1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Force feedback support for Logitech Gaming Wheels 4 * 5 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 & 6 * Speed Force Wireless (WiiWheel) 7 * 8 * Copyright (c) 2010 Simon Wood <simon@mungewell.org> 9 */ 10 11/* 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" 21#include "hid-lg4ff.h" 22#include "hid-ids.h" 23 24#define LG4FF_MMODE_IS_MULTIMODE 0 25#define LG4FF_MMODE_SWITCHED 1 26#define LG4FF_MMODE_NOT_MULTIMODE 2 27 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 34#define LG4FF_MODE_G29_IDX 6 35#define LG4FF_MODE_MAX_IDX 7 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) 43#define LG4FF_MODE_G29 BIT(LG4FF_MODE_G29_IDX) 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" 53#define LG4FF_G29_TAG "G29" 54#define LG4FF_G29_NAME "G29 Racing Wheel" 55#define LG4FF_DFGT_TAG "DFGT" 56#define LG4FF_DFGT_NAME "Driving Force GT" 57 58#define LG4FF_FFEX_REV_MAJ 0x21 59#define LG4FF_FFEX_REV_MIN 0x00 60 61static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range); 62static void lg4ff_set_range_g25(struct hid_device *hid, u16 range); 63 64struct lg4ff_wheel_data { 65 const u32 product_id; 66 u16 combine; 67 u16 range; 68 const u16 min_range; 69 const u16 max_range; 70#ifdef CONFIG_LEDS_CLASS 71 u8 led_state; 72 struct led_classdev *led[5]; 73#endif 74 const u32 alternate_modes; 75 const char * const real_tag; 76 const char * const real_name; 77 const u16 real_product_id; 78 79 void (*set_range)(struct hid_device *hid, u16 range); 80}; 81 82struct lg4ff_device_entry { 83 spinlock_t report_lock; /* Protect output HID report */ 84 struct hid_report *report; 85 struct lg4ff_wheel_data wdata; 86}; 87 88static const signed short lg4ff_wheel_effects[] = { 89 FF_CONSTANT, 90 FF_AUTOCENTER, 91 -1 92}; 93 94static const signed short no_wheel_effects[] = { 95 -1 96}; 97 98struct lg4ff_wheel { 99 const u32 product_id; 100 const signed short *ff_effects; 101 const u16 min_range; 102 const u16 max_range; 103 void (*set_range)(struct hid_device *hid, u16 range); 104}; 105 106struct lg4ff_compat_mode_switch { 107 const u8 cmd_count; /* Number of commands to send */ 108 const u8 cmd[]; 109}; 110 111struct lg4ff_wheel_ident_info { 112 const u32 modes; 113 const u16 mask; 114 const u16 result; 115 const u16 real_product_id; 116}; 117 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 131static const struct lg4ff_wheel lg4ff_devices[] = { 132 {USB_DEVICE_ID_LOGITECH_WINGMAN_FG, no_wheel_effects, 40, 180, NULL}, 133 {USB_DEVICE_ID_LOGITECH_WINGMAN_FFG, lg4ff_wheel_effects, 40, 180, NULL}, 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}, 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}, 140 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25}, 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} 143}; 144 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}, 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}, 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}, 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}, 171}; 172 173/* Multimode wheel identificators */ 174static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = { 175 LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 176 0xf000, 177 0x1000, 178 USB_DEVICE_ID_LOGITECH_DFP_WHEEL 179}; 180 181static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = { 182 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 183 0xff00, 184 0x1200, 185 USB_DEVICE_ID_LOGITECH_G25_WHEEL 186}; 187 188static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = { 189 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 190 0xfff0, 191 0x1230, 192 USB_DEVICE_ID_LOGITECH_G27_WHEEL 193}; 194 195static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = { 196 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 197 0xff00, 198 0x1300, 199 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL 200}; 201 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}; 215 216/* Multimode wheel identification checklists */ 217static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = { 218 &lg4ff_g29_ident_info, 219 &lg4ff_g29_ident_info2, 220 &lg4ff_dfgt_ident_info, 221 &lg4ff_g27_ident_info, 222 &lg4ff_g25_ident_info, 223 &lg4ff_dfp_ident_info 224}; 225 226/* Compatibility mode switching commands */ 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 */ 232}; 233 234static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = { 235 2, 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 */ 