frontend/linux/in_evdev.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2008-2010
   3  *
   4  * This work is licensed under the terms of any of these licenses
   5  * (at your option):
   6  *  - GNU GPL, version 2 or later.
   7  *  - GNU LGPL, version 2.1 or later.
   8  * See the COPYING file in the top-level directory.
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <fcntl.h>
  17 #include <sys/ioctl.h>
  18 #include <unistd.h>
  19 #include <linux/input.h>
  20 #include <errno.h>
  21
  22 #include "../common/input.h"
  23 #include "in_evdev.h"
  24
  25 typedef struct {
  26         int fd;
  27         int *kbits;
  28         int abs_min_x;
  29         int abs_max_x;
  30         int abs_min_y;
  31         int abs_max_y;
  32         int abs_lzone;
  33         int abs_lastx;
  34         int abs_lasty;
  35         int kc_first;
  36         int kc_last;
  37 } in_evdev_t;
  38
  39 #ifndef KEY_CNT
  40 #define KEY_CNT (KEY_MAX + 1)
  41 #endif
  42
  43 #define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
  44         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  45
  46 #define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] |= \
  47         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  48
  49 #define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
  50         ~(1 << ((x) & (sizeof(keybits[0])*8-1))))
  51
  52 int in_evdev_allow_abs_only;
  53
  54 static const char * const in_evdev_prefix = "evdev:";
  55 static const char * const in_evdev_keys[KEY_CNT] = {
  56         [0 ... KEY_MAX] = NULL,
  57         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
  58         [KEY_1] = "1",                          [KEY_2] = "2",
  59         [KEY_3] = "3",                          [KEY_4] = "4",
  60         [KEY_5] = "5",                          [KEY_6] = "6",
  61         [KEY_7] = "7",                          [KEY_8] = "8",
  62         [KEY_9] = "9",                          [KEY_0] = "0",
  63         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
  64         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
  65         [KEY_Q] = "Q",                          [KEY_W] = "W",
  66         [KEY_E] = "E",                          [KEY_R] = "R",
  67         [KEY_T] = "T",                          [KEY_Y] = "Y",
  68         [KEY_U] = "U",                          [KEY_I] = "I",
  69         [KEY_O] = "O",                          [KEY_P] = "P",
  70         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
  71         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
  72         [KEY_A] = "A",                          [KEY_S] = "S",
  73         [KEY_D] = "D",                          [KEY_F] = "F",
  74         [KEY_G] = "G",                          [KEY_H] = "H",
  75         [KEY_J] = "J",                          [KEY_K] = "K",
  76         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
  77         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
  78         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
  79         [KEY_Z] = "Z",                          [KEY_X] = "X",
  80         [KEY_C] = "C",                          [KEY_V] = "V",
  81         [KEY_B] = "B",                          [KEY_N] = "N",
  82         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
  83         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
  84         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
  85         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
  86         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
  87         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
  88         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
  89         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
  90         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
  91         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
  92         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
  93         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
  94         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
  95         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
  96         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
  97         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
  98         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
  99         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
 100         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
 101         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
 102         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
 103         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
 104         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
 105         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
 106         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
 107         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
 108         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
 109         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
 110         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
 111         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
 112         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
 113         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
 114         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
 115         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
 116         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
 117         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
 118         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
 119         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
 120         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
 121         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
 122         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
 123         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
 124         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
 125         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
 126         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
 127         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
 128         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
 129         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
 130         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
 131         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
 132         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
 133         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
 134         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
 135         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
 136         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
 137         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
 138         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
 139 };
 140
 141
 142 static void in_evdev_probe(void)
 143 {
 144         long keybits[KEY_CNT / sizeof(long) / 8];
 145         long absbits[(ABS_MAX+1) / sizeof(long) / 8];
 146         int i;
 147
 148         // the kernel might support and return less keys then we know about,
 149         // so make sure the buffers are clear.
