add the freebsd joystick driver; converted by matthieu@abel.laas.fr;

netbsd pr#1916

1 files changed, 248 insertions, 0 deletions

diff --git a/sys/arch/i386/isa/joy.c b/sys/arch/i386/isa/joy.c
new file mode 100644
index 00000000000..e2e73dc238d
--- /dev/null
+++ b/sys/arch/i386/isa/joy.c
@@ -0,0 +1,248 @@
+/*-
+ * 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;
+
+{
+#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
+}
+
+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;
+}