1 /* 2 * Copyright (c) 2000-2001 Vojtech Pavlik 3 * Copyright (c) 2006-2010 Jiri Kosina 4 * 5 * HID to Linux Input mapping 6 */ 7 8 /* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * Should you need to contact me, the author, you can do so either by 24 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 25 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 26 */ 27 28 #include <linux/module.h> 29 #include <linux/slab.h> 30 #include <linux/kernel.h> 31 32 #include <linux/hid.h> 33 #include <linux/hid-debug.h> 34 35 #include "hid-ids.h" 36 37 #define unk KEY_UNKNOWN 38 39 static const unsigned char hid_keyboard[256] = { 40 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, 41 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, 42 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, 43 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, 44 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, 45 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, 46 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, 47 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, 48 115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk, 49 122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk, 50 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 51 unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk, 52 unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk, 53 unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk, 54 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, 55 150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk 56 }; 57 58 static const struct { 59 __s32 x; 60 __s32 y; 61 } hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; 62 63 #define map_abs(c) hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c)) 64 #define map_rel(c) hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c)) 65 #define map_key(c) hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c)) 66 #define map_led(c) hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c)) 67 68 #define map_abs_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 69 &max, EV_ABS, (c)) 70 #define map_key_clear(c) hid_map_usage_clear(hidinput, usage, &bit, \ 71 &max, EV_KEY, (c)) 72 73 static bool match_scancode(struct hid_usage *usage, 74 unsigned int cur_idx, unsigned int scancode) 75 { 76 return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode; 77 } 78 79 static bool match_keycode(struct hid_usage *usage, 80 unsigned int cur_idx, unsigned int keycode) 81 { 82 /* 83 * We should exclude unmapped usages when doing lookup by keycode. 84 */ 85 return (usage->type == EV_KEY && usage->code == keycode); 86 } 87 88 static bool match_index(struct hid_usage *usage, 89 unsigned int cur_idx, unsigned int idx) 90 { 91 return cur_idx == idx; 92 } 93 94 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage, 95 unsigned int cur_idx, unsigned int val); 96 97 static struct hid_usage *hidinput_find_key(struct hid_device *hid, 98 hid_usage_cmp_t match, 99 unsigned int value, 100 unsigned int *usage_idx) 101 { 102 unsigned int i, j, k, cur_idx = 0; 103 struct hid_report *report; 104 struct hid_usage *usage; 105 106 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 107 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 108 for (i = 0; i < report->maxfield; i++) { 109 for (j = 0; j < report->field[i]->maxusage; j++) { 110 usage = report->field[i]->usage + j; 111 if (usage->type == EV_KEY || usage->type == 0) { 112 if (match(usage, cur_idx, value)) { 113 if (usage_idx) 114 *usage_idx = cur_idx; 115 return usage; 116 } 117 cur_idx++; 118 } 119 } 120 } 121 } 122 } 123 return NULL; 124 } 125 126 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid, 127 const struct input_keymap_entry *ke, 128 unsigned int *index) 129 { 130 struct hid_usage *usage; 131 unsigned int scancode; 132 133 if (ke->flags & INPUT_KEYMAP_BY_INDEX) 134 usage = hidinput_find_key(hid, match_index, ke->index, index); 135 else if (input_scancode_to_scalar(ke, &scancode) == 0) 136 usage = hidinput_find_key(hid, match_scancode, scancode, index); 137 else 138 usage = NULL; 139 140 return usage; 141 } 142 143 static int hidinput_getkeycode(struct input_dev *dev, 144 struct input_keymap_entry *ke) 145 { 146 struct hid_device *hid = input_get_drvdata(dev); 147 struct hid_usage *usage; 148 unsigned int scancode, index; 149 150 usage = hidinput_locate_usage(hid, ke, &index); 151 if (usage) { 152 ke->keycode = usage->type == EV_KEY ? 153 usage->code : KEY_RESERVED; 154 ke->index = index; 155 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE); 156 ke->len = sizeof(scancode); 157 memcpy(ke->scancode, &scancode, sizeof(scancode)); 158 return 0; 159 } 160 161 return -EINVAL; 162 } 163 164 static int hidinput_setkeycode(struct input_dev *dev, 165 const struct input_keymap_entry *ke, 166 unsigned int *old_keycode) 167 { 168 struct hid_device *hid = input_get_drvdata(dev); 169 struct hid_usage *usage; 170 171 usage = hidinput_locate_usage(hid, ke, NULL); 172 if (usage) { 173 *old_keycode = usage->type == EV_KEY ? 174 usage->code : KEY_RESERVED; 175 usage->code = ke->keycode; 176 177 clear_bit(*old_keycode, dev->keybit); 178 set_bit(usage->code, dev->keybit); 179 dbg_hid("Assigned keycode %d to HID usage code %x\n", 180 usage->code, usage->hid); 181 182 /* 183 * Set the keybit for the old keycode if the old keycode is used 184 * by another key 185 */ 186 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL)) 187 set_bit(*old_keycode, dev->keybit); 188 189 return 0; 190 } 191 192 return -EINVAL; 193 } 194 195 196 /** 197 * hidinput_calc_abs_res - calculate an absolute axis resolution 198 * @field: the HID report field to calculate resolution for 199 * @code: axis code 200 * 201 * The formula is: 202 * (logical_maximum - logical_minimum) 203 * resolution = ---------------------------------------------------------- 204 * (physical_maximum - physical_minimum) * 10 ^ unit_exponent 205 * 206 * as seen in the HID specification v1.11 6.2.2.7 Global Items. 