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 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 329 USB_DEVICE_ID_SYMBOL_SCANNER_3), 330 HID_BATTERY_QUIRK_IGNORE }, 331 {} 332 }; 333 334 static unsigned find_battery_quirk(struct hid_device *hdev) 335 { 336 unsigned quirks = 0; 337 const struct hid_device_id *match; 338 339 match = hid_match_id(hdev, hid_battery_quirks); 340 if (match != NULL) 341 quirks = match->driver_data; 342 343 return quirks; 344 } 345 346 static int hidinput_scale_battery_capacity(struct hid_device *dev, 347 int value) 348 { 349 if (dev->battery_min < dev->battery_max && 350 value >= dev->battery_min && value <= dev->battery_max) 351 value = ((value - dev->battery_min) * 100) / 352 (dev->battery_max - dev->battery_min); 353 354 return value; 355 } 356 357 static int hidinput_query_battery_capacity(struct hid_device *dev) 358 { 359 u8 *buf; 360 int ret; 361 362 buf = kmalloc(2, GFP_KERNEL); 363 if (!buf) 364 return -ENOMEM; 365 366 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2, 367 dev->battery_report_type, HID_REQ_GET_REPORT); 368 if (ret != 2) { 369 kfree(buf); 370 return -ENODATA; 371 } 372 373 ret = hidinput_scale_battery_capacity(dev, buf[1]); 374 kfree(buf); 375 return ret; 376 } 377 378 static int hidinput_get_battery_property(struct power_supply *psy, 379 enum power_supply_property prop, 380 union power_supply_propval *val) 381 { 382 struct hid_device *dev = power_supply_get_drvdata(psy); 383 int value; 384 int ret = 0; 385 386 switch (prop) { 387 case POWER_SUPPLY_PROP_PRESENT: 388 case POWER_SUPPLY_PROP_ONLINE: 389 val->intval = 1; 390 break; 391 392 case POWER_SUPPLY_PROP_CAPACITY: 393 if (dev->battery_status != HID_BATTERY_REPORTED && 394 !dev->battery_avoid_query) { 395 value = hidinput_query_battery_capacity(dev); 396 if (value < 0) 397 return value; 398 } else { 399 value = dev->battery_capacity; 400 } 401 402 val->intval = value; 403 break; 404 405 case POWER_SUPPLY_PROP_MODEL_NAME: 406 val->strval = dev->name; 407 break; 408 409 case POWER_SUPPLY_PROP_STATUS: 410 if (dev->battery_status != HID_BATTERY_REPORTED && 411 !dev->battery_avoid_query) { 412 value = hidinput_query_battery_capacity(dev); 413 if (value < 0) 414 return value; 415 416 dev->battery_capacity = value; 417 dev->battery_status = HID_BATTERY_QUERIED; 418 } 419 420 if (dev->battery_status == HID_BATTERY_UNKNOWN) 421 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 422 else if (dev->battery_capacity == 100) 423 val->intval = POWER_SUPPLY_STATUS_FULL; 424 else 425 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 426 break; 427 428 case POWER_SUPPLY_PROP_SCOPE: 429 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 430 break; 431 432 default: 433 ret = -EINVAL; 434 break; 435 } 436 437 return ret; 438 } 439 440 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field) 441 { 442 struct power_supply_desc *psy_desc; 443 struct power_supply_config psy_cfg = { .drv_data = dev, }; 444 unsigned quirks; 445 s32 min, max; 446 int error; 447 448 if (dev->battery) 449 return 0; /* already initialized? */ 450 451 quirks = find_battery_quirk(dev); 452 453 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 454 dev->bus, dev->vendor, dev->product, dev->version, quirks); 455 456 if (quirks & HID_BATTERY_QUIRK_IGNORE) 457 return 0; 458 459 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 460 if (!psy_desc) 461 return -ENOMEM; 462 463 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 464 strlen(dev->uniq) ? 465 dev->uniq : dev_name(&dev->dev)); 466 if (!psy_desc->name) { 467 error = -ENOMEM; 468 goto err_free_mem; 469 } 470 471 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 472 psy_desc->properties = hidinput_battery_props; 473 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 474 psy_desc->use_for_apm = 0; 475 psy_desc->get_property = hidinput_get_battery_property; 476 477 min = field->logical_minimum; 478 max = field->logical_maximum; 479 480 if (quirks & HID_BATTERY_QUIRK_PERCENT) { 481 min = 0; 482 max = 100; 483 } 484 485 if (quirks & HID_BATTERY_QUIRK_FEATURE) 486 report_type = HID_FEATURE_REPORT; 487 488 dev->battery_min = min; 489 dev->battery_max = max; 490 dev->battery_report_type = report_type; 491 dev->battery_report_id = field->report->id; 492 493 /* 494 * Stylus is normally not connected to the device and thus we 495 * can't query the device and get meaningful battery strength. 496 * We have to wait for the device to report it on its own. 497 */ 498 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 499 field->physical == HID_DG_STYLUS; 500 501 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 502 if (IS_ERR(dev->battery)) { 503 error = PTR_ERR(dev->battery); 504 hid_warn(dev, "can't register power supply: %d\n", error); 505 goto err_free_name; 506 } 507 508 power_supply_powers(dev->battery, &dev->dev); 509 return 0; 510 511 err_free_name: 512 kfree(psy_desc->name); 513 err_free_mem: 514 kfree(psy_desc); 515 dev->battery = NULL; 516 return error; 517 } 518 519 static void hidinput_cleanup_battery(struct hid_device *dev) 520 { 521 const struct power_supply_desc *psy_desc; 522 523 if (!dev->battery) 524 return; 525 526 psy_desc = dev->battery->desc; 527 power_supply_unregister(dev->battery); 528 kfree(psy_desc->name); 529 kfree(psy_desc); 530 dev->battery = NULL; 531 } 532 533 static void hidinput_update_battery(struct hid_device *dev, int value) 534 { 535 int capacity; 536 537 if (!dev->battery) 538 return; 539 540 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 541 return; 542 543 capacity = hidinput_scale_battery_capacity(dev, value); 544 545 if (dev->battery_status != HID_BATTERY_REPORTED || 546 capacity != dev->battery_capacity) { 547 dev->battery_capacity = capacity; 548 dev->battery_status = HID_BATTERY_REPORTED; 549 power_supply_changed(dev->battery); 550 } 551 } 552 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 553 