 150         memset(keybits, 0, sizeof(keybits));
 151         memset(absbits, 0, sizeof(absbits));
 152
 153         for (i = 0;; i++)
 154         {
 155                 int support = 0, count = 0;
 156                 int u, ret, fd, kc_first = KEY_MAX, kc_last = 0;
 157                 in_evdev_t *dev;
 158                 char name[64];
 159
 160                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
 161                 fd = open(name, O_RDONLY|O_NONBLOCK);
 162                 if (fd == -1) {
 163                         if (errno == EACCES)
 164                                 continue;       /* maybe we can access next one */
 165                         break;
 166                 }
 167
 168                 /* check supported events */
 169                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
 170                 if (ret == -1) {
 171                         printf("in_evdev: ioctl failed on %s\n", name);
 172                         goto skip;
 173                 }
 174
 175                 if (support & (1 << EV_KEY)) {
 176                         ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 177                         if (ret == -1) {
 178                                 printf("in_evdev: ioctl failed on %s\n", name);
 179                                 goto skip;
 180                         }
 181
 182                         /* check for interesting keys */
 183                         for (u = 0; u < KEY_CNT; u++) {
 184                                 if (KEYBITS_BIT(u)) {
 185                                         if (u < kc_first)
 186                                                 kc_first = u;
 187                                         if (u > kc_last)
 188                                                 kc_last = u;
 189                                         if (u != KEY_POWER && u != KEY_SLEEP && u != BTN_TOUCH)
 190                                                 count++;
 191                                         if (u == BTN_TOUCH) /* we can't deal with ts currently */
 192                                                 goto skip;
 193                                 }
 194                         }
 195                 }
 196
 197                 if (count == 0 && !in_evdev_allow_abs_only)
 198                         goto skip;
 199
 200                 dev = calloc(1, sizeof(*dev));
 201                 if (dev == NULL)
 202                         goto skip;
 203
 204                 ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
 205                 if (ret == -1) {
 206                         printf("Warning: EVIOCGKEY not supported, will have to track state\n");
 207                         dev->kbits = calloc(KEY_CNT, sizeof(int));
 208                         if (dev->kbits == NULL) {
 209                                 free(dev);
 210                                 goto skip;
 211                         }
 212                 }
 213
 214                 /* check for abs too */
 215                 if (support & (1 << EV_ABS)) {
 216                         struct input_absinfo ainfo;
 217                         int dist;
 218                         ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
 219                         if (ret == -1)
 220                                 goto no_abs;
 221                         if (absbits[0] & (1 << ABS_X)) {
 222                                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 223                                 if (ret == -1)
 224                                         goto no_abs;
 225                                 dist = ainfo.maximum - ainfo.minimum;
 226                                 dev->abs_lzone = dist / 4;
 227                                 dev->abs_min_x = ainfo.minimum;
 228                                 dev->abs_max_x = ainfo.maximum;
 229                         }
 230                         if (absbits[0] & (1 << ABS_Y)) {
 231                                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 232                                 if (ret == -1)
 233                                         goto no_abs;
 234                                 dist = ainfo.maximum - ainfo.minimum;
 235                                 dev->abs_min_y = ainfo.minimum;
 236                                 dev->abs_max_y = ainfo.maximum;
 237                         }
 238                 }
 239
 240 no_abs:
 241                 if (count == 0 && dev->abs_lzone == 0) {
 242                         free(dev);
 243                         goto skip;
 244                 }
 245
 246                 dev->fd = fd;
 247                 dev->kc_first = kc_first;
 248                 dev->kc_last = kc_last;
 249                 strcpy(name, in_evdev_prefix);
 250                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
 251                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
 252                         name+6, count, support);
 253                 in_register(name, IN_DRVID_EVDEV, fd, dev, KEY_CNT, in_evdev_keys, 0);
 254                 continue;
 255
 256 skip:
 257                 close(fd);
 258         }
 259 }
 260
 261 static void in_evdev_free(void *drv_data)
 262 {
 263         in_evdev_t *dev = drv_data;
 264         if (dev == NULL)
 265                 return;
 266         close(dev->fd);
 267         free(dev);
 268 }
 269
 270 static const char * const *
 271 in_evdev_get_key_names(int *count)
 272 {
 273         *count = KEY_CNT;
 274         return in_evdev_keys;
 275 }
 276
 277 static void or_binds(const int *binds, int key, int *result)
 278 {
 279         int t;
 280         for (t = 0; t < IN_BINDTYPE_COUNT; t++)
 281                 result[t] |= binds[IN_BIND_OFFS(key, t)];
 282 }
 283
 284 /* ORs result with binds of pressed buttons
 285  * XXX: should measure performance hit of this func, might need to optimize */
 286 int in_evdev_update(void *drv_data, const int *binds, int *result)
 287 {
 288         struct input_event ev[16];
 289         struct input_absinfo ainfo;
 290         int keybits_[KEY_CNT / sizeof(int)];
 291         int *keybits = keybits_;
 292         in_evdev_t *dev = drv_data;
 293         int rd, ret, u, lzone;
 294
 295         if (dev->kbits == NULL) {
 296                 ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
 297                 if (ret == -1) {
 298                         perror("in_evdev: ioctl failed");
 299                         return -1;
 300                 }
 301         }
 302         else {
 303                 keybits = dev->kbits;
 304                 while (1) {
 305                         rd = read(dev->fd, ev, sizeof(ev));
 306                         if (rd < (int)sizeof(ev[0])) {
 307                                 if (errno != EAGAIN)
 308                                         perror("in_evdev: read failed");
 309                                 break;
 310                         }
 311                         for (u = 0; u < rd / sizeof(ev[0]); u++) {
 312                                 if (ev[u].type != EV_KEY)
 313                                         continue;
 314                                 else if (ev[u].value == 1)
 315                                         KEYBITS_BIT_SET(ev[u].code);
 316                                 else if (ev[u].value == 0)
 317                                         KEYBITS_BIT_CLEAR(ev[u].code);
 318                         }
 319                 }
 320         }
 321
 322         for (u = dev->kc_first; u <= dev->kc_last; u++) {
 323                 if (KEYBITS_BIT(u))
 324                         or_binds(binds, u, result);
 325         }
 326
 327         /* map X and Y absolute to UDLR */
 328         lzone = dev->abs_lzone;
 329         if (lzone != 0) {
 330                 ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
 331                 if (ret != -1) {
 332                         if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
 333                         if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
 334                 }
 335         }
 336         if (lzone != 0) {
 337                 ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
 338                 if (ret != -1) {
 339                         if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
 340                         if (ainfo.value > dev->abs_max_y - lzone) or_binds(binds, KEY_DOWN, result);
 341                 }
 342         }
 343
 344         return 0;
 345 }
 346
 347 static int in_evdev_set_blocking(in_evdev_t *dev, int y)
 348 {
 349         long flags;
 350         int ret;
 351
 352         flags = (long)fcntl(dev->fd, F_GETFL);
 353         if ((int)flags == -1) {
 354                 perror("in_evdev: F_GETFL fcntl failed");
 355                 return -1;
 356         }
 357
 358         if (flags & O_NONBLOCK) {
 359                 /* flush the event queue */
