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_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15), 382 HID_BATTERY_QUIRK_IGNORE }, 383 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100), 384 HID_BATTERY_QUIRK_IGNORE }, 385 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV), 386 HID_BATTERY_QUIRK_IGNORE }, 387 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15), 388 HID_BATTERY_QUIRK_IGNORE }, 389 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG), 390 HID_BATTERY_QUIRK_IGNORE }, 391 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN), 392 HID_BATTERY_QUIRK_IGNORE }, 393 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN), 394 HID_BATTERY_QUIRK_IGNORE }, 395 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN), 396 HID_BATTERY_QUIRK_IGNORE }, 397 {} 398 }; 399 400 static unsigned find_battery_quirk(struct hid_device *hdev) 401 { 402 unsigned quirks = 0; 403 const struct hid_device_id *match; 404 405 match = hid_match_id(hdev, hid_battery_quirks); 406 if (match != NULL) 407 quirks = match->driver_data; 408 409 return quirks; 410 } 411 412 static int hidinput_scale_battery_capacity(struct hid_device *dev, 413 int value) 414 { 415 if (dev->battery_min < dev->battery_max && 416 value >= dev->battery_min && value <= dev->battery_max) 417 value = ((value - dev->battery_min) * 100) / 418 (dev->battery_max - dev->battery_min); 419 420 return value; 421 } 422 423 static int hidinput_query_battery_capacity(struct hid_device *dev) 424 { 425 u8 *buf; 426 int ret; 427 428 buf = kmalloc(4, GFP_KERNEL); 429 if (!buf) 430 return -ENOMEM; 431 432 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 433 dev->battery_report_type, HID_REQ_GET_REPORT); 434 if (ret < 2) { 435 kfree(buf); 436 return -ENODATA; 437 } 438 439 ret = hidinput_scale_battery_capacity(dev, buf[1]); 440 kfree(buf); 441 return ret; 442 } 443 444 static int hidinput_get_battery_property(struct power_supply *psy, 445 enum power_supply_property prop, 446 union power_supply_propval *val) 447 { 448 struct hid_device *dev = power_supply_get_drvdata(psy); 449 int value; 450 int ret = 0; 451 452 switch (prop) { 453 case POWER_SUPPLY_PROP_PRESENT: 454 case POWER_SUPPLY_PROP_ONLINE: 455 val->intval = 1; 456 break; 457 458 case POWER_SUPPLY_PROP_CAPACITY: 459 if (dev->battery_status != HID_BATTERY_REPORTED && 460 !dev->battery_avoid_query) { 461 value = hidinput_query_battery_capacity(dev); 462 if (value < 0) 463 return value; 464 } else { 465 value = dev->battery_capacity; 466 } 467 468 val->intval = value; 469 break; 470 471 case POWER_SUPPLY_PROP_MODEL_NAME: 472 val->strval = dev->name; 473 break; 474 475 case POWER_SUPPLY_PROP_STATUS: 476 if (dev->battery_status != HID_BATTERY_REPORTED && 477 !dev->battery_avoid_query) { 478 value = hidinput_query_battery_capacity(dev); 479 if (value < 0) 480 return value; 481 482 dev->battery_capacity = value; 483 dev->battery_status = HID_BATTERY_QUERIED; 484 } 485 486 if (dev->battery_status == HID_BATTERY_UNKNOWN) 487 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 488 else 489 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 490 break; 491 492 case POWER_SUPPLY_PROP_SCOPE: 493 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 494 break; 495 496 default: 497 ret = -EINVAL; 498 break; 499 } 500 501 return ret; 502 } 503 504 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 505 struct hid_field *field, bool is_percentage) 506 { 507 struct power_supply_desc *psy_desc; 508 struct power_supply_config psy_cfg = { .drv_data = dev, }; 509 unsigned quirks; 510 s32 min, max; 511 int error; 512 513 if (dev->battery) 514 return 0; /* already initialized? */ 515 516 quirks = find_battery_quirk(dev); 517 518 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 519 dev->bus, dev->vendor, dev->product, dev->version, quirks); 520 521 if (quirks & HID_BATTERY_QUIRK_IGNORE) 522 return 0; 523 524 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 525 if (!psy_desc) 526 return -ENOMEM; 527 528 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 529 strlen(dev->uniq) ? 530 dev->uniq : dev_name(&dev->dev)); 531 if (!psy_desc->name) { 532 error = -ENOMEM; 533 goto err_free_mem; 534 } 535 536 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 537 psy_desc->properties = hidinput_battery_props; 538 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 539 psy_desc->use_for_apm = 0; 540 psy_desc->get_property = hidinput_get_battery_property; 541 542 min = field->logical_minimum; 543 max = field->logical_maximum; 544 545 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 546 min = 0; 547 max = 100; 548 } 549 550 if (quirks & HID_BATTERY_QUIRK_FEATURE) 551 report_type = HID_FEATURE_REPORT; 552 553 dev->battery_min = min; 554 dev->battery_max = max; 555 dev->battery_report_type = report_type; 556 dev->battery_report_id = field->report->id; 557 558 /* 559 * Stylus is normally not connected to the device and thus we 560 * can't query the device and get meaningful battery strength. 561 * We have to wait for the device to report it on its own. 562 */ 563 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 564 field->physical == HID_DG_STYLUS; 565 566 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 567 dev->battery_avoid_query = true; 568 569 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 570 if (IS_ERR(dev->battery)) { 571 error = PTR_ERR(dev->battery); 572 hid_warn(dev, "can't register power supply: %d\n", error); 573 goto err_free_name; 574 } 575 576 power_supply_powers(dev->battery, &dev->dev); 577 return 0; 578 579 err_free_name: 580 kfree(psy_desc->name); 581 err_free_mem: 582 kfree(psy_desc); 583 dev->battery = NULL; 584 return error; 585 } 586 587 static void hidinput_cleanup_battery(struct hid_device *dev) 588 { 589 const struct power_supply_desc *psy_desc; 590 591 if (!dev->battery) 592 return; 593 594 psy_desc = dev->battery->desc; 595 power_supply_unregister(dev->battery); 596 kfree(psy_desc->name); 597 kfree(psy_desc); 598 dev->battery = NULL; 599 } 600 601 static void hidinput_update_battery(struct hid_device *dev, int value) 602 { 603 int capacity; 604 605 if (!dev->battery) 606 return; 607 608 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 609 return; 610 611 capacity = hidinput_scale_battery_capacity(dev, value); 612 613 if (dev->battery_status != HID_BATTERY_REPORTED || 614 capacity != dev->battery_capacity || 615 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 616 dev->battery_capacity = capacity; 617 dev->battery_status = HID_BATTERY_REPORTED; 618 dev->battery_ratelimit_time = 619 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 620 power_supply_changed(dev->battery); 621 } 622 } 623 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 624 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 625 struct hid_field *field, bool is_percentage) 626 { 627 return 0; 628 } 629 630 static void hidinput_cleanup_battery(struct hid_device *dev) 631 { 632 } 633 634 static void hidinput_update_battery(struct hid_device *dev, int value) 635 { 636 } 637 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 638 639 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 640 unsigned int type, unsigned int usage) 641 { 642 struct hid_collection *collection; 643 644 collection = &device->collection[field->usage->collection_index]; 645 646 return collection->type == type && collection->usage == usage; 647 } 648 649 