usb.c revision 1.156.2.2
1 /* $NetBSD: usb.c,v 1.156.2.2 2014/12/03 12:52:07 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 1.156.2.2 2014/12/03 12:52:07 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 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 usbd_bus_handle 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 usbd_device_handle 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(usbd_device_handle 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(usbd_device_handle 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 = malloc(sizeof(struct usb_event_old), M_USBDEV, 577 M_WAITOK|M_ZERO); 578 useold = 1; 579 /* FALLTHRU */ 580 #endif 581 case sizeof(struct usb_event): 582 ue = usb_alloc_event(); 583 break; 584 default: 585 return (EINVAL); 586 } 587 588 error = 0; 589 mutex_enter(&usb_event_lock); 590 for (;;) { 591 n = usb_get_next_event(ue); 592 if (n != 0) 593 break; 594 if (flag & IO_NDELAY) { 595 error = EWOULDBLOCK; 596 break; 597 } 598 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 599 if (error) 600 break; 601 } 602 mutex_exit(&usb_event_lock); 603 if (!error) { 604 #ifdef COMPAT_30 605 if (useold) { /* copy fields to old struct */ 606 ueo->ue_type = ue->ue_type; 607 memcpy(&ueo->ue_time, &ue->ue_time, 608 sizeof(struct timespec)); 609 switch (ue->ue_type) { 610 case USB_EVENT_DEVICE_ATTACH: 611 case USB_EVENT_DEVICE_DETACH: 612 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 613 break; 614 615 case USB_EVENT_CTRLR_ATTACH: 616 case USB_EVENT_CTRLR_DETACH: 617 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 618 break; 619 620 case USB_EVENT_DRIVER_ATTACH: 621 case USB_EVENT_DRIVER_DETACH: 622 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 623 memcpy(ueo->u.ue_driver.ue_devname, 624 ue->u.ue_driver.ue_devname, 625 sizeof(ue->u.ue_driver.ue_devname)); 626 break; 627 default: 628 ; 629 } 630 631 error = uiomove((void *)ueo, sizeof *ueo, uio); 632 } else 633 #endif 634 error = uiomove((void *)ue, sizeof *ue, uio); 635 } 636 usb_free_event(ue); 637 #ifdef COMPAT_30 638 if (useold) 639 free(ueo, M_USBDEV); 640 #endif 641 642 return (error); 643 } 644 645 int 646 usbclose(dev_t dev, int flag, int mode, 647 struct lwp *l) 648 { 649 int unit = minor(dev); 650 651 if (unit == USB_DEV_MINOR) { 652 mutex_enter(proc_lock); 653 usb_async_proc = 0; 654 mutex_exit(proc_lock); 655 usb_dev_open = 0; 656 } 657 658 return (0); 659 } 660 661 int 662 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 663 { 664 struct usb_softc *sc; 665 int unit = minor(devt); 666 667 if (unit == USB_DEV_MINOR) { 668 switch (cmd) { 669 case FIONBIO: 670 /* All handled in the upper FS layer. */ 671 return (0); 672 673 case FIOASYNC: 674 mutex_enter(proc_lock); 675 if (*(int *)data) 676 usb_async_proc = l->l_proc; 677 else 678 usb_async_proc = 0; 679 mutex_exit(proc_lock); 680 return (0); 681 682 default: 683 return (EINVAL); 684 } 685 } 686 687 sc = device_lookup_private(&usb_cd, unit); 688 689 if (sc->sc_dying) 690 return (EIO); 691 692 switch (cmd) { 693 #ifdef USB_DEBUG 694 case USB_SETDEBUG: 695 if (!(flag & FWRITE)) 696 return (EBADF); 697 usbdebug = ((*(int *)data) & 0x000000ff); 698 break; 699 #endif /* USB_DEBUG */ 700 case USB_REQUEST: 701 { 702 struct usb_ctl_request *ur = (void *)data; 703 int len = UGETW(ur->ucr_request.wLength); 704 struct iovec iov; 705 struct uio uio; 706 void *ptr = 0; 707 int addr = ur->ucr_addr; 708 usbd_status err; 709 int error = 0; 710 711 if (!