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 /* 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/input.h> 18 #include <linux/gameport.h> 19 #include <linux/jiffies.h> 20 21 #define DRIVER_DESC "Microsoft SideWinder joystick family driver" 22 23 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 24 MODULE_DESCRIPTION(DRIVER_DESC); 25 MODULE_LICENSE("GPL"); 26 27 /* 28 * These are really magic values. Changing them can make a problem go away, 29 * as well as break everything. 30 */ 31 32 #undef SW_DEBUG 33 #undef SW_DEBUG_DATA 34 35 #define SW_START 600 /* The time we wait for the first bit [600 us] */ 36 #define SW_STROBE 60 /* Max time per bit [60 us] */ 37 #define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ 38 #define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ 39 #define SW_END 8 /* Number of bits before end of packet to kick */ 40 #define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ 41 #define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ 42 #define SW_OK 64 /* Number of packet read successes to switch optimization back on */ 43 #define SW_LENGTH 512 /* Max number of bits in a packet */ 44 45 #ifdef SW_DEBUG 46 #define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) 47 #else 48 #define dbg(format, arg...) do {} while (0) 49 #endif 50 51 /* 52 * SideWinder joystick types ... 53 */ 54 55 #define SW_ID_3DP 0 56 #define SW_ID_GP 1 57 #define SW_ID_PP 2 58 #define SW_ID_FFP 3 59 #define SW_ID_FSP 4 60 #define SW_ID_FFW 5 61 62 /* 63 * Names, buttons, axes ... 64 */ 65 66 static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", 67 "Force Feedback Wheel" }; 68 69 static char sw_abs[][7] = { 70 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 71 { ABS_X, ABS_Y }, 72 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 73 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 74 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 75 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; 76 77 static char sw_bit[][7] = { 78 { 10, 10, 9, 10, 1, 1 }, 79 { 1, 1 }, 80 { 10, 10, 6, 7, 1, 1 }, 81 { 10, 10, 6, 7, 1, 1 }, 82 { 10, 10, 6, 1, 1 }, 83 { 10, 7, 7, 1, 1 }}; 84 85 static short sw_btn[][12] = { 86 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, 87 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, 88 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 89 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 90 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, 91 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; 92 93 static struct { 94 int x; 95 int y; 96 } sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 97 98 struct sw { 99 struct gameport *gameport; 100 struct input_dev *dev[4]; 101 char name[64]; 102 char phys[4][32]; 103 int length; 104 int type; 105 int bits; 106 int number; 107 int fail; 108 int ok; 109 int reads; 110 int bads; 111 }; 112 113 /* 114 * sw_read_packet() is a function which reads either a data packet, or an 115 * identification packet from a SideWinder joystick. The protocol is very, 116 * very, very braindamaged. Microsoft patented it in US patent #5628686. 117 */ 118 119 static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) 120 { 121 unsigned long flags; 122 int timeout, bitout, sched, i, kick, start, strobe; 123 unsigned char pending, u, v; 124 125 i = -id; /* Don't care about data, only want ID */ 126 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ 127 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ 128 start = gameport_time(gameport, SW_START); 129 strobe = gameport_time(gameport, SW_STROBE); 130 bitout = start; 131 pending = 0; 132 sched = 0; 133 134 local_irq_save(flags); /* Quiet, please */ 135 136 gameport_trigger(gameport); /* Trigger */ 137 v = gameport_read(gameport); 138 139 do { 140 bitout--; 141 u = v; 142 v = gameport_read(gameport); 143 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ 144 145 if (bitout > 0) 146 bitout = strobe; /* Extend time if not timed out */ 147 148 while ((timeout > 0 || bitout > 0) && (i < length)) { 149 150 timeout--; 151 bitout--; /* Decrement timers */ 152 sched--; 153 154 u = v; 155 v = gameport_read(gameport); 