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_APPLE,
 362                 USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
 363           HID_BATTERY_QUIRK_IGNORE },
 364         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 365                 USB_DEVICE_ID_ELECOM_BM084),
 366           HID_BATTERY_QUIRK_IGNORE },
 367         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 368                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
 369           HID_BATTERY_QUIRK_IGNORE },
 370         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 371                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 372           HID_BATTERY_QUIRK_IGNORE },
 373         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 374                 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 375           HID_BATTERY_QUIRK_IGNORE },
 376         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
 377           HID_BATTERY_QUIRK_IGNORE },
 378         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_GV301RA_TOUCHSCREEN),
 379           HID_BATTERY_QUIRK_IGNORE },
 380         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 381           HID_BATTERY_QUIRK_IGNORE },
 382         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 383           HID_BATTERY_QUIRK_IGNORE },
 384         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
 385           HID_BATTERY_QUIRK_AVOID_QUERY },
 386         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
 387           HID_BATTERY_QUIRK_AVOID_QUERY },
 388         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
 389           HID_BATTERY_QUIRK_AVOID_QUERY },
 390         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
 391           HID_BATTERY_QUIRK_IGNORE },
 392         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
 393           HID_BATTERY_QUIRK_IGNORE },
 394         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
 395           HID_BATTERY_QUIRK_IGNORE },
 396         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
 397           HID_BATTERY_QUIRK_IGNORE },
 398         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
 399           HID_BATTERY_QUIRK_IGNORE },
 400         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
 401           HID_BATTERY_QUIRK_IGNORE },
 402         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
 403           HID_BATTERY_QUIRK_IGNORE },
 404         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
 405           HID_BATTERY_QUIRK_IGNORE },
 406         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13T_AW100),
 407           HID_BATTERY_QUIRK_IGNORE },
 408         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V1),
 409           HID_BATTERY_QUIRK_IGNORE },
 410         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V2),
 411           HID_BATTERY_QUIRK_IGNORE },
 412         {}
 413 };
 414
 415 static unsigned find_battery_quirk(struct hid_device *hdev)
 416 {
 417         unsigned quirks = 0;
 418         const struct hid_device_id *match;
 419
 420         match = hid_match_id(hdev, hid_battery_quirks);
 421         if (match != NULL)
 422                 quirks = match->driver_data;
 423
 424         return quirks;
 425 }
 426
 427 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 428                                            int value)
 429 {
 430         if (dev->battery_min < dev->battery_max &&
 431             value >= dev->battery_min && value <= dev->battery_max)
 432                 value = ((value - dev->battery_min) * 100) /
 433                         (dev->battery_max - dev->battery_min);
 434
 435         return value;
 436 }
 437
 438 static int hidinput_query_battery_capacity(struct hid_device *dev)
 439 {
 440         u8 *buf;
 441         int ret;
 442
 443         buf = kmalloc(4, GFP_KERNEL);
 444         if (!buf)
 445                 return -ENOMEM;
 446
 447         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 448                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 449         if (ret < 2) {
 450                 kfree(buf);
 451                 return -ENODATA;
 452         }
 453
 454         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 455         kfree(buf);
 456         return ret;
 457 }
 458
 459 static int hidinput_get_battery_property(struct power_supply *psy,
 460                                          enum power_supply_property prop,
 461                                          union power_supply_propval *val)
 462 {
 463         struct hid_device *dev = power_supply_get_drvdata(psy);
 464         int value;
 465         int ret = 0;
 466
 467         switch (prop) {
 468         case POWER_SUPPLY_PROP_PRESENT:
 469         case POWER_SUPPLY_PROP_ONLINE:
 470                 val->intval = 1;
 471                 break;
 472
 473         case POWER_SUPPLY_PROP_CAPACITY:
 474                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 475                     !dev->battery_avoid_query) {
 476                         value = hidinput_query_battery_capacity(dev);
 477                         if (value < 0)
 478                                 return value;
 479                 } else  {
 480                         value = dev->battery_capacity;
 481                 }
 482
 483                 val->intval = value;
 484                 break;
 485
 486         case POWER_SUPPLY_PROP_MODEL_NAME:
 487                 val->strval = dev->name;
 488                 break;
 489
 490         case POWER_SUPPLY_PROP_STATUS:
 491                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 492                     !dev->battery_avoid_query) {
 493                         value = hidinput_query_battery_capacity(dev);
 494                         if (value < 0)
 495                                 return value;
 496
 497                         dev->battery_capacity = value;
 498                         dev->battery_status = HID_BATTERY_QUERIED;
 499                 }
 500
 501                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 502                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 503                 else
 504                         val->intval = dev->battery_charge_status;
 505                 break;
 506
 507         case POWER_SUPPLY_PROP_SCOPE:
 508                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 509                 break;
 510
 511         default:
 512                 ret = -EINVAL;
 513                 break;
 514         }
 515
 516         return ret;
 517 }
 518
 519 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 520                                   struct hid_field *field, bool is_percentage)
 521 {
 522         struct power_supply_desc *psy_desc;
 523         struct power_supply_config psy_cfg = { .drv_data = dev, };
 524         unsigned quirks;
 525         s32 min, max;
 526         int error;
 527
 528         if (dev->battery)
 529                 return 0;       /* already initialized? */
 530
 531         quirks = find_battery_quirk(dev);
 532
 533         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 534                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 535
 536         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 537                 return 0;
 538
 539         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 540         if (!psy_desc)
 541                 return -ENOMEM;
 542
 543         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 544                                    strlen(dev->uniq) ?
 545                                         dev->uniq : dev_name(&dev->dev));
 546         if (!psy_desc->name) {
 547                 error = -ENOMEM;
 548                 goto err_free_mem;
 549         }
 550
 551         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 552         psy_desc->properties = hidinput_battery_props;
 553         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 554         psy_desc->use_for_apm = 0;
 555         psy_desc->get_property = hidinput_get_battery_property;
 556
 557         min = field->logical_minimum;
 558         max = field->logical_maximum;
 559
 560         if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
 561                 min = 0;
 562                 max = 100;
 563         }
 564
 565         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 566                 report_type = HID_FEATURE_REPORT;
 567
 568         dev->battery_min = min;
 569         dev->battery_max = max;
 570         dev->battery_report_type = report_type;
 571         dev->battery_report_id = field->report->id;
 572         dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
 573
 574         /*
 575          * Stylus is normally not connected to the device and thus we
 576          * can't query the device and get meaningful battery strength.
 577          * We have to wait for the device to report it on its own.
 578          */
 579         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 580                                    field->physical == HID_DG_STYLUS;
 581
 582         if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
 583                 dev->battery_avoid_query = true;
 584
 585         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 586         if (IS_ERR(dev->battery)) {
 587                 error = PTR_ERR(dev->battery);
 588                 hid_warn(dev, "can't register power supply: %d\n", error);
 589                 goto err_free_name;
 590         }
 591
 592         power_supply_powers(dev->battery, &dev->dev);
 593         return 0;
 594
 595 err_free_name:
 596         kfree(psy_desc->name);
 597 err_free_mem:
 598         kfree(psy_desc);
 599         dev->battery = NULL;
 600         return error;
 601 }
 602
 603 static void hidinput_cleanup_battery(struct hid_device *dev)
 604 {
 605         const struct power_supply_desc *psy_desc;
 606
 607         if (!dev->battery)
 608                 return;
 609
 610         psy_desc = dev->battery->desc;
 611         power_supply_unregister(dev->battery);
 612         kfree(psy_desc->name);
 613         kfree(psy_desc);
 614         dev->battery = NULL;
 615 }
 616
 617 static void hidinput_update_battery(struct hid_device *dev, int value)
 618 {
 619         int capacity;
 620
 621         if (!dev->battery)
 622                 return;
 623
 624         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 625                 return;
 626
 627         capacity = hidinput_scale_battery_capacity(dev, value);
 628
 629         if (dev->battery_status != HID_BATTERY_REPORTED ||
 630             capacity != dev->battery_capacity ||
 631             ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
 632                 dev->battery_capacity = capacity;
 633                 dev->battery_status = HID_BATTERY_REPORTED;
 634                 dev->battery_ratelimit_time =
 635                         ktime_add_ms(ktime_get_coarse(), 30 * 1000);
 636                 power_supply_changed(dev->battery);
 637         }
 638 }
 639
 640 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 641                                                unsigned int usage, int value)
 642 {
 643         switch (usage) {
 644         case HID_BAT_CHARGING:
 645                 dev->battery_charge_status = value ?
