/* * $NetBSD: usb.c,v 1.68 2002/02/20 20:30:12 christos Exp $ * $FreeBSD: src/sys/dev/usb/usb.c,v 1.106 2005/03/27 15:31:23 iedowse Exp $ * $DragonFly: src/sys/bus/usb/usb.c,v 1.39 2007/07/03 19:28:16 hasso Exp $ */ /* Also already merged from NetBSD: * $NetBSD: usb.c,v 1.70 2002/05/09 21:54:32 augustss Exp $ * $NetBSD: usb.c,v 1.71 2002/06/01 23:51:04 lukem Exp $ * $NetBSD: usb.c,v 1.73 2002/09/23 05:51:19 simonb Exp $ * $NetBSD: usb.c,v 1.80 2003/11/07 17:03:25 wiz Exp $ */ /* * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Lennart Augustsson (lennart@augustsson.net) at * Carlstedt Research & Technology. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * USB specifications and other documentation can be found at * http://www.usb.org/developers/docs/ and * http://www.usb.org/developers/devclass_docs/ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define USBUNIT(d) (minor(d)) /* usb_discover device nodes, kthread */ #define USB_DEV_MINOR 255 /* event queue device */ MALLOC_DEFINE(M_USB, "USB", "USB"); MALLOC_DEFINE(M_USBDEV, "USBdev", "USB device"); MALLOC_DEFINE(M_USBHC, "USBHC", "USB host controller"); #include "usb_if.h" #include #include /* Define this unconditionally in case a kernel module is loaded that * has been compiled with debugging options. */ SYSCTL_NODE(_hw, OID_AUTO, usb, CTLFLAG_RW, 0, "USB debugging"); #ifdef USB_DEBUG #define DPRINTF(x) if (usbdebug) kprintf x #define DPRINTFN(n,x) if (usbdebug>(n)) kprintf x int usbdebug = 0; SYSCTL_INT(_hw_usb, OID_AUTO, debug, CTLFLAG_RW, &usbdebug, 0, "usb debug level"); /* * 0 - do usual exploration * 1 - do not use timeout exploration * >1 - do no exploration */ int usb_noexplore = 0; #else #define DPRINTF(x) #define DPRINTFN(n,x) #endif struct usb_softc { device_t sc_dev; /* base device */ cdev_t sc_usbdev; usbd_bus_handle sc_bus; /* USB controller */ struct usbd_port sc_port; /* dummy port for root hub */ struct thread *sc_event_thread; char sc_dying; }; struct usb_taskq { TAILQ_HEAD(, usb_task) tasks; struct thread *task_thread_proc; const char *name; int taskcreated; /* task thread exists. */ }; static struct usb_taskq usb_taskq[USB_NUM_TASKQS]; d_open_t usbopen; d_close_t usbclose; d_read_t usbread; d_ioctl_t usbioctl; d_poll_t usbpoll; struct dev_ops usb_ops = { { "usb", USB_CDEV_MAJOR, 0 }, .d_open = usbopen, .d_close = usbclose, .d_read = usbread, .d_ioctl = usbioctl, .d_poll = usbpoll, }; static void usb_discover(void *); static bus_child_detached_t usb_child_detached; static void usb_create_event_thread(void *); static void usb_event_thread(void *); static void usb_task_thread(void *); static cdev_t usb_dev; /* The /dev/usb device. */ static int usb_ndevs; /* Number of /dev/usbN devices. */ #define USB_MAX_EVENTS 100 struct usb_event_q { struct usb_event ue; TAILQ_ENTRY(usb_event_q) next; }; static TAILQ_HEAD(, usb_event_q) usb_events = TAILQ_HEAD_INITIALIZER(usb_events); static int usb_nevents = 0; static struct selinfo usb_selevent; static struct proc *usb_async_proc; /* process that wants USB SIGIO */ static int usb_dev_open = 0; static void