drivers/hid/hid-input.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2000-2001 Vojtech Pavlik
   4  *  Copyright (c) 2006-2010 Jiri Kosina
   5  *
   6  *  HID to Linux Input mapping
   7  */
   8
   9 /*
  10  *
  11  * Should you need to contact me, the author, you can do so either by
  12  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  13  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/slab.h>
  18 #include <linux/kernel.h>
  19
  20 #include <linux/hid.h>
  21 #include <linux/hid-debug.h>
  22
  23 #include "hid-ids.h"
  24
  25 #define unk     KEY_UNKNOWN
  26
  27 static const unsigned char hid_keyboard[256] = {
  28           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  29          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  30           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  31          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  32          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  33         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  34          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  35         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  36         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  37         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,
  38         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  39         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  40         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  41         unk,unk,unk,unk,unk,unk,unk,unk,111,unk,unk,unk,unk,unk,unk,unk,
  42          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  43         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  44 };
  45
  46 static const struct {
  47         __s32 x;
  48         __s32 y;
  49 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  50
  51 struct usage_priority {
  52         __u32 usage;                    /* the HID usage associated */
  53         bool global;                    /* we assume all usages to be slotted,
  54                                          * unless global
  55                                          */
  56         unsigned int slot_overwrite;    /* for globals: allows to set the usage
  57                                          * before or after the slots
  58                                          */
  59 };
  60
  61 /*
  62  * hid-input will convert this list into priorities:
  63  * the first element will have the highest priority
  64  * (the length of the following array) and the last
  65  * element the lowest (1).
  66  *
  67  * hid-input will then shift the priority by 8 bits to leave some space
  68  * in case drivers want to interleave other fields.
  69  *
  70  * To accommodate slotted devices, the slot priority is
  71  * defined in the next 8 bits (defined by 0xff - slot).
  72  *
  73  * If drivers want to add fields before those, hid-input will
  74  * leave out the first 8 bits of the priority value.
  75  *
  76  * This still leaves us 65535 individual priority values.
  77  */
  78 static const struct usage_priority hidinput_usages_priorities[] = {
  79         { /* Eraser (eraser touching) must always come before tipswitch */
  80           .usage = HID_DG_ERASER,
  81         },
  82         { /* Invert must always come before In Range */
  83           .usage = HID_DG_INVERT,
  84         },
  85         { /* Is the tip of the tool touching? */
  86           .usage = HID_DG_TIPSWITCH,
  87         },
  88         { /* Tip Pressure might emulate tip switch */
  89           .usage = HID_DG_TIPPRESSURE,
  90         },
  91         { /* In Range needs to come after the other tool states */
  92           .usage = HID_DG_INRANGE,
  93         },
  94 };
  95
  96 #define map_abs(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
  97 #define map_rel(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
  98 #define map_key(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
  99 #define map_led(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))
 100 #define map_msc(c)      hid_map_usage(hidinput, usage, &bit, &max, EV_MSC, (c))
 101
 102 #define map_abs_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
 103                 &max, EV_ABS, (c))
 104 #define map_key_clear(c)        hid_map_usage_clear(hidinput, usage, &bit, \
 105                 &max, EV_KEY, (c))
 106
 107 static bool match_scancode(struct hid_usage *usage,
 108                            unsigned int cur_idx, unsigned int scancode)
 109 {
 110         return (usage->hid & (HID_USAGE_PAGE | HID_USAGE)) == scancode;
 111 }
 112
 113 static bool match_keycode(struct hid_usage *usage,
 114                           unsigned int cur_idx, unsigned int keycode)
 115 {
 116         /*
 117          * We should exclude unmapped usages when doing lookup by keycode.
 118          */
 119         return (usage->type == EV_KEY && usage->code == keycode);
 120 }
 121
 122 static bool match_index(struct hid_usage *usage,
 123                         unsigned int cur_idx, unsigned int idx)
 124 {
 125         return cur_idx == idx;
 126 }
 127
 128 typedef bool (*hid_usage_cmp_t)(struct hid_usage *usage,
 129                                 unsigned int cur_idx, unsigned int val);
 130
 131 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
 132                                            hid_usage_cmp_t match,
 133                                            unsigned int value,
 134                                            unsigned int *usage_idx)
 135 {
 136         unsigned int i, j, k, cur_idx = 0;
 137         struct hid_report *report;
 138         struct hid_usage *usage;
 139
 140         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 141                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 142                         for (i = 0; i < report->maxfield; i++) {
 143                                 for (j = 0; j < report->field[i]->maxusage; j++) {
 144                                         usage = report->field[i]->usage + j;
 145                                         if (usage->type == EV_KEY || usage->type == 0) {
 146                                                 if (match(usage, cur_idx, value)) {
 147                                                         if (usage_idx)
 148                                                                 *usage_idx = cur_idx;
 149                                                         return usage;
 150                                                 }
 151                                                 cur_idx++;
 152                                         }
 153                                 }
 154                         }
 155                 }
 156         }
 157         return NULL;
 158 }
 159
 160 static struct hid_usage *hidinput_locate_usage(struct hid_device *hid,
 161                                         const struct input_keymap_entry *ke,
 162                                         unsigned int *index)
 163 {
 164         struct hid_usage *usage;
 165         unsigned int scancode;
 166
 167         if (ke->flags & INPUT_KEYMAP_BY_INDEX)
 168                 usage = hidinput_find_key(hid, match_index, ke->index, index);
 169         else if (input_scancode_to_scalar(ke, &scancode) == 0)
 170                 usage = hidinput_find_key(hid, match_scancode, scancode, index);
 171         else
 172                 usage = NULL;
 173
 174         return usage;
 175 }
 176
 177 static int hidinput_getkeycode(struct input_dev *dev,
 178                                struct input_keymap_entry *ke)
 179 {
 180         struct hid_device *hid = input_get_drvdata(dev);
 181         struct hid_usage *usage;
 182         unsigned int scancode, index;
 183
 184         usage = hidinput_locate_usage(hid, ke, &index);
 185         if (usage) {
 186                 ke->keycode = usage->type == EV_KEY ?
 187                                 usage->code : KEY_RESERVED;
 188                 ke->index = index;
 189                 scancode = usage->hid & (HID_USAGE_PAGE | HID_USAGE);
 190                 ke->len = sizeof(scancode);
 191                 memcpy(ke->scancode, &scancode, sizeof(scancode));
 192                 return 0;
 193         }
 194
 195         return -EINVAL;
 196 }
 197
 198 static int hidinput_setkeycode(struct input_dev *dev,
 199                                const struct input_keymap_entry *ke,
 200                                unsigned int *old_keycode)
 201 {
 202         struct hid_device *hid = input_get_drvdata(dev);
 203         struct hid_usage *usage;
 204
 205         usage = hidinput_locate_usage(hid, ke, NULL);
 206         if (usage) {
 207                 *old_keycode = usage->type == EV_KEY ?
 208                                 usage->code : KEY_RESERVED;
 209                 usage->type = EV_KEY;
 210                 usage->code = ke->keycode;
 211
 212                 clear_bit(*old_keycode, dev->keybit);
 213                 set_bit(usage->code, dev->keybit);
 214                 dbg_hid("Assigned keycode %d to HID usage code %x\n",
 215                         usage->code, usage->hid);
 216
 217                 /*
 218                  * Set the keybit for the old keycode if the old keycode is used
 219                  * by another key
 220                  */
 221                 if (hidinput_find_key(hid, match_keycode, *old_keycode, NULL))
 222                         set_bit(*old_keycode, dev->keybit);
 223
 224                 return 0;
 225         }
 226
 227         return -EINVAL;
 228 }
 229
 230
 231 /**
 232  * hidinput_calc_abs_res - calculate an absolute axis resolution
 233  * @field: the HID report field to calculate resolution for
 234  * @code: axis code
 235  *
 236  * The formula is:
 237  *                         (logical_maximum - logical_minimum)
 238  * resolution = ----------------------------------------------------------
 239  *              (physical_maximum - physical_minimum) * 10 ^ unit_exponent
 240  *
 241  * as seen in the HID specification v1.11 6.2.2.7 Global Items.
 242  *
 243  * Only exponent 1 length units are processed. Centimeters and inches are
 244  * converted to millimeters. Degrees are converted to radians.
 245  */
 246 __s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code)
 247 {
 248         __s32 unit_exponent = field->unit_exponent;
 249         __s32 logical_extents = field->logical_maximum -
 250                                         field->logical_minimum;
 251         __s32 physical_extents = field->physical_maximum -
 252                                         field->physical_minimum;
 253         __s32 prev;
 254
 255         /* Check if the extents are sane */
 256         if (logical_extents <= 0 || physical_extents <= 0)
 257                 return 0;
 258
 259         /*
 260          * Verify and convert units.
