usb.c revision 1.150
1 /* $NetBSD: usb.c,v 1.150 2014/07/17 18:42:37 riastradh 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 1.150 2014/07/17 18:42:37 riastradh Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_compat_netbsd.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/malloc.h> 50 #include <sys/device.h> 51 #include <sys/kthread.h> 52 #include <sys/proc.h> 53 #include <sys/conf.h> 54 #include <sys/fcntl.h> 55 #include <sys/poll.h> 56 #include <sys/select.h> 57 #include <sys/vnode.h> 58 #include <sys/signalvar.h> 59 #include <sys/intr.h> 60 #include <sys/module.h> 61 #include <sys/mutex.h> 62 #include <sys/bus.h> 63 #include <sys/once.h> 64 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbdi.h> 67 #include <dev/usb/usbdi_util.h> 68 #include <dev/usb/usbdivar.h> 69 #include <dev/usb/usb_verbose.h> 70 #include <dev/usb/usb_quirks.h> 71 72 #define USB_DEV_MINOR 255 73 74 #ifdef USB_DEBUG 75 #define DPRINTF(x) if (usbdebug) printf x 76 #define DPRINTFN(n,x) if (usbdebug>(n)) printf x 77 int usbdebug = 0; 78 /* 79 * 0 - do usual exploration 80 * 1 - do not use timeout exploration 81 * >1 - do no exploration 82 */ 83 int usb_noexplore = 0; 84 #else 85 #define DPRINTF(x) 86 #define DPRINTFN(n,x) 87 #define usb_noexplore 0 88 #endif 89 90 struct usb_softc { 91 #if 0 92 device_t sc_dev; /* base device */ 93 #endif 94 usbd_bus_handle sc_bus; /* USB controller */ 95 struct usbd_port sc_port; /* dummy port for root hub */ 96 97 struct lwp *sc_event_thread; 98 99 char sc_dying; 100 }; 101 102 struct usb_taskq { 103 TAILQ_HEAD(, usb_task) tasks; 104 kmutex_t lock; 105 kcondvar_t cv; 106 struct lwp *task_thread_lwp; 107 const char *name; 108 }; 109 110 static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; 111 112 dev_type_open(usbopen); 113 dev_type_close(usbclose); 114 dev_type_read(usbread); 115 dev_type_ioctl(usbioctl); 116 dev_type_poll(usbpoll); 117 dev_type_kqfilter(usbkqfilter); 118 119 const struct cdevsw usb_cdevsw = { 120 .d_open = usbopen, 121 .d_close = usbclose, 122 .d_read = usbread, 123 .d_write = nowrite, 124 .d_ioctl = usbioctl, 125 .d_stop = nostop, 126 .d_tty = notty, 127 .d_poll = usbpoll, 128 .d_mmap = nommap, 129 .d_kqfilter = usbkqfilter, 130 .d_flag = D_OTHER 131 }; 132 133 Static void usb_discover(struct usb_softc *); 134 Static void usb_create_event_thread(device_t); 135 Static void usb_event_thread(void *); 136 Static void usb_task_thread(void *); 137 138 #define USB_MAX_EVENTS 100 139 struct usb_event_q { 140 struct usb_event ue; 141 SIMPLEQ_ENTRY(usb_event_q) next; 142 }; 143 Static SIMPLEQ_HEAD(, usb_event_q) usb_events = 144 SIMPLEQ_HEAD_INITIALIZER(usb_events); 145 Static int usb_nevents = 0; 146 Static struct selinfo usb_selevent; 147 Static kmutex_t usb_event_lock; 148 Static kcondvar_t usb_event_cv; 149 Static proc_t *usb_async_proc; /* process that wants USB SIGIO */ 150 Static void *usb_async_sih; 151 Static int usb_dev_open = 0; 152 Static struct usb_event *usb_alloc_event(void); 153 Static void usb_free_event(struct usb_event *); 154 Static void usb_add_event(int, struct usb_event *); 155 Static int usb_get_next_event(struct usb_event *); 156 Static void usb_async_intr(void *); 157 Static void usb_soft_intr(void *); 158 159 #ifdef COMPAT_30 160 Static void usb_copy_old_devinfo(struct usb_device_info_old *, const struct usb_device_info *); 161 #endif 