1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Copyright (c) 1998-2005 Vojtech Pavlik 4 */ 5 6/* 7 * Microsoft SideWinder joystick family 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/input.h> 15#include <linux/gameport.h> 16#include <linux/jiffies.h> 17 18#define DRIVER_DESC "Microsoft SideWinder joystick family driver" 19 20MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 21MODULE_DESCRIPTION(DRIVER_DESC); 22MODULE_LICENSE("GPL"); 23 24/* 25 * These are really magic values. Changing them can make a problem go away, 26 * as well as break everything. 27 */ 28 29#undef SW_DEBUG 30#undef SW_DEBUG_DATA 31 32#define SW_START 600 /* The time we wait for the first bit [600 us] */ 33#define SW_STROBE 60 /* Max time per bit [60 us] */ 34#define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ 35#define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ 36#define SW_END 8 /* Number of bits before end of packet to kick */ 37#define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ 38#define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ 39#define SW_OK 64 /* Number of packet read successes to switch optimization back on */ 40#define SW_LENGTH 512 /* Max number of bits in a packet */ 41 42#ifdef SW_DEBUG 43#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) 44#else 45#define dbg(format, arg...) do {} while (0) 46#endif 47 48/* 49 * SideWinder joystick types ... 50 */ 51 52#define SW_ID_3DP 0 53#define SW_ID_GP 1 54#define SW_ID_PP 2 55#define SW_ID_FFP 3 56#define SW_ID_FSP 4 57#define SW_ID_FFW 5 58 59/* 60 * Names, buttons, axes ... 61 */ 62 63static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", 64 "Force Feedback Wheel" }; 65 66static char sw_abs[][7] = { 67 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 68 { ABS_X, ABS_Y }, 69 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 70 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 71 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 72 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; 73 74static char sw_bit[][7] = { 75 { 10, 10, 9, 10, 1, 1 }, 76 { 1, 1 }, 77 { 10, 10, 6, 7, 1, 1 }, 78 { 10, 10, 6, 7, 1, 1 }, 79 { 10, 10, 6, 1, 1 }, 80 { 10, 7, 7, 1, 1 }}; 81 82static short sw_btn[][12] = { 83 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, 84 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, 85 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 86 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 87 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, 88 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; 89 90static struct { 91 int x; 92 int y; 93} sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 94 95struct sw { 96 struct gameport *gameport; 97 struct input_dev *dev[4]; 98 char name[64]; 99 char phys[4][32]; 100 int length; 101 int type; 102 int bits; 103 int number; 104 int fail; 105 int ok; 106 int reads; 107 int bads; 108}; 109 110/* 111 * sw_read_packet() is a function which reads either a data packet, or an 112 * identification packet from a SideWinder joystick. The protocol is very, 113 * very, very braindamaged. Microsoft patented it in US patent #5628686. 114 */ 115 116static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) 117{ 118 unsigned long flags; 119 int timeout, bitout, sched, i, kick, start, strobe; 120 unsigned char pending, u, v; 121 122 i = -id; /* Don't care about data, only want ID */ 123 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ 124 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ 125 start = gameport_time(gameport, SW_START); 126 strobe = gameport_time(gameport, SW_STROBE); 127 bitout = start; 128 pending = 0; 129 sched = 0; 130 131 local_irq_save(flags); /* Quiet, please */ 132 133 gameport_trigger(gameport); /* Trigger */ 134 v = gameport_read(gameport); 135 136 do { 137 bitout--; 138 u = v; 139 v = gameport_read(gameport); 140 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ 141 142 if (bitout > 0) 143 bitout = strobe; /* Extend time if not timed out */ 144 145 while ((timeout > 0 || bitout > 0) && (i < length)) { 146 147 timeout--; 148 bitout--; /* Decrement timers */ 149 sched--; 150 151 