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wdenkaffae2b2002-08-17 09:36:01 +00001/*
2 * (C) Copyright 2001
3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 *
23 *
24 * Source partly derived from:
25 * linux/drivers/char/pc_keyb.c
26 *
27 *
28 */
29#include <common.h>
30#include <asm/processor.h>
31#include <devices.h>
32#include "isa.h"
33#include "kbd.h"
34
35
36unsigned char kbd_read_status(void);
37unsigned char kbd_read_input(void);
38void kbd_send_data(unsigned char data);
39void disable_8259A_irq(unsigned int irq);
40void enable_8259A_irq(unsigned int irq);
41
42/* used only by send_data - set by keyboard_interrupt */
43
44
45#undef KBG_DEBUG
46
47#ifdef KBG_DEBUG
48#define PRINTF(fmt,args...) printf (fmt ,##args)
49#else
50#define PRINTF(fmt,args...)
51#endif
52
53#define KBD_STAT_KOBF 0x01
54#define KBD_STAT_IBF 0x02
55#define KBD_STAT_SYS 0x04
56#define KBD_STAT_CD 0x08
57#define KBD_STAT_LOCK 0x10
58#define KBD_STAT_MOBF 0x20
59#define KBD_STAT_TI_OUT 0x40
60#define KBD_STAT_PARERR 0x80
61
62#define KBD_INIT_TIMEOUT 1000 /* Timeout in ms for initializing the keyboard */
63#define KBC_TIMEOUT 250 /* Timeout in ms for sending to keyboard controller */
64#define KBD_TIMEOUT 2000 /* Timeout in ms for keyboard command acknowledge */
65/*
66 * Keyboard Controller Commands
67 */
68
69#define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
70#define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
71#define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
72#define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
73#define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
74#define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
75#define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
76#define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
77#define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
78#define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
79#define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
80 initiated by the auxiliary device */
81#define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
82
83/*
84 * Keyboard Commands
85 */
86
87#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
88#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
89#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
90#define KBD_CMD_DISABLE 0xF5 /* Disable scanning */
91#define KBD_CMD_RESET 0xFF /* Reset */
92
93/*
94 * Keyboard Replies
95 */
96
97#define KBD_REPLY_POR 0xAA /* Power on reset */
98#define KBD_REPLY_ACK 0xFA /* Command ACK */
99#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
100
101/*
102 * Status Register Bits
103 */
104
105#define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
106#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
107#define KBD_STAT_SELFTEST 0x04 /* Self test successful */
108#define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
109#define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
110#define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
111#define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
112#define KBD_STAT_PERR 0x80 /* Parity error */
113
114#define AUX_STAT_OBF (KBD_STAT_OBF | KBD_STAT_MOUSE_OBF)
115
116/*
117 * Controller Mode Register Bits
118 */
119
120#define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
121#define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
122#define KBD_MODE_SYS 0x04 /* The system flag (?) */
123#define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
124#define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
125#define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
126#define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
127#define KBD_MODE_RFU 0x80
128
129
130#define KDB_DATA_PORT 0x60
131#define KDB_COMMAND_PORT 0x64
132
133#define LED_SCR 0x01 /* scroll lock led */
134#define LED_CAP 0x04 /* caps lock led */
135#define LED_NUM 0x02 /* num lock led */
136
137#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
138
139
wdenkaffae2b2002-08-17 09:36:01 +0000140static volatile char kbd_buffer[KBD_BUFFER_LEN];
141static volatile int in_pointer = 0;
142static volatile int out_pointer = 0;
143
144
145static unsigned char num_lock = 0;
146static unsigned char caps_lock = 0;
147static unsigned char scroll_lock = 0;
148static unsigned char shift = 0;
149static unsigned char ctrl = 0;
150static unsigned char alt = 0;
151static unsigned char e0 = 0;
152static unsigned char leds = 0;
153
154#define DEVNAME "kbd"
155
156/* Simple translation table for the keys */
157
158static unsigned char kbd_plain_xlate[] = {
159 0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
160 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
161 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
162 'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
163 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
164 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