usb_add_event(int, struct usb_event *); static int usb_get_next_event(struct usb_event *); static const char *usbrev_str[] = USBREV_STR; static device_probe_t usb_match; static device_attach_t usb_attach; static device_detach_t usb_detach; static devclass_t usb_devclass; static kobj_method_t usb_methods[] = { DEVMETHOD(device_probe, usb_match), DEVMETHOD(device_attach, usb_attach), DEVMETHOD(device_detach, usb_detach), DEVMETHOD(bus_child_detached, usb_child_detached), DEVMETHOD(device_suspend, bus_generic_suspend), DEVMETHOD(device_resume, bus_generic_resume), DEVMETHOD(device_shutdown, bus_generic_shutdown), {0,0} }; static driver_t usb_driver = { "usb", usb_methods, sizeof(struct usb_softc) }; MODULE_DEPEND(usb, usb, 1, 1, 1); MODULE_VERSION(usb, 1); static int usb_match(device_t self) { DPRINTF(("usbd_match\n")); return (UMATCH_GENERIC); } static int usb_attach(device_t self) { struct usb_softc *sc = device_get_softc(self); void *aux = device_get_ivars(self); cdev_t tmp_dev; usbd_device_handle dev; usbd_status err; int usbrev; int speed; struct usb_event ue; sc->sc_dev = self; DPRINTF(("usbd_attach\n")); usbd_init(); sc->sc_bus = aux; sc->sc_bus->usbctl = sc; sc->sc_port.power = USB_MAX_POWER; kprintf("%s", device_get_nameunit(sc->sc_dev)); usbrev = sc->sc_bus->usbrev; kprintf(": USB revision %s", usbrev_str[usbrev]); switch (usbrev) { case USBREV_1_0: case USBREV_1_1: speed = USB_SPEED_FULL; break; case USBREV_2_0: speed = USB_SPEED_HIGH; break; default: kprintf(", not supported\n"); sc->sc_dying = 1; return ENXIO; } kprintf("\n"); #if 0 /* Make sure not to use tsleep() if we are cold booting. */ if (cold) sc->sc_bus->use_polling++; #endif ue.u.ue_ctrlr.ue_bus = device_get_unit(sc->sc_dev); usb_add_event(USB_EVENT_CTRLR_ATTACH, &ue); #ifdef USB_USE_SOFTINTR #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS /* XXX we should have our own level */ sc->sc_bus->soft = softintr_establish(IPL_SOFTNET, sc->sc_bus->methods->soft_intr, sc->sc_bus); if (sc->sc_bus->soft == NULL) { kprintf("%s: can't register softintr\n", device_get_nameunit(sc->sc_dev)); sc->sc_dying = 1; return ENXIO; } #else callout_init(&sc->sc_bus->softi); #endif #endif err = usbd_new_device(sc->sc_dev, sc->sc_bus, 0, speed, 0, &sc->sc_port); if (!err) { dev = sc->sc_port.device; if (dev->hub == NULL) { sc->sc_dying = 1; kprintf("%s: root device is not a hub\n", device_get_nameunit(sc->sc_dev)); return ENXIO; } sc->sc_bus->root_hub = dev; #if 1 /* * Turning this code off will delay attachment of USB devices * until the USB event thread is running, which means that * the keyboard will not work until after cold boot. */ if (cold) { /* * XXX Exploring high speed device here will * hang the system. */ if (speed != USB_SPEED_HIGH) dev->hub->explore(sc->sc_bus->root_hub); } #endif } else { kprintf("%s: root hub problem, error=%d\n", device_get_nameunit(sc->sc_dev), err); sc->sc_dying = 1; } #if 0 if (cold) sc->sc_bus->use_polling--; #endif usb_create_event_thread(sc); /* The per controller devices (used for usb_discover) */ /* XXX This is redundant now, but old usbd's