drivers/input/joystick/grip.c

   1 /*
   2  *  Copyright (c) 1998-2001 Vojtech Pavlik
   3  */
   4
   5 /*
   6  * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/gameport.h>
  34 #include <linux/input.h>
  35 #include <linux/jiffies.h>
  36
  37 #define DRIVER_DESC     "Gravis GrIP protocol joystick driver"
  38
  39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  40 MODULE_DESCRIPTION(DRIVER_DESC);
  41 MODULE_LICENSE("GPL");
  42
  43 #define GRIP_MODE_GPP           1
  44 #define GRIP_MODE_BD            2
  45 #define GRIP_MODE_XT            3
  46 #define GRIP_MODE_DC            4
  47
  48 #define GRIP_LENGTH_GPP         24
  49 #define GRIP_STROBE_GPP         200     /* 200 us */
  50 #define GRIP_LENGTH_XT          4
  51 #define GRIP_STROBE_XT          64      /* 64 us */
  52 #define GRIP_MAX_CHUNKS_XT      10
  53 #define GRIP_MAX_BITS_XT        30
  54
  55 struct grip {
  56         struct gameport *gameport;
  57         struct input_dev *dev[2];
  58         unsigned char mode[2];
  59         int reads;
  60         int bads;
  61         char phys[2][32];
  62 };
  63
  64 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 };
  65 static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
  66 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 };
  67 static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
  68
  69 static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
  70 static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  71 static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
  72 static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  73
  74 static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
  75                                 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
  76 static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
  77 static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
  78 static char grip_anx[] = { 0, 0, 3, 5, 5 };
  79 static char grip_cen[] = { 0, 0, 2, 2, 4 };
  80
  81 /*
  82  * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
  83  */
  84
  85 static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
  86 {
  87         unsigned long flags;
  88         unsigned char u, v;
  89         unsigned int t;
  90         int i;
  91
  92         int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
  93
  94         data[0] = 0;
  95         t = strobe;
  96         i = 0;
  97
  98         local_irq_save(flags);
  99
 100         v = gameport_read(gameport) >> shift;
 101
 102         do {
 103                 t--;
 104                 u = v; v = (gameport_read(gameport) >> shift) & 3;
 105                 if (~v & u & 1) {
 106                         data[0] |= (v >> 1) << i++;
 107                         t = strobe;
 108                 }
 109         } while (i < GRIP_LENGTH_GPP && t > 0);
 110
 111         local_irq_restore(flags);
 112
 113         if (i < GRIP_LENGTH_GPP) return -1;
 114
 115         for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
 116                 data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
 117
 118         return -(i == GRIP_LENGTH_GPP);
 119 }
 120
 121 /*
 122  * grip_xt_read_packet() reads a Gravis Xterminator packet.
 123  */
 124
 125 static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
 126 {
 127         unsigned int i, j, buf, crc;
 128         unsigned char u, v, w;
 129         unsigned long flags;
 130         unsigned int t;
 131         char status;
 132
 133         int strobe = gameport_time(gameport, GRIP_STROBE_XT);
 134
 135         data[0] = data[1] = data[2] = data[3] = 0;
 136         status = buf = i = j = 0;
 137         t = strobe;
 138
 139         local_irq_save(flags);
 140
 141         v = w = (gameport_read(gameport) >> shift) & 3;
 142
 143         do {
 144                 t--;
 145                 u = (gameport_read(gameport) >> shift) & 3;
 146
 147                 if (u ^ v) {
 148
 149                         if ((u ^ v) & 1) {
 150                                 buf = (buf << 1) | (u >> 1);
 151                                 t = strobe;
 152                                 i++;
 153                         } else
 154
 155                         if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
 156                                 if (i == 20) {
 157                                         crc = buf ^ (buf >> 7) ^ (buf >> 14);
 158                                         if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
 159                                                 data[buf >> 18] = buf >> 4;
 160                                                 status |= 1 << (buf >> 18);
 161                                         }
 162                                         j++;
 163                                 }
 164                                 t = strobe;
 165                                 buf = 0;
 166                                 i = 0;
 167                         }
 168                         w = v;
 169                         v = u;
 170                 }
 171
 172         } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
 173
 174         local_irq_restore(flags);
 175
 176         return -(status != 0xf);
 177 }
 178
 179 /*
 180  * grip_timer() repeatedly polls the joysticks and generates events.
