2 * QEMU PS/2 keyboard/mouse emulation
4 * Copyright (c) 2003 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "hw/input/ps2.h"
26 #include "ui/console.h"
28 #include "sysemu/sysemu.h"
31 /* to guarantee safe serialization of input event by Munkyu Im */
32 #include "qemu/thread.h"
33 static QemuMutex mutex;
35 /* debug PC keyboard */
38 /* debug PC keyboard : only mouse */
41 /* Keyboard Commands */
42 #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
43 #define KBD_CMD_ECHO 0xEE
44 #define KBD_CMD_SCANCODE 0xF0 /* Get/set scancode set */
45 #define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
46 #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
47 #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
48 #define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
49 #define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
50 #define KBD_CMD_RESET 0xFF /* Reset */
52 /* Keyboard Replies */
53 #define KBD_REPLY_POR 0xAA /* Power on reset */
54 #define KBD_REPLY_ID 0xAB /* Keyboard ID */
55 #define KBD_REPLY_ACK 0xFA /* Command ACK */
56 #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
59 #define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
60 #define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
61 #define AUX_SET_RES 0xE8 /* Set resolution */
62 #define AUX_GET_SCALE 0xE9 /* Get scaling factor */
63 #define AUX_SET_STREAM 0xEA /* Set stream mode */
64 #define AUX_POLL 0xEB /* Poll */
65 #define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
66 #define AUX_SET_WRAP 0xEE /* Set wrap mode */
67 #define AUX_SET_REMOTE 0xF0 /* Set remote mode */
68 #define AUX_GET_TYPE 0xF2 /* Get type */
69 #define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
70 #define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
71 #define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
72 #define AUX_SET_DEFAULT 0xF6
73 #define AUX_RESET 0xFF /* Reset aux device */
74 #define AUX_ACK 0xFA /* Command byte ACK. */
76 #define MOUSE_STATUS_REMOTE 0x40
77 #define MOUSE_STATUS_ENABLED 0x20
78 #define MOUSE_STATUS_SCALE21 0x10
80 #define PS2_QUEUE_SIZE 16 /* Buffer size required by PS/2 protocol */
83 /* Keep the data array 256 bytes long, which compatibility
84 with older qemu versions. */
86 int rptr, wptr, count;
92 void (*update_irq)(void *, int);
99 /* QEMU uses translated PC scancodes internally. To avoid multiple
100 conversions we do the translation (if any) in the PS/2 emulation
101 not the keyboard controller. */
103 int scancode_set; /* 1=XT, 2=AT, 3=PS/2 */
109 uint8_t mouse_status;
110 uint8_t mouse_resolution;
111 uint8_t mouse_sample_rate;
113 uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
114 uint8_t mouse_detect_state;
115 int mouse_dx; /* current values, needed for 'poll' mode */
118 uint8_t mouse_buttons;
121 /* Table to convert from PC scancodes to raw scancodes. */
122 static const unsigned char ps2_raw_keycode[128] = {
123 0, 118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85, 102, 13,
124 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
125 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
126 50, 49, 58, 65, 73, 74, 89, 124, 17, 41, 88, 5, 6, 4, 12, 3,
127 11, 2, 10, 1, 9, 119, 126, 108, 117, 125, 123, 107, 115, 116, 121, 105,
128 114, 122, 112, 113, 127, 96, 97, 120, 7, 15, 23, 31, 39, 47, 55, 63,
129 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87, 111,
130 19, 25, 57, 81, 83, 92, 95, 98, 99, 100, 101, 103, 104, 106, 109, 110
132 static const unsigned char ps2_raw_keycode_set3[128] = {
133 0, 8, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85, 102, 13,
134 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 17, 28, 27,
135 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 92, 26, 34, 33, 42,
136 50, 49, 58, 65, 73, 74, 89, 126, 25, 41, 20, 7, 15, 23, 31, 39,
