drivers/usb/input/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  *
   6  *  USB HID to Linux Input mapping
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/module.h>
  30 #include <linux/slab.h>
  31 #include <linux/kernel.h>
  32 #include <linux/input.h>
  33 #include <linux/usb.h>
  34 #include <linux/usb_input.h>
  35
  36 #undef DEBUG
  37
  38 #include "hid.h"
  39
  40 #define unk     KEY_UNKNOWN
  41
  42 static unsigned char hid_keyboard[256] = {
  43           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  44          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  45           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  46          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  47          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  48         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  49          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  50         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  51         115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
  52         122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  53         unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  54         unk,unk,unk,unk,unk,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,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
  57          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  58         150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
  59 };
  60
  61 static struct {
  62         __s32 x;
  63         __s32 y;
  64 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
  65
  66 #define map_abs(c)      do { usage->code = c; usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX; } while (0)
  67 #define map_rel(c)      do { usage->code = c; usage->type = EV_REL; bit = input->relbit; max = REL_MAX; } while (0)
  68 #define map_key(c)      do { usage->code = c; usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX; } while (0)
  69 #define map_led(c)      do { usage->code = c; usage->type = EV_LED; bit = input->ledbit; max = LED_MAX; } while (0)
  70 #define map_ff(c)       do { usage->code = c; usage->type = EV_FF;  bit = input->ffbit;  max =  FF_MAX; } while (0)
  71
  72 #define map_abs_clear(c)        do { map_abs(c); clear_bit(c, bit); } while (0)
  73 #define map_key_clear(c)        do { map_key(c); clear_bit(c, bit); } while (0)
  74 #define map_ff_effect(c)        do { set_bit(c, input->ffbit); } while (0)
  75
  76 static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_field *field,
  77                                      struct hid_usage *usage)
  78 {
  79         struct input_dev *input = &hidinput->input;
  80         struct hid_device *device = hidinput->input.private;
  81         int max, code;
  82         unsigned long *bit;
  83
  84         field->hidinput = hidinput;
  85
  86 #ifdef DEBUG
  87         printk(KERN_DEBUG "Mapping: ");
  88         resolv_usage(usage->hid);
  89         printk(" ---> ");
  90 #endif
  91
  92         if (field->flags & HID_MAIN_ITEM_CONSTANT)
  93                 goto ignore;
  94
  95         switch (usage->hid & HID_USAGE_PAGE) {
  96
  97                 case HID_UP_UNDEFINED:
  98                         goto ignore;
  99
 100                 case HID_UP_KEYBOARD:
 101
 102                         set_bit(EV_REP, input->evbit);
 103
 104                         if ((usage->hid & HID_USAGE) < 256) {
 105                                 if (!hid_keyboard[usage->hid & HID_USAGE]) goto ignore;
 106                                 map_key_clear(hid_keyboard[usage->hid & HID_USAGE]);
 107                         } else
 108                                 map_key(KEY_UNKNOWN);
 109
 110                         break;
 111
 112                 case HID_UP_BUTTON:
 113
 114                         code = ((usage->hid - 1) & 0xf);
 115
 116                         switch (field->application) {
 117                                 case HID_GD_MOUSE:
 118                                 case HID_GD_POINTER:  code += 0x110; break;
 119                                 case HID_GD_JOYSTICK: code += 0x120; break;
 120                                 case HID_GD_GAMEPAD:  code += 0x130; break;
 121                                 default:
 122                                         switch (field->physical) {
 123                                                 case HID_GD_MOUSE:
 124                                                 case HID_GD_POINTER:  code += 0x110; break;
 125                                                 case HID_GD_JOYSTICK: code += 0x120; break;
 126                                                 case HID_GD_GAMEPAD:  code += 0x130; break;
 127                                                 default:              code += 0x100;
 128                                         }
 129                         }
 130
 131                         map_key(code);
 132                         break;
 133
 134                 case HID_UP_GENDESK:
 135
 136                         if ((usage->hid & 0xf0) == 0x80) {      /* SystemControl */
 137                                 switch (usage->hid & 0xf) {
