usb.c revision 1.154
1 /* $NetBSD: usb.c,v 1.154 2014/07/25 08:10:39 dholland 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 1.154 2014/07/25 08:10:39 dholland Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/malloc.h> 50 #include <sys/device.h> 51 #include <sys/kthread.h> 52 #include <sys/proc.h> 53 #include <sys/conf.h> 54 #include <sys/fcntl.h> 55 #include <sys/poll.h> 56 #include <sys/select.h> 57 #include <sys/vnode.h> 58 #include <sys/signalvar.h> 59 #include <sys/intr.h> 60 #include <sys/module.h> 61 #include <sys/mutex.h> 62 #include <sys/bus.h> 63 #include <sys/once.h> 64 #include <sys/atomic.h> 65 66 #include <dev/usb/usb.h> 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 #include <dev/usb/usbdivar.h> 70 #include <dev/usb/usb_verbose.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #define USB_DEV_MINOR 255 74 75 #ifdef USB_DEBUG 76 #define DPRINTF(x) if (usbdebug) printf x 77 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 78 int usbdebug = 0; 79 /* 80 * 0 - do usual exploration 81 * 1 - do not use timeout exploration 82 * >1 - do no exploration 83 */ 84 int usb_noexplore = 0; 85 #else 86 #define DPRINTF(x) 87 #define DPRINTFN(n,x) 88 #define usb_noexplore 0 89 #endif 90 91 struct usb_softc { 92 #if 0 93 device_t sc_dev; /* base device */ 94 #endif 95 usbd_bus_handle sc_bus; /* USB controller */ 96 struct usbd_port sc_port; /* dummy port for root hub */ 97 98 struct lwp *sc_event_thread; 99 100 char sc_dying; 101 }; 102 103 struct usb_taskq { 104 TAILQ_HEAD(, usb_task) tasks; 105 kmutex_t lock; 106 kcondvar_t cv; 107 struct lwp *task_thread_lwp; 108 const char *name; 109 }; 110 111 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 112 113 dev_type_open(usbopen); 114 dev_type_close(usbclose); 115 dev_type_read(usbread); 116 dev_type_ioctl(usbioctl); 117 dev_type_poll(usbpoll); 118 dev_type_kqfilter(usbkqfilter); 119 120 const struct cdevsw usb_cdevsw = { 121 .d_open = usbopen, 122 .d_close = usbclose, 123 .d_read = usbread, 124 .d_write = nowrite, 125 .d_ioctl = usbioctl, 126 .d_stop = nostop, 127 .d_tty = notty, 128 .d_poll = usbpoll, 129 .d_mmap = nommap, 130 .d_kqfilter = usbkqfilter, 131 .d_discard = nodiscard, 132 .d_flag = D_OTHER 133 }; 134 135 Static void usb_discover(struct usb_softc *); 136 Static void usb_create_event_thread(device_t); 137 Static void usb_event_thread(void *); 138 Static void usb_task_thread(void *); 139 140 #define USB_MAX_EVENTS 100 141 struct usb_event_q { 142 struct usb_event ue; 143 SIMPLEQ_ENTRY(usb_event_q) next; 144 }; 145 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 146 SIMPLEQ_HEAD_INITIALIZER(usb_events); 147 Static int usb_nevents = 0; 148 Static struct selinfo usb_selevent; 149 Static kmutex_t usb_event_lock; 150 Static kcondvar_t usb_event_cv; 151 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 152 Static void *usb_async_sih; 153 Static int usb_dev_open = 0; 154 Static struct usb_event *usb_alloc_event(void); 155 Static void usb_free_event(struct usb_event *); 156 Static void usb_add_event(int, struct usb_event *); 157 Static int usb_get_next_event(struct usb_event *); 158 Static void usb_async_intr(void *); 159 Static void usb_soft_intr(void *); 160 161 #ifdef COMPAT_30 162 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 163 #endif 164 165 Static const char *usbrev_str[] = USBREV_STR; 166 