| 1 | /*- |
| 2 | * Copyright (c) 1998 Michael Smith (msmith@freebsd.org) |
| 3 | * Copyright (c) 1997 Kazutaka YOKOTA (yokota@zodiac.mech.utsunomiya-u.ac.jp) |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 | * SUCH DAMAGE. |
| 26 | * |
| 27 | * Id: probe_keyboard.c,v 1.13 1997/06/09 05:10:55 bde Exp |
| 28 | * $FreeBSD: src/sys/boot/i386/libi386/vidconsole.c,v 1.19 2003/08/25 23:28:31 obrien Exp $ |
| 29 | * $DragonFly: src/sys/boot/pc32/libi386/vidconsole.c,v 1.3 2003/11/10 06:08:36 dillon Exp $ |
| 30 | */ |
| 31 | |
| 32 | #include <stand.h> |
| 33 | #include <bootstrap.h> |
| 34 | #include <btxv86.h> |
| 35 | #include <machine/psl.h> |
| 36 | #include "libi386.h" |
| 37 | |
| 38 | #if KEYBOARD_PROBE |
| 39 | #include <machine/cpufunc.h> |
| 40 | |
| 41 | static int probe_keyboard(void); |
| 42 | #endif |
| 43 | static void vidc_probe(struct console *cp); |
| 44 | static int vidc_init(int arg); |
| 45 | static void vidc_putchar(int c); |
| 46 | static int vidc_getchar(void); |
| 47 | static int vidc_ischar(void); |
| 48 | |
| 49 | static int vidc_started; |
| 50 | |
| 51 | #ifdef TERM_EMU |
| 52 | #define MAXARGS 8 |
| 53 | #define DEFAULT_FGCOLOR 7 |
| 54 | #define DEFAULT_BGCOLOR 0 |
| 55 | |
| 56 | void end_term(void); |
| 57 | void bail_out(int c); |
| 58 | void vidc_term_emu(int c); |
| 59 | void get_pos(void); |
| 60 | void curs_move(int x, int y); |
| 61 | void write_char(int c, int fg, int bg); |
| 62 | void scroll_up(int rows, int fg, int bg); |
| 63 | void CD(void); |
| 64 | void CM(void); |
| 65 | void HO(void); |
| 66 | |
| 67 | static int args[MAXARGS], argc; |
| 68 | static int fg_c, bg_c, curx, cury; |
| 69 | static int esc; |
| 70 | #endif |
| 71 | |
| 72 | |
| 73 | struct console vidconsole = { |
| 74 | "vidconsole", |
| 75 | "internal video/keyboard", |
| 76 | 0, |
| 77 | vidc_probe, |
| 78 | vidc_init, |
| 79 | vidc_putchar, |
| 80 | vidc_getchar, |
| 81 | vidc_ischar |
| 82 | }; |
| 83 | |
| 84 | static void |
| 85 | vidc_probe(struct console *cp) |
| 86 | { |
| 87 | |
| 88 | /* look for a keyboard */ |
| 89 | #if KEYBOARD_PROBE |
| 90 | if (probe_keyboard()) |
| 91 | #endif |
| 92 | { |
| 93 | |
| 94 | cp->c_flags |= C_PRESENTIN; |
| 95 | } |
| 96 | |
| 97 | /* XXX for now, always assume we can do BIOS screen output */ |
| 98 | cp->c_flags |= C_PRESENTOUT; |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | vidc_init(int arg) |
| 103 | { |
| 104 | int i; |
| 105 | |
| 106 | if (vidc_started && arg == 0) |
| 107 | return (0); |
| 108 | vidc_started = 1; |
| 109 | #ifdef TERM_EMU |
| 110 | /* Init terminal emulator */ |
| 111 | end_term(); |
| 112 | get_pos(); |
| 113 | curs_move(curx, cury); |
| 114 | fg_c = DEFAULT_FGCOLOR; |