 138                                         case 0x1: map_key_clear(KEY_POWER);  break;
 139                                         case 0x2: map_key_clear(KEY_SLEEP);  break;
 140                                         case 0x3: map_key_clear(KEY_WAKEUP); break;
 141                                         default: goto unknown;
 142                                 }
 143                                 break;
 144                         }
 145
 146                         if ((usage->hid & 0xf0) == 0x90) {      /* D-pad */
 147                                 switch (usage->hid) {
 148                                         case HID_GD_UP:    usage->hat_dir = 1; break;
 149                                         case HID_GD_DOWN:  usage->hat_dir = 5; break;
 150                                         case HID_GD_RIGHT: usage->hat_dir = 3; break;
 151                                         case HID_GD_LEFT:  usage->hat_dir = 7; break;
 152                                         default: goto unknown;
 153                                 }
 154                                 if (field->dpad) {
 155                                         map_abs(field->dpad);
 156                                         goto ignore;
 157                                 }
 158                                 map_abs(ABS_HAT0X);
 159                                 break;
 160                         }
 161
 162                         switch (usage->hid) {
 163
 164                                 /* These usage IDs map directly to the usage codes. */
 165                                 case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
 166                                 case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
 167                                 case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
 168                                         if (field->flags & HID_MAIN_ITEM_RELATIVE)
 169                                                 map_rel(usage->hid & 0xf);
 170                                         else
 171                                                 map_abs(usage->hid & 0xf);
 172                                         break;
 173
 174                                 case HID_GD_HATSWITCH:
 175                                         usage->hat_min = field->logical_minimum;
 176                                         usage->hat_max = field->logical_maximum;
 177                                         map_abs(ABS_HAT0X);
 178                                         break;
 179
 180                                 case HID_GD_START:      map_key_clear(BTN_START);       break;
 181                                 case HID_GD_SELECT:     map_key_clear(BTN_SELECT);      break;
 182
 183                                 default: goto unknown;
 184                         }
 185
 186                         break;
 187
 188                 case HID_UP_LED:
 189                         if (((usage->hid - 1) & 0xffff) >= LED_MAX)
 190                                 goto ignore;
 191                         map_led((usage->hid - 1) & 0xffff);
 192                         break;
 193
 194                 case HID_UP_DIGITIZER:
 195
 196                         switch (usage->hid & 0xff) {
 197
 198                                 case 0x30: /* TipPressure */
 199                                         if (!test_bit(BTN_TOUCH, input->keybit)) {
 200                                                 device->quirks |= HID_QUIRK_NOTOUCH;
 201                                                 set_bit(EV_KEY, input->evbit);
 202                                                 set_bit(BTN_TOUCH, input->keybit);
 203                                         }
 204
 205                                         map_abs_clear(ABS_PRESSURE);
 206                                         break;
 207
 208                                 case 0x32: /* InRange */
 209                                         switch (field->physical & 0xff) {
 210                                                 case 0x21: map_key(BTN_TOOL_MOUSE); break;
 211                                                 case 0x22: map_key(BTN_TOOL_FINGER); break;
 212                                                 default: map_key(BTN_TOOL_PEN); break;
 213                                         }
 214                                         break;
 215
 216                                 case 0x3c: /* Invert */
 217                                         map_key_clear(BTN_TOOL_RUBBER);
 218                                         break;
 219
 220                                 case 0x33: /* Touch */
 221                                 case 0x42: /* TipSwitch */
 222                                 case 0x43: /* TipSwitch2 */
 223                                         device->quirks &= ~HID_QUIRK_NOTOUCH;
 224                                         map_key_clear(BTN_TOUCH);
 225                                         break;
 226
 227                                 case 0x44: /* BarrelSwitch */
 228                                         map_key_clear(BTN_STYLUS);
