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