usb.c revision 1.145
1 /* $NetBSD: usb.c,v 1.145 2013/10/12 16:49:01 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 1.145 2013/10/12 16:49:01 christos 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 /* XXX we should have our own level */ 206 sc->sc_bus->soft = softint_establish( 207 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 208 usb_soft_intr, sc->sc_bus); 209 if (sc->sc_bus->soft == NULL) { 210 aprint_error("%s: can't register softintr\n", 211 device_xname(self)); 212 sc->sc_dying = 1; 213 return; 214 } 215 216 if (mpsafe) 217 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 218 else 219 sc->sc_bus->lock = NULL; 220 221 RUN_ONCE(&init_control, usb_once_init); 222 config_interrupts(self, usb_doattach); 223 } 224 225 static int 226 usb_once_init(void) 227 { 228 struct usb_taskq *taskq; 229 int i; 230 231 selinit(&usb_selevent); 232 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 233 cv_init(&usb_event_cv, "usbrea"); 234 235 for (i = 0; i < USB_NUM_TASKQS; i++) { 236 taskq = &usb_taskq[i]; 237 238 TAILQ_INIT(&taskq->tasks); 239 /* 240 * Since USB task methods usb_{add,rem}_task are callable 241 * from any context, we have to make this lock a spinlock. 242 */ 243 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 244 cv_init(&taskq->cv, "usbtsk"); 245 taskq->name = taskq_names[i]; 246 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 247 usb_task_thread, taskq, &taskq->task_thread_lwp, 248 "%s", taskq->name)) { 249 printf("unable to create task thread: %s\n", taskq->name); 250 panic("usb_create_event_thread task"); 251 } 252 /* 253 * XXX we should make sure these threads are alive before 254 * end up using them in usb_doattach(). 255 */ 256 } 257 return 0; 258 } 259 260 static void 261 usb_doattach(device_t self) 262 { 263 struct usb_softc *sc = device_private(self); 264 usbd_device_handle dev; 265 usbd_status err; 266 int speed; 267 struct usb_event *ue; 268 269 DPRINTF(("usbd_doattach\n")); 270 271 sc->sc_bus->usbctl = self; 272 sc->sc_port.power = USB_MAX_POWER; 273 274 switch (sc->sc_bus->usbrev) { 275 case USBREV_1_0: 276 case USBREV_1_1: 277 speed = USB_SPEED_FULL; 278 break; 279 case USBREV_2_0: 280 speed = USB_SPEED_HIGH; 281 break; 282 default: 283 panic("usb_doattach"); 284 } 285 286 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 287 288 ue = usb_alloc_event(); 289 ue->u.ue_ctrlr.ue_bus = device_unit(self); 290 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 291 292 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 293 &sc->sc_port); 294 if (!err) { 295 dev = sc->sc_port.device; 296 if (dev->hub == NULL) { 297 sc->sc_dying = 1; 298 aprint_error("%s: root device is not a hub\n", 299 device_xname(self)); 300 return; 301 } 302 sc->sc_bus->root_hub = dev; 303 usb_create_event_thread(self); 304 #if 1 305 /* 306 * Turning this code off will delay attachment of USB devices 307 * until the USB event thread is running, which means that 308 * the keyboard will not work until after cold boot. 309 */ 310 if (cold && (device_cfdata(self)->cf_flags & 1)) 311 dev->hub->explore(sc->sc_bus->root_hub); 312 #endif 313 } else { 314 aprint_error("%s: root hub problem, error=%s\n", 315 device_xname(self), usbd_errstr(err)); 316 sc->sc_dying = 1; 317 } 318 319 