156 157 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ 158 if (i >= 0) /* Want this data */ 159 buf[i] = v >> 5; /* Store it */ 160 i++; /* Advance index */ 161 bitout = strobe; /* Extend timeout for next bit */ 162 } 163 164 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ 165 sched = kick; /* Schedule second trigger */ 166 kick = 0; /* Don't schedule next time on falling edge */ 167 pending = 1; /* Mark schedule */ 168 } 169 170 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ 171 gameport_trigger(gameport); /* Trigger */ 172 bitout = start; /* Long bit timeout */ 173 pending = 0; /* Unmark schedule */ 174 timeout = 0; /* Switch from global to bit timeouts */ 175 } 176 } 177 178 local_irq_restore(flags); /* Done - relax */ 179 180 #ifdef SW_DEBUG_DATA 181 { 182 int j; 183 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); 184 for (j = 0; j < i; j++) printk("%d", buf[j]); 185 printk("]\n"); 186 } 187 #endif 188 189 return i; 190 } 191 192 /* 193 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. 194 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 195 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 196 * is number of bits per triplet. 197 */ 198 199 #define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) 200 201 static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) 202 { 203 __u64 data = 0; 204 int tri = pos % bits; /* Start position */ 205 int i = pos / bits; 206 int bit = 0; 207 208 while (num--) { 209 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ 210 if (tri == bits) { 211 i++; /* Next triplet */ 212 tri = 0; 213 } 214 } 215 216 return data; 217 } 218 219 /* 220 * sw_init_digital() initializes a SideWinder 3D Pro joystick 221 * into digital mode. 222 */ 223 224 static void sw_init_digital(struct gameport *gameport) 225 { 226 static const int seq[] = { 140, 140+725, 140+300, 0 }; 227 unsigned long flags; 228 int i, t; 229 230 local_irq_save(flags); 231 232 i = 0; 233 do { 234 gameport_trigger(gameport); /* Trigger */ 235 t = gameport_time(gameport, SW_TIMEOUT * 1000); 236 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ 237 udelay(seq[i]); /* Delay magic time */ 238 } while (seq[++i]); 239 240 gameport_trigger(gameport); /* Last trigger */ 241 242 local_irq_restore(flags); 243 } 244 245 /* 246 * sw_parity() computes parity of __u64 247 */ 248 249 static int sw_parity(__u64 t) 250 { 251 int x = t ^ (t >> 32); 252 253 x ^= x >> 16; 254 x ^= x >> 8; 255 x ^= x >> 4; 256 x ^= x >> 2; 257 x ^= x >> 1; 258 return x & 1; 259 } 260 261 /* 262 * sw_ccheck() checks synchronization bits and computes checksum of nibbles. 263 */ 264 265 static int sw_check(__u64 t) 266 { 267 unsigned char sum = 0; 268 269 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ 270 return -1; 271 272 while (t) { /* Sum */ 273 sum += t & 0xf; 274 t >>= 4; 275 } 276 277 return sum & 0xf; 278 } 279 280 /* 281 * sw_parse() analyzes SideWinder joystick data, and writes the results into 282 * the axes and buttons arrays. 283 */ 284 285 static int sw_parse(unsigned char *buf, struct sw *sw) 286 { 287 int hat, i, j; 288 struct input_dev *dev; 289 290 switch (sw->type) { 291 292 case SW_ID_3DP: 293 294 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) 295 return -1; 296 297 dev = sw->dev[0]; 298 299 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 300 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 301 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 302 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 303 304 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 305 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 306 307 for (j = 0; j < 7; j++) 308 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 309 310 input_report_key(dev, BTN_BASE4, !GB(38,1)); 311 input_report_key(dev, BTN_BASE5, !GB(37,1)); 312 313 input_sync(dev); 314 315 return 0; 316 317 case SW_ID_GP: 318 319 for (i = 0; i < sw->number; i ++) { 320 321 if (sw_parity(GB(i*15,15))) 322 return -1; 323 324 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 325 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 326 327 for (j = 0; j < 10; j++) 328 