This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_sysjoystick.c
602 lines (538 loc) · 15 KB
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2009 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
42
#ifndef __FreeBSD_kernel_version
#define __FreeBSD_kernel_version __FreeBSD_version
#endif
43
44
45
#if defined(HAVE_USB_H)
#include <usb.h>
#endif
46
47
48
49
#ifdef __DragonFly__
#include <bus/usb/usb.h>
#include <bus/usb/usbhid.h>
#else
50
51
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
52
#endif
53
54
55
56
57
58
59
#if defined(HAVE_USBHID_H)
#include <usbhid.h>
#elif defined(HAVE_LIBUSB_H)
#include <libusb.h>
#elif defined(HAVE_LIBUSBHID_H)
#include <libusbhid.h>
60
#endif
61
62
#ifdef __FREEBSD__
63
#ifndef __DragonFly__
64
#include <osreldate.h>
65
#endif
66
67
68
#include <sys/joystick.h>
#endif
69
#if SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
70
#include <machine/joystick.h>
71
72
#endif
73
#include "SDL_joystick.h"
74
75
#include "../SDL_sysjoystick.h"
#include "../SDL_joystick_c.h"
76
77
78
79
80
#define MAX_UHID_JOYS 4
#define MAX_JOY_JOYS 2
#define MAX_JOYS (MAX_UHID_JOYS + MAX_JOY_JOYS)
81
82
83
84
85
86
87
88
89
90
91
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;
92
93
};
94
95
96
97
98
static struct
{
int uhid_report;
hid_kind_t kind;
const char *name;
99
} const repinfo[] = {
100
101
102
{UHID_INPUT_REPORT, hid_input, "input"},
{UHID_OUTPUT_REPORT, hid_output, "output"},
{UHID_FEATURE_REPORT, hid_feature, "feature"}
103
};
104
105
106
107
108
109
enum
{
REPORT_INPUT = 0,
REPORT_OUTPUT = 1,
REPORT_FEATURE = 2
110
111
};
112
113
114
115
116
117
118
119
120
121
122
enum
{
JOYAXE_X,
JOYAXE_Y,
JOYAXE_Z,
JOYAXE_SLIDER,
JOYAXE_WHEEL,
JOYAXE_RX,
JOYAXE_RY,
JOYAXE_RZ,
JOYAXE_count
123
};
124
125
126
127
128
129
130
131
132
133
134
135
136
struct joystick_hwdata
{
int fd;
char *path;
enum
{
BSDJOY_UHID, /* uhid(4) */
BSDJOY_JOY /* joy(4) */
} type;
struct report_desc *repdesc;
struct report inreport;
int axis_map[JOYAXE_count]; /* map present JOYAXE_* to 0,1,.. */
137
138
139
140
141
};
static char *joynames[MAX_JOYS];
static char *joydevnames[MAX_JOYS];
142
143
static int report_alloc(struct report *, struct report_desc *, int);
static void report_free(struct report *);
144
145
146
147
148
149
150
#ifdef USBHID_UCR_DATA
#define REP_BUF_DATA(rep) ((rep)->buf->ucr_data)
#else
#define REP_BUF_DATA(rep) ((rep)->buf->data)
#endif
151
152
153
int
SDL_SYS_JoystickInit(void)
{
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
char s[16];
int i, fd;
SDL_numjoysticks = 0;
SDL_memset(joynames, 0, sizeof(joynames));
SDL_memset(joydevnames, 0, sizeof(joydevnames));
for (i = 0; i < MAX_UHID_JOYS; i++) {
SDL_Joystick nj;
SDL_snprintf(s, SDL_arraysize(s), "/dev/uhid%d", i);
nj.index = SDL_numjoysticks;
joynames[nj.index] = strdup(s);
if (SDL_SYS_JoystickOpen(&nj) == 0) {
SDL_SYS_JoystickClose(&nj);
SDL_numjoysticks++;
} else {
SDL_free(joynames[nj.index]);
joynames[nj.index] = NULL;
}
}
for (i = 0; i < MAX_JOY_JOYS; i++) {
SDL_snprintf(s, SDL_arraysize(s), "/dev/joy%d", i);
fd = open(s, O_RDONLY);
if (fd != -1) {
joynames[SDL_numjoysticks++] = strdup(s);
close(fd);
}
}
/* Read the default USB HID usage table. */
hid_init(NULL);
return (SDL_numjoysticks);
191
192
193
194
195
}
const char *
SDL_SYS_JoystickName(int index)
{
196
197
198
199
if (joydevnames[index] != NULL) {
return (joydevnames[index]);
}
return (joynames[index]);
200
201
}
202
203
204
205
206
207
static int
usage_to_joyaxe(unsigned usage)
{
int joyaxe;
switch (usage) {
case HUG_X:
208
209
joyaxe = JOYAXE_X;
break;
210
case HUG_Y:
211
212
joyaxe = JOYAXE_Y;
break;
213
case HUG_Z:
214
215
joyaxe = JOYAXE_Z;
break;
216
case HUG_SLIDER:
217
218
joyaxe = JOYAXE_SLIDER;
break;
219
case HUG_WHEEL:
220
221
joyaxe = JOYAXE_WHEEL;
break;
222