 646                                              POWER_SUPPLY_STATUS_CHARGING :
 647                                              POWER_SUPPLY_STATUS_DISCHARGING;
 648                 return true;
 649         }
 650
 651         return false;
 652 }
 653 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 654 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 655                                   struct hid_field *field, bool is_percentage)
 656 {
 657         return 0;
 658 }
 659
 660 static void hidinput_cleanup_battery(struct hid_device *dev)
 661 {
 662 }
 663
 664 static void hidinput_update_battery(struct hid_device *dev, int value)
 665 {
 666 }
 667
 668 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 669                                                unsigned int usage, int value)
 670 {
 671         return false;
 672 }
 673 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 674
 675 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
 676                                          unsigned int type, unsigned int usage)
 677 {
 678         struct hid_collection *collection;
 679
 680         collection = &device->collection[field->usage->collection_index];
 681
 682         return collection->type == type && collection->usage == usage;
 683 }
 684
 685 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 686                                      struct hid_usage *usage, unsigned int usage_index)
 687 {
 688         struct input_dev *input = hidinput->input;
 689         struct hid_device *device = input_get_drvdata(input);
 690         const struct usage_priority *usage_priority = NULL;
 691         int max = 0, code;
 692         unsigned int i = 0;
 693         unsigned long *bit = NULL;
 694
 695         field->hidinput = hidinput;
 696
 697         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 698                 goto ignore;
 699
 700         /* Ignore if report count is out of bounds. */
 701         if (field->report_count < 1)
 702                 goto ignore;
 703
 704         /* only LED usages are supported in output fields */
 705         if (field->report_type == HID_OUTPUT_REPORT &&
 706                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 707                 goto ignore;
 708         }
 709
 710         /* assign a priority based on the static list declared here */
 711         for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
 712                 if (usage->hid == hidinput_usages_priorities[i].usage) {
 713                         usage_priority = &hidinput_usages_priorities[i];
 714
 715                         field->usages_priorities[usage_index] =
 716                                 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
 717                         break;
 718                 }
 719         }
 720
 721         /*
 722          * For slotted devices, we need to also add the slot index
 723          * in the priority.
 724          */
 725         if (usage_priority && usage_priority->global)
 726                 field->usages_priorities[usage_index] |=
 727                         usage_priority->slot_overwrite;
 728         else
 729                 field->usages_priorities[usage_index] |=
 730                         (0xff - field->slot_idx) << 16;
 731
 732         if (device->driver->input_mapping) {
 733                 int ret = device->driver->input_mapping(device, hidinput, field,
 734                                 usage, &bit, &max);
 735                 if (ret > 0)
 736                         goto mapped;
 737                 if (ret < 0)
 738                         goto ignore;
 739         }
 740
 741         switch (usage->hid & HID_USAGE_PAGE) {
 742         case HID_UP_UNDEFINED:
 743                 goto ignore;
 744
 745         case HID_UP_KEYBOARD:
 746                 set_bit(EV_REP, input->evbit);
 747
 748                 if ((usage->hid & HID_USAGE) < 256) {
 749                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 750                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 751                 } else
 752                         map_key(KEY_UNKNOWN);
 753
 754                 break;
 755
 756         case HID_UP_BUTTON:
 757                 code = ((usage->hid - 1) & HID_USAGE);
 758
 759                 switch (field->application) {
 760                 case HID_GD_MOUSE:
 761                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 762                 case HID_GD_JOYSTICK:
 763                                 if (code <= 0xf)
 764                                         code += BTN_JOYSTICK;
 765                                 else
 766                                         code += BTN_TRIGGER_HAPPY - 0x10;
 767                                 break;
 768                 case HID_GD_GAMEPAD:
 769                                 if (code <= 0xf)
 770                                         code += BTN_GAMEPAD;
 771                                 else
 772                                         code += BTN_TRIGGER_HAPPY - 0x10;
 773                                 break;
 774                 case HID_CP_CONSUMER_CONTROL:
 775                                 if (hidinput_field_in_collection(device, field,
 776                                                                  HID_COLLECTION_NAMED_ARRAY,
 777                                                                  HID_CP_PROGRAMMABLEBUTTONS)) {
 778                                         if (code <= 0x1d)
 779                                                 code += KEY_MACRO1;
 780                                         else
 781                                                 code += BTN_TRIGGER_HAPPY - 0x1e;
 782                                         break;
 783                                 }
 784                                 fallthrough;
 785                 default:
 786                         switch (field->physical) {
 787                         case HID_GD_MOUSE:
 788                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 789                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 790                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 791                         default:              code += BTN_MISC;
 792                         }
 793                 }
 794
 795                 map_key(code);
 796                 break;
 797
 798         case HID_UP_SIMULATION:
 799                 switch (usage->hid & 0xffff) {
 800                 case 0xba: map_abs(ABS_RUDDER);   break;
 801                 case 0xbb: map_abs(ABS_THROTTLE); break;
 802                 case 0xc4: map_abs(ABS_GAS);      break;
 803                 case 0xc5: map_abs(ABS_BRAKE);    break;
 804                 case 0xc8: map_abs(ABS_WHEEL);    break;
 805                 default:   goto ignore;
 806                 }
 807                 break;
 808
 809         case HID_UP_GENDESK:
 810                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 811                         switch (usage->hid & 0xf) {
 812                         case 0x1: map_key_clear(KEY_POWER);  break;
 813                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 814                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 815                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 816                         case 0x5: map_key_clear(KEY_MENU); break;
 817                         case 0x6: map_key_clear(KEY_PROG1); break;
 818                         case 0x7: map_key_clear(KEY_HELP); break;
 819                         case 0x8: map_key_clear(KEY_EXIT); break;
 820                         case 0x9: map_key_clear(KEY_SELECT); break;
 821                         case 0xa: map_key_clear(KEY_RIGHT); break;
 822                         case 0xb: map_key_clear(KEY_LEFT); break;
 823                         case 0xc: map_key_clear(KEY_UP); break;
 824                         case 0xd: map_key_clear(KEY_DOWN); break;
 825                         case 0xe: map_key_clear(KEY_POWER2); break;
 826                         case 0xf: map_key_clear(KEY_RESTART); break;
 827                         default: goto unknown;
 828                         }
 829                         break;
 830                 }
 831
 832                 if ((usage->hid & 0xf0) == 0xa0) {      /* SystemControl */
 833                         switch (usage->hid & 0xf) {
 834                         case 0x9: map_key_clear(KEY_MICMUTE); break;
 835                         default: goto ignore;
 836                         }
 837                         break;
 838                 }
 839
 840                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 841                         switch (usage->hid & 0xf) {
 842                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 843                         default: goto ignore;
 844                         }
 845                         break;
 846                 }
 847
 848                 /*
 849                  * Some lazy vendors declare 255 usages for System Control,
 850                  * leading to the creation of ABS_X|Y axis and too many others.
 851                  * It wouldn't be a problem if joydev doesn't consider the
 852                  * device as a joystick then.
