summaryrefslogtreecommitdiffstats
path: root/hw/input/pckbd.c
blob: ce86237cf32fc8081cdd22aca01f558c3a9a1474 (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
/*
 * QEMU PC keyboard emulation
 *
 * Copyright (c) 2003 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 "hw/hw.h"
#include "hw/isa/isa.h"
#include "hw/i386/pc.h"
#include "hw/input/ps2.h"
#include "sysemu/sysemu.h"

/* debug PC keyboard */
//#define DEBUG_KBD
#ifdef DEBUG_KBD
#define DPRINTF(fmt, ...)                                       \
    do { printf("KBD: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...)
#endif

/*	Keyboard Controller Commands */
#define KBD_CCMD_READ_MODE	0x20	/* Read mode bits */
#define KBD_CCMD_WRITE_MODE	0x60	/* Write mode bits */
#define KBD_CCMD_GET_VERSION	0xA1	/* Get controller version */
#define KBD_CCMD_MOUSE_DISABLE	0xA7	/* Disable mouse interface */
#define KBD_CCMD_MOUSE_ENABLE	0xA8	/* Enable mouse interface */
#define KBD_CCMD_TEST_MOUSE	0xA9	/* Mouse interface test */
#define KBD_CCMD_SELF_TEST	0xAA	/* Controller self test */
#define KBD_CCMD_KBD_TEST	0xAB	/* Keyboard interface test */
#define KBD_CCMD_KBD_DISABLE	0xAD	/* Keyboard interface disable */
#define KBD_CCMD_KBD_ENABLE	0xAE	/* Keyboard interface enable */
#define KBD_CCMD_READ_INPORT    0xC0    /* read input port */
#define KBD_CCMD_READ_OUTPORT	0xD0    /* read output port */
#define KBD_CCMD_WRITE_OUTPORT	0xD1    /* write output port */
#define KBD_CCMD_WRITE_OBUF	0xD2
#define KBD_CCMD_WRITE_AUX_OBUF	0xD3    /* Write to output buffer as if
					   initiated by the auxiliary device */
#define KBD_CCMD_WRITE_MOUSE	0xD4	/* Write the following byte to the mouse */
#define KBD_CCMD_DISABLE_A20    0xDD    /* HP vectra only ? */
#define KBD_CCMD_ENABLE_A20     0xDF    /* HP vectra only ? */
#define KBD_CCMD_PULSE_BITS_3_0 0xF0    /* Pulse bits 3-0 of the output port P2. */
#define KBD_CCMD_RESET          0xFE    /* Pulse bit 0 of the output port P2 = CPU reset. */
#define KBD_CCMD_NO_OP          0xFF    /* Pulse no bits of the output port P2. */

/* Keyboard Commands */
#define KBD_CMD_SET_LEDS	0xED	/* Set keyboard leds */
#define KBD_CMD_ECHO     	0xEE
#define KBD_CMD_GET_ID 	        0xF2	/* get keyboard ID */
#define KBD_CMD_SET_RATE	0xF3	/* Set typematic rate */
#define KBD_CMD_ENABLE		0xF4	/* Enable scanning */
#define KBD_CMD_RESET_DISABLE	0xF5	/* reset and disable scanning */
#define KBD_CMD_RESET_ENABLE   	0xF6    /* reset and enable scanning */
#define KBD_CMD_RESET		0xFF	/* Reset */

/* Keyboard Replies */
#define KBD_REPLY_POR		0xAA	/* Power on reset */
#define KBD_REPLY_ACK		0xFA	/* Command ACK */
#define KBD_REPLY_RESEND	0xFE	/* Command NACK, send the cmd again */