| 115 | bg_c = DEFAULT_BGCOLOR; |
| 116 | #endif |
| 117 | for (i = 0; i < 10 && vidc_ischar(); i++) |
| 118 | (void)vidc_getchar(); |
| 119 | return (0); /* XXX reinit? */ |
| 120 | } |
| 121 | |
| 122 | static void |
| 123 | vidc_biosputchar(int c) |
| 124 | { |
| 125 | |
| 126 | v86.ctl = 0; |
| 127 | v86.addr = 0x10; |
| 128 | v86.eax = 0xe00 | (c & 0xff); |
| 129 | v86.ebx = 0x7; |
| 130 | v86int(); |
| 131 | } |
| 132 | |
| 133 | static void |
| 134 | vidc_rawputchar(int c) |
| 135 | { |
| 136 | int i; |
| 137 | |
| 138 | if (c == '\t') |
| 139 | /* lame tab expansion */ |
| 140 | for (i = 0; i < 8; i++) |
| 141 | vidc_rawputchar(' '); |
| 142 | else { |
| 143 | #ifndef TERM_EMU |
| 144 | vidc_biosputchar(c); |
| 145 | #else |
| 146 | /* Emulate AH=0eh (teletype output) */ |
| 147 | switch(c) { |
| 148 | case '\a': |
| 149 | vidc_biosputchar(c); |
| 150 | return; |
| 151 | case '\r': |
| 152 | curx = 0; |
| 153 | curs_move(curx, cury); |
| 154 | return; |
| 155 | case '\n': |
| 156 | cury++; |
| 157 | if (cury > 24) { |
| 158 | scroll_up(1, fg_c, bg_c); |
| 159 | cury--; |
| 160 | } else { |
| 161 | curs_move(curx, cury); |
| 162 | } |
| 163 | return; |
| 164 | case '\b': |
| 165 | if (curx > 0) { |
| 166 | curx--; |
| 167 | curs_move(curx, cury); |
| 168 | /* write_char(' ', fg_c, bg_c); XXX destructive(!) */ |
| 169 | return; |
| 170 | } |
| 171 | return; |
| 172 | default: |
| 173 | write_char(c, fg_c, bg_c); |
| 174 | curx++; |
| 175 | if (curx > 79) { |
| 176 | curx = 0; |
| 177 | cury++; |
| 178 | } |
| 179 | if (cury > 24) { |
| 180 | curx = 0; |
| 181 | scroll_up(1, fg_c, bg_c); |
| 182 | cury--; |
| 183 | } |
| 184 | } |
| 185 | curs_move(curx, cury); |
| 186 | #endif |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | #ifdef TERM_EMU |
| 191 | |
| 192 | /* Get cursor position on the screen. Result is in edx. Sets |
| 193 | * curx and cury appropriately. |
| 194 | */ |
| 195 | void |
| 196 | get_pos(void) |
| 197 | { |
| 198 | |
| 199 | v86.ctl = 0; |
| 200 | v86.addr = 0x10; |
| 201 | v86.eax = 0x0300; |
| 202 | v86.ebx = 0x0; |
| 203 | v86int(); |
| 204 | curx = v86.edx & 0x00ff; |
| 205 | cury = (v86.edx & 0xff00) >> 8; |
| 206 | } |
| 207 | |
| 208 | /* Move cursor to x rows and y cols (0-based). */ |
| 209 | void |
| 210 | curs_move(int x, int y) |
| 211 | { |
| 212 | |
| 213 | v86.ctl = 0; |
| 214 | v86.addr = 0x10; |
| 215 | v86.eax = 0x0200; |
| 216 | v86.ebx = 0x0; |
| 217 | v86.edx = ((0x00ff & y) << 8) + (0x00ff & x); |
| 218 | v86int(); |
| 219 | curx = x; |
| 220 | cury = y; |
| 221 | /* If there is ctrl char at this position, cursor would be invisible. |
| 222 | * Make it a space instead. |
| 223 | */ |
