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->code = ke->keycode; 164 165 clear_bit(*old_keycode, dev->keybit); 166 set_bit(usage->code, dev->keybit); 167 dbg_hid("Assigned keycode %d to HID usage code %x\n", 168 usage->code, usage->hid); 169 170 /* 171 * Set the keybit for the old keycode if the old keycode is used 172 * by another key 173 */ 174 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 175 set_bit(*old_keycode, dev->keybit); 176 177 return 0; 178 } 179 180 return -EINVAL; 181 } 182 183 184 /** 185 * hidinput_calc_abs_res - calculate an absolute axis resolution 186 * @field: the HID report field to calculate resolution for 187 * @code: axis code 188 * 189 * The formula is: 190 * (logical_maximum - logical_minimum) 191 * resolution = ---------------------------------------------------------- 192 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 193 * 194 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 195 * 196 * Only exponent 1 length units are processed. Centimeters and inches are 197 * converted to millimeters. Degrees are converted to radians. 198 */ 199 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 200 { 201 __s32 unit_exponent = field->unit_exponent; 202 __s32 logical_extents = field->logical_maximum - 203 field->logical_minimum; 204 __s32 physical_extents = field->physical_maximum - 205 field->physical_minimum; 206 __s32 prev; 207 208 /* Check if the extents are sane */ 209 if (logical_extents <= 0 || physical_extents <= 0) 210 return 0; 211 212 /* 213 * Verify and convert units. 214 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 215 */ 216 switch (code) { 217 case ABS_X: 218 case ABS_Y: 219 case ABS_Z: 220 case ABS_MT_POSITION_X: 221 case ABS_MT_POSITION_Y: 222 case ABS_MT_TOOL_X: 223 case ABS_MT_TOOL_Y: 224 case ABS_MT_TOUCH_MAJOR: 225 case ABS_MT_TOUCH_MINOR: 226 if (field->unit == 0x11) { /* If centimeters */ 227 /* Convert to millimeters */ 228 unit_exponent += 1; 229 } else if (field->unit == 0x13) { /* If inches */ 230 /* Convert to millimeters */ 231 prev = physical_extents; 232 physical_extents *= 254; 233 if (physical_extents < prev) 234 return 0; 235 unit_exponent -= 1; 236 } else { 237 return 0; 238 } 239 break; 240 241 case ABS_RX: 242 case ABS_RY: 243 case ABS_RZ: 244 case ABS_WHEEL: 245 case ABS_TILT_X: 246 case ABS_TILT_Y: 247 if (field->unit == 0x14) { /* If degrees */ 248 /* Convert to radians */ 249 prev = logical_extents; 250 logical_extents *= 573; 251 if (logical_extents < prev) 252 return 0; 253 unit_exponent += 1; 254 } else if (field->unit != 0x12) { /* If not radians */ 255 return 0; 256 } 257 break; 258 259 default: 260 return 0; 261 } 262 263 /* Apply negative unit exponent */ 264 for (; unit_exponent < 0; unit_exponent++) { 265 prev = logical_extents; 266 logical_extents *= 10; 267 if (logical_extents < prev) 268 return 0; 269 } 270 /* Apply positive unit exponent */ 271 for (; unit_exponent > 0; unit_exponent--) { 272 prev = physical_extents; 273 physical_extents *= 10; 274 if (physical_extents < prev) 275 return 0; 276 } 277 278 /* Calculate resolution */ 279 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 280 } 281 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 282 283 #ifdef CONFIG_HID_BATTERY_STRENGTH 284 static enum power_supply_property hidinput_battery_props[] = { 285 POWER_SUPPLY_PROP_PRESENT, 286 POWER_SUPPLY_PROP_ONLINE, 287 POWER_SUPPLY_PROP_CAPACITY, 288 POWER_SUPPLY_PROP_MODEL_NAME, 289 POWER_SUPPLY_PROP_STATUS, 290 POWER_SUPPLY_PROP_SCOPE, 291 }; 292 293 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 294 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 295 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 296 297 static const struct hid_device_id hid_battery_quirks[] = { 298 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 299 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 300 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 301 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 302 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 303 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 304 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 305 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 306 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 307 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 308 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 309 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 310 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 311 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 312 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 313 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 314 USB_DEVICE_ID_ELECOM_BM084), 315 HID_BATTERY_QUIRK_IGNORE }, 316 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 317 USB_DEVICE_ID_SYMBOL_SCANNER_3), 318 HID_BATTERY_QUIRK_IGNORE }, 319 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 320 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 321 HID_BATTERY_QUIRK_IGNORE }, 322 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 323 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 324 HID_BATTERY_QUIRK_IGNORE }, 325 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 326 HID_BATTERY_QUIRK_IGNORE }, 327 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15), 328 HID_BATTERY_QUIRK_IGNORE }, 329 {} 330 }; 331 332 static unsigned find_battery_quirk(struct hid_device *hdev) 333 { 334 unsigned quirks = 0; 335 const struct hid_device_id *match; 336 337 match = hid_match_id(hdev, hid_battery_quirks); 338 if (match != NULL) 339 quirks = match->driver_data; 340 341 return quirks; 342 } 343 344 static int hidinput_scale_battery_capacity(struct hid_device *dev, 345 int value) 346 { 347 if (dev->battery_min < dev->battery_max && 348 value >= dev->battery_min && value <= dev->battery_max) 349 value = ((value - dev->battery_min) * 100) / 350 (dev->battery_max - dev->battery_min); 351 352 return value; 353 } 354 355 static int hidinput_query_battery_capacity(struct hid_device *dev) 356 { 357 u8 *buf; 358 int ret; 359 360 buf = kmalloc(4, GFP_KERNEL); 361 if (!buf) 362 return -ENOMEM; 363 364 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 365 dev->battery_report_type, HID_REQ_GET_REPORT); 366 if (ret < 2) { 367 kfree(buf); 368 return -ENODATA; 369 } 370 371 ret = hidinput_scale_battery_capacity(dev, buf[1]); 372 kfree(buf); 373 return ret; 374 } 375 376 static int hidinput_get_battery_property(struct power_supply *psy, 377 enum power_supply_property prop, 378 union power_supply_propval *val) 379 { 380 struct hid_device *dev = power_supply_get_drvdata(psy); 381 int value; 382 int ret = 0; 383 384 switch (prop) { 385 case POWER_SUPPLY_PROP_PRESENT: 386 case POWER_SUPPLY_PROP_ONLINE: 387 val->intval = 1; 388 break; 389 390 case POWER_SUPPLY_PROP_CAPACITY: 391 if (dev->battery_status != HID_BATTERY_REPORTED && 392 !dev->battery_avoid_query) { 393 value = hidinput_query_battery_capacity(dev); 394 if (value < 0) 395 return value; 396 } else { 397 value = dev->battery_capacity; 398 } 399 400 val->intval = value; 401 break; 402 403 case POWER_SUPPLY_PROP_MODEL_NAME: 404 val->strval = dev->name; 405 break; 406 407 case