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 #include <linux/jiffies.h>
  38
  39 #define DRIVER_DESC     "Gravis GrIP protocol joystick driver"
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION(DRIVER_DESC);
  43 MODULE_LICENSE("GPL");
  44
  45 #define GRIP_MODE_GPP           1
  46 #define GRIP_MODE_BD            2
  47 #define GRIP_MODE_XT            3
  48 #define GRIP_MODE_DC            4
  49
  50 #define GRIP_LENGTH_GPP         24
  51 #define GRIP_STROBE_GPP         200     /* 200 us */
  52 #define GRIP_LENGTH_XT          4
  53 #define GRIP_STROBE_XT          64      /* 64 us */
  54 #define GRIP_MAX_CHUNKS_XT      10
  55 #define GRIP_MAX_BITS_XT        30
  56
  57 struct grip {
  58         struct gameport *gameport;
  59         struct input_dev *dev[2];
  60         unsigned char mode[2];
  61         int reads;
  62         int bads;
  63         char phys[2][32];
  64 };
  65
  66 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 };
  67 static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
  68 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 };
  69 static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
  70
  71 static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
  72 static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  73 static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
  74 static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
  75
  76 static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
  77                                 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
  78 static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
  79 static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
  80 static char grip_anx[] = { 0, 0, 3, 5, 5 };
  81 static char grip_cen[] = { 0, 0, 2, 2, 4 };
  82
  83 /*
  84  * grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
  85  */
  86
  87 static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data)
  88 {
  89         unsigned long flags;
  90         unsigned char u, v;
  91         unsigned int t;
  92         int i;
  93
  94         int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
  95
  96         data[0] = 0;
  97         t = strobe;
  98         i = 0;
  99
 100         local_irq_save(flags);
 101
 102         v = gameport_read(gameport) >> shift;
 103
 104         do {
 105                 t--;
 106                 u = v; v = (gameport_read(gameport) >> shift) & 3;
 107                 if (~v & u & 1) {
 108                         data[0] |= (v >> 1) << i++;
 109                         t = strobe;
 110                 }
 111         } while (i < GRIP_LENGTH_GPP && t > 0);
 112
 113         local_irq_restore(flags);
 114
 115         if (i < GRIP_LENGTH_GPP) return -1;
 116
 117         for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
 118                 data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
 119
 120         return -(i == GRIP_LENGTH_GPP);
 121 }
 122
 123 /*
 124  * grip_xt_read_packet() reads a Gravis Xterminator packet.
 125  */
 126
 127 static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
 128 {
 129         unsigned int i, j, buf, crc;
 130         unsigned char u, v, w;
 131         unsigned long flags;
 132         unsigned int t;
 133         char status;
 134
 135         int strobe = gameport_time(gameport, GRIP_STROBE_XT);
 136
 137         data[0] = data[1] = data[2] = data[3] = 0;
 138         status = buf = i = j = 0;
 139         t = strobe;
 140
 141         local_irq_save(flags);
 142
 143         v = w = (gameport_read(gameport) >> shift) & 3;
 144
 145         do {
 146                 t--;
 147                 u = (gameport_read(gameport) >> shift) & 3;
 148
 149                 if (u ^ v) {
 150
 151                         if ((u ^ v) & 1) {
 152                                 buf = (buf << 1) | (u >> 1);
 153                                 t = strobe;
 154                                 i++;
 155                         } else
 156
 157                         if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
 158                                 if (i == 20) {
 159                                         crc = buf ^ (buf >> 7) ^ (buf >> 14);
 160                                         if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
 161                                                 data[buf >> 18] = buf >> 4;
 162                                                 status |= 1 << (buf >> 18);
 163                                         }
 164                                         j++;
 165                                 }
 166                                 t = strobe;
 167                                 buf = 0;
 168                                 i = 0;
 169                         }
 170                         w = v;
 171                         v = u;
 172                 }
 173
 174         } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
 175
 176         local_irq_restore(flags);
 177
 178         return -(status != 0xf);
 179 }
 180
 181 /*
 182  * grip_timer() repeatedly polls the joysticks and generates events.
