Annotation of sys/dev/usb/usb.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: usb.c,v 1.56 2007/06/15 11:41:48 mbalmer Exp $ */
! 2: /* $NetBSD: usb.c,v 1.77 2003/01/01 00:10:26 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Lennart Augustsson (lennart@augustsson.net) at
! 10: * Carlstedt Research & Technology.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * USB specifications and other documentation can be found at
! 43: * http://www.usb.org/developers/docs/ and
! 44: * http://www.usb.org/developers/devclass_docs/
! 45: */
! 46:
! 47: #include "ohci.h"
! 48: #include "uhci.h"
! 49:
! 50: #include <sys/param.h>
! 51: #include <sys/systm.h>
! 52: #include <sys/kernel.h>
! 53: #include <sys/malloc.h>
! 54: #include <sys/device.h>
! 55: #include <sys/kthread.h>
! 56: #include <sys/proc.h>
! 57: #include <sys/conf.h>
! 58: #include <sys/fcntl.h>
! 59: #include <sys/poll.h>
! 60: #include <sys/selinfo.h>
! 61: #include <sys/vnode.h>
! 62: #include <sys/signalvar.h>
! 63:
! 64: #include <dev/usb/usb.h>
! 65: #include <dev/usb/usbdi.h>
! 66: #include <dev/usb/usbdi_util.h>
! 67:
! 68: #define USB_DEV_MINOR 255
! 69:
! 70: #include <machine/bus.h>
! 71:
! 72: #include <dev/usb/usbdivar.h>
! 73: #include <dev/usb/usb_quirks.h>
! 74:
! 75: #ifdef USB_DEBUG
! 76: #define DPRINTF(x) do { if (usbdebug) printf x; } while (0)
! 77: #define DPRINTFN(n,x) do { if (usbdebug>(n)) printf x; } while (0)
! 78: int usbdebug = 0;
! 79: #if defined(UHCI_DEBUG) && NUHCI > 0
! 80: extern int uhcidebug;
! 81: #endif
! 82: #if defined(OHCI_DEBUG) && NOHCI > 0
! 83: extern int ohcidebug;
! 84: #endif
! 85: /*
! 86: * 0 - do usual exploration
! 87: * 1 - do not use timeout exploration
! 88: * >1 - do no exploration
! 89: */
! 90: int usb_noexplore = 0;
! 91: #else
! 92: #define DPRINTF(x)
! 93: #define DPRINTFN(n,x)
! 94: #endif
! 95:
! 96: struct usb_softc {
! 97: struct device sc_dev; /* base device */
! 98: usbd_bus_handle sc_bus; /* USB controller */
! 99: struct usbd_port sc_port; /* dummy port for root hub */
! 100:
! 101: struct proc *sc_event_thread;
! 102:
! 103: char sc_dying;
! 104: };
! 105:
! 106: TAILQ_HEAD(, usb_task) usb_all_tasks;
! 107:
! 108: volatile int threads_pending = 0;
! 109:
! 110: void usb_discover(void *);
! 111: void usb_create_event_thread(void *);
! 112: void usb_event_thread(void *);
! 113: void usb_task_thread(void *);
! 114: struct proc *usb_task_thread_proc = NULL;
! 115:
! 116: #define USB_MAX_EVENTS 100
! 117: struct usb_event_q {
! 118: struct usb_event ue;
! 119: SIMPLEQ_ENTRY(usb_event_q) next;
! 120: };
! 121: SIMPLEQ_HEAD(, usb_event_q) usb_events =
! 122: SIMPLEQ_HEAD_INITIALIZER(usb_events);
! 123: int usb_nevents = 0;
! 124: struct selinfo usb_selevent;
! 125: struct proc *usb_async_proc; /* process that wants USB SIGIO */
! 126: int usb_dev_open = 0;
! 127: void usb_add_event(int, struct usb_event *);
! 128:
! 129: int usb_get_next_event(struct usb_event *);
! 130:
! 131: const char *usbrev_str[] = USBREV_STR;
! 132:
! 133: int usb_match(struct device *, void *, void *);
! 134: void usb_attach(struct device *, struct device *, void *);
! 135: int usb_detach(struct device *, int);
! 136: int usb_activate(struct device *, enum devact);
! 137:
! 138: struct cfdriver usb_cd = {
! 139: NULL, "usb", DV_DULL
! 140: };
! 141:
! 142: const struct cfattach usb_ca = {
! 143: sizeof(struct usb_softc),
! 144: usb_match,
! 145: usb_attach,
! 146: usb_detach,
! 147: usb_activate,
! 148: };
