This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_sysjoystick.c
1241 lines (1086 loc) · 35.6 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
14
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
#ifdef SDL_JOYSTICK_LINUX
26
27
28
29
30
31
/* This is the system specific header for the SDL joystick API */
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
32
#include <limits.h> /* For the definition of PATH_MAX */
33
#include <linux/joystick.h>
34
#if SDL_INPUT_LINUXEV
35
36
37
38
#include <linux/input.h>
#endif
#include "SDL_joystick.h"
39
40
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
41
42
/* Special joystick configurations */
43
44
45
46
47
48
static struct
{
const char *name;
int naxes;
int nhats;
int nballs;
49
} special_joysticks[] = {
50
51
52
53
54
55
56
57
58
59
60
61
{
"MadCatz Panther XL", 3, 2, 1}, /* We don't handle rudder (axis 8) */
{
"SideWinder Precision Pro", 4, 1, 0}, {
"SideWinder 3D Pro", 4, 1, 0}, {
"Microsoft SideWinder 3D Pro", 4, 1, 0}, {
"Microsoft SideWinder Dual Strike USB version 1.0", 2, 1, 0}, {
"WingMan Interceptor", 3, 3, 0}, {
"WingMan Extreme Digital 3D", 4, 1, 0}, {
"Microsoft SideWinder Precision 2 Joystick", 4, 1, 0}, {
"Logitech Inc. WingMan Extreme Digital 3D", 4, 1, 0}, {
"Saitek Saitek X45", 6, 1, 0}
62
63
};
64
65
#ifndef NO_LOGICAL_JOYSTICKS
66
67
68
69
70
71
72
73
74
75
76
/*
Some USB HIDs show up as a single joystick even though they actually
control 2 or more joysticks.
*/
/*
This code handles the MP-8800 (Quad) and MP-8866 (Dual), which can
be identified by their transparent blue design. It's quite trivial
to add other joysticks with similar quirky behavior.
-id
*/
77
78
79
80
struct joystick_logical_mapping
{
int njoy;
int nthing;
81
82
83
84
85
86
87
88
};
/*
{logical joy, logical axis},
{logical joy, logical hat},
{logical joy, logical ball},
{logical joy, logical button}
*/
89
90
static struct joystick_logical_mapping mp88xx_1_logical_axismap[] = {
91
{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}
92
93
};
static struct joystick_logical_mapping mp88xx_1_logical_buttonmap[] = {
94
95
{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}, {0, 8},
{0, 9}, {0, 10}, {0, 11}
96
};
97
98
static struct joystick_logical_mapping mp88xx_2_logical_axismap[] = {
99
100
{0, 0}, {0, 1}, {0, 2}, {1, 0}, {1, 1}, {0, 3},
{1, 2}, {1, 3}, {0, 4}, {0, 5}, {1, 4}, {1, 5}
101
102
};
static struct joystick_logical_mapping mp88xx_2_logical_buttonmap[] = {
103
104
105
106
{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}, {0, 8},
{0, 9}, {0, 10}, {0, 11},
{1, 0}, {1, 1}, {1, 2}, {1, 3}, {1, 4}, {1, 5}, {1, 6}, {1, 7}, {1, 8},
{1, 9}, {1, 10}, {1, 11}
107
};
108
109
static struct joystick_logical_mapping mp88xx_3_logical_axismap[] = {
110
111
112
{0, 0}, {0, 1}, {0, 2}, {1, 0}, {1, 1}, {0, 3},
{1, 2}, {1, 3}, {2, 0}, {2, 1}, {2, 2}, {2, 3},
{0, 4}, {0, 5}, {1, 4}, {1, 5}, {2, 4}, {2, 5}
113
114
};
static struct joystick_logical_mapping mp88xx_3_logical_buttonmap[] = {
115
116
117
118
119
120
{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}, {0, 8},
{0, 9}, {0, 10}, {0, 11},
{1, 0}, {1, 1}, {1, 2}, {1, 3}, {1, 4}, {1, 5}, {1, 6}, {1, 7}, {1, 8},
