87f6c6625d
most devsw referenced functions are now static, as they are in the same file as their devsw structure. I've also added DEVFS support for nearly every device in the system, however many of the devices have 'incorrect' names under DEVFS because I couldn't quickly work out the correct naming conventions. (but devfs won't be coming on line for a month or so anyhow so that doesn't matter) If you "OWN" a device which would normally have an entry in /dev then search for the devfs_add_devsw() entries and munge to make them right.. check out similar devices to see what I might have done in them in you can't see what's going on.. for a laugh compare conf.c conf.h defore and after... :) I have not doen DEVFS entries for any DISKSLICE devices yet as that will be a much more complicated job.. (pass 5 :) pass 4 will be to make the devsw tables of type (cdevsw * ) rather than (cdevsw) seems to work here.. complaints to the usual places.. :)
255 lines
6.3 KiB
C
255 lines
6.3 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 withough 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 "joy.h"
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#if NJOY > 0
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#include <errno.h>
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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/kernel.h>
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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#include <machine/joystick.h>
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#include <i386/isa/isa.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/timerreg.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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/* the formulae below only work if u is ``not too large''. See also
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* the discussion in microtime.s */
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#define usec2ticks(u) (((u) * 19549)>>14)
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#define ticks2usec(u) (((u) * 3433)>>12)
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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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static struct {
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int port;
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int x_off[2], y_off[2];
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int timeout[2];
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#ifdef DEVFS
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void *devfs_token;
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#endif
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} joy[NJOY];
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extern int timer0_max_count;
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int joyprobe (struct isa_device *), joyattach (struct isa_device *);
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struct isa_driver joydriver = {joyprobe, joyattach, "joy"};
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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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struct cdevsw joy_cdevsw =
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{ joyopen, joyclose, joyread, nowrite, /*51*/
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joyioctl, nostop, nullreset, nodevtotty,/*joystick */
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seltrue, nommap, NULL, "joy", NULL, -1 };
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static int get_tick ();
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int
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joyprobe (struct isa_device *dev)
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{
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#ifdef WANT_JOYSTICK_CONNECTED
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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 1;
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#endif
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}
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int
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joyattach (struct isa_device *dev)
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{
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int unit = dev->id_unit;
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char name[32];
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joy[unit].port = dev->id_iobase;
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joy[unit].timeout[0] = joy[unit].timeout[1] = 0;
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printf("joy%d: joystick\n", unit);
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#ifdef DEVFS
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sprintf(name, "joy%d", unit);
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joy[dev->id_unit].devfs_token = devfs_add_devsw( "/", "joy",
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&joy_cdevsw, 0,
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DV_CHR, 0, 0, 0600);
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#endif
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return 1;
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}
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static int
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joyopen (dev_t dev, int flags, int fmt, struct proc *p)
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{
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int unit = UNIT (dev);
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int i = joypart (dev);
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if (joy[unit].timeout[i])
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return EBUSY;
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joy[unit].x_off[i] = joy[unit].y_off[i] = 0;
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joy[unit].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 proc *p)
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{
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int unit = UNIT (dev);
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int i = joypart (dev);
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joy[unit].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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int unit = UNIT(dev);
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int port = joy[unit].port;
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int i, t0, t1;
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int state = 0, x = 0, y = 0;
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struct joystick c;
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disable_intr ();
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outb (port, 0xff);
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t0 = get_tick ();
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t1 = t0;
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i = usec2ticks(joy[unit].timeout[joypart(dev)]);
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while (t0-t1 < i) {
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state = inb (port);
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if (joypart(dev) == 1)
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state >>= 2;
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t1 = get_tick ();
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if (t1 > t0)
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t1 -= timer0_max_count;
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if (!x && !(state & 0x01))
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x = t1;
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if (!y && !(state & 0x02))
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y = t1;
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if (x && y)
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break;
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}
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enable_intr ();
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c.x = x ? joy[unit].x_off[joypart(dev)] + ticks2usec(t0-x) : 0x80000000;
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c.y = y ? joy[unit].y_off[joypart(dev)] + ticks2usec(t0-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, int cmd, caddr_t data, int flag, struct proc *p)
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{
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int unit = 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[unit].timeout[i] = x;
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break;
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case JOY_GETTIMEOUT:
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*(int *) data = joy[unit].timeout[i];
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break;
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case JOY_SET_X_OFFSET:
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joy[unit].x_off[i] = *(int *) data;
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break;
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case JOY_SET_Y_OFFSET:
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joy[unit].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[unit].x_off[i];
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break;
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case JOY_GET_Y_OFFSET:
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*(int *) data = joy[unit].y_off[i];
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break;
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default:
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return ENXIO;
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}
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return 0;
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}
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static int
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get_tick ()
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{
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int low, high;
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outb (TIMER_MODE, TIMER_SEL0);
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low = inb (TIMER_CNTR0);
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high = inb (TIMER_CNTR0);
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return (high << 8) | low;
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}
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static joy_devsw_installed = 0;
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static void joy_drvinit(void *unused)
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{
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dev_t dev;
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if( ! joy_devsw_installed ) {
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dev = makedev(CDEV_MAJOR,0);
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cdevsw_add(&dev,&joy_cdevsw,NULL);
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joy_devsw_installed = 1;
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}
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}
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SYSINIT(joydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,joy_drvinit,NULL)
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#endif /* NJOY > 0 */
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