drivers/input/joystick/grip.c

   1 /*
   2  * $Id: grip.c,v 1.21 2002/01/22 20:27:57 vojtech Exp $
   3  *
   4  *  Copyright (c) 1998-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/init.h>
  34 #include <linux/slab.h>
  35 #include <linux/gameport.h>
  36 #include <linux/input.h>
  37
  38 #define DRIVER_DESC     "Gravis GrIP protocol joystick driver"
  39
  40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  41 MODULE_DESCRIPTION(DRIVER_DESC);
  42 MODULE_LICENSE("GPL");
  43
  44 #define GRIP_MODE_GPP           1
  45 #define GRIP_MODE_BD            2
  46 #define GRIP_MODE_XT            3
  47 #define GRIP_MODE_DC            4
  48
  49 #define GRIP_LENGTH_GPP         24
  50 #define GRIP_STROBE_GPP         200     /* 200 us */
  51 #define GRIP_LENGTH_XT          4
  52 #define GRIP_STROBE_XT          64      /* 64 us */
  53 #define GRIP_MAX_CHUNKS_XT      10
  54 #define GRIP_MAX_BITS_XT        30
  55
  56 struct grip {
  57         struct gameport *gameport;
  58         struct input_dev dev[2];
  59         unsigned char mode[2];
  60         int reads;
  61         int bads;
  62         char phys[2][32];
  63 };
  64
  65 static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 };
  66 static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
  67 static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 };
  68 static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
  69
  70 static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
  71 static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  72 static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
  73 static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  74
  75 static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
  76                                 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
  77 static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
  78 static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
  79 static char grip_anx[] = { 0, 0, 3, 5, 5 };
  80 static char grip_cen[] = { 0, 0, 2, 2, 4 };
  81
  82 /*
  83  * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
  84  */
  85
  86 static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
  87 {
  88         unsigned long flags;
  89         unsigned char u, v;
  90         unsigned int t;
  91         int i;
  92
  93         int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
  94
  95         data[0] = 0;
  96         t = strobe;
  97         i = 0;
  98
  99         local_irq_save(flags);
 100
 101         v = gameport_read(gameport) >> shift;
 102
 103         do {
 104                 t--;
 105                 u = v; v = (gameport_read(gameport) >> shift) & 3;
 106                 if (~v & u & 1) {
 107                         data[0] |= (v >> 1) << i++;
 108                         t = strobe;
 109                 }
 110         } while (i < GRIP_LENGTH_GPP && t > 0);
 111
 112         local_irq_restore(flags);
 113
 114         if (i < GRIP_LENGTH_GPP) return -1;
 115
 116         for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
 117                 data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
 118
 119         return -(i == GRIP_LENGTH_GPP);
 120 }
 121
 122 /*
 123  * grip_xt_read_packet() reads a Gravis Xterminator packet.
 124  */
 125
 126 static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
 127 {
 128         unsigned int i, j, buf, crc;
 129         unsigned char u, v, w;
 130         unsigned long flags;
 131         unsigned int t;
 132         char status;
 133
 134         int strobe = gameport_time(gameport, GRIP_STROBE_XT);
 135
 136         data[0] = data[1] = data[2] = data[3] = 0;
 137         status = buf = i = j = 0;
 138         t = strobe;
 139
 140         local_irq_save(flags);
 141
 142         v = w = (gameport_read(gameport) >> shift) & 3;
 143
 144         do {
 145                 t--;
 146                 u = (gameport_read(gameport) >> shift) & 3;
 147
 148                 if (u ^ v) {
 149
 150                         if ((u ^ v) & 1) {
 151                                 buf = (buf << 1) | (u >> 1);
 152                                 t = strobe;
 153                                 i++;
 154                         } else
 155
 156                         if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
 157                                 if (i == 20) {
 158                                         crc = buf ^ (buf >> 7) ^ (buf >> 14);
 159                                         if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
 160                                                 data[buf >> 18] = buf >> 4;
 161                                                 status |= 1 << (buf >> 18);
 162                                         }
 163                                         j++;
 164                                 }
 165                                 t = strobe;
 166                                 buf = 0;
 167                                 i = 0;
 168                         }
 169                         w = v;
 170                         v = u;
 171                 }
 172
 173         } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
 174
 175         local_irq_restore(flags);
 176
 177         return -(status != 0xf);
 178 }
 179
 180 /*
 181  * grip_timer() repeatedly polls the joysticks and generates events.
