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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / hid / hid-lg4ff.c
blobaf3a8ec8a746787a9702755b6ffb2f54c23a666a
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 range;
79 const u16 min_range;
80 const u16 max_range;
81 #ifdef CONFIG_LEDS_CLASS
82 u8 led_state;
83 struct led_classdev *led[5];
84 #endif
85 const u32 alternate_modes;
86 const char * const real_tag;
87 const char * const real_name;
88 const u16 real_product_id;
89
90 void (*set_range)(struct hid_device *hid, u16 range);
91 };
92
93 struct lg4ff_device_entry {
94 spinlock_t report_lock; /* Protect output HID report */
95 struct hid_report *report;
96 struct lg4ff_wheel_data wdata;
97 };
98
99 static const signed short lg4ff_wheel_effects[] = {
100 FF_CONSTANT,
101 FF_AUTOCENTER,
102 -1
103 };
104
105 struct lg4ff_wheel {
106 const u32 product_id;
107 const signed short *ff_effects;
108 const u16 min_range;
109 const u16 max_range;
110 void (*set_range)(struct hid_device *hid, u16 range);
111 };
112
113 struct lg4ff_compat_mode_switch {
114 const u8 cmd_count; /* Number of commands to send */
115 const u8 cmd[];
116 };
117
118 struct lg4ff_wheel_ident_info {
119 const u32 modes;
120 const u16 mask;
121 const u16 result;
122 const u16 real_product_id;
123 };
124
125 struct lg4ff_multimode_wheel {
126 const u16 product_id;
127 const u32 alternate_modes;
128 const char *real_tag;
129 const char *real_name;
130 };
131
132 struct lg4ff_alternate_mode {
133 const u16 product_id;
134 const char *tag;
135 const char *name;
136 };
137
138 static const struct lg4ff_wheel lg4ff_devices[] = {
139 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
140 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
141 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
142 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
143 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
144 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
145 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
146 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
147 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
148 };
149
150 static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
151 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
152 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
153 LG4FF_DFP_TAG, LG4FF_DFP_NAME},
154 {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
155 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
156 LG4FF_G25_TAG, LG4FF_G25_NAME},
157 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
158 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
159 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
160 {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
161 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
162 LG4FF_G27_TAG, LG4FF_G27_NAME},
163 {USB_DEVICE_ID_LOGITECH_G29_WHEEL,
164 LG4FF_MODE_NATIVE | LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
165 LG4FF_G29_TAG, LG4FF_G29_NAME},
166 };
167
168 static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
169 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
170 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
171 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
172 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
173 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
174 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME},
175 [LG4FF_MODE_G29_IDX] = {USB_DEVICE_ID_LOGITECH_G29_WHEEL, LG4FF_G29_TAG, LG4FF_G29_NAME},
176 };
177
178 /* Multimode wheel identificators */
179 static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
180 LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
181 0xf000,
182 0x1000,
183 USB_DEVICE_ID_LOGITECH_DFP_WHEEL
184 };
185
186 static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
187 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
188 0xff00,
189 0x1200,
190 USB_DEVICE_ID_LOGITECH_G25_WHEEL
191 };
192
193 static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
194 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
195 0xfff0,
196 0x1230,
197 USB_DEVICE_ID_LOGITECH_G27_WHEEL
198 };
199
200 static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
201 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
202 0xff00,
203 0x1300,
204 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
205 };
206
207 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info = {
208 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
209 0xfff8,
210 0x1350,
211 USB_DEVICE_ID_LOGITECH_G29_WHEEL
212 };
213
214 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info2 = {
215 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
216 0xff00,
217 0x8900,
218 USB_DEVICE_ID_LOGITECH_G29_WHEEL
219 };
220
