/
SDL_sysjoystick.c
1218 lines (1062 loc) · 31.3 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2012 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
32
33
/* 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>
#include <limits.h> /* For the definition of PATH_MAX */
#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
43
44
45
46
47
48
49
50
51
52
/* Special joystick configurations */
static struct {
const char *name;
int naxes;
int nhats;
int nballs;
} special_joysticks[] = {
{ "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 },
53
{ "Microsoft SideWinder Precision Pro", 4, 1, 0 },
54
55
56
57
58
59
{ "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 }
60
61
};
62
63
64
/* It looks like newer kernels have the logical mapping at the driver level */
#define NO_LOGICAL_JOYSTICKS
65
66
#ifndef NO_LOGICAL_JOYSTICKS
67
68
69
70
71
72
73
74
75
76
77
78
/*
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
*/
struct joystick_logical_mapping {
79
80
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
91
92
93
94
95
static struct joystick_logical_mapping mp88xx_1_logical_axismap[] = {
{0,0},{0,1},{0,2},{0,3},{0,4},{0,5}
};
static struct joystick_logical_mapping mp88xx_1_logical_buttonmap[] = {
{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
99
100
101
102
103
104
static struct joystick_logical_mapping mp88xx_2_logical_axismap[] = {
{0,0},{0,1},{0,2},{1,0},{1,1},{0,3},
{1,2},{1,3},{0,4},{0,5},{1,4},{1,5}
};
static struct joystick_logical_mapping mp88xx_2_logical_buttonmap[] = {
{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}
};
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
static struct joystick_logical_mapping mp88xx_3_logical_axismap[] = {
{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}
};
static struct joystick_logical_mapping mp88xx_3_logical_buttonmap[] = {
{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}
};
static struct joystick_logical_mapping mp88xx_4_logical_axismap[] = {
{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}
};
static struct joystick_logical_mapping mp88xx_4_logical_buttonmap[] = {
124
125
126
{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},
127
{3,0},{3,1},{3,2},{3,3},{3,4},{3,5},{3,6},{3,7},{3,8},{3,9},{3,10},{3,11}
128
129
};
130
struct joystick_logical_layout {
131
132
133
134
int naxes;
int nhats;
int nballs;
int nbuttons;
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
};
static struct joystick_logical_layout mp88xx_1_logical_layout[] = {
{6, 0, 0, 12}
};
static struct joystick_logical_layout mp88xx_2_logical_layout[] = {
{6, 0, 0, 12},
{6, 0, 0, 12}
};
static struct joystick_logical_layout mp88xx_3_logical_layout[] = {
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12}
};
static struct joystick_logical_layout mp88xx_4_logical_layout[] = {
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12},
{6, 0, 0, 12}
154
155
156
};
/*
157
158
This array sets up a means of mapping a single physical joystick to
multiple logical joysticks. (djm)
159
160
161
162
163
164
165
166
167
168
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
*/
169
struct joystick_logicalmap {
170
const char *name;
171
int nbuttons;
172
int njoys;
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
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
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;
};
static struct joystick_logicalmap joystick_logicalmap[] = {
{
"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
}
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
};
/* 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 */
257
258
259
260
/* The maximum number of joysticks we'll detect */
#define MAX_JOYSTICKS 32
/* A list of available joysticks */
261
262
263
264
265
266
267
268
269
270
271
272
static struct
{
char* fname;
#ifndef NO_LOGICAL_JOYSTICKS
SDL_Joystick* joy;
struct joystick_logicalmap* map;
