NetBSD/sys/dev/wscons/wsmouse.c

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/* $NetBSD: wsmouse.c,v 1.12 2000/05/01 07:36:58 takemura Exp $ */
/*
* Copyright (c) 1996, 1997 Christopher G. Demetriou. All rights reserved.
*
* 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 Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wsmouse.c,v 1.12 2000/05/01 07:36:58 takemura Exp $");
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)ms.c 8.1 (Berkeley) 6/11/93
*/
/*
* Mouse driver.
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <sys/tty.h>
#include <sys/signalvar.h>
#include <sys/device.h>
#include <sys/vnode.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsmousevar.h>
#include <dev/wscons/wseventvar.h>
#include "wsmouse.h"
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#include "wsmux.h"
#include "wsdisplay.h"
#include "wskbd.h"
#if NWSMUX > 0
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#include <dev/wscons/wsmuxvar.h>
#endif
#define INVALID_X INT_MAX
#define INVALID_Y INT_MAX
#define INVALID_Z INT_MAX
struct wsmouse_softc {
struct device sc_dv;
const struct wsmouse_accessops *sc_accessops;
void *sc_accesscookie;
int sc_ready; /* accepting events */
struct wseventvar sc_events; /* event queue state */
u_int sc_mb; /* mouse button state */
u_int sc_ub; /* user button state */
int sc_dx; /* delta-x */
int sc_dy; /* delta-y */
int sc_dz; /* delta-z */
int sc_x; /* absolute-x */
int sc_y; /* absolute-y */
int sc_z; /* absolute-z */
int sc_refcnt;
u_char sc_dying; /* device is being detached */
#if NWSMUX > 0
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struct wsmux_softc *sc_mux;
#endif
};
int wsmouse_match __P((struct device *, struct cfdata *, void *));
void wsmouse_attach __P((struct device *, struct device *, void *));
int wsmouse_detach __P((struct device *, int));
int wsmouse_activate __P((struct device *, enum devact));
int wsmouse_do_ioctl __P((struct wsmouse_softc *, u_long, caddr_t,
int, struct proc *));
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int wsmousedoclose __P((struct device *, int, int, struct proc *));
int wsmousedoioctl __P((struct device *, u_long, caddr_t, int,
struct proc *));
struct cfattach wsmouse_ca = {
sizeof (struct wsmouse_softc), wsmouse_match, wsmouse_attach,
wsmouse_detach, wsmouse_activate
};
#if NWSMOUSE > 0
extern struct cfdriver wsmouse_cd;
#endif /* NWSMOUSE > 0 */
cdev_decl(wsmouse);
#if NWSMUX > 0
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struct wsmuxops wsmouse_muxops = {
wsmouseopen, wsmousedoclose, wsmousedoioctl, 0, 0
};
#endif
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/*
* Print function (for parent devices).
*/
int
wsmousedevprint(aux, pnp)
void *aux;
const char *pnp;
{
if (pnp)
printf("wsmouse at %s", pnp);
return (UNCONF);
}
int
wsmouse_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
return (1);
}
void
wsmouse_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)self;
struct wsmousedev_attach_args *ap = aux;
#if NWSMUX > 0
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int mux;
#endif
sc->sc_accessops = ap->accessops;
sc->sc_accesscookie = ap->accesscookie;
sc->sc_ready = 0; /* sanity */
#if NWSMUX > 0
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mux = sc->sc_dv.dv_cfdata->wsmousedevcf_mux;
if (mux != WSMOUSEDEVCF_MUX_DEFAULT) {
wsmux_attach(mux, WSMUX_MOUSE, &sc->sc_dv, &sc->sc_events,
&sc->sc_mux, &wsmouse_muxops);
printf(" mux %d", mux);
}
#endif
printf("\n");
}
int
wsmouse_activate(self, act)
struct device *self;
enum devact act;
{
/* XXX should we do something more? */
return (0);
}
/*
* Detach a mouse. To keep track of users of the softc we keep
* a reference count that's incremented while inside, e.g., read.
* If the mouse is active and the reference count is > 0 (0 is the
* normal state) we post an event and then wait for the process
* that had the reference to wake us up again. Then we blow away the
* vnode and return (which will deallocate the softc).