u = v; 152 v = gameport_read(gameport); 153 154 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ 155 if (i >= 0) /* Want this data */ 156 buf[i] = v >> 5; /* Store it */ 157 i++; /* Advance index */ 158 bitout = strobe; /* Extend timeout for next bit */ 159 } 160 161 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ 162 sched = kick; /* Schedule second trigger */ 163 kick = 0; /* Don't schedule next time on falling edge */ 164 pending = 1; /* Mark schedule */ 165 } 166 167 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ 168 gameport_trigger(gameport); /* Trigger */ 169 bitout = start; /* Long bit timeout */ 170 pending = 0; /* Unmark schedule */ 171 timeout = 0; /* Switch from global to bit timeouts */ 172 } 173 } 174 175 local_irq_restore(flags); /* Done - relax */ 176 177#ifdef SW_DEBUG_DATA 178 { 179 int j; 180 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); 181 for (j = 0; j < i; j++) printk("%d", buf[j]); 182 printk("]\n"); 183 } 184#endif 185 186 return i; 187} 188 189/* 190 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. 191 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 192 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 193 * is number of bits per triplet. 194 */ 195 196#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) 197 198static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) 199{ 200 __u64 data = 0; 201 int tri = pos % bits; /* Start position */ 202 int i = pos / bits; 203 int bit = 0; 204 205 while (num--) { 206 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ 207 if (tri == bits) { 208 i++; /* Next triplet */ 209 tri = 0; 210 } 211 } 212 213 return data; 214} 215 216/* 217 * sw_init_digital() initializes a SideWinder 3D Pro joystick 218 * into digital mode. 219 */ 220 221static void sw_init_digital(struct gameport *gameport) 222{ 223 static const int seq[] = { 140, 140+725, 140+300, 0 }; 224 unsigned long flags; 225 int i, t; 226 227 local_irq_save(flags); 228 229 i = 0; 230 do { 231 gameport_trigger(gameport); /* Trigger */ 232 t = gameport_time(gameport, SW_TIMEOUT * 1000); 233 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ 234 udelay(seq[i]); /* Delay magic time */ 235 } while (seq[++i]); 236 237 gameport_trigger(gameport); /* Last trigger */ 238 239 local_irq_restore(flags); 240} 241 242/* 243 * sw_parity() computes parity of __u64 244 */ 245 246static int sw_parity(__u64 t) 247{ 248 int x = t ^ (t >> 32); 249 250 x ^= x >> 16; 251 x ^= x >> 8; 252 x ^= x >> 4; 253 x ^= x >> 2; 254 x ^= x >> 1; 255 return x & 1; 256} 257 258/* 259 * sw_ccheck() checks synchronization bits and computes checksum of nibbles. 260 */ 261 262static int sw_check(__u64 t) 263{ 264 unsigned char sum = 0; 265 266 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ 267 return -1; 268 269 while (t) { /* Sum */ 270 sum += t & 0xf; 271 t >>= 4; 272 } 273 274 return sum & 0xf; 275} 276 277/* 278 * sw_parse() analyzes SideWinder joystick data, and writes the results into 279 * the axes and buttons arrays. 280 */ 281 282static int sw_parse(unsigned char *buf, struct sw *sw) 283{ 284 int hat, i, j; 285 struct input_dev *dev; 286 287 switch (sw->type) { 288 289 case SW_ID_3DP: 290 291 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) 292 return -1; 293 294 dev = sw->dev[0]; 295 296 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 297 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 298 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 299 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 300 301 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 302 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 303 304 for (j = 0; j < 7; j++) 305 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 306 307 input_report_key(dev, BTN_BASE4, !GB(38,1)); 308 input_report_key(dev, BTN_BASE5, !GB(37,1)); 309 310 input_sync(dev); 311 312 return 0; 313 314 case SW_ID_GP: 315 316 for (i = 0; i < sw->number; i ++) { 317 318 if (sw_parity(GB(i*15,15))) 319 return -1; 320 321 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 322 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 323 324 for (j = 0; j < 10; j++) 325 