Annotation of sys/arch/i386/isa/joy.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: joy.c,v 1.13 2007/08/01 13:18:18 martin Exp $ */
! 2: /* $NetBSD: joy.c,v 1.3 1996/05/05 19:46:15 christos Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1995 Jean-Marc Zucconi
! 6: * All rights reserved.
! 7: *
! 8: * Ported to NetBSD by Matthieu Herrb <matthieu@laas.fr>
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer
! 15: * in this position and unchanged.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: *
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <sys/kernel.h>
! 38: #include <sys/device.h>
! 39: #include <sys/errno.h>
! 40:
! 41: #include <machine/cpu.h>
! 42: #include <machine/pio.h>
! 43: #include <machine/cpufunc.h>
! 44: #include <machine/joystick.h>
! 45: #include <machine/conf.h>
! 46:
! 47: #include <dev/isa/isavar.h>
! 48: #include <dev/isa/isareg.h>
! 49: #include <dev/ic/i8253reg.h>
! 50: #include <i386/isa/joyreg.h>
! 51:
! 52: static int joy_get_tick(void);
! 53:
! 54: struct cfdriver joy_cd = {
! 55: NULL, "joy", DV_DULL
! 56: };
! 57:
! 58: int
! 59: joyopen(dev_t dev, int flag, int mode, struct proc *p)
! 60: {
! 61: int unit = JOYUNIT(dev);
! 62: int i = JOYPART(dev);
! 63: struct joy_softc *sc;
! 64:
! 65: if (unit >= joy_cd.cd_ndevs)
! 66: return (ENXIO);
! 67:
! 68: sc = joy_cd.cd_devs[unit];
! 69: if (sc == NULL)
! 70: return (ENXIO);
! 71:
! 72: if (sc->timeout[i])
! 73: return EBUSY;
! 74:
! 75: sc->x_off[i] = sc->y_off[i] = 0;
! 76: sc->timeout[i] = JOY_TIMEOUT;
! 77: return 0;
! 78: }
! 79:
! 80: int
! 81: joyclose(dev_t dev, int flag, int mode, struct proc *p)
! 82: {
! 83: int unit = JOYUNIT(dev);
! 84: int i = JOYPART(dev);
! 85: struct joy_softc *sc = joy_cd.cd_devs[unit];
! 86:
! 87: sc->timeout[i] = 0;
! 88: return 0;
! 89: }
! 90:
! 91: int
! 92: joyread(dev_t dev, struct uio *uio, int flag)
! 93: {
! 94: int unit = JOYUNIT(dev);
! 95: struct joy_softc *sc = joy_cd.cd_devs[unit];
! 96: struct joystick c;
! 97: int port = sc->port;
! 98: int i, t0, t1;
! 99: int state = 0, x = 0, y = 0;
! 100:
! 101: disable_intr();
! 102: outb(port, 0xff);
! 103: t0 = joy_get_tick();
! 104: t1 = t0;
! 105: i = USEC2TICKS(sc->timeout[JOYPART(dev)]);
! 106: while (t0 - t1 < i) {
! 107: state = inb(port);
! 108: if (JOYPART(dev) == 1)
! 109: state >>= 2;
! 110: t1 = joy_get_tick();
! 111: if (t1 > t0)
! 112: t1 -= TIMER_FREQ / hz;
! 113: if (!x && !(state & 0x01))
! 114: x = t1;
! 115: if (!y && !(state & 0x02))
! 116: y = t1;
! 117: if (x && y)
! 118: break;
! 119: }
! 120: enable_intr();
! 121: c.x = x ? sc->x_off[JOYPART(dev)] + TICKS2USEC(t0 - x) : 0x80000000;
! 122: c.y = y ? sc->y_off[JOYPART(dev)] + TICKS2USEC(t0 - y) : 0x80000000;
! 123: state >>= 4;
! 124: c.b1 = ~state & 1;
! 125: c.b2 = ~(state >> 1) & 1;
! 126: return uiomove((caddr_t) & c, sizeof(struct joystick), uio);
! 127: }
! 128:
! 129: int
! 130: joyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
! 131: {
! 132: int unit = JOYUNIT(dev);
! 133: struct joy_softc *sc = joy_cd.cd_devs[unit];
! 134: int i = JOYPART(dev);
! 135: int x;
! 136:
! 137: switch (cmd) {
! 138: case JOY_SETTIMEOUT:
! 139: x = *(int *) data;
! 140: if (x < 1 || x > 10000) /* 10ms maximum! */
! 141: return EINVAL;
! 142: sc->timeout[i] = x;
! 143: break;
! 144: case JOY_GETTIMEOUT:
! 145: *(int *) data = sc->timeout[i];
! 146: break;
! 147: case JOY_SET_X_OFFSET:
! 148: sc->x_off[i] = *(int *) data;
! 149: break;
! 150: case JOY_SET_Y_OFFSET:
! 151: sc->y_off[i] = *(int *) data;
! 152: break;
! 153: case JOY_GET_X_OFFSET:
! 154: *(int *) data = sc->x_off[i];
! 155: break;
! 156: case JOY_GET_Y_OFFSET:
! 157: *(int *) data = sc->y_off[i];
! 158: break;
! 159: default:
! 160: return ENXIO;
! 161: }
! 162: return 0;
! 163: }
! 164:
! 165: static int
! 166: joy_get_tick(void)
! 167: {
! 168: int low, high;
! 169:
! 170: outb(IO_TIMER1 + TIMER_MODE, TIMER_SEL0);
! 171: low = inb(IO_TIMER1 + TIMER_CNTR0);
! 172: high = inb(IO_TIMER1 + TIMER_CNTR0);
! 173:
! 174: return (high << 8) | low;
! 175: }
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