linux/in_evdev.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include <fcntl.h>
   7 #include <sys/ioctl.h>
   8 #include <unistd.h>
   9 #include <linux/input.h>
  10 #include <errno.h>
  11
  12 #include "../common/input.h"
  13 #include "in_evdev.h"
  14
  15 typedef struct {
  16         int fd;
  17         int *kbits;
  18         int abs_lzone;
  19         int abs_rzone;
  20         int abs_tzone;
  21         int abs_bzone;
  22         int abs_lastx;
  23         int abs_lasty;
  24 } in_evdev_t;
  25
  26 #ifndef KEY_CNT
  27 #define KEY_CNT (KEY_MAX + 1)
  28 #endif
  29
  30 #define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
  31         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  32
  33 #define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] |= \
  34         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  35
  36 #define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
  37         ~(1 << ((x) & (sizeof(keybits[0])*8-1))))
  38
  39 static const char * const in_evdev_prefix = "evdev:";
  40 static const char * const in_evdev_keys[KEY_CNT] = {
  41         [0 ... KEY_MAX] = NULL,
  42         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
  43         [KEY_1] = "1",                          [KEY_2] = "2",
  44         [KEY_3] = "3",                          [KEY_4] = "4",
  45         [KEY_5] = "5",                          [KEY_6] = "6",
  46         [KEY_7] = "7",                          [KEY_8] = "8",
  47         [KEY_9] = "9",                          [KEY_0] = "0",
  48         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
  49         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
  50         [KEY_Q] = "Q",                          [KEY_W] = "W",
  51         [KEY_E] = "E",                          [KEY_R] = "R",
  52         [KEY_T] = "T",                          [KEY_Y] = "Y",
  53         [KEY_U] = "U",                          [KEY_I] = "I",
  54         [KEY_O] = "O",                          [KEY_P] = "P",
  55         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
  56         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
  57         [KEY_A] = "A",                          [KEY_S] = "S",
  58         [KEY_D] = "D",                          [KEY_F] = "F",
  59         [KEY_G] = "G",                          [KEY_H] = "H",
  60         [KEY_J] = "J",                          [KEY_K] = "K",
  61         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
  62         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
  63         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
  64         [KEY_Z] = "Z",                          [KEY_X] = "X",
  65         [KEY_C] = "C",                          [KEY_V] = "V",
  66         [KEY_B] = "B",                          [KEY_N] = "N",
  67         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
  68         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
  69         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
  70         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
  71         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
  72         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
  73         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
  74         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
  75         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
  76         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
  77         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
  78         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
  79         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
  80         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
  81         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
  82         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
  83         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
  84         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
  85         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
  86         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
  87         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
  88         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
  89         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
  90         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
  91         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
  92         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
  93         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
  94         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
  95         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
  96         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
  97         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
  98         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
  99         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
 100         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
 101         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
 102         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
 103         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
 104         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
 105         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
 106         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
 107         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
 108         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
 109         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
 110         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
 111         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
 112         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
 113         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
 114         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
 115         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
 116         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
 117         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
 118         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
 119         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
 120         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
 121         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
 122         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
 123         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
 124 };
 125
 126
 127 static void in_evdev_probe(void)
 128 {
 129         long keybits[KEY_CNT / sizeof(long) / 8];
 130         long absbits[(ABS_MAX+1) / sizeof(long) / 8];
 131         int i;
 132
 133         // the kernel might support and return less keys then we know about,
 134         // so make sure the buffers are clear.
