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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
 
894 jermar 29
#include <genarch/i8042/i8042.h>
30
#include <arch/drivers/i8042.h>
1 jermar 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
 
512 jermar 48
/** Keyboard commands. */
49
#define KBD_ENABLE  0xf4
50
#define KBD_DISABLE 0xf5
51
#define KBD_ACK     0xfa
52
 
670 vana 53
/*
893 jermar 54
 * 60  Write 8042 Command Byte: next data byte written to port 60h is
895 jermar 55
 *     placed in 8042 command register. Format:
893 jermar 56
 *
57
 *    |7|6|5|4|3|2|1|0|8042 Command Byte
58
 *     | | | | | | | `---- 1=enable output register full interrupt
59
 *     | | | | | | `----- should be 0
60
 *     | | | | | `------ 1=set status register system, 0=clear
61
 *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
62
 *     | | | `-------- disable keyboard I/O by driving clock line low
63
 *     | | `--------- disable auxiliary device, drives clock line low
64
 *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
65
 *     `----------- reserved, should be 0
66
 */
670 vana 67
 
893 jermar 68
#define i8042_SET_COMMAND   0x60
69
#define i8042_COMMAND       0x49
894 jermar 70
 
71
#define i8042_BUFFER_FULL_MASK  0x01
893 jermar 72
#define i8042_WAIT_MASK     0x02
670 vana 73
 
508 jermar 74
#define SPECIAL     '?'
75
#define KEY_RELEASE 0x80
76
 
895 jermar 77
/**
78
 * These codes read from i8042 data register are silently ignored.
79
 */
80
#define IGNORE_CODE 0x7f
81
 
508 jermar 82
static void key_released(__u8 sc);
83
static void key_pressed(__u8 sc);
878 vana 84
static char key_read(chardev_t *d);
508 jermar 85
 
86
#define PRESSED_SHIFT       (1<<0)
87
#define PRESSED_CAPSLOCK    (1<<1)
88
#define LOCKED_CAPSLOCK     (1<<0)
89
 
894 jermar 90
#define ACTIVE_READ_BUFF_SIZE 16    /* Must be power of 2 */
878 vana 91
 
894 jermar 92
static __u8 active_read_buff[ACTIVE_READ_BUFF_SIZE];
878 vana 93
 
623 jermar 94
SPINLOCK_INITIALIZE(keylock);       /**< keylock protects keyflags and lockflags. */
508 jermar 95
static volatile int keyflags;       /**< Tracking of multiple keypresses. */
509 jermar 96
static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
508 jermar 97
 
575 palkovsky 98
static void i8042_suspend(chardev_t *);
99
static void i8042_resume(chardev_t *);
511 jermar 100
 
101
static chardev_t kbrd;
102
static chardev_operations_t ops = {
103
    .suspend = i8042_suspend,
878 vana 104
    .resume = i8042_resume,
105
    .read = key_read
511 jermar 106
};
107
 
