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1 | /* | |
2 | * QEMU HID devices | |
3 | * | |
4 | * Copyright (c) 2005 Fabrice Bellard | |
5 | * Copyright (c) 2007 OpenMoko, Inc. (andrew@openedhand.com) | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | #include "qemu/osdep.h" | |
26 | #include "hw/hw.h" | |
27 | #include "ui/console.h" | |
28 | #include "qemu/timer.h" | |
29 | #include "hw/input/hid.h" | |
30 | ||
31 | #define HID_USAGE_ERROR_ROLLOVER 0x01 | |
32 | #define HID_USAGE_POSTFAIL 0x02 | |
33 | #define HID_USAGE_ERROR_UNDEFINED 0x03 | |
34 | ||
35 | /* Indices are QEMU keycodes, values are from HID Usage Table. Indices | |
36 | * above 0x80 are for keys that come after 0xe0 or 0xe1+0x1d or 0xe1+0x9d. */ | |
37 | static const uint8_t hid_usage_keys[0x100] = { | |
38 | 0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, | |
39 | 0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b, | |
40 | 0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, | |
41 | 0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16, | |
42 | 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33, | |
43 | 0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19, | |
44 | 0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55, | |
45 | 0xe2, 0x2c, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, | |
46 | 0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f, | |
47 | 0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59, | |
48 | 0x5a, 0x5b, 0x62, 0x63, 0x00, 0x00, 0x64, 0x44, | |
49 | 0x45, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, | |
50 | 0xe8, 0xe9, 0x71, 0x72, 0x73, 0x00, 0x00, 0x00, | |
51 | 0x00, 0x00, 0x00, 0x85, 0x00, 0x00, 0x00, 0x00, | |
52 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
53 | 0x00, 0x00, 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, | |
54 | ||
55 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
56 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
57 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
58 | 0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00, | |
59 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
60 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
61 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46, | |
62 | 0xe6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
63 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x4a, | |
64 | 0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d, | |
65 | 0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00, | |
66 | 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x00, 0x00, | |
67 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
68 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
69 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
70 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
71 | }; | |
72 | ||
73 | bool hid_has_events(HIDState *hs) | |
74 | { | |
75 | return hs->n > 0 || hs->idle_pending; | |
76 | } | |
77 | ||
78 | static void hid_idle_timer(void *opaque) | |
79 | { | |
80 | HIDState *hs = opaque; | |
81 | ||
82 | hs->idle_pending = true; | |
83 | hs->event(hs); | |
84 | } | |
85 | ||
86 | static void hid_del_idle_timer(HIDState *hs) | |
87 | { | |
88 | if (hs->idle_timer) { | |
89 | timer_del(hs->idle_timer); | |
