2 * $NetBSD: usb.c,v 1.68 2002/02/20 20:30:12 christos Exp $
3 * $FreeBSD: src/sys/dev/usb/usb.c,v 1.106 2005/03/27 15:31:23 iedowse Exp $
4 * $DragonFly: src/sys/bus/usb/usb.c,v 1.50 2008/09/26 08:21:22 hasso Exp $
7 /* Also already merged from NetBSD:
8 * $NetBSD: usb.c,v 1.70 2002/05/09 21:54:32 augustss Exp $
9 * $NetBSD: usb.c,v 1.71 2002/06/01 23:51:04 lukem Exp $
10 * $NetBSD: usb.c,v 1.73 2002/09/23 05:51:19 simonb Exp $
11 * $NetBSD: usb.c,v 1.80 2003/11/07 17:03:25 wiz Exp $
15 * Copyright (c) 1998 The NetBSD Foundation, Inc.
16 * All rights reserved.
18 * This code is derived from software contributed to The NetBSD Foundation
19 * by Lennart Augustsson (lennart@augustsson.net) at
20 * Carlstedt Research & Technology.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * This product includes software developed by the NetBSD
33 * Foundation, Inc. and its contributors.
34 * 4. Neither the name of The NetBSD Foundation nor the names of its
35 * contributors may be used to endorse or promote products derived
36 * from this software without specific prior written permission.
38 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
39 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
40 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
42 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
43 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
44 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
45 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
46 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
48 * POSSIBILITY OF SUCH DAMAGE.
52 * USB specifications and other documentation can be found at
53 * http://www.usb.org/developers/docs/ and
54 * http://www.usb.org/developers/devclass_docs/
57 #include <sys/param.h>
58 #include <sys/systm.h>
59 #include <sys/kernel.h>
61 #include <sys/malloc.h>
62 #include <sys/unistd.h>
63 #include <sys/module.h>
65 #include <sys/fcntl.h>
66 #include <sys/filio.h>
68 #include <sys/kthread.h>
71 #include <sys/device.h>
73 #include <sys/select.h>
74 #include <sys/vnode.h>
75 #include <sys/signalvar.h>
76 #include <sys/sysctl.h>
77 #include <sys/thread2.h>
79 #include <bus/usb/usb.h>
80 #include <bus/usb/usbdi.h>
81 #include <bus/usb/usbdi_util.h>
83 #define USBUNIT(d) (minor(d)) /* usb_discover device nodes, kthread */
84 #define USB_DEV_MINOR 255 /* event queue device */
86 MALLOC_DEFINE(M_USB, "USB", "USB");
87 MALLOC_DEFINE(M_USBDEV, "USBdev", "USB device");
88 MALLOC_DEFINE(M_USBHC, "USBHC", "USB host controller");
92 #include <bus/usb/usbdivar.h>
93 #include <bus/usb/usb_quirks.h>
95 /* Define this unconditionally in case a kernel module is loaded that
96 * has been compiled with debugging options.
