usb.c revision 1.134
1 /* $NetBSD: usb.c,v 1.134 2012/07/20 07:31:14 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 1.134 2012/07/20 07:31:14 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 usb_create_event_thread(self); 209 210 RUN_ONCE(&init_control, usb_once_init); 211 config_interrupts(self, usb_doattach); 212 } 213 214 static int 215 usb_once_init(void) 216 { 217 struct usb_taskq *taskq; 218 int i; 219 220 selinit(&usb_selevent); 221 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 222 cv_init(&usb_event_cv, "usbrea"); 223 224 for (i = 0; i < USB_NUM_TASKQS; i++) { 225 taskq = &usb_taskq[i]; 226 227 TAILQ_INIT(&taskq->tasks); 228 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_NONE); 229 cv_init(&taskq->cv, "usbtsk"); 230 taskq->name = taskq_names[i]; 231 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 232 usb_task_thread, taskq, &taskq->task_thread_lwp, 233 "%s", taskq->name)) { 234 printf("unable to create task thread: %s\n", taskq->name); 235 panic("usb_create_event_thread task"); 236 } 237 /* 238 * XXX we should make sure these threads are alive before 239 * end up using them in usb_doattach(). 240 */ 241 } 242 return 0; 243 } 244 245 static void 246 usb_doattach(device_t self) 247 { 248 struct usb_softc *sc = device_private(self); 249 usbd_device_handle dev; 250 usbd_status err; 251 int speed; 252 struct usb_event *ue; 253 const bool mpsafe = sc->sc_bus->methods->get_lock ? true : false; 254 255 DPRINTF(("usbd_doattach\n")); 256 257 sc->sc_bus->usbctl = self; 258 sc->sc_port.power = USB_MAX_POWER; 259 260 switch (sc->sc_bus->usbrev) { 261 case USBREV_1_0: 262 case USBREV_1_1: 263 speed = USB_SPEED_FULL; 264 break; 265 case USBREV_2_0: 266 speed = USB_SPEED_HIGH; 267 break; 268 default: 269 panic("usb_doattach"); 270 } 271 272 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 273 274 ue = usb_alloc_event(); 275 ue->u.ue_ctrlr.ue_bus = device_unit(self); 276 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 277 278 /* XXX we should have our own level */ 279 sc->sc_bus->soft = softint_establish( 280 SOFTINT_NET | (mpsafe ? SOFTINT_MPSAFE : 0), 281 usb_soft_intr, sc->sc_bus); 282 if (sc->sc_bus->soft == NULL) { 283 aprint_error("%s: can't register softintr\n", 284 device_xname(self)); 285 sc->sc_dying = 1; 286 return; 287 } 288 289 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 290 &sc->sc_port); 291 if (!err) { 292 dev = sc->sc_port.device; 293 if (dev->hub == NULL) { 294 sc->sc_dying = 1; 295 aprint_error("%s: root device is not a hub\n", 296 device_xname(self)); 297 return; 298 } 299 sc->sc_bus->root_hub = dev; 300 #if 1 301 /* 302 * Turning this code off will delay attachment of USB devices 303 * until the USB event thread is running, which means that 304 * the keyboard will not work until after cold boot. 305 */ 306 if (cold && (device_cfdata(self)->cf_flags & 1)) 307 dev->hub->explore(sc->sc_bus->root_hub); 308 #endif 309 } else { 310 aprint_error("%s: root hub problem, error=%d\n", 311 device_xname(self), err); 312 sc->sc_dying = 1; 313 } 314 315 config_pending_incr(); 316 317 if (!pmf_device_register(self, NULL, NULL)) 318 aprint_error_dev(self, "couldn't establish power handler\n"); 319 320 