167 static int usb_match(device_t, cfdata_t, void *); 168 static void usb_attach(device_t, device_t, void *); 169 static int usb_detach(device_t, int); 170 static int usb_activate(device_t, enum devact); 171 static void usb_childdet(device_t, device_t); 172 static int usb_once_init(void); 173 static void usb_doattach(device_t); 174 175 extern struct cfdriver usb_cd; 176 177 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 178 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 179 DVF_DETACH_SHUTDOWN); 180 181 static const char *taskq_names[] = USB_TASKQ_NAMES; 182 183 int 184 usb_match(device_t parent, cfdata_t match, void *aux) 185 { 186 DPRINTF(("usbd_match\n")); 187 return (UMATCH_GENERIC); 188 } 189 190 void 191 usb_attach(device_t parent, device_t self, void *aux) 192 { 193 static ONCE_DECL(init_control); 194 struct usb_softc *sc = device_private(self); 195 int usbrev; 196 197 sc->sc_bus = aux; 198 usbrev = sc->sc_bus->usbrev; 199 200 aprint_naive("\n"); 201 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 202 switch (usbrev) { 203 case USBREV_1_0: 204 case USBREV_1_1: 205 case USBREV_2_0: 206 break; 207 default: 208 aprint_error(", not supported\n"); 209 sc->sc_dying = 1; 210 return; 211 } 212 aprint_normal("\n"); 213 214 /* XXX we should have our own level */ 215 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 216 usb_soft_intr, sc->sc_bus); 217 if (sc->sc_bus->soft == NULL) { 218 aprint_error("%s: can't register softintr\n", 219 device_xname(self)); 220 sc->sc_dying = 1; 221 return; 222 } 223 224 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 225 KASSERT(sc->sc_bus->lock != NULL); 226 227 RUN_ONCE(&init_control, usb_once_init); 228 config_interrupts(self, usb_doattach); 229 } 230 231 static int 232 usb_once_init(void) 233 { 234 struct usb_taskq *taskq; 235 int i; 236 237 selinit(&usb_selevent); 238 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 239 cv_init(&usb_event_cv, "usbrea"); 240 241 for (i = 0; i < USB_NUM_TASKQS; i++) { 242 taskq = &usb_taskq[i]; 243 244 TAILQ_INIT(&taskq->tasks); 245 /* 246 * Since USB task methods usb_{add,rem}_task are callable 247 * from any context, we have to make this lock a spinlock. 248 */ 249 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 250 cv_init(&taskq->cv, "usbtsk"); 251 taskq->name = taskq_names[i]; 252 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 253 usb_task_thread, taskq, &taskq->task_thread_lwp, 254 "%s", taskq->name)) { 255 printf("unable to create task thread: %s\n", taskq->name); 256 panic("usb_create_event_thread task"); 257 } 258 /* 259 * XXX we should make sure these threads are alive before 260 * end up using them in usb_doattach(). 261 */ 262 } 263 return 0; 264 } 265 266 static void 267 usb_doattach(device_t self) 268 { 269 struct usb_softc *sc = device_private(self); 270 usbd_device_handle dev; 271 usbd_status err; 272 int speed; 273 struct usb_event *ue; 274 275 DPRINTF(("usbd_doattach\n")); 276 277 sc->sc_bus->usbctl = self; 278 sc->sc_port.power = USB_MAX_POWER; 279 280 switch (sc->sc_bus->usbrev) { 281 case USBREV_1_0: 282 case USBREV_1_1: 283 speed = USB_SPEED_FULL; 284 break; 285 case USBREV_2_0: 286 speed = USB_SPEED_HIGH; 287 break; 288 default: 289 panic("usb_doattach"); 290 } 291 292 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 293 294 ue = usb_alloc_event(); 