input/linux_joystick.c

   1 #include <conf.h>
   2
   3 #ifdef __ENV_LINUX__
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 //#include "joystick.h"
   7 #include <sys/ioctl.h>
   8 #include <fcntl.h>
   9 #include <unistd.h>
  10
  11 #include "timer.h"
  12 #include "pstypes.h"
  13 #include "mono.h"
  14 #include "joy.h"
  15
  16 char joy_installed = 0;
  17 char joy_present = 0;
  18
  19 joystick_device j_joystick[4];
  20 joystick_axis j_axis[MAX_AXES];
  21 joystick_button j_button[MAX_BUTTONS];
  22
  23 int j_num_axes = 0, j_num_buttons = 0;
  24 int timer_rate;
  25
  26 int j_axes_in_sticks[4];        /* number of axes in the first [x] sticks */
  27 int j_buttons_in_sticks[4];     /* number of buttons in the first [x] sticks */
  28
  29 int joy_deadzone = 0;
  30
  31 int j_Get_joydev_axis_number (int all_axis_number) {
  32         int i, joy_axis_number = all_axis_number;
  33
  34         for (i = 0; i < j_axis[all_axis_number].joydev; i++) {
  35                 joy_axis_number -= j_joystick[i].num_axes;
  36         }
  37
  38         return joy_axis_number;
  39 }
  40
  41
  42 int j_Get_joydev_button_number (int all_button_number) {
  43         int i, joy_button_number = all_button_number;
  44
  45         for (i = 0; i < j_button[all_button_number].joydev; i++) {
  46                 joy_button_number -= j_joystick[i].num_buttons;
  47         }
  48
  49         return joy_button_number;
  50 }
  51
  52
  53 int j_Update_state () {
  54 /*      int num_processed = 0, i;
  55         struct js_event current_event;
  56         struct JS_DATA_TYPE joy_data;
  57
  58         for (i = 0; i < j_num_buttons; i++) {
  59                 //changed 6/24/1999 to finally squish the timedown bug - Owen Evans
  60                 if (j_button[i].state != j_button[i].last_state) {
  61                         if (j_button[i].state) {
  62                                 j_button[i].downcount++;
  63                                 j_button[i].timedown = timer_get_fixed_seconds();
  64                         }
  65                 }
  66                 //end changed - OE
  67                 j_button[i].last_state = j_button[i].state;
  68         }
  69
  70         for (i = 0; i < 4; i++) {
  71                 if (j_joystick[i].buffer >= 0) {
  72                         if (j_joystick[i].version) {
  73                                 while (read (j_joystick[i].buffer, &current_event, sizeof (struct js_event)) > 0) {
  74                                         num_processed++;
  75                                         switch (current_event.type & ~JS_EVENT_INIT) {
  76                                                 case JS_EVENT_AXIS:
  77                                                         j_axis[j_axes_in_sticks[i] + current_event.number].value = current_event.value;
  78                                                         break;
  79                                                 case JS_EVENT_BUTTON:
  80                                                         j_button[j_buttons_in_sticks[i] + current_event.number].state = current_event.value;
  81                                                         break;
  82                                         }
  83                                 }
  84                         } else {
  85                                 read (j_joystick[i].buffer, &joy_data, JS_RETURN);
  86                                 j_axis[j_axes_in_sticks[i] + 0].value = joy_data.x;
  87                                 j_axis[j_axes_in_sticks[i] + 1].value = joy_data.y;
  88                                 j_button[j_buttons_in_sticks[i] + 0].state = (joy_data.buttons & 0x01);
  89                                 j_button[j_buttons_in_sticks[i] + 1].state = (joy_data.buttons & 0x02) >> 1;
  90                         }
  91                 }
  92         }
  93
  94         return num_processed;*/
  95                 return 0;
  96 }
  97
  98
  99 void joy_set_cal_vals(int *axis_min, int *axis_center, int *axis_max) {
 100         int i;
 101
 102         for (i = 0; i < 4; i++) {
 103                 j_axis[i].center_val = axis_center[i];
 104                 j_axis[i].min_val = axis_min[i];
 105                 j_axis[i].max_val = axis_max[i];
