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console.c revision 1.6
      1  1.6   tsutsui /*	$NetBSD: console.c,v 1.6 2008/01/12 09:54:33 tsutsui Exp $	*/
      2  1.3     perry 
      3  1.1     chuck /*
      4  1.1     chuck  *
      5  1.1     chuck  * Copyright (c) 1995 Charles D. Cranor and Seth Widoff
      6  1.1     chuck  * All rights reserved.
      7  1.1     chuck  *
      8  1.1     chuck  * Redistribution and use in source and binary forms, with or without
      9  1.1     chuck  * modification, are permitted provided that the following conditions
     10  1.1     chuck  * are met:
     11  1.1     chuck  * 1. Redistributions of source code must retain the above copyright
     12  1.1     chuck  *    notice, this list of conditions and the following disclaimer.
     13  1.1     chuck  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.1     chuck  *    notice, this list of conditions and the following disclaimer in the
     15  1.1     chuck  *    documentation and/or other materials provided with the distribution.
     16  1.1     chuck  * 3. All advertising materials mentioning features or use of this software
     17  1.1     chuck  *    must display the following acknowledgement:
     18  1.1     chuck  *      This product includes software developed by Charles D. Cranor
     19  1.1     chuck  *	and Seth Widoff.
     20  1.1     chuck  * 4. The name of the author may not be used to endorse or promote products
     21  1.1     chuck  *    derived from this software without specific prior written permission.
     22  1.1     chuck  *
     23  1.1     chuck  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  1.1     chuck  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  1.1     chuck  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  1.1     chuck  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  1.1     chuck  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  1.1     chuck  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  1.1     chuck  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  1.1     chuck  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  1.1     chuck  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  1.1     chuck  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  1.1     chuck  */
     34  1.1     chuck /*
     35  1.1     chuck  * console i/o
     36  1.1     chuck  */
     37  1.1     chuck 
     38  1.1     chuck #include "sboot.h"
     39  1.1     chuck 
     40  1.1     chuck /*
     41  1.1     chuck  * hardware
     42  1.1     chuck  */
     43  1.1     chuck 
     44  1.1     chuck struct zs_hw {
     45  1.6   tsutsui 	volatile u_char ctl;
     46  1.6   tsutsui 	volatile u_char data;
     47  1.1     chuck };
     48  1.1     chuck 
     49  1.1     chuck struct zs_hw *zs =  (struct zs_hw *)CONS_ZS_ADDR;
     50  1.1     chuck 
     51  1.1     chuck /*
     52  1.1     chuck  * consinit: init console
     53  1.1     chuck  */
     54  1.1     chuck 
     55  1.5  jdolecek void
     56  1.6   tsutsui consinit(void)
     57  1.1     chuck {
     58  1.6   tsutsui 	int mark = time();
     59  1.6   tsutsui 	int rr1;
     60  1.6   tsutsui 	for (;;) {
     61  1.6   tsutsui 		if (time() > mark + 5) break;
     62  1.6   tsutsui 		zs->ctl = 1; rr1 = zs->ctl;
     63  1.6   tsutsui 		zs->ctl = 0;
     64  1.6   tsutsui 		if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4)
     65  1.6   tsutsui 			break; /* zs_drain! */
     66  1.6   tsutsui 	}
     67  1.6   tsutsui 	zs->ctl =  9;
     68  1.6   tsutsui 	zs->ctl = 0x00; /* clear interrupt */
