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Merge tag 'mmc-4.2-rc3' of git://git.linaro.org/people/ulf.hansson/mmc
[deliverable/linux.git] / drivers / hid / hid-lg4ff.c
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 to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
37
38 #define LG4FF_MMODE_IS_MULTIMODE 0
39 #define LG4FF_MMODE_SWITCHED 1
40 #define LG4FF_MMODE_NOT_MULTIMODE 2
41
42 #define LG4FF_MODE_NATIVE_IDX 0
43 #define LG4FF_MODE_DFEX_IDX 1
44 #define LG4FF_MODE_DFP_IDX 2
45 #define LG4FF_MODE_G25_IDX 3
46 #define LG4FF_MODE_DFGT_IDX 4
47 #define LG4FF_MODE_G27_IDX 5
48 #define LG4FF_MODE_MAX_IDX 6
49
50 #define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
51 #define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
52 #define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
53 #define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
54 #define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
55 #define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_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_DFGT_TAG "DFGT"
66 #define LG4FF_DFGT_NAME "Driving Force GT"
67
68 #define LG4FF_FFEX_REV_MAJ 0x21
69 #define LG4FF_FFEX_REV_MIN 0x00
70
71 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
72 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
73
74 struct lg4ff_wheel_data {
75 const u32 product_id;
76 u16 range;
77 const u16 min_range;
78 const u16 max_range;
79 #ifdef CONFIG_LEDS_CLASS
80 u8 led_state;
81 struct led_classdev *led[5];
82 #endif
83 const u32 alternate_modes;
84 const char * const real_tag;
85 const char * const real_name;
86 const u16 real_product_id;
87
88 void (*set_range)(struct hid_device *hid, u16 range);
89 };
90
91 struct lg4ff_device_entry {
92 spinlock_t report_lock; /* Protect output HID report */
93 struct hid_report *report;
94 struct lg4ff_wheel_data wdata;
95 };
96
97 static const signed short lg4ff_wheel_effects[] = {
98 FF_CONSTANT,
99 FF_AUTOCENTER,
100 -1
101 };
102
103 struct lg4ff_wheel {
104 const u32 product_id;
105 const signed short *ff_effects;
106 const u16 min_range;
107 const u16 max_range;
108 void (*set_range)(struct hid_device *hid, u16 range);
109 };
110
111 struct lg4ff_compat_mode_switch {
112 const u8 cmd_count; /* Number of commands to send */
113 const u8 cmd[];
114 };
115
116 struct lg4ff_wheel_ident_info {
117 const u16 mask;
118 const u16 result;
119 const u16 real_product_id;
120 };
121
122 struct lg4ff_wheel_ident_checklist {
123 const u32 count;
124 const struct lg4ff_wheel_ident_info *models[];
125 };
126
127 struct lg4ff_multimode_wheel {
128 const u16 product_id;
129 const u32 alternate_modes;
130 const char *real_tag;
131 const char *real_name;
132 };
133
134 struct lg4ff_alternate_mode {
135 const u16 product_id;
136 const char *tag;
137 const char *name;
138 };
139
140 static const struct lg4ff_wheel lg4ff_devices[] = {
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_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
148 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
149 };
150
151 static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
152 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
153 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
154 LG4FF_DFP_TAG, LG4FF_DFP_NAME},
155 {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
156 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
157 LG4FF_G25_TAG, LG4FF_G25_NAME},
158 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
159 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
160 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
161 {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
162 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
163 LG4FF_G27_TAG, LG4FF_G27_NAME},
164 };
165
166 static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
167 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
168 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
169 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
170 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
171 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
172 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME}
173 };
174
175 /* Multimode wheel identificators */
176 static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
177 0xf000,
178 0x1000,
179 USB_DEVICE_ID_LOGITECH_DFP_WHEEL
180 };
181
182 static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
183 0xff00,
184 0x1200,
185 USB_DEVICE_ID_LOGITECH_G25_WHEEL
186 };
187
188 static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
189 0xfff0,
190 0x1230,
191 USB_DEVICE_ID_LOGITECH_G27_WHEEL
192 };
193
194 static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
195 0xff00,
196 0x1300,
