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_ELECOM, 362 USB_DEVICE_ID_ELECOM_BM084), 363 HID_BATTERY_QUIRK_IGNORE }, 364 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 365 USB_DEVICE_ID_SYMBOL_SCANNER_3), 366 HID_BATTERY_QUIRK_IGNORE }, 367 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 368 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 369 HID_BATTERY_QUIRK_IGNORE }, 370 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 371 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 372 HID_BATTERY_QUIRK_IGNORE }, 373 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN), 374 HID_BATTERY_QUIRK_IGNORE }, 375 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 376 HID_BATTERY_QUIRK_IGNORE }, 377 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN), 378 HID_BATTERY_QUIRK_IGNORE }, 379 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L), 380 HID_BATTERY_QUIRK_AVOID_QUERY }, 381 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW), 382 HID_BATTERY_QUIRK_AVOID_QUERY }, 383 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW), 384 HID_BATTERY_QUIRK_AVOID_QUERY }, 385 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15), 386 HID_BATTERY_QUIRK_IGNORE }, 387 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100), 388 HID_BATTERY_QUIRK_IGNORE }, 389 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV), 390 HID_BATTERY_QUIRK_IGNORE }, 391 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15), 392 HID_BATTERY_QUIRK_IGNORE }, 393 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG), 394 HID_BATTERY_QUIRK_IGNORE }, 395 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN), 396 HID_BATTERY_QUIRK_IGNORE }, 397 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN), 398 HID_BATTERY_QUIRK_IGNORE }, 399 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN), 400 HID_BATTERY_QUIRK_IGNORE }, 401 {} 402 }; 403 404 static unsigned find_battery_quirk(struct hid_device *hdev) 405 { 406 unsigned quirks = 0; 407 const struct hid_device_id *match; 408 409 match = hid_match_id(hdev, hid_battery_quirks); 410 if (match != NULL) 411 quirks = match->driver_data; 412 413 return quirks; 414 } 415 416 static int hidinput_scale_battery_capacity(struct hid_device *dev, 417 int value) 418 { 419 if (dev->battery_min < dev->battery_max && 420 value >= dev->battery_min && value <= dev->battery_max) 421 value = ((value - dev->battery_min) * 100) / 422 (dev->battery_max - dev->battery_min); 423 424 return value; 425 } 426 427 static int hidinput_query_battery_capacity(struct hid_device *dev) 428 { 429 u8 *buf; 430 int ret; 431 432 buf = kmalloc(4, GFP_KERNEL); 433 if (!buf) 434 return -ENOMEM; 435 436 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 437 dev->battery_report_type, HID_REQ_GET_REPORT); 438 if (ret < 2) { 439 kfree(buf); 440 return -ENODATA; 441 } 442 443 ret = hidinput_scale_battery_capacity(dev, buf[1]); 444 kfree(buf); 445 return ret; 446 } 447 448 static int hidinput_get_battery_property(struct power_supply *psy, 449 enum power_supply_property prop, 450 union power_supply_propval *val) 451 { 452 struct hid_device *dev = power_supply_get_drvdata(psy); 453 int value; 454 int ret = 0; 455 456 switch (prop) { 457 case POWER_SUPPLY_PROP_PRESENT: 458 case POWER_SUPPLY_PROP_ONLINE: 459 val->intval = 1; 460 break; 461 462 case POWER_SUPPLY_PROP_CAPACITY: 463 if (dev->battery_status != HID_BATTERY_REPORTED && 464 !dev->battery_avoid_query) { 465 value = hidinput_query_battery_capacity(dev); 466 if (value < 0) 467 return value; 468 } else { 469 value = dev->battery_capacity; 470 } 471 472 val->intval = value; 473 break; 474 475 case POWER_SUPPLY_PROP_MODEL_NAME: 476 val->strval = dev->name; 477 break; 478 479 case POWER_SUPPLY_PROP_STATUS: 480 if (dev->battery_status != HID_BATTERY_REPORTED && 481 !dev->battery_avoid_query) { 482 value = hidinput_query_battery_capacity(dev); 483 if (value < 0) 484 return value; 485 486 dev->battery_capacity = value; 487 dev->battery_status = HID_BATTERY_QUERIED; 488 } 489 490 if (dev->battery_status == HID_BATTERY_UNKNOWN) 491 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 492 else 493 val->intval = dev->battery_charge_status; 494 break; 495 496 case POWER_SUPPLY_PROP_SCOPE: 497 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 498 break; 499 500 default: 501 ret = -EINVAL; 502 break; 503 } 504 505 return ret; 506 } 507 508 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 509 struct hid_field *field, bool is_percentage) 510 { 511 struct power_supply_desc *psy_desc; 512 struct power_supply_config psy_cfg = { .drv_data = dev, }; 513 unsigned quirks; 514 s32 min, max; 515 int error; 516 517 if (dev->battery) 518 return 0; /* already initialized? */ 519 520 quirks = find_battery_quirk(dev); 521 522 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 523 dev->bus, dev->vendor, dev->product, dev->version, quirks); 524 525 if (quirks & HID_BATTERY_QUIRK_IGNORE) 526 return 0; 527 528 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 529 if (!psy_desc) 530 return -ENOMEM; 531 532 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 533 strlen(dev->uniq) ? 534 dev->uniq : dev_name(&dev->dev)); 535 if (!psy_desc->name) { 536 error = -ENOMEM; 537 goto err_free_mem; 538 } 539 540 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 541 psy_desc->properties = hidinput_battery_props; 542 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 543 psy_desc->use_for_apm = 0; 544 psy_desc->get_property = hidinput_get_battery_property; 545 546 min = field->logical_minimum; 547 max = field->logical_maximum; 548 549 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 550 min = 0; 551 max = 100; 552 } 553 554 if (quirks & HID_BATTERY_QUIRK_FEATURE) 555 report_type = HID_FEATURE_REPORT; 556 557 dev->battery_min = min; 558 dev->battery_max = max; 559 dev->battery_report_type = report_type; 560 dev->battery_report_id = field->report->id; 561 dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING; 562 563 /* 564 * Stylus is normally not connected to the device and thus we 565 * can't query the device and get meaningful battery strength. 566 * We have to wait for the device to report it on its own. 567 */ 568 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 569 field->physical == HID_DG_STYLUS; 570 571 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 572 dev->battery_avoid_query = true; 573 574 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 575 if (IS_ERR(dev->battery)) { 576 error = PTR_ERR(dev->battery); 577 hid_warn(dev, "can't register power supply: %d\n", error); 578 goto err_free_name; 579 } 580 581 power_supply_powers(dev->battery, &dev->dev); 582 return 0; 583 584 err_free_name: 585 kfree(psy_desc->name); 586 err_free_mem: 587 kfree(psy_desc); 588 dev->battery = NULL; 589 return error; 590 } 591 592 static void hidinput_cleanup_battery(struct hid_device *dev) 593 { 594 const struct power_supply_desc *psy_desc; 595 596 if (!dev->battery) 597 return; 598 599 psy_desc = dev->battery->desc; 600 power_supply_unregister(dev->battery); 601 kfree(psy_desc->name); 602 kfree(psy_desc); 603 dev->battery = NULL; 604 } 605 606 static void hidinput_update_battery(struct hid_device *dev, int value) 607 { 608 int capacity; 609 610 if (!dev->battery) 611 return; 612 613 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 614 return; 615 616 capacity = hidinput_scale_battery_capacity(dev, value); 617 618 if (dev->battery_status != HID_BATTERY_REPORTED || 619 capacity != dev->battery_capacity || 620 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 621 dev->battery_capacity = capacity; 622 dev->battery_status = HID_BATTERY_REPORTED; 623 dev->battery_ratelimit_time = 624 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 625 power_supply_changed(dev->battery); 626 } 627 } 628 629 static bool hidinput_set_battery_charge_status(struct hid_device *dev, 630 unsigned int usage, int value) 631 { 632 switch (usage) { 633 case HID_BAT_CHARGING: 634 dev->battery_charge_status = value ? 