 261          * See HID specification v1.11 6.2.2.7 Global Items for unit decoding
 262          */
 263         switch (code) {
 264         case ABS_X:
 265         case ABS_Y:
 266         case ABS_Z:
 267         case ABS_MT_POSITION_X:
 268         case ABS_MT_POSITION_Y:
 269         case ABS_MT_TOOL_X:
 270         case ABS_MT_TOOL_Y:
 271         case ABS_MT_TOUCH_MAJOR:
 272         case ABS_MT_TOUCH_MINOR:
 273                 if (field->unit == 0x11) {              /* If centimeters */
 274                         /* Convert to millimeters */
 275                         unit_exponent += 1;
 276                 } else if (field->unit == 0x13) {       /* If inches */
 277                         /* Convert to millimeters */
 278                         prev = physical_extents;
 279                         physical_extents *= 254;
 280                         if (physical_extents < prev)
 281                                 return 0;
 282                         unit_exponent -= 1;
 283                 } else {
 284                         return 0;
 285                 }
 286                 break;
 287
 288         case ABS_RX:
 289         case ABS_RY:
 290         case ABS_RZ:
 291         case ABS_WHEEL:
 292         case ABS_TILT_X:
 293         case ABS_TILT_Y:
 294                 if (field->unit == 0x14) {              /* If degrees */
 295                         /* Convert to radians */
 296                         prev = logical_extents;
 297                         logical_extents *= 573;
 298                         if (logical_extents < prev)
 299                                 return 0;
 300                         unit_exponent += 1;
 301                 } else if (field->unit != 0x12) {       /* If not radians */
 302                         return 0;
 303                 }
 304                 break;
 305
 306         default:
 307                 return 0;
 308         }
 309
 310         /* Apply negative unit exponent */
 311         for (; unit_exponent < 0; unit_exponent++) {
 312                 prev = logical_extents;
 313                 logical_extents *= 10;
 314                 if (logical_extents < prev)
 315                         return 0;
 316         }
 317         /* Apply positive unit exponent */
 318         for (; unit_exponent > 0; unit_exponent--) {
 319                 prev = physical_extents;
 320                 physical_extents *= 10;
 321                 if (physical_extents < prev)
 322                         return 0;
 323         }
 324
 325         /* Calculate resolution */
 326         return DIV_ROUND_CLOSEST(logical_extents, physical_extents);
 327 }
 328 EXPORT_SYMBOL_GPL(hidinput_calc_abs_res);
 329
 330 #ifdef CONFIG_HID_BATTERY_STRENGTH
 331 static enum power_supply_property hidinput_battery_props[] = {
 332         POWER_SUPPLY_PROP_PRESENT,
 333         POWER_SUPPLY_PROP_ONLINE,
 334         POWER_SUPPLY_PROP_CAPACITY,
 335         POWER_SUPPLY_PROP_MODEL_NAME,
 336         POWER_SUPPLY_PROP_STATUS,
 337         POWER_SUPPLY_PROP_SCOPE,
 338 };
 339
 340 #define HID_BATTERY_QUIRK_PERCENT       (1 << 0) /* always reports percent */
 341 #define HID_BATTERY_QUIRK_FEATURE       (1 << 1) /* ask for feature report */
 342 #define HID_BATTERY_QUIRK_IGNORE        (1 << 2) /* completely ignore the battery */
 343 #define HID_BATTERY_QUIRK_AVOID_QUERY   (1 << 3) /* do not query the battery */
 344
 345 static const struct hid_device_id hid_battery_quirks[] = {
 346         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 347                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ISO),
 348           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 349         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 350                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2009_ANSI),
 351           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 352         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 353                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ANSI),
 354           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 355         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 356                                USB_DEVICE_ID_APPLE_ALU_WIRELESS_2011_ISO),
 357           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 358         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE,
 359                 USB_DEVICE_ID_APPLE_ALU_WIRELESS_ANSI),
 360           HID_BATTERY_QUIRK_PERCENT | HID_BATTERY_QUIRK_FEATURE },
 361         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM,
 362                 USB_DEVICE_ID_ELECOM_BM084),
 363           HID_BATTERY_QUIRK_IGNORE },
 364         { HID_USB_DEVICE(USB_VENDOR_ID_SYMBOL,
 365                 USB_DEVICE_ID_SYMBOL_SCANNER_3),
 366           HID_BATTERY_QUIRK_IGNORE },
 367         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ASUSTEK,
 368                 USB_DEVICE_ID_ASUSTEK_T100CHI_KEYBOARD),
 369           HID_BATTERY_QUIRK_IGNORE },
 370         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 371                 USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 372           HID_BATTERY_QUIRK_IGNORE },
 373         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN),
 374           HID_BATTERY_QUIRK_IGNORE },
 375         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_ASUS_GV301RA_TOUCHSCREEN),
 376           HID_BATTERY_QUIRK_IGNORE },
 377         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
 378           HID_BATTERY_QUIRK_IGNORE },
 379         { HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN),
 380           HID_BATTERY_QUIRK_IGNORE },
 381         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_L),
 382           HID_BATTERY_QUIRK_AVOID_QUERY },
 383         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_MW),
 384           HID_BATTERY_QUIRK_AVOID_QUERY },
 385         { HID_USB_DEVICE(USB_VENDOR_ID_UGEE, USB_DEVICE_ID_UGEE_XPPEN_TABLET_DECO_PRO_SW),
 386           HID_BATTERY_QUIRK_AVOID_QUERY },
 387         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15),
 388           HID_BATTERY_QUIRK_IGNORE },
 389         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100),
 390           HID_BATTERY_QUIRK_IGNORE },
 391         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_ENVY_X360_EU0009NV),
 392           HID_BATTERY_QUIRK_IGNORE },
 393         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_15),
 394           HID_BATTERY_QUIRK_IGNORE },
 395         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13_AW0020NG),
 396           HID_BATTERY_QUIRK_IGNORE },
 397         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN),
 398           HID_BATTERY_QUIRK_IGNORE },
 399         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
 400           HID_BATTERY_QUIRK_IGNORE },
 401         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
 402           HID_BATTERY_QUIRK_IGNORE },
 403         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_13T_AW100),
 404           HID_BATTERY_QUIRK_IGNORE },
 405         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V1),
 406           HID_BATTERY_QUIRK_IGNORE },
 407         { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_HP_SPECTRE_X360_14T_EA100_V2),
 408           HID_BATTERY_QUIRK_IGNORE },
 409         {}
 410 };
 411
 412 static unsigned find_battery_quirk(struct hid_device *hdev)
 413 {
 414         unsigned quirks = 0;
 415         const struct hid_device_id *match;
 416
 417         match = hid_match_id(hdev, hid_battery_quirks);
 418         if (match != NULL)
 419                 quirks = match->driver_data;
 420
 421         return quirks;
 422 }
 423
 424 static int hidinput_scale_battery_capacity(struct hid_device *dev,
 425                                            int value)
 426 {
 427         if (dev->battery_min < dev->battery_max &&
 428             value >= dev->battery_min && value <= dev->battery_max)
 429                 value = ((value - dev->battery_min) * 100) /
 430                         (dev->battery_max - dev->battery_min);
 431
 432         return value;
 433 }
 434
 435 static int hidinput_query_battery_capacity(struct hid_device *dev)
 436 {
 437         u8 *buf;
 438         int ret;
 439
 440         buf = kmalloc(4, GFP_KERNEL);
 441         if (!buf)
 442                 return -ENOMEM;
 443
 444         ret = hid_hw_raw_request(dev, dev->battery_report_id, buf, 4,
 445                                  dev->battery_report_type, HID_REQ_GET_REPORT);
 446         if (ret < 2) {
 447                 kfree(buf);
 448                 return -ENODATA;
 449         }
 450
 451         ret = hidinput_scale_battery_capacity(dev, buf[1]);
 452         kfree(buf);
 453         return ret;
 454 }
 455
 456 static int hidinput_get_battery_property(struct power_supply *psy,
 457                                          enum power_supply_property prop,
 458                                          union power_supply_propval *val)
 459 {
 460         struct hid_device *dev = power_supply_get_drvdata(psy);
 461         int value;
 462         int ret = 0;
 463
 464         switch (prop) {
 465         case POWER_SUPPLY_PROP_PRESENT:
 466         case POWER_SUPPLY_PROP_ONLINE:
 467                 val->intval = 1;
 468                 break;
 469
 470         case POWER_SUPPLY_PROP_CAPACITY:
 471                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 472                     !dev->battery_avoid_query) {
 473                         value = hidinput_query_battery_capacity(dev);
 474                         if (value < 0)
 475                                 return value;
 476                 } else  {
 477                         value = dev->battery_capacity;
 478                 }
 479
 480                 val->intval = value;
 481                 break;
 482
 483         case POWER_SUPPLY_PROP_MODEL_NAME:
 484                 val->strval = dev->name;
 485                 break;
 486
 487         case POWER_SUPPLY_PROP_STATUS:
 488                 if (dev->battery_status != HID_BATTERY_REPORTED &&
 489                     !dev->battery_avoid_query) {
 490                         value = hidinput_query_battery_capacity(dev);
 491                         if (value < 0)
 492                                 return value;
 493
 494                         dev->battery_capacity = value;
 495                         dev->battery_status = HID_BATTERY_QUERIED;
 496                 }
 497
 498                 if (dev->battery_status == HID_BATTERY_UNKNOWN)
 499                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
 500                 else
 501                         val->intval = dev->battery_charge_status;
 502                 break;
 503
 504         case POWER_SUPPLY_PROP_SCOPE:
 505                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 506                 break;
 507
 508         default:
 509                 ret = -EINVAL;
 510                 break;
 511         }
 512
 513         return ret;
 514 }
 515
 516 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 517                                   struct hid_field *field, bool is_percentage)
 518 {
 519         struct power_supply_desc *psy_desc;
 520         struct power_supply_config psy_cfg = { .drv_data = dev, };
 521         unsigned quirks;
 522         s32 min, max;
 523         int error;
 524
 525         if (dev->battery)
 526                 return 0;       /* already initialized? */
 527
 528         quirks = find_battery_quirk(dev);
 529
 530         hid_dbg(dev, "device %x:%x:%x %d quirks %d\n",
 531                 dev->bus, dev->vendor, dev->product, dev->version, quirks);
 532
 533         if (quirks & HID_BATTERY_QUIRK_IGNORE)
 534                 return 0;
 535
 536         psy_desc = kzalloc(sizeof(*psy_desc), GFP_KERNEL);
 537         if (!psy_desc)
 538                 return -ENOMEM;
 539
 540         psy_desc->name = kasprintf(GFP_KERNEL, "hid-%s-battery",
 541                                    strlen(dev->uniq) ?
 542                                         dev->uniq : dev_name(&dev->dev));
 543         if (!psy_desc->name) {
 544                 error = -ENOMEM;
 545                 goto err_free_mem;
 546         }
 547
 548         psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
 549         psy_desc->properties = hidinput_battery_props;
 550         psy_desc->num_properties = ARRAY_SIZE(hidinput_battery_props);
 551         psy_desc->use_for_apm = 0;
 552         psy_desc->get_property = hidinput_get_battery_property;
 553
 554         min = field->logical_minimum;
 555         max = field->logical_maximum;
 556
 557         if (is_percentage || (quirks & HID_BATTERY_QUIRK_PERCENT)) {
 558                 min = 0;
 559                 max = 100;
 560         }
 561
 562         if (quirks & HID_BATTERY_QUIRK_FEATURE)
 563                 report_type = HID_FEATURE_REPORT;
 564
 565         dev->battery_min = min;
 566         dev->battery_max = max;
 567         dev->battery_report_type = report_type;
 568         dev->battery_report_id = field->report->id;
 569         dev->battery_charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
 570
 571         /*
 572          * Stylus is normally not connected to the device and thus we
 573          * can't query the device and get meaningful battery strength.
 574          * We have to wait for the device to report it on its own.
 575          */
 576         dev->battery_avoid_query = report_type == HID_INPUT_REPORT &&
 577                                    field->physical == HID_DG_STYLUS;
 578
 579         if (quirks & HID_BATTERY_QUIRK_AVOID_QUERY)
 580                 dev->battery_avoid_query = true;
 581
 582         dev->battery = power_supply_register(&dev->dev, psy_desc, &psy_cfg);
 583         if (IS_ERR(dev->battery)) {
 584                 error = PTR_ERR(dev->battery);
 585                 hid_warn(dev, "can't register power supply: %d\n", error);
 586                 goto err_free_name;
 587         }
 588
 589         power_supply_powers(dev->battery, &dev->dev);
 590         return 0;
 591
 592 err_free_name:
 593         kfree(psy_desc->name);
 594 err_free_mem:
 595         kfree(psy_desc);
 596         dev->battery = NULL;
 597         return error;
 598 }
 599
 600 static void hidinput_cleanup_battery(struct hid_device *dev)
 601 {
 602         const struct power_supply_desc *psy_desc;
 603
 604         if (!dev->battery)
 605                 return;
 606
 607         psy_desc = dev->battery->desc;
 608         power_supply_unregister(dev->battery);
 609         kfree(psy_desc->name);
 610         kfree(psy_desc);
 611         dev->battery = NULL;
 612 }
 613
 614 static void hidinput_update_battery(struct hid_device *dev, int value)
 615 {
 616         int capacity;
 617
 618         if (!dev->battery)
 619                 return;
 620
 621         if (value == 0 || value < dev->battery_min || value > dev->battery_max)
 622                 return;
 623
 624         capacity = hidinput_scale_battery_capacity(dev, value);
 625
 626         if (dev->battery_status != HID_BATTERY_REPORTED ||
 627             capacity != dev->battery_capacity ||
 628             ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) {
 629                 dev->battery_capacity = capacity;
 630                 dev->battery_status = HID_BATTERY_REPORTED;
 631                 dev->battery_ratelimit_time =
 632                         ktime_add_ms(ktime_get_coarse(), 30 * 1000);
 633                 power_supply_changed(dev->battery);
 634         }
 635 }
 636
 637 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 638                                                unsigned int usage, int value)
 639 {
 640         switch (usage) {
 641         case HID_BAT_CHARGING:
 642                 dev->battery_charge_status = value ?