POWER_SUPPLY_PROP_STATUS: 408 if (dev->battery_status != HID_BATTERY_REPORTED && 409 !dev->battery_avoid_query) { 410 value = hidinput_query_battery_capacity(dev); 411 if (value < 0) 412 return value; 413 414 dev->battery_capacity = value; 415 dev->battery_status = HID_BATTERY_QUERIED; 416 } 417 418 if (dev->battery_status == HID_BATTERY_UNKNOWN) 419 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 420 else if (dev->battery_capacity == 100) 421 val->intval = POWER_SUPPLY_STATUS_FULL; 422 else 423 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 424 break; 425 426 case POWER_SUPPLY_PROP_SCOPE: 427 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 428 break; 429 430 default: 431 ret = -EINVAL; 432 break; 433 } 434 435 return ret; 436 } 437 438 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 439 struct hid_field *field, bool is_percentage) 440 { 441 struct power_supply_desc *psy_desc; 442 struct power_supply_config psy_cfg = { .drv_data = dev, }; 443 unsigned quirks; 444 s32 min, max; 445 int error; 446 447 if (dev->battery) 448 return 0; /* already initialized? */ 449 450 quirks = find_battery_quirk(dev); 451 452 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 453 dev->bus, dev->vendor, dev->product, dev->version, quirks); 454 455 if (quirks & HID_BATTERY_QUIRK_IGNORE) 456 return 0; 457 458 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 459 if (!psy_desc) 460 return -ENOMEM; 461 462 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 463 strlen(dev->uniq) ? 464 dev->uniq : dev_name(&dev->dev)); 465 if (!psy_desc->name) { 466 error = -ENOMEM; 467 goto err_free_mem; 468 } 469 470 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 471 psy_desc->properties = hidinput_battery_props; 472 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 473 psy_desc->use_for_apm = 0; 474 psy_desc->get_property = hidinput_get_battery_property; 475 476 min = field->logical_minimum; 477 max = field->logical_maximum; 478 479 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 480 min = 0; 481 max = 100; 482 } 483 484 if (quirks & HID_BATTERY_QUIRK_FEATURE) 485 report_type = HID_FEATURE_REPORT; 486 487 dev->battery_min = min; 488 dev->battery_max = max; 489 dev->battery_report_type = report_type; 490 dev->battery_report_id = field->report->id; 491 492 /* 493 * Stylus is normally not connected to the device and thus we 494 * can't query the device and get meaningful battery strength. 495 * We have to wait for the device to report it on its own. 496 */ 497 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 498 field->physical == HID_DG_STYLUS; 499 500 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 501 if (IS_ERR(dev->battery)) { 502 error = PTR_ERR(dev->battery); 503 hid_warn(dev, "can't register power supply: %d\n", error); 504 goto err_free_name; 505 } 506 507 power_supply_powers(dev->battery, &dev->dev); 508 return 0; 509 510 err_free_name: 511 kfree(psy_desc->name); 512 err_free_mem: 513 kfree(psy_desc); 514 dev->battery = NULL; 515 return error; 516 } 517 518 static void hidinput_cleanup_battery(struct hid_device *dev) 519 { 520 const struct power_supply_desc *psy_desc; 521 522 if (!dev->battery) 523 return; 524 525 psy_desc = dev->battery->desc; 526 power_supply_unregister(dev->battery); 527 kfree(psy_desc->name); 528 kfree(psy_desc); 529 dev->battery = NULL; 530 } 531 532 static void hidinput_update_battery(struct hid_device *dev, int value) 533 { 534 int capacity; 535 536 if (!dev->battery) 537 return; 538 539 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 540 return; 541 542 capacity = hidinput_scale_battery_capacity(dev, value); 543 544 if (dev->battery_status != HID_BATTERY_REPORTED || 545 capacity != dev->battery_capacity || 546 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 547 dev->battery_capacity = capacity; 548 dev->battery_status = HID_BATTERY_REPORTED; 549 dev->battery_ratelimit_time = 550 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 551 power_supply_changed(dev->battery); 552 } 553 } 554 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 555 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 556 struct hid_field *field, bool is_percentage) 557 { 558 return 0; 559 } 560 561 static void hidinput_cleanup_battery(struct hid_device *dev) 562 { 563 } 564 565 static void hidinput_update_battery(struct hid_device *dev, int value) 566 { 567 } 568 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 569 570 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 571 struct hid_usage *usage) 572 { 573 struct input_dev *input = hidinput->input; 574 struct hid_device *device = input_get_drvdata(input); 575 int max = 0, code; 576 unsigned long *bit = NULL; 577 578 field->hidinput = hidinput; 579 580 if (field->flags & HID_MAIN_ITEM_CONSTANT) 581 goto ignore; 582 583 /* Ignore if report count is out of bounds. */ 584 if (field->report_count < 1) 585 goto ignore; 586 587 /* only LED usages are supported in output fields */ 588 if (field->report_type == HID_OUTPUT_REPORT && 589 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 590 goto ignore; 591 } 592 593 if (device->driver->input_mapping) { 594 int ret = device->driver->input_mapping(device, hidinput, field, 595 usage, &bit, &max); 596 if (ret > 0) 597 goto mapped; 598 if (ret < 0) 599 goto ignore; 600 } 601 602 switch (usage->hid & HID_USAGE_PAGE) { 603 case HID_UP_UNDEFINED: 604 goto ignore; 605 606 case HID_UP_KEYBOARD: 607 set_bit(EV_REP, input->evbit); 608 609 if ((usage->hid & HID_USAGE) < 256) { 610 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 611 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 612 } else 613 map_key(KEY_UNKNOWN); 614 615 break; 616 617 case HID_UP_BUTTON: 618 code = ((usage->hid - 1) & HID_USAGE); 619 620 switch (field->application) { 621 case HID_GD_MOUSE: 622 case HID_GD_POINTER: code += BTN_MOUSE; break; 623 case HID_GD_JOYSTICK: 624 if (code <= 0xf) 625 code += BTN_JOYSTICK; 626 else 627 code += BTN_TRIGGER_HAPPY - 0x10; 628 break; 629 case HID_GD_GAMEPAD: 630 if (code <= 0xf) 631 code += BTN_GAMEPAD; 632 else 633 code += BTN_TRIGGER_HAPPY - 0x10; 634 break; 635 default: 636 switch (field->physical) { 637 case HID_GD_MOUSE: 638 case HID_GD_POINTER: code += BTN_MOUSE; break; 639 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 640 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 641 default: code += BTN_MISC; 642 } 643 } 644 645 map_key(code); 646 break; 647 648 case HID_UP_SIMULATION: 649 switch (usage->hid & 0xffff) { 650 case 0xba: map_abs(ABS_RUDDER); break; 651 case 0xbb: map_abs(ABS_THROTTLE); break; 652 case 0xc4: map_abs(ABS_GAS); break; 653 case 0xc5: map_abs(ABS_BRAKE); break; 654 case 0xc8: map_abs(ABS_WHEEL); break; 655 default: goto ignore; 656 } 657 break; 658 659 case HID_UP_GENDESK: 660 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 661 switch (usage->hid & 0xf) { 662 case 0x1: map_key_clear(KEY_POWER); break; 663 case 0x2: map_key_clear(KEY_SLEEP); break; 664 case 0x3: map_key_clear(KEY_WAKEUP); break; 665 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 666 case 0x5: map_key_clear(KEY_MENU); break; 667 case 0x6: map_key_clear(KEY_PROG1); break; 668 case 0x7: map_key_clear(KEY_HELP); break; 669 case 0x8: map_key_clear(KEY_EXIT); break; 670 case 0x9: map_key_clear(KEY_SELECT); break; 671 case 0xa: map_key_clear(KEY_RIGHT); break; 672 case 0xb: map_key_clear(KEY_LEFT); break; 673 case 0xc: map_key_clear(KEY_UP); break; 674 case 0xd: map_key_clear(KEY_DOWN); break; 675 case 0xe: map_key_clear(KEY_POWER2); break; 676 case 0xf: map_key_clear(KEY_RESTART); break; 677 default: goto unknown; 678 } 679 break; 680 } 681 682 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 683 switch (usage->hid & 0xf) { 684 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 685 default: goto ignore; 686 } 687 break; 688 } 689 690 /* 691 * Some lazy vendors declare 255 usages for System Control, 692 * leading to the creation of ABS_X|Y axis and too many others. 