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 650 struct hid_usage *usage, unsigned int usage_index) 651 { 652 struct input_dev *input = hidinput->input; 653 struct hid_device *device = input_get_drvdata(input); 654 const struct usage_priority *usage_priority = NULL; 655 int max = 0, code; 656 unsigned int i = 0; 657 unsigned long *bit = NULL; 658 659 field->hidinput = hidinput; 660 661 if (field->flags & HID_MAIN_ITEM_CONSTANT) 662 goto ignore; 663 664 /* Ignore if report count is out of bounds. */ 665 if (field->report_count < 1) 666 goto ignore; 667 668 /* only LED usages are supported in output fields */ 669 if (field->report_type == HID_OUTPUT_REPORT && 670 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 671 goto ignore; 672 } 673 674 /* assign a priority based on the static list declared here */ 675 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 676 if (usage->hid == hidinput_usages_priorities[i].usage) { 677 usage_priority = &hidinput_usages_priorities[i]; 678 679 field->usages_priorities[usage_index] = 680 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 681 break; 682 } 683 } 684 685 /* 686 * For slotted devices, we need to also add the slot index 687 * in the priority. 688 */ 689 if (usage_priority && usage_priority->global) 690 field->usages_priorities[usage_index] |= 691 usage_priority->slot_overwrite; 692 else 693 field->usages_priorities[usage_index] |= 694 (0xff - field->slot_idx) << 16; 695 696 if (device->driver->input_mapping) { 697 int ret = device->driver->input_mapping(device, hidinput, field, 698 usage, &bit, &max); 699 if (ret > 0) 700 goto mapped; 701 if (ret < 0) 702 goto ignore; 703 } 704 705 switch (usage->hid & HID_USAGE_PAGE) { 706 case HID_UP_UNDEFINED: 707 goto ignore; 708 709 case HID_UP_KEYBOARD: 710 set_bit(EV_REP, input->evbit); 711 712 if ((usage->hid & HID_USAGE) < 256) { 713 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 714 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 715 } else 716 map_key(KEY_UNKNOWN); 717 718 break; 719 720 case HID_UP_BUTTON: 721 code = ((usage->hid - 1) & HID_USAGE); 722 723 switch (field->application) { 724 case HID_GD_MOUSE: 725 case HID_GD_POINTER: code += BTN_MOUSE; break; 726 case HID_GD_JOYSTICK: 727 if (code <= 0xf) 728 code += BTN_JOYSTICK; 729 else 730 code += BTN_TRIGGER_HAPPY - 0x10; 731 break; 732 case HID_GD_GAMEPAD: 733 if (code <= 0xf) 734 code += BTN_GAMEPAD; 735 else 736 code += BTN_TRIGGER_HAPPY - 0x10; 737 break; 738 case HID_CP_CONSUMER_CONTROL: 739 if (hidinput_field_in_collection(device, field, 740 HID_COLLECTION_NAMED_ARRAY, 741 HID_CP_PROGRAMMABLEBUTTONS)) { 742 if (code <= 0x1d) 743 code += KEY_MACRO1; 744 else 745 code += BTN_TRIGGER_HAPPY - 0x1e; 746 break; 747 } 748 fallthrough; 749 default: 750 switch (field->physical) { 751 case HID_GD_MOUSE: 752 case HID_GD_POINTER: code += BTN_MOUSE; break; 753 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 754 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 755 default: code += BTN_MISC; 756 } 757 } 758 759 map_key(code); 760 break; 761 762 case HID_UP_SIMULATION: 763 switch (usage->hid & 0xffff) { 764 case 0xba: map_abs(ABS_RUDDER); break; 765 case 0xbb: map_abs(ABS_THROTTLE); break; 766 case 0xc4: map_abs(ABS_GAS); break; 767 case 0xc5: map_abs(ABS_BRAKE); break; 768 case 0xc8: map_abs(ABS_WHEEL); break; 769 default: goto ignore; 770 } 771 break; 772 773 case HID_UP_GENDESK: 774 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 775 switch (usage->hid & 0xf) { 776 case 0x1: map_key_clear(KEY_POWER); break; 777 case 0x2: map_key_clear(KEY_SLEEP); break; 778 case 0x3: map_key_clear(KEY_WAKEUP); break; 779 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 780 case 0x5: map_key_clear(KEY_MENU); break; 781 case 0x6: map_key_clear(KEY_PROG1); break; 782 case 0x7: map_key_clear(KEY_HELP); break; 783 case 0x8: map_key_clear(KEY_EXIT); break; 784 case 0x9: map_key_clear(KEY_SELECT); break; 785 case 0xa: map_key_clear(KEY_RIGHT); break; 786 case 0xb: map_key_clear(KEY_LEFT); break; 787 case 0xc: map_key_clear(KEY_UP); break; 788 case 0xd: map_key_clear(KEY_DOWN); break; 789 case 0xe: map_key_clear(KEY_POWER2); break; 790 case 0xf: map_key_clear(KEY_RESTART); break; 791 default: goto unknown; 792 } 793 break; 794 } 795 796 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 797 switch (usage->hid & 0xf) { 798 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 799 default: goto ignore; 800 } 801 break; 802 } 803 804 /* 805 * Some lazy vendors declare 255 usages for System Control, 806 * leading to the creation of ABS_X|Y axis and too many others. 807 * It wouldn't be a problem if joydev doesn't consider the 808 * device as a joystick then. 809 */ 810 if (field->application == HID_GD_SYSTEM_CONTROL) 811 goto ignore; 812 813 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 814 switch (usage->hid) { 815 case HID_GD_UP: usage->hat_dir = 1; break; 816 case HID_GD_DOWN: usage->hat_dir = 5; break; 817 case HID_GD_RIGHT: usage->hat_dir = 3; break; 818 case HID_GD_LEFT: usage->hat_dir = 7; break; 819 default: goto unknown; 820 } 821 if (field->dpad) { 822 map_abs(field->dpad); 823 goto ignore; 824 } 825 map_abs(ABS_HAT0X); 826 break; 827 } 828 829 switch (usage->hid) { 830 /* These usage IDs map directly to the usage codes. */ 831 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 832 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 833 if (field->flags & HID_MAIN_ITEM_RELATIVE) 834 map_rel(usage->hid & 0xf); 835 else 836 map_abs_clear(usage->hid & 0xf); 837 break; 838 839 case HID_GD_WHEEL: 840 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 841 set_bit(REL_WHEEL, input->relbit); 842 map_rel(REL_WHEEL_HI_RES); 843 } else { 844 map_abs(usage->hid & 0xf); 845 } 846 break; 847 case HID_GD_SLIDER: case HID_GD_DIAL: 848 if (field->flags & HID_MAIN_ITEM_RELATIVE) 849 map_rel(usage->hid & 0xf); 850 else 851 map_abs(usage->hid & 0xf); 852 break; 853 854 case HID_GD_HATSWITCH: 855 usage->hat_min = field->logical_minimum; 856 usage->hat_max = field->logical_maximum; 857 map_abs(ABS_HAT0X); 858 break; 859 860 case HID_GD_START: map_key_clear(BTN_START); break; 861 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 862 863 case HID_GD_RFKILL_BTN: 864 /* MS wireless radio ctl extension, also check CA */ 865 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 866 map_key_clear(KEY_RFKILL); 867 /* We need to simulate the btn release */ 868 field->flags |= HID_MAIN_ITEM_RELATIVE; 869 break; 870 } 871 goto unknown; 872 873 default: goto unknown; 874 } 875 876 break; 877 878 case HID_UP_LED: 879 switch (usage->hid & 0xffff) { /* HID-Value: */ 880 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 881 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 882 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 883 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 884 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 885 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 886 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 887 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 888 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 889 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 890 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 891 892 default: goto ignore; 893 } 894 break; 895 896 case HID_UP_DIGITIZER: 897 if ((field->application & 0xff) == 0x01) /* Digitizer */ 898 __set_bit(INPUT_PROP_POINTER, input->propbit); 899 else if ((field->application & 0xff) == 0x02) /* Pen */ 900 __set_bit(INPUT_PROP_DIRECT, input->propbit); 901 902 switch (usage->hid & 0xff) { 903 case 0x00: /* Undefined */ 904 goto ignore; 905 906 case 0x30: /* TipPressure */ 907 if (!test_bit(BTN_TOUCH, input->keybit)) { 908 device->quirks |= HID_QUIRK_NOTOUCH; 909 set_bit(EV_KEY, input->evbit); 910 set_bit(BTN_TOUCH, input->keybit); 911 } 912 map_abs_clear(ABS_PRESSURE); 913 break; 914 915 case 0x32: /* InRange */ 916 switch (field->physical) { 917 case HID_DG_PUCK: 918 map_key(BTN_TOOL_MOUSE); 919 break; 920 case HID_DG_FINGER: 921 map_key(BTN_TOOL_FINGER); 922 break; 923 default: 924 /* 925 * If the physical is not given, 926 * rely on the application. 