197 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
198 };
199
200 /* Multimode wheel identification checklists */
201 static const struct lg4ff_wheel_ident_checklist lg4ff_main_checklist = {
202 4,
203 {&lg4ff_dfgt_ident_info,
204 &lg4ff_g27_ident_info,
205 &lg4ff_g25_ident_info,
206 &lg4ff_dfp_ident_info}
207 };
208
209 /* Compatibility mode switching commands */
210 /* EXT_CMD9 - Understood by G27 and DFGT */
211 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
212 2,
213 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
214 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
215 };
216
217 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
218 2,
219 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
220 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
221 };
222
223 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
224 2,
225 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
226 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
227 };
228
229 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
230 2,
231 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
232 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
233 };
234
235 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
236 2,
237 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
238 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
239 };
240
241 /* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
242 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
243 1,
244 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
245 };
246
247 /* EXT_CMD16 - Understood by G25 and G27 */
248 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
249 1,
250 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
251 };
252
253 /* Recalculates X axis value accordingly to currently selected range */
254 static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
255 {
256 u16 max_range;
257 s32 new_value;
258
259 if (range == 900)
260 return value;
261 else if (range == 200)
262 return value;
263 else if (range < 200)
264 max_range = 200;
265 else
266 max_range = 900;
267
268 new_value = 8192 + mult_frac(value - 8192, max_range, range);
269 if (new_value < 0)
270 return 0;
271 else if (new_value > 16383)
272 return 16383;
273 else
274 return new_value;
275 }
276
277 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
278 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
279 {
280 struct lg4ff_device_entry *entry = drv_data->device_props;
281 s32 new_value = 0;
282
283 if (!entry) {
284 hid_err(hid, "Device properties not found");
285 return 0;
286 }
287
288 switch (entry->wdata.product_id) {
289 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
290 switch (usage->code) {
291 case ABS_X:
292 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
293 input_event(field->hidinput->input, usage->type, usage->code, new_value);
294 return 1;
295 default:
296 return 0;
297 }
298 default:
299 return 0;
300 }
301 }
302
303 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
304 const struct lg4ff_multimode_wheel *mmode_wheel,
305 const u16 real_product_id)
306 {
307 u32 alternate_modes = 0;
308 const char *real_tag = NULL;
309 const char *real_name = NULL;
310
311 if (mmode_wheel) {
312 alternate_modes = mmode_wheel->alternate_modes;
313 real_tag = mmode_wheel->real_tag;
314 real_name = mmode_wheel->real_name;
315 }
316
317 {
318 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
319 .real_product_id = real_product_id,
320 .min_range = wheel->min_range,
321 .max_range = wheel->max_range,
322 .set_range = wheel->set_range,
323 .alternate_modes = alternate_modes,
324 .real_tag = real_tag,
325 .real_name = real_name };
326
327 memcpy(wdata, &t_wdata, sizeof(t_wdata));
328 }
329 }
330
331 static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
332 {
333 struct hid_device *hid = input_get_drvdata(dev);
334 struct lg4ff_device_entry *entry;
335 struct lg_drv_data *drv_data;
336 unsigned long flags;
337 s32 *value;
338 int x;
339
340 drv_data = hid_get_drvdata(hid);
341 if (!drv_data) {
342 hid_err(hid, "Private driver data not found!\n");
343 return -EINVAL;
344 }
345
346 entry = drv_data->device_props;
347 if (!entry) {
348 hid_err(hid, "Device properties not found!\n");
349 return -EINVAL;
350 }
351 value = entry->report->field[0]->value;
352
353 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
354
355 switch (effect->type) {
356 case FF_CONSTANT:
357 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
358 CLAMP(x);
359
360 spin_lock_irqsave(&entry->report_lock, flags);
361 if (x == 0x80) {
362 /* De-activate force in slot-1*/
363 value[0] = 0x13;
364 value[1] = 0x00;
365 value[2] = 0x00;
366 value[3] = 0x00;
367 value[4] = 0x00;
368 value[5] = 0x00;
