usb.c revision 1.132
1 /* $NetBSD: usb.c,v 1.132 2012/07/17 10:33:46 cegger 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 1.132 2012/07/17 10:33:46 cegger 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 int taskcreated; /* task thread exists. */ 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 int 171 usb_match(device_t parent, cfdata_t match, void *aux) 172 { 173 DPRINTF(("usbd_match\n")); 174 return (UMATCH_GENERIC); 175 } 176 177 void 178 usb_attach(device_t parent, device_t self, void *aux) 179 { 180 static ONCE_DECL(init_control); 181 struct usb_softc *sc = device_private(self); 182 int usbrev; 183 184 sc->sc_bus = aux; 185 usbrev = sc->sc_bus->usbrev; 186 187 aprint_naive("\n"); 188 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 189 switch (usbrev) { 190 case USBREV_1_0: 191 case USBREV_1_1: 192 case USBREV_2_0: 193 break; 194 default: 195 aprint_error(", not supported\n"); 196 sc->sc_dying = 1; 197 return; 198 } 199 aprint_normal("\n"); 200 201 RUN_ONCE(&init_control, usb_once_init); 202 config_interrupts(self, usb_doattach); 203 } 204 205 static int 206 usb_once_init(void) 207 { 208 209 selinit(&usb_selevent); 210 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 211 cv_init(&usb_event_cv, "usbrea"); 212 return 0; 213 } 214 215 static void 216 usb_doattach(device_t self) 217 { 218 struct usb_softc *sc = device_private(self); 219 usbd_device_handle dev; 220 usbd_status err; 221 int speed; 222 struct usb_event *ue; 223 bool mpsafe = sc->sc_bus->methods->get_lock ? true : false; 224 225 DPRINTF(("usbd_doattach\n")); 226 227 sc->sc_bus->usbctl = self; 228 sc->sc_port.power = USB_MAX_POWER; 229 230 switch (sc->sc_bus->usbrev) { 231 case USBREV_1_0: 232 case USBREV_1_1: 233 speed = USB_SPEED_FULL; 234 break; 235 case USBREV_2_0: 236 speed = USB_SPEED_HIGH; 237 break; 238 default: 239 panic("usb_doattach"); 240 } 241 242 if (mpsafe) { 243 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 244 } else { 245 sc->sc_bus->lock = NULL; 246 } 247 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 248 249 ue = usb_alloc_event(); 250 ue->u.ue_ctrlr.ue_bus = device_unit(self); 251 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 252 253 /* XXX we should have our own level */ 254 sc->sc_bus->soft = softint_establish( 255 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 256 usb_soft_intr, sc->sc_bus); 257 if (sc->sc_bus->soft == NULL) { 258 aprint_error("%s: can't register softintr\n", 259 device_xname(self)); 260 sc->sc_dying = 1; 261 return; 262 } 263 264 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 265 &sc->sc_port); 266 if (!err) { 267 dev = sc->sc_port.device; 268 if (dev->hub == NULL) { 269 sc->sc_dying = 1; 270 aprint_error("%s: root device is not a hub\n", 271 device_xname(self)); 272 return; 273 } 274 sc->sc_bus->root_hub = dev; 275 #if 1 276 /* 277 * Turning this code off will delay attachment of USB devices 278 * until the USB event thread is running, which means that 279 * the keyboard will not work until after cold boot. 280 */ 281 if (cold && (device_cfdata(self)->cf_flags & 1)) 282 dev->hub->explore(sc->sc_bus->root_hub); 283 #endif 284 } else { 285 aprint_error("%s: root hub problem, error=%d\n", 286 device_xname(self), err); 287 sc->sc_dying = 1; 288 } 289 290 config_pending_incr(); 291 usb_create_event_thread(self); 292 293 if (!pmf_device_register(self, NULL, NULL)) 294 aprint_error_dev(self, "couldn't establish power handler\n"); 295 296 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 297 usb_async_intr, NULL); 298 299 return; 300 } 301 302 static const char *taskq_names[] = USB_TASKQ_NAMES; 303 304 void 305 usb_create_event_thread(device_t self) 306 { 307 struct usb_softc *sc = device_private(self); 308 struct usb_taskq *taskq; 309 int i; 310 311 if (kthread_create(PRI_NONE, 312 sc->sc_bus->lock ? KTHREAD_MPSAFE : 0, NULL, 313 usb_event_thread, sc, &sc->sc_event_thread, 314 "%s", device_xname(self))) { 315 printf("%s: unable to create event thread for\n", 316 device_xname(self)); 317 panic("usb_create_event_thread"); 318 } 319 for (i = 0; i < USB_NUM_TASKQS; i++) { 320 taskq = &usb_taskq[i]; 321 322 if (taskq->taskcreated) 323 continue; 324 325 TAILQ_INIT(&taskq->tasks); 326 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_NONE); 327 cv_init(&taskq->cv, "usbtsk"); 328 taskq->taskcreated = 1; 329 taskq->name = taskq_names[i]; 330 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 331 usb_task_thread, taskq, &taskq->task_thread_lwp, 332 "%s", taskq->name)) { 333 printf("unable to create task thread: %s\n", taskq->name); 334 panic("usb_create_event_thread task"); 335 } 336 } 337 } 338 339 /* 340 * Add a task to be performed by the task thread. This function can be 341 * called from any context and the task will be executed in a process 342 * context ASAP. 343 */ 344 void 345 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 346 { 347 struct usb_taskq *taskq; 348 349 taskq = &usb_taskq[queue]; 350 mutex_enter(&taskq->lock); 351 if (task->queue == -1) { 352 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 353 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 354 task->queue = queue; 355 } else { 356 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 357 } 358 cv_signal(&taskq->cv); 359 mutex_exit(&taskq->lock); 360 } 361 362 void 363 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 364 { 365 struct usb_taskq *taskq; 366 367 taskq = &usb_taskq[task->queue]; 368 mutex_enter(&taskq->lock); 369 if (task->queue != -1) { 370 TAILQ_REMOVE(&taskq->tasks, task, next); 371 task->queue = -1; 372 } 373 mutex_exit(&taskq->lock); 374 } 375 376 void 377 usb_event_thread(void *arg) 378 { 379 struct usb_softc *sc = arg; 380 381 DPRINTF(("usb_event_thread: start\n")); 382 383 /* 384 * In case this controller is a companion controller to an 385 * EHCI controller we need to wait until the EHCI controller 386 * has grabbed the port. 387 * XXX It would be nicer to do this with a tsleep(), but I don't 388 * know how to synchronize the creation of the threads so it 389 * will work. 390 */ 391 usb_delay_ms(sc->sc_bus, 500); 392 393 /* Make sure first discover does something. */ 394 if (sc->sc_bus->lock) 395 mutex_enter(sc->sc_bus->lock); 396 sc->sc_bus->needs_explore = 1; 397 usb_discover(sc); 398 if (sc->sc_bus->lock) 399 mutex_exit(sc->sc_bus->lock); 400 config_pending_decr(); 401 402 if (sc->sc_bus->lock) 403 mutex_enter(sc->sc_bus->lock); 404 while (!sc->sc_dying) { 405 if (usb_noexplore < 2) 406 usb_discover(sc); 407 408 if (sc->sc_bus->lock) 409 cv_timedwait(&sc->sc_bus->needs_explore_cv, 410 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 411 else 412 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 