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[linux.git] / drivers / hid / hid-lg4ff.c
CommitLineData
32c88cbc 1/*
64013800 2 * Force feedback support for Logitech Gaming Wheels
32c88cbc 3 *
64013800
SW		 4 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
5 * Speed Force Wireless (WiiWheel)
32c88cbc
SW		 6 *
7 * Copyright (c) 2010 Simon Wood <[email protected]>
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"
7362cd22 33#include "hid-ids.h"
32c88cbc 34
96440c8a
MM		 35#define DFGT_REV_MAJ 0x13
36#define DFGT_REV_MIN 0x22
37#define DFP_REV_MAJ 0x11
38#define DFP_REV_MIN 0x06
39#define FFEX_REV_MAJ 0x21
40#define FFEX_REV_MIN 0x00
41#define G25_REV_MAJ 0x12
42#define G25_REV_MIN 0x22
43#define G27_REV_MAJ 0x12
44#define G27_REV_MIN 0x38
45
30bb75d7
MM		 46#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
47
48static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
49static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
50static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
51static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
52
53static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
54
30bb75d7 55struct lg4ff_device_entry {
30bb75d7
MM		 56 __u16 range;
57 __u16 min_range;
58 __u16 max_range;
22bcefdc
SW		 59#ifdef CONFIG_LEDS_CLASS
60 __u8 led_state;
61 struct led_classdev *led[5];
62#endif
30bb75d7
MM		 63 struct list_head list;
64 void (*set_range)(struct hid_device *hid, u16 range);
65};
66
7362cd22 67static const signed short lg4ff_wheel_effects[] = {
32c88cbc
SW		 68 FF_CONSTANT,
69 FF_AUTOCENTER,
70 -1
71};
72
7362cd22
MM		 73struct lg4ff_wheel {
74 const __u32 product_id;
75 const signed short *ff_effects;
76 const __u16 min_range;
77 const __u16 max_range;
30bb75d7 78 void (*set_range)(struct hid_device *hid, u16 range);
7362cd22
MM		 79};
80
81static const struct lg4ff_wheel lg4ff_devices[] = {
30bb75d7
MM		 82 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
83 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
84 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
85 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
86 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
87 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
88 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
89 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
7362cd22
MM		 90};
91
96440c8a
MM		 92struct lg4ff_native_cmd {
93 const __u8 cmd_num; /* Number of commands to send */
94 const __u8 cmd[];
95};
96
97struct lg4ff_usb_revision {
98 const __u16 rev_maj;
99 const __u16 rev_min;
100 const struct lg4ff_native_cmd *command;
101};
102
103static const struct lg4ff_native_cmd native_dfp = {
104 1,
105 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
106};
107
108static const struct lg4ff_native_cmd native_dfgt = {
109 2,
110 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
111 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
112};
113
114static const struct lg4ff_native_cmd native_g25 = {
115 1,
116 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
117};
118
119static const struct lg4ff_native_cmd native_g27 = {
120 2,
121 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
122 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
123};
124
125static const struct lg4ff_usb_revision lg4ff_revs[] = {
126 {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
127 {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
128 {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
129 {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
130};
131
30bb75d7 132static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
32c88cbc
SW		 133{
134 struct hid_device *hid = input_get_drvdata(dev);
135 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
136 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
137 int x;
138
139#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
