linux/in_evdev.c

   1 /*
   2  * (C) Gražvydas "notaz" Ignotas, 2008-2012
   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  *  - MAME license.
   9  * See the COPYING file in the top-level directory.
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <fcntl.h>
  18 #include <sys/ioctl.h>
  19 #include <unistd.h>
  20 #include <linux/input.h>
  21 #include <errno.h>
  22
  23 #include "../input.h"
  24 #include "in_evdev.h"
  25
  26 #define MAX_ABS_DEVS 8
  27
  28 typedef struct {
  29         int fd;
  30         int *kbits;
  31         int abs_min_x; /* abs->digital mapping */
  32         int abs_max_x;
  33         int abs_min_y;
  34         int abs_max_y;
  35         int abs_lzone;
  36         int abs_lastx;
  37         int abs_lasty;
  38         int kc_first;
  39         int kc_last;
  40         unsigned int abs_count;
  41         int abs_mult[MAX_ABS_DEVS]; /* 16.16 multiplier to IN_ABS_RANGE */
  42         int abs_adj[MAX_ABS_DEVS];  /* adjust for centering */
  43         unsigned int abs_to_digital:1;
  44 } in_evdev_t;
  45
  46 #ifndef KEY_CNT
  47 #define KEY_CNT (KEY_MAX + 1)
  48 #endif
  49
  50 #define KEYBITS_BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
  51         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  52
  53 #define KEYBITS_BIT_SET(x) (keybits[(x)/sizeof(keybits[0])/8] |= \
  54         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  55
  56 #define KEYBITS_BIT_CLEAR(x) (keybits[(x)/sizeof(keybits[0])/8] &= \
  57         ~(1 << ((x) & (sizeof(keybits[0])*8-1))))
  58
  59 int in_evdev_allow_abs_only;
  60
  61 #define IN_EVDEV_PREFIX "evdev:"
  62
  63 static const char * const in_evdev_keys[KEY_CNT] = {
  64         // [0 ... KEY_MAX] = NULL, // not necessary
  65         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
  66         [KEY_1] = "1",                          [KEY_2] = "2",
  67         [KEY_3] = "3",                          [KEY_4] = "4",
  68         [KEY_5] = "5",                          [KEY_6] = "6",
  69         [KEY_7] = "7",                          [KEY_8] = "8",
  70         [KEY_9] = "9",                          [KEY_0] = "0",
  71         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
  72         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
  73         [KEY_Q] = "Q",                          [KEY_W] = "W",
  74         [KEY_E] = "E",                          [KEY_R] = "R",
  75         [KEY_T] = "T",                          [KEY_Y] = "Y",
  76         [KEY_U] = "U",                          [KEY_I] = "I",
  77         [KEY_O] = "O",                          [KEY_P] = "P",
  78         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
  79         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
  80         [KEY_A] = "A",                          [KEY_S] = "S",
  81         [KEY_D] = "D",                          [KEY_F] = "F",
  82         [KEY_G] = "G",                          [KEY_H] = "H",
  83         [KEY_J] = "J",                          [KEY_K] = "K",
  84         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
  85         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
  86         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
  87         [KEY_Z] = "Z",                          [KEY_X] = "X",
  88         [KEY_C] = "C",                          [KEY_V] = "V",
  89         [KEY_B] = "B",                          [KEY_N] = "N",
  90         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
  91         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
  92         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
  93         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
  94         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
  95         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
  96         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
  97         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
  98         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
  99         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
 100         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
 101         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
 102         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
 103         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
 104         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
 105         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
 106         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
 107         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
 108         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
 109         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
 110         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
 111         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
 112         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
 113         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
 114         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
 115         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
 116         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
 117         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
 118         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
 119         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
 120         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
 121         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
 122         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
 123         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
 124         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
 125         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
 126         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
 127         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
 128         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
 129         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
 130         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
 131         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
 132         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
 133         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
 134         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
 135         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
 136         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
 137         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
 138         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
 139         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
 140         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
 141         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
 142         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
 143         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
 144         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
 145         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
 146         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
 147 };
 148
 149
 150 static void in_evdev_probe(void)
 151 {
 152         long keybits[KEY_CNT / sizeof(long) / 8];
 153         long absbits[(ABS_MAX+1) / sizeof(long) / 8];
 154         int i;
 155
 156         // the kernel might support and return less keys then we know about,
 157         // so make sure the buffers are clear.
