?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
[linux/fpc-iii.git] / drivers / hid / hid-lg4ff.c
blob512d67e1aae386e37b90288f800734b5a826aebe
1 /*
2 * Force feedback support for Logitech Gaming Wheels
3 *
4 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
5 * Speed Force Wireless (WiiWheel)
6 *
7 * Copyright (c) 2010 Simon Wood <simon@mungewell.org>
8 */
9
10 /*
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26
27 #include <linux/input.h>
28 #include <linux/usb.h>
29 #include <linux/hid.h>
30
31 #include "usbhid/usbhid.h"
32 #include "hid-lg.h"
33 #include "hid-lg4ff.h"
34 #include "hid-ids.h"
35
36 #define LG4FF_MMODE_IS_MULTIMODE 0
37 #define LG4FF_MMODE_SWITCHED 1
38 #define LG4FF_MMODE_NOT_MULTIMODE 2
39
40 #define LG4FF_MODE_NATIVE_IDX 0
41 #define LG4FF_MODE_DFEX_IDX 1
42 #define LG4FF_MODE_DFP_IDX 2
43 #define LG4FF_MODE_G25_IDX 3
44 #define LG4FF_MODE_DFGT_IDX 4
45 #define LG4FF_MODE_G27_IDX 5
46 #define LG4FF_MODE_G29_IDX 6
47 #define LG4FF_MODE_MAX_IDX 7
48
49 #define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
50 #define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
51 #define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
52 #define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
53 #define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
54 #define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
55 #define LG4FF_MODE_G29 BIT(LG4FF_MODE_G29_IDX)
56
57 #define LG4FF_DFEX_TAG "DF-EX"
58 #define LG4FF_DFEX_NAME "Driving Force / Formula EX"
59 #define LG4FF_DFP_TAG "DFP"
60 #define LG4FF_DFP_NAME "Driving Force Pro"
61 #define LG4FF_G25_TAG "G25"
62 #define LG4FF_G25_NAME "G25 Racing Wheel"
63 #define LG4FF_G27_TAG "G27"
64 #define LG4FF_G27_NAME "G27 Racing Wheel"
65 #define LG4FF_G29_TAG "G29"
66 #define LG4FF_G29_NAME "G29 Racing Wheel"
67 #define LG4FF_DFGT_TAG "DFGT"
68 #define LG4FF_DFGT_NAME "Driving Force GT"
69
70 #define LG4FF_FFEX_REV_MAJ 0x21
71 #define LG4FF_FFEX_REV_MIN 0x00
72
73 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
74 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
75
76 struct lg4ff_wheel_data {
77 const u32 product_id;
78 u16 combine;
79 u16 range;
80 const u16 min_range;
81 const u16 max_range;
82 #ifdef CONFIG_LEDS_CLASS
83 u8 led_state;
84 struct led_classdev *led[5];
85 #endif
86 const u32 alternate_modes;
87 const char * const real_tag;
88 const char * const real_name;
89 const u16 real_product_id;
90
91 void (*set_range)(struct hid_device *hid, u16 range);
92 };
93
94 struct lg4ff_device_entry {
95 spinlock_t report_lock; /* Protect output HID report */
96 struct hid_report *report;
97 struct lg4ff_wheel_data wdata;
98 };
99
100 static const signed short lg4ff_wheel_effects[] = {
101 FF_CONSTANT,
102 FF_AUTOCENTER,
103 -1
104 };
105
106 struct lg4ff_wheel {
107 const u32 product_id;
108 const signed short *ff_effects;
109 const u16 min_range;
110 const u16 max_range;
111 void (*set_range)(struct hid_device *hid, u16 range);
112 };
113
114 struct lg4ff_compat_mode_switch {
115 const u8 cmd_count; /* Number of commands to send */
116 const u8 cmd[];
117 };
118
119 struct lg4ff_wheel_ident_info {
120 const u32 modes;
121 const u16 mask;
122 const u16 result;
123 const u16 real_product_id;
124 };
125
126 struct lg4ff_multimode_wheel {
127 const u16 product_id;
128 const u32 alternate_modes;
129 const char *real_tag;
130 const char *real_name;
131 };
132
133 struct lg4ff_alternate_mode {
134 const u16 product_id;
135 const char *tag;
136 const char *name;
137 };
138
139 static const struct lg4ff_wheel lg4ff_devices[] = {
140 {USB_DEVICE_ID_LOGITECH_WINGMAN_FFG, lg4ff_wheel_effects, 40, 180, NULL},
141 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
142 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
143 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
144 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
145 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
146 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
147 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
148 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
149 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
150 };
151
152 static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
153 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
154 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
155 LG4FF_DFP_TAG, LG4FF_DFP_NAME},
156 {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
157 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
158 LG4FF_G25_TAG, LG4FF_G25_NAME},
159 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
160 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
161 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
162 {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
163 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
164 LG4FF_G27_TAG, LG4FF_G27_NAME},
165 {USB_DEVICE_ID_LOGITECH_G29_WHEEL,
166 LG4FF_MODE_NATIVE | LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
167 LG4FF_G29_TAG, LG4FF_G29_NAME},
168 };
169
170 static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
171 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
172 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
173 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
174 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
175 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
