1 /* 2 * Copyright (c) 2000-2001 Vojtech Pavlik 3 * Copyright (c) 2006-2010 Jiri Kosina 4 * 5 * HID to Linux Input mapping 6 */ 7 8 /* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * Should you need to contact me, the author, you can do so either by 24 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 25 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 26 */ 27 28 #include <linux/module.h> 29 #include <linux/slab.h> 30 #include <linux/kernel.h> 31 32 #include <linux/hid.h> 33 #include <linux/hid-debug.h> 34 35 #include "hid-ids.h" 36 37 #define unk KEY_UNKNOWN 38 39 static const unsigned char hid_keyboard[256] = { 40 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 41 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 42 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 43 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 44 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 45 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 46 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 47 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 48 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk, 49 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk, 50 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 51 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk, 52 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 53 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk, 54 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 55 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk 56 }; 57 58 static const struct { 59 __s32 x; 60 __s32 y; 61 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 62 63 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) 64 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) 65 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) 66 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c)) 67 68 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 69 &max, EV_ABS, (c)) 70 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 71 &max, EV_KEY, (c)) 72 73 static bool match_scancode(struct hid_usage *usage, 74 unsigned int cur_idx, unsigned int scancode) 75 { 76 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode; 77 } 78 79 static bool match_keycode(struct hid_usage *usage, 80 unsigned int cur_idx, unsigned int keycode) 81 { 82 /* 83 * We should exclude unmapped usages when doing lookup by keycode. 84 */ 85 return (usage->type == EV_KEY && usage->code == keycode); 86 } 87 88 static bool match_index(struct hid_usage *usage, 89 unsigned int cur_idx, unsigned int idx) 90 { 91 return cur_idx == idx; 92 } 93 94 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage, 95 unsigned int cur_idx, unsigned int val); 96 97 static struct hid_usage *hidinput_find_key(struct hid_device *hid, 98 hid_usage_cmp_t match, 99 unsigned int value, 100 unsigned int *usage_idx) 101 { 102 unsigned int i, j, k, cur_idx = 0; 103 struct hid_report *report; 104 struct hid_usage *usage; 105 106 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 107 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 108 for (i = 0; i < report->maxfield; i++) { 109 for (j = 0; j < report->field[i]->maxusage; j++) { 110 usage = report->field[i]->usage + j; 111 if (usage->type == EV_KEY || usage->type == 0) { 112 if (match(usage, cur_idx, value)) { 113 if (usage_idx) 114 *usage_idx = cur_idx; 115 return usage; 116 } 117 cur_idx++; 118 } 119 } 120 } 121 } 122 } 123 return NULL; 124 } 125 126 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid, 127 const struct input_keymap_entry *ke, 128 unsigned int *index) 129 { 130 struct hid_usage *usage; 131 unsigned int scancode; 132 133 if (ke->flags & INPUT_KEYMAP_BY_INDEX) 134 usage = hidinput_find_key(hid, match_index, ke->index, index); 135 else if (input_scancode_to_scalar(ke, &scancode) == 0) 136 usage = hidinput_find_key(hid, match_scancode, scancode, index); 137 else 138 usage = NULL; 139 140 return usage; 141 } 142 143 static int hidinput_getkeycode(struct input_dev *dev, 144 struct input_keymap_entry *ke) 145 { 146 struct hid_device *hid = input_get_drvdata(dev); 147 struct hid_usage *usage; 148 unsigned int scancode, index; 149 150 usage = hidinput_locate_usage(hid, ke, &index); 151 if (usage) { 152 ke->keycode = usage->type == EV_KEY ? 153 usage->code : KEY_RESERVED; 154 ke->index = index; 155 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE); 156 ke->len = sizeof(scancode); 157 memcpy(ke->scancode, &scancode, sizeof(scancode)); 158 return 0; 159 } 160 161 return -EINVAL; 162 } 163 164 static int hidinput_setkeycode(struct input_dev *dev, 165 const struct input_keymap_entry *ke, 166 unsigned int *old_keycode) 167 { 168 struct hid_device *hid = input_get_drvdata(dev); 169 struct hid_usage *usage; 170 171 usage = hidinput_locate_usage(hid, ke, NULL); 172 if (usage) { 173 *old_keycode = usage->type == EV_KEY ? 174 usage->code : KEY_RESERVED; 175 usage->code = ke->keycode; 176 177 clear_bit(*old_keycode, dev->keybit); 178 set_bit(usage->code, dev->keybit); 179 dbg_hid("Assigned keycode %d to HID usage code %x\n", 180 usage->code, usage->hid); 181 182 /* 183 * Set the keybit for the old keycode if the old keycode is used 184 * by another key 185 */ 186 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 187 set_bit(*old_keycode, dev->keybit); 188 189 return 0; 190 } 191 192 return -EINVAL; 193 } 194 195 196 /** 197 * hidinput_calc_abs_res - calculate an absolute axis resolution 198 * @field: the HID report field to calculate resolution for 199 * @code: axis code 200 * 201 * The formula is: 202 * (logical_maximum - logical_minimum) 203 * resolution = ---------------------------------------------------------- 204 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 205 * 206 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 207 * 208 * Only exponent 1 length units are processed. Centimeters and inches are 209 * converted to millimeters. Degrees are converted to radians. 210 */ 211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 212 { 213 __s32 unit_exponent = field->unit_exponent; 214 __s32 logical_extents = field->logical_maximum - 215 field->logical_minimum; 216 __s32 physical_extents = field->physical_maximum - 217 field->physical_minimum; 218 __s32 prev; 219 220 /* Check if the extents are sane */ 221 if (logical_extents <= 0 || physical_extents <= 0) 222 return 0; 223 224 /* 225 * Verify and convert units. 