bsp/hal/arm/gba/diag.c

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This source file includes following definitions.
screen_scroll_up
screen_newline
screen_putc
screen_init_font
screen_init_screen
diag_puts
diag_init
diag_puts
diag_init
   1 /*-
   2  * Copyright (c) 2008, 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  * diag.c - diagnostic message support
  32  */
  33 
  34 #include <sys/bootinfo.h>
  35 #include <kernel.h>
  36 #include <cpufunc.h>
  37 
  38 #ifdef CONFIG_DIAG_SCREEN
  39 
  40 #include "font.h"
  41 
  42 #define VSCR_COLS       32
  43 #define SCR_COLS        30
  44 #define SCR_ROWS        20
  45 
  46 /* Registers for keypad control */
  47 #define REG_DISPCNT     (*(volatile u_short *)0x4000000)
  48 #define REG_BG0CNT      (*(volatile u_short *)0x4000008)
  49 
  50 #define BG_PALETTE      (u_short *)0x5000000
  51 #define VRAM_TILE       (u_short *)0x6000000
  52 #define VRAM_MAP        (u_short *)0x6008000
  53 
  54 #define RGB(r, g, b)    (((b) << 10) + ((g) << 5) + (r))
  55 
  56 static u_short *vram = VRAM_MAP;
  57 static int pos_x;
  58 static int pos_y;
  59 
  60 static void
  61 screen_scroll_up(void)
  62 {
  63         int i;
  64 
  65         for (i = 0; i < VSCR_COLS * (SCR_ROWS - 1); i++)
  66                 vram[i] = vram[i + VSCR_COLS];
  67         for (i = 0; i < VSCR_COLS; i++)
  68                 vram[VSCR_COLS * (SCR_ROWS - 1) + i] = ' ';
  69 }
  70 
  71 static void
  72 screen_newline(void)
  73 {
  74 
  75         pos_x = 0;
  76         pos_y++;
  77         if (pos_y >= SCR_ROWS) {
  78                 pos_y = SCR_ROWS - 1;
  79                 screen_scroll_up();
  80         }
  81 }
  82 
  83 static void
  84 screen_putc(char c)
  85 {
  86 
  87         switch (c) {
  88         case '\n':
  89                 screen_newline();
  90                 return;
  91         case '\r':
  92                 pos_x = 0;
  93                 return;
  94         case '\b':
  95                 if (pos_x == 0)
  96                         return;
  97                 pos_x--;
  98                 return;
  99         }
 100         vram[pos_y * VSCR_COLS + pos_x] = c;
 101         pos_x++;
 102         if (pos_x >= SCR_COLS) {
 103                 pos_x = 0;
 104                 pos_y++;
 105                 if (pos_y >= SCR_ROWS) {
 106                         pos_y = SCR_ROWS - 1;
 107                         screen_scroll_up();
 108                 }
 109         }
 110 }
 111 
 112 /*
 113  * Init font
 114  */
 115 static void
 116 screen_init_font(void)
 117 {
 118         int i, row, col, bit, val = 0;
 119         u_short *tile = VRAM_TILE;
 120 
 121         for (i = 0; i < 256; i++) {
 122                 for (row = 0; row < 8; row++) {
 123                         for (col = 7; col >= 0; col--) {
 124                                 bit = (font_bitmap[i][row] &
 125                                        (1 << col)) ? 2 : 1;
 126                                 if (col % 2)
 127                                         val = bit;
 128                                 else {
 129                                         tile[(i * 32) +
 130                                              (row * 4) + ((7 - col) / 2)] =
 131                                                 val + (bit << 8);
 132                                 }
 133                         }
 134                 }
 135         }
 136 }
 137 
 138 /*
 139  * Init screen
 140  */
 141 static void
 142 screen_init_screen(void)
 143 {
 144         u_short *pal = BG_PALETTE;
 145 
 146         /* Initialize palette */
 147         pal[0] = 0;             /* Transparent */
 148         pal[1] = RGB(0,0,0);    /* Black */
 149         pal[2] = RGB(31,31,31); /* White */
 150 
 151         /* Setup video */
 152         REG_DISPCNT = 0x0100;   /* Mode0, BG0 */
 153         REG_BG0CNT = 0x1080;    /* Size0, 256color */
 154 }
 155 
 156 void
 157 diag_puts(char *buf)
 158 {
 159 
 160         while (*buf)
 161                 screen_putc(*buf++);
 162 }
 163 
 164 /*
 165  * Init
 166  */
 167 void
 168 diag_init(void)
 169 {
 170 
 171         screen_init_font();
 172         screen_init_screen();
 173 }
 174 
 175 #endif  /* !CONFIG_DIAG_SCREEN */
 176 
 177 
 178 #ifdef CONFIG_DIAG_VBA
 179 extern void vba_puts(char *);
 180 
 181 void
 182 diag_puts(char *str)
 183 {
 184 
 185         vba_puts(str);
 186 }
 187 
 188 /*
 189  * Init
 190  */
 191 void
 192 diag_init(void)
 193 {
 194 
 195 }
 196 #endif  /* !CONFIG_DIAG_VBA */
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root/bsp/hal/arm/gba/diag.c

DEFINITIONS