137 47, 2, 63, 71, 79, 118, 95, 108, 117, 125, 132, 107, 115, 116, 124, 105,
138 114, 122, 112, 113, 127, 96, 97, 86, 94, 15, 23, 31, 39, 47, 55, 63,
139 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87, 111,
140 19, 25, 57, 81, 83, 92, 95, 98, 99, 100, 101, 103, 104, 106, 109, 110
143 void ps2_queue(void *opaque, int b)
145 PS2State *s = (PS2State *)opaque;
146 PS2Queue *q = &s->queue;
148 if (q->count >= PS2_QUEUE_SIZE - 1)
150 q->data[q->wptr] = b;
151 if (++q->wptr == PS2_QUEUE_SIZE)
154 s->update_irq(s->update_arg, 1);
158 keycode is expressed as follow:
159 bit 7 - 0 key pressed, 1 = key released
160 bits 6-0 - translated scancode set 2
162 static void ps2_put_keycode(void *opaque, int keycode)
164 PS2KbdState *s = opaque;
166 qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
167 /* XXX: add support for scancode set 1 */
168 if (!s->translate && keycode < 0xe0 && s->scancode_set > 1) {
169 if (keycode & 0x80) {
170 ps2_queue(&s->common, 0xf0);
172 if (s->scancode_set == 2) {
173 keycode = ps2_raw_keycode[keycode & 0x7f];
174 } else if (s->scancode_set == 3) {
175 keycode = ps2_raw_keycode_set3[keycode & 0x7f];
178 ps2_queue(&s->common, keycode);
181 static void ps2_keyboard_event(DeviceState *dev, QemuConsole *src,
184 PS2KbdState *s = (PS2KbdState *)dev;
185 int scancodes[3], i, count;
187 qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
188 count = qemu_input_key_value_to_scancode(evt->key->key,
191 for (i = 0; i < count; i++) {
192 ps2_put_keycode(s, scancodes[i]);
196 uint32_t ps2_read_data(void *opaque)
198 PS2State *s = (PS2State *)opaque;
204 /* NOTE: if no data left, we return the last keyboard one
205 (needed for EMM386) */
206 /* XXX: need a timer to do things correctly */
209 index = PS2_QUEUE_SIZE - 1;
210 val = q->data[index];
212 val = q->data[q->rptr];
213 if (++q->rptr == PS2_QUEUE_SIZE)
216 /* reading deasserts IRQ */
217 s->update_irq(s->update_arg, 0);
218 /* reassert IRQs if data left */
219 s->update_irq(s->update_arg, q->count != 0);
224 static void ps2_set_ledstate(PS2KbdState *s, int ledstate)
226 s->ledstate = ledstate;
227 kbd_put_ledstate(ledstate);
230 static void ps2_reset_keyboard(PS2KbdState *s)
234 ps2_set_ledstate(s, 0);
237 void ps2_write_keyboard(void *opaque, int val)
239 PS2KbdState *s = (PS2KbdState *)opaque;
241 switch(s->common.write_cmd) {
246 ps2_queue(&s->common, KBD_REPLY_ACK);
249 ps2_queue(&s->common, KBD_REPLY_RESEND);
252 ps2_queue(&s->common, KBD_REPLY_ACK);
253 /* We emulate a MF2 AT keyboard here */
254 ps2_queue(&s->common, KBD_REPLY_ID);
256 ps2_queue(&s->common, 0x41);
258 ps2_queue(&s->common, 0x83);
261 ps2_queue(&s->common, KBD_CMD_ECHO);
265 ps2_queue(&s->common, KBD_REPLY_ACK);
267 case KBD_CMD_SCANCODE:
268 case KBD_CMD_SET_LEDS:
269 case KBD_CMD_SET_RATE:
270 s->common.write_cmd = val;
271 ps2_queue(&s->common, KBD_REPLY_ACK);
273 case KBD_CMD_RESET_DISABLE:
274 ps2_reset_keyboard(s);
276 ps2_queue(&s->common, KBD_REPLY_ACK);
278 case KBD_CMD_RESET_ENABLE:
279 ps2_reset_keyboard(s);
281 ps2_queue(&s->common, KBD_REPLY_ACK);
284 ps2_reset_keyboard(s);
285 ps2_queue(&s->common, KBD_REPLY_ACK);
286 ps2_queue(&s->common, KBD_REPLY_POR);
289 ps2_queue(&s->common, KBD_REPLY_ACK);
293 case KBD_CMD_SCANCODE:
295 if (s->scancode_set == 1)
296 ps2_put_keycode(s, 0x43);
297 else if (s->scancode_set == 2)
298 ps2_put_keycode(s, 0x41);
299 else if (s->scancode_set == 3)
300 ps2_put_keycode(s, 0x3f);
302 if (val >= 1 && val <= 3)
303 s->scancode_set = val;
304 ps2_queue(&s->common, KBD_REPLY_ACK);
306 s->common.write_cmd = -1;
308 case KBD_CMD_SET_LEDS:
309 ps2_set_ledstate(s, val);
310 ps2_queue(&s->common, KBD_REPLY_ACK);
311 s->common.write_cmd = -1;
313 case KBD_CMD_SET_RATE:
314 ps2_queue(&s->common, KBD_REPLY_ACK);
315 s->common.write_cmd = -1;
320 /* Set the scancode translation mode.
