1 /* 2 * Force feedback support for Logitech Gaming Wheels 3 * 4 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 & 5 * Speed Force Wireless (WiiWheel) 6 * 7 * Copyright (c) 2010 Simon Wood <simon@mungewell.org> 8 */ 9 10 /* 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 24 */ 25 26 27 #include <linux/input.h> 28 #include <linux/usb.h> 29 #include <linux/hid.h> 30 31 #include "usbhid/usbhid.h" 32 #include "hid-lg.h" 33 #include "hid-lg4ff.h" 34 #include "hid-ids.h" 35 36 #define LG4FF_MMODE_IS_MULTIMODE 0 37 #define LG4FF_MMODE_SWITCHED 1 38 #define LG4FF_MMODE_NOT_MULTIMODE 2 39 40 #define LG4FF_MODE_NATIVE_IDX 0 41 #define LG4FF_MODE_DFEX_IDX 1 42 #define LG4FF_MODE_DFP_IDX 2 43 #define LG4FF_MODE_G25_IDX 3 44 #define LG4FF_MODE_DFGT_IDX 4 45 #define LG4FF_MODE_G27_IDX 5 46 #define LG4FF_MODE_G29_IDX 6 47 #define LG4FF_MODE_MAX_IDX 7 48 49 #define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX) 50 #define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX) 51 #define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX) 52 #define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX) 53 #define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX) 54 #define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX) 55 #define LG4FF_MODE_G29 BIT(LG4FF_MODE_G29_IDX) 56 57 #define LG4FF_DFEX_TAG "DF-EX" 58 #define LG4FF_DFEX_NAME "Driving Force / Formula EX" 59 #define LG4FF_DFP_TAG "DFP" 60 #define LG4FF_DFP_NAME "Driving Force Pro" 61 #define LG4FF_G25_TAG "G25" 62 #define LG4FF_G25_NAME "G25 Racing Wheel" 63 #define LG4FF_G27_TAG "G27" 64 #define LG4FF_G27_NAME "G27 Racing Wheel" 65 #define LG4FF_G29_TAG "G29" 66 #define LG4FF_G29_NAME "G29 Racing Wheel" 67 #define LG4FF_DFGT_TAG "DFGT" 68 #define LG4FF_DFGT_NAME "Driving Force GT" 69 70 #define LG4FF_FFEX_REV_MAJ 0x21 71 #define LG4FF_FFEX_REV_MIN 0x00 72 73 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range); 74 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range); 75 76 struct lg4ff_wheel_data { 77 const u32 product_id; 78 u16 combine; 79 u16 range; 80 const u16 min_range; 81 const u16 max_range; 82 #ifdef CONFIG_LEDS_CLASS 83 u8 led_state; 84 struct led_classdev *led[5]; 85 #endif 86 const u32 alternate_modes; 87 const char * const real_tag; 88 const char * const real_name; 89 const u16 real_product_id; 90 91 void (*set_range)(struct hid_device *hid, u16 range); 92 }; 93 94 struct lg4ff_device_entry { 95 spinlock_t report_lock; /* Protect output HID report */ 96 struct hid_report *report; 97 struct lg4ff_wheel_data wdata; 98 }; 99 100 static const signed short lg4ff_wheel_effects[] = { 101 FF_CONSTANT, 102 FF_AUTOCENTER, 103 -1 104 }; 105 106 struct lg4ff_wheel { 107 const u32 product_id; 108 const signed short *ff_effects; 109 const u16 min_range; 110 const u16 max_range; 111 void (*set_range)(struct hid_device *hid, u16 range); 112 }; 113 114 struct lg4ff_compat_mode_switch { 115 const u8 cmd_count; /* Number of commands to send */ 116 const u8 cmd[]; 117 }; 118 119 struct lg4ff_wheel_ident_info { 120 const u32 modes; 121 const u16 mask; 122 const u16 result; 123 const u16 real_product_id; 124 }; 125 126 struct lg4ff_multimode_wheel { 127 const u16 product_id; 128 const u32 alternate_modes; 129 const char *real_tag; 130 const char *real_name; 131 }; 132 133 struct lg4ff_alternate_mode { 134 const u16 product_id; 135 const char *tag; 136 const char *name; 137 }; 138 139 static const struct lg4ff_wheel lg4ff_devices[] = { 140 {USB_DEVICE_ID_LOGITECH_WINGMAN_FFG, lg4ff_wheel_effects, 40, 180, NULL}, 141 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}, 142 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}, 143 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp}, 144 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25}, 145 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25}, 146 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25}, 147 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25}, 148 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL}, 149 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL} 150 }; 151 152 static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = { 153 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, 154 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 155 LG4FF_DFP_TAG, LG4FF_DFP_NAME}, 156 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, 157 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 158 LG4FF_G25_TAG, LG4FF_G25_NAME}, 159 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, 160 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 161 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME}, 162 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, 163 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 164 LG4FF_G27_TAG, LG4FF_G27_NAME}, 165 {USB_DEVICE_ID_LOGITECH_G29_WHEEL, 166 LG4FF_MODE_NATIVE | LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 167 LG4FF_G29_TAG, LG4FF_G29_NAME}, 168 }; 169 170 static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = { 171 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""}, 172 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME}, 173 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME}, 174 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME}, 175 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME}, 176 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME}, 177 [LG4FF_MODE_G29_IDX] = {USB_DEVICE_ID_LOGITECH_G29_WHEEL, LG4FF_G29_TAG, LG4FF_G29_NAME}, 