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
  26 #include "qemu/osdep.h"
  27 #include "ui/console.h"
  28 #include "qemu/timer.h"
  29 #include "hw/input/hid.h"
  30 #include "migration/vmstate.h"
  31 #include "trace.h"
  32
  33 #define HID_USAGE_ERROR_ROLLOVER        0x01
  34 #define HID_USAGE_POSTFAIL              0x02
  35 #define HID_USAGE_ERROR_UNDEFINED       0x03
  36
  37 /* Indices are QEMU keycodes, values are from HID Usage Table.  Indices
  38  * above 0x80 are for keys that come after 0xe0 or 0xe1+0x1d or 0xe1+0x9d.  */
  39 static const uint8_t hid_usage_keys[0x100] = {
  40     0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
  41     0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b,
  42     0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c,
  43     0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16,
  44     0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33,
  45     0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19,
  46     0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55,
  47     0xe2, 0x2c, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
  48     0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f,
  49     0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59,
  50     0x5a, 0x5b, 0x62, 0x63, 0x46, 0x00, 0x64, 0x44,
  51     0x45, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e,
  52     0xe8, 0xe9, 0x71, 0x72, 0x73, 0x00, 0x00, 0x00,
  53     0x00, 0x00, 0x00, 0x85, 0x00, 0x00, 0x00, 0x00,
  54     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  55     0x00, 0x00, 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65,
  56
  57     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  59     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  60     0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00,
  61     0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  62     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x81, 0x00,
  63     0x80, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46,
  64     0xe6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  65     0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x48, 0x4a,
  66     0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d,
  67     0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00,
  68     0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x66, 0x00,
  69     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  70     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  71     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  72     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  73 };
  74
  75 bool hid_has_events(HIDState *hs)
  76 {
  77     return hs->n > 0 || hs->idle_pending;
  78 }
  79
  80 static void hid_idle_timer(void *opaque)
  81 {
  82     HIDState *hs = opaque;
  83
  84     hs->idle_pending = true;
  85     hs->event(hs);
  86 }
  87
  88 static void hid_del_idle_timer(HIDState *hs)
  89 {
  90     if (hs->idle_timer) {
  91         timer_del(hs->idle_timer);
  92         timer_free(hs->idle_timer);
  93         hs->idle_timer = NULL;
  94     }
  95 }
  96
  97 void hid_set_next_idle(HIDState *hs)
  98 {
  99     if (hs->idle) {
 100         uint64_t expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
 101                                NANOSECONDS_PER_SECOND * hs->idle * 4 / 1000;
 102         if (!hs->idle_timer) {
 103             hs->idle_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, hid_idle_timer, hs);
 104         }
 105         timer_mod_ns(hs->idle_timer, expire_time);
 106     } else {
 107         hid_del_idle_timer(hs);
 108     }
 109 }
 110
 111 static void hid_pointer_event(DeviceState *dev, QemuConsole *src,
 112                               InputEvent *evt)
 113 {
 114     static const int bmap[INPUT_BUTTON__MAX] = {
 115         [INPUT_BUTTON_LEFT]   = 0x01,
 116         [INPUT_BUTTON_RIGHT]  = 0x02,
 117         [INPUT_BUTTON_MIDDLE] = 0x04,
 118     };
 119     HIDState *hs = (HIDState *)dev;
 120     HIDPointerEvent *e;
 121     InputMoveEvent *move;
 122     InputBtnEvent *btn;
 123
 124     assert(hs->n < QUEUE_LENGTH);
 125     e = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
 126
 127     switch (evt->type) {
 128     case INPUT_EVENT_KIND_REL:
 129         move = evt->u.rel.data;
 130         if (move->axis == INPUT_AXIS_X) {
 131             e->xdx += move->value;
 132         } else if (move->axis == INPUT_AXIS_Y) {
 133             e->ydy += move->value;
 134         }
 135         break;
 136
 137     case INPUT_EVENT_KIND_ABS:
 138         move = evt->u.abs.data;
 139         if (move->axis == INPUT_AXIS_X) {
 140             e->xdx = move->value;
 141         } else if (move->axis == INPUT_AXIS_Y) {
 142             e->ydy = move->value;
 143         }
 144         break;
 145
 146     case INPUT_EVENT_KIND_BTN:
 147         btn = evt->u.btn.data;
 148         if (btn->down) {
 149             e->buttons_state |= bmap[btn->button];
 150             if (btn->button == INPUT_BUTTON_WHEEL_UP) {
 151                 e->dz--;
 152             } else if (btn->button == INPUT_BUTTON_WHEEL_DOWN) {
 153                 e->dz++;
 154             }
 155         } else {
 156             e->buttons_state &= ~bmap[btn->button];
 157         }
 158         break;
 159
 160     default:
 161         /* keep gcc happy */
 162         break;
 163     }
 164
 165 }
 166
 167 static void hid_pointer_sync(DeviceState *dev)
 168 {
 169     HIDState *hs = (HIDState *)dev;
 170     HIDPointerEvent *prev, *curr, *next;
 171     bool event_compression = false;
 172
 173     if (hs->n == QUEUE_LENGTH-1) {
 174         /*
 175          * Queue full.  We are losing information, but we at least
 176          * keep track of most recent button state.
