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HID: hid-lg4ff: Add support for G27 LEDs
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / hid / hid-lg4ff.c
CommitLineData
32c88cbc
SW		 1/*
2 * Force feedback support for Logitech Speed Force Wireless
3 *
4 * http://wiibrew.org/wiki/Logitech_USB_steering_wheel
5 *
6 * Copyright (c) 2010 Simon Wood <simon@mungewell.org>
7 */
8
9/*
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25
26#include <linux/input.h>
27#include <linux/usb.h>
28#include <linux/hid.h>
29
30#include "usbhid/usbhid.h"
31#include "hid-lg.h"
7362cd22 32#include "hid-ids.h"
32c88cbc 33
96440c8a
MM		 34#define DFGT_REV_MAJ 0x13
35#define DFGT_REV_MIN 0x22
36#define DFP_REV_MAJ 0x11
37#define DFP_REV_MIN 0x06
38#define FFEX_REV_MAJ 0x21
39#define FFEX_REV_MIN 0x00
40#define G25_REV_MAJ 0x12
41#define G25_REV_MIN 0x22
42#define G27_REV_MAJ 0x12
43#define G27_REV_MIN 0x38
44
30bb75d7
MM		 45#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
46
47static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
48static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
49static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
50static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
51
52static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
53
30bb75d7 54struct lg4ff_device_entry {
30bb75d7
MM		 55 __u16 range;
56 __u16 min_range;
57 __u16 max_range;
22bcefdc
SW		 58#ifdef CONFIG_LEDS_CLASS
59 __u8 led_state;
60 struct led_classdev *led[5];
61#endif
30bb75d7
MM		 62 struct list_head list;
63 void (*set_range)(struct hid_device *hid, u16 range);
64};
65
7362cd22 66static const signed short lg4ff_wheel_effects[] = {
32c88cbc
SW		 67 FF_CONSTANT,
68 FF_AUTOCENTER,
69 -1
70};
71
7362cd22
MM		 72struct lg4ff_wheel {
73 const __u32 product_id;
74 const signed short *ff_effects;
75 const __u16 min_range;
76 const __u16 max_range;
30bb75d7 77 void (*set_range)(struct hid_device *hid, u16 range);
7362cd22
MM		 78};
79
80static const struct lg4ff_wheel lg4ff_devices[] = {
30bb75d7
MM		 81 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
82 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
83 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
84 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
85 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
86 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
87 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
88 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
7362cd22
MM		 89};
90
96440c8a
MM		 91struct lg4ff_native_cmd {
92 const __u8 cmd_num; /* Number of commands to send */
93 const __u8 cmd[];
94};
95
96struct lg4ff_usb_revision {
97 const __u16 rev_maj;
98 const __u16 rev_min;
99 const struct lg4ff_native_cmd *command;
100};
101
102static const struct lg4ff_native_cmd native_dfp = {
103 1,
104 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
105};
106
107static const struct lg4ff_native_cmd native_dfgt = {
108 2,
109 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
110 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
111};
112
113static const struct lg4ff_native_cmd native_g25 = {
114 1,
115 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
116};
117
118static const struct lg4ff_native_cmd native_g27 = {
119 2,
120 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
121 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
122};
123
124static const struct lg4ff_usb_revision lg4ff_revs[] = {
125 {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
126 {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
127 {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
128 {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
129};
130
30bb75d7 131static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
32c88cbc
SW		 132{
133 struct hid_device *hid = input_get_drvdata(dev);
134 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
135 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
136 int x;
137
138#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
139
140 switch (effect->type) {
141 case FF_CONSTANT:
142 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
143 CLAMP(x);
144 report->field[0]->value[0] = 0x11; /* Slot 1 */
7362cd22 145 report->field[0]->value[1] = 0x08;
32c88cbc 146 report->field[0]->value[2] = x;
7362cd22 147 report->field[0]->value[3] = 0x80;
32c88cbc 148 report->field[0]->value[4] = 0x00;
7362cd22 149 report->field[0]->value[5] = 0x00;
32c88cbc 150 report->field[0]->value[6] = 0x00;
32c88cbc
SW		 151
152 usbhid_submit_report(hid, report, USB_DIR_OUT);
153 break;
154 }
155 return 0;
156}
157
6e2de8e0