/* Status Register Bits */
#define KBD_STAT_OBF 		0x01	/* Keyboard output buffer full */
#define KBD_STAT_IBF 		0x02	/* Keyboard input buffer full */
#define KBD_STAT_SELFTEST	0x04	/* Self test successful */
#define KBD_STAT_CMD		0x08	/* Last write was a command write (0=data) */
#define KBD_STAT_UNLOCKED	0x10	/* Zero if keyboard locked */
#define KBD_STAT_MOUSE_OBF	0x20	/* Mouse output buffer full */
#define KBD_STAT_GTO 		0x40	/* General receive/xmit timeout */
#define KBD_STAT_PERR 		0x80	/* Parity error */

/* Controller Mode Register Bits */
#define KBD_MODE_KBD_INT	0x01	/* Keyboard data generate IRQ1 */
#define KBD_MODE_MOUSE_INT	0x02	/* Mouse data generate IRQ12 */
#define KBD_MODE_SYS 		0x04	/* The system flag (?) */
#define KBD_MODE_NO_KEYLOCK	0x08	/* The keylock doesn't affect the keyboard if set */
#define KBD_MODE_DISABLE_KBD	0x10	/* Disable keyboard interface */
#define KBD_MODE_DISABLE_MOUSE	0x20	/* Disable mouse interface */
#define KBD_MODE_KCC 		0x40	/* Scan code conversion to PC format */
#define KBD_MODE_RFU		0x80

/* Output Port Bits */
#define KBD_OUT_RESET           0x01    /* 1=normal mode, 0=reset */
#define KBD_OUT_A20             0x02    /* x86 only */
#define KBD_OUT_OBF             0x10    /* Keyboard output buffer full */
#define KBD_OUT_MOUSE_OBF       0x20    /* Mouse output buffer full */

/* Mouse Commands */
#define AUX_SET_SCALE11		0xE6	/* Set 1:1 scaling */
#define AUX_SET_SCALE21		0xE7	/* Set 2:1 scaling */
#define AUX_SET_RES		0xE8	/* Set resolution */
#define AUX_GET_SCALE		0xE9	/* Get scaling factor */
#define AUX_SET_STREAM		0xEA	/* Set stream mode */
#define AUX_POLL		0xEB	/* Poll */
#define AUX_RESET_WRAP		0xEC	/* Reset wrap mode */
#define AUX_SET_WRAP		0xEE	/* Set wrap mode */
#define AUX_SET_REMOTE		0xF0	/* Set remote mode */
#define AUX_GET_TYPE		0xF2	/* Get type */
#define AUX_SET_SAMPLE		0xF3	/* Set sample rate */
#define AUX_ENABLE_DEV		0xF4	/* Enable aux device */
#define AUX_DISABLE_DEV		0xF5	/* Disable aux device */
#define AUX_SET_DEFAULT		0xF6
#define AUX_RESET		0xFF	/* Reset aux device */
#define AUX_ACK			0xFA	/* Command byte ACK. */

#define MOUSE_STATUS_REMOTE     0x40
#define MOUSE_STATUS_ENABLED    0x20
#define MOUSE_STATUS_SCALE21    0x10

#define KBD_PENDING_KBD         1
#define KBD_PENDING_AUX         2

typedef struct KBDState {
    uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
    uint8_t status;
    uint8_t mode;
    uint8_t outport;
    /* Bitmask of devices with data available.  */
    uint8_t pending;
    void *kbd;
    void *mouse;

    qemu_irq irq_kbd;
    qemu_irq irq_mouse;
    qemu_irq *a20_out;
    hwaddr mask;
} KBDState;