90 | timer_free(hs->idle_timer); | |
91 | hs->idle_timer = NULL; | |
92 | } | |
93 | } | |
94 | ||
95 | void hid_set_next_idle(HIDState *hs) | |
96 | { | |
97 | if (hs->idle) { | |
98 | uint64_t expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + | |
99 | NANOSECONDS_PER_SECOND * hs->idle * 4 / 1000; | |
100 | if (!hs->idle_timer) { | |
101 | hs->idle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, hid_idle_timer, hs); | |
102 | } | |
103 | timer_mod_ns(hs->idle_timer, expire_time); | |
104 | } else { | |
105 | hid_del_idle_timer(hs); | |
106 | } | |
107 | } | |
108 | ||
109 | static void hid_pointer_event(DeviceState *dev, QemuConsole *src, | |
110 | InputEvent *evt) | |
111 | { | |
112 | static const int bmap[INPUT_BUTTON__MAX] = { | |
113 | [INPUT_BUTTON_LEFT] = 0x01, | |
114 | [INPUT_BUTTON_RIGHT] = 0x02, | |
115 | [INPUT_BUTTON_MIDDLE] = 0x04, | |
116 | }; | |
117 | HIDState *hs = (HIDState *)dev; | |
118 | HIDPointerEvent *e; | |
119 | InputMoveEvent *move; | |
120 | InputBtnEvent *btn; | |
121 | ||
122 | assert(hs->n < QUEUE_LENGTH); | |
123 | e = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK]; | |
124 | ||
125 | switch (evt->type) { | |
126 | case INPUT_EVENT_KIND_REL: | |
127 | move = evt->u.rel.data; | |
128 | if (move->axis == INPUT_AXIS_X) { | |
129 | e->xdx += move->value; | |
130 | } else if (move->axis == INPUT_AXIS_Y) { | |
131 | e->ydy += move->value; | |
132 | } | |
133 | break; | |
134 | ||
135 | case INPUT_EVENT_KIND_ABS: | |
136 | move = evt->u.abs.data; | |
137 | if (move->axis == INPUT_AXIS_X) { | |
138 | e->xdx = move->value; | |
139 | } else if (move->axis == INPUT_AXIS_Y) { | |
140 | e->ydy = move->value; | |
141 | } | |
142 | break; | |
143 | ||
144 | case INPUT_EVENT_KIND_BTN: | |
145 | btn = evt->u.btn.data; | |
146 | if (btn->down) { | |
147 | e->buttons_state |= bmap[btn->button]; | |
148 | if (btn->button == INPUT_BUTTON_WHEEL_UP) { | |
149 | e->dz--; | |
150 | } else if (btn->button == INPUT_BUTTON_WHEEL_DOWN) { | |
151 | e->dz++; | |
152 | } | |
153 | } else { | |
154 | e->buttons_state &= ~bmap[btn->button]; | |
155 | } | |
156 | break; | |
157 | ||
158 | default: | |
159 | /* keep gcc happy */ | |
160 | break; | |
161 | } | |
162 | ||
163 | } | |
164 | ||
165 | static void hid_pointer_sync(DeviceState *dev) | |
166 | { | |
167 | HIDState *hs = (HIDState *)dev; | |
168 | HIDPointerEvent *prev, *curr, *next; | |
169 | bool event_compression = false; | |
170 | ||
171 | if (hs->n == QUEUE_LENGTH-1) { | |
172 | /* | |
173 | * Queue full. We are losing information, but we at least | |
174 | * keep track of most recent button state. | |
175 | */ | |
176 | return; | |
177 | } | |
178 | ||
179 | prev = &hs->ptr.queue[(hs->head + hs->n - 1) & QUEUE_MASK]; | |
180 | curr = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK]; | |
181 | next = &hs->ptr.queue[(hs->head + hs->n + 1) & QUEUE_MASK]; | |
182 | ||
183 | if (hs->n > 0) { | |
184 | /* | |
185 | * No button state change between previous and current event | |
186 | * (and previous wasn't seen by the guest yet), so there is | |
187 | * motion information only and we can combine the two event | |
188 | * into one. | |
189 | */ | |
190 | if (curr->buttons_state == prev->buttons_state) { | |