 853                  */
 854                 if (field->application == HID_GD_SYSTEM_CONTROL)
 855                         goto ignore;
 856
 857                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 858                         switch (usage->hid) {
 859                         case HID_GD_UP:    usage->hat_dir = 1; break;
 860                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 861                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 862                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 863                         default: goto unknown;
 864                         }
 865                         if (field->dpad) {
 866                                 map_abs(field->dpad);
 867                                 goto ignore;
 868                         }
 869                         map_abs(ABS_HAT0X);
 870                         break;
 871                 }
 872
 873                 switch (usage->hid) {
 874                 /* These usage IDs map directly to the usage codes. */
 875                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 876                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 877                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 878                                 map_rel(usage->hid & 0xf);
 879                         else
 880                                 map_abs_clear(usage->hid & 0xf);
 881                         break;
 882
 883                 case HID_GD_WHEEL:
 884                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 885                                 set_bit(REL_WHEEL, input->relbit);
 886                                 map_rel(REL_WHEEL_HI_RES);
 887                         } else {
 888                                 map_abs(usage->hid & 0xf);
 889                         }
 890                         break;
 891                 case HID_GD_SLIDER: case HID_GD_DIAL:
 892                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 893                                 map_rel(usage->hid & 0xf);
 894                         else
 895                                 map_abs(usage->hid & 0xf);
 896                         break;
 897
 898                 case HID_GD_HATSWITCH:
 899                         usage->hat_min = field->logical_minimum;
 900                         usage->hat_max = field->logical_maximum;
 901                         map_abs(ABS_HAT0X);
 902                         break;
 903
 904                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 905                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 906
 907                 case HID_GD_RFKILL_BTN:
 908                         /* MS wireless radio ctl extension, also check CA */
 909                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 910                                 map_key_clear(KEY_RFKILL);
 911                                 /* We need to simulate the btn release */
 912                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 913                                 break;
 914                         }
 915                         goto unknown;
 916
 917                 default: goto unknown;
 918                 }
 919
 920                 break;
 921
 922         case HID_UP_LED:
 923                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 924                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 925                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 926                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 927                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 928                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 929                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 930                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 931                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 932                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 933                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 934                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 935
 936                 default: goto ignore;
 937                 }
 938                 break;
 939
 940         case HID_UP_DIGITIZER:
 941                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 942                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 943                 else if ((field->application & 0xff) == 0x02) /* Pen */
 944                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 945
 946                 switch (usage->hid & 0xff) {
 947                 case 0x00: /* Undefined */
 948                         goto ignore;
 949
 950                 case 0x30: /* TipPressure */
 951                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 952                                 device->quirks |= HID_QUIRK_NOTOUCH;
 953                                 set_bit(EV_KEY, input->evbit);
 954                                 set_bit(BTN_TOUCH, input->keybit);
 955                         }
 956                         map_abs_clear(ABS_PRESSURE);
 957                         break;
 958
 959                 case 0x32: /* InRange */
 960                         switch (field->physical) {
 961                         case HID_DG_PUCK:
 962                                 map_key(BTN_TOOL_MOUSE);
 963                                 break;
 964                         case HID_DG_FINGER:
 965                                 map_key(BTN_TOOL_FINGER);
 966                                 break;
 967                         default:
 968                                 /*
 969                                  * If the physical is not given,
 970                                  * rely on the application.
 971                                  */
 972                                 if (!field->physical) {
 973                                         switch (field->application) {
 974                                         case HID_DG_TOUCHSCREEN:
 975                                         case HID_DG_TOUCHPAD:
 976                                                 map_key_clear(BTN_TOOL_FINGER);
 977                                                 break;
 978                                         default:
 979                                                 map_key_clear(BTN_TOOL_PEN);
 980                                         }
 981                                 } else {
 982                                         map_key(BTN_TOOL_PEN);
 983                                 }
 984                                 break;
 985                         }
 986                         break;
 987
 988                 case 0x3b: /* Battery Strength */
 989                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
 990                         usage->type = EV_PWR;
 991                         return;
 992
 993                 case 0x3c: /* Invert */
 994                         device->quirks &= ~HID_QUIRK_NOINVERT;
 995                         map_key_clear(BTN_TOOL_RUBBER);
 996                         break;
 997
 998                 case 0x3d: /* X Tilt */
 999                         map_abs_clear(ABS_TILT_X);
1000                         break;
1001
1002                 case 0x3e: /* Y Tilt */
1003                         map_abs_clear(ABS_TILT_Y);
1004                         break;
1005
1006                 case 0x33: /* Touch */
1007                 case 0x42: /* TipSwitch */
1008                 case 0x43: /* TipSwitch2 */
1009                         device->quirks &= ~HID_QUIRK_NOTOUCH;
1010                         map_key_clear(BTN_TOUCH);
1011                         break;
1012
1013                 case 0x44: /* BarrelSwitch */
1014                         map_key_clear(BTN_STYLUS);
1015                         break;
1016
1017                 case 0x45: /* ERASER */
1018                         /*
1019                          * This event is reported when eraser tip touches the surface.
1020                          * Actual eraser (BTN_TOOL_RUBBER) is set and released either
1021                          * by Invert if tool reports proximity or by Eraser directly.
1022                          */
1023                         if (!test_bit(BTN_TOOL_RUBBER, input->keybit)) {
1024                                 device->quirks |= HID_QUIRK_NOINVERT;
1025                                 set_bit(BTN_TOOL_RUBBER, input->keybit);
1026                         }
1027                         map_key_clear(BTN_TOUCH);
1028                         break;
1029
1030                 case 0x46: /* TabletPick */
1031                 case 0x5a: /* SecondaryBarrelSwitch */
1032                         map_key_clear(BTN_STYLUS2);
1033                         break;
1034
1035                 case 0x5b: /* TransducerSerialNumber */
1036                 case 0x6e: /* TransducerSerialNumber2 */
1037                         map_msc(MSC_SERIAL);
1038                         break;
1039
1040                 default:  goto unknown;
1041                 }
1042                 break;
1043
1044         case HID_UP_TELEPHONY:
1045                 switch (usage->hid & HID_USAGE) {
1046                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
1047                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
1048                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
1049                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
1050                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
1051                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
1052                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
1053                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
1054                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
1055                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
1056                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
1057                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
1058                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
1059                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
1060                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
1061                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
1062                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
1063                 default: goto ignore;
1064                 }
1065                 break;
1066
1067         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
1068                 switch (usage->hid & HID_USAGE) {
1069                 case 0x000: goto ignore;
1070                 case 0x030: map_key_clear(KEY_POWER);           break;
1071                 case 0x031: map_key_clear(KEY_RESTART);         break;
1072                 case 0x032: map_key_clear(KEY_SLEEP);           break;
1073                 case 0x034: map_key_clear(KEY_SLEEP);           break;
1074                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1075                 case 0x036: map_key_clear(BTN_MISC);            break;
1076
1077                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
1078                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
1079                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
1080                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
1081                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
1082                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
1083                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
1084                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
1085                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
1086
1087                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
1088                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
1089                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
1090                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
1091                 case 0x069: map_key_clear(KEY_RED);             break;
1092                 case 0x06a: map_key_clear(KEY_GREEN);           break;
1093                 case 0x06b: map_key_clear(KEY_BLUE);            break;
1094                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
1095                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
1096
1097                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
1098                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
1099                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
1100                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
1101                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
1102                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
1103
1104                 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);    break;
1105                 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);   break;
1106                 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);    break;
1107
1108                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
1109                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
1110                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1111
1112                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
1113                 case 0x083: map_key_clear(KEY_LAST);            break;
1114                 case 0x084: map_key_clear(KEY_ENTER);           break;
1115                 case 0x088: map_key_clear(KEY_PC);              break;
1116                 case 0x089: map_key_clear(KEY_TV);              break;
1117                 case 0x08a: map_key_clear(KEY_WWW);             break;
1118                 case 0x08b: map_key_clear(KEY_DVD);             break;
1119                 case 0x08c: map_key_clear(KEY_PHONE);           break;
