pcio.c revision 1.7
1 /* $NetBSD: pcio.c,v 1.7 1998/08/13 17:41:11 rvb Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1997 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 #include <lib/libkern/libkern.h> 42 43 #include "libi386.h" 44 #include "bootinfo.h" 45 46 extern void conputc __P((int)); 47 extern int congetc __P((void)); 48 extern int coniskey __P((void)); 49 50 struct btinfo_console btinfo_console; 51 52 #ifdef SUPPORT_SERIAL 53 static int iodev; 54 55 #ifdef DIRECT_SERIAL 56 #include "comio_direct.h" 57 58 #define cominit cominit_d 59 #define computc computc_d 60 #define comgetc comgetc_d 61 /* comstatus() is different */ 62 63 #define SERIAL_ARG btinfo_console.addr 64 #else 65 extern void cominit __P((int)); 66 extern int computc __P((int, int)); 67 extern int comgetc __P((int)); 68 extern int comstatus __P((int)); 69 70 #define SERIAL_ARG (iodev - CONSDEV_COM0) 71 #endif /* DIRECT_SERIAL */ 72 73 static int getcomaddr __P((int)); 74 #endif /* SUPPORT_SERIAL */ 75 76 #define POLL_FREQ 10 77 78 #ifdef SUPPORT_SERIAL 79 static int 80 getcomaddr(idx) 81 int idx; 82 { 83 short addr; 84 /* read in BIOS data area */ 85 pvbcopy(0x400 + 2 * idx, &addr, 2); 86 return(addr); 87 } 88 #endif 89 90 void 91 initio(dev) 92 int dev; 93 { 94 #ifdef SUPPORT_SERIAL 95 int i; 96 97 switch (dev) { 98 case CONSDEV_AUTO: 99 for(i = 0; i < 3; i++) { 100 iodev = CONSDEV_COM0 + i; 101 btinfo_console.addr = getcomaddr(i); 102 if(!btinfo_console.addr) break; 103 conputc('0' + i); /* to tell user what happens */ 104 cominit(SERIAL_ARG); 105 #ifdef DIRECT_SERIAL 106 /* check for: 107 * 1. successful output 108 * 2. optionally, keypress within 1s 109 */ 110 if ( computc(':', SERIAL_ARG) && 111 computc('-', SERIAL_ARG) && 112 computc('(', SERIAL_ARG) 113 #ifdef COMCONS_KEYPRESS 114 && awaitkey(7, 0) 115 #endif 116 ) 117 goto ok; 118 #else 119 /* 120 * serial console must have hardware handshake! 121 * check: 122 * 1. character output without error 123 * 2. status bits for modem ready set 124 * (status seems only useful after character output) 125 * 3. optionally, keypress within 1s 126 */ 127 if (!(computc('@', SERIAL_ARG) & 0x80) 128 && (comstatus(SERIAL_ARG) & 0x00b0) 129 #ifdef COMCONS_KEYPRESS 130 && awaitkey(7, 0) 131 #endif 132 ) 133 goto ok; 134 #endif 135 } 136 iodev = CONSDEV_PC; 137 ok: 138 break; 139 case CONSDEV_COM0: 140 case CONSDEV_COM1: 141 case CONSDEV_COM2: 142 case CONSDEV_COM3: 143 iodev = dev; 144 btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0); 145 if(!btinfo_console.addr) goto nocom; 146 cominit(SERIAL_ARG); 147 break; 148 case CONSDEV_COM0KBD: 149 case CONSDEV_COM1KBD: 150 case CONSDEV_COM2KBD: 151 case CONSDEV_COM3KBD: 152 iodev = dev - 4; 153 i = iodev - CONSDEV_COM0; 154 btinfo_console.addr = getcomaddr(i); 155 if(!btinfo_console.addr) goto nocom; 156 conputc('0' + i); /* to tell user what happens */ 157 cominit(SERIAL_ARG); 158 #ifdef DIRECT_SERIAL 159 /* check for: 160 * 1. successful output 161 * 2. optionally, keypress within 1s 162 */ 163 if ( computc(':', SERIAL_ARG) && 164 computc('-', SERIAL_ARG) && 165 computc('(', SERIAL_ARG) 166 #ifdef COMCONS_KEYPRESS 167 && awaitkey(7, 0) 168 #endif 169 ) 170 break; 171 #else 172 /* 173 * serial console must have hardware handshake! 