295 ue->u.ue_ctrlr.ue_bus = device_unit(self); 296 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 297 298 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 299 &sc->sc_port); 300 if (!err) { 301 dev = sc->sc_port.device; 302 if (dev->hub == NULL) { 303 sc->sc_dying = 1; 304 aprint_error("%s: root device is not a hub\n", 305 device_xname(self)); 306 return; 307 } 308 sc->sc_bus->root_hub = dev; 309 usb_create_event_thread(self); 310 #if 1 311 /* 312 * Turning this code off will delay attachment of USB devices 313 * until the USB event thread is running, which means that 314 * the keyboard will not work until after cold boot. 315 */ 316 if (cold && (device_cfdata(self)->cf_flags & 1)) 317 dev->hub->explore(sc->sc_bus->root_hub); 318 #endif 319 } else { 320 aprint_error("%s: root hub problem, error=%s\n", 321 device_xname(self), usbd_errstr(err)); 322 sc->sc_dying = 1; 323 } 324 325 config_pending_incr(self); 326 327 if (!pmf_device_register(self, NULL, NULL)) 328 aprint_error_dev(self, "couldn't establish power handler\n"); 329 330 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 331 usb_async_intr, NULL); 332 333 return; 334 } 335 336 void 337 usb_create_event_thread(device_t self) 338 { 339 struct usb_softc *sc = device_private(self); 340 341 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 342 usb_event_thread, sc, &sc->sc_event_thread, 343 "%s", device_xname(self))) { 344 printf("%s: unable to create event thread for\n", 345 device_xname(self)); 346 panic("usb_create_event_thread"); 347 } 348 } 349 350 /* 351 * Add a task to be performed by the task thread. This function can be 352 * called from any context and the task will be executed in a process 353 * context ASAP. 354 */ 355 void 356 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 357 { 358 struct usb_taskq *taskq; 359 360 KASSERT(0 <= queue); 361 KASSERT(queue < USB_NUM_TASKQS); 362 taskq = &usb_taskq[queue]; 363 mutex_enter(&taskq->lock); 364 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 365 USB_NUM_TASKQS) { 366 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 367 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 368 cv_signal(&taskq->cv); 369 } else { 370 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 371 } 372 mutex_exit(&taskq->lock); 373 } 374 375 /* 376 * XXX This does not wait for completion! Most uses need such an 377 * operation. Urgh... 378 */ 379 void 380 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 381 { 382 unsigned queue; 383 384 while ((queue = task->queue) != USB_NUM_TASKQS) { 385 struct usb_taskq *taskq = &usb_taskq[queue]; 386 mutex_enter(&taskq->lock); 387 if (__predict_true(task->queue == queue)) { 388 TAILQ_REMOVE(&taskq->tasks, task, next); 389 task->queue = USB_NUM_TASKQS; 390 mutex_exit(&taskq->lock); 391 break; 392 } 393 mutex_exit(&taskq->lock); 394 } 395 } 396 397 void 398 usb_event_thread(void *arg) 399 { 400 struct usb_softc *sc = arg; 401 402 DPRINTF(("usb_event_thread: start\n")); 403 404 /* 405 * In case this controller is a companion controller to an 406 * EHCI controller we need to wait until the EHCI controller 407 * has grabbed the port. 408 * XXX It would be nicer to do this with a tsleep(), but I don't 409 * know how to synchronize the creation of the threads so it 410 * will work. 411 */ 412 usb_delay_ms(sc->sc_bus, 500); 413 414 /* Make