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cxgb4: parse TC-U32 key values and masks natively
[mirror_ubuntu-hirsute-kernel.git] / drivers / hid / hid-lg4ff.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
32c88cbc 2/*
64013800 3 * Force feedback support for Logitech Gaming Wheels
32c88cbc 4 *
64013800
SW		 5 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
6 * Speed Force Wireless (WiiWheel)
32c88cbc
SW		 7 *
8 * Copyright (c) 2010 Simon Wood <simon@mungewell.org>
9 */
10
11/*
32c88cbc
SW		 12 */
13
14
15#include <linux/input.h>
16#include <linux/usb.h>
17#include <linux/hid.h>
18
19#include "usbhid/usbhid.h"
20#include "hid-lg.h"
a54dc779 21#include "hid-lg4ff.h"
7362cd22 22#include "hid-ids.h"
32c88cbc 23
b96d23ec 24#define LG4FF_MMODE_IS_MULTIMODE 0
e7c23449
MM		 25#define LG4FF_MMODE_SWITCHED 1
26#define LG4FF_MMODE_NOT_MULTIMODE 2
27
b96d23ec
MM		 28#define LG4FF_MODE_NATIVE_IDX 0
29#define LG4FF_MODE_DFEX_IDX 1
30#define LG4FF_MODE_DFP_IDX 2
31#define LG4FF_MODE_G25_IDX 3
32#define LG4FF_MODE_DFGT_IDX 4
33#define LG4FF_MODE_G27_IDX 5
29fae1c8
SW		 34#define LG4FF_MODE_G29_IDX 6
35#define LG4FF_MODE_MAX_IDX 7
b96d23ec
MM		 36
37#define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
38#define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
39#define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
40#define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
41#define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
42#define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
29fae1c8 43#define LG4FF_MODE_G29 BIT(LG4FF_MODE_G29_IDX)
b96d23ec
MM		 44
45#define LG4FF_DFEX_TAG "DF-EX"
46#define LG4FF_DFEX_NAME "Driving Force / Formula EX"
47#define LG4FF_DFP_TAG "DFP"
48#define LG4FF_DFP_NAME "Driving Force Pro"
49#define LG4FF_G25_TAG "G25"
50#define LG4FF_G25_NAME "G25 Racing Wheel"
51#define LG4FF_G27_TAG "G27"
52#define LG4FF_G27_NAME "G27 Racing Wheel"
29fae1c8
SW		 53#define LG4FF_G29_TAG "G29"
54#define LG4FF_G29_NAME "G29 Racing Wheel"
b96d23ec
MM		 55#define LG4FF_DFGT_TAG "DFGT"
56#define LG4FF_DFGT_NAME "Driving Force GT"
57
e7c23449
MM		 58#define LG4FF_FFEX_REV_MAJ 0x21
59#define LG4FF_FFEX_REV_MIN 0x00
60
d0afd848
MM		 61static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
62static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
30bb75d7 63
72529c65 64struct lg4ff_wheel_data {
5d9d60ad 65 const u32 product_id;
961af46f 66 u16 combine;
2a552c30 67 u16 range;
5d9d60ad
MM		 68 const u16 min_range;
69 const u16 max_range;
22bcefdc 70#ifdef CONFIG_LEDS_CLASS
2a552c30 71 u8 led_state;
22bcefdc
SW		 72 struct led_classdev *led[5];
73#endif
5d9d60ad
MM		 74 const u32 alternate_modes;
75 const char * const real_tag;
76 const char * const real_name;
77 const u16 real_product_id;
72529c65 78
30bb75d7
MM		 79 void (*set_range)(struct hid_device *hid, u16 range);
80};
81
72529c65 82struct lg4ff_device_entry {
c918fe78 83 spinlock_t report_lock; /* Protect output HID report */
c28abd8c 84 struct hid_report *report;
72529c65
MM		 85 struct lg4ff_wheel_data wdata;
86};
87
7362cd22 88static const signed short lg4ff_wheel_effects[] = {
32c88cbc
SW		 89 FF_CONSTANT,
90 FF_AUTOCENTER,
91 -1
92};
93
e41b3cda
JW		 94static const signed short no_wheel_effects[] = {
95 -1
96};
97
7362cd22 98struct lg4ff_wheel {
2a552c30 99 const u32 product_id;
7362cd22 100 const signed short *ff_effects;
2a552c30
MM		 101 const u16 min_range;
102 const u16 max_range;
30bb75d7 103 void (*set_range)(struct hid_device *hid, u16 range);
7362cd22
MM		 104};
105
e7c23449 106struct lg4ff_compat_mode_switch {
2a552c30
MM		 107 const u8 cmd_count; /* Number of commands to send */
108 const u8 cmd[];
e7c23449
MM		 109};
110
111struct lg4ff_wheel_ident_info {
bbec1bd0 112 const u32 modes;
e7c23449
MM		 113 const u16 mask;
114 const u16 result;
115 const u16 real_product_id;
116};
117
b96d23ec
MM		 118struct lg4ff_multimode_wheel {
119 const u16 product_id;
120 const u32 alternate_modes;
121 const char *real_tag;
122 const char *real_name;
123};
124
125struct lg4ff_alternate_mode {
126 const u16 product_id;
127 const char *tag;
128 const char *name;
129};
130
7362cd22 131static const struct lg4ff_wheel lg4ff_devices[] = {
e41b3cda 132 {USB_DEVICE_ID_LOGITECH_WINGMAN_FG, no_wheel_effects, 40, 180, NULL},
560bea30 133 {USB_DEVICE_ID_LOGITECH_WINGMAN_FFG, lg4ff_wheel_effects, 40, 180, NULL},
30bb75d7
MM		 134 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
135 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
d0afd848
MM		 136 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
137 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
138 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
139 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
29fae1c8 140 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
30bb75d7
MM		 141 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
142 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
7362cd22
MM		 143};
144
b96d23ec
MM		 145static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
146 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
147 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
148 LG4FF_DFP_TAG, LG4FF_DFP_NAME},
149 {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
150 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
151 LG4FF_G25_TAG, LG4FF_G25_NAME},
152 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
153 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
154 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
155 {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
156 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
157 LG4FF_G27_TAG, LG4FF_G27_NAME},
29fae1c8
SW		 158 {USB_DEVICE_ID_LOGITECH_G29_WHEEL,
159 LG4FF_MODE_NATIVE | LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
160 LG4FF_G29_TAG, LG4FF_G29_NAME},
b96d23ec
MM		 161};
162
163static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
164 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
165 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
166 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
