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1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <arch/i8042.h>
30
#include <arch/i8259.h>
31
#include <arch/interrupt.h>
32
#include <cpu.h>
33
#include <arch/asm.h>
34
#include <arch.h>
35
#include <print.h>
508 jermar 36
#include <synch/spinlock.h>
37
#include <typedefs.h>
511 jermar 38
#include <console/chardev.h>
39
#include <console/console.h>
517 jermar 40
#include <macros.h>
576 palkovsky 41
#include <interrupt.h>
1 jermar 42
 
508 jermar 43
/**
1 jermar 44
 * i8042 processor driver.
508 jermar 45
 * It takes care of low-level keyboard functions.
1 jermar 46
 */
47
 
893 jermar 48
#define i8042_DATA          0x60
49
#define i8042_STATUS            0x64
878 vana 50
#define i8042_BUFFER_FULL_MASK      0x01
512 jermar 51
 
52
/** Keyboard commands. */
53
#define KBD_ENABLE  0xf4
54
#define KBD_DISABLE 0xf5
55
#define KBD_ACK     0xfa
56
 
670 vana 57
/*
893 jermar 58
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
59
 *     placed in 8042 command register.Format:
60
 *
61
 *    |7|6|5|4|3|2|1|0|8042 Command Byte
62
 *     | | | | | | | `---- 1=enable output register full interrupt
63
 *     | | | | | | `----- should be 0
64
 *     | | | | | `------ 1=set status register system, 0=clear
65
 *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
66
 *     | | | `-------- disable keyboard I/O by driving clock line low
67
 *     | | `--------- disable auxiliary device, drives clock line low
68
 *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
69
 *     `----------- reserved, should be 0
70
 */
670 vana 71
 
893 jermar 72
#define i8042_SET_COMMAND   0x60
73
#define i8042_COMMAND       0x49
74
#define i8042_WAIT_MASK     0x02
670 vana 75
 
508 jermar 76
#define SPECIAL     '?'
77
#define KEY_RELEASE 0x80
78
 
79
static void key_released(__u8 sc);
80
static void key_pressed(__u8 sc);
878 vana 81
static char key_read(chardev_t *d);
508 jermar 82
 
83
#define PRESSED_SHIFT       (1<<0)
84
#define PRESSED_CAPSLOCK    (1<<1)
85
#define LOCKED_CAPSLOCK     (1<<0)
86
 
878 vana 87
#define ACTIVE_READ_BUFF_SIZE 16 /*Must be power of 2*/
88
 
89
__u8 active_read_buff[ACTIVE_READ_BUFF_SIZE]={0};
90
 
623 jermar 91
SPINLOCK_INITIALIZE(keylock);       /**< keylock protects keyflags and lockflags. */
508 jermar 92
static volatile int keyflags;       /**< Tracking of multiple keypresses. */
509 jermar 93
static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
508 jermar 94
 
575 palkovsky 95
static void i8042_suspend(chardev_t *);
96
static void i8042_resume(chardev_t *);
511 jermar 97
 
98
static chardev_t kbrd;
99
static chardev_operations_t ops = {
100
    .suspend = i8042_suspend,
878 vana 101
    .resume = i8042_resume,
102
    .read = key_read
511 jermar 103
};
104
 
