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 default: 307 return 0; 308 } 309 310 /* Apply negative unit exponent */ 311 for (; unit_exponent < 0; unit_exponent++) { 312 prev = logical_extents; 313 logical_extents *= 10; 314 if (logical_extents < prev) 315 return 0; 316 } 317 /* Apply positive unit exponent */ 318 for (; unit_exponent > 0; unit_exponent--) { 319 prev = physical_extents; 320 physical_extents *= 10; 321 if (physical_extents < prev) 322 return 0; 323 } 324 325 /* Calculate resolution */ 326 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 327 } 328 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 329 330 #ifdef CONFIG_HID_BATTERY_STRENGTH 331 static enum power_supply_property hidinput_battery_props[] = { 332 POWER_SUPPLY_PROP_PRESENT, 333 POWER_SUPPLY_PROP_ONLINE, 334 POWER_SUPPLY_PROP_CAPACITY, 335 POWER_SUPPLY_PROP_MODEL_NAME, 336 POWER_SUPPLY_PROP_STATUS, 337 POWER_SUPPLY_PROP_SCOPE, 338 }; 339 340 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 341 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 342 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 343 #define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */ 344 345 static const struct hid_device_id hid_battery_quirks[] = { 346 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 347 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 348 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 349 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 350 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 351 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 352 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 353 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 354 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 355 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 356 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 357 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 358 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 359 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 360 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 361 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 362 USB_DEVICE_ID_APPLE_MAGICTRACKPAD), 363 HID_BATTERY_QUIRK_IGNORE }, 364 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 365 USB_DEVICE_ID_ELECOM_BM084), 366 HID_BATTERY_QUIRK_IGNORE }, 367 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 368 USB_DEVICE_ID_SYMBOL_SCANNER_3), 369 HID_BATTERY_QUIRK_IGNORE }, 370 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 371 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 372 HID_BATTERY_QUIRK_IGNORE }, 373 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 374 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 375 HID_BATTERY_QUIRK_IGNORE }, 376 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 377 HID_BATTERY_QUIRK_IGNORE }, 378 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN), 379 HID_BATTERY_QUIRK_IGNORE }, 380 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L), 381 HID_BATTERY_QUIRK_AVOID_QUERY }, 382 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW), 383 HID_BATTERY_QUIRK_AVOID_QUERY }, 384 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW), 385 HID_BATTERY_QUIRK_AVOID_QUERY }, 386 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_CHROMEBOOK_TROGDOR_POMPOM), 387 HID_BATTERY_QUIRK_AVOID_QUERY }, 388 /* 389 * Elan I2C-HID touchscreens seem to all report a non present battery, 390 * set HID_BATTERY_QUIRK_IGNORE for all Elan I2C-HID devices. 391 */ 392 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, HID_ANY_ID), HID_BATTERY_QUIRK_IGNORE }, 393 {} 394 }; 395 396 static unsigned find_battery_quirk(struct hid_device *hdev) 397 { 398 unsigned quirks = 0; 399 const struct hid_device_id *match; 400 401 match = hid_match_id(hdev, hid_battery_quirks); 402 if (match != NULL) 403 quirks = match->driver_data; 404 405 return quirks; 406 } 407 408 static int hidinput_scale_battery_capacity(struct hid_device *dev, 409 int value) 410 { 411 if (dev->battery_min < dev->battery_max && 412 value >= dev->battery_min && value <= dev->battery_max) 413 value = ((value - dev->battery_min) * 100) / 414 (dev->battery_max - dev->battery_min); 415 416 return value; 417 } 418 419 static int hidinput_query_battery_capacity(struct hid_device *dev) 420 { 421 u8 *buf; 422 int ret; 423 424 buf = kmalloc(4, GFP_KERNEL); 425 if (!buf) 426 return -ENOMEM; 427 428 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 429 dev->battery_report_type, HID_REQ_GET_REPORT); 430 if (ret < 2) { 431 kfree(buf); 432 return -ENODATA; 433 } 434 435 ret = hidinput_scale_battery_capacity(dev, buf[1]); 436 kfree(buf); 437 return ret; 438 } 439 440 static int hidinput_get_battery_property(struct power_supply *psy, 441 enum power_supply_property prop, 442 union power_supply_propval *val) 443 { 444 struct hid_device *dev = power_supply_get_drvdata(psy); 445 int value; 446 int ret = 0; 447 448 switch (prop) { 449 case POWER_SUPPLY_PROP_PRESENT: 450 case POWER_SUPPLY_PROP_ONLINE: 451 val->intval = 1; 452 break; 453 454 case POWER_SUPPLY_PROP_CAPACITY: 455 if (dev->battery_status != HID_BATTERY_REPORTED && 456 !dev->battery_avoid_query) { 457 value = hidinput_query_battery_capacity(dev); 458 if (value < 0) 459 return value; 460 } else { 461 value = dev->battery_capacity; 462 } 463 464 val->intval = value; 465 break; 466 467 case POWER_SUPPLY_PROP_MODEL_NAME: 468 val->strval = dev->name; 469 break; 470 471 case POWER_SUPPLY_PROP_STATUS: 472 if (dev->battery_status != HID_BATTERY_REPORTED && 473 !dev->battery_avoid_query) { 474 value = hidinput_query_battery_capacity(dev); 475 if (value < 0) 476 return value; 477 478 dev->battery_capacity = value; 479 dev->battery_status = HID_BATTERY_QUERIED; 480 } 481 482 if (dev->battery_status == HID_BATTERY_UNKNOWN) 483 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 484 else 485 val->intval = dev->battery_charge_status; 486 break; 487 488 case POWER_SUPPLY_PROP_SCOPE: 489 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 490 break; 491 492 default: 493 ret = -EINVAL; 494 break; 495 } 496 497 return ret; 498 } 499 500 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 501 struct hid_field *field, bool is_percentage) 502 { 503 struct power_supply_desc *psy_desc; 504 struct power_supply_config psy_cfg = { .drv_data = dev, }; 505 unsigned quirks; 506 s32 min, max; 507 int error; 508 509 if (dev->battery) 510 return 0; /* already initialized? */ 511 512 quirks = find_battery_quirk(dev); 513 514 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 515 dev->bus, dev->vendor, dev->product, dev->version, quirks); 516 517 if (quirks & HID_BATTERY_QUIRK_IGNORE) 518 return 0; 519 520 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 521 if (!psy_desc) 522 return -ENOMEM; 523 524 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 525 strlen(dev->uniq) ? 526 dev->uniq : dev_name(&dev->dev)); 527 if (!psy_desc->name) { 528 error = -ENOMEM; 529 goto err_free_mem; 530 } 531 532 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 533 psy_desc->properties = hidinput_battery_props; 534 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 535 psy_desc->use_for_apm = 0; 536 psy_desc->get_property = hidinput_get_battery_property; 537 538 min = field->logical_minimum; 539 max = field->logical_maximum; 540 541 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 542 min = 0; 543 max = 100; 544 } 545 546 if (quirks & HID_BATTERY_QUIRK_FEATURE) 547 report_type = HID_FEATURE_REPORT; 548 549 dev->battery_min = min; 550 dev->battery_max = max; 551 dev->battery_report_type = report_type; 552 dev->battery_report_id = field->report->id; 553 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 554 555 /* 556 * Stylus is normally not connected to the device and thus we 557 * can't query the device and get meaningful battery strength. 