1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2000-2001 Vojtech Pavlik 4 * Copyright (c) 2006-2010 Jiri Kosina 5 * 6 * HID to Linux Input mapping 7 */ 8 9 /* 10 * 11 * Should you need to contact me, the author, you can do so either by 12 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 13 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 14 */ 15 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 20 #include <linux/hid.h> 21 #include <linux/hid-debug.h> 22 23 #include "hid-ids.h" 24 25 #define unk KEY_UNKNOWN 26 27 static const unsigned char hid_keyboard[256] = { 28 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 29 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 30 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 31 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 32 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 33 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 34 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 35 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 36 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk, 37 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk, 38 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 39 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk, 40 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 41 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk, 42 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 43 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk 44 }; 45 46 static const struct { 47 __s32 x; 48 __s32 y; 49 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 50 51 struct usage_priority { 52 __u32 usage; /* the HID usage associated */ 53 bool global; /* we assume all usages to be slotted, 54 * unless global 55 */ 56 unsigned int slot_overwrite; /* for globals: allows to set the usage 57 * before or after the slots 58 */ 59 }; 60 61 /* 62 * hid-input will convert this list into priorities: 63 * the first element will have the highest priority 64 * (the length of the following array) and the last 65 * element the lowest (1). 66 * 67 * hid-input will then shift the priority by 8 bits to leave some space 68 * in case drivers want to interleave other fields. 69 * 70 * To accommodate slotted devices, the slot priority is 71 * defined in the next 8 bits (defined by 0xff - slot). 72 * 73 * If drivers want to add fields before those, hid-input will 74 * leave out the first 8 bits of the priority value. 75 * 76 * This still leaves us 65535 individual priority values. 77 */ 78 static const struct usage_priority hidinput_usages_priorities[] = { 79 { /* Eraser (eraser touching) must always come before tipswitch */ 80 .usage = HID_DG_ERASER, 81 }, 82 { /* Invert must always come before In Range */ 83 .usage = HID_DG_INVERT, 84 }, 85 { /* Is the tip of the tool touching? */ 86 .usage = HID_DG_TIPSWITCH, 87 }, 88 { /* Tip Pressure might emulate tip switch */ 89 .usage = HID_DG_TIPPRESSURE, 90 }, 91 { /* In Range needs to come after the other tool states */ 92 .usage = HID_DG_INRANGE, 93 }, 94 }; 95 96 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) 97 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) 98 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) 99 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c)) 100 #define map_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c)) 101 102 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 103 &max, EV_ABS, (c)) 104 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 105 &max, EV_KEY, (c)) 106 107 static bool match_scancode(struct hid_usage *usage, 108 unsigned int cur_idx, unsigned int scancode) 109 { 110 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode; 111 } 112 113 static bool match_keycode(struct hid_usage *usage, 114 unsigned int cur_idx, unsigned int keycode) 115 { 116 /* 117 * We should exclude unmapped usages when doing lookup by keycode. 118 */ 119 return (usage->type == EV_KEY && usage->code == keycode); 120 } 121 122 static bool match_index(struct hid_usage *usage, 123 unsigned int cur_idx, unsigned int idx) 124 { 125 return cur_idx == idx; 126 } 127 128 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage, 129 unsigned int cur_idx, unsigned int val); 130 131 static struct hid_usage *hidinput_find_key(struct hid_device *hid, 132 hid_usage_cmp_t match, 133 unsigned int value, 134 unsigned int *usage_idx) 135 { 136 unsigned int i, j, k, cur_idx = 0; 137 struct hid_report *report; 138 struct hid_usage *usage; 139 140 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 141 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 142 for (i = 0; i < report->maxfield; i++) { 143 for (j = 0; j < report->field[i]->maxusage; j++) { 144 usage = report->field[i]->usage + j; 145 if (usage->type == EV_KEY || usage->type == 0) { 146 if (match(usage, cur_idx, value)) { 147 if (usage_idx) 148 *usage_idx = cur_idx; 149 return usage; 150 } 151 cur_idx++; 152 } 153 } 154 } 155 } 156 } 157 return NULL; 158 } 159 160 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid, 161 const struct input_keymap_entry *ke, 162 unsigned int *index) 163 { 164 struct hid_usage *usage; 165 unsigned int scancode; 166 167 if (ke->flags & INPUT_KEYMAP_BY_INDEX) 168 usage = hidinput_find_key(hid, match_index, ke->index, index); 169 else if (input_scancode_to_scalar(ke, &scancode) == 0) 170 usage = hidinput_find_key(hid, match_scancode, scancode, index); 171 else 172 usage = NULL; 173 174 return usage; 175 } 176 177 static int hidinput_getkeycode(struct input_dev *dev, 178 struct input_keymap_entry *ke) 179 { 180 struct hid_device *hid = input_get_drvdata(dev); 181 struct hid_usage *usage; 182 unsigned int scancode, index; 183 184 usage = hidinput_locate_usage(hid, ke, &index); 185 if (usage) { 186 ke->keycode = usage->type == EV_KEY ? 187 usage->code : KEY_RESERVED; 188 ke->index = index; 189 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE); 190 ke->len = sizeof(scancode); 191 memcpy(ke->scancode, &scancode, sizeof(scancode)); 192 return 0; 193 } 194 195 return -EINVAL; 196 } 197 198 static int hidinput_setkeycode(struct input_dev *dev, 199 const struct input_keymap_entry *ke, 200 unsigned int *old_keycode) 201 { 202 struct hid_device *hid = input_get_drvdata(dev); 203 struct hid_usage *usage; 204 205 usage = hidinput_locate_usage(hid, ke, NULL); 206 if (usage) { 207 *old_keycode = usage->type == EV_KEY ? 208 usage->code : KEY_RESERVED; 209 usage->type = EV_KEY; 210 usage->code = ke->keycode; 211 212 clear_bit(*old_keycode, dev->keybit); 213 set_bit(usage->code, dev->keybit); 214 dbg_hid("Assigned keycode %d to HID usage code %x\n", 215 usage->code, usage->hid); 216 217 /* 218 * Set the keybit for the old keycode if the old keycode is used 219 * by another key 220 */ 221 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 222 set_bit(*old_keycode, dev->keybit); 223 224 return 0; 225 } 226 227 return -EINVAL; 228 } 229 230 231 /** 232 * hidinput_calc_abs_res - calculate an absolute axis resolution 233 * @field: the HID report field to calculate resolution for 234 * @code: axis code 235 * 236 * The formula is: 237 * (logical_maximum - logical_minimum) 238 * resolution = ---------------------------------------------------------- 239 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 240 * 241 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 242 * 243 * Only exponent 1 length units are processed. Centimeters and inches are 244 * converted to millimeters. Degrees are converted to radians. 245 */ 246 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 247 { 248 __s32 unit_exponent = field->unit_exponent; 249 __s32 logical_extents = field->logical_maximum - 250 field->logical_minimum; 251 __s32 physical_extents = field->physical_maximum - 252 field->physical_minimum; 253 __s32 prev; 254 255 /* Check if the extents are sane */ 256 if (logical_extents <= 0 || physical_extents <= 0) 257 return 0; 258 259 /* 260 * Verify and convert units. 261 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 262 */ 263 switch (code) { 264 case ABS_X: 265 case ABS_Y: 266 case ABS_Z: 267 case ABS_MT_POSITION_X: 268 case ABS_MT_POSITION_Y: 269 case ABS_MT_TOOL_X: 270 case ABS_MT_TOOL_Y: 271 case ABS_MT_TOUCH_MAJOR: 272 case ABS_MT_TOUCH_MINOR: 273 if (field->unit == 0x11) { /* If centimeters */ 274 /* Convert to millimeters */ 275 unit_exponent += 1; 276 } else if (field->unit == 0x13) { /* If inches */ 277 /* Convert to millimeters */ 278 prev = physical_extents; 279 physical_extents *= 254; 280 if (physical_extents < prev) 281 return 0; 282 unit_exponent -= 1; 283 } else { 284 return 0; 285 } 286 break; 287 288 case ABS_RX: 289 case ABS_RY: 290 case ABS_RZ: 291 case ABS_WHEEL: 292 case ABS_TILT_X: 293 case ABS_TILT_Y: 294 if (field->unit == 0x14) { /* If degrees */ 295 /* Convert to radians */ 296 prev = logical_extents; 297 logical_extents *= 573; 298 if (logical_extents < prev) 299 return 0; 300 unit_exponent += 1; 301 } else if (field->unit != 0x12) { /* If not radians */ 302 return 0; 303 } 304 break; 305 306 case ABS_PRESSURE: 307 case ABS_MT_PRESSURE: 308 if (field->unit == HID_UNIT_NEWTON) { 309 /* Convert to grams, 1 newton is 101.97 grams */ 310 prev = physical_extents; 311 physical_extents *= 10197; 312 if (physical_extents < prev) 313 return 0; 314 unit_exponent -= 2; 315 } else if (field->unit != HID_UNIT_GRAM) { 316 return 0; 317 } 318 break; 319 default: 320 return 0; 321 } 322 323 /* Apply negative unit exponent */ 324 for (; unit_exponent < 0; unit_exponent++) { 325 prev = logical_extents; 