drivers/hid/hid-input.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2000-2001 Vojtech Pavlik
   4  *  Copyright (c) 2006-2010 Jiri Kosina
   5  *
   6  *  HID to Linux Input mapping
   7  */
   8
   9 /*
  10  *
  11  * Should you need to contact me, the author, you can do so either by
  12  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  13  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/kernel.h>
  19
  20 #include <linux/hid.h>
  21 #include <linux/hid-debug.h>
  22
  23 #include "hid-ids.h"
  24
  25 #define unk     KEY_UNKNOWN
  26
  27 static const unsigned char hid_keyboard[256] = {
  28           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  29          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  30           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  31          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  32          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  33         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  34          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  35         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  36         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  37         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
  38         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  39         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  40         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  41         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
  42          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  43         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  44 };
  45
  46 static const struct {
  47         __s32 x;
  48         __s32 y;
  49 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  50
  51 struct usage_priority {
  52         __u32 usage;                    /* the HID usage associated */
  53         bool global;                    /* we assume all usages to be slotted,
  54                                          * unless global
  55                                          */
  56         unsigned int slot_overwrite;    /* for globals: allows to set the usage
  57                                          * before or after the slots
  58                                          */
  59 };
  60
  61 /*
  62  * hid-input will convert this list into priorities:
  63  * the first element will have the highest priority
  64  * (the length of the following array) and the last
  65  * element the lowest (1).
  66  *
  67  * hid-input will then shift the priority by 8 bits to leave some space
  68  * in case drivers want to interleave other fields.
  69  *
  70  * To accommodate slotted devices, the slot priority is
  71  * defined in the next 8 bits (defined by 0xff - slot).
  72  *
  73  * If drivers want to add fields before those, hid-input will
  74  * leave out the first 8 bits of the priority value.
  75  *
  76  * This still leaves us 65535 individual priority values.
  77  */
  78 static const struct usage_priority hidinput_usages_priorities[] = {
  79         { /* Eraser (eraser touching) must always come before tipswitch */
  80           .usage = HID_DG_ERASER,
  81         },
  82         { /* Invert must always come before In Range */
  83           .usage = HID_DG_INVERT,
  84         },
  85         { /* Is the tip of the tool touching? */
  86           .usage = HID_DG_TIPSWITCH,
  87         },
  88         { /* Tip Pressure might emulate tip switch */
  89           .usage = HID_DG_TIPPRESSURE,
  90         },
  91         { /* In Range needs to come after the other tool states */
  92           .usage = HID_DG_INRANGE,
  93         },
  94 };
  95
  96 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  97 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  98 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  99 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
 100 #define map_msc(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c))
 101
 102 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
 103                 &max, EV_ABS, (c))
 104 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
 105                 &max, EV_KEY, (c))
 106
 107 static bool match_scancode(struct hid_usage *usage,
 108                            unsigned int cur_idx, unsigned int scancode)
 109 {
 110         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
 111 }
 112
 113 static bool match_keycode(struct hid_usage *usage,
 114                           unsigned int cur_idx, unsigned int keycode)
 115 {
 116         /*
 117          * We should exclude unmapped usages when doing lookup by keycode.
 118          */
 119         return (usage->type == EV_KEY && usage->code == keycode);
 120 }
 121
 122 static bool match_index(struct hid_usage *usage,
 123                         unsigned int cur_idx, unsigned int idx)
 124 {
 125         return cur_idx == idx;
 126 }
 127
 128 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
 129                                 unsigned int cur_idx, unsigned int val);
 130
 131 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
 132                                            hid_usage_cmp_t match,
 133                                            unsigned int value,
 134                                            unsigned int *usage_idx)
 135 {
 136         unsigned int i, j, k, cur_idx = 0;
 137         struct hid_report *report;
 138         struct hid_usage *usage;
 139
 140         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 141                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 142                         for (i = 0; i < report->maxfield; i++) {
 143                                 for (j = 0; j < report->field[i]->maxusage; j++) {
 144                                         usage = report->field[i]->usage + j;
 145                                         if (usage->type == EV_KEY || usage->type == 0) {
 146                                                 if (match(usage, cur_idx, value)) {
 147                                                         if (usage_idx)
 148                                                                 *usage_idx = cur_idx;
 149                                                         return usage;
 150                                                 }
 151                                                 cur_idx++;
 152                                         }
 153                                 }
 154                         }
 155                 }
 156         }
 157         return NULL;
 158 }
 159
 160 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 161                                         const struct input_keymap_entry *ke,
 162                                         unsigned int *index)
 163 {
 164         struct hid_usage *usage;
 165         unsigned int scancode;
 166
 167         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 168                 usage = hidinput_find_key(hid, match_index, ke->index, index);
 169         else if (input_scancode_to_scalar(ke, &scancode) == 0)
 170                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
 171         else
 172                 usage = NULL;
 173
 174         return usage;
 175 }
 176
 177 static int hidinput_getkeycode(struct input_dev *dev,
 178                                struct input_keymap_entry *ke)
 179 {
 180         struct hid_device *hid = input_get_drvdata(dev);
 181         struct hid_usage *usage;
 182         unsigned int scancode, index;
 183
 184         usage = hidinput_locate_usage(hid, ke, &index);
 185         if (usage) {
 186                 ke->keycode = usage->type == EV_KEY ?
 187                                 usage->code : KEY_RESERVED;
 188                 ke->index = index;
 189                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 190                 ke->len = sizeof(scancode);
 191                 memcpy(ke->scancode, &scancode, sizeof(scancode));
 192                 return 0;
 193         }
 194
 195         return -EINVAL;
 196 }
 197
 198 static int hidinput_setkeycode(struct input_dev *dev,
 199                                const struct input_keymap_entry *ke,
 200                                unsigned int *old_keycode)
 201 {
 202         struct hid_device *hid = input_get_drvdata(dev);
 203         struct hid_usage *usage;
 204
 205         usage = hidinput_locate_usage(hid, ke, NULL);
 206         if (usage) {
 207                 *old_keycode = usage->type == EV_KEY ?
 208                                 usage->code : KEY_RESERVED;
 209                 usage->type = EV_KEY;
 210                 usage->code = ke->keycode;
 211
 212                 clear_bit(*old_keycode, dev->keybit);
 213                 set_bit(usage->code, dev->keybit);
 214                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
 215                         usage->code, usage->hid);
 216
 217                 /*
 218                  * Set the keybit for the old keycode if the old keycode is used
 219                  * by another key
 220                  */
 221                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 222                         set_bit(*old_keycode, dev->keybit);
 223
 224                 return 0;
 225         }
 226
 227         return -EINVAL;
 228 }
 229
 230
 231 /**
 232  * hidinput_calc_abs_res - calculate an absolute axis resolution
 233  * @field: the HID report field to calculate resolution for
 234  * @code: axis code
 235  *
 236  * The formula is:
 237  *                         (logical_maximum - logical_minimum)
 238  * resolution = ----------------------------------------------------------
 239  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 240  *
 241  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 242  *
 243  * Only exponent 1 length units are processed. Centimeters and inches are
 244  * converted to millimeters. Degrees are converted to radians.
 245  */
 246 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 247 {
 248         __s32 unit_exponent = field->unit_exponent;
 249         __s32 logical_extents = field->logical_maximum -
 250                                         field->logical_minimum;
 251         __s32 physical_extents = field->physical_maximum -
 252                                         field->physical_minimum;
 253         __s32 prev;
 254
 255         /* Check if the extents are sane */
 256         if (logical_extents <= 0 || physical_extents <= 0)
 257                 return 0;
 258
 259         /*
 260          * Verify and convert units.