{1, 9}, {1, 10}, {1, 11},
{2, 0}, {2, 1}, {2, 2}, {2, 3}, {2, 4}, {2, 5}, {2, 6}, {2, 7}, {2, 8},
{2, 9}, {2, 10}, {2, 11}
121
122
123
};
static struct joystick_logical_mapping mp88xx_4_logical_axismap[] = {
124
125
126
127
{0, 0}, {0, 1}, {0, 2}, {1, 0}, {1, 1}, {0, 3},
{1, 2}, {1, 3}, {2, 0}, {2, 1}, {2, 2}, {2, 3},
{3, 0}, {3, 1}, {3, 2}, {3, 3}, {0, 4}, {0, 5},
{1, 4}, {1, 5}, {2, 4}, {2, 5}, {3, 4}, {3, 5}
128
129
};
static struct joystick_logical_mapping mp88xx_4_logical_buttonmap[] = {
130
131
132
133
134
135
136
137
{0, 0}, {0, 1}, {0, 2}, {0, 3}, {0, 4}, {0, 5}, {0, 6}, {0, 7}, {0, 8},
{0, 9}, {0, 10}, {0, 11},
{1, 0}, {1, 1}, {1, 2}, {1, 3}, {1, 4}, {1, 5}, {1, 6}, {1, 7}, {1, 8},
{1, 9}, {1, 10}, {1, 11},
{2, 0}, {2, 1}, {2, 2}, {2, 3}, {2, 4}, {2, 5}, {2, 6}, {2, 7}, {2, 8},
{2, 9}, {2, 10}, {2, 11},
{3, 0}, {3, 1}, {3, 2}, {3, 3}, {3, 4}, {3, 5}, {3, 6}, {3, 7}, {3, 8},
{3, 9}, {3, 10}, {3, 11}
138
139
};
140
141
142
143
144
145
struct joystick_logical_layout
{
int naxes;
int nhats;
int nballs;
int nbuttons;
146
147
148
};
static struct joystick_logical_layout mp88xx_1_logical_layout[] = {
149
{6, 0, 0, 12}
150
151
};
static struct joystick_logical_layout mp88xx_2_logical_layout[] = {
152
153
{6, 0, 0, 12},
{6, 0, 0, 12}
154
155
};
static struct joystick_logical_layout mp88xx_3_logical_layout[] = {
156
157
158
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12}
159
160
};
static struct joystick_logical_layout mp88xx_4_logical_layout[] = {
161
162
163
164
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12}
165
166
167
};
/*
168
169
This array sets up a means of mapping a single physical joystick to
multiple logical joysticks. (djm)
170
171
172
173
174
175
176
177
178
179
njoys
the number of logical joysticks
layouts
an array of layout structures, one to describe each logical joystick
axes, hats, balls, buttons
arrays that map a physical thingy to a logical thingy
*/
180
181
182
183
184
185
186
187
188
189
struct joystick_logicalmap
{
const char *name;
int nbuttons;
int njoys;
struct joystick_logical_layout *layout;
struct joystick_logical_mapping *axismap;
struct joystick_logical_mapping *hatmap;
struct joystick_logical_mapping *ballmap;
struct joystick_logical_mapping *buttonmap;
190
191
192
};
static struct joystick_logicalmap joystick_logicalmap[] = {
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
{
"WiseGroup.,Ltd MP-8866 Dual USB Joypad",
12,
1,
mp88xx_1_logical_layout,
mp88xx_1_logical_axismap,
NULL,
NULL,
mp88xx_1_logical_buttonmap},
{
"WiseGroup.,Ltd MP-8866 Dual USB Joypad",
24,
2,
mp88xx_2_logical_layout,
mp88xx_2_logical_axismap,
NULL,
NULL,
mp88xx_2_logical_buttonmap},
{
"WiseGroup.,Ltd MP-8800 Quad USB Joypad",
12,
1,
mp88xx_1_logical_layout,
mp88xx_1_logical_axismap,
NULL,
NULL,
mp88xx_1_logical_buttonmap},
{
"WiseGroup.,Ltd MP-8800 Quad USB Joypad",
24,
2,
mp88xx_2_logical_layout,
mp88xx_2_logical_axismap,
NULL,
NULL,
mp88xx_2_logical_buttonmap},
{
"WiseGroup.,Ltd MP-8800 Quad USB Joypad",
36,
3,
mp88xx_3_logical_layout,
mp88xx_3_logical_axismap,
NULL,
NULL,
mp88xx_3_logical_buttonmap},
{
"WiseGroup.,Ltd MP-8800 Quad USB Joypad",