635 POWER_SUPPLY_STATUS_CHARGING : 636 POWER_SUPPLY_STATUS_DISCHARGING; 637 return true; 638 } 639 640 return false; 641 } 642 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 643 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 644 struct hid_field *field, bool is_percentage) 645 { 646 return 0; 647 } 648 649 static void hidinput_cleanup_battery(struct hid_device *dev) 650 { 651 } 652 653 static void hidinput_update_battery(struct hid_device *dev, int value) 654 { 655 } 656 657 static bool hidinput_set_battery_charge_status(struct hid_device *dev, 658 unsigned int usage, int value) 659 { 660 return false; 661 } 662 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 663 664 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 665 unsigned int type, unsigned int usage) 666 { 667 struct hid_collection *collection; 668 669 collection = &device->collection[field->usage->collection_index]; 670 671 return collection->type == type && collection->usage == usage; 672 } 673 674 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 675 struct hid_usage *usage, unsigned int usage_index) 676 { 677 struct input_dev *input = hidinput->input; 678 struct hid_device *device = input_get_drvdata(input); 679 const struct usage_priority *usage_priority = NULL; 680 int max = 0, code; 681 unsigned int i = 0; 682 unsigned long *bit = NULL; 683 684 field->hidinput = hidinput; 685 686 if (field->flags & HID_MAIN_ITEM_CONSTANT) 687 goto ignore; 688 689 /* Ignore if report count is out of bounds. */ 690 if (field->report_count < 1) 691 goto ignore; 692 693 /* only LED usages are supported in output fields */ 694 if (field->report_type == HID_OUTPUT_REPORT && 695 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 696 goto ignore; 697 } 698 699 /* assign a priority based on the static list declared here */ 700 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 701 if (usage->hid == hidinput_usages_priorities[i].usage) { 702 usage_priority = &hidinput_usages_priorities[i]; 703 704 field->usages_priorities[usage_index] = 705 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 706 break; 707 } 708 } 709 710 /* 711 * For slotted devices, we need to also add the slot index 712 * in the priority. 713 */ 714 if (usage_priority && usage_priority->global) 715 field->usages_priorities[usage_index] |= 716 usage_priority->slot_overwrite; 717 else 718 field->usages_priorities[usage_index] |= 719 (0xff - field->slot_idx) << 16; 720 721 if (device->driver->input_mapping) { 722 int ret = device->driver->input_mapping(device, hidinput, field, 723 usage, &bit, &max); 724 if (ret > 0) 725 goto mapped; 726 if (ret < 0) 727 goto ignore; 728 } 729 730 switch (usage->hid & HID_USAGE_PAGE) { 731 case HID_UP_UNDEFINED: 732 goto ignore; 733 734 case HID_UP_KEYBOARD: 735 set_bit(EV_REP, input->evbit); 736 737 if ((usage->hid & HID_USAGE) < 256) { 738 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 739 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 740 } else 741 map_key(KEY_UNKNOWN); 742 743 break; 744 745 case HID_UP_BUTTON: 746 code = ((usage->hid - 1) & HID_USAGE); 747 748 switch (field->application) { 749 case HID_GD_MOUSE: 750 case HID_GD_POINTER: code += BTN_MOUSE; break; 751 case HID_GD_JOYSTICK: 752 if (code <= 0xf) 753 code += BTN_JOYSTICK; 754 else 755 code += BTN_TRIGGER_HAPPY - 0x10; 756 break; 757 case HID_GD_GAMEPAD: 758 if (code <= 0xf) 759 code += BTN_GAMEPAD; 760 else 761 code += BTN_TRIGGER_HAPPY - 0x10; 762 break; 763 case HID_CP_CONSUMER_CONTROL: 764 if (hidinput_field_in_collection(device, field, 765 HID_COLLECTION_NAMED_ARRAY, 766 HID_CP_PROGRAMMABLEBUTTONS)) { 767 if (code <= 0x1d) 768 code += KEY_MACRO1; 769 else 770 code += BTN_TRIGGER_HAPPY - 0x1e; 771 break; 772 } 773 fallthrough; 774 default: 775 switch (field->physical) { 776 case HID_GD_MOUSE: 777 case HID_GD_POINTER: code += BTN_MOUSE; break; 778 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 779 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 780 default: code += BTN_MISC; 781 } 782 } 783 784 map_key(code); 785 break; 786 787 case HID_UP_SIMULATION: 788 switch (usage->hid & 0xffff) { 789 case 0xba: map_abs(ABS_RUDDER); break; 790 case 0xbb: map_abs(ABS_THROTTLE); break; 791 case 0xc4: map_abs(ABS_GAS); break; 792 case 0xc5: map_abs(ABS_BRAKE); break; 793 case 0xc8: map_abs(ABS_WHEEL); break; 794 default: goto ignore; 795 } 796 break; 797 798 case HID_UP_GENDESK: 799 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 800 switch (usage->hid & 0xf) { 801 case 0x1: map_key_clear(KEY_POWER); break; 802 case 0x2: map_key_clear(KEY_SLEEP); break; 803 case 0x3: map_key_clear(KEY_WAKEUP); break; 804 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 805 case 0x5: map_key_clear(KEY_MENU); break; 806 case 0x6: map_key_clear(KEY_PROG1); break; 807 case 0x7: map_key_clear(KEY_HELP); break; 808 case 0x8: map_key_clear(KEY_EXIT); break; 809 case 0x9: map_key_clear(KEY_SELECT); break; 810 case 0xa: map_key_clear(KEY_RIGHT); break; 811 case 0xb: map_key_clear(KEY_LEFT); break; 812 case 0xc: map_key_clear(KEY_UP); break; 813 case 0xd: map_key_clear(KEY_DOWN); break; 814 case 0xe: map_key_clear(KEY_POWER2); break; 815 case 0xf: map_key_clear(KEY_RESTART); break; 816 default: goto unknown; 817 } 818 break; 819 } 820 821 if ((usage->hid & 0xf0) == 0xa0) { /* SystemControl */ 822 switch (usage->hid & 0xf) { 823 case 0x9: map_key_clear(KEY_MICMUTE); break; 824 default: goto ignore; 825 } 826 break; 827 } 828 829 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 830 switch (usage->hid & 0xf) { 831 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 832 default: goto ignore; 833 } 834 break; 835 } 836 837 /* 838 * Some lazy vendors declare 255 usages for System Control, 839 * leading to the creation of ABS_X|Y axis and too many others. 840 * It wouldn't be a problem if joydev doesn't consider the 841 * device as a joystick then. 842 */ 843 if (field->application == HID_GD_SYSTEM_CONTROL) 844 goto ignore; 845 846 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 847 switch (usage->hid) { 848 case HID_GD_UP: usage->hat_dir = 1; break; 849 case HID_GD_DOWN: usage->hat_dir = 5; break; 850 case HID_GD_RIGHT: usage->hat_dir = 3; break; 851 case HID_GD_LEFT: usage->hat_dir = 7; break; 852 default: goto unknown; 853 } 854 if (field->dpad) { 855 map_abs(field->dpad); 856 goto ignore; 857 } 858 map_abs(ABS_HAT0X); 859 break; 860 } 861 862 switch (usage->hid) { 863 /* These usage IDs map directly to the usage codes. */ 864 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 865 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 866 if (field->flags & HID_MAIN_ITEM_RELATIVE) 867 map_rel(usage->hid & 0xf); 868 else 869 map_abs_clear(usage->hid & 0xf); 870 break; 871 872 case HID_GD_WHEEL: 873 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 874 set_bit(REL_WHEEL, input->relbit); 875 map_rel(REL_WHEEL_HI_RES); 876 } else { 877 map_abs(usage->hid & 0xf); 878 } 879 break; 880 case HID_GD_SLIDER: case HID_GD_DIAL: 881 if (field->flags & HID_MAIN_ITEM_RELATIVE) 882 map_rel(usage->hid & 0xf); 883 else 884 map_abs(usage->hid & 0xf); 885 break; 886 887 case HID_GD_HATSWITCH: 888 usage->hat_min = field->logical_minimum; 889 usage->hat_max = field->logical_maximum; 