usb.c revision 1.125.6.5
1 /* $NetBSD: usb.c,v 1.125.6.5 2011/12/09 01:53:00 mrg 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 1.125.6.5 2011/12/09 01:53:00 mrg Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_usb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/device.h> 50 #include <sys/kthread.h> 51 #include <sys/proc.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/poll.h> 55 #include <sys/select.h> 56 #include <sys/vnode.h> 57 #include <sys/signalvar.h> 58 #include <sys/intr.h> 59 #include <sys/module.h> 60 61 #include <dev/usb/usb.h> 62 #include <dev/usb/usbdi.h> 63 #include <dev/usb/usbdi_util.h> 64 #include <dev/usb/usb_verbose.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) printf x 75 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 76 int usbdebug = 0; 77 /* 78 * 0 - do usual exploration 79 * 1 - do not use timeout exploration 80 * >1 - do no exploration 81 */ 82 int usb_noexplore = 0; 83 #else 84 #define DPRINTF(x) 85 #define DPRINTFN(n,x) 86 #define usb_noexplore 0 87 #endif 88 89 struct usb_softc { 90 #if 0 91 device_t sc_dev; /* base device */ 92 #endif 93 usbd_bus_handle sc_bus; /* USB controller */ 94 struct usbd_port sc_port; /* dummy port for root hub */ 95 96 struct lwp *sc_event_thread; 97 98 char sc_dying; 99 }; 100 101 struct usb_taskq { 102 TAILQ_HEAD(, usb_task) tasks; 103 kmutex_t lock; 104 kcondvar_t cv; 105 struct lwp *task_thread_lwp; 106 const char *name; 107 int taskcreated; /* task thread exists. */ 108 }; 109 110 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 111 112 dev_type_open(usbopen); 113 dev_type_close(usbclose); 114 dev_type_read(usbread); 115 dev_type_ioctl(usbioctl); 116 dev_type_poll(usbpoll); 117 dev_type_kqfilter(usbkqfilter); 118 119 const struct cdevsw usb_cdevsw = { 120 usbopen, usbclose, usbread, nowrite, usbioctl, 121 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 122 }; 123 124 Static void usb_discover(struct usb_softc *); 125 Static void usb_create_event_thread(device_t); 126 Static void usb_event_thread(void *); 127 Static void usb_task_thread(void *); 128 129 #define USB_MAX_EVENTS 100 130 struct usb_event_q { 131 struct usb_event ue; 132 SIMPLEQ_ENTRY(usb_event_q) next; 133 }; 134 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 135 SIMPLEQ_HEAD_INITIALIZER(usb_events); 136 Static int usb_nevents = 0; 137 Static struct selinfo usb_selevent; 138 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 139 Static void *usb_async_sih; 140 Static int usb_dev_open = 0; 141 Static struct usb_event *usb_alloc_event(void); 142 Static void usb_free_event(struct usb_event *); 143 Static void usb_add_event(int, struct usb_event *); 144 Static int usb_get_next_event(struct usb_event *); 145 Static void usb_async_intr(void *); 146 147 #ifdef COMPAT_30 148 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 149 #endif 150 151 Static const char *usbrev_str[] = USBREV_STR; 152 153 static int usb_match(device_t, cfdata_t, void *); 154 static void usb_attach(device_t, device_t, void *); 155 static int usb_detach(device_t, int); 156 static int usb_activate(device_t, enum devact); 157 static void usb_childdet(device_t, device_t); 158 static void usb_doattach(device_t); 159 160 extern struct cfdriver usb_cd; 161 162 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 163 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 164 DVF_DETACH_SHUTDOWN); 165 166 int 167 usb_match(device_t parent, cfdata_t match, void *aux) 168 { 169 DPRINTF(("usbd_match\n")); 170 return (UMATCH_GENERIC); 171 } 172 173 void 174 usb_attach(device_t parent, device_t self, void *aux) 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 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 bool mpsafe = sc->sc_bus->methods->get_locks ? true : false; 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 if (mpsafe) { 232 sc->sc_bus->methods->get_locks(sc->sc_bus, 233 &sc->sc_bus->intr_lock, &sc->sc_bus->lock); 234 } else { 235 sc->sc_bus->intr_lock = sc->sc_bus->lock = NULL; 236 } 237 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 238 239 ue = usb_alloc_event(); 240 ue->u.ue_ctrlr.ue_bus = device_unit(self); 241 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 242 243 /* XXX we should have our own level */ 244 sc->sc_bus->soft = softint_establish( 245 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 246 sc->sc_bus->methods->soft_intr, sc->sc_bus); 247 if (sc->sc_bus->soft == NULL) { 248 aprint_error("%s: can't register softintr\n", 249 device_xname(self)); 250 sc->sc_dying = 1; 251 return; 252 } 253 254 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 255 &sc->sc_port); 256 if (!err) { 257 dev = sc->sc_port.device; 258 if (dev->hub == NULL) { 259 sc->sc_dying = 1; 260 aprint_error("%s: root device is not a hub\n", 261 device_xname(self)); 262 return; 263 } 264 sc->sc_bus->root_hub = dev; 265 #if 1 266 /* 267 * Turning this code off will delay attachment of USB devices 268 * until the USB event thread is running, which means that 269 * the keyboard will not work until after cold boot. 270 */ 271 if (cold && (device_cfdata(self)->cf_flags & 1)) 272 dev->hub->explore(sc->sc_bus->root_hub); 273 #endif 274 } else { 275 aprint_error("%s: root hub problem, error=%d\n", 276 device_xname(self), err); 277 sc->sc_dying = 1; 278 } 279 280 config_pending_incr(); 281 usb_create_event_thread(self); 282 283 if (!pmf_device_register(self, NULL, NULL)) 284 aprint_error_dev(self, "couldn't establish power handler\n"); 285 286 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 287 usb_async_intr, NULL); 288 289 return; 290 } 291 292 static const char *taskq_names[] = USB_TASKQ_NAMES; 293 294 void 295 usb_create_event_thread(device_t self) 296 { 297 struct usb_softc *sc = device_private(self); 298 struct usb_taskq *taskq; 299 int i; 300 301 if (kthread_create(PRI_NONE, 0, NULL, usb_event_thread, sc, 302 &sc->sc_event_thread, "%s", device_xname(self))) { 303 printf("%s: unable to create event thread for\n", 304 device_xname(self)); 305 panic("usb_create_event_thread"); 306 } 307 for (i = 0; i < USB_NUM_TASKQS; i++) { 308 taskq = &usb_taskq[i]; 309 310 if (taskq->taskcreated) 311 continue; 312 313 TAILQ_INIT(&taskq->tasks); 314 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_NONE); 315 cv_init(&taskq->cv, "usbtsk"); 316 taskq->taskcreated = 1; 317 taskq->name = taskq_names[i]; 318 if (kthread_create(PRI_NONE, 0, NULL, usb_task_thread, 319 taskq, &taskq->task_thread_lwp, "%s", taskq->name)) { 320 printf("unable to create task thread: %s\n", taskq->name); 321 panic("usb_create_event_thread task"); 322 } 323 } 324 } 325 326 /* 327 * Add a task to be performed by the task thread. This function can be 328 * called from any context and the task will be executed in a process 329 * context ASAP. 330 */ 331 void 332 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 333 { 334 struct usb_taskq *taskq; 335 336 taskq = &usb_taskq[queue]; 337 mutex_enter(&taskq->lock); 338 if (task->queue == -1) { 339 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 340 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 