usb.c revision 1.156.2.6
1 /* $NetBSD: usb.c,v 1.156.2.6 2015/03/21 15:28:10 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 1.156.2.6 2015/03/21 15:28:10 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 /* 89 * 0 - do usual exploration 90 * 1 - do not use timeout exploration 91 * >1 - do no exploration 92 */ 93 int usb_noexplore = 0; 94 95 int usbdebug = 0; 96 SYSCTL_SETUP(sysctl_hw_usb_setup, "sysctl hw.usb setup") 97 { 98 int err; 99 const struct sysctlnode *rnode; 100 const struct sysctlnode *cnode; 101 102 err = sysctl_createv(clog, 0, NULL, &rnode, 103 CTLFLAG_PERMANENT, CTLTYPE_NODE, "usb", 104 SYSCTL_DESCR("usb global controls"), 105 NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL); 106 107 if (err) 108 goto fail; 109 110 /* control debugging printfs */ 111 err = sysctl_createv(clog, 0, &rnode, &cnode, 112 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, 113 "debug", SYSCTL_DESCR("Enable debugging output"), 114 NULL, 0, &usbdebug, sizeof(usbdebug), CTL_CREATE, CTL_EOL); 115 if (err) 116 goto fail; 117 118 return; 119 fail: 120 aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err); 121 } 122 #define usb_noexplore 0 123 #endif 124 125 #define DPRINTF(FMT,A,B,C,D) USBHIST_LOG(usbdebug,FMT,A,B,C,D) 126 #define DPRINTFN(N,FMT,A,B,C,D) USBHIST_LOGN(usbdebug,N,FMT,A,B,C,D) 127 128 struct usb_softc { 129 #if 0 130 device_t sc_dev; /* base device */ 131 #endif 132 struct usbd_bus *sc_bus; /* USB controller */ 133 struct usbd_port sc_port; /* dummy port for root hub */ 134 135 struct lwp *sc_event_thread; 136 137 char sc_dying; 138 }; 139 140 struct usb_taskq { 141 TAILQ_HEAD(, usb_task) tasks; 142 kmutex_t lock; 143 kcondvar_t cv; 144 struct lwp *task_thread_lwp; 145 const char *name; 146 }; 147 148 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 149 150 dev_type_open(usbopen); 151 dev_type_close(usbclose); 152 dev_type_read(usbread); 153 dev_type_ioctl(usbioctl); 154 dev_type_poll(usbpoll); 155 dev_type_kqfilter(usbkqfilter); 156 157 const struct cdevsw usb_cdevsw = { 158 .d_open = usbopen, 159 .d_close = usbclose, 160 .d_read = usbread, 161 .d_write = nowrite, 162 .d_ioctl = usbioctl, 163 .d_stop = nostop, 164 .d_tty = notty, 165 .d_poll = usbpoll, 166 .d_mmap = nommap, 167 .d_kqfilter = usbkqfilter, 168 .d_discard = nodiscard, 169 .d_flag = D_OTHER 170 }; 171 172 Static void usb_discover(struct usb_softc *); 173 Static void usb_create_event_thread(device_t); 174 Static void usb_event_thread(void *); 175 Static void usb_task_thread(void *); 176 177 #define USB_MAX_EVENTS 100 178 struct usb_event_q { 179 struct usb_event ue; 180 SIMPLEQ_ENTRY(usb_event_q) next; 181 }; 182 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 183 SIMPLEQ_HEAD_INITIALIZER(usb_events); 184 Static int usb_nevents = 0; 185 Static struct selinfo usb_selevent; 186 Static kmutex_t usb_event_lock; 187 Static kcondvar_t usb_event_cv; 188 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 189 Static void *usb_async_sih; 190 Static int usb_dev_open = 0; 191 Static struct usb_event *usb_alloc_event(void); 192 Static void usb_free_event(struct usb_event *); 193 Static void usb_add_event(int, struct usb_event *); 194 Static int usb_get_next_event(struct usb_event *); 195 Static void usb_async_intr(void *); 196 Static void usb_soft_intr(void *); 197 198 #ifdef COMPAT_30 