238}; 239 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 */ 244}; 245 246static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = { 247 2, 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 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}; 263 264/* 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} 274}; 275 276/* Recalculates X axis value accordingly to currently selected range */ 277static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range) 278{ 279 u16 max_range; 280 s32 new_value; 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, 301 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data) 302{ 303 struct lg4ff_device_entry *entry = drv_data->device_props; 304 s32 new_value = 0; 305 306 if (!entry) { 307 hid_err(hid, "Device properties not found"); 308 return 0; 309 } 310 311 switch (entry->wdata.product_id) { 312 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 313 switch (usage->code) { 314 case ABS_X: 315 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range); 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 326int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report, 327 u8 *rd, int size, struct lg_drv_data *drv_data) 328{ 329 int offset; 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; 342 case USB_DEVICE_ID_LOGITECH_WINGMAN_FG: 343 case USB_DEVICE_ID_LOGITECH_WINGMAN_FFG: 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; 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; 364 default: 365 return 0; 366 } 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; 372 } 373 374 return 0; 375} 376 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, 394 .combine = 0, 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 406static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 407{ 408 struct hid_device *hid = input_get_drvdata(dev); 409 struct lg4ff_device_entry *entry; 410 struct lg_drv_data *drv_data; 411 unsigned long flags; 412 s32 *value; 413 int x; 414 415 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 } 426 value = entry->report->field[0]->value; 427 428#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0) 429 430 switch (effect->type) { 431 case FF_CONSTANT: 432 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */ 433 CLAMP(x); 434 435 spin_lock_irqsave(&entry->report_lock, flags); 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; 445 446 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 447 spin_unlock_irqrestore(&entry->report_lock, flags); 448 return 0; 449 } 450 451 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; 458 459 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 460 spin_unlock_irqrestore(&entry->report_lock, flags); 461 break; 462 } 463 return 0; 464} 465 466/* Sends default autocentering command compatible with 467 * all wheels except Formula Force EX */ 468static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude) 469{ 470 struct hid_device *hid = input_get_drvdata(dev); 471 s32 *value; 472 u32 expand_a, expand_b; 473 struct lg4ff_device_entry *entry; 474 struct lg_drv_data *drv_data; 475 unsigned long flags; 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 } 488 value = entry->report->field[0]->value; 489 490 /* De-activate Auto-Center */ 491 spin_lock_irqsave(&entry->report_lock, flags); 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; 500 501 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 502 spin_unlock_irqrestore(&entry->report_lock, flags); 503 return; 504 } 505 506 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 } 513 514 /* Adjust for non-MOMO wheels */ 515 switch (entry->wdata.product_id) { 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 } 523 524 value[0] = 0xfe; 525 value[1] = 0x0d; 526 value[2] = expand_a / 0xaaaa; 527 value[3] = expand_a / 0xaaaa; 528 value[4] = expand_b / 0xaaaa; 529 value[5] = 0x00; 530 value[6] = 0x00; 531 532 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 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; 542 543 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 544 spin_unlock_irqrestore(&entry->report_lock, flags); 545} 546 547/* Sends autocentering command compatible with Formula Force EX */ 548static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude) 549{ 550 struct hid_device *hid = input_get_drvdata(dev); 551 struct lg4ff_device_entry *entry; 552 struct lg_drv_data *drv_data; 553 unsigned long flags; 554 s32 *value; 555 magnitude = magnitude * 90 / 65535; 556 557 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 } 568 value = entry->report->field[0]->value; 569 570 spin_lock_irqsave(&entry->report_lock, flags); 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; 578 579 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 580 spin_unlock_irqrestore(&entry->report_lock, flags); 581} 582 583/* Sends command to set range compatible with G25/G27/Driving Force GT */ 584static void lg4ff_set_range_g25(struct hid_device *hid, u16 range) 585{ 586 struct lg4ff_device_entry *entry; 587 struct lg_drv_data *drv_data; 588 unsigned long flags; 589 s32 *value; 590 591 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 } 602 value = entry->report->field[0]->value; 603 dbg_hid("G25/G27/DFGT: setting range to %u\n", range); 604 605 spin_lock_irqsave(&entry->report_lock, flags); 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; 613 614 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 615 spin_unlock_irqrestore(&entry->report_lock, flags); 616} 617 618/* Sends commands to set range compatible with Driving Force Pro wheel */ 619static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range) 620{ 621 struct lg4ff_device_entry *entry; 622 struct lg_drv_data *drv_data; 623 unsigned long flags; 624 int start_left, start_right, full_range; 625 s32 *value; 626 627 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 } 638 value = entry->report->field[0]->value; 639 dbg_hid("Driving Force Pro: setting range to %u\n", range); 640 641 /* Prepare "coarse" limit command */ 642 spin_lock_irqsave(&entry->report_lock, flags); 643 value[0] = 0xf8; 644 value[1] = 0x00; /* Set later */ 645 value[2] = 0x00; 646 value[3] = 0x00; 647 value[4] = 0x00; 648 value[5] = 0x00; 649 value[6] = 0x00; 650 651 if (range > 200) { 652 value[1] = 0x03; 653 full_range = 900; 654 } else { 655 value[1] = 0x02; 656 full_range = 200; 657 } 658 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 659 660 /* Prepare "fine" limit command */ 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; 668 669 if (range == 200 || range == 900) { /* Do not apply any fine limit */ 670 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 671 spin_unlock_irqrestore(&entry->report_lock, flags); 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; 678 679 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; 684 685 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 686 spin_unlock_irqrestore(&entry->report_lock, flags); 687} 688 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; 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; 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 763static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s) 764{ 765 struct lg4ff_device_entry *entry; 766 struct lg_drv_data *drv_data; 767 unsigned long flags; 768 s32 *value; 769 u8 i; 770 771 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 } 782 value = entry->report->field[0]->value; 783 784 spin_lock_irqsave(&entry->report_lock, flags); 785 for (i = 0; i < s->cmd_count; i++) { 786 u8 j; 787 788 for (j = 0; j < 7; j++) 789 value[j] = s->cmd[j + (7*i)]; 790 791 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 792 } 793 spin_unlock_irqrestore(&entry->report_lock, flags); 794 hid_hw_wait(hid); 795 return 0; 796} 797 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 } 817 818 if (!entry->wdata.real_name) { 819 hid_err(hid, "NULL pointer to string\n"); 820 return 0; 821 } 822 823 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) { 824 if (entry->wdata.alternate_modes & BIT(i)) { 825 /* Print tag and full name */ 826 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s", 827 lg4ff_alternate_modes[i].tag, 828 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name); 829 if (count >= PAGE_SIZE - 1) 830 return count; 831 832 /* Mark the currently active mode with an asterisk */ 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)) 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{ 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); 875 876 if (i == 0) { 877 kfree(lbuf); 878 return -EINVAL; 879 } 880 881 if (lbuf[i-1] == '\n') { 882 if (i == 1) { 883 kfree(lbuf); 884 return -EINVAL; 885 } 886 lbuf[i-1] = '\0'; 887 } 888 889 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) { 890 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id; 891 const char *tag = lg4ff_alternate_modes[i].tag; 892 893 if (entry->wdata.alternate_modes & BIT(i)) { 894 if (!strcmp(tag, lbuf)) { 895 if (!mode_product_id) 896 target_product_id = entry->wdata.real_product_id; 