143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* $NetBSD: console.c,v 1.4 1998/08/22 10:55:37 scw Exp $ */
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/*
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*
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* Copyright (c) 1995 Charles D. Cranor and Seth Widoff
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor
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* and Seth Widoff.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* console i/o
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*/
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#include "sboot.h"
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/*
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* hardware
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*/
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struct zs_hw {
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volatile u_char ctl;
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volatile u_char data;
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};
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struct zs_hw *zs = (struct zs_hw *)CONS_ZS_ADDR;
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/*
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* consinit: init console
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*/
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consinit()
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{
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int mark = time();
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int rr1;
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while (1) {
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if (time() > mark + 5) break;
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zs->ctl = 1; rr1 = zs->ctl;
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zs->ctl = 0;
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if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4) break; /* zs_drain! */
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}
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zs->ctl = 9; zs->ctl = 0x00; /* clear interrupt */
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zs->ctl = 4; zs->ctl = 0x44; /* 16x clk, 1 stop bit */
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zs->ctl = 5; zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */
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zs->ctl = 3; zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */
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zs->ctl = 1; zs->ctl = 0x00; /* no intrs */
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zs->ctl = 2; zs->ctl = 0x00; /* no vector */
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zs->ctl = 10; zs->ctl = 0x00; /* */
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zs->ctl = 11; zs->ctl = 0x50; /* clocking options */
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zs->ctl = 12; zs->ctl = 0x0e; /* 9600 baud, part 1 */
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zs->ctl = 13; zs->ctl = 0x00; /* 9600 baud, part 2 */
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zs->ctl = 14; zs->ctl = 0x03; /* more clocking options */
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zs->ctl = 15; zs->ctl = 0x00; /* clear intrs */
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}
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/*
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* putchar: put char to console
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*/
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void putchar(char c)
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{
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if (c == '\n') putchar('\r'); /* avoid the need for \r\n in printf */
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zs->ctl = 0;
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while ((zs->ctl & 0x04) == 0) {
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zs->ctl = 0;
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}
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zs->ctl = 8;
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zs->ctl = c;
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}
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/*
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* cngetc: get 1 char from console
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*/
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char cngetc ()
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{
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zs->ctl = 0;
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while ((zs->ctl & 0x1) == 0) {
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zs->ctl = 0;
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}
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zs->ctl = 8;
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return zs->ctl;
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}
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/*
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* puts: put string to console
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*/
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void puts ( char * str )
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{
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while ( *str != '\0' ) {
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putchar(*str);
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str++;
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}
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}
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/*
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* ngets: get string from console
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*/
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char *ngets ( char * str, int size )
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{
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int i = 0;
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while ( (i < size - 1) && (str[i] = cngetc()) != '\r') {
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if ( str[i] == '\b' || str[i] == 0x7F ) {
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if ( i == 0) continue;
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i--;
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puts("\b \b");
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continue;
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}
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putchar(str[i]);
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i++;
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}
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puts("\n");
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str[i] = '\0';
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return(&str[i]);
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}
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