(flag & FWRITE)) 712 return (EBADF); 713 714 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 715 if (len < 0 || len > 32768) 716 return (EINVAL); 717 if (addr < 0 || addr >= USB_MAX_DEVICES || 718 sc->sc_bus->ub_devices[addr] == NULL) 719 return (EINVAL); 720 if (len != 0) { 721 iov.iov_base = (void *)ur->ucr_data; 722 iov.iov_len = len; 723 uio.uio_iov = &iov; 724 uio.uio_iovcnt = 1; 725 uio.uio_resid = len; 726 uio.uio_offset = 0; 727 uio.uio_rw = 728 ur->ucr_request.bmRequestType & UT_READ ? 729 UIO_READ : UIO_WRITE; 730 uio.uio_vmspace = l->l_proc->p_vmspace; 731 ptr = malloc(len, M_TEMP, M_WAITOK); 732 if (uio.uio_rw == UIO_WRITE) { 733 error = uiomove(ptr, len, &uio); 734 if (error) 735 goto ret; 736 } 737 } 738 err = usbd_do_request_flags(sc->sc_bus->ub_devices[addr], 739 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 740 USBD_DEFAULT_TIMEOUT); 741 if (err) { 742 error = EIO; 743 goto ret; 744 } 745 if (len > ur->ucr_actlen) 746 len = ur->ucr_actlen; 747 if (len != 0) { 748 if (uio.uio_rw == UIO_READ) { 749 error = uiomove(ptr, len, &uio); 750 if (error) 751 goto ret; 752 } 753 } 754 ret: 755 if (ptr) 756 free(ptr, M_TEMP); 757 return (error); 758 } 759 760 case USB_DEVICEINFO: 761 { 762 usbd_device_handle dev; 763 struct usb_device_info *di = (void *)data; 764 int addr = di->udi_addr; 765 766 if (addr < 0 || addr >= USB_MAX_DEVICES) 767 return EINVAL; 768 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 769 return ENXIO; 770 usbd_fill_deviceinfo(dev, di, 1); 771 break; 772 } 773 774 #ifdef COMPAT_30 775 case USB_DEVICEINFO_OLD: 776 { 777 usbd_device_handle dev; 778 struct usb_device_info_old *di = (void *)data; 779 int addr = di->udi_addr; 780 781 if (addr < 1 || addr >= USB_MAX_DEVICES) 782 return EINVAL; 783 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 784 return ENXIO; 785 usbd_fill_deviceinfo_old(dev, di, 1); 786 break; 787 } 788 #endif 789 790 case USB_DEVICESTATS: 791 *(struct usb_device_stats *)data = sc->sc_bus->ub_stats; 792 break; 793 794 default: 795 return (EINVAL); 796 } 797 return (0); 798 } 799 800 int 801 usbpoll(dev_t dev, int events, struct lwp *l) 802 { 803 int revents, mask; 804 805 if (minor(dev) == USB_DEV_MINOR) { 806 revents = 0; 807 mask = POLLIN | POLLRDNORM; 808 809 mutex_enter(&usb_event_lock); 810 if (events & mask && usb_nevents > 0) 811 revents |= events & mask; 812 if (revents == 0 && events & mask) 813 selrecord(l, &usb_selevent); 814 mutex_exit(&usb_event_lock); 815 816 return (revents); 817 } else { 818 return (0); 819 } 820 } 821 822 static void 823 filt_usbrdetach(struct knote *kn) 824 { 825 826 mutex_enter(&usb_event_lock); 827 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 828 mutex_exit(&usb_event_lock); 829 } 830 831 static int 832 filt_usbread(struct knote *kn, long hint) 833 { 834 835 if (usb_nevents == 0) 836 return (0); 837 838 kn->kn_data = sizeof(struct usb_event); 839 return (1); 840 } 841 842 static const struct filterops usbread_filtops = 843 { 1, NULL, filt_usbrdetach, filt_usbread }; 844 845 int 846 usbkqfilter(dev_t dev, struct knote *kn) 847 { 848 struct klist *klist; 849 850 switch (kn->kn_filter) { 851 case EVFILT_READ: 852 if (minor(dev) != USB_DEV_MINOR) 853 return (1); 854 klist = &usb_selevent.sel_klist; 855 kn->kn_fop = &usbread_filtops; 856 break; 857 858 default: 859 return (EINVAL); 860 } 861 862 kn->kn_hook = NULL; 863 864 mutex_enter(&usb_event_lock); 865 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 866 mutex_exit(&usb_event_lock); 867 868 return (0); 869 } 870 871 /* Explore device tree from the root. */ 872 Static void 873 usb_discover(struct usb_softc *sc) 874 { 875 876 KASSERT(mutex_owned(sc->sc_bus->ub_lock)); 877 878 DPRINTFN(2,("usb_discover\n")); 879 if (usb_noexplore > 1) 880 return; 881 /* 882 * We need mutual exclusion while traversing the device tree, 883 * but this is guaranteed since this function is only called 884 * from the event thread for the controller. 