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NetBSD/sys/dev/wscons/wsmux.c

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/* $NetBSD: wsmux.c,v 1.9 2000/05/28 10:33:14 takemura Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Author: Lennart Augustsson <augustss@carlstedt.se>
* 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.
*/
#include "wsmux.h"
#include "wsdisplay.h"
#include "wskbd.h"
#if NWSMUX > 0 || (NWSDISPLAY > 0 && NWSKBD > 0)
/*
* wscons mux device.
*
* The mux device is a collection of real mice and keyboards and acts as
* a merge point for all the events from the different real devices.
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/signalvar.h>
#include <sys/device.h>
#include "opt_wsdisplay_compat.h"
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wseventvar.h>
#include <dev/wscons/wscons_callbacks.h>
#include <dev/wscons/wsmuxvar.h>
#ifdef WSMUX_DEBUG
#define DPRINTF(x) if (wsmuxdebug) printf x
int wsmuxdebug = 0;
#else
#define DPRINTF(x)
#endif
struct wsplink {
LIST_ENTRY(wsplink) next;
int type;
struct wsmux_softc *mux; /* our mux device */
/* The rest of the fields reflect a value in the multiplexee. */
struct device *sc; /* softc */
struct wseventvar *sc_mevents; /* event var */
struct wsmux_softc **sc_muxp; /* pointer to us */
struct wsmuxops *sc_ops;
};
int wsmuxdoclose __P((struct device *, int, int, struct proc *));
int wsmux_set_display __P((struct device *, struct wsmux_softc *));
#if NWSMUX > 0
cdev_decl(wsmux);
void wsmuxattach __P((int));
struct wsmuxops wsmux_muxops = {
wsmuxopen, wsmuxdoclose, wsmuxdoioctl, wsmux_displayioctl,
wsmux_set_display
};
void wsmux_setmax __P((int n));
int nwsmux = 0;
struct wsmux_softc **wsmuxdevs;
void
wsmux_setmax(n)
int n;
{
int i;
if (n >= nwsmux) {
i = nwsmux;
nwsmux = n + 1;
if (nwsmux != 0)
wsmuxdevs = realloc(wsmuxdevs,
nwsmux * sizeof (*wsmuxdevs),
M_DEVBUF, M_NOWAIT);
else
wsmuxdevs = malloc(nwsmux * sizeof (*wsmuxdevs),
M_DEVBUF, M_NOWAIT);
if (wsmuxdevs == 0)
panic("wsmux_setmax: no memory\n");
for (; i < nwsmux; i++)
wsmuxdevs[i] = 0;
}
}
/* From upper level */
void
wsmuxattach(n)
int n;
{
int i;
wsmux_setmax(n); /* Make sure we have room for all muxes. */
/* Make sure all muxes are there. */
for (i = 0; i < nwsmux; i++)
if (!wsmuxdevs[i])
wsmuxdevs[i] = wsmux_create("wsmux", i);
}
/* From mouse or keyboard. */
void
wsmux_attach(n, type, dsc, ev, psp, ops)
int n;
int type;
struct device *dsc;
struct wseventvar *ev;
struct wsmux_softc **psp;
struct wsmuxops *ops;
{
struct wsmux_softc *sc;
int error;
DPRINTF(("wsmux_attach: n=%d\n", n));
wsmux_setmax(n);
sc = wsmuxdevs[n];
if (sc == 0) {
sc = wsmux_create("wsmux", n);
if (sc == 0) {
printf("wsmux: attach out of memory\n");
return;
}
wsmuxdevs[n] = sc;
}
error = wsmux_attach_sc(sc, type, dsc, ev, psp, ops);
if (error)
printf("wsmux_attach: error=%d\n", error);
}
/* From mouse or keyboard. */
