1 /* 2 * This work is licensed under the terms of the GNU GPL, version 2 or 3 * (at your option) any later version. See the COPYING file in the 4 * top-level directory. 5 */ 6 7 #include "qemu/osdep.h" 8 #include "qapi/error.h" 9 #include "qemu-common.h" 10 #include "qemu/config-file.h" 11 #include "qemu/sockets.h" 12 #include "sysemu/sysemu.h" 13 #include "ui/input.h" 14 #include "qom/object_interfaces.h" 15 16 #include <sys/ioctl.h> 17 #include "standard-headers/linux/input.h" 18 19 static int linux_to_qcode[KEY_CNT] = { 20 [KEY_ESC] = Q_KEY_CODE_ESC, 21 [KEY_1] = Q_KEY_CODE_1, 22 [KEY_2] = Q_KEY_CODE_2, 23 [KEY_3] = Q_KEY_CODE_3, 24 [KEY_4] = Q_KEY_CODE_4, 25 [KEY_5] = Q_KEY_CODE_5, 26 [KEY_6] = Q_KEY_CODE_6, 27 [KEY_7] = Q_KEY_CODE_7, 28 [KEY_8] = Q_KEY_CODE_8, 29 [KEY_9] = Q_KEY_CODE_9, 30 [KEY_0] = Q_KEY_CODE_0, 31 [KEY_MINUS] = Q_KEY_CODE_MINUS, 32 [KEY_EQUAL] = Q_KEY_CODE_EQUAL, 33 [KEY_BACKSPACE] = Q_KEY_CODE_BACKSPACE, 34 [KEY_TAB] = Q_KEY_CODE_TAB, 35 [KEY_Q] = Q_KEY_CODE_Q, 36 [KEY_W] = Q_KEY_CODE_W, 37 [KEY_E] = Q_KEY_CODE_E, 38 [KEY_R] = Q_KEY_CODE_R, 39 [KEY_T] = Q_KEY_CODE_T, 40 [KEY_Y] = Q_KEY_CODE_Y, 41 [KEY_U] = Q_KEY_CODE_U, 42 [KEY_I] = Q_KEY_CODE_I, 43 [KEY_O] = Q_KEY_CODE_O, 44 [KEY_P] = Q_KEY_CODE_P, 45 [KEY_LEFTBRACE] = Q_KEY_CODE_BRACKET_LEFT, 46 [KEY_RIGHTBRACE] = Q_KEY_CODE_BRACKET_RIGHT, 47 [KEY_ENTER] = Q_KEY_CODE_RET, 48 [KEY_LEFTCTRL] = Q_KEY_CODE_CTRL, 49 [KEY_A] = Q_KEY_CODE_A, 50 [KEY_S] = Q_KEY_CODE_S, 51 [KEY_D] = Q_KEY_CODE_D, 52 [KEY_F] = Q_KEY_CODE_F, 53 [KEY_G] = Q_KEY_CODE_G, 54 [KEY_H] = Q_KEY_CODE_H, 55 [KEY_J] = Q_KEY_CODE_J, 56 [KEY_K] = Q_KEY_CODE_K, 57 [KEY_L] = Q_KEY_CODE_L, 58 [KEY_SEMICOLON] = Q_KEY_CODE_SEMICOLON, 59 [KEY_APOSTROPHE] = Q_KEY_CODE_APOSTROPHE, 60 [KEY_GRAVE] = Q_KEY_CODE_GRAVE_ACCENT, 61 [KEY_LEFTSHIFT] = Q_KEY_CODE_SHIFT, 62 [KEY_BACKSLASH] = Q_KEY_CODE_BACKSLASH, 63 [KEY_102ND] = Q_KEY_CODE_LESS, 64 [KEY_Z] = Q_KEY_CODE_Z, 65 [KEY_X] = Q_KEY_CODE_X, 66 [KEY_C] = Q_KEY_CODE_C, 67 [KEY_V] = Q_KEY_CODE_V, 68 [KEY_B] = Q_KEY_CODE_B, 69 [KEY_N] = Q_KEY_CODE_N, 70 [KEY_M] = Q_KEY_CODE_M, 71 [KEY_COMMA] = Q_KEY_CODE_COMMA, 72 [KEY_DOT] = Q_KEY_CODE_DOT, 73 [KEY_SLASH] = Q_KEY_CODE_SLASH, 74 [KEY_RIGHTSHIFT] = Q_KEY_CODE_SHIFT_R, 75 [KEY_LEFTALT] = Q_KEY_CODE_ALT, 76 [KEY_SPACE] = Q_KEY_CODE_SPC, 77 [KEY_CAPSLOCK] = Q_KEY_CODE_CAPS_LOCK, 78 [KEY_F1] = Q_KEY_CODE_F1, 79 [KEY_F2] = Q_KEY_CODE_F2, 80 [KEY_F3] = Q_KEY_CODE_F3, 81 [KEY_F4] = Q_KEY_CODE_F4, 82 [KEY_F5] = Q_KEY_CODE_F5, 83 [KEY_F6] = Q_KEY_CODE_F6, 84 [KEY_F7] = Q_KEY_CODE_F7, 85 [KEY_F8] = Q_KEY_CODE_F8, 86 [KEY_F9] = Q_KEY_CODE_F9, 87 [KEY_F10] = Q_KEY_CODE_F10, 88 [KEY_NUMLOCK] = Q_KEY_CODE_NUM_LOCK, 89 [KEY_SCROLLLOCK] = Q_KEY_CODE_SCROLL_LOCK, 90 [KEY_KP0] = Q_KEY_CODE_KP_0, 91 [KEY_KP1] = Q_KEY_CODE_KP_1, 92 [KEY_KP2] = Q_KEY_CODE_KP_2, 93 [KEY_KP3] = Q_KEY_CODE_KP_3, 