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 */ 357 358 static const struct hid_device_id hid_battery_quirks[] = { 359 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 360 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 361 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 362 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 363 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 364 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 365 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 366 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 367 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 368 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 369 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 370 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 371 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 372 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 373 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 374 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 375 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), 376 HID_BATTERY_QUIRK_IGNORE }, 377 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 378 USB_DEVICE_ID_ELECOM_BM084), 379 HID_BATTERY_QUIRK_IGNORE }, 380 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 381 USB_DEVICE_ID_SYMBOL_SCANNER_3), 382 HID_BATTERY_QUIRK_IGNORE }, 383 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 384 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 385 HID_BATTERY_QUIRK_IGNORE }, 386 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 387 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 388 HID_BATTERY_QUIRK_IGNORE }, 389 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 390 HID_BATTERY_QUIRK_IGNORE }, 391 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN), 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 /* 402 * Elan I2C-HID touchscreens seem to all report a non present battery, 403 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C-HID devices. 404 */ 405 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE }, 406 {} 407 }; 408 409 static unsigned find_battery_quirk(struct hid_device *hdev) 410 { 411 unsigned quirks = 0; 412 const struct hid_device_id *match; 413 414 match = hid_match_id(hdev, hid_battery_quirks); 415 if (match != NULL) 416 quirks = match->driver_data; 417 418 return quirks; 419 } 420 421 static int hidinput_scale_battery_capacity(struct hid_device *dev, 422 int value) 423 { 424 if (dev->battery_min < dev->battery_max && 425 value >= dev->battery_min && value <= dev->battery_max) 426 value = ((value - dev->battery_min) * 100) / 427 (dev->battery_max - dev->battery_min); 428 429 return value; 430 } 431 432 static int hidinput_query_battery_capacity(struct hid_device *dev) 433 { 434 u8 *buf; 435 int ret; 436 437 buf = kmalloc(4, GFP_KERNEL); 438 if (!buf) 439 return -ENOMEM; 440 441 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 442 dev->battery_report_type, HID_REQ_GET_REPORT); 443 if (ret < 2) { 444 kfree(buf); 445 return -ENODATA; 446 } 447 448 ret = hidinput_scale_battery_capacity(dev, buf[1]); 449 kfree(buf); 450 return ret; 451 } 452 453 static int hidinput_get_battery_property(struct power_supply *psy, 454 enum power_supply_property prop, 455 union power_supply_propval *val) 456 { 457 struct hid_device *dev = power_supply_get_drvdata(psy); 458 int value; 459 int ret = 0; 460 461 switch (prop) { 462 case POWER_SUPPLY_PROP_PRESENT: 463 case POWER_SUPPLY_PROP_ONLINE: 464 val->intval = 1; 465 break; 466 467 case POWER_SUPPLY_PROP_CAPACITY: 468 if (dev->battery_status != HID_BATTERY_REPORTED && 469 !dev->battery_avoid_query) { 470 value = hidinput_query_battery_capacity(dev); 471 if (value < 0) 472 return value; 473 } else { 474 value = dev->battery_capacity; 475 } 476 477 val->intval = value; 478 break; 479 480 case POWER_SUPPLY_PROP_MODEL_NAME: 481 val->strval = dev->name; 482 break; 483 484 case POWER_SUPPLY_PROP_STATUS: 485 if (dev->battery_status != HID_BATTERY_REPORTED && 486 !dev->battery_avoid_query) { 487 value = hidinput_query_battery_capacity(dev); 488 if (value < 0) 489 return value; 490 491 dev->battery_capacity = value; 492 dev->battery_status = HID_BATTERY_QUERIED; 493 } 494 495 if (dev->battery_status == HID_BATTERY_UNKNOWN) 496 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 497 else 498 val->intval = dev->battery_charge_status; 499 break; 500 501 case POWER_SUPPLY_PROP_SCOPE: 502 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 503 break; 504 505 default: 506 ret = -EINVAL; 507 break; 508 } 509 510 return ret; 511 } 512 513 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 514 struct hid_field *field, bool is_percentage) 515 { 516 struct power_supply_desc *psy_desc; 517 struct power_supply_config psy_cfg = { .drv_data = dev, }; 518 unsigned quirks; 519 s32 min, max; 520 int error; 521 522 if (dev->battery) 523 return 0; /* already initialized? */ 524 525 quirks = find_battery_quirk(dev); 526 527 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 528 dev->bus, dev->vendor, dev->product, dev->version, quirks); 529 530 if (quirks & HID_BATTERY_QUIRK_IGNORE) 531 return 0; 532 533 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 534 if (!psy_desc) 535 return -ENOMEM; 536 537 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 538 strlen(dev->uniq) ? 539 dev->uniq : dev_name(&dev->dev)); 540 if (!psy_desc->name) { 541 error = -ENOMEM; 542 goto err_free_mem; 543 } 544 545 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 546 psy_desc->properties = hidinput_battery_props; 547 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 548 psy_desc->use_for_apm = 0; 549 psy_desc->get_property = hidinput_get_battery_property; 550 551 min = field->logical_minimum; 552 max = field->logical_maximum; 553 554 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 555 min = 0; 556 max = 100; 557 } 558 559 if (quirks & HID_BATTERY_QUIRK_FEATURE) 560 report_type = HID_FEATURE_REPORT; 561 562 dev->battery_min = min; 563 dev->battery_max = max; 564 dev->battery_report_type = report_type; 565 dev->battery_report_id = field->report->id; 566 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 567 568 /* 569 * Stylus is normally not connected to the device and thus we 570 * can't query the device and get meaningful battery strength. 571 * We have to wait for the device to report it on its own. 572 */ 573 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 574 field->physical == HID_DG_STYLUS; 575 576 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 577 dev->battery_avoid_query = true; 578 579 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 580 if (IS_ERR(dev->battery)) { 581 error = PTR_ERR(dev->battery); 582 hid_warn(dev, "can't register power supply: %d\n", error); 583 goto err_free_name; 584 } 585 586 power_supply_powers(dev->battery, &dev->dev); 587 return 0; 588 589 err_free_name: 590 kfree(psy_desc->name); 591 err_free_mem: 592 kfree(psy_desc); 593 dev->battery = NULL; 594 return error; 595 } 596 597 static void hidinput_cleanup_battery(struct hid_device *dev) 598 { 599 const struct power_supply_desc *psy_desc; 600 601 if (!dev->battery) 602 return; 603 604 psy_desc = dev->battery->desc; 605 power_supply_unregister(dev->battery); 606 kfree(psy_desc->name); 607 kfree(psy_desc); 608 dev->battery = NULL; 609 } 610 611 static bool hidinput_update_battery_charge_status(struct hid_device *dev, 612 unsigned int usage, int value) 613 { 614 switch (usage) { 615 case HID_BAT_CHARGING: 616 dev->battery_charge_status = value ? 