pcio.c revision 1.15
1 /* $NetBSD: pcio.c,v 1.15 2003/10/08 04:25:45 lukem 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 #include <sys/bootblock.h> 43 44 #include "libi386.h" 45 #include "bootinfo.h" 46 47 extern void conputc __P((int)); 48 extern int congetc __P((void)); 49 extern int coniskey __P((void)); 50 extern struct x86_boot_params boot_params; 51 52 struct btinfo_console btinfo_console; 53 54 #ifdef SUPPORT_SERIAL 55 static int iodev; 56 57 #ifdef DIRECT_SERIAL 58 #include "comio_direct.h" 59 60 #define cominit_x() cominit_d(btinfo_console.addr, btinfo_console.speed) 61 #define computc_x(ch) computc_d(ch, btinfo_console.addr) 62 #define comgetc_x() comgetc_d(btinfo_console.addr) 63 #define comstatus_x() comstatus_d(btinfo_console.addr) 64 65 #else 66 #define cominit_x() cominit(iodev - CONSDEV_COM0) 67 #define computc_x(ch) computc(ch, iodev - CONSDEV_COM0) 68 #define comgetc_x() comgetc(iodev - CONSDEV_COM0) 69 #define comstatus_x() comstatus(iodev - CONSDEV_COM0) 70 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((void *)(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 #if defined(DIRECT_SERIAL) && defined(CONSPEED) 98 btinfo_console.speed = CONSPEED; 99 #else 100 btinfo_console.speed = 9600; 101 #endif 102 103 switch (dev) { 104 case CONSDEV_AUTO: 105 for(i = 0; i < 3; i++) { 106 iodev = CONSDEV_COM0 + i; 107 btinfo_console.addr = getcomaddr(i); 108 if(!btinfo_console.addr) 109 break; 110 conputc('0' + i); /* to tell user what happens */ 111 cominit_x(); 112 #ifdef DIRECT_SERIAL 113 /* check for: 114 * 1. successful output 115 * 2. optionally, keypress within 7s 116 */ 117 if ( computc_x(':') && 118 computc_x('-') && 119 computc_x('(') 120 #ifdef COMCONS_KEYPRESS 121 && awaitkey(7, 0) 122 #endif 123 ) 124 goto ok; 125 #else /* ! DIRECT_SERIAL */ 126 /* 127 * serial console must have hardware handshake! 128 * check: 129 * 1. character output without error 130 * 2. status bits for modem ready set 131 * (status seems only useful after character output) 132 * 3. optionally, keypress within 7s 133 */ 134 if (!(computc_x('@') & 0x80) 135 && (comstatus_x() & 0x00b0) 136 #ifdef COMCONS_KEYPRESS 137 && awaitkey(7, 0) 138 #endif 139 ) 140 goto ok; 141 #endif /* DIRECT_SERIAL */ 142 } 143 iodev = CONSDEV_PC; 144 ok: 145 break; 146 case CONSDEV_COM0: 147 case CONSDEV_COM1: 148 case CONSDEV_COM2: 149 case CONSDEV_COM3: 150 iodev = dev; 151 btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0); 152 if(!btinfo_console.addr) 153 goto nocom; 154 cominit_x(); 155 break; 156 case CONSDEV_COM0KBD: 157 case CONSDEV_COM1KBD: 158 case CONSDEV_COM2KBD: 159 case CONSDEV_COM3KBD: 160 iodev = dev - 4; 161 i = iodev - CONSDEV_COM0; 162 btinfo_console.addr = getcomaddr(i); 163 if(!btinfo_console.addr) 164 goto nocom; 165 conputc('0' + i); /* to tell user what happens */ 166 cominit_x(); 167 #ifdef DIRECT_SERIAL 168 /* check for: 169 * 1. successful output 170 * 2. optionally, keypress within 7s 171 */ 172 if ( computc_x(':') && 173 computc_x('-') && 174 computc_x('(') 175 #ifdef COMCONS_KEYPRESS 176 && awaitkey(7, 0) 177 #endif 178 ) 179 break; 180 #else /* ! DIRECT_SERIAL */ 181 /* 182 * serial console must have hardware handshake! 