NetBSD/sys/arch/mvme68k/stand/sboot/console.c

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/* $NetBSD: console.c,v 1.4 1998/08/22 10:55:37 scw Exp $ */
1998-01-05 10:02:46 +03:00
/*
*
* Copyright (c) 1995 Charles D. Cranor and Seth Widoff
* All rights reserved.
*
* 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 Charles D. Cranor
* and Seth Widoff.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* console i/o
*/
#include "sboot.h"
/*
* hardware
*/
struct zs_hw {
volatile u_char ctl;
volatile u_char data;
};
struct zs_hw *zs = (struct zs_hw *)CONS_ZS_ADDR;
/*
* consinit: init console
*/
consinit()
{
int mark = time();
int rr1;
while (1) {
if (time() > mark + 5) break;
zs->ctl = 1; rr1 = zs->ctl;
zs->ctl = 0;
if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4) break; /* zs_drain! */
}
zs->ctl = 9; zs->ctl = 0x00; /* clear interrupt */
zs->ctl = 4; zs->ctl = 0x44; /* 16x clk, 1 stop bit */
zs->ctl = 5; zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */
zs->ctl = 3; zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */
zs->ctl = 1; zs->ctl = 0x00; /* no intrs */
zs->ctl = 2; zs->ctl = 0x00; /* no vector */
zs->ctl = 10; zs->ctl = 0x00; /* */
zs->ctl = 11; zs->ctl = 0x50; /* clocking options */
zs->ctl = 12; zs->ctl = 0x0e; /* 9600 baud, part 1 */
zs->ctl = 13; zs->ctl = 0x00; /* 9600 baud, part 2 */
zs->ctl = 14; zs->ctl = 0x03; /* more clocking options */
zs->ctl = 15; zs->ctl = 0x00; /* clear intrs */
}
/*
* putchar: put char to console
*/
void putchar(char c)
{
if (c == '\n') putchar('\r'); /* avoid the need for \r\n in printf */
zs->ctl = 0;
while ((zs->ctl & 0x04) == 0) {
zs->ctl = 0;
}
zs->ctl = 8;
zs->ctl = c;
}
/*
* cngetc: get 1 char from console
*/
char cngetc ()
{
zs->ctl = 0;
while ((zs->ctl & 0x1) == 0) {
zs->ctl = 0;
}
zs->ctl = 8;
return zs->ctl;
}
/*
* puts: put string to console
*/
void puts ( char * str )
{
while ( *str != '\0' ) {
putchar(*str);
str++;
}
}
/*
* ngets: get string from console
*/
char *ngets ( char * str, int size )
{
int i = 0;
while ( (i < size - 1) && (str[i] = cngetc()) != '\r') {
if ( str[i] == '\b' || str[i] == 0x7F ) {
if ( i == 0) continue;
i--;
puts("\b \b");
continue;
}
putchar(str[i]);
i++;
}
puts("\n");
str[i] = '\0';
return(&str[i]);
}