linux/drivers/hid/hid-input.c
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   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
  27static 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
  46static const struct {
  47        __s32 x;
  48        __s32 y;
  49}  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  50
  51#define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  52#define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  53#define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  54#define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
  55
  56#define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  57                &max, EV_ABS, (c))
  58#define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
  59                &max, EV_KEY, (c))
  60
  61static bool match_scancode(struct hid_usage *usage,
  62                           unsigned int cur_idx, unsigned int scancode)
  63{
  64        return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
  65}
  66
  67static bool match_keycode(struct hid_usage *usage,
  68                          unsigned int cur_idx, unsigned int keycode)
  69{
  70        /*
  71         * We should exclude unmapped usages when doing lookup by keycode.
  72         */
  73        return (usage->type == EV_KEY && usage->code == keycode);
  74}
  75
  76static bool match_index(struct hid_usage *usage,
  77                        unsigned int cur_idx, unsigned int idx)
  78{
  79        return cur_idx == idx;
  80}
  81
  82typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
  83                                unsigned int cur_idx, unsigned int val);
  84
  85static struct hid_usage *hidinput_find_key(struct hid_device *hid,
  86                                           hid_usage_cmp_t match,
  87                                           unsigned int value,
  88                                           unsigned int *usage_idx)
  89{
  90        unsigned int i, j, k, cur_idx = 0;
  91        struct hid_report *report;
  92        struct hid_usage *usage;
  93
  94        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
  95                list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
  96                        for (i = 0; i < report->maxfield; i++) {
  97                                for (j = 0; j < report->field[i]->maxusage; j++) {
  98                                        usage = report->field[i]->usage + j;
  99                                        if (usage->type == EV_KEY || usage->type == 0) {
 100                                                if (match(usage, cur_idx, value)) {
 101                                                        if (usage_idx)
 102                                                                *usage_idx = cur_idx;
 103                                                        return usage;
 104                                                }
 105                                                cur_idx++;
 106                                        }
 107                                }
 108                        }
 109                }
 110        }
 111        return NULL;
 112}
 113
 114static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 115                                        const struct input_keymap_entry *ke,
 116                                        unsigned int *index)
 117{
 118        struct hid_usage *usage;
 119        unsigned int scancode;
 120
 121        if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 122                usage = hidinput_find_key(hid, match_index, ke->index, index);
 123        else if (input_scancode_to_scalar(ke, &scancode) == 0)
 124                usage = hidinput_find_key(hid, match_scancode, scancode, index);
 125        else
 126                usage = NULL;
 127
 128        return usage;
 129}
 130
 131static int hidinput_getkeycode(struct input_dev *dev,
 132                               struct input_keymap_entry *ke)
 133{
 134        struct hid_device *hid = input_get_drvdata(dev);
 135        struct hid_usage *usage;
 136        unsigned int scancode, index;
 137
 138        usage = hidinput_locate_usage(hid, ke, &index);
 139        if (usage) {
 140                ke->keycode = usage->type == EV_KEY ?
 141                                usage->code : KEY_RESERVED;
 142                ke->index = index;
 143                scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 144                ke->len = sizeof(scancode);
 145                memcpy(ke->scancode, &scancode, sizeof(scancode));
 146                return 0;
 147        }
 148
 149        return -EINVAL;
 150}
 151
 152static int hidinput_setkeycode(struct input_dev *dev,
 153                               const struct input_keymap_entry *ke,
 154                               unsigned int *old_keycode)
 155{
 156        struct hid_device *hid = input_get_drvdata(dev);
 157        struct hid_usage *usage;
 158
 159        usage = hidinput_locate_usage(hid, ke, NULL);
 160        if (usage) {
 161                *old_keycode = usage->type == EV_KEY ?
 162                                usage->code : KEY_RESERVED;
 163                usage->code = ke->keycode;
 164
 165                clear_bit(*old_keycode, dev->keybit);
 166                set_bit(usage->code, dev->keybit);
 167                dbg_hid("Assigned keycode %d to HID usage code %x\n",
 168                        usage->code, usage->hid);
 169
 170                /*
 171                 * Set the keybit for the old keycode if the old keycode is used
 172                 * by another key
 173                 */
 174                if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 175                        set_bit(*old_keycode, dev->keybit);
 176
 177                return 0;
 178        }
 179
 180        return -EINVAL;
 181}
 182
 183
 184/**
 185 * hidinput_calc_abs_res - calculate an absolute axis resolution
 186 * @field: the HID report field to calculate resolution for
 187 * @code: axis code
 188 *
 189 * The formula is:
 190 *                         (logical_maximum - logical_minimum)
 191 * resolution = ----------------------------------------------------------
 192 *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 193 *
 194 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 195 *
 196 * Only exponent 1 length units are processed. Centimeters and inches are
 197 * converted to millimeters. Degrees are converted to radians.
 198 */
 199__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 200{
 201        __s32 unit_exponent = field->unit_exponent;
 202        __s32 logical_extents = field->logical_maximum -
 203                                        field->logical_minimum;
 204        __s32 physical_extents = field->physical_maximum -
 205                                        field->physical_minimum;
 206        __s32 prev;
 207
 208        /* Check if the extents are sane */
 209        if (logical_extents <= 0 || physical_extents <= 0)
 210                return 0;
 211
 212        /*
 213         * Verify and convert units.
 214         * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 215         */
 216        switch (code) {
 217        case ABS_X:
 218        case ABS_Y:
 219        case ABS_Z:
 220        case ABS_MT_POSITION_X:
 221        case ABS_MT_POSITION_Y:
 222        case ABS_MT_TOOL_X:
 223        case ABS_MT_TOOL_Y:
 224        case ABS_MT_TOUCH_MAJOR:
 225        case ABS_MT_TOUCH_MINOR:
 226                if (field->unit == 0x11) {              /* If centimeters */
 227                        /* Convert to millimeters */
 228                        unit_exponent += 1;
 229                } else if (field->unit == 0x13) {       /* If inches */
 230                        /* Convert to millimeters */
 231                        prev = physical_extents;
 232                        physical_extents *= 254;
 233                        if (physical_extents < prev)
 234                                return 0;
 235                        unit_exponent -= 1;
 236                } else {
 237                        return 0;
 238                }
 239                break;
 240
 241        case ABS_RX:
 242        case ABS_RY:
 243        case ABS_RZ:
 244        case ABS_WHEEL:
 245        case ABS_TILT_X:
 246        case ABS_TILT_Y:
 247                if (field->unit == 0x14) {              /* If degrees */
 248                        /* Convert to radians */
 249                        prev = logical_extents;
 250                        logical_extents *= 573;
 251                        if (logical_extents < prev)
 252                                return 0;
 253                        unit_exponent += 1;
 254                } else if (field->unit != 0x12) {       /* If not radians */
 255                        return 0;
 256                }
 257                break;
 258
 259        default:
