usb.c revision 1.148
1 /* $NetBSD: usb.c,v 1.148 2013/11/09 07:52:22 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 1.148 2013/11/09 07:52:22 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 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbdi.h> 67 #include <dev/usb/usbdi_util.h> 68 #include <dev/usb/usbdivar.h> 69 #include <dev/usb/usb_verbose.h> 70 #include <dev/usb/usb_quirks.h> 71 72 #define USB_DEV_MINOR 255 73 74 #ifdef USB_DEBUG 75 #define DPRINTF(x) if (usbdebug) printf x 76 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 77 int usbdebug = 0; 78 /* 79 * 0 - do usual exploration 80 * 1 - do not use timeout exploration 81 * >1 - do no exploration 82 */ 83 int usb_noexplore = 0; 84 #else 85 #define DPRINTF(x) 86 #define DPRINTFN(n,x) 87 #define usb_noexplore 0 88 #endif 89 90 struct usb_softc { 91 #if 0 92 device_t sc_dev; /* base device */ 93 #endif 94 usbd_bus_handle sc_bus; /* USB controller */ 95 struct usbd_port sc_port; /* dummy port for root hub */ 96 97 struct lwp *sc_event_thread; 98 99 char sc_dying; 100 }; 101 102 struct usb_taskq { 103 TAILQ_HEAD(, usb_task) tasks; 104 kmutex_t lock; 105 kcondvar_t cv; 106 struct lwp *task_thread_lwp; 107 const char *name; 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 kmutex_t usb_event_lock; 139 Static kcondvar_t usb_event_cv; 140 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 141 Static void *usb_async_sih; 142 Static int usb_dev_open = 0; 143 Static struct usb_event *usb_alloc_event(void); 144 Static void usb_free_event(struct usb_event *); 145 Static void usb_add_event(int, struct usb_event *); 146 Static int usb_get_next_event(struct usb_event *); 147 Static void usb_async_intr(void *); 148 Static void usb_soft_intr(void *); 149 150 #ifdef COMPAT_30 151 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 152 #endif 153 154 Static const char *usbrev_str[] = USBREV_STR; 155 156 static int usb_match(device_t, cfdata_t, void *); 157 static void usb_attach(device_t, device_t, void *); 158 static int usb_detach(device_t, int); 159 static int usb_activate(device_t, enum devact); 160 static void usb_childdet(device_t, device_t); 161 static int usb_once_init(void); 162 static void usb_doattach(device_t); 163 164 extern struct cfdriver usb_cd; 165 166 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 167 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 168 DVF_DETACH_SHUTDOWN); 169 170 static const char *taskq_names[] = USB_TASKQ_NAMES; 171 172 int 173 usb_match(device_t parent, cfdata_t match, void *aux) 174 { 175 DPRINTF(("usbd_match\n")); 176 return (UMATCH_GENERIC); 177 } 178 179 void 180 usb_attach(device_t parent, device_t self, void *aux) 181 { 182 static ONCE_DECL(init_control); 183 struct usb_softc *sc = device_private(self); 184 int usbrev; 185 186 sc->sc_bus = aux; 187 usbrev = sc->sc_bus->usbrev; 188 189 aprint_naive("\n"); 190 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 191 switch (usbrev) { 192 case USBREV_1_0: 193 case USBREV_1_1: 194 case USBREV_2_0: 195 break; 196 default: 197 aprint_error(", not supported\n"); 198 sc->sc_dying = 1; 199 return; 200 } 201 aprint_normal("\n"); 202 203 /* XXX we should have our own level */ 204 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 205 usb_soft_intr, sc->sc_bus); 206 if (sc->sc_bus->soft == NULL) { 207 aprint_error("%s: can't register softintr\n", 208 device_xname(self)); 209 sc->sc_dying = 1; 210 return; 211 } 212 213 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 214 KASSERT(sc->sc_bus->lock != NULL); 215 216 