linux/in_evdev.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <sys/ioctl.h>
   7 #include <unistd.h>
   8 #include <linux/input.h>
   9 #include <errno.h>
  10
  11 #include "../common/common.h"
  12 #include "../common/input.h"
  13 #include "in_evdev.h"
  14
  15 #define BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \
  16         (1 << ((x) & (sizeof(keybits[0])*8-1))))
  17
  18 static const char *in_evdev_keys[KEY_MAX + 1] = {
  19         [0 ... KEY_MAX] = NULL,
  20         [KEY_RESERVED] = "Reserved",            [KEY_ESC] = "Esc",
  21         [KEY_1] = "1",                          [KEY_2] = "2",
  22         [KEY_3] = "3",                          [KEY_4] = "4",
  23         [KEY_5] = "5",                          [KEY_6] = "6",
  24         [KEY_7] = "7",                          [KEY_8] = "8",
  25         [KEY_9] = "9",                          [KEY_0] = "0",
  26         [KEY_MINUS] = "Minus",                  [KEY_EQUAL] = "Equal",
  27         [KEY_BACKSPACE] = "Backspace",          [KEY_TAB] = "Tab",
  28         [KEY_Q] = "Q",                          [KEY_W] = "W",
  29         [KEY_E] = "E",                          [KEY_R] = "R",
  30         [KEY_T] = "T",                          [KEY_Y] = "Y",
  31         [KEY_U] = "U",                          [KEY_I] = "I",
  32         [KEY_O] = "O",                          [KEY_P] = "P",
  33         [KEY_LEFTBRACE] = "LeftBrace",          [KEY_RIGHTBRACE] = "RightBrace",
  34         [KEY_ENTER] = "Enter",                  [KEY_LEFTCTRL] = "LeftControl",
  35         [KEY_A] = "A",                          [KEY_S] = "S",
  36         [KEY_D] = "D",                          [KEY_F] = "F",
  37         [KEY_G] = "G",                          [KEY_H] = "H",
  38         [KEY_J] = "J",                          [KEY_K] = "K",
  39         [KEY_L] = "L",                          [KEY_SEMICOLON] = "Semicolon",
  40         [KEY_APOSTROPHE] = "Apostrophe",        [KEY_GRAVE] = "Grave",
  41         [KEY_LEFTSHIFT] = "LeftShift",          [KEY_BACKSLASH] = "BackSlash",
  42         [KEY_Z] = "Z",                          [KEY_X] = "X",
  43         [KEY_C] = "C",                          [KEY_V] = "V",
  44         [KEY_B] = "B",                          [KEY_N] = "N",
  45         [KEY_M] = "M",                          [KEY_COMMA] = "Comma",
  46         [KEY_DOT] = "Dot",                      [KEY_SLASH] = "Slash",
  47         [KEY_RIGHTSHIFT] = "RightShift",        [KEY_KPASTERISK] = "KPAsterisk",
  48         [KEY_LEFTALT] = "LeftAlt",              [KEY_SPACE] = "Space",
  49         [KEY_CAPSLOCK] = "CapsLock",            [KEY_F1] = "F1",
  50         [KEY_F2] = "F2",                        [KEY_F3] = "F3",
  51         [KEY_F4] = "F4",                        [KEY_F5] = "F5",
  52         [KEY_F6] = "F6",                        [KEY_F7] = "F7",
  53         [KEY_F8] = "F8",                        [KEY_F9] = "F9",
  54         [KEY_F10] = "F10",                      [KEY_NUMLOCK] = "NumLock",
  55         [KEY_SCROLLLOCK] = "ScrollLock",        [KEY_KP7] = "KP7",
  56         [KEY_KP8] = "KP8",                      [KEY_KP9] = "KP9",
  57         [KEY_KPMINUS] = "KPMinus",              [KEY_KP4] = "KP4",
  58         [KEY_KP5] = "KP5",                      [KEY_KP6] = "KP6",
  59         [KEY_KPPLUS] = "KPPlus",                [KEY_KP1] = "KP1",
  60         [KEY_KP2] = "KP2",                      [KEY_KP3] = "KP3",
  61         [KEY_KP0] = "KP0",                      [KEY_KPDOT] = "KPDot",
  62         [KEY_ZENKAKUHANKAKU] = "Zenkaku/Hankaku", [KEY_102ND] = "102nd",
  63         [KEY_F11] = "F11",                      [KEY_F12] = "F12",
  64         [KEY_KPJPCOMMA] = "KPJpComma",          [KEY_KPENTER] = "KPEnter",
  65         [KEY_RIGHTCTRL] = "RightCtrl",          [KEY_KPSLASH] = "KPSlash",
  66         [KEY_SYSRQ] = "SysRq",                  [KEY_RIGHTALT] = "RightAlt",
  67         [KEY_LINEFEED] = "LineFeed",            [KEY_HOME] = "Home",
  68         [KEY_UP] = "Up",                        [KEY_PAGEUP] = "PageUp",
  69         [KEY_LEFT] = "Left",                    [KEY_RIGHT] = "Right",
  70         [KEY_END] = "End",                      [KEY_DOWN] = "Down",
  71         [KEY_PAGEDOWN] = "PageDown",            [KEY_INSERT] = "Insert",
  72         [KEY_DELETE] = "Delete",                [KEY_MACRO] = "Macro",
