drivers/hid/hid-input.c

   1 /*
   2  * $Id: hid-input.c,v 1.2 2002/04/23 00:59:25 rdamazio Exp $
   3  *
   4  *  Copyright (c) 2000-2001 Vojtech Pavlik
   5  *  Copyright (c) 2006-2007 Jiri Kosina
   6  *
   7  *  HID to Linux Input mapping
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  *
  25  * Should you need to contact me, the author, you can do so either by
  26  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  27  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/slab.h>
  32 #include <linux/kernel.h>
  33
  34 #include <linux/hid.h>
  35 #include <linux/hid-debug.h>
  36
  37 static int hid_apple_fnmode = 1;
  38 module_param_named(pb_fnmode, hid_apple_fnmode, int, 0644);
  39 MODULE_PARM_DESC(pb_fnmode,
  40                 "Mode of fn key on Apple keyboards (0 = disabled, 1 = fkeyslast, 2 = fkeysfirst)");
  41
  42 #define unk     KEY_UNKNOWN
  43
  44 static const unsigned char hid_keyboard[256] = {
  45           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  46          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  47           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  48          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  49          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  50         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  51          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  52         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  53         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  54         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  55         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  56         unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
  57         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  58         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  59          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  60         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  61 };
  62
  63 /* extended mapping for certain Logitech hardware (Logitech cordless desktop LX500) */
  64 #define LOGITECH_EXPANDED_KEYMAP_SIZE 80
  65 static int logitech_expanded_keymap[LOGITECH_EXPANDED_KEYMAP_SIZE] = {
  66           0,216,  0,213,175,156,  0,  0,  0,  0,
  67         144,  0,  0,  0,  0,  0,  0,  0,  0,212,
  68         174,167,152,161,112,  0,  0,  0,154,  0,
  69           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  70           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  71           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  72           0,  0,  0,  0,  0,183,184,185,186,187,
  73         188,189,190,191,192,193,194,  0,  0,  0
  74 };
  75
  76 static const struct {
  77         __s32 x;
  78         __s32 y;
  79 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  80
  81 #define map_abs(c)      do { usage->code = c; usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX; } while (0)
  82 #define map_rel(c)      do { usage->code = c; usage->type = EV_REL; bit = input->relbit; max = REL_MAX; } while (0)
  83 #define map_key(c)      do { usage->code = c; usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX; } while (0)
  84 #define map_led(c)      do { usage->code = c; usage->type = EV_LED; bit = input->ledbit; max = LED_MAX; } while (0)
  85
  86 #define map_abs_clear(c)        do { map_abs(c); clear_bit(c, bit); } while (0)
  87 #define map_key_clear(c)        do { map_key(c); clear_bit(c, bit); } while (0)
  88
  89 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
  90
  91 struct hidinput_key_translation {
  92         u16 from;
  93         u16 to;
  94         u8 flags;
  95 };
  96
  97 #define APPLE_FLAG_FKEY 0x01
  98
  99 static struct hidinput_key_translation apple_fn_keys[] = {
 100         { KEY_F1,       KEY_BRIGHTNESSDOWN,     APPLE_FLAG_FKEY },
 101         { KEY_F2,       KEY_BRIGHTNESSUP,       APPLE_FLAG_FKEY },
 102         { KEY_F3,       KEY_CYCLEWINDOWS,       APPLE_FLAG_FKEY }, /* Exposé */
 103         { KEY_F4,       KEY_FN_F4,              APPLE_FLAG_FKEY }, /* Dashboard */
 104         { KEY_F5,       KEY_FN_F5 },
 105         { KEY_F6,       KEY_FN_F6 },
 106         { KEY_F7,       KEY_BACK,               APPLE_FLAG_FKEY },
 107         { KEY_F8,       KEY_PLAYPAUSE,          APPLE_FLAG_FKEY },
 108         { KEY_F9,       KEY_FORWARD,            APPLE_FLAG_FKEY },
 109         { KEY_F10,      KEY_MUTE,               APPLE_FLAG_FKEY },
 110         { KEY_F11,      KEY_VOLUMEDOWN,         APPLE_FLAG_FKEY },
 111         { KEY_F12,      KEY_VOLUMEUP,           APPLE_FLAG_FKEY },
 112         { }
 113 };
 114
 115 static struct hidinput_key_translation powerbook_fn_keys[] = {
 116         { KEY_BACKSPACE, KEY_DELETE },
 117         { KEY_F1,       KEY_BRIGHTNESSDOWN,     APPLE_FLAG_FKEY },
 118         { KEY_F2,       KEY_BRIGHTNESSUP,       APPLE_FLAG_FKEY },
 119         { KEY_F3,       KEY_MUTE,               APPLE_FLAG_FKEY },
 120         { KEY_F4,       KEY_VOLUMEDOWN,         APPLE_FLAG_FKEY },
 121         { KEY_F5,       KEY_VOLUMEUP,           APPLE_FLAG_FKEY },
 122         { KEY_F6,       KEY_NUMLOCK,            APPLE_FLAG_FKEY },
 123         { KEY_F7,       KEY_SWITCHVIDEOMODE,    APPLE_FLAG_FKEY },
 124         { KEY_F8,       KEY_KBDILLUMTOGGLE,     APPLE_FLAG_FKEY },
 125         { KEY_F9,       KEY_KBDILLUMDOWN,       APPLE_FLAG_FKEY },
 126         { KEY_F10,      KEY_KBDILLUMUP,         APPLE_FLAG_FKEY },
 127         { KEY_UP,       KEY_PAGEUP },
 128         { KEY_DOWN,     KEY_PAGEDOWN },
 129         { KEY_LEFT,     KEY_HOME },
 130         { KEY_RIGHT,    KEY_END },
 131         { }
 132 };
 133
 134 static struct hidinput_key_translation powerbook_numlock_keys[] = {
 135         { KEY_J,        KEY_KP1 },
 136         { KEY_K,        KEY_KP2 },
 137         { KEY_L,        KEY_KP3 },
 138         { KEY_U,        KEY_KP4 },
 139         { KEY_I,        KEY_KP5 },
 140         { KEY_O,        KEY_KP6 },
 141         { KEY_7,        KEY_KP7 },
 142         { KEY_8,        KEY_KP8 },
 143         { KEY_9,        KEY_KP9 },
 144         { KEY_M,        KEY_KP0 },
 145         { KEY_DOT,      KEY_KPDOT },
 146         { KEY_SLASH,    KEY_KPPLUS },
 147         { KEY_SEMICOLON, KEY_KPMINUS },
 148         { KEY_P,        KEY_KPASTERISK },
 149         { KEY_MINUS,    KEY_KPEQUAL },
 150         { KEY_0,        KEY_KPSLASH },
 151         { KEY_F6,       KEY_NUMLOCK },
 152         { KEY_KPENTER,  KEY_KPENTER },
 153         { KEY_BACKSPACE, KEY_BACKSPACE },
 154         { }
 155 };
 156
 157 static struct hidinput_key_translation apple_iso_keyboard[] = {
 158         { KEY_GRAVE,    KEY_102ND },
 159         { KEY_102ND,    KEY_GRAVE },