140
141 switch (effect->type) {
142 case FF_CONSTANT:
143 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
144 CLAMP(x);
145 report->field[0]->value[0] = 0x11; /* Slot 1 */
7362cd22 146 report->field[0]->value[1] = 0x08;
32c88cbc 147 report->field[0]->value[2] = x;
7362cd22 148 report->field[0]->value[3] = 0x80;
32c88cbc 149 report->field[0]->value[4] = 0x00;
7362cd22 150 report->field[0]->value[5] = 0x00;
32c88cbc 151 report->field[0]->value[6] = 0x00;
32c88cbc
SW		 152
153 usbhid_submit_report(hid, report, USB_DIR_OUT);
154 break;
155 }
156 return 0;
157}
158
6e2de8e0
MM		 159/* Sends default autocentering command compatible with
160 * all wheels except Formula Force EX */
161static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
32c88cbc
SW		 162{
163 struct hid_device *hid = input_get_drvdata(dev);
164 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
165 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
32c88cbc 166
7362cd22
MM		 167 report->field[0]->value[0] = 0xfe;
168 report->field[0]->value[1] = 0x0d;
169 report->field[0]->value[2] = magnitude >> 13;
170 report->field[0]->value[3] = magnitude >> 13;
171 report->field[0]->value[4] = magnitude >> 8;
172 report->field[0]->value[5] = 0x00;
173 report->field[0]->value[6] = 0x00;
32c88cbc
SW		 174
175 usbhid_submit_report(hid, report, USB_DIR_OUT);
176}
177
6e2de8e0
MM		 178/* Sends autocentering command compatible with Formula Force EX */
179static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
180{
181 struct hid_device *hid = input_get_drvdata(dev);
182 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
183 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
184 magnitude = magnitude * 90 / 65535;
185
186
187 report->field[0]->value[0] = 0xfe;
188 report->field[0]->value[1] = 0x03;
189 report->field[0]->value[2] = magnitude >> 14;
190 report->field[0]->value[3] = magnitude >> 14;
191 report->field[0]->value[4] = magnitude;
192 report->field[0]->value[5] = 0x00;
193 report->field[0]->value[6] = 0x00;
194
195 usbhid_submit_report(hid, report, USB_DIR_OUT);
196}
197
30bb75d7
MM		 198/* Sends command to set range compatible with G25/G27/Driving Force GT */
199static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
200{
201 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
202 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
203 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
204
205 report->field[0]->value[0] = 0xf8;
206 report->field[0]->value[1] = 0x81;
207 report->field[0]->value[2] = range & 0x00ff;
208 report->field[0]->value[3] = (range & 0xff00) >> 8;
209 report->field[0]->value[4] = 0x00;
210 report->field[0]->value[5] = 0x00;
211 report->field[0]->value[6] = 0x00;
212
213 usbhid_submit_report(hid, report, USB_DIR_OUT);
214}
215
216/* Sends commands to set range compatible with Driving Force Pro wheel */
217static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
218{
219 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
220 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
221 int start_left, start_right, full_range;
222 dbg_hid("Driving Force Pro: setting range to %u\n", range);
223
224 /* Prepare "coarse" limit command */
225 report->field[0]->value[0] = 0xf8;
226 report->field[0]->value[1] = 0x00; /* Set later */
227 report->field[0]->value[2] = 0x00;
228 report->field[0]->value[3] = 0x00;
229 report->field[0]->value[4] = 0x00;
230 report->field[0]->value[5] = 0x00;
231 report->field[0]->value[6] = 0x00;
232
233 if (range > 200) {
234 report->field[0]->value[1] = 0x03;
235 full_range = 900;
236 } else {
237 report->field[0]->value[1] = 0x02;
238 full_range = 200;
239 }
240 usbhid_submit_report(hid, report, USB_DIR_OUT);
241
242 /* Prepare "fine" limit command */
243 report->field[0]->value[0] = 0x81;
244 report->field[0]->value[1] = 0x0b;
245 report->field[0]->value[2] = 0x00;
246 report->field[0]->value[3] = 0x00;
