usb.c revision 1.156.2.5
1 /* $NetBSD: usb.c,v 1.156.2.5 2015/03/19 17:26:43 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002, 2008, 2012 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 and Matthew R. Green (mrg (at) eterna.com.au). 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 1.156.2.5 2015/03/19 17:26:43 skrll Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_usb.h" 44 #include "opt_compat_netbsd.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/kmem.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 #include <sys/module.h> 62 #include <sys/mutex.h> 63 #include <sys/bus.h> 64 #include <sys/once.h> 65 #include <sys/atomic.h> 66 #include <sys/sysctl.h> 67 68 #include <dev/usb/usb.h> 69 #include <dev/usb/usbdi.h> 70 #include <dev/usb/usbdi_util.h> 71 #include <dev/usb/usbdivar.h> 72 #include <dev/usb/usb_verbose.h> 73 #include <dev/usb/usb_quirks.h> 74 #include <dev/usb/usbhist.h> 75 76 #if defined(USBHIST) 77 78 USBHIST_DEFINE(usbhist); 79 #ifndef USBHIST_SIZE 80 #define USBHIST_SIZE 50000 81 #endif 82 83 #endif 84 85 #define USB_DEV_MINOR 255 86 87 #ifdef USB_DEBUG 88 #define DPRINTF(x) if (usbdebug) printf x 89 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 90 int usbdebug = 0; 91 /* 92 * 0 - do usual exploration 93 * 1 - do not use timeout exploration 94 * >1 - do no exploration 95 */ 96 int usb_noexplore = 0; 97 98 SYSCTL_SETUP(sysctl_hw_usb_setup, "sysctl hw.usb setup") 99 { 100 int err; 101 const struct sysctlnode *rnode; 102 const struct sysctlnode *cnode; 103 104 err = sysctl_createv(clog, 0, NULL, &rnode, 105 CTLFLAG_PERMANENT, CTLTYPE_NODE, "usb", 106 SYSCTL_DESCR("usb global controls"), 107 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 108 109 if (err) 110 goto fail; 111 112 /* control debugging printfs */ 113 err = sysctl_createv(clog, 0, &rnode, &cnode, 114 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 115 "debug", SYSCTL_DESCR("Enable debugging output"), 116 NULL, 0, &usbdebug, sizeof(usbdebug), CTL_CREATE, CTL_EOL); 117 if (err) 118 goto fail; 119 120 return; 121 fail: 122 aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err); 123 } 124 125 #else 126 #define DPRINTF(x) 127 #define DPRINTFN(n,x) 128 #define usb_noexplore 0 129 #endif 130 131 struct usb_softc { 132 #if 0 133 device_t sc_dev; /* base device */ 134 #endif 135 struct usbd_bus *sc_bus; /* USB controller */ 136 struct usbd_port sc_port; /* dummy port for root hub */ 137 138 struct lwp *sc_event_thread; 139 140 char sc_dying; 141 }; 142 143 struct usb_taskq { 144 TAILQ_HEAD(, usb_task) tasks; 145 kmutex_t lock; 146 kcondvar_t cv; 147 struct lwp *task_thread_lwp; 148 const char *name; 149 }; 150 151 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 152 153 dev_type_open(usbopen); 154 dev_type_close(usbclose); 155 dev_type_read(usbread); 156 dev_type_ioctl(usbioctl); 157 dev_type_poll(usbpoll); 158 dev_type_kqfilter(usbkqfilter); 159 160 const struct cdevsw usb_cdevsw = { 161 .d_open = usbopen, 162 .d_close = usbclose, 163 .d_read = usbread, 164 .d_write = nowrite, 165 .d_ioctl = usbioctl, 166 .d_stop = nostop, 167 .d_tty = notty, 168 .d_poll = usbpoll, 169 .d_mmap = nommap, 170 .d_kqfilter = usbkqfilter, 171 .d_discard = nodiscard, 172 .d_flag = D_OTHER 173 }; 174 175 Static void usb_discover(struct usb_softc *); 176 Static void usb_create_event_thread(device_t); 177 Static void usb_event_thread(void *); 178 Static void usb_task_thread(void *); 179 180 #define USB_MAX_EVENTS 100 181 struct usb_event_q { 182 struct usb_event ue; 183 SIMPLEQ_ENTRY(usb_event_q) next; 