1 /* 2 * Copyright (c) 1998-2005 Vojtech Pavlik 3 */ 4 5 /* 6 * Microsoft SideWinder joystick family driver for Linux 7 */ 8 9 /* 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 * Should you need to contact me, the author, you can do so either by 25 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 26 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 27 */ 28 29 #include <linux/delay.h> 30 #include <linux/kernel.h> 31 #include <linux/module.h> 32 #include <linux/slab.h> 33 #include <linux/init.h> 34 #include <linux/input.h> 35 #include <linux/gameport.h> 36 37 #define DRIVER_DESC "Microsoft SideWinder joystick family driver" 38 39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40 MODULE_DESCRIPTION(DRIVER_DESC); 41 MODULE_LICENSE("GPL"); 42 43 /* 44 * These are really magic values. Changing them can make a problem go away, 45 * as well as break everything. 46 */ 47 48 #undef SW_DEBUG 49 #undef SW_DEBUG_DATA 50 51 #define SW_START 600 /* The time we wait for the first bit [600 us] */ 52 #define SW_STROBE 60 /* Max time per bit [60 us] */ 53 #define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ 54 #define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ 55 #define SW_END 8 /* Number of bits before end of packet to kick */ 56 #define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ 57 #define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ 58 #define SW_OK 64 /* Number of packet read successes to switch optimization back on */ 59 #define SW_LENGTH 512 /* Max number of bits in a packet */ 60 61 #ifdef SW_DEBUG 62 #define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) 63 #else 64 #define dbg(format, arg...) do {} while (0) 65 #endif 66 67 /* 68 * SideWinder joystick types ... 69 */ 70 71 #define SW_ID_3DP 0 72 #define SW_ID_GP 1 73 #define SW_ID_PP 2 74 #define SW_ID_FFP 3 75 #define SW_ID_FSP 4 76 #define SW_ID_FFW 5 77 78 /* 79 * Names, buttons, axes ... 80 */ 81 82 static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", 83 "Force Feedback Wheel" }; 84 85 static char sw_abs[][7] = { 86 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 87 { ABS_X, ABS_Y }, 88 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 89 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 90 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 91 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; 92 93 static char sw_bit[][7] = { 94 { 10, 10, 9, 10, 1, 1 }, 95 { 1, 1 }, 96 { 10, 10, 6, 7, 1, 1 }, 97 { 10, 10, 6, 7, 1, 1 }, 98 { 10, 10, 6, 1, 1 }, 99 { 10, 7, 7, 1, 1 }}; 100 101 static short sw_btn[][12] = { 102 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, 103 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, 104 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 105 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 106 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, 107 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; 108 109 static struct { 110 int x; 111 int y; 112 } sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 113 114 struct sw { 115 struct gameport *gameport; 116 struct input_dev dev[4]; 117 char name[64]; 118 char phys[4][32]; 119 int length; 120 int type; 121 int bits; 122 int number; 123 int fail; 124 int ok; 125 int reads; 126 int bads; 127 }; 128 129 /* 130 * sw_read_packet() is a function which reads either a data packet, or an 131 * identification packet from a SideWinder joystick. The protocol is very, 132 * very, very braindamaged. Microsoft patented it in US patent #5628686. 133 */ 134 135 static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) 136 { 137 unsigned long flags; 138 int timeout, bitout, sched, i, kick, start, strobe; 139 unsigned char pending, u, v; 140 141 i = -id; /* Don't care about data, only want ID */ 142 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ 143 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ 144 start = gameport_time(gameport, SW_START); 145 strobe = gameport_time(gameport, SW_STROBE); 146 bitout = start; 147 pending = 0; 148 sched = 0; 149 150 local_irq_save(flags); /* Quiet, please */ 151 152 gameport_trigger(gameport); /* Trigger */ 153 v = gameport_read(gameport); 154 