linux/drivers/hid/hid-input.c
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   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
  39static 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
  58static 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
  73static 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
  79static 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
  88static bool match_index(struct hid_usage *usage,
  89                        unsigned int cur_idx, unsigned int idx)
  90{
  91        return cur_idx == idx;
  92}
  93
  94typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
  95                                unsigned int cur_idx, unsigned int val);
  96
  97static 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
 126static 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
 143static 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
 164static 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 * hidinput_calc_abs_res - calculate an absolute axis resolution
 197 * @field: the HID report field to calculate resolution for
 198 * @code: axis code
 199 *
 200 * The formula is:
 201 *                         (logical_maximum - logical_minimum)
 202 * resolution = ----------------------------------------------------------
 203 *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 204 *
 205 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 206 *
 207 * Only exponent 1 length units are processed. Centimeters and inches are
 208 * converted to millimeters. Degrees are converted to radians.
 209 */
 210__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 211{
 212        __s32 unit_exponent = field->unit_exponent;
 213        __s32 logical_extents = field->logical_maximum -
 214                                        field->logical_minimum;
 215        __s32 physical_extents = field->physical_maximum -
 216                                        field->physical_minimum;
 217        __s32 prev;
 218
 219        /* Check if the extents are sane */
 220        if (logical_extents <= 0 || physical_extents <= 0)
 221                return 0;
 222
 223        /*
 224         * Verify and convert units.
 225         * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 226         */
 227        switch (code) {
 228        case ABS_X:
 229        case ABS_Y:
 230        case ABS_Z:
 231        case ABS_MT_POSITION_X:
 232        case ABS_MT_POSITION_Y:
 233        case ABS_MT_TOOL_X:
 234        case ABS_MT_TOOL_Y:
 235        case ABS_MT_TOUCH_MAJOR:
 236        case ABS_MT_TOUCH_MINOR:
 237                if (field->unit & 0xffffff00)           /* Not a length */
 238                        return 0;
 239                unit_exponent += hid_snto32(field->unit >> 4, 4) - 1;
 240                switch (field->unit & 0xf) {
 241                case 0x1:                               /* If centimeters */
 242                        /* Convert to millimeters */
 243                        unit_exponent += 1;
 244                        break;
 245                case 0x3:                               /* If inches */
 246                        /* Convert to millimeters */
 247                        prev = physical_extents;
 248                        physical_extents *= 254;
 249                        if (physical_extents < prev)
 250                                return 0;
 251                        unit_exponent -= 1;
 252                        break;
 253                default:
 254                        return 0;
 255                }
 256                break;
 257
 258        case ABS_RX:
 259        case ABS_RY:
 260        case ABS_RZ:
 261        case ABS_TILT_X:
 262        case ABS_TILT_Y:
 263                if (field->unit == 0x14) {              /* If degrees */
 264                        /* Convert to radians */
 265                        prev = logical_extents;
 266                        logical_extents *= 573;
 267                        if (logical_extents < prev)
 268                                return 0;
 269                        unit_exponent += 1;
 270                } else if (field->unit != 0x12) {       /* If not radians */
 271                        return 0;
 272                }
 273                break;
 274
 275        default:
 276                return 0;
 277        }
 278
 279        /* Apply negative unit exponent */
 280        for (; unit_exponent < 0; unit_exponent++) {
 281                prev = logical_extents;
 282                logical_extents *= 10;
 283                if (logical_extents < prev)
 284                        return 0;
 285        }
 286        /* Apply positive unit exponent */
 287        for (; unit_exponent > 0; unit_exponent--) {
 288                prev = physical_extents;
 289                physical_extents *= 10;
 290                if (physical_extents < prev)
 291                        return 0;
 292        }
 293
 294        /* Calculate resolution */
 295        return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 296}
 297EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 298
 299#ifdef CONFIG_HID_BATTERY_STRENGTH
 300static enum power_supply_property hidinput_battery_props[] = {
 301        POWER_SUPPLY_PROP_PRESENT,
 302        POWER_SUPPLY_PROP_ONLINE,
 303        POWER_SUPPLY_PROP_CAPACITY,
 304        POWER_SUPPLY_PROP_MODEL_NAME,
 305        POWER_SUPPLY_PROP_STATUS,
 306        POWER_SUPPLY_PROP_SCOPE,
 307};
 308
 309#define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 310#define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 311
 312static const struct hid_device_id hid_battery_quirks[] = {
 313        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 314                        USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 315        HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 316        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 317                               USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 318          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 319        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 320                USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 321          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 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_get_battery_property(struct power_supply *psy,
