/* $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; }