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 326 327 input_sync(sw->dev[i]); 328 } 329 330 return 0; 331 332 case SW_ID_PP: 333 case SW_ID_FFP: 334 335 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 336 return -1; 337 338 dev = sw->dev[0]; 339 input_report_abs(dev, ABS_X, GB( 9,10)); 340 input_report_abs(dev, ABS_Y, GB(19,10)); 341 input_report_abs(dev, ABS_RZ, GB(36, 6)); 342 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 343 344 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 345 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 346 347 for (j = 0; j < 9; j++) 348 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 349 350 input_sync(dev); 351 352 return 0; 353 354 case SW_ID_FSP: 355 356 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 357 return -1; 358 359 dev = sw->dev[0]; 360 input_report_abs(dev, ABS_X, GB( 0,10)); 361 input_report_abs(dev, ABS_Y, GB(16,10)); 362 input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); 363 364 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 365 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 366 367 for (j = 0; j < 6; j++) 368 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); 369 370 input_report_key(dev, BTN_TR, !GB(26,1)); 371 input_report_key(dev, BTN_START, !GB(27,1)); 372 input_report_key(dev, BTN_MODE, !GB(38,1)); 373 input_report_key(dev, BTN_SELECT, !GB(39,1)); 374 375 input_sync(dev); 376 377 return 0; 378 379 case SW_ID_FFW: 380 381 if (!sw_parity(GB(0,33))) 382 return -1; 383 384 dev = sw->dev[0]; 385 input_report_abs(dev, ABS_RX, GB( 0,10)); 386 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 387 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 388 389 for (j = 0; j < 8; j++) 390 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 391 392 input_sync(dev); 393 394 return 0; 395 } 396 397 return -1; 398} 399 400/* 401 * sw_read() reads SideWinder joystick data, and reinitializes 402 * the joystick in case of persistent problems. This is the function that is 403 * called from the generic code to poll the joystick. 404 */ 405 406static int sw_read(struct sw *sw) 407{ 408 unsigned char buf[SW_LENGTH]; 409 int i; 410 411 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 412 413 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 414 415 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 416 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 417 " - going to reinitialize.\n", sw->gameport->phys); 418 sw->fail = SW_FAIL; /* Reinitialize */ 419 i = 128; /* Bogus value */ 420 } 421 422 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 423 i = 66; /* Everything is fine */ 424 425 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 426 i = 66; /* Everything is fine */ 427 428 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 429 memmove(buf, buf + i - 22, 22); /* Move data */ 430 i = 66; /* Carry on */ 431 } 432 } 433 434 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 435 436 sw->fail = 0; 437 sw->ok++; 438 439 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 440 && sw->ok > SW_OK) { 441 442 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 443 " - enabling optimization again.\n", sw->gameport->phys); 444 sw->length = 22; 445 } 446 447 return 0; 448 } 449 450 sw->ok = 0; 451 sw->fail++; 452 453 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 454 455 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 456 " - disabling optimization.\n", sw->gameport->phys); 457 sw->length = 66; 458 } 459 460 if (sw->fail < SW_FAIL) 461 return -1; /* Not enough, don't reinitialize yet */ 462 463 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 464 " - reinitializing joystick.\n", sw->gameport->phys); 465 466 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 467 mdelay(3 * SW_TIMEOUT); 468 sw_init_digital(sw->gameport); 469 } 470 471 mdelay(SW_TIMEOUT); 472 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 473 mdelay(SW_TIMEOUT); 474 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 475 476 sw->fail = SW_FAIL; 477 478 return -1; 479} 480 481static void sw_poll(struct gameport *gameport) 482{ 483 struct sw *sw = gameport_get_drvdata(gameport); 484 485 sw->reads++; 486 if (sw_read(sw)) 487 sw->bads++; 488} 489 490static int sw_open(struct input_dev *dev) 491{ 492 struct sw *sw = input_get_drvdata(dev); 493 494 gameport_start_polling(sw->gameport); 495 return 0; 496} 497 498static void sw_close(struct input_dev *dev) 499{ 500 struct sw *sw = input_get_drvdata(dev); 501 502 gameport_stop_polling(sw->gameport); 503} 504 505/* 506 * sw_print_packet() prints the contents of a SideWinder packet. 