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 25 #include <linux/delay.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/slab.h> 29 #include <linux/input.h> 30 #include <linux/gameport.h> 31 #include <linux/jiffies.h> 32 33 #define DRIVER_DESC "Microsoft SideWinder joystick family driver" 34 35 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 36 MODULE_DESCRIPTION(DRIVER_DESC); 37 MODULE_LICENSE("GPL"); 38 39 /* 40 * These are really magic values. Changing them can make a problem go away, 41 * as well as break everything. 42 */ 43 44 #undef SW_DEBUG 45 #undef SW_DEBUG_DATA 46 47 #define SW_START 600 /* The time we wait for the first bit [600 us] */ 48 #define SW_STROBE 60 /* Max time per bit [60 us] */ 49 #define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ 50 #define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ 51 #define SW_END 8 /* Number of bits before end of packet to kick */ 52 #define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ 53 #define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ 54 #define SW_OK 64 /* Number of packet read successes to switch optimization back on */ 55 #define SW_LENGTH 512 /* Max number of bits in a packet */ 56 57 #ifdef SW_DEBUG 58 #define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) 59 #else 60 #define dbg(format, arg...) do {} while (0) 61 #endif 62 63 /* 64 * SideWinder joystick types ... 65 */ 66 67 #define SW_ID_3DP 0 68 #define SW_ID_GP 1 69 #define SW_ID_PP 2 70 #define SW_ID_FFP 3 71 #define SW_ID_FSP 4 72 #define SW_ID_FFW 5 73 74 /* 75 * Names, buttons, axes ... 76 */ 77 78 static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", 79 "Force Feedback Wheel" }; 80 81 static char sw_abs[][7] = { 82 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 83 { ABS_X, ABS_Y }, 84 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 85 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 86 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 87 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; 88 89 static char sw_bit[][7] = { 90 { 10, 10, 9, 10, 1, 1 }, 91 { 1, 1 }, 92 { 10, 10, 6, 7, 1, 1 }, 93 { 10, 10, 6, 7, 1, 1 }, 94 { 10, 10, 6, 1, 1 }, 95 { 10, 7, 7, 1, 1 }}; 96 97 static short sw_btn[][12] = { 98 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, 99 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, 100 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 101 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 102 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, 103 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; 104 105 static struct { 106 int x; 107 int y; 108 } sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 109 110 struct sw { 111 struct gameport *gameport; 112 struct input_dev *dev[4]; 113 char name[64]; 114 char phys[4][32]; 115 int length; 116 int type; 117 int bits; 118 int number; 119 int fail; 120 int ok; 121 int reads; 122 int bads; 123 }; 124 125 /* 126 * sw_read_packet() is a function which reads either a data packet, or an 127 * identification packet from a SideWinder joystick. The protocol is very, 128 * very, very braindamaged. Microsoft patented it in US patent #5628686. 129 */ 130 131 static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) 132 { 133 unsigned long flags; 134 int timeout, bitout, sched, i, kick, start, strobe; 135 unsigned char pending, u, v; 136 137 i = -id; /* Don't care about data, only want ID */ 138 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ 139 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ 140 start = gameport_time(gameport, SW_START); 141 strobe = gameport_time(gameport, SW_STROBE); 142 bitout = start; 143 pending = 0; 144 sched = 0; 145 146 local_irq_save(flags); /* Quiet, please */ 147 148 gameport_trigger(gameport); /* Trigger */ 149 v = gameport_read(gameport); 150 151 do { 152 bitout--; 153 u = v; 154 v = gameport_read(gameport); 155 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ 156 157 if (bitout > 0) 158 bitout = strobe; /* Extend time if not timed out */ 