| 224 | v86.ctl = 0; |
| 225 | v86.addr = 0x10; |
| 226 | v86.eax = 0x0800; |
| 227 | v86.ebx = 0x0; |
| 228 | v86int(); |
| 229 | #define isvisible(c) (((c) >= 32) && ((c) < 255)) |
| 230 | if (!isvisible(v86.eax & 0x00ff)) { |
| 231 | write_char(' ', fg_c, bg_c); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* Scroll up the whole window by a number of rows. If rows==0, |
| 236 | * clear the window. fg and bg are attributes for the new lines |
| 237 | * inserted in the window. |
| 238 | */ |
| 239 | void |
| 240 | scroll_up(int rows, int fgcol, int bgcol) |
| 241 | { |
| 242 | |
| 243 | if (rows == 0) |
| 244 | rows = 25; |
| 245 | v86.ctl = 0; |
| 246 | v86.addr = 0x10; |
| 247 | v86.eax = 0x0600 + (0x00ff & rows); |
| 248 | v86.ebx = (bgcol << 12) + (fgcol << 8); |
| 249 | v86.ecx = 0x0; |
| 250 | v86.edx = 0x184f; |
| 251 | v86int(); |
| 252 | } |
| 253 | |
| 254 | /* Write character and attribute at cursor position. */ |
| 255 | void |
| 256 | write_char(int c, int fgcol, int bgcol) |
| 257 | { |
| 258 | |
| 259 | v86.ctl = 0; |
| 260 | v86.addr = 0x10; |
| 261 | v86.eax = 0x0900 + (0x00ff & c); |
| 262 | v86.ebx = (bgcol << 4) + fgcol; |
| 263 | v86.ecx = 0x1; |
| 264 | v86int(); |
| 265 | } |
| 266 | |
| 267 | /**************************************************************/ |
| 268 | /* |
| 269 | * Screen manipulation functions. They use accumulated data in |
| 270 | * args[] and argc variables. |
| 271 | * |
| 272 | */ |
| 273 | |
| 274 | /* Clear display from current position to end of screen */ |
| 275 | void |
| 276 | CD(void) |
| 277 | { |
| 278 | |
| 279 | get_pos(); |
| 280 | if (curx > 0) { |
| 281 | v86.ctl = 0; |
| 282 | v86.addr = 0x10; |
| 283 | v86.eax = 0x0600; |
| 284 | v86.ebx = (bg_c << 4) + fg_c; |
| 285 | v86.ecx = (cury << 8) + curx; |
| 286 | v86.edx = (cury << 8) + 79; |
| 287 | v86int(); |
| 288 | if (++cury > 24) { |
| 289 | end_term(); |
| 290 | return; |
| 291 | } |
| 292 | } |
| 293 | v86.ctl = 0; |
| 294 | v86.addr = 0x10; |
| 295 | v86.eax = 0x0600; |
| 296 | v86.ebx = (bg_c << 4) + fg_c; |
| 297 | v86.ecx = (cury << 8) + 0; |
| 298 | v86.edx = (24 << 8) + 79; |
| 299 | v86int(); |
| 300 | end_term(); |
| 301 | } |
| 302 | |
| 303 | /* Absolute cursor move to args[0] rows and args[1] columns |
| 304 | * (the coordinates are 1-based). |
| 305 | */ |
| 306 | void |
| 307 | CM(void) |
| 308 | { |
| 309 | |
| 310 | if (args[0] > 0) |
| 311 | args[0]--; |
| 312 | if (args[1] > 0) |
| 313 | args[1]--; |
| 314 | curs_move(args[1], args[0]); |
| 315 | end_term(); |
| 316 | } |
| 317 | |
| 318 | /* Home cursor (left top corner) */ |
| 319 | void |
| 320 | HO(void) |
| 321 | { |
| 322 | |
| 323 | argc = 1; |