94 [KEY_KP4] = Q_KEY_CODE_KP_4, 95 [KEY_KP5] = Q_KEY_CODE_KP_5, 96 [KEY_KP6] = Q_KEY_CODE_KP_6, 97 [KEY_KP7] = Q_KEY_CODE_KP_7, 98 [KEY_KP8] = Q_KEY_CODE_KP_8, 99 [KEY_KP9] = Q_KEY_CODE_KP_9, 100 [KEY_KPMINUS] = Q_KEY_CODE_KP_SUBTRACT, 101 [KEY_KPPLUS] = Q_KEY_CODE_KP_ADD, 102 [KEY_KPDOT] = Q_KEY_CODE_KP_DECIMAL, 103 [KEY_KPENTER] = Q_KEY_CODE_KP_ENTER, 104 [KEY_KPSLASH] = Q_KEY_CODE_KP_DIVIDE, 105 [KEY_KPASTERISK] = Q_KEY_CODE_KP_MULTIPLY, 106 [KEY_F11] = Q_KEY_CODE_F11, 107 [KEY_F12] = Q_KEY_CODE_F12, 108 [KEY_RIGHTCTRL] = Q_KEY_CODE_CTRL_R, 109 [KEY_SYSRQ] = Q_KEY_CODE_SYSRQ, 110 [KEY_RIGHTALT] = Q_KEY_CODE_ALT_R, 111 [KEY_HOME] = Q_KEY_CODE_HOME, 112 [KEY_UP] = Q_KEY_CODE_UP, 113 [KEY_PAGEUP] = Q_KEY_CODE_PGUP, 114 [KEY_LEFT] = Q_KEY_CODE_LEFT, 115 [KEY_RIGHT] = Q_KEY_CODE_RIGHT, 116 [KEY_END] = Q_KEY_CODE_END, 117 [KEY_DOWN] = Q_KEY_CODE_DOWN, 118 [KEY_PAGEDOWN] = Q_KEY_CODE_PGDN, 119 [KEY_INSERT] = Q_KEY_CODE_INSERT, 120 [KEY_DELETE] = Q_KEY_CODE_DELETE, 121 [KEY_LEFTMETA] = Q_KEY_CODE_META_L, 122 [KEY_RIGHTMETA] = Q_KEY_CODE_META_R, 123 [KEY_MENU] = Q_KEY_CODE_MENU, 124 }; 125 126 static int qemu_input_linux_to_qcode(unsigned int lnx) 127 { 128 assert(lnx < KEY_CNT); 129 return linux_to_qcode[lnx]; 130 } 131 132 static bool linux_is_button(unsigned int lnx) 133 { 134 if (lnx < 0x100) { 135 return false; 136 } 137 if (lnx >= 0x160 && lnx < 0x2c0) { 138 return false; 139 } 140 return true; 141 } 142 143 #define TYPE_INPUT_LINUX "input-linux" 144 #define INPUT_LINUX(obj) \ 145 OBJECT_CHECK(InputLinux, (obj), TYPE_INPUT_LINUX) 146 #define INPUT_LINUX_GET_CLASS(obj) \ 147 OBJECT_GET_CLASS(InputLinuxClass, (obj), TYPE_INPUT_LINUX) 148 #define INPUT_LINUX_CLASS(klass) \ 149 OBJECT_CLASS_CHECK(InputLinuxClass, (klass), TYPE_INPUT_LINUX) 150 151 typedef struct InputLinux InputLinux; 152 typedef struct InputLinuxClass InputLinuxClass; 153 154 struct InputLinux { 155 Object parent; 156 157 char *evdev; 158 int fd; 159 bool repeat; 160 bool grab_request; 161 bool grab_active; 162 bool grab_all; 163 bool keydown[KEY_CNT]; 164 int keycount; 165 int wheel; 166 bool initialized; 167 168 bool has_rel_x; 169 bool has_abs_x; 170 int num_keys; 171 int num_btns; 172 struct input_event event; 173 int read_offset; 174 175 QTAILQ_ENTRY(InputLinux) next; 176 }; 177 178 struct InputLinuxClass { 179 ObjectClass parent_class; 180 }; 181 182 static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs); 183 184 static void input_linux_toggle_grab(InputLinux *il) 185 { 186 intptr_t request = !il->grab_active; 187 InputLinux *item; 188 int rc; 189 190 rc = ioctl(il->fd, EVIOCGRAB, request); 191 if (rc < 0) { 192 return; 193 } 194 il->grab_active = !il->grab_active; 195 196 if (!il->grab_all) { 197 return; 198 } 199 QTAILQ_FOREACH(item, &inputs, next) { 200 if (item == il || item->grab_all) { 201 /* avoid endless