890 map_abs(ABS_HAT0X); 891 break; 892 893 case HID_GD_START: map_key_clear(BTN_START); break; 894 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 895 896 case HID_GD_RFKILL_BTN: 897 /* MS wireless radio ctl extension, also check CA */ 898 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 899 map_key_clear(KEY_RFKILL); 900 /* We need to simulate the btn release */ 901 field->flags |= HID_MAIN_ITEM_RELATIVE; 902 break; 903 } 904 goto unknown; 905 906 default: goto unknown; 907 } 908 909 break; 910 911 case HID_UP_LED: 912 switch (usage->hid & 0xffff) { /* HID-Value: */ 913 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 914 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 915 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 916 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 917 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 918 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 919 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 920 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 921 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 922 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 923 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 924 925 default: goto ignore; 926 } 927 break; 928 929 case HID_UP_DIGITIZER: 930 if ((field->application & 0xff) == 0x01) /* Digitizer */ 931 __set_bit(INPUT_PROP_POINTER, input->propbit); 932 else if ((field->application & 0xff) == 0x02) /* Pen */ 933 __set_bit(INPUT_PROP_DIRECT, input->propbit); 934 935 switch (usage->hid & 0xff) { 936 case 0x00: /* Undefined */ 937 goto ignore; 938 939 case 0x30: /* TipPressure */ 940 if (!test_bit(BTN_TOUCH, input->keybit)) { 941 device->quirks |= HID_QUIRK_NOTOUCH; 942 set_bit(EV_KEY, input->evbit); 943 set_bit(BTN_TOUCH, input->keybit); 944 } 945 map_abs_clear(ABS_PRESSURE); 946 break; 947 948 case 0x32: /* InRange */ 949 switch (field->physical) { 950 case HID_DG_PUCK: 951 map_key(BTN_TOOL_MOUSE); 952 break; 953 case HID_DG_FINGER: 954 map_key(BTN_TOOL_FINGER); 955 break; 956 default: 957 /* 958 * If the physical is not given, 959 * rely on the application. 960 */ 961 if (!field->physical) { 962 switch (field->application) { 963 case HID_DG_TOUCHSCREEN: 964 case HID_DG_TOUCHPAD: 965 map_key_clear(BTN_TOOL_FINGER); 966 break; 967 default: 968 map_key_clear(BTN_TOOL_PEN); 969 } 970 } else { 971 map_key(BTN_TOOL_PEN); 972 } 973 break; 974 } 975 break; 976 977 case 0x3b: /* Battery Strength */ 978 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 979 usage->type = EV_PWR; 980 return; 981 982 case 0x3c: /* Invert */ 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 by Invert usage when 1009 * tool gets in proximity. 1010 */ 1011 map_key_clear(BTN_TOUCH); 1012 break; 1013 1014 case 0x46: /* TabletPick */ 1015 case 0x5a: /* SecondaryBarrelSwitch */ 1016 map_key_clear(BTN_STYLUS2); 1017 break; 1018 1019 case 0x5b: /* TransducerSerialNumber */ 1020 case 0x6e: /* TransducerSerialNumber2 */ 1021 map_msc(MSC_SERIAL); 1022 break; 1023 1024 default: goto unknown; 1025 } 1026 break; 1027 1028 case HID_UP_TELEPHONY: 1029 switch (usage->hid & HID_USAGE) { 1030 case 0x2f: map_key_clear(KEY_MICMUTE); break; 1031 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 1032 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 1033 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 1034 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 1035 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 1036 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 1037 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 1038 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1039 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1040 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1041 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1042 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1043 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1044 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1045 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1046 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1047 default: goto ignore; 1048 } 1049 break; 1050 1051 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1052 switch (usage->hid & HID_USAGE) { 1053 case 0x000: goto ignore; 1054 case 0x030: map_key_clear(KEY_POWER); break; 1055 case 0x031: map_key_clear(KEY_RESTART); break; 1056 case 0x032: map_key_clear(KEY_SLEEP); break; 1057 case 0x034: map_key_clear(KEY_SLEEP); break; 1058 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1059 case 0x036: map_key_clear(BTN_MISC); break; 1060 1061 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1062 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1063 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1064 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1065 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1066 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1067 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1068 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1069 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1070 1071 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1072 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1073 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1074 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1075 case 0x069: map_key_clear(KEY_RED); break; 1076 case 0x06a: map_key_clear(KEY_GREEN); break; 1077 case 0x06b: map_key_clear(KEY_BLUE); break; 1078 case 0x06c: map_key_clear(KEY_YELLOW); break; 1079 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1080 1081 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1082 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1083 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1084 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1085 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1086 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1087 1088 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1089 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1090 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1091 1092 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1093 case 0x083: map_key_clear(KEY_LAST); break; 1094 case 0x084: map_key_clear(KEY_ENTER); break; 1095 case 0x088: map_key_clear(KEY_PC); break; 1096 case 0x089: map_key_clear(KEY_TV); break; 1097 case 0x08a: map_key_clear(KEY_WWW); break; 1098 case 0x08b: map_key_clear(KEY_DVD); break; 1099 case 0x08c: map_key_clear(KEY_PHONE); break; 1100 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1101 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1102 case 0x08f: map_key_clear(KEY_GAMES); break; 1103 case 0x090: map_key_clear(KEY_MEMO); break; 1104 case 0x091: map_key_clear(KEY_CD); break; 1105 case 0x092: map_key_clear(KEY_VCR); break; 1106 case 0x093: map_key_clear(KEY_TUNER); break; 1107 case 0x094: map_key_clear(KEY_EXIT); break; 1108 case 0x095: map_key_clear(KEY_HELP); break; 1109 case 0x096: map_key_clear(KEY_TAPE); break; 1110 case 0x097: map_key_clear(KEY_TV2); break; 1111 case 0x098: map_key_clear(KEY_SAT); break; 1112 case 0x09a: map_key_clear(KEY_PVR); break; 1113 1114 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1115 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1116 case 0x0a0: map_key_clear(KEY_VCR2); break; 1117 1118 case 0x0b0: map_key_clear(KEY_PLAY); break; 1119 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1120 case 0x0b2: map_key_clear(KEY_RECORD); break; 1121 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1122 