226 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 227 */ 228 switch (code) { 229 case ABS_X: 230 case ABS_Y: 231 case ABS_Z: 232 case ABS_MT_POSITION_X: 233 case ABS_MT_POSITION_Y: 234 case ABS_MT_TOOL_X: 235 case ABS_MT_TOOL_Y: 236 case ABS_MT_TOUCH_MAJOR: 237 case ABS_MT_TOUCH_MINOR: 238 if (field->unit == 0x11) { /* If centimeters */ 239 /* Convert to millimeters */ 240 unit_exponent += 1; 241 } else if (field->unit == 0x13) { /* If inches */ 242 /* Convert to millimeters */ 243 prev = physical_extents; 244 physical_extents *= 254; 245 if (physical_extents < prev) 246 return 0; 247 unit_exponent -= 1; 248 } else { 249 return 0; 250 } 251 break; 252 253 case ABS_RX: 254 case ABS_RY: 255 case ABS_RZ: 256 case ABS_WHEEL: 257 case ABS_TILT_X: 258 case ABS_TILT_Y: 259 if (field->unit == 0x14) { /* If degrees */ 260 /* Convert to radians */ 261 prev = logical_extents; 262 logical_extents *= 573; 263 if (logical_extents < prev) 264 return 0; 265 unit_exponent += 1; 266 } else if (field->unit != 0x12) { /* If not radians */ 267 return 0; 268 } 269 break; 270 271 default: 272 return 0; 273 } 274 275 /* Apply negative unit exponent */ 276 for (; unit_exponent < 0; unit_exponent++) { 277 prev = logical_extents; 278 logical_extents *= 10; 279 if (logical_extents < prev) 280 return 0; 281 } 282 /* Apply positive unit exponent */ 283 for (; unit_exponent > 0; unit_exponent--) { 284 prev = physical_extents; 285 physical_extents *= 10; 286 if (physical_extents < prev) 287 return 0; 288 } 289 290 /* Calculate resolution */ 291 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 292 } 293 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 294 295 #ifdef CONFIG_HID_BATTERY_STRENGTH 296 static enum power_supply_property hidinput_battery_props[] = { 297 POWER_SUPPLY_PROP_PRESENT, 298 POWER_SUPPLY_PROP_ONLINE, 299 POWER_SUPPLY_PROP_CAPACITY, 300 POWER_SUPPLY_PROP_MODEL_NAME, 301 POWER_SUPPLY_PROP_STATUS, 302 POWER_SUPPLY_PROP_SCOPE, 303 }; 304 305 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 306 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 307 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 308 309 static const struct hid_device_id hid_battery_quirks[] = { 310 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 311 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 312 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 313 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 314 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 315 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 316 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 317 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 318 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 319 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 320 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 321 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 322 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 323 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 324 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 325 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 326 USB_DEVICE_ID_ELECOM_BM084), 327 HID_BATTERY_QUIRK_IGNORE }, 328 {} 329 }; 330 331 static unsigned find_battery_quirk(struct hid_device *hdev) 332 { 333 unsigned quirks = 0; 334 const struct hid_device_id *match; 335 336 match = hid_match_id(hdev, hid_battery_quirks); 337 if (match != NULL) 338 quirks = match->driver_data; 339 340 return quirks; 341 } 342 343 static int hidinput_scale_battery_capacity(struct hid_device *dev, 344 int value) 345 { 346 if (dev->battery_min < dev->battery_max && 347 value >= dev->battery_min && value <= dev->battery_max) 348 value = ((value - dev->battery_min) * 100) / 349 (dev->battery_max - dev->battery_min); 350 351 return value; 352 } 353 354 static int hidinput_query_battery_capacity(struct hid_device *dev) 355 { 356 u8 *buf; 357 int ret; 358 359 buf = kmalloc(2, GFP_KERNEL); 360 if (!buf) 361 return -ENOMEM; 362 363 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2, 364 dev->battery_report_type, HID_REQ_GET_REPORT); 365 if (ret != 2) { 366 kfree(buf); 367 return -ENODATA; 368 } 369 370 ret = hidinput_scale_battery_capacity(dev, buf[1]); 371 kfree(buf); 372 return ret; 373 } 374 375 static int hidinput_get_battery_property(struct power_supply *psy, 376 enum power_supply_property prop, 377 union power_supply_propval *val) 378 { 379 struct hid_device *dev = power_supply_get_drvdata(psy); 380 int value; 381 int ret = 0; 382 383 switch (prop) { 384 case POWER_SUPPLY_PROP_PRESENT: 385 case POWER_SUPPLY_PROP_ONLINE: 386 val->intval = 1; 387 break; 388 389 case POWER_SUPPLY_PROP_CAPACITY: 390 if (dev->battery_status != HID_BATTERY_REPORTED && 391 !dev->battery_avoid_query) { 392 value = hidinput_query_battery_capacity(dev); 393 if (value < 0) 394 return value; 395 } else { 396 value = dev->battery_capacity; 397 } 398 399 val->intval = value; 400 break; 401 402 case POWER_SUPPLY_PROP_MODEL_NAME: 403 val->strval = dev->name; 404 break; 405 406 case POWER_SUPPLY_PROP_STATUS: 407 if (dev->battery_status != HID_BATTERY_REPORTED && 408 !dev->battery_avoid_query) { 409 value = hidinput_query_battery_capacity(dev); 410 if (value < 0) 411 return value; 412 413 dev->battery_capacity = value; 414 dev->battery_status = HID_BATTERY_QUERIED; 415 } 416 417 if (dev->battery_status == HID_BATTERY_UNKNOWN) 418 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 419 else if (dev->battery_capacity == 100) 420 val->intval = POWER_SUPPLY_STATUS_FULL; 421 else 422 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 423 break; 424 425 case POWER_SUPPLY_PROP_SCOPE: 426 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 427 break; 428 429 default: 430 ret = -EINVAL; 431 break; 432 } 433 434 return ret; 435 } 436 437 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field) 438 { 439 struct power_supply_desc *psy_desc; 440 struct power_supply_config psy_cfg = { .drv_data = dev, }; 441 unsigned quirks; 442 s32 min, max; 443 int error; 444 445 if (dev->battery) 446 return 0; /* already initialized? */ 447 448 quirks = find_battery_quirk(dev); 449 450 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 451 dev->bus, dev->vendor, dev->product, dev->version, quirks); 452 453 if (quirks & HID_BATTERY_QUIRK_IGNORE) 454 return 0; 455 456 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 457 if (!psy_desc) 458 return -ENOMEM; 459 460 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 461 strlen(dev->uniq) ? 462 dev->uniq : dev_name(&dev->dev)); 463 if (!psy_desc->name) { 464 error = -ENOMEM; 465 goto err_free_mem; 466 } 467 468 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 469 psy_desc->properties = hidinput_battery_props; 470 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 471 psy_desc->use_for_apm = 0; 472 psy_desc->get_property = hidinput_get_battery_property; 473 474 min = field->logical_minimum; 475 max = field->logical_maximum; 476 477 if (quirks & HID_BATTERY_QUIRK_PERCENT) { 478 min = 0; 479 max = 100; 480 } 481 482 if (quirks & HID_BATTERY_QUIRK_FEATURE) 483 report_type = HID_FEATURE_REPORT; 484 485 dev->battery_min = min; 486 dev->battery_max = max; 487 dev->battery_report_type = report_type; 488 dev->battery_report_id = field->report->id; 489 490 /* 491 * Stylus is normally not connected to the device and thus we 492 * can't query the device and get meaningful battery strength. 