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7#include "qemu/osdep.h"
8#include "qapi/error.h"
9#include "qemu/config-file.h"
10#include "qemu/main-loop.h"
11#include "qemu/module.h"
12#include "qemu/sockets.h"
13#include "ui/input.h"
14#include "qom/object_interfaces.h"
15#include "sysemu/iothread.h"
16#include "block/aio.h"
17
18#include <sys/ioctl.h>
19#include "standard-headers/linux/input.h"
20#include "qom/object.h"
21
22static bool linux_is_button(unsigned int lnx)
23{
24 if (lnx < 0x100) {
25 return false;
26 }
27 if (lnx >= 0x160 && lnx < 0x2c0) {
28 return false;
29 }
30 return true;
31}
32
33#define TYPE_INPUT_LINUX "input-linux"
34OBJECT_DECLARE_SIMPLE_TYPE(InputLinux,
35 INPUT_LINUX)
36
37
38struct InputLinux {
39 Object parent;
40
41 char *evdev;
42 int fd;
43 bool repeat;
44 bool grab_request;
45 bool grab_active;
46 bool grab_all;
47 bool keydown[KEY_CNT];
48 int keycount;
49 int wheel;
50 bool initialized;
51
52 bool has_rel_x;
53 bool has_abs_x;
54 int num_keys;
55 int num_btns;
56 int abs_x_min;
57 int abs_x_max;
58 int abs_y_min;
59 int abs_y_max;
60 struct input_event event;
61 int read_offset;
62
63 enum GrabToggleKeys grab_toggle;
64
65 QTAILQ_ENTRY(InputLinux) next;
66};
67
68
69static QTAILQ_HEAD(, InputLinux) inputs = QTAILQ_HEAD_INITIALIZER(inputs);
70
71static void input_linux_toggle_grab(InputLinux *il)
72{
73 intptr_t request = !il->grab_active;
74 InputLinux *item;
75 int rc;
76
77 rc = ioctl(il->fd, EVIOCGRAB, request);
78 if (rc < 0) {
79 return;
80 }
81 il->grab_active = !il->grab_active;
82
83 if (!il->grab_all) {
84 return;
85 }
86 QTAILQ_FOREACH(item, &inputs, next) {
87 if (item == il || item->grab_all) {
88
89 continue;
90 }
91 if (item->grab_active != il->grab_active) {
92 input_linux_toggle_grab(item);
93 }
94 }
95}
96
97static bool input_linux_check_toggle(InputLinux *il)
98{
99 switch (il->grab_toggle) {
100 case GRAB_TOGGLE_KEYS_CTRL_CTRL:
101 return il->keydown[KEY_LEFTCTRL] &&
102 il->keydown[KEY_RIGHTCTRL];
103
104 case GRAB_TOGGLE_KEYS_ALT_ALT:
105 return il->keydown[KEY_LEFTALT] &&
106 il->keydown[KEY_RIGHTALT];
107
108 case GRAB_TOGGLE_KEYS_SHIFT_SHIFT:
109 return il->keydown[KEY_LEFTSHIFT] &&
110 il->keydown[KEY_RIGHTSHIFT];
111
112 case GRAB_TOGGLE_KEYS_META_META:
113 return il->keydown[KEY_LEFTMETA] &&
114 il->keydown[KEY_RIGHTMETA];
115
116 case GRAB_TOGGLE_KEYS_SCROLLLOCK:
117 return il->keydown[KEY_SCROLLLOCK];
118
119 case GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK:
120 return (il->keydown[KEY_LEFTCTRL] ||
121 il->keydown[KEY_RIGHTCTRL]) &&
122 il->keydown[KEY_SCROLLLOCK];
123
124 case GRAB_TOGGLE_KEYS__MAX:
125
126 break;
127 }
128 return false;
129}
130
131static bool input_linux_should_skip(InputLinux *il,
132 struct input_event *event)
133{
134 return (il->grab_toggle == GRAB_TOGGLE_KEYS_SCROLLLOCK ||
135 il->grab_toggle == GRAB_TOGGLE_KEYS_CTRL_SCROLLLOCK) &&
136 event->code == KEY_SCROLLLOCK;
137}
138
139static void input_linux_handle_keyboard(InputLinux *il,
140 struct input_event *event)
141{
142 if (event->type == EV_KEY) {
143 if (event->value > 2 || (event->value > 1 && !il->repeat)) {