369 value[6] = 0x00;
370
371 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
372 spin_unlock_irqrestore(&entry->report_lock, flags);
373 return 0;
374 }
375
376 value[0] = 0x11; /* Slot 1 */
377 value[1] = 0x08;
378 value[2] = x;
379 value[3] = 0x80;
380 value[4] = 0x00;
381 value[5] = 0x00;
382 value[6] = 0x00;
383
384 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
385 spin_unlock_irqrestore(&entry->report_lock, flags);
386 break;
387 }
388 return 0;
389 }
390
391 /* Sends default autocentering command compatible with
392 * all wheels except Formula Force EX */
393 static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
394 {
395 struct hid_device *hid = input_get_drvdata(dev);
396 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
397 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
398 s32 *value = report->field[0]->value;
399 u32 expand_a, expand_b;
400 struct lg4ff_device_entry *entry;
401 struct lg_drv_data *drv_data;
402 unsigned long flags;
403
404 drv_data = hid_get_drvdata(hid);
405 if (!drv_data) {
406 hid_err(hid, "Private driver data not found!\n");
407 return;
408 }
409
410 entry = drv_data->device_props;
411 if (!entry) {
412 hid_err(hid, "Device properties not found!\n");
413 return;
414 }
415 value = entry->report->field[0]->value;
416
417 /* De-activate Auto-Center */
418 spin_lock_irqsave(&entry->report_lock, flags);
419 if (magnitude == 0) {
420 value[0] = 0xf5;
421 value[1] = 0x00;
422 value[2] = 0x00;
423 value[3] = 0x00;
424 value[4] = 0x00;
425 value[5] = 0x00;
426 value[6] = 0x00;
427
428 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
429 spin_unlock_irqrestore(&entry->report_lock, flags);
430 return;
431 }
432
433 if (magnitude <= 0xaaaa) {
434 expand_a = 0x0c * magnitude;
435 expand_b = 0x80 * magnitude;
436 } else {
437 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
438 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
439 }
440
441 /* Adjust for non-MOMO wheels */
442 switch (entry->wdata.product_id) {
443 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
444 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
445 break;
446 default:
447 expand_a = expand_a >> 1;
448 break;
449 }
450
451 value[0] = 0xfe;
452 value[1] = 0x0d;
453 value[2] = expand_a / 0xaaaa;
454 value[3] = expand_a / 0xaaaa;
455 value[4] = expand_b / 0xaaaa;
456 value[5] = 0x00;
457 value[6] = 0x00;
458
459 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
460
461 /* Activate Auto-Center */
462 value[0] = 0x14;
463 value[1] = 0x00;
464 value[2] = 0x00;
465 value[3] = 0x00;
466 value[4] = 0x00;
467 value[5] = 0x00;
468 value[6] = 0x00;
469
470 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
471 spin_unlock_irqrestore(&entry->report_lock, flags);
472 }
473
474 /* Sends autocentering command compatible with Formula Force EX */
475 static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
476 {
477 struct hid_device *hid = input_get_drvdata(dev);
478 struct lg4ff_device_entry *entry;
479 struct lg_drv_data *drv_data;
480 unsigned long flags;
481 s32 *value;
482 magnitude = magnitude * 90 / 65535;
483
484 drv_data = hid_get_drvdata(hid);
485 if (!drv_data) {
486 hid_err(hid, "Private driver data not found!\n");
487 return;
488 }
489
490 entry = drv_data->device_props;
491 if (!entry) {
492 hid_err(hid, "Device properties not found!\n");
493 return;
494 }
495 value = entry->report->field[0]->value;
496
497 spin_lock_irqsave(&entry->report_lock, flags);
498 value[0] = 0xfe;
499 value[1] = 0x03;
500 value[2] = magnitude >> 14;
501 value[3] = magnitude >> 14;
502 value[4] = magnitude;
503 value[5] = 0x00;
504 value[6] = 0x00;
505
506 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
507 spin_unlock_irqrestore(&entry->report_lock, flags);
508 }
509
510 /* Sends command to set range compatible with G25/G27/Driving Force GT */
511 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
512 {
513 struct lg4ff_device_entry *entry;
514 struct lg_drv_data *drv_data;
515 unsigned long flags;
516 s32 *value;
517
518 drv_data = hid_get_drvdata(hid);
519 if (!drv_data) {
520 hid_err(hid, "Private driver data not found!\n");
521 return;
522 }
523
524 entry = drv_data->device_props;
525 if (!entry) {
526 hid_err(hid, "Device properties not found!\n");
527 return;
528 }
529 value = entry->report->field[0]->value;
530 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
531
532 spin_lock_irqsave(&entry->report_lock, flags);
533 value[0] = 0xf8;
534 value[1] = 0x81;
535 value[2] = range & 0x00ff;
536 value[3] = (range & 0xff00) >> 8;
537 value[4] = 0x00;
538 value[5] = 0x00;
539 value[6] = 0x00;
540
541 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
542 spin_unlock_irqrestore(&entry->report_lock, flags);
543 }
544