 260                return 0;
 261        }
 262
 263        /* Apply negative unit exponent */
 264        for (; unit_exponent < 0; unit_exponent++) {
 265                prev = logical_extents;
 266                logical_extents *= 10;
 267                if (logical_extents < prev)
 268                        return 0;
 269        }
 270        /* Apply positive unit exponent */
 271        for (; unit_exponent > 0; unit_exponent--) {
 272                prev = physical_extents;
 273                physical_extents *= 10;
 274                if (physical_extents < prev)
 275                        return 0;
 276        }
 277
 278        /* Calculate resolution */
 279        return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 280}
 281EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 282
 283#ifdef CONFIG_HID_BATTERY_STRENGTH
 284static enum power_supply_property hidinput_battery_props[] = {
 285        POWER_SUPPLY_PROP_PRESENT,
 286        POWER_SUPPLY_PROP_ONLINE,
 287        POWER_SUPPLY_PROP_CAPACITY,
 288        POWER_SUPPLY_PROP_MODEL_NAME,
 289        POWER_SUPPLY_PROP_STATUS,
 290        POWER_SUPPLY_PROP_SCOPE,
 291};
 292
 293#define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 294#define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 295#define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 296
 297static const struct hid_device_id hid_battery_quirks[] = {
 298        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 299                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 300          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 301        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 302                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 303          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 304        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 305                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 306          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 307        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 308                               USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 309          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 310        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 311                USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 312          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 313        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 314                USB_DEVICE_ID_ELECOM_BM084),
 315          HID_BATTERY_QUIRK_IGNORE },
 316        { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 317                USB_DEVICE_ID_SYMBOL_SCANNER_3),
 318          HID_BATTERY_QUIRK_IGNORE },
 319        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 320                USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 321          HID_BATTERY_QUIRK_IGNORE },
 322        {}
 323};
 324
 325static unsigned find_battery_quirk(struct hid_device *hdev)
 326{
 327        unsigned quirks = 0;
 328        const struct hid_device_id *match;
 329
 330        match = hid_match_id(hdev, hid_battery_quirks);
 331        if (match != NULL)
 332                quirks = match->driver_data;
 333
 334        return quirks;
 335}
 336
 337static int hidinput_scale_battery_capacity(struct hid_device *dev,
 338                                           int value)
 339{
 340        if (dev->battery_min < dev->battery_max &&
 341            value >= dev->battery_min && value <= dev->battery_max)
 342                value = ((value - dev->battery_min) * 100) /
 343                        (dev->battery_max - dev->battery_min);
 344
 345        return value;
 346}
 347
 348static int hidinput_query_battery_capacity(struct hid_device *dev)
 349{
 350        u8 *buf;
 351        int ret;
 352
 353        buf = kmalloc(2, GFP_KERNEL);
 354        if (!buf)
 355                return -ENOMEM;
 356
 357        ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 358                                 dev->battery_report_type, HID_REQ_GET_REPORT);
 359        if (ret != 2) {
 360                kfree(buf);
 361                return -ENODATA;
 362        }
 363
 364        ret = hidinput_scale_battery_capacity(dev, buf[1]);
 365        kfree(buf);
 366        return ret;
 367}
 368
 369static int hidinput_get_battery_property(struct power_supply *psy,
 370                                         enum power_supply_property prop,
 371                                         union power_supply_propval *val)
 372{
 373        struct hid_device *dev = power_supply_get_drvdata(psy);
 374        int value;
 375        int ret = 0;
 376
 377        switch (prop) {
 378        case POWER_SUPPLY_PROP_PRESENT:
 379        case POWER_SUPPLY_PROP_ONLINE:
 380                val->intval = 1;
 381                break;
 382
 383        case POWER_SUPPLY_PROP_CAPACITY:
 384                if (dev->battery_status != HID_BATTERY_REPORTED &&
 385                    !dev->battery_avoid_query) {
 386                        value = hidinput_query_battery_capacity(dev);
 387                        if (value < 0)
 388                                return value;
 389                } else  {
 390                        value = dev->battery_capacity;
 391                }
 392
 393                val->intval = value;
 394                break;
 395
 396        case POWER_SUPPLY_PROP_MODEL_NAME:
 397                val->strval = dev->name;
 398                break;
 399
 400        case POWER_SUPPLY_PROP_STATUS:
 401                if (dev->battery_status != HID_BATTERY_REPORTED &&
 402                    !dev->battery_avoid_query) {
 403                        value = hidinput_query_battery_capacity(dev);
 404                        if (value < 0)
 405                                return value;
 406
 407                        dev->battery_capacity = value;
 408                        dev->battery_status = HID_BATTERY_QUERIED;
 409                }
 410
 411                if (dev->battery_status == HID_BATTERY_UNKNOWN)
 412                        val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 413                else if (dev->battery_capacity == 100)
 414                        val->intval = POWER_SUPPLY_STATUS_FULL;
 415                else
 416                        val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 417                break;
 418
 419        case POWER_SUPPLY_PROP_SCOPE:
 420                val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 421                break;
 422
 423        default:
 424                ret = -EINVAL;
 425                break;
 426        }
 427
 428        return ret;
 429}
 430
 431static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 432{
 433        struct power_supply_desc *psy_desc;
 434        struct power_supply_config psy_cfg = { .drv_data = dev, };
 435        unsigned quirks;
 436        s32 min, max;
 437        int error;
 438
 439        if (dev->battery)
 440                return 0;       /* already initialized? */
 441
 442        quirks = find_battery_quirk(dev);
 443
 444        hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 445                dev->bus, dev->vendor, dev->product, dev->version, quirks);
 446
 447        if (quirks & HID_BATTERY_QUIRK_IGNORE)
 448                return 0;
 449
 450        psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 451        if (!psy_desc)
 452                return -ENOMEM;
 453
 454        psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 455                                   strlen(dev->uniq) ?
 456                                        dev->uniq : dev_name(&dev->dev));
 457        if (!psy_desc->name) {
 458                error = -ENOMEM;
 459                goto err_free_mem;
 460        }
 461
 462        psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 463        psy_desc->properties = hidinput_battery_props;
 464        psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 465        psy_desc->use_for_apm = 0;
 466        psy_desc->get_property = hidinput_get_battery_property;
 467
 468        min = field->logical_minimum;
 469        max = field->logical_maximum;
 470
 471        if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 472                min = 0;
 473                max = 100;
 474        }
 475
 476        if (quirks & HID_BATTERY_QUIRK_FEATURE)
 477                report_type = HID_FEATURE_REPORT;
 478
 479        dev->battery_min = min;
 480        dev->battery_max = max;
 481        dev->battery_report_type = report_type;
 482        dev->battery_report_id = field->report->id;
 483
 484        /*
 485         * Stylus is normally not connected to the device and thus we
 486         * can't query the device and get meaningful battery strength.
 487         * We have to wait for the device to report it on its own.