 261          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 262          */
 263         switch (code) {
 264         case ABS_X:
 265         case ABS_Y:
 266         case ABS_Z:
 267         case ABS_MT_POSITION_X:
 268         case ABS_MT_POSITION_Y:
 269         case ABS_MT_TOOL_X:
 270         case ABS_MT_TOOL_Y:
 271         case ABS_MT_TOUCH_MAJOR:
 272         case ABS_MT_TOUCH_MINOR:
 273                 if (field->unit == 0x11) {              /* If centimeters */
 274                         /* Convert to millimeters */
 275                         unit_exponent += 1;
 276                 } else if (field->unit == 0x13) {       /* If inches */
 277                         /* Convert to millimeters */
 278                         prev = physical_extents;
 279                         physical_extents *= 254;
 280                         if (physical_extents < prev)
 281                                 return 0;
 282                         unit_exponent -= 1;
 283                 } else {
 284                         return 0;
 285                 }
 286                 break;
 287
 288         case ABS_RX:
 289         case ABS_RY:
 290         case ABS_RZ:
 291         case ABS_WHEEL:
 292         case ABS_TILT_X:
 293         case ABS_TILT_Y:
 294                 if (field->unit == 0x14) {              /* If degrees */
 295                         /* Convert to radians */
 296                         prev = logical_extents;
 297                         logical_extents *= 573;
 298                         if (logical_extents < prev)
 299                                 return 0;
 300                         unit_exponent += 1;
 301                 } else if (field->unit != 0x12) {       /* If not radians */
 302                         return 0;
 303                 }
 304                 break;
 305
 306         default:
 307                 return 0;
 308         }
 309
 310         /* Apply negative unit exponent */
 311         for (; unit_exponent < 0; unit_exponent++) {
 312                 prev = logical_extents;
 313                 logical_extents *= 10;
 314                 if (logical_extents < prev)
 315                         return 0;
 316         }
 317         /* Apply positive unit exponent */
 318         for (; unit_exponent > 0; unit_exponent--) {
 319                 prev = physical_extents;
 320                 physical_extents *= 10;
 321                 if (physical_extents < prev)
 322                         return 0;
 323         }
 324
 325         /* Calculate resolution */
 326         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 327 }
 328 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 329
 330 #ifdef CONFIG_HID_BATTERY_STRENGTH
 331 static enum power_supply_property hidinput_battery_props[] = {
 332         POWER_SUPPLY_PROP_PRESENT,
 333         POWER_SUPPLY_PROP_ONLINE,
 334         POWER_SUPPLY_PROP_CAPACITY,
 335         POWER_SUPPLY_PROP_MODEL_NAME,
 336         POWER_SUPPLY_PROP_STATUS,
 337         POWER_SUPPLY_PROP_SCOPE,
 338 };
 339
 340 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 341 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 342 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 343 #define HID_BATTERY_QUIRK_AVOID_QUERY   (1 << 3) /* do not query the battery */
 344
 345 static const struct hid_device_id hid_battery_quirks[] = {
 346         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 347                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 348           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 349         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 350                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 351           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 352         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 353                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 354           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 355         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 356                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 357           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 358         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 359                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 360           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 361         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 362                 USB_DEVICE_ID_ELECOM_BM084),
 363           HID_BATTERY_QUIRK_IGNORE },
 364         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 365                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
 366           HID_BATTERY_QUIRK_IGNORE },
 367         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 368                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 369           HID_BATTERY_QUIRK_IGNORE },
 370         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 371                 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 372           HID_BATTERY_QUIRK_IGNORE },
 373         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
 374           HID_BATTERY_QUIRK_IGNORE },
 375         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 376           HID_BATTERY_QUIRK_IGNORE },
 377         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 378           HID_BATTERY_QUIRK_IGNORE },
 379         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
 380           HID_BATTERY_QUIRK_AVOID_QUERY },
 381         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
 382           HID_BATTERY_QUIRK_AVOID_QUERY },
 383         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
 384           HID_BATTERY_QUIRK_AVOID_QUERY },
 385         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
 386           HID_BATTERY_QUIRK_IGNORE },
 387         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
 388           HID_BATTERY_QUIRK_IGNORE },
 389         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
 390           HID_BATTERY_QUIRK_IGNORE },
 391         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
 392           HID_BATTERY_QUIRK_IGNORE },
 393         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
 394           HID_BATTERY_QUIRK_IGNORE },
 395         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
 396           HID_BATTERY_QUIRK_IGNORE },
 397         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
 398           HID_BATTERY_QUIRK_IGNORE },
 399         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
 400           HID_BATTERY_QUIRK_IGNORE },
 401         {}
 402 };
 403
 404 static unsigned find_battery_quirk(struct hid_device *hdev)
 405 {
 406         unsigned quirks = 0;
 407         const struct hid_device_id *match;
 408
 409         match = hid_match_id(hdev, hid_battery_quirks);
 410         if (match != NULL)
 411                 quirks = match->driver_data;
 412
 413         return quirks;
 414 }
 415
 416 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 417                                            int value)
 418 {
 419         if (dev->battery_min < dev->battery_max &&
 420             value >= dev->battery_min && value <= dev->battery_max)
 421                 value = ((value - dev->battery_min) * 100) /
 422                         (dev->battery_max - dev->battery_min);
 423
 424         return value;
 425 }
 426
 427 static int hidinput_query_battery_capacity(struct hid_device *dev)
 428 {
 429         u8 *buf;
 430         int ret;
 431
 432         buf = kmalloc(4, GFP_KERNEL);
 433         if (!buf)
 434                 return -ENOMEM;
 435
 436         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 437                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 438         if (ret < 2) {
 439                 kfree(buf);
 440                 return -ENODATA;
 441         }
 442
 443         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 444         kfree(buf);
 445         return ret;
 446 }
 447
 448 static int hidinput_get_battery_property(struct power_supply *psy,
 449                                          enum power_supply_property prop,
 450                                          union power_supply_propval *val)
 451 {
 452         struct hid_device *dev = power_supply_get_drvdata(psy);
 453         int value;
 454         int ret = 0;
 455
 456         switch (prop) {
 457         case POWER_SUPPLY_PROP_PRESENT:
 458         case POWER_SUPPLY_PROP_ONLINE:
 459                 val->intval = 1;
 460                 break;
 461
 462         case POWER_SUPPLY_PROP_CAPACITY:
 463                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 464                     !dev->battery_avoid_query) {
 465                         value = hidinput_query_battery_capacity(dev);
 466                         if (value < 0)
 467                                 return value;
 468                 } else  {
 469                         value = dev->battery_capacity;
 470                 }
 471
 472                 val->intval = value;
 473                 break;
 474
 475         case POWER_SUPPLY_PROP_MODEL_NAME:
 476                 val->strval = dev->name;
 477                 break;
 478
 479         case POWER_SUPPLY_PROP_STATUS:
 480                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 481                     !dev->battery_avoid_query) {
 482                         value = hidinput_query_battery_capacity(dev);
 483                         if (value < 0)
 484                                 return value;
 485
 486                         dev->battery_capacity = value;
 487                         dev->battery_status = HID_BATTERY_QUERIED;
 488                 }
 489
 490                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 491                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 492                 else
 493                         val->intval = dev->battery_charge_status;
 494                 break;
 495
 496         case POWER_SUPPLY_PROP_SCOPE:
 497                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 498                 break;
 499
 500         default:
 501                 ret = -EINVAL;
 502                 break;
 503         }
 504
 505         return ret;
 506 }
 507
 508 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 509                                   struct hid_field *field, bool is_percentage)
 510 {
 511         struct power_supply_desc *psy_desc;
 512         struct power_supply_config psy_cfg = { .drv_data = dev, };
 513         unsigned quirks;
 514         s32 min, max;
 515         int error;
 516
 517         if (dev->battery)
 518                 return 0;       /* already initialized? */
 519
 520         quirks = find_battery_quirk(dev);
 521
 522         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 523                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 524
 525         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 526                 return 0;
 527
 528         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 529         if (!psy_desc)
 530                 return -ENOMEM;
 531
 532         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 533                                    strlen(dev->uniq) ?
 534                                         dev->uniq : dev_name(&dev->dev));
 535         if (!psy_desc->name) {
 536                 error = -ENOMEM;
 537                 goto err_free_mem;
 538         }
 539
 540         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 541         psy_desc->properties = hidinput_battery_props;
 542         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 543         psy_desc->use_for_apm = 0;
 544         psy_desc->get_property = hidinput_get_battery_property;
 545
 546         min = field->logical_minimum;
 547         max = field->logical_maximum;
 548
 549         if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
 550                 min = 0;
 551                 max = 100;
 552         }
 553
 554         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 555                 report_type = HID_FEATURE_REPORT;
 556
 557         dev->battery_min = min;
 558         dev->battery_max = max;
 559         dev->battery_report_type = report_type;
 560         dev->battery_report_id = field->report->id;
 561         dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
 562
 563         /*
 564          * Stylus is normally not connected to the device and thus we
 565          * can't query the device and get meaningful battery strength.
 566          * We have to wait for the device to report it on its own.
 567          */
 568         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 569                                    field->physical == HID_DG_STYLUS;
 570
 571         if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
 572                 dev->battery_avoid_query = true;
 573
 574         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 575         if (IS_ERR(dev->battery)) {
 576                 error = PTR_ERR(dev->battery);
 577                 hid_warn(dev, "can't register power supply: %d\n", error);
 578                 goto err_free_name;
 579         }
 580
 581         power_supply_powers(dev->battery, &dev->dev);
 582         return 0;
 583
 584 err_free_name:
 585         kfree(psy_desc->name);
 586 err_free_mem:
 587         kfree(psy_desc);
 588         dev->battery = NULL;
 589         return error;
 590 }
 591
 592 static void hidinput_cleanup_battery(struct hid_device *dev)
 593 {
 594         const struct power_supply_desc *psy_desc;
 595
 596         if (!dev->battery)
 597                 return;
 598
 599         psy_desc = dev->battery->desc;
 600         power_supply_unregister(dev->battery);
 601         kfree(psy_desc->name);
 602         kfree(psy_desc);
 603         dev->battery = NULL;
 604 }
 605
 606 static void hidinput_update_battery(struct hid_device *dev, int value)
 607 {
 608         int capacity;
 609
 610         if (!dev->battery)
 611                 return;
 612
 613         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 614                 return;
 615
 616         capacity = hidinput_scale_battery_capacity(dev, value);
 617
 618         if (dev->battery_status != HID_BATTERY_REPORTED ||
 619             capacity != dev->battery_capacity ||
 620             ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
 621                 dev->battery_capacity = capacity;
 622                 dev->battery_status = HID_BATTERY_REPORTED;
 623                 dev->battery_ratelimit_time =
 624                         ktime_add_ms(ktime_get_coarse(), 30 * 1000);
 625                 power_supply_changed(dev->battery);
 626         }
 627 }
 628
 629 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 630                                                unsigned int usage, int value)
 631 {
 632         switch (usage) {
 633         case HID_BAT_CHARGING:
 634                 dev->battery_charge_status = value ?