508 jermar 105
/** Primary meaning of scancodes. */
106
static char sc_primary_map[] = {
107
    SPECIAL, /* 0x00 */
108
    SPECIAL, /* 0x01 - Esc */
109
    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
588 palkovsky 110
    '\b', /* 0x0e - Backspace */
508 jermar 111
    '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
112
    SPECIAL, /* 0x1d - LCtrl */
113
    'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
114
    '`',
115
    SPECIAL, /* 0x2a - LShift */
116
    '\\',
117
    'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
118
    SPECIAL, /* 0x36 - RShift */
119
    '*',
120
    SPECIAL, /* 0x38 - LAlt */
121
    ' ',
122
    SPECIAL, /* 0x3a - CapsLock */
123
    SPECIAL, /* 0x3b - F1 */
124
    SPECIAL, /* 0x3c - F2 */
125
    SPECIAL, /* 0x3d - F3 */
126
    SPECIAL, /* 0x3e - F4 */
127
    SPECIAL, /* 0x3f - F5 */
128
    SPECIAL, /* 0x40 - F6 */
129
    SPECIAL, /* 0x41 - F7 */
130
    SPECIAL, /* 0x42 - F8 */
131
    SPECIAL, /* 0x43 - F9 */
132
    SPECIAL, /* 0x44 - F10 */
133
    SPECIAL, /* 0x45 - NumLock */
134
    SPECIAL, /* 0x46 - ScrollLock */
135
    '7', '8', '9', '-',
136
    '4', '5', '6', '+',
137
    '1', '2', '3',
138
    '0', '.',
139
    SPECIAL, /* 0x54 - Alt-SysRq */
140
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
141
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
142
    SPECIAL, /* 0x57 - F11 */
143
    SPECIAL, /* 0x58 - F12 */
144
    SPECIAL, /* 0x59 */
145
    SPECIAL, /* 0x5a */
146
    SPECIAL, /* 0x5b */
147
    SPECIAL, /* 0x5c */
148
    SPECIAL, /* 0x5d */
149
    SPECIAL, /* 0x5e */
150
    SPECIAL, /* 0x5f */
151
    SPECIAL, /* 0x60 */
152
    SPECIAL, /* 0x61 */
153
    SPECIAL, /* 0x62 */
154
    SPECIAL, /* 0x63 */
155
    SPECIAL, /* 0x64 */
156
    SPECIAL, /* 0x65 */
157
    SPECIAL, /* 0x66 */
158
    SPECIAL, /* 0x67 */
159
    SPECIAL, /* 0x68 */
160
    SPECIAL, /* 0x69 */
161
    SPECIAL, /* 0x6a */
162
    SPECIAL, /* 0x6b */
163
    SPECIAL, /* 0x6c */
164
    SPECIAL, /* 0x6d */
165
    SPECIAL, /* 0x6e */
166
    SPECIAL, /* 0x6f */
167
    SPECIAL, /* 0x70 */
168
    SPECIAL, /* 0x71 */
169
    SPECIAL, /* 0x72 */
170
    SPECIAL, /* 0x73 */
171
    SPECIAL, /* 0x74 */
172
    SPECIAL, /* 0x75 */
173
    SPECIAL, /* 0x76 */
174
    SPECIAL, /* 0x77 */
175
    SPECIAL, /* 0x78 */
176
    SPECIAL, /* 0x79 */
177
    SPECIAL, /* 0x7a */
178
    SPECIAL, /* 0x7b */
179
    SPECIAL, /* 0x7c */
180
    SPECIAL, /* 0x7d */
181
    SPECIAL, /* 0x7e */
182
    SPECIAL, /* 0x7f */
183
};
184
 
