1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2000-2001 Vojtech Pavlik 4 * Copyright (c) 2006-2010 Jiri Kosina 5 * 6 * HID to Linux Input mapping 7 */ 8 9 /* 10 * 11 * Should you need to contact me, the author, you can do so either by 12 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 13 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 14 */ 15 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/kernel.h> 19 20 #include <linux/hid.h> 21 #include <linux/hid-debug.h> 22 23 #include "hid-ids.h" 24 25 #define unk KEY_UNKNOWN 26 27 static const unsigned char hid_keyboard[256] = { 28 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 29 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 30 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 31 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 32 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 33 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 34 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 35 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 36 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk, 37 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk, 38 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 39 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk, 40 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 41 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk, 42 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 43 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk 44 }; 45 46 static const struct { 47 __s32 x; 48 __s32 y; 49 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 50 51 struct usage_priority { 52 __u32 usage; /* the HID usage associated */ 53 bool global; /* we assume all usages to be slotted, 54 * unless global 55 */ 56 unsigned int slot_overwrite; /* for globals: allows to set the usage 57 * before or after the slots 58 */ 59 }; 60 61 /* 62 * hid-input will convert this list into priorities: 63 * the first element will have the highest priority 64 * (the length of the following array) and the last 65 * element the lowest (1). 66 * 67 * hid-input will then shift the priority by 8 bits to leave some space 68 * in case drivers want to interleave other fields. 69 * 70 * To accommodate slotted devices, the slot priority is 71 * defined in the next 8 bits (defined by 0xff - slot). 72 * 73 * If drivers want to add fields before those, hid-input will 74 * leave out the first 8 bits of the priority value. 75 * 76 * This still leaves us 65535 individual priority values. 77 */ 78 static const struct usage_priority hidinput_usages_priorities[] = { 79 { /* Eraser (eraser touching) must always come before tipswitch */ 80 .usage = HID_DG_ERASER, 81 }, 82 { /* Invert must always come before In Range */ 83 .usage = HID_DG_INVERT, 84 }, 85 { /* Is the tip of the tool touching? */ 86 .usage = HID_DG_TIPSWITCH, 87 }, 88 { /* Tip Pressure might emulate tip switch */ 89 .usage = HID_DG_TIPPRESSURE, 90 }, 91 { /* In Range needs to come after the other tool states */ 92 .usage = HID_DG_INRANGE, 93 }, 94 }; 95 96 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) 97 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) 98 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) 99 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c)) 100 #define map_msc(c) hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c)) 101 102 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 103 &max, EV_ABS, (c)) 104 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 105 &max, EV_KEY, (c)) 106 107 static bool match_scancode(struct hid_usage *usage, 108 unsigned int cur_idx, unsigned int scancode) 109 { 110 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode; 111 } 112 113 static bool match_keycode(struct hid_usage *usage, 114 unsigned int cur_idx, unsigned int keycode) 115 { 116 /* 117 * We should exclude unmapped usages when doing lookup by keycode. 118 */ 119 return (usage->type == EV_KEY && usage->code == keycode); 120 } 121 122 static bool match_index(struct hid_usage *usage, 123 unsigned int cur_idx, unsigned int idx) 124 { 125 return cur_idx == idx; 126 } 127 128 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage, 129 unsigned int cur_idx, unsigned int val); 130 131 static struct hid_usage *hidinput_find_key(struct hid_device *hid, 132 hid_usage_cmp_t match, 133 unsigned int value, 134 unsigned int *usage_idx) 135 { 136 unsigned int i, j, k, cur_idx = 0; 137 struct hid_report *report; 138 struct hid_usage *usage; 139 140 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 141 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 142 for (i = 0; i < report->maxfield; i++) { 143 for (j = 0; j < report->field[i]->maxusage; j++) { 144 usage = report->field[i]->usage + j; 145 if (usage->type == EV_KEY || usage->type == 0) { 146 if (match(usage, cur_idx, value)) { 147 if (usage_idx) 148 *usage_idx = cur_idx; 149 return usage; 150 } 151 cur_idx++; 152 } 153 } 154 } 155 } 156 } 157 return NULL; 158 } 159 160 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid, 161 const struct input_keymap_entry *ke, 162 unsigned int *index) 163 { 164 struct hid_usage *usage; 165 unsigned int scancode; 166 167 if (ke->flags & INPUT_KEYMAP_BY_INDEX) 168 usage = hidinput_find_key(hid, match_index, ke->index, index); 169 else if (input_scancode_to_scalar(ke, &scancode) == 0) 170 usage = hidinput_find_key(hid, match_scancode, scancode, index); 171 else 172 usage = NULL; 173 174 return usage; 175 } 176 177 static int hidinput_getkeycode(struct input_dev *dev, 178 struct input_keymap_entry *ke) 179 { 180 struct hid_device *hid = input_get_drvdata(dev); 181 struct hid_usage *usage; 182 unsigned int scancode, index; 183 184 usage = hidinput_locate_usage(hid, ke, &index); 185 if (usage) { 186 ke->keycode = usage->type == EV_KEY ? 187 usage->code : KEY_RESERVED; 188 ke->index = index; 189 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE); 190 ke->len = sizeof(scancode); 191 memcpy(ke->scancode, &scancode, sizeof(scancode)); 192 return 0; 193 } 194 195 return -EINVAL; 196 } 197 198 static int hidinput_setkeycode(struct input_dev *dev, 199 const struct input_keymap_entry *ke, 200 unsigned int *old_keycode) 201 { 202 struct hid_device *hid = input_get_drvdata(dev); 203 struct hid_usage *usage; 204 205 usage = hidinput_locate_usage(hid, ke, NULL); 206 if (usage) { 207 *old_keycode = usage->type == EV_KEY ? 208 usage->code : KEY_RESERVED; 209 usage->type = EV_KEY; 210 usage->code = ke->keycode; 211 212 clear_bit(*old_keycode, dev->keybit); 213 set_bit(usage->code, dev->keybit); 214 dbg_hid("Assigned keycode %d to HID usage code %x\n", 215 usage->code, usage->hid); 216 217 /* 218 * Set the keybit for the old keycode if the old keycode is used 219 * by another key 220 */ 221 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 222 set_bit(*old_keycode, dev->keybit); 223 224 return 0; 225 } 226 227 return -EINVAL; 228 } 229 230 231 /** 232 * hidinput_calc_abs_res - calculate an absolute axis resolution 233 * @field: the HID report field to calculate resolution for 234 * @code: axis code 235 * 236 * The formula is: 237 * (logical_maximum - logical_minimum) 238 * resolution = ---------------------------------------------------------- 239 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 240 * 241 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 242 * 243 * Only exponent 1 length units are processed. Centimeters and inches are 244 * converted to millimeters. Degrees are converted to radians. 245 */ 246 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 247 { 248 __s32 unit_exponent = field->unit_exponent; 249 __s32 logical_extents = field->logical_maximum - 250 field->logical_minimum; 251 __s32 physical_extents = field->physical_maximum - 252 field->physical_minimum; 253 __s32 prev; 254 255 /* Check if the extents are sane */ 256 if (logical_extents <= 0 || physical_extents <= 0) 257 return 0; 258 259 /* 260 * Verify and convert units. 