usb.c revision 1.133
1 /* $NetBSD: usb.c,v 1.133 2012/07/20 02:23:35 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 1.133 2012/07/20 02:23:35 christos 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 { 365 366 if (task->queue != -1) { 367 struct usb_taskq *taskq = &usb_taskq[task->queue]; 368 mutex_enter(&taskq->lock); 369 TAILQ_REMOVE(&taskq->tasks, task, next); 370 task->queue = -1; 371 mutex_exit(&taskq->lock); 372 } 373 } 374 375 void 376 usb_event_thread(void *arg) 377 { 378 struct usb_softc *sc = arg; 379 380 DPRINTF(("usb_event_thread: start\n")); 381 382 /* 383 * In case this controller is a companion controller to an 384 * EHCI controller we need to wait until the EHCI controller 385 * has grabbed the port. 386 * XXX It would be nicer to do this with a tsleep(), but I don't 387 * know how to synchronize the creation of the threads so it 388 * will work. 389 */ 390 usb_delay_ms(sc->sc_bus, 500); 391 392 /* Make sure first discover does something. */ 393 if (sc->sc_bus->lock) 394 mutex_enter(sc->sc_bus->lock); 395 sc->sc_bus->needs_explore = 1; 396 usb_discover(sc); 397 if (sc->sc_bus->lock) 398 mutex_exit(sc->sc_bus->lock); 399 config_pending_decr(); 400 401 if (sc->sc_bus->lock) 402 mutex_enter(sc->sc_bus->lock); 403 while (!sc->sc_dying) { 404 if (usb_noexplore < 2) 405 usb_discover(sc); 406 407 if (sc->sc_bus->lock) 408 cv_timedwait(&sc->sc_bus->needs_explore_cv, 409 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 410 else 411 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 412 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 413 DPRINTFN(2,("usb_event_thread: woke up\n")); 414 } 415 sc->sc_event_thread = NULL; 416 417 /* In case parent is waiting for us to exit. */ 418 if (sc->sc_bus->lock) { 419 cv_signal(&sc->sc_bus->needs_explore_cv); 420 mutex_exit(sc->sc_bus->lock); 421 } else 422 wakeup(sc); /* XXXSMP ok */ 423 424 DPRINTF(("usb_event_thread: exit\n")); 425 kthread_exit(0); 426 } 427 428 void 429 usb_task_thread(void *arg) 430 { 431 struct usb_task *task; 432 struct usb_taskq *taskq; 433 434 taskq = arg; 435 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 436 437 mutex_enter(&taskq->lock); 438 for (;;) { 439 task = TAILQ_FIRST(&taskq->tasks); 440 if (task == NULL) { 441 cv_wait(&taskq->cv, &taskq->lock); 442 task = TAILQ_FIRST(&taskq->tasks); 443 } 444 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 445 if (task != NULL) { 446 TAILQ_REMOVE(&taskq->tasks, task, next); 447 task->queue = -1; 448 mutex_exit(&taskq->lock); 449 task->fun(task->arg); 450 mutex_enter(&taskq->lock); 451 } 452 } 453 mutex_exit(&taskq->lock); 454 } 455 456 int 457 usbctlprint(void *aux, const char *pnp) 458 { 459 /* only "usb"es can attach to host controllers */ 460 if (pnp) 461 aprint_normal("usb at %s", pnp); 462 463 return (UNCONF); 464 } 465 466 int 467 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 468 { 469 int unit = minor(dev); 470 struct usb_softc *sc; 471 472 if (unit == USB_DEV_MINOR) { 473 if (usb_dev_open) 474 return (EBUSY); 475 usb_dev_open = 1; 476 mutex_enter(proc_lock); 477 usb_async_proc = 0; 478 mutex_exit(proc_lock); 479 return (0); 480 } 481 482 sc = device_lookup_private(&usb_cd, unit); 483 if (!sc) 484 return (ENXIO); 485 486 if (sc->sc_dying) 487 return (EIO); 488 489 return (0); 490 } 491 492 int 493 usbread(dev_t dev, struct uio *uio, int flag) 494 { 495 struct usb_event *ue; 496 #ifdef COMPAT_30 497 struct usb_event_old *ueo = NULL; /* XXXGCC */ 498 #endif 499 int error, n, useold; 500 501 if (minor(dev) != USB_DEV_MINOR) 502 return (ENXIO); 503 504 useold = 0; 505 switch (uio->uio_resid) { 506 #ifdef COMPAT_30 507 case