207 * 208 * Only exponent 1 length units are processed. Centimeters and inches are 209 * converted to millimeters. Degrees are converted to radians. 210 */ 211 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code) 212 { 213 __s32 unit_exponent = field->unit_exponent; 214 __s32 logical_extents = field->logical_maximum - 215 field->logical_minimum; 216 __s32 physical_extents = field->physical_maximum - 217 field->physical_minimum; 218 __s32 prev; 219 220 /* Check if the extents are sane */ 221 if (logical_extents <= 0 || physical_extents <= 0) 222 return 0; 223 224 /* 225 * Verify and convert units. 226 * See HID specification v1.11 6.2.2.7 Global Items for unit decoding 227 */ 228 switch (code) { 229 case ABS_X: 230 case ABS_Y: 231 case ABS_Z: 232 case ABS_MT_POSITION_X: 233 case ABS_MT_POSITION_Y: 234 case ABS_MT_TOOL_X: 235 case ABS_MT_TOOL_Y: 236 case ABS_MT_TOUCH_MAJOR: 237 case ABS_MT_TOUCH_MINOR: 238 if (field->unit == 0x11) { /* If centimeters */ 239 /* Convert to millimeters */ 240 unit_exponent += 1; 241 } else if (field->unit == 0x13) { /* If inches */ 242 /* Convert to millimeters */ 243 prev = physical_extents; 244 physical_extents *= 254; 245 if (physical_extents < prev) 246 return 0; 247 unit_exponent -= 1; 248 } else { 249 return 0; 250 } 251 break; 252 253 case ABS_RX: 254 case ABS_RY: 255 case ABS_RZ: 256 case ABS_TILT_X: 257 case ABS_TILT_Y: 258 if (field->unit == 0x14) { /* If degrees */ 259 /* Convert to radians */ 260 prev = logical_extents; 261 logical_extents *= 573; 262 if (logical_extents < prev) 263 return 0; 264 unit_exponent += 1; 265 } else if (field->unit != 0x12) { /* If not radians */ 266 return 0; 267 } 268 break; 269 270 default: 271 return 0; 272 } 273 274 /* Apply negative unit exponent */ 275 for (; unit_exponent < 0; unit_exponent++) { 276 prev = logical_extents; 277 logical_extents *= 10; 278 if (logical_extents < prev) 279 return 0; 280 } 281 /* Apply positive unit exponent */ 282 for (; unit_exponent > 0; unit_exponent--) { 283 prev = physical_extents; 284 physical_extents *= 10; 285 if (physical_extents < prev) 286 return 0; 287 } 288 289 /* Calculate resolution */ 290 return DIV_ROUND_CLOSEST(logical_extents, physical_extents); 291 } 292 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res); 293 294 #ifdef CONFIG_HID_BATTERY_STRENGTH 295 static enum power_supply_property hidinput_battery_props[] = { 296 POWER_SUPPLY_PROP_PRESENT, 297 POWER_SUPPLY_PROP_ONLINE, 298 POWER_SUPPLY_PROP_CAPACITY, 299 POWER_SUPPLY_PROP_MODEL_NAME, 300 POWER_SUPPLY_PROP_STATUS, 301 POWER_SUPPLY_PROP_SCOPE, 302 }; 303 304 #define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */ 305 #define HID_BATTERY_QUIRK_FEATURE (1 << 1) /* ask for feature report */ 306 307 static const struct hid_device_id hid_battery_quirks[] = { 308 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 309 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO), 310 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 311 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 312 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI), 313 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 314 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, 315 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI), 316 HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE }, 317 {} 318 }; 319 320 static unsigned find_battery_quirk(struct hid_device *hdev) 321 { 322 unsigned quirks = 0; 323 const struct hid_device_id *match; 324 325 match = hid_match_id(hdev, hid_battery_quirks); 326 if (match != NULL) 327 quirks = match->driver_data; 328 329 return quirks; 330 } 331 332 static int hidinput_get_battery_property(struct power_supply *psy, 333 enum power_supply_property prop, 334 union power_supply_propval *val) 335 { 336 struct hid_device *dev = container_of(psy, struct hid_device, battery); 337 int ret = 0; 338 __u8 *buf; 339 340 switch (prop) { 341 case POWER_SUPPLY_PROP_PRESENT: 342 case POWER_SUPPLY_PROP_ONLINE: 343 val->intval = 1; 344 break; 345 346 case POWER_SUPPLY_PROP_CAPACITY: 347 348 buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL); 349 if (!buf) { 350 ret = -ENOMEM; 351 break; 352 } 353 ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2, 354 dev->battery_report_type, 355 HID_REQ_GET_REPORT); 356 357 if (ret != 2) { 358 ret = -ENODATA; 359 kfree(buf); 360 break; 361 } 362 ret = 0; 363 364 if (dev->battery_min < dev->battery_max && 365 buf[1] >= dev->battery_min && 366 buf[1] <= dev->battery_max) 367 val->intval = (100 * (buf[1] - dev->battery_min)) / 368 (dev->battery_max - dev->battery_min); 369 kfree(buf); 370 break; 371 372 case POWER_SUPPLY_PROP_MODEL_NAME: 373 val->strval = dev->name; 374 break; 375 376 case POWER_SUPPLY_PROP_STATUS: 377 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 378 break; 379 380 case POWER_SUPPLY_PROP_SCOPE: 381 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 382 break; 383 384 default: 385 ret = -EINVAL; 386 break; 387 } 388 389 return ret; 390 } 391 392 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field) 393 { 394 struct power_supply *battery = &dev->battery; 395 int ret; 396 unsigned quirks; 397 s32 min, max; 398 399 if (field->usage->hid != HID_DC_BATTERYSTRENGTH) 400 return false; /* no match */ 401 402 if (battery->name != NULL) 403 goto out; /* already initialized? */ 404 405 battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq); 406 if (battery->name == NULL) 407 goto out; 408 409 battery->type = POWER_SUPPLY_TYPE_BATTERY; 410 battery->properties = hidinput_battery_props; 411 battery->num_properties = ARRAY_SIZE(hidinput_battery_props); 412 battery->use_for_apm = 0; 413 battery->get_property = hidinput_get_battery_property; 414 415 quirks = find_battery_quirk(dev); 416 417 hid_dbg(dev, "device %x:%x:%x %d quirks %d\n", 418 dev->bus, dev->vendor, dev->product, dev->version, quirks); 419 420 min = field->logical_minimum; 421 max = field->logical_maximum; 422 423 if (quirks & HID_BATTERY_QUIRK_PERCENT) { 424 min = 0; 425 max = 100; 426 } 427 428 if (quirks & HID_BATTERY_QUIRK_FEATURE) 429 report_type = HID_FEATURE_REPORT; 430 431 dev->battery_min = min; 432 dev->battery_max = max; 433 dev->battery_report_type = report_type; 434 dev->battery_report_id = field->report->id; 435 436 ret = power_supply_register(&dev->dev, battery); 437 if (ret != 0) { 438 hid_warn(dev, "can't register power supply: %d\n", ret); 439 kfree(battery->name); 440 battery->name = NULL; 441 } 442 443 power_supply_powers(battery, &dev->dev); 444 445 out: 446 return true; 447 } 448 449 static void hidinput_cleanup_battery(struct hid_device *dev) 450 { 451 if (!dev->battery.name) 452 return; 453 454 power_supply_unregister(&dev->battery); 455 kfree(dev->battery.name); 456 dev->battery.name = NULL; 457 } 458 #else /* !CONFIG_HID_BATTERY_STRENGTH */ 459 static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, 460 struct hid_field *field) 461 { 462 return false; 463 } 464 465 static void hidinput_cleanup_battery(struct hid_device *dev) 466 { 467 } 468 #endif /* CONFIG_HID_BATTERY_STRENGTH */ 469 470 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field, 471 struct hid_usage *usage) 472 { 473 struct input_dev *input = hidinput->input; 474 struct hid_device *device = input_get_drvdata(input); 475 int max = 0, code; 476 unsigned long *bit = NULL; 477 478 field->hidinput = hidinput; 479 480 if (field->flags & HID_MAIN_ITEM_CONSTANT) 481 goto ignore; 482 483 /* Ignore if report count is out of bounds. */ 484 if (field->report_count < 1) 485 goto ignore; 486 487 /* only LED usages are supported in output fields */ 488 if (field->report_type == HID_OUTPUT_REPORT && 489 (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) { 490 goto ignore; 491 } 492 493 if (device->driver->input_mapping) { 494 int ret = device->driver->input_mapping(device, hidinput, field, 495 usage, &bit, &max); 496 if (ret > 0) 497 goto mapped; 498 if (ret < 0) 499 goto ignore; 500 } 501 502 switch (usage->hid & HID_USAGE_PAGE) { 503 case HID_UP_UNDEFINED: 504 goto ignore; 505 506 case HID_UP_KEYBOARD: 507 set_bit(EV_REP, input->evbit); 508 509 if ((usage->hid & HID_USAGE) < 256) { 510 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore; 511 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]); 512 } else 513 map_key(KEY_UNKNOWN); 514 515 break; 516 517 case HID_UP_BUTTON: 518 code = ((usage->hid - 1) & HID_USAGE); 519 520 switch (field->application) { 521 case HID_GD_MOUSE: 522 case HID_GD_POINTER: code += BTN_MOUSE; break; 523 case HID_GD_JOYSTICK: 524 if (code <= 0xf) 525 code += BTN_JOYSTICK; 526 else 527 code += BTN_TRIGGER_HAPPY - 0x10; 528 break; 529 case HID_GD_GAMEPAD: 530 if (code <= 0xf) 531 code += BTN_GAMEPAD; 532 else 533 code += BTN_TRIGGER_HAPPY - 0x10; 534 break; 535 default: 536 switch (field->physical) { 537 case HID_GD_MOUSE: 538 case HID_GD_POINTER: code += BTN_MOUSE; break; 539 case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break; 540 case HID_GD_GAMEPAD: code += BTN_GAMEPAD; break; 541 default: code += BTN_MISC; 542 } 543 } 544 545 map_key(code); 546 break; 547 548 case HID_UP_SIMULATION: 549 switch (usage->hid & 0xffff) { 550 case 0xba: map_abs(ABS_RUDDER); break; 551 case 0xbb: map_abs(ABS_THROTTLE); break; 552 case 0xc4: map_abs(ABS_GAS); break; 553 case 0xc5: map_abs(ABS_BRAKE); break; 554 case 0xc8: map_abs(ABS_WHEEL); break; 555 default: goto ignore; 556 } 557 break; 558 559 case HID_UP_GENDESK: 560 if ((usage->hid & 0xf0) == 0x80) { /* SystemControl */ 561 switch (usage->hid & 0xf) { 562 case 0x1: map_key_clear(KEY_POWER); break; 563 case 0x2: map_key_clear(KEY_SLEEP); break; 564 case 0x3: map_key_clear(KEY_WAKEUP); break; 565 case 0x4: map_key_clear(KEY_CONTEXT_MENU); break; 566 case 0x5: map_key_clear(KEY_MENU); break; 567 case 0x6: map_key_clear(KEY_PROG1); break; 568 case 0x7: map_key_clear(KEY_HELP); break; 569 case 0x8: map_key_clear(KEY_EXIT); break; 570 case 0x9: map_key_clear(KEY_SELECT); break; 571 case 0xa: map_key_clear(KEY_RIGHT); break; 572 case 0xb: map_key_clear(KEY_LEFT); break; 573 case 0xc: map_key_clear(KEY_UP); break; 574 case 0xd: map_key_clear(KEY_DOWN); break; 575 case 0xe: map_key_clear(KEY_POWER2); break; 576 case 0xf: map_key_clear(KEY_RESTART); break; 577 default: goto unknown; 578 } 579 break; 580 } 581 582 if ((usage->hid & 0xf0) == 0x90) { /* D-pad */ 583 switch (usage->hid) { 584 case HID_GD_UP: usage->hat_dir = 1; break; 585 case HID_GD_DOWN: usage->hat_dir = 5; break; 586 case HID_GD_RIGHT: usage->hat_dir = 3; break; 587 case HID_GD_LEFT: usage->hat_dir = 7; break; 588 default: goto unknown; 589 } 590 if (field->dpad) { 591 map_abs(field->dpad); 592 goto ignore; 593 } 594 map_abs(ABS_HAT0X); 595 break; 596 } 597 598 switch (usage->hid) { 599 /* These usage IDs map directly to the usage codes. */ 600 case HID_GD_X: case HID_GD_Y: case HID_GD_Z: 601 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ: 602 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL: 603 if (field->flags & HID_MAIN_ITEM_RELATIVE) 604 map_rel(usage->hid & 0xf); 605 else 606 map_abs(usage->hid & 0xf); 607 break; 608 609 case HID_GD_HATSWITCH: 610 usage->hat_min = field->logical_minimum; 611 usage->hat_max = field->logical_maximum; 612 map_abs(ABS_HAT0X); 613 break; 614 615 case HID_GD_START: map_key_clear(BTN_START); break; 616 case HID_GD_SELECT: map_key_clear(BTN_SELECT); break; 