199 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 200 #endif 201 202 Static const char *usbrev_str[] = USBREV_STR; 203 204 static int usb_match(device_t, cfdata_t, void *); 205 static void usb_attach(device_t, device_t, void *); 206 static int usb_detach(device_t, int); 207 static int usb_activate(device_t, enum devact); 208 static void usb_childdet(device_t, device_t); 209 static int usb_once_init(void); 210 static void usb_doattach(device_t); 211 212 extern struct cfdriver usb_cd; 213 214 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 215 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 216 DVF_DETACH_SHUTDOWN); 217 218 static const char *taskq_names[] = USB_TASKQ_NAMES; 219 220 int 221 usb_match(device_t parent, cfdata_t match, void *aux) 222 { 223 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 224 225 return UMATCH_GENERIC; 226 } 227 228 void 229 usb_attach(device_t parent, device_t self, void *aux) 230 { 231 static ONCE_DECL(init_control); 232 struct usb_softc *sc = device_private(self); 233 int usbrev; 234 235 sc->sc_bus = aux; 236 usbrev = sc->sc_bus->ub_revision; 237 238 aprint_naive("\n"); 239 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 240 switch (usbrev) { 241 case USBREV_1_0: 242 case USBREV_1_1: 243 case USBREV_2_0: 244 case USBREV_3_0: 245 break; 246 default: 247 aprint_error(", not supported\n"); 248 sc->sc_dying = 1; 249 return; 250 } 251 aprint_normal("\n"); 252 253 /* XXX we should have our own level */ 254 sc->sc_bus->ub_soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 255 usb_soft_intr, sc->sc_bus); 256 if (sc->sc_bus->ub_soft == NULL) { 257 aprint_error("%s: can't register softintr\n", 258 device_xname(self)); 259 sc->sc_dying = 1; 260 return; 261 } 262 263 sc->sc_bus->ub_methods->ubm_getlock(sc->sc_bus, &sc->sc_bus->ub_lock); 264 KASSERT(sc->sc_bus->ub_lock != NULL); 265 266 RUN_ONCE(&init_control, usb_once_init); 267 config_interrupts(self, usb_doattach); 268 } 269 270 static int 271 usb_once_init(void) 272 { 273 struct usb_taskq *taskq; 274 int i; 275 276 USBHIST_INIT(usbhist, USBHIST_SIZE); 277 278 selinit(&usb_selevent); 279 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 280 cv_init(&usb_event_cv, "usbrea"); 281 282 for (i = 0; i < USB_NUM_TASKQS; i++) { 283 taskq = &usb_taskq[i]; 284 285 TAILQ_INIT(&taskq->tasks); 286 /* 287 * Since USB task methods usb_{add,rem}_task are callable 288 * from any context, we have to make this lock a spinlock. 289 */ 290 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 291 cv_init(&taskq->cv, "usbtsk"); 292 taskq->name = taskq_names[i]; 293 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 294 usb_task_thread, taskq, &taskq->task_thread_lwp, 295 "%s", taskq->name)) { 296 printf("unable to create task thread: %s\n", taskq->name); 297 panic("usb_create_event_thread task"); 298 } 299 /* 300 * XXX we should make sure these threads are alive before 301 * end up using them in usb_doattach(). 