174 * check: 175 * 1. character output without error 176 * 2. status bits for modem ready set 177 * (status seems only useful after character output) 178 * 3. optionally, keypress within 1s 179 */ 180 if (!(computc('@', SERIAL_ARG) & 0x80) 181 && (comstatus(SERIAL_ARG) & 0x00b0) 182 #ifdef COMCONS_KEYPRESS 183 && awaitkey(7, 0) 184 #endif 185 ) 186 break; 187 #endif 188 default: 189 nocom: 190 iodev = CONSDEV_PC; 191 break; 192 } 193 conputc('\015'); 194 conputc('\n'); 195 strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16); 196 #if defined(DIRECT_SERIAL) && defined(CONSPEED) 197 btinfo_console.speed = CONSPEED; 198 #else 199 btinfo_console.speed = 9600; 200 #endif 201 #else /* !SUPPORT_SERIAL */ 202 strncpy(btinfo_console.devname, "pc", 16); 203 #endif /* SUPPORT_SERIAL */ 204 } 205 206 static inline void 207 internal_putchar(c) 208 int c; 209 { 210 #ifdef SUPPORT_SERIAL 211 switch (iodev) { 212 case CONSDEV_PC: 213 #endif 214 conputc(c); 215 #ifdef SUPPORT_SERIAL 216 break; 217 case CONSDEV_COM0: 218 case CONSDEV_COM1: 219 case CONSDEV_COM2: 220 case CONSDEV_COM3: 221 computc(c, SERIAL_ARG); 222 break; 223 } 224 #endif 225 } 226 227 void 228 putchar(c) 229 int c; 230 { 231 if (c == '\n') 232 internal_putchar('\r'); 233 internal_putchar(c); 234 } 235 236 int 237 getchar() 238 { 239 #ifdef SUPPORT_SERIAL 240 int c; 241 switch (iodev) { 242 default: /* to make gcc -Wall happy... */ 243 case CONSDEV_PC: 244 #endif 245 return (congetc()); 246 #ifdef SUPPORT_SERIAL 247 case CONSDEV_COM0: 248 case CONSDEV_COM1: 249 case CONSDEV_COM2: 250 case CONSDEV_COM3: 251 #ifdef DIRECT_SERIAL 252 c = comgetc(SERIAL_ARG); 253 #else 254 do { 255 c = comgetc(SERIAL_ARG); 256 } while ((c >> 8) == 0xe0); /* catch timeout */ 257 #ifdef COMDEBUG 258 if (c & 0x8000) { 259 printf("com input %x, status %x\n", 260 c, comstatus(SERIAL_ARG)); 261 } 262 #endif 263 c &= 0xff; 264 #endif /* DIRECT_SERIAL */ 265 return (c); 266 } 267 #endif /* SUPPORT_SERIAL */ 268 } 269 270 int 271 iskey() 272 { 273 #ifdef SUPPORT_SERIAL 274 switch (iodev) { 275 default: /* to make gcc -Wall happy... */ 276 case CONSDEV_PC: 277 #endif 278 return (coniskey()); 279 #ifdef SUPPORT_SERIAL 280 case CONSDEV_COM0: 281 case CONSDEV_COM1: 282 case CONSDEV_COM2: 283 case CONSDEV_COM3: 284 #ifdef DIRECT_SERIAL 285 return(!!comstatus_d(SERIAL_ARG)); 286 #else 287 return (!!(comstatus(SERIAL_ARG) & 0x0100)); 288 #endif 289 } 290 #endif /* SUPPORT_SERIAL */ 291 } 292 293 char 294 awaitkey(timeout, tell) 295 int timeout, tell; 296 { 297 int i; 298 char c = 0; 299 300 i = timeout * POLL_FREQ; 301 302 while (i) { 303 if (tell && (i % POLL_FREQ) == 0) 304 printf("%d\b", i/POLL_FREQ); 305 if (iskey()) { 306 /* flush input buffer */ 307 while (iskey()) 308 c = getchar(); 309 goto out; /* XXX what happens if c == 0? */ 310 } 311 delay(1000000 / POLL_FREQ); 312 i--; 313 } 314 315 out: 316 if (tell) 317 printf("0\n"); 318 319 return(c); 320 } 321
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