693 * It wouldn't be a problem if joydev doesn't consider the 694 * device as a joystick then. 695 */ 696 if (field->application == HID_GD_SYSTEM_CONTROL) 697 goto ignore; 698 699 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 700 switch (usage->hid) { 701 case HID_GD_UP: usage->hat_dir = 1; break; 702 case HID_GD_DOWN: usage->hat_dir = 5; break; 703 case HID_GD_RIGHT: usage->hat_dir = 3; break; 704 case HID_GD_LEFT: usage->hat_dir = 7; break; 705 default: goto unknown; 706 } 707 if (field->dpad) { 708 map_abs(field->dpad); 709 goto ignore; 710 } 711 map_abs(ABS_HAT0X); 712 break; 713 } 714 715 switch (usage->hid) { 716 /* These usage IDs map directly to the usage codes. */ 717 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 718 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 719 if (field->flags & HID_MAIN_ITEM_RELATIVE) 720 map_rel(usage->hid & 0xf); 721 else 722 map_abs_clear(usage->hid & 0xf); 723 break; 724 725 case HID_GD_WHEEL: 726 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 727 set_bit(REL_WHEEL, input->relbit); 728 map_rel(REL_WHEEL_HI_RES); 729 } else { 730 map_abs(usage->hid & 0xf); 731 } 732 break; 733 case HID_GD_SLIDER: case HID_GD_DIAL: 734 if (field->flags & HID_MAIN_ITEM_RELATIVE) 735 map_rel(usage->hid & 0xf); 736 else 737 map_abs(usage->hid & 0xf); 738 break; 739 740 case HID_GD_HATSWITCH: 741 usage->hat_min = field->logical_minimum; 742 usage->hat_max = field->logical_maximum; 743 map_abs(ABS_HAT0X); 744 break; 745 746 case HID_GD_START: map_key_clear(BTN_START); break; 747 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 748 749 case HID_GD_RFKILL_BTN: 750 /* MS wireless radio ctl extension, also check CA */ 751 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 752 map_key_clear(KEY_RFKILL); 753 /* We need to simulate the btn release */ 754 field->flags |= HID_MAIN_ITEM_RELATIVE; 755 break; 756 } 757 goto unknown; 758 759 default: goto unknown; 760 } 761 762 break; 763 764 case HID_UP_LED: 765 switch (usage->hid & 0xffff) { /* HID-Value: */ 766 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 767 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 768 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 769 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 770 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 771 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 772 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 773 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 774 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 775 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 776 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 777 778 default: goto ignore; 779 } 780 break; 781 782 case HID_UP_DIGITIZER: 783 if ((field->application & 0xff) == 0x01) /* Digitizer */ 784 __set_bit(INPUT_PROP_POINTER, input->propbit); 785 else if ((field->application & 0xff) == 0x02) /* Pen */ 786 __set_bit(INPUT_PROP_DIRECT, input->propbit); 787 788 switch (usage->hid & 0xff) { 789 case 0x00: /* Undefined */ 790 goto ignore; 791 792 case 0x30: /* TipPressure */ 793 if (!test_bit(BTN_TOUCH, input->keybit)) { 794 device->quirks |= HID_QUIRK_NOTOUCH; 795 set_bit(EV_KEY, input->evbit); 796 set_bit(BTN_TOUCH, input->keybit); 797 } 798 map_abs_clear(ABS_PRESSURE); 799 break; 800 801 case 0x32: /* InRange */ 802 switch (field->physical & 0xff) { 803 case 0x21: map_key(BTN_TOOL_MOUSE); break; 804 case 0x22: map_key(BTN_TOOL_FINGER); break; 805 default: map_key(BTN_TOOL_PEN); break; 806 } 807 break; 808 809 case 0x3b: /* Battery Strength */ 810 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 811 usage->type = EV_PWR; 812 return; 813 814 case 0x3c: /* Invert */ 815 map_key_clear(BTN_TOOL_RUBBER); 816 break; 817 818 case 0x3d: /* X Tilt */ 819 map_abs_clear(ABS_TILT_X); 820 break; 821 822 case 0x3e: /* Y Tilt */ 823 map_abs_clear(ABS_TILT_Y); 824 break; 825 826 case 0x33: /* Touch */ 827 case 0x42: /* TipSwitch */ 828 case 0x43: /* TipSwitch2 */ 829 device->quirks &= ~HID_QUIRK_NOTOUCH; 830 map_key_clear(BTN_TOUCH); 831 break; 832 833 case 0x44: /* BarrelSwitch */ 834 map_key_clear(BTN_STYLUS); 835 break; 836 837 case 0x45: /* ERASER */ 838 /* 839 * This event is reported when eraser tip touches the surface. 840 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 841 * tool gets in proximity. 842 */ 843 map_key_clear(BTN_TOUCH); 844 break; 845 846 case 0x46: /* TabletPick */ 847 case 0x5a: /* SecondaryBarrelSwitch */ 848 map_key_clear(BTN_STYLUS2); 849 break; 850 851 case 0x5b: /* TransducerSerialNumber */ 852 usage->type = EV_MSC; 853 usage->code = MSC_SERIAL; 854 bit = input->mscbit; 855 max = MSC_MAX; 856 break; 857 858 default: goto unknown; 859 } 860 break; 861 862 case HID_UP_TELEPHONY: 863 switch (usage->hid & HID_USAGE) { 864 case 0x2f: map_key_clear(KEY_MICMUTE); break; 865 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 866 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 867 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 868 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 869 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 870 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 871 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 872 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 873 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 874 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 875 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 876 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 877 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 878 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 879 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 880 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 881 default: goto ignore; 882 } 883 break; 884 885 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 886 switch (usage->hid & HID_USAGE) { 887 case 0x000: goto ignore; 888 case 0x030: map_key_clear(KEY_POWER); break; 889 case 0x031: map_key_clear(KEY_RESTART); break; 890 case 0x032: map_key_clear(KEY_SLEEP); break; 891 case 0x034: map_key_clear(KEY_SLEEP); break; 892 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 893 case 0x036: map_key_clear(BTN_MISC); break; 894 895 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 896 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 897 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 898 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 