507 */ 508 509static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 510{ 511 int i; 512 513 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 514 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 515 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 516 printk("]\n"); 517} 518 519/* 520 * sw_3dp_id() translates the 3DP id into a human legible string. 521 * Unfortunately I don't know how to do this for the other SW types. 522 */ 523 524static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) 525{ 526 int i; 527 char pnp[8], rev[9]; 528 529 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 530 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 531 532 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 533 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 534 535 pnp[7] = rev[8] = 0; 536 537 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", 538 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 539 sw_get_bits(buf, 16, 6, 1)) / 100, 540 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 541 sw_get_bits(buf, 16, 6, 1)) % 100, 542 pnp, rev); 543} 544 545/* 546 * sw_guess_mode() checks the upper two button bits for toggling - 547 * indication of that the joystick is in 3-bit mode. This is documented 548 * behavior for 3DP ID packet, and for example the FSP does this in 549 * normal packets instead. Fun ... 550 */ 551 552static int sw_guess_mode(unsigned char *buf, int len) 553{ 554 int i; 555 unsigned char xor = 0; 556 557 for (i = 1; i < len; i++) 558 xor |= (buf[i - 1] ^ buf[i]) & 6; 559 560 return !!xor * 2 + 1; 561} 562 563/* 564 * sw_connect() probes for SideWinder type joysticks. 565 */ 566 567static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 568{ 569 struct sw *sw; 570 struct input_dev *input_dev; 571 int i, j, k, l; 572 int err = 0; 573 unsigned char *buf = NULL; /* [SW_LENGTH] */ 574 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 575 unsigned char m = 1; 576 char comment[40]; 577 578 comment[0] = 0; 579 580 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 581 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 582 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 583 if (!sw || !buf || !idbuf) { 584 err = -ENOMEM; 585 goto fail1; 586 } 587 588 sw->gameport = gameport; 589 590 gameport_set_drvdata(gameport, sw); 591 592 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 593 if (err) 594 goto fail1; 595 596 dbg("Init 0: Opened %s, io %#x, speed %d", 597 gameport->phys, gameport->io, gameport->speed); 598 599 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 600 msleep(SW_TIMEOUT); 601 dbg("Init 1: Mode %d. Length %d.", m , i); 602 603 if (!i) { /* No data. 3d Pro analog mode? */ 604 sw_init_digital(gameport); /* Switch to digital */ 605 msleep(SW_TIMEOUT); 606 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 607 msleep(SW_TIMEOUT); 608 dbg("Init 1b: Length %d.", i); 609 if (!i) { /* No data -> FAIL */ 610 err = -ENODEV; 611 goto fail2; 612 } 613 } 614 615 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 616 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 617 dbg("Init 2: Mode %d. ID Length %d.", m, j); 618 619 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 620 msleep(SW_TIMEOUT); 621 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 622 m |= sw_guess_mode(buf, i); 623 dbg("Init 2b: Mode %d. Length %d.", m, i); 624 if (!i) { 625 err = -ENODEV; 626 goto fail2; 627 } 628 msleep(SW_TIMEOUT); 629 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 630 dbg("Init 2c: ID Length %d.", j); 631 } 632 633 sw->type = -1; 634 k = SW_FAIL; /* Try SW_FAIL times */ 635 l = 0; 636 637 do { 638 k--; 639 msleep(SW_TIMEOUT); 640 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 641 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 642 643 if (i > l) { /* Longer? As we can only lose bits, it makes */ 644 /* no sense to try detection for a packet shorter */ 645 l = i; /* than the previous one */ 646 647 sw->number = 1; 648 sw->gameport = gameport; 649 sw->length = i; 650 sw->bits = m; 651 652 dbg("Init 3a: Case %d.