sure first discover does something. */ 415 mutex_enter(sc->sc_bus->lock); 416 sc->sc_bus->needs_explore = 1; 417 usb_discover(sc); 418 mutex_exit(sc->sc_bus->lock); 419 config_pending_decr(sc->sc_bus->usbctl); 420 421 mutex_enter(sc->sc_bus->lock); 422 while (!sc->sc_dying) { 423 if (usb_noexplore < 2) 424 usb_discover(sc); 425 426 cv_timedwait(&sc->sc_bus->needs_explore_cv, 427 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 428 429 DPRINTFN(2,("usb_event_thread: woke up\n")); 430 } 431 sc->sc_event_thread = NULL; 432 433 /* In case parent is waiting for us to exit. */ 434 cv_signal(&sc->sc_bus->needs_explore_cv); 435 mutex_exit(sc->sc_bus->lock); 436 437 DPRINTF(("usb_event_thread: exit\n")); 438 kthread_exit(0); 439 } 440 441 void 442 usb_task_thread(void *arg) 443 { 444 struct usb_task *task; 445 struct usb_taskq *taskq; 446 bool mpsafe; 447 448 taskq = arg; 449 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 450 451 mutex_enter(&taskq->lock); 452 for (;;) { 453 task = TAILQ_FIRST(&taskq->tasks); 454 if (task == NULL) { 455 cv_wait(&taskq->cv, &taskq->lock); 456 task = TAILQ_FIRST(&taskq->tasks); 457 } 458 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 459 if (task != NULL) { 460 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 461 TAILQ_REMOVE(&taskq->tasks, task, next); 462 task->queue = USB_NUM_TASKQS; 463 mutex_exit(&taskq->lock); 464 465 if (!mpsafe) 466 KERNEL_LOCK(1, curlwp); 467 task->fun(task->arg); 468 /* Can't dereference task after this point. */ 469 if (!mpsafe) 470 KERNEL_UNLOCK_ONE(curlwp); 471 472 mutex_enter(&taskq->lock); 473 } 474 } 475 mutex_exit(&taskq->lock); 476 } 477 478 int 479 usbctlprint(void *aux, const char *pnp) 480 { 481 /* only "usb"es can attach to host controllers */ 482 if (pnp) 483 aprint_normal("usb at %s", pnp); 484 485 return (UNCONF); 486 } 487 488 int 489 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 490 { 491 int unit = minor(dev); 492 struct usb_softc *sc; 493 494 if (unit == USB_DEV_MINOR) { 495 if (usb_dev_open) 496 return (EBUSY); 497 usb_dev_open = 1; 498 mutex_enter(proc_lock); 499 usb_async_proc = 0; 500 mutex_exit(proc_lock); 501 return (0); 502 } 503 504 sc = device_lookup_private(&usb_cd, unit); 505 if (!sc) 506 return (ENXIO); 507 508 if (sc->sc_dying) 509 return (EIO); 510 511 return (0); 512 } 513 514 int 515 usbread(dev_t dev, struct uio *uio, int flag) 516 { 517 struct usb_event *ue; 518 #ifdef COMPAT_30 519 struct usb_event_old *ueo = NULL; /* XXXGCC */ 520 int useold = 0; 521 #endif 522 int error, n; 523 524 if (minor(dev) != USB_DEV_MINOR) 525 return (ENXIO); 526 527 switch (uio->uio_resid) { 528 #ifdef COMPAT_30 529 case sizeof(struct usb_event_old): 530 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 531 M_WAITOK|M_ZERO); 532 useold = 1; 533 /* FALLTHRU */ 534 #endif 535 case sizeof(struct usb_event): 536 ue = usb_alloc_event(); 537 break; 538 default: 539 return (EINVAL); 540 } 541 542 error = 0; 543 mutex_enter(&usb_event_lock); 544 for (;;) { 545 n = usb_get_next_event(ue); 546 if (n != 0) 547 break; 548 if (flag & IO_NDELAY) { 549 error = EWOULDBLOCK; 550 break; 551 } 552 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 553 if (error) 554 break; 555 } 556 mutex_exit(&usb_event_lock); 557 if (!error) { 558 #ifdef COMPAT_30 559 if (useold) { /* copy fields to old struct */ 560 