191 | event_compression = true; | |
192 | } | |
193 | } | |
194 | ||
195 | if (event_compression) { | |
196 | /* add current motion to previous, clear current */ | |
197 | if (hs->kind == HID_MOUSE) { | |
198 | prev->xdx += curr->xdx; | |
199 | curr->xdx = 0; | |
200 | prev->ydy += curr->ydy; | |
201 | curr->ydy = 0; | |
202 | } else { | |
203 | prev->xdx = curr->xdx; | |
204 | prev->ydy = curr->ydy; | |
205 | } | |
206 | prev->dz += curr->dz; | |
207 | curr->dz = 0; | |
208 | } else { | |
209 | /* prepate next (clear rel, copy abs + btns) */ | |
210 | if (hs->kind == HID_MOUSE) { | |
211 | next->xdx = 0; | |
212 | next->ydy = 0; | |
213 | } else { | |
214 | next->xdx = curr->xdx; | |
215 | next->ydy = curr->ydy; | |
216 | } | |
217 | next->dz = 0; | |
218 | next->buttons_state = curr->buttons_state; | |
219 | /* make current guest visible, notify guest */ | |
220 | hs->n++; | |
221 | hs->event(hs); | |
222 | } | |
223 | } | |
224 | ||
225 | static void hid_keyboard_event(DeviceState *dev, QemuConsole *src, | |
226 | InputEvent *evt) | |
227 | { | |
228 | HIDState *hs = (HIDState *)dev; | |
229 | int scancodes[3], i, count; | |
230 | int slot; | |
231 | InputKeyEvent *key = evt->u.key.data; | |
232 | ||
233 | count = qemu_input_key_value_to_scancode(key->key, | |
234 | key->down, | |
235 | scancodes); | |
236 | if (hs->n + count > QUEUE_LENGTH) { | |
237 | fprintf(stderr, "usb-kbd: warning: key event queue full\n"); | |
238 | return; | |
239 | } | |
240 | for (i = 0; i < count; i++) { | |
241 | slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++; | |
242 | hs->kbd.keycodes[slot] = scancodes[i]; | |
243 | } | |
244 | hs->event(hs); | |
245 | } | |
246 | ||
247 | static void hid_keyboard_process_keycode(HIDState *hs) | |
248 | { | |
249 | uint8_t hid_code, index, key; | |
250 | int i, keycode, slot; | |
251 | ||
252 | if (hs->n == 0) { | |
253 | return; | |
254 | } | |
255 | slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--; | |
256 | keycode = hs->kbd.keycodes[slot]; | |
257 | ||
258 | key = keycode & 0x7f; | |
259 | index = key | ((hs->kbd.modifiers & (1 << 8)) >> 1); | |
260 | hid_code = hid_usage_keys[index]; | |
261 | hs->kbd.modifiers &= ~(1 << 8); | |
262 | ||
263 | switch (hid_code) { | |
264 | case 0x00: | |
265 | return; | |
266 | ||
267 | case 0xe0: | |
268 | assert(key == 0x1d); | |
269 | if (hs->kbd.modifiers & (1 << 9)) { | |
270 | /* The hid_codes for the 0xe1/0x1d scancode sequence are 0xe9/0xe0. | |
271 | * Here we're processing the second hid_code. By dropping bit 9 | |
272 | * and setting bit 8, the scancode after 0x1d will access the | |
273 | * second half of the table. | |
274 | */ | |
275 | hs->kbd.modifiers ^= (1 << 8) | (1 << 9); | |
276 | return; | |
277 | } | |
278 | /* fall through to process Ctrl_L */ | |
279 | case 0xe1 ... 0xe7: | |
280 | /* Ctrl_L/Ctrl_R, Shift_L/Shift_R, Alt_L/Alt_R, Win_L/Win_R. | |
281 | * Handle releases here, or fall through to process presses. | |
282 | */ | |
283 | if (keycode & (1 << 7)) { | |
284 | hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f)); | |
285 | return; | |
286 | } | |
287 | /* fall through */ | |
288 | case 0xe8 ... 0xe9: | |
289 | /* USB modifiers are just 1 byte long. Bits 8 and 9 of | |