221 /* Multimode wheel identification checklists */
222 static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = {
223 &lg4ff_g29_ident_info,
224 &lg4ff_g29_ident_info2,
225 &lg4ff_dfgt_ident_info,
226 &lg4ff_g27_ident_info,
227 &lg4ff_g25_ident_info,
228 &lg4ff_dfp_ident_info
229 };
230
231 /* Compatibility mode switching commands */
232 /* EXT_CMD9 - Understood by G27 and DFGT */
233 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
234 2,
235 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
236 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
237 };
238
239 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
240 2,
241 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
242 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
243 };
244
245 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
246 2,
247 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
248 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
249 };
250
251 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
252 2,
253 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
254 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
255 };
256
257 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
258 2,
259 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
260 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
261 };
262
263 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g29 = {
264 2,
265 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
266 0xf8, 0x09, 0x05, 0x01, 0x01, 0x00, 0x00} /* Switch mode to G29 with detach */
267 };
268
269 /* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
270 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
271 1,
272 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
273 };
274
275 /* EXT_CMD16 - Understood by G25 and G27 */
276 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
277 1,
278 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
279 };
280
281 /* Recalculates X axis value accordingly to currently selected range */
282 static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
283 {
284 u16 max_range;
285 s32 new_value;
286
287 if (range == 900)
288 return value;
289 else if (range == 200)
290 return value;
291 else if (range < 200)
292 max_range = 200;
293 else
294 max_range = 900;
295
296 new_value = 8192 + mult_frac(value - 8192, max_range, range);
297 if (new_value < 0)
298 return 0;
299 else if (new_value > 16383)
300 return 16383;
301 else
302 return new_value;
303 }
304
305 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
306 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
307 {
308 struct lg4ff_device_entry *entry = drv_data->device_props;
309 s32 new_value = 0;
310
311 if (!entry) {
312 hid_err(hid, "Device properties not found");
313 return 0;
314 }
315
316 switch (entry->wdata.product_id) {
317 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
318 switch (usage->code) {
319 case ABS_X:
320 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
321 input_event(field->hidinput->input, usage->type, usage->code, new_value);
322 return 1;
323 default:
324 return 0;
325 }
326 default:
327 return 0;
328 }
329 }
330
331 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
332 const struct lg4ff_multimode_wheel *mmode_wheel,
333 const u16 real_product_id)
334 {
335 u32 alternate_modes = 0;
336 const char *real_tag = NULL;
337 const char *real_name = NULL;
338
339 if (mmode_wheel) {
340 alternate_modes = mmode_wheel->alternate_modes;
341 real_tag = mmode_wheel->real_tag;
342 real_name = mmode_wheel->real_name;
343 }
344
345 {
346 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
347 .real_product_id = real_product_id,
348 .min_range = wheel->min_range,
349 .max_range = wheel->max_range,
350 .set_range = wheel->set_range,
351 .alternate_modes = alternate_modes,
352 .real_tag = real_tag,
353 .real_name = real_name };
354
355 memcpy(wdata, &t_wdata, sizeof(t_wdata));
356 }
357 }
358
359 static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
360 {
361 struct hid_device *hid = input_get_drvdata(dev);
362 struct lg4ff_device_entry *entry;
363 struct lg_drv_data *drv_data;
364 unsigned long flags;
365 s32 *value;
366 int x;
367
368 drv_data = hid_get_drvdata(hid);
369 if (!drv_data) {
370 hid_err(hid, "Private driver data not found!\n");
371 return -EINVAL;
372 }
373
374 entry = drv_data->device_props;
375 if (!entry) {
376 hid_err(hid, "Device properties not found!\n");
377 return -EINVAL;
378 }
379 value = entry->report->field[0]->value;
380
381 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
382
383 switch (effect->type) {
384 case FF_CONSTANT:
385 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
386 CLAMP(x);
387
388 spin_lock_irqsave(&entry->report_lock, flags);
389 if (x == 0x80) {
390 /* De-activate force in slot-1*/
