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root/bsp/drv/arm/gba/lcd.c/* [<][>][^][v][top][bottom][index][help] */DEFINITIONSThis source file includes following definitions.
1 /*- 2 * Copyright (c) 2005-2009, 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 * lcd.c - GBA LCD video driver 32 */ 33 34 #include <driver.h> 35 #include <wscons.h> 36 #include "lcd.h" 37 #include "font.h" 38 39 /* #define DEBUG_LCD 1 */ 40 41 #ifdef DEBUG_LCD 42 #define DPRINTF(a) printf a 43 #else 44 #define DPRINTF(a) 45 #endif 46 47 struct lcd_softc { 48 device_t dev; 49 uint16_t *vram; 50 }; 51 52 static int lcd_init(struct driver *); 53 static void lcd_cursor(void*, int, int); 54 static void lcd_putc(void *, int, int, int); 55 static void lcd_copyrows(void *,int, int, int); 56 static void lcd_eraserows(void *,int, int); 57 static void lcd_set_attr(void *, int); 58 static void lcd_get_cursor(void *, int *, int *); 59 60 static struct devops lcd_devops = { 61 /* open */ no_open, 62 /* close */ no_close, 63 /* read */ no_read, 64 /* write */ no_write, 65 /* ioctl */ no_ioctl, 66 /* devctl */ no_devctl, 67 }; 68 69 struct driver lcd_driver = { 70 /* name */ "lcd", 71 /* devops */ &lcd_devops, 72 /* devsz */ sizeof(struct lcd_softc), 73 /* flags */ 0, 74 /* probe */ NULL, 75 /* init */ lcd_init, 76 /* shutdown */ NULL, 77 }; 78 79 static struct wscons_video_ops wscons_lcd_ops = { 80 lcd_cursor, /* cursor */ 81 lcd_putc, /* putc */ 82 lcd_copyrows, /* copyrows */ 83 lcd_eraserows, /* eraserows */ 84 lcd_set_attr, /* set_attr */ 85 lcd_get_cursor, /* get_cursor */ 86 }; 87 88 static void 89 lcd_cursor(void *aux, int row, int col) 90 { 91 92 /* DO NOTHING */ 93 } 94 95 static void 96 lcd_putc(void *aux, int row, int col, int ch) 97 { 98 struct lcd_softc *sc = aux; 99 100 sc->vram[row * VSCR_COLS + col] = ch; 101 } 102 103 static void 104 lcd_copyrows(void *aux, int srcrow, int dstrow, int nrows) 105 { 106 struct lcd_softc *sc = aux; 107 int i; 108 109 for (i = 0; i < nrows * VSCR_COLS; i++) { 110 sc->vram[dstrow * VSCR_COLS + i] = 111 sc->vram[srcrow * VSCR_COLS + i]; 112 } 113 } 114 115 static void 116 lcd_eraserows(void *aux, int row, int nrows) 117 { 118 struct lcd_softc *sc = aux; 119 int i, start, end; 120 121 start = row * VSCR_COLS; 122 end = start + nrows * VSCR_COLS; 123 124 for (i = start; i < end; i++) 125 sc->vram[i] = ' '; 126 } 127 128 static void 129 lcd_set_attr(void *aux, int attr) 130 { 131 132 /* DO NOTHING */ 133 } 134 135 static void 136 lcd_get_cursor(void *aux, int *col, int *row) 137 { 138 139 *col = 0; 140 *row = 0; 141 } 142 143 static void 144 lcd_init_font(void) 145 { 146 int i, row, col, bit, val = 0; 147 uint16_t *tile = CONSOLE_TILE; 148 149 for (i = 0; i < 128; i++) { 150 for (row = 0; row < 8; row++) { 151 for (col = 7; col >= 0; col--) { 152 bit = (font_bitmap[i][row] & (1 << col)) ? 2 : 1; 153 if (col % 2) 154 val = bit; 155 else 156 tile[(i * 32) + (row * 4) + ((7 - col) / 2)] = 157 val + (bit << 8); 158 } 159 } 160 } 161 } 162 163 static void 164 lcd_init_screen(void) 165 { 166 uint16_t *pal = BG_PALETTE; 167 168 /* Initialize palette */ 169 pal[0] = 0; /* Transparent */ 170 pal[1] = RGB(0,0,0); /* Black */ 171 pal[2] = RGB(31,31,31); /* White */ 172 173 /* Setup lcd */ 174 REG_BG3CNT = 0x1080; /* Size0, 256color, priority0 */ 175 REG_DISPCNT = 0x0800; /* Mode0, BG3 */ 176 } 177 178 static int 179 lcd_init(struct driver *self) 180 { 181 device_t dev; 182 struct lcd_softc *sc; 183 184 dev = device_create(self, "lcd", D_CHR|D_TTY); 185 186 sc = device_private(dev); 187 sc->vram = CONSOLE_MAP; 188 189 lcd_init_font(); 190 lcd_init_screen(); 191 192 wscons_attach_video(&wscons_lcd_ops, sc); 193 return 0; 194 } /* [<][>][^][v][top][bottom][index][help] */ | |||
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Copyright© 2005-2009 Kohsuke Ohtani |
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