File: /usr/src/linux/drivers/char/joystick/sidewinder.c
1 /*
2 * $Id: sidewinder.c,v 1.20 2001/05/19 08:14:54 vojtech Exp $
3 *
4 * Copyright (c) 1998-2001 Vojtech Pavlik
5 *
6 * Sponsored by SuSE
7 */
8
9 /*
10 * Microsoft SideWinder joystick family driver for Linux
11 */
12
13 /*
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 * Should you need to contact me, the author, you can do so either by
29 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
30 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
31 */
32
33 #include <linux/delay.h>
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/slab.h>
37 #include <linux/init.h>
38 #include <linux/input.h>
39 #include <linux/gameport.h>
40
41 /*
42 * These are really magic values. Changing them can make a problem go away,
43 * as well as break everything.
44 */
45
46 #undef SW_DEBUG
47
48 #define SW_START 400 /* The time we wait for the first bit [400 us] */
49 #define SW_STROBE 45 /* Max time per bit [45 us] */
50 #define SW_TIMEOUT 4000 /* Wait for everything to settle [4 ms] */
51 #define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
52 #define SW_END 8 /* Number of bits before end of packet to kick */
53 #define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
54 #define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
55 #define SW_OK 64 /* Number of packet read successes to switch optimization back on */
56 #define SW_LENGTH 512 /* Max number of bits in a packet */
57 #define SW_REFRESH HZ/50 /* Time to wait between updates of joystick data [20 ms] */
58
59 #ifdef SW_DEBUG
60 #define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg)
61 #else
62 #define dbg(format, arg...) do {} while (0)
63 #endif
64
65 /*
66 * SideWinder joystick types ...
67 */
68
69 #define SW_ID_3DP 0
70 #define SW_ID_GP 1
71 #define SW_ID_PP 2
72 #define SW_ID_FFP 3
73 #define SW_ID_FSP 4
74 #define SW_ID_FFW 5
75
76 /*
77 * Names, buttons, axes ...
78 */
79
80 static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
81 "Force Feedback Wheel" };
82
83 static char sw_abs[][7] = {
84 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
85 { ABS_X, ABS_Y },
86 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
87 { ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
88 { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
89 { ABS_RX, ABS_RUDDER, ABS_THROTTLE }};
90
91 static char sw_bit[][7] = {
92 { 10, 10, 9, 10, 1, 1 },
93 { 1, 1 },
94 { 10, 10, 6, 7, 1, 1 },
95 { 10, 10, 6, 7, 1, 1 },
96 { 10, 10, 6, 1, 1 },
97 { 10, 7, 7, 1, 1 }};
98
99 static short sw_btn[][12] = {
100 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE },
101 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE },
102 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
103 { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
104 { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT },
105 { BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }};
106
107 static struct {
108 int x;
109 int y;
110 } sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
111
112 struct sw {
113 struct gameport *gameport;
114 struct timer_list timer;
115 struct input_dev dev[4];
116 char name[64];
117 int length;
118 int type;
119 int bits;
120 int number;
121 int fail;
122 int ok;
123 int reads;
124 int bads;
125 int used;
126 };
127
128 /*
129 * sw_read_packet() is a function which reads either a data packet, or an
130 * identification packet from a SideWinder joystick. The protocol is very,
131 * very, very braindamaged. Microsoft patented it in US patent #5628686.
