1 /* 2 * Copyright (c) 1998-2005 Vojtech Pavlik 3 */ 4 5 /* 6 * Logitech ADI joystick family 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/delay.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/string.h> 33 #include <linux/slab.h> 34 #include <linux/input.h> 35 #include <linux/gameport.h> 36 #include <linux/init.h> 37 38 #define DRIVER_DESC "Logitech ADI joystick family driver" 39 40 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 41 MODULE_DESCRIPTION(DRIVER_DESC); 42 MODULE_LICENSE("GPL"); 43 44 /* 45 * Times, array sizes, flags, ids. 46 */ 47 48 #define ADI_MAX_START 200 /* Trigger to packet timeout [200us] */ 49 #define ADI_MAX_STROBE 40 /* Single bit timeout [40us] */ 50 #define ADI_INIT_DELAY 10 /* Delay after init packet [10ms] */ 51 #define ADI_DATA_DELAY 4 /* Delay after data packet [4ms] */ 52 53 #define ADI_MAX_LENGTH 256 54 #define ADI_MIN_LENGTH 8 55 #define ADI_MIN_LEN_LENGTH 10 56 #define ADI_MIN_ID_LENGTH 66 57 #define ADI_MAX_NAME_LENGTH 48 58 #define ADI_MAX_CNAME_LENGTH 16 59 #define ADI_MAX_PHYS_LENGTH 64 60 61 #define ADI_FLAG_HAT 0x04 62 #define ADI_FLAG_10BIT 0x08 63 64 #define ADI_ID_TPD 0x01 65 #define ADI_ID_WGP 0x06 66 #define ADI_ID_WGPE 0x08 67 #define ADI_ID_MAX 0x0a 68 69 /* 70 * Names, buttons, axes ... 71 */ 72 73 static char *adi_names[] = { "WingMan Extreme Digital", "ThunderPad Digital", "SideCar", "CyberMan 2", 74 "WingMan Interceptor", "WingMan Formula", "WingMan GamePad", 75 "WingMan Extreme Digital 3D", "WingMan GamePad Extreme", 76 "WingMan GamePad USB", "Unknown Device %#x" }; 77 78 static char adi_wmgpe_abs[] = { ABS_X, ABS_Y, ABS_HAT0X, ABS_HAT0Y }; 79 static char adi_wmi_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 80 static char adi_wmed3d_abs[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RZ, ABS_HAT0X, ABS_HAT0Y }; 81 static char adi_cm2_abs[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ }; 82 static char adi_wmf_abs[] = { ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 83 84 static short adi_wmgpe_key[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }; 85 static short adi_wmi_key[] = { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_EXTRA }; 86 static short adi_wmed3d_key[] = { BTN_TRIGGER, BTN_THUMB, BTN_THUMB2, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2 }; 87 static short adi_cm2_key[] = { BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8 }; 88 89 static char* adi_abs[] = { adi_wmi_abs, adi_wmgpe_abs, adi_wmf_abs, adi_cm2_abs, adi_wmi_abs, adi_wmf_abs, 90 adi_wmgpe_abs, adi_wmed3d_abs, adi_wmgpe_abs, adi_wmgpe_abs, adi_wmi_abs }; 91 92 static short* adi_key[] = { adi_wmi_key, adi_wmgpe_key, adi_cm2_key, adi_cm2_key, adi_wmi_key, adi_cm2_key, 93 adi_wmgpe_key, adi_wmed3d_key, adi_wmgpe_key, adi_wmgpe_key, adi_wmi_key }; 94 95 /* 96 * Hat to axis conversion arrays. 97 */ 98 99 static struct { 100 int x; 101 int y; 102 } adi_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 103 104 /* 105 * Per-port information. 106 */ 107 108 struct adi { 109 struct input_dev dev; 110 int length; 111 int ret; 112 int idx; 113 unsigned char id; 114 char buttons; 115 char axes10; 116 char axes8; 117 signed char pad; 118 char hats; 119 char *abs; 120 short *key; 121 char name[ADI_MAX_NAME_LENGTH]; 122 char cname[ADI_MAX_CNAME_LENGTH]; 123 char phys[ADI_MAX_PHYS_LENGTH]; 124 unsigned char data[ADI_MAX_LENGTH]; 125 }; 126 127 struct adi_port { 128 struct gameport *gameport; 129 struct adi adi[2]; 130 int bad; 131 int reads; 132 }; 133 134 /* 135 * adi_read_packet() reads a Logitech ADI packet. 