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/* $OpenBSD: joy.c,v 1.17 2023/01/30 10:49:05 jsg Exp $ */
/* $NetBSD: joy.c,v 1.3 1996/05/05 19:46:15 christos Exp $ */
/*-
* Copyright (c) 1995 Jean-Marc Zucconi
* All rights reserved.
*
* Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr>
*
* 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
* in this position and unchanged.
* 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. 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <machine/pio.h>
#include <machine/cpufunc.h>
#include <machine/joystick.h>
#include <machine/conf.h>
#include <dev/isa/isareg.h>
#include <dev/ic/i8253reg.h>
#include <i386/isa/joyreg.h>
static int joy_get_tick(void);
struct cfdriver joy_cd = {
NULL, "joy", DV_DULL
};
int
joyopen(dev_t dev, int flag, int mode, struct proc *p)
{
int unit = JOYUNIT(dev);
int i = JOYPART(dev);
struct joy_softc *sc;
if (unit >= joy_cd.cd_ndevs)
return (ENXIO);
sc = joy_cd.cd_devs[unit];
if (sc == NULL)
return (ENXIO);
if (sc->timeout[i])
return EBUSY;
sc->x_off[i] = sc->y_off[i] = 0;
sc->timeout[i] = JOY_TIMEOUT;
return 0;
}
int
joyclose(dev_t dev, int flag, int mode, struct proc *p)
{
int unit = JOYUNIT(dev);
int i = JOYPART(dev);
struct joy_softc *sc = joy_cd.cd_devs[unit];
sc->timeout[i] = 0;
return 0;
}
int
joyread(dev_t dev, struct uio *uio, int flag)
{
int unit = JOYUNIT(dev);
struct joy_softc *sc = joy_cd.cd_devs[unit];
struct joystick c;
int port = sc->port;
int i, t0, t1;
int state = 0, x = 0, y = 0;
u_long s;
s = intr_disable();
outb(port, 0xff);
t0 = joy_get_tick();
t1 = t0;
i = USEC2TICKS(sc->timeout[JOYPART(dev)]);
while (t0 - t1 < i) {
state = inb(port);
if (JOYPART(dev) == 1)
state >>= 2;
t1 = joy_get_tick();
if (t1 > t0)
t1 -= TIMER_FREQ / hz;
if (!x && !(state & 0x01))
x = t1;
if (!y && !(state & 0x02))
y = t1;
if (x && y)
break;
}
intr_restore(s);
c.x = x ? sc->x_off[JOYPART(dev)] + TICKS2USEC(t0 - x) : 0x80000000;
c.y = y ? sc->y_off[JOYPART(dev)] + TICKS2USEC(t0 - y) : 0x80000000;
state >>= 4;
c.b1 = ~state & 1;
c.b2 = ~(state >> 1) & 1;
return uiomove((caddr_t) & c, sizeof(struct joystick), uio);
}
int
joyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
{
int unit = JOYUNIT(dev);
struct joy_softc *sc = joy_cd.cd_devs[unit];
int i = JOYPART(dev);
int x;
switch (cmd) {
case JOY_SETTIMEOUT:
x = *(int *) data;
if (x < 1 || x > 10000) /* 10ms maximum! */
return EINVAL;
sc->timeout[i] = x;
break;
case JOY_GETTIMEOUT:
*(int *) data = sc->timeout[i];
break;
case JOY_SET_X_OFFSET:
sc->x_off[i] = *(int *) data;
break;
case JOY_SET_Y_OFFSET:
sc->y_off[i] = *(int *) data;
break;
case JOY_GET_X_OFFSET:
*(int *) data = sc->x_off[i];
break;
case JOY_GET_Y_OFFSET:
*(int *) data = sc->y_off[i];
break;
default:
return ENXIO;
}
return 0;
}
static int
joy_get_tick(void)
{
int low, high;
outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0);
low = inb(IO_TIMER1 + TIMER_CNTR0);
high = inb(IO_TIMER1 + TIMER_CNTR0);
return (high << 8) | low;
}
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