617 618 default: goto unknown; 619 } 620 621 break; 622 623 case HID_UP_LED: 624 switch (usage->hid & 0xffff) { /* HID-Value: */ 625 case 0x01: map_led (LED_NUML); break; /* "Num Lock" */ 626 case 0x02: map_led (LED_CAPSL); break; /* "Caps Lock" */ 627 case 0x03: map_led (LED_SCROLLL); break; /* "Scroll Lock" */ 628 case 0x04: map_led (LED_COMPOSE); break; /* "Compose" */ 629 case 0x05: map_led (LED_KANA); break; /* "Kana" */ 630 case 0x27: map_led (LED_SLEEP); break; /* "Stand-By" */ 631 case 0x4c: map_led (LED_SUSPEND); break; /* "System Suspend" */ 632 case 0x09: map_led (LED_MUTE); break; /* "Mute" */ 633 case 0x4b: map_led (LED_MISC); break; /* "Generic Indicator" */ 634 case 0x19: map_led (LED_MAIL); break; /* "Message Waiting" */ 635 case 0x4d: map_led (LED_CHARGING); break; /* "External Power Connected" */ 636 637 default: goto ignore; 638 } 639 break; 640 641 case HID_UP_DIGITIZER: 642 switch (usage->hid & 0xff) { 643 case 0x00: /* Undefined */ 644 goto ignore; 645 646 case 0x30: /* TipPressure */ 647 if (!test_bit(BTN_TOUCH, input->keybit)) { 648 device->quirks |= HID_QUIRK_NOTOUCH; 649 set_bit(EV_KEY, input->evbit); 650 set_bit(BTN_TOUCH, input->keybit); 651 } 652 map_abs_clear(ABS_PRESSURE); 653 break; 654 655 case 0x32: /* InRange */ 656 switch (field->physical & 0xff) { 657 case 0x21: map_key(BTN_TOOL_MOUSE); break; 658 case 0x22: map_key(BTN_TOOL_FINGER); break; 659 default: map_key(BTN_TOOL_PEN); break; 660 } 661 break; 662 663 case 0x3c: /* Invert */ 664 map_key_clear(BTN_TOOL_RUBBER); 665 break; 666 667 case 0x3d: /* X Tilt */ 668 map_abs_clear(ABS_TILT_X); 669 break; 670 671 case 0x3e: /* Y Tilt */ 672 map_abs_clear(ABS_TILT_Y); 673 break; 674 675 case 0x33: /* Touch */ 676 case 0x42: /* TipSwitch */ 677 case 0x43: /* TipSwitch2 */ 678 device->quirks &= ~HID_QUIRK_NOTOUCH; 679 map_key_clear(BTN_TOUCH); 680 break; 681 682 case 0x44: /* BarrelSwitch */ 683 map_key_clear(BTN_STYLUS); 684 break; 685 686 case 0x46: /* TabletPick */ 687 case 0x5a: /* SecondaryBarrelSwitch */ 688 map_key_clear(BTN_STYLUS2); 689 break; 690 691 case 0x5b: /* TransducerSerialNumber */ 692 set_bit(MSC_SERIAL, input->mscbit); 693 break; 694 695 default: goto unknown; 696 } 697 break; 698 699 case HID_UP_CONSUMER: /* USB HUT v1.12, pages 75-84 */ 700 switch (usage->hid & HID_USAGE) { 701 case 0x000: goto ignore; 702 case 0x030: map_key_clear(KEY_POWER); break; 703 case 0x031: map_key_clear(KEY_RESTART); break; 704 case 0x032: map_key_clear(KEY_SLEEP); break; 705 case 0x034: map_key_clear(KEY_SLEEP); break; 706 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE); break; 707 case 0x036: map_key_clear(BTN_MISC); break; 708 709 case 0x040: map_key_clear(KEY_MENU); break; /* Menu */ 710 case 0x041: map_key_clear(KEY_SELECT); break; /* Menu Pick */ 711 case 0x042: map_key_clear(KEY_UP); break; /* Menu Up */ 712 case 0x043: map_key_clear(KEY_DOWN); break; /* Menu Down */ 713 case 0x044: map_key_clear(KEY_LEFT); break; /* Menu Left */ 714 case 0x045: map_key_clear(KEY_RIGHT); break; /* Menu Right */ 715 case 0x046: map_key_clear(KEY_ESC); break; /* Menu Escape */ 716 case 0x047: map_key_clear(KEY_KPPLUS); break; /* Menu Value Increase */ 717 case 0x048: map_key_clear(KEY_KPMINUS); break; /* Menu Value Decrease */ 718 719 case 0x060: map_key_clear(KEY_INFO); break; /* Data On Screen */ 720 case 0x061: map_key_clear(KEY_SUBTITLE); break; /* Closed Caption */ 721 case 0x063: map_key_clear(KEY_VCR); break; /* VCR/TV */ 722 case 0x065: map_key_clear(KEY_CAMERA); break; /* Snapshot */ 723 case 0x069: map_key_clear(KEY_RED); break; 724 case 0x06a: map_key_clear(KEY_GREEN); break; 725 case 0x06b: map_key_clear(KEY_BLUE); break; 726 case 0x06c: map_key_clear(KEY_YELLOW); break; 727 case 0x06d: map_key_clear(KEY_ZOOM); break; 728 729 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP); break; 730 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN); break; 731 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE); break; 732 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN); break; 733 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX); break; 734 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO); break; 735 736 case 0x082: map_key_clear(KEY_VIDEO_NEXT); break; 737 case 0x083: map_key_clear(KEY_LAST); break; 738 case 0x084: map_key_clear(KEY_ENTER); break; 739 case 0x088: map_key_clear(KEY_PC); break; 740 case 0x089: map_key_clear(KEY_TV); break; 741 case 0x08a: map_key_clear(KEY_WWW); break; 742 case 0x08b: map_key_clear(KEY_DVD); break; 743 case 0x08c: map_key_clear(KEY_PHONE); break; 744 case 0x08d: map_key_clear(KEY_PROGRAM); break; 745 case 0x08e: map_key_clear(KEY_VIDEOPHONE); break; 746 case 0x08f: map_key_clear(KEY_GAMES); break; 747 case 0x090: map_key_clear(KEY_MEMO); break; 748 case 0x091: map_key_clear(KEY_CD); break; 749 case 0x092: map_key_clear(KEY_VCR); break; 750 case 0x093: map_key_clear(KEY_TUNER); break; 751 case 0x094: map_key_clear(KEY_EXIT); break; 752 case 0x095: map_key_clear(KEY_HELP); break; 753 case 0x096: map_key_clear(KEY_TAPE); break; 754 case 0x097: map_key_clear(KEY_TV2); break; 755 case 0x098: map_key_clear(KEY_SAT); break; 756 case 0x09a: map_key_clear(KEY_PVR); break; 757 758 case 0x09c: map_key_clear(KEY_CHANNELUP); break; 759 case 0x09d: map_key_clear(KEY_CHANNELDOWN); break; 760 case 0x0a0: map_key_clear(KEY_VCR2); break; 761 762 case 0x0b0: map_key_clear(KEY_PLAY); break; 763 case 0x0b1: map_key_clear(KEY_PAUSE); break; 764 case 0x0b2: map_key_clear(KEY_RECORD); break; 765 case 0x0b3: map_key_clear(KEY_FASTFORWARD); break; 766 case 0x0b4: map_key_clear(KEY_REWIND); break; 767 case 0x0b5: map_key_clear(KEY_NEXTSONG); break; 768 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG); break; 769 case 0x0b7: map_key_clear(KEY_STOPCD); break; 770 case 