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/*
* Copyright (c) 2008 Martin Decky
* Copyright (c) 2006 Ondrej Palkovsky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup genarch
* @{
*/
/** @file
*/
#include <genarch/fb/font-8x16.h>
#include <genarch/fb/logo-196x66.h>
#include <genarch/fb/visuals.h>
#include <genarch/fb/fb.h>
#include <console/chardev.h>
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <mm/slab.h>
#include <align.h>
#include <panic.h>
#include <memstr.h>
#include <config.h>
#include <bitops.h>
#include <print.h>
#include <ddi/ddi.h>
#include <arch/types.h>
SPINLOCK_INITIALIZE(fb_lock);
static uint8_t *fb_addr;
static uint8_t *backbuf;
static uint8_t *glyphs;
static uint8_t *bgscan;
static unsigned int xres;
static unsigned int yres;
static unsigned int ylogo;
static unsigned int ytrim;
static unsigned int rowtrim;
static unsigned int scanline;
static unsigned int glyphscanline;
static unsigned int pixelbytes;
static unsigned int glyphbytes;
static unsigned int bgscanbytes;
static unsigned int cols;
static unsigned int rows;
static unsigned int position = 0;
#define BG_COLOR 0x000080
#define FG_COLOR 0xffff00
#define CURSOR 219
#define RED(x, bits) ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
#define GREEN(x, bits) ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
#define BLUE(x, bits) ((x >> (8 - bits)) & ((1 << bits) - 1))
#define COL2X(col) ((col) * FONT_WIDTH)
#define ROW2Y(row) ((row) * FONT_SCANLINES)
#define X2COL(x) ((x) / FONT_WIDTH)
#define Y2ROW(y) ((y) / FONT_SCANLINES)
#define FB_POS(x, y) ((y) * scanline + (x) * pixelbytes)
#define BB_POS(col, row) ((row) * cols + (col))
#define GLYPH_POS(glyph, y) ((glyph) * glyphbytes + (y) * glyphscanline)
static void (*rgb_conv)(void *, uint32_t);
/** ARGB 8:8:8:8 conversion
*
*/
static void rgb_0888(void *dst, uint32_t rgb)
{
*((uint32_t *) dst) = rgb & 0xffffff;
}
/** ABGR 8:8:8:8 conversion
*
*/
static void bgr_0888(void *dst, uint32_t rgb)
{
*((uint32_t *) dst)
= (BLUE(rgb, 8) << 16) | (GREEN(rgb, 8) << 8) | RED(rgb, 8);
}
/** RGB 8:8:8 conversion
*
*/
static void rgb_888(void *dst, uint32_t rgb)
{
((uint8_t *) dst)[0] = BLUE(rgb, 8);
((uint8_t *) dst)[1] = GREEN(rgb, 8);
((uint8_t *) dst)[2] = RED(rgb, 8);
}
/** BGR 8:8:8 conversion
*
*/
static void bgr_888(void *dst, uint32_t rgb)
{
((uint8_t *) dst)[0] = RED(rgb, 8);
((uint8_t *) dst)[1] = GREEN(rgb, 8);
((uint8_t *) dst)[2] = BLUE(rgb, 8);
}
/** RGB 5:5:5 conversion
*
*/
static void rgb_555(void *dst, uint32_t rgb)
{
*((uint16_t *) dst)
= (RED(rgb, 5) << 10) | (GREEN(rgb, 5) << 5) | BLUE(rgb, 5);
}
/** RGB 5:6:5 conversion
*
*/
static void rgb_565(void *dst, uint32_t rgb)
{
*((uint16_t *) dst)
= (RED(rgb, 5) << 11) | (GREEN(rgb, 6) << 5) | BLUE(rgb, 5);
}
/** RGB 3:2:3
*
* Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
* will most likely use a color palette. The color appearance
* will be pretty random and depend on the default installed
* palette. This could be fixed by supporting custom palette
* and setting it to simulate the 8-bit truecolor.
*
* Currently we set the palette on the ia32, amd64 and sparc64 port.
*
* Note that the byte is being inverted by this function. The reason is
* that we would like to use a color palette where the white color code
* is 0 and the black color code is 255, as some machines (Sun Blade 1500)
* use these codes for black and white and prevent to set codes
* 0 and 255 to other colors.