290 | * hs->kbd.modifiers implement a state machine that detects the | |
291 | * 0xe0 and 0xe1/0x1d sequences. These bits do not follow the | |
292 | * usual rules where bit 7 marks released keys; they are cleared | |
293 | * elsewhere in the function as the state machine dictates. | |
294 | */ | |
295 | hs->kbd.modifiers |= 1 << (hid_code & 0x0f); | |
296 | return; | |
297 | ||
298 | case 0xea ... 0xef: | |
299 | abort(); | |
300 | ||
301 | default: | |
302 | break; | |
303 | } | |
304 | ||
305 | if (keycode & (1 << 7)) { | |
306 | for (i = hs->kbd.keys - 1; i >= 0; i--) { | |
307 | if (hs->kbd.key[i] == hid_code) { | |
308 | hs->kbd.key[i] = hs->kbd.key[-- hs->kbd.keys]; | |
309 | hs->kbd.key[hs->kbd.keys] = 0x00; | |
310 | break; | |
311 | } | |
312 | } | |
313 | if (i < 0) { | |
314 | return; | |
315 | } | |
316 | } else { | |
317 | for (i = hs->kbd.keys - 1; i >= 0; i--) { | |
318 | if (hs->kbd.key[i] == hid_code) { | |
319 | break; | |
320 | } | |
321 | } | |
322 | if (i < 0) { | |
323 | if (hs->kbd.keys < sizeof(hs->kbd.key)) { | |
324 | hs->kbd.key[hs->kbd.keys++] = hid_code; | |
325 | } | |
326 | } else { | |
327 | return; | |
328 | } | |
329 | } | |
330 | } | |
331 | ||
332 | static inline int int_clamp(int val, int vmin, int vmax) | |
333 | { | |
334 | if (val < vmin) { | |
335 | return vmin; | |
336 | } else if (val > vmax) { | |
337 | return vmax; | |
338 | } else { | |
339 | return val; | |
340 | } | |
341 | } | |
342 | ||
343 | void hid_pointer_activate(HIDState *hs) | |
344 | { | |
345 | if (!hs->ptr.mouse_grabbed) { | |
346 | qemu_input_handler_activate(hs->s); | |
347 | hs->ptr.mouse_grabbed = 1; | |
348 | } | |
349 | } | |
350 | ||
351 | int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len) | |
352 | { | |
353 | int dx, dy, dz, l; | |
354 | int index; | |
355 | HIDPointerEvent *e; | |
356 | ||
357 | hs->idle_pending = false; | |
358 | ||
359 | hid_pointer_activate(hs); | |
360 | ||
361 | /* When the buffer is empty, return the last event. Relative | |
362 | movements will all be zero. */ | |
363 | index = (hs->n ? hs->head : hs->head - 1); | |
364 | e = &hs->ptr.queue[index & QUEUE_MASK]; | |
365 | ||
366 | if (hs->kind == HID_MOUSE) { | |
367 | dx = int_clamp(e->xdx, -127, 127); | |
368 | dy = int_clamp(e->ydy, -127, 127); | |
369 | e->xdx -= dx; | |
370 | e->ydy -= dy; | |
371 | } else { | |
372 | dx = e->xdx; | |
373 | dy = e->ydy; | |
374 | } | |
375 | dz = int_clamp(e->dz, -127, 127); | |
376 | e->dz -= dz; | |
377 | ||
378 | if (hs->n && | |
379 | !e->dz && | |
380 | (hs->kind == HID_TABLET || (!e->xdx && !e->ydy))) { | |
381 | /* that deals with this event */ | |
382 | QUEUE_INCR(hs->head); | |
383 | hs->n--; | |
384 | } | |
385 | ||
386 | /* Appears we have to invert the wheel direction */ | |
387 | dz = 0 - dz; | |
388 | l = 0; | |
389 | switch (hs->kind) { | |
390 | case HID_MOUSE: | |
391 | if (len > l) { | |
392 | buf[l++] = e->buttons_state; | |
393 | } | |
394 | if (len > l) { | |
395 | buf[l++] = dx; | |
396 | } | |
397 | if (len > l) { | |
398 | buf[l++] = dy; | |
399 | } | |
400 | if (len > l) { | |
401 | buf[l++] = dz; | |
402 | } | |
403 | break; | |
404 | ||
405 | case HID_TABLET: | |
406 | if (len > l) { | |
407 | buf[l++] = e->buttons_state; | |
408 | } | |
409 | if (len > l) { | |
