258 lines
6.4 KiB
C
258 lines
6.4 KiB
C
/* $NetBSD: joy.c,v 1.2 2000/02/22 11:26:03 soda 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 withough 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/cpu.h>
|
|
#include <machine/pio.h>
|
|
#include <machine/joystick.h>
|
|
|
|
#include <dev/isa/isavar.h>
|
|
#include <dev/isa/isareg.h>
|
|
#include <arc/isa/timerreg.h>
|
|
|
|
/*
|
|
* The game port can manage 4 buttons and 4 variable resistors (usually 2
|
|
* joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201.
|
|
* Getting the state of the buttons is done by reading the game port;
|
|
* buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2)
|
|
* to bits 0-3. If button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5,
|
|
* 6, 7) is set to 0 to get the value of a resistor, write the value 0xff
|
|
* at port and wait until the corresponding bit returns to 0.
|
|
*/
|
|
|
|
/*
|
|
* The formulae below only work if u is ``not too large''. See also
|
|
* the discussion in microtime.s
|
|
*/
|
|
#define USEC2TICKS(u) (((u) * 19549) >> 14)
|
|
#define TICKS2USEC(u) (((u) * 3433) >> 12)
|
|
|
|
|
|
#define JOYPART(d) (minor(d) & 1)
|
|
#define JOYUNIT(d) minor(d) >> 1 & 3
|
|
|
|
#ifndef JOY_TIMEOUT
|
|
#define JOY_TIMEOUT 2000 /* 2 milliseconds */
|
|
#endif
|
|
|
|
#define JOY_NPORTS 1
|
|
|
|
struct joy_softc {
|
|
struct device sc_dev;
|
|
int port;
|
|
int x_off[2], y_off[2];
|
|
int timeout[2];
|
|
};
|
|
|
|
int joyprobe __P((struct device *, void *, void *));
|
|
int joyread __P((dev_t dev, struct uio *uio, int flag));
|
|
int joyioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p));
|
|
void joyattach __P((struct device *, struct device *, void *));
|
|
int joyopen __P((dev_t, int, int, struct proc *));
|
|
int joyclose __P((dev_t, int, int, struct proc *));
|
|
static int get_tick __P((void));
|
|
|
|
struct cfattach joy_ca = {
|
|
sizeof(struct joy_softc), joyprobe, joyattach
|
|
};
|
|
|
|
struct cfdriver joy_cd = {
|
|
NULL, "joy", DV_DULL
|
|
};
|
|
|
|
|
|
int
|
|
joyprobe(parent, match, aux)
|
|
struct device *parent;
|
|
void *match, *aux;
|
|
{
|
|
struct isa_attach_args *ia = aux;
|
|
#ifdef WANT_JOYSTICK_CONNECTED
|
|
int iobase = ia->ia_iobase;
|
|
|
|
isa_outb(iobase, 0xff);
|
|
DELAY(10000); /* 10 ms delay */
|
|
return (isa_inb(iobase) & 0x0f) != 0x0f;
|
|
#else
|
|
ia->ia_iosize = JOY_NPORTS;
|
|
ia->ia_msize = 0;
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
joyattach(parent, self, aux)
|
|
struct device *parent, *self;
|
|
void *aux;
|
|
{
|
|
struct joy_softc *sc = (void *) self;
|
|
struct isa_attach_args *ia = aux;
|
|
int iobase = ia->ia_iobase;
|
|
|
|
sc->port = iobase;
|
|
sc->timeout[0] = sc->timeout[1] = 0;
|
|
isa_outb(iobase, 0xff);
|
|
DELAY(10000); /* 10 ms delay */
|
|
printf(": joystick%sconnected\n",
|
|
(isa_inb(iobase) & 0x0f) == 0x0f ? " not " : " ");
|
|
}
|
|
|
|
int
|
|
joyopen(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag, 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->timeout[i])
|
|
return EBUSY;
|
|
|
|
sc->x_off[i] = sc->y_off[i] = 0;
|
|
sc->timeout[i] = JOY_TIMEOUT;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
joyclose(dev, flag, mode, p)
|
|
dev_t dev;
|
|
int flag, 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;
|
|
|
|
/* disable_intr(); */ /* XXX BAD */
|
|
isa_outb(port, 0xff);
|
|
t0 = get_tick();
|
|
t1 = t0;
|
|
i = USEC2TICKS(sc->timeout[JOYPART(dev)]);
|
|
while (t0 - t1 < i) {
|
|
state = isa_inb(port);
|
|
if (JOYPART(dev) == 1)
|
|
state >>= 2;
|
|
t1 = 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;
|
|
}
|
|
/* enable_intr(); */ /* XXX BAD */
|
|
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
|
|
get_tick()
|
|
{
|
|
int low, high;
|
|
|
|
isa_outb(TIMER_MODE, TIMER_SEL0);
|
|
low = isa_inb(TIMER_CNTR0);
|
|
high = isa_inb(TIMER_CNTR0);
|
|
|
|
return (high << 8) | low;
|
|
}
|