/
SDL_sysjoystick.c
591 lines (527 loc) · 12.8 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_USBHID
26
27
28
29
30
31
32
/*
* Joystick driver for the uhid(4) interface found in OpenBSD,
* NetBSD and FreeBSD.
*
* Maintainer: <vedge at csoft.org>
*/
33
34
#include <sys/param.h>
35
36
37
38
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
39
40
41
#if defined(HAVE_USB_H)
#include <usb.h>
#endif
42
43
44
45
#ifdef __DragonFly__
#include <bus/usb/usb.h>
#include <bus/usb/usbhid.h>
#else
46
47
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
49
50
51
52
53
54
55
#if defined(HAVE_USBHID_H)
#include <usbhid.h>
#elif defined(HAVE_LIBUSB_H)
#include <libusb.h>
#elif defined(HAVE_LIBUSBHID_H)
#include <libusbhid.h>
56
#endif
57
58
#ifdef __FREEBSD__
59
#ifndef __DragonFly__
60
#include <osreldate.h>
62
63
64
#include <sys/joystick.h>
#endif
65
#if SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
66
#include <machine/joystick.h>
67
68
#endif
69
#include "SDL_joystick.h"
70
71
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
#define MAX_UHID_JOYS 4
#define MAX_JOY_JOYS 2
#define MAX_JOYS (MAX_UHID_JOYS + MAX_JOY_JOYS)
struct report {
struct usb_ctl_report *buf; /* Buffer */
size_t size; /* Buffer size */
int rid; /* Report ID */
enum {
SREPORT_UNINIT,
SREPORT_CLEAN,
SREPORT_DIRTY
} status;
};
static struct {
int uhid_report;
90
hid_kind_t kind;
91
92
93
94
95
96
const char *name;
} const repinfo[] = {
{ UHID_INPUT_REPORT, hid_input, "input" },
{ UHID_OUTPUT_REPORT, hid_output, "output" },
{ UHID_FEATURE_REPORT, hid_feature, "feature" }
};
97
98
99
100
101
102
103
104
105
106
107
108
enum {
REPORT_INPUT = 0,
REPORT_OUTPUT = 1,
REPORT_FEATURE = 2
};
enum {
JOYAXE_X,
JOYAXE_Y,
JOYAXE_Z,
JOYAXE_SLIDER,
109
110
111
112
113
JOYAXE_WHEEL,
JOYAXE_RX,
JOYAXE_RY,
JOYAXE_RZ,
JOYAXE_count
114
};
115
116
117
118
119
120
121
122
123
124
struct joystick_hwdata {
int fd;
char *path;
enum {
BSDJOY_UHID, /* uhid(4) */
BSDJOY_JOY /* joy(4) */
} type;
struct report_desc *repdesc;
struct report inreport;
125
int axis_map[JOYAXE_count]; /* map present JOYAXE_* to 0,1,..*/
126
127
128
129
130
131
int x;
int y;
int xmin;
int ymin;
int xmax;
int ymax;
132
133
134
135
136
137
138
139
};
static char *joynames[MAX_JOYS];
static char *joydevnames[MAX_JOYS];
static int report_alloc(struct report *, struct report_desc *, int);
static void report_free(struct report *);
140
141
142
143
144
145
#ifdef USBHID_UCR_DATA
#define REP_BUF_DATA(rep) ((rep)->buf->ucr_data)
#else
#define REP_BUF_DATA(rep) ((rep)->buf->data)
#endif
146
147
148
int
SDL_SYS_JoystickInit(void)
{
149
char s[16];
150
151
152
153
int i, fd;
SDL_numjoysticks = 0;
154
155
SDL_memset(joynames, 0, sizeof(joynames));
SDL_memset(joydevnames, 0, sizeof(joydevnames));
156
157
for (i = 0; i < MAX_UHID_JOYS; i++) {
158
159
SDL_Joystick nj;
160
SDL_snprintf(s, SDL_arraysize(s), "/dev/uhid%d", i);
161
162
163
164
165
166
167
168
nj.index = SDL_numjoysticks;
joynames[nj.index] = strdup(s);
if (SDL_SYS_JoystickOpen(&nj) == 0) {
SDL_SYS_JoystickClose(&nj);
SDL_numjoysticks++;
} else {
169
SDL_free(joynames[nj.index]);
170
joynames[nj.index] = NULL;
171
172
173
}
}
for (i = 0; i < MAX_JOY_JOYS; i++) {
174
SDL_snprintf(s, SDL_arraysize(s), "/dev/joy%d", i);
175
176
fd = open(s, O_RDONLY);
if (fd != -1) {
