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#include <linux/jiffies.h> 37 38#define DRIVER_DESC "Microsoft SideWinder joystick family driver" 39 40MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 41MODULE_DESCRIPTION(DRIVER_DESC); 42MODULE_LICENSE("GPL"); 43 44/* 45 * These are really magic values. Changing them can make a problem go away, 46 * as well as break everything. 47 */ 48 49#undef SW_DEBUG 50#undef SW_DEBUG_DATA 51 52#define SW_START 600 /* The time we wait for the first bit [600 us] */ 53#define SW_STROBE 60 /* Max time per bit [60 us] */ 54#define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */ 55#define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */ 56#define SW_END 8 /* Number of bits before end of packet to kick */ 57#define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */ 58#define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */ 59#define SW_OK 64 /* Number of packet read successes to switch optimization back on */ 60#define SW_LENGTH 512 /* Max number of bits in a packet */ 61 62#ifdef SW_DEBUG 63#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg) 64#else 65#define dbg(format, arg...) do {} while (0) 66#endif 67 68/* 69 * SideWinder joystick types ... 70 */ 71 72#define SW_ID_3DP 0 73#define SW_ID_GP 1 74#define SW_ID_PP 2 75#define SW_ID_FFP 3 76#define SW_ID_FSP 4 77#define SW_ID_FFW 5 78 79/* 80 * Names, buttons, axes ... 81 */ 82 83static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro", 84 "Force Feedback Wheel" }; 85 86static char sw_abs[][7] = { 87 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 88 { ABS_X, ABS_Y }, 89 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 90 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 91 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y }, 92 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }}; 93 94static char sw_bit[][7] = { 95 { 10, 10, 9, 10, 1, 1 }, 96 { 1, 1 }, 97 { 10, 10, 6, 7, 1, 1 }, 98 { 10, 10, 6, 7, 1, 1 }, 99 { 10, 10, 6, 1, 1 }, 100 { 10, 7, 7, 1, 1 }}; 101 102static short sw_btn[][12] = { 103 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE }, 104 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE }, 105 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 106 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT }, 107 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT }, 108 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }}; 109 110static struct { 111 int x; 112 int y; 113} sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 114 115struct sw { 116 struct gameport *gameport; 117 struct input_dev *dev[4]; 118 char name[64]; 119 char phys[4][32]; 120 int length; 121 int type; 122 int bits; 123 int number; 124 int fail; 125 int ok; 126 int reads; 127 int bads; 128}; 129 130/* 131 * sw_read_packet() is a function which reads either a data packet, or an 132 * identification packet from a SideWinder joystick. The protocol is very, 133 * very, very braindamaged. Microsoft patented it in US patent #5628686. 134 */ 135 136static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id) 137{ 138 unsigned long flags; 139 int timeout, bitout, sched, i, kick, start, strobe; 140 unsigned char pending, u, v; 141 142 i = -id; /* Don't care about data, only want ID */ 143 timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */ 144 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */ 145 start = gameport_time(gameport, SW_START); 146 strobe = gameport_time(gameport, SW_STROBE); 147 bitout = start; 148 pending = 0; 149 sched = 0; 150 151 local_irq_save(flags); /* Quiet, please */ 152 153 gameport_trigger(gameport); /* Trigger */ 154 v = gameport_read(gameport); 155 156 do { 157 bitout--; 158 u = v; 159 v = gameport_read(gameport); 160 } while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */ 161 162 if (bitout > 0) 163 bitout = strobe; /* Extend time if not timed out */ 164 165 while ((timeout > 0 || bitout > 0) && (i < length)) { 166 167 timeout--; 168 bitout--; /* Decrement timers */ 169 sched--; 170 171 u = v; 172 v = gameport_read(gameport); 173 174 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */ 175 if (i >= 0) /* Want this data */ 176 buf[i] = v >> 5; /* Store it */ 177 i++; /* Advance index */ 178 bitout = strobe; /* Extend timeout for next bit */ 179 } 180 181 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */ 182 sched = kick; /* Schedule second trigger */ 183 kick = 0; /* Don't schedule next time on falling edge */ 184 pending = 1; /* Mark schedule */ 185 } 186 187 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */ 188 gameport_trigger(gameport); /* Trigger */ 189 bitout = start; /* Long bit timeout */ 190 pending = 0; /* Unmark schedule */ 191 timeout = 0; /* Switch from global to bit timeouts */ 192 } 193 } 194 195 local_irq_restore(flags); /* Done - relax */ 196 197#ifdef SW_DEBUG_DATA 198 { 199 int j; 200 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i); 201 for (j = 0; j < i; j++) printk("%d", buf[j]); 202 printk("]\n"); 203 } 204#endif 205 206 return i; 207} 208 209/* 210 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64. 211 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number 212 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits 213 * is number of bits per triplet. 214 */ 215 216#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits) 217 218static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits) 219{ 220 __u64 data = 0; 221 int tri = pos % bits; /* Start position */ 222 int i = pos / bits; 223 int bit = 0; 224 225 while (num--) { 226 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */ 227 if (tri == bits) { 228 i++; /* Next triplet */ 229 tri = 0; 230 } 231 } 232 233 return data; 234} 235 236/* 237 * sw_init_digital() initializes a SideWinder 3D Pro joystick 238 * into digital mode. 239 */ 240 241static void sw_init_digital(struct gameport *gameport) 242{ 243 int seq[] = { 140, 140+725, 140+300, 0 }; 244 unsigned long flags; 245 int i, t; 246 247 local_irq_save(flags); 248 249 i = 0; 250 do { 251 gameport_trigger(gameport); /* Trigger */ 252 t = gameport_time(gameport, SW_TIMEOUT * 1000); 253 while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */ 254 udelay(seq[i]); /* Delay magic time */ 255 } while (seq[++i]); 256 257 gameport_trigger(gameport); /* Last trigger */ 258 259 local_irq_restore(flags); 260} 261 262/* 263 * sw_parity() computes parity of __u64 264 */ 265 266static int sw_parity(__u64 t) 267{ 268 int x = t ^ (t >> 32); 269 270 x ^= x >> 16; 271 x ^= x >> 8; 272 x ^= x >> 4; 273 x ^= x >> 2; 274 x ^= x >> 1; 275 return x & 1; 276} 277 278/* 279 * sw_ccheck() checks synchronization bits and computes checksum of nibbles. 280 */ 281 282static int sw_check(__u64 t) 283{ 284 unsigned char sum = 0; 285 286 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */ 287 return -1; 288 289 while (t) { /* Sum */ 290 sum += t & 0xf; 291 t >>= 4; 292 } 293 294 return sum & 0xf; 295} 296 297/* 298 * sw_parse() analyzes SideWinder joystick data, and writes the results into 299 * the axes and buttons arrays. 300 */ 301 302static int sw_parse(unsigned char *buf, struct sw *sw) 303{ 304 int hat, i, j; 305 struct input_dev *dev; 306 307 switch (sw->type) { 308 309 case SW_ID_3DP: 310 311 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) 312 return -1; 313 314 dev = sw->dev[0]; 315 316 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 317 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 318 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 319 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 320 321 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 322 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 323 324 for (j = 0; j < 7; j++) 325 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 326 327 input_report_key(dev, BTN_BASE4, !GB(38,1)); 328 input_report_key(dev, BTN_BASE5, !GB(37,1)); 329 330 input_sync(dev); 331 332 return 0; 333 334 case SW_ID_GP: 335 336 for (i = 0; i < sw->number; i ++) { 337 338 if (sw_parity(GB(i*15,15))) 339 return -1; 340 341 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 342 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 343 344 for (j = 0; j < 10; j++) 345 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 346 347 