc->sc_port.device; 928 int i, rv = 0; 929 930 switch (act) { 931 case DVACT_ACTIVATE: 932 return (EOPNOTSUPP); 933 934 case DVACT_DEACTIVATE: 935 sc->sc_dying = 1; 936 if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { 937 for (i = 0; dev->subdevs[i]; i++) 938 rv |= config_deactivate(dev->subdevs[i]); 939 } 940 break; 941 } 942 return (rv); 943 } 944 945 void 946 usb_childdet(device_t self, device_t child) 947 { 948 int i, last = -1; 949 struct usb_softc *sc = device_private(self); 950 struct usbd_device *dev; 951 952 if ((dev = sc->sc_port.device) == NULL || dev->subdevs == NULL) 953 return; 954 955 for (i = 0; dev->subdevs[i] != NULL; i++) 956 last = i; 957 958 for (i = 0; dev->subdevs[i] != NULL; i++) { 959 if (dev->subdevs[i] == child) { 960 dev->subdevs[i] = dev->subdevs[last]; 961 dev->subdevs[last] = NULL; 962 } 963 } 964 } 965 966 int 967 usb_detach(device_t self, int flags) 968 { 969 struct usb_softc *sc = device_private(self); 970 struct usb_event *ue; 971 972 DPRINTF(("usb_detach: start\n")); 973 974 pmf_device_deregister(self); 975 /* Kill off event thread. */ 976 while (sc->sc_event_thread != NULL) { 977 wakeup(&sc->sc_bus->needs_explore); 978 tsleep(sc, PWAIT, "usbdet", hz * 60); 979 } 980 DPRINTF(("usb_detach: event thread dead\n")); 981 982 /* Make all devices disconnect. */ 983 if (sc->sc_port.device != NULL) 984 usb_disconnect_port(&sc->sc_port, self); 985 986 #ifdef USB_USE_SOFTINTR 987 if (sc->sc_bus->soft != NULL) { 988 softint_disestablish(sc->sc_bus->soft); 989 sc->sc_bus->soft = NULL; 990 } 991 #endif 992 993 ue = usb_alloc_event(); 994 ue->u.ue_ctrlr.ue_bus = device_unit(self); 995 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 996 997 return (0); 998 } 999 1000 #ifdef COMPAT_30 1001 Static void 1002 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1003 const struct usb_device_info *ue) 1004 { 1005 const unsigned char *p; 1006 unsigned char *q; 1007 int i, n; 1008 1009 uo->udi_bus = ue->udi_bus; 1010 uo->udi_addr = ue->udi_addr; 1011 uo->udi_cookie = ue->udi_cookie; 1012 for (i = 0, p = (const unsigned char *)ue->udi_product, 1013 q = (unsigned char *)uo->udi_product; 1014 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1015 if (*p < 0x80) 1016 q[i++] = *p; 1017 else { 1018 q[i++] = '?'; 1019 if ((*p & 0xe0) == 0xe0) 1020 p++; 1021 p++; 1022 } 1023 } 1024 q[i] = 0; 1025 1026 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1027 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1028 if (* p < 0x80) 1029 q[i++] = *p; 1030 else { 1031 q[i++] = '?'; 1032 p++; 1033 if ((*p & 0xe0) == 0xe0) 1034 p++; 1035 } 1036 } 1037 q[i] = 0; 1038 1039 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1040 1041 uo->udi_productNo = ue->udi_productNo; 1042 uo->udi_vendorNo = ue->udi_vendorNo; 1043 uo->udi_releaseNo = ue->udi_releaseNo; 1044 uo->udi_class = ue->udi_class; 1045 uo->udi_subclass = ue->udi_subclass; 1046 uo->udi_protocol = ue->udi_protocol; 1047 uo->udi_config = ue->udi_config; 1048 uo->udi_speed = ue->udi_speed; 1049 uo->udi_power = ue->udi_power; 1050 uo->udi_nports = ue->udi_nports; 1051 1052 for (n=0; n<USB_MAX_DEVNAMES; n++) 1053 memcpy(uo->udi_devnames[n], 1054 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1055 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1056 } 1057 #endif 1058
Indexes created Wed Sep 24 05:09:52 GMT 2025