261 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 262 */ 263 switch (code) { 264 case ABS_X: 265 case ABS_Y: 266 case ABS_Z: 267 case ABS_MT_POSITION_X: 268 case ABS_MT_POSITION_Y: 269 case ABS_MT_TOOL_X: 270 case ABS_MT_TOOL_Y: 271 case ABS_MT_TOUCH_MAJOR: 272 case ABS_MT_TOUCH_MINOR: 273 if (field->unit == 0x11) { /* If centimeters */ 274 /* Convert to millimeters */ 275 unit_exponent += 1; 276 } else if (field->unit == 0x13) { /* If inches */ 277 /* Convert to millimeters */ 278 prev = physical_extents; 279 physical_extents *= 254; 280 if (physical_extents < prev) 281 return 0; 282 unit_exponent -= 1; 283 } else { 284 return 0; 285 } 286 break; 287 288 case ABS_RX: 289 case ABS_RY: 290 case ABS_RZ: 291 case ABS_WHEEL: 292 case ABS_TILT_X: 293 case ABS_TILT_Y: 294 if (field->unit == 0x14) { /* If degrees */ 295 /* Convert to radians */ 296 prev = logical_extents; 297 logical_extents *= 573; 298 if (logical_extents < prev) 299 return 0; 300 unit_exponent += 1; 301 } else if (field->unit != 0x12) { /* If not radians */ 302 return 0; 303 } 304 break; 305 306 default: 307 return 0; 308 } 309 310 /* Apply negative unit exponent */ 311 for (; unit_exponent < 0; unit_exponent++) { 312 prev = logical_extents; 313 logical_extents *= 10; 314 if (logical_extents < prev) 315 return 0; 316 } 317 /* Apply positive unit exponent */ 318 for (; unit_exponent > 0; unit_exponent--) { 319 prev = physical_extents; 320 physical_extents *= 10; 321 if (physical_extents < prev) 322 return 0; 323 } 324 325 /* Calculate resolution */ 326 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 327 } 328 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 329 330 #ifdef CONFIG_HID_BATTERY_STRENGTH 331 static enum power_supply_property hidinput_battery_props[] = { 332 POWER_SUPPLY_PROP_PRESENT, 333 POWER_SUPPLY_PROP_ONLINE, 334 POWER_SUPPLY_PROP_CAPACITY, 335 POWER_SUPPLY_PROP_MODEL_NAME, 336 POWER_SUPPLY_PROP_STATUS, 337 POWER_SUPPLY_PROP_SCOPE, 338 }; 339 340 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 341 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 342 #define HID_BATTERY_QUIRK_IGNORE (1 << 2) /* completely ignore the battery */ 343 #define HID_BATTERY_QUIRK_AVOID_QUERY (1 << 3) /* do not query the battery */ 344 345 static const struct hid_device_id hid_battery_quirks[] = { 346 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 347 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 348 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 349 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 350 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI), 351 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 352 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 353 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 354 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 355 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 356 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO), 357 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 358 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 359 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 360 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 361 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, 362 USB_DEVICE_ID_ELECOM_BM084), 363 HID_BATTERY_QUIRK_IGNORE }, 364 { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL, 365 USB_DEVICE_ID_SYMBOL_SCANNER_3), 366 HID_BATTERY_QUIRK_IGNORE }, 367 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK, 368 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD), 369 HID_BATTERY_QUIRK_IGNORE }, 370 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 371 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD), 372 HID_BATTERY_QUIRK_IGNORE }, 373 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN), 374 HID_BATTERY_QUIRK_IGNORE }, 375 { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN), 376 HID_BATTERY_QUIRK_IGNORE }, 377 { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L), 378 HID_BATTERY_QUIRK_AVOID_QUERY }, 379 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15), 380 HID_BATTERY_QUIRK_IGNORE }, 381 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100), 382 HID_BATTERY_QUIRK_IGNORE }, 383 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15), 384 HID_BATTERY_QUIRK_IGNORE }, 385 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN), 386 HID_BATTERY_QUIRK_IGNORE }, 387 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN), 388 HID_BATTERY_QUIRK_IGNORE }, 389 { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN), 390 HID_BATTERY_QUIRK_IGNORE }, 391 {} 392 }; 393 394 static unsigned find_battery_quirk(struct hid_device *hdev) 395 { 396 unsigned quirks = 0; 397 const struct hid_device_id *match; 398 399 match = hid_match_id(hdev, hid_battery_quirks); 400 if (match != NULL) 401 quirks = match->driver_data; 402 403 return quirks; 404 } 405 406 static int hidinput_scale_battery_capacity(struct hid_device *dev, 407 int value) 408 { 409 if (dev->battery_min < dev->battery_max && 410 value >= dev->battery_min && value <= dev->battery_max) 411 value = ((value - dev->battery_min) * 100) / 412 (dev->battery_max - dev->battery_min); 413 414 return value; 415 } 416 417 static int hidinput_query_battery_capacity(struct hid_device *dev) 418 { 419 u8 *buf; 420 int ret; 421 422 buf = kmalloc(4, GFP_KERNEL); 423 if (!buf) 424 return -ENOMEM; 425 426 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4, 427 dev->battery_report_type, HID_REQ_GET_REPORT); 428 if (ret < 2) { 429 kfree(buf); 430 return -ENODATA; 431 } 432 433 ret = hidinput_scale_battery_capacity(dev, buf[1]); 434 kfree(buf); 435 return ret; 436 } 437 438 static int hidinput_get_battery_property(struct power_supply *psy, 439 enum power_supply_property prop, 440 union power_supply_propval *val) 441 { 442 struct hid_device *dev = power_supply_get_drvdata(psy); 443 int value; 444 int ret = 0; 445 446 switch (prop) { 447 case POWER_SUPPLY_PROP_PRESENT: 448 case POWER_SUPPLY_PROP_ONLINE: 449 val->intval = 1; 450 break; 451 452 case POWER_SUPPLY_PROP_CAPACITY: 453 if (dev->battery_status != HID_BATTERY_REPORTED && 454 !dev->battery_avoid_query) { 455 value = hidinput_query_battery_capacity(dev); 456 if (value < 0) 457 return value; 458 } else { 459 value = dev->battery_capacity; 460 } 461 462 val->intval = value; 463 break; 464 465 case POWER_SUPPLY_PROP_MODEL_NAME: 466 val->strval = dev->name; 467 break; 468 469 case POWER_SUPPLY_PROP_STATUS: 470 if (dev->battery_status != HID_BATTERY_REPORTED && 471 !dev->battery_avoid_query) { 472 value = hidinput_query_battery_capacity(dev); 473 if (value < 0) 474 return value; 475 476 dev->battery_capacity = value; 477 dev->battery_status = HID_BATTERY_QUERIED; 478 } 479 480 if (dev->battery_status == HID_BATTERY_UNKNOWN) 481 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 482 else 483 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 484 break; 485 486 case POWER_SUPPLY_PROP_SCOPE: 487 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 488 break; 489 490 default: 491 ret = -EINVAL; 492 break; 493 } 494 495 return ret; 496 } 497 498 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 499 struct hid_field *field, bool is_percentage) 500 { 501 struct power_supply_desc *psy_desc; 502 struct power_supply_config psy_cfg = { .drv_data = dev, }; 503 unsigned quirks; 504 s32 min, max; 505 int error; 506 507 if (dev->battery) 508 return 0; /* already initialized? */ 509 510 quirks = find_battery_quirk(dev); 511 512 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 513 dev->bus, dev->vendor, dev->product, dev->version, quirks); 514 515 if (quirks & HID_BATTERY_QUIRK_IGNORE) 516 return 0; 517 518 psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL); 519 if (!psy_desc) 520 return -ENOMEM; 521 522 psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery", 523 strlen(dev->uniq) ? 524 dev->uniq : dev_name(&dev->dev)); 525 if (!psy_desc->name) { 526 error = -ENOMEM; 527 goto err_free_mem; 528 } 529 530 psy_desc->type = POWER_SUPPLY_TYPE_BATTERY; 531 psy_desc->properties = hidinput_battery_props; 532 psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props); 533 psy_desc->use_for_apm = 0; 534 psy_desc->get_property = hidinput_get_battery_property; 535 536 min = field->logical_minimum; 537 max = field->logical_maximum; 538 539 if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) { 540 min = 0; 541 max = 100; 542 } 543 544 if (quirks & HID_BATTERY_QUIRK_FEATURE) 545 report_type = HID_FEATURE_REPORT; 546 547 dev->battery_min = min; 548 dev->battery_max = max; 549 dev->battery_report_type = report_type; 550 dev->battery_report_id = field->report->id; 551 552 /* 553 * Stylus is normally not connected to the device and thus we 554 * can't query the device and get meaningful battery strength. 