Annotation of prex-old/dev/arm/gba/console.c, Revision 1.1
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 - GBA console driver
! 32: */
! 33:
! 34: #include <driver.h>
! 35: #include <sys/tty.h>
! 36: #include "lcd.h"
! 37: #include "font.h"
! 38:
! 39: static int console_init(void);
! 40: static int console_read(device_t, char *, size_t *, int);
! 41: static int console_write(device_t, char *, size_t *, int);
! 42: static int console_ioctl(device_t, int, u_long);
! 43:
! 44: /*
! 45: * Driver structure
! 46: */
! 47: struct driver console_drv = {
! 48: /* name */ "GBA Console",
! 49: /* order */ 4,
! 50: /* init */ console_init,
! 51: };
! 52:
! 53: static struct devio console_io = {
! 54: /* open */ NULL,
! 55: /* close */ NULL,
! 56: /* read */ console_read,
! 57: /* write */ console_write,
! 58: /* ioctl */ console_ioctl,
! 59: /* event */ NULL,
! 60: };
! 61:
! 62: static device_t console_dev;
! 63: static struct tty console_tty;
! 64:
! 65: static uint16_t *vram = CONSOLE_MAP;
! 66: static int pos_x;
! 67: static int pos_y;
! 68: static u_short attrib;
! 69:
! 70: static int esc_index;
! 71: static int esc_arg1;
! 72: static int esc_arg2;
! 73: static int esc_argc;
! 74: static int esc_saved_x;
! 75: static int esc_saved_y;
! 76:
! 77: static u_short ansi_colors[] = {0, 4, 2, 6, 1, 5, 3, 7};
! 78:
! 79: static void
! 80: scroll_up(void)
! 81: {
! 82: int i;
! 83:
! 84: for (i = 0; i < VSCR_COLS * (SCR_ROWS - 1); i++)
! 85: vram[i] = vram[i + VSCR_COLS];
! 86: for (i = 0; i < VSCR_COLS; i++)
! 87: vram[VSCR_COLS * (SCR_ROWS - 1) + i] = ' ';
! 88: }
! 89:
! 90: static void
! 91: move_cursor(void)
! 92: {
! 93: }
! 94:
! 95:
! 96: static void
! 97: new_line(void)
! 98: {
! 99:
! 100: pos_x = 0;
! 101: pos_y++;
! 102: if (pos_y >= SCR_ROWS) {
! 103: pos_y = SCR_ROWS - 1;
! 104: scroll_up();
! 105: }
! 106: }
! 107:
! 108: static void
! 109: clear_screen(void)
! 110: {
! 111: int i;
! 112:
! 113: for (i = 0; i < VSCR_COLS * SCR_ROWS; i++)
! 114: vram[i] = ' ';
! 115:
! 116: pos_x = 0;
! 117: pos_y = 0;
! 118: move_cursor();
! 119: }
! 120:
! 121: /*
! 122: * Check for escape code sequence.
! 123: * Return true if escape
! 124: *
! 125: * <Support list>
! 126: * ESC[#;#H or : moves cursor to line #, column #
! 127: * ESC[#;#f
! 128: * ESC[#A : moves cursor up # lines
! 129: * ESC[#B : moves cursor down # lines
! 130: * ESC[#C : moves cursor right # spaces
! 131: * ESC[#D : moves cursor left # spaces
! 132: * ESC[#;#R : reports current cursor line & column
! 133: * ESC[s : save cursor position for recall later
! 134: * ESC[u : return to saved cursor position
! 135: * ESC[2J : clear screen and home cursor
! 136: * ESC[K : clear to end of line
! 137: *
! 138: * <Not support>
! 139: * ESC[#m : attribute (0=attribure off, 4=underline, 5=blink)
! 140: */
! 141: static int
! 142: check_escape(char c)
! 143: {
! 144: int move = 0;
! 145: int val;
! 146: u_short color;
! 147:
! 148: if (c == 033) {
! 149: esc_index = 1;
! 150: esc_argc = 0;
! 151: return 1;
! 152: }
! 153: if (esc_index == 0)
! 154: return 0;
! 155:
! 156: if (c >= '0' && c <= '9') {
! 157: val = c - '0';
! 158: switch (esc_argc) {
! 159: case 0:
! 160: esc_arg1 = val;
! 161: esc_index++;
! 162: break;
! 163: case 1:
! 164: esc_arg1 = esc_arg1 * 10 + val;
