usb.c revision 1.137
1 /* $NetBSD: usb.c,v 1.137 2013/01/05 01:30:17 christos 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 1.137 2013/01/05 01:30:17 christos Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_compat_netbsd.h" 44 #include "opt_usb.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/malloc.h> 51 #include <sys/device.h> 52 #include <sys/kthread.h> 53 #include <sys/proc.h> 54 #include <sys/conf.h> 55 #include <sys/fcntl.h> 56 #include <sys/poll.h> 57 #include <sys/select.h> 58 #include <sys/vnode.h> 59 #include <sys/signalvar.h> 60 #include <sys/intr.h> 61 #include <sys/module.h> 62 #include <sys/mutex.h> 63 #include <sys/bus.h> 64 #include <sys/once.h> 65 66 #include <dev/usb/usb.h> 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 #include <dev/usb/usbdivar.h> 70 #include <dev/usb/usb_verbose.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #define USB_DEV_MINOR 255 74 75 #ifdef USB_DEBUG 76 #define DPRINTF(x) if (usbdebug) printf x 77 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 78 int usbdebug = 0; 79 /* 80 * 0 - do usual exploration 81 * 1 - do not use timeout exploration 82 * >1 - do no exploration 83 */ 84 int usb_noexplore = 0; 85 #else 86 #define DPRINTF(x) 87 #define DPRINTFN(n,x) 88 #define usb_noexplore 0 89 #endif 90 91 struct usb_softc { 92 #if 0 93 device_t sc_dev; /* base device */ 94 #endif 95 usbd_bus_handle sc_bus; /* USB controller */ 96 struct usbd_port sc_port; /* dummy port for root hub */ 97 98 struct lwp *sc_event_thread; 99 100 char sc_dying; 101 }; 102 103 struct usb_taskq { 104 TAILQ_HEAD(, usb_task) tasks; 105 kmutex_t lock; 106 kcondvar_t cv; 107 struct lwp *task_thread_lwp; 108 const char *name; 109 }; 110 111 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 112 113 dev_type_open(usbopen); 114 dev_type_close(usbclose); 115 dev_type_read(usbread); 116 dev_type_ioctl(usbioctl); 117 dev_type_poll(usbpoll); 118 dev_type_kqfilter(usbkqfilter); 119 120 const struct cdevsw usb_cdevsw = { 121 usbopen, usbclose, usbread, nowrite, usbioctl, 122 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 123 }; 124 125 Static void usb_discover(struct usb_softc *); 126 Static void usb_create_event_thread(device_t); 127 Static void usb_event_thread(void *); 128 Static void usb_task_thread(void *); 129 130 #define USB_MAX_EVENTS 100 131 struct usb_event_q { 132 struct usb_event ue; 133 SIMPLEQ_ENTRY(usb_event_q) next; 134 }; 135 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 136 SIMPLEQ_HEAD_INITIALIZER(usb_events); 137 Static int usb_nevents = 0; 138 Static struct selinfo usb_selevent; 139 Static kmutex_t usb_event_lock; 140 Static kcondvar_t usb_event_cv; 141 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 142 Static void *usb_async_sih; 143 Static int usb_dev_open = 0; 144 Static struct usb_event *usb_alloc_event(void); 145 Static void usb_free_event(struct usb_event *); 146 Static void usb_add_event(int, struct usb_event *); 147 Static int usb_get_next_event(struct usb_event *); 148 Static void usb_async_intr(void *); 149 Static void usb_soft_intr(void *); 150 151 #ifdef COMPAT_30 152 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 153 #endif 154 155 Static const char *usbrev_str[] = USBREV_STR; 156 157 static int usb_match(device_t, cfdata_t, void *); 158 static void usb_attach(device_t, device_t, void *); 159 static int usb_detach(device_t, int); 