joy.c revision 97748
15897Sjmz/*- 25897Sjmz * Copyright (c) 1995 Jean-Marc Zucconi 35897Sjmz * All rights reserved. 45897Sjmz * 55897Sjmz * Redistribution and use in source and binary forms, with or without 65897Sjmz * modification, are permitted provided that the following conditions 75897Sjmz * are met: 85897Sjmz * 1. Redistributions of source code must retain the above copyright 95897Sjmz * notice, this list of conditions and the following disclaimer 105897Sjmz * in this position and unchanged. 115897Sjmz * 2. Redistributions in binary form must reproduce the above copyright 125897Sjmz * notice, this list of conditions and the following disclaimer in the 135897Sjmz * documentation and/or other materials provided with the distribution. 145897Sjmz * 3. The name of the author may not be used to endorse or promote products 1597748Sschweikh * derived from this software without specific prior written permission 165897Sjmz * 175897Sjmz * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 185897Sjmz * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 195897Sjmz * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 205897Sjmz * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 215897Sjmz * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 225897Sjmz * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235897Sjmz * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245897Sjmz * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255897Sjmz * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 265897Sjmz * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275897Sjmz * 2851658Sphk * $FreeBSD: head/sys/dev/joy/joy.c 97748 2002-06-02 20:05:59Z schweikh $ 295897Sjmz */ 305897Sjmz 317430Sbde#include <sys/param.h> 327430Sbde#include <sys/systm.h> 3312675Sjulian#include <sys/conf.h> 3434924Sbde#include <sys/uio.h> 3554156Speter#include <sys/kernel.h> 3654156Speter#include <sys/module.h> 3754156Speter#include <sys/bus.h> 3854156Speter#include <machine/bus.h> 3954156Speter#include <machine/resource.h> 4054156Speter#include <sys/rman.h> 4154156Speter#include <sys/time.h> 4254156Speter#include <sys/joystick.h> 4387384Simp#include <dev/joy/joyvar.h> 446734Sbde 458876Srgrimes/* The game port can manage 4 buttons and 4 variable resistors (usually 2 465897Sjmz * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201. 475897Sjmz * Getting the state of the buttons is done by reading the game port: 485897Sjmz * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2) 495897Sjmz * to bits 0-3. 505897Sjmz * if button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5, 6, 7) is set to 0 515897Sjmz * to get the value of a resistor, write the value 0xff at port and 525897Sjmz * wait until the corresponding bit returns to 0. 535897Sjmz */ 545897Sjmz 5546570Speter#define joypart(d) (minor(d)&1) 5646570Speter#define UNIT(d) ((minor(d)>>1)&3) 575897Sjmz#ifndef JOY_TIMEOUT 585897Sjmz#define JOY_TIMEOUT 2000 /* 2 milliseconds */ 595897Sjmz#endif 605897Sjmz 6154156Speter#define JOY_SOFTC(unit) (struct joy_softc *) \ 6254156Speter devclass_get_softc(joy_devclass,(unit)) 635897Sjmz 6412675Sjulian#define CDEV_MAJOR 51 6512675Sjulianstatic d_open_t joyopen; 6612675Sjulianstatic d_close_t joyclose; 6712675Sjulianstatic d_read_t joyread; 6812675Sjulianstatic d_ioctl_t joyioctl; 6912675Sjulian 7047625Sphkstatic struct cdevsw joy_cdevsw = { 7147625Sphk /* open */ joyopen, 7247625Sphk /* close */ joyclose, 7347625Sphk /* read */ joyread, 7447625Sphk /* write */ nowrite, 7547625Sphk /* ioctl */ joyioctl, 7647625Sphk /* poll */ nopoll, 7747625Sphk /* mmap */ nommap, 7847625Sphk /* strategy */ nostrategy, 7947625Sphk /* name */ "joy", 8047625Sphk /* maj */ CDEV_MAJOR, 8147625Sphk /* dump */ nodump, 8247625Sphk /* psize */ nopsize, 8347625Sphk /* flags */ 0, 8447625Sphk}; 8512675Sjulian 8689086Simpdevclass_t joy_devclass; 875897Sjmz 8887384Simpint 8987384Simpjoy_probe(device_t dev) 905897Sjmz{ 915897Sjmz#ifdef WANT_JOYSTICK_CONNECTED 9254156Speter#ifdef notyet 9387384Simp outb(dev->id_iobase, 0xff); 9487384Simp DELAY(10000); /* 10 ms delay */ 9587384Simp return (inb(dev->id_iobase) & 0x0f) != 0x0f; 9687384Simp#else 9787384Simp return (0); 9854156Speter#endif 995897Sjmz#else 10087384Simp return (0); 1015897Sjmz#endif 1025897Sjmz} 1035897Sjmz 10487384Simpint 10587384Simpjoy_attach(device_t dev) 1065897Sjmz{ 10787384Simp int unit = device_get_unit(dev); 10887384Simp struct joy_softc *joy = device_get_softc(dev); 1095897Sjmz 11087384Simp joy->rid = 0; 11187384Simp joy->res = bus_alloc_resource(dev, SYS_RES_IOPORT, &joy->rid, 