config_pending_incr(self); 320 321 if (!pmf_device_register(self, NULL, NULL)) 322 aprint_error_dev(self, "couldn't establish power handler\n"); 323 324 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 325 usb_async_intr, NULL); 326 327 return; 328 } 329 330 void 331 usb_create_event_thread(device_t self) 332 { 333 struct usb_softc *sc = device_private(self); 334 335 if (kthread_create(PRI_NONE, 336 sc->sc_bus->lock ? KTHREAD_MPSAFE : 0, NULL, 337 usb_event_thread, sc, &sc->sc_event_thread, 338 "%s", device_xname(self))) { 339 printf("%s: unable to create event thread for\n", 340 device_xname(self)); 341 panic("usb_create_event_thread"); 342 } 343 } 344 345 /* 346 * Add a task to be performed by the task thread. This function can be 347 * called from any context and the task will be executed in a process 348 * context ASAP. 349 */ 350 void 351 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 352 { 353 struct usb_taskq *taskq; 354 355 taskq = &usb_taskq[queue]; 356 mutex_enter(&taskq->lock); 357 if (task->queue == -1) { 358 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 359 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 360 task->queue = queue; 361 } else { 362 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 363 } 364 cv_signal(&taskq->cv); 365 mutex_exit(&taskq->lock); 366 } 367 368 void 369 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 370 { 371 372 if (task->queue != -1) { 373 struct usb_taskq *taskq = &usb_taskq[task->queue]; 374 mutex_enter(&taskq->lock); 375 TAILQ_REMOVE(&taskq->tasks, task, next); 376 task->queue = -1; 377 mutex_exit(&taskq->lock); 378 } 379 } 380 381 void 382 usb_event_thread(void *arg) 383 { 384 struct usb_softc *sc = arg; 385 386 DPRINTF(("usb_event_thread: start\n")); 387 388 /* 389 * In case this controller is a companion controller to an 390 * EHCI controller we need to wait until the EHCI controller 391 * has grabbed the port. 392 * XXX It would be nicer to do this with a tsleep(), but I don't 393 * know how to synchronize the creation of the threads so it 394 * will work. 395 */ 396 usb_delay_ms(sc->sc_bus, 500); 397 398 /* Make sure first discover does something. */ 399 if (sc->sc_bus->lock) 400 mutex_enter(sc->sc_bus->lock); 401 sc->sc_bus->needs_explore = 1; 402 usb_discover(sc); 403 if (sc->sc_bus->lock) 404 mutex_exit(sc->sc_bus->lock); 405 config_pending_decr(sc->sc_bus->usbctl); 406 407 if (sc->sc_bus->lock) 408 mutex_enter(sc->sc_bus->lock); 409 while (!sc->sc_dying) { 410 if (usb_noexplore < 2) 411 usb_discover(sc); 412 413 if (sc->sc_bus->lock) 414 cv_timedwait(&sc->sc_bus->needs_explore_cv, 415 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 416 else 417 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 418 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 419 DPRINTFN(2,("usb_event_thread: woke up\n")); 420 } 421 sc->sc_event_thread = NULL; 422 423 /* In case parent is waiting for us to exit. */ 424 if (sc->sc_bus->lock) { 425 cv_signal(&sc->sc_bus->needs_explore_cv); 426 mutex_exit(sc->sc_bus->lock); 427 } else 428 wakeup(sc); /* XXXSMP ok */ 429 430 DPRINTF(("usb_event_thread: exit\n")); 431 kthread_exit(0); 432 } 433 434 void 435 usb_task_thread(void *arg) 436 { 437 struct usb_task *task; 438 struct usb_taskq *taskq; 439 440 taskq = arg; 441 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 442 443 mutex_enter(&taskq->lock); 444 for (;;) { 445 task = TAILQ_FIRST(&taskq->tasks); 446 if (task == NULL) { 447 cv_wait(&taskq->cv, &taskq->lock); 448 task = TAILQ_FIRST(&taskq->tasks); 449 } 450 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 451 if (task != NULL) { 452 TAILQ_REMOVE(&taskq->tasks, task, next); 453 task->queue = -1; 454 mutex_exit(&taskq->lock); 455 456 if (!