545 /* Sends commands to set range compatible with Driving Force Pro wheel */
546 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
547 {
548 struct lg4ff_device_entry *entry;
549 struct lg_drv_data *drv_data;
550 unsigned long flags;
551 int start_left, start_right, full_range;
552 s32 *value;
553
554 drv_data = hid_get_drvdata(hid);
555 if (!drv_data) {
556 hid_err(hid, "Private driver data not found!\n");
557 return;
558 }
559
560 entry = drv_data->device_props;
561 if (!entry) {
562 hid_err(hid, "Device properties not found!\n");
563 return;
564 }
565 value = entry->report->field[0]->value;
566 dbg_hid("Driving Force Pro: setting range to %u\n", range);
567
568 /* Prepare "coarse" limit command */
569 spin_lock_irqsave(&entry->report_lock, flags);
570 value[0] = 0xf8;
571 value[1] = 0x00; /* Set later */
572 value[2] = 0x00;
573 value[3] = 0x00;
574 value[4] = 0x00;
575 value[5] = 0x00;
576 value[6] = 0x00;
577
578 if (range > 200) {
579 value[1] = 0x03;
580 full_range = 900;
581 } else {
582 value[1] = 0x02;
583 full_range = 200;
584 }
585 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
586
587 /* Prepare "fine" limit command */
588 value[0] = 0x81;
589 value[1] = 0x0b;
590 value[2] = 0x00;
591 value[3] = 0x00;
592 value[4] = 0x00;
593 value[5] = 0x00;
594 value[6] = 0x00;
595
596 if (range == 200 || range == 900) { /* Do not apply any fine limit */
597 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
598 spin_unlock_irqrestore(&entry->report_lock, flags);
599 return;
600 }
601
602 /* Construct fine limit command */
603 start_left = (((full_range - range + 1) * 2047) / full_range);
604 start_right = 0xfff - start_left;
605
606 value[2] = start_left >> 4;
607 value[3] = start_right >> 4;
608 value[4] = 0xff;
609 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
610 value[6] = 0xff;
611
612 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
613 spin_unlock_irqrestore(&entry->report_lock, flags);
614 }
615
616 static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
617 {
618 switch (real_product_id) {
619 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
620 switch (target_product_id) {
621 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
622 return &lg4ff_mode_switch_ext01_dfp;
623 /* DFP can only be switched to its native mode */
624 default:
625 return NULL;
626 }
627 break;
628 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
629 switch (target_product_id) {
630 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
631 return &lg4ff_mode_switch_ext01_dfp;
632 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
633 return &lg4ff_mode_switch_ext16_g25;
634 /* G25 can only be switched to DFP mode or its native mode */
635 default:
636 return NULL;
637 }
638 break;
639 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
640 switch (target_product_id) {
641 case USB_DEVICE_ID_LOGITECH_WHEEL:
642 return &lg4ff_mode_switch_ext09_dfex;
643 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
644 return &lg4ff_mode_switch_ext09_dfp;
645 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
646 return &lg4ff_mode_switch_ext09_g25;
647 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
648 return &lg4ff_mode_switch_ext09_g27;
649 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
650 default:
651 return NULL;
652 }
653 break;
654 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
655 switch (target_product_id) {
656 case USB_DEVICE_ID_LOGITECH_WHEEL:
657 return &lg4ff_mode_switch_ext09_dfex;
658 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
659 return &lg4ff_mode_switch_ext09_dfp;
660 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
661 return &lg4ff_mode_switch_ext09_dfgt;
662 /* DFGT can only be switched to DF-EX, DFP or its native mode */
663 default:
664 return NULL;
665 }
666 break;
667 /* No other wheels have multiple modes */
668 default:
669 return NULL;
670 }
671 }
672
673 static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
674 {
675 struct lg4ff_device_entry *entry;
676 struct lg_drv_data *drv_data;
677 unsigned long flags;
678 s32 *value;
679 u8 i;
680
681 drv_data = hid_get_drvdata(hid);
682 if (!drv_data) {
683 hid_err(hid, "Private driver data not found!\n");
684 return -EINVAL;
685 }
686
687 entry = drv_data->device_props;
688 if (!entry) {
689 hid_err(hid, "Device properties not found!\n");
690 return -EINVAL;
691 }
692 value = entry->report->field[0]->value;
693
694 spin_lock_irqsave(&entry->report_lock, flags);
695 for (i = 0; i < s->cmd_count; i++) {
696 u8 j;
697
698 for (j = 0; j < 7; j++)
699 value[j] = s->cmd[j + (7*i)];
700
701 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
702 }
703 spin_unlock_irqrestore(&entry->report_lock, flags);
704 hid_hw_wait(hid);
