hw/ps2.c

   1 /*
   2  * QEMU PS/2 keyboard/mouse emulation
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  *
   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:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  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
  22  * THE SOFTWARE.
  23  */
  24 #include "hw.h"
  25 #include "ps2.h"
  26 #include "console.h"
  27 #include "sysemu.h"
  28
  29 /* debug PC keyboard */
  30 //#define DEBUG_KBD
  31
  32 /* debug PC keyboard : only mouse */
  33 //#define DEBUG_MOUSE
  34
  35 /* Keyboard Commands */
  36 #define KBD_CMD_SET_LEDS        0xED    /* Set keyboard leds */
  37 #define KBD_CMD_ECHO            0xEE
  38 #define KBD_CMD_SCANCODE        0xF0    /* Get/set scancode set */
  39 #define KBD_CMD_GET_ID          0xF2    /* get keyboard ID */
  40 #define KBD_CMD_SET_RATE        0xF3    /* Set typematic rate */
  41 #define KBD_CMD_ENABLE          0xF4    /* Enable scanning */
  42 #define KBD_CMD_RESET_DISABLE   0xF5    /* reset and disable scanning */
  43 #define KBD_CMD_RESET_ENABLE    0xF6    /* reset and enable scanning */
  44 #define KBD_CMD_RESET           0xFF    /* Reset */
  45
  46 /* Keyboard Replies */
  47 #define KBD_REPLY_POR           0xAA    /* Power on reset */
  48 #define KBD_REPLY_ID            0xAB    /* Keyboard ID */
  49 #define KBD_REPLY_ACK           0xFA    /* Command ACK */
  50 #define KBD_REPLY_RESEND        0xFE    /* Command NACK, send the cmd again */
  51
  52 /* Mouse Commands */
  53 #define AUX_SET_SCALE11         0xE6    /* Set 1:1 scaling */
  54 #define AUX_SET_SCALE21         0xE7    /* Set 2:1 scaling */
  55 #define AUX_SET_RES             0xE8    /* Set resolution */
  56 #define AUX_GET_SCALE           0xE9    /* Get scaling factor */
  57 #define AUX_SET_STREAM          0xEA    /* Set stream mode */
  58 #define AUX_POLL                0xEB    /* Poll */
  59 #define AUX_RESET_WRAP          0xEC    /* Reset wrap mode */
  60 #define AUX_SET_WRAP            0xEE    /* Set wrap mode */
  61 #define AUX_SET_REMOTE          0xF0    /* Set remote mode */
  62 #define AUX_GET_TYPE            0xF2    /* Get type */
  63 #define AUX_SET_SAMPLE          0xF3    /* Set sample rate */
  64 #define AUX_ENABLE_DEV          0xF4    /* Enable aux device */
  65 #define AUX_DISABLE_DEV         0xF5    /* Disable aux device */
  66 #define AUX_SET_DEFAULT         0xF6
  67 #define AUX_RESET               0xFF    /* Reset aux device */
  68 #define AUX_ACK                 0xFA    /* Command byte ACK. */
  69
  70 #define MOUSE_STATUS_REMOTE     0x40
  71 #define MOUSE_STATUS_ENABLED    0x20
  72 #define MOUSE_STATUS_SCALE21    0x10
  73
  74 #define PS2_QUEUE_SIZE 256
  75
  76 typedef struct {
  77     uint8_t data[PS2_QUEUE_SIZE];
  78     int rptr, wptr, count;
  79 } PS2Queue;
  80
  81 typedef struct {
  82     PS2Queue queue;
  83     int32_t write_cmd;
  84     void (*update_irq)(void *, int);
  85     void *update_arg;
  86 } PS2State;
  87
  88 typedef struct {
  89     PS2State common;
  90     int scan_enabled;
  91     /* QEMU uses translated PC scancodes internally.  To avoid multiple
  92        conversions we do the translation (if any) in the PS/2 emulation
  93        not the keyboard controller.  */
  94     int translate;
  95     int scancode_set; /* 1=XT, 2=AT, 3=PS/2 */
