usb.c revision 1.159
1 /* $NetBSD: usb.c,v 1.159 2015/05/30 06:41:08 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 1.159 2015/05/30 06:41:08 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/malloc.h> 51 #include <sys/device.h> 52 #include <sys/kthread.h> 53 #include <sys/proc.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/poll.h> 57 #include <sys/select.h> 58 #include <sys/vnode.h> 59 #include <sys/signalvar.h> 60 #include <sys/intr.h> 61 #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 #ifndef USBHIST_SIZE 79 #define USBHIST_SIZE 50000 80 #endif 81 82 static struct kern_history_ent usbhistbuf[USBHIST_SIZE]; 83 USBHIST_DEFINE(usbhist) = KERNHIST_INITIALIZER(usbhist, usbhistbuf); 84 85 #endif 86 87 #define USB_DEV_MINOR 255 88 89 #ifdef USB_DEBUG 90 #define DPRINTF(x) if (usbdebug) printf x 91 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 92 int usbdebug = 0; 93 /* 94 * 0 - do usual exploration 95 * 1 - do not use timeout exploration 96 * >1 - do no exploration 97 */ 98 int usb_noexplore = 0; 99 100 SYSCTL_SETUP(sysctl_hw_usb_setup, "sysctl hw.usb setup") 101 { 102 int err; 103 const struct sysctlnode *rnode; 104 const struct sysctlnode *cnode; 105 106 err = sysctl_createv(clog, 0, NULL, &rnode, 107 CTLFLAG_PERMANENT, CTLTYPE_NODE, "usb", 108 SYSCTL_DESCR("usb global controls"), 109 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 110 111 if (err) 112 goto fail; 113 114 /* control debugging printfs */ 115 err = sysctl_createv(clog, 0, &rnode, &cnode, 116 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 117 "debug", SYSCTL_DESCR("Enable debugging output"), 118 NULL, 0, &usbdebug, sizeof(usbdebug), CTL_CREATE, CTL_EOL); 119 if (err) 120 goto fail; 121 122 return; 123 fail: 124 aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err); 125 } 126 127 #else 128 #define DPRINTF(x) 129 #define DPRINTFN(n,x) 130 #define usb_noexplore 0 131 #endif 132 133 struct usb_softc { 134 #if 0 135 device_t sc_dev; /* base device */ 136 #endif 137 usbd_bus_handle sc_bus; /* USB controller */ 138 struct usbd_port sc_port; /* dummy port for root hub */ 139 140 struct lwp *sc_event_thread; 141 142 char sc_dying; 143 }; 144 145 struct usb_taskq { 146 TAILQ_HEAD(, usb_task) tasks; 147 kmutex_t lock; 148 kcondvar_t cv; 149 struct lwp *task_thread_lwp; 150 const char *name; 151 }; 152 153 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 154 155 dev_type_open(usbopen); 156 dev_type_close(usbclose); 157 dev_type_read(usbread); 158 dev_type_ioctl(usbioctl); 159 dev_type_poll(usbpoll); 160 dev_type_kqfilter(usbkqfilter); 161 162 const struct cdevsw usb_cdevsw = { 163 .d_open = usbopen, 164 .d_close = usbclose, 165 .d_read = usbread, 166 .d_write = nowrite, 167 .d_ioctl = usbioctl, 168 .d_stop = nostop, 169 .d_tty = notty, 170 .d_poll = usbpoll, 171 .d_mmap = nommap, 172 .d_kqfilter = usbkqfilter, 173 .d_discard = nodiscard, 174 .d_flag = D_OTHER 175 }; 176 177 Static void usb_discover(struct usb_softc *); 178 Static void usb_create_event_thread(device_t); 179 Static void usb_event_thread(void *); 180 Static void usb_task_thread(void *); 181 182 #define USB_MAX_EVENTS 100 183 struct usb_event_q { 184 struct usb_event ue; 185 SIMPLEQ_ENTRY(usb_event_q) next; 186 }; 187 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 188 SIMPLEQ_HEAD_INITIALIZER(usb_events); 189 Static int usb_nevents = 0; 190 Static struct selinfo usb_selevent; 191 Static kmutex_t usb_event_lock; 192 Static