176 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME},
177 [LG4FF_MODE_G29_IDX] = {USB_DEVICE_ID_LOGITECH_G29_WHEEL, LG4FF_G29_TAG, LG4FF_G29_NAME},
178 };
179
180 /* Multimode wheel identificators */
181 static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
182 LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
183 0xf000,
184 0x1000,
185 USB_DEVICE_ID_LOGITECH_DFP_WHEEL
186 };
187
188 static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
189 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
190 0xff00,
191 0x1200,
192 USB_DEVICE_ID_LOGITECH_G25_WHEEL
193 };
194
195 static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
196 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
197 0xfff0,
198 0x1230,
199 USB_DEVICE_ID_LOGITECH_G27_WHEEL
200 };
201
202 static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
203 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
204 0xff00,
205 0x1300,
206 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
207 };
208
209 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info = {
210 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
211 0xfff8,
212 0x1350,
213 USB_DEVICE_ID_LOGITECH_G29_WHEEL
214 };
215
216 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info2 = {
217 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
218 0xff00,
219 0x8900,
220 USB_DEVICE_ID_LOGITECH_G29_WHEEL
221 };
222
223 /* Multimode wheel identification checklists */
224 static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = {
225 &lg4ff_g29_ident_info,
226 &lg4ff_g29_ident_info2,
227 &lg4ff_dfgt_ident_info,
228 &lg4ff_g27_ident_info,
229 &lg4ff_g25_ident_info,
230 &lg4ff_dfp_ident_info
231 };
232
233 /* Compatibility mode switching commands */
234 /* EXT_CMD9 - Understood by G27 and DFGT */
235 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
236 2,
237 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
238 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
239 };
240
241 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
242 2,
243 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
244 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
245 };
246
247 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
248 2,
249 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
250 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
251 };
252
253 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
254 2,
255 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
256 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
257 };
258
259 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
260 2,
261 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
262 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
263 };
264
265 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g29 = {
266 2,
267 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
268 0xf8, 0x09, 0x05, 0x01, 0x01, 0x00, 0x00} /* Switch mode to G29 with detach */
269 };
270
271 /* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
272 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
273 1,
274 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
275 };
276
277 /* EXT_CMD16 - Understood by G25 and G27 */
278 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
279 1,
280 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
281 };
282
283 /* Recalculates X axis value accordingly to currently selected range */
284 static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
285 {
286 u16 max_range;
287 s32 new_value;
288
289 if (range == 900)
290 return value;
291 else if (range == 200)
292 return value;
293 else if (range < 200)
294 max_range = 200;
295 else
296 max_range = 900;
297
298 new_value = 8192 + mult_frac(value - 8192, max_range, range);
299 if (new_value < 0)
300 return 0;
301 else if (new_value > 16383)
302 return 16383;
303 else
304 return new_value;
305 }
306
307 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
308 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
309 {
310 struct lg4ff_device_entry *entry = drv_data->device_props;
311 s32 new_value = 0;
312
313 if (!entry) {
314 hid_err(hid, "Device properties not found");
315 return 0;
316 }
317
318 switch (entry->wdata.product_id) {
319 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
320 switch (usage->code) {
321 case ABS_X:
322 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
323 input_event(field->hidinput->input, usage->type, usage->code, new_value);
324 return 1;
325 default:
326 return 0;
327 }
328 default:
329 return 0;
330 }
331 }
332
333 int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
334 u8 *rd, int size, struct lg_drv_data *drv_data)
335 {
336 int offset;
337 struct lg4ff_device_entry *entry = drv_data->device_props;
338
339 if (!entry)
340 return 0;
341
342 /* adjust HID report present combined pedals data */
343 if (entry->wdata.combine) {
344 switch (entry->wdata.product_id) {
345 case USB_DEVICE_ID_LOGITECH_WHEEL:
346 rd[5] = rd[3];
347 rd[6] = 0x7F;
348 return 1;
349 case USB_DEVICE_ID_LOGITECH_WINGMAN_FFG:
350 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
351 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
352 rd[4] = rd[3];
353 rd[5] = 0x7F;
354 return 1;
355 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
356 rd[5] = rd[4];
357 rd[6] = 0x7F;
358 return 1;
359 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
360 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