162 163 Static const char *usbrev_str[] = USBREV_STR; 164 165 static int usb_match(device_t, cfdata_t, void *); 166 static void usb_attach(device_t, device_t, void *); 167 static int usb_detach(device_t, int); 168 static int usb_activate(device_t, enum devact); 169 static void usb_childdet(device_t, device_t); 170 static int usb_once_init(void); 171 static void usb_doattach(device_t); 172 173 extern struct cfdriver usb_cd; 174 175 CFATTACH_DECL3_NEW(usb, sizeof(struct usb_softc), 176 usb_match, usb_attach, usb_detach, usb_activate, NULL, usb_childdet, 177 DVF_DETACH_SHUTDOWN); 178 179 static const char *taskq_names[] = USB_TASKQ_NAMES; 180 181 int 182 usb_match(device_t parent, cfdata_t match, void *aux) 183 { 184 DPRINTF(("usbd_match\n")); 185 return (UMATCH_GENERIC); 186 } 187 188 void 189 usb_attach(device_t parent, device_t self, void *aux) 190 { 191 static ONCE_DECL(init_control); 192 struct usb_softc *sc = device_private(self); 193 int usbrev; 194 195 sc->sc_bus = aux; 196 usbrev = sc->sc_bus->usbrev; 197 198 aprint_naive("\n"); 199 aprint_normal(": USB revision %s", usbrev_str[usbrev]); 200 switch (usbrev) { 201 case USBREV_1_0: 202 case USBREV_1_1: 203 case USBREV_2_0: 204 break; 205 default: 206 aprint_error(", not supported\n"); 207 sc->sc_dying = 1; 208 return; 209 } 210 aprint_normal("\n"); 211 212 /* XXX we should have our own level */ 213 sc->sc_bus->soft = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 214 usb_soft_intr, sc->sc_bus); 215 if (sc->sc_bus->soft == NULL) { 216 aprint_error("%s: can't register softintr\n", 217 device_xname(self)); 218 sc->sc_dying = 1; 219 return; 220 } 221 222 sc->sc_bus->methods->get_lock(sc->sc_bus, &sc->sc_bus->lock); 223 KASSERT(sc->sc_bus->lock != NULL); 224 225 RUN_ONCE(&init_control, usb_once_init); 226 config_interrupts(self, usb_doattach); 227 } 228 229 static int 230 usb_once_init(void) 231 { 232 struct usb_taskq *taskq; 233 int i; 234 235 selinit(&usb_selevent); 236 mutex_init(&usb_event_lock, MUTEX_DEFAULT, IPL_NONE); 237 cv_init(&usb_event_cv, "usbrea"); 238 239 for (i = 0; i < USB_NUM_TASKQS; i++) { 240 taskq = &usb_taskq[i]; 241 242 TAILQ_INIT(&taskq->tasks); 243 /* 244 * Since USB task methods usb_{add,rem}_task are callable 245 * from any context, we have to make this lock a spinlock. 246 */ 247 mutex_init(&taskq->lock, MUTEX_DEFAULT, IPL_USB); 248 cv_init(&taskq->cv, "usbtsk"); 249 taskq->name = taskq_names[i]; 250 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 251 usb_task_thread, taskq, &taskq->task_thread_lwp, 252 "%s", taskq->name)) { 253 printf("unable to create task thread: %s\n", taskq->name); 254 panic("usb_create_event_thread task"); 255 } 256 /* 257 * XXX we should make sure these threads are alive before 258 * end up using them in usb_doattach(). 259 */ 260 } 261 return 0; 262 } 263 264 static void 265 usb_doattach(device_t self) 266 { 267 struct usb_softc *sc = device_private(self); 268 usbd_device_handle dev; 269 usbd_status err; 270 int speed; 271 struct usb_event *ue; 272 273 DPRINTF(("usbd_doattach\n")); 274 275 sc->sc_bus->usbctl = self; 276 sc->sc_port.power = USB_MAX_POWER; 277 278 switch (sc->sc_bus->usbrev) { 279 case USBREV_1_0: 280 case USBREV_1_1: 281 speed = USB_SPEED_FULL; 282 break; 283 case USBREV_2_0: 284 speed = USB_SPEED_HIGH; 285 break; 286 default: 287 panic("usb_doattach"); 288 } 289 290 