927 */ 928 if (!field->physical) { 929 switch (field->application) { 930 case HID_DG_TOUCHSCREEN: 931 case HID_DG_TOUCHPAD: 932 map_key_clear(BTN_TOOL_FINGER); 933 break; 934 default: 935 map_key_clear(BTN_TOOL_PEN); 936 } 937 } else { 938 map_key(BTN_TOOL_PEN); 939 } 940 break; 941 } 942 break; 943 944 case 0x3b: /* Battery Strength */ 945 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 946 usage->type = EV_PWR; 947 return; 948 949 case 0x3c: /* Invert */ 950 map_key_clear(BTN_TOOL_RUBBER); 951 break; 952 953 case 0x3d: /* X Tilt */ 954 map_abs_clear(ABS_TILT_X); 955 break; 956 957 case 0x3e: /* Y Tilt */ 958 map_abs_clear(ABS_TILT_Y); 959 break; 960 961 case 0x33: /* Touch */ 962 case 0x42: /* TipSwitch */ 963 case 0x43: /* TipSwitch2 */ 964 device->quirks &= ~HID_QUIRK_NOTOUCH; 965 map_key_clear(BTN_TOUCH); 966 break; 967 968 case 0x44: /* BarrelSwitch */ 969 map_key_clear(BTN_STYLUS); 970 break; 971 972 case 0x45: /* ERASER */ 973 /* 974 * This event is reported when eraser tip touches the surface. 975 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 976 * tool gets in proximity. 977 */ 978 map_key_clear(BTN_TOUCH); 979 break; 980 981 case 0x46: /* TabletPick */ 982 case 0x5a: /* SecondaryBarrelSwitch */ 983 map_key_clear(BTN_STYLUS2); 984 break; 985 986 case 0x5b: /* TransducerSerialNumber */ 987 case 0x6e: /* TransducerSerialNumber2 */ 988 map_msc(MSC_SERIAL); 989 break; 990 991 default: goto unknown; 992 } 993 break; 994 995 case HID_UP_TELEPHONY: 996 switch (usage->hid & HID_USAGE) { 997 case 0x2f: map_key_clear(KEY_MICMUTE); break; 998 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 999 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 1000 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 1001 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 1002 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 1003 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 1004 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 1005 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1006 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1007 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1008 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1009 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1010 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1011 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1012 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1013 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1014 default: goto ignore; 1015 } 1016 break; 1017 1018 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1019 switch (usage->hid & HID_USAGE) { 1020 case 0x000: goto ignore; 1021 case 0x030: map_key_clear(KEY_POWER); break; 1022 case 0x031: map_key_clear(KEY_RESTART); break; 1023 case 0x032: map_key_clear(KEY_SLEEP); break; 1024 case 0x034: map_key_clear(KEY_SLEEP); break; 1025 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1026 case 0x036: map_key_clear(BTN_MISC); break; 1027 1028 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1029 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1030 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1031 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1032 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1033 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1034 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1035 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1036 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1037 1038 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1039 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1040 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1041 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1042 case 0x069: map_key_clear(KEY_RED); break; 1043 case 0x06a: map_key_clear(KEY_GREEN); break; 1044 case 0x06b: map_key_clear(KEY_BLUE); break; 1045 case 0x06c: map_key_clear(KEY_YELLOW); break; 1046 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1047 1048 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1049 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1050 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1051 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1052 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1053 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1054 1055 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1056 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1057 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1058 1059 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1060 case 0x083: map_key_clear(KEY_LAST); break; 1061 case 0x084: map_key_clear(KEY_ENTER); break; 1062 case 0x088: map_key_clear(KEY_PC); break; 1063 case 0x089: map_key_clear(KEY_TV); break; 1064 case 0x08a: map_key_clear(KEY_WWW); break; 1065 case 0x08b: map_key_clear(KEY_DVD); break; 1066 case 0x08c: map_key_clear(KEY_PHONE); break; 1067 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1068 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1069 case 0x08f: map_key_clear(KEY_GAMES); break; 1070 case 0x090: map_key_clear(KEY_MEMO); break; 1071 case 0x091: map_key_clear(KEY_CD); break; 1072 case 0x092: map_key_clear(KEY_VCR); break; 1073 case 0x093: map_key_clear(KEY_TUNER); break; 1074 case 0x094: map_key_clear(KEY_EXIT); break; 1075 case 0x095: map_key_clear(KEY_HELP); break; 1076 case 0x096: map_key_clear(KEY_TAPE); break; 1077 case 0x097: map_key_clear(KEY_TV2); break; 1078 case 0x098: map_key_clear(KEY_SAT); break; 1079 case 0x09a: map_key_clear(KEY_PVR); break; 1080 1081 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1082 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1083 case 0x0a0: map_key_clear(KEY_VCR2); break; 1084 1085 case 0x0b0: map_key_clear(KEY_PLAY); break; 1086 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1087 case 0x0b2: map_key_clear(KEY_RECORD); break; 1088 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1089 case 0x0b4: map_key_clear(KEY_REWIND); break; 1090 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1091 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1092 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1093 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1094 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1095 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1096 case 0x0bf: map_key_clear(KEY_SLOW); break; 1097 1098 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1099 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1100 1101 case 0x0d5: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1102 case 