302 */ 303 } 304 return 0; 305 } 306 307 static void 308 usb_doattach(device_t self) 309 { 310 struct usb_softc *sc = device_private(self); 311 struct usbd_device *dev; 312 usbd_status err; 313 int speed; 314 struct usb_event *ue; 315 316 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 317 318 sc->sc_bus->ub_usbctl = self; 319 sc->sc_port.up_power = USB_MAX_POWER; 320 321 switch (sc->sc_bus->ub_revision) { 322 case USBREV_1_0: 323 case USBREV_1_1: 324 speed = USB_SPEED_FULL; 325 break; 326 case USBREV_2_0: 327 speed = USB_SPEED_HIGH; 328 break; 329 case USBREV_3_0: 330 speed = USB_SPEED_SUPER; 331 break; 332 default: 333 panic("usb_doattach"); 334 } 335 336 cv_init(&sc->sc_bus->ub_needsexplore_cv, "usbevt"); 337 338 ue = usb_alloc_event(); 339 ue->u.ue_ctrlr.ue_bus = device_unit(self); 340 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 341 342 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 343 &sc->sc_port); 344 if (!err) { 345 dev = sc->sc_port.up_dev; 346 if (dev->ud_hub == NULL) { 347 sc->sc_dying = 1; 348 aprint_error("%s: root device is not a hub\n", 349 device_xname(self)); 350 return; 351 } 352 sc->sc_bus->ub_roothub = dev; 353 usb_create_event_thread(self); 354 #if 1 355 /* 356 * Turning this code off will delay attachment of USB devices 357 * until the USB event thread is running, which means that 358 * the keyboard will not work until after cold boot. 359 */ 360 if (cold && (device_cfdata(self)->cf_flags & 1)) 361 dev->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 362 #endif 363 } else { 364 aprint_error("%s: root hub problem, error=%s\n", 365 device_xname(self), usbd_errstr(err)); 366 sc->sc_dying = 1; 367 } 368 369 config_pending_incr(self); 370 371 if (!pmf_device_register(self, NULL, NULL)) 372 aprint_error_dev(self, "couldn't establish power handler\n"); 373 374 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 375 usb_async_intr, NULL); 376 377 return; 378 } 379 380 void 381 usb_create_event_thread(device_t self) 382 { 383 struct usb_softc *sc = device_private(self); 384 385 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 386 usb_event_thread, sc, &sc->sc_event_thread, 387 "%s", device_xname(self))) { 388 printf("%s: unable to create event thread for\n", 389 device_xname(self)); 390 panic("usb_create_event_thread"); 391 } 392 } 393 394 /* 395 * Add a task to be performed by the task thread. This function can be 396 * called from any context and the task will be executed in a process 397 * context ASAP. 398 */ 399 void 400 usb_add_task(struct usbd_device *dev, struct usb_task *task, int queue) 401 { 402 struct usb_taskq *taskq; 403 404 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 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, "task=%p", task, 0, 0, 0); 413 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 414 cv_signal(&taskq->cv); 415 } else { 416 DPRINTFN(2, "task=%p on q", task, 0, 0, 0); 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 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 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 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 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->ub_lock); 464 sc->sc_bus->ub_needsexplore = 1; 465 usb_discover(sc); 466 mutex_exit(sc->sc_bus->ub_lock); 467 config_pending_decr(sc->sc_bus->ub_usbctl); 468 469 mutex_enter(sc->sc_bus->ub_lock); 470 while (!sc->sc_dying) { 471 if (usb_noexplore < 2) 472 usb_discover(sc); 473 474 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 475 sc->sc_bus->ub_lock, usb_noexplore ? 