 177          */
 178         return;
 179     }
 180
 181     prev = &hs->ptr.queue[(hs->head + hs->n - 1) & QUEUE_MASK];
 182     curr = &hs->ptr.queue[(hs->head + hs->n) & QUEUE_MASK];
 183     next = &hs->ptr.queue[(hs->head + hs->n + 1) & QUEUE_MASK];
 184
 185     if (hs->n > 0) {
 186         /*
 187          * No button state change between previous and current event
 188          * (and previous wasn't seen by the guest yet), so there is
 189          * motion information only and we can combine the two event
 190          * into one.
 191          */
 192         if (curr->buttons_state == prev->buttons_state) {
 193             event_compression = true;
 194         }
 195     }
 196
 197     if (event_compression) {
 198         /* add current motion to previous, clear current */
 199         if (hs->kind == HID_MOUSE) {
 200             prev->xdx += curr->xdx;
 201             curr->xdx = 0;
 202             prev->ydy += curr->ydy;
 203             curr->ydy = 0;
 204         } else {
 205             prev->xdx = curr->xdx;
 206             prev->ydy = curr->ydy;
 207         }
 208         prev->dz += curr->dz;
 209         curr->dz = 0;
 210     } else {
 211         /* prepate next (clear rel, copy abs + btns) */
 212         if (hs->kind == HID_MOUSE) {
 213             next->xdx = 0;
 214             next->ydy = 0;
 215         } else {
 216             next->xdx = curr->xdx;
 217             next->ydy = curr->ydy;
 218         }
 219         next->dz = 0;
 220         next->buttons_state = curr->buttons_state;
 221         /* make current guest visible, notify guest */
 222         hs->n++;
 223         hs->event(hs);
 224     }
 225 }
 226
 227 static void hid_keyboard_event(DeviceState *dev, QemuConsole *src,
 228                                InputEvent *evt)
 229 {
 230     HIDState *hs = (HIDState *)dev;
 231     int scancodes[3], i, count;
 232     int slot;
 233     InputKeyEvent *key = evt->u.key.data;
 234
 235     count = qemu_input_key_value_to_scancode(key->key,
 236                                              key->down,
 237                                              scancodes);
 238     if (hs->n + count > QUEUE_LENGTH) {
 239         trace_hid_kbd_queue_full();
 240         return;
 241     }
 242     for (i = 0; i < count; i++) {
 243         slot = (hs->head + hs->n) & QUEUE_MASK; hs->n++;
 244         hs->kbd.keycodes[slot] = scancodes[i];
 245     }
 246     hs->event(hs);
 247 }
 248
 249 static void hid_keyboard_process_keycode(HIDState *hs)
 250 {
 251     uint8_t hid_code, index, key;
 252     int i, keycode, slot;
 253
 254     if (hs->n == 0) {
 255         return;
 256     }
 257     slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--;
 258     keycode = hs->kbd.keycodes[slot];
 259
 260     if (!hs->n) {
 261         trace_hid_kbd_queue_empty();
 262     }
 263
 264     key = keycode & 0x7f;
 265     index = key | ((hs->kbd.modifiers & (1 << 8)) >> 1);
 266     hid_code = hid_usage_keys[index];
 267     hs->kbd.modifiers &= ~(1 << 8);
 268
 269     switch (hid_code) {
 270     case 0x00:
 271         return;
 272
 273     case 0xe0:
 274         assert(key == 0x1d);
 275         if (hs->kbd.modifiers & (1 << 9)) {
 276             /* The hid_codes for the 0xe1/0x1d scancode sequence are 0xe9/0xe0.