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 321 usb_async_intr, NULL); 322 323 return; 324 } 325 326 void 327 usb_create_event_thread(device_t self) 328 { 329 struct usb_softc *sc = device_private(self); 330 331 if (kthread_create(PRI_NONE, 332 sc->sc_bus->lock ? KTHREAD_MPSAFE : 0, NULL, 333 usb_event_thread, sc, &sc->sc_event_thread, 334 "%s", device_xname(self))) { 335 printf("%s: unable to create event thread for\n", 336 device_xname(self)); 337 panic("usb_create_event_thread"); 338 } 339 } 340 341 /* 342 * Add a task to be performed by the task thread. This function can be 343 * called from any context and the task will be executed in a process 344 * context ASAP. 345 */ 346 void 347 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 348 { 349 struct usb_taskq *taskq; 350 351 taskq = &usb_taskq[queue]; 352 mutex_enter(&taskq->lock); 353 if (task->queue == -1) { 354 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 355 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 356 task->queue = queue; 357 } else { 358 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 359 } 360 cv_signal(&taskq->cv); 361 mutex_exit(&taskq->lock); 362 } 363 364 void 365 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 366 { 367 368 if (task->queue != -1) { 369 struct usb_taskq *taskq = &usb_taskq[task->queue]; 370 mutex_enter(&taskq->lock); 371 TAILQ_REMOVE(&taskq->tasks, task, next); 372 task->queue = -1; 373 mutex_exit(&taskq->lock); 374 } 375 } 376 377 void 378 usb_event_thread(void *arg) 379 { 380 struct usb_softc *sc = arg; 381 382 DPRINTF(("usb_event_thread: start\n")); 383 384 /* 385 * In case this controller is a companion controller to an 386 * EHCI controller we need to wait until the EHCI controller 387 * has grabbed the port. 388 * XXX It would be nicer to do this with a tsleep(), but I don't 389 * know how to synchronize the creation of the threads so it 390 * will work. 391 */ 392 usb_delay_ms(sc->sc_bus, 500); 393 394 /* Make sure first discover does something. */ 395 if (sc->sc_bus->lock) 396 mutex_enter(sc->sc_bus->lock); 397 sc->sc_bus->needs_explore = 1; 398 usb_discover(sc); 399 if (sc->sc_bus->lock) 400 mutex_exit(sc->sc_bus->lock); 401 config_pending_decr(); 402 403 if (sc->sc_bus->lock) 404 mutex_enter(sc->sc_bus->lock); 405 while (!sc->sc_dying) { 406 if (usb_noexplore < 2) 407 usb_discover(sc); 408 409 if (sc->sc_bus->lock) 410 cv_timedwait(&sc->sc_bus->needs_explore_cv, 411 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 412 else 413 (void)tsleep(&sc->sc_bus->needs_explore, /* XXXSMP ok */ 414 PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); 415 DPRINTFN(2,("usb_event_thread: woke up\n")); 416 } 417 sc->sc_event_thread = NULL; 418 419 /* In case parent is waiting for us to exit. */ 420 if (sc->sc_bus->lock) { 421 cv_signal(&sc->sc_bus->needs_explore_cv); 422 mutex_exit(sc->sc_bus->lock); 423 } else 424 wakeup(sc); /* XXXSMP ok */ 425 426 DPRINTF(("usb_event_thread: exit\n")); 427 kthread_exit(0); 428 } 429 430 void 431 usb_task_thread(void *arg) 432 { 433 struct usb_task *task; 434 struct usb_taskq *taskq; 435 436 taskq = arg; 437 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 438 439 mutex_enter(&taskq->lock); 440 