252 lines
6.4 KiB
C
252 lines
6.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1995 Jean-Marc Zucconi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <sys/time.h>
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#include <sys/joystick.h>
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#include <dev/joy/joyvar.h>
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/* The game port can manage 4 buttons and 4 variable resistors (usually 2
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* joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201.
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* Getting the state of the buttons is done by reading the game port:
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* buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2)
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* to bits 0-3.
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* if button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5, 6, 7) is set to 0
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* to get the value of a resistor, write the value 0xff at port and
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* wait until the corresponding bit returns to 0.
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*/
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#define joypart(d) (dev2unit(d)&1)
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#ifndef JOY_TIMEOUT
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#define JOY_TIMEOUT 2000 /* 2 milliseconds */
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#endif
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static d_open_t joyopen;
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static d_close_t joyclose;
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static d_read_t joyread;
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static d_ioctl_t joyioctl;
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static struct cdevsw joy_cdevsw = {
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.d_version = D_VERSION,
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.d_flags = D_NEEDGIANT,
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.d_open = joyopen,
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.d_close = joyclose,
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.d_read = joyread,
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.d_ioctl = joyioctl,
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.d_name = "joy",
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};
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devclass_t joy_devclass;
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int
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joy_probe(device_t dev)
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{
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#ifdef WANT_JOYSTICK_CONNECTED
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#ifdef notyet
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outb(dev->id_iobase, 0xff);
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DELAY(10000); /* 10 ms delay */
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return (inb(dev->id_iobase) & 0x0f) != 0x0f;
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#else
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return (0);
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#endif
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#else
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return (0);
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#endif
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}
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int
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joy_attach(device_t dev)
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{
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int unit = device_get_unit(dev);
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struct joy_softc *joy = device_get_softc(dev);
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joy->rid = 0;
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joy->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &joy->rid,
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RF_ACTIVE|RF_SHAREABLE);
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if (joy->res == NULL)
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return ENXIO;
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joy->bt = rman_get_bustag(joy->res);
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joy->port = rman_get_bushandle(joy->res);
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joy->timeout[0] = joy->timeout[1] = 0;
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joy->d = make_dev(&joy_cdevsw, unit, 0, 0, 0600, "joy%d", unit);
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joy->d->si_drv1 = joy;
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gone_in_dev(dev, 12, "joy(4) driver");
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return (0);
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}
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int
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joy_detach(device_t dev)
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{
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struct joy_softc *joy = device_get_softc(dev);
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if (joy->res != NULL)
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bus_release_resource(dev, SYS_RES_IOPORT, joy->rid, joy->res);
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if (joy->d)
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destroy_dev(joy->d);
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return (0);
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}
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static int
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joyopen(struct cdev *dev, int flags, int fmt, struct thread *td)
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{
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int i = joypart (dev);
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struct joy_softc *joy = dev->si_drv1;
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if (joy->timeout[i])
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return (EBUSY);
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joy->x_off[i] = joy->y_off[i] = 0;
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joy->timeout[i] = JOY_TIMEOUT;
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return (0);
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}
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static int
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joyclose(struct cdev *dev, int flags, int fmt, struct thread *td)
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{
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int i = joypart (dev);
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struct joy_softc *joy = dev->si_drv1;
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joy->timeout[i] = 0;
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return (0);
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}
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static int
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joyread(struct cdev *dev, struct uio *uio, int flag)
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{
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struct joy_softc *joy = dev->si_drv1;
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bus_space_handle_t port = joy->port;
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bus_space_tag_t bt = joy->bt;
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struct timespec t, start, end;
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int state = 0;
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struct timespec x, y;
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struct joystick c;
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#ifndef __i386__
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int s;
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s = splhigh();
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#else
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disable_intr ();
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#endif
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nanotime(&t);
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end.tv_sec = 0;
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end.tv_nsec = joy->timeout[joypart(dev)] * 1000;
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timespecadd(&end, &t);
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for (; timespeccmp(&t, &end, <) && (bus_space_read_1(bt, port, 0) & 0x0f); nanotime(&t))
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; /* nothing */
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bus_space_write_1 (bt, port, 0, 0xff);
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nanotime(&start);
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end.tv_sec = 0;
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end.tv_nsec = joy->timeout[joypart(dev)] * 1000;
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timespecadd(&end, &start);
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t = start;
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timespecclear(&x);
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timespecclear(&y);
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while (timespeccmp(&t, &end, <)) {
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state = bus_space_read_1 (bt, port, 0);
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if (joypart(dev) == 1)
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state >>= 2;
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nanotime(&t);
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if (!timespecisset(&x) && !(state & 0x01))
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x = t;
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if (!timespecisset(&y) && !(state & 0x02))
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y = t;
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if (timespecisset(&x) && timespecisset(&y))
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break;
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}
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#ifndef __i386__
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splx(s);
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#else
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enable_intr ();
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#endif
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if (timespecisset(&x)) {
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timespecsub(&x, &start);
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c.x = joy->x_off[joypart(dev)] + x.tv_nsec / 1000;
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} else
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c.x = 0x80000000;
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if (timespecisset(&y)) {
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timespecsub(&y, &start);
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c.y = joy->y_off[joypart(dev)] + y.tv_nsec / 1000;
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} else
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c.y = 0x80000000;
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state >>= 4;
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c.b1 = ~state & 1;
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c.b2 = ~(state >> 1) & 1;
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return (uiomove((caddr_t)&c, sizeof(struct joystick), uio));
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}
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static int
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joyioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
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{
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struct joy_softc *joy = dev->si_drv1;
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int i = joypart (dev);
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int x;
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switch (cmd) {
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case JOY_SETTIMEOUT:
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x = *(int *) data;
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if (x < 1 || x > 10000) /* 10ms maximum! */
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return EINVAL;
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joy->timeout[i] = x;
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break;
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case JOY_GETTIMEOUT:
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*(int *) data = joy->timeout[i];
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break;
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case JOY_SET_X_OFFSET:
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joy->x_off[i] = *(int *) data;
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break;
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case JOY_SET_Y_OFFSET:
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joy->y_off[i] = *(int *) data;
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break;
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case JOY_GET_X_OFFSET:
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*(int *) data = joy->x_off[i];
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break;
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case JOY_GET_Y_OFFSET:
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*(int *) data = joy->y_off[i];
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break;
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default:
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return (ENOTTY);
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}
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return (0);
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}
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