160 static int usb_activate(device_t, enum devact); 161 static void usb_childdet(device_t, device_t); 162 static int usb_once_init(void); 163 static void usb_doattach(device_t); 164 165 extern struct cfdriver usb_cd; 166 167 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 168 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 169 DVF_DETACH_SHUTDOWN); 170 171 static const char *taskq_names[] = USB_TASKQ_NAMES; 172 173 int 174 usb_match(device_t parent, cfdata_t match, void *aux) 175 { 176 DPRINTF(("usbd_match\n")); 177 return (UMATCH_GENERIC); 178 } 179 180 void 181 usb_attach(device_t parent, device_t self, void *aux) 182 { 183 static ONCE_DECL(init_control); 184 struct usb_softc *sc = device_private(self); 185 bool mpsafe; 186 int usbrev; 187 188 sc->sc_bus = aux; 189 mpsafe = sc->sc_bus->methods->get_lock ? true : false; 190 usbrev = sc->sc_bus->usbrev; 191 192 aprint_naive("\n"); 193 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 194 switch (usbrev) { 195 case USBREV_1_0: 196 case USBREV_1_1: 197 case USBREV_2_0: 198 break; 199 default: 200 aprint_error(", not supported\n"); 201 sc->sc_dying = 1; 202 return; 203 } 204 aprint_normal("\n"); 205 206 if (mpsafe) 207 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 208 else 209 sc->sc_bus->lock = NULL; 210 211 RUN_ONCE(&init_control, usb_once_init); 212 config_interrupts(self, usb_doattach); 213 } 214 215 static int 216 usb_once_init(void) 217 { 218 struct usb_taskq *taskq; 219 int i; 220 221 selinit(&usb_selevent); 222 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 223 cv_init(&usb_event_cv, "usbrea"); 224 225 for (i = 0; i < USB_NUM_TASKQS; i++) { 226 taskq = &usb_taskq[i]; 227 228 TAILQ_INIT(&taskq->tasks); 229 /* 230 * Since USB tasks are callable from any context, we have to 231 * make this lock a spinlock. 232 */ 233 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 234 cv_init(&taskq->cv, "usbtsk"); 235 taskq->name = taskq_names[i]; 236 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 237 usb_task_thread, taskq, &taskq->task_thread_lwp, 238 "%s", taskq->name)) { 239 printf("unable to create task thread: %s\n", taskq->name); 240 panic("usb_create_event_thread task"); 241 } 242 /* 243 * XXX we should make sure these threads are alive before 244 * end up using them in usb_doattach(). 245 */ 246 } 247 return 0; 248 } 249 250 static void 251 usb_doattach(device_t self) 252 { 253 struct usb_softc *sc = device_private(self); 254 usbd_device_handle dev; 255 usbd_status err; 256 int speed; 257 struct usb_event *ue; 258 const bool mpsafe = sc->sc_bus->methods->get_lock ? true : false; 259 260 DPRINTF(("usbd_doattach\n")); 261 262 sc->sc_bus->usbctl = self; 263 sc->sc_port.power = USB_MAX_POWER; 264 265 switch (sc->sc_bus->usbrev) { 266 case USBREV_1_0: 267 case USBREV_1_1: 268 speed = USB_SPEED_FULL; 269 break; 270 case USBREV_2_0: 271 speed = USB_SPEED_HIGH; 272 break; 273 default: 274 panic("usb_doattach"); 275 } 276 277 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 278 279 ue = usb_alloc_event(); 280 ue->u.ue_ctrlr.ue_bus = device_unit(self); 281 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 282 283 /* XXX we should have our own level */ 284 sc->sc_bus->soft = softint_establish( 285 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 286 usb_soft_intr, sc->sc_bus); 287 if (sc->sc_bus->soft == NULL) { 288 aprint_error("%s: can't register softintr\n", 289 device_xname(self)); 290 sc->sc_dying = 1; 291 return; 292 } 293 294 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 295 &sc->sc_port); 296 if (!err) { 297 dev = sc->sc_port.device; 298 if (dev->hub == NULL) { 299 sc->sc_dying = 1; 300 aprint_error("%s: root device is not a hub\n", 301 device_xname(self)); 302 return; 303 } 304 sc->sc_bus->root_hub = dev; 305 usb_create_event_thread(self); 306 #if 1 307 /* 308 * Turning this code off will delay attachment of USB devices 309 * until the USB event thread is running, which means that 310 * the keyboard will not work until after cold boot. 311 */ 312 if (cold && (device_cfdata(self)->cf_flags & 1)) 313 dev->hub->explore(sc->sc_bus->root_hub); 314 #endif 315 } else { 316 aprint_error("%s: root hub problem, error=%d\n", 317 device_xname(self), err); 318 sc->sc_dying = 1; 319 } 320 321 config_pending_incr(); 322 323 if (!pmf_device_register(self, NULL, NULL)) 324 aprint_error_dev(self, "couldn't establish power handler\n"); 325 326 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 327 usb_async_intr, NULL); 328 329 return; 330 } 331 332 void 333 usb_create_event_thread(device_t self) 334 { 335 struct usb_softc *sc = device_private(self); 336 337 if (kthread_create(PRI_NONE, 338 sc->sc_bus->lock ? KTHREAD_MPSAFE : 0, NULL, 339 usb_event_thread, sc, &sc->sc_event_thread, 340 "%s", device_xname(self))) { 341 printf("%s: unable to create event thread for\n", 342 device_xname(self)); 343 panic("usb_create_event_thread"); 344 } 345 } 346 347 /* 348 * Add a task to be performed by the task thread. This function can be 349 * called from any context and the task will be executed in a process 350 * context ASAP. 351 */ 352 void 353 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 354 { 355 struct usb_taskq *taskq; 356 357 taskq = &usb_taskq[queue]; 358 mutex_enter(&taskq->lock); 359 if (task->queue == -1) { 360 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 361 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 362 task->queue = queue; 363 } else { 364 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 365 } 366 cv_signal(&taskq->cv); 367 mutex_exit(&taskq->lock); 368 } 369 370 void 371 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 372 { 373 374 if (task->queue != -1) { 375 struct usb_taskq *taskq = &usb_taskq[task->queue]; 376 mutex_enter(&taskq->lock); 377 TAILQ_REMOVE(&taskq->tasks, task, next); 378 task->queue = -1; 379 mutex_exit(&taskq->lock); 380 } 381 } 382 383 void 384 usb_event_thread(void *arg) 385 { 386 struct usb_softc *sc = arg; 387 388 DPRINTF(("usb_event_thread: start\n")); 389 390 /* 391 * In case this controller is a companion controller to an 392 * EHCI controller we need to wait until the EHCI controller 393 * has grabbed the port. 394 * XXX It would be nicer to do this with a tsleep(), but I don't 395 * know how to synchronize the creation of the threads so it 396 * will work. 397 */ 398 usb_delay_ms(sc->sc_bus, 500); 399 400 /* Make sure first discover does something. */ 401 if (sc->sc_bus->lock) 402 mutex_enter(sc->sc_bus->lock); 403 sc->sc_bus->needs_explore = 1; 404 usb_discover(sc); 405 if (sc->sc_bus->lock) 406 mutex_exit(sc->sc_bus->lock); 407 config_pending_decr(); 408 409 if (sc->sc_bus->lock) 410 mutex_enter(sc->sc_bus->lock); 411 while (!sc->sc_dying) { 412 if (usb_noexplore < 2) 413 usb_discover(sc); 