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 554 struct hid_field *field) 555 { 556 return 0; 557 } 558 559 static void hidinput_cleanup_battery(struct hid_device *dev) 560 { 561 } 562 563 static void hidinput_update_battery(struct hid_device *dev, int value) 564 { 565 } 566 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 567 568 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 569 struct hid_usage *usage) 570 { 571 struct input_dev *input = hidinput->input; 572 struct hid_device *device = input_get_drvdata(input); 573 int max = 0, code; 574 unsigned long *bit = NULL; 575 576 field->hidinput = hidinput; 577 578 if (field->flags & HID_MAIN_ITEM_CONSTANT) 579 goto ignore; 580 581 /* Ignore if report count is out of bounds. */ 582 if (field->report_count < 1) 583 goto ignore; 584 585 /* only LED usages are supported in output fields */ 586 if (field->report_type == HID_OUTPUT_REPORT && 587 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 588 goto ignore; 589 } 590 591 if (device->driver->input_mapping) { 592 int ret = device->driver->input_mapping(device, hidinput, field, 593 usage, &bit, &max); 594 if (ret > 0) 595 goto mapped; 596 if (ret < 0) 597 goto ignore; 598 } 599 600 switch (usage->hid & HID_USAGE_PAGE) { 601 case HID_UP_UNDEFINED: 602 goto ignore; 603 604 case HID_UP_KEYBOARD: 605 set_bit(EV_REP, input->evbit); 606 607 if ((usage->hid & HID_USAGE) < 256) { 608 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 609 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 610 } else 611 map_key(KEY_UNKNOWN); 612 613 break; 614 615 case HID_UP_BUTTON: 616 code = ((usage->hid - 1) & HID_USAGE); 617 618 switch (field->application) { 619 case HID_GD_MOUSE: 620 case HID_GD_POINTER: code += BTN_MOUSE; break; 621 case HID_GD_JOYSTICK: 622 if (code <= 0xf) 623 code += BTN_JOYSTICK; 624 else 625 code += BTN_TRIGGER_HAPPY - 0x10; 626 break; 627 case HID_GD_GAMEPAD: 628 if (code <= 0xf) 629 code += BTN_GAMEPAD; 630 else 631 code += BTN_TRIGGER_HAPPY - 0x10; 632 break; 633 default: 634 switch (field->physical) { 635 case HID_GD_MOUSE: 636 case HID_GD_POINTER: code += BTN_MOUSE; break; 637 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 638 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 639 default: code += BTN_MISC; 640 } 641 } 642 643 map_key(code); 644 break; 645 646 case HID_UP_SIMULATION: 647 switch (usage->hid & 0xffff) { 648 case 0xba: map_abs(ABS_RUDDER); break; 649 case 0xbb: map_abs(ABS_THROTTLE); break; 650 case 0xc4: map_abs(ABS_GAS); break; 651 case 0xc5: map_abs(ABS_BRAKE); break; 652 case 0xc8: map_abs(ABS_WHEEL); break; 653 default: goto ignore; 654 } 655 break; 656 657 case HID_UP_GENDESK: 658 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 659 switch (usage->hid & 0xf) { 660 case 0x1: map_key_clear(KEY_POWER); break; 661 case 0x2: map_key_clear(KEY_SLEEP); break; 662 case 0x3: map_key_clear(KEY_WAKEUP); break; 663 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 664 case 0x5: map_key_clear(KEY_MENU); break; 665 case 0x6: map_key_clear(KEY_PROG1); break; 666 case 0x7: map_key_clear(KEY_HELP); break; 667 case 0x8: map_key_clear(KEY_EXIT); break; 668 case 0x9: map_key_clear(KEY_SELECT); break; 669 case 0xa: map_key_clear(KEY_RIGHT); break; 670 case 0xb: map_key_clear(KEY_LEFT); break; 671 case 0xc: map_key_clear(KEY_UP); break; 672 case 0xd: map_key_clear(KEY_DOWN); break; 673 case 0xe: map_key_clear(KEY_POWER2); break; 674 case 0xf: map_key_clear(KEY_RESTART); break; 675 default: goto unknown; 676 } 677 break; 678 } 679 680 /* 681 * Some lazy vendors declare 255 usages for System Control, 682 * leading to the creation of ABS_X|Y axis and too many others. 683 * It wouldn't be a problem if joydev doesn't consider the 684 * device as a joystick then. 685 */ 686 if (field->application == HID_GD_SYSTEM_CONTROL) 687 goto ignore; 688 689 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 690 switch (usage->hid) { 691 case HID_GD_UP: usage->hat_dir = 1; break; 692 case HID_GD_DOWN: usage->hat_dir = 5; break; 693 case HID_GD_RIGHT: usage->hat_dir = 3; break; 694 case HID_GD_LEFT: usage->hat_dir = 7; break; 695 default: goto unknown; 696 } 697 if (field->dpad) { 698 map_abs(field->dpad); 699 goto ignore; 700 } 701 map_abs(ABS_HAT0X); 702 break; 703 } 704 705 switch (usage->hid) { 706 /* These usage IDs map directly to the usage codes. */ 707 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 708 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 709 if (field->flags & HID_MAIN_ITEM_RELATIVE) 710 map_rel(usage->hid & 0xf); 711 else 712 map_abs_clear(usage->hid & 0xf); 713 break; 714 715 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL: 716 if (field->flags & HID_MAIN_ITEM_RELATIVE) 717 map_rel(usage->hid & 0xf); 718 else 719 map_abs(usage->hid & 0xf); 720 break; 721 722 case HID_GD_HATSWITCH: 723 usage->hat_min = field->logical_minimum; 724 usage->hat_max = field->logical_maximum; 725 map_abs(ABS_HAT0X); 726 break; 727 728 case HID_GD_START: map_key_clear(BTN_START); break; 729 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 730 731 case HID_GD_RFKILL_BTN: 732 /* MS wireless radio ctl extension, also check CA */ 733 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 734 map_key_clear(KEY_RFKILL); 735 /* We need to simulate the btn release */ 736 field->flags |= HID_MAIN_ITEM_RELATIVE; 737 break; 738 } 739 740 default: goto unknown; 741 } 742 743 break; 744 745 case HID_UP_LED: 746 switch (usage->hid & 0xffff) { /* HID-Value: */ 747 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 748 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 749 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 750 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 751 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 752 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 753 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 754 