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/**
 197 * hidinput_calc_abs_res - calculate an absolute axis resolution
 198 * @field: the HID report field to calculate resolution for
 199 * @code: axis code
 200 *
 201 * The formula is:
 202 *                         (logical_maximum - logical_minimum)
 203 * resolution = ----------------------------------------------------------
 204 *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 205 *
 206 * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 207 *
 208 * Only exponent 1 length units are processed. Centimeters and inches are
 209 * converted to millimeters. Degrees are converted to radians.
 210 */
 211__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 212{
 213        __s32 unit_exponent = field->unit_exponent;
 214        __s32 logical_extents = field->logical_maximum -
 215                                        field->logical_minimum;
 216        __s32 physical_extents = field->physical_maximum -
 217                                        field->physical_minimum;
 218        __s32 prev;
 219
 220        /* Check if the extents are sane */
 221        if (logical_extents <= 0 || physical_extents <= 0)
 222                return 0;
 223
 224        /*
 225         * Verify and convert units.
 226         * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 227         */
 228        switch (code) {
 229        case ABS_X:
 230        case ABS_Y:
 231        case ABS_Z:
 232        case ABS_MT_POSITION_X:
 233        case ABS_MT_POSITION_Y:
 234        case ABS_MT_TOOL_X:
 235        case ABS_MT_TOOL_Y:
 236        case ABS_MT_TOUCH_MAJOR:
 237        case ABS_MT_TOUCH_MINOR:
 238                if (field->unit == 0x11) {              /* If centimeters */
 239                        /* Convert to millimeters */
 240                        unit_exponent += 1;
 241                } else if (field->unit == 0x13) {       /* If inches */
 242                        /* Convert to millimeters */
 243                        prev = physical_extents;
 244                        physical_extents *= 254;
 245                        if (physical_extents < prev)
 246                                return 0;
 247                        unit_exponent -= 1;
 248                } else {
 249                        return 0;
 250                }
 251                break;
 252
 253        case ABS_RX:
 254        case ABS_RY:
 255        case ABS_RZ:
 256        case ABS_TILT_X:
 257        case ABS_TILT_Y:
 258                if (field->unit == 0x14) {              /* If degrees */
 259                        /* Convert to radians */
 260                        prev = logical_extents;
 261                        logical_extents *= 573;
 262                        if (logical_extents < prev)
 263                                return 0;
 264                        unit_exponent += 1;
 265                } else if (field->unit != 0x12) {       /* If not radians */
 266                        return 0;
 267                }
 268                break;
 269
 270        default:
 271                return 0;
 272        }
 273
 274        /* Apply negative unit exponent */
 275        for (; unit_exponent < 0; unit_exponent++) {
 276                prev = logical_extents;
 277                logical_extents *= 10;
 278                if (logical_extents < prev)
 279                        return 0;
 280        }
 281        /* Apply positive unit exponent */
 282        for (; unit_exponent > 0; unit_exponent--) {
 283                prev = physical_extents;
 284                physical_extents *= 10;
 285                if (physical_extents < prev)
 286                        return 0;
 287        }
 288
 289        /* Calculate resolution */
 290        return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 291}
 292EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 293
 294#ifdef CONFIG_HID_BATTERY_STRENGTH
 295static enum power_supply_property hidinput_battery_props[] = {
 296        POWER_SUPPLY_PROP_PRESENT,
 297        POWER_SUPPLY_PROP_ONLINE,
 298        POWER_SUPPLY_PROP_CAPACITY,
 299        POWER_SUPPLY_PROP_MODEL_NAME,
 300        POWER_SUPPLY_PROP_STATUS,
 301        POWER_SUPPLY_PROP_SCOPE,
 302};
 303
 304#define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 305#define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 306
 307static const struct hid_device_id hid_battery_quirks[] = {
 308        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 309                        USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 310        HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 311        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 312                               USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 313          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 314        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 315                               USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 316          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 317        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 318                USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 319          HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 320        {}
 321};
 322
 323static unsigned find_battery_quirk(struct hid_device *hdev)
 324{
 325        unsigned quirks = 0;
 326        const struct hid_device_id *match;
 327
 328        match = hid_match_id(hdev, hid_battery_quirks);
 329        if (match != NULL)
 330                quirks = match->driver_data;
 331
 332        return quirks;
 333}
 334
 335static int hidinput_get_battery_property(struct power_supply *psy,
 336                                         enum power_supply_property prop,
 337                                         union power_supply_propval *val)
 338{
 339        struct hid_device *dev = container_of(psy, struct hid_device, battery);
 340        int ret = 0;
 341        __u8 *buf;
 342
 343        switch (prop) {
 344        case POWER_SUPPLY_PROP_PRESENT:
 345        case POWER_SUPPLY_PROP_ONLINE:
 346                val->intval = 1;
 347                break;
 348
 349        case POWER_SUPPLY_PROP_CAPACITY:
 350
 351                buf = kmalloc(2 * sizeof(__u8), GFP_KERNEL);
 352                if (!buf) {
 353                        ret = -ENOMEM;
 354                        break;
 355                }
 356                ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 2,
 357                                         dev->battery_report_type,
 358                                         HID_REQ_GET_REPORT);
 359
 360                if (ret != 2) {
 361                        ret = -ENODATA;
 362                        kfree(buf);
 363                        break;
 364                }
 365                ret = 0;
 366
 367                if (dev->battery_min < dev->battery_max &&
 368                    buf[1] >= dev->battery_min &&
 369                    buf[1] <= dev->battery_max)
 370                        val->intval = (100 * (buf[1] - dev->battery_min)) /
 371                                (dev->battery_max - dev->battery_min);
 372                kfree(buf);
 373                break;
 374
 375        case POWER_SUPPLY_PROP_MODEL_NAME:
 376                val->strval = dev->name;
 377                break;
 378
 379        case POWER_SUPPLY_PROP_STATUS:
 380                val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
 381                break;
 382
 383        case POWER_SUPPLY_PROP_SCOPE:
 384                val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 385                break;
 386
 387        default:
 388                ret = -EINVAL;