RUN_ONCE(&init_control, usb_once_init); 217 config_interrupts(self, usb_doattach); 218 } 219 220 static int 221 usb_once_init(void) 222 { 223 struct usb_taskq *taskq; 224 int i; 225 226 selinit(&usb_selevent); 227 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 228 cv_init(&usb_event_cv, "usbrea"); 229 230 for (i = 0; i < USB_NUM_TASKQS; i++) { 231 taskq = &usb_taskq[i]; 232 233 TAILQ_INIT(&taskq->tasks); 234 /* 235 * Since USB task methods usb_{add,rem}_task are callable 236 * from any context, we have to make this lock a spinlock. 237 */ 238 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 239 cv_init(&taskq->cv, "usbtsk"); 240 taskq->name = taskq_names[i]; 241 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 242 usb_task_thread, taskq, &taskq->task_thread_lwp, 243 "%s", taskq->name)) { 244 printf("unable to create task thread: %s\n", taskq->name); 245 panic("usb_create_event_thread task"); 246 } 247 /* 248 * XXX we should make sure these threads are alive before 249 * end up using them in usb_doattach(). 250 */ 251 } 252 return 0; 253 } 254 255 static void 256 usb_doattach(device_t self) 257 { 258 struct usb_softc *sc = device_private(self); 259 usbd_device_handle dev; 260 usbd_status err; 261 int speed; 262 struct usb_event *ue; 263 264 DPRINTF(("usbd_doattach\n")); 265 266 sc->sc_bus->usbctl = self; 267 sc->sc_port.power = USB_MAX_POWER; 268 269 switch (sc->sc_bus->usbrev) { 270 case USBREV_1_0: 271 case USBREV_1_1: 272 speed = USB_SPEED_FULL; 273 break; 274 case USBREV_2_0: 275 speed = USB_SPEED_HIGH; 276 break; 277 default: 278 panic("usb_doattach"); 279 } 280 281 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 282 283 ue = usb_alloc_event(); 284 ue->u.ue_ctrlr.ue_bus = device_unit(self); 285 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 286 287 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 288 &sc->sc_port); 289 if (!err) { 290 dev = sc->sc_port.device; 291 if (dev->hub == NULL) { 292 sc->sc_dying = 1; 293 aprint_error("%s: root device is not a hub\n", 294 device_xname(self)); 295 return; 296 } 297 sc->sc_bus->root_hub = dev; 298 usb_create_event_thread(self); 299 #if 1 300 /* 301 * Turning this code off will delay attachment of USB devices 302 * until the USB event thread is running, which means that 303 * the keyboard will not work until after cold boot. 304 */ 305 if (cold && (device_cfdata(self)->cf_flags & 1)) 306 dev->hub->explore(sc->sc_bus->root_hub); 307 #endif 308 } else { 309 aprint_error("%s: root hub problem, error=%s\n", 310 device_xname(self), usbd_errstr(err)); 311 sc->sc_dying = 1; 312 } 313 314 config_pending_incr(self); 315 316 if (!pmf_device_register(self, NULL, NULL)) 317 aprint_error_dev(self, "couldn't establish power handler\n"); 318 319 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 320 usb_async_intr, NULL); 321 322 return; 323 } 324 325 void 326 usb_create_event_thread(device_t self) 327 { 328 struct usb_softc *sc = device_private(self); 329 330 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 331 usb_event_thread, sc, &sc->sc_event_thread, 332 "%s", device_xname(self))) { 333 printf("%s: unable to create event thread for\n", 334 device_xname(self)); 335 panic("usb_create_event_thread"); 336 } 337 } 338 339 /* 340 * Add a task to be performed by the task thread. This function can be 341 * called from any context and the task will be executed in a process 342 * context ASAP. 343 */ 344 void 345 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 346 { 347 struct usb_taskq *taskq; 348 349 taskq = &usb_taskq[queue]; 350 