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 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) 52 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) 53 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) 54 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c)) 55 56 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 57 &max, EV_ABS, (c)) 58 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 59 &max, EV_KEY, (c)) 60 61 static bool match_scancode(struct hid_usage *usage, 62 unsigned int cur_idx, unsigned int scancode) 63 { 64 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode; 65 } 66 67 static bool match_keycode(struct hid_usage *usage, 68 unsigned int cur_idx, unsigned int keycode) 69 { 70 /* 71 * We should exclude unmapped usages when doing lookup by keycode. 72 */ 73 return (usage->type == EV_KEY && usage->code == keycode); 74 } 75 76 static bool match_index(struct hid_usage *usage, 77 unsigned int cur_idx, unsigned int idx) 78 { 79 return cur_idx == idx; 80 } 81 82 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage, 83 unsigned int cur_idx, unsigned int val); 84 85 static struct hid_usage *hidinput_find_key(struct hid_device *hid, 86 hid_usage_cmp_t match, 87 unsigned int value, 88 unsigned int *usage_idx) 89 { 90 unsigned int i, j, k, cur_idx = 0; 91 struct hid_report *report; 92 struct hid_usage *usage; 93 94 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 95 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 96 for (i = 0; i < report->maxfield; i++) { 97 for (j = 0; j < report->field[i]->maxusage; j++) { 98 usage = report->field[i]->usage + j; 99 if (usage->type == EV_KEY || usage->type == 0) { 100 if (match(usage, cur_idx, value)) { 101 if (usage_idx) 102 *usage_idx = cur_idx; 103 return usage; 104 } 105 cur_idx++; 106 } 107 } 108 } 109 } 110 } 111 return NULL; 112 } 113 114 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid, 115 const struct input_keymap_entry *ke, 116 unsigned int *index) 117 { 118 struct hid_usage *usage; 119 unsigned int scancode; 120 121 if (ke->flags & INPUT_KEYMAP_BY_INDEX) 122 usage = hidinput_find_key(hid, match_index, ke->index, index); 123 else if (input_scancode_to_scalar(ke, &scancode) == 0) 124 usage = hidinput_find_key(hid, match_scancode, scancode, index); 125 else 126 usage = NULL; 127 128 return usage; 129 } 130 131 static int hidinput_getkeycode(struct input_dev *dev, 132 struct input_keymap_entry *ke) 133 { 134 struct hid_device *hid = input_get_drvdata(dev); 135 struct hid_usage *usage; 136 unsigned int scancode, index; 137 138 usage = hidinput_locate_usage(hid, ke, &index); 139 if (usage) { 140 ke->keycode = usage->type == EV_KEY ? 141 usage->code : KEY_RESERVED; 142 ke->index = index; 143 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE); 144 ke->len = sizeof(scancode); 145 memcpy(ke->scancode, &scancode, sizeof(scancode)); 146 return 0; 147 } 148 149 return -EINVAL; 150 } 151 152 static int hidinput_setkeycode(struct input_dev *dev, 153 const struct input_keymap_entry *ke, 154 unsigned int *old_keycode) 155 { 156 struct hid_device *hid = input_get_drvdata(dev); 157 struct hid_usage *usage; 158 159 usage = hidinput_locate_usage(hid, ke, NULL); 160 if (usage) { 161 *old_keycode = usage->type == EV_KEY ? 162 usage->code : KEY_RESERVED; 163 usage->type = EV_KEY; 164 usage->code = ke->keycode; 165 166 clear_bit(*old_keycode, dev->keybit); 167 set_bit(usage->code, dev->keybit); 168 dbg_hid("Assigned keycode %d to HID usage code %x\n", 169 usage->code, usage->hid); 170 171 /* 172 * Set the keybit for the old keycode if the old keycode is used 173 * by another key 174 */ 175 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 176 set_bit(*old_keycode, dev->keybit); 177 178 return 0; 179 } 180 181 return -EINVAL; 182 } 183 184 185 /** 186 * hidinput_calc_abs_res - calculate an absolute axis resolution 187 * @field: the HID report field to calculate resolution for 188 * @code: axis code 189 * 190 * The formula is: 191 * (logical_maximum - logical_minimum) 192 * resolution = ---------------------------------------------------------- 193 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 194 * 195 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 196 * 197 * Only exponent 1 length units are processed. Centimeters and inches are 198 * converted to millimeters. Degrees are converted to radians. 199 */ 200 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 201 { 202 __s32 unit_exponent = field->unit_exponent; 203 __s32 logical_extents = field->logical_maximum - 204 field->logical_minimum; 205 __s32 physical_extents = field->physical_maximum - 206 field->physical_minimum; 207 __s32 prev; 208 209 /* Check if the extents are sane */ 210 if (logical_extents <= 0 || physical_extents <= 0) 211 return 0; 212 213 /* 214 * Verify and convert units. 215 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 216 */ 217 switch (code) { 218 case ABS_X: 219 case ABS_Y: 220 case ABS_Z: 221 case ABS_MT_POSITION_X: 222 case ABS_MT_POSITION_Y: 223 case ABS_MT_TOOL_X: 224 case ABS_MT_TOOL_Y: 225 case ABS_MT_TOUCH_MAJOR: 226 case ABS_MT_TOUCH_MINOR: 227 if (field->unit == 0x11) { /* If centimeters */ 228 /* Convert to millimeters */ 229 unit_exponent += 1; 230 } else if (field->unit == 0x13) { /* If inches */ 231 /* Convert to millimeters */ 232 prev = physical_extents; 233 physical_extents *= 254; 234 if (physical_extents < prev) 235 return 0; 236 unit_exponent -= 1; 237 } else { 238 return 0; 239 } 240 break; 241 242 case ABS_RX: 243 case ABS_RY: 244 case ABS_RZ: 245 case ABS_WHEEL: 246 case ABS_TILT_X: 247 case ABS_TILT_Y: 248 if (field->unit == 0x14) { /* If degrees */ 249 /* Convert to radians */ 250 prev = logical_extents; 251 logical_extents *= 573; 252 if (logical_extents < prev) 253 return 0; 254 unit_exponent += 1; 255 } else if (field->unit != 0x12) { /* If not radians */ 256 return 0; 257 } 258 break; 259 260 default: 261 return 0; 262 } 263 264 /* Apply negative unit exponent */ 265 for (; unit_exponent < 0; unit_exponent++) { 266 prev = logical_extents; 267 logical_extents *= 10; 268 if (logical_extents < prev) 269 return 0; 270 } 271 /* Apply positive unit exponent */ 272 for (; unit_exponent > 0; unit_exponent--) { 273 prev = physical_extents; 274 physical_extents *= 10; 275 if (physical_extents < prev) 276 return 0; 277 } 278 279 /* Calculate resolution */ 280 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 281 } 282 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 283 284 #ifdef CONFIG_HID_BATTERY_STRENGTH 285 static enum power_supply_property hidinput_battery_props[] = { 286 POWER_SUPPLY_PROP_PRESENT, 287 POWER_SUPPLY_PROP_ONLINE, 288 POWER_SUPPLY_PROP_CAPACITY, 289 POWER_SUPPLY_PROP_MODEL_NAME, 290 POWER_SUPPLY_PROP_STATUS, 291 POWER_SUPPLY_PROP_SCOPE, 292 }; 293 294 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 295 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 296 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 297 298 static const struct hid_device_id hid_battery_quirks[] = { 299 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 300 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 301 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 302 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 303 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 304 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 305 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 306 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 307 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 308 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 309 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 310 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 