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 /* 11 */ 12 13 #include <linux/delay.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/bitops.h> 18 #include <linux/init.h> 19 #include <linux/input.h> 20 #include <linux/gameport.h> 21 #include <linux/jiffies.h> 22 #include <linux/seq_buf.h> 23 #include <linux/timex.h> 24 #include <linux/timekeeping.h> 25 26 #define DRIVER_DESC "Analog joystick and gamepad driver" 27 28 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 29 MODULE_DESCRIPTION(DRIVER_DESC); 30 MODULE_LICENSE("GPL"); 31 32 /* 33 * Option parsing. 34 */ 35 36 #define ANALOG_PORTS 16 37 38 static char *js[ANALOG_PORTS]; 39 static unsigned int js_nargs; 40 static int analog_options[ANALOG_PORTS]; 41 module_param_array_named(map, js, charp, &js_nargs, 0); 42 MODULE_PARM_DESC(map, "Describes analog joysticks type/capabilities"); 43 44 /* 45 * Times, feature definitions. 46 */ 47 48 #define ANALOG_RUDDER 0x00004 49 #define ANALOG_THROTTLE 0x00008 50 #define ANALOG_AXES_STD 0x0000f 51 #define ANALOG_BTNS_STD 0x000f0 52 53 #define ANALOG_BTNS_CHF 0x00100 54 #define ANALOG_HAT1_CHF 0x00200 55 #define ANALOG_HAT2_CHF 0x00400 56 #define ANALOG_HAT_FCS 0x00800 57 #define ANALOG_HATS_ALL 0x00e00 58 #define ANALOG_BTN_TL 0x01000 59 #define ANALOG_BTN_TR 0x02000 60 #define ANALOG_BTN_TL2 0x04000 61 #define ANALOG_BTN_TR2 0x08000 62 #define ANALOG_BTNS_TLR 0x03000 63 #define ANALOG_BTNS_TLR2 0x0c000 64 #define ANALOG_BTNS_GAMEPAD 0x0f000 65 66 #define ANALOG_HBTN_CHF 0x10000 67 #define ANALOG_ANY_CHF 0x10700 68 #define ANALOG_SAITEK 0x20000 69 #define ANALOG_EXTENSIONS 0x7ff00 70 #define ANALOG_GAMEPAD 0x80000 71 72 #define ANALOG_MAX_TIME 3 /* 3 ms */ 73 #define ANALOG_LOOP_TIME 2000 /* 2 * loop */ 74 #define ANALOG_SAITEK_DELAY 200 /* 200 us */ 75 #define ANALOG_SAITEK_TIME 2000 /* 2000 us */ 76 #define ANALOG_AXIS_TIME 2 /* 2 * refresh */ 77 #define ANALOG_INIT_RETRIES 8 /* 8 times */ 78 #define ANALOG_FUZZ_BITS 2 /* 2 bit more */ 79 #define ANALOG_FUZZ_MAGIC 36 /* 36 u*ms/loop */ 80 81 #define ANALOG_MAX_NAME_LENGTH 128 82 #define ANALOG_MAX_PHYS_LENGTH 32 83 84 static short analog_axes[] = { ABS_X, ABS_Y, ABS_RUDDER, ABS_THROTTLE }; 85 static short analog_hats[] = { ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, ABS_HAT2X, ABS_HAT2Y }; 86 static short analog_pads[] = { BTN_Y, BTN_Z, BTN_TL, BTN_TR }; 87 static short analog_exts[] = { ANALOG_HAT1_CHF, ANALOG_HAT2_CHF, ANALOG_HAT_FCS }; 88 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 }; 89 static short analog_joy_btn[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, 90 BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_BASE6 }; 91 92 static unsigned char analog_chf[] = { 0xf, 0x0, 0x1, 0x9, 0x2, 0x4, 0xc, 0x8, 0x3, 0x5, 0xb, 0x7, 0xd, 0xe, 0xa, 0x6 }; 93 94 struct analog { 95 struct input_dev *dev; 96 int mask; 97 short *buttons; 98 char name[ANALOG_MAX_NAME_LENGTH]; 99 char phys[ANALOG_MAX_PHYS_LENGTH]; 100 }; 101 102 struct analog_port { 103 struct gameport *gameport; 104 struct analog analog[2]; 105 unsigned char mask; 106 char saitek; 107 char cooked; 108 int bads; 109 int reads; 110 int loop; 111 int fuzz; 112 int axes[4]; 113 int buttons; 114 int initial[4]; 115 int axtime; 116 }; 117 118 /* 119 * analog_decode() decodes analog joystick data and reports input events. 