185
/** Secondary meaning of scancodes. */
186
static char sc_secondary_map[] = {
187
    SPECIAL, /* 0x00 */
188
    SPECIAL, /* 0x01 - Esc */
189
    '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
190
    SPECIAL, /* 0x0e - Backspace */
191
    '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
192
    SPECIAL, /* 0x1d - LCtrl */
193
    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
194
    '~',
195
    SPECIAL, /* 0x2a - LShift */
196
    '|',
197
    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
198
    SPECIAL, /* 0x36 - RShift */
199
    '*',
200
    SPECIAL, /* 0x38 - LAlt */
201
    ' ',
202
    SPECIAL, /* 0x3a - CapsLock */
203
    SPECIAL, /* 0x3b - F1 */
204
    SPECIAL, /* 0x3c - F2 */
205
    SPECIAL, /* 0x3d - F3 */
206
    SPECIAL, /* 0x3e - F4 */
207
    SPECIAL, /* 0x3f - F5 */
208
    SPECIAL, /* 0x40 - F6 */
209
    SPECIAL, /* 0x41 - F7 */
210
    SPECIAL, /* 0x42 - F8 */
211
    SPECIAL, /* 0x43 - F9 */
212
    SPECIAL, /* 0x44 - F10 */
213
    SPECIAL, /* 0x45 - NumLock */
214
    SPECIAL, /* 0x46 - ScrollLock */
215
    '7', '8', '9', '-',
216
    '4', '5', '6', '+',
217
    '1', '2', '3',
218
    '0', '.',
219
    SPECIAL, /* 0x54 - Alt-SysRq */
220
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
221
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
222
    SPECIAL, /* 0x57 - F11 */
223
    SPECIAL, /* 0x58 - F12 */
224
    SPECIAL, /* 0x59 */
225
    SPECIAL, /* 0x5a */
226
    SPECIAL, /* 0x5b */
227
    SPECIAL, /* 0x5c */
228
    SPECIAL, /* 0x5d */
229
    SPECIAL, /* 0x5e */
230
    SPECIAL, /* 0x5f */
231
    SPECIAL, /* 0x60 */
232
    SPECIAL, /* 0x61 */
233
    SPECIAL, /* 0x62 */
234
    SPECIAL, /* 0x63 */
235
    SPECIAL, /* 0x64 */
236
    SPECIAL, /* 0x65 */
237
    SPECIAL, /* 0x66 */
238
    SPECIAL, /* 0x67 */
239
    SPECIAL, /* 0x68 */
240
    SPECIAL, /* 0x69 */
241
    SPECIAL, /* 0x6a */
242
    SPECIAL, /* 0x6b */
243
    SPECIAL, /* 0x6c */
244
    SPECIAL, /* 0x6d */
245
    SPECIAL, /* 0x6e */
246
    SPECIAL, /* 0x6f */
247
    SPECIAL, /* 0x70 */
248
    SPECIAL, /* 0x71 */
249
    SPECIAL, /* 0x72 */
250
    SPECIAL, /* 0x73 */
251
    SPECIAL, /* 0x74 */
252
    SPECIAL, /* 0x75 */
253
    SPECIAL, /* 0x76 */
254
    SPECIAL, /* 0x77 */
255
    SPECIAL, /* 0x78 */
256
    SPECIAL, /* 0x79 */
257
    SPECIAL, /* 0x7a */
258
    SPECIAL, /* 0x7b */
259
    SPECIAL, /* 0x7c */
260
    SPECIAL, /* 0x7d */
261
    SPECIAL, /* 0x7e */
262
    SPECIAL, /* 0x7f */
263
};
264
 
576 palkovsky 265
static void i8042_interrupt(int n, void *stack);
266
 
508 jermar 267
/** Initialize i8042. */
1 jermar 268
void i8042_init(void)
269
{
576 palkovsky 270
    exc_register(VECTOR_KBD, "i8042_interrupt", i8042_interrupt);
893 jermar 271
    while (inb(i8042_STATUS)&i8042_WAIT_MASK) {
272
        /* wait */
273
    }
670 vana 274
    outb(i8042_STATUS,i8042_SET_COMMAND);
893 jermar 275
    while (inb(i8042_STATUS)&i8042_WAIT_MASK) {
276
        /* wait */
277
    }
670 vana 278
    outb(i8042_DATA,i8042_COMMAND);
279
 
512 jermar 280
    trap_virtual_enable_irqs(1<<IRQ_KBD);
575 palkovsky 281
    chardev_initialize("i8042_kbd", &kbrd, &ops);
511 jermar 282
    stdin = &kbrd;
1 jermar 283
}
284
 
508 jermar 285
/** Process i8042 interrupt.
286
 *
287
 * @param n Interrupt vector.
288
 * @param stack Interrupted stack.
289
 */
576 palkovsky 290
void i8042_interrupt(int n, void *stack)
1 jermar 291
{
292
    __u8 x;
293
 
