usb.c revision 1.139
1 /* $NetBSD: usb.c,v 1.139 2013/01/08 06:47:45 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 1.139 2013/01/08 06:47:45 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 bool mpsafe; 185 int usbrev; 186 187 sc->sc_bus = aux; 188 mpsafe = sc->sc_bus->methods->get_lock ? true : false; 189 usbrev = sc->sc_bus->usbrev; 190 191 aprint_naive("\n"); 192 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 193 switch (usbrev) { 194 case USBREV_1_0: 195 case USBREV_1_1: 196 case USBREV_2_0: 197 break; 198 default: 199 aprint_error(", not supported\n"); 200 sc->sc_dying = 1; 201 return; 202 } 203 aprint_normal("\n"); 204 205 if (mpsafe) 206 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 207 else 208 sc->sc_bus->lock = NULL; 209 210 RUN_ONCE(&init_control, usb_once_init); 211 config_interrupts(self, usb_doattach); 212 } 213 214 static int 215 usb_once_init(void) 216 { 217 struct usb_taskq *taskq; 218 int i; 219 220 selinit(&usb_selevent); 221 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 222 cv_init(&usb_event_cv, "usbrea"); 223 224 for (i = 0; i < USB_NUM_TASKQS; i++) { 225 taskq = &usb_taskq[i]; 226 227 TAILQ_INIT(&taskq->tasks); 228 /* 229 * Since USB task methods usb_{add,rem}_task are callable 230 * from any context, we have to make this lock a spinlock. 231 */ 232 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 233 cv_init(&taskq->cv, "usbtsk"); 234 taskq->name = taskq_names[i]; 235 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 236 usb_task_thread, taskq, &taskq->task_thread_lwp, 237 "%s", taskq->name)) { 238 printf("unable to create task thread: %s\n", taskq->name); 239 panic("usb_create_event_thread task"); 240 } 241 /* 242 * XXX we should make sure these threads are alive before 243 * end up using them in usb_doattach(). 244 */ 245 } 246 return 0; 247 } 248 249 static void 250 usb_doattach(device_t self) 251 { 252 struct usb_softc *sc = device_private(self); 253 usbd_device_handle dev; 254 usbd_status err; 255 int speed; 256 struct usb_event *ue; 257 const bool mpsafe = sc->sc_bus->methods->get_lock ? true : false; 258 259 DPRINTF(("usbd_doattach\n")); 260 261 sc->sc_bus->usbctl = self; 262 sc->sc_port.power = USB_MAX_POWER; 263 264 switch (sc->sc_bus->usbrev) { 265 case USBREV_1_0: 266 case USBREV_1_1: 267 speed = USB_SPEED_FULL; 268 break; 269 case USBREV_2_0: 270 speed = USB_SPEED_HIGH; 271 break; 272 default: 273 panic("usb_doattach"); 274 } 275 276 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 277 278 ue = usb_alloc_event(); 279 ue->u.ue_ctrlr.ue_bus = device_unit(self); 280 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 281 282 /* XXX we should have our own level */ 283 sc->sc_bus->soft = softint_establish( 284 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 285 usb_soft_intr, sc->sc_bus); 286 if (sc->sc_bus->soft == NULL) { 287 aprint_error("%s: can't register softintr\n", 288 device_xname(self)); 289 sc->sc_dying = 1; 290 return; 291 } 292 293 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 294 &sc->sc_port); 295 if (!err) { 296 dev = sc->sc_port.device; 297 if (dev->hub == NULL) { 298 sc->sc_dying = 1; 299 aprint_error("%s: root device is not a hub\n", 300 device_xname(self)); 301 return; 302 } 303 sc->sc_bus->root_hub = dev; 304 usb_create_event_thread(self); 