391 value[0] = 0x13;
392 value[1] = 0x00;
393 value[2] = 0x00;
394 value[3] = 0x00;
395 value[4] = 0x00;
396 value[5] = 0x00;
397 value[6] = 0x00;
398
399 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
400 spin_unlock_irqrestore(&entry->report_lock, flags);
401 return 0;
402 }
403
404 value[0] = 0x11; /* Slot 1 */
405 value[1] = 0x08;
406 value[2] = x;
407 value[3] = 0x80;
408 value[4] = 0x00;
409 value[5] = 0x00;
410 value[6] = 0x00;
411
412 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
413 spin_unlock_irqrestore(&entry->report_lock, flags);
414 break;
415 }
416 return 0;
417 }
418
419 /* Sends default autocentering command compatible with
420 * all wheels except Formula Force EX */
421 static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
422 {
423 struct hid_device *hid = input_get_drvdata(dev);
424 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
425 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
426 s32 *value = report->field[0]->value;
427 u32 expand_a, expand_b;
428 struct lg4ff_device_entry *entry;
429 struct lg_drv_data *drv_data;
430 unsigned long flags;
431
432 drv_data = hid_get_drvdata(hid);
433 if (!drv_data) {
434 hid_err(hid, "Private driver data not found!\n");
435 return;
436 }
437
438 entry = drv_data->device_props;
439 if (!entry) {
440 hid_err(hid, "Device properties not found!\n");
441 return;
442 }
443 value = entry->report->field[0]->value;
444
445 /* De-activate Auto-Center */
446 spin_lock_irqsave(&entry->report_lock, flags);
447 if (magnitude == 0) {
448 value[0] = 0xf5;
449 value[1] = 0x00;
450 value[2] = 0x00;
451 value[3] = 0x00;
452 value[4] = 0x00;
453 value[5] = 0x00;
454 value[6] = 0x00;
455
456 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
457 spin_unlock_irqrestore(&entry->report_lock, flags);
458 return;
459 }
460
461 if (magnitude <= 0xaaaa) {
462 expand_a = 0x0c * magnitude;
463 expand_b = 0x80 * magnitude;
464 } else {
465 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
466 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
467 }
468
469 /* Adjust for non-MOMO wheels */
470 switch (entry->wdata.product_id) {
471 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
472 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
473 break;
474 default:
475 expand_a = expand_a >> 1;
476 break;
477 }
478
479 value[0] = 0xfe;
480 value[1] = 0x0d;
481 value[2] = expand_a / 0xaaaa;
482 value[3] = expand_a / 0xaaaa;
483 value[4] = expand_b / 0xaaaa;
484 value[5] = 0x00;
485 value[6] = 0x00;
486
487 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
488
489 /* Activate Auto-Center */
490 value[0] = 0x14;
491 value[1] = 0x00;
492 value[2] = 0x00;
493 value[3] = 0x00;
494 value[4] = 0x00;
495 value[5] = 0x00;
496 value[6] = 0x00;
497
498 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
499 spin_unlock_irqrestore(&entry->report_lock, flags);
500 }
501
502 /* Sends autocentering command compatible with Formula Force EX */
503 static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
504 {
505 struct hid_device *hid = input_get_drvdata(dev);
506 struct lg4ff_device_entry *entry;
507 struct lg_drv_data *drv_data;
508 unsigned long flags;
509 s32 *value;
510 magnitude = magnitude * 90 / 65535;
511
512 drv_data = hid_get_drvdata(hid);
513 if (!drv_data) {
514 hid_err(hid, "Private driver data not found!\n");
515 return;
516 }
517
518 entry = drv_data->device_props;
519 if (!entry) {
520 hid_err(hid, "Device properties not found!\n");
521 return;
522 }
523 value = entry->report->field[0]->value;
524
525 spin_lock_irqsave(&entry->report_lock, flags);
526 value[0] = 0xfe;
527 value[1] = 0x03;
528 value[2] = magnitude >> 14;
529 value[3] = magnitude >> 14;
530 value[4] = magnitude;
531 value[5] = 0x00;
532 value[6] = 0x00;
533
534 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
535 spin_unlock_irqrestore(&entry->report_lock, flags);
536 }
537
538 /* Sends command to set range compatible with G25/G27/Driving Force GT */
539 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
540 {
541 struct lg4ff_device_entry *entry;
542 struct lg_drv_data *drv_data;
543 unsigned long flags;
544 s32 *value;
545
546 drv_data = hid_get_drvdata(hid);
547 if (!drv_data) {
548 hid_err(hid, "Private driver data not found!\n");
549 return;
550 }
551
552 entry = drv_data->device_props;
553 if (!entry) {
554 hid_err(hid, "Device properties not found!\n");
555 return;
556 }
557 value = entry->report->field[0]->value;
558 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
559
560 spin_lock_irqsave(&entry->report_lock, flags);
561 value[0] = 0xf8;
562 value[1] = 0x81;
563 value[2] = range & 0x00ff;
564 value[3] = (range & 0xff00) >> 8;
565 value[4] = 0x00;
566 value[5] = 0x00;
567 value[6] = 0x00;
568
569 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