413 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 414 DPRINTFN(2,("usb_event_thread: woke up\n")); 415 } 416 sc->sc_event_thread = NULL; 417 418 /* In case parent is waiting for us to exit. */ 419 if (sc->sc_bus->lock) { 420 cv_signal(&sc->sc_bus->needs_explore_cv); 421 mutex_exit(sc->sc_bus->lock); 422 } else 423 wakeup(sc); /* XXXSMP ok */ 424 425 DPRINTF(("usb_event_thread: exit\n")); 426 kthread_exit(0); 427 } 428 429 void 430 usb_task_thread(void *arg) 431 { 432 struct usb_task *task; 433 struct usb_taskq *taskq; 434 435 taskq = arg; 436 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 437 438 mutex_enter(&taskq->lock); 439 for (;;) { 440 task = TAILQ_FIRST(&taskq->tasks); 441 if (task == NULL) { 442 cv_wait(&taskq->cv, &taskq->lock); 443 task = TAILQ_FIRST(&taskq->tasks); 444 } 445 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 446 if (task != NULL) { 447 TAILQ_REMOVE(&taskq->tasks, task, next); 448 task->queue = -1; 449 mutex_exit(&taskq->lock); 450 task->fun(task->arg); 451 mutex_enter(&taskq->lock); 452 } 453 } 454 mutex_exit(&taskq->lock); 455 } 456 457 int 458 usbctlprint(void *aux, const char *pnp) 459 { 460 /* only "usb"es can attach to host controllers */ 461 if (pnp) 462 aprint_normal("usb at %s", pnp); 463 464 return (UNCONF); 465 } 466 467 int 468 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 469 { 470 int unit = minor(dev); 471 struct usb_softc *sc; 472 473 if (unit == USB_DEV_MINOR) { 474 if (usb_dev_open) 475 return (EBUSY); 476 usb_dev_open = 1; 477 mutex_enter(proc_lock); 478 usb_async_proc = 0; 479 mutex_exit(proc_lock); 480 return (0); 481 } 482 483 sc = device_lookup_private(&usb_cd, unit); 484 if (!sc) 485 return (ENXIO); 486 487 if (sc->sc_dying) 488 return (EIO); 489 490 return (0); 491 } 492 493 int 494 usbread(dev_t dev, struct uio *uio, int flag) 495 { 496 struct usb_event *ue; 497 #ifdef COMPAT_30 498 struct usb_event_old *ueo = NULL; /* XXXGCC */ 499 #endif 500 int error, n, useold; 501 502 if (minor(dev) != USB_DEV_MINOR) 503 return (ENXIO); 504 505 useold = 0; 506 switch (uio->uio_resid) { 507 #ifdef COMPAT_30 508 case sizeof(struct usb_event_old): 509 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 510 M_WAITOK|M_ZERO); 511 useold = 1; 512 /* FALLTHRU */ 513 #endif 514 case sizeof(struct usb_event): 515 ue = usb_alloc_event(); 516 break; 517 default: 518 return (EINVAL); 519 } 520 521 error = 0; 522 mutex_enter(&usb_event_lock); 523 for (;;) { 524 n = usb_get_next_event(ue); 525 if (n != 0) 526 break; 527 if (flag & IO_NDELAY) { 528 error = EWOULDBLOCK; 529 break; 530 } 531 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 532 if (error) 533 break; 534 } 535 mutex_exit(&usb_event_lock); 536 if (!error) { 537 #ifdef COMPAT_30 538 if (useold) { /* copy fields to old struct */ 539 ueo->ue_type = ue->ue_type; 540 memcpy(&ueo->ue_time, &ue->ue_time, 541 sizeof(struct timespec)); 542 switch (ue->ue_type) { 543 case USB_EVENT_DEVICE_ATTACH: 544 case USB_EVENT_DEVICE_DETACH: 545 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 546 break; 547 548 case USB_EVENT_CTRLR_ATTACH: 549 case USB_EVENT_CTRLR_DETACH: 550 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 551 break; 552 553 case USB_EVENT_DRIVER_ATTACH: 554 case USB_EVENT_DRIVER_DETACH: 555 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 