410 | buf[l++] = dx & 0xff; | |
411 | } | |
412 | if (len > l) { | |
413 | buf[l++] = dx >> 8; | |
414 | } | |
415 | if (len > l) { | |
416 | buf[l++] = dy & 0xff; | |
417 | } | |
418 | if (len > l) { | |
419 | buf[l++] = dy >> 8; | |
420 | } | |
421 | if (len > l) { | |
422 | buf[l++] = dz; | |
423 | } | |
424 | break; | |
425 | ||
426 | default: | |
427 | abort(); | |
428 | } | |
429 | ||
430 | return l; | |
431 | } | |
432 | ||
433 | int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len) | |
434 | { | |
435 | hs->idle_pending = false; | |
436 | ||
437 | if (len < 2) { | |
438 | return 0; | |
439 | } | |
440 | ||
441 | hid_keyboard_process_keycode(hs); | |
442 | ||
443 | buf[0] = hs->kbd.modifiers & 0xff; | |
444 | buf[1] = 0; | |
445 | if (hs->kbd.keys > 6) { | |
446 | memset(buf + 2, HID_USAGE_ERROR_ROLLOVER, MIN(8, len) - 2); | |
447 | } else { | |
448 | memcpy(buf + 2, hs->kbd.key, MIN(8, len) - 2); | |
449 | } | |
450 | ||
451 | return MIN(8, len); | |
452 | } | |
453 | ||
454 | int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len) | |
455 | { | |
456 | if (len > 0) { | |
457 | int ledstate = 0; | |
458 | /* 0x01: Num Lock LED | |
459 | * 0x02: Caps Lock LED | |
460 | * 0x04: Scroll Lock LED | |
461 | * 0x08: Compose LED | |
462 | * 0x10: Kana LED */ | |
463 | hs->kbd.leds = buf[0]; | |
464 | if (hs->kbd.leds & 0x04) { | |
465 | ledstate |= QEMU_SCROLL_LOCK_LED; | |
466 | } | |
467 | if (hs->kbd.leds & 0x01) { | |
468 | ledstate |= QEMU_NUM_LOCK_LED; | |
469 | } | |
470 | if (hs->kbd.leds & 0x02) { | |
471 | ledstate |= QEMU_CAPS_LOCK_LED; | |
472 | } | |
473 | kbd_put_ledstate(ledstate); | |
474 | } | |
475 | return 0; | |
476 | } | |
477 | ||
478 | void hid_reset(HIDState *hs) | |
479 | { | |
480 | switch (hs->kind) { | |
481 | case HID_KEYBOARD: | |
482 | memset(hs->kbd.keycodes, 0, sizeof(hs->kbd.keycodes)); | |
483 | memset(hs->kbd.key, 0, sizeof(hs->kbd.key)); | |
484 | hs->kbd.keys = 0; | |
485 | break; | |
486 | case HID_MOUSE: | |
487 | case HID_TABLET: | |
488 | memset(hs->ptr.queue, 0, sizeof(hs->ptr.queue)); | |
489 | break; | |
490 | } | |
491 | hs->head = 0; | |
492 | hs->n = 0; | |
493 | hs->protocol = 1; | |
494 | hs->idle = 0; | |
495 | hs->idle_pending = false; | |
496 | hid_del_idle_timer(hs); | |
497 | } | |
498 | ||
499 | void hid_free(HIDState *hs) | |
500 | { | |
501 | qemu_input_handler_unregister(hs->s); | |
502 | hid_del_idle_timer(hs); | |
503 | } | |
504 | ||
505 | static QemuInputHandler hid_keyboard_handler = { | |
506 | .name = "QEMU HID Keyboard", | |
507 | .mask = INPUT_EVENT_MASK_KEY, | |
508 | .event = hid_keyboard_event, | |
509 | }; | |
510 | ||
511 | static QemuInputHandler hid_mouse_handler = { | |
512 | .name = "QEMU HID Mouse", | |
513 | .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL, | |
514 | .event = hid_pointer_event, | |
515 | .sync = hid_pointer_sync, | |
516 | }; | |
517 | ||
518 | static QemuInputHandler hid_tablet_handler = { | |
519 | .name = "QEMU HID Tablet", | |
520 | .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS, | |
521 | .event = hid_pointer_event, | |
522 | .sync = hid_pointer_sync, | |
523 | }; | |
524 | ||
525 | void hid_init(HIDState *hs, int kind, HIDEventFunc event) | |
526 | { | |
527 | hs->kind = kind; | |