136 */ 137 138 static void adi_read_packet(struct adi_port *port) 139 { 140 struct adi *adi = port->adi; 141 struct gameport *gameport = port->gameport; 142 unsigned char u, v, w, x, z; 143 int t[2], s[2], i; 144 unsigned long flags; 145 146 for (i = 0; i < 2; i++) { 147 adi[i].ret = -1; 148 t[i] = gameport_time(gameport, ADI_MAX_START); 149 s[i] = 0; 150 } 151 152 local_irq_save(flags); 153 154 gameport_trigger(gameport); 155 v = z = gameport_read(gameport); 156 157 do { 158 u = v; 159 w = u ^ (v = x = gameport_read(gameport)); 160 for (i = 0; i < 2; i++, w >>= 2, x >>= 2) { 161 t[i]--; 162 if ((w & 0x30) && s[i]) { 163 if ((w & 0x30) < 0x30 && adi[i].ret < ADI_MAX_LENGTH && t[i] > 0) { 164 adi[i].data[++adi[i].ret] = w; 165 t[i] = gameport_time(gameport, ADI_MAX_STROBE); 166 } else t[i] = 0; 167 } else if (!(x & 0x30)) s[i] = 1; 168 } 169 } while (t[0] > 0 || t[1] > 0); 170 171 local_irq_restore(flags); 172 173 return; 174 } 175 176 /* 177 * adi_move_bits() detects a possible 2-stream mode, and moves 178 * the bits accordingly. 179 */ 180 181 static void adi_move_bits(struct adi_port *port, int length) 182 { 183 int i; 184 struct adi *adi = port->adi; 185 186 adi[0].idx = adi[1].idx = 0; 187 188 if (adi[0].ret <= 0 || adi[1].ret <= 0) return; 189 if (adi[0].data[0] & 0x20 || ~adi[1].data[0] & 0x20) return; 190 191 for (i = 1; i <= adi[1].ret; i++) 192 adi[0].data[((length - 1) >> 1) + i + 1] = adi[1].data[i]; 193 194 adi[0].ret += adi[1].ret; 195 adi[1].ret = -1; 196 } 197 198 /* 199 * adi_get_bits() gathers bits from the data packet. 200 */ 201 202 static inline int adi_get_bits(struct adi *adi, int count) 203 { 204 int bits = 0; 205 int i; 206 if ((adi->idx += count) > adi->ret) return 0; 207 for (i = 0; i < count; i++) 208 bits |= ((adi->data[adi->idx - i] >> 5) & 1) << i; 209 return bits; 210 } 211 212 /* 213 * adi_decode() decodes Logitech joystick data into input events. 214 */ 215 216 static int adi_decode(struct adi *adi) 217 { 218 struct input_dev *dev = &adi->dev; 219 char *abs = adi->abs; 220 short *key = adi->key; 221 int i, t; 222 223 if (adi->ret < adi->length || adi->id != (adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4))) 224 return -1; 225 226 for (i = 0; i < adi->axes10; i++) 227 input_report_abs(dev, *abs++, adi_get_bits(adi, 10)); 228 229 for (i = 0; i < adi->axes8; i++) 230 input_report_abs(dev, *abs++, adi_get_bits(adi, 8)); 231 232 for (i = 0; i < adi->buttons && i < 63; i++) { 233 if (i == adi->pad) { 234 t = adi_get_bits(adi, 4); 235 input_report_abs(dev, *abs++, ((t >> 2) & 1) - ( t & 1)); 236 input_report_abs(dev, *abs++, ((t >> 1) & 1) - ((t >> 3) & 1)); 237 } 238 input_report_key(dev, *key++, adi_get_bits(adi, 1)); 239 } 240 241 for (i = 0; i < adi->hats; i++) { 242 if ((t = adi_get_bits(adi, 4)) > 8) t = 0; 243 input_report_abs(dev, *abs++, adi_hat_to_axis[t].x); 244 input_report_abs(dev, *abs++, adi_hat_to_axis[t].y); 245 } 246 247 for (i = 63; i < adi->buttons; i++) 248 input_report_key(dev, *key++, adi_get_bits(adi, 1)); 249 250 input_sync(dev); 251 252 return 0; 253 } 254 255 /* 256 * adi_read() reads the data packet and decodes it. 257 */ 258 259 static int adi_read(struct adi_port *port) 260 { 261 int i; 262 int result = 0; 263 264 adi_read_packet(port); 265 adi_move_bits(port, port->adi[0].length); 266 267 for (i = 0; i < 2; i++) 268 if (port->adi[i].length) 269 result |= adi_decode(port->adi + i); 270 271 return result; 272 } 273 274 /* 275 * adi_poll() repeatedly polls the Logitech joysticks. 