1 /* 2 * Copyright (c) 1996-2001 Vojtech Pavlik 3 */ 4 5 /* 6 * Analog 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 25 #include <linux/delay.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/slab.h> 29 #include <linux/bitops.h> 30 #include <linux/init.h> 31 #include <linux/input.h> 32 #include <linux/gameport.h> 33 #include <linux/jiffies.h> 34 #include <linux/timex.h> 35 #include <linux/timekeeping.h> 36 37 #define DRIVER_DESC "Analog joystick and gamepad driver" 38 39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40 MODULE_DESCRIPTION(DRIVER_DESC); 41 MODULE_LICENSE("GPL"); 42 43 static bool use_ktime = true; 44 module_param(use_ktime, bool, 0400); 45 MODULE_PARM_DESC(use_ktime, "Use ktime for measuring I/O speed"); 46 47 /* 48 * Option parsing. 49 */ 50 51 #define ANALOG_PORTS 16 52 53 static char *js[ANALOG_PORTS]; 54 static unsigned int js_nargs; 55 static int analog_options[ANALOG_PORTS]; 56 module_param_array_named(map, js, charp, &js_nargs, 0); 57 MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities"); 58 59 /* 60 * Times, feature definitions. 61 */ 62 63 #define ANALOG_RUDDER 0x00004 64 #define ANALOG_THROTTLE 0x00008 65 #define ANALOG_AXES_STD 0x0000f 66 #define ANALOG_BTNS_STD 0x000f0 67 68 #define ANALOG_BTNS_CHF 0x00100 69 #define ANALOG_HAT1_CHF 0x00200 70 #define ANALOG_HAT2_CHF 0x00400 71 #define ANALOG_HAT_FCS 0x00800 72 #define ANALOG_HATS_ALL 0x00e00 73 #define ANALOG_BTN_TL 0x01000 74 #define ANALOG_BTN_TR 0x02000 75 #define ANALOG_BTN_TL2 0x04000 76 #define ANALOG_BTN_TR2 0x08000 77 #define ANALOG_BTNS_TLR 0x03000 78 #define ANALOG_BTNS_TLR2 0x0c000 79 #define ANALOG_BTNS_GAMEPAD 0x0f000 80 81 #define ANALOG_HBTN_CHF 0x10000 82 #define ANALOG_ANY_CHF 0x10700 83 #define ANALOG_SAITEK 0x20000 84 #define ANALOG_EXTENSIONS 0x7ff00 85 #define ANALOG_GAMEPAD 0x80000 86 87 #define ANALOG_MAX_TIME 3 /* 3 ms */ 88 #define ANALOG_LOOP_TIME 2000 /* 2 * loop */ 89 #define ANALOG_SAITEK_DELAY 200 /* 200 us */ 90 #define ANALOG_SAITEK_TIME 2000 /* 2000 us */ 91 #define ANALOG_AXIS_TIME 2 /* 2 * refresh */ 92 #define ANALOG_INIT_RETRIES 8 /* 8 times */ 93 #define ANALOG_FUZZ_BITS 2 /* 2 bit more */ 94 #define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */ 95 96 #define ANALOG_MAX_NAME_LENGTH 128 97 #define ANALOG_MAX_PHYS_LENGTH 32 98 99 static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE }; 100 static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 101 static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR }; 102 static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS }; 103 static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE }; 104 static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, 105 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 }; 106 107 static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 }; 108 109 struct analog { 110 struct input_dev *dev; 111 int mask; 112 short *buttons; 113 char name[ANALOG_MAX_NAME_LENGTH]; 114 char phys[ANALOG_MAX_PHYS_LENGTH]; 115 }; 116 117 struct analog_port { 118 struct gameport *gameport; 119 struct analog analog[2]; 120 unsigned char mask; 121 char saitek; 122 char cooked; 123 int bads; 124 int reads; 125 int speed; 126 int loop; 127 int fuzz; 128 int axes[4]; 129 int buttons; 130 int initial[4]; 131 int axtime; 132 }; 133 134 /* 135 * Time macros. 136 */ 137 138 #ifdef __i386__ 139 140 #include <linux/i8253.h> 141 142 #define GET_TIME(x) do { if (boot_cpu_has(X86_FEATURE_TSC)) x = (unsigned int)rdtsc(); else x = get_time_pit(); } while (0) 143 #define DELTA(x,y) (boot_cpu_has(X86_FEATURE_TSC) ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? PIT_TICK_RATE / HZ : 0))) 144 #define TIME_NAME (boot_cpu_has(X86_FEATURE_TSC)?"TSC":"PIT") 145 static unsigned int get_time_pit(void) 146 { 147 unsigned long flags; 148 unsigned int count; 149 150 raw_spin_lock_irqsave(&i8253_lock, flags); 151 outb_p(0x00, 0x43); 152 count = inb_p(0x40); 153 count |= inb_p(0x40) << 8; 154 raw_spin_unlock_irqrestore(&i8253_lock, flags); 155 156 return count; 157 } 158 #elif defined(__x86_64__) 159 #define GET_TIME(x) do { x = (unsigned int)rdtsc(); } while (0) 160 #define DELTA(x,y) ((y)-(x)) 161 #define TIME_NAME "TSC" 162 #elif defined(__alpha__) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_PPC) || defined(CONFIG_RISCV) 163 #define GET_TIME(x) do { x = get_cycles(); } while (0) 164 #define DELTA(x,y) ((y)-(x)) 165 #define TIME_NAME "get_cycles" 166 #else 167 #define FAKE_TIME 168 static unsigned long analog_faketime = 0; 169 #define GET_TIME(x) do { x = analog_faketime++; } while(0) 170 #define DELTA(x,y) ((y)-(x)) 171 #define TIME_NAME "Unreliable" 172 #warning Precise timer not defined for this architecture. 