159 160 while ((timeout > 0 || bitout > 0) && (i < length)) { 161 162 timeout--; 163 bitout--; /* Decrement timers */ 164 sched--; 165 166 u = v; 167 v = gameport_read(gameport); 168 169 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ 170 if (i >= 0) /* Want this data */ 171 buf[i] = v >> 5; /* Store it */ 172 i++; /* Advance index */ 173 bitout = strobe; /* Extend timeout for next bit */ 174 } 175 176 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ 177 sched = kick; /* Schedule second trigger */ 178 kick = 0; /* Don't schedule next time on falling edge */ 179 pending = 1; /* Mark schedule */ 180 } 181 182 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ 183 gameport_trigger(gameport); /* Trigger */ 184 bitout = start; /* Long bit timeout */ 185 pending = 0; /* Unmark schedule */ 186 timeout = 0; /* Switch from global to bit timeouts */ 187 } 188 } 189 190 local_irq_restore(flags); /* Done - relax */ 191 192 #ifdef SW_DEBUG_DATA 193 { 194 int j; 195 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); 196 for (j = 0; j < i; j++) printk("%d", buf[j]); 197 printk("]\n"); 198 } 199 #endif 200 201 return i; 202 } 203 204 /* 205 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. 206 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 207 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 208 * is number of bits per triplet. 209 */ 210 211 #define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) 212 213 static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) 214 { 215 __u64 data = 0; 216 int tri = pos % bits; /* Start position */ 217 int i = pos / bits; 218 int bit = 0; 219 220 while (num--) { 221 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ 222 if (tri == bits) { 223 i++; /* Next triplet */ 224 tri = 0; 225 } 226 } 227 228 return data; 229 } 230 231 /* 232 * sw_init_digital() initializes a SideWinder 3D Pro joystick 233 * into digital mode. 234 */ 235 236 static void sw_init_digital(struct gameport *gameport) 237 { 238 int seq[] = { 140, 140+725, 140+300, 0 }; 239 unsigned long flags; 240 int i, t; 241 242 local_irq_save(flags); 243 244 i = 0; 245 do { 246 gameport_trigger(gameport); /* Trigger */ 247 t = gameport_time(gameport, SW_TIMEOUT * 1000); 248 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ 249 udelay(seq[i]); /* Delay magic time */ 250 } while (seq[++i]); 251 252 gameport_trigger(gameport); /* Last trigger */ 253 254 local_irq_restore(flags); 255 } 256 257 /* 258 * sw_parity() computes parity of __u64 259 */ 260 261 static int sw_parity(__u64 t) 262 { 263 int x = t ^ (t >> 32); 264 265 x ^= x >> 16; 266 x ^= x >> 8; 267 x ^= x >> 4; 268 x ^= x >> 2; 269 x ^= x >> 1; 270 return x & 1; 271 } 272 273 /* 274 * sw_ccheck() checks synchronization bits and computes checksum of nibbles. 275 */ 276 277 static int sw_check(__u64 t) 278 { 279 unsigned char sum = 0; 280 281 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ 282 return -1; 283 284 while (t) { /* Sum */ 285 sum += t & 0xf; 286 t >>= 4; 287 } 288 289 return sum & 0xf; 290 } 291 292 /* 293 * sw_parse() analyzes SideWinder joystick data, and writes the results into 294 * the axes and buttons arrays. 295 */ 296 297 static int sw_parse(unsigned char *buf, struct sw *sw) 298 { 299 int hat, i, j; 300 struct input_dev *dev; 301 302 switch (sw->type) { 303 304 case SW_ID_3DP: 305 306 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) 307 return -1; 308 309 dev = sw->dev[0]; 310 311 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 312 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 313 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 314 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 315 316 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 317 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 318 319 for (j = 0; j < 7; j++) 320 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 321 322 input_report_key(dev, BTN_BASE4, !GB(38,1)); 323 input_report_key(dev, BTN_BASE5, !GB(37,1)); 324 325 input_sync(dev); 326 327 return 0; 328 329 case