summaryrefslogtreecommitdiff
path: root/hw/input/adb.c
blob: 43d3205472795fc0440af1b92367b2ed8e390d95 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
/*
 * QEMU ADB support
 *
 * Copyright (c) 2004 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "hw/input/adb.h"
#include "ui/console.h"
#include "include/hw/input/adb-keys.h"
#include "ui/input.h"
#include "sysemu/sysemu.h"

/* debug ADB */
//#define DEBUG_ADB

#ifdef DEBUG_ADB
#define ADB_DPRINTF(fmt, ...) \
do { printf("ADB: " fmt , ## __VA_ARGS__); } while (0)
#else
#define ADB_DPRINTF(fmt, ...)
#endif

/* ADB commands */
#define ADB_BUSRESET		0x00
#define ADB_FLUSH               0x01
#define ADB_WRITEREG		0x08
#define ADB_READREG		0x0c

/* ADB device commands */
#define ADB_CMD_SELF_TEST		0xff
#define ADB_CMD_CHANGE_ID		0xfe
#define ADB_CMD_CHANGE_ID_AND_ACT	0xfd
#define ADB_CMD_CHANGE_ID_AND_ENABLE	0x00

/* ADB default device IDs (upper 4 bits of ADB command byte) */
#define ADB_DEVID_DONGLE   1
#define ADB_DEVID_KEYBOARD 2
#define ADB_DEVID_MOUSE    3
#define ADB_DEVID_TABLET   4
#define ADB_DEVID_MODEM    5
#define ADB_DEVID_MISC     7

/* error codes */
#define ADB_RET_NOTPRESENT (-2)

/* The adb keyboard doesn't have every key imaginable */
#define NO_KEY 0xff

static void adb_device_reset(ADBDevice *d)
{
    qdev_reset_all(DEVICE(d));
}

int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len)
{
    ADBDevice *d;
    int devaddr, cmd, i;

    cmd = buf[0] & 0xf;
    if (cmd == ADB_BUSRESET) {
        for(i = 0; i < s->nb_devices; i++) {
            d = s->devices[i];
            adb_device_reset(d);
        }
        return 0;
    }
    devaddr = buf[0] >> 4;
    for(i = 0; i < s->nb_devices; i++) {
        d = s->devices[i];
        if (d->devaddr == devaddr) {
            ADBDeviceClass *adc = ADB_DEVICE_GET_CLASS(d);
            return adc->devreq(d, obuf, buf, len);
        }
    }
    return ADB_RET_NOTPRESENT;
}

/* XXX: move that to cuda ? */
int adb_poll(ADBBusState *s, uint8_t *obuf, uint16_t poll_mask)
{
    ADBDevice *d;
    int olen, i;
    uint8_t buf[1];

    olen = 0;
    for(i = 0; i < s->nb_devices; i++) {
        if (s->poll_index >= s->nb_devices)
            s->poll_index = 0;
        d = s->devices[s->poll_index];
        if ((1 << d->devaddr) & poll_mask) {
            buf[0] = ADB_READREG | (d->devaddr << 4);
            olen = adb_request(s, obuf + 1, buf, 1);
            /* if there is data, we poll again the same device */
            if (olen > 0) {
                obuf[0] = buf[0];
                olen++;
                break;
            }
        }
        s->poll_index++;
    }
    return olen;
}

static const TypeInfo adb_bus_type_info = {
    .name = TYPE_ADB_BUS,
    .parent = TYPE_BUS,
    .instance_size = sizeof(ADBBusState),
};

static const VMStateDescription vmstate_adb_device = {
    .name = "adb_device",
    .version_id = 0,
    .minimum_version_id = 0,
    .fields = (VMStateField[]) {
        VMSTATE_INT32(devaddr, ADBDevice),
        VMSTATE_INT32(handler, ADBDevice),
        VMSTATE_END_OF_LIST()
    }
};

static void adb_device_realizefn(DeviceState *dev, Error **errp)
{
    ADBDevice *d = ADB_DEVICE(dev);
    ADBBusState *bus = ADB_BUS(qdev_get_parent_bus(dev));

    if (bus->nb_devices >= MAX_ADB_DEVICES) {
        return;
    }

    bus->devices[bus->nb_devices++] = d;
}

static void adb_device_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);

    dc->realize = adb_device_realizefn;
    dc->bus_type = TYPE_ADB_BUS;
}

static const TypeInfo adb_device_type_info = {
    .name = TYPE_ADB_DEVICE,
    .parent = TYPE_DEVICE,
    .instance_size = sizeof(ADBDevice),
    .abstract = true,
    .class_init = adb_device_class_init,
};