0x0d6: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1103 case 0x0d7: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1104 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1105 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1106 1107 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1108 case 0x0e2: map_key_clear(KEY_MUTE); break; 1109 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1110 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1111 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1112 case 0x0f5: map_key_clear(KEY_SLOW); break; 1113 1114 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1115 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1116 case 0x183: map_key_clear(KEY_CONFIG); break; 1117 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1118 case 0x185: map_key_clear(KEY_EDITOR); break; 1119 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1120 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1121 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1122 case 0x189: map_key_clear(KEY_DATABASE); break; 1123 case 0x18a: map_key_clear(KEY_MAIL); break; 1124 case 0x18b: map_key_clear(KEY_NEWS); break; 1125 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1126 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1127 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1128 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1129 case 0x190: map_key_clear(KEY_JOURNAL); break; 1130 case 0x191: map_key_clear(KEY_FINANCE); break; 1131 case 0x192: map_key_clear(KEY_CALC); break; 1132 case 0x193: map_key_clear(KEY_PLAYER); break; 1133 case 0x194: map_key_clear(KEY_FILE); break; 1134 case 0x196: map_key_clear(KEY_WWW); break; 1135 case 0x199: map_key_clear(KEY_CHAT); break; 1136 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1137 case 0x19e: map_key_clear(KEY_COFFEE); break; 1138 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1139 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1140 case 0x1a3: map_key_clear(KEY_NEXT); break; 1141 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1142 case 0x1a6: map_key_clear(KEY_HELP); break; 1143 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1144 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1145 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1146 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1147 case 0x1b4: map_key_clear(KEY_FILE); break; 1148 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1149 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1150 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1151 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1152 case 0x1bd: map_key_clear(KEY_INFO); break; 1153 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1154 case 0x201: map_key_clear(KEY_NEW); break; 1155 case 0x202: map_key_clear(KEY_OPEN); break; 1156 case 0x203: map_key_clear(KEY_CLOSE); break; 1157 case 0x204: map_key_clear(KEY_EXIT); break; 1158 case 0x207: map_key_clear(KEY_SAVE); break; 1159 case 0x208: map_key_clear(KEY_PRINT); break; 1160 case 0x209: map_key_clear(KEY_PROPS); break; 1161 case 0x21a: map_key_clear(KEY_UNDO); break; 1162 case 0x21b: map_key_clear(KEY_COPY); break; 1163 case 0x21c: map_key_clear(KEY_CUT); break; 1164 case 0x21d: map_key_clear(KEY_PASTE); break; 1165 case 0x21f: map_key_clear(KEY_FIND); break; 1166 case 0x221: map_key_clear(KEY_SEARCH); break; 1167 case 0x222: map_key_clear(KEY_GOTO); break; 1168 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1169 case 0x224: map_key_clear(KEY_BACK); break; 1170 case 0x225: map_key_clear(KEY_FORWARD); break; 1171 case 0x226: map_key_clear(KEY_STOP); break; 1172 case 0x227: map_key_clear(KEY_REFRESH); break; 1173 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1174 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1175 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1176 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1177 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1178 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1179 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1180 case 0x238: /* AC Pan */ 1181 set_bit(REL_HWHEEL, input->relbit); 1182 map_rel(REL_HWHEEL_HI_RES); 1183 break; 1184 case 0x23d: map_key_clear(KEY_EDIT); break; 1185 case 0x25f: map_key_clear(KEY_CANCEL); break; 1186 case 0x269: map_key_clear(KEY_INSERT); break; 1187 case 0x26a: map_key_clear(KEY_DELETE); break; 1188 case 0x279: map_key_clear(KEY_REDO); break; 1189 1190 case 0x289: map_key_clear(KEY_REPLY); break; 1191 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1192 case 0x28c: map_key_clear(KEY_SEND); break; 1193 1194 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1195 1196 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1197 1198 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1199 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1200 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1201 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1202 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1203 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1204 1205 case 0x29f: map_key_clear(KEY_SCALE); break; 1206 1207 default: map_key_clear(KEY_UNKNOWN); 1208 } 1209 break; 1210 1211 case HID_UP_GENDEVCTRLS: 1212 switch (usage->hid) { 1213 case HID_DC_BATTERYSTRENGTH: 1214 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1215 usage->type = EV_PWR; 1216 return; 1217 } 1218 goto unknown; 1219 1220 case HID_UP_BATTERY: 1221 switch (usage->hid) { 1222 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1223 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1224 usage->type = EV_PWR; 1225 return; 1226 } 1227 goto unknown; 1228 1229 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1230 set_bit(EV_REP, input->evbit); 1231 switch (usage->hid & HID_USAGE) { 1232 case 0x021: map_key_clear(KEY_PRINT); break; 1233 case 0x070: map_key_clear(KEY_HP); break; 1234 case 0x071: map_key_clear(KEY_CAMERA); break; 1235 case 0x072: map_key_clear(KEY_SOUND); break; 1236 case 0x073: map_key_clear(KEY_QUESTION); break; 1237 case 0x080: map_key_clear(KEY_EMAIL); break; 1238 case 0x081: map_key_clear(KEY_CHAT); break; 1239 case 0x082: map_key_clear(KEY_SEARCH); break; 1240 case 0x083: map_key_clear(KEY_CONNECT); break; 1241 case 0x084: map_key_clear(KEY_FINANCE); break; 1242 case 0x085: map_key_clear(KEY_SPORT); break; 1243 case 0x086: map_key_clear(KEY_SHOP); break; 1244 default: goto ignore; 1245 } 1246 break; 1247 1248 case HID_UP_HPVENDOR2: 1249 set_bit(EV_REP, input->evbit); 1250 switch (usage->hid & HID_USAGE) { 1251 case 0x001: map_key_clear(KEY_MICMUTE); break; 1252 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1253 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1254 default: goto ignore; 1255 } 1256 break; 1257 1258 case HID_UP_MSVENDOR: 1259 goto ignore; 1260 1261 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1262 set_bit(EV_REP, input->evbit); 1263 goto ignore; 1264 1265 case HID_UP_LOGIVENDOR: 1266 /* intentional fallback */ 1267 case HID_UP_LOGIVENDOR2: 1268 /* intentional fallback */ 1269 case HID_UP_LOGIVENDOR3: 1270 goto ignore; 1271 1272 case HID_UP_PID: 1273 switch (usage->hid & HID_USAGE) { 1274 case 0xa4: map_key_clear(BTN_DEAD); break; 1275 default: goto ignore; 1276 } 1277 break; 1278 1279 default: 1280 unknown: 1281 if (field->report_size == 1) { 1282 if (field->report->type == HID_OUTPUT_REPORT) { 1283 map_led(LED_MISC); 1284 break; 1285 } 1286 map_key(BTN_MISC); 1287 break; 1288 } 1289 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1290 map_rel(REL_MISC); 1291 break; 1292 } 1293 map_abs(ABS_MISC); 1294 break; 1295 } 1296 1297 mapped: 1298 /* Mapping failed, bail out */ 1299 if (!bit) 1300 return; 1301 1302 if (device->driver->input_mapped && 1303 device->driver->input_mapped(device, hidinput, field, usage, 1304 &bit, &max) < 0) { 1305 /* 1306 * The driver indicated that no further generic handling 1307 * of the usage is desired. 