ueo->ue_type = ue->ue_type; 561 memcpy(&ueo->ue_time, &ue->ue_time, 562 sizeof(struct timespec)); 563 switch (ue->ue_type) { 564 case USB_EVENT_DEVICE_ATTACH: 565 case USB_EVENT_DEVICE_DETACH: 566 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 567 break; 568 569 case USB_EVENT_CTRLR_ATTACH: 570 case USB_EVENT_CTRLR_DETACH: 571 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 572 break; 573 574 case USB_EVENT_DRIVER_ATTACH: 575 case USB_EVENT_DRIVER_DETACH: 576 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 577 memcpy(ueo->u.ue_driver.ue_devname, 578 ue->u.ue_driver.ue_devname, 579 sizeof(ue->u.ue_driver.ue_devname)); 580 break; 581 default: 582 ; 583 } 584 585 error = uiomove((void *)ueo, sizeof *ueo, uio); 586 } else 587 #endif 588 error = uiomove((void *)ue, sizeof *ue, uio); 589 } 590 usb_free_event(ue); 591 #ifdef COMPAT_30 592 if (useold) 593 free(ueo, M_USBDEV); 594 #endif 595 596 return (error); 597 } 598 599 int 600 usbclose(dev_t dev, int flag, int mode, 601 struct lwp *l) 602 { 603 int unit = minor(dev); 604 605 if (unit == USB_DEV_MINOR) { 606 mutex_enter(proc_lock); 607 usb_async_proc = 0; 608 mutex_exit(proc_lock); 609 usb_dev_open = 0; 610 } 611 612 return (0); 613 } 614 615 int 616 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 617 { 618 struct usb_softc *sc; 619 int unit = minor(devt); 620 621 if (unit == USB_DEV_MINOR) { 622 switch (cmd) { 623 case FIONBIO: 624 /* All handled in the upper FS layer. */ 625 return (0); 626 627 case FIOASYNC: 628 mutex_enter(proc_lock); 629 if (*(int *)data) 630 usb_async_proc = l->l_proc; 631 else 632 usb_async_proc = 0; 633 mutex_exit(proc_lock); 634 return (0); 635 636 default: 637 return (EINVAL); 638 } 639 } 640 641 sc = device_lookup_private(&usb_cd, unit); 642 643 if (sc->sc_dying) 644 return (EIO); 645 646 switch (cmd) { 647 #ifdef USB_DEBUG 648 case USB_SETDEBUG: 649 if (!(flag & FWRITE)) 650 return (EBADF); 651 usbdebug = ((*(int *)data) & 0x000000ff); 652 break; 653 #endif /* USB_DEBUG */ 654 case USB_REQUEST: 655 { 656 struct usb_ctl_request *ur = (void *)data; 657 int len = UGETW(ur->ucr_request.wLength); 658 struct iovec iov; 659 struct uio uio; 660 void *ptr = 0; 661 int addr = ur->ucr_addr; 662 usbd_status err; 663 int error = 0; 664 665 if (!(flag & FWRITE)) 666 return (EBADF); 667 668 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 669 if (len < 0 || len > 32768) 670 return (EINVAL); 671 if (addr < 0 || addr >= USB_MAX_DEVICES || 672 sc->sc_bus->devices[addr] == NULL) 673 return (EINVAL); 674 if (len != 0) { 675 iov.iov_base = (void *)ur->ucr_data; 676 iov.iov_len = len; 677 uio.uio_iov = &iov; 678 uio.uio_iovcnt = 1; 679 uio.uio_resid = len; 680 uio.uio_offset = 0; 681 uio.uio_rw = 682 ur->ucr_request.bmRequestType & UT_READ ? 683 UIO_READ : UIO_WRITE; 684 uio.uio_vmspace = l->l_proc->p_vmspace; 685 ptr = malloc(len, M_TEMP, M_WAITOK); 686 if (uio.uio_rw == UIO_WRITE) { 687 error = uiomove(ptr, len, &uio); 688 if (error) 689 goto ret; 690 } 691 } 692 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 693 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 694 USBD_DEFAULT_TIMEOUT); 695 if (err) { 696 error = EIO; 697 goto ret; 698 } 699 if (len > ur->ucr_actlen) 700 len = ur->ucr_actlen; 701 if (len != 0) { 702 if (uio.uio_rw == UIO_READ) { 703 error = uiomove(ptr, len, &uio); 704 if (error) 