forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
hid-lg4ff.c
1493 lines (1284 loc) · 41.2 KB
/
hid-lg4ff.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
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
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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
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
303
304
305
306
307
308
309
310
311
312
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
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
390
391
392
393
394
395
396
397
398
399
400
401
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
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
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
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
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
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
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
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
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
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
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Force feedback support for Logitech Gaming Wheels
*
* Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
* Speed Force Wireless (WiiWheel)
*
* Copyright (c) 2010 Simon Wood <[email protected]>
*/
/*
*/
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include "usbhid/usbhid.h"
#include "hid-lg.h"
#include "hid-lg4ff.h"
#include "hid-ids.h"
#define LG4FF_MMODE_IS_MULTIMODE 0
#define LG4FF_MMODE_SWITCHED 1
#define LG4FF_MMODE_NOT_MULTIMODE 2
#define LG4FF_MODE_NATIVE_IDX 0
#define LG4FF_MODE_DFEX_IDX 1
#define LG4FF_MODE_DFP_IDX 2
#define LG4FF_MODE_G25_IDX 3
#define LG4FF_MODE_DFGT_IDX 4
#define LG4FF_MODE_G27_IDX 5
#define LG4FF_MODE_G29_IDX 6
#define LG4FF_MODE_MAX_IDX 7
#define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
#define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
#define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
#define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
#define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
#define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
#define LG4FF_MODE_G29 BIT(LG4FF_MODE_G29_IDX)
#define LG4FF_DFEX_TAG "DF-EX"
#define LG4FF_DFEX_NAME "Driving Force / Formula EX"
#define LG4FF_DFP_TAG "DFP"
#define LG4FF_DFP_NAME "Driving Force Pro"
#define LG4FF_G25_TAG "G25"
#define LG4FF_G25_NAME "G25 Racing Wheel"
#define LG4FF_G27_TAG "G27"
#define LG4FF_G27_NAME "G27 Racing Wheel"
#define LG4FF_G29_TAG "G29"
#define LG4FF_G29_NAME "G29 Racing Wheel"
#define LG4FF_DFGT_TAG "DFGT"
#define LG4FF_DFGT_NAME "Driving Force GT"
#define LG4FF_FFEX_REV_MAJ 0x21
#define LG4FF_FFEX_REV_MIN 0x00
static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
struct lg4ff_wheel_data {
const u32 product_id;
u16 combine;
u16 range;
const u16 min_range;
const u16 max_range;
#ifdef CONFIG_LEDS_CLASS
u8 led_state;
struct led_classdev *led[5];
#endif
const u32 alternate_modes;
const char * const real_tag;
const char * const real_name;
const u16 real_product_id;
void (*set_range)(struct hid_device *hid, u16 range);
};
struct lg4ff_device_entry {
spinlock_t report_lock; /* Protect output HID report */
struct hid_report *report;
struct lg4ff_wheel_data wdata;
};
static const signed short lg4ff_wheel_effects[] = {
FF_CONSTANT,
FF_AUTOCENTER,
-1
};
static const signed short no_wheel_effects[] = {
-1
};
struct lg4ff_wheel {
const u32 product_id;
const signed short *ff_effects;
const u16 min_range;
const u16 max_range;
void (*set_range)(struct hid_device *hid, u16 range);
};
struct lg4ff_compat_mode_switch {
const u8 cmd_count; /* Number of commands to send */
const u8 cmd[];
};
struct lg4ff_wheel_ident_info {
const u32 modes;
const u16 mask;
const u16 result;
const u16 real_product_id;
};
struct lg4ff_multimode_wheel {
const u16 product_id;
const u32 alternate_modes;
const char *real_tag;
const char *real_name;
};
struct lg4ff_alternate_mode {
const u16 product_id;
const char *tag;
const char *name;
};
static const struct lg4ff_wheel lg4ff_devices[] = {
{USB_DEVICE_ID_LOGITECH_WINGMAN_FG, no_wheel_effects, 40, 180, NULL},
{USB_DEVICE_ID_LOGITECH_WINGMAN_FFG, lg4ff_wheel_effects, 40, 180, NULL},
{USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
{USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
};
static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
{USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
LG4FF_DFP_TAG, LG4FF_DFP_NAME},
{USB_DEVICE_ID_LOGITECH_G25_WHEEL,
LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
LG4FF_G25_TAG, LG4FF_G25_NAME},
{USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
{USB_DEVICE_ID_LOGITECH_G27_WHEEL,
LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
LG4FF_G27_TAG, LG4FF_G27_NAME},
{USB_DEVICE_ID_LOGITECH_G29_WHEEL,
LG4FF_MODE_NATIVE | LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
LG4FF_G29_TAG, LG4FF_G29_NAME},
};
static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
[LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
[LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
[LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
[LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
[LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
[LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME},
[LG4FF_MODE_G29_IDX] = {USB_DEVICE_ID_LOGITECH_G29_WHEEL, LG4FF_G29_TAG, LG4FF_G29_NAME},
};
/* Multimode wheel identificators */
static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xf000,
0x1000,
USB_DEVICE_ID_LOGITECH_DFP_WHEEL
};
static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xff00,
0x1200,
USB_DEVICE_ID_LOGITECH_G25_WHEEL
};
static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xfff0,
0x1230,
USB_DEVICE_ID_LOGITECH_G27_WHEEL
};
static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xff00,
0x1300,
USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
};
static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info = {
LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xfff8,
0x1350,
USB_DEVICE_ID_LOGITECH_G29_WHEEL
};
static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info2 = {
LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
0xff00,
0x8900,
USB_DEVICE_ID_LOGITECH_G29_WHEEL
};
/* Multimode wheel identification checklists */
static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = {
&lg4ff_g29_ident_info,
&lg4ff_g29_ident_info2,
&lg4ff_dfgt_ident_info,
&lg4ff_g27_ident_info,
&lg4ff_g25_ident_info,
&lg4ff_dfp_ident_info
};
/* Compatibility mode switching commands */
/* EXT_CMD9 - Understood by G27 and DFGT */
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
};
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
};
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
};
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
};
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
};
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g29 = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
0xf8, 0x09, 0x05, 0x01, 0x01, 0x00, 0x00} /* Switch mode to G29 with detach */
};
/* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
1,
{0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
};
/* EXT_CMD16 - Understood by G25 and G27 */
static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
1,
{0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
};
/* Recalculates X axis value accordingly to currently selected range */
static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
{
u16 max_range;
s32 new_value;
if (range == 900)
return value;
else if (range == 200)
return value;
else if (range < 200)
max_range = 200;
else
max_range = 900;
new_value = 8192 + mult_frac(value - 8192, max_range, range);
if (new_value < 0)
return 0;
else if (new_value > 16383)
return 16383;
else
return new_value;
}
int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
{
struct lg4ff_device_entry *entry = drv_data->device_props;
s32 new_value = 0;
if (!entry) {
hid_err(hid, "Device properties not found");
return 0;
}
switch (entry->wdata.product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
switch (usage->code) {
case ABS_X:
new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
input_event(field->hidinput->input, usage->type, usage->code, new_value);
return 1;
default:
return 0;
}
default:
return 0;
}
}
int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
u8 *rd, int size, struct lg_drv_data *drv_data)
{
int offset;
struct lg4ff_device_entry *entry = drv_data->device_props;
if (!entry)
return 0;
/* adjust HID report present combined pedals data */
if (entry->wdata.combine) {
switch (entry->wdata.product_id) {
case USB_DEVICE_ID_LOGITECH_WHEEL:
rd[5] = rd[3];
rd[6] = 0x7F;
return 1;
case USB_DEVICE_ID_LOGITECH_WINGMAN_FG:
case USB_DEVICE_ID_LOGITECH_WINGMAN_FFG:
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
rd[4] = rd[3];
rd[5] = 0x7F;
return 1;
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
rd[5] = rd[4];
rd[6] = 0x7F;
return 1;
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
offset = 5;
break;
case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
offset = 6;
break;
case USB_DEVICE_ID_LOGITECH_WII_WHEEL:
offset = 3;
break;
default:
return 0;
}
/* Compute a combined axis when wheel does not supply it */
rd[offset] = (0xFF + rd[offset] - rd[offset+1]) >> 1;
rd[offset+1] = 0x7F;
return 1;
}
return 0;
}
static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
const struct lg4ff_multimode_wheel *mmode_wheel,
const u16 real_product_id)
{
u32 alternate_modes = 0;
const char *real_tag = NULL;
const char *real_name = NULL;
if (mmode_wheel) {
alternate_modes = mmode_wheel->alternate_modes;
real_tag = mmode_wheel->real_tag;
real_name = mmode_wheel->real_name;
}
{
struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
.real_product_id = real_product_id,
.combine = 0,
.min_range = wheel->min_range,
.max_range = wheel->max_range,
.set_range = wheel->set_range,
.alternate_modes = alternate_modes,
.real_tag = real_tag,
.real_name = real_name };
memcpy(wdata, &t_wdata, sizeof(t_wdata));
}
}
static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
s32 *value;
int x;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return -EINVAL;
}
value = entry->report->field[0]->value;
#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
switch (effect->type) {