617 POWER_SUPPLY_STATUS_CHARGING : 618 POWER_SUPPLY_STATUS_DISCHARGING; 619 return true; 620 } 621 622 return false; 623 } 624 625 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage, 626 int value) 627 { 628 int capacity; 629 630 if (!dev->battery) 631 return; 632 633 if (hidinput_update_battery_charge_status(dev, usage, value)) { 634 power_supply_changed(dev->battery); 635 return; 636 } 637 638 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 639 return; 640 641 capacity = hidinput_scale_battery_capacity(dev, value); 642 643 if (dev->battery_status != HID_BATTERY_REPORTED || 644 capacity != dev->battery_capacity || 645 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 646 dev->battery_capacity = capacity; 647 dev->battery_status = HID_BATTERY_REPORTED; 648 dev->battery_ratelimit_time = 649 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 650 power_supply_changed(dev->battery); 651 } 652 } 653 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 654 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 655 struct hid_field *field, bool is_percentage) 656 { 657 return 0; 658 } 659 660 static void hidinput_cleanup_battery(struct hid_device *dev) 661 { 662 } 663 664 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage, 665 int value) 666 { 667 } 668 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 669 670 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 671 unsigned int type, unsigned int usage) 672 { 673 struct hid_collection *collection; 674 675 collection = &device->collection[field->usage->collection_index]; 676 677 return collection->type == type && collection->usage == usage; 678 } 679 680 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 681 struct hid_usage *usage, unsigned int usage_index) 682 { 683 struct input_dev *input = hidinput->input; 684 struct hid_device *device = input_get_drvdata(input); 685 const struct usage_priority *usage_priority = NULL; 686 int max = 0, code; 687 unsigned int i = 0; 688 unsigned long *bit = NULL; 689 690 field->hidinput = hidinput; 691 692 if (field->flags & HID_MAIN_ITEM_CONSTANT) 693 goto ignore; 694 695 /* Ignore if report count is out of bounds. */ 696 if (field->report_count < 1) 697 goto ignore; 698 699 /* only LED and HAPTIC usages are supported in output fields */ 700 if (field->report_type == HID_OUTPUT_REPORT && 701 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED && 702 (usage->hid & HID_USAGE_PAGE) != HID_UP_HAPTIC) { 703 goto ignore; 704 } 705 706 /* assign a priority based on the static list declared here */ 707 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 708 if (usage->hid == hidinput_usages_priorities[i].usage) { 709 usage_priority = &hidinput_usages_priorities[i]; 710 711 field->usages_priorities[usage_index] = 712 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 713 break; 714 } 715 } 716 717 /* 718 * For slotted devices, we need to also add the slot index 719 * in the priority. 720 */ 721 if (usage_priority && usage_priority->global) 722 field->usages_priorities[usage_index] |= 723 usage_priority->slot_overwrite; 724 else 725 field->usages_priorities[usage_index] |= 726 (0xff - field->slot_idx) << 16; 727 728 if (device->driver->input_mapping) { 729 int ret = device->driver->input_mapping(device, hidinput, field, 730 usage, &bit, &max); 731 if (ret > 0) 732 goto mapped; 733 if (ret < 0) 734 goto ignore; 735 } 736 737 switch (usage->hid & HID_USAGE_PAGE) { 738 case HID_UP_UNDEFINED: 739 goto ignore; 740 741 case HID_UP_KEYBOARD: 742 set_bit(EV_REP, input->evbit); 743 744 if ((usage->hid & HID_USAGE) < 256) { 745 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 746 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 747 } else 748 map_key(KEY_UNKNOWN); 749 750 break; 751 752 case HID_UP_BUTTON: 753 code = ((usage->hid - 1) & HID_USAGE); 754 755 switch (field->application) { 756 case HID_GD_MOUSE: 757 case HID_GD_POINTER: code += BTN_MOUSE; break; 758 case HID_GD_JOYSTICK: 759 if (code <= 0xf) 760 code += BTN_JOYSTICK; 761 else 762 code += BTN_TRIGGER_HAPPY - 0x10; 763 break; 764 case HID_GD_GAMEPAD: 765 if (code <= 0xf) 766 code += BTN_GAMEPAD; 767 else 768 code += BTN_TRIGGER_HAPPY - 0x10; 769 break; 770 case HID_CP_CONSUMER_CONTROL: 771 if (hidinput_field_in_collection(device, field, 772 HID_COLLECTION_NAMED_ARRAY, 773 HID_CP_PROGRAMMABLEBUTTONS)) { 774 if (code <= 0x1d) 775 code += KEY_MACRO1; 776 else 777 code += BTN_TRIGGER_HAPPY - 0x1e; 778 break; 779 } 780 fallthrough; 781 default: 782 switch (field->physical) { 783 case HID_GD_MOUSE: 784 case HID_GD_POINTER: code += BTN_MOUSE; break; 785 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 786 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 787 default: code += BTN_MISC; 788 } 789 } 790 791 map_key(code); 792 break; 793 794 case HID_UP_SIMULATION: 795 switch (usage->hid & 0xffff) { 796 case 0xba: map_abs(ABS_RUDDER); break; 797 case 0xbb: map_abs(ABS_THROTTLE); break; 798 case 0xc4: map_abs(ABS_GAS); break; 799 case 0xc5: map_abs(ABS_BRAKE); break; 800 case 0xc8: map_abs(ABS_WHEEL); break; 801 default: goto ignore; 802 } 803 break; 804 805 case HID_UP_GENDESK: 806 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 807 switch (usage->hid & 0xf) { 808 case 0x1: map_key_clear(KEY_POWER); break; 809 case 0x2: map_key_clear(KEY_SLEEP); break; 810 case 0x3: map_key_clear(KEY_WAKEUP); break; 811 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 812 case 0x5: map_key_clear(KEY_MENU); break; 813 case 0x6: map_key_clear(KEY_PROG1); break; 814 case 0x7: map_key_clear(KEY_HELP); break; 815 case 0x8: map_key_clear(KEY_EXIT); break; 816 case 0x9: map_key_clear(KEY_SELECT); break; 817 case 0xa: map_key_clear(KEY_RIGHT); break; 818 case 0xb: map_key_clear(KEY_LEFT); break; 819 case 0xc: map_key_clear(KEY_UP); break; 820 case 0xd: map_key_clear(KEY_DOWN); break; 821 case 0xe: map_key_clear(KEY_POWER2); break; 822 case 0xf: map_key_clear(KEY_RESTART); break; 823 default: goto unknown; 824 } 825 break; 826 } 827 828 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */ 829 switch (usage->hid) { 830 case HID_GD_UP: usage->hat_dir = 1; break; 831 case HID_GD_DOWN: usage->hat_dir = 5; break; 832 case HID_GD_RIGHT: usage->hat_dir = 3; break; 833 case HID_GD_LEFT: usage->hat_dir = 7; break; 834 case HID_GD_DO_NOT_DISTURB: 835 map_key_clear(KEY_DO_NOT_DISTURB); break; 836 default: goto unknown; 837 } 838 839 if (usage->hid <= HID_GD_LEFT) { 840 if (field->dpad) { 841 map_abs(field->dpad); 842 goto ignore; 843 } 844 map_abs(ABS_HAT0X); 845 } 846 break; 847 } 848 849 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */ 850 switch (usage->hid & 0xf) { 851 case 0x9: map_key_clear(KEY_MICMUTE); break; 852 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break; 853 default: goto ignore; 854 } 855 break; 856 } 857 858 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 859 switch (usage->hid & 0xf) { 860 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 861 default: goto ignore; 862 } 863 break; 864 } 865 866 /* 867 * Some lazy vendors declare 255 usages for System Control, 868 * leading to the creation of ABS_X|Y axis and too many others. 