493 * We have to wait for the device to report it on its own. 494 */ 495 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 496 field->physical == HID_DG_STYLUS; 497 498 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 499 if (IS_ERR(dev->battery)) { 500 error = PTR_ERR(dev->battery); 501 hid_warn(dev, "can't register power supply: %d\n", error); 502 goto err_free_name; 503 } 504 505 power_supply_powers(dev->battery, &dev->dev); 506 return 0; 507 508 err_free_name: 509 kfree(psy_desc->name); 510 err_free_mem: 511 kfree(psy_desc); 512 dev->battery = NULL; 513 return error; 514 } 515 516 static void hidinput_cleanup_battery(struct hid_device *dev) 517 { 518 const struct power_supply_desc *psy_desc; 519 520 if (!dev->battery) 521 return; 522 523 psy_desc = dev->battery->desc; 524 power_supply_unregister(dev->battery); 525 kfree(psy_desc->name); 526 kfree(psy_desc); 527 dev->battery = NULL; 528 } 529 530 static void hidinput_update_battery(struct hid_device *dev, int value) 531 { 532 int capacity; 533 534 if (!dev->battery) 535 return; 536 537 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 538 return; 539 540 capacity = hidinput_scale_battery_capacity(dev, value); 541 542 if (dev->battery_status != HID_BATTERY_REPORTED || 543 capacity != dev->battery_capacity) { 544 dev->battery_capacity = capacity; 545 dev->battery_status = HID_BATTERY_REPORTED; 546 power_supply_changed(dev->battery); 547 } 548 } 549 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 550 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 551 struct hid_field *field) 552 { 553 return 0; 554 } 555 556 static void hidinput_cleanup_battery(struct hid_device *dev) 557 { 558 } 559 560 static void hidinput_update_battery(struct hid_device *dev, int value) 561 { 562 } 563 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 564 565 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 566 struct hid_usage *usage) 567 { 568 struct input_dev *input = hidinput->input; 569 struct hid_device *device = input_get_drvdata(input); 570 int max = 0, code; 571 unsigned long *bit = NULL; 572 573 field->hidinput = hidinput; 574 575 if (field->flags & HID_MAIN_ITEM_CONSTANT) 576 goto ignore; 577 578 /* Ignore if report count is out of bounds. */ 579 if (field->report_count < 1) 580 goto ignore; 581 582 /* only LED usages are supported in output fields */ 583 if (field->report_type == HID_OUTPUT_REPORT && 584 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 585 goto ignore; 586 } 587 588 if (device->driver->input_mapping) { 589 int ret = device->driver->input_mapping(device, hidinput, field, 590 usage, &bit, &max); 591 if (ret > 0) 592 goto mapped; 593 if (ret < 0) 594 goto ignore; 595 } 596 597 switch (usage->hid & HID_USAGE_PAGE) { 598 case HID_UP_UNDEFINED: 599 goto ignore; 600 601 case HID_UP_KEYBOARD: 602 set_bit(EV_REP, input->evbit); 603 604 if ((usage->hid & HID_USAGE) < 256) { 605 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 606 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 607 } else 608 map_key(KEY_UNKNOWN); 609 610 break; 611 612 case HID_UP_BUTTON: 613 code = ((usage->hid - 1) & HID_USAGE); 614 615 switch (field->application) { 616 case HID_GD_MOUSE: 617 case HID_GD_POINTER: code += BTN_MOUSE; break; 618 case HID_GD_JOYSTICK: 619 if (code <= 0xf) 620 code += BTN_JOYSTICK; 621 else 622 code += BTN_TRIGGER_HAPPY - 0x10; 623 break; 624 case HID_GD_GAMEPAD: 625 if (code <= 0xf) 626 code += BTN_GAMEPAD; 627 else 628 code += BTN_TRIGGER_HAPPY - 0x10; 629 break; 630 default: 631 switch (field->physical) { 632 case HID_GD_MOUSE: 633 case HID_GD_POINTER: code += BTN_MOUSE; break; 634 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 635 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 636 default: code += BTN_MISC; 637 } 638 } 639 640 map_key(code); 641 break; 642 643 case HID_UP_SIMULATION: 644 switch (usage->hid & 0xffff) { 645 case 0xba: map_abs(ABS_RUDDER); break; 646 case 0xbb: map_abs(ABS_THROTTLE); break; 647 case 0xc4: map_abs(ABS_GAS); break; 648 case 0xc5: map_abs(ABS_BRAKE); break; 649 case 0xc8: map_abs(ABS_WHEEL); break; 650 default: goto ignore; 651 } 652 break; 653 654 case HID_UP_GENDESK: 655 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 656 switch (usage->hid & 0xf) { 657 case 0x1: map_key_clear(KEY_POWER); break; 658 case 0x2: map_key_clear(KEY_SLEEP); break; 659 case 0x3: map_key_clear(KEY_WAKEUP); break; 660 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 661 case 0x5: map_key_clear(KEY_MENU); break; 662 case 0x6: map_key_clear(KEY_PROG1); break; 663 case 0x7: map_key_clear(KEY_HELP); break; 664 case 0x8: map_key_clear(KEY_EXIT); break; 665 case 0x9: map_key_clear(KEY_SELECT); break; 666 case 0xa: map_key_clear(KEY_RIGHT); break; 667 case 0xb: map_key_clear(KEY_LEFT); break; 668 case 0xc: map_key_clear(KEY_UP); break; 669 case 0xd: map_key_clear(KEY_DOWN); break; 670 case 0xe: map_key_clear(KEY_POWER2); break; 671 case 0xf: map_key_clear(KEY_RESTART); break; 672 default: goto unknown; 673 } 674 break; 675 } 676 677 /* 678 * Some lazy vendors declare 255 usages for System Control, 679 * leading to the creation of ABS_X|Y axis and too many others. 680 * It wouldn't be a problem if joydev doesn't consider the 681 * device as a joystick then. 682 */ 683 if (field->application == HID_GD_SYSTEM_CONTROL) 684 goto ignore; 685 686 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 687 switch (usage->hid) { 688 case HID_GD_UP: usage->hat_dir = 1; break; 689 case HID_GD_DOWN: usage->hat_dir = 5; break; 690 case HID_GD_RIGHT: usage->hat_dir = 3; break; 691 case HID_GD_LEFT: usage->hat_dir = 7; break; 692 default: goto unknown; 693 } 694 if (field->dpad) { 695 map_abs(field->dpad); 696 goto ignore; 697 } 698 map_abs(ABS_HAT0X); 699 break; 700 } 701 702 switch (usage->hid) { 703 /* These usage IDs map directly to the usage codes. */ 704 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 705 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 706 if (field->flags & HID_MAIN_ITEM_RELATIVE) 707 map_rel(usage->hid & 0xf); 708 else 709 map_abs_clear(usage->hid & 0xf); 710 break; 711 712 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL: 713 if (field->flags & HID_MAIN_ITEM_RELATIVE) 714 map_rel(usage->hid & 0xf); 715 else 716 map_abs(usage->hid & 0xf); 717 break; 718 719 case HID_GD_HATSWITCH: 720 usage->hat_min = field->logical_minimum; 721 usage->hat_max = field->logical_maximum; 722 map_abs(ABS_HAT0X); 723 break; 724 725 case HID_GD_START: map_key_clear(BTN_START); break; 726 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 727 728 case HID_GD_RFKILL_BTN: 729 /* MS wireless radio ctl extension, also check CA */ 730 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 731 map_key_clear(KEY_RFKILL); 732 /* We need to simulate the btn release */ 733 field->flags |= HID_MAIN_ITEM_RELATIVE; 734 break; 735 } 736 737 default: goto unknown; 738 } 739 740 break; 741 742 case HID_UP_LED: 743 switch (usage->hid & 0xffff) { /* HID-Value: */ 744 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 745 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 746 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 747 