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