usb.c revision 1.155
1 /* $NetBSD: usb.c,v 1.155 2014/08/12 13:36:40 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 1.155 2014/08/12 13:36:40 skrll 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 case USBREV_3_0: 207 break; 208 default: 209 aprint_error(", not supported\n"); 210 sc->sc_dying = 1; 211 return; 212 } 213 aprint_normal("\n"); 214 215 /* XXX we should have our own level */ 216 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 217 usb_soft_intr, sc->sc_bus); 218 if (sc->sc_bus->soft == NULL) { 219 aprint_error("%s: can't register softintr\n", 220 device_xname(self)); 221 sc->sc_dying = 1; 222 return; 223 } 224 225 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 226 KASSERT(sc->sc_bus->lock != NULL); 227 228 RUN_ONCE(&init_control, usb_once_init); 229 config_interrupts(self, usb_doattach); 230 } 231 232 static int 233 usb_once_init(void) 234 { 235 struct usb_taskq *taskq; 236 int i; 237 238 selinit(&usb_selevent); 239 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 240 cv_init(&usb_event_cv, "usbrea"); 241 242 for (i = 0; i < USB_NUM_TASKQS; i++) { 243 taskq = &usb_taskq[i]; 244 245 TAILQ_INIT(&taskq->tasks); 246 /* 247 * Since USB task methods usb_{add,rem}_task are callable 248 * from any context, we have to make this lock a spinlock. 249 */ 250 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 251 cv_init(&taskq->cv, "usbtsk"); 252 taskq->name = taskq_names[i]; 253 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 254 usb_task_thread, taskq, &taskq->task_thread_lwp, 255 "%s", taskq->name)) { 256 printf("unable to create task thread: %s\n", taskq->name); 257 panic("usb_create_event_thread task"); 258 } 259 /* 260 * XXX we should make sure these threads are alive before 261 * end up using them in usb_doattach(). 262 */ 263 } 264 return 0; 265 } 266 267 static void 268 usb_doattach(device_t self) 269 { 270 struct usb_softc *sc = device_private(self); 271 usbd_device_handle dev; 272 usbd_status err; 273 int speed; 274 struct usb_event *ue; 275 276 DPRINTF(("usbd_doattach\n")); 277 278 sc->sc_bus->usbctl = self; 279 sc->sc_port.power = USB_MAX_POWER; 280 281 switch (sc->sc_bus->usbrev) { 282 case USBREV_1_0: 283 case USBREV_1_1: 284 speed = USB_SPEED_FULL; 285 break; 286 case USBREV_2_0: 287 speed = USB_SPEED_HIGH; 288 break; 289 case USBREV_3_0: 290 speed = USB_SPEED_SUPER; 291 break; 292 default: 293 panic("usb_doattach"); 294 } 295 296 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 297 298 ue = usb_alloc_event(); 299 ue->u.ue_ctrlr.ue_bus = device_unit(self); 300 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 301 302 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 303 &sc->sc_port); 304 if (!err) { 305 dev = sc->sc_port.device; 306 if (dev->hub == NULL) { 307 sc->sc_dying = 1; 308 aprint_error("%s: root device is not a hub\n", 309 device_xname(self)); 310 return; 311 } 312 sc->sc_bus->root_hub = dev; 313 usb_create_event_thread(self); 314 #if 1 315 /* 316 * Turning this code off will delay attachment of USB devices 317 * until the USB event thread is running, which means that 318 * the keyboard will not work until after cold boot. 319 */ 320 if (cold && (device_cfdata(self)->cf_flags & 1)) 321 