case 0x0b4: map_key_clear(KEY_REWIND); break; 1123 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1124 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1125 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1126 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1127 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1128 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1129 case 0x0bf: map_key_clear(KEY_SLOW); break; 1130 1131 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1132 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1133 1134 case 0x0d5: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1135 case 0x0d6: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1136 case 0x0d7: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1137 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1138 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1139 1140 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1141 case 0x0e2: map_key_clear(KEY_MUTE); break; 1142 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1143 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1144 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1145 case 0x0f5: map_key_clear(KEY_SLOW); break; 1146 1147 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1148 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1149 case 0x183: map_key_clear(KEY_CONFIG); break; 1150 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1151 case 0x185: map_key_clear(KEY_EDITOR); break; 1152 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1153 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1154 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1155 case 0x189: map_key_clear(KEY_DATABASE); break; 1156 case 0x18a: map_key_clear(KEY_MAIL); break; 1157 case 0x18b: map_key_clear(KEY_NEWS); break; 1158 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1159 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1160 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1161 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1162 case 0x190: map_key_clear(KEY_JOURNAL); break; 1163 case 0x191: map_key_clear(KEY_FINANCE); break; 1164 case 0x192: map_key_clear(KEY_CALC); break; 1165 case 0x193: map_key_clear(KEY_PLAYER); break; 1166 case 0x194: map_key_clear(KEY_FILE); break; 1167 case 0x196: map_key_clear(KEY_WWW); break; 1168 case 0x199: map_key_clear(KEY_CHAT); break; 1169 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1170 case 0x19e: map_key_clear(KEY_COFFEE); break; 1171 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1172 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1173 case 0x1a3: map_key_clear(KEY_NEXT); break; 1174 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1175 case 0x1a6: map_key_clear(KEY_HELP); break; 1176 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1177 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1178 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1179 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1180 case 0x1b4: map_key_clear(KEY_FILE); break; 1181 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1182 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1183 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1184 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1185 case 0x1bd: map_key_clear(KEY_INFO); break; 1186 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1187 case 0x201: map_key_clear(KEY_NEW); break; 1188 case 0x202: map_key_clear(KEY_OPEN); break; 1189 case 0x203: map_key_clear(KEY_CLOSE); break; 1190 case 0x204: map_key_clear(KEY_EXIT); break; 1191 case 0x207: map_key_clear(KEY_SAVE); break; 1192 case 0x208: map_key_clear(KEY_PRINT); break; 1193 case 0x209: map_key_clear(KEY_PROPS); break; 1194 case 0x21a: map_key_clear(KEY_UNDO); break; 1195 case 0x21b: map_key_clear(KEY_COPY); break; 1196 case 0x21c: map_key_clear(KEY_CUT); break; 1197 case 0x21d: map_key_clear(KEY_PASTE); break; 1198 case 0x21f: map_key_clear(KEY_FIND); break; 1199 case 0x221: map_key_clear(KEY_SEARCH); break; 1200 case 0x222: map_key_clear(KEY_GOTO); break; 1201 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1202 case 0x224: map_key_clear(KEY_BACK); break; 1203 case 0x225: map_key_clear(KEY_FORWARD); break; 1204 case 0x226: map_key_clear(KEY_STOP); break; 1205 case 0x227: map_key_clear(KEY_REFRESH); break; 1206 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1207 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1208 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1209 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1210 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1211 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1212 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1213 case 0x238: /* AC Pan */ 1214 set_bit(REL_HWHEEL, input->relbit); 1215 map_rel(REL_HWHEEL_HI_RES); 1216 break; 1217 case 0x23d: map_key_clear(KEY_EDIT); break; 1218 case 0x25f: map_key_clear(KEY_CANCEL); break; 1219 case 0x269: map_key_clear(KEY_INSERT); break; 1220 case 0x26a: map_key_clear(KEY_DELETE); break; 1221 case 0x279: map_key_clear(KEY_REDO); break; 1222 1223 case 0x289: map_key_clear(KEY_REPLY); break; 1224 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1225 case 0x28c: map_key_clear(KEY_SEND); break; 1226 1227 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1228 1229 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1230 1231 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1232 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1233 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1234 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1235 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1236 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1237 1238 case 0x29f: map_key_clear(KEY_SCALE); break; 1239 1240 default: map_key_clear(KEY_UNKNOWN); 1241 } 1242 break; 1243 1244 case HID_UP_GENDEVCTRLS: 1245 switch (usage->hid) { 1246 case HID_DC_BATTERYSTRENGTH: 1247 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1248 usage->type = EV_PWR; 1249 return; 1250 } 1251 goto unknown; 1252 1253 case HID_UP_BATTERY: 1254 switch (usage->hid) { 1255 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1256 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1257 usage->type = EV_PWR; 1258 return; 1259 case HID_BAT_CHARGING: 1260 usage->type = EV_PWR; 1261 return; 1262 } 1263 goto unknown; 1264 1265 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1266 set_bit(EV_REP, input->evbit); 1267 switch (usage->hid & HID_USAGE) { 1268 case 0x021: map_key_clear(KEY_PRINT); break; 1269 case 0x070: map_key_clear(KEY_HP); break; 1270 case 0x071: map_key_clear(KEY_CAMERA); break; 1271 case 0x072: map_key_clear(KEY_SOUND); break; 1272 case 0x073: map_key_clear(KEY_QUESTION); break; 1273 case 0x080: map_key_clear(KEY_EMAIL); break; 1274 case 0x081: map_key_clear(KEY_CHAT); break; 1275 case 0x082: map_key_clear(KEY_SEARCH); break; 1276 case 0x083: map_key_clear(KEY_CONNECT); break; 1277 case 0x084: map_key_clear(KEY_FINANCE); break; 1278 case 0x085: map_key_clear(KEY_SPORT); break; 1279 case 0x086: map_key_clear(KEY_SHOP); break; 1280 default: goto ignore; 1281 } 1282 break; 1283 1284 case HID_UP_HPVENDOR2: 1285 set_bit(EV_REP, input->evbit); 1286 switch (usage->hid & HID_USAGE) { 1287 case 0x001: map_key_clear(KEY_MICMUTE); break; 1288 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1289 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1290 default: goto ignore; 1291 } 1292 break; 1293 1294 case HID_UP_MSVENDOR: 1295 goto ignore; 1296 1297 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1298 set_bit(EV_REP, input->evbit); 1299 goto ignore; 1300 1301 case HID_UP_LOGIVENDOR: 1302 /* intentional fallback */ 1303 case HID_UP_LOGIVENDOR2: 1304 /* intentional fallback */ 1305 case HID_UP_LOGIVENDOR3: 1306 goto ignore; 1307 1308 case HID_UP_PID: 1309 switch (usage->hid & HID_USAGE) { 1310 case 0xa4: map_key_clear(BTN_DEAD); break; 1311 default: goto ignore; 1312 } 1313 break; 1314 1315 default: 1316 unknown: 1317 if (field->report_size == 1) { 1318 if (field->report->type == HID_OUTPUT_REPORT) { 1319 map_led(LED_MISC); 1320 break; 1321 } 1322 map_key(BTN_MISC); 1323 break; 1324 } 1325 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1326 map_rel(REL_MISC); 1327 break; 1328 } 1329 map_abs(ABS_MISC); 1330 break; 1331 } 1332 1333 mapped: 1334 /* Mapping failed, bail out */ 1335 if (!bit) 1336 return; 1337 1338 if (device->driver->input_mapped && 1339 device->driver->input_mapped(device, hidinput, field, usage, 1340 &bit, &max) < 0) { 1341 /* 1342 * The driver indicated that no further generic handling 1343 * of the usage is desired. 