usb.c revision 1.149
1 /* $NetBSD: usb.c,v 1.149 2014/03/16 05:20:29 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 1.149 2014/03/16 05:20:29 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 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 .d_open = usbopen, 121 .d_close = usbclose, 122 .d_read = usbread, 123 .d_write = nowrite, 124 .d_ioctl = usbioctl, 125 .d_stop = nostop, 126 .d_tty = notty, 127 .d_poll = usbpoll, 128 .d_mmap = nommap, 129 .d_kqfilter = usbkqfilter, 130 .d_flag = D_OTHER 131 }; 132 133 Static void usb_discover(struct usb_softc *); 134 Static void usb_create_event_thread(device_t); 135 Static void usb_event_thread(void *); 136 Static void usb_task_thread(void *); 137 138 #define USB_MAX_EVENTS 100 139 struct usb_event_q { 140 struct usb_event ue; 141 SIMPLEQ_ENTRY(usb_event_q) next; 142 }; 143 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 144 SIMPLEQ_HEAD_INITIALIZER(usb_events); 145 Static int usb_nevents = 0; 146 Static struct selinfo usb_selevent; 147 Static kmutex_t usb_event_lock; 148 Static kcondvar_t usb_event_cv; 149 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 150 Static void *usb_async_sih; 151 Static int usb_dev_open = 0; 152 Static struct usb_event *usb_alloc_event(void); 153 Static void usb_free_event(struct usb_event *); 154 Static void usb_add_event(int, struct usb_event *); 155 Static int usb_get_next_event(struct usb_event *); 156 Static void usb_async_intr(void *); 157 Static void usb_soft_intr(void *); 158 159 #ifdef COMPAT_30 160 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 161 #endif 162 163 Static const char *usbrev_str[] = USBREV_STR; 164 165 static int usb_match(device_t, cfdata_t, void *); 166 static void usb_attach(device_t, device_t, void *); 167 static int usb_detach(device_t, int); 168 static int usb_activate(device_t, enum devact); 169 static void usb_childdet(device_t, device_t); 170 static int usb_once_init(void); 171 static void usb_doattach(device_t); 172 173 extern struct cfdriver usb_cd; 174 175 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 176 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 177 DVF_DETACH_SHUTDOWN); 178 179 static const char *taskq_names[] = USB_TASKQ_NAMES; 180 181 int 182 usb_match(device_t parent, cfdata_t match, void *aux) 183 { 184 DPRINTF(("usbd_match\n")); 185 return (UMATCH_GENERIC); 186 } 187 188 void 189 usb_attach(device_t parent, device_t self, void *aux) 190 { 191 static ONCE_DECL(init_control); 192 struct usb_softc *sc = device_private(self); 193 int usbrev; 194 195 sc->sc_bus = aux; 196 usbrev = sc->sc_bus->usbrev; 197 198 aprint_naive("\n"); 199 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 200 switch (usbrev) { 201 case USBREV_1_0: 202 case USBREV_1_1: 203 case USBREV_2_0: 204 break; 205 default: 206 aprint_error(", not supported\n"); 207 sc->sc_dying = 1; 208 return; 209 } 210 aprint_normal("\n"); 211 212 /* XXX we should have our own level */ 213 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 214 usb_soft_intr, sc->sc_bus); 215 if (sc->sc_bus->soft == NULL) { 216 aprint_error("%s: can't register softintr\n", 217 device_xname(self)); 218 sc->sc_dying = 1; 219 return; 220 } 221 222 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 223 KASSERT(sc->sc_bus->lock != NULL); 224 225 RUN_ONCE(&init_control, usb_once_init); 226 config_interrupts(self, usb_doattach); 227 } 228 229 static int 230 usb_once_init(void) 231 { 232 struct usb_taskq *taskq; 233 int i; 234 235 selinit(&usb_selevent); 236 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 237 cv_init(&usb_event_cv, "usbrea"); 238 239 for (i = 0; i < USB_NUM_TASKQS; i++) { 240 taskq = &usb_taskq[i]; 241 242 TAILQ_INIT(&taskq->tasks); 243 /* 244 * Since USB task methods usb_{add,rem}_task are callable 245 * from any context, we have to make this lock a spinlock. 