1120                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
1121                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
1122                 case 0x08f: map_key_clear(KEY_GAMES);           break;
1123                 case 0x090: map_key_clear(KEY_MEMO);            break;
1124                 case 0x091: map_key_clear(KEY_CD);              break;
1125                 case 0x092: map_key_clear(KEY_VCR);             break;
1126                 case 0x093: map_key_clear(KEY_TUNER);           break;
1127                 case 0x094: map_key_clear(KEY_EXIT);            break;
1128                 case 0x095: map_key_clear(KEY_HELP);            break;
1129                 case 0x096: map_key_clear(KEY_TAPE);            break;
1130                 case 0x097: map_key_clear(KEY_TV2);             break;
1131                 case 0x098: map_key_clear(KEY_SAT);             break;
1132                 case 0x09a: map_key_clear(KEY_PVR);             break;
1133
1134                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
1135                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
1136                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
1137
1138                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
1139                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
1140                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
1141                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
1142                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
1143                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
1144                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
1145                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
1146                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
1147                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
1148                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
1149                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
1150
1151                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
1152                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
1153
1154                 case 0x0d8: map_key_clear(KEY_DICTATE);         break;
1155                 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);    break;
1156
1157                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
1158                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
1159                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
1160                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
1161                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
1162                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
1163
1164                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
1165                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
1166                 case 0x183: map_key_clear(KEY_CONFIG);          break;
1167                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
1168                 case 0x185: map_key_clear(KEY_EDITOR);          break;
1169                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
1170                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
1171                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
1172                 case 0x189: map_key_clear(KEY_DATABASE);        break;
1173                 case 0x18a: map_key_clear(KEY_MAIL);            break;
1174                 case 0x18b: map_key_clear(KEY_NEWS);            break;
1175                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
1176                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
1177                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
1178                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
1179                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
1180                 case 0x191: map_key_clear(KEY_FINANCE);         break;
1181                 case 0x192: map_key_clear(KEY_CALC);            break;
1182                 case 0x193: map_key_clear(KEY_PLAYER);          break;
1183                 case 0x194: map_key_clear(KEY_FILE);            break;
1184                 case 0x196: map_key_clear(KEY_WWW);             break;
1185                 case 0x199: map_key_clear(KEY_CHAT);            break;
1186                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
1187                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
1188                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
1189                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1190                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1191                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1192                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1193                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1194                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1195                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1196                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1197                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1198                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1199                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1200                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1201                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1202                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1203                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1204                 case 0x201: map_key_clear(KEY_NEW);             break;
1205                 case 0x202: map_key_clear(KEY_OPEN);            break;
1206                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1207                 case 0x204: map_key_clear(KEY_EXIT);            break;
1208                 case 0x207: map_key_clear(KEY_SAVE);            break;
1209                 case 0x208: map_key_clear(KEY_PRINT);           break;
1210                 case 0x209: map_key_clear(KEY_PROPS);           break;
1211                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1212                 case 0x21b: map_key_clear(KEY_COPY);            break;
1213                 case 0x21c: map_key_clear(KEY_CUT);             break;
1214                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1215                 case 0x21f: map_key_clear(KEY_FIND);            break;
1216                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1217                 case 0x222: map_key_clear(KEY_GOTO);            break;
1218                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1219                 case 0x224: map_key_clear(KEY_BACK);            break;
1220                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1221                 case 0x226: map_key_clear(KEY_STOP);            break;
1222                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1223                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1224                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1225                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1226                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1227                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1228                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1229                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1230                 case 0x238: /* AC Pan */
1231                         set_bit(REL_HWHEEL, input->relbit);
1232                         map_rel(REL_HWHEEL_HI_RES);
1233                         break;
1234                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1235                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1236                 case 0x269: map_key_clear(KEY_INSERT);          break;
1237                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1238                 case 0x279: map_key_clear(KEY_REDO);            break;
1239
1240                 case 0x289: map_key_clear(KEY_REPLY);           break;
1241                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1242                 case 0x28c: map_key_clear(KEY_SEND);            break;
1243
1244                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1245
1246                 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1247
1248                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1249                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1250                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1251                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1252                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1253                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1254
1255                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1256
1257                 default: map_key_clear(KEY_UNKNOWN);
1258                 }
1259                 break;
1260
1261         case HID_UP_GENDEVCTRLS:
1262                 switch (usage->hid) {
1263                 case HID_DC_BATTERYSTRENGTH:
1264                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1265                         usage->type = EV_PWR;
1266                         return;
1267                 }
1268                 goto unknown;
1269
1270         case HID_UP_BATTERY:
1271                 switch (usage->hid) {
1272                 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1273                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1274                         usage->type = EV_PWR;
1275                         return;
1276                 case HID_BAT_CHARGING:
1277                         usage->type = EV_PWR;
1278                         return;
1279                 }
1280                 goto unknown;
1281         case HID_UP_CAMERA:
1282                 switch (usage->hid & HID_USAGE) {
1283                 case 0x020:
1284                         map_key_clear(KEY_CAMERA_FOCUS);        break;
1285                 case 0x021:
1286                         map_key_clear(KEY_CAMERA);              break;
1287                 default:
1288                         goto ignore;
1289                 }
1290                 break;
1291
1292         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1293                 set_bit(EV_REP, input->evbit);
1294                 switch (usage->hid & HID_USAGE) {
1295                 case 0x021: map_key_clear(KEY_PRINT);           break;
1296                 case 0x070: map_key_clear(KEY_HP);              break;
1297                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1298                 case 0x072: map_key_clear(KEY_SOUND);           break;
1299                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1300                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1301                 case 0x081: map_key_clear(KEY_CHAT);            break;
1302                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1303                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1304                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1305                 case 0x085: map_key_clear(KEY_SPORT);           break;
1306                 case 0x086: map_key_clear(KEY_SHOP);            break;
1307                 default:    goto ignore;
1308                 }
1309                 break;
1310
1311         case HID_UP_HPVENDOR2:
1312                 set_bit(EV_REP, input->evbit);
1313                 switch (usage->hid & HID_USAGE) {
1314                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1315                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1316                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1317                 default:    goto ignore;
1318                 }
1319                 break;
1320
1321         case HID_UP_MSVENDOR:
1322                 goto ignore;
1323
1324         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1325                 set_bit(EV_REP, input->evbit);
1326                 goto ignore;
1327
1328         case HID_UP_LOGIVENDOR:
1329                 /* intentional fallback */
1330         case HID_UP_LOGIVENDOR2:
1331                 /* intentional fallback */
1332         case HID_UP_LOGIVENDOR3:
1333                 goto ignore;
1334
1335         case HID_UP_PID:
1336                 switch (usage->hid & HID_USAGE) {
1337                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1338                 default: goto ignore;
1339                 }
1340                 break;
1341
1342         default:
1343         unknown:
1344                 if (field->report_size == 1) {
1345                         if (field->report->type == HID_OUTPUT_REPORT) {
1346                                 map_led(LED_MISC);
1347                                 break;
1348                         }
1349                         map_key(BTN_MISC);
1350                         break;
1351                 }
1352                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1353                         map_rel(REL_MISC);
1354                         break;
1355                 }
1356                 map_abs(ABS_MISC);
1357                 break;
1358         }
1359
1360 mapped:
1361         /* Mapping failed, bail out */
1362         if (!bit)
1363                 return;
1364
1365         if (device->driver->input_mapped &&
1366             device->driver->input_mapped(device, hidinput, field, usage,
1367                                          &bit, &max) < 0) {
1368                 /*
1369                  * The driver indicated that no further generic handling
1370                  * of the usage is desired.