555 * We have to wait for the device to report it on its own. 556 */ 557 dev->battery_avoid_query = report_type == HID_INPUT_REPORT && 558 field->physical == HID_DG_STYLUS; 559 560 if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY) 561 dev->battery_avoid_query = true; 562 563 dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg); 564 if (IS_ERR(dev->battery)) { 565 error = PTR_ERR(dev->battery); 566 hid_warn(dev, "can't register power supply: %d\n", error); 567 goto err_free_name; 568 } 569 570 power_supply_powers(dev->battery, &dev->dev); 571 return 0; 572 573 err_free_name: 574 kfree(psy_desc->name); 575 err_free_mem: 576 kfree(psy_desc); 577 dev->battery = NULL; 578 return error; 579 } 580 581 static void hidinput_cleanup_battery(struct hid_device *dev) 582 { 583 const struct power_supply_desc *psy_desc; 584 585 if (!dev->battery) 586 return; 587 588 psy_desc = dev->battery->desc; 589 power_supply_unregister(dev->battery); 590 kfree(psy_desc->name); 591 kfree(psy_desc); 592 dev->battery = NULL; 593 } 594 595 static void hidinput_update_battery(struct hid_device *dev, int value) 596 { 597 int capacity; 598 599 if (!dev->battery) 600 return; 601 602 if (value == 0 || value < dev->battery_min || value > dev->battery_max) 603 return; 604 605 capacity = hidinput_scale_battery_capacity(dev, value); 606 607 if (dev->battery_status != HID_BATTERY_REPORTED || 608 capacity != dev->battery_capacity || 609 ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { 610 dev->battery_capacity = capacity; 611 dev->battery_status = HID_BATTERY_REPORTED; 612 dev->battery_ratelimit_time = 613 ktime_add_ms(ktime_get_coarse(), 30 * 1000); 614 power_supply_changed(dev->battery); 615 } 616 } 617 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 618 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 619 struct hid_field *field, bool is_percentage) 620 { 621 return 0; 622 } 623 624 static void hidinput_cleanup_battery(struct hid_device *dev) 625 { 626 } 627 628 static void hidinput_update_battery(struct hid_device *dev, int value) 629 { 630 } 631 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 632 633 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field, 634 unsigned int type, unsigned int usage) 635 { 636 struct hid_collection *collection; 637 638 collection = &device->collection[field->usage->collection_index]; 639 640 return collection->type == type && collection->usage == usage; 641 } 642 643 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 644 struct hid_usage *usage, unsigned int usage_index) 645 { 646 struct input_dev *input = hidinput->input; 647 struct hid_device *device = input_get_drvdata(input); 648 const struct usage_priority *usage_priority = NULL; 649 int max = 0, code; 650 unsigned int i = 0; 651 unsigned long *bit = NULL; 652 653 field->hidinput = hidinput; 654 655 if (field->flags & HID_MAIN_ITEM_CONSTANT) 656 goto ignore; 657 658 /* Ignore if report count is out of bounds. */ 659 if (field->report_count < 1) 660 goto ignore; 661 662 /* only LED usages are supported in output fields */ 663 if (field->report_type == HID_OUTPUT_REPORT && 664 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 665 goto ignore; 666 } 667 668 /* assign a priority based on the static list declared here */ 669 for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) { 670 if (usage->hid == hidinput_usages_priorities[i].usage) { 671 usage_priority = &hidinput_usages_priorities[i]; 672 673 field->usages_priorities[usage_index] = 674 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8; 675 break; 676 } 677 } 678 679 /* 680 * For slotted devices, we need to also add the slot index 681 * in the priority. 682 */ 683 if (usage_priority && usage_priority->global) 684 field->usages_priorities[usage_index] |= 685 usage_priority->slot_overwrite; 686 else 687 field->usages_priorities[usage_index] |= 688 (0xff - field->slot_idx) << 16; 689 690 if (device->driver->input_mapping) { 691 int ret = device->driver->input_mapping(device, hidinput, field, 692 usage, &bit, &max); 693 if (ret > 0) 694 goto mapped; 695 if (ret < 0) 696 goto ignore; 697 } 698 699 switch (usage->hid & HID_USAGE_PAGE) { 700 case HID_UP_UNDEFINED: 701 goto ignore; 702 703 case HID_UP_KEYBOARD: 704 set_bit(EV_REP, input->evbit); 705 706 if ((usage->hid & HID_USAGE) < 256) { 707 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 708 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 709 } else 710 map_key(KEY_UNKNOWN); 711 712 break; 713 714 case HID_UP_BUTTON: 715 code = ((usage->hid - 1) & HID_USAGE); 716 717 switch (field->application) { 718 case HID_GD_MOUSE: 719 case HID_GD_POINTER: code += BTN_MOUSE; break; 720 case HID_GD_JOYSTICK: 721 if (code <= 0xf) 722 code += BTN_JOYSTICK; 723 else 724 code += BTN_TRIGGER_HAPPY - 0x10; 725 break; 726 case HID_GD_GAMEPAD: 727 if (code <= 0xf) 728 code += BTN_GAMEPAD; 729 else 730 code += BTN_TRIGGER_HAPPY - 0x10; 731 break; 732 case HID_CP_CONSUMER_CONTROL: 733 if (hidinput_field_in_collection(device, field, 734 HID_COLLECTION_NAMED_ARRAY, 735 HID_CP_PROGRAMMABLEBUTTONS)) { 736 if (code <= 0x1d) 737 code += KEY_MACRO1; 738 else 739 code += BTN_TRIGGER_HAPPY - 0x1e; 740 break; 741 } 742 fallthrough; 743 default: 744 switch (field->physical) { 745 case HID_GD_MOUSE: 746 case HID_GD_POINTER: code += BTN_MOUSE; break; 747 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 748 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 749 default: code += BTN_MISC; 750 } 751 } 752 753 map_key(code); 754 break; 755 756 case HID_UP_SIMULATION: 757 switch (usage->hid & 0xffff) { 758 case 0xba: map_abs(ABS_RUDDER); break; 759 case 0xbb: map_abs(ABS_THROTTLE); break; 760 case 0xc4: map_abs(ABS_GAS); break; 761 case 0xc5: map_abs(ABS_BRAKE); break; 762 case 0xc8: map_abs(ABS_WHEEL); break; 763 default: goto ignore; 764 } 765 break; 766 767 case HID_UP_GENDESK: 768 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 769 switch (usage->hid & 0xf) { 770 case 0x1: map_key_clear(KEY_POWER); break; 771 case 0x2: map_key_clear(KEY_SLEEP); break; 772 case 0x3: map_key_clear(KEY_WAKEUP); break; 773 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 774 case 0x5: map_key_clear(KEY_MENU); break; 775 case 0x6: map_key_clear(KEY_PROG1); break; 776 case 0x7: map_key_clear(KEY_HELP); break; 777 case 0x8: map_key_clear(KEY_EXIT); break; 778 case 0x9: map_key_clear(KEY_SELECT); break; 779 case 0xa: map_key_clear(KEY_RIGHT); break; 780 case 0xb: map_key_clear(KEY_LEFT); break; 781 case 0xc: map_key_clear(KEY_UP); break; 782 case 0xd: map_key_clear(KEY_DOWN); break; 783 case 0xe: map_key_clear(KEY_POWER2); break; 784 case 0xf: map_key_clear(KEY_RESTART); break; 785 default: goto unknown; 786 } 787 break; 788 } 789 790 if ((usage->hid & 0xf0) == 0xb0) { /* SC - Display */ 791 switch (usage->hid & 0xf) { 792 case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break; 793 default: goto ignore; 794 } 795 break; 796 } 797 798 /* 799 * Some lazy vendors declare 255 usages for System Control, 800 * leading to the creation of ABS_X|Y axis and too many others. 801 * It wouldn't be a problem if joydev doesn't consider the 802 * device as a joystick then. 803 */ 804 if (field->application == HID_GD_SYSTEM_CONTROL) 805 goto ignore; 806 807 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 808 switch (usage->hid) { 809 case HID_GD_UP: usage->hat_dir = 1; break; 810 case HID_GD_DOWN: usage->hat_dir = 5; break; 811 case HID_GD_RIGHT: usage->hat_dir = 3; break; 812 case HID_GD_LEFT: usage->hat_dir = 7; break; 813 default: goto unknown; 814 } 815 if (field->dpad) { 816 map_abs(field->dpad); 817 goto ignore; 818 } 819 map_abs(ABS_HAT0X); 820 break; 821 } 822 823 switch (usage->hid) { 824 /* These usage IDs map directly to the usage codes. */ 825 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 826 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 827 if (field->flags & HID_MAIN_ITEM_RELATIVE) 828 map_rel(usage->hid & 0xf); 829 else 830 map_abs_clear(usage->hid & 0xf); 831 break; 832 833 case HID_GD_WHEEL: 834 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 835 set_bit(REL_WHEEL, input->relbit); 836 map_rel(REL_WHEEL_HI_RES); 837 } else { 838 map_abs(usage->hid & 0xf); 839 } 840 break; 841 case HID_GD_SLIDER: case HID_GD_DIAL: 842 if (field->flags & HID_MAIN_ITEM_RELATIVE) 843 map_rel(usage->hid & 0xf); 844 else 845 map_abs(usage->hid & 0xf); 846 break; 847 848 case HID_GD_HATSWITCH: 849 usage->hat_min = field->logical_minimum; 850 usage->hat_max = field->logical_maximum; 851 map_abs(ABS_HAT0X); 852 break; 853 854 case HID_GD_START: map_key_clear(BTN_START); break; 855 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 856 857 case HID_GD_RFKILL_BTN: 858 /* MS wireless radio ctl extension, also check CA */ 859 if (field->application == HID_GD_WIRELESS_RADIO_CTLS) { 860 map_key_clear(KEY_RFKILL); 861 /* We need to simulate the btn release */ 862 field->flags |= HID_MAIN_ITEM_RELATIVE; 863 break; 864 } 865 goto unknown; 866 867 default: goto unknown; 868 } 869 870 break; 871 872 case HID_UP_LED: 873 switch (usage->hid & 0xffff) { /* HID-Value: */ 874 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 875 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 876 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 877 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 878 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 879 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 880 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 881 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 882 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 883 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 884 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 885 886 default: goto ignore; 887 } 888 break; 889 890 case HID_UP_DIGITIZER: 891 if ((field->application & 0xff) == 0x01) /* Digitizer */ 892 __set_bit(INPUT_PROP_POINTER, input->propbit); 893 else if ((field->application & 0xff) == 0x02) /* Pen */ 894 __set_bit(INPUT_PROP_DIRECT, input->propbit); 895 896 switch (usage->hid & 0xff) { 897 case 0x00: /* Undefined */ 898 goto ignore; 899 900 case 0x30: /* TipPressure */ 901 if (!test_bit(BTN_TOUCH, input->keybit)) { 902 device->quirks |= HID_QUIRK_NOTOUCH; 903 set_bit(EV_KEY, input->evbit); 904 set_bit(BTN_TOUCH, input->keybit); 905 } 906 map_abs_clear(ABS_PRESSURE); 907 break; 908 909 case 0x32: /* InRange */ 910 switch (field->physical) { 911 case HID_DG_PUCK: 912 map_key(BTN_TOOL_MOUSE); 913 break; 914 case HID_DG_FINGER: 915 map_key(BTN_TOOL_FINGER); 916 break; 917 default: 918 /* 919 * If the physical is not given, 920 * rely on the application. 