void
wsmux_detach(n, dsc)
int n;
struct device *dsc;
{
#ifdef DIAGNOSTIC
int error;
if (n >= nwsmux || n < 0) {
printf("wsmux_detach: detach is out of range\n");
return;
}
if ((error = wsmux_detach_sc(wsmuxdevs[n], dsc)))
printf("wsmux_detach: error=%d\n", error);
#else
(void)wsmux_detach_sc(wsmuxdevs[n], dsc);
#endif
}
int
wsmuxopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
struct wsmux_softc *sc;
struct wsplink *m;
int unit, error, nopen, lasterror;
unit = minor(dev);
if (unit >= nwsmux || /* make sure it was attached */
(sc = wsmuxdevs[unit]) == NULL)
return (ENXIO);
DPRINTF(("wsmuxopen: %s: sc=%p\n", sc->sc_dv.dv_xname, sc));
if (!(flags & FREAD)) {
/* Not opening for read, only ioctl is available. */
return (0);
}
if (sc->sc_events.io)
return (EBUSY);
sc->sc_events.io = p;
sc->sc_flags = flags;
sc->sc_mode = mode;
sc->sc_p = p;
wsevent_init(&sc->sc_events); /* may cause sleep */
nopen = 0;
lasterror = 0;
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
if (!m->sc_mevents->io && !*m->sc_muxp) {
DPRINTF(("wsmuxopen: %s: m=%p dev=%s\n",
sc->sc_dv.dv_xname, m, m->sc->dv_xname));
error = m->sc_ops->dopen(makedev(0, m->sc->dv_unit),
flags, mode, p);
if (error) {
/* Ignore opens that fail */
lasterror = error;
DPRINTF(("wsmuxopen: open failed %d\n",
error));
} else {
nopen++;
*m->sc_muxp = sc;
}
}
}
if (nopen == 0 && lasterror != 0) {
wsevent_fini(&sc->sc_events);
sc->sc_events.io = NULL;
return (lasterror);
}
return (0);
}
int
wsmuxclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
return wsmuxdoclose(&wsmuxdevs[minor(dev)]->sc_dv, flags, mode, p);
}
int
wsmuxread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
struct wsmux_softc *sc = wsmuxdevs[minor(dev)];
if (!sc->sc_events.io)
return (EACCES);
return (wsevent_read(&sc->sc_events, uio, flags));
}
int
wsmuxioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
return wsmuxdoioctl(&wsmuxdevs[minor(dev)]->sc_dv, cmd, data, flag, p);
}
int
wsmuxpoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
struct wsmux_softc *sc = wsmuxdevs[minor(dev)];
if (!sc->sc_events.io)
return (EACCES);
return (wsevent_poll(&sc->sc_events, events, p));
}
int
wsmux_add_mux(unit, muxsc)
int unit;
struct wsmux_softc *muxsc;
{
struct wsmux_softc *sc, *m;
if (unit < 0 || unit >= nwsmux || (sc = wsmuxdevs[unit]) == NULL)
return (ENXIO);
DPRINTF(("wsmux_add_mux: %s to %s\n", sc->sc_dv.dv_xname,
muxsc->sc_dv.dv_xname));
if (sc->sc_mux || sc->sc_events.io)
return (EBUSY);
/* The mux we are adding must not be an ancestor of it. */
for (m = muxsc->sc_mux; m; m = m->sc_mux)
if (m == sc)
return (EINVAL);
return (wsmux_attach_sc(muxsc, WSMUX_MUX, &sc->sc_dv, &sc->sc_events,
&sc->sc_mux, &wsmux_muxops));
}
int
wsmux_rem_mux(unit, muxsc)
int unit;
struct wsmux_softc *muxsc;
{
struct wsmux_softc *sc;
if (unit < 0 || unit >= nwsmux || (sc = wsmuxdevs[unit]) == NULL)
return (ENXIO);