705 return 0;
706 }
707
708 static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
709 {
710 struct hid_device *hid = to_hid_device(dev);
711 struct lg4ff_device_entry *entry;
712 struct lg_drv_data *drv_data;
713 ssize_t count = 0;
714 int i;
715
716 drv_data = hid_get_drvdata(hid);
717 if (!drv_data) {
718 hid_err(hid, "Private driver data not found!\n");
719 return 0;
720 }
721
722 entry = drv_data->device_props;
723 if (!entry) {
724 hid_err(hid, "Device properties not found!\n");
725 return 0;
726 }
727
728 if (!entry->wdata.real_name) {
729 hid_err(hid, "NULL pointer to string\n");
730 return 0;
731 }
732
733 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
734 if (entry->wdata.alternate_modes & BIT(i)) {
735 /* Print tag and full name */
736 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
737 lg4ff_alternate_modes[i].tag,
738 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
739 if (count >= PAGE_SIZE - 1)
740 return count;
741
742 /* Mark the currently active mode with an asterisk */
743 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
744 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
745 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
746 else
747 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
748
749 if (count >= PAGE_SIZE - 1)
750 return count;
751 }
752 }
753
754 return count;
755 }
756
757 static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
758 {
759 struct hid_device *hid = to_hid_device(dev);
760 struct lg4ff_device_entry *entry;
761 struct lg_drv_data *drv_data;
762 const struct lg4ff_compat_mode_switch *s;
763 u16 target_product_id = 0;
764 int i, ret;
765 char *lbuf;
766
767 drv_data = hid_get_drvdata(hid);
768 if (!drv_data) {
769 hid_err(hid, "Private driver data not found!\n");
770 return -EINVAL;
771 }
772
773 entry = drv_data->device_props;
774 if (!entry) {
775 hid_err(hid, "Device properties not found!\n");
776 return -EINVAL;
777 }
778
779 /* Allow \n at the end of the input parameter */
780 lbuf = kasprintf(GFP_KERNEL, "%s", buf);
781 if (!lbuf)
782 return -ENOMEM;
783
784 i = strlen(lbuf);
785 if (lbuf[i-1] == '\n') {
786 if (i == 1) {
787 kfree(lbuf);
788 return -EINVAL;
789 }
790 lbuf[i-1] = '\0';
791 }
792
793 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
794 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
795 const char *tag = lg4ff_alternate_modes[i].tag;
796
797 if (entry->wdata.alternate_modes & BIT(i)) {
798 if (!strcmp(tag, lbuf)) {
799 if (!mode_product_id)
800 target_product_id = entry->wdata.real_product_id;
801 else
802 target_product_id = mode_product_id;
803 break;
804 }
805 }
806 }
807
808 if (i == LG4FF_MODE_MAX_IDX) {
809 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
810 kfree(lbuf);
811 return -EINVAL;
812 }
813 kfree(lbuf); /* Not needed anymore */
814
815 if (target_product_id == entry->wdata.product_id) /* Nothing to do */
816 return count;
817
818 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
819 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
820 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",
821 entry->wdata.real_name);
822 return -EINVAL;
823 }
824
825 /* Take care of hardware limitations */
826 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
827 entry->wdata.product_id > target_product_id) {
828 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
829 return -EINVAL;
830 }
831
832 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
833 if (!s) {
834 hid_err(hid, "Invalid target product ID %X\n", target_product_id);
835 return -EINVAL;
836 }
837
838 ret = lg4ff_switch_compatibility_mode(hid, s);
839 return (ret == 0 ? count : ret);
840 }
841 static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
842
843 /* Export the currently set range of the wheel */
844 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
845 char *buf)
846 {
847 struct hid_device *hid = to_hid_device(dev);
848 struct lg4ff_device_entry *entry;
849 struct lg_drv_data *drv_data;
850 size_t count;
851
852 drv_data = hid_get_drvdata(hid);
853 if (!drv_data) {
854 hid_err(hid, "Private driver data not found!\n");
855 return 0;
856 }
857
858 entry = drv_data->device_props;
859 if (!entry) {
860 hid_err(hid, "Device properties not found!\n");
861 return 0;
862 }
863
864 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
865 return count;
866 }
867
868 /* Set range to user specified value, call appropriate function
869 * according to the type of the wheel */
870 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr,
871 const char *buf, size_t count)
872 {
873 struct hid_device *hid = to_hid_device(dev);
874 struct lg4ff_device_entry *entry;
875 struct lg_drv_data *drv_data;
876 u16 range = simple_strtoul(buf, NULL, 10);
877