 160         { }
 161 };
 162
 163 static struct hidinput_key_translation *find_translation(struct hidinput_key_translation *table, u16 from)
 164 {
 165         struct hidinput_key_translation *trans;
 166
 167         /* Look for the translation */
 168         for (trans = table; trans->from; trans++)
 169                 if (trans->from == from)
 170                         return trans;
 171
 172         return NULL;
 173 }
 174
 175 int hidinput_apple_event(struct hid_device *hid, struct input_dev *input,
 176                 struct hid_usage *usage, __s32 value)
 177 {
 178         struct hidinput_key_translation *trans;
 179
 180         if (usage->code == KEY_FN) {
 181                 if (value) hid->quirks |=  HID_QUIRK_APPLE_FN_ON;
 182                 else       hid->quirks &= ~HID_QUIRK_APPLE_FN_ON;
 183
 184                 input_event(input, usage->type, usage->code, value);
 185
 186                 return 1;
 187         }
 188
 189         if (hid_apple_fnmode) {
 190                 int do_translate;
 191
 192                 trans = find_translation((hid->product < 0x220 ||
 193                                           hid->product >= 0x300) ?
 194                                          powerbook_fn_keys : apple_fn_keys,
 195                                          usage->code);
 196                 if (trans) {
 197                         if (test_bit(usage->code, hid->apple_pressed_fn))
 198                                 do_translate = 1;
 199                         else if (trans->flags & APPLE_FLAG_FKEY)
 200                                 do_translate =
 201                                         (hid_apple_fnmode == 2 &&  (hid->quirks & HID_QUIRK_APPLE_FN_ON)) ||
 202                                         (hid_apple_fnmode == 1 && !(hid->quirks & HID_QUIRK_APPLE_FN_ON));
 203                         else
 204                                 do_translate = (hid->quirks & HID_QUIRK_APPLE_FN_ON);
 205
 206                         if (do_translate) {
 207                                 if (value)
 208                                         set_bit(usage->code, hid->apple_pressed_fn);
 209                                 else
 210                                         clear_bit(usage->code, hid->apple_pressed_fn);
 211
 212                                 input_event(input, usage->type, trans->to, value);
 213
 214                                 return 1;
 215                         }
 216                 }
 217
 218                 if (test_bit(usage->code, hid->pb_pressed_numlock) ||
 219                                 test_bit(LED_NUML, input->led)) {
 220                         trans = find_translation(powerbook_numlock_keys, usage->code);
 221
 222                         if (trans) {
 223                                 if (value)
 224                                         set_bit(usage->code, hid->pb_pressed_numlock);
 225                                 else
 226                                         clear_bit(usage->code, hid->pb_pressed_numlock);
 227
 228                                 input_event(input, usage->type, trans->to, value);
 229                         }
 230
 231                         return 1;
 232                 }
 233         }
 234
 235         if (hid->quirks & HID_QUIRK_APPLE_ISO_KEYBOARD) {
 236                 trans = find_translation(apple_iso_keyboard, usage->code);
 237                 if (trans) {
 238                         input_event(input, usage->type, trans->to, value);
 239                         return 1;
 240                 }
 241         }
 242
 243         return 0;
 244 }
 245
 246 static void hidinput_apple_setup(struct input_dev *input)
 247 {
 248         struct hidinput_key_translation *trans;
 249
 250         set_bit(KEY_NUMLOCK, input->keybit);
 251
 252         /* Enable all needed keys */
 253         for (trans = apple_fn_keys; trans->from; trans++)
 254                 set_bit(trans->to, input->keybit);
 255
 256         for (trans = powerbook_fn_keys; trans->from; trans++)
 257                 set_bit(trans->to, input->keybit);
 258
 259         for (trans = powerbook_numlock_keys; trans->from; trans++)
 260                 set_bit(trans->to, input->keybit);
 261
 262         for (trans = apple_iso_keyboard; trans->from; trans++)
 263                 set_bit(trans->to, input->keybit);
 264
 265 }
 266 #else
 267 inline int hidinput_apple_event(struct hid_device *hid,
 268                                        struct input_dev *input,
 269                                        struct hid_usage *usage, __s32 value)
 270 {
 271         return 0;
 272 }
 273
 274 static inline void hidinput_apple_setup(struct input_dev *input)
 275 {
 276 }
 277 #endif
 278
 279 static inline int match_scancode(int code, int scancode)
 280 {
 281         if (scancode == 0)
 282                 return 1;
 283         return ((code & (HID_USAGE_PAGE | HID_USAGE)) == scancode);
 284 }
 285
 286 static inline int match_keycode(int code, int keycode)
 287 {
 288         if (keycode == 0)
 289                 return 1;
 290         return (code == keycode);
 291 }
 292
 293 static struct hid_usage *hidinput_find_key(struct hid_device *hid,
 294                 int scancode, int keycode)
 295 {
 296         int i, j, k;
 297         struct hid_report *report;
 298         struct hid_usage *usage;
 299
 300         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
 301                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 302                         for (i = 0; i < report->maxfield; i++) {
 303                                 for ( j = 0; j < report->field[i]->maxusage; j++) {
 304                                         usage = report->field[i]->usage + j;
 305                                         if (usage->type == EV_KEY &&
 306                                                 match_scancode(usage->hid, scancode) &&
 307                                                 match_keycode(usage->code, keycode))
 308                                                 return usage;
 309                                 }
 310                         }
 311                 }
 312         }
 313         return NULL;
 314 }
 315
 316 static int hidinput_getkeycode(struct input_dev *dev, int scancode,
 317                                 int *keycode)
 318 {
 319         struct hid_device *hid = input_get_drvdata(dev);
 320         struct hid_usage *usage;
 321
 322         usage = hidinput_find_key(hid, scancode, 0);
 323         if (usage) {
 324                 *keycode = usage->code;
 325                 return 0;
 326         }
 327         return -EINVAL;
 328 }
 329
 330 static int hidinput_setkeycode(struct input_dev *dev, int scancode,