305 #if 1 306 /* 307 * Turning this code off will delay attachment of USB devices 308 * until the USB event thread is running, which means that 309 * the keyboard will not work until after cold boot. 310 */ 311 if (cold && (device_cfdata(self)->cf_flags & 1)) 312 dev->hub->explore(sc->sc_bus->root_hub); 313 #endif 314 } else { 315 aprint_error("%s: root hub problem, error=%d\n", 316 device_xname(self), err); 317 sc->sc_dying = 1; 318 } 319 320 config_pending_incr(); 321 322 if (!pmf_device_register(self, NULL, NULL)) 323 aprint_error_dev(self, "couldn't establish power handler\n"); 324 325 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 326 usb_async_intr, NULL); 327 328 return; 329 } 330 331 void 332 usb_create_event_thread(device_t self) 333 { 334 struct usb_softc *sc = device_private(self); 335 336 if (kthread_create(PRI_NONE, 337 sc->sc_bus->lock ? KTHREAD_MPSAFE : 0, NULL, 338 usb_event_thread, sc, &sc->sc_event_thread, 339 "%s", device_xname(self))) { 340 printf("%s: unable to create event thread for\n", 341 device_xname(self)); 342 panic("usb_create_event_thread"); 343 } 344 } 345 346 /* 347 * Add a task to be performed by the task thread. This function can be 348 * called from any context and the task will be executed in a process 349 * context ASAP. 350 */ 351 void 352 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 353 { 354 struct usb_taskq *taskq; 355 356 taskq = &usb_taskq[queue]; 357 mutex_enter(&taskq->lock); 358 if (task->queue == -1) { 359 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 360 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 361 task->queue = queue; 362 } else { 363 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 364 } 365 cv_signal(&taskq->cv); 366 mutex_exit(&taskq->lock); 367 } 368 369 void 370 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 371 { 372 373 if (task->queue != -1) { 374 struct usb_taskq *taskq = &usb_taskq[task->queue]; 375 mutex_enter(&taskq->lock); 376 TAILQ_REMOVE(&taskq->tasks, task, next); 377 task->queue = -1; 378 mutex_exit(&taskq->lock); 379 } 380 } 381 382 void 383 usb_event_thread(void *arg) 384 { 385 struct usb_softc *sc = arg; 386 387 DPRINTF(("usb_event_thread: start\n")); 388 389 /* 390 * In case this controller is a companion controller to an 391 * EHCI controller we need to wait until the EHCI controller 392 * has grabbed the port. 393 * XXX It would be nicer to do this with a tsleep(), but I don't 394 * know how to synchronize the creation of the threads so it 395 * will work. 396 */ 397 usb_delay_ms(sc->sc_bus, 500); 398 399 /* Make sure first discover does something. */ 400 if (sc->sc_bus->lock) 401 mutex_enter(sc->sc_bus->lock); 402 sc->sc_bus->needs_explore = 1; 403 usb_discover(sc); 404 if (sc->sc_bus->lock) 405 mutex_exit(sc->sc_bus->lock); 406 config_pending_decr(); 407 408 if (sc->sc_bus->lock) 409 mutex_enter(sc->sc_bus->lock); 410 while (!sc->sc_dying) { 411 if (usb_noexplore < 2) 412 usb_discover(sc); 413 414 if (sc->sc_bus->lock) 415 cv_timedwait(&sc->sc_bus->needs_explore_cv, 416 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 417 else 418 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 419 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 420 DPRINTFN(2,("usb_event_thread: woke up\n")); 421 } 422 sc->sc_event_thread = NULL; 423 