508 jermar 108
/** Primary meaning of scancodes. */
109
static char sc_primary_map[] = {
110
    SPECIAL, /* 0x00 */
111
    SPECIAL, /* 0x01 - Esc */
112
    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
588 palkovsky 113
    '\b', /* 0x0e - Backspace */
508 jermar 114
    '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
115
    SPECIAL, /* 0x1d - LCtrl */
116
    'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
117
    '`',
118
    SPECIAL, /* 0x2a - LShift */
119
    '\\',
120
    'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
121
    SPECIAL, /* 0x36 - RShift */
122
    '*',
123
    SPECIAL, /* 0x38 - LAlt */
124
    ' ',
125
    SPECIAL, /* 0x3a - CapsLock */
126
    SPECIAL, /* 0x3b - F1 */
127
    SPECIAL, /* 0x3c - F2 */
128
    SPECIAL, /* 0x3d - F3 */
129
    SPECIAL, /* 0x3e - F4 */
130
    SPECIAL, /* 0x3f - F5 */
131
    SPECIAL, /* 0x40 - F6 */
132
    SPECIAL, /* 0x41 - F7 */
133
    SPECIAL, /* 0x42 - F8 */
134
    SPECIAL, /* 0x43 - F9 */
135
    SPECIAL, /* 0x44 - F10 */
136
    SPECIAL, /* 0x45 - NumLock */
137
    SPECIAL, /* 0x46 - ScrollLock */
138
    '7', '8', '9', '-',
139
    '4', '5', '6', '+',
140
    '1', '2', '3',
141
    '0', '.',
142
    SPECIAL, /* 0x54 - Alt-SysRq */
143
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
144
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
145
    SPECIAL, /* 0x57 - F11 */
146
    SPECIAL, /* 0x58 - F12 */
147
    SPECIAL, /* 0x59 */
148
    SPECIAL, /* 0x5a */
149
    SPECIAL, /* 0x5b */
150
    SPECIAL, /* 0x5c */
151
    SPECIAL, /* 0x5d */
152
    SPECIAL, /* 0x5e */
153
    SPECIAL, /* 0x5f */
154
    SPECIAL, /* 0x60 */
155
    SPECIAL, /* 0x61 */
156
    SPECIAL, /* 0x62 */
157
    SPECIAL, /* 0x63 */
158
    SPECIAL, /* 0x64 */
159
    SPECIAL, /* 0x65 */
160
    SPECIAL, /* 0x66 */
161
    SPECIAL, /* 0x67 */
162
    SPECIAL, /* 0x68 */
163
    SPECIAL, /* 0x69 */
164
    SPECIAL, /* 0x6a */
165
    SPECIAL, /* 0x6b */
166
    SPECIAL, /* 0x6c */
167
    SPECIAL, /* 0x6d */
168
    SPECIAL, /* 0x6e */
169
    SPECIAL, /* 0x6f */
170
    SPECIAL, /* 0x70 */
171
    SPECIAL, /* 0x71 */
172
    SPECIAL, /* 0x72 */
173
    SPECIAL, /* 0x73 */
174
    SPECIAL, /* 0x74 */
175
    SPECIAL, /* 0x75 */
176
    SPECIAL, /* 0x76 */
177
    SPECIAL, /* 0x77 */
178
    SPECIAL, /* 0x78 */
179
    SPECIAL, /* 0x79 */
180
    SPECIAL, /* 0x7a */
181
    SPECIAL, /* 0x7b */
182
    SPECIAL, /* 0x7c */
183
    SPECIAL, /* 0x7d */
184
    SPECIAL, /* 0x7e */
185
    SPECIAL, /* 0x7f */
186
};
187
 
