input/linux/joystick.c

   1 #include <conf.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4 #include "joystick.h"
   5 #include <sys/ioctl.h>
   6 #include <fcntl.h>
   7 #include <unistd.h>
   8
   9 #include "timer.h"
  10 #include "pstypes.h"
  11 #include "mono.h"
  12 #include "joy.h"
  13
  14 char joy_installed = 0;
  15 char joy_present = 0;
  16
  17 joystick_device j_joystick[4];
  18 joystick_axis j_axis[MAX_AXES];
  19 joystick_button j_button[MAX_BUTTONS];
  20
  21 int j_num_axes = 0, j_num_buttons = 0;
  22 int timer_rate;
  23
  24 int j_axes_in_sticks[4];        /* number of axes in the first [x] sticks */
  25 int j_buttons_in_sticks[4];     /* number of buttons in the first [x] sticks */
  26
  27 int joy_deadzone = 0;
  28
  29 int j_Get_joydev_axis_number (int all_axis_number) {
  30         int i, joy_axis_number = all_axis_number;
  31
  32         for (i = 0; i < j_axis[all_axis_number].joydev; i++) {
  33                 joy_axis_number -= j_joystick[i].num_axes;
  34         }
  35
  36         return joy_axis_number;
  37 }
  38
  39
  40 int j_Get_joydev_button_number (int all_button_number) {
  41         int i, joy_button_number = all_button_number;
  42
  43         for (i = 0; i < j_button[all_button_number].joydev; i++) {
  44                 joy_button_number -= j_joystick[i].num_buttons;
  45         }
  46
  47         return joy_button_number;
  48 }
  49
  50
  51 int j_Update_state () {
  52         int num_processed = 0, i;
  53         struct js_event current_event;
  54         struct JS_DATA_TYPE joy_data;
  55
  56         for (i = 0; i < j_num_buttons; i++) {
  57                 //changed 6/24/1999 to finally squish the timedown bug - Owen Evans
  58                 if (j_button[i].state != j_button[i].last_state) {
  59                         if (j_button[i].state) {
  60                                 j_button[i].downcount++;
  61                                 j_button[i].timedown = timer_get_fixed_seconds();
  62                         }
  63                 }
  64                 //end changed - OE
  65                 j_button[i].last_state = j_button[i].state;
  66         }
  67
  68         for (i = 0; i < 4; i++) {
  69                 if (j_joystick[i].buffer >= 0) {
  70                         if (j_joystick[i].version) {
  71                                 while (read (j_joystick[i].buffer, &current_event, sizeof (struct js_event)) > 0) {
  72                                         num_processed++;
  73                                         switch (current_event.type & ~JS_EVENT_INIT) {
  74                                                 case JS_EVENT_AXIS:
  75                                                         j_axis[j_axes_in_sticks[i] + current_event.number].value = current_event.value;
  76                                                         break;
  77                                                 case JS_EVENT_BUTTON:
  78                                                         j_button[j_buttons_in_sticks[i] + current_event.number].state = current_event.value;
  79                                                         break;
  80                                         }
  81                                 }
  82                         } else {
  83                                 read (j_joystick[i].buffer, &joy_data, JS_RETURN);
  84                                 j_axis[j_axes_in_sticks[i] + 0].value = joy_data.x;
  85                                 j_axis[j_axes_in_sticks[i] + 1].value = joy_data.y;
  86                                 j_button[j_buttons_in_sticks[i] + 0].state = (joy_data.buttons & 0x01);
  87                                 j_button[j_buttons_in_sticks[i] + 1].state = (joy_data.buttons & 0x02) >> 1;
  88                         }
  89                 }
  90         }
  91
  92         return num_processed;
  93 }
  94
  95
  96 void joy_set_cal_vals(int *axis_min, int *axis_center, int *axis_max) {
  97         int i;
  98
  99         for (i = 0; i < 4; i++) {
 100                 j_axis[i].center_val = axis_center[i];
 101                 j_axis[i].min_val = axis_min[i];
 102                 j_axis[i].max_val = axis_max[i];
 103         }
 104 }
 105
 106
 107 void joy_get_cal_vals(int *axis_min, int *axis_center, int *axis_max) {
 108         int i;
 109