 158         memset(keybits, 0, sizeof(keybits));
 159         memset(absbits, 0, sizeof(absbits));
 160
 161         for (i = 0;; i++)
 162         {
 163                 int support = 0, count = 0;
 164                 int u, ret, fd, kc_first = KEY_MAX, kc_last = 0, have_abs = 0;
 165                 in_evdev_t *dev;
 166                 char name[64];
 167
 168                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
 169                 fd = open(name, O_RDONLY|O_NONBLOCK);
 170                 if (fd == -1) {
 171                         if (errno == EACCES)
 172                                 continue;       /* maybe we can access next one */
 173                         break;
 174                 }
 175
 176                 /* check supported events */
 177                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
 178                 if (ret == -1) {
 179                         printf("in_evdev: ioctl failed on %s\n", name);
 180                         goto skip;
 181                 }
 182
 183                 if (support & (1 << EV_KEY)) {
 184                         ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 185                         if (ret == -1) {
 186                                 printf("in_evdev: ioctl failed on %s\n", name);
 187                                 goto skip;
 188                         }
 189
 190                         /* check for interesting keys */
 191                         for (u = 0; u < KEY_CNT; u++) {
 192                                 if (KEYBITS_BIT(u)) {
 193                                         if (u < kc_first)
 194                                                 kc_first = u;
 195                                         if (u > kc_last)
 196                                                 kc_last = u;
 197                                         if (u != KEY_POWER && u != KEY_SLEEP && u != BTN_TOUCH)
 198                                                 count++;
 199                                         if (u == BTN_TOUCH) /* we can't deal with ts currently */
 200                                                 goto skip;
 201                                 }
 202                         }
 203                 }
 204
 205                 dev = calloc(1, sizeof(*dev));
 206                 if (dev == NULL)
 207                         goto skip;
 208
 209                 ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
 210                 if (ret == -1) {
 211                         printf("Warning: EVIOCGKEY not supported, will have to track state\n");
 212                         dev->kbits = calloc(KEY_CNT, sizeof(int));
 213                         if (dev->kbits == NULL) {
 214                                 free(dev);
 215                                 goto skip;
 216                         }
 217                 }
 218
 219                 /* check for abs too */
 220                 if (support & (1 << EV_ABS)) {
 221                         struct input_absinfo ainfo;
 222                         int dist;
 223                         ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
 224                         if (ret == -1)
 225                                 goto no_abs;
 226                         if (absbits[0] & (1 << ABS_X)) {
 227                                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 228                                 if (ret == -1)
 229                                         goto no_abs;
 230                                 dist = ainfo.maximum - ainfo.minimum;
 231                                 dev->abs_lzone = dist / 4;
 232                                 dev->abs_min_x = ainfo.minimum;
 233                                 dev->abs_max_x = ainfo.maximum;
 234                         }
 235                         if (absbits[0] & (1 << ABS_Y)) {
 236                                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 237                                 if (ret == -1)
 238                                         goto no_abs;
 239                                 dist = ainfo.maximum - ainfo.minimum;
 240                                 dev->abs_min_y = ainfo.minimum;
 241                                 dev->abs_max_y = ainfo.maximum;
 242                         }
 243                         for (u = 0; u < MAX_ABS_DEVS; u++) {
 244                                 ret = ioctl(fd, EVIOCGABS(u), &ainfo);
 245                                 if (ret == -1)
 246                                         break;
 247                                 dist = ainfo.maximum - ainfo.minimum;
 248                                 if (dist != 0)
 249                                         dev->abs_mult[u] = IN_ABS_RANGE * 2 * 65536 / dist;
 250                                 dev->abs_adj[u] = -(ainfo.maximum + ainfo.minimum + 1) / 2;
 251                                 have_abs = 1;
 252                         }