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
joynames[SDL_numjoysticks++] = strdup(s);
close(fd);
}
}
/* Read the default USB HID usage table. */
hid_init(NULL);
return (SDL_numjoysticks);
}
const char *
SDL_SYS_JoystickName(int index)
{
if (joydevnames[index] != NULL) {
return (joydevnames[index]);
}
return (joynames[index]);
}
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
static int
usage_to_joyaxe(unsigned usage)
{
int joyaxe;
switch (usage) {
case HUG_X:
joyaxe = JOYAXE_X; break;
case HUG_Y:
joyaxe = JOYAXE_Y; break;
case HUG_Z:
joyaxe = JOYAXE_Z; break;
case HUG_SLIDER:
joyaxe = JOYAXE_SLIDER; break;
case HUG_WHEEL:
joyaxe = JOYAXE_WHEEL; break;
case HUG_RX:
joyaxe = JOYAXE_RX; break;
case HUG_RY:
joyaxe = JOYAXE_RY; break;
case HUG_RZ:
joyaxe = JOYAXE_RZ; break;
default:
joyaxe = -1;
}
return joyaxe;
}
static unsigned
hatval_to_sdl(Sint32 hatval)
{
static const unsigned hat_dir_map[8] = {
SDL_HAT_UP, SDL_HAT_RIGHTUP, SDL_HAT_RIGHT, SDL_HAT_RIGHTDOWN,
SDL_HAT_DOWN, SDL_HAT_LEFTDOWN, SDL_HAT_LEFT, SDL_HAT_LEFTUP
};
unsigned result;
if ((hatval & 7) == hatval)
result = hat_dir_map[hatval];
else
result = SDL_HAT_CENTERED;
return result;
}
240
241
242
243
244
245
246
247
248
int
SDL_SYS_JoystickOpen(SDL_Joystick *joy)
{
char *path = joynames[joy->index];
struct joystick_hwdata *hw;
struct hid_item hitem;
struct hid_data *hdata;
struct report *rep;
int fd;
250
251
fd = open(path, O_RDONLY);
252
if (fd == -1) {
253
254
255
256
SDL_SetError("%s: %s", path, strerror(errno));
return (-1);
}
257
hw = (struct joystick_hwdata *)SDL_malloc(sizeof(struct joystick_hwdata));
258
259
260
261
262
263
264
265
if (hw == NULL) {
SDL_OutOfMemory();
close(fd);
return (-1);
}
joy->hwdata = hw;
hw->fd = fd;
hw->path = strdup(path);
266
267
268
269
270
271
hw->x = 0;
hw->y = 0;
hw->xmin = 0xffff;
hw->ymin = 0xffff;
hw->xmax = 0;
hw->ymax = 0;
272
if (! SDL_strncmp(path, "/dev/joy", 8)) {
273
274
275
276
277
278
279
280
281
282
283
hw->type = BSDJOY_JOY;
joy->naxes = 2;
joy->nbuttons = 2;
joy->nhats = 0;
joy->nballs = 0;
joydevnames[joy->index] = strdup("Gameport joystick");
goto usbend;
} else {
hw->type = BSDJOY_UHID;
}
284
285
286
287
288
{
int ax;
for (ax = 0; ax < JOYAXE_count; ax++)
hw->axis_map[ax] = -1;
}
289
290
291
292
293
294
295
296
hw->repdesc = hid_get_report_desc(fd);
if (hw->repdesc == NULL) {
SDL_SetError("%s: USB_GET_REPORT_DESC: %s", hw->path,
strerror(errno));
goto usberr;
}
rep = &hw->inreport;
297
298
299
if (ioctl(fd, USB_GET_REPORT_ID, &rep->rid) < 0) {
rep->rid = -1; /* XXX */
}
300
301
302
303
if (report_alloc(rep, hw->repdesc, REPORT_INPUT) < 0) {
goto usberr;
}
if (rep->size <= 0) {
304
305
SDL_SetError("%s: Input report descriptor has invalid length",
hw->path);
306
307
308
goto usberr;
}
309
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_version >= 500111)
310
311
hdata = hid_start_parse(hw->repdesc, 1 << hid_input, rep->rid);
#else
312
hdata = hid_start_parse(hw->repdesc, 1 << hid_input);
313
#endif
314
315
316
317
318
319
320
321
if (hdata == NULL) {
SDL_SetError("%s: Cannot start HID parser", hw->path);
goto usberr;
}
joy->naxes = 0;
joy->nbuttons = 0;
joy->nhats = 0;
joy->nballs = 0;
322
323
for (i=0; i<JOYAXE_count; i++)
hw->axis_map[i] = -1;
324
325
while (hid_get_item(hdata, &hitem) > 0) {
326
327
char *sp;
