1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (c) 1996-2001 Vojtech Pavlik 4 */ 5 6/* 7 * Analog joystick and gamepad driver for Linux 8 */ 9 10#include <linux/delay.h> 11#include <linux/kernel.h> 12#include <linux/module.h> 13#include <linux/slab.h> 14#include <linux/bitops.h> 15#include <linux/init.h> 16#include <linux/input.h> 17#include <linux/gameport.h> 18#include <linux/jiffies.h> 19#include <linux/seq_buf.h> 20#include <linux/timex.h> 21#include <linux/timekeeping.h> 22 23#define DRIVER_DESC "Analog joystick and gamepad driver" 24 25MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 26MODULE_DESCRIPTION(DRIVER_DESC); 27MODULE_LICENSE("GPL"); 28 29/* 30 * Option parsing. 31 */ 32 33#define ANALOG_PORTS 16 34 35static char *js[ANALOG_PORTS]; 36static unsigned int js_nargs; 37static int analog_options[ANALOG_PORTS]; 38module_param_array_named(map, js, charp, &js_nargs, 0); 39MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities"); 40 41/* 42 * Times, feature definitions. 43 */ 44 45#define ANALOG_RUDDER 0x00004 46#define ANALOG_THROTTLE 0x00008 47#define ANALOG_AXES_STD 0x0000f 48#define ANALOG_BTNS_STD 0x000f0 49 50#define ANALOG_BTNS_CHF 0x00100 51#define ANALOG_HAT1_CHF 0x00200 52#define ANALOG_HAT2_CHF 0x00400 53#define ANALOG_HAT_FCS 0x00800 54#define ANALOG_HATS_ALL 0x00e00 55#define ANALOG_BTN_TL 0x01000 56#define ANALOG_BTN_TR 0x02000 57#define ANALOG_BTN_TL2 0x04000 58#define ANALOG_BTN_TR2 0x08000 59#define ANALOG_BTNS_TLR 0x03000 60#define ANALOG_BTNS_TLR2 0x0c000 61#define ANALOG_BTNS_GAMEPAD 0x0f000 62 63#define ANALOG_HBTN_CHF 0x10000 64#define ANALOG_ANY_CHF 0x10700 65#define ANALOG_SAITEK 0x20000 66#define ANALOG_EXTENSIONS 0x7ff00 67#define ANALOG_GAMEPAD 0x80000 68 69#define ANALOG_MAX_TIME 3 /* 3 ms */ 70#define ANALOG_LOOP_TIME 2000 /* 2 * loop */ 71#define ANALOG_SAITEK_DELAY 200 /* 200 us */ 72#define ANALOG_SAITEK_TIME 2000 /* 2000 us */ 73#define ANALOG_AXIS_TIME 2 /* 2 * refresh */ 74#define ANALOG_INIT_RETRIES 8 /* 8 times */ 75#define ANALOG_FUZZ_BITS 2 /* 2 bit more */ 76#define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */ 77 78#define ANALOG_MAX_NAME_LENGTH 128 79#define ANALOG_MAX_PHYS_LENGTH 32 80 81static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE }; 82static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 83static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR }; 84static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS }; 85static short analog_pad_btn[] = { BTN_A, BTN_B, BTN_C, BTN_X, BTN_TL2, BTN_TR2, BTN_SELECT, BTN_START, BTN_MODE, BTN_BASE }; 86static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, 87 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 }; 88 89static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 }; 90 91struct analog { 92 struct input_dev *dev; 93 int mask; 94 short *buttons; 95 char name[ANALOG_MAX_NAME_LENGTH]; 96 char phys[ANALOG_MAX_PHYS_LENGTH]; 97}; 98 99struct analog_port { 100 struct gameport *gameport; 101 struct analog analog[2]; 102 unsigned char mask; 103 char saitek; 104 char cooked; 105 int bads; 106 int reads; 107 int loop; 108 int fuzz; 109 int axes[4]; 110 int buttons; 111 int initial[4]; 112 int axtime; 113}; 114 115/* 116 * analog_decode() decodes analog joystick data and reports input events. 