usb.c revision 1.125.6.6
1 /* $NetBSD: usb.c,v 1.125.6.6 2012/02/20 02:12:24 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2002, 2008 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. 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 1.125.6.6 2012/02/20 02:12:24 mrg Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_usb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/device.h> 50 #include <sys/kthread.h> 51 #include <sys/proc.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/poll.h> 55 #include <sys/select.h> 56 #include <sys/vnode.h> 57 #include <sys/signalvar.h> 58 #include <sys/intr.h> 59 #include <sys/module.h> 60 61 #include <dev/usb/usb.h> 62 #include <dev/usb/usbdi.h> 63 #include <dev/usb/usbdi_util.h> 64 #include <dev/usb/usb_verbose.h> 65 66 #define USB_DEV_MINOR 255 67 68 #include <sys/bus.h> 69 70 #include <dev/usb/usbdivar.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #ifdef USB_DEBUG 74 #define DPRINTF(x) if (usbdebug) printf x 75 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 76 int usbdebug = 0; 77 /* 78 * 0 - do usual exploration 79 * 1 - do not use timeout exploration 80 * >1 - do no exploration 81 */ 82 int usb_noexplore = 0; 83 #else 84 #define DPRINTF(x) 85 #define DPRINTFN(n,x) 86 #define usb_noexplore 0 87 #endif 88 89 struct usb_softc { 90 #if 0 91 device_t sc_dev; /* base device */ 92 #endif 93 usbd_bus_handle sc_bus; /* USB controller */ 94 struct usbd_port sc_port; /* dummy port for root hub */ 95 96 struct lwp *sc_event_thread; 97 98 char sc_dying; 99 }; 100 101 struct usb_taskq { 102 TAILQ_HEAD(, usb_task) tasks; 103 kmutex_t lock; 104 kcondvar_t cv; 105 struct lwp *task_thread_lwp; 106 const char *name; 107 int taskcreated; /* task thread exists. */ 108 }; 109 110 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 111 112 dev_type_open(usbopen); 113 dev_type_close(usbclose); 114 dev_type_read(usbread); 115 dev_type_ioctl(usbioctl); 116 dev_type_poll(usbpoll); 117 dev_type_kqfilter(usbkqfilter); 118 119 const struct cdevsw usb_cdevsw = { 120 usbopen, usbclose, usbread, nowrite, usbioctl, 121 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 122 }; 123 124 Static void usb_discover(struct usb_softc *); 125 Static void usb_create_event_thread(device_t); 126 Static void usb_event_thread(void *); 127 Static void usb_task_thread(void *); 128 129 #define USB_MAX_EVENTS 100 130 struct usb_event_q { 131 struct usb_event ue; 132 SIMPLEQ_ENTRY(usb_event_q) next; 133 }; 134 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 135 SIMPLEQ_HEAD_INITIALIZER(usb_events); 136 Static int usb_nevents = 0; 137 Static struct selinfo usb_selevent; 138 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 139 Static void *usb_async_sih; 140 Static int usb_dev_open = 0; 141 Static struct usb_event *usb_alloc_event(void); 142 Static void usb_free_event(struct usb_event *); 143 Static void usb_add_event(int, struct usb_event *); 144 Static int usb_get_next_event(struct usb_event *); 145 Static void usb_async_intr(void *); 146 Static void usb_soft_intr(void *); 147 148 #ifdef COMPAT_30 149 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 150 #endif 151 152 Static const char *usbrev_str[] = USBREV_STR; 153 154 static int usb_match(device_t, cfdata_t, void *); 155 static void