311 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 312 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 313 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 314 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 315 USB_DEVICE_ID_ELECOM_BM084), 316 HID_BATTERY_QUIRK_IGNORE }, 317 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 318 USB_DEVICE_ID_SYMBOL_SCANNER_3), 319 HID_BATTERY_QUIRK_IGNORE }, 320 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 321 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 322 HID_BATTERY_QUIRK_IGNORE }, 323 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 324 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 325 HID_BATTERY_QUIRK_IGNORE }, 326 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 327 HID_BATTERY_QUIRK_IGNORE }, 328 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15), 329 HID_BATTERY_QUIRK_IGNORE }, 330 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15), 331 HID_BATTERY_QUIRK_IGNORE }, 332 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN), 333 HID_BATTERY_QUIRK_IGNORE }, 334 {} 335 }; 336 337 static unsigned find_battery_quirk(struct hid_device *hdev) 338 { 339 unsigned quirks = 0; 340 const struct hid_device_id *match; 341 342 match = hid_match_id(hdev, hid_battery_quirks); 343 if (match != NULL) 344 quirks = match->driver_data; 345 346 return quirks; 347 } 348 349 static int hidinput_scale_battery_capacity(struct hid_device *dev, 350 int value) 351 { 352 if (dev->battery_min < dev->battery_max && 353 value >= dev->battery_min && value <= dev->battery_max) 354 value = ((value - dev->battery_min) * 100) / 355 (dev->battery_max - dev->battery_min); 356 357 return value; 358 } 359 360 static int hidinput_query_battery_capacity(struct hid_device *dev) 361 { 362 u8 *buf; 363 int ret; 364 365 buf = kmalloc(4, GFP_KERNEL); 366 if (!buf) 367 return -ENOMEM; 368 369 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 370 dev->battery_report_type, HID_REQ_GET_REPORT); 371 if (ret < 2) { 372 kfree(buf); 373 return -ENODATA; 374 } 375 376 ret = hidinput_scale_battery_capacity(dev, buf[1]); 377 kfree(buf); 378 return ret; 379 } 380 381 static int hidinput_get_battery_property(struct power_supply *psy, 382 enum power_supply_property prop, 383 union power_supply_propval *val) 384 { 385 struct hid_device *dev = power_supply_get_drvdata(psy); 386 int value; 387 int ret = 0; 388 389 switch (prop) { 390 case POWER_SUPPLY_PROP_PRESENT: 391 case POWER_SUPPLY_PROP_ONLINE: 392 val->intval = 1; 393 break; 394 395 case POWER_SUPPLY_PROP_CAPACITY: 396 if (dev->battery_status != HID_BATTERY_REPORTED && 397 !dev->battery_avoid_query) { 398 value = hidinput_query_battery_capacity(dev); 399 if (value < 0) 400 return value; 401 } else { 402 value = dev->battery_capacity; 403 } 404 405 val->intval = value; 406 break; 407 408 case POWER_SUPPLY_PROP_MODEL_NAME: 409 val->strval = dev->name; 410 break; 411 412 case POWER_SUPPLY_PROP_STATUS: 413 if (dev->battery_status != HID_BATTERY_REPORTED && 414 !dev->battery_avoid_query) { 415 value = hidinput_query_battery_capacity(dev); 416 if (value < 0) 417 return value; 418 419 dev->battery_capacity = value; 420 dev->battery_status = HID_BATTERY_QUERIED; 421 } 422 423 if (dev->battery_status == HID_BATTERY_UNKNOWN) 424 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 425 else 426 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 427 break; 428 429 case POWER_SUPPLY_PROP_SCOPE: 430 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 431 break; 432 433 default: 434 ret = -EINVAL; 435 break; 436 } 437 438 return ret; 439 } 440 441 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 442 struct hid_field *field, bool is_percentage) 443 { 444 struct power_supply_desc *psy_desc; 445 struct power_supply_config psy_cfg = { .drv_data = dev, }; 446 unsigned quirks; 447 s32 min, max; 448 int error; 449 450 if (dev->battery) 451 return 0; /* already initialized? */ 452 453 quirks = find_battery_quirk(dev); 454 455 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 456 dev->bus, dev->vendor, dev->product, dev->version, quirks); 457 458 if (quirks & HID_BATTERY_QUIRK_IGNORE) 459 return 0; 460 461 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 462 if (!psy_desc) 463 return -ENOMEM; 464 465 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 466 strlen(dev->uniq) ? 467 dev->uniq : dev_name(&dev->dev)); 468 if (!psy_desc->name) { 469 error = -ENOMEM; 470 goto err_free_mem; 471 } 472 473 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 474 psy_desc->properties = hidinput_battery_props; 475 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 476 psy_desc->use_for_apm = 0; 477 psy_desc->get_property = hidinput_get_battery_property; 478 479 min = field->logical_minimum; 480 max = field->logical_maximum; 481 482 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 483 min = 0; 484 max = 100; 485 } 486 487 if (quirks & HID_BATTERY_QUIRK_FEATURE) 488 report_type = HID_FEATURE_REPORT; 489 490 dev->battery_min = min; 491 dev->battery_max = max; 492 dev->battery_report_type = report_type; 493 dev->battery_report_id = field->report->id; 494 495 /* 496 * Stylus is normally not connected to the device and thus we 497 * can't query the device and get meaningful battery strength. 498 * We have to wait for the device to report it on its own. 499 */ 500 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 501 field->physical == HID_DG_STYLUS; 502 503 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 504 if (IS_ERR(dev->battery)) { 505 error = PTR_ERR(dev->battery); 506 hid_warn(dev, "can't register power supply: %d\n", error); 507 goto err_free_name; 508 } 509 510 power_supply_powers(dev->battery, &dev->dev); 511 return 0; 512 513 err_free_name: 514 kfree(psy_desc->name); 515 err_free_mem: 516 kfree(psy_desc); 517 dev->battery = NULL; 518 return error; 519 } 520 521 static void hidinput_cleanup_battery(struct hid_device *dev) 522 { 523 const struct power_supply_desc *psy_desc; 524 525 if (!dev->battery) 526 return; 527 528 psy_desc = dev->battery->desc; 529 power_supply_unregister(dev->battery); 530 kfree(psy_desc->name); 531 kfree(psy_desc); 532 dev->battery = NULL; 533 } 534 535 static void hidinput_update_battery(struct hid_device *dev, int value) 536 { 537 int capacity; 538 539 if (!dev->battery) 540 return; 541 542 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 543 return; 544 545 capacity = hidinput_scale_battery_capacity(dev, value); 546 547 if (dev->battery_status != HID_BATTERY_REPORTED || 548 capacity != dev->battery_capacity || 549 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 550 dev->battery_capacity = capacity; 551 dev->battery_status = HID_BATTERY_REPORTED; 552 dev->battery_ratelimit_time = 553 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 554 power_supply_changed(dev->battery); 555 } 556 } 557 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 558 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 559 struct hid_field *field, bool is_percentage) 560 { 561 return 0; 562 } 563 564 static void hidinput_cleanup_battery(struct hid_device *dev) 565 { 566 } 567 568 static void hidinput_update_battery(struct hid_device *dev, int value) 569 { 570 } 571 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 572 573 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 574 unsigned int type, unsigned int usage) 575 { 576 struct hid_collection *collection; 577 578 collection = &device->collection[field->usage->collection_index]; 579 580 return collection->type == type && collection->usage == usage; 581 } 582 583 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 584 struct hid_usage *usage) 585 { 586 struct input_dev *input = hidinput->input; 587 struct hid_device *device = input_get_drvdata(input); 588 int max = 0, code; 589 unsigned long *bit = NULL; 590 591 field->hidinput = hidinput; 592 593 if (field->flags & HID_MAIN_ITEM_CONSTANT) 594 goto ignore; 595 596 /* Ignore if report count is out of bounds. */ 597 if (field->report_count < 1) 598 goto ignore; 599 600 /* only LED usages are supported in output fields */ 601 if (field->report_type == HID_OUTPUT_REPORT && 602 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 603 goto ignore; 604 } 605 606 if (device->driver->input_mapping) { 607 int ret = device->driver->input_mapping(device, hidinput, field, 608 usage, &bit, &max); 609 if (ret > 0) 610 goto mapped; 611 if (ret < 0) 612 goto ignore; 613 } 614 615 switch (usage->hid & HID_USAGE_PAGE) { 616 case HID_UP_UNDEFINED: 617 goto ignore; 618 619 case HID_UP_KEYBOARD: 620 set_bit(EV_REP, input->evbit); 621 622 if ((usage->hid & HID_USAGE) < 256) { 623 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 624 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 625 } else 626 map_key(KEY_UNKNOWN); 627 628 break; 629 630 case HID_UP_BUTTON: 631 code = ((usage->hid - 1) & HID_USAGE); 632 633 switch (field->application) { 634 case HID_GD_MOUSE: 635 case HID_GD_POINTER: code += BTN_MOUSE; break; 636 case HID_GD_JOYSTICK: 637 if (code <= 0xf) 638 code += BTN_JOYSTICK; 639 else 640 code += BTN_TRIGGER_HAPPY - 0x10; 641 break; 642 case HID_GD_GAMEPAD: 643 if (code <= 0xf) 644 code += BTN_GAMEPAD; 645 else 646 code += BTN_TRIGGER_HAPPY - 0x10; 647 break; 648 case HID_CP_CONSUMER_CONTROL: 649 if (hidinput_field_in_collection(device, field, 650 HID_COLLECTION_NAMED_ARRAY, 651 HID_CP_PROGRAMMABLEBUTTONS)) { 652 if (code <= 0x1d) 653 code += KEY_MACRO1; 654 else 655 code += BTN_TRIGGER_HAPPY - 0x1e; 656 break; 657 } 658 fallthrough; 659 default: 660 switch (field->physical) { 661 case HID_GD_MOUSE: 662 case HID_GD_POINTER: code += BTN_MOUSE; break; 663 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 664 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 665 default: code += BTN_MISC; 666 } 667 } 668 669 map_key(code); 670 break; 671 672 case HID_UP_SIMULATION: 673 switch (usage->hid & 0xffff) { 674 case 0xba: map_abs(ABS_RUDDER); break; 675 case 0xbb: map_abs(ABS_THROTTLE); break; 676 case 0xc4: map_abs(ABS_GAS); break; 677 case 0xc5: map_abs(ABS_BRAKE); break; 678 case 0xc8: map_abs(ABS_WHEEL); break; 679 default: goto ignore; 680 } 681 break; 682 683 case HID_UP_GENDESK: 684 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 685 switch (usage->hid & 0xf) { 686 case 0x1: map_key_clear(KEY_POWER); break; 687 case 0x2: map_key_clear(KEY_SLEEP); break; 688 case 0x3: map_key_clear(KEY_WAKEUP); break; 689 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 690 case 0x5: map_key_clear(KEY_MENU); break; 691 case 0x6: map_key_clear(KEY_PROG1); break; 692 case 0x7: map_key_clear(KEY_HELP); break; 693 case 0x8: map_key_clear(KEY_EXIT); break; 694 case 0x9: map_key_clear(KEY_SELECT); break; 695 case 0xa: map_key_clear(KEY_RIGHT); break; 696 case 0xb: map_key_clear(KEY_LEFT); break; 697 case 0xc: map_key_clear(KEY_UP); break; 698 case 0xd: map_key_clear(KEY_DOWN); break; 699 case 0xe: map_key_clear(KEY_POWER2); break; 700 case 0xf: map_key_clear(KEY_RESTART); break; 701 default: goto unknown; 702 } 703 break; 704 } 705 706 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 707 switch (usage->hid & 0xf) { 708 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 709 default: goto ignore; 710 } 711 break; 712 } 713 714 /* 715 * Some lazy vendors declare 255 usages for System Control, 716 * leading to the creation of ABS_X|Y axis and too many others. 717 * It wouldn't be a problem if joydev doesn't consider the 718 * device as a joystick then. 719 */ 720 if (field->application == HID_GD_SYSTEM_CONTROL) 721 goto ignore; 722 723 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 724 switch (usage->hid) { 725 case HID_GD_UP: usage->hat_dir = 1; break; 726 case HID_GD_DOWN: usage->hat_dir = 5; break; 727 case HID_GD_RIGHT: usage->hat_dir = 3; break; 728 case HID_GD_LEFT: usage->hat_dir = 7; break; 729 default: goto unknown; 730 } 731 if (field->dpad) { 732 map_abs(field->dpad); 733 goto ignore; 734 } 735 map_abs(ABS_HAT0X); 736 break; 737 } 738 739 switch (usage->hid) { 740 /* These usage IDs map directly to the usage codes. */ 741 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 742 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 743 if (field->flags & HID_MAIN_ITEM_RELATIVE) 744 map_rel(usage->hid & 0xf); 745 else 746 map_abs_clear(usage->hid & 0xf); 747 break; 748 749 case HID_GD_WHEEL: 750 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 751 set_bit(REL_WHEEL, input->relbit); 752 map_rel(REL_WHEEL_HI_RES); 753 } else { 754 map_abs(usage->hid & 0xf); 755 } 756 break; 757 case HID_GD_SLIDER: case HID_GD_DIAL: 758 if (field->flags & HID_MAIN_ITEM_RELATIVE) 759 map_rel(usage->hid & 0xf); 760 else 761 map_abs(usage->hid & 0xf); 762 break; 763 764 case HID_GD_HATSWITCH: 765 usage->hat_min = field->logical_minimum; 766 usage->hat_max = field->logical_maximum; 767 map_abs(ABS_HAT0X); 768 break; 769 770 case HID_GD_START: map_key_clear(BTN_START); break; 771 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 772 773 case HID_GD_RFKILL_BTN: 774 /* MS wireless radio ctl extension, also check CA */ 775 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 776 map_key_clear(KEY_RFKILL); 777 /* We need to simulate the btn release */ 778 field->flags |= HID_MAIN_ITEM_RELATIVE; 779 break; 780 } 781 goto unknown; 782 783 default: goto unknown; 784 } 785 786 break; 787 788 case HID_UP_LED: 789 switch (usage->hid & 0xffff) { /* HID-Value: */ 790 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 791 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 792 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 793 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 794 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 795 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 796 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 797 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 798 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 799 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 800 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 801 802 default: goto ignore; 803 } 804 break; 805 806 case HID_UP_DIGITIZER: 807 if ((field->application & 0xff) == 0x01) /* Digitizer */ 808 __set_bit(INPUT_PROP_POINTER, input->propbit); 809 else if ((field->application & 0xff) == 0x02) /* Pen */ 810 __set_bit(INPUT_PROP_DIRECT, input->propbit); 811 812 switch (usage->hid & 0xff) { 813 case 0x00: /* Undefined */ 814 goto ignore; 815 816 case 0x30: /* TipPressure */ 817 if (!test_bit(BTN_TOUCH, input->keybit)) { 818 device->quirks |= HID_QUIRK_NOTOUCH; 819 set_bit(EV_KEY, input->evbit); 820 set_bit(BTN_TOUCH, input->keybit); 821 } 822 map_abs_clear(ABS_PRESSURE); 823 break; 824 825 case 0x32: /* InRange */ 826 switch (field->physical & 0xff) { 827 case 0x21: map_key(BTN_TOOL_MOUSE); break; 828 case 0x22: map_key(BTN_TOOL_FINGER); break; 829 default: map_key(BTN_TOOL_PEN); break; 830 } 831 break; 832 833 case 0x3b: /* Battery Strength */ 834 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 835 usage->type = EV_PWR; 836 return; 837 838 case 0x3c: /* Invert */ 839 map_key_clear(BTN_TOOL_RUBBER); 840 break; 841 842 case 0x3d: /* X Tilt */ 843 map_abs_clear(ABS_TILT_X); 844 break; 845 846 case 0x3e: /* Y Tilt */ 847 map_abs_clear(ABS_TILT_Y); 848 break; 849 850 case 0x33: /* Touch */ 851 case 0x42: /* TipSwitch */ 852 case 0x43: /* TipSwitch2 */ 853 device->quirks &= ~HID_QUIRK_NOTOUCH; 854 map_key_clear(BTN_TOUCH); 855 break; 856 857 case 0x44: /* BarrelSwitch */ 858 map_key_clear(BTN_STYLUS); 859 break; 860 861 case 0x45: /* ERASER */ 862 /* 863 * This event is reported when eraser tip touches the surface. 