cv_init(&sc->sc_bus->needs_explore_cv, "usbevt"); 291 292 ue = usb_alloc_event(); 293 ue->u.ue_ctrlr.ue_bus = device_unit(self); 294 usb_add_event(USB_EVENT_CTRLR_ATTACH, ue); 295 296 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0, 297 &sc->sc_port); 298 if (!err) { 299 dev = sc->sc_port.device; 300 if (dev->hub == NULL) { 301 sc->sc_dying = 1; 302 aprint_error("%s: root device is not a hub\n", 303 device_xname(self)); 304 return; 305 } 306 sc->sc_bus->root_hub = dev; 307 usb_create_event_thread(self); 308 #if 1 309 /* 310 * Turning this code off will delay attachment of USB devices 311 * until the USB event thread is running, which means that 312 * the keyboard will not work until after cold boot. 313 */ 314 if (cold && (device_cfdata(self)->cf_flags & 1)) 315 dev->hub->explore(sc->sc_bus->root_hub); 316 #endif 317 } else { 318 aprint_error("%s: root hub problem, error=%s\n", 319 device_xname(self), usbd_errstr(err)); 320 sc->sc_dying = 1; 321 } 322 323 config_pending_incr(self); 324 325 if (!pmf_device_register(self, NULL, NULL)) 326 aprint_error_dev(self, "couldn't establish power handler\n"); 327 328 usb_async_sih = softint_establish(SOFTINT_CLOCK | SOFTINT_MPSAFE, 329 usb_async_intr, NULL); 330 331 return; 332 } 333 334 void 335 usb_create_event_thread(device_t self) 336 { 337 struct usb_softc *sc = device_private(self); 338 339 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 340 usb_event_thread, sc, &sc->sc_event_thread, 341 "%s", device_xname(self))) { 342 printf("%s: unable to create event thread for\n", 343 device_xname(self)); 344 panic("usb_create_event_thread"); 345 } 346 } 347 348 /* 349 * Add a task to be performed by the task thread. This function can be 350 * called from any context and the task will be executed in a process 351 * context ASAP. 352 */ 353 void 354 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) 355 { 356 struct usb_taskq *taskq; 357 358 KASSERT(0 <= queue); 359 KASSERT(queue < USB_NUM_TASKQS); 360 taskq = &usb_taskq[queue]; 361 mutex_enter(&taskq->lock); 362 if (atomic_cas_uint(&task->queue, USB_NUM_TASKQS, queue) == 363 USB_NUM_TASKQS) { 364 DPRINTFN(2,("usb_add_task: task=%p\n", task)); 365 TAILQ_INSERT_TAIL(&taskq->tasks, task, next); 366 task->queue = queue; 367 cv_signal(&taskq->cv); 368 } else { 369 DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); 370 } 371 mutex_exit(&taskq->lock); 372 } 373 374 /* 375 * XXX This does not wait for completion! Most uses need such an 376 * operation. Urgh... 377 */ 378 void 379 usb_rem_task(usbd_device_handle dev, struct usb_task *task) 380 { 381 unsigned queue; 382 383 while ((queue = task->queue) != USB_NUM_TASKQS) { 384 struct usb_taskq *taskq = &usb_taskq[queue]; 385 mutex_enter(&taskq->lock); 386 if (__predict_true(task->queue == queue)) { 387 TAILQ_REMOVE(&taskq->tasks, task, next); 388 task->queue = USB_NUM_TASKQS; 389 mutex_exit(&taskq->lock); 390 break; 391 } 392 mutex_exit(&taskq->lock); 393 } 394 } 395 396 void 397 usb_event_thread(void *arg) 398 { 399 struct usb_softc *sc = arg; 400 401 DPRINTF(("usb_event_thread: start\n")); 402 403 /* 404 * In case this controller is a companion controller to an 405 * EHCI controller we need to wait until the EHCI controller 406 * has grabbed the port. 407 * XXX It would be nicer to do this with a tsleep(), but I don't 408 * know how to synchronize the creation