int prev;
int next;
int logicalno;
#endif /* USE_LOGICAL_JOYSTICKS */
} SDL_joylist[MAX_JOYSTICKS];
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/* The private structure used to keep track of a joystick */
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 */
287
#if SDL_INPUT_LINUXEV
288
SDL_bool is_hid;
289
290
291
292
293
294
295
296
297
Uint8 key_map[KEY_MAX-BTN_MISC];
Uint8 abs_map[ABS_MAX];
struct axis_correct {
int used;
int coef[3];
} abs_correct[ABS_MAX];
#endif
};
298
299
300
301
302
303
304
#ifndef NO_LOGICAL_JOYSTICKS
static int CountLogicalJoysticks(int max)
{
register int i, j, k, ret, prev;
const char* name;
305
306
int nbuttons, fd;
unsigned char n;
307
308
309
310
311
ret = 0;
for(i = 0; i < max; i++) {
name = SDL_SYS_JoystickName(i);
312
313
314
315
316
317
318
319
320
321
322
323
324
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;
}
325
326
if (name) {
327
for(j = 0; j < SDL_arraysize(joystick_logicalmap); j++) {
328
if (!SDL_strcmp(name, joystick_logicalmap[j].name) && (nbuttons==-1 || nbuttons==joystick_logicalmap[j].nbuttons)) {
329
prev = i;
330
SDL_joylist[prev].map = &(joystick_logicalmap[j]);
331
332
333
for(k = 1; k < joystick_logicalmap[j].njoys; k++) {
SDL_joylist[prev].next = max + ret;
334
335
SDL_joylist[max+ret].prev = prev;
336
337
prev = max + ret;
SDL_joylist[prev].logicalno = k;
338
SDL_joylist[prev].map = &(joystick_logicalmap[j]);
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
ret++;
}
break;
}
}
}
}
return ret;
}
static void LogicalSuffix(int logicalno, char* namebuf, int len)
{
register int slen;
const static char suffixs[] =
"01020304050607080910111213141516171819"
"20212223242526272829303132";
const char* suffix;
358
slen = SDL_strlen(namebuf);
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
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;
}
}
#endif /* USE_LOGICAL_JOYSTICKS */
375
#if SDL_INPUT_LINUXEV
376
#define test_bit(nr, addr) \
377
378
(((1UL << ((nr) % (sizeof(long) * 8))) & ((addr)[(nr) / (sizeof(long) * 8)])) != 0)
#define NBITS(x) ((((x)-1)/(sizeof(long) * 8))+1)
379
380
381
static int EV_IsJoystick(int fd)
{
382
383
384
unsigned long evbit[NBITS(EV_MAX)] = { 0 };
unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
385
386
387
388
389
390
391
392
393
394
395
396
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);
}
397
#endif /* SDL_INPUT_LINUXEV */
398
399
400
401
402
/* Function to scan the system for joysticks */
int SDL_SYS_JoystickInit(void)
{
/* The base path of the joystick devices */
403
const char *joydev_pattern[] = {
404
#if SDL_INPUT_LINUXEV
405
"/dev/input/event%d",
406
#endif
407
408
"/dev/input/js%d",
"/dev/js%d"
409
410
};
int numjoysticks;
411
int i, j;
412
413
414
415
416
417
418
419
int fd;
char path[PATH_MAX];
dev_t dev_nums[MAX_JOYSTICKS]; /* major/minor device numbers */
struct stat sb;
int n, duplicate;
numjoysticks = 0;
420
/* First see if the user specified one or more joysticks to use */
421
if ( SDL_getenv("SDL_JOYSTICK_DEVICE") != NULL ) {
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
char *envcopy, *envpath, *delim;
envcopy = SDL_strdup(SDL_getenv("SDL_JOYSTICK_DEVICE"));
envpath = envcopy;
while ( envpath != NULL ) {
delim = SDL_strchr(envpath, ':');
if ( delim != NULL ) {
*delim++ = '\0';
}
if ( stat(envpath, &sb) == 0 ) {
fd = open(envpath, O_RDONLY, 0);
if ( fd >= 0 ) {
/* Assume the user knows what they're doing. */
SDL_joylist[numjoysticks].fname = SDL_strdup(envpath);
if ( SDL_joylist[numjoysticks].fname ) {
dev_nums[numjoysticks] = sb.st_rdev;
++numjoysticks;
}
close(fd);
440
441
}
}
442
envpath = delim;
443
}
444
SDL_free(envcopy);
445
}
446
447
for ( i=0; i<SDL_arraysize(joydev_pattern); ++i ) {
448
for ( j=0; j < MAX_JOYSTICKS; ++j ) {
449
SDL_snprintf(path, SDL_arraysize(path), joydev_pattern[i], j);
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
