1 /* $NetBSD: pcio.c,v 1.21 2006/01/30 04:25:44 junyoung 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 * 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 29 /* 30 * console I/O 31 * needs lowlevel routines from conio.S and comio.S 32 */ 33 34 #include <lib/libsa/stand.h> 35 #include <lib/libkern/libkern.h> 36 #include <sys/bootblock.h> 37 38 #include "libi386.h" 39 #include "bootinfo.h" 40 41 extern void conputc(int); 42 extern int congetc(void); 43 extern int conisshift(void); 44 extern int coniskey(void); 45 extern struct x86_boot_params boot_params; 46 47 struct btinfo_console btinfo_console; 48 49 #ifdef SUPPORT_SERIAL 50 static int iodev; 51 52 #ifdef DIRECT_SERIAL 53 #include "comio_direct.h" 54 55 #define cominit_x() btinfo_console.speed = \ 56 cominit_d(btinfo_console.addr, btinfo_console.speed) 57 #define computc_x(ch) computc_d(ch, btinfo_console.addr) 58 #define comgetc_x() comgetc_d(btinfo_console.addr) 59 #define comstatus_x() comstatus_d(btinfo_console.addr) 60 61 #else 62 #define cominit_x() cominit(iodev - CONSDEV_COM0) 63 #define computc_x(ch) computc(ch, iodev - CONSDEV_COM0) 64 #define comgetc_x() comgetc(iodev - CONSDEV_COM0) 65 #define comstatus_x() comstatus(iodev - CONSDEV_COM0) 66 67 #endif /* DIRECT_SERIAL */ 68 69 static int getcomaddr(int); 70 #endif /* SUPPORT_SERIAL */ 71 72 #define POLL_FREQ 10 73 74 #ifdef SUPPORT_SERIAL 75 static int 76 getcomaddr(int idx) 77 { 78 short addr; 79 #ifdef CONSADDR 80 if (CONSADDR != 0) 81 return CONSADDR; 82 #endif 83 /* read in BIOS data area */ 84 pvbcopy((void *)(0x400 + 2 * idx), &addr, 2); 85 return addr; 86 } 87 #endif 88 89 void 90 initio(int dev) 91 { 92 #ifdef SUPPORT_SERIAL 93 int i; 94 95 #if defined(DIRECT_SERIAL) && defined(CONSPEED) 96 btinfo_console.speed = CONSPEED; 97 #else 98 btinfo_console.speed = 9600; 99 #endif 100 101 switch (dev) { 102 case CONSDEV_AUTO: 103 for(i = 0; i < 3; i++) { 104 iodev = CONSDEV_COM0 + i; 105 btinfo_console.addr = getcomaddr(i); 106 if(!btinfo_console.addr) 107 break; 108 conputc('0' + i); /* to tell user what happens */ 109 cominit_x(); 110 #ifdef DIRECT_SERIAL 111 /* check for: 112 * 1. successful output 113 * 2. optionally, keypress within 7s 114 */ 115 if ( computc_x(':') && 116 computc_x('-') && 117 computc_x('(') 118 #ifdef COMCONS_KEYPRESS 119 && awaitkey(7, 0) 120 #endif 121 ) 122 goto ok; 123 #else /* ! DIRECT_SERIAL */ 124 /* 125 * serial console must have hardware handshake! 126 * check: 127 * 1. character output without error 128 * 2. status bits for modem ready set 129 * (status seems only useful after character output) 130 * 3. optionally, keypress within 7s 131 */ 132 if (!(computc_x('@') & 0x80) 133 && (comstatus_x() & 0x00b0) 134 #ifdef COMCONS_KEYPRESS 135 && awaitkey(7, 0) 136 #endif 137 ) 138 goto ok; 139 #endif /* DIRECT_SERIAL */ 140 } 141 iodev = CONSDEV_PC; 142 ok: 143 break; 144 case CONSDEV_COM0: 145 case CONSDEV_COM1: 146 case CONSDEV_COM2: 147 case CONSDEV_COM3: 148 iodev = dev; 149 btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0); 150 if(!btinfo_console.addr) 151 goto nocom; 152 cominit_x(); 153 break; 154 case CONSDEV_COM0KBD: 155 case CONSDEV_COM1KBD: 156 case CONSDEV_COM2KBD: 157 case CONSDEV_COM3KBD: 158 iodev = dev - CONSDEV_COM0KBD + CONSDEV_COM0; 159 i = iodev - CONSDEV_COM0; 160 btinfo_console.addr = getcomaddr(i); 161 if(!btinfo_console.addr) 162 goto nocom; 163 conputc('0' + i); /* to tell user what happens */ 164 cominit_x(); 165 #ifdef DIRECT_SERIAL 166 /* check for: 167 * 1. successful output 168 * 2. optionally, keypress within 7s 169 */ 170 if ( computc_x(':') && 171 computc_x('-') && 172 computc_x('(') 173 #ifdef COMCONS_KEYPRESS 174 && awaitkey(7, 0) 175 #endif 176 ) 177 break; 178 #else /* ! DIRECT_SERIAL */ 179 /* 180 * serial console must have hardware handshake! 