558 * We have to wait for the device to report it on its own. 559 */ 560 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 561 field->physical == HID_DG_STYLUS; 562 563 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 564 dev->battery_avoid_query = true; 565 566 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 567 if (IS_ERR(dev->battery)) { 568 error = PTR_ERR(dev->battery); 569 hid_warn(dev, "can't register power supply: %d\n", error); 570 goto err_free_name; 571 } 572 573 power_supply_powers(dev->battery, &dev->dev); 574 return 0; 575 576 err_free_name: 577 kfree(psy_desc->name); 578 err_free_mem: 579 kfree(psy_desc); 580 dev->battery = NULL; 581 return error; 582 } 583 584 static void hidinput_cleanup_battery(struct hid_device *dev) 585 { 586 const struct power_supply_desc *psy_desc; 587 588 if (!dev->battery) 589 return; 590 591 psy_desc = dev->battery->desc; 592 power_supply_unregister(dev->battery); 593 kfree(psy_desc->name); 594 kfree(psy_desc); 595 dev->battery = NULL; 596 } 597 598 static bool hidinput_update_battery_charge_status(struct hid_device *dev, 599 unsigned int usage, int value) 600 { 601 switch (usage) { 602 case HID_BAT_CHARGING: 603 dev->battery_charge_status = value ? 604 POWER_SUPPLY_STATUS_CHARGING : 605 POWER_SUPPLY_STATUS_DISCHARGING; 606 return true; 607 } 608 609 return false; 610 } 611 612 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage, 613 int value) 614 { 615 int capacity; 616 617 if (!dev->battery) 618 return; 619 620 if (hidinput_update_battery_charge_status(dev, usage, value)) { 621 power_supply_changed(dev->battery); 622 return; 623 } 624 625 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 626 return; 627 628 capacity = hidinput_scale_battery_capacity(dev, value); 629 630 if (dev->battery_status != HID_BATTERY_REPORTED || 631 capacity != dev->battery_capacity || 632 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 633 dev->battery_capacity = capacity; 634 dev->battery_status = HID_BATTERY_REPORTED; 635 dev->battery_ratelimit_time = 636 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 637 power_supply_changed(dev->battery); 638 } 639 } 640 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 641 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 642 struct hid_field *field, bool is_percentage) 643 { 644 return 0; 645 } 646 647 static void hidinput_cleanup_battery(struct hid_device *dev) 648 { 649 } 650 651 static void hidinput_update_battery(struct hid_device *dev, unsigned int usage, 652 int value) 653 { 654 } 655 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 656 657 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 658 unsigned int type, unsigned int usage) 659 { 660 struct hid_collection *collection; 661 662 collection = &device->collection[field->usage->collection_index]; 663 664 return collection->type == type && collection->usage == usage; 665 } 666 667 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 668 struct hid_usage *usage, unsigned int usage_index) 669 { 670 struct input_dev *input = hidinput->input; 671 struct hid_device *device = input_get_drvdata(input); 672 const struct usage_priority *usage_priority = NULL; 673 int max = 0, code; 674 unsigned int i = 0; 675 unsigned long *bit = NULL; 676 677 field->hidinput = hidinput; 678 679 if (field->flags & HID_MAIN_ITEM_CONSTANT) 680 goto ignore; 681 682 /* Ignore if report count is out of bounds. */ 683 if (field->report_count < 1) 684 goto ignore; 685 686 /* only LED usages are supported in output fields */ 687 if (field->report_type == HID_OUTPUT_REPORT && 688 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 689 goto ignore; 690 } 691 692 /* assign a priority based on the static list declared here */ 693 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 694 if (usage->hid == hidinput_usages_priorities[i].usage) { 695 usage_priority = &hidinput_usages_priorities[i]; 696 697 field->usages_priorities[usage_index] = 698 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 699 break; 700 } 701 } 702 703 /* 704 * For slotted devices, we need to also add the slot index 705 * in the priority. 706 */ 707 if (usage_priority && usage_priority->global) 708 field->usages_priorities[usage_index] |= 709 usage_priority->slot_overwrite; 710 else 711 field->usages_priorities[usage_index] |= 712 (0xff - field->slot_idx) << 16; 713 714 if (device->driver->input_mapping) { 715 int ret = device->driver->input_mapping(device, hidinput, field, 716 usage, &bit, &max); 717 if (ret > 0) 718 goto mapped; 719 if (ret < 0) 720 goto ignore; 721 } 722 723 switch (usage->hid & HID_USAGE_PAGE) { 724 case HID_UP_UNDEFINED: 725 goto ignore; 726 727 case HID_UP_KEYBOARD: 728 set_bit(EV_REP, input->evbit); 729 730 if ((usage->hid & HID_USAGE) < 256) { 731 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 732 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 733 } else 734 map_key(KEY_UNKNOWN); 735 736 break; 737 738 case HID_UP_BUTTON: 739 code = ((usage->hid - 1) & HID_USAGE); 740 741 switch (field->application) { 742 case HID_GD_MOUSE: 743 case HID_GD_POINTER: code += BTN_MOUSE; break; 744 case HID_GD_JOYSTICK: 745 if (code <= 0xf) 746 code += BTN_JOYSTICK; 747 else 748 code += BTN_TRIGGER_HAPPY - 0x10; 749 break; 750 case HID_GD_GAMEPAD: 751 if (code <= 0xf) 752 code += BTN_GAMEPAD; 753 else 754 code += BTN_TRIGGER_HAPPY - 0x10; 755 break; 756 case HID_CP_CONSUMER_CONTROL: 757 if (hidinput_field_in_collection(device, field, 758 HID_COLLECTION_NAMED_ARRAY, 759 HID_CP_PROGRAMMABLEBUTTONS)) { 760 if (code <= 0x1d) 761 code += KEY_MACRO1; 762 else 763 code += BTN_TRIGGER_HAPPY - 0x1e; 764 break; 765 } 766 fallthrough; 767 default: 768 switch (field->physical) { 769 case HID_GD_MOUSE: 770 case HID_GD_POINTER: code += BTN_MOUSE; break; 771 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 772 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 773 default: code += BTN_MISC; 774 } 775 } 776 777 map_key(code); 778 break; 779 780 case HID_UP_SIMULATION: 781 switch (usage->hid & 0xffff) { 782 case 0xba: map_abs(ABS_RUDDER); break; 783 case 0xbb: map_abs(ABS_THROTTLE); break; 784 case 0xc4: map_abs(ABS_GAS); break; 785 case 0xc5: map_abs(ABS_BRAKE); break; 786 case 0xc8: map_abs(ABS_WHEEL); break; 787 default: goto ignore; 788 } 789 break; 790 791 case HID_UP_GENDESK: 792 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 793 switch (usage->hid & 0xf) { 794 case 0x1: map_key_clear(KEY_POWER); break; 795 case 0x2: map_key_clear(KEY_SLEEP); break; 796 case 0x3: map_key_clear(KEY_WAKEUP); break; 797 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 798 case 0x5: map_key_clear(KEY_MENU); break; 799 case 0x6: map_key_clear(KEY_PROG1); break; 800 case 0x7: map_key_clear(KEY_HELP); break; 801 case 0x8: map_key_clear(KEY_EXIT); break; 802 case 0x9: map_key_clear(KEY_SELECT); break; 803 case 0xa: map_key_clear(KEY_RIGHT); break; 804 case 0xb: map_key_clear(KEY_LEFT); break; 805 case 0xc: map_key_clear(KEY_UP); break; 806 case 0xd: map_key_clear(KEY_DOWN); break; 807 case 0xe: map_key_clear(KEY_POWER2); break; 808 case 0xf: map_key_clear(KEY_RESTART); break; 809 default: goto unknown; 810 } 811 break; 812 } 813 814 if ((usage->hid & 0xf0) == 0x90) { /* SystemControl & D-pad */ 815 switch (usage->hid) { 816 case HID_GD_UP: usage->hat_dir = 1; break; 817 case HID_GD_DOWN: usage->hat_dir = 5; break; 818 case HID_GD_RIGHT: usage->hat_dir = 3; break; 819 case HID_GD_LEFT: usage->hat_dir = 7; break; 820 case HID_GD_DO_NOT_DISTURB: 821 map_key_clear(KEY_DO_NOT_DISTURB); break; 822 default: goto unknown; 823 } 824 825 if (usage->hid <= HID_GD_LEFT) { 826 if (field->dpad) { 827 map_abs(field->dpad); 828 goto ignore; 829 } 830 map_abs(ABS_HAT0X); 831 } 832 break; 833 } 834 835 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */ 836 switch (usage->hid & 0xf) { 837 case 0x9: map_key_clear(KEY_MICMUTE); break; 838 case 0xa: map_key_clear(KEY_ACCESSIBILITY); break; 839 default: goto ignore; 840 } 841 break; 842 } 843 844 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 845 switch (usage->hid & 0xf) { 846 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 847 default: goto ignore; 848 } 849 break; 850 } 851 852 /* 853 * Some lazy vendors declare 255 usages for System Control, 854 * leading to the creation of ABS_X|Y axis and too many others. 