 253                         dev->abs_count = u;
 254                 }
 255
 256 no_abs:
 257                 if (count == 0 && !have_abs) {
 258                         free(dev);
 259                         goto skip;
 260                 }
 261
 262                 dev->fd = fd;
 263                 dev->kc_first = kc_first;
 264                 dev->kc_last = kc_last;
 265                 if (count > 0 || in_evdev_allow_abs_only)
 266                         dev->abs_to_digital = 1;
 267                 strcpy(name, IN_EVDEV_PREFIX);
 268                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
 269                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
 270                         name+6, count, support);
 271                 in_register(name, fd, dev, KEY_CNT, in_evdev_keys, 0);
 272                 continue;
 273
 274 skip:
 275                 close(fd);
 276         }
 277 }
 278
 279 static void in_evdev_free(void *drv_data)
 280 {
 281         in_evdev_t *dev = drv_data;
 282         if (dev == NULL)
 283                 return;
 284         close(dev->fd);
 285         free(dev);
 286 }
 287
 288 static const char * const *
 289 in_evdev_get_key_names(int *count)
 290 {
 291         *count = KEY_CNT;
 292         return in_evdev_keys;
 293 }
 294
 295 static void or_binds(const int *binds, int key, int *result)
 296 {
 297         int t;
 298         for (t = 0; t < IN_BINDTYPE_COUNT; t++)
 299                 result[t] |= binds[IN_BIND_OFFS(key, t)];
 300 }
 301
 302 /* ORs result with binds of pressed buttons
 303  * XXX: should measure performance hit of this func, might need to optimize */
 304 static int in_evdev_update(void *drv_data, const int *binds, int *result)
 305 {
 306         struct input_event ev[16];
 307         struct input_absinfo ainfo;
 308         int keybits_[KEY_CNT / sizeof(int)];
 309         int *keybits = keybits_;
 310         in_evdev_t *dev = drv_data;
 311         int rd, ret, u, lzone;
 312
 313         if (dev->kbits == NULL) {
 314                 ret = ioctl(dev->fd, EVIOCGKEY(sizeof(keybits_)), keybits_);
 315                 if (ret == -1) {
 316                         perror("in_evdev: ioctl failed");
 317                         return -1;
 318                 }
 319         }
 320         else {
 321                 keybits = dev->kbits;
 322                 while (1) {
 323                         rd = read(dev->fd, ev, sizeof(ev));
 324                         if (rd < (int)sizeof(ev[0])) {
 325                                 if (errno != EAGAIN)
 326                                         perror("in_evdev: read failed");
 327                                 break;
 328                         }
 329                         for (u = 0; u < rd / sizeof(ev[0]); u++) {
 330                                 if (ev[u].type != EV_KEY)
 331                                         continue;
 332                                 else if (ev[u].value == 1)
 333                                         KEYBITS_BIT_SET(ev[u].code);
 334                                 else if (ev[u].value == 0)
 335                                         KEYBITS_BIT_CLEAR(ev[u].code);
 336                         }
 337                 }
 338         }
 339
 340         for (u = dev->kc_first; u <= dev->kc_last; u++) {
 341                 if (KEYBITS_BIT(u))
 342                         or_binds(binds, u, result);
 343         }
 344
 345         /* map X and Y absolute to UDLR */
 346         lzone = dev->abs_lzone;
 347         if (dev->abs_to_digital && lzone != 0) {
 348                 ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
 349                 if (ret != -1) {
 350                         if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
 351                         if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
 352                 }
 353                 ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
 354                 if (ret != -1) {
 355                         if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
 356                         if (ainfo.value > dev->abs_max_y - lzone) or_binds(binds, KEY_DOWN, result);
 357                 }
 358         }
 359
 360         return 0;
 361 }
 362
 363 static int in_evdev_update_analog(void *drv_data, int axis_id, int *result)
 364 {
 365         struct input_absinfo ainfo;
 366         in_evdev_t *dev = drv_data;
 367         int ret;
 368
 369         if ((unsigned int)axis_id >= MAX_ABS_DEVS)
 370                 return -1;
 371
 372         ret = ioctl(dev->fd, EVIOCGABS(axis_id), &ainfo);
 373         if (ret != 0)
 374                 return ret;
 375
 376         *result = (ainfo.value + dev->abs_adj[axis_id]) * dev->abs_mult[axis_id];
 377         *result >>= 16;
 378         return 0;
 379 }
 380
 381 static int in_evdev_set_blocking(in_evdev_t *dev, int y)
 382 {
 383         long flags;
 384         int ret;
 385
 386         flags = (long)fcntl(dev->fd, F_GETFL);