 643                                              POWER_SUPPLY_STATUS_CHARGING :
 644                                              POWER_SUPPLY_STATUS_DISCHARGING;
 645                 return true;
 646         }
 647
 648         return false;
 649 }
 650 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
 651 static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
 652                                   struct hid_field *field, bool is_percentage)
 653 {
 654         return 0;
 655 }
 656
 657 static void hidinput_cleanup_battery(struct hid_device *dev)
 658 {
 659 }
 660
 661 static void hidinput_update_battery(struct hid_device *dev, int value)
 662 {
 663 }
 664
 665 static bool hidinput_set_battery_charge_status(struct hid_device *dev,
 666                                                unsigned int usage, int value)
 667 {
 668         return false;
 669 }
 670 #endif  /* CONFIG_HID_BATTERY_STRENGTH */
 671
 672 static bool hidinput_field_in_collection(struct hid_device *device, struct hid_field *field,
 673                                          unsigned int type, unsigned int usage)
 674 {
 675         struct hid_collection *collection;
 676
 677         collection = &device->collection[field->usage->collection_index];
 678
 679         return collection->type == type && collection->usage == usage;
 680 }
 681
 682 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 683                                      struct hid_usage *usage, unsigned int usage_index)
 684 {
 685         struct input_dev *input = hidinput->input;
 686         struct hid_device *device = input_get_drvdata(input);
 687         const struct usage_priority *usage_priority = NULL;
 688         int max = 0, code;
 689         unsigned int i = 0;
 690         unsigned long *bit = NULL;
 691
 692         field->hidinput = hidinput;
 693
 694         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 695                 goto ignore;
 696
 697         /* Ignore if report count is out of bounds. */
 698         if (field->report_count < 1)
 699                 goto ignore;
 700
 701         /* only LED usages are supported in output fields */
 702         if (field->report_type == HID_OUTPUT_REPORT &&
 703                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 704                 goto ignore;
 705         }
 706
 707         /* assign a priority based on the static list declared here */
 708         for (i = 0; i < ARRAY_SIZE(hidinput_usages_priorities); i++) {
 709                 if (usage->hid == hidinput_usages_priorities[i].usage) {
 710                         usage_priority = &hidinput_usages_priorities[i];
 711
 712                         field->usages_priorities[usage_index] =
 713                                 (ARRAY_SIZE(hidinput_usages_priorities) - i) << 8;
 714                         break;
 715                 }
 716         }
 717
 718         /*
 719          * For slotted devices, we need to also add the slot index
 720          * in the priority.
 721          */
 722         if (usage_priority && usage_priority->global)
 723                 field->usages_priorities[usage_index] |=
 724                         usage_priority->slot_overwrite;
 725         else
 726                 field->usages_priorities[usage_index] |=
 727                         (0xff - field->slot_idx) << 16;
 728
 729         if (device->driver->input_mapping) {
 730                 int ret = device->driver->input_mapping(device, hidinput, field,
 731                                 usage, &bit, &max);
 732                 if (ret > 0)
 733                         goto mapped;
 734                 if (ret < 0)
 735                         goto ignore;
 736         }
 737
 738         switch (usage->hid & HID_USAGE_PAGE) {
 739         case HID_UP_UNDEFINED:
 740                 goto ignore;
 741
 742         case HID_UP_KEYBOARD:
 743                 set_bit(EV_REP, input->evbit);
 744
 745                 if ((usage->hid & HID_USAGE) < 256) {
 746                         if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 747                         map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 748                 } else
 749                         map_key(KEY_UNKNOWN);
 750
 751                 break;
 752
 753         case HID_UP_BUTTON:
 754                 code = ((usage->hid - 1) & HID_USAGE);
 755
 756                 switch (field->application) {
 757                 case HID_GD_MOUSE:
 758                 case HID_GD_POINTER:  code += BTN_MOUSE; break;
 759                 case HID_GD_JOYSTICK:
 760                                 if (code <= 0xf)
 761                                         code += BTN_JOYSTICK;
 762                                 else
 763                                         code += BTN_TRIGGER_HAPPY - 0x10;
 764                                 break;
 765                 case HID_GD_GAMEPAD:
 766                                 if (code <= 0xf)
 767                                         code += BTN_GAMEPAD;
 768                                 else
 769                                         code += BTN_TRIGGER_HAPPY - 0x10;
 770                                 break;
 771                 case HID_CP_CONSUMER_CONTROL:
 772                                 if (hidinput_field_in_collection(device, field,
 773                                                                  HID_COLLECTION_NAMED_ARRAY,
 774                                                                  HID_CP_PROGRAMMABLEBUTTONS)) {
 775                                         if (code <= 0x1d)
 776                                                 code += KEY_MACRO1;
 777                                         else
 778                                                 code += BTN_TRIGGER_HAPPY - 0x1e;
 779                                         break;
 780                                 }
 781                                 fallthrough;
 782                 default:
 783                         switch (field->physical) {
 784                         case HID_GD_MOUSE:
 785                         case HID_GD_POINTER:  code += BTN_MOUSE; break;
 786                         case HID_GD_JOYSTICK: code += BTN_JOYSTICK; break;
 787                         case HID_GD_GAMEPAD:  code += BTN_GAMEPAD; break;
 788                         default:              code += BTN_MISC;
 789                         }
 790                 }
 791
 792                 map_key(code);
 793                 break;
 794
 795         case HID_UP_SIMULATION:
 796                 switch (usage->hid & 0xffff) {
 797                 case 0xba: map_abs(ABS_RUDDER);   break;
 798                 case 0xbb: map_abs(ABS_THROTTLE); break;
 799                 case 0xc4: map_abs(ABS_GAS);      break;
 800                 case 0xc5: map_abs(ABS_BRAKE);    break;
 801                 case 0xc8: map_abs(ABS_WHEEL);    break;
 802                 default:   goto ignore;
 803                 }
 804                 break;
 805
 806         case HID_UP_GENDESK:
 807                 if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 808                         switch (usage->hid & 0xf) {
 809                         case 0x1: map_key_clear(KEY_POWER);  break;
 810                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 811                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 812                         case 0x4: map_key_clear(KEY_CONTEXT_MENU); break;
 813                         case 0x5: map_key_clear(KEY_MENU); break;
 814                         case 0x6: map_key_clear(KEY_PROG1); break;
 815                         case 0x7: map_key_clear(KEY_HELP); break;
 816                         case 0x8: map_key_clear(KEY_EXIT); break;
 817                         case 0x9: map_key_clear(KEY_SELECT); break;
 818                         case 0xa: map_key_clear(KEY_RIGHT); break;
 819                         case 0xb: map_key_clear(KEY_LEFT); break;
 820                         case 0xc: map_key_clear(KEY_UP); break;
 821                         case 0xd: map_key_clear(KEY_DOWN); break;
 822                         case 0xe: map_key_clear(KEY_POWER2); break;
 823                         case 0xf: map_key_clear(KEY_RESTART); break;
 824                         default: goto unknown;
 825                         }
 826                         break;
 827                 }
 828
 829                 if ((usage->hid & 0xf0) == 0xa0) {      /* SystemControl */
 830                         switch (usage->hid & 0xf) {
 831                         case 0x9: map_key_clear(KEY_MICMUTE); break;
 832                         default: goto ignore;
 833                         }
 834                         break;
 835                 }
 836
 837                 if ((usage->hid & 0xf0) == 0xb0) {      /* SC - Display */
 838                         switch (usage->hid & 0xf) {
 839                         case 0x05: map_key_clear(KEY_SWITCHVIDEOMODE); break;
 840                         default: goto ignore;
 841                         }
 842                         break;
 843                 }
 844
 845                 /*
 846                  * Some lazy vendors declare 255 usages for System Control,
 847                  * leading to the creation of ABS_X|Y axis and too many others.
 848                  * It wouldn't be a problem if joydev doesn't consider the
 849                  * device as a joystick then.
 850                  */
 851                 if (field->application == HID_GD_SYSTEM_CONTROL)
 852                         goto ignore;
 853
 854                 if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 855                         switch (usage->hid) {
 856                         case HID_GD_UP:    usage->hat_dir = 1; break;
 857                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 858                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 859                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 860                         default: goto unknown;
 861                         }
 862                         if (field->dpad) {
 863                                 map_abs(field->dpad);
 864                                 goto ignore;
 865                         }
 866                         map_abs(ABS_HAT0X);
 867                         break;
 868                 }
 869
 870                 switch (usage->hid) {
 871                 /* These usage IDs map directly to the usage codes. */
 872                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 873                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 874                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 875                                 map_rel(usage->hid & 0xf);
 876                         else
 877                                 map_abs_clear(usage->hid & 0xf);
 878                         break;
 879
 880                 case HID_GD_WHEEL:
 881                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 882                                 set_bit(REL_WHEEL, input->relbit);
 883                                 map_rel(REL_WHEEL_HI_RES);
 884                         } else {
 885                                 map_abs(usage->hid & 0xf);
 886                         }
 887                         break;
 888                 case HID_GD_SLIDER: case HID_GD_DIAL:
 889                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 890                                 map_rel(usage->hid & 0xf);
 891                         else
 892                                 map_abs(usage->hid & 0xf);
 893                         break;
 894
 895                 case HID_GD_HATSWITCH:
 896                         usage->hat_min = field->logical_minimum;
 897                         usage->hat_max = field->logical_maximum;
 898                         map_abs(ABS_HAT0X);
 899                         break;
 900
 901                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 902                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 903
 904                 case HID_GD_RFKILL_BTN:
 905                         /* MS wireless radio ctl extension, also check CA */
 906                         if (field->application == HID_GD_WIRELESS_RADIO_CTLS) {
 907                                 map_key_clear(KEY_RFKILL);
 908                                 /* We need to simulate the btn release */
 909                                 field->flags |= HID_MAIN_ITEM_RELATIVE;
 910                                 break;
 911                         }
 912                         goto unknown;
 913
 914                 default: goto unknown;
 915                 }
 916
 917                 break;
 918
 919         case HID_UP_LED:
 920                 switch (usage->hid & 0xffff) {                /* HID-Value:                   */
 921                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 922                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 923                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 924                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 925                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 926                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 927                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 928                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 929                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 930                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 931                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 932
 933                 default: goto ignore;
 934                 }
 935                 break;
 936
 937         case HID_UP_DIGITIZER:
 938                 if ((field->application & 0xff) == 0x01) /* Digitizer */
 939                         __set_bit(INPUT_PROP_POINTER, input->propbit);
 940                 else if ((field->application & 0xff) == 0x02) /* Pen */
 941                         __set_bit(INPUT_PROP_DIRECT, input->propbit);
 942
 943                 switch (usage->hid & 0xff) {
 944                 case 0x00: /* Undefined */
 945                         goto ignore;
 946
 947                 case 0x30: /* TipPressure */
 948                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 949                                 device->quirks |= HID_QUIRK_NOTOUCH;
 950                                 set_bit(EV_KEY, input->evbit);
 951                                 set_bit(BTN_TOUCH, input->keybit);
 952                         }
 953                         map_abs_clear(ABS_PRESSURE);
 954                         break;
 955
 956                 case 0x32: /* InRange */
 957                         switch (field->physical) {
 958                         case HID_DG_PUCK:
 959                                 map_key(BTN_TOOL_MOUSE);
 960                                 break;
 961                         case HID_DG_FINGER:
 962                                 map_key(BTN_TOOL_FINGER);
 963                                 break;
 964                         default:
 965                                 /*
 966                                  * If the physical is not given,
 967                                  * rely on the application.