48,
4,
mp88xx_4_logical_layout,
mp88xx_4_logical_axismap,
NULL,
NULL,
mp88xx_4_logical_buttonmap}
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
};
/* find the head of a linked list, given a point in it
*/
#define SDL_joylist_head(i, start)\
for(i = start; SDL_joylist[i].fname == NULL;) i = SDL_joylist[i].prev;
#define SDL_logical_joydecl(d) d
#else
#define SDL_logical_joydecl(d)
#endif /* USE_LOGICAL_JOYSTICKS */
263
264
265
266
/* The maximum number of joysticks we'll detect */
#define MAX_JOYSTICKS 32
/* A list of available joysticks */
267
268
static struct
{
269
char *fname;
270
#ifndef NO_LOGICAL_JOYSTICKS
271
272
273
274
275
276
SDL_Joystick *joy;
struct joystick_logicalmap *map;
int prev;
int next;
int logicalno;
#endif /* USE_LOGICAL_JOYSTICKS */
277
278
} SDL_joylist[MAX_JOYSTICKS];
279
280
/* The private structure used to keep track of a joystick */
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
struct joystick_hwdata
{
int fd;
/* The current linux joystick driver maps hats to two axes */
struct hwdata_hat
{
int axis[2];
} *hats;
/* The current linux joystick driver maps balls to two axes */
struct hwdata_ball
{
int axis[2];
} *balls;
/* Support for the Linux 2.4 unified input interface */
296
#if SDL_INPUT_LINUXEV
297
298
299
300
301
302
303
304
SDL_bool is_hid;
Uint8 key_map[KEY_MAX - BTN_MISC];
Uint8 abs_map[ABS_MAX];
struct axis_correct
{
int used;
int coef[3];
} abs_correct[ABS_MAX];
305
306
307
#endif
};
308
309
310
#ifndef NO_LOGICAL_JOYSTICKS
311
312
static int
CountLogicalJoysticks (int max)
313
{
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
register int i, j, k, ret, prev;
const char *name;
int nbuttons, fd;
unsigned char n;
ret = 0;
for (i = 0; i < max; i++) {
name = SDL_SYS_JoystickName (i);
fd = open (SDL_joylist[i].fname, O_RDONLY, 0);
if (fd >= 0) {
if (ioctl (fd, JSIOCGBUTTONS, &n) < 0) {
nbuttons = -1;
} else {
nbuttons = n;
}
close (fd);
} else {
nbuttons = -1;
}
if (name) {
for (j = 0; j < SDL_arraysize (joystick_logicalmap); j++) {
if (!SDL_strcmp (name, joystick_logicalmap[j].name)
&& (nbuttons == -1
|| nbuttons == joystick_logicalmap[j].nbuttons)) {
prev = i;
SDL_joylist[prev].map = &(joystick_logicalmap[j]);
for (k = 1; k < joystick_logicalmap[j].njoys; k++) {
SDL_joylist[prev].next = max + ret;
SDL_joylist[max + ret].prev = prev;
prev = max + ret;
SDL_joylist[prev].logicalno = k;
SDL_joylist[prev].map = &(joystick_logicalmap[j]);
ret++;
}
break;
}
356
}
357
358
}
}
359
360
return ret;
361
362
}
363
364
static void
LogicalSuffix (int logicalno, char *namebuf, int len)
365
{
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
register int slen;
const static char suffixs[] =
"01020304050607080910111213141516171819" "20212223242526272829303132";
const char *suffix;
slen = SDL_strlen (namebuf);
suffix = NULL;
if (logicalno * 2 < sizeof (suffixs))
suffix = suffixs + (logicalno * 2);
if (slen + 4 < len && suffix) {
namebuf[slen++] = ' ';
namebuf[slen++] = '#';
namebuf[slen++] = suffix[0];
namebuf[slen++] = suffix[1];
namebuf[slen++] = 0;
}
383
384
385
386
}
#endif /* USE_LOGICAL_JOYSTICKS */
387
#if SDL_INPUT_LINUXEV
388