/* update irq and KBD_STAT_[MOUSE_]OBF */
/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
   incorrect, but it avoids having to simulate exact delays */
static void kbd_update_irq(KBDState *s)
{
    int irq_kbd_level, irq_mouse_level;

    irq_kbd_level = 0;
    irq_mouse_level = 0;
    s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
    s->outport &= ~(KBD_OUT_OBF | KBD_OUT_MOUSE_OBF);
    if (s->pending) {
        s->status |= KBD_STAT_OBF;
        s->outport |= KBD_OUT_OBF;
        /* kbd data takes priority over aux data.  */
        if (s->pending == KBD_PENDING_AUX) {
            s->status |= KBD_STAT_MOUSE_OBF;
            s->outport |= KBD_OUT_MOUSE_OBF;
            if (s->mode & KBD_MODE_MOUSE_INT)
                irq_mouse_level = 1;
        } else {
            if ((s->mode & KBD_MODE_KBD_INT) &&
                !(s->mode & KBD_MODE_DISABLE_KBD))
                irq_kbd_level = 1;
        }
    }
    qemu_set_irq(s->irq_kbd, irq_kbd_level);
    qemu_set_irq(s->irq_mouse, irq_mouse_level);
}

static void kbd_update_kbd_irq(void *opaque, int level)
{
    KBDState *s = (KBDState *)opaque;

    if (level)
        s->pending |= KBD_PENDING_KBD;
    else
        s->pending &= ~KBD_PENDING_KBD;
    kbd_update_irq(s);
}

static void kbd_update_aux_irq(void *opaque, int level)
{
    KBDState *s = (KBDState *)opaque;

    if (level)
        s->pending |= KBD_PENDING_AUX;
    else
        s->pending &= ~KBD_PENDING_AUX;
    kbd_update_irq(s);
}

static uint64_t kbd_read_status(void *opaque, hwaddr addr,
                                unsigned size)
{
    KBDState *s = opaque;
    int val;
    val = s->status;
    DPRINTF("kbd: read status=0x%02x\n", val);
    return val;
}

static void kbd_queue(KBDState *s, int b, int aux)
{
    if (aux)
        ps2_queue(s->mouse, b);
    else
        ps2_queue(s->kbd, b);
}

static void outport_write(KBDState *s, uint32_t val)
{
    DPRINTF("kbd: write outport=0x%02x\n", val);
    s->outport = val;
    if (s->a20_out) {
        qemu_set_irq(*s->a20_out, (val >> 1) & 1);
    }
    if (!(val & 1)) {
        qemu_system_reset_request();
    }
}

static void kbd_write_command(void *opaque, hwaddr addr,
                              uint64_t val, unsigned size)
{
    KBDState *s = opaque;

    DPRINTF("kbd: write cmd=0x%02x\n", val);

    /* Bits 3-0 of the output port P2 of the keyboard controller may be pulsed
     * low for approximately 6 micro seconds. Bits 3-0 of the KBD_CCMD_PULSE
     * command specify the output port bits to be pulsed.
     * 0: Bit should be pulsed. 1: Bit should not be modified.
     * The only useful version of this command is pulsing bit 0,
     * which does a CPU reset.
     */
    if((val & KBD_CCMD_PULSE_BITS_3_0) == KBD_CCMD_PULSE_BITS_3_0) {
        if(!(val & 1))
            val = KBD_CCMD_RESET;
        else
            val = KBD_CCMD_NO_OP;
    }