 181  */
 182
 183 static void grip_poll(struct gameport *gameport)
 184 {
 185         struct grip *grip = gameport_get_drvdata(gameport);
 186         unsigned int data[GRIP_LENGTH_XT];
 187         struct input_dev *dev;
 188         int i, j;
 189
 190         for (i = 0; i < 2; i++) {
 191
 192                 dev = grip->dev[i];
 193                 if (!dev)
 194                         continue;
 195
 196                 grip->reads++;
 197
 198                 switch (grip->mode[i]) {
 199
 200                         case GRIP_MODE_GPP:
 201
 202                                 if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
 203                                         grip->bads++;
 204                                         break;
 205                                 }
 206
 207                                 input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
 208                                 input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
 209
 210                                 for (j = 0; j < 12; j++)
 211                                         if (grip_btn_gpp[j])
 212                                                 input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
 213
 214                                 break;
 215
 216                         case GRIP_MODE_BD:
 217
 218                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 219                                         grip->bads++;
 220                                         break;
 221                                 }
 222
 223                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 224                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 225                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 226
 227                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 228                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 229
 230                                 for (j = 0; j < 5; j++)
 231                                         input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
 232
 233                                 break;
 234
 235                         case GRIP_MODE_XT:
 236
 237                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 238                                         grip->bads++;
 239                                         break;
 240                                 }
 241
 242                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 243                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 244                                 input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
 245                                 input_report_abs(dev, ABS_GAS,      (data[1] >> 8) & 0x3f);
 246                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 247
 248                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 249                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 250                                 input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
 251                                 input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
 252
 253                                 for (j = 0; j < 11; j++)
 254                                         input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
 255                                 break;
 256
 257                         case GRIP_MODE_DC:
 258
 259                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 260                                         grip->bads++;
 261                                         break;
 262                                 }
 263
 264                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 265                                 input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
 266                                 input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
 267                                 input_report_abs(dev, ABS_RY,       (data[1] >> 8) & 0x3f);
 268                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 269
 270                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 271                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 272
 273                                 for (j = 0; j < 9; j++)
 274                                         input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
 275                                 break;
 276
 277
 278                 }
 279
 280                 input_sync(dev);
 281         }
 282 }
 283
 284 static int grip_open(struct input_dev *dev)
 285 {
 286         struct grip *grip = input_get_drvdata(dev);
 287
 288         gameport_start_polling(grip->gameport);
 289         return 0;
 290 }
 291
 292 static void grip_close(struct input_dev *dev)
 293 {
 294         struct grip *grip = input_get_drvdata(dev);
 295
 296         gameport_stop_polling(grip->gameport);
 297 }
 298
 299 static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
 300 {
 301         struct grip *grip;
 302         struct input_dev *input_dev;
 303         unsigned int data[GRIP_LENGTH_XT];
 304         int i, j, t;
 305         int err;
 306
 307         if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
 308                 return -ENOMEM;
 309
 310         grip->gameport = gameport;
 311
 312         gameport_set_drvdata(gameport, grip);
 313
 314         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 315         if (err)
 316                 goto fail1;
 317
 318         for (i = 0; i < 2; i++) {
 319                 if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
 320                         grip->mode[i] = GRIP_MODE_GPP;
 321                         continue;
 322                 }
 323                 if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
 324                         if (!(data[3] & 7)) {
 325                                 grip->mode[i] = GRIP_MODE_BD;
 326                                 continue;
 327                         }
 328                         if (!(data[2] & 0xf0)) {
 329                                 grip->mode[i] = GRIP_MODE_XT;
 330                                 continue;
 331                         }
 332                         grip->mode[i] = GRIP_MODE_DC;
 333                         continue;
 334                 }
 335         }
 336
 337         if (!grip->mode[0] && !grip->mode[1]) {
 338                 err = -ENODEV;
 339                 goto fail2;
 340         }
 341
 342         gameport_set_poll_handler(gameport, grip_poll);
 343         gameport_set_poll_interval(gameport, 20);
 344
 345         for (i = 0; i < 2; i++) {
 346                 if (!grip->mode[i])
 347                         continue;
 348
 349                 grip->dev[i] = input_dev = input_allocate_device();
 350                 if (!input_dev) {
 351                         err = -ENOMEM;
 352                         goto fail3;
 353                 }
 354
 355                 snprintf(grip->phys[i], sizeof(grip->phys[i]),
 356                          "%s/input%d", gameport->phys, i);
 357
 358                 input_dev->name = grip_name[grip->mode[i]];
 359                 input_dev->phys = grip->phys[i];
 360                 input_dev->id.bustype = BUS_GAMEPORT;
 361                 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
 362                 input_dev->id.product = grip->mode[i];
 363                 input_dev->id.version = 0x0100;
 364                 input_dev->dev.parent = &gameport->dev;
 365
 366                 input_set_drvdata(input_dev, grip);
 367
 368                 input_dev->open = grip_open;
 369                 input_dev->close = grip_close;
 370
 371                 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 372
 373                 for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
 374
 375                         if (j < grip_cen[grip->mode[i]])
 376                                 input_set_abs_params(input_dev, t, 14, 52, 1, 2);
 377                         else if (j < grip_anx[grip->mode[i]])
 378                                 input_set_abs_params(input_dev, t, 3, 57, 1, 0);
 379                         else
 380                                 input_set_abs_params(input_dev, t, -1, 1, 0, 0);
 381                 }
 382
 383                 for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
 384                         if (t > 0)
 385                                 set_bit(t, input_dev->keybit);
 386
 387                 err = input_register_device(grip->dev[i]);
 388                 if (err)
 389                         goto fail4;
 390         }
 391
 392         return 0;
 393
 394  fail4: input_free_device(grip->dev[i]);
 395  fail3: while (--i >= 0)
 396                 if (grip->dev[i])
 397                         input_unregister_device(grip->dev[i]);
 398  fail2: gameport_close(gameport);
 399  fail1: gameport_set_drvdata(gameport, NULL);
 400         kfree(grip);
 401         return err;
 402 }
 403
 404 static void grip_disconnect(struct gameport *gameport)
 405 {
 406         struct grip *grip = gameport_get_drvdata(gameport);
 407         int i;
 408
 409         for (i = 0; i < 2; i++)
 410                 if (grip->dev[i])
 411                         input_unregister_device(grip->dev[i]);
 412         gameport_close(gameport);
 413         gameport_set_drvdata(gameport, NULL);
 414         kfree(grip);
 415 }
 416
 417 static struct gameport_driver grip_drv = {
 418         .driver         = {
 419                 .name   = "grip",
 420                 .owner  = THIS_MODULE,
 421         },
 422         .description    = DRIVER_DESC,
 423         .connect        = grip_connect,
 424         .disconnect     = grip_disconnect,
 425 };
 426
 427 static int __init grip_init(void)
 428 {
 429         return gameport_register_driver(&grip_drv);
 430 }
 431
 432 static void __exit grip_exit(void)
 433 {
 434         gameport_unregister_driver(&grip_drv);
 435 }
 436
 437 module_init(grip_init);
 438 module_exit(grip_exit);