899 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 900 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 901 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 902 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 903 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 904 905 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 906 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 907 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 908 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 909 case 0x069: map_key_clear(KEY_RED); break; 910 case 0x06a: map_key_clear(KEY_GREEN); break; 911 case 0x06b: map_key_clear(KEY_BLUE); break; 912 case 0x06c: map_key_clear(KEY_YELLOW); break; 913 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 914 915 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 916 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 917 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 918 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 919 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 920 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 921 922 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 923 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 924 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 925 926 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 927 case 0x083: map_key_clear(KEY_LAST); break; 928 case 0x084: map_key_clear(KEY_ENTER); break; 929 case 0x088: map_key_clear(KEY_PC); break; 930 case 0x089: map_key_clear(KEY_TV); break; 931 case 0x08a: map_key_clear(KEY_WWW); break; 932 case 0x08b: map_key_clear(KEY_DVD); break; 933 case 0x08c: map_key_clear(KEY_PHONE); break; 934 case 0x08d: map_key_clear(KEY_PROGRAM); break; 935 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 936 case 0x08f: map_key_clear(KEY_GAMES); break; 937 case 0x090: map_key_clear(KEY_MEMO); break; 938 case 0x091: map_key_clear(KEY_CD); break; 939 case 0x092: map_key_clear(KEY_VCR); break; 940 case 0x093: map_key_clear(KEY_TUNER); break; 941 case 0x094: map_key_clear(KEY_EXIT); break; 942 case 0x095: map_key_clear(KEY_HELP); break; 943 case 0x096: map_key_clear(KEY_TAPE); break; 944 case 0x097: map_key_clear(KEY_TV2); break; 945 case 0x098: map_key_clear(KEY_SAT); break; 946 case 0x09a: map_key_clear(KEY_PVR); break; 947 948 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 949 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 950 case 0x0a0: map_key_clear(KEY_VCR2); break; 951 952 case 0x0b0: map_key_clear(KEY_PLAY); break; 953 case 0x0b1: map_key_clear(KEY_PAUSE); break; 954 case 0x0b2: map_key_clear(KEY_RECORD); break; 955 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 956 case 0x0b4: map_key_clear(KEY_REWIND); break; 957 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 958 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 959 case 0x0b7: map_key_clear(KEY_STOPCD); break; 960 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 961 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 962 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 963 case 0x0bf: map_key_clear(KEY_SLOW); break; 964 965 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 966 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 967 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 968 case 0x0e2: map_key_clear(KEY_MUTE); break; 969 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 970 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 971 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 972 case 0x0f5: map_key_clear(KEY_SLOW); break; 973 974 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 975 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 976 case 0x183: map_key_clear(KEY_CONFIG); break; 977 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 978 case 0x185: map_key_clear(KEY_EDITOR); break; 979 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 980 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 981 case 0x188: map_key_clear(KEY_PRESENTATION); break; 982 case 0x189: map_key_clear(KEY_DATABASE); break; 983 case 0x18a: map_key_clear(KEY_MAIL); break; 984 case 0x18b: map_key_clear(KEY_NEWS); break; 985 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 986 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 987 case 0x18e: map_key_clear(KEY_CALENDAR); break; 988 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 989 case 0x190: map_key_clear(KEY_JOURNAL); break; 990 case 0x191: map_key_clear(KEY_FINANCE); break; 991 case 0x192: map_key_clear(KEY_CALC); break; 992 case 0x193: map_key_clear(KEY_PLAYER); break; 993 case 0x194: map_key_clear(KEY_FILE); break; 994 case 0x196: map_key_clear(KEY_WWW); break; 995 case 0x199: map_key_clear(KEY_CHAT); break; 996 case 0x19c: map_key_clear(KEY_LOGOFF); break; 997 case 0x19e: map_key_clear(KEY_COFFEE); break; 998 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 999 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1000 case 0x1a3: map_key_clear(KEY_NEXT); break; 1001 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1002 case 0x1a6: map_key_clear(KEY_HELP); break; 1003 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1004 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1005 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1006 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1007 case 0x1b4: map_key_clear(KEY_FILE); break; 1008 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1009 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1010 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1011 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1012 case 0x1bd: map_key_clear(KEY_INFO); break; 1013 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1014 case 0x201: map_key_clear(KEY_NEW); break; 1015 case 0x202: map_key_clear(KEY_OPEN); break; 1016 case 0x203: map_key_clear(KEY_CLOSE); break; 1017 case 0x204: map_key_clear(KEY_EXIT); break; 1018 case 0x207: map_key_clear(KEY_SAVE); break; 1019 case 0x208: map_key_clear(KEY_PRINT); break; 1020 case 0x209: map_key_clear(KEY_PROPS); break; 1021 case 0x21a: map_key_clear(KEY_UNDO); break; 1022 case 0x21b: map_key_clear(KEY_COPY); break; 1023 case 0x21c: map_key_clear(KEY_CUT); break; 1024 case 0x21d: map_key_clear(KEY_PASTE); break; 1025 case 0x21f: map_key_clear(KEY_FIND); break; 1026 case 0x221: map_key_clear(KEY_SEARCH); break; 1027 case 0x222: map_key_clear(KEY_GOTO); break; 1028 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1029 case 0x224: map_key_clear(KEY_BACK); break; 1030 case 0x225: map_key_clear(KEY_FORWARD); break; 1031 case 0x226: map_key_clear(KEY_STOP); break; 1032 case 0x227: map_key_clear(KEY_REFRESH); break; 1033 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1034 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1035 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1036 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1037 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1038 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1039 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1040 case 0x238: /* AC Pan */ 1041 set_bit(REL_HWHEEL, input->relbit); 1042 map_rel(REL_HWHEEL_HI_RES); 