178 }; 179 180 /* Multimode wheel identificators */ 181 static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = { 182 LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 183 0xf000, 184 0x1000, 185 USB_DEVICE_ID_LOGITECH_DFP_WHEEL 186 }; 187 188 static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = { 189 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 190 0xff00, 191 0x1200, 192 USB_DEVICE_ID_LOGITECH_G25_WHEEL 193 }; 194 195 static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = { 196 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 197 0xfff0, 198 0x1230, 199 USB_DEVICE_ID_LOGITECH_G27_WHEEL 200 }; 201 202 static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = { 203 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 204 0xff00, 205 0x1300, 206 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL 207 }; 208 209 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info = { 210 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 211 0xfff8, 212 0x1350, 213 USB_DEVICE_ID_LOGITECH_G29_WHEEL 214 }; 215 216 static const struct lg4ff_wheel_ident_info lg4ff_g29_ident_info2 = { 217 LG4FF_MODE_G29 | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX, 218 0xff00, 219 0x8900, 220 USB_DEVICE_ID_LOGITECH_G29_WHEEL 221 }; 222 223 /* Multimode wheel identification checklists */ 224 static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = { 225 &lg4ff_g29_ident_info, 226 &lg4ff_g29_ident_info2, 227 &lg4ff_dfgt_ident_info, 228 &lg4ff_g27_ident_info, 229 &lg4ff_g25_ident_info, 230 &lg4ff_dfp_ident_info 231 }; 232 233 /* Compatibility mode switching commands */ 234 /* EXT_CMD9 - Understood by G27 and DFGT */ 235 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = { 236 2, 237 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 238 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */ 239 }; 240 241 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = { 242 2, 243 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 244 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */ 245 }; 246 247 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = { 248 2, 249 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 250 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */ 251 }; 252 253 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = { 254 2, 255 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 256 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */ 257 }; 258 259 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = { 260 2, 261 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 262 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */ 263 }; 264 265 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g29 = { 266 2, 267 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */ 268 0xf8, 0x09, 0x05, 0x01, 0x01, 0x00, 0x00} /* Switch mode to G29 with detach */ 269 }; 270 271 /* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */ 272 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = { 273 1, 274 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00} 275 }; 276 277 /* EXT_CMD16 - Understood by G25 and G27 */ 278 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = { 279 1, 280 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00} 281 }; 282 283 /* Recalculates X axis value accordingly to currently selected range */ 284 static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range) 285 { 286 u16 max_range; 287 s32 new_value; 288 289 if (range == 900) 290 return value; 291 else if (range == 200) 292 return value; 293 else if (range < 200) 294 max_range = 200; 295 else 296 max_range = 900; 297 298 new_value = 8192 + mult_frac(value - 8192, max_range, range); 299 if (new_value < 0) 300 return 0; 301 else if (new_value > 16383) 302 return 16383; 303 else 304 return new_value; 305 } 306 307 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field, 308 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data) 309 { 310 struct lg4ff_device_entry *entry = drv_data->device_props; 311 s32 new_value = 0; 312 313 if (!entry) { 314 hid_err(hid, "Device properties not found"); 315 return 0; 316 } 317 318 switch (entry->wdata.product_id) { 319 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 320 switch (usage->code) { 321 case ABS_X: 322 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range); 323 input_event(field->hidinput->input, usage->type, usage->code, new_value); 324 return 1; 325 default: 326 return 0; 327 } 328 default: 329 return 0; 330 } 331 } 332 333 int lg4ff_raw_event(struct hid_device *hdev, struct hid_report *report, 334 u8 *rd, int size, struct lg_drv_data *drv_data) 335 { 336 int offset; 337 struct lg4ff_device_entry *entry = drv_data->device_props; 338 339 if (!entry) 340 return 0; 341 342 /* adjust HID report present combined pedals data */ 343 if (entry->wdata.combine) { 344 switch (entry->wdata.product_id) { 345 case USB_DEVICE_ID_LOGITECH_WHEEL: 346 rd[5] = rd[3]; 347 rd[6] = 0x7F; 348 return 1; 349 case USB_DEVICE_ID_LOGITECH_WINGMAN_FFG: 350 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL: 351 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2: 352 rd[4] = rd[3]; 353 rd[5] = 0x7F; 354 return 1; 355 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 356 rd[5] = rd[4]; 357 rd[6] = 0x7F; 358 return 1; 359 case USB_DEVICE_ID_LOGITECH_G25_WHEEL: 360 case USB_DEVICE_ID_LOGITECH_G27_WHEEL: 361 offset = 5; 362 break; 363 