98 SYSCTL_NODE(_hw, OID_AUTO, usb, CTLFLAG_RW, 0, "USB debugging");
101 * XXX: This is a hack! If your USB keyboard doesn't work
102 * early at boot, try setting this tunable to 0 from
105 * set hw.usb.hack_defer_exploration=0
107 static int hack_defer_exploration = 1;
110 #define DPRINTF(x) if (usbdebug) kprintf x
111 #define DPRINTFN(n,x) if (usbdebug>(n)) kprintf x
113 SYSCTL_INT(_hw_usb, OID_AUTO, debug, CTLFLAG_RW,
114 &usbdebug, 0, "usb debug level");
117 * 0 - do usual exploration
118 * 1 - do not use timeout exploration
119 * >1 - do no exploration
121 int usb_noexplore = 0;
124 #define DPRINTFN(n,x)
129 TAILQ_ENTRY(usb_softc) sc_coldexplist; /* cold needs-explore list */
130 usbd_bus_handle sc_bus; /* USB controller */
131 struct usbd_port sc_port; /* dummy port for root hub */
133 struct thread *sc_event_thread;
139 TAILQ_HEAD(, usb_task) tasks;
140 struct thread *task_thread_proc;
142 int taskcreated; /* task thread exists. */
144 static struct usb_taskq usb_taskq[USB_NUM_TASKQS];
152 struct dev_ops usb_ops = {
153 { "usb", USB_CDEV_MAJOR, 0 },
161 static void usb_discover(device_t);
162 static bus_child_detached_t usb_child_detached;
163 static void usb_create_event_thread(device_t);
164 static void usb_event_thread(void *);
165 static void usb_task_thread(void *);
167 static cdev_t usb_dev; /* The /dev/usb device. */
168 static int usb_ndevs; /* Number of /dev/usbN devices. */
169 /* Busses to explore at the end of boot-time device configuration */
170 static TAILQ_HEAD(, usb_softc) usb_coldexplist =
171 TAILQ_HEAD_INITIALIZER(usb_coldexplist);
173 #define USB_MAX_EVENTS 100
176 TAILQ_ENTRY(usb_event_q) next;
178 static TAILQ_HEAD(, usb_event_q) usb_events =
179 TAILQ_HEAD_INITIALIZER(usb_events);
180 static int usb_nevents = 0;
181 static struct selinfo usb_selevent;
182 static struct proc *usb_async_proc; /* process that wants USB SIGIO */
183 static int usb_dev_open = 0;
184 static void usb_add_event(int, struct usb_event *);
186 static int usb_get_next_event(struct usb_event *);
188 static const char *usbrev_str[] = USBREV_STR;
190 static device_probe_t usb_match;
191 static device_attach_t usb_attach;
192 static device_detach_t usb_detach;
194 static devclass_t usb_devclass;
196 static kobj_method_t usb_methods[] = {
197 DEVMETHOD(device_probe, usb_match),
198 DEVMETHOD(device_attach, usb_attach),
199 DEVMETHOD(device_detach, usb_detach),
200 DEVMETHOD(bus_child_detached, usb_child_detached),
201 DEVMETHOD(device_suspend, bus_generic_suspend),
202 DEVMETHOD(device_resume, bus_generic_resume),
203 DEVMETHOD(device_shutdown, bus_generic_shutdown),
207 static driver_t usb_driver = {
210 sizeof(struct usb_softc)
213 MODULE_DEPEND(usb, usb, 1, 1, 1);
214 MODULE_VERSION(usb, 1);
217 usb_match(device_t self)
219 DPRINTF(("usb_match\n"));
220 return (UMATCH_GENERIC);
224 usb_attach(device_t self)
226 struct usb_softc *sc = device_get_softc(self);
227 void *aux = device_get_ivars(self);
229 usbd_device_handle dev;
235 TUNABLE_INT_FETCH("hw.usb.hack_defer_exploration",
236 &hack_defer_exploration);
238 DPRINTF(("usb_attach\n"));
242 sc->sc_bus->usbctl = sc;
243 sc->sc_port.power = USB_MAX_POWER;
245 usbrev = sc->sc_bus->usbrev;
246 device_printf(self, "USB revision %s", usbrev_str[usbrev]);
250 speed = USB_SPEED_FULL;
253 speed = USB_SPEED_HIGH;
256 kprintf(", not supported\n");
262 /* Make sure not to use tsleep() if we are cold booting. */
263 if (hack_defer_exploration && cold)
264 sc->sc_bus->use_polling++;
266 ue.u.ue_ctrlr.ue_bus = device_get_unit(self);
267 usb_add_event(USB_EVENT_CTRLR_ATTACH, &ue);
269 #ifdef USB_USE_SOFTINTR
270 callout_init(&sc->sc_bus->softi);
273 err = usbd_new_device(self, sc->sc_bus, 0, speed, 0,
276 dev = sc->sc_port.device;
277 if (dev->hub == NULL) {
280 "root device is not a hub\n");
283 sc->sc_bus->root_hub = dev;
286 * Turning this code off will delay attachment of USB devices
287 * until the USB event thread is running, which means that
288 * the keyboard will not work until after cold boot.