sizeof(struct usb_event_old): 508 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 509 M_WAITOK|M_ZERO); 510 useold = 1; 511 /* FALLTHRU */ 512 #endif 513 case sizeof(struct usb_event): 514 ue = usb_alloc_event(); 515 break; 516 default: 517 return (EINVAL); 518 } 519 520 error = 0; 521 mutex_enter(&usb_event_lock); 522 for (;;) { 523 n = usb_get_next_event(ue); 524 if (n != 0) 525 break; 526 if (flag & IO_NDELAY) { 527 error = EWOULDBLOCK; 528 break; 529 } 530 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 531 if (error) 532 break; 533 } 534 mutex_exit(&usb_event_lock); 535 if (!error) { 536 #ifdef COMPAT_30 537 if (useold) { /* copy fields to old struct */ 538 ueo->ue_type = ue->ue_type; 539 memcpy(&ueo->ue_time, &ue->ue_time, 540 sizeof(struct timespec)); 541 switch (ue->ue_type) { 542 case USB_EVENT_DEVICE_ATTACH: 543 case USB_EVENT_DEVICE_DETACH: 544 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 545 break; 546 547 case USB_EVENT_CTRLR_ATTACH: 548 case USB_EVENT_CTRLR_DETACH: 549 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 550 break; 551 552 case USB_EVENT_DRIVER_ATTACH: 553 case USB_EVENT_DRIVER_DETACH: 554 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 555 memcpy(ueo->u.ue_driver.ue_devname, 556 ue->u.ue_driver.ue_devname, 557 sizeof(ue->u.ue_driver.ue_devname)); 558 break; 559 default: 560 ; 561 } 562 563 error = uiomove((void *)ueo, sizeof *ueo, uio); 564 } else 565 #endif 566 error = uiomove((void *)ue, sizeof *ue, uio); 567 } 568 usb_free_event(ue); 569 #ifdef COMPAT_30 570 if (useold) 571 free(ueo, M_USBDEV); 572 #endif 573 574 return (error); 575 } 576 577 int 578 usbclose(dev_t dev, int flag, int mode, 579 struct lwp *l) 580 { 581 int unit = minor(dev); 582 583 if (unit == USB_DEV_MINOR) { 584 mutex_enter(proc_lock); 585 usb_async_proc = 0; 586 mutex_exit(proc_lock); 587 usb_dev_open = 0; 588 } 589 590 return (0); 591 } 592 593 int 594 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 595 { 596 struct usb_softc *sc; 597 int unit = minor(devt); 598 599 if (unit == USB_DEV_MINOR) { 600 switch (cmd) { 601 case FIONBIO: 602 /* All handled in the upper FS layer. */ 603 return (0); 604 605 case FIOASYNC: 606 mutex_enter(proc_lock); 607 if (*(int *)data) 608 usb_async_proc = l->l_proc; 609 else 610 usb_async_proc = 0; 611 mutex_exit(proc_lock); 612 return (0); 613 614 default: 615 return (EINVAL); 616 } 617 } 618 619 sc = device_lookup_private(&usb_cd, unit); 620 621 if (sc->sc_dying) 622 return (EIO); 623 624 switch (cmd) { 625 #ifdef USB_DEBUG 626 case USB_SETDEBUG: 627 if (!(flag & FWRITE)) 628 return (EBADF); 629 usbdebug = ((*(int *)data) & 0x000000ff); 630 break; 631 #endif /* USB_DEBUG */ 632 case USB_REQUEST: 633 { 634 struct usb_ctl_request *ur = (void *)data; 635 int len = UGETW(ur->ucr_request.wLength); 636 struct iovec iov; 637 struct uio uio; 638 void *ptr = 0; 639 int addr = ur->ucr_addr; 640 usbd_status err; 641 int error = 0; 642 643 if (!(flag & FWRITE)) 644 return (EBADF); 645 646 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 647 if (len < 0 || len > 32768) 648 return (EINVAL); 649 if (addr < 0 || addr >= USB_MAX_DEVICES || 650 sc->sc_bus->devices[addr] == 0) 651 return (EINVAL); 652 if (len != 0) { 653 iov.iov_base = (void *)ur->ucr_data; 654 iov.iov_len = len; 655 uio.uio_iov = &iov; 656 uio.uio_iovcnt = 1; 657 uio.uio_resid = len; 658 uio.uio_offset = 0; 659 uio.uio_rw = 660 ur->ucr_request.bmRequestType & UT_READ ? 