 635                                              POWER_SUPPLY_STATUS_CHARGING :
 636                                              POWER_SUPPLY_STATUS_DISCHARGING;
 637                 return true;
 638         }
 639
 640         return false;
 641 }
 642 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 643 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 644                                   struct hid_field *field, bool is_percentage)
 645 {
 646         return 0;
 647 }
 648
 649 static void hidinput_cleanup_battery(struct hid_device *dev)
 650 {
 651 }
 652
 653 static void hidinput_update_battery(struct hid_device *dev, int value)
 654 {
 655 }
 656
 657 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 658                                                unsigned int usage, int value)
 659 {
 660         return false;
 661 }
 662 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 663
 664 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
 665                                          unsigned int type, unsigned int usage)
 666 {
 667         struct hid_collection *collection;
 668
 669         collection = &device->collection[field->usage->collection_index];
 670
 671         return collection->type == type && collection->usage == usage;
 672 }
 673
 674 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 675                                      struct hid_usage *usage, unsigned int usage_index)
 676 {
 677         struct input_dev *input = hidinput->input;
 678         struct hid_device *device = input_get_drvdata(input);
 679         const struct usage_priority *usage_priority = NULL;
 680         int max = 0, code;
 681         unsigned int i = 0;
 682         unsigned long *bit = NULL;
 683
 684         field->hidinput = hidinput;
 685
 686         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 687                 goto ignore;
 688
 689         /* Ignore if report count is out of bounds. */
 690         if (field->report_count < 1)
 691                 goto ignore;
 692
 693         /* only LED usages are supported in output fields */
 694         if (field->report_type == HID_OUTPUT_REPORT &&
 695                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 696                 goto ignore;
 697         }
 698
 699         /* assign a priority based on the static list declared here */
 700         for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
 701                 if (usage->hid == hidinput_usages_priorities[i].usage) {
 702                         usage_priority = &hidinput_usages_priorities[i];
 703
 704                         field->usages_priorities[usage_index] =
 705                                 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
 706                         break;
 707                 }
 708         }
 709
 710         /*
 711          * For slotted devices, we need to also add the slot index
 712          * in the priority.
 713          */
 714         if (usage_priority && usage_priority->global)
 715                 field->usages_priorities[usage_index] |=
 716                         usage_priority->slot_overwrite;
 717         else
 718                 field->usages_priorities[usage_index] |=
 719                         (0xff - field->slot_idx) << 16;
 720
 721         if (device->driver->input_mapping) {
 722                 int ret = device->driver->input_mapping(device, hidinput, field,
 723                                 usage, &bit, &max);
 724                 if (ret > 0)
 725                         goto mapped;
 726                 if (ret < 0)
 727                         goto ignore;
 728         }
 729
 730         switch (usage->hid & HID_USAGE_PAGE) {
 731         case HID_UP_UNDEFINED:
 732                 goto ignore;
 733
 734         case HID_UP_KEYBOARD:
 735                 set_bit(EV_REP, input->evbit);
 736
 737                 if ((usage->hid & HID_USAGE) < 256) {
 738                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 739                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 740                 } else
 741                         map_key(KEY_UNKNOWN);
 742
 743                 break;
 744
 745         case HID_UP_BUTTON:
 746                 code = ((usage->hid - 1) & HID_USAGE);
 747
 748                 switch (field->application) {
 749                 case HID_GD_MOUSE:
 750                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 751                 case HID_GD_JOYSTICK:
 752                                 if (code <= 0xf)
 753                                         code += BTN_JOYSTICK;
 754                                 else
 755                                         code += BTN_TRIGGER_HAPPY - 0x10;
 756                                 break;
 757                 case HID_GD_GAMEPAD:
 758                                 if (code <= 0xf)
 759                                         code += BTN_GAMEPAD;
 760                                 else
 761                                         code += BTN_TRIGGER_HAPPY - 0x10;
 762                                 break;
 763                 case HID_CP_CONSUMER_CONTROL:
 764                                 if (hidinput_field_in_collection(device, field,
 765                                                                  HID_COLLECTION_NAMED_ARRAY,
 766                                                                  HID_CP_PROGRAMMABLEBUTTONS)) {
 767                                         if (code <= 0x1d)
 768                                                 code += KEY_MACRO1;
 769                                         else
 770                                                 code += BTN_TRIGGER_HAPPY - 0x1e;
 771                                         break;
 772                                 }
 773                                 fallthrough;
 774                 default:
 775                         switch (field->physical) {
 776                         case HID_GD_MOUSE:
 777                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 778                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 779                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 780                         default:              code += BTN_MISC;
 781                         }
 782                 }
 783
 784                 map_key(code);
 785                 break;
 786
 787         case HID_UP_SIMULATION:
 788                 switch (usage->hid & 0xffff) {
 789                 case 0xba: map_abs(ABS_RUDDER);   break;
 790                 case 0xbb: map_abs(ABS_THROTTLE); break;
 791                 case 0xc4: map_abs(ABS_GAS);      break;
 792                 case 0xc5: map_abs(ABS_BRAKE);    break;
 793                 case 0xc8: map_abs(ABS_WHEEL);    break;
 794                 default:   goto ignore;
 795                 }
 796                 break;
 797
 798         case HID_UP_GENDESK:
 799                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 800                         switch (usage->hid & 0xf) {
 801                         case 0x1: map_key_clear(KEY_POWER);  break;
 802                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 803                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 804                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 805                         case 0x5: map_key_clear(KEY_MENU); break;
 806                         case 0x6: map_key_clear(KEY_PROG1); break;
 807                         case 0x7: map_key_clear(KEY_HELP); break;
 808                         case 0x8: map_key_clear(KEY_EXIT); break;
 809                         case 0x9: map_key_clear(KEY_SELECT); break;
 810                         case 0xa: map_key_clear(KEY_RIGHT); break;
 811                         case 0xb: map_key_clear(KEY_LEFT); break;
 812                         case 0xc: map_key_clear(KEY_UP); break;
 813                         case 0xd: map_key_clear(KEY_DOWN); break;
 814                         case 0xe: map_key_clear(KEY_POWER2); break;
 815                         case 0xf: map_key_clear(KEY_RESTART); break;
 816                         default: goto unknown;
 817                         }
 818                         break;
 819                 }
 820
 821                 if ((usage->hid & 0xf0) == 0xa0) {      /* SystemControl */
 822                         switch (usage->hid & 0xf) {
 823                         case 0x9: map_key_clear(KEY_MICMUTE); break;
 824                         default: goto ignore;
 825                         }
 826                         break;
 827                 }
 828
 829                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 830                         switch (usage->hid & 0xf) {
 831                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 832                         default: goto ignore;
 833                         }
 834                         break;
 835                 }
 836
 837                 /*
 838                  * Some lazy vendors declare 255 usages for System Control,
 839                  * leading to the creation of ABS_X|Y axis and too many others.
 840                  * It wouldn't be a problem if joydev doesn't consider the
 841                  * device as a joystick then.