const char *s;
328
329
330
331
332
333
334
335
336
switch (hitem.kind) {
case hid_collection:
switch (HID_PAGE(hitem.usage)) {
case HUP_GENERIC_DESKTOP:
switch (HID_USAGE(hitem.usage)) {
case HUG_JOYSTICK:
case HUG_GAME_PAD:
s = hid_usage_in_page(hitem.usage);
337
sp = SDL_malloc(SDL_strlen(s) + 5);
338
SDL_snprintf(sp, SDL_strlen(s) + 5, "%s (%d)", s,
339
340
341
342
343
344
345
joy->index);
joydevnames[joy->index] = sp;
}
}
break;
case hid_input:
switch (HID_PAGE(hitem.usage)) {
346
347
348
349
case HUP_GENERIC_DESKTOP: {
unsigned usage = HID_USAGE(hitem.usage);
int joyaxe = usage_to_joyaxe(usage);
if (joyaxe >= 0) {
350
hw->axis_map[joyaxe] = 1;
351
352
353
354
355
} else if (usage == HUG_HAT_SWITCH) {
joy->nhats++;
}
break;
}
356
357
358
case HUP_BUTTON:
joy->nbuttons++;
break;
359
360
default:
break;
361
362
363
364
365
366
367
}
break;
default:
break;
}
}
hid_end_parse(hdata);
368
369
370
for (i=0; i<JOYAXE_count; i++)
if (hw->axis_map[i] > 0)
hw->axis_map[i] = joy->naxes++;
371
372
usbend:
373
374
375
376
377
378
/* The poll blocks the event thread. */
fcntl(fd, F_SETFL, O_NONBLOCK);
return (0);
usberr:
close(hw->fd);
379
380
SDL_free(hw->path);
SDL_free(hw);
381
382
383
384
385
386
return (-1);
}
void
SDL_SYS_JoystickUpdate(SDL_Joystick *joy)
{
387
388
389
struct hid_item hitem;
struct hid_data *hdata;
struct report *rep;
390
int nbutton, naxe = -1;
391
Sint32 v;
392
393
#if defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
394
395
396
397
398
struct joystick gameport;
if (joy->hwdata->type == BSDJOY_JOY) {
if (read(joy->hwdata->fd, &gameport, sizeof gameport) != sizeof gameport)
return;
399
400
401
402
if (abs(joy->hwdata->x - gameport.x) > 8) {
joy->hwdata->x = gameport.x;
if (joy->hwdata->x < joy->hwdata->xmin) {
joy->hwdata->xmin = joy->hwdata->x;
403
}
404
405
if (joy->hwdata->x > joy->hwdata->xmax) {
joy->hwdata->xmax = joy->hwdata->x;
406
}
407
408
409
if (joy->hwdata->xmin == joy->hwdata->xmax) {
joy->hwdata->xmin--;
joy->hwdata->xmax++;
410
}
411
412
413
v = (Sint32)joy->hwdata->x;
v -= (joy->hwdata->xmax + joy->hwdata->xmin + 1)/2;
v *= 32768/((joy->hwdata->xmax - joy->hwdata->xmin + 1)/2);
414
415
SDL_PrivateJoystickAxis(joy, 0, v);
}
416
417
418
419
if (abs(joy->hwdata->y - gameport.y) > 8) {
joy->hwdata->y = gameport.y;
if (joy->hwdata->y < joy->hwdata->ymin) {
joy->hwdata->ymin = joy->hwdata->y;
420
}
421
422
if (joy->hwdata->y > joy->hwdata->ymax) {
joy->hwdata->ymax = joy->hwdata->y;
423
}
424
425
426
if (joy->hwdata->ymin == joy->hwdata->ymax) {
joy->hwdata->ymin--;
joy->hwdata->ymax++;
427
}
428
429
430
v = (Sint32)joy->hwdata->y;
v -= (joy->hwdata->ymax + joy->hwdata->ymin + 1)/2;
v *= 32768/((joy->hwdata->ymax - joy->hwdata->ymin + 1)/2);
431
432
433
434
435
436
437
438
439
440
SDL_PrivateJoystickAxis(joy, 1, v);
}
if (gameport.b1 != joy->buttons[0]) {
SDL_PrivateJoystickButton(joy, 0, gameport.b1);
}
if (gameport.b2 != joy->buttons[1]) {
SDL_PrivateJoystickButton(joy, 1, gameport.b2);
}
return;
}
441
#endif /* defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H */
442
443
rep = &joy->hwdata->inreport;
444
445
if (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) != rep->size) {
446
447
return;
}
448
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_version >= 500111)
449
450