0x0b8: map_key_clear(KEY_EJECTCD); break; 771 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT); break; 772 case 0x0b9: map_key_clear(KEY_SHUFFLE); break; 773 case 0x0bf: map_key_clear(KEY_SLOW); break; 774 775 case 0x0cd: map_key_clear(KEY_PLAYPAUSE); break; 776 case 0x0cf: map_key_clear(KEY_VOICECOMMAND); break; 777 case 0x0e0: map_abs_clear(ABS_VOLUME); break; 778 case 0x0e2: map_key_clear(KEY_MUTE); break; 779 case 0x0e5: map_key_clear(KEY_BASSBOOST); break; 780 case 0x0e9: map_key_clear(KEY_VOLUMEUP); break; 781 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN); break; 782 case 0x0f5: map_key_clear(KEY_SLOW); break; 783 784 case 0x181: map_key_clear(KEY_BUTTONCONFIG); break; 785 case 0x182: map_key_clear(KEY_BOOKMARKS); break; 786 case 0x183: map_key_clear(KEY_CONFIG); break; 787 case 0x184: map_key_clear(KEY_WORDPROCESSOR); break; 788 case 0x185: map_key_clear(KEY_EDITOR); break; 789 case 0x186: map_key_clear(KEY_SPREADSHEET); break; 790 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR); break; 791 case 0x188: map_key_clear(KEY_PRESENTATION); break; 792 case 0x189: map_key_clear(KEY_DATABASE); break; 793 case 0x18a: map_key_clear(KEY_MAIL); break; 794 case 0x18b: map_key_clear(KEY_NEWS); break; 795 case 0x18c: map_key_clear(KEY_VOICEMAIL); break; 796 case 0x18d: map_key_clear(KEY_ADDRESSBOOK); break; 797 case 0x18e: map_key_clear(KEY_CALENDAR); break; 798 case 0x18f: map_key_clear(KEY_TASKMANAGER); break; 799 case 0x190: map_key_clear(KEY_JOURNAL); break; 800 case 0x191: map_key_clear(KEY_FINANCE); break; 801 case 0x192: map_key_clear(KEY_CALC); break; 802 case 0x193: map_key_clear(KEY_PLAYER); break; 803 case 0x194: map_key_clear(KEY_FILE); break; 804 case 0x196: map_key_clear(KEY_WWW); break; 805 case 0x199: map_key_clear(KEY_CHAT); break; 806 case 0x19c: map_key_clear(KEY_LOGOFF); break; 807 case 0x19e: map_key_clear(KEY_COFFEE); break; 808 case 0x19f: map_key_clear(KEY_CONTROLPANEL); break; 809 case 0x1a2: map_key_clear(KEY_APPSELECT); break; 810 case 0x1a3: map_key_clear(KEY_NEXT); break; 811 case 0x1a4: map_key_clear(KEY_PREVIOUS); break; 812 case 0x1a6: map_key_clear(KEY_HELP); break; 813 case 0x1a7: map_key_clear(KEY_DOCUMENTS); break; 814 case 0x1ab: map_key_clear(KEY_SPELLCHECK); break; 815 case 0x1ae: map_key_clear(KEY_KEYBOARD); break; 816 case 0x1b1: map_key_clear(KEY_SCREENSAVER); break; 817 case 0x1b4: map_key_clear(KEY_FILE); break; 818 case 0x1b6: map_key_clear(KEY_IMAGES); break; 819 case 0x1b7: map_key_clear(KEY_AUDIO); break; 820 case 0x1b8: map_key_clear(KEY_VIDEO); break; 821 case 0x1bc: map_key_clear(KEY_MESSENGER); break; 822 case 0x1bd: map_key_clear(KEY_INFO); break; 823 case 0x201: map_key_clear(KEY_NEW); break; 824 case 0x202: map_key_clear(KEY_OPEN); break; 825 case 0x203: map_key_clear(KEY_CLOSE); break; 826 case 0x204: map_key_clear(KEY_EXIT); break; 827 case 0x207: map_key_clear(KEY_SAVE); break; 828 case 0x208: map_key_clear(KEY_PRINT); break; 829 case 0x209: map_key_clear(KEY_PROPS); break; 830 case 0x21a: map_key_clear(KEY_UNDO); break; 831 case 0x21b: map_key_clear(KEY_COPY); break; 832 case 0x21c: map_key_clear(KEY_CUT); break; 833 case 0x21d: map_key_clear(KEY_PASTE); break; 834 case 0x21f: map_key_clear(KEY_FIND); break; 835 case 0x221: map_key_clear(KEY_SEARCH); break; 836 case 0x222: map_key_clear(KEY_GOTO); break; 837 case 0x223: map_key_clear(KEY_HOMEPAGE); break; 838 case 0x224: map_key_clear(KEY_BACK); break; 839 case 0x225: map_key_clear(KEY_FORWARD); break; 840 case 0x226: map_key_clear(KEY_STOP); break; 841 case 0x227: map_key_clear(KEY_REFRESH); break; 842 case 0x22a: map_key_clear(KEY_BOOKMARKS); break; 843 case 0x22d: map_key_clear(KEY_ZOOMIN); break; 844 case 0x22e: map_key_clear(KEY_ZOOMOUT); break; 845 case 0x22f: map_key_clear(KEY_ZOOMRESET); break; 846 case 0x233: map_key_clear(KEY_SCROLLUP); break; 847 case 0x234: map_key_clear(KEY_SCROLLDOWN); break; 848 case 0x238: map_rel(REL_HWHEEL); break; 849 case 0x23d: map_key_clear(KEY_EDIT); break; 850 case 0x25f: map_key_clear(KEY_CANCEL); break; 851 case 0x269: map_key_clear(KEY_INSERT); break; 852 case 0x26a: map_key_clear(KEY_DELETE); break; 853 case 0x279: map_key_clear(KEY_REDO); break; 854 855 case 0x289: map_key_clear(KEY_REPLY); break; 856 case 0x28b: map_key_clear(KEY_FORWARDMAIL); break; 857 case 0x28c: map_key_clear(KEY_SEND); break; 858 859 default: goto ignore; 860 } 861 break; 862 863 case HID_UP_GENDEVCTRLS: 864 if (hidinput_setup_battery(device, HID_INPUT_REPORT, field)) 865 goto ignore; 866 else 867 goto unknown; 868 break; 869 870 case HID_UP_HPVENDOR: /* Reported on a Dutch layout HP5308 */ 871 set_bit(EV_REP, input->evbit); 872 switch (usage->hid & HID_USAGE) { 873 case 0x021: map_key_clear(KEY_PRINT); break; 874 case 0x070: map_key_clear(KEY_HP); break; 875 case 0x071: map_key_clear(KEY_CAMERA); break; 876 case 0x072: map_key_clear(KEY_SOUND); break; 877 case 0x073: map_key_clear(KEY_QUESTION); break; 878 case 0x080: map_key_clear(KEY_EMAIL); break; 879 case 0x081: map_key_clear(KEY_CHAT); break; 880 case 0x082: map_key_clear(KEY_SEARCH); break; 881 case 0x083: map_key_clear(KEY_CONNECT); break; 882 case 0x084: map_key_clear(KEY_FINANCE); break; 883 case 0x085: map_key_clear(KEY_SPORT); break; 884 case 0x086: map_key_clear(KEY_SHOP); break; 885 default: goto ignore; 886 } 887 break; 888 889 case HID_UP_HPVENDOR2: 890 set_bit(EV_REP, input->evbit); 891 switch (usage->hid & HID_USAGE) { 892 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN); break; 893 case 0x004: map_key_clear(KEY_BRIGHTNESSUP); break; 894 default: goto ignore; 895 } 896 break; 897 898 case HID_UP_MSVENDOR: 899 goto ignore; 900 901 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */ 902 set_bit(EV_REP, input->evbit); 903 goto ignore; 904 905 case HID_UP_LOGIVENDOR: 