1043 break; 1044 case 0x23d: map_key_clear(KEY_EDIT); break; 1045 case 0x25f: map_key_clear(KEY_CANCEL); break; 1046 case 0x269: map_key_clear(KEY_INSERT); break; 1047 case 0x26a: map_key_clear(KEY_DELETE); break; 1048 case 0x279: map_key_clear(KEY_REDO); break; 1049 1050 case 0x289: map_key_clear(KEY_REPLY); break; 1051 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1052 case 0x28c: map_key_clear(KEY_SEND); break; 1053 1054 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1055 1056 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1057 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1058 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1059 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1060 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1061 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1062 1063 case 0x29f: map_key_clear(KEY_SCALE); break; 1064 1065 default: map_key_clear(KEY_UNKNOWN); 1066 } 1067 break; 1068 1069 case HID_UP_GENDEVCTRLS: 1070 switch (usage->hid) { 1071 case HID_DC_BATTERYSTRENGTH: 1072 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1073 usage->type = EV_PWR; 1074 return; 1075 } 1076 goto unknown; 1077 1078 case HID_UP_BATTERY: 1079 switch (usage->hid) { 1080 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1081 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1082 usage->type = EV_PWR; 1083 return; 1084 } 1085 goto unknown; 1086 1087 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1088 set_bit(EV_REP, input->evbit); 1089 switch (usage->hid & HID_USAGE) { 1090 case 0x021: map_key_clear(KEY_PRINT); break; 1091 case 0x070: map_key_clear(KEY_HP); break; 1092 case 0x071: map_key_clear(KEY_CAMERA); break; 1093 case 0x072: map_key_clear(KEY_SOUND); break; 1094 case 0x073: map_key_clear(KEY_QUESTION); break; 1095 case 0x080: map_key_clear(KEY_EMAIL); break; 1096 case 0x081: map_key_clear(KEY_CHAT); break; 1097 case 0x082: map_key_clear(KEY_SEARCH); break; 1098 case 0x083: map_key_clear(KEY_CONNECT); break; 1099 case 0x084: map_key_clear(KEY_FINANCE); break; 1100 case 0x085: map_key_clear(KEY_SPORT); break; 1101 case 0x086: map_key_clear(KEY_SHOP); break; 1102 default: goto ignore; 1103 } 1104 break; 1105 1106 case HID_UP_HPVENDOR2: 1107 set_bit(EV_REP, input->evbit); 1108 switch (usage->hid & HID_USAGE) { 1109 case 0x001: map_key_clear(KEY_MICMUTE); break; 1110 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1111 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1112 default: goto ignore; 1113 } 1114 break; 1115 1116 case HID_UP_MSVENDOR: 1117 goto ignore; 1118 1119 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1120 set_bit(EV_REP, input->evbit); 1121 goto ignore; 1122 1123 case HID_UP_LOGIVENDOR: 1124 /* intentional fallback */ 1125 case HID_UP_LOGIVENDOR2: 1126 /* intentional fallback */ 1127 case HID_UP_LOGIVENDOR3: 1128 goto ignore; 1129 1130 case HID_UP_PID: 1131 switch (usage->hid & HID_USAGE) { 1132 case 0xa4: map_key_clear(BTN_DEAD); break; 1133 default: goto ignore; 1134 } 1135 break; 1136 1137 default: 1138 unknown: 1139 if (field->report_size == 1) { 1140 if (field->report->type == HID_OUTPUT_REPORT) { 1141 map_led(LED_MISC); 1142 break; 1143 } 1144 map_key(BTN_MISC); 1145 break; 1146 } 1147 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1148 map_rel(REL_MISC); 1149 break; 1150 } 1151 map_abs(ABS_MISC); 1152 break; 1153 } 1154 1155 mapped: 1156 /* Mapping failed, bail out */ 1157 if (!bit) 1158 return; 1159 1160 if (device->driver->input_mapped && 1161 device->driver->input_mapped(device, hidinput, field, usage, 1162 &bit, &max) < 0) { 1163 /* 1164 * The driver indicated that no further generic handling 1165 * of the usage is desired. 1166 */ 1167 return; 1168 } 1169 1170 set_bit(usage->type, input->evbit); 1171 1172 /* 1173 * This part is *really* controversial: 1174 * - HID aims at being generic so we should do our best to export 1175 * all incoming events 1176 * - HID describes what events are, so there is no reason for ABS_X 1177 * to be mapped to ABS_Y 1178 * - HID is using *_MISC+N as a default value, but nothing prevents 1179 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1180 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1181 * processing) 1182 * 1183 * If devices still want to use this (at their own risk), they will 1184 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1185 * the default should be a reliable mapping. 1186 */ 1187 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1188 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1189 usage->code = find_next_zero_bit(bit, 1190 max + 1, 1191 usage->code); 1192 } else { 1193 device->status |= HID_STAT_DUP_DETECTED; 1194 goto ignore; 1195 } 1196 } 1197 1198 if (usage->code > max) 1199 goto ignore; 1200 1201 if (usage->type == EV_ABS) { 1202 1203 int a = field->logical_minimum; 1204 int b = field->logical_maximum; 1205 1206 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1207 a = field->logical_minimum = 0; 1208 b = field->logical_maximum = 255; 1209 } 1210 1211 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1212 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1213 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1214 1215 input_abs_set_res(input, usage->code, 1216 hidinput_calc_abs_res(field, usage->code)); 1217 1218 /* use a larger default input buffer for MT devices */ 1219 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1220 input_set_events_per_packet(input, 60); 1221 } 1222 1223 if (usage->type == EV_ABS && 1224 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1225 int i; 1226 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1227 input_set_abs_params(input, i, -1, 1, 0, 0); 1228 set_bit(i, input->absbit); 1229 } 1230 if (usage->hat_dir && !field->dpad) 1231 field->dpad = usage->code; 1232 } 1233 1234 /* for those devices which produce Consumer volume usage as relative, 1235 * we emulate pressing volumeup/volumedown appropriate number of times 1236 * in hidinput_hid_event() 1237 */ 1238 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1239 (usage->code == ABS_VOLUME)) { 1240 set_bit(KEY_VOLUMEUP, input->keybit); 1241 set_bit(KEY_VOLUMEDOWN, input->keybit); 1242 } 1243 1244 if (usage->type == EV_KEY) { 1245 set_bit(EV_MSC, input->evbit); 1246 set_bit(MSC_SCAN, input->mscbit); 1247 } 1248 1249 return; 1250 1251 ignore: 1252 usage->type = 0; 1253 usage->code = 0; 1254 } 1255 1256 static void hidinput_handle_scroll(struct hid_usage *usage, 1257 struct input_dev *input, 1258 __s32 value) 1259 { 1260 int code; 1261 int hi_res, lo_res; 1262 1263 if (value == 0) 1264 return; 1265 1266 if (usage->code == REL_WHEEL_HI_RES) 1267 code = REL_WHEEL; 1268 else 1269 code = REL_HWHEEL; 1270 1271 /* 1272 * Windows reports one wheel click as value 120. Where a high-res 1273 * scroll wheel is present, a fraction of 120 is reported instead. 1274 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1275 * adhere to the 120 expectation. 