1 /* $NetBSD: console.c,v 1.5 2000/07/24 18:40:01 jdolecek Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1995 Charles D. Cranor and Seth Widoff 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor 19 * and Seth Widoff. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 /* 35 * console i/o 36 */ 37 38 #include "sboot.h" 39 40 /* 41 * hardware 42 */ 43 44 struct zs_hw { 45 volatile u_char ctl; 46 volatile u_char data; 47 }; 48 49 struct zs_hw *zs = (struct zs_hw *)CONS_ZS_ADDR; 50 51 /* 52 * consinit: init console 53 */ 54 55 void 56 consinit() 57 58 { 59 int mark = time(); 60 int rr1; 61 while (1) { 62 if (time() > mark + 5) break; 63 zs->ctl = 1; rr1 = zs->ctl; 64 zs->ctl = 0; 65 if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4) break; /* zs_drain! */ 66 } 67 zs->ctl = 9; zs->ctl = 0x00; /* clear interrupt */ 68 zs->ctl = 4; zs->ctl = 0x44; /* 16x clk, 1 stop bit */ 69 zs->ctl = 5; zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */ 70 zs->ctl = 3; zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */ 71 zs->ctl = 1; zs->ctl = 0x00; /* no intrs */ 72 zs->ctl = 2; zs->ctl = 0x00; /* no vector */ 73 zs->ctl = 10; zs->ctl = 0x00; /* */ 74 zs->ctl = 11; zs->ctl = 0x50; /* clocking options */ 75 zs->ctl = 12; zs->ctl = 0x0e; /* 9600 baud, part 1 */ 76 zs->ctl = 13; zs->ctl = 0x00; /* 9600 baud, part 2 */ 77 zs->ctl = 14; zs->ctl = 0x03; /* more clocking options */ 78 zs->ctl = 15; zs->ctl = 0x00; /* clear intrs */ 79 } 80 81 /* 82 * putchar: put char to console 83 */ 84 85 void putchar(int c) 86 { 87 if (c == '\n') putchar('\r'); /* avoid the need for \r\n in printf */ 88 zs->ctl = 0; 89 while ((zs->ctl & 0x04) == 0) { 90 zs->ctl = 0; 91 } 92 zs->ctl = 8; 93 zs->ctl = (char) c; 94 } 95 96 /* 97 * cngetc: get 1 char from console 98 */ 99 100 char cngetc () 101 { 102 zs->ctl = 0; 103 while ((zs->ctl & 0x1) == 0) { 104 zs->ctl = 0; 105 } 106 zs->ctl = 8; 107 return zs->ctl; 108 } 109 110 /* 111 * puts: put string to console 112 */ 113 114 void puts ( char * str ) 115 { 116 while ( *str != '\0' ) { 117 putchar(*str); 118 str++; 119 } 120 } 121 122 /* 123 * ngets: get string from console 124 */ 125 126 char *ngets ( char * str, int size ) 127 { 128 int i = 0; 129 while ( (i < size - 1) && (str[i] = cngetc()) != '\r') { 130 if ( str[i] == '\b' || str[i] == 0x7F ) { 131 if ( i == 0) continue; 132 i--; 133 puts("\b \b"); 134 continue; 135 } 136 putchar(str[i]); 137 i++; 138 } 139 puts("\n"); 140 str[i] = '\0'; 141 return(&str[i]); 142 } 143 144