291 if (hack_defer_exploration) {
292 /* Explore high-speed busses before others. */
293 if (speed == USB_SPEED_HIGH)
294 dev->hub->explore(sc->sc_bus->root_hub);
296 TAILQ_INSERT_TAIL(&usb_coldexplist, sc,
300 * XXX Exploring high speed devices here will
303 if (speed != USB_SPEED_HIGH)
304 dev->hub->explore(sc->sc_bus->root_hub);
310 "root hub problem, error=%d\n", err);
313 if (hack_defer_exploration && cold)
314 sc->sc_bus->use_polling--;
316 usb_create_event_thread(self);
317 /* The per controller devices (used for usb_discover) */
318 /* XXX This is redundant now, but old usbd's will want it */
319 dev_ops_add(&usb_ops, -1, device_get_unit(self));
320 tmp_dev = make_dev(&usb_ops, device_get_unit(self),
321 UID_ROOT, GID_OPERATOR, 0660,
322 "usb%d", device_get_unit(self));
323 sc->sc_usbdev = reference_dev(tmp_dev);
324 if (usb_ndevs++ == 0) {
325 /* The device spitting out events */
326 dev_ops_add(&usb_ops, -1, USB_DEV_MINOR);
327 tmp_dev = make_dev(&usb_ops, USB_DEV_MINOR,
328 UID_ROOT, GID_OPERATOR, 0660, "usb");
329 usb_dev = reference_dev(tmp_dev);
335 static const char *taskq_names[] = USB_TASKQ_NAMES;
338 usb_create_event_thread(device_t self)
340 struct usb_softc *sc = device_get_softc(self);
343 if (kthread_create(usb_event_thread, self, &sc->sc_event_thread,
344 "%s", device_get_nameunit(self))) {
346 "unable to create event thread for\n");
347 panic("usb_create_event_thread");
350 for (i = 0; i < USB_NUM_TASKQS; i++) {
351 struct usb_taskq *taskq = &usb_taskq[i];
353 if (taskq->taskcreated == 0) {
354 taskq->taskcreated = 1;
355 taskq->name = taskq_names[i];
356 TAILQ_INIT(&taskq->tasks);
357 if (kthread_create(usb_task_thread, taskq,
358 &taskq->task_thread_proc, taskq->name)) {
359 kprintf("unable to create task thread\n");
360 panic("usb_create_event_thread task");
367 * Add a task to be performed by the task thread. This function can be
368 * called from any context and the task will be executed in a process
372 usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue)
374 struct usb_taskq *taskq;
378 taskq = &usb_taskq[queue];
379 if (task->queue == -1) {
380 DPRINTFN(2,("usb_add_task: task=%p\n", task));
381 TAILQ_INSERT_TAIL(&taskq->tasks, task, next);
384 DPRINTFN(3,("usb_add_task: task=%p on q\n", task));
386 wakeup(&taskq->tasks);
392 usb_do_task(usbd_device_handle dev, struct usb_task *task, int queue,
395 struct usb_taskq *taskq;
399 taskq = &usb_taskq[queue];
400 if (task->queue == -1) {
401 DPRINTFN(2,("usb_add_task: task=%p\n", task));
402 TAILQ_INSERT_TAIL(&taskq->tasks, task, next);
405 DPRINTFN(3,("usb_add_task: task=%p on q\n", task));
407 wakeup(&taskq->tasks);
409 /* Wait until task is finished */
410 tsleep((&taskq->tasks + 1), 0, "usbdotsk", time_out);
416 usb_rem_task(usbd_device_handle dev, struct usb_task *task)
419 if (task->queue != -1) {
420 TAILQ_REMOVE(&usb_taskq[task->queue].tasks, task, next);
427 usb_event_thread(void *arg)
430 struct usb_softc *sc = device_get_softc(self);
432 DPRINTF(("usb_event_thread: start\n"));
435 * In case this controller is a companion controller to an
436 * EHCI controller we need to wait until the EHCI controller
437 * has grabbed the port.