132 */
133
134 static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id)
135 {
136 unsigned long flags;
137 int timeout, bitout, sched, i, kick, start, strobe;
138 unsigned char pending, u, v;
139
140 i = -id; /* Don't care about data, only want ID */
141 timeout = id ? gameport_time(gameport, SW_TIMEOUT) : 0; /* Set up global timeout for ID packet */
142 kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */
143 start = gameport_time(gameport, SW_START);
144 strobe = gameport_time(gameport, SW_STROBE);
145 bitout = start;
146 pending = 0;
147 sched = 0;
148
149 __save_flags(flags); /* Quiet, please */
150 __cli();
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) bitout = strobe; /* Extend time if not timed out */
162
163 while ((timeout > 0 || bitout > 0) && (i < length)) {
164
165 timeout--;
166 bitout--; /* Decrement timers */
167 sched--;
168
169 u = v;
170 v = gameport_read(gameport);
171
172 if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */
173 if (i >= 0) /* Want this data */
174 buf[i] = v >> 5; /* Store it */
175 i++; /* Advance index */
176 bitout = strobe; /* Extend timeout for next bit */
177 }
178
179 if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */
180 sched = kick; /* Schedule second trigger */
181 kick = 0; /* Don't schedule next time on falling edge */
182 pending = 1; /* Mark schedule */
183 }
184
185 if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */
186 gameport_trigger(gameport); /* Trigger */
187 bitout = start; /* Long bit timeout */
188 pending = 0; /* Unmark schedule */
189 timeout = 0; /* Switch from global to bit timeouts */
190 }
191 }
192
193 __restore_flags(flags); /* Done - relax */
194
195 #ifdef SW_DEBUG
196 {
197 int j;
198 printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i);
199 for (j = 0; j < i; j++) printk("%d", buf[j]);
200 printk("]\n");
201 }
202 #endif
203
204 return i;
205 }
206
207 /*
208 * sw_get_bits() and GB() compose bits from the triplet buffer into a __u64.
209 * Parameter 'pos' is bit number inside packet where to start at, 'num' is number
210 * of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
211 * is number of bits per triplet.
212 */
213
214 #define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits)
215
216 static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits)
217 {
218 __u64 data = 0;
219 int tri = pos % bits; /* Start position */
220 int i = pos / bits;
221 int bit = 0;
222
223 while (num--) {
224 data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
225 if (tri == bits) {
226 i++; /* Next triplet */
227 tri = 0;
228 }
229 }
230
231 return data;
232 }
233
234 /*
235 * sw_init_digital() initializes a SideWinder 3D Pro joystick
236 * into digital mode.
237 */
238
239 static void sw_init_digital(struct gameport *gameport)
240 {
241 int seq[] = { 140, 140+725, 140+300, 0 };
242 unsigned long flags;
243 int i, t;
244
245 __save_flags(flags);
246 __cli();
247
248 i = 0;
249 do {
250 gameport_trigger(gameport); /* Trigger */
251 t = gameport_time(gameport, SW_TIMEOUT);
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 __restore_flags(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 x ^= x >> 16;
269 x ^= x >> 8;
270 x ^= x >> 4;
271 x ^= x >> 2;
272 x ^= x >> 1;
273 return x & 1;
274 }
275
276 /*
277 * sw_ccheck() checks synchronization bits and computes checksum of nibbles.
278 */
279
280 static int sw_check(__u64 t)
281 {
282 unsigned char sum = 0;
283
284 if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
285 return -1;
286
287 while (t) { /* Sum */
288 sum += t & 0xf;
289 t >>= 4;
290 }
291
292 return sum & 0xf;
293 }
294
295 /*
296 * sw_parse() analyzes SideWinder joystick data, and writes the results into
297 * the axes and buttons arrays.
298 */
299
300 static int sw_parse(unsigned char *buf, struct sw *sw)
301 {
302 int hat, i, j;
303 struct input_dev *dev = sw->dev;
304
305 switch (sw->type) {
306
307 case SW_ID_3DP:
308
309 if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8) return -1;
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 return 0;
326
327 case SW_ID_GP:
328
329 for (i = 0; i < sw->number; i ++) {
330
331 if (sw_parity(GB(i*15,15))) return -1;
332
333 input_report_abs(dev + i, ABS_X, GB(i*15+3,1) - GB(i*15+2,1));
334 input_report_abs(dev + i, ABS_Y, GB(i*15+0,1) - GB(i*15+1,1));
335
336 for (j = 0; j < 10; j++)
337 input_report_key(dev + i, sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1));
338 }
339
340 return 0;
341
342 case SW_ID_PP:
343 case SW_ID_FFP:
344
345 if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) return -1;
346
347 input_report_abs(dev, ABS_X, GB( 9,10));
348 input_report_abs(dev, ABS_Y, GB(19,10));
349 input_report_abs(dev, ABS_RZ, GB(36, 6));
350 input_report_abs(dev, ABS_THROTTLE, GB(29, 7));
351
352 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
353 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
354
355 for (j = 0; j < 9; j++)
356 input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1));
357
358 return 0;
359
360 case SW_ID_FSP:
361
362 if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) return -1;
363
364 input_report_abs(dev, ABS_X, GB( 0,10));
365 input_report_abs(dev, ABS_Y, GB(16,10));
366 input_report_abs(dev, ABS_THROTTLE, GB(32, 6));
367
368 input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
369 input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
370
371 for (j = 0; j < 6; j++)
372 input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1));
373
374 input_report_key(dev, BTN_TR, GB(26,1));
375 input_report_key(dev, BTN_START, GB(27,1));
376 input_report_key(dev, BTN_MODE, GB(38,1));
377 input_report_key(dev, BTN_SELECT, GB(39,1));
378
379 return 0;
380
381 case SW_ID_FFW:
382
383 if (!sw_parity(GB(0,33))) return -1;
384
385 input_report_abs(dev, ABS_RX, GB( 0,10));
386 input_report_abs(dev, ABS_RUDDER, GB(10, 6));
387 input_report_abs(dev, ABS_THROTTLE, GB(16, 6));
388
389 for (j = 0; j < 8; j++)
390 input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1));
391
392 return 0;
393 }
394
395 return -1;
396 }
397
398 /*
399 * sw_read() reads SideWinder joystick data, and reinitializes
400 * the joystick in case of persistent problems. This is the function that is
401 * called from the generic code to poll the joystick.
402 */
403
404 static int sw_read(struct sw *sw)
405 {
406 unsigned char buf[SW_LENGTH];
407 int i;
408
409 i = sw_read_packet(sw->gameport, buf, sw->length, 0);
410
411 if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */
412
413 if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */
414 printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on gameport%d"
415 " - going to reinitialize.\n", sw->gameport->number);
416 sw->fail = SW_FAIL; /* Reinitialize */
417 i = 128; /* Bogus value */
418 }
419
420 if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */
421 i = 66; /* Everything is fine */
422
423 if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */
424 i = 66; /* Everything is fine */
425
426 if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */
427 memmove(buf, buf + i - 22, 22); /* Move data */
428 i = 66; /* Carry on */
429 }
430 }
431
432 if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */
433
434 sw->fail = 0;
435 sw->ok++;
436
437 if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */
438 && sw->ok > SW_OK) {
439
440 printk(KERN_INFO "sidewinder.c: No more trouble on gameport%d"
441 " - enabling optimization again.\n", sw->gameport->number);
442 sw->length = 22;
443 }
444
445 return 0;
446 }
447
448 sw->ok = 0;
449 sw->fail++;
450
451 if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */
452
453 printk(KERN_INFO "sidewinder.c: Many bit errors on gameport%d"
454 " - disabling optimization.\n", sw->gameport->number);
455 sw->length = 66;
456 }
457
458 if (sw->fail < SW_FAIL) return -1; /* Not enough, don't reinitialize yet */
459
460 printk(KERN_WARNING "sidewinder.c: Too many bit errors on gameport%d"
461 " - reinitializing joystick.\n", sw->gameport->number);
462
463 if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */
464 udelay(3 * SW_TIMEOUT);
465 sw_init_digital(sw->gameport);
466 }
467
468 udelay(SW_TIMEOUT);
469 i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */
470 udelay(SW_TIMEOUT);
471 sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */
472
473 sw->fail = SW_FAIL;
474
475 return -1;
476 }
477
478 static void sw_timer(unsigned long private)
479 {
480 struct sw *sw = (void *) private;
481
482 sw->reads++;
483 if (sw_read(sw)) sw->bads++;
484 mod_timer(&sw->timer, jiffies + SW_REFRESH);
485 }
486
487 static int sw_open(struct input_dev *dev)
488 {
489 struct sw *sw = dev->private;
490 if (!sw->used++)
491 mod_timer(&sw->timer, jiffies + SW_REFRESH);
492 return 0;
493 }
494
495 static void sw_close(struct input_dev *dev)
496 {
497 struct sw *sw = dev->private;
498 if (!--sw->used)
499 del_timer(&sw->timer);
500 }
501
502 /*
503 * sw_print_packet() prints the contents of a SideWinder packet.