167 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
168 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
29fae1c8
SW		 169 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME},
170 [LG4FF_MODE_G29_IDX] = {USB_DEVICE_ID_LOGITECH_G29_WHEEL, LG4FF_G29_TAG, LG4FF_G29_NAME},
b96d23ec
MM		 171};
172
e7c23449
MM		 173/* Multimode wheel identificators */
174static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
bbec1bd0 175 LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
e7c23449
MM		 176 0xf000,
177 0x1000,
178 USB_DEVICE_ID_LOGITECH_DFP_WHEEL
179};
180
181static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
bbec1bd0 182 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
e7c23449
MM		 183 0xff00,
184 0x1200,
185 USB_DEVICE_ID_LOGITECH_G25_WHEEL
186};
187
188static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
bbec1bd0 189 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
e7c23449
MM		 190 0xfff0,
191 0x1230,
192 USB_DEVICE_ID_LOGITECH_G27_WHEEL
96440c8a
MM		 193};
194
e7c23449 195static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
bbec1bd0 196 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
e7c23449
MM		 197 0xff00,
198 0x1300,
199 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
96440c8a
MM		 200};
201
29fae1c8
SW		 202static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info = {
203 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
204 0xfff8,
205 0x1350,
206 USB_DEVICE_ID_LOGITECH_G29_WHEEL
207};
208
209static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info2 = {
210 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
211 0xff00,
212 0x8900,
213 USB_DEVICE_ID_LOGITECH_G29_WHEEL
214};
215
e7c23449 216/* Multimode wheel identification checklists */
bbec1bd0 217static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = {
29fae1c8
SW		 218 &lg4ff_g29_ident_info,
219 &lg4ff_g29_ident_info2,
bbec1bd0
SW		 220 &lg4ff_dfgt_ident_info,
221 &lg4ff_g27_ident_info,
222 &lg4ff_g25_ident_info,
223 &lg4ff_dfp_ident_info
e7c23449
MM		 224};
225
226/* Compatibility mode switching commands */
f31a2de3
MM		 227/* EXT_CMD9 - Understood by G27 and DFGT */
228static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
229 2,
230 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
231 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
96440c8a
MM		 232};
233
f31a2de3 234static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
96440c8a 235 2,
f31a2de3
MM		 236 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
237 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
96440c8a
MM		 238};
239
f31a2de3
MM		 240static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
241 2,
242 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
243 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
96440c8a
MM		 244};
245
f31a2de3 246static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
96440c8a 247 2,
f31a2de3
MM		 248 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
249 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
250};
251
252static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
253 2,
254 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
255 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
256};
257
29fae1c8
SW		 258static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g29 = {
259 2,
260 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
261 0xf8, 0x09, 0x05, 0x01, 0x01, 0x00, 0x00} /* Switch mode to G29 with detach */
262};
263
f31a2de3
MM		 264/* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
265static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
266 1,
267 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
268};
269
270/* EXT_CMD16 - Understood by G25 and G27 */
271static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
272 1,
273 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
96440c8a
MM		 274};
275
2b24a960 276/* Recalculates X axis value accordingly to currently selected range */
2a552c30 277static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
2b24a960 278{
2a552c30
MM		 279 u16 max_range;
280 s32 new_value;
2b24a960
MM		 281
282 if (range == 900)
283 return value;
284 else if (range == 200)
285 return value;
286 else if (range < 200)
287 max_range = 200;
288 else
289 max_range = 900;
290
291 new_value = 8192 + mult_frac(value - 8192, max_range, range);
292 if (new_value < 0)
293 return 0;
294 else if (new_value > 16383)
295 return 16383;
296 else
297 return new_value;
298}
299
300int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
2a552c30 301 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
2b24a960
MM		 302{
303 struct lg4ff_device_entry *entry = drv_data->device_props;
2a552c30 304 s32 new_value = 0;
2b24a960
MM		 305
306 if (!entry) {
307 hid_err(hid, "Device properties not found");
308 return 0;
309 }
310
72529c65 311 switch (entry->wdata.product_id) {
2b24a960
MM		 312 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
313 switch (usage->code) {
314 case ABS_X:
72529c65 315 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
2b24a960
MM		 316 input_event(field->hidinput->input, usage->type, usage->code, new_value);
317 return 1;
318 default:
319 return 0;
320 }
321 default:
322 return 0;
323 }
324}
325
c832f86e
SW		 326int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report,
327 u8 *rd, int size, struct lg_drv_data *drv_data)
328{
b456634b 329 int offset;
c832f86e
SW		 330 struct lg4ff_device_entry *entry = drv_data->device_props;
331
332 if (!entry)
333 return 0;
334
335 /* adjust HID report present combined pedals data */
336 if (entry->wdata.combine) {
337 switch (entry->wdata.product_id) {
338 case USB_DEVICE_ID_LOGITECH_WHEEL:
339 rd[5] = rd[3];
340 rd[6] = 0x7F;
341 return 1;
e41b3cda 342 case USB_DEVICE_ID_LOGITECH_WINGMAN_FG:
560bea30 343 case USB_DEVICE_ID_LOGITECH_WINGMAN_FFG:
c832f86e
SW		 344 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
345 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
346 rd[4] = rd[3];
347 rd[5] = 0x7F;
348 return 1;
349 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
350 rd[5] = rd[4];
351 rd[6] = 0x7F;
