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/* $NetBSD: kbd.c,v 1.3 1994/10/27 04:21:15 cgd Exp $ */
/* netboot
*
* source in this file came from
* the original 386BSD boot blocks.
*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kbd.c 7.4 (Berkeley) 5/4/91
*/
#include "proto.h"
#define KBSTATP 0x64 /* kbd status port */
#define KBS_INP_BUF_FUL 0x02 /* kbd char ready */
#define KBDATAP 0x60 /* kbd data port */
#define K_RDWR 0x60 /* keyboard data & cmds (read/write) */
#define K_STATUS 0x64 /* keyboard status */
#define K_CMD 0x64 /* keybd ctlr command (write-only) */
#define K_OBUF_FUL 0x01 /* output buffer full */
#define K_IBUF_FUL 0x02 /* input buffer full */
#define KC_CMD_WIN 0xd0 /* read output port */
#define KC_CMD_WOUT 0xd1 /* write output port */
#define KB_A20 0x9f /* enable A20,
enable output buffer full interrupt
enable data line
disable clock line */
#define L 0x01 /* locking function */
#define SHF 0x02 /* keyboard shift */
#define ALT 0x04 /* alternate shift -- alternate chars */
#define NUM 0x08 /* numeric shift cursors vs. numeric */
#define CTL 0x10 /* control shift -- allows ctl function */
#define CPS 0x20 /* caps shift -- swaps case of letter */
#define ASCII 0x40 /* ascii code for this key */
#define STP 0x80 /* stop output */
static u_char action[128] = {
0, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 0- 7 */
ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 8-15 */
ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 16-23 */
ASCII, ASCII, ASCII, ASCII, ASCII, CTL, ASCII, ASCII, /* scan 24-31 */
ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 32-39 */
ASCII, ASCII, SHF , ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 40-47 */
ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, SHF, ASCII, /* scan 48-55 */
ALT, ASCII, CPS|L, 0, 0, ASCII, 0, 0, /* scan 56-63 */
0, 0, 0, 0, 0, NUM|L, STP|L, ASCII, /* scan 64-71 */
ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII, /* scan 72-79 */
ASCII, ASCII, ASCII, ASCII, 0, 0, 0, 0, /* scan 80-87 */
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
static u_char unshift[128] = { /* no shift */
0, 033 , '1' , '2' , '3' , '4' , '5' , '6' , /* scan 0- 7 */
'7' , '8' , '9' , '0' , '-' , '=' , 0177 ,'\t' , /* scan 8-15 */
'q' , 'w' , 'e' , 'r' , 't' , 'y' , 'u' , 'i' , /* scan 16-23 */
'o' , 'p' , '[' , ']' , '\r' , CTL , 'a' , 's' , /* scan 24-31 */
'd' , 'f' , 'g' , 'h' , 'j' , 'k' , 'l' , ';' , /* scan 32-39 */
'\'' , '`' , SHF , '\\' , 'z' , 'x' , 'c' , 'v' , /* scan 40-47 */
'b' , 'n' , 'm' , ',' , '.' , '/' , SHF , '*', /* scan 48-55 */
ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */
'2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
static u_char shift[128] = { /* shift shift */
0, 033 , '!' , '@' , '#' , '$' , '%' , '^' , /* scan 0- 7 */
'&' , '*' , '(' , ')' , '_' , '+' , 0177 ,'\t' , /* scan 8-15 */
'Q' , 'W' , 'E' , 'R' , 'T' , 'Y' , 'U' , 'I' , /* scan 16-23 */
'O' , 'P' , '[' , ']' , '\r' , CTL , 'A' , 'S' , /* scan 24-31 */
'D' , 'F' , 'G' , 'H' , 'J' , 'K' , 'L' , ':' , /* scan 32-39 */
'"' , '~' , SHF , '|' , 'Z' , 'X' , 'C' , 'V' , /* scan 40-47 */
'B' , 'N' , 'M' , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */
ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */
'2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
static u_char ctl[128] = { /* CTL shift */
0, 033 , '!' , 000 , '#' , '$' , '%' , 036 , /* scan 0- 7 */
'&' , '*' , '(' , ')' , 037 , '+' , 034 ,'\177', /* scan 8-15 */
021 , 027 , 005 , 022 , 024 , 031 , 025 , 011 , /* scan 16-23 */
017 , 020 , 033 , 035 , '\r' , CTL , 001 , 013 , /* scan 24-31 */
004 , 006 , 007 , 010 , 012 , 013 , 014 , ';' , /* scan 32-39 */
'\'' , '`' , SHF , 034 , 032 , 030 , 003 , 026 , /* scan 40-47 */
002 , 016 , 015 , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */
ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
CPS|L, 0, 0, 0, 0, 0, 0, 0, /* scan 64-71 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 72-79 */
0, 0, 0, 0, 0, 0, 0, 0, /* scan 80-87 */
0, 0, 033, '7' , '4' , '1' , 0, NUM|L, /* scan 88-95 */
'8' , '5' , '2' , 0, STP|L, '9' , '6' , '3' , /*scan 96-103*/
'.' , 0, '*' , '-' , '+' , 0, 0, 0, /*scan 104-111*/
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
static u_char shfts, ctls, alts, caps, num, stp;
static u_char chr;
static int is_chr_queued = 0;
static int
ProcessKbdEvent(void) {
/* Returns 1 if event result is an ascii char, 0 otherwise (or no event).