173 #endif 174 175 static inline u64 get_time(void) 176 { 177 if (use_ktime) { 178 return ktime_get_ns(); 179 } else { 180 unsigned int x; 181 GET_TIME(x); 182 return x; 183 } 184 } 185 186 static inline unsigned int delta(u64 x, u64 y) 187 { 188 if (use_ktime) 189 return y - x; 190 else 191 return DELTA((unsigned int)x, (unsigned int)y); 192 } 193 194 /* 195 * analog_decode() decodes analog joystick data and reports input events. 196 */ 197 198 static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons) 199 { 200 struct input_dev *dev = analog->dev; 201 int i, j; 202 203 if (analog->mask & ANALOG_HAT_FCS) 204 for (i = 0; i < 4; i++) 205 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) { 206 buttons |= 1 << (i + 14); 207 break; 208 } 209 210 for (i = j = 0; i < 6; i++) 211 if (analog->mask & (0x10 << i)) 212 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1); 213 214 if (analog->mask & ANALOG_HBTN_CHF) 215 for (i = 0; i < 4; i++) 216 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1); 217 218 if (analog->mask & ANALOG_BTN_TL) 219 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1)); 220 if (analog->mask & ANALOG_BTN_TR) 221 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1)); 222 if (analog->mask & ANALOG_BTN_TL2) 223 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1))); 224 if (analog->mask & ANALOG_BTN_TR2) 225 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1))); 226 227 for (i = j = 0; i < 4; i++) 228 if (analog->mask & (1 << i)) 229 input_report_abs(dev, analog_axes[j++], axes[i]); 230 231 for (i = j = 0; i < 3; i++) 232 if (analog->mask & analog_exts[i]) { 233 input_report_abs(dev, analog_hats[j++], 234 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1)); 235 input_report_abs(dev, analog_hats[j++], 236 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1)); 237 } 238 239 input_sync(dev); 240 } 241 242 /* 243 * analog_cooked_read() reads analog joystick data. 244 */ 245 246 static int analog_cooked_read(struct analog_port *port) 247 { 248 struct gameport *gameport = port->gameport; 249 u64 time[4], start, loop, now; 250 unsigned int loopout, timeout; 251 unsigned char data[4], this, last; 252 unsigned long flags; 253 int i, j; 254 255 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000; 256 timeout = ANALOG_MAX_TIME * port->speed; 257 258 local_irq_save(flags); 259 gameport_trigger(gameport); 260 now = get_time(); 261 local_irq_restore(flags); 262 263 start = now; 264 this = port->mask; 265 i = 0; 266 267 do { 268 loop = now; 269 last = this; 270 271 local_irq_disable(); 272 this = gameport_read(gameport) & port->mask; 273 now = get_time(); 274 local_irq_restore(flags); 275 276 if ((last ^ this) && (delta(loop, now) < loopout)) { 277 data[i] = last ^ this; 278 time[i] = now; 279 i++; 280 } 281 282 } while (this && (i < 4) && (delta(start, now) < timeout)); 283 284 this <<= 4; 285 286 for (--i; i >= 0; i--) { 287 this |= data[i]; 288 for (j = 0; j < 4; j++) 289 if (data[i] & (1 << j)) 290 port->axes[j] = (delta(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop; 291 } 292 293 return -(this != port->mask); 294 } 295 296 static int analog_button_read(struct analog_port *port, char saitek, char chf) 297 { 298 unsigned char u; 299 int t = 1, i = 0; 300 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME); 301 302 u = gameport_read(port->gameport); 303 304 if (!chf) { 305 port->buttons = (~u >> 4) & 0xf; 306 return 0; 307 } 308 309 port->buttons = 0; 310 311 while ((~u & 0xf0) && (i < 16) && t) { 312 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf]; 313 if (!saitek) return 0; 314 udelay(ANALOG_SAITEK_DELAY); 315 t = strobe; 316 gameport_trigger(port->gameport); 317 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--; 318 i++; 319 } 320 321 return -(!t || (i == 16)); 322 } 323 324 /* 325 * analog_poll() repeatedly polls the Analog joysticks. 