1344 */ 1345 return; 1346 } 1347 1348 set_bit(usage->type, input->evbit); 1349 1350 /* 1351 * This part is *really* controversial: 1352 * - HID aims at being generic so we should do our best to export 1353 * all incoming events 1354 * - HID describes what events are, so there is no reason for ABS_X 1355 * to be mapped to ABS_Y 1356 * - HID is using *_MISC+N as a default value, but nothing prevents 1357 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1358 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1359 * processing) 1360 * 1361 * If devices still want to use this (at their own risk), they will 1362 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1363 * the default should be a reliable mapping. 1364 */ 1365 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1366 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1367 usage->code = find_next_zero_bit(bit, 1368 max + 1, 1369 usage->code); 1370 } else { 1371 device->status |= HID_STAT_DUP_DETECTED; 1372 goto ignore; 1373 } 1374 } 1375 1376 if (usage->code > max) 1377 goto ignore; 1378 1379 if (usage->type == EV_ABS) { 1380 1381 int a = field->logical_minimum; 1382 int b = field->logical_maximum; 1383 1384 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1385 a = field->logical_minimum = 0; 1386 b = field->logical_maximum = 255; 1387 } 1388 1389 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1390 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1391 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1392 1393 input_abs_set_res(input, usage->code, 1394 hidinput_calc_abs_res(field, usage->code)); 1395 1396 /* use a larger default input buffer for MT devices */ 1397 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1398 input_set_events_per_packet(input, 60); 1399 } 1400 1401 if (usage->type == EV_ABS && 1402 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1403 int i; 1404 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1405 input_set_abs_params(input, i, -1, 1, 0, 0); 1406 set_bit(i, input->absbit); 1407 } 1408 if (usage->hat_dir && !field->dpad) 1409 field->dpad = usage->code; 1410 } 1411 1412 /* for those devices which produce Consumer volume usage as relative, 1413 * we emulate pressing volumeup/volumedown appropriate number of times 1414 * in hidinput_hid_event() 1415 */ 1416 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1417 (usage->code == ABS_VOLUME)) { 1418 set_bit(KEY_VOLUMEUP, input->keybit); 1419 set_bit(KEY_VOLUMEDOWN, input->keybit); 1420 } 1421 1422 if (usage->type == EV_KEY) { 1423 set_bit(EV_MSC, input->evbit); 1424 set_bit(MSC_SCAN, input->mscbit); 1425 } 1426 1427 return; 1428 1429 ignore: 1430 usage->type = 0; 1431 usage->code = 0; 1432 } 1433 1434 static void hidinput_handle_scroll(struct hid_usage *usage, 1435 struct input_dev *input, 1436 __s32 value) 1437 { 1438 int code; 1439 int hi_res, lo_res; 1440 1441 if (value == 0) 1442 return; 1443 1444 if (usage->code == REL_WHEEL_HI_RES) 1445 code = REL_WHEEL; 1446 else 1447 code = REL_HWHEEL; 1448 1449 /* 1450 * Windows reports one wheel click as value 120. Where a high-res 1451 * scroll wheel is present, a fraction of 120 is reported instead. 1452 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1453 * adhere to the 120 expectation. 1454 */ 1455 hi_res = value * 120/usage->resolution_multiplier; 1456 1457 usage->wheel_accumulated += hi_res; 1458 lo_res = usage->wheel_accumulated/120; 1459 if (lo_res) 1460 usage->wheel_accumulated -= lo_res * 120; 1461 1462 input_event(input, EV_REL, code, lo_res); 1463 input_event(input, EV_REL, usage->code, hi_res); 1464 } 1465 1466 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1467 unsigned int tool) 1468 { 1469 /* if the given tool is not currently reported, ignore */ 1470 if (!test_bit(tool, input->key)) 1471 return; 1472 1473 /* 1474 * if the given tool was previously set, release it, 1475 * release any TOUCH and send an EV_SYN 1476 */ 1477 input_event(input, EV_KEY, BTN_TOUCH, 0); 1478 input_event(input, EV_KEY, tool, 0); 1479 input_event(input, EV_SYN, SYN_REPORT, 0); 1480 1481 report->tool = 0; 1482 } 1483 1484 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1485 unsigned int new_tool) 1486 { 1487 if (report->tool != new_tool) 1488 hid_report_release_tool(report, input, report->tool); 1489 1490 input_event(input, EV_KEY, new_tool, 1); 1491 report->tool = new_tool; 1492 } 1493 1494 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1495 { 1496 struct input_dev *input; 1497 struct hid_report *report = field->report; 1498 unsigned *quirks = &hid->quirks; 1499 1500 if (!usage->type) 1501 return; 1502 1503 if (usage->type == EV_PWR) { 1504 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value); 1505 1506 if (!handled) 1507 hidinput_update_battery(hid, value); 1508 1509 return; 1510 } 1511 1512 if (!field->hidinput) 1513 return; 1514 1515 input = field->hidinput->input; 1516 1517 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1518 int hat_dir = usage->hat_dir; 1519 if (!hat_dir) 1520 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1521 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1522 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1523 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1524 return; 1525 } 1526 1527 /* 1528 * Ignore out-of-range values as per HID specification, 1529 * section 5.10 and 6.2.25, when NULL state bit is present. 1530 * When it's not, clamp the value to match Microsoft's input 1531 * driver as mentioned in "Required HID usages for digitizers": 1532 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1533 * 1534 * The logical_minimum < logical_maximum check is done so that we 1535 * don't unintentionally discard values sent by devices which 1536 * don't specify logical min and max. 1537 */ 1538 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1539 field->logical_minimum < field->logical_maximum) { 1540 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1541 (value < field->logical_minimum || 1542 value > field->logical_maximum)) { 1543 dbg_hid("Ignoring out-of-range value %x\n", value); 1544 return; 1545 } 1546 value = clamp(value, 1547 field->logical_minimum, 1548 field->logical_maximum); 1549 } 1550 1551 switch (usage->hid) { 1552 case HID_DG_ERASER: 1553 report->tool_active |= !!value; 1554 1555 /* 1556 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1557 * to accommodate for devices not following the spec. 1558 */ 1559 if (value) 1560 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1561 else if (report->tool != BTN_TOOL_RUBBER) 1562 /* value is off, tool is not rubber, ignore */ 1563 return; 1564 1565 /* let hid-input set BTN_TOUCH */ 1566 break; 1567 1568 case HID_DG_INVERT: 1569 report->tool_active |= !!value; 1570 1571 /* 1572 * If invert is set, we store BTN_TOOL_RUBBER. 