 389                break;
 390        }
 391
 392        return ret;
 393}
 394
 395static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 396{
 397        struct power_supply *battery = &dev->battery;
 398        int ret;
 399        unsigned quirks;
 400        s32 min, max;
 401
 402        if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
 403                return false;   /* no match */
 404
 405        if (battery->name != NULL)
 406                goto out;       /* already initialized? */
 407
 408        battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
 409        if (battery->name == NULL)
 410                goto out;
 411
 412        battery->type = POWER_SUPPLY_TYPE_BATTERY;
 413        battery->properties = hidinput_battery_props;
 414        battery->num_properties = ARRAY_SIZE(hidinput_battery_props);
 415        battery->use_for_apm = 0;
 416        battery->get_property = hidinput_get_battery_property;
 417
 418        quirks = find_battery_quirk(dev);
 419
 420        hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 421                dev->bus, dev->vendor, dev->product, dev->version, quirks);
 422
 423        min = field->logical_minimum;
 424        max = field->logical_maximum;
 425
 426        if (quirks & HID_BATTERY_QUIRK_PERCENT) {
 427                min = 0;
 428                max = 100;
 429        }
 430
 431        if (quirks & HID_BATTERY_QUIRK_FEATURE)
 432                report_type = HID_FEATURE_REPORT;
 433
 434        dev->battery_min = min;
 435        dev->battery_max = max;
 436        dev->battery_report_type = report_type;
 437        dev->battery_report_id = field->report->id;
 438
 439        ret = power_supply_register(&dev->dev, battery);
 440        if (ret != 0) {
 441                hid_warn(dev, "can't register power supply: %d\n", ret);
 442                kfree(battery->name);
 443                battery->name = NULL;
 444        }
 445
 446        power_supply_powers(battery, &dev->dev);
 447
 448out:
 449        return true;
 450}
 451
 452static void hidinput_cleanup_battery(struct hid_device *dev)
 453{
 454        if (!dev->battery.name)
 455                return;
 456
 457        power_supply_unregister(&dev->battery);
 458        kfree(dev->battery.name);
 459        dev->battery.name = NULL;
 460}
 461#else  /* !CONFIG_HID_BATTERY_STRENGTH */
 462static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 463                                   struct hid_field *field)
 464{
 465        return false;
 466}
 467
 468static void hidinput_cleanup_battery(struct hid_device *dev)
 469{
 470}
 471#endif  /* CONFIG_HID_BATTERY_STRENGTH */
 472
 473static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 474                                     struct hid_usage *usage)
 475{
 476        struct input_dev *input = hidinput->input;
 477        struct hid_device *device = input_get_drvdata(input);
 478        int max = 0, code;
 479        unsigned long *bit = NULL;
 480
 481        field->hidinput = hidinput;
 482
 483        if (field->flags & HID_MAIN_ITEM_CONSTANT)
 484                goto ignore;
 485
 486        /* Ignore if report count is out of bounds. */
 487        if (field->report_count < 1)
 488                goto ignore;
 489
 490        /* only LED usages are supported in output fields */
 491        if (field->report_type == HID_OUTPUT_REPORT &&
 492                        (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 493                goto ignore;
 494        }
 495
 496        if (device->driver->input_mapping) {
 497                int ret = device->driver->input_mapping(device, hidinput, field,
 498                                usage, &bit, &max);
 499                if (ret > 0)
 500                        goto mapped;
 501                if (ret < 0)
 502                        goto ignore;
 503        }
 504
 505        switch (usage->hid & HID_USAGE_PAGE) {
 506        case HID_UP_UNDEFINED:
 507                goto ignore;
 508
 509        case HID_UP_KEYBOARD:
 510                set_bit(EV_REP, input->evbit);
 511
 512                if ((usage->hid & HID_USAGE) < 256) {
 513                        if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 514                        map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 515                } else
 516                        map_key(KEY_UNKNOWN);
 517
 518                break;
 519
 520        case HID_UP_BUTTON:
 521                code = ((usage->hid - 1) & HID_USAGE);
 522
 523                switch (field->application) {
 524                case HID_GD_MOUSE:
 525                case HID_GD_POINTER:  code += BTN_MOUSE; break;
 526                case HID_GD_JOYSTICK:
 527                                if (code <= 0xf)
 528                                        code += BTN_JOYSTICK;
 529                                else
 530                                        code += BTN_TRIGGER_HAPPY - 0x10;
 531                                break;
 532                case HID_GD_GAMEPAD:
 533                                if (code <= 0xf)
 534                                        code += BTN_GAMEPAD;
 535                                else
 536                                        code += BTN_TRIGGER_HAPPY - 0x10;
 537                                break;
 538                default:
 539                        switch (field->physical) {
 540                        case HID_GD_MOUSE:
 541                        case HID_GD_POINTER:  code += BTN_MOUSE; break;
 542                        case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 543                        case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 544                        default:              code += BTN_MISC;
 545                        }
 546                }
 547
 548                map_key(code);
 549                break;
 550
 551        case HID_UP_SIMULATION:
 552                switch (usage->hid & 0xffff) {
 553                case 0xba: map_abs(ABS_RUDDER);   break;
 554                case 0xbb: map_abs(ABS_THROTTLE); break;
 555                case 0xc4: map_abs(ABS_GAS);      break;
 556                case 0xc5: map_abs(ABS_BRAKE);    break;
 557                case 0xc8: map_abs(ABS_WHEEL);    break;
 558                default:   goto ignore;
 559                }
 560                break;
 561
 562        case HID_UP_GENDESK:
 563                if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 564                        switch (usage->hid & 0xf) {
 565                        case 0x1: map_key_clear(KEY_POWER);  break;
 566                        case 0x2: map_key_clear(KEY_SLEEP);  break;
 567                        case 0x3: map_key_clear(KEY_WAKEUP); break;
 568                        case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 569                        case 0x5: map_key_clear(KEY_MENU); break;
 570                        case 0x6: map_key_clear(KEY_PROG1); break;
 571                        case 0x7: map_key_clear(KEY_HELP); break;
 572                        case 0x8: map_key_clear(KEY_EXIT); break;
 573                        case 0x9: map_key_clear(KEY_SELECT); break;
 574                        case 0xa: map_key_clear(KEY_RIGHT); break;
 575                        case 0xb: map_key_clear(KEY_LEFT); break;
 576                        case 0xc: map_key_clear(KEY_UP); break;
 577                        case 0xd: map_key_clear(KEY_DOWN); break;
 578                        case 0xe: map_key_clear(KEY_POWER2); break;
 579                        case 0xf: map_key_clear(KEY_RESTART); break;
 580                        default: goto unknown;
 581                        }
 582                        break;