 842                  */
 843                 if (field->application == HID_GD_SYSTEM_CONTROL)
 844                         goto ignore;
 845
 846                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 847                         switch (usage->hid) {
 848                         case HID_GD_UP:    usage->hat_dir = 1; break;
 849                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 850                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 851                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 852                         default: goto unknown;
 853                         }
 854                         if (field->dpad) {
 855                                 map_abs(field->dpad);
 856                                 goto ignore;
 857                         }
 858                         map_abs(ABS_HAT0X);
 859                         break;
 860                 }
 861
 862                 switch (usage->hid) {
 863                 /* These usage IDs map directly to the usage codes. */
 864                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 865                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 866                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 867                                 map_rel(usage->hid & 0xf);
 868                         else
 869                                 map_abs_clear(usage->hid & 0xf);
 870                         break;
 871
 872                 case HID_GD_WHEEL:
 873                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 874                                 set_bit(REL_WHEEL, input->relbit);
 875                                 map_rel(REL_WHEEL_HI_RES);
 876                         } else {
 877                                 map_abs(usage->hid & 0xf);
 878                         }
 879                         break;
 880                 case HID_GD_SLIDER: case HID_GD_DIAL:
 881                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 882                                 map_rel(usage->hid & 0xf);
 883                         else
 884                                 map_abs(usage->hid & 0xf);
 885                         break;
 886
 887                 case HID_GD_HATSWITCH:
 888                         usage->hat_min = field->logical_minimum;
 889                         usage->hat_max = field->logical_maximum;
 890                         map_abs(ABS_HAT0X);
 891                         break;
 892
 893                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 894                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 895
 896                 case HID_GD_RFKILL_BTN:
 897                         /* MS wireless radio ctl extension, also check CA */
 898                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 899                                 map_key_clear(KEY_RFKILL);
 900                                 /* We need to simulate the btn release */
 901                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 902                                 break;
 903                         }
 904                         goto unknown;
 905
 906                 default: goto unknown;
 907                 }
 908
 909                 break;
 910
 911         case HID_UP_LED:
 912                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 913                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 914                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 915                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 916                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 917                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 918                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 919                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 920                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 921                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 922                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 923                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 924
 925                 default: goto ignore;
 926                 }
 927                 break;
 928
 929         case HID_UP_DIGITIZER:
 930                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 931                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 932                 else if ((field->application & 0xff) == 0x02) /* Pen */
 933                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 934
 935                 switch (usage->hid & 0xff) {
 936                 case 0x00: /* Undefined */
 937                         goto ignore;
 938
 939                 case 0x30: /* TipPressure */
 940                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 941                                 device->quirks |= HID_QUIRK_NOTOUCH;
 942                                 set_bit(EV_KEY, input->evbit);
 943                                 set_bit(BTN_TOUCH, input->keybit);
 944                         }
 945                         map_abs_clear(ABS_PRESSURE);
 946                         break;
 947
 948                 case 0x32: /* InRange */
 949                         switch (field->physical) {
 950                         case HID_DG_PUCK:
 951                                 map_key(BTN_TOOL_MOUSE);
 952                                 break;
 953                         case HID_DG_FINGER:
 954                                 map_key(BTN_TOOL_FINGER);
 955                                 break;
 956                         default:
 957                                 /*
 958                                  * If the physical is not given,
 959                                  * rely on the application.
 960                                  */
 961                                 if (!field->physical) {
 962                                         switch (field->application) {
 963                                         case HID_DG_TOUCHSCREEN:
 964                                         case HID_DG_TOUCHPAD:
 965                                                 map_key_clear(BTN_TOOL_FINGER);
 966                                                 break;
 967                                         default:
 968                                                 map_key_clear(BTN_TOOL_PEN);
 969                                         }
 970                                 } else {
 971                                         map_key(BTN_TOOL_PEN);
 972                                 }
 973                                 break;
 974                         }
 975                         break;
 976
 977                 case 0x3b: /* Battery Strength */
 978                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
 979                         usage->type = EV_PWR;
 980                         return;
 981
 982                 case 0x3c: /* Invert */
 983                         map_key_clear(BTN_TOOL_RUBBER);
 984                         break;
 985
 986                 case 0x3d: /* X Tilt */
 987                         map_abs_clear(ABS_TILT_X);
 988                         break;
 989
 990                 case 0x3e: /* Y Tilt */
 991                         map_abs_clear(ABS_TILT_Y);
 992                         break;
 993
 994                 case 0x33: /* Touch */
 995                 case 0x42: /* TipSwitch */
 996                 case 0x43: /* TipSwitch2 */
 997                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 998                         map_key_clear(BTN_TOUCH);
 999                         break;
1000
1001                 case 0x44: /* BarrelSwitch */
1002                         map_key_clear(BTN_STYLUS);
1003                         break;
1004
1005                 case 0x45: /* ERASER */
1006                         /*
1007                          * This event is reported when eraser tip touches the surface.
1008                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
1009                          * tool gets in proximity.
1010                          */
1011                         map_key_clear(BTN_TOUCH);
1012                         break;
1013
1014                 case 0x46: /* TabletPick */
1015                 case 0x5a: /* SecondaryBarrelSwitch */
1016                         map_key_clear(BTN_STYLUS2);
1017                         break;
1018
1019                 case 0x5b: /* TransducerSerialNumber */
1020                 case 0x6e: /* TransducerSerialNumber2 */
1021                         map_msc(MSC_SERIAL);
1022                         break;
1023
1024                 default:  goto unknown;
1025                 }
1026                 break;
1027
1028         case HID_UP_TELEPHONY:
1029                 switch (usage->hid & HID_USAGE) {
1030                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
1031                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
1032                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
1033                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
1034                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
1035                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
1036                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
1037                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
1038                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
1039                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
1040                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
1041                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
1042                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
1043                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
1044                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
1045                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
1046                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
1047                 default: goto ignore;
1048                 }
1049                 break;
1050
1051         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
1052                 switch (usage->hid & HID_USAGE) {
1053                 case 0x000: goto ignore;
1054                 case 0x030: map_key_clear(KEY_POWER);           break;
1055                 case 0x031: map_key_clear(KEY_RESTART);         break;
1056                 case 0x032: map_key_clear(KEY_SLEEP);           break;
1057                 case 0x034: map_key_clear(KEY_SLEEP);           break;
1058                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1059                 case 0x036: map_key_clear(BTN_MISC);            break;
1060
1061                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
1062                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
1063                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
1064                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
1065                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
1066                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
1067                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
1068                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
1069                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
1070
1071                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
1072                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
1073                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
1074                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
1075                 case 0x069: map_key_clear(KEY_RED);             break;
1076                 case 0x06a: map_key_clear(KEY_GREEN);           break;
1077                 case 0x06b: map_key_clear(KEY_BLUE);            break;
1078                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
1079                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
1080
1081                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
1082                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
1083                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
1084                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
1085                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
1086                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
1087
1088                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
1089                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
1090                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1091
1092                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
1093                 case 0x083: map_key_clear(KEY_LAST);            break;
1094                 case 0x084: map_key_clear(KEY_ENTER);           break;
1095                 case 0x088: map_key_clear(KEY_PC);              break;
1096                 case 0x089: map_key_clear(KEY_TV);              break;
1097                 case 0x08a: map_key_clear(KEY_WWW);             break;
1098                 case 0x08b: map_key_clear(KEY_DVD);             break;
1099                 case 0x08c: map_key_clear(KEY_PHONE);           break;
1100                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
1101                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
1102                 case 0x08f: map_key_clear(KEY_GAMES);           break;
1103                 case 0x090: map_key_clear(KEY_MEMO);            break;
1104                 case 0x091: map_key_clear(KEY_CD);              break;
1105                 case 0x092: map_key_clear(KEY_VCR);             break;
1106                 case 0x093: map_key_clear(KEY_TUNER);           break;
1107                 case 0x094: map_key_clear(KEY_EXIT);            break;
1108                 case 0x095: map_key_clear(KEY_HELP);            break;
1109                 case 0x096: map_key_clear(KEY_TAPE);            break;
1110                 case 0x097: map_key_clear(KEY_TV2);             break;
1111                 case 0x098: map_key_clear(KEY_SAT);             break;
1112                 case 0x09a: map_key_clear(KEY_PVR);             break;
1113
1114                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
1115                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
1116                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
1117
1118                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
1119                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
1120                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
1121                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
1122                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
1123                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
1124                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
1125                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
1126                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
1127                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
1128                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
1129                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
1130
1131                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
1132                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
1133
1134                 case 0x0d5: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);            break;
1135                 case 0x0d6: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);           break;
1136                 case 0x0d7: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);            break;
