hw/input/hid.c

   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 };