869 * It wouldn't be a problem if joydev doesn't consider the 870 * device as a joystick then. 871 */ 872 if (field->application == HID_GD_SYSTEM_CONTROL) 873 goto ignore; 874 875 switch (usage->hid) { 876 /* These usage IDs map directly to the usage codes. */ 877 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 878 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 879 if (field->flags & HID_MAIN_ITEM_RELATIVE) 880 map_rel(usage->hid & 0xf); 881 else 882 map_abs_clear(usage->hid & 0xf); 883 break; 884 885 case HID_GD_WHEEL: 886 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 887 set_bit(REL_WHEEL, input->relbit); 888 map_rel(REL_WHEEL_HI_RES); 889 } else { 890 map_abs(usage->hid & 0xf); 891 } 892 break; 893 case HID_GD_SLIDER: case HID_GD_DIAL: 894 if (field->flags & HID_MAIN_ITEM_RELATIVE) 895 map_rel(usage->hid & 0xf); 896 else 897 map_abs(usage->hid & 0xf); 898 break; 899 900 case HID_GD_HATSWITCH: 901 usage->hat_min = field->logical_minimum; 902 usage->hat_max = field->logical_maximum; 903 map_abs(ABS_HAT0X); 904 break; 905 906 case HID_GD_START: map_key_clear(BTN_START); break; 907 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 908 909 case HID_GD_RFKILL_BTN: 910 /* MS wireless radio ctl extension, also check CA */ 911 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 912 map_key_clear(KEY_RFKILL); 913 /* We need to simulate the btn release */ 914 field->flags |= HID_MAIN_ITEM_RELATIVE; 915 break; 916 } 917 goto unknown; 918 919 default: goto unknown; 920 } 921 922 break; 923 924 case HID_UP_LED: 925 switch (usage->hid & 0xffff) { /* HID-Value: */ 926 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 927 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 928 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 929 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 930 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 931 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 932 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 933 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 934 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 935 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 936 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 937 938 default: goto ignore; 939 } 940 break; 941 942 case HID_UP_DIGITIZER: 943 if ((field->application & 0xff) == 0x01) /* Digitizer */ 944 __set_bit(INPUT_PROP_POINTER, input->propbit); 945 else if ((field->application & 0xff) == 0x02) /* Pen */ 946 __set_bit(INPUT_PROP_DIRECT, input->propbit); 947 948 switch (usage->hid & 0xff) { 949 case 0x00: /* Undefined */ 950 goto ignore; 951 952 case 0x30: /* TipPressure */ 953 if (!test_bit(BTN_TOUCH, input->keybit)) { 954 device->quirks |= HID_QUIRK_NOTOUCH; 955 set_bit(EV_KEY, input->evbit); 956 set_bit(BTN_TOUCH, input->keybit); 957 } 958 map_abs_clear(ABS_PRESSURE); 959 break; 960 961 case 0x32: /* InRange */ 962 switch (field->physical) { 963 case HID_DG_PUCK: 964 map_key(BTN_TOOL_MOUSE); 965 break; 966 case HID_DG_FINGER: 967 map_key(BTN_TOOL_FINGER); 968 break; 969 default: 970 /* 971 * If the physical is not given, 972 * rely on the application. 973 */ 974 if (!field->physical) { 975 switch (field->application) { 976 case HID_DG_TOUCHSCREEN: 977 case HID_DG_TOUCHPAD: 978 map_key_clear(BTN_TOOL_FINGER); 979 break; 980 default: 981 map_key_clear(BTN_TOOL_PEN); 982 } 983 } else { 984 map_key(BTN_TOOL_PEN); 985 } 986 break; 987 } 988 break; 989 990 case 0x3b: /* Battery Strength */ 991 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 992 usage->type = EV_PWR; 993 return; 994 995 case 0x3c: /* Invert */ 996 device->quirks &= ~HID_QUIRK_NOINVERT; 997 map_key_clear(BTN_TOOL_RUBBER); 998 break; 999 1000 case 0x3d: /* X Tilt */ 1001 map_abs_clear(ABS_TILT_X); 1002 break; 1003 1004 case 0x3e: /* Y Tilt */ 1005 map_abs_clear(ABS_TILT_Y); 1006 break; 1007 1008 case 0x33: /* Touch */ 1009 case 0x42: /* TipSwitch */ 1010 case 0x43: /* TipSwitch2 */ 1011 device->quirks &= ~HID_QUIRK_NOTOUCH; 1012 map_key_clear(BTN_TOUCH); 1013 break; 1014 1015 case 0x44: /* BarrelSwitch */ 1016 map_key_clear(BTN_STYLUS); 1017 break; 1018 1019 case 0x45: /* ERASER */ 1020 /* 1021 * This event is reported when eraser tip touches the surface. 1022 * Actual eraser (BTN_TOOL_RUBBER) is set and released either 1023 * by Invert if tool reports proximity or by Eraser directly. 1024 */ 1025 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) { 1026 device->quirks |= HID_QUIRK_NOINVERT; 1027 set_bit(BTN_TOOL_RUBBER, input->keybit); 1028 } 1029 map_key_clear(BTN_TOUCH); 1030 break; 1031 1032 case 0x46: /* TabletPick */ 1033 case 0x5a: /* SecondaryBarrelSwitch */ 1034 map_key_clear(BTN_STYLUS2); 1035 break; 1036 1037 case 0x5b: /* TransducerSerialNumber */ 1038 case 0x6e: /* TransducerSerialNumber2 */ 1039 map_msc(MSC_SERIAL); 1040 break; 1041 1042 default: goto unknown; 1043 } 1044 break; 1045 1046 case HID_UP_TELEPHONY: 1047 switch (usage->hid & HID_USAGE) { 1048 case 0x2f: map_key_clear(KEY_MICMUTE); break; 1049 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 1050 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 1051 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 1052 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 1053 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 1054 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 1055 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 1056 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1057 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1058 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1059 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1060 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1061 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1062 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1063 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1064 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1065 default: goto ignore; 1066 } 1067 break; 1068 1069 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1070 switch (usage->hid & HID_USAGE) { 1071 case 0x000: goto ignore; 1072 case 0x030: map_key_clear(KEY_POWER); break; 1073 case 0x031: map_key_clear(KEY_RESTART); break; 1074 case 0x032: map_key_clear(KEY_SLEEP); break; 1075 case 0x034: map_key_clear(KEY_SLEEP); break; 1076 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1077 case 0x036: map_key_clear(BTN_MISC); break; 1078 1079 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1080 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1081 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1082 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1083 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1084 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1085 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1086 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1087 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1088 1089 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1090 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1091 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1092 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1093 case 0x069: map_key_clear(KEY_RED); break; 1094 case 0x06a: map_key_clear(KEY_GREEN); break; 1095 case 0x06b: map_key_clear(KEY_BLUE); break; 1096 case 0x06c: map_key_clear(KEY_YELLOW); break; 1097 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1098 1099 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1100 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1101 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1102 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1103 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1104 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1105 1106 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1107 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1108 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1109 1110 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1111 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1112 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1113 1114 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1115 case 0x083: map_key_clear(KEY_LAST); break; 1116 case 0x084: map_key_clear(KEY_ENTER); break; 1117 case 0x088: map_key_clear(KEY_PC); break; 1118 case 0x089: map_key_clear(KEY_TV); break; 1119 case 0x08a: map_key_clear(KEY_WWW); break; 1120 case 0x08b: map_key_clear(KEY_DVD); break; 1121 case 0x08c: map_key_clear(KEY_PHONE); break; 1122 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1123 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1124 case 0x08f: map_key_clear(KEY_GAMES); break; 1125 case 0x090: map_key_clear(KEY_MEMO); break; 1126 