155 do { 156 bitout--; 157 u = v; 158 v = gameport_read(gameport); 159 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ 160 161 if (bitout > 0) 162 bitout = strobe; /* Extend time if not timed out */ 163 164 while ((timeout > 0 || bitout > 0) && (i < length)) { 165 166 timeout--; 167 bitout--; /* Decrement timers */ 168 sched--; 169 170 u = v; 171 v = gameport_read(gameport); 172 173 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ 174 if (i >= 0) /* Want this data */ 175 buf[i] = v >> 5; /* Store it */ 176 i++; /* Advance index */ 177 bitout = strobe; /* Extend timeout for next bit */ 178 } 179 180 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ 181 sched = kick; /* Schedule second trigger */ 182 kick = 0; /* Don't schedule next time on falling edge */ 183 pending = 1; /* Mark schedule */ 184 } 185 186 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ 187 gameport_trigger(gameport); /* Trigger */ 188 bitout = start; /* Long bit timeout */ 189 pending = 0; /* Unmark schedule */ 190 timeout = 0; /* Switch from global to bit timeouts */ 191 } 192 } 193 194 local_irq_restore(flags); /* Done - relax */ 195 196 #ifdef SW_DEBUG_DATA 197 { 198 int j; 199 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); 200 for (j = 0; j < i; j++) printk("%d", buf[j]); 201 printk("]\n"); 202 } 203 #endif 204 205 return i; 206 } 207 208 /* 209 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. 210 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 211 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 212 * is number of bits per triplet. 213 */ 214 215 #define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) 216 217 static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) 218 { 219 __u64 data = 0; 220 int tri = pos % bits; /* Start position */ 221 int i = pos / bits; 222 int bit = 0; 223 224 while (num--) { 225 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ 226 if (tri == bits) { 227 i++; /* Next triplet */ 228 tri = 0; 229 } 230 } 231 232 return data; 233 } 234 235 /* 236 * sw_init_digital() initializes a SideWinder 3D Pro joystick 237 * into digital mode. 238 */ 239 240 static void sw_init_digital(struct gameport *gameport) 241 { 242 int seq[] = { 140, 140+725, 140+300, 0 }; 243 unsigned long flags; 244 int i, t; 245 246 local_irq_save(flags); 247 248 i = 0; 249 do { 250 gameport_trigger(gameport); /* Trigger */ 251 t = gameport_time(gameport, SW_TIMEOUT * 1000); 252 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ 253 udelay(seq[i]); /* Delay magic time */ 254 } while (seq[++i]); 255 256 gameport_trigger(gameport); /* Last trigger */ 257 258 local_irq_restore(flags); 259 } 260 261 /* 262 * sw_parity() computes parity of __u64 263 */ 264 265 static int sw_parity(__u64 t) 266 { 267 int x = t ^ (t >> 32); 268 269 x ^= x >> 16; 270 x ^= x >> 8; 271 x ^= x >> 4; 272 x ^= x >> 2; 273 x ^= x >> 1; 274 return x & 1; 275 } 276 277 /* 278 * sw_ccheck() checks synchronization bits and computes checksum of nibbles. 279 */ 280 281 static int sw_check(__u64 t) 282 { 283 unsigned char sum = 0; 284 285 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ 286 return -1; 287 288 while (t) { /* Sum */ 289 sum += t & 0xf; 290 t >>= 4; 291 } 292 293 return sum & 0xf; 294 } 295 296 /* 297 * sw_parse() analyzes SideWinder joystick data, and writes the results into 298 * the axes and buttons arrays. 299 */ 300 301 static int sw_parse(unsigned char *buf, struct sw *sw) 302 { 303 int hat, i, j; 304 struct input_dev *dev = sw->dev; 305 306 switch (sw->type) { 307 308 case SW_ID_3DP: 309 310 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) 311 return -1; 312 313 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 314 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 315 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 316 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 317 318 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 319 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 320 321 for (j = 0; j < 7; j++) 322 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 323 324 input_report_key(dev, BTN_BASE4, !GB(38,1)); 325 input_report_key(dev, BTN_BASE5, !GB(37,1)); 326 