DPRINTF(("wsmux_rem_mux: %s from %s\n", sc->sc_dv.dv_xname,
muxsc->sc_dv.dv_xname));
return (wsmux_detach_sc(muxsc, &sc->sc_dv));
}
#endif /* NWSMUX > 0 */
struct wsmux_softc *
wsmux_create(name, unit)
const char *name;
int unit;
{
struct wsmux_softc *sc;
DPRINTF(("wsmux_create: allocating\n"));
sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT);
if (!sc)
return (0);
memset(sc, 0, sizeof *sc);
LIST_INIT(&sc->sc_reals);
snprintf(sc->sc_dv.dv_xname, sizeof sc->sc_dv.dv_xname,
"%s%d", name, unit);
sc->sc_dv.dv_unit = unit;
return (sc);
}
int
wsmux_attach_sc(sc, type, dsc, ev, psp, ops)
struct wsmux_softc *sc;
int type;
struct device *dsc;
struct wseventvar *ev;
struct wsmux_softc **psp;
struct wsmuxops *ops;
{
struct wsplink *m;
int error;
DPRINTF(("wsmux_attach_sc: %s: type=%d dsc=%p, *psp=%p\n",
sc->sc_dv.dv_xname, type, dsc, *psp));
m = malloc(sizeof *m, M_DEVBUF, M_NOWAIT);
if (m == 0)
return (ENOMEM);
m->type = type;
m->mux = sc;
m->sc = dsc;
m->sc_mevents = ev;
m->sc_muxp = psp;
m->sc_ops = ops;
LIST_INSERT_HEAD(&sc->sc_reals, m, next);
if (sc->sc_displaydv) {
/* This is a display mux, so attach the new device to it. */
DPRINTF(("wsmux_attach_sc: %s: set display %p\n",
sc->sc_dv.dv_xname, sc->sc_displaydv));
error = 0;
if (m->sc_ops->dsetdisplay) {
error = m->sc_ops->dsetdisplay(m->sc, sc);
/* Ignore that the console already has a display. */
if (error == EBUSY)
error = 0;
if (!error) {
*m->sc_muxp = sc;
#ifdef WSDISPLAY_COMPAT_RAWKBD
DPRINTF(("wsmux_attach_sc: on %s set rawkbd=%d\n",
m->sc->dv_xname, sc->sc_rawkbd));
(void)m->sc_ops->dioctl(m->sc,
WSKBDIO_SETMODE,
(caddr_t)&sc->sc_rawkbd,
0, 0);
#endif
}
}
} else if (sc->sc_events.io) {
/* Mux is open, so open the new subdevice */
DPRINTF(("wsmux_attach_sc: %s: calling open of %s\n",
sc->sc_dv.dv_xname, m->sc->dv_xname));
/* mux already open, join in */
error = m->sc_ops->dopen(makedev(0, m->sc->dv_unit),
sc->sc_flags, sc->sc_mode, sc->sc_p);
if (!error)
*m->sc_muxp = sc;
} else {
DPRINTF(("wsmux_attach_sc: %s not open\n",
sc->sc_dv.dv_xname));
error = 0;
}
DPRINTF(("wsmux_attach_sc: done sc=%p psp=%p *psp=%p\n",
sc, psp, *psp));
return (error);
}
int
wsmux_detach_sc(sc, dsc)
struct wsmux_softc *sc;
struct device *dsc;
{
struct wsplink *m;
int error = 0;
DPRINTF(("wsmux_detach_sc: %s: dsc=%p\n", sc->sc_dv.dv_xname, dsc));
#ifdef DIAGNOSTIC
if (sc == 0) {
printf("wsmux_detach_sc: not allocated\n");
return (ENXIO);
}
#endif
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
if (m->sc == dsc)
break;
}
#ifdef DIAGNOSTIC
if (!m) {
printf("wsmux_detach_sc: not found\n");
return (ENXIO);
}
#endif
if (sc->sc_displaydv) {
if (m->sc_ops->dsetdisplay)
error = m->sc_ops->dsetdisplay(m->sc, 0);
if (error)
return (error);
*m->sc_muxp = 0;
} else if (*m->sc_muxp) {
DPRINTF(("wsmux_detach_sc: close\n"));
/* mux device is open, so close multiplexee */
m->sc_ops->dclose(m->sc, FREAD, 0, 0);
*m->sc_muxp = 0;
}