 338                                         enum power_supply_property prop,
 339                                         union power_supply_propval *val)
 340{
 341        struct hid_device *dev = container_of(psy, struct hid_device, battery);
 342        int ret = 0;
 343        __u8 buf[2] = {};
 344
 345        switch (prop) {
 346        case POWER_SUPPLY_PROP_PRESENT:
 347        case POWER_SUPPLY_PROP_ONLINE:
 348                val->intval = 1;
 349                break;
 350
 351        case POWER_SUPPLY_PROP_CAPACITY:
 352                ret = dev->hid_get_raw_report(dev, dev->battery_report_id,
 353                                              buf, sizeof(buf),
 354                                              dev->battery_report_type);
 355
 356                if (ret != 2) {
 357                        if (ret >= 0)
 358                                ret = -EINVAL;
 359                        break;
 360                }
 361
 362                if (dev->battery_min < dev->battery_max &&
 363                    buf[1] >= dev->battery_min &&
 364                    buf[1] <= dev->battery_max)
 365                        val->intval = (100 * (buf[1] - dev->battery_min)) /
 366                                (dev->battery_max - dev->battery_min);
 367                break;
 368
 369        case POWER_SUPPLY_PROP_MODEL_NAME:
 370                val->strval = dev->name;
 371                break;
 372
 373        case POWER_SUPPLY_PROP_STATUS:
 374                val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 375                break;
 376
 377        case POWER_SUPPLY_PROP_SCOPE:
 378                val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 379                break;
 380
 381        default:
 382                ret = -EINVAL;
 383                break;
 384        }
 385
 386        return ret;
 387}
 388
 389static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 390{
 391        struct power_supply *battery = &dev->battery;
 392        int ret;
 393        unsigned quirks;
 394        s32 min, max;
 395
 396        if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
 397                return false;   /* no match */
 398
 399        if (battery->name != NULL)
 400                goto out;       /* already initialized? */
 401
 402        battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
 403        if (battery->name == NULL)
 404                goto out;
 405
 406        battery->type = POWER_SUPPLY_TYPE_BATTERY;
 407        battery->properties = hidinput_battery_props;
 408        battery->num_properties = ARRAY_SIZE(hidinput_battery_props);
 409        battery->use_for_apm = 0;
 410        battery->get_property = hidinput_get_battery_property;
 411
 412        quirks = find_battery_quirk(dev);
 413
 414        hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 415                dev->bus, dev->vendor, dev->product, dev->version, quirks);
 416
 417        min = field->logical_minimum;
 418        max = field->logical_maximum;
 419
 420        if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 421                min = 0;
 422                max = 100;
 423        }
 424
 425        if (quirks & HID_BATTERY_QUIRK_FEATURE)
 426                report_type = HID_FEATURE_REPORT;
 427
 428        dev->battery_min = min;
 429        dev->battery_max = max;
 430        dev->battery_report_type = report_type;
 431        dev->battery_report_id = field->report->id;
 432
 433        ret = power_supply_register(&dev->dev, battery);
 434        if (ret != 0) {
 435                hid_warn(dev, "can't register power supply: %d\n", ret);
 436                kfree(battery->name);
 437                battery->name = NULL;
 438        }
 439
 440        power_supply_powers(battery, &dev->dev);
 441
 442out:
 443        return true;
 444}
 445
 446static void hidinput_cleanup_battery(struct hid_device *dev)
 447{
 448        if (!dev->battery.name)
 449                return;
 450
 451        power_supply_unregister(&dev->battery);
 452        kfree(dev->battery.name);
 453        dev->battery.name = NULL;
 454}
 455#else  /* !CONFIG_HID_BATTERY_STRENGTH */
 456static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 457                                   struct hid_field *field)
 458{
 459        return false;
 460}
 461
 462static void hidinput_cleanup_battery(struct hid_device *dev)
 463{
 464}
 465#endif  /* CONFIG_HID_BATTERY_STRENGTH */
 466
 467static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 468                                     struct hid_usage *usage)
 469{
 470        struct input_dev *input = hidinput->input;
 471        struct hid_device *device = input_get_drvdata(input);
 472        int max = 0, code;
 473        unsigned long *bit = NULL;
 474
 475        field->hidinput = hidinput;
 476
 477        if (field->flags & HID_MAIN_ITEM_CONSTANT)
 478                goto ignore;
 479
 480        /* only LED usages are supported in output fields */
 481        if (field->report_type == HID_OUTPUT_REPORT &&
 482                        (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 483                goto ignore;
 484        }
 485
 486        if (device->driver->input_mapping) {
 487                int ret = device->driver->input_mapping(device, hidinput, field,
 488                                usage, &bit, &max);
 489                if (ret > 0)
 490                        goto mapped;
 491                if (ret < 0)
 492                        goto ignore;
 493        }
 494
 495        switch (usage->hid & HID_USAGE_PAGE) {
 496        case HID_UP_UNDEFINED:
 497                goto ignore;
 498
 499        case HID_UP_KEYBOARD:
 500                set_bit(EV_REP, input->evbit);
 501
 502                if ((usage->hid & HID_USAGE) < 256) {
 503                        if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 504                        map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 505                } else
 506                        map_key(KEY_UNKNOWN);
 507
 508                break;
 509