 488         */
 489        dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 490                                   field->physical == HID_DG_STYLUS;
 491
 492        dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 493        if (IS_ERR(dev->battery)) {
 494                error = PTR_ERR(dev->battery);
 495                hid_warn(dev, "can't register power supply: %d\n", error);
 496                goto err_free_name;
 497        }
 498
 499        power_supply_powers(dev->battery, &dev->dev);
 500        return 0;
 501
 502err_free_name:
 503        kfree(psy_desc->name);
 504err_free_mem:
 505        kfree(psy_desc);
 506        dev->battery = NULL;
 507        return error;
 508}
 509
 510static void hidinput_cleanup_battery(struct hid_device *dev)
 511{
 512        const struct power_supply_desc *psy_desc;
 513
 514        if (!dev->battery)
 515                return;
 516
 517        psy_desc = dev->battery->desc;
 518        power_supply_unregister(dev->battery);
 519        kfree(psy_desc->name);
 520        kfree(psy_desc);
 521        dev->battery = NULL;
 522}
 523
 524static void hidinput_update_battery(struct hid_device *dev, int value)
 525{
 526        int capacity;
 527
 528        if (!dev->battery)
 529                return;
 530
 531        if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 532                return;
 533
 534        capacity = hidinput_scale_battery_capacity(dev, value);
 535
 536        if (dev->battery_status != HID_BATTERY_REPORTED ||
 537            capacity != dev->battery_capacity) {
 538                dev->battery_capacity = capacity;
 539                dev->battery_status = HID_BATTERY_REPORTED;
 540                power_supply_changed(dev->battery);
 541        }
 542}
 543#else  /* !CONFIG_HID_BATTERY_STRENGTH */
 544static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 545                                  struct hid_field *field)
 546{
 547        return 0;
 548}
 549
 550static void hidinput_cleanup_battery(struct hid_device *dev)
 551{
 552}
 553
 554static void hidinput_update_battery(struct hid_device *dev, int value)
 555{
 556}
 557#endif  /* CONFIG_HID_BATTERY_STRENGTH */
 558
 559static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 560                                     struct hid_usage *usage)
 561{
 562        struct input_dev *input = hidinput->input;
 563        struct hid_device *device = input_get_drvdata(input);
 564        int max = 0, code;
 565        unsigned long *bit = NULL;
 566
 567        field->hidinput = hidinput;
 568
 569        if (field->flags & HID_MAIN_ITEM_CONSTANT)
 570                goto ignore;
 571
 572        /* Ignore if report count is out of bounds. */
 573        if (field->report_count < 1)
 574                goto ignore;
 575
 576        /* only LED usages are supported in output fields */
 577        if (field->report_type == HID_OUTPUT_REPORT &&
 578                        (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 579                goto ignore;
 580        }
 581
 582        if (device->driver->input_mapping) {
 583                int ret = device->driver->input_mapping(device, hidinput, field,
 584                                usage, &bit, &max);
 585                if (ret > 0)
 586                        goto mapped;
 587                if (ret < 0)
 588                        goto ignore;
 589        }
 590
 591        switch (usage->hid & HID_USAGE_PAGE) {
 592        case HID_UP_UNDEFINED:
 593                goto ignore;
 594
 595        case HID_UP_KEYBOARD:
 596                set_bit(EV_REP, input->evbit);
 597
 598                if ((usage->hid & HID_USAGE) < 256) {
 599                        if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 600                        map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 601                } else
 602                        map_key(KEY_UNKNOWN);
 603
 604                break;
 605
 606        case HID_UP_BUTTON:
 607                code = ((usage->hid - 1) & HID_USAGE);
 608
 609                switch (field->application) {
 610                case HID_GD_MOUSE:
 611                case HID_GD_POINTER:  code += BTN_MOUSE; break;
 612                case HID_GD_JOYSTICK:
 613                                if (code <= 0xf)
 614                                        code += BTN_JOYSTICK;
 615                                else
 616                                        code += BTN_TRIGGER_HAPPY - 0x10;
 617                                break;
 618                case HID_GD_GAMEPAD:
 619                                if (code <= 0xf)
 620                                        code += BTN_GAMEPAD;
 621                                else
 622                                        code += BTN_TRIGGER_HAPPY - 0x10;
 623                                break;
 624                default:
 625                        switch (field->physical) {
 626                        case HID_GD_MOUSE:
 627                        case HID_GD_POINTER:  code += BTN_MOUSE; break;
 628                        case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 629                        case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 630                        default:              code += BTN_MISC;
 631                        }
 632                }
 633
 634                map_key(code);
 635                break;
 636
 637        case HID_UP_SIMULATION:
 638                switch (usage->hid & 0xffff) {
 639                case 0xba: map_abs(ABS_RUDDER);   break;
 640                case 0xbb: map_abs(ABS_THROTTLE); break;
 641                case 0xc4: map_abs(ABS_GAS);      break;
 642                case 0xc5: map_abs(ABS_BRAKE);    break;
 643                case 0xc8: map_abs(ABS_WHEEL);    break;
 644                default:   goto ignore;
 645                }
 646                break;
 647
 648        case HID_UP_GENDESK:
 649                if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 650                        switch (usage->hid & 0xf) {
 651                        case 0x1: map_key_clear(KEY_POWER);  break;
 652                        case 0x2: map_key_clear(KEY_SLEEP);  break;
 653                        case 0x3: map_key_clear(KEY_WAKEUP); break;
 654                        case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 655                        case 0x5: map_key_clear(KEY_MENU); break;
 656                        case 0x6: map_key_clear(KEY_PROG1); break;
 657                        case 0x7: map_key_clear(KEY_HELP); break;
 658                        case 0x8: map_key_clear(KEY_EXIT); break;
 659                        case 0x9: map_key_clear(KEY_SELECT); break;
 660                        case 0xa: map_key_clear(KEY_RIGHT); break;
 661                        case 0xb: map_key_clear(KEY_LEFT); break;
 662                        case 0xc: map_key_clear(KEY_UP); break;
 663                        case 0xd: map_key_clear(KEY_DOWN); break;
 664                        case 0xe: map_key_clear(KEY_POWER2); break;
 665                        case 0xf: map_key_clear(KEY_RESTART); break;
 666                        default: goto unknown;
 667                        }
 668                        break;
 669                }
 670
 671                if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 672                        switch (usage->hid & 0xf) {
 673                        case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 674                        default: goto ignore;
 675                        }
 676                        break;
 677                }
 678
 679                /*
 680                 * Some lazy vendors declare 255 usages for System Control,
 681                 * leading to the creation of ABS_X|Y axis and too many others.
 682                 * It wouldn't be a problem if joydev doesn't consider the
 683                 * device as a joystick then.
 684                 */
 685                if (field->application == HID_GD_SYSTEM_CONTROL)
 686                        goto ignore;
 687
 688                if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 689                        switch (usage->hid) {
 690                        case HID_GD_UP:    usage->hat_dir = 1; break;
 691                        case HID_GD_DOWN:  usage->hat_dir = 5; break;
 692                        case HID_GD_RIGHT: usage->hat_dir = 3; break;
 693                        case HID_GD_LEFT:  usage->hat_dir = 7; break;
 694                        default: goto unknown;
 695                        }
 696                        if (field->dpad) {
 697                                map_abs(field->dpad);
 698                                goto ignore;
 699                        }
 700                        map_abs(ABS_HAT0X);
 701                        break;
 702                }
 703
 704                switch (usage->hid) {
 705                /* These usage IDs map directly to the usage codes. */
 706                case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 707                case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 708                        if (field->flags & HID_MAIN_ITEM_RELATIVE)
 709                                map_rel(usage->hid & 0xf);
 710                        else
 711                                map_abs_clear(usage->hid & 0xf);
 712                        break;
 713
 714                case HID_GD_WHEEL:
 715                        if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 716                                set_bit(REL_WHEEL, input->relbit);
 717                                map_rel(REL_WHEEL_HI_RES);
 718                        } else {
 719                                map_abs(usage->hid & 0xf);
 720                        }
 721                        break;
 722                case HID_GD_SLIDER: case HID_GD_DIAL:
 723                        if (field->flags & HID_MAIN_ITEM_RELATIVE)
 724                                map_rel(usage->hid & 0xf);
 725                        else
 726                                map_abs(usage->hid & 0xf);
 727                        break;
 728
 729                case HID_GD_HATSWITCH:
 730                        usage->hat_min = field->logical_minimum;
 731                        usage->hat_max = field->logical_maximum;
 732                        map_abs(ABS_HAT0X);
 733                        break;
 734
 735                case HID_GD_START:      map_key_clear(BTN_START);       break;
 736                case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 737
 738                case HID_GD_RFKILL_BTN:
 739                        /* MS wireless radio ctl extension, also check CA */
 740                        if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 741                                map_key_clear(KEY_RFKILL);
 742                                /* We need to simulate the btn release */
 743                                field->flags |= HID_MAIN_ITEM_RELATIVE;
 744                                break;
 745                        }
 746
 747                default: goto unknown;
 748                }
 749
 750                break;
 751
 752        case HID_UP_LED:
 753                switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 754                case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 755                case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 756                case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 757                case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 758                case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 759                case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 760                case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 761                case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 762                case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 763                case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 764                case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 765
 766                default: goto ignore;
 767                }
 768                break;
 769
 770        case HID_UP_DIGITIZER:
 771                if ((field->application & 0xff) == 0x01) /* Digitizer */
 772                        __set_bit(INPUT_PROP_POINTER, input->propbit);
 773                else if ((field->application & 0xff) == 0x02) /* Pen */
 774                        __set_bit(INPUT_PROP_DIRECT, input->propbit);
 775
 776                switch (usage->hid & 0xff) {
 777                case 0x00: /* Undefined */
 778                        goto ignore;
 779
 780                case 0x30: /* TipPressure */
 781                        if (!test_bit(BTN_TOUCH, input->keybit)) {
 782                                device->quirks |= HID_QUIRK_NOTOUCH;
 783                                set_bit(EV_KEY, input->evbit);
 784                                set_bit(BTN_TOUCH, input->keybit);
 785                        }
 786                        map_abs_clear(ABS_PRESSURE);
 787                        break;
 788
 789                case 0x32: /* InRange */
 790                        switch (field->physical & 0xff) {
 791                        case 0x21: map_key(BTN_TOOL_MOUSE); break;
 792                        case 0x22: map_key(BTN_TOOL_FINGER); break;
 793                        default: map_key(BTN_TOOL_PEN); break;
 794                        }
 795                        break;
 796
 797                case 0x3b: /* Battery Strength */
 798                        hidinput_setup_battery(device, HID_INPUT_REPORT, field);
 799                        usage->type = EV_PWR;
 800                        goto ignore;
 801
 802                case 0x3c: /* Invert */
 803                        map_key_clear(BTN_TOOL_RUBBER);
 804                        break;
 805
 806                case 0x3d: /* X Tilt */
 807                        map_abs_clear(ABS_TILT_X);
 808                        break;
 809
 810                case 0x3e: /* Y Tilt */
 811                        map_abs_clear(ABS_TILT_Y);
 812                        break;
 813
 814                case 0x33: /* Touch */
 815                case 0x42: /* TipSwitch */
 816                case 0x43: /* TipSwitch2 */
 817                        device->quirks &= ~HID_QUIRK_NOTOUCH;
 818                        map_key_clear(BTN_TOUCH);
 819                        break;
 820
 821                case 0x44: /* BarrelSwitch */
 822                        map_key_clear(BTN_STYLUS);
 823                        break;
 824
 825                case 0x45: /* ERASER */
 826                        /*
 827                         * This event is reported when eraser tip touches the surface.
