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 #define TYPE_INPUT_LINUX "input-linux" 133 #define INPUT_LINUX(obj) \ 134 OBJECT_CHECK(InputLinux, (obj), TYPE_INPUT_LINUX) 135 #define INPUT_LINUX_GET_CLASS(obj) \ 136 OBJECT_GET_CLASS(InputLinuxClass, (obj), TYPE_INPUT_LINUX) 137 #define INPUT_LINUX_CLASS(klass) \ 138 OBJECT_CLASS_CHECK(InputLinuxClass, (klass), TYPE_INPUT_LINUX) 139 140 typedef struct InputLinux InputLinux; 141 typedef struct InputLinuxClass InputLinuxClass; 142 143 struct InputLinux { 144 Object parent; 145 146 char *evdev; 147 int fd; 148 bool repeat; 149 bool grab_request; 150 bool grab_active; 151 bool grab_all; 152 bool keydown[KEY_CNT]; 153 int keycount; 154 int wheel; 155 bool initialized; 156 QTAILQ_ENTRY(InputLinux) next; 157 }; 158 159 struct InputLinuxClass { 160 ObjectClass parent_class; 161 }; 162 163 static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs); 164 165 static void input_linux_toggle_grab(InputLinux *il) 166 { 167 intptr_t request = !il->grab_active; 168 InputLinux *item; 169 int rc; 170 171 rc = ioctl(il->fd, EVIOCGRAB, request); 172 if (rc < 0) { 173 return; 174 } 175 il->grab_active = !il->grab_active; 176 177 if (!il->grab_all) { 178 return; 179 } 180 QTAILQ_FOREACH(item, &inputs, next) { 181 if (item == il || item->grab_all) { 182 /* avoid endless loops */ 183 continue; 184 } 185 if (item->grab_active != il->grab_active) { 186 input_linux_toggle_grab(item); 187 } 188 } 189 } 190 191 static void input_linux_handle_keyboard(InputLinux *il, 192 struct input_event *event) 193 { 194 if (event->type == EV_KEY) { 195 if (event->value > 2 || (event->value > 1 && !il->repeat)) { 196 /* 197 * ignore autorepeat + unknown key events 198 * 0 == up, 1 == down, 2 == autorepeat, other == undefined 199 */ 200 return; 201 } 202 if (event->code >= KEY_CNT) { 203 /* 204 * Should not happen. But better safe than sorry, 205 * and we make Coverity happy too. 206 */ 207 return; 208 } 209 210 /* keep track of key state */ 211 if (!il->keydown[event->code] && event->value) { 212 il->keydown[event->code] = true; 213 il->keycount++; 214 } 215 if (il->keydown[event->code] && !event->value) { 216 il->keydown[event->code] = false; 217 il->keycount--; 218 } 219 220 /* send event to guest when grab is active */ 221 if (il->grab_active) { 222 int qcode = qemu_input_linux_to_qcode(event->code); 223 qemu_input_event_send_key_qcode(NULL, qcode, event->value); 224 } 225 226 /* hotkey -> record switch request ... */ 227 if (il->keydown[KEY_LEFTCTRL] && 228 il->keydown[KEY_RIGHTCTRL]) { 229 il->grab_request = true; 230 } 231 232 /* 233 * ... and do the switch when all keys are lifted, so we 234 * confuse neither guest nor host with keys which seem to 235 * be stuck due to missing key-up events. 236 */ 237 if (il->grab_request && !il->keycount) { 238 il->grab_request = false; 239 input_linux_toggle_grab(il); 240 } 241 } 242 } 243 244 static void input_linux_event_keyboard(void *opaque) 245 { 246 InputLinux *il = opaque; 247 struct input_event event; 248 int rc; 249 250 for (;;) { 251 rc = read(il->fd, &event, sizeof(event)); 252 if (rc != sizeof(event)) { 253 if (rc < 0 && errno != EAGAIN) { 254 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); 255 qemu_set_fd_handler(il->fd, NULL, NULL, NULL); 256 close(il->fd); 257 } 258 break; 259 } 260 261 input_linux_handle_keyboard(il, &event); 262 } 263 } 264 265 static void input_linux_event_mouse_button(int button) 266 { 267 qemu_input_queue_btn(NULL, button, true); 268 qemu_input_event_sync(); 269 qemu_input_queue_btn(NULL, button, false); 270 qemu_input_event_sync(); 271 } 272 273 static void input_linux_handle_mouse(InputLinux *il, struct input_event *event) 274 { 275 if (!il->grab_active) { 276 return; 277 } 278 279 switch (event->type) { 280 case EV_KEY: 281 switch (event->code) { 282 case BTN_LEFT: 283 qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value); 284 break; 285 case BTN_RIGHT: 286 qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value); 287 break; 288 case BTN_MIDDLE: 289 qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value); 290 break; 291 case BTN_GEAR_UP: 292 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value); 293 break; 294 case BTN_GEAR_DOWN: 295 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN, 296 event->value); 297 break; 298 }; 299 break; 300 case EV_REL: 301 switch (event->code) { 302 case REL_X: 303 qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value); 304 break; 305 case REL_Y: 306 qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value); 307 break; 308 case REL_WHEEL: 309 il->wheel = event->value; 310 break; 311 } 312 break; 313 case EV_SYN: 314 qemu_input_event_sync(); 315 if (il->wheel != 0) { 316 input_linux_event_mouse_button((il->wheel > 0) 317 ? INPUT_BUTTON_WHEEL_UP 318 : INPUT_BUTTON_WHEEL_DOWN); 319 il->wheel = 