 968                                  */
 969                                 if (!field->physical) {
 970                                         switch (field->application) {
 971                                         case HID_DG_TOUCHSCREEN:
 972                                         case HID_DG_TOUCHPAD:
 973                                                 map_key_clear(BTN_TOOL_FINGER);
 974                                                 break;
 975                                         default:
 976                                                 map_key_clear(BTN_TOOL_PEN);
 977                                         }
 978                                 } else {
 979                                         map_key(BTN_TOOL_PEN);
 980                                 }
 981                                 break;
 982                         }
 983                         break;
 984
 985                 case 0x3b: /* Battery Strength */
 986                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
 987                         usage->type = EV_PWR;
 988                         return;
 989
 990                 case 0x3c: /* Invert */
 991                         map_key_clear(BTN_TOOL_RUBBER);
 992                         break;
 993
 994                 case 0x3d: /* X Tilt */
 995                         map_abs_clear(ABS_TILT_X);
 996                         break;
 997
 998                 case 0x3e: /* Y Tilt */
 999                         map_abs_clear(ABS_TILT_Y);
1000                         break;
1001
1002                 case 0x33: /* Touch */
1003                 case 0x42: /* TipSwitch */
1004                 case 0x43: /* TipSwitch2 */
1005                         device->quirks &= ~HID_QUIRK_NOTOUCH;
1006                         map_key_clear(BTN_TOUCH);
1007                         break;
1008
1009                 case 0x44: /* BarrelSwitch */
1010                         map_key_clear(BTN_STYLUS);
1011                         break;
1012
1013                 case 0x45: /* ERASER */
1014                         /*
1015                          * This event is reported when eraser tip touches the surface.
1016                          * Actual eraser (BTN_TOOL_RUBBER) is set by Invert usage when
1017                          * tool gets in proximity.
1018                          */
1019                         map_key_clear(BTN_TOUCH);
1020                         break;
1021
1022                 case 0x46: /* TabletPick */
1023                 case 0x5a: /* SecondaryBarrelSwitch */
1024                         map_key_clear(BTN_STYLUS2);
1025                         break;
1026
1027                 case 0x5b: /* TransducerSerialNumber */
1028                 case 0x6e: /* TransducerSerialNumber2 */
1029                         map_msc(MSC_SERIAL);
1030                         break;
1031
1032                 default:  goto unknown;
1033                 }
1034                 break;
1035
1036         case HID_UP_TELEPHONY:
1037                 switch (usage->hid & HID_USAGE) {
1038                 case 0x2f: map_key_clear(KEY_MICMUTE);          break;
1039                 case 0xb0: map_key_clear(KEY_NUMERIC_0);        break;
1040                 case 0xb1: map_key_clear(KEY_NUMERIC_1);        break;
1041                 case 0xb2: map_key_clear(KEY_NUMERIC_2);        break;
1042                 case 0xb3: map_key_clear(KEY_NUMERIC_3);        break;
1043                 case 0xb4: map_key_clear(KEY_NUMERIC_4);        break;
1044                 case 0xb5: map_key_clear(KEY_NUMERIC_5);        break;
1045                 case 0xb6: map_key_clear(KEY_NUMERIC_6);        break;
1046                 case 0xb7: map_key_clear(KEY_NUMERIC_7);        break;
1047                 case 0xb8: map_key_clear(KEY_NUMERIC_8);        break;
1048                 case 0xb9: map_key_clear(KEY_NUMERIC_9);        break;
1049                 case 0xba: map_key_clear(KEY_NUMERIC_STAR);     break;
1050                 case 0xbb: map_key_clear(KEY_NUMERIC_POUND);    break;
1051                 case 0xbc: map_key_clear(KEY_NUMERIC_A);        break;
1052                 case 0xbd: map_key_clear(KEY_NUMERIC_B);        break;
1053                 case 0xbe: map_key_clear(KEY_NUMERIC_C);        break;
1054                 case 0xbf: map_key_clear(KEY_NUMERIC_D);        break;
1055                 default: goto ignore;
1056                 }
1057                 break;
1058
1059         case HID_UP_CONSUMER:   /* USB HUT v1.12, pages 75-84 */
1060                 switch (usage->hid & HID_USAGE) {
1061                 case 0x000: goto ignore;
1062                 case 0x030: map_key_clear(KEY_POWER);           break;
1063                 case 0x031: map_key_clear(KEY_RESTART);         break;
1064                 case 0x032: map_key_clear(KEY_SLEEP);           break;
1065                 case 0x034: map_key_clear(KEY_SLEEP);           break;
1066                 case 0x035: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1067                 case 0x036: map_key_clear(BTN_MISC);            break;
1068
1069                 case 0x040: map_key_clear(KEY_MENU);            break; /* Menu */
1070                 case 0x041: map_key_clear(KEY_SELECT);          break; /* Menu Pick */
1071                 case 0x042: map_key_clear(KEY_UP);              break; /* Menu Up */
1072                 case 0x043: map_key_clear(KEY_DOWN);            break; /* Menu Down */
1073                 case 0x044: map_key_clear(KEY_LEFT);            break; /* Menu Left */
1074                 case 0x045: map_key_clear(KEY_RIGHT);           break; /* Menu Right */
1075                 case 0x046: map_key_clear(KEY_ESC);             break; /* Menu Escape */
1076                 case 0x047: map_key_clear(KEY_KPPLUS);          break; /* Menu Value Increase */
1077                 case 0x048: map_key_clear(KEY_KPMINUS);         break; /* Menu Value Decrease */
1078
1079                 case 0x060: map_key_clear(KEY_INFO);            break; /* Data On Screen */
1080                 case 0x061: map_key_clear(KEY_SUBTITLE);        break; /* Closed Caption */
1081                 case 0x063: map_key_clear(KEY_VCR);             break; /* VCR/TV */
1082                 case 0x065: map_key_clear(KEY_CAMERA);          break; /* Snapshot */
1083                 case 0x069: map_key_clear(KEY_RED);             break;
1084                 case 0x06a: map_key_clear(KEY_GREEN);           break;
1085                 case 0x06b: map_key_clear(KEY_BLUE);            break;
1086                 case 0x06c: map_key_clear(KEY_YELLOW);          break;
1087                 case 0x06d: map_key_clear(KEY_ASPECT_RATIO);    break;
1088
1089                 case 0x06f: map_key_clear(KEY_BRIGHTNESSUP);            break;
1090                 case 0x070: map_key_clear(KEY_BRIGHTNESSDOWN);          break;
1091                 case 0x072: map_key_clear(KEY_BRIGHTNESS_TOGGLE);       break;
1092                 case 0x073: map_key_clear(KEY_BRIGHTNESS_MIN);          break;
1093                 case 0x074: map_key_clear(KEY_BRIGHTNESS_MAX);          break;
1094                 case 0x075: map_key_clear(KEY_BRIGHTNESS_AUTO);         break;
1095
1096                 case 0x076: map_key_clear(KEY_CAMERA_ACCESS_ENABLE);    break;
1097                 case 0x077: map_key_clear(KEY_CAMERA_ACCESS_DISABLE);   break;
1098                 case 0x078: map_key_clear(KEY_CAMERA_ACCESS_TOGGLE);    break;
1099
1100                 case 0x079: map_key_clear(KEY_KBDILLUMUP);      break;
1101                 case 0x07a: map_key_clear(KEY_KBDILLUMDOWN);    break;
1102                 case 0x07c: map_key_clear(KEY_KBDILLUMTOGGLE);  break;
1103
1104                 case 0x082: map_key_clear(KEY_VIDEO_NEXT);      break;
1105                 case 0x083: map_key_clear(KEY_LAST);            break;
1106                 case 0x084: map_key_clear(KEY_ENTER);           break;
1107                 case 0x088: map_key_clear(KEY_PC);              break;
1108                 case 0x089: map_key_clear(KEY_TV);              break;
1109                 case 0x08a: map_key_clear(KEY_WWW);             break;
1110                 case 0x08b: map_key_clear(KEY_DVD);             break;
1111                 case 0x08c: map_key_clear(KEY_PHONE);           break;
1112                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
1113                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
1114                 case 0x08f: map_key_clear(KEY_GAMES);           break;
1115                 case 0x090: map_key_clear(KEY_MEMO);            break;
1116                 case 0x091: map_key_clear(KEY_CD);              break;
1117                 case 0x092: map_key_clear(KEY_VCR);             break;
1118                 case 0x093: map_key_clear(KEY_TUNER);           break;
1119                 case 0x094: map_key_clear(KEY_EXIT);            break;
1120                 case 0x095: map_key_clear(KEY_HELP);            break;
1121                 case 0x096: map_key_clear(KEY_TAPE);            break;
1122                 case 0x097: map_key_clear(KEY_TV2);             break;
1123                 case 0x098: map_key_clear(KEY_SAT);             break;
1124                 case 0x09a: map_key_clear(KEY_PVR);             break;
1125
1126                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
1127                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
1128                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
1129
1130                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
1131                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
1132                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
1133                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
1134                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
1135                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
1136                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
1137                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
1138                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
1139                 case 0x0bc: map_key_clear(KEY_MEDIA_REPEAT);    break;
1140                 case 0x0b9: map_key_clear(KEY_SHUFFLE);         break;
1141                 case 0x0bf: map_key_clear(KEY_SLOW);            break;
1142
1143                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
1144                 case 0x0cf: map_key_clear(KEY_VOICECOMMAND);    break;
1145
1146                 case 0x0d8: map_key_clear(KEY_DICTATE);         break;
1147                 case 0x0d9: map_key_clear(KEY_EMOJI_PICKER);    break;
1148
1149                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
1150                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
1151                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
1152                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
1153                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
1154                 case 0x0f5: map_key_clear(KEY_SLOW);            break;
1155
1156                 case 0x181: map_key_clear(KEY_BUTTONCONFIG);    break;
1157                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
1158                 case 0x183: map_key_clear(KEY_CONFIG);          break;
1159                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
1160                 case 0x185: map_key_clear(KEY_EDITOR);          break;
1161                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
1162                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
1163                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
1164                 case 0x189: map_key_clear(KEY_DATABASE);        break;