184 }; 185 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 186 SIMPLEQ_HEAD_INITIALIZER(usb_events); 187 Static int usb_nevents = 0; 188 Static struct selinfo usb_selevent; 189 Static kmutex_t usb_event_lock; 190 Static kcondvar_t usb_event_cv; 191 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 192 Static void *usb_async_sih; 193 Static int usb_dev_open = 0; 194 Static struct usb_event *usb_alloc_event(void); 195 Static void usb_free_event(struct usb_event *); 196 Static void usb_add_event(int, struct usb_event *); 197 Static int usb_get_next_event(struct usb_event *); 198 Static void usb_async_intr(void *); 199 Static void usb_soft_intr(void *); 200 201 #ifdef COMPAT_30 202 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 203 #endif 204 205 Static const char *usbrev_str[] = USBREV_STR; 206 207 static int usb_match(device_t, cfdata_t, void *); 208 static void usb_attach(device_t, device_t, void *); 209 static int usb_detach(device_t, int); 210 static int usb_activate(device_t, enum devact); 211 static void usb_childdet(device_t, device_t); 212 static int usb_once_init(void); 213 static void usb_doattach(device_t); 214 215 extern struct cfdriver usb_cd; 216 217 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 218 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 219 DVF_DETACH_SHUTDOWN); 220 221 static const char *taskq_names[] = USB_TASKQ_NAMES; 222 223 int 224 usb_match(device_t parent, cfdata_t match, void *aux) 225 { 226 DPRINTF(("usbd_match\n")); 227 return UMATCH_GENERIC; 228 } 229 230 void 231 usb_attach(device_t parent, device_t self, void *aux) 232 { 233 static ONCE_DECL(init_control); 234 struct usb_softc *sc = device_private(self); 235 int usbrev; 236 237 sc->sc_bus = aux; 238 usbrev = sc->sc_bus->ub_revision; 239 240 aprint_naive("\n"); 241 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 242 switch (usbrev) { 243 case USBREV_1_0: 244 case USBREV_1_1: 245 case USBREV_2_0: 246 case USBREV_3_0: 247 break; 248 default: 249 aprint_error(", not supported\n"); 250 sc->sc_dying = 1; 251 return; 252 } 253 aprint_normal("\n"); 254 255 /* XXX we should have our own level */ 256 sc->sc_bus->ub_soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 257 usb_soft_intr, sc->sc_bus); 258 if (sc->sc_bus->ub_soft == NULL) { 259 aprint_error("%s: can't register softintr\n", 260 device_xname(self)); 261 sc->sc_dying = 1; 262 return; 263 } 264 265 sc->sc_bus->ub_methods->ubm_getlock(sc->sc_bus, &sc->sc_bus->ub_lock); 266 KASSERT(sc->sc_bus->ub_lock != NULL); 267 268 RUN_ONCE(&init_control, usb_once_init); 269 config_interrupts(self, usb_doattach); 270 } 271 272 static int 273 usb_once_init(void) 274 { 275 struct usb_taskq *taskq; 276 int i; 277 278 USBHIST_INIT(usbhist, USBHIST_SIZE); 279 280 selinit(&usb_selevent); 281 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 282 cv_init(&usb_event_cv, "usbrea"); 283 284 for (i = 0; i < USB_NUM_TASKQS; i++) { 285 taskq = &usb_taskq[i]; 286 287 TAILQ_INIT(&taskq->tasks); 288 /* 289 * Since USB task methods usb_{add,rem}_task are callable 290 * from any context, we have to make this lock a spinlock. 291 */ 292 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 293 cv_init(&taskq->cv, "usbtsk"); 294 taskq->name = taskq_names[i]; 295 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 296 usb_task_thread, taskq, &taskq->task_thread_lwp, 297 "%s", taskq->name)) { 298 printf("unable to create task thread: %s\n", taskq->name); 299 panic("usb_create_event_thread task"); 300 } 301 /* 302 * XXX we should make sure these threads are alive before 303 * end up using them in usb_doattach(). 