 360                 struct input_event ev;
 361                 do {
 362                         ret = read(dev->fd, &ev, sizeof(ev));
 363                 }
 364                 while (ret == sizeof(ev));
 365         }
 366
 367         if (y)
 368                 flags &= ~O_NONBLOCK;
 369         else
 370                 flags |=  O_NONBLOCK;
 371         ret = fcntl(dev->fd, F_SETFL, flags);
 372         if (ret == -1) {
 373                 perror("in_evdev: F_SETFL fcntl failed");
 374                 return -1;
 375         }
 376
 377         return 0;
 378 }
 379
 380 static int in_evdev_set_config(void *drv_data, int what, int val)
 381 {
 382         in_evdev_t *dev = drv_data;
 383         int tmp;
 384
 385         switch (what) {
 386         case IN_CFG_BLOCKING:
 387                 return in_evdev_set_blocking(dev, val);
 388         case IN_CFG_ABS_DEAD_ZONE:
 389                 if (val < 1 || val > 99 || dev->abs_lzone == 0)
 390                         return -1;
 391                 /* XXX: based on X axis only, for now.. */
 392                 tmp = (dev->abs_max_x - dev->abs_min_x) / 2;
 393                 dev->abs_lzone = tmp - tmp * val / 100;
 394                 if (dev->abs_lzone < 1)
 395                         dev->abs_lzone = 1;
 396                 else if (dev->abs_lzone >= tmp)
 397                         dev->abs_lzone = tmp - 1;
 398                 break;
 399         default:
 400                 return -1;
 401         }
 402
 403         return 0;
 404 }
 405
 406 static int in_evdev_update_keycode(void *data, int *is_down)
 407 {
 408         int ret_kc = -1, ret_down = 0;
 409         in_evdev_t *dev = data;
 410         struct input_event ev;
 411         int rd;
 412
 413         /* do single event, the caller sometimes wants
 414          * to do select() in blocking mode */
 415         rd = read(dev->fd, &ev, sizeof(ev));
 416         if (rd < (int) sizeof(ev)) {
 417                 if (errno != EAGAIN) {
 418                         perror("in_evdev: error reading");
 419                         //sleep(1);
 420                         ret_kc = -2;
 421                 }
 422                 goto out;
 423         }
 424
 425         if (ev.type == EV_KEY) {
 426                 if (ev.value < 0 || ev.value > 1)
 427                         goto out;
 428                 ret_kc = ev.code;
 429                 ret_down = ev.value;
 430                 goto out;
 431         }
 432         else if (ev.type == EV_ABS)
 433         {
 434                 int lzone = dev->abs_lzone, down = 0, *last;
 435
 436                 // map absolute to up/down/left/right
 437                 if (lzone != 0 && ev.code == ABS_X) {
 438                         if (ev.value < dev->abs_min_x + lzone)
 439                                 down = KEY_LEFT;
 440                         else if (ev.value > dev->abs_max_x - lzone)
 441                                 down = KEY_RIGHT;
 442                         last = &dev->abs_lastx;
 443                 }
 444                 else if (lzone != 0 && ev.code == ABS_Y) {
 445                         if (ev.value < dev->abs_min_y + lzone)
 446                                 down = KEY_UP;
 447                         else if (ev.value > dev->abs_max_y - lzone)
 448                                 down = KEY_DOWN;
 449                         last = &dev->abs_lasty;
 450                 }
 451                 else
 452                         goto out;
 453
 454                 if (down == *last)
 455                         goto out;
 456
 457                 if (down == 0 || *last != 0) {
 458                         /* key up or direction change, return up event for old key */
 459                         ret_kc = *last;
 460                         ret_down = 0;
 461                         *last = 0;
 462                         goto out;
 463                 }
 464                 ret_kc = *last = down;
 465                 ret_down = 1;
 466                 goto out;
 467         }
 468
 469 out:
 470         if (is_down != NULL)
 471                 *is_down = ret_down;
 472
 473         return ret_kc;
 474 }
 475
 476 static const struct {
 477         short key;
 478         short pbtn;
 479 } key_pbtn_map[] =
 480 {
 481         { KEY_UP,       PBTN_UP },
 482         { KEY_DOWN,     PBTN_DOWN },
 483         { KEY_LEFT,     PBTN_LEFT },
 484         { KEY_RIGHT,    PBTN_RIGHT },