326 */ 327 328 static void analog_poll(struct gameport *gameport) 329 { 330 struct analog_port *port = gameport_get_drvdata(gameport); 331 int i; 332 333 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK); 334 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF); 335 336 if (port->cooked) { 337 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons); 338 if (chf) 339 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0; 340 port->reads++; 341 } else { 342 if (!port->axtime--) { 343 port->bads -= analog_cooked_read(port); 344 port->bads -= analog_button_read(port, saitek, chf); 345 port->reads++; 346 port->axtime = ANALOG_AXIS_TIME - 1; 347 } else { 348 if (!saitek) 349 analog_button_read(port, saitek, chf); 350 } 351 } 352 353 for (i = 0; i < 2; i++) 354 if (port->analog[i].mask) 355 analog_decode(port->analog + i, port->axes, port->initial, port->buttons); 356 } 357 358 /* 359 * analog_open() is a callback from the input open routine. 360 */ 361 362 static int analog_open(struct input_dev *dev) 363 { 364 struct analog_port *port = input_get_drvdata(dev); 365 366 gameport_start_polling(port->gameport); 367 return 0; 368 } 369 370 /* 371 * analog_close() is a callback from the input close routine. 372 */ 373 374 static void analog_close(struct input_dev *dev) 375 { 376 struct analog_port *port = input_get_drvdata(dev); 377 378 gameport_stop_polling(port->gameport); 379 } 380 381 /* 382 * analog_calibrate_timer() calibrates the timer and computes loop 383 * and timeout values for a joystick port. 384 */ 385 386 static void analog_calibrate_timer(struct analog_port *port) 387 { 388 struct gameport *gameport = port->gameport; 389 unsigned int i, t, tx; 390 u64 t1, t2, t3; 391 unsigned long flags; 392 393 if (use_ktime) { 394 port->speed = 1000000; 395 } else { 396 local_irq_save(flags); 397 t1 = get_time(); 398 #ifdef FAKE_TIME 399 analog_faketime += 830; 400 #endif 401 mdelay(1); 402 t2 = get_time(); 403 t3 = get_time(); 404 local_irq_restore(flags); 405 406 port->speed = delta(t1, t2) - delta(t2, t3); 407 } 408 409 tx = ~0; 410 411 for (i = 0; i < 50; i++) { 412 local_irq_save(flags); 413 t1 = get_time(); 414 for (t = 0; t < 50; t++) { 415 gameport_read(gameport); 416 t2 = get_time(); 417 } 418 t3 = get_time(); 419 local_irq_restore(flags); 420 udelay(i); 421 t = delta(t1, t2) - delta(t2, t3); 422 if (t < tx) tx = t; 423 } 424 425 port->loop = tx / 50; 426 } 427 428 /* 429 * analog_name() constructs a name for an analog joystick. 430 */ 431 432 static void analog_name(struct analog *analog) 433 { 434 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button", 435 hweight8(analog->mask & ANALOG_AXES_STD), 436 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 + 437 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4); 438 439 if (analog->mask & ANALOG_HATS_ALL) 440 snprintf(analog->name, sizeof(analog->name), "%s %d-hat", 441 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL)); 442 443 if (analog->mask & ANALOG_HAT_FCS) 444 strlcat(analog->name, " FCS", sizeof(analog->name)); 445 if (analog->mask & ANALOG_ANY_CHF) 446 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF", 447 sizeof(analog->name)); 448 449 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick", 450 sizeof(analog->name)); 451 } 452 453 /* 454 * analog_init_device() 455 */ 456 457 static int analog_init_device(struct analog_port *port, struct analog *analog, int index) 458 { 459 struct input_dev *input_dev; 460 int i, j, t, v, w, x, y, z; 461 int error; 462 463 analog_name(analog); 464 snprintf(analog->phys, sizeof(analog->phys), 465 "%s/input%d", port->gameport->phys, index); 466 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn; 467 468 analog->dev = input_dev = input_allocate_device(); 469 if (!input_dev) 470 return -ENOMEM; 471 472 input_dev->name = analog->name; 473 input_dev->phys = analog->phys; 474 input_dev->id.bustype = BUS_GAMEPORT; 475 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG; 476 input_dev->id.product = analog->mask >> 4; 477 input_dev->id.version = 0x0100; 478 input_dev->dev.parent = &port->gameport->dev; 479 480 input_set_drvdata(input_dev, port); 