  96     int ledstate;
  97 } PS2KbdState;
  98
  99 typedef struct {
 100     PS2State common;
 101     uint8_t mouse_status;
 102     uint8_t mouse_resolution;
 103     uint8_t mouse_sample_rate;
 104     uint8_t mouse_wrap;
 105     uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */
 106     uint8_t mouse_detect_state;
 107     int mouse_dx; /* current values, needed for 'poll' mode */
 108     int mouse_dy;
 109     int mouse_dz;
 110     uint8_t mouse_buttons;
 111 } PS2MouseState;
 112
 113 /* Table to convert from PC scancodes to raw scancodes.  */
 114 static const unsigned char ps2_raw_keycode[128] = {
 115   0, 118,  22,  30,  38,  37,  46,  54,  61,  62,  70,  69,  78,  85, 102,  13,
 116  21,  29,  36,  45,  44,  53,  60,  67,  68,  77,  84,  91,  90,  20,  28,  27,
 117  35,  43,  52,  51,  59,  66,  75,  76,  82,  14,  18,  93,  26,  34,  33,  42,
 118  50,  49,  58,  65,  73,  74,  89, 124,  17,  41,  88,   5,   6,   4,  12,   3,
 119  11,   2,  10,   1,   9, 119, 126, 108, 117, 125, 123, 107, 115, 116, 121, 105,
 120 114, 122, 112, 113, 127,  96,  97, 120,   7,  15,  23,  31,  39,  47,  55,  63,
 121  71,  79,  86,  94,   8,  16,  24,  32,  40,  48,  56,  64,  72,  80,  87, 111,
 122  19,  25,  57,  81,  83,  92,  95,  98,  99, 100, 101, 103, 104, 106, 109, 110
 123 };
 124 static const unsigned char ps2_raw_keycode_set3[128] = {
 125   0,   8,  22,  30,  38,  37,  46,  54,  61,  62,  70,  69,  78,  85, 102,  13,
 126  21,  29,  36,  45,  44,  53,  60,  67,  68,  77,  84,  91,  90,  17,  28,  27,
 127  35,  43,  52,  51,  59,  66,  75,  76,  82,  14,  18,  92,  26,  34,  33,  42,
 128  50,  49,  58,  65,  73,  74,  89, 126,  25,  41,  20,   7,  15,  23,  31,  39,
 129  47,   2,  63,  71,  79, 118,  95, 108, 117, 125, 132, 107, 115, 116, 124, 105,
 130 114, 122, 112, 113, 127,  96,  97,  86,  94,  15,  23,  31,  39,  47,  55,  63,
 131  71,  79,  86,  94,   8,  16,  24,  32,  40,  48,  56,  64,  72,  80,  87, 111,
 132  19,  25,  57,  81,  83,  92,  95,  98,  99, 100, 101, 103, 104, 106, 109, 110
 133 };
 134
 135 void ps2_queue(void *opaque, int b)
 136 {
 137     PS2State *s = (PS2State *)opaque;
 138     PS2Queue *q = &s->queue;
 139
 140     if (q->count >= PS2_QUEUE_SIZE)
 141         return;
 142     q->data[q->wptr] = b;
 143     if (++q->wptr == PS2_QUEUE_SIZE)
 144         q->wptr = 0;
 145     q->count++;
 146     s->update_irq(s->update_arg, 1);
 147 }
 148
 149 /*
 150    keycode is expressed as follow:
 151    bit 7    - 0 key pressed, 1 = key released
 152    bits 6-0 - translated scancode set 2
 153  */
 154 static void ps2_put_keycode(void *opaque, int keycode)
 155 {
 156     PS2KbdState *s = opaque;
 157
 158     qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 159     /* XXX: add support for scancode set 1 */
 160     if (!s->translate && keycode < 0xe0 && s->scancode_set > 1) {
 161         if (keycode & 0x80) {
 162             ps2_queue(&s->common, 0xf0);
 163         }
 164         if (s->scancode_set == 2) {
 165             keycode = ps2_raw_keycode[keycode & 0x7f];
 166         } else if (s->scancode_set == 3) {
 167             keycode = ps2_raw_keycode_set3[keycode & 0x7f];
 168         }
 169       }
 170     ps2_queue(&s->common, keycode);
 171 }
 172
 173 uint32_t ps2_read_data(void *opaque)
 174 {
 175     PS2State *s = (PS2State *)opaque;