322 1 = translated scancodes (used by qemu internally). */
324 void ps2_keyboard_set_translation(void *opaque, int mode)
326 PS2KbdState *s = (PS2KbdState *)opaque;
330 static void ps2_mouse_send_packet(PS2MouseState *s)
338 /* XXX: increase range to 8 bits ? */
347 b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
348 ps2_queue(&s->common, b);
349 ps2_queue(&s->common, dx1 & 0xff);
350 ps2_queue(&s->common, dy1 & 0xff);
351 /* extra byte for IMPS/2 or IMEX */
352 switch(s->mouse_type) {
360 ps2_queue(&s->common, dz1 & 0xff);
367 b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
368 ps2_queue(&s->common, b);
378 static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
381 static const int bmap[INPUT_BUTTON_MAX] = {
382 [INPUT_BUTTON_LEFT] = MOUSE_EVENT_LBUTTON,
383 [INPUT_BUTTON_MIDDLE] = MOUSE_EVENT_MBUTTON,
384 [INPUT_BUTTON_RIGHT] = MOUSE_EVENT_RBUTTON,
386 PS2MouseState *s = (PS2MouseState *)dev;
388 /* check if deltas are recorded when disabled */
389 if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
393 case INPUT_EVENT_KIND_REL:
394 if (evt->rel->axis == INPUT_AXIS_X) {
395 s->mouse_dx += evt->rel->value;
396 } else if (evt->rel->axis == INPUT_AXIS_Y) {
397 s->mouse_dy -= evt->rel->value;
401 case INPUT_EVENT_KIND_BTN:
402 if (evt->btn->down) {
403 s->mouse_buttons |= bmap[evt->btn->button];
404 if (evt->btn->button == INPUT_BUTTON_WHEEL_UP) {
406 } else if (evt->btn->button == INPUT_BUTTON_WHEEL_DOWN) {
410 s->mouse_buttons &= ~bmap[evt->btn->button];
420 static void ps2_mouse_sync(DeviceState *dev)
422 PS2MouseState *s = (PS2MouseState *)dev;
424 if (s->mouse_buttons) {
425 qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
427 if (!(s->mouse_status & MOUSE_STATUS_REMOTE)) {
428 while (s->common.queue.count < PS2_QUEUE_SIZE - 4) {
429 /* if not remote, send event. Multiple events are sent if
432 /* to guarantee safe serialization of input event by Munkyu Im */
433 qemu_mutex_lock(&mutex);
434 ps2_mouse_send_packet(s);
435 qemu_mutex_unlock(&mutex);
437 ps2_mouse_send_packet(s);
439 if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
445 void ps2_mouse_fake_event(void *opaque)
447 PS2MouseState *s = opaque;
449 ps2_mouse_sync(opaque);
452 void ps2_write_mouse(void *opaque, int val)
454 PS2MouseState *s = (PS2MouseState *)opaque;
456 printf("kbd: write mouse 0x%02x\n", val);
458 switch(s->common.write_cmd) {
463 if (val == AUX_RESET_WRAP) {
465 ps2_queue(&s->common, AUX_ACK);
467 } else if (val != AUX_RESET) {
468 ps2_queue(&s->common, val);
473 case AUX_SET_SCALE11:
474 s->mouse_status &= ~MOUSE_STATUS_SCALE21;
475 ps2_queue(&s->common, AUX_ACK);
477 case AUX_SET_SCALE21:
478 s->mouse_status |= MOUSE_STATUS_SCALE21;
479 ps2_queue(&s->common, AUX_ACK);
482 s->mouse_status &= ~MOUSE_STATUS_REMOTE;
483 ps2_queue(&s->common, AUX_ACK);
487 ps2_queue(&s->common, AUX_ACK);
490 s->mouse_status |= MOUSE_STATUS_REMOTE;
491 ps2_queue(&s->common, AUX_ACK);
494 ps2_queue(&s->common, AUX_ACK);
495 ps2_queue(&s->common, s->mouse_type);
499 s->common.write_cmd = val;
500 ps2_queue(&s->common, AUX_ACK);
503 ps2_queue(&s->common, AUX_ACK);
504 ps2_queue(&s->common, s->mouse_status);