361 offset = 5;
362 break;
363 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
364 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
365 offset = 6;
366 break;
367 case USB_DEVICE_ID_LOGITECH_WII_WHEEL:
368 offset = 3;
369 break;
370 default:
371 return 0;
372 }
373
374 /* Compute a combined axis when wheel does not supply it */
375 rd[offset] = (0xFF + rd[offset] - rd[offset+1]) >> 1;
376 rd[offset+1] = 0x7F;
377 return 1;
378 }
379
380 return 0;
381 }
382
383 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
384 const struct lg4ff_multimode_wheel *mmode_wheel,
385 const u16 real_product_id)
386 {
387 u32 alternate_modes = 0;
388 const char *real_tag = NULL;
389 const char *real_name = NULL;
390
391 if (mmode_wheel) {
392 alternate_modes = mmode_wheel->alternate_modes;
393 real_tag = mmode_wheel->real_tag;
394 real_name = mmode_wheel->real_name;
395 }
396
397 {
398 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
399 .real_product_id = real_product_id,
400 .combine = 0,
401 .min_range = wheel->min_range,
402 .max_range = wheel->max_range,
403 .set_range = wheel->set_range,
404 .alternate_modes = alternate_modes,
405 .real_tag = real_tag,
406 .real_name = real_name };
407
408 memcpy(wdata, &t_wdata, sizeof(t_wdata));
409 }
410 }
411
412 static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
413 {
414 struct hid_device *hid = input_get_drvdata(dev);
415 struct lg4ff_device_entry *entry;
416 struct lg_drv_data *drv_data;
417 unsigned long flags;
418 s32 *value;
419 int x;
420
421 drv_data = hid_get_drvdata(hid);
422 if (!drv_data) {
423 hid_err(hid, "Private driver data not found!\n");
424 return -EINVAL;
425 }
426
427 entry = drv_data->device_props;
428 if (!entry) {
429 hid_err(hid, "Device properties not found!\n");
430 return -EINVAL;
431 }
432 value = entry->report->field[0]->value;
433
434 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
435
436 switch (effect->type) {
437 case FF_CONSTANT:
438 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
439 CLAMP(x);
440
441 spin_lock_irqsave(&entry->report_lock, flags);
442 if (x == 0x80) {
443 /* De-activate force in slot-1*/
444 value[0] = 0x13;
445 value[1] = 0x00;
446 value[2] = 0x00;
447 value[3] = 0x00;
448 value[4] = 0x00;
449 value[5] = 0x00;
450 value[6] = 0x00;
451
452 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
453 spin_unlock_irqrestore(&entry->report_lock, flags);
454 return 0;
455 }
456
457 value[0] = 0x11; /* Slot 1 */
458 value[1] = 0x08;
459 value[2] = x;
460 value[3] = 0x80;
461 value[4] = 0x00;
462 value[5] = 0x00;
463 value[6] = 0x00;
464
465 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
466 spin_unlock_irqrestore(&entry->report_lock, flags);
467 break;
468 }
469 return 0;
470 }
471
472 /* Sends default autocentering command compatible with
473 * all wheels except Formula Force EX */
474 static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
475 {
476 struct hid_device *hid = input_get_drvdata(dev);
477 s32 *value;
478 u32 expand_a, expand_b;
479 struct lg4ff_device_entry *entry;
480 struct lg_drv_data *drv_data;
481 unsigned long flags;
482
483 drv_data = hid_get_drvdata(hid);
484 if (!drv_data) {
485 hid_err(hid, "Private driver data not found!\n");
486 return;
487 }
488
489 entry = drv_data->device_props;
490 if (!entry) {
491 hid_err(hid, "Device properties not found!\n");
492 return;
493 }
494 value = entry->report->field[0]->value;
495
496 /* De-activate Auto-Center */
497 spin_lock_irqsave(&entry->report_lock, flags);
498 if (magnitude == 0) {
499 value[0] = 0xf5;
500 value[1] = 0x00;
501 value[2] = 0x00;
502 value[3] = 0x00;
503 value[4] = 0x00;
504 value[5] = 0x00;
505 value[6] = 0x00;
506
507 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
508 spin_unlock_irqrestore(&entry->report_lock, flags);
509 return;
510 }
511
512 if (magnitude <= 0xaaaa) {
513 expand_a = 0x0c * magnitude;
514 expand_b = 0x80 * magnitude;
515 } else {
516 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
517 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
518 }
519
520 /* Adjust for non-MOMO wheels */
521 switch (entry->wdata.product_id) {
522 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
523 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
524 break;
525 default:
526 expand_a = expand_a >> 1;
527 break;
528 }
529
530 value[0] = 0xfe;
531 value[1] = 0x0d;
532 value[2] = expand_a / 0xaaaa;
533 value[3] = expand_a / 0xaaaa;
534 value[4] = expand_b / 0xaaaa;
535 value[5] = 0x00;
536 value[6] = 0x00;
537
538 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
539
540 /* Activate Auto-Center */
541 value[0] = 0x14;
542 value[1] = 0x00;
543 value[2] = 0x00;
544 value[3] = 0x00;
545 value[4] = 0x00;
546 value[5] = 0x00;
547 value[6] = 0x00;
548
549 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
550 spin_unlock_irqrestore(&entry->report_lock, flags);
551 }
552
553 /* Sends autocentering command compatible with Formula Force EX */
554 static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
555 {
556 struct hid_device *hid = input_get_drvdata(dev);
557 struct lg4ff_device_entry *entry;
558 struct lg_drv_data *drv_data;
559 unsigned long flags;
560 s32 *value;
561 magnitude = magnitude * 90 / 65535;
562
563 drv_data = hid_get_drvdata(hid);
564 if (!drv_data) {
565 hid_err(hid, "Private driver data not found!\n");
566 return;
567 }
568
569 entry = drv_data->device_props;
570 if (!entry) {