mutex_enter(&taskq->lock); 351 if (task->queue == -1) { 352 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 353 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 354 task->queue = queue; 355 } else { 356 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 357 } 358 cv_signal(&taskq->cv); 359 mutex_exit(&taskq->lock); 360 } 361 362 void 363 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 364 { 365 366 if (task->queue != -1) { 367 struct usb_taskq *taskq = &usb_taskq[task->queue]; 368 mutex_enter(&taskq->lock); 369 TAILQ_REMOVE(&taskq->tasks, task, next); 370 task->queue = -1; 371 mutex_exit(&taskq->lock); 372 } 373 } 374 375 void 376 usb_event_thread(void *arg) 377 { 378 struct usb_softc *sc = arg; 379 380 DPRINTF(("usb_event_thread: start\n")); 381 382 /* 383 * In case this controller is a companion controller to an 384 * EHCI controller we need to wait until the EHCI controller 385 * has grabbed the port. 386 * XXX It would be nicer to do this with a tsleep(), but I don't 387 * know how to synchronize the creation of the threads so it 388 * will work. 389 */ 390 usb_delay_ms(sc->sc_bus, 500); 391 392 /* Make sure first discover does something. */ 393 mutex_enter(sc->sc_bus->lock); 394 sc->sc_bus->needs_explore = 1; 395 usb_discover(sc); 396 mutex_exit(sc->sc_bus->lock); 397 config_pending_decr(sc->sc_bus->usbctl); 398 399 mutex_enter(sc->sc_bus->lock); 400 while (!sc->sc_dying) { 401 if (usb_noexplore < 2) 402 usb_discover(sc); 403 404 cv_timedwait(&sc->sc_bus->needs_explore_cv, 405 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 406 407 DPRINTFN(2,("usb_event_thread: woke up\n")); 408 } 409 sc->sc_event_thread = NULL; 410 411 /* In case parent is waiting for us to exit. */ 412 cv_signal(&sc->sc_bus->needs_explore_cv); 413 mutex_exit(sc->sc_bus->lock); 414 415 DPRINTF(("usb_event_thread: exit\n")); 416 kthread_exit(0); 417 } 418 419 void 420 usb_task_thread(void *arg) 421 { 422 struct usb_task *task; 423 struct usb_taskq *taskq; 424 425 taskq = arg; 426 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 427 428 mutex_enter(&taskq->lock); 429 for (;;) { 430 task = TAILQ_FIRST(&taskq->tasks); 431 if (task == NULL) { 432 cv_wait(&taskq->cv, &taskq->lock); 433 task = TAILQ_FIRST(&taskq->tasks); 434 } 435 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 436 if (task != NULL) { 437 TAILQ_REMOVE(&taskq->tasks, task, next); 438 task->queue = -1; 439 mutex_exit(&taskq->lock); 440 441 if (!(task->flags & USB_TASKQ_MPSAFE)) 442 KERNEL_LOCK(1, curlwp); 443 task->fun(task->arg); 444 if (!(task->flags & USB_TASKQ_MPSAFE)) 445 KERNEL_UNLOCK_ONE(curlwp); 446 447 mutex_enter(&taskq->lock); 448 } 449 } 450 mutex_exit(&taskq->lock); 451 } 452 453 int 454 usbctlprint(void *aux, const char *pnp) 455 { 456 /* only "usb"es can attach to host controllers */ 457 if (pnp) 458 aprint_normal("usb at %s", pnp); 459 460 return (UNCONF); 461 } 462 463 int 464 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 465 { 466 int unit = minor(dev); 467 struct usb_softc *sc; 468 469 if (unit == USB_DEV_MINOR) { 470 if (usb_dev_open) 471 return (EBUSY); 472 usb_dev_open = 1; 473 mutex_enter(proc_lock); 474 usb_async_proc = 0; 475 mutex_exit(proc_lock); 476 return (0); 477 } 478 479 sc = device_lookup_private(&usb_cd, unit); 480 if (!sc) 481 return (ENXIO); 482 483 if (sc->sc_dying) 484 return (EIO); 485 486 return (0); 487 } 488 489 int 490 usbread(dev_t dev, struct uio *uio, int flag) 491 { 492 struct usb_event *ue; 493 #ifdef COMPAT_30 494 struct usb_event_old *ueo = NULL; /* XXXGCC */ 495 int