 510        case HID_UP_BUTTON:
 511                code = ((usage->hid - 1) & HID_USAGE);
 512
 513                switch (field->application) {
 514                case HID_GD_MOUSE:
 515                case HID_GD_POINTER:  code += BTN_MOUSE; break;
 516                case HID_GD_JOYSTICK:
 517                                if (code <= 0xf)
 518                                        code += BTN_JOYSTICK;
 519                                else
 520                                        code += BTN_TRIGGER_HAPPY - 0x10;
 521                                break;
 522                case HID_GD_GAMEPAD:
 523                                if (code <= 0xf)
 524                                        code += BTN_GAMEPAD;
 525                                else
 526                                        code += BTN_TRIGGER_HAPPY - 0x10;
 527                                break;
 528                default:
 529                        switch (field->physical) {
 530                        case HID_GD_MOUSE:
 531                        case HID_GD_POINTER:  code += BTN_MOUSE; break;
 532                        case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 533                        case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 534                        default:              code += BTN_MISC;
 535                        }
 536                }
 537
 538                map_key(code);
 539                break;
 540
 541        case HID_UP_SIMULATION:
 542                switch (usage->hid & 0xffff) {
 543                case 0xba: map_abs(ABS_RUDDER);   break;
 544                case 0xbb: map_abs(ABS_THROTTLE); break;
 545                case 0xc4: map_abs(ABS_GAS);      break;
 546                case 0xc5: map_abs(ABS_BRAKE);    break;
 547                case 0xc8: map_abs(ABS_WHEEL);    break;
 548                default:   goto ignore;
 549                }
 550                break;
 551
 552        case HID_UP_GENDESK:
 553                if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 554                        switch (usage->hid & 0xf) {
 555                        case 0x1: map_key_clear(KEY_POWER);  break;
 556                        case 0x2: map_key_clear(KEY_SLEEP);  break;
 557                        case 0x3: map_key_clear(KEY_WAKEUP); break;
 558                        case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 559                        case 0x5: map_key_clear(KEY_MENU); break;
 560                        case 0x6: map_key_clear(KEY_PROG1); break;
 561                        case 0x7: map_key_clear(KEY_HELP); break;
 562                        case 0x8: map_key_clear(KEY_EXIT); break;
 563                        case 0x9: map_key_clear(KEY_SELECT); break;
 564                        case 0xa: map_key_clear(KEY_RIGHT); break;
 565                        case 0xb: map_key_clear(KEY_LEFT); break;
 566                        case 0xc: map_key_clear(KEY_UP); break;
 567                        case 0xd: map_key_clear(KEY_DOWN); break;
 568                        case 0xe: map_key_clear(KEY_POWER2); break;
 569                        case 0xf: map_key_clear(KEY_RESTART); break;
 570                        default: goto unknown;
 571                        }
 572                        break;
 573                }
 574
 575                if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 576                        switch (usage->hid) {
 577                        case HID_GD_UP:    usage->hat_dir = 1; break;
 578                        case HID_GD_DOWN:  usage->hat_dir = 5; break;
 579                        case HID_GD_RIGHT: usage->hat_dir = 3; break;
 580                        case HID_GD_LEFT:  usage->hat_dir = 7; break;
 581                        default: goto unknown;
 582                        }
 583                        if (field->dpad) {
 584                                map_abs(field->dpad);
 585                                goto ignore;
 586                        }
 587                        map_abs(ABS_HAT0X);
 588                        break;
 589                }
 590
 591                switch (usage->hid) {
 592                /* These usage IDs map directly to the usage codes. */
 593                case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 594                case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 595                case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 596                        if (field->flags & HID_MAIN_ITEM_RELATIVE)
 597                                map_rel(usage->hid & 0xf);
 598                        else
 599                                map_abs(usage->hid & 0xf);
 600                        break;
 601
 602                case HID_GD_HATSWITCH:
 603                        usage->hat_min = field->logical_minimum;
 604                        usage->hat_max = field->logical_maximum;
 605                        map_abs(ABS_HAT0X);
 606                        break;
 607
 608                case HID_GD_START:      map_key_clear(BTN_START);       break;
 609                case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 610
 611                default: goto unknown;
 612                }
 613
 614                break;
 615
 616        case HID_UP_LED:
 617                switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 618                case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 619                case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 620                case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 621                case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 622                case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 623                case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 624                case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 625                case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 626                case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 627                case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 628                case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 629