 229                                         break;
 230
 231                                 default:  goto unknown;
 232                         }
 233                         break;
 234
 235                 case HID_UP_CONSUMER:   /* USB HUT v1.1, pages 56-62 */
 236
 237                         switch (usage->hid & HID_USAGE) {
 238                                 case 0x000: goto ignore;
 239                                 case 0x034: map_key_clear(KEY_SLEEP);           break;
 240                                 case 0x036: map_key_clear(BTN_MISC);            break;
 241                                 case 0x08a: map_key_clear(KEY_WWW);             break;
 242                                 case 0x095: map_key_clear(KEY_HELP);            break;
 243                                 case 0x0b0: map_key_clear(KEY_PLAY);            break;
 244                                 case 0x0b1: map_key_clear(KEY_PAUSE);           break;
 245                                 case 0x0b2: map_key_clear(KEY_RECORD);          break;
 246                                 case 0x0b3: map_key_clear(KEY_FASTFORWARD);     break;
 247                                 case 0x0b4: map_key_clear(KEY_REWIND);          break;
 248                                 case 0x0b5: map_key_clear(KEY_NEXTSONG);        break;
 249                                 case 0x0b6: map_key_clear(KEY_PREVIOUSSONG);    break;
 250                                 case 0x0b7: map_key_clear(KEY_STOPCD);          break;
 251                                 case 0x0b8: map_key_clear(KEY_EJECTCD);         break;
 252                                 case 0x0cd: map_key_clear(KEY_PLAYPAUSE);       break;
 253                                 case 0x0e0: map_abs_clear(ABS_VOLUME);          break;
 254                                 case 0x0e2: map_key_clear(KEY_MUTE);            break;
 255                                 case 0x0e5: map_key_clear(KEY_BASSBOOST);       break;
 256                                 case 0x0e9: map_key_clear(KEY_VOLUMEUP);        break;
 257                                 case 0x0ea: map_key_clear(KEY_VOLUMEDOWN);      break;
 258                                 case 0x183: map_key_clear(KEY_CONFIG);          break;
 259                                 case 0x18a: map_key_clear(KEY_MAIL);            break;
 260                                 case 0x192: map_key_clear(KEY_CALC);            break;
 261                                 case 0x194: map_key_clear(KEY_FILE);            break;
 262                                 case 0x21a: map_key_clear(KEY_UNDO);            break;
 263                                 case 0x21b: map_key_clear(KEY_COPY);            break;
 264                                 case 0x21c: map_key_clear(KEY_CUT);             break;
 265                                 case 0x21d: map_key_clear(KEY_PASTE);           break;
 266                                 case 0x221: map_key_clear(KEY_FIND);            break;
 267                                 case 0x223: map_key_clear(KEY_HOMEPAGE);        break;
 268                                 case 0x224: map_key_clear(KEY_BACK);            break;
 269                                 case 0x225: map_key_clear(KEY_FORWARD);         break;
 270                                 case 0x226: map_key_clear(KEY_STOP);            break;
 271                                 case 0x227: map_key_clear(KEY_REFRESH);         break;
 272                                 case 0x22a: map_key_clear(KEY_BOOKMARKS);       break;
 273                                 case 0x238: map_rel(REL_HWHEEL);                break;
 274                                 default:    goto unknown;
 275                         }
 276                         break;
 277
 278                 case HID_UP_HPVENDOR:   /* Reported on a Dutch layout HP5308 */
 279
 280                         set_bit(EV_REP, input->evbit);
 281                         switch (usage->hid & HID_USAGE) {
 282                                 case 0x021: map_key_clear(KEY_PRINT);           break;
 283                                 case 0x070: map_key_clear(KEY_HP);              break;
 284                                 case 0x071: map_key_clear(KEY_CAMERA);          break;
 285                                 case 0x072: map_key_clear(KEY_SOUND);           break;
 286                                 case 0x073: map_key_clear(KEY_QUESTION);        break;
 287                                 case 0x080: map_key_clear(KEY_EMAIL);           break;
 288                                 case 0x081: map_key_clear(KEY_CHAT);            break;
 289                                 case 0x082: map_key_clear(KEY_SEARCH);          break;
 290                                 case 0x083: map_key_clear(KEY_CONNECT);         break;
 291                                 case 0x084: map_key_clear(KEY_FINANCE);         break;
 292                                 case 0x085: map_key_clear(KEY_SPORT);           break;
 293                                 case 0x086: map_key_clear(KEY_SHOP);            break;
 294                                 default:    goto ignore;
 295                         }