556 memcpy(ueo->u.ue_driver.ue_devname, 557 ue->u.ue_driver.ue_devname, 558 sizeof(ue->u.ue_driver.ue_devname)); 559 break; 560 default: 561 ; 562 } 563 564 error = uiomove((void *)ueo, sizeof *ueo, uio); 565 } else 566 #endif 567 error = uiomove((void *)ue, sizeof *ue, uio); 568 } 569 usb_free_event(ue); 570 #ifdef COMPAT_30 571 if (useold) 572 free(ueo, M_USBDEV); 573 #endif 574 575 return (error); 576 } 577 578 int 579 usbclose(dev_t dev, int flag, int mode, 580 struct lwp *l) 581 { 582 int unit = minor(dev); 583 584 if (unit == USB_DEV_MINOR) { 585 mutex_enter(proc_lock); 586 usb_async_proc = 0; 587 mutex_exit(proc_lock); 588 usb_dev_open = 0; 589 } 590 591 return (0); 592 } 593 594 int 595 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 596 { 597 struct usb_softc *sc; 598 int unit = minor(devt); 599 600 if (unit == USB_DEV_MINOR) { 601 switch (cmd) { 602 case FIONBIO: 603 /* All handled in the upper FS layer. */ 604 return (0); 605 606 case FIOASYNC: 607 mutex_enter(proc_lock); 608 if (*(int *)data) 609 usb_async_proc = l->l_proc; 610 else 611 usb_async_proc = 0; 612 mutex_exit(proc_lock); 613 return (0); 614 615 default: 616 return (EINVAL); 617 } 618 } 619 620 sc = device_lookup_private(&usb_cd, unit); 621 622 if (sc->sc_dying) 623 return (EIO); 624 625 switch (cmd) { 626 #ifdef USB_DEBUG 627 case USB_SETDEBUG: 628 if (!(flag & FWRITE)) 629 return (EBADF); 630 usbdebug = ((*(int *)data) & 0x000000ff); 631 break; 632 #endif /* USB_DEBUG */ 633 case USB_REQUEST: 634 { 635 struct usb_ctl_request *ur = (void *)data; 636 int len = UGETW(ur->ucr_request.wLength); 637 struct iovec iov; 638 struct uio uio; 639 void *ptr = 0; 640 int addr = ur->ucr_addr; 641 usbd_status err; 642 int error = 0; 643 644 if (!(flag & FWRITE)) 645 return (EBADF); 646 647 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 648 if (len < 0 || len > 32768) 649 return (EINVAL); 650 if (addr < 0 || addr >= USB_MAX_DEVICES || 651 sc->sc_bus->devices[addr] == 0) 652 return (EINVAL); 653 if (len != 0) { 654 iov.iov_base = (void *)ur->ucr_data; 655 iov.iov_len = len; 656 uio.uio_iov = &iov; 657 uio.uio_iovcnt = 1; 658 uio.uio_resid = len; 659 uio.uio_offset = 0; 660 uio.uio_rw = 661 ur->ucr_request.bmRequestType & UT_READ ? 662 UIO_READ : UIO_WRITE; 663 uio.uio_vmspace = l->l_proc->p_vmspace; 664 ptr = malloc(len, M_TEMP, M_WAITOK); 665 if (uio.uio_rw == UIO_WRITE) { 666 error = uiomove(ptr, len, &uio); 667 if (error) 668 goto ret; 669 } 670 } 671 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 672 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 673 USBD_DEFAULT_TIMEOUT); 674 if (err) { 675 error = EIO; 676 goto ret; 677 } 678 if (len > ur->ucr_actlen) 679 len = ur->ucr_actlen; 680 if (len != 0) { 681 if (uio.uio_rw == UIO_READ) { 682 error = uiomove(ptr, len, &uio); 683 if (error) 684 goto ret; 685 } 686 } 687 ret: 688 if (ptr) 689 free(ptr, M_TEMP); 690 return (error); 691 } 692 693 case USB_DEVICEINFO: 694 { 695 usbd_device_handle dev; 696 struct usb_device_info *di = (void *)data; 697 int addr = di->udi_addr; 698 699 if (addr < 1 || addr >= USB_MAX_DEVICES) 700 return EINVAL; 701 if ((dev = sc->sc_bus->devices[addr]) == NULL) 702 return ENXIO; 703 usbd_fill_deviceinfo(dev, di, 1); 704 break; 705 } 706 707 #ifdef COMPAT_30 708 case USB_DEVICEINFO_OLD: 709 { 710 usbd_device_handle dev; 711 struct