906 goto ignore; 907 908 case HID_UP_PID: 909 switch (usage->hid & HID_USAGE) { 910 case 0xa4: map_key_clear(BTN_DEAD); break; 911 default: goto ignore; 912 } 913 break; 914 915 default: 916 unknown: 917 if (field->report_size == 1) { 918 if (field->report->type == HID_OUTPUT_REPORT) { 919 map_led(LED_MISC); 920 break; 921 } 922 map_key(BTN_MISC); 923 break; 924 } 925 if (field->flags & HID_MAIN_ITEM_RELATIVE) { 926 map_rel(REL_MISC); 927 break; 928 } 929 map_abs(ABS_MISC); 930 break; 931 } 932 933 mapped: 934 if (device->driver->input_mapped && device->driver->input_mapped(device, 935 hidinput, field, usage, &bit, &max) < 0) 936 goto ignore; 937 938 set_bit(usage->type, input->evbit); 939 940 while (usage->code <= max && test_and_set_bit(usage->code, bit)) 941 usage->code = find_next_zero_bit(bit, max + 1, usage->code); 942 943 if (usage->code > max) 944 goto ignore; 945 946 947 if (usage->type == EV_ABS) { 948 949 int a = field->logical_minimum; 950 int b = field->logical_maximum; 951 952 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) { 953 a = field->logical_minimum = 0; 954 b = field->logical_maximum = 255; 955 } 956 957 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK) 958 input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4); 959 else input_set_abs_params(input, usage->code, a, b, 0, 0); 960 961 input_abs_set_res(input, usage->code, 962 hidinput_calc_abs_res(field, usage->code)); 963 964 /* use a larger default input buffer for MT devices */ 965 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0) 966 input_set_events_per_packet(input, 60); 967 } 968 969 if (usage->type == EV_ABS && 970 (usage->hat_min < usage->hat_max || usage->hat_dir)) { 971 int i; 972 for (i = usage->code; i < usage->code + 2 && i <= max; i++) { 973 input_set_abs_params(input, i, -1, 1, 0, 0); 974 set_bit(i, input->absbit); 975 } 976 if (usage->hat_dir && !field->dpad) 977 field->dpad = usage->code; 978 } 979 980 /* for those devices which produce Consumer volume usage as relative, 981 * we emulate pressing volumeup/volumedown appropriate number of times 982 * in hidinput_hid_event() 983 */ 984 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 985 (usage->code == ABS_VOLUME)) { 986 set_bit(KEY_VOLUMEUP, input->keybit); 987 set_bit(KEY_VOLUMEDOWN, input->keybit); 988 } 989 990 if (usage->type == EV_KEY) { 991 set_bit(EV_MSC, input->evbit); 992 set_bit(MSC_SCAN, input->mscbit); 993 } 994 995 ignore: 996 return; 997 998 } 999 1000 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value) 1001 { 1002 struct input_dev *input; 1003 unsigned *quirks = &hid->quirks; 1004 1005 if (!field->hidinput) 1006 return; 1007 1008 input = field->hidinput->input; 1009 1010 if (!usage->type) 1011 return; 1012 1013 if (usage->hat_min < usage->hat_max || usage->hat_dir) { 1014 int hat_dir = usage->hat_dir; 1015 if (!hat_dir) 1016 hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1; 1017 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0; 1018 input_event(input, usage->type, usage->code , hid_hat_to_axis[hat_dir].x); 1019 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y); 1020 return; 1021 } 1022 1023 if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */ 1024 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT); 1025 return; 1026 } 1027 1028 if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */ 1029 if (value) { 1030 input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1); 1031 return; 1032 } 1033 input_event(input, usage->type, usage->code, 0); 1034 input_event(input, usage->type, BTN_TOOL_RUBBER, 0); 1035 return; 1036 } 1037 1038 if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */ 1039 int a = field->logical_minimum; 1040 int b = field->logical_maximum; 1041 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3)); 1042 } 1043 1044 if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ 1045 dbg_hid("Maximum Effects - %d\n",value); 1046 return; 1047 } 1048 1049 if (usage->hid == (HID_UP_PID | 0x7fUL)) { 1050 dbg_hid("PID Pool Report\n"); 1051 return; 1052 } 1053 1054 if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */ 1055 return; 1056 1057 if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) && 1058 (usage->code == ABS_VOLUME)) { 1059 int count = abs(value); 1060 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN; 1061 int i; 1062 1063 for (i = 0; i < count; i++) { 1064 input_event(input, EV_KEY, direction, 1); 1065 input_sync(input); 1066 input_event(input, EV_KEY, direction, 0); 1067 input_sync(input); 1068 } 1069 return; 1070 } 1071 1072 /* 1073 * Ignore out-of-range values as per HID specification, 1074 * section 5.10 and 6.2.25. 1075 * 1076 * The logical_minimum < logical_maximum check is done so that we 1077 * don't unintentionally discard values sent by devices which 1078 * don't specify logical min and max. 1079 */ 1080 if ((field->flags & HID_MAIN_ITEM_VARIABLE) && 1081 (field->logical_minimum < field->logical_maximum) && 1082 (value < field->logical_minimum || 1083 value > field->logical_maximum)) { 1084 dbg_hid("Ignoring out-of-range value %x\n", value); 1085 return; 1086 } 1087 1088 /* report the usage code as scancode if the key status has changed */ 1089 if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value) 1090 input_event(input, EV_MSC, MSC_SCAN, usage->hid); 1091 1092 input_event(input, usage->type, usage->code, value); 1093 1094 if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY)) 1095 input_event(input, usage->type, usage->code, 0); 1096 } 1097 1098 void hidinput_report_event(struct hid_device *hid, struct hid_report *report) 1099 { 1100 struct hid_input *hidinput; 1101 1102 if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC) 1103 return; 1104 1105 list_for_each_entry(hidinput, &hid->inputs, list) 1106 