120 */ 121 122 static void analog_decode(struct analog *analog, int *axes, int *initial, int buttons) 123 { 124 struct input_dev *dev = analog->dev; 125 int i, j; 126 127 if (analog->mask & ANALOG_HAT_FCS) 128 for (i = 0; i < 4; i++) 129 if (axes[3] < ((initial[3] * ((i << 1) + 1)) >> 3)) { 130 buttons |= 1 << (i + 14); 131 break; 132 } 133 134 for (i = j = 0; i < 6; i++) 135 if (analog->mask & (0x10 << i)) 136 input_report_key(dev, analog->buttons[j++], (buttons >> i) & 1); 137 138 if (analog->mask & ANALOG_HBTN_CHF) 139 for (i = 0; i < 4; i++) 140 input_report_key(dev, analog->buttons[j++], (buttons >> (i + 10)) & 1); 141 142 if (analog->mask & ANALOG_BTN_TL) 143 input_report_key(dev, analog_pads[0], axes[2] < (initial[2] >> 1)); 144 if (analog->mask & ANALOG_BTN_TR) 145 input_report_key(dev, analog_pads[1], axes[3] < (initial[3] >> 1)); 146 if (analog->mask & ANALOG_BTN_TL2) 147 input_report_key(dev, analog_pads[2], axes[2] > (initial[2] + (initial[2] >> 1))); 148 if (analog->mask & ANALOG_BTN_TR2) 149 input_report_key(dev, analog_pads[3], axes[3] > (initial[3] + (initial[3] >> 1))); 150 151 for (i = j = 0; i < 4; i++) 152 if (analog->mask & (1 << i)) 153 input_report_abs(dev, analog_axes[j++], axes[i]); 154 155 for (i = j = 0; i < 3; i++) 156 if (analog->mask & analog_exts[i]) { 157 input_report_abs(dev, analog_hats[j++], 158 ((buttons >> ((i << 2) + 7)) & 1) - ((buttons >> ((i << 2) + 9)) & 1)); 159 input_report_abs(dev, analog_hats[j++], 160 ((buttons >> ((i << 2) + 8)) & 1) - ((buttons >> ((i << 2) + 6)) & 1)); 161 } 162 163 input_sync(dev); 164 } 165 166 /* 167 * analog_cooked_read() reads analog joystick data. 168 */ 169 170 static int analog_cooked_read(struct analog_port *port) 171 { 172 struct gameport *gameport = port->gameport; 173 ktime_t time[4], start, loop, now; 174 unsigned int loopout, timeout; 175 unsigned char data[4], this, last; 176 unsigned long flags; 177 int i, j; 178 179 loopout = (ANALOG_LOOP_TIME * port->loop) / 1000; 180 timeout = ANALOG_MAX_TIME * NSEC_PER_MSEC; 181 182 local_irq_save(flags); 183 gameport_trigger(gameport); 184 now = ktime_get(); 185 local_irq_restore(flags); 186 187 start = now; 188 this = port->mask; 189 i = 0; 190 191 do { 192 loop = now; 193 last = this; 194 195 local_irq_disable(); 196 this = gameport_read(gameport) & port->mask; 197 now = ktime_get(); 198 local_irq_restore(flags); 199 200 if ((last ^ this) && (ktime_sub(now, loop) < loopout)) { 201 data[i] = last ^ this; 202 time[i] = now; 203 i++; 204 } 205 206 } while (this && (i < 4) && (ktime_sub(now, start) < timeout)); 207 208 this <<= 4; 209 210 for (--i; i >= 0; i--) { 211 this |= data[i]; 212 for (j = 0; j < 4; j++) 213 if (data[i] & (1 << j)) 214 port->axes[j] = ((u32)ktime_sub(time[i], start) << ANALOG_FUZZ_BITS) / port->loop; 215 } 216 217 return -(this != port->mask); 218 } 219 220 static int analog_button_read(struct analog_port *port, char saitek, char chf) 221 { 222 unsigned char u; 223 int t = 1, i = 0; 224 int strobe = gameport_time(port->gameport, ANALOG_SAITEK_TIME); 225 226 u = gameport_read(port->gameport); 227 228 if (!chf) { 229 port->buttons = (~u >> 4) & 0xf; 230 return 0; 231 } 232 233 port->buttons = 0; 234 235 while ((~u & 0xf0) && (i < 16) && t) { 236 port->buttons |= 1 << analog_chf[(~u >> 4) & 0xf]; 237 if (!saitek) return 0; 238 udelay(ANALOG_SAITEK_DELAY); 239 t = strobe; 240 gameport_trigger(port->gameport); 241 while (((u = gameport_read(port->gameport)) & port->mask) && t) t--; 242 i++; 243 } 244 245 return -(!t || (i == 16)); 246 } 247 248 /* 249 * analog_poll() repeatedly polls the Analog joysticks. 