usb.c revision 1.136
1 /* $NetBSD: usb.c,v 1.136 2012/11/27 04:54:58 mrg 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 1.136 2012/11/27 04:54:58 mrg Exp $"); 41 42 #include "opt_compat_netbsd.h" 43 #include "opt_usb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/device.h> 50 #include <sys/kthread.h> 51 #include <sys/proc.h> 52 #include <sys/conf.h> 53 #include <sys/fcntl.h> 54 #include <sys/poll.h> 55 #include <sys/select.h> 56 #include <sys/vnode.h> 57 #include <sys/signalvar.h> 58 #include <sys/intr.h> 59 #include <sys/module.h> 60 #include <sys/mutex.h> 61 #include <sys/bus.h> 62 #include <sys/once.h> 63 64 #include <dev/usb/usb.h> 65 #include <dev/usb/usbdi.h> 66 #include <dev/usb/usbdi_util.h> 67 #include <dev/usb/usbdivar.h> 68 #include <dev/usb/usb_verbose.h> 69 #include <dev/usb/usb_quirks.h> 70 71 #define USB_DEV_MINOR 255 72 73 #ifdef USB_DEBUG 74 #define DPRINTF(x) if (usbdebug) printf x 75 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 76 int usbdebug = 0; 77 /* 78 * 0 - do usual exploration 79 * 1 - do not use timeout exploration 80 * >1 - do no exploration 81 */ 82 int usb_noexplore = 0; 83 #else 84 #define DPRINTF(x) 85 #define DPRINTFN(n,x) 86 #define usb_noexplore 0 87 #endif 88 89 struct usb_softc { 90 #if 0 91 device_t sc_dev; /* base device */ 92 #endif 93 usbd_bus_handle sc_bus; /* USB controller */ 94 struct usbd_port sc_port; /* dummy port for root hub */ 95 96 struct lwp *sc_event_thread; 97 98 char sc_dying; 99 }; 100 101 struct usb_taskq { 102 TAILQ_HEAD(, usb_task) tasks; 103 kmutex_t lock; 104 kcondvar_t cv; 105 struct lwp *task_thread_lwp; 106 const char *name; 107 }; 108 109 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 110 111 dev_type_open(usbopen); 112 dev_type_close(usbclose); 113 dev_type_read(usbread); 114 dev_type_ioctl(usbioctl); 115 dev_type_poll(usbpoll); 116 dev_type_kqfilter(usbkqfilter); 117 118 const struct cdevsw usb_cdevsw = { 119 usbopen, usbclose, usbread, nowrite, usbioctl, 120 nostop, notty, usbpoll, nommap, usbkqfilter, D_OTHER, 121 }; 122 123 Static void usb_discover(struct usb_softc *); 124 Static void usb_create_event_thread(device_t); 125 Static void usb_event_thread(void *); 126 Static void usb_task_thread(void *); 127 128 #define USB_MAX_EVENTS 100 129 struct usb_event_q { 130 struct usb_event ue; 131 SIMPLEQ_ENTRY(usb_event_q) next; 132 }; 133 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 134 SIMPLEQ_HEAD_INITIALIZER(usb_events); 135 Static int usb_nevents = 0; 136 Static struct selinfo usb_selevent; 137 Static kmutex_t usb_event_lock; 138 Static kcondvar_t usb_event_cv; 139 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 140 Static void *usb_async_sih; 141 Static int usb_dev_open = 0; 142 Static struct usb_event *usb_alloc_event(void); 143 Static void usb_free_event(struct usb_event *); 144 Static void usb_add_event(int, struct usb_event *); 145 Static int usb_get_next_event(struct usb_event *); 146 Static void usb_async_intr(void *); 147 Static void usb_soft_intr(void *); 148 149 #ifdef COMPAT_30 150 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 151 #endif 152 153 Static const char *usbrev_str[] = USBREV_STR; 154 155 static int usb_match(device_t, cfdata_t, void *); 156 static void usb_attach(device_t, device_t, void *); 157 static int usb_detach(device_t, int); 158 static int usb_activate(device_t, enum devact); 159 static void usb_childdet(device_t, device_t); 160 static int usb_once_init(void); 161 static void usb_doattach(device_t); 162 163 extern struct cfdriver usb_cd; 164 165 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 166 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 167 DVF_DETACH_SHUTDOWN); 168 169 static const char *taskq_names[] = USB_TASKQ_NAMES; 170 171 int 172 usb_match(device_t