usb_attach(device_t, device_t, void *); 156 static int usb_detach(device_t, int); 157 static int usb_activate(device_t, enum devact); 158 static void usb_childdet(device_t, device_t); 159 static void usb_doattach(device_t); 160 161 extern struct cfdriver usb_cd; 162 163 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 164 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 165 DVF_DETACH_SHUTDOWN); 166 167 int 168 usb_match(device_t parent, cfdata_t match, void *aux) 169 { 170 DPRINTF(("usbd_match\n")); 171 return (UMATCH_GENERIC); 172 } 173 174 void 175 usb_attach(device_t parent, device_t self, void *aux) 176 { 177 struct usb_softc *sc = device_private(self); 178 int usbrev; 179 180 sc->sc_bus = aux; 181 usbrev = sc->sc_bus->usbrev; 182 183 aprint_naive("\n"); 184 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 185 switch (usbrev) { 186 case USBREV_1_0: 187 case USBREV_1_1: 188 case USBREV_2_0: 189 break; 190 default: 191 aprint_error(", not supported\n"); 192 sc->sc_dying = 1; 193 return; 194 } 195 aprint_normal("\n"); 196 197 config_interrupts(self, usb_doattach); 198 } 199 200 static void 201 usb_doattach(device_t self) 202 { 203 static bool usb_selevent_init; /* XXX */ 204 struct usb_softc *sc = device_private(self); 205 usbd_device_handle dev; 206 usbd_status err; 207 int speed; 208 struct usb_event *ue; 209 bool mpsafe = sc->sc_bus->methods->get_locks ? true : false; 210 211 if (!usb_selevent_init) { 212 selinit(&usb_selevent); 213 usb_selevent_init = true; 214 } 215 DPRINTF(("usbd_doattach\n")); 216 217 sc->sc_bus->usbctl = self; 218 sc->sc_port.power = USB_MAX_POWER; 219 220 switch (sc->sc_bus->usbrev) { 221 case USBREV_1_0: 222 case USBREV_1_1: 223 speed = USB_SPEED_FULL; 224 break; 225 case USBREV_2_0: 226 speed = USB_SPEED_HIGH; 227 break; 228 default: 229 panic("usb_doattach"); 230 } 231 232 if (mpsafe) { 233 sc->sc_bus->methods->get_locks(sc->sc_bus, 234 &sc->sc_bus->intr_lock, &sc->sc_bus->lock); 235 } else { 236 sc->sc_bus->intr_lock = sc->sc_bus->lock = NULL; 237 } 238 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 239 240 ue = usb_alloc_event(); 241 ue->u.ue_ctrlr.ue_bus = device_unit(self); 242 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 243 244 /* XXX we should have our own level */ 245 sc->sc_bus->soft = softint_establish( 246 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 247 usb_soft_intr, sc->sc_bus); 248 if (sc->sc_bus->soft == NULL) { 249 aprint_error("%s: can't register softintr\n", 250 device_xname(self)); 251 sc->sc_dying = 1; 252 return; 253 } 254 255 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 256 &sc->sc_port); 257 if (!err) { 258 dev = sc->sc_port.device; 259 if (dev->hub == NULL) { 260 sc->sc_dying = 1; 261 aprint_error("%s: root device is not a hub\n", 262 device_xname(self)); 263 return; 264 } 265 sc->sc_bus->root_hub = dev; 266 #if 1 267 /* 268 * Turning this code off will delay attachment of USB devices 269 * until the USB event thread is running, which means that 270 * the keyboard will not work until after cold boot. 271 */ 272 if (cold && (device_cfdata(self)->cf_flags & 1)) 273 dev->hub->explore(sc->sc_bus->root_hub); 274 #endif 275 } else { 276 aprint_error("%s: root hub problem, error=%d\n", 277 device_xname(self), err); 278 sc->sc_dying = 