 331                                 int keycode)
 332 {
 333         struct hid_device *hid = input_get_drvdata(dev);
 334         struct hid_usage *usage;
 335         int old_keycode;
 336
 337         if (keycode < 0 || keycode > KEY_MAX)
 338                 return -EINVAL;
 339
 340         usage = hidinput_find_key(hid, scancode, 0);
 341         if (usage) {
 342                 old_keycode = usage->code;
 343                 usage->code = keycode;
 344
 345                 clear_bit(old_keycode, dev->keybit);
 346                 set_bit(usage->code, dev->keybit);
 347                 dbg_hid(KERN_DEBUG "Assigned keycode %d to HID usage code %x\n", keycode, scancode);
 348                 /* Set the keybit for the old keycode if the old keycode is used
 349                  * by another key */
 350                 if (hidinput_find_key (hid, 0, old_keycode))
 351                         set_bit(old_keycode, dev->keybit);
 352
 353                 return 0;
 354         }
 355
 356         return -EINVAL;
 357 }
 358
 359
 360 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
 361                                      struct hid_usage *usage)
 362 {
 363         struct input_dev *input = hidinput->input;
 364         struct hid_device *device = input_get_drvdata(input);
 365         int max = 0, code, ret;
 366         unsigned long *bit = NULL;
 367
 368         field->hidinput = hidinput;
 369
 370         dbg_hid("Mapping: ");
 371         hid_resolv_usage(usage->hid);
 372         dbg_hid_line(" ---> ");
 373
 374         if (field->flags & HID_MAIN_ITEM_CONSTANT)
 375                 goto ignore;
 376
 377         /* only LED usages are supported in output fields */
 378         if (field->report_type == HID_OUTPUT_REPORT &&
 379                         (usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
 380                 dbg_hid_line(" [non-LED output field] ");
 381                 goto ignore;
 382         }
 383
 384         /* handle input mappings for quirky devices */
 385         ret = hidinput_mapping_quirks(usage, input, &bit, &max);
 386         if (ret)
 387                 goto mapped;
 388
 389         switch (usage->hid & HID_USAGE_PAGE) {
 390
 391                 case HID_UP_UNDEFINED:
 392                         goto ignore;
 393
 394                 case HID_UP_KEYBOARD:
 395
 396                         set_bit(EV_REP, input->evbit);
 397
 398                         if ((usage->hid & HID_USAGE) < 256) {
 399                                 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 400                                 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 401                         } else
 402                                 map_key(KEY_UNKNOWN);
 403
 404                         break;
 405
 406                 case HID_UP_BUTTON:
 407
 408                         code = ((usage->hid - 1) & 0xf);
 409
 410                         switch (field->application) {
 411                                 case HID_GD_MOUSE:
 412                                 case HID_GD_POINTER:  code += 0x110; break;
 413                                 case HID_GD_JOYSTICK: code += 0x120; break;
 414                                 case HID_GD_GAMEPAD:  code += 0x130; break;
 415                                 default:
 416                                         switch (field->physical) {
 417                                                 case HID_GD_MOUSE:
 418                                                 case HID_GD_POINTER:  code += 0x110; break;
 419                                                 case HID_GD_JOYSTICK: code += 0x120; break;
 420                                                 case HID_GD_GAMEPAD:  code += 0x130; break;
 421                                                 default:              code += 0x100;
 422                                         }
 423                         }
 424
 425                         /* Special handling for Logitech Cordless Desktop */
 426                         if (field->application != HID_GD_MOUSE) {
 427                                 if (device->quirks & HID_QUIRK_LOGITECH_EXPANDED_KEYMAP) {
 428                                         int hid = usage->hid & HID_USAGE;
 429                                         if (hid < LOGITECH_EXPANDED_KEYMAP_SIZE && logitech_expanded_keymap[hid] != 0)
 430                                                 code = logitech_expanded_keymap[hid];
 431                                 }
 432                         } else {
 433                                 if (device->quirks & HID_QUIRK_LOGITECH_IGNORE_DOUBLED_WHEEL) {
 434                                         int hid = usage->hid & HID_USAGE;
 435                                         if (hid == 7 || hid == 8)
 436                                                 goto ignore;
 437                                 }
 438                         }
 439
 440                         map_key(code);
 441                         break;
 442
 443
 444                 case HID_UP_SIMULATION:
 445
 446                         switch (usage->hid & 0xffff) {
 447                                 case 0xba: map_abs(ABS_RUDDER);   break;
 448                                 case 0xbb: map_abs(ABS_THROTTLE); break;
 449                                 case 0xc4: map_abs(ABS_GAS);      break;
 450                                 case 0xc5: map_abs(ABS_BRAKE);    break;
 451                                 case 0xc8: map_abs(ABS_WHEEL);    break;
 452                                 default:   goto ignore;
 453                         }
 454                         break;
 455
 456                 case HID_UP_GENDESK:
 457
 458                         if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 459                                 switch (usage->hid & 0xf) {
 460                                         case 0x1: map_key_clear(KEY_POWER);  break;
 461                                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 462                                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 463                                         default: goto unknown;
 464                                 }
 465                                 break;
 466                         }
 467
 468                         if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 469                                 switch (usage->hid) {
 470                                         case HID_GD_UP:    usage->hat_dir = 1; break;
 471                                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 472                                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 473                                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 474                                         default: goto unknown;