input_sync(sw->dev[i]); 348 } 349 350 return 0; 351 352 case SW_ID_PP: 353 case SW_ID_FFP: 354 355 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 356 return -1; 357 358 dev = sw->dev[0]; 359 input_report_abs(dev, ABS_X, GB( 9,10)); 360 input_report_abs(dev, ABS_Y, GB(19,10)); 361 input_report_abs(dev, ABS_RZ, GB(36, 6)); 362 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 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 < 9; j++) 368 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 369 370 input_sync(dev); 371 372 return 0; 373 374 case SW_ID_FSP: 375 376 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 377 return -1; 378 379 dev = sw->dev[0]; 380 input_report_abs(dev, ABS_X, GB( 0,10)); 381 input_report_abs(dev, ABS_Y, GB(16,10)); 382 input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); 383 384 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 385 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 386 387 for (j = 0; j < 6; j++) 388 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); 389 390 input_report_key(dev, BTN_TR, !GB(26,1)); 391 input_report_key(dev, BTN_START, !GB(27,1)); 392 input_report_key(dev, BTN_MODE, !GB(38,1)); 393 input_report_key(dev, BTN_SELECT, !GB(39,1)); 394 395 input_sync(dev); 396 397 return 0; 398 399 case SW_ID_FFW: 400 401 if (!sw_parity(GB(0,33))) 402 return -1; 403 404 dev = sw->dev[0]; 405 input_report_abs(dev, ABS_RX, GB( 0,10)); 406 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 407 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 408 409 for (j = 0; j < 8; j++) 410 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 411 412 input_sync(dev); 413 414 return 0; 415 } 416 417 return -1; 418} 419 420/* 421 * sw_read() reads SideWinder joystick data, and reinitializes 422 * the joystick in case of persistent problems. This is the function that is 423 * called from the generic code to poll the joystick. 424 */ 425 426static int sw_read(struct sw *sw) 427{ 428 unsigned char buf[SW_LENGTH]; 429 int i; 430 431 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 432 433 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 434 435 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 436 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 437 " - going to reinitialize.\n", sw->gameport->phys); 438 sw->fail = SW_FAIL; /* Reinitialize */ 439 i = 128; /* Bogus value */ 440 } 441 442 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 443 i = 66; /* Everything is fine */ 444 445 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 446 i = 66; /* Everything is fine */ 447 448 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 449 memmove(buf, buf + i - 22, 22); /* Move data */ 450 i = 66; /* Carry on */ 451 } 452 } 453 454 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 455 456 sw->fail = 0; 457 sw->ok++; 458 459 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 460 && sw->ok > SW_OK) { 461 462 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 463 " - enabling optimization again.\n", sw->gameport->phys); 464 sw->length = 22; 465 } 466 467 return 0; 468 } 469 470 sw->ok = 0; 471 sw->fail++; 472 473 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 474 475 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 476 " - disabling optimization.\n", sw->gameport->phys); 477 sw->length = 66; 478 } 479 480 if (sw->fail < SW_FAIL) 481 return -1; /* Not enough, don't reinitialize yet */ 482 483 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 484 " - reinitializing joystick.\n", sw->gameport->phys); 485 486 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 487 mdelay(3 * SW_TIMEOUT); 488 sw_init_digital(sw->gameport); 489 } 490 491 mdelay(SW_TIMEOUT); 492 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 493 mdelay(SW_TIMEOUT); 494 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 495 496 sw->fail = SW_FAIL; 497 498 return -1; 499} 500 501static void sw_poll(struct gameport *gameport) 502{ 503 struct sw *sw = gameport_get_drvdata(gameport); 504 505 sw->reads++; 506 if (sw_read(sw)) 507 sw->bads++; 508} 509 510static int sw_open(struct input_dev *dev) 511{ 512 struct sw *sw = input_get_drvdata(dev); 513 514 gameport_start_polling(sw->gameport); 515 return 0; 516} 517 518static void sw_close(struct input_dev *dev) 519{ 520 struct sw *sw = input_get_drvdata(dev); 521 522 gameport_stop_polling(sw->gameport); 523} 524 525/* 526 * sw_print_packet() prints the contents of a SideWinder packet. 