326 logical_extents *= 10; 327 if (logical_extents < prev) 328 return 0; 329 } 330 /* Apply positive unit exponent */ 331 for (; unit_exponent > 0; unit_exponent--) { 332 prev = physical_extents; 333 physical_extents *= 10; 334 if (physical_extents < prev) 335 return 0; 336 } 337 338 /* Calculate resolution */ 339 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 340 } 341 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 342 343 #ifdef CONFIG_HID_BATTERY_STRENGTH 344 static enum power_supply_property hidinput_battery_props[] = { 345 POWER_SUPPLY_PROP_PRESENT, 346 POWER_SUPPLY_PROP_ONLINE, 347 POWER_SUPPLY_PROP_CAPACITY, 348 POWER_SUPPLY_PROP_MODEL_NAME, 349 POWER_SUPPLY_PROP_STATUS, 350 POWER_SUPPLY_PROP_SCOPE, 351 }; 352 353 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 354 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 355 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 356 #define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */ 357 #define HID_BATTERY_QUIRK_DYNAMIC (1 << 4) /* report present only after life signs */ 358 359 static const struct hid_device_id hid_battery_quirks[] = { 360 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 361 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 362 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 363 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 364 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 365 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 366 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 367 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 368 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 369 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 370 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 371 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 372 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 373 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 374 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 375 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 376 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), 377 HID_BATTERY_QUIRK_IGNORE }, 378 { HID_BLUETOOTH_DEVICE(BT_VENDOR_ID_APPLE, 379 USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC), 380 HID_BATTERY_QUIRK_AVOID_QUERY }, 381 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 382 USB_DEVICE_ID_ELECOM_BM084), 383 HID_BATTERY_QUIRK_IGNORE }, 384 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 385 USB_DEVICE_ID_SYMBOL_SCANNER_3), 386 HID_BATTERY_QUIRK_IGNORE }, 387 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 388 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 389 HID_BATTERY_QUIRK_IGNORE }, 390 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 391 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 392 HID_BATTERY_QUIRK_IGNORE }, 393 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L), 394 HID_BATTERY_QUIRK_AVOID_QUERY }, 395 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW), 396 HID_BATTERY_QUIRK_AVOID_QUERY }, 397 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW), 398 HID_BATTERY_QUIRK_AVOID_QUERY }, 399 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM), 400 HID_BATTERY_QUIRK_AVOID_QUERY }, 401 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_PRO_12IN), 402 HID_BATTERY_QUIRK_IGNORE }, 403 /* 404 * Elan HID touchscreens seem to all report a non present battery, 405 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C and USB HID devices. 406 */ 407 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC }, 408 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_DYNAMIC }, 409 {} 410 }; 411 412 static unsigned find_battery_quirk(struct hid_device *hdev) 413 { 414 unsigned quirks = 0; 415 const struct hid_device_id *match; 416 417 match = hid_match_id(hdev, hid_battery_quirks); 418 if (match != NULL) 419 quirks = match->driver_data; 420 421 return quirks; 422 } 423 424 static int hidinput_scale_battery_capacity(struct hid_battery *bat, 425 int value) 426 { 427 if (bat->min < bat->max && 428 value >= bat->min && value <= bat->max) 429 value = ((value - bat->min) * 100) / 430 (bat->max - bat->min); 431 432 return value; 433 } 434 435 static int hidinput_query_battery_capacity(struct hid_battery *bat) 436 { 437 int ret; 438 /* 439 * The capacity field may not be the first field in the report: some 440 * devices (e.g. the Apple Magic Trackpad 2 over Bluetooth) precede it 441 * with status flags. Read it from its actual byte offset in the report 442 * (report_offset is in bits; the leading byte is the report id). 443 */ 444 int offset = 1 + bat->report_offset / 8; 445 int len = offset + 1; 446 447 u8 *buf __free(kfree) = kmalloc(max(len, 4), GFP_KERNEL); 448 if (!buf) 449 return -ENOMEM; 450 451 ret = hid_hw_raw_request(bat->dev, bat->report_id, buf, max(len, 4), 452 bat->report_type, HID_REQ_GET_REPORT); 453 if (ret < len) 454 return -ENODATA; 455 456 return hidinput_scale_battery_capacity(bat, buf[offset]); 457 } 458 459 static int hidinput_get_battery_property(struct power_supply *psy, 460 enum power_supply_property prop, 461 union power_supply_propval *val) 462 { 463 struct hid_battery *bat = power_supply_get_drvdata(psy); 464 struct hid_device *dev = bat->dev; 465 int value; 466 int ret = 0; 467 468 switch (prop) { 469 case POWER_SUPPLY_PROP_ONLINE: 470 val->intval = 1; 471 break; 472 473 case POWER_SUPPLY_PROP_PRESENT: 474 val->intval = bat->present; 475 break; 476 477 case POWER_SUPPLY_PROP_CAPACITY: 478 if (bat->status != HID_BATTERY_REPORTED && 479 !bat->avoid_query) { 480 value = hidinput_query_battery_capacity(bat); 481 if (value < 0) 482 return value; 483 } else { 484 value = bat->capacity; 485 } 486 487 val->intval = value; 488 break; 489 490 case POWER_SUPPLY_PROP_MODEL_NAME: 491 val->strval = dev->name; 492 break; 493 494 case POWER_SUPPLY_PROP_STATUS: 495 if (bat->status != HID_BATTERY_REPORTED && 496 !bat->avoid_query) { 497 value = hidinput_query_battery_capacity(bat); 498 if (value < 0) 499 return value; 500 501 bat->capacity = value; 502 bat->status = HID_BATTERY_QUERIED; 503 } 504 505 if (bat->status == HID_BATTERY_UNKNOWN) 506 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 507 else 508 val->intval = bat->charge_status; 509 break; 510 511 case POWER_SUPPLY_PROP_SCOPE: 512 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 513 break; 514 515 default: 516 ret = -EINVAL; 517 break; 518 } 519 520 return ret; 521 } 522 523 static struct hid_battery *hidinput_find_battery(struct hid_device *dev, 524 int report_id) 525 { 526 struct hid_battery *bat; 527 528 list_for_each_entry(bat, &dev->batteries, list) { 529 if (bat->report_id == report_id) 530 return bat; 531 } 532 return NULL; 533 } 534 535 static void hidinput_cleanup_battery(void *res) 536 { 537 struct hid_battery *bat = res; 538 539 list_del(&bat->list); 540 } 541 542 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 543 struct hid_field *field, bool is_percentage) 544 { 545 struct hid_battery *bat; 546 struct power_supply_desc *psy_desc; 547 struct power_supply_config psy_cfg = { 0 }; 548 unsigned quirks; 549 s32 min, max; 550 int error; 551 552 /* Check if battery for this report ID already exists */ 553 if (hidinput_find_battery(dev, field->report->id)) 554 return 0; 555 556 quirks = find_battery_quirk(dev); 557 558 hid_dbg(dev, "device %x:%x:%x %d quirks %d report_id %d\n", 559 dev->bus, dev->vendor, dev->product, dev->version, quirks, 560 field->report->id); 561 562 if (quirks & HID_BATTERY_QUIRK_IGNORE) 563 return 0; 564 565 bat = devm_kzalloc(&dev->dev, sizeof(*bat), GFP_KERNEL); 566 if (!bat) 567 return -ENOMEM; 568 569 psy_desc = devm_kzalloc(&dev->dev, sizeof(*psy_desc), GFP_KERNEL); 570 if (!psy_desc) { 571 error = -ENOMEM; 572 goto err_free_bat; 573 } 574 575 psy_desc->name = devm_kasprintf(&dev->dev, GFP_KERNEL, 576 "hid-%s-battery-%d", 577 strlen(dev->uniq) ? 578 dev->uniq : dev_name(&dev->dev), 579 field->report->id); 580 if (!psy_desc->name) { 581 error = -ENOMEM; 582 goto err_free_desc; 583 } 584 585 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 586 psy_desc->properties = hidinput_battery_props; 587 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 588 psy_desc->use_for_apm = 0; 589 psy_desc->get_property = hidinput_get_battery_property; 590 591 min = field->logical_minimum; 592 max = field->logical_maximum; 593 594 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 595 min = 0; 596 max = 100; 597 } 598 599 if (quirks & HID_BATTERY_QUIRK_FEATURE) 600 report_type = HID_FEATURE_REPORT; 601 602 bat->dev = dev; 603 bat->min = min; 604 bat->max = max; 605 bat->report_type = report_type; 606 bat->report_id = field->report->id; 607 bat->report_offset = field->report_offset; 608 bat->charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 609 bat->status = HID_BATTERY_UNKNOWN; 610 611 /* 612 * Stylus is normally not connected to the device and thus we 613 * can't query the device and get meaningful battery strength. 