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 748 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 749 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 750 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 751 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 752 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 753 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 754 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 755 756 default: goto ignore; 757 } 758 break; 759 760 case HID_UP_DIGITIZER: 761 switch (usage->hid & 0xff) { 762 case 0x00: /* Undefined */ 763 goto ignore; 764 765 case 0x30: /* TipPressure */ 766 if (!test_bit(BTN_TOUCH, input->keybit)) { 767 device->quirks |= HID_QUIRK_NOTOUCH; 768 set_bit(EV_KEY, input->evbit); 769 set_bit(BTN_TOUCH, input->keybit); 770 } 771 map_abs_clear(ABS_PRESSURE); 772 break; 773 774 case 0x32: /* InRange */ 775 switch (field->physical & 0xff) { 776 case 0x21: map_key(BTN_TOOL_MOUSE); break; 777 case 0x22: map_key(BTN_TOOL_FINGER); break; 778 default: map_key(BTN_TOOL_PEN); break; 779 } 780 break; 781 782 case 0x3b: /* Battery Strength */ 783 hidinput_setup_battery(device, HID_INPUT_REPORT, field); 784 usage->type = EV_PWR; 785 goto ignore; 786 787 case 0x3c: /* Invert */ 788 map_key_clear(BTN_TOOL_RUBBER); 789 break; 790 791 case 0x3d: /* X Tilt */ 792 map_abs_clear(ABS_TILT_X); 793 break; 794 795 case 0x3e: /* Y Tilt */ 796 map_abs_clear(ABS_TILT_Y); 797 break; 798 799 case 0x33: /* Touch */ 800 case 0x42: /* TipSwitch */ 801 case 0x43: /* TipSwitch2 */ 802 device->quirks &= ~HID_QUIRK_NOTOUCH; 803 map_key_clear(BTN_TOUCH); 804 break; 805 806 case 0x44: /* BarrelSwitch */ 807 map_key_clear(BTN_STYLUS); 808 break; 809 810 case 0x45: /* ERASER */ 811 /* 812 * This event is reported when eraser tip touches the surface. 813 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 814 * tool gets in proximity. 815 */ 816 map_key_clear(BTN_TOUCH); 817 break; 818 819 case 0x46: /* TabletPick */ 820 case 0x5a: /* SecondaryBarrelSwitch */ 821 map_key_clear(BTN_STYLUS2); 822 break; 823 824 case 0x5b: /* TransducerSerialNumber */ 825 usage->type = EV_MSC; 826 usage->code = MSC_SERIAL; 827 bit = input->mscbit; 828 max = MSC_MAX; 829 break; 830 831 default: goto unknown; 832 } 833 break; 834 835 case HID_UP_TELEPHONY: 836 switch (usage->hid & HID_USAGE) { 837 case 0x2f: map_key_clear(KEY_MICMUTE); break; 838 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 839 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 840 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 841 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 842 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 843 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 844 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 845 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 846 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 847 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 848 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 849 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 850 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 851 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 852 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 853 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 854 default: goto ignore; 855 } 856 break; 857 858 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 859 switch (usage->hid & HID_USAGE) { 860 case 0x000: goto ignore; 861 case 0x030: map_key_clear(KEY_POWER); break; 862 case 0x031: map_key_clear(KEY_RESTART); break; 863 case 0x032: map_key_clear(KEY_SLEEP); break; 864 case 0x034: map_key_clear(KEY_SLEEP); break; 865 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 866 case 0x036: map_key_clear(BTN_MISC); break; 867 868 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 869 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 870 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 871 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 872 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 873 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 874 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 875 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 876 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 877 878 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 879 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 880 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 881 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 882 case 0x069: map_key_clear(KEY_RED); break; 883 case 0x06a: map_key_clear(KEY_GREEN); break; 884 case 0x06b: map_key_clear(KEY_BLUE); break; 885 case 0x06c: map_key_clear(KEY_YELLOW); break; 886 case 0x06d: map_key_clear(KEY_ZOOM); break; 887 888 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 889 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 890 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 891 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 892 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 893 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 894 895 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 896 case 0x083: map_key_clear(KEY_LAST); break; 897 case 0x084: map_key_clear(KEY_ENTER); break; 898 case 0x088: map_key_clear(KEY_PC); break; 899 case 0x089: map_key_clear(KEY_TV); break; 900 case 0x08a: map_key_clear(KEY_WWW); break; 901 case 0x08b: map_key_clear(KEY_DVD); break; 902 case 0x08c: map_key_clear(KEY_PHONE); break; 903 case 0x08d: map_key_clear(KEY_PROGRAM); break; 904 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 905 case 0x08f: map_key_clear(KEY_GAMES); break; 906 case 0x090: map_key_clear(KEY_MEMO); break; 907 case 0x091: map_key_clear(KEY_CD); break; 908 case 0x092: map_key_clear(KEY_VCR); break; 909 case 0x093: map_key_clear(KEY_TUNER); break; 910 case 0x094: map_key_clear(KEY_EXIT); break; 911 case 0x095: map_key_clear(KEY_HELP); break; 912 case 0x096: map_key_clear(KEY_TAPE); break; 913 case 0x097: map_key_clear(KEY_TV2); break; 914 case 0x098: map_key_clear(KEY_SAT); break; 915 case 0x09a: map_key_clear(KEY_PVR); break; 916 917 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 918 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 919 case 0x0a0: map_key_clear(KEY_VCR2); break; 920 921 case 0x0b0: map_key_clear(KEY_PLAY); break; 922 case 0x0b1: map_key_clear(KEY_PAUSE); break; 923 case 0x0b2: map_key_clear(KEY_RECORD); break; 924 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 925 case 0x0b4: map_key_clear(KEY_REWIND); break; 926 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 927 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 928 case 0x0b7: map_key_clear(KEY_STOPCD); break; 929 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 930 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 931 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 932 case 0x0bf: map_key_clear(KEY_SLOW); break; 933 934 