855 * It wouldn't be a problem if joydev doesn't consider the 856 * device as a joystick then. 857 */ 858 if (field->application == HID_GD_SYSTEM_CONTROL) 859 goto ignore; 860 861 switch (usage->hid) { 862 /* These usage IDs map directly to the usage codes. */ 863 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 864 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 865 if (field->flags & HID_MAIN_ITEM_RELATIVE) 866 map_rel(usage->hid & 0xf); 867 else 868 map_abs_clear(usage->hid & 0xf); 869 break; 870 871 case HID_GD_WHEEL: 872 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 873 set_bit(REL_WHEEL, input->relbit); 874 map_rel(REL_WHEEL_HI_RES); 875 } else { 876 map_abs(usage->hid & 0xf); 877 } 878 break; 879 case HID_GD_SLIDER: case HID_GD_DIAL: 880 if (field->flags & HID_MAIN_ITEM_RELATIVE) 881 map_rel(usage->hid & 0xf); 882 else 883 map_abs(usage->hid & 0xf); 884 break; 885 886 case HID_GD_HATSWITCH: 887 usage->hat_min = field->logical_minimum; 888 usage->hat_max = field->logical_maximum; 889 map_abs(ABS_HAT0X); 890 break; 891 892 case HID_GD_START: map_key_clear(BTN_START); break; 893 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 894 895 case HID_GD_RFKILL_BTN: 896 /* MS wireless radio ctl extension, also check CA */ 897 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 898 map_key_clear(KEY_RFKILL); 899 /* We need to simulate the btn release */ 900 field->flags |= HID_MAIN_ITEM_RELATIVE; 901 break; 902 } 903 goto unknown; 904 905 default: goto unknown; 906 } 907 908 break; 909 910 case HID_UP_LED: 911 switch (usage->hid & 0xffff) { /* HID-Value: */ 912 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 913 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 914 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 915 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 916 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 917 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 918 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 919 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 920 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 921 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 922 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 923 924 default: goto ignore; 925 } 926 break; 927 928 case HID_UP_DIGITIZER: 929 if ((field->application & 0xff) == 0x01) /* Digitizer */ 930 __set_bit(INPUT_PROP_POINTER, input->propbit); 931 else if ((field->application & 0xff) == 0x02) /* Pen */ 932 __set_bit(INPUT_PROP_DIRECT, input->propbit); 933 934 switch (usage->hid & 0xff) { 935 case 0x00: /* Undefined */ 936 goto ignore; 937 938 case 0x30: /* TipPressure */ 939 if (!test_bit(BTN_TOUCH, input->keybit)) { 940 device->quirks |= HID_QUIRK_NOTOUCH; 941 set_bit(EV_KEY, input->evbit); 942 set_bit(BTN_TOUCH, input->keybit); 943 } 944 map_abs_clear(ABS_PRESSURE); 945 break; 946 947 case 0x32: /* InRange */ 948 switch (field->physical) { 949 case HID_DG_PUCK: 950 map_key(BTN_TOOL_MOUSE); 951 break; 952 case HID_DG_FINGER: 953 map_key(BTN_TOOL_FINGER); 954 break; 955 default: 956 /* 957 * If the physical is not given, 958 * rely on the application. 959 */ 960 if (!field->physical) { 961 switch (field->application) { 962 case HID_DG_TOUCHSCREEN: 963 case HID_DG_TOUCHPAD: 964 map_key_clear(BTN_TOOL_FINGER); 965 break; 966 default: 967 map_key_clear(BTN_TOOL_PEN); 968 } 969 } else { 970 map_key(BTN_TOOL_PEN); 971 } 972 break; 973 } 974 break; 975 976 case 0x3b: /* Battery Strength */ 977 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 978 usage->type = EV_PWR; 979 return; 980 981 case 0x3c: /* Invert */ 982 device->quirks &= ~HID_QUIRK_NOINVERT; 983 map_key_clear(BTN_TOOL_RUBBER); 984 break; 985 986 case 0x3d: /* X Tilt */ 987 map_abs_clear(ABS_TILT_X); 988 break; 989 990 case 0x3e: /* Y Tilt */ 991 map_abs_clear(ABS_TILT_Y); 992 break; 993 994 case 0x33: /* Touch */ 995 case 0x42: /* TipSwitch */ 996 case 0x43: /* TipSwitch2 */ 997 device->quirks &= ~HID_QUIRK_NOTOUCH; 998 map_key_clear(BTN_TOUCH); 999 break; 1000 1001 case 0x44: /* BarrelSwitch */ 1002 map_key_clear(BTN_STYLUS); 1003 break; 1004 1005 case 0x45: /* ERASER */ 1006 /* 1007 * This event is reported when eraser tip touches the surface. 1008 * Actual eraser (BTN_TOOL_RUBBER) is set and released either 1009 * by Invert if tool reports proximity or by Eraser directly. 1010 */ 1011 if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) { 1012 device->quirks |= HID_QUIRK_NOINVERT; 1013 set_bit(BTN_TOOL_RUBBER, input->keybit); 1014 } 1015 map_key_clear(BTN_TOUCH); 1016 break; 1017 1018 case 0x46: /* TabletPick */ 1019 case 0x5a: /* SecondaryBarrelSwitch */ 1020 map_key_clear(BTN_STYLUS2); 1021 break; 1022 1023 case 0x5b: /* TransducerSerialNumber */ 1024 case 0x6e: /* TransducerSerialNumber2 */ 1025 map_msc(MSC_SERIAL); 1026 break; 1027 1028 default: goto unknown; 1029 } 1030 break; 1031 1032 case HID_UP_TELEPHONY: 1033 switch (usage->hid & HID_USAGE) { 1034 case 0x2f: map_key_clear(KEY_MICMUTE); break; 1035 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 1036 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 1037 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 1038 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 1039 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 1040 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 1041 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 1042 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1043 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1044 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1045 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1046 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1047 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1048 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1049 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1050 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1051 default: goto ignore; 1052 } 1053 break; 1054 1055 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1056 switch (usage->hid & HID_USAGE) { 1057 case 0x000: goto ignore; 1058 case 0x030: map_key_clear(KEY_POWER); break; 1059 case 0x031: map_key_clear(KEY_RESTART); break; 1060 case 0x032: map_key_clear(KEY_SLEEP); break; 1061 case 0x034: map_key_clear(KEY_SLEEP); break; 1062 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1063 case 0x036: map_key_clear(BTN_MISC); break; 1064 1065 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1066 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1067 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1068 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1069 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1070 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1071 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1072 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1073 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1074 1075 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1076 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1077 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1078 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1079 case 0x069: map_key_clear(KEY_RED); break; 1080 case 0x06a: map_key_clear(KEY_GREEN); break; 1081 case 0x06b: map_key_clear(KEY_BLUE); break; 1082 case 0x06c: map_key_clear(KEY_YELLOW); break; 1083 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1084 1085 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1086 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1087 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1088 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1089 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1090 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1091 