 135         memset(keybits, 0, sizeof(keybits));
 136         memset(absbits, 0, sizeof(absbits));
 137
 138         for (i = 0;; i++)
 139         {
 140                 int support = 0, count = 0;
 141                 in_evdev_t *dev;
 142                 int u, ret, fd;
 143                 char name[64];
 144
 145                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
 146                 fd = open(name, O_RDONLY|O_NONBLOCK);
 147                 if (fd == -1) {
 148                         if (errno == EACCES)
 149                                 continue;       /* maybe we can access next one */
 150                         break;
 151                 }
 152
 153                 /* check supported events */
 154                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
 155                 if (ret == -1) {
 156                         printf("in_evdev: ioctl failed on %s\n", name);
 157                         goto skip;
 158                 }
 159
 160                 if (!(support & (1 << EV_KEY)))
 161                         goto skip;
 162
 163                 ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 164                 if (ret == -1) {
 165                         printf("in_evdev: ioctl failed on %s\n", name);
 166                         goto skip;
 167                 }
 168
 169                 /* check for interesting keys */
 170                 for (u = 0; u < KEY_CNT; u++) {
 171                         if (KEYBITS_BIT(u) && u != KEY_POWER &&
 172                                         u != KEY_SLEEP && u != BTN_TOUCH)
 173                                 count++;
 174                 }
 175
 176                 if (count == 0)
 177                         goto skip;
 178
 179                 dev = calloc(1, sizeof(*dev));
 180                 if (dev == NULL)
 181                         goto skip;
 182
 183                 ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
 184                 if (ret == -1) {
 185                         printf("Warning: EVIOCGKEY not supported, will have to track state\n");
 186                         dev->kbits = calloc(KEY_CNT, sizeof(int));
 187                         if (dev->kbits == NULL) {
 188                                 free(dev);
 189                                 goto skip;
 190                         }
 191                 }
 192
 193                 /* check for abs too */
 194                 if (support & (1 << EV_ABS)) {
 195                         struct input_absinfo ainfo;
 196                         int dist;
 197                         ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
 198                         if (ret == -1)
 199                                 goto no_abs;
 200                         if (absbits[0] & (1 << ABS_X)) {
 201                                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 202                                 if (ret == -1)
 203                                         goto no_abs;
 204                                 dist = ainfo.maximum - ainfo.minimum;
 205                                 dev->abs_lzone = ainfo.minimum + dist / 4;
 206                                 dev->abs_rzone = ainfo.maximum - dist / 4;
 207                         }
 208                         if (absbits[0] & (1 << ABS_Y)) {
 209                                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 210                                 if (ret == -1)
 211                                         goto no_abs;
 212                                 dist = ainfo.maximum - ainfo.minimum;
 213                                 dev->abs_tzone = ainfo.minimum + dist / 4;
 214                                 dev->abs_bzone = ainfo.maximum - dist / 4;
 215                         }
 216                 }
 217
 218 no_abs:
 219                 dev->fd = fd;
 220                 strcpy(name, in_evdev_prefix);
 221                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
 222                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
 223                         name+6, count, support);
 224                 in_register(name, IN_DRVID_EVDEV, fd, dev, KEY_CNT, 0);