/***************************************************************/
/* Keyboard ADB device */

#define ADB_KEYBOARD(obj) OBJECT_CHECK(KBDState, (obj), TYPE_ADB_KEYBOARD)

typedef struct KBDState {
    /*< private >*/
    ADBDevice parent_obj;
    /*< public >*/

    uint8_t data[128];
    int rptr, wptr, count;
} KBDState;

#define ADB_KEYBOARD_CLASS(class) \
    OBJECT_CLASS_CHECK(ADBKeyboardClass, (class), TYPE_ADB_KEYBOARD)
#define ADB_KEYBOARD_GET_CLASS(obj) \
    OBJECT_GET_CLASS(ADBKeyboardClass, (obj), TYPE_ADB_KEYBOARD)

typedef struct ADBKeyboardClass {
    /*< private >*/
    ADBDeviceClass parent_class;
    /*< public >*/

    DeviceRealize parent_realize;
} ADBKeyboardClass;

int qcode_to_adb_keycode[] = {
     /* Make sure future additions are automatically set to NO_KEY */
    [0 ... 0xff]               = NO_KEY,

    [Q_KEY_CODE_SHIFT]         = ADB_KEY_LEFT_SHIFT,
    [Q_KEY_CODE_SHIFT_R]       = ADB_KEY_RIGHT_SHIFT,
    [Q_KEY_CODE_ALT]           = ADB_KEY_LEFT_OPTION,
    [Q_KEY_CODE_ALT_R]         = ADB_KEY_RIGHT_OPTION,
    [Q_KEY_CODE_ALTGR]         = ADB_KEY_RIGHT_OPTION,
    [Q_KEY_CODE_CTRL]          = ADB_KEY_LEFT_CONTROL,
    [Q_KEY_CODE_CTRL_R]        = ADB_KEY_RIGHT_CONTROL,
    [Q_KEY_CODE_META_L]        = ADB_KEY_COMMAND,
    [Q_KEY_CODE_META_R]        = ADB_KEY_COMMAND,
    [Q_KEY_CODE_SPC]           = ADB_KEY_SPACEBAR,