 630                default: goto ignore;
 631                }
 632                break;
 633
 634        case HID_UP_DIGITIZER:
 635                switch (usage->hid & 0xff) {
 636                case 0x00: /* Undefined */
 637                        goto ignore;
 638
 639                case 0x30: /* TipPressure */
 640                        if (!test_bit(BTN_TOUCH, input->keybit)) {
 641                                device->quirks |= HID_QUIRK_NOTOUCH;
 642                                set_bit(EV_KEY, input->evbit);
 643                                set_bit(BTN_TOUCH, input->keybit);
 644                        }
 645                        map_abs_clear(ABS_PRESSURE);
 646                        break;
 647
 648                case 0x32: /* InRange */
 649                        switch (field->physical & 0xff) {
 650                        case 0x21: map_key(BTN_TOOL_MOUSE); break;
 651                        case 0x22: map_key(BTN_TOOL_FINGER); break;
 652                        default: map_key(BTN_TOOL_PEN); break;
 653                        }
 654                        break;
 655
 656                case 0x3c: /* Invert */
 657                        map_key_clear(BTN_TOOL_RUBBER);
 658                        break;
 659
 660                case 0x3d: /* X Tilt */
 661                        map_abs_clear(ABS_TILT_X);
 662                        break;
 663
 664                case 0x3e: /* Y Tilt */
 665                        map_abs_clear(ABS_TILT_Y);
 666                        break;
 667
 668                case 0x33: /* Touch */
 669                case 0x42: /* TipSwitch */
 670                case 0x43: /* TipSwitch2 */
 671                        device->quirks &= ~HID_QUIRK_NOTOUCH;
 672                        map_key_clear(BTN_TOUCH);
 673                        break;
 674
 675                case 0x44: /* BarrelSwitch */
 676                        map_key_clear(BTN_STYLUS);
 677                        break;
 678
 679                case 0x46: /* TabletPick */
 680                        map_key_clear(BTN_STYLUS2);
 681                        break;
 682
 683                default:  goto unknown;
 684                }
 685                break;
 686
 687        case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 688                switch (usage->hid & HID_USAGE) {
 689                case 0x000: goto ignore;
 690                case 0x030: map_key_clear(KEY_POWER);           break;
 691                case 0x031: map_key_clear(KEY_RESTART);         break;
 692                case 0x032: map_key_clear(KEY_SLEEP);           break;
 693                case 0x034: map_key_clear(KEY_SLEEP);           break;
 694                case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 695                case 0x036: map_key_clear(BTN_MISC);            break;
 696
 697                case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 698                case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 699                case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 700                case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 701                case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 702                case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 703                case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 704                case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 705                case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 706
 707                case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 708                case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 709                case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 710                case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 711                case 0x069: map_key_clear(KEY_RED);             break;
 712                case 0x06a: map_key_clear(KEY_GREEN);           break;
 713                case 0x06b: map_key_clear(KEY_BLUE);            break;
 714                case 0x06c: map_key_clear(KEY_YELLOW);          break;
 715                case 0x06d: map_key_clear(KEY_ZOOM);            break;
 716
 717                case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 718                case 0x083: map_key_clear(KEY_LAST);            break;
 719                case 0x084: map_key_clear(KEY_ENTER);           break;
 720                case 0x088: map_key_clear(KEY_PC);              break;
 721                case 0x089: map_key_clear(KEY_TV);              break;
 722                case 0x08a: map_key_clear(KEY_WWW);             break;
 723                case 0x08b: map_key_clear(KEY_DVD);             break;
 724                case 0x08c: map_key_clear(KEY_PHONE);           break;
 725                case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 726                case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 727                case 0x08f: map_key_clear(KEY_GAMES);           break;
 728                case 0x090: map_key_clear(KEY_MEMO);            break;
 729                case 0x091: map_key_clear(KEY_CD);              break;
 730                case 0x092: map_key_clear(KEY_VCR);             break;
 731                case 0x093: map_key_clear(KEY_TUNER);           break;
 732                case 0x094: map_key_clear(KEY_EXIT);            break;
 733                case 0x095: map_key_clear(KEY_HELP);            break;
 734                case 0x096: map_key_clear(KEY_TAPE);            break;
 735                case 0x097: map_key_clear(KEY_TV2);             break;
 736                case 0x098: map_key_clear(KEY_SAT);             break;
 737                case 0x09a: map_key_clear(KEY_PVR);             break;
 738
 739                case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 740                case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 741                case 0x0a0: map_key_clear(KEY_VCR2);            break;
 742
 743                case 0x0b0: map_key_clear(KEY_PLAY);            break;
 744                case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 745                case 0x0b2: map_key_clear(KEY_RECORD);          break;