294
    trap_virtual_eoi();
512 jermar 295
    x = inb(i8042_DATA);
508 jermar 296
    if (x & KEY_RELEASE)
297
        key_released(x ^ KEY_RELEASE);
298
    else
299
        key_pressed(x);
1 jermar 300
}
508 jermar 301
 
302
/** Process release of key.
303
 *
304
 * @param sc Scancode of the key being released.
305
 */
306
void key_released(__u8 sc)
307
{
308
    spinlock_lock(&keylock);
309
    switch (sc) {
310
        case SC_LSHIFT:
311
        case SC_RSHIFT:
312
        keyflags &= ~PRESSED_SHIFT;
313
        break;
314
        case SC_CAPSLOCK:
315
        keyflags &= ~PRESSED_CAPSLOCK;
316
        if (lockflags & LOCKED_CAPSLOCK)
317
            lockflags &= ~LOCKED_CAPSLOCK;
318
        else
319
            lockflags |= LOCKED_CAPSLOCK;
320
        break;
321
        default:
322
        break;
323
    }
324
    spinlock_unlock(&keylock);
325
}
326
 
327
/** Process keypress.
328
 *
329
 * @param sc Scancode of the key being pressed.
330
 */
331
void key_pressed(__u8 sc)
332
{
333
    char *map = sc_primary_map;
334
    char ascii = sc_primary_map[sc];
335
    bool shift, capslock;
336
    bool letter = false;
337
 
338
    spinlock_lock(&keylock);
339
    switch (sc) {
601 palkovsky 340
    case SC_LSHIFT:
341
    case SC_RSHIFT:
508 jermar 342
            keyflags |= PRESSED_SHIFT;
343
        break;
601 palkovsky 344
    case SC_CAPSLOCK:
508 jermar 345
        keyflags |= PRESSED_CAPSLOCK;
346
        break;
601 palkovsky 347
    case SC_SPEC_ESCAPE:
348
        break;
349
    case SC_LEFTARR:
350
        chardev_push_character(&kbrd, 0x1b);
351
        chardev_push_character(&kbrd, 0x5b);
352
        chardev_push_character(&kbrd, 0x44);
353
        break;
354
    case SC_RIGHTARR:
355
        chardev_push_character(&kbrd, 0x1b);
356
        chardev_push_character(&kbrd, 0x5b);
357
        chardev_push_character(&kbrd, 0x43);
358
        break;
359
    case SC_UPARR:
360
        chardev_push_character(&kbrd, 0x1b);
361
        chardev_push_character(&kbrd, 0x5b);
362
        chardev_push_character(&kbrd, 0x41);
363
        break;
364
    case SC_DOWNARR:
365
        chardev_push_character(&kbrd, 0x1b);
366
        chardev_push_character(&kbrd, 0x5b);
367
        chardev_push_character(&kbrd, 0x42);
368
        break;
606 palkovsky 369
    case SC_HOME:
370
        chardev_push_character(&kbrd, 0x1b);
371
        chardev_push_character(&kbrd, 0x4f);
372
        chardev_push_character(&kbrd, 0x48);
373
        break;
374
    case SC_END:
375
        chardev_push_character(&kbrd, 0x1b);
376
        chardev_push_character(&kbrd, 0x4f);
377
        chardev_push_character(&kbrd, 0x46);
378
        break;
379
    case SC_DELETE:
380
        chardev_push_character(&kbrd, 0x1b);
381
        chardev_push_character(&kbrd, 0x5b);
382
        chardev_push_character(&kbrd, 0x33);
383
        chardev_push_character(&kbrd, 0x7e);
384
        break;
601 palkovsky 385
    default:
517 jermar 386
            letter = is_lower(ascii);
508 jermar 387
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
388
        shift = keyflags & PRESSED_SHIFT;
389
        if (letter && capslock)
390
            shift = !shift;
391
        if (shift)
392
            map = sc_secondary_map;
511 jermar 393
        chardev_push_character(&kbrd, map[sc]);
508 jermar 394
        break;
395
    }
396
    spinlock_unlock(&keylock);
397
}
511 jermar 398
 
