freebsd-dev/sys/dev/usb/usb.c
Ian Dowse 9145721957 Use a different task queue for host controller and peripheral driver
tasks. Since the host controllers rely on tasks to process transfer
timeouts, if a synchronous transfer from a driver was invoked from
a task and timed out, it would never complete because the single
task thread was stuck performing the synchronous transfer so couldn't
process the timeout.

This affected the axe, udav and ural drivers.

Problem hardware provided by:	guido
2006-10-19 01:15:58 +00:00

1023 lines
24 KiB
C

/* $NetBSD: usb.c,v 1.68 2002/02/20 20:30:12 christos 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 $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#if __FreeBSD_version >= 500000
#include <sys/mutex.h>
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/device.h>
#elif defined(__FreeBSD__)
#include <sys/unistd.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <sys/uio.h>
#endif
#include <sys/kthread.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/poll.h>
#if __FreeBSD_version >= 500014
#include <sys/selinfo.h>
#else
#include <sys/select.h>
#endif
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#define USBUNIT(d) (minor(d)) /* usb_discover device nodes, kthread */
#define USB_DEV_MINOR 255 /* event queue device */
#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 <machine/bus.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_quirks.h>
/* 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) logprintf x
#define DPRINTFN(n,x) if (usbdebug>(n)) logprintf 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 */
#ifdef __FreeBSD__
struct cdev *sc_usbdev; /* /dev/usbN device */
TAILQ_ENTRY(usb_softc) sc_coldexplist; /* cold needs-explore list */
#endif
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;
};
struct usb_taskq {
TAILQ_HEAD(, usb_task) tasks;
struct proc *task_thread_proc;
const char *name;
int taskcreated; /* task thread exists. */
};
static struct usb_taskq usb_taskq[USB_NUM_TASKQS];
#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;
d_poll_t usbpoll;
struct cdevsw usb_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = usbopen,
.d_close = usbclose,
.d_read = usbread,
.d_ioctl = usbioctl,
.d_poll = usbpoll,
.d_name = "usb",
#if __FreeBSD_version < 500014
.d_bmaj = -1
#endif
};
#endif
static void usb_discover(void *);
#ifdef __FreeBSD__
static bus_child_detached_t usb_child_detached;
#endif
static void usb_create_event_thread(void *);
static void usb_event_thread(void *);
static void usb_task_thread(void *);
#ifdef __FreeBSD__
static struct cdev *usb_dev; /* The /dev/usb device. */
static int usb_ndevs; /* Number of /dev/usbN devices. */
/* Busses to explore at the end of boot-time device configuration. */
static TAILQ_HEAD(, usb_softc) usb_coldexplist =
TAILQ_HEAD_INITIALIZER(usb_coldexplist);
#endif
#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;
USB_DECLARE_DRIVER_INIT(usb,
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)
);
#if defined(__FreeBSD__)
MODULE_VERSION(usb, 1);
#endif
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;
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;
#if defined(__FreeBSD__)
printf("%s", device_get_nameunit(sc->sc_dev));
#endif
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;
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 = 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) {
printf("%s: can't register softintr\n", device_get_nameunit(sc->sc_dev));
sc->sc_dying = 1;
USB_ATTACH_ERROR_RETURN;
}
#else
usb_callout_init(sc->sc_bus->softi);
#endif
#endif
err = usbd_new_device(USBDEV(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",
device_get_nameunit(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 defined(__FreeBSD__)
if (cold) {
/* Explore high-speed busses before others. */
if (speed == USB_SPEED_HIGH)
dev->hub->explore(sc->sc_bus->root_hub);