1308 */ 1309 return; 1310 } 1311 1312 set_bit(usage->type, input->evbit); 1313 1314 /* 1315 * This part is *really* controversial: 1316 * - HID aims at being generic so we should do our best to export 1317 * all incoming events 1318 * - HID describes what events are, so there is no reason for ABS_X 1319 * to be mapped to ABS_Y 1320 * - HID is using *_MISC+N as a default value, but nothing prevents 1321 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1322 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1323 * processing) 1324 * 1325 * If devices still want to use this (at their own risk), they will 1326 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1327 * the default should be a reliable mapping. 1328 */ 1329 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1330 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1331 usage->code = find_next_zero_bit(bit, 1332 max + 1, 1333 usage->code); 1334 } else { 1335 device->status |= HID_STAT_DUP_DETECTED; 1336 goto ignore; 1337 } 1338 } 1339 1340 if (usage->code > max) 1341 goto ignore; 1342 1343 if (usage->type == EV_ABS) { 1344 1345 int a = field->logical_minimum; 1346 int b = field->logical_maximum; 1347 1348 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1349 a = field->logical_minimum = 0; 1350 b = field->logical_maximum = 255; 1351 } 1352 1353 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1354 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1355 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1356 1357 input_abs_set_res(input, usage->code, 1358 hidinput_calc_abs_res(field, usage->code)); 1359 1360 /* use a larger default input buffer for MT devices */ 1361 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1362 input_set_events_per_packet(input, 60); 1363 } 1364 1365 if (usage->type == EV_ABS && 1366 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1367 int i; 1368 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1369 input_set_abs_params(input, i, -1, 1, 0, 0); 1370 set_bit(i, input->absbit); 1371 } 1372 if (usage->hat_dir && !field->dpad) 1373 field->dpad = usage->code; 1374 } 1375 1376 /* for those devices which produce Consumer volume usage as relative, 1377 * we emulate pressing volumeup/volumedown appropriate number of times 1378 * in hidinput_hid_event() 1379 */ 1380 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1381 (usage->code == ABS_VOLUME)) { 1382 set_bit(KEY_VOLUMEUP, input->keybit); 1383 set_bit(KEY_VOLUMEDOWN, input->keybit); 1384 } 1385 1386 if (usage->type == EV_KEY) { 1387 set_bit(EV_MSC, input->evbit); 1388 set_bit(MSC_SCAN, input->mscbit); 1389 } 1390 1391 return; 1392 1393 ignore: 1394 usage->type = 0; 1395 usage->code = 0; 1396 } 1397 1398 static void hidinput_handle_scroll(struct hid_usage *usage, 1399 struct input_dev *input, 1400 __s32 value) 1401 { 1402 int code; 1403 int hi_res, lo_res; 1404 1405 if (value == 0) 1406 return; 1407 1408 if (usage->code == REL_WHEEL_HI_RES) 1409 code = REL_WHEEL; 1410 else 1411 code = REL_HWHEEL; 1412 1413 /* 1414 * Windows reports one wheel click as value 120. Where a high-res 1415 * scroll wheel is present, a fraction of 120 is reported instead. 1416 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1417 * adhere to the 120 expectation. 1418 */ 1419 hi_res = value * 120/usage->resolution_multiplier; 1420 1421 usage->wheel_accumulated += hi_res; 1422 lo_res = usage->wheel_accumulated/120; 1423 if (lo_res) 1424 usage->wheel_accumulated -= lo_res * 120; 1425 1426 input_event(input, EV_REL, code, lo_res); 1427 input_event(input, EV_REL, usage->code, hi_res); 1428 } 1429 1430 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1431 unsigned int tool) 1432 { 1433 /* if the given tool is not currently reported, ignore */ 1434 if (!test_bit(tool, input->key)) 1435 return; 1436 1437 /* 1438 * if the given tool was previously set, release it, 1439 * release any TOUCH and send an EV_SYN 1440 */ 1441 input_event(input, EV_KEY, BTN_TOUCH, 0); 1442 input_event(input, EV_KEY, tool, 0); 1443 input_event(input, EV_SYN, SYN_REPORT, 0); 1444 1445 report->tool = 0; 1446 } 1447 1448 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1449 unsigned int new_tool) 1450 { 1451 if (report->tool != new_tool) 1452 hid_report_release_tool(report, input, report->tool); 1453 1454 input_event(input, EV_KEY, new_tool, 1); 1455 report->tool = new_tool; 1456 } 1457 1458 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1459 { 1460 struct input_dev *input; 1461 struct hid_report *report = field->report; 1462 unsigned *quirks = &hid->quirks; 1463 1464 if (!usage->type) 1465 return; 1466 1467 if (usage->type == EV_PWR) { 1468 hidinput_update_battery(hid, value); 1469 return; 1470 } 1471 1472 if (!field->hidinput) 1473 return; 1474 1475 input = field->hidinput->input; 1476 1477 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1478 int hat_dir = usage->hat_dir; 1479 if (!hat_dir) 1480 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1481 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1482 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1483 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1484 return; 1485 } 1486 1487 /* 1488 * Ignore out-of-range values as per HID specification, 1489 * section 5.10 and 6.2.25, when NULL state bit is present. 1490 * When it's not, clamp the value to match Microsoft's input 1491 * driver as mentioned in "Required HID usages for digitizers": 1492 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1493 * 1494 * The logical_minimum < logical_maximum check is done so that we 1495 * don't unintentionally discard values sent by devices which 1496 * don't specify logical min and max. 1497 */ 1498 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1499 field->logical_minimum < field->logical_maximum) { 1500 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1501 (value < field->logical_minimum || 1502 value > field->logical_maximum)) { 1503 dbg_hid("Ignoring out-of-range value %x\n", value); 1504 return; 1505 } 1506 value = clamp(value, 1507 field->logical_minimum, 1508 field->logical_maximum); 1509 } 1510 1511 switch (usage->hid) { 1512 case HID_DG_ERASER: 1513 report->tool_active |= !!value; 1514 1515 /* 1516 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1517 * to accommodate for devices not following the spec. 1518 */ 1519 if (value) 1520 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1521 else if (report->tool != BTN_TOOL_RUBBER) 1522 /* value is off, tool is not rubber, ignore */ 1523 return; 1524 1525 /* let hid-input set BTN_TOUCH */ 1526 break; 1527 1528 case HID_DG_INVERT: 1529 report->tool_active |= !!value; 1530 1531 /* 1532 * If invert is set, we store BTN_TOOL_RUBBER. 