921 */ 922 if (!field->physical) { 923 switch (field->application) { 924 case HID_DG_TOUCHSCREEN: 925 case HID_DG_TOUCHPAD: 926 map_key_clear(BTN_TOOL_FINGER); 927 break; 928 default: 929 map_key_clear(BTN_TOOL_PEN); 930 } 931 } else { 932 map_key(BTN_TOOL_PEN); 933 } 934 break; 935 } 936 break; 937 938 case 0x3b: /* Battery Strength */ 939 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 940 usage->type = EV_PWR; 941 return; 942 943 case 0x3c: /* Invert */ 944 map_key_clear(BTN_TOOL_RUBBER); 945 break; 946 947 case 0x3d: /* X Tilt */ 948 map_abs_clear(ABS_TILT_X); 949 break; 950 951 case 0x3e: /* Y Tilt */ 952 map_abs_clear(ABS_TILT_Y); 953 break; 954 955 case 0x33: /* Touch */ 956 case 0x42: /* TipSwitch */ 957 case 0x43: /* TipSwitch2 */ 958 device->quirks &= ~HID_QUIRK_NOTOUCH; 959 map_key_clear(BTN_TOUCH); 960 break; 961 962 case 0x44: /* BarrelSwitch */ 963 map_key_clear(BTN_STYLUS); 964 break; 965 966 case 0x45: /* ERASER */ 967 /* 968 * This event is reported when eraser tip touches the surface. 969 * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when 970 * tool gets in proximity. 971 */ 972 map_key_clear(BTN_TOUCH); 973 break; 974 975 case 0x46: /* TabletPick */ 976 case 0x5a: /* SecondaryBarrelSwitch */ 977 map_key_clear(BTN_STYLUS2); 978 break; 979 980 case 0x5b: /* TransducerSerialNumber */ 981 case 0x6e: /* TransducerSerialNumber2 */ 982 map_msc(MSC_SERIAL); 983 break; 984 985 default: goto unknown; 986 } 987 break; 988 989 case HID_UP_TELEPHONY: 990 switch (usage->hid & HID_USAGE) { 991 case 0x2f: map_key_clear(KEY_MICMUTE); break; 992 case 0xb0: map_key_clear(KEY_NUMERIC_0); break; 993 case 0xb1: map_key_clear(KEY_NUMERIC_1); break; 994 case 0xb2: map_key_clear(KEY_NUMERIC_2); break; 995 case 0xb3: map_key_clear(KEY_NUMERIC_3); break; 996 case 0xb4: map_key_clear(KEY_NUMERIC_4); break; 997 case 0xb5: map_key_clear(KEY_NUMERIC_5); break; 998 case 0xb6: map_key_clear(KEY_NUMERIC_6); break; 999 case 0xb7: map_key_clear(KEY_NUMERIC_7); break; 1000 case 0xb8: map_key_clear(KEY_NUMERIC_8); break; 1001 case 0xb9: map_key_clear(KEY_NUMERIC_9); break; 1002 case 0xba: map_key_clear(KEY_NUMERIC_STAR); break; 1003 case 0xbb: map_key_clear(KEY_NUMERIC_POUND); break; 1004 case 0xbc: map_key_clear(KEY_NUMERIC_A); break; 1005 case 0xbd: map_key_clear(KEY_NUMERIC_B); break; 1006 case 0xbe: map_key_clear(KEY_NUMERIC_C); break; 1007 case 0xbf: map_key_clear(KEY_NUMERIC_D); break; 1008 default: goto ignore; 1009 } 1010 break; 1011 1012 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 1013 switch (usage->hid & HID_USAGE) { 1014 case 0x000: goto ignore; 1015 case 0x030: map_key_clear(KEY_POWER); break; 1016 case 0x031: map_key_clear(KEY_RESTART); break; 1017 case 0x032: map_key_clear(KEY_SLEEP); break; 1018 case 0x034: map_key_clear(KEY_SLEEP); break; 1019 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1020 case 0x036: map_key_clear(BTN_MISC); break; 1021 1022 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 1023 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 1024 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 1025 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 1026 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 1027 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 1028 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 1029 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 1030 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 1031 1032 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 1033 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 1034 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 1035 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 1036 case 0x069: map_key_clear(KEY_RED); break; 1037 case 0x06a: map_key_clear(KEY_GREEN); break; 1038 case 0x06b: map_key_clear(KEY_BLUE); break; 1039 case 0x06c: map_key_clear(KEY_YELLOW); break; 1040 case 0x06d: map_key_clear(KEY_ASPECT_RATIO); break; 1041 1042 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 1043 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1044 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 1045 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 1046 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 1047 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 1048 1049 case 0x079: map_key_clear(KEY_KBDILLUMUP); break; 1050 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN); break; 1051 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE); break; 1052 1053 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 1054 case 0x083: map_key_clear(KEY_LAST); break; 1055 case 0x084: map_key_clear(KEY_ENTER); break; 1056 case 0x088: map_key_clear(KEY_PC); break; 1057 case 0x089: map_key_clear(KEY_TV); break; 1058 case 0x08a: map_key_clear(KEY_WWW); break; 1059 case 0x08b: map_key_clear(KEY_DVD); break; 1060 case 0x08c: map_key_clear(KEY_PHONE); break; 1061 case 0x08d: map_key_clear(KEY_PROGRAM); break; 1062 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 1063 case 0x08f: map_key_clear(KEY_GAMES); break; 1064 case 0x090: map_key_clear(KEY_MEMO); break; 1065 case 0x091: map_key_clear(KEY_CD); break; 1066 case 0x092: map_key_clear(KEY_VCR); break; 1067 case 0x093: map_key_clear(KEY_TUNER); break; 1068 case 0x094: map_key_clear(KEY_EXIT); break; 1069 case 0x095: map_key_clear(KEY_HELP); break; 1070 case 0x096: map_key_clear(KEY_TAPE); break; 1071 case 0x097: map_key_clear(KEY_TV2); break; 1072 case 0x098: map_key_clear(KEY_SAT); break; 1073 case 0x09a: map_key_clear(KEY_PVR); break; 1074 1075 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 1076 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 1077 case 0x0a0: map_key_clear(KEY_VCR2); break; 1078 1079 case 0x0b0: map_key_clear(KEY_PLAY); break; 1080 case 0x0b1: map_key_clear(KEY_PAUSE); break; 1081 case 0x0b2: map_key_clear(KEY_RECORD); break; 1082 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 1083 case 0x0b4: map_key_clear(KEY_REWIND); break; 1084 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 1085 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 1086 case 0x0b7: map_key_clear(KEY_STOPCD); break; 1087 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 1088 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 1089 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 1090 case 0x0bf: map_key_clear(KEY_SLOW); break; 1091 1092 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 1093 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 1094 1095 case 0x0d5: map_key_clear(KEY_CAMERA_ACCESS_ENABLE); break; 1096 case 0x0d6: map_key_clear(KEY_CAMERA_ACCESS_DISABLE); break; 1097 case 0x0d7: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE); break; 1098 case 0x0d8: map_key_clear(KEY_DICTATE); break; 1099 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER); break; 1100 1101 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 1102 case 0x0e2: map_key_clear(KEY_MUTE); break; 1103 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 1104 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 1105 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 1106 case 0x0f5: map_key_clear(KEY_SLOW); break; 1107 1108 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 1109 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 1110 case 0x183: map_key_clear(KEY_CONFIG); break; 1111 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 1112 case 0x185: map_key_clear(KEY_EDITOR); break; 1113 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 1114 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 1115 case 0x188: map_key_clear(KEY_PRESENTATION); break; 1116 case 0x189: map_key_clear(KEY_DATABASE); break; 1117 case 0x18a: map_key_clear(KEY_MAIL); break; 1118 case 0x18b: map_key_clear(KEY_NEWS); break; 1119 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 1120 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 1121 case 0x18e: map_key_clear(KEY_CALENDAR); break; 1122 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 1123 case 0x190: map_key_clear(KEY_JOURNAL); break; 1124 case 0x191: map_key_clear(KEY_FINANCE); break; 1125 case 0x192: map_key_clear(KEY_CALC); break; 1126 case 0x193: map_key_clear(KEY_PLAYER); break; 1127 case 0x194: map_key_clear(KEY_FILE); break; 1128 case 0x196: map_key_clear(KEY_WWW); break; 1129 case 0x199: map_key_clear(KEY_CHAT); break; 1130 case 0x19c: map_key_clear(KEY_LOGOFF); break; 1131 case 0x19e: map_key_clear(KEY_COFFEE); break; 1132 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 1133 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 1134 case 0x1a3: map_key_clear(KEY_NEXT); break; 1135 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 1136 case 0x1a6: map_key_clear(KEY_HELP); break; 1137 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 1138 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 1139 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 1140 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 1141 case 0x1b4: map_key_clear(KEY_FILE); break; 1142 case 0x1b6: map_key_clear(KEY_IMAGES); break; 1143 case 0x1b7: map_key_clear(KEY_AUDIO); break; 1144 case 0x1b8: map_key_clear(KEY_VIDEO); break; 1145 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 1146 case 0x1bd: map_key_clear(KEY_INFO); break; 1147 case 0x1cb: map_key_clear(KEY_ASSISTANT); break; 1148 case 0x201: map_key_clear(KEY_NEW); break; 1149 case 0x202: map_key_clear(KEY_OPEN); break; 1150 case 0x203: map_key_clear(KEY_CLOSE); break; 1151 case 0x204: map_key_clear(KEY_EXIT); break; 1152 case 0x207: map_key_clear(KEY_SAVE); break; 1153 case 0x208: map_key_clear(KEY_PRINT); break; 1154 case 0x209: map_key_clear(KEY_PROPS); break; 1155 case 0x21a: map_key_clear(KEY_UNDO); break; 1156 case 0x21b: map_key_clear(KEY_COPY); break; 1157 case 0x21c: map_key_clear(KEY_CUT); break; 1158 case 0x21d: map_key_clear(KEY_PASTE); break; 1159 case 0x21f: map_key_clear(KEY_FIND); break; 1160 case 0x221: map_key_clear(KEY_SEARCH); break; 1161 case 0x222: map_key_clear(KEY_GOTO); break; 1162 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 1163 case 0x224: map_key_clear(KEY_BACK); break; 1164 case 0x225: map_key_clear(KEY_FORWARD); break; 1165 case 0x226: map_key_clear(KEY_STOP); break; 1166 case 0x227: map_key_clear(KEY_REFRESH); break; 1167 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 1168 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 1169 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 1170 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 1171 case 0x232: map_key_clear(KEY_FULL_SCREEN); break; 1172 case 0x233: map_key_clear(KEY_SCROLLUP); break; 1173 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 1174 case 0x238: /* AC Pan */ 1175 set_bit(REL_HWHEEL, input->relbit); 1176 map_rel(REL_HWHEEL_HI_RES); 1177 break; 1178 case 0x23d: map_key_clear(KEY_EDIT); break; 1179 case 0x25f: map_key_clear(KEY_CANCEL); break; 1180 case 0x269: map_key_clear(KEY_INSERT); break; 1181 case 0x26a: map_key_clear(KEY_DELETE); break; 1182 case 0x279: map_key_clear(KEY_REDO); break; 1183 1184 case 0x289: map_key_clear(KEY_REPLY); break; 1185 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 1186 case 0x28c: map_key_clear(KEY_SEND); break; 1187 1188 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break; 1189 1190 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS); break; 1191 1192 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV); break; 1193 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT); break; 1194 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP); break; 1195 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP); break; 1196 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT); break; 1197 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL); break; 1198 1199 case 0x29f: map_key_clear(KEY_SCALE); break; 1200 1201 default: map_key_clear(KEY_UNKNOWN); 1202 } 1203 break; 1204 1205 case HID_UP_GENDEVCTRLS: 1206 switch (usage->hid) { 1207 case HID_DC_BATTERYSTRENGTH: 1208 hidinput_setup_battery(device, HID_INPUT_REPORT, field, false); 1209 usage->type = EV_PWR; 1210 return; 1211 } 1212 goto unknown; 1213 1214 case HID_UP_BATTERY: 1215 switch (usage->hid) { 1216 case HID_BAT_ABSOLUTESTATEOFCHARGE: 1217 hidinput_setup_battery(device, HID_INPUT_REPORT, field, true); 1218 usage->type = EV_PWR; 1219 return; 1220 } 1221 goto unknown; 1222 1223 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 1224 set_bit(EV_REP, input->evbit); 1225 switch (usage->hid & HID_USAGE) { 1226 case 0x021: map_key_clear(KEY_PRINT); break; 1227 case 0x070: map_key_clear(KEY_HP); break; 1228 case 0x071: map_key_clear(KEY_CAMERA); break; 1229 case 0x072: map_key_clear(KEY_SOUND); break; 1230 case 0x073: map_key_clear(KEY_QUESTION); break; 1231 case 0x080: map_key_clear(KEY_EMAIL); break; 1232 case 0x081: map_key_clear(KEY_CHAT); break; 1233 case 0x082: map_key_clear(KEY_SEARCH); break; 1234 case 0x083: map_key_clear(KEY_CONNECT); break; 1235 case 0x084: map_key_clear(KEY_FINANCE); break; 1236 case 0x085: map_key_clear(KEY_SPORT); break; 1237 case 0x086: map_key_clear(KEY_SHOP); break; 1238 default: goto ignore; 1239 } 1240 break; 1241 1242 case HID_UP_HPVENDOR2: 1243 set_bit(EV_REP, input->evbit); 1244 switch (usage->hid & HID_USAGE) { 1245 case 0x001: map_key_clear(KEY_MICMUTE); break; 1246 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 1247 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 1248 default: goto ignore; 1249 } 1250 break; 1251 1252 case HID_UP_MSVENDOR: 1253 goto ignore; 1254 1255 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 1256 set_bit(EV_REP, input->evbit); 1257 goto ignore; 1258 1259 case HID_UP_LOGIVENDOR: 1260 /* intentional fallback */ 1261 case HID_UP_LOGIVENDOR2: 1262 /* intentional fallback */ 1263 case HID_UP_LOGIVENDOR3: 1264 goto ignore; 1265 1266 case HID_UP_PID: 1267 switch (usage->hid & HID_USAGE) { 1268 case 0xa4: map_key_clear(BTN_DEAD); break; 1269 default: goto ignore; 1270 } 1271 break; 1272 1273 default: 1274 unknown: 1275 if (field->report_size == 1) { 1276 if (field->report->type == HID_OUTPUT_REPORT) { 1277 map_led(LED_MISC); 1278 break; 1279 } 1280 map_key(BTN_MISC); 1281 break; 1282 } 1283 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 1284 map_rel(REL_MISC); 1285 break; 1286 } 1287 map_abs(ABS_MISC); 1288 break; 1289 } 1290 1291 mapped: 1292 /* Mapping failed, bail out */ 1293 if (!bit) 1294 return; 1295 1296 if (device->driver->input_mapped && 1297 device->driver->input_mapped(device, hidinput, field, usage, 1298 &bit, &max) < 0) { 1299 /* 1300 * The driver indicated that no further generic handling 1301 * of the usage is desired. 1302 */ 1303 return; 1304 } 1305 1306 set_bit(usage->type, input->evbit); 1307 1308 /* 1309 * This part is *really* controversial: 1310 * - HID aims at being generic so we should do our best to export 1311 * all incoming events 1312 * - HID describes what events are, so there is no reason for ABS_X 1313 * to be mapped to ABS_Y 1314 * - HID is using *_MISC+N as a default value, but nothing prevents 1315 * *_MISC+N to overwrite a legitimate even, which confuses userspace 1316 * (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different 1317 * processing) 1318 * 1319 * If devices still want to use this (at their own risk), they will 1320 * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but 1321 * the default should be a reliable mapping. 1322 */ 1323 while (usage->code <= max && test_and_set_bit(usage->code, bit)) { 1324 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) { 1325 usage->code = find_next_zero_bit(bit, 1326 max + 1, 1327 usage->code); 1328 } else { 1329 device->status |= HID_STAT_DUP_DETECTED; 1330 goto ignore; 1331 } 1332 } 1333 1334 if (usage->code > max) 1335 goto ignore; 1336 1337 if (usage->type == EV_ABS) { 1338 1339 int a = field->logical_minimum; 1340 int b = field->logical_maximum; 1341 1342 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 1343 a = field->logical_minimum = 0; 1344 b = field->logical_maximum = 255; 1345 } 1346 1347 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 1348 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 1349 else input_set_abs_params(input, usage->code, a, b, 0, 0); 1350 1351 input_abs_set_res(input, usage->code, 1352 hidinput_calc_abs_res(field, usage->code)); 1353 1354 /* use a larger default input buffer for MT devices */ 1355 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 1356 input_set_events_per_packet(input, 60); 1357 } 1358 1359 if (usage->type == EV_ABS && 1360 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 1361 int i; 1362 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 1363 input_set_abs_params(input, i, -1, 1, 0, 0); 1364 set_bit(i, input->absbit); 1365 } 1366 if (usage->hat_dir && !field->dpad) 1367 field->dpad = usage->code; 1368 } 1369 1370 /* for those devices which produce Consumer volume usage as relative, 1371 * we emulate pressing volumeup/volumedown appropriate number of times 1372 * in hidinput_hid_event() 1373 */ 1374 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1375 (usage->code == ABS_VOLUME)) { 1376 set_bit(KEY_VOLUMEUP, input->keybit); 1377 set_bit(KEY_VOLUMEDOWN, input->keybit); 1378 } 1379 1380 if (usage->type == EV_KEY) { 1381 set_bit(EV_MSC, input->evbit); 1382 set_bit(MSC_SCAN, input->mscbit); 1383 } 1384 1385 return; 1386 1387 ignore: 1388 usage->type = 0; 1389 usage->code = 0; 1390 } 1391 1392 static void hidinput_handle_scroll(struct hid_usage *usage, 1393 struct input_dev *input, 1394 __s32 value) 1395 { 1396 int code; 1397 int hi_res, lo_res; 1398 1399 if (value == 0) 1400 return; 1401 1402 if (usage->code == REL_WHEEL_HI_RES) 1403 code = REL_WHEEL; 1404 else 1405 code = REL_HWHEEL; 1406 1407 /* 1408 * Windows reports one wheel click as value 120. Where a high-res 1409 * scroll wheel is present, a fraction of 120 is reported instead. 