grip.c revision 7b19ada2ed3c1eccb9fe94d74b05e1428224663d
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 41MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 42MODULE_DESCRIPTION(DRIVER_DESC); 43MODULE_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 57struct 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 66static 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 }; 67static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 }; 68static 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 }; 69static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 }; 70 71static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 }; 72static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; 73static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 }; 74static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; 75 76static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital", 77 "Gravis Xterminator Digital", "Gravis Xterminator DualControl" }; 78static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc }; 79static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc }; 80static char grip_anx[] = { 0, 0, 3, 5, 5 }; 81static char grip_cen[] = { 0, 0, 2, 2, 4 }; 82 83/* 84 * grip_gpp_read_packet() reads a Gravis GamePad Pro packet. 85 */ 86 87static 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 127static 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 185static 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 286static int grip_open(struct input_dev *dev) 287{ 288 struct grip *grip = input_get_drvdata(dev); 289 290 gameport_start_polling(grip->gameport); 291 return 0; 292} 293 294static void grip_close(struct input_dev *dev) 295{ 296 struct grip *grip = input_get_drvdata(dev); 297 298 gameport_stop_polling(grip->gameport); 299} 300 301static 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 snprintf(grip->phys[i], sizeof(grip->phys[i]), 358 "%s/input%d", gameport->phys, i); 359 360 input_dev->name = grip_name[grip->mode[i]]; 361 input_dev->phys = grip->phys[i]; 362 input_dev->id.bustype = BUS_GAMEPORT; 363 input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS; 364 input_dev->id.product = grip->mode[i]; 365 input_dev->id.version = 0x0100; 366 input_dev->dev.parent = &gameport->dev; 367 368 input_set_drvdata(input_dev, grip); 369 370 input_dev->open = grip_open; 371 input_dev->close = grip_close; 372 373 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 374 375 for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) { 376 377 if (j < grip_cen[grip->mode[i]]) 378 input_set_abs_params(input_dev, t, 14, 52, 1, 2); 379 else if (j < grip_anx[grip->mode[i]]) 380 input_set_abs_params(input_dev, t, 3, 57, 1, 0); 381 else 382 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 383 } 384 385 for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++) 386 if (t > 0) 387 set_bit(t, input_dev->keybit); 388 389 err = input_register_device(grip->dev[i]); 390 if (err) 391 goto fail4; 392 } 393 394 return 0; 395 396 fail4: input_free_device(grip->dev[i]); 397 fail3: while (--i >= 0) 398 if (grip->dev[i]) 399 input_unregister_device(grip->dev[i]); 400 fail2: gameport_close(gameport); 401 fail1: gameport_set_drvdata(gameport, NULL); 402 kfree(grip); 403 return err; 404} 405 406static void grip_disconnect(struct gameport *gameport) 407{ 408 struct grip *grip = gameport_get_drvdata(gameport); 409 int i; 410 411 for (i = 0; i < 2; i++) 412 if (grip->dev[i]) 413 input_unregister_device(grip->dev[i]); 414 gameport_close(gameport); 415 gameport_set_drvdata(gameport, NULL); 416 kfree(grip); 417} 418 419static struct gameport_driver grip_drv = { 420 .driver = { 421 .name = "grip", 422 .owner = THIS_MODULE, 423 }, 424 .description = DRIVER_DESC, 425 .connect = grip_connect, 426 .disconnect = grip_disconnect, 427}; 428 429static int __init grip_init(void) 430{ 431 gameport_register_driver(&grip_drv); 432 return 0; 433} 434 435static void __exit grip_exit(void) 436{ 437 gameport_unregister_driver(&grip_drv); 438} 439 440module_init(grip_init); 441module_exit(grip_exit); 442