246 */ 247 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 248 cv_init(&taskq->cv, "usbtsk"); 249 taskq->name = taskq_names[i]; 250 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 251 usb_task_thread, taskq, &taskq->task_thread_lwp, 252 "%s", taskq->name)) { 253 printf("unable to create task thread: %s\n", taskq->name); 254 panic("usb_create_event_thread task"); 255 } 256 /* 257 * XXX we should make sure these threads are alive before 258 * end up using them in usb_doattach(). 259 */ 260 } 261 return 0; 262 } 263 264 static void 265 usb_doattach(device_t self) 266 { 267 struct usb_softc *sc = device_private(self); 268 usbd_device_handle dev; 269 usbd_status err; 270 int speed; 271 struct usb_event *ue; 272 273 DPRINTF(("usbd_doattach\n")); 274 275 sc->sc_bus->usbctl = self; 276 sc->sc_port.power = USB_MAX_POWER; 277 278 switch (sc->sc_bus->usbrev) { 279 case USBREV_1_0: 280 case USBREV_1_1: 281 speed = USB_SPEED_FULL; 282 break; 283 case USBREV_2_0: 284 speed = USB_SPEED_HIGH; 285 break; 286 default: 287 panic("usb_doattach"); 288 } 289 290 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 291 292 ue = usb_alloc_event(); 293 ue->u.ue_ctrlr.ue_bus = device_unit(self); 294 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 295 296 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 297 &sc->sc_port); 298 if (!err) { 299 dev = sc->sc_port.device; 300 if (dev->hub == NULL) { 301 sc->sc_dying = 1; 302 aprint_error("%s: root device is not a hub\n", 303 device_xname(self)); 304 return; 305 } 306 sc->sc_bus->root_hub = dev; 307 usb_create_event_thread(self); 308 #if 1 309 /* 310 * Turning this code off will delay attachment of USB devices 311 * until the USB event thread is running, which means that 312 * the keyboard will not work until after cold boot. 313 */ 314 if (cold && (device_cfdata(self)->cf_flags & 1)) 315 dev->hub->explore(sc->sc_bus->root_hub); 316 #endif 317 } else { 318 aprint_error("%s: root hub problem, error=%s\n", 319 device_xname(self), usbd_errstr(err)); 320 sc->sc_dying = 1; 321 } 322 323 config_pending_incr(self); 324 325 if (!pmf_device_register(self, NULL, NULL)) 326 aprint_error_dev(self, "couldn't establish power handler\n"); 327 328 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 329 usb_async_intr, NULL); 330 331 return; 332 } 333 334 void 335 usb_create_event_thread(device_t self) 336 { 337 struct usb_softc *sc = device_private(self); 338 339 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 340 usb_event_thread, sc, &sc->sc_event_thread, 341 "%s", device_xname(self))) { 342 printf("%s: unable to create event thread for\n", 343 device_xname(self)); 344 panic("usb_create_event_thread"); 345 } 346 } 347 348 /* 349 * Add a task to be performed by the task thread. This function can be 350 * called from any context and the task will be executed in a process 351 * context ASAP. 352 */ 353 void 354 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 355 { 356 struct usb_taskq *taskq; 357 358 taskq = &usb_taskq[queue]; 359 mutex_enter(&taskq->lock); 360 if (task->queue == -1) { 361 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 362 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 363 