1137                 case 0x0d8: map_key_clear(KEY_DICTATE);         break;
1138                 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);    break;
1139
1140                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
1141                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
1142                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
1143                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
1144                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
1145                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
1146
1147                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
1148                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
1149                 case 0x183: map_key_clear(KEY_CONFIG);          break;
1150                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
1151                 case 0x185: map_key_clear(KEY_EDITOR);          break;
1152                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
1153                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
1154                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
1155                 case 0x189: map_key_clear(KEY_DATABASE);        break;
1156                 case 0x18a: map_key_clear(KEY_MAIL);            break;
1157                 case 0x18b: map_key_clear(KEY_NEWS);            break;
1158                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
1159                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
1160                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
1161                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
1162                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
1163                 case 0x191: map_key_clear(KEY_FINANCE);         break;
1164                 case 0x192: map_key_clear(KEY_CALC);            break;
1165                 case 0x193: map_key_clear(KEY_PLAYER);          break;
1166                 case 0x194: map_key_clear(KEY_FILE);            break;
1167                 case 0x196: map_key_clear(KEY_WWW);             break;
1168                 case 0x199: map_key_clear(KEY_CHAT);            break;
1169                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
1170                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
1171                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
1172                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1173                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1174                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1175                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1176                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1177                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1178                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1179                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1180                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1181                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1182                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1183                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1184                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1185                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1186                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1187                 case 0x201: map_key_clear(KEY_NEW);             break;
1188                 case 0x202: map_key_clear(KEY_OPEN);            break;
1189                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1190                 case 0x204: map_key_clear(KEY_EXIT);            break;
1191                 case 0x207: map_key_clear(KEY_SAVE);            break;
1192                 case 0x208: map_key_clear(KEY_PRINT);           break;
1193                 case 0x209: map_key_clear(KEY_PROPS);           break;
1194                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1195                 case 0x21b: map_key_clear(KEY_COPY);            break;
1196                 case 0x21c: map_key_clear(KEY_CUT);             break;
1197                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1198                 case 0x21f: map_key_clear(KEY_FIND);            break;
1199                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1200                 case 0x222: map_key_clear(KEY_GOTO);            break;
1201                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1202                 case 0x224: map_key_clear(KEY_BACK);            break;
1203                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1204                 case 0x226: map_key_clear(KEY_STOP);            break;
1205                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1206                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1207                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1208                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1209                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1210                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1211                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1212                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1213                 case 0x238: /* AC Pan */
1214                         set_bit(REL_HWHEEL, input->relbit);
1215                         map_rel(REL_HWHEEL_HI_RES);
1216                         break;
1217                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1218                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1219                 case 0x269: map_key_clear(KEY_INSERT);          break;
1220                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1221                 case 0x279: map_key_clear(KEY_REDO);            break;
1222
1223                 case 0x289: map_key_clear(KEY_REPLY);           break;
1224                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1225                 case 0x28c: map_key_clear(KEY_SEND);            break;
1226
1227                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1228
1229                 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1230
1231                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1232                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1233                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1234                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1235                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1236                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1237
1238                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1239
1240                 default: map_key_clear(KEY_UNKNOWN);
1241                 }
1242                 break;
1243
1244         case HID_UP_GENDEVCTRLS:
1245                 switch (usage->hid) {
1246                 case HID_DC_BATTERYSTRENGTH:
1247                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1248                         usage->type = EV_PWR;
1249                         return;
1250                 }
1251                 goto unknown;
1252
1253         case HID_UP_BATTERY:
1254                 switch (usage->hid) {
1255                 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1256                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1257                         usage->type = EV_PWR;
1258                         return;
1259                 case HID_BAT_CHARGING:
1260                         usage->type = EV_PWR;
1261                         return;
1262                 }
1263                 goto unknown;
1264
1265         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1266                 set_bit(EV_REP, input->evbit);
1267                 switch (usage->hid & HID_USAGE) {
1268                 case 0x021: map_key_clear(KEY_PRINT);           break;
1269                 case 0x070: map_key_clear(KEY_HP);              break;
1270                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1271                 case 0x072: map_key_clear(KEY_SOUND);           break;
1272                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1273                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1274                 case 0x081: map_key_clear(KEY_CHAT);            break;
1275                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1276                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1277                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1278                 case 0x085: map_key_clear(KEY_SPORT);           break;
1279                 case 0x086: map_key_clear(KEY_SHOP);            break;
1280                 default:    goto ignore;
1281                 }
1282                 break;
1283
1284         case HID_UP_HPVENDOR2:
1285                 set_bit(EV_REP, input->evbit);
1286                 switch (usage->hid & HID_USAGE) {
1287                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1288                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1289                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1290                 default:    goto ignore;
1291                 }
1292                 break;
1293
1294         case HID_UP_MSVENDOR:
1295                 goto ignore;
1296
1297         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1298                 set_bit(EV_REP, input->evbit);
1299                 goto ignore;
1300
1301         case HID_UP_LOGIVENDOR:
1302                 /* intentional fallback */
1303         case HID_UP_LOGIVENDOR2:
1304                 /* intentional fallback */
1305         case HID_UP_LOGIVENDOR3:
1306                 goto ignore;
1307
1308         case HID_UP_PID:
1309                 switch (usage->hid & HID_USAGE) {
1310                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1311                 default: goto ignore;
1312                 }
1313                 break;
1314
1315         default:
1316         unknown:
1317                 if (field->report_size == 1) {
1318                         if (field->report->type == HID_OUTPUT_REPORT) {
1319                                 map_led(LED_MISC);
1320                                 break;
1321                         }
1322                         map_key(BTN_MISC);
1323                         break;
1324                 }
1325                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1326                         map_rel(REL_MISC);
1327                         break;
1328                 }
1329                 map_abs(ABS_MISC);
1330                 break;
1331         }
1332
1333 mapped:
1334         /* Mapping failed, bail out */
1335         if (!bit)
1336                 return;
1337
1338         if (device->driver->input_mapped &&
1339             device->driver->input_mapped(device, hidinput, field, usage,
1340                                          &bit, &max) < 0) {
1341                 /*
1342                  * The driver indicated that no further generic handling
1343                  * of the usage is desired.
1344                  */
1345                 return;
1346         }
1347
1348         set_bit(usage->type, input->evbit);
1349
1350         /*
1351          * This part is *really* controversial:
1352          * - HID aims at being generic so we should do our best to export
1353          *   all incoming events
1354          * - HID describes what events are, so there is no reason for ABS_X
1355          *   to be mapped to ABS_Y
1356          * - HID is using *_MISC+N as a default value, but nothing prevents
1357          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1358          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1359          *   processing)
1360          *
1361          * If devices still want to use this (at their own risk), they will
1362          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1363          * the default should be a reliable mapping.
1364          */
1365         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1366                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1367                         usage->code = find_next_zero_bit(bit,
1368                                                          max + 1,
1369                                                          usage->code);
1370                 } else {
1371                         device->status |= HID_STAT_DUP_DETECTED;
1372                         goto ignore;
1373                 }
1374         }
1375
1376         if (usage->code > max)
1377                 goto ignore;
1378
1379         if (usage->type == EV_ABS) {
1380
1381                 int a = field->logical_minimum;
1382                 int b = field->logical_maximum;
1383
1384                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1385                         a = field->logical_minimum = 0;
1386                         b = field->logical_maximum = 255;
1387                 }
1388
1389                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1390                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1391                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1392
1393                 input_abs_set_res(input, usage->code,
1394                                   hidinput_calc_abs_res(field, usage->code));
1395
1396                 /* use a larger default input buffer for MT devices */
1397                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1398                         input_set_events_per_packet(input, 60);
1399         }
1400
1401         if (usage->type == EV_ABS &&
1402             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1403                 int i;
1404                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1405                         input_set_abs_params(input, i, -1, 1, 0, 0);
1406                         set_bit(i, input->absbit);
1407                 }
1408                 if (usage->hat_dir && !field->dpad)
1409                         field->dpad = usage->code;
1410         }
1411
1412         /* for those devices which produce Consumer volume usage as relative,
1413          * we emulate pressing volumeup/volumedown appropriate number of times
1414          * in hidinput_hid_event()
1415          */
1416         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1417                         (usage->code == ABS_VOLUME)) {
1418                 set_bit(KEY_VOLUMEUP, input->keybit);
1419                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1420         }
1421
1422         if (usage->type == EV_KEY) {
1423                 set_bit(EV_MSC, input->evbit);
1424                 set_bit(MSC_SCAN, input->mscbit);
1425         }
1426
1427         return;
1428
1429 ignore:
1430         usage->type = 0;
1431         usage->code = 0;
1432 }
1433
1434 static void hidinput_handle_scroll(struct hid_usage *usage,
1435                                    struct input_dev *input,
1436                                    __s32 value)
1437 {
1438         int code;
1439         int hi_res, lo_res;
1440
1441         if (value == 0)
1442                 return;
1443
1444         if (usage->code == REL_WHEEL_HI_RES)
1445                 code = REL_WHEEL;
1446         else
1447                 code = REL_HWHEEL;
1448
1449         /*
1450          * Windows reports one wheel click as value 120. Where a high-res
1451          * scroll wheel is present, a fraction of 120 is reported instead.
1452          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1453          * adhere to the 120 expectation.
