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