 485         /* XXX: maybe better set this from it's plat code somehow */
 486         /* Pandora */
 487         { KEY_END,      PBTN_MOK },
 488         { KEY_PAGEDOWN, PBTN_MBACK },
 489         { KEY_HOME,     PBTN_MA2 },
 490         { KEY_PAGEUP,   PBTN_MA3 },
 491         { KEY_LEFTCTRL,   PBTN_MENU },
 492         { KEY_RIGHTSHIFT, PBTN_L },
 493         { KEY_RIGHTCTRL,  PBTN_R },
 494         /* Caanoo */
 495         { BTN_THUMB2,   PBTN_MOK },
 496         { BTN_THUMB,    PBTN_MBACK },
 497         { BTN_TRIGGER,  PBTN_MA2 },
 498         { BTN_TOP,      PBTN_MA3 },
 499         { BTN_BASE,     PBTN_MENU },
 500         { BTN_TOP2,     PBTN_L },
 501         { BTN_PINKIE,   PBTN_R },
 502         /* "normal" keyboards */
 503         { KEY_ENTER,    PBTN_MOK },
 504         { KEY_ESC,      PBTN_MBACK },
 505         { KEY_A,        PBTN_MA2 },
 506         { KEY_S,        PBTN_MA3 },
 507         { KEY_BACKSLASH,  PBTN_MENU },
 508         { KEY_LEFTBRACE,  PBTN_L },
 509         { KEY_RIGHTBRACE, PBTN_R },
 510 };
 511
 512 #define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
 513
 514 static int in_evdev_menu_translate(void *drv_data, int keycode)
 515 {
 516         in_evdev_t *dev = drv_data;
 517         int i;
 518
 519         if (keycode < 0)
 520         {
 521                 /* menu -> kc */
 522                 keycode = -keycode;
 523                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 524                         if (key_pbtn_map[i].pbtn == keycode) {
 525                                 int k = key_pbtn_map[i].key;
 526                                 /* should really check EVIOCGBIT, but this is enough for now */
 527                                 if (dev->kc_first <= k && k <= dev->kc_last)
 528                                         return k;
 529                         }
 530         }
 531         else
 532         {
 533                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 534                         if (key_pbtn_map[i].key == keycode)
 535                                 return key_pbtn_map[i].pbtn;
 536         }
 537
 538         return 0;
 539 }
 540
 541 static void in_evdev_get_def_binds(int *binds)
 542 {
 543         int i;
 544
 545         for (i = 0; ; i++) {
 546                 if (in_evdev_defbinds[i].bit == 0 && in_evdev_defbinds[i].code == 0)
 547                         break;
 548                 binds[IN_BIND_OFFS(in_evdev_defbinds[i].code, in_evdev_defbinds[i].btype)] =
 549                         1 << in_evdev_defbinds[i].bit;
 550         }
 551 }
 552
 553 /* remove binds of missing keys, count remaining ones */
 554 static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
 555 {
 556         int keybits[KEY_CNT / sizeof(int)];
 557         in_evdev_t *dev = drv_data;
 558         int i, t, ret, offs, count = 0;
 559
 560         memset(keybits, 0, sizeof(keybits));
 561         ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 562         if (ret == -1) {
 563                 perror("in_evdev: ioctl failed");
 564                 // memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
 565         }
 566
 567         if (dev->abs_lzone != 0) {
 568                 KEYBITS_BIT_SET(KEY_LEFT);
 569                 KEYBITS_BIT_SET(KEY_RIGHT);
 570         }
 571         if (dev->abs_lzone != 0) {
 572                 KEYBITS_BIT_SET(KEY_UP);
 573                 KEYBITS_BIT_SET(KEY_DOWN);
 574         }
 575
 576         for (i = 0; i < KEY_CNT; i++) {
 577                 for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
 578                         offs = IN_BIND_OFFS(i, t);
 579                         if (!KEYBITS_BIT(i))
 580                                 binds[offs] = def_binds[offs] = 0;
 581                         if (binds[offs])
 582                                 count++;
 583                 }
 584         }
 585
 586         return count;
 587 }
 588
 589 void in_evdev_init(void *vdrv)
 590 {
 591         in_drv_t *drv = vdrv;
 592
 593         drv->prefix = in_evdev_prefix;
 594         drv->probe = in_evdev_probe;
 595         drv->free = in_evdev_free;
 596         drv->get_key_names = in_evdev_get_key_names;
 597         drv->get_def_binds = in_evdev_get_def_binds;
 598         drv->clean_binds = in_evdev_clean_binds;
 599         drv->set_config = in_evdev_set_config;
 600         drv->update_keycode = in_evdev_update_keycode;
 601         drv->menu_translate = in_evdev_menu_translate;
 602 }
 603