parent, cfdata_t match, void *aux) 173 { 174 DPRINTF(("usbd_match\n")); 175 return (UMATCH_GENERIC); 176 } 177 178 void 179 usb_attach(device_t parent, device_t self, void *aux) 180 { 181 static ONCE_DECL(init_control); 182 struct usb_softc *sc = device_private(self); 183 bool mpsafe; 184 int usbrev; 185 186 sc->sc_bus = aux; 187 mpsafe = sc->sc_bus->methods->get_lock ? true : false; 188 usbrev = sc->sc_bus->usbrev; 189 190 aprint_naive("\n"); 191 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 192 switch (usbrev) { 193 case USBREV_1_0: 194 case USBREV_1_1: 195 case USBREV_2_0: 196 break; 197 default: 198 aprint_error(", not supported\n"); 199 sc->sc_dying = 1; 200 return; 201 } 202 aprint_normal("\n"); 203 204 if (mpsafe) 205 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 206 else 207 sc->sc_bus->lock = NULL; 208 209 RUN_ONCE(&init_control, usb_once_init); 210 config_interrupts(self, usb_doattach); 211 } 212 213 static int 214 usb_once_init(void) 215 { 216 struct usb_taskq *taskq; 217 int i; 218 219 selinit(&usb_selevent); 220 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 221 cv_init(&usb_event_cv, "usbrea"); 222 223 for (i = 0; i < USB_NUM_TASKQS; i++) { 224 taskq = &usb_taskq[i]; 225 226 TAILQ_INIT(&taskq->tasks); 227 /* 228 * Since USB tasks are callable from any context, we have to 229 * make this lock a spinlock. 230 */ 231 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 232 cv_init(&taskq->cv, "usbtsk"); 233 taskq->name = taskq_names[i]; 234 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 235 usb_task_thread, taskq, &taskq->task_thread_lwp, 236 "%s", taskq->name)) { 237 printf("unable to create task thread: %s\n", taskq->name); 238 panic("usb_create_event_thread task"); 239 } 240 /* 241 * XXX we should make sure these threads are alive before 242 * end up using them in usb_doattach(). 243 */ 244 } 245 return 0; 246 } 247 248 static void 249 usb_doattach(device_t self) 250 { 251 struct usb_softc *sc = device_private(self); 252 usbd_device_handle dev; 253 usbd_status err; 254 int speed; 255 struct usb_event *ue; 256 const bool mpsafe = sc->sc_bus->methods->get_lock ? true : false; 257 258 DPRINTF(("usbd_doattach\n")); 259 260 sc->sc_bus->usbctl = self; 261 sc->sc_port.power = USB_MAX_POWER; 262 263 switch (sc->sc_bus->usbrev) { 264 case USBREV_1_0: 265 case USBREV_1_1: 266 speed = USB_SPEED_FULL; 267 break; 268 case USBREV_2_0: 269 speed = USB_SPEED_HIGH; 270 break; 271 default: 272 panic("usb_doattach"); 273 } 274 275 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 276 277 ue = usb_alloc_event(); 278 ue->u.ue_ctrlr.ue_bus = device_unit(self); 279 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 280 281 /* XXX we should have our own level */ 282 sc->sc_bus->soft = softint_establish( 283 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 284 usb_soft_intr, sc->sc_bus); 285 if (sc->sc_bus->soft == NULL) { 286 aprint_error("%s: can't register softintr\n", 287 device_xname(self)); 288 sc->sc_dying = 1; 289 return; 290 } 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=%d\n", 315 device_xname(self), err); 316 sc->sc_dying = 1; 317 } 318 319 config_pending_incr(); 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(); 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 task->fun(task->arg); 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 #endif 505 int error, n, useold; 506 507 if (minor(dev) != USB_DEV_MINOR) 508 return (ENXIO); 509 510 useold = 0; 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] == 0) 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 < 1 || 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(sc->sc_bus->lock == NULL || 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 for MPSAFE controllers. 