505 ps2_queue(&s->common, s->mouse_resolution);
506 ps2_queue(&s->common, s->mouse_sample_rate);
509 ps2_queue(&s->common, AUX_ACK);
510 ps2_mouse_send_packet(s);
513 s->mouse_status |= MOUSE_STATUS_ENABLED;
514 ps2_queue(&s->common, AUX_ACK);
516 case AUX_DISABLE_DEV:
517 s->mouse_status &= ~MOUSE_STATUS_ENABLED;
518 ps2_queue(&s->common, AUX_ACK);
520 case AUX_SET_DEFAULT:
521 s->mouse_sample_rate = 100;
522 s->mouse_resolution = 2;
524 ps2_queue(&s->common, AUX_ACK);
527 s->mouse_sample_rate = 100;
528 s->mouse_resolution = 2;
531 ps2_queue(&s->common, AUX_ACK);
532 ps2_queue(&s->common, 0xaa);
533 ps2_queue(&s->common, s->mouse_type);
540 s->mouse_sample_rate = val;
541 /* detect IMPS/2 or IMEX */
542 switch(s->mouse_detect_state) {
546 s->mouse_detect_state = 1;
550 s->mouse_detect_state = 2;
552 s->mouse_detect_state = 3;
554 s->mouse_detect_state = 0;
558 s->mouse_type = 3; /* IMPS/2 */
559 s->mouse_detect_state = 0;
563 s->mouse_type = 4; /* IMEX */
564 s->mouse_detect_state = 0;
567 ps2_queue(&s->common, AUX_ACK);
568 s->common.write_cmd = -1;
571 s->mouse_resolution = val;
572 ps2_queue(&s->common, AUX_ACK);
573 s->common.write_cmd = -1;
578 static void ps2_common_reset(PS2State *s)
586 s->update_irq(s->update_arg, 0);
589 static void ps2_common_post_load(PS2State *s)
591 PS2Queue *q = &s->queue;
594 int tmp_data[PS2_QUEUE_SIZE];
596 /* set the useful data buffer queue size, < PS2_QUEUE_SIZE */
597 size = q->count > PS2_QUEUE_SIZE ? 0 : q->count;
599 /* move the queue elements to the start of data array */
601 for (i = 0; i < size; i++) {
602 /* move the queue elements to the temporary buffer */
603 tmp_data[i] = q->data[q->rptr];
604 if (++q->rptr == 256) {
608 memcpy(q->data, tmp_data, size);
610 /* reset rptr/wptr/count */
614 s->update_irq(s->update_arg, q->count != 0);
617 static void ps2_kbd_reset(void *opaque)
619 PS2KbdState *s = (PS2KbdState *) opaque;
621 ps2_common_reset(&s->common);
627 static void ps2_mouse_reset(void *opaque)
629 PS2MouseState *s = (PS2MouseState *) opaque;
631 ps2_common_reset(&s->common);
633 s->mouse_resolution = 0;
634 s->mouse_sample_rate = 0;
637 s->mouse_detect_state = 0;
641 s->mouse_buttons = 0;
644 static const VMStateDescription vmstate_ps2_common = {
645 .name = "PS2 Common State",
647 .minimum_version_id = 2,
648 .fields = (VMStateField[]) {
649 VMSTATE_INT32(write_cmd, PS2State),
650 VMSTATE_INT32(queue.rptr, PS2State),
651 VMSTATE_INT32(queue.wptr, PS2State),
652 VMSTATE_INT32(queue.count, PS2State),
653 VMSTATE_BUFFER(queue.data, PS2State),
654 VMSTATE_END_OF_LIST()
658 static bool ps2_keyboard_ledstate_needed(void *opaque)
660 PS2KbdState *s = opaque;
662 return s->ledstate != 0; /* 0 is default state */
665 static int ps2_kbd_ledstate_post_load(void *opaque, int version_id)
667 PS2KbdState *s = opaque;
669 kbd_put_ledstate(s->ledstate);
673 static const VMStateDescription vmstate_ps2_keyboard_ledstate = {
674 .name = "ps2kbd/ledstate",
676 .minimum_version_id = 2,
677 .post_load = ps2_kbd_ledstate_post_load,
678 .fields = (VMStateField[]) {
679 VMSTATE_INT32(ledstate, PS2KbdState),
680 VMSTATE_END_OF_LIST()
684 static int ps2_kbd_post_load(void* opaque, int version_id)