 277              * Here we're processing the second hid_code.  By dropping bit 9
 278              * and setting bit 8, the scancode after 0x1d will access the
 279              * second half of the table.
 280              */
 281             hs->kbd.modifiers ^= (1 << 8) | (1 << 9);
 282             return;
 283         }
 284         /* fall through to process Ctrl_L */
 285     case 0xe1 ... 0xe7:
 286         /* Ctrl_L/Ctrl_R, Shift_L/Shift_R, Alt_L/Alt_R, Win_L/Win_R.
 287          * Handle releases here, or fall through to process presses.
 288          */
 289         if (keycode & (1 << 7)) {
 290             hs->kbd.modifiers &= ~(1 << (hid_code & 0x0f));
 291             return;
 292         }
 293         /* fall through */
 294     case 0xe8 ... 0xe9:
 295         /* USB modifiers are just 1 byte long.  Bits 8 and 9 of
 296          * hs->kbd.modifiers implement a state machine that detects the
 297          * 0xe0 and 0xe1/0x1d sequences.  These bits do not follow the
 298          * usual rules where bit 7 marks released keys; they are cleared
 299          * elsewhere in the function as the state machine dictates.
 300          */
 301         hs->kbd.modifiers |= 1 << (hid_code & 0x0f);
 302         return;
 303
 304     case 0xea ... 0xef:
 305         abort();
 306
 307     default:
 308         break;
 309     }
 310
 311     if (keycode & (1 << 7)) {
 312         for (i = hs->kbd.keys - 1; i >= 0; i--) {
 313             if (hs->kbd.key[i] == hid_code) {
 314                 hs->kbd.key[i] = hs->kbd.key[-- hs->kbd.keys];
 315                 hs->kbd.key[hs->kbd.keys] = 0x00;
 316                 break;
 317             }
 318         }
 319         if (i < 0) {
 320             return;
 321         }
 322     } else {
 323         for (i = hs->kbd.keys - 1; i >= 0; i--) {
 324             if (hs->kbd.key[i] == hid_code) {
 325                 break;
 326             }
 327         }
 328         if (i < 0) {
 329             if (hs->kbd.keys < sizeof(hs->kbd.key)) {
 330                 hs->kbd.key[hs->kbd.keys++] = hid_code;
 331             }
 332         } else {
 333             return;
 334         }
 335     }
 336 }
 337
 338 static inline int int_clamp(int val, int vmin, int vmax)
 339 {
 340     if (val < vmin) {
 341         return vmin;
 342     } else if (val > vmax) {
 343         return vmax;
 344     } else {
 345         return val;
 346     }
 347 }
 348
 349 void hid_pointer_activate(HIDState *hs)
 350 {
 351     if (!hs->ptr.mouse_grabbed) {
 352         qemu_input_handler_activate(hs->s);
 353         hs->ptr.mouse_grabbed = 1;
 354     }
 355 }
 356
 357 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
 358 {
 359     int dx, dy, dz, l;
 360     int index;
 361     HIDPointerEvent *e;
 362
 363     hs->idle_pending = false;
 364
 365     hid_pointer_activate(hs);
 366
 367     /* When the buffer is empty, return the last event.  Relative
 368        movements will all be zero.  */
 369     index = (hs->n ? hs->head : hs->head - 1);
 370     e = &hs->ptr.queue[index & QUEUE_MASK];
 371
 372     if (hs->kind == HID_MOUSE) {
 373         dx = int_clamp(e->xdx, -127, 127);
 374         dy = int_clamp(e->ydy, -127, 127);
 375         e->xdx -= dx;
 376         e->ydy -= dy;
 377     } else {
 378         dx = e->xdx;
 379         dy = e->ydy;
 380     }
 381     dz = int_clamp(e->dz, -127, 127);
 382     e->dz -= dz;
 383
 384     if (hs->n &&
 385         !e->dz &&
 386         (hs->kind == HID_TABLET || (!e->xdx && !e->ydy))) {
 387         /* that deals with this event */
 388         QUEUE_INCR(hs->head);
 389         hs->n--;
 390     }
 391
 392     /* Appears we have to invert the wheel direction */
 393     dz = 0 - dz;
 394     l = 0;
 395     switch (hs->kind) {
 396     case HID_MOUSE:
 397         if (len > l) {
 398             buf[l++] = e->buttons_state;
 399         }
 400         if (len > l) {
 401             buf[l++] = dx;
 402         }
 403         if (len > l) {
 404             buf[l++] = dy;
 405         }
 406         if (len > l) {
 407             buf[l++] = dz;
 408         }
 409         break;
 410
 411     case HID_TABLET:
 412         if (len > l) {
 413             buf[l++] = e->buttons_state;
 414         }
 415         if (len > l) {