case 0x091: map_key_clear(KEY_CD); break; 1127 case 0x092: map_key_clear(KEY_VCR); break; 1128 case 0x093: map_key_clear(KEY_TUNER); break; 1129 case 0x094: map_key_clear(KEY_EXIT); break; 1130 case 0x095: map_key_clear(KEY_HELP); break; 1131 case 0x096: map_key_clear(KEY_TAPE); break; 1132 case 0x097: map_key_clear(KEY_TV2); break; 1133 case 0x098: map_key_clear(KEY_SAT); break; 1134 case 0x09a: map_key_clear(KEY_PVR); break; 1135 1136 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1137 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1138 case 0x0a0: map_key_clear(KEY_VCR2); break; 1139 1140 case 0x0b0: map_key_clear(KEY_PLAY); break; 1141 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1142 case 0x0b2: map_key_clear(KEY_RECORD); break; 1143 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1144 case 0x0b4: map_key_clear(KEY_REWIND); break; 1145 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1146 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1147 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1148 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1149 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1150 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1151 case 0x0bf: map_key_clear(KEY_SLOW); break; 1152 1153 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1154 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1155 1156 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1157 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1158 1159 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1160 case 0x0e2: map_key_clear(KEY_MUTE); break; 1161 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1162 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1163 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1164 case 0x0f5: map_key_clear(KEY_SLOW); break; 1165 1166 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1167 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1168 case 0x183: map_key_clear(KEY_CONFIG); break; 1169 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1170 case 0x185: map_key_clear(KEY_EDITOR); break; 1171 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1172 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1173 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1174 case 0x189: map_key_clear(KEY_DATABASE); break; 1175 case 0x18a: map_key_clear(KEY_MAIL); break; 1176 case 0x18b: map_key_clear(KEY_NEWS); break; 1177 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1178 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1179 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1180 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1181 case 0x190: map_key_clear(KEY_JOURNAL); break; 1182 case 0x191: map_key_clear(KEY_FINANCE); break; 1183 case 0x192: map_key_clear(KEY_CALC); break; 1184 case 0x193: map_key_clear(KEY_PLAYER); break; 1185 case 0x194: map_key_clear(KEY_FILE); break; 1186 case 0x196: map_key_clear(KEY_WWW); break; 1187 case 0x199: map_key_clear(KEY_CHAT); break; 1188 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1189 case 0x19e: map_key_clear(KEY_COFFEE); break; 1190 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1191 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1192 case 0x1a3: map_key_clear(KEY_NEXT); break; 1193 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1194 case 0x1a6: map_key_clear(KEY_HELP); break; 1195 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1196 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1197 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1198 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1199 case 0x1b4: map_key_clear(KEY_FILE); break; 1200 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1201 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1202 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1203 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1204 case 0x1bd: map_key_clear(KEY_INFO); break; 1205 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1206 case 0x201: map_key_clear(KEY_NEW); break; 1207 case 0x202: map_key_clear(KEY_OPEN); break; 1208 case 0x203: map_key_clear(KEY_CLOSE); break; 1209 case 0x204: map_key_clear(KEY_EXIT); break; 1210 case 0x207: map_key_clear(KEY_SAVE); break; 1211 case 0x208: map_key_clear(KEY_PRINT); break; 1212 case 0x209: map_key_clear(KEY_PROPS); break; 1213 case 0x21a: map_key_clear(KEY_UNDO); break; 1214 case 0x21b: map_key_clear(KEY_COPY); break; 1215 case 0x21c: map_key_clear(KEY_CUT); break; 1216 case 0x21d: map_key_clear(KEY_PASTE); break; 1217 case 0x21f: map_key_clear(KEY_FIND); break; 1218 case 0x221: map_key_clear(KEY_SEARCH); break; 1219 case 0x222: map_key_clear(KEY_GOTO); break; 1220 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1221 case 0x224: map_key_clear(KEY_BACK); break; 1222 case 0x225: map_key_clear(KEY_FORWARD); break; 1223 case 0x226: map_key_clear(KEY_STOP); break; 1224 case 0x227: map_key_clear(KEY_REFRESH); break; 1225 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1226 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1227 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1228 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1229 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1230 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1231 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1232 case 0x238: /* AC Pan */ 1233 set_bit(REL_HWHEEL, input->relbit); 1234 map_rel(REL_HWHEEL_HI_RES); 1235 break; 1236 case 0x23d: map_key_clear(KEY_EDIT); break; 1237 case 0x25f: map_key_clear(KEY_CANCEL); break; 1238 case 0x269: map_key_clear(KEY_INSERT); break; 1239 case 0x26a: map_key_clear(KEY_DELETE); break; 1240 case 0x279: map_key_clear(KEY_REDO); break; 1241 1242 case 0x289: map_key_clear(KEY_REPLY); break; 1243 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1244 case 0x28c: map_key_clear(KEY_SEND); break; 1245 1246 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1247 1248 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1249 1250 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1251 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1252 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1253 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1254 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1255 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1256 1257 case 0x29f: map_key_clear(KEY_SCALE); break; 1258 1259 default: map_key_clear(KEY_UNKNOWN); 1260 } 1261 break; 1262 1263 case HID_UP_GENDEVCTRLS: 1264 switch (usage->hid) { 1265 case HID_DC_BATTERYSTRENGTH: 1266 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1267 usage->type = EV_PWR; 1268 return; 1269 } 1270 goto unknown; 1271 1272 case HID_UP_BATTERY: 1273 switch (usage->hid) { 1274 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1275 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1276 usage->type = EV_PWR; 1277 return; 1278 case HID_BAT_CHARGING: 1279 usage->type = EV_PWR; 1280 return; 1281 } 1282 goto unknown; 1283 case HID_UP_CAMERA: 1284 switch (usage->hid & HID_USAGE) { 1285 case 0x020: 1286 map_key_clear(KEY_CAMERA_FOCUS); break; 1287 case 0x021: 1288 map_key_clear(KEY_CAMERA); break; 1289 default: 1290 goto ignore; 1291 } 1292 break; 1293 1294 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1295 set_bit(EV_REP, input->evbit); 1296 switch (usage->hid & HID_USAGE) { 1297 case 0x021: map_key_clear(KEY_PRINT); break; 1298 case 0x070: map_key_clear(KEY_HP); break; 1299 case 0x071: map_key_clear(KEY_CAMERA); break; 1300 case 0x072: map_key_clear(KEY_SOUND); break; 1301 case 0x073: map_key_clear(KEY_QUESTION); break; 1302 case 0x080: map_key_clear(KEY_EMAIL); break; 1303 case 0x081: map_key_clear(KEY_CHAT); break; 1304 case 0x082: map_key_clear(KEY_SEARCH); break; 1305 case 0x083: map_key_clear(KEY_CONNECT); break; 1306 case 0x084: map_key_clear(KEY_FINANCE); break; 1307 case 0x085: map_key_clear(KEY_SPORT); break; 1308 case 0x086: map_key_clear(KEY_SHOP); break; 1309 default: goto ignore; 1310 } 1311 break; 1312 1313 case HID_UP_HPVENDOR2: 1314 set_bit(EV_REP, input->evbit); 1315 switch (usage->hid & HID_USAGE) { 1316 case 0x001: map_key_clear(KEY_MICMUTE); break; 1317 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1318 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1319 default: goto ignore; 1320 } 1321 break; 1322 1323 case HID_UP_MSVENDOR: 1324 goto ignore; 1325 1326 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1327 set_bit(EV_REP, input->evbit); 1328 goto ignore; 1329 1330 case HID_UP_LOGIVENDOR: 1331 /* intentional fallback */ 1332 case HID_UP_LOGIVENDOR2: 1333 /* intentional fallback */ 1334 case HID_UP_LOGIVENDOR3: 1335 goto ignore; 1336 1337 case HID_UP_PID: 1338 switch (usage->hid & HID_USAGE) { 1339 case 0xa4: map_key_clear(BTN_DEAD); break; 1340 default: goto ignore; 1341 } 1342 break; 1343 1344 default: 1345 unknown: 1346 if (field->report_size == 1) { 1347 if (field->report->type == HID_OUTPUT_REPORT) { 1348 map_led(LED_MISC); 1349 break; 1350 } 1351 map_key(BTN_MISC); 1352 break; 1353 } 1354 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1355 map_rel(REL_MISC); 1356 break; 1357 } 1358 map_abs(ABS_MISC); 1359 break; 1360 } 1361 1362 mapped: 1363 /* Mapping failed, bail out */ 1364 if (!bit) 1365 return; 1366 1367 if (device->driver->input_mapped && 1368 device->driver->input_mapped(device, hidinput, field, usage, 1369 &bit, &max) < 0) { 1370 /* 1371 * The driver indicated that no further generic handling 1372 * of the usage is desired. 1373 */ 1374 return; 1375 } 1376 1377 set_bit(usage->type, input->evbit); 1378 1379 /* 1380 * This part is *really* controversial: 1381 * - HID aims at being generic so we should do our best to export 1382 * all incoming events 1383 * - HID describes what events are, so there is no reason for ABS_X 1384 * to be mapped to ABS_Y 1385 * - HID is using *_MISC+N as a default value, but nothing prevents 1386 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1387 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1388 * processing) 1389 * 1390 * If devices still want to use this (at their own risk), they will 1391 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1392 * the default should be a reliable mapping. 1393 */ 1394 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1395 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1396 usage->code = find_next_zero_bit(bit, 1397 max + 1, 1398 usage->code); 1399 } else { 1400 device->status |= HID_STAT_DUP_DETECTED; 1401 goto ignore; 1402 } 1403 } 1404 1405 if (usage->code > max) 1406 goto ignore; 1407 1408 if (usage->type == EV_ABS) { 1409 1410 int a = field->logical_minimum; 1411 int b = field->logical_maximum; 1412 1413 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1414 a = field->logical_minimum = 0; 1415 b = field->logical_maximum = 255; 1416 } 1417 1418 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1419 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1420 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1421 1422 input_abs_set_res(input, usage->code, 1423 hidinput_calc_abs_res(field, usage->code)); 1424 1425 /* use a larger default input buffer for MT devices */ 1426 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1427 input_set_events_per_packet(input, 60); 1428 } 1429 1430 if (usage->type == EV_ABS && 1431 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1432 int i; 1433 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1434 input_set_abs_params(input, i, -1, 1, 0, 0); 1435 set_bit(i, input->absbit); 1436 } 1437 if (usage->hat_dir && !field->dpad) 1438 field->dpad = usage->code; 1439 } 1440 1441 /* for those devices which produce Consumer volume usage as relative, 1442 * we emulate pressing volumeup/volumedown appropriate number of times 1443 * in hidinput_hid_event() 1444 */ 1445 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1446 (usage->code == ABS_VOLUME)) { 1447 set_bit(KEY_VOLUMEUP, input->keybit); 1448 set_bit(KEY_VOLUMEDOWN, input->keybit); 1449 } 1450 1451 if (usage->type == EV_KEY) { 1452 set_bit(EV_MSC, input->evbit); 1453 set_bit(MSC_SCAN, input->mscbit); 1454 } 1455 1456 return; 1457 1458 ignore: 1459 usage->type = 0; 1460 usage->code = 0; 1461 } 1462 1463 static void hidinput_handle_scroll(struct hid_usage *usage, 1464 struct input_dev *input, 1465 __s32 value) 1466 { 1467 int code; 1468 int hi_res, lo_res; 1469 1470 if (value == 0) 1471 return; 1472 1473 if (usage->code == REL_WHEEL_HI_RES) 1474 code = REL_WHEEL; 1475 else 1476 code = REL_HWHEEL; 1477 1478 /* 1479 * Windows reports one wheel click as value 120. Where a high-res 1480 * scroll wheel is present, a fraction of 120 is reported instead. 1481 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1482 * adhere to the 120 expectation. 1483 */ 1484 hi_res = value * 120/usage->resolution_multiplier; 1485 1486 usage->wheel_accumulated += hi_res; 1487 lo_res = usage->wheel_accumulated/120; 1488 if (lo_res) 1489 usage->wheel_accumulated -= lo_res * 120; 1490 1491 input_event(input, EV_REL, code, lo_res); 1492 input_event(input, EV_REL, usage->code, hi_res); 1493 } 1494 1495 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1496 unsigned int tool) 1497 { 1498 /* if the given tool is not currently reported, ignore */ 1499 if (!test_bit(tool, input->key)) 1500 return; 1501 1502 /* 1503 * if the given tool was previously set, release it, 1504 * release any TOUCH and send an EV_SYN 1505 */ 1506 input_event(input, EV_KEY, BTN_TOUCH, 0); 1507 input_event(input, EV_KEY, tool, 0); 1508 input_event(input, EV_SYN, SYN_REPORT, 0); 1509 1510 report->tool = 0; 1511 } 1512 1513 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1514 unsigned int new_tool) 1515 { 1516 if (report->tool != new_tool) 1517 hid_report_release_tool(report, input, report->tool); 1518 1519 input_event(input, EV_KEY, new_tool, 1); 1520 report->tool = new_tool; 1521 } 1522 1523 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1524 { 1525 struct input_dev *input; 1526 struct hid_report *report = field->report; 1527 unsigned *quirks = &hid->quirks; 1528 1529 if (!usage->type) 1530 return; 1531 1532 if (usage->type == EV_PWR) { 1533 hidinput_update_battery(hid, usage->hid, value); 1534 return; 1535 } 1536 1537 if (!field->hidinput) 1538 return; 1539 1540 input = field->hidinput->input; 1541 1542 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1543 int hat_dir = usage->hat_dir; 1544 if (!hat_dir) 1545 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1546 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1547 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1548 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1549 return; 1550 } 1551 1552 /* 1553 * Ignore out-of-range values as per HID specification, 1554 * section 5.10 and 6.2.25, when NULL state bit is present. 1555 * When it's not, clamp the value to match Microsoft's input 1556 * driver as mentioned in "Required HID usages for digitizers": 1557 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1558 * 1559 * The logical_minimum < logical_maximum check is done so that we 1560 * don't unintentionally discard values sent by devices which 1561 * don't specify logical min and max. 1562 */ 1563 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1564 field->logical_minimum < field->logical_maximum) { 1565 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1566 (value < field->logical_minimum || 1567 value > field->logical_maximum)) { 1568 dbg_hid("Ignoring out-of-range value %x\n", value); 1569 return; 1570 } 1571 value = clamp(value, 1572 field->logical_minimum, 1573 field->logical_maximum); 1574 } 1575 1576 switch (usage->hid) { 1577 case HID_DG_ERASER: 1578 report->tool_active |= !!value; 1579 1580 /* 1581 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1582 * to accommodate for devices not following the spec. 1583 */ 1584 if (value) 1585 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1586 else if (report->tool != BTN_TOOL_RUBBER) 1587 /* value is off, tool is not rubber, ignore */ 1588 return; 1589 else if (*quirks & HID_QUIRK_NOINVERT && 1590 !test_bit(BTN_TOUCH, input->key)) { 1591 /* 1592 * There is no invert to release the tool, let hid_input 1593 * send BTN_TOUCH with scancode and release the tool after. 