hw/input/pckbd.c

   1 /*
   2  * QEMU PC keyboard 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 "qemu/osdep.h"
  25 #include "hw/hw.h"
  26 #include "hw/isa/isa.h"
  27 #include "hw/i386/pc.h"
  28 #include "hw/input/ps2.h"
  29 #include "sysemu/sysemu.h"
  30
  31 /* debug PC keyboard */
  32 //#define DEBUG_KBD
  33 #ifdef DEBUG_KBD
  34 #define DPRINTF(fmt, ...)                                       \
  35     do { printf("KBD: " fmt , ## __VA_ARGS__); } while (0)
  36 #else
  37 #define DPRINTF(fmt, ...)
  38 #endif
  39
  40 /*      Keyboard Controller Commands */
  41 #define KBD_CCMD_READ_MODE      0x20    /* Read mode bits */
  42 #define KBD_CCMD_WRITE_MODE     0x60    /* Write mode bits */
  43 #define KBD_CCMD_GET_VERSION    0xA1    /* Get controller version */
  44 #define KBD_CCMD_MOUSE_DISABLE  0xA7    /* Disable mouse interface */
  45 #define KBD_CCMD_MOUSE_ENABLE   0xA8    /* Enable mouse interface */
  46 #define KBD_CCMD_TEST_MOUSE     0xA9    /* Mouse interface test */
  47 #define KBD_CCMD_SELF_TEST      0xAA    /* Controller self test */
  48 #define KBD_CCMD_KBD_TEST       0xAB    /* Keyboard interface test */
  49 #define KBD_CCMD_KBD_DISABLE    0xAD    /* Keyboard interface disable */
  50 #define KBD_CCMD_KBD_ENABLE     0xAE    /* Keyboard interface enable */
  51 #define KBD_CCMD_READ_INPORT    0xC0    /* read input port */
  52 #define KBD_CCMD_READ_OUTPORT   0xD0    /* read output port */
  53 #define KBD_CCMD_WRITE_OUTPORT  0xD1    /* write output port */
  54 #define KBD_CCMD_WRITE_OBUF     0xD2
  55 #define KBD_CCMD_WRITE_AUX_OBUF 0xD3    /* Write to output buffer as if
  56                                            initiated by the auxiliary device */
  57 #define KBD_CCMD_WRITE_MOUSE    0xD4    /* Write the following byte to the mouse */
  58 #define KBD_CCMD_DISABLE_A20    0xDD    /* HP vectra only ? */
  59 #define KBD_CCMD_ENABLE_A20     0xDF    /* HP vectra only ? */
  60 #define KBD_CCMD_PULSE_BITS_3_0 0xF0    /* Pulse bits 3-0 of the output port P2. */
  61 #define KBD_CCMD_RESET          0xFE    /* Pulse bit 0 of the output port P2 = CPU reset. */
  62 #define KBD_CCMD_NO_OP          0xFF    /* Pulse no bits of the output port P2. */
  63
  64 /* Keyboard Commands */
  65 #define KBD_CMD_SET_LEDS        0xED    /* Set keyboard leds */
  66 #define KBD_CMD_ECHO            0xEE
  67 #define KBD_CMD_GET_ID          0xF2    /* get keyboard ID */
  68 #define KBD_CMD_SET_RATE        0xF3    /* Set typematic rate */
  69 #define KBD_CMD_ENABLE          0xF4    /* Enable scanning */
  70 #define KBD_CMD_RESET_DISABLE   0xF5    /* reset and disable scanning */
  71 #define KBD_CMD_RESET_ENABLE    0xF6    /* reset and enable scanning */
  72 #define KBD_CMD_RESET           0xFF    /* Reset */
  73
  74 /* Keyboard Replies */
  75 #define KBD_REPLY_POR           0xAA    /* Power on reset */
  76 #define KBD_REPLY_ACK           0xFA    /* Command ACK */
  77 #define KBD_REPLY_RESEND        0xFE    /* Command NACK, send the cmd again */
  78
  79 /* Status Register Bits */
  80 #define KBD_STAT_OBF            0x01    /* Keyboard output buffer full */
  81 #define KBD_STAT_IBF            0x02    /* Keyboard input buffer full */