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL: 364 case USB_DEVICE_ID_LOGITECH_G29_WHEEL: 365 offset = 6; 366 break; 367 case USB_DEVICE_ID_LOGITECH_WII_WHEEL: 368 offset = 3; 369 break; 370 default: 371 return 0; 372 } 373 374 /* Compute a combined axis when wheel does not supply it */ 375 rd[offset] = (0xFF + rd[offset] - rd[offset+1]) >> 1; 376 rd[offset+1] = 0x7F; 377 return 1; 378 } 379 380 return 0; 381 } 382 383 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel, 384 const struct lg4ff_multimode_wheel *mmode_wheel, 385 const u16 real_product_id) 386 { 387 u32 alternate_modes = 0; 388 const char *real_tag = NULL; 389 const char *real_name = NULL; 390 391 if (mmode_wheel) { 392 alternate_modes = mmode_wheel->alternate_modes; 393 real_tag = mmode_wheel->real_tag; 394 real_name = mmode_wheel->real_name; 395 } 396 397 { 398 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id, 399 .real_product_id = real_product_id, 400 .combine = 0, 401 .min_range = wheel->min_range, 402 .max_range = wheel->max_range, 403 .set_range = wheel->set_range, 404 .alternate_modes = alternate_modes, 405 .real_tag = real_tag, 406 .real_name = real_name }; 407 408 memcpy(wdata, &t_wdata, sizeof(t_wdata)); 409 } 410 } 411 412 static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect) 413 { 414 struct hid_device *hid = input_get_drvdata(dev); 415 struct lg4ff_device_entry *entry; 416 struct lg_drv_data *drv_data; 417 unsigned long flags; 418 s32 *value; 419 int x; 420 421 drv_data = hid_get_drvdata(hid); 422 if (!drv_data) { 423 hid_err(hid, "Private driver data not found!\n"); 424 return -EINVAL; 425 } 426 427 entry = drv_data->device_props; 428 if (!entry) { 429 hid_err(hid, "Device properties not found!\n"); 430 return -EINVAL; 431 } 432 value = entry->report->field[0]->value; 433 434 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0) 435 436 switch (effect->type) { 437 case FF_CONSTANT: 438 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */ 439 CLAMP(x); 440 441 spin_lock_irqsave(&entry->report_lock, flags); 442 if (x == 0x80) { 443 /* De-activate force in slot-1*/ 444 value[0] = 0x13; 445 value[1] = 0x00; 446 value[2] = 0x00; 447 value[3] = 0x00; 448 value[4] = 0x00; 449 value[5] = 0x00; 450 value[6] = 0x00; 451 452 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 453 spin_unlock_irqrestore(&entry->report_lock, flags); 454 return 0; 455 } 456 457 value[0] = 0x11; /* Slot 1 */ 458 value[1] = 0x08; 459 value[2] = x; 460 value[3] = 0x80; 461 value[4] = 0x00; 462 value[5] = 0x00; 463 value[6] = 0x00; 464 465 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 466 spin_unlock_irqrestore(&entry->report_lock, flags); 467 break; 468 } 469 return 0; 470 } 471 472 /* Sends default autocentering command compatible with 473 * all wheels except Formula Force EX */ 474 static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude) 475 { 476 struct hid_device *hid = input_get_drvdata(dev); 477 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 478 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 479 s32 *value = report->field[0]->value; 480 u32 expand_a, expand_b; 481 struct lg4ff_device_entry *entry; 482 struct lg_drv_data *drv_data; 483 unsigned long flags; 484 485 drv_data = hid_get_drvdata(hid); 486 if (!drv_data) { 487 hid_err(hid, "Private driver data not found!\n"); 488 return; 489 } 490 491 entry = drv_data->device_props; 492 if (!entry) { 493 hid_err(hid, "Device properties not found!\n"); 494 return; 495 } 496 value = entry->report->field[0]->value; 497 498 /* De-activate Auto-Center */ 499 spin_lock_irqsave(&entry->report_lock, flags); 500 if (magnitude == 0) { 501 value[0] = 0xf5; 502 value[1] = 0x00; 503 value[2] = 0x00; 504 value[3] = 0x00; 505 value[4] = 0x00; 506 value[5] = 0x00; 507 value[6] = 0x00; 508 509 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 510 spin_unlock_irqrestore(&entry->report_lock, flags); 511 return; 512 } 513 514 if (magnitude <= 0xaaaa) { 515 expand_a = 0x0c * magnitude; 516 expand_b = 0x80 * magnitude; 517 } else { 518 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa); 519 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa); 520 } 521 522 /* Adjust for non-MOMO wheels */ 523 switch (entry->wdata.product_id) { 524 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL: 525 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2: 526 break; 527 default: 528 expand_a = expand_a >> 1; 529 break; 530 } 531 532 value[0] = 0xfe; 533 value[1] = 0x0d; 534 value[2] = expand_a / 0xaaaa; 535 value[3] = expand_a / 0xaaaa; 536 value[4] = expand_b / 0xaaaa; 537 value[5] = 0x00; 538 value[6] = 0x00; 539 540 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 541 542 /* Activate Auto-Center */ 543 value[0] = 0x14; 544 value[1] = 0x00; 545 value[2] = 0x00; 546 value[3] = 0x00; 547 value[4] = 0x00; 548 value[5] = 0x00; 549 value[6] = 0x00; 550 551 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 552 spin_unlock_irqrestore(&entry->report_lock, flags); 553 } 554 555 /* Sends autocentering command compatible with Formula Force EX */ 556 static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude) 557 { 558 struct hid_device *hid = input_get_drvdata(dev); 559 struct lg4ff_device_entry *entry; 560 struct lg_drv_data *drv_data; 561 unsigned long flags; 562 s32 *value; 563 magnitude = magnitude * 90 / 65535; 564 565 drv_data = hid_get_drvdata(hid); 566 if (!drv_data) { 567 hid_err(hid, "Private driver data not found!