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 329 330 input_sync(sw->dev[i]); 331 } 332 333 return 0; 334 335 case SW_ID_PP: 336 case SW_ID_FFP: 337 338 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 339 return -1; 340 341 dev = sw->dev[0]; 342 input_report_abs(dev, ABS_X, GB( 9,10)); 343 input_report_abs(dev, ABS_Y, GB(19,10)); 344 input_report_abs(dev, ABS_RZ, GB(36, 6)); 345 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 346 347 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 348 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 349 350 for (j = 0; j < 9; j++) 351 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 352 353 input_sync(dev); 354 355 return 0; 356 357 case SW_ID_FSP: 358 359 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 360 return -1; 361 362 dev = sw->dev[0]; 363 input_report_abs(dev, ABS_X, GB( 0,10)); 364 input_report_abs(dev, ABS_Y, GB(16,10)); 365 input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); 366 367 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 368 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 369 370 for (j = 0; j < 6; j++) 371 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); 372 373 input_report_key(dev, BTN_TR, !GB(26,1)); 374 input_report_key(dev, BTN_START, !GB(27,1)); 375 input_report_key(dev, BTN_MODE, !GB(38,1)); 376 input_report_key(dev, BTN_SELECT, !GB(39,1)); 377 378 input_sync(dev); 379 380 return 0; 381 382 case SW_ID_FFW: 383 384 if (!sw_parity(GB(0,33))) 385 return -1; 386 387 dev = sw->dev[0]; 388 input_report_abs(dev, ABS_RX, GB( 0,10)); 389 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 390 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 391 392 for (j = 0; j < 8; j++) 393 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 394 395 input_sync(dev); 396 397 return 0; 398 } 399 400 return -1; 401 } 402 403 /* 404 * sw_read() reads SideWinder joystick data, and reinitializes 405 * the joystick in case of persistent problems. This is the function that is 406 * called from the generic code to poll the joystick. 407 */ 408 409 static int sw_read(struct sw *sw) 410 { 411 unsigned char buf[SW_LENGTH]; 412 int i; 413 414 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 415 416 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 417 418 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 419 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 420 " - going to reinitialize.\n", sw->gameport->phys); 421 sw->fail = SW_FAIL; /* Reinitialize */ 422 i = 128; /* Bogus value */ 423 } 424 425 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 426 i = 66; /* Everything is fine */ 427 428 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 429 i = 66; /* Everything is fine */ 430 431 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 432 memmove(buf, buf + i - 22, 22); /* Move data */ 433 i = 66; /* Carry on */ 434 } 435 } 436 437 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 438 439 sw->fail = 0; 440 sw->ok++; 441 442 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 443 && sw->ok > SW_OK) { 444 445 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 446 " - enabling optimization again.\n", sw->gameport->phys); 447 sw->length = 22; 448 } 449 450 return 0; 451 } 452 453 sw->ok = 0; 454 sw->fail++; 455 456 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 457 458 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 459 " - disabling optimization.\n", sw->gameport->phys); 460 sw->length = 66; 461 } 462 463 if (sw->fail < SW_FAIL) 464 return -1; /* Not enough, don't reinitialize yet */ 465 466 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 467 " - reinitializing joystick.\n", sw->gameport->phys); 468 469 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 470 mdelay(3 * SW_TIMEOUT); 471 sw_init_digital(sw->gameport); 472 } 473 474 mdelay(SW_TIMEOUT); 475 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 476 mdelay(SW_TIMEOUT); 477 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 478 479 sw->fail = SW_FAIL; 480 481 return -1; 482 } 483 484 static void sw_poll(struct gameport *gameport) 485 { 486 struct sw *sw = gameport_get_drvdata(gameport); 487 488 sw->reads++; 489 if (sw_read(sw)) 490 sw->bads++; 491 } 492 493 static int sw_open(struct input_dev *dev) 494 { 495 struct sw *sw = input_get_drvdata(dev); 496 497 gameport_start_polling(sw->gameport); 498 return 0; 499 } 500 501 static void sw_close(struct input_dev *dev) 502 { 503 struct sw *sw = input_get_drvdata(dev); 504 505 gameport_stop_polling(sw->gameport); 506 } 507 508 /* 509 * sw_print_packet() prints the contents of a SideWinder packet. 