  82 #define KBD_STAT_SELFTEST       0x04    /* Self test successful */
  83 #define KBD_STAT_CMD            0x08    /* Last write was a command write (0=data) */
  84 #define KBD_STAT_UNLOCKED       0x10    /* Zero if keyboard locked */
  85 #define KBD_STAT_MOUSE_OBF      0x20    /* Mouse output buffer full */
  86 #define KBD_STAT_GTO            0x40    /* General receive/xmit timeout */
  87 #define KBD_STAT_PERR           0x80    /* Parity error */
  88
  89 /* Controller Mode Register Bits */
  90 #define KBD_MODE_KBD_INT        0x01    /* Keyboard data generate IRQ1 */
  91 #define KBD_MODE_MOUSE_INT      0x02    /* Mouse data generate IRQ12 */
  92 #define KBD_MODE_SYS            0x04    /* The system flag (?) */
  93 #define KBD_MODE_NO_KEYLOCK     0x08    /* The keylock doesn't affect the keyboard if set */
  94 #define KBD_MODE_DISABLE_KBD    0x10    /* Disable keyboard interface */
  95 #define KBD_MODE_DISABLE_MOUSE  0x20    /* Disable mouse interface */
  96 #define KBD_MODE_KCC            0x40    /* Scan code conversion to PC format */
  97 #define KBD_MODE_RFU            0x80
  98
  99 /* Output Port Bits */
 100 #define KBD_OUT_RESET           0x01    /* 1=normal mode, 0=reset */
 101 #define KBD_OUT_A20             0x02    /* x86 only */
 102 #define KBD_OUT_OBF             0x10    /* Keyboard output buffer full */
 103 #define KBD_OUT_MOUSE_OBF       0x20    /* Mouse output buffer full */
 104
 105 /* OSes typically write 0xdd/0xdf to turn the A20 line off and on.
 106  * We make the default value of the outport include these four bits,
 107  * so that the subsection is rarely necessary.
 108  */
 109 #define KBD_OUT_ONES            0xcc
 110
 111 /* Mouse Commands */
 112 #define AUX_SET_SCALE11         0xE6    /* Set 1:1 scaling */
 113 #define AUX_SET_SCALE21         0xE7    /* Set 2:1 scaling */
 114 #define AUX_SET_RES             0xE8    /* Set resolution */
 115 #define AUX_GET_SCALE           0xE9    /* Get scaling factor */
 116 #define AUX_SET_STREAM          0xEA    /* Set stream mode */
 117 #define AUX_POLL                0xEB    /* Poll */
 118 #define AUX_RESET_WRAP          0xEC    /* Reset wrap mode */
 119 #define AUX_SET_WRAP            0xEE    /* Set wrap mode */
 120 #define AUX_SET_REMOTE          0xF0    /* Set remote mode */
 121 #define AUX_GET_TYPE            0xF2    /* Get type */
 122 #define AUX_SET_SAMPLE          0xF3    /* Set sample rate */
 123 #define AUX_ENABLE_DEV          0xF4    /* Enable aux device */
 124 #define AUX_DISABLE_DEV         0xF5    /* Disable aux device */
 125 #define AUX_SET_DEFAULT         0xF6
 126 #define AUX_RESET               0xFF    /* Reset aux device */
 127 #define AUX_ACK                 0xFA    /* Command byte ACK. */
 128
 129 #define MOUSE_STATUS_REMOTE     0x40
 130 #define MOUSE_STATUS_ENABLED    0x20
 131 #define MOUSE_STATUS_SCALE21    0x10
 132
 133 #define KBD_PENDING_KBD         1
 134 #define KBD_PENDING_AUX         2
 135
 136 typedef struct KBDState {
 137     uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
 138     uint8_t status;
 139     uint8_t mode;
 140     uint8_t outport;
 141     bool outport_present;
 142     /* Bitmask of devices with data available.  */
 143     uint8_t pending;
 144     void *kbd;
 145     void *mouse;