MM		 158/* Sends default autocentering command compatible with
159 * all wheels except Formula Force EX */
160static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
32c88cbc
SW		 161{
162 struct hid_device *hid = input_get_drvdata(dev);
163 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
164 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
32c88cbc 165
7362cd22
MM		 166 report->field[0]->value[0] = 0xfe;
167 report->field[0]->value[1] = 0x0d;
168 report->field[0]->value[2] = magnitude >> 13;
169 report->field[0]->value[3] = magnitude >> 13;
170 report->field[0]->value[4] = magnitude >> 8;
171 report->field[0]->value[5] = 0x00;
172 report->field[0]->value[6] = 0x00;
32c88cbc
SW		 173
174 usbhid_submit_report(hid, report, USB_DIR_OUT);
175}
176
6e2de8e0
MM		 177/* Sends autocentering command compatible with Formula Force EX */
178static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
179{
180 struct hid_device *hid = input_get_drvdata(dev);
181 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
182 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
183 magnitude = magnitude * 90 / 65535;
184
185
186 report->field[0]->value[0] = 0xfe;
187 report->field[0]->value[1] = 0x03;
188 report->field[0]->value[2] = magnitude >> 14;
189 report->field[0]->value[3] = magnitude >> 14;
190 report->field[0]->value[4] = magnitude;
191 report->field[0]->value[5] = 0x00;
192 report->field[0]->value[6] = 0x00;
193
194 usbhid_submit_report(hid, report, USB_DIR_OUT);
195}
196
30bb75d7
MM		 197/* Sends command to set range compatible with G25/G27/Driving Force GT */
198static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
199{
200 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
201 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
202 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
203
204 report->field[0]->value[0] = 0xf8;
205 report->field[0]->value[1] = 0x81;
206 report->field[0]->value[2] = range & 0x00ff;
207 report->field[0]->value[3] = (range & 0xff00) >> 8;
208 report->field[0]->value[4] = 0x00;
209 report->field[0]->value[5] = 0x00;
210 report->field[0]->value[6] = 0x00;
211
212 usbhid_submit_report(hid, report, USB_DIR_OUT);
213}
214
215/* Sends commands to set range compatible with Driving Force Pro wheel */
216static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
217{
218 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
219 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
220 int start_left, start_right, full_range;
221 dbg_hid("Driving Force Pro: setting range to %u\n", range);
222
223 /* Prepare "coarse" limit command */
224 report->field[0]->value[0] = 0xf8;
225 report->field[0]->value[1] = 0x00; /* Set later */
226 report->field[0]->value[2] = 0x00;
227 report->field[0]->value[3] = 0x00;
228 report->field[0]->value[4] = 0x00;
229 report->field[0]->value[5] = 0x00;
230 report->field[0]->value[6] = 0x00;
231
232 if (range > 200) {
233 report->field[0]->value[1] = 0x03;
234 full_range = 900;
235 } else {
236 report->field[0]->value[1] = 0x02;
237 full_range = 200;
238 }
239 usbhid_submit_report(hid, report, USB_DIR_OUT);
240
241 /* Prepare "fine" limit command */
242 report->field[0]->value[0] = 0x81;
243 report->field[0]->value[1] = 0x0b;
244 report->field[0]->value[2] = 0x00;
245 report->field[0]->value[3] = 0x00;
246 report->field[0]->value[4] = 0x00;
247 report->field[0]->value[5] = 0x00;
248 report->field[0]->value[6] = 0x00;
249
250 if (range == 200 || range == 900) { /* Do not apply any fine limit */
251 usbhid_submit_report(hid, report, USB_DIR_OUT);
252 return;
253 }
254
255 /* Construct fine limit command */
256 start_left = (((full_range - range + 1) * 2047) / full_range);
257 start_right = 0xfff - start_left;
258
259 report->field[0]->value[2] = start_left >> 4;
260 report->field[0]->value[3] = start_right >> 4;
261 report->field[0]->value[4] = 0xff;
262 report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
263 report->field[0]->value[6] = 0xff;
264
265 usbhid_submit_report(hid, report, USB_DIR_OUT);
266}
267
96440c8a
MM		 268static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
269{
270 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
271 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
272 __u8 i, j;
273
274 j = 0;
275 while (j < 7*cmd->cmd_num) {
276 for (i = 0; i < 7; i++)
277 report->field[0]->value[i] = cmd->cmd[j++];
278
279 usbhid_submit_report(hid, report, USB_DIR_OUT);
280 }
281}
32c88cbc 282
30bb75d7
MM		 283/* Read current range and display it in terminal */
284static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
285{
30bb75d7 286 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 287 struct lg4ff_device_entry *entry;