 746                case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 747                case 0x0b4: map_key_clear(KEY_REWIND);          break;
 748                case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 749                case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 750                case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 751                case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 752                case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 753                case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 754                case 0x0bf: map_key_clear(KEY_SLOW);            break;
 755
 756                case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 757                case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 758                case 0x0e2: map_key_clear(KEY_MUTE);            break;
 759                case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 760                case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 761                case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 762                case 0x0f5: map_key_clear(KEY_SLOW);            break;
 763
 764                case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 765                case 0x183: map_key_clear(KEY_CONFIG);          break;
 766                case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 767                case 0x185: map_key_clear(KEY_EDITOR);          break;
 768                case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 769                case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 770                case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 771                case 0x189: map_key_clear(KEY_DATABASE);        break;
 772                case 0x18a: map_key_clear(KEY_MAIL);            break;
 773                case 0x18b: map_key_clear(KEY_NEWS);            break;
 774                case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 775                case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 776                case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 777                case 0x191: map_key_clear(KEY_FINANCE);         break;
 778                case 0x192: map_key_clear(KEY_CALC);            break;
 779                case 0x193: map_key_clear(KEY_PLAYER);          break;
 780                case 0x194: map_key_clear(KEY_FILE);            break;
 781                case 0x196: map_key_clear(KEY_WWW);             break;
 782                case 0x199: map_key_clear(KEY_CHAT);            break;
 783                case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 784                case 0x19e: map_key_clear(KEY_COFFEE);          break;
 785                case 0x1a6: map_key_clear(KEY_HELP);            break;
 786                case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 787                case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 788                case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 789                case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 790                case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 791                case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 792                case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 793                case 0x1bd: map_key_clear(KEY_INFO);            break;
 794                case 0x201: map_key_clear(KEY_NEW);             break;
 795                case 0x202: map_key_clear(KEY_OPEN);            break;
 796                case 0x203: map_key_clear(KEY_CLOSE);           break;
 797                case 0x204: map_key_clear(KEY_EXIT);            break;
 798                case 0x207: map_key_clear(KEY_SAVE);            break;
 799                case 0x208: map_key_clear(KEY_PRINT);           break;
 800                case 0x209: map_key_clear(KEY_PROPS);           break;
 801                case 0x21a: map_key_clear(KEY_UNDO);            break;
 802                case 0x21b: map_key_clear(KEY_COPY);            break;
 803                case 0x21c: map_key_clear(KEY_CUT);             break;
 804                case 0x21d: map_key_clear(KEY_PASTE);           break;
 805                case 0x21f: map_key_clear(KEY_FIND);            break;
 806                case 0x221: map_key_clear(KEY_SEARCH);          break;
 807                case 0x222: map_key_clear(KEY_GOTO);            break;
 808                case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 809                case 0x224: map_key_clear(KEY_BACK);            break;
 810                case 0x225: map_key_clear(KEY_FORWARD);         break;
 811                case 0x226: map_key_clear(KEY_STOP);            break;
 812                case 0x227: map_key_clear(KEY_REFRESH);         break;
 813                case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 814                case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
 815                case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
 816                case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
 817                case 0x233: map_key_clear(KEY_SCROLLUP);        break;
 818                case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
 819                case 0x238: map_rel(REL_HWHEEL);                break;
 820                case 0x23d: map_key_clear(KEY_EDIT);            break;
 821                case 0x25f: map_key_clear(KEY_CANCEL);          break;
 822                case 0x269: map_key_clear(KEY_INSERT);          break;
 823                case 0x26a: map_key_clear(KEY_DELETE);          break;
 824                case 0x279: map_key_clear(KEY_REDO);            break;
 825
 826                case 0x289: map_key_clear(KEY_REPLY);           break;
 827                case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
 828                case 0x28c: map_key_clear(KEY_SEND);            break;
 829
 830                default:    goto ignore;
 831                }
 832                break;
 833
 834        case HID_UP_GENDEVCTRLS:
 835                if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
 836                        goto ignore;
 837                else
 838                        goto unknown;
 839                break;
 840
 841        case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 842                set_bit(EV_REP, input->evbit);
 843                switch (usage->hid & HID_USAGE) {
 844                case 0x021: map_key_clear(KEY_PRINT);           break;
 845                case 0x070: map_key_clear(KEY_HP);              break;
 846                case 0x071: map_key_clear(KEY_CAMERA);          break;
 847                case 0x072: map_key_clear(KEY_SOUND);           break;
 848                case 0x073: map_key_clear(KEY_QUESTION);        break;
 849                case 0x080: map_key_clear(KEY_EMAIL);           break;
 850                case 0x081: map_key_clear(KEY_CHAT);            break;
 851                case 0x082: map_key_clear(KEY_SEARCH);          break;
 852                case 0x083: map_key_clear(KEY_CONNECT);         break;
 853                case 0x084: map_key_clear(KEY_FINANCE);         break;
 854                case 0x085: map_key_clear(KEY_SPORT);           break;
 855                case 0x086: map_key_clear(KEY_SHOP);            break;
 856                default:    goto ignore;
 857                }
 858                break;
 859
 860        case HID_UP_HPVENDOR2:
 861                set_bit(EV_REP, input->evbit);
 862                switch (usage->hid & HID_USAGE) {
 863                case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
 864                case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
 865                default:    goto ignore;
 866                }
 867                break;
 868
 869        case HID_UP_MSVENDOR:
 870                goto ignore;
 871
 872        case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
 873                set_bit(EV_REP, input->evbit);
 874                goto ignore;
 875
 876        case HID_UP_LOGIVENDOR:
 877                goto ignore;
 878
 879        case HID_UP_PID:
 880                switch (usage->hid & HID_USAGE) {
 881                case 0xa4: map_key_clear(BTN_DEAD);     break;
 882                default: goto ignore;
 883                }
 884                break;
 885
 886        default:
 887        unknown:
 888                if (field->report_size == 1) {
 889                        if (field->report->type == HID_OUTPUT_REPORT) {
 890                                map_led(LED_MISC);
 891                                break;
 892                        }
 893                        map_key(BTN_MISC);
 894                        break;
 895                }
 896                if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 897                        map_rel(REL_MISC);
 898                        break;
 899                }
 900                map_abs(ABS_MISC);
 901                break;
 902        }
 903
 904mapped:
 905        if (device->driver->input_mapped && device->driver->input_mapped(device,
 906                                hidinput, field, usage, &bit, &max) < 0)
 907                goto ignore;
 908
 909        set_bit(usage->type, input->evbit);
 910
 911        while (usage->code <= max && test_and_set_bit(usage->code, bit))
 912                usage->code = find_next_zero_bit(bit, max + 1, usage->code);
 913
 914        if (usage->code > max)
 915                goto ignore;
 916
 917
 918        if (usage->type == EV_ABS) {
 919
 920                int a = field->logical_minimum;
 921                int b = field->logical_maximum;
 922
 923                if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
 924                        a = field->logical_minimum = 0;
 925                        b = field->logical_maximum = 255;
 926                }
 927
 928                if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
 929                        input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
 930                else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 931
 932                input_abs_set_res(input, usage->code,
 933                                  hidinput_calc_abs_res(field, usage->code));
 934
 935                /* use a larger default input buffer for MT devices */
 936                if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
 937                        input_set_events_per_packet(input, 60);
 938        }
 939
 940        if (usage->type == EV_ABS &&
 941            (usage->hat_min < usage->hat_max || usage->hat_dir)) {
 942                int i;
 943                for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
 944                        input_set_abs_params(input, i, -1, 1, 0, 0);
 945                        set_bit(i, input->absbit);
 946                }
 947                if (usage->hat_dir && !field->dpad)
 948                        field->dpad = usage->code;
 949        }
 950
 951        /* for those devices which produce Consumer volume usage as relative,
 952         * we emulate pressing volumeup/volumedown appropriate number of times
 953         * in hidinput_hid_event()
 954         */
 955        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
 956                        (usage->code == ABS_VOLUME)) {
 957                set_bit(KEY_VOLUMEUP, input->keybit);
 958                set_bit(KEY_VOLUMEDOWN, input->keybit);
 959        }
 960
 961        if (usage->type == EV_KEY) {
 962                set_bit(EV_MSC, input->evbit);
 963                set_bit(MSC_SCAN, input->mscbit);
 964        }
 965
 966ignore:
 967        return;
 968
 969}
 970
 971void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
 972{
 973        struct input_dev *input;
 974        unsigned *quirks = &hid->quirks;
 975
 976        if (!field->hidinput)
 977                return;
 978
 979        input = field->hidinput->input;
 980
 981        if (!usage->type)
 982                return;
 983
 984        if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 985                int hat_dir = usage->hat_dir;
 986                if (!hat_dir)
 987                        hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