 146
 147     qemu_irq irq_kbd;
 148     qemu_irq irq_mouse;
 149     qemu_irq a20_out;
 150     hwaddr mask;
 151 } KBDState;
 152
 153 /* update irq and KBD_STAT_[MOUSE_]OBF */
 154 /* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
 155    incorrect, but it avoids having to simulate exact delays */
 156 static void kbd_update_irq(KBDState *s)
 157 {
 158     int irq_kbd_level, irq_mouse_level;
 159
 160     irq_kbd_level = 0;
 161     irq_mouse_level = 0;
 162     s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
 163     s->outport &= ~(KBD_OUT_OBF | KBD_OUT_MOUSE_OBF);
 164     if (s->pending) {
 165         s->status |= KBD_STAT_OBF;
 166         s->outport |= KBD_OUT_OBF;
 167         /* kbd data takes priority over aux data.  */
 168         if (s->pending == KBD_PENDING_AUX) {
 169             s->status |= KBD_STAT_MOUSE_OBF;
 170             s->outport |= KBD_OUT_MOUSE_OBF;
 171             if (s->mode & KBD_MODE_MOUSE_INT)
 172                 irq_mouse_level = 1;
 173         } else {
 174             if ((s->mode & KBD_MODE_KBD_INT) &&
 175                 !(s->mode & KBD_MODE_DISABLE_KBD))
 176                 irq_kbd_level = 1;
 177         }
 178     }
 179     qemu_set_irq(s->irq_kbd, irq_kbd_level);
 180     qemu_set_irq(s->irq_mouse, irq_mouse_level);
 181 }
 182
 183 static void kbd_update_kbd_irq(void *opaque, int level)
 184 {
 185     KBDState *s = (KBDState *)opaque;
 186
 187     if (level)
 188         s->pending |= KBD_PENDING_KBD;
 189     else
 190         s->pending &= ~KBD_PENDING_KBD;
 191     kbd_update_irq(s);
 192 }
 193
 194 static void kbd_update_aux_irq(void *opaque, int level)
 195 {
 196     KBDState *s = (KBDState *)opaque;
 197
 198     if (level)
 199         s->pending |= KBD_PENDING_AUX;
 200     else
 201         s->pending &= ~KBD_PENDING_AUX;
 202     kbd_update_irq(s);
 203 }
 204
 205 static uint64_t kbd_read_status(void *opaque, hwaddr addr,
 206                                 unsigned size)
 207 {
 208     KBDState *s = opaque;
 209     int val;
 210     val = s->status;
 211     DPRINTF("kbd: read status=0x%02x\n", val);
 212     return val;
 213 }
 214
 215 static void kbd_queue(KBDState *s, int b, int aux)
 216 {
 217     if (aux)
 218         ps2_queue(s->mouse, b);
 219     else
 220         ps2_queue(s->kbd, b);
 221 }
 222
 223 static void outport_write(KBDState *s, uint32_t val)
 224 {
 225     DPRINTF("kbd: write outport=0x%02x\n", val);
 226     s->outport = val;
 227     qemu_set_irq(s->a20_out, (val >> 1) & 1);
 228     if (!(val & 1)) {
 229         qemu_system_reset_request();
 230     }
 231 }
 232
 233 static void kbd_write_command(void *opaque, hwaddr addr,
 234                               uint64_t val, unsigned size)
 235 {
 236     KBDState *s = opaque;
 237
 238     DPRINTF("kbd: write cmd=0x%02" PRIx64 "\n", val);
 239
 240     /* Bits 3-0 of the output port P2 of the keyboard controller may be pulsed
 241      * low for approximately 6 micro seconds. Bits 3-0 of the KBD_CCMD_PULSE
 242      * command specify the output port bits to be pulsed.
 243      * 0: Bit should be pulsed. 1: Bit should not be modified.
 244      * The only useful version of this command is pulsing bit 0,
 245      * which does a CPU reset.