| 324 | args[0] = args[1] = 1; |
| 325 | CM(); |
| 326 | } |
| 327 | |
| 328 | /* Clear internal state of the terminal emulation code */ |
| 329 | void |
| 330 | end_term(void) |
| 331 | { |
| 332 | |
| 333 | esc = 0; |
| 334 | argc = -1; |
| 335 | } |
| 336 | |
| 337 | /* Gracefully exit ESC-sequence processing in case of misunderstanding */ |
| 338 | void |
| 339 | bail_out(int c) |
| 340 | { |
| 341 | char buf[16], *ch; |
| 342 | int i; |
| 343 | |
| 344 | if (esc) { |
| 345 | vidc_rawputchar('\033'); |
| 346 | if (esc != '\033') |
| 347 | vidc_rawputchar(esc); |
| 348 | for (i = 0; i <= argc; ++i) { |
| 349 | sprintf(buf, "%d", args[i]); |
| 350 | ch = buf; |
| 351 | while (*ch) |
| 352 | vidc_rawputchar(*ch++); |
| 353 | } |
| 354 | } |
| 355 | vidc_rawputchar(c); |
| 356 | end_term(); |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | get_arg(c) |
| 361 | { |
| 362 | |
| 363 | if (argc < 0) |
| 364 | argc = 0; |
| 365 | args[argc] *= 10; |
| 366 | args[argc] += c - '0'; |
| 367 | } |
| 368 | |
| 369 | /* Emulate basic capabilities of cons25 terminal */ |
| 370 | void |
| 371 | vidc_term_emu(int c) |
| 372 | { |
| 373 | static int ansi_col[] = { |
| 374 | 0, 4, 2, 6, 1, 5, 3, 7, |
| 375 | }; |
| 376 | int t; |
| 377 | int i; |
| 378 | |
| 379 | switch (esc) { |
| 380 | case 0: |
| 381 | switch (c) { |
| 382 | case '\033': |
| 383 | esc = c; |
| 384 | break; |
| 385 | default: |
| 386 | vidc_rawputchar(c); |
| 387 | break; |
| 388 | } |
| 389 | break; |
| 390 | |
| 391 | case '\033': |
| 392 | switch (c) { |
| 393 | case '[': |
| 394 | esc = c; |
| 395 | args[0] = 0; |
| 396 | argc = -1; |
| 397 | break; |
| 398 | default: |
| 399 | bail_out(c); |
| 400 | break; |
| 401 | } |
| 402 | break; |
| 403 | |
| 404 | case '[': |
| 405 | switch (c) { |
| 406 | case ';': |
| 407 | if (argc < 0) /* XXX */ |
| 408 | argc = 0; |
| 409 | else if (argc + 1 >= MAXARGS) |
| 410 | bail_out(c); |
| 411 | else |
| 412 | args[++argc] = 0; |
| 413 | break; |
| 414 | case 'H': |
| 415 | if (argc < 0) |
| 416 | HO(); |
| 417 | else if (argc == 1) |
| 418 | CM(); |
| 419 | else |
| 420 | bail_out(c); |
| 421 | break; |
| 422 | case 'J': |
| 423 | if (argc < 0) |
| 424 | CD(); |
| 425 | else |
| 426 | bail_out(c); |
| 427 | break; |
| 428 | case 'm': |
| 429 | if (argc < 0) { |
| 430 | fg_c = DEFAULT_FGCOLOR; |
| 431 | bg_c = DEFAULT_BGCOLOR; |
| 432 | } |
| 433 | for (i = 0; i <= argc; ++i) { |
| 434 | switch (args[i]) { |
| 435 | case 0: /* back to normal */ |
| 436 | fg_c = DEFAULT_FGCOLOR; |
| 437 | bg_c = DEFAULT_BGCOLOR; |
| 438 | break; |
| 439 | case 1: /* bold */ |
| 440 | fg_c |= 0x8; |
| 441 | break; |
| 442 | case 4: /* underline */ |
| 443 | case 5: /* blink */ |
