/* $OpenBSD: usb.c,v 1.62 2009/11/09 17:53:39 nicm Exp $ */ /* $NetBSD: usb.c,v 1.77 2003/01/01 00:10:26 thorpej Exp $ */ /* * Copyright (c) 1998, 2002 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. * * 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 "ohci.h" #include "uhci.h" #include "ehci.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define USB_DEV_MINOR 255 #include #include #include #ifdef USB_DEBUG #define DPRINTF(x) do { if (usbdebug) printf x; } while (0) #define DPRINTFN(n,x) do { if (usbdebug>(n)) printf x; } while (0) int usbdebug = 0; #if defined(UHCI_DEBUG) && NUHCI > 0 extern int uhcidebug; #endif #if defined(OHCI_DEBUG) && NOHCI > 0 extern int ohcidebug; #endif #if defined(EHCI_DEBUG) && NEHCI > 0 extern int ehcidebug; #endif /* * 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 { struct device sc_dev; /* base device */ usbd_bus_handle sc_bus; /* USB controller */ struct usbd_port sc_port; /* dummy port for root hub */ struct proc *sc_event_thread; char sc_dying; }; TAILQ_HEAD(, usb_task) usb_all_tasks; volatile int threads_pending = 0; void usb_discover(void *); void usb_create_event_thread(void *); void usb_event_thread(void *); void usb_task_thread(void *); struct proc *usb_task_thread_proc = NULL; #define USB_MAX_EVENTS 100 struct usb_event_q { struct usb_event ue; SIMPLEQ_ENTRY(usb_event_q) next; }; SIMPLEQ_HEAD(, usb_event_q) usb_events = SIMPLEQ_HEAD_INITIALIZER(usb_events); int usb_nevents = 0; struct selinfo usb_selevent; struct proc *usb_async_proc; /* process that wants USB SIGIO */ int usb_dev_open = 0; void usb_add_event(int, struct usb_event *); int usb_get_next_event(struct usb_event *); const char *usbrev_str[] = USBREV_STR; int usb_match(struct device *, void *, void *); void usb_attach(struct device *, struct device *, void *); int usb_detach(struct device *, int); int usb_activate(struct device *, int); struct cfdriver usb_cd = { NULL, "usb", DV_DULL }; const struct cfattach usb_ca = { sizeof(struct usb_softc), usb_match, usb_attach, usb_detach, usb_activate, }; int usb_match(struct device *parent, void *match, void *aux) { DPRINTF(("usbd_match\n")); return (UMATCH_GENERIC); } void usb_attach(struct device *parent, struct device *self, void *aux) { struct usb_softc *sc = (struct usb_softc *)self; usbd_device_handle dev; usbd_status err; int usbrev; int speed; struct usb_event ue; DPRINTF(("usbd_attach\n")); usbd_init(); sc->sc_bus = aux; sc->sc_bus->usbctl = sc; sc->sc_port.power = USB_MAX_POWER; usbrev = sc->sc_bus->usbrev; printf(": 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: printf(", not supported\n"); sc->sc_dying = 1; return; } printf("\n"); /* Make sure not to use tsleep() if we are cold booting. */ if (cold) sc->sc_bus->use_polling++; ue.u.ue_ctrlr.ue_bus = sc->sc_dev.dv_unit; usb_add_event(USB_EVENT_CTRLR_ATTACH, &ue); /* 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) { printf("%s: can't register softintr\n", sc->sc_dev.dv_xname); sc->sc_dying = 1; return; } 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; printf("%s: root device is not a hub\n", sc->sc_dev.dv_xname); return; } 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 && (sc->sc_dev.dv_cfdata->cf_flags & 