input_sync(hidinput->input); 1107 } 1108 EXPORT_SYMBOL_GPL(hidinput_report_event); 1109 1110 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field) 1111 { 1112 struct hid_report *report; 1113 int i, j; 1114 1115 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) { 1116 for (i = 0; i < report->maxfield; i++) { 1117 *field = report->field[i]; 1118 for (j = 0; j < (*field)->maxusage; j++) 1119 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code) 1120 return j; 1121 } 1122 } 1123 return -1; 1124 } 1125 EXPORT_SYMBOL_GPL(hidinput_find_field); 1126 1127 struct hid_field *hidinput_get_led_field(struct hid_device *hid) 1128 { 1129 struct hid_report *report; 1130 struct hid_field *field; 1131 int i, j; 1132 1133 list_for_each_entry(report, 1134 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1135 list) { 1136 for (i = 0; i < report->maxfield; i++) { 1137 field = report->field[i]; 1138 for (j = 0; j < field->maxusage; j++) 1139 if (field->usage[j].type == EV_LED) 1140 return field; 1141 } 1142 } 1143 return NULL; 1144 } 1145 EXPORT_SYMBOL_GPL(hidinput_get_led_field); 1146 1147 unsigned int hidinput_count_leds(struct hid_device *hid) 1148 { 1149 struct hid_report *report; 1150 struct hid_field *field; 1151 int i, j; 1152 unsigned int count = 0; 1153 1154 list_for_each_entry(report, 1155 &hid->report_enum[HID_OUTPUT_REPORT].report_list, 1156 list) { 1157 for (i = 0; i < report->maxfield; i++) { 1158 field = report->field[i]; 1159 for (j = 0; j < field->maxusage; j++) 1160 if (field->usage[j].type == EV_LED && 1161 field->value[j]) 1162 count += 1; 1163 } 1164 } 1165 return count; 1166 } 1167 EXPORT_SYMBOL_GPL(hidinput_count_leds); 1168 1169 static void hidinput_led_worker(struct work_struct *work) 1170 { 1171 struct hid_device *hid = container_of(work, struct hid_device, 1172 led_work); 1173 struct hid_field *field; 1174 struct hid_report *report; 1175 int len, ret; 1176 __u8 *buf; 1177 1178 field = hidinput_get_led_field(hid); 1179 if (!field) 1180 return; 1181 1182 /* 1183 * field->report is accessed unlocked regarding HID core. So there might 1184 * be another incoming SET-LED request from user-space, which changes 1185 * the LED state while we assemble our outgoing buffer. However, this 1186 * doesn't matter as hid_output_report() correctly converts it into a 1187 * boolean value no matter what information is currently set on the LED 1188 * field (even garbage). So the remote device will always get a valid 1189 * request. 1190 * And in case we send a wrong value, a next led worker is spawned 1191 * for every SET-LED request so the following worker will send the 1192 * correct value, guaranteed! 1193 */ 1194 1195 report = field->report; 1196 1197 /* use custom SET_REPORT request if possible (asynchronous) */ 1198 if (hid->ll_driver->request) 1199 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT); 1200 1201 /* fall back to generic raw-output-report */ 1202 len = ((report->size - 1) >> 3) + 1 + (report->id > 0); 1203 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1204 if (!buf) 1205 return; 1206 1207 hid_output_report(report, buf); 1208 /* synchronous output report */ 1209 ret = hid_hw_output_report(hid, buf, len); 1210 if (ret == -ENOSYS) 1211 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT, 1212 HID_REQ_SET_REPORT); 1213 kfree(buf); 1214 } 1215 1216 static int hidinput_input_event(struct input_dev *dev, unsigned int type, 1217 unsigned int code, int value) 1218 { 1219 struct hid_device *hid = input_get_drvdata(dev); 1220 struct hid_field *field; 1221 int offset; 1222 1223 if (type == EV_FF) 1224 return input_ff_event(dev, type, code, value); 1225 1226 if (type != EV_LED) 1227 return -1; 1228 1229 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) { 1230 hid_warn(dev, "event field not found\n"); 1231 return -1; 1232 } 1233 1234 hid_set_field(field, offset, value); 1235 1236 schedule_work(&hid->led_work); 1237 return 0; 1238 } 1239 1240 static int hidinput_open(struct input_dev *dev) 1241 { 1242 struct hid_device *hid = input_get_drvdata(dev); 1243 1244 return hid_hw_open(hid); 1245 } 1246 1247 static void hidinput_close(struct input_dev *dev) 1248 { 1249 struct hid_device *hid = input_get_drvdata(dev); 1250 1251 hid_hw_close(hid); 1252 } 1253 1254 static void report_features(struct hid_device *hid) 1255 { 1256 struct hid_driver *drv = hid->driver; 1257 struct hid_report_enum *rep_enum; 1258 struct hid_report *rep; 1259 int i, j; 1260 1261 rep_enum = &hid->report_enum[HID_FEATURE_REPORT]; 1262 list_for_each_entry(rep, &rep_enum->report_list, list) 1263 for (i = 0; i < rep->maxfield; i++) { 1264 /* Ignore if report count is out of bounds. */ 1265 if (rep->field[i]->report_count < 1) 1266 continue; 1267 1268 for (j = 0; j < rep->field[i]->maxusage; j++) { 1269 /* Verify if Battery Strength feature is available */ 1270 hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]); 1271 1272 if (drv->feature_mapping) 1273 drv->feature_mapping(hid, rep->field[i], 1274 rep->field[i]->usage + j); 1275 } 1276 } 1277 } 1278 1279 static struct hid_input *hidinput_allocate(struct hid_device *hid) 1280 { 1281 struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL); 1282 struct input_dev *input_dev = input_allocate_device(); 1283 if (!hidinput || !input_dev) { 1284 kfree(hidinput); 1285 input_free_device(input_dev); 1286 hid_err(hid, "Out of memory during hid input probe\n"); 1287 return NULL; 1288 } 1289 1290 input_set_drvdata(input_dev, hid); 1291 input_dev->event = hidinput_input_event; 1292 input_dev->open = hidinput_open; 1293 input_dev->close = hidinput_close; 1294 input_dev->setkeycode = hidinput_setkeycode; 1295 input_dev->getkeycode = hidinput_getkeycode; 1296 1297 input_dev->name = hid->name; 1298 input_dev->phys = hid->phys; 1299 input_dev->uniq = hid->uniq; 1300 