! 149:
! 150: int
! 151: usb_match(struct device *parent, void *match, void *aux)
! 152: {
! 153: DPRINTF(("usbd_match\n"));
! 154: return (UMATCH_GENERIC);
! 155: }
! 156:
! 157: void
! 158: usb_attach(struct device *parent, struct device *self, void *aux)
! 159: {
! 160: struct usb_softc *sc = (struct usb_softc *)self;
! 161: usbd_device_handle dev;
! 162: usbd_status err;
! 163: int usbrev;
! 164: int speed;
! 165: struct usb_event ue;
! 166:
! 167: DPRINTF(("usbd_attach\n"));
! 168:
! 169: usbd_init();
! 170: sc->sc_bus = aux;
! 171: sc->sc_bus->usbctl = sc;
! 172: sc->sc_port.power = USB_MAX_POWER;
! 173:
! 174: usbrev = sc->sc_bus->usbrev;
! 175: printf(": USB revision %s", usbrev_str[usbrev]);
! 176: switch (usbrev) {
! 177: case USBREV_1_0:
! 178: case USBREV_1_1:
! 179: speed = USB_SPEED_FULL;
! 180: break;
! 181: case USBREV_2_0:
! 182: speed = USB_SPEED_HIGH;
! 183: break;
! 184: default:
! 185: printf(", not supported\n");
! 186: sc->sc_dying = 1;
! 187: return;
! 188: }
! 189: printf("\n");
! 190:
! 191: /* Make sure not to use tsleep() if we are cold booting. */
! 192: if (cold)
! 193: sc->sc_bus->use_polling++;
! 194:
! 195: ue.u.ue_ctrlr.ue_bus = sc->sc_dev.dv_unit;
! 196: usb_add_event(USB_EVENT_CTRLR_ATTACH, &ue);
! 197:
! 198: #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
! 199: /* XXX we should have our own level */
! 200: sc->sc_bus->soft = softintr_establish(IPL_SOFTNET,
! 201: sc->sc_bus->methods->soft_intr, sc->sc_bus);
! 202: if (sc->sc_bus->soft == NULL) {
! 203: printf("%s: can't register softintr\n", sc->sc_dev.dv_xname);
! 204: sc->sc_dying = 1;
! 205: return;
! 206: }
! 207: #endif
! 208:
! 209: err = usbd_new_device(&sc->sc_dev, sc->sc_bus, 0, speed, 0,
! 210: &sc->sc_port);
! 211: if (!err) {
! 212: dev = sc->sc_port.device;
! 213: if (dev->hub == NULL) {
! 214: sc->sc_dying = 1;
! 215: printf("%s: root device is not a hub\n",
! 216: sc->sc_dev.dv_xname);
! 217: return;
! 218: }
! 219: sc->sc_bus->root_hub = dev;
! 220: #if 1
! 221: /*
! 222: * Turning this code off will delay attachment of USB devices
! 223: * until the USB event thread is running, which means that
! 224: * the keyboard will not work until after cold boot.
! 225: */
! 226: if (cold && (sc->sc_dev.dv_cfdata->cf_flags & 1))
! 227: dev->hub->explore(sc->sc_bus->root_hub);
! 228: #endif
! 229: } else {
! 230: printf("%s: root hub problem, error=%d\n",
! 231: sc->sc_dev.dv_xname, err);
! 232: sc->sc_dying = 1;
! 233: }
! 234: if (cold)
! 235: sc->sc_bus->use_polling--;
! 236:
! 237: config_pending_incr();
! 238: kthread_create_deferred(usb_create_event_thread, sc);
! 239: }
! 240:
! 241: void
! 242: usb_create_event_thread(void *arg)
! 243: {
! 244: struct usb_softc *sc = arg;
! 245: static int created = 0;
! 246:
! 247: if (sc->sc_bus->usbrev == USBREV_2_0)
! 248: threads_pending++;
! 249:
! 250: if (kthread_create(usb_event_thread, sc, &sc->sc_event_thread,
! 251: "%s", sc->sc_dev.dv_xname))
! 252: panic("unable to create event thread for %s",
! 253: sc->sc_dev.dv_xname);
! 254:
! 255: if (!created) {
! 256: created = 1;
! 257: TAILQ_INIT(&usb_all_tasks);
! 258: if (kthread_create(usb_task_thread, NULL,
! 259: &usb_task_thread_proc, "usbtask"))
! 260: panic("unable to create usb task thread");
! 261: }
! 262: }
! 263:
! 264: /*
! 265: * Add a task to be performed by the task thread. This function can be
! 266: * called from any context and the task will be executed in a process
! 267: * context ASAP.