250 */ 251 252 static void analog_poll(struct gameport *gameport) 253 { 254 struct analog_port *port = gameport_get_drvdata(gameport); 255 int i; 256 257 char saitek = !!(port->analog[0].mask & ANALOG_SAITEK); 258 char chf = !!(port->analog[0].mask & ANALOG_ANY_CHF); 259 260 if (port->cooked) { 261 port->bads -= gameport_cooked_read(port->gameport, port->axes, &port->buttons); 262 if (chf) 263 port->buttons = port->buttons ? (1 << analog_chf[port->buttons]) : 0; 264 port->reads++; 265 } else { 266 if (!port->axtime--) { 267 port->bads -= analog_cooked_read(port); 268 port->bads -= analog_button_read(port, saitek, chf); 269 port->reads++; 270 port->axtime = ANALOG_AXIS_TIME - 1; 271 } else { 272 if (!saitek) 273 analog_button_read(port, saitek, chf); 274 } 275 } 276 277 for (i = 0; i < 2; i++) 278 if (port->analog[i].mask) 279 analog_decode(port->analog + i, port->axes, port->initial, port->buttons); 280 } 281 282 /* 283 * analog_open() is a callback from the input open routine. 284 */ 285 286 static int analog_open(struct input_dev *dev) 287 { 288 struct analog_port *port = input_get_drvdata(dev); 289 290 gameport_start_polling(port->gameport); 291 return 0; 292 } 293 294 /* 295 * analog_close() is a callback from the input close routine. 296 */ 297 298 static void analog_close(struct input_dev *dev) 299 { 300 struct analog_port *port = input_get_drvdata(dev); 301 302 gameport_stop_polling(port->gameport); 303 } 304 305 /* 306 * analog_calibrate_timer() calibrates the timer and computes loop 307 * and timeout values for a joystick port. 308 */ 309 310 static void analog_calibrate_timer(struct analog_port *port) 311 { 312 struct gameport *gameport = port->gameport; 313 unsigned int i, t, tx; 314 ktime_t t1, t2, t3; 315 unsigned long flags; 316 317 tx = ~0; 318 319 for (i = 0; i < 50; i++) { 320 local_irq_save(flags); 321 t1 = ktime_get(); 322 for (t = 0; t < 50; t++) { 323 gameport_read(gameport); 324 t2 = ktime_get(); 325 } 326 t3 = ktime_get(); 327 local_irq_restore(flags); 328 udelay(i); 329 t = ktime_sub(t2, t1) - ktime_sub(t3, t2); 330 if (t < tx) tx = t; 331 } 332 333 port->loop = tx / 50; 334 } 335 336 /* 337 * analog_name() constructs a name for an analog joystick. 338 */ 339 340 static void analog_name(struct analog *analog) 341 { 342 struct seq_buf s; 343 344 seq_buf_init(&s, analog->name, sizeof(analog->name)); 345 seq_buf_printf(&s, "Analog %d-axis %d-button", 346 hweight8(analog->mask & ANALOG_AXES_STD), 347 hweight8(analog->mask & ANALOG_BTNS_STD) + !!(analog->mask & ANALOG_BTNS_CHF) * 2 + 348 hweight16(analog->mask & ANALOG_BTNS_GAMEPAD) + !!