165 '\r',0xff,0xff
166 };
167
168static unsigned char kbd_shift_xlate[] = {
169 0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
170 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
171 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
172 'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
173 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
174 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
175 '\r',0xff,0xff
176 };
177
178static unsigned char kbd_ctrl_xlate[] = {
179 0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
180 0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
181 0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
182 0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
183 0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
184 '2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
185 '\r',0xff,0xff
186 };
187
188/******************************************************************
189 * Init
190 ******************************************************************/
191int isa_kbd_init(void)
192{
193 char* result;
194 result=kbd_initialize();
195 if(result==NULL) {
196 PRINTF("AT Keyboard initialized\n");
197 irq_install_handler(25, (interrupt_handler_t *)handle_isa_int, NULL);
198 isa_irq_install_handler(KBD_INTERRUPT, (interrupt_handler_t *)kbd_interrupt, NULL);
199 return (1);
200 }
201 else {
202 printf("%s\n",result);
203 return (-1);
204 }
205}
206
207#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
208extern int overwrite_console (void);
209#else
210int overwrite_console (void)
211{
212 return (0);
213}
214#endif
215
216int drv_isa_kbd_init (void)
217{
218 int error;
219 device_t kbddev ;
220 char *stdinname = getenv ("stdin");
221
222 if(isa_kbd_init()==-1)
223 return -1;
224 memset (&kbddev, 0, sizeof(kbddev));
225 strcpy(kbddev.name, DEVNAME);
226 kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
227 kbddev.putc = NULL ;
228 kbddev.puts = NULL ;
229 kbddev.getc = kbd_getc ;
230 kbddev.tstc = kbd_testc ;
231
232 error = device_register (&kbddev);
233 if(error==0) {
234 /* check if this is the standard input device */
235 if(strcmp(stdinname,DEVNAME)==0) {
236 /* reassign the console */
237 if(overwrite_console()) {
238 return 1;
239 }
240 error=console_assign(stdin,DEVNAME);
241 if(error==0)
242 return 1;
243 else
244 return error;
245 }
246 return 1;
247 }
248 return error;
249}
250
251/******************************************************************
252 * Queue handling
253 ******************************************************************/
254/* puts character in the queue and sets up the in and out pointer */
255void kbd_put_queue(char data)
256{
257 if((in_pointer+1)==KBD_BUFFER_LEN) {
258 if(out_pointer==0) {
259 return; /* buffer full */
260 } else{
261 in_pointer=0;
262 }
263 } else {
264 if((in_pointer+1)==out_pointer)
265 return; /* buffer full */
266 in_pointer++;
267 }
268 kbd_buffer[in_pointer]=data;
269 return;
270}
271
272/* test if a character is in the queue */
273int kbd_testc(void)
274{
275 if(in_pointer==out_pointer)
276 return(0); /* no data */
277 else
278 return(1);
279}
280/* gets the character from the queue */
281int kbd_getc(void)
282{
283 char c;
284 while(in_pointer==out_pointer);
285 if((out_pointer+1)==KBD_BUFFER_LEN)
286 out_pointer=0;
287 else
288 out_pointer++;
289 c=kbd_buffer[out_pointer];
290 return (int)c;
291
292}
293
294
295/* set LEDs */
296
297void kbd_set_leds(void)
298{
299 if(caps_lock==0)
300 leds&=~LED_CAP; /* switch caps_lock off */
301 else
302 leds|=LED_CAP; /* switch on LED */
303 if(num_lock==0)
304 leds&=~LED_NUM; /* switch LED off */
305 else
306 leds|=LED_NUM; /* switch on LED */
307 if(scroll_lock==0)
308 leds&=~LED_SCR; /* switch LED off */
309 else
310 leds|=LED_SCR; /* switch on LED */
311 kbd_send_data(KBD_CMD_SET_LEDS);
312 kbd_send_data(leds);
313}
314
315
316void handle_keyboard_event(unsigned char scancode)
317{
318 unsigned char keycode;
319
320 /* Convert scancode to keycode */
321 PRINTF("scancode %x\n",scancode);
322 if(scancode==0xe0) {
323 e0=1; /* special charakters */
324 return;
325 }
326 if(e0==1) {
327 e0=0; /* delete flag */
328 if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */
329 ((scancode&0x7F)==0x1D)|| /* the right alt key */
330 ((scancode&0x7F)==0x35)|| /* the right '/' key */
331 ((scancode&0x7F)==0x1C) )) /* the right enter key */
332 /* we swallow unknown e0 codes */
333 return;
334 }
335 /* special cntrl keys */
336 switch(scancode)
337 {
338 case 0x2A:
339 case 0x36: /* shift pressed */
340 shift=1;
341 return; /* do nothing else */
342 case 0xAA:
343 case 0xB6: /* shift released */
344 shift=0;
345 return; /* do nothing else */
346 case 0x38: /* alt pressed */
347 alt=1;
348 return; /* do nothing else */
349 case 0xB8: /* alt released */
350 alt=0;
351 return; /* do nothing else */
352 case 0x1d: /* ctrl pressed */
353 ctrl=1;
354 return; /* do nothing else */
