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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
Line 29... | Line 29... | ||
29 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief i8042 processor driver. |
34 | * @brief Scan codes for pc keyboards. |
35 | * |
- | |
36 | * It takes care of low-level keyboard functions. |
- | |
37 | */ |
35 | */ |
38 | 36 | ||
39 | #include <genarch/i8042/i8042.h> |
37 | #include <genarch/i8042/i8042.h> |
40 | #include <arch/drivers/i8042.h> |
- | |
41 | #include <arch/interrupt.h> |
- | |
42 | #include <cpu.h> |
- | |
43 | #include <arch/asm.h> |
- | |
44 | #include <arch.h> |
- | |
45 | #include <synch/spinlock.h> |
- | |
46 | #include <typedefs.h> |
- | |
47 | #include <console/chardev.h> |
- | |
48 | #include <console/console.h> |
- | |
49 | #include <macros.h> |
- | |
50 | #include <interrupt.h> |
- | |
51 | - | ||
52 | /* Keyboard commands. */ |
- | |
53 | #define KBD_ENABLE 0xf4 |
- | |
54 | #define KBD_DISABLE 0xf5 |
- | |
55 | #define KBD_ACK 0xfa |
- | |
56 | - | ||
57 | /* |
- | |
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 | */ |
- | |
71 | - | ||
72 | #define i8042_SET_COMMAND 0x60 |
- | |
73 | #define i8042_COMMAND 0x69 |
- | |
74 | - | ||
75 | #define i8042_BUFFER_FULL_MASK 0x01 |
- | |
76 | #define i8042_WAIT_MASK 0x02 |
- | |
77 | #define i8042_MOUSE_DATA 0x20 |
- | |
78 | - | ||
79 | #define SPECIAL '?' |
- | |
80 | #define KEY_RELEASE 0x80 |
- | |
81 | - | ||
82 | /** |
- | |
83 | * These codes read from i8042 data register are silently ignored. |
- | |
84 | */ |
- | |
85 | #define IGNORE_CODE 0x7f |
- | |
86 | - | ||
87 | static void key_released(uint8_t sc); |
- | |
88 | static void key_pressed(uint8_t sc); |
- | |
89 | static char key_read(chardev_t *d); |
- | |
90 | - | ||
91 | #define PRESSED_SHIFT (1<<0) |
- | |
92 | #define PRESSED_CAPSLOCK (1<<1) |
- | |
93 | #define LOCKED_CAPSLOCK (1<<0) |
- | |
94 | - | ||
95 | #define ACTIVE_READ_BUFF_SIZE 16 /* Must be power of 2 */ |
- | |
96 | - | ||
97 | static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE]; |
- | |
98 | - | ||
99 | SPINLOCK_INITIALIZE(keylock); /**< keylock protects keyflags and lockflags. */ |
- | |
100 | static volatile int keyflags; /**< Tracking of multiple keypresses. */ |
- | |
101 | static volatile int lockflags; /**< Tracking of multiple keys lockings. */ |
- | |
102 | - | ||
103 | static void i8042_suspend(chardev_t *); |
- | |
104 | static void i8042_resume(chardev_t *); |
- | |
105 | - | ||
106 | static chardev_t kbrd; |
- | |
107 | static chardev_operations_t ops = { |
- | |
108 | .suspend = i8042_suspend, |
- | |
109 | .resume = i8042_resume, |
- | |
110 | .read = key_read |
- | |
111 | }; |
- | |
112 | 38 | ||
113 | /** Primary meaning of scancodes. */ |
39 | /** Primary meaning of scancodes. */ |
114 | static char sc_primary_map[] = { |
40 | char sc_primary_map[] = { |
115 | SPECIAL, /* 0x00 */ |
41 | SPECIAL, /* 0x00 */ |
116 | SPECIAL, /* 0x01 - Esc */ |