usb_device_info_old *di = (void *)data; 712 int addr = di->udi_addr; 713 714 if (addr < 1 || addr >= USB_MAX_DEVICES) 715 return EINVAL; 716 if ((dev = sc->sc_bus->devices[addr]) == NULL) 717 return ENXIO; 718 usbd_fill_deviceinfo_old(dev, di, 1); 719 break; 720 } 721 #endif 722 723 case USB_DEVICESTATS: 724 *(struct usb_device_stats *)data = sc->sc_bus->stats; 725 break; 726 727 default: 728 return (EINVAL); 729 } 730 return (0); 731 } 732 733 int 734 usbpoll(dev_t dev, int events, struct lwp *l) 735 { 736 int revents, mask; 737 738 if (minor(dev) == USB_DEV_MINOR) { 739 revents = 0; 740 mask = POLLIN | POLLRDNORM; 741 742 mutex_enter(&usb_event_lock); 743 if (events & mask && usb_nevents > 0) 744 revents |= events & mask; 745 if (revents == 0 && events & mask) 746 selrecord(l, &usb_selevent); 747 mutex_exit(&usb_event_lock); 748 749 return (revents); 750 } else { 751 return (0); 752 } 753 } 754 755 static void 756 filt_usbrdetach(struct knote *kn) 757 { 758 759 mutex_enter(&usb_event_lock); 760 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 761 mutex_exit(&usb_event_lock); 762 } 763 764 static int 765 filt_usbread(struct knote *kn, long hint) 766 { 767 768 if (usb_nevents == 0) 769 return (0); 770 771 kn->kn_data = sizeof(struct usb_event); 772 return (1); 773 } 774 775 static const struct filterops usbread_filtops = 776 { 1, NULL, filt_usbrdetach, filt_usbread }; 777 778 int 779 usbkqfilter(dev_t dev, struct knote *kn) 780 { 781 struct klist *klist; 782 783 switch (kn->kn_filter) { 784 case EVFILT_READ: 785 if (minor(dev) != USB_DEV_MINOR) 786 return (1); 787 klist = &usb_selevent.sel_klist; 788 kn->kn_fop = &usbread_filtops; 789 break; 790 791 default: 792 return (EINVAL); 793 } 794 795 kn->kn_hook = NULL; 796 797 mutex_enter(&usb_event_lock); 798 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 799 mutex_exit(&usb_event_lock); 800 801 return (0); 802 } 803 804 /* Explore device tree from the root. */ 805 Static void 806 usb_discover(struct usb_softc *sc) 807 { 808 809 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 810 811 DPRINTFN(2,("usb_discover\n")); 812 if (usb_noexplore > 1) 813 return; 814 /* 815 * We need mutual exclusion while traversing the device tree, 816 * but this is guaranteed since this function is only called 817 * from the event thread for the controller. 818 * 819 * Also, we now have sc_bus->lock held for MPSAFE controllers. 820 */ 821 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 822 sc->sc_bus->needs_explore = 0; 823 if (sc->sc_bus->lock) 824 mutex_exit(sc->sc_bus->lock); 825 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 826 if (sc->sc_bus->lock) 827 mutex_enter(sc->sc_bus->lock); 828 } 829 } 830 831 void 832 usb_needs_explore(usbd_device_handle dev) 833 { 834 DPRINTFN(2,("usb_needs_explore\n")); 835 if (dev->bus->lock) 836 mutex_enter(dev->bus->lock); 837 dev->bus->needs_explore = 1; 838 if (dev->bus->lock) { 839 cv_signal(&dev->bus->needs_explore_cv); 840 mutex_exit(dev->bus->lock); 841 } else 842 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 843 } 844 845 void 846 usb_needs_reattach(usbd_device_handle dev) 847 { 848 DPRINTFN(2,("usb_needs_reattach\n")); 849 if (dev->bus->lock) 850 mutex_enter(dev->bus->lock); 851 dev->powersrc->reattach = 1; 852 dev->bus->needs_explore = 1; 853 if (dev->bus->lock) { 854 