144
145
146
147
148 return;
149 }
150 if (event->code >= KEY_CNT) {
151
152
153
154
155 return;
156 }
157
158
159 if (!il->keydown[event->code] && event->value) {
160 il->keydown[event->code] = true;
161 il->keycount++;
162 }
163 if (il->keydown[event->code] && !event->value) {
164 il->keydown[event->code] = false;
165 il->keycount--;
166 }
167
168
169 if (il->grab_active && !input_linux_should_skip(il, event)) {
170 int qcode = qemu_input_linux_to_qcode(event->code);
171 qemu_input_event_send_key_qcode(NULL, qcode, event->value);
172 }
173
174
175 if (input_linux_check_toggle(il)) {
176 il->grab_request = true;
177 }
178
179
180
181
182
183
184 if (il->grab_request && !il->keycount) {
185 il->grab_request = false;
186 input_linux_toggle_grab(il);
187 }
188 }
189}
190
191static void input_linux_event_mouse_button(int button)
192{
193 qemu_input_queue_btn(NULL, button, true);
194 qemu_input_event_sync();
195 qemu_input_queue_btn(NULL, button, false);
196 qemu_input_event_sync();
197}
198
199static void input_linux_handle_mouse(InputLinux *il, struct input_event *event)
200{
201 if (!il->grab_active) {
202 return;
203 }
204
205 switch (event->type) {
206 case EV_KEY:
207 switch (event->code) {
208 case BTN_LEFT:
209 qemu_input_queue_btn(NULL, INPUT_BUTTON_LEFT, event->value);
210 break;
211 case BTN_RIGHT:
212 qemu_input_queue_btn(NULL, INPUT_BUTTON_RIGHT, event->value);
213 break;
214 case BTN_MIDDLE:
215 qemu_input_queue_btn(NULL, INPUT_BUTTON_MIDDLE, event->value);
216 break;
217 case BTN_GEAR_UP:
218 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_UP, event->value);
219 break;
220 case BTN_GEAR_DOWN:
221 qemu_input_queue_btn(NULL, INPUT_BUTTON_WHEEL_DOWN,
222 event->value);
223 break;
224 case BTN_SIDE:
225 qemu_input_queue_btn(NULL, INPUT_BUTTON_SIDE, event->value);
226 break;
227 case BTN_EXTRA:
228 qemu_input_queue_btn(NULL, INPUT_BUTTON_EXTRA, event->value);
229 break;
230 };
231 break;
232 case EV_REL:
233 switch (event->code) {
234 case REL_X:
235 qemu_input_queue_rel(NULL, INPUT_AXIS_X, event->value);
236 break;
237 case REL_Y:
238 qemu_input_queue_rel(NULL, INPUT_AXIS_Y, event->value);
239 break;
240 case REL_WHEEL:
241 il->wheel = event->value;
242 break;
243 }
244 break;
245 case EV_ABS:
246 switch (event->code) {
247 case ABS_X:
248 qemu_input_queue_abs(NULL, INPUT_AXIS_X, event->value,
249 il->abs_x_min, il->abs_x_max);
250 break;
251 case ABS_Y:
252 qemu_input_queue_abs(NULL, INPUT_AXIS_Y, event->value,
253 il->abs_y_min, il->abs_y_max);
254 break;
255 }
256 break;
257 case EV_SYN:
258 qemu_input_event_sync();
259 if (il->wheel != 0) {
260 input_linux_event_mouse_button((il->wheel > 0)
261 ? INPUT_BUTTON_WHEEL_UP
262 : INPUT_BUTTON_WHEEL_DOWN);
263 il->wheel = 0;
264 }
265 break;
266 }
267}
268
269static void input_linux_event(void *opaque)
270{
271 InputLinux *il = opaque;
272 int rc;
273 int read_size;
274 uint8_t *p = (uint8_t *)&il->event;
275
276 for (;;) {
277 read_size = sizeof(il->event) - il->read_offset;
278 rc = read(il->fd, &p[il->read_offset], read_size);
279 if (rc != read_size) {
280 if (rc < 0 && errno != EAGAIN) {
