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 #define IN_EVDEV_PREFIX "evdev:"
  55
  56 static const char * const in_evdev_keys[KEY_CNT] = {
  57         [0 ... KEY_MAX] = NULL,
  58         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
  59         [KEY_1] = "1",                          [KEY_2] = "2",
  60         [KEY_3] = "3",                          [KEY_4] = "4",
  61         [KEY_5] = "5",                          [KEY_6] = "6",
  62         [KEY_7] = "7",                          [KEY_8] = "8",
  63         [KEY_9] = "9",                          [KEY_0] = "0",
  64         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
  65         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
  66         [KEY_Q] = "Q",                          [KEY_W] = "W",
  67         [KEY_E] = "E",                          [KEY_R] = "R",
  68         [KEY_T] = "T",                          [KEY_Y] = "Y",
  69         [KEY_U] = "U",                          [KEY_I] = "I",
  70         [KEY_O] = "O",                          [KEY_P] = "P",
  71         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
  72         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
  73         [KEY_A] = "A",                          [KEY_S] = "S",
  74         [KEY_D] = "D",                          [KEY_F] = "F",
  75         [KEY_G] = "G",                          [KEY_H] = "H",
  76         [KEY_J] = "J",                          [KEY_K] = "K",
  77         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
  78         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
  79         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
  80         [KEY_Z] = "Z",                          [KEY_X] = "X",
  81         [KEY_C] = "C",                          [KEY_V] = "V",
  82         [KEY_B] = "B",                          [KEY_N] = "N",
  83         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
  84         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
  85         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
  86         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
  87         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
  88         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
  89         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
  90         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
  91         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
  92         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
  93         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
  94         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
  95         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
  96         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
  97         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
  98         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
  99         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
 100         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
 101         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
 102         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
 103         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
 104         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
 105         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
 106         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
 107         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
 108         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
 109         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
 110         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
 111         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
 112         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
 113         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
 114         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
 115         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
 116         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
 117         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
 118         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
 119         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
 120         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
 121         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
 122         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
 123         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
 124         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
 125         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
 126         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
 127         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
 128         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
 129         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
 130         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
 131         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
 132         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
 133         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
 134         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
 135         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
 136         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
 137         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
 138         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
 139         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
 140 };
 141
 142
 143 static void in_evdev_probe(void)
 144 {
 145         long keybits[KEY_CNT / sizeof(long) / 8];
 146         long absbits[(ABS_MAX+1) / sizeof(long) / 8];
 147         int i;
 148
 149         // the kernel might support and return less keys then we know about,
 150         // so make sure the buffers are clear.