1573 */ 1574 if (value) 1575 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1576 else if (!report->tool_active) 1577 /* tool_active not set means Invert and Eraser are not set */ 1578 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1579 1580 /* no further processing */ 1581 return; 1582 1583 case HID_DG_INRANGE: 1584 report->tool_active |= !!value; 1585 1586 if (report->tool_active) { 1587 /* 1588 * if tool is not set but is marked as active, 1589 * assume ours 1590 */ 1591 if (!report->tool) 1592 report->tool = usage->code; 1593 1594 /* drivers may have changed the value behind our back, resend it */ 1595 hid_report_set_tool(report, input, report->tool); 1596 } else { 1597 hid_report_release_tool(report, input, usage->code); 1598 } 1599 1600 /* reset tool_active for the next event */ 1601 report->tool_active = false; 1602 1603 /* no further processing */ 1604 return; 1605 1606 case HID_DG_TIPSWITCH: 1607 report->tool_active |= !!value; 1608 1609 /* if tool is set to RUBBER we should ignore the current value */ 1610 if (report->tool == BTN_TOOL_RUBBER) 1611 return; 1612 1613 break; 1614 1615 case HID_DG_TIPPRESSURE: 1616 if (*quirks & HID_QUIRK_NOTOUCH) { 1617 int a = field->logical_minimum; 1618 int b = field->logical_maximum; 1619 1620 if (value > a + ((b - a) >> 3)) { 1621 input_event(input, EV_KEY, BTN_TOUCH, 1); 1622 report->tool_active = true; 1623 } 1624 } 1625 break; 1626 1627 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1628 dbg_hid("Maximum Effects - %d\n",value); 1629 return; 1630 1631 case HID_UP_PID | 0x7fUL: 1632 dbg_hid("PID Pool Report\n"); 1633 return; 1634 } 1635 1636 switch (usage->type) { 1637 case EV_KEY: 1638 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1639 return; 1640 break; 1641 1642 case EV_REL: 1643 if (usage->code == REL_WHEEL_HI_RES || 1644 usage->code == REL_HWHEEL_HI_RES) { 1645 hidinput_handle_scroll(usage, input, value); 1646 return; 1647 } 1648 break; 1649 1650 case EV_ABS: 1651 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1652 usage->code == ABS_VOLUME) { 1653 int count = abs(value); 1654 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1655 int i; 1656 1657 for (i = 0; i < count; i++) { 1658 input_event(input, EV_KEY, direction, 1); 1659 input_sync(input); 1660 input_event(input, EV_KEY, direction, 0); 1661 input_sync(input); 1662 } 1663 return; 1664 1665 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1666 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1667 value = field->logical_maximum - value; 1668 break; 1669 } 1670 1671 /* 1672 * Ignore reports for absolute data if the data didn't change. This is 1673 * not only an optimization but also fixes 'dead' key reports. Some 1674 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1675 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1676 * can only have one of them physically available. The 'dead' keys 1677 * report constant 0. As all map to the same keycode, they'd confuse 1678 * the input layer. If we filter the 'dead' keys on the HID level, we 1679 * skip the keycode translation and only forward real events. 1680 */ 1681 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1682 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1683 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1684 usage->usage_index < field->maxusage && 1685 value == field->value[usage->usage_index]) 1686 return; 1687 1688 /* report the usage code as scancode if the key status has changed */ 1689 if (usage->type == EV_KEY && 1690 (!test_bit(usage->code, input->key)) == value) 1691 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1692 1693 input_event(input, usage->type, usage->code, value); 1694 1695 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1696 usage->type == EV_KEY && value) { 1697 input_sync(input); 1698 input_event(input, usage->type, usage->code, 0); 1699 } 1700 } 1701 1702 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1703 { 1704 struct hid_input *hidinput; 1705 1706 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1707 return; 1708 1709 list_for_each_entry(hidinput, &hid->inputs, list) 1710 input_sync(hidinput->input); 1711 } 1712 EXPORT_SYMBOL_GPL(hidinput_report_event); 1713 1714 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1715 unsigned int code, struct hid_field **field) 1716 { 1717 struct hid_report *report; 1718 int i, j; 1719 1720 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1721 for (i = 0; i < report->maxfield; i++) { 1722 *field = report->field[i]; 1723 for (j = 0; j < (*field)->maxusage; j++) 1724 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1725 return j; 1726 } 1727 } 1728 return -1; 1729 } 1730 1731 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1732 { 1733 struct hid_report *report; 1734 struct hid_field *field; 1735 int i, j; 1736 1737 list_for_each_entry(report, 1738 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1739 list) { 1740 for (i = 0; i < report->maxfield; i++) { 1741 field = report->field[i]; 1742 for (j = 0; j < field->maxusage; j++) 1743 if (field->usage[j].type == EV_LED) 1744 return field; 1745 } 1746 } 1747 return NULL; 1748 } 1749 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1750 1751 unsigned int hidinput_count_leds(struct hid_device *hid) 1752 { 1753 struct hid_report *report; 1754 struct hid_field *field; 1755 int i, j; 1756 unsigned int count = 0; 1757 1758 list_for_each_entry(report, 1759 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1760 list) { 1761 for (i = 0; i < report->maxfield; i++) { 1762 field = report->field[i]; 1763 for (j = 0; j < field->maxusage; j++) 1764 if (field->usage[j].type == EV_LED && 1765 field->value[j]) 1766 count += 1; 1767 } 1768 } 1769 return count; 1770 } 1771 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1772 1773 static void hidinput_led_worker(struct work_struct *work) 1774 { 1775 struct hid_device *hid = container_of(work, struct hid_device, 1776 led_work); 1777 struct hid_field *field; 1778 struct hid_report *report; 1779 int ret; 1780 u32 len; 1781 __u8 *buf; 1782 1783 field = hidinput_get_led_field(hid); 1784 if (!field) 1785 return; 1786 1787 /* 1788 * field->report is accessed unlocked regarding HID core. So there might 1789 * be another incoming SET-LED request from user-space, which changes 1790 * the LED state while we assemble our outgoing buffer. However, this 1791 * doesn't matter as hid_output_report() correctly converts it into a 1792 * boolean value no matter what information is currently set on the LED 1793 * field (even garbage). So the remote device will always get a valid 1794 * request. 1795 * And in case we send a wrong value, a next led worker is spawned 1796 * for every SET-LED request so the following worker will send the 1797 * correct value, guaranteed! 