will want it */ dev_ops_add(&usb_ops, -1, device_get_unit(self)); tmp_dev = make_dev(&usb_ops, device_get_unit(self), UID_ROOT, GID_OPERATOR, 0660, "usb%d", device_get_unit(self)); sc->sc_usbdev = reference_dev(tmp_dev); if (usb_ndevs++ == 0) { /* The device spitting out events */ dev_ops_add(&usb_ops, -1, USB_DEV_MINOR); tmp_dev = make_dev(&usb_ops, USB_DEV_MINOR, UID_ROOT, GID_OPERATOR, 0660, "usb"); usb_dev = reference_dev(tmp_dev); } return 0; } static const char *taskq_names[] = USB_TASKQ_NAMES; void usb_create_event_thread(void *arg) { struct usb_softc *sc = arg; int i; if (kthread_create(usb_event_thread, sc, &sc->sc_event_thread, "%s", device_get_nameunit(sc->sc_dev))) { kprintf("%s: unable to create event thread for\n", device_get_nameunit(sc->sc_dev)); panic("usb_create_event_thread"); } for (i = 0; i < USB_NUM_TASKQS; i++) { struct usb_taskq *taskq = &usb_taskq[i]; if (taskq->taskcreated == 0) { taskq->taskcreated = 1; taskq->name = taskq_names[i]; TAILQ_INIT(&taskq->tasks); if (kthread_create(usb_task_thread, taskq, &taskq->task_thread_proc, taskq->name)) { kprintf("unable to create task thread\n"); panic("usb_create_event_thread task"); } } } } /* * Add a task to be performed by the task thread. This function can be * called from any context and the task will be executed in a process * context ASAP. */ void usb_add_task(usbd_device_handle dev, struct usb_task *task, int queue) { struct usb_taskq *taskq; crit_enter(); taskq = &usb_taskq[queue]; if (task->queue == -1) { DPRINTFN(2,("usb_add_task: task=%p\n", task)); TAILQ_INSERT_TAIL(&taskq->tasks, task, next); task->queue = queue; } else { DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); } wakeup(&taskq->tasks); crit_exit(); } void usb_do_task(usbd_device_handle dev, struct usb_task *task, int queue, int time_out) { struct usb_taskq *taskq; crit_enter(); taskq = &usb_taskq[queue]; if (task->queue == -1) { DPRINTFN(2,("usb_add_task: task=%p\n", task)); TAILQ_INSERT_TAIL(&taskq->tasks, task, next); task->queue = queue; } else { DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); } wakeup(&taskq->tasks); /* Wait until task is finished */ tsleep((&taskq->tasks + 1), 0, "usbdotsk", time_out); crit_exit(); } void usb_rem_task(usbd_device_handle dev, struct usb_task *task) { crit_enter(); if (task->queue != -1) { TAILQ_REMOVE(&usb_taskq[task->queue].tasks, task, next); task->queue = -1; } crit_exit(); } void usb_event_thread(void *arg) { struct usb_softc *sc = arg; DPRINTF(("usb_event_thread: start\n")); /* * In case this controller is a companion controller to an * EHCI controller we need to wait until the EHCI controller * has grabbed the port. * XXX It would be nicer to do this with a tsleep(), but I don't * know how to synchronize the creation of the threads so it * will work. */ usb_delay_ms(sc->sc_bus, 500); crit_enter(); /* Make sure first discover does something. */ sc->sc_bus->needs_explore = 1; usb_discover(sc); while (!sc->sc_dying) { #ifdef USB_DEBUG if (usb_noexplore < 2) #endif usb_discover(sc); #ifdef USB_DEBUG tsleep(&sc->sc_bus->needs_explore, 0, "usbevt", usb_noexplore ? 