     69  1.6   tsutsui 	zs->ctl =  4;
     70  1.6   tsutsui 	zs->ctl = 0x44; /* 16x clk, 1 stop bit */
     71  1.6   tsutsui 	zs->ctl =  5;
     72  1.6   tsutsui 	zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */
     73  1.6   tsutsui 	zs->ctl =  3;
     74  1.6   tsutsui 	zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */
     75  1.6   tsutsui 	zs->ctl =  1;
     76  1.6   tsutsui 	zs->ctl = 0x00; /* no intrs */
     77  1.6   tsutsui 	zs->ctl =  2;
     78  1.6   tsutsui 	zs->ctl = 0x00; /* no vector */
     79  1.6   tsutsui 	zs->ctl = 10;
     80  1.6   tsutsui 	zs->ctl = 0x00; /* */
     81  1.6   tsutsui 	zs->ctl = 11;
     82  1.6   tsutsui 	zs->ctl = 0x50; /* clocking options */
     83  1.6   tsutsui 	zs->ctl = 12;
     84  1.6   tsutsui 	zs->ctl = 0x0e; /* 9600 baud, part 1 */
     85  1.6   tsutsui 	zs->ctl = 13;
     86  1.6   tsutsui 	zs->ctl = 0x00; /* 9600 baud, part 2 */
     87  1.6   tsutsui 	zs->ctl = 14;
     88  1.6   tsutsui 	zs->ctl = 0x03; /* more clocking options */
     89  1.6   tsutsui 	zs->ctl = 15;
     90  1.6   tsutsui 	zs->ctl = 0x00; /* clear intrs */
     91  1.1     chuck }
     92  1.1     chuck 
     93  1.1     chuck /*
     94  1.1     chuck  * putchar: put char to console
     95  1.1     chuck  */
     96  1.1     chuck 
     97  1.5  jdolecek void putchar(int c)
     98  1.1     chuck {
     99  1.6   tsutsui 	if (c == '\n')
    100  1.6   tsutsui 		putchar('\r');	/* avoid the need for \r\n in printf */
    101  1.6   tsutsui 	zs->ctl = 0;
    102  1.6   tsutsui 	while ((zs->ctl & 0x04) == 0) {
    103  1.6   tsutsui 		zs->ctl = 0;
    104  1.6   tsutsui 	}
    105  1.6   tsutsui 	zs->ctl = 8;
    106  1.6   tsutsui 	zs->ctl = (char)c;
    107  1.1     chuck }
    108  1.1     chuck 
    109  1.1     chuck /*
    110  1.1     chuck  * cngetc: get 1 char from console
    111  1.1     chuck  */
    112  1.1     chuck 
    113  1.6   tsutsui char cngetc(void)
    114  1.1     chuck {
    115  1.6   tsutsui 
    116  1.6   tsutsui 	zs->ctl = 0;
    117  1.6   tsutsui 	while ((zs->ctl & 0x1) == 0) {
    118  1.6   tsutsui 		zs->ctl = 0;
    119  1.6   tsutsui 	}
    120  1.6   tsutsui 	zs->ctl = 8;
    121  1.6   tsutsui 	return zs->ctl;
    122  1.1     chuck }
    123  1.1     chuck 
    124  1.1     chuck /*
    125  1.1     chuck  * puts: put string to console
    126  1.1     chuck  */
    127  1.1     chuck 
    128  1.6   tsutsui void
    129  1.6   tsutsui puts(char *str)
    130  1.1     chuck {
    131  1.6   tsutsui 
    132  1.6   tsutsui 	while (*str != '\0') {
    133  1.6   tsutsui 		putchar(*str);
    134  1.6   tsutsui 		str++;
    135  1.6   tsutsui 	}
    136  1.1     chuck }
    137  1.1     chuck 
    138  1.1     chuck /*
    139  1.1     chuck  * ngets: get string from console
    140  1.1     chuck  */
    141  1.1     chuck 
    142  1.6   tsutsui char *
    143  1.6   tsutsui ngets(char *str, int size)
    144  1.1     chuck {
    145  1.6   tsutsui 
    146  1.6   tsutsui 	int i = 0;
    147  1.6   tsutsui 	while ((i < size - 1) && (str[i] = cngetc()) != '\r') {
    148  1.6   tsutsui 		if (str[i] == '\b' || str[i] == 0x7F) {
    149  1.6   tsutsui 			if (i == 0)
    150  1.6   tsutsui 				continue;
    151  1.6   tsutsui 			i--;
    152  1.6   tsutsui 			puts("\b \b");
    153  1.6   tsutsui 			continue;
    154  1.6   tsutsui 		}
    155  1.6   tsutsui 		putchar(str[i]);
    156  1.6   tsutsui 		i++;
    157  1.6   tsutsui 	}
    158  1.6   tsutsui 	puts("\n");
    159  1.6   tsutsui 	str[i] = '\0';
    160  1.6   tsutsui 	return &str[i];
    161  1.1     chuck }
    162