614 * We have to wait for the device to report it on its own. 615 */ 616 bat->avoid_query = report_type == HID_INPUT_REPORT && 617 field->physical == HID_DG_STYLUS; 618 619 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 620 bat->avoid_query = true; 621 622 bat->present = (quirks & HID_BATTERY_QUIRK_DYNAMIC) ? false : true; 623 624 psy_cfg.drv_data = bat; 625 bat->ps = devm_power_supply_register(&dev->dev, psy_desc, &psy_cfg); 626 if (IS_ERR(bat->ps)) { 627 error = PTR_ERR(bat->ps); 628 hid_warn(dev, "can't register power supply: %d\n", error); 629 goto err_free_name; 630 } 631 632 power_supply_powers(bat->ps, &dev->dev); 633 list_add_tail(&bat->list, &dev->batteries); 634 635 error = devm_add_action_or_reset(&dev->dev, 636 hidinput_cleanup_battery, bat); 637 if (error) 638 return error; 639 640 return 0; 641 642 err_free_name: 643 devm_kfree(&dev->dev, psy_desc->name); 644 err_free_desc: 645 devm_kfree(&dev->dev, psy_desc); 646 err_free_bat: 647 devm_kfree(&dev->dev, bat); 648 return error; 649 } 650 651 static bool hidinput_update_battery_charge_status(struct hid_battery *bat, 652 unsigned int usage, int value) 653 { 654 switch (usage) { 655 case HID_BAT_CHARGING: 656 bat->charge_status = value ? 657 POWER_SUPPLY_STATUS_CHARGING : 658 POWER_SUPPLY_STATUS_DISCHARGING; 659 return true; 660 } 661 662 return false; 663 } 664 665 static void hidinput_update_battery(struct hid_device *dev, int report_id, 666 unsigned int usage, int value) 667 { 668 struct hid_battery *bat; 669 int capacity; 670 671 bat = hidinput_find_battery(dev, report_id); 672 if (!bat) 673 return; 674 675 if (hidinput_update_battery_charge_status(bat, usage, value)) { 676 bat->present = true; 677 power_supply_changed(bat->ps); 678 return; 679 } 680 681 if ((usage & HID_USAGE_PAGE) == HID_UP_DIGITIZER && value == 0) 682 return; 683 684 if (value < bat->min || value > bat->max) 685 return; 686 687 capacity = hidinput_scale_battery_capacity(bat, value); 688 689 if (bat->status != HID_BATTERY_REPORTED || 690 capacity != bat->capacity || 691 ktime_after(ktime_get_coarse(), bat->ratelimit_time)) { 692 bat->present = true; 693 bat->capacity = capacity; 694 bat->status = HID_BATTERY_REPORTED; 695 bat->ratelimit_time = 696 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 697 power_supply_changed(bat->ps); 698 } 699 } 700 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 701 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 702 struct hid_field *field, bool is_percentage) 703 { 704 return 0; 705 } 706 707 static void hidinput_update_battery(struct hid_device *dev, int report_id, 708 unsigned int usage, int value) 709 { 710 } 711 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 712 713 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 714 unsigned int type, unsigned int usage) 715 { 716 struct hid_collection *collection; 717 718 collection = &device->collection[field->usage->collection_index]; 719 720 return collection->type == type && collection->usage == usage; 721 } 722 723 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 724 struct hid_usage *usage, unsigned int usage_index) 725 { 726 struct input_dev *input = hidinput->input; 727 struct hid_device *device = input_get_drvdata(input); 728 const struct usage_priority *usage_priority = NULL; 729 int max = 0, code; 730 unsigned int i = 0; 731 unsigned long *bit = NULL; 732 733 field->hidinput = hidinput; 734 735 if (field->flags & HID_MAIN_ITEM_CONSTANT) 736 goto ignore; 737 738 /* Ignore if report count is out of bounds. */ 739 if (field->report_count < 1) 740 goto ignore; 741 742 /* only LED and HAPTIC usages are supported in output fields */ 743 if (field->report_type == HID_OUTPUT_REPORT && 744 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED && 745 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) { 746 goto ignore; 747 } 748 749 /* assign a priority based on the static list declared here */ 750 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 751 if (usage->hid == hidinput_usages_priorities[i].usage) { 752 usage_priority = &hidinput_usages_priorities[i]; 753 754 field->usages_priorities[usage_index] = 755 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 756 break; 757 } 758 } 759 760 /* 761 * For slotted devices, we need to also add the slot index 762 * in the priority. 763 */ 764 if (usage_priority && usage_priority->global) 765 field->usages_priorities[usage_index] |= 766 usage_priority->slot_overwrite; 767 else 768 field->usages_priorities[usage_index] |= 769 (0xff - field->slot_idx) << 16; 770 771 if (device->driver->input_mapping) { 772 int ret = device->driver->input_mapping(device, hidinput, field, 773 usage, &bit, &max); 774 if (ret > 0) 775 goto mapped; 776 if (ret < 0) 777 goto ignore; 778 } 779 780 switch (usage->hid & HID_USAGE_PAGE) { 781 case HID_UP_UNDEFINED: 782 goto ignore; 783 784 case HID_UP_KEYBOARD: 785 set_bit(EV_REP, input->evbit); 786 787 if ((usage->hid & HID_USAGE) < 256) { 788 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 789 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 790 } else 791 map_key(KEY_UNKNOWN); 792 793 break; 794 795 case HID_UP_BUTTON: 796 code = ((usage->hid - 1) & HID_USAGE); 797 798 switch (field->application) { 799 case HID_GD_MOUSE: 800 case HID_GD_POINTER: code += BTN_MOUSE; break; 801 case HID_GD_JOYSTICK: 802 if (code <= 0xf) 803 code += BTN_JOYSTICK; 804 else 805 code += BTN_TRIGGER_HAPPY - 0x10; 806 break; 807 case HID_GD_GAMEPAD: 808 if (code <= 0xf) 809 code += BTN_GAMEPAD; 810 else 811 code += BTN_TRIGGER_HAPPY - 0x10; 812 break; 813 case HID_CP_CONSUMER_CONTROL: 814 if (hidinput_field_in_collection(device, field, 815 HID_COLLECTION_NAMED_ARRAY, 816 HID_CP_PROGRAMMABLEBUTTONS)) { 817 if (code <= 0x1d) 818 code += KEY_MACRO1; 819 else 820 code += BTN_TRIGGER_HAPPY - 0x1e; 821 break; 822 } 823 fallthrough; 824 default: 825 switch (field->physical) { 826 case HID_GD_MOUSE: 827 case HID_GD_POINTER: code += BTN_MOUSE; break; 828 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 829 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 830 default: code += BTN_MISC; 831 } 832 } 833 834 map_key(code); 835 break; 836 837 case HID_UP_SIMULATION: 838 switch (usage->hid & 0xffff) { 839 case 0xba: map_abs(ABS_RUDDER); break; 840 case 0xbb: map_abs(ABS_THROTTLE); break; 841 case 0xc4: map_abs(ABS_GAS); break; 842 case 0xc5: map_abs(ABS_BRAKE); break; 843 case 0xc8: map_abs(ABS_WHEEL); break; 844 default: goto ignore; 845 } 846 break; 847 848 case HID_UP_GENDESK: 849 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 850 switch (usage->hid & 0xf) { 851 case 0x1: map_key_clear(KEY_POWER); break; 852 case 0x2: map_key_clear(KEY_SLEEP); break; 853 case 0x3: map_key_clear(KEY_WAKEUP); break; 854 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 855 case 0x5: map_key_clear(KEY_MENU); break; 856 case 0x6: map_key_clear(KEY_PROG1); break; 857 case 0x7: map_key_clear(KEY_HELP); break; 858 case 0x8: map_key_clear(KEY_EXIT); break; 859 case 0x9: map_key_clear(KEY_SELECT); break; 860 case 0xa: map_key_clear(KEY_RIGHT); break; 861 case 0xb: map_key_clear(KEY_LEFT); break; 862 case 0xc: map_key_clear(KEY_UP); break; 863 case 0xd: map_key_clear(KEY_DOWN); break; 864 case 0xe: map_key_clear(KEY_POWER2); break; 865 case 0xf: map_key_clear(KEY_RESTART); break; 866 default: goto unknown; 867 } 868 break; 869 } 870 871 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */ 872 switch (usage->hid) { 873 case HID_GD_UP: usage->hat_dir = 1; break; 874 case HID_GD_DOWN: usage->hat_dir = 5; break; 875 case HID_GD_RIGHT: usage->hat_dir = 3; break; 876 case HID_GD_LEFT: usage->hat_dir = 7; break; 877 case HID_GD_DO_NOT_DISTURB: 878 map_key_clear(KEY_DO_NOT_DISTURB); break; 879 default: goto unknown; 880 } 881 882 if (usage->hid <= HID_GD_LEFT) { 883 if (field->dpad) { 884 map_abs(field->dpad); 885 goto ignore; 886 } 887 map_abs(ABS_HAT0X); 888 } 889 break; 890 } 891 892 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */ 893 switch (usage->hid & 0xf) { 894 case 0x9: map_key_clear(KEY_MICMUTE); break; 895 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break; 896 default: goto ignore; 897 } 898 break; 899 } 900 901 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 902 switch (usage->hid & 0xf) { 903 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 904 default: goto ignore; 905 } 906 break; 907 } 908 909 /* 910 * Some lazy vendors declare 255 usages for System Control, 911 * leading to the creation of ABS_X|Y axis and too many others. 912 * It wouldn't be a problem if joydev doesn't consider the 913 * device as a joystick then. 914 */ 915 if (field->application == HID_GD_SYSTEM_CONTROL) 916 goto ignore; 917 918 switch (usage->hid) { 919 /* These usage IDs map directly to the usage codes. */ 920 case HID_GD_X: case HID_GD_Y: 921 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 922 if (field->flags & HID_MAIN_ITEM_RELATIVE) 923 map_rel(usage->hid & 0xf); 924 else 925 map_abs_clear(usage->hid & 0xf); 926 break; 927 928 case HID_GD_Z: 929 /* HID_GD_Z is mapped to ABS_DISTANCE for stylus/pen */ 930 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 931 map_rel(usage->hid & 0xf); 932 } else { 933 if (field->application == HID_DG_PEN || 934 field->physical == HID_DG_PEN || 935 field->logical == HID_DG_STYLUS || 936 field->physical == HID_DG_STYLUS || 937 field->application == HID_DG_DIGITIZER) 938 map_abs_clear(ABS_DISTANCE); 939 else 940 map_abs_clear(usage->hid & 0xf); 941 } 942 break; 943 944 case HID_GD_WHEEL: 945 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 946 set_bit(REL_WHEEL, input->relbit); 947 map_rel(REL_WHEEL_HI_RES); 948 } else { 949 map_abs(usage->hid & 0xf); 950 } 951 break; 952 case HID_GD_SLIDER: case HID_GD_DIAL: 953 if (field->flags & HID_MAIN_ITEM_RELATIVE) 954 map_rel(usage->hid & 0xf); 955 else 956 map_abs(usage->hid & 0xf); 957 break; 958 959 case HID_GD_HATSWITCH: 960 usage->hat_min = field->logical_minimum; 961 usage->hat_max = field->logical_maximum; 962 map_abs(ABS_HAT0X); 963 break; 964 965 case HID_GD_START: map_key_clear(BTN_START); break; 966 