352 return 1;
b456634b
SW		 353 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
354 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
355 offset = 5;
356 break;
357 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
358 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
359 offset = 6;
360 break;
361 case USB_DEVICE_ID_LOGITECH_WII_WHEEL:
362 offset = 3;
363 break;
c832f86e
SW		 364 default:
365 return 0;
366 }
b456634b
SW		 367
368 /* Compute a combined axis when wheel does not supply it */
369 rd[offset] = (0xFF + rd[offset] - rd[offset+1]) >> 1;
370 rd[offset+1] = 0x7F;
371 return 1;
c832f86e
SW		 372 }
373
374 return 0;
375}
376
5d9d60ad
MM		 377static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
378 const struct lg4ff_multimode_wheel *mmode_wheel,
379 const u16 real_product_id)
380{
381 u32 alternate_modes = 0;
382 const char *real_tag = NULL;
383 const char *real_name = NULL;
384
385 if (mmode_wheel) {
386 alternate_modes = mmode_wheel->alternate_modes;
387 real_tag = mmode_wheel->real_tag;
388 real_name = mmode_wheel->real_name;
389 }
390
391 {
392 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
393 .real_product_id = real_product_id,
961af46f 394 .combine = 0,
5d9d60ad
MM		 395 .min_range = wheel->min_range,
396 .max_range = wheel->max_range,
397 .set_range = wheel->set_range,
398 .alternate_modes = alternate_modes,
399 .real_tag = real_tag,
400 .real_name = real_name };
401
402 memcpy(wdata, &t_wdata, sizeof(t_wdata));
403 }
404}
405
d0afd848 406static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
32c88cbc
SW		 407{
408 struct hid_device *hid = input_get_drvdata(dev);
c918fe78
MM		 409 struct lg4ff_device_entry *entry;
410 struct lg_drv_data *drv_data;
411 unsigned long flags;
c28abd8c 412 s32 *value;
32c88cbc
SW		 413 int x;
414
c918fe78
MM		 415 drv_data = hid_get_drvdata(hid);
416 if (!drv_data) {
417 hid_err(hid, "Private driver data not found!\n");
418 return -EINVAL;
419 }
420
421 entry = drv_data->device_props;
422 if (!entry) {
423 hid_err(hid, "Device properties not found!\n");
424 return -EINVAL;
425 }
c28abd8c 426 value = entry->report->field[0]->value;
c918fe78 427
a80fe5d6 428#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
32c88cbc
SW		 429
430 switch (effect->type) {
431 case FF_CONSTANT:
432 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
433 CLAMP(x);
56930e7a 434
c918fe78 435 spin_lock_irqsave(&entry->report_lock, flags);
56930e7a
SW		 436 if (x == 0x80) {
437 /* De-activate force in slot-1*/
438 value[0] = 0x13;
439 value[1] = 0x00;
440 value[2] = 0x00;
441 value[3] = 0x00;
442 value[4] = 0x00;
443 value[5] = 0x00;
444 value[6] = 0x00;
445
c28abd8c 446 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 447 spin_unlock_irqrestore(&entry->report_lock, flags);
56930e7a
SW		 448 return 0;
449 }
450
74479ba8
MM		 451 value[0] = 0x11; /* Slot 1 */
452 value[1] = 0x08;
453 value[2] = x;
454 value[3] = 0x80;
455 value[4] = 0x00;
456 value[5] = 0x00;
457 value[6] = 0x00;
32c88cbc 458
c28abd8c 459 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 460 spin_unlock_irqrestore(&entry->report_lock, flags);
32c88cbc
SW		 461 break;
462 }
463 return 0;
464}
465
6e2de8e0
MM		 466/* Sends default autocentering command compatible with
467 * all wheels except Formula Force EX */
d0afd848 468static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
32c88cbc
SW		 469{
470 struct hid_device *hid = input_get_drvdata(dev);
6cb6d98a 471 s32 *value;
2a552c30 472 u32 expand_a, expand_b;
1859762e
SW		 473 struct lg4ff_device_entry *entry;
474 struct lg_drv_data *drv_data;
c918fe78 475 unsigned long flags;
1859762e
SW		 476
477 drv_data = hid_get_drvdata(hid);
478 if (!drv_data) {
479 hid_err(hid, "Private driver data not found!\n");
480 return;
481 }
482
483 entry = drv_data->device_props;
484 if (!entry) {
485 hid_err(hid, "Device properties not found!\n");
486 return;
487 }
c28abd8c 488 value = entry->report->field[0]->value;
f8c23156 489
d2c02da5 490 /* De-activate Auto-Center */
c918fe78 491 spin_lock_irqsave(&entry->report_lock, flags);
d2c02da5
SW		 492 if (magnitude == 0) {
493 value[0] = 0xf5;
494 value[1] = 0x00;
495 value[2] = 0x00;
496 value[3] = 0x00;
497 value[4] = 0x00;
498 value[5] = 0x00;
499 value[6] = 0x00;
500
c28abd8c 501 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 502 spin_unlock_irqrestore(&entry->report_lock, flags);
d2c02da5
SW		 503 return;
504 }
505
f8c23156
SW		 506 if (magnitude <= 0xaaaa) {
507 expand_a = 0x0c * magnitude;
508 expand_b = 0x80 * magnitude;
509 } else {
510 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
511 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
512 }
32c88cbc 513
1859762e 514 /* Adjust for non-MOMO wheels */
72529c65 515 switch (entry->wdata.product_id) {
1859762e
SW		 516 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
517 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
518 break;
519 default:
520 expand_a = expand_a >> 1;
521 break;
522 }
523
74479ba8
MM		 524 value[0] = 0xfe;
525 value[1] = 0x0d;
f8c23156
SW		 526 value[2] = expand_a / 0xaaaa;
527 value[3] = expand_a / 0xaaaa;
528 value[4] = expand_b / 0xaaaa;
74479ba8
MM		 529 value[5] = 0x00;
530 value[6] = 0x00;
32c88cbc 531
c28abd8c 532 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
d2c02da5
SW		 533
534 /* Activate Auto-Center */
535 value[0] = 0x14;
536 value[1] = 0x00;
537 value[2] = 0x00;
538 value[3] = 0x00;
539 value[4] = 0x00;
540 value[5] = 0x00;
541 value[6] = 0x00;
542
c28abd8c 543 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 544 spin_unlock_irqrestore(&entry->report_lock, flags);
32c88cbc
SW		 545}
546
6e2de8e0 547/* Sends autocentering command compatible with Formula Force EX */
d0afd848 548static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
6e2de8e0
MM		 549{
550 struct hid_device *hid = input_get_drvdata(dev);
c918fe78
MM		 551 struct lg4ff_device_entry *entry;
552 struct lg_drv_data *drv_data;
553 unsigned long flags;
c28abd8c 554 s32 *value;
6e2de8e0 555 magnitude = magnitude * 90 / 65535;
6e2de8e0 556
c918fe78
MM		 557 drv_data = hid_get_drvdata(hid);
558 if (!drv_data) {
