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 15 #include <sys/ioctl.h> 16 #include "standard-headers/linux/input.h" 17 18 static int linux_to_qcode[KEY_CNT] = { 19 [KEY_ESC] = Q_KEY_CODE_ESC, 20 [KEY_1] = Q_KEY_CODE_1, 21 [KEY_2] = Q_KEY_CODE_2, 22 [KEY_3] = Q_KEY_CODE_3, 23 [KEY_4] = Q_KEY_CODE_4, 24 [KEY_5] = Q_KEY_CODE_5, 25 [KEY_6] = Q_KEY_CODE_6, 26 [KEY_7] = Q_KEY_CODE_7, 27 [KEY_8] = Q_KEY_CODE_8, 28 [KEY_9] = Q_KEY_CODE_9, 29 [KEY_0] = Q_KEY_CODE_0, 30 [KEY_MINUS] = Q_KEY_CODE_MINUS, 31 [KEY_EQUAL] = Q_KEY_CODE_EQUAL, 32 [KEY_BACKSPACE] = Q_KEY_CODE_BACKSPACE, 33 [KEY_TAB] = Q_KEY_CODE_TAB, 34 [KEY_Q] = Q_KEY_CODE_Q, 35 [KEY_W] = Q_KEY_CODE_W, 36 [KEY_E] = Q_KEY_CODE_E, 37 [KEY_R] = Q_KEY_CODE_R, 38 [KEY_T] = Q_KEY_CODE_T, 39 [KEY_Y] = Q_KEY_CODE_Y, 40 [KEY_U] = Q_KEY_CODE_U, 41 [KEY_I] = Q_KEY_CODE_I, 42 [KEY_O] = Q_KEY_CODE_O, 43 [KEY_P] = Q_KEY_CODE_P, 44 [KEY_LEFTBRACE] = Q_KEY_CODE_BRACKET_LEFT, 45 [KEY_RIGHTBRACE] = Q_KEY_CODE_BRACKET_RIGHT, 46 [KEY_ENTER] = Q_KEY_CODE_RET, 47 [KEY_LEFTCTRL] = Q_KEY_CODE_CTRL, 48 [KEY_A] = Q_KEY_CODE_A, 49 [KEY_S] = Q_KEY_CODE_S, 50 [KEY_D] = Q_KEY_CODE_D, 51 [KEY_F] = Q_KEY_CODE_F, 52 [KEY_G] = Q_KEY_CODE_G, 53 [KEY_H] = Q_KEY_CODE_H, 54 [KEY_J] = Q_KEY_CODE_J, 55 [KEY_K] = Q_KEY_CODE_K, 56 [KEY_L] = Q_KEY_CODE_L, 57 [KEY_SEMICOLON] = Q_KEY_CODE_SEMICOLON, 58 [KEY_APOSTROPHE] = Q_KEY_CODE_APOSTROPHE, 59 [KEY_GRAVE] = Q_KEY_CODE_GRAVE_ACCENT, 60 [KEY_LEFTSHIFT] = Q_KEY_CODE_SHIFT, 61 [KEY_BACKSLASH] = Q_KEY_CODE_BACKSLASH, 62 [KEY_102ND] = Q_KEY_CODE_LESS, 63 [KEY_Z] = Q_KEY_CODE_Z, 64 [KEY_X] = Q_KEY_CODE_X, 65 [KEY_C] = Q_KEY_CODE_C, 66 [KEY_V] = Q_KEY_CODE_V, 67 [KEY_B] = Q_KEY_CODE_B, 68 [KEY_N] = Q_KEY_CODE_N, 69 [KEY_M] = Q_KEY_CODE_M, 70 [KEY_COMMA] = Q_KEY_CODE_COMMA, 71 [KEY_DOT] = Q_KEY_CODE_DOT, 72 [KEY_SLASH] = Q_KEY_CODE_SLASH, 73 [KEY_RIGHTSHIFT] = Q_KEY_CODE_SHIFT_R, 74 [KEY_LEFTALT] = Q_KEY_CODE_ALT, 75 [KEY_SPACE] = Q_KEY_CODE_SPC, 76 [KEY_CAPSLOCK] = Q_KEY_CODE_CAPS_LOCK, 77 [KEY_F1] = Q_KEY_CODE_F1, 78 [KEY_F2] = Q_KEY_CODE_F2, 79 [KEY_F3] = Q_KEY_CODE_F3, 80 [KEY_F4] = Q_KEY_CODE_F4, 81 [KEY_F5] = Q_KEY_CODE_F5, 82 [KEY_F6] = Q_KEY_CODE_F6, 83 [KEY_F7] = Q_KEY_CODE_F7, 84 [KEY_F8] = Q_KEY_CODE_F8, 85 [KEY_F9] = Q_KEY_CODE_F9, 86 [KEY_F10] = Q_KEY_CODE_F10, 87 [KEY_NUMLOCK] = Q_KEY_CODE_NUM_LOCK, 88 [KEY_SCROLLLOCK] = Q_KEY_CODE_SCROLL_LOCK, 89 [KEY_KP0] = Q_KEY_CODE_KP_0, 90 [KEY_KP1] = Q_KEY_CODE_KP_1, 91 [KEY_KP2] = Q_KEY_CODE_KP_2, 92 [KEY_KP3] = Q_KEY_CODE_KP_3, 93 [KEY_KP4] = Q_KEY_CODE_KP_4, 94 [KEY_KP5] = Q_KEY_CODE_KP_5, 95 [KEY_KP6] = Q_KEY_CODE_KP_6, 96 [KEY_KP7] = Q_KEY_CODE_KP_7, 97 [KEY_KP8] = Q_KEY_CODE_KP_8, 98 [KEY_KP9] = Q_KEY_CODE_KP_9, 99 [KEY_KPMINUS] = Q_KEY_CODE_KP_SUBTRACT, 100 [KEY_KPPLUS] = Q_KEY_CODE_KP_ADD, 101 [KEY_KPDOT] = Q_KEY_CODE_KP_DECIMAL, 102 [KEY_KPENTER] = Q_KEY_CODE_KP_ENTER, 103 [KEY_KPSLASH] = Q_KEY_CODE_KP_DIVIDE, 104 [KEY_KPASTERISK] = Q_KEY_CODE_KP_MULTIPLY, 105 [KEY_F11] = Q_KEY_CODE_F11, 106 [KEY_F12] = Q_KEY_CODE_F12, 107 [KEY_RIGHTCTRL] = Q_KEY_CODE_CTRL_R, 108 [KEY_SYSRQ] = Q_KEY_CODE_SYSRQ, 109 [KEY_RIGHTALT] = Q_KEY_CODE_ALT_R, 110 [KEY_HOME] = Q_KEY_CODE_HOME, 111 [KEY_UP] = Q_KEY_CODE_UP, 112 [KEY_PAGEUP] = Q_KEY_CODE_PGUP, 113 [KEY_LEFT] = Q_KEY_CODE_LEFT, 114 [KEY_RIGHT] = Q_KEY_CODE_RIGHT, 115 [KEY_END] = Q_KEY_CODE_END, 116 [KEY_DOWN] = Q_KEY_CODE_DOWN, 