 387         if ((int)flags == -1) {
 388                 perror("in_evdev: F_GETFL fcntl failed");
 389                 return -1;
 390         }
 391
 392         if (flags & O_NONBLOCK) {
 393                 /* flush the event queue */
 394                 struct input_event ev;
 395                 do {
 396                         ret = read(dev->fd, &ev, sizeof(ev));
 397                 }
 398                 while (ret == sizeof(ev));
 399         }
 400
 401         if (y)
 402                 flags &= ~O_NONBLOCK;
 403         else
 404                 flags |=  O_NONBLOCK;
 405         ret = fcntl(dev->fd, F_SETFL, flags);
 406         if (ret == -1) {
 407                 perror("in_evdev: F_SETFL fcntl failed");
 408                 return -1;
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int in_evdev_get_config(void *drv_data, int what, int *val)
 415 {
 416         in_evdev_t *dev = drv_data;
 417
 418         switch (what) {
 419         case IN_CFG_ABS_AXIS_COUNT:
 420                 *val = dev->abs_count;
 421                 break;
 422         default:
 423                 return -1;
 424         }
 425
 426         return 0;
 427 }
 428
 429 static int in_evdev_set_config(void *drv_data, int what, int val)
 430 {
 431         in_evdev_t *dev = drv_data;
 432         int tmp;
 433
 434         switch (what) {
 435         case IN_CFG_BLOCKING:
 436                 return in_evdev_set_blocking(dev, val);
 437         case IN_CFG_ABS_DEAD_ZONE:
 438                 if (val < 1 || val > 99 || dev->abs_lzone == 0)
 439                         return -1;
 440                 /* XXX: based on X axis only, for now.. */
 441                 tmp = (dev->abs_max_x - dev->abs_min_x) / 2;
 442                 dev->abs_lzone = tmp - tmp * val / 100;
 443                 if (dev->abs_lzone < 1)
 444                         dev->abs_lzone = 1;
 445                 else if (dev->abs_lzone >= tmp)
 446                         dev->abs_lzone = tmp - 1;
 447                 break;
 448         default:
 449                 return -1;
 450         }
 451
 452         return 0;
 453 }
 454
 455 static int in_evdev_update_keycode(void *data, int *is_down)
 456 {
 457         int ret_kc = -1, ret_down = 0;
 458         in_evdev_t *dev = data;
 459         struct input_event ev;
 460         int rd;
 461
 462         /* do single event, the caller sometimes wants
 463          * to do select() in blocking mode */
 464         rd = read(dev->fd, &ev, sizeof(ev));
 465         if (rd < (int) sizeof(ev)) {
 466                 if (errno != EAGAIN) {
 467                         perror("in_evdev: error reading");
 468                         //sleep(1);
 469                         ret_kc = -2;
 470                 }
 471                 goto out;
 472         }
 473
 474         if (ev.type == EV_KEY) {
 475                 if (ev.value < 0 || ev.value > 1)
 476                         goto out;
 477                 ret_kc = ev.code;
 478                 ret_down = ev.value;
 479                 goto out;
 480         }
 481         else if (ev.type == EV_ABS && dev->abs_to_digital)
 482         {
 483                 int lzone = dev->abs_lzone, down = 0, *last;
 484
 485                 // map absolute to up/down/left/right
 486                 if (lzone != 0 && ev.code == ABS_X) {
 487                         if (ev.value < dev->abs_min_x + lzone)
 488                                 down = KEY_LEFT;
 489                         else if (ev.value > dev->abs_max_x - lzone)
 490                                 down = KEY_RIGHT;
 491                         last = &dev->abs_lastx;
 492                 }
 493                 else if (lzone != 0 && ev.code == ABS_Y) {
 494                         if (ev.value < dev->abs_min_y + lzone)
 495                                 down = KEY_UP;
 496                         else if (ev.value > dev->abs_max_y - lzone)
 497                                 down = KEY_DOWN;
 498                         last = &dev->abs_lasty;
 499                 }
 500                 else
 501                         goto out;
 502
 503                 if (down == *last)
 504                         goto out;
 505
 506                 if (down == 0 || *last != 0) {
 507                         /* key up or direction change, return up event for old key */
 508                         ret_kc = *last;
 509                         ret_down = 0;
 510                         *last = 0;
 511                         goto out;
 512                 }
 513                 ret_kc = *last = down;
 514                 ret_down = 1;
 515                 goto out;
 516         }
 517
 518 out:
 519         if (is_down != NULL)
 520                 *is_down = ret_down;
 521
 522         return ret_kc;
 523 }
 524
 525 static const struct {
 526         short key;
 527         short pbtn;
 528 } key_pbtn_map[] =
 529 {
 530         { KEY_UP,       PBTN_UP },
 531         { KEY_DOWN,     PBTN_DOWN },