389
390
#define test_bit(nr, addr) \
(((1UL << ((nr) & 31)) & (((const unsigned int *) addr)[(nr) >> 5])) != 0)
391
392
static int
EV_IsJoystick (int fd)
393
{
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
unsigned long evbit[40];
unsigned long keybit[40];
unsigned long absbit[40];
if ((ioctl (fd, EVIOCGBIT (0, sizeof (evbit)), evbit) < 0) ||
(ioctl (fd, EVIOCGBIT (EV_KEY, sizeof (keybit)), keybit) < 0) ||
(ioctl (fd, EVIOCGBIT (EV_ABS, sizeof (absbit)), absbit) < 0)) {
return (0);
}
if (!(test_bit (EV_KEY, evbit) && test_bit (EV_ABS, evbit) &&
test_bit (ABS_X, absbit) && test_bit (ABS_Y, absbit) &&
(test_bit (BTN_TRIGGER, keybit) || test_bit (BTN_A, keybit)
|| test_bit (BTN_1, keybit))))
return 0;
return (1);
409
410
}
411
#endif /* SDL_INPUT_LINUXEV */
412
413
/* Function to scan the system for joysticks */
414
415
int
SDL_SYS_JoystickInit (void)
416
{
417
418
/* The base path of the joystick devices */
const char *joydev_pattern[] = {
419
#if SDL_INPUT_LINUXEV
420
"/dev/input/event%d",
421
#endif
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
"/dev/input/js%d",
"/dev/js%d"
};
int numjoysticks;
int i, j;
int fd;
char path[PATH_MAX];
dev_t dev_nums[MAX_JOYSTICKS]; /* major/minor device numbers */
struct stat sb;
int n, duplicate;
numjoysticks = 0;
/* First see if the user specified a joystick to use */
if (SDL_getenv ("SDL_JOYSTICK_DEVICE") != NULL) {
SDL_strlcpy (path, SDL_getenv ("SDL_JOYSTICK_DEVICE"), sizeof (path));
if (stat (path, &sb) == 0) {
fd = open (path, O_RDONLY, 0);
if (fd >= 0) {
/* Assume the user knows what they're doing. */
SDL_joylist[numjoysticks].fname = SDL_strdup (path);
if (SDL_joylist[numjoysticks].fname) {
dev_nums[numjoysticks] = sb.st_rdev;
++numjoysticks;
}
close (fd);
}
}
}
for (i = 0; i < SDL_arraysize (joydev_pattern); ++i) {
for (j = 0; j < MAX_JOYSTICKS; ++j) {
SDL_snprintf (path, SDL_arraysize (path), joydev_pattern[i], j);
/* rcg06302000 replaced access(F_OK) call with stat().
* stat() will fail if the file doesn't exist, so it's
* equivalent behaviour.
*/
if (stat (path, &sb) == 0) {
/* Check to make sure it's not already in list.
* This happens when we see a stick via symlink.
*/
duplicate = 0;
for (n = 0; (n < numjoysticks) && !duplicate; ++n) {
if (sb.st_rdev == dev_nums[n]) {
duplicate = 1;
}
}
if (duplicate) {
continue;
}
fd = open (path, O_RDONLY, 0);
if (fd < 0) {
continue;
}
478
#if SDL_INPUT_LINUXEV
479
#ifdef DEBUG_INPUT_EVENTS
480
printf ("Checking %s\n", path);
481
#endif
482
483
484
485
if ((i == 0) && !EV_IsJoystick (fd)) {
close (fd);
continue;
}
486
#endif
487
488
489
490
491
492
493
494
495
496
497
close (fd);
/* We're fine, add this joystick */
SDL_joylist[numjoysticks].fname = SDL_strdup (path);
if (SDL_joylist[numjoysticks].fname) {
dev_nums[numjoysticks] = sb.st_rdev;
++numjoysticks;
}
} else
break;
}
498
499
#if SDL_INPUT_LINUXEV
500
501
502
503
504
505
506
507
508
/* This is a special case...
If the event devices are valid then the joystick devices
will be duplicates but without extra information about their
hats or balls. Unfortunately, the event devices can't
currently be calibrated, so it's a win-lose situation.