571 hid_err(hid, "Device properties not found!\n");
572 return;
573 }
574 value = entry->report->field[0]->value;
575
576 spin_lock_irqsave(&entry->report_lock, flags);
577 value[0] = 0xfe;
578 value[1] = 0x03;
579 value[2] = magnitude >> 14;
580 value[3] = magnitude >> 14;
581 value[4] = magnitude;
582 value[5] = 0x00;
583 value[6] = 0x00;
584
585 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
586 spin_unlock_irqrestore(&entry->report_lock, flags);
587 }
588
589 /* Sends command to set range compatible with G25/G27/Driving Force GT */
590 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
591 {
592 struct lg4ff_device_entry *entry;
593 struct lg_drv_data *drv_data;
594 unsigned long flags;
595 s32 *value;
596
597 drv_data = hid_get_drvdata(hid);
598 if (!drv_data) {
599 hid_err(hid, "Private driver data not found!\n");
600 return;
601 }
602
603 entry = drv_data->device_props;
604 if (!entry) {
605 hid_err(hid, "Device properties not found!\n");
606 return;
607 }
608 value = entry->report->field[0]->value;
609 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
610
611 spin_lock_irqsave(&entry->report_lock, flags);
612 value[0] = 0xf8;
613 value[1] = 0x81;
614 value[2] = range & 0x00ff;
615 value[3] = (range & 0xff00) >> 8;
616 value[4] = 0x00;
617 value[5] = 0x00;
618 value[6] = 0x00;
619
620 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
621 spin_unlock_irqrestore(&entry->report_lock, flags);
622 }
623
624 /* Sends commands to set range compatible with Driving Force Pro wheel */
625 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
626 {
627 struct lg4ff_device_entry *entry;
628 struct lg_drv_data *drv_data;
629 unsigned long flags;
630 int start_left, start_right, full_range;
631 s32 *value;
632
633 drv_data = hid_get_drvdata(hid);
634 if (!drv_data) {
635 hid_err(hid, "Private driver data not found!\n");
636 return;
637 }
638
639 entry = drv_data->device_props;
640 if (!entry) {
641 hid_err(hid, "Device properties not found!\n");
642 return;
643 }
644 value = entry->report->field[0]->value;
645 dbg_hid("Driving Force Pro: setting range to %u\n", range);
646
647 /* Prepare "coarse" limit command */
648 spin_lock_irqsave(&entry->report_lock, flags);
649 value[0] = 0xf8;
650 value[1] = 0x00; /* Set later */
651 value[2] = 0x00;
652 value[3] = 0x00;
653 value[4] = 0x00;
654 value[5] = 0x00;
655 value[6] = 0x00;
656
657 if (range > 200) {
658 value[1] = 0x03;
659 full_range = 900;
660 } else {
661 value[1] = 0x02;
662 full_range = 200;
663 }
664 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
665
666 /* Prepare "fine" limit command */
667 value[0] = 0x81;
668 value[1] = 0x0b;
669 value[2] = 0x00;
670 value[3] = 0x00;
671 value[4] = 0x00;
672 value[5] = 0x00;
673 value[6] = 0x00;
674
675 if (range == 200 || range == 900) { /* Do not apply any fine limit */
676 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
677 spin_unlock_irqrestore(&entry->report_lock, flags);
678 return;
679 }
680
681 /* Construct fine limit command */
682 start_left = (((full_range - range + 1) * 2047) / full_range);
683 start_right = 0xfff - start_left;
684
685 value[2] = start_left >> 4;
686 value[3] = start_right >> 4;
687 value[4] = 0xff;
688 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
689 value[6] = 0xff;
690
691 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
692 spin_unlock_irqrestore(&entry->report_lock, flags);
693 }
694
695 static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
696 {
697 switch (real_product_id) {
698 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
699 switch (target_product_id) {
700 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
701 return &lg4ff_mode_switch_ext01_dfp;
702 /* DFP can only be switched to its native mode */
703 default:
704 return NULL;
705 }
706 break;
707 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
708 switch (target_product_id) {
709 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
710 return &lg4ff_mode_switch_ext01_dfp;
711 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
712 return &lg4ff_mode_switch_ext16_g25;
713 /* G25 can only be switched to DFP mode or its native mode */
714 default:
715 return NULL;
716 }
717 break;
718 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
719 switch (target_product_id) {
720 case USB_DEVICE_ID_LOGITECH_WHEEL:
721 return &lg4ff_mode_switch_ext09_dfex;
722 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
723 return &lg4ff_mode_switch_ext09_dfp;
724 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
725 return &lg4ff_mode_switch_ext09_g25;
726 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
727 return &lg4ff_mode_switch_ext09_g27;
728 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
729 default:
730 return NULL;
731 }
732 break;
733 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
734 switch (target_product_id) {
735 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
736 return &lg4ff_mode_switch_ext09_dfp;
737 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
738 return &lg4ff_mode_switch_ext09_dfgt;
739 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
740 return &lg4ff_mode_switch_ext09_g25;
741 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
742 return &lg4ff_mode_switch_ext09_g27;
743 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
744 return &lg4ff_mode_switch_ext09_g29;
745 /* G29 can only be switched to DF-EX, DFP, DFGT, G25, G27 or its native mode */