 246      */
 247     if((val & KBD_CCMD_PULSE_BITS_3_0) == KBD_CCMD_PULSE_BITS_3_0) {
 248         if(!(val & 1))
 249             val = KBD_CCMD_RESET;
 250         else
 251             val = KBD_CCMD_NO_OP;
 252     }
 253
 254     switch(val) {
 255     case KBD_CCMD_READ_MODE:
 256         kbd_queue(s, s->mode, 0);
 257         break;
 258     case KBD_CCMD_WRITE_MODE:
 259     case KBD_CCMD_WRITE_OBUF:
 260     case KBD_CCMD_WRITE_AUX_OBUF:
 261     case KBD_CCMD_WRITE_MOUSE:
 262     case KBD_CCMD_WRITE_OUTPORT:
 263         s->write_cmd = val;
 264         break;
 265     case KBD_CCMD_MOUSE_DISABLE:
 266         s->mode |= KBD_MODE_DISABLE_MOUSE;
 267         break;
 268     case KBD_CCMD_MOUSE_ENABLE:
 269         s->mode &= ~KBD_MODE_DISABLE_MOUSE;
 270         break;
 271     case KBD_CCMD_TEST_MOUSE:
 272         kbd_queue(s, 0x00, 0);
 273         break;
 274     case KBD_CCMD_SELF_TEST:
 275         s->status |= KBD_STAT_SELFTEST;
 276         kbd_queue(s, 0x55, 0);
 277         break;
 278     case KBD_CCMD_KBD_TEST:
 279         kbd_queue(s, 0x00, 0);
 280         break;
 281     case KBD_CCMD_KBD_DISABLE:
 282         s->mode |= KBD_MODE_DISABLE_KBD;
 283         kbd_update_irq(s);
 284         break;
 285     case KBD_CCMD_KBD_ENABLE:
 286         s->mode &= ~KBD_MODE_DISABLE_KBD;
 287         kbd_update_irq(s);
 288         break;
 289     case KBD_CCMD_READ_INPORT:
 290         kbd_queue(s, 0x80, 0);
 291         break;
 292     case KBD_CCMD_READ_OUTPORT:
 293         kbd_queue(s, s->outport, 0);
 294         break;
 295     case KBD_CCMD_ENABLE_A20:
 296         qemu_irq_raise(s->a20_out);
 297         s->outport |= KBD_OUT_A20;
 298         break;
 299     case KBD_CCMD_DISABLE_A20:
 300         qemu_irq_lower(s->a20_out);
 301         s->outport &= ~KBD_OUT_A20;
 302         break;
 303     case KBD_CCMD_RESET:
 304         qemu_system_reset_request();
 305         break;
 306     case KBD_CCMD_NO_OP:
 307         /* ignore that */
 308         break;
 309     default:
 310         fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", (int)val);
 311         break;
 312     }
 313 }
 314
 315 static uint64_t kbd_read_data(void *opaque, hwaddr addr,
 316                               unsigned size)
 317 {
 318     KBDState *s = opaque;
 319     uint32_t val;
 320
 321     if (s->pending == KBD_PENDING_AUX)
 322         val = ps2_read_data(s->mouse);
 323     else
 324         val = ps2_read_data(s->kbd);
 325
 326     DPRINTF("kbd: read data=0x%02x\n", val);
 327     return val;
 328 }
 329
 330 static void kbd_write_data(void *opaque, hwaddr addr,
 331                            uint64_t val, unsigned size)
 332 {
 333     KBDState *s = opaque;
 334
 335     DPRINTF("kbd: write data=0x%02" PRIx64 "\n", val);
 336
 337     switch(s->write_cmd) {
 338     case 0:
 339         ps2_write_keyboard(s->kbd, val);
 340         break;
 341     case KBD_CCMD_WRITE_MODE:
 342         s->mode = val;
 343         ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0);
 344         /* ??? */
 345         kbd_update_irq(s);
 346         break;
 347     case KBD_CCMD_WRITE_OBUF:
 348         kbd_queue(s, val, 0);
 349         break;
 350     case KBD_CCMD_WRITE_AUX_OBUF:
 351         kbd_queue(s, val, 1);
 352         break;
 353     case KBD_CCMD_WRITE_OUTPORT:
 354         outport_write(s, val);
 355         break;
 356     case KBD_CCMD_WRITE_MOUSE:
 357         ps2_write_mouse(s->mouse, val);
 358         break;