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 755 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 756 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 757 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 758 759 default: goto ignore; 760 } 761 break; 762 763 case HID_UP_DIGITIZER: 764 if ((field->application & 0xff) == 0x01) /* Digitizer */ 765 __set_bit(INPUT_PROP_POINTER, input->propbit); 766 else if ((field->application & 0xff) == 0x02) /* Pen */ 767 __set_bit(INPUT_PROP_DIRECT, input->propbit); 768 769 switch (usage->hid & 0xff) { 770 case 0x00: /* Undefined */ 771 goto ignore; 772 773 case 0x30: /* TipPressure */ 774 if (!test_bit(BTN_TOUCH, input->keybit)) { 775 device->quirks |= HID_QUIRK_NOTOUCH; 776 set_bit(EV_KEY, input->evbit); 777 set_bit(BTN_TOUCH, input->keybit); 778 } 779 map_abs_clear(ABS_PRESSURE); 780 break; 781 782 case 0x32: /* InRange */ 783 switch (field->physical & 0xff) { 784 case 0x21: map_key(BTN_TOOL_MOUSE); break; 785 case 0x22: map_key(BTN_TOOL_FINGER); break; 786 default: map_key(BTN_TOOL_PEN); break; 787 } 788 break; 789 790 case 0x3b: /* Battery Strength */ 791 hidinput_setup_battery(device, HID_INPUT_REPORT, field); 792 usage->type = EV_PWR; 793 goto ignore; 794 795 case 0x3c: /* Invert */ 796 map_key_clear(BTN_TOOL_RUBBER); 797 break; 798 799 case 0x3d: /* X Tilt */ 800 map_abs_clear(ABS_TILT_X); 801 break; 802 803 case 0x3e: /* Y Tilt */ 804 map_abs_clear(ABS_TILT_Y); 805 break; 806 807 case 0x33: /* Touch */ 808 case 0x42: /* TipSwitch */ 809 case 0x43: /* TipSwitch2 */ 810 device->quirks &= ~HID_QUIRK_NOTOUCH; 811 map_key_clear(BTN_TOUCH); 812 break; 813 814 case 0x44: /* BarrelSwitch */ 815 map_key_clear(BTN_STYLUS); 816 break; 817 818 case 0x45: /* ERASER */ 819 /* 820 * This event is reported when eraser tip touches the surface. 821 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 822 * tool gets in proximity. 823 */ 824 map_key_clear(BTN_TOUCH); 825 break; 826 827 case 0x46: /* TabletPick */ 828 case 0x5a: /* SecondaryBarrelSwitch */ 829 map_key_clear(BTN_STYLUS2); 830 break; 831 832 case 0x5b: /* TransducerSerialNumber */ 833 usage->type = EV_MSC; 834 usage->code = MSC_SERIAL; 835 bit = input->mscbit; 836 max = MSC_MAX; 837 break; 838 839 default: goto unknown; 840 } 841 break; 842 843 case HID_UP_TELEPHONY: 844 switch (usage->hid & HID_USAGE) { 845 case 0x2f: map_key_clear(KEY_MICMUTE); break; 846 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 847 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 848 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 849 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 850 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 851 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 852 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 853 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 854 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 855 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 856 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 857 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 858 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 859 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 860 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 861 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 862 default: goto ignore; 863 } 864 break; 865 866 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 867 switch (usage->hid & HID_USAGE) { 868 case 0x000: goto ignore; 869 case 0x030: map_key_clear(KEY_POWER); break; 870 case 0x031: map_key_clear(KEY_RESTART); break; 871 case 0x032: map_key_clear(KEY_SLEEP); break; 872 case 0x034: map_key_clear(KEY_SLEEP); break; 873 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 874 case 0x036: map_key_clear(BTN_MISC); break; 875 876 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 877 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 878 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 879 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 880 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 881 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 882 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 883 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 884 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 885 886 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 887 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 888 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 889 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 890 case 0x069: map_key_clear(KEY_RED); break; 891 case 0x06a: map_key_clear(KEY_GREEN); break; 892 case 0x06b: map_key_clear(KEY_BLUE); break; 893 case 0x06c: map_key_clear(KEY_YELLOW); break; 894 case 0x06d: map_key_clear(KEY_ZOOM); break; 895 896 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 897 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 898 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 899 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 900 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 901 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 902 903 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 904 case 0x083: map_key_clear(KEY_LAST); break; 905 case 0x084: map_key_clear(KEY_ENTER); break; 906 case 0x088: map_key_clear(KEY_PC); break; 907 case 0x089: map_key_clear(KEY_TV); break; 908 case 0x08a: map_key_clear(KEY_WWW); break; 909 case 0x08b: map_key_clear(KEY_DVD); break; 910 case 0x08c: map_key_clear(KEY_PHONE); break; 911 case 0x08d: map_key_clear(KEY_PROGRAM); break; 912 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 913 case 0x08f: map_key_clear(KEY_GAMES); break; 914 case 0x090: map_key_clear(KEY_MEMO); break; 915 case 0x091: map_key_clear(KEY_CD); break; 916 case 0x092: map_key_clear(KEY_VCR); break; 917 case 0x093: map_key_clear(KEY_TUNER); break; 