1276 */ 1277 hi_res = value * 120/usage->resolution_multiplier; 1278 1279 usage->wheel_accumulated += hi_res; 1280 lo_res = usage->wheel_accumulated/120; 1281 if (lo_res) 1282 usage->wheel_accumulated -= lo_res * 120; 1283 1284 input_event(input, EV_REL, code, lo_res); 1285 input_event(input, EV_REL, usage->code, hi_res); 1286 } 1287 1288 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1289 { 1290 struct input_dev *input; 1291 unsigned *quirks = &hid->quirks; 1292 1293 if (!usage->type) 1294 return; 1295 1296 if (usage->type == EV_PWR) { 1297 hidinput_update_battery(hid, value); 1298 return; 1299 } 1300 1301 if (!field->hidinput) 1302 return; 1303 1304 input = field->hidinput->input; 1305 1306 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1307 int hat_dir = usage->hat_dir; 1308 if (!hat_dir) 1309 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1310 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1311 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1312 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1313 return; 1314 } 1315 1316 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */ 1317 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); 1318 return; 1319 } 1320 1321 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */ 1322 if (value) { 1323 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); 1324 return; 1325 } 1326 input_event(input, usage->type, usage->code, 0); 1327 input_event(input, usage->type, BTN_TOOL_RUBBER, 0); 1328 return; 1329 } 1330 1331 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */ 1332 int a = field->logical_minimum; 1333 int b = field->logical_maximum; 1334 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); 1335 } 1336 1337 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ 1338 dbg_hid("Maximum Effects - %d\n",value); 1339 return; 1340 } 1341 1342 if (usage->hid == (HID_UP_PID | 0x7fUL)) { 1343 dbg_hid("PID Pool Report\n"); 1344 return; 1345 } 1346 1347 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1348 return; 1349 1350 if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES || 1351 usage->code == REL_HWHEEL_HI_RES)) { 1352 hidinput_handle_scroll(usage, input, value); 1353 return; 1354 } 1355 1356 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1357 (usage->code == ABS_VOLUME)) { 1358 int count = abs(value); 1359 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1360 int i; 1361 1362 for (i = 0; i < count; i++) { 1363 input_event(input, EV_KEY, direction, 1); 1364 input_sync(input); 1365 input_event(input, EV_KEY, direction, 0); 1366 input_sync(input); 1367 } 1368 return; 1369 } 1370 1371 /* 1372 * Ignore out-of-range values as per HID specification, 1373 * section 5.10 and 6.2.25, when NULL state bit is present. 1374 * When it's not, clamp the value to match Microsoft's input 1375 * driver as mentioned in "Required HID usages for digitizers": 1376 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1377 * 1378 * The logical_minimum < logical_maximum check is done so that we 1379 * don't unintentionally discard values sent by devices which 1380 * don't specify logical min and max. 1381 */ 1382 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1383 (field->logical_minimum < field->logical_maximum)) { 1384 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1385 (value < field->logical_minimum || 1386 value > field->logical_maximum)) { 1387 dbg_hid("Ignoring out-of-range value %x\n", value); 1388 return; 1389 } 1390 value = clamp(value, 1391 field->logical_minimum, 1392 field->logical_maximum); 1393 } 1394 1395 /* 1396 * Ignore reports for absolute data if the data didn't change. This is 1397 * not only an optimization but also fixes 'dead' key reports. Some 1398 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1399 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1400 * can only have one of them physically available. The 'dead' keys 1401 * report constant 0. As all map to the same keycode, they'd confuse 1402 * the input layer. If we filter the 'dead' keys on the HID level, we 1403 * skip the keycode translation and only forward real events. 1404 */ 1405 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1406 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1407 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1408 usage->usage_index < field->maxusage && 1409 value == field->value[usage->usage_index]) 1410 return; 1411 1412 /* report the usage code as scancode if the key status has changed */ 1413 if (usage->type == EV_KEY && 1414 (!test_bit(usage->code, input->key)) == value) 1415 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1416 1417 input_event(input, usage->type, usage->code, value); 1418 1419 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1420 usage->type == EV_KEY && value) { 1421 input_sync(input); 1422 input_event(input, usage->type, usage->code, 0); 1423 } 1424 } 1425 1426 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1427 { 1428 struct hid_input *hidinput; 1429 1430 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1431 return; 1432 1433 list_for_each_entry(hidinput, &hid->inputs, list) 1434 input_sync(hidinput->input); 1435 } 1436 EXPORT_SYMBOL_GPL(hidinput_report_event); 1437 1438 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field) 1439 { 1440 struct hid_report *report; 1441 int i, j; 1442 1443 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1444 for (i = 0; i < report->maxfield; i++) { 1445 *field = report->field[i]; 1446 for (j = 0; j < (*field)->maxusage; j++) 1447 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1448 return j; 1449 } 1450 } 1451 return -1; 1452 } 1453 EXPORT_SYMBOL_GPL(hidinput_find_field); 1454 1455 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1456 { 1457 struct hid_report *report; 1458 struct hid_field *field; 1459 int i, j; 1460 1461 list_for_each_entry(report, 1462 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1463 list) { 1464 for (i = 0; i < report->maxfield; i++) { 1465 field = report->field[i]; 1466 for (j = 0; j < field->maxusage; j++) 1467 if (field->usage[j].type == EV_LED) 1468 return field; 1469 } 1470 } 1471 return NULL; 1472 } 1473 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1474 1475 unsigned int hidinput_count_leds(struct hid_device *hid) 1476 { 1477 struct hid_report *report; 1478 struct hid_field *field; 1479 int i, j; 1480 unsigned int count = 0; 1481 1482 list_for_each_entry(report, 1483 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1484 list) { 1485 for (i = 0; i < report->maxfield; i++) { 1486 field = report->field[i]; 1487 for (j = 0; j < field->maxusage; j++) 1488 if (field->usage[j].type == EV_LED && 1489 field->value[j]) 1490 count += 1; 1491 } 1492 } 1493 return count; 1494 } 1495 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1496 1497 static void hidinput_led_worker(struct work_struct *work) 1498 { 1499 struct hid_device *hid = container_of(work, struct hid_device, 1500 led_work); 1501 struct hid_field *field; 1502 struct hid_report *report; 1503 int ret; 1504 u32 len; 1505 __u8 *buf; 1506 1507 field = hidinput_get_led_field(hid); 1508 if (!field) 1509 return; 1510 1511 /* 1512 * field->report is accessed unlocked regarding HID core. So there might 1513 * be another incoming SET-LED request from user-space, which changes 1514 * the LED state while we assemble our outgoing buffer. However, this 1515 * doesn't matter as hid_output_report() correctly converts it into a 1516 * boolean value no matter what information is currently set on the LED 1517 * field (even garbage). So the remote device will always get a valid 1518 * request. 