(task->flags & USB_TASKQ_MPSAFE)) 457 KERNEL_LOCK(1, curlwp); 458 task->fun(task->arg); 459 if (!(task->flags & USB_TASKQ_MPSAFE)) 460 KERNEL_UNLOCK_ONE(curlwp); 461 462 mutex_enter(&taskq->lock); 463 } 464 } 465 mutex_exit(&taskq->lock); 466 } 467 468 int 469 usbctlprint(void *aux, const char *pnp) 470 { 471 /* only "usb"es can attach to host controllers */ 472 if (pnp) 473 aprint_normal("usb at %s", pnp); 474 475 return (UNCONF); 476 } 477 478 int 479 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 480 { 481 int unit = minor(dev); 482 struct usb_softc *sc; 483 484 if (unit == USB_DEV_MINOR) { 485 if (usb_dev_open) 486 return (EBUSY); 487 usb_dev_open = 1; 488 mutex_enter(proc_lock); 489 usb_async_proc = 0; 490 mutex_exit(proc_lock); 491 return (0); 492 } 493 494 sc = device_lookup_private(&usb_cd, unit); 495 if (!sc) 496 return (ENXIO); 497 498 if (sc->sc_dying) 499 return (EIO); 500 501 return (0); 502 } 503 504 int 505 usbread(dev_t dev, struct uio *uio, int flag) 506 { 507 struct usb_event *ue; 508 #ifdef COMPAT_30 509 struct usb_event_old *ueo = NULL; /* XXXGCC */ 510 #endif 511 int error, n, useold; 512 513 if (minor(dev) != USB_DEV_MINOR) 514 return (ENXIO); 515 516 useold = 0; 517 switch (uio->uio_resid) { 518 #ifdef COMPAT_30 519 case sizeof(struct usb_event_old): 520 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 521 M_WAITOK|M_ZERO); 522 useold = 1; 523 /* FALLTHRU */ 524 #endif 525 case sizeof(struct usb_event): 526 ue = usb_alloc_event(); 527 break; 528 default: 529 return (EINVAL); 530 } 531 532 error = 0; 533 mutex_enter(&usb_event_lock); 534 for (;;) { 535 n = usb_get_next_event(ue); 536 if (n != 0) 537 break; 538 if (flag & IO_NDELAY) { 539 error = EWOULDBLOCK; 540 break; 541 } 542 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 543 if (error) 544 break; 545 } 546 mutex_exit(&usb_event_lock); 547 if (!error) { 548 #ifdef COMPAT_30 549 if (useold) { /* copy fields to old struct */ 550 ueo->ue_type = ue->ue_type; 551 memcpy(&ueo->ue_time, &ue->ue_time, 552 sizeof(struct timespec)); 553 switch (ue->ue_type) { 554 case USB_EVENT_DEVICE_ATTACH: 555 case USB_EVENT_DEVICE_DETACH: 556 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 557 break; 558 559 case USB_EVENT_CTRLR_ATTACH: 560 case USB_EVENT_CTRLR_DETACH: 561 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 562 break; 563 564 case USB_EVENT_DRIVER_ATTACH: 565 case USB_EVENT_DRIVER_DETACH: 566 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 567 memcpy(ueo->u.ue_driver.ue_devname, 568 ue->u.ue_driver.ue_devname, 569 sizeof(ue->u.ue_driver.ue_devname)); 570 break; 571 default: 572 ; 573 } 574 575 error = uiomove((void *)ueo, sizeof *ueo, uio); 576 } else 577 #endif 578 error = uiomove((void *)ue, sizeof *ue, uio); 579 } 580 usb_free_event(ue); 581 #ifdef COMPAT_30 