    [Q_KEY_CODE_ESC]           = ADB_KEY_ESC,
    [Q_KEY_CODE_1]             = ADB_KEY_1,
    [Q_KEY_CODE_2]             = ADB_KEY_2,
    [Q_KEY_CODE_3]             = ADB_KEY_3,
    [Q_KEY_CODE_4]             = ADB_KEY_4,
    [Q_KEY_CODE_5]             = ADB_KEY_5,
    [Q_KEY_CODE_6]             = ADB_KEY_6,
    [Q_KEY_CODE_7]             = ADB_KEY_7,
    [Q_KEY_CODE_8]             = ADB_KEY_8,
    [Q_KEY_CODE_9]             = ADB_KEY_9,
    [Q_KEY_CODE_0]             = ADB_KEY_0,
    [Q_KEY_CODE_MINUS]         = ADB_KEY_MINUS,
    [Q_KEY_CODE_EQUAL]         = ADB_KEY_EQUAL,
    [Q_KEY_CODE_BACKSPACE]     = ADB_KEY_DELETE,
    [Q_KEY_CODE_TAB]           = ADB_KEY_TAB,
    [Q_KEY_CODE_Q]             = ADB_KEY_Q,
    [Q_KEY_CODE_W]             = ADB_KEY_W,
    [Q_KEY_CODE_E]             = ADB_KEY_E,
    [Q_KEY_CODE_R]             = ADB_KEY_R,
    [Q_KEY_CODE_T]             = ADB_KEY_T,
    [Q_KEY_CODE_Y]             = ADB_KEY_Y,
    [Q_KEY_CODE_U]             = ADB_KEY_U,
    [Q_KEY_CODE_I]             = ADB_KEY_I,
    [Q_KEY_CODE_O]             = ADB_KEY_O,
    [Q_KEY_CODE_P]             = ADB_KEY_P,
    [Q_KEY_CODE_BRACKET_LEFT]  = ADB_KEY_LEFT_BRACKET,
    [Q_KEY_CODE_BRACKET_RIGHT] = ADB_KEY_RIGHT_BRACKET,
    [Q_KEY_CODE_RET]           = ADB_KEY_RETURN,
    [Q_KEY_CODE_A]             = ADB_KEY_A,
    [Q_KEY_CODE_S]             = ADB_KEY_S,
    [Q_KEY_CODE_D]             = ADB_KEY_D,
    [Q_KEY_CODE_F]             = ADB_KEY_F,
    [Q_KEY_CODE_G]             = ADB_KEY_G,
    [Q_KEY_CODE_H]             = ADB_KEY_H,
    [Q_KEY_CODE_J]             = ADB_KEY_J,
    [Q_KEY_CODE_K]             = ADB_KEY_K,
    [Q_KEY_CODE_L]             = ADB_KEY_L,
    [Q_KEY_CODE_SEMICOLON]     = ADB_KEY_SEMICOLON,
    [Q_KEY_CODE_APOSTROPHE]    = ADB_KEY_APOSTROPHE,
    [Q_KEY_CODE_GRAVE_ACCENT]  = ADB_KEY_GRAVE_ACCENT,
    [Q_KEY_CODE_BACKSLASH]     = ADB_KEY_BACKSLASH,
    [Q_KEY_CODE_Z]             = ADB_KEY_Z,
    [Q_KEY_CODE_X]             = ADB_KEY_X,
    [Q_KEY_CODE_C]             = ADB_KEY_C,
    [Q_KEY_CODE_V]             = ADB_KEY_V,
    [Q_KEY_CODE_B]             = ADB_KEY_B,
    [Q_KEY_CODE_N]             = ADB_KEY_N,
    [Q_KEY_CODE_M]             = ADB_KEY_M,
    [Q_KEY_CODE_COMMA]         = ADB_KEY_COMMA,
    [Q_KEY_CODE_DOT]           = ADB_KEY_PERIOD,
    [Q_KEY_CODE_SLASH]         = ADB_KEY_FORWARD_SLASH,
    [Q_KEY_CODE_ASTERISK]      = ADB_KEY_KP_MULTIPLY,
    [Q_KEY_CODE_CAPS_LOCK]     = ADB_KEY_CAPS_LOCK,

    [Q_KEY_CODE_F1]            = ADB_KEY_F1,
    [Q_KEY_CODE_F2]            = ADB_KEY_F2,
    [Q_KEY_CODE_F3]            = ADB_KEY_F3,
    [Q_KEY_CODE_F4]            = ADB_KEY_F4,
    [Q_KEY_CODE_F5]            = ADB_KEY_F5,
    [Q_KEY_CODE_F6]            = ADB_KEY_F6,
    [Q_KEY_CODE_F7]            = ADB_KEY_F7,
    [Q_KEY_CODE_F8]            = ADB_KEY_F8,
    [Q_KEY_CODE_F9]            = ADB_KEY_F9,
    [Q_KEY_CODE_F10]           = ADB_KEY_F10,
    [Q_KEY_CODE_F11]           = ADB_KEY_F11,
    [Q_KEY_CODE_F12]           = ADB_KEY_F12,
    [Q_KEY_CODE_PRINT]         = ADB_KEY_F13,
    [Q_KEY_CODE_SYSRQ]         = ADB_KEY_F13,
    [Q_KEY_CODE_SCROLL_LOCK]   = ADB_KEY_F14,
    [Q_KEY_CODE_PAUSE]         = ADB_KEY_F15,