1)) dev->hub->explore(sc->sc_bus->root_hub); #endif } else { printf("%s: root hub problem, error=%d\n", sc->sc_dev.dv_xname, err); sc->sc_dying = 1; } if (cold) sc->sc_bus->use_polling--; config_pending_incr(); kthread_create_deferred(usb_create_event_thread, sc); } void usb_create_event_thread(void *arg) { struct usb_softc *sc = arg; static int created = 0; if (sc->sc_bus->usbrev == USBREV_2_0) threads_pending++; if (kthread_create(usb_event_thread, sc, &sc->sc_event_thread, "%s", sc->sc_dev.dv_xname)) panic("unable to create event thread for %s", sc->sc_dev.dv_xname); if (!created) { created = 1; TAILQ_INIT(&usb_all_tasks); if (kthread_create(usb_task_thread, NULL, &usb_task_thread_proc, "usbtask")) panic("unable to create usb task thread"); } } /* * 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 s; s = splusb(); if (!task->onqueue) { DPRINTFN(2,("usb_add_task: task=%p\n", task)); TAILQ_INSERT_TAIL(&usb_all_tasks, task, next); task->onqueue = 1; } else { DPRINTFN(3,("usb_add_task: task=%p on q\n", task)); } wakeup(&usb_all_tasks); splx(s); } void usb_rem_task(usbd_device_handle dev, struct usb_task *task) { int s; s = splusb(); if (task->onqueue) { TAILQ_REMOVE(&usb_all_tasks, task, next); task->onqueue = 0; } splx(s); } void usb_event_thread(void *arg) { struct usb_softc *sc = arg; int pwrdly; DPRINTF(("usb_event_thread: start\n")); /* Wait for power to come good. */ pwrdly = sc->sc_bus->root_hub->hub->hubdesc.bPwrOn2PwrGood * UHD_PWRON_FACTOR + USB_EXTRA_POWER_UP_TIME; usb_delay_ms(sc->sc_bus, pwrdly); /* USB1 threads wait for USB2 threads to finish their first probe. */ while (sc->sc_bus->usbrev != USBREV_2_0 && threads_pending) (void)tsleep((void *)&threads_pending, PWAIT, "config", 0); /* Make sure first discover does something. */ sc->sc_bus->needs_explore = 1; usb_discover(sc); config_pending_decr(); /* Wake up any companions waiting for handover before their probes. */ if (sc->sc_bus->usbrev == USBREV_2_0) { threads_pending--; wakeup((void *)&threads_pending); } while (!sc->sc_dying) { #ifdef USB_DEBUG if (usb_noexplore < 2) #endif usb_discover(sc); #ifdef USB_DEBUG (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", usb_noexplore ? 0 : hz * 60); #else (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", hz * 60); #endif DPRINTFN(2,("usb_event_thread: woke up\n")); } sc->sc_event_thread = NULL; /* In case parent is waiting for us to exit. */ wakeup(sc); DPRINTF(("usb_event_thread: exit\n")); kthread_exit(0); } void usb_task_thread(void *arg) { struct usb_task *task; int s; DPRINTF(("usb_task_thread: start\n")); s = splusb(); for (;;) { task = TAILQ_FIRST(&usb_all_tasks); if (task == NULL) { tsleep(&usb_all_tasks, PWAIT, "usbtsk", 0); task = TAILQ_FIRST(&usb_all_tasks); } DPRINTFN(2,("usb_task_thread: woke up task=%p\n", task)); if (task != NULL) { TAILQ_REMOVE(&usb_all_tasks, task, next); task->onqueue = 0; splx(s); task->fun(task->arg); s = splusb(); } } } int usbctlprint(void *aux, const char *pnp) { /* only "usb"es can attach to host controllers */ if (pnp) printf("usb at %s", pnp); return (UNCONF); } int usbopen(dev_t dev, int flag, int mode, struct proc *p) { int unit = minor(dev); struct usb_softc *sc; if (unit == USB_DEV_MINOR) { if (usb_dev_open) return (EBUSY); usb_dev_open = 1; usb_async_proc = 0; return (0); } if (unit >= usb_cd.cd_ndevs) return (ENXIO); sc = usb_cd.cd_devs[unit]; if (sc == NULL) return (ENXIO); if (sc->sc_dying) return (EIO); return (0); } int usbread(dev_t dev, struct uio *uio, int flag) { struct usb_event ue; int s, error, n; if (minor(dev) != USB_DEV_MINOR) return (ENXIO); if (uio->uio_resid != sizeof(struct usb_event)) return (EINVAL); error = 0; s = splusb(); for (;;) { n = usb_get_next_event(&ue); if (n != 0) break; if (flag & IO_NDELAY) { error = EWOULDBLOCK; break; } error = tsleep(&usb_events, PZERO | PCATCH, "usbrea", 0); if (error) break; } splx(s); if (!error) error = uiomove((void *)&ue, uio->uio_resid, uio); return (error); } int usbclose(dev_t dev, int flag, int mode, struct proc *p) { int unit = minor(dev); if (unit == USB_DEV_MINOR) { usb_async_proc = 0; usb_dev_open = 0; } return (0); } int usbioctl(dev_t devt, u_long cmd, caddr_t data, int flag, struct proc *p) { struct usb_softc *sc; int unit = minor(devt); int error; if (unit == USB_DEV_MINOR) { switch (cmd) { case FIONBIO: /* All handled in the upper FS layer. */ return (0); case FIOASYNC: if (*(int *)data) usb_async_proc = p; else usb_async_proc = 0; return (0); default: return (EINVAL); } } sc = usb_cd.cd_devs[unit]; if (sc->sc_dying) return (EIO); error = 0; switch (cmd) { #ifdef USB_DEBUG case USB_SETDEBUG: /* only root can access to these debug flags */ if ((error = suser(curproc, 0)) != 0) return (error); if (!(flag & FWRITE)) return (EBADF); usbdebug = ((*(unsigned int *)data) & 0x000000ff); #if defined(UHCI_DEBUG) && NUHCI > 0 uhcidebug = ((*(unsigned int *)data) & 0x0000ff00) >> 8; #endif #if defined(OHCI_DEBUG) && NOHCI > 0 ohcidebug = ((*(unsigned int *)data) & 0x00ff0000) >> 16; #endif #if defined(EHCI_DEBUG) && NEHCI > 0 ehcidebug = ((*(unsigned int *)data) & 0xff000000) >> 24; #endif break; #endif /* USB_DEBUG */ case USB_REQUEST: { struct usb_ctl_request *ur = (void *)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; if (!(flag & FWRITE)) return (EBADF); 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_procp = p; ptr = malloc(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) free(ptr, M_TEMP); return (error); } case USB_DEVICEINFO: { struct usb_device_info *di = (void *)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 *)data = sc->sc_bus->stats; break; default: return (EINVAL); } return (0); } int usbpoll(dev_t dev, int events, struct proc *p) { int revents, mask, s; if (minor(dev) == USB_DEV_MINOR) { revents = 0; mask = POLLIN | POLLRDNORM; s = splusb(); if (events & mask && usb_nevents > 0) revents |= events & mask; if (revents == 0 && events & mask) selrecord(p, &usb_selevent); splx(s); return (revents); } else { return (POLLERR); } } void filt_usbrdetach(struct knote *); int filt_usbread(struct knote *, long); int usbkqfilter(dev_t, struct knote *); void filt_usbrdetach(struct knote *kn) { int s; s = splusb(); SLIST_REMOVE(&usb_selevent.si_note, kn, knote, kn_selnext); splx(s); } int filt_usbread(struct knote *kn, long hint) { if (usb_nevents == 0) return (0); kn->kn_data = sizeof(struct usb_event); return (1); } struct filterops usbread_filtops = { 