return (high << 8) | low;
}
-/*-
- * Copyright (c) 1995 Jean-Marc Zucconi
- * 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
- * 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 <errno.h>
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/device.h>
-
-#include <machine/cpu.h>
-#include <machine/pio.h>
-#include <machine/cpufunc.h>
-
-#include <machine/joystick.h>
-
-#include <dev/isa/isavar.h>
-#include <dev/isa/isareg.h>
-#include <i386/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
-
-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 *));
-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 cfdriver joycd = {
- NULL, "joy", joyprobe, joyattach, DV_DULL, sizeof(struct joy_softc)
-};
-
-
-int
-joyprobe(parent, match, aux)
- struct device *parent;
- void *match, *aux;
-
-{
- struct isa_attach_args *ia = aux;
-
- ia->ia_iosize = 1;
-#ifdef WANT_JOYSTICK_CONNECTED
- outb(ia->ia_iobase, 0xff);
- DELAY(10000); /* 10 ms delay */
- return (inb(ia->ia_iobase) & 0x0f) != 0x0f;
-#else
- 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 unit = sc->sc_dev.dv_unit;
-
- sc->port = ia->ia_iobase;
- sc->timeout[0] = sc->timeout[1] = 0;
- printf(": joystick\n", unit);
-}
-
-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 >= joycd.cd_ndevs) {
- return (ENXIO);
- }
- sc = joycd.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 = joycd.cd_devs[unit];
-
- sc->timeout[i] = 0;
- return 0;
-}
-
-int
-joyread(dev, uio, flag)
- dev_t dev;
- struct uio *uio;
- int flag;
-{
- int unit = JOYUNIT(dev);
- struct joy_softc *sc = joycd.cd_devs[unit];
- int port = sc->port;
- int i, t0, t1;
- int state = 0, x = 0, y = 0;
- struct joystick c;
-
- disable_intr();
- outb(port, 0xff);
- t0 = get_tick();
- t1 = t0;
- i = usec2ticks(sc->timeout[joypart(dev)]);
- while (t0 - t1 < i) {
- state = 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();
- 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, cmd, data, flag, p)
- dev_t dev;
- u_long cmd;
- caddr_t data;
- int flag;
- struct proc *p;
-{
- int unit = JOYUNIT(dev);
- int i = joypart(dev);
- struct joy_softc *sc = joycd.cd_devs[unit];
- 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;
-
- outb(TIMER_MODE, TIMER_SEL0);
- low = inb(TIMER_CNTR0);
- high = inb(TIMER_CNTR0);
-
- return (high << 8) | low;
-}
projects / openbsd / commitdiff