1798 */ 1799 1800 report = field->report; 1801 1802 /* use custom SET_REPORT request if possible (asynchronous) */ 1803 if (hid->ll_driver->request) 1804 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1805 1806 /* fall back to generic raw-output-report */ 1807 len = hid_report_len(report); 1808 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1809 if (!buf) 1810 return; 1811 1812 hid_output_report(report, buf); 1813 /* synchronous output report */ 1814 ret = hid_hw_output_report(hid, buf, len); 1815 if (ret == -ENOSYS) 1816 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1817 HID_REQ_SET_REPORT); 1818 kfree(buf); 1819 } 1820 1821 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1822 unsigned int code, int value) 1823 { 1824 struct hid_device *hid = input_get_drvdata(dev); 1825 struct hid_field *field; 1826 int offset; 1827 1828 if (type == EV_FF) 1829 return input_ff_event(dev, type, code, value); 1830 1831 if (type != EV_LED) 1832 return -1; 1833 1834 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1835 hid_warn(dev, "event field not found\n"); 1836 return -1; 1837 } 1838 1839 hid_set_field(field, offset, value); 1840 1841 schedule_work(&hid->led_work); 1842 return 0; 1843 } 1844 1845 static int hidinput_open(struct input_dev *dev) 1846 { 1847 struct hid_device *hid = input_get_drvdata(dev); 1848 1849 return hid_hw_open(hid); 1850 } 1851 1852 static void hidinput_close(struct input_dev *dev) 1853 { 1854 struct hid_device *hid = input_get_drvdata(dev); 1855 1856 hid_hw_close(hid); 1857 } 1858 1859 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1860 struct hid_report *report, bool use_logical_max) 1861 { 1862 struct hid_usage *usage; 1863 bool update_needed = false; 1864 bool get_report_completed = false; 1865 int i, j; 1866 1867 if (report->maxfield == 0) 1868 return false; 1869 1870 for (i = 0; i < report->maxfield; i++) { 1871 __s32 value = use_logical_max ? 1872 report->field[i]->logical_maximum : 1873 report->field[i]->logical_minimum; 1874 1875 /* There is no good reason for a Resolution 1876 * Multiplier to have a count other than 1. 1877 * Ignore that case. 1878 */ 1879 if (report->field[i]->report_count != 1) 1880 continue; 1881 1882 for (j = 0; j < report->field[i]->maxusage; j++) { 1883 usage = &report->field[i]->usage[j]; 1884 1885 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1886 continue; 1887 1888 /* 1889 * If we have more than one feature within this 1890 * report we need to fill in the bits from the 1891 * others before we can overwrite the ones for the 1892 * Resolution Multiplier. 1893 * 1894 * But if we're not allowed to read from the device, 1895 * we just bail. Such a device should not exist 1896 * anyway. 1897 */ 1898 if (!get_report_completed && report->maxfield > 1) { 1899 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1900 return update_needed; 1901 1902 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1903 hid_hw_wait(hid); 1904 get_report_completed = true; 1905 } 1906 1907 report->field[i]->value[j] = value; 1908 update_needed = true; 1909 } 1910 } 1911 1912 return update_needed; 1913 } 1914 1915 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1916 { 1917 struct hid_report_enum *rep_enum; 1918 struct hid_report *rep; 1919 int ret; 1920 1921 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1922 list_for_each_entry(rep, &rep_enum->report_list, list) { 1923 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1924 rep, true); 1925 1926 if (update_needed) { 1927 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1928 if (ret) { 1929 __hidinput_change_resolution_multipliers(hid, 1930 rep, false); 1931 return; 1932 } 1933 } 1934 } 1935 1936 /* refresh our structs */ 1937 hid_setup_resolution_multiplier(hid); 1938 } 1939 1940 static void report_features(struct hid_device *hid) 1941 { 1942 struct hid_driver *drv = hid->driver; 1943 struct hid_report_enum *rep_enum; 1944 struct hid_report *rep; 1945 struct hid_usage *usage; 1946 int i, j; 1947 1948 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1949 list_for_each_entry(rep, &rep_enum->report_list, list) 1950 for (i = 0; i < rep->maxfield; i++) { 1951 /* Ignore if report count is out of bounds. */ 1952 if (rep->field[i]->report_count < 1) 1953 continue; 1954 1955 for (j = 0; j < rep->field[i]->maxusage; j++) { 1956 usage = &rep->field[i]->usage[j]; 1957 1958 /* Verify if Battery Strength feature is available */ 1959 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1960 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1961 rep->field[i], false); 1962 1963 if (drv->feature_mapping) 1964 drv->feature_mapping(hid, rep->field[i], usage); 1965 } 1966 } 1967 } 1968 1969 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1970 unsigned int application) 1971 { 1972 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1973 struct input_dev *input_dev = input_allocate_device(); 1974 const char *suffix = NULL; 1975 size_t suffix_len, name_len; 1976 1977 if (!hidinput || !input_dev) 1978 goto fail; 1979 1980 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1981 hid->maxapplication > 1) { 1982 switch (application) { 1983 case HID_GD_KEYBOARD: 1984 suffix = "Keyboard"; 1985 break; 1986 case HID_GD_KEYPAD: 1987 suffix = "Keypad"; 1988 break; 1989 case HID_GD_MOUSE: 1990 suffix = "Mouse"; 1991 break; 1992 case HID_DG_PEN: 1993 /* 1994 * yes, there is an issue here: 1995 * DG_PEN -> "Stylus" 1996 * DG_STYLUS -> "Pen" 1997 * But changing this now means users with config snippets 1998 * will have to change it and the test suite will not be happy. 1999 */ 2000 suffix = "Stylus"; 2001 break; 2002 case HID_DG_STYLUS: 2003 suffix = "Pen"; 2004 break; 2005 case HID_DG_TOUCHSCREEN: 2006 suffix = "Touchscreen"; 2007 break; 2008 case HID_DG_TOUCHPAD: 2009 suffix = "Touchpad"; 2010 break; 2011 case HID_GD_SYSTEM_CONTROL: 2012 suffix = "System Control"; 2013 break; 2014 case HID_CP_CONSUMER_CONTROL: 2015 suffix = "Consumer Control"; 2016 break; 2017 case HID_GD_WIRELESS_RADIO_CTLS: 2018 suffix = "Wireless Radio Control"; 2019 break; 2020 case HID_GD_SYSTEM_MULTIAXIS: 2021 suffix = "System Multi Axis"; 2022 break; 2023 default: 2024 break; 2025 } 2026 } 2027 2028 if (suffix) { 2029 name_len = strlen(hid->name); 2030 suffix_len = strlen(suffix); 2031 if ((name_len < suffix_len) || 2032 strcmp(hid->name + name_len - suffix_len, suffix)) { 2033 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 2034 hid->name, suffix); 2035 if (!hidinput->name) 2036 goto fail; 2037 } 2038 } 2039 2040 input_set_drvdata(input_dev, hid); 2041 input_dev->event = hidinput_input_event; 2042 input_dev->open = hidinput_open; 2043 input_dev->close = hidinput_close; 2044 input_dev->setkeycode = hidinput_setkeycode; 2045 input_dev->getkeycode = hidinput_getkeycode; 2046 2047 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2048 input_dev->phys = hid->phys; 2049 input_dev->uniq = hid->uniq; 2050 input_dev->id.bustype = hid->bus; 2051 input_dev->id.vendor = hid->vendor; 2052 input_dev->id.product = hid->product; 2053 input_dev->id.version = hid->version; 2054 input_dev->dev.parent = &hid->dev; 2055 2056 hidinput->input = input_dev; 2057 hidinput->application = application; 2058 list_add_tail(&hidinput->list, &hid->inputs); 2059 2060 INIT_LIST_HEAD(&hidinput->reports); 2061 2062 return hidinput; 2063 2064 fail: 2065 kfree(hidinput); 2066 input_free_device(input_dev); 2067 hid_err(hid, "Out of memory during hid input probe\n"); 2068 return NULL; 2069 } 2070 2071 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2072 { 2073 int i; 2074 unsigned long r = 0; 2075 2076 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2077 r |= hidinput->input->evbit[i]; 2078 2079 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2080 r |= hidinput->input->keybit[i]; 2081 2082 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2083 r |= hidinput->input->relbit[i]; 2084 2085 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2086 r |= hidinput->input->absbit[i]; 2087 2088 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2089 r |= hidinput->input->mscbit[i]; 2090 2091 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2092 r |= hidinput->input->ledbit[i]; 2093 2094 