117 */ 118 119static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons) 120{ 121 struct input_dev *dev = analog->dev; 122 int i, j; 123 124 if (analog->mask & ANALOG_HAT_FCS) 125 for (i = 0; i < 4; i++) 126 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) { 127 buttons |= 1 << (i + 14); 128 break; 129 } 130 131 for (i = j = 0; i < 6; i++) 132 if (analog->mask & (0x10 << i)) 133 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1); 134 135 if (analog->mask & ANALOG_HBTN_CHF) 136 for (i = 0; i < 4; i++) 137 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1); 138 139 if (analog->mask & ANALOG_BTN_TL) 140 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1)); 141 if (analog->mask & ANALOG_BTN_TR) 142 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1)); 143 if (analog->mask & ANALOG_BTN_TL2) 144 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1))); 145 if (analog->mask & ANALOG_BTN_TR2) 146 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1))); 147 148 for (i = j = 0; i < 4; i++) 149 if (analog->mask & (1 << i)) 150 input_report_abs(dev, analog_axes[j++], axes[i]); 151 152 for (i = j = 0; i < 3; i++) 153 if (analog->mask & analog_exts[i]) { 154 input_report_abs(dev, analog_hats[j++], 155 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1)); 156 input_report_abs(dev, analog_hats[j++], 157 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1)); 158 } 159 160 input_sync(dev); 161} 162 163/* 164 * analog_cooked_read() reads analog joystick data. 165 */ 166 167static int analog_cooked_read(struct analog_port *port) 168{ 169 struct gameport *gameport = port->gameport; 170 ktime_t time[4], start, loop, now; 171 unsigned int loopout, timeout; 172 unsigned char data[4], this, last; 173 unsigned long flags; 174 int i, j; 175 176 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000; 177 timeout = ANALOG_MAX_TIME * NSEC_PER_MSEC; 178 179 local_irq_save(flags); 180 gameport_trigger(gameport); 181 now = ktime_get(); 182 local_irq_restore(flags); 183 184 start = now; 185 this = port->mask; 186 i = 0; 187 188 do { 189 loop = now; 190 last = this; 191 192 local_irq_disable(); 193 this = gameport_read(gameport) & port->mask; 194 now = ktime_get(); 195 local_irq_restore(flags); 196 197 if ((last ^ this) && (ktime_sub(now, loop) < loopout)) { 198 data[i] = last ^ this; 199 time[i] = now; 200 i++; 201 } 202 203 } while (this && (i < 4) && (ktime_sub(now, start) < timeout)); 204 205 this <<= 4; 206 207 for (--i; i >= 0; i--) { 208 this |= data[i]; 209 for (j = 0; j < 4; j++) 210 if (data[i] & (1 << j)) 211 port->axes[j] = ((u32)ktime_sub(time[i], start) << ANALOG_FUZZ_BITS) / port->loop; 212 } 213 214 return -(this != port->mask); 215} 216 217static int analog_button_read(struct analog_port *port, char saitek, char chf) 218{ 219 unsigned char u; 220 int t = 1, i = 0; 221 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME); 222 223 u = gameport_read(port->gameport); 224 225 if (!chf) { 226 port->buttons = (~u >> 4) & 0xf; 227 return 0; 228 } 229 230 port->buttons = 0; 231 232 while ((~u & 0xf0) && (i < 16) && t) { 233 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf]; 234 if (!saitek) return 0; 235 udelay(ANALOG_SAITEK_DELAY); 236 t = strobe; 237 gameport_trigger(port->gameport); 238 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--; 239 i++; 240 } 241 242 return -(!t || (i == 16)); 243} 244 245/* 246 * analog_poll() repeatedly polls the Analog joysticks. 247 */ 248 249static void analog_poll(struct gameport *gameport) 250{ 251 struct analog_port *port = gameport_get_drvdata(gameport); 252 int i; 253 254 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK); 255 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF); 256 257 if (port->cooked) { 258 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons); 259 if (chf) 260 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0; 261 port->reads++; 262 } else { 263 if (!port->axtime--) { 264 port->bads -= analog_cooked_read(port); 265 port->bads -= analog_button_read(port, saitek, chf); 266 port->reads++; 267 port->axtime = ANALOG_AXIS_TIME - 1; 268 } else { 269 if (!saitek) 270 analog_button_read(port, saitek, chf); 271 } 272 } 273 274 for (i = 0; i < 2; i++) 275 if (port->analog[i].mask) 276 analog_decode(port->analog + i, port->axes, port->initial, port->buttons); 277} 278 279/* 280 * analog_open() is a callback from the input open routine. 