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sched: Remove double_rq_lock() from __migrate_task()
[linux/fpc-iii.git] / drivers / hid / hid-lg4ff.c
blobcc2bd20221989aa0284269cce533c28ab2e7295c
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-ids.h"
34
35 #define DFGT_REV_MAJ 0x13
36 #define DFGT_REV_MIN 0x22
37 #define DFGT2_REV_MIN 0x26
38 #define DFP_REV_MAJ 0x11
39 #define DFP_REV_MIN 0x06
40 #define FFEX_REV_MAJ 0x21
41 #define FFEX_REV_MIN 0x00
42 #define G25_REV_MAJ 0x12
43 #define G25_REV_MIN 0x22
44 #define G27_REV_MAJ 0x12
45 #define G27_REV_MIN 0x38
46 #define G27_2_REV_MIN 0x39
47
48 #define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
49
50 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
51 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
52 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
53 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
54
55 static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IROTH, lg4ff_range_show, lg4ff_range_store);
56
57 struct lg4ff_device_entry {
58 __u32 product_id;
59 __u16 range;
60 __u16 min_range;
61 __u16 max_range;
62 #ifdef CONFIG_LEDS_CLASS
63 __u8 led_state;
64 struct led_classdev *led[5];
65 #endif
66 struct list_head list;
67 void (*set_range)(struct hid_device *hid, u16 range);
68 };
69
70 static const signed short lg4ff_wheel_effects[] = {
71 FF_CONSTANT,
72 FF_AUTOCENTER,
73 -1
74 };
75
76 struct lg4ff_wheel {
77 const __u32 product_id;
78 const signed short *ff_effects;
79 const __u16 min_range;
80 const __u16 max_range;
81 void (*set_range)(struct hid_device *hid, u16 range);
82 };
83
84 static const struct lg4ff_wheel lg4ff_devices[] = {
85 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
86 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
87 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
88 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
89 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
90 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
91 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
92 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
93 };
94
95 struct lg4ff_native_cmd {
96 const __u8 cmd_num; /* Number of commands to send */
97 const __u8 cmd[];
98 };
99
100 struct lg4ff_usb_revision {
101 const __u16 rev_maj;
102 const __u16 rev_min;
103 const struct lg4ff_native_cmd *command;
104 };
105
106 static const struct lg4ff_native_cmd native_dfp = {
107 1,
108 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
109 };
110
111 static const struct lg4ff_native_cmd native_dfgt = {
112 2,
113 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
114 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
115 };
116
117 static const struct lg4ff_native_cmd native_g25 = {
118 1,
119 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
120 };
121
122 static const struct lg4ff_native_cmd native_g27 = {
123 2,
124 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
125 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
126 };
127
128 static const struct lg4ff_usb_revision lg4ff_revs[] = {
129 {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
130 {DFGT_REV_MAJ, DFGT2_REV_MIN, &native_dfgt}, /* Driving Force GT v2 */
131 {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
132 {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
133 {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
134 {G27_REV_MAJ, G27_2_REV_MIN, &native_g27}, /* G27 v2 */
135 };
136
137 /* Recalculates X axis value accordingly to currently selected range */
138 static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
139 {
140 __u16 max_range;
141 __s32 new_value;
142
143 if (range == 900)
144 return value;
145 else if (range == 200)
146 return value;
147 else if (range < 200)
148 max_range = 200;
149 else
150 max_range = 900;
151
152 new_value = 8192 + mult_frac(value - 8192, max_range, range);
153 if (new_value < 0)
154 return 0;
155 else if (new_value > 16383)
156 return 16383;
157 else
158 return new_value;
159 }
160
161 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