\n"); 568 return; 569 } 570 571 entry = drv_data->device_props; 572 if (!entry) { 573 hid_err(hid, "Device properties not found!\n"); 574 return; 575 } 576 value = entry->report->field[0]->value; 577 578 spin_lock_irqsave(&entry->report_lock, flags); 579 value[0] = 0xfe; 580 value[1] = 0x03; 581 value[2] = magnitude >> 14; 582 value[3] = magnitude >> 14; 583 value[4] = magnitude; 584 value[5] = 0x00; 585 value[6] = 0x00; 586 587 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 588 spin_unlock_irqrestore(&entry->report_lock, flags); 589 } 590 591 /* Sends command to set range compatible with G25/G27/Driving Force GT */ 592 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range) 593 { 594 struct lg4ff_device_entry *entry; 595 struct lg_drv_data *drv_data; 596 unsigned long flags; 597 s32 *value; 598 599 drv_data = hid_get_drvdata(hid); 600 if (!drv_data) { 601 hid_err(hid, "Private driver data not found!\n"); 602 return; 603 } 604 605 entry = drv_data->device_props; 606 if (!entry) { 607 hid_err(hid, "Device properties not found!\n"); 608 return; 609 } 610 value = entry->report->field[0]->value; 611 dbg_hid("G25/G27/DFGT: setting range to %u\n", range); 612 613 spin_lock_irqsave(&entry->report_lock, flags); 614 value[0] = 0xf8; 615 value[1] = 0x81; 616 value[2] = range & 0x00ff; 617 value[3] = (range & 0xff00) >> 8; 618 value[4] = 0x00; 619 value[5] = 0x00; 620 value[6] = 0x00; 621 622 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 623 spin_unlock_irqrestore(&entry->report_lock, flags); 624 } 625 626 /* Sends commands to set range compatible with Driving Force Pro wheel */ 627 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range) 628 { 629 struct lg4ff_device_entry *entry; 630 struct lg_drv_data *drv_data; 631 unsigned long flags; 632 int start_left, start_right, full_range; 633 s32 *value; 634 635 drv_data = hid_get_drvdata(hid); 636 if (!drv_data) { 637 hid_err(hid, "Private driver data not found!\n"); 638 return; 639 } 640 641 entry = drv_data->device_props; 642 if (!entry) { 643 hid_err(hid, "Device properties not found!\n"); 644 return; 645 } 646 value = entry->report->field[0]->value; 647 dbg_hid("Driving Force Pro: setting range to %u\n", range); 648 649 /* Prepare "coarse" limit command */ 650 spin_lock_irqsave(&entry->report_lock, flags); 651 value[0] = 0xf8; 652 value[1] = 0x00; /* Set later */ 653 value[2] = 0x00; 654 value[3] = 0x00; 655 value[4] = 0x00; 656 value[5] = 0x00; 657 value[6] = 0x00; 658 659 if (range > 200) { 660 value[1] = 0x03; 661 full_range = 900; 662 } else { 663 value[1] = 0x02; 664 full_range = 200; 665 } 666 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 667 668 /* Prepare "fine" limit command */ 669 value[0] = 0x81; 670 value[1] = 0x0b; 671 value[2] = 0x00; 672 value[3] = 0x00; 673 value[4] = 0x00; 674 value[5] = 0x00; 675 value[6] = 0x00; 676 677 if (range == 200 || range == 900) { /* Do not apply any fine limit */ 678 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 679 spin_unlock_irqrestore(&entry->report_lock, flags); 680 return; 681 } 682 683 /* Construct fine limit command */ 684 start_left = (((full_range - range + 1) * 2047) / full_range); 685 start_right = 0xfff - start_left; 686 687 value[2] = start_left >> 4; 688 value[3] = start_right >> 4; 689 value[4] = 0xff; 690 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe); 691 value[6] = 0xff; 692 693 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 694 spin_unlock_irqrestore(&entry->report_lock, flags); 695 } 696 697 static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id) 698 { 699 switch (real_product_id) { 700 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 701 switch (target_product_id) { 702 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 703 return &lg4ff_mode_switch_ext01_dfp; 704 /* DFP can only be switched to its native mode */ 705 default: 706 return NULL; 707 } 708 break; 709 case USB_DEVICE_ID_LOGITECH_G25_WHEEL: 710 switch (target_product_id) { 711 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 712 return &lg4ff_mode_switch_ext01_dfp; 713 case USB_DEVICE_ID_LOGITECH_G25_WHEEL: 714 return &lg4ff_mode_switch_ext16_g25; 715 /* G25 can only be switched to DFP mode or its native mode */ 716 default: 717 return NULL; 718 } 719 break; 720 case USB_DEVICE_ID_LOGITECH_G27_WHEEL: 721 switch (target_product_id) { 722 case USB_DEVICE_ID_LOGITECH_WHEEL: 723 return &lg4ff_mode_switch_ext09_dfex; 724 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 725 return &lg4ff_mode_switch_ext09_dfp; 726 case USB_DEVICE_ID_LOGITECH_G25_WHEEL: 727 return &lg4ff_mode_switch_ext09_g25; 728 case USB_DEVICE_ID_LOGITECH_G27_WHEEL: 729 return &lg4ff_mode_switch_ext09_g27; 730 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */ 731 default: 732 return NULL; 733 } 734 break; 735 case USB_DEVICE_ID_LOGITECH_G29_WHEEL: 736 switch (target_product_id) { 737 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 738 return &lg4ff_mode_switch_ext09_dfp; 739 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL: 740 return &lg4ff_mode_switch_ext09_dfgt; 741 case USB_DEVICE_ID_LOGITECH_G25_WHEEL: 742 return &lg4ff_mode_switch_ext09_g25; 743 case USB_DEVICE_ID_LOGITECH_G27_WHEEL: 744 return &lg4ff_mode_switch_ext09_g27; 745 case USB_DEVICE_ID_LOGITECH_G29_WHEEL: 746 return &lg4ff_mode_switch_ext09_g29; 747 /* G29 can only be switched to DF-EX, DFP, DFGT, G25, G27 or its native mode */ 748 default: 749 return NULL; 750 } 751 break; 752 