 151         memset(keybits, 0, sizeof(keybits));
 152         memset(absbits, 0, sizeof(absbits));
 153
 154         for (i = 0;; i++)
 155         {
 156                 int support = 0, count = 0;
 157                 int u, ret, fd, kc_first = KEY_MAX, kc_last = 0;
 158                 in_evdev_t *dev;
 159                 char name[64];
 160
 161                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
 162                 fd = open(name, O_RDONLY|O_NONBLOCK);
 163                 if (fd == -1) {
 164                         if (errno == EACCES)
 165                                 continue;       /* maybe we can access next one */
 166                         break;
 167                 }
 168
 169                 /* check supported events */
 170                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
 171                 if (ret == -1) {
 172                         printf("in_evdev: ioctl failed on %s\n", name);
 173                         goto skip;
 174                 }
 175
 176                 if (support & (1 << EV_KEY)) {
 177                         ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 178                         if (ret == -1) {
 179                                 printf("in_evdev: ioctl failed on %s\n", name);
 180                                 goto skip;
 181                         }
 182
 183                         /* check for interesting keys */
 184                         for (u = 0; u < KEY_CNT; u++) {
 185                                 if (KEYBITS_BIT(u)) {
 186                                         if (u < kc_first)
 187                                                 kc_first = u;
 188                                         if (u > kc_last)
 189                                                 kc_last = u;
 190                                         if (u != KEY_POWER && u != KEY_SLEEP && u != BTN_TOUCH)
 191                                                 count++;
 192                                         if (u == BTN_TOUCH) /* we can't deal with ts currently */
 193                                                 goto skip;
 194                                 }
 195                         }
 196                 }
 197
 198                 if (count == 0 && !in_evdev_allow_abs_only)
 199                         goto skip;
 200
 201                 dev = calloc(1, sizeof(*dev));
 202                 if (dev == NULL)
 203                         goto skip;
 204
 205                 ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
 206                 if (ret == -1) {
 207                         printf("Warning: EVIOCGKEY not supported, will have to track state\n");
 208                         dev->kbits = calloc(KEY_CNT, sizeof(int));
 209                         if (dev->kbits == NULL) {
 210                                 free(dev);
 211                                 goto skip;
 212                         }
 213                 }
 214
 215                 /* check for abs too */
 216                 if (support & (1 << EV_ABS)) {
 217                         struct input_absinfo ainfo;
 218                         int dist;
 219                         ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
 220                         if (ret == -1)
 221                                 goto no_abs;
 222                         if (absbits[0] & (1 << ABS_X)) {
 223                                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 224                                 if (ret == -1)
 225                                         goto no_abs;
 226                                 dist = ainfo.maximum - ainfo.minimum;
 227                                 dev->abs_lzone = dist / 4;
 228                                 dev->abs_min_x = ainfo.minimum;
 229                                 dev->abs_max_x = ainfo.maximum;
 230                         }
 231                         if (absbits[0] & (1 << ABS_Y)) {
 232                                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 233                                 if (ret == -1)
 234                                         goto no_abs;
 235                                 dist = ainfo.maximum - ainfo.minimum;
 236                                 dev->abs_min_y = ainfo.minimum;
 237                                 dev->abs_max_y = ainfo.maximum;
 238                         }
 239                 }
 240
 241 no_abs:
 242                 if (count == 0 && dev->abs_lzone == 0) {
 243                         free(dev);
 244                         goto skip;
 245                 }
 246
 247                 dev->fd = fd;
 248                 dev->kc_first = kc_first;
 249                 dev->kc_last = kc_last;
 250                 strcpy(name, IN_EVDEV_PREFIX);
 251                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
 252                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
 253                         name+6, count, support);
 254                 in_register(name, fd, dev, KEY_CNT, in_evdev_keys, 0);
 255                 continue;
 256
 257 skip:
 258                 close(fd);
 259         }
 260 }
 261
 262 static void in_evdev_free(void *drv_data)
 263 {
 264         in_evdev_t *dev = drv_data;
 265         if (dev == NULL)
 266                 return;
 267         close(dev->fd);
 268         free(dev);
 269 }
 270
 271 static const char * const *
 272 in_evdev_get_key_names(int *count)
 273 {
 274         *count = KEY_CNT;
 275         return in_evdev_keys;
 276 }
 277
 278 static void or_binds(const int *binds, int key, int *result)
 279 {
 280         int t;
 281         for (t = 0; t < IN_BINDTYPE_COUNT; t++)
 282                 result[t] |= binds[IN_BIND_OFFS(key, t)];
 283 }
 284
 285 /* ORs result with binds of pressed buttons
 286  * XXX: should measure performance hit of this func, might need to optimize */
 287 static int in_evdev_update(void *drv_data, const int *binds, int *result)
