Changed address of the game controller to 0x201 (was 0x200)

joy.c: joystick driver

1 files changed, 209 insertions, 0 deletions

diff --git a/sys/dev/joy/joy.c b/sys/dev/joy/joy.c
new file mode 100644
index 0000000..df3f780
--- /dev/null
+++ b/sys/dev/joy/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 */