! 268: */
! 269: void
! 270: usb_add_task(usbd_device_handle dev, struct usb_task *task)
! 271: {
! 272: int s;
! 273:
! 274: s = splusb();
! 275: if (!task->onqueue) {
! 276: DPRINTFN(2,("usb_add_task: task=%p\n", task));
! 277: TAILQ_INSERT_TAIL(&usb_all_tasks, task, next);
! 278: task->onqueue = 1;
! 279: } else {
! 280: DPRINTFN(3,("usb_add_task: task=%p on q\n", task));
! 281: }
! 282: wakeup(&usb_all_tasks);
! 283: splx(s);
! 284: }
! 285:
! 286: void
! 287: usb_rem_task(usbd_device_handle dev, struct usb_task *task)
! 288: {
! 289: int s;
! 290:
! 291: s = splusb();
! 292: if (task->onqueue) {
! 293: TAILQ_REMOVE(&usb_all_tasks, task, next);
! 294: task->onqueue = 0;
! 295: }
! 296: splx(s);
! 297: }
! 298:
! 299: void
! 300: usb_event_thread(void *arg)
! 301: {
! 302: struct usb_softc *sc = arg;
! 303: int pwrdly;
! 304:
! 305: DPRINTF(("usb_event_thread: start\n"));
! 306:
! 307: /* Wait for power to come good. */
! 308: pwrdly = sc->sc_bus->root_hub->hub->hubdesc.bPwrOn2PwrGood *
! 309: UHD_PWRON_FACTOR + USB_EXTRA_POWER_UP_TIME;
! 310: usb_delay_ms(sc->sc_bus, pwrdly);
! 311:
! 312: /* USB1 threads wait for USB2 threads to finish their first probe. */
! 313: while (sc->sc_bus->usbrev != USBREV_2_0 && threads_pending)
! 314: (void)tsleep((void *)&threads_pending, PWAIT, "config", 0);
! 315:
! 316: /* Make sure first discover does something. */
! 317: sc->sc_bus->needs_explore = 1;
! 318: usb_discover(sc);
! 319: config_pending_decr();
! 320:
! 321: /* Wake up any companions waiting for handover before their probes. */
! 322: if (sc->sc_bus->usbrev == USBREV_2_0) {
! 323: threads_pending--;
! 324: wakeup((void *)&threads_pending);
! 325: }
! 326:
! 327: while (!sc->sc_dying) {
! 328: #ifdef USB_DEBUG
! 329: if (usb_noexplore < 2)
! 330: #endif
! 331: usb_discover(sc);
! 332: #ifdef USB_DEBUG
! 333: (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt",
! 334: usb_noexplore ? 0 : hz * 60);
! 335: #else
! 336: (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt",
! 337: hz * 60);
! 338: #endif
! 339: DPRINTFN(2,("usb_event_thread: woke up\n"));
! 340: }
! 341: sc->sc_event_thread = NULL;
! 342:
! 343: /* In case parent is waiting for us to exit. */
! 344: wakeup(sc);
! 345:
! 346: DPRINTF(("usb_event_thread: exit\n"));
! 347: kthread_exit(0);
! 348: }
! 349:
! 350: void
! 351: usb_task_thread(void *arg)
! 352: {
! 353: struct usb_task *task;
! 354: int s;
! 355:
! 356: DPRINTF(("usb_task_thread: start\n"));
! 357:
! 358: s = splusb();
! 359: for (;;) {
! 360: task = TAILQ_FIRST(&usb_all_tasks);
! 361: if (task == NULL) {
! 362: tsleep(&usb_all_tasks, PWAIT, "usbtsk", 0);
! 363: task = TAILQ_FIRST(&usb_all_tasks);
! 364: }
! 365: DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task));
! 366: if (task != NULL) {
! 367: TAILQ_REMOVE(&usb_all_tasks, task, next);
! 368: task->onqueue = 0;
! 369: splx(s);
! 370: task->fun(task->arg);
! 371: s = splusb();
! 372: }
! 373: }
! 374: }
! 375:
! 376: int
! 377: usbctlprint(void *aux, const char *pnp)