loops */ 202 continue; 203 } 204 if (item->grab_active != il->grab_active) { 205 input_linux_toggle_grab(item); 206 } 207 } 208 } 209 210 static void input_linux_handle_keyboard(InputLinux *il, 211 struct input_event *event) 212 { 213 if (event->type == EV_KEY) { 214 if (event->value > 2 || (event->value > 1 && !il->repeat)) { 215 /* 216 * ignore autorepeat + unknown key events 217 * 0 == up, 1 == down, 2 == autorepeat, other == undefined 218 */ 219 return; 220 } 221 if (event->code >= KEY_CNT) { 222 /* 223 * Should not happen. But better safe than sorry, 224 * and we make Coverity happy too. 225 */ 226 return; 227 } 228 229 /* keep track of key state */ 230 if (!il->keydown[event->code] && event->value) { 231 il->keydown[event->code] = true; 232 il->keycount++; 233 } 234 if (il->keydown[event->code] && !event->value) { 235 il->keydown[event->code] = false; 236 il->keycount--; 237 } 238 239 /* send event to guest when grab is active */ 240 if (il->grab_active) { 241 int qcode = qemu_input_linux_to_qcode(event->code); 242 qemu_input_event_send_key_qcode(NULL, qcode, event->value); 243 } 244 245 /* hotkey -> record switch request ... */ 246 if (il->keydown[KEY_LEFTCTRL] && 247 il->keydown[KEY_RIGHTCTRL]) { 248 il->grab_request = true; 249 } 250 251 /* 252 * ... and do the switch when all keys are lifted, so we 253 * confuse neither guest nor host with keys which seem to 254 * be stuck due to missing key-up events. 255 */ 256 if (il->grab_request && !il->keycount) { 257 il->grab_request = false; 258 input_linux_toggle_grab(il); 259 } 260 } 261 } 262 263 static void input_linux_event_mouse_button(int button) 264 { 265 qemu_input_queue_btn(NULL, button, true); 266 qemu_input_event_sync(); 267 qemu_input_queue_btn(NULL, button, false); 268 qemu_input_event_sync(); 269 } 270 271 static void input_linux_handle_mouse(InputLinux *il, struct input_event *event) 272 { 273 if (!il->grab_active) { 274 return; 275 } 276 277 switch (event->type) { 278 case EV_KEY: 279 switch (event->code) { 280 case BTN_LEFT: 281 qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value); 282 break; 283 case BTN_RIGHT: 284 qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value); 285 break; 286 case BTN_MIDDLE: 287 qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value); 288 break; 289 case BTN_GEAR_UP: 290 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value); 291 break; 292 case BTN_GEAR_DOWN: 293 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN, 294 event->value); 295 break; 296 case BTN_SIDE: 297 qemu_input_queue_btn(NULL, INPUT_BUTTON_SIDE, event->value); 298 break; 299 case BTN_EXTRA: 300 qemu_input_queue_btn(NULL, INPUT_BUTTON_EXTRA, event->value); 301 break; 302 }; 303 break; 304 case EV_REL: 305 switch (event->code) { 306 case REL_X: 307 qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value); 