/* $NetBSD: usb.c,v 1.44 2000/04/27 15:26:49 augustss Exp $ */ /* $FreeBSD: src/sys/dev/usb/usb.c,v 1.20 1999/11/17 22:33:46 n_hibma 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/data/ and * http://www.usb.org/developers/index.html . */ #include #include #include #include #if defined(__NetBSD__) || defined(__OpenBSD__) #include #include #include #elif defined(__FreeBSD__) #include #include #include #include #endif #include #include #include #include #include #include #include #include #define USB_DEV_MINOR 255 #if defined(__FreeBSD__) 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" #endif /* defined(__FreeBSD__) */ #include #include #include #ifdef USB_DEBUG #define DPRINTF(x) if (usbdebug) logprintf x #define DPRINTFN(n,x) if (usbdebug>(n)) logprintf x int usbdebug = 0; #ifdef UHCI_DEBUG int uhcidebug; #endif #ifdef OHCI_DEBUG int ohcidebug; #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 { USBBASEDEVICE sc_dev; /* base device */ usbd_bus_handle sc_bus; /* USB controller */ struct usbd_port sc_port; /* dummy port for root hub */ #if defined(__FreeBSD__) /* This part should be deleted when kthreads is available */ struct selinfo sc_consel; /* waiting for connect change */ #else struct proc *sc_event_thread; #endif char sc_dying; }; #if defined(__NetBSD__) || defined(__OpenBSD__) cdev_decl(usb); #elif defined(__FreeBSD__) d_open_t usbopen; d_close_t usbclose; d_read_t usbread; d_ioctl_t usbioctl; int usbpoll __P((dev_t, int, struct proc *)); struct cdevsw usb_cdevsw = { /* open */ usbopen, /* close */ usbclose, /* read */ noread, /* write */ nowrite, /* ioctl */ usbioctl, /* poll */ usbpoll, /* mmap */ nommap, /* strategy */ nostrategy, /* name */ "usb", /* maj */ USB_CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ 0, /* bmaj */ -1 }; #endif Static usbd_status usb_discover __P((struct usb_softc *)); Static void usb_create_event_thread __P((void *)); Static void usb_event_thread __P((void *)); #define USB_MAX_EVENTS 100 struct usb_event_q { struct usb_event ue; SIMPLEQ_ENTRY(usb_event_q) next; }; Static SIMPLEQ_HEAD(, usb_event_q) usb_events = SIMPLEQ_HEAD_INITIALIZER(usb_events); Static int usb_nevents = 0; Static struct selinfo usb_selevent; Static struct proc *usb_async_proc; /* process who wants USB SIGIO */ Static int usb_dev_open = 0; Static void usb_add_event __P((int, struct usb_event *)); Static int usb_get_next_event __P((struct usb_event *)); #if defined(__NetBSD__) || defined(__OpenBSD__) /* Flag to see if we are in the cold boot process. */ extern int cold; #endif Static const char *usbrev_str[] = USBREV_STR; USB_DECLARE_DRIVER(usb); USB_MATCH(usb) { DPRINTF(("usbd_match\n")); return (UMATCH_GENERIC); } USB_ATTACH(usb) { #if defined(__NetBSD__) || defined(__OpenBSD__) struct usb_softc *sc = (struct usb_softc *)self; #elif defined(__FreeBSD__) struct usb_softc *sc = device_get_softc(self); void *aux = device_get_ivars(self); #endif usbd_device_handle dev; usbd_status err; int usbrev; struct usb_event ue; #if defined(__FreeBSD__) printf("%s", USBDEVNAME(sc->sc_dev)); sc->sc_dev = self; #endif 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]); if (usbrev != USBREV_1_0 && usbrev != USBREV_1_1) { printf(", not supported\n"); USB_ATTACH_ERROR_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 = USBDEVUNIT(sc->sc_dev); usb_add_event(USB_EVENT_CTRLR_ATTACH, &ue); err = usbd_new_device(USBDEV(sc->sc_dev), sc->sc_bus, 0, 0, 