*
*/
static void rgb_323(void *dst, uint32_t rgb)
{
*((uint8_t *) dst)
= ~((RED(rgb, 3) << 5) | (GREEN(rgb, 2) << 3) | BLUE(rgb, 3));
}
/** Hide logo and refresh screen
*
*/
static void logo_hide(bool silent)
{
ylogo = 0;
ytrim = yres;
rowtrim = rows;
if (!silent)
fb_redraw();
}
/** Draw character at given position
*
*/
static void glyph_draw(uint8_t glyph, unsigned int col, unsigned int row, bool silent)
{
unsigned int x = COL2X(col);
unsigned int y = ROW2Y(row);
unsigned int yd;
if (y >= ytrim)
logo_hide(silent);
backbuf[BB_POS(col, row)] = glyph;
if (!silent) {
for (yd = 0; yd < FONT_SCANLINES; yd++)
memcpy(&fb_addr[FB_POS(x, y + yd + ylogo)],
&glyphs[GLYPH_POS(glyph, yd)], glyphscanline);
}
}
/** Scroll screen down by one row
*
*
*/
static void screen_scroll(bool silent)
{
if (ylogo > 0) {
logo_hide(silent);
return;
}
if (!silent) {
unsigned int row;
for (row = 0; row < rows; row++) {
unsigned int y = ROW2Y(row);
unsigned int yd;
for (yd = 0; yd < FONT_SCANLINES; yd++) {
unsigned int x;
unsigned int col;
for (col = 0, x = 0; col < cols; col++,
x += FONT_WIDTH) {
uint8_t glyph;
if (row < rows - 1) {
if (backbuf[BB_POS(col, row)] ==
backbuf[BB_POS(col, row + 1)])
continue;
glyph = backbuf[BB_POS(col, row + 1)];
} else
glyph = 0;
memcpy(&fb_addr[FB_POS(x, y + yd)],
&glyphs[GLYPH_POS(glyph, yd)],
glyphscanline);
}
}
}
}
memmove(backbuf, backbuf + cols, cols * (rows - 1));
memsetb(&backbuf[BB_POS(0, rows - 1)], cols, 0);
}
static void cursor_put(bool silent)
{
glyph_draw(CURSOR, position % cols, position / cols, silent);
}
static void cursor_remove(bool silent)
{
glyph_draw(0, position % cols, position / cols, silent);
}
/** Print character to screen
*
* Emulate basic terminal commands.
*
*/
static void fb_putchar(chardev_t *dev, char ch, bool silent)
{
spinlock_lock(&fb_lock);
switch (ch) {
case '\n':
cursor_remove(silent);
position += cols;
position -= position % cols;
break;
case '\r':
cursor_remove(silent);
position -= position % cols;
break;
case '\b':
cursor_remove(silent);
if (position % cols)
position--;
break;
case '\t':
cursor_remove(silent);
do {
glyph_draw((uint8_t) ' ', position % cols,
position / cols, silent);
position++;
} while ((position % 8) && (position < cols * rows));
break;
default:
glyph_draw((uint8_t) ch, position % cols,
position / cols, silent);
position++;
}
if (position >= cols * rows) {
position -= cols;
screen_scroll(silent);
}
cursor_put(silent);
spinlock_unlock(&fb_lock);
}
static chardev_t framebuffer;
static chardev_operations_t fb_ops = {
.write = fb_putchar,
};
/** Render glyphs
*
* Convert glyphs from device independent font
* description to current visual representation.
*
*/
static void glyphs_render(void)
{
/* Prerender glyphs */
unsigned int glyph;
for (glyph = 0; glyph < FONT_GLYPHS; glyph++) {
unsigned int y;
for (y = 0; y < FONT_SCANLINES; y++) {
unsigned int x;
for (x = 0; x < FONT_WIDTH; x++) {
void *dst = &glyphs[GLYPH_POS(glyph, y) +
x * pixelbytes];
uint32_t rgb = (fb_font[ROW2Y(glyph) + y] &
(1 << (7 - x))) ? FG_COLOR : BG_COLOR;
rgb_conv(dst, rgb);
}
}
}
/* Prerender background scanline */
unsigned int x;
for (x = 0; x < xres; x++)
rgb_conv(&bgscan[x * pixelbytes], BG_COLOR);
}
/** Refresh the screen
*
*/
void fb_redraw(void)
{
if (ylogo > 0) {
unsigned int y;
for (y = 0; y < LOGO_HEIGHT; y++) {
unsigned int x;
for (x = 0; x < xres; x++)
rgb_conv(&fb_addr[FB_POS(x, y)],
(x < LOGO_WIDTH) ?