 176     PS2Queue *q;
 177     int val, index;
 178
 179     q = &s->queue;
 180     if (q->count == 0) {
 181         /* NOTE: if no data left, we return the last keyboard one
 182            (needed for EMM386) */
 183         /* XXX: need a timer to do things correctly */
 184         index = q->rptr - 1;
 185         if (index < 0)
 186             index = PS2_QUEUE_SIZE - 1;
 187         val = q->data[index];
 188     } else {
 189         val = q->data[q->rptr];
 190         if (++q->rptr == PS2_QUEUE_SIZE)
 191             q->rptr = 0;
 192         q->count--;
 193         /* reading deasserts IRQ */
 194         s->update_irq(s->update_arg, 0);
 195         /* reassert IRQs if data left */
 196         s->update_irq(s->update_arg, q->count != 0);
 197     }
 198     return val;
 199 }
 200
 201 static void ps2_set_ledstate(PS2KbdState *s, int ledstate)
 202 {
 203     s->ledstate = ledstate;
 204     kbd_put_ledstate(ledstate);
 205 }
 206
 207 static void ps2_reset_keyboard(PS2KbdState *s)
 208 {
 209     s->scan_enabled = 1;
 210     s->scancode_set = 2;
 211     ps2_set_ledstate(s, 0);
 212 }
 213
 214 void ps2_write_keyboard(void *opaque, int val)
 215 {
 216     PS2KbdState *s = (PS2KbdState *)opaque;
 217
 218     switch(s->common.write_cmd) {
 219     default:
 220     case -1:
 221         switch(val) {
 222         case 0x00:
 223             ps2_queue(&s->common, KBD_REPLY_ACK);
 224             break;
 225         case 0x05:
 226             ps2_queue(&s->common, KBD_REPLY_RESEND);
 227             break;
 228         case KBD_CMD_GET_ID:
 229             ps2_queue(&s->common, KBD_REPLY_ACK);
 230             /* We emulate a MF2 AT keyboard here */
 231             ps2_queue(&s->common, KBD_REPLY_ID);
 232             if (s->translate)
 233                 ps2_queue(&s->common, 0x41);
 234             else
 235                 ps2_queue(&s->common, 0x83);
 236             break;
 237         case KBD_CMD_ECHO:
 238             ps2_queue(&s->common, KBD_CMD_ECHO);
 239             break;
 240         case KBD_CMD_ENABLE:
 241             s->scan_enabled = 1;
 242             ps2_queue(&s->common, KBD_REPLY_ACK);
 243             break;
 244         case KBD_CMD_SCANCODE:
 245         case KBD_CMD_SET_LEDS:
 246         case KBD_CMD_SET_RATE:
 247             s->common.write_cmd = val;
 248             ps2_queue(&s->common, KBD_REPLY_ACK);
 249             break;
 250         case KBD_CMD_RESET_DISABLE:
 251             ps2_reset_keyboard(s);
 252             s->scan_enabled = 0;
 253             ps2_queue(&s->common, KBD_REPLY_ACK);
 254             break;
 255         case KBD_CMD_RESET_ENABLE:
 256             ps2_reset_keyboard(s);
 257             s->scan_enabled = 1;
 258             ps2_queue(&s->common, KBD_REPLY_ACK);
 259             break;
 260         case KBD_CMD_RESET:
 261             ps2_reset_keyboard(s);
 262             ps2_queue(&s->common, KBD_REPLY_ACK);
 263             ps2_queue(&s->common, KBD_REPLY_POR);
 264             break;
 265         default:
 266             ps2_queue(&s->common, KBD_REPLY_ACK);
 267             break;
 268         }
 269         break;
 270     case KBD_CMD_SCANCODE:
 271         if (val == 0) {
 272             if (s->scancode_set == 1)
 273                 ps2_put_keycode(s, 0x43);
 274             else if (s->scancode_set == 2)