746 default:
747 return NULL;
748 }
749 break;
750 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
751 switch (target_product_id) {
752 case USB_DEVICE_ID_LOGITECH_WHEEL:
753 return &lg4ff_mode_switch_ext09_dfex;
754 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
755 return &lg4ff_mode_switch_ext09_dfp;
756 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
757 return &lg4ff_mode_switch_ext09_dfgt;
758 /* DFGT can only be switched to DF-EX, DFP or its native mode */
759 default:
760 return NULL;
761 }
762 break;
763 /* No other wheels have multiple modes */
764 default:
765 return NULL;
766 }
767 }
768
769 static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
770 {
771 struct lg4ff_device_entry *entry;
772 struct lg_drv_data *drv_data;
773 unsigned long flags;
774 s32 *value;
775 u8 i;
776
777 drv_data = hid_get_drvdata(hid);
778 if (!drv_data) {
779 hid_err(hid, "Private driver data not found!\n");
780 return -EINVAL;
781 }
782
783 entry = drv_data->device_props;
784 if (!entry) {
785 hid_err(hid, "Device properties not found!\n");
786 return -EINVAL;
787 }
788 value = entry->report->field[0]->value;
789
790 spin_lock_irqsave(&entry->report_lock, flags);
791 for (i = 0; i < s->cmd_count; i++) {
792 u8 j;
793
794 for (j = 0; j < 7; j++)
795 value[j] = s->cmd[j + (7*i)];
796
797 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
798 }
799 spin_unlock_irqrestore(&entry->report_lock, flags);
800 hid_hw_wait(hid);
801 return 0;
802 }
803
804 static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
805 {
806 struct hid_device *hid = to_hid_device(dev);
807 struct lg4ff_device_entry *entry;
808 struct lg_drv_data *drv_data;
809 ssize_t count = 0;
810 int i;
811
812 drv_data = hid_get_drvdata(hid);
813 if (!drv_data) {
814 hid_err(hid, "Private driver data not found!\n");
815 return 0;
816 }
817
818 entry = drv_data->device_props;
819 if (!entry) {
820 hid_err(hid, "Device properties not found!\n");
821 return 0;
822 }
823
824 if (!entry->wdata.real_name) {
825 hid_err(hid, "NULL pointer to string\n");
826 return 0;
827 }
828
829 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
830 if (entry->wdata.alternate_modes & BIT(i)) {
831 /* Print tag and full name */
832 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
833 lg4ff_alternate_modes[i].tag,
834 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
835 if (count >= PAGE_SIZE - 1)
836 return count;
837
838 /* Mark the currently active mode with an asterisk */
839 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
840 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
841 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
842 else
843 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
844
845 if (count >= PAGE_SIZE - 1)
846 return count;
847 }
848 }
849
850 return count;
851 }
852
853 static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
854 {
855 struct hid_device *hid = to_hid_device(dev);
856 struct lg4ff_device_entry *entry;
857 struct lg_drv_data *drv_data;
858 const struct lg4ff_compat_mode_switch *s;
859 u16 target_product_id = 0;
860 int i, ret;
861 char *lbuf;
862
863 drv_data = hid_get_drvdata(hid);
864 if (!drv_data) {
865 hid_err(hid, "Private driver data not found!\n");
866 return -EINVAL;
867 }
868
869 entry = drv_data->device_props;
870 if (!entry) {
871 hid_err(hid, "Device properties not found!\n");
872 return -EINVAL;
873 }
874
875 /* Allow \n at the end of the input parameter */
876 lbuf = kasprintf(GFP_KERNEL, "%s", buf);
877 if (!lbuf)
878 return -ENOMEM;
879
880 i = strlen(lbuf);
881 if (lbuf[i-1] == '\n') {
882 if (i == 1) {
883 kfree(lbuf);
884 return -EINVAL;
885 }
886 lbuf[i-1] = '\0';
887 }
888
889 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
890 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
891 const char *tag = lg4ff_alternate_modes[i].tag;
892
893 if (entry->wdata.alternate_modes & BIT(i)) {
894 if (!strcmp(tag, lbuf)) {
895 if (!mode_product_id)
896 target_product_id = entry->wdata.real_product_id;
897 else
898 target_product_id = mode_product_id;
899 break;
900 }
901 }
902 }
903
904 if (i == LG4FF_MODE_MAX_IDX) {
905 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
906 kfree(lbuf);
907 return -EINVAL;
908 }
909 kfree(lbuf); /* Not needed anymore */
910
911 if (target_product_id == entry->wdata.product_id) /* Nothing to do */
912 return count;
913
914 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
915 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
916 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",
917 entry->wdata.real_name);
918 return -EINVAL;
919 }
920
921 /* Take care of hardware limitations */
922 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
923 entry->wdata.product_id > target_product_id) {
924 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
925 return -EINVAL;
926 }
927
928 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
929 if (!s) {
930 hid_err(hid, "Invalid target product ID %X\n", target_product_id);
931 return -EINVAL;
932 }
933
934 ret = lg4ff_switch_compatibility_mode(hid, s);
935 return (ret == 0 ? count : ret);
936 }
937 static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
938
939 static ssize_t lg4ff_combine_show(struct device *dev, struct device_attribute *attr,
940 char *buf)
941 {
942 struct hid_device *hid = to_hid_device(dev);
943 struct lg4ff_device_entry *entry;
944 struct lg_drv_data *drv_data;