! 378: {
! 379: /* only "usb"es can attach to host controllers */
! 380: if (pnp)
! 381: printf("usb at %s", pnp);
! 382:
! 383: return (UNCONF);
! 384: }
! 385:
! 386: int
! 387: usbopen(dev_t dev, int flag, int mode, struct proc *p)
! 388: {
! 389: int unit = minor(dev);
! 390: struct usb_softc *sc;
! 391:
! 392: if (unit == USB_DEV_MINOR) {
! 393: if (usb_dev_open)
! 394: return (EBUSY);
! 395: usb_dev_open = 1;
! 396: usb_async_proc = 0;
! 397: return (0);
! 398: }
! 399:
! 400: if (unit >= usb_cd.cd_ndevs)
! 401: return (ENXIO);
! 402: sc = usb_cd.cd_devs[unit];
! 403: if (sc == NULL)
! 404: return (ENXIO);
! 405:
! 406: if (sc->sc_dying)
! 407: return (EIO);
! 408:
! 409: return (0);
! 410: }
! 411:
! 412: int
! 413: usbread(dev_t dev, struct uio *uio, int flag)
! 414: {
! 415: struct usb_event ue;
! 416: int s, error, n;
! 417:
! 418: if (minor(dev) != USB_DEV_MINOR)
! 419: return (ENXIO);
! 420:
! 421: if (uio->uio_resid != sizeof(struct usb_event))
! 422: return (EINVAL);
! 423:
! 424: error = 0;
! 425: s = splusb();
! 426: for (;;) {
! 427: n = usb_get_next_event(&ue);
! 428: if (n != 0)
! 429: break;
! 430: if (flag & IO_NDELAY) {
! 431: error = EWOULDBLOCK;
! 432: break;
! 433: }
! 434: error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0);
! 435: if (error)
! 436: break;
! 437: }
! 438: splx(s);
! 439: if (!error)
! 440: error = uiomove((void *)&ue, uio->uio_resid, uio);
! 441:
! 442: return (error);
! 443: }
! 444:
! 445: int
! 446: usbclose(dev_t dev, int flag, int mode, struct proc *p)
! 447: {
! 448: int unit = minor(dev);
! 449:
! 450: if (unit == USB_DEV_MINOR) {
! 451: usb_async_proc = 0;
! 452: usb_dev_open = 0;
! 453: }
! 454:
! 455: return (0);
! 456: }
! 457:
! 458: int
! 459: usbioctl(dev_t devt, u_long cmd, caddr_t data, int flag, struct proc *p)
! 460: {
! 461: struct usb_softc *sc;
! 462: int unit = minor(devt);
! 463:
! 464: if (unit == USB_DEV_MINOR) {
! 465: switch (cmd) {
! 466: case FIONBIO:
! 467: /* All handled in the upper FS layer. */
! 468: return (0);
! 469:
! 470: case FIOASYNC:
! 471: if (*(int *)data)
! 472: usb_async_proc = p;
! 473: else
! 474: usb_async_proc = 0;
! 475: return (0);
! 476:
! 477: default:
! 478: return (EINVAL);
! 479: }
! 480: }
! 481:
! 482: sc = usb_cd.cd_devs[unit];
! 483:
! 484: if (sc->sc_dying)
! 485: return (EIO);
! 486:
! 487: switch (cmd) {
! 488: #ifdef USB_DEBUG
! 489: case USB_SETDEBUG:
! 490: if (!(flag & FWRITE))
! 491: return (EBADF);
! 492: usbdebug = ((*(int *)data) & 0x000000ff);
! 493: #if defined(UHCI_DEBUG) && NUHCI > 0
! 494: uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8;
! 495: #endif
! 496: #if defined(OHCI_DEBUG) && NOHCI > 0
! 497: ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16;
! 498: #endif
! 499: break;
! 500: #endif /* USB_DEBUG */
! 501: case USB_REQUEST:
! 502: {
! 503: struct usb_ctl_request *ur = (void *)data;
! 504: int len = UGETW(ur->ucr_request.wLength);
! 505: struct iovec iov;
! 506: struct uio uio;