304 */ 305 } 306 return 0; 307 } 308 309 static void 310 usb_doattach(device_t self) 311 { 312 struct usb_softc *sc = device_private(self); 313 struct usbd_device *dev; 314 usbd_status err; 315 int speed; 316 struct usb_event *ue; 317 318 DPRINTF(("usbd_doattach\n")); 319 320 sc->sc_bus->ub_usbctl = self; 321 sc->sc_port.up_power = USB_MAX_POWER; 322 323 switch (sc->sc_bus->ub_revision) { 324 case USBREV_1_0: 325 case USBREV_1_1: 326 speed = USB_SPEED_FULL; 327 break; 328 case USBREV_2_0: 329 speed = USB_SPEED_HIGH; 330 break; 331 case USBREV_3_0: 332 speed = USB_SPEED_SUPER; 333 break; 334 default: 335 panic("usb_doattach"); 336 } 337 338 cv_init(&sc->sc_bus->ub_needsexplore_cv, "usbevt"); 339 340 ue = usb_alloc_event(); 341 ue->u.ue_ctrlr.ue_bus = device_unit(self); 342 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 343 344 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 345 &sc->sc_port); 346 if (!err) { 347 dev = sc->sc_port.up_dev; 348 if (dev->ud_hub == NULL) { 349 sc->sc_dying = 1; 350 aprint_error("%s: root device is not a hub\n", 351 device_xname(self)); 352 return; 353 } 354 sc->sc_bus->ub_roothub = dev; 355 usb_create_event_thread(self); 356 #if 1 357 /* 358 * Turning this code off will delay attachment of USB devices 359 * until the USB event thread is running, which means that 360 * the keyboard will not work until after cold boot. 361 */ 362 if (cold && (device_cfdata(self)->cf_flags & 1)) 363 dev->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 364 #endif 365 } else { 366 aprint_error("%s: root hub problem, error=%s\n", 367 device_xname(self), usbd_errstr(err)); 368 sc->sc_dying = 1; 369 } 370 371 config_pending_incr(self); 372 373 if (!pmf_device_register(self, NULL, NULL)) 374 aprint_error_dev(self, "couldn't establish power handler\n"); 375 376 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 377 usb_async_intr, NULL); 378 379 return; 380 } 381 382 void 383 usb_create_event_thread(device_t self) 384 { 385 struct usb_softc *sc = device_private(self); 386 387 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 388 usb_event_thread, sc, &sc->sc_event_thread, 389 "%s", device_xname(self))) { 390 printf("%s: unable to create event thread for\n", 391 device_xname(self)); 392 panic("usb_create_event_thread"); 393 } 394 } 395 396 /* 397 * Add a task to be performed by the task thread. This function can be 398 * called from any context and the task will be executed in a process 399 * context ASAP. 400 */ 401 void 402 usb_add_task(struct usbd_device *dev, struct usb_task *task, int queue) 403 { 404 struct usb_taskq *taskq; 405 406 KASSERT(0 <= queue); 407 KASSERT(queue < USB_NUM_TASKQS); 408 taskq = &usb_taskq[queue]; 409 mutex_enter(&taskq->lock); 410 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 411 USB_NUM_TASKQS) { 412 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 413 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 414 cv_signal(&taskq->cv); 415 } else { 416 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 417 } 418 mutex_exit(&taskq->lock); 419 } 420 421 /* 422 * XXX This does not wait for completion! Most uses need such an 423 * operation. Urgh... 424 */ 425 void 426 usb_rem_task(struct usbd_device *dev, struct usb_task *task) 427 { 428 unsigned queue; 429 430 while ((queue = task->queue) != USB_NUM_TASKQS) { 431 struct usb_taskq *taskq = &usb_taskq[queue]; 432 mutex_enter(&taskq->lock); 433 if (__predict_true(task->queue == queue)) { 434 