*/
int
wsmouse_detach(self, flags)
struct device *self;
int flags;
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)self;
struct wseventvar *evar;
int maj, mn;
int s;
#if NWSMUX > 0
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int mux;
#endif
sc->sc_dying = 1;
#if NWSMUX > 0
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mux = sc->sc_dv.dv_cfdata->wsmousedevcf_mux;
if (mux != WSMOUSEDEVCF_MUX_DEFAULT)
wsmux_detach(mux, &sc->sc_dv);
#endif
evar = &sc->sc_events;
if (evar->io) {
s = spltty();
if (--sc->sc_refcnt >= 0) {
/* Wake everyone by generating a dummy event. */
if (++evar->put >= WSEVENT_QSIZE)
evar->put = 0;
WSEVENT_WAKEUP(evar);
/* Wait for processes to go away. */
if (tsleep(sc, PZERO, "wsmdet", hz * 60))
printf("wsmouse_detach: %s didn't detach\n",
sc->sc_dv.dv_xname);
}
splx(s);
}
/* locate the major number */
for (maj = 0; maj < nchrdev; maj++)
if (cdevsw[maj].d_open == wsmouseopen)
break;
/* Nuke the vnodes for any open instances (calls close). */
mn = self->dv_unit;
vdevgone(maj, mn, mn, VCHR);
return (0);
}
void
wsmouse_input(wsmousedev, btns, x, y, z, flags)
struct device *wsmousedev;
u_int btns; /* 0 is up */
int x, y, z;
u_int flags;
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)wsmousedev;
struct wscons_event *ev;
struct wseventvar *evar;
int mb, ub, d, get, put, any;
/*
* Discard input if not ready.
*/
if (sc->sc_ready == 0)
return;
#if NWSMUX > 0
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if (sc->sc_mux)
evar = &sc->sc_mux->sc_events;
else
#endif
evar = &sc->sc_events;
sc->sc_mb = btns;
if (!(flags & WSMOUSE_INPUT_ABSOLUTE_X))
sc->sc_dx += x;
if (!(flags & WSMOUSE_INPUT_ABSOLUTE_Y))
sc->sc_dy += y;
if (!(flags & WSMOUSE_INPUT_ABSOLUTE_Z))
sc->sc_dz += z;
/*
* We have at least one event (mouse button, delta-X, or
* delta-Y; possibly all three, and possibly three separate
* button events). Deliver these events until we are out
* of changes or out of room. As events get delivered,
* mark them `unchanged'.
*/
any = 0;
get = evar->get;
put = evar->put;
ev = &evar->q[put];
/* NEXT prepares to put the next event, backing off if necessary */
#define NEXT \
if ((++put) % WSEVENT_QSIZE == get) { \
put--; \
goto out; \
}
/* ADVANCE completes the `put' of the event */
#define ADVANCE \
ev++; \
if (put >= WSEVENT_QSIZE) { \
put = 0; \
ev = &evar->q[0]; \
} \
any = 1
/* TIMESTAMP sets `time' field of the event to the current time */
#define TIMESTAMP \
do { \
int s; \
s = splhigh(); \
TIMEVAL_TO_TIMESPEC(&time, &ev->time); \
splx(s); \
} while (0)
if (flags & WSMOUSE_INPUT_ABSOLUTE_X) {
if (sc->sc_x != x) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_ABSOLUTE_X;
ev->value = x;
TIMESTAMP;
ADVANCE;
sc->sc_x = x;
}
} else {
if (sc->sc_dx) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_DELTA_X;
ev->value = sc->sc_dx;
TIMESTAMP;
ADVANCE;
sc->sc_dx = 0;
}
}
if (flags & WSMOUSE_INPUT_ABSOLUTE_Y) {
if (sc->sc_y != y) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_ABSOLUTE_Y;
ev->value = y;
TIMESTAMP;
ADVANCE;
sc->sc_y = y;
}
} else {
if (sc->sc_dy) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_DELTA_Y;
ev->value = sc->sc_dy;
TIMESTAMP;
ADVANCE;
sc->sc_dy = 0;
}
}
if (flags & WSMOUSE_INPUT_ABSOLUTE_Z) {
if (sc->sc_z != z) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_ABSOLUTE_Z;
ev->value = z;
TIMESTAMP;
ADVANCE;
sc->sc_z = z;
}
} else {
if (sc->sc_dz) {
NEXT;
ev->type = WSCONS_EVENT_MOUSE_DELTA_Z;
ev->value = sc->sc_dz;
TIMESTAMP;
ADVANCE;
sc->sc_dz = 0;
}
}
mb = sc->sc_mb;
ub = sc->sc_ub;
while ((d = mb ^ ub) != 0) {
/*
* Mouse button change. Find the first change and drop
* it into the event queue.