559 hid_err(hid, "Private driver data not found!\n");
560 return;
561 }
562
563 entry = drv_data->device_props;
564 if (!entry) {
565 hid_err(hid, "Device properties not found!\n");
566 return;
567 }
c28abd8c 568 value = entry->report->field[0]->value;
c918fe78
MM		 569
570 spin_lock_irqsave(&entry->report_lock, flags);
74479ba8
MM		 571 value[0] = 0xfe;
572 value[1] = 0x03;
573 value[2] = magnitude >> 14;
574 value[3] = magnitude >> 14;
575 value[4] = magnitude;
576 value[5] = 0x00;
577 value[6] = 0x00;
6e2de8e0 578
c28abd8c 579 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 580 spin_unlock_irqrestore(&entry->report_lock, flags);
6e2de8e0
MM		 581}
582
30bb75d7 583/* Sends command to set range compatible with G25/G27/Driving Force GT */
d0afd848 584static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
30bb75d7 585{
c918fe78
MM		 586 struct lg4ff_device_entry *entry;
587 struct lg_drv_data *drv_data;
588 unsigned long flags;
c28abd8c 589 s32 *value;
74479ba8 590
c918fe78
MM		 591 drv_data = hid_get_drvdata(hid);
592 if (!drv_data) {
593 hid_err(hid, "Private driver data not found!\n");
594 return;
595 }
596
597 entry = drv_data->device_props;
598 if (!entry) {
599 hid_err(hid, "Device properties not found!\n");
600 return;
601 }
c28abd8c 602 value = entry->report->field[0]->value;
30bb75d7
MM		 603 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
604
c918fe78 605 spin_lock_irqsave(&entry->report_lock, flags);
74479ba8
MM		 606 value[0] = 0xf8;
607 value[1] = 0x81;
608 value[2] = range & 0x00ff;
609 value[3] = (range & 0xff00) >> 8;
610 value[4] = 0x00;
611 value[5] = 0x00;
612 value[6] = 0x00;
30bb75d7 613
c28abd8c 614 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 615 spin_unlock_irqrestore(&entry->report_lock, flags);
30bb75d7
MM		 616}
617
618/* Sends commands to set range compatible with Driving Force Pro wheel */
d0afd848 619static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
30bb75d7 620{
c918fe78
MM		 621 struct lg4ff_device_entry *entry;
622 struct lg_drv_data *drv_data;
623 unsigned long flags;
c28abd8c
MM		 624 int start_left, start_right, full_range;
625 s32 *value;
74479ba8 626
c918fe78
MM		 627 drv_data = hid_get_drvdata(hid);
628 if (!drv_data) {
629 hid_err(hid, "Private driver data not found!\n");
630 return;
631 }
632
633 entry = drv_data->device_props;
634 if (!entry) {
635 hid_err(hid, "Device properties not found!\n");
636 return;
637 }
c28abd8c 638 value = entry->report->field[0]->value;
30bb75d7
MM		 639 dbg_hid("Driving Force Pro: setting range to %u\n", range);
640
641 /* Prepare "coarse" limit command */
c918fe78 642 spin_lock_irqsave(&entry->report_lock, flags);
74479ba8 643 value[0] = 0xf8;
a80fe5d6 644 value[1] = 0x00; /* Set later */
74479ba8
MM		 645 value[2] = 0x00;
646 value[3] = 0x00;
647 value[4] = 0x00;
648 value[5] = 0x00;
649 value[6] = 0x00;
30bb75d7
MM		 650
651 if (range > 200) {
c28abd8c 652 value[1] = 0x03;
30bb75d7
MM		 653 full_range = 900;
654 } else {
c28abd8c 655 value[1] = 0x02;
30bb75d7
MM		 656 full_range = 200;
657 }
c28abd8c 658 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
30bb75d7
MM		 659
660 /* Prepare "fine" limit command */
74479ba8
MM		 661 value[0] = 0x81;
662 value[1] = 0x0b;
663 value[2] = 0x00;
664 value[3] = 0x00;
665 value[4] = 0x00;
666 value[5] = 0x00;
667 value[6] = 0x00;
30bb75d7
MM		 668
669 if (range == 200 || range == 900) { /* Do not apply any fine limit */
c28abd8c 670 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 671 spin_unlock_irqrestore(&entry->report_lock, flags);
30bb75d7
MM		 672 return;
673 }
674
675 /* Construct fine limit command */
676 start_left = (((full_range - range + 1) * 2047) / full_range);
677 start_right = 0xfff - start_left;
678
74479ba8
MM		 679 value[2] = start_left >> 4;
680 value[3] = start_right >> 4;
681 value[4] = 0xff;
682 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
683 value[6] = 0xff;
30bb75d7 684
c28abd8c 685 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 686 spin_unlock_irqrestore(&entry->report_lock, flags);
30bb75d7
MM		 687}
688
f31a2de3
MM		 689static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
690{
691 switch (real_product_id) {
692 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
693 switch (target_product_id) {
694 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
695 return &lg4ff_mode_switch_ext01_dfp;
696 /* DFP can only be switched to its native mode */
697 default:
698 return NULL;
699 }
700 break;
701 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
702 switch (target_product_id) {
703 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
704 return &lg4ff_mode_switch_ext01_dfp;
705 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
706 return &lg4ff_mode_switch_ext16_g25;
707 /* G25 can only be switched to DFP mode or its native mode */
708 default:
709 return NULL;
710 }
711 break;
712 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
713 switch (target_product_id) {
714 case USB_DEVICE_ID_LOGITECH_WHEEL:
715 return &lg4ff_mode_switch_ext09_dfex;
716 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
717 return &lg4ff_mode_switch_ext09_dfp;
718 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
719 return &lg4ff_mode_switch_ext09_g25;
720 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
721 return &lg4ff_mode_switch_ext09_g27;
722 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
723 default:
724 return NULL;
725 }
726 break;
29fae1c8
SW		 727 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
728 switch (target_product_id) {
729 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
730 return &lg4ff_mode_switch_ext09_dfp;
731 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
732 return &lg4ff_mode_switch_ext09_dfgt;
733 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
734 return &lg4ff_mode_switch_ext09_g25;
735 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
736 return &lg4ff_mode_switch_ext09_g27;
737 case USB_DEVICE_ID_LOGITECH_G29_WHEEL:
738 return &lg4ff_mode_switch_ext09_g29;
739 /* G29 can only be switched to DF-EX, DFP, DFGT, G25, G27 or its native mode */
740 default:
741 return NULL;
742 }
743 break;
f31a2de3
MM		 744 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
745 switch (target_product_id) {
746 case USB_DEVICE_ID_LOGITECH_WHEEL:
747 return &lg4ff_mode_switch_ext09_dfex;
748 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
749 return &lg4ff_mode_switch_ext09_dfp;
750 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
751 return &lg4ff_mode_switch_ext09_dfgt;
752 /* DFGT can only be switched to DF-EX, DFP or its native mode */
753 default:
754 return NULL;
755 }
756 break;
757 /* No other wheels have multiple modes */
758 default:
759 return NULL;
760 }
761}
762
e7c23449 763static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
96440c8a 764{
c918fe78
MM		 765 struct lg4ff_device_entry *entry;
766 struct lg_drv_data *drv_data;
767 unsigned long flags;
c28abd8c 768 s32 *value;
e7c23449 769 u8 i;
96440c8a 770
c918fe78
MM		 771 drv_data = hid_get_drvdata(hid);
772 if (!drv_data) {
773 hid_err(hid, "Private driver data not found!\n");
774 return -EINVAL;
775 }
776
777 entry = drv_data->device_props;
778 if (!entry) {
779 hid_err(hid, "Device properties not found!\n");
780 return -EINVAL;
781 }
c28abd8c 782 value = entry->report->field[0]->value;
c918fe78
MM		 783
784 spin_lock_irqsave(&entry->report_lock, flags);
e7c23449 785 for (i = 0; i < s->cmd_count; i++) {
c1740d13 786 u8 j;
96440c8a 787
c1740d13
MM		 788 for (j = 0; j < 7; j++)
789 value[j] = s->cmd[j + (7*i)];
790
c28abd8c 791 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
96440c8a 792 }
c918fe78 793 spin_unlock_irqrestore(&entry->report_lock, flags);
c1740d13 794 hid_hw_wait(hid);
e7c23449 795 return 0;
96440c8a 796}
32c88cbc 797
b96d23ec
MM		 798static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
799{
800 struct hid_device *hid = to_hid_device(dev);
801 struct lg4ff_device_entry *entry;
802 struct lg_drv_data *drv_data;
803 ssize_t count = 0;
804 int i;
805
806 drv_data = hid_get_drvdata(hid);
807 if (!drv_data) {
808 hid_err(hid, "Private driver data not found!\n");
809 return 0;
810 }
811
812 entry = drv_data->device_props;
813 if (!entry) {
814 hid_err(hid, "Device properties not found!\n");
815 return 0;
816 }
817
72529c65 818 if (!entry->wdata.real_name) {
b96d23ec
MM		 819 hid_err(hid, "NULL pointer to string\n");
820 return 0;
821 }
822
823 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
72529c65 824 if (entry->wdata.alternate_modes & BIT(i)) {
b96d23ec
MM		 825 /* Print tag and full name */
826 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
827 lg4ff_alternate_modes[i].tag,
72529c65 828 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
b96d23ec
MM		 829 if (count >= PAGE_SIZE - 1)
830 return count;
831
832 /* Mark the currently active mode with an asterisk */
72529c65
MM		 833 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
834 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
b96d23ec
MM		 835 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
836 else
837 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
838
839 if (count >= PAGE_SIZE - 1)
840 return count;
841 }
842 }
843
844 return count;
845}
846
847static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
848{
f31a2de3
MM		 849 struct hid_device *hid = to_hid_device(dev);
850 struct lg4ff_device_entry *entry;
851 struct lg_drv_data *drv_data;
852 const struct lg4ff_compat_mode_switch *s;
853 u16 target_product_id = 0;
854 int i, ret;
855 char *lbuf;
856
857 drv_data = hid_get_drvdata(hid);
858 if (!drv_data) {
859 hid_err(hid, "Private driver data not found!\n");
860 return -EINVAL;
861 }
862
863 entry = drv_data->device_props;
864 if (!entry) {
865 hid_err(hid, "Device properties not found!\n");
866 return -EINVAL;
867 }
868
869 /* Allow \n at the end of the input parameter */
870 lbuf = kasprintf(GFP_KERNEL, "%s", buf);
871 if (!lbuf)
872 return -ENOMEM;
873
874 i = strlen(lbuf);
875 if (lbuf[i-1] == '\n') {
876 if (i == 1) {
877 kfree(lbuf);
878 return -EINVAL;
879 }
880 lbuf[i-1] = '\0';
881 }
882
883 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
884 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
885 const char *tag = lg4ff_alternate_modes[i].tag;
886
72529c65 887 if (entry->wdata.alternate_modes & BIT(i)) {
f31a2de3
MM		 888 if (!strcmp(tag, lbuf)) {
889 if (!mode_product_id)
72529c65 890 target_product_id = entry->wdata.real_product_id;
f31a2de3
MM		 891 else
892 target_product_id = mode_product_id;
893 break;
894 }
895 }
896 }
897
898 if (i == LG4FF_MODE_MAX_IDX) {
899 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
900 kfree(lbuf);
901 return -EINVAL;
902 }
903 kfree(lbuf); /* Not needed anymore */
904
72529c65 905 if (target_product_id == entry->wdata.product_id) /* Nothing to do */
f31a2de3
MM		 906 return count;
907
908 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
909 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
910 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",
72529c65 911 entry->wdata.real_name);
f31a2de3
MM		 912 return -EINVAL;
913 }
914
915 /* Take care of hardware limitations */
72529c65
MM		 916 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
917 entry->wdata.product_id > target_product_id) {
918 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
f31a2de3
MM		 919 return -EINVAL;
920 }
921
72529c65 922 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
f31a2de3
MM		 923 if (!s) {
924 hid_err(hid, "Invalid target product ID %X\n", target_product_id);
925 return -EINVAL;
926 }
927
928 ret = lg4ff_switch_compatibility_mode(hid, s);
929 return (ret == 0 ? count : ret);
b96d23ec
MM		 930}
931static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
932
961af46f
SW		 933static ssize_t lg4ff_combine_show(struct device *dev, struct device_attribute *attr,
934 char *buf)
935{
936 struct hid_device *hid = to_hid_device(dev);
937 struct lg4ff_device_entry *entry;
938 struct lg_drv_data *drv_data;
939 size_t count;
940
941 drv_data = hid_get_drvdata(hid);
942 if (!drv_data) {
943 hid_err(hid, "Private driver data not found!\n");
944 return 0;
945 }
946
947 entry = drv_data->device_props;
948 if (!entry) {