897 else 898 target_product_id = mode_product_id; 899 break; 900 } 901 } 902 } 903 904 if (i == LG4FF_MODE_MAX_IDX) { 905 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf); 906 kfree(lbuf); 907 return -EINVAL; 908 } 909 kfree(lbuf); /* Not needed anymore */ 910 911 if (target_product_id == entry->wdata.product_id) /* Nothing to do */ 912 return count; 913 914 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */ 915 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) { 916 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", 917 entry->wdata.real_name); 918 return -EINVAL; 919 } 920 921 /* Take care of hardware limitations */ 922 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) && 923 entry->wdata.product_id > target_product_id) { 924 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name); 925 return -EINVAL; 926 } 927 928 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id); 929 if (!s) { 930 hid_err(hid, "Invalid target product ID %X\n", target_product_id); 931 return -EINVAL; 932 } 933 934 ret = lg4ff_switch_compatibility_mode(hid, s); 935 return (ret == 0 ? count : ret); 936} 937static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store); 938 939static ssize_t lg4ff_combine_show(struct device *dev, struct device_attribute *attr, 940 char *buf) 941{ 942 struct hid_device *hid = to_hid_device(dev); 943 struct lg4ff_device_entry *entry; 944 struct lg_drv_data *drv_data; 945 size_t count; 946 947 drv_data = hid_get_drvdata(hid); 948 if (!drv_data) { 949 hid_err(hid, "Private driver data not found!\n"); 950 return 0; 951 } 952 953 entry = drv_data->device_props; 954 if (!entry) { 955 hid_err(hid, "Device properties not found!\n"); 956 return 0; 957 } 958 959 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.combine); 960 return count; 961} 962 963static ssize_t lg4ff_combine_store(struct device *dev, struct device_attribute *attr, 964 const char *buf, size_t count) 965{ 966 struct hid_device *hid = to_hid_device(dev); 967 struct lg4ff_device_entry *entry; 968 struct lg_drv_data *drv_data; 969 u16 combine = simple_strtoul(buf, NULL, 10); 970 971 drv_data = hid_get_drvdata(hid); 972 if (!drv_data) { 973 hid_err(hid, "Private driver data not found!\n"); 974 return -EINVAL; 975 } 976 977 entry = drv_data->device_props; 978 if (!entry) { 979 hid_err(hid, "Device properties not found!\n"); 980 return -EINVAL; 981 } 982 983 if (combine > 1) 984 combine = 1; 985 986 entry->wdata.combine = combine; 987 return count; 988} 989static DEVICE_ATTR(combine_pedals, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_combine_show, lg4ff_combine_store); 990 991/* Export the currently set range of the wheel */ 992static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, 993 char *buf) 994{ 995 struct hid_device *hid = to_hid_device(dev); 996 struct lg4ff_device_entry *entry; 997 struct lg_drv_data *drv_data; 998 size_t count; 999 1000 drv_data = hid_get_drvdata(hid); 1001 if (!drv_data) { 1002 hid_err(hid, "Private driver data not found!\n"); 1003 return 0; 1004 } 1005 1006 entry = drv_data->device_props; 1007 if (!entry) { 1008 hid_err(hid, "Device properties not found!\n"); 1009 return 0; 1010 } 1011 1012 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range); 1013 return count; 1014} 1015 1016/* Set range to user specified value, call appropriate function 1017 * according to the type of the wheel */ 1018static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, 1019 const char *buf, size_t count) 1020{ 1021 struct hid_device *hid = to_hid_device(dev); 1022 struct lg4ff_device_entry *entry; 1023 struct lg_drv_data *drv_data; 1024 u16 range = simple_strtoul(buf, NULL, 10); 1025 1026 drv_data = hid_get_drvdata(hid); 1027 if (!drv_data) { 1028 hid_err(hid, "Private driver data not found!\n"); 1029 return -EINVAL; 1030 } 1031 1032 entry = drv_data->device_props; 1033 if (!entry) { 1034 hid_err(hid, "Device properties not found!\n"); 1035 return -EINVAL; 1036 } 1037 1038 if (range == 0) 1039 range = entry->wdata.max_range; 1040 1041 /* Check if the wheel supports range setting 1042 * and that the range is within limits for the wheel */ 1043 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) { 1044 entry->wdata.set_range(hid, range); 1045 entry->wdata.range = range; 1046 } 1047 1048 return count; 1049} 1050static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store); 1051 1052static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf) 1053{ 1054 struct hid_device *hid = to_hid_device(dev); 1055 struct lg4ff_device_entry *entry; 1056 struct lg_drv_data *drv_data; 1057 size_t count; 1058 1059 drv_data = hid_get_drvdata(hid); 1060 if (!drv_data) { 1061 hid_err(hid, "Private driver data not found!