 583                }
 584
 585                if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 586                        switch (usage->hid) {
 587                        case HID_GD_UP:    usage->hat_dir = 1; break;
 588                        case HID_GD_DOWN:  usage->hat_dir = 5; break;
 589                        case HID_GD_RIGHT: usage->hat_dir = 3; break;
 590                        case HID_GD_LEFT:  usage->hat_dir = 7; break;
 591                        default: goto unknown;
 592                        }
 593                        if (field->dpad) {
 594                                map_abs(field->dpad);
 595                                goto ignore;
 596                        }
 597                        map_abs(ABS_HAT0X);
 598                        break;
 599                }
 600
 601                switch (usage->hid) {
 602                /* These usage IDs map directly to the usage codes. */
 603                case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 604                case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 605                        if (field->flags & HID_MAIN_ITEM_RELATIVE)
 606                                map_rel(usage->hid & 0xf);
 607                        else
 608                                map_abs_clear(usage->hid & 0xf);
 609                        break;
 610
 611                case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 612                        if (field->flags & HID_MAIN_ITEM_RELATIVE)
 613                                map_rel(usage->hid & 0xf);
 614                        else
 615                                map_abs(usage->hid & 0xf);
 616                        break;
 617
 618                case HID_GD_HATSWITCH:
 619                        usage->hat_min = field->logical_minimum;
 620                        usage->hat_max = field->logical_maximum;
 621                        map_abs(ABS_HAT0X);
 622                        break;
 623
 624                case HID_GD_START:      map_key_clear(BTN_START);       break;
 625                case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 626
 627                default: goto unknown;
 628                }
 629
 630                break;
 631
 632        case HID_UP_LED:
 633                switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 634                case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 635                case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 636                case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 637                case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 638                case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 639                case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 640                case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 641                case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 642                case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 643                case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 644                case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 645
 646                default: goto ignore;
 647                }
 648                break;
 649
 650        case HID_UP_DIGITIZER:
 651                switch (usage->hid & 0xff) {
 652                case 0x00: /* Undefined */
 653                        goto ignore;
 654
 655                case 0x30: /* TipPressure */
 656                        if (!test_bit(BTN_TOUCH, input->keybit)) {
 657                                device->quirks |= HID_QUIRK_NOTOUCH;
 658                                set_bit(EV_KEY, input->evbit);
 659                                set_bit(BTN_TOUCH, input->keybit);
 660                        }
 661                        map_abs_clear(ABS_PRESSURE);
 662                        break;
 663
 664                case 0x32: /* InRange */
 665                        switch (field->physical & 0xff) {
 666                        case 0x21: map_key(BTN_TOOL_MOUSE); break;
 667                        case 0x22: map_key(BTN_TOOL_FINGER); break;
 668                        default: map_key(BTN_TOOL_PEN); break;
 669                        }
 670                        break;
 671
 672                case 0x3c: /* Invert */
 673                        map_key_clear(BTN_TOOL_RUBBER);
 674                        break;
 675
 676                case 0x3d: /* X Tilt */
 677                        map_abs_clear(ABS_TILT_X);
 678                        break;
 679
 680                case 0x3e: /* Y Tilt */
 681                        map_abs_clear(ABS_TILT_Y);
 682                        break;
 683
 684                case 0x33: /* Touch */
 685                case 0x42: /* TipSwitch */
 686                case 0x43: /* TipSwitch2 */
 687                        device->quirks &= ~HID_QUIRK_NOTOUCH;
 688                        map_key_clear(BTN_TOUCH);
 689                        break;
 690
 691                case 0x44: /* BarrelSwitch */
 692                        map_key_clear(BTN_STYLUS);
 693                        break;
 694
 695                case 0x46: /* TabletPick */
 696                case 0x5a: /* SecondaryBarrelSwitch */
 697                        map_key_clear(BTN_STYLUS2);
 698                        break;
 699
 700                case 0x5b: /* TransducerSerialNumber */
 701                        usage->type = EV_MSC;
 702                        usage->code = MSC_SERIAL;
 703                        bit = input->mscbit;
 704                        max = MSC_MAX;
 705                        break;
 706
 707                default:  goto unknown;
 708                }
 709                break;
 710
 711        case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
 712                switch (usage->hid & HID_USAGE) {
 713                case 0x000: goto ignore;
 714                case 0x030: map_key_clear(KEY_POWER);           break;
 715                case 0x031: map_key_clear(KEY_RESTART);         break;
 716                case 0x032: map_key_clear(KEY_SLEEP);           break;
 717                case 0x034: map_key_clear(KEY_SLEEP);           break;
 718                case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
 719                case 0x036: map_key_clear(BTN_MISC);            break;
 720
 721                case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
 722                case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
 723                case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
 724                case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
 725                case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
 726                case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
 727                case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
 728                case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
 729                case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
 730
 731                case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
 732                case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
 733                case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
 734                case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
 735                case 0x069: map_key_clear(KEY_RED);             break;
 736                case 0x06a: map_key_clear(KEY_GREEN);           break;
 737                case 0x06b: map_key_clear(KEY_BLUE);            break;
 738                case 0x06c: map_key_clear(KEY_YELLOW);          break;
 739                case 0x06d: map_key_clear(KEY_ZOOM);            break;