570 spin_unlock_irqrestore(&entry->report_lock, flags);
571 }
572
573 /* Sends commands to set range compatible with Driving Force Pro wheel */
574 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
575 {
576 struct lg4ff_device_entry *entry;
577 struct lg_drv_data *drv_data;
578 unsigned long flags;
579 int start_left, start_right, full_range;
580 s32 *value;
581
582 drv_data = hid_get_drvdata(hid);
583 if (!drv_data) {
584 hid_err(hid, "Private driver data not found!\n");
585 return;
586 }
587
588 entry = drv_data->device_props;
589 if (!entry) {
590 hid_err(hid, "Device properties not found!\n");
591 return;
592 }
593 value = entry->report->field[0]->value;
594 dbg_hid("Driving Force Pro: setting range to %u\n", range);
595
596 /* Prepare "coarse" limit command */
597 spin_lock_irqsave(&entry->report_lock, flags);
598 value[0] = 0xf8;
599 value[1] = 0x00; /* Set later */
600 value[2] = 0x00;
601 value[3] = 0x00;
602 value[4] = 0x00;
603 value[5] = 0x00;
604 value[6] = 0x00;
605
606 if (range > 200) {
607 value[1] = 0x03;
608 full_range = 900;
609 } else {
610 value[1] = 0x02;
611 full_range = 200;
612 }
613 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
614
615 /* Prepare "fine" limit command */
616 value[0] = 0x81;
617 value[1] = 0x0b;
618 value[2] = 0x00;
619 value[3] = 0x00;
620 value[4] = 0x00;
621 value[5] = 0x00;
622 value[6] = 0x00;
623
624 if (range == 200 || range == 900) { /* Do not apply any fine limit */
625 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
626 spin_unlock_irqrestore(&entry->report_lock, flags);
627 return;
628 }
629
630 /* Construct fine limit command */
631 start_left = (((full_range - range + 1) * 2047) / full_range);
632 start_right = 0xfff - start_left;
633
634 value[2] = start_left >> 4;
635 value[3] = start_right >> 4;
636 value[4] = 0xff;
637 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
638 value[6] = 0xff;
639
640 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
641 spin_unlock_irqrestore(&entry->report_lock, flags);
642 }
643
644 static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
645 {
646 switch (real_product_id) {
647 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
648 switch (target_product_id) {
649 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
650 return &lg4ff_mode_switch_ext01_dfp;
651 /* DFP can only be switched to its native mode */
652 default:
653 return NULL;
654 }
655 break;
656 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
657 switch (target_product_id) {
658 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
659 return &lg4ff_mode_switch_ext01_dfp;
660 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
661 return &lg4ff_mode_switch_ext16_g25;
662 /* G25 can only be switched to DFP mode or its native mode */
663 default:
664 return NULL;
665 }
666 break;
667 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
668 switch (target_product_id) {
669 case USB_DEVICE_ID_LOGITECH_WHEEL:
670 return &lg4ff_mode_switch_ext09_dfex;
671 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
672 return &lg4ff_mode_switch_ext09_dfp;
673 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
674 return &lg4ff_mode_switch_ext09_g25;
675 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
676 return &lg4ff_mode_switch_ext09_g27;
677 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
678 default:
679 return NULL;
680 }
681 break;
682 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
683 switch (target_product_id) {
684 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
685 return &lg4ff_mode_switch_ext09_dfp;
686 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
687 return &lg4ff_mode_switch_ext09_dfgt;
688 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
689 return &lg4ff_mode_switch_ext09_g25;
690 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
691 return &lg4ff_mode_switch_ext09_g27;
692 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
693 return &lg4ff_mode_switch_ext09_g29;
694 /* G29 can only be switched to DF-EX, DFP, DFGT, G25, G27 or its native mode */
695 default:
696 return NULL;
697 }
698 break;
699 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
700 switch (target_product_id) {
701 case USB_DEVICE_ID_LOGITECH_WHEEL:
702 return &lg4ff_mode_switch_ext09_dfex;
703 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
704 return &lg4ff_mode_switch_ext09_dfp;
705 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
706 return &lg4ff_mode_switch_ext09_dfgt;
707 /* DFGT can only be switched to DF-EX, DFP or its native mode */
708 default:
709 return NULL;
710 }
711 break;
712 /* No other wheels have multiple modes */
713 default:
714 return NULL;
715 }
716 }
717
718 static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
719 {
720 struct lg4ff_device_entry *entry;