\n"); 1062 return 0; 1063 } 1064 1065 entry = drv_data->device_props; 1066 if (!entry) { 1067 hid_err(hid, "Device properties not found!\n"); 1068 return 0; 1069 } 1070 1071 if (!entry->wdata.real_tag || !entry->wdata.real_name) { 1072 hid_err(hid, "NULL pointer to string\n"); 1073 return 0; 1074 } 1075 1076 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name); 1077 return count; 1078} 1079 1080static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 1081{ 1082 /* Real ID is a read-only value */ 1083 return -EPERM; 1084} 1085static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store); 1086 1087#ifdef CONFIG_LEDS_CLASS 1088static void lg4ff_set_leds(struct hid_device *hid, u8 leds) 1089{ 1090 struct lg_drv_data *drv_data; 1091 struct lg4ff_device_entry *entry; 1092 unsigned long flags; 1093 s32 *value; 1094 1095 drv_data = hid_get_drvdata(hid); 1096 if (!drv_data) { 1097 hid_err(hid, "Private driver data not found!\n"); 1098 return; 1099 } 1100 1101 entry = drv_data->device_props; 1102 if (!entry) { 1103 hid_err(hid, "Device properties not found!\n"); 1104 return; 1105 } 1106 value = entry->report->field[0]->value; 1107 1108 spin_lock_irqsave(&entry->report_lock, flags); 1109 value[0] = 0xf8; 1110 value[1] = 0x12; 1111 value[2] = leds; 1112 value[3] = 0x00; 1113 value[4] = 0x00; 1114 value[5] = 0x00; 1115 value[6] = 0x00; 1116 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 1117 spin_unlock_irqrestore(&entry->report_lock, flags); 1118} 1119 1120static void lg4ff_led_set_brightness(struct led_classdev *led_cdev, 1121 enum led_brightness value) 1122{ 1123 struct device *dev = led_cdev->dev->parent; 1124 struct hid_device *hid = to_hid_device(dev); 1125 struct lg_drv_data *drv_data = hid_get_drvdata(hid); 1126 struct lg4ff_device_entry *entry; 1127 int i, state = 0; 1128 1129 if (!drv_data) { 1130 hid_err(hid, "Device data not found."); 1131 return; 1132 } 1133 1134 entry = drv_data->device_props; 1135 1136 if (!entry) { 1137 hid_err(hid, "Device properties not found."); 1138 return; 1139 } 1140 1141 for (i = 0; i < 5; i++) { 1142 if (led_cdev != entry->wdata.led[i]) 1143 continue; 1144 state = (entry->wdata.led_state >> i) & 1; 1145 if (value == LED_OFF && state) { 1146 entry->wdata.led_state &= ~(1 << i); 1147 lg4ff_set_leds(hid, entry->wdata.led_state); 1148 } else if (value != LED_OFF && !state) { 1149 entry->wdata.led_state |= 1 << i; 1150 lg4ff_set_leds(hid, entry->wdata.led_state); 1151 } 1152 break; 1153 } 1154} 1155 1156static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev) 1157{ 1158 struct device *dev = led_cdev->dev->parent; 1159 struct hid_device *hid = to_hid_device(dev); 1160 struct lg_drv_data *drv_data = hid_get_drvdata(hid); 1161 struct lg4ff_device_entry *entry; 1162 int i, value = 0; 1163 1164 if (!drv_data) { 1165 hid_err(hid, "Device data not found."); 1166 return LED_OFF; 1167 } 1168 1169 entry = drv_data->device_props; 1170 1171 if (!entry) { 1172 hid_err(hid, "Device properties not found."); 1173 return LED_OFF; 1174 } 1175 1176 for (i = 0; i < 5; i++) 1177 if (led_cdev == entry->wdata.led[i]) { 1178 value = (entry->wdata.led_state >> i) & 1; 1179 break; 1180 } 1181 1182 return value ? LED_FULL : LED_OFF; 1183} 1184#endif 1185 1186static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice) 1187{ 1188 u32 current_mode; 1189 int i; 1190 1191 /* identify current mode from USB PID */ 1192 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) { 1193 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id); 1194 if (reported_product_id == lg4ff_alternate_modes[i].product_id) 1195 break; 1196 } 1197 1198 if (i == ARRAY_SIZE(lg4ff_alternate_modes)) 1199 return 0; 1200 1201 current_mode = BIT(i); 1202 1203 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) { 1204 const u16 mask = lg4ff_main_checklist[i]->mask; 1205 const u16 result = lg4ff_main_checklist[i]->result; 1206 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id; 1207 1208 if ((current_mode & lg4ff_main_checklist[i]->modes) && \ 1209 (bcdDevice & mask) == result) { 1210 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id); 1211 return real_product_id; 1212 } 1213 } 1214 1215 /* No match found. This is either Driving Force or an unknown 1216 * wheel model, do not touch it */ 1217 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice); 1218 return 0; 1219} 1220 1221static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice) 1222{ 1223 const u16 reported_product_id = hid->product; 1224 int ret; 1225 1226 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice); 1227 /* Probed wheel is not a multimode wheel */ 1228 if (!