 182  */
 183
 184 static void grip_poll(struct gameport *gameport)
 185 {
 186         struct grip *grip = gameport_get_drvdata(gameport);
 187         unsigned int data[GRIP_LENGTH_XT];
 188         struct input_dev *dev;
 189         int i, j;
 190
 191         for (i = 0; i < 2; i++) {
 192
 193                 dev = grip->dev + i;
 194                 grip->reads++;
 195
 196                 switch (grip->mode[i]) {
 197
 198                         case GRIP_MODE_GPP:
 199
 200                                 if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
 201                                         grip->bads++;
 202                                         break;
 203                                 }
 204
 205                                 input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
 206                                 input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
 207
 208                                 for (j = 0; j < 12; j++)
 209                                         if (grip_btn_gpp[j])
 210                                                 input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
 211
 212                                 break;
 213
 214                         case GRIP_MODE_BD:
 215
 216                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 217                                         grip->bads++;
 218                                         break;
 219                                 }
 220
 221                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 222                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 223                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 224
 225                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 226                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 227
 228                                 for (j = 0; j < 5; j++)
 229                                         input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
 230
 231                                 break;
 232
 233                         case GRIP_MODE_XT:
 234
 235                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 236                                         grip->bads++;
 237                                         break;
 238                                 }
 239
 240                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 241                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 242                                 input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
 243                                 input_report_abs(dev, ABS_GAS,      (data[1] >> 8) & 0x3f);
 244                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 245
 246                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 247                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 248                                 input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
 249                                 input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
 250
 251                                 for (j = 0; j < 11; j++)
 252                                         input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
 253                                 break;
 254
 255                         case GRIP_MODE_DC:
 256
 257                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 258                                         grip->bads++;
 259                                         break;
 260                                 }
 261
 262                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 263                                 input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
 264                                 input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
 265                                 input_report_abs(dev, ABS_RY,       (data[1] >> 8) & 0x3f);
 266                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 267
 268                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 269                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 270
 271                                 for (j = 0; j < 9; j++)
 272                                         input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
 273                                 break;
 274
 275
 276                 }
 277
 278                 input_sync(dev);
 279         }
 280 }
 281
 282 static int grip_open(struct input_dev *dev)
 283 {
 284         struct grip *grip = dev->private;
 285
 286         gameport_start_polling(grip->gameport);
 287         return 0;
 288 }
 289
 290 static void grip_close(struct input_dev *dev)
 291 {
 292         struct grip *grip = dev->private;
 293
 294         gameport_stop_polling(grip->gameport);
 295 }
 296
 297 static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
 298 {
 299         struct grip *grip;
 300         unsigned int data[GRIP_LENGTH_XT];
 301         int i, j, t;
 302         int err;
 303
 304         if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
 305                 return -ENOMEM;
 306
 307         grip->gameport = gameport;
 308
 309         gameport_set_drvdata(gameport, grip);
 310
 311         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 312         if (err)
 313                 goto fail1;
 314
 315         for (i = 0; i < 2; i++) {
 316                 if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
 317                         grip->mode[i] = GRIP_MODE_GPP;
 318                         continue;
 319                 }
 320                 if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
 321                         if (!(data[3] & 7)) {
 322                                 grip->mode[i] = GRIP_MODE_BD;
 323                                 continue;
 324                         }
 325                         if (!(data[2] & 0xf0)) {
 326                                 grip->mode[i] = GRIP_MODE_XT;
 327                                 continue;
 328                         }
 329                         grip->mode[i] = GRIP_MODE_DC;
 330                         continue;
 331                 }
 332         }
 333
 334         if (!grip->mode[0] && !grip->mode[1]) {
 335                 err = -ENODEV;
 336                 goto fail2;
 337         }
 338
 339         gameport_set_poll_handler(gameport, grip_poll);
 340         gameport_set_poll_interval(gameport, 20);
 341
 342         for (i = 0; i < 2; i++)
 343                 if (grip->mode[i]) {
 344
 345                         sprintf(grip->phys[i], "%s/input%d", gameport->phys, i);
 346
 347                         grip->dev[i].private = grip;
 348
 349                         grip->dev[i].open = grip_open;
 350                         grip->dev[i].close = grip_close;
 351
 352                         grip->dev[i].name = grip_name[grip->mode[i]];
 353                         grip->dev[i].phys = grip->phys[i];
 354                         grip->dev[i].id.bustype = BUS_GAMEPORT;
 355                         grip->dev[i].id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
 356                         grip->dev[i].id.product = grip->mode[i];
 357                         grip->dev[i].id.version = 0x0100;
 358
 359                         grip->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 360
 361                         for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
 362
 363                                 if (j < grip_cen[grip->mode[i]])
 364                                         input_set_abs_params(&grip->dev[i], t, 14, 52, 1, 2);
 365                                 else if (j < grip_anx[grip->mode[i]])
 366                                         input_set_abs_params(&grip->dev[i], t, 3, 57, 1, 0);
 367                                 else
 368                                         input_set_abs_params(&grip->dev[i], t, -1, 1, 0, 0);
 369                         }
 370
 371                         for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
 372                                 if (t > 0)
 373                                         set_bit(t, grip->dev[i].keybit);
 374
 375                         printk(KERN_INFO "input: %s on %s\n",
 376                                 grip_name[grip->mode[i]], gameport->phys);
 377                         input_register_device(grip->dev + i);
 378                 }
 379
 380         return 0;
 381
 382 fail2:  gameport_close(gameport);
 383 fail1:  gameport_set_drvdata(gameport, NULL);
 384         kfree(grip);
 385         return err;
 386 }
 387
 388 static void grip_disconnect(struct gameport *gameport)
 389 {
 390         struct grip *grip = gameport_get_drvdata(gameport);
 391         int i;
 392
 393         for (i = 0; i < 2; i++)
 394                 if (grip->mode[i])
 395                         input_unregister_device(grip->dev + i);
 396         gameport_close(gameport);
 397         gameport_set_drvdata(gameport, NULL);
 398         kfree(grip);
 399 }
 400
 401 static struct gameport_driver grip_drv = {
 402         .driver         = {
 403                 .name   = "grip",
 404         },
 405         .description    = DRIVER_DESC,
 406         .connect        = grip_connect,
 407         .disconnect     = grip_disconnect,
 408 };
 409
 410 static int __init grip_init(void)
 411 {
 412         gameport_register_driver(&grip_drv);
 413         return 0;
 414 }
 415
 416 static void __exit grip_exit(void)
 417 {
 418         gameport_unregister_driver(&grip_drv);
 419 }
 420
 421 module_init(grip_init);
 422 module_exit(grip_exit);