1533 */ 1534 if (value) 1535 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1536 else if (!report->tool_active) 1537 /* tool_active not set means Invert and Eraser are not set */ 1538 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1539 1540 /* no further processing */ 1541 return; 1542 1543 case HID_DG_INRANGE: 1544 report->tool_active |= !!value; 1545 1546 if (report->tool_active) { 1547 /* 1548 * if tool is not set but is marked as active, 1549 * assume ours 1550 */ 1551 if (!report->tool) 1552 report->tool = usage->code; 1553 1554 /* drivers may have changed the value behind our back, resend it */ 1555 hid_report_set_tool(report, input, report->tool); 1556 } else { 1557 hid_report_release_tool(report, input, usage->code); 1558 } 1559 1560 /* reset tool_active for the next event */ 1561 report->tool_active = false; 1562 1563 /* no further processing */ 1564 return; 1565 1566 case HID_DG_TIPSWITCH: 1567 report->tool_active |= !!value; 1568 1569 /* if tool is set to RUBBER we should ignore the current value */ 1570 if (report->tool == BTN_TOOL_RUBBER) 1571 return; 1572 1573 break; 1574 1575 case HID_DG_TIPPRESSURE: 1576 if (*quirks & HID_QUIRK_NOTOUCH) { 1577 int a = field->logical_minimum; 1578 int b = field->logical_maximum; 1579 1580 if (value > a + ((b - a) >> 3)) { 1581 input_event(input, EV_KEY, BTN_TOUCH, 1); 1582 report->tool_active = true; 1583 } 1584 } 1585 break; 1586 1587 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1588 dbg_hid("Maximum Effects - %d\n",value); 1589 return; 1590 1591 case HID_UP_PID | 0x7fUL: 1592 dbg_hid("PID Pool Report\n"); 1593 return; 1594 } 1595 1596 switch (usage->type) { 1597 case EV_KEY: 1598 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1599 return; 1600 break; 1601 1602 case EV_REL: 1603 if (usage->code == REL_WHEEL_HI_RES || 1604 usage->code == REL_HWHEEL_HI_RES) { 1605 hidinput_handle_scroll(usage, input, value); 1606 return; 1607 } 1608 break; 1609 1610 case EV_ABS: 1611 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1612 usage->code == ABS_VOLUME) { 1613 int count = abs(value); 1614 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1615 int i; 1616 1617 for (i = 0; i < count; i++) { 1618 input_event(input, EV_KEY, direction, 1); 1619 input_sync(input); 1620 input_event(input, EV_KEY, direction, 0); 1621 input_sync(input); 1622 } 1623 return; 1624 1625 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1626 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1627 value = field->logical_maximum - value; 1628 break; 1629 } 1630 1631 /* 1632 * Ignore reports for absolute data if the data didn't change. This is 1633 * not only an optimization but also fixes 'dead' key reports. Some 1634 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1635 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1636 * can only have one of them physically available. The 'dead' keys 1637 * report constant 0. As all map to the same keycode, they'd confuse 1638 * the input layer. If we filter the 'dead' keys on the HID level, we 1639 * skip the keycode translation and only forward real events. 1640 */ 1641 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1642 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1643 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1644 usage->usage_index < field->maxusage && 1645 value == field->value[usage->usage_index]) 1646 return; 1647 1648 /* report the usage code as scancode if the key status has changed */ 1649 if (usage->type == EV_KEY && 1650 (!test_bit(usage->code, input->key)) == value) 1651 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1652 1653 input_event(input, usage->type, usage->code, value); 1654 1655 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1656 usage->type == EV_KEY && value) { 1657 input_sync(input); 1658 input_event(input, usage->type, usage->code, 0); 1659 } 1660 } 1661 1662 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1663 { 1664 struct hid_input *hidinput; 1665 1666 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1667 return; 1668 1669 list_for_each_entry(hidinput, &hid->inputs, list) 1670 input_sync(hidinput->input); 1671 } 1672 EXPORT_SYMBOL_GPL(hidinput_report_event); 1673 1674 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1675 unsigned int code, struct hid_field **field) 1676 { 1677 struct hid_report *report; 1678 int i, j; 1679 1680 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1681 for (i = 0; i < report->maxfield; i++) { 1682 *field = report->field[i]; 1683 for (j = 0; j < (*field)->maxusage; j++) 1684 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1685 return j; 1686 } 1687 } 1688 return -1; 1689 } 1690 1691 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1692 { 1693 struct hid_report *report; 1694 struct hid_field *field; 1695 int i, j; 1696 1697 list_for_each_entry(report, 1698 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1699 list) { 1700 for (i = 0; i < report->maxfield; i++) { 1701 field = report->field[i]; 1702 for (j = 0; j < field->maxusage; j++) 1703 if (field->usage[j].type == EV_LED) 1704 return field; 1705 } 1706 } 1707 return NULL; 1708 } 1709 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1710 1711 unsigned int hidinput_count_leds(struct hid_device *hid) 1712 { 1713 struct hid_report *report; 1714 struct hid_field *field; 1715 int i, j; 1716 unsigned int count = 0; 1717 1718 list_for_each_entry(report, 1719 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1720 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 == EV_LED && 1725 field->value[j]) 1726 count += 1; 1727 } 1728 } 1729 return count; 1730 } 1731 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1732 1733 static void hidinput_led_worker(struct work_struct *work) 1734 { 1735 struct hid_device *hid = container_of(work, struct hid_device, 1736 led_work); 1737 struct hid_field *field; 1738 struct hid_report *report; 1739 int ret; 1740 u32 len; 1741 __u8 *buf; 1742 1743 field = hidinput_get_led_field(hid); 1744 if (!field) 1745 return; 1746 1747 /* 1748 * field->report is accessed unlocked regarding HID core. So there might 1749 * be another incoming SET-LED request from user-space, which changes 1750 * the LED state while we assemble our outgoing buffer. However, this 1751 * doesn't matter as hid_output_report() correctly converts it into a 1752 * boolean value no matter what information is currently set on the LED 1753 * field (even garbage). So the remote device will always get a valid 1754 * request. 1755 * And in case we send a wrong value, a next led worker is spawned 1756 * for every SET-LED request so the following worker will send the 1757 * correct value, guaranteed! 