fb_logo[y * LOGO_WIDTH + x] :
LOGO_COLOR);
}
}
unsigned int row;
for (row = 0; row < rowtrim; row++) {
unsigned int y = ylogo + ROW2Y(row);
unsigned int yd;
for (yd = 0; yd < FONT_SCANLINES; yd++) {
unsigned int x;
unsigned int col;
for (col = 0, x = 0; col < cols;
col++, x += FONT_WIDTH) {
void *d = &fb_addr[FB_POS(x, y + yd)];
void *s = &glyphs[GLYPH_POS(backbuf[BB_POS(col,
row)], yd)];
memcpy(d, s, glyphscanline);
}
}
}
if (COL2X(cols) < xres) {
unsigned int y;
unsigned int size = (xres - COL2X(cols)) * pixelbytes;
for (y = ylogo; y < yres; y++)
memcpy(&fb_addr[FB_POS(COL2X(cols), y)], bgscan, size);
}
if (ROW2Y(rowtrim) + ylogo < yres) {
unsigned int y;
for (y = ROW2Y(rowtrim) + ylogo; y < yres; y++)
memcpy(&fb_addr[FB_POS(0, y)], bgscan, bgscanbytes);
}
}
/** Initialize framebuffer as a chardev output device
*
* @param addr Physical address of the framebuffer
* @param x Screen width in pixels
* @param y Screen height in pixels
* @param scan Bytes per one scanline
* @param visual Color model
*
*/
void fb_init(fb_properties_t *props)
{
switch (props->visual) {
case VISUAL_INDIRECT_8:
rgb_conv = rgb_323;
pixelbytes = 1;
break;
case VISUAL_RGB_5_5_5:
rgb_conv = rgb_555;
pixelbytes = 2;
break;
case VISUAL_RGB_5_6_5:
rgb_conv = rgb_565;
pixelbytes = 2;
break;
case VISUAL_RGB_8_8_8:
rgb_conv = rgb_888;
pixelbytes = 3;
break;
case VISUAL_BGR_8_8_8:
rgb_conv = bgr_888;
pixelbytes = 3;
break;
case VISUAL_RGB_8_8_8_0:
rgb_conv = rgb_888;
pixelbytes = 4;
break;
case VISUAL_RGB_0_8_8_8:
rgb_conv = rgb_0888;
pixelbytes = 4;
break;
case VISUAL_BGR_0_8_8_8:
rgb_conv = bgr_0888;
pixelbytes = 4;
break;
default:
panic("Unsupported visual.");
}
xres = props->x;
yres = props->y;
scanline = props->scan;
cols = X2COL(xres);
rows = Y2ROW(yres);
if (yres > ylogo) {
ylogo = LOGO_HEIGHT;
rowtrim = rows - Y2ROW(ylogo);
if (ylogo % FONT_SCANLINES > 0)
rowtrim--;
ytrim = ROW2Y(rowtrim);
} else {
ylogo = 0;
ytrim = yres;
rowtrim = rows;
}
glyphscanline = FONT_WIDTH * pixelbytes;
glyphbytes = ROW2Y(glyphscanline);
bgscanbytes = xres * pixelbytes;
unsigned int fbsize = scanline * yres;
unsigned int bbsize = cols * rows;
unsigned int glyphsize = FONT_GLYPHS * glyphbytes;
backbuf = (uint8_t *) malloc(bbsize, 0);
if (!backbuf)
panic("Unable to allocate backbuffer.");
glyphs = (uint8_t *) malloc(glyphsize, 0);
if (!glyphs)
panic("Unable to allocate glyphs.");
bgscan = malloc(bgscanbytes, 0);
if (!bgscan)
panic("Unable to allocate background pixel.");
memsetb(backbuf, bbsize, 0);
glyphs_render();
fb_addr = (uint8_t *) hw_map((uintptr_t) props->addr, fbsize);
sysinfo_set_item_val("fb", NULL, true);
sysinfo_set_item_val("fb.kind", NULL, 1);
sysinfo_set_item_val("fb.width", NULL, xres);
sysinfo_set_item_val("fb.height", NULL, yres);
sysinfo_set_item_val("fb.scanline", NULL, scanline);
sysinfo_set_item_val("fb.visual", NULL, props->visual);
sysinfo_set_item_val("fb.address.physical", NULL, props->addr);
fb_redraw();
chardev_initialize("fb", &framebuffer, &fb_ops);
stdout = &framebuffer;
}
/** @}
*/