 740
 741                case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
 742                case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
 743                case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
 744                case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
 745                case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
 746                case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
 747
 748                case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
 749                case 0x083: map_key_clear(KEY_LAST);            break;
 750                case 0x084: map_key_clear(KEY_ENTER);           break;
 751                case 0x088: map_key_clear(KEY_PC);              break;
 752                case 0x089: map_key_clear(KEY_TV);              break;
 753                case 0x08a: map_key_clear(KEY_WWW);             break;
 754                case 0x08b: map_key_clear(KEY_DVD);             break;
 755                case 0x08c: map_key_clear(KEY_PHONE);           break;
 756                case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 757                case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 758                case 0x08f: map_key_clear(KEY_GAMES);           break;
 759                case 0x090: map_key_clear(KEY_MEMO);            break;
 760                case 0x091: map_key_clear(KEY_CD);              break;
 761                case 0x092: map_key_clear(KEY_VCR);             break;
 762                case 0x093: map_key_clear(KEY_TUNER);           break;
 763                case 0x094: map_key_clear(KEY_EXIT);            break;
 764                case 0x095: map_key_clear(KEY_HELP);            break;
 765                case 0x096: map_key_clear(KEY_TAPE);            break;
 766                case 0x097: map_key_clear(KEY_TV2);             break;
 767                case 0x098: map_key_clear(KEY_SAT);             break;
 768                case 0x09a: map_key_clear(KEY_PVR);             break;
 769
 770                case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 771                case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 772                case 0x0a0: map_key_clear(KEY_VCR2);            break;
 773
 774                case 0x0b0: map_key_clear(KEY_PLAY);            break;
 775                case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 776                case 0x0b2: map_key_clear(KEY_RECORD);          break;
 777                case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 778                case 0x0b4: map_key_clear(KEY_REWIND);          break;
 779                case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 780                case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 781                case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 782                case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 783                case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
 784                case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
 785                case 0x0bf: map_key_clear(KEY_SLOW);            break;
 786
 787                case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 788                case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
 789                case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 790                case 0x0e2: map_key_clear(KEY_MUTE);            break;
 791                case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 792                case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 793                case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 794                case 0x0f5: map_key_clear(KEY_SLOW);            break;
 795
 796                case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
 797                case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 798                case 0x183: map_key_clear(KEY_CONFIG);          break;
 799                case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 800                case 0x185: map_key_clear(KEY_EDITOR);          break;
 801                case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 802                case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 803                case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 804                case 0x189: map_key_clear(KEY_DATABASE);        break;
 805                case 0x18a: map_key_clear(KEY_MAIL);            break;
 806                case 0x18b: map_key_clear(KEY_NEWS);            break;
 807                case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 808                case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 809                case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 810                case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
 811                case 0x190: map_key_clear(KEY_JOURNAL);         break;
 812                case 0x191: map_key_clear(KEY_FINANCE);         break;
 813                case 0x192: map_key_clear(KEY_CALC);            break;
 814                case 0x193: map_key_clear(KEY_PLAYER);          break;
 815                case 0x194: map_key_clear(KEY_FILE);            break;
 816                case 0x196: map_key_clear(KEY_WWW);             break;
 817                case 0x199: map_key_clear(KEY_CHAT);            break;
 818                case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 819                case 0x19e: map_key_clear(KEY_COFFEE);          break;
 820                case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
 821                case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
 822                case 0x1a3: map_key_clear(KEY_NEXT);            break;
 823                case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
 824                case 0x1a6: map_key_clear(KEY_HELP);            break;
 825                case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 826                case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 827                case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
 828                case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
 829                case 0x1b4: map_key_clear(KEY_FILE);            break;
 830                case 0x1b6: map_key_clear(KEY_IMAGES);          break;
 831                case 0x1b7: map_key_clear(KEY_AUDIO);           break;
 832                case 0x1b8: map_key_clear(KEY_VIDEO);           break;
 833                case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 834                case 0x1bd: map_key_clear(KEY_INFO);            break;
 835                case 0x201: map_key_clear(KEY_NEW);             break;
 836                case 0x202: map_key_clear(KEY_OPEN);            break;
 837                case 0x203: map_key_clear(KEY_CLOSE);           break;
 838                case 0x204: map_key_clear(KEY_EXIT);            break;
 839                case 0x207: map_key_clear(KEY_SAVE);            break;
 840                case 0x208: map_key_clear(KEY_PRINT);           break;
 841                case 0x209: map_key_clear(KEY_PROPS);           break;
 842                case 0x21a: map_key_clear(KEY_UNDO);            break;
 843                case 0x21b: map_key_clear(KEY_COPY);            break;
 844                case 0x21c: map_key_clear(KEY_CUT);             break;
 845                case 0x21d: map_key_clear(KEY_PASTE);           break;
 846                case 0x21f: map_key_clear(KEY_FIND);            break;
 847                case 0x221: map_key_clear(KEY_SEARCH);          break;