247 report->field[0]->value[4] = 0x00;
248 report->field[0]->value[5] = 0x00;
249 report->field[0]->value[6] = 0x00;
250
251 if (range == 200 || range == 900) { /* Do not apply any fine limit */
252 usbhid_submit_report(hid, report, USB_DIR_OUT);
253 return;
254 }
255
256 /* Construct fine limit command */
257 start_left = (((full_range - range + 1) * 2047) / full_range);
258 start_right = 0xfff - start_left;
259
260 report->field[0]->value[2] = start_left >> 4;
261 report->field[0]->value[3] = start_right >> 4;
262 report->field[0]->value[4] = 0xff;
263 report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
264 report->field[0]->value[6] = 0xff;
265
266 usbhid_submit_report(hid, report, USB_DIR_OUT);
267}
268
96440c8a
MM		 269static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
270{
271 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
272 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
273 __u8 i, j;
274
275 j = 0;
276 while (j < 7*cmd->cmd_num) {
277 for (i = 0; i < 7; i++)
278 report->field[0]->value[i] = cmd->cmd[j++];
279
280 usbhid_submit_report(hid, report, USB_DIR_OUT);
281 }
282}
32c88cbc 283
30bb75d7
MM		 284/* Read current range and display it in terminal */
285static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
286{
30bb75d7 287 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 288 struct lg4ff_device_entry *entry;
289 struct lg_drv_data *drv_data;
30bb75d7
MM		 290 size_t count;
291
3b6b17b7
MM		 292 drv_data = hid_get_drvdata(hid);
293 if (!drv_data) {
294 hid_err(hid, "Private driver data not found!\n");
295 return 0;
30bb75d7 296 }
3b6b17b7
MM		 297
298 entry = drv_data->device_props;
299 if (!entry) {
300 hid_err(hid, "Device properties not found!\n");
30bb75d7
MM		 301 return 0;
302 }
303
304 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
305 return count;
306}
307
308/* Set range to user specified value, call appropriate function
309 * according to the type of the wheel */
310static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
311{
30bb75d7 312 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 313 struct lg4ff_device_entry *entry;
314 struct lg_drv_data *drv_data;
30bb75d7
MM		 315 __u16 range = simple_strtoul(buf, NULL, 10);
316
3b6b17b7
MM		 317 drv_data = hid_get_drvdata(hid);
318 if (!drv_data) {
319 hid_err(hid, "Private driver data not found!\n");
320 return 0;
30bb75d7 321 }
3b6b17b7
MM		 322
323 entry = drv_data->device_props;
324 if (!entry) {
325 hid_err(hid, "Device properties not found!\n");
326 return 0;
30bb75d7
MM		 327 }
328
329 if (range == 0)
330 range = entry->max_range;
331
332 /* Check if the wheel supports range setting
333 * and that the range is within limits for the wheel */
334 if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
335 entry->set_range(hid, range);
336 entry->range = range;
337 }
338
339 return count;
340}
341
22bcefdc
SW		 342#ifdef CONFIG_LEDS_CLASS
343static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
344{
345 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
346 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
347
348 report->field[0]->value[0] = 0xf8;
349 report->field[0]->value[1] = 0x12;
350 report->field[0]->value[2] = leds;
351 report->field[0]->value[3] = 0x00;
352 report->field[0]->value[4] = 0x00;
353 report->field[0]->value[5] = 0x00;
354 report->field[0]->value[6] = 0x00;
355 usbhid_submit_report(hid, report, USB_DIR_OUT);
356}
357
358static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
359 enum led_brightness value)
360{
361 struct device *dev = led_cdev->dev->parent;
362 struct hid_device *hid = container_of(dev, struct hid_device, dev);
363 struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
364 struct lg4ff_device_entry *entry;
365 int i, state = 0;
366
367 if (!drv_data) {
368 hid_err(hid, "Device data not found.");
369 return;
370 }
371
372 entry = (struct lg4ff_device_entry *)drv_data->device_props;