721 struct lg_drv_data *drv_data;
722 unsigned long flags;
723 s32 *value;
724 u8 i;
725
726 drv_data = hid_get_drvdata(hid);
727 if (!drv_data) {
728 hid_err(hid, "Private driver data not found!\n");
729 return -EINVAL;
730 }
731
732 entry = drv_data->device_props;
733 if (!entry) {
734 hid_err(hid, "Device properties not found!\n");
735 return -EINVAL;
736 }
737 value = entry->report->field[0]->value;
738
739 spin_lock_irqsave(&entry->report_lock, flags);
740 for (i = 0; i < s->cmd_count; i++) {
741 u8 j;
742
743 for (j = 0; j < 7; j++)
744 value[j] = s->cmd[j + (7*i)];
745
746 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
747 }
748 spin_unlock_irqrestore(&entry->report_lock, flags);
749 hid_hw_wait(hid);
750 return 0;
751 }
752
753 static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
754 {
755 struct hid_device *hid = to_hid_device(dev);
756 struct lg4ff_device_entry *entry;
757 struct lg_drv_data *drv_data;
758 ssize_t count = 0;
759 int i;
760
761 drv_data = hid_get_drvdata(hid);
762 if (!drv_data) {
763 hid_err(hid, "Private driver data not found!\n");
764 return 0;
765 }
766
767 entry = drv_data->device_props;
768 if (!entry) {
769 hid_err(hid, "Device properties not found!\n");
770 return 0;
771 }
772
773 if (!entry->wdata.real_name) {
774 hid_err(hid, "NULL pointer to string\n");
775 return 0;
776 }
777
778 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
779 if (entry->wdata.alternate_modes & BIT(i)) {
780 /* Print tag and full name */
781 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
782 lg4ff_alternate_modes[i].tag,
783 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
784 if (count >= PAGE_SIZE - 1)
785 return count;
786
787 /* Mark the currently active mode with an asterisk */
788 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
789 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
790 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
791 else
792 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
793
794 if (count >= PAGE_SIZE - 1)
795 return count;
796 }
797 }
798
799 return count;
800 }
801
802 static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
803 {
804 struct hid_device *hid = to_hid_device(dev);
805 struct lg4ff_device_entry *entry;
806 struct lg_drv_data *drv_data;
807 const struct lg4ff_compat_mode_switch *s;
808 u16 target_product_id = 0;
809 int i, ret;
810 char *lbuf;
811
812 drv_data = hid_get_drvdata(hid);
813 if (!drv_data) {
814 hid_err(hid, "Private driver data not found!\n");
815 return -EINVAL;
816 }
817
818 entry = drv_data->device_props;
819 if (!entry) {
820 hid_err(hid, "Device properties not found!\n");
821 return -EINVAL;
822 }
823
824 /* Allow \n at the end of the input parameter */
825 lbuf = kasprintf(GFP_KERNEL, "%s", buf);
826 if (!lbuf)
827 return -ENOMEM;
828
829 i = strlen(lbuf);
830 if (lbuf[i-1] == '\n') {
831 if (i == 1) {
832 kfree(lbuf);
833 return -EINVAL;
834 }
835 lbuf[i-1] = '\0';
836 }
837
838 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
839 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
840 const char *tag = lg4ff_alternate_modes[i].tag;
841
842 if (entry->wdata.alternate_modes & BIT(i)) {
843 if (!strcmp(tag, lbuf)) {
844 if (!mode_product_id)
845 target_product_id = entry->wdata.real_product_id;
846 else
847 target_product_id = mode_product_id;
848 break;
849 }
850 }
851 }
852
853 if (i == LG4FF_MODE_MAX_IDX) {
854 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
855 kfree(lbuf);
856 return -EINVAL;
857 }
858 kfree(lbuf); /* Not needed anymore */
859
860 if (target_product_id == entry->wdata.product_id) /* Nothing to do */
861 return count;
862
863 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
864 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
865 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",
866 entry->wdata.real_name);
867 return -EINVAL;
868 }
869
870 /* Take care of hardware limitations */
871 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
872 entry->wdata.product_id > target_product_id) {
873 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
874 return -EINVAL;
875 }
876
877 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
878 if (!s) {
879 hid_err(hid, "Invalid target product ID %X\n", target_product_id);
880 return -EINVAL;
881 }
882
883 ret = lg4ff_switch_compatibility_mode(hid, s);
884 return (ret == 0 ? count : ret);
885 }
886 static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
887
888 /* Export the currently set range of the wheel */
889 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
890 char *buf)
891 {
892 struct hid_device *hid = to_hid_device(dev);
893 struct lg4ff_device_entry *entry;
894 struct lg_drv_data *drv_data;
895 size_t count;
896
897 drv_data = hid_get_drvdata(hid);
898 if (!drv_data) {