    [Q_KEY_CODE_NUM_LOCK]      = ADB_KEY_KP_CLEAR,
    [Q_KEY_CODE_KP_EQUALS]     = ADB_KEY_KP_EQUAL,
    [Q_KEY_CODE_KP_DIVIDE]     = ADB_KEY_KP_DIVIDE,
    [Q_KEY_CODE_KP_MULTIPLY]   = ADB_KEY_KP_MULTIPLY,
    [Q_KEY_CODE_KP_SUBTRACT]   = ADB_KEY_KP_SUBTRACT,
    [Q_KEY_CODE_KP_ADD]        = ADB_KEY_KP_PLUS,
    [Q_KEY_CODE_KP_ENTER]      = ADB_KEY_KP_ENTER,
    [Q_KEY_CODE_KP_DECIMAL]    = ADB_KEY_KP_PERIOD,
    [Q_KEY_CODE_KP_0]          = ADB_KEY_KP_0,
    [Q_KEY_CODE_KP_1]          = ADB_KEY_KP_1,
    [Q_KEY_CODE_KP_2]          = ADB_KEY_KP_2,
    [Q_KEY_CODE_KP_3]          = ADB_KEY_KP_3,
    [Q_KEY_CODE_KP_4]          = ADB_KEY_KP_4,
    [Q_KEY_CODE_KP_5]          = ADB_KEY_KP_5,
    [Q_KEY_CODE_KP_6]          = ADB_KEY_KP_6,
    [Q_KEY_CODE_KP_7]          = ADB_KEY_KP_7,
    [Q_KEY_CODE_KP_8]          = ADB_KEY_KP_8,
    [Q_KEY_CODE_KP_9]          = ADB_KEY_KP_9,

    [Q_KEY_CODE_UP]            = ADB_KEY_UP,
    [Q_KEY_CODE_DOWN]          = ADB_KEY_DOWN,
    [Q_KEY_CODE_LEFT]          = ADB_KEY_LEFT,
    [Q_KEY_CODE_RIGHT]         = ADB_KEY_RIGHT,

    [Q_KEY_CODE_HELP]          = ADB_KEY_HELP,
    [Q_KEY_CODE_INSERT]        = ADB_KEY_HELP,
    [Q_KEY_CODE_DELETE]        = ADB_KEY_FORWARD_DELETE,
    [Q_KEY_CODE_HOME]          = ADB_KEY_HOME,
    [Q_KEY_CODE_END]           = ADB_KEY_END,
    [Q_KEY_CODE_PGUP]          = ADB_KEY_PAGE_UP,
    [Q_KEY_CODE_PGDN]          = ADB_KEY_PAGE_DOWN,

    [Q_KEY_CODE_POWER]         = ADB_KEY_POWER
};

static void adb_kbd_put_keycode(void *opaque, int keycode)
{
    KBDState *s = opaque;

    if (s->count < sizeof(s->data)) {
        s->data[s->wptr] = keycode;
        if (++s->wptr == sizeof(s->data))
            s->wptr = 0;
        s->count++;
    }
}

static int adb_kbd_poll(ADBDevice *d, uint8_t *obuf)
{
    KBDState *s = ADB_KEYBOARD(d);
    int keycode;
    int olen;

    olen = 0;
    if (s->count == 0) {
        return 0;
    }
    keycode = s->data[s->rptr];
    s->rptr++;
    if (s->rptr == sizeof(s->data)) {
        s->rptr = 0;
    }
    s->count--;
    /*
     * The power key is the only two byte value key, so it is a special case.
     * Since 0x7f is not a used keycode for ADB we overload it to indicate the
     * power button when we're storing keycodes in our internal buffer, and
     * expand it out to two bytes when we send to the guest.
     */
    if (keycode == 0x7f) {
        obuf[0] = 0x7f;
        obuf[1] = 0x7f;
        olen = 2;
    } else {
        obuf[0] = keycode;
        /* NOTE: the power key key-up is the two byte sequence 0xff 0xff;
         * otherwise we could in theory send a second keycode in the second
         * byte, but choose not to bother.
         */
        obuf[1] = 0xff;
        olen = 2;
    }