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL: 753 switch (target_product_id) { 754 case USB_DEVICE_ID_LOGITECH_WHEEL: 755 return &lg4ff_mode_switch_ext09_dfex; 756 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL: 757 return &lg4ff_mode_switch_ext09_dfp; 758 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL: 759 return &lg4ff_mode_switch_ext09_dfgt; 760 /* DFGT can only be switched to DF-EX, DFP or its native mode */ 761 default: 762 return NULL; 763 } 764 break; 765 /* No other wheels have multiple modes */ 766 default: 767 return NULL; 768 } 769 } 770 771 static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s) 772 { 773 struct lg4ff_device_entry *entry; 774 struct lg_drv_data *drv_data; 775 unsigned long flags; 776 s32 *value; 777 u8 i; 778 779 drv_data = hid_get_drvdata(hid); 780 if (!drv_data) { 781 hid_err(hid, "Private driver data not found!\n"); 782 return -EINVAL; 783 } 784 785 entry = drv_data->device_props; 786 if (!entry) { 787 hid_err(hid, "Device properties not found!\n"); 788 return -EINVAL; 789 } 790 value = entry->report->field[0]->value; 791 792 spin_lock_irqsave(&entry->report_lock, flags); 793 for (i = 0; i < s->cmd_count; i++) { 794 u8 j; 795 796 for (j = 0; j < 7; j++) 797 value[j] = s->cmd[j + (7*i)]; 798 799 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 800 } 801 spin_unlock_irqrestore(&entry->report_lock, flags); 802 hid_hw_wait(hid); 803 return 0; 804 } 805 806 static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf) 807 { 808 struct hid_device *hid = to_hid_device(dev); 809 struct lg4ff_device_entry *entry; 810 struct lg_drv_data *drv_data; 811 ssize_t count = 0; 812 int i; 813 814 drv_data = hid_get_drvdata(hid); 815 if (!drv_data) { 816 hid_err(hid, "Private driver data not found!\n"); 817 return 0; 818 } 819 820 entry = drv_data->device_props; 821 if (!entry) { 822 hid_err(hid, "Device properties not found!\n"); 823 return 0; 824 } 825 826 if (!entry->wdata.real_name) { 827 hid_err(hid, "NULL pointer to string\n"); 828 return 0; 829 } 830 831 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) { 832 if (entry->wdata.alternate_modes & BIT(i)) { 833 /* Print tag and full name */ 834 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s", 835 lg4ff_alternate_modes[i].tag, 836 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name); 837 if (count >= PAGE_SIZE - 1) 838 return count; 839 840 /* Mark the currently active mode with an asterisk */ 841 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id || 842 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id)) 843 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n"); 844 else 845 count += scnprintf(buf + count, PAGE_SIZE - count, "\n"); 846 847 if (count >= PAGE_SIZE - 1) 848 return count; 849 } 850 } 851 852 return count; 853 } 854 855 static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 856 { 857 struct hid_device *hid = to_hid_device(dev); 858 struct lg4ff_device_entry *entry; 859 struct lg_drv_data *drv_data; 860 const struct lg4ff_compat_mode_switch *s; 861 u16 target_product_id = 0; 862 int i, ret; 863 char *lbuf; 864 865 drv_data = hid_get_drvdata(hid); 866 if (!drv_data) { 867 hid_err(hid, "Private driver data not found!\n"); 868 return -EINVAL; 869 } 870 871 entry = drv_data->device_props; 872 if (!entry) { 873 hid_err(hid, "Device properties not found!\n"); 874 return -EINVAL; 875 } 876 877 /* Allow \n at the end of the input parameter */ 878 lbuf = kasprintf(GFP_KERNEL, "%s", buf); 879 if (!lbuf) 880 return -ENOMEM; 881 882 i = strlen(lbuf); 883 if (lbuf[i-1] == '\n') { 884 if (i == 1) { 885 kfree(lbuf); 886 return -EINVAL; 887 } 888 lbuf[i-1] = '\0'; 889 } 890 891 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) { 892 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id; 893 const char *tag = lg4ff_alternate_modes[i].tag; 894 895 if (entry->wdata.alternate_modes & BIT(i)) { 896 if (!strcmp(tag, lbuf)) { 897 if (!mode_product_id) 898 target_product_id = entry->wdata.real_product_id; 899 else 900 target_product_id = mode_product_id; 901 break; 902 } 903 } 904 } 905 906 if (i == LG4FF_MODE_MAX_IDX) { 907 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf); 908 kfree(lbuf); 909 return -EINVAL; 910 } 911 kfree(lbuf); /* Not needed anymore */ 912 913 if (target_product_id == entry->wdata.product_id) /* Nothing to do */ 914 return count; 915 916 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */ 917 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) { 918 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", 919 entry->wdata.real_name); 920 return -EINVAL; 921 } 922 923 /* Take care of hardware limitations */ 924 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) && 925 entry->wdata.product_id > target_product_id) { 926 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name); 927 return -EINVAL; 928 } 929 930 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id); 931 if (!s) { 932 hid_err(hid, "Invalid target product ID %X\n", target_product_id); 933 return -EINVAL; 934 } 935 936 ret = lg4ff_switch_compatibility_mode(hid, s); 937 return (ret == 0 ? count : ret); 938 } 939 static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store); 940 941 static ssize_t lg4ff_combine_show(struct device *dev, struct device_attribute *attr, 942 char *buf) 943 { 944 struct hid_device *hid = to_hid_device(dev); 945 struct lg4ff_device_entry *entry; 946 struct lg_drv_data *drv_data; 947 size_t count; 948 949 drv_data = hid_get_drvdata(hid); 950 if (!drv_data) { 951 hid_err(hid, "Private driver data not found!