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/input.h> 34 #include <linux/gameport.h> 35 #include <linux/jiffies.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; 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 dev = sw->dev[0]; 314 315 input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7)); 316 input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7)); 317 input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7)); 318 input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7)); 319 320 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 321 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 322 323 for (j = 0; j < 7; j++) 324 input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1)); 325 326 input_report_key(dev, BTN_BASE4, !GB(38,1)); 327 input_report_key(dev, BTN_BASE5, !GB(37,1)); 328 329 input_sync(dev); 330 331 return 0; 332 333 case SW_ID_GP: 334 335 for (i = 0; i < sw->number; i ++) { 336 337 if (sw_parity(GB(i*15,15))) 338 return -1; 339 340 input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); 341 input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1)); 342 343 for (j = 0; j < 10; j++) 344 input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1)); 345 346 input_sync(sw->dev[i]); 347 } 348 349 return 0; 350 351 case SW_ID_PP: 352 case SW_ID_FFP: 353 354 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) 355 return -1; 356 357 dev = sw->dev[0]; 358 input_report_abs(dev, ABS_X, GB( 9,10)); 359 input_report_abs(dev, ABS_Y, GB(19,10)); 360 input_report_abs(dev, ABS_RZ, GB(36, 6)); 361 input_report_abs(dev, ABS_THROTTLE, GB(29, 7)); 362 363 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 364 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 365 366 for (j = 0; j < 9; j++) 367 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1)); 368 369 input_sync(dev); 370 371 return 0; 372 373 case SW_ID_FSP: 374 375 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) 376 return -1; 377 378 dev = sw->dev[0]; 379 input_report_abs(dev, ABS_X, GB( 0,10)); 380 input_report_abs(dev, ABS_Y, GB(16,10)); 381 input_report_abs(dev, ABS_THROTTLE, GB(32, 6)); 382 383 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x); 384 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y); 385 386 for (j = 0; j < 6; j++) 387 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1)); 388 389 input_report_key(dev, BTN_TR, !GB(26,1)); 390 input_report_key(dev, BTN_START, !GB(27,1)); 391 input_report_key(dev, BTN_MODE, !GB(38,1)); 392 input_report_key(dev, BTN_SELECT, !GB(39,1)); 393 394 input_sync(dev); 395 396 return 0; 397 398 case SW_ID_FFW: 399 400 if (!sw_parity(GB(0,33))) 401 return -1; 402 403 dev = sw->dev[0]; 404 input_report_abs(dev, ABS_RX, GB( 0,10)); 405 input_report_abs(dev, ABS_RUDDER, GB(10, 6)); 406 input_report_abs(dev, ABS_THROTTLE, GB(16, 6)); 407 408 for (j = 0; j < 8; j++) 409 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1)); 410 411 input_sync(dev); 412 413 return 0; 414 } 415 416 return -1; 417 } 418 419 /* 420 * sw_read() reads SideWinder joystick data, and reinitializes 421 * the joystick in case of persistent problems. This is the function that is 422 * called from the generic code to poll the joystick. 423 */ 424 425 static int sw_read(struct sw *sw) 426 { 427 unsigned char buf[SW_LENGTH]; 428 int i; 429 430 i = sw_read_packet(sw->gameport, buf, sw->length, 0); 431 432 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */ 433 434 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */ 435 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s" 436 " - going to reinitialize.\n", sw->gameport->phys); 437 sw->fail = SW_FAIL; /* Reinitialize */ 438 i = 128; /* Bogus value */ 439 } 440 441 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */ 442 i = 66; /* Everything is fine */ 443 444 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */ 445 i = 66; /* Everything is fine */ 446 447 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */ 448 memmove(buf, buf + i - 22, 22); /* Move data */ 449 i = 66; /* Carry on */ 450 } 451 } 452 453 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */ 454 455 sw->fail = 0; 456 sw->ok++; 457 458 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */ 459 && sw->ok > SW_OK) { 460 461 printk(KERN_INFO "sidewinder.c: No more trouble on %s" 462 " - enabling optimization again.\n", sw->gameport->phys); 463 sw->length = 22; 464 } 465 466 return 0; 467 } 468 469 sw->ok = 0; 470 sw->fail++; 471 472 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */ 473 474 printk(KERN_INFO "sidewinder.c: Many bit errors on %s" 475 " - disabling optimization.