kcondvar_t usb_event_cv; 193 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 194 Static void *usb_async_sih; 195 Static int usb_dev_open = 0; 196 Static struct usb_event *usb_alloc_event(void); 197 Static void usb_free_event(struct usb_event *); 198 Static void usb_add_event(int, struct usb_event *); 199 Static int usb_get_next_event(struct usb_event *); 200 Static void usb_async_intr(void *); 201 Static void usb_soft_intr(void *); 202 203 #ifdef COMPAT_30 204 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 205 #endif 206 207 Static const char *usbrev_str[] = USBREV_STR; 208 209 static int usb_match(device_t, cfdata_t, void *); 210 static void usb_attach(device_t, device_t, void *); 211 static int usb_detach(device_t, int); 212 static int usb_activate(device_t, enum devact); 213 static void usb_childdet(device_t, device_t); 214 static int usb_once_init(void); 215 static void usb_doattach(device_t); 216 217 extern struct cfdriver usb_cd; 218 219 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 220 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 221 DVF_DETACH_SHUTDOWN); 222 223 static const char *taskq_names[] = USB_TASKQ_NAMES; 224 225 int 226 usb_match(device_t parent, cfdata_t match, void *aux) 227 { 228 DPRINTF(("usbd_match\n")); 229 return (UMATCH_GENERIC); 230 } 231 232 void 233 usb_attach(device_t parent, device_t self, void *aux) 234 { 235 static ONCE_DECL(init_control); 236 struct usb_softc *sc = device_private(self); 237 int usbrev; 238 239 sc->sc_bus = aux; 240 usbrev = sc->sc_bus->usbrev; 241 242 aprint_naive("\n"); 243 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 244 switch (usbrev) { 245 case USBREV_1_0: 246 case USBREV_1_1: 247 case USBREV_2_0: 248 case USBREV_3_0: 249 break; 250 default: 251 aprint_error(", not supported\n"); 252 sc->sc_dying = 1; 253 return; 254 } 255 aprint_normal("\n"); 256 257 /* XXX we should have our own level */ 258 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 259 usb_soft_intr, sc->sc_bus); 260 if (sc->sc_bus->soft == NULL) { 261 aprint_error("%s: can't register softintr\n", 262 device_xname(self)); 263 sc->sc_dying = 1; 264 return; 265 } 266 267 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 268 KASSERT(sc->sc_bus->lock != NULL); 269 270 RUN_ONCE(&init_control, usb_once_init); 271 config_interrupts(self, usb_doattach); 272 } 273 274 static int 275 usb_once_init(void) 276 { 277 struct usb_taskq *taskq; 278 int i; 279 280 USBHIST_LINK_STATIC(usbhist); 281 282 selinit(&usb_selevent); 283 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 284 cv_init(&usb_event_cv, "usbrea"); 285 286 for (i = 0; i < USB_NUM_TASKQS; i++) { 287 taskq = &usb_taskq[i]; 288 289 TAILQ_INIT(&taskq->tasks); 290 /* 291 * Since USB task methods usb_{add,rem}_task are callable 292 * from any context, we have to make this lock a spinlock. 293 */ 294 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 295 cv_init(&taskq->cv, "usbtsk"); 296 taskq->name = taskq_names[i]; 297 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 298 usb_task_thread, taskq, &taskq->task_thread_lwp, 299 "%s", taskq->name)) { 300 printf("unable to create task thread: %s\n", taskq->name); 301 panic("usb_create_event_thread task"); 302 } 303 /* 304 * XXX we should make sure these threads are alive before 305 * end up using them in usb_doattach(). 