1594 */ 1595 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1596 return; 1597 } 1598 1599 /* let hid-input set BTN_TOUCH */ 1600 break; 1601 1602 case HID_DG_INVERT: 1603 report->tool_active |= !!value; 1604 1605 /* 1606 * If invert is set, we store BTN_TOOL_RUBBER. 1607 */ 1608 if (value) 1609 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1610 else if (!report->tool_active) 1611 /* tool_active not set means Invert and Eraser are not set */ 1612 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1613 1614 /* no further processing */ 1615 return; 1616 1617 case HID_DG_INRANGE: 1618 report->tool_active |= !!value; 1619 1620 if (report->tool_active) { 1621 /* 1622 * if tool is not set but is marked as active, 1623 * assume ours 1624 */ 1625 if (!report->tool) 1626 report->tool = usage->code; 1627 1628 /* drivers may have changed the value behind our back, resend it */ 1629 hid_report_set_tool(report, input, report->tool); 1630 } else { 1631 hid_report_release_tool(report, input, usage->code); 1632 } 1633 1634 /* reset tool_active for the next event */ 1635 report->tool_active = false; 1636 1637 /* no further processing */ 1638 return; 1639 1640 case HID_DG_TIPSWITCH: 1641 report->tool_active |= !!value; 1642 1643 /* if tool is set to RUBBER we should ignore the current value */ 1644 if (report->tool == BTN_TOOL_RUBBER) 1645 return; 1646 1647 break; 1648 1649 case HID_DG_TIPPRESSURE: 1650 if (*quirks & HID_QUIRK_NOTOUCH) { 1651 int a = field->logical_minimum; 1652 int b = field->logical_maximum; 1653 1654 if (value > a + ((b - a) >> 3)) { 1655 input_event(input, EV_KEY, BTN_TOUCH, 1); 1656 report->tool_active = true; 1657 } 1658 } 1659 break; 1660 1661 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1662 dbg_hid("Maximum Effects - %d\n",value); 1663 return; 1664 1665 case HID_UP_PID | 0x7fUL: 1666 dbg_hid("PID Pool Report\n"); 1667 return; 1668 } 1669 1670 switch (usage->type) { 1671 case EV_KEY: 1672 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1673 return; 1674 break; 1675 1676 case EV_REL: 1677 if (usage->code == REL_WHEEL_HI_RES || 1678 usage->code == REL_HWHEEL_HI_RES) { 1679 hidinput_handle_scroll(usage, input, value); 1680 return; 1681 } 1682 break; 1683 1684 case EV_ABS: 1685 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1686 usage->code == ABS_VOLUME) { 1687 int count = abs(value); 1688 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1689 int i; 1690 1691 for (i = 0; i < count; i++) { 1692 input_event(input, EV_KEY, direction, 1); 1693 input_sync(input); 1694 input_event(input, EV_KEY, direction, 0); 1695 input_sync(input); 1696 } 1697 return; 1698 1699 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1700 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1701 value = field->logical_maximum - value; 1702 break; 1703 } 1704 1705 /* 1706 * Ignore reports for absolute data if the data didn't change. This is 1707 * not only an optimization but also fixes 'dead' key reports. Some 1708 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1709 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1710 * can only have one of them physically available. The 'dead' keys 1711 * report constant 0. As all map to the same keycode, they'd confuse 1712 * the input layer. If we filter the 'dead' keys on the HID level, we 1713 * skip the keycode translation and only forward real events. 1714 */ 1715 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1716 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1717 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1718 usage->usage_index < field->maxusage && 1719 value == field->value[usage->usage_index]) 1720 return; 1721 1722 /* report the usage code as scancode if the key status has changed */ 1723 if (usage->type == EV_KEY && 1724 (!test_bit(usage->code, input->key)) == value) 1725 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1726 1727 input_event(input, usage->type, usage->code, value); 1728 1729 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1730 usage->type == EV_KEY && value) { 1731 input_sync(input); 1732 input_event(input, usage->type, usage->code, 0); 1733 } 1734 } 1735 1736 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1737 { 1738 struct hid_input *hidinput; 1739 1740 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1741 return; 1742 1743 list_for_each_entry(hidinput, &hid->inputs, list) 1744 input_sync(hidinput->input); 1745 } 1746 EXPORT_SYMBOL_GPL(hidinput_report_event); 1747 1748 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1749 unsigned int code, struct hid_field **field) 1750 { 1751 struct hid_report *report; 1752 int i, j; 1753 1754 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1755 for (i = 0; i < report->maxfield; i++) { 1756 *field = report->field[i]; 1757 for (j = 0; j < (*field)->maxusage; j++) 1758 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1759 return j; 1760 } 1761 } 1762 return -1; 1763 } 1764 1765 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1766 { 1767 struct hid_report *report; 1768 struct hid_field *field; 1769 int i, j; 1770 1771 list_for_each_entry(report, 1772 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1773 list) { 1774 for (i = 0; i < report->maxfield; i++) { 1775 field = report->field[i]; 1776 for (j = 0; j < field->maxusage; j++) 1777 if (field->usage[j].type == EV_LED) 1778 return field; 1779 } 1780 } 1781 return NULL; 1782 } 1783 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1784 1785 unsigned int hidinput_count_leds(struct hid_device *hid) 1786 { 1787 struct hid_report *report; 1788 struct hid_field *field; 1789 int i, j; 1790 unsigned int count = 0; 1791 1792 list_for_each_entry(report, 1793 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1794 list) { 1795 for (i = 0; i < report->maxfield; i++) { 1796 field = report->field[i]; 1797 for (j = 0; j < field->maxusage; j++) 1798 if (field->usage[j].type == EV_LED && 1799 field->value[j]) 1800 count += 1; 1801 } 1802 } 1803 return count; 1804 } 1805 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1806 1807 static void hidinput_led_worker(struct work_struct *work) 1808 { 1809 struct hid_device *hid = container_of(work, struct hid_device, 1810 led_work); 1811 struct hid_field *field; 1812 struct hid_report *report; 1813 int ret; 1814 u32 len; 1815 __u8 *buf; 1816 1817 field = hidinput_get_led_field(hid); 1818 if (!field) 1819 return; 1820 1821 /* 1822 * field->report is accessed unlocked regarding HID core. So there might 1823 * be another incoming SET-LED request from user-space, which changes 1824 * the LED state while we assemble our outgoing buffer. However, this 1825 * doesn't matter as hid_output_report() correctly converts it into a 1826 * boolean value no matter what information is currently set on the LED 1827 * field (even garbage). So the remote device will always get a valid 1828 * request. 1829 * And in case we send a wrong value, a next led worker is spawned 1830 * for every SET-LED request so the following worker will send the 1831 * correct value, guaranteed! 