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