438 * XXX It would be nicer to do this with a tsleep(), but I don't
439 * know how to synchronize the creation of the threads so it
442 usb_delay_ms(sc->sc_bus, 500);
446 /* Make sure first discover does something. */
447 sc->sc_bus->needs_explore = 1;
450 while (!sc->sc_dying) {
452 if (usb_noexplore < 2)
456 tsleep(&sc->sc_bus->needs_explore, 0, "usbevt",
457 usb_noexplore ? 0 : hz * 60);
459 tsleep(&sc->sc_bus->needs_explore, 0, "usbevt", hz * 60);
461 DPRINTFN(2,("usb_event_thread: woke up\n"));
463 sc->sc_event_thread = NULL;
467 /* In case parent is waiting for us to exit. */
470 DPRINTF(("usb_event_thread: exit\n"));
475 usb_task_thread(void *arg)
477 struct usb_task *task;
478 struct usb_taskq *taskq;
483 DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name));
485 while (usb_ndevs > 0) {
486 task = TAILQ_FIRST(&taskq->tasks);
488 tsleep(&taskq->tasks, 0, "usbtsk", 0);
489 task = TAILQ_FIRST(&taskq->tasks);
491 DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task));
493 TAILQ_REMOVE(&taskq->tasks, task, next);
496 task->fun(task->arg);
498 wakeup((&taskq->tasks + 1));
504 taskq->taskcreated = 0;
505 wakeup(&taskq->taskcreated);
507 DPRINTF(("usb_event_thread: exit\n"));
511 usbopen(struct dev_open_args *ap)
513 cdev_t dev = ap->a_head.a_dev;
514 int unit = USBUNIT(dev);
515 struct usb_softc *sc;
517 if (unit == USB_DEV_MINOR) {
521 usb_async_proc = NULL;
525 sc = devclass_get_softc(usb_devclass, unit);
536 usbread(struct dev_read_args *ap)
538 cdev_t dev = ap->a_head.a_dev;
539 struct uio *uio = ap->a_uio;
541 int unit = USBUNIT(dev);
544 if (unit != USB_DEV_MINOR)
547 if (uio->uio_resid != sizeof(struct usb_event))
553 n = usb_get_next_event(&ue);
556 if (ap->a_ioflag & IO_NDELAY) {
560 error = tsleep(&usb_events, PCATCH, "usbrea", 0);
566 error = uiomove((void *)&ue, uio->uio_resid, uio);
572 usbclose(struct dev_close_args *ap)
574 cdev_t dev = ap->a_head.a_dev;
575 int unit = USBUNIT(dev);
577 if (unit == USB_DEV_MINOR) {
578 usb_async_proc = NULL;
586 usbioctl(struct dev_ioctl_args *ap)
588 cdev_t devt = ap->a_head.a_dev;
589 struct usb_softc *sc;
590 int unit = USBUNIT(devt);
592 if (unit == USB_DEV_MINOR) {
595 if (*(int *)ap->a_data)
596 usb_async_proc = curproc;
598 usb_async_proc = NULL;
606 sc = devclass_get_softc(usb_devclass, unit);
612 /* This part should be deleted */
617 struct usb_ctl_request *ur = (void *)ap->a_data;
618 int len = UGETW(ur->ucr_request.wLength);
622 int addr = ur->ucr_addr;
626 DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len));
627 if (len < 0 || len > 32768)
629 if (addr < 0 || addr >= USB_MAX_DEVICES ||
630 sc->sc_bus->devices[addr] == 0)
633 iov.iov_base = (caddr_t)ur->ucr_data;
639 uio.uio_segflg = UIO_USERSPACE;
641 ur->ucr_request.bmRequestType & UT_READ ?