! 507: void *ptr = 0;
! 508: int addr = ur->ucr_addr;
! 509: usbd_status err;
! 510: int error = 0;
! 511:
! 512: if (!(flag & FWRITE))
! 513: return (EBADF);
! 514:
! 515: DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len));
! 516: if (len < 0 || len > 32768)
! 517: return (EINVAL);
! 518: if (addr < 0 || addr >= USB_MAX_DEVICES ||
! 519: sc->sc_bus->devices[addr] == 0)
! 520: return (EINVAL);
! 521: if (len != 0) {
! 522: iov.iov_base = (caddr_t)ur->ucr_data;
! 523: iov.iov_len = len;
! 524: uio.uio_iov = &iov;
! 525: uio.uio_iovcnt = 1;
! 526: uio.uio_resid = len;
! 527: uio.uio_offset = 0;
! 528: uio.uio_segflg = UIO_USERSPACE;
! 529: uio.uio_rw =
! 530: ur->ucr_request.bmRequestType & UT_READ ?
! 531: UIO_READ : UIO_WRITE;
! 532: uio.uio_procp = p;
! 533: ptr = malloc(len, M_TEMP, M_WAITOK);
! 534: if (uio.uio_rw == UIO_WRITE) {
! 535: error = uiomove(ptr, len, &uio);
! 536: if (error)
! 537: goto ret;
! 538: }
! 539: }
! 540: err = usbd_do_request_flags(sc->sc_bus->devices[addr],
! 541: &ur->ucr_request, ptr, ur->ucr_flags,
! 542: &ur->ucr_actlen, USBD_DEFAULT_TIMEOUT);
! 543: if (err) {
! 544: error = EIO;
! 545: goto ret;
! 546: }
! 547: if (len != 0) {
! 548: if (uio.uio_rw == UIO_READ) {
! 549: error = uiomove(ptr, len, &uio);
! 550: if (error)
! 551: goto ret;
! 552: }
! 553: }
! 554: ret:
! 555: if (ptr)
! 556: free(ptr, M_TEMP);
! 557: return (error);
! 558: }
! 559:
! 560: case USB_DEVICEINFO:
! 561: {
! 562: struct usb_device_info *di = (void *)data;
! 563: int addr = di->udi_addr;
! 564: usbd_device_handle dev;
! 565:
! 566: if (addr < 1 || addr >= USB_MAX_DEVICES)
! 567: return (EINVAL);
! 568: dev = sc->sc_bus->devices[addr];
! 569: if (dev == NULL)
! 570: return (ENXIO);
! 571: usbd_fill_deviceinfo(dev, di, 1);
! 572: break;
! 573: }
! 574:
! 575: case USB_DEVICESTATS:
! 576: *(struct usb_device_stats *)data = sc->sc_bus->stats;
! 577: break;
! 578:
! 579: default:
! 580: return (EINVAL);
! 581: }
! 582: return (0);
! 583: }
! 584:
! 585: int
! 586: usbpoll(dev_t dev, int events, struct proc *p)
! 587: {
! 588: int revents, mask, s;
! 589:
! 590: if (minor(dev) == USB_DEV_MINOR) {
! 591: revents = 0;
! 592: mask = POLLIN | POLLRDNORM;
! 593:
! 594: s = splusb();
! 595: if (events & mask && usb_nevents > 0)
! 596: revents |= events & mask;
! 597: if (revents == 0 && events & mask)
! 598: selrecord(p, &usb_selevent);
! 599: splx(s);
! 600:
! 601: return (revents);
! 602: } else {
! 603: return (POLLERR);
! 604: }
! 605: }
! 606:
! 607: void filt_usbrdetach(struct knote *);
! 608: int filt_usbread(struct knote *, long);
! 609: int usbkqfilter(dev_t, struct knote *);
! 610:
! 611: void
! 612: filt_usbrdetach(struct knote *kn)
! 613: {
! 614: int s;
! 615:
! 616: s = splusb();
! 617: SLIST_REMOVE(&usb_selevent.si_note, kn, knote, kn_selnext);
! 618: splx(s);
! 619: }
! 620:
! 621: int
! 622: filt_usbread(struct knote *kn, long hint)
! 623: {
! 624:
! 625: if (usb_nevents == 0)
! 626: return (0);
! 627:
