/* $NetBSD: joy.c,v 1.7 1997/06/14 11:38:30 mycroft Exp $ */ /* * XXX This _really_ should be rewritten such that it doesn't * XXX rely in the i386 timer! */ /*- * Copyright (c) 1995 Jean-Marc Zucconi * All rights reserved. * * Ported to NetBSD by Matthieu Herrb * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* XXX XXX XXX */ /* * 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 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 joy_cd = { NULL, "joy", DV_DULL }; void joyattach(sc) struct joy_softc *sc; { sc->timeout[0] = sc->timeout[1] = 0; bus_space_write_1(sc->sc_iot, sc->sc_ioh, 0, 0xff); DELAY(10000); /* 10 ms delay */ printf("%s: joystick%sconnected\n", sc->sc_dev.dv_xname, (bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0) & 0x0f) == 0x0f ? " not " : " "); } 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 >= joy_cd.cd_ndevs) return (ENXIO); sc = joy_cd.cd_devs[unit]; if (sc == 0) return (ENXIO); 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 = joy_cd.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 = joy_cd.cd_devs[unit]; struct joystick c; int i, t0, t1; int state = 0, x = 0, y = 0; bus_space_tag_t iot = sc->sc_iot; bus_space_handle_t ioh = sc->sc_ioh; disable_intr(); bus_space_write_1(iot, ioh, 0, 0xff); t0 = get_tick(); t1 = t0; i = USEC2TICKS(sc->timeout[JOYPART(dev)]); while (t0 - t1 < i) { state = bus_space_read_1(iot, ioh, 0); 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); struct joy_softc *sc = joy_cd.cd_devs[unit]; int i = JOYPART(dev); 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; }