306 */ 307 } 308 return 0; 309 } 310 311 static void 312 usb_doattach(device_t self) 313 { 314 struct usb_softc *sc = device_private(self); 315 usbd_device_handle dev; 316 usbd_status err; 317 int speed; 318 struct usb_event *ue; 319 320 DPRINTF(("usbd_doattach\n")); 321 322 sc->sc_bus->usbctl = self; 323 sc->sc_port.power = USB_MAX_POWER; 324 325 switch (sc->sc_bus->usbrev) { 326 case USBREV_1_0: 327 case USBREV_1_1: 328 speed = USB_SPEED_FULL; 329 break; 330 case USBREV_2_0: 331 speed = USB_SPEED_HIGH; 332 break; 333 case USBREV_3_0: 334 speed = USB_SPEED_SUPER; 335 break; 336 default: 337 panic("usb_doattach"); 338 } 339 340 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 341 342 ue = usb_alloc_event(); 343 ue->u.ue_ctrlr.ue_bus = device_unit(self); 344 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 345 346 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 347 &sc->sc_port); 348 if (!err) { 349 dev = sc->sc_port.device; 350 if (dev->hub == NULL) { 351 sc->sc_dying = 1; 352 aprint_error("%s: root device is not a hub\n", 353 device_xname(self)); 354 return; 355 } 356 sc->sc_bus->root_hub = dev; 357 usb_create_event_thread(self); 358 #if 1 359 /* 360 * Turning this code off will delay attachment of USB devices 361 * until the USB event thread is running, which means that 362 * the keyboard will not work until after cold boot. 363 */ 364 if (cold && (device_cfdata(self)->cf_flags & 1)) 365 dev->hub->explore(sc->sc_bus->root_hub); 366 #endif 367 } else { 368 aprint_error("%s: root hub problem, error=%s\n", 369 device_xname(self), usbd_errstr(err)); 370 sc->sc_dying = 1; 371 } 372 373 config_pending_incr(self); 374 375 if (!pmf_device_register(self, NULL, NULL)) 376 aprint_error_dev(self, "couldn't establish power handler\n"); 377 378 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 379 usb_async_intr, NULL); 380 381 return; 382 } 383 384 void 385 usb_create_event_thread(device_t self) 386 { 387 struct usb_softc *sc = device_private(self); 388 389 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 390 usb_event_thread, sc, &sc->sc_event_thread, 391 "%s", device_xname(self))) { 392 printf("%s: unable to create event thread for\n", 393 device_xname(self)); 394 panic("usb_create_event_thread"); 395 } 396 } 397 398 /* 399 * Add a task to be performed by the task thread. This function can be 400 * called from any context and the task will be executed in a process 401 * context ASAP. 402 */ 403 void 404 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 405 { 406 struct usb_taskq *taskq; 407 408 KASSERT(0 <= queue); 409 KASSERT(queue < USB_NUM_TASKQS); 410 taskq = &usb_taskq[queue]; 411 mutex_enter(&taskq->lock); 412 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 413 USB_NUM_TASKQS) { 414 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 415 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 416 cv_signal(&taskq->cv); 417 } else { 418 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 419 } 420 mutex_exit(&taskq->lock); 421 } 422 423 /* 424 * XXX This does not wait for completion! Most uses need such an 425 * operation. Urgh... 426 */ 427 void 428 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 429 { 430 unsigned queue; 431 432 while ((queue = task->queue) != USB_NUM_TASKQS) { 433 struct usb_taskq *taskq = &usb_taskq[queue]; 434 mutex_enter(&taskq->lock); 435 if (__predict_true(task->queue == queue)) { 436 TAILQ_REMOVE(&taskq->tasks, task, next); 437 task->queue = USB_NUM_TASKQS; 438 mutex_exit(&taskq->lock); 439 break; 440 } 441 mutex_exit(&taskq->lock); 442 } 443 } 444 