  73         [KEY_HELP] = "Help",                    [KEY_MENU] = "Menu",
  74         [KEY_COFFEE] = "Coffee",                [KEY_DIRECTION] = "Direction",
  75         [BTN_0] = "Btn0",                       [BTN_1] = "Btn1",
  76         [BTN_2] = "Btn2",                       [BTN_3] = "Btn3",
  77         [BTN_4] = "Btn4",                       [BTN_5] = "Btn5",
  78         [BTN_6] = "Btn6",                       [BTN_7] = "Btn7",
  79         [BTN_8] = "Btn8",                       [BTN_9] = "Btn9",
  80         [BTN_LEFT] = "LeftBtn",                 [BTN_RIGHT] = "RightBtn",
  81         [BTN_MIDDLE] = "MiddleBtn",             [BTN_SIDE] = "SideBtn",
  82         [BTN_EXTRA] = "ExtraBtn",               [BTN_FORWARD] = "ForwardBtn",
  83         [BTN_BACK] = "BackBtn",                 [BTN_TASK] = "TaskBtn",
  84         [BTN_TRIGGER] = "Trigger",              [BTN_THUMB] = "ThumbBtn",
  85         [BTN_THUMB2] = "ThumbBtn2",             [BTN_TOP] = "TopBtn",
  86         [BTN_TOP2] = "TopBtn2",                 [BTN_PINKIE] = "PinkieBtn",
  87         [BTN_BASE] = "BaseBtn",                 [BTN_BASE2] = "BaseBtn2",
  88         [BTN_BASE3] = "BaseBtn3",               [BTN_BASE4] = "BaseBtn4",
  89         [BTN_BASE5] = "BaseBtn5",               [BTN_BASE6] = "BaseBtn6",
  90         [BTN_DEAD] = "BtnDead",                 [BTN_A] = "BtnA",
  91         [BTN_B] = "BtnB",                       [BTN_C] = "BtnC",
  92         [BTN_X] = "BtnX",                       [BTN_Y] = "BtnY",
  93         [BTN_Z] = "BtnZ",                       [BTN_TL] = "BtnTL",
  94         [BTN_TR] = "BtnTR",                     [BTN_TL2] = "BtnTL2",
  95         [BTN_TR2] = "BtnTR2",                   [BTN_SELECT] = "BtnSelect",
  96         [BTN_START] = "BtnStart",               [BTN_MODE] = "BtnMode",
  97         [BTN_THUMBL] = "BtnThumbL",             [BTN_THUMBR] = "BtnThumbR",
  98         [BTN_TOUCH] = "Touch",                  [BTN_STYLUS] = "Stylus",
  99         [BTN_STYLUS2] = "Stylus2",              [BTN_TOOL_DOUBLETAP] = "Tool Doubletap",
 100         [BTN_TOOL_TRIPLETAP] = "Tool Tripletap", [BTN_GEAR_DOWN] = "WheelBtn",
 101         [BTN_GEAR_UP] = "Gear up",              [KEY_OK] = "Ok",
 102 };
 103
 104
 105 int in_evdev_probe(void)
 106 {
 107         int i;
 108
 109         for (i = 0;; i++)
 110         {
 111                 int u, ret, fd, keybits[KEY_MAX/sizeof(int)];
 112                 int support = 0, count = 0;
 113                 char name[64];
 114
 115                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
 116                 fd = open(name, O_RDONLY|O_NONBLOCK);
 117                 if (fd == -1)
 118                         break;
 119
 120                 /* check supported events */
 121                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
 122                 if (ret == -1) {
 123                         printf("in_evdev: ioctl failed on %s\n", name);
 124                         goto skip;
 125                 }
 126
 127                 if (!(support & (1 << EV_KEY)))
 128                         goto skip;
 129
 130                 ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
 131                 if (ret == -1) {
 132                         printf("in_evdev: ioctl failed on %s\n", name);
 133                         goto skip;
 134                 }
 135
 136                 /* check for interesting keys */
 137                 for (u = 0; u < KEY_MAX; u++) {
 138                         if (BIT(u) && u != KEY_POWER && u != KEY_SLEEP)
 139                                 count++;
 140                 }
 141
 142                 if (count == 0)
 143                         goto skip;
 144
 145                 strcpy(name, "evdev:");
 146                 ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
 147                 printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
 148                         name+6, count, support);
 149                 in_register(name, IN_DRVID_EVDEV, (void *)fd);
 150                 continue;
 151
 152 skip:
 153                 close(fd);
 154         }
 155
 156         return 0;
 157 }
 158
 159 void in_evdev_free(void *drv_data)
 160 {
 161         close((int)drv_data);
 162 }
 163
 164 int in_evdev_bind_count(void)
 165 {
 166         return 512;
 167 }
 168
 169 int in_evdev_update(void *drv_data, int *binds)