 296                         break;
 297
 298                 case HID_UP_MSVENDOR:
 299
 300                         goto ignore;
 301
 302                 case HID_UP_PID:
 303
 304                         set_bit(EV_FF, input->evbit);
 305                         switch(usage->hid & HID_USAGE) {
 306                                 case 0x26: map_ff_effect(FF_CONSTANT);  goto ignore;
 307                                 case 0x27: map_ff_effect(FF_RAMP);      goto ignore;
 308                                 case 0x28: map_ff_effect(FF_CUSTOM);    goto ignore;
 309                                 case 0x30: map_ff_effect(FF_SQUARE);    map_ff_effect(FF_PERIODIC); goto ignore;
 310                                 case 0x31: map_ff_effect(FF_SINE);      map_ff_effect(FF_PERIODIC); goto ignore;
 311                                 case 0x32: map_ff_effect(FF_TRIANGLE);  map_ff_effect(FF_PERIODIC); goto ignore;
 312                                 case 0x33: map_ff_effect(FF_SAW_UP);    map_ff_effect(FF_PERIODIC); goto ignore;
 313                                 case 0x34: map_ff_effect(FF_SAW_DOWN);  map_ff_effect(FF_PERIODIC); goto ignore;
 314                                 case 0x40: map_ff_effect(FF_SPRING);    goto ignore;
 315                                 case 0x41: map_ff_effect(FF_DAMPER);    goto ignore;
 316                                 case 0x42: map_ff_effect(FF_INERTIA);   goto ignore;
 317                                 case 0x43: map_ff_effect(FF_FRICTION);  goto ignore;
 318                                 case 0x7e: map_ff(FF_GAIN);             break;
 319                                 case 0x83: input->ff_effects_max = field->value[0]; goto ignore;
 320                                 case 0x98: map_ff(FF_AUTOCENTER);       break;
 321                                 case 0xa4: map_key_clear(BTN_DEAD);     break;
 322                                 default: goto ignore;
 323                         }
 324                         break;
 325
 326                 default:
 327                 unknown:
 328                         if (field->report_size == 1) {
 329                                 if (field->report->type == HID_OUTPUT_REPORT) {
 330                                         map_led(LED_MISC);
 331                                         break;
 332                                 }
 333                                 map_key(BTN_MISC);
 334                                 break;
 335                         }
 336                         if (field->flags & HID_MAIN_ITEM_RELATIVE) {
 337                                 map_rel(REL_MISC);
 338                                 break;
 339                         }
 340                         map_abs(ABS_MISC);
 341                         break;
 342         }
 343
 344         set_bit(usage->type, input->evbit);
 345
 346         while (usage->code <= max && test_and_set_bit(usage->code, bit))
 347                 usage->code = find_next_zero_bit(bit, max + 1, usage->code);
 348
 349         if (usage->code > max)
 350                 goto ignore;
 351
 352         if ((device->quirks & (HID_QUIRK_2WHEEL_MOUSE_HACK_7 | HID_QUIRK_2WHEEL_MOUSE_HACK_5)) &&
 353                  (usage->type == EV_REL) && (usage->code == REL_WHEEL))
 354                         set_bit(REL_HWHEEL, bit);
 355
 356         if (((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 0x00090005))
 357                 || ((device->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007)))
 358                 goto ignore;
 359
 360         if (usage->type == EV_ABS) {
 361
 362                 int a = field->logical_minimum;
 363                 int b = field->logical_maximum;
 364
 365                 if ((device->quirks & HID_QUIRK_BADPAD) && (usage->code == ABS_X || usage->code == ABS_Y)) {
 366                         a = field->logical_minimum = 0;
 367                         b = field->logical_maximum = 255;
 368                 }
 369
 370                 if (field->application == HID_GD_GAMEPAD || field->application == HID_GD_JOYSTICK)
 371                         input_set_abs_params(input, usage->code, a, b, (b - a) >> 8, (b - a) >> 4);
 372                 else    input_set_abs_params(input, usage->code, a, b, 0, 0);
 373
 374         }
 375
 376         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 377                 int i;
 378                 for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
 379                         input_set_abs_params(input, i, -1, 1, 0, 0);
 380                         set_bit(i, input->absbit);
 381                 }
 382                 if (usage->hat_dir && !field->dpad)
 383                         field->dpad = usage->code;
 384         }
 385
 386 #ifdef DEBUG
 387         resolv_event(usage->type, usage->code);
 388         printk("\n");
 389 #endif
 390         return;
 391
 392 ignore:
 393 #ifdef DEBUG
 394         printk("IGNORED\n");
 395 #endif
 396         return;
 397 }
 398
 399 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value, struct pt_regs *regs)
 400 {
 401         struct input_dev *input = &field->hidinput->input;