 359     default:
 360         break;
 361     }
 362     s->write_cmd = 0;
 363 }
 364
 365 static void kbd_reset(void *opaque)
 366 {
 367     KBDState *s = opaque;
 368
 369     s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
 370     s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
 371     s->outport = KBD_OUT_RESET | KBD_OUT_A20 | KBD_OUT_ONES;
 372     s->outport_present = false;
 373 }
 374
 375 static uint8_t kbd_outport_default(KBDState *s)
 376 {
 377     return KBD_OUT_RESET | KBD_OUT_A20 | KBD_OUT_ONES
 378            | (s->status & KBD_STAT_OBF ? KBD_OUT_OBF : 0)
 379            | (s->status & KBD_STAT_MOUSE_OBF ? KBD_OUT_MOUSE_OBF : 0);
 380 }
 381
 382 static int kbd_outport_post_load(void *opaque, int version_id)
 383 {
 384     KBDState *s = opaque;
 385     s->outport_present = true;
 386     return 0;
 387 }
 388
 389 static bool kbd_outport_needed(void *opaque)
 390 {
 391     KBDState *s = opaque;
 392     return s->outport != kbd_outport_default(s);
 393 }
 394
 395 static const VMStateDescription vmstate_kbd_outport = {
 396     .name = "pckbd_outport",
 397     .version_id = 1,
 398     .minimum_version_id = 1,
 399     .post_load = kbd_outport_post_load,
 400     .needed = kbd_outport_needed,
 401     .fields = (VMStateField[]) {
 402         VMSTATE_UINT8(outport, KBDState),
 403         VMSTATE_END_OF_LIST()
 404     }
 405 };
 406
 407 static int kbd_post_load(void *opaque, int version_id)
 408 {
 409     KBDState *s = opaque;
 410     if (!s->outport_present) {
 411         s->outport = kbd_outport_default(s);
 412     }
 413     s->outport_present = false;
 414     return 0;
 415 }
 416
 417 static const VMStateDescription vmstate_kbd = {
 418     .name = "pckbd",
 419     .version_id = 3,
 420     .minimum_version_id = 3,
 421     .post_load = kbd_post_load,
 422     .fields = (VMStateField[]) {
 423         VMSTATE_UINT8(write_cmd, KBDState),
 424         VMSTATE_UINT8(status, KBDState),
 425         VMSTATE_UINT8(mode, KBDState),
 426         VMSTATE_UINT8(pending, KBDState),
 427         VMSTATE_END_OF_LIST()
 428     },
 429     .subsections = (const VMStateDescription*[]) {
 430         &vmstate_kbd_outport,
 431         NULL
 432     }
 433 };
 434
 435 /* Memory mapped interface */
 436 static uint32_t kbd_mm_readb (void *opaque, hwaddr addr)
 437 {
 438     KBDState *s = opaque;
 439
 440     if (addr & s->mask)
 441         return kbd_read_status(s, 0, 1) & 0xff;
 442     else
 443         return kbd_read_data(s, 0, 1) & 0xff;
 444 }
 445
 446 static void kbd_mm_writeb (void *opaque, hwaddr addr, uint32_t value)
 447 {
 448     KBDState *s = opaque;
 449
 450     if (addr & s->mask)
 451         kbd_write_command(s, 0, value & 0xff, 1);
 452     else
 453         kbd_write_data(s, 0, value & 0xff, 1);
 454 }
 455
 456 static const MemoryRegionOps i8042_mmio_ops = {
 457     .endianness = DEVICE_NATIVE_ENDIAN,
 458     .old_mmio = {
 459         .read = { kbd_mm_readb, kbd_mm_readb, kbd_mm_readb },
 460         .write = { kbd_mm_writeb, kbd_mm_writeb, kbd_mm_writeb },
 461     },
 462 };
 463
 464 void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq,
 465                    MemoryRegion *region, ram_addr_t size,
 466                    hwaddr mask)
 467 {
 468     KBDState *s = g_malloc0(sizeof(KBDState));
 469
 470     s->irq_kbd = kbd_irq;
 471     s->irq_mouse = mouse_irq;
 472     s->mask = mask;
 473
 474     vmstate_register(NULL, 0, &vmstate_kbd, s);
 475