 106         }
 107 }
 108
 109
 110 void joy_get_cal_vals(int *axis_min, int *axis_center, int *axis_max) {
 111         int i;
 112
 113         //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 :)
 114         for (i = 0; i < 4; i++) {
 115         //end edit -MM
 116                 axis_center[i] = j_axis[i].center_val;
 117                 axis_min[i] = j_axis[i].min_val;
 118                 axis_max[i] = j_axis[i].max_val;
 119         }
 120 }
 121
 122
 123 void joy_set_min (int axis_number, int value) {
 124         j_axis[axis_number].min_val = value;
 125 }
 126
 127
 128 void joy_set_center (int axis_number, int value) {
 129         j_axis[axis_number].center_val = value;
 130 }
 131
 132
 133 void joy_set_max (int axis_number, int value) {
 134         j_axis[axis_number].max_val = value;
 135 }
 136
 137
 138 ubyte joy_get_present_mask () {
 139         return 1;
 140 }
 141
 142
 143 void joy_set_timer_rate (int max_value) {
 144         timer_rate = max_value;
 145 }
 146
 147
 148 int joy_get_timer_rate () {
 149         return timer_rate;
 150 }
 151
 152
 153 void joy_flush () {
 154         int i;
 155
 156         if (!joy_installed) return;
 157
 158         for (i = 0; i < j_num_buttons; i++) {
 159                 j_button[i].timedown = 0;
 160                 j_button[i].downcount = 0;
 161         }
 162
 163 }
 164
 165
 166 ubyte joystick_read_raw_axis (ubyte mask, int *axes) {
 167         int i;
 168
 169         j_Update_state();
 170
 171         for (i = 0; i <= j_num_axes; i++) {
 172                 axes[i] = j_axis[i].value;
 173         }
 174
 175         return 0;
 176 }
 177
 178
 179 /* 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. */
 180
 181
 182 int joy_init () {
 183         int i, j;
 184
 185         if (joy_installed) return 0;
 186         joy_flush ();
 187
 188         if (!joy_installed)     {
 189
 190 //              printf ("Initializing joystick... ");
 191
 192                 j_joystick[0].buffer = open ("/dev/js0", O_NONBLOCK);
 193                 j_joystick[1].buffer = open ("/dev/js1", O_NONBLOCK);
 194                 j_joystick[2].buffer = open ("/dev/js2", O_NONBLOCK);
 195                 j_joystick[3].buffer = open ("/dev/js3", O_NONBLOCK);
 196
 197                 if (j_joystick[0].buffer >= 0 || j_joystick[1].buffer >= 0 || j_joystick[2].buffer >= 0 || j_joystick[3].buffer >= 0) {
 198 //                      printf ("found: ");
 199
 200                         for (i = 0; i < 4; i++) {
 201                                 if (j_joystick[i].buffer >= 0) {
 202                                         /*
 203                                         ioctl (j_joystick[i].buffer, JSIOCGAXES, &j_joystick[i].num_axes);
 204                                         ioctl (j_joystick[i].buffer, JSIOCGBUTTONS, &j_joystick[i].num_buttons);
 205                                         ioctl (j_joystick[i].buffer, JSIOCGVERSION, &j_joystick[i].version);
 206 */
 207                                         if (!j_joystick[i].version) {
 208                                                 j_joystick[i].num_axes = 2;
 209                                                 j_joystick[i].num_buttons = 2;
 210 //                                              printf ("js%d (v0.x)  " , i);
 211                                         } else {
 212 //                                              printf ("js%d (v%d.%d.%d)  ", i, (j_joystick[i].version & 0xff0000) >> 16, (j_joystick[i].version & 0xff00) >> 8, j_joystick[i].version & 0xff);
 213                                         }
 214
 215                                         for (j = j_num_axes; j < (j_num_axes + j_joystick[i].num_axes); j++) {
 216                                                 j_axis[j].joydev = i;
 217                                                 if (j_joystick[i].version) {
 218                                                         j_axis[j].center_val = 0;
 219                                                         j_axis[j].max_val = 32767;
 220                                                         j_axis[j].min_val = -32767;
 221                                                 }
 222                                         }