 402         int *quirks = &hid->quirks;
 403
 404         if (!input)
 405                 return;
 406
 407         input_regs(input, regs);
 408
 409         if (!usage->type)
 410                 return;
 411
 412         if (((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 0x00090005))
 413                 || ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && (usage->hid == 0x00090007))) {
 414                 if (value) hid->quirks |=  HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
 415                 else       hid->quirks &= ~HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
 416                 return;
 417         }
 418
 419         if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_ON) && (usage->code == REL_WHEEL)) {
 420                 input_event(input, usage->type, REL_HWHEEL, value);
 421                 return;
 422         }
 423
 424         if (usage->hat_min < usage->hat_max || usage->hat_dir) {
 425                 int hat_dir = usage->hat_dir;
 426                 if (!hat_dir)
 427                         hat_dir = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
 428                 if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
 429                 input_event(input, usage->type, usage->code    , hid_hat_to_axis[hat_dir].x);
 430                 input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[hat_dir].y);
 431                 return;
 432         }
 433
 434         if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
 435                 *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
 436                 return;
 437         }
 438
 439         if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
 440                 if (value) {
 441                         input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
 442                         return;
 443                 }
 444                 input_event(input, usage->type, usage->code, 0);
 445                 input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
 446                 return;
 447         }
 448
 449         if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
 450                 int a = field->logical_minimum;
 451                 int b = field->logical_maximum;
 452                 input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
 453         }
 454
 455         if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
 456                 input->ff_effects_max = value;
 457                 dbg("Maximum Effects - %d",input->ff_effects_max);
 458                 return;
 459         }
 460
 461         if (usage->hid == (HID_UP_PID | 0x7fUL)) {
 462                 dbg("PID Pool Report\n");
 463                 return;
 464         }
 465
 466         if((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
 467                 return;
 468
 469         input_event(input, usage->type, usage->code, value);
 470
 471         if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
 472                 input_event(input, usage->type, usage->code, 0);
 473 }
 474
 475 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
 476 {
 477         struct list_head *lh;
 478         struct hid_input *hidinput;
 479
 480         list_for_each (lh, &hid->inputs) {
 481                 hidinput = list_entry(lh, struct hid_input, list);
 482                 input_sync(&hidinput->input);
 483         }
 484 }
 485
 486 static int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field)
 487 {
 488         struct hid_report *report;
 489         int i, j;
 490
 491         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
 492                 for (i = 0; i < report->maxfield; i++) {
 493                         *field = report->field[i];
 494                         for (j = 0; j < (*field)->maxusage; j++)
 495                                 if ((*field)->usage[j].type == type && (*field)->usage[j].code == code)
 496                                         return j;
 497                 }
 498         }
 499         return -1;
 500 }
 501
 502 static int hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
 503 {
 504         struct hid_device *hid = dev->private;
 505         struct hid_field *field;
 506         int offset;
 507
 508         if (type == EV_FF)
 509                 return hid_ff_event(hid, dev, type, code, value);
 510
 511         if (type != EV_LED)
 512                 return -1;
 513
 514         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
 515                 warn("event field not found");
 516                 return -1;
 517         }
 518
 519         hid_set_field(field, offset, value);
 520         hid_submit_report(hid, field->report, USB_DIR_OUT);
 521
 522         return 0;
 523 }
 524
 525 static int hidinput_open(struct input_dev *dev)
 526 {
 527         struct hid_device *hid = dev->private;
 528         return hid_open(hid);
 529 }
 530
 531 static void hidinput_close(struct input_dev *dev)
 532 {
 533         struct hid_device *hid = dev->private;
 534         hid_close(hid);
 535 }
 536
 537 /*
 538  * Register the input device; print a message.