510 */ 511 512 static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 513 { 514 int i; 515 516 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 517 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 518 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 519 printk("]\n"); 520 } 521 522 /* 523 * sw_3dp_id() translates the 3DP id into a human legible string. 524 * Unfortunately I don't know how to do this for the other SW types. 525 */ 526 527 static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) 528 { 529 int i; 530 char pnp[8], rev[9]; 531 532 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 533 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 534 535 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 536 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 537 538 pnp[7] = rev[8] = 0; 539 540 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", 541 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 542 sw_get_bits(buf, 16, 6, 1)) / 100, 543 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 544 sw_get_bits(buf, 16, 6, 1)) % 100, 545 pnp, rev); 546 } 547 548 /* 549 * sw_guess_mode() checks the upper two button bits for toggling - 550 * indication of that the joystick is in 3-bit mode. This is documented 551 * behavior for 3DP ID packet, and for example the FSP does this in 552 * normal packets instead. Fun ... 553 */ 554 555 static int sw_guess_mode(unsigned char *buf, int len) 556 { 557 int i; 558 unsigned char xor = 0; 559 560 for (i = 1; i < len; i++) 561 xor |= (buf[i - 1] ^ buf[i]) & 6; 562 563 return !!xor * 2 + 1; 564 } 565 566 /* 567 * sw_connect() probes for SideWinder type joysticks. 568 */ 569 570 static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 571 { 572 struct sw *sw; 573 struct input_dev *input_dev; 574 int i, j, k, l; 575 int err = 0; 576 unsigned char *buf = NULL; /* [SW_LENGTH] */ 577 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 578 unsigned char m = 1; 579 char comment[40]; 580 581 comment[0] = 0; 582 583 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 584 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 585 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 586 if (!sw || !buf || !idbuf) { 587 err = -ENOMEM; 588 goto fail1; 589 } 590 591 sw->gameport = gameport; 592 593 gameport_set_drvdata(gameport, sw); 594 595 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 596 if (err) 597 goto fail1; 598 599 dbg("Init 0: Opened %s, io %#x, speed %d", 600 gameport->phys, gameport->io, gameport->speed); 601 602 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 603 msleep(SW_TIMEOUT); 604 dbg("Init 1: Mode %d. Length %d.", m , i); 605 606 if (!i) { /* No data. 3d Pro analog mode? */ 607 sw_init_digital(gameport); /* Switch to digital */ 608 msleep(SW_TIMEOUT); 609 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 610 msleep(SW_TIMEOUT); 611 dbg("Init 1b: Length %d.", i); 612 if (!i) { /* No data -> FAIL */ 613 err = -ENODEV; 614 goto fail2; 615 } 616 } 617 618 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 619 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 620 dbg("Init 2: Mode %d. ID Length %d.", m, j); 621 622 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 623 msleep(SW_TIMEOUT); 624 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 625 m |= sw_guess_mode(buf, i); 626 dbg("Init 2b: Mode %d. Length %d.", m, i); 627 if (!i) { 628 err = -ENODEV; 629 goto fail2; 630 } 631 msleep(SW_TIMEOUT); 632 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 633 dbg("Init 2c: ID Length %d.", j); 634 } 635 636 sw->type = -1; 637 k = SW_FAIL; /* Try SW_FAIL times */ 638 l = 0; 639 640 do { 641 k--; 642 msleep(SW_TIMEOUT); 643 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 644 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 645 646 if (i > l) { /* Longer? As we can only lose bits, it makes */ 647 /* no sense to try detection for a packet shorter */ 648 l = i; /* than the previous one */ 649 650 sw->number = 1; 651 sw->gameport = gameport; 652 sw->length = i; 653 sw->bits = m; 654 655 dbg("Init 3a: Case %d.