445 void 446 usb_event_thread(void *arg) 447 { 448 struct usb_softc *sc = arg; 449 450 DPRINTF(("usb_event_thread: start\n")); 451 452 /* 453 * In case this controller is a companion controller to an 454 * EHCI controller we need to wait until the EHCI controller 455 * has grabbed the port. 456 * XXX It would be nicer to do this with a tsleep(), but I don't 457 * know how to synchronize the creation of the threads so it 458 * will work. 459 */ 460 usb_delay_ms(sc->sc_bus, 500); 461 462 /* Make sure first discover does something. */ 463 mutex_enter(sc->sc_bus->lock); 464 sc->sc_bus->needs_explore = 1; 465 usb_discover(sc); 466 mutex_exit(sc->sc_bus->lock); 467 config_pending_decr(sc->sc_bus->usbctl); 468 469 mutex_enter(sc->sc_bus->lock); 470 while (!sc->sc_dying) { 471 if (usb_noexplore < 2) 472 usb_discover(sc); 473 474 cv_timedwait(&sc->sc_bus->needs_explore_cv, 475 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 476 477 DPRINTFN(2,("usb_event_thread: woke up\n")); 478 } 479 sc->sc_event_thread = NULL; 480 481 /* In case parent is waiting for us to exit. */ 482 cv_signal(&sc->sc_bus->needs_explore_cv); 483 mutex_exit(sc->sc_bus->lock); 484 485 DPRINTF(("usb_event_thread: exit\n")); 486 kthread_exit(0); 487 } 488 489 void 490 usb_task_thread(void *arg) 491 { 492 struct usb_task *task; 493 struct usb_taskq *taskq; 494 bool mpsafe; 495 496 taskq = arg; 497 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 498 499 mutex_enter(&taskq->lock); 500 for (;;) { 501 task = TAILQ_FIRST(&taskq->tasks); 502 if (task == NULL) { 503 cv_wait(&taskq->cv, &taskq->lock); 504 task = TAILQ_FIRST(&taskq->tasks); 505 } 506 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 507 if (task != NULL) { 508 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 509 TAILQ_REMOVE(&taskq->tasks, task, next); 510 task->queue = USB_NUM_TASKQS; 511 mutex_exit(&taskq->lock); 512 513 if (!mpsafe) 514 KERNEL_LOCK(1, curlwp); 515 task->fun(task->arg); 516 /* Can't dereference task after this point. */ 517 if (!mpsafe) 518 KERNEL_UNLOCK_ONE(curlwp); 519 520 mutex_enter(&taskq->lock); 521 } 522 } 523 mutex_exit(&taskq->lock); 524 } 525 526 int 527 usbctlprint(void *aux, const char *pnp) 528 { 529 /* only "usb"es can attach to host controllers */ 530 if (pnp) 531 aprint_normal("usb at %s", pnp); 532 533 return (UNCONF); 534 } 535 536 int 537 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 538 { 539 int unit = minor(dev); 540 struct usb_softc *sc; 541 542 if (unit == USB_DEV_MINOR) { 543 if (usb_dev_open) 544 return (EBUSY); 545 usb_dev_open = 1; 546 mutex_enter(proc_lock); 547 usb_async_proc = 0; 548 mutex_exit(proc_lock); 549 return (0); 550 } 551 552 sc = device_lookup_private(&usb_cd, unit); 553 if (!sc) 554 return (ENXIO); 555 556 if (sc->sc_dying) 557 return (EIO); 558 559 return (0); 560 } 561 562 int 563 usbread(dev_t dev, struct uio *uio, int flag) 564 { 565 struct usb_event *ue; 566 #ifdef COMPAT_30 567 struct usb_event_old *ueo = NULL; /* XXXGCC */ 568 int useold = 0; 569 #endif 570 int error, n; 571 572 if (minor(dev) != USB_DEV_MINOR) 573 return (ENXIO); 574 575 switch (uio->uio_resid) { 576 #ifdef COMPAT_30 577 case sizeof(struct usb_event_old): 578 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 579 M_WAITOK|M_ZERO); 580 useold = 1; 581 /* FALLTHRU */ 582 #endif 583 case sizeof(struct usb_event): 584 ue = usb_alloc_event(); 585 break; 586 default: 587 return (EINVAL); 588 } 589 590 error = 0; 591 