864 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 865 * tool gets in proximity. 866 */ 867 map_key_clear(BTN_TOUCH); 868 break; 869 870 case 0x46: /* TabletPick */ 871 case 0x5a: /* SecondaryBarrelSwitch */ 872 map_key_clear(BTN_STYLUS2); 873 break; 874 875 case 0x5b: /* TransducerSerialNumber */ 876 case 0x6e: /* TransducerSerialNumber2 */ 877 usage->type = EV_MSC; 878 usage->code = MSC_SERIAL; 879 bit = input->mscbit; 880 max = MSC_MAX; 881 break; 882 883 default: goto unknown; 884 } 885 break; 886 887 case HID_UP_TELEPHONY: 888 switch (usage->hid & HID_USAGE) { 889 case 0x2f: map_key_clear(KEY_MICMUTE); break; 890 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 891 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 892 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 893 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 894 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 895 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 896 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 897 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 898 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 899 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 900 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 901 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 902 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 903 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 904 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 905 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 906 default: goto ignore; 907 } 908 break; 909 910 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 911 switch (usage->hid & HID_USAGE) { 912 case 0x000: goto ignore; 913 case 0x030: map_key_clear(KEY_POWER); break; 914 case 0x031: map_key_clear(KEY_RESTART); break; 915 case 0x032: map_key_clear(KEY_SLEEP); break; 916 case 0x034: map_key_clear(KEY_SLEEP); break; 917 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 918 case 0x036: map_key_clear(BTN_MISC); break; 919 920 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 921 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 922 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 923 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 924 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 925 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 926 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 927 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 928 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 929 930 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 931 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 932 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 933 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 934 case 0x069: map_key_clear(KEY_RED); break; 935 case 0x06a: map_key_clear(KEY_GREEN); break; 936 case 0x06b: map_key_clear(KEY_BLUE); break; 937 case 0x06c: map_key_clear(KEY_YELLOW); break; 938 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 939 940 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 941 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 942 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 943 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 944 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 945 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 946 947 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 948 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 949 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 950 951 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 952 case 0x083: map_key_clear(KEY_LAST); break; 953 case 0x084: map_key_clear(KEY_ENTER); break; 954 case 0x088: map_key_clear(KEY_PC); break; 955 case 0x089: map_key_clear(KEY_TV); break; 956 case 0x08a: map_key_clear(KEY_WWW); break; 957 case 0x08b: map_key_clear(KEY_DVD); break; 958 case 0x08c: map_key_clear(KEY_PHONE); break; 959 case 0x08d: map_key_clear(KEY_PROGRAM); break; 960 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 961 case 0x08f: map_key_clear(KEY_GAMES); break; 962 case 0x090: map_key_clear(KEY_MEMO); break; 963 case 0x091: map_key_clear(KEY_CD); break; 964 case 0x092: map_key_clear(KEY_VCR); break; 965 case 0x093: map_key_clear(KEY_TUNER); break; 966 case 0x094: map_key_clear(KEY_EXIT); break; 967 case 0x095: map_key_clear(KEY_HELP); break; 968 case 0x096: map_key_clear(KEY_TAPE); break; 969 case 0x097: map_key_clear(KEY_TV2); break; 970 case 0x098: map_key_clear(KEY_SAT); break; 971 case 0x09a: map_key_clear(KEY_PVR); break; 972 973 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 974 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 975 case 0x0a0: map_key_clear(KEY_VCR2); break; 976 977 case 0x0b0: map_key_clear(KEY_PLAY); break; 978 case 0x0b1: map_key_clear(KEY_PAUSE); break; 979 case 0x0b2: map_key_clear(KEY_RECORD); break; 980 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 981 case 0x0b4: map_key_clear(KEY_REWIND); break; 982 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 983 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 984 case 0x0b7: map_key_clear(KEY_STOPCD); break; 985 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 986 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 987 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 988 case 0x0bf: map_key_clear(KEY_SLOW); break; 989 990 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 991 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 992 993 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 994 995 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 996 case 0x0e2: map_key_clear(KEY_MUTE); break; 997 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 998 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 999 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1000 case 0x0f5: map_key_clear(KEY_SLOW); break; 1001 1002 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1003 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1004 case 0x183: map_key_clear(KEY_CONFIG); break; 1005 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1006 case 0x185: map_key_clear(KEY_EDITOR); break; 1007 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1008 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1009 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1010 case 0x189: map_key_clear(KEY_DATABASE); break; 1011 case 0x18a: map_key_clear(KEY_MAIL); break; 1012 case 0x18b: map_key_clear(KEY_NEWS); break; 1013 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1014 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1015 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1016 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1017 case 0x190: map_key_clear(KEY_JOURNAL); break; 1018 case 0x191: map_key_clear(KEY_FINANCE); break; 1019 case 0x192: map_key_clear(KEY_CALC); break; 1020 case 0x193: map_key_clear(KEY_PLAYER); break; 1021 case 0x194: map_key_clear(KEY_FILE); break; 1022 case 0x196: map_key_clear(KEY_WWW); break; 1023 case 0x199: map_key_clear(KEY_CHAT); break; 1024 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1025 case 0x19e: map_key_clear(KEY_COFFEE); break; 1026 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1027 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1028 case 0x1a3: map_key_clear(KEY_NEXT); break; 1029 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1030 case 0x1a6: map_key_clear(KEY_HELP); break; 1031 