\n", sw->gameport->phys); 476 sw->length = 66; 477 } 478 479 if (sw->fail < SW_FAIL) 480 return -1; /* Not enough, don't reinitialize yet */ 481 482 printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s" 483 " - reinitializing joystick.\n", sw->gameport->phys); 484 485 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */ 486 mdelay(3 * SW_TIMEOUT); 487 sw_init_digital(sw->gameport); 488 } 489 490 mdelay(SW_TIMEOUT); 491 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */ 492 mdelay(SW_TIMEOUT); 493 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */ 494 495 sw->fail = SW_FAIL; 496 497 return -1; 498 } 499 500 static void sw_poll(struct gameport *gameport) 501 { 502 struct sw *sw = gameport_get_drvdata(gameport); 503 504 sw->reads++; 505 if (sw_read(sw)) 506 sw->bads++; 507 } 508 509 static int sw_open(struct input_dev *dev) 510 { 511 struct sw *sw = input_get_drvdata(dev); 512 513 gameport_start_polling(sw->gameport); 514 return 0; 515 } 516 517 static void sw_close(struct input_dev *dev) 518 { 519 struct sw *sw = input_get_drvdata(dev); 520 521 gameport_stop_polling(sw->gameport); 522 } 523 524 /* 525 * sw_print_packet() prints the contents of a SideWinder packet. 526 */ 527 528 static void sw_print_packet(char *name, int length, unsigned char *buf, char bits) 529 { 530 int i; 531 532 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length); 533 for (i = (((length + 3) >> 2) - 1); i >= 0; i--) 534 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits)); 535 printk("]\n"); 536 } 537 538 /* 539 * sw_3dp_id() translates the 3DP id into a human legible string. 540 * Unfortunately I don't know how to do this for the other SW types. 541 */ 542 543 static void sw_3dp_id(unsigned char *buf, char *comment, size_t size) 544 { 545 int i; 546 char pnp[8], rev[9]; 547 548 for (i = 0; i < 7; i++) /* ASCII PnP ID */ 549 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1); 550 551 for (i = 0; i < 8; i++) /* ASCII firmware revision */ 552 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1); 553 554 pnp[7] = rev[8] = 0; 555 556 snprintf(comment, size, " [PnP %d.%02d id %s rev %s]", 557 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */ 558 sw_get_bits(buf, 16, 6, 1)) / 100, 559 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | 560 sw_get_bits(buf, 16, 6, 1)) % 100, 561 pnp, rev); 562 } 563 564 /* 565 * sw_guess_mode() checks the upper two button bits for toggling - 566 * indication of that the joystick is in 3-bit mode. This is documented 567 * behavior for 3DP ID packet, and for example the FSP does this in 568 * normal packets instead. Fun ... 569 */ 570 571 static int sw_guess_mode(unsigned char *buf, int len) 572 { 573 int i; 574 unsigned char xor = 0; 575 576 for (i = 1; i < len; i++) 577 xor |= (buf[i - 1] ^ buf[i]) & 6; 578 579 return !!xor * 2 + 1; 580 } 581 582 /* 583 * sw_connect() probes for SideWinder type joysticks. 584 */ 585 586 static int sw_connect(struct gameport *gameport, struct gameport_driver *drv) 587 { 588 struct sw *sw; 589 struct input_dev *input_dev; 590 int i, j, k, l; 591 int err = 0; 592 unsigned char *buf = NULL; /* [SW_LENGTH] */ 593 unsigned char *idbuf = NULL; /* [SW_LENGTH] */ 594 unsigned char m = 1; 595 char comment[40]; 596 597 comment[0] = 0; 598 599 sw = kzalloc(sizeof(struct sw), GFP_KERNEL); 600 buf = kmalloc(SW_LENGTH, GFP_KERNEL); 601 idbuf = kmalloc(SW_LENGTH, GFP_KERNEL); 602 if (!sw || !buf || !idbuf) { 603 err = -ENOMEM; 604 goto fail1; 605 } 606 607 sw->gameport = gameport; 608 609 gameport_set_drvdata(gameport, sw); 610 611 err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); 612 if (err) 613 goto fail1; 614 615 dbg("Init 0: Opened %s, io %#x, speed %d", 616 gameport->phys, gameport->io, gameport->speed); 617 618 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */ 619 msleep(SW_TIMEOUT); 620 dbg("Init 1: Mode %d. Length %d.", m , i); 621 622 if (!i) { /* No data. 3d Pro analog mode? */ 623 sw_init_digital(gameport); /* Switch to digital */ 624 msleep(SW_TIMEOUT); 625 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 626 msleep(SW_TIMEOUT); 627 dbg("Init 1b: Length %d.", i); 628 if (!i) { /* No data -> FAIL */ 629 err = -ENODEV; 630 goto fail2; 631 } 632 } 633 634 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */ 635 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */ 636 dbg("Init 2: Mode %d. ID Length %d.", m, j); 637 638 if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */ 639 