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7ac40f5f59
branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
243 lines
6.1 KiB
C
243 lines
6.1 KiB
C
/*-
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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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* $FreeBSD$
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*/
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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) (minor(d)&1)
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#define UNIT(d) ((minor(d)>>1)&3)
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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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#define JOY_SOFTC(unit) (struct joy_softc *) \
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devclass_get_softc(joy_devclass,(unit))
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#define CDEV_MAJOR 51
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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_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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.d_maj = CDEV_MAJOR,
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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(dev, SYS_RES_IOPORT, &joy->rid, 0, ~0, 1,
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RF_ACTIVE);
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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, 0, 0, 0, 0600, "joy%d", unit);
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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(dev_t 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 = JOY_SOFTC(UNIT(dev));
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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(dev_t 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 = JOY_SOFTC(UNIT(dev));
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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(dev_t dev, struct uio *uio, int flag)
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{
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struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
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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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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(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
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{
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struct joy_softc *joy = JOY_SOFTC(UNIT(dev));
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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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