/* 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;
}
473
#if SDL_INPUT_LINUXEV
474
475
476
#ifdef DEBUG_INPUT_EVENTS
printf("Checking %s\n", path);
#endif
477
if ( (i == 0) && ! EV_IsJoystick(fd) ) {
478
479
480
481
482
483
484
close(fd);
continue;
}
#endif
close(fd);
/* We're fine, add this joystick */
485
SDL_joylist[numjoysticks].fname = SDL_strdup(path);
486
if ( SDL_joylist[numjoysticks].fname ) {
487
488
489
dev_nums[numjoysticks] = sb.st_rdev;
++numjoysticks;
}
491
}
492
493
#if SDL_INPUT_LINUXEV
494
495
496
497
498
499
500
501
502
503
/* 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;
#endif
504
}
505
506
507
#ifndef NO_LOGICAL_JOYSTICKS
numjoysticks += CountLogicalJoysticks(numjoysticks);
#endif
508
509
510
511
512
513
514
515
516
517
return(numjoysticks);
}
/* Function to get the device-dependent name of a joystick */
const char *SDL_SYS_JoystickName(int index)
{
int fd;
static char namebuf[128];
char *name;
518
SDL_logical_joydecl(int oindex = index);
519
520
521
522
#ifndef NO_LOGICAL_JOYSTICKS
SDL_joylist_head(index, index);
#endif
523
name = NULL;
524
fd = open(SDL_joylist[index].fname, O_RDONLY, 0);
525
526
if ( fd >= 0 ) {
if (
527
#if SDL_INPUT_LINUXEV
528
529
530
(ioctl(fd, EVIOCGNAME(sizeof(namebuf)), namebuf) <= 0) &&
#endif
(ioctl(fd, JSIOCGNAME(sizeof(namebuf)), namebuf) <= 0) ) {
531
name = SDL_joylist[index].fname;
532
533
534
535
} else {
name = namebuf;
}
close(fd);
536
537
538
#ifndef NO_LOGICAL_JOYSTICKS
539
540
if (SDL_joylist[oindex].prev || SDL_joylist[oindex].next || index!=oindex)
{
541
LogicalSuffix(SDL_joylist[oindex].logicalno, namebuf, 128);
542
}
543
#endif
544
545
546
547
548
549
550
551
}
return name;
}
static int allocate_hatdata(SDL_Joystick *joystick)
{
int i;
552
joystick->hwdata->hats = (struct hwdata_hat *)SDL_malloc(
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
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);
}
static int allocate_balldata(SDL_Joystick *joystick)
{
int i;
568
joystick->hwdata->balls = (struct hwdata_ball *)SDL_malloc(
569
570
571
572
573
574
575
576
577
578
579
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);
}
580
static SDL_bool JS_ConfigJoystick(SDL_Joystick *joystick, int fd)
581
582
{
SDL_bool handled;
583
unsigned char n;
584
int tmp_naxes, tmp_nhats, tmp_nballs;
585
586
587
588
589
const char *name;
char *env, env_name[128];
int i;
handled = SDL_FALSE;
590
591
592
593
594
595
/* Default joystick device settings */
if ( ioctl(fd, JSIOCGAXES, &n) < 0 ) {
joystick->naxes = 2;
} else {
joystick->naxes = n;
596
}
597
598
if ( ioctl(fd, JSIOCGBUTTONS, &n) < 0 ) {
joystick->nbuttons = 2;
599
} else {
600
joystick->nbuttons = n;
601
602
}
603
604
605
name = SDL_SYS_JoystickName(joystick->index);
/* Generic analog joystick support */
606
607
if ( SDL_strstr(name, "Analog") == name && SDL_strstr(name, "-hat") ) {
if ( SDL_sscanf(name,"Analog %d-axis %*d-button %d-hat",
608
609
610
611
612
613
614
615
616
617
&tmp_naxes, &tmp_nhats) == 2 ) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
handled = SDL_TRUE;
}
}
/* Special joystick support */
618
for ( i=0; i < SDL_arraysize(special_joysticks); ++i ) {
619
if ( SDL_strcmp(name, special_joysticks[i].name) == 0 ) {
620
621
622
623
624
625
626
627
628
629
630
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 */
631
if ( (env = SDL_getenv("SDL_LINUX_JOYSTICK")) ) {
632
*env_name = '\0';
633
634
635
636
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);
637
638
if ( SDL_strcmp(name, env_name) == 0 ) {
639
640
if ( SDL_sscanf(env, "%d %d %d", &tmp_naxes, &tmp_nhats,
641
642
643
644
645
646
647
648
649
650
651
652
653
&tmp_nballs) == 3 ) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
joystick->nballs = tmp_nballs;
handled = SDL_TRUE;
}
}
}
/* Remap hats and balls */
if (handled) {
654
if ( joystick->nhats > 0 ) {
655
656
if ( allocate_hatdata(joystick) < 0 ) {