 110         //edited 05/18/99 Matt Mueller - we should return all axes instead of j_num_axes, since they are all given to us in joy_set_cal_vals ( and because checker complains :)
 111         for (i = 0; i < 4; i++) {
 112         //end edit -MM
 113                 axis_center[i] = j_axis[i].center_val;
 114                 axis_min[i] = j_axis[i].min_val;
 115                 axis_max[i] = j_axis[i].max_val;
 116         }
 117 }
 118
 119
 120 void joy_set_min (int axis_number, int value) {
 121         j_axis[axis_number].min_val = value;
 122 }
 123
 124
 125 void joy_set_center (int axis_number, int value) {
 126         j_axis[axis_number].center_val = value;
 127 }
 128
 129
 130 void joy_set_max (int axis_number, int value) {
 131         j_axis[axis_number].max_val = value;
 132 }
 133
 134
 135 ubyte joy_get_present_mask () {
 136         return 1;
 137 }
 138
 139
 140 void joy_set_timer_rate (int max_value) {
 141         timer_rate = max_value;
 142 }
 143
 144
 145 int joy_get_timer_rate () {
 146         return timer_rate;
 147 }
 148
 149
 150 void joy_flush () {
 151         int i;
 152
 153         if (!joy_installed) return;
 154
 155         for (i = 0; i < j_num_buttons; i++) {
 156                 j_button[i].timedown = 0;
 157                 j_button[i].downcount = 0;
 158         }
 159
 160 }
 161
 162
 163 ubyte joystick_read_raw_axis (ubyte mask, int *axes) {
 164         int i;
 165
 166         j_Update_state();
 167
 168         for (i = 0; i < j_num_axes; i++) {
 169                 axes[i] = j_axis[i].value;
 170         }
 171
 172         return 0;
 173 }
 174
 175
 176 /* joy_init () is pretty huge, a bit klunky, and by no means pretty.  But who cares?  It does the job and it's only run once. */
 177
 178
 179 int joy_init () {
 180         int i, j;
 181
 182         if (joy_installed) return 0;
 183         joy_flush ();
 184
 185         if (!joy_installed)     {
 186
 187                 printf ("Initializing joystick... ");
 188
 189                 j_joystick[0].buffer = open ("/dev/js0", O_NONBLOCK);
 190                 j_joystick[1].buffer = open ("/dev/js1", O_NONBLOCK);
 191                 j_joystick[2].buffer = open ("/dev/js2", O_NONBLOCK);
 192                 j_joystick[3].buffer = open ("/dev/js3", O_NONBLOCK);
 193
 194                 if (j_joystick[0].buffer >= 0 || j_joystick[1].buffer >= 0 || j_joystick[2].buffer >= 0 || j_joystick[3].buffer >= 0) {
 195                         printf ("found: ");
 196
 197                         for (i = 0; i < 4; i++) {
 198                                 if (j_joystick[i].buffer >= 0) {
 199                                         ioctl (j_joystick[i].buffer, JSIOCGAXES, &j_joystick[i].num_axes);
 200                                         ioctl (j_joystick[i].buffer, JSIOCGBUTTONS, &j_joystick[i].num_buttons);
 201                                         ioctl (j_joystick[i].buffer, JSIOCGVERSION, &j_joystick[i].version);
 202                                         if (!j_joystick[i].version) {
 203                                                 j_joystick[i].num_axes = 2;
 204                                                 j_joystick[i].num_buttons = 2;
 205                                                 printf ("js%d (v0.x)  " , i);
 206                                         } else {
 207                                                 printf ("js%d (v%d.%d.%d)  ",
 208                                                         i,
 209                                                         (j_joystick[i].version & 0xff0000) >> 16,
 210                                                         (j_joystick[i].version & 0xff00) >> 8,
 211                                                         j_joystick[i].version & 0xff);
 212                                         }
 213
 214                                         for (j = j_num_axes; j < (j_num_axes + j_joystick[i].num_axes); j++) {
 215                                                 j_axis[j].joydev = i;
 216                                                 if (j_joystick[i].version) {
 217                                                         j_axis[j].center_val = 0;
 218                                                         j_axis[j].max_val = 32767;
 219                                                         j_axis[j].min_val = -32767;
 220                                                 }