 475                                 }
 476                                 if (field->dpad) {
 477                                         map_abs(field->dpad);
 478                                         goto ignore;
 479                                 }
 480                                 map_abs(ABS_HAT0X);
 481                                 break;
 482                         }
 483
 484                         switch (usage->hid) {
 485
 486                                 /* These usage IDs map directly to the usage codes. */
 487                                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 488                                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 489                                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 490                                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 491                                                 map_rel(usage->hid & 0xf);
 492                                         else
 493                                                 map_abs(usage->hid & 0xf);
 494                                         break;
 495
 496                                 case HID_GD_HATSWITCH:
 497                                         usage->hat_min = field->logical_minimum;
 498                                         usage->hat_max = field->logical_maximum;
 499                                         map_abs(ABS_HAT0X);
 500                                         break;
 501
 502                                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 503                                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 504
 505                                 default: goto unknown;
 506                         }
 507
 508                         break;
 509
 510                 case HID_UP_LED:
 511
 512                         switch (usage->hid & 0xffff) {                        /* HID-Value:                   */
 513                                 case 0x01:  map_led (LED_NUML);     break;    /*   "Num Lock"                 */
 514                                 case 0x02:  map_led (LED_CAPSL);    break;    /*   "Caps Lock"                */
 515                                 case 0x03:  map_led (LED_SCROLLL);  break;    /*   "Scroll Lock"              */
 516                                 case 0x04:  map_led (LED_COMPOSE);  break;    /*   "Compose"                  */
 517                                 case 0x05:  map_led (LED_KANA);     break;    /*   "Kana"                     */
 518                                 case 0x27:  map_led (LED_SLEEP);    break;    /*   "Stand-By"                 */
 519                                 case 0x4c:  map_led (LED_SUSPEND);  break;    /*   "System Suspend"           */
 520                                 case 0x09:  map_led (LED_MUTE);     break;    /*   "Mute"                     */
 521                                 case 0x4b:  map_led (LED_MISC);     break;    /*   "Generic Indicator"        */
 522                                 case 0x19:  map_led (LED_MAIL);     break;    /*   "Message Waiting"          */
 523                                 case 0x4d:  map_led (LED_CHARGING); break;    /*   "External Power Connected" */
 524
 525                                 default: goto ignore;
 526                         }
 527                         break;
 528
 529                 case HID_UP_DIGITIZER:
 530
 531                         switch (usage->hid & 0xff) {
 532
 533                                 case 0x30: /* TipPressure */
 534                                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 535                                                 device->quirks |= HID_QUIRK_NOTOUCH;
 536                                                 set_bit(EV_KEY, input->evbit);
 537                                                 set_bit(BTN_TOUCH, input->keybit);
 538                                         }
 539
 540                                         map_abs_clear(ABS_PRESSURE);
 541                                         break;
 542
 543                                 case 0x32: /* InRange */
 544                                         switch (field->physical & 0xff) {
 545                                                 case 0x21: map_key(BTN_TOOL_MOUSE); break;
 546                                                 case 0x22: map_key(BTN_TOOL_FINGER); break;
 547                                                 default: map_key(BTN_TOOL_PEN); break;
 548                                         }
 549                                         break;
 550
 551                                 case 0x3c: /* Invert */
 552                                         map_key_clear(BTN_TOOL_RUBBER);
 553                                         break;
 554
 555                                 case 0x33: /* Touch */
 556                                 case 0x42: /* TipSwitch */
 557                                 case 0x43: /* TipSwitch2 */
 558                                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 559                                         map_key_clear(BTN_TOUCH);
 560                                         break;
 561
 562                                 case 0x44: /* BarrelSwitch */
 563                                         map_key_clear(BTN_STYLUS);
 564                                         break;
 565
 566                                 default:  goto unknown;
 567                         }
 568                         break;
 569
 570                 case HID_UP_CONSUMER:   /* USB HUT v1.1, pages 56-62 */
 571
 572                         switch (usage->hid & HID_USAGE) {
 573                                 case 0x000: goto ignore;
 574                                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 575                                 case 0x036: map_key_clear(BTN_MISC);            break;
 576
 577                                 case 0x040: map_key_clear(KEY_MENU);            break;
 578                                 case 0x045: map_key_clear(KEY_RADIO);           break;
 579
 580                                 case 0x083: map_key_clear(KEY_LAST);            break;
 581                                 case 0x088: map_key_clear(KEY_PC);              break;
 582                                 case 0x089: map_key_clear(KEY_TV);              break;
 583                                 case 0x08a: map_key_clear(KEY_WWW);             break;