So : /dev/input/eventX = /dev/input/jsY = /dev/jsY
*/
if ((i == 0) && (numjoysticks > 0))
break;
509
#endif
510
}
511
#ifndef NO_LOGICAL_JOYSTICKS
512
numjoysticks += CountLogicalJoysticks (numjoysticks);
513
#endif
514
515
return (numjoysticks);
516
517
518
}
/* Function to get the device-dependent name of a joystick */
519
520
const char *
SDL_SYS_JoystickName (int index)
521
{
522
523
524
525
int fd;
static char namebuf[128];
char *name;
SDL_logical_joydecl (int oindex = index);
526
527
#ifndef NO_LOGICAL_JOYSTICKS
528
SDL_joylist_head (index, index);
529
#endif
530
531
532
533
name = NULL;
fd = open (SDL_joylist[index].fname, O_RDONLY, 0);
if (fd >= 0) {
if (
534
#if SDL_INPUT_LINUXEV
535
(ioctl (fd, EVIOCGNAME (sizeof (namebuf)), namebuf) <= 0) &&
536
#endif
537
538
539
540
541
542
(ioctl (fd, JSIOCGNAME (sizeof (namebuf)), namebuf) <= 0)) {
name = SDL_joylist[index].fname;
} else {
name = namebuf;
}
close (fd);
543
544
545
#ifndef NO_LOGICAL_JOYSTICKS
546
547
548
549
if (SDL_joylist[oindex].prev || SDL_joylist[oindex].next
|| index != oindex) {
LogicalSuffix (SDL_joylist[oindex].logicalno, namebuf, 128);
}
550
#endif
551
552
}
return name;
553
554
}
555
556
static int
allocate_hatdata (SDL_Joystick * joystick)
557
{
558
559
560
561
562
563
564
565
566
567
568
569
570
int i;
joystick->hwdata->hats =
(struct hwdata_hat *) SDL_malloc (joystick->nhats *
sizeof (struct hwdata_hat));
if (joystick->hwdata->hats == NULL) {
return (-1);
}
for (i = 0; i < joystick->nhats; ++i) {
joystick->hwdata->hats[i].axis[0] = 1;
joystick->hwdata->hats[i].axis[1] = 1;
}
return (0);
571
572
}
573
574
static int
allocate_balldata (SDL_Joystick * joystick)
575
{
576
577
578
579
580
581
582
583
584
585
586
587
588
int i;
joystick->hwdata->balls =
(struct hwdata_ball *) SDL_malloc (joystick->nballs *
sizeof (struct hwdata_ball));
if (joystick->hwdata->balls == NULL) {
return (-1);
}
for (i = 0; i < joystick->nballs; ++i) {
joystick->hwdata->balls[i].axis[0] = 0;
joystick->hwdata->balls[i].axis[1] = 0;
}
return (0);
589
590
}
591
592
static SDL_bool
JS_ConfigJoystick (SDL_Joystick * joystick, int fd)
593
{
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
SDL_bool handled;
unsigned char n;
int old_axes, tmp_naxes, tmp_nhats, tmp_nballs;
const char *name;
char *env, env_name[128];
int i;
handled = SDL_FALSE;
/* Default joystick device settings */
if (ioctl (fd, JSIOCGAXES, &n) < 0) {
joystick->naxes = 2;
} else {
joystick->naxes = n;
}
if (ioctl (fd, JSIOCGBUTTONS, &n) < 0) {
joystick->nbuttons = 2;
} else {
joystick->nbuttons = n;
}
name = SDL_SYS_JoystickName (joystick->index);
old_axes = joystick->naxes;
/* Generic analog joystick support */
if (SDL_strstr (name, "Analog") == name && SDL_strstr (name, "-hat")) {
if (SDL_sscanf (name, "Analog %d-axis %*d-button %d-hat",
&tmp_naxes, &tmp_nhats) == 2) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
handled = SDL_TRUE;
}
}
/* Special joystick support */
for (i = 0; i < SDL_arraysize (special_joysticks); ++i) {
if (SDL_strcmp (name, special_joysticks[i].name) == 0) {
joystick->naxes = special_joysticks[i].naxes;
joystick->nhats = special_joysticks[i].nhats;
joystick->nballs = special_joysticks[i].nballs;