0 : hz * 60); 476 477 DPRINTFN(2, "sc %p woke up", sc, 0, 0, 0); 478 } 479 sc->sc_event_thread = NULL; 480 481 /* In case parent is waiting for us to exit. */ 482 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 483 mutex_exit(sc->sc_bus->ub_lock); 484 485 DPRINTF("sc %p exit", sc, 0, 0, 0); 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 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 497 498 taskq = arg; 499 DPRINTF("start taskq %p", taskq, 0, 0, 0); 500 501 mutex_enter(&taskq->lock); 502 for (;;) { 503 task = TAILQ_FIRST(&taskq->tasks); 504 if (task == NULL) { 505 cv_wait(&taskq->cv, &taskq->lock); 506 task = TAILQ_FIRST(&taskq->tasks); 507 } 508 DPRINTFN(2, "woke up task=%p", task, 0, 0, 0); 509 if (task != NULL) { 510 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 511 TAILQ_REMOVE(&taskq->tasks, task, next); 512 task->queue = USB_NUM_TASKQS; 513 mutex_exit(&taskq->lock); 514 515 if (!mpsafe) 516 KERNEL_LOCK(1, curlwp); 517 task->fun(task->arg); 518 /* Can't dereference task after this point. */ 519 if (!mpsafe) 520 KERNEL_UNLOCK_ONE(curlwp); 521 522 mutex_enter(&taskq->lock); 523 } 524 } 525 mutex_exit(&taskq->lock); 526 } 527 528 int 529 usbctlprint(void *aux, const char *pnp) 530 { 531 /* only "usb"es can attach to host controllers */ 532 if (pnp) 533 aprint_normal("usb at %s", pnp); 534 535 return UNCONF; 536 } 537 538 int 539 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 540 { 541 int unit = minor(dev); 542 struct usb_softc *sc; 543 544 if (unit == USB_DEV_MINOR) { 545 if (usb_dev_open) 546 return EBUSY; 547 usb_dev_open = 1; 548 mutex_enter(proc_lock); 549 usb_async_proc = 0; 550 mutex_exit(proc_lock); 551 return 0; 552 } 553 554 sc = device_lookup_private(&usb_cd, unit); 555 if (!sc) 556 return ENXIO; 557 558 if (sc->sc_dying) 559 return EIO; 560 561 return 0; 562 } 563 564 int 565 usbread(dev_t dev, struct uio *uio, int flag) 566 { 567 struct usb_event *ue; 568 #ifdef COMPAT_30 569 struct usb_event_old *ueo = NULL; /* XXXGCC */ 570 int useold = 0; 571 #endif 572 int error, n; 573 574 if (minor(dev) != USB_DEV_MINOR) 575 return ENXIO; 576 577 switch (uio->uio_resid) { 578 #ifdef COMPAT_30 579 case sizeof(struct usb_event_old): 580 ueo = kmem_zalloc(sizeof(struct usb_event_old), KM_SLEEP); 581 useold = 1; 582 /* FALLTHRU */ 583 #endif 584 case sizeof(struct usb_event): 585 ue = usb_alloc_event(); 586 break; 587 default: 588 return EINVAL; 589 } 590 591 error = 0; 592 mutex_enter(&usb_event_lock); 593 for (;;) { 594 n = usb_get_next_event(ue); 595 if (n != 0) 596 break; 597 if (flag & IO_NDELAY) { 598 error = EWOULDBLOCK; 599 break; 600 } 601 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 602 if (error) 603 break; 604 } 605 mutex_exit(&usb_event_lock); 606 if (!error) { 607 #ifdef COMPAT_30 608 if (useold) { /* copy fields to old struct */ 609 ueo->ue_type = ue->ue_type; 610 memcpy(&ueo->ue_time, &ue->ue_time, 611 sizeof(struct timespec)); 612 switch (ue->ue_type) { 613 case USB_EVENT_DEVICE_ATTACH: 614 case USB_EVENT_DEVICE_DETACH: 615 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 616 break; 617 618 case USB_EVENT_CTRLR_ATTACH: 619 case USB_EVENT_CTRLR_DETACH: 620 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 621 break; 622 623 case USB_EVENT_DRIVER_ATTACH: 624 case USB_EVENT_DRIVER_DETACH: 625 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 626 memcpy(ueo->u.ue_driver.ue_devname, 627 ue->u.ue_driver.ue_devname, 628 sizeof(ue->u.ue_driver.ue_devname)); 