*/
NEXT;
ev->value = ffs(d) - 1;
KASSERT(ev->value >= 0);
d = 1 << ev->value;
ev->type =
(mb & d) ? WSCONS_EVENT_MOUSE_DOWN : WSCONS_EVENT_MOUSE_UP;
TIMESTAMP;
ADVANCE;
ub ^= d;
}
out:
if (any) {
sc->sc_ub = ub;
evar->put = put;
WSEVENT_WAKEUP(evar);
}
}
int
wsmouseopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
#if NWSMOUSE > 0
struct wsmouse_softc *sc;
int error, unit;
unit = minor(dev);
if (unit >= wsmouse_cd.cd_ndevs || /* make sure it was attached */
(sc = wsmouse_cd.cd_devs[unit]) == NULL)
return (ENXIO);
if (sc->sc_dying)
return (EIO);
if ((flags & (FREAD | FWRITE)) == FWRITE)
return (0); /* always allow open for write
so ioctl() is possible. */
#if NWSMUX > 0
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if (sc->sc_mux)
return (EBUSY);
#endif
if (sc->sc_events.io) /* and that it's not in use */
return (EBUSY);
sc->sc_events.io = p;
wsevent_init(&sc->sc_events); /* may cause sleep */
sc->sc_ready = 1; /* start accepting events */
sc->sc_x = INVALID_X;
sc->sc_y = INVALID_Y;
sc->sc_z = INVALID_Z;
/* enable the device, and punt if that's not possible */
error = (*sc->sc_accessops->enable)(sc->sc_accesscookie);
if (error) {
sc->sc_ready = 0; /* stop accepting events */
wsevent_fini(&sc->sc_events);
sc->sc_events.io = NULL;
return (error);
}
return (0);
#else
return (ENXIO);
#endif /* NWSMOUSE > 0 */
}
int
wsmouseclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
#if NWSMOUSE > 0
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return (wsmousedoclose(wsmouse_cd.cd_devs[minor(dev)],
flags, mode, p));
#else
return (ENXIO);
#endif /* NWSMOUSE > 0 */
}
#if NWSMOUSE > 0
int
wsmousedoclose(dv, flags, mode, p)
struct device *dv;
int flags, mode;
struct proc *p;
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)dv;
if ((flags & (FREAD | FWRITE)) == FWRITE)
return (0); /* see wsmouseopen() */
(*sc->sc_accessops->disable)(sc->sc_accesscookie);
sc->sc_ready = 0; /* stop accepting events */
wsevent_fini(&sc->sc_events);
sc->sc_events.io = NULL;
return (0);
}
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#endif /* NWSMOUSE > 0 */
int
wsmouseread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
#if NWSMOUSE > 0
struct wsmouse_softc *sc = wsmouse_cd.cd_devs[minor(dev)];
int error;
if (sc->sc_dying)
return (EIO);
sc->sc_refcnt++;
error = wsevent_read(&sc->sc_events, uio, flags);
if (--sc->sc_refcnt < 0) {
wakeup(sc);
error = EIO;
}
return (error);
#else
return (ENXIO);
#endif /* NWSMOUSE > 0 */
}
int
wsmouseioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
#if NWSMOUSE > 0
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return (wsmousedoioctl(wsmouse_cd.cd_devs[minor(dev)],
cmd, data, flag, p));
#else
return (ENXIO);
#endif /* NWSMOUSE > 0 */
}
#if NWSMOUSE > 0
/* A wrapper around the ioctl() workhorse to make reference counting easy. */
int
wsmousedoioctl(dv, cmd, data, flag, p)
struct device *dv;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)dv;
int error;
sc->sc_refcnt++;
error = wsmouse_do_ioctl(sc, cmd, data, flag, p);
if (--sc->sc_refcnt < 0)
wakeup(sc);
return (error);
}
int
wsmouse_do_ioctl(sc, cmd, data, flag, p)
struct wsmouse_softc *sc;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
int error;
if (sc->sc_dying)
return (EIO);
/*
* Try the generic ioctls that the wsmouse interface supports.
*/
switch (cmd) {
case FIONBIO: /* we will remove this someday (soon???) */
return (0);
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);
}
/*
* Try the mouse driver for WSMOUSEIO ioctls. It returns -1
* if it didn't recognize the request.
*/
error = (*sc->sc_accessops->ioctl)(sc->sc_accesscookie, cmd,
data, flag, p);
return (error != -1 ? error : ENOTTY);
}
#endif /* NWSMOUSE > 0 */
int
wsmousepoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
#if NWSMOUSE > 0
struct wsmouse_softc *sc = wsmouse_cd.cd_devs[minor(dev)];
return (wsevent_poll(&sc->sc_events, events, p));
#else
return (0);
#endif /* NWSMOUSE > 0 */
}
#if NWSMUX > 0
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int
wsmouse_add_mux(unit, muxsc)
int unit;
struct wsmux_softc *muxsc;
{
struct wsmouse_softc *sc;
if (unit < 0 || unit >= wsmouse_cd.cd_ndevs ||
(sc = wsmouse_cd.cd_devs[unit]) == NULL)
return (ENXIO);
if (sc->sc_mux || sc->sc_events.io)
return (EBUSY);
return (wsmux_attach_sc(muxsc, WSMUX_KBD, &sc->sc_dv, &sc->sc_events,
&sc->sc_mux, &wsmouse_muxops));
}
int
wsmouse_rem_mux(unit, muxsc)
int unit;
struct wsmux_softc *muxsc;
{
struct wsmouse_softc *sc;
if (unit < 0 || unit >= wsmouse_cd.cd_ndevs ||
(sc = wsmouse_cd.cd_devs[unit]) == NULL)
return (ENXIO);
return (wsmux_detach_sc(muxsc, &sc->sc_dv));
}
#endif