181 * check: 182 * 1. character output without error 183 * 2. status bits for modem ready set 184 * (status seems only useful after character output) 185 * 3. optionally, keypress within 7s 186 */ 187 if (!(computc_x('@') & 0x80) 188 && (comstatus_x() & 0x00b0) 189 #ifdef COMCONS_KEYPRESS 190 && awaitkey(7, 0) 191 #endif 192 ) 193 break; 194 #endif /* DIRECT_SERIAL */ 195 default: 196 nocom: 197 iodev = CONSDEV_PC; 198 break; 199 } 200 conputc('\015'); 201 conputc('\n'); 202 strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16); 203 #else /* !SUPPORT_SERIAL */ 204 btinfo_console.devname[0] = 'p'; 205 btinfo_console.devname[1] = 'c'; 206 btinfo_console.devname[2] = 0; 207 #endif /* SUPPORT_SERIAL */ 208 } 209 210 static inline void internal_putchar(int); 211 212 static inline void 213 internal_putchar(int c) 214 { 215 #ifdef SUPPORT_SERIAL 216 switch (iodev) { 217 case CONSDEV_PC: 218 #endif 219 conputc(c); 220 #ifdef SUPPORT_SERIAL 221 break; 222 case CONSDEV_COM0: 223 case CONSDEV_COM1: 224 case CONSDEV_COM2: 225 case CONSDEV_COM3: 226 computc_x(c); 227 break; 228 } 229 #endif 230 } 231 232 void 233 putchar(int c) 234 { 235 if (c == '\n') 236 internal_putchar('\r'); 237 internal_putchar(c); 238 } 239 240 int 241 getchar(void) 242 { 243 int c; 244 #ifdef SUPPORT_SERIAL 245 switch (iodev) { 246 default: /* to make gcc -Wall happy... */ 247 case CONSDEV_PC: 248 #endif 249 c = congetc(); 250 #ifdef CONSOLE_KEYMAP 251 { 252 char *cp = strchr(CONSOLE_KEYMAP, c); 253 if (cp != 0 && cp[1] != 0) 254 c = cp[1]; 255 } 256 #endif 257 return c; 258 #ifdef SUPPORT_SERIAL 259 case CONSDEV_COM0: 260 case CONSDEV_COM1: 261 case CONSDEV_COM2: 262 case CONSDEV_COM3: 263 #ifdef DIRECT_SERIAL 264 c = comgetc_x(); 265 #else 266 do { 267 c = comgetc_x(); 268 } while ((c >> 8) == 0xe0); /* catch timeout */ 269 #ifdef COMDEBUG 270 if (c & 0x8000) { 271 printf("com input %x, status %x\n", 272 c, comstatus_x()); 273 } 274 #endif 275 c &= 0xff; 276 #endif /* DIRECT_SERIAL */ 277 return c; 278 } 279 #endif /* SUPPORT_SERIAL */ 280 } 281 282 int 283 iskey(int intr) 284 { 285 #ifdef SUPPORT_SERIAL 286 switch (iodev) { 287 default: /* to make gcc -Wall happy... */ 288 case CONSDEV_PC: 289 #endif 290 return (intr && conisshift()) || coniskey(); 291 #ifdef SUPPORT_SERIAL 292 case CONSDEV_COM0: 293 case CONSDEV_COM1: 294 case CONSDEV_COM2: 295 case CONSDEV_COM3: 296 #ifdef DIRECT_SERIAL 297 return !!comstatus_x(); 298 #else 299 return !!(comstatus_x() & 0x0100); 300 #endif 301 } 302 #endif /* SUPPORT_SERIAL */ 303 } 304 305 char 306 awaitkey(int timeout, int tell) 307 { 308 int i; 309 char c = 0; 310 311 i = timeout * POLL_FREQ; 312 313 for (;;) { 314 if (tell && (i % POLL_FREQ) == 0) { 315 char numbuf[20]; 316 int len, j; 317 318 sprintf(numbuf, "%d ", i/POLL_FREQ); 319 len = strlen(numbuf); 320 for (j = 0; j < len; j++) 321 numbuf[len + j] = '\b'; 322 numbuf[len + j] = '\0'; 323 printf(numbuf); 324 } 325 if (iskey(1)) { 326 /* flush input buffer */ 327 while (iskey(0)) 328 c = getchar(); 329 if (c == 0) 330 c = -1; 331 goto out; 332 } 333 if (i--) 334 delay(1000000 / POLL_FREQ); 335 else 336 break; 337 } 338 339 out: 340 if (tell) 341 printf("0 \n"); 342 343 return c; 344 } 345