task->queue = queue; 364 } else { 365 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 366 } 367 cv_signal(&taskq->cv); 368 mutex_exit(&taskq->lock); 369 } 370 371 void 372 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 373 { 374 375 if (task->queue != -1) { 376 struct usb_taskq *taskq = &usb_taskq[task->queue]; 377 mutex_enter(&taskq->lock); 378 TAILQ_REMOVE(&taskq->tasks, task, next); 379 task->queue = -1; 380 mutex_exit(&taskq->lock); 381 } 382 } 383 384 void 385 usb_event_thread(void *arg) 386 { 387 struct usb_softc *sc = arg; 388 389 DPRINTF(("usb_event_thread: start\n")); 390 391 /* 392 * In case this controller is a companion controller to an 393 * EHCI controller we need to wait until the EHCI controller 394 * has grabbed the port. 395 * XXX It would be nicer to do this with a tsleep(), but I don't 396 * know how to synchronize the creation of the threads so it 397 * will work. 398 */ 399 usb_delay_ms(sc->sc_bus, 500); 400 401 /* Make sure first discover does something. */ 402 mutex_enter(sc->sc_bus->lock); 403 sc->sc_bus->needs_explore = 1; 404 usb_discover(sc); 405 mutex_exit(sc->sc_bus->lock); 406 config_pending_decr(sc->sc_bus->usbctl); 407 408 mutex_enter(sc->sc_bus->lock); 409 while (!sc->sc_dying) { 410 if (usb_noexplore < 2) 411 usb_discover(sc); 412 413 cv_timedwait(&sc->sc_bus->needs_explore_cv, 414 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 415 416 DPRINTFN(2,("usb_event_thread: woke up\n")); 417 } 418 sc->sc_event_thread = NULL; 419 420 /* In case parent is waiting for us to exit. */ 421 cv_signal(&sc->sc_bus->needs_explore_cv); 422 mutex_exit(sc->sc_bus->lock); 423 424 DPRINTF(("usb_event_thread: exit\n")); 425 kthread_exit(0); 426 } 427 428 void 429 usb_task_thread(void *arg) 430 { 431 struct usb_task *task; 432 struct usb_taskq *taskq; 433 434 taskq = arg; 435 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 436 437 mutex_enter(&taskq->lock); 438 for (;;) { 439 task = TAILQ_FIRST(&taskq->tasks); 440 if (task == NULL) { 441 cv_wait(&taskq->cv, &taskq->lock); 442 task = TAILQ_FIRST(&taskq->tasks); 443 } 444 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 445 if (task != NULL) { 446 TAILQ_REMOVE(&taskq->tasks, task, next); 447 task->queue = -1; 448 mutex_exit(&taskq->lock); 449 450 if (!(task->flags & USB_TASKQ_MPSAFE)) 451 KERNEL_LOCK(1, curlwp); 452 task->fun(task->arg); 453 if (!(task->flags & USB_TASKQ_MPSAFE)) 454 KERNEL_UNLOCK_ONE(curlwp); 455 456 mutex_enter(&taskq->lock); 457 } 458 } 459 mutex_exit(&taskq->lock); 460 } 461 462 int 463 usbctlprint(void *aux, const char *pnp) 464 { 465 /* only "usb"es can attach to host controllers */ 466 if (pnp) 467 aprint_normal("usb at %s", pnp); 468 469 return (UNCONF); 470 } 471 472 int 473 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 474 { 475 int unit = minor(dev); 476 struct usb_softc *sc; 477 478 if (unit == USB_DEV_MINOR) { 479 if (usb_dev_open) 480 return (EBUSY); 481 usb_dev_open = 1; 482 mutex_enter(proc_lock); 483 usb_async_proc = 0; 484 mutex_exit(proc_lock); 485 return (0); 486 } 487 488 sc = device_lookup_private(&usb_cd, unit); 489 if (!sc) 490 return (ENXIO); 491 492 if (sc->sc_dying) 493 return (EIO); 494 495 return (0); 496 } 497 498 int 499 usbread(dev_t dev, struct uio *uio, int flag) 500 { 501 struct usb_event *ue; 502 #ifdef COMPAT_30 503 struct usb_event_old *ueo = NULL; /* XXXGCC */ 504 int useold = 0; 505 #endif 506 int error, n; 507 508 if (minor(dev) != USB_DEV_MINOR) 509 return (ENXIO); 510 511 switch (uio->uio_resid) { 512 #ifdef