504 */
505
506 static void sw_print_packet(char *name, int length, unsigned char *buf, char bits)
507 {
508 int i;
509
510 printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length);
511 for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
512 printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits));
513 printk("]\n");
514 }
515
516 /*
517 * sw_3dp_id() translates the 3DP id into a human legible string.
518 * Unfortunately I don't know how to do this for the other SW types.
519 */
520
521 static void sw_3dp_id(unsigned char *buf, char *comment)
522 {
523 int i;
524 char pnp[8], rev[9];
525
526 for (i = 0; i < 7; i++) /* ASCII PnP ID */
527 pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1);
528
529 for (i = 0; i < 8; i++) /* ASCII firmware revision */
530 rev[i] = sw_get_bits(buf, 88+8*i, 8, 1);
531
532 pnp[7] = rev[8] = 0;
533
534 sprintf(comment, " [PnP %d.%02d id %s rev %s]",
535 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */
536 sw_get_bits(buf, 16, 6, 1)) / 100,
537 (int) ((sw_get_bits(buf, 8, 6, 1) << 6) |
538 sw_get_bits(buf, 16, 6, 1)) % 100,
539 pnp, rev);
540 }
541
542 /*
543 * sw_guess_mode() checks the upper two button bits for toggling -
544 * indication of that the joystick is in 3-bit mode. This is documented
545 * behavior for 3DP ID packet, and for example the FSP does this in
546 * normal packets instead. Fun ...
547 */
548
549 static int sw_guess_mode(unsigned char *buf, int len)
550 {
551 int i;
552 unsigned char xor = 0;
553 for (i = 1; i < len; i++) xor |= (buf[i - 1] ^ buf[i]) & 6;
554 return !!xor * 2 + 1;
555 }
556
557 /*
558 * sw_connect() probes for SideWinder type joysticks.
559 */
560
561 static void sw_connect(struct gameport *gameport, struct gameport_dev *dev)
562 {
563 struct sw *sw;
564 int i, j, k, l;
565 unsigned char buf[SW_LENGTH];
566 unsigned char idbuf[SW_LENGTH];
567 unsigned char m = 1;
568 char comment[40];
569
570 comment[0] = 0;
571
572 if (!(sw = kmalloc(sizeof(struct sw), GFP_KERNEL))) return;
573 memset(sw, 0, sizeof(struct sw));
574
575 gameport->private = sw;
576
577 sw->gameport = gameport;
578 init_timer(&sw->timer);
579 sw->timer.data = (long) sw;
580 sw->timer.function = sw_timer;
581
582 if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
583 goto fail1;
584
585 dbg("Init 0: Opened gameport %d, io %#x, speed %d",
586 gameport->number, gameport->io, gameport->speed);
587
588 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */
589 m |= sw_guess_mode(buf, i); /* Data packet (1-bit) can carry mode info [FSP] */
590 udelay(SW_TIMEOUT);
591 dbg("Init 1: Mode %d. Length %d.", m , i);
592
593 if (!i) { /* No data. 3d Pro analog mode? */
594 sw_init_digital(gameport); /* Switch to digital */
595 udelay(SW_TIMEOUT);
596 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
597 udelay(SW_TIMEOUT);
598 dbg("Init 1b: Length %d.", i);
599 if (!i) goto fail2; /* No data -> FAIL */
600 }
601
602 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */
603 m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
604 dbg("Init 2: Mode %d. ID Length %d.", m , j);
605
606 if (!j) { /* Read ID failed. Happens in 1-bit mode on PP */
607 udelay(SW_TIMEOUT);
608 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
609 dbg("Init 2b: Mode %d. Length %d.", m, i);
610 if (!i) goto fail2;
611 udelay(SW_TIMEOUT);
612 j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */
613 dbg("Init 2c: ID Length %d.", j);
614 }
615
616 sw->type = -1;
617 k = SW_FAIL; /* Try SW_FAIL times */
618 l = 0;
619
620 do {
621 k--;
622 udelay(SW_TIMEOUT);