527 */ 528 529static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 530{ 531 int i; 532 533 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 534 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 535 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 536 printk("]\n"); 537} 538 539/* 540 * sw_3dp_id() translates the 3DP id into a human legible string. 541 * Unfortunately I don't know how to do this for the other SW types. 542 */ 543 544static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) 545{ 546 int i; 547 char pnp[8], rev[9]; 548 549 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 550 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 551 552 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 553 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 554 555 pnp[7] = rev[8] = 0; 556 557 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", 558 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 559 sw_get_bits(buf, 16, 6, 1)) / 100, 560 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 561 sw_get_bits(buf, 16, 6, 1)) % 100, 562 pnp, rev); 563} 564 565/* 566 * sw_guess_mode() checks the upper two button bits for toggling - 567 * indication of that the joystick is in 3-bit mode. This is documented 568 * behavior for 3DP ID packet, and for example the FSP does this in 569 * normal packets instead. Fun ... 570 */ 571 572static int sw_guess_mode(unsigned char *buf, int len) 573{ 574 int i; 575 unsigned char xor = 0; 576 577 for (i = 1; i < len; i++) 578 xor |= (buf[i - 1] ^ buf[i]) & 6; 579 580 return !!xor * 2 + 1; 581} 582 583/* 584 * sw_connect() probes for SideWinder type joysticks. 585 */ 586 587static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 588{ 589 struct sw *sw; 590 struct input_dev *input_dev; 591 int i, j, k, l; 592 int err = 0; 593 unsigned char *buf = NULL; /* [SW_LENGTH] */ 594 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 595 unsigned char m = 1; 596 char comment[40]; 597 598 comment[0] = 0; 599 600 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 601 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 602 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 603 if (!sw || !buf || !idbuf) { 604 err = -ENOMEM; 605 goto fail1; 606 } 607 608 sw->gameport = gameport; 609 610 gameport_set_drvdata(gameport, sw); 611 612 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 613 if (err) 614 goto fail1; 615 616 dbg("Init 0: Opened %s, io %#x, speed %d", 617 gameport->phys, gameport->io, gameport->speed); 618 619 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 620 msleep(SW_TIMEOUT); 621 dbg("Init 1: Mode %d. Length %d.", m , i); 622 623 if (!i) { /* No data. 3d Pro analog mode? */ 624 sw_init_digital(gameport); /* Switch to digital */ 625 msleep(SW_TIMEOUT); 626 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 627 msleep(SW_TIMEOUT); 628 dbg("Init 1b: Length %d.", i); 629 if (!i) { /* No data -> FAIL */ 630 err = -ENODEV; 631 goto fail2; 632 } 633 } 634 635 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 636 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 637 dbg("Init 2: Mode %d. ID Length %d.", m, j); 638 639 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 640 msleep(SW_TIMEOUT); 641 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 642 m |= sw_guess_mode(buf, i); 643 dbg("Init 2b: Mode %d. Length %d.", m, i); 644 if (!i) { 645 err = -ENODEV; 646 goto fail2; 647 } 648 msleep(SW_TIMEOUT); 649 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 650 dbg("Init 2c: ID Length %d.", j); 651 } 652 653 sw->type = -1; 654 k = SW_FAIL; /* Try SW_FAIL times */ 655 l = 0; 656 657 do { 658 k--; 659 msleep(SW_TIMEOUT); 660 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 661 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 662 663 if (i > l) { /* Longer? As we can only lose bits, it makes */ 664 /* no sense to try detection for a packet shorter */ 665 l = i; /* than the previous one */ 666 667 sw->number = 1; 668 sw->gameport = gameport; 669 sw->length = i; 670 sw->bits = m; 671 672 dbg("Init 3a: Case %d.