input_dev->id.bustype = hid->bus; 1301 input_dev->id.vendor = hid->vendor; 1302 input_dev->id.product = hid->product; 1303 input_dev->id.version = hid->version; 1304 input_dev->dev.parent = &hid->dev; 1305 hidinput->input = input_dev; 1306 list_add_tail(&hidinput->list, &hid->inputs); 1307 1308 return hidinput; 1309 } 1310 1311 static bool hidinput_has_been_populated(struct hid_input *hidinput) 1312 { 1313 int i; 1314 unsigned long r = 0; 1315 1316 for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++) 1317 r |= hidinput->input->evbit[i]; 1318 1319 for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++) 1320 r |= hidinput->input->keybit[i]; 1321 1322 for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++) 1323 r |= hidinput->input->relbit[i]; 1324 1325 for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++) 1326 r |= hidinput->input->absbit[i]; 1327 1328 for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++) 1329 r |= hidinput->input->mscbit[i]; 1330 1331 for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++) 1332 r |= hidinput->input->ledbit[i]; 1333 1334 for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++) 1335 r |= hidinput->input->sndbit[i]; 1336 1337 for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++) 1338 r |= hidinput->input->ffbit[i]; 1339 1340 for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++) 1341 r |= hidinput->input->swbit[i]; 1342 1343 return !!r; 1344 } 1345 1346 static void hidinput_cleanup_hidinput(struct hid_device *hid, 1347 struct hid_input *hidinput) 1348 { 1349 struct hid_report *report; 1350 int i, k; 1351 1352 list_del(&hidinput->list); 1353 input_free_device(hidinput->input); 1354 1355 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1356 if (k == HID_OUTPUT_REPORT && 1357 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1358 continue; 1359 1360 list_for_each_entry(report, &hid->report_enum[k].report_list, 1361 list) { 1362 1363 for (i = 0; i < report->maxfield; i++) 1364 if (report->field[i]->hidinput == hidinput) 1365 report->field[i]->hidinput = NULL; 1366 } 1367 } 1368 1369 kfree(hidinput); 1370 } 1371 1372 /* 1373 * Register the input device; print a message. 1374 * Configure the input layer interface 1375 * Read all reports and initialize the absolute field values. 1376 */ 1377 1378 int hidinput_connect(struct hid_device *hid, unsigned int force) 1379 { 1380 struct hid_driver *drv = hid->driver; 1381 struct hid_report *report; 1382 struct hid_input *hidinput = NULL; 1383 int i, j, k; 1384 1385 INIT_LIST_HEAD(&hid->inputs); 1386 INIT_WORK(&hid->led_work, hidinput_led_worker); 1387 1388 if (!force) { 1389 for (i = 0; i < hid->maxcollection; i++) { 1390 struct hid_collection *col = &hid->collection[i]; 1391 if (col->type == HID_COLLECTION_APPLICATION || 1392 col->type == HID_COLLECTION_PHYSICAL) 1393 if (IS_INPUT_APPLICATION(col->usage)) 1394 break; 1395 } 1396 1397 if (i == hid->maxcollection) 1398 return -1; 1399 } 1400 1401 report_features(hid); 1402 1403 for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) { 1404 if (k == HID_OUTPUT_REPORT && 1405 hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS) 1406 continue; 1407 1408 list_for_each_entry(report, &hid->report_enum[k].report_list, list) { 1409 1410 if (!report->maxfield) 1411 continue; 1412 1413 if (!hidinput) { 1414 hidinput = hidinput_allocate(hid); 1415 if (!hidinput) 1416 goto out_unwind; 1417 } 1418 1419 for (i = 0; i < report->maxfield; i++) 1420 for (j = 0; j < report->field[i]->maxusage; j++) 1421 hidinput_configure_usage(hidinput, report->field[i], 1422 report->field[i]->usage + j); 1423 1424 if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) && 1425 !hidinput_has_been_populated(hidinput)) 1426 continue; 1427 1428 if (hid->quirks & HID_QUIRK_MULTI_INPUT) { 1429 /* This will leave hidinput NULL, so that it 1430 * allocates another one if we have more inputs on 1431 * the same interface. Some devices (e.g. Happ's 1432 * UGCI) cram a lot of unrelated inputs into the 1433 * same interface. */ 1434 hidinput->report = report; 1435 if (drv->input_configured) 1436 drv->input_configured(hid, hidinput); 1437 if (input_register_device(hidinput->input)) 1438 goto out_cleanup; 1439 hidinput = NULL; 1440 } 1441 } 1442 } 1443 1444 if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) && 1445 !hidinput_has_been_populated(hidinput)) { 1446 /* no need to register an input device not populated */ 1447 hidinput_cleanup_hidinput(hid, hidinput); 1448 hidinput = NULL; 1449 } 1450 1451 if (list_empty(&hid->inputs)) { 1452 hid_err(hid, "No inputs registered, leaving\n"); 1453 goto out_unwind; 1454 } 1455 1456 if (hidinput) { 1457 if (drv->input_configured) 1458 drv->input_configured(hid, hidinput); 1459 if (input_register_device(hidinput->input)) 1460 goto out_cleanup; 1461 } 1462 1463 return 0; 1464 1465 out_cleanup: 1466 list_del(&hidinput->list); 1467 input_free_device(hidinput->input); 1468 kfree(hidinput); 1469 out_unwind: 1470 /* unwind the ones we already registered */ 1471 hidinput_disconnect(hid); 1472 1473 return -1; 1474 } 1475 EXPORT_SYMBOL_GPL(hidinput_connect); 1476 1477 void hidinput_disconnect(struct hid_device *hid) 1478 { 1479 struct hid_input *hidinput, *next; 1480 1481 hidinput_cleanup_battery(hid); 1482 1483 list_for_each_entry_safe(hidinput, next, &hid->inputs, list) { 1484 list_del(&hidinput->list); 1485 input_unregister_device(hidinput->input); 1486 kfree(hidinput); 1487 } 1488 1489 /* led_work is spawned by input_dev callbacks, but doesn't access the 1490 * parent input_dev at all. Once all input devices are removed, we 1491 * know that led_work will never get restarted, so we can cancel it 1492 * synchronously and are safe. */ 1493 cancel_work_sync(&hid->led_work); 1494 } 1495 EXPORT_SYMBOL_GPL(hidinput_disconnect); 1496 1497