 828                         * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
 829                         * tool gets in proximity.
 830                         */
 831                        map_key_clear(BTN_TOUCH);
 832                        break;
 833
 834                case 0x46: /* TabletPick */
 835                case 0x5a: /* SecondaryBarrelSwitch */
 836                        map_key_clear(BTN_STYLUS2);
 837                        break;
 838
 839                case 0x5b: /* TransducerSerialNumber */
 840                        usage->type = EV_MSC;
 841                        usage->code = MSC_SERIAL;
 842                        bit = input->mscbit;
 843                        max = MSC_MAX;
 844                        break;
 845
 846                default:  goto unknown;
 847                }
 848                break;
 849
 850        case HID_UP_TELEPHONY:
 851                switch (usage->hid & HID_USAGE) {
 852                case 0x2f: map_key_clear(KEY_MICMUTE);          break;
 853                case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
 854                case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
 855                case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
 856                case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
 857                case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
 858                case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
 859                case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
 860                case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
 861                case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
 862                case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
 863                case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
 864                case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
 865                case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
 866                case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
 867                case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
 868                case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
 869                default: goto ignore;
 870                }
 871                break;
 872
 873        case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 874                switch (usage->hid & HID_USAGE) {
 875                case 0x000: goto ignore;
 876                case 0x030: map_key_clear(KEY_POWER);           break;
 877                case 0x031: map_key_clear(KEY_RESTART);         break;
 878                case 0x032: map_key_clear(KEY_SLEEP);           break;
 879                case 0x034: map_key_clear(KEY_SLEEP);           break;
 880                case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 881                case 0x036: map_key_clear(BTN_MISC);            break;
 882
 883                case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 884                case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 885                case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 886                case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 887                case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 888                case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 889                case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 890                case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 891                case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 892
 893                case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 894                case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 895                case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 896                case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 897                case 0x069: map_key_clear(KEY_RED);             break;
 898                case 0x06a: map_key_clear(KEY_GREEN);           break;
 899                case 0x06b: map_key_clear(KEY_BLUE);            break;
 900                case 0x06c: map_key_clear(KEY_YELLOW);          break;
 901                case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
 902
 903                case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 904                case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 905                case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 906                case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 907                case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 908                case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 909
 910                case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
 911                case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
 912                case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 913
 914                case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 915                case 0x083: map_key_clear(KEY_LAST);            break;
 916                case 0x084: map_key_clear(KEY_ENTER);           break;
 917                case 0x088: map_key_clear(KEY_PC);              break;
 918                case 0x089: map_key_clear(KEY_TV);              break;
 919                case 0x08a: map_key_clear(KEY_WWW);             break;
 920                case 0x08b: map_key_clear(KEY_DVD);             break;
 921                case 0x08c: map_key_clear(KEY_PHONE);           break;
 922                case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 923                case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 924                case 0x08f: map_key_clear(KEY_GAMES);           break;
 925                case 0x090: map_key_clear(KEY_MEMO);            break;
 926                case 0x091: map_key_clear(KEY_CD);              break;
 927                case 0x092: map_key_clear(KEY_VCR);             break;
 928                case 0x093: map_key_clear(KEY_TUNER);           break;
 929                case 0x094: map_key_clear(KEY_EXIT);            break;
 930                case 0x095: map_key_clear(KEY_HELP);            break;
 931                case 0x096: map_key_clear(KEY_TAPE);            break;
 932                case 0x097: map_key_clear(KEY_TV2);             break;
 933                case 0x098: map_key_clear(KEY_SAT);             break;
 934                case 0x09a: map_key_clear(KEY_PVR);             break;
 935
 936                case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 937                case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 938                case 0x0a0: map_key_clear(KEY_VCR2);            break;
 939
 940                case 0x0b0: map_key_clear(KEY_PLAY);            break;
 941                case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 942                case 0x0b2: map_key_clear(KEY_RECORD);          break;
 943                case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 944                case 0x0b4: map_key_clear(KEY_REWIND);          break;
 945                case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 946                case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 947                case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 948                case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 949                case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 950                case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 951                case 0x0bf: map_key_clear(KEY_SLOW);            break;
 952
 953                case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 954                case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 955                case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 956                case 0x0e2: map_key_clear(KEY_MUTE);            break;
 957                case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 958                case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 959                case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 960                case 0x0f5: map_key_clear(KEY_SLOW);            break;
 961
 962                case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 963                case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 964                case 0x183: map_key_clear(KEY_CONFIG);          break;
 965                case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 966                case 0x185: map_key_clear(KEY_EDITOR);          break;
 967                case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 968                case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 969                case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 970                case 0x189: map_key_clear(KEY_DATABASE);        break;
 971                case 0x18a: map_key_clear(KEY_MAIL);            break;
 972                case 0x18b: map_key_clear(KEY_NEWS);            break;
 973                case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 974                case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 975                case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 976                case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 977                case 0x190: map_key_clear(KEY_JOURNAL);         break;
 978                case 0x191: map_key_clear(KEY_FINANCE);         break;
 979                case 0x192: map_key_clear(KEY_CALC);            break;
