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1.1 ! nbrk 1: /*-
! 2: * Copyright (c) 2005-2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: /*
! 31: * console.c - pc console driver
! 32: */
! 33:
! 34: #include <driver.h>
! 35: #include <cpu.h>
! 36: #include <sys/tty.h>
! 37:
! 38: #define CRTC_INDEX 0x3d4
! 39: #define CRTC_DATA 0x3d5
! 40: #define GRAC_INDEX 0x3ce
! 41: #define GRAC_DATA 0x3cf
! 42:
! 43: #define VID_RAM 0xB8000
! 44:
! 45: static int console_init(void);
! 46: static int console_read(device_t, char *, size_t *, int);
! 47: static int console_write(device_t, char *, size_t *, int);
! 48: static int console_ioctl(device_t, int, u_long);
! 49:
! 50: /*
! 51: * Driver structure
! 52: */
! 53: struct driver console_drv = {
! 54: /* name */ "Console",
! 55: /* order */ 4,
! 56: /* init */ console_init,
! 57: };
! 58:
! 59: static struct devio console_io = {
! 60: /* open */ NULL,
! 61: /* close */ NULL,
! 62: /* read */ console_read,
! 63: /* write */ console_write,
! 64: /* ioctl */ console_ioctl,
! 65: /* event */ NULL,
! 66: };
! 67:
! 68: static device_t console_dev;
! 69: static struct tty console_tty;
! 70:
! 71: static short *vram;
! 72: static int pos_x;
! 73: static int pos_y;
! 74: static int cols;
! 75: static int rows;
! 76: static u_short attrib;
! 77:
! 78: static int esc_index;
! 79: static int esc_arg1;
! 80: static int esc_arg2;
! 81: static int esc_argc;
! 82: static int esc_saved_x;
! 83: static int esc_saved_y;
! 84:
! 85: static u_short ansi_colors[] = {0, 4, 2, 6, 1, 5, 3, 7};
! 86:
! 87: static void
! 88: scroll_up(void)
! 89: {
! 90: int i;
! 91:
! 92: memcpy(vram, vram + cols, cols * (rows - 1) * 2);
! 93: for (i = 0; i < cols; i++)
! 94: vram[cols * (rows - 1) + i] = ' ' | (attrib << 8);
! 95: }
! 96:
! 97: static void
! 98: move_cursor(void)
! 99: {
! 100: int pos = pos_y * cols + pos_x;
! 101:
! 102: irq_lock();
! 103: outb(0x0e, CRTC_INDEX);
! 104: outb((u_char)((pos >> 8) & 0xff), CRTC_DATA);
! 105: outb(0x0f, CRTC_INDEX);
! 106: outb((u_char)(pos & 0xff), CRTC_DATA);
! 107: irq_unlock();
! 108: }
! 109:
! 110: static void
! 111: reset_cursor(void)
! 112: {
! 113: int offset;
! 114:
! 115: irq_lock();
! 116: outb(0x0e, CRTC_INDEX);
! 117: offset = inb(CRTC_DATA);
! 118: offset <<= 8;
! 119: outb(0x0f, CRTC_INDEX);
! 120: offset += inb(CRTC_DATA);
! 121: pos_x = offset % cols;
! 122: pos_y = offset / cols;
! 123: irq_unlock();
! 124: }
! 125:
! 126: static void
! 127: new_line(void)
! 128: {
! 129:
! 130: pos_x = 0;
! 131: pos_y++;
! 132: if (pos_y >= rows) {
! 133: pos_y = rows - 1;
! 134: scroll_up();
! 135: }
! 136: }
! 137:
! 138: static void
! 139: clear_screen(void)
! 140: {
! 141: int i;
! 142:
! 143: for (i = 0; i < cols * rows; i++)
! 144: vram[i] = ' ' | (attrib << 8);
! 145: pos_x = 0;
! 146: pos_y = 0;
! 147: move_cursor();
! 148: }
! 149:
! 150: /*
! 151: * Check for escape code sequence.