1092 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1093 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1094 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1095 1096 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1097 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1098 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1099 1100 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1101 case 0x083: map_key_clear(KEY_LAST); break; 1102 case 0x084: map_key_clear(KEY_ENTER); break; 1103 case 0x088: map_key_clear(KEY_PC); break; 1104 case 0x089: map_key_clear(KEY_TV); break; 1105 case 0x08a: map_key_clear(KEY_WWW); break; 1106 case 0x08b: map_key_clear(KEY_DVD); break; 1107 case 0x08c: map_key_clear(KEY_PHONE); break; 1108 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1109 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1110 case 0x08f: map_key_clear(KEY_GAMES); break; 1111 case 0x090: map_key_clear(KEY_MEMO); break; 1112 case 0x091: map_key_clear(KEY_CD); break; 1113 case 0x092: map_key_clear(KEY_VCR); break; 1114 case 0x093: map_key_clear(KEY_TUNER); break; 1115 case 0x094: map_key_clear(KEY_EXIT); break; 1116 case 0x095: map_key_clear(KEY_HELP); break; 1117 case 0x096: map_key_clear(KEY_TAPE); break; 1118 case 0x097: map_key_clear(KEY_TV2); break; 1119 case 0x098: map_key_clear(KEY_SAT); break; 1120 case 0x09a: map_key_clear(KEY_PVR); break; 1121 1122 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1123 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1124 case 0x0a0: map_key_clear(KEY_VCR2); break; 1125 1126 case 0x0b0: map_key_clear(KEY_PLAY); break; 1127 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1128 case 0x0b2: map_key_clear(KEY_RECORD); break; 1129 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1130 case 0x0b4: map_key_clear(KEY_REWIND); break; 1131 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1132 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1133 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1134 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1135 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1136 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1137 case 0x0bf: map_key_clear(KEY_SLOW); break; 1138 1139 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1140 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1141 1142 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1143 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1144 1145 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1146 case 0x0e2: map_key_clear(KEY_MUTE); break; 1147 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1148 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1149 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1150 case 0x0f5: map_key_clear(KEY_SLOW); break; 1151 1152 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1153 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1154 case 0x183: map_key_clear(KEY_CONFIG); break; 1155 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1156 case 0x185: map_key_clear(KEY_EDITOR); break; 1157 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1158 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1159 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1160 case 0x189: map_key_clear(KEY_DATABASE); break; 1161 case 0x18a: map_key_clear(KEY_MAIL); break; 1162 case 0x18b: map_key_clear(KEY_NEWS); break; 1163 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1164 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1165 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1166 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1167 case 0x190: map_key_clear(KEY_JOURNAL); break; 1168 case 0x191: map_key_clear(KEY_FINANCE); break; 1169 case 0x192: map_key_clear(KEY_CALC); break; 1170 case 0x193: map_key_clear(KEY_PLAYER); break; 1171 case 0x194: map_key_clear(KEY_FILE); break; 1172 case 0x196: map_key_clear(KEY_WWW); break; 1173 case 0x199: map_key_clear(KEY_CHAT); break; 1174 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1175 case 0x19e: map_key_clear(KEY_COFFEE); break; 1176 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1177 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1178 case 0x1a3: map_key_clear(KEY_NEXT); break; 1179 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1180 case 0x1a6: map_key_clear(KEY_HELP); break; 1181 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1182 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1183 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1184 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1185 case 0x1b4: map_key_clear(KEY_FILE); break; 1186 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1187 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1188 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1189 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1190 case 0x1bd: map_key_clear(KEY_INFO); break; 1191 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1192 case 0x201: map_key_clear(KEY_NEW); break; 1193 case 0x202: map_key_clear(KEY_OPEN); break; 1194 case 0x203: map_key_clear(KEY_CLOSE); break; 1195 case 0x204: map_key_clear(KEY_EXIT); break; 1196 case 0x207: map_key_clear(KEY_SAVE); break; 1197 case 0x208: map_key_clear(KEY_PRINT); break; 1198 case 0x209: map_key_clear(KEY_PROPS); break; 1199 case 0x21a: map_key_clear(KEY_UNDO); break; 1200 case 0x21b: map_key_clear(KEY_COPY); break; 1201 case 0x21c: map_key_clear(KEY_CUT); break; 1202 case 0x21d: map_key_clear(KEY_PASTE); break; 1203 case 0x21f: map_key_clear(KEY_FIND); break; 1204 case 0x221: map_key_clear(KEY_SEARCH); break; 1205 case 0x222: map_key_clear(KEY_GOTO); break; 1206 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1207 case 0x224: map_key_clear(KEY_BACK); break; 1208 case 0x225: map_key_clear(KEY_FORWARD); break; 1209 case 0x226: map_key_clear(KEY_STOP); break; 1210 case 0x227: map_key_clear(KEY_REFRESH); break; 1211 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1212 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1213 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1214 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1215 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1216 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1217 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1218 case 0x238: /* AC Pan */ 1219 set_bit(REL_HWHEEL, input->relbit); 1220 map_rel(REL_HWHEEL_HI_RES); 1221 break; 1222 case 0x23d: map_key_clear(KEY_EDIT); break; 1223 case 0x25f: map_key_clear(KEY_CANCEL); break; 1224 case 0x269: map_key_clear(KEY_INSERT); break; 1225 case 0x26a: map_key_clear(KEY_DELETE); break; 1226 case 0x279: map_key_clear(KEY_REDO); break; 1227 1228 case 0x289: map_key_clear(KEY_REPLY); break; 1229 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1230 case 0x28c: map_key_clear(KEY_SEND); break; 1231 1232 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1233 1234 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1235 1236 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1237 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1238 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1239 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1240 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1241 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1242 1243 case 0x29f: map_key_clear(KEY_SCALE); break; 1244 1245 default: map_key_clear(KEY_UNKNOWN); 1246 } 1247 break; 1248 1249 case HID_UP_GENDEVCTRLS: 1250 switch (usage->hid) { 1251 case HID_DC_BATTERYSTRENGTH: 1252 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1253 usage->type = EV_PWR; 1254 return; 1255 } 1256 goto unknown; 1257 1258 case HID_UP_BATTERY: 1259 switch (usage->hid) { 1260 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1261 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1262 usage->type = EV_PWR; 1263 return; 1264 case HID_BAT_CHARGING: 1265 usage->type = EV_PWR; 1266 return; 1267 } 