878 drv_data = hid_get_drvdata(hid);
879 if (!drv_data) {
880 hid_err(hid, "Private driver data not found!\n");
881 return -EINVAL;
882 }
883
884 entry = drv_data->device_props;
885 if (!entry) {
886 hid_err(hid, "Device properties not found!\n");
887 return -EINVAL;
888 }
889
890 if (range == 0)
891 range = entry->wdata.max_range;
892
893 /* Check if the wheel supports range setting
894 * and that the range is within limits for the wheel */
895 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
896 entry->wdata.set_range(hid, range);
897 entry->wdata.range = range;
898 }
899
900 return count;
901 }
902 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
903
904 static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
905 {
906 struct hid_device *hid = to_hid_device(dev);
907 struct lg4ff_device_entry *entry;
908 struct lg_drv_data *drv_data;
909 size_t count;
910
911 drv_data = hid_get_drvdata(hid);
912 if (!drv_data) {
913 hid_err(hid, "Private driver data not found!\n");
914 return 0;
915 }
916
917 entry = drv_data->device_props;
918 if (!entry) {
919 hid_err(hid, "Device properties not found!\n");
920 return 0;
921 }
922
923 if (!entry->wdata.real_tag || !entry->wdata.real_name) {
924 hid_err(hid, "NULL pointer to string\n");
925 return 0;
926 }
927
928 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
929 return count;
930 }
931
932 static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
933 {
934 /* Real ID is a read-only value */
935 return -EPERM;
936 }
937 static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
938
939 #ifdef CONFIG_LEDS_CLASS
940 static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
941 {
942 struct lg_drv_data *drv_data;
943 struct lg4ff_device_entry *entry;
944 unsigned long flags;
945 s32 *value;
946
947 drv_data = hid_get_drvdata(hid);
948 if (!drv_data) {
949 hid_err(hid, "Private driver data not found!\n");
950 return;
951 }
952
953 entry = drv_data->device_props;
954 if (!entry) {
955 hid_err(hid, "Device properties not found!\n");
956 return;
957 }
958 value = entry->report->field[0]->value;
959
960 spin_lock_irqsave(&entry->report_lock, flags);
961 value[0] = 0xf8;
962 value[1] = 0x12;
963 value[2] = leds;
964 value[3] = 0x00;
965 value[4] = 0x00;
966 value[5] = 0x00;
967 value[6] = 0x00;
968 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
969 spin_unlock_irqrestore(&entry->report_lock, flags);
970 }
971
972 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
973 enum led_brightness value)
974 {
975 struct device *dev = led_cdev->dev->parent;
976 struct hid_device *hid = container_of(dev, struct hid_device, dev);
977 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
978 struct lg4ff_device_entry *entry;
979 int i, state = 0;
980
981 if (!drv_data) {
982 hid_err(hid, "Device data not found.");
983 return;
984 }
985
986 entry = drv_data->device_props;
987
988 if (!entry) {
989 hid_err(hid, "Device properties not found.");
990 return;
991 }
992
993 for (i = 0; i < 5; i++) {
994 if (led_cdev != entry->wdata.led[i])
995 continue;
996 state = (entry->wdata.led_state >> i) & 1;
997 if (value == LED_OFF && state) {
998 entry->wdata.led_state &= ~(1 << i);
999 lg4ff_set_leds(hid, entry->wdata.led_state);
1000 } else if (value != LED_OFF && !state) {
1001 entry->wdata.led_state |= 1 << i;
1002 lg4ff_set_leds(hid, entry->wdata.led_state);
1003 }
1004 break;
1005 }
1006 }
1007
1008 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
1009 {
1010 struct device *dev = led_cdev->dev->parent;
1011 struct hid_device *hid = container_of(dev, struct hid_device, dev);
1012 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1013 struct lg4ff_device_entry *entry;
1014 int i, value = 0;
1015
1016 if (!drv_data) {
1017 hid_err(hid, "Device data not found.");
1018 return LED_OFF;
1019 }
1020
1021 entry = drv_data->device_props;
1022
1023 if (!entry) {
1024 hid_err(hid, "Device properties not found.");
1025 return LED_OFF;
1026 }
1027
1028 for (i = 0; i < 5; i++)
1029 if (led_cdev == entry->wdata.led[i]) {
1030 value = (entry->wdata.led_state >> i) & 1;
1031 break;
1032 }
1033
1034 return value ? LED_FULL : LED_OFF;
1035 }
1036 #endif
1037
1038 static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
1039 {
1040 const struct lg4ff_wheel_ident_checklist *checklist;
1041 int i, from_idx, to_idx;
1042
1043 switch (reported_product_id) {
1044 case USB_DEVICE_ID_LOGITECH_WHEEL:
1045 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
1046 checklist = &lg4ff_main_checklist;
1047 from_idx = 0;
1048 to_idx = checklist->count - 1;
1049 break;
1050 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
1051 checklist = &lg4ff_main_checklist;
1052 from_idx = 0;
1053 to_idx = checklist->count - 2; /* End identity check at G25 */