 223                                         for (j = j_num_buttons; j < (j_num_buttons + j_joystick[i].num_buttons); j++) {
 224                                                 j_button[j].joydev = i;
 225                                         }
 226
 227                                         j_num_axes += j_joystick[i].num_axes;
 228                                         j_num_buttons += j_joystick[i].num_buttons;
 229
 230                                 } else {
 231                                         j_joystick[i].num_buttons = 0;
 232                                         j_joystick[i].num_axes = 0;
 233                                 }
 234
 235                                 for (j = 0; j < i; j++) {
 236                                         j_axes_in_sticks[i] += j_joystick[j].num_axes;
 237                                         j_buttons_in_sticks[i] += j_joystick[j].num_buttons;
 238                                 }
 239                         }
 240                 } else {
 241 //                      printf ("no joysticks found\n");
 242                         return 0;
 243                 }
 244
 245 //              printf ("\n");
 246
 247                 if (j_num_axes > MAX_AXES)
 248                         j_num_axes = MAX_AXES;
 249                 if (j_num_buttons > MAX_BUTTONS)
 250                         j_num_buttons = MAX_BUTTONS;
 251
 252                 joy_present = 1;
 253                 joy_installed = 1;
 254                 return 1;
 255         }
 256
 257         return 1;
 258 }
 259
 260
 261 void joy_close() {
 262         int i;
 263
 264         if (!joy_installed) return;
 265
 266         for (i = 0; i < 4; i++) {
 267                 if (j_joystick[i].buffer>=0) {
 268                         printf ("closing js%d\n", i);
 269                         close (j_joystick[i].buffer);
 270                 }
 271                 j_joystick[i].buffer=-1;
 272         }
 273
 274         joy_present=0;
 275         joy_installed=0;
 276 }
 277
 278
 279 void joy_set_cen() {
 280 }
 281
 282
 283 int joy_get_scaled_reading(int raw, int axis_num)
 284 {
 285  int d, x;
 286
 287   raw -= j_axis[axis_num].center_val;
 288
 289    if (raw < 0)
 290     d = j_axis[axis_num].center_val - j_axis[axis_num].min_val;
 291    else if (raw > 0)
 292     d = j_axis[axis_num].max_val - j_axis[axis_num].center_val;
 293    else
 294     d = 0;
 295
 296    if (d)
 297     x = ((raw << 7) / d);
 298    else
 299     x = 0;
 300
 301    if ( x < -128 )
 302     x = -128;
 303    if ( x > 127 )
 304     x = 127;
 305
 306 //added on 4/13/99 by Victor Rachels to add deadzone control
 307   d =  (joy_deadzone) * 6;
 308    if ((x > (-1*d)) && (x < d))
 309     x = 0;
 310 //end this section addition -VR
 311
 312   return x;
 313 }
 314
 315
 316 void joy_get_pos(int *x, int *y) {
 317         int axis[MAX_AXES];
 318
 319         if ((!joy_installed)||(!joy_present)) { *x=*y=0; return; }
 320
 321         joystick_read_raw_axis (JOY_ALL_AXIS, axis);
 322
 323         *x = joy_get_scaled_reading( axis[0], 0 );
 324         *y = joy_get_scaled_reading( axis[1], 1 );
 325 }
 326
 327
 328 int joy_get_btns () {
 329         return 0;
 330 }
 331
 332
 333 int joy_get_button_state (int btn) {
 334   if(btn >= j_num_buttons)
 335    return 0;
 336         j_Update_state ();
 337
 338         return j_button[btn].state;
 339 }
 340
 341
 342 int joy_get_button_down_cnt (int btn) {
 343         int downcount;
 344
 345         j_Update_state ();
 346
 347         downcount = j_button[btn].downcount;
 348         j_button[btn].downcount = 0;
 349
 350         return downcount;
 351 }
 352
 353
 354 //changed 6/24/99 to finally squish the timedown bug - Owen Evans
 355 fix joy_get_button_down_time(int btn)  {
 356         fix downtime;
 357         j_Update_state ();
 358
 359         if (j_button[btn].state) {
 360                 downtime = timer_get_fixed_seconds() - j_button[btn].timedown;
 361                 j_button[btn].timedown = timer_get_fixed_seconds();
 362         } else {
 363                 downtime = 0;
 364         }
 365
 366         return downtime;
 367 }
 368 //end changed - OE
 369
 370 void joy_poll() {
 371
 372 }
 373
 374
 375 void joy_set_slow_reading(int flag) {
 376
 377 }
 378
 379 #endif // __ENV_LINUX__