 539  * Configure the input layer interface
 540  * Read all reports and initialize the absolute field values.
 541  */
 542
 543 int hidinput_connect(struct hid_device *hid)
 544 {
 545         struct usb_device *dev = hid->dev;
 546         struct hid_report *report;
 547         struct hid_input *hidinput = NULL;
 548         int i, j, k;
 549
 550         INIT_LIST_HEAD(&hid->inputs);
 551
 552         for (i = 0; i < hid->maxcollection; i++)
 553                 if (hid->collection[i].type == HID_COLLECTION_APPLICATION ||
 554                     hid->collection[i].type == HID_COLLECTION_PHYSICAL)
 555                         if (IS_INPUT_APPLICATION(hid->collection[i].usage))
 556                                 break;
 557
 558         if (i == hid->maxcollection)
 559                 return -1;
 560
 561         for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++)
 562                 list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
 563
 564                         if (!report->maxfield)
 565                                 continue;
 566
 567                         if (!hidinput) {
 568                                 hidinput = kmalloc(sizeof(*hidinput), GFP_KERNEL);
 569                                 if (!hidinput) {
 570                                         err("Out of memory during hid input probe");
 571                                         return -1;
 572                                 }
 573                                 memset(hidinput, 0, sizeof(*hidinput));
 574
 575                                 list_add_tail(&hidinput->list, &hid->inputs);
 576
 577                                 hidinput->input.private = hid;
 578                                 hidinput->input.event = hidinput_input_event;
 579                                 hidinput->input.open = hidinput_open;
 580                                 hidinput->input.close = hidinput_close;
 581
 582                                 hidinput->input.name = hid->name;
 583                                 hidinput->input.phys = hid->phys;
 584                                 hidinput->input.uniq = hid->uniq;
 585                                 usb_to_input_id(dev, &hidinput->input.id);
 586                                 hidinput->input.dev = &hid->intf->dev;
 587                         }
 588
 589                         for (i = 0; i < report->maxfield; i++)
 590                                 for (j = 0; j < report->field[i]->maxusage; j++)
 591                                         hidinput_configure_usage(hidinput, report->field[i],
 592                                                                  report->field[i]->usage + j);
 593
 594                         if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
 595                                 /* This will leave hidinput NULL, so that it
 596                                  * allocates another one if we have more inputs on
 597                                  * the same interface. Some devices (e.g. Happ's
 598                                  * UGCI) cram a lot of unrelated inputs into the
 599                                  * same interface. */
 600                                 hidinput->report = report;
 601                                 input_register_device(&hidinput->input);
 602                                 hidinput = NULL;
 603                         }
 604                 }
 605
 606         /* This only gets called when we are a single-input (most of the
 607          * time). IOW, not a HID_QUIRK_MULTI_INPUT. The hid_ff_init() is
 608          * only useful in this case, and not for multi-input quirks. */
 609         if (hidinput) {
 610                 hid_ff_init(hid);
 611                 input_register_device(&hidinput->input);
 612         }
 613
 614         return 0;
 615 }
 616
 617 void hidinput_disconnect(struct hid_device *hid)
 618 {
 619         struct list_head *lh, *next;
 620         struct hid_input *hidinput;
 621
 622         list_for_each_safe(lh, next, &hid->inputs) {
 623                 hidinput = list_entry(lh, struct hid_input, list);
 624                 input_unregister_device(&hidinput->input);
 625                 list_del(&hidinput->list);
 626                 kfree(hidinput);
 627         }
 628 }