661 UIO_READ : UIO_WRITE; 662 uio.uio_vmspace = l->l_proc->p_vmspace; 663 ptr = malloc(len, M_TEMP, M_WAITOK); 664 if (uio.uio_rw == UIO_WRITE) { 665 error = uiomove(ptr, len, &uio); 666 if (error) 667 goto ret; 668 } 669 } 670 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 671 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 672 USBD_DEFAULT_TIMEOUT); 673 if (err) { 674 error = EIO; 675 goto ret; 676 } 677 if (len > ur->ucr_actlen) 678 len = ur->ucr_actlen; 679 if (len != 0) { 680 if (uio.uio_rw == UIO_READ) { 681 error = uiomove(ptr, len, &uio); 682 if (error) 683 goto ret; 684 } 685 } 686 ret: 687 if (ptr) 688 free(ptr, M_TEMP); 689 return (error); 690 } 691 692 case USB_DEVICEINFO: 693 { 694 usbd_device_handle dev; 695 struct usb_device_info *di = (void *)data; 696 int addr = di->udi_addr; 697 698 if (addr < 1 || addr >= USB_MAX_DEVICES) 699 return EINVAL; 700 if ((dev = sc->sc_bus->devices[addr]) == NULL) 701 return ENXIO; 702 usbd_fill_deviceinfo(dev, di, 1); 703 break; 704 } 705 706 #ifdef COMPAT_30 707 case USB_DEVICEINFO_OLD: 708 { 709 usbd_device_handle dev; 710 struct usb_device_info_old *di = (void *)data; 711 int addr = di->udi_addr; 712 713 if (addr < 1 || addr >= USB_MAX_DEVICES) 714 return EINVAL; 715 if ((dev = sc->sc_bus->devices[addr]) == NULL) 716 return ENXIO; 717 usbd_fill_deviceinfo_old(dev, di, 1); 718 break; 719 } 720 #endif 721 722 case USB_DEVICESTATS: 723 *(struct usb_device_stats *)data = sc->sc_bus->stats; 724 break; 725 726 default: 727 return (EINVAL); 728 } 729 return (0); 730 } 731 732 int 733 usbpoll(dev_t dev, int events, struct lwp *l) 734 { 735 int revents, mask; 736 737 if (minor(dev) == USB_DEV_MINOR) { 738 revents = 0; 739 mask = POLLIN | POLLRDNORM; 740 741 mutex_enter(&usb_event_lock); 742 if (events & mask && usb_nevents > 0) 743 revents |= events & mask; 744 if (revents == 0 && events & mask) 745 selrecord(l, &usb_selevent); 746 mutex_exit(&usb_event_lock); 747 748 return (revents); 749 } else { 750 return (0); 751 } 752 } 753 754 static void 755 filt_usbrdetach(struct knote *kn) 756 { 757 758 mutex_enter(&usb_event_lock); 759 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 760 mutex_exit(&usb_event_lock); 761 } 762 763 static int 764 filt_usbread(struct knote *kn, long hint) 765 { 766 767 if (usb_nevents == 0) 768 return (0); 769 770 kn->kn_data = sizeof(struct usb_event); 771 return (1); 772 } 773 774 static const struct filterops usbread_filtops = 775 { 1, NULL, filt_usbrdetach, filt_usbread }; 776 777 int 778 usbkqfilter(dev_t dev, struct knote *kn) 779 { 780 struct klist *klist; 781 782 switch (kn->kn_filter) { 783 case EVFILT_READ: 784 if (minor(dev) != USB_DEV_MINOR) 785 return (1); 786 klist = &usb_selevent.sel_klist; 787 kn->kn_fop = &usbread_filtops; 788 break; 789 790 default: 791 return (EINVAL); 792 } 793 794 kn->kn_hook = NULL; 795 796 mutex_enter(&usb_event_lock); 797 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 798 mutex_exit(&usb_event_lock); 799 800 return (0); 801 } 802 803 /* Explore device tree from the root. */ 804 Static void 805 usb_discover(struct usb_softc *sc) 806 { 807 808 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 809 810 DPRINTFN(2,("usb_discover\n")); 811 if (usb_noexplore > 1) 812 return; 813 /* 814 * We need mutual exclusion while traversing the device tree, 815 * but this is guaranteed since this function is only called 816 * from the event thread for the controller. 817 * 818 * Also, we now have sc_bus->lock held for MPSAFE controllers. 