327 input_sync(dev); 328 329 return 0; 330 331 case SW_ID_GP: 332 333 for (i = 0; i < sw->number; i ++) { 334 335 if (sw_parity(GB(i*15,15))) 336 return -1; 337 338 input_report_abs(dev + i, ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 339 input_report_abs(dev + i, ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 340 341 for (j = 0; j < 10; j++) 342 input_report_key(dev + i, sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 343 344 input_sync(dev + i); 345 } 346 347 return 0; 348 349 case SW_ID_PP: 350 case SW_ID_FFP: 351 352 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 353 return -1; 354 355 input_report_abs(dev, ABS_X, GB( 9,10)); 356 input_report_abs(dev, ABS_Y, GB(19,10)); 357 input_report_abs(dev, ABS_RZ, GB(36, 6)); 358 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 359 360 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 361 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 362 363 for (j = 0; j < 9; j++) 364 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 365 366 input_sync(dev); 367 368 return 0; 369 370 case SW_ID_FSP: 371 372 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 373 return -1; 374 375 input_report_abs(dev, ABS_X, GB( 0,10)); 376 input_report_abs(dev, ABS_Y, GB(16,10)); 377 input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); 378 379 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 380 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 381 382 for (j = 0; j < 6; j++) 383 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); 384 385 input_report_key(dev, BTN_TR, !GB(26,1)); 386 input_report_key(dev, BTN_START, !GB(27,1)); 387 input_report_key(dev, BTN_MODE, !GB(38,1)); 388 input_report_key(dev, BTN_SELECT, !GB(39,1)); 389 390 input_sync(dev); 391 392 return 0; 393 394 case SW_ID_FFW: 395 396 if (!sw_parity(GB(0,33))) 397 return -1; 398 399 input_report_abs(dev, ABS_RX, GB( 0,10)); 400 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 401 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 402 403 for (j = 0; j < 8; j++) 404 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 405 406 input_sync(dev); 407 408 return 0; 409 } 410 411 return -1; 412 } 413 414 /* 415 * sw_read() reads SideWinder joystick data, and reinitializes 416 * the joystick in case of persistent problems. This is the function that is 417 * called from the generic code to poll the joystick. 418 */ 419 420 static int sw_read(struct sw *sw) 421 { 422 unsigned char buf[SW_LENGTH]; 423 int i; 424 425 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 426 427 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 428 429 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 430 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 431 " - going to reinitialize.\n", sw->gameport->phys); 432 sw->fail = SW_FAIL; /* Reinitialize */ 433 i = 128; /* Bogus value */ 434 } 435 436 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 437 i = 66; /* Everything is fine */ 438 439 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 440 i = 66; /* Everything is fine */ 441 442 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 443 memmove(buf, buf + i - 22, 22); /* Move data */ 444 i = 66; /* Carry on */ 445 } 446 } 447 448 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 449 450 sw->fail = 0; 451 sw->ok++; 452 453 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 454 && sw->ok > SW_OK) { 455 456 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 457 " - enabling optimization again.\n", sw->gameport->phys); 458 sw->length = 22; 459 } 460 461 return 0; 462 } 463 464 sw->ok = 0; 465 sw->fail++; 466 467 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 468 469 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 470 " - disabling optimization.\n", sw->gameport->phys); 471 sw->length = 66; 472 } 473 474 if (sw->fail < SW_FAIL) 475 return -1; /* Not enough, don't reinitialize yet */ 476 477 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 478 " - reinitializing joystick.