of the threads so it 409 * will work. 410 */ 411 usb_delay_ms(sc->sc_bus, 500); 412 413 /* Make sure first discover does something. */ 414 mutex_enter(sc->sc_bus->lock); 415 sc->sc_bus->needs_explore = 1; 416 usb_discover(sc); 417 mutex_exit(sc->sc_bus->lock); 418 config_pending_decr(sc->sc_bus->usbctl); 419 420 mutex_enter(sc->sc_bus->lock); 421 while (!sc->sc_dying) { 422 if (usb_noexplore < 2) 423 usb_discover(sc); 424 425 cv_timedwait(&sc->sc_bus->needs_explore_cv, 426 sc->sc_bus->lock, usb_noexplore ? 0 : hz * 60); 427 428 DPRINTFN(2,("usb_event_thread: woke up\n")); 429 } 430 sc->sc_event_thread = NULL; 431 432 /* In case parent is waiting for us to exit. */ 433 cv_signal(&sc->sc_bus->needs_explore_cv); 434 mutex_exit(sc->sc_bus->lock); 435 436 DPRINTF(("usb_event_thread: exit\n")); 437 kthread_exit(0); 438 } 439 440 void 441 usb_task_thread(void *arg) 442 { 443 struct usb_task *task; 444 struct usb_taskq *taskq; 445 446 taskq = arg; 447 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); 448 449 mutex_enter(&taskq->lock); 450 for (;;) { 451 task = TAILQ_FIRST(&taskq->tasks); 452 if (task == NULL) { 453 cv_wait(&taskq->cv, &taskq->lock); 454 task = TAILQ_FIRST(&taskq->tasks); 455 } 456 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); 457 if (task != NULL) { 458 TAILQ_REMOVE(&taskq->tasks, task, next); 459 task->queue = USB_NUM_TASKQS; 460 mutex_exit(&taskq->lock); 461 462 if (!(task->flags & USB_TASKQ_MPSAFE)) 463 KERNEL_LOCK(1, curlwp); 464 task->fun(task->arg); 465 if (!(task->flags & USB_TASKQ_MPSAFE)) 466 KERNEL_UNLOCK_ONE(curlwp); 467 468 mutex_enter(&taskq->lock); 469 } 470 } 471 mutex_exit(&taskq->lock); 472 } 473 474 int 475 usbctlprint(void *aux, const char *pnp) 476 { 477 /* only "usb"es can attach to host controllers */ 478 if (pnp) 479 aprint_normal("usb at %s", pnp); 480 481 return (UNCONF); 482 } 483 484 int 485 usbopen(dev_t dev, int flag, int mode, struct lwp *l) 486 { 487 int unit = minor(dev); 488 struct usb_softc *sc; 489 490 if (unit == USB_DEV_MINOR) { 491 if (usb_dev_open) 492 return (EBUSY); 493 usb_dev_open = 1; 494 mutex_enter(proc_lock); 495 usb_async_proc = 0; 496 mutex_exit(proc_lock); 497 return (0); 498 } 499 500 sc = device_lookup_private(&usb_cd, unit); 501 if (!sc) 502 return (ENXIO); 503 504 if (sc->sc_dying) 505 return (EIO); 506 507 return (0); 508 } 509 510 int 511 usbread(dev_t dev, struct uio *uio, int flag) 512 { 513 struct usb_event *ue; 514 #ifdef COMPAT_30 515 struct usb_event_old *ueo = NULL; /* XXXGCC */ 516 int useold = 0; 517 #endif 518 int error, n; 519 520 if (minor(dev) != USB_DEV_MINOR) 521 return (ENXIO); 522 523 switch (uio->uio_resid) { 524 #ifdef COMPAT_30 525 case sizeof(struct usb_event_old): 526 ueo = malloc(sizeof(struct usb_event_old), M_USBDEV, 527 M_WAITOK|M_ZERO); 528 useold = 1; 529 /* FALLTHRU */ 530 #endif 531 case sizeof(struct usb_event): 532 ue = usb_alloc_event(); 533 break; 534 default: 535 return (EINVAL); 536 } 537 538 error = 0; 539 mutex_enter(&usb_event_lock); 540 for (;;) { 541 n = usb_get_next_event(ue); 542 if (n != 0) 543 break; 544 if (flag & IO_NDELAY) { 545 error = EWOULDBLOCK; 546 break; 547 } 548 error = cv_wait_sig(&usb_event_cv, &usb_event_lock); 549 if (error) 550 break; 551 } 552 mutex_exit(&usb_event_lock); 553 if (!error) { 554 #ifdef COMPAT_30 555 if (useold) { /* copy fields to old struct */ 556 