885 * 886 * Also, we now have sc_bus->ub_lock held. 887 */ 888 while (sc->sc_bus->ub_needsexplore && !sc->sc_dying) { 889 sc->sc_bus->ub_needsexplore = 0; 890 mutex_exit(sc->sc_bus->ub_lock); 891 sc->sc_bus->ub_roothub->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 892 mutex_enter(sc->sc_bus->ub_lock); 893 } 894 } 895 896 void 897 usb_needs_explore(usbd_device_handle dev) 898 { 899 DPRINTFN(2,("usb_needs_explore\n")); 900 mutex_enter(dev->ud_bus->ub_lock); 901 dev->ud_bus->ub_needsexplore = 1; 902 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 903 mutex_exit(dev->ud_bus->ub_lock); 904 } 905 906 void 907 usb_needs_reattach(usbd_device_handle dev) 908 { 909 DPRINTFN(2,("usb_needs_reattach\n")); 910 mutex_enter(dev->ud_bus->ub_lock); 911 dev->ud_powersrc->up_reattach = 1; 912 dev->ud_bus->ub_needsexplore = 1; 913 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 914 mutex_exit(dev->ud_bus->ub_lock); 915 } 916 917 /* Called at with usb_event_lock held. */ 918 int 919 usb_get_next_event(struct usb_event *ue) 920 { 921 struct usb_event_q *ueq; 922 923 KASSERT(mutex_owned(&usb_event_lock)); 924 925 if (usb_nevents <= 0) 926 return (0); 927 ueq = SIMPLEQ_FIRST(&usb_events); 928 #ifdef DIAGNOSTIC 929 if (ueq == NULL) { 930 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 931 usb_nevents = 0; 932 return (0); 933 } 934 #endif 935 if (ue) 936 *ue = ueq->ue; 937 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 938 usb_free_event((struct usb_event *)(void *)ueq); 939 usb_nevents--; 940 return (1); 941 } 942 943 void 944 usbd_add_dev_event(int type, usbd_device_handle udev) 945 { 946 struct usb_event *ue = usb_alloc_event(); 947 948 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 949 usb_add_event(type, ue); 950 } 951 952 void 953 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 954 { 955 struct usb_event *ue = usb_alloc_event(); 956 957 ue->u.ue_driver.ue_cookie = udev->ud_cookie; 958 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 959 sizeof ue->u.ue_driver.ue_devname); 960 usb_add_event(type, ue); 961 } 962 963 Static struct usb_event * 964 usb_alloc_event(void) 965 { 966 /* Yes, this is right; we allocate enough so that we can use it later */ 967 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 968 } 969 970 Static void 971 usb_free_event(struct usb_event *uep) 972 { 973 free(uep, M_USBDEV); 974 } 975 976 Static void 977 usb_add_event(int type, struct usb_event *uep) 978 { 979 struct usb_event_q *ueq; 980 struct timeval thetime; 981 982 microtime(&thetime); 983 /* Don't want to wait here with usb_event_lock held */ 984 ueq = (struct usb_event_q *)(void *)uep; 985 ueq->ue = *uep; 986 ueq->ue.ue_type = type; 987 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 988 989 mutex_enter(&usb_event_lock); 990 if (++usb_nevents >= USB_MAX_EVENTS) { 991 /* Too many queued events, drop an old one. */ 992 DPRINTFN(-1,("usb: event dropped\n")); 993 (void)usb_get_next_event(0); 994 } 995 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 996 cv_signal(&usb_event_cv); 997 selnotify(&usb_selevent, 0, 0); 998 if (usb_async_proc != NULL) { 999 kpreempt_disable(); 1000 softint_schedule(usb_async_sih); 1001 kpreempt_enable(); 1002 } 1003 mutex_exit(&usb_event_lock); 1004 } 1005 1006 Static void 1007 usb_async_intr(void *cookie) 1008 { 1009 proc_t *proc; 1010 1011 mutex_enter(proc_lock); 1012 if ((proc = usb_async_proc) != NULL) 1013 psignal(proc, SIGIO); 1014 mutex_exit(proc_lock); 1015 } 1016 1017 Static void 1018 usb_soft_intr(void *arg) 1019 { 1020 usbd_bus_handle bus = arg; 1021 1022 mutex_enter(bus->ub_lock); 1023 bus->ub_methods->ubm_softint(bus); 1024 mutex_exit(bus->ub_lock); 1025 } 1026 1027 void 1028 usb_schedsoftintr(usbd_bus_handle