joy.c revision 111815
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 111815 2003-03-03 12:15:54Z phk $ 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 = { 71111815Sphk .d_open = joyopen, 72111815Sphk .d_close = joyclose, 73111815Sphk .d_read = joyread, 74111815Sphk .d_ioctl = joyioctl, 75111815Sphk .d_name = "joy", 76111815Sphk .d_maj = CDEV_MAJOR, 7747625Sphk}; 7812675Sjulian 7989086Simpdevclass_t joy_devclass; 805897Sjmz 8187384Simpint 8287384Simpjoy_probe(device_t dev) 835897Sjmz{ 845897Sjmz#ifdef WANT_JOYSTICK_CONNECTED 8554156Speter#ifdef notyet 8687384Simp outb(dev->id_iobase, 0xff); 8787384Simp DELAY(10000); /* 10 ms delay */ 8887384Simp return (inb(dev->id_iobase) & 0x0f) != 0x0f; 8987384Simp#else 9087384Simp return (0); 9154156Speter#endif 925897Sjmz#else 9387384Simp return (0); 945897Sjmz#endif 955897Sjmz} 965897Sjmz 9787384Simpint 9887384Simpjoy_attach(device_t dev) 995897Sjmz{ 10087384Simp int unit = device_get_unit(dev); 10187384Simp struct joy_softc *joy = device_get_softc(dev); 1025897Sjmz 10387384Simp joy->rid = 0; 10487384Simp joy->res = bus_alloc_resource(dev, SYS_RES_IOPORT, &joy->rid, 0, ~0, 1, 10587384Simp RF_ACTIVE); 10687384Simp if (joy->res == NULL) 10787384Simp return ENXIO; 10887384Simp joy->bt = rman_get_bustag(joy->res); 10987384Simp joy->port = rman_get_bushandle(joy->res); 11087384Simp joy->timeout[0] = joy->timeout[1] = 0; 11187384Simp joy->d = make_dev(&joy_cdevsw, 0, 0, 0, 0600, "joy%d", unit); 11287384Simp return (0); 1135897Sjmz} 1145897Sjmz 11587384Simpint 11687384Simpjoy_detach(device_t dev) 11787384Simp{ 11887384Simp struct joy_softc *joy = device_get_softc(dev); 11954156Speter 12087384Simp if (joy->res != NULL) 12187384Simp bus_release_resource(dev, SYS_RES_IOPORT, joy->rid, joy->res); 12287384Simp if (joy->d) 12387384Simp destroy_dev(joy->d); 12487384Simp return (0); 12587384Simp} 12654156Speter 12754156Speter 12854156Speterstatic int 12983366Sjulianjoyopen(dev_t dev, int flags, int fmt, struct thread *td) 1305897Sjmz{ 13187384Simp int i = joypart (dev); 13287384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 1335897Sjmz 13487384Simp if (joy->timeout[i]) 13587384Simp return (EBUSY); 13687384Simp joy->x_off[i] = joy->y_off[i] = 0; 13787384Simp joy->timeout[i] = JOY_TIMEOUT; 13887384Simp return (0); 1395897Sjmz} 14054156Speter 14154156Speterstatic int 14283366Sjulianjoyclose(dev_t dev, int flags, int fmt, struct thread *td) 1435897Sjmz{ 14487384Simp int i = joypart (dev); 14587384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 1465897Sjmz 14787384Simp joy->timeout[i] = 0; 14887384Simp return (0); 1495897Sjmz} 1505897Sjmz 15154156Speterstatic int 15254156Speterjoyread(dev_t dev, struct uio *uio, int flag) 1535897Sjmz{ 15487384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 15587384Simp bus_space_handle_t port = joy->port; 15687384Simp bus_space_tag_t bt = joy->bt; 15787384Simp struct timespec t, start, end; 15887384Simp int state = 0; 15987384Simp struct timespec x, y; 16087384Simp struct joystick c; 16197554Salfred#ifndef __i386__ 16287384Simp int s; 1638876Srgrimes 16487384Simp s = splhigh(); 16554156Speter#else 16687384Simp disable_intr (); 16754156Speter#endif 16887384Simp bus_space_write_1 (bt, port, 0, 0xff); 16987384Simp nanotime(&start); 17087384Simp end.tv_sec = 0; 17187384Simp end.tv_nsec = joy->timeout[joypart(dev)] * 1000; 17287384Simp timespecadd(&end, &start); 17387384Simp t = start; 17487384Simp timespecclear(&x); 17587384Simp timespecclear(&y); 17687384Simp while (timespeccmp(&t, &end, <)) { 17787384Simp state = bus_space_read_1 (bt, port, 0); 17887384Simp if (joypart(dev) == 1) 17987384Simp state >>= 2; 18087384Simp nanotime(&t); 18187384Simp if (!timespecisset(&x) && !(state & 0x01)) 18287384Simp x = t; 18387384Simp if (!timespecisset(&y) && !(state & 0x02)) 18487384Simp y = t; 18587384Simp if (timespecisset(&x) && timespecisset(&y)) 18687384Simp break; 18787384Simp } 18897554Salfred#ifndef __i386__ 18987384Simp splx(s); 19054156Speter#else 19187384Simp enable_intr (); 19254156Speter#endif 19387384Simp if (timespecisset(&x)) { 19487384Simp timespecsub(&x, &start); 19587384Simp c.x = joy->x_off[joypart(dev)] + x.tv_nsec / 1000; 19687384Simp } else 19787384Simp c.x = 0x80000000; 19887384Simp if (timespecisset(&y)) { 19987384Simp timespecsub(&y, &start); 20087384Simp c.y = joy->y_off[joypart(dev)] + y.tv_nsec / 1000; 20187384Simp } else 20287384Simp c.y = 0x80000000; 20387384Simp state >>= 4; 20487384Simp c.b1 = ~state & 1; 20587384Simp c.b2 = ~(state >> 1) & 1; 20687384Simp return (uiomove((caddr_t)&c, sizeof(struct joystick), uio)); 2075897Sjmz} 20812675Sjulian 20954156Speterstatic int 21083366Sjulianjoyioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td) 2115897Sjmz{ 21287384Simp struct joy_softc *joy = JOY_SOFTC(UNIT(dev)); 21387384Simp int i = joypart (dev); 21487384Simp int x; 2155897Sjmz 21687384Simp switch (cmd) { 21787384Simp case JOY_SETTIMEOUT: 21887384Simp x = *(int *) data; 21987384Simp if (x < 1 || x > 10000) /* 10ms maximum! */ 22087384Simp return EINVAL; 22187384Simp joy->timeout[i] = x; 22287384Simp break; 22387384Simp case JOY_GETTIMEOUT: 22487384Simp *(int *) data = joy->timeout[i]; 22587384Simp break; 22687384Simp case JOY_SET_X_OFFSET: 22787384Simp joy->x_off[i] = *(int *) data; 22887384Simp break; 22987384Simp case JOY_SET_Y_OFFSET: 23087384Simp joy->y_off[i] = *(int *) data; 23187384Simp break; 23287384Simp case JOY_GET_X_OFFSET: 23387384Simp *(int *) data = joy->x_off[i]; 23487384Simp break; 23587384Simp case JOY_GET_Y_OFFSET: 23687384Simp *(int *) data = joy->y_off[i]; 23787384Simp break; 23887384Simp default: 23987384Simp return (ENOTTY); 24087384Simp } 24187384Simp return (0); 2425897Sjmz} 243