899 hid_err(hid, "Private driver data not found!\n");
900 return 0;
901 }
902
903 entry = drv_data->device_props;
904 if (!entry) {
905 hid_err(hid, "Device properties not found!\n");
906 return 0;
907 }
908
909 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
910 return count;
911 }
912
913 /* Set range to user specified value, call appropriate function
914 * according to the type of the wheel */
915 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr,
916 const char *buf, size_t count)
917 {
918 struct hid_device *hid = to_hid_device(dev);
919 struct lg4ff_device_entry *entry;
920 struct lg_drv_data *drv_data;
921 u16 range = simple_strtoul(buf, NULL, 10);
922
923 drv_data = hid_get_drvdata(hid);
924 if (!drv_data) {
925 hid_err(hid, "Private driver data not found!\n");
926 return -EINVAL;
927 }
928
929 entry = drv_data->device_props;
930 if (!entry) {
931 hid_err(hid, "Device properties not found!\n");
932 return -EINVAL;
933 }
934
935 if (range == 0)
936 range = entry->wdata.max_range;
937
938 /* Check if the wheel supports range setting
939 * and that the range is within limits for the wheel */
940 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
941 entry->wdata.set_range(hid, range);
942 entry->wdata.range = range;
943 }
944
945 return count;
946 }
947 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
948
949 static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
950 {
951 struct hid_device *hid = to_hid_device(dev);
952 struct lg4ff_device_entry *entry;
953 struct lg_drv_data *drv_data;
954 size_t count;
955
956 drv_data = hid_get_drvdata(hid);
957 if (!drv_data) {
958 hid_err(hid, "Private driver data not found!\n");
959 return 0;
960 }
961
962 entry = drv_data->device_props;
963 if (!entry) {
964 hid_err(hid, "Device properties not found!\n");
965 return 0;
966 }
967
968 if (!entry->wdata.real_tag || !entry->wdata.real_name) {
969 hid_err(hid, "NULL pointer to string\n");
970 return 0;
971 }
972
973 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
974 return count;
975 }
976
977 static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
978 {
979 /* Real ID is a read-only value */
980 return -EPERM;
981 }
982 static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
983
984 #ifdef CONFIG_LEDS_CLASS
985 static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
986 {
987 struct lg_drv_data *drv_data;
988 struct lg4ff_device_entry *entry;
989 unsigned long flags;
990 s32 *value;
991
992 drv_data = hid_get_drvdata(hid);
993 if (!drv_data) {
994 hid_err(hid, "Private driver data not found!\n");
995 return;
996 }
997
998 entry = drv_data->device_props;
999 if (!entry) {
1000 hid_err(hid, "Device properties not found!\n");
1001 return;
1002 }
1003 value = entry->report->field[0]->value;
1004
1005 spin_lock_irqsave(&entry->report_lock, flags);
1006 value[0] = 0xf8;
1007 value[1] = 0x12;
1008 value[2] = leds;
1009 value[3] = 0x00;
1010 value[4] = 0x00;
1011 value[5] = 0x00;
1012 value[6] = 0x00;
1013 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
1014 spin_unlock_irqrestore(&entry->report_lock, flags);
1015 }
1016
1017 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
1018 enum led_brightness value)
1019 {
1020 struct device *dev = led_cdev->dev->parent;
1021 struct hid_device *hid = to_hid_device(dev);
1022 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1023 struct lg4ff_device_entry *entry;
1024 int i, state = 0;
1025
1026 if (!drv_data) {
1027 hid_err(hid, "Device data not found.");
1028 return;
1029 }
1030
1031 entry = drv_data->device_props;
1032
1033 if (!entry) {
1034 hid_err(hid, "Device properties not found.");
1035 return;
1036 }
1037
1038 for (i = 0; i < 5; i++) {
1039 if (led_cdev != entry->wdata.led[i])
1040 continue;
1041 state = (entry->wdata.led_state >> i) & 1;
1042 if (value == LED_OFF && state) {
1043 entry->wdata.led_state &= ~(1 << i);
1044 lg4ff_set_leds(hid, entry->wdata.led_state);
1045 } else if (value != LED_OFF && !state) {
1046 entry->wdata.led_state |= 1 << i;
1047 lg4ff_set_leds(hid, entry->wdata.led_state);
1048 }
1049 break;
1050 }
1051 }
1052
1053 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
1054 {
1055 struct device *dev = led_cdev->dev->parent;
1056 struct hid_device *hid = to_hid_device(dev);
1057 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1058 struct lg4ff_device_entry *entry;
1059 int i, value = 0;
1060
1061 if (!drv_data) {
1062 hid_err(hid, "Device data not found.");
1063 return LED_OFF;
1064 }
1065
1066 entry = drv_data->device_props;
1067
1068 if (!entry) {
1069 hid_err(hid, "Device properties not found.");
1070 return LED_OFF;
1071 }
1072
1073 for (i = 0; i < 5; i++)
1074 if (led_cdev == entry->wdata.led[i]) {
1075 value = (entry->wdata.led_state >> i) & 1;
1076 break;
1077 }
1078
1079 return value ? LED_FULL : LED_OFF;
1080 }