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1032 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1033 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1034 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1035 case 0x1b4: map_key_clear(KEY_FILE); break; 1036 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1037 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1038 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1039 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1040 case 0x1bd: map_key_clear(KEY_INFO); break; 1041 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1042 case 0x201: map_key_clear(KEY_NEW); break; 1043 case 0x202: map_key_clear(KEY_OPEN); break; 1044 case 0x203: map_key_clear(KEY_CLOSE); break; 1045 case 0x204: map_key_clear(KEY_EXIT); break; 1046 case 0x207: map_key_clear(KEY_SAVE); break; 1047 case 0x208: map_key_clear(KEY_PRINT); break; 1048 case 0x209: map_key_clear(KEY_PROPS); break; 1049 case 0x21a: map_key_clear(KEY_UNDO); break; 1050 case 0x21b: map_key_clear(KEY_COPY); break; 1051 case 0x21c: map_key_clear(KEY_CUT); break; 1052 case 0x21d: map_key_clear(KEY_PASTE); break; 1053 case 0x21f: map_key_clear(KEY_FIND); break; 1054 case 0x221: map_key_clear(KEY_SEARCH); break; 1055 case 0x222: map_key_clear(KEY_GOTO); break; 1056 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1057 case 0x224: map_key_clear(KEY_BACK); break; 1058 case 0x225: map_key_clear(KEY_FORWARD); break; 1059 case 0x226: map_key_clear(KEY_STOP); break; 1060 case 0x227: map_key_clear(KEY_REFRESH); break; 1061 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1062 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1063 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1064 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1065 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1066 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1067 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1068 case 0x238: /* AC Pan */ 1069 set_bit(REL_HWHEEL, input->relbit); 1070 map_rel(REL_HWHEEL_HI_RES); 1071 break; 1072 case 0x23d: map_key_clear(KEY_EDIT); break; 1073 case 0x25f: map_key_clear(KEY_CANCEL); break; 1074 case 0x269: map_key_clear(KEY_INSERT); break; 1075 case 0x26a: map_key_clear(KEY_DELETE); break; 1076 case 0x279: map_key_clear(KEY_REDO); break; 1077 1078 case 0x289: map_key_clear(KEY_REPLY); break; 1079 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1080 case 0x28c: map_key_clear(KEY_SEND); break; 1081 1082 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1083 1084 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1085 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1086 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1087 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1088 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1089 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1090 1091 case 0x29f: map_key_clear(KEY_SCALE); break; 1092 1093 default: map_key_clear(KEY_UNKNOWN); 1094 } 1095 break; 1096 1097 case HID_UP_GENDEVCTRLS: 1098 switch (usage->hid) { 1099 case HID_DC_BATTERYSTRENGTH: 1100 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1101 usage->type = EV_PWR; 1102 return; 1103 } 1104 goto unknown; 1105 1106 case HID_UP_BATTERY: 1107 switch (usage->hid) { 1108 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1109 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1110 usage->type = EV_PWR; 1111 return; 1112 } 1113 goto unknown; 1114 1115 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1116 set_bit(EV_REP, input->evbit); 1117 switch (usage->hid & HID_USAGE) { 1118 case 0x021: map_key_clear(KEY_PRINT); break; 1119 case 0x070: map_key_clear(KEY_HP); break; 1120 case 0x071: map_key_clear(KEY_CAMERA); break; 1121 case 0x072: map_key_clear(KEY_SOUND); break; 1122 case 0x073: map_key_clear(KEY_QUESTION); break; 1123 case 0x080: map_key_clear(KEY_EMAIL); break; 1124 case 0x081: map_key_clear(KEY_CHAT); break; 1125 case 0x082: map_key_clear(KEY_SEARCH); break; 1126 case 0x083: map_key_clear(KEY_CONNECT); break; 1127 case 0x084: map_key_clear(KEY_FINANCE); break; 1128 case 0x085: map_key_clear(KEY_SPORT); break; 1129 case 0x086: map_key_clear(KEY_SHOP); break; 1130 default: goto ignore; 1131 } 1132 break; 1133 1134 case HID_UP_HPVENDOR2: 1135 set_bit(EV_REP, input->evbit); 1136 switch (usage->hid & HID_USAGE) { 1137 case 0x001: map_key_clear(KEY_MICMUTE); break; 1138 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1139 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1140 default: goto ignore; 1141 } 1142 break; 1143 1144 case HID_UP_MSVENDOR: 1145 goto ignore; 1146 1147 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1148 set_bit(EV_REP, input->evbit); 1149 goto ignore; 1150 1151 case HID_UP_LOGIVENDOR: 1152 /* intentional fallback */ 1153 case HID_UP_LOGIVENDOR2: 1154 /* intentional fallback */ 1155 case HID_UP_LOGIVENDOR3: 1156 goto ignore; 1157 1158 case HID_UP_PID: 1159 switch (usage->hid & HID_USAGE) { 1160 case 0xa4: map_key_clear(BTN_DEAD); break; 1161 default: goto ignore; 1162 } 1163 break; 1164 1165 default: 1166 unknown: 1167 if (field->report_size == 1) { 1168 if (field->report->type == HID_OUTPUT_REPORT) { 1169 map_led(LED_MISC); 1170 break; 1171 } 1172 map_key(BTN_MISC); 1173 break; 1174 } 1175 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1176 map_rel(REL_MISC); 1177 break; 1178 } 1179 map_abs(ABS_MISC); 1180 break; 1181 } 1182 1183 mapped: 1184 /* Mapping failed, bail out */ 1185 if (!bit) 1186 return; 1187 1188 if (device->driver->input_mapped && 1189 device->driver->input_mapped(device, hidinput, field, usage, 1190 &bit, &max) < 0) { 1191 /* 1192 * The driver indicated that no further generic handling 1193 * of the usage is desired. 1194 */ 1195 return; 1196 } 1197 1198 set_bit(usage->type, input->evbit); 1199 1200 /* 1201 * This part is *really* controversial: 1202 * - HID aims at being generic so we should do our best to export 1203 * all incoming events 1204 * - HID describes what events are, so there is no reason for ABS_X 1205 * to be mapped to ABS_Y 1206 * - HID is using *_MISC+N as a default value, but nothing prevents 1207 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1208 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1209 * processing) 1210 * 1211 * If devices still want to use this (at their own risk), they will 1212 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1213 * the default should be a reliable mapping. 1214 */ 1215 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1216 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1217 usage->code = find_next_zero_bit(bit, 1218 max + 1, 1219 usage->code); 1220 } else { 1221 device->status |= HID_STAT_DUP_DETECTED; 1222 goto ignore; 1223 } 1224 } 1225 1226 if (usage->code > max) 1227 goto ignore; 1228 1229 if (usage->type == EV_ABS) { 1230 1231 int a = field->logical_minimum; 1232 int b = field->logical_maximum; 1233 1234 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1235 a = field->logical_minimum = 0; 1236 b = field->logical_maximum = 255; 1237 } 1238 1239 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1240 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1241 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1242 1243 input_abs_set_res(input, usage->code, 1244 hidinput_calc_abs_res(field, usage->code)); 1245 1246 /* use a larger default input buffer for MT devices */ 1247 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1248 input_set_events_per_packet(input, 60); 1249 } 1250 1251 if (usage->type == EV_ABS && 1252 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1253 int i; 1254 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1255 