mutex_enter(&usb_event_lock); 592 for (;;) { 593 n = usb_get_next_event(ue); 594 if (n != 0) 595 break; 596 if (flag & IO_NDELAY) { 597 error = EWOULDBLOCK; 598 break; 599 } 600 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 601 if (error) 602 break; 603 } 604 mutex_exit(&usb_event_lock); 605 if (!error) { 606 #ifdef COMPAT_30 607 if (useold) { /* copy fields to old struct */ 608 ueo->ue_type = ue->ue_type; 609 memcpy(&ueo->ue_time, &ue->ue_time, 610 sizeof(struct timespec)); 611 switch (ue->ue_type) { 612 case USB_EVENT_DEVICE_ATTACH: 613 case USB_EVENT_DEVICE_DETACH: 614 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 615 break; 616 617 case USB_EVENT_CTRLR_ATTACH: 618 case USB_EVENT_CTRLR_DETACH: 619 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 620 break; 621 622 case USB_EVENT_DRIVER_ATTACH: 623 case USB_EVENT_DRIVER_DETACH: 624 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 625 memcpy(ueo->u.ue_driver.ue_devname, 626 ue->u.ue_driver.ue_devname, 627 sizeof(ue->u.ue_driver.ue_devname)); 628 break; 629 default: 630 ; 631 } 632 633 error = uiomove((void *)ueo, sizeof *ueo, uio); 634 } else 635 #endif 636 error = uiomove((void *)ue, sizeof *ue, uio); 637 } 638 usb_free_event(ue); 639 #ifdef COMPAT_30 640 if (useold) 641 free(ueo, M_USBDEV); 642 #endif 643 644 return (error); 645 } 646 647 int 648 usbclose(dev_t dev, int flag, int mode, 649 struct lwp *l) 650 { 651 int unit = minor(dev); 652 653 if (unit == USB_DEV_MINOR) { 654 mutex_enter(proc_lock); 655 usb_async_proc = 0; 656 mutex_exit(proc_lock); 657 usb_dev_open = 0; 658 } 659 660 return (0); 661 } 662 663 int 664 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 665 { 666 struct usb_softc *sc; 667 int unit = minor(devt); 668 669 if (unit == USB_DEV_MINOR) { 670 switch (cmd) { 671 case FIONBIO: 672 /* All handled in the upper FS layer. */ 673 return (0); 674 675 case FIOASYNC: 676 mutex_enter(proc_lock); 677 if (*(int *)data) 678 usb_async_proc = l->l_proc; 679 else 680 usb_async_proc = 0; 681 mutex_exit(proc_lock); 682 return (0); 683 684 default: 685 return (EINVAL); 686 } 687 } 688 689 sc = device_lookup_private(&usb_cd, unit); 690 691 if (sc->sc_dying) 692 return (EIO); 693 694 switch (cmd) { 695 #ifdef USB_DEBUG 696 case USB_SETDEBUG: 697 if (!(flag & FWRITE)) 698 return (EBADF); 699 usbdebug = ((*(int *)data) & 0x000000ff); 700 break; 701 #endif /* USB_DEBUG */ 702 case USB_REQUEST: 703 { 704 struct usb_ctl_request *ur = (void *)data; 705 int len = UGETW(ur->ucr_request.wLength); 706 struct iovec iov; 707 struct uio uio; 708 void *ptr = 0; 709 int addr = ur->ucr_addr; 710 usbd_status err; 711 int error = 0; 712 713 if (!(flag & FWRITE)) 714 return (EBADF); 715 716 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 717 if (len < 0 || len > 32768) 718 return (EINVAL); 719 if (addr < 0 || addr >= USB_MAX_DEVICES || 720 sc->sc_bus->devices[addr] == NULL) 721 return (EINVAL); 722 if (len != 0) { 723 iov.iov_base = (void *)ur->ucr_data; 724 iov.iov_len = len; 725 uio.uio_iov = &iov; 726 uio.uio_iovcnt = 1; 727 uio.uio_resid = len; 728 uio.uio_offset = 0; 729 uio.uio_rw = 730 ur->ucr_request.bmRequestType & UT_READ ? 