162 struct hid_usage *usage, __s32 value, struct lg_drv_data *drv_data)
163 {
164 struct lg4ff_device_entry *entry = drv_data->device_props;
165 __s32 new_value = 0;
166
167 if (!entry) {
168 hid_err(hid, "Device properties not found");
169 return 0;
170 }
171
172 switch (entry->product_id) {
173 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
174 switch (usage->code) {
175 case ABS_X:
176 new_value = lg4ff_adjust_dfp_x_axis(value, entry->range);
177 input_event(field->hidinput->input, usage->type, usage->code, new_value);
178 return 1;
179 default:
180 return 0;
181 }
182 default:
183 return 0;
184 }
185 }
186
187 static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
188 {
189 struct hid_device *hid = input_get_drvdata(dev);
190 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
191 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
192 __s32 *value = report->field[0]->value;
193 int x;
194
195 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
196
197 switch (effect->type) {
198 case FF_CONSTANT:
199 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
200 CLAMP(x);
201
202 if (x == 0x80) {
203 /* De-activate force in slot-1*/
204 value[0] = 0x13;
205 value[1] = 0x00;
206 value[2] = 0x00;
207 value[3] = 0x00;
208 value[4] = 0x00;
209 value[5] = 0x00;
210 value[6] = 0x00;
211
212 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
213 return 0;
214 }
215
216 value[0] = 0x11; /* Slot 1 */
217 value[1] = 0x08;
218 value[2] = x;
219 value[3] = 0x80;
220 value[4] = 0x00;
221 value[5] = 0x00;
222 value[6] = 0x00;
223
224 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
225 break;
226 }
227 return 0;
228 }
229
230 /* Sends default autocentering command compatible with
231 * all wheels except Formula Force EX */
232 static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
233 {
234 struct hid_device *hid = input_get_drvdata(dev);
235 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
236 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
237 __s32 *value = report->field[0]->value;
238 __u32 expand_a, expand_b;
239 struct lg4ff_device_entry *entry;
240 struct lg_drv_data *drv_data;
241
242 drv_data = hid_get_drvdata(hid);
243 if (!drv_data) {
244 hid_err(hid, "Private driver data not found!\n");
245 return;
246 }
247
248 entry = drv_data->device_props;
249 if (!entry) {
250 hid_err(hid, "Device properties not found!\n");
251 return;
252 }
253
254 /* De-activate Auto-Center */
255 if (magnitude == 0) {
256 value[0] = 0xf5;
257 value[1] = 0x00;
258 value[2] = 0x00;
259 value[3] = 0x00;
260 value[4] = 0x00;
261 value[5] = 0x00;
262 value[6] = 0x00;
263
264 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
265 return;
266 }
267
268 if (magnitude <= 0xaaaa) {
269 expand_a = 0x0c * magnitude;
270 expand_b = 0x80 * magnitude;
271 } else {
272 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
273 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
274 }
275
276 /* Adjust for non-MOMO wheels */
277 switch (entry->product_id) {
278 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
279 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
280 break;
281 default:
282 expand_a = expand_a >> 1;
283 break;
284 }
285
286 value[0] = 0xfe;
287 value[1] = 0x0d;
288 value[2] = expand_a / 0xaaaa;
289 value[3] = expand_a / 0xaaaa;
290 value[4] = expand_b / 0xaaaa;
291 value[5] = 0x00;
292 value[6] = 0x00;
293
294 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
295
296 /* Activate Auto-Center */
297 value[0] = 0x14;
298 value[1] = 0x00;
299 value[2] = 0x00;
300 value[3] = 0x00;
301 value[4] = 0x00;
302 value[5] = 0x00;
303 value[6] = 0x00;
304
305 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
306 }
307
308 /* Sends autocentering command compatible with Formula Force EX */
309 static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
310 {
311 struct hid_device *hid = input_get_drvdata(dev);
312 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
313 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
314 __s32 *value = report->field[0]->value;