 416             buf[l++] = dx & 0xff;
 417         }
 418         if (len > l) {
 419             buf[l++] = dx >> 8;
 420         }
 421         if (len > l) {
 422             buf[l++] = dy & 0xff;
 423         }
 424         if (len > l) {
 425             buf[l++] = dy >> 8;
 426         }
 427         if (len > l) {
 428             buf[l++] = dz;
 429         }
 430         break;
 431
 432     default:
 433         abort();
 434     }
 435
 436     return l;
 437 }
 438
 439 int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len)
 440 {
 441     hs->idle_pending = false;
 442
 443     if (len < 2) {
 444         return 0;
 445     }
 446
 447     hid_keyboard_process_keycode(hs);
 448
 449     buf[0] = hs->kbd.modifiers & 0xff;
 450     buf[1] = 0;
 451     if (hs->kbd.keys > 6) {
 452         memset(buf + 2, HID_USAGE_ERROR_ROLLOVER, MIN(8, len) - 2);
 453     } else {
 454         memcpy(buf + 2, hs->kbd.key, MIN(8, len) - 2);
 455     }
 456
 457     return MIN(8, len);
 458 }
 459
 460 int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len)
 461 {
 462     if (len > 0) {
 463         int ledstate = 0;
 464         /* 0x01: Num Lock LED
 465          * 0x02: Caps Lock LED
 466          * 0x04: Scroll Lock LED
 467          * 0x08: Compose LED
 468          * 0x10: Kana LED */
 469         hs->kbd.leds = buf[0];
 470         if (hs->kbd.leds & 0x04) {
 471             ledstate |= QEMU_SCROLL_LOCK_LED;
 472         }
 473         if (hs->kbd.leds & 0x01) {
 474             ledstate |= QEMU_NUM_LOCK_LED;
 475         }
 476         if (hs->kbd.leds & 0x02) {
 477             ledstate |= QEMU_CAPS_LOCK_LED;
 478         }
 479         kbd_put_ledstate(ledstate);
 480     }
 481     return 0;
 482 }
 483
 484 void hid_reset(HIDState *hs)
 485 {
 486     switch (hs->kind) {
 487     case HID_KEYBOARD:
 488         memset(hs->kbd.keycodes, 0, sizeof(hs->kbd.keycodes));
 489         memset(hs->kbd.key, 0, sizeof(hs->kbd.key));
 490         hs->kbd.keys = 0;
 491         hs->kbd.modifiers = 0;
 492         break;
 493     case HID_MOUSE:
 494     case HID_TABLET:
 495         memset(hs->ptr.queue, 0, sizeof(hs->ptr.queue));
 496         break;
 497     }
 498     hs->head = 0;
 499     hs->n = 0;
 500     hs->protocol = 1;
 501     hs->idle = 0;
 502     hs->idle_pending = false;
 503     hid_del_idle_timer(hs);
 504 }
 505
 506 void hid_free(HIDState *hs)
 507 {
 508     qemu_input_handler_unregister(hs->s);
 509     hid_del_idle_timer(hs);
 510 }
 511
 512 static QemuInputHandler hid_keyboard_handler = {
 513     .name  = "QEMU HID Keyboard",
 514     .mask  = INPUT_EVENT_MASK_KEY,
 515     .event = hid_keyboard_event,
 516 };
 517
 518 static QemuInputHandler hid_mouse_handler = {
 519     .name  = "QEMU HID Mouse",
 520     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
 521     .event = hid_pointer_event,
 522     .sync  = hid_pointer_sync,
 523 };
 524
 525 static QemuInputHandler hid_tablet_handler = {
 526     .name  = "QEMU HID Tablet",
 527     .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
 528     .event = hid_pointer_event,
 529     .sync  = hid_pointer_sync,
 530 };
 531
 532 void hid_init(HIDState *hs, int kind, HIDEventFunc event)
 533 {
 534     hs->kind = kind;
 535     hs->event = event;
 536
 537     if (hs->kind == HID_KEYBOARD) {
 538         hs->s = qemu_input_handler_register((DeviceState *)hs,
 539                                             &hid_keyboard_handler);
 540         qemu_input_handler_activate(hs->s);
 541     } else if (hs->kind == HID_MOUSE) {
 542         hs->s = qemu_input_handler_register((DeviceState *)hs,
 543                                             &hid_mouse_handler);
 544     } else if (hs->kind == HID_TABLET) {
 545         hs->s = qemu_input_handler_register((DeviceState *)hs,
 546                                             &hid_tablet_handler);
 547     }
 548 }
 549
 550 static int hid_post_load(void *opaque, int version_id)
 551 {
 552     HIDState *s = opaque;
 553
 554     hid_set_next_idle(s);
 555
 556     if (s->n == QUEUE_LENGTH && (s->kind == HID_TABLET ||
 557                                  s->kind == HID_MOUSE)) {
 558         /*
 559          * Handle ptr device migration from old qemu with full queue.