COMPAT_30 513 case sizeof(struct usb_event_old): 514 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 515 M_WAITOK|M_ZERO); 516 useold = 1; 517 /* FALLTHRU */ 518 #endif 519 case sizeof(struct usb_event): 520 ue = usb_alloc_event(); 521 break; 522 default: 523 return (EINVAL); 524 } 525 526 error = 0; 527 mutex_enter(&usb_event_lock); 528 for (;;) { 529 n = usb_get_next_event(ue); 530 if (n != 0) 531 break; 532 if (flag & IO_NDELAY) { 533 error = EWOULDBLOCK; 534 break; 535 } 536 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 537 if (error) 538 break; 539 } 540 mutex_exit(&usb_event_lock); 541 if (!error) { 542 #ifdef COMPAT_30 543 if (useold) { /* copy fields to old struct */ 544 ueo->ue_type = ue->ue_type; 545 memcpy(&ueo->ue_time, &ue->ue_time, 546 sizeof(struct timespec)); 547 switch (ue->ue_type) { 548 case USB_EVENT_DEVICE_ATTACH: 549 case USB_EVENT_DEVICE_DETACH: 550 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 551 break; 552 553 case USB_EVENT_CTRLR_ATTACH: 554 case USB_EVENT_CTRLR_DETACH: 555 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 556 break; 557 558 case USB_EVENT_DRIVER_ATTACH: 559 case USB_EVENT_DRIVER_DETACH: 560 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 561 memcpy(ueo->u.ue_driver.ue_devname, 562 ue->u.ue_driver.ue_devname, 563 sizeof(ue->u.ue_driver.ue_devname)); 564 break; 565 default: 566 ; 567 } 568 569 error = uiomove((void *)ueo, sizeof *ueo, uio); 570 } else 571 #endif 572 error = uiomove((void *)ue, sizeof *ue, uio); 573 } 574 usb_free_event(ue); 575 #ifdef COMPAT_30 576 if (useold) 577 free(ueo, M_USBDEV); 578 #endif 579 580 return (error); 581 } 582 583 int 584 usbclose(dev_t dev, int flag, int mode, 585 struct lwp *l) 586 { 587 int unit = minor(dev); 588 589 if (unit == USB_DEV_MINOR) { 590 mutex_enter(proc_lock); 591 usb_async_proc = 0; 592 mutex_exit(proc_lock); 593 usb_dev_open = 0; 594 } 595 596 return (0); 597 } 598 599 int 600 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 601 { 602 struct usb_softc *sc; 603 int unit = minor(devt); 604 605 if (unit == USB_DEV_MINOR) { 606 switch (cmd) { 607 case FIONBIO: 608 /* All handled in the upper FS layer. */ 609 return (0); 610 611 case FIOASYNC: 612 mutex_enter(proc_lock); 613 if (*(int *)data) 614 usb_async_proc = l->l_proc; 615 else 616 usb_async_proc = 0; 617 mutex_exit(proc_lock); 618 return (0); 619 620 default: 621 return (EINVAL); 622 } 623 } 624 625 sc = device_lookup_private(&usb_cd, unit); 626 627 if (sc->sc_dying) 628 return (EIO); 629 630 switch (cmd) { 631 #ifdef USB_DEBUG 632 case USB_SETDEBUG: 633 if (!(flag & FWRITE)) 634 return (EBADF); 635 usbdebug = ((*(int *)data) & 0x000000ff); 636 break; 637 #endif /* USB_DEBUG */ 638 case USB_REQUEST: 639 { 640 struct usb_ctl_request *ur = (void *)data; 641 int len = UGETW(ur->ucr_request.wLength); 642 struct iovec iov; 643 struct uio uio; 644 void *ptr = 0; 645 int addr = ur->ucr_addr; 646 usbd_status err; 647 int error = 0; 648 649 if (!(flag & FWRITE)) 650 return (EBADF); 651 652 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 653 if (len < 0 || len > 32768) 654 return (EINVAL); 655 if (addr < 0 || addr >= USB_MAX_DEVICES || 656 sc->sc_bus->devices[addr] == NULL) 657 return (EINVAL); 658 if (len != 0) { 659 iov.iov_base = (void *)ur->ucr_data; 660 iov.iov_len = len; 661 uio.uio_iov = &iov; 662 uio.uio_iovcnt = 1; 663 uio.uio_resid = len; 664 uio.uio_offset = 0; 665 uio.uio_rw = 666 ur->ucr_request.bmRequestType & UT_READ ? 