| 444 | bg_c |= 0x8; |
| 445 | break; |
| 446 | case 7: /* reverse */ |
| 447 | t = fg_c; |
| 448 | fg_c = bg_c; |
| 449 | bg_c = t; |
| 450 | break; |
| 451 | case 30: case 31: case 32: case 33: |
| 452 | case 34: case 35: case 36: case 37: |
| 453 | fg_c = ansi_col[args[i] - 30]; |
| 454 | break; |
| 455 | case 39: /* normal */ |
| 456 | fg_c = DEFAULT_FGCOLOR; |
| 457 | break; |
| 458 | case 40: case 41: case 42: case 43: |
| 459 | case 44: case 45: case 46: case 47: |
| 460 | bg_c = ansi_col[args[i] - 40]; |
| 461 | break; |
| 462 | case 49: /* normal */ |
| 463 | bg_c = DEFAULT_BGCOLOR; |
| 464 | break; |
| 465 | } |
| 466 | } |
| 467 | end_term(); |
| 468 | break; |
| 469 | default: |
| 470 | if (isdigit(c)) |
| 471 | get_arg(c); |
| 472 | else |
| 473 | bail_out(c); |
| 474 | break; |
| 475 | } |
| 476 | break; |
| 477 | |
| 478 | default: |
| 479 | bail_out(c); |
| 480 | break; |
| 481 | } |
| 482 | } |
| 483 | #endif |
| 484 | |
| 485 | static void |
| 486 | vidc_putchar(int c) |
| 487 | { |
| 488 | #ifdef TERM_EMU |
| 489 | vidc_term_emu(c); |
| 490 | #else |
| 491 | vidc_rawputchar(c); |
| 492 | #endif |
| 493 | } |
| 494 | |
| 495 | static int |
| 496 | vidc_getchar(void) |
| 497 | { |
| 498 | |
| 499 | if (vidc_ischar()) { |
| 500 | v86.ctl = 0; |
| 501 | v86.addr = 0x16; |
| 502 | v86.eax = 0x0; |
| 503 | v86int(); |
| 504 | return (v86.eax & 0xff); |
| 505 | } else { |
| 506 | return (-1); |
| 507 | } |
| 508 | } |
| 509 | |
| 510 | static int |
| 511 | vidc_ischar(void) |
| 512 | { |
| 513 | |
| 514 | v86.ctl = V86_FLAGS; |
| 515 | v86.addr = 0x16; |
| 516 | v86.eax = 0x100; |
| 517 | v86int(); |
| 518 | return (!(v86.efl & PSL_Z)); |
| 519 | } |
| 520 | |
| 521 | #if KEYBOARD_PROBE |
| 522 | |
| 523 | #define PROBE_MAXRETRY 5 |
| 524 | #define PROBE_MAXWAIT 400 |
| 525 | #define IO_DUMMY 0x84 |
| 526 | #define IO_KBD 0x060 /* 8042 Keyboard */ |
| 527 | |
| 528 | /* selected defines from kbdio.h */ |
| 529 | #define KBD_STATUS_PORT 4 /* status port, read */ |
| 530 | #define KBD_DATA_PORT 0 /* data port, read/write |
| 531 | * also used as keyboard command |
| 532 | * and mouse command port |
| 533 | */ |
| 534 | #define KBDC_ECHO 0x00ee |
| 535 | #define KBDS_ANY_BUFFER_FULL 0x0001 |
| 536 | #define KBDS_INPUT_BUFFER_FULL 0x0002 |
| 537 | #define KBD_ECHO 0x00ee |
| 538 | |
| 539 | /* 7 microsec delay necessary for some keyboard controllers */ |
| 540 | static void |
| 541 | delay7(void) |
| 542 | { |
| 543 | /* |
| 544 | * I know this is broken, but no timer is available yet at this stage... |
| 545 | * See also comments in `delay1ms()'. |
| 546 | */ |
| 547 | inb(IO_DUMMY); inb(IO_DUMMY); |
| 548 | inb(IO_DUMMY); inb(IO_DUMMY); |