TAILQ_REMOVE(&taskq->tasks, task, next); 435 task->queue = USB_NUM_TASKQS; 436 mutex_exit(&taskq->lock); 437 break; 438 } 439 mutex_exit(&taskq->lock); 440 } 441 } 442 443 void 444 usb_event_thread(void *arg) 445 { 446 struct usb_softc *sc = arg; 447 448 DPRINTF(("usb_event_thread: start\n")); 449 450 /* 451 * In case this controller is a companion controller to an 452 * EHCI controller we need to wait until the EHCI controller 453 * has grabbed the port. 454 * XXX It would be nicer to do this with a tsleep(), but I don't 455 * know how to synchronize the creation of the threads so it 456 * will work. 457 */ 458 usb_delay_ms(sc->sc_bus, 500); 459 460 /* Make sure first discover does something. */ 461 mutex_enter(sc->sc_bus->ub_lock); 462 sc->sc_bus->ub_needsexplore = 1; 463 usb_discover(sc); 464 mutex_exit(sc->sc_bus->ub_lock); 465 config_pending_decr(sc->sc_bus->ub_usbctl); 466 467 mutex_enter(sc->sc_bus->ub_lock); 468 while (!sc->sc_dying) { 469 if (usb_noexplore < 2) 470 usb_discover(sc); 471 472 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 473 sc->sc_bus->ub_lock, usb_noexplore ? 0 : hz * 60); 474 475 DPRINTFN(2,("usb_event_thread: woke up\n")); 476 } 477 sc->sc_event_thread = NULL; 478 479 /* In case parent is waiting for us to exit. */ 480 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 481 mutex_exit(sc->sc_bus->ub_lock); 482 483 DPRINTF(("usb_event_thread: exit\n")); 484 kthread_exit(0); 485 } 486 487 void 488 usb_task_thread(void *arg) 489 { 490 struct usb_task *task; 491 struct usb_taskq *taskq; 492 bool mpsafe; 493 494 taskq = arg; 495 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 496 497 mutex_enter(&taskq->lock); 498 for (;;) { 499 task = TAILQ_FIRST(&taskq->tasks); 500 if (task == NULL) { 501 cv_wait(&taskq->cv, &taskq->lock); 502 task = TAILQ_FIRST(&taskq->tasks); 503 } 504 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 505 if (task != NULL) { 506 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 507 TAILQ_REMOVE(&taskq->tasks, task, next); 508 task->queue = USB_NUM_TASKQS; 509 mutex_exit(&taskq->lock); 510 511 if (!mpsafe) 512 KERNEL_LOCK(1, curlwp); 513 task->fun(task->arg); 514 /* Can't dereference task after this point. */ 515 if (!mpsafe) 516 KERNEL_UNLOCK_ONE(curlwp); 517 518 mutex_enter(&taskq->lock); 519 } 520 } 521 mutex_exit(&taskq->lock); 522 } 523 524 int 525 usbctlprint(void *aux, const char *pnp) 526 { 527 /* only "usb"es can attach to host controllers */ 528 if (pnp) 529 aprint_normal("usb at %s", pnp); 530 531 return UNCONF; 532 } 533 534 int 535 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 536 { 537 int unit = minor(dev); 538 struct usb_softc *sc; 539 540 if (unit == USB_DEV_MINOR) { 541 if (usb_dev_open) 542 return EBUSY; 543 usb_dev_open = 1; 544 mutex_enter(proc_lock); 545 usb_async_proc = 0; 546 mutex_exit(proc_lock); 547 return 0; 548 } 549 550 sc = device_lookup_private(&usb_cd, unit); 551 if (!sc) 552 return ENXIO; 553 554 if (sc->sc_dying) 555 return EIO; 556 557 return 0; 558 } 559 560 int 561 usbread(dev_t dev, struct uio *uio, int flag) 562 { 563 struct usb_event *ue; 564 #ifdef COMPAT_30 565 struct usb_event_old *ueo = NULL; /* XXXGCC */ 566 int useold = 0; 567 #endif 568 int error, n; 569 570 if (minor(dev) != USB_DEV_MINOR) 571 return ENXIO; 572 573 switch (uio->uio_resid) { 574 #ifdef COMPAT_30 575 case sizeof(struct usb_event_old): 576 ueo = kmem_zalloc(sizeof(struct usb_event_old), KM_SLEEP); 577 useold = 1; 578 /* FALLTHRU */ 579 #endif 580 case sizeof(struct usb_event): 581 ue = usb_alloc_event(); 582 