\n"); 952 return 0; 953 } 954 955 entry = drv_data->device_props; 956 if (!entry) { 957 hid_err(hid, "Device properties not found!\n"); 958 return 0; 959 } 960 961 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.combine); 962 return count; 963 } 964 965 static ssize_t lg4ff_combine_store(struct device *dev, struct device_attribute *attr, 966 const char *buf, size_t count) 967 { 968 struct hid_device *hid = to_hid_device(dev); 969 struct lg4ff_device_entry *entry; 970 struct lg_drv_data *drv_data; 971 u16 combine = simple_strtoul(buf, NULL, 10); 972 973 drv_data = hid_get_drvdata(hid); 974 if (!drv_data) { 975 hid_err(hid, "Private driver data not found!\n"); 976 return -EINVAL; 977 } 978 979 entry = drv_data->device_props; 980 if (!entry) { 981 hid_err(hid, "Device properties not found!\n"); 982 return -EINVAL; 983 } 984 985 if (combine > 1) 986 combine = 1; 987 988 entry->wdata.combine = combine; 989 return count; 990 } 991 static DEVICE_ATTR(combine_pedals, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_combine_show, lg4ff_combine_store); 992 993 /* Export the currently set range of the wheel */ 994 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, 995 char *buf) 996 { 997 struct hid_device *hid = to_hid_device(dev); 998 struct lg4ff_device_entry *entry; 999 struct lg_drv_data *drv_data; 1000 size_t count; 1001 1002 drv_data = hid_get_drvdata(hid); 1003 if (!drv_data) { 1004 hid_err(hid, "Private driver data not found!\n"); 1005 return 0; 1006 } 1007 1008 entry = drv_data->device_props; 1009 if (!entry) { 1010 hid_err(hid, "Device properties not found!\n"); 1011 return 0; 1012 } 1013 1014 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range); 1015 return count; 1016 } 1017 1018 /* Set range to user specified value, call appropriate function 1019 * according to the type of the wheel */ 1020 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, 1021 const char *buf, size_t count) 1022 { 1023 struct hid_device *hid = to_hid_device(dev); 1024 struct lg4ff_device_entry *entry; 1025 struct lg_drv_data *drv_data; 1026 u16 range = simple_strtoul(buf, NULL, 10); 1027 1028 drv_data = hid_get_drvdata(hid); 1029 if (!drv_data) { 1030 hid_err(hid, "Private driver data not found!\n"); 1031 return -EINVAL; 1032 } 1033 1034 entry = drv_data->device_props; 1035 if (!entry) { 1036 hid_err(hid, "Device properties not found!\n"); 1037 return -EINVAL; 1038 } 1039 1040 if (range == 0) 1041 range = entry->wdata.max_range; 1042 1043 /* Check if the wheel supports range setting 1044 * and that the range is within limits for the wheel */ 1045 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) { 1046 entry->wdata.set_range(hid, range); 1047 entry->wdata.range = range; 1048 } 1049 1050 return count; 1051 } 1052 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store); 1053 1054 static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf) 1055 { 1056 struct hid_device *hid = to_hid_device(dev); 1057 struct lg4ff_device_entry *entry; 1058 struct lg_drv_data *drv_data; 1059 size_t count; 1060 1061 drv_data = hid_get_drvdata(hid); 1062 if (!drv_data) { 1063 hid_err(hid, "Private driver data not found!\n"); 1064 return 0; 1065 } 1066 1067 entry = drv_data->device_props; 1068 if (!entry) { 1069 hid_err(hid, "Device properties not found!\n"); 1070 return 0; 1071 } 1072 1073 if (!entry->wdata.real_tag || !entry->wdata.real_name) { 1074 hid_err(hid, "NULL pointer to string\n"); 1075 return 0; 1076 } 1077 1078 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name); 1079 return count; 1080 } 1081 1082 static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 1083 { 1084 /* Real ID is a read-only value */ 1085 return -EPERM; 1086 } 1087 static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store); 1088 1089 #ifdef CONFIG_LEDS_CLASS 1090 static void lg4ff_set_leds(struct hid_device *hid, u8 leds) 1091 { 1092 struct lg_drv_data *drv_data; 1093 struct lg4ff_device_entry *entry; 1094 unsigned long flags; 1095 s32 *value; 1096 1097 drv_data = hid_get_drvdata(hid); 1098 if (!drv_data) { 1099 hid_err(hid, "Private driver data not found!\n"); 1100 return; 1101 } 1102 1103 entry = drv_data->device_props; 1104 if (!entry) { 1105 hid_err(hid, "Device properties not found!\n"); 1106 return; 1107 } 1108 value = entry->report->field[0]->value; 1109 1110 spin_lock_irqsave(&entry->report_lock, flags); 1111 value[0] = 0xf8; 1112 value[1] = 0x12; 1113 value[2] = leds; 1114 value[3] = 0x00; 1115 value[4] = 0x00; 1116 value[5] = 0x00; 1117 value[6] = 0x00; 1118 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT); 1119 spin_unlock_irqrestore(&entry->report_lock, flags); 1120 } 1121 1122 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev, 1123 enum led_brightness value) 1124 { 1125 struct device *dev = led_cdev->dev->parent; 1126 struct hid_device *hid = to_hid_device(dev); 1127 struct lg_drv_data *drv_data = hid_get_drvdata(hid); 1128 struct lg4ff_device_entry *entry; 1129 int i, state = 0; 1130 1131 if (!drv_data) { 1132 hid_err(hid, "Device data not found."); 1133 return; 1134 } 1135 1136 entry = drv_data->device_props; 1137 1138 if (!entry) { 1139 hid_err(hid, "Device properties not found."); 1140 return; 1141 } 1142 1143 for (i = 0; i < 5; i++) { 1144 if (led_cdev != entry->wdata.led[i]) 1145 continue; 1146 state = (entry->wdata.led_state >> i) & 1; 1147 if (value == LED_OFF && state) { 1148 