handled = SDL_TRUE;
break;
}
}
/* User environment joystick support */
if ((env = SDL_getenv ("SDL_LINUX_JOYSTICK"))) {
*env_name = '\0';
if (*env == '\'' && SDL_sscanf (env, "'%[^']s'", env_name) == 1)
env += SDL_strlen (env_name) + 2;
else if (SDL_sscanf (env, "%s", env_name) == 1)
env += SDL_strlen (env_name);
if (SDL_strcmp (name, env_name) == 0) {
if (SDL_sscanf (env, "%d %d %d", &tmp_naxes, &tmp_nhats,
&tmp_nballs) == 3) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
joystick->nballs = tmp_nballs;
handled = SDL_TRUE;
}
}
}
/* Remap hats and balls */
if (handled) {
if (joystick->nhats > 0) {
if (allocate_hatdata (joystick) < 0) {
joystick->nhats = 0;
}
}
if (joystick->nballs > 0) {
if (allocate_balldata (joystick) < 0) {
joystick->nballs = 0;
}
}
}
return (handled);
680
681
}
682
#if SDL_INPUT_LINUXEV
683
684
685
static SDL_bool
EV_ConfigJoystick (SDL_Joystick * joystick, int fd)
686
{
687
688
689
690
691
692
693
694
695
696
697
698
699
700
int i, t;
unsigned long keybit[40];
unsigned long absbit[40];
unsigned long relbit[40];
/* See if this device uses the new unified event API */
if ((ioctl (fd, EVIOCGBIT (EV_KEY, sizeof (keybit)), keybit) >= 0) &&
(ioctl (fd, EVIOCGBIT (EV_ABS, sizeof (absbit)), absbit) >= 0) &&
(ioctl (fd, EVIOCGBIT (EV_REL, sizeof (relbit)), relbit) >= 0)) {
joystick->hwdata->is_hid = SDL_TRUE;
/* Get the number of buttons, axes, and other thingamajigs */
for (i = BTN_JOYSTICK; i < KEY_MAX; ++i) {
if (test_bit (i, keybit)) {
701
#ifdef DEBUG_INPUT_EVENTS
702
printf ("Joystick has button: 0x%x\n", i);
703
#endif
704
705
706
707
708
709
joystick->hwdata->key_map[i - BTN_MISC] = joystick->nbuttons;
++joystick->nbuttons;
}
}
for (i = BTN_MISC; i < BTN_JOYSTICK; ++i) {
if (test_bit (i, keybit)) {
710
#ifdef DEBUG_INPUT_EVENTS
711
printf ("Joystick has button: 0x%x\n", i);
712
#endif
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
joystick->hwdata->key_map[i - BTN_MISC] = joystick->nbuttons;
++joystick->nbuttons;
}
}
for (i = 0; i < ABS_MAX; ++i) {
/* Skip hats */
if (i == ABS_HAT0X) {
i = ABS_HAT3Y;
continue;
}
if (test_bit (i, absbit)) {
int values[5];
if (ioctl (fd, EVIOCGABS (i), values) < 0)
continue;
728
#ifdef DEBUG_INPUT_EVENTS
729
730
731
732
printf ("Joystick has absolute axis: %x\n", i);
printf ("Values = { %d, %d, %d, %d, %d }\n",
values[0], values[1],
values[2], values[3], values[4]);
733
#endif /* DEBUG_INPUT_EVENTS */
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
joystick->hwdata->abs_map[i] = joystick->naxes;
if (values[1] == values[2]) {
joystick->hwdata->abs_correct[i].used = 0;
} else {
joystick->hwdata->abs_correct[i].used = 1;
joystick->hwdata->abs_correct[i].coef[0] =
(values[2] + values[1]) / 2 - values[4];
joystick->hwdata->abs_correct[i].coef[1] =
(values[2] + values[1]) / 2 + values[4];
t = ((values[2] - values[1]) / 2 - 2 * values[4]);
if (t != 0) {
joystick->hwdata->abs_correct[i].coef[2] =
(1 << 29) / t;
} else {
joystick->hwdata->abs_correct[i].coef[2] = 0;
}
}
++joystick->naxes;
}
}
for (i = ABS_HAT0X; i <= ABS_HAT3Y; i += 2) {
if (test_bit (i, absbit) || test_bit (i + 1, absbit)) {
756
#ifdef DEBUG_INPUT_EVENTS
757
printf ("Joystick has hat %d\n", (i - ABS_HAT0X) / 2);
758
#endif