 225                 continue;
 226
 227 skip:
 228                 close(fd);
 229         }
 230 }
 231
 232 static void in_evdev_free(void *drv_data)
 233 {
 234         in_evdev_t *dev = drv_data;
 235         if (dev == NULL)
 236                 return;
 237         close(dev->fd);
 238         free(dev);
 239 }
 240
 241 static int in_evdev_get_bind_count(void)
 242 {
 243         return KEY_CNT;
 244 }
 245
 246 static void or_binds(const int *binds, int key, int *result)
 247 {
 248         int t;
 249         for (t = 0; t < IN_BINDTYPE_COUNT; t++)
 250                 result[t] |= binds[IN_BIND_OFFS(key, t)];
 251 }
 252
 253 /* ORs result with binds of pressed buttons
 254  * XXX: should measure performance hit of this func, might need to optimize */
 255 int in_evdev_update(void *drv_data, const int *binds, int *result)
 256 {
 257         struct input_event ev[16];
 258         struct input_absinfo ainfo;
 259         int keybits_[KEY_CNT / sizeof(int)];
 260         int *keybits = keybits_;
 261         in_evdev_t *dev = drv_data;
 262         int rd, ret, u;
 263
 264         if (dev->kbits == NULL) {
 265                 ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
 266                 if (ret == -1) {
 267                         perror("in_evdev: ioctl failed");
 268                         return -1;
 269                 }
 270         }
 271         else {
 272                 keybits = dev->kbits;
 273                 while (1) {
 274                         rd = read(dev->fd, ev, sizeof(ev));
 275                         if (rd < (int)sizeof(ev[0])) {
 276                                 if (errno != EAGAIN)
 277                                         perror("in_evdev: read failed");
 278                                 break;
 279                         }
 280                         for (u = 0; u < rd / sizeof(ev[0]); u++) {
 281                                 if (ev[u].type != EV_KEY)
 282                                         continue;
 283                                 else if (ev[u].value == 1)
 284                                         KEYBITS_BIT_SET(ev[u].code);
 285                                 else if (ev[u].value == 0)
 286                                         KEYBITS_BIT_CLEAR(ev[u].code);
 287                         }
 288                 }
 289         }
 290
 291         for (u = 0; u < KEY_CNT; u++) {
 292                 if (KEYBITS_BIT(u))
 293                         or_binds(binds, u, result);
 294         }
 295
 296         /* map X and Y absolute to UDLR */
 297         if (dev->abs_lzone != 0) {
 298                 ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
 299                 if (ret != -1) {
 300                         if (ainfo.value < dev->abs_lzone) or_binds(binds, KEY_LEFT, result);
 301                         if (ainfo.value > dev->abs_rzone) or_binds(binds, KEY_RIGHT, result);
 302                 }
 303         }
 304         if (dev->abs_tzone != 0) {
 305                 ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
 306                 if (ret != -1) {
 307                         if (ainfo.value < dev->abs_tzone) or_binds(binds, KEY_UP, result);
 308                         if (ainfo.value > dev->abs_bzone) or_binds(binds, KEY_DOWN, result);
 309                 }
 310         }
 311
 312         return 0;
 313 }
 314
 315 static void in_evdev_set_blocking(void *drv_data, int y)
 316 {
 317         in_evdev_t *dev = drv_data;
 318         long flags;
 319         int ret;
 320
 321         flags = (long)fcntl(dev->fd, F_GETFL);
 322         if ((int)flags == -1) {
 323                 perror("in_evdev: F_GETFL fcntl failed");
 324                 return;
 325         }
 326
 327         if (flags & O_NONBLOCK) {
 328                 /* flush the event queue */
 329                 struct input_event ev;
 330                 do {
 331                         ret = read(dev->fd, &ev, sizeof(ev));
 332                 }
 333                 while (ret == sizeof(ev));
 334         }
 335
 336         if (y)
 337                 flags &= ~O_NONBLOCK;
 338         else
