scoutos / prex-0.9.0 / bsp / hal / arm / gba / diag.c @ 03e9c04a
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/*-
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* Copyright (c) 2008, Kohsuke Ohtani
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* diag.c - diagnostic message support
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*/
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#include <sys/bootinfo.h> |
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#include <kernel.h> |
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#include <cpufunc.h> |
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#ifdef CONFIG_DIAG_SCREEN
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#include "font.h" |
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#define VSCR_COLS 32 |
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#define SCR_COLS 30 |
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#define SCR_ROWS 20 |
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/* Registers for keypad control */
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#define REG_DISPCNT (*(volatile u_short *)0x4000000) |
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#define REG_BG0CNT (*(volatile u_short *)0x4000008) |
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#define BG_PALETTE (u_short *)0x5000000 |
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#define VRAM_TILE (u_short *)0x6000000 |
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#define VRAM_MAP (u_short *)0x6008000 |
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#define RGB(r, g, b) (((b) << 10) + ((g) << 5) + (r)) |
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static u_short *vram = VRAM_MAP;
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static int pos_x; |
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static int pos_y; |
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static void |
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screen_scroll_up(void)
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{ |
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int i;
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for (i = 0; i < VSCR_COLS * (SCR_ROWS - 1); i++) |
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vram[i] = vram[i + VSCR_COLS]; |
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for (i = 0; i < VSCR_COLS; i++) |
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vram[VSCR_COLS * (SCR_ROWS - 1) + i] = ' '; |
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} |
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static void |
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screen_newline(void)
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{ |
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pos_x = 0;
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pos_y++; |
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if (pos_y >= SCR_ROWS) {
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pos_y = SCR_ROWS - 1;
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screen_scroll_up(); |
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} |
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} |
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static void |
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screen_putc(char c)
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{ |
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switch (c) {
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case '\n': |
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screen_newline(); |
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return;
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case '\r': |
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pos_x = 0;
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return;
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case '\b': |
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if (pos_x == 0) |
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return;
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pos_x--; |
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return;
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} |
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vram[pos_y * VSCR_COLS + pos_x] = c; |
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pos_x++; |
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if (pos_x >= SCR_COLS) {
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pos_x = 0;
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pos_y++; |
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if (pos_y >= SCR_ROWS) {
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pos_y = SCR_ROWS - 1;
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screen_scroll_up(); |
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} |
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} |
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} |
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/*
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* Init font
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*/
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static void |
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screen_init_font(void)
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{ |
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int i, row, col, bit, val = 0; |
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u_short *tile = VRAM_TILE; |
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for (i = 0; i < 256; i++) { |
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for (row = 0; row < 8; row++) { |
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for (col = 7; col >= 0; col--) { |
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bit = (font_bitmap[i][row] & |
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(1 << col)) ? 2 : 1; |
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if (col % 2) |
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val = bit; |
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else {
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tile[(i * 32) +
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(row * 4) + ((7 - col) / 2)] = |
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val + (bit << 8);
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} |
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} |
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} |
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} |
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} |
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/*
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* Init screen
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*/
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static void |
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screen_init_screen(void)
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{ |
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u_short *pal = BG_PALETTE; |
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/* Initialize palette */
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pal[0] = 0; /* Transparent */ |
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pal[1] = RGB(0,0,0); /* Black */ |
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pal[2] = RGB(31,31,31); /* White */ |
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/* Setup video */
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REG_DISPCNT = 0x0100; /* Mode0, BG0 */ |
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REG_BG0CNT = 0x1080; /* Size0, 256color */ |
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} |
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void
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diag_puts(char *buf)
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{ |
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while (*buf)
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screen_putc(*buf++); |
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} |
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/*
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* Init
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*/
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void
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diag_init(void)
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{ |
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screen_init_font(); |
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screen_init_screen(); |
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} |
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#endif /* !CONFIG_DIAG_SCREEN */ |
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#ifdef CONFIG_DIAG_VBA
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extern void vba_puts(char *); |
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void
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diag_puts(char *str)
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{ |
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vba_puts(str); |
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} |
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/*
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* Init
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*/
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void
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diag_init(void)
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{ |
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} |
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#endif /* !CONFIG_DIAG_VBA */ |