ueo->ue_type = ue->ue_type; 557 memcpy(&ueo->ue_time, &ue->ue_time, 558 sizeof(struct timespec)); 559 switch (ue->ue_type) { 560 case USB_EVENT_DEVICE_ATTACH: 561 case USB_EVENT_DEVICE_DETACH: 562 usb_copy_old_devinfo(&ueo->u.ue_device, &ue->u.ue_device); 563 break; 564 565 case USB_EVENT_CTRLR_ATTACH: 566 case USB_EVENT_CTRLR_DETACH: 567 ueo->u.ue_ctrlr.ue_bus=ue->u.ue_ctrlr.ue_bus; 568 break; 569 570 case USB_EVENT_DRIVER_ATTACH: 571 case USB_EVENT_DRIVER_DETACH: 572 ueo->u.ue_driver.ue_cookie=ue->u.ue_driver.ue_cookie; 573 memcpy(ueo->u.ue_driver.ue_devname, 574 ue->u.ue_driver.ue_devname, 575 sizeof(ue->u.ue_driver.ue_devname)); 576 break; 577 default: 578 ; 579 } 580 581 error = uiomove((void *)ueo, sizeof *ueo, uio); 582 } else 583 #endif 584 error = uiomove((void *)ue, sizeof *ue, uio); 585 } 586 usb_free_event(ue); 587 #ifdef COMPAT_30 588 if (useold) 589 free(ueo, M_USBDEV); 590 #endif 591 592 return (error); 593 } 594 595 int 596 usbclose(dev_t dev, int flag, int mode, 597 struct lwp *l) 598 { 599 int unit = minor(dev); 600 601 if (unit == USB_DEV_MINOR) { 602 mutex_enter(proc_lock); 603 usb_async_proc = 0; 604 mutex_exit(proc_lock); 605 usb_dev_open = 0; 606 } 607 608 return (0); 609 } 610 611 int 612 usbioctl(dev_t devt, u_long cmd, void *data, int flag, struct lwp *l) 613 { 614 struct usb_softc *sc; 615 int unit = minor(devt); 616 617 if (unit == USB_DEV_MINOR) { 618 switch (cmd) { 619 case FIONBIO: 620 /* All handled in the upper FS layer. */ 621 return (0); 622 623 case FIOASYNC: 624 mutex_enter(proc_lock); 625 if (*(int *)data) 626 usb_async_proc = l->l_proc; 627 else 628 usb_async_proc = 0; 629 mutex_exit(proc_lock); 630 return (0); 631 632 default: 633 return (EINVAL); 634 } 635 } 636 637 sc = device_lookup_private(&usb_cd, unit); 638 639 if (sc->sc_dying) 640 return (EIO); 641 642 switch (cmd) { 643 #ifdef USB_DEBUG 644 case USB_SETDEBUG: 645 if (!(flag & FWRITE)) 646 return (EBADF); 647 usbdebug = ((*(int *)data) & 0x000000ff); 648 break; 649 #endif /* USB_DEBUG */ 650 case USB_REQUEST: 651 { 652 struct usb_ctl_request *ur = (void *)data; 653 int len = UGETW(ur->ucr_request.wLength); 654 struct iovec iov; 655 struct uio uio; 656 void *ptr = 0; 657 int addr = ur->ucr_addr; 658 usbd_status err; 659 int error = 0; 660 661 if (!(flag & FWRITE)) 662 return (EBADF); 663 664 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); 665 if (len < 0 || len > 32768) 666 return (EINVAL); 667 if (addr < 0 || addr >= USB_MAX_DEVICES || 668 sc->sc_bus->devices[addr] == NULL) 669 return (EINVAL); 670 if (len != 0) { 671 iov.iov_base = (void *)ur->ucr_data; 672 iov.iov_len = len; 673 uio.uio_iov = &iov; 674 uio.uio_iovcnt = 1; 675 uio.uio_resid = len; 676 uio.uio_offset = 0; 677 uio.uio_rw = 678 ur->ucr_request.bmRequestType & UT_READ ? 679 UIO_READ : UIO_WRITE; 680 uio.uio_vmspace = l->l_proc->p_vmspace; 681 ptr = malloc(len, M_TEMP, M_WAITOK); 682 if (uio.uio_rw == UIO_WRITE) { 683 error = uiomove(ptr, len, &uio); 684 if (error) 685 goto ret; 686 } 687 } 688 err = usbd_do_request_flags(sc->sc_bus->devices[addr], 689 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, 690 USBD_DEFAULT_TIMEOUT); 691 if (err) { 692 error = EIO; 693 goto ret; 694 } 695 if (len > ur->ucr_actlen) 696 len = ur->ucr_actlen; 697 if (len != 0) { 698 if (uio.uio_rw == UIO_READ) { 699 error = uiomove(ptr, len, &uio); 700 if (error) 701 goto ret; 702 } 703 } 704 ret: 705 if (ptr) 706 free(ptr, M_TEMP); 707 return (error); 708 } 709 710 case USB_DEVICEINFO: 711 { 712 usbd_device_handle dev; 713 struct usb_device_info *di = (void *)data; 714 int addr = di->udi_addr; 715 716 if (addr < 0 || addr >= USB_MAX_DEVICES) 717 return EINVAL; 718 if ((dev = sc->sc_bus->devices[addr]) == NULL) 719 return ENXIO; 720 usbd_fill_deviceinfo(dev, di, 1); 721 break; 722 } 723 724 #ifdef COMPAT_30 725 case USB_DEVICEINFO_OLD: 726 { 727 usbd_device_handle dev; 728 struct usb_device_info_old *di = (void *)data; 729 int addr = di->udi_addr; 730 731 if (addr < 1 || addr >= USB_MAX_DEVICES) 732 return EINVAL; 733 if ((dev = sc->sc_bus->devices[addr]) == NULL) 734 return ENXIO; 735 usbd_fill_deviceinfo_old(dev, di, 1); 736 break; 737 } 738 #endif 739 740 case USB_DEVICESTATS: 741 *(struct usb_device_stats *)data = sc->sc_bus->stats; 742 break; 743 744 default: 745 return (EINVAL); 746 } 747 return (0); 748 } 749 750 int 751 usbpoll(dev_t dev, int events, struct lwp *l) 752 { 753 int revents, mask; 754 755 if (minor(dev) == USB_DEV_MINOR) { 756 revents = 0; 757 mask = POLLIN | POLLRDNORM; 758 759 mutex_enter(&usb_event_lock); 760 if (events & mask && usb_nevents > 0) 761 revents |= events & mask; 762 if (revents == 0 && events & mask) 763 selrecord(l, &usb_selevent); 764 mutex_exit(&usb_event_lock); 765 766 return (revents); 767 } else { 768 return (0); 769 } 770 } 771 772 static void 773 filt_usbrdetach(struct knote *kn) 774 { 775 776 mutex_enter(&usb_event_lock); 777 SLIST_REMOVE(&usb_selevent.sel_klist, kn, knote, kn_selnext); 778 mutex_exit(&usb_event_lock); 779 } 780 781 static int 782 filt_usbread(struct knote *kn, long hint) 783 { 784 785 if (usb_nevents == 0) 786 return (0); 787 788 kn->kn_data = sizeof(struct usb_event); 789 return (1); 790 } 791 792 static const struct filterops usbread_filtops = 793 { 1, NULL, filt_usbrdetach, filt_usbread }; 794 795 int 796 usbkqfilter(dev_t dev, struct knote *kn) 797 { 798 struct klist *klist; 799 800 switch (kn->kn_filter) { 801 case EVFILT_READ: 802 if (minor(dev) != USB_DEV_MINOR) 803 return (1); 804 klist = &usb_selevent.sel_klist; 805 kn->kn_fop = &usbread_filtops; 806 break; 807 808 default: 809 return (EINVAL); 810 } 811 812 kn->kn_hook = NULL; 813 814 mutex_enter(&usb_event_lock); 815 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 816 mutex_exit(&usb_event_lock); 817 818 return (0); 819 } 820 821 /* Explore device tree from the root. */ 822 Static void 823 usb_discover(struct usb_softc *sc) 824 { 825 826 KASSERT(mutex_owned(sc->sc_bus->lock)); 827 828 DPRINTFN(2,("usb_discover\n")); 829 if (usb_noexplore > 1) 830 return; 831 /* 832 * We need mutual exclusion while traversing the device tree, 833 * but this is guaranteed since this function is only called 834 * from the event thread for the controller. 