705 goto ret; 706 } 707 } 708 ret: 709 if (ptr) 710 free(ptr, M_TEMP); 711 return (error); 712 } 713 714 case USB_DEVICEINFO: 715 { 716 usbd_device_handle dev; 717 struct usb_device_info *di = (void *)data; 718 int addr = di->udi_addr; 719 720 if (addr < 0 || addr >= USB_MAX_DEVICES) 721 return EINVAL; 722 if ((dev = sc->sc_bus->devices[addr]) == NULL) 723 return ENXIO; 724 usbd_fill_deviceinfo(dev, di, 1); 725 break; 726 } 727 728 #ifdef COMPAT_30 729 case USB_DEVICEINFO_OLD: 730 { 731 usbd_device_handle dev; 732 struct usb_device_info_old *di = (void *)data; 733 int addr = di->udi_addr; 734 735 if (addr < 1 || addr >= USB_MAX_DEVICES) 736 return EINVAL; 737 if ((dev = sc->sc_bus->devices[addr]) == NULL) 738 return ENXIO; 739 usbd_fill_deviceinfo_old(dev, di, 1); 740 break; 741 } 742 #endif 743 744 case USB_DEVICESTATS: 745 *(struct usb_device_stats *)data = sc->sc_bus->stats; 746 break; 747 748 default: 749 return (EINVAL); 750 } 751 return (0); 752 } 753 754 int 755 usbpoll(dev_t dev, int events, struct lwp *l) 756 { 757 int revents, mask; 758 759 if (minor(dev) == USB_DEV_MINOR) { 760 revents = 0; 761 mask = POLLIN | POLLRDNORM; 762 763 mutex_enter(&usb_event_lock); 764 if (events & mask && usb_nevents > 0) 765 revents |= events & mask; 766 if (revents == 0 && events & mask) 767 selrecord(l, &usb_selevent); 768 mutex_exit(&usb_event_lock); 769 770 return (revents); 771 } else { 772 return (0); 773 } 774 } 775 776 static void 777 filt_usbrdetach(struct knote *kn) 778 { 779 780 mutex_enter(&usb_event_lock); 781 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 782 mutex_exit(&usb_event_lock); 783 } 784 785 static int 786 filt_usbread(struct knote *kn, long hint) 787 { 788 789 if (usb_nevents == 0) 790 return (0); 791 792 kn->kn_data = sizeof(struct usb_event); 793 return (1); 794 } 795 796 static const struct filterops usbread_filtops = 797 { 1, NULL, filt_usbrdetach, filt_usbread }; 798 799 int 800 usbkqfilter(dev_t dev, struct knote *kn) 801 { 802 struct klist *klist; 803 804 switch (kn->kn_filter) { 805 case EVFILT_READ: 806 if (minor(dev) != USB_DEV_MINOR) 807 return (1); 808 klist = &usb_selevent.sel_klist; 809 kn->kn_fop = &usbread_filtops; 810 break; 811 812 default: 813 return (EINVAL); 814 } 815 816 kn->kn_hook = NULL; 817 818 mutex_enter(&usb_event_lock); 819 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 820 mutex_exit(&usb_event_lock); 821 822 return (0); 823 } 824 825 /* Explore device tree from the root. */ 826 Static void 827 usb_discover(struct usb_softc *sc) 828 { 829 830 KASSERT(mutex_owned(sc->sc_bus->lock)); 831 832 DPRINTFN(2,("usb_discover\n")); 833 if (usb_noexplore > 1) 834 return; 835 /* 836 * We need mutual exclusion while traversing the device tree, 837 * but this is guaranteed since this function is only called 838 * from the event thread for the controller. 