341 task->queue = queue; 342 } else { 343 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 344 } 345 cv_signal(&taskq->cv); 346 mutex_exit(&taskq->lock); 347 } 348 349 void 350 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 351 { 352 struct usb_taskq *taskq; 353 354 taskq = &usb_taskq[task->queue]; 355 mutex_enter(&taskq->lock); 356 if (task->queue != -1) { 357 TAILQ_REMOVE(&taskq->tasks, task, next); 358 task->queue = -1; 359 } 360 mutex_exit(&taskq->lock); 361 } 362 363 void 364 usb_event_thread(void *arg) 365 { 366 struct usb_softc *sc = arg; 367 368 DPRINTF(("usb_event_thread: start\n")); 369 370 /* 371 * In case this controller is a companion controller to an 372 * EHCI controller we need to wait until the EHCI controller 373 * has grabbed the port. 374 * XXX It would be nicer to do this with a tsleep(), but I don't 375 * know how to synchronize the creation of the threads so it 376 * will work. 377 */ 378 usb_delay_ms(sc->sc_bus, 500); 379 380 /* Make sure first discover does something. */ 381 if (sc->sc_bus->lock) 382 mutex_enter(sc->sc_bus->lock); 383 sc->sc_bus->needs_explore = 1; 384 usb_discover(sc); 385 if (sc->sc_bus->lock) 386 mutex_exit(sc->sc_bus->lock); 387 config_pending_decr(); 388 389 if (sc->sc_bus->lock) 390 mutex_enter(sc->sc_bus->lock); 391 while (!sc->sc_dying) { 392 if (usb_noexplore < 2) 393 usb_discover(sc); 394 395 if (sc->sc_bus->lock) 396 cv_timedwait(&sc->sc_bus->needs_explore_cv, 397 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 398 else 399 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, 400 "usbevt", usb_noexplore ? 0 : hz * 60); 401 DPRINTFN(2,("usb_event_thread: woke up\n")); 402 } 403 sc->sc_event_thread = NULL; 404 405 /* In case parent is waiting for us to exit. */ 406 if (sc->sc_bus->lock) { 407 cv_signal(&sc->sc_bus->needs_explore_cv); 408 mutex_exit(sc->sc_bus->lock); 409 } else 410 wakeup(sc); 411 412 DPRINTF(("usb_event_thread: exit\n")); 413 kthread_exit(0); 414 } 415 416 void 417 usb_task_thread(void *arg) 418 { 419 struct usb_task *task; 420 struct usb_taskq *taskq; 421 422 taskq = arg; 423 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 424 425 mutex_enter(&taskq->lock); 426 for (;;) { 427 task = TAILQ_FIRST(&taskq->tasks); 428 if (task == NULL) { 429 cv_wait(&taskq->cv, &taskq->lock); 430 task = TAILQ_FIRST(&taskq->tasks); 431 } 432 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 433 if (task != NULL) { 434 TAILQ_REMOVE(&taskq->tasks, task, next); 435 task->queue = -1; 436 mutex_exit(&taskq->lock); 437 task->fun(task->arg); 438 mutex_enter(&taskq->lock); 439 } 440 } 441 mutex_exit(&taskq->lock); 442 } 443 444 int 445 usbctlprint(void *aux, const char *pnp) 446 { 447 /* only "usb"es can attach to host controllers */ 448 if (pnp) 449 aprint_normal("usb at %s", pnp); 450 451 return (UNCONF); 452 } 453 454 int 455 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 456 { 457 int unit = minor(dev); 458 struct usb_softc *sc; 459 460 if (unit == USB_DEV_MINOR) { 461 if (usb_dev_open) 462 return (EBUSY); 463 usb_dev_open = 1; 464 mutex_enter(proc_lock); 465 usb_async_proc = 0; 466 mutex_exit(proc_lock); 467 return (0); 468 } 469 470 sc = device_lookup_private(&usb_cd, unit); 471 if (!sc) 472 return (ENXIO); 473 474 if (sc->sc_dying) 475 return (EIO); 476 477 return (0); 478 } 479 480 int 481 usbread(dev_t dev, struct uio *uio, int flag) 482 { 483 struct usb_event *ue; 484 #ifdef COMPAT_30 485 struct usb_event_old *ueo = NULL; /* XXXGCC */ 486 #endif 487 int