SW_ID_GP: 330 331 for (i = 0; i < sw->number; i ++) { 332 333 if (sw_parity(GB(i*15,15))) 334 return -1; 335 336 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 337 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 338 339 for (j = 0; j < 10; j++) 340 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 341 342 input_sync(sw->dev[i]); 343 } 344 345 return 0; 346 347 case SW_ID_PP: 348 case SW_ID_FFP: 349 350 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 351 return -1; 352 353 dev = sw->dev[0]; 354 input_report_abs(dev, ABS_X, GB( 9,10)); 355 input_report_abs(dev, ABS_Y, GB(19,10)); 356 input_report_abs(dev, ABS_RZ, GB(36, 6)); 357 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 358 359 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 360 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 361 362 for (j = 0; j < 9; j++) 363 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 364 365 input_sync(dev); 366 367 return 0; 368 369 case SW_ID_FSP: 370 371 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 372 return -1; 373 374 dev = sw->dev[0]; 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 dev = sw->dev[0]; 400 input_report_abs(dev, ABS_RX, GB( 0,10)); 401 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 402 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 403 404 for (j = 0; j < 8; j++) 405 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 406 407 input_sync(dev); 408 409 return 0; 410 } 411 412 return -1; 413 } 414 415 /* 416 * sw_read() reads SideWinder joystick data, and reinitializes 417 * the joystick in case of persistent problems. This is the function that is 418 * called from the generic code to poll the joystick. 419 */ 420 421 static int sw_read(struct sw *sw) 422 { 423 unsigned char buf[SW_LENGTH]; 424 int i; 425 426 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 427 428 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 429 430 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 431 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 432 " - going to reinitialize.\n", sw->gameport->phys); 433 sw->fail = SW_FAIL; /* Reinitialize */ 434 i = 128; /* Bogus value */ 435 } 436 437 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 438 i = 66; /* Everything is fine */ 439 440 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 441 i = 66; /* Everything is fine */ 442 443 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 444 memmove(buf, buf + i - 22, 22); /* Move data */ 445 i = 66; /* Carry on */ 446 } 447 } 448 449 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 450 451 sw->fail = 0; 452 sw->ok++; 453 454 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 455 && sw->ok > SW_OK) { 456 457 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 458 " - enabling optimization again.\n", sw->gameport->phys); 459 sw->length = 22; 460 } 461 462 return 0; 463 } 464 465 sw->ok = 0; 466 sw->fail++; 467 468 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 469 470 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 471 " - disabling optimization.\n", sw->gameport->phys); 472 sw->length = 66; 473 } 474 475 if (sw->fail < SW_FAIL) 476 return -1; /* Not enough, don't reinitialize yet */ 477 478 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 479 " - reinitializing joystick.\n", sw->gameport->phys); 480 481 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 482 mdelay(3 * SW_TIMEOUT); 483 sw_init_digital(sw->gameport); 484 } 485 486 mdelay(SW_TIMEOUT); 487 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 488 mdelay(SW_TIMEOUT); 489 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 490 491 sw->fail = SW_FAIL; 492 493 return -1; 494 } 495 496 static void sw_poll(struct gameport *gameport) 497 { 498 struct sw *sw = gameport_get_drvdata(gameport); 499 500 sw->reads++; 501 if (sw_read(sw)) 502 sw->bads++; 503 } 504 505 static int sw_open(struct input_dev *dev) 506 { 507 struct sw *sw = input_get_drvdata(dev); 508 509 gameport_start_polling(sw->gameport); 510 return 0; 511 } 512 513 static void sw_close(struct input_dev *dev) 514 { 515 struct sw *sw = input_get_drvdata(dev); 516 517 gameport_stop_polling(sw->gameport); 518 } 519 520 /* 521 * sw_print_packet() prints the contents of a SideWinder packet. 