\n", sw->gameport->phys); 479 480 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 481 mdelay(3 * SW_TIMEOUT); 482 sw_init_digital(sw->gameport); 483 } 484 485 mdelay(SW_TIMEOUT); 486 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 487 mdelay(SW_TIMEOUT); 488 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 489 490 sw->fail = SW_FAIL; 491 492 return -1; 493 } 494 495 static void sw_poll(struct gameport *gameport) 496 { 497 struct sw *sw = gameport_get_drvdata(gameport); 498 499 sw->reads++; 500 if (sw_read(sw)) 501 sw->bads++; 502 } 503 504 static int sw_open(struct input_dev *dev) 505 { 506 struct sw *sw = dev->private; 507 508 gameport_start_polling(sw->gameport); 509 return 0; 510 } 511 512 static void sw_close(struct input_dev *dev) 513 { 514 struct sw *sw = dev->private; 515 516 gameport_stop_polling(sw->gameport); 517 } 518 519 /* 520 * sw_print_packet() prints the contents of a SideWinder packet. 521 */ 522 523 static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 524 { 525 int i; 526 527 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 528 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 529 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 530 printk("]\n"); 531 } 532 533 /* 534 * sw_3dp_id() translates the 3DP id into a human legible string. 535 * Unfortunately I don't know how to do this for the other SW types. 536 */ 537 538 static void sw_3dp_id(unsigned char *buf, char *comment) 539 { 540 int i; 541 char pnp[8], rev[9]; 542 543 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 544 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 545 546 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 547 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 548 549 pnp[7] = rev[8] = 0; 550 551 sprintf(comment, " [PnP %d.%02d id %s rev %s]", 552 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 553 sw_get_bits(buf, 16, 6, 1)) / 100, 554 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 555 sw_get_bits(buf, 16, 6, 1)) % 100, 556 pnp, rev); 557 } 558 559 /* 560 * sw_guess_mode() checks the upper two button bits for toggling - 561 * indication of that the joystick is in 3-bit mode. This is documented 562 * behavior for 3DP ID packet, and for example the FSP does this in 563 * normal packets instead. Fun ... 564 */ 565 566 static int sw_guess_mode(unsigned char *buf, int len) 567 { 568 int i; 569 unsigned char xor = 0; 570 571 for (i = 1; i < len; i++) 572 xor |= (buf[i - 1] ^ buf[i]) & 6; 573 574 return !!xor * 2 + 1; 575 } 576 577 /* 578 * sw_connect() probes for SideWinder type joysticks. 579 */ 580 581 static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 582 { 583 struct sw *sw; 584 int i, j, k, l; 585 int err; 586 unsigned char *buf = NULL; /* [SW_LENGTH] */ 587 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 588 unsigned char m = 1; 589 char comment[40]; 590 591 comment[0] = 0; 592 593 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 594 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 595 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 596 if (!sw || !buf || !idbuf) { 597 err = -ENOMEM; 598 goto fail1; 599 } 600 601 sw->gameport = gameport; 602 603 gameport_set_drvdata(gameport, sw); 604 605 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 606 if (err) 607 goto fail1; 608 609 dbg("Init 0: Opened %s, io %#x, speed %d", 610 gameport->phys, gameport->io, gameport->speed); 611 612 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 613 msleep(SW_TIMEOUT); 614 dbg("Init 1: Mode %d. Length %d.", m , i); 615 616 if (!i) { /* No data. 3d Pro analog mode? */ 617 sw_init_digital(gameport); /* Switch to digital */ 618 msleep(SW_TIMEOUT); 619 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 620 msleep(SW_TIMEOUT); 621 dbg("Init 1b: Length %d.", i); 622 if (!i) { /* No data -> FAIL */ 623 err = -ENODEV; 624 goto fail2; 625 } 626 } 627 628 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 629 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 630 dbg("Init 2: Mode %d. ID Length %d.", m, j); 631 632 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 633 msleep(SW_TIMEOUT); 634 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 635 m |= sw_guess_mode(buf, i); 636 dbg("Init 2b: Mode %d. Length %d.", m, i); 637 if (!i) { 638 err = -ENODEV; 639 goto fail2; 640 } 641 msleep(SW_TIMEOUT); 642 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 643 dbg("Init 2c: ID Length %d.", j); 644 } 645 646 sw->type = -1; 647 k = SW_FAIL; /* Try SW_FAIL times */ 648 l = 0; 649 650 do { 651 k--; 652 msleep(SW_TIMEOUT); 653 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 654 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 655 656 if (i > l) { /* Longer? As we can only lose bits, it makes */ 657 /* no sense to try detection for a packet shorter */ 658 l = i; /* than the previous one */ 659 660 sw->number = 1; 661 sw->gameport = gameport; 662 sw->length = i; 663 sw->bits = m; 664 665 dbg("Init 3a: Case %d.