1371                  */
1372                 return;
1373         }
1374
1375         set_bit(usage->type, input->evbit);
1376
1377         /*
1378          * This part is *really* controversial:
1379          * - HID aims at being generic so we should do our best to export
1380          *   all incoming events
1381          * - HID describes what events are, so there is no reason for ABS_X
1382          *   to be mapped to ABS_Y
1383          * - HID is using *_MISC+N as a default value, but nothing prevents
1384          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1385          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1386          *   processing)
1387          *
1388          * If devices still want to use this (at their own risk), they will
1389          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1390          * the default should be a reliable mapping.
1391          */
1392         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1393                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1394                         usage->code = find_next_zero_bit(bit,
1395                                                          max + 1,
1396                                                          usage->code);
1397                 } else {
1398                         device->status |= HID_STAT_DUP_DETECTED;
1399                         goto ignore;
1400                 }
1401         }
1402
1403         if (usage->code > max)
1404                 goto ignore;
1405
1406         if (usage->type == EV_ABS) {
1407
1408                 int a = field->logical_minimum;
1409                 int b = field->logical_maximum;
1410
1411                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1412                         a = field->logical_minimum = 0;
1413                         b = field->logical_maximum = 255;
1414                 }
1415
1416                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1417                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1418                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1419
1420                 input_abs_set_res(input, usage->code,
1421                                   hidinput_calc_abs_res(field, usage->code));
1422
1423                 /* use a larger default input buffer for MT devices */
1424                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1425                         input_set_events_per_packet(input, 60);
1426         }
1427
1428         if (usage->type == EV_ABS &&
1429             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1430                 int i;
1431                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1432                         input_set_abs_params(input, i, -1, 1, 0, 0);
1433                         set_bit(i, input->absbit);
1434                 }
1435                 if (usage->hat_dir && !field->dpad)
1436                         field->dpad = usage->code;
1437         }
1438
1439         /* for those devices which produce Consumer volume usage as relative,
1440          * we emulate pressing volumeup/volumedown appropriate number of times
1441          * in hidinput_hid_event()
1442          */
1443         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1444                         (usage->code == ABS_VOLUME)) {
1445                 set_bit(KEY_VOLUMEUP, input->keybit);
1446                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1447         }
1448
1449         if (usage->type == EV_KEY) {
1450                 set_bit(EV_MSC, input->evbit);
1451                 set_bit(MSC_SCAN, input->mscbit);
1452         }
1453
1454         return;
1455
1456 ignore:
1457         usage->type = 0;
1458         usage->code = 0;
1459 }
1460
1461 static void hidinput_handle_scroll(struct hid_usage *usage,
1462                                    struct input_dev *input,
1463                                    __s32 value)
1464 {
1465         int code;
1466         int hi_res, lo_res;
1467
1468         if (value == 0)
1469                 return;
1470
1471         if (usage->code == REL_WHEEL_HI_RES)
1472                 code = REL_WHEEL;
1473         else
1474                 code = REL_HWHEEL;
1475
1476         /*
1477          * Windows reports one wheel click as value 120. Where a high-res
1478          * scroll wheel is present, a fraction of 120 is reported instead.
1479          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1480          * adhere to the 120 expectation.
1481          */
1482         hi_res = value * 120/usage->resolution_multiplier;
1483
1484         usage->wheel_accumulated += hi_res;
1485         lo_res = usage->wheel_accumulated/120;
1486         if (lo_res)
1487                 usage->wheel_accumulated -= lo_res * 120;
1488
1489         input_event(input, EV_REL, code, lo_res);
1490         input_event(input, EV_REL, usage->code, hi_res);
1491 }
1492
1493 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1494                                     unsigned int tool)
1495 {
1496         /* if the given tool is not currently reported, ignore */
1497         if (!test_bit(tool, input->key))
1498                 return;
1499
1500         /*
1501          * if the given tool was previously set, release it,
1502          * release any TOUCH and send an EV_SYN
1503          */
1504         input_event(input, EV_KEY, BTN_TOUCH, 0);
1505         input_event(input, EV_KEY, tool, 0);
1506         input_event(input, EV_SYN, SYN_REPORT, 0);
1507
1508         report->tool = 0;
1509 }
1510
1511 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1512                                 unsigned int new_tool)
1513 {
1514         if (report->tool != new_tool)
1515                 hid_report_release_tool(report, input, report->tool);
1516
1517         input_event(input, EV_KEY, new_tool, 1);
1518         report->tool = new_tool;
1519 }
1520
1521 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1522 {
1523         struct input_dev *input;
1524         struct hid_report *report = field->report;
1525         unsigned *quirks = &hid->quirks;
1526
1527         if (!usage->type)
1528                 return;
1529
1530         if (usage->type == EV_PWR) {
1531                 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1532
1533                 if (!handled)
1534                         hidinput_update_battery(hid, value);
1535
1536                 return;
1537         }
1538
1539         if (!field->hidinput)
1540                 return;
1541
1542         input = field->hidinput->input;
1543
1544         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1545                 int hat_dir = usage->hat_dir;
1546                 if (!hat_dir)
1547                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1548                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1549                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1550                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1551                 return;
1552         }
1553
1554         /*
1555          * Ignore out-of-range values as per HID specification,
1556          * section 5.10 and 6.2.25, when NULL state bit is present.
1557          * When it's not, clamp the value to match Microsoft's input
1558          * driver as mentioned in "Required HID usages for digitizers":
1559          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1560          *
1561          * The logical_minimum < logical_maximum check is done so that we
1562          * don't unintentionally discard values sent by devices which
1563          * don't specify logical min and max.
1564          */
1565         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1566             field->logical_minimum < field->logical_maximum) {
1567                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1568                     (value < field->logical_minimum ||
1569                      value > field->logical_maximum)) {
1570                         dbg_hid("Ignoring out-of-range value %x\n", value);
1571                         return;
1572                 }
1573                 value = clamp(value,
1574                               field->logical_minimum,
1575                               field->logical_maximum);
1576         }
1577
1578         switch (usage->hid) {
1579         case HID_DG_ERASER:
1580                 report->tool_active |= !!value;
1581
1582                 /*
1583                  * if eraser is set, we must enforce BTN_TOOL_RUBBER
1584                  * to accommodate for devices not following the spec.
1585                  */
1586                 if (value)
1587                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1588                 else if (report->tool != BTN_TOOL_RUBBER)
1589                         /* value is off, tool is not rubber, ignore */
1590                         return;
1591                 else if (*quirks & HID_QUIRK_NOINVERT &&
1592                          !test_bit(BTN_TOUCH, input->key)) {
1593                         /*
1594                          * There is no invert to release the tool, let hid_input
1595                          * send BTN_TOUCH with scancode and release the tool after.
1596                          */
1597                         hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1598                         return;
1599                 }
1600
1601                 /* let hid-input set BTN_TOUCH */
1602                 break;
1603
1604         case HID_DG_INVERT:
1605                 report->tool_active |= !!value;
1606
1607                 /*
1608                  * If invert is set, we store BTN_TOOL_RUBBER.
