1/* 2 * $Id: analog.c,v 1.1.1.1 2007/08/03 18:52:33 Exp $ 3 * 4 * Copyright (c) 1996-2001 Vojtech Pavlik 5 */ 6 7/* 8 * Analog 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/delay.h> 32#include <linux/kernel.h> 33#include <linux/module.h> 34#include <linux/moduleparam.h> 35#include <linux/slab.h> 36#include <linux/bitops.h> 37#include <linux/init.h> 38#include <linux/input.h> 39#include <linux/gameport.h> 40#include <linux/jiffies.h> 41#include <asm/timex.h> 42 43#define DRIVER_DESC "Analog joystick and gamepad driver" 44 45MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 46MODULE_DESCRIPTION(DRIVER_DESC); 47MODULE_LICENSE("GPL"); 48 49/* 50 * Option parsing. 51 */ 52 53#define ANALOG_PORTS 16 54 55static char *js[ANALOG_PORTS]; 56static unsigned int js_nargs; 57static int analog_options[ANALOG_PORTS]; 58module_param_array_named(map, js, charp, &js_nargs, 0); 59MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities"); 60 61/* 62 * Times, feature definitions. 63 */ 64 65#define ANALOG_RUDDER 0x00004 66#define ANALOG_THROTTLE 0x00008 67#define ANALOG_AXES_STD 0x0000f 68#define ANALOG_BTNS_STD 0x000f0 69 70#define ANALOG_BTNS_CHF 0x00100 71#define ANALOG_HAT1_CHF 0x00200 72#define ANALOG_HAT2_CHF 0x00400 73#define ANALOG_HAT_FCS 0x00800 74#define ANALOG_HATS_ALL 0x00e00 75#define ANALOG_BTN_TL 0x01000 76#define ANALOG_BTN_TR 0x02000 77#define ANALOG_BTN_TL2 0x04000 78#define ANALOG_BTN_TR2 0x08000 79#define ANALOG_BTNS_TLR 0x03000 80#define ANALOG_BTNS_TLR2 0x0c000 81#define ANALOG_BTNS_GAMEPAD 0x0f000 82 83#define ANALOG_HBTN_CHF 0x10000 84#define ANALOG_ANY_CHF 0x10700 85#define ANALOG_SAITEK 0x20000 86#define ANALOG_EXTENSIONS 0x7ff00 87#define ANALOG_GAMEPAD 0x80000 88 89#define ANALOG_MAX_TIME 3 /* 3 ms */ 90#define ANALOG_LOOP_TIME 2000 /* 2 * loop */ 91#define ANALOG_SAITEK_DELAY 200 /* 200 us */ 92#define ANALOG_SAITEK_TIME 2000 /* 2000 us */ 93#define ANALOG_AXIS_TIME 2 /* 2 * refresh */ 94#define ANALOG_INIT_RETRIES 8 /* 8 times */ 95#define ANALOG_FUZZ_BITS 2 /* 2 bit more */ 96#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */ 97 98#define ANALOG_MAX_NAME_LENGTH 128 99#define ANALOG_MAX_PHYS_LENGTH 32 100 101static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE }; 102static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 103static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR }; 104static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS }; 105static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE }; 106static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, 107 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 }; 108 109static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 }; 110 111struct analog { 112 struct input_dev *dev; 113 int mask; 114 short *buttons; 115 char name[ANALOG_MAX_NAME_LENGTH]; 116 char phys[ANALOG_MAX_PHYS_LENGTH]; 117}; 118 119struct analog_port { 120 struct gameport *gameport; 121 struct analog analog[2]; 122 unsigned char mask; 123 char saitek; 124 char cooked; 125 int bads; 126 int reads; 127 int speed; 128 int loop; 129 int fuzz; 130 int axes[4]; 131 int buttons; 132 int initial[4]; 133 int axtime; 134}; 135 136/* 137 * Time macros. 138 */ 139 140#ifdef __i386__ 141 142#include <asm/i8253.h> 143 144#define GET_TIME(x) do { if (cpu_has_tsc) rdtscl(x); else x = get_time_pit(); } while (0) 145#define DELTA(x,y) (cpu_has_tsc ? ((y) - (x)) : ((x) - (y) + ((x) < (y) ? CLOCK_TICK_RATE / HZ : 0))) 146#define TIME_NAME (cpu_has_tsc?"TSC":"PIT") 147static unsigned int get_time_pit(void) 148{ 149 unsigned long flags; 150 unsigned int count; 151 152 spin_lock_irqsave(&i8253_lock, flags); 153 outb_p(0x00, 0x43); 154 count = inb_p(0x40); 155 count |= inb_p(0x40) << 8; 156 spin_unlock_irqrestore(&i8253_lock, flags); 157 158 return count; 159} 160#elif defined(__x86_64__) 161#define GET_TIME(x) rdtscl(x) 162#define DELTA(x,y) ((y)-(x)) 163#define TIME_NAME "TSC" 164#elif defined(__alpha__) 165#define GET_TIME(x) do { x = get_cycles(); } while (0) 166#define DELTA(x,y) ((y)-(x)) 167#define TIME_NAME "PCC" 168#else 169#define FAKE_TIME 170static unsigned long analog_faketime = 0; 171#define GET_TIME(x) do { x = analog_faketime++; } while(0) 172#define DELTA(x,y) ((y)-(x)) 173#define TIME_NAME "Unreliable" 174#warning Precise timer not defined for this architecture. 