1268 goto unknown; 1269 case HID_UP_CAMERA: 1270 switch (usage->hid & HID_USAGE) { 1271 case 0x020: 1272 map_key_clear(KEY_CAMERA_FOCUS); break; 1273 case 0x021: 1274 map_key_clear(KEY_CAMERA); break; 1275 default: 1276 goto ignore; 1277 } 1278 break; 1279 1280 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1281 set_bit(EV_REP, input->evbit); 1282 switch (usage->hid & HID_USAGE) { 1283 case 0x021: map_key_clear(KEY_PRINT); break; 1284 case 0x070: map_key_clear(KEY_HP); break; 1285 case 0x071: map_key_clear(KEY_CAMERA); break; 1286 case 0x072: map_key_clear(KEY_SOUND); break; 1287 case 0x073: map_key_clear(KEY_QUESTION); break; 1288 case 0x080: map_key_clear(KEY_EMAIL); break; 1289 case 0x081: map_key_clear(KEY_CHAT); break; 1290 case 0x082: map_key_clear(KEY_SEARCH); break; 1291 case 0x083: map_key_clear(KEY_CONNECT); break; 1292 case 0x084: map_key_clear(KEY_FINANCE); break; 1293 case 0x085: map_key_clear(KEY_SPORT); break; 1294 case 0x086: map_key_clear(KEY_SHOP); break; 1295 default: goto ignore; 1296 } 1297 break; 1298 1299 case HID_UP_HPVENDOR2: 1300 set_bit(EV_REP, input->evbit); 1301 switch (usage->hid & HID_USAGE) { 1302 case 0x001: map_key_clear(KEY_MICMUTE); break; 1303 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1304 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1305 default: goto ignore; 1306 } 1307 break; 1308 1309 case HID_UP_MSVENDOR: 1310 goto ignore; 1311 1312 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1313 set_bit(EV_REP, input->evbit); 1314 goto ignore; 1315 1316 case HID_UP_LOGIVENDOR: 1317 /* intentional fallback */ 1318 case HID_UP_LOGIVENDOR2: 1319 /* intentional fallback */ 1320 case HID_UP_LOGIVENDOR3: 1321 goto ignore; 1322 1323 case HID_UP_PID: 1324 switch (usage->hid & HID_USAGE) { 1325 case 0xa4: map_key_clear(BTN_DEAD); break; 1326 default: goto ignore; 1327 } 1328 break; 1329 1330 default: 1331 unknown: 1332 if (field->report_size == 1) { 1333 if (field->report->type == HID_OUTPUT_REPORT) { 1334 map_led(LED_MISC); 1335 break; 1336 } 1337 map_key(BTN_MISC); 1338 break; 1339 } 1340 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1341 map_rel(REL_MISC); 1342 break; 1343 } 1344 map_abs(ABS_MISC); 1345 break; 1346 } 1347 1348 mapped: 1349 /* Mapping failed, bail out */ 1350 if (!bit) 1351 return; 1352 1353 if (device->driver->input_mapped && 1354 device->driver->input_mapped(device, hidinput, field, usage, 1355 &bit, &max) < 0) { 1356 /* 1357 * The driver indicated that no further generic handling 1358 * of the usage is desired. 1359 */ 1360 return; 1361 } 1362 1363 set_bit(usage->type, input->evbit); 1364 1365 /* 1366 * This part is *really* controversial: 1367 * - HID aims at being generic so we should do our best to export 1368 * all incoming events 1369 * - HID describes what events are, so there is no reason for ABS_X 1370 * to be mapped to ABS_Y 1371 * - HID is using *_MISC+N as a default value, but nothing prevents 1372 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1373 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1374 * processing) 1375 * 1376 * If devices still want to use this (at their own risk), they will 1377 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1378 * the default should be a reliable mapping. 1379 */ 1380 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1381 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1382 usage->code = find_next_zero_bit(bit, 1383 max + 1, 1384 usage->code); 1385 } else { 1386 device->status |= HID_STAT_DUP_DETECTED; 1387 goto ignore; 1388 } 1389 } 1390 1391 if (usage->code > max) 1392 goto ignore; 1393 1394 if (usage->type == EV_ABS) { 1395 1396 int a = field->logical_minimum; 1397 int b = field->logical_maximum; 1398 1399 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1400 a = field->logical_minimum = 0; 1401 b = field->logical_maximum = 255; 1402 } 1403 1404 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1405 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1406 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1407 1408 input_abs_set_res(input, usage->code, 1409 hidinput_calc_abs_res(field, usage->code)); 1410 1411 /* use a larger default input buffer for MT devices */ 1412 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1413 input_set_events_per_packet(input, 60); 1414 } 1415 1416 if (usage->type == EV_ABS && 1417 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1418 int i; 1419 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1420 input_set_abs_params(input, i, -1, 1, 0, 0); 1421 set_bit(i, input->absbit); 1422 } 1423 if (usage->hat_dir && !field->dpad) 1424 field->dpad = usage->code; 1425 } 1426 1427 /* for those devices which produce Consumer volume usage as relative, 1428 * we emulate pressing volumeup/volumedown appropriate number of times 1429 * in hidinput_hid_event() 1430 */ 1431 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1432 (usage->code == ABS_VOLUME)) { 1433 set_bit(KEY_VOLUMEUP, input->keybit); 1434 set_bit(KEY_VOLUMEDOWN, input->keybit); 1435 } 1436 1437 if (usage->type == EV_KEY) { 1438 set_bit(EV_MSC, input->evbit); 1439 set_bit(MSC_SCAN, input->mscbit); 1440 } 1441 1442 return; 1443 1444 ignore: 1445 usage->type = 0; 1446 usage->code = 0; 1447 } 1448 1449 static void hidinput_handle_scroll(struct hid_usage *usage, 1450 struct input_dev *input, 1451 __s32 value) 1452 { 1453 int code; 1454 int hi_res, lo_res; 1455 1456 if (value == 0) 1457 return; 1458 1459 if (usage->code == REL_WHEEL_HI_RES) 1460 code = REL_WHEEL; 1461 else 1462 code = REL_HWHEEL; 1463 1464 /* 1465 * Windows reports one wheel click as value 120. Where a high-res 1466 * scroll wheel is present, a fraction of 120 is reported instead. 1467 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1468 * adhere to the 120 expectation. 1469 */ 1470 hi_res = value * 120/usage->resolution_multiplier; 1471 1472 usage->wheel_accumulated += hi_res; 1473 lo_res = usage->wheel_accumulated/120; 1474 if (lo_res) 1475 usage->wheel_accumulated -= lo_res * 120; 1476 1477 input_event(input, EV_REL, code, lo_res); 1478 input_event(input, EV_REL, usage->code, hi_res); 1479 } 1480 1481 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1482 unsigned int tool) 1483 { 1484 /* if the given tool is not currently reported, ignore */ 1485 if (!test_bit(tool, input->key)) 1486 return; 1487 1488 /* 1489 * if the given tool was previously set, release it, 1490 * release any TOUCH and send an EV_SYN 1491 */ 1492 input_event(input, EV_KEY, BTN_TOUCH, 0); 1493 input_event(input, EV_KEY, tool, 0); 1494 input_event(input, EV_SYN, SYN_REPORT, 0); 1495 1496 report->tool = 0; 1497 } 1498 1499 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1500 unsigned int new_tool) 1501 { 1502 if (report->tool != new_tool) 1503 hid_report_release_tool(report, input, report->tool); 1504 1505 input_event(input, EV_KEY, new_tool, 1); 1506 report->tool = new_tool; 1507 } 1508 1509 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1510 { 1511 struct input_dev *input; 1512 struct hid_report *report = field->report; 1513 unsigned *quirks = &hid->quirks; 1514 1515 if (!usage->type) 1516 return; 1517 1518 if (usage->type == EV_PWR) { 1519 hidinput_update_battery(hid, usage->hid, value); 1520 return; 1521 } 1522 1523 if (!field->hidinput) 1524 return; 1525 1526 input = field->hidinput->input; 1527 1528 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1529 int hat_dir = usage->hat_dir; 1530 if (!hat_dir) 1531 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1532 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1533 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1534 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1535 return; 1536 } 1537 1538 /* 1539 * Ignore out-of-range values as per HID specification, 1540 * section 5.10 and 6.2.25, when NULL state bit is present. 