dev->hub->explore(sc->sc_bus->root_hub); 322 #endif 323 } else { 324 aprint_error("%s: root hub problem, error=%s\n", 325 device_xname(self), usbd_errstr(err)); 326 sc->sc_dying = 1; 327 } 328 329 config_pending_incr(self); 330 331 if (!pmf_device_register(self, NULL, NULL)) 332 aprint_error_dev(self, "couldn't establish power handler\n"); 333 334 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 335 usb_async_intr, NULL); 336 337 return; 338 } 339 340 void 341 usb_create_event_thread(device_t self) 342 { 343 struct usb_softc *sc = device_private(self); 344 345 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 346 usb_event_thread, sc, &sc->sc_event_thread, 347 "%s", device_xname(self))) { 348 printf("%s: unable to create event thread for\n", 349 device_xname(self)); 350 panic("usb_create_event_thread"); 351 } 352 } 353 354 /* 355 * Add a task to be performed by the task thread. This function can be 356 * called from any context and the task will be executed in a process 357 * context ASAP. 358 */ 359 void 360 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 361 { 362 struct usb_taskq *taskq; 363 364 KASSERT(0 <= queue); 365 KASSERT(queue < USB_NUM_TASKQS); 366 taskq = &usb_taskq[queue]; 367 mutex_enter(&taskq->lock); 368 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 369 USB_NUM_TASKQS) { 370 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 371 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 372 cv_signal(&taskq->cv); 373 } else { 374 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 375 } 376 mutex_exit(&taskq->lock); 377 } 378 379 /* 380 * XXX This does not wait for completion! Most uses need such an 381 * operation. Urgh... 382 */ 383 void 384 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 385 { 386 unsigned queue; 387 388 while ((queue = task->queue) != USB_NUM_TASKQS) { 389 struct usb_taskq *taskq = &usb_taskq[queue]; 390 mutex_enter(&taskq->lock); 391 if (__predict_true(task->queue == queue)) { 392 TAILQ_REMOVE(&taskq->tasks, task, next); 393 task->queue = USB_NUM_TASKQS; 394 mutex_exit(&taskq->lock); 395 break; 396 } 397 mutex_exit(&taskq->lock); 398 } 399 } 400 401 void 402 usb_event_thread(void *arg) 403 { 404 struct usb_softc *sc = arg; 405 406 DPRINTF(("usb_event_thread: start\n")); 407 408 /* 409 * In case this controller is a companion controller to an 410 * EHCI controller we need to wait until the EHCI controller 411 * has grabbed the port. 412 * XXX It would be nicer to do this with a tsleep(), but I don't 413 * know how to synchronize the creation of the threads so it 414 * will work. 415 */ 416 usb_delay_ms(sc->sc_bus, 500); 417 418 /* Make sure first discover does something. */ 419 mutex_enter(sc->sc_bus->lock); 420 sc->sc_bus->needs_explore = 1; 421 usb_discover(sc); 422 mutex_exit(sc->sc_bus->lock); 423 config_pending_decr(sc->sc_bus->usbctl); 424 425 mutex_enter(sc->sc_bus->lock); 426 while (!sc->sc_dying) { 427 if (usb_noexplore < 2) 428 usb_discover(sc); 429 430 cv_timedwait(&sc->sc_bus->needs_explore_cv, 431 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 432 433 DPRINTFN(2,("usb_event_thread: woke up\n")); 434 } 435 sc->sc_event_thread = NULL; 436 437 /* In case parent is waiting for us to exit. */ 438 