 848                case 0x222: map_key_clear(KEY_GOTO);            break;
 849                case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 850                case 0x224: map_key_clear(KEY_BACK);            break;
 851                case 0x225: map_key_clear(KEY_FORWARD);         break;
 852                case 0x226: map_key_clear(KEY_STOP);            break;
 853                case 0x227: map_key_clear(KEY_REFRESH);         break;
 854                case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 855                case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
 856                case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
 857                case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
 858                case 0x233: map_key_clear(KEY_SCROLLUP);        break;
 859                case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
 860                case 0x238: map_rel(REL_HWHEEL);                break;
 861                case 0x23d: map_key_clear(KEY_EDIT);            break;
 862                case 0x25f: map_key_clear(KEY_CANCEL);          break;
 863                case 0x269: map_key_clear(KEY_INSERT);          break;
 864                case 0x26a: map_key_clear(KEY_DELETE);          break;
 865                case 0x279: map_key_clear(KEY_REDO);            break;
 866
 867                case 0x289: map_key_clear(KEY_REPLY);           break;
 868                case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
 869                case 0x28c: map_key_clear(KEY_SEND);            break;
 870
 871                case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
 872                case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
 873                case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
 874                case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
 875                case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
 876                case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
 877
 878                default: map_key_clear(KEY_UNKNOWN);
 879                }
 880                break;
 881
 882        case HID_UP_GENDEVCTRLS:
 883                if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
 884                        goto ignore;
 885                else
 886                        goto unknown;
 887                break;
 888
 889        case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 890                set_bit(EV_REP, input->evbit);
 891                switch (usage->hid & HID_USAGE) {
 892                case 0x021: map_key_clear(KEY_PRINT);           break;
 893                case 0x070: map_key_clear(KEY_HP);              break;
 894                case 0x071: map_key_clear(KEY_CAMERA);          break;
 895                case 0x072: map_key_clear(KEY_SOUND);           break;
 896                case 0x073: map_key_clear(KEY_QUESTION);        break;
 897                case 0x080: map_key_clear(KEY_EMAIL);           break;
 898                case 0x081: map_key_clear(KEY_CHAT);            break;
 899                case 0x082: map_key_clear(KEY_SEARCH);          break;
 900                case 0x083: map_key_clear(KEY_CONNECT);         break;
 901                case 0x084: map_key_clear(KEY_FINANCE);         break;
 902                case 0x085: map_key_clear(KEY_SPORT);           break;
 903                case 0x086: map_key_clear(KEY_SHOP);            break;
 904                default:    goto ignore;
 905                }
 906                break;
 907
 908        case HID_UP_HPVENDOR2:
 909                set_bit(EV_REP, input->evbit);
 910                switch (usage->hid & HID_USAGE) {
 911                case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
 912                case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
 913                default:    goto ignore;
 914                }
 915                break;
 916
 917        case HID_UP_MSVENDOR:
 918                goto ignore;
 919
 920        case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
 921                set_bit(EV_REP, input->evbit);
 922                goto ignore;
 923
 924        case HID_UP_LOGIVENDOR:
 925                goto ignore;
 926
 927        case HID_UP_PID:
 928                switch (usage->hid & HID_USAGE) {
 929                case 0xa4: map_key_clear(BTN_DEAD);     break;
 930                default: goto ignore;
 931                }
 932                break;
 933
 934        default:
 935        unknown:
 936                if (field->report_size == 1) {
 937                        if (field->report->type == HID_OUTPUT_REPORT) {
 938                                map_led(LED_MISC);
 939                                break;
 940                        }
 941                        map_key(BTN_MISC);
 942                        break;
 943                }
 944                if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 945                        map_rel(REL_MISC);
 946                        break;
 947                }
 948                map_abs(ABS_MISC);
 949                break;
 950        }
 951
 952mapped:
 953        if (device->driver->input_mapped && device->driver->input_mapped(device,
 954                                hidinput, field, usage, &bit, &max) < 0)
 955                goto ignore;
 956
 957        set_bit(usage->type, input->evbit);
 958
 959        while (usage->code <= max && test_and_set_bit(usage->code, bit))
 960                usage->code = find_next_zero_bit(bit, max + 1, usage->code);
 961
 962        if (usage->code > max)
 963                goto ignore;
 964
 965
 966        if (usage->type == EV_ABS) {
 967
 968                int a = field->logical_minimum;
 969                int b = field->logical_maximum;
 970
 971                if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
 972                        a = field->logical_minimum = 0;
 973                        b = field->logical_maximum = 255;
 974                }
 975
 976                if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
 977                        input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
 978                else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 979
 980                input_abs_set_res(input, usage->code,
 981                                  hidinput_calc_abs_res(field, usage->code));
 982
 983                /* use a larger default input buffer for MT devices */
 984                if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
 985                        input_set_events_per_packet(input, 60);
 986        }
 987
 988        if (usage->type == EV_ABS &&
 989            (usage->hat_min < usage->hat_max || usage->hat_dir)) {
 990                int i;
 991                for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
 992                        input_set_abs_params(input, i, -1, 1, 0, 0);
 993                        set_bit(i, input->absbit);
 994                }
 995                if (usage->hat_dir && !field->dpad)
 996                        field->dpad = usage->code;
 997        }
 998
 999        /* for those devices which produce Consumer volume usage as relative,
1000         * we emulate pressing volumeup/volumedown appropriate number of times
1001         * in hidinput_hid_event()
1002         */
1003        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1004                        (usage->code == ABS_VOLUME)) {
1005                set_bit(KEY_VOLUMEUP, input->keybit);
1006                set_bit(KEY_VOLUMEDOWN, input->keybit);
1007        }
1008
1009        if (usage->type == EV_KEY) {