582 if (useold) 583 free(ueo, M_USBDEV); 584 #endif 585 586 return (error); 587 } 588 589 int 590 usbclose(dev_t dev, int flag, int mode, 591 struct lwp *l) 592 { 593 int unit = minor(dev); 594 595 if (unit == USB_DEV_MINOR) { 596 mutex_enter(proc_lock); 597 usb_async_proc = 0; 598 mutex_exit(proc_lock); 599 usb_dev_open = 0; 600 } 601 602 return (0); 603 } 604 605 int 606 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 607 { 608 struct usb_softc *sc; 609 int unit = minor(devt); 610 611 if (unit == USB_DEV_MINOR) { 612 switch (cmd) { 613 case FIONBIO: 614 /* All handled in the upper FS layer. */ 615 return (0); 616 617 case FIOASYNC: 618 mutex_enter(proc_lock); 619 if (*(int *)data) 620 usb_async_proc = l->l_proc; 621 else 622 usb_async_proc = 0; 623 mutex_exit(proc_lock); 624 return (0); 625 626 default: 627 return (EINVAL); 628 } 629 } 630 631 sc = device_lookup_private(&usb_cd, unit); 632 633 if (sc->sc_dying) 634 return (EIO); 635 636 switch (cmd) { 637 #ifdef USB_DEBUG 638 case USB_SETDEBUG: 639 if (!(flag & FWRITE)) 640 return (EBADF); 641 usbdebug = ((*(int *)data) & 0x000000ff); 642 break; 643 #endif /* USB_DEBUG */ 644 case USB_REQUEST: 645 { 646 struct usb_ctl_request *ur = (void *)data; 647 int len = UGETW(ur->ucr_request.wLength); 648 struct iovec iov; 649 struct uio uio; 650 void *ptr = 0; 651 int addr = ur->ucr_addr; 652 usbd_status err; 653 int error = 0; 654 655 if (!(flag & FWRITE)) 656 return (EBADF); 657 658 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 659 if (len < 0 || len > 32768) 660 return (EINVAL); 661 if (addr < 0 || addr >= USB_MAX_DEVICES || 662 sc->sc_bus->devices[addr] == NULL) 663 return (EINVAL); 664 if (len != 0) { 665 iov.iov_base = (void *)ur->ucr_data; 666 iov.iov_len = len; 667 uio.uio_iov = &iov; 668 uio.uio_iovcnt = 1; 669 uio.uio_resid = len; 670 uio.uio_offset = 0; 671 uio.uio_rw = 672 ur->ucr_request.bmRequestType & UT_READ ? 673 UIO_READ : UIO_WRITE; 674 uio.uio_vmspace = l->l_proc->p_vmspace; 675 ptr = malloc(len, M_TEMP, M_WAITOK); 676 if (uio.uio_rw == UIO_WRITE) { 677 error = uiomove(ptr, len, &uio); 678 if (error) 679 goto ret; 680 } 681 } 682 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 683 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 684 USBD_DEFAULT_TIMEOUT); 685 if (err) { 686 error = EIO; 687 goto ret; 688 } 689 if (len > ur->ucr_actlen) 690 len = ur->ucr_actlen; 691 if (len != 0) { 692 if (uio.uio_rw == UIO_READ) { 693 error = uiomove(ptr, len, &uio); 694 if (error) 695 goto ret; 696 } 697 } 698 ret: 699 if (ptr) 700 free(ptr, M_TEMP); 701 return (error); 702 } 703 704 case USB_DEVICEINFO: 705 { 706 usbd_device_handle dev; 707 struct usb_device_info *di = (void *)data; 708 int addr = di->udi_addr; 709 710 if (addr < 0 || addr >= USB_MAX_DEVICES) 711 return EINVAL; 712 if ((dev = sc->sc_bus->devices[addr]) == NULL) 713 return ENXIO; 714 usbd_fill_deviceinfo(dev, di, 1); 715 break; 716 } 717 718 #ifdef COMPAT_30 719 case USB_DEVICEINFO_OLD: 720 { 721 usbd_device_handle dev; 722 struct usb_device_info_old *di = (void *)data; 723 int addr = di->udi_addr; 724 725 if (addr < 1 || addr >= USB_MAX_DEVICES) 726 return EINVAL; 727 if ((dev = sc->sc_bus->devices[addr]) == NULL) 728 return ENXIO; 729 usbd_fill_deviceinfo_old(dev, di, 