1454          */
1455         hi_res = value * 120/usage->resolution_multiplier;
1456
1457         usage->wheel_accumulated += hi_res;
1458         lo_res = usage->wheel_accumulated/120;
1459         if (lo_res)
1460                 usage->wheel_accumulated -= lo_res * 120;
1461
1462         input_event(input, EV_REL, code, lo_res);
1463         input_event(input, EV_REL, usage->code, hi_res);
1464 }
1465
1466 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1467                                     unsigned int tool)
1468 {
1469         /* if the given tool is not currently reported, ignore */
1470         if (!test_bit(tool, input->key))
1471                 return;
1472
1473         /*
1474          * if the given tool was previously set, release it,
1475          * release any TOUCH and send an EV_SYN
1476          */
1477         input_event(input, EV_KEY, BTN_TOUCH, 0);
1478         input_event(input, EV_KEY, tool, 0);
1479         input_event(input, EV_SYN, SYN_REPORT, 0);
1480
1481         report->tool = 0;
1482 }
1483
1484 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1485                                 unsigned int new_tool)
1486 {
1487         if (report->tool != new_tool)
1488                 hid_report_release_tool(report, input, report->tool);
1489
1490         input_event(input, EV_KEY, new_tool, 1);
1491         report->tool = new_tool;
1492 }
1493
1494 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1495 {
1496         struct input_dev *input;
1497         struct hid_report *report = field->report;
1498         unsigned *quirks = &hid->quirks;
1499
1500         if (!usage->type)
1501                 return;
1502
1503         if (usage->type == EV_PWR) {
1504                 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1505
1506                 if (!handled)
1507                         hidinput_update_battery(hid, value);
1508
1509                 return;
1510         }
1511
1512         if (!field->hidinput)
1513                 return;
1514
1515         input = field->hidinput->input;
1516
1517         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1518                 int hat_dir = usage->hat_dir;
1519                 if (!hat_dir)
1520                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1521                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1522                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1523                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1524                 return;
1525         }
1526
1527         /*
1528          * Ignore out-of-range values as per HID specification,
1529          * section 5.10 and 6.2.25, when NULL state bit is present.
1530          * When it's not, clamp the value to match Microsoft's input
1531          * driver as mentioned in "Required HID usages for digitizers":
1532          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1533          *
1534          * The logical_minimum < logical_maximum check is done so that we
1535          * don't unintentionally discard values sent by devices which
1536          * don't specify logical min and max.
1537          */
1538         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1539             field->logical_minimum < field->logical_maximum) {
1540                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1541                     (value < field->logical_minimum ||
1542                      value > field->logical_maximum)) {
1543                         dbg_hid("Ignoring out-of-range value %x\n", value);
1544                         return;
1545                 }
1546                 value = clamp(value,
1547                               field->logical_minimum,
1548                               field->logical_maximum);
1549         }
1550
1551         switch (usage->hid) {
1552         case HID_DG_ERASER:
1553                 report->tool_active |= !!value;
1554
1555                 /*
1556                  * if eraser is set, we must enforce BTN_TOOL_RUBBER
1557                  * to accommodate for devices not following the spec.
1558                  */
1559                 if (value)
1560                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1561                 else if (report->tool != BTN_TOOL_RUBBER)
1562                         /* value is off, tool is not rubber, ignore */
1563                         return;
1564
1565                 /* let hid-input set BTN_TOUCH */
1566                 break;
1567
1568         case HID_DG_INVERT:
1569                 report->tool_active |= !!value;
1570
1571                 /*
1572                  * If invert is set, we store BTN_TOOL_RUBBER.
1573                  */
1574                 if (value)
1575                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1576                 else if (!report->tool_active)
1577                         /* tool_active not set means Invert and Eraser are not set */
1578                         hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1579
1580                 /* no further processing */
1581                 return;
1582
1583         case HID_DG_INRANGE:
1584                 report->tool_active |= !!value;
1585
1586                 if (report->tool_active) {
1587                         /*
1588                          * if tool is not set but is marked as active,
1589                          * assume ours
1590                          */
1591                         if (!report->tool)
1592                                 report->tool = usage->code;
1593
1594                         /* drivers may have changed the value behind our back, resend it */
1595                         hid_report_set_tool(report, input, report->tool);
1596                 } else {
1597                         hid_report_release_tool(report, input, usage->code);
1598                 }
1599
1600                 /* reset tool_active for the next event */
1601                 report->tool_active = false;
1602
1603                 /* no further processing */
1604                 return;
1605
1606         case HID_DG_TIPSWITCH:
1607                 report->tool_active |= !!value;
1608
1609                 /* if tool is set to RUBBER we should ignore the current value */
1610                 if (report->tool == BTN_TOOL_RUBBER)
1611                         return;
1612
1613                 break;
1614
1615         case HID_DG_TIPPRESSURE:
1616                 if (*quirks & HID_QUIRK_NOTOUCH) {
1617                         int a = field->logical_minimum;
1618                         int b = field->logical_maximum;
1619
1620                         if (value > a + ((b - a) >> 3)) {
1621                                 input_event(input, EV_KEY, BTN_TOUCH, 1);
1622                                 report->tool_active = true;
1623                         }
1624                 }
1625                 break;
1626
1627         case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1628                 dbg_hid("Maximum Effects - %d\n",value);
1629                 return;
1630
1631         case HID_UP_PID | 0x7fUL:
1632                 dbg_hid("PID Pool Report\n");
1633                 return;
1634         }
1635
1636         switch (usage->type) {
1637         case EV_KEY:
1638                 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1639                         return;
1640                 break;
1641
1642         case EV_REL:
1643                 if (usage->code == REL_WHEEL_HI_RES ||
1644                     usage->code == REL_HWHEEL_HI_RES) {
1645                         hidinput_handle_scroll(usage, input, value);
1646                         return;
1647                 }
1648                 break;
1649
1650         case EV_ABS:
1651                 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1652                     usage->code == ABS_VOLUME) {
1653                         int count = abs(value);
1654                         int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1655                         int i;
1656
1657                         for (i = 0; i < count; i++) {
1658                                 input_event(input, EV_KEY, direction, 1);
1659                                 input_sync(input);
1660                                 input_event(input, EV_KEY, direction, 0);
1661                                 input_sync(input);
1662                         }
1663                         return;
1664
1665                 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1666                            ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1667                         value = field->logical_maximum - value;
1668                 break;
1669         }
1670
1671         /*
1672          * Ignore reports for absolute data if the data didn't change. This is
1673          * not only an optimization but also fixes 'dead' key reports. Some
1674          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1675          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1676          * can only have one of them physically available. The 'dead' keys
1677          * report constant 0. As all map to the same keycode, they'd confuse
1678          * the input layer. If we filter the 'dead' keys on the HID level, we
1679          * skip the keycode translation and only forward real events.
1680          */
1681         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1682                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1683                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1684             usage->usage_index < field->maxusage &&
1685             value == field->value[usage->usage_index])
1686                 return;
1687
1688         /* report the usage code as scancode if the key status has changed */
1689         if (usage->type == EV_KEY &&
1690             (!test_bit(usage->code, input->key)) == value)
1691                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1692
1693         input_event(input, usage->type, usage->code, value);
1694
1695         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1696             usage->type == EV_KEY && value) {
1697                 input_sync(input);
1698                 input_event(input, usage->type, usage->code, 0);
1699         }
1700 }
1701
1702 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1703 {
1704         struct hid_input *hidinput;
1705
1706         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1707                 return;
1708
1709         list_for_each_entry(hidinput, &hid->inputs, list)
1710                 input_sync(hidinput->input);
1711 }
1712 EXPORT_SYMBOL_GPL(hidinput_report_event);
1713
1714 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1715                                unsigned int code, struct hid_field **field)
1716 {
1717         struct hid_report *report;
1718         int i, j;
1719
1720         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1721                 for (i = 0; i < report->maxfield; i++) {
1722                         *field = report->field[i];
1723                         for (j = 0; j < (*field)->maxusage; j++)
1724                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1725                                         return j;
1726                 }
1727         }
1728         return -1;
1729 }
1730
1731 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1732 {
1733         struct hid_report *report;
1734         struct hid_field *field;
1735         int i, j;
1736
1737         list_for_each_entry(report,
1738                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1739                             list) {
1740                 for (i = 0; i < report->maxfield; i++) {
1741                         field = report->field[i];
1742                         for (j = 0; j < field->maxusage; j++)
1743                                 if (field->usage[j].type == EV_LED)
1744                                         return field;
1745                 }
1746         }
1747         return NULL;
1748 }
1749 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1750
1751 unsigned int hidinput_count_leds(struct hid_device *hid)
1752 {
1753         struct hid_report *report;
1754         struct hid_field *field;
1755         int i, j;
1756         unsigned int count = 0;
1757
1758         list_for_each_entry(report,
1759                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1760                             list) {
1761                 for (i = 0; i < report->maxfield; i++) {
1762                         field = report->field[i];
1763                         for (j = 0; j < field->maxusage; j++)
1764                                 if (field->usage[j].type == EV_LED &&
1765                                     field->value[j])
1766                                         count += 1;
1767                 }
1768         }
1769         return count;
1770 }
1771 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1772
1773 static void hidinput_led_worker(struct work_struct *work)
1774 {
1775         struct hid_device *hid = container_of(work, struct hid_device,
1776                                               led_work);
1777         struct hid_field *field;
1778         struct hid_report *report;
1779         int ret;
1780         u32 len;
1781         __u8 *buf;
1782
1783         field = hidinput_get_led_field(hid);
1784         if (!field)
1785                 return;
1786
1787         /*
1788          * field->report is accessed unlocked regarding HID core. So there might
1789          * be another incoming SET-LED request from user-space, which changes
1790          * the LED state while we assemble our outgoing buffer. However, this
1791          * doesn't matter as hid_output_report() correctly converts it into a
1792          * boolean value no matter what information is currently set on the LED
1793          * field (even garbage). So the remote device will always get a valid
1794          * request.