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 967 968 case HID_GD_RFKILL_BTN: 969 /* MS wireless radio ctl extension, also check CA */ 970 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 971 map_key_clear(KEY_RFKILL); 972 /* We need to simulate the btn release */ 973 field->flags |= HID_MAIN_ITEM_RELATIVE; 974 break; 975 } 976 goto unknown; 977 978 default: goto unknown; 979 } 980 981 break; 982 983 case HID_UP_LED: 984 switch (usage->hid & 0xffff) { /* HID-Value: */ 985 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 986 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 987 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 988 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 989 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 990 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 991 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 992 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 993 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 994 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 995 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 996 997 default: goto ignore; 998 } 999 break; 1000 1001 case HID_UP_DIGITIZER: 1002 if ((field->application & 0xff) == 0x01) /* Digitizer */ 1003 __set_bit(INPUT_PROP_POINTER, input->propbit); 1004 else if ((field->application & 0xff) == 0x02) /* Pen */ 1005 __set_bit(INPUT_PROP_DIRECT, input->propbit); 1006 1007 switch (usage->hid & 0xff) { 1008 case 0x00: /* Undefined */ 1009 goto ignore; 1010 1011 case 0x30: /* TipPressure */ 1012 if (!test_bit(BTN_TOUCH, input->keybit)) { 1013 device->quirks |= HID_QUIRK_NOTOUCH; 1014 set_bit(EV_KEY, input->evbit); 1015 set_bit(BTN_TOUCH, input->keybit); 1016 } 1017 map_abs_clear(ABS_PRESSURE); 1018 break; 1019 1020 case 0x32: /* InRange */ 1021 switch (field->physical) { 1022 case HID_DG_PUCK: 1023 map_key(BTN_TOOL_MOUSE); 1024 break; 1025 case HID_DG_FINGER: 1026 map_key(BTN_TOOL_FINGER); 1027 break; 1028 default: 1029 /* 1030 * If the physical is not given, 1031 * rely on the application. 1032 */ 1033 if (!field->physical) { 1034 switch (field->application) { 1035 case HID_DG_TOUCHSCREEN: 1036 case HID_DG_TOUCHPAD: 1037 map_key_clear(BTN_TOOL_FINGER); 1038 break; 1039 default: 1040 map_key_clear(BTN_TOOL_PEN); 1041 } 1042 } else { 1043 map_key(BTN_TOOL_PEN); 1044 } 1045 break; 1046 } 1047 break; 1048 1049 case 0x3b: /* Battery Strength */ 1050 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1051 usage->type = EV_PWR; 1052 return; 1053 1054 case 0x3c: /* Invert */ 1055 device->quirks &= ~HID_QUIRK_NOINVERT; 1056 map_key_clear(BTN_TOOL_RUBBER); 1057 break; 1058 1059 case 0x3d: /* X Tilt */ 1060 map_abs_clear(ABS_TILT_X); 1061 break; 1062 1063 case 0x3e: /* Y Tilt */ 1064 map_abs_clear(ABS_TILT_Y); 1065 break; 1066 1067 case 0x33: /* Touch */ 1068 case 0x42: /* TipSwitch */ 1069 case 0x43: /* TipSwitch2 */ 1070 device->quirks &= ~HID_QUIRK_NOTOUCH; 1071 map_key_clear(BTN_TOUCH); 1072 break; 1073 1074 case 0x44: /* BarrelSwitch */ 1075 map_key_clear(BTN_STYLUS); 1076 break; 1077 1078 case 0x45: /* ERASER */ 1079 /* 1080 * This event is reported when eraser tip touches the surface. 1081 * Actual eraser (BTN_TOOL_RUBBER) is set and released either 1082 * by Invert if tool reports proximity or by Eraser directly. 1083 */ 1084 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) { 1085 device->quirks |= HID_QUIRK_NOINVERT; 1086 set_bit(BTN_TOOL_RUBBER, input->keybit); 1087 } 1088 map_key_clear(BTN_TOUCH); 1089 break; 1090 1091 case 0x46: /* TabletPick */ 1092 case 0x5a: /* SecondaryBarrelSwitch */ 1093 map_key_clear(BTN_STYLUS2); 1094 break; 1095 1096 case 0x5b: /* TransducerSerialNumber */ 1097 case 0x6e: /* TransducerSerialNumber2 */ 1098 map_msc(MSC_SERIAL); 1099 break; 1100 1101 default: goto unknown; 1102 } 1103 break; 1104 1105 case HID_UP_TELEPHONY: 1106 switch (usage->hid & HID_USAGE) { 1107 case 0x2f: map_key_clear(KEY_MICMUTE); break; 1108 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 1109 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 1110 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 1111 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 1112 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 1113 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 1114 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 1115 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1116 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1117 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1118 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1119 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1120 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1121 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1122 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1123 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1124 default: goto ignore; 1125 } 1126 break; 1127 1128 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1129 switch (usage->hid & HID_USAGE) { 1130 case 0x000: goto ignore; 1131 case 0x030: map_key_clear(KEY_POWER); break; 1132 case 0x031: map_key_clear(KEY_RESTART); break; 1133 case 0x032: map_key_clear(KEY_SLEEP); break; 1134 case 0x034: map_key_clear(KEY_SLEEP); break; 1135 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1136 case 0x036: map_key_clear(BTN_MISC); break; 1137 1138 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1139 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1140 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1141 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1142 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1143 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1144 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1145 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1146 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1147 1148 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1149 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1150 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1151 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1152 case 0x069: map_key_clear(KEY_RED); break; 1153 case 0x06a: map_key_clear(KEY_GREEN); break; 1154 case 0x06b: map_key_clear(KEY_BLUE); break; 1155 case 0x06c: map_key_clear(KEY_YELLOW); break; 1156 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1157 1158 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1159 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1160 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1161 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1162 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1163 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1164 1165 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1166 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1167 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1168 1169 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1170 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1171 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1172 1173 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1174 case 0x083: map_key_clear(KEY_LAST); break; 1175 case 0x084: map_key_clear(KEY_ENTER); break; 1176 case 0x088: map_key_clear(KEY_PC); break; 1177 case 0x089: map_key_clear(KEY_TV); break; 1178 case 0x08a: map_key_clear(KEY_WWW); break; 1179 case 0x08b: map_key_clear(KEY_DVD); break; 1180 case 0x08c: map_key_clear(KEY_PHONE); break; 1181 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1182 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1183 case 0x08f: map_key_clear(KEY_GAMES); break; 1184 case 0x090: map_key_clear(KEY_MEMO); break; 1185 case 0x091: map_key_clear(KEY_CD); break; 1186 case 0x092: map_key_clear(KEY_VCR); break; 1187 case 0x093: map_key_clear(KEY_TUNER); break; 1188 case 0x094: map_key_clear(KEY_EXIT); break; 1189 case 0x095: map_key_clear(KEY_HELP); break; 1190 case 0x096: map_key_clear(KEY_TAPE); break; 1191 case 0x097: map_key_clear(KEY_TV2); break; 1192 case 0x098: map_key_clear(KEY_SAT); break; 1193 case 0x09a: map_key_clear(KEY_PVR); break; 1194 1195 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1196 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1197 case 0x0a0: map_key_clear(KEY_VCR2); break; 1198 1199 case 0x0b0: map_key_clear(KEY_PLAY); break; 1200 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1201 case 0x0b2: map_key_clear(KEY_RECORD); break; 1202 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1203 case 0x0b4: map_key_clear(KEY_REWIND); break; 1204 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1205 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1206 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1207 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1208 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1209 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1210 case 0x0bf: map_key_clear(KEY_SLOW); break; 1211 1212 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1213 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1214 1215 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1216 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1217 1218 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1219 case 0x0e2: map_key_clear(KEY_MUTE); break; 1220 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1221 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1222 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1223 case 0x0f5: map_key_clear(KEY_SLOW); break; 1224 