 584                                 case 0x08b: map_key_clear(KEY_DVD);             break;
 585                                 case 0x08c: map_key_clear(KEY_PHONE);           break;
 586                                 case 0x08d: map_key_clear(KEY_PROGRAM);         break;
 587                                 case 0x08e: map_key_clear(KEY_VIDEOPHONE);      break;
 588                                 case 0x08f: map_key_clear(KEY_GAMES);           break;
 589                                 case 0x090: map_key_clear(KEY_MEMO);            break;
 590                                 case 0x091: map_key_clear(KEY_CD);              break;
 591                                 case 0x092: map_key_clear(KEY_VCR);             break;
 592                                 case 0x093: map_key_clear(KEY_TUNER);           break;
 593                                 case 0x094: map_key_clear(KEY_EXIT);            break;
 594                                 case 0x095: map_key_clear(KEY_HELP);            break;
 595                                 case 0x096: map_key_clear(KEY_TAPE);            break;
 596                                 case 0x097: map_key_clear(KEY_TV2);             break;
 597                                 case 0x098: map_key_clear(KEY_SAT);             break;
 598                                 case 0x09a: map_key_clear(KEY_PVR);             break;
 599
 600                                 case 0x09c: map_key_clear(KEY_CHANNELUP);       break;
 601                                 case 0x09d: map_key_clear(KEY_CHANNELDOWN);     break;
 602                                 case 0x0a0: map_key_clear(KEY_VCR2);            break;
 603
 604                                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 605                                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 606                                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 607                                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 608                                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 609                                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 610                                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 611                                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 612                                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 613
 614                                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 615                                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 616                                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 617                                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 618                                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 619                                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 620
 621                                 case 0x182: map_key_clear(KEY_BOOKMARKS);       break;
 622                                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 623                                 case 0x184: map_key_clear(KEY_WORDPROCESSOR);   break;
 624                                 case 0x185: map_key_clear(KEY_EDITOR);          break;
 625                                 case 0x186: map_key_clear(KEY_SPREADSHEET);     break;
 626                                 case 0x187: map_key_clear(KEY_GRAPHICSEDITOR);  break;
 627                                 case 0x188: map_key_clear(KEY_PRESENTATION);    break;
 628                                 case 0x189: map_key_clear(KEY_DATABASE);        break;
 629                                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 630                                 case 0x18b: map_key_clear(KEY_NEWS);            break;
 631                                 case 0x18c: map_key_clear(KEY_VOICEMAIL);       break;
 632                                 case 0x18d: map_key_clear(KEY_ADDRESSBOOK);     break;
 633                                 case 0x18e: map_key_clear(KEY_CALENDAR);        break;
 634                                 case 0x191: map_key_clear(KEY_FINANCE);         break;
 635                                 case 0x192: map_key_clear(KEY_CALC);            break;
 636                                 case 0x194: map_key_clear(KEY_FILE);            break;
 637                                 case 0x196: map_key_clear(KEY_WWW);             break;
 638                                 case 0x19c: map_key_clear(KEY_LOGOFF);          break;
 639                                 case 0x19e: map_key_clear(KEY_COFFEE);          break;
 640                                 case 0x1a6: map_key_clear(KEY_HELP);            break;
 641                                 case 0x1a7: map_key_clear(KEY_DOCUMENTS);       break;
 642                                 case 0x1ab: map_key_clear(KEY_SPELLCHECK);      break;
 643                                 case 0x1b6: map_key_clear(KEY_MEDIA);           break;
 644                                 case 0x1b7: map_key_clear(KEY_SOUND);           break;
 645                                 case 0x1bc: map_key_clear(KEY_MESSENGER);       break;
 646                                 case 0x1bd: map_key_clear(KEY_INFO);            break;
 647                                 case 0x201: map_key_clear(KEY_NEW);             break;
 648                                 case 0x202: map_key_clear(KEY_OPEN);            break;
 649                                 case 0x203: map_key_clear(KEY_CLOSE);           break;
 650                                 case 0x204: map_key_clear(KEY_EXIT);            break;
 651                                 case 0x207: map_key_clear(KEY_SAVE);            break;
 652                                 case 0x208: map_key_clear(KEY_PRINT);           break;
 653                                 case 0x209: map_key_clear(KEY_PROPS);           break;
 654                                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 655                                 case 0x21b: map_key_clear(KEY_COPY);            break;
 656                                 case 0x21c: map_key_clear(KEY_CUT);             break;
 657                                 case 0x21d: map_key_clear(KEY_PASTE);           break;
 658                                 case 0x21f: map_key_clear(KEY_FIND);            break;
 659                                 case 0x221: map_key_clear(KEY_SEARCH);          break;
 660                                 case 0x222: map_key_clear(KEY_GOTO);            break;
 661                                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 662                                 case 0x224: map_key_clear(KEY_BACK);            break;