input_set_abs_params(input, i, -1, 1, 0, 0); 1256 set_bit(i, input->absbit); 1257 } 1258 if (usage->hat_dir && !field->dpad) 1259 field->dpad = usage->code; 1260 } 1261 1262 /* for those devices which produce Consumer volume usage as relative, 1263 * we emulate pressing volumeup/volumedown appropriate number of times 1264 * in hidinput_hid_event() 1265 */ 1266 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1267 (usage->code == ABS_VOLUME)) { 1268 set_bit(KEY_VOLUMEUP, input->keybit); 1269 set_bit(KEY_VOLUMEDOWN, input->keybit); 1270 } 1271 1272 if (usage->type == EV_KEY) { 1273 set_bit(EV_MSC, input->evbit); 1274 set_bit(MSC_SCAN, input->mscbit); 1275 } 1276 1277 return; 1278 1279 ignore: 1280 usage->type = 0; 1281 usage->code = 0; 1282 } 1283 1284 static void hidinput_handle_scroll(struct hid_usage *usage, 1285 struct input_dev *input, 1286 __s32 value) 1287 { 1288 int code; 1289 int hi_res, lo_res; 1290 1291 if (value == 0) 1292 return; 1293 1294 if (usage->code == REL_WHEEL_HI_RES) 1295 code = REL_WHEEL; 1296 else 1297 code = REL_HWHEEL; 1298 1299 /* 1300 * Windows reports one wheel click as value 120. Where a high-res 1301 * scroll wheel is present, a fraction of 120 is reported instead. 1302 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1303 * adhere to the 120 expectation. 1304 */ 1305 hi_res = value * 120/usage->resolution_multiplier; 1306 1307 usage->wheel_accumulated += hi_res; 1308 lo_res = usage->wheel_accumulated/120; 1309 if (lo_res) 1310 usage->wheel_accumulated -= lo_res * 120; 1311 1312 input_event(input, EV_REL, code, lo_res); 1313 input_event(input, EV_REL, usage->code, hi_res); 1314 } 1315 1316 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1317 { 1318 struct input_dev *input; 1319 unsigned *quirks = &hid->quirks; 1320 1321 if (!usage->type) 1322 return; 1323 1324 if (usage->type == EV_PWR) { 1325 hidinput_update_battery(hid, value); 1326 return; 1327 } 1328 1329 if (!field->hidinput) 1330 return; 1331 1332 input = field->hidinput->input; 1333 1334 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1335 int hat_dir = usage->hat_dir; 1336 if (!hat_dir) 1337 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1338 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1339 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1340 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1341 return; 1342 } 1343 1344 if (usage->hid == HID_DG_INVERT) { 1345 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); 1346 return; 1347 } 1348 1349 if (usage->hid == HID_DG_INRANGE) { 1350 if (value) { 1351 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); 1352 return; 1353 } 1354 input_event(input, usage->type, usage->code, 0); 1355 input_event(input, usage->type, BTN_TOOL_RUBBER, 0); 1356 return; 1357 } 1358 1359 if (usage->hid == HID_DG_TIPPRESSURE && (*quirks & HID_QUIRK_NOTOUCH)) { 1360 int a = field->logical_minimum; 1361 int b = field->logical_maximum; 1362 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); 1363 } 1364 1365 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ 1366 dbg_hid("Maximum Effects - %d\n",value); 1367 return; 1368 } 1369 1370 if (usage->hid == (HID_UP_PID | 0x7fUL)) { 1371 dbg_hid("PID Pool Report\n"); 1372 return; 1373 } 1374 1375 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1376 return; 1377 1378 if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES || 1379 usage->code == REL_HWHEEL_HI_RES)) { 1380 hidinput_handle_scroll(usage, input, value); 1381 return; 1382 } 1383 1384 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1385 (usage->code == ABS_VOLUME)) { 1386 int count = abs(value); 1387 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1388 int i; 1389 1390 for (i = 0; i < count; i++) { 1391 input_event(input, EV_KEY, direction, 1); 1392 input_sync(input); 1393 input_event(input, EV_KEY, direction, 0); 1394 input_sync(input); 1395 } 1396 return; 1397 } 1398 1399 /* 1400 * Ignore out-of-range values as per HID specification, 1401 * section 5.10 and 6.2.25, when NULL state bit is present. 1402 * When it's not, clamp the value to match Microsoft's input 1403 * driver as mentioned in "Required HID usages for digitizers": 1404 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1405 * 1406 * The logical_minimum < logical_maximum check is done so that we 1407 * don't unintentionally discard values sent by devices which 1408 * don't specify logical min and max. 1409 */ 1410 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1411 (field->logical_minimum < field->logical_maximum)) { 1412 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1413 (value < field->logical_minimum || 1414 value > field->logical_maximum)) { 1415 dbg_hid("Ignoring out-of-range value %x\n", value); 1416 return; 1417 } 1418 value = clamp(value, 1419 field->logical_minimum, 1420 field->logical_maximum); 1421 } 1422 1423 /* 1424 * Ignore reports for absolute data if the data didn't change. This is 1425 * not only an optimization but also fixes 'dead' key reports. Some 1426 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1427 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1428 * can only have one of them physically available. The 'dead' keys 1429 * report constant 0. As all map to the same keycode, they'd confuse 1430 * the input layer. If we filter the 'dead' keys on the HID level, we 1431 * skip the keycode translation and only forward real events. 1432 */ 1433 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1434 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1435 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1436 usage->usage_index < field->maxusage && 1437 value == field->value[usage->usage_index]) 1438 return; 1439 1440 /* report the usage code as scancode if the key status has changed */ 1441 if (usage->type == EV_KEY && 1442 (!test_bit(usage->code, input->key)) == value) 1443 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1444 1445 input_event(input, usage->type, usage->code, value); 1446 1447 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1448 usage->type == EV_KEY && value) { 1449 input_sync(input); 1450 input_event(input, usage->type, usage->code, 0); 1451 } 1452 } 1453 1454 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1455 { 1456 struct hid_input *hidinput; 1457 1458 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1459 return; 1460 1461 list_for_each_entry(hidinput, &hid->inputs, list) 1462 input_sync(hidinput->input); 1463 } 1464 EXPORT_SYMBOL_GPL(hidinput_report_event); 1465 1466 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field) 1467 { 1468 struct hid_report *report; 1469 int i, j; 1470 1471 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1472 for (i = 0; i < report->maxfield; i++) { 1473 *field = report->field[i]; 1474 for (j = 0; j < (*field)->maxusage; j++) 1475 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1476 return j; 1477 } 1478 } 1479 return -1; 1480 } 1481 EXPORT_SYMBOL_GPL(hidinput_find_field); 1482 1483 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1484 { 1485 struct hid_report *report; 1486 struct hid_field *field; 1487 int i, j; 1488 1489 list_for_each_entry(report, 1490 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1491 list) { 1492 for (i = 0; i < report->maxfield; i++) { 1493 field = report->field[i]; 1494 for (j = 0; j < field->maxusage; j++) 1495 if (field->usage[j].type == EV_LED) 1496 return field; 1497 } 1498 } 1499 return NULL; 1500 } 1501 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1502 1503 unsigned int hidinput_count_leds(struct hid_device *hid) 1504 { 1505 struct hid_report *report; 1506 struct hid_field *field; 1507 int i, j; 1508 unsigned int count = 0; 1509 1510 list_for_each_entry(report, 