42 | SPECIAL, /* 0x01 - Esc */ |
117 | '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
43 | '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', |
118 | '\b', /* 0x0e - Backspace */ |
44 | '\b', /* 0x0e - Backspace */ |
119 | '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', |
45 | '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n', |
Line 189... | Line 115... | ||
189 | SPECIAL, /* 0x7e */ |
115 | SPECIAL, /* 0x7e */ |
190 | SPECIAL, /* 0x7f */ |
116 | SPECIAL, /* 0x7f */ |
191 | }; |
117 | }; |
192 | 118 | ||
193 | /** Secondary meaning of scancodes. */ |
119 | /** Secondary meaning of scancodes. */ |
194 | static char sc_secondary_map[] = { |
120 | char sc_secondary_map[] = { |
195 | SPECIAL, /* 0x00 */ |
121 | SPECIAL, /* 0x00 */ |
196 | SPECIAL, /* 0x01 - Esc */ |
122 | SPECIAL, /* 0x01 - Esc */ |
197 | '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', |
123 | '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', |
198 | SPECIAL, /* 0x0e - Backspace */ |
124 | SPECIAL, /* 0x0e - Backspace */ |
199 | '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', |
125 | '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n', |
Line 268... | Line 194... | ||
268 | SPECIAL, /* 0x7d */ |
194 | SPECIAL, /* 0x7d */ |
269 | SPECIAL, /* 0x7e */ |
195 | SPECIAL, /* 0x7e */ |
270 | SPECIAL, /* 0x7f */ |
196 | SPECIAL, /* 0x7f */ |
271 | }; |
197 | }; |
272 | 198 | ||
273 | static void i8042_interrupt(int n, istate_t *istate); |
- | |
274 | static void i8042_wait(void); |
- | |
275 | - | ||
276 | static iroutine oldvector; |
- | |
277 | /** Initialize keyboard and service interrupts using kernel routine */ |
- | |
278 | void i8042_grab(void) |
- | |
279 | { |
- | |
280 | oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt); |
- | |
281 | i8042_wait(); |
- | |
282 | i8042_command_write(i8042_SET_COMMAND); |
- | |
283 | i8042_wait(); |
- | |
284 | i8042_data_write(i8042_COMMAND); |
- | |
285 | i8042_wait(); |
- | |
286 | } |
- | |
287 | /** Resume the former interrupt vector */ |
- | |
288 | void i8042_release(void) |
- | |
289 | { |
- | |
290 | if (oldvector) |
- | |
291 | exc_register(VECTOR_KBD, "user_interrupt", oldvector); |
- | |
292 | } |
- | |
293 | - | ||
294 | /** Initialize i8042. */ |
- | |
295 | void i8042_init(void) |
- | |
296 | { |
- | |
297 | int i; |
- | |
298 | - | ||
299 | i8042_grab(); |
- | |
300 | /* Prevent user from accidentaly releasing calling i8042_resume |
- | |
301 | * and disabling keyboard |
- | |
302 | */ |
- | |
303 | oldvector = NULL; |
- | |
304 | - | ||
305 | trap_virtual_enable_irqs(1<<IRQ_KBD); |
- | |
306 | chardev_initialize("i8042_kbd", &kbrd, &ops); |
- | |
307 | stdin = &kbrd; |
- | |
308 | - | ||
309 | /* |
- | |
310 | * Clear input buffer. |
- | |
311 | * Number of iterations is limited to prevent infinite looping. |
- | |
312 | */ |
- | |
313 | for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) { |
- | |
314 | i8042_data_read(); |
- | |
315 | } |