1225 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1226 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1227 case 0x183: map_key_clear(KEY_CONFIG); break; 1228 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1229 case 0x185: map_key_clear(KEY_EDITOR); break; 1230 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1231 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1232 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1233 case 0x189: map_key_clear(KEY_DATABASE); break; 1234 case 0x18a: map_key_clear(KEY_MAIL); break; 1235 case 0x18b: map_key_clear(KEY_NEWS); break; 1236 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1237 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1238 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1239 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1240 case 0x190: map_key_clear(KEY_JOURNAL); break; 1241 case 0x191: map_key_clear(KEY_FINANCE); break; 1242 case 0x192: map_key_clear(KEY_CALC); break; 1243 case 0x193: map_key_clear(KEY_PLAYER); break; 1244 case 0x194: map_key_clear(KEY_FILE); break; 1245 case 0x196: map_key_clear(KEY_WWW); break; 1246 case 0x199: map_key_clear(KEY_CHAT); break; 1247 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1248 case 0x19e: map_key_clear(KEY_COFFEE); break; 1249 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1250 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1251 case 0x1a3: map_key_clear(KEY_NEXT); break; 1252 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1253 case 0x1a6: map_key_clear(KEY_HELP); break; 1254 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1255 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1256 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1257 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1258 case 0x1b4: map_key_clear(KEY_FILE); break; 1259 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1260 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1261 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1262 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1263 case 0x1bd: map_key_clear(KEY_INFO); break; 1264 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1265 case 0x1cc: map_key_clear(KEY_ACTION_ON_SELECTION); break; 1266 case 0x1cd: map_key_clear(KEY_CONTEXTUAL_INSERT); break; 1267 case 0x1ce: map_key_clear(KEY_CONTEXTUAL_QUERY); break; 1268 case 0x201: map_key_clear(KEY_NEW); break; 1269 case 0x202: map_key_clear(KEY_OPEN); break; 1270 case 0x203: map_key_clear(KEY_CLOSE); break; 1271 case 0x204: map_key_clear(KEY_EXIT); break; 1272 case 0x207: map_key_clear(KEY_SAVE); break; 1273 case 0x208: map_key_clear(KEY_PRINT); break; 1274 case 0x209: map_key_clear(KEY_PROPS); break; 1275 case 0x21a: map_key_clear(KEY_UNDO); break; 1276 case 0x21b: map_key_clear(KEY_COPY); break; 1277 case 0x21c: map_key_clear(KEY_CUT); break; 1278 case 0x21d: map_key_clear(KEY_PASTE); break; 1279 case 0x21f: map_key_clear(KEY_FIND); break; 1280 case 0x221: map_key_clear(KEY_SEARCH); break; 1281 case 0x222: map_key_clear(KEY_GOTO); break; 1282 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1283 case 0x224: map_key_clear(KEY_BACK); break; 1284 case 0x225: map_key_clear(KEY_FORWARD); break; 1285 case 0x226: map_key_clear(KEY_STOP); break; 1286 case 0x227: map_key_clear(KEY_REFRESH); break; 1287 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1288 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1289 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1290 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1291 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1292 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1293 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1294 case 0x238: /* AC Pan */ 1295 set_bit(REL_HWHEEL, input->relbit); 1296 map_rel(REL_HWHEEL_HI_RES); 1297 break; 1298 case 0x23d: map_key_clear(KEY_EDIT); break; 1299 case 0x25f: map_key_clear(KEY_CANCEL); break; 1300 case 0x269: map_key_clear(KEY_INSERT); break; 1301 case 0x26a: map_key_clear(KEY_DELETE); break; 1302 case 0x279: map_key_clear(KEY_REDO); break; 1303 1304 case 0x289: map_key_clear(KEY_REPLY); break; 1305 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1306 case 0x28c: map_key_clear(KEY_SEND); break; 1307 1308 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1309 1310 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1311 1312 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1313 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1314 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1315 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1316 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1317 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1318 1319 case 0x29f: map_key_clear(KEY_SCALE); break; 1320 1321 default: map_key_clear(KEY_UNKNOWN); 1322 } 1323 break; 1324 1325 case HID_UP_GENDEVCTRLS: 1326 switch (usage->hid) { 1327 case HID_DC_BATTERYSTRENGTH: 1328 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1329 usage->type = EV_PWR; 1330 return; 1331 } 1332 goto unknown; 1333 1334 case HID_UP_BATTERY: 1335 switch (usage->hid) { 1336 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1337 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1338 usage->type = EV_PWR; 1339 return; 1340 case HID_BAT_CHARGING: 1341 usage->type = EV_PWR; 1342 return; 1343 } 1344 goto unknown; 1345 case HID_UP_CAMERA: 1346 switch (usage->hid & HID_USAGE) { 1347 case 0x020: 1348 map_key_clear(KEY_CAMERA_FOCUS); break; 1349 case 0x021: 1350 map_key_clear(KEY_CAMERA); break; 1351 default: 1352 goto ignore; 1353 } 1354 break; 1355 1356 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1357 set_bit(EV_REP, input->evbit); 1358 switch (usage->hid & HID_USAGE) { 1359 case 0x021: map_key_clear(KEY_PRINT); break; 1360 case 0x070: map_key_clear(KEY_HP); break; 1361 case 0x071: map_key_clear(KEY_CAMERA); break; 1362 case 0x072: map_key_clear(KEY_SOUND); break; 1363 case 0x073: map_key_clear(KEY_QUESTION); break; 1364 case 0x080: map_key_clear(KEY_EMAIL); break; 1365 case 0x081: map_key_clear(KEY_CHAT); break; 1366 case 0x082: map_key_clear(KEY_SEARCH); break; 1367 case 0x083: map_key_clear(KEY_CONNECT); break; 1368 case 0x084: map_key_clear(KEY_FINANCE); break; 1369 case 0x085: map_key_clear(KEY_SPORT); break; 1370 case 0x086: map_key_clear(KEY_SHOP); break; 1371 default: goto ignore; 1372 } 1373 break; 1374 1375 case HID_UP_HPVENDOR2: 1376 set_bit(EV_REP, input->evbit); 1377 switch (usage->hid & HID_USAGE) { 1378 case 0x001: map_key_clear(KEY_MICMUTE); break; 1379 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1380 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1381 default: goto ignore; 1382 } 1383 break; 1384 1385 case HID_UP_MSVENDOR: 1386 goto ignore; 1387 1388 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1389 set_bit(EV_REP, input->evbit); 1390 goto ignore; 1391 1392 case HID_UP_LOGIVENDOR: 1393 /* intentional fallback */ 1394 case HID_UP_LOGIVENDOR2: 1395 /* intentional fallback */ 1396 case HID_UP_LOGIVENDOR3: 1397 goto ignore; 1398 1399 case HID_UP_PID: 1400 switch (usage->hid & HID_USAGE) { 1401 case 0xa4: map_key_clear(BTN_DEAD); break; 1402 default: goto ignore; 1403 } 1404 break; 1405 1406 default: 1407 unknown: 1408 if (field->report_size == 1) { 1409 if (field->report->type == HID_OUTPUT_REPORT) { 1410 map_led(LED_MISC); 1411 break; 1412 } 1413 map_key(BTN_MISC); 1414 break; 1415 } 1416 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1417 map_rel(REL_MISC); 1418 break; 1419 } 1420 map_abs(ABS_MISC); 1421 break; 1422 } 1423 1424 mapped: 1425 /* Mapping failed, bail out */ 1426 if (!bit) 1427 return; 1428 1429 if (device->driver->input_mapped && 1430 device->driver->input_mapped(device, hidinput, field, usage, 1431 &bit, &max) < 0) { 1432 /* 1433 * The driver indicated that no further generic handling 1434 * of the usage is desired. 1435 */ 1436 return; 1437 } 1438 1439 set_bit(usage->type, input->evbit); 1440 1441 /* 1442 * This part is *really* controversial: 1443 * - HID aims at being generic so we should do our best to export 1444 * all incoming events 1445 * - HID describes what events are, so there is no reason for ABS_X 1446 * to be mapped to ABS_Y 1447 * - HID is using *_MISC+N as a default value, but nothing prevents 1448 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1449 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1450 * processing) 1451 * 1452 * If devices still want to use this (at their own risk), they will 1453 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1454 * the default should be a reliable mapping. 