1010                set_bit(EV_MSC, input->evbit);
1011                set_bit(MSC_SCAN, input->mscbit);
1012        }
1013
1014ignore:
1015        return;
1016
1017}
1018
1019void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1020{
1021        struct input_dev *input;
1022        unsigned *quirks = &hid->quirks;
1023
1024        if (!field->hidinput)
1025                return;
1026
1027        input = field->hidinput->input;
1028
1029        if (!usage->type)
1030                return;
1031
1032        if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1033                int hat_dir = usage->hat_dir;
1034                if (!hat_dir)
1035                        hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1036                if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1037                input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1038                input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1039                return;
1040        }
1041
1042        if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
1043                *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
1044                return;
1045        }
1046
1047        if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
1048                if (value) {
1049                        input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
1050                        return;
1051                }
1052                input_event(input, usage->type, usage->code, 0);
1053                input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
1054                return;
1055        }
1056
1057        if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
1058                int a = field->logical_minimum;
1059                int b = field->logical_maximum;
1060                input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
1061        }
1062
1063        if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
1064                dbg_hid("Maximum Effects - %d\n",value);
1065                return;
1066        }
1067
1068        if (usage->hid == (HID_UP_PID | 0x7fUL)) {
1069                dbg_hid("PID Pool Report\n");
1070                return;
1071        }
1072
1073        if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1074                return;
1075
1076        if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1077                        (usage->code == ABS_VOLUME)) {
1078                int count = abs(value);
1079                int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1080                int i;
1081
1082                for (i = 0; i < count; i++) {
1083                        input_event(input, EV_KEY, direction, 1);
1084                        input_sync(input);
1085                        input_event(input, EV_KEY, direction, 0);
1086                        input_sync(input);
1087                }
1088                return;
1089        }
1090
1091        /*
1092         * Ignore out-of-range values as per HID specification,
1093         * section 5.10 and 6.2.25.
1094         *
1095         * The logical_minimum < logical_maximum check is done so that we
1096         * don't unintentionally discard values sent by devices which
1097         * don't specify logical min and max.
1098         */
1099        if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1100            (field->logical_minimum < field->logical_maximum) &&
1101            (value < field->logical_minimum ||
1102             value > field->logical_maximum)) {
1103                dbg_hid("Ignoring out-of-range value %x\n", value);
1104                return;
1105        }
1106
1107        /* report the usage code as scancode if the key status has changed */
1108        if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
1109                input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1110
1111        input_event(input, usage->type, usage->code, value);
1112
1113        if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
1114                input_event(input, usage->type, usage->code, 0);
1115}
1116
1117void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1118{
1119        struct hid_input *hidinput;
1120
1121        if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1122                return;
1123
1124        list_for_each_entry(hidinput, &hid->inputs, list)
1125                input_sync(hidinput->input);
1126}
1127EXPORT_SYMBOL_GPL(hidinput_report_event);
1128
1129int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
1130{
1131        struct hid_report *report;
1132        int i, j;
1133
1134        list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1135                for (i = 0; i < report->maxfield; i++) {
1136                        *field = report->field[i];
1137                        for (j = 0; j < (*field)->maxusage; j++)
1138                                if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1139                                        return j;
1140                }
1141        }
1142        return -1;
1143}
1144EXPORT_SYMBOL_GPL(hidinput_find_field);
1145
1146struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1147{
1148        struct hid_report *report;
1149        struct hid_field *field;
1150        int i, j;
1151
1152        list_for_each_entry(report,
1153                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1154                            list) {
1155                for (i = 0; i < report->maxfield; i++) {
1156                        field = report->field[i];
1157                        for (j = 0; j < field->maxusage; j++)
1158                                if (field->usage[j].type == EV_LED)
1159                                        return field;
1160                }
1161        }
1162        return NULL;
1163}
1164EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1165
1166unsigned int hidinput_count_leds(struct hid_device *hid)
1167{
1168        struct hid_report *report;
1169        struct hid_field *field;
1170        int i, j;
1171        unsigned int count = 0;
1172
1173        list_for_each_entry(report,
1174                            &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1175                            list) {
1176                for (i = 0; i < report->maxfield; i++) {
1177                        field = report->field[i];
1178                        for (j = 0; j < field->maxusage; j++)
1179                                if (field->usage[j].type == EV_LED &&
1180                                    field->value[j])
1181                                        count += 1;
1182                }
1183        }
1184        return count;
1185}
1186EXPORT_SYMBOL_GPL(hidinput_count_leds);
1187
1188static void hidinput_led_worker(struct work_struct *work)
1189{
1190        struct hid_device *hid = container_of(work, struct hid_device,
1191                                              led_work);
1192        struct hid_field *field;
1193        struct hid_report *report;
1194        int len, ret;
1195        __u8 *buf;
1196
1197        field = hidinput_get_led_field(hid);
1198        if (!field)
1199                return;
1200
1201        /*
1202         * field->report is accessed unlocked regarding HID core. So there might
1203         * be another incoming SET-LED request from user-space, which changes
1204         * the LED state while we assemble our outgoing buffer. However, this
1205         * doesn't matter as hid_output_report() correctly converts it into a
1206         * boolean value no matter what information is currently set on the LED
1207         * field (even garbage). So the remote device will always get a valid
1208         * request.