667 UIO_READ : UIO_WRITE; 668 uio.uio_vmspace = l->l_proc->p_vmspace; 669 ptr = malloc(len, M_TEMP, M_WAITOK); 670 if (uio.uio_rw == UIO_WRITE) { 671 error = uiomove(ptr, len, &uio); 672 if (error) 673 goto ret; 674 } 675 } 676 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 677 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 678 USBD_DEFAULT_TIMEOUT); 679 if (err) { 680 error = EIO; 681 goto ret; 682 } 683 if (len > ur->ucr_actlen) 684 len = ur->ucr_actlen; 685 if (len != 0) { 686 if (uio.uio_rw == UIO_READ) { 687 error = uiomove(ptr, len, &uio); 688 if (error) 689 goto ret; 690 } 691 } 692 ret: 693 if (ptr) 694 free(ptr, M_TEMP); 695 return (error); 696 } 697 698 case USB_DEVICEINFO: 699 { 700 usbd_device_handle dev; 701 struct usb_device_info *di = (void *)data; 702 int addr = di->udi_addr; 703 704 if (addr < 0 || addr >= USB_MAX_DEVICES) 705 return EINVAL; 706 if ((dev = sc->sc_bus->devices[addr]) == NULL) 707 return ENXIO; 708 usbd_fill_deviceinfo(dev, di, 1); 709 break; 710 } 711 712 #ifdef COMPAT_30 713 case USB_DEVICEINFO_OLD: 714 { 715 usbd_device_handle dev; 716 struct usb_device_info_old *di = (void *)data; 717 int addr = di->udi_addr; 718 719 if (addr < 1 || addr >= USB_MAX_DEVICES) 720 return EINVAL; 721 if ((dev = sc->sc_bus->devices[addr]) == NULL) 722 return ENXIO; 723 usbd_fill_deviceinfo_old(dev, di, 1); 724 break; 725 } 726 #endif 727 728 case USB_DEVICESTATS: 729 *(struct usb_device_stats *)data = sc->sc_bus->stats; 730 break; 731 732 default: 733 return (EINVAL); 734 } 735 return (0); 736 } 737 738 int 739 usbpoll(dev_t dev, int events, struct lwp *l) 740 { 741 int revents, mask; 742 743 if (minor(dev) == USB_DEV_MINOR) { 744 revents = 0; 745 mask = POLLIN | POLLRDNORM; 746 747 mutex_enter(&usb_event_lock); 748 if (events & mask && usb_nevents > 0) 749 revents |= events & mask; 750 if (revents == 0 && events & mask) 751 selrecord(l, &usb_selevent); 752 mutex_exit(&usb_event_lock); 753 754 return (revents); 755 } else { 756 return (0); 757 } 758 } 759 760 static void 761 filt_usbrdetach(struct knote *kn) 762 { 763 764 mutex_enter(&usb_event_lock); 765 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 766 mutex_exit(&usb_event_lock); 767 } 768 769 static int 770 filt_usbread(struct knote *kn, long hint) 771 { 772 773 if (usb_nevents == 0) 774 return (0); 775 776 kn->kn_data = sizeof(struct usb_event); 777 return (1); 778 } 779 780 static const struct filterops usbread_filtops = 781 { 1, NULL, filt_usbrdetach, filt_usbread }; 782 783 int 784 usbkqfilter(dev_t dev, struct knote *kn) 785 { 786 struct klist *klist; 787 788 switch (kn->kn_filter) { 789 case EVFILT_READ: 790 if (minor(dev) != USB_DEV_MINOR) 791 return (1); 792 klist = &usb_selevent.sel_klist; 793 kn->kn_fop = &usbread_filtops; 794 break; 795 796 default: 797 return (EINVAL); 798 } 799 800 kn->kn_hook = NULL; 801 802 mutex_enter(&usb_event_lock); 803 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 804 mutex_exit(&usb_event_lock); 805 806 return (0); 807 } 808 809 /* Explore device tree from the root. */ 810 Static void 811 usb_discover(struct usb_softc *sc) 812 { 813 814 KASSERT(mutex_owned(sc->sc_bus->lock)); 815 816 DPRINTFN(2,("usb_discover\n")); 817 if (usb_noexplore > 1) 818 return; 819 /* 820 * We need mutual exclusion while traversing the device tree, 821 * but this is guaranteed since this function is only called 822 * from the event thread for the controller. 