msleep(SW_TIMEOUT); 640 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */ 641 m |= sw_guess_mode(buf, i); 642 dbg("Init 2b: Mode %d. Length %d.", m, i); 643 if (!i) { 644 err = -ENODEV; 645 goto fail2; 646 } 647 msleep(SW_TIMEOUT); 648 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */ 649 dbg("Init 2c: ID Length %d.", j); 650 } 651 652 sw->type = -1; 653 k = SW_FAIL; /* Try SW_FAIL times */ 654 l = 0; 655 656 do { 657 k--; 658 msleep(SW_TIMEOUT); 659 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */ 660 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k); 661 662 if (i > l) { /* Longer? As we can only lose bits, it makes */ 663 /* no sense to try detection for a packet shorter */ 664 l = i; /* than the previous one */ 665 666 sw->number = 1; 667 sw->gameport = gameport; 668 sw->length = i; 669 sw->bits = m; 670 671 dbg("Init 3a: Case %d.\n", i * m); 672 673 switch (i * m) { 674 case 60: 675 sw->number++; 676 case 45: /* Ambiguous packet length */ 677 if (j <= 40) { /* ID length less or eq 40 -> FSP */ 678 case 43: 679 sw->type = SW_ID_FSP; 680 break; 681 } 682 sw->number++; 683 case 30: 684 sw->number++; 685 case 15: 686 sw->type = SW_ID_GP; 687 break; 688 case 33: 689 case 31: 690 sw->type = SW_ID_FFW; 691 break; 692 case 48: /* Ambiguous */ 693 if (j == 14) { /* ID length 14*3 -> FFP */ 694 sw->type = SW_ID_FFP; 695 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on"); 696 } else 697 sw->type = SW_ID_PP; 698 break; 699 case 66: 700 sw->bits = 3; 701 case 198: 702 sw->length = 22; 703 case 64: 704 sw->type = SW_ID_3DP; 705 if (j == 160) 706 sw_3dp_id(idbuf, comment, sizeof(comment)); 707 break; 708 } 709 } 710 711 } while (k && sw->type == -1); 712 713 if (sw->type == -1) { 714 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected " 715 "on %s, contact <vojtech@ucw.cz>\n", gameport->phys); 716 sw_print_packet("ID", j * 3, idbuf, 3); 717 sw_print_packet("Data", i * m, buf, m); 718 err = -ENODEV; 719 goto fail2; 720 } 721 722 #ifdef SW_DEBUG 723 sw_print_packet("ID", j * 3, idbuf, 3); 724 sw_print_packet("Data", i * m, buf, m); 725 #endif 726 727 gameport_set_poll_handler(gameport, sw_poll); 728 gameport_set_poll_interval(gameport, 20); 729 730 k = i; 731 l = j; 732 733 for (i = 0; i < sw->number; i++) { 734 int bits, code; 735 736 snprintf(sw->name, sizeof(sw->name), 737 "Microsoft SideWinder %s", sw_name[sw->type]); 738 snprintf(sw->phys[i], sizeof(sw->phys[i]), 739 "%s/input%d", gameport->phys, i); 740 741 sw->dev[i] = input_dev = input_allocate_device(); 742 if (!input_dev) { 743 err = -ENOMEM; 744 goto fail3; 745 } 746 747 input_dev->name = sw->name; 748 input_dev->phys = sw->phys[i]; 749 input_dev->id.bustype = BUS_GAMEPORT; 750 input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT; 751 input_dev->id.product = sw->type; 752 input_dev->id.version = 0x0100; 753 input_dev->dev.parent = &gameport->dev; 754 755 input_set_drvdata(input_dev, sw); 756 757 input_dev->open = sw_open; 758 input_dev->close = sw_close; 759 760 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 761 762 for (j = 0; (bits = sw_bit[sw->type][j]); j++) { 763 int min, max, fuzz, flat; 764 765 code = sw_abs[sw->type][j]; 766 min = bits == 1 ? -1 : 0; 767 max = (1 << bits) - 1; 768 fuzz = (bits >> 1) >= 2 ? 1 << ((bits >> 1) - 2) : 0; 769 flat = code == ABS_THROTTLE || bits < 5 ? 770 0 : 1 << (bits - 5); 771 772 input_set_abs_params(input_dev, code, 773 min, max, fuzz, flat); 774 } 775 776 for (j = 0; (code = sw_btn[sw->type][j]); j++) 777 __set_bit(code, input_dev->keybit); 778 779 dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k); 780 781 err = input_register_device(sw->dev[i]); 782 if (err) 783 goto fail4; 784 } 785 786 out: kfree(buf); 787 kfree(idbuf); 788 789 return err; 790 791 fail4: input_free_device(sw->dev[i]); 792 fail3: while (--i >= 0) 793 input_unregister_device(sw->dev[i]); 794 fail2: gameport_close(gameport); 795 fail1: gameport_set_drvdata(gameport, NULL); 796 kfree(sw); 797 goto out; 798 } 799 800 static void sw_disconnect(struct gameport *gameport) 801 { 802 struct sw *sw = gameport_get_drvdata(gameport); 803 int i; 804 805 for (i = 0; i < sw->number; i++) 806 input_unregister_device(sw->dev[i]); 807 gameport_close(gameport); 808 gameport_set_drvdata(gameport, NULL); 809 kfree(sw); 810 } 811 812 static struct gameport_driver sw_drv = { 813 .driver = { 814 .name = "sidewinder", 815 .owner = THIS_MODULE, 816 }, 817 .description = DRIVER_DESC, 818 .connect = sw_connect, 819 .disconnect = sw_disconnect, 820 }; 821 822 module_gameport_driver(sw_drv); 823