break; 583 default: 584 return EINVAL; 585 } 586 587 error = 0; 588 mutex_enter(&usb_event_lock); 589 for (;;) { 590 n = usb_get_next_event(ue); 591 if (n != 0) 592 break; 593 if (flag & IO_NDELAY) { 594 error = EWOULDBLOCK; 595 break; 596 } 597 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 598 if (error) 599 break; 600 } 601 mutex_exit(&usb_event_lock); 602 if (!error) { 603 #ifdef COMPAT_30 604 if (useold) { /* copy fields to old struct */ 605 ueo->ue_type = ue->ue_type; 606 memcpy(&ueo->ue_time, &ue->ue_time, 607 sizeof(struct timespec)); 608 switch (ue->ue_type) { 609 case USB_EVENT_DEVICE_ATTACH: 610 case USB_EVENT_DEVICE_DETACH: 611 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 612 break; 613 614 case USB_EVENT_CTRLR_ATTACH: 615 case USB_EVENT_CTRLR_DETACH: 616 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 617 break; 618 619 case USB_EVENT_DRIVER_ATTACH: 620 case USB_EVENT_DRIVER_DETACH: 621 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 622 memcpy(ueo->u.ue_driver.ue_devname, 623 ue->u.ue_driver.ue_devname, 624 sizeof(ue->u.ue_driver.ue_devname)); 625 break; 626 default: 627 ; 628 } 629 630 error = uiomove((void *)ueo, sizeof *ueo, uio); 631 } else 632 #endif 633 error = uiomove((void *)ue, sizeof *ue, uio); 634 } 635 usb_free_event(ue); 636 #ifdef COMPAT_30 637 if (useold) 638 kmem_free(ueo, sizeof(struct usb_event_old)); 639 #endif 640 641 return error; 642 } 643 644 int 645 usbclose(dev_t dev, int flag, int mode, 646 struct lwp *l) 647 { 648 int unit = minor(dev); 649 650 if (unit == USB_DEV_MINOR) { 651 mutex_enter(proc_lock); 652 usb_async_proc = 0; 653 mutex_exit(proc_lock); 654 usb_dev_open = 0; 655 } 656 657 return 0; 658 } 659 660 int 661 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 662 { 663 struct usb_softc *sc; 664 int unit = minor(devt); 665 666 if (unit == USB_DEV_MINOR) { 667 switch (cmd) { 668 case FIONBIO: 669 /* All handled in the upper FS layer. */ 670 return 0; 671 672 case FIOASYNC: 673 mutex_enter(proc_lock); 674 if (*(int *)data) 675 usb_async_proc = l->l_proc; 676 else 677 usb_async_proc = 0; 678 mutex_exit(proc_lock); 679 return 0; 680 681 default: 682 return EINVAL; 683 } 684 } 685 686 sc = device_lookup_private(&usb_cd, unit); 687 688 if (sc->sc_dying) 689 return EIO; 690 691 switch (cmd) { 692 #ifdef USB_DEBUG 693 case USB_SETDEBUG: 694 if (!(flag & FWRITE)) 695 return EBADF; 696 usbdebug = ((*(int *)data) & 0x000000ff); 697 break; 698 #endif /* USB_DEBUG */ 699 case USB_REQUEST: 700 { 701 struct usb_ctl_request *ur = (void *)data; 702 int len = UGETW(ur->ucr_request.wLength); 703 struct iovec iov; 704 struct uio uio; 705 void *ptr = 0; 706 int addr = ur->ucr_addr; 707 usbd_status err; 708 int error = 0; 709 710 if (!(flag & FWRITE)) 711 return EBADF; 712 713 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 714 if (len < 0 || len > 32768) 715 return EINVAL; 716 if (addr < 0 || addr >= USB_MAX_DEVICES || 717 sc->sc_bus->ub_devices[addr] == NULL) 718 return EINVAL; 719 if (len != 0) { 720 iov.iov_base = (void *)ur->ucr_data; 721 iov.iov_len = len; 722 uio.uio_iov = &iov; 723 uio.uio_iovcnt = 1; 724 uio.uio_resid = len; 725 uio.uio_offset = 0; 726 uio.uio_rw = 727 ur->ucr_request.bmRequestType & UT_READ ? 