1; 279 } 280 281 config_pending_incr(); 282 usb_create_event_thread(self); 283 284 if (!pmf_device_register(self, NULL, NULL)) 285 aprint_error_dev(self, "couldn't establish power handler\n"); 286 287 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 288 usb_async_intr, NULL); 289 290 return; 291 } 292 293 static const char *taskq_names[] = USB_TASKQ_NAMES; 294 295 void 296 usb_create_event_thread(device_t self) 297 { 298 struct usb_softc *sc = device_private(self); 299 struct usb_taskq *taskq; 300 int i; 301 302 if (kthread_create(PRI_NONE, 0, NULL, usb_event_thread, sc, 303 &sc->sc_event_thread, "%s", device_xname(self))) { 304 printf("%s: unable to create event thread for\n", 305 device_xname(self)); 306 panic("usb_create_event_thread"); 307 } 308 for (i = 0; i < USB_NUM_TASKQS; i++) { 309 taskq = &usb_taskq[i]; 310 311 if (taskq->taskcreated) 312 continue; 313 314 TAILQ_INIT(&taskq->tasks); 315 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_NONE); 316 cv_init(&taskq->cv, "usbtsk"); 317 taskq->taskcreated = 1; 318 taskq->name = taskq_names[i]; 319 if (kthread_create(PRI_NONE, 0, NULL, usb_task_thread, 320 taskq, &taskq->task_thread_lwp, "%s", taskq->name)) { 321 printf("unable to create task thread: %s\n", taskq->name); 322 panic("usb_create_event_thread task"); 323 } 324 } 325 } 326 327 /* 328 * Add a task to be performed by the task thread. This function can be 329 * called from any context and the task will be executed in a process 330 * context ASAP. 331 */ 332 void 333 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 334 { 335 struct usb_taskq *taskq; 336 337 taskq = &usb_taskq[queue]; 338 mutex_enter(&taskq->lock); 339 if (task->queue == -1) { 340 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 341 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 342 task->queue = queue; 343 } else { 344 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 345 } 346 cv_signal(&taskq->cv); 347 mutex_exit(&taskq->lock); 348 } 349 350 void 351 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 352 { 353 struct usb_taskq *taskq; 354 355 taskq = &usb_taskq[task->queue]; 356 mutex_enter(&taskq->lock); 357 if (task->queue != -1) { 358 TAILQ_REMOVE(&taskq->tasks, task, next); 359 task->queue = -1; 360 } 361 mutex_exit(&taskq->lock); 362 } 363 364 void 365 usb_event_thread(void *arg) 366 { 367 struct usb_softc *sc = arg; 368 369 DPRINTF(("usb_event_thread: start\n")); 370 371 /* 372 * In case this controller is a companion controller to an 373 * EHCI controller we need to wait until the EHCI controller 374 * has grabbed the port. 375 * XXX It would be nicer to do this with a tsleep(), but I don't 376 * know how to synchronize the creation of the threads so it 377 * will work. 378 */ 379 usb_delay_ms(sc->sc_bus, 500); 380 381 /* Make sure first discover does something. */ 382 if (sc->sc_bus->lock) 383 mutex_enter(sc->sc_bus->lock); 384 sc->sc_bus->needs_explore = 1; 385 usb_discover(sc); 386 if (sc->sc_bus->lock) 387 mutex_exit(sc->sc_bus->lock); 388 config_pending_decr(); 389 390 if (sc->sc_bus->lock) 391 mutex_enter(sc->sc_bus->lock); 392 while (!sc->sc_dying) { 393 if (usb_noexplore < 2) 394 usb_discover(sc); 395 396 if (sc->sc_bus->lock) 397 cv_timedwait(&sc->sc_bus->needs_explore_cv, 398 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 399 else 400 (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, 401 "usbevt", usb_noexplore ? 