1165                 case 0x18a: map_key_clear(KEY_MAIL);            break;
1166                 case 0x18b: map_key_clear(KEY_NEWS);            break;
1167                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
1168                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
1169                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
1170                 case 0x18f: map_key_clear(KEY_TASKMANAGER);     break;
1171                 case 0x190: map_key_clear(KEY_JOURNAL);         break;
1172                 case 0x191: map_key_clear(KEY_FINANCE);         break;
1173                 case 0x192: map_key_clear(KEY_CALC);            break;
1174                 case 0x193: map_key_clear(KEY_PLAYER);          break;
1175                 case 0x194: map_key_clear(KEY_FILE);            break;
1176                 case 0x196: map_key_clear(KEY_WWW);             break;
1177                 case 0x199: map_key_clear(KEY_CHAT);            break;
1178                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
1179                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
1180                 case 0x19f: map_key_clear(KEY_CONTROLPANEL);            break;
1181                 case 0x1a2: map_key_clear(KEY_APPSELECT);               break;
1182                 case 0x1a3: map_key_clear(KEY_NEXT);            break;
1183                 case 0x1a4: map_key_clear(KEY_PREVIOUS);        break;
1184                 case 0x1a6: map_key_clear(KEY_HELP);            break;
1185                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
1186                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
1187                 case 0x1ae: map_key_clear(KEY_KEYBOARD);        break;
1188                 case 0x1b1: map_key_clear(KEY_SCREENSAVER);             break;
1189                 case 0x1b4: map_key_clear(KEY_FILE);            break;
1190                 case 0x1b6: map_key_clear(KEY_IMAGES);          break;
1191                 case 0x1b7: map_key_clear(KEY_AUDIO);           break;
1192                 case 0x1b8: map_key_clear(KEY_VIDEO);           break;
1193                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
1194                 case 0x1bd: map_key_clear(KEY_INFO);            break;
1195                 case 0x1cb: map_key_clear(KEY_ASSISTANT);       break;
1196                 case 0x201: map_key_clear(KEY_NEW);             break;
1197                 case 0x202: map_key_clear(KEY_OPEN);            break;
1198                 case 0x203: map_key_clear(KEY_CLOSE);           break;
1199                 case 0x204: map_key_clear(KEY_EXIT);            break;
1200                 case 0x207: map_key_clear(KEY_SAVE);            break;
1201                 case 0x208: map_key_clear(KEY_PRINT);           break;
1202                 case 0x209: map_key_clear(KEY_PROPS);           break;
1203                 case 0x21a: map_key_clear(KEY_UNDO);            break;
1204                 case 0x21b: map_key_clear(KEY_COPY);            break;
1205                 case 0x21c: map_key_clear(KEY_CUT);             break;
1206                 case 0x21d: map_key_clear(KEY_PASTE);           break;
1207                 case 0x21f: map_key_clear(KEY_FIND);            break;
1208                 case 0x221: map_key_clear(KEY_SEARCH);          break;
1209                 case 0x222: map_key_clear(KEY_GOTO);            break;
1210                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
1211                 case 0x224: map_key_clear(KEY_BACK);            break;
1212                 case 0x225: map_key_clear(KEY_FORWARD);         break;
1213                 case 0x226: map_key_clear(KEY_STOP);            break;
1214                 case 0x227: map_key_clear(KEY_REFRESH);         break;
1215                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
1216                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
1217                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
1218                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
1219                 case 0x232: map_key_clear(KEY_FULL_SCREEN);     break;
1220                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
1221                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
1222                 case 0x238: /* AC Pan */
1223                         set_bit(REL_HWHEEL, input->relbit);
1224                         map_rel(REL_HWHEEL_HI_RES);
1225                         break;
1226                 case 0x23d: map_key_clear(KEY_EDIT);            break;
1227                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
1228                 case 0x269: map_key_clear(KEY_INSERT);          break;
1229                 case 0x26a: map_key_clear(KEY_DELETE);          break;
1230                 case 0x279: map_key_clear(KEY_REDO);            break;
1231
1232                 case 0x289: map_key_clear(KEY_REPLY);           break;
1233                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
1234                 case 0x28c: map_key_clear(KEY_SEND);            break;
1235
1236                 case 0x29d: map_key_clear(KEY_KBD_LAYOUT_NEXT); break;
1237
1238                 case 0x2a2: map_key_clear(KEY_ALL_APPLICATIONS);        break;
1239
1240                 case 0x2c7: map_key_clear(KEY_KBDINPUTASSIST_PREV);             break;
1241                 case 0x2c8: map_key_clear(KEY_KBDINPUTASSIST_NEXT);             break;
1242                 case 0x2c9: map_key_clear(KEY_KBDINPUTASSIST_PREVGROUP);                break;
1243                 case 0x2ca: map_key_clear(KEY_KBDINPUTASSIST_NEXTGROUP);                break;
1244                 case 0x2cb: map_key_clear(KEY_KBDINPUTASSIST_ACCEPT);   break;
1245                 case 0x2cc: map_key_clear(KEY_KBDINPUTASSIST_CANCEL);   break;
1246
1247                 case 0x29f: map_key_clear(KEY_SCALE);           break;
1248
1249                 default: map_key_clear(KEY_UNKNOWN);
1250                 }
1251                 break;
1252
1253         case HID_UP_GENDEVCTRLS:
1254                 switch (usage->hid) {
1255                 case HID_DC_BATTERYSTRENGTH:
1256                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, false);
1257                         usage->type = EV_PWR;
1258                         return;
1259                 }
1260                 goto unknown;
1261
1262         case HID_UP_BATTERY:
1263                 switch (usage->hid) {
1264                 case HID_BAT_ABSOLUTESTATEOFCHARGE:
1265                         hidinput_setup_battery(device, HID_INPUT_REPORT, field, true);
1266                         usage->type = EV_PWR;
1267                         return;
1268                 case HID_BAT_CHARGING:
1269                         usage->type = EV_PWR;
1270                         return;
1271                 }
1272                 goto unknown;
1273         case HID_UP_CAMERA:
1274                 switch (usage->hid & HID_USAGE) {
1275                 case 0x020:
1276                         map_key_clear(KEY_CAMERA_FOCUS);        break;
1277                 case 0x021:
1278                         map_key_clear(KEY_CAMERA);              break;
1279                 default:
1280                         goto ignore;
1281                 }
1282                 break;
1283
1284         case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
1285                 set_bit(EV_REP, input->evbit);
1286                 switch (usage->hid & HID_USAGE) {
1287                 case 0x021: map_key_clear(KEY_PRINT);           break;
1288                 case 0x070: map_key_clear(KEY_HP);              break;
1289                 case 0x071: map_key_clear(KEY_CAMERA);          break;
1290                 case 0x072: map_key_clear(KEY_SOUND);           break;
1291                 case 0x073: map_key_clear(KEY_QUESTION);        break;
1292                 case 0x080: map_key_clear(KEY_EMAIL);           break;
1293                 case 0x081: map_key_clear(KEY_CHAT);            break;
1294                 case 0x082: map_key_clear(KEY_SEARCH);          break;
1295                 case 0x083: map_key_clear(KEY_CONNECT);         break;
1296                 case 0x084: map_key_clear(KEY_FINANCE);         break;
1297                 case 0x085: map_key_clear(KEY_SPORT);           break;
1298                 case 0x086: map_key_clear(KEY_SHOP);            break;
1299                 default:    goto ignore;
1300                 }
1301                 break;
1302
1303         case HID_UP_HPVENDOR2:
1304                 set_bit(EV_REP, input->evbit);
1305                 switch (usage->hid & HID_USAGE) {
1306                 case 0x001: map_key_clear(KEY_MICMUTE);         break;
1307                 case 0x003: map_key_clear(KEY_BRIGHTNESSDOWN);  break;
1308                 case 0x004: map_key_clear(KEY_BRIGHTNESSUP);    break;
1309                 default:    goto ignore;
1310                 }
1311                 break;
1312
1313         case HID_UP_MSVENDOR:
1314                 goto ignore;
1315
1316         case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
1317                 set_bit(EV_REP, input->evbit);
1318                 goto ignore;
1319
1320         case HID_UP_LOGIVENDOR:
1321                 /* intentional fallback */
1322         case HID_UP_LOGIVENDOR2:
1323                 /* intentional fallback */
1324         case HID_UP_LOGIVENDOR3:
1325                 goto ignore;
1326
1327         case HID_UP_PID:
1328                 switch (usage->hid & HID_USAGE) {
1329                 case 0xa4: map_key_clear(BTN_DEAD);     break;
1330                 default: goto ignore;
1331                 }
1332                 break;
1333
1334         default:
1335         unknown:
1336                 if (field->report_size == 1) {
1337                         if (field->report->type == HID_OUTPUT_REPORT) {
1338                                 map_led(LED_MISC);
1339                                 break;
1340                         }
1341                         map_key(BTN_MISC);
1342                         break;
1343                 }
1344                 if (field->flags & HID_MAIN_ITEM_RELATIVE) {
1345                         map_rel(REL_MISC);
1346                         break;
1347                 }
1348                 map_abs(ABS_MISC);
1349                 break;
1350         }
1351
1352 mapped:
1353         /* Mapping failed, bail out */
1354         if (!bit)
1355                 return;
1356
1357         if (device->driver->input_mapped &&
1358             device->driver->input_mapped(device, hidinput, field, usage,
1359                                          &bit, &max) < 0) {
1360                 /*
1361                  * The driver indicated that no further generic handling
1362                  * of the usage is desired.
1363                  */
1364                 return;
1365         }
1366
1367         set_bit(usage->type, input->evbit);
1368
1369         /*
1370          * This part is *really* controversial:
1371          * - HID aims at being generic so we should do our best to export
1372          *   all incoming events
1373          * - HID describes what events are, so there is no reason for ABS_X
1374          *   to be mapped to ABS_Y
1375          * - HID is using *_MISC+N as a default value, but nothing prevents
1376          *   *_MISC+N to overwrite a legitimate even, which confuses userspace
1377          *   (for instance ABS_MISC + 7 is ABS_MT_SLOT, which has a different
1378          *   processing)
1379          *
1380          * If devices still want to use this (at their own risk), they will
1381          * have to use the quirk HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE, but
1382          * the default should be a reliable mapping.