useold = 0; 496 #endif 497 int error, n; 498 499 if (minor(dev) != USB_DEV_MINOR) 500 return (ENXIO); 501 502 switch (uio->uio_resid) { 503 #ifdef COMPAT_30 504 case sizeof(struct usb_event_old): 505 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 506 M_WAITOK|M_ZERO); 507 useold = 1; 508 /* FALLTHRU */ 509 #endif 510 case sizeof(struct usb_event): 511 ue = usb_alloc_event(); 512 break; 513 default: 514 return (EINVAL); 515 } 516 517 error = 0; 518 mutex_enter(&usb_event_lock); 519 for (;;) { 520 n = usb_get_next_event(ue); 521 if (n != 0) 522 break; 523 if (flag & IO_NDELAY) { 524 error = EWOULDBLOCK; 525 break; 526 } 527 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 528 if (error) 529 break; 530 } 531 mutex_exit(&usb_event_lock); 532 if (!error) { 533 #ifdef COMPAT_30 534 if (useold) { /* copy fields to old struct */ 535 ueo->ue_type = ue->ue_type; 536 memcpy(&ueo->ue_time, &ue->ue_time, 537 sizeof(struct timespec)); 538 switch (ue->ue_type) { 539 case USB_EVENT_DEVICE_ATTACH: 540 case USB_EVENT_DEVICE_DETACH: 541 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 542 break; 543 544 case USB_EVENT_CTRLR_ATTACH: 545 case USB_EVENT_CTRLR_DETACH: 546 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 547 break; 548 549 case USB_EVENT_DRIVER_ATTACH: 550 case USB_EVENT_DRIVER_DETACH: 551 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 552 memcpy(ueo->u.ue_driver.ue_devname, 553 ue->u.ue_driver.ue_devname, 554 sizeof(ue->u.ue_driver.ue_devname)); 555 break; 556 default: 557 ; 558 } 559 560 error = uiomove((void *)ueo, sizeof *ueo, uio); 561 } else 562 #endif 563 error = uiomove((void *)ue, sizeof *ue, uio); 564 } 565 usb_free_event(ue); 566 #ifdef COMPAT_30 567 if (useold) 568 free(ueo, M_USBDEV); 569 #endif 570 571 return (error); 572 } 573 574 int 575 usbclose(dev_t dev, int flag, int mode, 576 struct lwp *l) 577 { 578 int unit = minor(dev); 579 580 if (unit == USB_DEV_MINOR) { 581 mutex_enter(proc_lock); 582 usb_async_proc = 0; 583 mutex_exit(proc_lock); 584 usb_dev_open = 0; 585 } 586 587 return (0); 588 } 589 590 int 591 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 592 { 593 struct usb_softc *sc; 594 int unit = minor(devt); 595 596 if (unit == USB_DEV_MINOR) { 597 switch (cmd) { 598 case FIONBIO: 599 /* All handled in the upper FS layer. */ 600 return (0); 601 602 case FIOASYNC: 603 mutex_enter(proc_lock); 604 if (*(int *)data) 605 usb_async_proc = l->l_proc; 606 else 607 usb_async_proc = 0; 608 mutex_exit(proc_lock); 609 return (0); 610 611 default: 612 return (EINVAL); 613 } 614 } 615 616 sc = device_lookup_private(&usb_cd, unit); 617 618 if (sc->sc_dying) 619 return (EIO); 620 621 switch (cmd) { 622 #ifdef USB_DEBUG 623 case USB_SETDEBUG: 624 if (!(flag & FWRITE)) 625 return (EBADF); 626 usbdebug = ((*(int *)data) & 0x000000ff); 627 break; 628 #endif /* USB_DEBUG */ 629 case USB_REQUEST: 630 { 631 struct usb_ctl_request *ur = (void *)data; 632 int len = UGETW(ur->ucr_request.wLength); 633 struct iovec iov; 634 struct uio uio; 635 void *ptr = 0; 636 int addr = ur->ucr_addr; 637 usbd_status err; 638 int error = 0; 639 640 if (!(flag & FWRITE)) 641 return (EBADF); 642 643 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 644 if (len < 0 || len > 32768) 645 return (EINVAL); 646 if (addr < 0 || addr >= USB_MAX_DEVICES || 647 sc->sc_bus->devices[addr] == NULL) 648 return (EINVAL); 649 if (len != 0) { 650 iov.iov_base = (void *)ur->ucr_data; 651 iov.iov_len = len; 652 uio.uio_iov = &iov; 653 uio.uio_iovcnt = 1; 654 uio.uio_resid = len; 655 uio.uio_offset = 0; 656 uio.uio_rw = 657 ur->ucr_request.bmRequestType & UT_READ ? 