    switch(val) {
    case KBD_CCMD_READ_MODE:
        kbd_queue(s, s->mode, 0);
        break;
    case KBD_CCMD_WRITE_MODE:
    case KBD_CCMD_WRITE_OBUF:
    case KBD_CCMD_WRITE_AUX_OBUF:
    case KBD_CCMD_WRITE_MOUSE:
    case KBD_CCMD_WRITE_OUTPORT:
        s->write_cmd = val;
        break;
    case KBD_CCMD_MOUSE_DISABLE:
        s->mode |= KBD_MODE_DISABLE_MOUSE;
        break;
    case KBD_CCMD_MOUSE_ENABLE:
        s->mode &= ~KBD_MODE_DISABLE_MOUSE;
        break;
    case KBD_CCMD_TEST_MOUSE:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_SELF_TEST:
        s->status |= KBD_STAT_SELFTEST;
        kbd_queue(s, 0x55, 0);
        break;
    case KBD_CCMD_KBD_TEST:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_KBD_DISABLE:
        s->mode |= KBD_MODE_DISABLE_KBD;
        kbd_update_irq(s);
        break;
    case KBD_CCMD_KBD_ENABLE:
        s->mode &= ~KBD_MODE_DISABLE_KBD;
        kbd_update_irq(s);
        break;
    case KBD_CCMD_READ_INPORT:
        kbd_queue(s, 0x00, 0);
        break;
    case KBD_CCMD_READ_OUTPORT:
        kbd_queue(s, s->outport, 0);
        break;
    case KBD_CCMD_ENABLE_A20:
        if (s->a20_out) {
            qemu_irq_raise(*s->a20_out);
        }
        s->outport |= KBD_OUT_A20;
        break;
    case KBD_CCMD_DISABLE_A20:
        if (s->a20_out) {
            qemu_irq_lower(*s->a20_out);
        }
        s->outport &= ~KBD_OUT_A20;
        break;
    case KBD_CCMD_RESET:
        qemu_system_reset_request();
        break;
    case KBD_CCMD_NO_OP:
        /* ignore that */
        break;
    default:
        fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", (int)val);
        break;
    }
}

static uint64_t kbd_read_data(void *opaque, hwaddr addr,
                              unsigned size)
{
    KBDState *s = opaque;
    uint32_t val;

    if (s->pending == KBD_PENDING_AUX)
        val = ps2_read_data(s->mouse);
    else
        val = ps2_read_data(s->kbd);

    DPRINTF("kbd: read data=0x%02x\n", val);
    return val;
}

static void kbd_write_data(void *opaque, hwaddr addr,
                           uint64_t val, unsigned size)
{
    KBDState *s = opaque;

    DPRINTF("kbd: write data=0x%02x\n", val);

    switch(s->write_cmd) {
    case 0:
        ps2_write_keyboard(s->kbd, val);
        break;
    case KBD_CCMD_WRITE_MODE:
        s->mode = val;
        ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0);
        /* ??? */
        kbd_update_irq(s);
        break;
    case KBD_CCMD_WRITE_OBUF:
        kbd_queue(s, val, 0);
        break;
    case KBD_CCMD_WRITE_AUX_OBUF:
        kbd_queue(s, val, 1);
        break;
    case KBD_CCMD_WRITE_OUTPORT:
        outport_write(s, val);
        break;
    case KBD_CCMD_WRITE_MOUSE:
        ps2_write_mouse(s->mouse, val);
        break;
    default:
        break;
    }
    s->write_cmd = 0;
}

static void kbd_reset(void *opaque)
{
    KBDState *s = opaque;

    s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
    s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
    s->outport = KBD_OUT_RESET | KBD_OUT_A20;
}

static const VMStateDescription vmstate_kbd = {
    .name = "pckbd",
    .version_id = 3,
    .minimum_version_id = 3,
    .minimum_version_id_old = 3,
    .fields      = (VMStateField []) {
        VMSTATE_UINT8(write_cmd, KBDState),
        VMSTATE_UINT8(status, KBDState),
        VMSTATE_UINT8(mode, KBDState),
        VMSTATE_UINT8(pending, KBDState),
        VMSTATE_END_OF_LIST()
    }
};

/* Memory mapped interface */
static uint32_t kbd_mm_readb (void *opaque, hwaddr addr)
{
    KBDState *s = opaque;

    if (addr & s->mask)
        return kbd_read_status(s, 0, 1) & 0xff;
    else
        return kbd_read_data(s, 0, 1) & 0xff;
}

static void kbd_mm_writeb (void *opaque, hwaddr addr, uint32_t value)
{
    KBDState *s = opaque;

    if (addr & s->mask)
        kbd_write_command(s, 0, value & 0xff, 1);
    else
        kbd_write_data(s, 0, value & 0xff, 1);
}