522 */ 523 524 static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 525 { 526 int i; 527 528 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 529 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 530 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 531 printk("]\n"); 532 } 533 534 /* 535 * sw_3dp_id() translates the 3DP id into a human legible string. 536 * Unfortunately I don't know how to do this for the other SW types. 537 */ 538 539 static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) 540 { 541 int i; 542 char pnp[8], rev[9]; 543 544 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 545 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 546 547 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 548 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 549 550 pnp[7] = rev[8] = 0; 551 552 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", 553 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 554 sw_get_bits(buf, 16, 6, 1)) / 100, 555 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 556 sw_get_bits(buf, 16, 6, 1)) % 100, 557 pnp, rev); 558 } 559 560 /* 561 * sw_guess_mode() checks the upper two button bits for toggling - 562 * indication of that the joystick is in 3-bit mode. This is documented 563 * behavior for 3DP ID packet, and for example the FSP does this in 564 * normal packets instead. Fun ... 565 */ 566 567 static int sw_guess_mode(unsigned char *buf, int len) 568 { 569 int i; 570 unsigned char xor = 0; 571 572 for (i = 1; i < len; i++) 573 xor |= (buf[i - 1] ^ buf[i]) & 6; 574 575 return !!xor * 2 + 1; 576 } 577 578 /* 579 * sw_connect() probes for SideWinder type joysticks. 580 */ 581 582 static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 583 { 584 struct sw *sw; 585 struct input_dev *input_dev; 586 int i, j, k, l; 587 int err = 0; 588 unsigned char *buf = NULL; /* [SW_LENGTH] */ 589 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 590 unsigned char m = 1; 591 char comment[40]; 592 593 comment[0] = 0; 594 595 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 596 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 597 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 598 if (!sw || !buf || !idbuf) { 599 err = -ENOMEM; 600 goto fail1; 601 } 602 603 sw->gameport = gameport; 604 605 gameport_set_drvdata(gameport, sw); 606 607 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 608 if (err) 609 goto fail1; 610 611 dbg("Init 0: Opened %s, io %#x, speed %d", 612 gameport->phys, gameport->io, gameport->speed); 613 614 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 615 msleep(SW_TIMEOUT); 616 dbg("Init 1: Mode %d. Length %d.", m , i); 617 618 if (!i) { /* No data. 3d Pro analog mode? */ 619 sw_init_digital(gameport); /* Switch to digital */ 620 msleep(SW_TIMEOUT); 621 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 622 msleep(SW_TIMEOUT); 623 dbg("Init 1b: Length %d.", i); 624 if (!i) { /* No data -> FAIL */ 625 err = -ENODEV; 626 goto fail2; 627 } 628 } 629 630 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 631 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 632 dbg("Init 2: Mode %d. ID Length %d.", m, j); 633 634 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 635 msleep(SW_TIMEOUT); 636 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 637 m |= sw_guess_mode(buf, i); 638 dbg("Init 2b: Mode %d. Length %d.", m, i); 639 if (!i) { 640 err = -ENODEV; 641 goto fail2; 642 } 643 msleep(SW_TIMEOUT); 644 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 645 dbg("Init 2c: ID Length %d.", j); 646 } 647 648 sw->type = -1; 649 k = SW_FAIL; /* Try SW_FAIL times */ 650 l = 0; 651 652 do { 653 k--; 654 msleep(SW_TIMEOUT); 655 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 656 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 657 658 if (i > l) { /* Longer? As we can only lose bits, it makes */ 659 /* no sense to try detection for a packet shorter */ 660 l = i; /* than the previous one */ 661 662 sw->number = 1; 663 sw->gameport = gameport; 664 sw->length = i; 665 sw->bits = m; 666 667 dbg("Init 3a: Case %d.