1); 730 break; 731 } 732 #endif 733 734 case USB_DEVICESTATS: 735 *(struct usb_device_stats *)data = sc->sc_bus->stats; 736 break; 737 738 default: 739 return (EINVAL); 740 } 741 return (0); 742 } 743 744 int 745 usbpoll(dev_t dev, int events, struct lwp *l) 746 { 747 int revents, mask; 748 749 if (minor(dev) == USB_DEV_MINOR) { 750 revents = 0; 751 mask = POLLIN | POLLRDNORM; 752 753 mutex_enter(&usb_event_lock); 754 if (events & mask && usb_nevents > 0) 755 revents |= events & mask; 756 if (revents == 0 && events & mask) 757 selrecord(l, &usb_selevent); 758 mutex_exit(&usb_event_lock); 759 760 return (revents); 761 } else { 762 return (0); 763 } 764 } 765 766 static void 767 filt_usbrdetach(struct knote *kn) 768 { 769 770 mutex_enter(&usb_event_lock); 771 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 772 mutex_exit(&usb_event_lock); 773 } 774 775 static int 776 filt_usbread(struct knote *kn, long hint) 777 { 778 779 if (usb_nevents == 0) 780 return (0); 781 782 kn->kn_data = sizeof(struct usb_event); 783 return (1); 784 } 785 786 static const struct filterops usbread_filtops = 787 { 1, NULL, filt_usbrdetach, filt_usbread }; 788 789 int 790 usbkqfilter(dev_t dev, struct knote *kn) 791 { 792 struct klist *klist; 793 794 switch (kn->kn_filter) { 795 case EVFILT_READ: 796 if (minor(dev) != USB_DEV_MINOR) 797 return (1); 798 klist = &usb_selevent.sel_klist; 799 kn->kn_fop = &usbread_filtops; 800 break; 801 802 default: 803 return (EINVAL); 804 } 805 806 kn->kn_hook = NULL; 807 808 mutex_enter(&usb_event_lock); 809 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 810 mutex_exit(&usb_event_lock); 811 812 return (0); 813 } 814 815 /* Explore device tree from the root. */ 816 Static void 817 usb_discover(struct usb_softc *sc) 818 { 819 820 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 821 822 DPRINTFN(2,("usb_discover\n")); 823 if (usb_noexplore > 1) 824 return; 825 /* 826 * We need mutual exclusion while traversing the device tree, 827 * but this is guaranteed since this function is only called 828 * from the event thread for the controller. 829 * 830 * Also, we now have sc_bus->lock held for MPSAFE controllers. 831 */ 832 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 833 sc->sc_bus->needs_explore = 0; 834 if (sc->sc_bus->lock) 835 mutex_exit(sc->sc_bus->lock); 836 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 837 if (sc->sc_bus->lock) 838 mutex_enter(sc->sc_bus->lock); 839 } 840 } 841 842 void 843 usb_needs_explore(usbd_device_handle dev) 844 { 845 DPRINTFN(2,("usb_needs_explore\n")); 846 if (dev->bus->lock) 847 mutex_enter(dev->bus->lock); 848 dev->bus->needs_explore = 1; 849 if (dev->bus->lock) { 850 cv_signal(&dev->bus->needs_explore_cv); 851 mutex_exit(dev->bus->lock); 852 } else 853 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 854 } 855 856 void 857 usb_needs_reattach(usbd_device_handle dev) 858 { 859 DPRINTFN(2,("usb_needs_reattach\n")); 860 if (dev->bus->lock) 861 mutex_enter(dev->bus->lock); 862 dev->powersrc->reattach = 1; 863 dev->bus->needs_explore = 1; 864 if (dev->bus->lock) { 865 cv_signal(&dev->bus->needs_explore_cv); 866 mutex_exit(dev->bus->lock); 867 } else 868 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 869 } 870 871 /* Called at with usb_event_lock