static const MemoryRegionOps i8042_mmio_ops = {
    .endianness = DEVICE_NATIVE_ENDIAN,
    .old_mmio = {
        .read = { kbd_mm_readb, kbd_mm_readb, kbd_mm_readb },
        .write = { kbd_mm_writeb, kbd_mm_writeb, kbd_mm_writeb },
    },
};

void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq,
                   MemoryRegion *region, ram_addr_t size,
                   hwaddr mask)
{
    KBDState *s = g_malloc0(sizeof(KBDState));

    s->irq_kbd = kbd_irq;
    s->irq_mouse = mouse_irq;
    s->mask = mask;

    vmstate_register(NULL, 0, &vmstate_kbd, s);

    memory_region_init_io(region, NULL, &i8042_mmio_ops, s, "i8042", size);

    s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
    s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
    qemu_register_reset(kbd_reset, s);
}

#define TYPE_I8042 "i8042"
#define I8042(obj) OBJECT_CHECK(ISAKBDState, (obj), TYPE_I8042)

typedef struct ISAKBDState {
    ISADevice parent_obj;

    KBDState kbd;
    MemoryRegion io[2];
} ISAKBDState;

void i8042_isa_mouse_fake_event(void *opaque)
{
    ISADevice *dev = opaque;
    ISAKBDState *isa = I8042(dev);
    KBDState *s = &isa->kbd;

    ps2_mouse_fake_event(s->mouse);
}

void i8042_setup_a20_line(ISADevice *dev, qemu_irq *a20_out)
{
    ISAKBDState *isa = I8042(dev);
    KBDState *s = &isa->kbd;

    s->a20_out = a20_out;
}

static const VMStateDescription vmstate_kbd_isa = {
    .name = "pckbd",
    .version_id = 3,
    .minimum_version_id = 3,
    .minimum_version_id_old = 3,
    .fields      = (VMStateField []) {
        VMSTATE_STRUCT(kbd, ISAKBDState, 0, vmstate_kbd, KBDState),
        VMSTATE_END_OF_LIST()
    }
};

static const MemoryRegionOps i8042_data_ops = {
    .read = kbd_read_data,
    .write = kbd_write_data,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
    .endianness = DEVICE_LITTLE_ENDIAN,
};

static const MemoryRegionOps i8042_cmd_ops = {
    .read = kbd_read_status,
    .write = kbd_write_command,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
    .endianness = DEVICE_LITTLE_ENDIAN,
};

static void i8042_initfn(Object *obj)
{
    ISAKBDState *isa_s = I8042(obj);
    KBDState *s = &isa_s->kbd;

    memory_region_init_io(isa_s->io + 0, obj, &i8042_data_ops, s,
                          "i8042-data", 1);
    memory_region_init_io(isa_s->io + 1, obj, &i8042_cmd_ops, s,
                          "i8042-cmd", 1);
}

static void i8042_realizefn(DeviceState *dev, Error **errp)
{
    ISADevice *isadev = ISA_DEVICE(dev);
    ISAKBDState *isa_s = I8042(dev);
    KBDState *s = &isa_s->kbd;

    isa_init_irq(isadev, &s->irq_kbd, 1);
    isa_init_irq(isadev, &s->irq_mouse, 12);

    isa_register_ioport(isadev, isa_s->io + 0, 0x60);
    isa_register_ioport(isadev, isa_s->io + 1, 0x64);

    s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
    s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
    qemu_register_reset(kbd_reset, s);
}

static void i8042_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);

    dc->realize = i8042_realizefn;
    dc->no_user = 1;
    dc->vmsd = &vmstate_kbd_isa;
}

static const TypeInfo i8042_info = {
    .name          = TYPE_I8042,
    .parent        = TYPE_ISA_DEVICE,
    .instance_size = sizeof(ISAKBDState),
    .instance_init = i8042_initfn,
    .class_init    = i8042_class_initfn,
};

static void i8042_register_types(void)
{
    type_register_static(&i8042_info);
}

type_init(i8042_register_types)
OpenPOWER on IntegriCloud