cv_signal(&dev->bus->needs_explore_cv); 855 mutex_exit(dev->bus->lock); 856 } else 857 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 858 } 859 860 /* Called at with usb_event_lock held. */ 861 int 862 usb_get_next_event(struct usb_event *ue) 863 { 864 struct usb_event_q *ueq; 865 866 KASSERT(mutex_owned(&usb_event_lock)); 867 868 if (usb_nevents <= 0) 869 return (0); 870 ueq = SIMPLEQ_FIRST(&usb_events); 871 #ifdef DIAGNOSTIC 872 if (ueq == NULL) { 873 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 874 usb_nevents = 0; 875 return (0); 876 } 877 #endif 878 if (ue) 879 *ue = ueq->ue; 880 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 881 usb_free_event((struct usb_event *)(void *)ueq); 882 usb_nevents--; 883 return (1); 884 } 885 886 void 887 usbd_add_dev_event(int type, usbd_device_handle udev) 888 { 889 struct usb_event *ue = usb_alloc_event(); 890 891 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 892 usb_add_event(type, ue); 893 } 894 895 void 896 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 897 { 898 struct usb_event *ue = usb_alloc_event(); 899 900 ue->u.ue_driver.ue_cookie = udev->cookie; 901 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 902 sizeof ue->u.ue_driver.ue_devname); 903 usb_add_event(type, ue); 904 } 905 906 Static struct usb_event * 907 usb_alloc_event(void) 908 { 909 /* Yes, this is right; we allocate enough so that we can use it later */ 910 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 911 } 912 913 Static void 914 usb_free_event(struct usb_event *uep) 915 { 916 free(uep, M_USBDEV); 917 } 918 919 Static void 920 usb_add_event(int type, struct usb_event *uep) 921 { 922 struct usb_event_q *ueq; 923 struct timeval thetime; 924 925 microtime(&thetime); 926 /* Don't want to wait here with usb_event_lock held */ 927 ueq = (struct usb_event_q *)(void *)uep; 928 ueq->ue = *uep; 929 ueq->ue.ue_type = type; 930 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 931 932 mutex_enter(&usb_event_lock); 933 if (++usb_nevents >= USB_MAX_EVENTS) { 934 /* Too many queued events, drop an old one. */ 935 DPRINTFN(-1,("usb: event dropped\n")); 936 (void)usb_get_next_event(0); 937 } 938 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 939 cv_signal(&usb_event_cv); 940 selnotify(&usb_selevent, 0, 0); 941 if (usb_async_proc != NULL) { 942 kpreempt_disable(); 943 softint_schedule(usb_async_sih); 944 kpreempt_enable(); 945 } 946 mutex_exit(&usb_event_lock); 947 } 948 949 Static void 950 usb_async_intr(void *cookie) 951 { 952 proc_t *proc; 953 954 mutex_enter(proc_lock); 955 if ((proc = usb_async_proc) != NULL) 956 psignal(proc, SIGIO); 957 mutex_exit(proc_lock); 958 } 959 960 Static void 961 usb_soft_intr(void *arg) 962 { 963 usbd_bus_handle bus = arg; 964 965 if (bus->lock) 966 mutex_enter(bus->lock); 967 (*bus->methods->soft_intr)(bus); 968 if (bus->lock) 969 mutex_exit(bus->lock); 970 } 971 972 void 973 usb_schedsoftintr(usbd_bus_handle bus) 974 { 975 976 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 977 978 if (bus->use_polling) { 979 bus->methods->soft_intr(bus); 980 } else { 981 kpreempt_disable(); 982 softint_schedule(bus->soft); 983 kpreempt_enable(); 984 } 985 } 986 987 int 988 usb_activate(device_t self, enum devact act) 989 { 990 struct usb_softc *sc = device_private(self); 991 992 switch (act) { 993 case DVACT_DEACTIVATE: 994 