945 size_t count;
946
947 drv_data = hid_get_drvdata(hid);
948 if (!drv_data) {
949 hid_err(hid, "Private driver data not found!\n");
950 return 0;
951 }
952
953 entry = drv_data->device_props;
954 if (!entry) {
955 hid_err(hid, "Device properties not found!\n");
956 return 0;
957 }
958
959 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.combine);
960 return count;
961 }
962
963 static ssize_t lg4ff_combine_store(struct device *dev, struct device_attribute *attr,
964 const char *buf, size_t count)
965 {
966 struct hid_device *hid = to_hid_device(dev);
967 struct lg4ff_device_entry *entry;
968 struct lg_drv_data *drv_data;
969 u16 combine = simple_strtoul(buf, NULL, 10);
970
971 drv_data = hid_get_drvdata(hid);
972 if (!drv_data) {
973 hid_err(hid, "Private driver data not found!\n");
974 return -EINVAL;
975 }
976
977 entry = drv_data->device_props;
978 if (!entry) {
979 hid_err(hid, "Device properties not found!\n");
980 return -EINVAL;
981 }
982
983 if (combine > 1)
984 combine = 1;
985
986 entry->wdata.combine = combine;
987 return count;
988 }
989 static DEVICE_ATTR(combine_pedals, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_combine_show, lg4ff_combine_store);
990
991 /* Export the currently set range of the wheel */
992 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
993 char *buf)
994 {
995 struct hid_device *hid = to_hid_device(dev);
996 struct lg4ff_device_entry *entry;
997 struct lg_drv_data *drv_data;
998 size_t count;
999
1000 drv_data = hid_get_drvdata(hid);
1001 if (!drv_data) {
1002 hid_err(hid, "Private driver data not found!\n");
1003 return 0;
1004 }
1005
1006 entry = drv_data->device_props;
1007 if (!entry) {
1008 hid_err(hid, "Device properties not found!\n");
1009 return 0;
1010 }
1011
1012 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
1013 return count;
1014 }
1015
1016 /* Set range to user specified value, call appropriate function
1017 * according to the type of the wheel */
1018 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr,
1019 const char *buf, size_t count)
1020 {
1021 struct hid_device *hid = to_hid_device(dev);
1022 struct lg4ff_device_entry *entry;
1023 struct lg_drv_data *drv_data;
1024 u16 range = simple_strtoul(buf, NULL, 10);
1025
1026 drv_data = hid_get_drvdata(hid);
1027 if (!drv_data) {
1028 hid_err(hid, "Private driver data not found!\n");
1029 return -EINVAL;
1030 }
1031
1032 entry = drv_data->device_props;
1033 if (!entry) {
1034 hid_err(hid, "Device properties not found!\n");
1035 return -EINVAL;
1036 }
1037
1038 if (range == 0)
1039 range = entry->wdata.max_range;
1040
1041 /* Check if the wheel supports range setting
1042 * and that the range is within limits for the wheel */
1043 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
1044 entry->wdata.set_range(hid, range);
1045 entry->wdata.range = range;
1046 }
1047
1048 return count;
1049 }
1050 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
1051
1052 static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
1053 {
1054 struct hid_device *hid = to_hid_device(dev);
1055 struct lg4ff_device_entry *entry;
1056 struct lg_drv_data *drv_data;
1057 size_t count;
1058
1059 drv_data = hid_get_drvdata(hid);
1060 if (!drv_data) {
1061 hid_err(hid, "Private driver data not found!\n");
1062 return 0;
1063 }
1064
1065 entry = drv_data->device_props;
1066 if (!entry) {
1067 hid_err(hid, "Device properties not found!\n");
1068 return 0;
1069 }
1070
1071 if (!entry->wdata.real_tag || !entry->wdata.real_name) {
1072 hid_err(hid, "NULL pointer to string\n");
1073 return 0;
1074 }
1075
1076 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
1077 return count;
1078 }
1079
1080 static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1081 {
1082 /* Real ID is a read-only value */
1083 return -EPERM;
1084 }
1085 static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
1086
1087 #ifdef CONFIG_LEDS_CLASS
1088 static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
1089 {
1090 struct lg_drv_data *drv_data;
1091 struct lg4ff_device_entry *entry;
1092 unsigned long flags;
1093 s32 *value;
1094
1095 drv_data = hid_get_drvdata(hid);
1096 if (!drv_data) {
1097 hid_err(hid, "Private driver data not found!\n");
1098 return;
1099 }
1100
1101 entry = drv_data->device_props;
1102 if (!entry) {
1103 hid_err(hid, "Device properties not found!\n");
1104 return;
1105 }
1106 value = entry->report->field[0]->value;
1107
1108 spin_lock_irqsave(&entry->report_lock, flags);
1109 value[0] = 0xf8;
1110 value[1] = 0x12;
1111 value[2] = leds;
1112 value[3] = 0x00;
1113 value[4] = 0x00;
1114 value[5] = 0x00;
1115 value[6] = 0x00;
1116 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
1117 spin_unlock_irqrestore(&entry->report_lock, flags);
1118 }
1119
1120 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
1121 enum led_brightness value)
1122 {
1123 struct device *dev = led_cdev->dev->parent;
1124 struct hid_device *hid = to_hid_device(dev);
1125 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1126 struct lg4ff_device_entry *entry;
1127 int i, state = 0;
1128
1129 if (!drv_data) {
1130 hid_err(hid, "Device data not found.");
1131 return;
1132 }
1133
1134 entry = drv_data->device_props;
1135
1136 if (!entry) {
1137 hid_err(hid, "Device properties not found.");
1138 return;
1139 }
1140
1141 for (i = 0; i < 5; i++) {
1142 if (led_cdev != entry->wdata.led[i])
1143 continue;
1144 state = (entry->wdata.led_state >> i) & 1;