355 case 0x9d: /* ctrl released */
356 ctrl=0;
357 return; /* do nothing else */
358 case 0x46: /* scrollock pressed */
359 scroll_lock=~scroll_lock;
360 kbd_set_leds();
361 return; /* do nothing else */
362 case 0x3A: /* capslock pressed */
363 caps_lock=~caps_lock;
364 kbd_set_leds();
365 return;
366 case 0x45: /* numlock pressed */
367 num_lock=~num_lock;
368 kbd_set_leds();
369 return;
370 case 0xC6: /* scroll lock released */
371 case 0xC5: /* num lock released */
372 case 0xBA: /* caps lock released */
373 return; /* just swallow */
374 }
375 if((scancode&0x80)==0x80) /* key released */
376 return;
377 /* now, decide which table we need */
378 if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
379 PRINTF("unkown scancode %X\n",scancode);
380 return; /* swallow it */
381 }
382 /* setup plain code first */
383 keycode=kbd_plain_xlate[scancode];
384 if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
385 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
386 PRINTF("unkown caps-locked scancode %X\n",scancode);
387 return; /* swallow it */
388 }
389 keycode=kbd_shift_xlate[scancode];
390 if(keycode<'A') { /* we only want the alphas capital */
391 keycode=kbd_plain_xlate[scancode];
392 }
393 }
394 if(shift==1) { /* shift overwrites caps_lock */
395 if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
396 PRINTF("unkown shifted scancode %X\n",scancode);
397 return; /* swallow it */
398 }
399 keycode=kbd_shift_xlate[scancode];
400 }
401 if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
402 if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
403 PRINTF("unkown ctrl scancode %X\n",scancode);
404 return; /* swallow it */
405 }
406 keycode=kbd_ctrl_xlate[scancode];
407 }
408 /* check if valid keycode */
409 if(keycode==0xff) {
410 PRINTF("unkown scancode %X\n",scancode);
411 return; /* swallow unknown codes */
412 }
413
414 kbd_put_queue(keycode);
415 PRINTF("%x\n",keycode);
416}
417
418/*
419 * This reads the keyboard status port, and does the
420 * appropriate action.
421 *
422 */
423unsigned char handle_kbd_event(void)
424{
425 unsigned char status = kbd_read_status();
426 unsigned int work = 10000;
427
428 while ((--work > 0) && (status & KBD_STAT_OBF)) {
429 unsigned char scancode;
430
431 scancode = kbd_read_input();
432
433 /* Error bytes must be ignored to make the
434 Synaptics touchpads compaq use work */
435 /* Ignore error bytes */
436 if (!(status & (KBD_STAT_GTO | KBD_STAT_PERR)))
437 {
438 if (status & KBD_STAT_MOUSE_OBF)
439 ; /* not supported: handle_mouse_event(scancode); */
440 else
441 handle_keyboard_event(scancode);
442 }
443 status = kbd_read_status();
444 }
445 if (!work)
446 PRINTF("pc_keyb: controller jammed (0x%02X).\n", status);
447 return status;
448}
449
450
wdenkaffae2b2002-08-17 09:36:01 +0000451/******************************************************************************
452 * Lowlevel Part of keyboard section
453 */
454unsigned char kbd_read_status(void)
455{
456 return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT));
457}
458
459unsigned char kbd_read_input(void)
460{
461 return(in8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT));
462}
463
464void kbd_write_command(unsigned char cmd)
465{
466 out8(CFG_ISA_IO_BASE_ADDRESS + KDB_COMMAND_PORT,cmd);
467}
468
469void kbd_write_output(unsigned char data)
470{
471 out8(CFG_ISA_IO_BASE_ADDRESS + KDB_DATA_PORT, data);
472}
473
474int kbd_read_data(void)
475{
476 int val;
477 unsigned char status;
478
479 val=-1;
480 status = kbd_read_status();
481 if (status & KBD_STAT_OBF) {
482 val = kbd_read_input();
483 if (status & (KBD_STAT_GTO | KBD_STAT_PERR))
484 val = -2;
485 }
486 return val;
487}
488
489int kbd_wait_for_input(void)
490{
491 unsigned long timeout;
492 int val;
493
494 timeout = KBD_TIMEOUT;
495 val=kbd_read_data();
496 while(val < 0)
497 {
498 if(timeout--==0)
499 return -1;
500 udelay(1000);
501 val=kbd_read_data();
502 }
503 return val;
504}
505
506
507int kb_wait(void)
508{
509 unsigned long timeout = KBC_TIMEOUT * 10;
510
511 do {
512 unsigned char status = handle_kbd_event();
513 if (!(status & KBD_STAT_IBF))
514 return 0; /* ok */
515 udelay(1000);
516 timeout--;
517 } while (timeout);
518 return 1;
519}
520
521void kbd_write_command_w(int data)
522{
523 if(kb_wait())
524 PRINTF("timeout in kbd_write_command_w\n");
525 kbd_write_command(data);
526}
527
528void kbd_write_output_w(int data)
529{
530 if(kb_wait())
531 PRINTF("timeout in kbd_write_output_w\n");
532 kbd_write_output(data);
533}
534
535void kbd_send_data(unsigned char data)
536{
537 unsigned char status;
538 disable_8259A_irq(1); /* disable interrupt */
539 kbd_write_output_w(data);
540 status = kbd_wait_for_input();
541 if (status == KBD_REPLY_ACK)
542 enable_8259A_irq(1); /* enable interrupt */
543}
544
545
546char * kbd_initialize(void)
547{
548 int status;
549
550 in_pointer = 0; /* delete in Buffer */
551 out_pointer = 0;
552 /*
553 * Test the keyboard interface.