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid);
#else
451
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
452
#endif
453
454
455
456
457
458
if (hdata == NULL) {
fprintf(stderr, "%s: Cannot start HID parser\n",
joy->hwdata->path);
return;
}
459
for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) {
460
461
462
switch (hitem.kind) {
case hid_input:
switch (HID_PAGE(hitem.usage)) {
463
464
465
466
467
468
case HUP_GENERIC_DESKTOP: {
unsigned usage = HID_USAGE(hitem.usage);
int joyaxe = usage_to_joyaxe(usage);
if (joyaxe >= 0) {
naxe = joy->hwdata->axis_map[joyaxe];
/* scaleaxe */
469
v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
470
&hitem);
471
472
v -= (hitem.logical_maximum + hitem.logical_minimum + 1)/2;
v *= 32768/((hitem.logical_maximum - hitem.logical_minimum + 1)/2);
473
if (v != joy->axes[naxe]) {
474
SDL_PrivateJoystickAxis(joy, naxe, v);
475
}
476
477
478
} else if (usage == HUG_HAT_SWITCH) {
v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
&hitem);
479
480
SDL_PrivateJoystickHat(joy, 0,
hatval_to_sdl(v)-hitem.logical_minimum);
481
482
483
}
break;
}
484
case HUP_BUTTON:
485
v = (Sint32)hid_get_data(REP_BUF_DATA(rep),
486
&hitem);
487
488
489
490
491
492
if (joy->buttons[nbutton] != v) {
SDL_PrivateJoystickButton(joy,
nbutton, v);
}
nbutton++;
break;
493
494
default:
continue;
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
}
break;
default:
break;
}
}
hid_end_parse(hdata);
return;
}
/* Function to close a joystick after use */
void
SDL_SYS_JoystickClose(SDL_Joystick *joy)
{
510
if (SDL_strncmp(joy->hwdata->path, "/dev/joy", 8)) {
511
512
513
report_free(&joy->hwdata->inreport);
hid_dispose_report_desc(joy->hwdata->repdesc);
}
514
close(joy->hwdata->fd);
515
516
SDL_free(joy->hwdata->path);
SDL_free(joy->hwdata);
517
518
519
520
521
522
523
524
525
526
527
return;
}
void
SDL_SYS_JoystickQuit(void)
{
int i;
for (i = 0; i < MAX_JOYS; i++) {
if (joynames[i] != NULL)
528
SDL_free(joynames[i]);
529
if (joydevnames[i] != NULL)
530
SDL_free(joydevnames[i]);
531
532
533
534
535
536
537
538
539
540
}
return;
}
static int
report_alloc(struct report *r, struct report_desc *rd, int repind)
{
int len;
541
542
543
#ifdef __DragonFly__
len = hid_report_size(rd, r->rid, repinfo[repind].kind);
#elif __FREEBSD__
544
# if (__FreeBSD_version >= 460000)
545
# if (__FreeBSD_version <= 500111)
546
len = hid_report_size(rd, r->rid, repinfo[repind].kind);
547
548
549
# else
len = hid_report_size(rd, repinfo[repind].kind, r->rid);
# endif
550
551
# else
len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
553
#else
554
555
# ifdef USBHID_NEW
len = hid_report_size(rd, repinfo[repind].kind, r->rid);
556
557
# else
len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
558
# endif
559
#endif
560
561
562
563
564
565
566
567
if (len < 0) {
SDL_SetError("Negative HID report size");
return (-1);
}
r->size = len;
if (r->size > 0) {
568
r->buf = SDL_malloc(sizeof(*r->buf) - sizeof(REP_BUF_DATA(r)) +
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
r->size);
if (r->buf == NULL) {
SDL_OutOfMemory();
return (-1);
}
} else {
r->buf = NULL;
}
r->status = SREPORT_CLEAN;
return (0);
}
static void
report_free(struct report *r)
{
if (r->buf != NULL) {
586
SDL_free(r->buf);
587
588
589
590
}
r->status = SREPORT_UNINIT;
}
591
#endif /* SDL_JOYSTICK_USBHID */