1758 */ 1759 1760 report = field->report; 1761 1762 /* use custom SET_REPORT request if possible (asynchronous) */ 1763 if (hid->ll_driver->request) 1764 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1765 1766 /* fall back to generic raw-output-report */ 1767 len = hid_report_len(report); 1768 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1769 if (!buf) 1770 return; 1771 1772 hid_output_report(report, buf); 1773 /* synchronous output report */ 1774 ret = hid_hw_output_report(hid, buf, len); 1775 if (ret == -ENOSYS) 1776 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1777 HID_REQ_SET_REPORT); 1778 kfree(buf); 1779 } 1780 1781 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1782 unsigned int code, int value) 1783 { 1784 struct hid_device *hid = input_get_drvdata(dev); 1785 struct hid_field *field; 1786 int offset; 1787 1788 if (type == EV_FF) 1789 return input_ff_event(dev, type, code, value); 1790 1791 if (type != EV_LED) 1792 return -1; 1793 1794 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1795 hid_warn(dev, "event field not found\n"); 1796 return -1; 1797 } 1798 1799 hid_set_field(field, offset, value); 1800 1801 schedule_work(&hid->led_work); 1802 return 0; 1803 } 1804 1805 static int hidinput_open(struct input_dev *dev) 1806 { 1807 struct hid_device *hid = input_get_drvdata(dev); 1808 1809 return hid_hw_open(hid); 1810 } 1811 1812 static void hidinput_close(struct input_dev *dev) 1813 { 1814 struct hid_device *hid = input_get_drvdata(dev); 1815 1816 hid_hw_close(hid); 1817 } 1818 1819 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1820 struct hid_report *report, bool use_logical_max) 1821 { 1822 struct hid_usage *usage; 1823 bool update_needed = false; 1824 bool get_report_completed = false; 1825 int i, j; 1826 1827 if (report->maxfield == 0) 1828 return false; 1829 1830 for (i = 0; i < report->maxfield; i++) { 1831 __s32 value = use_logical_max ? 1832 report->field[i]->logical_maximum : 1833 report->field[i]->logical_minimum; 1834 1835 /* There is no good reason for a Resolution 1836 * Multiplier to have a count other than 1. 1837 * Ignore that case. 1838 */ 1839 if (report->field[i]->report_count != 1) 1840 continue; 1841 1842 for (j = 0; j < report->field[i]->maxusage; j++) { 1843 usage = &report->field[i]->usage[j]; 1844 1845 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1846 continue; 1847 1848 /* 1849 * If we have more than one feature within this 1850 * report we need to fill in the bits from the 1851 * others before we can overwrite the ones for the 1852 * Resolution Multiplier. 1853 * 1854 * But if we're not allowed to read from the device, 1855 * we just bail. Such a device should not exist 1856 * anyway. 1857 */ 1858 if (!get_report_completed && report->maxfield > 1) { 1859 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1860 return update_needed; 1861 1862 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1863 hid_hw_wait(hid); 1864 get_report_completed = true; 1865 } 1866 1867 report->field[i]->value[j] = value; 1868 update_needed = true; 1869 } 1870 } 1871 1872 return update_needed; 1873 } 1874 1875 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1876 { 1877 struct hid_report_enum *rep_enum; 1878 struct hid_report *rep; 1879 int ret; 1880 1881 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1882 list_for_each_entry(rep, &rep_enum->report_list, list) { 1883 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1884 rep, true); 1885 1886 if (update_needed) { 1887 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1888 if (ret) { 1889 __hidinput_change_resolution_multipliers(hid, 1890 rep, false); 1891 return; 1892 } 1893 } 1894 } 1895 1896 /* refresh our structs */ 1897 hid_setup_resolution_multiplier(hid); 1898 } 1899 1900 static void report_features(struct hid_device *hid) 1901 { 1902 struct hid_driver *drv = hid->driver; 1903 struct hid_report_enum *rep_enum; 1904 struct hid_report *rep; 1905 struct hid_usage *usage; 1906 int i, j; 1907 1908 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1909 list_for_each_entry(rep, &rep_enum->report_list, list) 1910 for (i = 0; i < rep->maxfield; i++) { 1911 /* Ignore if report count is out of bounds. */ 1912 if (rep->field[i]->report_count < 1) 1913 continue; 1914 1915 for (j = 0; j < rep->field[i]->maxusage; j++) { 1916 usage = &rep->field[i]->usage[j]; 1917 1918 /* Verify if Battery Strength feature is available */ 1919 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1920 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1921 rep->field[i], false); 1922 1923 if (drv->feature_mapping) 1924 drv->feature_mapping(hid, rep->field[i], usage); 1925 } 1926 } 1927 } 1928 1929 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1930 unsigned int application) 1931 { 1932 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1933 struct input_dev *input_dev = input_allocate_device(); 1934 const char *suffix = NULL; 1935 size_t suffix_len, name_len; 1936 1937 if (!hidinput || !input_dev) 1938 goto fail; 1939 1940 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1941 hid->maxapplication > 1) { 1942 switch (application) { 1943 case HID_GD_KEYBOARD: 1944 suffix = "Keyboard"; 1945 break; 1946 case HID_GD_KEYPAD: 1947 suffix = "Keypad"; 1948 break; 1949 case HID_GD_MOUSE: 1950 suffix = "Mouse"; 1951 break; 1952 case HID_DG_PEN: 1953 /* 1954 * yes, there is an issue here: 1955 * DG_PEN -> "Stylus" 1956 * DG_STYLUS -> "Pen" 1957 * But changing this now means users with config snippets 1958 * will have to change it and the test suite will not be happy. 1959 */ 1960 suffix = "Stylus"; 1961 break; 1962 case HID_DG_STYLUS: 1963 suffix = "Pen"; 1964 break; 1965 case HID_DG_TOUCHSCREEN: 1966 suffix = "Touchscreen"; 1967 break; 1968 case HID_DG_TOUCHPAD: 1969 suffix = "Touchpad"; 1970 break; 1971 case HID_GD_SYSTEM_CONTROL: 1972 suffix = "System Control"; 1973 break; 1974 case HID_CP_CONSUMER_CONTROL: 1975 suffix = "Consumer Control"; 1976 break; 1977 case HID_GD_WIRELESS_RADIO_CTLS: 1978 suffix = "Wireless Radio Control"; 1979 break; 1980 case HID_GD_SYSTEM_MULTIAXIS: 1981 suffix = "System Multi Axis"; 1982 break; 1983 default: 1984 break; 1985 } 1986 } 1987 1988 if (suffix) { 1989 name_len = strlen(hid->name); 1990 suffix_len = strlen(suffix); 1991 if ((name_len < suffix_len) || 1992 strcmp(hid->name + name_len - suffix_len, suffix)) { 1993 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1994 hid->name, suffix); 1995 if (!hidinput->name) 1996 goto fail; 1997 } 1998 } 1999 2000 input_set_drvdata(input_dev, hid); 2001 input_dev->event = hidinput_input_event; 2002 input_dev->open = hidinput_open; 2003 input_dev->close = hidinput_close; 2004 input_dev->setkeycode = hidinput_setkeycode; 2005 input_dev->getkeycode = hidinput_getkeycode; 2006 2007 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2008 input_dev->phys = hid->phys; 2009 input_dev->uniq = hid->uniq; 2010 input_dev->id.bustype = hid->bus; 2011 input_dev->id.vendor = hid->vendor; 2012 input_dev->id.product = hid->product; 2013 input_dev->id.version = hid->version; 2014 input_dev->dev.parent = &hid->dev; 2015 2016 hidinput->input = input_dev; 2017 hidinput->application = application; 2018 list_add_tail(&hidinput->list, &hid->inputs); 2019 2020 INIT_LIST_HEAD(&hidinput->reports); 2021 2022 return hidinput; 2023 2024 fail: 2025 kfree(hidinput); 2026 input_free_device(input_dev); 2027 hid_err(hid, "Out of memory during hid input probe\n"); 2028 return NULL; 2029 } 2030 2031 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2032 { 2033 int i; 2034 unsigned long r = 0; 2035 2036 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2037 r |= hidinput->input->evbit[i]; 2038 2039 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2040 r |= hidinput->input->keybit[i]; 2041 2042 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2043 r |= hidinput->input->relbit[i]; 2044 2045 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2046 r |= hidinput->input->absbit[i]; 2047 2048 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2049 r |= hidinput->input->mscbit[i]; 2050 2051 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2052 r |= hidinput->input->ledbit[i]; 2053 2054 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2055 r |= hidinput->input->sndbit[i]; 2056 2057 