728 UIO_READ : UIO_WRITE; 729 uio.uio_vmspace = l->l_proc->p_vmspace; 730 ptr = kmem_alloc(len, KM_SLEEP); 731 if (uio.uio_rw == UIO_WRITE) { 732 error = uiomove(ptr, len, &uio); 733 if (error) 734 goto ret; 735 } 736 } 737 err = usbd_do_request_flags(sc->sc_bus->ub_devices[addr], 738 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 739 USBD_DEFAULT_TIMEOUT); 740 if (err) { 741 error = EIO; 742 goto ret; 743 } 744 if (len > ur->ucr_actlen) 745 len = ur->ucr_actlen; 746 if (len != 0) { 747 if (uio.uio_rw == UIO_READ) { 748 error = uiomove(ptr, len, &uio); 749 if (error) 750 goto ret; 751 } 752 } 753 ret: 754 if (ptr) { 755 len = UGETW(ur->ucr_request.wLength); 756 kmem_free(ptr, len); 757 } 758 return error; 759 } 760 761 case USB_DEVICEINFO: 762 { 763 struct usbd_device *dev; 764 struct usb_device_info *di = (void *)data; 765 int addr = di->udi_addr; 766 767 if (addr < 0 || addr >= USB_MAX_DEVICES) 768 return EINVAL; 769 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 770 return ENXIO; 771 usbd_fill_deviceinfo(dev, di, 1); 772 break; 773 } 774 775 #ifdef COMPAT_30 776 case USB_DEVICEINFO_OLD: 777 { 778 struct usbd_device *dev; 779 struct usb_device_info_old *di = (void *)data; 780 int addr = di->udi_addr; 781 782 if (addr < 1 || addr >= USB_MAX_DEVICES) 783 return EINVAL; 784 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 785 return ENXIO; 786 usbd_fill_deviceinfo_old(dev, di, 1); 787 break; 788 } 789 #endif 790 791 case USB_DEVICESTATS: 792 *(struct usb_device_stats *)data = sc->sc_bus->ub_stats; 793 break; 794 795 default: 796 return EINVAL; 797 } 798 return 0; 799 } 800 801 int 802 usbpoll(dev_t dev, int events, struct lwp *l) 803 { 804 int revents, mask; 805 806 if (minor(dev) == USB_DEV_MINOR) { 807 revents = 0; 808 mask = POLLIN | POLLRDNORM; 809 810 mutex_enter(&usb_event_lock); 811 if (events & mask && usb_nevents > 0) 812 revents |= events & mask; 813 if (revents == 0 && events & mask) 814 selrecord(l, &usb_selevent); 815 mutex_exit(&usb_event_lock); 816 817 return revents; 818 } else { 819 return 0; 820 } 821 } 822 823 static void 824 filt_usbrdetach(struct knote *kn) 825 { 826 827 mutex_enter(&usb_event_lock); 828 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 829 mutex_exit(&usb_event_lock); 830 } 831 832 static int 833 filt_usbread(struct knote *kn, long hint) 834 { 835 836 if (usb_nevents == 0) 837 return 0; 838 839 kn->kn_data = sizeof(struct usb_event); 840 return 1; 841 } 842 843 static const struct filterops usbread_filtops = 844 { 1, NULL, filt_usbrdetach, filt_usbread }; 845 846 int 847 usbkqfilter(dev_t dev, struct knote *kn) 848 { 849 struct klist *klist; 850 851 switch (kn->kn_filter) { 852 case EVFILT_READ: 853 if (minor(dev) != USB_DEV_MINOR) 854 return 1; 855 klist = &usb_selevent.sel_klist; 856 kn->kn_fop = &usbread_filtops; 857 break; 858 859 default: 860 return EINVAL; 861 } 862 863 kn->kn_hook = NULL; 864 865 mutex_enter(&usb_event_lock); 866 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 867 mutex_exit(&usb_event_lock); 868 869 return 0; 870 } 871 872 /* Explore device tree from the root. */ 873 Static void 874 usb_discover(struct usb_softc *sc) 875 { 876 877 KASSERT(mutex_owned(sc->sc_bus->ub_lock)); 878 879 DPRINTFN(2,("usb_discover\n")); 880 if (usb_noexplore > 1) 881 return; 882 /* 883 * We need mutual exclusion while traversing the device tree, 884 * but this is guaranteed since this function is only called 885 * from the event thread for the controller. 