1383          */
1384         while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
1385                 if (device->quirks & HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE) {
1386                         usage->code = find_next_zero_bit(bit,
1387                                                          max + 1,
1388                                                          usage->code);
1389                 } else {
1390                         device->status |= HID_STAT_DUP_DETECTED;
1391                         goto ignore;
1392                 }
1393         }
1394
1395         if (usage->code > max)
1396                 goto ignore;
1397
1398         if (usage->type == EV_ABS) {
1399
1400                 int a = field->logical_minimum;
1401                 int b = field->logical_maximum;
1402
1403                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
1404                         a = field->logical_minimum = 0;
1405                         b = field->logical_maximum = 255;
1406                 }
1407
1408                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
1409                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
1410                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
1411
1412                 input_abs_set_res(input, usage->code,
1413                                   hidinput_calc_abs_res(field, usage->code));
1414
1415                 /* use a larger default input buffer for MT devices */
1416                 if (usage->code == ABS_MT_POSITION_X && input->hint_events_per_packet == 0)
1417                         input_set_events_per_packet(input, 60);
1418         }
1419
1420         if (usage->type == EV_ABS &&
1421             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
1422                 int i;
1423                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
1424                         input_set_abs_params(input, i, -1, 1, 0, 0);
1425                         set_bit(i, input->absbit);
1426                 }
1427                 if (usage->hat_dir && !field->dpad)
1428                         field->dpad = usage->code;
1429         }
1430
1431         /* for those devices which produce Consumer volume usage as relative,
1432          * we emulate pressing volumeup/volumedown appropriate number of times
1433          * in hidinput_hid_event()
1434          */
1435         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
1436                         (usage->code == ABS_VOLUME)) {
1437                 set_bit(KEY_VOLUMEUP, input->keybit);
1438                 set_bit(KEY_VOLUMEDOWN, input->keybit);
1439         }
1440
1441         if (usage->type == EV_KEY) {
1442                 set_bit(EV_MSC, input->evbit);
1443                 set_bit(MSC_SCAN, input->mscbit);
1444         }
1445
1446         return;
1447
1448 ignore:
1449         usage->type = 0;
1450         usage->code = 0;
1451 }
1452
1453 static void hidinput_handle_scroll(struct hid_usage *usage,
1454                                    struct input_dev *input,
1455                                    __s32 value)
1456 {
1457         int code;
1458         int hi_res, lo_res;
1459
1460         if (value == 0)
1461                 return;
1462
1463         if (usage->code == REL_WHEEL_HI_RES)
1464                 code = REL_WHEEL;
1465         else
1466                 code = REL_HWHEEL;
1467
1468         /*
1469          * Windows reports one wheel click as value 120. Where a high-res
1470          * scroll wheel is present, a fraction of 120 is reported instead.
1471          * Our REL_WHEEL_HI_RES axis does the same because all HW must
1472          * adhere to the 120 expectation.
1473          */
1474         hi_res = value * 120/usage->resolution_multiplier;
1475
1476         usage->wheel_accumulated += hi_res;
1477         lo_res = usage->wheel_accumulated/120;
1478         if (lo_res)
1479                 usage->wheel_accumulated -= lo_res * 120;
1480
1481         input_event(input, EV_REL, code, lo_res);
1482         input_event(input, EV_REL, usage->code, hi_res);
1483 }
1484
1485 static void hid_report_release_tool(struct hid_report *report, struct input_dev *input,
1486                                     unsigned int tool)
1487 {
1488         /* if the given tool is not currently reported, ignore */
1489         if (!test_bit(tool, input->key))
1490                 return;
1491
1492         /*
1493          * if the given tool was previously set, release it,
1494          * release any TOUCH and send an EV_SYN
1495          */
1496         input_event(input, EV_KEY, BTN_TOUCH, 0);
1497         input_event(input, EV_KEY, tool, 0);
1498         input_event(input, EV_SYN, SYN_REPORT, 0);
1499
1500         report->tool = 0;
1501 }
1502
1503 static void hid_report_set_tool(struct hid_report *report, struct input_dev *input,
1504                                 unsigned int new_tool)
1505 {
1506         if (report->tool != new_tool)
1507                 hid_report_release_tool(report, input, report->tool);
1508
1509         input_event(input, EV_KEY, new_tool, 1);
1510         report->tool = new_tool;
1511 }
1512
1513 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
1514 {
1515         struct input_dev *input;
1516         struct hid_report *report = field->report;
1517         unsigned *quirks = &hid->quirks;
1518
1519         if (!usage->type)
1520                 return;
1521
1522         if (usage->type == EV_PWR) {
1523                 bool handled = hidinput_set_battery_charge_status(hid, usage->hid, value);
1524
1525                 if (!handled)
1526                         hidinput_update_battery(hid, value);
1527
1528                 return;
1529         }
1530
1531         if (!field->hidinput)
1532                 return;
1533
1534         input = field->hidinput->input;
1535
1536         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
1537                 int hat_dir = usage->hat_dir;
1538                 if (!hat_dir)
1539                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
1540                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
1541                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
1542                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
1543                 return;
1544         }
1545
1546         /*
1547          * Ignore out-of-range values as per HID specification,
1548          * section 5.10 and 6.2.25, when NULL state bit is present.
1549          * When it's not, clamp the value to match Microsoft's input
1550          * driver as mentioned in "Required HID usages for digitizers":
1551          * https://msdn.microsoft.com/en-us/library/windows/hardware/dn672278(v=vs.85).asp
1552          *
1553          * The logical_minimum < logical_maximum check is done so that we
1554          * don't unintentionally discard values sent by devices which
1555          * don't specify logical min and max.
1556          */
1557         if ((field->flags & HID_MAIN_ITEM_VARIABLE) &&
1558             field->logical_minimum < field->logical_maximum) {
1559                 if (field->flags & HID_MAIN_ITEM_NULL_STATE &&
1560                     (value < field->logical_minimum ||
1561                      value > field->logical_maximum)) {
1562                         dbg_hid("Ignoring out-of-range value %x\n", value);
1563                         return;
1564                 }
1565                 value = clamp(value,
1566                               field->logical_minimum,
1567                               field->logical_maximum);
1568         }
1569
1570         switch (usage->hid) {
1571         case HID_DG_ERASER:
1572                 report->tool_active |= !!value;
1573
1574                 /*
1575                  * if eraser is set, we must enforce BTN_TOOL_RUBBER
1576                  * to accommodate for devices not following the spec.
1577                  */
1578                 if (value)
1579                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1580                 else if (report->tool != BTN_TOOL_RUBBER)
1581                         /* value is off, tool is not rubber, ignore */
1582                         return;
1583
1584                 /* let hid-input set BTN_TOUCH */
1585                 break;
1586
1587         case HID_DG_INVERT:
1588                 report->tool_active |= !!value;
1589
1590                 /*
1591                  * If invert is set, we store BTN_TOOL_RUBBER.
1592                  */
1593                 if (value)
1594                         hid_report_set_tool(report, input, BTN_TOOL_RUBBER);
1595                 else if (!report->tool_active)
1596                         /* tool_active not set means Invert and Eraser are not set */
1597                         hid_report_release_tool(report, input, BTN_TOOL_RUBBER);
1598
1599                 /* no further processing */
1600                 return;
1601
1602         case HID_DG_INRANGE:
1603                 report->tool_active |= !!value;
1604
1605                 if (report->tool_active) {
1606                         /*
1607                          * if tool is not set but is marked as active,
1608                          * assume ours
1609                          */
1610                         if (!report->tool)
1611                                 report->tool = usage->code;
1612
1613                         /* drivers may have changed the value behind our back, resend it */
1614                         hid_report_set_tool(report, input, report->tool);
1615                 } else {
1616                         hid_report_release_tool(report, input, usage->code);
1617                 }
1618
1619                 /* reset tool_active for the next event */
1620                 report->tool_active = false;
1621
1622                 /* no further processing */
1623                 return;
1624
1625         case HID_DG_TIPSWITCH:
1626                 report->tool_active |= !!value;
1627
1628                 /* if tool is set to RUBBER we should ignore the current value */
1629                 if (report->tool == BTN_TOOL_RUBBER)
1630                         return;
1631
1632                 break;
1633
1634         case HID_DG_TIPPRESSURE:
1635                 if (*quirks & HID_QUIRK_NOTOUCH) {
1636                         int a = field->logical_minimum;
1637                         int b = field->logical_maximum;
1638
1639                         if (value > a + ((b - a) >> 3)) {
1640                                 input_event(input, EV_KEY, BTN_TOUCH, 1);
1641                                 report->tool_active = true;
1642                         }
1643                 }
1644                 break;
1645
1646         case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
1647                 dbg_hid("Maximum Effects - %d\n",value);
1648                 return;
1649
1650         case HID_UP_PID | 0x7fUL:
1651                 dbg_hid("PID Pool Report\n");
1652                 return;
1653         }
1654
1655         switch (usage->type) {
1656         case EV_KEY:
1657                 if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
1658                         return;
1659                 break;
1660
1661         case EV_REL:
1662                 if (usage->code == REL_WHEEL_HI_RES ||
1663                     usage->code == REL_HWHEEL_HI_RES) {
1664                         hidinput_handle_scroll(usage, input, value);
1665                         return;
1666                 }
1667                 break;
1668
1669         case EV_ABS:
1670                 if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1671                     usage->code == ABS_VOLUME) {
1672                         int count = abs(value);
1673                         int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
1674                         int i;
1675
1676                         for (i = 0; i < count; i++) {
1677                                 input_event(input, EV_KEY, direction, 1);
1678                                 input_sync(input);
1679                                 input_event(input, EV_KEY, direction, 0);
1680                                 input_sync(input);
1681                         }
1682                         return;
1683
1684                 } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
1685                            ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
1686                         value = field->logical_maximum - value;
1687                 break;
1688         }
1689
1690         /*
1691          * Ignore reports for absolute data if the data didn't change. This is
1692          * not only an optimization but also fixes 'dead' key reports. Some
1693          * RollOver implementations for localized keys (like BACKSLASH/PIPE; HID
1694          * 0x31 and 0x32) report multiple keys, even though a localized keyboard
1695          * can only have one of them physically available. The 'dead' keys
1696          * report constant 0. As all map to the same keycode, they'd confuse
1697          * the input layer. If we filter the 'dead' keys on the HID level, we
1698          * skip the keycode translation and only forward real events.