918 case 0x094: map_key_clear(KEY_EXIT); break; 919 case 0x095: map_key_clear(KEY_HELP); break; 920 case 0x096: map_key_clear(KEY_TAPE); break; 921 case 0x097: map_key_clear(KEY_TV2); break; 922 case 0x098: map_key_clear(KEY_SAT); break; 923 case 0x09a: map_key_clear(KEY_PVR); break; 924 925 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 926 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 927 case 0x0a0: map_key_clear(KEY_VCR2); break; 928 929 case 0x0b0: map_key_clear(KEY_PLAY); break; 930 case 0x0b1: map_key_clear(KEY_PAUSE); break; 931 case 0x0b2: map_key_clear(KEY_RECORD); break; 932 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 933 case 0x0b4: map_key_clear(KEY_REWIND); break; 934 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 935 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 936 case 0x0b7: map_key_clear(KEY_STOPCD); break; 937 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 938 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 939 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 940 case 0x0bf: map_key_clear(KEY_SLOW); break; 941 942 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 943 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 944 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 945 case 0x0e2: map_key_clear(KEY_MUTE); break; 946 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 947 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 948 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 949 case 0x0f5: map_key_clear(KEY_SLOW); break; 950 951 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 952 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 953 case 0x183: map_key_clear(KEY_CONFIG); break; 954 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 955 case 0x185: map_key_clear(KEY_EDITOR); break; 956 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 957 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 958 case 0x188: map_key_clear(KEY_PRESENTATION); break; 959 case 0x189: map_key_clear(KEY_DATABASE); break; 960 case 0x18a: map_key_clear(KEY_MAIL); break; 961 case 0x18b: map_key_clear(KEY_NEWS); break; 962 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 963 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 964 case 0x18e: map_key_clear(KEY_CALENDAR); break; 965 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 966 case 0x190: map_key_clear(KEY_JOURNAL); break; 967 case 0x191: map_key_clear(KEY_FINANCE); break; 968 case 0x192: map_key_clear(KEY_CALC); break; 969 case 0x193: map_key_clear(KEY_PLAYER); break; 970 case 0x194: map_key_clear(KEY_FILE); break; 971 case 0x196: map_key_clear(KEY_WWW); break; 972 case 0x199: map_key_clear(KEY_CHAT); break; 973 case 0x19c: map_key_clear(KEY_LOGOFF); break; 974 case 0x19e: map_key_clear(KEY_COFFEE); break; 975 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 976 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 977 case 0x1a3: map_key_clear(KEY_NEXT); break; 978 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 979 case 0x1a6: map_key_clear(KEY_HELP); break; 980 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 981 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 982 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 983 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 984 case 0x1b4: map_key_clear(KEY_FILE); break; 985 case 0x1b6: map_key_clear(KEY_IMAGES); break; 986 case 0x1b7: map_key_clear(KEY_AUDIO); break; 987 case 0x1b8: map_key_clear(KEY_VIDEO); break; 988 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 989 case 0x1bd: map_key_clear(KEY_INFO); break; 990 case 0x201: map_key_clear(KEY_NEW); break; 991 case 0x202: map_key_clear(KEY_OPEN); break; 992 case 0x203: map_key_clear(KEY_CLOSE); break; 993 case 0x204: map_key_clear(KEY_EXIT); break; 994 case 0x207: map_key_clear(KEY_SAVE); break; 995 case 0x208: map_key_clear(KEY_PRINT); break; 996 case 0x209: map_key_clear(KEY_PROPS); break; 997 case 0x21a: map_key_clear(KEY_UNDO); break; 998 case 0x21b: map_key_clear(KEY_COPY); break; 999 case 0x21c: map_key_clear(KEY_CUT); break; 1000 case 0x21d: map_key_clear(KEY_PASTE); break; 1001 case 0x21f: map_key_clear(KEY_FIND); break; 1002 case 0x221: map_key_clear(KEY_SEARCH); break; 1003 case 0x222: map_key_clear(KEY_GOTO); break; 1004 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1005 case 0x224: map_key_clear(KEY_BACK); break; 1006 case 0x225: map_key_clear(KEY_FORWARD); break; 1007 case 0x226: map_key_clear(KEY_STOP); break; 1008 case 0x227: map_key_clear(KEY_REFRESH); break; 1009 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1010 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1011 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1012 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1013 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1014 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1015 case 0x238: map_rel(REL_HWHEEL); break; 1016 case 0x23d: map_key_clear(KEY_EDIT); break; 1017 case 0x25f: map_key_clear(KEY_CANCEL); break; 1018 case 0x269: map_key_clear(KEY_INSERT); break; 1019 case 0x26a: map_key_clear(KEY_DELETE); break; 1020 case 0x279: map_key_clear(KEY_REDO); break; 1021 1022 case 0x289: map_key_clear(KEY_REPLY); break; 1023 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1024 case 0x28c: map_key_clear(KEY_SEND); break; 1025 1026 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1027 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1028 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1029 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1030 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1031 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1032 1033 default: map_key_clear(KEY_UNKNOWN); 1034 } 1035 break; 1036 1037 case HID_UP_GENDEVCTRLS: 1038 switch (usage->hid) { 1039 case HID_DC_BATTERYSTRENGTH: 1040 