1795          * And in case we send a wrong value, a next led worker is spawned
1796          * for every SET-LED request so the following worker will send the
1797          * correct value, guaranteed!
1798          */
1799
1800         report = field->report;
1801
1802         /* use custom SET_REPORT request if possible (asynchronous) */
1803         if (hid->ll_driver->request)
1804                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1805
1806         /* fall back to generic raw-output-report */
1807         len = hid_report_len(report);
1808         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1809         if (!buf)
1810                 return;
1811
1812         hid_output_report(report, buf);
1813         /* synchronous output report */
1814         ret = hid_hw_output_report(hid, buf, len);
1815         if (ret == -ENOSYS)
1816                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1817                                 HID_REQ_SET_REPORT);
1818         kfree(buf);
1819 }
1820
1821 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1822                                 unsigned int code, int value)
1823 {
1824         struct hid_device *hid = input_get_drvdata(dev);
1825         struct hid_field *field;
1826         int offset;
1827
1828         if (type == EV_FF)
1829                 return input_ff_event(dev, type, code, value);
1830
1831         if (type != EV_LED)
1832                 return -1;
1833
1834         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1835                 hid_warn(dev, "event field not found\n");
1836                 return -1;
1837         }
1838
1839         hid_set_field(field, offset, value);
1840
1841         schedule_work(&hid->led_work);
1842         return 0;
1843 }
1844
1845 static int hidinput_open(struct input_dev *dev)
1846 {
1847         struct hid_device *hid = input_get_drvdata(dev);
1848
1849         return hid_hw_open(hid);
1850 }
1851
1852 static void hidinput_close(struct input_dev *dev)
1853 {
1854         struct hid_device *hid = input_get_drvdata(dev);
1855
1856         hid_hw_close(hid);
1857 }
1858
1859 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1860                 struct hid_report *report, bool use_logical_max)
1861 {
1862         struct hid_usage *usage;
1863         bool update_needed = false;
1864         bool get_report_completed = false;
1865         int i, j;
1866
1867         if (report->maxfield == 0)
1868                 return false;
1869
1870         for (i = 0; i < report->maxfield; i++) {
1871                 __s32 value = use_logical_max ?
1872                               report->field[i]->logical_maximum :
1873                               report->field[i]->logical_minimum;
1874
1875                 /* There is no good reason for a Resolution
1876                  * Multiplier to have a count other than 1.
1877                  * Ignore that case.
1878                  */
1879                 if (report->field[i]->report_count != 1)
1880                         continue;
1881
1882                 for (j = 0; j < report->field[i]->maxusage; j++) {
1883                         usage = &report->field[i]->usage[j];
1884
1885                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1886                                 continue;
1887
1888                         /*
1889                          * If we have more than one feature within this
1890                          * report we need to fill in the bits from the
1891                          * others before we can overwrite the ones for the
1892                          * Resolution Multiplier.
1893                          *
1894                          * But if we're not allowed to read from the device,
1895                          * we just bail. Such a device should not exist
1896                          * anyway.
1897                          */
1898                         if (!get_report_completed && report->maxfield > 1) {
1899                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1900                                         return update_needed;
1901
1902                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1903                                 hid_hw_wait(hid);
1904                                 get_report_completed = true;
1905                         }
1906
1907                         report->field[i]->value[j] = value;
1908                         update_needed = true;
1909                 }
1910         }
1911
1912         return update_needed;
1913 }
1914
1915 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1916 {
1917         struct hid_report_enum *rep_enum;
1918         struct hid_report *rep;
1919         int ret;
1920
1921         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1922         list_for_each_entry(rep, &rep_enum->report_list, list) {
1923                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1924                                                                      rep, true);
1925
1926                 if (update_needed) {
1927                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1928                         if (ret) {
1929                                 __hidinput_change_resolution_multipliers(hid,
1930                                                                     rep, false);
1931                                 return;
1932                         }
1933                 }
1934         }
1935
1936         /* refresh our structs */
1937         hid_setup_resolution_multiplier(hid);
1938 }
1939
1940 static void report_features(struct hid_device *hid)
1941 {
1942         struct hid_driver *drv = hid->driver;
1943         struct hid_report_enum *rep_enum;
1944         struct hid_report *rep;
1945         struct hid_usage *usage;
1946         int i, j;
1947
1948         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1949         list_for_each_entry(rep, &rep_enum->report_list, list)
1950                 for (i = 0; i < rep->maxfield; i++) {
1951                         /* Ignore if report count is out of bounds. */
1952                         if (rep->field[i]->report_count < 1)
1953                                 continue;
1954
1955                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1956                                 usage = &rep->field[i]->usage[j];
1957
1958                                 /* Verify if Battery Strength feature is available */
1959                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1960                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1961                                                                rep->field[i], false);
1962
1963                                 if (drv->feature_mapping)
1964                                         drv->feature_mapping(hid, rep->field[i], usage);
1965                         }
1966                 }
1967 }
1968
1969 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1970                                            unsigned int application)
1971 {
1972         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1973         struct input_dev *input_dev = input_allocate_device();
1974         const char *suffix = NULL;
1975         size_t suffix_len, name_len;
1976
1977         if (!hidinput || !input_dev)
1978                 goto fail;
1979
1980         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
1981             hid->maxapplication > 1) {
1982                 switch (application) {
1983                 case HID_GD_KEYBOARD:
1984                         suffix = "Keyboard";
1985                         break;
1986                 case HID_GD_KEYPAD:
1987                         suffix = "Keypad";
1988                         break;
1989                 case HID_GD_MOUSE:
1990                         suffix = "Mouse";
1991                         break;
1992                 case HID_DG_PEN:
1993                         /*
1994                          * yes, there is an issue here:
1995                          *  DG_PEN -> "Stylus"
1996                          *  DG_STYLUS -> "Pen"
1997                          * But changing this now means users with config snippets
1998                          * will have to change it and the test suite will not be happy.
1999                          */
2000                         suffix = "Stylus";
2001                         break;
2002                 case HID_DG_STYLUS:
2003                         suffix = "Pen";
2004                         break;
2005                 case HID_DG_TOUCHSCREEN:
2006                         suffix = "Touchscreen";
2007                         break;
2008                 case HID_DG_TOUCHPAD:
2009                         suffix = "Touchpad";
2010                         break;
2011                 case HID_GD_SYSTEM_CONTROL:
2012                         suffix = "System Control";
2013                         break;
2014                 case HID_CP_CONSUMER_CONTROL:
2015                         suffix = "Consumer Control";
2016                         break;
2017                 case HID_GD_WIRELESS_RADIO_CTLS:
2018                         suffix = "Wireless Radio Control";
2019                         break;
2020                 case HID_GD_SYSTEM_MULTIAXIS:
2021                         suffix = "System Multi Axis";
2022                         break;
2023                 default:
2024                         break;
2025                 }
2026         }
2027
2028         if (suffix) {
2029                 name_len = strlen(hid->name);
2030                 suffix_len = strlen(suffix);
2031                 if ((name_len < suffix_len) ||
2032                     strcmp(hid->name + name_len - suffix_len, suffix)) {
2033                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2034                                                    hid->name, suffix);
2035                         if (!hidinput->name)
2036                                 goto fail;
2037                 }
2038         }
2039
2040         input_set_drvdata(input_dev, hid);
2041         input_dev->event = hidinput_input_event;
2042         input_dev->open = hidinput_open;
2043         input_dev->close = hidinput_close;
2044         input_dev->setkeycode = hidinput_setkeycode;
2045         input_dev->getkeycode = hidinput_getkeycode;
2046
2047         input_dev->name = hidinput->name ? hidinput->name : hid->name;
2048         input_dev->phys = hid->phys;
2049         input_dev->uniq = hid->uniq;
2050         input_dev->id.bustype = hid->bus;
2051         input_dev->id.vendor  = hid->vendor;
2052         input_dev->id.product = hid->product;
2053         input_dev->id.version = hid->version;
2054         input_dev->dev.parent = &hid->dev;
2055
2056         hidinput->input = input_dev;
2057         hidinput->application = application;
2058         list_add_tail(&hidinput->list, &hid->inputs);
2059
2060         INIT_LIST_HEAD(&hidinput->reports);
2061
2062         return hidinput;
2063
2064 fail:
2065         kfree(hidinput);
2066         input_free_device(input_dev);
2067         hid_err(hid, "Out of memory during hid input probe\n");
2068         return NULL;
2069 }
2070
2071 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2072 {
2073         int i;
2074         unsigned long r = 0;
2075
2076         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2077                 r |= hidinput->input->evbit[i];
2078
2079         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2080                 r |= hidinput->input->keybit[i];
2081
2082         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2083                 r |= hidinput->input->relbit[i];
2084
2085         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2086                 r |= hidinput->input->absbit[i];
2087
2088         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2089                 r |= hidinput->input->mscbit[i];
2090
2091         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2092                 r |= hidinput->input->ledbit[i];
2093
2094         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2095                 r |= hidinput->input->sndbit[i];
2096
2097         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2098                 r |= hidinput->input->ffbit[i];
2099
2100         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2101                 r |= hidinput->input->swbit[i];
2102
2103         return !!r;
2104 }
2105
2106 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2107                 struct hid_input *hidinput)
2108 {
2109         struct hid_report *report;
2110         int i, k;
2111
2112         list_del(&hidinput->list);
2113         input_free_device(hidinput->input);
2114         kfree(hidinput->name);
2115
2116         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2117                 if (k == HID_OUTPUT_REPORT &&
2118                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2119                         continue;
2120
2121                 list_for_each_entry(report, &hid->report_enum[k].report_list,
2122                                     list) {
2123
2124                         for (i = 0; i < report->maxfield; i++)
2125                                 if (report->field[i]->hidinput == hidinput)
2126                                         report->field[i]->hidinput = NULL;
2127                 }
2128         }
2129
2130         kfree(hidinput);
2131 }
2132
2133 static struct hid_input *hidinput_match(struct hid_report *report)
2134 {
2135         struct hid_device *hid = report->device;
2136         struct hid_input *hidinput;
2137
2138         list_for_each_entry(hidinput, &hid->inputs, list) {
2139                 if (hidinput->report &&
2140                     hidinput->report->id == report->id)
2141                         return hidinput;
2142         }
2143
2144         return NULL;
2145 }
2146
2147 static struct hid_input *hidinput_match_application(struct hid_report *report)
2148 {
2149         struct hid_device *hid = report->device;
2150         struct hid_input *hidinput;
2151
2152         list_for_each_entry(hidinput, &hid->inputs, list) {
2153                 if (hidinput->application == report->application)
2154                         return hidinput;
2155
2156                 /*
2157                  * Keep SystemControl and ConsumerControl applications together
2158                  * with the main keyboard, if present.