658 UIO_READ : UIO_WRITE; 659 uio.uio_vmspace = l->l_proc->p_vmspace; 660 ptr = malloc(len, M_TEMP, M_WAITOK); 661 if (uio.uio_rw == UIO_WRITE) { 662 error = uiomove(ptr, len, &uio); 663 if (error) 664 goto ret; 665 } 666 } 667 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 668 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 669 USBD_DEFAULT_TIMEOUT); 670 if (err) { 671 error = EIO; 672 goto ret; 673 } 674 if (len > ur->ucr_actlen) 675 len = ur->ucr_actlen; 676 if (len != 0) { 677 if (uio.uio_rw == UIO_READ) { 678 error = uiomove(ptr, len, &uio); 679 if (error) 680 goto ret; 681 } 682 } 683 ret: 684 if (ptr) 685 free(ptr, M_TEMP); 686 return (error); 687 } 688 689 case USB_DEVICEINFO: 690 { 691 usbd_device_handle dev; 692 struct usb_device_info *di = (void *)data; 693 int addr = di->udi_addr; 694 695 if (addr < 0 || addr >= USB_MAX_DEVICES) 696 return EINVAL; 697 if ((dev = sc->sc_bus->devices[addr]) == NULL) 698 return ENXIO; 699 usbd_fill_deviceinfo(dev, di, 1); 700 break; 701 } 702 703 #ifdef COMPAT_30 704 case USB_DEVICEINFO_OLD: 705 { 706 usbd_device_handle dev; 707 struct usb_device_info_old *di = (void *)data; 708 int addr = di->udi_addr; 709 710 if (addr < 1 || addr >= USB_MAX_DEVICES) 711 return EINVAL; 712 if ((dev = sc->sc_bus->devices[addr]) == NULL) 713 return ENXIO; 714 usbd_fill_deviceinfo_old(dev, di, 1); 715 break; 716 } 717 #endif 718 719 case USB_DEVICESTATS: 720 *(struct usb_device_stats *)data = sc->sc_bus->stats; 721 break; 722 723 default: 724 return (EINVAL); 725 } 726 return (0); 727 } 728 729 int 730 usbpoll(dev_t dev, int events, struct lwp *l) 731 { 732 int revents, mask; 733 734 if (minor(dev) == USB_DEV_MINOR) { 735 revents = 0; 736 mask = POLLIN | POLLRDNORM; 737 738 mutex_enter(&usb_event_lock); 739 if (events & mask && usb_nevents > 0) 740 revents |= events & mask; 741 if (revents == 0 && events & mask) 742 selrecord(l, &usb_selevent); 743 mutex_exit(&usb_event_lock); 744 745 return (revents); 746 } else { 747 return (0); 748 } 749 } 750 751 static void 752 filt_usbrdetach(struct knote *kn) 753 { 754 755 mutex_enter(&usb_event_lock); 756 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 757 mutex_exit(&usb_event_lock); 758 } 759 760 static int 761 filt_usbread(struct knote *kn, long hint) 762 { 763 764 if (usb_nevents == 0) 765 return (0); 766 767 kn->kn_data = sizeof(struct usb_event); 768 return (1); 769 } 770 771 static const struct filterops usbread_filtops = 772 { 1, NULL, filt_usbrdetach, filt_usbread }; 773 774 int 775 usbkqfilter(dev_t dev, struct knote *kn) 776 { 777 struct klist *klist; 778 779 switch (kn->kn_filter) { 780 case EVFILT_READ: 781 if (minor(dev) != USB_DEV_MINOR) 782 return (1); 783 klist = &usb_selevent.sel_klist; 784 kn->kn_fop = &usbread_filtops; 785 break; 786 787 default: 788 return (EINVAL); 789 } 790 791 kn->kn_hook = NULL; 792 793 mutex_enter(&usb_event_lock); 794 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 795 mutex_exit(&usb_event_lock); 796 797 return (0); 798 } 799 800 /* Explore device tree from the root. */ 801 Static void 802 usb_discover(struct usb_softc *sc) 803 { 804 805 KASSERT(mutex_owned(sc->sc_bus->lock)); 806 807 DPRINTFN(2,("usb_discover\n")); 808 if (usb_noexplore > 1) 809 return; 810 /* 811 * We need mutual exclusion while traversing the device tree, 812 * but this is guaranteed since this function is only called 813 * from the event thread for the controller. 