288 struct lg_drv_data *drv_data;
30bb75d7
MM		 289 size_t count;
290
3b6b17b7
MM		 291 drv_data = hid_get_drvdata(hid);
292 if (!drv_data) {
293 hid_err(hid, "Private driver data not found!\n");
294 return 0;
30bb75d7 295 }
3b6b17b7
MM		 296
297 entry = drv_data->device_props;
298 if (!entry) {
299 hid_err(hid, "Device properties not found!\n");
30bb75d7
MM		 300 return 0;
301 }
302
303 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
304 return count;
305}
306
307/* Set range to user specified value, call appropriate function
308 * according to the type of the wheel */
309static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
310{
30bb75d7 311 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 312 struct lg4ff_device_entry *entry;
313 struct lg_drv_data *drv_data;
30bb75d7
MM		 314 __u16 range = simple_strtoul(buf, NULL, 10);
315
3b6b17b7
MM		 316 drv_data = hid_get_drvdata(hid);
317 if (!drv_data) {
318 hid_err(hid, "Private driver data not found!\n");
319 return 0;
30bb75d7 320 }
3b6b17b7
MM		 321
322 entry = drv_data->device_props;
323 if (!entry) {
324 hid_err(hid, "Device properties not found!\n");
325 return 0;
30bb75d7
MM		 326 }
327
328 if (range == 0)
329 range = entry->max_range;
330
331 /* Check if the wheel supports range setting
332 * and that the range is within limits for the wheel */
333 if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
334 entry->set_range(hid, range);
335 entry->range = range;
336 }
337
338 return count;
339}
340
22bcefdc
SW		 341#ifdef CONFIG_LEDS_CLASS
342static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
343{
344 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
345 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
346
347 report->field[0]->value[0] = 0xf8;
348 report->field[0]->value[1] = 0x12;
349 report->field[0]->value[2] = leds;
350 report->field[0]->value[3] = 0x00;
351 report->field[0]->value[4] = 0x00;
352 report->field[0]->value[5] = 0x00;
353 report->field[0]->value[6] = 0x00;
354 usbhid_submit_report(hid, report, USB_DIR_OUT);
355}
356
357static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
358 enum led_brightness value)
359{
360 struct device *dev = led_cdev->dev->parent;
361 struct hid_device *hid = container_of(dev, struct hid_device, dev);
362 struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
363 struct lg4ff_device_entry *entry;
364 int i, state = 0;
365
366 if (!drv_data) {
367 hid_err(hid, "Device data not found.");
368 return;
369 }
370
371 entry = (struct lg4ff_device_entry *)drv_data->device_props;
372
373 if (!entry) {
374 hid_err(hid, "Device properties not found.");
375 return;
376 }
377
378 for (i = 0; i < 5; i++) {
379 if (led_cdev != entry->led[i])
380 continue;
381 state = (entry->led_state >> i) & 1;
382 if (value == LED_OFF && state) {
383 entry->led_state &= ~(1 << i);
384 lg4ff_set_leds(hid, entry->led_state);
385 } else if (value != LED_OFF && !state) {
386 entry->led_state |= 1 << i;
387 lg4ff_set_leds(hid, entry->led_state);
388 }
389 break;
390 }
391}
392
393static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
394{
395 struct device *dev = led_cdev->dev->parent;
396 struct hid_device *hid = container_of(dev, struct hid_device, dev);
397 struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid);
398 struct lg4ff_device_entry *entry;
399 int i, value = 0;
400
401 if (!drv_data) {
402 hid_err(hid, "Device data not found.");
403 return LED_OFF;
404 }
405
406 entry = (struct lg4ff_device_entry *)drv_data->device_props;
407
408 if (!entry) {
409 hid_err(hid, "Device properties not found.");
410 return LED_OFF;
411 }
412
413 for (i = 0; i < 5; i++)
414 if (led_cdev == entry->led[i]) {
415 value = (entry->led_state >> i) & 1;
416 break;
417 }
418
419 return value ? LED_FULL : LED_OFF;
420}
421#endif
422
32c88cbc
SW		 423int lg4ff_init(struct hid_device *hid)
424{
425 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
426 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
427 struct input_dev *dev = hidinput->input;
428 struct hid_report *report;
429 struct hid_field *field;
30bb75d7 430 struct lg4ff_device_entry *entry;
3b6b17b7 431 struct lg_drv_data *drv_data;
30bb75d7 432 struct usb_device_descriptor *udesc;
7362cd22 433 int error, i, j;
96440c8a 434 __u16 bcdDevice, rev_maj, rev_min;
32c88cbc
SW		 435
436 /* Find the report to use */
437 if (list_empty(report_list)) {
4291ee30 438 hid_err(hid, "No output report found\n");
32c88cbc
SW		 439 return -1;
440 }
441
442 /* Check that the report looks ok */
443 report = list_entry(report_list->next, struct hid_report, list);
444 if (!report) {