686 PS2KbdState *s = (PS2KbdState*)opaque;
687 PS2State *ps2 = &s->common;
692 ps2_common_post_load(ps2);
697 static void ps2_kbd_pre_save(void *opaque)
699 PS2KbdState *s = (PS2KbdState *)opaque;
700 PS2State *ps2 = &s->common;
702 ps2_common_post_load(ps2);
705 static const VMStateDescription vmstate_ps2_keyboard = {
708 .minimum_version_id = 2,
709 .post_load = ps2_kbd_post_load,
710 .pre_save = ps2_kbd_pre_save,
711 .fields = (VMStateField[]) {
712 VMSTATE_STRUCT(common, PS2KbdState, 0, vmstate_ps2_common, PS2State),
713 VMSTATE_INT32(scan_enabled, PS2KbdState),
714 VMSTATE_INT32(translate, PS2KbdState),
715 VMSTATE_INT32_V(scancode_set, PS2KbdState,3),
716 VMSTATE_END_OF_LIST()
718 .subsections = (VMStateSubsection []) {
720 .vmsd = &vmstate_ps2_keyboard_ledstate,
721 .needed = ps2_keyboard_ledstate_needed,
728 static int ps2_mouse_post_load(void *opaque, int version_id)
730 PS2MouseState *s = (PS2MouseState *)opaque;
731 PS2State *ps2 = &s->common;
733 ps2_common_post_load(ps2);
738 static void ps2_mouse_pre_save(void *opaque)
740 PS2MouseState *s = (PS2MouseState *)opaque;
741 PS2State *ps2 = &s->common;
743 ps2_common_post_load(ps2);
746 static const VMStateDescription vmstate_ps2_mouse = {
749 .minimum_version_id = 2,
750 .post_load = ps2_mouse_post_load,
751 .pre_save = ps2_mouse_pre_save,
752 .fields = (VMStateField[]) {
753 VMSTATE_STRUCT(common, PS2MouseState, 0, vmstate_ps2_common, PS2State),
754 VMSTATE_UINT8(mouse_status, PS2MouseState),
755 VMSTATE_UINT8(mouse_resolution, PS2MouseState),
756 VMSTATE_UINT8(mouse_sample_rate, PS2MouseState),
757 VMSTATE_UINT8(mouse_wrap, PS2MouseState),
758 VMSTATE_UINT8(mouse_type, PS2MouseState),
759 VMSTATE_UINT8(mouse_detect_state, PS2MouseState),
760 VMSTATE_INT32(mouse_dx, PS2MouseState),
761 VMSTATE_INT32(mouse_dy, PS2MouseState),
762 VMSTATE_INT32(mouse_dz, PS2MouseState),
763 VMSTATE_UINT8(mouse_buttons, PS2MouseState),
764 VMSTATE_END_OF_LIST()
768 static QemuInputHandler ps2_keyboard_handler = {
769 .name = "QEMU PS/2 Keyboard",
770 .mask = INPUT_EVENT_MASK_KEY,
771 .event = ps2_keyboard_event,
774 void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
776 PS2KbdState *s = (PS2KbdState *)g_malloc0(sizeof(PS2KbdState));
778 s->common.update_irq = update_irq;
779 s->common.update_arg = update_arg;
781 vmstate_register(NULL, 0, &vmstate_ps2_keyboard, s);
782 qemu_input_handler_register((DeviceState *)s,
783 &ps2_keyboard_handler);
784 qemu_register_reset(ps2_kbd_reset, s);
788 static QemuInputHandler ps2_mouse_handler = {
789 .name = "QEMU PS/2 Mouse",
790 .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
791 .event = ps2_mouse_event,
792 .sync = ps2_mouse_sync,
795 void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg)
797 PS2MouseState *s = (PS2MouseState *)g_malloc0(sizeof(PS2MouseState));
799 s->common.update_irq = update_irq;
800 s->common.update_arg = update_arg;
801 vmstate_register(NULL, 0, &vmstate_ps2_mouse, s);
802 qemu_input_handler_register((DeviceState *)s,
804 qemu_register_reset(ps2_mouse_reset, s);
806 /* to guarantee safe serialization of input event by Munkyu Im */
807 qemu_mutex_init(&mutex);