731 UIO_READ : UIO_WRITE; 732 uio.uio_vmspace = l->l_proc->p_vmspace; 733 ptr = malloc(len, M_TEMP, M_WAITOK); 734 if (uio.uio_rw == UIO_WRITE) { 735 error = uiomove(ptr, len, &uio); 736 if (error) 737 goto ret; 738 } 739 } 740 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 741 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 742 USBD_DEFAULT_TIMEOUT); 743 if (err) { 744 error = EIO; 745 goto ret; 746 } 747 if (len > ur->ucr_actlen) 748 len = ur->ucr_actlen; 749 if (len != 0) { 750 if (uio.uio_rw == UIO_READ) { 751 error = uiomove(ptr, len, &uio); 752 if (error) 753 goto ret; 754 } 755 } 756 ret: 757 if (ptr) 758 free(ptr, M_TEMP); 759 return (error); 760 } 761 762 case USB_DEVICEINFO: 763 { 764 usbd_device_handle dev; 765 struct usb_device_info *di = (void *)data; 766 int addr = di->udi_addr; 767 768 if (addr < 0 || addr >= USB_MAX_DEVICES) 769 return EINVAL; 770 if ((dev = sc->sc_bus->devices[addr]) == NULL) 771 return ENXIO; 772 usbd_fill_deviceinfo(dev, di, 1); 773 break; 774 } 775 776 #ifdef COMPAT_30 777 case USB_DEVICEINFO_OLD: 778 { 779 usbd_device_handle dev; 780 struct usb_device_info_old *di = (void *)data; 781 int addr = di->udi_addr; 782 783 if (addr < 1 || addr >= USB_MAX_DEVICES) 784 return EINVAL; 785 if ((dev = sc->sc_bus->devices[addr]) == NULL) 786 return ENXIO; 787 usbd_fill_deviceinfo_old(dev, di, 1); 788 break; 789 } 790 #endif 791 792 case USB_DEVICESTATS: 793 *(struct usb_device_stats *)data = sc->sc_bus->stats; 794 break; 795 796 default: 797 return (EINVAL); 798 } 799 return (0); 800 } 801 802 int 803 usbpoll(dev_t dev, int events, struct lwp *l) 804 { 805 int revents, mask; 806 807 if (minor(dev) == USB_DEV_MINOR) { 808 revents = 0; 809 mask = POLLIN | POLLRDNORM; 810 811 mutex_enter(&usb_event_lock); 812 if (events & mask && usb_nevents > 0) 813 revents |= events & mask; 814 if (revents == 0 && events & mask) 815 selrecord(l, &usb_selevent); 816 mutex_exit(&usb_event_lock); 817 818 return (revents); 819 } else { 820 return (0); 821 } 822 } 823 824 static void 825 filt_usbrdetach(struct knote *kn) 826 { 827 828 mutex_enter(&usb_event_lock); 829 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 830 mutex_exit(&usb_event_lock); 831 } 832 833 static int 834 filt_usbread(struct knote *kn, long hint) 835 { 836 837 if (usb_nevents == 0) 838 return (0); 839 840 kn->kn_data = sizeof(struct usb_event); 841 return (1); 842 } 843 844 static const struct filterops usbread_filtops = 845 { 1, NULL, filt_usbrdetach, filt_usbread }; 846 847 int 848 usbkqfilter(dev_t dev, struct knote *kn) 849 { 850 struct klist *klist; 851 852 switch (kn->kn_filter) { 853 case EVFILT_READ: 854 if (minor(dev) != USB_DEV_MINOR) 855 return (1); 856 klist = &usb_selevent.sel_klist; 857 kn->kn_fop = &usbread_filtops; 858 break; 859 860 default: 861 return (EINVAL); 862 } 863 864 kn->kn_hook = NULL; 865 866 mutex_enter(&usb_event_lock); 867 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 868 mutex_exit(&usb_event_lock); 869 870 return (0); 871 } 872 873 /* Explore device tree from the root. */ 874 Static void 875 usb_discover(struct usb_softc *sc) 876 { 877 878 KASSERT(mutex_owned(sc->sc_bus->lock)); 879 880 DPRINTFN(2,("usb_discover\n")); 881 if (usb_noexplore > 1) 882 return; 883 /* 884 * We need mutual exclusion while traversing the device tree, 885 * but this is guaranteed since this function is only called 886 * from the event thread for the controller. 