399
/* Called from getc(). */
575 palkovsky 400
void i8042_resume(chardev_t *d)
511 jermar 401
{
402
}
403
 
404
/* Called from getc(). */
575 palkovsky 405
void i8042_suspend(chardev_t *d)
511 jermar 406
{
407
}
878 vana 408
 
409
static __u8 active_read_buff_read(void)
410
{
411
    static int i=0;
412
    i&=(ACTIVE_READ_BUFF_SIZE-1);
413
    if(!active_read_buff[i])
414
    {
415
        return 0;
416
    }
417
    return active_read_buff[i++];
418
}
419
 
420
static void active_read_buff_write(__u8 ch)
421
{
422
    static int i=0;
423
    active_read_buff[i]=ch;
424
    i++;
425
    i&=(ACTIVE_READ_BUFF_SIZE-1);
426
    active_read_buff[i]=0;
427
}
428
 
429
 
893 jermar 430
static void active_read_key_pressed(__u8 sc)
878 vana 431
{
432
    char *map = sc_primary_map;
433
    char ascii = sc_primary_map[sc];
434
    bool shift, capslock;
435
    bool letter = false;
436
 
437
    /*spinlock_lock(&keylock);*/
438
    switch (sc) {
439
    case SC_LSHIFT:
440
    case SC_RSHIFT:
441
            keyflags |= PRESSED_SHIFT;
442
        break;
443
    case SC_CAPSLOCK:
444
        keyflags |= PRESSED_CAPSLOCK;
445
        break;
446
    case SC_SPEC_ESCAPE:
447
        break;
448
    case SC_LEFTARR:
449
        active_read_buff_write(0x1b);
450
        active_read_buff_write(0x5b);
451
        active_read_buff_write(0x44);
452
        break;
453
    case SC_RIGHTARR:
454
        active_read_buff_write(0x1b);
455
        active_read_buff_write(0x5b);
456
        active_read_buff_write(0x43);
457
        break;
458
    case SC_UPARR:
459
        active_read_buff_write(0x1b);
460
        active_read_buff_write(0x5b);
461
        active_read_buff_write(0x41);
462
        break;
463
    case SC_DOWNARR:
464
        active_read_buff_write(0x1b);
465
        active_read_buff_write(0x5b);
466
        active_read_buff_write(0x42);
467
        break;
468
    case SC_HOME:
469
        active_read_buff_write(0x1b);
470
        active_read_buff_write(0x4f);
471
        active_read_buff_write(0x48);
472
        break;
473
    case SC_END:
474
        active_read_buff_write(0x1b);
475
        active_read_buff_write(0x4f);
476
        active_read_buff_write(0x46);
477
        break;
478
    case SC_DELETE:
479
        active_read_buff_write(0x1b);
480
        active_read_buff_write(0x5b);
481
        active_read_buff_write(0x33);
482
        active_read_buff_write(0x7e);
483
        break;
484
    default:
485
            letter = is_lower(ascii);
486
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
487
        shift = keyflags & PRESSED_SHIFT;
488
        if (letter && capslock)
489
            shift = !shift;
490
        if (shift)
491
            map = sc_secondary_map;
492
        active_read_buff_write(map[sc]);
493
        break;
494
    }
495
    /*spinlock_unlock(&keylock);*/
496
 
497
}
498
 
499
static char key_read(chardev_t *d)
500
{
501
    char ch;   
502
 
503
    while(!(ch=active_read_buff_read()))
504
    {
505
        __u8 x;
506
        while (!((x=inb(i8042_STATUS))&i8042_BUFFER_FULL_MASK));
507
        x = inb(i8042_DATA);
508
        if (x & KEY_RELEASE)
509
            key_released(x ^ KEY_RELEASE);
510
        else
893 jermar 511
            active_read_key_pressed(x);
878 vana 512
    }
513
    return ch;
514
}