1455 */ 1456 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1457 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1458 usage->code = find_next_zero_bit(bit, 1459 max + 1, 1460 usage->code); 1461 } else { 1462 device->status |= HID_STAT_DUP_DETECTED; 1463 goto ignore; 1464 } 1465 } 1466 1467 if (usage->code > max) 1468 goto ignore; 1469 1470 if (usage->type == EV_ABS) { 1471 1472 int a = field->logical_minimum; 1473 int b = field->logical_maximum; 1474 1475 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1476 a = field->logical_minimum = 0; 1477 b = field->logical_maximum = 255; 1478 } 1479 1480 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1481 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1482 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1483 1484 input_abs_set_res(input, usage->code, 1485 hidinput_calc_abs_res(field, usage->code)); 1486 1487 /* use a larger default input buffer for MT devices */ 1488 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1489 input_set_events_per_packet(input, 60); 1490 } 1491 1492 if (usage->type == EV_ABS && 1493 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1494 int i; 1495 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1496 input_set_abs_params(input, i, -1, 1, 0, 0); 1497 set_bit(i, input->absbit); 1498 } 1499 if (usage->hat_dir && !field->dpad) 1500 field->dpad = usage->code; 1501 } 1502 1503 /* for those devices which produce Consumer volume usage as relative, 1504 * we emulate pressing volumeup/volumedown appropriate number of times 1505 * in hidinput_hid_event() 1506 */ 1507 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1508 (usage->code == ABS_VOLUME)) { 1509 set_bit(KEY_VOLUMEUP, input->keybit); 1510 set_bit(KEY_VOLUMEDOWN, input->keybit); 1511 } 1512 1513 if (usage->type == EV_KEY) { 1514 set_bit(EV_MSC, input->evbit); 1515 set_bit(MSC_SCAN, input->mscbit); 1516 } 1517 1518 return; 1519 1520 ignore: 1521 usage->type = 0; 1522 usage->code = 0; 1523 } 1524 1525 static void hidinput_handle_scroll(struct hid_usage *usage, 1526 struct input_dev *input, 1527 __s32 value) 1528 { 1529 int code; 1530 int hi_res, lo_res; 1531 1532 if (value == 0) 1533 return; 1534 1535 if (usage->code == REL_WHEEL_HI_RES) 1536 code = REL_WHEEL; 1537 else 1538 code = REL_HWHEEL; 1539 1540 /* 1541 * Windows reports one wheel click as value 120. Where a high-res 1542 * scroll wheel is present, a fraction of 120 is reported instead. 1543 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1544 * adhere to the 120 expectation. 1545 */ 1546 hi_res = value * 120/usage->resolution_multiplier; 1547 1548 usage->wheel_accumulated += hi_res; 1549 lo_res = usage->wheel_accumulated/120; 1550 if (lo_res) 1551 usage->wheel_accumulated -= lo_res * 120; 1552 1553 input_event(input, EV_REL, code, lo_res); 1554 input_event(input, EV_REL, usage->code, hi_res); 1555 } 1556 1557 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1558 unsigned int tool) 1559 { 1560 /* if the given tool is not currently reported, ignore */ 1561 if (!test_bit(tool, input->key)) 1562 return; 1563 1564 /* 1565 * if the given tool was previously set, release it, 1566 * release any TOUCH and send an EV_SYN 1567 */ 1568 input_event(input, EV_KEY, BTN_TOUCH, 0); 1569 input_event(input, EV_KEY, tool, 0); 1570 input_event(input, EV_SYN, SYN_REPORT, 0); 1571 1572 report->tool = 0; 1573 } 1574 1575 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1576 unsigned int new_tool) 1577 { 1578 if (report->tool != new_tool) 1579 hid_report_release_tool(report, input, report->tool); 1580 1581 input_event(input, EV_KEY, new_tool, 1); 1582 report->tool = new_tool; 1583 } 1584 1585 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1586 { 1587 struct input_dev *input; 1588 struct hid_report *report = field->report; 1589 unsigned *quirks = &hid->quirks; 1590 1591 if (!usage->type) 1592 return; 1593 1594 if (usage->type == EV_PWR) { 1595 hidinput_update_battery(hid, report->id, usage->hid, value); 1596 return; 1597 } 1598 1599 if (!field->hidinput) 1600 return; 1601 1602 input = field->hidinput->input; 1603 1604 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1605 int hat_dir = usage->hat_dir; 1606 if (!hat_dir) 1607 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1608 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1609 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1610 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1611 return; 1612 } 1613 1614 /* 1615 * Ignore out-of-range values as per HID specification, 1616 * section 5.10 and 6.2.25, when NULL state bit is present. 1617 * When it's not, clamp the value to match Microsoft's input 1618 * driver as mentioned in "Required HID usages for digitizers": 1619 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1620 * 1621 * The logical_minimum < logical_maximum check is done so that we 1622 * don't unintentionally discard values sent by devices which 1623 * don't specify logical min and max. 1624 */ 1625 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1626 field->logical_minimum < field->logical_maximum) { 1627 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1628 (value < field->logical_minimum || 1629 value > field->logical_maximum)) { 1630 dbg_hid("Ignoring out-of-range value %x\n", value); 1631 return; 1632 } 1633 value = clamp(value, 1634 field->logical_minimum, 1635 field->logical_maximum); 1636 } 1637 1638 switch (usage->hid) { 1639 case HID_DG_ERASER: 1640 report->tool_active |= !!value; 1641 1642 /* 1643 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1644 * to accommodate for devices not following the spec. 1645 */ 1646 if (value) 1647 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1648 else if (report->tool != BTN_TOOL_RUBBER) 1649 /* value is off, tool is not rubber, ignore */ 1650 return; 1651 else if (*quirks & HID_QUIRK_NOINVERT && 1652 !test_bit(BTN_TOUCH, input->key)) { 1653 /* 1654 * There is no invert to release the tool, let hid_input 1655 * send BTN_TOUCH with scancode and release the tool after. 1656 */ 1657 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1658 return; 1659 } 1660 1661 /* let hid-input set BTN_TOUCH */ 1662 break; 1663 1664 case HID_DG_INVERT: 1665 report->tool_active |= !!value; 1666 1667 /* 1668 * If invert is set, we store BTN_TOOL_RUBBER. 1669 */ 1670 if (value) 1671 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1672 else if (!report->tool_active) 1673 /* tool_active not set means Invert and Eraser are not set */ 1674 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1675 1676 /* no further processing */ 1677 return; 1678 1679 case HID_DG_INRANGE: 1680 report->tool_active |= !!value; 1681 1682 if (report->tool_active) { 1683 /* 1684 * if tool is not set but is marked as active, 1685 * assume ours 1686 */ 1687 if (!report->tool) 1688 report->tool = usage->code; 1689 1690 /* drivers may have changed the value behind our back, resend it */ 1691 hid_report_set_tool(report, input, report->tool); 1692 } else { 1693 hid_report_release_tool(report, input, usage->code); 1694 } 1695 1696 /* reset tool_active for the next event */ 1697 report->tool_active = false; 1698 1699 /* no further processing */ 1700 return; 1701 1702 case HID_DG_TIPSWITCH: 1703 report->tool_active |= !!value; 1704 1705 /* if tool is set to RUBBER we should ignore the current value */ 1706 if (report->tool == BTN_TOOL_RUBBER) 1707 return; 1708 1709 break; 1710 1711 case HID_DG_TIPPRESSURE: 1712 if (*quirks & HID_QUIRK_NOTOUCH) { 1713 int a = field->logical_minimum; 1714 int b = field->logical_maximum; 1715 1716 if (value > a + ((b - a) >> 3)) { 1717 input_event(input, EV_KEY, BTN_TOUCH, 1); 1718 report->tool_active = true; 1719 } 1720 } 1721 break; 1722 1723 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1724 dbg_hid("Maximum Effects - %d\n",value); 1725 return; 1726 1727 case HID_UP_PID | 0x7fUL: 1728 dbg_hid("PID Pool Report\n"); 1729 return; 1730 } 1731 1732 switch (usage->type) { 1733 case EV_KEY: 1734 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1735 return; 1736 break; 1737 1738 case EV_REL: 1739 if (usage->code == REL_WHEEL_HI_RES || 1740 usage->code == REL_HWHEEL_HI_RES) { 1741 hidinput_handle_scroll(usage, input, value); 1742 return; 1743 } 1744 break; 1745 1746 case EV_ABS: 1747 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1748 usage->code == ABS_VOLUME) { 1749 int count = abs(value); 1750 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1751 int i; 1752 1753 for (i = 0; i < count; i++) { 1754 input_event(input, EV_KEY, direction, 1); 1755 input_sync(input); 1756 input_event(input, EV_KEY, direction, 0); 1757 input_sync(input); 1758 } 1759 return; 1760 1761 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1762 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1763 value = field->logical_maximum - value; 1764 break; 1765 } 1766 1767 /* 1768 * Ignore reports for absolute data if the data didn't change. This is 1769 * not only an optimization but also fixes 'dead' key reports. Some 1770 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1771 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1772 * can only have one of them physically available. The 'dead' keys 1773 * report constant 0. As all map to the same keycode, they'd confuse 1774 * the input layer. If we filter the 'dead' keys on the HID level, we 1775 * skip the keycode translation and only forward real events. 