1054 break;
1055 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
1056 checklist = &lg4ff_main_checklist;
1057 from_idx = 1; /* Start identity check at G27 */
1058 to_idx = checklist->count - 3; /* End identity check at G27 */
1059 break;
1060 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
1061 checklist = &lg4ff_main_checklist;
1062 from_idx = 0;
1063 to_idx = checklist->count - 4; /* End identity check at DFGT */
1064 break;
1065 default:
1066 return 0;
1067 }
1068
1069 for (i = from_idx; i <= to_idx; i++) {
1070 const u16 mask = checklist->models[i]->mask;
1071 const u16 result = checklist->models[i]->result;
1072 const u16 real_product_id = checklist->models[i]->real_product_id;
1073
1074 if ((bcdDevice & mask) == result) {
1075 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
1076 return real_product_id;
1077 }
1078 }
1079
1080 /* No match found. This is either Driving Force or an unknown
1081 * wheel model, do not touch it */
1082 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
1083 return 0;
1084 }
1085
1086 static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
1087 {
1088 const u16 reported_product_id = hid->product;
1089 int ret;
1090
1091 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
1092 /* Probed wheel is not a multimode wheel */
1093 if (!*real_product_id) {
1094 *real_product_id = reported_product_id;
1095 dbg_hid("Wheel is not a multimode wheel\n");
1096 return LG4FF_MMODE_NOT_MULTIMODE;
1097 }
1098
1099 /* Switch from "Driving Force" mode to native mode automatically.
1100 * Otherwise keep the wheel in its current mode */
1101 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
1102 reported_product_id != *real_product_id &&
1103 !lg4ff_no_autoswitch) {
1104 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
1105
1106 if (!s) {
1107 hid_err(hid, "Invalid product id %X\n", *real_product_id);
1108 return LG4FF_MMODE_NOT_MULTIMODE;
1109 }
1110
1111 ret = lg4ff_switch_compatibility_mode(hid, s);
1112 if (ret) {
1113 /* Wheel could not have been switched to native mode,
1114 * leave it in "Driving Force" mode and continue */
1115 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
1116 return LG4FF_MMODE_IS_MULTIMODE;
1117 }
1118 return LG4FF_MMODE_SWITCHED;
1119 }
1120
1121 return LG4FF_MMODE_IS_MULTIMODE;
1122 }
1123
1124
1125 int lg4ff_init(struct hid_device *hid)
1126 {
1127 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1128 struct input_dev *dev = hidinput->input;
1129 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
1130 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
1131 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1132 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
1133 const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
1134 struct lg4ff_device_entry *entry;
1135 struct lg_drv_data *drv_data;
1136 int error, i, j;
1137 int mmode_ret, mmode_idx = -1;
1138 u16 real_product_id;
1139
1140 /* Check that the report looks ok */
1141 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
1142 return -1;
1143
1144 drv_data = hid_get_drvdata(hid);
1145 if (!drv_data) {
1146 hid_err(hid, "Cannot add device, private driver data not allocated\n");
1147 return -1;
1148 }
1149 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1150 if (!entry)
1151 return -ENOMEM;
1152 spin_lock_init(&entry->report_lock);
1153 entry->report = report;
1154 drv_data->device_props = entry;
1155
1156 /* Check if a multimode wheel has been connected and
1157 * handle it appropriately */
1158 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
1159
1160 /* Wheel has been told to switch to native mode. There is no point in going on
1161 * with the initialization as the wheel will do a USB reset when it switches mode
1162 */
1163 if (mmode_ret == LG4FF_MMODE_SWITCHED)
1164 return 0;
1165 else if (mmode_ret < 0) {
1166 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
1167 error = mmode_ret;
1168 goto err_init;
1169 }
1170
1171 /* Check what wheel has been connected */
1172 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
1173 if (hid->product == lg4ff_devices[i].product_id) {
1174 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
1175 break;
1176 }
1177 }
1178
1179 if (i == ARRAY_SIZE(lg4ff_devices)) {
1180 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
1181 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
1182 "Michal Maly <madcatxster@devoid-pointer.net>\n");
1183 error = -1;
1184 goto err_init;
1185 }
1186
1187 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1188 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
1189 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
1190 break;
1191 }
1192
1193 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