 221                                         }
 222                                         for (j = j_num_buttons; j < (j_num_buttons + j_joystick[i].num_buttons); j++) {
 223                                                 j_button[j].joydev = i;
 224                                         }
 225
 226                                         j_num_axes += j_joystick[i].num_axes;
 227                                         j_num_buttons += j_joystick[i].num_buttons;
 228
 229                                 } else {
 230                                         j_joystick[i].num_buttons = 0;
 231                                         j_joystick[i].num_axes = 0;
 232                                 }
 233
 234                                 for (j = 0; j < i; j++) {
 235                                         j_axes_in_sticks[i] += j_joystick[j].num_axes;
 236                                         j_buttons_in_sticks[i] += j_joystick[j].num_buttons;
 237                                 }
 238                         }
 239                 } else {
 240                         printf ("no joysticks found\n");
 241                         return 0;
 242                 }
 243
 244                 printf ("\n");
 245
 246                 if (j_num_axes > MAX_AXES)
 247                         j_num_axes = MAX_AXES;
 248                 if (j_num_buttons > MAX_BUTTONS)
 249                         j_num_buttons = MAX_BUTTONS;
 250
 251                 joy_present = 1;
 252                 joy_installed = 1;
 253                 return 1;
 254         }
 255
 256         return 1;
 257 }
 258
 259
 260 void joy_close() {
 261         int i;
 262
 263         if (!joy_installed) return;
 264
 265         for (i = 0; i < 4; i++) {
 266                 if (j_joystick[i].buffer>=0) {
 267                         printf ("closing js%d\n", i);
 268                         close (j_joystick[i].buffer);
 269                 }
 270                 j_joystick[i].buffer=-1;
 271         }
 272
 273         joy_present=0;
 274         joy_installed=0;
 275 }
 276
 277
 278 void joy_set_cen() {
 279 }
 280
 281
 282 int joy_get_scaled_reading(int raw, int axis_num)
 283 {
 284  int d, x;
 285
 286   raw -= j_axis[axis_num].center_val;
 287
 288    if (raw < 0)
 289     d = j_axis[axis_num].center_val - j_axis[axis_num].min_val;
 290    else if (raw > 0)
 291     d = j_axis[axis_num].max_val - j_axis[axis_num].center_val;
 292    else
 293     d = 0;
 294
 295    if (d)
 296     x = ((raw << 7) / d);
 297    else
 298     x = 0;
 299
 300    if ( x < -128 )
 301     x = -128;
 302    if ( x > 127 )
 303     x = 127;
 304
 305 //added on 4/13/99 by Victor Rachels to add deadzone control
 306   d =  (joy_deadzone) * 6;
 307    if ((x > (-1*d)) && (x < d))
 308     x = 0;
 309 //end this section addition -VR
 310
 311   return x;
 312 }
 313
 314
 315 void joy_get_pos(int *x, int *y) {
 316         int axis[MAX_AXES];
 317
 318         if ((!joy_installed)||(!joy_present)) { *x=*y=0; return; }
 319
 320         joystick_read_raw_axis (JOY_ALL_AXIS, axis);
 321
 322         *x = joy_get_scaled_reading( axis[0], 0 );
 323         *y = joy_get_scaled_reading( axis[1], 1 );
 324 }
 325
 326
 327 int joy_get_btns () {
 328         return 0;
 329 }
 330
 331
 332 int joy_get_button_state (int btn) {
 333   if(btn >= j_num_buttons)
 334    return 0;
 335         j_Update_state ();
 336
 337         return j_button[btn].state;
 338 }
 339
 340
 341 int joy_get_button_down_cnt (int btn) {
 342         int downcount;
 343
 344         j_Update_state ();
 345
 346         downcount = j_button[btn].downcount;
 347         j_button[btn].downcount = 0;
 348
 349         return downcount;
 350 }
 351
 352
 353 //changed 6/24/99 to finally squish the timedown bug - Owen Evans
 354 fix joy_get_button_down_time(int btn)  {
 355         fix downtime;
 356         j_Update_state ();
 357
 358         if (j_button[btn].state) {
 359                 downtime = timer_get_fixed_seconds() - j_button[btn].timedown;
 360                 j_button[btn].timedown = timer_get_fixed_seconds();
 361         } else {
 362                 downtime = 0;
 363         }
 364
 365         return downtime;
 366 }
 367 //end changed - OE
 368
 369 void joy_poll() {
 370
 371 }
 372
 373
 374 void joy_set_slow_reading(int flag) {
 375
 376 }
 377