886 * 887 * Also, we now have sc_bus->ub_lock held. 888 */ 889 while (sc->sc_bus->ub_needsexplore && !sc->sc_dying) { 890 sc->sc_bus->ub_needsexplore = 0; 891 mutex_exit(sc->sc_bus->ub_lock); 892 sc->sc_bus->ub_roothub->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 893 mutex_enter(sc->sc_bus->ub_lock); 894 } 895 } 896 897 void 898 usb_needs_explore(struct usbd_device *dev) 899 { 900 DPRINTFN(2,("usb_needs_explore\n")); 901 mutex_enter(dev->ud_bus->ub_lock); 902 dev->ud_bus->ub_needsexplore = 1; 903 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 904 mutex_exit(dev->ud_bus->ub_lock); 905 } 906 907 void 908 usb_needs_reattach(struct usbd_device *dev) 909 { 910 DPRINTFN(2,("usb_needs_reattach\n")); 911 mutex_enter(dev->ud_bus->ub_lock); 912 dev->ud_powersrc->up_reattach = 1; 913 dev->ud_bus->ub_needsexplore = 1; 914 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 915 mutex_exit(dev->ud_bus->ub_lock); 916 } 917 918 /* Called at with usb_event_lock held. */ 919 int 920 usb_get_next_event(struct usb_event *ue) 921 { 922 struct usb_event_q *ueq; 923 924 KASSERT(mutex_owned(&usb_event_lock)); 925 926 if (usb_nevents <= 0) 927 return 0; 928 ueq = SIMPLEQ_FIRST(&usb_events); 929 #ifdef DIAGNOSTIC 930 if (ueq == NULL) { 931 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 932 usb_nevents = 0; 933 return 0; 934 } 935 #endif 936 if (ue) 937 *ue = ueq->ue; 938 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 939 usb_free_event((struct usb_event *)(void *)ueq); 940 usb_nevents--; 941 return 1; 942 } 943 944 void 945 usbd_add_dev_event(int type, struct usbd_device *udev) 946 { 947 struct usb_event *ue = usb_alloc_event(); 948 949 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 950 usb_add_event(type, ue); 951 } 952 953 void 954 usbd_add_drv_event(int type, struct usbd_device *udev, device_t dev) 955 { 956 struct usb_event *ue = usb_alloc_event(); 957 958 ue->u.ue_driver.ue_cookie = udev->ud_cookie; 959 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 960 sizeof ue->u.ue_driver.ue_devname); 961 usb_add_event(type, ue); 962 } 963 964 Static struct usb_event * 965 usb_alloc_event(void) 966 { 967 /* Yes, this is right; we allocate enough so that we can use it later */ 968 return kmem_zalloc(sizeof(struct usb_event_q), KM_SLEEP); 969 } 970 971 Static void 972 usb_free_event(struct usb_event *uep) 973 { 974 kmem_free(uep, sizeof(struct usb_event_q)); 975 } 976 977 Static void 978 usb_add_event(int type, struct usb_event *uep) 979 { 980 struct usb_event_q *ueq; 981 struct timeval thetime; 982 983 microtime(&thetime); 984 /* Don't want to wait here with usb_event_lock held */ 985 ueq = (struct usb_event_q *)(void *)uep; 986 ueq->ue = *uep; 987 ueq->ue.ue_type = type; 988 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 989 990 mutex_enter(&usb_event_lock); 991 if (++usb_nevents >= USB_MAX_EVENTS) { 992 /* Too many queued events, drop an old one. */ 993 DPRINTFN(-1,("usb: event dropped\n")); 994 (void)usb_get_next_event(0); 995 } 996 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 997 cv_signal(&usb_event_cv); 998 selnotify(&usb_selevent, 0, 0); 999 if (usb_async_proc != NULL) { 1000 kpreempt_disable(); 1001 softint_schedule(usb_async_sih); 1002 kpreempt_enable(); 1003 } 1004 mutex_exit(&usb_event_lock); 1005 } 1006 1007 Static void 1008 usb_async_intr(void *cookie) 1009 { 1010 proc_t *proc; 1011 1012 mutex_enter(proc_lock); 1013 if ((proc = usb_async_proc) != NULL) 1014 psignal(proc, SIGIO); 1015 mutex_exit(proc_lock); 1016 } 1017 1018 Static void 1019 usb_soft_intr(void *arg) 1020 { 1021 struct usbd_bus *bus = arg; 1022 1023 mutex_enter(bus->ub_lock); 1024 bus->ub_methods->ubm_softint(bus); 1025 mutex_exit(bus->ub_lock); 1026 } 1027 1028 void 1029 usb_schedsoftintr(struct usbd_bus *bus) 1030 { 1031 1032 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->ub_usepolling)); 1033 1034 if (bus->ub_usepolling) { 1035 bus->ub_methods->ubm_softint(bus); 