\n", i * m); 656 657 switch (i * m) { 658 case 60: 659 sw->number++; 660 fallthrough; 661 case 45: /* Ambiguous packet length */ 662 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 663 fallthrough; 664 case 43: 665 sw->type = SW_ID_FSP; 666 break; 667 } 668 sw->number++; 669 fallthrough; 670 case 30: 671 sw->number++; 672 fallthrough; 673 case 15: 674 sw->type = SW_ID_GP; 675 break; 676 case 33: 677 case 31: 678 sw->type = SW_ID_FFW; 679 break; 680 case 48: /* Ambiguous */ 681 if (j == 14) { /* ID length 14*3 -> FFP */ 682 sw->type = SW_ID_FFP; 683 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 684 } else 685 sw->type = SW_ID_PP; 686 break; 687 case 66: 688 sw->bits = 3; 689 fallthrough; 690 case 198: 691 sw->length = 22; 692 fallthrough; 693 case 64: 694 sw->type = SW_ID_3DP; 695 if (j == 160) 696 sw_3dp_id(idbuf, comment, sizeof(comment)); 697 break; 698 } 699 } 700 701 } while (k && sw->type == -1); 702 703 if (sw->type == -1) { 704 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 705 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 706 sw_print_packet("ID", j * 3, idbuf, 3); 707 sw_print_packet("Data", i * m, buf, m); 708 err = -ENODEV; 709 goto fail2; 710 } 711 712 #ifdef SW_DEBUG 713 sw_print_packet("ID", j * 3, idbuf, 3); 714 sw_print_packet("Data", i * m, buf, m); 715 #endif 716 717 gameport_set_poll_handler(gameport, sw_poll); 718 gameport_set_poll_interval(gameport, 20); 719 720 k = i; 721 l = j; 722 723 for (i = 0; i < sw->number; i++) { 724 int bits, code; 725 726 snprintf(sw->name, sizeof(sw->name), 727 "Microsoft SideWinder %s", sw_name[sw->type]); 728 snprintf(sw->phys[i], sizeof(sw->phys[i]), 729 "%s/input%d", gameport->phys, i); 730 731 sw->dev[i] = input_dev = input_allocate_device(); 732 if (!input_dev) { 733 err = -ENOMEM; 734 goto fail3; 735 } 736 737 input_dev->name = sw->name; 738 input_dev->phys = sw->phys[i]; 739 input_dev->id.bustype = BUS_GAMEPORT; 740 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 741 input_dev->id.product = sw->type; 742 input_dev->id.version = 0x0100; 743 input_dev->dev.parent = &gameport->dev; 744 745 input_set_drvdata(input_dev, sw); 746 747 input_dev->open = sw_open; 748 input_dev->close = sw_close; 749 750 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 751 752 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 753 int min, max, fuzz, flat; 754 755 code = sw_abs[sw->type][j]; 756 min = bits == 1 ? -1 : 0; 757 max = (1 << bits) - 1; 758 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; 759 flat = code == ABS_THROTTLE || bits < 5 ? 760 0 : 1 << (bits - 5); 761 762 input_set_abs_params(input_dev, code, 763 min, max, fuzz, flat); 764 } 765 766 for (j = 0; (code = sw_btn[sw->type][j]); j++) 767 __set_bit(code, input_dev->keybit); 768 769 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); 770 771 err = input_register_device(sw->dev[i]); 772 if (err) 773 goto fail4; 774 } 775 776 out: kfree(buf); 777 kfree(idbuf); 778 779 return err; 780 781 fail4: input_free_device(sw->dev[i]); 782 fail3: while (--i >= 0) 783 input_unregister_device(sw->dev[i]); 784 fail2: gameport_close(gameport); 785 fail1: gameport_set_drvdata(gameport, NULL); 786 kfree(sw); 787 goto out; 788 } 789 790 static void sw_disconnect(struct gameport *gameport) 791 { 792 struct sw *sw = gameport_get_drvdata(gameport); 793 int i; 794 795 for (i = 0; i < sw->number; i++) 796 input_unregister_device(sw->dev[i]); 797 gameport_close(gameport); 798 gameport_set_drvdata(gameport, NULL); 799 kfree(sw); 800 } 801 802 static struct gameport_driver sw_drv = { 803 .driver = { 804 .name = "sidewinder", 805 .owner = THIS_MODULE, 806 }, 807 .description = DRIVER_DESC, 808 .connect = sw_connect, 809 .disconnect = sw_disconnect, 810 }; 811 812 module_gameport_driver(sw_drv); 813