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2095 r |= hidinput->input->sndbit[i]; 2096 2097 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2098 r |= hidinput->input->ffbit[i]; 2099 2100 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2101 r |= hidinput->input->swbit[i]; 2102 2103 return !!r; 2104 } 2105 2106 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2107 struct hid_input *hidinput) 2108 { 2109 struct hid_report *report; 2110 int i, k; 2111 2112 list_del(&hidinput->list); 2113 input_free_device(hidinput->input); 2114 kfree(hidinput->name); 2115 2116 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2117 if (k == HID_OUTPUT_REPORT && 2118 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2119 continue; 2120 2121 list_for_each_entry(report, &hid->report_enum[k].report_list, 2122 list) { 2123 2124 for (i = 0; i < report->maxfield; i++) 2125 if (report->field[i]->hidinput == hidinput) 2126 report->field[i]->hidinput = NULL; 2127 } 2128 } 2129 2130 kfree(hidinput); 2131 } 2132 2133 static struct hid_input *hidinput_match(struct hid_report *report) 2134 { 2135 struct hid_device *hid = report->device; 2136 struct hid_input *hidinput; 2137 2138 list_for_each_entry(hidinput, &hid->inputs, list) { 2139 if (hidinput->report && 2140 hidinput->report->id == report->id) 2141 return hidinput; 2142 } 2143 2144 return NULL; 2145 } 2146 2147 static struct hid_input *hidinput_match_application(struct hid_report *report) 2148 { 2149 struct hid_device *hid = report->device; 2150 struct hid_input *hidinput; 2151 2152 list_for_each_entry(hidinput, &hid->inputs, list) { 2153 if (hidinput->application == report->application) 2154 return hidinput; 2155 2156 /* 2157 * Keep SystemControl and ConsumerControl applications together 2158 * with the main keyboard, if present. 2159 */ 2160 if ((report->application == HID_GD_SYSTEM_CONTROL || 2161 report->application == HID_CP_CONSUMER_CONTROL) && 2162 hidinput->application == HID_GD_KEYBOARD) { 2163 return hidinput; 2164 } 2165 } 2166 2167 return NULL; 2168 } 2169 2170 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2171 struct hid_report *report) 2172 { 2173 int i, j, k; 2174 int first_field_index = 0; 2175 int slot_collection_index = -1; 2176 int prev_collection_index = -1; 2177 unsigned int slot_idx = 0; 2178 struct hid_field *field; 2179 2180 /* 2181 * First tag all the fields that are part of a slot, 2182 * a slot needs to have one Contact ID in the collection 2183 */ 2184 for (i = 0; i < report->maxfield; i++) { 2185 field = report->field[i]; 2186 2187 /* ignore fields without usage */ 2188 if (field->maxusage < 1) 2189 continue; 2190 2191 /* 2192 * janitoring when collection_index changes 2193 */ 2194 if (prev_collection_index != field->usage->collection_index) { 2195 prev_collection_index = field->usage->collection_index; 2196 first_field_index = i; 2197 } 2198 2199 /* 2200 * if we already found a Contact ID in the collection, 2201 * tag and continue to the next. 2202 */ 2203 if (slot_collection_index == field->usage->collection_index) { 2204 field->slot_idx = slot_idx; 2205 continue; 2206 } 2207 2208 /* check if the current field has Contact ID */ 2209 for (j = 0; j < field->maxusage; j++) { 2210 if (field->usage[j].hid == HID_DG_CONTACTID) { 2211 slot_collection_index = field->usage->collection_index; 2212 slot_idx++; 2213 2214 /* 2215 * mark all previous fields and this one in the 2216 * current collection to be slotted. 2217 */ 2218 for (k = first_field_index; k <= i; k++) 2219 report->field[k]->slot_idx = slot_idx; 2220 break; 2221 } 2222 } 2223 } 2224 2225 for (i = 0; i < report->maxfield; i++) 2226 for (j = 0; j < report->field[i]->maxusage; j++) 2227 hidinput_configure_usage(hidinput, report->field[i], 2228 report->field[i]->usage + j, 2229 j); 2230 } 2231 2232 /* 2233 * Register the input device; print a message. 2234 * Configure the input layer interface 2235 * Read all reports and initialize the absolute field values. 2236 */ 2237 2238 int hidinput_connect(struct hid_device *hid, unsigned int force) 2239 { 2240 struct hid_driver *drv = hid->driver; 2241 struct hid_report *report; 2242 struct hid_input *next, *hidinput = NULL; 2243 unsigned int application; 2244 int i, k; 2245 2246 INIT_LIST_HEAD(&hid->inputs); 2247 INIT_WORK(&hid->led_work, hidinput_led_worker); 2248 2249 hid->status &= ~HID_STAT_DUP_DETECTED; 2250 2251 if (!force) { 2252 for (i = 0; i < hid->maxcollection; i++) { 2253 struct hid_collection *col = &hid->collection[i]; 2254 if (col->type == HID_COLLECTION_APPLICATION || 2255 col->type == HID_COLLECTION_PHYSICAL) 2256 if (IS_INPUT_APPLICATION(col->usage)) 2257 break; 2258 } 2259 2260 if (i == hid->maxcollection) 2261 return -1; 2262 } 2263 2264 report_features(hid); 2265 2266 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2267 if (k == HID_OUTPUT_REPORT && 2268 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2269 continue; 2270 2271 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2272 2273 if (!report->maxfield) 2274 continue; 2275 2276 application = report->application; 2277 2278 /* 2279 * Find the previous hidinput report attached 2280 * to this report id. 2281 */ 2282 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2283 hidinput = hidinput_match(report); 2284 else if (hid->maxapplication > 1 && 2285 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2286 hidinput = hidinput_match_application(report); 2287 2288 if (!hidinput) { 2289 hidinput = hidinput_allocate(hid, application); 2290 if (!hidinput) 2291 goto out_unwind; 2292 } 2293 2294 hidinput_configure_usages(hidinput, report); 2295 2296 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2297 hidinput->report = report; 2298 2299 list_add_tail(&report->hidinput_list, 2300 &hidinput->reports); 2301 } 2302 } 2303 2304 hidinput_change_resolution_multipliers(hid); 2305 2306 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2307 if (drv->input_configured && 2308 drv->input_configured(hid, hidinput)) 2309 goto out_unwind; 2310 2311 if (!hidinput_has_been_populated(hidinput)) { 2312 /* no need to register an input device not populated */ 2313 hidinput_cleanup_hidinput(hid, hidinput); 2314 continue; 2315 } 2316 2317 if (input_register_device(hidinput->input)) 2318 goto out_unwind; 2319 hidinput->registered = true; 2320 } 2321 2322 if (list_empty(&hid->inputs)) { 2323 hid_err(hid, "No inputs registered, leaving\n"); 2324 goto out_unwind; 2325 } 2326 2327 if (hid->status & HID_STAT_DUP_DETECTED) 2328 hid_dbg(hid, 2329 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2330 2331 return 0; 2332 2333 out_unwind: 2334 /* unwind the ones we already registered */ 2335 hidinput_disconnect(hid); 2336 2337 return -1; 2338 } 2339 EXPORT_SYMBOL_GPL(hidinput_connect); 2340 2341 void hidinput_disconnect(struct hid_device *hid) 2342 { 2343 struct hid_input *hidinput, *next; 2344 2345 hidinput_cleanup_battery(hid); 2346 2347 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2348 list_del(&hidinput->list); 2349 if (hidinput->registered) 2350 input_unregister_device(hidinput->input); 2351 else 2352 input_free_device(hidinput->input); 2353 kfree(hidinput->name); 2354 kfree(hidinput); 2355 } 2356 2357 /* led_work is spawned by input_dev callbacks, but doesn't access the 2358 * parent input_dev at all. Once all input devices are removed, we 2359 * know that led_work will never get restarted, so we can cancel it 2360 * synchronously and are safe. */ 2361 cancel_work_sync(&hid->led_work); 2362 } 2363 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2364 2365 #ifdef CONFIG_HID_KUNIT_TEST 2366 #include "hid-input-test.c" 2367 #endif 2368