814 * 815 * Also, we now have sc_bus->lock held. 816 */ 817 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 818 sc->sc_bus->needs_explore = 0; 819 mutex_exit(sc->sc_bus->lock); 820 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 821 mutex_enter(sc->sc_bus->lock); 822 } 823 } 824 825 void 826 usb_needs_explore(usbd_device_handle dev) 827 { 828 DPRINTFN(2,("usb_needs_explore\n")); 829 mutex_enter(dev->bus->lock); 830 dev->bus->needs_explore = 1; 831 cv_signal(&dev->bus->needs_explore_cv); 832 mutex_exit(dev->bus->lock); 833 } 834 835 void 836 usb_needs_reattach(usbd_device_handle dev) 837 { 838 DPRINTFN(2,("usb_needs_reattach\n")); 839 mutex_enter(dev->bus->lock); 840 dev->powersrc->reattach = 1; 841 dev->bus->needs_explore = 1; 842 cv_signal(&dev->bus->needs_explore_cv); 843 mutex_exit(dev->bus->lock); 844 } 845 846 /* Called at with usb_event_lock held. */ 847 int 848 usb_get_next_event(struct usb_event *ue) 849 { 850 struct usb_event_q *ueq; 851 852 KASSERT(mutex_owned(&usb_event_lock)); 853 854 if (usb_nevents <= 0) 855 return (0); 856 ueq = SIMPLEQ_FIRST(&usb_events); 857 #ifdef DIAGNOSTIC 858 if (ueq == NULL) { 859 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 860 usb_nevents = 0; 861 return (0); 862 } 863 #endif 864 if (ue) 865 *ue = ueq->ue; 866 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 867 usb_free_event((struct usb_event *)(void *)ueq); 868 usb_nevents--; 869 return (1); 870 } 871 872 void 873 usbd_add_dev_event(int type, usbd_device_handle udev) 874 { 875 struct usb_event *ue = usb_alloc_event(); 876 877 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 878 usb_add_event(type, ue); 879 } 880 881 void 882 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 883 { 884 struct usb_event *ue = usb_alloc_event(); 885 886 ue->u.ue_driver.ue_cookie = udev->cookie; 887 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 888 sizeof ue->u.ue_driver.ue_devname); 889 usb_add_event(type, ue); 890 } 891 892 Static struct usb_event * 893 usb_alloc_event(void) 894 { 895 /* Yes, this is right; we allocate enough so that we can use it later */ 896 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 897 } 898 899 Static void 900 usb_free_event(struct usb_event *uep) 901 { 902 free(uep, M_USBDEV); 903 } 904 905 Static void 906 usb_add_event(int type, struct usb_event *uep) 907 { 908 struct usb_event_q *ueq; 909 struct timeval thetime; 910 911 microtime(&thetime); 912 /* Don't want to wait here with usb_event_lock held */ 913 ueq = (struct usb_event_q *)(void *)uep; 914 ueq->ue = *uep; 915 ueq->ue.ue_type = type; 916 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 917 918 mutex_enter(&usb_event_lock); 919 if (++usb_nevents >= USB_MAX_EVENTS) { 920 /* Too many queued events, drop an old one. */ 921 DPRINTFN(-1,("usb: event dropped\n")); 922 (void)usb_get_next_event(0); 923 } 924 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 925 cv_signal(&usb_event_cv); 926 selnotify(&usb_selevent, 0, 0); 927 if (usb_async_proc != NULL) { 928 kpreempt_disable(); 929 softint_schedule(usb_async_sih); 930 kpreempt_enable(); 931 } 932 mutex_exit(&usb_event_lock); 933 } 934 935 Static void 936 usb_async_intr(void *cookie) 937 { 938 proc_t *proc; 939 940 mutex_enter(proc_lock); 941 if ((proc = usb_async_proc) != NULL) 942 psignal(proc, SIGIO); 943 mutex_exit(proc_lock); 944 } 945 946 Static void 947 usb_soft_intr(void *arg) 948 { 949 usbd_bus_handle bus = arg; 950 951 mutex_enter(bus->lock); 952 (*bus->methods->soft_intr)(bus); 953 mutex_exit(bus->lock); 954 } 955 956 void 957 usb_schedsoftintr(usbd_bus_handle bus) 958 { 959 960 