hidinput_setup_battery(device, HID_INPUT_REPORT, field); 1041 usage->type = EV_PWR; 1042 goto ignore; 1043 } 1044 goto unknown; 1045 1046 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1047 set_bit(EV_REP, input->evbit); 1048 switch (usage->hid & HID_USAGE) { 1049 case 0x021: map_key_clear(KEY_PRINT); break; 1050 case 0x070: map_key_clear(KEY_HP); break; 1051 case 0x071: map_key_clear(KEY_CAMERA); break; 1052 case 0x072: map_key_clear(KEY_SOUND); break; 1053 case 0x073: map_key_clear(KEY_QUESTION); break; 1054 case 0x080: map_key_clear(KEY_EMAIL); break; 1055 case 0x081: map_key_clear(KEY_CHAT); break; 1056 case 0x082: map_key_clear(KEY_SEARCH); break; 1057 case 0x083: map_key_clear(KEY_CONNECT); break; 1058 case 0x084: map_key_clear(KEY_FINANCE); break; 1059 case 0x085: map_key_clear(KEY_SPORT); break; 1060 case 0x086: map_key_clear(KEY_SHOP); break; 1061 default: goto ignore; 1062 } 1063 break; 1064 1065 case HID_UP_HPVENDOR2: 1066 set_bit(EV_REP, input->evbit); 1067 switch (usage->hid & HID_USAGE) { 1068 case 0x001: map_key_clear(KEY_MICMUTE); break; 1069 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1070 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1071 default: goto ignore; 1072 } 1073 break; 1074 1075 case HID_UP_MSVENDOR: 1076 goto ignore; 1077 1078 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1079 set_bit(EV_REP, input->evbit); 1080 goto ignore; 1081 1082 case HID_UP_LOGIVENDOR: 1083 /* intentional fallback */ 1084 case HID_UP_LOGIVENDOR2: 1085 /* intentional fallback */ 1086 case HID_UP_LOGIVENDOR3: 1087 goto ignore; 1088 1089 case HID_UP_PID: 1090 switch (usage->hid & HID_USAGE) { 1091 case 0xa4: map_key_clear(BTN_DEAD); break; 1092 default: goto ignore; 1093 } 1094 break; 1095 1096 default: 1097 unknown: 1098 if (field->report_size == 1) { 1099 if (field->report->type == HID_OUTPUT_REPORT) { 1100 map_led(LED_MISC); 1101 break; 1102 } 1103 map_key(BTN_MISC); 1104 break; 1105 } 1106 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1107 map_rel(REL_MISC); 1108 break; 1109 } 1110 map_abs(ABS_MISC); 1111 break; 1112 } 1113 1114 mapped: 1115 if (device->driver->input_mapped && device->driver->input_mapped(device, 1116 hidinput, field, usage, &bit, &max) < 0) 1117 goto ignore; 1118 1119 set_bit(usage->type, input->evbit); 1120 1121 /* 1122 * This part is *really* controversial: 1123 * - HID aims at being generic so we should do our best to export 1124 * all incoming events 1125 * - HID describes what events are, so there is no reason for ABS_X 1126 * to be mapped to ABS_Y 1127 * - HID is using *_MISC+N as a default value, but nothing prevents 1128 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1129 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1130 * processing) 1131 * 1132 * If devices still want to use this (at their own risk), they will 1133 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1134 * the default should be a reliable mapping. 1135 */ 1136 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1137 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1138 usage->code = find_next_zero_bit(bit, 1139 max + 1, 1140 usage->code); 1141 } else { 1142 device->status |= HID_STAT_DUP_DETECTED; 1143 goto ignore; 1144 } 1145 } 1146 1147 if (usage->code > max) 1148 goto ignore; 1149 1150 if (usage->type == EV_ABS) { 1151 1152 int a = field->logical_minimum; 1153 int b = field->logical_maximum; 1154 1155 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1156 a = field->logical_minimum = 0; 1157 b = field->logical_maximum = 255; 1158 } 1159 1160 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1161 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1162 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1163 1164 input_abs_set_res(input, usage->code, 1165 hidinput_calc_abs_res(field, usage->code)); 1166 1167 /* use a larger default input buffer for MT devices */ 1168 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1169 input_set_events_per_packet(input, 60); 1170 } 1171 1172 if (usage->type == EV_ABS && 1173 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1174 int i; 1175 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1176 input_set_abs_params(input, i, -1, 1, 0, 0); 1177 set_bit(i, input->absbit); 1178 } 1179 if (usage->hat_dir && !field->dpad) 1180 field->dpad = usage->code; 1181 } 1182 1183 /* for those devices which produce Consumer volume usage as relative, 1184 * we emulate pressing volumeup/volumedown appropriate number of times 1185 * in hidinput_hid_event() 1186 */ 1187 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1188 (usage->code == ABS_VOLUME)) { 1189 set_bit(KEY_VOLUMEUP, input->keybit); 1190 set_bit(KEY_VOLUMEDOWN, input->keybit); 1191 } 1192 1193 if (usage->type == EV_KEY) { 1194 set_bit(EV_MSC, input->evbit); 1195 set_bit(MSC_SCAN, input->mscbit); 1196 } 1197 1198 ignore: 1199 return; 1200 1201 } 1202 1203 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1204 { 1205 struct input_dev *input; 1206 unsigned *quirks = &hid->quirks; 1207 1208 if (!usage->type) 1209 return; 1210 1211 if (usage->type == EV_PWR) { 1212 hidinput_update_battery(hid, value); 1213 return; 1214 } 1215 1216 if (!field->hidinput) 1217 return; 1218 1219 input = field->hidinput->input; 1220 1221 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1222 int hat_dir = usage->hat_dir; 1223 if (!hat_dir) 1224 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1225 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1226 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1227 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1228 return; 1229 } 1230 1231 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */ 1232 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); 1233 return; 1234 } 1235 1236 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */ 1237 if (value) { 1238 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); 1239 return; 