1410 * Our REL_WHEEL_HI_RES axis does the same because all HW must 1411 * adhere to the 120 expectation. 1412 */ 1413 hi_res = value * 120/usage->resolution_multiplier; 1414 1415 usage->wheel_accumulated += hi_res; 1416 lo_res = usage->wheel_accumulated/120; 1417 if (lo_res) 1418 usage->wheel_accumulated -= lo_res * 120; 1419 1420 input_event(input, EV_REL, code, lo_res); 1421 input_event(input, EV_REL, usage->code, hi_res); 1422 } 1423 1424 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input, 1425 unsigned int tool) 1426 { 1427 /* if the given tool is not currently reported, ignore */ 1428 if (!test_bit(tool, input->key)) 1429 return; 1430 1431 /* 1432 * if the given tool was previously set, release it, 1433 * release any TOUCH and send an EV_SYN 1434 */ 1435 input_event(input, EV_KEY, BTN_TOUCH, 0); 1436 input_event(input, EV_KEY, tool, 0); 1437 input_event(input, EV_SYN, SYN_REPORT, 0); 1438 1439 report->tool = 0; 1440 } 1441 1442 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input, 1443 unsigned int new_tool) 1444 { 1445 if (report->tool != new_tool) 1446 hid_report_release_tool(report, input, report->tool); 1447 1448 input_event(input, EV_KEY, new_tool, 1); 1449 report->tool = new_tool; 1450 } 1451 1452 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1453 { 1454 struct input_dev *input; 1455 struct hid_report *report = field->report; 1456 unsigned *quirks = &hid->quirks; 1457 1458 if (!usage->type) 1459 return; 1460 1461 if (usage->type == EV_PWR) { 1462 hidinput_update_battery(hid, value); 1463 return; 1464 } 1465 1466 if (!field->hidinput) 1467 return; 1468 1469 input = field->hidinput->input; 1470 1471 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1472 int hat_dir = usage->hat_dir; 1473 if (!hat_dir) 1474 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1475 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1476 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1477 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1478 return; 1479 } 1480 1481 /* 1482 * Ignore out-of-range values as per HID specification, 1483 * section 5.10 and 6.2.25, when NULL state bit is present. 1484 * When it's not, clamp the value to match Microsoft's input 1485 * driver as mentioned in "Required HID usages for digitizers": 1486 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp 1487 * 1488 * The logical_minimum < logical_maximum check is done so that we 1489 * don't unintentionally discard values sent by devices which 1490 * don't specify logical min and max. 1491 */ 1492 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1493 field->logical_minimum < field->logical_maximum) { 1494 if (field->flags & HID_MAIN_ITEM_NULL_STATE && 1495 (value < field->logical_minimum || 1496 value > field->logical_maximum)) { 1497 dbg_hid("Ignoring out-of-range value %x\n", value); 1498 return; 1499 } 1500 value = clamp(value, 1501 field->logical_minimum, 1502 field->logical_maximum); 1503 } 1504 1505 switch (usage->hid) { 1506 case HID_DG_ERASER: 1507 report->tool_active |= !!value; 1508 1509 /* 1510 * if eraser is set, we must enforce BTN_TOOL_RUBBER 1511 * to accommodate for devices not following the spec. 1512 */ 1513 if (value) 1514 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1515 else if (report->tool != BTN_TOOL_RUBBER) 1516 /* value is off, tool is not rubber, ignore */ 1517 return; 1518 1519 /* let hid-input set BTN_TOUCH */ 1520 break; 1521 1522 case HID_DG_INVERT: 1523 report->tool_active |= !!value; 1524 1525 /* 1526 * If invert is set, we store BTN_TOOL_RUBBER. 1527 */ 1528 if (value) 1529 hid_report_set_tool(report, input, BTN_TOOL_RUBBER); 1530 else if (!report->tool_active) 1531 /* tool_active not set means Invert and Eraser are not set */ 1532 hid_report_release_tool(report, input, BTN_TOOL_RUBBER); 1533 1534 /* no further processing */ 1535 return; 1536 1537 case HID_DG_INRANGE: 1538 report->tool_active |= !!value; 1539 1540 if (report->tool_active) { 1541 /* 1542 * if tool is not set but is marked as active, 1543 * assume ours 1544 */ 1545 if (!report->tool) 1546 report->tool = usage->code; 1547 1548 /* drivers may have changed the value behind our back, resend it */ 1549 hid_report_set_tool(report, input, report->tool); 1550 } else { 1551 hid_report_release_tool(report, input, usage->code); 1552 } 1553 1554 /* reset tool_active for the next event */ 1555 report->tool_active = false; 1556 1557 /* no further processing */ 1558 return; 1559 1560 case HID_DG_TIPSWITCH: 1561 report->tool_active |= !!value; 1562 1563 /* if tool is set to RUBBER we should ignore the current value */ 1564 if (report->tool == BTN_TOOL_RUBBER) 1565 return; 1566 1567 break; 1568 1569 case HID_DG_TIPPRESSURE: 1570 if (*quirks & HID_QUIRK_NOTOUCH) { 1571 int a = field->logical_minimum; 1572 int b = field->logical_maximum; 1573 1574 if (value > a + ((b - a) >> 3)) { 1575 input_event(input, EV_KEY, BTN_TOUCH, 1); 1576 report->tool_active = true; 1577 } 1578 } 1579 break; 1580 1581 case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */ 1582 dbg_hid("Maximum Effects - %d\n",value); 1583 return; 1584 1585 case HID_UP_PID | 0x7fUL: 1586 dbg_hid("PID Pool Report\n"); 1587 return; 1588 } 1589 1590 switch (usage->type) { 1591 case EV_KEY: 1592 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1593 return; 1594 break; 1595 1596 case EV_REL: 1597 if (usage->code == REL_WHEEL_HI_RES || 1598 usage->code == REL_HWHEEL_HI_RES) { 1599 hidinput_handle_scroll(usage, input, value); 1600 return; 1601 } 1602 break; 1603 1604 case EV_ABS: 1605 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1606 usage->code == ABS_VOLUME) { 1607 int count = abs(value); 1608 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1609 int i; 1610 1611 for (i = 0; i < count; i++) { 1612 input_event(input, EV_KEY, direction, 1); 1613 input_sync(input); 1614 input_event(input, EV_KEY, direction, 0); 1615 input_sync(input); 1616 } 1617 return; 1618 1619 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) || 1620 ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y)) 1621 value = field->logical_maximum - value; 1622 break; 1623 } 1624 1625 /* 1626 * Ignore reports for absolute data if the data didn't change. This is 1627 * not only an optimization but also fixes 'dead' key reports. Some 1628 * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID 1629 * 0x31 and 0x32) report multiple keys, even though a localized keyboard 1630 * can only have one of them physically available. The 'dead' keys 1631 * report constant 0. As all map to the same keycode, they'd confuse 1632 * the input layer. If we filter the 'dead' keys on the HID level, we 1633 * skip the keycode translation and only forward real events. 1634 */ 1635 if (!(field->flags & (HID_MAIN_ITEM_RELATIVE | 1636 HID_MAIN_ITEM_BUFFERED_BYTE)) && 1637 (field->flags & HID_MAIN_ITEM_VARIABLE) && 1638 usage->usage_index < field->maxusage && 1639 value == field->value[usage->usage_index]) 1640 return; 1641 1642 /* report the usage code as scancode if the key status has changed */ 1643 if (usage->type == EV_KEY && 1644 (!test_bit(usage->code, input->key)) == value) 1645 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1646 1647 input_event(input, usage->type, usage->code, value); 1648 1649 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && 1650 usage->type == EV_KEY && value) { 1651 input_sync(input); 1652 input_event(input, usage->type, usage->code, 0); 1653 } 1654 } 1655 1656 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1657 { 1658 struct hid_input *hidinput; 1659 1660 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1661 return; 1662 1663 list_for_each_entry(hidinput, &hid->inputs, list) 1664 input_sync(hidinput->input); 1665 } 1666 EXPORT_SYMBOL_GPL(hidinput_report_event); 1667 1668 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 1669 unsigned int code, struct hid_field **field) 1670 { 1671 struct hid_report *report; 1672 int i, j; 1673 1674 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1675 for (i = 0; i < report->maxfield; i++) { 1676 *field = report->field[i]; 1677 for (j = 0; j < (*field)->maxusage; j++) 1678 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1679 return j; 1680 } 1681 } 1682 return -1; 1683 } 1684 1685 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1686 { 1687 struct hid_report *report; 1688 struct hid_field *field; 1689 int i, j; 1690 1691 list_for_each_entry(report, 1692 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1693 list) { 1694 for (i = 0; i < report->maxfield; i++) { 1695 field = report->field[i]; 1696 for (j = 0; j < field->maxusage; j++) 1697 if (field->usage[j].type == EV_LED) 1698 return field; 1699 } 1700 } 1701 return NULL; 1702 } 1703 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1704 1705 unsigned int hidinput_count_leds(struct hid_device *hid) 1706 { 1707 struct hid_report *report; 1708 struct hid_field *field; 1709 int i, j; 1710 unsigned int count = 0; 1711 1712 list_for_each_entry(report, 1713 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1714 list) { 1715 for (i = 0; i < report->maxfield; i++) { 1716 field = report->field[i]; 1717 for (j = 0; j < field->maxusage; j++) 1718 if (field->usage[j].type == EV_LED && 1719 field->value[j]) 1720 count += 1; 1721 } 1722 } 1723 return count; 1724 } 1725 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1726 1727 static void hidinput_led_worker(struct work_struct *work) 1728 { 1729 struct hid_device *hid = container_of(work, struct hid_device, 1730 led_work); 1731 struct hid_field *field; 1732 struct hid_report *report; 1733 int ret; 1734 u32 len; 1735 __u8 *buf; 1736 1737 field = hidinput_get_led_field(hid); 1738 if (!field) 1739 return; 1740 1741 /* 1742 * field->report is accessed unlocked regarding HID core. So there might 1743 * be another incoming SET-LED request from user-space, which changes 1744 * the LED state while we assemble our outgoing buffer. However, this 1745 * doesn't matter as hid_output_report() correctly converts it into a 1746 * boolean value no matter what information is currently set on the LED 1747 * field (even garbage). So the remote device will always get a valid 1748 * request. 1749 * And in case we send a wrong value, a next led worker is spawned 1750 * for every SET-LED request so the following worker will send the 1751 * correct value, guaranteed! 1752 */ 1753 1754 report = field->report; 1755 1756 /* use custom SET_REPORT request if possible (asynchronous) */ 1757 if (hid->ll_driver->request) 1758 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1759 1760 /* fall back to generic raw-output-report */ 1761 len = hid_report_len(report); 1762 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1763 if (!buf) 1764 return; 1765 1766 hid_output_report(report, buf); 1767 /* synchronous output report */ 1768 ret = hid_hw_output_report(hid, buf, len); 1769 if (ret == -ENOSYS) 1770 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1771 HID_REQ_SET_REPORT); 1772 kfree(buf); 1773 } 1774 1775 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1776 unsigned int code, int value) 1777 { 1778 struct hid_device *hid = input_get_drvdata(dev); 1779 struct hid_field *field; 1780 int offset; 1781 1782 if (type == EV_FF) 1783 return input_ff_event(dev, type, code, value); 1784 1785 if (type != EV_LED) 1786 return -1; 1787 1788 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1789 hid_warn(dev, "event field not found\n"); 1790 return -1; 1791 } 1792 1793 hid_set_field(field, offset, value); 1794 1795 schedule_work(&hid->led_work); 1796 return 0; 1797 } 1798 1799 static int hidinput_open(struct input_dev *dev) 1800 { 1801 struct hid_device *hid = input_get_drvdata(dev); 1802 1803 return hid_hw_open(hid); 1804 } 1805 1806 static void hidinput_close(struct input_dev *dev) 1807 { 1808 struct hid_device *hid = input_get_drvdata(dev); 1809 1810 hid_hw_close(hid); 1811 } 1812 1813 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid, 1814 struct hid_report *report, bool use_logical_max) 1815 { 1816 struct hid_usage *usage; 1817 bool update_needed = false; 1818 bool get_report_completed = false; 1819 int i, j; 1820 1821 if (report->maxfield == 0) 1822 return false; 1823 1824 for (i = 0; i < report->maxfield; i++) { 1825 __s32 value = use_logical_max ? 1826 report->field[i]->logical_maximum : 1827 report->field[i]->logical_minimum; 1828 1829 /* There is no good reason for a Resolution 1830 * Multiplier to have a count other than 1. 1831 * Ignore that case. 1832 */ 1833 if (report->field[i]->report_count != 1) 1834 continue; 1835 1836 for (j = 0; j < report->field[i]->maxusage; j++) { 1837 usage = &report->field[i]->usage[j]; 1838 1839 if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER) 1840 continue; 1841 1842 /* 1843 * If we have more than one feature within this 1844 * report we need to fill in the bits from the 1845 * others before we can overwrite the ones for the 1846 * Resolution Multiplier. 1847 * 1848 * But if we're not allowed to read from the device, 1849 * we just bail. Such a device should not exist 1850 * anyway. 1851 */ 1852 if (!get_report_completed && report->maxfield > 1) { 1853 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS) 1854 return update_needed; 1855 1856 hid_hw_request(hid, report, HID_REQ_GET_REPORT); 1857 hid_hw_wait(hid); 1858 get_report_completed = true; 1859 } 1860 1861 report->field[i]->value[j] = value; 1862 update_needed = true; 1863 } 1864 } 1865 1866 return update_needed; 1867 } 1868 1869 static void hidinput_change_resolution_multipliers(struct hid_device *hid) 1870 { 1871 struct hid_report_enum *rep_enum; 1872 struct hid_report *rep; 1873 int ret; 1874 1875 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1876 list_for_each_entry(rep, &rep_enum->report_list, list) { 1877 bool update_needed = __hidinput_change_resolution_multipliers(hid, 1878 rep, true); 1879 1880 if (update_needed) { 1881 ret = __hid_request(hid, rep, HID_REQ_SET_REPORT); 1882 if (ret) { 1883 __hidinput_change_resolution_multipliers(hid, 1884 rep, false); 1885 return; 1886 } 1887 } 1888 } 1889 1890 /* refresh our structs */ 1891 hid_setup_resolution_multiplier(hid); 1892 } 1893 1894 static void report_features(struct hid_device *hid) 1895 { 1896 struct hid_driver *drv = hid->driver; 1897 struct hid_report_enum *rep_enum; 1898 struct hid_report *rep; 1899 struct hid_usage *usage; 1900 int i, j; 1901 1902 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1903 list_for_each_entry(rep, &rep_enum->report_list, list) 1904 for (i = 0; i < rep->maxfield; i++) { 1905 /* Ignore if report count is out of bounds. */ 1906 if (rep->field[i]->report_count < 1) 1907 continue; 1908 1909 for (j = 0; j < rep->field[i]->maxusage; j++) { 1910 usage = &rep->field[i]->usage[j]; 1911 1912 /* Verify if Battery Strength feature is available */ 1913 if (usage->hid == HID_DC_BATTERYSTRENGTH) 1914 hidinput_setup_battery(hid, HID_FEATURE_REPORT, 1915 rep->field[i], false); 1916 1917 if (drv->feature_mapping) 1918 drv->feature_mapping(hid, rep->field[i], usage); 1919 } 1920 } 1921 } 1922 1923 static struct hid_input *hidinput_allocate(struct hid_device *hid, 1924 unsigned int application) 1925 { 1926 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1927 struct input_dev *input_dev = input_allocate_device(); 1928 const char *suffix = NULL; 1929 size_t suffix_len, name_len; 1930 1931 if (!hidinput || !input_dev) 1932 goto fail; 1933 1934 if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) && 1935 hid->maxapplication > 1) { 1936 switch (application) { 1937 case HID_GD_KEYBOARD: 1938 suffix = "Keyboard"; 1939 break; 1940 case HID_GD_KEYPAD: 1941 suffix = "Keypad"; 1942 break; 1943 case HID_GD_MOUSE: 1944 suffix = "Mouse"; 1945 break; 1946 case HID_DG_PEN: 1947 /* 1948 * yes, there is an issue here: 1949 * DG_PEN -> "Stylus" 1950 * DG_STYLUS -> "Pen" 1951 * But changing this now means users with config snippets 1952 * will have to change it and the test suite will not be happy. 