1609                  */
1610                 if (value)
1611                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1612                 else if (!report->tool_active)
1613                         /* tool_active not set means Invert and Eraser are not set */
1614                         hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1615
1616                 /* no further processing */
1617                 return;
1618
1619         case HID_DG_INRANGE:
1620                 report->tool_active |= !!value;
1621
1622                 if (report->tool_active) {
1623                         /*
1624                          * if tool is not set but is marked as active,
1625                          * assume ours
1626                          */
1627                         if (!report->tool)
1628                                 report->tool = usage->code;
1629
1630                         /* drivers may have changed the value behind our back, resend it */
1631                         hid_report_set_tool(report, input, report->tool);
1632                 } else {
1633                         hid_report_release_tool(report, input, usage->code);
1634                 }
1635
1636                 /* reset tool_active for the next event */
1637                 report->tool_active = false;
1638
1639                 /* no further processing */
1640                 return;
1641
1642         case HID_DG_TIPSWITCH:
1643                 report->tool_active |= !!value;
1644
1645                 /* if tool is set to RUBBER we should ignore the current value */
1646                 if (report->tool == BTN_TOOL_RUBBER)
1647                         return;
1648
1649                 break;
1650
1651         case HID_DG_TIPPRESSURE:
1652                 if (*quirks & HID_QUIRK_NOTOUCH) {
1653                         int a = field->logical_minimum;
1654                         int b = field->logical_maximum;
1655
1656                         if (value > a + ((b - a) >> 3)) {
1657                                 input_event(input, EV_KEY, BTN_TOUCH, 1);
1658                                 report->tool_active = true;
1659                         }
1660                 }
1661                 break;
1662
1663         case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1664                 dbg_hid("Maximum Effects - %d\n",value);
1665                 return;
1666
1667         case HID_UP_PID | 0x7fUL:
1668                 dbg_hid("PID Pool Report\n");
1669                 return;
1670         }
1671
1672         switch (usage->type) {
1673         case EV_KEY:
1674                 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1675                         return;
1676                 break;
1677
1678         case EV_REL:
1679                 if (usage->code == REL_WHEEL_HI_RES ||
1680                     usage->code == REL_HWHEEL_HI_RES) {
1681                         hidinput_handle_scroll(usage, input, value);
1682                         return;
1683                 }
1684                 break;
1685
1686         case EV_ABS:
1687                 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1688                     usage->code == ABS_VOLUME) {
1689                         int count = abs(value);
1690                         int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1691                         int i;
1692
1693                         for (i = 0; i < count; i++) {
1694                                 input_event(input, EV_KEY, direction, 1);
1695                                 input_sync(input);
1696                                 input_event(input, EV_KEY, direction, 0);
1697                                 input_sync(input);
1698                         }
1699                         return;
1700
1701                 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1702                            ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1703                         value = field->logical_maximum - value;
1704                 break;
1705         }
1706
1707         /*
1708          * Ignore reports for absolute data if the data didn't change. This is
1709          * not only an optimization but also fixes 'dead' key reports. Some
1710          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1711          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1712          * can only have one of them physically available. The 'dead' keys
1713          * report constant 0. As all map to the same keycode, they'd confuse
1714          * the input layer. If we filter the 'dead' keys on the HID level, we
1715          * skip the keycode translation and only forward real events.
1716          */
1717         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1718                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1719                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1720             usage->usage_index < field->maxusage &&
1721             value == field->value[usage->usage_index])
1722                 return;
1723
1724         /* report the usage code as scancode if the key status has changed */
1725         if (usage->type == EV_KEY &&
1726             (!test_bit(usage->code, input->key)) == value)
1727                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1728
1729         input_event(input, usage->type, usage->code, value);
1730
1731         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1732             usage->type == EV_KEY && value) {
1733                 input_sync(input);
1734                 input_event(input, usage->type, usage->code, 0);
1735         }
1736 }
1737
1738 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1739 {
1740         struct hid_input *hidinput;
1741
1742         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1743                 return;
1744
1745         list_for_each_entry(hidinput, &hid->inputs, list)
1746                 input_sync(hidinput->input);
1747 }
1748 EXPORT_SYMBOL_GPL(hidinput_report_event);
1749
1750 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1751                                unsigned int code, struct hid_field **field)
1752 {
1753         struct hid_report *report;
1754         int i, j;
1755
1756         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1757                 for (i = 0; i < report->maxfield; i++) {
1758                         *field = report->field[i];
1759                         for (j = 0; j < (*field)->maxusage; j++)
1760                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1761                                         return j;
1762                 }
1763         }
1764         return -1;
1765 }
1766
1767 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1768 {
1769         struct hid_report *report;
1770         struct hid_field *field;
1771         int i, j;
1772
1773         list_for_each_entry(report,
1774                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1775                             list) {
1776                 for (i = 0; i < report->maxfield; i++) {
1777                         field = report->field[i];
1778                         for (j = 0; j < field->maxusage; j++)
1779                                 if (field->usage[j].type == EV_LED)
1780                                         return field;
1781                 }
1782         }
1783         return NULL;
1784 }
1785 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1786
1787 unsigned int hidinput_count_leds(struct hid_device *hid)
1788 {
1789         struct hid_report *report;
1790         struct hid_field *field;
1791         int i, j;
1792         unsigned int count = 0;
1793
1794         list_for_each_entry(report,
1795                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1796                             list) {
1797                 for (i = 0; i < report->maxfield; i++) {
1798                         field = report->field[i];
1799                         for (j = 0; j < field->maxusage; j++)
1800                                 if (field->usage[j].type == EV_LED &&
1801                                     field->value[j])
1802                                         count += 1;
1803                 }
1804         }
1805         return count;
1806 }
1807 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1808
1809 static void hidinput_led_worker(struct work_struct *work)
1810 {
1811         struct hid_device *hid = container_of(work, struct hid_device,
1812                                               led_work);
1813         struct hid_field *field;
1814         struct hid_report *report;
1815         int ret;
1816         u32 len;
1817         __u8 *buf;
1818
1819         field = hidinput_get_led_field(hid);
1820         if (!field)
1821                 return;
1822
1823         /*
1824          * field->report is accessed unlocked regarding HID core. So there might
1825          * be another incoming SET-LED request from user-space, which changes
1826          * the LED state while we assemble our outgoing buffer. However, this
1827          * doesn't matter as hid_output_report() correctly converts it into a
1828          * boolean value no matter what information is currently set on the LED
1829          * field (even garbage). So the remote device will always get a valid
1830          * request.
1831          * And in case we send a wrong value, a next led worker is spawned
1832          * for every SET-LED request so the following worker will send the
1833          * correct value, guaranteed!
1834          */
1835
1836         report = field->report;
1837
1838         /* use custom SET_REPORT request if possible (asynchronous) */
1839         if (hid->ll_driver->request)
1840                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1841
1842         /* fall back to generic raw-output-report */
1843         len = hid_report_len(report);
1844         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1845         if (!buf)
1846                 return;
1847
1848         hid_output_report(report, buf);
1849         /* synchronous output report */
1850         ret = hid_hw_output_report(hid, buf, len);
1851         if (ret == -ENOSYS)
1852                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1853                                 HID_REQ_SET_REPORT);
1854         kfree(buf);
1855 }
1856
1857 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1858                                 unsigned int code, int value)
1859 {
1860         struct hid_device *hid = input_get_drvdata(dev);
1861         struct hid_field *field;
1862         int offset;
1863
1864         if (type == EV_FF)
1865                 return input_ff_event(dev, type, code, value);
1866
1867         if (type != EV_LED)
1868                 return -1;
1869
1870         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1871                 hid_warn(dev, "event field not found\n");
1872                 return -1;
1873         }
1874
1875         hid_set_field(field, offset, value);
1876
1877         schedule_work(&hid->led_work);
1878         return 0;
1879 }
1880
1881 static int hidinput_open(struct input_dev *dev)
1882 {
1883         struct hid_device *hid = input_get_drvdata(dev);
1884
1885         return hid_hw_open(hid);
1886 }
1887
1888 static void hidinput_close(struct input_dev *dev)
1889 {
1890         struct hid_device *hid = input_get_drvdata(dev);
1891
1892         hid_hw_close(hid);
1893 }
1894
1895 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1896                 struct hid_report *report, bool use_logical_max)
1897 {
1898         struct hid_usage *usage;
1899         bool update_needed = false;
1900         bool get_report_completed = false;
1901         int i, j;
1902
1903         if (report->maxfield == 0)
1904                 return false;
1905
1906         for (i = 0; i < report->maxfield; i++) {
1907                 __s32 value = use_logical_max ?