case FF_CONSTANT:
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
CLAMP(x);
spin_lock_irqsave(&entry->report_lock, flags);
if (x == 0x80) {
/* De-activate force in slot-1*/
value[0] = 0x13;
value[1] = 0x00;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
return 0;
}
value[0] = 0x11; /* Slot 1 */
value[1] = 0x08;
value[2] = x;
value[3] = 0x80;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
break;
}
return 0;
}
/* Sends default autocentering command compatible with
* all wheels except Formula Force EX */
static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
{
struct hid_device *hid = input_get_drvdata(dev);
s32 *value;
u32 expand_a, expand_b;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return;
}
value = entry->report->field[0]->value;
/* De-activate Auto-Center */
spin_lock_irqsave(&entry->report_lock, flags);
if (magnitude == 0) {
value[0] = 0xf5;
value[1] = 0x00;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
if (magnitude <= 0xaaaa) {
expand_a = 0x0c * magnitude;
expand_b = 0x80 * magnitude;
} else {
expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
}
/* Adjust for non-MOMO wheels */
switch (entry->wdata.product_id) {
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
break;
default:
expand_a = expand_a >> 1;
break;
}
value[0] = 0xfe;
value[1] = 0x0d;
value[2] = expand_a / 0xaaaa;
value[3] = expand_a / 0xaaaa;
value[4] = expand_b / 0xaaaa;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
/* Activate Auto-Center */
value[0] = 0x14;
value[1] = 0x00;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends autocentering command compatible with Formula Force EX */
static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
{
struct hid_device *hid = input_get_drvdata(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
s32 *value;
magnitude = magnitude * 90 / 65535;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return;
}
value = entry->report->field[0]->value;
spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xfe;
value[1] = 0x03;
value[2] = magnitude >> 14;
value[3] = magnitude >> 14;
value[4] = magnitude;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends command to set range compatible with G25/G27/Driving Force GT */
static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
{
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
s32 *value;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return;
}
value = entry->report->field[0]->value;
dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x81;
value[2] = range & 0x00ff;
value[3] = (range & 0xff00) >> 8;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends commands to set range compatible with Driving Force Pro wheel */
static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
{
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
int start_left, start_right, full_range;
s32 *value;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return;
}
value = entry->report->field[0]->value;
dbg_hid("Driving Force Pro: setting range to %u\n", range);
/* Prepare "coarse" limit command */
spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x00; /* Set later */
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
if (range > 200) {
value[1] = 0x03;
full_range = 900;
} else {
value[1] = 0x02;
full_range = 200;
}
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
/* Prepare "fine" limit command */
value[0] = 0x81;
value[1] = 0x0b;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
if (range == 200 || range == 900) { /* Do not apply any fine limit */
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
/* Construct fine limit command */
start_left = (((full_range - range + 1) * 2047) / full_range);
start_right = 0xfff - start_left;
value[2] = start_left >> 4;
value[3] = start_right >> 4;
value[4] = 0xff;
value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
value[6] = 0xff;
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
spin_unlock_irqrestore(&entry->report_lock, flags);
}
static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
{
switch (real_product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
switch (target_product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
return &lg4ff_mode_switch_ext01_dfp;
/* DFP can only be switched to its native mode */
default:
return NULL;
}
break;
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
switch (target_product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
return &lg4ff_mode_switch_ext01_dfp;
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
return &lg4ff_mode_switch_ext16_g25;
/* G25 can only be switched to DFP mode or its native mode */
default:
return NULL;
}
break;
case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
switch (target_product_id) {
case USB_DEVICE_ID_LOGITECH_WHEEL:
return &lg4ff_mode_switch_ext09_dfex;
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
return &lg4ff_mode_switch_ext09_dfp;
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
return &lg4ff_mode_switch_ext09_g25;
case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
return &lg4ff_mode_switch_ext09_g27;
/* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
default:
return NULL;
}
break;