 560          *
 561          * Throw away everything but the last event, so we propagate
 562          * at least the current button state to the guest.  Also keep
 563          * current position for the tablet, signal "no motion" for the
 564          * mouse.
 565          */
 566         HIDPointerEvent evt;
 567         evt = s->ptr.queue[(s->head+s->n) & QUEUE_MASK];
 568         if (s->kind == HID_MOUSE) {
 569             evt.xdx = 0;
 570             evt.ydy = 0;
 571         }
 572         s->ptr.queue[0] = evt;
 573         s->head = 0;
 574         s->n = 1;
 575     }
 576     return 0;
 577 }
 578
 579 static const VMStateDescription vmstate_hid_ptr_queue = {
 580     .name = "HIDPointerEventQueue",
 581     .version_id = 1,
 582     .minimum_version_id = 1,
 583     .fields = (VMStateField[]) {
 584         VMSTATE_INT32(xdx, HIDPointerEvent),
 585         VMSTATE_INT32(ydy, HIDPointerEvent),
 586         VMSTATE_INT32(dz, HIDPointerEvent),
 587         VMSTATE_INT32(buttons_state, HIDPointerEvent),
 588         VMSTATE_END_OF_LIST()
 589     }
 590 };
 591
 592 const VMStateDescription vmstate_hid_ptr_device = {
 593     .name = "HIDPointerDevice",
 594     .version_id = 1,
 595     .minimum_version_id = 1,
 596     .post_load = hid_post_load,
 597     .fields = (VMStateField[]) {
 598         VMSTATE_STRUCT_ARRAY(ptr.queue, HIDState, QUEUE_LENGTH, 0,
 599                              vmstate_hid_ptr_queue, HIDPointerEvent),
 600         VMSTATE_UINT32(head, HIDState),
 601         VMSTATE_UINT32(n, HIDState),
 602         VMSTATE_INT32(protocol, HIDState),
 603         VMSTATE_UINT8(idle, HIDState),
 604         VMSTATE_END_OF_LIST(),
 605     }
 606 };
 607
 608 const VMStateDescription vmstate_hid_keyboard_device = {
 609     .name = "HIDKeyboardDevice",
 610     .version_id = 1,
 611     .minimum_version_id = 1,
 612     .post_load = hid_post_load,
 613     .fields = (VMStateField[]) {
 614         VMSTATE_UINT32_ARRAY(kbd.keycodes, HIDState, QUEUE_LENGTH),
 615         VMSTATE_UINT32(head, HIDState),
 616         VMSTATE_UINT32(n, HIDState),
 617         VMSTATE_UINT16(kbd.modifiers, HIDState),
 618         VMSTATE_UINT8(kbd.leds, HIDState),
 619         VMSTATE_UINT8_ARRAY(kbd.key, HIDState, 16),
 620         VMSTATE_INT32(kbd.keys, HIDState),
 621         VMSTATE_INT32(protocol, HIDState),
 622         VMSTATE_UINT8(idle, HIDState),
 623         VMSTATE_END_OF_LIST(),
 624     }
 625 };