629 break; 630 default: 631 ; 632 } 633 634 error = uiomove((void *)ueo, sizeof *ueo, uio); 635 } else 636 #endif 637 error = uiomove((void *)ue, sizeof *ue, uio); 638 } 639 usb_free_event(ue); 640 #ifdef COMPAT_30 641 if (useold) 642 kmem_free(ueo, sizeof(struct usb_event_old)); 643 #endif 644 645 return error; 646 } 647 648 int 649 usbclose(dev_t dev, int flag, int mode, 650 struct lwp *l) 651 { 652 int unit = minor(dev); 653 654 if (unit == USB_DEV_MINOR) { 655 mutex_enter(proc_lock); 656 usb_async_proc = 0; 657 mutex_exit(proc_lock); 658 usb_dev_open = 0; 659 } 660 661 return 0; 662 } 663 664 int 665 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 666 { 667 struct usb_softc *sc; 668 int unit = minor(devt); 669 670 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 671 672 if (unit == USB_DEV_MINOR) { 673 switch (cmd) { 674 case FIONBIO: 675 /* All handled in the upper FS layer. */ 676 return 0; 677 678 case FIOASYNC: 679 mutex_enter(proc_lock); 680 if (*(int *)data) 681 usb_async_proc = l->l_proc; 682 else 683 usb_async_proc = 0; 684 mutex_exit(proc_lock); 685 return 0; 686 687 default: 688 return EINVAL; 689 } 690 } 691 692 sc = device_lookup_private(&usb_cd, unit); 693 694 if (sc->sc_dying) 695 return EIO; 696 697 switch (cmd) { 698 #ifdef USB_DEBUG 699 case USB_SETDEBUG: 700 if (!(flag & FWRITE)) 701 return EBADF; 702 usbdebug = ((*(int *)data) & 0x000000ff); 703 break; 704 #endif /* USB_DEBUG */ 705 case USB_REQUEST: 706 { 707 struct usb_ctl_request *ur = (void *)data; 708 int len = UGETW(ur->ucr_request.wLength); 709 struct iovec iov; 710 struct uio uio; 711 void *ptr = 0; 712 int addr = ur->ucr_addr; 713 usbd_status err; 714 int error = 0; 715 716 if (!(flag & FWRITE)) 717 return EBADF; 718 719 DPRINTF("USB_REQUEST addr=%d len=%d\n", addr, len, 0, 0); 720 if (len < 0 || len > 32768) 721 return EINVAL; 722 if (addr < 0 || addr >= USB_MAX_DEVICES || 723 sc->sc_bus->ub_devices[addr] == NULL) 724 return EINVAL; 725 if (len != 0) { 726 iov.iov_base = (void *)ur->ucr_data; 727 iov.iov_len = len; 728 uio.uio_iov = &iov; 729 uio.uio_iovcnt = 1; 730 uio.uio_resid = len; 731 uio.uio_offset = 0; 732 uio.uio_rw = 733 ur->ucr_request.bmRequestType & UT_READ ? 734 UIO_READ : UIO_WRITE; 735 uio.uio_vmspace = l->l_proc->p_vmspace; 736 ptr = kmem_alloc(len, KM_SLEEP); 737 if (uio.uio_rw == UIO_WRITE) { 738 error = uiomove(ptr, len, &uio); 739 if (error) 740 goto ret; 741 } 742 } 743 err = usbd_do_request_flags(sc->sc_bus->ub_devices[addr], 744 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 745 USBD_DEFAULT_TIMEOUT); 746 if (err) { 747 error = EIO; 748 goto ret; 749 } 750 if (len > ur->ucr_actlen) 751 len = ur->ucr_actlen; 752 if (len != 0) { 753 if (uio.uio_rw == UIO_READ) { 754 error = uiomove(ptr, len, &uio); 755 if (error) 756 goto ret; 757 } 758 } 759 ret: 760 if (ptr) { 761 len = UGETW(ur->ucr_request.wLength); 762 kmem_free(ptr, len); 763 } 764 return error; 765 } 766 767 case USB_DEVICEINFO: 768 { 769 struct usbd_device *dev; 770 struct usb_device_info *di = (void *)data; 771 int addr = di->udi_addr; 772 773 if (addr < 0 || addr >= USB_MAX_DEVICES) 774 return EINVAL; 775 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 776 return ENXIO; 777 usbd_fill_deviceinfo(dev, di, 1); 778 break; 779 } 780 781 #ifdef COMPAT_30 782 case USB_DEVICEINFO_OLD: 783 { 