s, error, n, useold; 488 489 if (minor(dev) != USB_DEV_MINOR) 490 return (ENXIO); 491 492 useold = 0; 493 switch (uio->uio_resid) { 494 #ifdef COMPAT_30 495 case sizeof(struct usb_event_old): 496 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 497 M_WAITOK|M_ZERO); 498 useold = 1; 499 /* FALLTHRU */ 500 #endif 501 case sizeof(struct usb_event): 502 ue = usb_alloc_event(); 503 break; 504 default: 505 return (EINVAL); 506 } 507 508 error = 0; 509 s = splusb(); 510 for (;;) { 511 n = usb_get_next_event(ue); 512 if (n != 0) 513 break; 514 if (flag & IO_NDELAY) { 515 error = EWOULDBLOCK; 516 break; 517 } 518 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 519 if (error) 520 break; 521 } 522 splx(s); 523 if (!error) { 524 #ifdef COMPAT_30 525 if (useold) { /* copy fields to old struct */ 526 ueo->ue_type = ue->ue_type; 527 memcpy(&ueo->ue_time, &ue->ue_time, 528 sizeof(struct timespec)); 529 switch (ue->ue_type) { 530 case USB_EVENT_DEVICE_ATTACH: 531 case USB_EVENT_DEVICE_DETACH: 532 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 533 break; 534 535 case USB_EVENT_CTRLR_ATTACH: 536 case USB_EVENT_CTRLR_DETACH: 537 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 538 break; 539 540 case USB_EVENT_DRIVER_ATTACH: 541 case USB_EVENT_DRIVER_DETACH: 542 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 543 memcpy(ueo->u.ue_driver.ue_devname, 544 ue->u.ue_driver.ue_devname, 545 sizeof(ue->u.ue_driver.ue_devname)); 546 break; 547 default: 548 ; 549 } 550 551 error = uiomove((void *)ueo, sizeof *ueo, uio); 552 } else 553 #endif 554 error = uiomove((void *)ue, sizeof *ue, uio); 555 } 556 usb_free_event(ue); 557 #ifdef COMPAT_30 558 if (useold) 559 free(ueo, M_USBDEV); 560 #endif 561 562 return (error); 563 } 564 565 int 566 usbclose(dev_t dev, int flag, int mode, 567 struct lwp *l) 568 { 569 int unit = minor(dev); 570 571 if (unit == USB_DEV_MINOR) { 572 mutex_enter(proc_lock); 573 usb_async_proc = 0; 574 mutex_exit(proc_lock); 575 usb_dev_open = 0; 576 } 577 578 return (0); 579 } 580 581 int 582 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 583 { 584 struct usb_softc *sc; 585 int unit = minor(devt); 586 587 if (unit == USB_DEV_MINOR) { 588 switch (cmd) { 589 case FIONBIO: 590 /* All handled in the upper FS layer. */ 591 return (0); 592 593 case FIOASYNC: 594 mutex_enter(proc_lock); 595 if (*(int *)data) 596 usb_async_proc = l->l_proc; 597 else 598 usb_async_proc = 0; 599 mutex_exit(proc_lock); 600 return (0); 601 602 default: 603 return (EINVAL); 604 } 605 } 606 607 sc = device_lookup_private(&usb_cd, unit); 608 609 if (sc->sc_dying) 610 return (EIO); 611 612 switch (cmd) { 613 #ifdef USB_DEBUG 614 case USB_SETDEBUG: 615 if (!(flag & FWRITE)) 616 return (EBADF); 617 usbdebug = ((*(int *)data) & 0x000000ff); 618 break; 619 #endif /* USB_DEBUG */ 620 case USB_REQUEST: 621 { 622 struct usb_ctl_request *ur = (void *)data; 623 int len = UGETW(ur->ucr_request.wLength); 624 struct iovec iov; 625 struct uio uio; 626 void *ptr = 0; 627 int addr = ur->ucr_addr; 628 usbd_status err; 629 int error = 0; 630 631 if (!(flag & FWRITE)) 632 return (EBADF); 633 634 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 635 if (len < 0 || len > 32768) 636 return (EINVAL); 637 if (addr < 0 || addr >= USB_MAX_DEVICES || 638 sc->sc_bus->devices[addr] == 0) 639 return (EINVAL); 640 if (len != 0) { 641 iov.iov_base = (void *)ur->ucr_data; 642 iov.iov_len = len; 643 uio.uio_iov = &iov; 644 uio.uio_iovcnt = 1; 645 uio.uio_resid = len; 646 uio.uio_offset = 0; 647 uio.uio_rw = 648 ur->ucr_request.bmRequestType & UT_READ ? 