949 hid_err(hid, "Device properties not found!\n");
950 return 0;
951 }
952
953 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.combine);
954 return count;
955}
956
957static ssize_t lg4ff_combine_store(struct device *dev, struct device_attribute *attr,
958 const char *buf, size_t count)
959{
960 struct hid_device *hid = to_hid_device(dev);
961 struct lg4ff_device_entry *entry;
962 struct lg_drv_data *drv_data;
963 u16 combine = simple_strtoul(buf, NULL, 10);
964
965 drv_data = hid_get_drvdata(hid);
966 if (!drv_data) {
967 hid_err(hid, "Private driver data not found!\n");
968 return -EINVAL;
969 }
970
971 entry = drv_data->device_props;
972 if (!entry) {
973 hid_err(hid, "Device properties not found!\n");
974 return -EINVAL;
975 }
976
977 if (combine > 1)
978 combine = 1;
979
980 entry->wdata.combine = combine;
981 return count;
982}
983static DEVICE_ATTR(combine_pedals, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_combine_show, lg4ff_combine_store);
984
fbf85e2a
MM		 985/* Export the currently set range of the wheel */
986static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
987 char *buf)
30bb75d7 988{
30bb75d7 989 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 990 struct lg4ff_device_entry *entry;
991 struct lg_drv_data *drv_data;
30bb75d7
MM		 992 size_t count;
993
3b6b17b7
MM		 994 drv_data = hid_get_drvdata(hid);
995 if (!drv_data) {
996 hid_err(hid, "Private driver data not found!\n");
997 return 0;
30bb75d7 998 }
3b6b17b7
MM		 999
1000 entry = drv_data->device_props;
1001 if (!entry) {
1002 hid_err(hid, "Device properties not found!\n");
30bb75d7
MM		 1003 return 0;
1004 }
1005
72529c65 1006 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
30bb75d7
MM		 1007 return count;
1008}
1009
1010/* Set range to user specified value, call appropriate function
1011 * according to the type of the wheel */
fbf85e2a
MM		 1012static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr,
1013 const char *buf, size_t count)
30bb75d7 1014{
30bb75d7 1015 struct hid_device *hid = to_hid_device(dev);
3b6b17b7
MM		 1016 struct lg4ff_device_entry *entry;
1017 struct lg_drv_data *drv_data;
2a552c30 1018 u16 range = simple_strtoul(buf, NULL, 10);
30bb75d7 1019
3b6b17b7
MM		 1020 drv_data = hid_get_drvdata(hid);
1021 if (!drv_data) {
1022 hid_err(hid, "Private driver data not found!\n");
29ff6657 1023 return -EINVAL;
30bb75d7 1024 }
3b6b17b7
MM		 1025
1026 entry = drv_data->device_props;
1027 if (!entry) {
1028 hid_err(hid, "Device properties not found!\n");
29ff6657 1029 return -EINVAL;
30bb75d7
MM		 1030 }
1031
1032 if (range == 0)
72529c65 1033 range = entry->wdata.max_range;
30bb75d7
MM		 1034
1035 /* Check if the wheel supports range setting
1036 * and that the range is within limits for the wheel */
72529c65
MM		 1037 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
1038 entry->wdata.set_range(hid, range);
1039 entry->wdata.range = range;
30bb75d7
MM		 1040 }
1041
1042 return count;
1043}
fbf85e2a 1044static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
30bb75d7 1045
b96d23ec
MM		 1046static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
1047{
1048 struct hid_device *hid = to_hid_device(dev);
1049 struct lg4ff_device_entry *entry;
1050 struct lg_drv_data *drv_data;
1051 size_t count;
1052
1053 drv_data = hid_get_drvdata(hid);
1054 if (!drv_data) {
1055 hid_err(hid, "Private driver data not found!\n");
1056 return 0;
1057 }
1058
1059 entry = drv_data->device_props;
1060 if (!entry) {
1061 hid_err(hid, "Device properties not found!\n");
1062 return 0;
1063 }
1064
72529c65 1065 if (!entry->wdata.real_tag || !entry->wdata.real_name) {
b96d23ec
MM		 1066 hid_err(hid, "NULL pointer to string\n");
1067 return 0;
1068 }
1069
72529c65 1070 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
b96d23ec
MM		 1071 return count;
1072}
1073
1074static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
1075{
1076 /* Real ID is a read-only value */
1077 return -EPERM;
1078}
1079static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
1080
22bcefdc 1081#ifdef CONFIG_LEDS_CLASS
2a552c30 1082static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
22bcefdc 1083{
c918fe78
MM		 1084 struct lg_drv_data *drv_data;
1085 struct lg4ff_device_entry *entry;
1086 unsigned long flags;
c28abd8c 1087 s32 *value;
74479ba8 1088
c918fe78
MM		 1089 drv_data = hid_get_drvdata(hid);
1090 if (!drv_data) {
1091 hid_err(hid, "Private driver data not found!\n");
1092 return;
1093 }
1094
1095 entry = drv_data->device_props;
1096 if (!entry) {
1097 hid_err(hid, "Device properties not found!\n");
1098 return;
1099 }
c28abd8c 1100 value = entry->report->field[0]->value;
c918fe78
MM		 1101
1102 spin_lock_irqsave(&entry->report_lock, flags);
74479ba8
MM		 1103 value[0] = 0xf8;
1104 value[1] = 0x12;
1105 value[2] = leds;
1106 value[3] = 0x00;
1107 value[4] = 0x00;
1108 value[5] = 0x00;
1109 value[6] = 0x00;
c28abd8c 1110 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
c918fe78 1111 spin_unlock_irqrestore(&entry->report_lock, flags);
22bcefdc
SW		 1112}
1113
1114static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
1115 enum led_brightness value)
1116{
1117 struct device *dev = led_cdev->dev->parent;
ee79a8f8 1118 struct hid_device *hid = to_hid_device(dev);
4629fd16 1119 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
22bcefdc
SW		 1120 struct lg4ff_device_entry *entry;
1121 int i, state = 0;
1122
1123 if (!drv_data) {
1124 hid_err(hid, "Device data not found.");
1125 return;
1126 }
1127
371a1d9e 1128 entry = drv_data->device_props;
22bcefdc
SW		 1129
1130 if (!entry) {
1131 hid_err(hid, "Device properties not found.");
1132 return;
1133 }
1134
1135 for (i = 0; i < 5; i++) {
72529c65 1136 if (led_cdev != entry->wdata.led[i])
22bcefdc 1137 continue;
72529c65 1138 state = (entry->wdata.led_state >> i) & 1;
22bcefdc 1139 if (value == LED_OFF && state) {
72529c65
MM		 1140 entry->wdata.led_state &= ~(1 << i);
1141 lg4ff_set_leds(hid, entry->wdata.led_state);
22bcefdc 1142 } else if (value != LED_OFF && !state) {
72529c65
MM		 1143 entry->wdata.led_state |= 1 << i;
1144 lg4ff_set_leds(hid, entry->wdata.led_state);
22bcefdc
SW		 1145 }