0 : hz * 60); 402 DPRINTFN(2,("usb_event_thread: woke up\n")); 403 } 404 sc->sc_event_thread = NULL; 405 406 /* In case parent is waiting for us to exit. */ 407 if (sc->sc_bus->lock) { 408 cv_signal(&sc->sc_bus->needs_explore_cv); 409 mutex_exit(sc->sc_bus->lock); 410 } else 411 wakeup(sc); 412 413 DPRINTF(("usb_event_thread: exit\n")); 414 kthread_exit(0); 415 } 416 417 void 418 usb_task_thread(void *arg) 419 { 420 struct usb_task *task; 421 struct usb_taskq *taskq; 422 423 taskq = arg; 424 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 425 426 mutex_enter(&taskq->lock); 427 for (;;) { 428 task = TAILQ_FIRST(&taskq->tasks); 429 if (task == NULL) { 430 cv_wait(&taskq->cv, &taskq->lock); 431 task = TAILQ_FIRST(&taskq->tasks); 432 } 433 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 434 if (task != NULL) { 435 TAILQ_REMOVE(&taskq->tasks, task, next); 436 task->queue = -1; 437 mutex_exit(&taskq->lock); 438 task->fun(task->arg); 439 mutex_enter(&taskq->lock); 440 } 441 } 442 mutex_exit(&taskq->lock); 443 } 444 445 int 446 usbctlprint(void *aux, const char *pnp) 447 { 448 /* only "usb"es can attach to host controllers */ 449 if (pnp) 450 aprint_normal("usb at %s", pnp); 451 452 return (UNCONF); 453 } 454 455 int 456 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 457 { 458 int unit = minor(dev); 459 struct usb_softc *sc; 460 461 if (unit == USB_DEV_MINOR) { 462 if (usb_dev_open) 463 return (EBUSY); 464 usb_dev_open = 1; 465 mutex_enter(proc_lock); 466 usb_async_proc = 0; 467 mutex_exit(proc_lock); 468 return (0); 469 } 470 471 sc = device_lookup_private(&usb_cd, unit); 472 if (!sc) 473 return (ENXIO); 474 475 if (sc->sc_dying) 476 return (EIO); 477 478 return (0); 479 } 480 481 int 482 usbread(dev_t dev, struct uio *uio, int flag) 483 { 484 struct usb_event *ue; 485 #ifdef COMPAT_30 486 struct usb_event_old *ueo = NULL; /* XXXGCC */ 487 #endif 488 int s, error, n, useold; 489 490 if (minor(dev) != USB_DEV_MINOR) 491 return (ENXIO); 492 493 useold = 0; 494 switch (uio->uio_resid) { 495 #ifdef COMPAT_30 496 case sizeof(struct usb_event_old): 497 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 498 M_WAITOK|M_ZERO); 499 useold = 1; 500 /* FALLTHRU */ 501 #endif 502 case sizeof(struct usb_event): 503 ue = usb_alloc_event(); 504 break; 505 default: 506 return (EINVAL); 507 } 508 509 error = 0; 510 s = splusb(); 511 for (;;) { 512 n = usb_get_next_event(ue); 513 if (n != 0) 514 break; 515 if (flag & IO_NDELAY) { 516 error = EWOULDBLOCK; 517 break; 518 } 519 error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); 520 if (error) 521 break; 522 } 523 splx(s); 524 if (!error) { 525 #ifdef COMPAT_30 526 if (useold) { /* copy fields to old struct */ 527 ueo->ue_type = ue->ue_type; 528 memcpy(&ueo->ue_time, &ue->ue_time, 529 sizeof(struct timespec)); 530 switch (ue->ue_type) { 531 case USB_EVENT_DEVICE_ATTACH: 532 case USB_EVENT_DEVICE_DETACH: 533 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 534 break; 535 536 case USB_EVENT_CTRLR_ATTACH: 537 case USB_EVENT_CTRLR_DETACH: 538 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 539 break; 540 541 case USB_EVENT_DRIVER_ATTACH: 542 case