for (;;) { 441 task = TAILQ_FIRST(&taskq->tasks); 442 if (task == NULL) { 443 cv_wait(&taskq->cv, &taskq->lock); 444 task = TAILQ_FIRST(&taskq->tasks); 445 } 446 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 447 if (task != NULL) { 448 TAILQ_REMOVE(&taskq->tasks, task, next); 449 task->queue = -1; 450 mutex_exit(&taskq->lock); 451 task->fun(task->arg); 452 mutex_enter(&taskq->lock); 453 } 454 } 455 mutex_exit(&taskq->lock); 456 } 457 458 int 459 usbctlprint(void *aux, const char *pnp) 460 { 461 /* only "usb"es can attach to host controllers */ 462 if (pnp) 463 aprint_normal("usb at %s", pnp); 464 465 return (UNCONF); 466 } 467 468 int 469 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 470 { 471 int unit = minor(dev); 472 struct usb_softc *sc; 473 474 if (unit == USB_DEV_MINOR) { 475 if (usb_dev_open) 476 return (EBUSY); 477 usb_dev_open = 1; 478 mutex_enter(proc_lock); 479 usb_async_proc = 0; 480 mutex_exit(proc_lock); 481 return (0); 482 } 483 484 sc = device_lookup_private(&usb_cd, unit); 485 if (!sc) 486 return (ENXIO); 487 488 if (sc->sc_dying) 489 return (EIO); 490 491 return (0); 492 } 493 494 int 495 usbread(dev_t dev, struct uio *uio, int flag) 496 { 497 struct usb_event *ue; 498 #ifdef COMPAT_30 499 struct usb_event_old *ueo = NULL; /* XXXGCC */ 500 #endif 501 int error, n, useold; 502 503 if (minor(dev) != USB_DEV_MINOR) 504 return (ENXIO); 505 506 useold = 0; 507 switch (uio->uio_resid) { 508 #ifdef COMPAT_30 509 case sizeof(struct usb_event_old): 510 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 511 M_WAITOK|M_ZERO); 512 useold = 1; 513 /* FALLTHRU */ 514 #endif 515 case sizeof(struct usb_event): 516 ue = usb_alloc_event(); 517 break; 518 default: 519 return (EINVAL); 520 } 521 522 error = 0; 523 mutex_enter(&usb_event_lock); 524 for (;;) { 525 n = usb_get_next_event(ue); 526 if (n != 0) 527 break; 528 if (flag & IO_NDELAY) { 529 error = EWOULDBLOCK; 530 break; 531 } 532 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 533 if (error) 534 break; 535 } 536 mutex_exit(&usb_event_lock); 537 if (!error) { 538 #ifdef COMPAT_30 539 if (useold) { /* copy fields to old struct */ 540 ueo->ue_type = ue->ue_type; 541 memcpy(&ueo->ue_time, &ue->ue_time, 542 sizeof(struct timespec)); 543 switch (ue->ue_type) { 544 case USB_EVENT_DEVICE_ATTACH: 545 case USB_EVENT_DEVICE_DETACH: 546 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 547 break; 548 549 case USB_EVENT_CTRLR_ATTACH: 550 case USB_EVENT_CTRLR_DETACH: 551 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 552 break; 553 554 case USB_EVENT_DRIVER_ATTACH: 555 case USB_EVENT_DRIVER_DETACH: 556 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 557 memcpy(ueo->u.ue_driver.ue_devname, 558 ue->u.ue_driver.ue_devname, 559 sizeof(ue->u.ue_driver.ue_devname)); 560 break; 561 default: 562 ; 563 } 564 565 error = uiomove((void *)ueo, sizeof *ueo, uio); 566 } else 567 #endif 568 error = uiomove((void *)ue, sizeof *ue, uio); 569 } 570 usb_free_event(ue); 571 #ifdef COMPAT_30 572 if (useold) 573 free(ueo, M_USBDEV); 574 #endif 575 576 return (error); 577 } 578 579 int 580 usbclose(dev_t dev, int flag, int mode, 581 struct lwp *l) 582 { 583 int unit = minor(dev); 584 585 if (unit == USB_DEV_MINOR) { 586 mutex_enter(proc_lock); 587 usb_async_proc = 0; 588 mutex_exit(proc_lock); 589 usb_dev_open = 0; 590 } 591 592 return (0); 593 } 594 595 int 596 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 597 { 598 struct usb_softc *sc; 599 int unit = minor(devt); 600 601 if (unit == USB_DEV_MINOR) { 602 switch (cmd) { 603 case FIONBIO: 604 /* All handled in the upper FS layer. */ 605 return (0); 606 607 case FIOASYNC: 608 mutex_enter(proc_lock); 609 if (*(int *)data) 610 usb_async_proc = l->l_proc; 611 else 612 usb_async_proc = 0; 613 mutex_exit(proc_lock); 614 return (0); 615 616 default: 617 return (EINVAL); 618 } 619 } 620 621 sc = device_lookup_private(&usb_cd, unit); 622 623 if (sc->sc_dying) 624 return (EIO); 625 626 switch (cmd) { 627 #ifdef USB_DEBUG 628 case USB_SETDEBUG: 629 if (!(flag & FWRITE)) 630 return (EBADF); 631 usbdebug = ((*(int *)data) & 0x000000ff); 632 break; 633 #endif /* USB_DEBUG */ 634 case USB_REQUEST: 635 { 636 struct usb_ctl_request *ur = (void *)data; 637 int len = UGETW(ur->ucr_request.wLength); 638 struct iovec iov; 639 struct uio uio; 640 void *ptr = 0; 641 int addr = ur->ucr_addr; 642 usbd_status err; 643 int error = 0; 644 645 if (!(flag & FWRITE)) 646 return (EBADF); 647 648 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 649 if (len < 0 || len > 32768) 650 return (EINVAL); 651 if (addr < 0 || addr >= USB_MAX_DEVICES || 652 sc->sc_bus->devices[addr] == 0) 653 return (EINVAL); 654 if (len != 0) { 655 iov.iov_base = (void *)ur->ucr_data; 656 iov.iov_len = len; 657 uio.uio_iov = &iov; 658 uio.uio_iovcnt = 1; 659 uio.uio_resid = len; 660 uio.uio_offset = 0; 661 uio.uio_rw = 662 ur->ucr_request.bmRequestType & UT_READ ? 663 UIO_READ : UIO_WRITE; 664 uio.uio_vmspace = l->l_proc->p_vmspace; 665 ptr = malloc(len, M_TEMP, M_WAITOK); 666 if (uio.uio_rw == UIO_WRITE) { 667 error = uiomove(ptr, len, &uio); 668 if (error) 669 goto ret; 670 } 671 } 672 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 673 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 674 USBD_DEFAULT_TIMEOUT); 675 if (err) { 676 error = EIO; 677 goto ret; 678 } 679 if (len > ur->ucr_actlen) 680 len = ur->ucr_actlen; 681 if (len != 0) { 682 if (uio.uio_rw == UIO_READ) { 683 error = uiomove(ptr, len, &uio); 684 if (error) 685 goto ret; 686 } 687 } 688 ret: 689 if (ptr) 690 free(ptr, M_TEMP); 691 return (error); 692 } 693 694 case USB_DEVICEINFO: 695 { 696 usbd_device_handle dev; 697 struct usb_device_info *di = (void *)data; 698 int addr = di->udi_addr; 699 700 if (addr < 1 || addr >= USB_MAX_DEVICES) 701 return EINVAL; 702 if ((dev = sc->sc_bus->devices[addr]) == NULL) 703 return ENXIO; 704 usbd_fill_deviceinfo(dev, di, 1); 705 break; 706 } 707 708 #ifdef COMPAT_30 709 case USB_DEVICEINFO_OLD: 710 { 711 usbd_device_handle dev; 712 struct usb_device_info_old *di = (void *)data; 713 int addr = di->udi_addr; 714 715 if (addr < 1 || addr >= USB_MAX_DEVICES) 716 return EINVAL; 717 if ((dev = sc->sc_bus->devices[addr]) == NULL) 718 return ENXIO; 719 usbd_fill_deviceinfo_old(dev, di, 1); 720 break; 721 } 722 #endif 723 724 case USB_DEVICESTATS: 725 *(struct usb_device_stats *)data = sc->sc_bus->stats; 726 break; 727 728 default: 729 return (EINVAL); 730 } 731 return (0); 732 } 733 734 int 735 usbpoll(dev_t dev, int events, struct lwp *l) 736 { 737 int revents, mask; 738 739 if (minor(dev) == USB_DEV_MINOR) { 740 revents = 0; 741 mask = POLLIN | POLLRDNORM; 742 743 mutex_enter(&usb_event_lock); 744 if (events & mask && usb_nevents > 0) 745 revents |= events & mask; 746 if (revents == 0 && events & mask) 747 selrecord(l, &usb_selevent); 748 mutex_exit(&usb_event_lock); 749 750 return (revents); 751 } else { 752 return (0); 753 } 754 } 755 756 static void 757 filt_usbrdetach(struct knote *kn) 758 { 759 760 mutex_enter(&usb_event_lock); 761 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 762 mutex_exit(&usb_event_lock); 763 } 764 765 static int 766 filt_usbread(struct knote *kn, long hint) 767 { 768 769 if (usb_nevents == 0) 770 return (0); 771 772 kn->kn_data = sizeof(struct usb_event); 773 return (1); 774 } 775 776 static const struct filterops usbread_filtops = 777 { 1, NULL, filt_usbrdetach, filt_usbread }; 778 779 int 780 usbkqfilter(dev_t dev, struct knote *kn) 781 { 782 struct klist *klist; 783 784 switch (kn->kn_filter) { 785 case EVFILT_READ: 786 if (minor(dev) != USB_DEV_MINOR) 787 return (1); 788 klist = &usb_selevent.sel_klist; 789 kn->kn_fop = &usbread_filtops; 790 break; 791 792 default: 793 return (EINVAL); 794 } 795 796 kn->kn_hook = NULL; 797 798 mutex_enter(&usb_event_lock); 799 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 800 mutex_exit(&usb_event_lock); 801 802 return (0); 803 } 804 805 /* Explore device tree from the root. */ 806 Static void 807 usb_discover(struct usb_softc *sc) 808 { 809 810 KASSERT(sc->sc_bus->lock == NULL || mutex_owned(sc->sc_bus->lock)); 811 812 DPRINTFN(2,("usb_discover\n")); 813 if (usb_noexplore > 1) 814 return; 815 /* 816 * We need mutual exclusion while traversing the device tree, 817 * but this is guaranteed since this function is only called 818 * from the event thread for the controller. 819 * 820 * Also, we now have sc_bus->lock held for MPSAFE controllers. 821 */ 822 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 823 sc->sc_bus->needs_explore = 0; 824 if (sc->sc_bus->lock) 825 mutex_exit(sc->sc_bus->lock); 826 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 827 if (sc->sc_bus->lock) 828 mutex_enter(sc->sc_bus->lock); 829 } 830 } 831 832 void 833 usb_needs_explore(usbd_device_handle dev) 834 { 835 DPRINTFN(2,("usb_needs_explore\n")); 836 if (dev->bus->lock) 837 mutex_enter(dev->bus->lock); 838 dev->bus->needs_explore = 1; 839 if (dev->bus->lock) { 840 cv_signal(&dev->bus->needs_explore_cv); 841 mutex_exit(dev->bus->lock); 842 } else 843 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 844 } 845 846 void 847 usb_needs_reattach(usbd_device_handle dev) 848 { 849 DPRINTFN(2,("usb_needs_reattach\n")); 850 if (dev->bus->lock) 851 mutex_enter(dev->bus->lock); 852 dev->powersrc->reattach = 1; 853 dev->bus->needs_explore = 1; 854 if (dev->bus->lock) { 855 cv_signal(&dev->bus->needs_explore_cv); 856 mutex_exit(dev->bus->lock); 857 } else 858 wakeup(&dev->bus->needs_explore); /* XXXSMP ok */ 859 } 860 861 /* Called at with usb_event_lock held. */ 862 int 863 usb_get_next_event(struct usb_event *ue) 864 { 865 struct usb_event_q *ueq; 866 867 KASSERT(mutex_owned(&usb_event_lock)); 868 869 if (usb_nevents <= 0) 870 return (0); 871 ueq = SIMPLEQ_FIRST(&usb_events); 872 #ifdef DIAGNOSTIC 873 if (ueq == NULL) { 874 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 875 usb_nevents = 0; 876 return (0); 877 } 878 #endif 879 if (ue) 880 *ue = ueq->ue; 881 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 882 usb_free_event((struct usb_event *)(void *)ueq); 883 usb_nevents--; 884 return (1); 885 } 886 887 void 888 usbd_add_dev_event(int type, usbd_device_handle udev) 889 { 890 struct usb_event *ue = usb_alloc_event(); 891 892 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 893 usb_add_event(type, ue); 894 } 895 896 void 897 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 898 { 899 struct usb_event *ue = usb_alloc_event(); 900 901 ue->u.ue_driver.ue_cookie = udev->cookie; 902 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 903 sizeof ue->u.ue_driver.ue_devname); 904 usb_add_event(type, ue); 905 } 906 907 Static struct usb_event * 908 usb_alloc_event(void) 909 { 910 /* Yes, this is right; we allocate enough so that we can use it later */ 911 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 912 } 913 914 Static void 915 usb_free_event(struct usb_event *uep) 916 { 917 free(uep, M_USBDEV); 918 } 919 920 Static void 921 usb_add_event(int type, struct usb_event *uep) 922 { 923 struct usb_event_q *ueq; 924 struct timeval thetime; 925 926 microtime(&thetime); 927 /* Don't want to wait here with usb_event_lock held */ 928 ueq = (struct usb_event_q *)(void *)uep; 929 ueq->ue = *uep; 930 ueq->ue.ue_type = type; 931 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 932 933 mutex_enter(&usb_event_lock); 934 if (++usb_nevents >= USB_MAX_EVENTS) { 935 /* Too many queued events, drop an old one. */ 936 DPRINTFN(-1,("usb: event dropped\n")); 937 (void)usb_get_next_event(0); 938 } 939 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 940 cv_signal(&usb_event_cv); 941 selnotify(&usb_selevent, 0, 0); 942 if (usb_async_proc != NULL) { 943 kpreempt_disable(); 944 softint_schedule(usb_async_sih); 945 kpreempt_enable(); 946 } 947 mutex_exit(&usb_event_lock); 948 } 949 950 Static void 951 usb_async_intr(void *cookie) 952 { 953 proc_t *proc; 954 955 mutex_enter(proc_lock); 956 if ((proc = usb_async_proc) != NULL) 957 psignal(proc, SIGIO); 958 mutex_exit(proc_lock); 959 } 960 961 Static void 962 usb_soft_intr(void *arg) 963 { 964 usbd_bus_handle bus = arg; 965 966 if (bus->lock) 967 mutex_enter(bus->lock); 968 (*bus->methods->soft_intr)(bus); 969 if (bus->lock) 970 mutex_exit(bus->lock); 971 } 972 973 void 974 usb_schedsoftintr(usbd_bus_handle bus) 975 { 976 977 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); 978 979 if (bus->use_polling) { 980 bus->methods->soft_intr(bus); 981 } else { 982 kpreempt_disable(); 983 softint_schedule(bus->soft); 984 kpreempt_enable(); 985 } 986 } 987 988 int 989 usb_activate(device_t self, enum devact act) 990 { 991 struct usb_softc *sc = device_private(self); 992 993 switch (act) { 994 case DVACT_DEACTIVATE: 995 sc->sc_dying = 1; 996 return 0; 997 default: 998 return EOPNOTSUPP; 999 } 1000 } 1001 1002 void 1003 usb_childdet(device_t self, device_t