entry->wdata.led_state &= ~(1 << i); 1149 lg4ff_set_leds(hid, entry->wdata.led_state); 1150 } else if (value != LED_OFF && !state) { 1151 entry->wdata.led_state |= 1 << i; 1152 lg4ff_set_leds(hid, entry->wdata.led_state); 1153 } 1154 break; 1155 } 1156 } 1157 1158 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev) 1159 { 1160 struct device *dev = led_cdev->dev->parent; 1161 struct hid_device *hid = to_hid_device(dev); 1162 struct lg_drv_data *drv_data = hid_get_drvdata(hid); 1163 struct lg4ff_device_entry *entry; 1164 int i, value = 0; 1165 1166 if (!drv_data) { 1167 hid_err(hid, "Device data not found."); 1168 return LED_OFF; 1169 } 1170 1171 entry = drv_data->device_props; 1172 1173 if (!entry) { 1174 hid_err(hid, "Device properties not found."); 1175 return LED_OFF; 1176 } 1177 1178 for (i = 0; i < 5; i++) 1179 if (led_cdev == entry->wdata.led[i]) { 1180 value = (entry->wdata.led_state >> i) & 1; 1181 break; 1182 } 1183 1184 return value ? LED_FULL : LED_OFF; 1185 } 1186 #endif 1187 1188 static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice) 1189 { 1190 u32 current_mode; 1191 int i; 1192 1193 /* identify current mode from USB PID */ 1194 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) { 1195 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id); 1196 if (reported_product_id == lg4ff_alternate_modes[i].product_id) 1197 break; 1198 } 1199 1200 if (i == ARRAY_SIZE(lg4ff_alternate_modes)) 1201 return 0; 1202 1203 current_mode = BIT(i); 1204 1205 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) { 1206 const u16 mask = lg4ff_main_checklist[i]->mask; 1207 const u16 result = lg4ff_main_checklist[i]->result; 1208 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id; 1209 1210 if ((current_mode & lg4ff_main_checklist[i]->modes) && \ 1211 (bcdDevice & mask) == result) { 1212 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id); 1213 return real_product_id; 1214 } 1215 } 1216 1217 /* No match found. This is either Driving Force or an unknown 1218 * wheel model, do not touch it */ 1219 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice); 1220 return 0; 1221 } 1222 1223 static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice) 1224 { 1225 const u16 reported_product_id = hid->product; 1226 int ret; 1227 1228 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice); 1229 /* Probed wheel is not a multimode wheel */ 1230 if (!*real_product_id) { 1231 *real_product_id = reported_product_id; 1232 dbg_hid("Wheel is not a multimode wheel\n"); 1233 return LG4FF_MMODE_NOT_MULTIMODE; 1234 } 1235 1236 /* Switch from "Driving Force" mode to native mode automatically. 1237 * Otherwise keep the wheel in its current mode */ 1238 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && 1239 reported_product_id != *real_product_id && 1240 !lg4ff_no_autoswitch) { 1241 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id); 1242 1243 if (!s) { 1244 hid_err(hid, "Invalid product id %X\n", *real_product_id); 1245 return LG4FF_MMODE_NOT_MULTIMODE; 1246 } 1247 1248 ret = lg4ff_switch_compatibility_mode(hid, s); 1249 if (ret) { 1250 /* Wheel could not have been switched to native mode, 1251 * leave it in "Driving Force" mode and continue */ 1252 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret); 1253 return LG4FF_MMODE_IS_MULTIMODE; 1254 } 1255 return LG4FF_MMODE_SWITCHED; 1256 } 1257 1258 return LG4FF_MMODE_IS_MULTIMODE; 1259 } 1260 1261 1262 int lg4ff_init(struct hid_device *hid) 1263 { 1264 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); 1265 struct input_dev *dev = hidinput->input; 1266 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 1267 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 1268 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor); 1269 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice); 1270 const struct lg4ff_multimode_wheel *mmode_wheel = NULL; 1271 struct lg4ff_device_entry *entry; 1272 struct lg_drv_data *drv_data; 1273 int error, i, j; 1274 int mmode_ret, mmode_idx = -1; 1275 u16 real_product_id; 1276 1277 /* Check that the report looks ok */ 1278 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7)) 1279 return -1; 1280 1281 drv_data = hid_get_drvdata(hid); 1282 if (!drv_data) { 1283 hid_err(hid, "Cannot add device, private driver data not allocated\n"); 1284 return -1; 1285 } 1286 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 1287 if (!entry) 1288 return -ENOMEM; 1289 spin_lock_init(&entry->report_lock); 1290 entry->report = report; 1291 drv_data->device_props = entry; 1292 1293 /* Check if a multimode wheel has been connected and 1294 * handle it appropriately */ 1295 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice); 1296 1297 /* Wheel has been told to switch to native mode. There is no point in going on 1298 * with the initialization as the wheel will do a USB reset when it switches mode 1299 */ 1300 if (mmode_ret == LG4FF_MMODE_SWITCHED) 1301 return 0; 1302 else if (mmode_ret < 0) { 1303 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret); 1304 error = mmode_ret; 1305 goto err_init; 1306 } 1307 1308 /* Check what wheel has been connected */ 1309 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { 1310 if (hid->product == lg4ff_devices[i].product_id) { 1311 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id); 1312 break; 1313 } 1314 } 1315 1316 if (i == ARRAY_SIZE(lg4ff_devices)) { 1317 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. " 1318 