! 152: * Rreturn true if escape
! 153: *
! 154: * <Support list>
! 155: * ESC[#;#H or : moves cursor to line #, column #
! 156: * ESC[#;#f
! 157: * ESC[#A : moves cursor up # lines
! 158: * ESC[#B : moves cursor down # lines
! 159: * ESC[#C : moves cursor right # spaces
! 160: * ESC[#D : moves cursor left # spaces
! 161: * ESC[#;#R : reports current cursor line & column
! 162: * ESC[s : save cursor position for recall later
! 163: * ESC[u : return to saved cursor position
! 164: * ESC[2J : clear screen and home cursor
! 165: * ESC[K : clear to end of line
! 166: * ESC[#m : attribute (0=attribure off, 4=underline, 5=blink)
! 167: */
! 168: static int
! 169: check_escape(char c)
! 170: {
! 171: int move = 0;
! 172: int val;
! 173: u_short color;
! 174:
! 175: if (c == 033) {
! 176: esc_index = 1;
! 177: esc_argc = 0;
! 178: return 1;
! 179: }
! 180: if (esc_index == 0)
! 181: return 0;
! 182:
! 183: if (c >= '0' && c <= '9') {
! 184: val = c - '0';
! 185: switch (esc_argc) {
! 186: case 0:
! 187: esc_arg1 = val;
! 188: esc_index++;
! 189: break;
! 190: case 1:
! 191: esc_arg1 = esc_arg1 * 10 + val;
! 192: break;
! 193: case 2:
! 194: esc_arg2 = val;
! 195: esc_index++;
! 196: break;
! 197: case 3:
! 198: esc_arg2 = esc_arg2 * 10 + val;
! 199: break;
! 200: default:
! 201: goto reset;
! 202: }
! 203: esc_argc++;
! 204: return 1;
! 205: }
! 206:
! 207: esc_index++;
! 208:
! 209: switch (esc_index) {
! 210: case 2:
! 211: if (c != '[')
! 212: goto reset;
! 213: return 1;
! 214: case 3:
! 215: switch (c) {
! 216: case 's': /* Save cursor position */
! 217: esc_saved_x = pos_x;
! 218: esc_saved_y = pos_y;
! 219: break;
! 220: case 'u': /* Return to saved cursor position */
! 221: pos_x = esc_saved_x;
! 222: pos_y = esc_saved_y;
! 223: move_cursor();
! 224: break;
! 225: case 'K': /* Clear to end of line */
! 226: break;
! 227: }
! 228: goto reset;
! 229: case 4:
! 230: switch (c) {
! 231: case 'A': /* Move cursor up # lines */
! 232: pos_y -= esc_arg1;
! 233: if (pos_y < 0)
! 234: pos_y = 0;
! 235: move = 1;
! 236: break;
! 237: case 'B': /* Move cursor down # lines */
! 238: pos_y += esc_arg1;
! 239: if (pos_y >= rows)
! 240: pos_y = rows - 1;
! 241: move = 1;
! 242: break;
! 243: case 'C': /* Move cursor forward # spaces */
! 244: pos_x += esc_arg1;
! 245: if (pos_x >= cols)
! 246: pos_x = cols - 1;
! 247: move = 1;
! 248: break;
! 249: case 'D': /* Move cursor back # spaces */
! 250: pos_x -= esc_arg1;
! 251: if (pos_x < 0)
! 252: pos_x = 0;
! 253: move = 1;
! 254: break;
! 255: case ';':
! 256: if (esc_argc == 1)
! 257: esc_argc = 2;
! 258: return 1;
! 259: case 'J':
! 260: if (esc_arg1 == 2) /* Clear screen */
! 261: clear_screen();
! 262: break;
! 263: case 'm': /* Change attribute */
! 264: switch (esc_arg1) {
! 265: case 0: /* reset */
! 266: attrib = 0x0F;
! 267: break;
! 268: case 1: /* bold */
! 269: attrib = 0x0F;
! 270: break;
! 271: case 4: /* under line */
! 272: break;
! 273: case 5: /* blink */
! 274: attrib |= 0x80;
! 275: break;
! 276: case 30: case 31: case 32: case 33:
! 277: case 34: case 35: case 36: case 37:
! 278: color = ansi_colors[esc_arg1 - 30];
! 279: attrib = (attrib & 0xf0) | color;
! 280: break;
! 281: case 40: case 41: case 42: case 43:
! 282: case 44: case 45: case 46: case 47:
! 283: color = ansi_colors[esc_arg1 - 40];
! 284: attrib = (attrib & 0x0f) | (color << 4);
! 285: break;
! 286: }
! 287: break;
! 288:
! 289: }
! 290: if (move)
! 291: move_cursor();
! 292: goto reset;