    return olen;
}

static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
                           const uint8_t *buf, int len)
{
    KBDState *s = ADB_KEYBOARD(d);
    int cmd, reg, olen;

    if ((buf[0] & 0x0f) == ADB_FLUSH) {
        /* flush keyboard fifo */
        s->wptr = s->rptr = s->count = 0;
        return 0;
    }

    cmd = buf[0] & 0xc;
    reg = buf[0] & 0x3;
    olen = 0;
    switch(cmd) {
    case ADB_WRITEREG:
        switch(reg) {
        case 2:
            /* LED status */
            break;
        case 3:
            switch(buf[2]) {
            case ADB_CMD_SELF_TEST:
                break;
            case ADB_CMD_CHANGE_ID:
            case ADB_CMD_CHANGE_ID_AND_ACT:
            case ADB_CMD_CHANGE_ID_AND_ENABLE:
                d->devaddr = buf[1] & 0xf;
                break;
            default:
                d->devaddr = buf[1] & 0xf;
                /* we support handlers:
                 * 1: Apple Standard Keyboard
                 * 2: Apple Extended Keyboard (LShift = RShift)
                 * 3: Apple Extended Keyboard (LShift != RShift)
                 */
                if (buf[2] == 1 || buf[2] == 2 || buf[2] == 3) {
                    d->handler = buf[2];
                }
                break;
            }
        }
        break;
    case ADB_READREG:
        switch(reg) {
        case 0:
            olen = adb_kbd_poll(d, obuf);
            break;
        case 1:
            break;
        case 2:
            obuf[0] = 0x00; /* XXX: check this */
            obuf[1] = 0x07; /* led status */
            olen = 2;
            break;
        case 3:
            obuf[0] = d->handler;
            obuf[1] = d->devaddr;
            olen = 2;
            break;
        }
        break;
    }
    return olen;
}

/* This is where keyboard events enter this file */
static void adb_keyboard_event(DeviceState *dev, QemuConsole *src,
                               InputEvent *evt)
{
    KBDState *s = (KBDState *)dev;
    int qcode, keycode;

    qcode = qemu_input_key_value_to_qcode(evt->u.key.data->key);
    if (qcode >= ARRAY_SIZE(qcode_to_adb_keycode)) {
        return;
    }
    /* FIXME: take handler into account when translating qcode */
    keycode = qcode_to_adb_keycode[qcode];
    if (keycode == NO_KEY) {  /* We don't want to send this to the guest */
        ADB_DPRINTF("Ignoring NO_KEY\n");
        return;
    }
    if (evt->u.key.data->down == false) { /* if key release event */
        keycode = keycode | 0x80;   /* create keyboard break code */
    }

    adb_kbd_put_keycode(s, keycode);
}

static const VMStateDescription vmstate_adb_kbd = {
    .name = "adb_kbd",
    .version_id = 2,
    .minimum_version_id = 2,
    .fields = (VMStateField[]) {
        VMSTATE_STRUCT(parent_obj, KBDState, 0, vmstate_adb_device, ADBDevice),
        VMSTATE_BUFFER(data, KBDState),
        VMSTATE_INT32(rptr, KBDState),
        VMSTATE_INT32(wptr, KBDState),
        VMSTATE_INT32(count, KBDState),
        VMSTATE_END_OF_LIST()
    }
};

static void adb_kbd_reset(DeviceState *dev)
{
    ADBDevice *d = ADB_DEVICE(dev);
    KBDState *s = ADB_KEYBOARD(dev);

    d->handler = 1;
    d->devaddr = ADB_DEVID_KEYBOARD;
    memset(s->data, 0, sizeof(s->data));
    s->rptr = 0;
    s->wptr = 0;
    s->count = 0;
}

static QemuInputHandler adb_keyboard_handler = {
    .name  = "QEMU ADB Keyboard",
    .mask  = INPUT_EVENT_MASK_KEY,
    .event = adb_keyboard_event,
};

static void adb_kbd_realizefn(DeviceState *dev, Error **errp)
{
    ADBKeyboardClass *akc = ADB_KEYBOARD_GET_CLASS(dev);
    akc->parent_realize(dev, errp);
    qemu_input_handler_register(dev, &adb_keyboard_handler);
}