784 struct usbd_device *dev; 785 struct usb_device_info_old *di = (void *)data; 786 int addr = di->udi_addr; 787 788 if (addr < 1 || addr >= USB_MAX_DEVICES) 789 return EINVAL; 790 if ((dev = sc->sc_bus->ub_devices[addr]) == NULL) 791 return ENXIO; 792 usbd_fill_deviceinfo_old(dev, di, 1); 793 break; 794 } 795 #endif 796 797 case USB_DEVICESTATS: 798 *(struct usb_device_stats *)data = sc->sc_bus->ub_stats; 799 break; 800 801 default: 802 return EINVAL; 803 } 804 return 0; 805 } 806 807 int 808 usbpoll(dev_t dev, int events, struct lwp *l) 809 { 810 int revents, mask; 811 812 if (minor(dev) == USB_DEV_MINOR) { 813 revents = 0; 814 mask = POLLIN | POLLRDNORM; 815 816 mutex_enter(&usb_event_lock); 817 if (events & mask && usb_nevents > 0) 818 revents |= events & mask; 819 if (revents == 0 && events & mask) 820 selrecord(l, &usb_selevent); 821 mutex_exit(&usb_event_lock); 822 823 return revents; 824 } else { 825 return 0; 826 } 827 } 828 829 static void 830 filt_usbrdetach(struct knote *kn) 831 { 832 833 mutex_enter(&usb_event_lock); 834 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 835 mutex_exit(&usb_event_lock); 836 } 837 838 static int 839 filt_usbread(struct knote *kn, long hint) 840 { 841 842 if (usb_nevents == 0) 843 return 0; 844 845 kn->kn_data = sizeof(struct usb_event); 846 return 1; 847 } 848 849 static const struct filterops usbread_filtops = 850 { 1, NULL, filt_usbrdetach, filt_usbread }; 851 852 int 853 usbkqfilter(dev_t dev, struct knote *kn) 854 { 855 struct klist *klist; 856 857 switch (kn->kn_filter) { 858 case EVFILT_READ: 859 if (minor(dev) != USB_DEV_MINOR) 860 return 1; 861 klist = &usb_selevent.sel_klist; 862 kn->kn_fop = &usbread_filtops; 863 break; 864 865 default: 866 return EINVAL; 867 } 868 869 kn->kn_hook = NULL; 870 871 mutex_enter(&usb_event_lock); 872 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 873 mutex_exit(&usb_event_lock); 874 875 return 0; 876 } 877 878 /* Explore device tree from the root. */ 879 Static void 880 usb_discover(struct usb_softc *sc) 881 { 882 883 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 884 885 KASSERT(mutex_owned(sc->sc_bus->ub_lock)); 886 887 if (usb_noexplore > 1) 888 return; 889 /* 890 * We need mutual exclusion while traversing the device tree, 891 * but this is guaranteed since this function is only called 892 * from the event thread for the controller. 893 * 894 * Also, we now have sc_bus->ub_lock held. 895 */ 896 while (sc->sc_bus->ub_needsexplore && !sc->sc_dying) { 897 sc->sc_bus->ub_needsexplore = 0; 898 mutex_exit(sc->sc_bus->ub_lock); 899 sc->sc_bus->ub_roothub->ud_hub->uh_explore(sc->sc_bus->ub_roothub); 900 mutex_enter(sc->sc_bus->ub_lock); 901 } 902 } 903 904 void 905 usb_needs_explore(struct usbd_device *dev) 906 { 907 908 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 909 910 mutex_enter(dev->ud_bus->ub_lock); 911 dev->ud_bus->ub_needsexplore = 1; 912 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 913 mutex_exit(dev->ud_bus->ub_lock); 914 } 915 916 void 917 usb_needs_reattach(struct usbd_device *dev) 918 { 919 920 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 921 922 mutex_enter(dev->ud_bus->ub_lock); 923 dev->ud_powersrc->up_reattach = 1; 924 dev->ud_bus->ub_needsexplore = 1; 925 cv_signal(&dev->ud_bus->ub_needsexplore_cv); 926 mutex_exit(dev->ud_bus->ub_lock); 