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
++joystick->nhats;
}
}
if (test_bit (REL_X, relbit) || test_bit (REL_Y, relbit)) {
++joystick->nballs;
}
/* Allocate data to keep track of these thingamajigs */
if (joystick->nhats > 0) {
if (allocate_hatdata (joystick) < 0) {
joystick->nhats = 0;
}
}
if (joystick->nballs > 0) {
if (allocate_balldata (joystick) < 0) {
joystick->nballs = 0;
}
}
}
return (joystick->hwdata->is_hid);
779
780
}
781
#endif /* SDL_INPUT_LINUXEV */
782
783
#ifndef NO_LOGICAL_JOYSTICKS
784
785
static void
ConfigLogicalJoystick (SDL_Joystick * joystick)
786
{
787
788
789
790
791
792
793
794
795
struct joystick_logical_layout *layout;
layout = SDL_joylist[joystick->index].map->layout +
SDL_joylist[joystick->index].logicalno;
joystick->nbuttons = layout->nbuttons;
joystick->nhats = layout->nhats;
joystick->naxes = layout->naxes;
joystick->nballs = layout->nballs;
796
797
798
799
}
#endif
800
801
802
803
804
/* Function to open a joystick for use.
The joystick to open is specified by the index field of the joystick.
This should fill the nbuttons and naxes fields of the joystick structure.
It returns 0, or -1 if there is an error.
*/
805
806
int
SDL_SYS_JoystickOpen (SDL_Joystick * joystick)
807
{
808
809
810
int fd;
SDL_logical_joydecl (int realindex);
SDL_logical_joydecl (SDL_Joystick * realjoy = NULL);
811
812
/* Open the joystick and set the joystick file descriptor */
813
#ifndef NO_LOGICAL_JOYSTICKS
814
815
816
if (SDL_joylist[joystick->index].fname == NULL) {
SDL_joylist_head (realindex, joystick->index);
realjoy = SDL_JoystickOpen (realindex);
817
818
819
820
821
if (realjoy == NULL)
return (-1);
fd = realjoy->hwdata->fd;
822
823
824
825
826
} else {
fd = open (SDL_joylist[joystick->index].fname, O_RDONLY, 0);
}
SDL_joylist[joystick->index].joy = joystick;
827
#else
828
fd = open (SDL_joylist[joystick->index].fname, O_RDONLY, 0);
829
830
#endif
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
if (fd < 0) {
SDL_SetError ("Unable to open %s\n", SDL_joylist[joystick->index]);
return (-1);
}
joystick->hwdata = (struct joystick_hwdata *)
SDL_malloc (sizeof (*joystick->hwdata));
if (joystick->hwdata == NULL) {
SDL_OutOfMemory ();
close (fd);
return (-1);
}
SDL_memset (joystick->hwdata, 0, sizeof (*joystick->hwdata));
joystick->hwdata->fd = fd;
/* Set the joystick to non-blocking read mode */
fcntl (fd, F_SETFL, O_NONBLOCK);
/* Get the number of buttons and axes on the joystick */
849
#ifndef NO_LOGICAL_JOYSTICKS
850
851
852
if (realjoy)
ConfigLogicalJoystick (joystick);
else
853
#endif
854
#if SDL_INPUT_LINUXEV
855
if (!EV_ConfigJoystick (joystick, fd))
856
#endif
857
JS_ConfigJoystick (joystick, fd);
858
859
return (0);
860
861
}
862
863
#ifndef NO_LOGICAL_JOYSTICKS
864
865
866
static SDL_Joystick *
FindLogicalJoystick (SDL_Joystick * joystick,
struct joystick_logical_mapping *v)
867
{
868
869
SDL_Joystick *logicaljoy;
register int i;
870
871
872
i = joystick->index;
logicaljoy = NULL;
873
874
875
876
/* get the fake joystick that will receive the event
*/
for (;;) {
877
878
879
880
881
if (SDL_joylist[i].logicalno == v->njoy) {
logicaljoy = SDL_joylist[i].joy;
break;
}
882
883
884
if (SDL_joylist[i].next == 0)
break;