623 i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */
624 dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k);
625
626 if (i > l) { /* Longer? As we can only lose bits, it makes */
627 /* no sense to try detection for a packet shorter */
628 l = i; /* than the previous one */
629
630 sw->number = 1;
631 sw->gameport = gameport;
632 sw->length = i;
633 sw->bits = m;
634
635 dbg("Init 3a: Case %d.\n", i * m);
636
637 switch (i * m) {
638 case 60:
639 sw->number++;
640 case 45: /* Ambiguous packet length */
641 if (j <= 40) { /* ID length less or eq 40 -> FSP */
642 case 43:
643 sw->type = SW_ID_FSP;
644 break;
645 }
646 sw->number++;
647 case 30:
648 sw->number++;
649 case 15:
650 sw->type = SW_ID_GP;
651 break;
652 case 33:
653 case 31:
654 sw->type = SW_ID_FFW;
655 break;
656 case 48: /* Ambiguous */
657 if (j == 14) { /* ID length 14*3 -> FFP */
658 sw->type = SW_ID_FFP;
659 sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on");
660 } else
661 sw->type = SW_ID_PP;
662 break;
663 case 198:
664 sw->length = 22;
665 case 64:
666 sw->type = SW_ID_3DP;
667 if (j == 160) sw_3dp_id(idbuf, comment);
668 break;
669 }
670 }
671
672 } while (k && (sw->type == -1));
673
674 if (sw->type == -1) {
675 printk(KERN_WARNING "sidewinder.c: unknown joystick device detected "
676 "on gameport%d, contact <vojtech@suse.cz>\n", gameport->number);
677 sw_print_packet("ID", j * 3, idbuf, 3);
678 sw_print_packet("Data", i * m, buf, m);
679 goto fail2;
680 }
681
682 #ifdef SW_DEBUG
683 sw_print_packet("ID", j * 3, idbuf, 3);
684 sw_print_packet("Data", i * m, buf, m);
685 #endif
686
687 k = i;
688 l = j;
689
690 for (i = 0; i < sw->number; i++) {
691 int bits, code;
692
693 sprintf(sw->name, "Microsoft SideWinder %s", sw_name[sw->type]);
694
695 sw->dev[i].private = sw;
696
697 sw->dev[i].open = sw_open;
698 sw->dev[i].close = sw_close;
699
700 sw->dev[i].name = sw->name;
701 sw->dev[i].idbus = BUS_GAMEPORT;
702 sw->dev[i].idvendor = GAMEPORT_ID_VENDOR_MICROSOFT;
703 sw->dev[i].idproduct = sw->type;
704 sw->dev[i].idversion = 0x0100;
705
706 sw->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
707
708 for (j = 0; (bits = sw_bit[sw->type][j]); j++) {
709 code = sw_abs[sw->type][j];
710 set_bit(code, sw->dev[i].absbit);
711 sw->dev[i].absmax[code] = (1 << bits) - 1;
712 sw->dev[i].absmin[code] = (bits == 1) ? -1 : 0;
713 sw->dev[i].absfuzz[code] = ((bits >> 1) >= 2) ? (1 << ((bits >> 1) - 2)) : 0;
714 if (code != ABS_THROTTLE)
715 sw->dev[i].absflat[code] = (bits >= 5) ? (1 << (bits - 5)) : 0;
716 }
717
718 for (j = 0; (code = sw_btn[sw->type][j]); j++)
719 set_bit(code, sw->dev[i].keybit);
720
721 input_register_device(sw->dev + i);
722 printk(KERN_INFO "input%d: %s%s on gameport%d.%d [%d-bit id %d data %d]\n",
723 sw->dev[i].number, sw->name, comment, gameport->number, i, m, l, k);
724 }
725
726 return;
727 fail2: gameport_close(gameport);
728 fail1: kfree(sw);
729 }
730
731 static void sw_disconnect(struct gameport *gameport)
732 {
733 int i;
734
735 struct sw *sw = gameport->private;
736 for (i = 0; i < sw->number; i++)
737 input_unregister_device(sw->dev + i);
738 gameport_close(gameport);
739 kfree(sw);
740 }
741
742 static struct gameport_dev sw_dev = {
743 connect: sw_connect,
744 disconnect: sw_disconnect,
745 };
746
747 int __init sw_init(void)
748 {
749 gameport_register_device(&sw_dev);
750 return 0;
751 }
752
753 void __exit sw_exit(void)
754 {
755 gameport_unregister_device(&sw_dev);
756 }
757
758 module_init(sw_init);
759 module_exit(sw_exit);
760
761 MODULE_LICENSE("GPL");
762