414 415 if (sc->sc_bus->lock) 416 cv_timedwait(&sc->sc_bus->needs_explore_cv, 417 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 418 else 419 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 420 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 421 DPRINTFN(2,("usb_event_thread: woke up\n")); 422 } 423 sc->sc_event_thread = NULL; 424 425 /* In case parent is waiting for us to exit. */ 426 if (sc->sc_bus->lock) { 427 cv_signal(&sc->sc_bus->needs_explore_cv); 428 mutex_exit(sc->sc_bus->lock); 429 } else 430 wakeup(sc); /* XXXSMP ok */ 431 432 DPRINTF(("usb_event_thread: exit\n")); 433 kthread_exit(0); 434 } 435 436 void 437 usb_task_thread(void *arg) 438 { 439 struct usb_task *task; 440 struct usb_taskq *taskq; 441 442 taskq = arg; 443 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 444 445 mutex_enter(&taskq->lock); 446 for (;;) { 447 task = TAILQ_FIRST(&taskq->tasks); 448 if (task == NULL) { 449 cv_wait(&taskq->cv, &taskq->lock); 450 task = TAILQ_FIRST(&taskq->tasks); 451 } 452 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 453 if (task != NULL) { 454 TAILQ_REMOVE(&taskq->tasks, task, next); 455 task->queue = -1; 456 mutex_exit(&taskq->lock); 457 task->fun(task->arg); 458 mutex_enter(&taskq->lock); 459 } 460 } 461 mutex_exit(&taskq->lock); 462 } 463 464 int 465 usbctlprint(void *aux, const char *pnp) 466 { 467 /* only "usb"es can attach to host controllers */ 468 if (pnp) 469 aprint_normal("usb at %s", pnp); 470 471 return (UNCONF); 472 } 473 474 int 475 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 476 { 477 int unit = minor(dev); 478 struct usb_softc *sc; 479 480 if (unit == USB_DEV_MINOR) { 481 if (usb_dev_open) 482 return (EBUSY); 483 usb_dev_open = 1; 484 mutex_enter(proc_lock); 485 usb_async_proc = 0; 486 mutex_exit(proc_lock); 487 return (0); 488 } 489 490 sc = device_lookup_private(&usb_cd, unit); 491 if (!sc) 492 return (ENXIO); 493 494 if (sc->sc_dying) 495 return (EIO); 496 497 return (0); 498 } 499 500 int 501 usbread(dev_t dev, struct uio *uio, int flag) 502 { 503 struct usb_event *ue; 504 #ifdef COMPAT_30 505 struct usb_event_old *ueo = NULL; /* XXXGCC */ 506 #endif 507 int error, n, useold; 508 509 if (minor(dev) != USB_DEV_MINOR) 510 return (ENXIO); 511 512 useold = 0; 513 switch (uio->uio_resid) { 514 #ifdef COMPAT_30 515 case sizeof(struct usb_event_old): 516 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 517 M_WAITOK|M_ZERO); 518 useold = 1; 519 /* FALLTHRU */ 520 #endif 521 case sizeof(struct usb_event): 522 ue = usb_alloc_event(); 523 break; 524 default: 525 return (EINVAL); 526 } 527 528 error = 0; 529 mutex_enter(&usb_event_lock); 530 for (;;) { 531 n = usb_get_next_event(ue); 532 if (n != 0) 533 break; 534 if (flag & IO_NDELAY) { 535 error = EWOULDBLOCK; 536 break; 537 } 538 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 539 if (error) 540 break; 541 } 542 mutex_exit(&usb_event_lock); 543 if (!error) { 544 #ifdef COMPAT_30 545 if (useold) { /* copy fields to old struct */ 546 ueo->ue_type = ue->ue_type; 547 memcpy(&ueo->ue_time, &ue->ue_time, 548 sizeof(struct timespec)); 549 switch (ue->ue_type) { 550 case USB_EVENT_DEVICE_ATTACH: 551 case USB_EVENT_DEVICE_DETACH: 552 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 553 break; 554 555 case USB_EVENT_CTRLR_ATTACH: 556 case USB_EVENT_CTRLR_DETACH: 557 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 