188
/** Secondary meaning of scancodes. */
189
static char sc_secondary_map[] = {
190
    SPECIAL, /* 0x00 */
191
    SPECIAL, /* 0x01 - Esc */
192
    '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
193
    SPECIAL, /* 0x0e - Backspace */
194
    '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
195
    SPECIAL, /* 0x1d - LCtrl */
196
    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
197
    '~',
198
    SPECIAL, /* 0x2a - LShift */
199
    '|',
200
    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
201
    SPECIAL, /* 0x36 - RShift */
202
    '*',
203
    SPECIAL, /* 0x38 - LAlt */
204
    ' ',
205
    SPECIAL, /* 0x3a - CapsLock */
206
    SPECIAL, /* 0x3b - F1 */
207
    SPECIAL, /* 0x3c - F2 */
208
    SPECIAL, /* 0x3d - F3 */
209
    SPECIAL, /* 0x3e - F4 */
210
    SPECIAL, /* 0x3f - F5 */
211
    SPECIAL, /* 0x40 - F6 */
212
    SPECIAL, /* 0x41 - F7 */
213
    SPECIAL, /* 0x42 - F8 */
214
    SPECIAL, /* 0x43 - F9 */
215
    SPECIAL, /* 0x44 - F10 */
216
    SPECIAL, /* 0x45 - NumLock */
217
    SPECIAL, /* 0x46 - ScrollLock */
218
    '7', '8', '9', '-',
219
    '4', '5', '6', '+',
220
    '1', '2', '3',
221
    '0', '.',
222
    SPECIAL, /* 0x54 - Alt-SysRq */
223
    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
224
    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
225
    SPECIAL, /* 0x57 - F11 */
226
    SPECIAL, /* 0x58 - F12 */
227
    SPECIAL, /* 0x59 */
228
    SPECIAL, /* 0x5a */
229
    SPECIAL, /* 0x5b */
230
    SPECIAL, /* 0x5c */
231
    SPECIAL, /* 0x5d */
232
    SPECIAL, /* 0x5e */
233
    SPECIAL, /* 0x5f */
234
    SPECIAL, /* 0x60 */
235
    SPECIAL, /* 0x61 */
236
    SPECIAL, /* 0x62 */
237
    SPECIAL, /* 0x63 */
238
    SPECIAL, /* 0x64 */
239
    SPECIAL, /* 0x65 */
240
    SPECIAL, /* 0x66 */
241
    SPECIAL, /* 0x67 */
242
    SPECIAL, /* 0x68 */
243
    SPECIAL, /* 0x69 */
244
    SPECIAL, /* 0x6a */
245
    SPECIAL, /* 0x6b */
246
    SPECIAL, /* 0x6c */
247
    SPECIAL, /* 0x6d */
248
    SPECIAL, /* 0x6e */
249
    SPECIAL, /* 0x6f */
250
    SPECIAL, /* 0x70 */
251
    SPECIAL, /* 0x71 */
252
    SPECIAL, /* 0x72 */
253
    SPECIAL, /* 0x73 */
254
    SPECIAL, /* 0x74 */
255
    SPECIAL, /* 0x75 */
256
    SPECIAL, /* 0x76 */
257
    SPECIAL, /* 0x77 */
258
    SPECIAL, /* 0x78 */
259
    SPECIAL, /* 0x79 */
260
    SPECIAL, /* 0x7a */
261
    SPECIAL, /* 0x7b */
262
    SPECIAL, /* 0x7c */
263
    SPECIAL, /* 0x7d */
264
    SPECIAL, /* 0x7e */
265
    SPECIAL, /* 0x7f */
266
};
267
 
958 jermar 268
static void i8042_interrupt(int n, istate_t *istate);
895 jermar 269
static void i8042_wait(void);
576 palkovsky 270
 
508 jermar 271
/** Initialize i8042. */
1 jermar 272
void i8042_init(void)
273
{
958 jermar 274
    exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
895 jermar 275
    i8042_wait();
894 jermar 276
    i8042_command_write(i8042_SET_COMMAND);
895 jermar 277
    i8042_wait();
894 jermar 278
    i8042_data_write(i8042_COMMAND);
895 jermar 279
    i8042_wait();
670 vana 280
 
512 jermar 281
    trap_virtual_enable_irqs(1<<IRQ_KBD);
575 palkovsky 282
    chardev_initialize("i8042_kbd", &kbrd, &ops);
511 jermar 283
    stdin = &kbrd;
1193 vana 284
    {
285
        int a=0;
286
        while(a<20) {i8042_data_read();a++;}  /*Clear input buffer*/
287
    }
1 jermar 288
}
289
 
508 jermar 290
/** Process i8042 interrupt.
291
 *
292
 * @param n Interrupt vector.
293
 * @param stack Interrupted stack.
294
 */
958 jermar 295
void i8042_interrupt(int n, istate_t *istate)
1 jermar 296
{
297
    __u8 x;
298
 
299
    trap_virtual_eoi();
894 jermar 300
    x = i8042_data_read();
508 jermar 301
    if (x & KEY_RELEASE)
302
        key_released(x ^ KEY_RELEASE);
303
    else
304
        key_pressed(x);
1 jermar 305
}
508 jermar 306
 
895 jermar 307
/** Wait until the controller reads its data. */
308
void i8042_wait(void) {
309
    while (i8042_status_read() & i8042_WAIT_MASK) {
310
        /* wait */
311
    }
312
}
313
 