117 [KEY_PAGEDOWN] = Q_KEY_CODE_PGDN, 118 [KEY_INSERT] = Q_KEY_CODE_INSERT, 119 [KEY_DELETE] = Q_KEY_CODE_DELETE, 120 [KEY_LEFTMETA] = Q_KEY_CODE_META_L, 121 [KEY_RIGHTMETA] = Q_KEY_CODE_META_R, 122 [KEY_MENU] = Q_KEY_CODE_MENU, 123 }; 124 125 static int qemu_input_linux_to_qcode(unsigned int lnx) 126 { 127 assert(lnx < KEY_CNT); 128 return linux_to_qcode[lnx]; 129 } 130 131 typedef struct InputLinux InputLinux; 132 133 struct InputLinux { 134 const char *evdev; 135 int fd; 136 bool repeat; 137 bool grab_request; 138 bool grab_active; 139 bool grab_all; 140 bool keydown[KEY_CNT]; 141 int keycount; 142 int wheel; 143 QTAILQ_ENTRY(InputLinux) next; 144 }; 145 146 static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs); 147 148 static void input_linux_toggle_grab(InputLinux *il) 149 { 150 intptr_t request = !il->grab_active; 151 InputLinux *item; 152 int rc; 153 154 rc = ioctl(il->fd, EVIOCGRAB, request); 155 if (rc < 0) { 156 return; 157 } 158 il->grab_active = !il->grab_active; 159 160 if (!il->grab_all) { 161 return; 162 } 163 QTAILQ_FOREACH(item, &inputs, next) { 164 if (item == il || item->grab_all) { 165 /* avoid endless loops */ 166 continue; 167 } 168 if (item->grab_active != il->grab_active) { 169 input_linux_toggle_grab(item); 170 } 171 } 172 } 173 174 static void input_linux_event_keyboard(void *opaque) 175 { 176 InputLinux *il = opaque; 177 struct input_event event; 178 int rc; 179 180 for (;;) { 181 rc = read(il->fd, &event, sizeof(event)); 182 if (rc != sizeof(event)) { 183 if (rc < 0 && errno != EAGAIN) { 184 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno)); 185 qemu_set_fd_handler(il->fd, NULL, NULL, NULL); 186 close(il->fd); 187 } 188 break; 189 } 190 191 switch (event.type) { 192 case EV_KEY: 193 if (event.value > 2 || (event.value > 1 && !il->repeat)) { 194 /* 195 * ignore autorepeat + unknown key events 196 * 0 == up, 1 == down, 2 == autorepeat, other == undefined 197 */ 198 continue; 199 } 200 /* keep track of key state */ 201 if (!il->keydown[event.code] && event.value) { 202 il->keydown[event.code] = true; 203 il->keycount++; 204 } 205 if (il->keydown[event.code] && !event.value) { 206 il->keydown[event.code] = false; 207 il->keycount--; 208 } 209 210 /* send event to guest when grab is active */ 211 if (il->grab_active) { 212 int qcode = qemu_input_linux_to_qcode(event.code); 213 qemu_input_event_send_key_qcode(NULL, qcode, event.value); 214 } 215 216 /* hotkey -> record switch request ... */ 217 if (il->keydown[KEY_LEFTCTRL] && 218 il->keydown[KEY_RIGHTCTRL]) { 219 il->grab_request = true; 220 } 221 222 /* 223 * ... and do the switch when all keys are lifted, so we 224 * confuse neither guest nor host with keys which seem to 225 * be stuck due to missing key-up events. 226 */ 227 if (il->grab_request && !il->keycount) { 228 il->grab_request = false; 229 input_linux_toggle_grab(il); 230 } 231 break; 232 } 233 } 234 } 235 236 static void input_linux_event_mouse_button(int button) 237 { 238 qemu_input_queue_btn(NULL, button, true); 239 qemu_input_event_sync(); 240 qemu_input_queue_btn(NULL, button, false); 241 qemu_input_event_sync(); 242 } 243 244 static void input_linux_event_mouse(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 /* only send event to guest when grab is active */ 262 if (!il->grab_active) { 263 continue; 264 } 265 