308 break; 309 case REL_Y: 310 qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value); 311 break; 312 case REL_WHEEL: 313 il->wheel = event->value; 314 break; 315 } 316 break; 317 case EV_SYN: 318 qemu_input_event_sync(); 319 if (il->wheel != 0) { 320 input_linux_event_mouse_button((il->wheel > 0) 321 ? INPUT_BUTTON_WHEEL_UP 322 : INPUT_BUTTON_WHEEL_DOWN); 323 il->wheel = 0; 324 } 325 break; 326 } 327 } 328 329 static void input_linux_event(void *opaque) 330 { 331 InputLinux *il = opaque; 332 int rc; 333 int read_size; 334 uint8_t *p = (uint8_t *)&il->event; 335 336 for (;;) { 337 read_size = sizeof(il->event) - il->read_offset; 338 rc = read(il->fd, &p[il->read_offset], read_size); 339 if (rc != read_size) { 340 if (rc < 0 && errno != EAGAIN) { 341 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); 342 qemu_set_fd_handler(il->fd, NULL, NULL, NULL); 343 close(il->fd); 344 } else if (rc > 0) { 345 il->read_offset += rc; 346 } 347 break; 348 } 349 il->read_offset = 0; 350 351 if (il->num_keys) { 352 input_linux_handle_keyboard(il, &il->event); 353 } 354 if (il->has_rel_x && il->num_btns) { 355 input_linux_handle_mouse(il, &il->event); 356 } 357 } 358 } 359 360 static void input_linux_complete(UserCreatable *uc, Error **errp) 361 { 362 InputLinux *il = INPUT_LINUX(uc); 363 uint8_t evtmap, relmap, absmap; 364 uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8]; 365 unsigned int i; 366 int rc, ver; 367 368 if (!il->evdev) { 369 error_setg(errp, "no input device specified"); 370 return; 371 } 372 373 il->fd = open(il->evdev, O_RDWR); 374 if (il->fd < 0) { 375 error_setg_file_open(errp, errno, il->evdev); 376 return; 377 } 378 qemu_set_nonblock(il->fd); 379 380 rc = ioctl(il->fd, EVIOCGVERSION, &ver); 381 if (rc < 0) { 382 error_setg(errp, "%s: is not an evdev device", il->evdev); 383 goto err_close; 384 } 385 386 rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); 387 if (rc < 0) { 388 error_setg(errp, "%s: failed to read event bits", il->evdev); 389 goto err_close; 390 } 391 392 if (evtmap & (1 << EV_REL)) { 393 relmap = 0; 394 rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap); 395 if (relmap & (1 << REL_X)) { 396 il->has_rel_x = true; 397 } 398 } 399 400 if (evtmap & (1 << EV_ABS)) { 401 absmap = 0; 402 rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap); 403 if (absmap & (1 << ABS_X)) { 404 il->has_abs_x = true; 405 } 406 } 407 408 if (evtmap & (1 << EV_KEY)) { 409 memset(keymap, 0, sizeof(keymap)); 410 rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap); 411 rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate); 412 for (i = 0; i < KEY_CNT; i++) { 413 if (keymap[i / 8] & (1 << (i % 8))) { 414 if (linux_is_button(i)) { 415 il->num_btns++; 416 } else { 417 il->num_keys++; 418 } 419 if (keystate[i / 8] & (1 << (i % 8))) { 420 il->keydown[i] = true; 