1194 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
1195 error = -1;
1196 goto err_init;
1197 }
1198 }
1199
1200 /* Set supported force feedback capabilities */
1201 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
1202 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
1203
1204 error = input_ff_create_memless(dev, NULL, lg4ff_play);
1205
1206 if (error)
1207 goto err_init;
1208
1209 /* Initialize device properties */
1210 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1211 BUG_ON(mmode_idx == -1);
1212 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
1213 }
1214 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
1215
1216 /* Check if autocentering is available and
1217 * set the centering force to zero by default */
1218 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
1219 /* Formula Force EX expects different autocentering command */
1220 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
1221 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
1222 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
1223 else
1224 dev->ff->set_autocenter = lg4ff_set_autocenter_default;
1225
1226 dev->ff->set_autocenter(dev, 0);
1227 }
1228
1229 /* Create sysfs interface */
1230 error = device_create_file(&hid->dev, &dev_attr_range);
1231 if (error)
1232 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
1233 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1234 error = device_create_file(&hid->dev, &dev_attr_real_id);
1235 if (error)
1236 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
1237 error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
1238 if (error)
1239 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error);
1240 }
1241 dbg_hid("sysfs interface created\n");
1242
1243 /* Set the maximum range to start with */
1244 entry->wdata.range = entry->wdata.max_range;
1245 if (entry->wdata.set_range)
1246 entry->wdata.set_range(hid, entry->wdata.range);
1247
1248 #ifdef CONFIG_LEDS_CLASS
1249 /* register led subsystem - G27 only */
1250 entry->wdata.led_state = 0;
1251 for (j = 0; j < 5; j++)
1252 entry->wdata.led[j] = NULL;
1253
1254 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
1255 struct led_classdev *led;
1256 size_t name_sz;
1257 char *name;
1258
1259 lg4ff_set_leds(hid, 0);
1260
1261 name_sz = strlen(dev_name(&hid->dev)) + 8;
1262
1263 for (j = 0; j < 5; j++) {
1264 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1265 if (!led) {
1266 hid_err(hid, "can't allocate memory for LED %d\n", j);
1267 goto err_leds;
1268 }
1269
1270 name = (void *)(&led[1]);
1271 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
1272 led->name = name;
1273 led->brightness = 0;
1274 led->max_brightness = 1;
1275 led->brightness_get = lg4ff_led_get_brightness;
1276 led->brightness_set = lg4ff_led_set_brightness;
1277
1278 entry->wdata.led[j] = led;
1279 error = led_classdev_register(&hid->dev, led);
1280
1281 if (error) {
1282 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
1283 err_leds:
1284 /* Deregister LEDs (if any) */
1285 for (j = 0; j < 5; j++) {
1286 led = entry->wdata.led[j];
1287 entry->wdata.led[j] = NULL;
1288 if (!led)
1289 continue;
1290 led_classdev_unregister(led);
1291 kfree(led);
1292 }
1293 goto out; /* Let the driver continue without LEDs */
1294 }
1295 }
1296 }
1297 out:
1298 #endif
1299 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
1300 return 0;
1301
1302 err_init:
1303 drv_data->device_props = NULL;
1304 kfree(entry);
1305 return error;
1306 }
1307
1308 int lg4ff_deinit(struct hid_device *hid)
1309 {
1310 struct lg4ff_device_entry *entry;
1311 struct lg_drv_data *drv_data;
1312
1313 drv_data = hid_get_drvdata(hid);
1314 if (!drv_data) {
1315 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
1316 return -1;
1317 }
1318 entry = drv_data->device_props;
1319 if (!entry)
1320 goto out; /* Nothing more to do */
1321
1322 /* Multimode devices will have at least the "MODE_NATIVE" bit set */
1323 if (entry->wdata.alternate_modes) {
1324 device_remove_file(&hid->dev, &dev_attr_real_id);
1325 device_remove_file(&hid->dev, &dev_attr_alternate_modes);
1326 }
1327
1328 device_remove_file(&hid->dev, &dev_attr_range);
1329 #ifdef CONFIG_LEDS_CLASS
1330 {
1331 int j;
1332 struct led_classdev *led;
1333
1334 /* Deregister LEDs (if any) */
1335 for (j = 0; j < 5; j++) {
1336
1337 led = entry->wdata.led[j];
1338 entry->wdata.led[j] = NULL;
1339 if (!led)
1340 continue;
1341 led_classdev_unregister(led);
1342 kfree(led);
1343 }
1344 }
1345 #endif
1346 hid_hw_stop(hid);
1347 drv_data->device_props = NULL;
1348
1349 kfree(entry);
1350 out:
1351 dbg_hid("Device successfully unregistered\n");
1352 return 0;
1353 }
Linux kernel - Deliverables
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