! 165: break;
! 166: case 2:
! 167: esc_arg2 = val;
! 168: esc_index++;
! 169: break;
! 170: case 3:
! 171: esc_arg2 = esc_arg2 * 10 + val;
! 172: break;
! 173: default:
! 174: goto reset;
! 175: }
! 176: esc_argc++;
! 177: return 1;
! 178: }
! 179:
! 180: esc_index++;
! 181:
! 182: switch (esc_index) {
! 183: case 2:
! 184: if (c != '[')
! 185: goto reset;
! 186: return 1;
! 187: case 3:
! 188: switch (c) {
! 189: case 's': /* Save cursor position */
! 190: esc_saved_x = pos_x;
! 191: esc_saved_y = pos_y;
! 192: break;
! 193: case 'u': /* Return to saved cursor position */
! 194: pos_x = esc_saved_x;
! 195: pos_y = esc_saved_y;
! 196: move_cursor();
! 197: break;
! 198: case 'K': /* Clear to end of line */
! 199: break;
! 200: }
! 201: goto reset;
! 202: case 4:
! 203: switch (c) {
! 204: case 'A': /* Move cursor up # lines */
! 205: pos_y -= esc_arg1;
! 206: if (pos_y < 0)
! 207: pos_y = 0;
! 208: move = 1;
! 209: break;
! 210: case 'B': /* Move cursor down # lines */
! 211: pos_y += esc_arg1;
! 212: if (pos_y >= SCR_ROWS)
! 213: pos_y = SCR_ROWS - 1;
! 214: move = 1;
! 215: break;
! 216: case 'C': /* Move cursor forward # spaces */
! 217: pos_x += esc_arg1;
! 218: if (pos_x >= SCR_COLS)
! 219: pos_x = SCR_COLS - 1;
! 220: move = 1;
! 221: break;
! 222: case 'D': /* Move cursor back # spaces */
! 223: pos_x -= esc_arg1;
! 224: if (pos_x < 0)
! 225: pos_x = 0;
! 226: move = 1;
! 227: break;
! 228: case ';':
! 229: if (esc_argc == 1)
! 230: esc_argc = 2;
! 231: return 1;
! 232: case 'J':
! 233: if (esc_arg1 == 2) /* Clear screen */
! 234: clear_screen();
! 235: break;
! 236: case 'm': /* Change attribute */
! 237: switch (esc_arg1) {
! 238: case 0: /* reset */
! 239: attrib = 0x0F;
! 240: break;
! 241: case 1: /* bold */
! 242: attrib = 0x0F;
! 243: break;
! 244: case 4: /* under line */
! 245: break;
! 246: case 5: /* blink */
! 247: attrib |= 0x80;
! 248: break;
! 249: case 30: case 31: case 32: case 33:
! 250: case 34: case 35: case 36: case 37:
! 251: color = ansi_colors[esc_arg1 - 30];
! 252: attrib = (attrib & 0xf0) | color;
! 253: break;
! 254: case 40: case 41: case 42: case 43:
! 255: case 44: case 45: case 46: case 47:
! 256: color = ansi_colors[esc_arg1 - 40];
! 257: attrib = (attrib & 0x0f) | (color << 4);
! 258: break;
! 259: }
! 260: break;
! 261:
! 262: }
! 263: if (move)
! 264: move_cursor();
! 265: goto reset;
! 266: case 6:
! 267: switch (c) {
! 268: case 'H':
! 269: case 'f':
! 270: pos_y = esc_arg1;
! 271: pos_x = esc_arg2;
! 272: if (pos_y >= SCR_ROWS)
! 273: pos_y = SCR_ROWS - 1;
! 274: if (pos_x >= SCR_COLS)
! 275: pos_x = SCR_COLS - 1;
! 276: move_cursor();
! 277: break;
! 278: case 'R':
! 279: /* XXX */
! 280: break;
! 281: }
! 282: goto reset;
! 283: default:
! 284: goto reset;
! 285: }
! 286: return 1;
! 287: reset:
! 288: esc_index = 0;
! 289: esc_argc = 0;
! 290: return 1;
! 291: }
! 292:
! 293: static void
! 294: put_char(char c)
! 295: {
! 296:
! 297: if (check_escape(c))
! 298: return;
! 299:
! 300: switch (c) {
! 301: case '\n':
! 302: new_line();
! 303: return;
! 304: case '\r':
! 305: pos_x = 0;
! 306: return;
! 307: case '\b':
! 308: if (pos_x == 0)
! 309: return;
! 310: pos_x--;
! 311: return;
! 312: }
! 313:
! 314: vram[pos_y * VSCR_COLS + pos_x] = c;