1209         * And in case we send a wrong value, a next led worker is spawned
1210         * for every SET-LED request so the following worker will send the
1211         * correct value, guaranteed!
1212         */
1213
1214        report = field->report;
1215
1216        /* use custom SET_REPORT request if possible (asynchronous) */
1217        if (hid->ll_driver->request)
1218                return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1219
1220        /* fall back to generic raw-output-report */
1221        len = hid_report_len(report);
1222        buf = hid_alloc_report_buf(report, GFP_KERNEL);
1223        if (!buf)
1224                return;
1225
1226        hid_output_report(report, buf);
1227        /* synchronous output report */
1228        ret = hid_hw_output_report(hid, buf, len);
1229        if (ret == -ENOSYS)
1230                hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1231                                HID_REQ_SET_REPORT);
1232        kfree(buf);
1233}
1234
1235static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1236                                unsigned int code, int value)
1237{
1238        struct hid_device *hid = input_get_drvdata(dev);
1239        struct hid_field *field;
1240        int offset;
1241
1242        if (type == EV_FF)
1243                return input_ff_event(dev, type, code, value);
1244
1245        if (type != EV_LED)
1246                return -1;
1247
1248        if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1249                hid_warn(dev, "event field not found\n");
1250                return -1;
1251        }
1252
1253        hid_set_field(field, offset, value);
1254
1255        schedule_work(&hid->led_work);
1256        return 0;
1257}
1258
1259static int hidinput_open(struct input_dev *dev)
1260{
1261        struct hid_device *hid = input_get_drvdata(dev);
1262
1263        return hid_hw_open(hid);
1264}
1265
1266static void hidinput_close(struct input_dev *dev)
1267{
1268        struct hid_device *hid = input_get_drvdata(dev);
1269
1270        hid_hw_close(hid);
1271}
1272
1273static void report_features(struct hid_device *hid)
1274{
1275        struct hid_driver *drv = hid->driver;
1276        struct hid_report_enum *rep_enum;
1277        struct hid_report *rep;
1278        int i, j;
1279
1280        rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1281        list_for_each_entry(rep, &rep_enum->report_list, list)
1282                for (i = 0; i < rep->maxfield; i++) {
1283                        /* Ignore if report count is out of bounds. */
1284                        if (rep->field[i]->report_count < 1)
1285                                continue;
1286
1287                        for (j = 0; j < rep->field[i]->maxusage; j++) {
1288                                /* Verify if Battery Strength feature is available */
1289                                hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
1290
1291                                if (drv->feature_mapping)
1292                                        drv->feature_mapping(hid, rep->field[i],
1293                                                             rep->field[i]->usage + j);
1294                        }
1295                }
1296}
1297
1298static struct hid_input *hidinput_allocate(struct hid_device *hid)
1299{
1300        struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1301        struct input_dev *input_dev = input_allocate_device();
1302        if (!hidinput || !input_dev) {
1303                kfree(hidinput);
1304                input_free_device(input_dev);
1305                hid_err(hid, "Out of memory during hid input probe\n");
1306                return NULL;
1307        }
1308
1309        input_set_drvdata(input_dev, hid);
1310        input_dev->event = hidinput_input_event;
1311        input_dev->open = hidinput_open;
1312        input_dev->close = hidinput_close;
1313        input_dev->setkeycode = hidinput_setkeycode;
1314        input_dev->getkeycode = hidinput_getkeycode;
1315
1316        input_dev->name = hid->name;
1317        input_dev->phys = hid->phys;
1318        input_dev->uniq = hid->uniq;
1319        input_dev->id.bustype = hid->bus;
1320        input_dev->id.vendor  = hid->vendor;
1321        input_dev->id.product = hid->product;
1322        input_dev->id.version = hid->version;
1323        input_dev->dev.parent = &hid->dev;
1324        hidinput->input = input_dev;
1325        list_add_tail(&hidinput->list, &hid->inputs);
1326
1327        return hidinput;
1328}
1329
1330static bool hidinput_has_been_populated(struct hid_input *hidinput)
1331{
1332        int i;
1333        unsigned long r = 0;
1334
1335        for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
1336                r |= hidinput->input->evbit[i];
1337
1338        for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
1339                r |= hidinput->input->keybit[i];
1340
1341        for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
1342                r |= hidinput->input->relbit[i];
1343
1344        for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
1345                r |= hidinput->input->absbit[i];
1346
1347        for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
1348                r |= hidinput->input->mscbit[i];
1349
1350        for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
1351                r |= hidinput->input->ledbit[i];
1352
1353        for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
1354                r |= hidinput->input->sndbit[i];
1355
1356        for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
1357                r |= hidinput->input->ffbit[i];
1358
1359        for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
1360                r |= hidinput->input->swbit[i];
1361
1362        return !!r;
1363}
1364
1365static void hidinput_cleanup_hidinput(struct hid_device *hid,
1366                struct hid_input *hidinput)
1367{
1368        struct hid_report *report;
1369        int i, k;
1370
1371        list_del(&hidinput->list);
1372        input_free_device(hidinput->input);
1373
1374        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1375                if (k == HID_OUTPUT_REPORT &&
1376                        hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1377                        continue;
1378
1379                list_for_each_entry(report, &hid->report_enum[k].report_list,
1380                                    list) {
1381
1382                        for (i = 0; i < report->maxfield; i++)
1383                                if (report->field[i]->hidinput == hidinput)
1384                                        report->field[i]->hidinput = NULL;
1385                }
1386        }
1387
1388        kfree(hidinput);
1389}
1390
1391/*
1392 * Register the input device; print a message.
