NetBSD/sys/arch/alpha/wscons/ms.c

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/* $NetBSD: ms.c,v 1.7 1997/09/02 13:20:57 thorpej 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/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: ms.c,v 1.7 1997/09/02 13:20:57 thorpej Exp $");
#include <sys/param.h>
#include <sys/ioctl.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 <machine/conf.h>
#include <machine/vuid_event.h>
#include <alpha/wscons/event_var.h>
#include <alpha/wscons/wsconsvar.h>
cdev_decl(ms);
struct ms_softc {
struct device *ms_dev;
struct wscons_mdev_spec ms_spec;
char ms_mb; /* mouse button state */
char ms_ub; /* user button state */
int ms_dx; /* delta-x */
int ms_dy; /* delta-y */
volatile int ms_ready; /* event queue is ready */
struct evvar ms_events; /* event queue state */
} ms_softc;
void
msattach(mdev, mspec)
struct device *mdev;
struct wscons_mdev_spec *mspec;
{
register struct ms_softc *m = &ms_softc;
m->ms_dev = mdev;
m->ms_spec = *mspec;
}
void
ms_event(buttons, dx, dy)
char buttons; /* 0 is up */
int dx, dy;
{
register struct firm_event *fe;
register struct ms_softc *ms = &ms_softc;
register int mb, ub, d, get, put, any;
static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 };
static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT };
/*
* Discard input if not ready.
*/
if (ms->ms_ready == 0)
return;
ms->ms_mb = (buttons) & 0x7;
ms->ms_dx += dx;
ms->ms_dy += dy;
/*
* 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 = ms->ms_events.ev_get;
put = ms->ms_events.ev_put;
fe = &ms->ms_events.ev_q[put];
/* NEXT prepares to put the next event, backing off if necessary */
#define NEXT \
if ((++put) % EV_QSIZE == get) { \
put--; \
goto out; \
}
/* ADVANCE completes the `put' of the event */
#define ADVANCE \
fe++; \
if (put >= EV_QSIZE) { \
put = 0; \
fe = &ms->ms_events.ev_q[0]; \
} \
any = 1
mb = ms->ms_mb;
ub = ms->ms_ub;
while ((d = mb ^ ub) != 0) {
/*
* Mouse button change. Convert up to three changes
* to the `first' change, and drop it into the event queue.
*/
NEXT;
d = to_one[d - 1]; /* from 1..7 to {1,2,4} */
fe->id = to_id[d - 1]; /* from {1,2,4} to ID */
fe->value = mb & d ? VKEY_DOWN : VKEY_UP;
fe->time = time;
ADVANCE;
ub ^= d;
}
if (ms->ms_dx) {
NEXT;
fe->id = LOC_X_DELTA;
fe->value = ms->ms_dx;
fe->time = time;
ADVANCE;
ms->ms_dx = 0;
}
if (ms->ms_dy) {
NEXT;
fe->id = LOC_Y_DELTA;
fe->value = ms->ms_dy;
fe->time = time;
ADVANCE;
ms->ms_dy = 0;
}
out:
if (any) {
ms->ms_ub = ub;
ms->ms_events.ev_put = put;
EV_WAKEUP(&ms->ms_events);
}
}
int
msopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int error;
if (ms_softc.ms_dev == NULL) /* never attached! */
return (ENXIO);
if (ms_softc.ms_events.ev_io)
return (EBUSY);
ms_softc.ms_events.ev_io = p;
ev_init(&ms_softc.ms_events); /* may cause sleep */
ms_softc.ms_ready = 1; /* start accepting events */
error = (*ms_softc.ms_spec.wm_enable)(ms_softc.ms_dev);
if (error) {
ms_softc.ms_ready = 0; /* stop accepting events */
ev_fini(&ms_softc.ms_events);
ms_softc.ms_events.ev_io = NULL;
return (error);
}
return (0);
}
int
msclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
(*ms_softc.ms_spec.wm_disable)(ms_softc.ms_dev);
ms_softc.ms_ready = 0; /* stop accepting events */
ev_fini(&ms_softc.ms_events);
ms_softc.ms_events.ev_io = NULL;
return (0);
}
int
msread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (ev_read(&ms_softc.ms_events, uio, flags));
}
/* this routine should not exist, but is convenient to write here for now */
int
mswrite(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
return (EOPNOTSUPP);
}
int
msioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
register caddr_t data;
int flag;
struct proc *p;
{
switch (cmd) {
case FIONBIO: /* we will remove this someday (soon???) */
return (0);
case FIOASYNC:
ms_softc.ms_events.ev_async = *(int *)data != 0;
return (0);
case TIOCSPGRP:
if (*(int *)data != ms_softc.ms_events.ev_io->p_pgid)
return (EPERM);
return (0);
case VUIDGFORMAT:
/* we only do firm_events */
*(int *)data = VUID_FIRM_EVENT;
return (0);
case VUIDSFORMAT:
if (*(int *)data != VUID_FIRM_EVENT)
return (EINVAL);
return (0);
}
return (ENOTTY);
}
int
mspoll(dev, events, p)
dev_t dev;
int events;
struct proc *p;
{
return (ev_poll(&ms_softc.ms_events, events, p));
}