static void adb_kbd_initfn(Object *obj)
{
    ADBDevice *d = ADB_DEVICE(obj);

    d->devaddr = ADB_DEVID_KEYBOARD;
}

static void adb_kbd_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);
    ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
    ADBKeyboardClass *akc = ADB_KEYBOARD_CLASS(oc);

    akc->parent_realize = dc->realize;
    dc->realize = adb_kbd_realizefn;
    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);

    adc->devreq = adb_kbd_request;
    dc->reset = adb_kbd_reset;
    dc->vmsd = &vmstate_adb_kbd;
}

static const TypeInfo adb_kbd_type_info = {
    .name = TYPE_ADB_KEYBOARD,
    .parent = TYPE_ADB_DEVICE,
    .instance_size = sizeof(KBDState),
    .instance_init = adb_kbd_initfn,
    .class_init = adb_kbd_class_init,
    .class_size = sizeof(ADBKeyboardClass),
};

/***************************************************************/
/* Mouse ADB device */

#define ADB_MOUSE(obj) OBJECT_CHECK(MouseState, (obj), TYPE_ADB_MOUSE)

typedef struct MouseState {
    /*< public >*/
    ADBDevice parent_obj;
    /*< private >*/

    int buttons_state, last_buttons_state;
    int dx, dy, dz;
} MouseState;

#define ADB_MOUSE_CLASS(class) \
    OBJECT_CLASS_CHECK(ADBMouseClass, (class), TYPE_ADB_MOUSE)
#define ADB_MOUSE_GET_CLASS(obj) \
    OBJECT_GET_CLASS(ADBMouseClass, (obj), TYPE_ADB_MOUSE)

typedef struct ADBMouseClass {
    /*< public >*/
    ADBDeviceClass parent_class;
    /*< private >*/

    DeviceRealize parent_realize;
} ADBMouseClass;

static void adb_mouse_event(void *opaque,
                            int dx1, int dy1, int dz1, int buttons_state)
{
    MouseState *s = opaque;

    s->dx += dx1;
    s->dy += dy1;
    s->dz += dz1;
    s->buttons_state = buttons_state;
}


static int adb_mouse_poll(ADBDevice *d, uint8_t *obuf)
{
    MouseState *s = ADB_MOUSE(d);
    int dx, dy;

    if (s->last_buttons_state == s->buttons_state &&
        s->dx == 0 && s->dy == 0)
        return 0;

    dx = s->dx;
    if (dx < -63)
        dx = -63;
    else if (dx > 63)
        dx = 63;

    dy = s->dy;
    if (dy < -63)
        dy = -63;
    else if (dy > 63)
        dy = 63;

    s->dx -= dx;
    s->dy -= dy;
    s->last_buttons_state = s->buttons_state;

    dx &= 0x7f;
    dy &= 0x7f;

    if (!(s->buttons_state & MOUSE_EVENT_LBUTTON))
        dy |= 0x80;
    if (!(s->buttons_state & MOUSE_EVENT_RBUTTON))
        dx |= 0x80;

    obuf[0] = dy;
    obuf[1] = dx;
    return 2;
}

static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
                             const uint8_t *buf, int len)
{
    MouseState *s = ADB_MOUSE(d);
    int cmd, reg, olen;

    if ((buf[0] & 0x0f) == ADB_FLUSH) {
        /* flush mouse fifo */
        s->buttons_state = s->last_buttons_state;
        s->dx = 0;
        s->dy = 0;
        s->dz = 0;
        return 0;
    }