 532         { KEY_LEFT,     PBTN_LEFT },
 533         { KEY_RIGHT,    PBTN_RIGHT },
 534         /* XXX: maybe better set this from it's plat code somehow */
 535         /* Pandora */
 536         { KEY_END,      PBTN_MOK },
 537         { KEY_PAGEDOWN, PBTN_MBACK },
 538         { KEY_HOME,     PBTN_MA2 },
 539         { KEY_PAGEUP,   PBTN_MA3 },
 540         { KEY_LEFTCTRL,   PBTN_MENU },
 541         { KEY_RIGHTSHIFT, PBTN_L },
 542         { KEY_RIGHTCTRL,  PBTN_R },
 543         /* Caanoo */
 544         { BTN_THUMB2,   PBTN_MOK },
 545         { BTN_THUMB,    PBTN_MBACK },
 546         { BTN_TRIGGER,  PBTN_MA2 },
 547         { BTN_TOP,      PBTN_MA3 },
 548         { BTN_BASE,     PBTN_MENU },
 549         { BTN_TOP2,     PBTN_L },
 550         { BTN_PINKIE,   PBTN_R },
 551         /* "normal" keyboards */
 552         { KEY_ENTER,    PBTN_MOK },
 553         { KEY_ESC,      PBTN_MBACK },
 554         { KEY_A,        PBTN_MA2 },
 555         { KEY_S,        PBTN_MA3 },
 556         { KEY_BACKSLASH,  PBTN_MENU },
 557         { KEY_LEFTBRACE,  PBTN_L },
 558         { KEY_RIGHTBRACE, PBTN_R },
 559 };
 560
 561 #define KEY_PBTN_MAP_SIZE (sizeof(key_pbtn_map) / sizeof(key_pbtn_map[0]))
 562
 563 static int in_evdev_menu_translate(void *drv_data, int keycode, char *charcode)
 564 {
 565         in_evdev_t *dev = drv_data;
 566         int ret = 0;
 567         int i;
 568
 569         if (keycode < 0)
 570         {
 571                 /* menu -> kc */
 572                 keycode = -keycode;
 573                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++)
 574                         if (key_pbtn_map[i].pbtn == keycode) {
 575                                 int k = key_pbtn_map[i].key;
 576                                 /* should really check EVIOCGBIT, but this is enough for now */
 577                                 if (dev->kc_first <= k && k <= dev->kc_last)
 578                                         return k;
 579                         }
 580         }
 581         else
 582         {
 583                 for (i = 0; i < KEY_PBTN_MAP_SIZE; i++) {
 584                         if (key_pbtn_map[i].key == keycode) {
 585                                 ret = key_pbtn_map[i].pbtn;
 586                                 break;
 587                         }
 588                 }
 589
 590                 if (charcode != NULL && (unsigned int)keycode < KEY_CNT &&
 591                     in_evdev_keys[keycode] != NULL && in_evdev_keys[keycode][1] == 0)
 592                 {
 593                         char c = in_evdev_keys[keycode][0];
 594                         if ('A' <= c && c <= 'Z')
 595                                 c = 'a' + c - 'A';
 596                         ret |= PBTN_CHAR;
 597                         *charcode = c;
 598                 }
 599         }
 600
 601         return ret;
 602 }
 603
 604 /* remove binds of missing keys, count remaining ones */
 605 static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
 606 {
 607         int keybits[KEY_CNT / sizeof(int)];
 608         in_evdev_t *dev = drv_data;
 609         int i, t, ret, offs, count = 0;
 610
 611         memset(keybits, 0, sizeof(keybits));
 612         ret = ioctl(dev->fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 613         if (ret == -1) {
 614                 perror("in_evdev: ioctl failed");
 615                 // memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
 616         }
 617
 618         if (dev->abs_to_digital && dev->abs_lzone != 0) {
 619                 KEYBITS_BIT_SET(KEY_LEFT);
 620                 KEYBITS_BIT_SET(KEY_RIGHT);
 621                 KEYBITS_BIT_SET(KEY_UP);
 622                 KEYBITS_BIT_SET(KEY_DOWN);
 623         }
 624
 625         for (i = 0; i < KEY_CNT; i++) {
 626                 for (t = 0; t < IN_BINDTYPE_COUNT; t++) {
 627                         offs = IN_BIND_OFFS(i, t);
 628                         if (!KEYBITS_BIT(i))
 629                                 binds[offs] = def_binds[offs] = 0;
 630                         if (binds[offs])
 631                                 count++;
 632                 }
 633         }
 634
 635         return count;
 636 }
 637
 638 static const in_drv_t in_evdev_drv = {
 639         .prefix         = IN_EVDEV_PREFIX,
 640         .probe          = in_evdev_probe,
 641         .free           = in_evdev_free,
 642         .get_key_names  = in_evdev_get_key_names,
 643         .clean_binds    = in_evdev_clean_binds,
 644         .get_config     = in_evdev_get_config,
 645         .set_config     = in_evdev_set_config,
 646         .update         = in_evdev_update,
 647         .update_analog  = in_evdev_update_analog,
 648         .update_keycode = in_evdev_update_keycode,
 649         .menu_translate = in_evdev_menu_translate,
 650 };
 651
 652 void in_evdev_init(const struct in_default_bind *defbinds)
 653 {
 654         in_register_driver(&in_evdev_drv, defbinds);
 655 }
 656