281 fprintf(stderr, "%s: read: %s\n", __func__, strerror(errno));
282 qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
283 close(il->fd);
284 } else if (rc > 0) {
285 il->read_offset += rc;
286 }
287 break;
288 }
289 il->read_offset = 0;
290
291 if (il->num_keys) {
292 input_linux_handle_keyboard(il, &il->event);
293 }
294 if ((il->has_rel_x || il->has_abs_x) && il->num_btns) {
295 input_linux_handle_mouse(il, &il->event);
296 }
297 }
298}
299
300static void input_linux_complete(UserCreatable *uc, Error **errp)
301{
302 InputLinux *il = INPUT_LINUX(uc);
303 uint8_t evtmap, relmap, absmap;
304 uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8];
305 unsigned int i;
306 int rc, ver;
307 struct input_absinfo absinfo;
308
309 if (!il->evdev) {
310 error_setg(errp, "no input device specified");
311 return;
312 }
313
314 il->fd = open(il->evdev, O_RDWR);
315 if (il->fd < 0) {
316 error_setg_file_open(errp, errno, il->evdev);
317 return;
318 }
319 qemu_set_nonblock(il->fd);
320
321 rc = ioctl(il->fd, EVIOCGVERSION, &ver);
322 if (rc < 0) {
323 error_setg(errp, "%s: is not an evdev device", il->evdev);
324 goto err_close;
325 }
326
327 rc = ioctl(il->fd, EVIOCGBIT(0, sizeof(evtmap)), &evtmap);
328 if (rc < 0) {
329 goto err_read_event_bits;
330 }
331
332 if (evtmap & (1 << EV_REL)) {
333 relmap = 0;
334 rc = ioctl(il->fd, EVIOCGBIT(EV_REL, sizeof(relmap)), &relmap);
335 if (rc < 0) {
336 goto err_read_event_bits;
337 }
338 if (relmap & (1 << REL_X)) {
339 il->has_rel_x = true;
340 }
341 }
342
343 if (evtmap & (1 << EV_ABS)) {
344 absmap = 0;
345 rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
346 if (rc < 0) {
347 goto err_read_event_bits;
348 }
349 if (absmap & (1 << ABS_X)) {
350 il->has_abs_x = true;
351 rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
352 if (rc < 0) {
353 error_setg(errp, "%s: failed to get get absolute X value",
354 il->evdev);
355 goto err_close;
356 }
357 il->abs_x_min = absinfo.minimum;
358 il->abs_x_max = absinfo.maximum;
359 rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
360 if (rc < 0) {
361 error_setg(errp, "%s: failed to get get absolute Y value",
362 il->evdev);
363 goto err_close;
364 }
365 il->abs_y_min = absinfo.minimum;
366 il->abs_y_max = absinfo.maximum;
367 }
368 }
369
370 if (evtmap & (1 << EV_KEY)) {
371 memset(keymap, 0, sizeof(keymap));
372 rc = ioctl(il->fd, EVIOCGBIT(EV_KEY, sizeof(keymap)), keymap);
373 if (rc < 0) {
374 goto err_read_event_bits;
375 }
376 rc = ioctl(il->fd, EVIOCGKEY(sizeof(keystate)), keystate);
377 if (rc < 0) {
378 error_setg(errp, "%s: failed to get global key state", il->evdev);
379 goto err_close;
380 }
381 for (i = 0; i < KEY_CNT; i++) {
382 if (keymap[i / 8] & (1 << (i % 8))) {
383 if (linux_is_button(i)) {
384 il->num_btns++;
385 } else {
386 il->num_keys++;
387 }
388 if (keystate[i / 8] & (1 << (i % 8))) {
389 il->keydown[i] = true;
390 il->keycount++;
391 }
392 }
393 }
394 }
395
396 qemu_set_fd_handler(il->fd, input_linux_event, NULL, il);
397 if (il->keycount) {
398
399 il->grab_request = true;
400 } else {
401 input_linux_toggle_grab(il);
402 }