835 * 836 * Also, we now have sc_bus->lock held. 837 */ 838 while (sc->sc_bus->needs_explore && !sc->sc_dying) { 839 sc->sc_bus->needs_explore = 0; 840 mutex_exit(sc->sc_bus->lock); 841 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); 842 mutex_enter(sc->sc_bus->lock); 843 } 844 } 845 846 void 847 usb_needs_explore(usbd_device_handle dev) 848 { 849 DPRINTFN(2,("usb_needs_explore\n")); 850 mutex_enter(dev->bus->lock); 851 dev->bus->needs_explore = 1; 852 cv_signal(&dev->bus->needs_explore_cv); 853 mutex_exit(dev->bus->lock); 854 } 855 856 void 857 usb_needs_reattach(usbd_device_handle dev) 858 { 859 DPRINTFN(2,("usb_needs_reattach\n")); 860 mutex_enter(dev->bus->lock); 861 dev->powersrc->reattach = 1; 862 dev->bus->needs_explore = 1; 863 cv_signal(&dev->bus->needs_explore_cv); 864 mutex_exit(dev->bus->lock); 865 } 866 867 /* Called at with usb_event_lock held. */ 868 int 869 usb_get_next_event(struct usb_event *ue) 870 { 871 struct usb_event_q *ueq; 872 873 KASSERT(mutex_owned(&usb_event_lock)); 874 875 if (usb_nevents <= 0) 876 return (0); 877 ueq = SIMPLEQ_FIRST(&usb_events); 878 #ifdef DIAGNOSTIC 879 if (ueq == NULL) { 880 printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); 881 usb_nevents = 0; 882 return (0); 883 } 884 #endif 885 if (ue) 886 *ue = ueq->ue; 887 SIMPLEQ_REMOVE_HEAD(&usb_events, next); 888 usb_free_event((struct usb_event *)(void *)ueq); 889 usb_nevents--; 890 return (1); 891 } 892 893 void 894 usbd_add_dev_event(int type, usbd_device_handle udev) 895 { 896 struct usb_event *ue = usb_alloc_event(); 897 898 usbd_fill_deviceinfo(udev, &ue->u.ue_device, USB_EVENT_IS_ATTACH(type)); 899 usb_add_event(type, ue); 900 } 901 902 void 903 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) 904 { 905 struct usb_event *ue = usb_alloc_event(); 906 907 ue->u.ue_driver.ue_cookie = udev->cookie; 908 strncpy(ue->u.ue_driver.ue_devname, device_xname(dev), 909 sizeof ue->u.ue_driver.ue_devname); 910 usb_add_event(type, ue); 911 } 912 913 Static struct usb_event * 914 usb_alloc_event(void) 915 { 916 /* Yes, this is right; we allocate enough so that we can use it later */ 917 return malloc(sizeof(struct usb_event_q), M_USBDEV, M_WAITOK|M_ZERO); 918 } 919 920 Static void 921 usb_free_event(struct usb_event *uep) 922 { 923 free(uep, M_USBDEV); 924 } 925 926 Static void 927 usb_add_event(int type, struct usb_event *uep) 928 { 929 struct usb_event_q *ueq; 930 struct timeval thetime; 931 932 microtime(&thetime); 933 /* Don't want to wait here with usb_event_lock held */ 934 ueq = (struct usb_event_q *)(void *)uep; 935 ueq->ue = *uep; 936 ueq->ue.ue_type = type; 937 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 938 939 mutex_enter(&usb_event_lock); 940 if (++usb_nevents >= USB_MAX_EVENTS) { 941 /* Too many queued events, drop an old one. */ 942 DPRINTFN(-1,("usb: event dropped\n")); 943 (void)usb_get_next_event(0); 944 } 945 SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); 946 cv_signal(&usb_event_cv); 947 selnotify(&usb_selevent, 0, 0); 948 if (usb_async_proc != NULL) { 949 kpreempt_disable(); 950 softint_schedule(usb_async_sih); 951 kpreempt_enable(); 952 } 953 mutex_exit(&usb_event_lock); 954 } 955 956 Static void 957 usb_async_intr(void *cookie) 958 { 959 proc_t *proc; 960 961 mutex_enter(proc_lock); 962 if ((proc = usb_async_proc) != NULL) 963 psignal(proc, SIGIO); 964 mutex_exit(proc_lock); 965 } 966 967 Static void 968 usb_soft_intr(void *arg) 969 { 970 usbd_bus_handle bus = arg; 971 972 mutex_enter(bus->lock); 973 (*bus->methods->soft_intr)(bus); 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 mutex_enter(sc->sc_bus->lock); 1040 cv_signal(&sc->sc_bus->needs_explore_cv); 1041 cv_timedwait(&sc->sc_bus->needs_explore_cv, 1042 sc->sc_bus->lock, hz * 60); 1043 mutex_exit(sc->sc_bus->lock); 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 23:09:58 GMT 2025