424 /* In case parent is waiting for us to exit. */ 425 if (sc->sc_bus->lock) { 426 cv_signal(&sc->sc_bus->needs_explore_cv); 427 mutex_exit(sc->sc_bus->lock); 428 } else 429 wakeup(sc); /* XXXSMP ok */ 430 431 DPRINTF(("usb_event_thread: exit\n")); 432 kthread_exit(0); 433 } 434 435 void 436 usb_task_thread(void *arg) 437 { 438 struct usb_task *task; 439 struct usb_taskq *taskq; 440 441 taskq = arg; 442 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 443 444 mutex_enter(&taskq->lock); 445 for (;;) { 446 task = TAILQ_FIRST(&taskq->tasks); 447 if (task == NULL) { 448 cv_wait(&taskq->cv, &taskq->lock); 449 task = TAILQ_FIRST(&taskq->tasks); 450 } 451 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 452 if (task != NULL) { 453 TAILQ_REMOVE(&taskq->tasks, task, next); 454 task->queue = -1; 455 mutex_exit(&taskq->lock); 456 task->fun(task->arg); 457 mutex_enter(&taskq->lock); 458 } 459 } 460 mutex_exit(&taskq->lock); 461 } 462 463 int 464 usbctlprint(void *aux, const char *pnp) 465 { 466 /* only "usb"es can attach to host controllers */ 467 if (pnp) 468 aprint_normal("usb at %s", pnp); 469 470 return (UNCONF); 471 } 472 473 int 474 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 475 { 476 int unit = minor(dev); 477 struct usb_softc *sc; 478 479 if (unit == USB_DEV_MINOR) { 480 if (usb_dev_open) 481 return (EBUSY); 482 usb_dev_open = 1; 483 mutex_enter(proc_lock); 484 usb_async_proc = 0; 485 mutex_exit(proc_lock); 486 return (0); 487 } 488 489 sc = device_lookup_private(&usb_cd, unit); 490 if (!sc) 491 return (ENXIO); 492 493 if (sc->sc_dying) 494 return (EIO); 495 496 return (0); 497 } 498 499 int 500 usbread(dev_t dev, struct uio *uio, int flag) 501 { 502 struct usb_event *ue; 503 #ifdef COMPAT_30 504 struct usb_event_old *ueo = NULL; /* XXXGCC */ 505 #endif 506 int error, n, useold; 507 508 if (minor(dev) != USB_DEV_MINOR) 509 return (ENXIO); 510 511 useold = 0; 512 switch (uio->uio_resid) { 513 #ifdef COMPAT_30 514 case sizeof(struct usb_event_old): 515 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 516 M_WAITOK|M_ZERO); 517 useold = 1; 518 /* FALLTHRU */ 519 #endif 520 case sizeof(struct usb_event): 521 ue = usb_alloc_event(); 522 break; 523 default: 524 return (EINVAL); 525 } 526 527 error = 0; 528 mutex_enter(&usb_event_lock); 529 for (;;) { 530 n = usb_get_next_event(ue); 531 if (n != 0) 532 break; 533 if (flag & IO_NDELAY) { 534 error = EWOULDBLOCK; 535 break; 536 } 537 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 538 if (error) 539 break; 540 } 541 mutex_exit(&usb_event_lock); 542 if (!error) { 543 #ifdef COMPAT_30 544 if (useold) { /* copy fields to old struct */ 545 ueo->ue_type = ue->ue_type; 546 memcpy(&ueo->ue_time, &ue->ue_time, 547 sizeof(struct timespec)); 548 switch (ue->ue_type) { 549 case USB_EVENT_DEVICE_ATTACH: 550 case USB_EVENT_DEVICE_DETACH: 551 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 552 break; 553 554 case USB_EVENT_CTRLR_ATTACH: 555 case USB_EVENT_CTRLR_DETACH: 556 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 557 break; 558 559 case USB_EVENT_DRIVER_ATTACH: 560 case USB_EVENT_DRIVER_DETACH: 561 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 562 memcpy(ueo->u.ue_driver.ue_devname, 563 ue->u.ue_driver.ue_devname, 564 sizeof(ue->u.ue_driver.ue_devname)); 565 break; 566 default: 