885
886
i = SDL_joylist[i].next;
887
888
}
889
890
return logicaljoy;
891
892
}
893
894
895
896
897
static int
LogicalJoystickButton (SDL_Joystick * joystick, Uint8 button, Uint8 state)
{
struct joystick_logical_mapping *buttons;
SDL_Joystick *logicaljoy = NULL;
898
899
900
901
902
/* if there's no map then this is just a regular joystick
*/
if (SDL_joylist[joystick->index].map == NULL)
return 0;
903
904
905
906
907
/* get the logical joystick that will receive the event
*/
buttons = SDL_joylist[joystick->index].map->buttonmap + button;
logicaljoy = FindLogicalJoystick (joystick, buttons);
908
909
910
if (logicaljoy == NULL)
return 1;
911
912
SDL_PrivateJoystickButton (logicaljoy, buttons->nthing, state);
913
914
return 1;
915
916
}
917
918
static int
LogicalJoystickAxis (SDL_Joystick * joystick, Uint8 axis, Sint16 value)
919
{
920
921
struct joystick_logical_mapping *axes;
SDL_Joystick *logicaljoy = NULL;
922
923
924
925
926
/* if there's no map then this is just a regular joystick
*/
if (SDL_joylist[joystick->index].map == NULL)
return 0;
927
928
929
930
931
/* get the logical joystick that will receive the event
*/
axes = SDL_joylist[joystick->index].map->axismap + axis;
logicaljoy = FindLogicalJoystick (joystick, axes);
932
933
934
if (logicaljoy == NULL)
return 1;
935
936
SDL_PrivateJoystickAxis (logicaljoy, axes->nthing, value);
937
938
return 1;
939
940
941
}
#endif /* USE_LOGICAL_JOYSTICKS */
942
943
static __inline__ void
HandleHat (SDL_Joystick * stick, Uint8 hat, int axis, int value)
944
{
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
struct hwdata_hat *the_hat;
const Uint8 position_map[3][3] = {
{SDL_HAT_LEFTUP, SDL_HAT_UP, SDL_HAT_RIGHTUP},
{SDL_HAT_LEFT, SDL_HAT_CENTERED, SDL_HAT_RIGHT},
{SDL_HAT_LEFTDOWN, SDL_HAT_DOWN, SDL_HAT_RIGHTDOWN}
};
SDL_logical_joydecl (SDL_Joystick * logicaljoy = NULL);
SDL_logical_joydecl (struct joystick_logical_mapping *hats = NULL);
the_hat = &stick->hwdata->hats[hat];
if (value < 0) {
value = 0;
} else if (value == 0) {
value = 1;
} else if (value > 0) {
value = 2;
}
if (value != the_hat->axis[axis]) {
the_hat->axis[axis] = value;
964
965
#ifndef NO_LOGICAL_JOYSTICKS
966
967
968
969
970
971
972
973
974
975
976
977
978
979
/* if there's no map then this is just a regular joystick
*/
if (SDL_joylist[stick->index].map != NULL) {
/* get the fake joystick that will receive the event
*/
hats = SDL_joylist[stick->index].map->hatmap + hat;
logicaljoy = FindLogicalJoystick (stick, hats);
}
if (logicaljoy) {
stick = logicaljoy;
hat = hats->nthing;
}
980
981
#endif /* USE_LOGICAL_JOYSTICKS */
982
983
984
985
SDL_PrivateJoystickHat (stick, hat,
position_map[the_hat->axis[1]][the_hat->
axis[0]]);
}
986
987
}
988
989
static __inline__ void
HandleBall (SDL_Joystick * stick, Uint8 ball, int axis, int value)
990
{
991
stick->hwdata->balls[ball].axis[axis] += value;
992
993
994
995
996
997
998
}
/* Function to update the state of a joystick - called as a device poll.
* This function shouldn't update the joystick structure directly,
* but instead should call SDL_PrivateJoystick*() to deliver events
* and update joystick device state.
*/
999
1000
static __inline__ void
JS_HandleEvents (SDL_Joystick * joystick)