*real_product_id) { 1229 *real_product_id = reported_product_id; 1230 dbg_hid("Wheel is not a multimode wheel\n"); 1231 return LG4FF_MMODE_NOT_MULTIMODE; 1232 } 1233 1234 /* Switch from "Driving Force" mode to native mode automatically. 1235 * Otherwise keep the wheel in its current mode */ 1236 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && 1237 reported_product_id != *real_product_id && 1238 !lg4ff_no_autoswitch) { 1239 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id); 1240 1241 if (!s) { 1242 hid_err(hid, "Invalid product id %X\n", *real_product_id); 1243 return LG4FF_MMODE_NOT_MULTIMODE; 1244 } 1245 1246 ret = lg4ff_switch_compatibility_mode(hid, s); 1247 if (ret) { 1248 /* Wheel could not have been switched to native mode, 1249 * leave it in "Driving Force" mode and continue */ 1250 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret); 1251 return LG4FF_MMODE_IS_MULTIMODE; 1252 } 1253 return LG4FF_MMODE_SWITCHED; 1254 } 1255 1256 return LG4FF_MMODE_IS_MULTIMODE; 1257} 1258 1259 1260int lg4ff_init(struct hid_device *hid) 1261{ 1262 struct hid_input *hidinput; 1263 struct input_dev *dev; 1264 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 1265 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 1266 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor); 1267 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice); 1268 const struct lg4ff_multimode_wheel *mmode_wheel = NULL; 1269 struct lg4ff_device_entry *entry; 1270 struct lg_drv_data *drv_data; 1271 int error, i, j; 1272 int mmode_ret, mmode_idx = -1; 1273 u16 real_product_id; 1274 1275 if (list_empty(&hid->inputs)) { 1276 hid_err(hid, "no inputs found\n"); 1277 return -ENODEV; 1278 } 1279 hidinput = list_entry(hid->inputs.next, struct hid_input, list); 1280 dev = hidinput->input; 1281 1282 /* Check that the report looks ok */ 1283 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7)) 1284 return -1; 1285 1286 drv_data = hid_get_drvdata(hid); 1287 if (!drv_data) { 1288 hid_err(hid, "Cannot add device, private driver data not allocated\n"); 1289 return -1; 1290 } 1291 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 1292 if (!entry) 1293 return -ENOMEM; 1294 spin_lock_init(&entry->report_lock); 1295 entry->report = report; 1296 drv_data->device_props = entry; 1297 1298 /* Check if a multimode wheel has been connected and 1299 * handle it appropriately */ 1300 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice); 1301 1302 /* Wheel has been told to switch to native mode. There is no point in going on 1303 * with the initialization as the wheel will do a USB reset when it switches mode 1304 */ 1305 if (mmode_ret == LG4FF_MMODE_SWITCHED) 1306 return 0; 1307 else if (mmode_ret < 0) { 1308 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret); 1309 error = mmode_ret; 1310 goto err_init; 1311 } 1312 1313 /* Check what wheel has been connected */ 1314 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { 1315 if (hid->product == lg4ff_devices[i].product_id) { 1316 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id); 1317 break; 1318 } 1319 } 1320 1321 if (i == ARRAY_SIZE(lg4ff_devices)) { 1322 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. " 1323 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or " 1324 "Michal Maly <madcatxster@devoid-pointer.net>\n"); 1325 error = -1; 1326 goto err_init; 1327 } 1328 1329 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1330 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) { 1331 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id) 1332 break; 1333 } 1334 1335 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) { 1336 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id); 1337 error = -1; 1338 goto err_init; 1339 } 1340 } 1341 1342 /* Set supported force feedback capabilities */ 1343 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++) 1344 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit); 1345 1346 error = input_ff_create_memless(dev, NULL, lg4ff_play); 1347 1348 if (error) 1349 goto err_init; 1350 1351 /* Initialize device properties */ 1352 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1353 BUG_ON(mmode_idx == -1); 1354 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx]; 1355 } 1356 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id); 1357 1358 /* Check if autocentering is available and 1359 * set the centering force to zero by default */ 1360 if (test_bit(FF_AUTOCENTER, dev->ffbit)) { 1361 /* Formula Force EX expects different autocentering command */ 1362 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ && 1363 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN) 1364 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex; 1365 else 1366 dev->ff->set_autocenter = lg4ff_set_autocenter_default; 1367 1368 dev->ff->set_autocenter(dev, 0); 1369 } 1370 1371 /* Create sysfs interface */ 1372 error = device_create_file(&hid->dev, &dev_attr_combine_pedals); 1373 if (error) 1374 hid_warn(hid, "Unable to create sysfs interface for \"combine\", errno %d\n", error); 1375 error = device_create_file(&hid->dev, &dev_attr_range); 1376 if (error) 1377 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error); 1378 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1379 error = device_create_file(&hid->dev, &dev_attr_real_id); 1380 if (error) 1381 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error); 1382 error = device_create_file(&hid->dev, &dev_attr_alternate_modes); 1383 if (error) 1384 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error); 1385 } 1386 dbg_hid("sysfs interface created\n"); 1387 1388 /* Set the maximum range to start with */ 1389 entry->wdata.range = entry->wdata.max_range; 1390 if (entry->wdata.set_range) 1391 entry->wdata.set_range(hid, entry->wdata.range); 1392 1393#ifdef CONFIG_LEDS_CLASS 1394 /* register led subsystem - G27/G29 only */ 1395 entry->wdata.led_state = 0; 1396 for (j = 0; j < 5; j++) 1397 entry->wdata.led[j] = NULL; 1398 1399 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL || 1400 lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G29_WHEEL) { 1401 struct led_classdev *led; 1402 size_t name_sz; 1403 char *name; 1404 1405 lg4ff_set_leds(hid, 0); 1406 1407 name_sz = strlen(dev_name(&hid->dev)) + 8; 1408 1409 for (j = 0; j < 5; j++) { 1410 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); 1411 if (!led) { 1412 hid_err(hid, "can't allocate memory for LED %d\n", j); 1413 goto err_leds; 1414 } 1415 1416 name = (void *)(&led[1]); 1417 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1); 1418 led->name = name; 1419 led->brightness = 0; 1420 led->max_brightness = 1; 1421 led->brightness_get = lg4ff_led_get_brightness; 1422 led->brightness_set = lg4ff_led_set_brightness; 1423 1424 entry->wdata.led[j] = led; 1425 error = led_classdev_register(&hid->dev, led); 1426 1427 if (error) { 1428 hid_err(hid, "failed to register LED %d. Aborting.\n", j); 1429err_leds: 1430 /* Deregister LEDs (if any) */ 1431 for (j = 0; j < 5; j++) { 1432 led = entry->wdata.led[j]; 1433 entry->wdata.led[j] = NULL; 1434 if (!led) 1435 continue; 1436 led_classdev_unregister(led); 1437 kfree(led); 1438 } 1439 goto out; /* Let the driver continue without LEDs */ 1440 } 1441 } 1442 } 1443out: 1444#endif 1445 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n"); 1446 return 0; 1447 1448err_init: 1449 drv_data->device_props = NULL; 1450 kfree(entry); 1451 return error; 1452} 1453 1454int lg4ff_deinit(struct hid_device *hid) 1455{ 1456 struct lg4ff_device_entry *entry; 1457 struct lg_drv_data *drv_data; 1458 1459 drv_data = hid_get_drvdata(hid); 1460 if (!drv_data) { 1461 hid_err(hid, "Error while deinitializing device, no private driver data.\n"); 1462 return -1; 1463 } 1464 entry = drv_data->device_props; 1465 if (!entry) 1466 goto out; /* Nothing more to do */ 1467 1468 /* Multimode devices will have at least the "MODE_NATIVE" bit set */ 1469 if (entry->wdata.alternate_modes) { 1470 device_remove_file(&hid->dev, &dev_attr_real_id); 1471 device_remove_file(&hid->dev, &dev_attr_alternate_modes); 1472 } 1473 1474 device_remove_file(&hid->dev, &dev_attr_combine_pedals); 1475 device_remove_file(&hid->dev, &dev_attr_range); 1476#ifdef CONFIG_LEDS_CLASS 1477 { 1478 int j; 1479 struct led_classdev *led; 1480 1481 /* Deregister LEDs (if any) */ 1482 for (j = 0; j < 5; j++) { 1483 1484 led = entry->wdata.led[j]; 1485 entry->wdata.led[j] = NULL; 1486 if (!led) 1487 continue; 1488 led_classdev_unregister(led); 1489 kfree(led); 1490 } 1491 } 1492#endif 1493 drv_data->device_props = NULL; 1494 1495 kfree(entry); 1496out: 1497 dbg_hid("Device successfully unregistered\n"); 1498 return 0; 1499} 1500