USB_EVENT_DRIVER_DETACH: 543 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 544 memcpy(ueo->u.ue_driver.ue_devname, 545 ue->u.ue_driver.ue_devname, 546 sizeof(ue->u.ue_driver.ue_devname)); 547 break; 548 default: 549 ; 550 } 551 552 error = uiomove((void *)ueo, sizeof *ueo, uio); 553 } else 554 #endif 555 error = uiomove((void *)ue, sizeof *ue, uio); 556 } 557 usb_free_event(ue); 558 #ifdef COMPAT_30 559 if (useold) 560 free(ueo, M_USBDEV); 561 #endif 562 563 return (error); 564 } 565 566 int 567 usbclose(dev_t dev, int flag, int mode, 568 struct lwp *l) 569 { 570 int unit = minor(dev); 571 572 if (unit == USB_DEV_MINOR) { 573 mutex_enter(proc_lock); 574 usb_async_proc = 0; 575 mutex_exit(proc_lock); 576 usb_dev_open = 0; 577 } 578 579 return (0); 580 } 581 582 int 583 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 584 { 585 struct usb_softc *sc; 586 int unit = minor(devt); 587 588 if (unit == USB_DEV_MINOR) { 589 switch (cmd) { 590 case FIONBIO: 591 /* All handled in the upper FS layer. */ 592 return (0); 593 594 case FIOASYNC: 595 mutex_enter(proc_lock); 596 if (*(int *)data) 597 usb_async_proc = l->l_proc; 598 else 599 usb_async_proc = 0; 600 mutex_exit(proc_lock); 601 return (0); 602 603 default: 604 return (EINVAL); 605 } 606 } 607 608 sc = device_lookup_private(&usb_cd, unit); 609 610 if (sc->sc_dying) 611 return (EIO); 612 613 switch (cmd) { 614 #ifdef USB_DEBUG 615 case USB_SETDEBUG: 616 if (!(flag & FWRITE)) 617 return (EBADF); 618 usbdebug = ((*(int *)data) & 0x000000ff); 619 break; 620 #endif /* USB_DEBUG */ 621 case USB_REQUEST: 622 { 623 struct usb_ctl_request *ur = (void *)data; 624 int len = UGETW(ur->ucr_request.wLength); 625 struct iovec iov; 626 struct uio uio; 627 void *ptr = 0; 628 int addr = ur->ucr_addr; 629 usbd_status err; 630 int error = 0; 631 632 if (!(flag & FWRITE)) 633 return (EBADF); 634 635 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 636 if (len < 0 || len > 32768) 637 return (EINVAL); 638 if (addr < 0 || addr >= USB_MAX_DEVICES || 639 sc->sc_bus->devices[addr] == 0) 640 return (EINVAL); 641 if (len != 0) { 642 iov.iov_base = (void *)ur->ucr_data; 643 iov.iov_len = len; 644 uio.uio_iov = &iov; 645 uio.uio_iovcnt = 1; 646 uio.uio_resid = len; 647 uio.uio_offset = 0; 648 uio.uio_rw = 649 ur->ucr_request.bmRequestType & UT_READ ? 650 UIO_READ : UIO_WRITE; 651 uio.uio_vmspace = l->l_proc->p_vmspace; 652 ptr = malloc(len, M_TEMP, M_WAITOK); 653 if (uio.uio_rw == UIO_WRITE) { 654 error = uiomove(ptr, len, &uio); 655 if (error) 656 goto ret; 657 } 658 } 659 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 660 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 661 USBD_DEFAULT_TIMEOUT); 662 if (err) { 663 error = EIO; 664 goto ret; 665 } 666 if (len > ur->ucr_actlen) 667 len = ur->ucr_actlen; 668 if (len != 0) { 669 if (uio.uio_rw == UIO_READ) { 670 error = uiomove(ptr, len, &uio); 671 if (error) 672 goto ret; 673 } 674 } 675 ret: 676 if (ptr) 677 free(ptr, M_TEMP); 678 return (error); 679 } 680 681 case USB_DEVICEINFO: 682 { 683 usbd_device_handle dev; 684 struct usb_device_info *di = (void *)data; 685 int addr = di->udi_addr; 686 687 if (addr < 1 || addr >= USB_MAX_DEVICES) 688 return EINVAL; 689 if ((dev = sc->sc_bus->devices[addr]) == NULL) 690 return ENXIO; 691 