1146 break;
1147 }
1148}
1149
1150static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
1151{
1152 struct device *dev = led_cdev->dev->parent;
ee79a8f8 1153 struct hid_device *hid = to_hid_device(dev);
4629fd16 1154 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
22bcefdc
SW		 1155 struct lg4ff_device_entry *entry;
1156 int i, value = 0;
1157
1158 if (!drv_data) {
1159 hid_err(hid, "Device data not found.");
1160 return LED_OFF;
1161 }
1162
371a1d9e 1163 entry = drv_data->device_props;
22bcefdc
SW		 1164
1165 if (!entry) {
1166 hid_err(hid, "Device properties not found.");
1167 return LED_OFF;
1168 }
1169
1170 for (i = 0; i < 5; i++)
72529c65
MM		 1171 if (led_cdev == entry->wdata.led[i]) {
1172 value = (entry->wdata.led_state >> i) & 1;
22bcefdc
SW		 1173 break;
1174 }
1175
1176 return value ? LED_FULL : LED_OFF;
1177}
1178#endif
1179
e7c23449
MM		 1180static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
1181{
bbec1bd0
SW		 1182 u32 current_mode;
1183 int i;
e7c23449 1184
bbec1bd0
SW		 1185 /* identify current mode from USB PID */
1186 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) {
1187 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id);
1188 if (reported_product_id == lg4ff_alternate_modes[i].product_id)
1189 break;
e7c23449
MM		 1190 }
1191
bbec1bd0
SW		 1192 if (i == ARRAY_SIZE(lg4ff_alternate_modes))
1193 return 0;
1194
1195 current_mode = BIT(i);
1196
1197 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) {
1198 const u16 mask = lg4ff_main_checklist[i]->mask;
1199 const u16 result = lg4ff_main_checklist[i]->result;
1200 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id;
e7c23449 1201
bbec1bd0
SW		 1202 if ((current_mode & lg4ff_main_checklist[i]->modes) && \
1203 (bcdDevice & mask) == result) {
e7c23449
MM		 1204 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
1205 return real_product_id;
1206 }
1207 }
1208
f31a2de3
MM		 1209 /* No match found. This is either Driving Force or an unknown
1210 * wheel model, do not touch it */
e7c23449
MM		 1211 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
1212 return 0;
1213}
1214
1215static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
1216{
1217 const u16 reported_product_id = hid->product;
1218 int ret;
1219
1220 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
1221 /* Probed wheel is not a multimode wheel */
1222 if (!*real_product_id) {
1223 *real_product_id = reported_product_id;
1224 dbg_hid("Wheel is not a multimode wheel\n");
1225 return LG4FF_MMODE_NOT_MULTIMODE;
1226 }
1227
1228 /* Switch from "Driving Force" mode to native mode automatically.
1229 * Otherwise keep the wheel in its current mode */
1230 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
a54dc779
MM		 1231 reported_product_id != *real_product_id &&
1232 !lg4ff_no_autoswitch) {
f31a2de3 1233 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
e7c23449 1234
f31a2de3 1235 if (!s) {
e7c23449 1236 hid_err(hid, "Invalid product id %X\n", *real_product_id);
b96d23ec 1237 return LG4FF_MMODE_NOT_MULTIMODE;
e7c23449
MM		 1238 }
1239
1240 ret = lg4ff_switch_compatibility_mode(hid, s);
1241 if (ret) {
1242 /* Wheel could not have been switched to native mode,
1243 * leave it in "Driving Force" mode and continue */
1244 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
b96d23ec 1245 return LG4FF_MMODE_IS_MULTIMODE;
e7c23449
MM		 1246 }
1247 return LG4FF_MMODE_SWITCHED;
1248 }
1249
b96d23ec 1250 return LG4FF_MMODE_IS_MULTIMODE;
e7c23449
MM		 1251}
1252
1253
32c88cbc
SW		 1254int lg4ff_init(struct hid_device *hid)
1255{
d9d4b1e4
AS		 1256 struct hid_input *hidinput;
1257 struct input_dev *dev;
c28abd8c
MM		 1258 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
1259 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
e7c23449
MM		 1260 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1261 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
5d9d60ad 1262 const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
30bb75d7 1263 struct lg4ff_device_entry *entry;
3b6b17b7 1264 struct lg_drv_data *drv_data;
b96d23ec
MM		 1265 int error, i, j;
1266 int mmode_ret, mmode_idx = -1;
e7c23449 1267 u16 real_product_id;
32c88cbc 1268
d9d4b1e4
AS		 1269 if (list_empty(&hid->inputs)) {
1270 hid_err(hid, "no inputs found\n");
1271 return -ENODEV;
1272 }
1273 hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1274 dev = hidinput->input;
1275
32c88cbc 1276 /* Check that the report looks ok */
0fb6bd06 1277 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
32c88cbc 1278 return -1;
30bb75d7 1279
72529c65
MM		 1280 drv_data = hid_get_drvdata(hid);
1281 if (!drv_data) {
1282 hid_err(hid, "Cannot add device, private driver data not allocated\n");
1283 return -1;
1284 }
1285 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1286 if (!entry)
1287 return -ENOMEM;
c918fe78 1288 spin_lock_init(&entry->report_lock);
c28abd8c 1289 entry->report = report;
72529c65
MM		 1290 drv_data->device_props = entry;
1291
e7c23449
MM		 1292 /* Check if a multimode wheel has been connected and
1293 * handle it appropriately */
b96d23ec 1294 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
e7c23449
MM		 1295
1296 /* Wheel has been told to switch to native mode. There is no point in going on
1297 * with the initialization as the wheel will do a USB reset when it switches mode
1298 */
b96d23ec 1299 if (mmode_ret == LG4FF_MMODE_SWITCHED)
e7c23449 1300 return 0;
72529c65
MM		 1301 else if (mmode_ret < 0) {
1302 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
1303 error = mmode_ret;
1304 goto err_init;
1305 }
e7c23449 1306
7362cd22
MM		 1307 /* Check what wheel has been connected */
1308 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
1309 if (hid->product == lg4ff_devices[i].product_id) {
1310 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
1311 break;
1312 }
1313 }
1314
1315 if (i == ARRAY_SIZE(lg4ff_devices)) {
9c2a6bd1
MM		 1316 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
1317 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
1318 "Michal Maly <madcatxster@devoid-pointer.net>\n");
72529c65
MM		 1319 error = -1;
1320 goto err_init;