558 break; 559 560 case USB_EVENT_DRIVER_ATTACH: 561 case USB_EVENT_DRIVER_DETACH: 562 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 563 memcpy(ueo->u.ue_driver.ue_devname, 564 ue->u.ue_driver.ue_devname, 565 sizeof(ue->u.ue_driver.ue_devname)); 566 break; 567 default: 568 ; 569 } 570 571 error = uiomove((void *)ueo, sizeof *ueo, uio); 572 } else 573 #endif 574 error = uiomove((void *)ue, sizeof *ue, uio); 575 } 576 usb_free_event(ue); 577 #ifdef COMPAT_30 578 if (useold) 579 free(ueo, M_USBDEV); 580 #endif 581 582 return (error); 583 } 584 585 int 586 usbclose(dev_t dev, int flag, int mode, 587 struct lwp *l) 588 { 589 int unit = minor(dev); 590 591 if (unit == USB_DEV_MINOR) { 592 mutex_enter(proc_lock); 593 usb_async_proc = 0; 594 mutex_exit(proc_lock); 595 usb_dev_open = 0; 596 } 597 598 return (0); 599 } 600 601 int 602 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 603 { 604 struct usb_softc *sc; 605 int unit = minor(devt); 606 607 if (unit == USB_DEV_MINOR) { 608 switch (cmd) { 609 case FIONBIO: 610 /* All handled in the upper FS layer. */ 611 return (0); 612 613 case FIOASYNC: 614 mutex_enter(proc_lock); 615 if (*(int *)data) 616 usb_async_proc = l->l_proc; 617 else 618 usb_async_proc = 0; 619 mutex_exit(proc_lock); 620 return (0); 621 622 default: 623 return (EINVAL); 624 } 625 } 626 627 sc = device_lookup_private(&usb_cd, unit); 628 629 if (sc->sc_dying) 630 return (EIO); 631 632 switch (cmd) { 633 #ifdef USB_DEBUG 634 case USB_SETDEBUG: 635 if (!(flag & FWRITE)) 636 return (EBADF); 637 usbdebug = ((*(int *)data) & 0x000000ff); 638 break; 639 #endif /* USB_DEBUG */ 640 case USB_REQUEST: 641 { 642 struct usb_ctl_request *ur = (void *)data; 643 int len = UGETW(ur->ucr_request.wLength); 644 struct iovec iov; 645 struct uio uio; 646 void *ptr = 0; 647 int addr = ur->ucr_addr; 648 usbd_status err; 649 int error = 0; 650 651 if (!(flag & FWRITE)) 652 return (EBADF); 653 654 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 655 if (len < 0 || len > 32768) 656 return (EINVAL); 657 if (addr < 0 || addr >= USB_MAX_DEVICES || 658 sc->sc_bus->devices[addr] == 0) 659 return (EINVAL); 660 if (len != 0) { 661 iov.iov_base = (void *)ur->ucr_data; 662 iov.iov_len = len; 663 uio.uio_iov = &iov; 664 uio.uio_iovcnt = 1; 665 uio.uio_resid = len; 666 uio.uio_offset = 0; 667 uio.uio_rw = 668 ur->ucr_request.bmRequestType & UT_READ ? 669 UIO_READ : UIO_WRITE; 670 uio.uio_vmspace = l->l_proc->p_vmspace; 671 ptr = malloc(len, M_TEMP, M_WAITOK); 672 if (uio.uio_rw == UIO_WRITE) { 673 error = uiomove(ptr, len, &uio); 674 if (error) 675 goto ret; 676 } 677 } 678 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 679 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 680 USBD_DEFAULT_TIMEOUT); 681 if (err) { 682 error = EIO; 683 goto ret; 684 } 685 if (len > ur->ucr_actlen) 686 len = ur->ucr_actlen; 687 if (len != 0) { 688 if (uio.uio_rw == UIO_READ) { 689 error = uiomove(ptr, len, &uio); 690 if (error) 691 goto ret; 692 } 693 } 694 ret: 695 if (ptr) 696 free(ptr, M_TEMP); 697 return (error); 698 } 699 700 case USB_DEVICEINFO: 701 { 702 usbd_device_handle dev; 703 struct usb_device_info *di = (void *)data; 704 int addr = di->udi_addr; 705 706 if (addr < 1 || addr >= USB_MAX_DEVICES) 707 return EINVAL; 708 if ((dev = sc->sc_bus->devices[addr]) == NULL) 709 return ENXIO; 710 usbd_fill_deviceinfo(dev, di, 1); 711 