567 ; 568 } 569 570 error = uiomove((void *)ueo, sizeof *ueo, uio); 571 } else 572 #endif 573 error = uiomove((void *)ue, sizeof *ue, uio); 574 } 575 usb_free_event(ue); 576 #ifdef COMPAT_30 577 if (useold) 578 free(ueo, M_USBDEV); 579 #endif 580 581 return (error); 582 } 583 584 int 585 usbclose(dev_t dev, int flag, int mode, 586 struct lwp *l) 587 { 588 int unit = minor(dev); 589 590 if (unit == USB_DEV_MINOR) { 591 mutex_enter(proc_lock); 592 usb_async_proc = 0; 593 mutex_exit(proc_lock); 594 usb_dev_open = 0; 595 } 596 597 return (0); 598 } 599 600 int 601 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 602 { 603 struct usb_softc *sc; 604 int unit = minor(devt); 605 606 if (unit == USB_DEV_MINOR) { 607 switch (cmd) { 608 case FIONBIO: 609 /* All handled in the upper FS layer. */ 610 return (0); 611 612 case FIOASYNC: 613 mutex_enter(proc_lock); 614 if (*(int *)data) 615 usb_async_proc = l->l_proc; 616 else 617 usb_async_proc = 0; 618 mutex_exit(proc_lock); 619 return (0); 620 621 default: 622 return (EINVAL); 623 } 624 } 625 626 sc = device_lookup_private(&usb_cd, unit); 627 628 if (sc->sc_dying) 629 return (EIO); 630 631 switch (cmd) { 632 #ifdef USB_DEBUG 633 case USB_SETDEBUG: 634 if (!(flag & FWRITE)) 635 return (EBADF); 636 usbdebug = ((*(int *)data) & 0x000000ff); 637 break; 638 #endif /* USB_DEBUG */ 639 case USB_REQUEST: 640 { 641 struct usb_ctl_request *ur = (void *)data; 642 int len = UGETW(ur->ucr_request.wLength); 643 struct iovec iov; 644 struct uio uio; 645 void *ptr = 0; 646 int addr = ur->ucr_addr; 647 usbd_status err; 648 int error = 0; 649 650 if (!(flag & FWRITE)) 651 return (EBADF); 652 653 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 654 if (len < 0 || len > 32768) 655 return (EINVAL); 656 if (addr < 0 || addr >= USB_MAX_DEVICES || 657 sc->sc_bus->devices[addr] == 0) 658 return (EINVAL); 659 if (len != 0) { 660 iov.iov_base = (void *)ur->ucr_data; 661 iov.iov_len = len; 662 uio.uio_iov = &iov; 663 uio.uio_iovcnt = 1; 664 uio.uio_resid = len; 665 uio.uio_offset = 0; 666 uio.uio_rw = 667 ur->ucr_request.bmRequestType & UT_READ ? 668 UIO_READ : UIO_WRITE; 669 uio.uio_vmspace = l->l_proc->p_vmspace; 670 ptr = malloc(len, M_TEMP, M_WAITOK); 671 if (uio.uio_rw == UIO_WRITE) { 672 error = uiomove(ptr, len, &uio); 673 if (error) 674 goto ret; 675 } 676 } 677 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 678 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 679 USBD_DEFAULT_TIMEOUT); 680 if (err) { 681 error = EIO; 682 goto ret; 683 } 684 if (len > ur->ucr_actlen) 685 len = ur->ucr_actlen; 686 if (len != 0) { 687 if (uio.uio_rw == UIO_READ) { 688 error = uiomove(ptr, len, &uio); 689 if (error) 690 goto ret; 691 } 692 } 693 ret: 694 if (ptr) 695 free(ptr, M_TEMP); 696 return (error); 697 } 698 699 case USB_DEVICEINFO: 700 { 701 usbd_device_handle dev; 702 struct usb_device_info *di = (void *)data; 703 int addr = di->udi_addr; 704 705 if (addr < 1 || addr >= USB_MAX_DEVICES) 706 return EINVAL; 707 if ((dev = sc->sc_bus->devices[addr]) == NULL) 708 return ENXIO; 709 usbd_fill_deviceinfo(dev, di, 1); 710 break; 711 } 712 713 #ifdef COMPAT_30 714 case USB_DEVICEINFO_OLD: 715 { 716 usbd_device_handle dev; 717 struct usb_device_info_old *di = (void *)data; 718 int addr = di->udi_addr; 719 720 if (addr < 1 || addr >= USB_MAX_DEVICES) 721 return EINVAL; 722 if ((dev = sc->sc_bus->devices[addr]) == NULL) 723 return ENXIO; 724 usbd_fill_deviceinfo_old(dev, di, 1); 725 break; 726 } 727 #endif 728 729 case USB_DEVICESTATS: 730 *(struct usb_device_stats *)data = sc->sc_bus->stats; 731 break; 732 733 default: 734 return (EINVAL); 735 } 736 return (0); 737 } 738 739 int 740 usbpoll(dev_t dev, int events, struct lwp *l) 741 { 742 int revents, mask; 743 744 if (minor(dev) == USB_DEV_MINOR) { 745 revents = 0; 746 mask = POLLIN | POLLRDNORM; 747 748 mutex_enter(&usb_event_lock); 749 if (events & mask && usb_nevents > 0) 750 revents |= events & mask; 751 if (revents == 0 && events & mask) 752 selrecord(l, &usb_selevent); 753 mutex_exit(&usb_event_lock); 754 755 return (revents); 756 } else { 757 return (0); 758 } 759 } 760 761 static void 762 filt_usbrdetach(struct knote *kn) 763 { 764 765 mutex_enter(&usb_event_lock); 766 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 767 mutex_exit(&usb_event_lock); 768 } 769 770 static int 771 filt_usbread(struct knote *kn, long hint) 772 { 773 774 if (usb_nevents == 0) 775 return (0); 776 777 kn->kn_data = sizeof(struct usb_event); 778 return (1); 779 } 780 781 static const struct filterops usbread_filtops = 782 { 1, NULL, filt_usbrdetach, filt_usbread }; 783 784 int 785 usbkqfilter(dev_t dev, struct knote *kn) 786 { 787 struct klist *klist; 788 789 switch (kn->kn_filter) { 790 case EVFILT_READ: 791 if (minor(dev) != USB_DEV_MINOR) 792 return (1); 793 klist = &usb_selevent.sel_klist; 794 kn->kn_fop = &usbread_filtops; 795 break; 796 797 default: 798 return (EINVAL); 799 } 800 801 kn->kn_hook = NULL; 802 803 mutex_enter(&usb_event_lock); 804 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 805 mutex_exit(&usb_event_lock); 806 807 return (0); 808 } 809 810 /* Explore device tree from the root. */ 811 Static void 812 usb_discover(struct usb_softc *sc) 813 { 814 815 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 816 817 DPRINTFN(2,("usb_discover\n")); 818 if (usb_noexplore > 1) 819 return; 820 /* 821 * We need mutual exclusion while traversing the device tree, 822 * but this is guaranteed since this function is only called 823 * from the event thread for the controller. 824 * 825 * Also, we now have sc_bus->lock held for MPSAFE controllers. 826 */ 827 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 828 sc->sc_bus->needs_explore = 0; 829 if (sc->sc_bus->lock) 830 mutex_exit(sc->sc_bus->lock); 831 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 832 if (sc->sc_bus->lock) 833 mutex_enter(sc->sc_bus->lock); 834 } 835 } 836 837 void 838 usb_needs_explore(usbd_device_handle dev) 839 { 840 DPRINTFN(2,("usb_needs_explore\n")); 841 if (dev->bus->lock) 842 mutex_enter(dev->bus->lock); 843 dev->bus->needs_explore = 1; 844 if (dev->bus->lock) { 845 cv_signal(&dev->bus->needs_explore_cv); 846 mutex_exit(dev->bus->lock); 847 } else 848 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 849 } 850 851 void 852 usb_needs_reattach(usbd_device_handle dev) 853 { 854 DPRINTFN(2,("usb_needs_reattach\n")); 855 if (dev->bus->lock) 856 mutex_enter(dev->bus->lock); 857 dev->powersrc->reattach = 1; 858 dev->bus->needs_explore = 1; 859 if (dev->bus->lock) { 860 cv_signal(&dev->bus->needs_explore_cv); 861 mutex_exit(dev->bus->lock); 862 } else 863 