2159                  */
2160                 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2161                      report->application == HID_CP_CONSUMER_CONTROL) &&
2162                     hidinput->application == HID_GD_KEYBOARD) {
2163                         return hidinput;
2164                 }
2165         }
2166
2167         return NULL;
2168 }
2169
2170 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2171                                              struct hid_report *report)
2172 {
2173         int i, j, k;
2174         int first_field_index = 0;
2175         int slot_collection_index = -1;
2176         int prev_collection_index = -1;
2177         unsigned int slot_idx = 0;
2178         struct hid_field *field;
2179
2180         /*
2181          * First tag all the fields that are part of a slot,
2182          * a slot needs to have one Contact ID in the collection
2183          */
2184         for (i = 0; i < report->maxfield; i++) {
2185                 field = report->field[i];
2186
2187                 /* ignore fields without usage */
2188                 if (field->maxusage < 1)
2189                         continue;
2190
2191                 /*
2192                  * janitoring when collection_index changes
2193                  */
2194                 if (prev_collection_index != field->usage->collection_index) {
2195                         prev_collection_index = field->usage->collection_index;
2196                         first_field_index = i;
2197                 }
2198
2199                 /*
2200                  * if we already found a Contact ID in the collection,
2201                  * tag and continue to the next.
2202                  */
2203                 if (slot_collection_index == field->usage->collection_index) {
2204                         field->slot_idx = slot_idx;
2205                         continue;
2206                 }
2207
2208                 /* check if the current field has Contact ID */
2209                 for (j = 0; j < field->maxusage; j++) {
2210                         if (field->usage[j].hid == HID_DG_CONTACTID) {
2211                                 slot_collection_index = field->usage->collection_index;
2212                                 slot_idx++;
2213
2214                                 /*
2215                                  * mark all previous fields and this one in the
2216                                  * current collection to be slotted.
2217                                  */
2218                                 for (k = first_field_index; k <= i; k++)
2219                                         report->field[k]->slot_idx = slot_idx;
2220                                 break;
2221                         }
2222                 }
2223         }
2224
2225         for (i = 0; i < report->maxfield; i++)
2226                 for (j = 0; j < report->field[i]->maxusage; j++)
2227                         hidinput_configure_usage(hidinput, report->field[i],
2228                                                  report->field[i]->usage + j,
2229                                                  j);
2230 }
2231
2232 /*
2233  * Register the input device; print a message.
2234  * Configure the input layer interface
2235  * Read all reports and initialize the absolute field values.
2236  */
2237
2238 int hidinput_connect(struct hid_device *hid, unsigned int force)
2239 {
2240         struct hid_driver *drv = hid->driver;
2241         struct hid_report *report;
2242         struct hid_input *next, *hidinput = NULL;
2243         unsigned int application;
2244         int i, k;
2245
2246         INIT_LIST_HEAD(&hid->inputs);
2247         INIT_WORK(&hid->led_work, hidinput_led_worker);
2248
2249         hid->status &= ~HID_STAT_DUP_DETECTED;
2250
2251         if (!force) {
2252                 for (i = 0; i < hid->maxcollection; i++) {
2253                         struct hid_collection *col = &hid->collection[i];
2254                         if (col->type == HID_COLLECTION_APPLICATION ||
2255                                         col->type == HID_COLLECTION_PHYSICAL)
2256                                 if (IS_INPUT_APPLICATION(col->usage))
2257                                         break;
2258                 }
2259
2260                 if (i == hid->maxcollection)
2261                         return -1;
2262         }
2263
2264         report_features(hid);
2265
2266         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2267                 if (k == HID_OUTPUT_REPORT &&
2268                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2269                         continue;
2270
2271                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2272
2273                         if (!report->maxfield)
2274                                 continue;
2275
2276                         application = report->application;
2277
2278                         /*
2279                          * Find the previous hidinput report attached
2280                          * to this report id.
2281                          */
2282                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2283                                 hidinput = hidinput_match(report);
2284                         else if (hid->maxapplication > 1 &&
2285                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2286                                 hidinput = hidinput_match_application(report);
2287
2288                         if (!hidinput) {
2289                                 hidinput = hidinput_allocate(hid, application);
2290                                 if (!hidinput)
2291                                         goto out_unwind;
2292                         }
2293
2294                         hidinput_configure_usages(hidinput, report);
2295
2296                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2297                                 hidinput->report = report;
2298
2299                         list_add_tail(&report->hidinput_list,
2300                                       &hidinput->reports);
2301                 }
2302         }
2303
2304         hidinput_change_resolution_multipliers(hid);
2305
2306         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2307                 if (drv->input_configured &&
2308                     drv->input_configured(hid, hidinput))
2309                         goto out_unwind;
2310
2311                 if (!hidinput_has_been_populated(hidinput)) {
2312                         /* no need to register an input device not populated */
2313                         hidinput_cleanup_hidinput(hid, hidinput);
2314                         continue;
2315                 }
2316
2317                 if (input_register_device(hidinput->input))
2318                         goto out_unwind;
2319                 hidinput->registered = true;
2320         }
2321
2322         if (list_empty(&hid->inputs)) {
2323                 hid_err(hid, "No inputs registered, leaving\n");
2324                 goto out_unwind;
2325         }
2326
2327         if (hid->status & HID_STAT_DUP_DETECTED)
2328                 hid_dbg(hid,
2329                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2330
2331         return 0;
2332
2333 out_unwind:
2334         /* unwind the ones we already registered */
2335         hidinput_disconnect(hid);
2336
2337         return -1;
2338 }
2339 EXPORT_SYMBOL_GPL(hidinput_connect);
2340
2341 void hidinput_disconnect(struct hid_device *hid)
2342 {
2343         struct hid_input *hidinput, *next;
2344
2345         hidinput_cleanup_battery(hid);
2346
2347         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2348                 list_del(&hidinput->list);
2349                 if (hidinput->registered)
2350                         input_unregister_device(hidinput->input);
2351                 else
2352                         input_free_device(hidinput->input);
2353                 kfree(hidinput->name);
2354                 kfree(hidinput);
2355         }
2356
2357         /* led_work is spawned by input_dev callbacks, but doesn't access the
2358          * parent input_dev at all. Once all input devices are removed, we
2359          * know that led_work will never get restarted, so we can cancel it
2360          * synchronously and are safe. */
2361         cancel_work_sync(&hid->led_work);
2362 }
2363 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2364
2365 #ifdef CONFIG_HID_KUNIT_TEST
2366 #include "hid-input-test.c"
2367 #endif