- | |
316 | } |
- | |
317 | - | ||
318 | /** Process i8042 interrupt. |
- | |
319 | * |
- | |
320 | * @param n Interrupt vector. |
- | |
321 | * @param istate Interrupted state. |
- | |
322 | */ |
- | |
323 | void i8042_interrupt(int n, istate_t *istate) |
- | |
324 | { |
- | |
325 | uint8_t x; |
- | |
326 | uint8_t status; |
- | |
327 | - | ||
328 | while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) { |
- | |
329 | x = i8042_data_read(); |
- | |
330 | - | ||
331 | if ((status & i8042_MOUSE_DATA)) |
- | |
332 | continue; |
- | |
333 | - | ||
334 | if (x & KEY_RELEASE) |
- | |
335 | key_released(x ^ KEY_RELEASE); |
- | |
336 | else |
- | |
337 | key_pressed(x); |
- | |
338 | } |
- | |
339 | trap_virtual_eoi(); |
- | |
340 | } |
- | |
341 | - | ||
342 | /** Wait until the controller reads its data. */ |
- | |
343 | void i8042_wait(void) { |
- | |
344 | while (i8042_status_read() & i8042_WAIT_MASK) { |
- | |
345 | /* wait */ |
- | |
346 | } |
- | |
347 | } |
- | |
348 | - | ||
349 | /** Process release of key. |
- | |
350 | * |
- | |
351 | * @param sc Scancode of the key being released. |
- | |
352 | */ |
- | |
353 | void key_released(uint8_t sc) |
- | |
354 | { |
- | |
355 | spinlock_lock(&keylock); |
- | |
356 | switch (sc) { |
- | |
357 | case SC_LSHIFT: |
- | |
358 | case SC_RSHIFT: |
- | |
359 | keyflags &= ~PRESSED_SHIFT; |
- | |
360 | break; |
- | |
361 | case SC_CAPSLOCK: |
- | |
362 | keyflags &= ~PRESSED_CAPSLOCK; |
- | |
363 | if (lockflags & LOCKED_CAPSLOCK) |
- | |
364 | lockflags &= ~LOCKED_CAPSLOCK; |
- | |
365 | else |
- | |
366 | lockflags |= LOCKED_CAPSLOCK; |
- | |
367 | break; |
- | |
368 | default: |
- | |
369 | break; |
- | |
370 | } |
- | |
371 | spinlock_unlock(&keylock); |
- | |
372 | } |
- | |
373 | - | ||
374 | /** Process keypress. |
- | |
375 | * |
- | |
376 | * @param sc Scancode of the key being pressed. |
- | |
377 | */ |
- | |
378 | void key_pressed(uint8_t sc) |
- | |
379 | { |
- | |
380 | char *map = sc_primary_map; |
- | |
381 | char ascii = sc_primary_map[sc]; |
- | |
382 | bool shift, capslock; |
- | |
383 | bool letter = false; |
- | |
384 | - | ||
385 | spinlock_lock(&keylock); |
- | |
386 | switch (sc) { |
- | |
387 | case SC_LSHIFT: |
- | |
388 | case SC_RSHIFT: |
- | |
389 | keyflags |= PRESSED_SHIFT; |
- | |
390 | break; |
- | |
391 | case SC_CAPSLOCK: |
- | |
392 | keyflags |= PRESSED_CAPSLOCK; |
- | |
393 | break; |
- | |
394 | case SC_SPEC_ESCAPE: |
- | |
395 | break; |
- | |
396 | case SC_LEFTARR: |
- | |
397 | chardev_push_character(&kbrd, 0x1b); |
- | |
398 | chardev_push_character(&kbrd, 0x5b); |
- | |
399 | chardev_push_character(&kbrd, 0x44); |
- | |
400 | break; |
- | |
401 | case SC_RIGHTARR: |
- | |
402 | chardev_push_character(&kbrd, 0x1b); |
- | |
403 | chardev_push_character(&kbrd, 0x5b); |
- | |
404 | chardev_push_character(&kbrd, 0x43); |
- | |
405 | break; |
- | |
406 | case SC_UPARR: |
- | |
407 | chardev_push_character(&kbrd, 0x1b); |
- | |