1908                               report->field[i]->logical_maximum :
1909                               report->field[i]->logical_minimum;
1910
1911                 /* There is no good reason for a Resolution
1912                  * Multiplier to have a count other than 1.
1913                  * Ignore that case.
1914                  */
1915                 if (report->field[i]->report_count != 1)
1916                         continue;
1917
1918                 for (j = 0; j < report->field[i]->maxusage; j++) {
1919                         usage = &report->field[i]->usage[j];
1920
1921                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1922                                 continue;
1923
1924                         /*
1925                          * If we have more than one feature within this
1926                          * report we need to fill in the bits from the
1927                          * others before we can overwrite the ones for the
1928                          * Resolution Multiplier.
1929                          *
1930                          * But if we're not allowed to read from the device,
1931                          * we just bail. Such a device should not exist
1932                          * anyway.
1933                          */
1934                         if (!get_report_completed && report->maxfield > 1) {
1935                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1936                                         return update_needed;
1937
1938                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1939                                 hid_hw_wait(hid);
1940                                 get_report_completed = true;
1941                         }
1942
1943                         report->field[i]->value[j] = value;
1944                         update_needed = true;
1945                 }
1946         }
1947
1948         return update_needed;
1949 }
1950
1951 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1952 {
1953         struct hid_report_enum *rep_enum;
1954         struct hid_report *rep;
1955         int ret;
1956
1957         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1958         list_for_each_entry(rep, &rep_enum->report_list, list) {
1959                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1960                                                                      rep, true);
1961
1962                 if (update_needed) {
1963                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1964                         if (ret) {
1965                                 __hidinput_change_resolution_multipliers(hid,
1966                                                                     rep, false);
1967                                 return;
1968                         }
1969                 }
1970         }
1971
1972         /* refresh our structs */
1973         hid_setup_resolution_multiplier(hid);
1974 }
1975
1976 static void report_features(struct hid_device *hid)
1977 {
1978         struct hid_driver *drv = hid->driver;
1979         struct hid_report_enum *rep_enum;
1980         struct hid_report *rep;
1981         struct hid_usage *usage;
1982         int i, j;
1983
1984         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1985         list_for_each_entry(rep, &rep_enum->report_list, list)
1986                 for (i = 0; i < rep->maxfield; i++) {
1987                         /* Ignore if report count is out of bounds. */
1988                         if (rep->field[i]->report_count < 1)
1989                                 continue;
1990
1991                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1992                                 usage = &rep->field[i]->usage[j];
1993
1994                                 /* Verify if Battery Strength feature is available */
1995                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1996                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1997                                                                rep->field[i], false);
1998
1999                                 if (drv->feature_mapping)
2000                                         drv->feature_mapping(hid, rep->field[i], usage);
2001                         }
2002                 }
2003 }
2004
2005 static struct hid_input *hidinput_allocate(struct hid_device *hid,
2006                                            unsigned int application)
2007 {
2008         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
2009         struct input_dev *input_dev = input_allocate_device();
2010         const char *suffix = NULL;
2011         size_t suffix_len, name_len;
2012
2013         if (!hidinput || !input_dev)
2014                 goto fail;
2015
2016         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2017             hid->maxapplication > 1) {
2018                 switch (application) {
2019                 case HID_GD_KEYBOARD:
2020                         suffix = "Keyboard";
2021                         break;
2022                 case HID_GD_KEYPAD:
2023                         suffix = "Keypad";
2024                         break;
2025                 case HID_GD_MOUSE:
2026                         suffix = "Mouse";
2027                         break;
2028                 case HID_DG_PEN:
2029                         /*
2030                          * yes, there is an issue here:
2031                          *  DG_PEN -> "Stylus"
2032                          *  DG_STYLUS -> "Pen"
2033                          * But changing this now means users with config snippets
2034                          * will have to change it and the test suite will not be happy.
2035                          */
2036                         suffix = "Stylus";
2037                         break;
2038                 case HID_DG_STYLUS:
2039                         suffix = "Pen";
2040                         break;
2041                 case HID_DG_TOUCHSCREEN:
2042                         suffix = "Touchscreen";
2043                         break;
2044                 case HID_DG_TOUCHPAD:
2045                         suffix = "Touchpad";
2046                         break;
2047                 case HID_GD_SYSTEM_CONTROL:
2048                         suffix = "System Control";
2049                         break;
2050                 case HID_CP_CONSUMER_CONTROL:
2051                         suffix = "Consumer Control";
2052                         break;
2053                 case HID_GD_WIRELESS_RADIO_CTLS:
2054                         suffix = "Wireless Radio Control";
2055                         break;
2056                 case HID_GD_SYSTEM_MULTIAXIS:
2057                         suffix = "System Multi Axis";
2058                         break;
2059                 default:
2060                         break;
2061                 }
2062         }
2063
2064         if (suffix) {
2065                 name_len = strlen(hid->name);
2066                 suffix_len = strlen(suffix);
2067                 if ((name_len < suffix_len) ||
2068                     strcmp(hid->name + name_len - suffix_len, suffix)) {
2069                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2070                                                    hid->name, suffix);
2071                         if (!hidinput->name)
2072                                 goto fail;
2073                 }
2074         }
2075
2076         input_set_drvdata(input_dev, hid);
2077         input_dev->event = hidinput_input_event;
2078         input_dev->open = hidinput_open;
2079         input_dev->close = hidinput_close;
2080         input_dev->setkeycode = hidinput_setkeycode;
2081         input_dev->getkeycode = hidinput_getkeycode;
2082
2083         input_dev->name = hidinput->name ? hidinput->name : hid->name;
2084         input_dev->phys = hid->phys;
2085         input_dev->uniq = hid->uniq;
2086         input_dev->id.bustype = hid->bus;
2087         input_dev->id.vendor  = hid->vendor;
2088         input_dev->id.product = hid->product;
2089         input_dev->id.version = hid->version;
2090         input_dev->dev.parent = &hid->dev;
2091
2092         hidinput->input = input_dev;
2093         hidinput->application = application;
2094         list_add_tail(&hidinput->list, &hid->inputs);
2095
2096         INIT_LIST_HEAD(&hidinput->reports);
2097
2098         return hidinput;
2099
2100 fail:
2101         kfree(hidinput);
2102         input_free_device(input_dev);
2103         hid_err(hid, "Out of memory during hid input probe\n");
2104         return NULL;
2105 }
2106
2107 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2108 {
2109         int i;
2110         unsigned long r = 0;
2111
2112         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2113                 r |= hidinput->input->evbit[i];
2114
2115         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2116                 r |= hidinput->input->keybit[i];
2117
2118         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2119                 r |= hidinput->input->relbit[i];
2120
2121         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2122                 r |= hidinput->input->absbit[i];
2123
2124         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2125                 r |= hidinput->input->mscbit[i];
2126
2127         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2128                 r |= hidinput->input->ledbit[i];
2129
2130         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2131                 r |= hidinput->input->sndbit[i];
2132
2133         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2134                 r |= hidinput->input->ffbit[i];
2135
2136         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2137                 r |= hidinput->input->swbit[i];
2138
2139         return !!r;
2140 }
2141
2142 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2143                 struct hid_input *hidinput)
2144 {
2145         struct hid_report *report;
2146         int i, k;
2147
2148         list_del(&hidinput->list);
2149         input_free_device(hidinput->input);
2150         kfree(hidinput->name);
2151
2152         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2153                 if (k == HID_OUTPUT_REPORT &&
2154                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2155                         continue;
2156
2157                 list_for_each_entry(report, &hid->report_enum[k].report_list,
2158                                     list) {
2159
2160                         for (i = 0; i < report->maxfield; i++)
2161                                 if (report->field[i]->hidinput == hidinput)
2162                                         report->field[i]->hidinput = NULL;
2163                 }
2164         }
2165
2166         kfree(hidinput);
2167 }
2168
2169 static struct hid_input *hidinput_match(struct hid_report *report)
2170 {
2171         struct hid_device *hid = report->device;
2172         struct hid_input *hidinput;
2173
2174         list_for_each_entry(hidinput, &hid->inputs, list) {
2175                 if (hidinput->report &&
2176                     hidinput->report->id == report->id)
2177                         return hidinput;
2178         }
2179
2180         return NULL;
2181 }
2182
2183 static struct hid_input *hidinput_match_application(struct hid_report *report)
2184 {
2185         struct hid_device *hid = report->device;
2186         struct hid_input *hidinput;
2187
2188         list_for_each_entry(hidinput, &hid->inputs, list) {
2189                 if (hidinput->application == report->application)
2190                         return hidinput;
2191
2192                 /*
2193                  * Keep SystemControl and ConsumerControl applications together
2194                  * with the main keyboard, if present.