481 482 input_dev->open = analog_open; 483 input_dev->close = analog_close; 484 485 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 486 487 for (i = j = 0; i < 4; i++) 488 if (analog->mask & (1 << i)) { 489 490 t = analog_axes[j]; 491 x = port->axes[i]; 492 y = (port->axes[0] + port->axes[1]) >> 1; 493 z = y - port->axes[i]; 494 z = z > 0 ? z : -z; 495 v = (x >> 3); 496 w = (x >> 3); 497 498 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3))) 499 x = y; 500 501 if (analog->mask & ANALOG_SAITEK) { 502 if (i == 2) x = port->axes[i]; 503 v = x - (x >> 2); 504 w = (x >> 4); 505 } 506 507 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w); 508 j++; 509 } 510 511 for (i = j = 0; i < 3; i++) 512 if (analog->mask & analog_exts[i]) 513 for (x = 0; x < 2; x++) { 514 t = analog_hats[j++]; 515 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 516 } 517 518 for (i = j = 0; i < 4; i++) 519 if (analog->mask & (0x10 << i)) 520 set_bit(analog->buttons[j++], input_dev->keybit); 521 522 if (analog->mask & ANALOG_BTNS_CHF) 523 for (i = 0; i < 2; i++) 524 set_bit(analog->buttons[j++], input_dev->keybit); 525 526 if (analog->mask & ANALOG_HBTN_CHF) 527 for (i = 0; i < 4; i++) 528 set_bit(analog->buttons[j++], input_dev->keybit); 529 530 for (i = 0; i < 4; i++) 531 if (analog->mask & (ANALOG_BTN_TL << i)) 532 set_bit(analog_pads[i], input_dev->keybit); 533 534 analog_decode(analog, port->axes, port->initial, port->buttons); 535 536 error = input_register_device(analog->dev); 537 if (error) { 538 input_free_device(analog->dev); 539 return error; 540 } 541 542 return 0; 543 } 544 545 /* 546 * analog_init_devices() sets up device-specific values and registers the input devices. 547 */ 548 549 static int analog_init_masks(struct analog_port *port) 550 { 551 int i; 552 struct analog *analog = port->analog; 553 int max[4]; 554 555 if (!port->mask) 556 return -1; 557 558 if ((port->mask & 3) != 3 && port->mask != 0xc) { 559 printk(KERN_WARNING "analog.c: Unknown joystick device found " 560 "(data=%#x, %s), probably not analog joystick.\n", 561 port->mask, port->gameport->phys); 562 return -1; 563 } 564 565 566 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */ 567 568 analog[0].mask = i & 0xfffff; 569 570 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD) 571 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS) 572 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2); 573 574 analog[0].mask &= ~(ANALOG_HAT2_CHF) 575 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF); 576 577 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2) 578 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8) 579 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2) 580 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4); 581 582 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER) 583 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10) 584 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12)); 585 586 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000); 587 588 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD 589 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD); 590 591 if (port->cooked) { 592 593 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1; 594 595 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1; 596 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1; 597 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1; 598 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1; 599 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1; 600 601 gameport_calibrate(port->gameport, port->axes, max); 602 } 603 604 for (i = 0; i < 4; i++) 605 port->initial[i] = port->axes[i]; 606 607 return -!