1145 if (value == LED_OFF && state) {
1146 entry->wdata.led_state &= ~(1 << i);
1147 lg4ff_set_leds(hid, entry->wdata.led_state);
1148 } else if (value != LED_OFF && !state) {
1149 entry->wdata.led_state |= 1 << i;
1150 lg4ff_set_leds(hid, entry->wdata.led_state);
1151 }
1152 break;
1153 }
1154 }
1155
1156 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
1157 {
1158 struct device *dev = led_cdev->dev->parent;
1159 struct hid_device *hid = to_hid_device(dev);
1160 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1161 struct lg4ff_device_entry *entry;
1162 int i, value = 0;
1163
1164 if (!drv_data) {
1165 hid_err(hid, "Device data not found.");
1166 return LED_OFF;
1167 }
1168
1169 entry = drv_data->device_props;
1170
1171 if (!entry) {
1172 hid_err(hid, "Device properties not found.");
1173 return LED_OFF;
1174 }
1175
1176 for (i = 0; i < 5; i++)
1177 if (led_cdev == entry->wdata.led[i]) {
1178 value = (entry->wdata.led_state >> i) & 1;
1179 break;
1180 }
1181
1182 return value ? LED_FULL : LED_OFF;
1183 }
1184 #endif
1185
1186 static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
1187 {
1188 u32 current_mode;
1189 int i;
1190
1191 /* identify current mode from USB PID */
1192 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) {
1193 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id);
1194 if (reported_product_id == lg4ff_alternate_modes[i].product_id)
1195 break;
1196 }
1197
1198 if (i == ARRAY_SIZE(lg4ff_alternate_modes))
1199 return 0;
1200
1201 current_mode = BIT(i);
1202
1203 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) {
1204 const u16 mask = lg4ff_main_checklist[i]->mask;
1205 const u16 result = lg4ff_main_checklist[i]->result;
1206 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id;
1207
1208 if ((current_mode & lg4ff_main_checklist[i]->modes) && \
1209 (bcdDevice & mask) == result) {
1210 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
1211 return real_product_id;
1212 }
1213 }
1214
1215 /* No match found. This is either Driving Force or an unknown
1216 * wheel model, do not touch it */
1217 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
1218 return 0;
1219 }
1220
1221 static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
1222 {
1223 const u16 reported_product_id = hid->product;
1224 int ret;
1225
1226 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
1227 /* Probed wheel is not a multimode wheel */
1228 if (!*real_product_id) {
1229 *real_product_id = reported_product_id;
1230 dbg_hid("Wheel is not a multimode wheel\n");
1231 return LG4FF_MMODE_NOT_MULTIMODE;
1232 }
1233
1234 /* Switch from "Driving Force" mode to native mode automatically.
1235 * Otherwise keep the wheel in its current mode */
1236 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
1237 reported_product_id != *real_product_id &&
1238 !lg4ff_no_autoswitch) {
1239 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
1240
1241 if (!s) {
1242 hid_err(hid, "Invalid product id %X\n", *real_product_id);
1243 return LG4FF_MMODE_NOT_MULTIMODE;
1244 }
1245
1246 ret = lg4ff_switch_compatibility_mode(hid, s);
1247 if (ret) {
1248 /* Wheel could not have been switched to native mode,
1249 * leave it in "Driving Force" mode and continue */
1250 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
1251 return LG4FF_MMODE_IS_MULTIMODE;
1252 }
1253 return LG4FF_MMODE_SWITCHED;
1254 }
1255
1256 return LG4FF_MMODE_IS_MULTIMODE;
1257 }
1258
1259
1260 int lg4ff_init(struct hid_device *hid)
1261 {
1262 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1263 struct input_dev *dev = hidinput->input;
1264 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
1265 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
1266 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1267 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
1268 const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
1269 struct lg4ff_device_entry *entry;
1270 struct lg_drv_data *drv_data;
1271 int error, i, j;
1272 int mmode_ret, mmode_idx = -1;
1273 u16 real_product_id;
1274
1275 /* Check that the report looks ok */
1276 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
1277 return -1;
1278
1279 drv_data = hid_get_drvdata(hid);
1280 if (!drv_data) {
1281 hid_err(hid, "Cannot add device, private driver data not allocated\n");
1282 return -1;
1283 }
1284 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1285 if (!entry)
1286 return -ENOMEM;
1287 spin_lock_init(&entry->report_lock);
1288 entry->report = report;
1289 drv_data->device_props = entry;
1290
1291 /* Check if a multimode wheel has been connected and
1292 * handle it appropriately */
1293 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
1294
1295 /* Wheel has been told to switch to native mode. There is no point in going on
1296 * with the initialization as the wheel will do a USB reset when it switches mode
1297 */
1298 if (mmode_ret == LG4FF_MMODE_SWITCHED)
1299 return 0;
1300 else if (mmode_ret < 0) {
1301 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
1302 error = mmode_ret;
1303 goto err_init;
1304 }
1305
1306 /* Check what wheel has been connected */
1307 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
1308 if (hid->product == lg4ff_devices[i].product_id) {
1309 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
1310 break;
1311 }
1312 }
1313
1314 if (i == ARRAY_SIZE(lg4ff_devices)) {
1315 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