break; 712 } 713 714 #ifdef COMPAT_30 715 case USB_DEVICEINFO_OLD: 716 { 717 usbd_device_handle dev; 718 struct usb_device_info_old *di = (void *)data; 719 int addr = di->udi_addr; 720 721 if (addr < 1 || addr >= USB_MAX_DEVICES) 722 return EINVAL; 723 if ((dev = sc->sc_bus->devices[addr]) == NULL) 724 return ENXIO; 725 usbd_fill_deviceinfo_old(dev, di, 1); 726 break; 727 } 728 #endif 729 730 case USB_DEVICESTATS: 731 *(struct usb_device_stats *)data = sc->sc_bus->stats; 732 break; 733 734 default: 735 return (EINVAL); 736 } 737 return (0); 738 } 739 740 int 741 usbpoll(dev_t dev, int events, struct lwp *l) 742 { 743 int revents, mask; 744 745 if (minor(dev) == USB_DEV_MINOR) { 746 revents = 0; 747 mask = POLLIN | POLLRDNORM; 748 749 mutex_enter(&usb_event_lock); 750 if (events & mask && usb_nevents > 0) 751 revents |= events & mask; 752 if (revents == 0 && events & mask) 753 selrecord(l, &usb_selevent); 754 mutex_exit(&usb_event_lock); 755 756 return (revents); 757 } else { 758 return (0); 759 } 760 } 761 762 static void 763 filt_usbrdetach(struct knote *kn) 764 { 765 766 mutex_enter(&usb_event_lock); 767 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 768 mutex_exit(&usb_event_lock); 769 } 770 771 static int 772 filt_usbread(struct knote *kn, long hint) 773 { 774 775 if (usb_nevents == 0) 776 return (0); 777 778 kn->kn_data = sizeof(struct usb_event); 779 return (1); 780 } 781 782 static const struct filterops usbread_filtops = 783 { 1, NULL, filt_usbrdetach, filt_usbread }; 784 785 int 786 usbkqfilter(dev_t dev, struct knote *kn) 787 { 788 struct klist *klist; 789 790 switch (kn->kn_filter) { 791 case EVFILT_READ: 792 if (minor(dev) != USB_DEV_MINOR) 793 return (1); 794 klist = &usb_selevent.sel_klist; 795 kn->kn_fop = &usbread_filtops; 796 break; 797 798 default: 799 return (EINVAL); 800 } 801 802 kn->kn_hook = NULL; 803 804 mutex_enter(&usb_event_lock); 805 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 806 mutex_exit(&usb_event_lock); 807 808 return (0); 809 } 810 811 /* Explore device tree from the root. */ 812 Static void 813 usb_discover(struct usb_softc *sc) 814 { 815 816 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 817 818 DPRINTFN(2,("usb_discover\n")); 819 if (usb_noexplore > 1) 820 return; 821 /* 822 * We need mutual exclusion while traversing the device tree, 823 * but this is guaranteed since this function is only called 824 * from the event thread for the controller. 825 * 826 * Also, we now have sc_bus->lock held for MPSAFE controllers. 827 */ 828 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 829 sc->sc_bus->needs_explore = 0; 830 if (sc->sc_bus->lock) 831 mutex_exit(sc->sc_bus->lock); 832 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 833 if (sc->sc_bus->lock) 834 mutex_enter(sc->sc_bus->lock); 835 } 836 } 837 838 void 839 usb_needs_explore(usbd_device_handle dev) 840 { 841 DPRINTFN(2,("usb_needs_explore\n")); 842 if (dev->bus->lock) 843 mutex_enter(dev->bus->lock); 844 dev->bus->needs_explore = 1; 845 if (dev->bus->lock) { 846 cv_signal(&dev->bus->needs_explore_cv); 847 mutex_exit(dev->bus->lock); 848 } else 849 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 850 } 851 852 void 853 usb_needs_reattach(usbd_device_handle dev) 854 { 855 DPRINTFN(2,("usb_needs_reattach\n")); 856 if (dev->bus->lock) 857 mutex_enter(dev->bus->lock); 858 dev->powersrc->reattach = 1; 859 