175#endif 176 177/* 178 * analog_decode() decodes analog joystick data and reports input events. 179 */ 180 181static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons) 182{ 183 struct input_dev *dev = analog->dev; 184 int i, j; 185 186 if (analog->mask & ANALOG_HAT_FCS) 187 for (i = 0; i < 4; i++) 188 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) { 189 buttons |= 1 << (i + 14); 190 break; 191 } 192 193 for (i = j = 0; i < 6; i++) 194 if (analog->mask & (0x10 << i)) 195 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1); 196 197 if (analog->mask & ANALOG_HBTN_CHF) 198 for (i = 0; i < 4; i++) 199 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1); 200 201 if (analog->mask & ANALOG_BTN_TL) 202 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1)); 203 if (analog->mask & ANALOG_BTN_TR) 204 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1)); 205 if (analog->mask & ANALOG_BTN_TL2) 206 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1))); 207 if (analog->mask & ANALOG_BTN_TR2) 208 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1))); 209 210 for (i = j = 0; i < 4; i++) 211 if (analog->mask & (1 << i)) 212 input_report_abs(dev, analog_axes[j++], axes[i]); 213 214 for (i = j = 0; i < 3; i++) 215 if (analog->mask & analog_exts[i]) { 216 input_report_abs(dev, analog_hats[j++], 217 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1)); 218 input_report_abs(dev, analog_hats[j++], 219 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1)); 220 } 221 222 input_sync(dev); 223} 224 225/* 226 * analog_cooked_read() reads analog joystick data. 227 */ 228 229static int analog_cooked_read(struct analog_port *port) 230{ 231 struct gameport *gameport = port->gameport; 232 unsigned int time[4], start, loop, now, loopout, timeout; 233 unsigned char data[4], this, last; 234 unsigned long flags; 235 int i, j; 236 237 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000; 238 timeout = ANALOG_MAX_TIME * port->speed; 239 240 local_irq_save(flags); 241 gameport_trigger(gameport); 242 GET_TIME(now); 243 local_irq_restore(flags); 244 245 start = now; 246 this = port->mask; 247 i = 0; 248 249 do { 250 loop = now; 251 last = this; 252 253 local_irq_disable(); 254 this = gameport_read(gameport) & port->mask; 255 GET_TIME(now); 256 local_irq_restore(flags); 257 258 if ((last ^ this) && (DELTA(loop, now) < loopout)) { 259 data[i] = last ^ this; 260 time[i] = now; 261 i++; 262 } 263 264 } while (this && (i < 4) && (DELTA(start, now) < timeout)); 265 266 this <<= 4; 267 268 for (--i; i >= 0; i--) { 269 this |= data[i]; 270 for (j = 0; j < 4; j++) 271 if (data[i] & (1 << j)) 272 port->axes[j] = (DELTA(start, time[i]) << ANALOG_FUZZ_BITS) / port->loop; 273 } 274 275 return -(this != port->mask); 276} 277 278static int analog_button_read(struct analog_port *port, char saitek, char chf) 279{ 280 unsigned char u; 281 int t = 1, i = 0; 282 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME); 283 284 u = gameport_read(port->gameport); 285 286 if (!chf) { 287 port->buttons = (~u >> 4) & 0xf; 288 return 0; 289 } 290 291 port->buttons = 0; 292 293 while ((~u & 0xf0) && (i < 16) && t) { 294 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf]; 295 if (!saitek) return 0; 296 udelay(ANALOG_SAITEK_DELAY); 297 t = strobe; 298 gameport_trigger(port->gameport); 299 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--; 300 i++; 301 } 302 303 return -(!t || (i == 16)); 304} 305 306/* 307 * analog_poll() repeatedly polls the Analog joysticks. 