usbd_fill_deviceinfo(dev, di, 1); 692 break; 693 } 694 695 #ifdef COMPAT_30 696 case USB_DEVICEINFO_OLD: 697 { 698 usbd_device_handle dev; 699 struct usb_device_info_old *di = (void *)data; 700 int addr = di->udi_addr; 701 702 if (addr < 1 || addr >= USB_MAX_DEVICES) 703 return EINVAL; 704 if ((dev = sc->sc_bus->devices[addr]) == NULL) 705 return ENXIO; 706 usbd_fill_deviceinfo_old(dev, di, 1); 707 break; 708 } 709 #endif 710 711 case USB_DEVICESTATS: 712 *(struct usb_device_stats *)data = sc->sc_bus->stats; 713 break; 714 715 default: 716 return (EINVAL); 717 } 718 return (0); 719 } 720 721 int 722 usbpoll(dev_t dev, int events, struct lwp *l) 723 { 724 int revents, mask, s; 725 726 if (minor(dev) == USB_DEV_MINOR) { 727 revents = 0; 728 mask = POLLIN | POLLRDNORM; 729 730 s = splusb(); 731 if (events & mask && usb_nevents > 0) 732 revents |= events & mask; 733 if (revents == 0 && events & mask) 734 selrecord(l, &usb_selevent); 735 splx(s); 736 737 return (revents); 738 } else { 739 return (0); 740 } 741 } 742 743 static void 744 filt_usbrdetach(struct knote *kn) 745 { 746 int s; 747 748 s = splusb(); 749 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 750 splx(s); 751 } 752 753 static int 754 filt_usbread(struct knote *kn, long hint) 755 { 756 757 if (usb_nevents == 0) 758 return (0); 759 760 kn->kn_data = sizeof(struct usb_event); 761 return (1); 762 } 763 764 static const struct filterops usbread_filtops = 765 { 1, NULL, filt_usbrdetach, filt_usbread }; 766 767 int 768 usbkqfilter(dev_t dev, struct knote *kn) 769 { 770 struct klist *klist; 771 int s; 772 773 switch (kn->kn_filter) { 774 case EVFILT_READ: 775 if (minor(dev) != USB_DEV_MINOR) 776 return (1); 777 klist = &usb_selevent.sel_klist; 778 kn->kn_fop = &usbread_filtops; 779 break; 780 781 default: 782 return (EINVAL); 783 } 784 785 kn->kn_hook = NULL; 786 787 s = splusb(); 788 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 789 splx(s); 790 791 return (0); 792 } 793 794 /* Explore device tree from the root. */ 795 Static void 796 usb_discover(struct usb_softc *sc) 797 { 798 799 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 800 801 DPRINTFN(2,("usb_discover\n")); 802 if (usb_noexplore > 1) 803 return; 804 /* 805 * We need mutual exclusion while traversing the device tree, 806 * but this is guaranteed since this function is only called 807 * from the event thread for the controller. 808 * 809 * Also, we now have sc_bus->lock held for MPSAFE controllers. 810 */ 811 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 812 sc->sc_bus->needs_explore = 0; 813 if (sc->sc_bus->lock) 814 mutex_exit(sc->sc_bus->lock); 815 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 816 if (sc->sc_bus->lock) 817 mutex_enter(sc->sc_bus->lock); 818 } 819 } 820 821 void 822 usb_needs_explore(usbd_device_handle dev) 823 { 824 DPRINTFN(2,("usb_needs_explore\n")); 825 if (dev->bus->lock) 826 mutex_enter(dev->bus->lock); 827 dev->bus->needs_explore = 1; 828 if (dev->bus->lock) { 829 cv_signal(&dev->bus->needs_explore_cv); 830 mutex_exit(dev->bus->lock); 831 } else 832 wakeup(&dev->bus->needs_explore); 833 } 834 835 void 836 usb_needs_reattach(usbd_device_handle dev) 837 { 838 DPRINTFN(2,("usb_needs_reattach\n")); 839 if (dev->bus->lock) 840 mutex_enter(dev->bus->lock); 841 