 988                if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
 989                input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
 990                input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
 991                return;
 992        }
 993
 994        if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
 995                *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
 996                return;
 997        }
 998
 999        if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1000                if (value) {
1001                        input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1002                        return;
1003                }
1004                input_event(input, usage->type, usage->code, 0);
1005                input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1006                return;
1007        }
1008
1009        if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1010                int a = field->logical_minimum;
1011                int b = field->logical_maximum;
1012                input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1013        }
1014
1015        if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1016                dbg_hid("Maximum Effects - %d\n",value);
1017                return;
1018        }
1019
1020        if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1021                dbg_hid("PID Pool Report\n");
1022                return;
1023        }
1024
1025        if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1026                return;
1027
1028        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1029                        (usage->code == ABS_VOLUME)) {
1030                int count = abs(value);
1031                int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1032                int i;
1033
1034                for (i = 0; i < count; i++) {
1035                        input_event(input, EV_KEY, direction, 1);
1036                        input_sync(input);
1037                        input_event(input, EV_KEY, direction, 0);
1038                        input_sync(input);
1039                }
1040                return;
1041        }
1042
1043        /*
1044         * Ignore out-of-range values as per HID specification,
1045         * section 5.10 and 6.2.25
1046         */
1047        if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1048            (value < field->logical_minimum ||
1049             value > field->logical_maximum)) {
1050                dbg_hid("Ignoring out-of-range value %x\n", value);
1051                return;
1052        }
1053
1054        /* report the usage code as scancode if the key status has changed */
1055        if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
1056                input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1057
1058        input_event(input, usage->type, usage->code, value);
1059
1060        if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
1061                input_event(input, usage->type, usage->code, 0);
1062}
1063
1064void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1065{
1066        struct hid_input *hidinput;
1067
1068        if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1069                return;
1070
1071        list_for_each_entry(hidinput, &hid->inputs, list)
1072                input_sync(hidinput->input);
1073}
1074EXPORT_SYMBOL_GPL(hidinput_report_event);
1075
1076int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1077{
1078        struct hid_report *report;
1079        int i, j;
1080
1081        list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1082                for (i = 0; i < report->maxfield; i++) {
1083                        *field = report->field[i];
1084                        for (j = 0; j < (*field)->maxusage; j++)
1085                                if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1086                                        return j;
1087                }
1088        }
1089        return -1;
1090}
1091EXPORT_SYMBOL_GPL(hidinput_find_field);
1092
1093struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1094{
1095        struct hid_report *report;
1096        struct hid_field *field;
1097        int i, j;
1098
1099        list_for_each_entry(report,
1100                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1101                            list) {
1102                for (i = 0; i < report->maxfield; i++) {
1103                        field = report->field[i];
1104                        for (j = 0; j < field->maxusage; j++)
1105                                if (field->usage[j].type == EV_LED)
1106                                        return field;
1107                }
1108        }
1109        return NULL;
1110}
1111EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1112
1113unsigned int hidinput_count_leds(struct hid_device *hid)
1114{
1115        struct hid_report *report;
1116        struct hid_field *field;
1117        int i, j;
1118        unsigned int count = 0;
1119
1120        list_for_each_entry(report,
1121                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1122                            list) {
1123                for (i = 0; i < report->maxfield; i++) {
1124                        field = report->field[i];
1125                        for (j = 0; j < field->maxusage; j++)
1126                                if (field->usage[j].type == EV_LED &&
1127                                    field->value[j])
1128                                        count += 1;
1129                }
1130        }
1131        return count;
1132}
1133EXPORT_SYMBOL_GPL(hidinput_count_leds);
1134
1135static int hidinput_open(struct input_dev *dev)
1136{
1137        struct hid_device *hid = input_get_drvdata(dev);
1138
1139        return hid_hw_open(hid);
1140}
1141
1142static void hidinput_close(struct input_dev *dev)
1143{
1144        struct hid_device *hid = input_get_drvdata(dev);
1145
1146        hid_hw_close(hid);
1147}
1148
1149static void report_features(struct hid_device *hid)
1150{
1151        struct hid_driver *drv = hid->driver;
1152        struct hid_report_enum *rep_enum;
1153        struct hid_report *rep;