1699          */
1700         if (!(field->flags & (HID_MAIN_ITEM_RELATIVE |
1701                               HID_MAIN_ITEM_BUFFERED_BYTE)) &&
1702                               (field->flags & HID_MAIN_ITEM_VARIABLE) &&
1703             usage->usage_index < field->maxusage &&
1704             value == field->value[usage->usage_index])
1705                 return;
1706
1707         /* report the usage code as scancode if the key status has changed */
1708         if (usage->type == EV_KEY &&
1709             (!test_bit(usage->code, input->key)) == value)
1710                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
1711
1712         input_event(input, usage->type, usage->code, value);
1713
1714         if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
1715             usage->type == EV_KEY && value) {
1716                 input_sync(input);
1717                 input_event(input, usage->type, usage->code, 0);
1718         }
1719 }
1720
1721 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
1722 {
1723         struct hid_input *hidinput;
1724
1725         if (hid->quirks & HID_QUIRK_NO_INPUT_SYNC)
1726                 return;
1727
1728         list_for_each_entry(hidinput, &hid->inputs, list)
1729                 input_sync(hidinput->input);
1730 }
1731 EXPORT_SYMBOL_GPL(hidinput_report_event);
1732
1733 static int hidinput_find_field(struct hid_device *hid, unsigned int type,
1734                                unsigned int code, struct hid_field **field)
1735 {
1736         struct hid_report *report;
1737         int i, j;
1738
1739         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
1740                 for (i = 0; i < report->maxfield; i++) {
1741                         *field = report->field[i];
1742                         for (j = 0; j < (*field)->maxusage; j++)
1743                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
1744                                         return j;
1745                 }
1746         }
1747         return -1;
1748 }
1749
1750 struct hid_field *hidinput_get_led_field(struct hid_device *hid)
1751 {
1752         struct hid_report *report;
1753         struct hid_field *field;
1754         int i, j;
1755
1756         list_for_each_entry(report,
1757                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1758                             list) {
1759                 for (i = 0; i < report->maxfield; i++) {
1760                         field = report->field[i];
1761                         for (j = 0; j < field->maxusage; j++)
1762                                 if (field->usage[j].type == EV_LED)
1763                                         return field;
1764                 }
1765         }
1766         return NULL;
1767 }
1768 EXPORT_SYMBOL_GPL(hidinput_get_led_field);
1769
1770 unsigned int hidinput_count_leds(struct hid_device *hid)
1771 {
1772         struct hid_report *report;
1773         struct hid_field *field;
1774         int i, j;
1775         unsigned int count = 0;
1776
1777         list_for_each_entry(report,
1778                             &hid->report_enum[HID_OUTPUT_REPORT].report_list,
1779                             list) {
1780                 for (i = 0; i < report->maxfield; i++) {
1781                         field = report->field[i];
1782                         for (j = 0; j < field->maxusage; j++)
1783                                 if (field->usage[j].type == EV_LED &&
1784                                     field->value[j])
1785                                         count += 1;
1786                 }
1787         }
1788         return count;
1789 }
1790 EXPORT_SYMBOL_GPL(hidinput_count_leds);
1791
1792 static void hidinput_led_worker(struct work_struct *work)
1793 {
1794         struct hid_device *hid = container_of(work, struct hid_device,
1795                                               led_work);
1796         struct hid_field *field;
1797         struct hid_report *report;
1798         int ret;
1799         u32 len;
1800         __u8 *buf;
1801
1802         field = hidinput_get_led_field(hid);
1803         if (!field)
1804                 return;
1805
1806         /*
1807          * field->report is accessed unlocked regarding HID core. So there might
1808          * be another incoming SET-LED request from user-space, which changes
1809          * the LED state while we assemble our outgoing buffer. However, this
1810          * doesn't matter as hid_output_report() correctly converts it into a
1811          * boolean value no matter what information is currently set on the LED
1812          * field (even garbage). So the remote device will always get a valid
1813          * request.
1814          * And in case we send a wrong value, a next led worker is spawned
1815          * for every SET-LED request so the following worker will send the
1816          * correct value, guaranteed!
1817          */
1818
1819         report = field->report;
1820
1821         /* use custom SET_REPORT request if possible (asynchronous) */
1822         if (hid->ll_driver->request)
1823                 return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
1824
1825         /* fall back to generic raw-output-report */
1826         len = hid_report_len(report);
1827         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1828         if (!buf)
1829                 return;
1830
1831         hid_output_report(report, buf);
1832         /* synchronous output report */
1833         ret = hid_hw_output_report(hid, buf, len);
1834         if (ret == -ENOSYS)
1835                 hid_hw_raw_request(hid, report->id, buf, len, HID_OUTPUT_REPORT,
1836                                 HID_REQ_SET_REPORT);
1837         kfree(buf);
1838 }
1839
1840 static int hidinput_input_event(struct input_dev *dev, unsigned int type,
1841                                 unsigned int code, int value)
1842 {
1843         struct hid_device *hid = input_get_drvdata(dev);
1844         struct hid_field *field;
1845         int offset;
1846
1847         if (type == EV_FF)
1848                 return input_ff_event(dev, type, code, value);
1849
1850         if (type != EV_LED)
1851                 return -1;
1852
1853         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
1854                 hid_warn(dev, "event field not found\n");
1855                 return -1;
1856         }
1857
1858         hid_set_field(field, offset, value);
1859
1860         schedule_work(&hid->led_work);
1861         return 0;
1862 }
1863
1864 static int hidinput_open(struct input_dev *dev)
1865 {
1866         struct hid_device *hid = input_get_drvdata(dev);
1867
1868         return hid_hw_open(hid);
1869 }
1870
1871 static void hidinput_close(struct input_dev *dev)
1872 {
1873         struct hid_device *hid = input_get_drvdata(dev);
1874
1875         hid_hw_close(hid);
1876 }
1877
1878 static bool __hidinput_change_resolution_multipliers(struct hid_device *hid,
1879                 struct hid_report *report, bool use_logical_max)
1880 {
1881         struct hid_usage *usage;
1882         bool update_needed = false;
1883         bool get_report_completed = false;
1884         int i, j;
1885
1886         if (report->maxfield == 0)
1887                 return false;
1888
1889         for (i = 0; i < report->maxfield; i++) {
1890                 __s32 value = use_logical_max ?
1891                               report->field[i]->logical_maximum :
1892                               report->field[i]->logical_minimum;
1893
1894                 /* There is no good reason for a Resolution
1895                  * Multiplier to have a count other than 1.
1896                  * Ignore that case.
1897                  */
1898                 if (report->field[i]->report_count != 1)
1899                         continue;
1900
1901                 for (j = 0; j < report->field[i]->maxusage; j++) {
1902                         usage = &report->field[i]->usage[j];
1903
1904                         if (usage->hid != HID_GD_RESOLUTION_MULTIPLIER)
1905                                 continue;
1906
1907                         /*
1908                          * If we have more than one feature within this
1909                          * report we need to fill in the bits from the
1910                          * others before we can overwrite the ones for the
1911                          * Resolution Multiplier.
1912                          *
1913                          * But if we're not allowed to read from the device,
1914                          * we just bail. Such a device should not exist
1915                          * anyway.
1916                          */
1917                         if (!get_report_completed && report->maxfield > 1) {
1918                                 if (hid->quirks & HID_QUIRK_NO_INIT_REPORTS)
1919                                         return update_needed;
1920
1921                                 hid_hw_request(hid, report, HID_REQ_GET_REPORT);
1922                                 hid_hw_wait(hid);
1923                                 get_report_completed = true;
1924                         }
1925
1926                         report->field[i]->value[j] = value;
1927                         update_needed = true;
1928                 }
1929         }
1930
1931         return update_needed;
1932 }
1933
1934 static void hidinput_change_resolution_multipliers(struct hid_device *hid)
1935 {
1936         struct hid_report_enum *rep_enum;
1937         struct hid_report *rep;
1938         int ret;
1939
1940         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1941         list_for_each_entry(rep, &rep_enum->report_list, list) {
1942                 bool update_needed = __hidinput_change_resolution_multipliers(hid,
1943                                                                      rep, true);
1944
1945                 if (update_needed) {
1946                         ret = __hid_request(hid, rep, HID_REQ_SET_REPORT);
1947                         if (ret) {
1948                                 __hidinput_change_resolution_multipliers(hid,
1949                                                                     rep, false);
1950                                 return;
1951                         }
1952                 }
1953         }
1954
1955         /* refresh our structs */
1956         hid_setup_resolution_multiplier(hid);
1957 }
1958
1959 static void report_features(struct hid_device *hid)
1960 {
1961         struct hid_driver *drv = hid->driver;
1962         struct hid_report_enum *rep_enum;
1963         struct hid_report *rep;
1964         struct hid_usage *usage;
1965         int i, j;
1966
1967         rep_enum = &hid->report_enum[HID_FEATURE_REPORT];
1968         list_for_each_entry(rep, &rep_enum->report_list, list)
1969                 for (i = 0; i < rep->maxfield; i++) {
1970                         /* Ignore if report count is out of bounds. */
1971                         if (rep->field[i]->report_count < 1)
1972                                 continue;
1973
1974                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1975                                 usage = &rep->field[i]->usage[j];
1976
1977                                 /* Verify if Battery Strength feature is available */
1978                                 if (usage->hid == HID_DC_BATTERYSTRENGTH)
1979                                         hidinput_setup_battery(hid, HID_FEATURE_REPORT,
1980                                                                rep->field[i], false);
1981
1982                                 if (drv->feature_mapping)
1983                                         drv->feature_mapping(hid, rep->field[i], usage);
1984                         }
1985                 }
1986 }
1987
1988 static struct hid_input *hidinput_allocate(struct hid_device *hid,
1989                                            unsigned int application)
1990 {
1991         struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1992         struct input_dev *input_dev = input_allocate_device();
1993         const char *suffix = NULL;
1994         size_t suffix_len, name_len;
1995
1996         if (!hidinput || !input_dev)
1997                 goto fail;
1998
1999         if ((hid->quirks & HID_QUIRK_INPUT_PER_APP) &&
2000             hid->maxapplication > 1) {
2001                 switch (application) {
2002                 case HID_GD_KEYBOARD:
2003                         suffix = "Keyboard";
2004                         break;
2005                 case HID_GD_KEYPAD:
2006                         suffix = "Keypad";
2007                         break;
2008                 case HID_GD_MOUSE:
2009                         suffix = "Mouse";
2010                         break;
2011                 case HID_DG_PEN:
2012                         /*
2013                          * yes, there is an issue here:
2014                          *  DG_PEN -> "Stylus"
2015                          *  DG_STYLUS -> "Pen"
2016                          * But changing this now means users with config snippets
2017                          * will have to change it and the test suite will not be happy.