1541 * When it's not, clamp the value to match Microsoft's input 1542 * driver as mentioned in "Required HID usages for digitizers": 1543 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1544 * 1545 * The logical_minimum < logical_maximum check is done so that we 1546 * don't unintentionally discard values sent by devices which 1547 * don't specify logical min and max. 1548 */ 1549 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1550 field->logical_minimum < field->logical_maximum) { 1551 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1552 (value < field->logical_minimum || 1553 value > field->logical_maximum)) { 1554 dbg_hid("Ignoring out-of-range value %x\n", value); 1555 return; 1556 } 1557 value = clamp(value, 1558 field->logical_minimum, 1559 field->logical_maximum); 1560 } 1561 1562 switch (usage->hid) { 1563 case HID_DG_ERASER: 1564 report->tool_active |= !!value; 1565 1566 /* 1567 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1568 * to accommodate for devices not following the spec. 1569 */ 1570 if (value) 1571 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1572 else if (report->tool != BTN_TOOL_RUBBER) 1573 /* value is off, tool is not rubber, ignore */ 1574 return; 1575 else if (*quirks & HID_QUIRK_NOINVERT && 1576 !test_bit(BTN_TOUCH, input->key)) { 1577 /* 1578 * There is no invert to release the tool, let hid_input 1579 * send BTN_TOUCH with scancode and release the tool after. 1580 */ 1581 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1582 return; 1583 } 1584 1585 /* let hid-input set BTN_TOUCH */ 1586 break; 1587 1588 case HID_DG_INVERT: 1589 report->tool_active |= !!value; 1590 1591 /* 1592 * If invert is set, we store BTN_TOOL_RUBBER. 1593 */ 1594 if (value) 1595 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1596 else if (!report->tool_active) 1597 /* tool_active not set means Invert and Eraser are not set */ 1598 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1599 1600 /* no further processing */ 1601 return; 1602 1603 case HID_DG_INRANGE: 1604 report->tool_active |= !!value; 1605 1606 if (report->tool_active) { 1607 /* 1608 * if tool is not set but is marked as active, 1609 * assume ours 1610 */ 1611 if (!report->tool) 1612 report->tool = usage->code; 1613 1614 /* drivers may have changed the value behind our back, resend it */ 1615 hid_report_set_tool(report, input, report->tool); 1616 } else { 1617 hid_report_release_tool(report, input, usage->code); 1618 } 1619 1620 /* reset tool_active for the next event */ 1621 report->tool_active = false; 1622 1623 /* no further processing */ 1624 return; 1625 1626 case HID_DG_TIPSWITCH: 1627 report->tool_active |= !!value; 1628 1629 /* if tool is set to RUBBER we should ignore the current value */ 1630 if (report->tool == BTN_TOOL_RUBBER) 1631 return; 1632 1633 break; 1634 1635 case HID_DG_TIPPRESSURE: 1636 if (*quirks & HID_QUIRK_NOTOUCH) { 1637 int a = field->logical_minimum; 1638 int b = field->logical_maximum; 1639 1640 if (value > a + ((b - a) >> 3)) { 1641 input_event(input, EV_KEY, BTN_TOUCH, 1); 1642 report->tool_active = true; 1643 } 1644 } 1645 break; 1646 1647 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1648 dbg_hid("Maximum Effects - %d\n",value); 1649 return; 1650 1651 case HID_UP_PID | 0x7fUL: 1652 dbg_hid("PID Pool Report\n"); 1653 return; 1654 } 1655 1656 switch (usage->type) { 1657 case EV_KEY: 1658 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1659 return; 1660 break; 1661 1662 case EV_REL: 1663 if (usage->code == REL_WHEEL_HI_RES || 1664 usage->code == REL_HWHEEL_HI_RES) { 1665 hidinput_handle_scroll(usage, input, value); 1666 return; 1667 } 1668 break; 1669 1670 case EV_ABS: 1671 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1672 usage->code == ABS_VOLUME) { 1673 int count = abs(value); 1674 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1675 int i; 1676 1677 for (i = 0; i < count; i++) { 1678 input_event(input, EV_KEY, direction, 1); 1679 input_sync(input); 1680 input_event(input, EV_KEY, direction, 0); 1681 input_sync(input); 1682 } 1683 return; 1684 1685 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1686 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1687 value = field->logical_maximum - value; 1688 break; 1689 } 1690 1691 /* 1692 * Ignore reports for absolute data if the data didn't change. This is 1693 * not only an optimization but also fixes 'dead' key reports. Some 1694 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1695 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1696 * can only have one of them physically available. The 'dead' keys 1697 * report constant 0. As all map to the same keycode, they'd confuse 1698 * the input layer. If we filter the 'dead' keys on the HID level, we 1699 * skip the keycode translation and only forward real events. 1700 */ 1701 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1702 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1703 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1704 usage->usage_index < field->maxusage && 1705 value == field->value[usage->usage_index]) 1706 return; 1707 1708 /* report the usage code as scancode if the key status has changed */ 1709 if (usage->type == EV_KEY && 1710 (!test_bit(usage->code, input->key)) == value) 1711 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1712 1713 input_event(input, usage->type, usage->code, value); 1714 1715 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1716 usage->type == EV_KEY && value) { 1717 input_sync(input); 1718 input_event(input, usage->type, usage->code, 0); 1719 } 1720 } 1721 1722 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1723 { 1724 struct hid_input *hidinput; 1725 1726 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1727 return; 1728 1729 list_for_each_entry(hidinput, &hid->inputs, list) 1730 input_sync(hidinput->input); 1731 } 1732 EXPORT_SYMBOL_GPL(hidinput_report_event); 1733 1734 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1735 unsigned int code, struct hid_field **field) 1736 { 1737 struct hid_report *report; 1738 int i, j; 1739 1740 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1741 for (i = 0; i < report->maxfield; i++) { 1742 *field = report->field[i]; 1743 for (j = 0; j < (*field)->maxusage; j++) 1744 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1745 return j; 1746 } 1747 } 1748 return -1; 1749 } 1750 1751 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1752 { 1753 struct hid_report *report; 1754 struct hid_field *field; 1755 int i, j; 1756 1757 list_for_each_entry(report, 1758 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1759 list) { 1760 for (i = 0; i < report->maxfield; i++) { 1761 field = report->field[i]; 1762 for (j = 0; j < field->maxusage; j++) 1763 if (field->usage[j].type == EV_LED) 1764 return field; 1765 } 1766 } 1767 return NULL; 1768 } 1769 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1770 1771 unsigned int hidinput_count_leds(struct hid_device *hid) 1772 { 1773 struct hid_report *report; 1774 struct hid_field *field; 1775 int i, j; 1776 unsigned int count = 0; 1777 1778 list_for_each_entry(report, 1779 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1780 list) { 1781 for (i = 0; i < report->maxfield; i++) { 1782 field = report->field[i]; 1783 for (j = 0; j < field->maxusage; j++) 1784 if (field->usage[j].type == EV_LED && 1785 field->value[j]) 1786 count += 1; 1787 } 1788 } 1789 return count; 1790 } 1791 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1792 1793 static void hidinput_led_worker(struct work_struct *work) 1794 { 1795 struct hid_device *hid = container_of(work, struct hid_device, 1796 led_work); 1797 struct hid_field *field; 1798 struct hid_report *report; 1799 int ret; 1800 u32 len; 1801 __u8 *buf; 1802 1803 field = hidinput_get_led_field(hid); 1804 if (!field) 1805 return; 1806 1807 /* 1808 * field->report is accessed unlocked regarding HID core. So there might 1809 * be another incoming SET-LED request from user-space, which changes 1810 * the LED state while we assemble our outgoing buffer. However, this 1811 * doesn't matter as hid_output_report() correctly converts it into a 1812 * boolean value no matter what information is currently set on the LED 1813 * field (even garbage). So the remote device will always get a valid 1814 * request. 