508 jermar 314
/** Process release of key.
315
 *
316
 * @param sc Scancode of the key being released.
317
 */
318
void key_released(__u8 sc)
319
{
320
    spinlock_lock(&keylock);
321
    switch (sc) {
322
        case SC_LSHIFT:
323
        case SC_RSHIFT:
324
        keyflags &= ~PRESSED_SHIFT;
325
        break;
326
        case SC_CAPSLOCK:
327
        keyflags &= ~PRESSED_CAPSLOCK;
328
        if (lockflags & LOCKED_CAPSLOCK)
329
            lockflags &= ~LOCKED_CAPSLOCK;
330
        else
331
            lockflags |= LOCKED_CAPSLOCK;
332
        break;
333
        default:
334
        break;
335
    }
336
    spinlock_unlock(&keylock);
337
}
338
 
339
/** Process keypress.
340
 *
341
 * @param sc Scancode of the key being pressed.
342
 */
343
void key_pressed(__u8 sc)
344
{
345
    char *map = sc_primary_map;
346
    char ascii = sc_primary_map[sc];
347
    bool shift, capslock;
348
    bool letter = false;
349
 
350
    spinlock_lock(&keylock);
351
    switch (sc) {
601 palkovsky 352
    case SC_LSHIFT:
353
    case SC_RSHIFT:
508 jermar 354
            keyflags |= PRESSED_SHIFT;
355
        break;
601 palkovsky 356
    case SC_CAPSLOCK:
508 jermar 357
        keyflags |= PRESSED_CAPSLOCK;
358
        break;
601 palkovsky 359
    case SC_SPEC_ESCAPE:
360
        break;
361
    case SC_LEFTARR:
362
        chardev_push_character(&kbrd, 0x1b);
363
        chardev_push_character(&kbrd, 0x5b);
364
        chardev_push_character(&kbrd, 0x44);
365
        break;
366
    case SC_RIGHTARR:
367
        chardev_push_character(&kbrd, 0x1b);
368
        chardev_push_character(&kbrd, 0x5b);
369
        chardev_push_character(&kbrd, 0x43);
370
        break;
371
    case SC_UPARR:
372
        chardev_push_character(&kbrd, 0x1b);
373
        chardev_push_character(&kbrd, 0x5b);
374
        chardev_push_character(&kbrd, 0x41);
375
        break;
376
    case SC_DOWNARR:
377
        chardev_push_character(&kbrd, 0x1b);
378
        chardev_push_character(&kbrd, 0x5b);
379
        chardev_push_character(&kbrd, 0x42);
380
        break;
606 palkovsky 381
    case SC_HOME:
382
        chardev_push_character(&kbrd, 0x1b);
383
        chardev_push_character(&kbrd, 0x4f);
384
        chardev_push_character(&kbrd, 0x48);
385
        break;
386
    case SC_END:
387
        chardev_push_character(&kbrd, 0x1b);
388
        chardev_push_character(&kbrd, 0x4f);
389
        chardev_push_character(&kbrd, 0x46);
390
        break;
391
    case SC_DELETE:
392
        chardev_push_character(&kbrd, 0x1b);
393
        chardev_push_character(&kbrd, 0x5b);
394
        chardev_push_character(&kbrd, 0x33);
395
        chardev_push_character(&kbrd, 0x7e);
396
        break;
601 palkovsky 397
    default:
517 jermar 398
            letter = is_lower(ascii);
508 jermar 399
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
400
        shift = keyflags & PRESSED_SHIFT;
401
        if (letter && capslock)
402
            shift = !shift;
403
        if (shift)
404
            map = sc_secondary_map;
511 jermar 405
        chardev_push_character(&kbrd, map[sc]);
508 jermar 406
        break;
407
    }
408
    spinlock_unlock(&keylock);
409
}
511 jermar 410
 
411
/* Called from getc(). */
575 palkovsky 412
void i8042_resume(chardev_t *d)
511 jermar 413
{
414
}
415
 
416
/* Called from getc(). */
575 palkovsky 417
void i8042_suspend(chardev_t *d)
511 jermar 418
{
419
}
878 vana 420
 