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 935 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 936 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 937 case 0x0e2: map_key_clear(KEY_MUTE); break; 938 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 939 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 940 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 941 case 0x0f5: map_key_clear(KEY_SLOW); break; 942 943 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 944 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 945 case 0x183: map_key_clear(KEY_CONFIG); break; 946 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 947 case 0x185: map_key_clear(KEY_EDITOR); break; 948 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 949 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 950 case 0x188: map_key_clear(KEY_PRESENTATION); break; 951 case 0x189: map_key_clear(KEY_DATABASE); break; 952 case 0x18a: map_key_clear(KEY_MAIL); break; 953 case 0x18b: map_key_clear(KEY_NEWS); break; 954 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 955 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 956 case 0x18e: map_key_clear(KEY_CALENDAR); break; 957 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 958 case 0x190: map_key_clear(KEY_JOURNAL); break; 959 case 0x191: map_key_clear(KEY_FINANCE); break; 960 case 0x192: map_key_clear(KEY_CALC); break; 961 case 0x193: map_key_clear(KEY_PLAYER); break; 962 case 0x194: map_key_clear(KEY_FILE); break; 963 case 0x196: map_key_clear(KEY_WWW); break; 964 case 0x199: map_key_clear(KEY_CHAT); break; 965 case 0x19c: map_key_clear(KEY_LOGOFF); break; 966 case 0x19e: map_key_clear(KEY_COFFEE); break; 967 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 968 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 969 case 0x1a3: map_key_clear(KEY_NEXT); break; 970 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 971 case 0x1a6: map_key_clear(KEY_HELP); break; 972 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 973 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 974 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 975 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 976 case 0x1b4: map_key_clear(KEY_FILE); break; 977 case 0x1b6: map_key_clear(KEY_IMAGES); break; 978 case 0x1b7: map_key_clear(KEY_AUDIO); break; 979 case 0x1b8: map_key_clear(KEY_VIDEO); break; 980 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 981 case 0x1bd: map_key_clear(KEY_INFO); break; 982 case 0x201: map_key_clear(KEY_NEW); break; 983 case 0x202: map_key_clear(KEY_OPEN); break; 984 case 0x203: map_key_clear(KEY_CLOSE); break; 985 case 0x204: map_key_clear(KEY_EXIT); break; 986 case 0x207: map_key_clear(KEY_SAVE); break; 987 case 0x208: map_key_clear(KEY_PRINT); break; 988 case 0x209: map_key_clear(KEY_PROPS); break; 989 case 0x21a: map_key_clear(KEY_UNDO); break; 990 case 0x21b: map_key_clear(KEY_COPY); break; 991 case 0x21c: map_key_clear(KEY_CUT); break; 992 case 0x21d: map_key_clear(KEY_PASTE); break; 993 case 0x21f: map_key_clear(KEY_FIND); break; 994 case 0x221: map_key_clear(KEY_SEARCH); break; 995 case 0x222: map_key_clear(KEY_GOTO); break; 996 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 997 case 0x224: map_key_clear(KEY_BACK); break; 998 case 0x225: map_key_clear(KEY_FORWARD); break; 999 case 0x226: map_key_clear(KEY_STOP); break; 1000 case 0x227: map_key_clear(KEY_REFRESH); break; 1001 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1002 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1003 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1004 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1005 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1006 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1007 case 0x238: map_rel(REL_HWHEEL); break; 1008 case 0x23d: map_key_clear(KEY_EDIT); break; 1009 case 0x25f: map_key_clear(KEY_CANCEL); break; 1010 case 0x269: map_key_clear(KEY_INSERT); break; 1011 case 0x26a: map_key_clear(KEY_DELETE); break; 1012 case 0x279: map_key_clear(KEY_REDO); break; 1013 1014 case 0x289: map_key_clear(KEY_REPLY); break; 1015 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1016 case 0x28c: map_key_clear(KEY_SEND); break; 1017 1018 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1019 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1020 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1021 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1022 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1023 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1024 1025 default: map_key_clear(KEY_UNKNOWN); 1026 } 1027 break; 1028 1029 case HID_UP_GENDEVCTRLS: 1030 switch (usage->hid) { 1031 case HID_DC_BATTERYSTRENGTH: 1032 hidinput_setup_battery(device, HID_INPUT_REPORT, field); 1033 usage->type = EV_PWR; 1034 goto ignore; 1035 } 1036 goto unknown; 1037 1038 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1039 set_bit(EV_REP, input->evbit); 1040 switch (usage->hid & HID_USAGE) { 1041 case 0x021: map_key_clear(KEY_PRINT); break; 1042 case 0x070: map_key_clear(KEY_HP); break; 1043 case 0x071: map_key_clear(KEY_CAMERA); break; 1044 case 0x072: map_key_clear(KEY_SOUND); break; 1045 case 0x073: map_key_clear(KEY_QUESTION); break; 1046 case 0x080: map_key_clear(KEY_EMAIL); break; 1047 case 0x081: map_key_clear(KEY_CHAT); break; 1048 case 0x082: map_key_clear(KEY_SEARCH); break; 1049 case 0x083: map_key_clear(KEY_CONNECT); break; 1050 case 0x084: map_key_clear(KEY_FINANCE); break; 1051 case 0x085: map_key_clear(KEY_SPORT); break; 1052 case 0x086: map_key_clear(KEY_SHOP); break; 1053 default: goto ignore; 1054 } 1055 break; 1056 1057 case HID_UP_HPVENDOR2: 1058 set_bit(EV_REP, input->evbit); 1059 switch (usage->hid & HID_USAGE) { 1060 case 0x001: map_key_clear(KEY_MICMUTE); break; 1061 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1062 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1063 default: goto ignore; 1064 } 1065 break; 1066 1067 case HID_UP_MSVENDOR: 1068 goto ignore; 1069 1070 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1071 set_bit(EV_REP, input->evbit); 1072 goto ignore; 1073 1074 case HID_UP_LOGIVENDOR: 1075 /* intentional fallback */ 1076 case HID_UP_LOGIVENDOR2: 1077 /* intentional fallback */ 1078 case HID_UP_LOGIVENDOR3: 1079 goto ignore; 1080 1081 case HID_UP_PID: 1082 switch (usage->hid & HID_USAGE) { 1083 case 0xa4: map_key_clear(BTN_DEAD); break; 1084 default: goto ignore; 1085 } 1086 break; 1087 1088 default: 1089 unknown: 1090 if (field->report_size == 1) { 1091 if (field->report->type == HID_OUTPUT_REPORT) { 1092 map_led(LED_MISC); 1093 break; 1094 } 1095 map_key(BTN_MISC); 1096 break; 1097 } 1098 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1099 map_rel(REL_MISC); 1100 break; 1101 } 1102 map_abs(ABS_MISC); 1103 break; 1104 } 1105 1106 mapped: 1107 if (device->driver->input_mapped && device->driver->input_mapped(device, 1108 hidinput, field, usage, &bit, &max) < 0) 1109 goto ignore; 1110 1111 set_bit(usage->type, input->evbit); 1112 1113 /* 1114 * This part is *really* controversial: 1115 * - HID aims at being generic so we should do our best to export 1116 * all incoming events 1117 * - HID describes what events are, so there is no reason for ABS_X 1118 * to be mapped to ABS_Y 1119 * - HID is using *_MISC+N as a default value, but nothing prevents 1120 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1121 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1122 * processing) 1123 * 1124 * If devices still want to use this (at their own risk), they will 1125 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1126 * the default should be a reliable mapping. 