held. */ 872 int 873 usb_get_next_event(struct usb_event *ue) 874 { 875 struct usb_event_q *ueq; 876 877 KASSERT(mutex_owned(&usb_event_lock)); 878 879 if (usb_nevents <= 0) 880 return (0); 881 ueq = SIMPLEQ_FIRST(&usb_events); 882 #ifdef DIAGNOSTIC 883 if (ueq == NULL) { 884 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 885 usb_nevents = 0; 886 return (0); 887 } 888 #endif 889 if (ue) 890 *ue = ueq->ue; 891 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 892 usb_free_event((struct usb_event *)(void *)ueq); 893 usb_nevents--; 894 return (1); 895 } 896 897 void 898 usbd_add_dev_event(int type, usbd_device_handle udev) 899 { 900 struct usb_event *ue = usb_alloc_event(); 901 902 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 903 usb_add_event(type, ue); 904 } 905 906 void 907 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 908 { 909 struct usb_event *ue = usb_alloc_event(); 910 911 ue->u.ue_driver.ue_cookie = udev->cookie; 912 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 913 sizeof ue->u.ue_driver.ue_devname); 914 usb_add_event(type, ue); 915 } 916 917 Static struct usb_event * 918 usb_alloc_event(void) 919 { 920 /* Yes, this is right; we allocate enough so that we can use it later */ 921 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 922 } 923 924 Static void 925 usb_free_event(struct usb_event *uep) 926 { 927 free(uep, M_USBDEV); 928 } 929 930 Static void 931 usb_add_event(int type, struct usb_event *uep) 932 { 933 struct usb_event_q *ueq; 934 struct timeval thetime; 935 936 microtime(&thetime); 937 /* Don't want to wait here with usb_event_lock held */ 938 ueq = (struct usb_event_q *)(void *)uep; 939 ueq->ue = *uep; 940 ueq->ue.ue_type = type; 941 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 942 943 mutex_enter(&usb_event_lock); 944 if (++usb_nevents >= USB_MAX_EVENTS) { 945 /* Too many queued events, drop an old one. */ 946 DPRINTFN(-1,("usb: event dropped\n")); 947 (void)usb_get_next_event(0); 948 } 949 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 950 cv_signal(&usb_event_cv); 951 selnotify(&usb_selevent, 0, 0); 952 if (usb_async_proc != NULL) { 953 kpreempt_disable(); 954 softint_schedule(usb_async_sih); 955 kpreempt_enable(); 956 } 957 mutex_exit(&usb_event_lock); 958 } 959 960 Static void 961 usb_async_intr(void *cookie) 962 { 963 proc_t *proc; 964 965 mutex_enter(proc_lock); 966 if ((proc = usb_async_proc) != NULL) 967 psignal(proc, SIGIO); 968 mutex_exit(proc_lock); 969 } 970 971 Static void 972 usb_soft_intr(void *arg) 973 { 974 usbd_bus_handle bus = arg; 975 976 if (bus->lock) 977 mutex_enter(bus->lock); 978 (*bus->methods->soft_intr)(bus); 979 if (bus->lock) 980 mutex_exit(bus->lock); 981 } 982 983 void 984 usb_schedsoftintr(usbd_bus_handle bus) 985 { 986 987 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 988 989 if (bus->use_polling) { 990 bus->methods->soft_intr(bus); 991 } else { 992 kpreempt_disable(); 993 softint_schedule(bus->soft); 994 kpreempt_enable(); 995 } 996 } 997 998 int 999 usb_activate(device_t self, enum devact act) 1000 { 1001 struct usb_softc *sc = device_private(self); 1002 1003 switch (act) { 1004 case DVACT_DEACTIVATE: 1005 sc->sc_dying = 1; 1006 return 0; 1007 default: 1008 return EOPNOTSUPP; 1009 } 1010 } 