1815 * And in case we send a wrong value, a next led worker is spawned 1816 * for every SET-LED request so the following worker will send the 1817 * correct value, guaranteed! 1818 */ 1819 1820 report = field->report; 1821 1822 /* use custom SET_REPORT request if possible (asynchronous) */ 1823 if (hid->ll_driver->request) 1824 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1825 1826 /* fall back to generic raw-output-report */ 1827 len = hid_report_len(report); 1828 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1829 if (!buf) 1830 return; 1831 1832 hid_output_report(report, buf); 1833 /* synchronous output report */ 1834 ret = hid_hw_output_report(hid, buf, len); 1835 if (ret == -ENOSYS) 1836 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1837 HID_REQ_SET_REPORT); 1838 kfree(buf); 1839 } 1840 1841 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1842 unsigned int code, int value) 1843 { 1844 struct hid_device *hid = input_get_drvdata(dev); 1845 struct hid_field *field; 1846 int offset; 1847 1848 if (type == EV_FF) 1849 return input_ff_event(dev, type, code, value); 1850 1851 if (type != EV_LED) 1852 return -1; 1853 1854 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1855 hid_warn(dev, "event field not found\n"); 1856 return -1; 1857 } 1858 1859 hid_set_field(field, offset, value); 1860 1861 schedule_work(&hid->led_work); 1862 return 0; 1863 } 1864 1865 static int hidinput_open(struct input_dev *dev) 1866 { 1867 struct hid_device *hid = input_get_drvdata(dev); 1868 1869 return hid_hw_open(hid); 1870 } 1871 1872 static void hidinput_close(struct input_dev *dev) 1873 { 1874 struct hid_device *hid = input_get_drvdata(dev); 1875 1876 hid_hw_close(hid); 1877 } 1878 1879 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1880 struct hid_report *report, bool use_logical_max) 1881 { 1882 struct hid_usage *usage; 1883 bool update_needed = false; 1884 bool get_report_completed = false; 1885 int i, j; 1886 1887 if (report->maxfield == 0) 1888 return false; 1889 1890 for (i = 0; i < report->maxfield; i++) { 1891 __s32 value = use_logical_max ? 1892 report->field[i]->logical_maximum : 1893 report->field[i]->logical_minimum; 1894 1895 /* There is no good reason for a Resolution 1896 * Multiplier to have a count other than 1. 1897 * Ignore that case. 1898 */ 1899 if (report->field[i]->report_count != 1) 1900 continue; 1901 1902 for (j = 0; j < report->field[i]->maxusage; j++) { 1903 usage = &report->field[i]->usage[j]; 1904 1905 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1906 continue; 1907 1908 /* 1909 * If we have more than one feature within this 1910 * report we need to fill in the bits from the 1911 * others before we can overwrite the ones for the 1912 * Resolution Multiplier. 1913 * 1914 * But if we're not allowed to read from the device, 1915 * we just bail. Such a device should not exist 1916 * anyway. 1917 */ 1918 if (!get_report_completed && report->maxfield > 1) { 1919 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1920 return update_needed; 1921 1922 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1923 hid_hw_wait(hid); 1924 get_report_completed = true; 1925 } 1926 1927 report->field[i]->value[j] = value; 1928 update_needed = true; 1929 } 1930 } 1931 1932 return update_needed; 1933 } 1934 1935 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1936 { 1937 struct hid_report_enum *rep_enum; 1938 struct hid_report *rep; 1939 int ret; 1940 1941 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1942 list_for_each_entry(rep, &rep_enum->report_list, list) { 1943 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1944 rep, true); 1945 1946 if (update_needed) { 1947 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1948 if (ret) { 1949 __hidinput_change_resolution_multipliers(hid, 1950 rep, false); 1951 return; 1952 } 1953 } 1954 } 1955 1956 /* refresh our structs */ 1957 hid_setup_resolution_multiplier(hid); 1958 } 1959 1960 static void report_features(struct hid_device *hid) 1961 { 1962 struct hid_driver *drv = hid->driver; 1963 struct hid_report_enum *rep_enum; 1964 struct hid_report *rep; 1965 struct hid_usage *usage; 1966 int i, j; 1967 1968 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1969 list_for_each_entry(rep, &rep_enum->report_list, list) 1970 for (i = 0; i < rep->maxfield; i++) { 1971 /* Ignore if report count is out of bounds. */ 1972 if (rep->field[i]->report_count < 1) 1973 continue; 1974 1975 for (j = 0; j < rep->field[i]->maxusage; j++) { 1976 usage = &rep->field[i]->usage[j]; 1977 1978 /* Verify if Battery Strength feature is available */ 1979 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1980 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1981 rep->field[i], false); 1982 1983 if (drv->feature_mapping) 1984 drv->feature_mapping(hid, rep->field[i], usage); 1985 } 1986 } 1987 } 1988 1989 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1990 unsigned int application) 1991 { 1992 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1993 struct input_dev *input_dev = input_allocate_device(); 1994 const char *suffix = NULL; 1995 size_t suffix_len, name_len; 1996 1997 if (!hidinput || !input_dev) 1998 goto fail; 1999 2000 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 2001 hid->maxapplication > 1) { 2002 switch (application) { 2003 case HID_GD_KEYBOARD: 2004 suffix = "Keyboard"; 2005 break; 2006 case HID_GD_KEYPAD: 2007 suffix = "Keypad"; 2008 break; 2009 case HID_GD_MOUSE: 2010 suffix = "Mouse"; 2011 break; 2012 case HID_DG_PEN: 2013 /* 2014 * yes, there is an issue here: 2015 * DG_PEN -> "Stylus" 2016 * DG_STYLUS -> "Pen" 2017 * But changing this now means users with config snippets 2018 * will have to change it and the test suite will not be happy. 2019 */ 2020 suffix = "Stylus"; 2021 break; 2022 case HID_DG_STYLUS: 2023 suffix = "Pen"; 2024 break; 2025 case HID_DG_TOUCHSCREEN: 2026 suffix = "Touchscreen"; 2027 break; 2028 case HID_DG_TOUCHPAD: 2029 suffix = "Touchpad"; 2030 break; 2031 case HID_GD_SYSTEM_CONTROL: 2032 suffix = "System Control"; 2033 break; 2034 case HID_CP_CONSUMER_CONTROL: 2035 suffix = "Consumer Control"; 2036 break; 2037 case HID_GD_WIRELESS_RADIO_CTLS: 2038 suffix = "Wireless Radio Control"; 2039 break; 2040 case HID_GD_SYSTEM_MULTIAXIS: 2041 suffix = "System Multi Axis"; 2042 break; 2043 default: 2044 break; 2045 } 2046 } 2047 2048 if (suffix) { 2049 name_len = strlen(hid->name); 2050 suffix_len = strlen(suffix); 2051 if ((name_len < suffix_len) || 2052 strcmp(hid->name + name_len - suffix_len, suffix)) { 2053 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 2054 hid->name, suffix); 2055 if (!hidinput->name) 2056 goto fail; 2057 } 2058 } 2059 2060 input_set_drvdata(input_dev, hid); 2061 input_dev->event = hidinput_input_event; 2062 input_dev->open = hidinput_open; 2063 input_dev->close = hidinput_close; 2064 input_dev->setkeycode = hidinput_setkeycode; 2065 input_dev->getkeycode = hidinput_getkeycode; 2066 2067 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2068 input_dev->phys = hid->phys; 2069 input_dev->uniq = hid->uniq; 2070 input_dev->id.bustype = hid->bus; 2071 input_dev->id.vendor = hid->vendor; 2072 input_dev->id.product = hid->product; 2073 input_dev->id.version = hid->version; 2074 input_dev->dev.parent = &hid->dev; 2075 2076 hidinput->input = input_dev; 2077 hidinput->application = application; 2078 list_add_tail(&hidinput->list, &hid->inputs); 2079 2080 INIT_LIST_HEAD(&hidinput->reports); 2081 2082 return hidinput; 2083 2084 fail: 2085 kfree(hidinput); 2086 input_free_device(input_dev); 2087 hid_err(hid, "Out of memory during hid input probe\n"); 2088 return NULL; 2089 } 2090 2091 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2092 { 2093 int i; 2094 unsigned long r = 0; 2095 2096 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2097 r |= hidinput->input->evbit[i]; 