554 * This seems to be the only way to get it going.
555 * If the test is successful a x55 is placed in the input buffer.
556 */
557 kbd_write_command_w(KBD_CCMD_SELF_TEST);
558 if (kbd_wait_for_input() != 0x55)
559 return "Kbd: failed self test";
560 /*
561 * Perform a keyboard interface test. This causes the controller
562 * to test the keyboard clock and data lines. The results of the
563 * test are placed in the input buffer.
564 */
565 kbd_write_command_w(KBD_CCMD_KBD_TEST);
566 if (kbd_wait_for_input() != 0x00)
567 return "Kbd: interface failed self test";
568 /*
569 * Enable the keyboard by allowing the keyboard clock to run.
570 */
571 kbd_write_command_w(KBD_CCMD_KBD_ENABLE);
572 status = kbd_wait_for_input();
573 /*
574 * Reset keyboard. If the read times out
575 * then the assumption is that no keyboard is
576 * plugged into the machine.
577 * This defaults the keyboard to scan-code set 2.
578 *
579 * Set up to try again if the keyboard asks for RESEND.
580 */
581 do {
582 kbd_write_output_w(KBD_CMD_RESET);
583 status = kbd_wait_for_input();
584 if (status == KBD_REPLY_ACK)
585 break;
586 if (status != KBD_REPLY_RESEND)
587 {
588 PRINTF("status: %X\n",status);
589 return "Kbd: reset failed, no ACK";
590 }
591 } while (1);
592 if (kbd_wait_for_input() != KBD_REPLY_POR)
593 return "Kbd: reset failed, no POR";
594
595 /*
596 * Set keyboard controller mode. During this, the keyboard should be
597 * in the disabled state.
598 *
599 * Set up to try again if the keyboard asks for RESEND.
600 */
601 do {
602 kbd_write_output_w(KBD_CMD_DISABLE);
603 status = kbd_wait_for_input();
604 if (status == KBD_REPLY_ACK)
605 break;
606 if (status != KBD_REPLY_RESEND)
607 return "Kbd: disable keyboard: no ACK";
608 } while (1);
609
610 kbd_write_command_w(KBD_CCMD_WRITE_MODE);
611 kbd_write_output_w(KBD_MODE_KBD_INT
612 | KBD_MODE_SYS
613 | KBD_MODE_DISABLE_MOUSE
614 | KBD_MODE_KCC);
615
Wolfgang Denk0c8721a2005-09-23 11:05:55 +0200616 /* AMCC powerpc portables need this to use scan-code set 1 -- Cort */
wdenkaffae2b2002-08-17 09:36:01 +0000617 kbd_write_command_w(KBD_CCMD_READ_MODE);
618 if (!(kbd_wait_for_input() & KBD_MODE_KCC)) {
619 /*
620 * If the controller does not support conversion,
621 * Set the keyboard to scan-code set 1.
622 */
623 kbd_write_output_w(0xF0);
624 kbd_wait_for_input();
625 kbd_write_output_w(0x01);
626 kbd_wait_for_input();
627 }
628 kbd_write_output_w(KBD_CMD_ENABLE);
629 if (kbd_wait_for_input() != KBD_REPLY_ACK)
630 return "Kbd: enable keyboard: no ACK";
631
632 /*
633 * Finally, set the typematic rate to maximum.
634 */
635 kbd_write_output_w(KBD_CMD_SET_RATE);
636 if (kbd_wait_for_input() != KBD_REPLY_ACK)
637 return "Kbd: Set rate: no ACK";
638 kbd_write_output_w(0x00);
639 if (kbd_wait_for_input() != KBD_REPLY_ACK)
640 return "Kbd: Set rate: no ACK";
641 return NULL;
642}
643
644void kbd_interrupt(void)
645{
646 handle_kbd_event();
647}