1240 } 1241 input_event(input, usage->type, usage->code, 0); 1242 input_event(input, usage->type, BTN_TOOL_RUBBER, 0); 1243 return; 1244 } 1245 1246 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */ 1247 int a = field->logical_minimum; 1248 int b = field->logical_maximum; 1249 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); 1250 } 1251 1252 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ 1253 dbg_hid("Maximum Effects - %d\n",value); 1254 return; 1255 } 1256 1257 if (usage->hid == (HID_UP_PID | 0x7fUL)) { 1258 dbg_hid("PID Pool Report\n"); 1259 return; 1260 } 1261 1262 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1263 return; 1264 1265 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1266 (usage->code == ABS_VOLUME)) { 1267 int count = abs(value); 1268 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1269 int i; 1270 1271 for (i = 0; i < count; i++) { 1272 input_event(input, EV_KEY, direction, 1); 1273 input_sync(input); 1274 input_event(input, EV_KEY, direction, 0); 1275 input_sync(input); 1276 } 1277 return; 1278 } 1279 1280 /* 1281 * Ignore out-of-range values as per HID specification, 1282 * section 5.10 and 6.2.25, when NULL state bit is present. 1283 * When it's not, clamp the value to match Microsoft's input 1284 * driver as mentioned in "Required HID usages for digitizers": 1285 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1286 * 1287 * The logical_minimum < logical_maximum check is done so that we 1288 * don't unintentionally discard values sent by devices which 1289 * don't specify logical min and max. 1290 */ 1291 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1292 (field->logical_minimum < field->logical_maximum)) { 1293 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1294 (value < field->logical_minimum || 1295 value > field->logical_maximum)) { 1296 dbg_hid("Ignoring out-of-range value %x\n", value); 1297 return; 1298 } 1299 value = clamp(value, 1300 field->logical_minimum, 1301 field->logical_maximum); 1302 } 1303 1304 /* 1305 * Ignore reports for absolute data if the data didn't change. This is 1306 * not only an optimization but also fixes 'dead' key reports. Some 1307 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1308 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1309 * can only have one of them physically available. The 'dead' keys 1310 * report constant 0. As all map to the same keycode, they'd confuse 1311 * the input layer. If we filter the 'dead' keys on the HID level, we 1312 * skip the keycode translation and only forward real events. 1313 */ 1314 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1315 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1316 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1317 usage->usage_index < field->maxusage && 1318 value == field->value[usage->usage_index]) 1319 return; 1320 1321 /* report the usage code as scancode if the key status has changed */ 1322 if (usage->type == EV_KEY && 1323 (!test_bit(usage->code, input->key)) == value) 1324 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1325 1326 input_event(input, usage->type, usage->code, value); 1327 1328 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1329 usage->type == EV_KEY && value) { 1330 input_sync(input); 1331 input_event(input, usage->type, usage->code, 0); 1332 } 1333 } 1334 1335 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1336 { 1337 struct hid_input *hidinput; 1338 1339 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1340 return; 1341 1342 list_for_each_entry(hidinput, &hid->inputs, list) 1343 input_sync(hidinput->input); 1344 } 1345 EXPORT_SYMBOL_GPL(hidinput_report_event); 1346 1347 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field) 1348 { 1349 struct hid_report *report; 1350 int i, j; 1351 1352 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1353 for (i = 0; i < report->maxfield; i++) { 1354 *field = report->field[i]; 1355 for (j = 0; j < (*field)->maxusage; j++) 1356 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1357 return j; 1358 } 1359 } 1360 return -1; 1361 } 1362 EXPORT_SYMBOL_GPL(hidinput_find_field); 1363 1364 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1365 { 1366 struct hid_report *report; 1367 struct hid_field *field; 1368 int i, j; 1369 1370 list_for_each_entry(report, 1371 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1372 list) { 1373 for (i = 0; i < report->maxfield; i++) { 1374 field = report->field[i]; 1375 for (j = 0; j < field->maxusage; j++) 1376 if (field->usage[j].type == EV_LED) 1377 return field; 1378 } 1379 } 1380 return NULL; 1381 } 1382 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1383 1384 unsigned int hidinput_count_leds(struct hid_device *hid) 1385 { 1386 struct hid_report *report; 1387 struct hid_field *field; 1388 int i, j; 1389 unsigned int count = 0; 1390 1391 list_for_each_entry(report, 1392 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1393 list) { 1394 for (i = 0; i < report->maxfield; i++) { 1395 field = report->field[i]; 1396 for (j = 0; j < field->maxusage; j++) 1397 if (field->usage[j].type == EV_LED && 1398 field->value[j]) 1399 count += 1; 1400 } 1401 } 1402 return count; 1403 } 1404 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1405 1406 static void hidinput_led_worker(struct work_struct *work) 1407 { 1408 struct hid_device *hid = container_of(work, struct hid_device, 1409 led_work); 1410 struct hid_field *field; 1411 struct hid_report *report; 1412 int ret; 1413 u32 len; 1414 __u8 *buf; 1415 1416 field = hidinput_get_led_field(hid); 1417 if (!field) 1418 return; 1419 1420 /* 1421 * field->report is accessed unlocked regarding HID core. So there might 1422 * be another incoming SET-LED request from user-space, which changes 1423 * the LED state while we assemble our outgoing buffer. However, this 1424 * doesn't matter as hid_output_report() correctly converts it into a 1425 * boolean value no matter what information is currently set on the LED 1426 * field (even garbage). So the remote device will always get a valid 1427 * request. 