183 * check: 184 * 1. character output without error 185 * 2. status bits for modem ready set 186 * (status seems only useful after character output) 187 * 3. optionally, keypress within 7s 188 */ 189 if (!(computc_x('@') & 0x80) 190 && (comstatus_x() & 0x00b0) 191 #ifdef COMCONS_KEYPRESS 192 && awaitkey(7, 0) 193 #endif 194 ) 195 break; 196 #endif /* DIRECT_SERIAL */ 197 default: 198 nocom: 199 iodev = CONSDEV_PC; 200 break; 201 } 202 conputc('\015'); 203 conputc('\n'); 204 strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16); 205 #else /* !SUPPORT_SERIAL */ 206 btinfo_console.devname[0] = 'p'; 207 btinfo_console.devname[1] = 'c'; 208 btinfo_console.devname[2] = 0; 209 #endif /* SUPPORT_SERIAL */ 210 } 211 212 static inline void internal_putchar __P((int)); 213 214 static inline void 215 internal_putchar(c) 216 int c; 217 { 218 #ifdef SUPPORT_SERIAL 219 switch (iodev) { 220 case CONSDEV_PC: 221 #endif 222 conputc(c); 223 #ifdef SUPPORT_SERIAL 224 break; 225 case CONSDEV_COM0: 226 case CONSDEV_COM1: 227 case CONSDEV_COM2: 228 case CONSDEV_COM3: 229 computc_x(c); 230 break; 231 } 232 #endif 233 } 234 235 void 236 putchar(c) 237 int c; 238 { 239 if (c == '\n') 240 internal_putchar('\r'); 241 internal_putchar(c); 242 } 243 244 int 245 getchar() 246 { 247 #ifdef SUPPORT_SERIAL 248 int c; 249 switch (iodev) { 250 default: /* to make gcc -Wall happy... */ 251 case CONSDEV_PC: 252 #endif 253 return (congetc()); 254 #ifdef SUPPORT_SERIAL 255 case CONSDEV_COM0: 256 case CONSDEV_COM1: 257 case CONSDEV_COM2: 258 case CONSDEV_COM3: 259 #ifdef DIRECT_SERIAL 260 c = comgetc_x(); 261 #else 262 do { 263 c = comgetc_x(); 264 } while ((c >> 8) == 0xe0); /* catch timeout */ 265 #ifdef COMDEBUG 266 if (c & 0x8000) { 267 printf("com input %x, status %x\n", 268 c, comstatus_x()); 269 } 270 #endif 271 c &= 0xff; 272 #endif /* DIRECT_SERIAL */ 273 return (c); 274 } 275 #endif /* SUPPORT_SERIAL */ 276 } 277 278 int 279 iskey() 280 { 281 #ifdef SUPPORT_SERIAL 282 switch (iodev) { 283 default: /* to make gcc -Wall happy... */ 284 case CONSDEV_PC: 285 #endif 286 return (coniskey()); 287 #ifdef SUPPORT_SERIAL 288 case CONSDEV_COM0: 289 case CONSDEV_COM1: 290 case CONSDEV_COM2: 291 case CONSDEV_COM3: 292 #ifdef DIRECT_SERIAL 293 return(!!comstatus_x()); 294 #else 295 return (!!(comstatus_x() & 0x0100)); 296 #endif 297 } 298 #endif /* SUPPORT_SERIAL */ 299 } 300 301 char 302 awaitkey(timeout, tell) 303 int timeout, tell; 304 { 305 int i; 306 char c = 0; 307 308 i = timeout * POLL_FREQ; 309 310 while (i) { 311 if (tell && (i % POLL_FREQ) == 0) { 312 char numbuf[20]; 313 int len, j; 314 315 sprintf(numbuf, "%d ", i/POLL_FREQ); 316 len = strlen(numbuf); 317 for (j = 0; j < len; j++) 318 numbuf[len + j] = '\b'; 319 numbuf[len + j] = '\0'; 320 printf(numbuf); 321 } 322 if (iskey()) { 323 /* flush input buffer */ 324 while (iskey()) 325 c = getchar(); 326 if (c == 0) 327 c = -1; 328 goto out; 329 } 330 delay(1000000 / POLL_FREQ); 331 i--; 332 } 333 334 out: 335 if (tell) 336 printf("0\n"); 337 338 return(c); 339 } 340
Indexes created Tue Sep 30 20:09:53 GMT 2025