else
TAILQ_INSERT_TAIL(&usb_coldexplist, sc,
sc_coldexplist);
}
#else
if (cold && (sc->sc_dev.dv_cfdata->cf_flags & 1))
dev->hub->explore(sc->sc_bus->root_hub);
#endif
#endif
} else {
printf("%s: root hub problem, error=%d\n",
device_get_nameunit(sc->sc_dev), err);
sc->sc_dying = 1;
}
if (cold)
sc->sc_bus->use_polling--;
config_pending_incr();
#if defined(__NetBSD__) || defined(__OpenBSD__)
usb_kthread_create(usb_create_event_thread, sc);
#endif
#if defined(__FreeBSD__)
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 */
sc->sc_usbdev = make_dev(&usb_cdevsw, device_get_unit(self), UID_ROOT,
GID_OPERATOR, 0660, "usb%d", device_get_unit(self));
if (usb_ndevs++ == 0) {
/* The device spitting out events */
usb_dev = make_dev(&usb_cdevsw, USB_DEV_MINOR, UID_ROOT,
GID_OPERATOR, 0660, "usb");
}
#endif
USB_ATTACH_SUCCESS_RETURN;
}
static const char *taskq_names[] = USB_TASKQ_NAMES;
void
usb_create_event_thread(void *arg)
{
struct usb_softc *sc = arg;
struct usb_taskq *taskq;
int i;
if (usb_kthread_create1(usb_event_thread, sc, &sc->sc_event_thread,
"%s", device_get_nameunit(sc->sc_dev))) {
printf("%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++) {
taskq = &usb_taskq[i];
if (taskq->taskcreated == 0) {
taskq->taskcreated = 1;
taskq->name = taskq_names[i];
TAILQ_INIT(&taskq->tasks);
if (usb_kthread_create2(usb_task_thread, taskq,
&taskq->task_thread_proc, taskq->name)) {
printf("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;
int s;
s = splusb();
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);
splx(s);
}
void
usb_rem_task(usbd_device_handle dev, struct usb_task *task)
{
struct usb_taskq *taskq;
int s;
s = splusb();
if (task->queue != -1) {
taskq = &usb_taskq[task->queue];
TAILQ_REMOVE(&taskq->tasks, task, next);
task->queue = -1;
}
splx(s);
}
void
usb_event_thread(void *arg)
{
static int newthread_wchan;
struct usb_softc *sc = arg;
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
mtx_lock(&Giant);
#endif
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. What we do here is wait until no new
* USB threads have been created in a while. XXX we actually
* just want to wait for the PCI slot to be fully scanned.
*
* Note that when you `kldload usb' it actually attaches the
* devices in order that the drivers appear in the kld, not the
* normal PCI order, since the addition of each driver within
* usb.ko (ohci, ehci etc.) causes a separate PCI bus re-scan.
*/
wakeup(&newthread_wchan);
for (;;) {
if (tsleep(&newthread_wchan , PWAIT, "usbets", hz * 4) != 0)
break;
}
/* Make sure first discover does something. */
sc->sc_bus->needs_explore = 1;
usb_discover(sc);
config_pending_decr();
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;
struct usb_taskq *taskq;
int s;
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
mtx_lock(&Giant);
#endif
taskq = arg;
DPRINTF(("usb_task_thread: start taskq %s\n", taskq->name));
s = splusb();
while (usb_ndevs > 0) {
task = TAILQ_FIRST(&taskq->tasks);
if (task == NULL) {
tsleep(&taskq->tasks, PWAIT, "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;
splx(s);
task->fun(task->arg);
s = splusb();
}
}
splx(s);
taskq->taskcreated = 0;
wakeup(&taskq->taskcreated);
DPRINTF(("usb_event_thread: exit\n"));
kthread_exit(0);
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
int
usbctlprint(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(struct cdev *dev, int flag, int mode, usb_proc_ptr p)
{
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 = 0;
return (0);
}
USB_GET_SC_OPEN(usb, unit, sc);
if (sc->sc_dying)
return (EIO);
return (0);
}
int
usbread(struct cdev *dev, struct uio *uio, int flag)
{
struct usb_event ue;
int unit = USBUNIT(dev);
int s, error, n;
if (unit != USB_DEV_MINOR)
return (ENODEV);
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 & O_NONBLOCK) {
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(struct cdev *dev, int flag, int mode, usb_proc_ptr p)