1154        int i, j;
1155
1156        rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1157        list_for_each_entry(rep, &rep_enum->report_list, list)
1158                for (i = 0; i < rep->maxfield; i++)
1159                        for (j = 0; j < rep->field[i]->maxusage; j++) {
1160                                /* Verify if Battery Strength feature is available */
1161                                hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1162
1163                                if (drv->feature_mapping)
1164                                        drv->feature_mapping(hid, rep->field[i],
1165                                                             rep->field[i]->usage + j);
1166                        }
1167}
1168
1169static struct hid_input *hidinput_allocate(struct hid_device *hid)
1170{
1171        struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1172        struct input_dev *input_dev = input_allocate_device();
1173        if (!hidinput || !input_dev) {
1174                kfree(hidinput);
1175                input_free_device(input_dev);
1176                hid_err(hid, "Out of memory during hid input probe\n");
1177                return NULL;
1178        }
1179
1180        input_set_drvdata(input_dev, hid);
1181        input_dev->event = hid->ll_driver->hidinput_input_event;
1182        input_dev->open = hidinput_open;
1183        input_dev->close = hidinput_close;
1184        input_dev->setkeycode = hidinput_setkeycode;
1185        input_dev->getkeycode = hidinput_getkeycode;
1186
1187        input_dev->name = hid->name;
1188        input_dev->phys = hid->phys;
1189        input_dev->uniq = hid->uniq;
1190        input_dev->id.bustype = hid->bus;
1191        input_dev->id.vendor  = hid->vendor;
1192        input_dev->id.product = hid->product;
1193        input_dev->id.version = hid->version;
1194        input_dev->dev.parent = hid->dev.parent;
1195        hidinput->input = input_dev;
1196        list_add_tail(&hidinput->list, &hid->inputs);
1197
1198        return hidinput;
1199}
1200
1201/*
1202 * Register the input device; print a message.
1203 * Configure the input layer interface
1204 * Read all reports and initialize the absolute field values.
1205 */
1206
1207int hidinput_connect(struct hid_device *hid, unsigned int force)
1208{
1209        struct hid_driver *drv = hid->driver;
1210        struct hid_report *report;
1211        struct hid_input *hidinput = NULL;
1212        int i, j, k;
1213
1214        INIT_LIST_HEAD(&hid->inputs);
1215
1216        if (!force) {
1217                for (i = 0; i < hid->maxcollection; i++) {
1218                        struct hid_collection *col = &hid->collection[i];
1219                        if (col->type == HID_COLLECTION_APPLICATION ||
1220                                        col->type == HID_COLLECTION_PHYSICAL)
1221                                if (IS_INPUT_APPLICATION(col->usage))
1222                                        break;
1223                }
1224
1225                if (i == hid->maxcollection)
1226                        return -1;
1227        }
1228
1229        report_features(hid);
1230
1231        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1232                if (k == HID_OUTPUT_REPORT &&
1233                        hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1234                        continue;
1235
1236                list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1237
1238                        if (!report->maxfield)
1239                                continue;
1240
1241                        if (!hidinput) {
1242                                hidinput = hidinput_allocate(hid);
1243                                if (!hidinput)
1244                                        goto out_unwind;
1245                        }
1246
1247                        for (i = 0; i < report->maxfield; i++)
1248                                for (j = 0; j < report->field[i]->maxusage; j++)
1249                                        hidinput_configure_usage(hidinput, report->field[i],
1250                                                                 report->field[i]->usage + j);
1251
1252                        if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1253                                /* This will leave hidinput NULL, so that it
1254                                 * allocates another one if we have more inputs on
1255                                 * the same interface. Some devices (e.g. Happ's
1256                                 * UGCI) cram a lot of unrelated inputs into the
1257                                 * same interface. */
1258                                hidinput->report = report;
1259                                if (drv->input_configured)
1260                                        drv->input_configured(hid, hidinput);
1261                                if (input_register_device(hidinput->input))
1262                                        goto out_cleanup;
1263                                hidinput = NULL;
1264                        }
1265                }
1266        }
1267
1268        if (hidinput) {
1269                if (drv->input_configured)
1270                        drv->input_configured(hid, hidinput);
1271                if (input_register_device(hidinput->input))
1272                        goto out_cleanup;
1273        }
1274
1275        return 0;
1276
1277out_cleanup:
1278        list_del(&hidinput->list);
1279        input_free_device(hidinput->input);
1280        kfree(hidinput);
1281out_unwind:
1282        /* unwind the ones we already registered */
1283        hidinput_disconnect(hid);
1284
1285        return -1;
1286}
1287EXPORT_SYMBOL_GPL(hidinput_connect);
1288
1289void hidinput_disconnect(struct hid_device *hid)
1290{
1291        struct hid_input *hidinput, *next;
1292
1293        hidinput_cleanup_battery(hid);
1294
1295        list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1296                list_del(&hidinput->list);
1297                input_unregister_device(hidinput->input);
1298                kfree(hidinput);
1299        }
1300}
1301EXPORT_SYMBOL_GPL(hidinput_disconnect);
1302
1303
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