408 | chardev_push_character(&kbrd, 0x5b); |
- | |
409 | chardev_push_character(&kbrd, 0x41); |
- | |
410 | break; |
- | |
411 | case SC_DOWNARR: |
- | |
412 | chardev_push_character(&kbrd, 0x1b); |
- | |
413 | chardev_push_character(&kbrd, 0x5b); |
- | |
414 | chardev_push_character(&kbrd, 0x42); |
- | |
415 | break; |
- | |
416 | case SC_HOME: |
- | |
417 | chardev_push_character(&kbrd, 0x1b); |
- | |
418 | chardev_push_character(&kbrd, 0x4f); |
- | |
419 | chardev_push_character(&kbrd, 0x48); |
- | |
420 | break; |
- | |
421 | case SC_END: |
- | |
422 | chardev_push_character(&kbrd, 0x1b); |
- | |
423 | chardev_push_character(&kbrd, 0x4f); |
- | |
424 | chardev_push_character(&kbrd, 0x46); |
- | |
425 | break; |
- | |
426 | case SC_DELETE: |
- | |
427 | chardev_push_character(&kbrd, 0x1b); |
- | |
428 | chardev_push_character(&kbrd, 0x5b); |
- | |
429 | chardev_push_character(&kbrd, 0x33); |
- | |
430 | chardev_push_character(&kbrd, 0x7e); |
- | |
431 | break; |
- | |
432 | default: |
- | |
433 | letter = is_lower(ascii); |
- | |
434 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
- | |
435 | shift = keyflags & PRESSED_SHIFT; |
- | |
436 | if (letter && capslock) |
- | |
437 | shift = !shift; |
- | |
438 | if (shift) |
- | |
439 | map = sc_secondary_map; |
- | |
440 | chardev_push_character(&kbrd, map[sc]); |
- | |
441 | break; |
- | |
442 | } |
- | |
443 | spinlock_unlock(&keylock); |
- | |
444 | } |
- | |
445 | - | ||
446 | /* Called from getc(). */ |
- | |
447 | void i8042_resume(chardev_t *d) |
- | |
448 | { |
- | |
449 | } |
- | |
450 | - | ||
451 | /* Called from getc(). */ |
- | |
452 | void i8042_suspend(chardev_t *d) |
- | |
453 | { |
- | |
454 | } |
- | |
455 | - | ||
456 | static uint8_t active_read_buff_read(void) |
- | |
457 | { |
- | |
458 | static int i=0; |
- | |
459 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
- | |
460 | if(!active_read_buff[i]) { |
- | |
461 | return 0; |
- | |
462 | } |
- | |
463 | return active_read_buff[i++]; |
- | |
464 | } |
- | |
465 | - | ||
466 | static void active_read_buff_write(uint8_t ch) |
- | |
467 | { |
- | |
468 | static int i=0; |
- | |
469 | active_read_buff[i] = ch; |
- | |
470 | i++; |
- | |
471 | i &= (ACTIVE_READ_BUFF_SIZE-1); |
- | |
472 | active_read_buff[i]=0; |
- | |
473 | } |
- | |
474 | - | ||
475 | - | ||
476 | static void active_read_key_pressed(uint8_t sc) |
- | |
477 | { |
- | |
478 | char *map = sc_primary_map; |
- | |
479 | char ascii = sc_primary_map[sc]; |
- | |
480 | bool shift, capslock; |
- | |
481 | bool letter = false; |
- | |
482 | - | ||
483 | /*spinlock_lock(&keylock);*/ |
- | |
484 | switch (sc) { |
- | |
485 | case SC_LSHIFT: |
- | |
486 | case SC_RSHIFT: |
- | |
487 | keyflags |= PRESSED_SHIFT; |
- | |
488 | break; |
- | |
489 | case SC_CAPSLOCK: |
- | |
490 | keyflags |= PRESSED_CAPSLOCK; |
- | |
491 | break; |
- | |
492 | case SC_SPEC_ESCAPE: |
- | |
493 | break; |
- | |
494 | case SC_LEFTARR: |
- | |
495 | active_read_buff_write(0x1b); |