 275                 ps2_put_keycode(s, 0x41);
 276             else if (s->scancode_set == 3)
 277                 ps2_put_keycode(s, 0x3f);
 278         } else {
 279             if (val >= 1 && val <= 3)
 280                 s->scancode_set = val;
 281             ps2_queue(&s->common, KBD_REPLY_ACK);
 282         }
 283         s->common.write_cmd = -1;
 284         break;
 285     case KBD_CMD_SET_LEDS:
 286         ps2_set_ledstate(s, val);
 287         ps2_queue(&s->common, KBD_REPLY_ACK);
 288         s->common.write_cmd = -1;
 289         break;
 290     case KBD_CMD_SET_RATE:
 291         ps2_queue(&s->common, KBD_REPLY_ACK);
 292         s->common.write_cmd = -1;
 293         break;
 294     }
 295 }
 296
 297 /* Set the scancode translation mode.
 298    0 = raw scancodes.
 299    1 = translated scancodes (used by qemu internally).  */
 300
 301 void ps2_keyboard_set_translation(void *opaque, int mode)
 302 {
 303     PS2KbdState *s = (PS2KbdState *)opaque;
 304     s->translate = mode;
 305 }
 306
 307 static void ps2_mouse_send_packet(PS2MouseState *s)
 308 {
 309     unsigned int b;
 310     int dx1, dy1, dz1;
 311
 312     dx1 = s->mouse_dx;
 313     dy1 = s->mouse_dy;
 314     dz1 = s->mouse_dz;
 315     /* XXX: increase range to 8 bits ? */
 316     if (dx1 > 127)
 317         dx1 = 127;
 318     else if (dx1 < -127)
 319         dx1 = -127;
 320     if (dy1 > 127)
 321         dy1 = 127;
 322     else if (dy1 < -127)
 323         dy1 = -127;
 324     b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07);
 325     ps2_queue(&s->common, b);
 326     ps2_queue(&s->common, dx1 & 0xff);
 327     ps2_queue(&s->common, dy1 & 0xff);
 328     /* extra byte for IMPS/2 or IMEX */
 329     switch(s->mouse_type) {
 330     default:
 331         break;
 332     case 3:
 333         if (dz1 > 127)
 334             dz1 = 127;
 335         else if (dz1 < -127)
 336                 dz1 = -127;
 337         ps2_queue(&s->common, dz1 & 0xff);
 338         break;
 339     case 4:
 340         if (dz1 > 7)
 341             dz1 = 7;
 342         else if (dz1 < -7)
 343             dz1 = -7;
 344         b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1);
 345         ps2_queue(&s->common, b);
 346         break;
 347     }
 348
 349     /* update deltas */
 350     s->mouse_dx -= dx1;
 351     s->mouse_dy -= dy1;
 352     s->mouse_dz -= dz1;
 353 }
 354
 355 static void ps2_mouse_event(void *opaque,
 356                             int dx, int dy, int dz, int buttons_state)
 357 {
 358     PS2MouseState *s = opaque;
 359
 360     /* check if deltas are recorded when disabled */
 361     if (!(s->mouse_status & MOUSE_STATUS_ENABLED))
 362         return;
 363
 364     s->mouse_dx += dx;
 365     s->mouse_dy -= dy;
 366     s->mouse_dz += dz;
 367     /* XXX: SDL sometimes generates nul events: we delete them */
 368     if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0 &&
 369         s->mouse_buttons == buttons_state)
 370         return;
 371     s->mouse_buttons = buttons_state;
 372
 373     if (buttons_state) {
 374         qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
 375     }
 376
 377     if (!(s->mouse_status & MOUSE_STATUS_REMOTE) &&
 378         (s->common.queue.count < (PS2_QUEUE_SIZE - 16))) {
 379         for(;;) {
 380             /* if not remote, send event. Multiple events are sent if