7362cd22 1321 }
32c88cbc 1322
b96d23ec
MM		 1323 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1324 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
1325 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
1326 break;
1327 }
1328
1329 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
1330 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
72529c65
MM		 1331 error = -1;
1332 goto err_init;
b96d23ec
MM		 1333 }
1334 }
1335
7362cd22
MM		 1336 /* Set supported force feedback capabilities */
1337 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
1338 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
32c88cbc 1339
d0afd848 1340 error = input_ff_create_memless(dev, NULL, lg4ff_play);
32c88cbc
SW		 1341
1342 if (error)
72529c65 1343 goto err_init;
30bb75d7 1344
5d9d60ad 1345 /* Initialize device properties */
b96d23ec
MM		 1346 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1347 BUG_ON(mmode_idx == -1);
5d9d60ad 1348 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
b96d23ec 1349 }
5d9d60ad 1350 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
30bb75d7 1351
114a55cf
SW		 1352 /* Check if autocentering is available and
1353 * set the centering force to zero by default */
1354 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
e7c23449
MM		 1355 /* Formula Force EX expects different autocentering command */
1356 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
1357 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
d0afd848 1358 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
114a55cf 1359 else
d0afd848 1360 dev->ff->set_autocenter = lg4ff_set_autocenter_default;
114a55cf
SW		 1361
1362 dev->ff->set_autocenter(dev, 0);
1363 }
1364
30bb75d7 1365 /* Create sysfs interface */
961af46f
SW		 1366 error = device_create_file(&hid->dev, &dev_attr_combine_pedals);
1367 if (error)
1368 hid_warn(hid, "Unable to create sysfs interface for \"combine\", errno %d\n", error);
30bb75d7
MM		 1369 error = device_create_file(&hid->dev, &dev_attr_range);
1370 if (error)
d61a70ec 1371 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
b96d23ec
MM		 1372 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1373 error = device_create_file(&hid->dev, &dev_attr_real_id);
1374 if (error)
d61a70ec 1375 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
b96d23ec
MM		 1376 error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
1377 if (error)
d61a70ec 1378 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error);
b96d23ec 1379 }
30bb75d7
MM		 1380 dbg_hid("sysfs interface created\n");
1381
1382 /* Set the maximum range to start with */
72529c65
MM		 1383 entry->wdata.range = entry->wdata.max_range;
1384 if (entry->wdata.set_range)
1385 entry->wdata.set_range(hid, entry->wdata.range);
30bb75d7 1386
22bcefdc 1387#ifdef CONFIG_LEDS_CLASS
29fae1c8 1388 /* register led subsystem - G27/G29 only */
72529c65 1389 entry->wdata.led_state = 0;
22bcefdc 1390 for (j = 0; j < 5; j++)
72529c65 1391 entry->wdata.led[j] = NULL;
22bcefdc 1392
29fae1c8
SW		 1393 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL ||
1394 lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G29_WHEEL) {
22bcefdc
SW		 1395 struct led_classdev *led;
1396 size_t name_sz;
1397 char *name;
1398
1399 lg4ff_set_leds(hid, 0);
1400
1401 name_sz = strlen(dev_name(&hid->dev)) + 8;
1402
1403 for (j = 0; j < 5; j++) {
1404 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1405 if (!led) {
1406 hid_err(hid, "can't allocate memory for LED %d\n", j);
72529c65 1407 goto err_leds;
22bcefdc
SW		 1408 }
1409
1410 name = (void *)(&led[1]);
1411 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
1412 led->name = name;
1413 led->brightness = 0;
1414 led->max_brightness = 1;
1415 led->brightness_get = lg4ff_led_get_brightness;
1416 led->brightness_set = lg4ff_led_set_brightness;
1417
72529c65 1418 entry->wdata.led[j] = led;
22bcefdc
SW		 1419 error = led_classdev_register(&hid->dev, led);
1420
1421 if (error) {
1422 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
72529c65 1423err_leds:
22bcefdc
SW		 1424 /* Deregister LEDs (if any) */
1425 for (j = 0; j < 5; j++) {
72529c65
MM		 1426 led = entry->wdata.led[j];
1427 entry->wdata.led[j] = NULL;
22bcefdc
SW		 1428 if (!led)
1429 continue;
1430 led_classdev_unregister(led);
1431 kfree(led);
1432 }
1433 goto out; /* Let the driver continue without LEDs */
1434 }
1435 }
1436 }
22bcefdc 1437out:
c6e6dc87 1438#endif
64013800 1439 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
32c88cbc 1440 return 0;
72529c65
MM		 1441
1442err_init:
1443 drv_data->device_props = NULL;
1444 kfree(entry);
1445 return error;
32c88cbc
SW		 1446}
1447
30bb75d7
MM		 1448int lg4ff_deinit(struct hid_device *hid)
1449{
30bb75d7 1450 struct lg4ff_device_entry *entry;
3b6b17b7
MM		 1451 struct lg_drv_data *drv_data;
1452
3b6b17b7
MM		 1453 drv_data = hid_get_drvdata(hid);
1454 if (!drv_data) {
1455 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
1456 return -1;
30bb75d7 1457 }
3b6b17b7 1458 entry = drv_data->device_props;
e7c23449
MM		 1459 if (!entry)
1460 goto out; /* Nothing more to do */
1461
b96d23ec 1462 /* Multimode devices will have at least the "MODE_NATIVE" bit set */
72529c65 1463 if (entry->wdata.alternate_modes) {
b96d23ec
MM		 1464 device_remove_file(&hid->dev, &dev_attr_real_id);
1465 device_remove_file(&hid->dev, &dev_attr_alternate_modes);
1466 }
1467
961af46f 1468 device_remove_file(&hid->dev, &dev_attr_combine_pedals);
72529c65 1469 device_remove_file(&hid->dev, &dev_attr_range);
22bcefdc
SW		 1470#ifdef CONFIG_LEDS_CLASS
1471 {
1472 int j;
1473 struct led_classdev *led;
1474
1475 /* Deregister LEDs (if any) */
1476 for (j = 0; j < 5; j++) {
1477
72529c65
MM		 1478 led = entry->wdata.led[j];
1479 entry->wdata.led[j] = NULL;
22bcefdc
SW		 1480 if (!led)
1481 continue;
1482 led_classdev_unregister(led);
1483 kfree(led);
1484 }
1485 }
1486#endif
b211a638 1487 drv_data->device_props = NULL;
22bcefdc 1488
3b6b17b7 1489 kfree(entry);
e7c23449 1490out:
30bb75d7
MM		 1491 dbg_hid("Device successfully unregistered\n");
1492 return 0;
1493}
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