 980                case 0x193: map_key_clear(KEY_PLAYER);          break;
 981                case 0x194: map_key_clear(KEY_FILE);            break;
 982                case 0x196: map_key_clear(KEY_WWW);             break;
 983                case 0x199: map_key_clear(KEY_CHAT);            break;
 984                case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 985                case 0x19e: map_key_clear(KEY_COFFEE);          break;
 986                case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 987                case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 988                case 0x1a3: map_key_clear(KEY_NEXT);            break;
 989                case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 990                case 0x1a6: map_key_clear(KEY_HELP);            break;
 991                case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 992                case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 993                case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 994                case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 995                case 0x1b4: map_key_clear(KEY_FILE);            break;
 996                case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 997                case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 998                case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 999                case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1000                case 0x1bd: map_key_clear(KEY_INFO);            break;
1001                case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1002                case 0x201: map_key_clear(KEY_NEW);             break;
1003                case 0x202: map_key_clear(KEY_OPEN);            break;
1004                case 0x203: map_key_clear(KEY_CLOSE);           break;
1005                case 0x204: map_key_clear(KEY_EXIT);            break;
1006                case 0x207: map_key_clear(KEY_SAVE);            break;
1007                case 0x208: map_key_clear(KEY_PRINT);           break;
1008                case 0x209: map_key_clear(KEY_PROPS);           break;
1009                case 0x21a: map_key_clear(KEY_UNDO);            break;
1010                case 0x21b: map_key_clear(KEY_COPY);            break;
1011                case 0x21c: map_key_clear(KEY_CUT);             break;
1012                case 0x21d: map_key_clear(KEY_PASTE);           break;
1013                case 0x21f: map_key_clear(KEY_FIND);            break;
1014                case 0x221: map_key_clear(KEY_SEARCH);          break;
1015                case 0x222: map_key_clear(KEY_GOTO);            break;
1016                case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1017                case 0x224: map_key_clear(KEY_BACK);            break;
1018                case 0x225: map_key_clear(KEY_FORWARD);         break;
1019                case 0x226: map_key_clear(KEY_STOP);            break;
1020                case 0x227: map_key_clear(KEY_REFRESH);         break;
1021                case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1022                case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1023                case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1024                case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1025                case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1026                case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1027                case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1028                case 0x238: /* AC Pan */
1029                        set_bit(REL_HWHEEL, input->relbit);
1030                        map_rel(REL_HWHEEL_HI_RES);
1031                        break;
1032                case 0x23d: map_key_clear(KEY_EDIT);            break;
1033                case 0x25f: map_key_clear(KEY_CANCEL);          break;
1034                case 0x269: map_key_clear(KEY_INSERT);          break;
1035                case 0x26a: map_key_clear(KEY_DELETE);          break;
1036                case 0x279: map_key_clear(KEY_REDO);            break;
1037
1038                case 0x289: map_key_clear(KEY_REPLY);           break;
1039                case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1040                case 0x28c: map_key_clear(KEY_SEND);            break;
1041
1042                case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1043
1044                case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1045                case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1046                case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1047                case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1048                case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1049                case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1050
1051                case 0x29f: map_key_clear(KEY_SCALE);           break;
1052
1053                default: map_key_clear(KEY_UNKNOWN);
1054                }
1055                break;
1056
1057        case HID_UP_GENDEVCTRLS:
1058                switch (usage->hid) {
1059                case HID_DC_BATTERYSTRENGTH:
1060                        hidinput_setup_battery(device, HID_INPUT_REPORT, field);
1061                        usage->type = EV_PWR;
1062                        goto ignore;
1063                }
1064                goto unknown;
1065
1066        case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1067                set_bit(EV_REP, input->evbit);
1068                switch (usage->hid & HID_USAGE) {
1069                case 0x021: map_key_clear(KEY_PRINT);           break;
1070                case 0x070: map_key_clear(KEY_HP);              break;
1071                case 0x071: map_key_clear(KEY_CAMERA);          break;
1072                case 0x072: map_key_clear(KEY_SOUND);           break;
1073                case 0x073: map_key_clear(KEY_QUESTION);        break;
1074                case 0x080: map_key_clear(KEY_EMAIL);           break;
1075                case 0x081: map_key_clear(KEY_CHAT);            break;
1076                case 0x082: map_key_clear(KEY_SEARCH);          break;
1077                case 0x083: map_key_clear(KEY_CONNECT);         break;
1078                case 0x084: map_key_clear(KEY_FINANCE);         break;
1079                case 0x085: map_key_clear(KEY_SPORT);           break;
1080                case 0x086: map_key_clear(KEY_SHOP);            break;
1081                default:    goto ignore;
1082                }
1083                break;
1084
1085        case HID_UP_HPVENDOR2:
1086                set_bit(EV_REP, input->evbit);
1087                switch (usage->hid & HID_USAGE) {
1088                case 0x001: map_key_clear(KEY_MICMUTE);         break;
1089                case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1090                case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1091                default:    goto ignore;
1092                }
1093                break;
1094
1095        case HID_UP_MSVENDOR:
1096                goto ignore;
1097
1098        case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1099                set_bit(EV_REP, input->evbit);
1100                goto ignore;
1101
1102        case HID_UP_LOGIVENDOR:
1103                /* intentional fallback */
1104        case HID_UP_LOGIVENDOR2:
1105                /* intentional fallback */
1106        case HID_UP_LOGIVENDOR3:
1107                goto ignore;
1108
1109        case HID_UP_PID:
1110                switch (usage->hid & HID_USAGE) {
1111                case 0xa4: map_key_clear(BTN_DEAD);     break;
1112                default: goto ignore;
1113                }
1114                break;
1115
1116        default:
1117        unknown:
1118                if (field->report_size == 1) {
1119                        if (field->report->type == HID_OUTPUT_REPORT) {
1120                                map_led(LED_MISC);
1121                                break;
1122                        }
1123                        map_key(BTN_MISC);
1124                        break;
1125                }
1126                if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1127                        map_rel(REL_MISC);
1128                        break;
1129                }
1130                map_abs(ABS_MISC);
1131                break;
1132        }
1133
1134mapped:
1135        if (device->driver->input_mapped &&
1136            device->driver->input_mapped(device, hidinput, field, usage,
1137                                         &bit, &max) < 0) {
1138                /*
1139                 * The driver indicated that no further generic handling
1140                 * of the usage is desired.
1141                 */
1142                return;
1143        }
1144
1145        set_bit(usage->type, input->evbit);
1146
1147        /*
1148         * This part is *really* controversial:
1149         * - HID aims at being generic so we should do our best to export
1150         *   all incoming events
1151         * - HID describes what events are, so there is no reason for ABS_X
1152         *   to be mapped to ABS_Y
1153         * - HID is using *_MISC+N as a default value, but nothing prevents
1154         *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1155         *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1156         *   processing)
1157         *
1158         * If devices still want to use this (at their own risk), they will
1159         * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1160         * the default should be a reliable mapping.