315 magnitude = magnitude * 90 / 65535;
316
317 value[0] = 0xfe;
318 value[1] = 0x03;
319 value[2] = magnitude >> 14;
320 value[3] = magnitude >> 14;
321 value[4] = magnitude;
322 value[5] = 0x00;
323 value[6] = 0x00;
324
325 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
326 }
327
328 /* Sends command to set range compatible with G25/G27/Driving Force GT */
329 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
330 {
331 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
332 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
333 __s32 *value = report->field[0]->value;
334
335 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
336
337 value[0] = 0xf8;
338 value[1] = 0x81;
339 value[2] = range & 0x00ff;
340 value[3] = (range & 0xff00) >> 8;
341 value[4] = 0x00;
342 value[5] = 0x00;
343 value[6] = 0x00;
344
345 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
346 }
347
348 /* Sends commands to set range compatible with Driving Force Pro wheel */
349 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
350 {
351 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
352 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
353 int start_left, start_right, full_range;
354 __s32 *value = report->field[0]->value;
355
356 dbg_hid("Driving Force Pro: setting range to %u\n", range);
357
358 /* Prepare "coarse" limit command */
359 value[0] = 0xf8;
360 value[1] = 0x00; /* Set later */
361 value[2] = 0x00;
362 value[3] = 0x00;
363 value[4] = 0x00;
364 value[5] = 0x00;
365 value[6] = 0x00;
366
367 if (range > 200) {
368 report->field[0]->value[1] = 0x03;
369 full_range = 900;
370 } else {
371 report->field[0]->value[1] = 0x02;
372 full_range = 200;
373 }
374 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
375
376 /* Prepare "fine" limit command */
377 value[0] = 0x81;
378 value[1] = 0x0b;
379 value[2] = 0x00;
380 value[3] = 0x00;
381 value[4] = 0x00;
382 value[5] = 0x00;
383 value[6] = 0x00;
384
385 if (range == 200 || range == 900) { /* Do not apply any fine limit */
386 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
387 return;
388 }
389
390 /* Construct fine limit command */
391 start_left = (((full_range - range + 1) * 2047) / full_range);
392 start_right = 0xfff - start_left;
393
394 value[2] = start_left >> 4;
395 value[3] = start_right >> 4;
396 value[4] = 0xff;
397 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
398 value[6] = 0xff;
399
400 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
401 }
402
403 static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
404 {
405 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
406 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
407 __u8 i, j;
408
409 j = 0;
410 while (j < 7*cmd->cmd_num) {
411 for (i = 0; i < 7; i++)
412 report->field[0]->value[i] = cmd->cmd[j++];
413
414 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
415 }
416 }
417
418 /* Read current range and display it in terminal */
419 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
420 {
421 struct hid_device *hid = to_hid_device(dev);
422 struct lg4ff_device_entry *entry;
423 struct lg_drv_data *drv_data;
424 size_t count;
425
426 drv_data = hid_get_drvdata(hid);
427 if (!drv_data) {
428 hid_err(hid, "Private driver data not found!\n");
429 return 0;
430 }
431
432 entry = drv_data->device_props;
433 if (!entry) {
434 hid_err(hid, "Device properties not found!\n");
435 return 0;
436 }
437
438 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
439 return count;
440 }
441
442 /* Set range to user specified value, call appropriate function
443 * according to the type of the wheel */
444 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
445 {
446 struct hid_device *hid = to_hid_device(dev);
447 struct lg4ff_device_entry *entry;
448 struct lg_drv_data *drv_data;
449 __u16 range = simple_strtoul(buf, NULL, 10);
450
451 drv_data = hid_get_drvdata(hid);
452 if (!drv_data) {
453 hid_err(hid, "Private driver data not found!\n");
454 return 0;
455 }
456
457 entry = drv_data->device_props;
458 if (!entry) {
459 hid_err(hid, "Device properties not found!\n");