0, ~0, 1, 11287384Simp RF_ACTIVE); 11387384Simp if (joy->res == NULL) 11487384Simp return ENXIO; 11587384Simp joy->bt = rman_get_bustag(joy->res); 11687384Simp joy->port = rman_get_bushandle(joy->res); 11787384Simp joy->timeout[0] = joy->timeout[1] = 0; 11887384Simp joy->d = make_dev(&joy_cdevsw, 0, 0, 0, 0600, "joy%d", unit); 11987384Simp return (0); 1205897Sjmz} 1215897Sjmz 12287384Simpint 12387384Simpjoy_detach(device_t dev) 12487384Simp{ 12587384Simp struct joy_softc *joy = device_get_softc(dev); 12654156Speter 12787384Simp if (joy->res != NULL) 12887384Simp bus_release_resource(dev, SYS_RES_IOPORT, joy->rid, joy->res); 12987384Simp if (joy->d) 13087384Simp destroy_dev(joy->d); 13187384Simp return (0); 13287384Simp} 13354156Speter 13454156Speter 13554156Speterstatic int 13683366Sjulianjoyopen(dev_t dev, int flags, int fmt, struct thread *td) 1375897Sjmz{ 13887384Simp int i = joypart (dev); 13987384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 1405897Sjmz 14187384Simp if (joy->timeout[i]) 14287384Simp return (EBUSY); 14387384Simp joy->x_off[i] = joy->y_off[i] = 0; 14487384Simp joy->timeout[i] = JOY_TIMEOUT; 14587384Simp return (0); 1465897Sjmz} 14754156Speter 14854156Speterstatic int 14983366Sjulianjoyclose(dev_t dev, int flags, int fmt, struct thread *td) 1505897Sjmz{ 15187384Simp int i = joypart (dev); 15287384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 1535897Sjmz 15487384Simp joy->timeout[i] = 0; 15587384Simp return (0); 1565897Sjmz} 1575897Sjmz 15854156Speterstatic int 15954156Speterjoyread(dev_t dev, struct uio *uio, int flag) 1605897Sjmz{ 16187384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 16287384Simp bus_space_handle_t port = joy->port; 16387384Simp bus_space_tag_t bt = joy->bt; 16487384Simp struct timespec t, start, end; 16587384Simp int state = 0; 16687384Simp struct timespec x, y; 16787384Simp struct joystick c; 16897554Salfred#ifndef __i386__ 16987384Simp int s; 1708876Srgrimes 17187384Simp s = splhigh(); 17254156Speter#else 17387384Simp disable_intr (); 17454156Speter#endif 17587384Simp bus_space_write_1 (bt, port, 0, 0xff); 17687384Simp nanotime(&start); 17787384Simp end.tv_sec = 0; 17887384Simp end.tv_nsec = joy->timeout[joypart(dev)] * 1000; 17987384Simp timespecadd(&end, &start); 18087384Simp t = start; 18187384Simp timespecclear(&x); 18287384Simp timespecclear(&y); 18387384Simp while (timespeccmp(&t, &end, <)) { 18487384Simp state = bus_space_read_1 (bt, port, 0); 18587384Simp if (joypart(dev) == 1) 18687384Simp state >>= 2; 18787384Simp nanotime(&t); 18887384Simp if (!timespecisset(&x) && !(state & 0x01)) 18987384Simp x = t; 19087384Simp if (!timespecisset(&y) && !(state & 0x02)) 19187384Simp y = t; 19287384Simp if (timespecisset(&x) && timespecisset(&y)) 19387384Simp break; 19487384Simp } 19597554Salfred#ifndef __i386__ 19687384Simp splx(s); 19754156Speter#else 19887384Simp enable_intr (); 19954156Speter#endif 20087384Simp if (timespecisset(&x)) { 20187384Simp timespecsub(&x, &start); 20287384Simp c.x = joy->x_off[joypart(dev)] + x.tv_nsec / 1000; 20387384Simp } else 20487384Simp c.x = 0x80000000; 20587384Simp if (timespecisset(&y)) { 20687384Simp timespecsub(&y, &start); 20787384Simp c.y = joy->y_off[joypart(dev)] + y.tv_nsec / 1000; 20887384Simp } else 20987384Simp c.y = 0x80000000; 21087384Simp state >>= 4; 21187384Simp c.b1 = ~state & 1; 21287384Simp c.b2 = ~(state >> 1) & 1; 21387384Simp return (uiomove((caddr_t)&c, sizeof(struct joystick), uio)); 2145897Sjmz} 21512675Sjulian 21654156Speterstatic int 21783366Sjulianjoyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 2185897Sjmz{ 21987384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 22087384Simp int i = joypart (dev); 22187384Simp int x; 2225897Sjmz 22387384Simp switch (cmd) { 22487384Simp case JOY_SETTIMEOUT: 22587384Simp x = *(int *) data; 22687384Simp if (x < 1 || x > 10000) /* 10ms maximum! */ 22787384Simp return EINVAL; 22887384Simp joy->timeout[i] = x; 22987384Simp break; 23087384Simp case JOY_GETTIMEOUT: 23187384Simp *(int *) data = joy->timeout[i]; 23287384Simp break; 23387384Simp case JOY_SET_X_OFFSET: 23487384Simp joy->x_off[i] = *(int *) data; 23587384Simp break; 23687384Simp case JOY_SET_Y_OFFSET: 23787384Simp joy->y_off[i] = *(int *) data; 23887384Simp break; 23987384Simp case JOY_GET_X_OFFSET: 24087384Simp *(int *) data = joy->x_off[i]; 24187384Simp break; 24287384Simp case JOY_GET_Y_OFFSET: 24387384Simp *(int *) data = joy->y_off[i]; 24487384Simp break; 24587384Simp default: 24687384Simp return (ENOTTY); 24787384Simp } 24887384Simp return (0); 2495897Sjmz} 250