0; 320 } 321 break; 322 } 323 } 324 325 static void input_linux_event_mouse(void *opaque) 326 { 327 InputLinux *il = opaque; 328 struct input_event event; 329 int rc; 330 331 for (;;) { 332 rc = read(il->fd, &event, sizeof(event)); 333 if (rc != sizeof(event)) { 334 if (rc < 0 && errno != EAGAIN) { 335 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); 336 qemu_set_fd_handler(il->fd, NULL, NULL, NULL); 337 close(il->fd); 338 } 339 break; 340 } 341 342 input_linux_handle_mouse(il, &event); 343 } 344 } 345 346 static void input_linux_complete(UserCreatable *uc, Error **errp) 347 { 348 InputLinux *il = INPUT_LINUX(uc); 349 uint32_t evtmap, relmap, absmap; 350 int rc, ver; 351 352 if (!il->evdev) { 353 error_setg(errp, "no input device specified"); 354 return; 355 } 356 357 il->fd = open(il->evdev, O_RDWR); 358 if (il->fd < 0) { 359 error_setg_file_open(errp, errno, il->evdev); 360 return; 361 } 362 qemu_set_nonblock(il->fd); 363 364 rc = ioctl(il->fd, EVIOCGVERSION, &ver); 365 if (rc < 0) { 366 error_setg(errp, "%s: is not an evdev device", il->evdev); 367 goto err_close; 368 } 369 370 rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); 371 if (rc < 0) { 372 error_setg(errp, "%s: failed to read event bits", il->evdev); 373 goto err_close; 374 } 375 376 if (evtmap & (1 << EV_REL)) { 377 rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap); 378 if (rc < 0) { 379 relmap = 0; 380 } 381 } 382 383 if (evtmap & (1 << EV_ABS)) { 384 ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap); 385 if (rc < 0) { 386 absmap = 0; 387 } 388 } 389 390 if ((evtmap & (1 << EV_REL)) && 391 (relmap & (1 << REL_X))) { 392 /* has relative x axis -> assume mouse */ 393 qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il); 394 } else if ((evtmap & (1 << EV_ABS)) && 395 (absmap & (1 << ABS_X))) { 396 /* has absolute x axis -> not supported */ 397 error_setg(errp, "tablet/touchscreen not supported"); 398 goto err_close; 399 } else if (evtmap & (1 << EV_KEY)) { 400 /* has keys/buttons (and no x axis) -> assume keyboard */ 401 qemu_set_fd_handler(il->fd, input_linux_event_keyboard, NULL, il); 402 } else { 403 /* Huh? What is this? */ 404 error_setg(errp, "unknown kind of input device"); 405 goto err_close; 406 } 407 input_linux_toggle_grab(il); 408 QTAILQ_INSERT_TAIL(&inputs, il, next); 409 il->initialized = true; 410 return; 411 412 err_close: 413 close(il->fd); 414 return; 415 } 416 417 static void input_linux_instance_finalize(Object *obj) 418 { 419 InputLinux *il = INPUT_LINUX(obj); 420 421 if (il->initialized) { 422 QTAILQ_REMOVE(&inputs, il, next); 423 close(il->fd); 424 } 425 g_free(il->evdev); 426 } 427 428 static char *input_linux_get_evdev(Object *obj, Error **errp) 429 { 430 InputLinux *il = INPUT_LINUX(obj); 431 432 return g_strdup(il->evdev); 433 } 434 435 static void input_linux_set_evdev(Object *obj, const char *value, 436 Error **errp) 437 { 438 InputLinux *il = INPUT_LINUX(obj); 439 440 if (il->evdev) { 441 error_setg(errp, "evdev property already set"); 442 return; 443 } 444 il->evdev = g_strdup(value); 445 } 446 447 static bool input_linux_get_grab_all(Object *obj, Error **errp) 448 { 449 InputLinux *il = INPUT_LINUX(obj); 450 451 return il->grab_all; 452 } 453 454 static void input_linux_set_grab_all(Object *obj, bool value, 455 Error **errp) 456 { 457 InputLinux *il = INPUT_LINUX(obj); 458 459 il->grab_all = value; 460 } 461 462 static bool input_linux_get_repeat(Object *obj, Error **errp) 463 { 464 InputLinux *il = INPUT_LINUX(obj); 465 466 return il->repeat; 467 } 468 469 static void input_linux_set_repeat(Object *obj, bool value, 470 Error **errp) 471 { 472 InputLinux *il = INPUT_LINUX(obj); 473 474 il->repeat = value; 475 } 476 477 static void input_linux_instance_init(Object *obj) 478 { 479 object_property_add_str(obj, "evdev", 480 input_linux_get_evdev, 481 input_linux_set_evdev, NULL); 482 object_property_add_bool(obj, "grab_all", 483 input_linux_get_grab_all, 484 input_linux_set_grab_all, NULL); 485 object_property_add_bool(obj, "repeat", 486 input_linux_get_repeat, 487 input_linux_set_repeat, NULL); 488 } 489 490 static void input_linux_class_init(ObjectClass *oc, void *data) 491 { 492 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); 493 494 ucc->complete = input_linux_complete; 495 } 496 497 static const TypeInfo input_linux_info = { 498 .name = TYPE_INPUT_LINUX, 499 .parent = TYPE_OBJECT, 500 .class_size = sizeof(InputLinuxClass), 501 .class_init = input_linux_class_init, 502 .instance_size = sizeof(InputLinux), 503 .instance_init = input_linux_instance_init, 504 .instance_finalize = input_linux_instance_finalize, 505 .interfaces = (InterfaceInfo[]) { 506 { TYPE_USER_CREATABLE }, 507 { } 508 } 509 }; 510 511 static void register_types(void) 512 { 513 type_register_static(&input_linux_info); 514 } 515 516 type_init(register_types); 517