373
374 if (!entry) {
375 hid_err(hid, "Device properties not found.");
376 return;
377 }
378
379 for (i = 0; i < 5; i++) {
380 if (led_cdev != entry->led[i])
381 continue;
382 state = (entry->led_state >> i) & 1;
383 if (value == LED_OFF && state) {
384 entry->led_state &= ~(1 << i);
385 lg4ff_set_leds(hid, entry->led_state);
386 } else if (value != LED_OFF && !state) {
387 entry->led_state |= 1 << i;
388 lg4ff_set_leds(hid, entry->led_state);
389 }
390 break;
391 }
392}
393
394static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
395{
396 struct device *dev = led_cdev->dev->parent;
397 struct hid_device *hid = container_of(dev, struct hid_device, dev);
398 struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
399 struct lg4ff_device_entry *entry;
400 int i, value = 0;
401
402 if (!drv_data) {
403 hid_err(hid, "Device data not found.");
404 return LED_OFF;
405 }
406
407 entry = (struct lg4ff_device_entry *)drv_data->device_props;
408
409 if (!entry) {
410 hid_err(hid, "Device properties not found.");
411 return LED_OFF;
412 }
413
414 for (i = 0; i < 5; i++)
415 if (led_cdev == entry->led[i]) {
416 value = (entry->led_state >> i) & 1;
417 break;
418 }
419
420 return value ? LED_FULL : LED_OFF;
421}
422#endif
423
32c88cbc
SW		 424int lg4ff_init(struct hid_device *hid)
425{
426 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
427 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
428 struct input_dev *dev = hidinput->input;
429 struct hid_report *report;
430 struct hid_field *field;
30bb75d7 431 struct lg4ff_device_entry *entry;
3b6b17b7 432 struct lg_drv_data *drv_data;
30bb75d7 433 struct usb_device_descriptor *udesc;
7362cd22 434 int error, i, j;
96440c8a 435 __u16 bcdDevice, rev_maj, rev_min;
32c88cbc
SW		 436
437 /* Find the report to use */
438 if (list_empty(report_list)) {
4291ee30 439 hid_err(hid, "No output report found\n");
32c88cbc
SW		 440 return -1;
441 }
442
443 /* Check that the report looks ok */
444 report = list_entry(report_list->next, struct hid_report, list);
445 if (!report) {
4291ee30 446 hid_err(hid, "NULL output report\n");
32c88cbc
SW		 447 return -1;
448 }
449
450 field = report->field[0];
451 if (!field) {
4291ee30 452 hid_err(hid, "NULL field\n");
32c88cbc
SW		 453 return -1;
454 }
30bb75d7 455
7362cd22
MM		 456 /* Check what wheel has been connected */
457 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
458 if (hid->product == lg4ff_devices[i].product_id) {
459 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
460 break;
461 }
462 }
463
464 if (i == ARRAY_SIZE(lg4ff_devices)) {
465 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
466 "LKML, Simon Wood <[email protected]> or Michal Maly <[email protected]>\n");
467 return -1;
468 }
32c88cbc 469
96440c8a
MM		 470 /* Attempt to switch wheel to native mode when applicable */
471 udesc = &(hid_to_usb_dev(hid)->descriptor);
472 if (!udesc) {
473 hid_err(hid, "NULL USB device descriptor\n");
474 return -1;
475 }
476 bcdDevice = le16_to_cpu(udesc->bcdDevice);
477 rev_maj = bcdDevice >> 8;
478 rev_min = bcdDevice & 0xff;
479
480 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
481 dbg_hid("Generic wheel detected, can it do native?\n");
482 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
483
484 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
485 if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
486 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
487 hid_info(hid, "Switched to native mode\n");
488 }
489 }
490 }
491
7362cd22
MM		 492 /* Set supported force feedback capabilities */
493 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
494 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
32c88cbc
SW		 495
496 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
497
498 if (error)
499 return error;
500
6e2de8e0
MM		 501 /* Check if autocentering is available and