1519 * And in case we send a wrong value, a next led worker is spawned 1520 * for every SET-LED request so the following worker will send the 1521 * correct value, guaranteed! 1522 */ 1523 1524 report = field->report; 1525 1526 /* use custom SET_REPORT request if possible (asynchronous) */ 1527 if (hid->ll_driver->request) 1528 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1529 1530 /* fall back to generic raw-output-report */ 1531 len = hid_report_len(report); 1532 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1533 if (!buf) 1534 return; 1535 1536 hid_output_report(report, buf); 1537 /* synchronous output report */ 1538 ret = hid_hw_output_report(hid, buf, len); 1539 if (ret == -ENOSYS) 1540 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1541 HID_REQ_SET_REPORT); 1542 kfree(buf); 1543 } 1544 1545 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1546 unsigned int code, int value) 1547 { 1548 struct hid_device *hid = input_get_drvdata(dev); 1549 struct hid_field *field; 1550 int offset; 1551 1552 if (type == EV_FF) 1553 return input_ff_event(dev, type, code, value); 1554 1555 if (type != EV_LED) 1556 return -1; 1557 1558 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1559 hid_warn(dev, "event field not found\n"); 1560 return -1; 1561 } 1562 1563 hid_set_field(field, offset, value); 1564 1565 schedule_work(&hid->led_work); 1566 return 0; 1567 } 1568 1569 static int hidinput_open(struct input_dev *dev) 1570 { 1571 struct hid_device *hid = input_get_drvdata(dev); 1572 1573 return hid_hw_open(hid); 1574 } 1575 1576 static void hidinput_close(struct input_dev *dev) 1577 { 1578 struct hid_device *hid = input_get_drvdata(dev); 1579 1580 hid_hw_close(hid); 1581 } 1582 1583 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1584 struct hid_report *report, bool use_logical_max) 1585 { 1586 struct hid_usage *usage; 1587 bool update_needed = false; 1588 bool get_report_completed = false; 1589 int i, j; 1590 1591 if (report->maxfield == 0) 1592 return false; 1593 1594 for (i = 0; i < report->maxfield; i++) { 1595 __s32 value = use_logical_max ? 1596 report->field[i]->logical_maximum : 1597 report->field[i]->logical_minimum; 1598 1599 /* There is no good reason for a Resolution 1600 * Multiplier to have a count other than 1. 1601 * Ignore that case. 1602 */ 1603 if (report->field[i]->report_count != 1) 1604 continue; 1605 1606 for (j = 0; j < report->field[i]->maxusage; j++) { 1607 usage = &report->field[i]->usage[j]; 1608 1609 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1610 continue; 1611 1612 /* 1613 * If we have more than one feature within this 1614 * report we need to fill in the bits from the 1615 * others before we can overwrite the ones for the 1616 * Resolution Multiplier. 1617 * 1618 * But if we're not allowed to read from the device, 1619 * we just bail. Such a device should not exist 1620 * anyway. 1621 */ 1622 if (!get_report_completed && report->maxfield > 1) { 1623 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1624 return update_needed; 1625 1626 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1627 hid_hw_wait(hid); 1628 get_report_completed = true; 1629 } 1630 1631 report->field[i]->value[j] = value; 1632 update_needed = true; 1633 } 1634 } 1635 1636 return update_needed; 1637 } 1638 1639 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1640 { 1641 struct hid_report_enum *rep_enum; 1642 struct hid_report *rep; 1643 int ret; 1644 1645 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1646 list_for_each_entry(rep, &rep_enum->report_list, list) { 1647 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1648 rep, true); 1649 1650 if (update_needed) { 1651 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1652 if (ret) { 1653 __hidinput_change_resolution_multipliers(hid, 1654 rep, false); 1655 return; 1656 } 1657 } 1658 } 1659 1660 /* refresh our structs */ 1661 hid_setup_resolution_multiplier(hid); 1662 } 1663 1664 static void report_features(struct hid_device *hid) 1665 { 1666 struct hid_driver *drv = hid->driver; 1667 struct hid_report_enum *rep_enum; 1668 struct hid_report *rep; 1669 struct hid_usage *usage; 1670 int i, j; 1671 1672 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1673 list_for_each_entry(rep, &rep_enum->report_list, list) 1674 for (i = 0; i < rep->maxfield; i++) { 1675 /* Ignore if report count is out of bounds. */ 1676 if (rep->field[i]->report_count < 1) 1677 continue; 1678 1679 for (j = 0; j < rep->field[i]->maxusage; j++) { 1680 usage = &rep->field[i]->usage[j]; 1681 1682 /* Verify if Battery Strength feature is available */ 1683 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1684 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1685 rep->field[i], false); 1686 1687 if (drv->feature_mapping) 1688 drv->feature_mapping(hid, rep->field[i], usage); 1689 } 1690 } 1691 } 1692 1693 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1694 unsigned int application) 1695 { 1696 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1697 struct input_dev *input_dev = input_allocate_device(); 1698 const char *suffix = NULL; 1699 size_t suffix_len, name_len; 1700 1701 if (!hidinput || !input_dev) 1702 goto fail; 1703 1704 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1705 hid->maxapplication > 1) { 1706 switch (application) { 1707 case HID_GD_KEYBOARD: 1708 suffix = "Keyboard"; 1709 break; 1710 case HID_GD_KEYPAD: 1711 suffix = "Keypad"; 1712 break; 1713 case HID_GD_MOUSE: 1714 suffix = "Mouse"; 1715 break; 1716 case HID_DG_STYLUS: 1717 suffix = "Pen"; 1718 break; 1719 case HID_DG_TOUCHSCREEN: 1720 suffix = "Touchscreen"; 1721 break; 1722 case HID_DG_TOUCHPAD: 1723 suffix = "Touchpad"; 1724 break; 1725 case HID_GD_SYSTEM_CONTROL: 1726 suffix = "System Control"; 1727 break; 1728 case HID_CP_CONSUMER_CONTROL: 1729 suffix = "Consumer Control"; 1730 break; 1731 case HID_GD_WIRELESS_RADIO_CTLS: 1732 suffix = "Wireless Radio Control"; 1733 break; 1734 case HID_GD_SYSTEM_MULTIAXIS: 1735 suffix = "System Multi Axis"; 1736 break; 1737 default: 1738 break; 1739 } 1740 } 1741 1742 if (suffix) { 1743 name_len = strlen(hid->name); 1744 suffix_len = strlen(suffix); 1745 if ((name_len < suffix_len) || 1746 strcmp(hid->name + name_len - suffix_len, suffix)) { 1747 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1748 hid->name, suffix); 1749 if (!hidinput->name) 1750 goto fail; 1751 } 1752 } 1753 1754 input_set_drvdata(input_dev, hid); 1755 input_dev->event = hidinput_input_event; 1756 input_dev->open = hidinput_open; 1757 input_dev->close = hidinput_close; 1758 input_dev->setkeycode = hidinput_setkeycode; 1759 input_dev->getkeycode = hidinput_getkeycode; 1760 1761 input_dev->name = hidinput->name ? hidinput->name : hid->name; 1762 input_dev->phys = hid->phys; 1763 input_dev->uniq = hid->uniq; 1764 input_dev->id.bustype = hid->bus; 1765 input_dev->id.vendor = hid->vendor; 1766 input_dev->id.product = hid->product; 1767 input_dev->id.version = hid->version; 1768 input_dev->dev.parent = &hid->dev; 1769 1770 hidinput->input = input_dev; 