839 * 840 * Also, we now have sc_bus->lock held. 841 */ 842 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 843 sc->sc_bus->needs_explore = 0; 844 mutex_exit(sc->sc_bus->lock); 845 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 846 mutex_enter(sc->sc_bus->lock); 847 } 848 } 849 850 void 851 usb_needs_explore(usbd_device_handle dev) 852 { 853 DPRINTFN(2,("usb_needs_explore\n")); 854 mutex_enter(dev->bus->lock); 855 dev->bus->needs_explore = 1; 856 cv_signal(&dev->bus->needs_explore_cv); 857 mutex_exit(dev->bus->lock); 858 } 859 860 void 861 usb_needs_reattach(usbd_device_handle dev) 862 { 863 DPRINTFN(2,("usb_needs_reattach\n")); 864 mutex_enter(dev->bus->lock); 865 dev->powersrc->reattach = 1; 866 dev->bus->needs_explore = 1; 867 cv_signal(&dev->bus->needs_explore_cv); 868 mutex_exit(dev->bus->lock); 869 } 870 871 /* Called at with usb_event_lock held. */ 872 int 873 usb_get_next_event(struct usb_event *ue) 874 { 875 struct usb_event_q *ueq; 876 877 KASSERT(mutex_owned(&usb_event_lock)); 878 879 if (usb_nevents <= 0) 880 return (0); 881 ueq = SIMPLEQ_FIRST(&usb_events); 882 #ifdef DIAGNOSTIC 883 if (ueq == NULL) { 884 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 885 usb_nevents = 0; 886 return (0); 887 } 888 #endif 889 if (ue) 890 *ue = ueq->ue; 891 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 892 usb_free_event((struct usb_event *)(void *)ueq); 893 usb_nevents--; 894 return (1); 895 } 896 897 void 898 usbd_add_dev_event(int type, usbd_device_handle udev) 899 { 900 struct usb_event *ue = usb_alloc_event(); 901 902 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 903 usb_add_event(type, ue); 904 } 905 906 void 907 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 908 { 909 struct usb_event *ue = usb_alloc_event(); 910 911 ue->u.ue_driver.ue_cookie = udev->cookie; 912 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 913 sizeof ue->u.ue_driver.ue_devname); 914 usb_add_event(type, ue); 915 } 916 917 Static struct usb_event * 918 usb_alloc_event(void) 919 { 920 /* Yes, this is right; we allocate enough so that we can use it later */ 921 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 922 } 923 924 Static void 925 usb_free_event(struct usb_event *uep) 926 { 927 free(uep, M_USBDEV); 928 } 929 930 Static void 931 usb_add_event(int type, struct usb_event *uep) 932 { 933 struct usb_event_q *ueq; 934 struct timeval thetime; 935 936 microtime(&thetime); 937 /* Don't want to wait here with usb_event_lock held */ 938 ueq = (struct usb_event_q *)(void *)uep; 939 ueq->ue = *uep; 940 ueq->ue.ue_type = type; 941 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 942 943 mutex_enter(&usb_event_lock); 944 if (++usb_nevents >= USB_MAX_EVENTS) { 945 /* Too many queued events, drop an old one. */ 946 DPRINTFN(-1,("usb: event dropped\n")); 947 (void)usb_get_next_event(0); 948 } 949 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 950 cv_signal(&usb_event_cv); 951 selnotify(&usb_selevent, 0, 0); 952 if (usb_async_proc != NULL) { 953 kpreempt_disable(); 954 softint_schedule(usb_async_sih); 955 kpreempt_enable(); 956 } 957 mutex_exit(&usb_event_lock); 958 } 959 960 Static void 961 usb_async_intr(void *cookie) 962 { 963 proc_t *proc; 964 965 mutex_enter(proc_lock); 966 if ((proc = usb_async_proc) != NULL) 967 psignal(proc, SIGIO); 968 mutex_exit(proc_lock); 969 } 970 971 Static void 972 usb_soft_intr(void *arg) 973 { 974 usbd_bus_handle bus = arg; 975 976 mutex_enter(bus->lock); 977 (*bus->methods->soft_intr)(bus); 978 mutex_exit(bus->lock); 979 } 980 981 void 982 usb_schedsoftintr(usbd_bus_handle bus) 983 { 984 985 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 986 987 if (bus->use_polling) { 988 bus->methods->soft_intr(bus); 989 } else { 990 kpreempt_disable(); 991 softint_schedule(bus->soft); 992 kpreempt_enable(); 993 } 994 } 995 996 int 