 381                too big deltas */
 382             ps2_mouse_send_packet(s);
 383             if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0)
 384                 break;
 385         }
 386     }
 387 }
 388
 389 void ps2_mouse_fake_event(void *opaque)
 390 {
 391     ps2_mouse_event(opaque, 1, 0, 0, 0);
 392 }
 393
 394 void ps2_write_mouse(void *opaque, int val)
 395 {
 396     PS2MouseState *s = (PS2MouseState *)opaque;
 397 #ifdef DEBUG_MOUSE
 398     printf("kbd: write mouse 0x%02x\n", val);
 399 #endif
 400     switch(s->common.write_cmd) {
 401     default:
 402     case -1:
 403         /* mouse command */
 404         if (s->mouse_wrap) {
 405             if (val == AUX_RESET_WRAP) {
 406                 s->mouse_wrap = 0;
 407                 ps2_queue(&s->common, AUX_ACK);
 408                 return;
 409             } else if (val != AUX_RESET) {
 410                 ps2_queue(&s->common, val);
 411                 return;
 412             }
 413         }
 414         switch(val) {
 415         case AUX_SET_SCALE11:
 416             s->mouse_status &= ~MOUSE_STATUS_SCALE21;
 417             ps2_queue(&s->common, AUX_ACK);
 418             break;
 419         case AUX_SET_SCALE21:
 420             s->mouse_status |= MOUSE_STATUS_SCALE21;
 421             ps2_queue(&s->common, AUX_ACK);
 422             break;
 423         case AUX_SET_STREAM:
 424             s->mouse_status &= ~MOUSE_STATUS_REMOTE;
 425             ps2_queue(&s->common, AUX_ACK);
 426             break;
 427         case AUX_SET_WRAP:
 428             s->mouse_wrap = 1;
 429             ps2_queue(&s->common, AUX_ACK);
 430             break;
 431         case AUX_SET_REMOTE:
 432             s->mouse_status |= MOUSE_STATUS_REMOTE;
 433             ps2_queue(&s->common, AUX_ACK);
 434             break;
 435         case AUX_GET_TYPE:
 436             ps2_queue(&s->common, AUX_ACK);
 437             ps2_queue(&s->common, s->mouse_type);
 438             break;
 439         case AUX_SET_RES:
 440         case AUX_SET_SAMPLE:
 441             s->common.write_cmd = val;
 442             ps2_queue(&s->common, AUX_ACK);
 443             break;
 444         case AUX_GET_SCALE:
 445             ps2_queue(&s->common, AUX_ACK);
 446             ps2_queue(&s->common, s->mouse_status);
 447             ps2_queue(&s->common, s->mouse_resolution);
 448             ps2_queue(&s->common, s->mouse_sample_rate);
 449             break;
 450         case AUX_POLL:
 451             ps2_queue(&s->common, AUX_ACK);
 452             ps2_mouse_send_packet(s);
 453             break;
 454         case AUX_ENABLE_DEV:
 455             s->mouse_status |= MOUSE_STATUS_ENABLED;
 456             ps2_queue(&s->common, AUX_ACK);
 457             break;
 458         case AUX_DISABLE_DEV:
 459             s->mouse_status &= ~MOUSE_STATUS_ENABLED;
 460             ps2_queue(&s->common, AUX_ACK);
 461             break;
 462         case AUX_SET_DEFAULT:
 463             s->mouse_sample_rate = 100;
 464             s->mouse_resolution = 2;
 465             s->mouse_status = 0;
 466             ps2_queue(&s->common, AUX_ACK);
 467             break;
 468         case AUX_RESET:
 469             s->mouse_sample_rate = 100;
 470             s->mouse_resolution = 2;
 471             s->mouse_status = 0;
 472             s->mouse_type = 0;