 288 {
 289         struct input_event ev[16];
 290         struct input_absinfo ainfo;
 291         int keybits_[KEY_CNT / sizeof(int)];
 292         int *keybits = keybits_;
 293         in_evdev_t *dev = drv_data;
 294         int rd, ret, u, lzone;
 295
 296         if (dev->kbits == NULL) {
 297                 ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
 298                 if (ret == -1) {
 299                         perror("in_evdev: ioctl failed");
 300                         return -1;
 301                 }
 302         }
 303         else {
 304                 keybits = dev->kbits;
 305                 while (1) {
 306                         rd = read(dev->fd, ev, sizeof(ev));
 307                         if (rd < (int)sizeof(ev[0])) {
 308                                 if (errno != EAGAIN)
 309                                         perror("in_evdev: read failed");
 310                                 break;
 311                         }
 312                         for (u = 0; u < rd / sizeof(ev[0]); u++) {
 313                                 if (ev[u].type != EV_KEY)
 314                                         continue;
 315                                 else if (ev[u].value == 1)
 316                                         KEYBITS_BIT_SET(ev[u].code);
 317                                 else if (ev[u].value == 0)
 318                                         KEYBITS_BIT_CLEAR(ev[u].code);
 319                         }
 320                 }
 321         }
 322
 323         for (u = dev->kc_first; u <= dev->kc_last; u++) {
 324                 if (KEYBITS_BIT(u))
 325                         or_binds(binds, u, result);
 326         }
 327
 328         /* map X and Y absolute to UDLR */
 329         lzone = dev->abs_lzone;
 330         if (lzone != 0) {
 331                 ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
 332                 if (ret != -1) {
 333                         if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
 334                         if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
 335                 }
 336         }
 337         if (lzone != 0) {
 338                 ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
 339                 if (ret != -1) {
 340                         if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
 341                         if (ainfo.value > dev->abs_max_y - lzone) or_binds(binds, KEY_DOWN, result);
 342                 }
 343         }
 344
 345         return 0;
 346 }
 347
 348 static int in_evdev_set_blocking(in_evdev_t *dev, int y)
 349 {
 350         long flags;
 351         int ret;
 352
 353         flags = (long)fcntl(dev->fd, F_GETFL);
 354         if ((int)flags == -1) {
 355                 perror("in_evdev: F_GETFL fcntl failed");
 356                 return -1;
 357         }
 358
 359         if (flags & O_NONBLOCK) {
 360                 /* flush the event queue */
 361                 struct input_event ev;
 362                 do {
 363                         ret = read(dev->fd, &ev, sizeof(ev));
 364                 }
 365                 while (ret == sizeof(ev));
 366         }
 367
 368         if (y)
 369                 flags &= ~O_NONBLOCK;
 370         else
 371                 flags |=  O_NONBLOCK;
 372         ret = fcntl(dev->fd, F_SETFL, flags);
 373         if (ret == -1) {
 374                 perror("in_evdev: F_SETFL fcntl failed");
 375                 return -1;
 376         }
 377
 378         return 0;
 379 }
 380
 381 static int in_evdev_set_config(void *drv_data, int what, int val)
 382 {
 383         in_evdev_t *dev = drv_data;
 384         int tmp;
 385
 386         switch (what) {
 387         case IN_CFG_BLOCKING:
 388                 return in_evdev_set_blocking(dev, val);
 389         case IN_CFG_ABS_DEAD_ZONE:
 390                 if (val < 1 || val > 99 || dev->abs_lzone == 0)
 391                         return -1;
 392                 /* XXX: based on X axis only, for now.. */
 393                 tmp = (dev->abs_max_x - dev->abs_min_x) / 2;
 394                 dev->abs_lzone = tmp - tmp * val / 100;
 395                 if (dev->abs_lzone < 1)
 396                         dev->abs_lzone = 1;
 397                 else if (dev->abs_lzone >= tmp)
 398                         dev->abs_lzone = tmp - 1;
 399                 break;
 400         default:
 401                 return -1;
 402         }
 403
 404         return 0;
 405 }
 406
 407 static int in_evdev_update_keycode(void *data, int *is_down)
 408 {
 409         int ret_kc = -1, ret_down = 0;
 410         in_evdev_t *dev = data;
 411         struct input_event ev;
 412         int rd;
 413
 414         /* do single event, the caller sometimes wants
 415          * to do select() in blocking mode */
 416         rd = read(dev->fd, &ev, sizeof(ev));
 417         if (rd < (int) sizeof(ev)) {
 418                 if (errno != EAGAIN) {
 419                         perror("in_evdev: error reading");
 420                         //sleep(1);
 421                         ret_kc = -2;
 422                 }
 423                 goto out;
 424         }
 425
 426         if (ev.type == EV_KEY) {
 427                 if (ev.value < 0 || ev.value > 1)
 428                         goto out;
 429                 ret_kc = ev.code;
 430                 ret_down = ev.value;
 431                 goto out;
 432         }
 433         else if (ev.type == EV_ABS)
 434         {
 435                 int lzone = dev->abs_lzone, down = 0, *last;
 436
 437                 // map absolute to up/down/left/right
 438                 if (lzone != 0 && ev.code == ABS_X) {
 439                         if (ev.value < dev->abs_min_x + lzone)
 440                                 down = KEY_LEFT;
 441                         else if (ev.value > dev->abs_max_x - lzone)
 442                                 down = KEY_RIGHT;
 443                         last = &dev->abs_lastx;
 444                 }