281 */ 282 283static int analog_open(struct input_dev *dev) 284{ 285 struct analog_port *port = input_get_drvdata(dev); 286 287 gameport_start_polling(port->gameport); 288 return 0; 289} 290 291/* 292 * analog_close() is a callback from the input close routine. 293 */ 294 295static void analog_close(struct input_dev *dev) 296{ 297 struct analog_port *port = input_get_drvdata(dev); 298 299 gameport_stop_polling(port->gameport); 300} 301 302/* 303 * analog_calibrate_timer() calibrates the timer and computes loop 304 * and timeout values for a joystick port. 305 */ 306 307static void analog_calibrate_timer(struct analog_port *port) 308{ 309 struct gameport *gameport = port->gameport; 310 unsigned int i, t, tx; 311 ktime_t t1, t2, t3; 312 unsigned long flags; 313 314 tx = ~0; 315 316 for (i = 0; i < 50; i++) { 317 local_irq_save(flags); 318 t1 = ktime_get(); 319 for (t = 0; t < 50; t++) { 320 gameport_read(gameport); 321 t2 = ktime_get(); 322 } 323 t3 = ktime_get(); 324 local_irq_restore(flags); 325 udelay(i); 326 t = ktime_sub(t2, t1) - ktime_sub(t3, t2); 327 if (t < tx) tx = t; 328 } 329 330 port->loop = tx / 50; 331} 332 333/* 334 * analog_name() constructs a name for an analog joystick. 335 */ 336 337static void analog_name(struct analog *analog) 338{ 339 struct seq_buf s; 340 341 seq_buf_init(&s, analog->name, sizeof(analog->name)); 342 seq_buf_printf(&s, "Analog %d-axis %d-button", 343 hweight8(analog->mask & ANALOG_AXES_STD), 344 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 + 345 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4); 346 347 if (analog->mask & ANALOG_HATS_ALL) 348 seq_buf_printf(&s, " %d-hat", 349 hweight16(analog->mask & ANALOG_HATS_ALL)); 350 351 if (analog->mask & ANALOG_HAT_FCS) 352 seq_buf_printf(&s, " FCS"); 353 if (analog->mask & ANALOG_ANY_CHF) 354 seq_buf_printf(&s, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF"); 355 356 seq_buf_printf(&s, (analog->mask & ANALOG_GAMEPAD) ? " gamepad" : " joystick"); 357} 358 359/* 360 * analog_init_device() 361 */ 362 363static int analog_init_device(struct analog_port *port, struct analog *analog, int index) 364{ 365 struct input_dev *input_dev; 366 int i, j, t, v, w, x, y, z; 367 int error; 368 369 analog_name(analog); 370 snprintf(analog->phys, sizeof(analog->phys), 371 "%s/input%d", port->gameport->phys, index); 372 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn; 373 374 analog->dev = input_dev = input_allocate_device(); 375 if (!input_dev) 376 return -ENOMEM; 377 378 input_dev->name = analog->name; 379 input_dev->phys = analog->phys; 380 input_dev->id.bustype = BUS_GAMEPORT; 381 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG; 382 input_dev->id.product = analog->mask >> 4; 383 input_dev->id.version = 0x0100; 384 input_dev->dev.parent = &port->gameport->dev; 385 386 input_set_drvdata(input_dev, port); 387 388 input_dev->open = analog_open; 389 input_dev->close = analog_close; 390 391 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 392 393 for (i = j = 0; i < 4; i++) 394 if (analog->mask & (1 << i)) { 395 396 t = analog_axes[j]; 397 x = port->axes[i]; 398 y = (port->axes[0] + port->axes[1]) >> 1; 399 z = y - port->axes[i]; 400 z = z > 0 ? z : -z; 401 v = (x >> 3); 402 w = (x >> 3); 403 404 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3))) 405 x = y; 406 407 if (analog->mask & ANALOG_SAITEK) { 408 if (i == 2) x = port->axes[i]; 409 v = x - (x >> 2); 410 w = (x >> 4); 411 } 412 413 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w); 414 j++; 415 } 416 417 for (i = j = 0; i < 3; i++) 418 if (analog->mask & analog_exts[i]) 419 for (x = 0; x < 2; x++) { 420 t = analog_hats[j++]; 421 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 