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; 172 173 QTAILQ_ENTRY(InputLinux) next; 174 }; 175 176 struct InputLinuxClass { 177 ObjectClass parent_class; 178 }; 179 180 static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs); 181 182 static void input_linux_toggle_grab(InputLinux *il) 183 { 184 intptr_t request = !il->grab_active; 185 InputLinux *item; 186 int rc; 187 188 rc = ioctl(il->fd, EVIOCGRAB, request); 189 if (rc < 0) { 190 return; 191 } 192 il->grab_active = !il->grab_active; 193 194 if (!il->grab_all) { 195 return; 196 } 197 QTAILQ_FOREACH(item, &inputs, next) { 198 if (item == il || item->grab_all) { 199 /* avoid endless loops */ 200 continue; 201 } 202 if (item->grab_active != il->grab_active) { 203 input_linux_toggle_grab(item); 204 } 205 } 206 } 207 208 static void input_linux_handle_keyboard(InputLinux *il, 209 struct input_event *event) 210 { 211 if (event->type == EV_KEY) { 212 if (event->value > 2 || (event->value > 1 && !il->repeat)) { 213 /* 214 * ignore autorepeat + unknown key events 215 * 0 == up, 1 == down, 2 == autorepeat, other == undefined 216 */ 217 return; 218 } 219 if (event->code >= KEY_CNT) { 220 /* 221 * Should not happen. But better safe than sorry, 222 * and we make Coverity happy too. 223 */ 224 return; 225 } 226 227 /* keep track of key state */ 228 if (!il->keydown[event->code] && event->value) { 229 il->keydown[event->code] = true; 230 il->keycount++; 231 } 232 if (il->keydown[event->code] && !event->value) { 233 il->keydown[event->code] = false; 234 il->keycount--; 235 } 236 237 /* send event to guest when grab is active */ 238 if (il->grab_active) { 239 int qcode = qemu_input_linux_to_qcode(event->code); 240 qemu_input_event_send_key_qcode(NULL, qcode, event->value); 241 } 242 243 /* hotkey -> record switch request ... */ 244 if (il->keydown[KEY_LEFTCTRL] && 245 il->keydown[KEY_RIGHTCTRL]) { 246 il->grab_request = true; 247 } 248 249 /* 250 * ... and do the switch when all keys are lifted, so we 251 * confuse neither guest nor host with keys which seem to 252 * be stuck due to missing key-up events. 253 */ 254 if (il->grab_request && !il->keycount) { 255 il->grab_request = false; 256 input_linux_toggle_grab(il); 257 } 258 } 259 } 260 261 static void input_linux_event_mouse_button(int button) 262 { 263 qemu_input_queue_btn(NULL, button, true); 264 qemu_input_event_sync(); 265 qemu_input_queue_btn(NULL, button, false); 266 qemu_input_event_sync(); 267 } 268 269 static void input_linux_handle_mouse(InputLinux *il, struct input_event *event) 270 { 271 if (!il->grab_active) { 272 return; 273 } 274 275 switch (event->type) { 276 case EV_KEY: 277 switch (event->code) { 278 case BTN_LEFT: 279 qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value); 280 break; 281 case BTN_RIGHT: 282 qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value); 283 break; 284 case BTN_MIDDLE: 285 qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value); 286 break; 287 case BTN_GEAR_UP: 288 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value); 289 break; 290 case BTN_GEAR_DOWN: 291 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN, 292 event->value); 293 break; 294 }; 295 break; 296 case EV_REL: 297 switch (event->code) { 298 case REL_X: 299 qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value); 300 break; 301 case REL_Y: 302 qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value); 303 break; 304 case REL_WHEEL: 305 il->wheel = event->value; 306 break; 307 } 308 break; 309 case EV_SYN: 310 qemu_input_event_sync(); 311 if (il->wheel != 0) { 312 input_linux_event_mouse_button((il->wheel > 0) 313 ? INPUT_BUTTON_WHEEL_UP 314 : INPUT_BUTTON_WHEEL_DOWN); 315 il->wheel = 0; 316 } 317 break; 318 } 319 } 320 321 static void input_linux_event(void *opaque) 322 { 323 InputLinux *il = opaque; 324 struct input_event event; 325 int rc; 326 327 for (;;) { 328 rc = read(il->fd, &event, sizeof(event)); 329 if (rc != sizeof(event)) { 330 if (rc < 0 && errno != EAGAIN) { 331 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); 332 qemu_set_fd_handler(il->fd, NULL, NULL, NULL); 333 close(il->fd); 334 } 335 break; 336 } 337 338 if (il->num_keys) { 339 input_linux_handle_keyboard(il, &event); 340 } 341 if (il->has_rel_x && il->num_btns) { 342 input_linux_handle_mouse(il, &event); 343 } 344 } 345 } 346 347 static void input_linux_complete(UserCreatable *uc, Error **errp) 348 { 349 InputLinux *il = INPUT_LINUX(uc); 350 uint8_t evtmap, relmap, absmap; 351 uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8]; 352 unsigned int i; 353 int rc, ver; 354 355 if (!il->evdev) { 356 error_setg(errp, "no input device specified"); 357 return; 358 } 359 360 il->fd = open(il->evdev, O_RDWR); 361 if (il->fd < 0) { 362 error_setg_file_open(errp, errno, il->evdev); 363 return; 364 } 365 qemu_set_nonblock(il->fd); 366 367 rc = ioctl(il->fd, EVIOCGVERSION, &ver); 368 if (rc < 0) { 369 error_setg(errp, "%s: is not an evdev device", il->evdev); 370 goto err_close; 371 } 372 373 rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); 374 if (rc < 0) { 375 error_setg(errp, "%s: failed to read event bits", il->evdev); 376 goto err_close; 377 } 378 379 if (evtmap & (1 << EV_REL)) { 380 relmap = 0; 381 rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap); 382 if (relmap & (1 << REL_X)) { 383 il->has_rel_x = true; 384 } 385 } 386 387 if (evtmap & (1 << EV_ABS)) { 388 absmap = 0; 389 rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap); 390 if (absmap & (1 << ABS_X)) { 391 il->has_abs_x = true; 392 } 393 } 394 395 if (evtmap & (1 << EV_KEY)) { 396 memset(keymap, 0, sizeof(keymap)); 397 rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap); 398 rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate); 399 for (i = 0; i < KEY_CNT; i++) { 400 if (keymap[i / 8] & (1 << (i % 8))) { 401 if (linux_is_button(i)) { 402 il->num_btns++; 403 } else { 404 il->num_keys++; 405 } 406 if (keystate[i / 8] & (1 << (i % 8))) { 407 il->keydown[i] = true; 408 il->keycount++; 409 } 410 } 411 } 412 } 413 414 qemu_set_fd_handler(il->fd, input_linux_event, NULL, il); 415 if (il->keycount) { 416 /* delay grab until all keys are released */ 417 il->grab_request = true; 418 } else { 419 input_linux_toggle_grab(il); 420 } 421 QTAILQ_INSERT_TAIL(&inputs, il, next); 422 il->initialized = true; 423 return; 424 425 err_close: 426 close(il->fd); 427 return; 428 } 429 430 static void input_linux_instance_finalize(Object *obj) 431 { 432 InputLinux *il = INPUT_LINUX(obj); 433 434 if (il->initialized) { 435 QTAILQ_REMOVE(&inputs, il, next); 436 close(il->fd); 437 } 438 g_free(il->evdev); 439 } 440 441 static char *input_linux_get_evdev(Object *obj, Error **errp) 442 { 443 InputLinux *il = INPUT_LINUX(obj); 444 445 return g_strdup(il->evdev); 446 } 447 448 static void input_linux_set_evdev(Object *obj, const char *value, 449 Error **errp) 450 { 451 InputLinux *il = INPUT_LINUX(obj); 452 453 if (il->evdev) { 454 error_setg(errp, "evdev property already set"); 455 return; 456 } 457 il->evdev = g_strdup(value); 458 } 459 460 static bool input_linux_get_grab_all(Object *obj, Error **errp) 461 { 462 InputLinux *il = INPUT_LINUX(obj); 463 464 return il->grab_all; 465 } 466 467 static void input_linux_set_grab_all(Object *obj, bool value, 468 Error **errp) 469 { 470 InputLinux *il = INPUT_LINUX(obj); 471 472 il->grab_all = value; 473 } 474 475 static bool input_linux_get_repeat(Object *obj, Error **errp) 476 { 477 InputLinux *il = INPUT_LINUX(obj); 478 479 return il->repeat; 480 } 481 482 static void input_linux_set_repeat(Object *obj, bool value, 483 Error **errp) 484 { 485 InputLinux *il = INPUT_LINUX(obj); 486 487 il->repeat = value; 488 } 489 490 static void input_linux_instance_init(Object *obj) 491 { 492 object_property_add_str(obj, "evdev", 493 input_linux_get_evdev, 494 input_linux_set_evdev, NULL); 495 object_property_add_bool(obj, "grab_all", 496 input_linux_get_grab_all, 497 input_linux_set_grab_all, NULL); 498 object_property_add_bool(obj, "repeat", 499 input_linux_get_repeat, 500 input_linux_set_repeat, NULL); 501 } 502 503 static void input_linux_class_init(ObjectClass *oc, void *data) 504 { 505 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); 506 507 ucc->complete = input_linux_complete; 508 } 509 510 static const TypeInfo input_linux_info = { 511 .name = TYPE_INPUT_LINUX, 512 .parent = TYPE_OBJECT, 513 .class_size = sizeof(InputLinuxClass), 514 .class_init = input_linux_class_init, 515 .instance_size = sizeof(InputLinux), 516 .instance_init = input_linux_instance_init, 517 .instance_finalize = input_linux_instance_finalize, 518 .interfaces = (InterfaceInfo[]) { 519 { TYPE_USER_CREATABLE }, 520 { } 521 } 522 }; 523 524 static void register_types(void) 525 { 526 type_register_static(&input_linux_info); 527 } 528 529 type_init(register_types); 530