1081 #endif
1082
1083 static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
1084 {
1085 u32 current_mode;
1086 int i;
1087
1088 /* identify current mode from USB PID */
1089 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) {
1090 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id);
1091 if (reported_product_id == lg4ff_alternate_modes[i].product_id)
1092 break;
1093 }
1094
1095 if (i == ARRAY_SIZE(lg4ff_alternate_modes))
1096 return 0;
1097
1098 current_mode = BIT(i);
1099
1100 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) {
1101 const u16 mask = lg4ff_main_checklist[i]->mask;
1102 const u16 result = lg4ff_main_checklist[i]->result;
1103 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id;
1104
1105 if ((current_mode & lg4ff_main_checklist[i]->modes) && \
1106 (bcdDevice & mask) == result) {
1107 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
1108 return real_product_id;
1109 }
1110 }
1111
1112 /* No match found. This is either Driving Force or an unknown
1113 * wheel model, do not touch it */
1114 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
1115 return 0;
1116 }
1117
1118 static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
1119 {
1120 const u16 reported_product_id = hid->product;
1121 int ret;
1122
1123 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
1124 /* Probed wheel is not a multimode wheel */
1125 if (!*real_product_id) {
1126 *real_product_id = reported_product_id;
1127 dbg_hid("Wheel is not a multimode wheel\n");
1128 return LG4FF_MMODE_NOT_MULTIMODE;
1129 }
1130
1131 /* Switch from "Driving Force" mode to native mode automatically.
1132 * Otherwise keep the wheel in its current mode */
1133 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
1134 reported_product_id != *real_product_id &&
1135 !lg4ff_no_autoswitch) {
1136 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
1137
1138 if (!s) {
1139 hid_err(hid, "Invalid product id %X\n", *real_product_id);
1140 return LG4FF_MMODE_NOT_MULTIMODE;
1141 }
1142
1143 ret = lg4ff_switch_compatibility_mode(hid, s);
1144 if (ret) {
1145 /* Wheel could not have been switched to native mode,
1146 * leave it in "Driving Force" mode and continue */
1147 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
1148 return LG4FF_MMODE_IS_MULTIMODE;
1149 }
1150 return LG4FF_MMODE_SWITCHED;
1151 }
1152
1153 return LG4FF_MMODE_IS_MULTIMODE;
1154 }
1155
1156
1157 int lg4ff_init(struct hid_device *hid)
1158 {
1159 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1160 struct input_dev *dev = hidinput->input;
1161 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
1162 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
1163 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1164 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
1165 const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
1166 struct lg4ff_device_entry *entry;
1167 struct lg_drv_data *drv_data;
1168 int error, i, j;
1169 int mmode_ret, mmode_idx = -1;
1170 u16 real_product_id;
1171
1172 /* Check that the report looks ok */
1173 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
1174 return -1;
1175
1176 drv_data = hid_get_drvdata(hid);
1177 if (!drv_data) {
1178 hid_err(hid, "Cannot add device, private driver data not allocated\n");
1179 return -1;
1180 }
1181 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1182 if (!entry)
1183 return -ENOMEM;
1184 spin_lock_init(&entry->report_lock);
1185 entry->report = report;
1186 drv_data->device_props = entry;
1187
1188 /* Check if a multimode wheel has been connected and
1189 * handle it appropriately */
1190 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
1191
1192 /* Wheel has been told to switch to native mode. There is no point in going on
1193 * with the initialization as the wheel will do a USB reset when it switches mode
1194 */
1195 if (mmode_ret == LG4FF_MMODE_SWITCHED)
1196 return 0;
1197 else if (mmode_ret < 0) {
1198 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
1199 error = mmode_ret;
1200 goto err_init;
1201 }
1202
1203 /* Check what wheel has been connected */
1204 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
1205 if (hid->product == lg4ff_devices[i].product_id) {
1206 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
1207 break;
1208 }
1209 }
1210
1211 if (i == ARRAY_SIZE(lg4ff_devices)) {
1212 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
1213 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
1214 "Michal Maly <madcatxster@devoid-pointer.net>\n");
1215 error = -1;
1216 goto err_init;
1217 }
1218
1219 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1220 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
1221 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
1222 break;
1223 }
1224
1225 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