 663                                 case 0x225: map_key_clear(KEY_FORWARD);         break;
 664                                 case 0x226: map_key_clear(KEY_STOP);            break;
 665                                 case 0x227: map_key_clear(KEY_REFRESH);         break;
 666                                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 667                                 case 0x22d: map_key_clear(KEY_ZOOMIN);          break;
 668                                 case 0x22e: map_key_clear(KEY_ZOOMOUT);         break;
 669                                 case 0x22f: map_key_clear(KEY_ZOOMRESET);       break;
 670                                 case 0x233: map_key_clear(KEY_SCROLLUP);        break;
 671                                 case 0x234: map_key_clear(KEY_SCROLLDOWN);      break;
 672                                 case 0x238: map_rel(REL_HWHEEL);                break;
 673                                 case 0x25f: map_key_clear(KEY_CANCEL);          break;
 674                                 case 0x279: map_key_clear(KEY_REDO);            break;
 675
 676                                 case 0x289: map_key_clear(KEY_REPLY);           break;
 677                                 case 0x28b: map_key_clear(KEY_FORWARDMAIL);     break;
 678                                 case 0x28c: map_key_clear(KEY_SEND);            break;
 679
 680                                 default:    goto ignore;
 681                         }
 682                         break;
 683
 684                 case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 685
 686                         set_bit(EV_REP, input->evbit);
 687                         switch (usage->hid & HID_USAGE) {
 688                                 case 0x021: map_key_clear(KEY_PRINT);           break;
 689                                 case 0x070: map_key_clear(KEY_HP);              break;
 690                                 case 0x071: map_key_clear(KEY_CAMERA);          break;
 691                                 case 0x072: map_key_clear(KEY_SOUND);           break;
 692                                 case 0x073: map_key_clear(KEY_QUESTION);        break;
 693                                 case 0x080: map_key_clear(KEY_EMAIL);           break;
 694                                 case 0x081: map_key_clear(KEY_CHAT);            break;
 695                                 case 0x082: map_key_clear(KEY_SEARCH);          break;
 696                                 case 0x083: map_key_clear(KEY_CONNECT);         break;
 697                                 case 0x084: map_key_clear(KEY_FINANCE);         break;
 698                                 case 0x085: map_key_clear(KEY_SPORT);           break;
 699                                 case 0x086: map_key_clear(KEY_SHOP);            break;
 700                                 default:    goto ignore;
 701                         }
 702                         break;
 703
 704                 case HID_UP_MSVENDOR:
 705
 706                         goto ignore;
 707
 708                 case HID_UP_CUSTOM: /* Reported on Logitech and Apple USB keyboards */
 709
 710                         set_bit(EV_REP, input->evbit);
 711                         switch(usage->hid & HID_USAGE) {
 712                                 case 0x003:
 713                                         /* The fn key on Apple USB keyboards */
 714                                         map_key_clear(KEY_FN);
 715                                         hidinput_apple_setup(input);
 716                                         break;
 717
 718                                 default:    goto ignore;
 719                         }
 720                         break;
 721
 722                 case HID_UP_LOGIVENDOR:
 723
 724                         goto ignore;
 725
 726                 case HID_UP_PID:
 727
 728                         switch(usage->hid & HID_USAGE) {
 729                                 case 0xa4: map_key_clear(BTN_DEAD);     break;
 730                                 default: goto ignore;
 731                         }
 732                         break;
 733
 734                 default:
 735                 unknown:
 736                         if (field->report_size == 1) {
 737                                 if (field->report->type == HID_OUTPUT_REPORT) {
 738                                         map_led(LED_MISC);
 739                                         break;
 740                                 }
 741                                 map_key(BTN_MISC);
 742                                 break;
 743                         }
 744                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 745                                 map_rel(REL_MISC);
 746                                 break;
 747                         }
 748                         map_abs(ABS_MISC);
 749                         break;
 750         }
 751
 752 mapped:
 753         if (device->quirks & HID_QUIRK_MIGHTYMOUSE) {
 754                 if (usage->hid == HID_GD_Z)
 755                         map_rel(REL_HWHEEL);
 756                 else if (usage->code == BTN_1)
 757                         map_key(BTN_2);
 758                 else if (usage->code == BTN_2)
 759                         map_key(BTN_1);
 760         }
 761
 762         if ((device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_7 | HID_QUIRK_2WHEEL_MOUSE_HACK_5 |
 763                         HID_QUIRK_2WHEEL_MOUSE_HACK_B8)) && (usage->type == EV_REL) &&
 764                         (usage->code == REL_WHEEL))
 765                 set_bit(REL_HWHEEL, bit);
 766
 767         if (((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 0x00090005))
 768                 || ((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007)))
 769                 goto ignore;
 770
 771         if ((device->quirks & HID_QUIRK_BAD_RELATIVE_KEYS) &&
 772                 usage->type == EV_KEY && (field->flags & HID_MAIN_ITEM_RELATIVE))
 773                 field->flags &= ~HID_MAIN_ITEM_RELATIVE;
 774
 775         set_bit(usage->type, input->evbit);
 776
 777         if (device->quirks & HID_QUIRK_DUPLICATE_USAGES &&
 778                         (usage->type == EV_KEY ||
 779                          usage->type == EV_REL ||
 780                          usage->type == EV_ABS))
 781                 clear_bit(usage->code, bit);
 782
 783         while (usage->code <= max && test_and_set_bit(usage->code, bit))
 784                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
 785
 786         if (usage->code > max)
 787                 goto ignore;
 788
 789