4291ee30 445 hid_err(hid, "NULL output report\n");
32c88cbc
SW		 446 return -1;
447 }
448
449 field = report->field[0];
450 if (!field) {
4291ee30 451 hid_err(hid, "NULL field\n");
32c88cbc
SW		 452 return -1;
453 }
30bb75d7 454
7362cd22
MM		 455 /* Check what wheel has been connected */
456 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
457 if (hid->product == lg4ff_devices[i].product_id) {
458 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
459 break;
460 }
461 }
462
463 if (i == ARRAY_SIZE(lg4ff_devices)) {
464 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
465 "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
466 return -1;
467 }
32c88cbc 468
96440c8a
MM		 469 /* Attempt to switch wheel to native mode when applicable */
470 udesc = &(hid_to_usb_dev(hid)->descriptor);
471 if (!udesc) {
472 hid_err(hid, "NULL USB device descriptor\n");
473 return -1;
474 }
475 bcdDevice = le16_to_cpu(udesc->bcdDevice);
476 rev_maj = bcdDevice >> 8;
477 rev_min = bcdDevice & 0xff;
478
479 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
480 dbg_hid("Generic wheel detected, can it do native?\n");
481 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
482
483 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
484 if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
485 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
486 hid_info(hid, "Switched to native mode\n");
487 }
488 }
489 }
490
7362cd22
MM		 491 /* Set supported force feedback capabilities */
492 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
493 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
32c88cbc
SW		 494
495 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
496
497 if (error)
498 return error;
499
6e2de8e0
MM		 500 /* Check if autocentering is available and
501 * set the centering force to zero by default */
502 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
503 if(rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
504 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
505 else
506 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
507
508 dev->ff->set_autocenter(dev, 0);
509 }
32c88cbc 510
3b6b17b7
MM		 511 /* Get private driver data */
512 drv_data = hid_get_drvdata(hid);
513 if (!drv_data) {
514 hid_err(hid, "Cannot add device, private driver data not allocated\n");
515 return -1;
30bb75d7
MM		 516 }
517
3b6b17b7 518 /* Initialize device properties */
8383c6bf 519 entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
30bb75d7 520 if (!entry) {
3b6b17b7 521 hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
30bb75d7
MM		 522 return -ENOMEM;
523 }
3b6b17b7
MM		 524 drv_data->device_props = entry;
525
30bb75d7
MM		 526 entry->min_range = lg4ff_devices[i].min_range;
527 entry->max_range = lg4ff_devices[i].max_range;
528 entry->set_range = lg4ff_devices[i].set_range;
30bb75d7
MM		 529
530 /* Create sysfs interface */
531 error = device_create_file(&hid->dev, &dev_attr_range);
532 if (error)
533 return error;
534 dbg_hid("sysfs interface created\n");
535
536 /* Set the maximum range to start with */
537 entry->range = entry->max_range;
538 if (entry->set_range != NULL)
539 entry->set_range(hid, entry->range);
540
22bcefdc
SW		 541#ifdef CONFIG_LEDS_CLASS
542 /* register led subsystem - G27 only */
543 entry->led_state = 0;
544 for (j = 0; j < 5; j++)
545 entry->led[j] = NULL;
546
547 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
548 struct led_classdev *led;
549 size_t name_sz;
550 char *name;
551
552 lg4ff_set_leds(hid, 0);
553
554 name_sz = strlen(dev_name(&hid->dev)) + 8;
555
556 for (j = 0; j < 5; j++) {
557 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
558 if (!led) {
559 hid_err(hid, "can't allocate memory for LED %d\n", j);
560 goto err;
561 }
562
563 name = (void *)(&led[1]);
564 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
565 led->name = name;
566 led->brightness = 0;
567 led->max_brightness = 1;
568 led->brightness_get = lg4ff_led_get_brightness;
569 led->brightness_set = lg4ff_led_set_brightness;
570
571 entry->led[j] = led;
572 error = led_classdev_register(&hid->dev, led);
573
574 if (error) {
575 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
576err:
577 /* Deregister LEDs (if any) */
578 for (j = 0; j < 5; j++) {
579 led = entry->led[j];
580 entry->led[j] = NULL;
581 if (!led)
582 continue;
583 led_classdev_unregister(led);
584 kfree(led);
585 }
586 goto out; /* Let the driver continue without LEDs */
587 }
588 }
589 }
590#endif
591
592out:
4291ee30 593 hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\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}
kernel source for telekom puls (alcatel/mediatek)