460 return 0;
461 }
462
463 if (range == 0)
464 range = entry->max_range;
465
466 /* Check if the wheel supports range setting
467 * and that the range is within limits for the wheel */
468 if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
469 entry->set_range(hid, range);
470 entry->range = range;
471 }
472
473 return count;
474 }
475
476 #ifdef CONFIG_LEDS_CLASS
477 static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
478 {
479 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
480 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
481 __s32 *value = report->field[0]->value;
482
483 value[0] = 0xf8;
484 value[1] = 0x12;
485 value[2] = leds;
486 value[3] = 0x00;
487 value[4] = 0x00;
488 value[5] = 0x00;
489 value[6] = 0x00;
490 hid_hw_request(hid, report, HID_REQ_SET_REPORT);
491 }
492
493 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
494 enum led_brightness value)
495 {
496 struct device *dev = led_cdev->dev->parent;
497 struct hid_device *hid = container_of(dev, struct hid_device, dev);
498 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
499 struct lg4ff_device_entry *entry;
500 int i, state = 0;
501
502 if (!drv_data) {
503 hid_err(hid, "Device data not found.");
504 return;
505 }
506
507 entry = (struct lg4ff_device_entry *)drv_data->device_props;
508
509 if (!entry) {
510 hid_err(hid, "Device properties not found.");
511 return;
512 }
513
514 for (i = 0; i < 5; i++) {
515 if (led_cdev != entry->led[i])
516 continue;
517 state = (entry->led_state >> i) & 1;
518 if (value == LED_OFF && state) {
519 entry->led_state &= ~(1 << i);
520 lg4ff_set_leds(hid, entry->led_state);
521 } else if (value != LED_OFF && !state) {
522 entry->led_state |= 1 << i;
523 lg4ff_set_leds(hid, entry->led_state);
524 }
525 break;
526 }
527 }
528
529 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
530 {
531 struct device *dev = led_cdev->dev->parent;
532 struct hid_device *hid = container_of(dev, struct hid_device, dev);
533 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
534 struct lg4ff_device_entry *entry;
535 int i, value = 0;
536
537 if (!drv_data) {
538 hid_err(hid, "Device data not found.");
539 return LED_OFF;
540 }
541
542 entry = (struct lg4ff_device_entry *)drv_data->device_props;
543
544 if (!entry) {
545 hid_err(hid, "Device properties not found.");
546 return LED_OFF;
547 }
548
549 for (i = 0; i < 5; i++)
550 if (led_cdev == entry->led[i]) {
551 value = (entry->led_state >> i) & 1;
552 break;
553 }
554
555 return value ? LED_FULL : LED_OFF;
556 }
557 #endif
558
559 int lg4ff_init(struct hid_device *hid)
560 {
561 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
562 struct input_dev *dev = hidinput->input;
563 struct lg4ff_device_entry *entry;
564 struct lg_drv_data *drv_data;
565 struct usb_device_descriptor *udesc;
566 int error, i, j;
567 __u16 bcdDevice, rev_maj, rev_min;
568
569 /* Check that the report looks ok */
570 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
571 return -1;
572
573 /* Check what wheel has been connected */
574 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
575 if (hid->product == lg4ff_devices[i].product_id) {
576 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
577 break;
578 }
579 }
580
581 if (i == ARRAY_SIZE(lg4ff_devices)) {
582 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
583 "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
584 return -1;
585 }
586
587 /* Attempt to switch wheel to native mode when applicable */
588 udesc = &(hid_to_usb_dev(hid)->descriptor);
589 if (!udesc) {
590 hid_err(hid, "NULL USB device descriptor\n");
591 return -1;
592 }
593 bcdDevice = le16_to_cpu(udesc->bcdDevice);
594 rev_maj = bcdDevice >> 8;
595 rev_min = bcdDevice & 0xff;
596
597 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
598 dbg_hid("Generic wheel detected, can it do native?\n");
599 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
600
601 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
602 if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