dev->bus->needs_explore = 1; 860 if (dev->bus->lock) { 861 cv_signal(&dev->bus->needs_explore_cv); 862 mutex_exit(dev->bus->lock); 863 } else 864 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 865 } 866 867 /* Called at with usb_event_lock held. */ 868 int 869 usb_get_next_event(struct usb_event *ue) 870 { 871 struct usb_event_q *ueq; 872 873 KASSERT(mutex_owned(&usb_event_lock)); 874 875 if (usb_nevents <= 0) 876 return (0); 877 ueq = SIMPLEQ_FIRST(&usb_events); 878 #ifdef DIAGNOSTIC 879 if (ueq == NULL) { 880 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 881 usb_nevents = 0; 882 return (0); 883 } 884 #endif 885 if (ue) 886 *ue = ueq->ue; 887 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 888 usb_free_event((struct usb_event *)(void *)ueq); 889 usb_nevents--; 890 return (1); 891 } 892 893 void 894 usbd_add_dev_event(int type, usbd_device_handle udev) 895 { 896 struct usb_event *ue = usb_alloc_event(); 897 898 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 899 usb_add_event(type, ue); 900 } 901 902 void 903 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 904 { 905 struct usb_event *ue = usb_alloc_event(); 906 907 ue->u.ue_driver.ue_cookie = udev->cookie; 908 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 909 sizeof ue->u.ue_driver.ue_devname); 910 usb_add_event(type, ue); 911 } 912 913 Static struct usb_event * 914 usb_alloc_event(void) 915 { 916 /* Yes, this is right; we allocate enough so that we can use it later */ 917 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 918 } 919 920 Static void 921 usb_free_event(struct usb_event *uep) 922 { 923 free(uep, M_USBDEV); 924 } 925 926 Static void 927 usb_add_event(int type, struct usb_event *uep) 928 { 929 struct usb_event_q *ueq; 930 struct timeval thetime; 931 932 microtime(&thetime); 933 /* Don't want to wait here with usb_event_lock held */ 934 ueq = (struct usb_event_q *)(void *)uep; 935 ueq->ue = *uep; 936 ueq->ue.ue_type = type; 937 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 938 939 mutex_enter(&usb_event_lock); 940 if (++usb_nevents >= USB_MAX_EVENTS) { 941 /* Too many queued events, drop an old one. */ 942 DPRINTFN(-1,("usb: event dropped\n")); 943 (void)usb_get_next_event(0); 944 } 945 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 946 cv_signal(&usb_event_cv); 947 selnotify(&usb_selevent, 0, 0); 948 if (usb_async_proc != NULL) { 949 kpreempt_disable(); 950 softint_schedule(usb_async_sih); 951 kpreempt_enable(); 952 } 953 mutex_exit(&usb_event_lock); 954 } 955 956 Static void 957 usb_async_intr(void *cookie) 958 { 959 proc_t *proc; 960 961 mutex_enter(proc_lock); 962 if ((proc = usb_async_proc) != NULL) 963 psignal(proc, SIGIO); 964 mutex_exit(proc_lock); 965 } 966 967 Static void 968 usb_soft_intr(void *arg) 969 { 970 usbd_bus_handle bus = arg; 971 972 if (bus->lock) 973 mutex_enter(bus->lock); 974 (*bus->methods->soft_intr)(bus); 975 if (bus->lock) 976 mutex_exit(bus->lock); 977 } 978 979 void 980 usb_schedsoftintr(usbd_bus_handle bus) 981 { 982 983 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 984 985 if (bus->use_polling) { 986 bus->methods->soft_intr(bus); 987 } else { 988 kpreempt_disable(); 989 softint_schedule(bus->soft); 990 kpreempt_enable(); 991 } 992 } 993 994 int 995 usb_activate(device_t self, enum devact act) 996 { 997 struct usb_softc *sc = device_private(self); 998 999 switch (act) { 