1036 } else { 1037 kpreempt_disable(); 1038 softint_schedule(bus->ub_soft); 1039 kpreempt_enable(); 1040 } 1041 } 1042 1043 int 1044 usb_activate(device_t self, enum devact act) 1045 { 1046 struct usb_softc *sc = device_private(self); 1047 1048 switch (act) { 1049 case DVACT_DEACTIVATE: 1050 sc->sc_dying = 1; 1051 return 0; 1052 default: 1053 return EOPNOTSUPP; 1054 } 1055 } 1056 1057 void 1058 usb_childdet(device_t self, device_t child) 1059 { 1060 int i; 1061 struct usb_softc *sc = device_private(self); 1062 struct usbd_device *dev; 1063 1064 if ((dev = sc->sc_port.up_dev) == NULL || dev->ud_subdevlen == 0) 1065 return; 1066 1067 for (i = 0; i < dev->ud_subdevlen; i++) 1068 if (dev->ud_subdevs[i] == child) 1069 dev->ud_subdevs[i] = NULL; 1070 } 1071 1072 int 1073 usb_detach(device_t self, int flags) 1074 { 1075 struct usb_softc *sc = device_private(self); 1076 struct usb_event *ue; 1077 int rc; 1078 1079 DPRINTF(("usb_detach: start\n")); 1080 1081 /* Make all devices disconnect. */ 1082 if (sc->sc_port.up_dev != NULL && 1083 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1084 return rc; 1085 1086 pmf_device_deregister(self); 1087 /* Kill off event thread. */ 1088 sc->sc_dying = 1; 1089 while (sc->sc_event_thread != NULL) { 1090 mutex_enter(sc->sc_bus->ub_lock); 1091 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 1092 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 1093 sc->sc_bus->ub_lock, hz * 60); 1094 mutex_exit(sc->sc_bus->ub_lock); 1095 } 1096 DPRINTF(("usb_detach: event thread dead\n")); 1097 1098 if (sc->sc_bus->ub_soft != NULL) { 1099 softint_disestablish(sc->sc_bus->ub_soft); 1100 sc->sc_bus->ub_soft = NULL; 1101 } 1102 1103 ue = usb_alloc_event(); 1104 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1105 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1106 1107 cv_destroy(&sc->sc_bus->ub_needsexplore_cv); 1108 1109 return 0; 1110 } 1111 1112 #ifdef COMPAT_30 1113 Static void 1114 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1115 const struct usb_device_info *ue) 1116 { 1117 const unsigned char *p; 1118 unsigned char *q; 1119 int i, n; 1120 1121 uo->udi_bus = ue->udi_bus; 1122 uo->udi_addr = ue->udi_addr; 1123 uo->udi_cookie = ue->udi_cookie; 1124 for (i = 0, p = (const unsigned char *)ue->udi_product, 1125 q = (unsigned char *)uo->udi_product; 1126 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1127 if (*p < 0x80) 1128 q[i++] = *p; 1129 else { 1130 q[i++] = '?'; 1131 if ((*p & 0xe0) == 0xe0) 1132 p++; 1133 p++; 1134 } 1135 } 1136 q[i] = 0; 1137 1138 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1139 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1140 if (* p < 0x80) 1141 q[i++] = *p; 1142 else { 1143 q[i++] = '?'; 1144 p++; 1145 if ((*p & 0xe0) == 0xe0) 1146 p++; 1147 } 1148 } 1149 q[i] = 0; 1150 1151 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1152 1153 uo->udi_productNo = ue->udi_productNo; 1154 uo->udi_vendorNo = ue->udi_vendorNo; 1155 uo->udi_releaseNo = ue->udi_releaseNo; 1156 uo->udi_class = ue->udi_class; 1157 uo->udi_subclass = ue->udi_subclass; 1158 uo->udi_protocol = ue->udi_protocol; 1159 uo->udi_config = ue->udi_config; 1160 uo->udi_speed = ue->udi_speed; 1161 uo->udi_power = ue->udi_power; 1162 uo->udi_nports = ue->udi_nports; 1163 1164 for (n=0; n<USB_MAX_DEVNAMES; n++) 1165 memcpy(uo->udi_devnames[n], 1166 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1167 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1168 } 1169 #endif 1170
Indexes created Mon Sep 29 18:09:42 GMT 2025