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[PATCH] i386: add memory clobbers to syscall macros
[linux/fpc-iii.git] / drivers / input / joystick / sidewinder.c
blob9e0353721a35d8892e96d5a5779075bafb1b92e5
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);
Linux with added FPC-III support