642 UIO_READ : UIO_WRITE;
643 uio.uio_td = curthread;
644 ptr = kmalloc(len, M_TEMP, M_WAITOK);
645 if (uio.uio_rw == UIO_WRITE) {
646 error = uiomove(ptr, len, &uio);
651 err = usbd_do_request_flags(sc->sc_bus->devices[addr],
652 &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen,
653 USBD_DEFAULT_TIMEOUT);
659 if (uio.uio_rw == UIO_READ) {
660 error = uiomove(ptr, len, &uio);
673 struct usb_device_info *di = (void *)ap->a_data;
674 int addr = di->udi_addr;
675 usbd_device_handle dev;
677 if (addr < 1 || addr >= USB_MAX_DEVICES)
679 dev = sc->sc_bus->devices[addr];
682 usbd_fill_deviceinfo(dev, di, 1);
686 case USB_DEVICESTATS:
687 *(struct usb_device_stats *)ap->a_data = sc->sc_bus->stats;
697 usbpoll(struct dev_poll_args *ap)
699 cdev_t dev = ap->a_head.a_dev;
701 int unit = USBUNIT(dev);
703 if (unit == USB_DEV_MINOR) {
705 mask = POLLIN | POLLRDNORM;
708 if (ap->a_events & mask && usb_nevents > 0)
709 revents |= ap->a_events & mask;
710 if (revents == 0 && ap->a_events & mask)
711 selrecord(curthread, &usb_selevent);
713 ap->a_events = revents;
717 return (0); /* select/poll never wakes up - back compat */
721 /* Explore device tree from the root. */
723 usb_discover(device_t self)
725 struct usb_softc *sc = device_get_softc(self);
727 DPRINTFN(2,("usb_discover\n"));
729 if (usb_noexplore > 1)
734 * We need mutual exclusion while traversing the device tree,
735 * but this is guaranteed since this function is only called
736 * from the event thread for the controller.
739 while (sc->sc_bus->needs_explore && !sc->sc_dying) {
740 sc->sc_bus->needs_explore = 0;
743 sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub);
751 usb_needs_explore(usbd_device_handle dev)
753 DPRINTFN(2,("usb_needs_explore\n"));
754 dev->bus->needs_explore = 1;
755 wakeup(&dev->bus->needs_explore);
758 /* Called from a critical section */
760 usb_get_next_event(struct usb_event *ue)
762 struct usb_event_q *ueq;
764 if (usb_nevents <= 0)
766 ueq = TAILQ_FIRST(&usb_events);
769 kprintf("usb: usb_nevents got out of sync! %d\n", usb_nevents);
776 TAILQ_REMOVE(&usb_events, ueq, next);
777 kfree(ueq, M_USBDEV);
783 usbd_add_dev_event(int type, usbd_device_handle udev)
787 usbd_fill_deviceinfo(udev, &ue.u.ue_device, USB_EVENT_IS_ATTACH(type));
788 usb_add_event(type, &ue);
792 usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev)
796 ue.u.ue_driver.ue_cookie = udev->cookie;
797 strncpy(ue.u.ue_driver.ue_devname, device_get_nameunit(dev),
798 sizeof ue.u.ue_driver.ue_devname);
799 usb_add_event(type, &ue);
803 usb_add_event(int type, struct usb_event *uep)
805 struct usb_event_q *ueq;
806 struct timeval thetime;
808 ueq = kmalloc(sizeof *ueq, M_USBDEV, M_INTWAIT);
810 ueq->ue.ue_type = type;
812 TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time);
815 if (USB_EVENT_IS_DETACH(type)) {
816 struct usb_event_q *ueqi, *ueqi_next;
818 for (ueqi = TAILQ_FIRST(&usb_events); ueqi; ueqi = ueqi_next) {
819 ueqi_next = TAILQ_NEXT(ueqi, next);
820 if (ueqi->ue.u.ue_driver.ue_cookie.cookie ==