! 628: kn->kn_data = sizeof(struct usb_event);
! 629: return (1);
! 630: }
! 631:
! 632: struct filterops usbread_filtops =
! 633: { 1, NULL, filt_usbrdetach, filt_usbread };
! 634:
! 635: int
! 636: usbkqfilter(dev_t dev, struct knote *kn)
! 637: {
! 638: struct klist *klist;
! 639: int s;
! 640:
! 641: switch (kn->kn_filter) {
! 642: case EVFILT_READ:
! 643: if (minor(dev) != USB_DEV_MINOR)
! 644: return (1);
! 645: klist = &usb_selevent.si_note;
! 646: kn->kn_fop = &usbread_filtops;
! 647: break;
! 648:
! 649: default:
! 650: return (1);
! 651: }
! 652:
! 653: kn->kn_hook = NULL;
! 654:
! 655: s = splusb();
! 656: SLIST_INSERT_HEAD(klist, kn, kn_selnext);
! 657: splx(s);
! 658:
! 659: return (0);
! 660: }
! 661:
! 662: /* Explore device tree from the root. */
! 663: void
! 664: usb_discover(void *v)
! 665: {
! 666: struct usb_softc *sc = v;
! 667:
! 668: DPRINTFN(2,("usb_discover\n"));
! 669: #ifdef USB_DEBUG
! 670: if (usb_noexplore > 1)
! 671: return;
! 672: #endif
! 673: /*
! 674: * We need mutual exclusion while traversing the device tree,
! 675: * but this is guaranteed since this function is only called
! 676: * from the event thread for the controller.
! 677: */
! 678: while (sc->sc_bus->needs_explore && !sc->sc_dying) {
! 679: sc->sc_bus->needs_explore = 0;
! 680: sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub);
! 681: }
! 682: }
! 683:
! 684: void
! 685: usb_needs_explore(usbd_device_handle dev)
! 686: {
! 687: DPRINTFN(2,("usb_needs_explore\n"));
! 688: dev->bus->needs_explore = 1;
! 689: wakeup(&dev->bus->needs_explore);
! 690: }
! 691:
! 692: void
! 693: usb_needs_reattach(usbd_device_handle dev)
! 694: {
! 695: DPRINTFN(2,("usb_needs_reattach\n"));
! 696: dev->powersrc->reattach = 1;
! 697: dev->bus->needs_explore = 1;
! 698: wakeup(&dev->bus->needs_explore);
! 699: }
! 700:
! 701: /* Called at splusb() */
! 702: int
! 703: usb_get_next_event(struct usb_event *ue)
! 704: {
! 705: struct usb_event_q *ueq;
! 706:
! 707: if (usb_nevents <= 0)
! 708: return (0);
! 709: ueq = SIMPLEQ_FIRST(&usb_events);
! 710: #ifdef DIAGNOSTIC
! 711: if (ueq == NULL) {
! 712: printf("usb: usb_nevents got out of sync! %d\n", usb_nevents);
! 713: usb_nevents = 0;
! 714: return (0);
! 715: }
! 716: #endif
! 717: *ue = ueq->ue;
! 718: SIMPLEQ_REMOVE_HEAD(&usb_events, next);
! 719: free(ueq, M_USBDEV);
! 720: usb_nevents--;
! 721: return (1);
! 722: }
! 723:
! 724: void
! 725: usbd_add_dev_event(int type, usbd_device_handle udev)
! 726: {
! 727: struct usb_event ue;
! 728:
! 729: usbd_fill_deviceinfo(udev, &ue.u.ue_device, USB_EVENT_IS_ATTACH(type));
! 730: usb_add_event(type, &ue);
! 731: }
! 732:
! 733: void
! 734: usbd_add_drv_event(int type, usbd_device_handle udev, struct device *dev)
! 735: {
! 736: struct usb_event ue;
! 737:
! 738: ue.u.ue_driver.ue_cookie = udev->cookie;
! 739: strncpy(ue.u.ue_driver.ue_devname, dev->dv_xname,
! 740: sizeof ue.u.ue_driver.ue_devname);
! 741: usb_add_event(type, &ue);
! 742: }
! 743:
! 744: void
