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