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", USBDEVNAME(sc->sc_dev)); USB_ATTACH_ERROR_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", USBDEVNAME(sc->sc_dev), err); sc->sc_dying = 1; } if (cold) sc->sc_bus->use_polling--; config_pending_incr(); usb_kthread_create(usb_create_event_thread, sc); #if defined(__FreeBSD__) make_dev(&usb_cdevsw, device_get_unit(self), UID_ROOT, GID_OPERATOR, 0644, "usb%d", device_get_unit(self)); #endif USB_ATTACH_SUCCESS_RETURN; } #if defined(__NetBSD__) || defined(__OpenBSD__) void usb_create_event_thread(arg) void *arg; { struct usb_softc *sc = arg; if (usb_kthread_create1(usb_event_thread, sc, &sc->sc_event_thread, "%s", sc->sc_dev.dv_xname)) { printf("%s: unable to create event thread for\n", sc->sc_dev.dv_xname); panic("usb_create_event_thread"); } } void usb_event_thread(arg) void *arg; { struct usb_softc *sc = arg; int first = 1; DPRINTF(("usb_event_thread: start\n")); /* Make sure first discover does something. */ sc->sc_bus->needs_explore = 1; while (!sc->sc_dying) { #ifdef USB_DEBUG if (usb_noexplore < 2) #endif usb_discover(sc); if (first) { config_pending_decr(); first = 0; } (void)tsleep(&sc->sc_bus->needs_explore, PWAIT, "usbevt", #ifdef USB_DEBUG usb_noexplore ? 0 : #endif hz*60 ); DPRINTFN(2,("usb_event_thread: woke up\n")); } sc->sc_event_thread = 0; /* In case parent is waiting for us to exit. */ wakeup(sc); DPRINTF(("usb_event_thread: exit\n")); kthread_exit(0); } int usbctlprint(aux, pnp) void *aux; const char *pnp; { /* only "usb"es can attach to host controllers */ if (pnp) printf("usb at %s", pnp); return (UNCONF); } #endif /* defined(__NetBSD__) || defined(__OpenBSD__) */ int usbopen(dev, flag, mode, p) dev_t dev; int flag, 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); } USB_GET_SC_OPEN(usb, unit, sc); if (sc->sc_dying) return (EIO); return (0); } int usbread(dev, uio, flag) 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, flag, mode, p) dev_t dev; int flag, 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(devt, cmd, data, flag, p) dev_t devt; u_long cmd; caddr_t data; int flag; struct proc *p; { struct usb_softc *sc; int unit = minor(devt); 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); } } USB_GET_SC(usb, unit, sc); if (sc->sc_dying) return (EIO); switch (cmd) { #if defined(__FreeBSD__) /* This part should be deleted when kthreads is available */ case USB_DISCOVER: usb_discover(sc); break; #endif #ifdef USB_DEBUG case USB_SETDEBUG: usbdebug = ((*(int *)data) & 0x000000ff); #ifdef UHCI_DEBUG uhcidebug = ((*(int *)data) & 0x0000ff00) >> 8; #endif #ifdef OHCI_DEBUG ohcidebug = ((*(int *)data) & 0x00ff0000) >> 16; #endif break; #endif case USB_REQUEST: { struct usb_ctl_request *ur = (void *)data; int len = UGETW(ur->request.wLength); struct iovec iov; struct uio uio; void *ptr = 0; int addr = ur->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->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->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->request, ptr, ur->flags, &ur->actlen); 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->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); break; } case USB_DEVICESTATS: *(struct usb_device_stats *)data = sc->sc_bus->stats; break; default: return (EINVAL); } return (0); } int usbpoll(dev, events, p) 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 { #if defined(__FreeBSD__) /* This part should be deleted when kthreads is available */ struct usb_softc *sc; int unit = minor(dev); USB_GET_SC(usb, unit, sc); revents = 0; mask = POLLOUT | POLLRDNORM; s = splusb(); if (events & mask && sc->sc_bus->needs_explore) revents |= events & mask; if (revents == 0 && events & mask) selrecord(p, &sc->sc_consel); splx(s); return (revents); #else return (ENXIO); #endif } } /* Explore device tree from the root. */ usbd_status usb_discover(sc) struct usb_softc *sc; { #if defined(__FreeBSD__) /* The splxxx parts should be deleted when kthreads is available */ int s; #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. */ #if defined(__FreeBSD__) s = splusb(); #endif while (sc->sc_bus->needs_explore && !sc->sc_dying) { sc->sc_bus->needs_explore = 0; #if defined(__FreeBSD__) splx(s); #endif sc->sc_bus->root_hub->hub->explore(sc->sc_bus->root_hub); #if defined(__FreeBSD__) s = splusb(); #endif } #if defined(__FreeBSD__) splx(s); #endif return (USBD_NORMAL_COMPLETION); } void usb_needs_explore(bus) usbd_bus_handle bus; { bus->needs_explore = 1; #if defined(__FreeBSD__) /* This part should be deleted when kthreads is available */ selwakeup(&bus->usbctl->sc_consel); #endif wakeup(&bus->needs_explore); } /* Called at splusb() */ int usb_get_next_event(ue) struct usb_event *ue; { struct usb_event_q *ueq; if (usb_nevents <= 0) return (0); ueq = SIMPLEQ_FIRST(&usb_events); *ue = ueq->ue; SIMPLEQ_REMOVE_HEAD(&usb_events, ueq, next); free(ueq, M_USBDEV); usb_nevents--; return (1); } void usbd_add_dev_event(type, udev) int type; usbd_device_handle udev; { struct usb_event ue; usbd_fill_deviceinfo(udev, &ue.u.ue_device); usb_add_event(type, &ue); } void usbd_add_drv_event(type, udev, dev) int type; usbd_device_handle udev; device_ptr_t dev; { struct usb_event ue; ue.u.ue_driver.ue_cookie = udev->cookie; strncpy(ue.u.ue_driver.ue_devname, USBDEVPTRNAME(dev), sizeof ue.u.ue_driver.ue_devname); usb_add_event(type, &ue); } Static void usb_add_event(type, uep) int type; struct usb_event *uep; { struct usb_event_q *ueq; struct usb_event ue; struct timeval thetime; int s; microtime(&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; TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time); 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(bus) struct usbd_bus *bus; { bus->methods->soft_intr(bus); } #if defined(__NetBSD__) || defined(__OpenBSD__) int usb_activate(self, act) device_ptr_t self; enum devact 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: return (EOPNOTSUPP); break; case DVACT_DEACTIVATE: sc->sc_dying = 1; if (dev && dev->cdesc && dev->subdevs) { for (i = 0; dev->subdevs[i]; i++) rv |= config_deactivate(dev->subdevs[i]); } break; } return (rv); } int usb_detach(self, flags) device_ptr_t 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) usb_disconnect_port(&sc->sc_port, self); /* Kill off event thread. */ if (sc->sc_event_thread) { wakeup(&sc->sc_bus->needs_explore); if (tsleep(sc, PWAIT, "usbdet", hz * 60)) printf("%s: event thread didn't die\n", USBDEVNAME(sc->sc_dev)); DPRINTF(("usb_detach: event thread dead\n")); } usbd_finish(); ue.u.ue_ctrlr.ue_bus = USBDEVUNIT(sc->sc_dev); usb_add_event(USB_EVENT_CTRLR_DETACH, &ue); return (0); } #elif defined(__FreeBSD__) int usb_detach(device_t self) { DPRINTF(("%s: unload, prevented\n", USBDEVNAME(self))); return (EINVAL); } #endif #if defined(__FreeBSD__) DRIVER_MODULE(usb, ohci, usb_driver, usb_devclass, 0, 0); DRIVER_MODULE(usb, uhci, usb_driver, usb_devclass, 0, 0); #endif