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 961 962 if (bus->use_polling) { 963 bus->methods->soft_intr(bus); 964 } else { 965 kpreempt_disable(); 966 softint_schedule(bus->soft); 967 kpreempt_enable(); 968 } 969 } 970 971 int 972 usb_activate(device_t self, enum devact act) 973 { 974 struct usb_softc *sc = device_private(self); 975 976 switch (act) { 977 case DVACT_DEACTIVATE: 978 sc->sc_dying = 1; 979 return 0; 980 default: 981 return EOPNOTSUPP; 982 } 983 } 984 985 void 986 usb_childdet(device_t self, device_t child) 987 { 988 int i; 989 struct usb_softc *sc = device_private(self); 990 struct usbd_device *dev; 991 992 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 993 return; 994 995 for (i = 0; i < dev->subdevlen; i++) 996 if (dev->subdevs[i] == child) 997 dev->subdevs[i] = NULL; 998 } 999 1000 int 1001 usb_detach(device_t self, int flags) 1002 { 1003 struct usb_softc *sc = device_private(self); 1004 struct usb_event *ue; 1005 int rc; 1006 1007 DPRINTF(("usb_detach: start\n")); 1008 1009 /* Make all devices disconnect. */ 1010 if (sc->sc_port.device != NULL && 1011 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1012 return rc; 1013 1014 pmf_device_deregister(self); 1015 /* Kill off event thread. */ 1016 sc->sc_dying = 1; 1017 while (sc->sc_event_thread != NULL) { 1018 mutex_enter(sc->sc_bus->lock); 1019 cv_signal(&sc->sc_bus->needs_explore_cv); 1020 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1021 sc->sc_bus->lock, hz * 60); 1022 mutex_exit(sc->sc_bus->lock); 1023 } 1024 DPRINTF(("usb_detach: event thread dead\n")); 1025 1026 if (sc->sc_bus->soft != NULL) { 1027 softint_disestablish(sc->sc_bus->soft); 1028 sc->sc_bus->soft = NULL; 1029 } 1030 1031 ue = usb_alloc_event(); 1032 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1033 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1034 1035 cv_destroy(&sc->sc_bus->needs_explore_cv); 1036 1037 return (0); 1038 } 1039 1040 #ifdef COMPAT_30 1041 Static void 1042 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1043 const struct usb_device_info *ue) 1044 { 1045 const unsigned char *p; 1046 unsigned char *q; 1047 int i, n; 1048 1049 uo->udi_bus = ue->udi_bus; 1050 uo->udi_addr = ue->udi_addr; 1051 uo->udi_cookie = ue->udi_cookie; 1052 for (i = 0, p = (const unsigned char *)ue->udi_product, 1053 q = (unsigned char *)uo->udi_product; 1054 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1055 if (*p < 0x80) 1056 q[i++] = *p; 1057 else { 1058 q[i++] = '?'; 1059 if ((*p & 0xe0) == 0xe0) 1060 p++; 1061 p++; 1062 } 1063 } 1064 q[i] = 0; 1065 1066 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1067 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1068 if (* p < 0x80) 1069 q[i++] = *p; 1070 else { 1071 q[i++] = '?'; 1072 p++; 1073 if ((*p & 0xe0) == 0xe0) 1074 p++; 1075 } 1076 } 1077 q[i] = 0; 1078 1079 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1080 1081 uo->udi_productNo = ue->udi_productNo; 1082 uo->udi_vendorNo = ue->udi_vendorNo; 1083 uo->udi_releaseNo = ue->udi_releaseNo; 1084 uo->udi_class = ue->udi_class; 1085 uo->udi_subclass = ue->udi_subclass; 1086 uo->udi_protocol = ue->udi_protocol; 1087 uo->udi_config = ue->udi_config; 1088 uo->udi_speed = ue->udi_speed; 1089 uo->udi_power = ue->udi_power; 1090 uo->udi_nports = ue->udi_nports; 1091 1092 for (n=0; n<USB_MAX_DEVNAMES; n++) 1093 memcpy(uo->udi_devnames[n], 1094 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1095 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1096 } 1097 #endif 1098
Indexes created Wed Sep 24 05:09:52 GMT 2025