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author | jmz <jmz@FreeBSD.org> | 1995-01-25 20:11:51 +0000 |
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committer | jmz <jmz@FreeBSD.org> | 1995-01-25 20:11:51 +0000 |
commit | 84f1d5b40927a911fcb4bb984cb22f7dff06405e (patch) | |
tree | 3c5bfbe01fd6cf9cb57786fc8aa50f6fba9ae88e /sys/i386/isa/joy.c | |
parent | 72785518eb5f63d316d3ceae31c42e85e938a42c (diff) | |
download | FreeBSD-src-84f1d5b40927a911fcb4bb984cb22f7dff06405e.zip FreeBSD-src-84f1d5b40927a911fcb4bb984cb22f7dff06405e.tar.gz |
Changed address of the game controller to 0x201 (was 0x200)
joy.c: joystick driver
Diffstat (limited to 'sys/i386/isa/joy.c')
-rw-r--r-- | sys/i386/isa/joy.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/sys/i386/isa/joy.c b/sys/i386/isa/joy.c new file mode 100644 index 0000000..df3f780 --- /dev/null +++ b/sys/i386/isa/joy.c @@ -0,0 +1,209 @@ +/*- + * 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 "joy.h" + +#if NJOY > 0 + +#include <errno.h> +#include <sys/types.h> +#include <i386/isa/isa.h> +#include <i386/isa/timerreg.h> +#include <i386/isa/isa_device.h> +#include <machine/cpufunc.h> + +#include <i386/include/joystick.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. + */ + +/* #defines below taken from clock.c */ +#ifndef TIMER_FREQ +#define TIMER_FREQ 1193182 +#endif +#define usec2ticks(u) (u) * (TIMER_FREQ / 1000000) \ + + (u) * ((TIMER_FREQ % 1000000) / 1000) / 1000 \ + + (u) * (TIMER_FREQ % 1000) / 1000000 + + + +#define joypart(d) minor(d)&1 +#define UNIT(d) minor(d)>>1&3 +#ifndef JOY_TIMEOUT +#define JOY_TIMEOUT 2000 /* 2 milliseconds */ +#endif + +static struct { + int port; + int x_off[2], y_off[2]; + int timeout[2]; +} joy[NJOY]; + + +extern int hz; + +int joyprobe (struct isa_device *), joyattach (struct isa_device *); + +struct isa_driver joydriver = {joyprobe, joyattach, "joy"}; + +static int get_tick (); + + +int +joyprobe (struct isa_device *dev) +{ +#ifdef WANT_JOYSTICK_CONNECTED + outb (dev->id_iobase, 0xff); + DELAY (10000); /* 10 ms delay */ + return (inb (dev->id_iobase) & 0x0f) != 0x0f; +#else + return 1; +#endif +} + +int +joyattach (struct isa_device *dev) +{ + joy[dev->id_unit].port = dev->id_iobase; + joy[dev->id_unit].timeout[0] = joy[dev->id_unit].timeout[1] = 0; + printf("joy%d: joystick\n", dev->id_unit); + + return 1; +} + +int +joyopen (dev_t dev, int flag) +{ + int unit = UNIT (dev); + int i = joypart (dev); + + if (joy[unit].timeout[i]) + return EBUSY; + joy[unit].x_off[i] = joy[unit].y_off[i] = 0; + joy[unit].timeout[i] = JOY_TIMEOUT; + return 0; +} +int +joyclose (dev_t dev, int flag) +{ + int unit = UNIT (dev); + int i = joypart (dev); + + joy[unit].timeout[i] = 0; + return 0; +} + +int +joyread (dev_t dev, struct uio *uio, int flag) +{ + int unit = UNIT(dev); + int port = joy[unit].port; + int i, t0, t1; + int state = 0, x = 0, y = 0; + int c[4]; + + disable_intr (); + outb (port, 0xff); + t0 = get_tick (); + t1 = t0; + i = usec2ticks(joy[unit].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[0] = x ? joy[unit].x_off[joypart(dev)] + (t0-x) : 0x80000000; + c[1] = y ? joy[unit].y_off[joypart(dev)] + (t0-y) : 0x80000000; + state >>= 4; + c[2] = ~state & 1; + c[3] = ~(state >> 1) & 1; + return uiomove (c, 4*sizeof(int), uio); +} +int joyioctl (dev_t dev, int cmd, caddr_t data, int flag, struct proc *p) +{ + int unit = UNIT (dev); + int i = joypart (dev); + int x; + + switch (cmd) { + case JOY_SETTIMEOUT: + x = *(int *) data; + if (x < 1 || x > 10000) /* 10ms maximum! */ + return EINVAL; + joy[unit].timeout[i] = x; + break; + case JOY_GETTIMEOUT: + *(int *) data = joy[unit].timeout[i]; + break; + case JOY_SET_X_OFFSET: + joy[unit].x_off[i] = *(int *) data; + break; + case JOY_SET_Y_OFFSET: + joy[unit].y_off[i] = *(int *) data; + break; + case JOY_GET_X_OFFSET: + *(int *) data = joy[unit].x_off[i]; + break; + case JOY_GET_Y_OFFSET: + *(int *) data = joy[unit].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; +} + +#endif /* NJOY > 0 */ |