(analog->mask & ANALOG_HBTN_CHF) * 4); 349 350 if (analog->mask & ANALOG_HATS_ALL) 351 seq_buf_printf(&s, " %d-hat", 352 hweight16(analog->mask & ANALOG_HATS_ALL)); 353 354 if (analog->mask & ANALOG_HAT_FCS) 355 seq_buf_printf(&s, " FCS"); 356 if (analog->mask & ANALOG_ANY_CHF) 357 seq_buf_printf(&s, (analog->mask & ANALOG_SAITEK) ? " Saitek" : " CHF"); 358 359 seq_buf_printf(&s, (analog->mask & ANALOG_GAMEPAD) ? " gamepad" : " joystick"); 360 } 361 362 /* 363 * analog_init_device() 364 */ 365 366 static int analog_init_device(struct analog_port *port, struct analog *analog, int index) 367 { 368 struct input_dev *input_dev; 369 int i, j, t, v, w, x, y, z; 370 int error; 371 372 analog_name(analog); 373 snprintf(analog->phys, sizeof(analog->phys), 374 "%s/input%d", port->gameport->phys, index); 375 analog->buttons = (analog->mask & ANALOG_GAMEPAD) ? analog_pad_btn : analog_joy_btn; 376 377 analog->dev = input_dev = input_allocate_device(); 378 if (!input_dev) 379 return -ENOMEM; 380 381 input_dev->name = analog->name; 382 input_dev->phys = analog->phys; 383 input_dev->id.bustype = BUS_GAMEPORT; 384 input_dev->id.vendor = GAMEPORT_ID_VENDOR_ANALOG; 385 input_dev->id.product = analog->mask >> 4; 386 input_dev->id.version = 0x0100; 387 input_dev->dev.parent = &port->gameport->dev; 388 389 input_set_drvdata(input_dev, port); 390 391 input_dev->open = analog_open; 392 input_dev->close = analog_close; 393 394 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 395 396 for (i = j = 0; i < 4; i++) 397 if (analog->mask & (1 << i)) { 398 399 t = analog_axes[j]; 400 x = port->axes[i]; 401 y = (port->axes[0] + port->axes[1]) >> 1; 402 z = y - port->axes[i]; 403 z = z > 0 ? z : -z; 404 v = (x >> 3); 405 w = (x >> 3); 406 407 if ((i == 2 || i == 3) && (j == 2 || j == 3) && (z > (y >> 3))) 408 x = y; 409 410 if (analog->mask & ANALOG_SAITEK) { 411 if (i == 2) x = port->axes[i]; 412 v = x - (x >> 2); 413 w = (x >> 4); 414 } 415 416 input_set_abs_params(input_dev, t, v, (x << 1) - v, port->fuzz, w); 417 j++; 418 } 419 420 for (i = j = 0; i < 3; i++) 421 if (analog->mask & analog_exts[i]) 422 for (x = 0; x < 2; x++) { 423 t = analog_hats[j++]; 424 input_set_abs_params(input_dev, t, -1, 1, 0, 0); 425 } 426 427 for (i = j = 0; i < 4; i++) 428 if (analog->mask & (0x10 << i)) 429 set_bit(analog->buttons[j++], input_dev->keybit); 430 431 if (analog->mask & ANALOG_BTNS_CHF) 432 for (i = 0; i < 2; i++) 433 set_bit(analog->buttons[j++], input_dev->keybit); 434 435 if (analog->mask & ANALOG_HBTN_CHF) 436 for (i = 0; i < 4; i++) 437 set_bit(analog->buttons[j++], input_dev->keybit); 438 439 for (i = 0; i < 4; i++) 440 if (analog->mask & (ANALOG_BTN_TL << i)) 441 set_bit(analog_pads[i], input_dev->keybit); 442 443 analog_decode(analog, port->axes, port->initial, port->buttons); 444 445 error = input_register_device(analog->dev); 446 if (error) { 447 input_free_device(analog->dev); 448 return error; 449 } 450 451 return 0; 452 } 453 454 /* 455 * analog_init_devices() sets up device-specific values and registers the input devices. 456 */ 457 458 static int analog_init_masks(struct analog_port *port) 459 { 460 int i; 461 struct analog *analog = port->analog; 462 int max[4]; 463 464 if (!port->mask) 465 return -1; 466 467 if ((port->mask & 3) != 3 && port->mask != 0xc) { 468 printk(KERN_WARNING "analog.c: Unknown joystick device found " 469 "(data=%#x, %s), probably not analog joystick.