649 UIO_READ : UIO_WRITE; 650 uio.uio_vmspace = l->l_proc->p_vmspace; 651 ptr = malloc(len, M_TEMP, M_WAITOK); 652 if (uio.uio_rw == UIO_WRITE) { 653 error = uiomove(ptr, len, &uio); 654 if (error) 655 goto ret; 656 } 657 } 658 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 659 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 660 USBD_DEFAULT_TIMEOUT); 661 if (err) { 662 error = EIO; 663 goto ret; 664 } 665 if (len > ur->ucr_actlen) 666 len = ur->ucr_actlen; 667 if (len != 0) { 668 if (uio.uio_rw == UIO_READ) { 669 error = uiomove(ptr, len, &uio); 670 if (error) 671 goto ret; 672 } 673 } 674 ret: 675 if (ptr) 676 free(ptr, M_TEMP); 677 return (error); 678 } 679 680 case USB_DEVICEINFO: 681 { 682 usbd_device_handle dev; 683 struct usb_device_info *di = (void *)data; 684 int addr = di->udi_addr; 685 686 if (addr < 1 || addr >= USB_MAX_DEVICES) 687 return EINVAL; 688 if ((dev = sc->sc_bus->devices[addr]) == NULL) 689 return ENXIO; 690 usbd_fill_deviceinfo(dev, di, 1); 691 break; 692 } 693 694 #ifdef COMPAT_30 695 case USB_DEVICEINFO_OLD: 696 { 697 usbd_device_handle dev; 698 struct usb_device_info_old *di = (void *)data; 699 int addr = di->udi_addr; 700 701 if (addr < 1 || addr >= USB_MAX_DEVICES) 702 return EINVAL; 703 if ((dev = sc->sc_bus->devices[addr]) == NULL) 704 return ENXIO; 705 usbd_fill_deviceinfo_old(dev, di, 1); 706 break; 707 } 708 #endif 709 710 case USB_DEVICESTATS: 711 *(struct usb_device_stats *)data = sc->sc_bus->stats; 712 break; 713 714 default: 715 return (EINVAL); 716 } 717 return (0); 718 } 719 720 int 721 usbpoll(dev_t dev, int events, struct lwp *l) 722 { 723 int revents, mask, s; 724 725 if (minor(dev) == USB_DEV_MINOR) { 726 revents = 0; 727 mask = POLLIN | POLLRDNORM; 728 729 s = splusb(); 730 if (events & mask && usb_nevents > 0) 731 revents |= events & mask; 732 if (revents == 0 && events & mask) 733 selrecord(l, &usb_selevent); 734 splx(s); 735 736 return (revents); 737 } else { 738 return (0); 739 } 740 } 741 742 static void 743 filt_usbrdetach(struct knote *kn) 744 { 745 int s; 746 747 s = splusb(); 748 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 749 splx(s); 750 } 751 752 static int 753 filt_usbread(struct knote *kn, long hint) 754 { 755 756 if (usb_nevents == 0) 757 return (0); 758 759 kn->kn_data = sizeof(struct usb_event); 760 return (1); 761 } 762 763 static const struct filterops usbread_filtops = 764 { 1, NULL, filt_usbrdetach, filt_usbread }; 765 766 int 767 usbkqfilter(dev_t dev, struct knote *kn) 768 { 769 struct klist *klist; 770 int s; 771 772 switch (kn->kn_filter) { 773 case EVFILT_READ: 774 if (minor(dev) != USB_DEV_MINOR) 775 return (1); 776 klist = &usb_selevent.sel_klist; 777 kn->kn_fop = &usbread_filtops; 778 break; 779 780 default: 781 return (EINVAL); 782 } 783 784 kn->kn_hook = NULL; 785 786 s = splusb(); 787 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 788 splx(s); 789 790 return (0); 791 } 792 793 /* Explore device tree from the root. */ 794 Static void 795 usb_discover(struct usb_softc *sc) 796 { 797 798 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 799 800 DPRINTFN(2,("usb_discover\n")); 801 if (usb_noexplore > 1) 802 return; 803 /* 804 * We need mutual exclusion while traversing the device tree, 805 * but this is guaranteed since this function is only called 806 * from the event thread for the controller. 807 * 808 * Also, we now have sc_bus->lock held for MPSAFE controllers. 