887 * 888 * Also, we now have sc_bus->lock held. 889 */ 890 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 891 sc->sc_bus->needs_explore = 0; 892 mutex_exit(sc->sc_bus->lock); 893 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 894 mutex_enter(sc->sc_bus->lock); 895 } 896 } 897 898 void 899 usb_needs_explore(usbd_device_handle dev) 900 { 901 DPRINTFN(2,("usb_needs_explore\n")); 902 mutex_enter(dev->bus->lock); 903 dev->bus->needs_explore = 1; 904 cv_signal(&dev->bus->needs_explore_cv); 905 mutex_exit(dev->bus->lock); 906 } 907 908 void 909 usb_needs_reattach(usbd_device_handle dev) 910 { 911 DPRINTFN(2,("usb_needs_reattach\n")); 912 mutex_enter(dev->bus->lock); 913 dev->powersrc->reattach = 1; 914 dev->bus->needs_explore = 1; 915 cv_signal(&dev->bus->needs_explore_cv); 916 mutex_exit(dev->bus->lock); 917 } 918 919 /* Called at with usb_event_lock held. */ 920 int 921 usb_get_next_event(struct usb_event *ue) 922 { 923 struct usb_event_q *ueq; 924 925 KASSERT(mutex_owned(&usb_event_lock)); 926 927 if (usb_nevents <= 0) 928 return (0); 929 ueq = SIMPLEQ_FIRST(&usb_events); 930 #ifdef DIAGNOSTIC 931 if (ueq == NULL) { 932 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 933 usb_nevents = 0; 934 return (0); 935 } 936 #endif 937 if (ue) 938 *ue = ueq->ue; 939 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 940 usb_free_event((struct usb_event *)(void *)ueq); 941 usb_nevents--; 942 return (1); 943 } 944 945 void 946 usbd_add_dev_event(int type, usbd_device_handle udev) 947 { 948 struct usb_event *ue = usb_alloc_event(); 949 950 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 951 usb_add_event(type, ue); 952 } 953 954 void 955 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 956 { 957 struct usb_event *ue = usb_alloc_event(); 958 959 ue->u.ue_driver.ue_cookie = udev->cookie; 960 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 961 sizeof ue->u.ue_driver.ue_devname); 962 usb_add_event(type, ue); 963 } 964 965 Static struct usb_event * 966 usb_alloc_event(void) 967 { 968 /* Yes, this is right; we allocate enough so that we can use it later */ 969 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 970 } 971 972 Static void 973 usb_free_event(struct usb_event *uep) 974 { 975 free(uep, M_USBDEV); 976 } 977 978 Static void 979 usb_add_event(int type, struct usb_event *uep) 980 { 981 struct usb_event_q *ueq; 982 struct timeval thetime; 983 984 microtime(&thetime); 985 /* Don't want to wait here with usb_event_lock held */ 986 ueq = (struct usb_event_q *)(void *)uep; 987 ueq->ue = *uep; 988 ueq->ue.ue_type = type; 989 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 990 991 mutex_enter(&usb_event_lock); 992 if (++usb_nevents >= USB_MAX_EVENTS) { 993 /* Too many queued events, drop an old one. */ 994 DPRINTFN(-1,("usb: event dropped\n")); 995 (void)usb_get_next_event(0); 996 } 997 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 998 cv_signal(&usb_event_cv); 999 selnotify(&usb_selevent, 0, 0); 1000 if (usb_async_proc != NULL) { 1001 kpreempt_disable(); 1002 softint_schedule(usb_async_sih); 1003 kpreempt_enable(); 1004 } 1005 mutex_exit(&usb_event_lock); 1006 } 1007 1008 Static void 1009 usb_async_intr(void *cookie) 1010 { 1011 proc_t *proc; 1012 1013 mutex_enter(proc_lock); 1014 if ((proc = usb_async_proc) != NULL) 1015 psignal(proc, SIGIO); 1016 mutex_exit(proc_lock); 1017 } 1018 1019 Static void 1020 usb_soft_intr(void *arg) 1021 { 1022 usbd_bus_handle bus = arg; 1023 1024 mutex_enter(bus->lock); 1025 (*bus->methods->soft_intr)(bus); 1026 mutex_exit(bus->lock); 1027 } 1028 1029 void 1030 usb_schedsoftintr(usbd_bus_handle bus) 1031 { 1032 1033 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 1034 1035 if (bus->use_polling) { 1036 bus->methods->soft_intr(bus); 1037 } else { 1038 