528 | hs->event = event; | |
529 | ||
530 | if (hs->kind == HID_KEYBOARD) { | |
531 | hs->s = qemu_input_handler_register((DeviceState *)hs, | |
532 | &hid_keyboard_handler); | |
533 | qemu_input_handler_activate(hs->s); | |
534 | } else if (hs->kind == HID_MOUSE) { | |
535 | hs->s = qemu_input_handler_register((DeviceState *)hs, | |
536 | &hid_mouse_handler); | |
537 | } else if (hs->kind == HID_TABLET) { | |
538 | hs->s = qemu_input_handler_register((DeviceState *)hs, | |
539 | &hid_tablet_handler); | |
540 | } | |
541 | } | |
542 | ||
543 | static int hid_post_load(void *opaque, int version_id) | |
544 | { | |
545 | HIDState *s = opaque; | |
546 | ||
547 | hid_set_next_idle(s); | |
548 | ||
549 | if (s->n == QUEUE_LENGTH && (s->kind == HID_TABLET || | |
550 | s->kind == HID_MOUSE)) { | |
551 | /* | |
552 | * Handle ptr device migration from old qemu with full queue. | |
553 | * | |
554 | * Throw away everything but the last event, so we propagate | |
555 | * at least the current button state to the guest. Also keep | |
556 | * current position for the tablet, signal "no motion" for the | |
557 | * mouse. | |
558 | */ | |
559 | HIDPointerEvent evt; | |
560 | evt = s->ptr.queue[(s->head+s->n) & QUEUE_MASK]; | |
561 | if (s->kind == HID_MOUSE) { | |
562 | evt.xdx = 0; | |
563 | evt.ydy = 0; | |
564 | } | |
565 | s->ptr.queue[0] = evt; | |
566 | s->head = 0; | |
567 | s->n = 1; | |
568 | } | |
569 | return 0; | |
570 | } | |
571 | ||
572 | static const VMStateDescription vmstate_hid_ptr_queue = { | |
573 | .name = "HIDPointerEventQueue", | |
574 | .version_id = 1, | |
575 | .minimum_version_id = 1, | |
576 | .fields = (VMStateField[]) { | |
577 | VMSTATE_INT32(xdx, HIDPointerEvent), | |
578 | VMSTATE_INT32(ydy, HIDPointerEvent), | |
579 | VMSTATE_INT32(dz, HIDPointerEvent), | |
580 | VMSTATE_INT32(buttons_state, HIDPointerEvent), | |
581 | VMSTATE_END_OF_LIST() | |
582 | } | |
583 | }; | |
584 | ||
585 | const VMStateDescription vmstate_hid_ptr_device = { | |
586 | .name = "HIDPointerDevice", | |
587 | .version_id = 1, | |
588 | .minimum_version_id = 1, | |
589 | .post_load = hid_post_load, | |
590 | .fields = (VMStateField[]) { | |
591 | VMSTATE_STRUCT_ARRAY(ptr.queue, HIDState, QUEUE_LENGTH, 0, | |
592 | vmstate_hid_ptr_queue, HIDPointerEvent), | |
593 | VMSTATE_UINT32(head, HIDState), | |
594 | VMSTATE_UINT32(n, HIDState), | |
595 | VMSTATE_INT32(protocol, HIDState), | |
596 | VMSTATE_UINT8(idle, HIDState), | |
597 | VMSTATE_END_OF_LIST(), | |
598 | } | |
599 | }; | |
600 | ||
601 | const VMStateDescription vmstate_hid_keyboard_device = { | |
602 | .name = "HIDKeyboardDevice", | |
603 | .version_id = 1, | |
604 | .minimum_version_id = 1, | |
605 | .post_load = hid_post_load, | |
606 | .fields = (VMStateField[]) { | |
607 | VMSTATE_UINT32_ARRAY(kbd.keycodes, HIDState, QUEUE_LENGTH), | |
608 | VMSTATE_UINT32(head, HIDState), | |
609 | VMSTATE_UINT32(n, HIDState), | |
610 | VMSTATE_UINT16(kbd.modifiers, HIDState), | |
611 | VMSTATE_UINT8(kbd.leds, HIDState), | |
612 | VMSTATE_UINT8_ARRAY(kbd.key, HIDState, 16), | |
613 | VMSTATE_INT32(kbd.keys, HIDState), | |
614 | VMSTATE_INT32(protocol, HIDState), | |
615 | VMSTATE_UINT8(idle, HIDState), | |
616 | VMSTATE_END_OF_LIST(), | |
617 | } | |
618 | }; |