 339                 flags |=  O_NONBLOCK;
 340         ret = fcntl(dev->fd, F_SETFL, flags);
 341         if (ret == -1)
 342                 perror("in_evdev: F_SETFL fcntl failed");
 343 }
 344
 345 static int in_evdev_update_keycode(void *data, int *is_down)
 346 {
 347         in_evdev_t *dev = data;
 348         struct input_event ev;
 349         int rd;
 350
 351         if (is_down != NULL)
 352                 *is_down = 0;
 353
 354         rd = read(dev->fd, &ev, sizeof(ev));
 355         if (rd < (int) sizeof(ev)) {
 356                 if (errno != EAGAIN) {
 357                         perror("in_evdev: error reading");
 358                         sleep(1);
 359                 }
 360                 return -1;
 361         }
 362
 363         if (ev.type == EV_KEY) {
 364                 if (ev.value < 0 || ev.value > 1)
 365                         return -1;
 366                 if (is_down != NULL)
 367                         *is_down = ev.value;
 368                 return ev.code;
 369         }
 370         else if (ev.type == EV_ABS)
 371         {
 372                 int down = 0;
 373                 if (dev->abs_lzone != 0 && ev.code == ABS_X) {
 374                         if (ev.value < dev->abs_lzone) {
 375                                 down = 1;
 376                                 dev->abs_lastx = KEY_LEFT;
 377                         }
 378                         else if (ev.value > dev->abs_rzone) {
 379                                 down = 1;
 380                                 dev->abs_lastx = KEY_RIGHT;
 381                         }
 382                         if (is_down != NULL)
 383                                 *is_down = down;
 384                         return dev->abs_lastx;
 385                 }
 386                 if (dev->abs_tzone != 0 && ev.code == ABS_Y) {
 387                         if (ev.value < dev->abs_tzone) {
 388                                 down = 1;
 389                                 dev->abs_lasty = KEY_UP;
 390                         }
 391                         else if (ev.value > dev->abs_bzone) {
 392                                 down = 1;
 393                                 dev->abs_lasty = KEY_DOWN;
 394                         }
 395                         if (is_down != NULL)
 396                                 *is_down = down;
 397                         return dev->abs_lasty;
 398                 }
 399         }
 400
 401         return -1;
 402 }
 403
 404 static const struct {
 405         short key;
 406         short pbtn;
 407 } key_pbtn_map[] =
 408 {
 409         { KEY_UP,       PBTN_UP },
 410         { KEY_DOWN,     PBTN_DOWN },
 411         { KEY_LEFT,     PBTN_LEFT },
 412         { KEY_RIGHT,    PBTN_RIGHT },
 413         { KEY_ENTER,    PBTN_MOK },
 414         { KEY_KP2,      PBTN_MOK },
 415         { BTN_TRIGGER,  PBTN_MOK },
 416         { KEY_ESC,      PBTN_MBACK },
 417         { KEY_KP3,      PBTN_MBACK },
 418         { BTN_THUMB,    PBTN_MBACK },
 419         { KEY_A,        PBTN_MA2 },
 420         { KEY_KP4,      PBTN_MA2 },
 421         { KEY_S,        PBTN_MA3 },
 422         { KEY_KP1,      PBTN_MA3 },
 423         { KEY_BACKSLASH,  PBTN_MENU },
 424         { KEY_LEFTCTRL,   PBTN_MENU },
 425         { BTN_TL,         PBTN_L },
 426         { KEY_LEFTBRACE,  PBTN_L },
 427         { BTN_TR,         PBTN_R },
 428         { KEY_RIGHTBRACE, PBTN_R },
 429 };
 430
 431 #define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
 432
 433 static int in_evdev_menu_translate(int keycode)
 434 {
 435         int i;
 436         if (keycode < 0)
 437         {
 438                 /* menu -> kc */
 439                 keycode = -keycode;
 440                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 441                         if (key_pbtn_map[i].pbtn == keycode)
 442                                 return key_pbtn_map[i].key;
 443         }
 444         else
 445         {
 446                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 447                         if (key_pbtn_map[i].key == keycode)
 448                                 return key_pbtn_map[i].pbtn;
 449         }