! 315: pos_x++;
! 316: if (pos_x >= SCR_COLS) {
! 317: pos_x = 0;
! 318: pos_y++;
! 319: if (pos_y >= SCR_ROWS) {
! 320: pos_y = SCR_ROWS - 1;
! 321: scroll_up();
! 322: }
! 323: }
! 324: }
! 325:
! 326: static void
! 327: console_output(struct tty *tp)
! 328: {
! 329: int c;
! 330:
! 331: sched_lock();
! 332: while ((c = ttyq_getc(&tp->t_outq)) >= 0)
! 333: put_char(c);
! 334: move_cursor();
! 335: esc_index = 0;
! 336: sched_unlock();
! 337: }
! 338:
! 339: #if defined(DEBUG) && defined(CONFIG_DIAG_VBA)
! 340: /*
! 341: * Debug print handler
! 342: */
! 343: static void
! 344: diag_print(char *str)
! 345: {
! 346: size_t count;
! 347: char c;
! 348:
! 349: sched_lock();
! 350: for (count = 0; count < 128; count++) {
! 351: c = *str;
! 352: if (c == '\0')
! 353: break;
! 354: put_char(c);
! 355: str++;
! 356: }
! 357: move_cursor();
! 358: esc_index = 0;
! 359: sched_unlock();
! 360: }
! 361: #endif
! 362:
! 363: /*
! 364: * Read
! 365: */
! 366: static int
! 367: console_read(device_t dev, char *buf, size_t *nbyte, int blkno)
! 368: {
! 369:
! 370: return tty_read(&console_tty, buf, nbyte);
! 371: }
! 372:
! 373: /*
! 374: * Write
! 375: */
! 376: static int
! 377: console_write(device_t dev, char *buf, size_t *nbyte, int blkno)
! 378: {
! 379:
! 380: return tty_write(&console_tty, buf, nbyte);
! 381: }
! 382:
! 383: /*
! 384: * I/O control
! 385: */
! 386: static int
! 387: console_ioctl(device_t dev, int cmd, u_long arg)
! 388: {
! 389:
! 390: return tty_ioctl(&console_tty, cmd, (void *)arg);
! 391: }
! 392:
! 393: /*
! 394: * Attach input device.
! 395: */
! 396: void
! 397: console_attach(struct tty **tpp)
! 398: {
! 399:
! 400: *tpp = &console_tty;
! 401: }
! 402:
! 403: /*
! 404: * Init font
! 405: */
! 406: static void
! 407: init_font(void)
! 408: {
! 409: int i, row, col, bit, val = 0;
! 410: uint16_t *tile = CONSOLE_TILE;
! 411:
! 412: for (i = 0; i < 128; i++) {
! 413: for (row = 0; row < 8; row++) {
! 414: for (col = 7; col >= 0; col--) {
! 415: bit = (font_bitmap[i][row] & (1 << col)) ? 2 : 1;
! 416: if (col % 2)
! 417: val = bit;
! 418: else
! 419: tile[(i * 32) + (row * 4) + ((7 - col) / 2)] =
! 420: val + (bit << 8);
! 421: }
! 422: }
! 423: }
! 424: }
! 425:
! 426: /*
! 427: * Init screen
! 428: */
! 429: static void
! 430: init_screen(void)
! 431: {
! 432: uint16_t *pal = BG_PALETTE;
! 433:
! 434: /* Initialize palette */
! 435: pal[0] = 0; /* Transparent */
! 436: pal[1] = RGB(0,0,0); /* Black */
! 437: pal[2] = RGB(31,31,31); /* White */
! 438:
! 439: /* Setup video */
! 440: REG_BG3CNT = 0x1080; /* Size0, 256color, priority0 */
! 441: REG_DISPCNT = 0x0800; /* Mode0, BG3 */
! 442: }
! 443:
! 444: /*
! 445: * Init
! 446: */
! 447: static int
! 448: console_init(void)
! 449: {
! 450:
! 451: esc_index = 0;
! 452: pos_x = 0;
! 453: pos_y = 19;
! 454: console_dev = device_create(&console_io, "console", DF_CHR);
! 455: init_font();
! 456: init_screen();
! 457: #if defined(DEBUG) && defined(CONFIG_DIAG_VBA)
! 458: debug_attach(diag_print);
! 459: #endif
! 460: tty_register(&console_io, &console_tty, console_output);
! 461: console_tty.t_winsize.ws_row = SCR_ROWS;
! 462: console_tty.t_winsize.ws_col = SCR_COLS;
! 463: return 0;
! 464: }
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