 473             ps2_queue(&s->common, AUX_ACK);
 474             ps2_queue(&s->common, 0xaa);
 475             ps2_queue(&s->common, s->mouse_type);
 476             break;
 477         default:
 478             break;
 479         }
 480         break;
 481     case AUX_SET_SAMPLE:
 482         s->mouse_sample_rate = val;
 483         /* detect IMPS/2 or IMEX */
 484         switch(s->mouse_detect_state) {
 485         default:
 486         case 0:
 487             if (val == 200)
 488                 s->mouse_detect_state = 1;
 489             break;
 490         case 1:
 491             if (val == 100)
 492                 s->mouse_detect_state = 2;
 493             else if (val == 200)
 494                 s->mouse_detect_state = 3;
 495             else
 496                 s->mouse_detect_state = 0;
 497             break;
 498         case 2:
 499             if (val == 80)
 500                 s->mouse_type = 3; /* IMPS/2 */
 501             s->mouse_detect_state = 0;
 502             break;
 503         case 3:
 504             if (val == 80)
 505                 s->mouse_type = 4; /* IMEX */
 506             s->mouse_detect_state = 0;
 507             break;
 508         }
 509         ps2_queue(&s->common, AUX_ACK);
 510         s->common.write_cmd = -1;
 511         break;
 512     case AUX_SET_RES:
 513         s->mouse_resolution = val;
 514         ps2_queue(&s->common, AUX_ACK);
 515         s->common.write_cmd = -1;
 516         break;
 517     }
 518 }
 519
 520 static void ps2_common_reset(PS2State *s)
 521 {
 522     PS2Queue *q;
 523     s->write_cmd = -1;
 524     q = &s->queue;
 525     q->rptr = 0;
 526     q->wptr = 0;
 527     q->count = 0;
 528     s->update_irq(s->update_arg, 0);
 529 }
 530
 531 static void ps2_kbd_reset(void *opaque)
 532 {
 533     PS2KbdState *s = (PS2KbdState *) opaque;
 534
 535     ps2_common_reset(&s->common);
 536     s->scan_enabled = 0;
 537     s->translate = 0;
 538     s->scancode_set = 0;
 539 }
 540
 541 static void ps2_mouse_reset(void *opaque)
 542 {
 543     PS2MouseState *s = (PS2MouseState *) opaque;
 544
 545     ps2_common_reset(&s->common);
 546     s->mouse_status = 0;
 547     s->mouse_resolution = 0;
 548     s->mouse_sample_rate = 0;
 549     s->mouse_wrap = 0;
 550     s->mouse_type = 0;
 551     s->mouse_detect_state = 0;
 552     s->mouse_dx = 0;
 553     s->mouse_dy = 0;
 554     s->mouse_dz = 0;
 555     s->mouse_buttons = 0;
 556 }
 557
 558 static const VMStateDescription vmstate_ps2_common = {
 559     .name = "PS2 Common State",
 560     .version_id = 3,
 561     .minimum_version_id = 2,
 562     .minimum_version_id_old = 2,
 563     .fields      = (VMStateField []) {
 564         VMSTATE_INT32(write_cmd, PS2State),
 565         VMSTATE_INT32(queue.rptr, PS2State),
 566         VMSTATE_INT32(queue.wptr, PS2State),
 567         VMSTATE_INT32(queue.count, PS2State),
 568         VMSTATE_BUFFER(queue.data, PS2State),
 569         VMSTATE_END_OF_LIST()
 570     }
 571 };
 572
 573 static bool ps2_keyboard_ledstate_needed(void *opaque)
 574 {
 575     PS2KbdState *s = opaque;
 576
 577     return s->ledstate != 0; /* 0 is default state */
 578 }
 579
 580 static int ps2_kbd_ledstate_post_load(void *opaque, int version_id)
 581 {
 582     PS2KbdState *s = opaque;
 583
 584     kbd_put_ledstate(s->ledstate);
