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