 170 {
 171         struct input_event ev[16];
 172         int keybits[KEY_MAX/sizeof(int)];
 173         int fd = (int)drv_data;
 174         int result = 0, changed = 0;
 175         int rd, ret, u;
 176
 177         while (1) {
 178                 rd = read(fd, ev, sizeof(ev));
 179                 if (rd < (int)sizeof(ev[0])) {
 180                         if (errno != EAGAIN)
 181                                 perror("in_evdev: read failed");
 182                         break;
 183                 }
 184
 185                 changed = 1;
 186         }
 187
 188 /*
 189         if (!changed)
 190                 return 0;
 191 */
 192         ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits);
 193         if (ret == -1) {
 194                 perror("in_evdev: ioctl failed");
 195                 return 0;
 196         }
 197
 198         printf("#%d: ", fd);
 199         for (u = 0; u < KEY_MAX; u++) {
 200                 if (BIT(u)) {
 201                         printf(" %d", u);
 202                         result |= binds[u];
 203                 }
 204         }
 205         printf("\n");
 206
 207         return result;
 208 }
 209
 210 void in_evdev_set_blocking(void *data, int y)
 211 {
 212         long flags;
 213         int ret;
 214
 215         flags = (long)fcntl((int)data, F_GETFL);
 216         if ((int)flags == -1) {
 217                 perror("in_evdev: F_GETFL fcntl failed");
 218                 return;
 219         }
 220         if (y)
 221                 flags &= ~O_NONBLOCK;
 222         else
 223                 flags |=  O_NONBLOCK;
 224         ret = fcntl((int)data, F_SETFL, flags);
 225         if (ret == -1)
 226                 perror("in_evdev: F_SETFL fcntl failed");
 227 }
 228
 229 int in_evdev_update_keycode(void **data, int dcount, int *which, int *is_down)
 230 {
 231         const int *fds = (const int *)data;
 232         int i, fdmax = -1;
 233
 234         for (i = 0; i < dcount; i++)
 235                 if (fds[i] > fdmax) fdmax = fds[i];
 236
 237         while (1)
 238         {
 239                 struct input_event ev[64];
 240                 int ret, fd = -1, rd;
 241                 fd_set fdset;
 242
 243                 FD_ZERO(&fdset);
 244                 for (i = 0; i < dcount; i++)
 245                         FD_SET(fds[i], &fdset);
 246
 247                 ret = select(fdmax + 1, &fdset, NULL, NULL, NULL);
 248                 if (ret == -1)
 249                 {
 250                         perror("in_evdev: select failed");
 251                         sleep(1);
 252                         return 0;
 253                 }
 254
 255                 for (i = 0; i < dcount; i++)
 256                         if (FD_ISSET(fds[i], &fdset))
 257                                 *which = i, fd = fds[i];
 258
 259                 rd = read(fd, ev, sizeof(ev[0]) * 64);
 260                 if (rd < (int) sizeof(ev[0])) {
 261                         perror("in_evdev: error reading");
 262                         sleep(1);
 263                         return 0;
 264                 }
 265
 266                 for (i = 0; i < rd / sizeof(ev[0]); i++)
 267                 {
 268                         if (ev[i].type != EV_KEY || ev[i].value < 0 || ev[i].value > 1)
 269                                 continue;
 270
 271                         if (is_down)
 272                                 *is_down = ev[i].value;
 273                         return ev[i].code;
 274                 }
 275         }
 276 }
 277
 278 int in_evdev_menu_translate(int keycode)
 279 {
 280         switch (keycode) {
 281                 /* keyboards */
 282                 case KEY_UP:    return PBTN_UP;
 283                 case KEY_DOWN:  return PBTN_DOWN;
 284                 case KEY_LEFT:  return PBTN_LEFT;
 285                 case KEY_RIGHT: return PBTN_RIGHT;
 286                 case KEY_ENTER: return PBTN_EAST;
 287                 case KEY_ESC:   return PBTN_SOUTH;
 288                 default:        return 0;
 289         }
 290 }
 291
 292 const char *in_evdev_get_key_name(int keycode)
 293 {
 294         const char *name = NULL;
 295         if (keycode >= 0 && keycode < KEY_MAX)
 296                 name = in_evdev_keys[keycode];
 297         if (name == NULL)
 298                 name = "Unkn";
 299
 300         return name;
 301 }
 302