 445                 else if (lzone != 0 && ev.code == ABS_Y) {
 446                         if (ev.value < dev->abs_min_y + lzone)
 447                                 down = KEY_UP;
 448                         else if (ev.value > dev->abs_max_y - lzone)
 449                                 down = KEY_DOWN;
 450                         last = &dev->abs_lasty;
 451                 }
 452                 else
 453                         goto out;
 454
 455                 if (down == *last)
 456                         goto out;
 457
 458                 if (down == 0 || *last != 0) {
 459                         /* key up or direction change, return up event for old key */
 460                         ret_kc = *last;
 461                         ret_down = 0;
 462                         *last = 0;
 463                         goto out;
 464                 }
 465                 ret_kc = *last = down;
 466                 ret_down = 1;
 467                 goto out;
 468         }
 469
 470 out:
 471         if (is_down != NULL)
 472                 *is_down = ret_down;
 473
 474         return ret_kc;
 475 }
 476
 477 static const struct {
 478         short key;
 479         short pbtn;
 480 } key_pbtn_map[] =
 481 {
 482         { KEY_UP,       PBTN_UP },
 483         { KEY_DOWN,     PBTN_DOWN },
 484         { KEY_LEFT,     PBTN_LEFT },
 485         { KEY_RIGHT,    PBTN_RIGHT },
 486         /* XXX: maybe better set this from it's plat code somehow */
 487         /* Pandora */
 488         { KEY_END,      PBTN_MOK },
 489         { KEY_PAGEDOWN, PBTN_MBACK },
 490         { KEY_HOME,     PBTN_MA2 },
 491         { KEY_PAGEUP,   PBTN_MA3 },
 492         { KEY_LEFTCTRL,   PBTN_MENU },
 493         { KEY_RIGHTSHIFT, PBTN_L },
 494         { KEY_RIGHTCTRL,  PBTN_R },
 495         /* Caanoo */
 496         { BTN_THUMB2,   PBTN_MOK },
 497         { BTN_THUMB,    PBTN_MBACK },
 498         { BTN_TRIGGER,  PBTN_MA2 },
 499         { BTN_TOP,      PBTN_MA3 },
 500         { BTN_BASE,     PBTN_MENU },
 501         { BTN_TOP2,     PBTN_L },
 502         { BTN_PINKIE,   PBTN_R },
 503         /* "normal" keyboards */
 504         { KEY_ENTER,    PBTN_MOK },
 505         { KEY_ESC,      PBTN_MBACK },
 506         { KEY_A,        PBTN_MA2 },
 507         { KEY_S,        PBTN_MA3 },
 508         { KEY_BACKSLASH,  PBTN_MENU },
 509         { KEY_LEFTBRACE,  PBTN_L },
 510         { KEY_RIGHTBRACE, PBTN_R },
 511 };
 512
 513 #define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
 514
 515 static int in_evdev_menu_translate(void *drv_data, int keycode)
 516 {
 517         in_evdev_t *dev = drv_data;
 518         int i;
 519
 520         if (keycode < 0)
 521         {
 522                 /* menu -> kc */
 523                 keycode = -keycode;
 524                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 525                         if (key_pbtn_map[i].pbtn == keycode) {
 526                                 int k = key_pbtn_map[i].key;
 527                                 /* should really check EVIOCGBIT, but this is enough for now */
 528                                 if (dev->kc_first <= k && k <= dev->kc_last)
 529                                         return k;
 530                         }
 531         }
 532         else
 533         {
 534                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 535                         if (key_pbtn_map[i].key == keycode)
 536                                 return key_pbtn_map[i].pbtn;
 537         }
 538
 539         return 0;
 540 }
 541
 542 static void in_evdev_get_def_binds(int *binds)
 543 {
 544         int i;
 545
 546         for (i = 0; ; i++) {
 547                 if (in_evdev_defbinds[i].bit == 0 && in_evdev_defbinds[i].code == 0)
 548                         break;
 549                 binds[IN_BIND_OFFS(in_evdev_defbinds[i].code, in_evdev_defbinds[i].btype)] =
 550                         1 << in_evdev_defbinds[i].bit;
 551         }
 552 }
 553
 554 /* remove binds of missing keys, count remaining ones */
 555 static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
 556 {
 557         int keybits[KEY_CNT / sizeof(int)];
 558         in_evdev_t *dev = drv_data;
 559         int i, t, ret, offs, count = 0;
 560
 561         memset(keybits, 0, sizeof(keybits));
 562         ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 563         if (ret == -1) {
 564                 perror("in_evdev: ioctl failed");
 565                 // memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
 566         }
 567
 568         if (dev->abs_lzone != 0) {
 569                 KEYBITS_BIT_SET(KEY_LEFT);
 570                 KEYBITS_BIT_SET(KEY_RIGHT);
 571         }
 572         if (dev->abs_lzone != 0) {
 573                 KEYBITS_BIT_SET(KEY_UP);
 574                 KEYBITS_BIT_SET(KEY_DOWN);
 575         }
 576
 577         for (i = 0; i < KEY_CNT; i++) {
 578                 for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
 579                         offs = IN_BIND_OFFS(i, t);
 580                         if (!KEYBITS_BIT(i))
 581                                 binds[offs] = def_binds[offs] = 0;
 582                         if (binds[offs])
 583                                 count++;
 584                 }
 585         }
 586
 587         return count;
 588 }
 589
 590 static const in_drv_t in_evdev_drv = {
 591         .prefix         = IN_EVDEV_PREFIX,
 592         .probe          = in_evdev_probe,
 593         .free           = in_evdev_free,
 594         .get_key_names  = in_evdev_get_key_names,
 595         .get_def_binds  = in_evdev_get_def_binds,
 596         .clean_binds    = in_evdev_clean_binds,
 597         .set_config     = in_evdev_set_config,
 598         .update         = in_evdev_update,
 599         .update_keycode = in_evdev_update_keycode,
 600         .menu_translate = in_evdev_menu_translate,
 601 };
 602
 603 void in_evdev_init(void)
 604 {
 605         in_register_driver(&in_evdev_drv);
 606 }
 607