825 */ 826 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 827 sc->sc_bus->needs_explore = 0; 828 if (sc->sc_bus->lock) 829 mutex_exit(sc->sc_bus->lock); 830 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 831 if (sc->sc_bus->lock) 832 mutex_enter(sc->sc_bus->lock); 833 } 834 } 835 836 void 837 usb_needs_explore(usbd_device_handle dev) 838 { 839 DPRINTFN(2,("usb_needs_explore\n")); 840 if (dev->bus->lock) 841 mutex_enter(dev->bus->lock); 842 dev->bus->needs_explore = 1; 843 if (dev->bus->lock) { 844 cv_signal(&dev->bus->needs_explore_cv); 845 mutex_exit(dev->bus->lock); 846 } else 847 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 848 } 849 850 void 851 usb_needs_reattach(usbd_device_handle dev) 852 { 853 DPRINTFN(2,("usb_needs_reattach\n")); 854 if (dev->bus->lock) 855 mutex_enter(dev->bus->lock); 856 dev->powersrc->reattach = 1; 857 dev->bus->needs_explore = 1; 858 if (dev->bus->lock) { 859 cv_signal(&dev->bus->needs_explore_cv); 860 mutex_exit(dev->bus->lock); 861 } else 862 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 863 } 864 865 /* Called at with usb_event_lock held. */ 866 int 867 usb_get_next_event(struct usb_event *ue) 868 { 869 struct usb_event_q *ueq; 870 871 KASSERT(mutex_owned(&usb_event_lock)); 872 873 if (usb_nevents <= 0) 874 return (0); 875 ueq = SIMPLEQ_FIRST(&usb_events); 876 #ifdef DIAGNOSTIC 877 if (ueq == NULL) { 878 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 879 usb_nevents = 0; 880 return (0); 881 } 882 #endif 883 if (ue) 884 *ue = ueq->ue; 885 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 886 usb_free_event((struct usb_event *)(void *)ueq); 887 usb_nevents--; 888 return (1); 889 } 890 891 void 892 usbd_add_dev_event(int type, usbd_device_handle udev) 893 { 894 struct usb_event *ue = usb_alloc_event(); 895 896 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 897 usb_add_event(type, ue); 898 } 899 900 void 901 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 902 { 903 struct usb_event *ue = usb_alloc_event(); 904 905 ue->u.ue_driver.ue_cookie = udev->cookie; 906 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 907 sizeof ue->u.ue_driver.ue_devname); 908 usb_add_event(type, ue); 909 } 910 911 Static struct usb_event * 912 usb_alloc_event(void) 913 { 914 /* Yes, this is right; we allocate enough so that we can use it later */ 915 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 916 } 917 918 Static void 919 usb_free_event(struct usb_event *uep) 920 { 921 free(uep, M_USBDEV); 922 } 923 924 Static void 925 usb_add_event(int type, struct usb_event *uep) 926 { 927 struct usb_event_q *ueq; 928 struct timeval thetime; 929 930 microtime(&thetime); 931 /* Don't want to wait here with usb_event_lock held */ 932 ueq = (struct usb_event_q *)(void *)uep; 933 ueq->ue = *uep; 934 ueq->ue.ue_type = type; 935 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 936 937 mutex_enter(&usb_event_lock); 938 if (++usb_nevents >= USB_MAX_EVENTS) { 939 /* Too many queued events, drop an old one. */ 940 DPRINTFN(-1,("usb: event dropped\n")); 941 (void)usb_get_next_event(0); 942 } 943 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 944 cv_signal(&usb_event_cv); 945 selnotify(&usb_selevent, 0, 0); 946 if (usb_async_proc != NULL) { 947 kpreempt_disable(); 948 softint_schedule(usb_async_sih); 949 kpreempt_enable(); 950 } 951 mutex_exit(&usb_event_lock); 952 } 953 954 Static void 955 usb_async_intr(void *cookie) 956 { 957 proc_t *proc; 958 959 mutex_enter(proc_lock); 960 if ((proc = usb_async_proc) != NULL) 961 psignal(proc, SIGIO); 962 mutex_exit(proc_lock); 963 } 964 965 Static void 966 usb_soft_intr(void *arg) 967 { 968 usbd_bus_handle bus = arg; 969 970 if (bus->lock) 971 mutex_enter(bus->lock); 972 (*bus->methods->soft_intr)(bus); 973 if (bus->lock) 974 mutex_exit(bus->lock); 975 } 976 977 void 978 