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 864 } 865 866 /* Called at with usb_event_lock held. */ 867 int 868 usb_get_next_event(struct usb_event *ue) 869 { 870 struct usb_event_q *ueq; 871 872 KASSERT(mutex_owned(&usb_event_lock)); 873 874 if (usb_nevents <= 0) 875 return (0); 876 ueq = SIMPLEQ_FIRST(&usb_events); 877 #ifdef DIAGNOSTIC 878 if (ueq == NULL) { 879 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 880 usb_nevents = 0; 881 return (0); 882 } 883 #endif 884 if (ue) 885 *ue = ueq->ue; 886 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 887 usb_free_event((struct usb_event *)(void *)ueq); 888 usb_nevents--; 889 return (1); 890 } 891 892 void 893 usbd_add_dev_event(int type, usbd_device_handle udev) 894 { 895 struct usb_event *ue = usb_alloc_event(); 896 897 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 898 usb_add_event(type, ue); 899 } 900 901 void 902 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 903 { 904 struct usb_event *ue = usb_alloc_event(); 905 906 ue->u.ue_driver.ue_cookie = udev->cookie; 907 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 908 sizeof ue->u.ue_driver.ue_devname); 909 usb_add_event(type, ue); 910 } 911 912 Static struct usb_event * 913 usb_alloc_event(void) 914 { 915 /* Yes, this is right; we allocate enough so that we can use it later */ 916 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 917 } 918 919 Static void 920 usb_free_event(struct usb_event *uep) 921 { 922 free(uep, M_USBDEV); 923 } 924 925 Static void 926 usb_add_event(int type, struct usb_event *uep) 927 { 928 struct usb_event_q *ueq; 929 struct timeval thetime; 930 931 microtime(&thetime); 932 /* Don't want to wait here with usb_event_lock held */ 933 ueq = (struct usb_event_q *)(void *)uep; 934 ueq->ue = *uep; 935 ueq->ue.ue_type = type; 936 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 937 938 mutex_enter(&usb_event_lock); 939 if (++usb_nevents >= USB_MAX_EVENTS) { 940 /* Too many queued events, drop an old one. */ 941 DPRINTFN(-1,("usb: event dropped\n")); 942 (void)usb_get_next_event(0); 943 } 944 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 945 cv_signal(&usb_event_cv); 946 selnotify(&usb_selevent, 0, 0); 947 if (usb_async_proc != NULL) { 948 kpreempt_disable(); 949 softint_schedule(usb_async_sih); 950 kpreempt_enable(); 951 } 952 mutex_exit(&usb_event_lock); 953 } 954 955 Static void 956 usb_async_intr(void *cookie) 957 { 958 proc_t *proc; 959 960 mutex_enter(proc_lock); 961 if ((proc = usb_async_proc) != NULL) 962 psignal(proc, SIGIO); 963 mutex_exit(proc_lock); 964 } 965 966 Static void 967 usb_soft_intr(void *arg) 968 { 969 usbd_bus_handle bus = arg; 970 971 if (bus->lock) 972 mutex_enter(bus->lock); 973 (*bus->methods->soft_intr)(bus); 974 if (bus->lock) 975 mutex_exit(bus->lock); 976 } 977 978 void 979 usb_schedsoftintr(usbd_bus_handle bus) 980 { 981 982 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 983 984 if (bus->use_polling) { 985 bus->methods->soft_intr(bus); 986 } else { 987 kpreempt_disable(); 988 softint_schedule(bus->soft); 989 kpreempt_enable(); 990 } 991 } 992 993 int 994 usb_activate(device_t self, enum devact act) 995 { 996 struct usb_softc *sc = device_private(self); 997 998 switch (act) { 999 case DVACT_DEACTIVATE: 1000 sc->sc_dying = 1; 1001 return 0; 1002 