819 */ 820 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 821 sc->sc_bus->needs_explore = 0; 822 if (sc->sc_bus->lock) 823 mutex_exit(sc->sc_bus->lock); 824 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 825 if (sc->sc_bus->lock) 826 mutex_enter(sc->sc_bus->lock); 827 } 828 } 829 830 void 831 usb_needs_explore(usbd_device_handle dev) 832 { 833 DPRINTFN(2,("usb_needs_explore\n")); 834 if (dev->bus->lock) 835 mutex_enter(dev->bus->lock); 836 dev->bus->needs_explore = 1; 837 if (dev->bus->lock) { 838 cv_signal(&dev->bus->needs_explore_cv); 839 mutex_exit(dev->bus->lock); 840 } else 841 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 842 } 843 844 void 845 usb_needs_reattach(usbd_device_handle dev) 846 { 847 DPRINTFN(2,("usb_needs_reattach\n")); 848 if (dev->bus->lock) 849 mutex_enter(dev->bus->lock); 850 dev->powersrc->reattach = 1; 851 dev->bus->needs_explore = 1; 852 if (dev->bus->lock) { 853 cv_signal(&dev->bus->needs_explore_cv); 854 mutex_exit(dev->bus->lock); 855 } else 856 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 857 } 858 859 /* Called at with usb_event_lock held. */ 860 int 861 usb_get_next_event(struct usb_event *ue) 862 { 863 struct usb_event_q *ueq; 864 865 KASSERT(mutex_owned(&usb_event_lock)); 866 867 if (usb_nevents <= 0) 868 return (0); 869 ueq = SIMPLEQ_FIRST(&usb_events); 870 #ifdef DIAGNOSTIC 871 if (ueq == NULL) { 872 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 873 usb_nevents = 0; 874 return (0); 875 } 876 #endif 877 if (ue) 878 *ue = ueq->ue; 879 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 880 usb_free_event((struct usb_event *)(void *)ueq); 881 usb_nevents--; 882 return (1); 883 } 884 885 void 886 usbd_add_dev_event(int type, usbd_device_handle udev) 887 { 888 struct usb_event *ue = usb_alloc_event(); 889 890 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 891 usb_add_event(type, ue); 892 } 893 894 void 895 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 896 { 897 struct usb_event *ue = usb_alloc_event(); 898 899 ue->u.ue_driver.ue_cookie = udev->cookie; 900 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 901 sizeof ue->u.ue_driver.ue_devname); 902 usb_add_event(type, ue); 903 } 904 905 Static struct usb_event * 906 usb_alloc_event(void) 907 { 908 /* Yes, this is right; we allocate enough so that we can use it later */ 909 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 910 } 911 912 Static void 913 usb_free_event(struct usb_event *uep) 914 { 915 free(uep, M_USBDEV); 916 } 917 918 Static void 919 usb_add_event(int type, struct usb_event *uep) 920 { 921 struct usb_event_q *ueq; 922 struct timeval thetime; 923 924 microtime(&thetime); 925 /* Don't want to wait here with usb_event_lock held */ 926 ueq = (struct usb_event_q *)(void *)uep; 927 ueq->ue = *uep; 928 ueq->ue.ue_type = type; 929 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 930 931 mutex_enter(&usb_event_lock); 932 if (++usb_nevents >= USB_MAX_EVENTS) { 933 /* Too many queued events, drop an old one. */ 934 DPRINTFN(-1,("usb: event dropped\n")); 935 (void)usb_get_next_event(0); 936 } 937 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 938 cv_signal(&usb_event_cv); 939 selnotify(&usb_selevent, 0, 0); 940 if (usb_async_proc != NULL) { 941 kpreempt_disable(); 942 softint_schedule(usb_async_sih); 943 kpreempt_enable(); 944 } 945 mutex_exit(&usb_event_lock); 946 } 947 948 Static void 949 usb_async_intr(void *cookie) 950 { 951 proc_t *proc; 952 953 mutex_enter(proc_lock); 954 if ((proc = usb_async_proc) != NULL) 955 psignal(proc, SIGIO); 956 mutex_exit(proc_lock); 957 } 958 959 Static void 960 usb_soft_intr(void *arg) 961 { 962 usbd_bus_handle bus = arg; 963 964 if (bus->lock) 965 mutex_enter(bus->lock); 966 (*bus->methods->soft_intr)(bus); 967 if (bus->lock) 968 mutex_exit(bus->lock); 969 } 970 971 void 972 usb_schedsoftintr(usbd_bus_handle bus) 973 { 974 975 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 976 977 if (bus->use_polling) { 978 