502 * set the centering force to zero by default */
503 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
504 if(rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
505 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
506 else
507 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
508
509 dev->ff->set_autocenter(dev, 0);
510 }
32c88cbc 511
3b6b17b7
MM		 512 /* Get private driver data */
513 drv_data = hid_get_drvdata(hid);
514 if (!drv_data) {
515 hid_err(hid, "Cannot add device, private driver data not allocated\n");
516 return -1;
30bb75d7
MM		 517 }
518
3b6b17b7 519 /* Initialize device properties */
8383c6bf 520 entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
30bb75d7 521 if (!entry) {
3b6b17b7 522 hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
30bb75d7
MM		 523 return -ENOMEM;
524 }
3b6b17b7
MM		 525 drv_data->device_props = entry;
526
30bb75d7
MM		 527 entry->min_range = lg4ff_devices[i].min_range;
528 entry->max_range = lg4ff_devices[i].max_range;
529 entry->set_range = lg4ff_devices[i].set_range;
30bb75d7
MM		 530
531 /* Create sysfs interface */
532 error = device_create_file(&hid->dev, &dev_attr_range);
533 if (error)
534 return error;
535 dbg_hid("sysfs interface created\n");
536
537 /* Set the maximum range to start with */
538 entry->range = entry->max_range;
539 if (entry->set_range != NULL)
540 entry->set_range(hid, entry->range);
541
22bcefdc
SW		 542#ifdef CONFIG_LEDS_CLASS
543 /* register led subsystem - G27 only */
544 entry->led_state = 0;
545 for (j = 0; j < 5; j++)
546 entry->led[j] = NULL;
547
548 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
549 struct led_classdev *led;
550 size_t name_sz;
551 char *name;
552
553 lg4ff_set_leds(hid, 0);
554
555 name_sz = strlen(dev_name(&hid->dev)) + 8;
556
557 for (j = 0; j < 5; j++) {
558 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
559 if (!led) {
560 hid_err(hid, "can't allocate memory for LED %d\n", j);
561 goto err;
562 }
563
564 name = (void *)(&led[1]);
565 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
566 led->name = name;
567 led->brightness = 0;
568 led->max_brightness = 1;
569 led->brightness_get = lg4ff_led_get_brightness;
570 led->brightness_set = lg4ff_led_set_brightness;
571
572 entry->led[j] = led;
573 error = led_classdev_register(&hid->dev, led);
574
575 if (error) {
576 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
577err:
578 /* Deregister LEDs (if any) */
579 for (j = 0; j < 5; j++) {
580 led = entry->led[j];
581 entry->led[j] = NULL;
582 if (!led)
583 continue;
584 led_classdev_unregister(led);
585 kfree(led);
586 }
587 goto out; /* Let the driver continue without LEDs */
588 }
589 }
590 }
22bcefdc 591out:
c6e6dc87 592#endif
64013800 593 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
32c88cbc
SW		 594 return 0;
595}
596
30bb75d7
MM		 597int lg4ff_deinit(struct hid_device *hid)
598{
30bb75d7 599 struct lg4ff_device_entry *entry;
3b6b17b7
MM		 600 struct lg_drv_data *drv_data;
601
6a2e176b
MM		 602 device_remove_file(&hid->dev, &dev_attr_range);
603
3b6b17b7
MM		 604 drv_data = hid_get_drvdata(hid);
605 if (!drv_data) {
606 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
607 return -1;
30bb75d7 608 }
3b6b17b7
MM		 609 entry = drv_data->device_props;
610 if (!entry) {
611 hid_err(hid, "Error while deinitializing device, no device properties data.\n");
30bb75d7
MM		 612 return -1;
613 }
22bcefdc
SW		 614
615#ifdef CONFIG_LEDS_CLASS
616 {
617 int j;
618 struct led_classdev *led;
619
620 /* Deregister LEDs (if any) */
621 for (j = 0; j < 5; j++) {
622
623 led = entry->led[j];
624 entry->led[j] = NULL;
625 if (!led)
626 continue;
627 led_classdev_unregister(led);
628 kfree(led);
629 }
630 }
631#endif
632
3b6b17b7
MM		 633 /* Deallocate memory */
634 kfree(entry);
30bb75d7 635
30bb75d7
MM		 636 dbg_hid("Device successfully unregistered\n");
637 return 0;
638}
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