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2058 r |= hidinput->input->ffbit[i]; 2059 2060 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2061 r |= hidinput->input->swbit[i]; 2062 2063 return !!r; 2064 } 2065 2066 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2067 struct hid_input *hidinput) 2068 { 2069 struct hid_report *report; 2070 int i, k; 2071 2072 list_del(&hidinput->list); 2073 input_free_device(hidinput->input); 2074 kfree(hidinput->name); 2075 2076 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2077 if (k == HID_OUTPUT_REPORT && 2078 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2079 continue; 2080 2081 list_for_each_entry(report, &hid->report_enum[k].report_list, 2082 list) { 2083 2084 for (i = 0; i < report->maxfield; i++) 2085 if (report->field[i]->hidinput == hidinput) 2086 report->field[i]->hidinput = NULL; 2087 } 2088 } 2089 2090 kfree(hidinput); 2091 } 2092 2093 static struct hid_input *hidinput_match(struct hid_report *report) 2094 { 2095 struct hid_device *hid = report->device; 2096 struct hid_input *hidinput; 2097 2098 list_for_each_entry(hidinput, &hid->inputs, list) { 2099 if (hidinput->report && 2100 hidinput->report->id == report->id) 2101 return hidinput; 2102 } 2103 2104 return NULL; 2105 } 2106 2107 static struct hid_input *hidinput_match_application(struct hid_report *report) 2108 { 2109 struct hid_device *hid = report->device; 2110 struct hid_input *hidinput; 2111 2112 list_for_each_entry(hidinput, &hid->inputs, list) { 2113 if (hidinput->application == report->application) 2114 return hidinput; 2115 2116 /* 2117 * Keep SystemControl and ConsumerControl applications together 2118 * with the main keyboard, if present. 2119 */ 2120 if ((report->application == HID_GD_SYSTEM_CONTROL || 2121 report->application == HID_CP_CONSUMER_CONTROL) && 2122 hidinput->application == HID_GD_KEYBOARD) { 2123 return hidinput; 2124 } 2125 } 2126 2127 return NULL; 2128 } 2129 2130 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2131 struct hid_report *report) 2132 { 2133 int i, j, k; 2134 int first_field_index = 0; 2135 int slot_collection_index = -1; 2136 int prev_collection_index = -1; 2137 unsigned int slot_idx = 0; 2138 struct hid_field *field; 2139 2140 /* 2141 * First tag all the fields that are part of a slot, 2142 * a slot needs to have one Contact ID in the collection 2143 */ 2144 for (i = 0; i < report->maxfield; i++) { 2145 field = report->field[i]; 2146 2147 /* ignore fields without usage */ 2148 if (field->maxusage < 1) 2149 continue; 2150 2151 /* 2152 * janitoring when collection_index changes 2153 */ 2154 if (prev_collection_index != field->usage->collection_index) { 2155 prev_collection_index = field->usage->collection_index; 2156 first_field_index = i; 2157 } 2158 2159 /* 2160 * if we already found a Contact ID in the collection, 2161 * tag and continue to the next. 2162 */ 2163 if (slot_collection_index == field->usage->collection_index) { 2164 field->slot_idx = slot_idx; 2165 continue; 2166 } 2167 2168 /* check if the current field has Contact ID */ 2169 for (j = 0; j < field->maxusage; j++) { 2170 if (field->usage[j].hid == HID_DG_CONTACTID) { 2171 slot_collection_index = field->usage->collection_index; 2172 slot_idx++; 2173 2174 /* 2175 * mark all previous fields and this one in the 2176 * current collection to be slotted. 2177 */ 2178 for (k = first_field_index; k <= i; k++) 2179 report->field[k]->slot_idx = slot_idx; 2180 break; 2181 } 2182 } 2183 } 2184 2185 for (i = 0; i < report->maxfield; i++) 2186 for (j = 0; j < report->field[i]->maxusage; j++) 2187 hidinput_configure_usage(hidinput, report->field[i], 2188 report->field[i]->usage + j, 2189 j); 2190 } 2191 2192 /* 2193 * Register the input device; print a message. 2194 * Configure the input layer interface 2195 * Read all reports and initialize the absolute field values. 2196 */ 2197 2198 int hidinput_connect(struct hid_device *hid, unsigned int force) 2199 { 2200 struct hid_driver *drv = hid->driver; 2201 struct hid_report *report; 2202 struct hid_input *next, *hidinput = NULL; 2203 unsigned int application; 2204 int i, k; 2205 2206 INIT_LIST_HEAD(&hid->inputs); 2207 INIT_WORK(&hid->led_work, hidinput_led_worker); 2208 2209 hid->status &= ~HID_STAT_DUP_DETECTED; 2210 2211 if (!force) { 2212 for (i = 0; i < hid->maxcollection; i++) { 2213 struct hid_collection *col = &hid->collection[i]; 2214 if (col->type == HID_COLLECTION_APPLICATION || 2215 col->type == HID_COLLECTION_PHYSICAL) 2216 if (IS_INPUT_APPLICATION(col->usage)) 2217 break; 2218 } 2219 2220 if (i == hid->maxcollection) 2221 return -1; 2222 } 2223 2224 report_features(hid); 2225 2226 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2227 if (k == HID_OUTPUT_REPORT && 2228 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2229 continue; 2230 2231 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2232 2233 if (!report->maxfield) 2234 continue; 2235 2236 application = report->application; 2237 2238 /* 2239 * Find the previous hidinput report attached 2240 * to this report id. 2241 */ 2242 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2243 hidinput = hidinput_match(report); 2244 else if (hid->maxapplication > 1 && 2245 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2246 hidinput = hidinput_match_application(report); 2247 2248 if (!hidinput) { 2249 hidinput = hidinput_allocate(hid, application); 2250 if (!hidinput) 2251 goto out_unwind; 2252 } 2253 2254 hidinput_configure_usages(hidinput, report); 2255 2256 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2257 hidinput->report = report; 2258 2259 list_add_tail(&report->hidinput_list, 2260 &hidinput->reports); 2261 } 2262 } 2263 2264 hidinput_change_resolution_multipliers(hid); 2265 2266 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2267 if (drv->input_configured && 2268 drv->input_configured(hid, hidinput)) 2269 goto out_unwind; 2270 2271 if (!hidinput_has_been_populated(hidinput)) { 2272 /* no need to register an input device not populated */ 2273 hidinput_cleanup_hidinput(hid, hidinput); 2274 continue; 2275 } 2276 2277 if (input_register_device(hidinput->input)) 2278 goto out_unwind; 2279 hidinput->registered = true; 2280 } 2281 2282 if (list_empty(&hid->inputs)) { 2283 hid_err(hid, "No inputs registered, leaving\n"); 2284 goto out_unwind; 2285 } 2286 2287 if (hid->status & HID_STAT_DUP_DETECTED) 2288 hid_dbg(hid, 2289 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2290 2291 return 0; 2292 2293 out_unwind: 2294 /* unwind the ones we already registered */ 2295 hidinput_disconnect(hid); 2296 2297 return -1; 2298 } 2299 EXPORT_SYMBOL_GPL(hidinput_connect); 2300 2301 void hidinput_disconnect(struct hid_device *hid) 2302 { 2303 struct hid_input *hidinput, *next; 2304 2305 hidinput_cleanup_battery(hid); 2306 2307 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2308 list_del(&hidinput->list); 2309 if (hidinput->registered) 2310 input_unregister_device(hidinput->input); 2311 else 2312 input_free_device(hidinput->input); 2313 kfree(hidinput->name); 2314 kfree(hidinput); 2315 } 2316 2317 /* led_work is spawned by input_dev callbacks, but doesn't access the 2318 * parent input_dev at all. Once all input devices are removed, we 2319 * know that led_work will never get restarted, so we can cancel it 2320 * synchronously and are safe. */ 2321 cancel_work_sync(&hid->led_work); 2322 } 2323 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2324