603 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
604 hid_info(hid, "Switched to native mode\n");
605 }
606 }
607 }
608
609 /* Set supported force feedback capabilities */
610 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
611 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
612
613 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
614
615 if (error)
616 return error;
617
618 /* Get private driver data */
619 drv_data = hid_get_drvdata(hid);
620 if (!drv_data) {
621 hid_err(hid, "Cannot add device, private driver data not allocated\n");
622 return -1;
623 }
624
625 /* Initialize device properties */
626 entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
627 if (!entry) {
628 hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
629 return -ENOMEM;
630 }
631 drv_data->device_props = entry;
632
633 entry->product_id = lg4ff_devices[i].product_id;
634 entry->min_range = lg4ff_devices[i].min_range;
635 entry->max_range = lg4ff_devices[i].max_range;
636 entry->set_range = lg4ff_devices[i].set_range;
637
638 /* Check if autocentering is available and
639 * set the centering force to zero by default */
640 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
641 if (rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
642 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
643 else
644 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
645
646 dev->ff->set_autocenter(dev, 0);
647 }
648
649 /* Create sysfs interface */
650 error = device_create_file(&hid->dev, &dev_attr_range);
651 if (error)
652 return error;
653 dbg_hid("sysfs interface created\n");
654
655 /* Set the maximum range to start with */
656 entry->range = entry->max_range;
657 if (entry->set_range != NULL)
658 entry->set_range(hid, entry->range);
659
660 #ifdef CONFIG_LEDS_CLASS
661 /* register led subsystem - G27 only */
662 entry->led_state = 0;
663 for (j = 0; j < 5; j++)
664 entry->led[j] = NULL;
665
666 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
667 struct led_classdev *led;
668 size_t name_sz;
669 char *name;
670
671 lg4ff_set_leds(hid, 0);
672
673 name_sz = strlen(dev_name(&hid->dev)) + 8;
674
675 for (j = 0; j < 5; j++) {
676 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
677 if (!led) {
678 hid_err(hid, "can't allocate memory for LED %d\n", j);
679 goto err;
680 }
681
682 name = (void *)(&led[1]);
683 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
684 led->name = name;
685 led->brightness = 0;
686 led->max_brightness = 1;
687 led->brightness_get = lg4ff_led_get_brightness;
688 led->brightness_set = lg4ff_led_set_brightness;
689
690 entry->led[j] = led;
691 error = led_classdev_register(&hid->dev, led);
692
693 if (error) {
694 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
695 err:
696 /* Deregister LEDs (if any) */
697 for (j = 0; j < 5; j++) {
698 led = entry->led[j];
699 entry->led[j] = NULL;
700 if (!led)
701 continue;
702 led_classdev_unregister(led);
703 kfree(led);
704 }
705 goto out; /* Let the driver continue without LEDs */
706 }
707 }
708 }
709 out:
710 #endif
711 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
712 return 0;
713 }
714
715
716
717 int lg4ff_deinit(struct hid_device *hid)
718 {
719 struct lg4ff_device_entry *entry;
720 struct lg_drv_data *drv_data;
721
722 device_remove_file(&hid->dev, &dev_attr_range);
723
724 drv_data = hid_get_drvdata(hid);
725 if (!drv_data) {
726 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
727 return -1;
728 }
729 entry = drv_data->device_props;
730 if (!entry) {
731 hid_err(hid, "Error while deinitializing device, no device properties data.\n");
732 return -1;
733 }
734
735 #ifdef CONFIG_LEDS_CLASS
736 {
737 int j;
738 struct led_classdev *led;
739
740 /* Deregister LEDs (if any) */
741 for (j = 0; j < 5; j++) {
742
743 led = entry->led[j];
744 entry->led[j] = NULL;
745 if (!led)
746 continue;
747 led_classdev_unregister(led);
748 kfree(led);
749 }
750 }
751 #endif
752
753 /* Deallocate memory */
754 kfree(entry);
755
756 dbg_hid("Device successfully unregistered\n");
757 return 0;
758 }
Linux with added FPC-III support