LIST_REMOVE(m, next);
free(m, M_DEVBUF);
DPRINTF(("wsmux_detach_sc: done sc=%p\n", sc));
return (0);
}
int wsmuxdoclose(dv, flags, mode, p)
struct device *dv;
int flags, mode;
struct proc *p;
{
struct wsmux_softc *sc = (struct wsmux_softc *)dv;
struct wsplink *m;
DPRINTF(("wsmuxclose: %s: sc=%p\n", sc->sc_dv.dv_xname, sc));
if (!(flags & FREAD)) {
/* Nothing to do, because open didn't do anything. */
return (0);
}
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
if (*m->sc_muxp == sc) {
DPRINTF(("wsmuxclose %s: m=%p dev=%s\n",
sc->sc_dv.dv_xname, m, m->sc->dv_xname));
m->sc_ops->dclose(m->sc, flags, mode, p);
*m->sc_muxp = 0;
}
}
wsevent_fini(&sc->sc_events);
sc->sc_events.io = NULL;
return (0);
}
int
wsmuxdoioctl(dv, cmd, data, flag, p)
struct device *dv;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct wsmux_softc *sc = (struct wsmux_softc *)dv;
struct wsplink *m;
int error, ok;
int s, put, get, n;
struct wseventvar *evar;
struct wscons_event *ev;
struct timeval xxxtime;
struct wsmux_device_list *l;
DPRINTF(("wsmuxdoioctl: %s: sc=%p, cmd=%08lx\n",
sc->sc_dv.dv_xname, sc, cmd));
switch (cmd) {
case WSMUX_INJECTEVENT:
/* Inject an event, e.g., from moused. */
if (!sc->sc_events.io)
return (EACCES);
evar = &sc->sc_events;
s = spltty();
get = evar->get;
put = evar->put;
if (++put % WSEVENT_QSIZE == get) {
put--;
splx(s);
return (ENOSPC);
}
if (put >= WSEVENT_QSIZE)
put = 0;
ev = &evar->q[put];
*ev = *(struct wscons_event *)data;
microtime(&xxxtime);
TIMEVAL_TO_TIMESPEC(&xxxtime, &ev->time);
evar->put = put;
WSEVENT_WAKEUP(evar);
splx(s);
return (0);
case WSMUX_ADD_DEVICE:
#define d ((struct wsmux_device *)data)
switch (d->type) {
#if NWSMOUSE > 0
case WSMUX_MOUSE:
return (wsmouse_add_mux(d->idx, sc));
#endif
#if NWSKBD > 0
case WSMUX_KBD:
return (wskbd_add_mux(d->idx, sc));
#endif
#if NWSMUX > 0
case WSMUX_MUX:
return (wsmux_add_mux(d->idx, sc));
#endif
default:
return (EINVAL);
}
case WSMUX_REMOVE_DEVICE:
switch (d->type) {
#if NWSMOUSE > 0
case WSMUX_MOUSE:
return (wsmouse_rem_mux(d->idx, sc));
#endif
#if NWSKBD > 0
case WSMUX_KBD:
return (wskbd_rem_mux(d->idx, sc));
#endif
#if NWSMUX > 0
case WSMUX_MUX:
return (wsmux_rem_mux(d->idx, sc));
#endif
default:
return (EINVAL);
}
#undef d
case WSMUX_LIST_DEVICES:
l = (struct wsmux_device_list *)data;
for (n = 0, m = LIST_FIRST(&sc->sc_reals);
n < WSMUX_MAXDEV && m != NULL;
m = LIST_NEXT(m, next)) {
l->devices[n].type = m->type;
l->devices[n].idx = m->sc->dv_unit;
n++;
}
l->ndevices = n;
return (0);
#ifdef WSDISPLAY_COMPAT_RAWKBD
case WSKBDIO_SETMODE:
sc->sc_rawkbd = *(int *)data;
DPRINTF(("wsmuxdoioctl: save rawkbd = %d\n", sc->sc_rawkbd));
break;
#endif
case FIOASYNC:
sc->sc_events.async = *(int *)data != 0;
return (0);
case TIOCSPGRP:
if (*(int *)data != sc->sc_events.io->p_pgid)
return (EPERM);
return (0);
default:
break;
}
if (sc->sc_events.io == NULL && sc->sc_displaydv == NULL)