1161         */
1162        while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1163                if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1164                        usage->code = find_next_zero_bit(bit,
1165                                                         max + 1,
1166                                                         usage->code);
1167                } else {
1168                        device->status |= HID_STAT_DUP_DETECTED;
1169                        goto ignore;
1170                }
1171        }
1172
1173        if (usage->code > max)
1174                goto ignore;
1175
1176        if (usage->type == EV_ABS) {
1177
1178                int a = field->logical_minimum;
1179                int b = field->logical_maximum;
1180
1181                if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1182                        a = field->logical_minimum = 0;
1183                        b = field->logical_maximum = 255;
1184                }
1185
1186                if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1187                        input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1188                else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1189
1190                input_abs_set_res(input, usage->code,
1191                                  hidinput_calc_abs_res(field, usage->code));
1192
1193                /* use a larger default input buffer for MT devices */
1194                if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1195                        input_set_events_per_packet(input, 60);
1196        }
1197
1198        if (usage->type == EV_ABS &&
1199            (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1200                int i;
1201                for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1202                        input_set_abs_params(input, i, -1, 1, 0, 0);
1203                        set_bit(i, input->absbit);
1204                }
1205                if (usage->hat_dir && !field->dpad)
1206                        field->dpad = usage->code;
1207        }
1208
1209        /* for those devices which produce Consumer volume usage as relative,
1210         * we emulate pressing volumeup/volumedown appropriate number of times
1211         * in hidinput_hid_event()
1212         */
1213        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1214                        (usage->code == ABS_VOLUME)) {
1215                set_bit(KEY_VOLUMEUP, input->keybit);
1216                set_bit(KEY_VOLUMEDOWN, input->keybit);
1217        }
1218
1219        if (usage->type == EV_KEY) {
1220                set_bit(EV_MSC, input->evbit);
1221                set_bit(MSC_SCAN, input->mscbit);
1222        }
1223
1224        return;
1225
1226ignore:
1227        usage->type = 0;
1228        usage->code = 0;
1229}
1230
1231static void hidinput_handle_scroll(struct hid_usage *usage,
1232                                   struct input_dev *input,
1233                                   __s32 value)
1234{
1235        int code;
1236        int hi_res, lo_res;
1237
1238        if (value == 0)
1239                return;
1240
1241        if (usage->code == REL_WHEEL_HI_RES)
1242                code = REL_WHEEL;
1243        else
1244                code = REL_HWHEEL;
1245
1246        /*
1247         * Windows reports one wheel click as value 120. Where a high-res
1248         * scroll wheel is present, a fraction of 120 is reported instead.
1249         * Our REL_WHEEL_HI_RES axis does the same because all HW must
1250         * adhere to the 120 expectation.
1251         */
1252        hi_res = value * 120/usage->resolution_multiplier;
1253
1254        usage->wheel_accumulated += hi_res;
1255        lo_res = usage->wheel_accumulated/120;
1256        if (lo_res)
1257                usage->wheel_accumulated -= lo_res * 120;
1258
1259        input_event(input, EV_REL, code, lo_res);
1260        input_event(input, EV_REL, usage->code, hi_res);
1261}
1262
1263void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1264{
1265        struct input_dev *input;
1266        unsigned *quirks = &hid->quirks;
1267
1268        if (!usage->type)
1269                return;
1270
1271        if (usage->type == EV_PWR) {
1272                hidinput_update_battery(hid, value);
1273                return;
1274        }
1275
1276        if (!field->hidinput)
1277                return;
1278
1279        input = field->hidinput->input;
1280
1281        if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1282                int hat_dir = usage->hat_dir;
1283                if (!hat_dir)
1284                        hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1285                if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1286                input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1287                input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1288                return;
1289        }
1290
1291        if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1292                *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1293                return;
1294        }
1295
1296        if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1297                if (value) {
1298                        input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1299                        return;
1300                }
1301                input_event(input, usage->type, usage->code, 0);
1302                input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1303                return;
1304        }
1305
1306        if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1307                int a = field->logical_minimum;
1308                int b = field->logical_maximum;
1309                input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1310        }
1311
1312        if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1313                dbg_hid("Maximum Effects - %d\n",value);
1314                return;
1315        }
1316
1317        if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1318                dbg_hid("PID Pool Report\n");
1319                return;
1320        }
1321
1322        if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1323                return;
1324
1325        if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
1326                                        usage->code == REL_HWHEEL_HI_RES)) {
1327                hidinput_handle_scroll(usage, input, value);
1328                return;
1329        }
1330
1331        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1332                        (usage->code == ABS_VOLUME)) {
1333                int count = abs(value);
1334                int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1335                int i;
1336
1337                for (i = 0; i < count; i++) {
1338                        input_event(input, EV_KEY, direction, 1);
1339                        input_sync(input);
1340                        input_event(input, EV_KEY, direction, 0);
1341                        input_sync(input);
1342                }
1343                return;
1344        }
1345
1346        /*
1347         * Ignore out-of-range values as per HID specification,
1348         * section 5.10 and 6.2.25, when NULL state bit is present.
1349         * When it's not, clamp the value to match Microsoft's input
1350         * driver as mentioned in "Required HID usages for digitizers":
1351         * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1352         *
1353         * The logical_minimum < logical_maximum check is done so that we
1354         * don't unintentionally discard values sent by devices which
1355         * don't specify logical min and max.
1356         */
1357        if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1358            (field->logical_minimum < field->logical_maximum)) {
1359                if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1360                    (value < field->logical_minimum ||
1361                     value > field->logical_maximum)) {
1362                        dbg_hid("Ignoring out-of-range value %x\n", value);
1363                        return;
1364                }
1365                value = clamp(value,
1366                              field->logical_minimum,
1367                              field->logical_maximum);
1368        }
1369
1370        /*
1371         * Ignore reports for absolute data if the data didn't change. This is
1372         * not only an optimization but also fixes 'dead' key reports. Some
1373         * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1374         * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1375         * can only have one of them physically available. The 'dead' keys
1376         * report constant 0. As all map to the same keycode, they'd confuse
1377         * the input layer. If we filter the 'dead' keys on the HID level, we
1378         * skip the keycode translation and only forward real events.
1379         */
1380        if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1381                              HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1382                              (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1383            usage->usage_index < field->maxusage &&
1384            value == field->value[usage->usage_index])
1385                return;
1386
1387        /* report the usage code as scancode if the key status has changed */
1388        if (usage->type == EV_KEY &&
1389            (!test_bit(usage->code, input->key)) == value)
1390                input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1391
1392        input_event(input, usage->type, usage->code, value);
1393
1394        if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1395            usage->type == EV_KEY && value) {
1396                input_sync(input);
1397                input_event(input, usage->type, usage->code, 0);
1398        }
1399}
1400
1401void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1402{
1403        struct hid_input *hidinput;
1404
1405        if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1406                return;
1407
1408        list_for_each_entry(hidinput, &hid->inputs, list)
1409                input_sync(hidinput->input);
1410}
1411EXPORT_SYMBOL_GPL(hidinput_report_event);
1412
1413int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1414{
1415        struct hid_report *report;
1416        int i, j;
1417
1418        list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1419                for (i = 0; i < report->maxfield; i++) {
1420                        *field = report->field[i];
1421                        for (j = 0; j < (*field)->maxusage; j++)
1422                                if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1423                                        return j;
1424                }
1425        }
1426        return -1;
1427}
1428EXPORT_SYMBOL_GPL(hidinput_find_field);
1429
1430struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1431{
1432        struct hid_report *report;
1433        struct hid_field *field;
1434        int i, j;
1435
1436        list_for_each_entry(report,
1437                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1438                            list) {
1439                for (i = 0; i < report->maxfield; i++) {
1440                        field = report->field[i];
1441                        for (j = 0; j < field->maxusage; j++)
1442                                if (field->usage[j].type == EV_LED)
1443                                        return field;
1444                }
1445        }
1446        return NULL;
1447}
1448EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1449
1450unsigned int hidinput_count_leds(struct hid_device *hid)
1451{
1452        struct hid_report *report;
1453        struct hid_field *field;
1454        int i, j;
1455        unsigned int count = 0;
1456
1457        list_for_each_entry(report,
1458                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1459                            list) {
1460                for (i = 0; i < report->maxfield; i++) {
1461                        field = report->field[i];
1462                        for (j = 0; j < field->maxusage; j++)
1463                                if (field->usage[j].type == EV_LED &&
1464                                    field->value[j])
1465                                        count += 1;
1466                }
1467        }
1468        return count;
1469}
1470EXPORT_SYMBOL_GPL(hidinput_count_leds);
1471
1472static void hidinput_led_worker(struct work_struct *work)
1473{
1474        struct hid_device *hid = container_of(work, struct hid_device,
1475                                              led_work);
1476        struct hid_field *field;
1477        struct hid_report *report;
1478        int ret;
1479        u32 len;
1480        __u8 *buf;
1481
1482        field = hidinput_get_led_field(hid);
1483        if (!field)
1484                return;
1485
1486        /*
1487         * field->report is accessed unlocked regarding HID core. So there might
1488         * be another incoming SET-LED request from user-space, which changes
1489         * the LED state while we assemble our outgoing buffer. However, this
1490         * doesn't matter as hid_output_report() correctly converts it into a
1491         * boolean value no matter what information is currently set on the LED
1492         * field (even garbage). So the remote device will always get a valid
1493         * request.