* As a side effect, it digests keyboard events and queues bona fide
* characters for subsequent reading.
*/
u_char dt, brk, act;
if ((inb(KBSTATP) & 0x01) == 0)
return is_chr_queued;
dt = inb(KBDATAP);
brk = dt & 0x80;
dt = dt & 0x7f;
act = action[dt];
if (act & SHF) {
if (brk)
shfts = 0;
else
shfts = 1;
}
if (act & ALT) {
if (brk)
alts = 0;
else
alts = 1;
}
if (act & NUM) {
if (act & L) {
if (!brk)
num ^= 1;
} else
if(brk)
num = 0;
else
num = 1;
}
if (act & CTL) {
if (brk)
ctls = 0;
else
ctls = 1;
}
if (act & CPS) {
if (act & L) {
if (!brk)
caps ^= 1;
} else
if (brk)
caps = 0;
else
caps = 1;
}
if (act & STP) {
if (act & L) {
if (!brk)
stp ^= 1;
} else
if (brk)
stp = 0;
else
stp = 1;
}
if (ctls && alts && dt == 83)
exit(1);
if ((act & ASCII) && !brk) {
if (shfts) {
chr = shift[dt];
} else {
if (ctls) {
chr = ctl[dt];
} else {
chr = unshift[dt];
}
}
if (caps && (chr >= 'a' && chr <= 'z')) {
chr -= 'a' - 'A' ;
}
is_chr_queued = 1;
}
return is_chr_queued;
}
int
IsKbdCharReady(void) {
#ifdef USE_BIOS
int result;
asm("
push %%ebx
call _prot_to_real
mov $1, %%ax
int $0x16
setz %%bl
.byte 0x66
call _real_to_prot
movsbl %%bl, %0
pop %%ebx
" : "=g" (result));
return result;
#else
return ProcessKbdEvent();
#endif
}
static int
scankbd(void) {
#ifdef notdef
u_char c;
c = inb(KBDATAP);
if (c == 83) exit();
/*if (c == 0xaa) return (0);
if (c == 0xfa) return (0);*/
if (bdt == 0) { bdt = c&0x7f; return(0); }
if(odt) return(1);
c &= 0x7f;
if (bdt == c) return(0);
odt = c;
#endif
return 1;
}
static void
kbdreset(void) {
u_char c;
/* Enable interrupts and keyboard controller */
while (inb(KBSTATP)&2); outb(KBSTATP,0x60);
while (inb(KBSTATP)&2); outb(KBDATAP,0x4D);
/* Start keyboard stuff RESET */
while (inb(KBSTATP)&2); /* wait input ready */
outb(KBDATAP,0xFF); /* RESET */
while((c=inb(KBDATAP))!=0xFA) ;
/* While we are here, defeat gatea20 */
while (inb(KBSTATP)&2); /* wait input ready */
outb(KBSTATP,0xd1);
while (inb(KBSTATP)&2); /* wait input ready */
outb(KBDATAP,0xdf);
while (inb(KBSTATP)&2); /* wait input ready */
inb(KBDATAP);
}
/* TBD - what does this do?, used by ResetCpu() */
void
KbdWait(int n) {
int v;
v = 0;
while(n-- && (v = scankbd()) == 0);
if (v) kbdreset();
}
/*
* Gate A20 for high memory
*/
u_char x_20 = KB_A20;
void
gateA20(void) {
while (inb(K_STATUS) & K_IBUF_FUL);
while (inb(K_STATUS) & K_OBUF_FUL)
(void)inb(K_RDWR);
outb(K_CMD, KC_CMD_WOUT);
while (inb(K_STATUS) & K_IBUF_FUL);
outb(K_RDWR, x_20);
while (inb(K_STATUS) & K_IBUF_FUL);
}
int
getc(void) {
#ifdef USE_BIOS
int rslt;
asm("
push %%ebx
call _prot_to_real
movb $0x0, %%ah
sti
int $0x16
cli
movb %%al, %%bl
.byte 0x66
call _real_to_prot
xor %%eax, %%eax
movb %%bl, %0
pop %%ebx
" : "=g" (rslt));
return rslt;
#else
while (!is_chr_queued) {
ProcessKbdEvent();
}
is_chr_queued = 0;
return chr;
#endif
}
int
getchar(void) {
int c;
if ((c=getc()) == '\r')
c = '\n';
if (c == '\b') {
putchar('\b');
putchar(' ');
}
putchar(c);
return c;
}
|