1226 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
1227 error = -1;
1228 goto err_init;
1229 }
1230 }
1231
1232 /* Set supported force feedback capabilities */
1233 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
1234 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
1235
1236 error = input_ff_create_memless(dev, NULL, lg4ff_play);
1237
1238 if (error)
1239 goto err_init;
1240
1241 /* Initialize device properties */
1242 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1243 BUG_ON(mmode_idx == -1);
1244 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
1245 }
1246 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
1247
1248 /* Check if autocentering is available and
1249 * set the centering force to zero by default */
1250 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
1251 /* Formula Force EX expects different autocentering command */
1252 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
1253 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
1254 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
1255 else
1256 dev->ff->set_autocenter = lg4ff_set_autocenter_default;
1257
1258 dev->ff->set_autocenter(dev, 0);
1259 }
1260
1261 /* Create sysfs interface */
1262 error = device_create_file(&hid->dev, &dev_attr_range);
1263 if (error)
1264 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
1265 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1266 error = device_create_file(&hid->dev, &dev_attr_real_id);
1267 if (error)
1268 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
1269 error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
1270 if (error)
1271 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error);
1272 }
1273 dbg_hid("sysfs interface created\n");
1274
1275 /* Set the maximum range to start with */
1276 entry->wdata.range = entry->wdata.max_range;
1277 if (entry->wdata.set_range)
1278 entry->wdata.set_range(hid, entry->wdata.range);
1279
1280 #ifdef CONFIG_LEDS_CLASS
1281 /* register led subsystem - G27/G29 only */
1282 entry->wdata.led_state = 0;
1283 for (j = 0; j < 5; j++)
1284 entry->wdata.led[j] = NULL;
1285
1286 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL ||
1287 lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G29_WHEEL) {
1288 struct led_classdev *led;
1289 size_t name_sz;
1290 char *name;
1291
1292 lg4ff_set_leds(hid, 0);
1293
1294 name_sz = strlen(dev_name(&hid->dev)) + 8;
1295
1296 for (j = 0; j < 5; j++) {
1297 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1298 if (!led) {
1299 hid_err(hid, "can't allocate memory for LED %d\n", j);
1300 goto err_leds;
1301 }
1302
1303 name = (void *)(&led[1]);
1304 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
1305 led->name = name;
1306 led->brightness = 0;
1307 led->max_brightness = 1;
1308 led->brightness_get = lg4ff_led_get_brightness;
1309 led->brightness_set = lg4ff_led_set_brightness;
1310
1311 entry->wdata.led[j] = led;
1312 error = led_classdev_register(&hid->dev, led);
1313
1314 if (error) {
1315 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
1316 err_leds:
1317 /* Deregister LEDs (if any) */
1318 for (j = 0; j < 5; j++) {
1319 led = entry->wdata.led[j];
1320 entry->wdata.led[j] = NULL;
1321 if (!led)
1322 continue;
1323 led_classdev_unregister(led);
1324 kfree(led);
1325 }
1326 goto out; /* Let the driver continue without LEDs */
1327 }
1328 }
1329 }
1330 out:
1331 #endif
1332 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
1333 return 0;
1334
1335 err_init:
1336 drv_data->device_props = NULL;
1337 kfree(entry);
1338 return error;
1339 }
1340
1341 int lg4ff_deinit(struct hid_device *hid)
1342 {
1343 struct lg4ff_device_entry *entry;
1344 struct lg_drv_data *drv_data;
1345
1346 drv_data = hid_get_drvdata(hid);
1347 if (!drv_data) {
1348 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
1349 return -1;
1350 }
1351 entry = drv_data->device_props;
1352 if (!entry)
1353 goto out; /* Nothing more to do */
1354
1355 /* Multimode devices will have at least the "MODE_NATIVE" bit set */
1356 if (entry->wdata.alternate_modes) {
1357 device_remove_file(&hid->dev, &dev_attr_real_id);
1358 device_remove_file(&hid->dev, &dev_attr_alternate_modes);
1359 }
1360
1361 device_remove_file(&hid->dev, &dev_attr_range);
1362 #ifdef CONFIG_LEDS_CLASS
1363 {
1364 int j;
1365 struct led_classdev *led;
1366
1367 /* Deregister LEDs (if any) */
1368 for (j = 0; j < 5; j++) {
1369
1370 led = entry->wdata.led[j];
1371 entry->wdata.led[j] = NULL;
1372 if (!led)
1373 continue;
1374 led_classdev_unregister(led);
1375 kfree(led);
1376 }
1377 }
1378 #endif
1379 hid_hw_stop(hid);
1380 drv_data->device_props = NULL;
1381
1382 kfree(entry);
1383 out:
1384 dbg_hid("Device successfully unregistered\n");
1385 return 0;
1386 }
Linux with added FPC-III support