! 745: usb_add_event(int type, struct usb_event *uep)
! 746: {
! 747: struct usb_event_q *ueq;
! 748: struct usb_event ue;
! 749: struct timespec thetime;
! 750: int s;
! 751:
! 752: nanotime(&thetime);
! 753: /* Don't want to wait here inside splusb() */
! 754: ueq = malloc(sizeof *ueq, M_USBDEV, M_WAITOK);
! 755: ueq->ue = *uep;
! 756: ueq->ue.ue_type = type;
! 757: ueq->ue.ue_time = thetime;
! 758:
! 759: s = splusb();
! 760: if (++usb_nevents >= USB_MAX_EVENTS) {
! 761: /* Too many queued events, drop an old one. */
! 762: DPRINTFN(-1,("usb: event dropped\n"));
! 763: (void)usb_get_next_event(&ue);
! 764: }
! 765: SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next);
! 766: wakeup(&usb_events);
! 767: selwakeup(&usb_selevent);
! 768: if (usb_async_proc != NULL)
! 769: psignal(usb_async_proc, SIGIO);
! 770: splx(s);
! 771: }
! 772:
! 773: void
! 774: usb_schedsoftintr(usbd_bus_handle bus)
! 775: {
! 776: DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling));
! 777: #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
! 778: if (bus->use_polling) {
! 779: bus->methods->soft_intr(bus);
! 780: } else {
! 781: softintr_schedule(bus->soft);
! 782: }
! 783: #else
! 784: bus->methods->soft_intr(bus);
! 785: #endif /* __HAVE_GENERIC_SOFT_INTERRUPTS */
! 786: }
! 787:
! 788: int
! 789: usb_activate(struct device *self, enum devact act)
! 790: {
! 791: struct usb_softc *sc = (struct usb_softc *)self;
! 792: usbd_device_handle dev = sc->sc_port.device;
! 793: int i, rv = 0;
! 794:
! 795: switch (act) {
! 796: case DVACT_ACTIVATE:
! 797: break;
! 798:
! 799: case DVACT_DEACTIVATE:
! 800: sc->sc_dying = 1;
! 801: if (dev != NULL && dev->cdesc != NULL &&
! 802: dev->subdevs != NULL) {
! 803: for (i = 0; dev->subdevs[i]; i++)
! 804: rv |= config_deactivate(dev->subdevs[i]);
! 805: }
! 806: break;
! 807: }
! 808: return (rv);
! 809: }
! 810:
! 811: int
! 812: usb_detach(struct device *self, int flags)
! 813: {
! 814: struct usb_softc *sc = (struct usb_softc *)self;
! 815: struct usb_event ue;
! 816:
! 817: DPRINTF(("usb_detach: start\n"));
! 818:
! 819: sc->sc_dying = 1;
! 820:
! 821: /* Make all devices disconnect. */
! 822: if (sc->sc_port.device != NULL)
! 823: usb_disconnect_port(&sc->sc_port, self);
! 824:
! 825: /* Kill off event thread. */
! 826: if (sc->sc_event_thread != NULL) {
! 827: wakeup(&sc->sc_bus->needs_explore);
! 828: if (tsleep(sc, PWAIT, "usbdet", hz * 60))
! 829: printf("%s: event thread didn't die\n",
! 830: sc->sc_dev.dv_xname);
! 831: DPRINTF(("usb_detach: event thread dead\n"));
! 832: }
! 833:
! 834: usbd_finish();
! 835:
! 836: #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS
! 837: if (sc->sc_bus->soft != NULL) {
! 838: softintr_disestablish(sc->sc_bus->soft);
! 839: sc->sc_bus->soft = NULL;
! 840: }
! 841: #endif
! 842:
! 843: ue.u.ue_ctrlr.ue_bus = sc->sc_dev.dv_unit;
! 844: usb_add_event(USB_EVENT_CTRLR_DETACH, &ue);
! 845:
! 846: return (0);
! 847: }
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