\n", 470 port->mask, port->gameport->phys); 471 return -1; 472 } 473 474 475 i = analog_options[0]; /* FIXME !!! - need to specify options for different ports */ 476 477 analog[0].mask = i & 0xfffff; 478 479 analog[0].mask &= ~(ANALOG_AXES_STD | ANALOG_HAT_FCS | ANALOG_BTNS_GAMEPAD) 480 | port->mask | ((port->mask << 8) & ANALOG_HAT_FCS) 481 | ((port->mask << 10) & ANALOG_BTNS_TLR) | ((port->mask << 12) & ANALOG_BTNS_TLR2); 482 483 analog[0].mask &= ~(ANALOG_HAT2_CHF) 484 | ((analog[0].mask & ANALOG_HBTN_CHF) ? 0 : ANALOG_HAT2_CHF); 485 486 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_BTN_TR | ANALOG_BTN_TR2) 487 | ((~analog[0].mask & ANALOG_HAT_FCS) >> 8) 488 | ((~analog[0].mask & ANALOG_HAT_FCS) << 2) 489 | ((~analog[0].mask & ANALOG_HAT_FCS) << 4); 490 491 analog[0].mask &= ~(ANALOG_THROTTLE | ANALOG_RUDDER) 492 | (((~analog[0].mask & ANALOG_BTNS_TLR ) >> 10) 493 & ((~analog[0].mask & ANALOG_BTNS_TLR2) >> 12)); 494 495 analog[1].mask = ((i >> 20) & 0xff) | ((i >> 12) & 0xf0000); 496 497 analog[1].mask &= (analog[0].mask & ANALOG_EXTENSIONS) ? ANALOG_GAMEPAD 498 : (((ANALOG_BTNS_STD | port->mask) & ~analog[0].mask) | ANALOG_GAMEPAD); 499 500 if (port->cooked) { 501 502 for (i = 0; i < 4; i++) max[i] = port->axes[i] << 1; 503 504 if ((analog[0].mask & 0x7) == 0x7) max[2] = (max[0] + max[1]) >> 1; 505 if ((analog[0].mask & 0xb) == 0xb) max[3] = (max[0] + max[1]) >> 1; 506 if ((analog[0].mask & ANALOG_BTN_TL) && !(analog[0].mask & ANALOG_BTN_TL2)) max[2] >>= 1; 507 if ((analog[0].mask & ANALOG_BTN_TR) && !(analog[0].mask & ANALOG_BTN_TR2)) max[3] >>= 1; 508 if ((analog[0].mask & ANALOG_HAT_FCS)) max[3] >>= 1; 509 510 gameport_calibrate(port->gameport, port->axes, max); 511 } 512 513 for (i = 0; i < 4; i++) 514 port->initial[i] = port->axes[i]; 515 516 return -!(analog[0].mask || analog[1].mask); 517 } 518 519 static int analog_init_port(struct gameport *gameport, struct gameport_driver *drv, struct analog_port *port) 520 { 521 int i, t, u, v; 522 523 port->gameport = gameport; 524 525 gameport_set_drvdata(gameport, port); 526 527 if (!gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { 528 529 analog_calibrate_timer(port); 530 531 gameport_trigger(gameport); 532 t = gameport_read(gameport); 533 msleep(ANALOG_MAX_TIME); 534 port->mask = (gameport_read(gameport) ^ t) & t & 0xf; 535 port->fuzz = (NSEC_PER_MSEC * ANALOG_FUZZ_MAGIC) / port->loop / 1000 + ANALOG_FUZZ_BITS; 536 537 for (i = 0; i < ANALOG_INIT_RETRIES; i++) { 538 if (!analog_cooked_read(port)) 539 break; 540 msleep(ANALOG_MAX_TIME); 541 } 542 543 u = v = 0; 544 545 msleep(ANALOG_MAX_TIME); 546 t = gameport_time(gameport, ANALOG_MAX_TIME * 1000); 547 gameport_trigger(gameport); 548 while ((gameport_read(port->gameport) & port->mask) && (u < t)) 549 u++; 550 udelay(ANALOG_SAITEK_DELAY); 551 t = gameport_time(gameport, ANALOG_SAITEK_TIME); 552 gameport_trigger(gameport); 553 while ((gameport_read(port->gameport) & port->mask) && (v < t)) 554 v++; 555 556 if (v < (u >> 1)) { /* FIXME - more than one port */ 557 analog_options[0] |= /* FIXME - more than one port */ 558 ANALOG_SAITEK | ANALOG_BTNS_CHF | ANALOG_HBTN_CHF | ANALOG_HAT1_CHF; 559 return 0; 560 } 561 562 gameport_close(gameport); 563 } 564 565 if (!gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { 566 567 for (i = 0; i < ANALOG_INIT_RETRIES; i++) 568 if (!gameport_cooked_read(gameport, port->axes, &port->buttons)) 569 break; 570 for (i = 0; i < 4; i++) 571 if (port->axes[i] != -1) 572 port->mask |= 1 << i; 573 574 port->fuzz = gameport->fuzz; 575 port->cooked = 1; 576 return 0; 577 } 578 579 return gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 580 } 581 582 static int analog_connect(struct gameport *gameport, struct gameport_driver *drv) 583 { 584 struct analog_port *port; 585 int i; 586 int err; 587 588 if (!