927 } 928 929 /* Called at with usb_event_lock held. */ 930 int 931 usb_get_next_event(struct usb_event *ue) 932 { 933 struct usb_event_q *ueq; 934 935 KASSERT(mutex_owned(&usb_event_lock)); 936 937 if (usb_nevents <= 0) 938 return 0; 939 ueq = SIMPLEQ_FIRST(&usb_events); 940 #ifdef DIAGNOSTIC 941 if (ueq == NULL) { 942 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 943 usb_nevents = 0; 944 return 0; 945 } 946 #endif 947 if (ue) 948 *ue = ueq->ue; 949 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 950 usb_free_event((struct usb_event *)(void *)ueq); 951 usb_nevents--; 952 return 1; 953 } 954 955 void 956 usbd_add_dev_event(int type, struct usbd_device *udev) 957 { 958 struct usb_event *ue = usb_alloc_event(); 959 960 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 961 usb_add_event(type, ue); 962 } 963 964 void 965 usbd_add_drv_event(int type, struct usbd_device *udev, device_t dev) 966 { 967 struct usb_event *ue = usb_alloc_event(); 968 969 ue->u.ue_driver.ue_cookie = udev->ud_cookie; 970 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 971 sizeof ue->u.ue_driver.ue_devname); 972 usb_add_event(type, ue); 973 } 974 975 Static struct usb_event * 976 usb_alloc_event(void) 977 { 978 /* Yes, this is right; we allocate enough so that we can use it later */ 979 return kmem_zalloc(sizeof(struct usb_event_q), KM_SLEEP); 980 } 981 982 Static void 983 usb_free_event(struct usb_event *uep) 984 { 985 kmem_free(uep, sizeof(struct usb_event_q)); 986 } 987 988 Static void 989 usb_add_event(int type, struct usb_event *uep) 990 { 991 struct usb_event_q *ueq; 992 struct timeval thetime; 993 994 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 995 996 microtime(&thetime); 997 /* Don't want to wait here with usb_event_lock held */ 998 ueq = (struct usb_event_q *)(void *)uep; 999 ueq->ue = *uep; 1000 ueq->ue.ue_type = type; 1001 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 1002 1003 mutex_enter(&usb_event_lock); 1004 if (++usb_nevents >= USB_MAX_EVENTS) { 1005 /* Too many queued events, drop an old one. */ 1006 DPRINTF("event dropped", 0, 0, 0, 0); 1007 (void)usb_get_next_event(0); 1008 } 1009 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 1010 cv_signal(&usb_event_cv); 1011 selnotify(&usb_selevent, 0, 0); 1012 if (usb_async_proc != NULL) { 1013 kpreempt_disable(); 1014 softint_schedule(usb_async_sih); 1015 kpreempt_enable(); 1016 } 1017 mutex_exit(&usb_event_lock); 1018 } 1019 1020 Static void 1021 usb_async_intr(void *cookie) 1022 { 1023 proc_t *proc; 1024 1025 mutex_enter(proc_lock); 1026 if ((proc = usb_async_proc) != NULL) 1027 psignal(proc, SIGIO); 1028 mutex_exit(proc_lock); 1029 } 1030 1031 Static void 1032 usb_soft_intr(void *arg) 1033 { 1034 struct usbd_bus *bus = arg; 1035 1036 mutex_enter(bus->ub_lock); 1037 bus->ub_methods->ubm_softint(bus); 1038 mutex_exit(bus->ub_lock); 1039 } 1040 1041 void 1042 usb_schedsoftintr(struct usbd_bus *bus) 1043 { 1044 1045 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 1046 1047 DPRINTFN(10, "polling=%d", bus->ub_usepolling, 0, 0, 0); 1048 1049 if (bus->ub_usepolling) { 1050 bus->ub_methods->ubm_softint(bus); 1051 } else { 1052 kpreempt_disable(); 1053 softint_schedule(bus->ub_soft); 1054 kpreempt_enable(); 1055 } 1056 } 1057 1058 int 1059 usb_activate(device_t self, enum devact act) 1060 { 1061 