1127 */ 1128 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1129 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1130 usage->code = find_next_zero_bit(bit, 1131 max + 1, 1132 usage->code); 1133 } else { 1134 device->status |= HID_STAT_DUP_DETECTED; 1135 goto ignore; 1136 } 1137 } 1138 1139 if (usage->code > max) 1140 goto ignore; 1141 1142 if (usage->type == EV_ABS) { 1143 1144 int a = field->logical_minimum; 1145 int b = field->logical_maximum; 1146 1147 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1148 a = field->logical_minimum = 0; 1149 b = field->logical_maximum = 255; 1150 } 1151 1152 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1153 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1154 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1155 1156 input_abs_set_res(input, usage->code, 1157 hidinput_calc_abs_res(field, usage->code)); 1158 1159 /* use a larger default input buffer for MT devices */ 1160 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1161 input_set_events_per_packet(input, 60); 1162 } 1163 1164 if (usage->type == EV_ABS && 1165 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1166 int i; 1167 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1168 input_set_abs_params(input, i, -1, 1, 0, 0); 1169 set_bit(i, input->absbit); 1170 } 1171 if (usage->hat_dir && !field->dpad) 1172 field->dpad = usage->code; 1173 } 1174 1175 /* for those devices which produce Consumer volume usage as relative, 1176 * we emulate pressing volumeup/volumedown appropriate number of times 1177 * in hidinput_hid_event() 1178 */ 1179 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1180 (usage->code == ABS_VOLUME)) { 1181 set_bit(KEY_VOLUMEUP, input->keybit); 1182 set_bit(KEY_VOLUMEDOWN, input->keybit); 1183 } 1184 1185 if (usage->type == EV_KEY) { 1186 set_bit(EV_MSC, input->evbit); 1187 set_bit(MSC_SCAN, input->mscbit); 1188 } 1189 1190 ignore: 1191 return; 1192 1193 } 1194 1195 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1196 { 1197 struct input_dev *input; 1198 unsigned *quirks = &hid->quirks; 1199 1200 if (!usage->type) 1201 return; 1202 1203 if (usage->type == EV_PWR) { 1204 hidinput_update_battery(hid, value); 1205 return; 1206 } 1207 1208 if (!field->hidinput) 1209 return; 1210 1211 input = field->hidinput->input; 1212 1213 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1214 int hat_dir = usage->hat_dir; 1215 if (!hat_dir) 1216 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1217 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1218 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1219 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1220 return; 1221 } 1222 1223 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */ 1224 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); 1225 return; 1226 } 1227 1228 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */ 1229 if (value) { 1230 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); 1231 return; 1232 } 1233 input_event(input, usage->type, usage->code, 0); 1234 input_event(input, usage->type, BTN_TOOL_RUBBER, 0); 1235 return; 1236 } 1237 1238 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */ 1239 int a = field->logical_minimum; 1240 int b = field->logical_maximum; 1241 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); 1242 } 1243 1244 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ 1245 dbg_hid("Maximum Effects - %d\n",value); 1246 return; 1247 } 1248 1249 if (usage->hid == (HID_UP_PID | 0x7fUL)) { 1250 dbg_hid("PID Pool Report\n"); 1251 return; 1252 } 1253 1254 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1255 return; 1256 1257 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1258 (usage->code == ABS_VOLUME)) { 1259 int count = abs(value); 1260 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1261 int i; 1262 1263 for (i = 0; i < count; i++) { 1264 input_event(input, EV_KEY, direction, 1); 1265 input_sync(input); 1266 input_event(input, EV_KEY, direction, 0); 1267 input_sync(input); 1268 } 1269 return; 1270 } 1271 1272 /* 1273 * Ignore out-of-range values as per HID specification, 1274 * section 5.10 and 6.2.25, when NULL state bit is present. 1275 * When it's not, clamp the value to match Microsoft's input 1276 * driver as mentioned in "Required HID usages for digitizers": 1277 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1278 * 1279 * The logical_minimum < logical_maximum check is done so that we 1280 * don't unintentionally discard values sent by devices which 1281 * don't specify logical min and max. 1282 */ 1283 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1284 (field->logical_minimum < field->logical_maximum)) { 1285 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1286 (value < field->logical_minimum || 1287 value > field->logical_maximum)) { 1288 dbg_hid("Ignoring out-of-range value %x\n", value); 1289 return; 1290 } 1291 value = clamp(value, 1292 field->logical_minimum, 1293 field->logical_maximum); 1294 } 1295 1296 /* 1297 * Ignore reports for absolute data if the data didn't change. This is 1298 * not only an optimization but also fixes 'dead' key reports. Some 1299 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1300 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1301 * can only have one of them physically available. The 'dead' keys 1302 * report constant 0. As all map to the same keycode, they'd confuse 1303 * the input layer. If we filter the 'dead' keys on the HID level, we 1304 * skip the keycode translation and only forward real events. 