- | |
496 | active_read_buff_write(0x5b); |
- | |
497 | active_read_buff_write(0x44); |
- | |
498 | break; |
- | |
499 | case SC_RIGHTARR: |
- | |
500 | active_read_buff_write(0x1b); |
- | |
501 | active_read_buff_write(0x5b); |
- | |
502 | active_read_buff_write(0x43); |
- | |
503 | break; |
- | |
504 | case SC_UPARR: |
- | |
505 | active_read_buff_write(0x1b); |
- | |
506 | active_read_buff_write(0x5b); |
- | |
507 | active_read_buff_write(0x41); |
- | |
508 | break; |
- | |
509 | case SC_DOWNARR: |
- | |
510 | active_read_buff_write(0x1b); |
- | |
511 | active_read_buff_write(0x5b); |
- | |
512 | active_read_buff_write(0x42); |
- | |
513 | break; |
- | |
514 | case SC_HOME: |
- | |
515 | active_read_buff_write(0x1b); |
- | |
516 | active_read_buff_write(0x4f); |
- | |
517 | active_read_buff_write(0x48); |
- | |
518 | break; |
- | |
519 | case SC_END: |
- | |
520 | active_read_buff_write(0x1b); |
- | |
521 | active_read_buff_write(0x4f); |
- | |
522 | active_read_buff_write(0x46); |
- | |
523 | break; |
- | |
524 | case SC_DELETE: |
- | |
525 | active_read_buff_write(0x1b); |
- | |
526 | active_read_buff_write(0x5b); |
- | |
527 | active_read_buff_write(0x33); |
- | |
528 | active_read_buff_write(0x7e); |
- | |
529 | break; |
- | |
530 | default: |
- | |
531 | letter = is_lower(ascii); |
- | |
532 | capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK); |
- | |
533 | shift = keyflags & PRESSED_SHIFT; |
- | |
534 | if (letter && capslock) |
- | |
535 | shift = !shift; |
- | |
536 | if (shift) |
- | |
537 | map = sc_secondary_map; |
- | |
538 | active_read_buff_write(map[sc]); |
- | |
539 | break; |
- | |
540 | } |
- | |
541 | /*spinlock_unlock(&keylock);*/ |
- | |
542 | - | ||
543 | } |
- | |
544 | - | ||
545 | static char key_read(chardev_t *d) |
- | |
546 | { |
- | |
547 | char ch; |
- | |
548 | - | ||
549 | while(!(ch = active_read_buff_read())) { |
- | |
550 | uint8_t x; |
- | |
551 | while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK)) |
- | |
552 | ; |
- | |
553 | x = i8042_data_read(); |
- | |
554 | if (x != IGNORE_CODE) { |
- | |
555 | if (x & KEY_RELEASE) |
- | |
556 | key_released(x ^ KEY_RELEASE); |
- | |
557 | else |
- | |
558 | active_read_key_pressed(x); |
- | |
559 | } |
- | |
560 | } |
- | |
561 | return ch; |
- | |
562 | } |
- | |
563 | - | ||
564 | /** Poll for key press and release events. |
- | |
565 | * |
- | |
566 | * This function can be used to implement keyboard polling. |
- | |
567 | */ |
- | |
568 | void i8042_poll(void) |
- | |
569 | { |
- | |
570 | uint8_t x; |
- | |
571 | - | ||
572 | while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) { |
- | |
573 | x = i8042_data_read(); |
- | |
574 | if (x != IGNORE_CODE) { |
- | |
575 | if (x & KEY_RELEASE) |
- | |
576 | key_released(x ^ KEY_RELEASE); |
- | |
577 | else |
- | |
578 | key_pressed(x); |
- | |
579 | } |
- | |
580 | } |
- | |
581 | } |
- | |
582 | - | ||
583 | /** @} |
199 | /** @} |
584 | */ |
200 | */ |
585 | - |