1 /* $NetBSD: console.c,v 1.7 2011/02/02 17:53:41 chuck Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Charles D. Cranor and Seth Widoff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 /* 28 * console i/o 29 */ 30 31 #include "sboot.h" 32 33 /* 34 * hardware 35 */ 36 37 struct zs_hw { 38 volatile u_char ctl; 39 volatile u_char data; 40 }; 41 42 struct zs_hw *zs = (struct zs_hw *)CONS_ZS_ADDR; 43 44 /* 45 * consinit: init console 46 */ 47 48 void 49 consinit(void) 50 { 51 int mark = time(); 52 int rr1; 53 for (;;) { 54 if (time() > mark + 5) break; 55 zs->ctl = 1; rr1 = zs->ctl; 56 zs->ctl = 0; 57 if ((rr1 & 0x1) == 1 && (zs->ctl & 0x4) == 4) 58 break; /* zs_drain! */ 59 } 60 zs->ctl = 9; 61 zs->ctl = 0x00; /* clear interrupt */ 62 zs->ctl = 4; 63 zs->ctl = 0x44; /* 16x clk, 1 stop bit */ 64 zs->ctl = 5; 65 zs->ctl = 0xea; /* DTR on, 8 bit xmit, xmit on, RTS on */ 66 zs->ctl = 3; 67 zs->ctl = 0xc1; /* 8 bit recv, auto cd_cts, recv on */ 68 zs->ctl = 1; 69 zs->ctl = 0x00; /* no intrs */ 70 zs->ctl = 2; 71 zs->ctl = 0x00; /* no vector */ 72 zs->ctl = 10; 73 zs->ctl = 0x00; /* */ 74 zs->ctl = 11; 75 zs->ctl = 0x50; /* clocking options */ 76 zs->ctl = 12; 77 zs->ctl = 0x0e; /* 9600 baud, part 1 */ 78 zs->ctl = 13; 79 zs->ctl = 0x00; /* 9600 baud, part 2 */ 80 zs->ctl = 14; 81 zs->ctl = 0x03; /* more clocking options */ 82 zs->ctl = 15; 83 zs->ctl = 0x00; /* clear intrs */ 84 } 85 86 /* 87 * putchar: put char to console 88 */ 89 90 void putchar(int c) 91 { 92 if (c == '\n') 93 putchar('\r'); /* avoid the need for \r\n in printf */ 94 zs->ctl = 0; 95 while ((zs->ctl & 0x04) == 0) { 96 zs->ctl = 0; 97 } 98 zs->ctl = 8; 99 zs->ctl = (char)c; 100 } 101 102 /* 103 * cngetc: get 1 char from console 104 */ 105 106 char cngetc(void) 107 { 108 109 zs->ctl = 0; 110 while ((zs->ctl & 0x1) == 0) { 111 zs->ctl = 0; 112 } 113 zs->ctl = 8; 114 return zs->ctl; 115 } 116 117 /* 118 * puts: put string to console 119 */ 120 121 void 122 puts(char *str) 123 { 124 125 while (*str != '\0') { 126 putchar(*str); 127 str++; 128 } 129 } 130 131 /* 132 * ngets: get string from console 133 */ 134 135 char * 136 ngets(char *str, int size) 137 { 138 139 int i = 0; 140 while ((i < size - 1) && (str[i] = cngetc()) != '\r') { 141 if (str[i] == '\b' || str[i] == 0x7F) { 142 if (i == 0) 143 continue; 144 i--; 145 puts("\b \b"); 146 continue; 147 } 148 putchar(str[i]); 149 i++; 150 } 151 puts("\n"); 152 str[i] = '\0'; 153 return &str[i]; 154 } 155