1776 */ 1777 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1778 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1779 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1780 usage->usage_index < field->maxusage && 1781 value == field->value[usage->usage_index]) 1782 return; 1783 1784 /* report the usage code as scancode if the key status has changed */ 1785 if (usage->type == EV_KEY && 1786 (!test_bit(usage->code, input->key)) == value) 1787 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1788 1789 input_event(input, usage->type, usage->code, value); 1790 1791 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1792 usage->type == EV_KEY && value) { 1793 input_sync(input); 1794 input_event(input, usage->type, usage->code, 0); 1795 } 1796 } 1797 1798 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1799 { 1800 struct hid_input *hidinput; 1801 1802 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1803 return; 1804 1805 list_for_each_entry(hidinput, &hid->inputs, list) 1806 input_sync(hidinput->input); 1807 } 1808 EXPORT_SYMBOL_GPL(hidinput_report_event); 1809 1810 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1811 unsigned int code, struct hid_field **field) 1812 { 1813 struct hid_report *report; 1814 int i, j; 1815 1816 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1817 for (i = 0; i < report->maxfield; i++) { 1818 *field = report->field[i]; 1819 for (j = 0; j < (*field)->maxusage; j++) 1820 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1821 return j; 1822 } 1823 } 1824 return -1; 1825 } 1826 1827 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1828 { 1829 struct hid_report *report; 1830 struct hid_field *field; 1831 int i, j; 1832 1833 list_for_each_entry(report, 1834 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1835 list) { 1836 for (i = 0; i < report->maxfield; i++) { 1837 field = report->field[i]; 1838 for (j = 0; j < field->maxusage; j++) 1839 if (field->usage[j].type == EV_LED) 1840 return field; 1841 } 1842 } 1843 return NULL; 1844 } 1845 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1846 1847 unsigned int hidinput_count_leds(struct hid_device *hid) 1848 { 1849 struct hid_report *report; 1850 struct hid_field *field; 1851 int i, j; 1852 unsigned int count = 0; 1853 1854 list_for_each_entry(report, 1855 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1856 list) { 1857 for (i = 0; i < report->maxfield; i++) { 1858 field = report->field[i]; 1859 for (j = 0; j < field->maxusage; j++) 1860 if (field->usage[j].type == EV_LED && 1861 field->value[j]) 1862 count += 1; 1863 } 1864 } 1865 return count; 1866 } 1867 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1868 1869 static void hidinput_led_worker(struct work_struct *work) 1870 { 1871 struct hid_device *hid = container_of(work, struct hid_device, 1872 led_work); 1873 struct hid_field *field; 1874 struct hid_report *report; 1875 int ret; 1876 u32 len; 1877 1878 field = hidinput_get_led_field(hid); 1879 if (!field) 1880 return; 1881 1882 /* 1883 * field->report is accessed unlocked regarding HID core. So there might 1884 * be another incoming SET-LED request from user-space, which changes 1885 * the LED state while we assemble our outgoing buffer. However, this 1886 * doesn't matter as hid_output_report() correctly converts it into a 1887 * boolean value no matter what information is currently set on the LED 1888 * field (even garbage). So the remote device will always get a valid 1889 * request. 1890 * And in case we send a wrong value, a next led worker is spawned 1891 * for every SET-LED request so the following worker will send the 1892 * correct value, guaranteed! 1893 */ 1894 1895 report = field->report; 1896 1897 /* use custom SET_REPORT request if possible (asynchronous) */ 1898 if (hid->ll_driver->request) 1899 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1900 1901 /* fall back to generic raw-output-report */ 1902 len = hid_report_len(report); 1903 u8 *buf __free(kfree) = hid_alloc_report_buf(report, GFP_KERNEL); 1904 if (!buf) 1905 return; 1906 1907 hid_output_report(report, buf); 1908 /* synchronous output report */ 1909 ret = hid_hw_output_report(hid, buf, len); 1910 if (ret == -ENOSYS) 1911 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1912 HID_REQ_SET_REPORT); 1913 } 1914 1915 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1916 unsigned int code, int value) 1917 { 1918 struct hid_device *hid = input_get_drvdata(dev); 1919 struct hid_field *field; 1920 int offset; 1921 1922 if (type == EV_FF) 1923 return input_ff_event(dev, type, code, value); 1924 1925 if (type != EV_LED) 1926 return -1; 1927 1928 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1929 hid_warn(dev, "event field not found\n"); 1930 return -1; 1931 } 1932 1933 hid_set_field(field, offset, value); 1934 1935 schedule_work(&hid->led_work); 1936 return 0; 1937 } 1938 1939 static int hidinput_open(struct input_dev *dev) 1940 { 1941 struct hid_device *hid = input_get_drvdata(dev); 1942 1943 return hid_hw_open(hid); 1944 } 1945 1946 static void hidinput_close(struct input_dev *dev) 1947 { 1948 struct hid_device *hid = input_get_drvdata(dev); 1949 1950 hid_hw_close(hid); 1951 } 1952 1953 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1954 struct hid_report *report, bool use_logical_max) 1955 { 1956 struct hid_usage *usage; 1957 bool update_needed = false; 1958 bool get_report_completed = false; 1959 int i, j; 1960 1961 if (report->maxfield == 0) 1962 return false; 1963 1964 for (i = 0; i < report->maxfield; i++) { 1965 __s32 value = use_logical_max ? 1966 report->field[i]->logical_maximum : 1967 report->field[i]->logical_minimum; 1968 1969 /* There is no good reason for a Resolution 1970 * Multiplier to have a count other than 1. 1971 * Ignore that case. 1972 */ 1973 if (report->field[i]->report_count != 1) 1974 continue; 1975 1976 for (j = 0; j < report->field[i]->maxusage; j++) { 1977 usage = &report->field[i]->usage[j]; 1978 1979 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1980 continue; 1981 1982 /* 1983 * If we have more than one feature within this 1984 * report we need to fill in the bits from the 1985 * others before we can overwrite the ones for the 1986 * Resolution Multiplier. 1987 * 1988 * But if we're not allowed to read from the device, 1989 * we just bail. Such a device should not exist 1990 * anyway. 1991 */ 1992 if (!get_report_completed && report->maxfield > 1) { 1993 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1994 return update_needed; 1995 1996 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1997 hid_hw_wait(hid); 1998 get_report_completed = true; 1999 } 2000 2001 report->field[i]->value[j] = value; 2002 update_needed = true; 2003 } 2004 } 2005 2006 return update_needed; 2007 } 2008 2009 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 2010 { 2011 struct hid_report_enum *rep_enum; 2012 struct hid_report *rep; 2013 int ret; 2014 2015 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 2016 list_for_each_entry(rep, &rep_enum->report_list, list) { 2017 bool update_needed = __hidinput_change_resolution_multipliers(hid, 2018 rep, true); 2019 2020 if (update_needed) { 2021 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 2022 if (ret) { 2023 __hidinput_change_resolution_multipliers(hid, 2024 rep, false); 2025 return; 2026 } 2027 } 2028 } 2029 2030 /* refresh our structs */ 2031 hid_setup_resolution_multiplier(hid); 2032 } 2033 2034 static void report_features(struct hid_device *hid) 2035 { 2036 struct hid_driver *drv = hid->driver; 2037 struct hid_report_enum *rep_enum; 2038 struct hid_report *rep; 2039 struct hid_usage *usage; 2040 int i, j; 2041 2042 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 2043 list_for_each_entry(rep, &rep_enum->report_list, list) 2044 for (i = 0; i < rep->maxfield; i++) { 2045 /* Ignore if report count is out of bounds. */ 2046 if (rep->field[i]->report_count < 1) 2047 continue; 2048 2049 for (j = 0; j < rep->field[i]->maxusage; j++) { 2050 usage = &rep->field[i]->usage[j]; 2051 2052 /* Verify if Battery Strength feature is available */ 2053 if (usage->hid == HID_DC_BATTERYSTRENGTH) 2054 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 2055 rep->field[i], false); 2056 2057 if (drv->feature_mapping) 2058 drv->feature_mapping(hid, rep->field[i], usage); 2059 } 2060 } 2061 } 2062 2063 static struct hid_input *hidinput_allocate(struct hid_device *hid, 2064 unsigned int application) 2065 { 2066 struct hid_input *hidinput = kzalloc_obj(*hidinput); 2067 struct input_dev *input_dev = input_allocate_device(); 2068 const char *suffix = NULL; 2069 size_t suffix_len, name_len; 2070 2071 if (!hidinput || !input_dev) 2072 goto fail; 2073 2074 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 2075 hid->maxapplication > 1) { 2076 switch (application) { 2077 case HID_GD_KEYBOARD: 2078 suffix = "Keyboard"; 2079 break; 2080 case HID_GD_KEYPAD: 2081 suffix = "Keypad"; 2082 break; 2083 case HID_GD_MOUSE: 2084 suffix = "Mouse"; 2085 break; 2086 case HID_DG_PEN: 2087 /* 2088 * yes, there is an issue here: 2089 * DG_PEN -> "Stylus" 2090 * DG_STYLUS -> "Pen" 2091 * But changing this now means users with config snippets 2092 * will have to change it and the test suite will not be happy. 