2098 2099 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2100 r |= hidinput->input->keybit[i]; 2101 2102 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2103 r |= hidinput->input->relbit[i]; 2104 2105 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2106 r |= hidinput->input->absbit[i]; 2107 2108 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2109 r |= hidinput->input->mscbit[i]; 2110 2111 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2112 r |= hidinput->input->ledbit[i]; 2113 2114 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2115 r |= hidinput->input->sndbit[i]; 2116 2117 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2118 r |= hidinput->input->ffbit[i]; 2119 2120 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2121 r |= hidinput->input->swbit[i]; 2122 2123 return !!r; 2124 } 2125 2126 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2127 struct hid_input *hidinput) 2128 { 2129 struct hid_report *report; 2130 int i, k; 2131 2132 list_del(&hidinput->list); 2133 input_free_device(hidinput->input); 2134 kfree(hidinput->name); 2135 2136 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2137 if (k == HID_OUTPUT_REPORT && 2138 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2139 continue; 2140 2141 list_for_each_entry(report, &hid->report_enum[k].report_list, 2142 list) { 2143 2144 for (i = 0; i < report->maxfield; i++) 2145 if (report->field[i]->hidinput == hidinput) 2146 report->field[i]->hidinput = NULL; 2147 } 2148 } 2149 2150 kfree(hidinput); 2151 } 2152 2153 static struct hid_input *hidinput_match(struct hid_report *report) 2154 { 2155 struct hid_device *hid = report->device; 2156 struct hid_input *hidinput; 2157 2158 list_for_each_entry(hidinput, &hid->inputs, list) { 2159 if (hidinput->report && 2160 hidinput->report->id == report->id) 2161 return hidinput; 2162 } 2163 2164 return NULL; 2165 } 2166 2167 static struct hid_input *hidinput_match_application(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->application == report->application) 2174 return hidinput; 2175 2176 /* 2177 * Keep SystemControl and ConsumerControl applications together 2178 * with the main keyboard, if present. 2179 */ 2180 if ((report->application == HID_GD_SYSTEM_CONTROL || 2181 report->application == HID_CP_CONSUMER_CONTROL) && 2182 hidinput->application == HID_GD_KEYBOARD) { 2183 return hidinput; 2184 } 2185 } 2186 2187 return NULL; 2188 } 2189 2190 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2191 struct hid_report *report) 2192 { 2193 int i, j, k; 2194 int first_field_index = 0; 2195 int slot_collection_index = -1; 2196 int prev_collection_index = -1; 2197 unsigned int slot_idx = 0; 2198 struct hid_field *field; 2199 2200 /* 2201 * First tag all the fields that are part of a slot, 2202 * a slot needs to have one Contact ID in the collection 2203 */ 2204 for (i = 0; i < report->maxfield; i++) { 2205 field = report->field[i]; 2206 2207 /* ignore fields without usage */ 2208 if (field->maxusage < 1) 2209 continue; 2210 2211 /* 2212 * janitoring when collection_index changes 2213 */ 2214 if (prev_collection_index != field->usage->collection_index) { 2215 prev_collection_index = field->usage->collection_index; 2216 first_field_index = i; 2217 } 2218 2219 /* 2220 * if we already found a Contact ID in the collection, 2221 * tag and continue to the next. 2222 */ 2223 if (slot_collection_index == field->usage->collection_index) { 2224 field->slot_idx = slot_idx; 2225 continue; 2226 } 2227 2228 /* check if the current field has Contact ID */ 2229 for (j = 0; j < field->maxusage; j++) { 2230 if (field->usage[j].hid == HID_DG_CONTACTID) { 2231 slot_collection_index = field->usage->collection_index; 2232 slot_idx++; 2233 2234 /* 2235 * mark all previous fields and this one in the 2236 * current collection to be slotted. 2237 */ 2238 for (k = first_field_index; k <= i; k++) 2239 report->field[k]->slot_idx = slot_idx; 2240 break; 2241 } 2242 } 2243 } 2244 2245 for (i = 0; i < report->maxfield; i++) 2246 for (j = 0; j < report->field[i]->maxusage; j++) 2247 hidinput_configure_usage(hidinput, report->field[i], 2248 report->field[i]->usage + j, 2249 j); 2250 } 2251 2252 /* 2253 * Register the input device; print a message. 2254 * Configure the input layer interface 2255 * Read all reports and initialize the absolute field values. 2256 */ 2257 2258 int hidinput_connect(struct hid_device *hid, unsigned int force) 2259 { 2260 struct hid_driver *drv = hid->driver; 2261 struct hid_report *report; 2262 struct hid_input *next, *hidinput = NULL; 2263 unsigned int application; 2264 int i, k; 2265 2266 INIT_LIST_HEAD(&hid->inputs); 2267 INIT_WORK(&hid->led_work, hidinput_led_worker); 2268 2269 hid->status &= ~HID_STAT_DUP_DETECTED; 2270 2271 if (!force) { 2272 for (i = 0; i < hid->maxcollection; i++) { 2273 struct hid_collection *col = &hid->collection[i]; 2274 if (col->type == HID_COLLECTION_APPLICATION || 2275 col->type == HID_COLLECTION_PHYSICAL) 2276 if (IS_INPUT_APPLICATION(col->usage)) 2277 break; 2278 } 2279 2280 if (i == hid->maxcollection) 2281 return -1; 2282 } 2283 2284 report_features(hid); 2285 2286 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2287 if (k == HID_OUTPUT_REPORT && 2288 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2289 continue; 2290 2291 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2292 2293 if (!report->maxfield) 2294 continue; 2295 2296 application = report->application; 2297 2298 /* 2299 * Find the previous hidinput report attached 2300 * to this report id. 2301 */ 2302 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2303 hidinput = hidinput_match(report); 2304 else if (hid->maxapplication > 1 && 2305 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2306 hidinput = hidinput_match_application(report); 2307 2308 if (!hidinput) { 2309 hidinput = hidinput_allocate(hid, application); 2310 if (!hidinput) 2311 goto out_unwind; 2312 } 2313 2314 hidinput_configure_usages(hidinput, report); 2315 2316 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2317 hidinput->report = report; 2318 2319 list_add_tail(&report->hidinput_list, 2320 &hidinput->reports); 2321 } 2322 } 2323 2324 hidinput_change_resolution_multipliers(hid); 2325 2326 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2327 if (drv->input_configured && 2328 drv->input_configured(hid, hidinput)) 2329 goto out_unwind; 2330 2331 if (!hidinput_has_been_populated(hidinput)) { 2332 /* no need to register an input device not populated */ 2333 hidinput_cleanup_hidinput(hid, hidinput); 2334 continue; 2335 } 2336 2337 if (input_register_device(hidinput->input)) 2338 goto out_unwind; 2339 hidinput->registered = true; 2340 } 2341 2342 if (list_empty(&hid->inputs)) { 2343 hid_dbg(hid, "No inputs registered, leaving\n"); 2344 goto out_unwind; 2345 } 2346 2347 if (hid->status & HID_STAT_DUP_DETECTED) 2348 hid_dbg(hid, 2349 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2350 2351 return 0; 2352 2353 out_unwind: 2354 /* unwind the ones we already registered */ 2355 hidinput_disconnect(hid); 2356 2357 return -1; 2358 } 2359 EXPORT_SYMBOL_GPL(hidinput_connect); 2360 2361 void hidinput_disconnect(struct hid_device *hid) 2362 { 2363 struct hid_input *hidinput, *next; 2364 2365 hidinput_cleanup_battery(hid); 2366 2367 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2368 list_del(&hidinput->list); 2369 if (hidinput->registered) 2370 input_unregister_device(hidinput->input); 2371 else 2372 input_free_device(hidinput->input); 2373 kfree(hidinput->name); 2374 kfree(hidinput); 2375 } 2376 2377 /* led_work is spawned by input_dev callbacks, but doesn't access the 2378 * parent input_dev at all. Once all input devices are removed, we 2379 * know that led_work will never get restarted, so we can cancel it 2380 * synchronously and are safe. */ 2381 cancel_work_sync(&hid->led_work); 2382 } 2383 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2384 2385 #ifdef CONFIG_HID_KUNIT_TEST 2386 #include "hid-input-test.c" 2387 #endif 2388