1494         * And in case we send a wrong value, a next led worker is spawned
1495         * for every SET-LED request so the following worker will send the
1496         * correct value, guaranteed!
1497         */
1498
1499        report = field->report;
1500
1501        /* use custom SET_REPORT request if possible (asynchronous) */
1502        if (hid->ll_driver->request)
1503                return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1504
1505        /* fall back to generic raw-output-report */
1506        len = hid_report_len(report);
1507        buf = hid_alloc_report_buf(report, GFP_KERNEL);
1508        if (!buf)
1509                return;
1510
1511        hid_output_report(report, buf);
1512        /* synchronous output report */
1513        ret = hid_hw_output_report(hid, buf, len);
1514        if (ret == -ENOSYS)
1515                hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1516                                HID_REQ_SET_REPORT);
1517        kfree(buf);
1518}
1519
1520static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1521                                unsigned int code, int value)
1522{
1523        struct hid_device *hid = input_get_drvdata(dev);
1524        struct hid_field *field;
1525        int offset;
1526
1527        if (type == EV_FF)
1528                return input_ff_event(dev, type, code, value);
1529
1530        if (type != EV_LED)
1531                return -1;
1532
1533        if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1534                hid_warn(dev, "event field not found\n");
1535                return -1;
1536        }
1537
1538        hid_set_field(field, offset, value);
1539
1540        schedule_work(&hid->led_work);
1541        return 0;
1542}
1543
1544static int hidinput_open(struct input_dev *dev)
1545{
1546        struct hid_device *hid = input_get_drvdata(dev);
1547
1548        return hid_hw_open(hid);
1549}
1550
1551static void hidinput_close(struct input_dev *dev)
1552{
1553        struct hid_device *hid = input_get_drvdata(dev);
1554
1555        hid_hw_close(hid);
1556}
1557
1558static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1559                struct hid_report *report, bool use_logical_max)
1560{
1561        struct hid_usage *usage;
1562        bool update_needed = false;
1563        int i, j;
1564
1565        if (report->maxfield == 0)
1566                return false;
1567
1568        /*
1569         * If we have more than one feature within this report we
1570         * need to fill in the bits from the others before we can
1571         * overwrite the ones for the Resolution Multiplier.
1572         */
1573        if (report->maxfield > 1) {
1574                hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1575                hid_hw_wait(hid);
1576        }
1577
1578        for (i = 0; i < report->maxfield; i++) {
1579                __s32 value = use_logical_max ?
1580                              report->field[i]->logical_maximum :
1581                              report->field[i]->logical_minimum;
1582
1583                /* There is no good reason for a Resolution
1584                 * Multiplier to have a count other than 1.
1585                 * Ignore that case.
1586                 */
1587                if (report->field[i]->report_count != 1)
1588                        continue;
1589
1590                for (j = 0; j < report->field[i]->maxusage; j++) {
1591                        usage = &report->field[i]->usage[j];
1592
1593                        if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1594                                continue;
1595
1596                        report->field[i]->value[j] = value;
1597                        update_needed = true;
1598                }
1599        }
1600
1601        return update_needed;
1602}
1603
1604static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1605{
1606        struct hid_report_enum *rep_enum;
1607        struct hid_report *rep;
1608        int ret;
1609
1610        rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1611        list_for_each_entry(rep, &rep_enum->report_list, list) {
1612                bool update_needed = __hidinput_change_resolution_multipliers(hid,
1613                                                                     rep, true);
1614
1615                if (update_needed) {
1616                        ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1617                        if (ret) {
1618                                __hidinput_change_resolution_multipliers(hid,
1619                                                                    rep, false);
1620                                return;
1621                        }
1622                }
1623        }
1624
1625        /* refresh our structs */
1626        hid_setup_resolution_multiplier(hid);
1627}
1628
1629static void report_features(struct hid_device *hid)
1630{
1631        struct hid_driver *drv = hid->driver;
1632        struct hid_report_enum *rep_enum;
1633        struct hid_report *rep;
1634        struct hid_usage *usage;
1635        int i, j;
1636
1637        rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1638        list_for_each_entry(rep, &rep_enum->report_list, list)
1639                for (i = 0; i < rep->maxfield; i++) {
1640                        /* Ignore if report count is out of bounds. */
1641                        if (rep->field[i]->report_count < 1)
1642                                continue;
1643
1644                        for (j = 0; j < rep->field[i]->maxusage; j++) {
1645                                usage = &rep->field[i]->usage[j];
1646
1647                                /* Verify if Battery Strength feature is available */
1648                                if (usage->hid == HID_DC_BATTERYSTRENGTH)
1649                                        hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1650                                                               rep->field[i]);
1651
1652                                if (drv->feature_mapping)
1653                                        drv->feature_mapping(hid, rep->field[i], usage);
1654                        }
1655                }
1656}
1657
1658static struct hid_input *hidinput_allocate(struct hid_device *hid,
1659                                           unsigned int application)
1660{
1661        struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1662        struct input_dev *input_dev = input_allocate_device();
1663        const char *suffix = NULL;
1664        size_t suffix_len, name_len;
1665
1666        if (!hidinput || !input_dev)
1667                goto fail;
1668
1669        if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1670            hid->maxapplication > 1) {
1671                switch (application) {
1672                case HID_GD_KEYBOARD:
1673                        suffix = "Keyboard";
1674                        break;
1675                case HID_GD_KEYPAD:
1676                        suffix = "Keypad";
1677                        break;
1678                case HID_GD_MOUSE:
1679                        suffix = "Mouse";
1680                        break;
1681                case HID_DG_STYLUS:
1682                        suffix = "Pen";
1683                        break;
1684                case HID_DG_TOUCHSCREEN:
1685                        suffix = "Touchscreen";
1686                        break;
1687                case HID_DG_TOUCHPAD:
1688                        suffix = "Touchpad";
1689                        break;
1690                case HID_GD_SYSTEM_CONTROL:
1691                        suffix = "System Control";
1692                        break;
1693                case HID_CP_CONSUMER_CONTROL:
1694                        suffix = "Consumer Control";
1695                        break;
1696                case HID_GD_WIRELESS_RADIO_CTLS:
1697                        suffix = "Wireless Radio Control";
1698                        break;
1699                case HID_GD_SYSTEM_MULTIAXIS:
1700                        suffix = "System Multi Axis";
1701                        break;
1702                default:
1703                        break;
1704                }
1705        }
1706
1707        if (suffix) {
1708                name_len = strlen(hid->name);
1709                suffix_len = strlen(suffix);
1710                if ((name_len < suffix_len) ||
1711                    strcmp(hid->name + name_len - suffix_len, suffix)) {
1712                        hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
1713                                                   hid->name, suffix);
1714                        if (!hidinput->name)
1715                                goto fail;
1716                }
1717        }
1718
1719        input_set_drvdata(input_dev, hid);
1720        input_dev->event = hidinput_input_event;
1721        input_dev->open = hidinput_open;
1722        input_dev->close = hidinput_close;
1723        input_dev->setkeycode = hidinput_setkeycode;
1724        input_dev->getkeycode = hidinput_getkeycode;
1725
1726        input_dev->name = hidinput->name ? hidinput->name : hid->name;
1727        input_dev->phys = hid->phys;
1728        input_dev->uniq = hid->uniq;
1729        input_dev->id.bustype = hid->bus;
1730        input_dev->id.vendor  = hid->vendor;
1731        input_dev->id.product = hid->product;