dev->powersrc->reattach = 1; 842 dev->bus->needs_explore = 1; 843 if (dev->bus->lock) { 844 cv_signal(&dev->bus->needs_explore_cv); 845 mutex_exit(dev->bus->lock); 846 } else 847 wakeup(&dev->bus->needs_explore); 848 } 849 850 /* Called at splusb() */ 851 int 852 usb_get_next_event(struct usb_event *ue) 853 { 854 struct usb_event_q *ueq; 855 856 if (usb_nevents <= 0) 857 return (0); 858 ueq = SIMPLEQ_FIRST(&usb_events); 859 #ifdef DIAGNOSTIC 860 if (ueq == NULL) { 861 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 862 usb_nevents = 0; 863 return (0); 864 } 865 #endif 866 if (ue) 867 *ue = ueq->ue; 868 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 869 usb_free_event((struct usb_event *)(void *)ueq); 870 usb_nevents--; 871 return (1); 872 } 873 874 void 875 usbd_add_dev_event(int type, usbd_device_handle udev) 876 { 877 struct usb_event *ue = usb_alloc_event(); 878 879 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 880 usb_add_event(type, ue); 881 } 882 883 void 884 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 885 { 886 struct usb_event *ue = usb_alloc_event(); 887 888 ue->u.ue_driver.ue_cookie = udev->cookie; 889 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 890 sizeof ue->u.ue_driver.ue_devname); 891 usb_add_event(type, ue); 892 } 893 894 Static struct usb_event * 895 usb_alloc_event(void) 896 { 897 /* Yes, this is right; we allocate enough so that we can use it later */ 898 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 899 } 900 901 Static void 902 usb_free_event(struct usb_event *uep) 903 { 904 free(uep, M_USBDEV); 905 } 906 907 Static void 908 usb_add_event(int type, struct usb_event *uep) 909 { 910 struct usb_event_q *ueq; 911 struct timeval thetime; 912 int s; 913 914 microtime(&thetime); 915 /* Don't want to wait here inside splusb() */ 916 ueq = (struct usb_event_q *)(void *)uep; 917 ueq->ue = *uep; 918 ueq->ue.ue_type = type; 919 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 920 921 s = splusb(); 922 if (++usb_nevents >= USB_MAX_EVENTS) { 923 /* Too many queued events, drop an old one. */ 924 DPRINTFN(-1,("usb: event dropped\n")); 925 (void)usb_get_next_event(0); 926 } 927 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 928 wakeup(&usb_events); 929 selnotify(&usb_selevent, 0, 0); 930 if (usb_async_proc != NULL) { 931 kpreempt_disable(); 932 softint_schedule(usb_async_sih); 933 kpreempt_enable(); 934 } 935 splx(s); 936 } 937 938 Static void 939 usb_async_intr(void *cookie) 940 { 941 proc_t *proc; 942 943 mutex_enter(proc_lock); 944 if ((proc = usb_async_proc) != NULL) 945 psignal(proc, SIGIO); 946 mutex_exit(proc_lock); 947 } 948 949 Static void 950 usb_soft_intr(void *arg) 951 { 952 usbd_bus_handle bus = arg; 953 954 if (bus->lock) 955 mutex_enter(bus->lock); 956 (*bus->methods->soft_intr)(bus); 957 if (bus->lock) 958 mutex_exit(bus->lock); 959 } 960 961 void 962 usb_schedsoftintr(usbd_bus_handle bus) 963 { 964 965 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 966 967 if (bus->use_polling) { 968 bus->methods->soft_intr(bus); 969 } else { 970 kpreempt_disable(); 971 softint_schedule(bus->soft); 972 kpreempt_enable(); 973 } 974 } 975 976 int 977 usb_activate(device_t self, enum devact act) 978 { 979 struct usb_softc *sc = device_private(self); 980 981 switch (act) { 