\n", i * m); 666 667 switch (i * m) { 668 case 60: 669 sw->number++; 670 case 45: /* Ambiguous packet length */ 671 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 672 case 43: 673 sw->type = SW_ID_FSP; 674 break; 675 } 676 sw->number++; 677 case 30: 678 sw->number++; 679 case 15: 680 sw->type = SW_ID_GP; 681 break; 682 case 33: 683 case 31: 684 sw->type = SW_ID_FFW; 685 break; 686 case 48: /* Ambiguous */ 687 if (j == 14) { /* ID length 14*3 -> FFP */ 688 sw->type = SW_ID_FFP; 689 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 690 } else 691 sw->type = SW_ID_PP; 692 break; 693 case 66: 694 sw->bits = 3; 695 case 198: 696 sw->length = 22; 697 case 64: 698 sw->type = SW_ID_3DP; 699 if (j == 160) sw_3dp_id(idbuf, comment); 700 break; 701 } 702 } 703 704 } while (k && sw->type == -1); 705 706 if (sw->type == -1) { 707 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 708 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 709 sw_print_packet("ID", j * 3, idbuf, 3); 710 sw_print_packet("Data", i * m, buf, m); 711 err = -ENODEV; 712 goto fail2; 713 } 714 715 #ifdef SW_DEBUG 716 sw_print_packet("ID", j * 3, idbuf, 3); 717 sw_print_packet("Data", i * m, buf, m); 718 #endif 719 720 gameport_set_poll_handler(gameport, sw_poll); 721 gameport_set_poll_interval(gameport, 20); 722 723 k = i; 724 l = j; 725 726 for (i = 0; i < sw->number; i++) { 727 int bits, code; 728 729 sprintf(sw->name, "Microsoft SideWinder %s", sw_name[sw->type]); 730 sprintf(sw->phys[i], "%s/input%d", gameport->phys, i); 731 732 sw->dev[i].private = sw; 733 734 sw->dev[i].open = sw_open; 735 sw->dev[i].close = sw_close; 736 737 sw->dev[i].name = sw->name; 738 sw->dev[i].phys = sw->phys[i]; 739 sw->dev[i].id.bustype = BUS_GAMEPORT; 740 sw->dev[i].id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 741 sw->dev[i].id.product = sw->type; 742 sw->dev[i].id.version = 0x0100; 743 744 sw->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); 745 746 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 747 code = sw_abs[sw->type][j]; 748 set_bit(code, sw->dev[i].absbit); 749 sw->dev[i].absmax[code] = (1 << bits) - 1; 750 sw->dev[i].absmin[code] = (bits == 1) ? -1 : 0; 751 sw->dev[i].absfuzz[code] = ((bits >> 1) >= 2) ? (1 << ((bits >> 1) - 2)) : 0; 752 if (code != ABS_THROTTLE) 753 sw->dev[i].absflat[code] = (bits >= 5) ? (1 << (bits - 5)) : 0; 754 } 755 756 for (j = 0; (code = sw_btn[sw->type][j]); j++) 757 set_bit(code, sw->dev[i].keybit); 758 759 input_register_device(sw->dev + i); 760 printk(KERN_INFO "input: %s%s on %s [%d-bit id %d data %d]\n", 761 sw->name, comment, gameport->phys, m, l, k); 762 } 763 764 return 0; 765 766 fail2: gameport_close(gameport); 767 fail1: gameport_set_drvdata(gameport, NULL); 768 kfree(sw); 769 kfree(buf); 770 kfree(idbuf); 771 return err; 772 } 773 774 static void sw_disconnect(struct gameport *gameport) 775 { 776 struct sw *sw = gameport_get_drvdata(gameport); 777 int i; 778 779 for (i = 0; i < sw->number; i++) 780 input_unregister_device(sw->dev + i); 781 gameport_close(gameport); 782 gameport_set_drvdata(gameport, NULL); 783 kfree(sw); 784 } 785 786 static struct gameport_driver sw_drv = { 787 .driver = { 788 .name = "sidewinder", 789 }, 790 .description = DRIVER_DESC, 791 .connect = sw_connect, 792 .disconnect = sw_disconnect, 793 }; 794 795 static int __init sw_init(void) 796 { 797 gameport_register_driver(&sw_drv); 798 return 0; 799 } 800 801 static void __exit sw_exit(void) 802 { 803 gameport_unregister_driver(&sw_drv); 804 } 805 806 module_init(sw_init); 807 module_exit(sw_exit); 808