joystick->nhats = 0;
657
658
659
660
661
662
663
664
}
}
if ( joystick->nballs > 0 ) {
if ( allocate_balldata(joystick) < 0 ) {
joystick->nballs = 0;
}
}
}
665
666
667
668
return(handled);
}
669
#if SDL_INPUT_LINUXEV
670
671
672
static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd)
{
673
int i, t;
674
675
676
unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
unsigned long relbit[NBITS(REL_MAX)] = { 0 };
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
/* 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) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i-BTN_MISC] =
joystick->nbuttons;
++joystick->nbuttons;
}
}
for ( i=BTN_MISC; i < BTN_JOYSTICK; ++i ) {
if ( test_bit(i, keybit) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i-BTN_MISC] =
joystick->nbuttons;
++joystick->nbuttons;
}
}
705
for ( i=0; i<ABS_MISC; ++i ) {
706
707
708
709
710
711
/* Skip hats */
if ( i == ABS_HAT0X ) {
i = ABS_HAT3Y;
continue;
}
if ( test_bit(i, absbit) ) {
712
struct input_absinfo absinfo;
713
714
if ( ioctl(fd, EVIOCGABS(i), &absinfo) < 0 )
715
continue;
716
717
718
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has absolute axis: %x\n", i);
printf("Values = { %d, %d, %d, %d, %d }\n",
719
720
absinfo.value, absinfo.minimum,
absinfo.maximum, absinfo.fuzz, absinfo.flat);
721
722
#endif /* DEBUG_INPUT_EVENTS */
joystick->hwdata->abs_map[i] = joystick->naxes;
723
if ( absinfo.minimum == absinfo.maximum ) {
724
725
726
joystick->hwdata->abs_correct[i].used = 0;
} else {
joystick->hwdata->abs_correct[i].used = 1;
727
joystick->hwdata->abs_correct[i].coef[0] =
728
(absinfo.maximum + absinfo.minimum) / 2 - absinfo.flat;
729
joystick->hwdata->abs_correct[i].coef[1] =
730
731
(absinfo.maximum + absinfo.minimum) / 2 + absinfo.flat;
t = ((absinfo.maximum - absinfo.minimum) / 2 - 2 * absinfo.flat);
732
733
if ( t != 0 ) {
joystick->hwdata->abs_correct[i].coef[2] = (1 << 29) / t;
734
735
} else {
joystick->hwdata->abs_correct[i].coef[2] = 0;
736
}
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
}
++joystick->naxes;
}
}
for ( i=ABS_HAT0X; i <= ABS_HAT3Y; i += 2 ) {
if ( test_bit(i, absbit) || test_bit(i+1, absbit) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has hat %d\n",(i-ABS_HAT0X)/2);
#endif
++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);
}
768
#endif /* SDL_INPUT_LINUXEV */
769
770
771
772
773
774
#ifndef NO_LOGICAL_JOYSTICKS
static void ConfigLogicalJoystick(SDL_Joystick *joystick)
{
struct joystick_logical_layout* layout;
775
layout = SDL_joylist[joystick->index].map->layout +
776
777
778
779
780
781
782
783
784
785
SDL_joylist[joystick->index].logicalno;
joystick->nbuttons = layout->nbuttons;
joystick->nhats = layout->nhats;
joystick->naxes = layout->naxes;
joystick->nballs = layout->nballs;
}
#endif
786
787
788
789
790
791
792
793
/* 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.
*/
int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
{
int fd;
794
795
SDL_logical_joydecl(int realindex);
SDL_logical_joydecl(SDL_Joystick *realjoy = NULL);
796
797
/* Open the joystick and set the joystick file descriptor */
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
#ifndef NO_LOGICAL_JOYSTICKS
if (SDL_joylist[joystick->index].fname == NULL) {
SDL_joylist_head(realindex, joystick->index);
realjoy = SDL_JoystickOpen(realindex);
if (realjoy == NULL)
return(-1);
fd = realjoy->hwdata->fd;
} else {
fd = open(SDL_joylist[joystick->index].fname, O_RDONLY, 0);
}
SDL_joylist[joystick->index].joy = joystick;
#else
fd = open(SDL_joylist[joystick->index].fname, O_RDONLY, 0);
#endif
816
817
818
819
820
821
if ( fd < 0 ) {
SDL_SetError("Unable to open %s\n",
SDL_joylist[joystick->index]);
return(-1);
}
joystick->hwdata = (struct joystick_hwdata *)
822
SDL_malloc(sizeof(*joystick->hwdata));
823
824
825
826
827
if ( joystick->hwdata == NULL ) {
SDL_OutOfMemory();
close(fd);
return(-1);
}
828