1000 case DVACT_DEACTIVATE: 1001 sc->sc_dying = 1; 1002 return 0; 1003 default: 1004 return EOPNOTSUPP; 1005 } 1006 } 1007 1008 void 1009 usb_childdet(device_t self, device_t child) 1010 { 1011 int i; 1012 struct usb_softc *sc = device_private(self); 1013 struct usbd_device *dev; 1014 1015 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1016 return; 1017 1018 for (i = 0; i < dev->subdevlen; i++) 1019 if (dev->subdevs[i] == child) 1020 dev->subdevs[i] = NULL; 1021 } 1022 1023 int 1024 usb_detach(device_t self, int flags) 1025 { 1026 struct usb_softc *sc = device_private(self); 1027 struct usb_event *ue; 1028 int rc; 1029 1030 DPRINTF(("usb_detach: start\n")); 1031 1032 /* Make all devices disconnect. */ 1033 if (sc->sc_port.device != NULL && 1034 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1035 return rc; 1036 1037 pmf_device_deregister(self); 1038 /* Kill off event thread. */ 1039 sc->sc_dying = 1; 1040 while (sc->sc_event_thread != NULL) { 1041 if (sc->sc_bus->lock) { 1042 mutex_enter(sc->sc_bus->lock); 1043 cv_signal(&sc->sc_bus->needs_explore_cv); 1044 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1045 sc->sc_bus->lock, hz * 60); 1046 mutex_exit(sc->sc_bus->lock); 1047 } else { 1048 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1049 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1050 } 1051 } 1052 DPRINTF(("usb_detach: event thread dead\n")); 1053 1054 if (sc->sc_bus->soft != NULL) { 1055 softint_disestablish(sc->sc_bus->soft); 1056 sc->sc_bus->soft = NULL; 1057 } 1058 1059 ue = usb_alloc_event(); 1060 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1061 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1062 1063 cv_destroy(&sc->sc_bus->needs_explore_cv); 1064 1065 return (0); 1066 } 1067 1068 #ifdef COMPAT_30 1069 Static void 1070 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1071 const struct usb_device_info *ue) 1072 { 1073 const unsigned char *p; 1074 unsigned char *q; 1075 int i, n; 1076 1077 uo->udi_bus = ue->udi_bus; 1078 uo->udi_addr = ue->udi_addr; 1079 uo->udi_cookie = ue->udi_cookie; 1080 for (i = 0, p = (const unsigned char *)ue->udi_product, 1081 q = (unsigned char *)uo->udi_product; 1082 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1083 if (*p < 0x80) 1084 q[i++] = *p; 1085 else { 1086 q[i++] = '?'; 1087 if ((*p & 0xe0) == 0xe0) 1088 p++; 1089 p++; 1090 } 1091 } 1092 q[i] = 0; 1093 1094 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1095 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1096 if (* p < 0x80) 1097 q[i++] = *p; 1098 else { 1099 q[i++] = '?'; 1100 p++; 1101 if ((*p & 0xe0) == 0xe0) 1102 p++; 1103 } 1104 } 1105 q[i] = 0; 1106 1107 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1108 1109 uo->udi_productNo = ue->udi_productNo; 1110 uo->udi_vendorNo = ue->udi_vendorNo; 1111 uo->udi_releaseNo = ue->udi_releaseNo; 1112 uo->udi_class = ue->udi_class; 1113 uo->udi_subclass = ue->udi_subclass; 1114 uo->udi_protocol = ue->udi_protocol; 1115 uo->udi_config = ue->udi_config; 1116 uo->udi_speed = ue->udi_speed; 1117 uo->udi_power = ue->udi_power; 1118 uo->udi_nports = ue->udi_nports; 1119 1120 for (n=0; n<USB_MAX_DEVNAMES; n++) 1121 memcpy(uo->udi_devnames[n], 1122 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1123 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1124 } 1125 #endif 1126
Indexes created Tue Sep 23 14:10:03 GMT 2025