403 QTAILQ_INSERT_TAIL(&inputs, il, next);
404 il->initialized = true;
405 return;
406
407err_read_event_bits:
408 error_setg(errp, "%s: failed to read event bits", il->evdev);
409
410err_close:
411 close(il->fd);
412 return;
413}
414
415static void input_linux_instance_finalize(Object *obj)
416{
417 InputLinux *il = INPUT_LINUX(obj);
418
419 if (il->initialized) {
420 QTAILQ_REMOVE(&inputs, il, next);
421 qemu_set_fd_handler(il->fd, NULL, NULL, NULL);
422 close(il->fd);
423 }
424 g_free(il->evdev);
425}
426
427static char *input_linux_get_evdev(Object *obj, Error **errp)
428{
429 InputLinux *il = INPUT_LINUX(obj);
430
431 return g_strdup(il->evdev);
432}
433
434static void input_linux_set_evdev(Object *obj, const char *value,
435 Error **errp)
436{
437 InputLinux *il = INPUT_LINUX(obj);
438
439 if (il->evdev) {
440 error_setg(errp, "evdev property already set");
441 return;
442 }
443 il->evdev = g_strdup(value);
444}
445
446static bool input_linux_get_grab_all(Object *obj, Error **errp)
447{
448 InputLinux *il = INPUT_LINUX(obj);
449
450 return il->grab_all;
451}
452
453static void input_linux_set_grab_all(Object *obj, bool value,
454 Error **errp)
455{
456 InputLinux *il = INPUT_LINUX(obj);
457
458 il->grab_all = value;
459}
460
461static bool input_linux_get_repeat(Object *obj, Error **errp)
462{
463 InputLinux *il = INPUT_LINUX(obj);
464
465 return il->repeat;
466}
467
468static void input_linux_set_repeat(Object *obj, bool value,
469 Error **errp)
470{
471 InputLinux *il = INPUT_LINUX(obj);
472
473 il->repeat = value;
474}
475
476static int input_linux_get_grab_toggle(Object *obj, Error **errp)
477{
478 InputLinux *il = INPUT_LINUX(obj);
479
480 return il->grab_toggle;
481}
482
483static void input_linux_set_grab_toggle(Object *obj, int value,
484 Error **errp)
485{
486 InputLinux *il = INPUT_LINUX(obj);
487
488 il->grab_toggle = value;
489}
490
491static void input_linux_instance_init(Object *obj)
492{
493}
494
495static void input_linux_class_init(ObjectClass *oc, void *data)
496{
497 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
498
499 ucc->complete = input_linux_complete;
500
501 object_class_property_add_str(oc, "evdev",
502 input_linux_get_evdev,
503 input_linux_set_evdev);
504 object_class_property_add_bool(oc, "grab_all",
505 input_linux_get_grab_all,
506 input_linux_set_grab_all);
507 object_class_property_add_bool(oc, "repeat",
508 input_linux_get_repeat,
509 input_linux_set_repeat);
510 object_class_property_add_enum(oc, "grab-toggle", "GrabToggleKeys",
511 &GrabToggleKeys_lookup,
512 input_linux_get_grab_toggle,
513 input_linux_set_grab_toggle);
514}
515
516static const TypeInfo input_linux_info = {
517 .name = TYPE_INPUT_LINUX,
518 .parent = TYPE_OBJECT,
519 .class_init = input_linux_class_init,
520 .instance_size = sizeof(InputLinux),
521 .instance_init = input_linux_instance_init,
522 .instance_finalize = input_linux_instance_finalize,
523 .interfaces = (InterfaceInfo[]) {
524 { TYPE_USER_CREATABLE },
525 { }
526 }
527};
528
529static void register_types(void)
530{
531 type_register_static(&input_linux_info);
532}
533
534type_init(register_types);
535