\n", i * m); 673 674 switch (i * m) { 675 case 60: 676 sw->number++; 677 case 45: /* Ambiguous packet length */ 678 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 679 case 43: 680 sw->type = SW_ID_FSP; 681 break; 682 } 683 sw->number++; 684 case 30: 685 sw->number++; 686 case 15: 687 sw->type = SW_ID_GP; 688 break; 689 case 33: 690 case 31: 691 sw->type = SW_ID_FFW; 692 break; 693 case 48: /* Ambiguous */ 694 if (j == 14) { /* ID length 14*3 -> FFP */ 695 sw->type = SW_ID_FFP; 696 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 697 } else 698 sw->type = SW_ID_PP; 699 break; 700 case 66: 701 sw->bits = 3; 702 case 198: 703 sw->length = 22; 704 case 64: 705 sw->type = SW_ID_3DP; 706 if (j == 160) 707 sw_3dp_id(idbuf, comment, sizeof(comment)); 708 break; 709 } 710 } 711 712 } while (k && sw->type == -1); 713 714 if (sw->type == -1) { 715 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 716 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 717 sw_print_packet("ID", j * 3, idbuf, 3); 718 sw_print_packet("Data", i * m, buf, m); 719 err = -ENODEV; 720 goto fail2; 721 } 722 723#ifdef SW_DEBUG 724 sw_print_packet("ID", j * 3, idbuf, 3); 725 sw_print_packet("Data", i * m, buf, m); 726#endif 727 728 gameport_set_poll_handler(gameport, sw_poll); 729 gameport_set_poll_interval(gameport, 20); 730 731 k = i; 732 l = j; 733 734 for (i = 0; i < sw->number; i++) { 735 int bits, code; 736 737 snprintf(sw->name, sizeof(sw->name), 738 "Microsoft SideWinder %s", sw_name[sw->type]); 739 snprintf(sw->phys[i], sizeof(sw->phys[i]), 740 "%s/input%d", gameport->phys, i); 741 742 sw->dev[i] = input_dev = input_allocate_device(); 743 if (!input_dev) { 744 err = -ENOMEM; 745 goto fail3; 746 } 747 748 input_dev->name = sw->name; 749 input_dev->phys = sw->phys[i]; 750 input_dev->id.bustype = BUS_GAMEPORT; 751 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 752 input_dev->id.product = sw->type; 753 input_dev->id.version = 0x0100; 754 input_dev->dev.parent = &gameport->dev; 755 756 input_set_drvdata(input_dev, sw); 757 758 input_dev->open = sw_open; 759 input_dev->close = sw_close; 760 761 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 762 763 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 764 int min, max, fuzz, flat; 765 766 code = sw_abs[sw->type][j]; 767 min = bits == 1 ? -1 : 0; 768 max = (1 << bits) - 1; 769 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; 770 flat = code == ABS_THROTTLE || bits < 5 ? 771 0 : 1 << (bits - 5); 772 773 input_set_abs_params(input_dev, code, 774 min, max, fuzz, flat); 775 } 776 777 for (j = 0; (code = sw_btn[sw->type][j]); j++) 778 __set_bit(code, input_dev->keybit); 779 780 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); 781 782 err = input_register_device(sw->dev[i]); 783 if (err) 784 goto fail4; 785 } 786 787 out: kfree(buf); 788 kfree(idbuf); 789 790 return err; 791 792 fail4: input_free_device(sw->dev[i]); 793 fail3: while (--i >= 0) 794 input_unregister_device(sw->dev[i]); 795 fail2: gameport_close(gameport); 796 fail1: gameport_set_drvdata(gameport, NULL); 797 kfree(sw); 798 goto out; 799} 800 801static void sw_disconnect(struct gameport *gameport) 802{ 803 struct sw *sw = gameport_get_drvdata(gameport); 804 int i; 805 806 for (i = 0; i < sw->number; i++) 807 input_unregister_device(sw->dev[i]); 808 gameport_close(gameport); 809 gameport_set_drvdata(gameport, NULL); 810 kfree(sw); 811} 812 813static struct gameport_driver sw_drv = { 814 .driver = { 815 .name = "sidewinder", 816 .owner = THIS_MODULE, 817 }, 818 .description = DRIVER_DESC, 819 .connect = sw_connect, 820 .disconnect = sw_disconnect, 821}; 822 823static int __init sw_init(void) 824{ 825 return gameport_register_driver(&sw_drv); 826} 827 828static void __exit sw_exit(void) 829{ 830 gameport_unregister_driver(&sw_drv); 831} 832 833module_init(sw_init); 834module_exit(sw_exit); 835