982 case DVACT_DEACTIVATE: 983 sc->sc_dying = 1; 984 return 0; 985 default: 986 return EOPNOTSUPP; 987 } 988 } 989 990 void 991 usb_childdet(device_t self, device_t child) 992 { 993 int i; 994 struct usb_softc *sc = device_private(self); 995 struct usbd_device *dev; 996 997 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 998 return; 999 1000 for (i = 0; i < dev->subdevlen; i++) 1001 if (dev->subdevs[i] == child) 1002 dev->subdevs[i] = NULL; 1003 } 1004 1005 int 1006 usb_detach(device_t self, int flags) 1007 { 1008 struct usb_softc *sc = device_private(self); 1009 struct usb_event *ue; 1010 int rc; 1011 1012 DPRINTF(("usb_detach: start\n")); 1013 1014 /* Make all devices disconnect. */ 1015 if (sc->sc_port.device != NULL && 1016 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1017 return rc; 1018 1019 pmf_device_deregister(self); 1020 /* Kill off event thread. */ 1021 sc->sc_dying = 1; 1022 while (sc->sc_event_thread != NULL) { 1023 if (sc->sc_bus->lock) { 1024 mutex_enter(sc->sc_bus->lock); 1025 cv_signal(&sc->sc_bus->needs_explore_cv); 1026 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1027 sc->sc_bus->lock, hz * 60); 1028 mutex_exit(sc->sc_bus->lock); 1029 } else { 1030 wakeup(&sc->sc_bus->needs_explore); 1031 tsleep(sc, PWAIT, "usbdet", hz * 60); 1032 } 1033 } 1034 DPRINTF(("usb_detach: event thread dead\n")); 1035 1036 if (sc->sc_bus->soft != NULL) { 1037 softint_disestablish(sc->sc_bus->soft); 1038 sc->sc_bus->soft = NULL; 1039 } 1040 1041 ue = usb_alloc_event(); 1042 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1043 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1044 1045 return (0); 1046 } 1047 1048 #ifdef COMPAT_30 1049 Static void 1050 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1051 const struct usb_device_info *ue) 1052 { 1053 const unsigned char *p; 1054 unsigned char *q; 1055 int i, n; 1056 1057 uo->udi_bus = ue->udi_bus; 1058 uo->udi_addr = ue->udi_addr; 1059 uo->udi_cookie = ue->udi_cookie; 1060 for (i = 0, p = (const unsigned char *)ue->udi_product, 1061 q = (unsigned char *)uo->udi_product; 1062 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1063 if (*p < 0x80) 1064 q[i++] = *p; 1065 else { 1066 q[i++] = '?'; 1067 if ((*p & 0xe0) == 0xe0) 1068 p++; 1069 p++; 1070 } 1071 } 1072 q[i] = 0; 1073 1074 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1075 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1076 if (* p < 0x80) 1077 q[i++] = *p; 1078 else { 1079 q[i++] = '?'; 1080 p++; 1081 if ((*p & 0xe0) == 0xe0) 1082 p++; 1083 } 1084 } 1085 q[i] = 0; 1086 1087 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1088 1089 uo->udi_productNo = ue->udi_productNo; 1090 uo->udi_vendorNo = ue->udi_vendorNo; 1091 uo->udi_releaseNo = ue->udi_releaseNo; 1092 uo->udi_class = ue->udi_class; 1093 uo->udi_subclass = ue->udi_subclass; 1094 uo->udi_protocol = ue->udi_protocol; 1095 uo->udi_config = ue->udi_config; 1096 uo->udi_speed = ue->udi_speed; 1097 uo->udi_power = ue->udi_power; 1098 uo->udi_nports = ue->udi_nports; 1099 1100 for (n=0; n<USB_MAX_DEVNAMES; n++) 1101 memcpy(uo->udi_devnames[n], 1102 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1103 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1104 } 1105 #endif 1106
Indexes created Mon Sep 29 21:09:56 GMT 2025