1393 * Configure the input layer interface
1394 * Read all reports and initialize the absolute field values.
1395 */
1396
1397int hidinput_connect(struct hid_device *hid, unsigned int force)
1398{
1399        struct hid_driver *drv = hid->driver;
1400        struct hid_report *report;
1401        struct hid_input *hidinput = NULL;
1402        int i, j, k;
1403
1404        INIT_LIST_HEAD(&hid->inputs);
1405        INIT_WORK(&hid->led_work, hidinput_led_worker);
1406
1407        if (!force) {
1408                for (i = 0; i < hid->maxcollection; i++) {
1409                        struct hid_collection *col = &hid->collection[i];
1410                        if (col->type == HID_COLLECTION_APPLICATION ||
1411                                        col->type == HID_COLLECTION_PHYSICAL)
1412                                if (IS_INPUT_APPLICATION(col->usage))
1413                                        break;
1414                }
1415
1416                if (i == hid->maxcollection)
1417                        return -1;
1418        }
1419
1420        report_features(hid);
1421
1422        for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
1423                if (k == HID_OUTPUT_REPORT &&
1424                        hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
1425                        continue;
1426
1427                list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1428
1429                        if (!report->maxfield)
1430                                continue;
1431
1432                        if (!hidinput) {
1433                                hidinput = hidinput_allocate(hid);
1434                                if (!hidinput)
1435                                        goto out_unwind;
1436                        }
1437
1438                        for (i = 0; i < report->maxfield; i++)
1439                                for (j = 0; j < report->field[i]->maxusage; j++)
1440                                        hidinput_configure_usage(hidinput, report->field[i],
1441                                                                 report->field[i]->usage + j);
1442
1443                        if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1444                            !hidinput_has_been_populated(hidinput))
1445                                continue;
1446
1447                        if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1448                                /* This will leave hidinput NULL, so that it
1449                                 * allocates another one if we have more inputs on
1450                                 * the same interface. Some devices (e.g. Happ's
1451                                 * UGCI) cram a lot of unrelated inputs into the
1452                                 * same interface. */
1453                                hidinput->report = report;
1454                                if (drv->input_configured)
1455                                        drv->input_configured(hid, hidinput);
1456                                if (input_register_device(hidinput->input))
1457                                        goto out_cleanup;
1458                                hidinput = NULL;
1459                        }
1460                }
1461        }
1462
1463        if (hidinput && (hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
1464            !hidinput_has_been_populated(hidinput)) {
1465                /* no need to register an input device not populated */
1466                hidinput_cleanup_hidinput(hid, hidinput);
1467                hidinput = NULL;
1468        }
1469
1470        if (list_empty(&hid->inputs)) {
1471                hid_err(hid, "No inputs registered, leaving\n");
1472                goto out_unwind;
1473        }
1474
1475        if (hidinput) {
1476                if (drv->input_configured)
1477                        drv->input_configured(hid, hidinput);
1478                if (input_register_device(hidinput->input))
1479                        goto out_cleanup;
1480        }
1481
1482        return 0;
1483
1484out_cleanup:
1485        list_del(&hidinput->list);
1486        input_free_device(hidinput->input);
1487        kfree(hidinput);
1488out_unwind:
1489        /* unwind the ones we already registered */
1490        hidinput_disconnect(hid);
1491
1492        return -1;
1493}
1494EXPORT_SYMBOL_GPL(hidinput_connect);
1495
1496void hidinput_disconnect(struct hid_device *hid)
1497{
1498        struct hid_input *hidinput, *next;
1499
1500        hidinput_cleanup_battery(hid);
1501
1502        list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1503                list_del(&hidinput->list);
1504                input_unregister_device(hidinput->input);
1505                kfree(hidinput);
1506        }
1507
1508        /* led_work is spawned by input_dev callbacks, but doesn't access the
1509         * parent input_dev at all. Once all input devices are removed, we
1510         * know that led_work will never get restarted, so we can cancel it
1511         * synchronously and are safe. */
1512        cancel_work_sync(&hid->led_work);
1513}
1514EXPORT_SYMBOL_GPL(hidinput_disconnect);
1515
1516
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