2195                  */
2196                 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2197                      report->application == HID_CP_CONSUMER_CONTROL) &&
2198                     hidinput->application == HID_GD_KEYBOARD) {
2199                         return hidinput;
2200                 }
2201         }
2202
2203         return NULL;
2204 }
2205
2206 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2207                                              struct hid_report *report)
2208 {
2209         int i, j, k;
2210         int first_field_index = 0;
2211         int slot_collection_index = -1;
2212         int prev_collection_index = -1;
2213         unsigned int slot_idx = 0;
2214         struct hid_field *field;
2215
2216         /*
2217          * First tag all the fields that are part of a slot,
2218          * a slot needs to have one Contact ID in the collection
2219          */
2220         for (i = 0; i < report->maxfield; i++) {
2221                 field = report->field[i];
2222
2223                 /* ignore fields without usage */
2224                 if (field->maxusage < 1)
2225                         continue;
2226
2227                 /*
2228                  * janitoring when collection_index changes
2229                  */
2230                 if (prev_collection_index != field->usage->collection_index) {
2231                         prev_collection_index = field->usage->collection_index;
2232                         first_field_index = i;
2233                 }
2234
2235                 /*
2236                  * if we already found a Contact ID in the collection,
2237                  * tag and continue to the next.
2238                  */
2239                 if (slot_collection_index == field->usage->collection_index) {
2240                         field->slot_idx = slot_idx;
2241                         continue;
2242                 }
2243
2244                 /* check if the current field has Contact ID */
2245                 for (j = 0; j < field->maxusage; j++) {
2246                         if (field->usage[j].hid == HID_DG_CONTACTID) {
2247                                 slot_collection_index = field->usage->collection_index;
2248                                 slot_idx++;
2249
2250                                 /*
2251                                  * mark all previous fields and this one in the
2252                                  * current collection to be slotted.
2253                                  */
2254                                 for (k = first_field_index; k <= i; k++)
2255                                         report->field[k]->slot_idx = slot_idx;
2256                                 break;
2257                         }
2258                 }
2259         }
2260
2261         for (i = 0; i < report->maxfield; i++)
2262                 for (j = 0; j < report->field[i]->maxusage; j++)
2263                         hidinput_configure_usage(hidinput, report->field[i],
2264                                                  report->field[i]->usage + j,
2265                                                  j);
2266 }
2267
2268 /*
2269  * Register the input device; print a message.
2270  * Configure the input layer interface
2271  * Read all reports and initialize the absolute field values.
2272  */
2273
2274 int hidinput_connect(struct hid_device *hid, unsigned int force)
2275 {
2276         struct hid_driver *drv = hid->driver;
2277         struct hid_report *report;
2278         struct hid_input *next, *hidinput = NULL;
2279         unsigned int application;
2280         int i, k;
2281
2282         INIT_LIST_HEAD(&hid->inputs);
2283         INIT_WORK(&hid->led_work, hidinput_led_worker);
2284
2285         hid->status &= ~HID_STAT_DUP_DETECTED;
2286
2287         if (!force) {
2288                 for (i = 0; i < hid->maxcollection; i++) {
2289                         struct hid_collection *col = &hid->collection[i];
2290                         if (col->type == HID_COLLECTION_APPLICATION ||
2291                                         col->type == HID_COLLECTION_PHYSICAL)
2292                                 if (IS_INPUT_APPLICATION(col->usage))
2293                                         break;
2294                 }
2295
2296                 if (i == hid->maxcollection)
2297                         return -1;
2298         }
2299
2300         report_features(hid);
2301
2302         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2303                 if (k == HID_OUTPUT_REPORT &&
2304                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2305                         continue;
2306
2307                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2308
2309                         if (!report->maxfield)
2310                                 continue;
2311
2312                         application = report->application;
2313
2314                         /*
2315                          * Find the previous hidinput report attached
2316                          * to this report id.
2317                          */
2318                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2319                                 hidinput = hidinput_match(report);
2320                         else if (hid->maxapplication > 1 &&
2321                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2322                                 hidinput = hidinput_match_application(report);
2323
2324                         if (!hidinput) {
2325                                 hidinput = hidinput_allocate(hid, application);
2326                                 if (!hidinput)
2327                                         goto out_unwind;
2328                         }
2329
2330                         hidinput_configure_usages(hidinput, report);
2331
2332                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2333                                 hidinput->report = report;
2334
2335                         list_add_tail(&report->hidinput_list,
2336                                       &hidinput->reports);
2337                 }
2338         }
2339
2340         hidinput_change_resolution_multipliers(hid);
2341
2342         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2343                 if (drv->input_configured &&
2344                     drv->input_configured(hid, hidinput))
2345                         goto out_unwind;
2346
2347                 if (!hidinput_has_been_populated(hidinput)) {
2348                         /* no need to register an input device not populated */
2349                         hidinput_cleanup_hidinput(hid, hidinput);
2350                         continue;
2351                 }
2352
2353                 if (input_register_device(hidinput->input))
2354                         goto out_unwind;
2355                 hidinput->registered = true;
2356         }
2357
2358         if (list_empty(&hid->inputs)) {
2359                 hid_err(hid, "No inputs registered, leaving\n");
2360                 goto out_unwind;
2361         }
2362
2363         if (hid->status & HID_STAT_DUP_DETECTED)
2364                 hid_dbg(hid,
2365                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2366
2367         return 0;
2368
2369 out_unwind:
2370         /* unwind the ones we already registered */
2371         hidinput_disconnect(hid);
2372
2373         return -1;
2374 }
2375 EXPORT_SYMBOL_GPL(hidinput_connect);
2376
2377 void hidinput_disconnect(struct hid_device *hid)
2378 {
2379         struct hid_input *hidinput, *next;
2380
2381         hidinput_cleanup_battery(hid);
2382
2383         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2384                 list_del(&hidinput->list);
2385                 if (hidinput->registered)
2386                         input_unregister_device(hidinput->input);
2387                 else
2388                         input_free_device(hidinput->input);
2389                 kfree(hidinput->name);
2390                 kfree(hidinput);
2391         }
2392
2393         /* led_work is spawned by input_dev callbacks, but doesn't access the
2394          * parent input_dev at all. Once all input devices are removed, we
2395          * know that led_work will never get restarted, so we can cancel it
2396          * synchronously and are safe. */
2397         cancel_work_sync(&hid->led_work);
2398 }
2399 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2400
2401 #ifdef CONFIG_HID_KUNIT_TEST
2402 #include "hid-input-test.c"
2403 #endif