809 */ 810 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 811 sc->sc_bus->needs_explore = 0; 812 if (sc->sc_bus->lock) 813 mutex_exit(sc->sc_bus->lock); 814 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 815 if (sc->sc_bus->lock) 816 mutex_enter(sc->sc_bus->lock); 817 } 818 } 819 820 void 821 usb_needs_explore(usbd_device_handle dev) 822 { 823 DPRINTFN(2,("usb_needs_explore\n")); 824 if (dev->bus->lock) 825 mutex_enter(dev->bus->lock); 826 dev->bus->needs_explore = 1; 827 if (dev->bus->lock) { 828 cv_signal(&dev->bus->needs_explore_cv); 829 mutex_exit(dev->bus->lock); 830 } else 831 wakeup(&dev->bus->needs_explore); 832 } 833 834 void 835 usb_needs_reattach(usbd_device_handle dev) 836 { 837 DPRINTFN(2,("usb_needs_reattach\n")); 838 if (dev->bus->lock) 839 mutex_enter(dev->bus->lock); 840 dev->powersrc->reattach = 1; 841 dev->bus->needs_explore = 1; 842 if (dev->bus->lock) { 843 cv_signal(&dev->bus->needs_explore_cv); 844 mutex_exit(dev->bus->lock); 845 } else 846 wakeup(&dev->bus->needs_explore); 847 } 848 849 /* Called at splusb() */ 850 int 851 usb_get_next_event(struct usb_event *ue) 852 { 853 struct usb_event_q *ueq; 854 855 if (usb_nevents <= 0) 856 return (0); 857 ueq = SIMPLEQ_FIRST(&usb_events); 858 #ifdef DIAGNOSTIC 859 if (ueq == NULL) { 860 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 861 usb_nevents = 0; 862 return (0); 863 } 864 #endif 865 if (ue) 866 *ue = ueq->ue; 867 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 868 usb_free_event((struct usb_event *)(void *)ueq); 869 usb_nevents--; 870 return (1); 871 } 872 873 void 874 usbd_add_dev_event(int type, usbd_device_handle udev) 875 { 876 struct usb_event *ue = usb_alloc_event(); 877 878 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 879 usb_add_event(type, ue); 880 } 881 882 void 883 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 884 { 885 struct usb_event *ue = usb_alloc_event(); 886 887 ue->u.ue_driver.ue_cookie = udev->cookie; 888 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 889 sizeof ue->u.ue_driver.ue_devname); 890 usb_add_event(type, ue); 891 } 892 893 Static struct usb_event * 894 usb_alloc_event(void) 895 { 896 /* Yes, this is right; we allocate enough so that we can use it later */ 897 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 898 } 899 900 Static void 901 usb_free_event(struct usb_event *uep) 902 { 903 free(uep, M_USBDEV); 904 } 905 906 Static void 907 usb_add_event(int type, struct usb_event *uep) 908 { 909 struct usb_event_q *ueq; 910 struct timeval thetime; 911 int s; 912 913 microtime(&thetime); 914 /* Don't want to wait here inside splusb() */ 915 ueq = (struct usb_event_q *)(void *)uep; 916 ueq->ue = *uep; 917 ueq->ue.ue_type = type; 918 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 919 920 s = splusb(); 921 if (++usb_nevents >= USB_MAX_EVENTS) { 922 /* Too many queued events, drop an old one. */ 923 DPRINTFN(-1,("usb: event dropped\n")); 924 (void)usb_get_next_event(0); 925 } 926 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 927 wakeup(&usb_events); 928 selnotify(&usb_selevent, 0, 0); 929 if (usb_async_proc != NULL) { 930 kpreempt_disable(); 931 softint_schedule(usb_async_sih); 932 kpreempt_enable(); 933 } 934 splx(s); 935 } 936 937 Static void 938 usb_async_intr(void *cookie) 939 { 940 proc_t *proc; 941 942 mutex_enter(proc_lock); 943 if ((proc = usb_async_proc) != NULL) 944 psignal(proc, SIGIO); 945 mutex_exit(proc_lock); 946 } 947 948 void 949 usb_schedsoftintr(usbd_bus_handle bus) 950 { 951 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 952 if (bus->use_polling) { 953 