823 * 824 * Also, we now have sc_bus->lock held. 825 */ 826 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 827 sc->sc_bus->needs_explore = 0; 828 mutex_exit(sc->sc_bus->lock); 829 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 830 mutex_enter(sc->sc_bus->lock); 831 } 832 } 833 834 void 835 usb_needs_explore(usbd_device_handle dev) 836 { 837 DPRINTFN(2,("usb_needs_explore\n")); 838 mutex_enter(dev->bus->lock); 839 dev->bus->needs_explore = 1; 840 cv_signal(&dev->bus->needs_explore_cv); 841 mutex_exit(dev->bus->lock); 842 } 843 844 void 845 usb_needs_reattach(usbd_device_handle dev) 846 { 847 DPRINTFN(2,("usb_needs_reattach\n")); 848 mutex_enter(dev->bus->lock); 849 dev->powersrc->reattach = 1; 850 dev->bus->needs_explore = 1; 851 cv_signal(&dev->bus->needs_explore_cv); 852 mutex_exit(dev->bus->lock); 853 } 854 855 /* Called at with usb_event_lock held. */ 856 int 857 usb_get_next_event(struct usb_event *ue) 858 { 859 struct usb_event_q *ueq; 860 861 KASSERT(mutex_owned(&usb_event_lock)); 862 863 if (usb_nevents <= 0) 864 return (0); 865 ueq = SIMPLEQ_FIRST(&usb_events); 866 #ifdef DIAGNOSTIC 867 if (ueq == NULL) { 868 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 869 usb_nevents = 0; 870 return (0); 871 } 872 #endif 873 if (ue) 874 *ue = ueq->ue; 875 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 876 usb_free_event((struct usb_event *)(void *)ueq); 877 usb_nevents--; 878 return (1); 879 } 880 881 void 882 usbd_add_dev_event(int type, usbd_device_handle udev) 883 { 884 struct usb_event *ue = usb_alloc_event(); 885 886 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 887 usb_add_event(type, ue); 888 } 889 890 void 891 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 892 { 893 struct usb_event *ue = usb_alloc_event(); 894 895 ue->u.ue_driver.ue_cookie = udev->cookie; 896 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 897 sizeof ue->u.ue_driver.ue_devname); 898 usb_add_event(type, ue); 899 } 900 901 Static struct usb_event * 902 usb_alloc_event(void) 903 { 904 /* Yes, this is right; we allocate enough so that we can use it later */ 905 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 906 } 907 908 Static void 909 usb_free_event(struct usb_event *uep) 910 { 911 free(uep, M_USBDEV); 912 } 913 914 Static void 915 usb_add_event(int type, struct usb_event *uep) 916 { 917 struct usb_event_q *ueq; 918 struct timeval thetime; 919 920 microtime(&thetime); 921 /* Don't want to wait here with usb_event_lock held */ 922 ueq = (struct usb_event_q *)(void *)uep; 923 ueq->ue = *uep; 924 ueq->ue.ue_type = type; 925 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 926 927 mutex_enter(&usb_event_lock); 928 if (++usb_nevents >= USB_MAX_EVENTS) { 929 /* Too many queued events, drop an old one. */ 930 DPRINTFN(-1,("usb: event dropped\n")); 931 (void)usb_get_next_event(0); 932 } 933 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 934 cv_signal(&usb_event_cv); 935 selnotify(&usb_selevent, 0, 0); 936 if (usb_async_proc != NULL) { 937 kpreempt_disable(); 938 softint_schedule(usb_async_sih); 939 kpreempt_enable(); 940 } 941 mutex_exit(&usb_event_lock); 942 } 943 944 Static void 945 usb_async_intr(void *cookie) 946 { 947 proc_t *proc; 948 949 mutex_enter(proc_lock); 950 if ((proc = usb_async_proc) != NULL) 951 psignal(proc, SIGIO); 952 mutex_exit(proc_lock); 953 } 954 955 Static void 956 usb_soft_intr(void *arg) 957 { 958 usbd_bus_handle bus = arg; 959 960 mutex_enter(bus->lock); 961 (*bus->methods->soft_intr)(bus); 962 mutex_exit(bus->lock); 963 } 964 965 void 966 usb_schedsoftintr(usbd_bus_handle bus) 967 { 968 969 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 