 790         if (usage->type == EV_ABS) {
 791
 792                 int a = field->logical_minimum;
 793                 int b = field->logical_maximum;
 794
 795                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
 796                         a = field->logical_minimum = 0;
 797                         b = field->logical_maximum = 255;
 798                 }
 799
 800                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
 801                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
 802                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 803
 804         }
 805
 806         if (usage->type == EV_ABS &&
 807             (usage->hat_min < usage->hat_max || usage->hat_dir)) {
 808                 int i;
 809                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
 810                         input_set_abs_params(input, i, -1, 1, 0, 0);
 811                         set_bit(i, input->absbit);
 812                 }
 813                 if (usage->hat_dir && !field->dpad)
 814                         field->dpad = usage->code;
 815         }
 816
 817         /* for those devices which produce Consumer volume usage as relative,
 818          * we emulate pressing volumeup/volumedown appropriate number of times
 819          * in hidinput_hid_event()
 820          */
 821         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
 822                         (usage->code == ABS_VOLUME)) {
 823                 set_bit(KEY_VOLUMEUP, input->keybit);
 824                 set_bit(KEY_VOLUMEDOWN, input->keybit);
 825         }
 826
 827         if (usage->type == EV_KEY) {
 828                 set_bit(EV_MSC, input->evbit);
 829                 set_bit(MSC_SCAN, input->mscbit);
 830         }
 831
 832         hid_resolv_event(usage->type, usage->code);
 833
 834         dbg_hid_line("\n");
 835
 836         return;
 837
 838 ignore:
 839         dbg_hid_line("IGNORED\n");
 840         return;
 841 }
 842
 843 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
 844 {
 845         struct input_dev *input;
 846         unsigned *quirks = &hid->quirks;
 847
 848         if (!field->hidinput)
 849                 return;
 850
 851         input = field->hidinput->input;
 852
 853         if (!usage->type)
 854                 return;
 855
 856         /* handle input events for quirky devices */
 857         hidinput_event_quirks(hid, field, usage, value);
 858
 859         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 860                 int hat_dir = usage->hat_dir;
 861                 if (!hat_dir)
 862                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
 863                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
 864                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
 865                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
 866                 return;
 867         }
 868
 869         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
 870                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
 871                 return;
 872         }
 873
 874         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
 875                 if (value) {
 876                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
 877                         return;
 878                 }
 879                 input_event(input, usage->type, usage->code, 0);
 880                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
 881                 return;
 882         }
 883
 884         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
 885                 int a = field->logical_minimum;
 886                 int b = field->logical_maximum;
 887                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
 888         }
 889
 890         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
 891                 dbg_hid("Maximum Effects - %d\n",value);
 892                 return;
 893         }
 894
 895         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
 896                 dbg_hid("PID Pool Report\n");
 897                 return;
 898         }
 899
 900         if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
 901                 return;
 902
 903         if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
 904                         (usage->code == ABS_VOLUME)) {
 905                 int count = abs(value);
 906                 int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
 907                 int i;
 908
 909                 for (i = 0; i < count; i++) {
 910                         input_event(input, EV_KEY, direction, 1);
 911                         input_sync(input);
 912                         input_event(input, EV_KEY, direction, 0);
 913                         input_sync(input);
 914                 }
 915                 return;
 916         }
 917
 918         /* report the usage code as scancode if the key status has changed */
 919         if (usage->type == EV_KEY && !!test_bit(usage->code, input->key) != value)
 920                 input_event(input, EV_MSC, MSC_SCAN, usage->hid);
 921
 922         input_event(input, usage->type, usage->code, value);
 923
 924         if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
 925                 input_event(input, usage->type, usage->code, 0);
 926 }
 927
 928 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
 929 {
 930         struct hid_input *hidinput;
 931
 932         list_for_each_entry(hidinput, &hid->inputs, list)
 933                 input_sync(hidinput->input);
 934 }
 935 EXPORT_SYMBOL_GPL(hidinput_report_event);
 936
 937 int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
 938 {
 939         struct hid_report *report;
 940         int i, j;
 941
 942         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 943                 for (i = 0; i < report->maxfield; i++) {
 944                         *field = report->field[i];
 945                         for (j = 0; j < (*field)->maxusage; j++)
 946                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
 947                                         return j;
 948                 }
 949         }
 950         return -1;
 951 }
 952 EXPORT_SYMBOL_GPL(hidinput_find_field);
 953
 954 static int hidinput_open(struct input_dev *dev)
 955 {
 956         struct hid_device *hid = input_get_drvdata(dev);
 957
 958         return hid->hid_open(hid);
 959 }
 960
 961 static void hidinput_close(struct input_dev *dev)
 962 {
 963         struct hid_device *hid = input_get_drvdata(dev);
 964
 965         hid->hid_close(hid);
 966 }
 967
 968 /*
 969  * Register the input device; print a message.