cv_signal(&sc->sc_bus->needs_explore_cv); 439 mutex_exit(sc->sc_bus->lock); 440 441 DPRINTF(("usb_event_thread: exit\n")); 442 kthread_exit(0); 443 } 444 445 void 446 usb_task_thread(void *arg) 447 { 448 struct usb_task *task; 449 struct usb_taskq *taskq; 450 bool mpsafe; 451 452 taskq = arg; 453 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 454 455 mutex_enter(&taskq->lock); 456 for (;;) { 457 task = TAILQ_FIRST(&taskq->tasks); 458 if (task == NULL) { 459 cv_wait(&taskq->cv, &taskq->lock); 460 task = TAILQ_FIRST(&taskq->tasks); 461 } 462 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 463 if (task != NULL) { 464 mpsafe = ISSET(task->flags, USB_TASKQ_MPSAFE); 465 TAILQ_REMOVE(&taskq->tasks, task, next); 466 task->queue = USB_NUM_TASKQS; 467 mutex_exit(&taskq->lock); 468 469 if (!mpsafe) 470 KERNEL_LOCK(1, curlwp); 471 task->fun(task->arg); 472 /* Can't dereference task after this point. */ 473 if (!mpsafe) 474 KERNEL_UNLOCK_ONE(curlwp); 475 476 mutex_enter(&taskq->lock); 477 } 478 } 479 mutex_exit(&taskq->lock); 480 } 481 482 int 483 usbctlprint(void *aux, const char *pnp) 484 { 485 /* only "usb"es can attach to host controllers */ 486 if (pnp) 487 aprint_normal("usb at %s", pnp); 488 489 return (UNCONF); 490 } 491 492 int 493 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 494 { 495 int unit = minor(dev); 496 struct usb_softc *sc; 497 498 if (unit == USB_DEV_MINOR) { 499 if (usb_dev_open) 500 return (EBUSY); 501 usb_dev_open = 1; 502 mutex_enter(proc_lock); 503 usb_async_proc = 0; 504 mutex_exit(proc_lock); 505 return (0); 506 } 507 508 sc = device_lookup_private(&usb_cd, unit); 509 if (!sc) 510 return (ENXIO); 511 512 if (sc->sc_dying) 513 return (EIO); 514 515 return (0); 516 } 517 518 int 519 usbread(dev_t dev, struct uio *uio, int flag) 520 { 521 struct usb_event *ue; 522 #ifdef COMPAT_30 523 struct usb_event_old *ueo = NULL; /* XXXGCC */ 524 int useold = 0; 525 #endif 526 int error, n; 527 528 if (minor(dev) != USB_DEV_MINOR) 529 return (ENXIO); 530 531 switch (uio->uio_resid) { 532 #ifdef COMPAT_30 533 case sizeof(struct usb_event_old): 534 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 535 M_WAITOK|M_ZERO); 536 useold = 1; 537 /* FALLTHRU */ 538 #endif 539 case sizeof(struct usb_event): 540 ue = usb_alloc_event(); 541 break; 542 default: 543 return (EINVAL); 544 } 545 546 error = 0; 547 mutex_enter(&usb_event_lock); 548 for (;;) { 549 n = usb_get_next_event(ue); 550 if (n != 0) 551 break; 552 if (flag & IO_NDELAY) { 553 error = EWOULDBLOCK; 554 break; 555 } 556 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 557 if (error) 558 break; 559 } 560 mutex_exit(&usb_event_lock); 561 if (!error) { 562 #ifdef COMPAT_30 563 if (useold) { /* copy fields to old struct */ 564 ueo->ue_type = ue->ue_type; 565 memcpy(&ueo->ue_time, &ue->ue_time, 566 sizeof(struct timespec)); 567 switch (ue->ue_type) { 568 case USB_EVENT_DEVICE_ATTACH: 569 case USB_EVENT_DEVICE_DETACH: 570 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 571 break; 572 573 case USB_EVENT_CTRLR_ATTACH: 574 case USB_EVENT_CTRLR_DETACH: 575 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 576 break; 577 578 case USB_EVENT_DRIVER_ATTACH: 579 case USB_EVENT_DRIVER_DETACH: 580 