    cmd = buf[0] & 0xc;
    reg = buf[0] & 0x3;
    olen = 0;
    switch(cmd) {
    case ADB_WRITEREG:
        ADB_DPRINTF("write reg %d val 0x%2.2x\n", reg, buf[1]);
        switch(reg) {
        case 2:
            break;
        case 3:
            switch(buf[2]) {
            case ADB_CMD_SELF_TEST:
                break;
            case ADB_CMD_CHANGE_ID:
            case ADB_CMD_CHANGE_ID_AND_ACT:
            case ADB_CMD_CHANGE_ID_AND_ENABLE:
                d->devaddr = buf[1] & 0xf;
                break;
            default:
                d->devaddr = buf[1] & 0xf;
                /* we support handlers:
                 * 0x01: Classic Apple Mouse Protocol / 100 cpi operations
                 * 0x02: Classic Apple Mouse Protocol / 200 cpi operations
                 * we don't support handlers (at least):
                 * 0x03: Mouse systems A3 trackball
                 * 0x04: Extended Apple Mouse Protocol
                 * 0x2f: Microspeed mouse
                 * 0x42: Macally
                 * 0x5f: Microspeed mouse
                 * 0x66: Microspeed mouse
                 */
                if (buf[2] == 1 || buf[2] == 2) {
                    d->handler = buf[2];
                }
                break;
            }
        }
        break;
    case ADB_READREG:
        switch(reg) {
        case 0:
            olen = adb_mouse_poll(d, obuf);
            break;
        case 1:
            break;
        case 3:
            obuf[0] = d->handler;
            obuf[1] = d->devaddr;
            olen = 2;
            break;
        }
        ADB_DPRINTF("read reg %d obuf[0] 0x%2.2x obuf[1] 0x%2.2x\n", reg,
                    obuf[0], obuf[1]);
        break;
    }
    return olen;
}

static void adb_mouse_reset(DeviceState *dev)
{
    ADBDevice *d = ADB_DEVICE(dev);
    MouseState *s = ADB_MOUSE(dev);

    d->handler = 2;
    d->devaddr = ADB_DEVID_MOUSE;
    s->last_buttons_state = s->buttons_state = 0;
    s->dx = s->dy = s->dz = 0;
}

static const VMStateDescription vmstate_adb_mouse = {
    .name = "adb_mouse",
    .version_id = 2,
    .minimum_version_id = 2,
    .fields = (VMStateField[]) {
        VMSTATE_STRUCT(parent_obj, MouseState, 0, vmstate_adb_device,
                       ADBDevice),
        VMSTATE_INT32(buttons_state, MouseState),
        VMSTATE_INT32(last_buttons_state, MouseState),
        VMSTATE_INT32(dx, MouseState),
        VMSTATE_INT32(dy, MouseState),
        VMSTATE_INT32(dz, MouseState),
        VMSTATE_END_OF_LIST()
    }
};

static void adb_mouse_realizefn(DeviceState *dev, Error **errp)
{
    MouseState *s = ADB_MOUSE(dev);
    ADBMouseClass *amc = ADB_MOUSE_GET_CLASS(dev);

    amc->parent_realize(dev, errp);

    qemu_add_mouse_event_handler(adb_mouse_event, s, 0, "QEMU ADB Mouse");
}

static void adb_mouse_initfn(Object *obj)
{
    ADBDevice *d = ADB_DEVICE(obj);

    d->devaddr = ADB_DEVID_MOUSE;
}

static void adb_mouse_class_init(ObjectClass *oc, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(oc);
    ADBDeviceClass *adc = ADB_DEVICE_CLASS(oc);
    ADBMouseClass *amc = ADB_MOUSE_CLASS(oc);

    amc->parent_realize = dc->realize;
    dc->realize = adb_mouse_realizefn;
    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);

    adc->devreq = adb_mouse_request;
    dc->reset = adb_mouse_reset;
    dc->vmsd = &vmstate_adb_mouse;
}

static const TypeInfo adb_mouse_type_info = {
    .name = TYPE_ADB_MOUSE,
    .parent = TYPE_ADB_DEVICE,
    .instance_size = sizeof(MouseState),
    .instance_init = adb_mouse_initfn,
    .class_init = adb_mouse_class_init,
    .class_size = sizeof(ADBMouseClass),
};


static void adb_register_types(void)
{
    type_register_static(&adb_bus_type_info);
    type_register_static(&adb_device_type_info);
    type_register_static(&adb_kbd_type_info);
    type_register_static(&adb_mouse_type_info);
}

type_init(adb_register_types)