421
static __u8 active_read_buff_read(void)
422
{
423
    static int i=0;
894 jermar 424
    i &= (ACTIVE_READ_BUFF_SIZE-1);
425
    if(!active_read_buff[i]) {
878 vana 426
        return 0;
427
    }
428
    return active_read_buff[i++];
429
}
430
 
431
static void active_read_buff_write(__u8 ch)
432
{
433
    static int i=0;
894 jermar 434
    active_read_buff[i] = ch;
878 vana 435
    i++;
894 jermar 436
    i &= (ACTIVE_READ_BUFF_SIZE-1);
878 vana 437
    active_read_buff[i]=0;
438
}
439
 
440
 
893 jermar 441
static void active_read_key_pressed(__u8 sc)
878 vana 442
{
443
    char *map = sc_primary_map;
444
    char ascii = sc_primary_map[sc];
445
    bool shift, capslock;
446
    bool letter = false;
447
 
448
    /*spinlock_lock(&keylock);*/
449
    switch (sc) {
450
    case SC_LSHIFT:
451
    case SC_RSHIFT:
452
            keyflags |= PRESSED_SHIFT;
453
        break;
454
    case SC_CAPSLOCK:
455
        keyflags |= PRESSED_CAPSLOCK;
456
        break;
457
    case SC_SPEC_ESCAPE:
458
        break;
459
    case SC_LEFTARR:
460
        active_read_buff_write(0x1b);
461
        active_read_buff_write(0x5b);
462
        active_read_buff_write(0x44);
463
        break;
464
    case SC_RIGHTARR:
465
        active_read_buff_write(0x1b);
466
        active_read_buff_write(0x5b);
467
        active_read_buff_write(0x43);
468
        break;
469
    case SC_UPARR:
470
        active_read_buff_write(0x1b);
471
        active_read_buff_write(0x5b);
472
        active_read_buff_write(0x41);
473
        break;
474
    case SC_DOWNARR:
475
        active_read_buff_write(0x1b);
476
        active_read_buff_write(0x5b);
477
        active_read_buff_write(0x42);
478
        break;
479
    case SC_HOME:
480
        active_read_buff_write(0x1b);
481
        active_read_buff_write(0x4f);
482
        active_read_buff_write(0x48);
483
        break;
484
    case SC_END:
485
        active_read_buff_write(0x1b);
486
        active_read_buff_write(0x4f);
487
        active_read_buff_write(0x46);
488
        break;
489
    case SC_DELETE:
490
        active_read_buff_write(0x1b);
491
        active_read_buff_write(0x5b);
492
        active_read_buff_write(0x33);
493
        active_read_buff_write(0x7e);
494
        break;
495
    default:
496
            letter = is_lower(ascii);
497
        capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
498
        shift = keyflags & PRESSED_SHIFT;
499
        if (letter && capslock)
500
            shift = !shift;
501
        if (shift)
502
            map = sc_secondary_map;
503
        active_read_buff_write(map[sc]);
504
        break;
505
    }
506
    /*spinlock_unlock(&keylock);*/
507
 
508
}
509
 
510
static char key_read(chardev_t *d)
511
{
512
    char ch;   
513
 
894 jermar 514
    while(!(ch = active_read_buff_read())) {
878 vana 515
        __u8 x;
894 jermar 516
        while (!((x=i8042_status_read() & i8042_BUFFER_FULL_MASK)))
517
            ;
518
        x = i8042_data_read();
895 jermar 519
        if (x != IGNORE_CODE) {
520
            if (x & KEY_RELEASE)
521
                key_released(x ^ KEY_RELEASE);
522
            else
523
                active_read_key_pressed(x);
524
        }
878 vana 525
    }
526
    return ch;
527
}
895 jermar 528
 
529
/** Poll for key press and release events.
530
 *
531
 * This function can be used to implement keyboard polling.
532
 */
533
void i8042_poll(void)
534
{
535
    __u8 x;
536
 
537
    while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
538
        x = i8042_data_read();
539
        if (x != IGNORE_CODE) {
540
            if (x & KEY_RELEASE)
541
                key_released(x ^ KEY_RELEASE);
542
            else
543
                key_pressed(x);
544
        }
545
    }
546
}