1428 * And in case we send a wrong value, a next led worker is spawned 1429 * for every SET-LED request so the following worker will send the 1430 * correct value, guaranteed! 1431 */ 1432 1433 report = field->report; 1434 1435 /* use custom SET_REPORT request if possible (asynchronous) */ 1436 if (hid->ll_driver->request) 1437 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1438 1439 /* fall back to generic raw-output-report */ 1440 len = hid_report_len(report); 1441 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1442 if (!buf) 1443 return; 1444 1445 hid_output_report(report, buf); 1446 /* synchronous output report */ 1447 ret = hid_hw_output_report(hid, buf, len); 1448 if (ret == -ENOSYS) 1449 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1450 HID_REQ_SET_REPORT); 1451 kfree(buf); 1452 } 1453 1454 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1455 unsigned int code, int value) 1456 { 1457 struct hid_device *hid = input_get_drvdata(dev); 1458 struct hid_field *field; 1459 int offset; 1460 1461 if (type == EV_FF) 1462 return input_ff_event(dev, type, code, value); 1463 1464 if (type != EV_LED) 1465 return -1; 1466 1467 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1468 hid_warn(dev, "event field not found\n"); 1469 return -1; 1470 } 1471 1472 hid_set_field(field, offset, value); 1473 1474 schedule_work(&hid->led_work); 1475 return 0; 1476 } 1477 1478 static int hidinput_open(struct input_dev *dev) 1479 { 1480 struct hid_device *hid = input_get_drvdata(dev); 1481 1482 return hid_hw_open(hid); 1483 } 1484 1485 static void hidinput_close(struct input_dev *dev) 1486 { 1487 struct hid_device *hid = input_get_drvdata(dev); 1488 1489 hid_hw_close(hid); 1490 } 1491 1492 static void report_features(struct hid_device *hid) 1493 { 1494 struct hid_driver *drv = hid->driver; 1495 struct hid_report_enum *rep_enum; 1496 struct hid_report *rep; 1497 struct hid_usage *usage; 1498 int i, j; 1499 1500 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1501 list_for_each_entry(rep, &rep_enum->report_list, list) 1502 for (i = 0; i < rep->maxfield; i++) { 1503 /* Ignore if report count is out of bounds. */ 1504 if (rep->field[i]->report_count < 1) 1505 continue; 1506 1507 for (j = 0; j < rep->field[i]->maxusage; j++) { 1508 usage = &rep->field[i]->usage[j]; 1509 1510 /* Verify if Battery Strength feature is available */ 1511 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1512 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1513 rep->field[i]); 1514 1515 if (drv->feature_mapping) 1516 drv->feature_mapping(hid, rep->field[i], usage); 1517 } 1518 } 1519 } 1520 1521 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1522 unsigned int application) 1523 { 1524 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1525 struct input_dev *input_dev = input_allocate_device(); 1526 const char *suffix = NULL; 1527 size_t suffix_len, name_len; 1528 1529 if (!hidinput || !input_dev) 1530 goto fail; 1531 1532 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1533 hid->maxapplication > 1) { 1534 switch (application) { 1535 case HID_GD_KEYBOARD: 1536 suffix = "Keyboard"; 1537 break; 1538 case HID_GD_KEYPAD: 1539 suffix = "Keypad"; 1540 break; 1541 case HID_GD_MOUSE: 1542 suffix = "Mouse"; 1543 break; 1544 case HID_DG_STYLUS: 1545 suffix = "Pen"; 1546 break; 1547 case HID_DG_TOUCHSCREEN: 1548 suffix = "Touchscreen"; 1549 break; 1550 case HID_DG_TOUCHPAD: 1551 suffix = "Touchpad"; 1552 break; 1553 case HID_GD_SYSTEM_CONTROL: 1554 suffix = "System Control"; 1555 break; 1556 case HID_CP_CONSUMER_CONTROL: 1557 suffix = "Consumer Control"; 1558 break; 1559 case HID_GD_WIRELESS_RADIO_CTLS: 1560 suffix = "Wireless Radio Control"; 1561 break; 1562 case HID_GD_SYSTEM_MULTIAXIS: 1563 suffix = "System Multi Axis"; 1564 break; 1565 default: 1566 break; 1567 } 1568 } 1569 1570 if (suffix) { 1571 name_len = strlen(hid->name); 1572 suffix_len = strlen(suffix); 1573 if ((name_len < suffix_len) || 1574 strcmp(hid->name + name_len - suffix_len, suffix)) { 1575 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1576 hid->name, suffix); 1577 if (!hidinput->name) 1578 goto fail; 1579 } 1580 } 1581 1582 input_set_drvdata(input_dev, hid); 1583 input_dev->event = hidinput_input_event; 1584 input_dev->open = hidinput_open; 1585 input_dev->close = hidinput_close; 1586 input_dev->setkeycode = hidinput_setkeycode; 1587 input_dev->getkeycode = hidinput_getkeycode; 1588 1589 input_dev->name = hidinput->name ? hidinput->name : hid->name; 1590 input_dev->phys = hid->phys; 1591 input_dev->uniq = hid->uniq; 1592 input_dev->id.bustype = hid->bus; 1593 input_dev->id.vendor = hid->vendor; 1594 input_dev->id.product = hid->product; 1595 input_dev->id.version = hid->version; 1596 input_dev->dev.parent = &hid->dev; 1597 1598 hidinput->input = input_dev; 1599 hidinput->application = application; 1600 list_add_tail(&hidinput->list, &hid->inputs); 1601 1602 INIT_LIST_HEAD(&hidinput->reports); 1603 1604 return hidinput; 1605 1606 fail: 1607 kfree(hidinput); 1608 input_free_device(input_dev); 1609 hid_err(hid, "Out of memory during hid input probe\n"); 1610 return NULL; 1611 } 1612 1613 static bool hidinput_has_been_populated(struct hid_input *hidinput) 1614 { 1615 int i; 1616 unsigned long r = 0; 1617 1618 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 1619 r |= hidinput->input->evbit[i]; 1620 1621 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 1622 r |= hidinput->input->keybit[i]; 1623 1624 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 1625 r |= hidinput->input->relbit[i]; 1626 1627 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 1628 r |= hidinput->input->absbit[i]; 1629 1630 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 1631 r |= hidinput->input->mscbit[i]; 1632 1633 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 1634 r |= hidinput->input->ledbit[i]; 1635 1636 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 1637 r |= hidinput->input->sndbit[i]; 1638 1639 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 1640 r |= hidinput->input->ffbit[i]; 1641 1642 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 1643 r |= hidinput->input->swbit[i]; 1644 1645 return !!r; 1646 } 1647 1648 static void hidinput_cleanup_hidinput(struct hid_device *hid, 1649 struct hid_input *hidinput) 1650 { 1651 struct hid_report *report; 1652 int i, k; 1653 1654 list_del(&hidinput->list); 1655 input_free_device(hidinput->input); 1656 kfree(hidinput->name); 1657 1658 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1659 if (k == HID_OUTPUT_REPORT && 1660 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1661 continue; 1662 1663 list_for_each_entry(report, &hid->report_enum[k].report_list, 1664 list) { 1665 1666 for (i = 0; i < report->maxfield; i++) 1667 if (report->field[i]->hidinput == hidinput) 1668 report->field[i]->hidinput = NULL; 1669 } 1670 } 1671 1672 kfree(hidinput); 1673 } 1674 1675 static struct hid_input *hidinput_match(struct hid_report *report) 1676 { 1677 struct hid_device *hid = report->device; 1678 struct hid_input *hidinput; 1679 1680 list_for_each_entry(hidinput, &hid->inputs, list) { 1681 if (hidinput->report && 1682 hidinput->report->id == report->id) 1683 return hidinput; 1684 } 1685 1686 return NULL; 1687 } 1688 1689 static struct hid_input *hidinput_match_application(struct hid_report *report) 1690 { 1691 struct hid_device *hid = report->device; 1692 struct hid_input *hidinput; 1693 1694 list_for_each_entry(hidinput, &hid->inputs, list) { 1695 if (hidinput->application == report->application) 1696 return hidinput; 1697 } 1698 1699 return NULL; 1700 } 1701 1702 static inline void hidinput_configure_usages(struct hid_input *hidinput, 1703 struct hid_report *report) 1704 { 1705 int i, j; 1706 1707 for (i = 0; i < report->maxfield; i++) 1708 for (j = 0; j < report->field[i]->maxusage; j++) 1709 hidinput_configure_usage(hidinput, report->field[i], 1710 report->field[i]->usage + j); 1711 } 1712 1713 /* 1714 * Register the input device; print a message. 1715 * Configure the input layer interface 1716 * Read all reports and initialize the absolute field values. 1717 */ 1718 1719 int hidinput_connect(struct hid_device *hid, unsigned int force) 1720 { 1721 struct hid_driver *drv = hid->driver; 1722 struct hid_report *report; 1723 struct hid_input *next, *hidinput = NULL; 1724 unsigned int application; 1725 int i, k; 1726 1727 INIT_LIST_HEAD(&hid->inputs); 1728 INIT_WORK(&hid->led_work, hidinput_led_worker); 1729 1730 hid->status &= ~HID_STAT_DUP_DETECTED; 1731 1732 if (!force) { 1733 for (i = 0; i < hid->maxcollection; i++) { 1734 struct hid_collection *col = &hid->collection[i]; 1735 if (col->type == HID_COLLECTION_APPLICATION || 1736 col->type == HID_COLLECTION_PHYSICAL) 1737 if (IS_INPUT_APPLICATION(col->usage)) 1738 break; 1739 } 1740 1741 if (i == hid->maxcollection) 1742 return -1; 1743 } 1744 1745 report_features(hid); 1746 1747 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1748 if (k == HID_OUTPUT_REPORT && 1749 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1750 continue; 1751 1752 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1753 1754 if (!report->maxfield) 1755 continue; 1756 1757 application = report->application; 1758 1759 /* 1760 * Find the previous hidinput report attached 1761 * to this report id. 1762 */ 1763 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1764 hidinput = hidinput_match(report); 1765 else if (hid->maxapplication > 1 && 1766 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 1767 hidinput = hidinput_match_application(report); 1768 1769 if (!hidinput) { 1770 hidinput = hidinput_allocate(hid, application); 1771 if (!hidinput) 1772 goto out_unwind; 1773 } 1774 1775 hidinput_configure_usages(hidinput, report); 1776 1777 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1778 hidinput->report = report; 1779 1780 list_add_tail(&report->hidinput_list, 1781 &hidinput->reports); 1782 } 1783 } 1784 1785 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1786 if (drv->input_configured && 1787 drv->input_configured(hid, hidinput)) 1788 goto out_unwind; 1789 1790 if (!hidinput_has_been_populated(hidinput)) { 1791 /* no need to register an input device not populated */ 1792 hidinput_cleanup_hidinput(hid, hidinput); 1793 continue; 1794 } 1795 1796 if (input_register_device(hidinput->input)) 1797 goto out_unwind; 1798 hidinput->registered = true; 1799 } 1800 1801 if (list_empty(&hid->inputs)) { 1802 hid_err(hid, "No inputs registered, leaving\n"); 1803 goto out_unwind; 1804 } 1805 1806 if (hid->status & HID_STAT_DUP_DETECTED) 1807 hid_dbg(hid, 1808 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 1809 1810 return 0; 1811 1812 out_unwind: 1813 /* unwind the ones we already registered */ 1814 hidinput_disconnect(hid); 1815 1816 return -1; 1817 } 1818 EXPORT_SYMBOL_GPL(hidinput_connect); 1819 1820 void hidinput_disconnect(struct hid_device *hid) 1821 { 1822 struct hid_input *hidinput, *next; 1823 1824 hidinput_cleanup_battery(hid); 1825 1826 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1827 list_del(&hidinput->list); 1828 if (hidinput->registered) 1829 input_unregister_device(hidinput->input); 1830 else 1831 input_free_device(hidinput->input); 1832 kfree(hidinput->name); 1833 kfree(hidinput); 1834 } 1835 1836 /* led_work is spawned by input_dev callbacks, but doesn't access the 1837 * parent input_dev at all. Once all input devices are removed, we 1838 * know that led_work will never get restarted, so we can cancel it 1839 * synchronously and are safe. */ 1840 cancel_work_sync(&hid->led_work); 1841 } 1842 EXPORT_SYMBOL_GPL(hidinput_disconnect); 1843 1844