\n", i * m); 668 669 switch (i * m) { 670 case 60: 671 sw->number++; /* fall through */ 672 case 45: /* Ambiguous packet length */ 673 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 674 case 43: 675 sw->type = SW_ID_FSP; 676 break; 677 } 678 sw->number++; /* fall through */ 679 case 30: 680 sw->number++; /* fall through */ 681 case 15: 682 sw->type = SW_ID_GP; 683 break; 684 case 33: 685 case 31: 686 sw->type = SW_ID_FFW; 687 break; 688 case 48: /* Ambiguous */ 689 if (j == 14) { /* ID length 14*3 -> FFP */ 690 sw->type = SW_ID_FFP; 691 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 692 } else 693 sw->type = SW_ID_PP; 694 break; 695 case 66: 696 sw->bits = 3; /* fall through */ 697 case 198: 698 sw->length = 22; /* fall through */ 699 case 64: 700 sw->type = SW_ID_3DP; 701 if (j == 160) 702 sw_3dp_id(idbuf, comment, sizeof(comment)); 703 break; 704 } 705 } 706 707 } while (k && sw->type == -1); 708 709 if (sw->type == -1) { 710 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 711 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 712 sw_print_packet("ID", j * 3, idbuf, 3); 713 sw_print_packet("Data", i * m, buf, m); 714 err = -ENODEV; 715 goto fail2; 716 } 717 718 #ifdef SW_DEBUG 719 sw_print_packet("ID", j * 3, idbuf, 3); 720 sw_print_packet("Data", i * m, buf, m); 721 #endif 722 723 gameport_set_poll_handler(gameport, sw_poll); 724 gameport_set_poll_interval(gameport, 20); 725 726 k = i; 727 l = j; 728 729 for (i = 0; i < sw->number; i++) { 730 int bits, code; 731 732 snprintf(sw->name, sizeof(sw->name), 733 "Microsoft SideWinder %s", sw_name[sw->type]); 734 snprintf(sw->phys[i], sizeof(sw->phys[i]), 735 "%s/input%d", gameport->phys, i); 736 737 sw->dev[i] = input_dev = input_allocate_device(); 738 if (!input_dev) { 739 err = -ENOMEM; 740 goto fail3; 741 } 742 743 input_dev->name = sw->name; 744 input_dev->phys = sw->phys[i]; 745 input_dev->id.bustype = BUS_GAMEPORT; 746 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 747 input_dev->id.product = sw->type; 748 input_dev->id.version = 0x0100; 749 input_dev->dev.parent = &gameport->dev; 750 751 input_set_drvdata(input_dev, sw); 752 753 input_dev->open = sw_open; 754 input_dev->close = sw_close; 755 756 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 757 758 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 759 int min, max, fuzz, flat; 760 761 code = sw_abs[sw->type][j]; 762 min = bits == 1 ? -1 : 0; 763 max = (1 << bits) - 1; 764 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; 765 flat = code == ABS_THROTTLE || bits < 5 ? 766 0 : 1 << (bits - 5); 767 768 input_set_abs_params(input_dev, code, 769 min, max, fuzz, flat); 770 } 771 772 for (j = 0; (code = sw_btn[sw->type][j]); j++) 773 __set_bit(code, input_dev->keybit); 774 775 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); 776 777 err = input_register_device(sw->dev[i]); 778 if (err) 779 goto fail4; 780 } 781 782 out: kfree(buf); 783 kfree(idbuf); 784 785 return err; 786 787 fail4: input_free_device(sw->dev[i]); 788 fail3: while (--i >= 0) 789 input_unregister_device(sw->dev[i]); 790 fail2: gameport_close(gameport); 791 fail1: gameport_set_drvdata(gameport, NULL); 792 kfree(sw); 793 goto out; 794 } 795 796 static void sw_disconnect(struct gameport *gameport) 797 { 798 struct sw *sw = gameport_get_drvdata(gameport); 799 int i; 800 801 for (i = 0; i < sw->number; i++) 802 input_unregister_device(sw->dev[i]); 803 gameport_close(gameport); 804 gameport_set_drvdata(gameport, NULL); 805 kfree(sw); 806 } 807 808 static struct gameport_driver sw_drv = { 809 .driver = { 810 .name = "sidewinder", 811 .owner = THIS_MODULE, 812 }, 813 .description = DRIVER_DESC, 814 .connect = sw_connect, 815 .disconnect = sw_disconnect, 816 }; 817 818 module_gameport_driver(sw_drv); 819