SDL_memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
829
830
831
832
833
834
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 */
835
836
837
838
839
#ifndef NO_LOGICAL_JOYSTICKS
if (realjoy)
ConfigLogicalJoystick(joystick);
else
#endif
840
#if SDL_INPUT_LINUXEV
841
842
if ( ! EV_ConfigJoystick(joystick, fd) )
#endif
843
844
JS_ConfigJoystick(joystick, fd);
845
846
847
return(0);
}
848
849
850
#ifndef NO_LOGICAL_JOYSTICKS
static SDL_Joystick* FindLogicalJoystick(
851
SDL_Joystick *joystick, struct joystick_logical_mapping* v)
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
{
SDL_Joystick *logicaljoy;
register int i;
i = joystick->index;
logicaljoy = NULL;
/* get the fake joystick that will receive the event
*/
for(;;) {
if (SDL_joylist[i].logicalno == v->njoy) {
logicaljoy = SDL_joylist[i].joy;
break;
}
if (SDL_joylist[i].next == 0)
break;
i = SDL_joylist[i].next;
}
return logicaljoy;
}
static int LogicalJoystickButton(
SDL_Joystick *joystick, Uint8 button, Uint8 state){
880
struct joystick_logical_mapping* buttons;
881
882
883
884
885
886
887
888
889
SDL_Joystick *logicaljoy = NULL;
/* if there's no map then this is just a regular joystick
*/
if (SDL_joylist[joystick->index].map == NULL)
return 0;
/* get the logical joystick that will receive the event
*/
890
buttons = SDL_joylist[joystick->index].map->buttonmap+button;
891
892
893
894
895
896
897
898
899
900
901
902
903
logicaljoy = FindLogicalJoystick(joystick, buttons);
if (logicaljoy == NULL)
return 1;
SDL_PrivateJoystickButton(logicaljoy, buttons->nthing, state);
return 1;
}
static int LogicalJoystickAxis(
SDL_Joystick *joystick, Uint8 axis, Sint16 value)
{
904
struct joystick_logical_mapping* axes;
905
906
907
908
909
910
911
912
913
SDL_Joystick *logicaljoy = NULL;
/* if there's no map then this is just a regular joystick
*/
if (SDL_joylist[joystick->index].map == NULL)
return 0;
/* get the logical joystick that will receive the event
*/
914
axes = SDL_joylist[joystick->index].map->axismap+axis;
915
916
917
918
919
920
921
922
923
924
925
logicaljoy = FindLogicalJoystick(joystick, axes);
if (logicaljoy == NULL)
return 1;
SDL_PrivateJoystickAxis(logicaljoy, axes->nthing, value);
return 1;
}
#endif /* USE_LOGICAL_JOYSTICKS */
926
927
928
929
930
931
932
933
934
static __inline__
void HandleHat(SDL_Joystick *stick, Uint8 hat, int axis, int value)
{
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 }
};
935
SDL_logical_joydecl(SDL_Joystick *logicaljoy = NULL);
936
SDL_logical_joydecl(struct joystick_logical_mapping* hats = NULL);
937
938
939
940
941
if (stick->nhats <= hat) {
return; /* whoops, that shouldn't happen! */
}
942
943
944
945
946
947
948
949
950
951
952
953
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;
954
955
956
957
958
959
960
961
#ifndef NO_LOGICAL_JOYSTICKS
/* 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
*/
962
hats = SDL_joylist[stick->index].map->hatmap+hat;
963
964
965
966
967
968
969
970
971
logicaljoy = FindLogicalJoystick(stick, hats);
}
if (logicaljoy) {
stick = logicaljoy;
hat = hats->nthing;
}
#endif /* USE_LOGICAL_JOYSTICKS */
972
973
974
975
976
977
978
979
SDL_PrivateJoystickHat(stick, hat,
position_map[the_hat->axis[1]][the_hat->axis[0]]);
}
}
static __inline__
void HandleBall(SDL_Joystick *stick, Uint8 ball, int axis, int value)
{
980
981
982
if ((stick->nballs <= ball) || (axis >= 2)) {
return; /* whoops, that shouldn't happen! */
}
983
984
985
986
987
988
989
990
991
992
993
994
995
996
stick->hwdata->balls[ball].axis[axis] += value;
}
/* 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.
*/
static __inline__ void JS_HandleEvents(SDL_Joystick *joystick)
{
struct js_event events[32];
int i, len;
Uint8 other_axis;
997
998
999
#ifndef NO_LOGICAL_JOYSTICKS
if (SDL_joylist[joystick->index].fname == NULL) {
SDL_joylist_head(i, joystick->index);
1000
JS_HandleEvents(SDL_joylist[i].joy);