\n", i * m); 653 654 switch (i * m) { 655 case 60: 656 sw->number++; 657 fallthrough; 658 case 45: /* Ambiguous packet length */ 659 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 660 fallthrough; 661 case 43: 662 sw->type = SW_ID_FSP; 663 break; 664 } 665 sw->number++; 666 fallthrough; 667 case 30: 668 sw->number++; 669 fallthrough; 670 case 15: 671 sw->type = SW_ID_GP; 672 break; 673 case 33: 674 case 31: 675 sw->type = SW_ID_FFW; 676 break; 677 case 48: /* Ambiguous */ 678 if (j == 14) { /* ID length 14*3 -> FFP */ 679 sw->type = SW_ID_FFP; 680 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 681 } else 682 sw->type = SW_ID_PP; 683 break; 684 case 66: 685 sw->bits = 3; 686 fallthrough; 687 case 198: 688 sw->length = 22; 689 fallthrough; 690 case 64: 691 sw->type = SW_ID_3DP; 692 if (j == 160) 693 sw_3dp_id(idbuf, comment, sizeof(comment)); 694 break; 695 } 696 } 697 698 } while (k && sw->type == -1); 699 700 if (sw->type == -1) { 701 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 702 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 703 sw_print_packet("ID", j * 3, idbuf, 3); 704 sw_print_packet("Data", i * m, buf, m); 705 err = -ENODEV; 706 goto fail2; 707 } 708 709#ifdef SW_DEBUG 710 sw_print_packet("ID", j * 3, idbuf, 3); 711 sw_print_packet("Data", i * m, buf, m); 712#endif 713 714 gameport_set_poll_handler(gameport, sw_poll); 715 gameport_set_poll_interval(gameport, 20); 716 717 k = i; 718 l = j; 719 720 for (i = 0; i < sw->number; i++) { 721 int bits, code; 722 723 snprintf(sw->name, sizeof(sw->name), 724 "Microsoft SideWinder %s", sw_name[sw->type]); 725 snprintf(sw->phys[i], sizeof(sw->phys[i]), 726 "%s/input%d", gameport->phys, i); 727 728 sw->dev[i] = input_dev = input_allocate_device(); 729 if (!input_dev) { 730 err = -ENOMEM; 731 goto fail3; 732 } 733 734 input_dev->name = sw->name; 735 input_dev->phys = sw->phys[i]; 736 input_dev->id.bustype = BUS_GAMEPORT; 737 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 738 input_dev->id.product = sw->type; 739 input_dev->id.version = 0x0100; 740 input_dev->dev.parent = &gameport->dev; 741 742 input_set_drvdata(input_dev, sw); 743 744 input_dev->open = sw_open; 745 input_dev->close = sw_close; 746 747 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 748 749 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 750 int min, max, fuzz, flat; 751 752 code = sw_abs[sw->type][j]; 753 min = bits == 1 ? -1 : 0; 754 max = (1 << bits) - 1; 755 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; 756 flat = code == ABS_THROTTLE || bits < 5 ? 757 0 : 1 << (bits - 5); 758 759 input_set_abs_params(input_dev, code, 760 min, max, fuzz, flat); 761 } 762 763 for (j = 0; (code = sw_btn[sw->type][j]); j++) 764 __set_bit(code, input_dev->keybit); 765 766 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); 767 768 err = input_register_device(sw->dev[i]); 769 if (err) 770 goto fail4; 771 } 772 773 out: kfree(buf); 774 kfree(idbuf); 775 776 return err; 777 778 fail4: input_free_device(sw->dev[i]); 779 fail3: while (--i >= 0) 780 input_unregister_device(sw->dev[i]); 781 fail2: gameport_close(gameport); 782 fail1: gameport_set_drvdata(gameport, NULL); 783 kfree(sw); 784 goto out; 785} 786 787static void sw_disconnect(struct gameport *gameport) 788{ 789 struct sw *sw = gameport_get_drvdata(gameport); 790 int i; 791 792 for (i = 0; i < sw->number; i++) 793 input_unregister_device(sw->dev[i]); 794 gameport_close(gameport); 795 gameport_set_drvdata(gameport, NULL); 796 kfree(sw); 797} 798 799static struct gameport_driver sw_drv = { 800 .driver = { 801 .name = "sidewinder", 802 .owner = THIS_MODULE, 803 }, 804 .description = DRIVER_DESC, 805 .connect = sw_connect, 806 .disconnect = sw_disconnect, 807}; 808 809module_gameport_driver(sw_drv); 810