{
int unit = USBUNIT(dev);
if (unit == USB_DEV_MINOR) {
usb_async_proc = 0;
usb_dev_open = 0;
}
return (0);
}
int
usbioctl(struct cdev *devt, u_long cmd, caddr_t data, int flag, usb_proc_ptr p)
{
struct usb_softc *sc;
int unit = USBUNIT(devt);
if (unit == USB_DEV_MINOR) {
switch (cmd) {
case FIONBIO:
/* All handled in the upper FS layer. */
return (0);
case FIOASYNC:
if (*(int *)data)
#if __FreeBSD_version >= 500000
usb_async_proc = p->td_proc;
#else
usb_async_proc = p;
#endif
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 */
case USB_DISCOVER:
break;
#endif
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;
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 = 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(struct cdev *dev, int events, usb_proc_ptr p)
{
int revents, mask, s;
int unit = USBUNIT(dev);
if (unit == 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__)
return (0); /* select/poll never wakes up - back compat */
#else
return (ENXIO);
#endif
}
}
/* Explore device tree from the root. */
static void
usb_discover(void *v)
{
struct usb_softc *sc = v;
#if defined(__FreeBSD__)
/* splxxx should be changed to mutexes for preemption safety some day */
int s;
#endif
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.
*/
#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
}
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 at splusb() */
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) {
printf("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);
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, 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;
int s;
ueq = malloc(sizeof *ueq, M_USBDEV, M_WAITOK);
ueq->ue = *uep;
ueq->ue.ue_type = type;
microtime(&thetime);
TIMEVAL_TO_TIMESPEC(&thetime, &ueq->ue.ue_time);
s = splusb();
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);
free(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"));
(void)usb_get_next_event(&ue);
}
TAILQ_INSERT_TAIL(&usb_events, ueq, next);
usb_nevents++;
wakeup(&usb_events);
selwakeuppri(&usb_selevent, PZERO);
if (usb_async_proc != NULL) {
PROC_LOCK(usb_async_proc);
psignal(usb_async_proc, SIGIO);
PROC_UNLOCK(usb_async_proc);
}
splx(s);
}
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 */
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
int
usb_activate(device_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);
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);
}
#endif
USB_DETACH(usb)
{
USB_DETACH_START(usb, sc);
struct usb_event ue;
struct usb_taskq *taskq;
int i;
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",
device_get_nameunit(sc->sc_dev));
DPRINTF(("usb_detach: event thread dead\n"));
}
#ifdef __FreeBSD__
destroy_dev(sc->sc_usbdev);
if (--usb_ndevs == 0) {
destroy_dev(usb_dev);
usb_dev = NULL;
for (i = 0; i < USB_NUM_TASKQS; i++) {
taskq = &usb_taskq[i];
wakeup(&taskq->tasks);
if (tsleep(&taskq->taskcreated, PWAIT, "usbtdt",
hz * 60)) {
printf("usb task thread %s didn't die\n",
taskq->name);
}
}
}
#endif
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);
}
#if defined(__FreeBSD__)
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;
}
/* Explore USB busses at the end of device configuration. */
static void
usb_cold_explore(void *arg)
{
struct usb_softc *sc;
KASSERT(cold || TAILQ_EMPTY(&usb_coldexplist),
("usb_cold_explore: busses to explore when !cold"));
while (!TAILQ_EMPTY(&usb_coldexplist)) {
sc = TAILQ_FIRST(&usb_coldexplist);
TAILQ_REMOVE(&usb_coldexplist, sc, sc_coldexplist);
sc->sc_bus->use_polling++;
sc->sc_port.device->hub->explore(sc->sc_bus->root_hub);
sc->sc_bus->use_polling--;
}
}
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);
DRIVER_MODULE(usb, slhci, usb_driver, usb_devclass, 0, 0);
SYSINIT(usb_cold_explore, SI_SUB_CONFIGURE, SI_ORDER_MIDDLE,
usb_cold_explore, NULL);
#endif