sc->sc_dying = 1; 995 return 0; 996 default: 997 return EOPNOTSUPP; 998 } 999 } 1000 1001 void 1002 usb_childdet(device_t self, device_t child) 1003 { 1004 int i; 1005 struct usb_softc *sc = device_private(self); 1006 struct usbd_device *dev; 1007 1008 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1009 return; 1010 1011 for (i = 0; i < dev->subdevlen; i++) 1012 if (dev->subdevs[i] == child) 1013 dev->subdevs[i] = NULL; 1014 } 1015 1016 int 1017 usb_detach(device_t self, int flags) 1018 { 1019 struct usb_softc *sc = device_private(self); 1020 struct usb_event *ue; 1021 int rc; 1022 1023 DPRINTF(("usb_detach: start\n")); 1024 1025 /* Make all devices disconnect. */ 1026 if (sc->sc_port.device != NULL && 1027 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1028 return rc; 1029 1030 pmf_device_deregister(self); 1031 /* Kill off event thread. */ 1032 sc->sc_dying = 1; 1033 while (sc->sc_event_thread != NULL) { 1034 if (sc->sc_bus->lock) { 1035 mutex_enter(sc->sc_bus->lock); 1036 cv_signal(&sc->sc_bus->needs_explore_cv); 1037 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1038 sc->sc_bus->lock, hz * 60); 1039 mutex_exit(sc->sc_bus->lock); 1040 } else { 1041 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1042 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1043 } 1044 } 1045 DPRINTF(("usb_detach: event thread dead\n")); 1046 1047 if (sc->sc_bus->soft != NULL) { 1048 softint_disestablish(sc->sc_bus->soft); 1049 sc->sc_bus->soft = NULL; 1050 } 1051 1052 ue = usb_alloc_event(); 1053 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1054 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1055 1056 cv_destroy(&sc->sc_bus->needs_explore_cv); 1057 1058 return (0); 1059 } 1060 1061 #ifdef COMPAT_30 1062 Static void 1063 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1064 const struct usb_device_info *ue) 1065 { 1066 const unsigned char *p; 1067 unsigned char *q; 1068 int i, n; 1069 1070 uo->udi_bus = ue->udi_bus; 1071 uo->udi_addr = ue->udi_addr; 1072 uo->udi_cookie = ue->udi_cookie; 1073 for (i = 0, p = (const unsigned char *)ue->udi_product, 1074 q = (unsigned char *)uo->udi_product; 1075 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1076 if (*p < 0x80) 1077 q[i++] = *p; 1078 else { 1079 q[i++] = '?'; 1080 if ((*p & 0xe0) == 0xe0) 1081 p++; 1082 p++; 1083 } 1084 } 1085 q[i] = 0; 1086 1087 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1088 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1089 if (* p < 0x80) 1090 q[i++] = *p; 1091 else { 1092 q[i++] = '?'; 1093 p++; 1094 if ((*p & 0xe0) == 0xe0) 1095 p++; 1096 } 1097 } 1098 q[i] = 0; 1099 1100 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1101 1102 uo->udi_productNo = ue->udi_productNo; 1103 uo->udi_vendorNo = ue->udi_vendorNo; 1104 uo->udi_releaseNo = ue->udi_releaseNo; 1105 uo->udi_class = ue->udi_class; 1106 uo->udi_subclass = ue->udi_subclass; 1107 uo->udi_protocol = ue->udi_protocol; 1108 uo->udi_config = ue->udi_config; 1109 uo->udi_speed = ue->udi_speed; 1110 uo->udi_power = ue->udi_power; 1111 uo->udi_nports = ue->udi_nports; 1112 1113 for (n=0; n<USB_MAX_DEVNAMES; n++) 1114 memcpy(uo->udi_devnames[n], 1115 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1116 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1117 } 1118 #endif 1119
Indexes created Tue Sep 23 07:09:52 GMT 2025