bus->methods->soft_intr(bus); 979 } else { 980 kpreempt_disable(); 981 softint_schedule(bus->soft); 982 kpreempt_enable(); 983 } 984 } 985 986 int 987 usb_activate(device_t self, enum devact act) 988 { 989 struct usb_softc *sc = device_private(self); 990 991 switch (act) { 992 case DVACT_DEACTIVATE: 993 sc->sc_dying = 1; 994 return 0; 995 default: 996 return EOPNOTSUPP; 997 } 998 } 999 1000 void 1001 usb_childdet(device_t self, device_t child) 1002 { 1003 int i; 1004 struct usb_softc *sc = device_private(self); 1005 struct usbd_device *dev; 1006 1007 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1008 return; 1009 1010 for (i = 0; i < dev->subdevlen; i++) 1011 if (dev->subdevs[i] == child) 1012 dev->subdevs[i] = NULL; 1013 } 1014 1015 int 1016 usb_detach(device_t self, int flags) 1017 { 1018 struct usb_softc *sc = device_private(self); 1019 struct usb_event *ue; 1020 int rc; 1021 1022 DPRINTF(("usb_detach: start\n")); 1023 1024 /* Make all devices disconnect. */ 1025 if (sc->sc_port.device != NULL && 1026 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1027 return rc; 1028 1029 pmf_device_deregister(self); 1030 /* Kill off event thread. */ 1031 sc->sc_dying = 1; 1032 while (sc->sc_event_thread != NULL) { 1033 if (sc->sc_bus->lock) { 1034 mutex_enter(sc->sc_bus->lock); 1035 cv_signal(&sc->sc_bus->needs_explore_cv); 1036 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1037 sc->sc_bus->lock, hz * 60); 1038 mutex_exit(sc->sc_bus->lock); 1039 } else { 1040 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1041 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1042 } 1043 } 1044 DPRINTF(("usb_detach: event thread dead\n")); 1045 1046 if (sc->sc_bus->soft != NULL) { 1047 softint_disestablish(sc->sc_bus->soft); 1048 sc->sc_bus->soft = NULL; 1049 } 1050 1051 ue = usb_alloc_event(); 1052 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1053 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1054 1055 cv_destroy(&sc->sc_bus->needs_explore_cv); 1056 1057 return (0); 1058 } 1059 1060 #ifdef COMPAT_30 1061 Static void 1062 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1063 const struct usb_device_info *ue) 1064 { 1065 const unsigned char *p; 1066 unsigned char *q; 1067 int i, n; 1068 1069 uo->udi_bus = ue->udi_bus; 1070 uo->udi_addr = ue->udi_addr; 1071 uo->udi_cookie = ue->udi_cookie; 1072 for (i = 0, p = (const unsigned char *)ue->udi_product, 1073 q = (unsigned char *)uo->udi_product; 1074 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1075 if (*p < 0x80) 1076 q[i++] = *p; 1077 else { 1078 q[i++] = '?'; 1079 if ((*p & 0xe0) == 0xe0) 1080 p++; 1081 p++; 1082 } 1083 } 1084 q[i] = 0; 1085 1086 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1087 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1088 if (* p < 0x80) 1089 q[i++] = *p; 1090 else { 1091 q[i++] = '?'; 1092 p++; 1093 if ((*p & 0xe0) == 0xe0) 1094 p++; 1095 } 1096 } 1097 q[i] = 0; 1098 1099 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1100 1101 uo->udi_productNo = ue->udi_productNo; 1102 uo->udi_vendorNo = ue->udi_vendorNo; 1103 uo->udi_releaseNo = ue->udi_releaseNo; 1104 uo->udi_class = ue->udi_class; 1105 uo->udi_subclass = ue->udi_subclass; 1106 uo->udi_protocol = ue->udi_protocol; 1107 uo->udi_config = ue->udi_config; 1108 uo->udi_speed = ue->udi_speed; 1109 uo->udi_power = ue->udi_power; 1110 uo->udi_nports = ue->udi_nports; 1111 1112 for (n=0; n<USB_MAX_DEVNAMES; n++) 1113 memcpy(uo->udi_devnames[n], 1114 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1115 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1116 } 1117 #endif 1118
Indexes created Tue Sep 23 07:09:52 GMT 2025