1511 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1512 list) { 1513 for (i = 0; i < report->maxfield; i++) { 1514 field = report->field[i]; 1515 for (j = 0; j < field->maxusage; j++) 1516 if (field->usage[j].type == EV_LED && 1517 field->value[j]) 1518 count += 1; 1519 } 1520 } 1521 return count; 1522 } 1523 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1524 1525 static void hidinput_led_worker(struct work_struct *work) 1526 { 1527 struct hid_device *hid = container_of(work, struct hid_device, 1528 led_work); 1529 struct hid_field *field; 1530 struct hid_report *report; 1531 int ret; 1532 u32 len; 1533 __u8 *buf; 1534 1535 field = hidinput_get_led_field(hid); 1536 if (!field) 1537 return; 1538 1539 /* 1540 * field->report is accessed unlocked regarding HID core. So there might 1541 * be another incoming SET-LED request from user-space, which changes 1542 * the LED state while we assemble our outgoing buffer. However, this 1543 * doesn't matter as hid_output_report() correctly converts it into a 1544 * boolean value no matter what information is currently set on the LED 1545 * field (even garbage). So the remote device will always get a valid 1546 * request. 1547 * And in case we send a wrong value, a next led worker is spawned 1548 * for every SET-LED request so the following worker will send the 1549 * correct value, guaranteed! 1550 */ 1551 1552 report = field->report; 1553 1554 /* use custom SET_REPORT request if possible (asynchronous) */ 1555 if (hid->ll_driver->request) 1556 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1557 1558 /* fall back to generic raw-output-report */ 1559 len = hid_report_len(report); 1560 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1561 if (!buf) 1562 return; 1563 1564 hid_output_report(report, buf); 1565 /* synchronous output report */ 1566 ret = hid_hw_output_report(hid, buf, len); 1567 if (ret == -ENOSYS) 1568 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1569 HID_REQ_SET_REPORT); 1570 kfree(buf); 1571 } 1572 1573 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1574 unsigned int code, int value) 1575 { 1576 struct hid_device *hid = input_get_drvdata(dev); 1577 struct hid_field *field; 1578 int offset; 1579 1580 if (type == EV_FF) 1581 return input_ff_event(dev, type, code, value); 1582 1583 if (type != EV_LED) 1584 return -1; 1585 1586 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1587 hid_warn(dev, "event field not found\n"); 1588 return -1; 1589 } 1590 1591 hid_set_field(field, offset, value); 1592 1593 schedule_work(&hid->led_work); 1594 return 0; 1595 } 1596 1597 static int hidinput_open(struct input_dev *dev) 1598 { 1599 struct hid_device *hid = input_get_drvdata(dev); 1600 1601 return hid_hw_open(hid); 1602 } 1603 1604 static void hidinput_close(struct input_dev *dev) 1605 { 1606 struct hid_device *hid = input_get_drvdata(dev); 1607 1608 hid_hw_close(hid); 1609 } 1610 1611 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1612 struct hid_report *report, bool use_logical_max) 1613 { 1614 struct hid_usage *usage; 1615 bool update_needed = false; 1616 bool get_report_completed = false; 1617 int i, j; 1618 1619 if (report->maxfield == 0) 1620 return false; 1621 1622 for (i = 0; i < report->maxfield; i++) { 1623 __s32 value = use_logical_max ? 1624 report->field[i]->logical_maximum : 1625 report->field[i]->logical_minimum; 1626 1627 /* There is no good reason for a Resolution 1628 * Multiplier to have a count other than 1. 1629 * Ignore that case. 1630 */ 1631 if (report->field[i]->report_count != 1) 1632 continue; 1633 1634 for (j = 0; j < report->field[i]->maxusage; j++) { 1635 usage = &report->field[i]->usage[j]; 1636 1637 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1638 continue; 1639 1640 /* 1641 * If we have more than one feature within this 1642 * report we need to fill in the bits from the 1643 * others before we can overwrite the ones for the 1644 * Resolution Multiplier. 1645 * 1646 * But if we're not allowed to read from the device, 1647 * we just bail. Such a device should not exist 1648 * anyway. 1649 */ 1650 if (!get_report_completed && report->maxfield > 1) { 1651 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1652 return update_needed; 1653 1654 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1655 hid_hw_wait(hid); 1656 get_report_completed = true; 1657 } 1658 1659 report->field[i]->value[j] = value; 1660 update_needed = true; 1661 } 1662 } 1663 1664 return update_needed; 1665 } 1666 1667 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1668 { 1669 struct hid_report_enum *rep_enum; 1670 struct hid_report *rep; 1671 int ret; 1672 1673 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1674 list_for_each_entry(rep, &rep_enum->report_list, list) { 1675 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1676 rep, true); 1677 1678 if (update_needed) { 1679 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1680 if (ret) { 1681 __hidinput_change_resolution_multipliers(hid, 1682 rep, false); 1683 return; 1684 } 1685 } 1686 } 1687 1688 /* refresh our structs */ 1689 hid_setup_resolution_multiplier(hid); 1690 } 1691 1692 static void report_features(struct hid_device *hid) 1693 { 1694 struct hid_driver *drv = hid->driver; 1695 struct hid_report_enum *rep_enum; 1696 struct hid_report *rep; 1697 struct hid_usage *usage; 1698 int i, j; 1699 1700 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1701 list_for_each_entry(rep, &rep_enum->report_list, list) 1702 for (i = 0; i < rep->maxfield; i++) { 1703 /* Ignore if report count is out of bounds. */ 1704 if (rep->field[i]->report_count < 1) 1705 continue; 1706 1707 for (j = 0; j < rep->field[i]->maxusage; j++) { 1708 usage = &rep->field[i]->usage[j]; 1709 1710 /* Verify if Battery Strength feature is available */ 1711 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1712 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1713 rep->field[i], false); 1714 1715 if (drv->feature_mapping) 1716 drv->feature_mapping(hid, rep->field[i], usage); 1717 } 1718 } 1719 } 1720 1721 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1722 unsigned int application) 1723 { 1724 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1725 struct input_dev *input_dev = input_allocate_device(); 1726 const char *suffix = NULL; 1727 size_t suffix_len, name_len; 1728 1729 if (!hidinput || !input_dev) 1730 goto fail; 1731 1732 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1733 hid->maxapplication > 1) { 1734 switch (application) { 1735 case HID_GD_KEYBOARD: 1736 suffix = "Keyboard"; 1737 break; 1738 case HID_GD_KEYPAD: 1739 suffix = "Keypad"; 1740 break; 1741 case HID_GD_MOUSE: 1742 suffix = "Mouse"; 1743 break; 1744 case HID_DG_STYLUS: 1745 suffix = "Pen"; 1746 break; 1747 case HID_DG_TOUCHSCREEN: 1748 suffix = "Touchscreen"; 1749 break; 1750 case HID_DG_TOUCHPAD: 1751 suffix = "Touchpad"; 1752 break; 1753 case HID_GD_SYSTEM_CONTROL: 1754 suffix = "System Control"; 1755 break; 1756 case HID_CP_CONSUMER_CONTROL: 1757 suffix = "Consumer Control"; 1758 break; 1759 case HID_GD_WIRELESS_RADIO_CTLS: 1760 suffix = "Wireless Radio Control"; 1761 break; 1762 case HID_GD_SYSTEM_MULTIAXIS: 1763 suffix = "System Multi Axis"; 1764 break; 1765 default: 1766 break; 1767 } 1768 } 1769 1770 if (suffix) { 1771 name_len = strlen(hid->name); 1772 suffix_len = strlen(suffix); 1773 if ((name_len < suffix_len) || 1774 strcmp(hid->name + name_len - suffix_len, suffix)) { 1775 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1776 hid->name, suffix); 1777 if (!hidinput->name) 1778 goto fail; 1779 } 1780 } 1781 1782 input_set_drvdata(input_dev, hid); 1783 input_dev->event = hidinput_input_event; 1784 input_dev->open = hidinput_open; 1785 input_dev->close = hidinput_close; 1786 input_dev->setkeycode = hidinput_setkeycode; 1787 input_dev->getkeycode = hidinput_getkeycode; 1788 1789 input_dev->name = hidinput->name ? hidinput->name : hid->name; 1790 input_dev->phys = hid->phys; 1791 input_dev->uniq = hid->uniq; 1792 input_dev->id.bustype = hid->bus; 1793 input_dev->id.vendor = hid->vendor; 1794 input_dev->id.product = hid->product; 1795 input_dev->id.version = hid->version; 1796 input_dev->dev.parent = &hid->dev; 1797 1798 hidinput->input = input_dev; 1799 hidinput->application = application; 1800 list_add_tail(&hidinput->list, &hid->inputs); 1801 1802 INIT_LIST_HEAD(&hidinput->reports); 1803 1804 return hidinput; 1805 1806 fail: 1807 kfree(hidinput); 1808 input_free_device(input_dev); 1809 hid_err(hid, "Out of memory during hid input probe\n"); 1810 return NULL; 1811 } 1812 1813 static bool hidinput_has_been_populated(struct hid_input *hidinput) 1814 { 1815 int i; 1816 unsigned long r = 0; 1817 1818 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 1819 r |= hidinput->input->evbit[i]; 1820 1821 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 1822 r |= hidinput->input->keybit[i]; 1823 1824 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 1825 r |= hidinput->input->relbit[i]; 1826 1827 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 1828 r |= hidinput->input->absbit[i]; 1829 1830 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 1831 r |= hidinput->input->mscbit[i]; 1832 1833 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 1834 r |= hidinput->input->ledbit[i]; 1835 1836 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 1837 r |= hidinput->input->sndbit[i]; 1838 1839 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 1840 r |= hidinput->input->ffbit[i]; 1841 1842 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 1843 r |= hidinput->input->swbit[i]; 1844 1845 return !!r; 1846 } 1847 1848 static void hidinput_cleanup_hidinput(struct hid_device *hid, 1849 struct hid_input *hidinput) 1850 { 1851 struct hid_report *report; 1852 int i, k; 1853 1854 list_del(&hidinput->list); 1855 input_free_device(hidinput->input); 1856 kfree(hidinput->name); 1857 1858 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1859 if (k == HID_OUTPUT_REPORT && 1860 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1861 continue; 1862 1863 list_for_each_entry(report, &hid->report_enum[k].report_list, 1864 list) { 1865 1866 for (i = 0; i < report->maxfield; i++) 1867 if (report->field[i]->hidinput == hidinput) 1868 report->field[i]->hidinput = NULL; 1869 } 1870 } 1871 1872 kfree(hidinput); 1873 } 1874 1875 static struct hid_input *hidinput_match(struct hid_report *report) 1876 { 1877 struct hid_device *hid = report->device; 1878 struct hid_input *hidinput; 1879 1880 list_for_each_entry(hidinput, &hid->inputs, list) { 1881 if (hidinput->report && 1882 hidinput->report->id == report->id) 1883 return hidinput; 1884 } 1885 1886 return NULL; 1887 } 1888 1889 static struct hid_input *hidinput_match_application(struct hid_report *report) 1890 { 1891 struct hid_device *hid = report->device; 1892 struct hid_input *hidinput; 1893 1894 list_for_each_entry(hidinput, &hid->inputs, list) { 1895 if (hidinput->application == report->application) 1896 return hidinput; 1897 1898 /* 1899 * Keep SystemControl and ConsumerControl applications together 1900 * with the main keyboard, if present. 1901 */ 1902 if ((report->application == HID_GD_SYSTEM_CONTROL || 1903 report->application == HID_CP_CONSUMER_CONTROL) && 1904 hidinput->application == HID_GD_KEYBOARD) { 1905 return hidinput; 1906 } 1907 } 1908 1909 return NULL; 1910 } 1911 1912 static inline void hidinput_configure_usages(struct hid_input *hidinput, 1913 struct hid_report *report) 1914 { 1915 int i, j; 1916 1917 for (i = 0; i < report->maxfield; i++) 1918 for (j = 0; j < report->field[i]->maxusage; j++) 1919 hidinput_configure_usage(hidinput, report->field[i], 1920 report->field[i]->usage + j); 1921 } 1922 1923 /* 1924 * Register the input device; print a message. 1925 * Configure the input layer interface 1926 * Read all reports and initialize the absolute field values. 1927 */ 1928 1929 int hidinput_connect(struct hid_device *hid, unsigned int force) 1930 { 1931 struct hid_driver *drv = hid->driver; 1932 struct hid_report *report; 1933 struct hid_input *next, *hidinput = NULL; 1934 unsigned int application; 1935 int i, k; 1936 1937 INIT_LIST_HEAD(&hid->inputs); 1938 INIT_WORK(&hid->led_work, hidinput_led_worker); 1939 1940 hid->status &= ~HID_STAT_DUP_DETECTED; 1941 1942 if (!force) { 1943 for (i = 0; i < hid->maxcollection; i++) { 1944 struct hid_collection *col = &hid->collection[i]; 1945 if (col->type == HID_COLLECTION_APPLICATION || 1946 col->type == HID_COLLECTION_PHYSICAL) 1947 if (IS_INPUT_APPLICATION(col->usage)) 1948 break; 1949 } 1950 1951 if (i == hid->maxcollection) 1952 return -1; 1953 } 1954 1955 report_features(hid); 1956 1957 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1958 if (k == HID_OUTPUT_REPORT && 1959 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1960 continue; 1961 1962 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1963 1964 if (!report->maxfield) 1965 continue; 1966 1967 application = report->application; 1968 1969 /* 1970 * Find the previous hidinput report attached 1971 * to this report id. 1972 */ 1973 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1974 hidinput = hidinput_match(report); 1975 else if (hid->maxapplication > 1 && 1976 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 1977 hidinput = hidinput_match_application(report); 1978 1979 if (!hidinput) { 1980 hidinput = hidinput_allocate(hid, application); 1981 if (!hidinput) 1982 goto out_unwind; 1983 } 1984 1985 hidinput_configure_usages(hidinput, report); 1986 1987 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1988 hidinput->report = report; 1989 1990 list_add_tail(&report->hidinput_list, 1991 &hidinput->reports); 1992 } 1993 } 1994 1995 hidinput_change_resolution_multipliers(hid); 1996 1997 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1998 if (drv->input_configured && 1999 drv->input_configured(hid, hidinput)) 2000 goto out_unwind; 2001 2002 if (!hidinput_has_been_populated(hidinput)) { 2003 /* no need to register an input device not populated */ 2004 hidinput_cleanup_hidinput(hid, hidinput); 2005 continue; 2006 } 2007 2008 if (input_register_device(hidinput->input)) 2009 goto out_unwind; 2010 hidinput->registered = true; 2011 } 2012 2013 if (list_empty(&hid->inputs)) { 2014 hid_err(hid, "No inputs registered, leaving\n"); 2015 goto out_unwind; 2016 } 2017 2018 if (hid->status & HID_STAT_DUP_DETECTED) 2019 hid_dbg(hid, 2020 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2021 2022 return 0; 2023 2024 out_unwind: 2025 /* unwind the ones we already registered */ 2026 hidinput_disconnect(hid); 2027 2028 return -1; 2029 } 2030 EXPORT_SYMBOL_GPL(hidinput_connect); 2031 2032 void hidinput_disconnect(struct hid_device *hid) 2033 { 2034 struct hid_input *hidinput, *next; 2035 2036 hidinput_cleanup_battery(hid); 2037 2038 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2039 list_del(&hidinput->list); 2040 if (hidinput->registered) 2041 input_unregister_device(hidinput->input); 2042 else 2043 input_free_device(hidinput->input); 2044 kfree(hidinput->name); 2045 kfree(hidinput); 2046 } 2047 2048 /* led_work is spawned by input_dev callbacks, but doesn't access the 2049 * parent input_dev at all. Once all input devices are removed, we 2050 * know that led_work will never get restarted, so we can cancel it 2051 * synchronously and are safe. */ 2052 cancel_work_sync(&hid->led_work); 2053 } 2054 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2055