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/*
* Copyright (c) 2004-2005 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#include "openbios/config.h"
#include "openbios/kernel.h"
#include "openbios/bindings.h"
#include "openbios/pci.h"
#include "openbios/drivers.h"
#include "openbios/fontdata.h"
#include "asm/io.h"
#include "libc/vsprintf.h"
#include "video_subr.h"
/* VGA init. We use the Bochs VESA VBE extensions */
#define VBE_DISPI_INDEX_ID 0x0
#define VBE_DISPI_INDEX_XRES 0x1
#define VBE_DISPI_INDEX_YRES 0x2
#define VBE_DISPI_INDEX_BPP 0x3
#define VBE_DISPI_INDEX_ENABLE 0x4
#define VBE_DISPI_INDEX_BANK 0x5
#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
#define VBE_DISPI_INDEX_X_OFFSET 0x8
#define VBE_DISPI_INDEX_Y_OFFSET 0x9
#define VBE_DISPI_INDEX_NB 0xa
#define VBE_DISPI_ID0 0xB0C0
#define VBE_DISPI_ID1 0xB0C1
#define VBE_DISPI_ID2 0xB0C2
#define VBE_DISPI_DISABLED 0x00
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_LFB_ENABLED 0x40
#define VBE_DISPI_NOCLEARMEM 0x80
static void vbe_outw(int index, int val)
{
outw(index, 0x1ce);
outw(val, 0x1d0);
}
/* for depth = 8 mode, set a hardware palette entry */
void vga_set_color(int i, unsigned int r, unsigned int g, unsigned int b)
{
r &= 0xff;
g &= 0xff;
b &= 0xff;
outb(i, 0x3c8);
outb(r >> 2, 0x3c9);
outb(g >> 2, 0x3c9);
outb(b >> 2, 0x3c9);
}
/* build standard RGB palette */
static void vga_build_rgb_palette(void)
{
static const uint8_t pal_value[6] = { 0x00, 0x33, 0x66, 0x99, 0xcc, 0xff };
int i, r, g, b;
i = 0;
for(r = 0; r < 6; r++) {
for(g = 0; g < 6; g++) {
for(b = 0; b < 6; b++) {
vga_set_color(i, pal_value[r], pal_value[g], pal_value[b]);
i++;
}
}
}
}
/* depth = 8, 15, 16 or 32 */
void vga_vbe_set_mode(int width, int height, int depth)
{
outb(0x00, 0x3c0); /* enable blanking */
vbe_outw(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
vbe_outw(VBE_DISPI_INDEX_X_OFFSET, 0);
vbe_outw(VBE_DISPI_INDEX_Y_OFFSET, 0);
vbe_outw(VBE_DISPI_INDEX_XRES, width);
vbe_outw(VBE_DISPI_INDEX_YRES, height);
vbe_outw(VBE_DISPI_INDEX_BPP, depth);
vbe_outw(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED);
outb(0x00, 0x3c0);
outb(0x20, 0x3c0); /* disable blanking */
if (depth == 8)
vga_build_rgb_palette();
}
#ifdef CONFIG_VGA_WIDTH
#define VGA_DEFAULT_WIDTH CONFIG_VGA_WIDTH
#else
#define VGA_DEFAULT_WIDTH 800
#endif
#ifdef CONFIG_VGA_HEIGHT
#define VGA_DEFAULT_HEIGHT CONFIG_VGA_HEIGHT
#else
#define VGA_DEFAULT_HEIGHT 600
#endif
#ifdef CONFIG_VGA_DEPTH
#define VGA_DEFAULT_DEPTH CONFIG_VGA_DEPTH
#else
#define VGA_DEFAULT_DEPTH 8
#endif
#define VGA_DEFAULT_LINEBYTES (VGA_DEFAULT_WIDTH*((VGA_DEFAULT_DEPTH+7)/8))
void vga_vbe_init(const char *path, unsigned long fb, uint32_t fb_size,
unsigned long rom, uint32_t rom_size)
{
phandle_t ph, chosen, aliases, options;
char buf[6];
int width = VGA_DEFAULT_WIDTH;
int height = VGA_DEFAULT_HEIGHT;
int depth = VGA_DEFAULT_DEPTH;
int linebytes = VGA_DEFAULT_LINEBYTES;
#if defined(CONFIG_QEMU) && (defined(CONFIG_PPC) || defined(CONFIG_SPARC64))
int w, h, d;
w = fw_cfg_read_i16(FW_CFG_ARCH_WIDTH);
h = fw_cfg_read_i16(FW_CFG_ARCH_HEIGHT);
d = fw_cfg_read_i16(FW_CFG_ARCH_DEPTH);
if (w && h && d) {
width = w;
height = h;
depth = d;
linebytes = (width * ((depth + 7) / 8));
}
#endif
vga_vbe_set_mode(width, height, depth);
ph = find_dev(path);
set_int_property(ph, "width", width);
set_int_property(ph, "height", height);
set_int_property(ph, "depth", depth);
set_int_property(ph, "linebytes", linebytes);
set_int_property(ph, "address", fb & ~0x0000000F);
chosen = find_dev("/chosen");
push_str(path);
fword("open-dev");
set_int_property(chosen, "display", POP());
aliases = find_dev("/aliases");
set_property(aliases, "screen", path, strlen(path) + 1);
options = find_dev("/options");
snprintf(buf, sizeof(buf), "%d", width / FONT_WIDTH);
set_property(options, "screen-#columns", buf, strlen(buf) + 1);
snprintf(buf, sizeof(buf), "%d", height / FONT_HEIGHT);
set_property(options, "screen-#rows", buf, strlen(buf) + 1);
if (rom_size >= 8) {
const char *p;
int size;
p = (const char *)rom;
if (p[0] == 'N' && p[1] == 'D' && p[2] == 'R' && p[3] == 'V') {
size = *(uint32_t*)(p + 4);
set_property(ph, "driver,AAPL,MacOS,PowerPC",
p + 8, size);
}
}
init_video(fb, width, height, depth, linebytes);
}
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