1953 */ 1954 suffix = "Stylus"; 1955 break; 1956 case HID_DG_STYLUS: 1957 suffix = "Pen"; 1958 break; 1959 case HID_DG_TOUCHSCREEN: 1960 suffix = "Touchscreen"; 1961 break; 1962 case HID_DG_TOUCHPAD: 1963 suffix = "Touchpad"; 1964 break; 1965 case HID_GD_SYSTEM_CONTROL: 1966 suffix = "System Control"; 1967 break; 1968 case HID_CP_CONSUMER_CONTROL: 1969 suffix = "Consumer Control"; 1970 break; 1971 case HID_GD_WIRELESS_RADIO_CTLS: 1972 suffix = "Wireless Radio Control"; 1973 break; 1974 case HID_GD_SYSTEM_MULTIAXIS: 1975 suffix = "System Multi Axis"; 1976 break; 1977 default: 1978 break; 1979 } 1980 } 1981 1982 if (suffix) { 1983 name_len = strlen(hid->name); 1984 suffix_len = strlen(suffix); 1985 if ((name_len < suffix_len) || 1986 strcmp(hid->name + name_len - suffix_len, suffix)) { 1987 hidinput->name = kasprintf(GFP_KERNEL, "%s %s", 1988 hid->name, suffix); 1989 if (!hidinput->name) 1990 goto fail; 1991 } 1992 } 1993 1994 input_set_drvdata(input_dev, hid); 1995 input_dev->event = hidinput_input_event; 1996 input_dev->open = hidinput_open; 1997 input_dev->close = hidinput_close; 1998 input_dev->setkeycode = hidinput_setkeycode; 1999 input_dev->getkeycode = hidinput_getkeycode; 2000 2001 input_dev->name = hidinput->name ? hidinput->name : hid->name; 2002 input_dev->phys = hid->phys; 2003 input_dev->uniq = hid->uniq; 2004 input_dev->id.bustype = hid->bus; 2005 input_dev->id.vendor = hid->vendor; 2006 input_dev->id.product = hid->product; 2007 input_dev->id.version = hid->version; 2008 input_dev->dev.parent = &hid->dev; 2009 2010 hidinput->input = input_dev; 2011 hidinput->application = application; 2012 list_add_tail(&hidinput->list, &hid->inputs); 2013 2014 INIT_LIST_HEAD(&hidinput->reports); 2015 2016 return hidinput; 2017 2018 fail: 2019 kfree(hidinput); 2020 input_free_device(input_dev); 2021 hid_err(hid, "Out of memory during hid input probe\n"); 2022 return NULL; 2023 } 2024 2025 static bool hidinput_has_been_populated(struct hid_input *hidinput) 2026 { 2027 int i; 2028 unsigned long r = 0; 2029 2030 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 2031 r |= hidinput->input->evbit[i]; 2032 2033 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 2034 r |= hidinput->input->keybit[i]; 2035 2036 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 2037 r |= hidinput->input->relbit[i]; 2038 2039 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 2040 r |= hidinput->input->absbit[i]; 2041 2042 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 2043 r |= hidinput->input->mscbit[i]; 2044 2045 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 2046 r |= hidinput->input->ledbit[i]; 2047 2048 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 2049 r |= hidinput->input->sndbit[i]; 2050 2051 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 2052 r |= hidinput->input->ffbit[i]; 2053 2054 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 2055 r |= hidinput->input->swbit[i]; 2056 2057 return !!r; 2058 } 2059 2060 static void hidinput_cleanup_hidinput(struct hid_device *hid, 2061 struct hid_input *hidinput) 2062 { 2063 struct hid_report *report; 2064 int i, k; 2065 2066 list_del(&hidinput->list); 2067 input_free_device(hidinput->input); 2068 kfree(hidinput->name); 2069 2070 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2071 if (k == HID_OUTPUT_REPORT && 2072 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2073 continue; 2074 2075 list_for_each_entry(report, &hid->report_enum[k].report_list, 2076 list) { 2077 2078 for (i = 0; i < report->maxfield; i++) 2079 if (report->field[i]->hidinput == hidinput) 2080 report->field[i]->hidinput = NULL; 2081 } 2082 } 2083 2084 kfree(hidinput); 2085 } 2086 2087 static struct hid_input *hidinput_match(struct hid_report *report) 2088 { 2089 struct hid_device *hid = report->device; 2090 struct hid_input *hidinput; 2091 2092 list_for_each_entry(hidinput, &hid->inputs, list) { 2093 if (hidinput->report && 2094 hidinput->report->id == report->id) 2095 return hidinput; 2096 } 2097 2098 return NULL; 2099 } 2100 2101 static struct hid_input *hidinput_match_application(struct hid_report *report) 2102 { 2103 struct hid_device *hid = report->device; 2104 struct hid_input *hidinput; 2105 2106 list_for_each_entry(hidinput, &hid->inputs, list) { 2107 if (hidinput->application == report->application) 2108 return hidinput; 2109 2110 /* 2111 * Keep SystemControl and ConsumerControl applications together 2112 * with the main keyboard, if present. 2113 */ 2114 if ((report->application == HID_GD_SYSTEM_CONTROL || 2115 report->application == HID_CP_CONSUMER_CONTROL) && 2116 hidinput->application == HID_GD_KEYBOARD) { 2117 return hidinput; 2118 } 2119 } 2120 2121 return NULL; 2122 } 2123 2124 static inline void hidinput_configure_usages(struct hid_input *hidinput, 2125 struct hid_report *report) 2126 { 2127 int i, j, k; 2128 int first_field_index = 0; 2129 int slot_collection_index = -1; 2130 int prev_collection_index = -1; 2131 unsigned int slot_idx = 0; 2132 struct hid_field *field; 2133 2134 /* 2135 * First tag all the fields that are part of a slot, 2136 * a slot needs to have one Contact ID in the collection 2137 */ 2138 for (i = 0; i < report->maxfield; i++) { 2139 field = report->field[i]; 2140 2141 /* ignore fields without usage */ 2142 if (field->maxusage < 1) 2143 continue; 2144 2145 /* 2146 * janitoring when collection_index changes 2147 */ 2148 if (prev_collection_index != field->usage->collection_index) { 2149 prev_collection_index = field->usage->collection_index; 2150 first_field_index = i; 2151 } 2152 2153 /* 2154 * if we already found a Contact ID in the collection, 2155 * tag and continue to the next. 2156 */ 2157 if (slot_collection_index == field->usage->collection_index) { 2158 field->slot_idx = slot_idx; 2159 continue; 2160 } 2161 2162 /* check if the current field has Contact ID */ 2163 for (j = 0; j < field->maxusage; j++) { 2164 if (field->usage[j].hid == HID_DG_CONTACTID) { 2165 slot_collection_index = field->usage->collection_index; 2166 slot_idx++; 2167 2168 /* 2169 * mark all previous fields and this one in the 2170 * current collection to be slotted. 2171 */ 2172 for (k = first_field_index; k <= i; k++) 2173 report->field[k]->slot_idx = slot_idx; 2174 break; 2175 } 2176 } 2177 } 2178 2179 for (i = 0; i < report->maxfield; i++) 2180 for (j = 0; j < report->field[i]->maxusage; j++) 2181 hidinput_configure_usage(hidinput, report->field[i], 2182 report->field[i]->usage + j, 2183 j); 2184 } 2185 2186 /* 2187 * Register the input device; print a message. 2188 * Configure the input layer interface 2189 * Read all reports and initialize the absolute field values. 2190 */ 2191 2192 int hidinput_connect(struct hid_device *hid, unsigned int force) 2193 { 2194 struct hid_driver *drv = hid->driver; 2195 struct hid_report *report; 2196 struct hid_input *next, *hidinput = NULL; 2197 unsigned int application; 2198 int i, k; 2199 2200 INIT_LIST_HEAD(&hid->inputs); 2201 INIT_WORK(&hid->led_work, hidinput_led_worker); 2202 2203 hid->status &= ~HID_STAT_DUP_DETECTED; 2204 2205 if (!force) { 2206 for (i = 0; i < hid->maxcollection; i++) { 2207 struct hid_collection *col = &hid->collection[i]; 2208 if (col->type == HID_COLLECTION_APPLICATION || 2209 col->type == HID_COLLECTION_PHYSICAL) 2210 if (IS_INPUT_APPLICATION(col->usage)) 2211 break; 2212 } 2213 2214 if (i == hid->maxcollection) 2215 return -1; 2216 } 2217 2218 report_features(hid); 2219 2220 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 2221 if (k == HID_OUTPUT_REPORT && 2222 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 2223 continue; 2224 2225 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 2226 2227 if (!report->maxfield) 2228 continue; 2229 2230 application = report->application; 2231 2232 /* 2233 * Find the previous hidinput report attached 2234 * to this report id. 2235 */ 2236 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2237 hidinput = hidinput_match(report); 2238 else if (hid->maxapplication > 1 && 2239 (hid->quirks & HID_QUIRK_INPUT_PER_APP)) 2240 hidinput = hidinput_match_application(report); 2241 2242 if (!hidinput) { 2243 hidinput = hidinput_allocate(hid, application); 2244 if (!hidinput) 2245 goto out_unwind; 2246 } 2247 2248 hidinput_configure_usages(hidinput, report); 2249 2250 if (hid->quirks & HID_QUIRK_MULTI_INPUT) 2251 hidinput->report = report; 2252 2253 list_add_tail(&report->hidinput_list, 2254 &hidinput->reports); 2255 } 2256 } 2257 2258 hidinput_change_resolution_multipliers(hid); 2259 2260 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2261 if (drv->input_configured && 2262 drv->input_configured(hid, hidinput)) 2263 goto out_unwind; 2264 2265 if (!hidinput_has_been_populated(hidinput)) { 2266 /* no need to register an input device not populated */ 2267 hidinput_cleanup_hidinput(hid, hidinput); 2268 continue; 2269 } 2270 2271 if (input_register_device(hidinput->input)) 2272 goto out_unwind; 2273 hidinput->registered = true; 2274 } 2275 2276 if (list_empty(&hid->inputs)) { 2277 hid_err(hid, "No inputs registered, leaving\n"); 2278 goto out_unwind; 2279 } 2280 2281 if (hid->status & HID_STAT_DUP_DETECTED) 2282 hid_dbg(hid, 2283 "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n"); 2284 2285 return 0; 2286 2287 out_unwind: 2288 /* unwind the ones we already registered */ 2289 hidinput_disconnect(hid); 2290 2291 return -1; 2292 } 2293 EXPORT_SYMBOL_GPL(hidinput_connect); 2294 2295 void hidinput_disconnect(struct hid_device *hid) 2296 { 2297 struct hid_input *hidinput, *next; 2298 2299 hidinput_cleanup_battery(hid); 2300 2301 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 2302 list_del(&hidinput->list); 2303 if (hidinput->registered) 2304 input_unregister_device(hidinput->input); 2305 else 2306 input_free_device(hidinput->input); 2307 kfree(hidinput->name); 2308 kfree(hidinput); 2309 } 2310 2311 /* led_work is spawned by input_dev callbacks, but doesn't access the 2312 * parent input_dev at all. Once all input devices are removed, we 2313 * know that led_work will never get restarted, so we can cancel it 2314 * synchronously and are safe. */ 2315 cancel_work_sync(&hid->led_work); 2316 } 2317 EXPORT_SYMBOL_GPL(hidinput_disconnect); 2318