970 971 if (bus->use_polling) { 972 bus->methods->soft_intr(bus); 973 } else { 974 kpreempt_disable(); 975 softint_schedule(bus->soft); 976 kpreempt_enable(); 977 } 978 } 979 980 int 981 usb_activate(device_t self, enum devact act) 982 { 983 struct usb_softc *sc = device_private(self); 984 985 switch (act) { 986 case DVACT_DEACTIVATE: 987 sc->sc_dying = 1; 988 return 0; 989 default: 990 return EOPNOTSUPP; 991 } 992 } 993 994 void 995 usb_childdet(device_t self, device_t child) 996 { 997 int i; 998 struct usb_softc *sc = device_private(self); 999 struct usbd_device *dev; 1000 1001 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1002 return; 1003 1004 for (i = 0; i < dev->subdevlen; i++) 1005 if (dev->subdevs[i] == child) 1006 dev->subdevs[i] = NULL; 1007 } 1008 1009 int 1010 usb_detach(device_t self, int flags) 1011 { 1012 struct usb_softc *sc = device_private(self); 1013 struct usb_event *ue; 1014 int rc; 1015 1016 DPRINTF(("usb_detach: start\n")); 1017 1018 /* Make all devices disconnect. */ 1019 if (sc->sc_port.device != NULL && 1020 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1021 return rc; 1022 1023 pmf_device_deregister(self); 1024 /* Kill off event thread. */ 1025 sc->sc_dying = 1; 1026 while (sc->sc_event_thread != NULL) { 1027 mutex_enter(sc->sc_bus->lock); 1028 cv_signal(&sc->sc_bus->needs_explore_cv); 1029 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1030 sc->sc_bus->lock, hz * 60); 1031 mutex_exit(sc->sc_bus->lock); 1032 } 1033 DPRINTF(("usb_detach: event thread dead\n")); 1034 1035 if (sc->sc_bus->soft != NULL) { 1036 softint_disestablish(sc->sc_bus->soft); 1037 sc->sc_bus->soft = NULL; 1038 } 1039 1040 ue = usb_alloc_event(); 1041 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1042 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1043 1044 cv_destroy(&sc->sc_bus->needs_explore_cv); 1045 1046 return (0); 1047 } 1048 1049 #ifdef COMPAT_30 1050 Static void 1051 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1052 const struct usb_device_info *ue) 1053 { 1054 const unsigned char *p; 1055 unsigned char *q; 1056 int i, n; 1057 1058 uo->udi_bus = ue->udi_bus; 1059 uo->udi_addr = ue->udi_addr; 1060 uo->udi_cookie = ue->udi_cookie; 1061 for (i = 0, p = (const unsigned char *)ue->udi_product, 1062 q = (unsigned char *)uo->udi_product; 1063 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1064 if (*p < 0x80) 1065 q[i++] = *p; 1066 else { 1067 q[i++] = '?'; 1068 if ((*p & 0xe0) == 0xe0) 1069 p++; 1070 p++; 1071 } 1072 } 1073 q[i] = 0; 1074 1075 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1076 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1077 if (* p < 0x80) 1078 q[i++] = *p; 1079 else { 1080 q[i++] = '?'; 1081 p++; 1082 if ((*p & 0xe0) == 0xe0) 1083 p++; 1084 } 1085 } 1086 q[i] = 0; 1087 1088 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1089 1090 uo->udi_productNo = ue->udi_productNo; 1091 uo->udi_vendorNo = ue->udi_vendorNo; 1092 uo->udi_releaseNo = ue->udi_releaseNo; 1093 uo->udi_class = ue->udi_class; 1094 uo->udi_subclass = ue->udi_subclass; 1095 uo->udi_protocol = ue->udi_protocol; 1096 uo->udi_config = ue->udi_config; 1097 uo->udi_speed = ue->udi_speed; 1098 uo->udi_power = ue->udi_power; 1099 uo->udi_nports = ue->udi_nports; 1100 1101 for (n=0; n<USB_MAX_DEVNAMES; n++) 1102 memcpy(uo->udi_devnames[n], 1103 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1104 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1105 } 1106 #endif 1107
Indexes created Wed Sep 24 05:09:52 GMT 2025