kpreempt_disable(); 1039 softint_schedule(bus->soft); 1040 kpreempt_enable(); 1041 } 1042 } 1043 1044 int 1045 usb_activate(device_t self, enum devact act) 1046 { 1047 struct usb_softc *sc = device_private(self); 1048 1049 switch (act) { 1050 case DVACT_DEACTIVATE: 1051 sc->sc_dying = 1; 1052 return 0; 1053 default: 1054 return EOPNOTSUPP; 1055 } 1056 } 1057 1058 void 1059 usb_childdet(device_t self, device_t child) 1060 { 1061 int i; 1062 struct usb_softc *sc = device_private(self); 1063 struct usbd_device *dev; 1064 1065 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1066 return; 1067 1068 for (i = 0; i < dev->subdevlen; i++) 1069 if (dev->subdevs[i] == child) 1070 dev->subdevs[i] = NULL; 1071 } 1072 1073 int 1074 usb_detach(device_t self, int flags) 1075 { 1076 struct usb_softc *sc = device_private(self); 1077 struct usb_event *ue; 1078 int rc; 1079 1080 DPRINTF(("usb_detach: start\n")); 1081 1082 /* Make all devices disconnect. */ 1083 if (sc->sc_port.device != NULL && 1084 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1085 return rc; 1086 1087 pmf_device_deregister(self); 1088 /* Kill off event thread. */ 1089 sc->sc_dying = 1; 1090 while (sc->sc_event_thread != NULL) { 1091 mutex_enter(sc->sc_bus->lock); 1092 cv_signal(&sc->sc_bus->needs_explore_cv); 1093 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1094 sc->sc_bus->lock, hz * 60); 1095 mutex_exit(sc->sc_bus->lock); 1096 } 1097 DPRINTF(("usb_detach: event thread dead\n")); 1098 1099 if (sc->sc_bus->soft != NULL) { 1100 softint_disestablish(sc->sc_bus->soft); 1101 sc->sc_bus->soft = NULL; 1102 } 1103 1104 ue = usb_alloc_event(); 1105 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1106 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1107 1108 cv_destroy(&sc->sc_bus->needs_explore_cv); 1109 1110 return (0); 1111 } 1112 1113 #ifdef COMPAT_30 1114 Static void 1115 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1116 const struct usb_device_info *ue) 1117 { 1118 const unsigned char *p; 1119 unsigned char *q; 1120 int i, n; 1121 1122 uo->udi_bus = ue->udi_bus; 1123 uo->udi_addr = ue->udi_addr; 1124 uo->udi_cookie = ue->udi_cookie; 1125 for (i = 0, p = (const unsigned char *)ue->udi_product, 1126 q = (unsigned char *)uo->udi_product; 1127 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1128 if (*p < 0x80) 1129 q[i++] = *p; 1130 else { 1131 q[i++] = '?'; 1132 if ((*p & 0xe0) == 0xe0) 1133 p++; 1134 p++; 1135 } 1136 } 1137 q[i] = 0; 1138 1139 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1140 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1141 if (* p < 0x80) 1142 q[i++] = *p; 1143 else { 1144 q[i++] = '?'; 1145 p++; 1146 if ((*p & 0xe0) == 0xe0) 1147 p++; 1148 } 1149 } 1150 q[i] = 0; 1151 1152 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1153 1154 uo->udi_productNo = ue->udi_productNo; 1155 uo->udi_vendorNo = ue->udi_vendorNo; 1156 uo->udi_releaseNo = ue->udi_releaseNo; 1157 uo->udi_class = ue->udi_class; 1158 uo->udi_subclass = ue->udi_subclass; 1159 uo->udi_protocol = ue->udi_protocol; 1160 uo->udi_config = ue->udi_config; 1161 uo->udi_speed = ue->udi_speed; 1162 uo->udi_power = ue->udi_power; 1163 uo->udi_nports = ue->udi_nports; 1164 1165 for (n=0; n<USB_MAX_DEVNAMES; n++) 1166 memcpy(uo->udi_devnames[n], 1167 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1168 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1169 } 1170 #endif 1171
Indexes created Tue Sep 23 23:09:58 GMT 2025