4.4BSD/usr/src/sys/i386/stand/kbd.c
/*-
* Copyright (c) 1990, 1993
* 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 8.1 (Berkeley) 6/11/93
*/
#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 */
typedef unsigned char u_char;
u_char inb();
u_char action[] = {
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, } ;
u_char unshift[] = { /* 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, } ;
u_char shift[] = { /* shift shift */
0, 033 , '!' , '@' , '#' , '$' , '%' , '^' , /* scan 0- 7 */
'&' , '*' , '(' , ')' , '_' , '+' , 0177 ,'\t' , /* scan 8-15 */
'Q' , 'W' , 'E' , 'R' , 'T' , 'Y' , 'U' , 'I' , /* scan 16-23 */
'O' , 'P' , '[' , ']' , '\r' , CTL , 'A' , 'S' , /* scan 24-31 */
'D' , 'F' , 'G' , 'H' , 'J' , 'K' , 'L' , ':' , /* scan 32-39 */
'"' , '~' , SHF , '|' , 'Z' , 'X' , 'C' , 'V' , /* scan 40-47 */
'B' , 'N' , 'M' , '<' , '>' , '?' , SHF , '*', /* scan 48-55 */
ALT , ' ' , CPS|L, 0, 0, ' ' , 0, 0, /* scan 56-63 */
0, 0, 0, 0, 0, NUM|L, STP|L, '7', /* scan 64-71 */
'8', '9', '-', '4', '5', '6', '+', '1', /* scan 72-79 */
'2', '3', '0', '.', 0, 0, 0, 0, /* scan 80-87 */
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, } ;
u_char ctl[] = { /* CTL shift */
0, 033 , '!' , 000 , '#' , '$' , '%' , 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, } ;
#ifdef notdef
struct key {
u_short action; /* how this key functions */
char ascii[8]; /* ascii result character indexed by shifts */
};
#endif
u_char shfts, ctls, alts, caps, num, stp;
#define KBSTATP 0x64 /* kbd status port */
#define KBS_INP_BUF_FUL 0x02 /* kbd char ready */
#define KBDATAP 0x60 /* kbd data port */
#define KBSTATUSPORT 0x61 /* kbd status */
u_char odt;
u_char kbd() {
u_char dt, brk, act;
loop:
while(inb(0x64)&1 == 0);
dt = inb(0x60);
do {
while(inb(0x64)&1 == 0);
} while(dt == inb(0x60));
odt = dt;
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(ctl && alts && dt == 83) exit();
if ((act&ASCII) && !brk) {
u_char chr;
if (shfts){
chr = shift[dt] ; } else {
if (ctls) {
chr = ctl[dt] ; } else {
chr = unshift[dt] ; } }
if (caps && (chr >= 'a' && chr <= 'z')) {
chr -= 'a' - 'A' ;
}
/*do
while(inb(0x64)&1 == 0) ;
while (inb(0x60) == (chr | 0x80));
while(inb(0x64)&1 == 1) inb(0x60);A*/
return(chr);
}
goto loop;
}
scankbd() {
u_char c;
c = inb(0x60);
if (c == 0xaa) { odt = 0x2a; return (0); }
if (c == 0xfa) { odt = 0x7a; return (0); }
c &= 0x7f;
if ( (odt&0x7f) == c )return(0);
if(odt == 0) { odt = c; return(0); }
return(kbd());
}
kbdreset()
{
u_char c;
/* Enable interrupts and keyboard controller */
while (inb(0x64)&2); outb(0x64,0x60);
while (inb(0x64)&2); outb(0x60,0x4D);
/* Start keyboard stuff RESET */
while (inb(0x64)&2); /* wait input ready */
outb(0x60,0xFF); /* RESET */
while((c=inb(0x60))!=0xFA) ;
/* While we are here, defeat gatea20 */
while (inb(0x64)&2); /* wait input ready */
outb(0x64,0xd1);
while (inb(0x64)&2); /* wait input ready */
outb(0x60,0xdf);
}
u_char getchar() {
u_char c;
c = kbd();
if (c == '\b' || c == '\177') return(c);
if (c == '\r') c = '\n';
putchar(c);
return(c);
}
reset_cpu() {
while (inb(0x64)&2); /* wait input ready */
outb(0x64,0xFE); /* Reset Command */
wait(4000000);
/* NOTREACHED */
}