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 581 memcpy(ueo->u.ue_driver.ue_devname, 582 ue->u.ue_driver.ue_devname, 583 sizeof(ue->u.ue_driver.ue_devname)); 584 break; 585 default: 586 ; 587 } 588 589 error = uiomove((void *)ueo, sizeof *ueo, uio); 590 } else 591 #endif 592 error = uiomove((void *)ue, sizeof *ue, uio); 593 } 594 usb_free_event(ue); 595 #ifdef COMPAT_30 596 if (useold) 597 free(ueo, M_USBDEV); 598 #endif 599 600 return (error); 601 } 602 603 int 604 usbclose(dev_t dev, int flag, int mode, 605 struct lwp *l) 606 { 607 int unit = minor(dev); 608 609 if (unit == USB_DEV_MINOR) { 610 mutex_enter(proc_lock); 611 usb_async_proc = 0; 612 mutex_exit(proc_lock); 613 usb_dev_open = 0; 614 } 615 616 return (0); 617 } 618 619 int 620 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 621 { 622 struct usb_softc *sc; 623 int unit = minor(devt); 624 625 if (unit == USB_DEV_MINOR) { 626 switch (cmd) { 627 case FIONBIO: 628 /* All handled in the upper FS layer. */ 629 return (0); 630 631 case FIOASYNC: 632 mutex_enter(proc_lock); 633 if (*(int *)data) 634 usb_async_proc = l->l_proc; 635 else 636 usb_async_proc = 0; 637 mutex_exit(proc_lock); 638 return (0); 639 640 default: 641 return (EINVAL); 642 } 643 } 644 645 sc = device_lookup_private(&usb_cd, unit); 646 647 if (sc->sc_dying) 648 return (EIO); 649 650 switch (cmd) { 651 #ifdef USB_DEBUG 652 case USB_SETDEBUG: 653 if (!(flag & FWRITE)) 654 return (EBADF); 655 usbdebug = ((*(int *)data) & 0x000000ff); 656 break; 657 #endif /* USB_DEBUG */ 658 case USB_REQUEST: 659 { 660 struct usb_ctl_request *ur = (void *)data; 661 int len = UGETW(ur->ucr_request.wLength); 662 struct iovec iov; 663 struct uio uio; 664 void *ptr = 0; 665 int addr = ur->ucr_addr; 666 usbd_status err; 667 int error = 0; 668 669 if (!(flag & FWRITE)) 670 return (EBADF); 671 672 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 673 if (len < 0 || len > 32768) 674 return (EINVAL); 675 if (addr < 0 || addr >= USB_MAX_DEVICES || 676 sc->sc_bus->devices[addr] == NULL) 677 return (EINVAL); 678 if (len != 0) { 679 iov.iov_base = (void *)ur->ucr_data; 680 iov.iov_len = len; 681 uio.uio_iov = &iov; 682 uio.uio_iovcnt = 1; 683 uio.uio_resid = len; 684 uio.uio_offset = 0; 685 uio.uio_rw = 686 ur->ucr_request.bmRequestType & UT_READ ? 687 UIO_READ : UIO_WRITE; 688 uio.uio_vmspace = l->l_proc->p_vmspace; 689 ptr = malloc(len, M_TEMP, M_WAITOK); 690 if (uio.uio_rw == UIO_WRITE) { 691 error = uiomove(ptr, len, &uio); 692 if (error) 693 goto ret; 694 } 695 } 696 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 697 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 698 USBD_DEFAULT_TIMEOUT); 699 if (err) { 700 error = EIO; 701 goto ret; 702 } 703 if (len > ur->ucr_actlen) 704 len = ur->ucr_actlen; 705 if (len != 0) { 706 if (uio.uio_rw == UIO_READ) { 707 error = uiomove(ptr, len, &uio); 708 if (error) 709 goto ret; 710 } 711 } 712 ret: 713 if (ptr) 714 free(ptr, M_TEMP); 715 return (error); 716 } 717 718 case USB_DEVICEINFO: 719 { 720 usbd_device_handle dev; 721 struct usb_device_info *di = (void *)data; 722 int addr = di->udi_addr; 723 724 if (addr < 0 || addr >= USB_MAX_DEVICES) 725 return EINVAL; 726 if ((dev = sc->sc_bus->devices[addr]) == NULL) 727 return