1732        input_dev->id.version = hid->version;
1733        input_dev->dev.parent = &hid->dev;
1734
1735        hidinput->input = input_dev;
1736        hidinput->application = application;
1737        list_add_tail(&hidinput->list, &hid->inputs);
1738
1739        INIT_LIST_HEAD(&hidinput->reports);
1740
1741        return hidinput;
1742
1743fail:
1744        kfree(hidinput);
1745        input_free_device(input_dev);
1746        hid_err(hid, "Out of memory during hid input probe\n");
1747        return NULL;
1748}
1749
1750static bool hidinput_has_been_populated(struct hid_input *hidinput)
1751{
1752        int i;
1753        unsigned long r = 0;
1754
1755        for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1756                r |= hidinput->input->evbit[i];
1757
1758        for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1759                r |= hidinput->input->keybit[i];
1760
1761        for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1762                r |= hidinput->input->relbit[i];
1763
1764        for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1765                r |= hidinput->input->absbit[i];
1766
1767        for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1768                r |= hidinput->input->mscbit[i];
1769
1770        for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1771                r |= hidinput->input->ledbit[i];
1772
1773        for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1774                r |= hidinput->input->sndbit[i];
1775
1776        for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1777                r |= hidinput->input->ffbit[i];
1778
1779        for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1780                r |= hidinput->input->swbit[i];
1781
1782        return !!r;
1783}
1784
1785static void hidinput_cleanup_hidinput(struct hid_device *hid,
1786                struct hid_input *hidinput)
1787{
1788        struct hid_report *report;
1789        int i, k;
1790
1791        list_del(&hidinput->list);
1792        input_free_device(hidinput->input);
1793        kfree(hidinput->name);
1794
1795        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1796                if (k == HID_OUTPUT_REPORT &&
1797                        hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1798                        continue;
1799
1800                list_for_each_entry(report, &hid->report_enum[k].report_list,
1801                                    list) {
1802
1803                        for (i = 0; i < report->maxfield; i++)
1804                                if (report->field[i]->hidinput == hidinput)
1805                                        report->field[i]->hidinput = NULL;
1806                }
1807        }
1808
1809        kfree(hidinput);
1810}
1811
1812static struct hid_input *hidinput_match(struct hid_report *report)
1813{
1814        struct hid_device *hid = report->device;
1815        struct hid_input *hidinput;
1816
1817        list_for_each_entry(hidinput, &hid->inputs, list) {
1818                if (hidinput->report &&
1819                    hidinput->report->id == report->id)
1820                        return hidinput;
1821        }
1822
1823        return NULL;
1824}
1825
1826static struct hid_input *hidinput_match_application(struct hid_report *report)
1827{
1828        struct hid_device *hid = report->device;
1829        struct hid_input *hidinput;
1830
1831        list_for_each_entry(hidinput, &hid->inputs, list) {
1832                if (hidinput->application == report->application)
1833                        return hidinput;
1834        }
1835
1836        return NULL;
1837}
1838
1839static inline void hidinput_configure_usages(struct hid_input *hidinput,
1840                                             struct hid_report *report)
1841{
1842        int i, j;
1843
1844        for (i = 0; i < report->maxfield; i++)
1845                for (j = 0; j < report->field[i]->maxusage; j++)
1846                        hidinput_configure_usage(hidinput, report->field[i],
1847                                                 report->field[i]->usage + j);
1848}
1849
1850/*
1851 * Register the input device; print a message.
1852 * Configure the input layer interface
1853 * Read all reports and initialize the absolute field values.
1854 */
1855
1856int hidinput_connect(struct hid_device *hid, unsigned int force)
1857{
1858        struct hid_driver *drv = hid->driver;
1859        struct hid_report *report;
1860        struct hid_input *next, *hidinput = NULL;
1861        unsigned int application;
1862        int i, k;
1863
1864        INIT_LIST_HEAD(&hid->inputs);
1865        INIT_WORK(&hid->led_work, hidinput_led_worker);
1866
1867        hid->status &= ~HID_STAT_DUP_DETECTED;
1868
1869        if (!force) {
1870                for (i = 0; i < hid->maxcollection; i++) {
1871                        struct hid_collection *col = &hid->collection[i];
1872                        if (col->type == HID_COLLECTION_APPLICATION ||
1873                                        col->type == HID_COLLECTION_PHYSICAL)
1874                                if (IS_INPUT_APPLICATION(col->usage))
1875                                        break;
1876                }
1877
1878                if (i == hid->maxcollection)
1879                        return -1;
1880        }
1881
1882        report_features(hid);
1883
1884        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1885                if (k == HID_OUTPUT_REPORT &&
1886                        hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1887                        continue;
1888
1889                list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1890
1891                        if (!report->maxfield)
1892                                continue;
1893
1894                        application = report->application;
1895
1896                        /*
1897                         * Find the previous hidinput report attached
1898                         * to this report id.
1899                         */
1900                        if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1901                                hidinput = hidinput_match(report);
1902                        else if (hid->maxapplication > 1 &&
1903                                 (hid->quirks & HID_QUIRK_INPUT_PER_APP))
1904                                hidinput = hidinput_match_application(report);
1905
1906                        if (!hidinput) {
1907                                hidinput = hidinput_allocate(hid, application);
1908                                if (!hidinput)
1909                                        goto out_unwind;
1910                        }
1911
1912                        hidinput_configure_usages(hidinput, report);
1913
1914                        if (hid->quirks & HID_QUIRK_MULTI_INPUT)
1915                                hidinput->report = report;
1916
1917                        list_add_tail(&report->hidinput_list,
1918                                      &hidinput->reports);
1919                }
1920        }
1921
1922        hidinput_change_resolution_multipliers(hid);
1923
1924        list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1925                if (drv->input_configured &&
1926                    drv->input_configured(hid, hidinput))
1927                        goto out_unwind;
1928
1929                if (!hidinput_has_been_populated(hidinput)) {
1930                        /* no need to register an input device not populated */
1931                        hidinput_cleanup_hidinput(hid, hidinput);
1932                        continue;
1933                }
1934
1935                if (input_register_device(hidinput->input))
1936                        goto out_unwind;
1937                hidinput->registered = true;
1938        }
1939
1940        if (list_empty(&hid->inputs)) {
1941                hid_err(hid, "No inputs registered, leaving\n");
1942                goto out_unwind;
1943        }
1944
1945        if (hid->status & HID_STAT_DUP_DETECTED)
1946                hid_dbg(hid,
1947                        "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
1948
1949        return 0;
1950
1951out_unwind:
1952        /* unwind the ones we already registered */
1953        hidinput_disconnect(hid);
1954
1955        return -1;
1956}
1957EXPORT_SYMBOL_GPL(hidinput_connect);
1958
1959void hidinput_disconnect(struct hid_device *hid)
1960{
1961        struct hid_input *hidinput, *next;
1962
1963        hidinput_cleanup_battery(hid);
1964
1965        list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1966                list_del(&hidinput->list);
1967                if (hidinput->registered)
1968                        input_unregister_device(hidinput->input);
1969                else
1970                        input_free_device(hidinput->input);
1971                kfree(hidinput->name);
1972                kfree(hidinput);
1973        }
1974
1975        /* led_work is spawned by input_dev callbacks, but doesn't access the
1976         * parent input_dev at all. Once all input devices are removed, we
1977         * know that led_work will never get restarted, so we can cancel it
1978         * synchronously and are safe. */
1979        cancel_work_sync(&hid->led_work);
1980}
1981EXPORT_SYMBOL_GPL(hidinput_disconnect);
1982