2093 */ 2094 suffix = "Stylus"; 2095 break; 2096 case HID_DG_STYLUS: 2097 suffix = "Pen"; 2098 break; 2099 case HID_DG_TOUCHSCREEN: 2100 suffix = "Touchscreen"; 2101 break; 2102 case HID_DG_TOUCHPAD: 2103 suffix = "Touchpad"; 2104 break; 2105 case HID_GD_SYSTEM_CONTROL: 2106 suffix = "System Control"; 2107 break; 2108 case HID_CP_CONSUMER_CONTROL: 2109 suffix = "Consumer Control"; 2110 break; 2111 case HID_GD_WIRELESS_RADIO_CTLS: 2112 suffix = "Wireless Radio Control"; 2113 break; 2114 case HID_GD_SYSTEM_MULTIAXIS: 2115 suffix = "System Multi Axis"; 2116 break; 2117 default: 2118 break; 2119 } 2120 } 2121 2122 if (suffix) { 2123 name_len = strlen(hid->name); 2124 suffix_len = strlen(suffix); 2125 if ((name_len < suffix_len) || 2126 strcmp(hid->name + name_len - suffix_len, suffix)) { 2127 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 2128 hid->name, suffix); 2129 if (!hidinput->name) 2130 goto fail; 2131 } 2132 } 2133 2134 input_set_drvdata(input_dev, hid); 2135 input_dev->event = hidinput_input_event; 2136 input_dev->open = hidinput_open; 2137 input_dev->close = hidinput_close; 2138 input_dev->setkeycode = hidinput_setkeycode; 2139 input_dev->getkeycode = hidinput_getkeycode; 2140 2141 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2142 input_dev->phys = hid->phys; 2143 input_dev->uniq = hid->uniq; 2144 input_dev->id.bustype = hid->bus; 2145 input_dev->id.vendor = hid->vendor; 2146 input_dev->id.product = hid->product; 2147 input_dev->id.version = hid->version; 2148 input_dev->dev.parent = &hid->dev; 2149 2150 hidinput->input = input_dev; 2151 hidinput->application = application; 2152 list_add_tail(&hidinput->list, &hid->inputs); 2153 2154 INIT_LIST_HEAD(&hidinput->reports); 2155 2156 return hidinput; 2157 2158 fail: 2159 kfree(hidinput); 2160 input_free_device(input_dev); 2161 hid_err(hid, "Out of memory during hid input probe\n"); 2162 return NULL; 2163 } 2164 2165 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2166 { 2167 int i; 2168 unsigned long r = 0; 2169 2170 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2171 r |= hidinput->input->evbit[i]; 2172 2173 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2174 r |= hidinput->input->keybit[i]; 2175 2176 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2177 r |= hidinput->input->relbit[i]; 2178 2179 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2180 r |= hidinput->input->absbit[i]; 2181 2182 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2183 r |= hidinput->input->mscbit[i]; 2184 2185 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2186 r |= hidinput->input->ledbit[i]; 2187 2188 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2189 r |= hidinput->input->sndbit[i]; 2190 2191 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2192 r |= hidinput->input->ffbit[i]; 2193 2194 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2195 r |= hidinput->input->swbit[i]; 2196 2197 return !!r; 2198 } 2199 2200 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2201 struct hid_input *hidinput) 2202 { 2203 struct hid_report *report; 2204 int i, k; 2205 2206 list_del(&hidinput->list); 2207 input_free_device(hidinput->input); 2208 kfree(hidinput->name); 2209 2210 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2211 if (k == HID_OUTPUT_REPORT && 2212 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2213 continue; 2214 2215 list_for_each_entry(report, &hid->report_enum[k].report_list, 2216 list) { 2217 2218 for (i = 0; i < report->maxfield; i++) 2219 if (report->field[i]->hidinput == hidinput) 2220 report->field[i]->hidinput = NULL; 2221 } 2222 } 2223 2224 kfree(hidinput); 2225 } 2226 2227 static struct hid_input *hidinput_match(struct hid_report *report) 2228 { 2229 struct hid_device *hid = report->device; 2230 struct hid_input *hidinput; 2231 2232 list_for_each_entry(hidinput, &hid->inputs, list) { 2233 if (hidinput->report && 2234 hidinput->report->id == report->id) 2235 return hidinput; 2236 } 2237 2238 return NULL; 2239 } 2240 2241 static struct hid_input *hidinput_match_application(struct hid_report *report) 2242 { 2243 struct hid_device *hid = report->device; 2244 struct hid_input *hidinput; 2245 2246 list_for_each_entry(hidinput, &hid->inputs, list) { 2247 if (hidinput->application == report->application) 2248 return hidinput; 2249 2250 /* 2251 * Keep SystemControl and ConsumerControl applications together 2252 * with the main keyboard, if present. 2253 */ 2254 if ((report->application == HID_GD_SYSTEM_CONTROL || 2255 report->application == HID_CP_CONSUMER_CONTROL) && 2256 hidinput->application == HID_GD_KEYBOARD) { 2257 return hidinput; 2258 } 2259 } 2260 2261 return NULL; 2262 } 2263 2264 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2265 struct hid_report *report) 2266 { 2267 int i, j, k; 2268 int first_field_index = 0; 2269 int slot_collection_index = -1; 2270 int prev_collection_index = -1; 2271 unsigned int slot_idx = 0; 2272 struct hid_field *field; 2273 2274 /* 2275 * First tag all the fields that are part of a slot, 2276 * a slot needs to have one Contact ID in the collection 2277 */ 2278 for (i = 0; i < report->maxfield; i++) { 2279 field = report->field[i]; 2280 2281 /* ignore fields without usage */ 2282 if (field->maxusage < 1) 2283 continue; 2284 2285 /* 2286 * janitoring when collection_index changes 2287 */ 2288 if (prev_collection_index != field->usage->collection_index) { 2289 prev_collection_index = field->usage->collection_index; 2290 first_field_index = i; 2291 } 2292 2293 /* 2294 * if we already found a Contact ID in the collection, 2295 * tag and continue to the next. 2296 */ 2297 if (slot_collection_index == field->usage->collection_index) { 2298 field->slot_idx = slot_idx; 2299 continue; 2300 } 2301 2302 /* check if the current field has Contact ID */ 2303 for (j = 0; j < field->maxusage; j++) { 2304 if (field->usage[j].hid == HID_DG_CONTACTID) { 2305 slot_collection_index = field->usage->collection_index; 2306 slot_idx++; 2307 2308 /* 2309 * mark all previous fields and this one in the 2310 * current collection to be slotted. 2311 */ 2312 for (k = first_field_index; k <= i; k++) 2313 report->field[k]->slot_idx = slot_idx; 2314 break; 2315 } 2316 } 2317 } 2318 2319 for (i = 0; i < report->maxfield; i++) 2320 for (j = 0; j < report->field[i]->maxusage; j++) 2321 hidinput_configure_usage(hidinput, report->field[i], 2322 report->field[i]->usage + j, 2323 j); 2324 } 2325 2326 /* 2327 * Register the input device; print a message. 2328 * Configure the input layer interface 2329 * Read all reports and initialize the absolute field values. 2330 */ 2331 2332 static bool hid_has_ff_input(struct hid_device *hdev) 2333 { 2334 struct hid_input *hidinput; 2335 2336 list_for_each_entry(hidinput, &hdev->inputs, list) { 2337 if (test_bit(EV_FF, hidinput->input->evbit)) 2338 return true; 2339 } 2340 2341 return false; 2342 } 2343 2344 int hidinput_connect(struct hid_device *hid, unsigned int connect_mask) 2345 { 2346 struct hid_driver *drv = hid->driver; 2347 struct hid_report *report; 2348 struct hid_input *next, *hidinput = NULL; 2349 unsigned int application; 2350 int i, k; 2351 2352 INIT_LIST_HEAD(&hid->inputs); 2353 INIT_WORK(&hid->led_work, hidinput_led_worker); 2354 2355 hid->status &= ~HID_STAT_DUP_DETECTED; 2356 2357 if (!(connect_mask & HID_CONNECT_HIDINPUT_FORCE)) { 2358 for (i = 0; i < hid->maxcollection; i++) { 2359 struct hid_collection *col = &hid->collection[i]; 2360 if (col->type == HID_COLLECTION_APPLICATION || 2361 col->type == HID_COLLECTION_PHYSICAL) 2362 if (IS_INPUT_APPLICATION(col->usage)) 2363 break; 2364 } 2365 2366 if (i == hid->maxcollection) 2367 return -1; 2368 } 2369 2370 report_features(hid); 2371 2372 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2373 if (k == HID_OUTPUT_REPORT && 2374 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2375 continue; 2376 2377 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2378 2379 if (!report->maxfield) 2380 continue; 2381 2382 application = report->application; 2383 2384 /* 2385 * Find the previous hidinput report attached 2386 * to this report id. 2387 */ 2388 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2389 hidinput = hidinput_match(report); 2390 else if (hid->maxapplication > 1 && 2391 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2392 hidinput = hidinput_match_application(report); 2393 2394 if (!hidinput) { 2395 hidinput = hidinput_allocate(hid, application); 2396 if (!hidinput) 2397 goto out_unwind; 2398 } 2399 2400 hidinput_configure_usages(hidinput, report); 2401 2402 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2403 hidinput->report = report; 2404 2405 list_add_tail(&report->hidinput_list, 2406 &hidinput->reports); 2407 } 2408 } 2409 2410 hidinput_change_resolution_multipliers(hid); 2411 2412 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2413 if (drv->input_configured && 2414 drv->input_configured(hid, hidinput)) 2415 goto out_unwind; 2416 2417 if (!hidinput_has_been_populated(hidinput)) { 2418 /* no need to register an input device not populated */ 2419 hidinput_cleanup_hidinput(hid, hidinput); 2420 continue; 2421 } 2422 2423 if (list_is_first(&hidinput->list, &hid->inputs) && 2424 (connect_mask & HID_CONNECT_FF) && hid->ff_init && 2425 !hid_has_ff_input(hid)) 2426 hid->ff_init(hid); 2427 2428 if (input_register_device(hidinput->input)) 2429 goto out_unwind; 2430 hidinput->registered = true; 2431 } 2432 2433 if (list_empty(&hid->inputs)) { 2434 hid_dbg(hid, "No inputs registered, leaving\n"); 2435 goto out_unwind; 2436 } 2437 2438 if (hid->status & HID_STAT_DUP_DETECTED) 2439 hid_dbg(hid, 2440 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2441 2442 return 0; 2443 2444 out_unwind: 2445 /* unwind the ones we already registered */ 2446 hidinput_disconnect(hid); 2447 2448 return -1; 2449 } 2450 EXPORT_SYMBOL_GPL(hidinput_connect); 2451 2452 void hidinput_disconnect(struct hid_device *hid) 2453 { 2454 struct hid_input *hidinput, *next; 2455 2456 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2457 list_del(&hidinput->list); 2458 if (hidinput->registered) 2459 input_unregister_device(hidinput->input); 2460 else 2461 input_free_device(hidinput->input); 2462 kfree(hidinput->name); 2463 kfree(hidinput); 2464 } 2465 2466 /* led_work is spawned by input_dev callbacks, but doesn't access the 2467 * parent input_dev at all. Once all input devices are removed, we 2468 * know that led_work will never get restarted, so we can cancel it 2469 * synchronously and are safe. */ 2470 cancel_work_sync(&hid->led_work); 2471 } 2472 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2473 2474 void hidinput_reset_resume(struct hid_device *hid) 2475 { 2476 /* renegotiate host-device shared state after reset */ 2477 hidinput_change_resolution_multipliers(hid); 2478 } 2479 EXPORT_SYMBOL_GPL(hidinput_reset_resume); 2480 2481 #ifdef CONFIG_HID_KUNIT_TEST 2482 #include "hid-input-test.c" 2483 #endif 2484