(port = kzalloc(sizeof(struct analog_port), GFP_KERNEL))) 589 return -ENOMEM; 590 591 err = analog_init_port(gameport, drv, port); 592 if (err) 593 goto fail1; 594 595 err = analog_init_masks(port); 596 if (err) 597 goto fail2; 598 599 gameport_set_poll_handler(gameport, analog_poll); 600 gameport_set_poll_interval(gameport, 10); 601 602 for (i = 0; i < 2; i++) 603 if (port->analog[i].mask) { 604 err = analog_init_device(port, port->analog + i, i); 605 if (err) 606 goto fail3; 607 } 608 609 return 0; 610 611 fail3: while (--i >= 0) 612 if (port->analog[i].mask) 613 input_unregister_device(port->analog[i].dev); 614 fail2: gameport_close(gameport); 615 fail1: gameport_set_drvdata(gameport, NULL); 616 kfree(port); 617 return err; 618 } 619 620 static void analog_disconnect(struct gameport *gameport) 621 { 622 struct analog_port *port = gameport_get_drvdata(gameport); 623 int i; 624 625 for (i = 0; i < 2; i++) 626 if (port->analog[i].mask) 627 input_unregister_device(port->analog[i].dev); 628 gameport_close(gameport); 629 gameport_set_drvdata(gameport, NULL); 630 printk(KERN_INFO "analog.c: %d out of %d reads (%d%%) on %s failed\n", 631 port->bads, port->reads, port->reads ? (port->bads * 100 / port->reads) : 0, 632 port->gameport->phys); 633 kfree(port); 634 } 635 636 struct analog_types { 637 char *name; 638 int value; 639 }; 640 641 static struct analog_types analog_types[] = { 642 { "none", 0x00000000 }, 643 { "auto", 0x000000ff }, 644 { "2btn", 0x0000003f }, 645 { "y-joy", 0x0cc00033 }, 646 { "y-pad", 0x8cc80033 }, 647 { "fcs", 0x000008f7 }, 648 { "chf", 0x000002ff }, 649 { "fullchf", 0x000007ff }, 650 { "gamepad", 0x000830f3 }, 651 { "gamepad8", 0x0008f0f3 }, 652 { NULL, 0 } 653 }; 654 655 static void analog_parse_options(void) 656 { 657 int i, j; 658 char *end; 659 660 for (i = 0; i < js_nargs; i++) { 661 662 for (j = 0; analog_types[j].name; j++) 663 if (!strcmp(analog_types[j].name, js[i])) { 664 analog_options[i] = analog_types[j].value; 665 break; 666 } 667 if (analog_types[j].name) continue; 668 669 analog_options[i] = simple_strtoul(js[i], &end, 0); 670 if (end != js[i]) continue; 671 672 analog_options[i] = 0xff; 673 if (!strlen(js[i])) continue; 674 675 printk(KERN_WARNING "analog.c: Bad config for port %d - \"%s\"\n", i, js[i]); 676 } 677 678 for (; i < ANALOG_PORTS; i++) 679 analog_options[i] = 0xff; 680 } 681 682 /* 683 * The gameport device structure. 684 */ 685 686 static struct gameport_driver analog_drv = { 687 .driver = { 688 .name = "analog", 689 }, 690 .description = DRIVER_DESC, 691 .connect = analog_connect, 692 .disconnect = analog_disconnect, 693 }; 694 695 static int __init analog_init(void) 696 { 697 analog_parse_options(); 698 return gameport_register_driver(&analog_drv); 699 } 700 701 static void __exit analog_exit(void) 702 { 703 gameport_unregister_driver(&analog_drv); 704 } 705 706 module_init(analog_init); 707 module_exit(analog_exit); 708