case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
switch (target_product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
return &lg4ff_mode_switch_ext09_dfp;
case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
return &lg4ff_mode_switch_ext09_dfgt;
case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
return &lg4ff_mode_switch_ext09_g25;
case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
return &lg4ff_mode_switch_ext09_g27;
case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
return &lg4ff_mode_switch_ext09_g29;
/* G29 can only be switched to DF-EX, DFP, DFGT, G25, G27 or its native mode */
default:
return NULL;
}
break;
case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
switch (target_product_id) {
case USB_DEVICE_ID_LOGITECH_WHEEL:
return &lg4ff_mode_switch_ext09_dfex;
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
return &lg4ff_mode_switch_ext09_dfp;
case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
return &lg4ff_mode_switch_ext09_dfgt;
/* DFGT can only be switched to DF-EX, DFP or its native mode */
default:
return NULL;
}
break;
/* No other wheels have multiple modes */
default:
return NULL;
}
}
static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
{
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
s32 *value;
u8 i;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return -EINVAL;
}
value = entry->report->field[0]->value;
spin_lock_irqsave(&entry->report_lock, flags);
for (i = 0; i < s->cmd_count; i++) {
u8 j;
for (j = 0; j < 7; j++)
value[j] = s->cmd[j + (7*i)];
hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
}
spin_unlock_irqrestore(&entry->report_lock, flags);
hid_hw_wait(hid);
return 0;
}
static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
ssize_t count = 0;
int i;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return 0;
}
if (!entry->wdata.real_name) {
hid_err(hid, "NULL pointer to string\n");
return 0;
}
for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
if (entry->wdata.alternate_modes & BIT(i)) {
/* Print tag and full name */
count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
lg4ff_alternate_modes[i].tag,
!lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
if (count >= PAGE_SIZE - 1)
return count;
/* Mark the currently active mode with an asterisk */
if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
(lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
else
count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
if (count >= PAGE_SIZE - 1)
return count;
}
}
return count;
}
static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
const struct lg4ff_compat_mode_switch *s;
u16 target_product_id = 0;
int i, ret;
char *lbuf;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return -EINVAL;
}
/* Allow \n at the end of the input parameter */
lbuf = kasprintf(GFP_KERNEL, "%s", buf);
if (!lbuf)
return -ENOMEM;
i = strlen(lbuf);
if (lbuf[i-1] == '\n') {
if (i == 1) {
kfree(lbuf);
return -EINVAL;
}
lbuf[i-1] = '\0';
}
for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
const char *tag = lg4ff_alternate_modes[i].tag;
if (entry->wdata.alternate_modes & BIT(i)) {
if (!strcmp(tag, lbuf)) {
if (!mode_product_id)
target_product_id = entry->wdata.real_product_id;
else
target_product_id = mode_product_id;
break;
}
}
}
if (i == LG4FF_MODE_MAX_IDX) {
hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
kfree(lbuf);
return -EINVAL;
}
kfree(lbuf); /* Not needed anymore */
if (target_product_id == entry->wdata.product_id) /* Nothing to do */
return count;
/* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
hid_info(hid, "\"%s\" cannot be switched to \"DF-EX\" mode. Load the \"hid_logitech\" module with \"lg4ff_no_autoswitch=1\" parameter set and try again\n",
entry->wdata.real_name);
return -EINVAL;
}
/* Take care of hardware limitations */
if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
entry->wdata.product_id > target_product_id) {
hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
return -EINVAL;
}
s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
if (!s) {
hid_err(hid, "Invalid target product ID %X\n", target_product_id);
return -EINVAL;
}
ret = lg4ff_switch_compatibility_mode(hid, s);
return (ret == 0 ? count : ret);
}
static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
static ssize_t lg4ff_combine_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
size_t count;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return 0;
}
count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.combine);
return count;
}
static ssize_t lg4ff_combine_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
u16 combine = simple_strtoul(buf, NULL, 10);
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return -EINVAL;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return -EINVAL;
}
if (combine > 1)
combine = 1;
entry->wdata.combine = combine;
return count;
}
static DEVICE_ATTR(combine_pedals, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_combine_show, lg4ff_combine_store);
/* Export the currently set range of the wheel */
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
size_t count;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
entry = drv_data->device_props;