1316 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
1317 "Michal Maly <madcatxster@devoid-pointer.net>\n");
1318 error = -1;
1319 goto err_init;
1320 }
1321
1322 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1323 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
1324 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
1325 break;
1326 }
1327
1328 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
1329 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
1330 error = -1;
1331 goto err_init;
1332 }
1333 }
1334
1335 /* Set supported force feedback capabilities */
1336 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
1337 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
1338
1339 error = input_ff_create_memless(dev, NULL, lg4ff_play);
1340
1341 if (error)
1342 goto err_init;
1343
1344 /* Initialize device properties */
1345 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1346 BUG_ON(mmode_idx == -1);
1347 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
1348 }
1349 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
1350
1351 /* Check if autocentering is available and
1352 * set the centering force to zero by default */
1353 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
1354 /* Formula Force EX expects different autocentering command */
1355 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
1356 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
1357 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
1358 else
1359 dev->ff->set_autocenter = lg4ff_set_autocenter_default;
1360
1361 dev->ff->set_autocenter(dev, 0);
1362 }
1363
1364 /* Create sysfs interface */
1365 error = device_create_file(&hid->dev, &dev_attr_combine_pedals);
1366 if (error)
1367 hid_warn(hid, "Unable to create sysfs interface for \"combine\", errno %d\n", error);
1368 error = device_create_file(&hid->dev, &dev_attr_range);
1369 if (error)
1370 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
1371 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1372 error = device_create_file(&hid->dev, &dev_attr_real_id);
1373 if (error)
1374 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
1375 error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
1376 if (error)
1377 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error);
1378 }
1379 dbg_hid("sysfs interface created\n");
1380
1381 /* Set the maximum range to start with */
1382 entry->wdata.range = entry->wdata.max_range;
1383 if (entry->wdata.set_range)
1384 entry->wdata.set_range(hid, entry->wdata.range);
1385
1386 #ifdef CONFIG_LEDS_CLASS
1387 /* register led subsystem - G27/G29 only */
1388 entry->wdata.led_state = 0;
1389 for (j = 0; j < 5; j++)
1390 entry->wdata.led[j] = NULL;
1391
1392 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL ||
1393 lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G29_WHEEL) {
1394 struct led_classdev *led;
1395 size_t name_sz;
1396 char *name;
1397
1398 lg4ff_set_leds(hid, 0);
1399
1400 name_sz = strlen(dev_name(&hid->dev)) + 8;
1401
1402 for (j = 0; j < 5; j++) {
1403 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1404 if (!led) {
1405 hid_err(hid, "can't allocate memory for LED %d\n", j);
1406 goto err_leds;
1407 }
1408
1409 name = (void *)(&led[1]);
1410 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
1411 led->name = name;
1412 led->brightness = 0;
1413 led->max_brightness = 1;
1414 led->brightness_get = lg4ff_led_get_brightness;
1415 led->brightness_set = lg4ff_led_set_brightness;
1416
1417 entry->wdata.led[j] = led;
1418 error = led_classdev_register(&hid->dev, led);
1419
1420 if (error) {
1421 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
1422 err_leds:
1423 /* Deregister LEDs (if any) */
1424 for (j = 0; j < 5; j++) {
1425 led = entry->wdata.led[j];
1426 entry->wdata.led[j] = NULL;
1427 if (!led)
1428 continue;
1429 led_classdev_unregister(led);
1430 kfree(led);
1431 }
1432 goto out; /* Let the driver continue without LEDs */
1433 }
1434 }
1435 }
1436 out:
1437 #endif
1438 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
1439 return 0;
1440
1441 err_init:
1442 drv_data->device_props = NULL;
1443 kfree(entry);
1444 return error;
1445 }
1446
1447 int lg4ff_deinit(struct hid_device *hid)
1448 {
1449 struct lg4ff_device_entry *entry;
1450 struct lg_drv_data *drv_data;
1451
1452 drv_data = hid_get_drvdata(hid);
1453 if (!drv_data) {
1454 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
1455 return -1;
1456 }
1457 entry = drv_data->device_props;
1458 if (!entry)
1459 goto out; /* Nothing more to do */
1460
1461 /* Multimode devices will have at least the "MODE_NATIVE" bit set */
1462 if (entry->wdata.alternate_modes) {
1463 device_remove_file(&hid->dev, &dev_attr_real_id);
1464 device_remove_file(&hid->dev, &dev_attr_alternate_modes);
1465 }
1466
1467 device_remove_file(&hid->dev, &dev_attr_combine_pedals);
1468 device_remove_file(&hid->dev, &dev_attr_range);
1469 #ifdef CONFIG_LEDS_CLASS
1470 {
1471 int j;
1472 struct led_classdev *led;
1473
1474 /* Deregister LEDs (if any) */
1475 for (j = 0; j < 5; j++) {
1476
1477 led = entry->wdata.led[j];
1478 entry->wdata.led[j] = NULL;
1479 if (!led)
1480 continue;
1481 led_classdev_unregister(led);
1482 kfree(led);
1483 }
1484 }
1485 #endif
1486 hid_hw_stop(hid);
1487 drv_data->device_props = NULL;
1488
1489 kfree(entry);
1490 out:
1491 dbg_hid("Device successfully unregistered\n");
1492 return 0;
1493 }
Linux with added FPC-III support