return (EACCES);
/* Return 0 if any of the ioctl() succeeds, otherwise the last error */
error = 0;
ok = 0;
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
DPRINTF(("wsmuxdoioctl: m=%p *m->sc_muxp=%p sc=%p\n",
m, *m->sc_muxp, sc));
if (*m->sc_muxp == sc) {
DPRINTF(("wsmuxdoioctl: %s: m=%p dev=%s\n",
sc->sc_dv.dv_xname, m, m->sc->dv_xname));
error = m->sc_ops->dioctl(m->sc, cmd, data, flag, p);
if (!error)
ok = 1;
}
}
if (ok)
error = 0;
return (error);
}
int
wsmux_displayioctl(dv, cmd, data, flag, p)
struct device *dv;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct wsmux_softc *sc = (struct wsmux_softc *)dv;
struct wsplink *m;
int error, ok;
DPRINTF(("wsmux_displayioctl: %s: sc=%p, cmd=%08lx\n",
sc->sc_dv.dv_xname, sc, cmd));
#ifdef WSDISPLAY_COMPAT_RAWKBD
if (cmd == WSKBDIO_SETMODE) {
sc->sc_rawkbd = *(int *)data;
DPRINTF(("wsmux_displayioctl: rawkbd = %d\n", sc->sc_rawkbd));
}
#endif
/*
* Return 0 if any of the ioctl() succeeds, otherwise the last error.
* Return -1 if no mux component accepts the ioctl.
*/
error = -1;
ok = 0;
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
DPRINTF(("wsmux_displayioctl: m=%p sc=%p sc_muxp=%p\n",
m, sc, *m->sc_muxp));
if (m->sc_ops->ddispioctl && *m->sc_muxp == sc) {
error = m->sc_ops->ddispioctl(m->sc, cmd, data,
flag, p);
DPRINTF(("wsmux_displayioctl: m=%p dev=%s ==> %d\n",
m, m->sc->dv_xname, error));
if (!error)
ok = 1;
}
}
if (ok)
error = 0;
return (error);
}
int
wsmux_set_display(dv, muxsc)
struct device *dv;
struct wsmux_softc *muxsc;
{
struct wsmux_softc *sc = (struct wsmux_softc *)dv;
struct wsmux_softc *nsc = muxsc ? sc : 0;
struct device *displaydv = muxsc ? muxsc->sc_displaydv : 0;
struct device *odisplaydv;
struct wsplink *m;
int error, ok;
DPRINTF(("wsmux_set_display: %s: displaydv=%p\n",
sc->sc_dv.dv_xname, displaydv));
if (displaydv) {
if (sc->sc_displaydv)
return (EBUSY);
} else {
if (sc->sc_displaydv == NULL)
return (ENXIO);
}
odisplaydv = sc->sc_displaydv;
sc->sc_displaydv = displaydv;
if (displaydv)
printf("%s: connecting to %s\n",
sc->sc_dv.dv_xname, displaydv->dv_xname);
ok = 0;
error = 0;
for (m = LIST_FIRST(&sc->sc_reals); m; m = LIST_NEXT(m, next)) {
if (m->sc_ops->dsetdisplay &&
(nsc ? m->sc_mevents->io == 0 && *m->sc_muxp == 0 :
*m->sc_muxp == sc)) {
error = m->sc_ops->dsetdisplay(m->sc, nsc);
DPRINTF(("wsmux_set_display: m=%p dev=%s error=%d\n",
m, m->sc->dv_xname, error));
if (!error) {
ok = 1;
*m->sc_muxp = nsc;
#ifdef WSDISPLAY_COMPAT_RAWKBD
DPRINTF(("wsmux_set_display: on %s set rawkbd=%d\n",
m->sc->dv_xname, sc->sc_rawkbd));
(void)m->sc_ops->dioctl(m->sc,
WSKBDIO_SETMODE,
(caddr_t)&sc->sc_rawkbd,
0, 0);
#endif
}
}
}
if (ok)
error = 0;
if (displaydv == NULL)
printf("%s: disconnecting from %s\n",
sc->sc_dv.dv_xname, odisplaydv->dv_xname);
return (error);
}
#endif /* NWSMUX > 0 || (NWSDISPLAY > 0 && NWSKBD > 0) */
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