case HUG_RX:
223
224
joyaxe = JOYAXE_RX;
break;
225
case HUG_RY:
226
227
joyaxe = JOYAXE_RY;
break;
228
case HUG_RZ:
229
230
joyaxe = JOYAXE_RZ;
break;
231
default:
232
joyaxe = -1;
233
}
234
return joyaxe;
235
236
237
238
239
240
}
static unsigned
hatval_to_sdl(Sint32 hatval)
{
static const unsigned hat_dir_map[8] = {
241
242
SDL_HAT_UP, SDL_HAT_RIGHTUP, SDL_HAT_RIGHT, SDL_HAT_RIGHTDOWN,
SDL_HAT_DOWN, SDL_HAT_LEFTDOWN, SDL_HAT_LEFT, SDL_HAT_LEFTUP
243
244
};
unsigned result;
245
246
247
248
if ((hatval & 7) == hatval)
result = hat_dir_map[hatval];
else
result = SDL_HAT_CENTERED;
249
250
251
252
return result;
}
253
int
254
SDL_SYS_JoystickOpen(SDL_Joystick * joy)
255
{
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
char *path = joynames[joy->index];
struct joystick_hwdata *hw;
struct hid_item hitem;
struct hid_data *hdata;
struct report *rep;
int fd;
int i;
fd = open(path, O_RDONLY);
if (fd == -1) {
SDL_SetError("%s: %s", path, strerror(errno));
return (-1);
}
hw = (struct joystick_hwdata *)
SDL_malloc(sizeof(struct joystick_hwdata));
if (hw == NULL) {
SDL_OutOfMemory();
close(fd);
return (-1);
}
joy->hwdata = hw;
hw->fd = fd;
hw->path = strdup(path);
if (!SDL_strncmp(path, "/dev/joy", 8)) {
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;
}
{
int ax;
for (ax = 0; ax < JOYAXE_count; ax++)
hw->axis_map[ax] = -1;
}
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;
}
303
304
305
306
307
308
309
310
311
312
313
314
315
rep = &hw->inreport;
if (ioctl(fd, USB_GET_REPORT_ID, &rep->rid) < 0) {
rep->rid = -1; /* XXX */
}
if (report_alloc(rep, hw->repdesc, REPORT_INPUT) < 0) {
goto usberr;
}
if (rep->size <= 0) {
SDL_SetError("%s: Input report descriptor has invalid length",
hw->path);
goto usberr;
}
316
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111)
317
hdata = hid_start_parse(hw->repdesc, 1 << hid_input, rep->rid);
318
#else
319
hdata = hid_start_parse(hw->repdesc, 1 << hid_input);
320
#endif
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
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
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;
for (i = 0; i < JOYAXE_count; i++)
hw->axis_map[i] = -1;
while (hid_get_item(hdata, &hitem) > 0) {
char *sp;
const char *s;
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);
sp = SDL_malloc(SDL_strlen(s) + 5);
SDL_snprintf(sp, SDL_strlen(s) + 5, "%s (%d)",
s, joy->index);
joydevnames[joy->index] = sp;
}
}
break;
case hid_input:
switch (HID_PAGE(hitem.usage)) {
case HUP_GENERIC_DESKTOP:
{
unsigned usage = HID_USAGE(hitem.usage);
int joyaxe = usage_to_joyaxe(usage);
if (joyaxe >= 0) {
hw->axis_map[joyaxe] = 1;
} else if (usage == HUG_HAT_SWITCH) {
joy->nhats++;
}
break;
}
case HUP_BUTTON:
joy->nbuttons++;
break;
default:
break;
}
break;
default:
break;
}
}
hid_end_parse(hdata);
for (i = 0; i < JOYAXE_count; i++)
if (hw->axis_map[i] > 0)
hw->axis_map[i] = joy->naxes++;
usbend:
/* The poll blocks the event thread. */
fcntl(fd, F_SETFL, O_NONBLOCK);
return (0);
usberr:
close(hw->fd);
SDL_free(hw->path);
SDL_free(hw);
return (-1);
390
391
392
}
void
393
SDL_SYS_JoystickUpdate(SDL_Joystick * joy)
394
{
395
396
397
398
399
struct hid_item hitem;
struct hid_data *hdata;
struct report *rep;
int nbutton, naxe = -1;
Sint32 v;
400
401
#if defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
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
struct joystick gameport;
static int x, y, xmin = 0xffff, ymin = 0xffff, xmax = 0, ymax = 0;
if (joy->hwdata->type == BSDJOY_JOY) {
if (read(joy->hwdata->fd, &gameport, sizeof gameport) !=
sizeof gameport)
return;
if (abs(x - gameport.x) > 8) {
x = gameport.x;
if (x < xmin) {
xmin = x;
}
if (x > xmax) {
xmax = x;
}
if (xmin == xmax) {
xmin--;
xmax++;
}
v = (Sint32) x;
v -= (xmax + xmin + 1) / 2;
v *= 32768 / ((xmax - xmin + 1) / 2);