0 : hz * 60); #else tsleep(&sc->sc_bus->needs_explore, 0, "usbevt", hz * 60); #endif DPRINTFN(2,("usb_event_thread: woke up\n")); } sc->sc_event_thread = NULL; crit_exit(); /* In case parent is waiting for us to exit. */ wakeup(sc); DPRINTF(("usb_event_thread: exit\n")); kthread_exit(); } void usb_task_thread(void *arg) { struct usb_task *task; struct usb_taskq *taskq; crit_enter(); taskq = arg; DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name)); while (usb_ndevs > 0) { task = TAILQ_FIRST(&taskq->tasks); if (task == NULL) { tsleep(&taskq->tasks, 0, "usbtsk", 0); task = TAILQ_FIRST(&taskq->tasks); } DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); if (task != NULL) { TAILQ_REMOVE(&taskq->tasks, task, next); task->queue = -1; crit_exit(); task->fun(task->arg); crit_enter(); wakeup((&taskq->tasks + 1)); } } crit_exit(); taskq->taskcreated = 0; wakeup(&taskq->taskcreated); DPRINTF(("usb_event_thread: exit\n")); } int usbopen(struct dev_open_args *ap) { cdev_t dev = ap->a_head.a_dev; int unit = USBUNIT(dev); struct usb_softc *sc; if (unit == USB_DEV_MINOR) { if (usb_dev_open) return (EBUSY); usb_dev_open = 1; usb_async_proc = NULL; return (0); } sc = devclass_get_softc(usb_devclass, unit); if (sc == NULL) return (ENXIO); if (sc->sc_dying) return (EIO); return (0); } int usbread(struct dev_read_args *ap) { cdev_t dev = ap->a_head.a_dev; struct uio *uio = ap->a_uio; struct usb_event ue; int unit = USBUNIT(dev); int error, n; if (unit != USB_DEV_MINOR) return (ENODEV); if (uio->uio_resid != sizeof(struct usb_event)) return (EINVAL); error = 0; crit_enter(); for (;;) { n = usb_get_next_event(&ue); if (n != 0) break; if (ap->a_ioflag & IO_NDELAY) { error = EWOULDBLOCK; break; } error = tsleep(&usb_events, PCATCH, "usbrea", 0); if (error) break; } crit_exit(); if (!error) error = uiomove((void *)&ue, uio->uio_resid, uio); return (error); } int usbclose(struct dev_close_args *ap) { cdev_t dev = ap->a_head.a_dev; int unit = USBUNIT(dev); if (unit == USB_DEV_MINOR) { usb_async_proc = NULL; usb_dev_open = 0; } return (0); } int usbioctl(struct dev_ioctl_args *ap) { cdev_t devt = ap->a_head.a_dev; struct usb_softc *sc; int unit = USBUNIT(devt); if (unit == USB_DEV_MINOR) { switch (ap->a_cmd) { case FIOASYNC: if (*(int *)ap->a_data) usb_async_proc = curproc; else usb_async_proc = NULL; return (0); default: return (EINVAL); } } sc = devclass_get_softc(usb_devclass, unit); if (sc->sc_dying) return (EIO); switch (ap->a_cmd) { /* This part should be deleted */ case USB_DISCOVER: break; case USB_REQUEST: { struct usb_ctl_request *ur = (void *)ap->a_data; int len = UGETW(ur->ucr_request.wLength); struct iovec iov; struct uio uio; void *ptr = 0; int addr = ur->ucr_addr; usbd_status err; int error = 0; DPRINTF(("usbioctl: USB_REQUEST addr=%d len=%d\n", addr, len)); if (len < 0 || len > 32768) return (EINVAL); if (addr < 0 || addr >= USB_MAX_DEVICES || sc->sc_bus->devices[addr] == 0) return (EINVAL); if (len != 0) { iov.iov_base = (caddr_t)ur->ucr_data; iov.iov_len = len; uio.uio_iov = &iov; uio.uio_iovcnt = 1; uio.uio_resid = len; uio.uio_offset = 0; uio.uio_segflg = UIO_USERSPACE; uio.uio_rw = ur->ucr_request.bmRequestType & UT_READ ? UIO_READ : UIO_WRITE; uio.uio_td = curthread; ptr = kmalloc(len, M_TEMP, M_WAITOK); if (uio.uio_rw == UIO_WRITE) { error = uiomove(ptr, len, &uio); if (error) goto ret; } } err = usbd_do_request_flags(sc->sc_bus->devices[addr], &ur->ucr_request, ptr, ur->ucr_flags, &ur->ucr_actlen, USBD_DEFAULT_TIMEOUT); if (err) { error = EIO; goto ret; } if (len != 0) { if (uio.uio_rw == UIO_READ) { error = uiomove(ptr, len, &uio); if (error) goto ret; } } ret: if (ptr) kfree(ptr, M_TEMP); return (error); } case USB_DEVICEINFO: { struct usb_device_info *di = (void *)ap->a_data; int addr = di->udi_addr; usbd_device_handle dev; if (addr < 1 || addr >= USB_MAX_DEVICES) return (EINVAL); dev = sc->sc_bus->devices[addr]; if (dev == NULL) return (ENXIO); usbd_fill_deviceinfo(dev, di, 1); break; } case USB_DEVICESTATS: *(struct usb_device_stats *)ap->a_data = sc->sc_bus->stats; break; default: return (EINVAL); } return (0); } int usbpoll(struct dev_poll_args *ap) { cdev_t dev = ap->a_head.a_dev; int revents, mask; int unit = USBUNIT(dev); if (unit == USB_DEV_MINOR) { revents = 0; mask = POLLIN | POLLRDNORM; crit_enter(); if (ap->a_events & mask && usb_nevents > 0) revents |= ap->a_events & mask; if (revents == 0 && ap->a_events & mask) selrecord(curthread, &usb_selevent); crit_exit(); ap->a_events = revents; return (0); } else { ap->a_events = 0; return (0); /* select/poll never wakes up - back compat */ } } /* Explore device tree from the root. */ static void usb_discover(void *v) { struct usb_softc *sc = v; DPRINTFN(2,("usb_discover\n")); #ifdef USB_DEBUG if (usb_noexplore > 1) return; #endif /* * We need mutual exclusion while traversing the device tree, * but this is guaranteed since this function is only called * from the event thread for the controller. */ crit_enter(); while (sc->sc_bus->needs_explore && !sc->sc_dying) { sc->sc_bus->needs_explore = 0; crit_exit(); sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); crit_enter(); } crit_exit(); } void usb_needs_explore(usbd_device_handle dev) { DPRINTFN(2,("usb_needs_explore\n")); dev->bus->needs_explore = 1; wakeup(&dev->bus->needs_explore); } /* Called from a critical section */ int usb_get_next_event(struct usb_event *ue) { struct usb_event_q *ueq; if (usb_nevents <= 0) return (0); ueq = TAILQ_FIRST(&usb_events); #ifdef DIAGNOSTIC if (ueq == NULL) { kprintf("usb: usb_nevents got out of sync! %d\n", usb_nevents); usb_nevents = 0; return (0); } #endif *ue = ueq->ue; TAILQ_REMOVE(&usb_events, ueq, next); kfree(ueq, M_USBDEV); usb_nevents--; return (1); } void usbd_add_dev_event(int type, usbd_device_handle udev) { struct usb_event ue; usbd_fill_deviceinfo(udev, &ue.u.ue_device, USB_EVENT_IS_ATTACH(type)); usb_add_event(type, &ue); } void usbd_add_drv_event(int type, usbd_device_handle udev, device_t dev) { struct usb_event ue; ue.u.ue_driver.ue_cookie = udev->cookie; strncpy(ue.u.ue_driver.ue_devname, device_get_nameunit(dev), sizeof