1771 hidinput->application = application; 1772 list_add_tail(&hidinput->list, &hid->inputs); 1773 1774 INIT_LIST_HEAD(&hidinput->reports); 1775 1776 return hidinput; 1777 1778 fail: 1779 kfree(hidinput); 1780 input_free_device(input_dev); 1781 hid_err(hid, "Out of memory during hid input probe\n"); 1782 return NULL; 1783 } 1784 1785 static bool hidinput_has_been_populated(struct hid_input *hidinput) 1786 { 1787 int i; 1788 unsigned long r = 0; 1789 1790 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 1791 r |= hidinput->input->evbit[i]; 1792 1793 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 1794 r |= hidinput->input->keybit[i]; 1795 1796 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 1797 r |= hidinput->input->relbit[i]; 1798 1799 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 1800 r |= hidinput->input->absbit[i]; 1801 1802 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 1803 r |= hidinput->input->mscbit[i]; 1804 1805 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 1806 r |= hidinput->input->ledbit[i]; 1807 1808 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 1809 r |= hidinput->input->sndbit[i]; 1810 1811 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 1812 r |= hidinput->input->ffbit[i]; 1813 1814 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 1815 r |= hidinput->input->swbit[i]; 1816 1817 return !!r; 1818 } 1819 1820 static void hidinput_cleanup_hidinput(struct hid_device *hid, 1821 struct hid_input *hidinput) 1822 { 1823 struct hid_report *report; 1824 int i, k; 1825 1826 list_del(&hidinput->list); 1827 input_free_device(hidinput->input); 1828 kfree(hidinput->name); 1829 1830 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1831 if (k == HID_OUTPUT_REPORT && 1832 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1833 continue; 1834 1835 list_for_each_entry(report, &hid->report_enum[k].report_list, 1836 list) { 1837 1838 for (i = 0; i < report->maxfield; i++) 1839 if (report->field[i]->hidinput == hidinput) 1840 report->field[i]->hidinput = NULL; 1841 } 1842 } 1843 1844 kfree(hidinput); 1845 } 1846 1847 static struct hid_input *hidinput_match(struct hid_report *report) 1848 { 1849 struct hid_device *hid = report->device; 1850 struct hid_input *hidinput; 1851 1852 list_for_each_entry(hidinput, &hid->inputs, list) { 1853 if (hidinput->report && 1854 hidinput->report->id == report->id) 1855 return hidinput; 1856 } 1857 1858 return NULL; 1859 } 1860 1861 static struct hid_input *hidinput_match_application(struct hid_report *report) 1862 { 1863 struct hid_device *hid = report->device; 1864 struct hid_input *hidinput; 1865 1866 list_for_each_entry(hidinput, &hid->inputs, list) { 1867 if (hidinput->application == report->application) 1868 return hidinput; 1869 1870 /* 1871 * Keep SystemControl and ConsumerControl applications together 1872 * with the main keyboard, if present. 1873 */ 1874 if ((report->application == HID_GD_SYSTEM_CONTROL || 1875 report->application == HID_CP_CONSUMER_CONTROL) && 1876 hidinput->application == HID_GD_KEYBOARD) { 1877 return hidinput; 1878 } 1879 } 1880 1881 return NULL; 1882 } 1883 1884 static inline void hidinput_configure_usages(struct hid_input *hidinput, 1885 struct hid_report *report) 1886 { 1887 int i, j; 1888 1889 for (i = 0; i < report->maxfield; i++) 1890 for (j = 0; j < report->field[i]->maxusage; j++) 1891 hidinput_configure_usage(hidinput, report->field[i], 1892 report->field[i]->usage + j); 1893 } 1894 1895 /* 1896 * Register the input device; print a message. 1897 * Configure the input layer interface 1898 * Read all reports and initialize the absolute field values. 1899 */ 1900 1901 int hidinput_connect(struct hid_device *hid, unsigned int force) 1902 { 1903 struct hid_driver *drv = hid->driver; 1904 struct hid_report *report; 1905 struct hid_input *next, *hidinput = NULL; 1906 unsigned int application; 1907 int i, k; 1908 1909 INIT_LIST_HEAD(&hid->inputs); 1910 INIT_WORK(&hid->led_work, hidinput_led_worker); 1911 1912 hid->status &= ~HID_STAT_DUP_DETECTED; 1913 1914 if (!force) { 1915 for (i = 0; i < hid->maxcollection; i++) { 1916 struct hid_collection *col = &hid->collection[i]; 1917 if (col->type == HID_COLLECTION_APPLICATION || 1918 col->type == HID_COLLECTION_PHYSICAL) 1919 if (IS_INPUT_APPLICATION(col->usage)) 1920 break; 1921 } 1922 1923 if (i == hid->maxcollection) 1924 return -1; 1925 } 1926 1927 report_features(hid); 1928 1929 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1930 if (k == HID_OUTPUT_REPORT && 1931 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1932 continue; 1933 1934 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1935 1936 if (!report->maxfield) 1937 continue; 1938 1939 application = report->application; 1940 1941 /* 1942 * Find the previous hidinput report attached 1943 * to this report id. 1944 */ 1945 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1946 hidinput = hidinput_match(report); 1947 else if (hid->maxapplication > 1 && 1948 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 1949 hidinput = hidinput_match_application(report); 1950 1951 if (!hidinput) { 1952 hidinput = hidinput_allocate(hid, application); 1953 if (!hidinput) 1954 goto out_unwind; 1955 } 1956 1957 hidinput_configure_usages(hidinput, report); 1958 1959 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 1960 hidinput->report = report; 1961 1962 list_add_tail(&report->hidinput_list, 1963 &hidinput->reports); 1964 } 1965 } 1966 1967 hidinput_change_resolution_multipliers(hid); 1968 1969 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1970 if (drv->input_configured && 1971 drv->input_configured(hid, hidinput)) 1972 goto out_unwind; 1973 1974 if (!hidinput_has_been_populated(hidinput)) { 1975 /* no need to register an input device not populated */ 1976 hidinput_cleanup_hidinput(hid, hidinput); 1977 continue; 1978 } 1979 1980 if (input_register_device(hidinput->input)) 1981 goto out_unwind; 1982 hidinput->registered = true; 1983 } 1984 1985 if (list_empty(&hid->inputs)) { 1986 hid_err(hid, "No inputs registered, leaving\n"); 1987 goto out_unwind; 1988 } 1989 1990 if (hid->status & HID_STAT_DUP_DETECTED) 1991 hid_dbg(hid, 1992 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 1993 1994 return 0; 1995 1996 out_unwind: 1997 /* unwind the ones we already registered */ 1998 hidinput_disconnect(hid); 1999 2000 return -1; 2001 } 2002 EXPORT_SYMBOL_GPL(hidinput_connect); 2003 2004 void hidinput_disconnect(struct hid_device *hid) 2005 { 2006 struct hid_input *hidinput, *next; 2007 2008 hidinput_cleanup_battery(hid); 2009 2010 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2011 list_del(&hidinput->list); 2012 if (hidinput->registered) 2013 input_unregister_device(hidinput->input); 2014 else 2015 input_free_device(hidinput->input); 2016 kfree(hidinput->name); 2017 kfree(hidinput); 2018 } 2019 2020 /* led_work is spawned by input_dev callbacks, but doesn't access the 2021 * parent input_dev at all. Once all input devices are removed, we 2022 * know that led_work will never get restarted, so we can cancel it 2023 * synchronously and are safe. */ 2024 cancel_work_sync(&hid->led_work); 2025 } 2026 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2027