1011 1012 void 1013 usb_childdet(device_t self, device_t child) 1014 { 1015 int i; 1016 struct usb_softc *sc = device_private(self); 1017 struct usbd_device *dev; 1018 1019 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1020 return; 1021 1022 for (i = 0; i < dev->subdevlen; i++) 1023 if (dev->subdevs[i] == child) 1024 dev->subdevs[i] = NULL; 1025 } 1026 1027 int 1028 usb_detach(device_t self, int flags) 1029 { 1030 struct usb_softc *sc = device_private(self); 1031 struct usb_event *ue; 1032 int rc; 1033 1034 DPRINTF(("usb_detach: start\n")); 1035 1036 /* Make all devices disconnect. */ 1037 if (sc->sc_port.device != NULL && 1038 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1039 return rc; 1040 1041 pmf_device_deregister(self); 1042 /* Kill off event thread. */ 1043 sc->sc_dying = 1; 1044 while (sc->sc_event_thread != NULL) { 1045 if (sc->sc_bus->lock) { 1046 mutex_enter(sc->sc_bus->lock); 1047 cv_signal(&sc->sc_bus->needs_explore_cv); 1048 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1049 sc->sc_bus->lock, hz * 60); 1050 mutex_exit(sc->sc_bus->lock); 1051 } else { 1052 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1053 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1054 } 1055 } 1056 DPRINTF(("usb_detach: event thread dead\n")); 1057 1058 if (sc->sc_bus->soft != NULL) { 1059 softint_disestablish(sc->sc_bus->soft); 1060 sc->sc_bus->soft = NULL; 1061 } 1062 1063 ue = usb_alloc_event(); 1064 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1065 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1066 1067 cv_destroy(&sc->sc_bus->needs_explore_cv); 1068 1069 return (0); 1070 } 1071 1072 #ifdef COMPAT_30 1073 Static void 1074 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1075 const struct usb_device_info *ue) 1076 { 1077 const unsigned char *p; 1078 unsigned char *q; 1079 int i, n; 1080 1081 uo->udi_bus = ue->udi_bus; 1082 uo->udi_addr = ue->udi_addr; 1083 uo->udi_cookie = ue->udi_cookie; 1084 for (i = 0, p = (const unsigned char *)ue->udi_product, 1085 q = (unsigned char *)uo->udi_product; 1086 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1087 if (*p < 0x80) 1088 q[i++] = *p; 1089 else { 1090 q[i++] = '?'; 1091 if ((*p & 0xe0) == 0xe0) 1092 p++; 1093 p++; 1094 } 1095 } 1096 q[i] = 0; 1097 1098 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1099 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1100 if (* p < 0x80) 1101 q[i++] = *p; 1102 else { 1103 q[i++] = '?'; 1104 p++; 1105 if ((*p & 0xe0) == 0xe0) 1106 p++; 1107 } 1108 } 1109 q[i] = 0; 1110 1111 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1112 1113 uo->udi_productNo = ue->udi_productNo; 1114 uo->udi_vendorNo = ue->udi_vendorNo; 1115 uo->udi_releaseNo = ue->udi_releaseNo; 1116 uo->udi_class = ue->udi_class; 1117 uo->udi_subclass = ue->udi_subclass; 1118 uo->udi_protocol = ue->udi_protocol; 1119 uo->udi_config = ue->udi_config; 1120 uo->udi_speed = ue->udi_speed; 1121 uo->udi_power = ue->udi_power; 1122 uo->udi_nports = ue->udi_nports; 1123 1124 for (n=0; n<USB_MAX_DEVNAMES; n++) 1125 memcpy(uo->udi_devnames[n], 1126 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1127 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1128 } 1129 #endif 1130
Indexes created Tue Sep 23 02:09:52 GMT 2025