usb_schedsoftintr(usbd_bus_handle bus) 979 { 980 981 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 982 983 if (bus->use_polling) { 984 bus->methods->soft_intr(bus); 985 } else { 986 kpreempt_disable(); 987 softint_schedule(bus->soft); 988 kpreempt_enable(); 989 } 990 } 991 992 int 993 usb_activate(device_t self, enum devact act) 994 { 995 struct usb_softc *sc = device_private(self); 996 997 switch (act) { 998 case DVACT_DEACTIVATE: 999 sc->sc_dying = 1; 1000 return 0; 1001 default: 1002 return EOPNOTSUPP; 1003 } 1004 } 1005 1006 void 1007 usb_childdet(device_t self, device_t child) 1008 { 1009 int i; 1010 struct usb_softc *sc = device_private(self); 1011 struct usbd_device *dev; 1012 1013 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1014 return; 1015 1016 for (i = 0; i < dev->subdevlen; i++) 1017 if (dev->subdevs[i] == child) 1018 dev->subdevs[i] = NULL; 1019 } 1020 1021 int 1022 usb_detach(device_t self, int flags) 1023 { 1024 struct usb_softc *sc = device_private(self); 1025 struct usb_event *ue; 1026 int rc; 1027 1028 DPRINTF(("usb_detach: start\n")); 1029 1030 /* Make all devices disconnect. */ 1031 if (sc->sc_port.device != NULL && 1032 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1033 return rc; 1034 1035 pmf_device_deregister(self); 1036 /* Kill off event thread. */ 1037 sc->sc_dying = 1; 1038 while (sc->sc_event_thread != NULL) { 1039 if (sc->sc_bus->lock) { 1040 mutex_enter(sc->sc_bus->lock); 1041 cv_signal(&sc->sc_bus->needs_explore_cv); 1042 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1043 sc->sc_bus->lock, hz * 60); 1044 mutex_exit(sc->sc_bus->lock); 1045 } else { 1046 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1047 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1048 } 1049 } 1050 DPRINTF(("usb_detach: event thread dead\n")); 1051 1052 if (sc->sc_bus->soft != NULL) { 1053 softint_disestablish(sc->sc_bus->soft); 1054 sc->sc_bus->soft = NULL; 1055 } 1056 1057 ue = usb_alloc_event(); 1058 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1059 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1060 1061 cv_destroy(&sc->sc_bus->needs_explore_cv); 1062 1063 return (0); 1064 } 1065 1066 #ifdef COMPAT_30 1067 Static void 1068 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1069 const struct usb_device_info *ue) 1070 { 1071 const unsigned char *p; 1072 unsigned char *q; 1073 int i, n; 1074 1075 uo->udi_bus = ue->udi_bus; 1076 uo->udi_addr = ue->udi_addr; 1077 uo->udi_cookie = ue->udi_cookie; 1078 for (i = 0, p = (const unsigned char *)ue->udi_product, 1079 q = (unsigned char *)uo->udi_product; 1080 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1081 if (*p < 0x80) 1082 q[i++] = *p; 1083 else { 1084 q[i++] = '?'; 1085 if ((*p & 0xe0) == 0xe0) 1086 p++; 1087 p++; 1088 } 1089 } 1090 q[i] = 0; 1091 1092 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1093 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1094 if (* p < 0x80) 1095 q[i++] = *p; 1096 else { 1097 q[i++] = '?'; 1098 p++; 1099 if ((*p & 0xe0) == 0xe0) 1100 p++; 1101 } 1102 } 1103 q[i] = 0; 1104 1105 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1106 1107 uo->udi_productNo = ue->udi_productNo; 1108 uo->udi_vendorNo = ue->udi_vendorNo; 1109 uo->udi_releaseNo = ue->udi_releaseNo; 1110 uo->udi_class = ue->udi_class; 1111 uo->udi_subclass = ue->udi_subclass; 1112 uo->udi_protocol = ue->udi_protocol; 1113 uo->udi_config = ue->udi_config; 1114 uo->udi_speed = ue->udi_speed; 1115 uo->udi_power = ue->udi_power; 1116 uo->udi_nports = ue->udi_nports; 1117 1118 for (n=0; n<USB_MAX_DEVNAMES; n++) 1119 memcpy(uo->udi_devnames[n], 1120 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1121 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1122 } 1123 #endif 1124
Indexes created Tue Sep 23 14:10:03 GMT 2025