bus->methods->soft_intr(bus); 954 } else { 955 kpreempt_disable(); 956 softint_schedule(bus->soft); 957 kpreempt_enable(); 958 } 959 } 960 961 int 962 usb_activate(device_t self, enum devact act) 963 { 964 struct usb_softc *sc = device_private(self); 965 966 switch (act) { 967 case DVACT_DEACTIVATE: 968 sc->sc_dying = 1; 969 return 0; 970 default: 971 return EOPNOTSUPP; 972 } 973 } 974 975 void 976 usb_childdet(device_t self, device_t child) 977 { 978 int i; 979 struct usb_softc *sc = device_private(self); 980 struct usbd_device *dev; 981 982 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 983 return; 984 985 for (i = 0; i < dev->subdevlen; i++) 986 if (dev->subdevs[i] == child) 987 dev->subdevs[i] = NULL; 988 } 989 990 int 991 usb_detach(device_t self, int flags) 992 { 993 struct usb_softc *sc = device_private(self); 994 struct usb_event *ue; 995 int rc; 996 997 DPRINTF(("usb_detach: start\n")); 998 999 /* Make all devices disconnect. */ 1000 if (sc->sc_port.device != NULL && 1001 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1002 return rc; 1003 1004 pmf_device_deregister(self); 1005 /* Kill off event thread. */ 1006 sc->sc_dying = 1; 1007 while (sc->sc_event_thread != NULL) { 1008 if (sc->sc_bus->lock) { 1009 mutex_enter(sc->sc_bus->lock); 1010 cv_signal(&sc->sc_bus->needs_explore_cv); 1011 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1012 sc->sc_bus->lock, hz * 60); 1013 mutex_exit(sc->sc_bus->lock); 1014 } else { 1015 wakeup(&sc->sc_bus->needs_explore); 1016 tsleep(sc, PWAIT, "usbdet", hz * 60); 1017 } 1018 } 1019 DPRINTF(("usb_detach: event thread dead\n")); 1020 1021 if (sc->sc_bus->soft != NULL) { 1022 softint_disestablish(sc->sc_bus->soft); 1023 sc->sc_bus->soft = NULL; 1024 } 1025 1026 ue = usb_alloc_event(); 1027 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1028 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1029 1030 return (0); 1031 } 1032 1033 #ifdef COMPAT_30 1034 Static void 1035 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1036 const struct usb_device_info *ue) 1037 { 1038 const unsigned char *p; 1039 unsigned char *q; 1040 int i, n; 1041 1042 uo->udi_bus = ue->udi_bus; 1043 uo->udi_addr = ue->udi_addr; 1044 uo->udi_cookie = ue->udi_cookie; 1045 for (i = 0, p = (const unsigned char *)ue->udi_product, 1046 q = (unsigned char *)uo->udi_product; 1047 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1048 if (*p < 0x80) 1049 q[i++] = *p; 1050 else { 1051 q[i++] = '?'; 1052 if ((*p & 0xe0) == 0xe0) 1053 p++; 1054 p++; 1055 } 1056 } 1057 q[i] = 0; 1058 1059 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1060 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1061 if (* p < 0x80) 1062 q[i++] = *p; 1063 else { 1064 q[i++] = '?'; 1065 p++; 1066 if ((*p & 0xe0) == 0xe0) 1067 p++; 1068 } 1069 } 1070 q[i] = 0; 1071 1072 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1073 1074 uo->udi_productNo = ue->udi_productNo; 1075 uo->udi_vendorNo = ue->udi_vendorNo; 1076 uo->udi_releaseNo = ue->udi_releaseNo; 1077 uo->udi_class = ue->udi_class; 1078 uo->udi_subclass = ue->udi_subclass; 1079 uo->udi_protocol = ue->udi_protocol; 1080 uo->udi_config = ue->udi_config; 1081 uo->udi_speed = ue->udi_speed; 1082 uo->udi_power = ue->udi_power; 1083 uo->udi_nports = ue->udi_nports; 1084 1085 for (n=0; n<USB_MAX_DEVNAMES; n++) 1086 memcpy(uo->udi_devnames[n], 1087 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1088 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1089 } 1090 #endif 1091
Indexes created Tue Sep 30 20:09:53 GMT 2025