1/*- 2 * Copyright (c) 1995 Jean-Marc Zucconi 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: releng/11.0/sys/dev/joy/joy.c 191054 2009-04-14 11:23:09Z ed $"); 32 33#include <sys/param.h> 34#include <sys/systm.h> 35#include <sys/conf.h> 36#include <sys/uio.h> 37#include <sys/kernel.h> 38#include <sys/module.h> 39#include <sys/bus.h> 40#include <machine/bus.h> 41#include <machine/resource.h> 42#include <sys/rman.h> 43#include <sys/time.h> 44#include <sys/joystick.h> 45#include <dev/joy/joyvar.h> 46 47/* The game port can manage 4 buttons and 4 variable resistors (usually 2 48 * joysticks, each with 2 buttons and 2 pots.) via the port at address 0x201. 49 * Getting the state of the buttons is done by reading the game port: 50 * buttons 1-4 correspond to bits 4-7 and resistors 1-4 (X1, Y1, X2, Y2) 51 * to bits 0-3. 52 * if button 1 (resp 2, 3, 4) is pressed, the bit 4 (resp 5, 6, 7) is set to 0 53 * to get the value of a resistor, write the value 0xff at port and 54 * wait until the corresponding bit returns to 0. 55 */ 56 57#define joypart(d) (dev2unit(d)&1) 58#ifndef JOY_TIMEOUT 59#define JOY_TIMEOUT 2000 /* 2 milliseconds */ 60#endif 61 62static d_open_t joyopen; 63static d_close_t joyclose; 64static d_read_t joyread; 65static d_ioctl_t joyioctl; 66 67static struct cdevsw joy_cdevsw = { 68 .d_version = D_VERSION, 69 .d_flags = D_NEEDGIANT, 70 .d_open = joyopen, 71 .d_close = joyclose, 72 .d_read = joyread, 73 .d_ioctl = joyioctl, 74 .d_name = "joy", 75}; 76 77devclass_t joy_devclass; 78 79int 80joy_probe(device_t dev) 81{ 82#ifdef WANT_JOYSTICK_CONNECTED 83#ifdef notyet 84 outb(dev->id_iobase, 0xff); 85 DELAY(10000); /* 10 ms delay */ 86 return (inb(dev->id_iobase) & 0x0f) != 0x0f; 87#else 88 return (0); 89#endif 90#else 91 return (0); 92#endif 93} 94 95int 96joy_attach(device_t dev) 97{ 98 int unit = device_get_unit(dev); 99 struct joy_softc *joy = device_get_softc(dev); 100 101 joy->rid = 0; 102 joy->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &joy->rid, 103 RF_ACTIVE|RF_SHAREABLE); 104 if (joy->res == NULL) 105 return ENXIO; 106 joy->bt = rman_get_bustag(joy->res); 107 joy->port = rman_get_bushandle(joy->res); 108 joy->timeout[0] = joy->timeout[1] = 0; 109 joy->d = make_dev(&joy_cdevsw, unit, 0, 0, 0600, "joy%d", unit); 110 joy->d->si_drv1 = joy; 111 return (0); 112} 113 114int 115joy_detach(device_t dev) 116{ 117 struct joy_softc *joy = device_get_softc(dev); 118 119 if (joy->res != NULL) 120 bus_release_resource(dev, SYS_RES_IOPORT, joy->rid, joy->res); 121 if (joy->d) 122 destroy_dev(joy->d); 123 return (0); 124} 125 126 127static int 128joyopen(struct cdev *dev, int flags, int fmt, struct thread *td) 129{ 130 int i = joypart (dev); 131 struct joy_softc *joy = dev->si_drv1; 132 133 if (joy->timeout[i]) 134 return (EBUSY); 135 joy->x_off[i] = joy->y_off[i] = 0; 136 joy->timeout[i] = JOY_TIMEOUT; 137 return (0); 138} 139 140static int 141joyclose(struct cdev *dev, int flags, int fmt, struct thread *td) 142{ 143 int i = joypart (dev); 144 struct joy_softc *joy = dev->si_drv1; 145 146 joy->timeout[i] = 0; 147 return (0); 148} 149 150static int 151joyread(struct cdev *dev, struct uio *uio, int flag) 152{ 153 struct joy_softc *joy = dev->si_drv1; 154 bus_space_handle_t port = joy->port; 155 bus_space_tag_t bt = joy->bt; 156 struct timespec t, start, end; 157 int state = 0; 158 struct timespec x, y; 159 struct joystick c; 160#ifndef __i386__ 161 int s; 162 163 s = splhigh(); 164#else 165 disable_intr (); 166#endif 167 nanotime(&t); 168 end.tv_sec = 0; 169 end.tv_nsec = joy->timeout[joypart(dev)] * 1000; 170 timespecadd(&end, &t); 171 for (; timespeccmp(&t, &end, <) && (bus_space_read_1(bt, port, 0) & 0x0f); nanotime(&t)) 172 ; /* nothing */ 173 bus_space_write_1 (bt, port, 0, 0xff); 174 nanotime(&start); 175 end.tv_sec = 0; 176 end.tv_nsec = joy->timeout[joypart(dev)] * 1000; 177 timespecadd(&end, &start); 178 t = start; 179 timespecclear(&x); 180 timespecclear(&y); 181 while (timespeccmp(&t, &end, <)) { 182 state = bus_space_read_1 (bt, port, 0); 183 if (joypart(dev) == 1) 184 state >>= 2; 185 nanotime(&t); 186 if (!timespecisset(&x) && !(state & 0x01)) 187 x = t; 188 if (!timespecisset(&y) && !(state & 0x02)) 189 y = t; 190 if (timespecisset(&x) && timespecisset(&y)) 191 break; 192 } 193#ifndef __i386__ 194 splx(s); 195#else 196 enable_intr (); 197#endif 198 if (timespecisset(&x)) { 199 timespecsub(&x, &start); 200 c.x = joy->x_off[joypart(dev)] + x.tv_nsec / 1000; 201 } else 202 c.x = 0x80000000; 203 if (timespecisset(&y)) { 204 timespecsub(&y, &start); 205 c.y = joy->y_off[joypart(dev)] + y.tv_nsec / 1000; 206 } else 207 c.y = 0x80000000; 208 state >>= 4; 209 c.b1 = ~state & 1; 210 c.b2 = ~(state >> 1) & 1; 211 return (uiomove((caddr_t)&c, sizeof(struct joystick), uio)); 212} 213 214static int 215joyioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td) 216{ 217 struct joy_softc *joy = dev->si_drv1; 218 int i = joypart (dev); 219 int x; 220 221 switch (cmd) { 222 case JOY_SETTIMEOUT: 223 x = *(int *) data; 224 if (x < 1 || x > 10000) /* 10ms maximum! */ 225 return EINVAL; 226 joy->timeout[i] = x; 227 break; 228 case JOY_GETTIMEOUT: 229 *(int *) data = joy->timeout[i]; 230 break; 231 case JOY_SET_X_OFFSET: 232 joy->x_off[i] = *(int *) data; 233 break; 234 case JOY_SET_Y_OFFSET: 235 joy->y_off[i] = *(int *) data; 236 break; 237 case JOY_GET_X_OFFSET: 238 *(int *) data = joy->x_off[i]; 239 break; 240 case JOY_GET_Y_OFFSET: 241 *(int *) data = joy->y_off[i]; 242 break; 243 default: 244 return (ENOTTY); 245 } 246 return (0); 247} 248