308 */ 309 310static void analog_poll(struct gameport *gameport) 311{ 312 struct analog_port *port = gameport_get_drvdata(gameport); 313 int i; 314 315 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK); 316 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF); 317 318 if (port->cooked) { 319 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons); 320 if (chf) 321 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0; 322 port->reads++; 323 } else { 324 if (!port->axtime--) { 325 port->bads -= analog_cooked_read(port); 326 port->bads -= analog_button_read(port, saitek, chf); 327 port->reads++; 328 port->axtime = ANALOG_AXIS_TIME - 1; 329 } else { 330 if (!saitek) 331 analog_button_read(port, saitek, chf); 332 } 333 } 334 335 for (i = 0; i < 2; i++) 336 if (port->analog[i].mask) 337 analog_decode(port->analog + i, port->axes, port->initial, port->buttons); 338} 339 340/* 341 * analog_open() is a callback from the input open routine. 342 */ 343 344static int analog_open(struct input_dev *dev) 345{ 346 struct analog_port *port = input_get_drvdata(dev); 347 348 gameport_start_polling(port->gameport); 349 return 0; 350} 351 352/* 353 * analog_close() is a callback from the input close routine. 354 */ 355 356static void analog_close(struct input_dev *dev) 357{ 358 struct analog_port *port = input_get_drvdata(dev); 359 360 gameport_stop_polling(port->gameport); 361} 362 363/* 364 * analog_calibrate_timer() calibrates the timer and computes loop 365 * and timeout values for a joystick port. 366 */ 367 368static void analog_calibrate_timer(struct analog_port *port) 369{ 370 struct gameport *gameport = port->gameport; 371 unsigned int i, t, tx, t1, t2, t3; 372 unsigned long flags; 373 374 local_irq_save(flags); 375 GET_TIME(t1); 376#ifdef FAKE_TIME 377 analog_faketime += 830; 378#endif 379 mdelay(1); 380 GET_TIME(t2); 381 GET_TIME(t3); 382 local_irq_restore(flags); 383 384 port->speed = DELTA(t1, t2) - DELTA(t2, t3); 385 386 tx = ~0; 387 388 for (i = 0; i < 50; i++) { 389 local_irq_save(flags); 390 GET_TIME(t1); 391 for (t = 0; t < 50; t++) { gameport_read(gameport); GET_TIME(t2); } 392 GET_TIME(t3); 393 local_irq_restore(flags); 394 udelay(i); 395 t = DELTA(t1, t2) - DELTA(t2, t3); 396 if (t < tx) tx = t; 397 } 398 399 port->loop = tx / 50; 400} 401 402/* 403 * analog_name() constructs a name for an analog joystick. 404 */ 405 406static void analog_name(struct analog *analog) 407{ 408 snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button", 409 hweight8(analog->mask & ANALOG_AXES_STD), 410 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 + 411 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4); 412 413 if (analog->mask & ANALOG_HATS_ALL) 414 snprintf(analog->name, sizeof(analog->name), "%s %d-hat", 415 analog->name, hweight16(analog->mask & ANALOG_HATS_ALL)); 416 417 if (analog->mask & ANALOG_HAT_FCS) 418 strlcat(analog->name, " FCS", sizeof(analog->name)); 419 if (analog->mask & ANALOG_ANY_CHF) 420 strlcat(analog->name, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF", 421 sizeof(analog->name)); 422 423 strlcat(analog->name, (analog->mask & ANALOG_GAMEPAD) ? " gamepad": " joystick", 424 sizeof(analog->name)); 425} 426 427/* 428 * analog_init_device() 429 */ 430 431static int analog_init_device(struct analog_port *port, struct analog *analog, int index) 432{ 433 struct input_dev *input_dev; 434 int i, j, t, v, w, x, y, z; 435 int error; 436 437 analog_name(analog); 438 snprintf(analog->phys, sizeof(analog->phys), 439 "%s/input%d", port->gameport->phys, index); 440 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn; 441 442 analog->dev = input_dev = input_allocate_device(); 443 if (!input_dev) 444 return -ENOMEM; 445 446 input_dev->name = analog->name; 447 input_dev->phys = analog->phys; 448 input_dev->id.bustype = BUS_GAMEPORT; 449 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG; 450 input_dev->id.product = analog->mask >> 4; 451 input_dev->id.version = 0x0100; 452 input_dev->dev.parent = &port->gameport->dev; 453 454 input_set_drvdata(input_dev, port); 455 456 input_dev->open = analog_open; 457 input_dev->close = analog_close; 458 459 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 460 461 for (i = j = 0; i < 4; i++) 462 if (analog->mask & (1 << i)) { 463 464 t = analog_axes[j]; 465 x = port->axes[i]; 466 y = (port->axes[0] + port->axes[1]) >> 1; 467 z = y - port->axes[i]; 468 z = z > 0 ? z : -z; 469 v = (x >> 3); 470 w = (x >> 3); 471 472 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3))) 473 x = y; 474 475 if (analog->mask & ANALOG_SAITEK) { 476 if (i == 2) x = port->axes[i]; 477 v = x - (x >> 2); 478 w = (x >> 4); 479 } 480 481 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w); 482 j++; 483 } 484 485 for (i = j = 0; i < 3; i++) 486 if (analog->mask & analog_exts[i]) 487 for (x = 0; x < 2; x++) { 488 t = analog_hats[j++]; 489 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 490 } 491 492 for (i = j = 0; i < 4; i++) 493 if (analog->mask & (0x10 << i)) 494 set_bit(analog->buttons[j++], input_dev->keybit); 495 496 if (analog->mask & ANALOG_BTNS_CHF) 497 for (i = 0; i < 2; i++) 498 set_bit(analog->buttons[j++], input_dev->keybit); 499 500 if (analog->mask & ANALOG_HBTN_CHF) 501 for (i = 0; i < 4; i++) 502 set_bit(analog->buttons[j++], input_dev->keybit); 503 504 for (i = 0; i < 4; i++) 505 if (analog->mask & (ANALOG_BTN_TL << i)) 506 set_bit(analog_pads[i], input_dev->keybit); 507 508 analog_decode(analog, port->axes, port->initial, port->buttons); 509 510 error = input_register_device(analog->dev); 511 if (error) { 512 input_free_device(analog->dev); 513 return error; 514 } 515 516 return 0; 517} 518 519/* 520 * analog_init_devices() sets up device-specific values and registers the input devices. 521 */ 522 523static int analog_init_masks(struct analog_port *port) 524{ 525 int i; 526 struct analog *analog = port->analog; 527 int max[4]; 528 529 if (!port->mask) 530 return -1; 531 532 if ((port->mask & 3) != 3 && port->mask != 0xc) { 533 printk(KERN_WARNING "analog.c: Unknown joystick device found " 534 "(data=%#x, %s), probably not analog joystick.\n", 535 port->mask, port->gameport->phys); 536 return -1; 537 } 538 539 540 i = analog_options[0]; 541 542 analog[0].mask = i & 0xfffff; 543 544 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD) 545 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS) 546 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2); 547 548 analog[0].mask &= ~(ANALOG_HAT2_CHF) 549 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF); 550 551 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2) 552 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8) 553 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2) 554 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4); 555 556 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER) 557 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10) 558 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12)); 559 560 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000); 561 562 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD 563 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD); 564 565 if (port->cooked) { 566 567 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1; 568 569 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1; 570 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1; 571 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1; 572 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1; 573 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1; 574 575 gameport_calibrate(port->gameport, port->axes, max); 576 } 577 578 for (i = 0; i < 4; i++) 579 port->initial[i] = port->axes[i]; 580 581 return -!(analog[0].mask || analog[1].mask); 582} 583 584static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port) 585{ 586 int i, t, u, v; 587 588 port->gameport = gameport; 589 590 gameport_set_drvdata(gameport, port); 591 592 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { 593 594 analog_calibrate_timer(port); 595 596 gameport_trigger(gameport); 597 t = gameport_read(gameport); 598 msleep(ANALOG_MAX_TIME); 599 port->mask = (gameport_read(gameport) ^ t) & t & 0xf; 600 port->fuzz = (port->speed * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS; 601 602 for (i = 0; i < ANALOG_INIT_RETRIES; i++) { 603 if (!analog_cooked_read(port)) 604 break; 605 