422 } 423 424 for (i = j = 0; i < 4; i++) 425 if (analog->mask & (0x10 << i)) 426 set_bit(analog->buttons[j++], input_dev->keybit); 427 428 if (analog->mask & ANALOG_BTNS_CHF) 429 for (i = 0; i < 2; i++) 430 set_bit(analog->buttons[j++], input_dev->keybit); 431 432 if (analog->mask & ANALOG_HBTN_CHF) 433 for (i = 0; i < 4; i++) 434 set_bit(analog->buttons[j++], input_dev->keybit); 435 436 for (i = 0; i < 4; i++) 437 if (analog->mask & (ANALOG_BTN_TL << i)) 438 set_bit(analog_pads[i], input_dev->keybit); 439 440 analog_decode(analog, port->axes, port->initial, port->buttons); 441 442 error = input_register_device(analog->dev); 443 if (error) { 444 input_free_device(analog->dev); 445 return error; 446 } 447 448 return 0; 449} 450 451/* 452 * analog_init_devices() sets up device-specific values and registers the input devices. 453 */ 454 455static int analog_init_masks(struct analog_port *port) 456{ 457 int i; 458 struct analog *analog = port->analog; 459 int max[4]; 460 461 if (!port->mask) 462 return -1; 463 464 if ((port->mask & 3) != 3 && port->mask != 0xc) { 465 printk(KERN_WARNING "analog.c: Unknown joystick device found " 466 "(data=%#x, %s), probably not analog joystick.\n", 467 port->mask, port->gameport->phys); 468 return -1; 469 } 470 471 472 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */ 473 474 analog[0].mask = i & 0xfffff; 475 476 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD) 477 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS) 478 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2); 479 480 analog[0].mask &= ~(ANALOG_HAT2_CHF) 481 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF); 482 483 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2) 484 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8) 485 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2) 486 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4); 487 488 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER) 489 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10) 490 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12)); 491 492 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000); 493 494 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD 495 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD); 496 497 if (port->cooked) { 498 499 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1; 500 501 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1; 502 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1; 503 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1; 504 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1; 505 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1; 506 507 gameport_calibrate(port->gameport, port->axes, max); 508 } 509 510 for (i = 0; i < 4; i++) 511 port->initial[i] = port->axes[i]; 512 513 return -!(analog[0].mask || analog[1].mask); 514} 515 516static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port) 517{ 518 int i, t, u, v; 519 520 port->gameport = gameport; 521 522 gameport_set_drvdata(gameport, port); 523 524 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { 525 526 analog_calibrate_timer(port); 527 528 gameport_trigger(gameport); 529 t = gameport_read(gameport); 530 msleep(ANALOG_MAX_TIME); 531 port->mask = (gameport_read(gameport) ^ t) & t & 0xf; 532 port->fuzz = (NSEC_PER_MSEC * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS; 533 534 for (i = 0; i < ANALOG_INIT_RETRIES; i++) { 535 if (!analog_cooked_read(port)) 536 break; 537 msleep(ANALOG_MAX_TIME); 538 } 539 540 u = v = 0; 541 542 msleep(ANALOG_MAX_TIME); 543 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000); 544 gameport_trigger(gameport); 545 while ((gameport_read(port->gameport) & port->mask) && (u < t)) 546 u++; 547 udelay(ANALOG_SAITEK_DELAY); 548 t = gameport_time(gameport, ANALOG_SAITEK_TIME); 549 gameport_trigger(gameport); 550 while ((gameport_read(port->gameport) & port->mask) && (v < t)) 551 v++; 552 553 if (v < (u >> 1)) { /* FIXME - more than one port */ 554 analog_options[0] |= /* FIXME - more than one port */ 555 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF; 556 return 0; 557 } 558 559 gameport_close(gameport); 560 } 561 562 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { 563 564 for (i = 0; i < ANALOG_INIT_RETRIES; i++) 565 if (!gameport_cooked_read(gameport, port->axes, &port->buttons)) 566 break; 567 for (i = 0; i < 4; i++) 568 if (port->axes[i] != -1) 569 port->mask |= 1 << i; 570 571 port->fuzz = gameport->fuzz; 572 port->cooked = 1; 573 return 0; 574 } 575 576 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 577} 578 579static int analog_connect(struct gameport *gameport, struct gameport_driver *drv) 580{ 581 struct analog_port *port; 582 int i; 583 int err; 584 585 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL))) 586 return -ENOMEM; 587 588 err = analog_init_port(gameport, drv, port); 589 if (err) 590 goto fail1; 591 592 err = analog_init_masks(port); 593 if (err) 594 goto fail2; 595 596 gameport_set_poll_handler(gameport, analog_poll); 597 gameport_set_poll_interval(gameport, 10); 598 599 for (i = 0; i < 2; i++) 600 if (port->analog[i].mask) { 601 err = analog_init_device(port, port->analog + i, i); 602 if (err) 603 goto fail3; 604 } 605 606 return 0; 607 608 fail3: while (--i >= 0) 609 if (port->analog[i].mask) 610 input_unregister_device(port->analog[i].dev); 611 fail2: gameport_close(gameport); 612 fail1: gameport_set_drvdata(gameport, NULL); 613 kfree(port); 614 return err; 615} 616 617static void analog_disconnect(struct gameport *gameport) 618{ 619 struct analog_port *port = gameport_get_drvdata(gameport); 620 int i; 621 622 for (i = 0; i < 2; i++) 623 if (port->analog[i].mask) 624 input_unregister_device(port->analog[i].dev); 625 gameport_close(gameport); 626 gameport_set_drvdata(gameport, NULL); 627 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n", 628 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0, 629 port->gameport->phys); 630 kfree(port); 631} 632 633struct analog_types { 634 char *name; 635 int value; 636}; 637 638static struct analog_types analog_types[] = { 639 { "none", 0x00000000 }, 640 { "auto", 0x000000ff }, 641 { "2btn", 0x0000003f }, 642 { "y-joy", 0x0cc00033 }, 643 { "y-pad", 0x8cc80033 }, 644 { "fcs", 0x000008f7 }, 645 { "chf", 0x000002ff }, 646 { "fullchf", 0x000007ff }, 647 { "gamepad", 0x000830f3 }, 648 { "gamepad8", 0x0008f0f3 }, 649 { NULL, 0 } 650}; 651 652static void analog_parse_options(void) 653{ 654 int i, j; 655 char *end; 656 657 for (i = 0; i < js_nargs; i++) { 658 659 for (j = 0; analog_types[j].name; j++) 660 if (!strcmp(analog_types[j].name, js[i])) { 661 analog_options[i] = analog_types[j].value; 662 break; 663 } 664 if (analog_types[j].name) continue; 665 666 analog_options[i] = simple_strtoul(js[i], &end, 0); 667 if (end != js[i]) continue; 668 669 analog_options[i] = 0xff; 670 if (!strlen(js[i])) continue; 671 672 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]); 673 } 674 675 for (; i < ANALOG_PORTS; i++) 676 analog_options[i] = 0xff; 677} 678 679/* 680 * The gameport device structure. 681 */ 682 683static struct gameport_driver analog_drv = { 684 .driver = { 685 .name = "analog", 686 }, 687 .description = DRIVER_DESC, 688 .connect = analog_connect, 689 .disconnect = analog_disconnect, 690}; 691 692static int __init analog_init(void) 693{ 694 analog_parse_options(); 695 return gameport_register_driver(&analog_drv); 696} 697 698static void __exit analog_exit(void) 699{ 700 gameport_unregister_driver(&analog_drv); 701} 702 703module_init(analog_init); 704module_exit(analog_exit); 705