997 usb_activate(device_t self, enum devact act) 998 { 999 struct usb_softc *sc = device_private(self); 1000 1001 switch (act) { 1002 case DVACT_DEACTIVATE: 1003 sc->sc_dying = 1; 1004 return 0; 1005 default: 1006 return EOPNOTSUPP; 1007 } 1008 } 1009 1010 void 1011 usb_childdet(device_t self, device_t child) 1012 { 1013 int i; 1014 struct usb_softc *sc = device_private(self); 1015 struct usbd_device *dev; 1016 1017 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1018 return; 1019 1020 for (i = 0; i < dev->subdevlen; i++) 1021 if (dev->subdevs[i] == child) 1022 dev->subdevs[i] = NULL; 1023 } 1024 1025 int 1026 usb_detach(device_t self, int flags) 1027 { 1028 struct usb_softc *sc = device_private(self); 1029 struct usb_event *ue; 1030 int rc; 1031 1032 DPRINTF(("usb_detach: start\n")); 1033 1034 /* Make all devices disconnect. */ 1035 if (sc->sc_port.device != NULL && 1036 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1037 return rc; 1038 1039 pmf_device_deregister(self); 1040 /* Kill off event thread. */ 1041 sc->sc_dying = 1; 1042 while (sc->sc_event_thread != NULL) { 1043 mutex_enter(sc->sc_bus->lock); 1044 cv_signal(&sc->sc_bus->needs_explore_cv); 1045 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1046 sc->sc_bus->lock, hz * 60); 1047 mutex_exit(sc->sc_bus->lock); 1048 } 1049 DPRINTF(("usb_detach: event thread dead\n")); 1050 1051 if (sc->sc_bus->soft != NULL) { 1052 softint_disestablish(sc->sc_bus->soft); 1053 sc->sc_bus->soft = NULL; 1054 } 1055 1056 ue = usb_alloc_event(); 1057 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1058 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1059 1060 cv_destroy(&sc->sc_bus->needs_explore_cv); 1061 1062 return (0); 1063 } 1064 1065 #ifdef COMPAT_30 1066 Static void 1067 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1068 const struct usb_device_info *ue) 1069 { 1070 const unsigned char *p; 1071 unsigned char *q; 1072 int i, n; 1073 1074 uo->udi_bus = ue->udi_bus; 1075 uo->udi_addr = ue->udi_addr; 1076 uo->udi_cookie = ue->udi_cookie; 1077 for (i = 0, p = (const unsigned char *)ue->udi_product, 1078 q = (unsigned char *)uo->udi_product; 1079 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1080 if (*p < 0x80) 1081 q[i++] = *p; 1082 else { 1083 q[i++] = '?'; 1084 if ((*p & 0xe0) == 0xe0) 1085 p++; 1086 p++; 1087 } 1088 } 1089 q[i] = 0; 1090 1091 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1092 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1093 if (* p < 0x80) 1094 q[i++] = *p; 1095 else { 1096 q[i++] = '?'; 1097 p++; 1098 if ((*p & 0xe0) == 0xe0) 1099 p++; 1100 } 1101 } 1102 q[i] = 0; 1103 1104 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1105 1106 uo->udi_productNo = ue->udi_productNo; 1107 uo->udi_vendorNo = ue->udi_vendorNo; 1108 uo->udi_releaseNo = ue->udi_releaseNo; 1109 uo->udi_class = ue->udi_class; 1110 uo->udi_subclass = ue->udi_subclass; 1111 uo->udi_protocol = ue->udi_protocol; 1112 uo->udi_config = ue->udi_config; 1113 uo->udi_speed = ue->udi_speed; 1114 uo->udi_power = ue->udi_power; 1115 uo->udi_nports = ue->udi_nports; 1116 1117 for (n=0; n<USB_MAX_DEVNAMES; n++) 1118 memcpy(uo->udi_devnames[n], 1119 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1120 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1121 } 1122 #endif 1123
Indexes created Wed Sep 24 02:09:48 GMT 2025