struct usb_softc *sc = device_private(self); 1062 1063 switch (act) { 1064 case DVACT_DEACTIVATE: 1065 sc->sc_dying = 1; 1066 return 0; 1067 default: 1068 return EOPNOTSUPP; 1069 } 1070 } 1071 1072 void 1073 usb_childdet(device_t self, device_t child) 1074 { 1075 int i; 1076 struct usb_softc *sc = device_private(self); 1077 struct usbd_device *dev; 1078 1079 if ((dev = sc->sc_port.up_dev) == NULL || dev->ud_subdevlen == 0) 1080 return; 1081 1082 for (i = 0; i < dev->ud_subdevlen; i++) 1083 if (dev->ud_subdevs[i] == child) 1084 dev->ud_subdevs[i] = NULL; 1085 } 1086 1087 int 1088 usb_detach(device_t self, int flags) 1089 { 1090 struct usb_softc *sc = device_private(self); 1091 struct usb_event *ue; 1092 int rc; 1093 1094 USBHIST_FUNC(); USBHIST_CALLED(usbdebug); 1095 1096 /* Make all devices disconnect. */ 1097 if (sc->sc_port.up_dev != NULL && 1098 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1099 return rc; 1100 1101 pmf_device_deregister(self); 1102 /* Kill off event thread. */ 1103 sc->sc_dying = 1; 1104 while (sc->sc_event_thread != NULL) { 1105 mutex_enter(sc->sc_bus->ub_lock); 1106 cv_signal(&sc->sc_bus->ub_needsexplore_cv); 1107 cv_timedwait(&sc->sc_bus->ub_needsexplore_cv, 1108 sc->sc_bus->ub_lock, hz * 60); 1109 mutex_exit(sc->sc_bus->ub_lock); 1110 } 1111 DPRINTF("event thread dead", 0, 0, 0, 0); 1112 1113 if (sc->sc_bus->ub_soft != NULL) { 1114 softint_disestablish(sc->sc_bus->ub_soft); 1115 sc->sc_bus->ub_soft = NULL; 1116 } 1117 1118 ue = usb_alloc_event(); 1119 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1120 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1121 1122 cv_destroy(&sc->sc_bus->ub_needsexplore_cv); 1123 1124 return 0; 1125 } 1126 1127 #ifdef COMPAT_30 1128 Static void 1129 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1130 const struct usb_device_info *ue) 1131 { 1132 const unsigned char *p; 1133 unsigned char *q; 1134 int i, n; 1135 1136 uo->udi_bus = ue->udi_bus; 1137 uo->udi_addr = ue->udi_addr; 1138 uo->udi_cookie = ue->udi_cookie; 1139 for (i = 0, p = (const unsigned char *)ue->udi_product, 1140 q = (unsigned char *)uo->udi_product; 1141 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1142 if (*p < 0x80) 1143 q[i++] = *p; 1144 else { 1145 q[i++] = '?'; 1146 if ((*p & 0xe0) == 0xe0) 1147 p++; 1148 p++; 1149 } 1150 } 1151 q[i] = 0; 1152 1153 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1154 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1155 if (* p < 0x80) 1156 q[i++] = *p; 1157 else { 1158 q[i++] = '?'; 1159 p++; 1160 if ((*p & 0xe0) == 0xe0) 1161 p++; 1162 } 1163 } 1164 q[i] = 0; 1165 1166 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1167 1168 uo->udi_productNo = ue->udi_productNo; 1169 uo->udi_vendorNo = ue->udi_vendorNo; 1170 uo->udi_releaseNo = ue->udi_releaseNo; 1171 uo->udi_class = ue->udi_class; 1172 uo->udi_subclass = ue->udi_subclass; 1173 uo->udi_protocol = ue->udi_protocol; 1174 uo->udi_config = ue->udi_config; 1175 uo->udi_speed = ue->udi_speed; 1176 uo->udi_power = ue->udi_power; 1177 uo->udi_nports = ue->udi_nports; 1178 1179 for (n=0; n<USB_MAX_DEVNAMES; n++) 1180 memcpy(uo->udi_devnames[n], 1181 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1182 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1183 } 1184 #endif 1185
Indexes created Mon Sep 29 03:10:08 GMT 2025