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