821 uep->u.ue_device.udi_cookie.cookie) {
822 TAILQ_REMOVE(&usb_events, ueqi, next);
823 kfree(ueqi, M_USBDEV);
825 ueqi_next = TAILQ_FIRST(&usb_events);
829 if (usb_nevents >= USB_MAX_EVENTS) {
830 /* Too many queued events, drop an old one. */
831 DPRINTF(("usb: event dropped\n"));
832 usb_get_next_event(NULL);
834 TAILQ_INSERT_TAIL(&usb_events, ueq, next);
837 selwakeup(&usb_selevent);
838 if (usb_async_proc != NULL) {
839 ksignal(usb_async_proc, SIGIO);
845 usb_schedsoftintr(usbd_bus_handle bus)
847 DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling));
848 #ifdef USB_USE_SOFTINTR
849 if (bus->use_polling) {
850 bus->methods->soft_intr(bus);
852 if (!callout_pending(&bus->softi))
853 callout_reset(&bus->softi, 0, bus->methods->soft_intr,
857 bus->methods->soft_intr(bus);
858 #endif /* USB_USE_SOFTINTR */
862 usb_detach(device_t self)
864 struct usb_softc *sc = device_get_softc(self);
867 DPRINTF(("usb_detach: start\n"));
871 /* Make all devices disconnect. */
872 if (sc->sc_port.device != NULL)
873 usb_disconnect_port(&sc->sc_port, self);
875 /* Kill off event thread. */
876 if (sc->sc_event_thread != NULL) {
877 wakeup(&sc->sc_bus->needs_explore);
878 if (tsleep(sc, 0, "usbdet", hz * 60))
880 "event thread didn't die\n");
881 DPRINTF(("usb_detach: event thread dead\n"));
884 release_dev(sc->sc_usbdev);
885 dev_ops_add(&usb_ops, -1, device_get_unit(self));
887 if (--usb_ndevs == 0) {
890 release_dev(usb_dev);
891 dev_ops_remove(&usb_ops, -1, USB_DEV_MINOR);
894 for (i = 0; i < USB_NUM_TASKQS; i++) {
895 struct usb_taskq *taskq = &usb_taskq[i];
896 wakeup(&taskq->tasks);
897 if (tsleep(&taskq->taskcreated, 0, "usbtdt",
899 kprintf("usb task thread %s didn't die\n",
907 #ifdef USB_USE_SOFTINTR
908 callout_stop(&sc->sc_bus->softi);
911 ue.u.ue_ctrlr.ue_bus = device_get_unit(self);
912 usb_add_event(USB_EVENT_CTRLR_DETACH, &ue);
918 usb_child_detached(device_t self, device_t child)
920 struct usb_softc *sc = device_get_softc(self);
922 /* XXX, should check it is the right device. */
923 sc->sc_port.device = NULL;
926 /* Explore USB busses at the end of device configuration */
928 usb_cold_explore(void *arg)
930 struct usb_softc *sc;
932 TUNABLE_INT_FETCH("hw.usb.hack_defer_exploration",
933 &hack_defer_exploration);
935 if (!hack_defer_exploration)
938 KASSERT(cold || TAILQ_EMPTY(&usb_coldexplist),
939 ("usb_cold_explore: busses to explore when !cold"));
940 while (!TAILQ_EMPTY(&usb_coldexplist)) {
941 sc = TAILQ_FIRST(&usb_coldexplist);
942 TAILQ_REMOVE(&usb_coldexplist, sc, sc_coldexplist);
944 sc->sc_bus->use_polling++;
945 sc->sc_port.device->hub->explore(sc->sc_bus->root_hub);
946 sc->sc_bus->use_polling--;
951 usb_getbushandle(struct usb_softc *sc)
957 SYSINIT(usb_cold_explore, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE,
958 usb_cold_explore, NULL);
960 DRIVER_MODULE(usb, ohci, usb_driver, usb_devclass, 0, 0);
961 DRIVER_MODULE(usb, uhci, usb_driver, usb_devclass, 0, 0);
962 DRIVER_MODULE(usb, ehci, usb_driver, usb_devclass, 0, 0);