msleep(ANALOG_MAX_TIME); 606 } 607 608 u = v = 0; 609 610 msleep(ANALOG_MAX_TIME); 611 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000); 612 gameport_trigger(gameport); 613 while ((gameport_read(port->gameport) & port->mask) && (u < t)) 614 u++; 615 udelay(ANALOG_SAITEK_DELAY); 616 t = gameport_time(gameport, ANALOG_SAITEK_TIME); 617 gameport_trigger(gameport); 618 while ((gameport_read(port->gameport) & port->mask) && (v < t)) 619 v++; 620 621 if (v < (u >> 1)) { 622 analog_options[0] |= 623 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF; 624 return 0; 625 } 626 627 gameport_close(gameport); 628 } 629 630 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { 631 632 for (i = 0; i < ANALOG_INIT_RETRIES; i++) 633 if (!gameport_cooked_read(gameport, port->axes, &port->buttons)) 634 break; 635 for (i = 0; i < 4; i++) 636 if (port->axes[i] != -1) 637 port->mask |= 1 << i; 638 639 port->fuzz = gameport->fuzz; 640 port->cooked = 1; 641 return 0; 642 } 643 644 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 645} 646 647static int analog_connect(struct gameport *gameport, struct gameport_driver *drv) 648{ 649 struct analog_port *port; 650 int i; 651 int err; 652 653 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL))) 654 return - ENOMEM; 655 656 err = analog_init_port(gameport, drv, port); 657 if (err) 658 goto fail1; 659 660 err = analog_init_masks(port); 661 if (err) 662 goto fail2; 663 664 gameport_set_poll_handler(gameport, analog_poll); 665 gameport_set_poll_interval(gameport, 10); 666 667 for (i = 0; i < 2; i++) 668 if (port->analog[i].mask) { 669 err = analog_init_device(port, port->analog + i, i); 670 if (err) 671 goto fail3; 672 } 673 674 return 0; 675 676 fail3: while (--i >= 0) 677 if (port->analog[i].mask) 678 input_unregister_device(port->analog[i].dev); 679 fail2: gameport_close(gameport); 680 fail1: gameport_set_drvdata(gameport, NULL); 681 kfree(port); 682 return err; 683} 684 685static void analog_disconnect(struct gameport *gameport) 686{ 687 struct analog_port *port = gameport_get_drvdata(gameport); 688 int i; 689 690 for (i = 0; i < 2; i++) 691 if (port->analog[i].mask) 692 input_unregister_device(port->analog[i].dev); 693 gameport_close(gameport); 694 gameport_set_drvdata(gameport, NULL); 695 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n", 696 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0, 697 port->gameport->phys); 698 kfree(port); 699} 700 701struct analog_types { 702 char *name; 703 int value; 704}; 705 706static struct analog_types analog_types[] = { 707 { "none", 0x00000000 }, 708 { "auto", 0x000000ff }, 709 { "2btn", 0x0000003f }, 710 { "y-joy", 0x0cc00033 }, 711 { "y-pad", 0x8cc80033 }, 712 { "fcs", 0x000008f7 }, 713 { "chf", 0x000002ff }, 714 { "fullchf", 0x000007ff }, 715 { "gamepad", 0x000830f3 }, 716 { "gamepad8", 0x0008f0f3 }, 717 { NULL, 0 } 718}; 719 720static void analog_parse_options(void) 721{ 722 int i, j; 723 char *end; 724 725 for (i = 0; i < js_nargs; i++) { 726 727 for (j = 0; analog_types[j].name; j++) 728 if (!strcmp(analog_types[j].name, js[i])) { 729 analog_options[i] = analog_types[j].value; 730 break; 731 } 732 if (analog_types[j].name) continue; 733 734 analog_options[i] = simple_strtoul(js[i], &end, 0); 735 if (end != js[i]) continue; 736 737 analog_options[i] = 0xff; 738 if (!strlen(js[i])) continue; 739 740 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]); 741 } 742 743 for (; i < ANALOG_PORTS; i++) 744 analog_options[i] = 0xff; 745} 746 747/* 748 * The gameport device structure. 749 */ 750 751static struct gameport_driver analog_drv = { 752 .driver = { 753 .name = "analog", 754 }, 755 .description = DRIVER_DESC, 756 .connect = analog_connect, 757 .disconnect = analog_disconnect, 758}; 759 760static int __init analog_init(void) 761{ 762 analog_parse_options(); 763 gameport_register_driver(&analog_drv); 764 765 return 0; 766} 767 768static void __exit analog_exit(void) 769{ 770 gameport_unregister_driver(&analog_drv); 771} 772 773module_init(analog_init); 774module_exit(analog_exit); 775