 450
 451         return 0;
 452 }
 453
 454 static int in_evdev_get_key_code(const char *key_name)
 455 {
 456         int i;
 457
 458         for (i = 0; i < KEY_CNT; i++) {
 459                 const char *k = in_evdev_keys[i];
 460                 if (k != NULL && strcasecmp(k, key_name) == 0)
 461                         return i;
 462         }
 463
 464         return -1;
 465 }
 466
 467 static const char *in_evdev_get_key_name(int keycode)
 468 {
 469         const char *name = NULL;
 470         if (keycode >= 0 && keycode <= KEY_MAX)
 471                 name = in_evdev_keys[keycode];
 472         if (name == NULL)
 473                 name = "Unkn";
 474
 475         return name;
 476 }
 477
 478 static const struct {
 479         short code;
 480         char btype;
 481         char bit;
 482 } in_evdev_def_binds[] =
 483 {
 484         /* MXYZ SACB RLDU */
 485         { KEY_UP,       IN_BINDTYPE_PLAYER12, 0 },
 486         { KEY_DOWN,     IN_BINDTYPE_PLAYER12, 1 },
 487         { KEY_LEFT,     IN_BINDTYPE_PLAYER12, 2 },
 488         { KEY_RIGHT,    IN_BINDTYPE_PLAYER12, 3 },
 489         { KEY_S,        IN_BINDTYPE_PLAYER12, 4 },      /* B */
 490         { KEY_KP3,      IN_BINDTYPE_PLAYER12, 4 },
 491         { KEY_D,        IN_BINDTYPE_PLAYER12, 5 },      /* C */
 492         { KEY_KP2,      IN_BINDTYPE_PLAYER12, 5 },
 493         { KEY_A,        IN_BINDTYPE_PLAYER12, 6 },      /* A */
 494         { KEY_KP4,      IN_BINDTYPE_PLAYER12, 6 },
 495         { KEY_ENTER,    IN_BINDTYPE_PLAYER12, 7 },
 496         { KEY_LEFTALT,  IN_BINDTYPE_PLAYER12, 7 },
 497         { BTN_TL,       IN_BINDTYPE_EMU, PEVB_STATE_LOAD },
 498         { BTN_TR,       IN_BINDTYPE_EMU, PEVB_STATE_SAVE },
 499         { KEY_LEFTCTRL, IN_BINDTYPE_EMU, PEVB_MENU },
 500 };
 501
 502 #define DEF_BIND_COUNT (sizeof(in_evdev_def_binds) / sizeof(in_evdev_def_binds[0]))
 503
 504 static void in_evdev_get_def_binds(int *binds)
 505 {
 506         int i;
 507
 508         for (i = 0; i < DEF_BIND_COUNT; i++)
 509                 binds[IN_BIND_OFFS(in_evdev_def_binds[i].code, in_evdev_def_binds[i].btype)] =
 510                         1 << in_evdev_def_binds[i].bit;
 511 }
 512
 513 /* remove binds of missing keys, count remaining ones */
 514 static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
 515 {
 516         int keybits[KEY_CNT / sizeof(int)];
 517         in_evdev_t *dev = drv_data;
 518         int i, t, ret, offs, count = 0;
 519
 520         ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 521         if (ret == -1) {
 522                 perror("in_evdev: ioctl failed");
 523                 memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
 524         }
 525
 526         if (dev->abs_lzone != 0) {
 527                 KEYBITS_BIT_SET(KEY_LEFT);
 528                 KEYBITS_BIT_SET(KEY_RIGHT);
 529         }
 530         if (dev->abs_tzone != 0) {
 531                 KEYBITS_BIT_SET(KEY_UP);
 532                 KEYBITS_BIT_SET(KEY_DOWN);
 533         }
 534
 535         for (i = 0; i < KEY_CNT; i++) {
 536                 for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
 537                         offs = IN_BIND_OFFS(i, t);
 538                         if (!KEYBITS_BIT(i))
 539                                 binds[offs] = def_binds[offs] = 0;
 540                         if (binds[offs])
 541                                 count++;
 542                 }
 543         }
 544
 545         return count;
 546 }
 547
 548 void in_evdev_init(void *vdrv)
 549 {
 550         in_drv_t *drv = vdrv;
 551
 552         drv->prefix = in_evdev_prefix;
 553         drv->probe = in_evdev_probe;
 554         drv->free = in_evdev_free;
 555         drv->get_bind_count = in_evdev_get_bind_count;
 556         drv->get_def_binds = in_evdev_get_def_binds;
 557         drv->clean_binds = in_evdev_clean_binds;
 558         drv->set_blocking = in_evdev_set_blocking;
 559         drv->update_keycode = in_evdev_update_keycode;
 560         drv->menu_translate = in_evdev_menu_translate;
 561         drv->get_key_code = in_evdev_get_key_code;
 562         drv->get_key_name = in_evdev_get_key_name;
 563 }
 564