1305 */ 1306 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1307 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1308 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1309 usage->usage_index < field->maxusage && 1310 value == field->value[usage->usage_index]) 1311 return; 1312 1313 /* report the usage code as scancode if the key status has changed */ 1314 if (usage->type == EV_KEY && 1315 (!test_bit(usage->code, input->key)) == value) 1316 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1317 1318 input_event(input, usage->type, usage->code, value); 1319 1320 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1321 usage->type == EV_KEY && value) { 1322 input_sync(input); 1323 input_event(input, usage->type, usage->code, 0); 1324 } 1325 } 1326 1327 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1328 { 1329 struct hid_input *hidinput; 1330 1331 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1332 return; 1333 1334 list_for_each_entry(hidinput, &hid->inputs, list) 1335 input_sync(hidinput->input); 1336 } 1337 EXPORT_SYMBOL_GPL(hidinput_report_event); 1338 1339 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field) 1340 { 1341 struct hid_report *report; 1342 int i, j; 1343 1344 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1345 for (i = 0; i < report->maxfield; i++) { 1346 *field = report->field[i]; 1347 for (j = 0; j < (*field)->maxusage; j++) 1348 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1349 return j; 1350 } 1351 } 1352 return -1; 1353 } 1354 EXPORT_SYMBOL_GPL(hidinput_find_field); 1355 1356 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1357 { 1358 struct hid_report *report; 1359 struct hid_field *field; 1360 int i, j; 1361 1362 list_for_each_entry(report, 1363 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1364 list) { 1365 for (i = 0; i < report->maxfield; i++) { 1366 field = report->field[i]; 1367 for (j = 0; j < field->maxusage; j++) 1368 if (field->usage[j].type == EV_LED) 1369 return field; 1370 } 1371 } 1372 return NULL; 1373 } 1374 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1375 1376 unsigned int hidinput_count_leds(struct hid_device *hid) 1377 { 1378 struct hid_report *report; 1379 struct hid_field *field; 1380 int i, j; 1381 unsigned int count = 0; 1382 1383 list_for_each_entry(report, 1384 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1385 list) { 1386 for (i = 0; i < report->maxfield; i++) { 1387 field = report->field[i]; 1388 for (j = 0; j < field->maxusage; j++) 1389 if (field->usage[j].type == EV_LED && 1390 field->value[j]) 1391 count += 1; 1392 } 1393 } 1394 return count; 1395 } 1396 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1397 1398 static void hidinput_led_worker(struct work_struct *work) 1399 { 1400 struct hid_device *hid = container_of(work, struct hid_device, 1401 led_work); 1402 struct hid_field *field; 1403 struct hid_report *report; 1404 int ret; 1405 u32 len; 1406 __u8 *buf; 1407 1408 field = hidinput_get_led_field(hid); 1409 if (!field) 1410 return; 1411 1412 /* 1413 * field->report is accessed unlocked regarding HID core. So there might 1414 * be another incoming SET-LED request from user-space, which changes 1415 * the LED state while we assemble our outgoing buffer. However, this 1416 * doesn't matter as hid_output_report() correctly converts it into a 1417 * boolean value no matter what information is currently set on the LED 1418 * field (even garbage). So the remote device will always get a valid 1419 * request. 1420 * And in case we send a wrong value, a next led worker is spawned 1421 * for every SET-LED request so the following worker will send the 1422 * correct value, guaranteed! 1423 */ 1424 1425 report = field->report; 1426 1427 /* use custom SET_REPORT request if possible (asynchronous) */ 1428 if (hid->ll_driver->request) 1429 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1430 1431 /* fall back to generic raw-output-report */ 1432 len = hid_report_len(report); 1433 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1434 if (!buf) 1435 return; 1436 1437 hid_output_report(report, buf); 1438 /* synchronous output report */ 1439 ret = hid_hw_output_report(hid, buf, len); 1440 if (ret == -ENOSYS) 1441 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1442 HID_REQ_SET_REPORT); 1443 kfree(buf); 1444 } 1445 1446 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1447 unsigned int code, int value) 1448 { 1449 struct hid_device *hid = input_get_drvdata(dev); 1450 struct hid_field *field; 1451 int offset; 1452 1453 if (type == EV_FF) 1454 return input_ff_event(dev, type, code, value); 1455 1456 if (type != EV_LED) 1457 return -1; 1458 1459 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1460 hid_warn(dev, "event field not found\n"); 1461 return -1; 1462 } 1463 1464 hid_set_field(field, offset, value); 1465 1466 schedule_work(&hid->led_work); 1467 return 0; 1468 } 1469 1470 static int hidinput_open(struct input_dev *dev) 1471 { 1472 struct hid_device *hid = input_get_drvdata(dev); 1473 1474 return hid_hw_open(hid); 1475 } 1476 1477 static void hidinput_close(struct input_dev *dev) 1478 { 1479 struct hid_device *hid = input_get_drvdata(dev); 1480 1481 hid_hw_close(hid); 1482 } 1483 1484 static void report_features(struct hid_device *hid) 1485 { 1486 struct hid_driver *drv = hid->driver; 1487 struct hid_report_enum *rep_enum; 1488 struct hid_report *rep; 1489 struct hid_usage *usage; 1490 int i, j; 1491 1492 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1493 list_for_each_entry(rep, &rep_enum->report_list, list) 1494 for (i = 0; i < rep->maxfield; i++) { 1495 /* Ignore if report count is out of bounds. */ 1496 if (rep->field[i]->report_count < 1) 1497 continue; 1498 1499 for (j = 0; j < rep->field[i]->maxusage; j++) { 1500 usage = &rep->field[i]->usage[j]; 1501 1502 /* Verify if Battery Strength feature is available */ 1503 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1504 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1505 rep->field[i]); 1506 1507 if (drv->feature_mapping) 1508 drv->feature_mapping(hid, rep->field[i], usage); 1509 } 1510 } 1511 } 1512 1513 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1514 unsigned int application) 1515 { 1516 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1517 struct input_dev *input_dev = input_allocate_device(); 1518 const char *suffix = NULL; 1519 1520 if (!hidinput || !input_dev) 1521 goto fail; 1522 1523 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1524 hid->maxapplication > 1) { 1525 switch (application) { 1526 case HID_GD_KEYBOARD: 1527 suffix = "Keyboard"; 1528 break; 1529 case HID_GD_KEYPAD: 1530 suffix = "Keypad"; 1531 break; 1532 case HID_GD_MOUSE: 1533 suffix = "Mouse"; 1534 break; 1535 case HID_DG_STYLUS: 1536 suffix = "Pen"; 1537 break; 1538 case HID_DG_TOUCHSCREEN: 1539 suffix = "Touchscreen"; 1540 break; 1541 case HID_DG_TOUCHPAD: 1542 suffix = "Touchpad"; 1543 break; 1544 case HID_GD_SYSTEM_CONTROL: 1545 suffix = "System Control"; 1546 break; 1547 case HID_CP_CONSUMER_CONTROL: 1548 suffix = "Consumer Control"; 1549 break; 1550 case HID_GD_WIRELESS_RADIO_CTLS: 1551 suffix = "Wireless Radio Control"; 1552 break; 1553 default: 1554 break; 1555 } 1556 } 1557 1558 if (suffix) { 1559 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1560 hid->name, suffix); 1561 if (!hidinput->name) 1562 goto fail; 1563 } 1564 1565 input_set_drvdata(input_dev, hid); 1566 input_dev->event = hidinput_input_event; 1567 input_dev->open = hidinput_open; 1568 input_dev->close = hidinput_close; 1569 input_dev->setkeycode = hidinput_setkeycode; 1570 input_dev->getkeycode = hidinput_getkeycode; 1571 1572 input_dev->name = hidinput->name ? hidinput->name : hid->name; 1573 input_dev->phys = hid->phys; 1574 input_dev->uniq = hid->uniq; 1575 input_dev->id.bustype = hid->bus; 1576 input_dev->id.vendor = hid->vendor; 1577 input_dev->id.product = hid->product; 1578 input_dev->id.version = hid->version; 1579 input_dev->dev.parent = &hid->dev; 1580 1581 hidinput->input = input_dev; 1582 list_add_tail(&hidinput->list, &hid->inputs); 1583 1584 INIT_LIST_HEAD(&hidinput->reports); 1585 1586 return hidinput; 1587 1588 fail: 1589 kfree(hidinput); 1590 input_free_device(input_dev); 1591 hid_err(hid, "Out of memory during hid input probe\n"); 1592 return NULL; 1593 } 1594 1595 static bool hidinput_has_been_populated(struct hid_input *hidinput) 1596 { 1597 int i; 1598 unsigned long r = 0; 1599 1600 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 1601 r |= hidinput->input->evbit[i]; 1602 1603 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 1604 r |= hidinput->input->keybit[i]; 1605 1606 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 1607 r |= hidinput->input->relbit[i]; 1608 1609 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 1610 r |= hidinput->input->absbit[i]; 1611 1612 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 1613 r |= hidinput->input->mscbit[i]; 1614 1615 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 1616 r |= hidinput->input->ledbit[i]; 1617 1618 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 1619 r |= hidinput->input->sndbit[i]; 1620 1621 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 1622 r |= hidinput->input->ffbit[i]; 1623 1624 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 1625 r |= hidinput->input->swbit[i]; 1626 1627 return !!r; 1628 } 1629 1630 static void hidinput_cleanup_hidinput(struct hid_device *hid, 1631 struct hid_input *hidinput) 1632 { 1633 struct hid_report *report; 1634 int i, k; 1635 1636 list_del(&hidinput->list); 1637 input_free_device(hidinput->input); 1638 kfree(hidinput->name); 1639 1640 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1641 if (k == HID_OUTPUT_REPORT && 1642 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1643 continue; 1644 1645 list_for_each_entry(report, &hid->report_enum[k].report_list, 1646 list) { 1647 1648 for (i = 0; i < report->maxfield; i++) 1649 if (report->field[i]->hidinput == hidinput) 1650 report->field[i]->hidinput = NULL; 1651 } 1652 } 1653 1654 kfree(hidinput); 1655 } 1656 1657 static struct hid_input *hidinput_match(struct hid_report *report) 1658 { 1659 struct hid_device *hid = report->device; 1660 struct hid_input *hidinput; 1661 1662 list_for_each_entry(hidinput, &hid->inputs, list) { 1663 if (hidinput->report && 1664 hidinput->report->id == report->id) 1665 return hidinput; 1666 } 1667 1668 return NULL; 1669 } 1670 1671 static struct hid_input *hidinput_match_application(struct hid_report *report) 1672 { 1673 struct hid_device *hid = report->device; 1674 struct hid_input *hidinput; 1675 1676 list_for_each_entry(hidinput, &hid->inputs, list) { 1677 if (hidinput->report && 1678 hidinput->report->application == report->application) 1679 return hidinput; 1680 } 1681 1682 return NULL; 1683 } 1684 1685 static inline void hidinput_configure_usages(struct hid_input *hidinput, 1686 struct hid_report *report) 1687 { 1688 int i, j; 1689 1690 for (i = 0; i < report->maxfield; i++) 1691 for (j = 0; j < report->field[i]->maxusage; j++) 1692 hidinput_configure_usage(hidinput, report->field[i], 1693 report->field[i]->usage + j); 1694 } 1695 1696 /* 1697 * Register the input device; print a message. 1698 * Configure the input layer interface 1699 * Read all reports and initialize the absolute field values. 1700 */ 1701 1702 int hidinput_connect(struct hid_device *hid, unsigned int force) 1703 { 1704 struct hid_driver *drv = hid->driver; 1705 struct hid_report *report; 1706 struct hid_input *next, *hidinput = NULL; 1707 unsigned int application; 1708 int i, k; 1709 1710 INIT_LIST_HEAD(&hid->inputs); 1711 INIT_WORK(&hid->led_work, hidinput_led_worker); 1712 1713 hid->status &= ~HID_STAT_DUP_DETECTED; 1714 1715 if (!force) { 1716 for (i = 0; i < hid->maxcollection; i++) { 1717 struct hid_collection *col = &hid->collection[i]; 1718 if (col->type == HID_COLLECTION_APPLICATION || 1719 col->type == HID_COLLECTION_PHYSICAL) 1720 if (IS_INPUT_APPLICATION(col->usage)) 1721 break; 1722 } 1723 1724 if (i == hid->maxcollection) 1725 return -1; 1726 } 1727 1728 report_features(hid); 1729 1730 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1731 if (k == HID_OUTPUT_REPORT && 1732 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1733 continue; 1734 1735 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1736 1737 if (!report->maxfield) 1738 continue; 1739 1740 application = report->application; 1741 1742 /* 1743 * Find the previous hidinput report attached 1744 * to this report id. 1745 */ 1746 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1747 hidinput = hidinput_match(report); 1748 else if (hid->maxapplication > 1 && 1749 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 1750 hidinput = hidinput_match_application(report); 1751 1752 if (!hidinput) { 1753 hidinput = hidinput_allocate(hid, application); 1754 if (!hidinput) 1755 goto out_unwind; 1756 } 1757 1758 hidinput_configure_usages(hidinput, report); 1759 1760 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1761 hidinput->report = report; 1762 1763 list_add_tail(&report->hidinput_list, 1764 &hidinput->reports); 1765 } 1766 } 1767 1768 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1769 if (drv->input_configured && 1770 drv->input_configured(hid, hidinput)) 1771 goto out_unwind; 1772 1773 if (!hidinput_has_been_populated(hidinput)) { 1774 /* no need to register an input device not populated */ 1775 hidinput_cleanup_hidinput(hid, hidinput); 1776 continue; 1777 } 1778 1779 if (input_register_device(hidinput->input)) 1780 goto out_unwind; 1781 hidinput->registered = true; 1782 } 1783 1784 if (list_empty(&hid->inputs)) { 1785 hid_err(hid, "No inputs registered, leaving\n"); 1786 goto out_unwind; 1787 } 1788 1789 if (hid->status & HID_STAT_DUP_DETECTED) 1790 hid_dbg(hid, 1791 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 1792 1793 return 0; 1794 1795 out_unwind: 1796 /* unwind the ones we already registered */ 1797 hidinput_disconnect(hid); 1798 1799 return -1; 1800 } 1801 EXPORT_SYMBOL_GPL(hidinput_connect); 1802 1803 void hidinput_disconnect(struct hid_device *hid) 1804 { 1805 struct hid_input *hidinput, *next; 1806 1807 hidinput_cleanup_battery(hid); 1808 1809 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1810 list_del(&hidinput->list); 1811 if (hidinput->registered) 1812 input_unregister_device(hidinput->input); 1813 else 1814 input_free_device(hidinput->input); 1815 kfree(hidinput); 1816 } 1817 1818 /* led_work is spawned by input_dev callbacks, but doesn't access the 1819 * parent input_dev at all. Once all input devices are removed, we 1820 * know that led_work will never get restarted, so we can cancel it 1821 * synchronously and are safe. */ 1822 cancel_work_sync(&hid->led_work); 1823 } 1824 EXPORT_SYMBOL_GPL(hidinput_disconnect); 1825 1826