ue.u.ue_driver.ue_devname); usb_add_event(type, &ue); } void usb_add_event(int type, struct usb_event *uep) { struct usb_event_q *ueq; struct usb_event ue; struct timeval thetime; ueq = kmalloc(sizeof *ueq, M_USBDEV, M_INTWAIT); ueq->ue = *uep; ueq->ue.ue_type = type; microtime(&thetime); TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); crit_enter(); if (USB_EVENT_IS_DETACH(type)) { struct usb_event_q *ueqi, *ueqi_next; for (ueqi = TAILQ_FIRST(&usb_events); ueqi; ueqi = ueqi_next) { ueqi_next = TAILQ_NEXT(ueqi, next); if (ueqi->ue.u.ue_driver.ue_cookie.cookie == uep->u.ue_device.udi_cookie.cookie) { TAILQ_REMOVE(&usb_events, ueqi, next); kfree(ueqi, M_USBDEV); usb_nevents--; ueqi_next = TAILQ_FIRST(&usb_events); } } } if (usb_nevents >= USB_MAX_EVENTS) { /* Too many queued events, drop an old one. */ DPRINTF(("usb: event dropped\n")); usb_get_next_event(&ue); } TAILQ_INSERT_TAIL(&usb_events, ueq, next); usb_nevents++; wakeup(&usb_events); selwakeup(&usb_selevent); if (usb_async_proc != NULL) { ksignal(usb_async_proc, SIGIO); } crit_exit(); } void usb_schedsoftintr(usbd_bus_handle bus) { DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); #ifdef USB_USE_SOFTINTR if (bus->use_polling) { bus->methods->soft_intr(bus); } else { #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS softintr_schedule(bus->soft); #else if (!callout_pending(&bus->softi)) callout_reset(&bus->softi, 0, bus->methods->soft_intr, bus); #endif /* __HAVE_GENERIC_SOFT_INTERRUPTS */ } #else bus->methods->soft_intr(bus); #endif /* USB_USE_SOFTINTR */ } static int usb_detach(device_t self) { struct usb_softc *sc = device_get_softc(self); struct usb_event ue; DPRINTF(("usb_detach: start\n")); sc->sc_dying = 1; /* Make all devices disconnect. */ if (sc->sc_port.device != NULL) usb_disconnect_port(&sc->sc_port, self); /* Kill off event thread. */ if (sc->sc_event_thread != NULL) { wakeup(&sc->sc_bus->needs_explore); if (tsleep(sc, 0, "usbdet", hz * 60)) kprintf("%s: event thread didn't die\n", device_get_nameunit(sc->sc_dev)); DPRINTF(("usb_detach: event thread dead\n")); } destroy_dev(sc->sc_usbdev); if (--usb_ndevs == 0) { int i; destroy_dev(usb_dev); usb_dev = NULL; for (i = 0; i < USB_NUM_TASKQS; i++) { struct usb_taskq *taskq = &usb_taskq[i]; wakeup(&taskq->tasks); if (tsleep(&taskq->taskcreated, 0, "usbtdt", hz * 60)) { kprintf("usb task thread %s didn't die\n", taskq->name); } } } usbd_finish(); #ifdef USB_USE_SOFTINTR #ifdef __HAVE_GENERIC_SOFT_INTERRUPTS if (sc->sc_bus->soft != NULL) { softintr_disestablish(sc->sc_bus->soft); sc->sc_bus->soft = NULL; } #else callout_stop(&sc->sc_bus->softi); #endif #endif ue.u.ue_ctrlr.ue_bus = device_get_unit(sc->sc_dev); usb_add_event(USB_EVENT_CTRLR_DETACH, &ue); return (0); } static void usb_child_detached(device_t self, device_t child) { struct usb_softc *sc = device_get_softc(self); /* XXX, should check it is the right device. */ sc->sc_port.device = NULL; } DRIVER_MODULE(usb, ohci, usb_driver, usb_devclass, 0, 0); DRIVER_MODULE(usb, uhci, usb_driver, usb_devclass, 0, 0); DRIVER_MODULE(usb, ehci, usb_driver, usb_devclass, 0, 0);