421 il->keycount++; 422 } 423 } 424 } 425 } 426 427 qemu_set_fd_handler(il->fd, input_linux_event, NULL, il); 428 if (il->keycount) { 429 /* delay grab until all keys are released */ 430 il->grab_request = true; 431 } else { 432 input_linux_toggle_grab(il); 433 } 434 QTAILQ_INSERT_TAIL(&inputs, il, next); 435 il->initialized = true; 436 return; 437 438 err_close: 439 close(il->fd); 440 return; 441 } 442 443 static void input_linux_instance_finalize(Object *obj) 444 { 445 InputLinux *il = INPUT_LINUX(obj); 446 447 if (il->initialized) { 448 QTAILQ_REMOVE(&inputs, il, next); 449 close(il->fd); 450 } 451 g_free(il->evdev); 452 } 453 454 static char *input_linux_get_evdev(Object *obj, Error **errp) 455 { 456 InputLinux *il = INPUT_LINUX(obj); 457 458 return g_strdup(il->evdev); 459 } 460 461 static void input_linux_set_evdev(Object *obj, const char *value, 462 Error **errp) 463 { 464 InputLinux *il = INPUT_LINUX(obj); 465 466 if (il->evdev) { 467 error_setg(errp, "evdev property already set"); 468 return; 469 } 470 il->evdev = g_strdup(value); 471 } 472 473 static bool input_linux_get_grab_all(Object *obj, Error **errp) 474 { 475 InputLinux *il = INPUT_LINUX(obj); 476 477 return il->grab_all; 478 } 479 480 static void input_linux_set_grab_all(Object *obj, bool value, 481 Error **errp) 482 { 483 InputLinux *il = INPUT_LINUX(obj); 484 485 il->grab_all = value; 486 } 487 488 static bool input_linux_get_repeat(Object *obj, Error **errp) 489 { 490 InputLinux *il = INPUT_LINUX(obj); 491 492 return il->repeat; 493 } 494 495 static void input_linux_set_repeat(Object *obj, bool value, 496 Error **errp) 497 { 498 InputLinux *il = INPUT_LINUX(obj); 499 500 il->repeat = value; 501 } 502 503 static void input_linux_instance_init(Object *obj) 504 { 505 object_property_add_str(obj, "evdev", 506 input_linux_get_evdev, 507 input_linux_set_evdev, NULL); 508 object_property_add_bool(obj, "grab_all", 509 input_linux_get_grab_all, 510 input_linux_set_grab_all, NULL); 511 object_property_add_bool(obj, "repeat", 512 input_linux_get_repeat, 513 input_linux_set_repeat, NULL); 514 } 515 516 static void input_linux_class_init(ObjectClass *oc, void *data) 517 { 518 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); 519 520 ucc->complete = input_linux_complete; 521 } 522 523 static const TypeInfo input_linux_info = { 524 .name = TYPE_INPUT_LINUX, 525 .parent = TYPE_OBJECT, 526 .class_size = sizeof(InputLinuxClass), 527 .class_init = input_linux_class_init, 528 .instance_size = sizeof(InputLinux), 529 .instance_init = input_linux_instance_init, 530 .instance_finalize = input_linux_instance_finalize, 531 .interfaces = (InterfaceInfo[]) { 532 { TYPE_USER_CREATABLE }, 533 { } 534 } 535 }; 536 537 static void register_types(void) 538 { 539 type_register_static(&input_linux_info); 540 } 541 542 type_init(register_types); 543