default: 1003 return EOPNOTSUPP; 1004 } 1005 } 1006 1007 void 1008 usb_childdet(device_t self, device_t child) 1009 { 1010 int i; 1011 struct usb_softc *sc = device_private(self); 1012 struct usbd_device *dev; 1013 1014 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1015 return; 1016 1017 for (i = 0; i < dev->subdevlen; i++) 1018 if (dev->subdevs[i] == child) 1019 dev->subdevs[i] = NULL; 1020 } 1021 1022 int 1023 usb_detach(device_t self, int flags) 1024 { 1025 struct usb_softc *sc = device_private(self); 1026 struct usb_event *ue; 1027 int rc; 1028 1029 DPRINTF(("usb_detach: start\n")); 1030 1031 /* Make all devices disconnect. */ 1032 if (sc->sc_port.device != NULL && 1033 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1034 return rc; 1035 1036 pmf_device_deregister(self); 1037 /* Kill off event thread. */ 1038 sc->sc_dying = 1; 1039 while (sc->sc_event_thread != NULL) { 1040 if (sc->sc_bus->lock) { 1041 mutex_enter(sc->sc_bus->lock); 1042 cv_signal(&sc->sc_bus->needs_explore_cv); 1043 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1044 sc->sc_bus->lock, hz * 60); 1045 mutex_exit(sc->sc_bus->lock); 1046 } else { 1047 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1048 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1049 } 1050 } 1051 DPRINTF(("usb_detach: event thread dead\n")); 1052 1053 if (sc->sc_bus->soft != NULL) { 1054 softint_disestablish(sc->sc_bus->soft); 1055 sc->sc_bus->soft = NULL; 1056 } 1057 1058 ue = usb_alloc_event(); 1059 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1060 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1061 1062 cv_destroy(&sc->sc_bus->needs_explore_cv); 1063 1064 return (0); 1065 } 1066 1067 #ifdef COMPAT_30 1068 Static void 1069 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1070 const struct usb_device_info *ue) 1071 { 1072 const unsigned char *p; 1073 unsigned char *q; 1074 int i, n; 1075 1076 uo->udi_bus = ue->udi_bus; 1077 uo->udi_addr = ue->udi_addr; 1078 uo->udi_cookie = ue->udi_cookie; 1079 for (i = 0, p = (const unsigned char *)ue->udi_product, 1080 q = (unsigned char *)uo->udi_product; 1081 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1082 if (*p < 0x80) 1083 q[i++] = *p; 1084 else { 1085 q[i++] = '?'; 1086 if ((*p & 0xe0) == 0xe0) 1087 p++; 1088 p++; 1089 } 1090 } 1091 q[i] = 0; 1092 1093 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1094 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1095 if (* p < 0x80) 1096 q[i++] = *p; 1097 else { 1098 q[i++] = '?'; 1099 p++; 1100 if ((*p & 0xe0) == 0xe0) 1101 p++; 1102 } 1103 } 1104 q[i] = 0; 1105 1106 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1107 1108 uo->udi_productNo = ue->udi_productNo; 1109 uo->udi_vendorNo = ue->udi_vendorNo; 1110 uo->udi_releaseNo = ue->udi_releaseNo; 1111 uo->udi_class = ue->udi_class; 1112 uo->udi_subclass = ue->udi_subclass; 1113 uo->udi_protocol = ue->udi_protocol; 1114 uo->udi_config = ue->udi_config; 1115 uo->udi_speed = ue->udi_speed; 1116 uo->udi_power = ue->udi_power; 1117 uo->udi_nports = ue->udi_nports; 1118 1119 for (n=0; n<USB_MAX_DEVNAMES; n++) 1120 memcpy(uo->udi_devnames[n], 1121 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1122 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1123 } 1124 #endif 1125
Indexes created Wed Sep 24 22:09:59 GMT 2025