 183  */
 184
 185 static void grip_poll(struct gameport *gameport)
 186 {
 187         struct grip *grip = gameport_get_drvdata(gameport);
 188         unsigned int data[GRIP_LENGTH_XT];
 189         struct input_dev *dev;
 190         int i, j;
 191
 192         for (i = 0; i < 2; i++) {
 193
 194                 dev = grip->dev[i];
 195                 if (!dev)
 196                         continue;
 197
 198                 grip->reads++;
 199
 200                 switch (grip->mode[i]) {
 201
 202                         case GRIP_MODE_GPP:
 203
 204                                 if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
 205                                         grip->bads++;
 206                                         break;
 207                                 }
 208
 209                                 input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
 210                                 input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
 211
 212                                 for (j = 0; j < 12; j++)
 213                                         if (grip_btn_gpp[j])
 214                                                 input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
 215
 216                                 break;
 217
 218                         case GRIP_MODE_BD:
 219
 220                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 221                                         grip->bads++;
 222                                         break;
 223                                 }
 224
 225                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 226                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 227                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 228
 229                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 230                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 231
 232                                 for (j = 0; j < 5; j++)
 233                                         input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
 234
 235                                 break;
 236
 237                         case GRIP_MODE_XT:
 238
 239                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 240                                         grip->bads++;
 241                                         break;
 242                                 }
 243
 244                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 245                                 input_report_abs(dev, ABS_Y,  63 - ((data[0] >> 8) & 0x3f));
 246                                 input_report_abs(dev, ABS_BRAKE,    (data[1] >> 2) & 0x3f);
 247                                 input_report_abs(dev, ABS_GAS,      (data[1] >> 8) & 0x3f);
 248                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 249
 250                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 251                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 252                                 input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
 253                                 input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
 254
 255                                 for (j = 0; j < 11; j++)
 256                                         input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
 257                                 break;
 258
 259                         case GRIP_MODE_DC:
 260
 261                                 if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
 262                                         grip->bads++;
 263                                         break;
 264                                 }
 265
 266                                 input_report_abs(dev, ABS_X,        (data[0] >> 2) & 0x3f);
 267                                 input_report_abs(dev, ABS_Y,        (data[0] >> 8) & 0x3f);
 268                                 input_report_abs(dev, ABS_RX,       (data[1] >> 2) & 0x3f);
 269                                 input_report_abs(dev, ABS_RY,       (data[1] >> 8) & 0x3f);
 270                                 input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
 271
 272                                 input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2]       & 1));
 273                                 input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
 274
 275                                 for (j = 0; j < 9; j++)
 276                                         input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
 277                                 break;
 278
 279
 280                 }
 281
 282                 input_sync(dev);
 283         }
 284 }
 285
 286 static int grip_open(struct input_dev *dev)
 287 {
 288         struct grip *grip = dev->private;
 289
 290         gameport_start_polling(grip->gameport);
 291         return 0;
 292 }
 293
 294 static void grip_close(struct input_dev *dev)
 295 {
 296         struct grip *grip = dev->private;
 297
 298         gameport_stop_polling(grip->gameport);
 299 }
 300
 301 static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
 302 {
 303         struct grip *grip;
 304         struct input_dev *input_dev;
 305         unsigned int data[GRIP_LENGTH_XT];
 306         int i, j, t;
 307         int err;
 308
 309         if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
 310                 return -ENOMEM;
 311
 312         grip->gameport = gameport;
 313
 314         gameport_set_drvdata(gameport, grip);
 315
 316         err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
 317         if (err)
 318                 goto fail1;
 319
 320         for (i = 0; i < 2; i++) {
 321                 if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
 322                         grip->mode[i] = GRIP_MODE_GPP;
 323                         continue;
 324                 }
 325                 if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
 326                         if (!(data[3] & 7)) {
 327                                 grip->mode[i] = GRIP_MODE_BD;
 328                                 continue;
 329                         }
 330                         if (!(data[2] & 0xf0)) {
 331                                 grip->mode[i] = GRIP_MODE_XT;
 332                                 continue;
 333                         }
 334                         grip->mode[i] = GRIP_MODE_DC;
 335                         continue;
 336                 }
 337         }
 338
 339         if (!grip->mode[0] && !grip->mode[1]) {
 340                 err = -ENODEV;
 341                 goto fail2;
 342         }
 343
 344         gameport_set_poll_handler(gameport, grip_poll);
 345         gameport_set_poll_interval(gameport, 20);
 346
 347         for (i = 0; i < 2; i++) {
 348                 if (!grip->mode[i])
 349                         continue;
 350
 351                 grip->dev[i] = input_dev = input_allocate_device();
 352                 if (!input_dev) {
 353                         err = -ENOMEM;
 354                         goto fail3;
 355                 }
 356
 357                 sprintf(grip->phys[i], "%s/input%d", gameport->phys, i);
 358
 359                 input_dev->name = grip_name[grip->mode[i]];
 360                 input_dev->phys = grip->phys[i];
 361                 input_dev->id.bustype = BUS_GAMEPORT;
 362                 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
 363                 input_dev->id.product = grip->mode[i];
 364                 input_dev->id.version = 0x0100;
 365                 input_dev->cdev.dev = &gameport->dev;
 366                 input_dev->private = grip;
 367
 368                 input_dev->open = grip_open;
 369                 input_dev->close = grip_close;
 370
 371                 input_dev->evbit[0] = BIT(EV_KEY) | BIT(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         gameport_register_driver(&grip_drv);
 430         return 0;
 431 }
 432
 433 static void __exit grip_exit(void)
 434 {
 435         gameport_unregister_driver(&grip_drv);
 436 }
 437
 438 module_init(grip_init);
 439 module_exit(grip_exit);