1832 */ 1833 1834 report = field->report; 1835 1836 /* use custom SET_REPORT request if possible (asynchronous) */ 1837 if (hid->ll_driver->request) 1838 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1839 1840 /* fall back to generic raw-output-report */ 1841 len = hid_report_len(report); 1842 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1843 if (!buf) 1844 return; 1845 1846 hid_output_report(report, buf); 1847 /* synchronous output report */ 1848 ret = hid_hw_output_report(hid, buf, len); 1849 if (ret == -ENOSYS) 1850 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1851 HID_REQ_SET_REPORT); 1852 kfree(buf); 1853 } 1854 1855 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1856 unsigned int code, int value) 1857 { 1858 struct hid_device *hid = input_get_drvdata(dev); 1859 struct hid_field *field; 1860 int offset; 1861 1862 if (type == EV_FF) 1863 return input_ff_event(dev, type, code, value); 1864 1865 if (type != EV_LED) 1866 return -1; 1867 1868 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1869 hid_warn(dev, "event field not found\n"); 1870 return -1; 1871 } 1872 1873 hid_set_field(field, offset, value); 1874 1875 schedule_work(&hid->led_work); 1876 return 0; 1877 } 1878 1879 static int hidinput_open(struct input_dev *dev) 1880 { 1881 struct hid_device *hid = input_get_drvdata(dev); 1882 1883 return hid_hw_open(hid); 1884 } 1885 1886 static void hidinput_close(struct input_dev *dev) 1887 { 1888 struct hid_device *hid = input_get_drvdata(dev); 1889 1890 hid_hw_close(hid); 1891 } 1892 1893 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1894 struct hid_report *report, bool use_logical_max) 1895 { 1896 struct hid_usage *usage; 1897 bool update_needed = false; 1898 bool get_report_completed = false; 1899 int i, j; 1900 1901 if (report->maxfield == 0) 1902 return false; 1903 1904 for (i = 0; i < report->maxfield; i++) { 1905 __s32 value = use_logical_max ? 1906 report->field[i]->logical_maximum : 1907 report->field[i]->logical_minimum; 1908 1909 /* There is no good reason for a Resolution 1910 * Multiplier to have a count other than 1. 1911 * Ignore that case. 1912 */ 1913 if (report->field[i]->report_count != 1) 1914 continue; 1915 1916 for (j = 0; j < report->field[i]->maxusage; j++) { 1917 usage = &report->field[i]->usage[j]; 1918 1919 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1920 continue; 1921 1922 /* 1923 * If we have more than one feature within this 1924 * report we need to fill in the bits from the 1925 * others before we can overwrite the ones for the 1926 * Resolution Multiplier. 1927 * 1928 * But if we're not allowed to read from the device, 1929 * we just bail. Such a device should not exist 1930 * anyway. 1931 */ 1932 if (!get_report_completed && report->maxfield > 1) { 1933 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1934 return update_needed; 1935 1936 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1937 hid_hw_wait(hid); 1938 get_report_completed = true; 1939 } 1940 1941 report->field[i]->value[j] = value; 1942 update_needed = true; 1943 } 1944 } 1945 1946 return update_needed; 1947 } 1948 1949 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1950 { 1951 struct hid_report_enum *rep_enum; 1952 struct hid_report *rep; 1953 int ret; 1954 1955 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1956 list_for_each_entry(rep, &rep_enum->report_list, list) { 1957 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1958 rep, true); 1959 1960 if (update_needed) { 1961 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1962 if (ret) { 1963 __hidinput_change_resolution_multipliers(hid, 1964 rep, false); 1965 return; 1966 } 1967 } 1968 } 1969 1970 /* refresh our structs */ 1971 hid_setup_resolution_multiplier(hid); 1972 } 1973 1974 static void report_features(struct hid_device *hid) 1975 { 1976 struct hid_driver *drv = hid->driver; 1977 struct hid_report_enum *rep_enum; 1978 struct hid_report *rep; 1979 struct hid_usage *usage; 1980 int i, j; 1981 1982 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1983 list_for_each_entry(rep, &rep_enum->report_list, list) 1984 for (i = 0; i < rep->maxfield; i++) { 1985 /* Ignore if report count is out of bounds. */ 1986 if (rep->field[i]->report_count < 1) 1987 continue; 1988 1989 for (j = 0; j < rep->field[i]->maxusage; j++) { 1990 usage = &rep->field[i]->usage[j]; 1991 1992 /* Verify if Battery Strength feature is available */ 1993 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1994 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1995 rep->field[i], false); 1996 1997 if (drv->feature_mapping) 1998 drv->feature_mapping(hid, rep->field[i], usage); 1999 } 2000 } 2001 } 2002 2003 static struct hid_input *hidinput_allocate(struct hid_device *hid, 2004 unsigned int application) 2005 { 2006 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 2007 struct input_dev *input_dev = input_allocate_device(); 2008 const char *suffix = NULL; 2009 size_t suffix_len, name_len; 2010 2011 if (!hidinput || !input_dev) 2012 goto fail; 2013 2014 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 2015 hid->maxapplication > 1) { 2016 switch (application) { 2017 case HID_GD_KEYBOARD: 2018 suffix = "Keyboard"; 2019 break; 2020 case HID_GD_KEYPAD: 2021 suffix = "Keypad"; 2022 break; 2023 case HID_GD_MOUSE: 2024 suffix = "Mouse"; 2025 break; 2026 case HID_DG_PEN: 2027 /* 2028 * yes, there is an issue here: 2029 * DG_PEN -> "Stylus" 2030 * DG_STYLUS -> "Pen" 2031 * But changing this now means users with config snippets 2032 * will have to change it and the test suite will not be happy. 2033 */ 2034 suffix = "Stylus"; 2035 break; 2036 case HID_DG_STYLUS: 2037 suffix = "Pen"; 2038 break; 2039 case HID_DG_TOUCHSCREEN: 2040 suffix = "Touchscreen"; 2041 break; 2042 case HID_DG_TOUCHPAD: 2043 suffix = "Touchpad"; 2044 break; 2045 case HID_GD_SYSTEM_CONTROL: 2046 suffix = "System Control"; 2047 break; 2048 case HID_CP_CONSUMER_CONTROL: 2049 suffix = "Consumer Control"; 2050 break; 2051 case HID_GD_WIRELESS_RADIO_CTLS: 2052 suffix = "Wireless Radio Control"; 2053 break; 2054 case HID_GD_SYSTEM_MULTIAXIS: 2055 suffix = "System Multi Axis"; 2056 break; 2057 default: 2058 break; 2059 } 2060 } 2061 2062 if (suffix) { 2063 name_len = strlen(hid->name); 2064 suffix_len = strlen(suffix); 2065 if ((name_len < suffix_len) || 2066 strcmp(hid->name + name_len - suffix_len, suffix)) { 2067 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 2068 hid->name, suffix); 2069 if (!hidinput->name) 2070 goto fail; 2071 } 2072 } 2073 2074 input_set_drvdata(input_dev, hid); 2075 input_dev->event = hidinput_input_event; 2076 input_dev->open = hidinput_open; 2077 input_dev->close = hidinput_close; 2078 input_dev->setkeycode = hidinput_setkeycode; 2079 input_dev->getkeycode = hidinput_getkeycode; 2080 2081 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2082 input_dev->phys = hid->phys; 2083 input_dev->uniq = hid->uniq; 2084 input_dev->id.bustype = hid->bus; 2085 input_dev->id.vendor = hid->vendor; 2086 input_dev->id.product = hid->product; 2087 input_dev->id.version = hid->version; 2088 input_dev->dev.parent = &hid->dev; 2089 2090 hidinput->input = input_dev; 2091 hidinput->application = application; 2092 list_add_tail(&hidinput->list, &hid->inputs); 2093 2094 INIT_LIST_HEAD(&hidinput->reports); 2095 2096 return hidinput; 2097 2098 fail: 2099 kfree(hidinput); 2100 input_free_device(input_dev); 2101 hid_err(hid, "Out of memory during hid input probe\n"); 2102 return NULL; 2103 } 2104 2105 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2106 { 2107 int i; 2108 unsigned long r = 0; 2109 2110 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2111 r |= hidinput->input->evbit[i]; 2112 2113 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2114 r |= hidinput->input->keybit[i]; 2115 2116 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2117 r |= hidinput->input->relbit[i]; 2118 2119 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2120 r |= hidinput->input->absbit[i]; 