 970  * Configure the input layer interface
 971  * Read all reports and initialize the absolute field values.
 972  */
 973
 974 int hidinput_connect(struct hid_device *hid)
 975 {
 976         struct hid_report *report;
 977         struct hid_input *hidinput = NULL;
 978         struct input_dev *input_dev;
 979         int i, j, k;
 980         int max_report_type = HID_OUTPUT_REPORT;
 981
 982         if (hid->quirks & HID_QUIRK_IGNORE_HIDINPUT)
 983                 return -1;
 984
 985         INIT_LIST_HEAD(&hid->inputs);
 986
 987         for (i = 0; i < hid->maxcollection; i++)
 988                 if (hid->collection[i].type == HID_COLLECTION_APPLICATION ||
 989                     hid->collection[i].type == HID_COLLECTION_PHYSICAL)
 990                         if (IS_INPUT_APPLICATION(hid->collection[i].usage))
 991                                 break;
 992
 993         if (i == hid->maxcollection && (hid->quirks & HID_QUIRK_HIDINPUT) == 0)
 994                 return -1;
 995
 996         if (hid->quirks & HID_QUIRK_SKIP_OUTPUT_REPORTS)
 997                 max_report_type = HID_INPUT_REPORT;
 998
 999         for (k = HID_INPUT_REPORT; k <= max_report_type; k++)
1000                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
1001
1002                         if (!report->maxfield)
1003                                 continue;
1004
1005                         if (!hidinput) {
1006                                 hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
1007                                 input_dev = input_allocate_device();
1008                                 if (!hidinput || !input_dev) {
1009                                         kfree(hidinput);
1010                                         input_free_device(input_dev);
1011                                         err_hid("Out of memory during hid input probe");
1012                                         goto out_unwind;
1013                                 }
1014
1015                                 input_set_drvdata(input_dev, hid);
1016                                 input_dev->event = hid->hidinput_input_event;
1017                                 input_dev->open = hidinput_open;
1018                                 input_dev->close = hidinput_close;
1019                                 input_dev->setkeycode = hidinput_setkeycode;
1020                                 input_dev->getkeycode = hidinput_getkeycode;
1021
1022                                 input_dev->name = hid->name;
1023                                 input_dev->phys = hid->phys;
1024                                 input_dev->uniq = hid->uniq;
1025                                 input_dev->id.bustype = hid->bus;
1026                                 input_dev->id.vendor  = hid->vendor;
1027                                 input_dev->id.product = hid->product;
1028                                 input_dev->id.version = hid->version;
1029                                 input_dev->dev.parent = hid->dev;
1030                                 hidinput->input = input_dev;
1031                                 list_add_tail(&hidinput->list, &hid->inputs);
1032                         }
1033
1034                         for (i = 0; i < report->maxfield; i++)
1035                                 for (j = 0; j < report->field[i]->maxusage; j++)
1036                                         hidinput_configure_usage(hidinput, report->field[i],
1037                                                                  report->field[i]->usage + j);
1038
1039                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
1040                                 /* This will leave hidinput NULL, so that it
1041                                  * allocates another one if we have more inputs on
1042                                  * the same interface. Some devices (e.g. Happ's
1043                                  * UGCI) cram a lot of unrelated inputs into the
1044                                  * same interface. */
1045                                 hidinput->report = report;
1046                                 if (input_register_device(hidinput->input))
1047                                         goto out_cleanup;
1048                                 hidinput = NULL;
1049                         }
1050                 }
1051
1052         if (hidinput && input_register_device(hidinput->input))
1053                 goto out_cleanup;
1054
1055         return 0;
1056
1057 out_cleanup:
1058         input_free_device(hidinput->input);
1059         kfree(hidinput);
1060 out_unwind:
1061         /* unwind the ones we already registered */
1062         hidinput_disconnect(hid);
1063
1064         return -1;
1065 }
1066 EXPORT_SYMBOL_GPL(hidinput_connect);
1067
1068 void hidinput_disconnect(struct hid_device *hid)
1069 {
1070         struct hid_input *hidinput, *next;
1071
1072         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
1073                 list_del(&hidinput->list);
1074                 input_unregister_device(hidinput->input);
1075                 kfree(hidinput);
1076         }
1077 }
1078 EXPORT_SYMBOL_GPL(hidinput_disconnect);
1079