bus) 1029 { 1030 1031 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->ub_usepolling)); 1032 1033 if (bus->ub_usepolling) { 1034 bus->ub_methods->ubm_softint(bus); 1035 } else { 1036 kpreempt_disable(); 1037 softint_schedule(bus->ub_soft); 1038 kpreempt_enable(); 1039 } 1040 } 1041 1042 int 1043 usb_activate(device_t self, enum devact act) 1044 { 1045 struct usb_softc *sc = device_private(self); 1046 1047 switch (act) { 1048 case DVACT_DEACTIVATE: 1049 sc->sc_dying = 1; 1050 return 0; 1051 default: 1052 return EOPNOTSUPP; 1053 } 1054 } 1055 1056 void 1057 usb_childdet(device_t self, device_t child) 1058 { 1059 int i; 1060 struct usb_softc *sc = device_private(self); 1061 struct usbd_device *dev; 1062 1063 if ((dev = sc->sc_port.up_dev) == NULL || dev->ud_subdevlen == 0) 1064 return; 1065 1066 for (i = 0; i < dev->ud_subdevlen; i++) 1067 if (dev->ud_subdevs[i] == child) 1068 dev->ud_subdevs[i] = NULL; 1069 } 1070 1071 int 1072 usb_detach(device_t self, int flags) 1073 { 1074 struct usb_softc *sc = device_private(self); 1075 struct usb_event *ue; 1076 int rc; 1077 1078 DPRINTF(("usb_detach: start\n")); 1079 1080 /* Make all devices disconnect. */ 1081 if (sc->sc_port.up_dev != NULL && 1082 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1083 return rc; 1084 1085 pmf_device_deregister(self); 1086 /* Kill off event thread. */ 1087 sc->sc_dying = 1; 1088 while (sc->sc_event_thread != NULL) { 1089 mutex_enter(sc->sc_bus->ub_lock); 1090 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 1091 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 1092 sc->sc_bus->ub_lock, hz * 60); 1093 mutex_exit(sc->sc_bus->ub_lock); 1094 } 1095 DPRINTF(("usb_detach: event thread dead\n")); 1096 1097 if (sc->sc_bus->ub_soft != NULL) { 1098 softint_disestablish(sc->sc_bus->ub_soft); 1099 sc->sc_bus->ub_soft = NULL; 1100 } 1101 1102 ue = usb_alloc_event(); 1103 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1104 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1105 1106 cv_destroy(&sc->sc_bus->ub_needsexplore_cv); 1107 1108 return (0); 1109 } 1110 1111 #ifdef COMPAT_30 1112 Static void 1113 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1114 const struct usb_device_info *ue) 1115 { 1116 const unsigned char *p; 1117 unsigned char *q; 1118 int i, n; 1119 1120 uo->udi_bus = ue->udi_bus; 1121 uo->udi_addr = ue->udi_addr; 1122 uo->udi_cookie = ue->udi_cookie; 1123 for (i = 0, p = (const unsigned char *)ue->udi_product, 1124 q = (unsigned char *)uo->udi_product; 1125 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1126 if (*p < 0x80) 1127 q[i++] = *p; 1128 else { 1129 q[i++] = '?'; 1130 if ((*p & 0xe0) == 0xe0) 1131 p++; 1132 p++; 1133 } 1134 } 1135 q[i] = 0; 1136 1137 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1138 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1139 if (* p < 0x80) 1140 q[i++] = *p; 1141 else { 1142 q[i++] = '?'; 1143 p++; 1144 if ((*p & 0xe0) == 0xe0) 1145 p++; 1146 } 1147 } 1148 q[i] = 0; 1149 1150 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1151 1152 uo->udi_productNo = ue->udi_productNo; 1153 uo->udi_vendorNo = ue->udi_vendorNo; 1154 uo->udi_releaseNo = ue->udi_releaseNo; 1155 uo->udi_class = ue->udi_class; 1156 uo->udi_subclass = ue->udi_subclass; 1157 uo->udi_protocol = ue->udi_protocol; 1158 uo->udi_config = ue->udi_config; 1159 uo->udi_speed = ue->udi_speed; 1160 uo->udi_power = ue->udi_power; 1161 uo->udi_nports = ue->udi_nports; 1162 1163 for (n=0; n<USB_MAX_DEVNAMES; n++) 1164 memcpy(uo->udi_devnames[n], 1165 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1166 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1167 } 1168 #endif 1169
Indexes created Sun Sep 28 16:09:52 GMT 2025