(analog[0].mask || analog[1].mask); 608 } 609 610 static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port) 611 { 612 int i, t, u, v; 613 614 port->gameport = gameport; 615 616 gameport_set_drvdata(gameport, port); 617 618 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { 619 620 analog_calibrate_timer(port); 621 622 gameport_trigger(gameport); 623 t = gameport_read(gameport); 624 msleep(ANALOG_MAX_TIME); 625 port->mask = (gameport_read(gameport) ^ t) & t & 0xf; 626 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS; 627 628 for (i = 0; i < ANALOG_INIT_RETRIES; i++) { 629 if (!analog_cooked_read(port)) 630 break; 631 msleep(ANALOG_MAX_TIME); 632 } 633 634 u = v = 0; 635 636 msleep(ANALOG_MAX_TIME); 637 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000); 638 gameport_trigger(gameport); 639 while ((gameport_read(port->gameport) & port->mask) && (u < t)) 640 u++; 641 udelay(ANALOG_SAITEK_DELAY); 642 t = gameport_time(gameport, ANALOG_SAITEK_TIME); 643 gameport_trigger(gameport); 644 while ((gameport_read(port->gameport) & port->mask) && (v < t)) 645 v++; 646 647 if (v < (u >> 1)) { /* FIXME - more than one port */ 648 analog_options[0] |= /* FIXME - more than one port */ 649 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF; 650 return 0; 651 } 652 653 gameport_close(gameport); 654 } 655 656 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { 657 658 for (i = 0; i < ANALOG_INIT_RETRIES; i++) 659 if (!gameport_cooked_read(gameport, port->axes, &port->buttons)) 660 break; 661 for (i = 0; i < 4; i++) 662 if (port->axes[i] != -1) 663 port->mask |= 1 << i; 664 665 port->fuzz = gameport->fuzz; 666 port->cooked = 1; 667 return 0; 668 } 669 670 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 671 } 672 673 static int analog_connect(struct gameport *gameport, struct gameport_driver *drv) 674 { 675 struct analog_port *port; 676 int i; 677 int err; 678 679 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL))) 680 return - ENOMEM; 681 682 err = analog_init_port(gameport, drv, port); 683 if (err) 684 goto fail1; 685 686 err = analog_init_masks(port); 687 if (err) 688 goto fail2; 689 690 gameport_set_poll_handler(gameport, analog_poll); 691 gameport_set_poll_interval(gameport, 10); 692 693 for (i = 0; i < 2; i++) 694 if (port->analog[i].mask) { 695 err = analog_init_device(port, port->analog + i, i); 696 if (err) 697 goto fail3; 698 } 699 700 return 0; 701 702 fail3: while (--i >= 0) 703 if (port->analog[i].mask) 704 input_unregister_device(port->analog[i].dev); 705 fail2: gameport_close(gameport); 706 fail1: gameport_set_drvdata(gameport, NULL); 707 kfree(port); 708 return err; 709 } 710 711 static void analog_disconnect(struct gameport *gameport) 712 { 713 struct analog_port *port = gameport_get_drvdata(gameport); 714 int i; 715 716 for (i = 0; i < 2; i++) 717 if (port->analog[i].mask) 718 input_unregister_device(port->analog[i].dev); 719 gameport_close(gameport); 720 gameport_set_drvdata(gameport, NULL); 721 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n", 722 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0, 723 port->gameport->phys); 724 kfree(port); 725 } 726 727 struct analog_types { 728 char *name; 729 int value; 730 }; 731 732 static struct analog_types analog_types[] = { 733 { "none", 0x00000000 }, 734 { "auto", 0x000000ff }, 735 { "2btn", 0x0000003f }, 736 { "y-joy", 0x0cc00033 }, 737 { "y-pad", 0x8cc80033 }, 738 { "fcs", 0x000008f7 }, 739 { "chf", 0x000002ff }, 740 { "fullchf", 0x000007ff }, 741 { "gamepad", 0x000830f3 }, 742 { "gamepad8", 0x0008f0f3 }, 743 { NULL, 0 } 744 }; 745 746 static void analog_parse_options(void) 747 { 748 int i, j; 749 char *end; 750 751 for (i = 0; i < js_nargs; i++) { 752 753 for (j = 0; analog_types[j].name; j++) 754 if (!strcmp(analog_types[j].name, js[i])) { 755 analog_options[i] = analog_types[j].value; 756 break; 757 } 758 if (analog_types[j].name) continue; 759 760 analog_options[i] = simple_strtoul(js[i], &end, 0); 761 if (end != js[i]) continue; 762 763 analog_options[i] = 0xff; 764 if (!strlen(js[i])) continue; 765 766 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]); 767 } 768 769 for (; i < ANALOG_PORTS; i++) 770 analog_options[i] = 0xff; 771 } 772 773 /* 774 * The gameport device structure. 775 */ 776 777 static struct gameport_driver analog_drv = { 778 .driver = { 779 .name = "analog", 780 }, 781 .description = DRIVER_DESC, 782 .connect = analog_connect, 783 .disconnect = analog_disconnect, 784 }; 785 786 static int __init analog_init(void) 787 { 788 analog_parse_options(); 789 return gameport_register_driver(&analog_drv); 790 } 791 792 static void __exit analog_exit(void) 793 { 794 gameport_unregister_driver(&analog_drv); 795 } 796 797 module_init(analog_init); 798 module_exit(analog_exit); 799