 585     return 0;
 586 }
 587
 588 static const VMStateDescription vmstate_ps2_keyboard_ledstate = {
 589     .name = "ps2kbd/ledstate",
 590     .version_id = 3,
 591     .minimum_version_id = 2,
 592     .minimum_version_id_old = 2,
 593     .post_load = ps2_kbd_ledstate_post_load,
 594     .fields      = (VMStateField []) {
 595         VMSTATE_INT32(ledstate, PS2KbdState),
 596         VMSTATE_END_OF_LIST()
 597     }
 598 };
 599
 600 static int ps2_kbd_post_load(void* opaque, int version_id)
 601 {
 602     PS2KbdState *s = (PS2KbdState*)opaque;
 603
 604     if (version_id == 2)
 605         s->scancode_set=2;
 606     return 0;
 607 }
 608
 609 static const VMStateDescription vmstate_ps2_keyboard = {
 610     .name = "ps2kbd",
 611     .version_id = 3,
 612     .minimum_version_id = 2,
 613     .minimum_version_id_old = 2,
 614     .post_load = ps2_kbd_post_load,
 615     .fields      = (VMStateField []) {
 616         VMSTATE_STRUCT(common, PS2KbdState, 0, vmstate_ps2_common, PS2State),
 617         VMSTATE_INT32(scan_enabled, PS2KbdState),
 618         VMSTATE_INT32(translate, PS2KbdState),
 619         VMSTATE_INT32_V(scancode_set, PS2KbdState,3),
 620         VMSTATE_END_OF_LIST()
 621     },
 622     .subsections = (VMStateSubsection []) {
 623         {
 624             .vmsd = &vmstate_ps2_keyboard_ledstate,
 625             .needed = ps2_keyboard_ledstate_needed,
 626         }, {
 627             /* empty */
 628         }
 629     }
 630 };
 631
 632 static const VMStateDescription vmstate_ps2_mouse = {
 633     .name = "ps2mouse",
 634     .version_id = 2,
 635     .minimum_version_id = 2,
 636     .minimum_version_id_old = 2,
 637     .fields      = (VMStateField []) {
 638         VMSTATE_STRUCT(common, PS2MouseState, 0, vmstate_ps2_common, PS2State),
 639         VMSTATE_UINT8(mouse_status, PS2MouseState),
 640         VMSTATE_UINT8(mouse_resolution, PS2MouseState),
 641         VMSTATE_UINT8(mouse_sample_rate, PS2MouseState),
 642         VMSTATE_UINT8(mouse_wrap, PS2MouseState),
 643         VMSTATE_UINT8(mouse_type, PS2MouseState),
 644         VMSTATE_UINT8(mouse_detect_state, PS2MouseState),
 645         VMSTATE_INT32(mouse_dx, PS2MouseState),
 646         VMSTATE_INT32(mouse_dy, PS2MouseState),
 647         VMSTATE_INT32(mouse_dz, PS2MouseState),
 648         VMSTATE_UINT8(mouse_buttons, PS2MouseState),
 649         VMSTATE_END_OF_LIST()
 650     }
 651 };
 652
 653 void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg)
 654 {
 655     PS2KbdState *s = (PS2KbdState *)g_malloc0(sizeof(PS2KbdState));
 656
 657     s->common.update_irq = update_irq;
 658     s->common.update_arg = update_arg;
 659     s->scancode_set = 2;
 660     vmstate_register(NULL, 0, &vmstate_ps2_keyboard, s);
 661     qemu_add_kbd_event_handler(ps2_put_keycode, s);
 662     qemu_register_reset(ps2_kbd_reset, s);
 663     return s;
 664 }
 665
 666 void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg)
 667 {
 668     PS2MouseState *s = (PS2MouseState *)g_malloc0(sizeof(PS2MouseState));
 669
 670     s->common.update_irq = update_irq;
 671     s->common.update_arg = update_arg;
 672     vmstate_register(NULL, 0, &vmstate_ps2_mouse, s);
 673     qemu_add_mouse_event_handler(ps2_mouse_event, s, 0, "QEMU PS/2 Mouse");
 674     qemu_register_reset(ps2_mouse_reset, s);
 675     return s;
 676 }