1 /* $NetBSD: console.c,v 1.6 2008/01/12 09:54:33 tsutsui 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(void) 57 { 58 int mark = time(); 59 int rr1; 60 for (;;) { 61 if (time() > mark + 5) break; 62 zs->ctl = 1; rr1 = zs->ctl; 63 zs->ctl = 0; 64 if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4) 65 break; /* zs_drain! */ 66 } 67 zs->ctl = 9; 68 zs->ctl = 0x00; /* clear interrupt */ 69 zs->ctl = 4; 70 zs->ctl = 0x44; /* 16x clk, 1 stop bit */ 71 zs->ctl = 5; 72 zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */ 73 zs->ctl = 3; 74 zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */ 75 zs->ctl = 1; 76 zs->ctl = 0x00; /* no intrs */ 77 zs->ctl = 2; 78 zs->ctl = 0x00; /* no vector */ 79 zs->ctl = 10; 80 zs->ctl = 0x00; /* */ 81 zs->ctl = 11; 82 zs->ctl = 0x50; /* clocking options */ 83 zs->ctl = 12; 84 zs->ctl = 0x0e; /* 9600 baud, part 1 */ 85 zs->ctl = 13; 86 zs->ctl = 0x00; /* 9600 baud, part 2 */ 87 zs->ctl = 14; 88 zs->ctl = 0x03; /* more clocking options */ 89 zs->ctl = 15; 90 zs->ctl = 0x00; /* clear intrs */ 91 } 92 93 /* 94 * putchar: put char to console 95 */ 96 97 void putchar(int c) 98 { 99 if (c == '\n') 100 putchar('\r'); /* avoid the need for \r\n in printf */ 101 zs->ctl = 0; 102 while ((zs->ctl & 0x04) == 0) { 103 zs->ctl = 0; 104 } 105 zs->ctl = 8; 106 zs->ctl = (char)c; 107 } 108 109 /* 110 * cngetc: get 1 char from console 111 */ 112 113 char cngetc(void) 114 { 115 116 zs->ctl = 0; 117 while ((zs->ctl & 0x1) == 0) { 118 zs->ctl = 0; 119 } 120 zs->ctl = 8; 121 return zs->ctl; 122 } 123 124 /* 125 * puts: put string to console 126 */ 127 128 void 129 puts(char *str) 130 { 131 132 while (*str != '\0') { 133 putchar(*str); 134 str++; 135 } 136 } 137 138 /* 139 * ngets: get string from console 140 */ 141 142 char * 143 ngets(char *str, int size) 144 { 145 146 int i = 0; 147 while ((i < size - 1) && (str[i] = cngetc()) != '\r') { 148 if (str[i] == '\b' || str[i] == 0x7F) { 149 if (i == 0) 150 continue; 151 i--; 152 puts("\b \b"); 153 continue; 154 } 155 putchar(str[i]); 156 i++; 157 } 158 puts("\n"); 159 str[i] = '\0'; 160 return &str[i]; 161 } 162