276 */ 277 278 static void adi_poll(struct gameport *gameport) 279 { 280 struct adi_port *port = gameport_get_drvdata(gameport); 281 282 port->bad -= adi_read(port); 283 port->reads++; 284 } 285 286 /* 287 * adi_open() is a callback from the input open routine. 288 */ 289 290 static int adi_open(struct input_dev *dev) 291 { 292 struct adi_port *port = dev->private; 293 294 gameport_start_polling(port->gameport); 295 return 0; 296 } 297 298 /* 299 * adi_close() is a callback from the input close routine. 300 */ 301 302 static void adi_close(struct input_dev *dev) 303 { 304 struct adi_port *port = dev->private; 305 306 gameport_stop_polling(port->gameport); 307 } 308 309 /* 310 * adi_init_digital() sends a trigger & delay sequence 311 * to reset and initialize a Logitech joystick into digital mode. 312 */ 313 314 static void adi_init_digital(struct gameport *gameport) 315 { 316 int seq[] = { 4, -2, -3, 10, -6, -11, -7, -9, 11, 0 }; 317 int i; 318 319 for (i = 0; seq[i]; i++) { 320 gameport_trigger(gameport); 321 if (seq[i] > 0) msleep(seq[i]); 322 if (seq[i] < 0) { 323 mdelay(-seq[i]); 324 udelay(-seq[i]*14); /* It looks like mdelay() is off by approx 1.4% */ 325 } 326 } 327 } 328 329 static void adi_id_decode(struct adi *adi, struct adi_port *port) 330 { 331 int i, t; 332 333 if (adi->ret < ADI_MIN_ID_LENGTH) /* Minimum ID packet length */ 334 return; 335 336 if (adi->ret < (t = adi_get_bits(adi, 10))) { 337 printk(KERN_WARNING "adi: Short ID packet: reported: %d != read: %d\n", t, adi->ret); 338 return; 339 } 340 341 adi->id = adi_get_bits(adi, 4) | (adi_get_bits(adi, 4) << 4); 342 343 if ((t = adi_get_bits(adi, 4)) & ADI_FLAG_HAT) adi->hats++; 344 345 adi->length = adi_get_bits(adi, 10); 346 347 if (adi->length >= ADI_MAX_LENGTH || adi->length < ADI_MIN_LENGTH) { 348 printk(KERN_WARNING "adi: Bad data packet length (%d).\n", adi->length); 349 adi->length = 0; 350 return; 351 } 352 353 adi->axes8 = adi_get_bits(adi, 4); 354 adi->buttons = adi_get_bits(adi, 6); 355 356 if (adi_get_bits(adi, 6) != 8 && adi->hats) { 357 printk(KERN_WARNING "adi: Other than 8-dir POVs not supported yet.\n"); 358 adi->length = 0; 359 return; 360 } 361 362 adi->buttons += adi_get_bits(adi, 6); 363 adi->hats += adi_get_bits(adi, 4); 364 365 i = adi_get_bits(adi, 4); 366 367 if (t & ADI_FLAG_10BIT) { 368 adi->axes10 = adi->axes8 - i; 369 adi->axes8 = i; 370 } 371 372 t = adi_get_bits(adi, 4); 373 374 for (i = 0; i < t; i++) 375 adi->cname[i] = adi_get_bits(adi, 8); 376 adi->cname[i] = 0; 377 378 t = 8 + adi->buttons + adi->axes10 * 10 + adi->axes8 * 8 + adi->hats * 4; 379 if (adi->length != t && adi->length != t + (t & 1)) { 380 printk(KERN_WARNING "adi: Expected length %d != data length %d\n", t, adi->length); 381 adi->length = 0; 382 return; 383 } 384 385 switch (adi->id) { 386 case ADI_ID_TPD: 387 adi->pad = 4; 388 adi->buttons -= 4; 389 break; 390 case ADI_ID_WGP: 391 adi->pad = 0; 392 adi->buttons -= 4; 393 break; 394 default: 395 adi->pad = -1; 396 break; 397 } 398 } 399 400 static void adi_init_input(struct adi *adi, struct adi_port *port, int half) 401 { 402 int i, t; 403 char buf[ADI_MAX_NAME_LENGTH]; 404 405 if (!adi->length) return; 406 407 init_input_dev(&adi->dev); 408 409 t = adi->id < ADI_ID_MAX ? adi->id : ADI_ID_MAX; 410 411 snprintf(buf, ADI_MAX_PHYS_LENGTH, adi_names[t], adi->id); 412 snprintf(adi->name, ADI_MAX_NAME_LENGTH, "Logitech %s", buf); 413 snprintf(adi->phys, ADI_MAX_PHYS_LENGTH, "%s/input%d", port->gameport->phys, half); 414 415 adi->abs = adi_abs[t]; 416 adi->key = adi_key[t]; 417 418 adi->dev.open = adi_open; 419 adi->dev.close = adi_close; 420 421 adi->dev.name = adi->name; 422 adi->dev.phys = adi->phys; 423 adi->dev.id.bustype = BUS_GAMEPORT; 424 adi->dev.id.vendor = GAMEPORT_ID_VENDOR_LOGITECH; 425 adi->dev.id.product = adi->id; 426 adi->dev.id.version = 0x0100; 427 428 adi->dev.private = port; 429 adi->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 430 431 for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) 432 set_bit(adi->abs[i], adi->dev.absbit); 433 434 for (i = 0; i < adi->buttons; i++) 435 set_bit(adi->key[i], adi->dev.keybit); 436 } 437 438 static void adi_init_center(struct adi *adi) 439 { 440 int i, t, x; 441 442 if (!adi->length) 443 return; 444 445 for (i = 0; i < adi->axes10 + adi->axes8 + (adi->hats + (adi->pad != -1)) * 2; i++) { 446 447 t = adi->abs[i]; 448 x = adi->dev.abs[t]; 449 450 if (t == ABS_THROTTLE || t == ABS_RUDDER || adi->id == ADI_ID_WGPE) 451 x = i < adi->axes10 ? 512 : 128; 452 453 if (i < adi->axes10) 454 input_set_abs_params(&adi->dev, t, 64, x * 2 - 64, 2, 16); 455 else if (i < adi->axes10 + adi->axes8) 456 input_set_abs_params(&adi->dev, t, 48, x * 2 - 48, 1, 16); 457 else 458 input_set_abs_params(&adi->dev, t, -1, 1, 0, 0); 459 } 460 } 461 462 /* 463 * adi_connect() probes for Logitech ADI joysticks. 464 */ 465 466 static int adi_connect(struct gameport *gameport, struct gameport_driver *drv) 467 { 468 struct adi_port *port; 469 int i; 470 int err; 471 472 if (!(port = kcalloc(1, sizeof(struct adi_port), GFP_KERNEL))) 473 return -ENOMEM; 474 475 port->gameport = gameport; 476 477 gameport_set_drvdata(gameport, port); 478 479 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 480 if (err) { 481 kfree(port); 482 return err; 483 } 484 485 adi_init_digital(gameport); 486 adi_read_packet(port); 487 488 if (port->adi[0].ret >= ADI_MIN_LEN_LENGTH) 489 adi_move_bits(port, adi_get_bits(port->adi, 10)); 490 491 for (i = 0; i < 2; i++) { 492 adi_id_decode(port->adi + i, port); 493 adi_init_input(port->adi + i, port, i); 494 } 495 496 if (!port->adi[0].length && !port->adi[1].length) { 497 gameport_close(gameport); 498 kfree(port); 499 return -ENODEV; 500 } 501 502 gameport_set_poll_handler(gameport, adi_poll); 503 gameport_set_poll_interval(gameport, 20); 504 505 msleep(ADI_INIT_DELAY); 506 if (adi_read(port)) { 507 msleep(ADI_DATA_DELAY); 508 adi_read(port); 509 } 510 511 for (i = 0; i < 2; i++) 512 if (port->adi[i].length > 0) { 513 adi_init_center(port->adi + i); 514 input_register_device(&port->adi[i].dev); 515 printk(KERN_INFO "input: %s [%s] on %s\n", 516 port->adi[i].name, port->adi[i].cname, gameport->phys); 517 } 518 519 return 0; 520 } 521 522 static void adi_disconnect(struct gameport *gameport) 523 { 524 int i; 525 struct adi_port *port = gameport_get_drvdata(gameport); 526 527 for (i = 0; i < 2; i++) 528 if (port->adi[i].length > 0) 529 input_unregister_device(&port->adi[i].dev); 530 gameport_close(gameport); 531 gameport_set_drvdata(gameport, NULL); 532 kfree(port); 533 } 534 535 /* 536 * The gameport device structure. 537 */ 538 539 static struct gameport_driver adi_drv = { 540 .driver = { 541 .name = "adi", 542 }, 543 .description = DRIVER_DESC, 544 .connect = adi_connect, 545 .disconnect = adi_disconnect, 546 }; 547 548 static int __init adi_init(void) 549 { 550 gameport_register_driver(&adi_drv); 551 return 0; 552 } 553 554 static void __exit adi_exit(void) 555 { 556 gameport_unregister_driver(&adi_drv); 557 } 558 559 module_init(adi_init); 560 module_exit(adi_exit); 561