SDL_PrivateJoystickAxis(joy, 0, v);
}
if (abs(y - gameport.y) > 8) {
y = gameport.y;
if (y < ymin) {
ymin = y;
}
if (y > ymax) {
ymax = y;
}
if (ymin == ymax) {
ymin--;
ymax++;
}
v = (Sint32) y;
v -= (ymax + ymin + 1) / 2;
v *= 32768 / ((ymax - ymin + 1) / 2);
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;
}
451
#endif /* defined(__FREEBSD__) || SDL_JOYSTICK_USBHID_MACHINE_JOYSTICK_H */
452
453
454
455
456
457
rep = &joy->hwdata->inreport;
if (read(joy->hwdata->fd, REP_BUF_DATA(rep), rep->size) != rep->size) {
return;
}
458
#if defined(USBHID_NEW) || (defined(__FREEBSD__) && __FreeBSD_kernel_version >= 500111)
459
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input, rep->rid);
460
#else
461
hdata = hid_start_parse(joy->hwdata->repdesc, 1 << hid_input);
462
#endif
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
if (hdata == NULL) {
fprintf(stderr, "%s: Cannot start HID parser\n", joy->hwdata->path);
return;
}
for (nbutton = 0; hid_get_item(hdata, &hitem) > 0;) {
switch (hitem.kind) {
case hid_input:
switch (HID_PAGE(hitem.usage)) {
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 */
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
v -= (hitem.logical_maximum +
hitem.logical_minimum + 1) / 2;
v *= 32768 /
((hitem.logical_maximum -
hitem.logical_minimum + 1) / 2);
if (v != joy->axes[naxe]) {
SDL_PrivateJoystickAxis(joy, naxe, v);
}
} else if (usage == HUG_HAT_SWITCH) {
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
SDL_PrivateJoystickHat(joy, 0,
hatval_to_sdl(v) -
hitem.logical_minimum);
}
break;
}
case HUP_BUTTON:
v = (Sint32) hid_get_data(REP_BUF_DATA(rep), &hitem);
if (joy->buttons[nbutton] != v) {
SDL_PrivateJoystickButton(joy, nbutton, v);
}
nbutton++;
break;
default:
continue;
}
break;
default:
break;
}
}
hid_end_parse(hdata);
return;
514
515
516
517
}
/* Function to close a joystick after use */
void
518
SDL_SYS_JoystickClose(SDL_Joystick * joy)
519
{
520
521
522
523
524
525
526
527
528
if (SDL_strncmp(joy->hwdata->path, "/dev/joy", 8)) {
report_free(&joy->hwdata->inreport);
hid_dispose_report_desc(joy->hwdata->repdesc);
}
close(joy->hwdata->fd);
SDL_free(joy->hwdata->path);
SDL_free(joy->hwdata);
return;
529
530
531
532
533
}
void
SDL_SYS_JoystickQuit(void)
{
534
int i;
535
536
537
538
539
540
541
for (i = 0; i < MAX_JOYS; i++) {
if (joynames[i] != NULL)
SDL_free(joynames[i]);
if (joydevnames[i] != NULL)
SDL_free(joydevnames[i]);
}
542
543
return;
544
545
546
547
548
}
static int
report_alloc(struct report *r, struct report_desc *rd, int repind)
{
549
int len;
550
551
#ifdef __DragonFly__
552
len = hid_report_size(rd, r->rid, repinfo[repind].kind);
553
#elif __FREEBSD__
554
555
# if (__FreeBSD_kernel_version >= 460000) || defined(__FreeBSD_kernel__)
# if (__FreeBSD_kernel_version <= 500111)
556
len = hid_report_size(rd, r->rid, repinfo[repind].kind);
557
# else
558
len = hid_report_size(rd, repinfo[repind].kind, r->rid);
559
# endif
560
# else
561
len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
562
# endif
563
#else
564
# ifdef USBHID_NEW
565
len = hid_report_size(rd, repinfo[repind].kind, r->rid);
566
# else
567
len = hid_report_size(rd, repinfo[repind].kind, &r->rid);
568
# endif
569
#endif
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
if (len < 0) {
SDL_SetError("Negative HID report size");
return (-1);
}
r->size = len;
if (r->size > 0) {
r->buf = SDL_malloc(sizeof(*r->buf) - sizeof(REP_BUF_DATA(r)) +
r->size);
if (r->buf == NULL) {
SDL_OutOfMemory();
return (-1);
}
} else {
r->buf = NULL;
}
r->status = SREPORT_CLEAN;
return (0);
590
591
592
593
594
}
static void
report_free(struct report *r)
{
595
596
597
598
if (r->buf != NULL) {
SDL_free(r->buf);
}
r->status = SREPORT_UNINIT;
599
600
}
601
#endif /* SDL_JOYSTICK_USBHID */
602
/* vi: set ts=4 sw=4 expandtab: */