2121 2122 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2123 r |= hidinput->input->mscbit[i]; 2124 2125 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2126 r |= hidinput->input->ledbit[i]; 2127 2128 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2129 r |= hidinput->input->sndbit[i]; 2130 2131 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2132 r |= hidinput->input->ffbit[i]; 2133 2134 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2135 r |= hidinput->input->swbit[i]; 2136 2137 return !!r; 2138 } 2139 2140 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2141 struct hid_input *hidinput) 2142 { 2143 struct hid_report *report; 2144 int i, k; 2145 2146 list_del(&hidinput->list); 2147 input_free_device(hidinput->input); 2148 kfree(hidinput->name); 2149 2150 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2151 if (k == HID_OUTPUT_REPORT && 2152 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2153 continue; 2154 2155 list_for_each_entry(report, &hid->report_enum[k].report_list, 2156 list) { 2157 2158 for (i = 0; i < report->maxfield; i++) 2159 if (report->field[i]->hidinput == hidinput) 2160 report->field[i]->hidinput = NULL; 2161 } 2162 } 2163 2164 kfree(hidinput); 2165 } 2166 2167 static struct hid_input *hidinput_match(struct hid_report *report) 2168 { 2169 struct hid_device *hid = report->device; 2170 struct hid_input *hidinput; 2171 2172 list_for_each_entry(hidinput, &hid->inputs, list) { 2173 if (hidinput->report && 2174 hidinput->report->id == report->id) 2175 return hidinput; 2176 } 2177 2178 return NULL; 2179 } 2180 2181 static struct hid_input *hidinput_match_application(struct hid_report *report) 2182 { 2183 struct hid_device *hid = report->device; 2184 struct hid_input *hidinput; 2185 2186 list_for_each_entry(hidinput, &hid->inputs, list) { 2187 if (hidinput->application == report->application) 2188 return hidinput; 2189 2190 /* 2191 * Keep SystemControl and ConsumerControl applications together 2192 * with the main keyboard, if present. 2193 */ 2194 if ((report->application == HID_GD_SYSTEM_CONTROL || 2195 report->application == HID_CP_CONSUMER_CONTROL) && 2196 hidinput->application == HID_GD_KEYBOARD) { 2197 return hidinput; 2198 } 2199 } 2200 2201 return NULL; 2202 } 2203 2204 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2205 struct hid_report *report) 2206 { 2207 int i, j, k; 2208 int first_field_index = 0; 2209 int slot_collection_index = -1; 2210 int prev_collection_index = -1; 2211 unsigned int slot_idx = 0; 2212 struct hid_field *field; 2213 2214 /* 2215 * First tag all the fields that are part of a slot, 2216 * a slot needs to have one Contact ID in the collection 2217 */ 2218 for (i = 0; i < report->maxfield; i++) { 2219 field = report->field[i]; 2220 2221 /* ignore fields without usage */ 2222 if (field->maxusage < 1) 2223 continue; 2224 2225 /* 2226 * janitoring when collection_index changes 2227 */ 2228 if (prev_collection_index != field->usage->collection_index) { 2229 prev_collection_index = field->usage->collection_index; 2230 first_field_index = i; 2231 } 2232 2233 /* 2234 * if we already found a Contact ID in the collection, 2235 * tag and continue to the next. 2236 */ 2237 if (slot_collection_index == field->usage->collection_index) { 2238 field->slot_idx = slot_idx; 2239 continue; 2240 } 2241 2242 /* check if the current field has Contact ID */ 2243 for (j = 0; j < field->maxusage; j++) { 2244 if (field->usage[j].hid == HID_DG_CONTACTID) { 2245 slot_collection_index = field->usage->collection_index; 2246 slot_idx++; 2247 2248 /* 2249 * mark all previous fields and this one in the 2250 * current collection to be slotted. 2251 */ 2252 for (k = first_field_index; k <= i; k++) 2253 report->field[k]->slot_idx = slot_idx; 2254 break; 2255 } 2256 } 2257 } 2258 2259 for (i = 0; i < report->maxfield; i++) 2260 for (j = 0; j < report->field[i]->maxusage; j++) 2261 hidinput_configure_usage(hidinput, report->field[i], 2262 report->field[i]->usage + j, 2263 j); 2264 } 2265 2266 /* 2267 * Register the input device; print a message. 2268 * Configure the input layer interface 2269 * Read all reports and initialize the absolute field values. 2270 */ 2271 2272 int hidinput_connect(struct hid_device *hid, unsigned int force) 2273 { 2274 struct hid_driver *drv = hid->driver; 2275 struct hid_report *report; 2276 struct hid_input *next, *hidinput = NULL; 2277 unsigned int application; 2278 int i, k; 2279 2280 INIT_LIST_HEAD(&hid->inputs); 2281 INIT_WORK(&hid->led_work, hidinput_led_worker); 2282 2283 hid->status &= ~HID_STAT_DUP_DETECTED; 2284 2285 if (!force) { 2286 for (i = 0; i < hid->maxcollection; i++) { 2287 struct hid_collection *col = &hid->collection[i]; 2288 if (col->type == HID_COLLECTION_APPLICATION || 2289 col->type == HID_COLLECTION_PHYSICAL) 2290 if (IS_INPUT_APPLICATION(col->usage)) 2291 break; 2292 } 2293 2294 if (i == hid->maxcollection) 2295 return -1; 2296 } 2297 2298 report_features(hid); 2299 2300 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2301 if (k == HID_OUTPUT_REPORT && 2302 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2303 continue; 2304 2305 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2306 2307 if (!report->maxfield) 2308 continue; 2309 2310 application = report->application; 2311 2312 /* 2313 * Find the previous hidinput report attached 2314 * to this report id. 2315 */ 2316 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2317 hidinput = hidinput_match(report); 2318 else if (hid->maxapplication > 1 && 2319 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2320 hidinput = hidinput_match_application(report); 2321 2322 if (!hidinput) { 2323 hidinput = hidinput_allocate(hid, application); 2324 if (!hidinput) 2325 goto out_unwind; 2326 } 2327 2328 hidinput_configure_usages(hidinput, report); 2329 2330 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2331 hidinput->report = report; 2332 2333 list_add_tail(&report->hidinput_list, 2334 &hidinput->reports); 2335 } 2336 } 2337 2338 hidinput_change_resolution_multipliers(hid); 2339 2340 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2341 if (drv->input_configured && 2342 drv->input_configured(hid, hidinput)) 2343 goto out_unwind; 2344 2345 if (!hidinput_has_been_populated(hidinput)) { 2346 /* no need to register an input device not populated */ 2347 hidinput_cleanup_hidinput(hid, hidinput); 2348 continue; 2349 } 2350 2351 if (input_register_device(hidinput->input)) 2352 goto out_unwind; 2353 hidinput->registered = true; 2354 } 2355 2356 if (list_empty(&hid->inputs)) { 2357 hid_dbg(hid, "No inputs registered, leaving\n"); 2358 goto out_unwind; 2359 } 2360 2361 if (hid->status & HID_STAT_DUP_DETECTED) 2362 hid_dbg(hid, 2363 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2364 2365 return 0; 2366 2367 out_unwind: 2368 /* unwind the ones we already registered */ 2369 hidinput_disconnect(hid); 2370 2371 return -1; 2372 } 2373 EXPORT_SYMBOL_GPL(hidinput_connect); 2374 2375 void hidinput_disconnect(struct hid_device *hid) 2376 { 2377 struct hid_input *hidinput, *next; 2378 2379 hidinput_cleanup_battery(hid); 2380 2381 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2382 list_del(&hidinput->list); 2383 if (hidinput->registered) 2384 input_unregister_device(hidinput->input); 2385 else 2386 input_free_device(hidinput->input); 2387 kfree(hidinput->name); 2388 kfree(hidinput); 2389 } 2390 2391 /* led_work is spawned by input_dev callbacks, but doesn't access the 2392 * parent input_dev at all. Once all input devices are removed, we 2393 * know that led_work will never get restarted, so we can cancel it 2394 * synchronously and are safe. */ 2395 cancel_work_sync(&hid->led_work); 2396 } 2397 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2398 2399 #ifdef CONFIG_HID_KUNIT_TEST 2400 #include "hid-input-test.c" 2401 #endif 2402