child) 1004 { 1005 int i; 1006 struct usb_softc *sc = device_private(self); 1007 struct usbd_device *dev; 1008 1009 if ((dev = sc->sc_port.device) == NULL || dev->subdevlen == 0) 1010 return; 1011 1012 for (i = 0; i < dev->subdevlen; i++) 1013 if (dev->subdevs[i] == child) 1014 dev->subdevs[i] = NULL; 1015 } 1016 1017 int 1018 usb_detach(device_t self, int flags) 1019 { 1020 struct usb_softc *sc = device_private(self); 1021 struct usb_event *ue; 1022 int rc; 1023 1024 DPRINTF(("usb_detach: start\n")); 1025 1026 /* Make all devices disconnect. */ 1027 if (sc->sc_port.device != NULL && 1028 (rc = usb_disconnect_port(&sc->sc_port, self, flags)) != 0) 1029 return rc; 1030 1031 pmf_device_deregister(self); 1032 /* Kill off event thread. */ 1033 sc->sc_dying = 1; 1034 while (sc->sc_event_thread != NULL) { 1035 if (sc->sc_bus->lock) { 1036 mutex_enter(sc->sc_bus->lock); 1037 cv_signal(&sc->sc_bus->needs_explore_cv); 1038 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1039 sc->sc_bus->lock, hz * 60); 1040 mutex_exit(sc->sc_bus->lock); 1041 } else { 1042 wakeup(&sc->sc_bus->needs_explore); /* XXXSMP ok */ 1043 tsleep(sc, PWAIT, "usbdet", hz * 60); /* XXXSMP ok */ 1044 } 1045 } 1046 DPRINTF(("usb_detach: event thread dead\n")); 1047 1048 if (sc->sc_bus->soft != NULL) { 1049 softint_disestablish(sc->sc_bus->soft); 1050 sc->sc_bus->soft = NULL; 1051 } 1052 1053 ue = usb_alloc_event(); 1054 ue->u.ue_ctrlr.ue_bus = device_unit(self); 1055 usb_add_event(USB_EVENT_CTRLR_DETACH, ue); 1056 1057 cv_destroy(&sc->sc_bus->needs_explore_cv); 1058 1059 return (0); 1060 } 1061 1062 #ifdef COMPAT_30 1063 Static void 1064 usb_copy_old_devinfo(struct usb_device_info_old *uo, 1065 const struct usb_device_info *ue) 1066 { 1067 const unsigned char *p; 1068 unsigned char *q; 1069 int i, n; 1070 1071 uo->udi_bus = ue->udi_bus; 1072 uo->udi_addr = ue->udi_addr; 1073 uo->udi_cookie = ue->udi_cookie; 1074 for (i = 0, p = (const unsigned char *)ue->udi_product, 1075 q = (unsigned char *)uo->udi_product; 1076 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1077 if (*p < 0x80) 1078 q[i++] = *p; 1079 else { 1080 q[i++] = '?'; 1081 if ((*p & 0xe0) == 0xe0) 1082 p++; 1083 p++; 1084 } 1085 } 1086 q[i] = 0; 1087 1088 for (i = 0, p = ue->udi_vendor, q = uo->udi_vendor; 1089 *p && i < USB_MAX_STRING_LEN - 1; p++) { 1090 if (* p < 0x80) 1091 q[i++] = *p; 1092 else { 1093 q[i++] = '?'; 1094 p++; 1095 if ((*p & 0xe0) == 0xe0) 1096 p++; 1097 } 1098 } 1099 q[i] = 0; 1100 1101 memcpy(uo->udi_release, ue->udi_release, sizeof(uo->udi_release)); 1102 1103 uo->udi_productNo = ue->udi_productNo; 1104 uo->udi_vendorNo = ue->udi_vendorNo; 1105 uo->udi_releaseNo = ue->udi_releaseNo; 1106 uo->udi_class = ue->udi_class; 1107 uo->udi_subclass = ue->udi_subclass; 1108 uo->udi_protocol = ue->udi_protocol; 1109 uo->udi_config = ue->udi_config; 1110 uo->udi_speed = ue->udi_speed; 1111 uo->udi_power = ue->udi_power; 1112 uo->udi_nports = ue->udi_nports; 1113 1114 for (n=0; n<USB_MAX_DEVNAMES; n++) 1115 memcpy(uo->udi_devnames[n], 1116 ue->udi_devnames[n], USB_MAX_DEVNAMELEN); 1117 memcpy(uo->udi_ports, ue->udi_ports, sizeof(uo->udi_ports)); 1118 } 1119 #endif 1120
Indexes created Tue Sep 23 02:09:52 GMT 2025