| 549 | inb(IO_DUMMY); inb(IO_DUMMY); |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * This routine uses an inb to an unused port, the time to execute that |
| 554 | * inb is approximately 1.25uS. This value is pretty constant across |
| 555 | * all CPU's and all buses, with the exception of some PCI implentations |
| 556 | * that do not forward this I/O address to the ISA bus as they know it |
| 557 | * is not a valid ISA bus address, those machines execute this inb in |
| 558 | * 60 nS :-(. |
| 559 | * |
| 560 | */ |
| 561 | static void |
| 562 | delay1ms(void) |
| 563 | { |
| 564 | int i = 800; |
| 565 | while (--i >= 0) |
| 566 | (void)inb(0x84); |
| 567 | } |
| 568 | |
| 569 | /* |
| 570 | * We use the presence/absence of a keyboard to determine whether the internal |
| 571 | * console can be used for input. |
| 572 | * |
| 573 | * Perform a simple test on the keyboard; issue the ECHO command and see |
| 574 | * if the right answer is returned. We don't do anything as drastic as |
| 575 | * full keyboard reset; it will be too troublesome and take too much time. |
| 576 | */ |
| 577 | static int |
| 578 | probe_keyboard(void) |
| 579 | { |
| 580 | int retry = PROBE_MAXRETRY; |
| 581 | int wait; |
| 582 | int i; |
| 583 | |
| 584 | while (--retry >= 0) { |
| 585 | /* flush any noise */ |
| 586 | while (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL) { |
| 587 | delay7(); |
| 588 | inb(IO_KBD + KBD_DATA_PORT); |
| 589 | delay1ms(); |
| 590 | } |
| 591 | |
| 592 | /* wait until the controller can accept a command */ |
| 593 | for (wait = PROBE_MAXWAIT; wait > 0; --wait) { |
| 594 | if (((i = inb(IO_KBD + KBD_STATUS_PORT)) |
| 595 | & (KBDS_INPUT_BUFFER_FULL | KBDS_ANY_BUFFER_FULL)) == 0) |
| 596 | break; |
| 597 | if (i & KBDS_ANY_BUFFER_FULL) { |
| 598 | delay7(); |
| 599 | inb(IO_KBD + KBD_DATA_PORT); |
| 600 | } |
| 601 | delay1ms(); |
| 602 | } |
| 603 | if (wait <= 0) |
| 604 | continue; |
| 605 | |
| 606 | /* send the ECHO command */ |
| 607 | outb(IO_KBD + KBD_DATA_PORT, KBDC_ECHO); |
| 608 | |
| 609 | /* wait for a response */ |
| 610 | for (wait = PROBE_MAXWAIT; wait > 0; --wait) { |
| 611 | if (inb(IO_KBD + KBD_STATUS_PORT) & KBDS_ANY_BUFFER_FULL) |
| 612 | break; |
| 613 | delay1ms(); |
| 614 | } |
| 615 | if (wait <= 0) |
| 616 | continue; |
| 617 | |
| 618 | delay7(); |
| 619 | i = inb(IO_KBD + KBD_DATA_PORT); |
| 620 | #ifdef PROBE_KBD_BEBUG |
| 621 | printf("probe_keyboard: got 0x%x.\n", i); |
| 622 | #endif |
| 623 | if (i == KBD_ECHO) { |
| 624 | /* got the right answer */ |
| 625 | return (0); |
| 626 | } |
| 627 | } |
| 628 | |
| 629 | return (1); |
| 630 | } |
| 631 | #endif /* KEYBOARD_PROBE */ |