2018                          */
2019                         suffix = "Stylus";
2020                         break;
2021                 case HID_DG_STYLUS:
2022                         suffix = "Pen";
2023                         break;
2024                 case HID_DG_TOUCHSCREEN:
2025                         suffix = "Touchscreen";
2026                         break;
2027                 case HID_DG_TOUCHPAD:
2028                         suffix = "Touchpad";
2029                         break;
2030                 case HID_GD_SYSTEM_CONTROL:
2031                         suffix = "System Control";
2032                         break;
2033                 case HID_CP_CONSUMER_CONTROL:
2034                         suffix = "Consumer Control";
2035                         break;
2036                 case HID_GD_WIRELESS_RADIO_CTLS:
2037                         suffix = "Wireless Radio Control";
2038                         break;
2039                 case HID_GD_SYSTEM_MULTIAXIS:
2040                         suffix = "System Multi Axis";
2041                         break;
2042                 default:
2043                         break;
2044                 }
2045         }
2046
2047         if (suffix) {
2048                 name_len = strlen(hid->name);
2049                 suffix_len = strlen(suffix);
2050                 if ((name_len < suffix_len) ||
2051                     strcmp(hid->name + name_len - suffix_len, suffix)) {
2052                         hidinput->name = kasprintf(GFP_KERNEL, "%s %s",
2053                                                    hid->name, suffix);
2054                         if (!hidinput->name)
2055                                 goto fail;
2056                 }
2057         }
2058
2059         input_set_drvdata(input_dev, hid);
2060         input_dev->event = hidinput_input_event;
2061         input_dev->open = hidinput_open;
2062         input_dev->close = hidinput_close;
2063         input_dev->setkeycode = hidinput_setkeycode;
2064         input_dev->getkeycode = hidinput_getkeycode;
2065
2066         input_dev->name = hidinput->name ? hidinput->name : hid->name;
2067         input_dev->phys = hid->phys;
2068         input_dev->uniq = hid->uniq;
2069         input_dev->id.bustype = hid->bus;
2070         input_dev->id.vendor  = hid->vendor;
2071         input_dev->id.product = hid->product;
2072         input_dev->id.version = hid->version;
2073         input_dev->dev.parent = &hid->dev;
2074
2075         hidinput->input = input_dev;
2076         hidinput->application = application;
2077         list_add_tail(&hidinput->list, &hid->inputs);
2078
2079         INIT_LIST_HEAD(&hidinput->reports);
2080
2081         return hidinput;
2082
2083 fail:
2084         kfree(hidinput);
2085         input_free_device(input_dev);
2086         hid_err(hid, "Out of memory during hid input probe\n");
2087         return NULL;
2088 }
2089
2090 static bool hidinput_has_been_populated(struct hid_input *hidinput)
2091 {
2092         int i;
2093         unsigned long r = 0;
2094
2095         for (i = 0; i < BITS_TO_LONGS(EV_CNT); i++)
2096                 r |= hidinput->input->evbit[i];
2097
2098         for (i = 0; i < BITS_TO_LONGS(KEY_CNT); i++)
2099                 r |= hidinput->input->keybit[i];
2100
2101         for (i = 0; i < BITS_TO_LONGS(REL_CNT); i++)
2102                 r |= hidinput->input->relbit[i];
2103
2104         for (i = 0; i < BITS_TO_LONGS(ABS_CNT); i++)
2105                 r |= hidinput->input->absbit[i];
2106
2107         for (i = 0; i < BITS_TO_LONGS(MSC_CNT); i++)
2108                 r |= hidinput->input->mscbit[i];
2109
2110         for (i = 0; i < BITS_TO_LONGS(LED_CNT); i++)
2111                 r |= hidinput->input->ledbit[i];
2112
2113         for (i = 0; i < BITS_TO_LONGS(SND_CNT); i++)
2114                 r |= hidinput->input->sndbit[i];
2115
2116         for (i = 0; i < BITS_TO_LONGS(FF_CNT); i++)
2117                 r |= hidinput->input->ffbit[i];
2118
2119         for (i = 0; i < BITS_TO_LONGS(SW_CNT); i++)
2120                 r |= hidinput->input->swbit[i];
2121
2122         return !!r;
2123 }
2124
2125 static void hidinput_cleanup_hidinput(struct hid_device *hid,
2126                 struct hid_input *hidinput)
2127 {
2128         struct hid_report *report;
2129         int i, k;
2130
2131         list_del(&hidinput->list);
2132         input_free_device(hidinput->input);
2133         kfree(hidinput->name);
2134
2135         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2136                 if (k == HID_OUTPUT_REPORT &&
2137                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2138                         continue;
2139
2140                 list_for_each_entry(report, &hid->report_enum[k].report_list,
2141                                     list) {
2142
2143                         for (i = 0; i < report->maxfield; i++)
2144                                 if (report->field[i]->hidinput == hidinput)
2145                                         report->field[i]->hidinput = NULL;
2146                 }
2147         }
2148
2149         kfree(hidinput);
2150 }
2151
2152 static struct hid_input *hidinput_match(struct hid_report *report)
2153 {
2154         struct hid_device *hid = report->device;
2155         struct hid_input *hidinput;
2156
2157         list_for_each_entry(hidinput, &hid->inputs, list) {
2158                 if (hidinput->report &&
2159                     hidinput->report->id == report->id)
2160                         return hidinput;
2161         }
2162
2163         return NULL;
2164 }
2165
2166 static struct hid_input *hidinput_match_application(struct hid_report *report)
2167 {
2168         struct hid_device *hid = report->device;
2169         struct hid_input *hidinput;
2170
2171         list_for_each_entry(hidinput, &hid->inputs, list) {
2172                 if (hidinput->application == report->application)
2173                         return hidinput;
2174
2175                 /*
2176                  * Keep SystemControl and ConsumerControl applications together
2177                  * with the main keyboard, if present.
2178                  */
2179                 if ((report->application == HID_GD_SYSTEM_CONTROL ||
2180                      report->application == HID_CP_CONSUMER_CONTROL) &&
2181                     hidinput->application == HID_GD_KEYBOARD) {
2182                         return hidinput;
2183                 }
2184         }
2185
2186         return NULL;
2187 }
2188
2189 static inline void hidinput_configure_usages(struct hid_input *hidinput,
2190                                              struct hid_report *report)
2191 {
2192         int i, j, k;
2193         int first_field_index = 0;
2194         int slot_collection_index = -1;
2195         int prev_collection_index = -1;
2196         unsigned int slot_idx = 0;
2197         struct hid_field *field;
2198
2199         /*
2200          * First tag all the fields that are part of a slot,
2201          * a slot needs to have one Contact ID in the collection
2202          */
2203         for (i = 0; i < report->maxfield; i++) {
2204                 field = report->field[i];
2205
2206                 /* ignore fields without usage */
2207                 if (field->maxusage < 1)
2208                         continue;
2209
2210                 /*
2211                  * janitoring when collection_index changes
2212                  */
2213                 if (prev_collection_index != field->usage->collection_index) {
2214                         prev_collection_index = field->usage->collection_index;
2215                         first_field_index = i;
2216                 }
2217
2218                 /*
2219                  * if we already found a Contact ID in the collection,
2220                  * tag and continue to the next.
2221                  */
2222                 if (slot_collection_index == field->usage->collection_index) {
2223                         field->slot_idx = slot_idx;
2224                         continue;
2225                 }
2226
2227                 /* check if the current field has Contact ID */
2228                 for (j = 0; j < field->maxusage; j++) {
2229                         if (field->usage[j].hid == HID_DG_CONTACTID) {
2230                                 slot_collection_index = field->usage->collection_index;
2231                                 slot_idx++;
2232
2233                                 /*
2234                                  * mark all previous fields and this one in the
2235                                  * current collection to be slotted.
2236                                  */
2237                                 for (k = first_field_index; k <= i; k++)
2238                                         report->field[k]->slot_idx = slot_idx;
2239                                 break;
2240                         }
2241                 }
2242         }
2243
2244         for (i = 0; i < report->maxfield; i++)
2245                 for (j = 0; j < report->field[i]->maxusage; j++)
2246                         hidinput_configure_usage(hidinput, report->field[i],
2247                                                  report->field[i]->usage + j,
2248                                                  j);
2249 }
2250
2251 /*
2252  * Register the input device; print a message.
2253  * Configure the input layer interface
2254  * Read all reports and initialize the absolute field values.
2255  */
2256
2257 int hidinput_connect(struct hid_device *hid, unsigned int force)
2258 {
2259         struct hid_driver *drv = hid->driver;
2260         struct hid_report *report;
2261         struct hid_input *next, *hidinput = NULL;
2262         unsigned int application;
2263         int i, k;
2264
2265         INIT_LIST_HEAD(&hid->inputs);
2266         INIT_WORK(&hid->led_work, hidinput_led_worker);
2267
2268         hid->status &= ~HID_STAT_DUP_DETECTED;
2269
2270         if (!force) {
2271                 for (i = 0; i < hid->maxcollection; i++) {
2272                         struct hid_collection *col = &hid->collection[i];
2273                         if (col->type == HID_COLLECTION_APPLICATION ||
2274                                         col->type == HID_COLLECTION_PHYSICAL)
2275                                 if (IS_INPUT_APPLICATION(col->usage))
2276                                         break;
2277                 }
2278
2279                 if (i == hid->maxcollection)
2280                         return -1;
2281         }
2282
2283         report_features(hid);
2284
2285         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
2286                 if (k == HID_OUTPUT_REPORT &&
2287                         hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
2288                         continue;
2289
2290                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
2291
2292                         if (!report->maxfield)
2293                                 continue;
2294
2295                         application = report->application;
2296
2297                         /*
2298                          * Find the previous hidinput report attached
2299                          * to this report id.
2300                          */
2301                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2302                                 hidinput = hidinput_match(report);
2303                         else if (hid->maxapplication > 1 &&
2304                                  (hid->quirks & HID_QUIRK_INPUT_PER_APP))
2305                                 hidinput = hidinput_match_application(report);
2306
2307                         if (!hidinput) {
2308                                 hidinput = hidinput_allocate(hid, application);
2309                                 if (!hidinput)
2310                                         goto out_unwind;
2311                         }
2312
2313                         hidinput_configure_usages(hidinput, report);
2314
2315                         if (hid->quirks & HID_QUIRK_MULTI_INPUT)
2316                                 hidinput->report = report;
2317
2318                         list_add_tail(&report->hidinput_list,
2319                                       &hidinput->reports);
2320                 }
2321         }
2322
2323         hidinput_change_resolution_multipliers(hid);
2324
2325         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2326                 if (drv->input_configured &&
2327                     drv->input_configured(hid, hidinput))
2328                         goto out_unwind;
2329
2330                 if (!hidinput_has_been_populated(hidinput)) {
2331                         /* no need to register an input device not populated */
2332                         hidinput_cleanup_hidinput(hid, hidinput);
2333                         continue;
2334                 }
2335
2336                 if (input_register_device(hidinput->input))
2337                         goto out_unwind;
2338                 hidinput->registered = true;
2339         }
2340
2341         if (list_empty(&hid->inputs)) {
2342                 hid_err(hid, "No inputs registered, leaving\n");
2343                 goto out_unwind;
2344         }
2345
2346         if (hid->status & HID_STAT_DUP_DETECTED)
2347                 hid_dbg(hid,
2348                         "Some usages could not be mapped, please use HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE if this is legitimate.\n");
2349
2350         return 0;
2351
2352 out_unwind:
2353         /* unwind the ones we already registered */
2354         hidinput_disconnect(hid);
2355
2356         return -1;
2357 }
2358 EXPORT_SYMBOL_GPL(hidinput_connect);
2359
2360 void hidinput_disconnect(struct hid_device *hid)
2361 {
2362         struct hid_input *hidinput, *next;
2363
2364         hidinput_cleanup_battery(hid);
2365
2366         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
2367                 list_del(&hidinput->list);
2368                 if (hidinput->registered)
2369                         input_unregister_device(hidinput->input);
2370                 else
2371                         input_free_device(hidinput->input);
2372                 kfree(hidinput->name);
2373                 kfree(hidinput);
2374         }
2375
2376         /* led_work is spawned by input_dev callbacks, but doesn't access the
2377          * parent input_dev at all. Once all input devices are removed, we
2378          * know that led_work will never get restarted, so we can cancel it
2379          * synchronously and are safe. */
2380         cancel_work_sync(&hid->led_work);
2381 }
2382 EXPORT_SYMBOL_GPL(hidinput_disconnect);
2383
2384 #ifdef CONFIG_HID_KUNIT_TEST
2385 #include "hid-input-test.c"
2386 #endif