! 293: case 6:
! 294: switch (c) {
! 295: case 'H':
! 296: case 'f':
! 297: pos_y = esc_arg1;
! 298: pos_x = esc_arg2;
! 299: if (pos_y >= rows)
! 300: pos_y = rows - 1;
! 301: if (pos_x >= cols)
! 302: pos_x = cols - 1;
! 303: move_cursor();
! 304: break;
! 305: case 'R':
! 306: /* XXX */
! 307: break;
! 308: }
! 309: goto reset;
! 310: default:
! 311: goto reset;
! 312: }
! 313: return 1;
! 314: reset:
! 315: esc_index = 0;
! 316: esc_argc = 0;
! 317: return 1;
! 318: }
! 319:
! 320: static void
! 321: put_char(char c)
! 322: {
! 323:
! 324: if (check_escape(c))
! 325: return;
! 326:
! 327: switch (c) {
! 328: case '\n':
! 329: new_line();
! 330: return;
! 331: case '\r':
! 332: pos_x = 0;
! 333: return;
! 334: case '\b':
! 335: if (pos_x == 0)
! 336: return;
! 337: pos_x--;
! 338: return;
! 339: }
! 340:
! 341: vram[pos_y * cols + pos_x] = c | (attrib << 8);
! 342: pos_x++;
! 343: if (pos_x >= cols) {
! 344: pos_x = 0;
! 345: pos_y++;
! 346: if (pos_y >= rows) {
! 347: pos_y = rows - 1;
! 348: scroll_up();
! 349: }
! 350: }
! 351: }
! 352:
! 353: static void
! 354: console_output(struct tty *tp)
! 355: {
! 356: int c;
! 357:
! 358: sched_lock();
! 359: while ((c = ttyq_getc(&tp->t_outq)) >= 0)
! 360: put_char(c);
! 361: move_cursor();
! 362: esc_index = 0;
! 363: sched_unlock();
! 364: }
! 365:
! 366: /*
! 367: * Read
! 368: */
! 369: static int
! 370: console_read(device_t dev, char *buf, size_t *nbyte, int blkno)
! 371: {
! 372:
! 373: return tty_read(&console_tty, buf, nbyte);
! 374: }
! 375:
! 376: /*
! 377: * Write
! 378: */
! 379: static int
! 380: console_write(device_t dev, char *buf, size_t *nbyte, int blkno)
! 381: {
! 382:
! 383: return tty_write(&console_tty, buf, nbyte);
! 384: }
! 385:
! 386: /*
! 387: * I/O control
! 388: */
! 389: static int
! 390: console_ioctl(device_t dev, int cmd, u_long arg)
! 391: {
! 392:
! 393: return tty_ioctl(&console_tty, cmd, (void *)arg);
! 394: }
! 395:
! 396: /*
! 397: * Attach input device.
! 398: */
! 399: void
! 400: console_attach(struct tty **tpp)
! 401: {
! 402:
! 403: *tpp = &console_tty;
! 404: }
! 405:
! 406: #if defined(DEBUG) && defined(CONFIG_DIAG_SCREEN)
! 407: /*
! 408: * Diag print handler
! 409: */
! 410: static void
! 411: diag_print(char *str)
! 412: {
! 413: size_t count;
! 414: char c;
! 415:
! 416: sched_lock();
! 417: for (count = 0; count < 128; count++) {
! 418: c = *str;
! 419: if (c == '\0')
! 420: break;
! 421: put_char(c);
! 422:
! 423: #if defined(CONFIG_DIAG_BOCHS)
! 424: if (inb(0xe9) == 0xe9) {
! 425: if (c == '\n')
! 426: outb((int)'\r', 0xe9);
! 427: outb(c, 0xe9);
! 428: }
! 429: #endif
! 430: str++;
! 431: }
! 432: move_cursor();
! 433: esc_index = 0;
! 434: sched_unlock();
! 435: }
! 436: #endif
! 437:
! 438: /*
! 439: * Init
! 440: */
! 441: static int
! 442: console_init(void)
! 443: {
! 444: struct boot_info *boot_info;
! 445:
! 446: machine_bootinfo(&boot_info);
! 447: cols = boot_info->video.text_x;
! 448: rows = boot_info->video.text_y;
! 449:
! 450: esc_index = 0;
! 451: attrib = 0x0F;
! 452:
! 453: vram = phys_to_virt((void *)VID_RAM);
! 454: console_dev = device_create(&console_io, "console", DF_CHR);
! 455: reset_cursor();
! 456: #if defined(DEBUG) && defined(CONFIG_DIAG_SCREEN)
! 457: debug_attach(diag_print);
! 458: #endif
! 459: tty_register(&console_io, &console_tty, console_output);
! 460: console_tty.t_winsize.ws_row = rows;
! 461: console_tty.t_winsize.ws_col = cols;
! 462: return 0;
! 463: }