ENXIO; 728 usbd_fill_deviceinfo(dev, di, 1); 729 break; 730 } 731 732 #ifdef COMPAT_30 733 case USB_DEVICEINFO_OLD: 734 { 735 usbd_device_handle dev; 736 struct usb_device_info_old *di = (void *)data; 737 int addr = di->udi_addr; 738 739 if (addr < 1 || addr >= USB_MAX_DEVICES) 740 return EINVAL; 741 if ((dev = sc->sc_bus->devices[addr]) == NULL) 742 return ENXIO; 743 usbd_fill_deviceinfo_old(dev, di, 1); 744 break; 745 } 746 #endif 747 748 case USB_DEVICESTATS: 749 *(struct usb_device_stats *)data = sc->sc_bus->stats; 750 break; 751 752 default: 753 return (EINVAL); 754 } 755 return (0); 756 } 757 758 int 759 usbpoll(dev_t dev, int events, struct lwp *l) 760 { 761 int revents, mask; 762 763 if (minor(dev) == USB_DEV_MINOR) { 764 revents = 0; 765 mask = POLLIN | POLLRDNORM; 766 767 mutex_enter(&usb_event_lock); 768 if (events & mask && usb_nevents > 0) 769 revents |= events & mask; 770 if (revents == 0 && events & mask) 771 selrecord(l, &usb_selevent); 772 mutex_exit(&usb_event_lock); 773 774 return (revents); 775 } else { 776 return (0); 777 } 778 } 779 780 static void 781 filt_usbrdetach(struct knote *kn) 782 { 783 784 mutex_enter(&usb_event_lock); 785 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 786 mutex_exit(&usb_event_lock); 787 } 788 789 static int 790 filt_usbread(struct knote *kn, long hint) 791 { 792 793 if (usb_nevents == 0) 794 return (0); 795 796 kn->kn_data = sizeof(struct usb_event); 797 return (1); 798 } 799 800 static const struct filterops usbread_filtops = 801 { 1, NULL, filt_usbrdetach, filt_usbread }; 802 803 int 804 usbkqfilter(dev_t dev, struct knote *kn) 805 { 806 struct klist *klist; 807 808 switch (kn->kn_filter) { 809 case EVFILT_READ: 810 if (minor(dev) != USB_DEV_MINOR) 811 return (1); 812 klist = &usb_selevent.sel_klist; 813 kn->kn_fop = &usbread_filtops; 814 break; 815 816 default: 817 return (EINVAL); 818 } 819 820 kn->kn_hook = NULL; 821 822 mutex_enter(&usb_event_lock); 823 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 824 mutex_exit(&usb_event_lock); 825 826 return (0); 827 } 828 829 /* Explore device tree from the root. */ 830 Static void 831 usb_discover(struct usb_softc *sc) 832 { 833 834 KASSERT(mutex_owned(sc->sc_bus->lock)); 835 836 DPRINTFN(2,("usb_discover\n")); 837 if (usb_noexplore > 1) 838 return; 839 /* 840 * We need mutual exclusion while traversing the device tree, 841 * but this is guaranteed since this function is only called 842 * from the event thread for the controller. 843 * 844 * Also, we now have sc_bus->lock held. 845 */ 846 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 847 sc->sc_bus->needs_explore = 0; 848 mutex_exit(sc->sc_bus->lock); 849 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 850 mutex_enter(sc->sc_bus->lock); 851 } 852 } 853 854 void 855 usb_needs_explore(usbd_device_handle dev) 856 { 857 DPRINTFN(2,("usb_needs_explore\n")); 858 mutex_enter(dev->bus->lock); 859 dev->bus->needs_explore = 1; 860 cv_signal(&dev->bus->needs_explore_cv); 861 mutex_exit(dev->bus->lock); 862 } 863 864 void 865 usb_needs_reattach(usbd_device_handle dev) 866 { 867 DPRINTFN(2,("usb_needs_reattach\n")); 868 mutex_enter(dev->bus->lock); 869 dev->powersrc->reattach = 1; 870 dev->bus->needs_explore = 1; 871 cv_signal(&dev->bus->needs_explore_cv); 872 mutex_exit(dev->bus->lock); 873 } 874 875 /* Called at with usb_event_lock held. */ 876 int 877 usb_get_next_event(struct usb_event *ue) 878 { 879 struct usb_event_q *ueq; 880 881 KASSERT(mutex_owned(&usb_event_lock)); 882 883 if (usb_nevents <= 0) 884 return (0); 885 ueq = SIMPLEQ_FIRST(&usb_events); 886 #ifdef DIAGNOSTIC 887 if (ueq == NULL) { 888 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 889 usb_nevents = 0; 890 return (0); 891 } 892 #endif 893 if (ue) 894 *ue = ueq->ue; 895 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 896 usb_free_event((struct usb_event *)(void *)ueq); 897 usb_nevents--; 898 return (1); 899 } 900 901 void 902 usbd_add_dev_event(int type, usbd_device_handle udev) 903 { 904 struct usb_event *ue = usb_alloc_event(); 905 906 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 907 usb_add_event(type, ue); 908 } 909 910 void 911 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 912 { 913 struct usb_event *ue = usb_alloc_event(); 914 915 ue->u.ue_driver.ue_cookie = udev->cookie; 916 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 917 sizeof ue->u.ue_driver.ue_devname); 918 usb_add_event(type, ue); 919 } 920 921 Static struct usb_event * 922 usb_alloc_event(void) 923 { 924 /* Yes, this is right; we allocate enough so that we can use it later */ 925 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 926 } 927 928 Static void 929 usb_free_event(struct usb_event *uep) 930 { 931 free(uep, M_USBDEV); 932 } 933 934 Static void 935 usb_add_event(int type, struct usb_event *uep) 936 { 937 struct usb_event_q *ueq; 938 struct timeval thetime; 939 940 microtime(&thetime); 941 /* Don't want to wait here with usb_event_lock held */ 942 ueq = (struct usb_event_q *)(void *)uep; 943 ueq->ue = *uep; 944 ueq->ue.ue_type = type; 945 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 946 947 mutex_enter(&usb_event_lock); 948 if (++usb_nevents >= USB_MAX_EVENTS) { 949 /* Too many queued events, drop an old one. */ 950 DPRINTFN(-1,("usb: event dropped\n")); 951 (void)usb_get_next_event(0); 952 } 953 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 954 cv_signal(&usb_event_cv); 955 selnotify(&usb_selevent, 0, 0); 956 if (usb_async_proc != NULL) { 957 kpreempt_disable(); 958 softint_schedule(usb_async_sih); 959 kpreempt_enable(); 960 } 961 mutex_exit(&usb_event_lock); 962 } 963 964 Static void 965 usb_async_intr(void *cookie) 966 { 967 proc_t *proc; 968 969 mutex_enter(proc_lock); 970 if ((proc = usb_async_proc) != NULL) 971 psignal(proc, SIGIO); 972 mutex_exit(proc_lock); 973 } 974 975 Static void 976 usb_soft_intr(void *arg) 977 { 978 usbd_bus_handle bus = arg; 979 980 mutex_enter(bus->lock); 981 (*bus->methods->soft_intr)(bus); 982 mutex_exit(bus->lock); 983 } 984 985 void 986 usb_schedsoftintr(usbd_bus_handle bus) 987 { 988 989 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 990 991 if (bus->use_polling) { 992 bus->methods->soft_intr(bus); 993 } else { 994 kpreempt_disable(); 995 softint_schedule(bus->soft); 996 kpreempt_enable(); 997 } 998 } 999 1000 int 1001 usb_activate(device_t self, enum devact act) 1002 { 1003 struct usb_softc *sc = device_private(self); 1004 1005 switch (act) { 1006 case DVACT_DEACTIVATE: 1007 sc->sc_dying = 1; 1008 return 0; 1009 default: 1010 return EOPNOTSUPP; 1011 } 1012 } 1013 1014 void 1015 usb_childdet(device_t self, device_t child) 1016 { 1017 int i; 1018 struct usb_softc *sc = device_private(self); 1019 struct usbd_device *dev; 1020 1021 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1022 return; 1023 1024 for (i = 0; i < dev->subdevlen; i++) 1025 if (dev->subdevs[i] == child) 1026 dev->subdevs[i] = NULL; 1027 } 1028 1029 int 1030 usb_detach(device_t self, int flags) 1031 { 1032 struct usb_softc *sc = device_private(self); 1033 struct usb_event *ue; 1034 int rc; 1035 1036 DPRINTF(("usb_detach: start\n")); 1037 1038 /* Make all devices disconnect. */ 1039 if (sc->sc_port.device != NULL && 1040 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1041 return rc; 1042 1043 pmf_device_deregister(self); 1044 /* Kill off event thread. */ 1045 sc->sc_dying = 1; 1046 while (sc->sc_event_thread != NULL) { 1047 mutex_enter(sc->sc_bus->lock); 1048 cv_signal(&sc->sc_bus->needs_explore_cv); 1049 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1050 sc->sc_bus->lock, hz * 60); 1051 mutex_exit(sc->sc_bus->lock); 1052 } 1053 DPRINTF(("usb_detach: event thread dead\n")); 1054 1055 if (sc->sc_bus->soft != NULL) { 1056 softint_disestablish(sc->sc_bus->soft); 1057 sc->sc_bus->soft = NULL; 1058 } 1059 1060 ue = usb_alloc_event(); 1061 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1062 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1063 1064 cv_destroy(&sc->sc_bus->needs_explore_cv); 1065 1066 return (0); 1067 } 1068 1069 #ifdef COMPAT_30 1070 Static void 1071 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1072 const struct usb_device_info *ue) 1073 { 1074 const unsigned char *p; 1075 unsigned char *q; 1076 int i, n; 1077 1078 uo->udi_bus = ue->udi_bus; 1079 uo->udi_addr = ue->udi_addr; 1080 uo->udi_cookie = ue->udi_cookie; 1081 for (i = 0, p = (const unsigned char *)ue->udi_product, 1082 q = (unsigned char *)uo->udi_product; 1083 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1084 if (*p < 0x80) 1085 q[i++] = *p; 1086 else { 1087 q[i++] = '?'; 1088 if ((*p & 0xe0) == 0xe0) 1089 p++; 1090 p++; 1091 } 1092 } 1093 q[i] = 0; 1094 1095 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1096 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1097 if (* p < 0x80) 1098 q[i++] = *p; 1099 else { 1100 q[i++] = '?'; 1101 p++; 1102 if ((*p & 0xe0) == 0xe0) 1103 p++; 1104 } 1105 } 1106 q[i] = 0; 1107 1108 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1109 1110 uo->udi_productNo = ue->udi_productNo; 1111 uo->udi_vendorNo = ue->udi_vendorNo; 1112 uo->udi_releaseNo = ue->udi_releaseNo; 1113 uo->udi_class = ue->udi_class; 1114 uo->udi_subclass = ue->udi_subclass; 1115 uo->udi_protocol = ue->udi_protocol; 1116 uo->udi_config = ue->udi_config; 1117 uo->udi_speed = ue->udi_speed; 1118 uo->udi_power = ue->udi_power; 1119 uo->udi_nports = ue->udi_nports; 1120 1121 for (n=0; n<USB_MAX_DEVNAMES; n++) 1122 memcpy(uo->udi_devnames[n], 1123 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1124 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1125 } 1126 #endif 1127
Indexes created Tue Sep 23 14:10:03 GMT 2025