1 /* $NetBSD: pcio.c,v 1.4 1997/06/13 13:41:20 drochner Exp $ */ 2 3 /* 4 * Copyright (c) 1996 5 * Matthias Drochner. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 /* 36 * console I/O 37 * needs lowlevel routines from conio.S and comio.S 38 */ 39 40 #include <lib/libsa/stand.h> 41 42 #include "libi386.h" 43 44 extern void conputc __P((int)); 45 extern int congetc __P((void)); 46 extern int coniskey __P((void)); 47 48 #ifdef SUPPORT_SERIAL 49 extern void cominit __P((int)); 50 extern int computc __P((int, int)); 51 extern int comgetc __P((int)); 52 extern int comstatus __P((int)); 53 54 static int iodev; 55 #endif 56 57 static char *iodevname[] = { 58 "pc", 59 #ifdef SUPPORT_SERIAL 60 "com0", 61 "com1" 62 #endif 63 }; 64 65 char * 66 initio(dev) 67 int dev; 68 { 69 #ifdef SUPPORT_SERIAL 70 switch (dev) { 71 case CONSDEV_AUTO: 72 /* 73 * serial console must have hardware handshake! check: 1. 74 * character output without error 2. status bits for modem 75 * ready set (status seems only useful after character 76 * output) 77 */ 78 cominit(0); 79 if (!(computc(' ', 0) & 0x80) && (comstatus(0) & 0x00b0)) 80 dev = CONSDEV_COM0; 81 else { 82 cominit(1); 83 if (!(computc(' ', 1) & 0x80) && (comstatus(1) & 0x00b0)) 84 dev = CONSDEV_COM1; 85 else 86 dev = CONSDEV_PC; 87 } 88 break; 89 case CONSDEV_COM0: 90 cominit(0); 91 break; 92 case CONSDEV_COM1: 93 cominit(1); 94 break; 95 default: 96 dev = CONSDEV_PC; 97 break; 98 } 99 return (iodevname[iodev = dev]); 100 #else 101 return (iodevname[0]); 102 #endif 103 } 104 105 static inline void 106 internal_putchar(c) 107 int c; 108 { 109 #ifdef SUPPORT_SERIAL 110 switch (iodev) { 111 case CONSDEV_PC: 112 #endif 113 conputc(c); 114 #ifdef SUPPORT_SERIAL 115 break; 116 case CONSDEV_COM0: 117 computc(c, 0); 118 break; 119 case CONSDEV_COM1: 120 computc(c, 1); 121 break; 122 } 123 #endif 124 } 125 126 void 127 putchar(c) 128 int c; 129 { 130 if (c == '\n') 131 internal_putchar('\r'); 132 internal_putchar(c); 133 } 134 135 int 136 getchar() 137 { 138 #ifdef SUPPORT_SERIAL 139 switch (iodev) { 140 default: /* to make gcc -Wall happy... */ 141 case CONSDEV_PC: 142 #endif 143 return (congetc()); 144 #ifdef SUPPORT_SERIAL 145 case CONSDEV_COM0: 146 return (comgetc(0)); 147 case CONSDEV_COM1: 148 return (comgetc(1)); 149 } 150 #endif 151 } 152 153 int 154 iskey() 155 { 156 #ifdef SUPPORT_SERIAL 157 switch (iodev) { 158 default: /* to make gcc -Wall happy... */ 159 case CONSDEV_PC: 160 #endif 161 return (coniskey()); 162 #ifdef SUPPORT_SERIAL 163 case CONSDEV_COM0: 164 return (!!(comstatus(0) & 0x0100)); 165 case CONSDEV_COM1: 166 return (!!(comstatus(1) & 0x0100)); 167 } 168 #endif 169 } 170