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or " 1319 "Michal Maly <madcatxster@devoid-pointer.net>\n"); 1320 error = -1; 1321 goto err_init; 1322 } 1323 1324 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1325 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) { 1326 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id) 1327 break; 1328 } 1329 1330 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) { 1331 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id); 1332 error = -1; 1333 goto err_init; 1334 } 1335 } 1336 1337 /* Set supported force feedback capabilities */ 1338 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++) 1339 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit); 1340 1341 error = input_ff_create_memless(dev, NULL, lg4ff_play); 1342 1343 if (error) 1344 goto err_init; 1345 1346 /* Initialize device properties */ 1347 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1348 BUG_ON(mmode_idx == -1); 1349 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx]; 1350 } 1351 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id); 1352 1353 /* Check if autocentering is available and 1354 * set the centering force to zero by default */ 1355 if (test_bit(FF_AUTOCENTER, dev->ffbit)) { 1356 /* Formula Force EX expects different autocentering command */ 1357 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ && 1358 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN) 1359 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex; 1360 else 1361 dev->ff->set_autocenter = lg4ff_set_autocenter_default; 1362 1363 dev->ff->set_autocenter(dev, 0); 1364 } 1365 1366 /* Create sysfs interface */ 1367 error = device_create_file(&hid->dev, &dev_attr_combine_pedals); 1368 if (error) 1369 hid_warn(hid, "Unable to create sysfs interface for \"combine\", errno %d\n", error); 1370 error = device_create_file(&hid->dev, &dev_attr_range); 1371 if (error) 1372 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error); 1373 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) { 1374 error = device_create_file(&hid->dev, &dev_attr_real_id); 1375 if (error) 1376 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error); 1377 error = device_create_file(&hid->dev, &dev_attr_alternate_modes); 1378 if (error) 1379 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error); 1380 } 1381 dbg_hid("sysfs interface created\n"); 1382 1383 /* Set the maximum range to start with */ 1384 entry->wdata.range = entry->wdata.max_range; 1385 if (entry->wdata.set_range) 1386 entry->wdata.set_range(hid, entry->wdata.range); 1387 1388 #ifdef CONFIG_LEDS_CLASS 1389 /* register led subsystem - G27/G29 only */ 1390 entry->wdata.led_state = 0; 1391 for (j = 0; j < 5; j++) 1392 entry->wdata.led[j] = NULL; 1393 1394 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL || 1395 lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G29_WHEEL) { 1396 struct led_classdev *led; 1397 size_t name_sz; 1398 char *name; 1399 1400 lg4ff_set_leds(hid, 0); 1401 1402 name_sz = strlen(dev_name(&hid->dev)) + 8; 1403 1404 for (j = 0; j < 5; j++) { 1405 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); 1406 if (!led) { 1407 hid_err(hid, "can't allocate memory for LED %d\n", j); 1408 goto err_leds; 1409 } 1410 1411 name = (void *)(&led[1]); 1412 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1); 1413 led->name = name; 1414 led->brightness = 0; 1415 led->max_brightness = 1; 1416 led->brightness_get = lg4ff_led_get_brightness; 1417 led->brightness_set = lg4ff_led_set_brightness; 1418 1419 entry->wdata.led[j] = led; 1420 error = led_classdev_register(&hid->dev, led); 1421 1422 if (error) { 1423 hid_err(hid, "failed to register LED %d. Aborting.\n", j); 1424 err_leds: 1425 /* Deregister LEDs (if any) */ 1426 for (j = 0; j < 5; j++) { 1427 led = entry->wdata.led[j]; 1428 entry->wdata.led[j] = NULL; 1429 if (!led) 1430 continue; 1431 led_classdev_unregister(led); 1432 kfree(led); 1433 } 1434 goto out; /* Let the driver continue without LEDs */ 1435 } 1436 } 1437 } 1438 out: 1439 #endif 1440 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n"); 1441 return 0; 1442 1443 err_init: 1444 drv_data->device_props = NULL; 1445 kfree(entry); 1446 return error; 1447 } 1448 1449 int lg4ff_deinit(struct hid_device *hid) 1450 { 1451 struct lg4ff_device_entry *entry; 1452 struct lg_drv_data *drv_data; 1453 1454 drv_data = hid_get_drvdata(hid); 1455 if (!drv_data) { 1456 hid_err(hid, "Error while deinitializing device, no private driver data.\n"); 1457 return -1; 1458 } 1459 entry = drv_data->device_props; 1460 if (!entry) 1461 goto out; /* Nothing more to do */ 1462 1463 /* Multimode devices will have at least the "MODE_NATIVE" bit set */ 1464 if (entry->wdata.alternate_modes) { 1465 device_remove_file(&hid->dev, &dev_attr_real_id); 1466 device_remove_file(&hid->dev, &dev_attr_alternate_modes); 1467 } 1468 1469 device_remove_file(&hid->dev, &dev_attr_combine_pedals); 1470 device_remove_file(&hid->dev, &dev_attr_range); 1471 #ifdef CONFIG_LEDS_CLASS 1472 { 1473 int j; 1474 struct led_classdev *led; 1475 1476 /* Deregister LEDs (if any) */ 1477 for (j = 0; j < 5; j++) { 1478 1479 led = entry->wdata.led[j]; 1480 entry->wdata.led[j] = NULL; 1481 if (!led) 1482 continue; 1483 led_classdev_unregister(led); 1484 kfree(led); 1485 } 1486 } 1487 #endif 1488 hid_hw_stop(hid); 1489 drv_data->device_props = NULL; 1490 1491 kfree(entry); 1492 out: 1493 dbg_hid("Device successfully unregistered\n"); 1494 return 0; 1495 } 1496