1, NULL, filt_usbrdetach, filt_usbread }; int usbkqfilter(dev_t dev, struct knote *kn) { struct klist *klist; int s; switch (kn->kn_filter) { case EVFILT_READ: if (minor(dev) != USB_DEV_MINOR) return (1); klist = &usb_selevent.si_note; kn->kn_fop = &usbread_filtops; break; default: return (1); } kn->kn_hook = NULL; s = splusb(); SLIST_INSERT_HEAD(klist, kn, kn_selnext); splx(s); return (0); } /* Explore device tree from the root. */ 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. */ while (sc->sc_bus->needs_explore && !sc->sc_dying) { sc->sc_bus->needs_explore = 0; sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); } } void usb_needs_explore(usbd_device_handle dev) { DPRINTFN(2,("usb_needs_explore\n")); dev->bus->needs_explore = 1; wakeup(&dev->bus->needs_explore); } void usb_needs_reattach(usbd_device_handle dev) { DPRINTFN(2,("usb_needs_reattach\n")); dev->powersrc->reattach = 1; dev->bus->needs_explore = 1; wakeup(&dev->bus->needs_explore); } /* Called at splusb() */ int usb_get_next_event(struct usb_event *ue) { struct usb_event_q *ueq; if (usb_nevents <= 0) return (0); ueq = SIMPLEQ_FIRST(&usb_events); #ifdef DIAGNOSTIC if (ueq == NULL) { printf("usb: usb_nevents got out of sync! %d\n", usb_nevents); usb_nevents = 0; return (0); } #endif *ue = ueq->ue; SIMPLEQ_REMOVE_HEAD(&usb_events, next); free(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, struct device *dev) { struct usb_event ue; ue.u.ue_driver.ue_cookie = udev->cookie; strncpy(ue.u.ue_driver.ue_devname, dev->dv_xname, 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 timespec thetime; int s; nanotime(&thetime); /* Don't want to wait here inside splusb() */ ueq = malloc(sizeof *ueq, M_USBDEV, M_WAITOK); ueq->ue = *uep; ueq->ue.ue_type = type; ueq->ue.ue_time = thetime; s = splusb(); if (++usb_nevents >= USB_MAX_EVENTS) { /* Too many queued events, drop an old one. */ DPRINTFN(-1,("usb: event dropped\n")); (void)usb_get_next_event(&ue); } SIMPLEQ_INSERT_TAIL(&usb_events, ueq, next); wakeup(&usb_events); selwakeup(&usb_selevent); if (usb_async_proc != NULL) psignal(usb_async_proc, SIGIO); splx(s); } void usb_schedsoftintr(usbd_bus_handle bus) { DPRINTFN(10,("usb_schedsoftintr: polling=%d\n", bus->use_polling)); if (bus->use_polling) { bus->methods->soft_intr(bus); } else { softintr_schedule(bus->soft); } } int usb_activate(struct device *self, int act) { struct usb_softc *sc = (struct usb_softc *)self; usbd_device_handle dev = sc->sc_port.device; int i, rv = 0; switch (act) { case DVACT_ACTIVATE: break; case DVACT_DEACTIVATE: sc->sc_dying = 1; if (dev != NULL && dev->cdesc != NULL && dev->subdevs != NULL) { for (i = 0; dev->subdevs[i]; i++) rv |= config_deactivate(dev->subdevs[i]); } break; } return (rv); } int usb_detach(struct device *self, int flags) { struct usb_softc *sc = (struct usb_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, PWAIT, "usbdet", hz * 60)) printf("%s: event thread didn't die\n", sc->sc_dev.dv_xname); DPRINTF(("usb_detach: event thread dead\n")); } usbd_finish(); if (sc->sc_bus->soft != NULL) { softintr_disestablish(sc->sc_bus->soft); sc->sc_bus->soft = NULL; } ue.u.ue_ctrlr.ue_bus = sc->sc_dev.dv_unit; usb_add_event(USB_EVENT_CTRLR_DETACH, &ue); return (0); }