NetBSD/sys/arch/amiga/dev/ms.c

412 lines
9.0 KiB
C

/* $NetBSD: ms.c,v 1.7 1995/04/10 09:10:21 mycroft Exp $ */
/*
* based on:
*
* 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
*
* Header: ms.c,v 1.5 92/11/26 01:28:47 torek Exp (LBL)
*/
/*
* Mouse driver.
*/
#include <sys/param.h>
#include <sys/conf.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 <amiga/dev/event_var.h>
#include <amiga/dev/vuid_event.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cia.h>
#include "mouse.h"
#if NMOUSE > 0
/* there's really no more physical ports on an amiga.. */
#if NMOUSE > 2
#undef NMOUSE
#define NMOUSE 2
#endif
void msintr __P((void *));
void ms_enable __P((dev_t));
void ms_disable __P((dev_t));
int
mouseattach(cnt)
int cnt;
{
printf("%d %s configured\n", NMOUSE, NMOUSE == 1 ? "mouse" : "mice");
return(NMOUSE);
}
/*
* Amiga mice are hooked up to one of the two "game" ports, where
* the main mouse is usually on the first port, and port 2 can
* be used by a joystick. Nevertheless, we support two mouse
* devices, /dev/mouse0 and /dev/mouse1 (with a link of /dev/mouse to
* the device that represents the port of the mouse in use).
*/
struct ms_softc {
u_char ms_horc; /* horizontal counter on last scan */
u_char ms_verc; /* vertical counter on last scan */
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[NMOUSE];
/*
* enable scanner, called when someone opens the device.
* Assume caller already validated range of dev.
*/
void
ms_enable(dev)
dev_t dev;
{
struct ms_softc *ms;
ms = &ms_softc[minor(dev)];
/*
* use this as flag to the "interrupt" to tell it when to
* shut off (when it's reset to 0).
*/
ms->ms_ready = 1;
timeout(msintr, (void *)minor(dev), 2);
}
/*
* disable scanner. Just set ms_ready to 0, and after the next
* timeout taken, no further timeouts will be initiated.
*/
void
ms_disable(dev)
dev_t dev;
{
struct ms_softc *ms;
int s;
ms = &ms_softc[minor(dev)];
s = splhigh ();
ms->ms_ready = 0;
/*
* sync with the interrupt
*/
tsleep(ms, PZERO - 1, "mouse-disable", 0);
splx(s);
}
/*
* we're emulating a mousesystems serial mouse here..
*/
void
msintr(arg)
void *arg;
{
static const char to_one[] = { 1, 2, 2, 4, 4, 4, 4 };
static const int to_id[] = { MS_RIGHT, MS_MIDDLE, 0, MS_LEFT };
struct ms_softc *ms;
struct firm_event *fe;
int mb, ub, d, get, put, any, unit;
u_char pra, *horc, *verc;
u_short pot, count;
short dx, dy;
unit = (int)arg;
ms = &ms_softc[unit];
horc = ((u_char *) &count) + 1;
verc = (u_char *) &count;
/*
* first read the three buttons.
*/
pot = custom.potgor;
pra = ciaa.pra;
pot >>= unit == 0 ? 8 : 12; /* contains right and middle button */
pra >>= unit == 0 ? 6 : 7; /* contains left button */
mb = (pot & 4) / 4 + (pot & 1) * 2 + (pra & 1) * 4;
mb ^= 0x07;
/*
* read current values of counter registers
*/
if (unit == 0)
count = custom.joy0dat;
else
count = custom.joy1dat;
/*
* take care of wraparound
*/
dx = *horc - ms->ms_horc;
if (dx < -127)
dx += 255;
else if (dx > 127)
dx -= 255;
dy = *verc - ms->ms_verc;
if (dy < -127)
dy += 255;
else if (dy > 127)
dy -= 255;
/*
* remember current values for next scan
*/
ms->ms_horc = *horc;
ms->ms_verc = *verc;
ms->ms_dx = dx;
ms->ms_dy = dy;
ms->ms_mb = mb;
if (dx || dy || ms->ms_ub != ms->ms_mb) {
/*
* 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];
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.
*/
if ((++put) % EV_QSIZE == get) {
put--;
goto out;
}
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;
fe++;
if (put >= EV_QSIZE) {
put = 0;
fe = &ms->ms_events.ev_q[0];
}
any = 1;
ub ^= d;
}
if (ms->ms_dx) {
if ((++put) % EV_QSIZE == get) {
put--;
goto out;
}
fe->id = LOC_X_DELTA;
fe->value = ms->ms_dx;
fe->time = time;
fe++;
if (put >= EV_QSIZE) {
put = 0;
fe = &ms->ms_events.ev_q[0];
}
any = 1;
ms->ms_dx = 0;
}
if (ms->ms_dy) {
if ((++put) % EV_QSIZE == get) {
put--;
goto out;
}
fe->id = LOC_Y_DELTA;
fe->value = ms->ms_dy;
fe->time = time;
fe++;
if (put >= EV_QSIZE) {
put = 0;
fe = &ms->ms_events.ev_q[0];
}
any = 1;
ms->ms_dy = 0;
}
out:
if (any) {
ms->ms_ub = ub;
ms->ms_events.ev_put = put;
EV_WAKEUP(&ms->ms_events);
}
}
/*
* reschedule handler, or if terminating,
* handshake with ms_disable
*/
if (ms->ms_ready)
timeout(msintr, (void *)unit, 2);
else
wakeup(ms);
}
int
msopen(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
struct ms_softc *ms;
int s, error, unit;
unit = minor(dev);
ms = &ms_softc[unit];
if (unit >= NMOUSE)
return(EXDEV);
if (ms->ms_events.ev_io)
return(EBUSY);
ms->ms_events.ev_io = p;
ev_init(&ms->ms_events); /* may cause sleep */
ms_enable(dev);
return(0);
}
int
msclose(dev, flags, mode, p)
dev_t dev;
int flags, mode;
struct proc *p;
{
int unit;
struct ms_softc *ms;
unit = minor (dev);
ms = &ms_softc[unit];
ms_disable(dev);
ev_fini(&ms->ms_events);
ms->ms_events.ev_io = NULL;
return(0);
}
int
msread(dev, uio, flags)
dev_t dev;
struct uio *uio;
int flags;
{
struct ms_softc *ms;
ms = &ms_softc[minor(dev)];
return(ev_read(&ms->ms_events, uio, flags));
}
int
msioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
register caddr_t data;
int flag;
struct proc *p;
{
struct ms_softc *ms;
int unit;
unit = minor(dev);
ms = &ms_softc[unit];
switch (cmd) {
case FIONBIO: /* we will remove this someday (soon???) */
return(0);
case FIOASYNC:
ms->ms_events.ev_async = *(int *)data != 0;
return(0);
case TIOCSPGRP:
if (*(int *)data != ms->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
msselect(dev, rw, p)
dev_t dev;
int rw;
struct proc *p;
{
struct ms_softc *ms;
ms = &ms_softc[minor(dev)];
return(ev_select(&ms->ms_events, rw, p));
}
#endif /* NMOUSE > 0 */