266 switch (event.type) { 267 case EV_KEY: 268 switch (event.code) { 269 case BTN_LEFT: 270 qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event.value); 271 break; 272 case BTN_RIGHT: 273 qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event.value); 274 break; 275 case BTN_MIDDLE: 276 qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event.value); 277 break; 278 case BTN_GEAR_UP: 279 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event.value); 280 break; 281 case BTN_GEAR_DOWN: 282 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN, 283 event.value); 284 break; 285 }; 286 break; 287 case EV_REL: 288 switch (event.code) { 289 case REL_X: 290 qemu_input_queue_rel(NULL, INPUT_AXIS_X, event.value); 291 break; 292 case REL_Y: 293 qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event.value); 294 break; 295 case REL_WHEEL: 296 il->wheel = event.value; 297 break; 298 } 299 break; 300 case EV_SYN: 301 qemu_input_event_sync(); 302 if (il->wheel != 0) { 303 input_linux_event_mouse_button((il->wheel > 0) 304 ? INPUT_BUTTON_WHEEL_UP 305 : INPUT_BUTTON_WHEEL_DOWN); 306 il->wheel = 0; 307 } 308 break; 309 } 310 } 311 } 312 313 int input_linux_init(void *opaque, QemuOpts *opts, Error **errp) 314 { 315 InputLinux *il = g_new0(InputLinux, 1); 316 uint32_t evtmap; 317 int rc, ver; 318 319 il->evdev = qemu_opt_get(opts, "evdev"); 320 il->grab_all = qemu_opt_get_bool(opts, "grab-all", false); 321 il->repeat = qemu_opt_get_bool(opts, "repeat", false); 322 323 if (!il->evdev) { 324 error_setg(errp, "no input device specified"); 325 goto err_free; 326 } 327 328 il->fd = open(il->evdev, O_RDWR); 329 if (il->fd < 0) { 330 error_setg_file_open(errp, errno, il->evdev); 331 goto err_free; 332 } 333 qemu_set_nonblock(il->fd); 334 335 rc = ioctl(il->fd, EVIOCGVERSION, &ver); 336 if (rc < 0) { 337 error_setg(errp, "%s: is not an evdev device", il->evdev); 338 goto err_close; 339 } 340 341 rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap); 342 343 if (evtmap & (1 << EV_REL)) { 344 /* has relative axis -> assume mouse */ 345 qemu_set_fd_handler(il->fd, input_linux_event_mouse, NULL, il); 346 } else if (evtmap & (1 << EV_ABS)) { 347 /* has absolute axis -> not supported */ 348 error_setg(errp, "tablet/touchscreen not supported"); 349 goto err_close; 350 } else if (evtmap & (1 << EV_KEY)) { 351 /* has keys/buttons (and no axis) -> assume keyboard */ 352 qemu_set_fd_handler(il->fd, input_linux_event_keyboard, NULL, il); 353 } else { 354 /* Huh? What is this? */ 355 error_setg(errp, "unknown kind of input device"); 356 goto err_close; 357 } 358 input_linux_toggle_grab(il); 359 QTAILQ_INSERT_TAIL(&inputs, il, next); 360 return 0; 361 362 err_close: 363 close(il->fd); 364 err_free: 365 g_free(il); 366 return -1; 367 } 368 369 static QemuOptsList qemu_input_linux_opts = { 370 .name = "input-linux", 371 .head = QTAILQ_HEAD_INITIALIZER(qemu_input_linux_opts.head), 372 .implied_opt_name = "evdev", 373 .desc = { 374 { 375 .name = "evdev", 376 .type = QEMU_OPT_STRING, 377 },{ 378 .name = "grab-all", 379 .type = QEMU_OPT_BOOL, 380 },{ 381 .name = "repeat", 382 .type = QEMU_OPT_BOOL, 383 }, 384 { /* end of list */ } 385 }, 386 }; 387 388 static void input_linux_register_config(void) 389 { 390 qemu_add_opts(&qemu_input_linux_opts); 391 } 392 opts_init(input_linux_register_config); 393