 476     memory_region_init_io(region, NULL, &i8042_mmio_ops, s, "i8042", size);
 477
 478     s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
 479     s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
 480     qemu_register_reset(kbd_reset, s);
 481 }
 482
 483 #define TYPE_I8042 "i8042"
 484 #define I8042(obj) OBJECT_CHECK(ISAKBDState, (obj), TYPE_I8042)
 485
 486 typedef struct ISAKBDState {
 487     ISADevice parent_obj;
 488
 489     KBDState kbd;
 490     MemoryRegion io[2];
 491 } ISAKBDState;
 492
 493 void i8042_isa_mouse_fake_event(void *opaque)
 494 {
 495     ISADevice *dev = opaque;
 496     ISAKBDState *isa = I8042(dev);
 497     KBDState *s = &isa->kbd;
 498
 499     ps2_mouse_fake_event(s->mouse);
 500 }
 501
 502 void i8042_setup_a20_line(ISADevice *dev, qemu_irq *a20_out)
 503 {
 504     qdev_connect_gpio_out_named(DEVICE(dev), I8042_A20_LINE, 0, *a20_out);
 505 }
 506
 507 static const VMStateDescription vmstate_kbd_isa = {
 508     .name = "pckbd",
 509     .version_id = 3,
 510     .minimum_version_id = 3,
 511     .fields = (VMStateField[]) {
 512         VMSTATE_STRUCT(kbd, ISAKBDState, 0, vmstate_kbd, KBDState),
 513         VMSTATE_END_OF_LIST()
 514     }
 515 };
 516
 517 static const MemoryRegionOps i8042_data_ops = {
 518     .read = kbd_read_data,
 519     .write = kbd_write_data,
 520     .impl = {
 521         .min_access_size = 1,
 522         .max_access_size = 1,
 523     },
 524     .endianness = DEVICE_LITTLE_ENDIAN,
 525 };
 526
 527 static const MemoryRegionOps i8042_cmd_ops = {
 528     .read = kbd_read_status,
 529     .write = kbd_write_command,
 530     .impl = {
 531         .min_access_size = 1,
 532         .max_access_size = 1,
 533     },
 534     .endianness = DEVICE_LITTLE_ENDIAN,
 535 };
 536
 537 static void i8042_initfn(Object *obj)
 538 {
 539     ISAKBDState *isa_s = I8042(obj);
 540     KBDState *s = &isa_s->kbd;
 541
 542     memory_region_init_io(isa_s->io + 0, obj, &i8042_data_ops, s,
 543                           "i8042-data", 1);
 544     memory_region_init_io(isa_s->io + 1, obj, &i8042_cmd_ops, s,
 545                           "i8042-cmd", 1);
 546
 547     qdev_init_gpio_out_named(DEVICE(obj), &s->a20_out, I8042_A20_LINE, 1);
 548 }
 549
 550 static void i8042_realizefn(DeviceState *dev, Error **errp)
 551 {
 552     ISADevice *isadev = ISA_DEVICE(dev);
 553     ISAKBDState *isa_s = I8042(dev);
 554     KBDState *s = &isa_s->kbd;
 555
 556     isa_init_irq(isadev, &s->irq_kbd, 1);
 557     isa_init_irq(isadev, &s->irq_mouse, 12);
 558
 559     isa_register_ioport(isadev, isa_s->io + 0, 0x60);
 560     isa_register_ioport(isadev, isa_s->io + 1, 0x64);
 561
 562     s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
 563     s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
 564     qemu_register_reset(kbd_reset, s);
 565 }
 566
 567 static void i8042_class_initfn(ObjectClass *klass, void *data)
 568 {
 569     DeviceClass *dc = DEVICE_CLASS(klass);
 570
 571     dc->realize = i8042_realizefn;
 572     dc->vmsd = &vmstate_kbd_isa;
 573 }
 574
 575 static const TypeInfo i8042_info = {
 576     .name          = TYPE_I8042,
 577     .parent        = TYPE_ISA_DEVICE,
 578     .instance_size = sizeof(ISAKBDState),
 579     .instance_init = i8042_initfn,
 580     .class_init    = i8042_class_initfn,
 581 };
 582
 583 static void i8042_register_types(void)
 584 {
 585     type_register_static(&i8042_info);
 586 }
 587
 588 type_init(i8042_register_types)