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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
/*
* Note: Some of the VGA control registers are located on the memory
* controller. Registers are set both in raminit.c and northbridge.c.
*/
#include <console/console.h>
#include <arch/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <bitops.h>
#include <cpu/cpu.h>
#include "chip.h"
#include "northbridge.h"
#include "cn700.h"
#include "vgachip.h"
void write_protect_vgabios(void)
{
/* Don't bother for now. */
}
static void vga_init(device_t dev)
{
u8 reg8;
print_debug("Copying BOCHS BIOS to 0xf000\n");
/*
* Copy BOCHS BIOS from 4G-CONFIG_ROM_SIZE-64k (in flash) to 0xf0000 (in RAM)
* This is for compatibility with the VGA ROM's BIOS callbacks.
*/
memcpy(0xf0000, (0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000);
printk_debug("Initializing VGA\n");
/* Set memory rate to 200 MHz. */
outb(0x3d, CRTM_INDEX);
reg8 = inb(CRTM_DATA);
reg8 &= 0x0f;
reg8 |= (0x1 << 4);
outb(0x3d, CRTM_INDEX);
outb(reg8, CRTM_DATA);
/* Set framebuffer size. */
reg8 = (CONFIG_VIDEO_MB / 4);
outb(0x39, SR_INDEX);
outb(reg8, SR_DATA);
pci_write_config8(dev, 0x04, 0x07);
pci_write_config8(dev, 0x0d, 0x20);
pci_write_config32(dev, 0x10, 0xf4000008);
pci_write_config32(dev, 0x14, 0xfb000000);
printk_debug("INSTALL REAL-MODE IDT\n");
setup_realmode_idt();
printk_debug("DO THE VGA BIOS\n");
do_vgabios();
/* VGA seems to work without this, but crash & burn with it. */
// printk_debug("Enable VGA console\n");
// vga_enable_console();
/* It's not clear if these need to be programmed before or after
* the VGA BIOS runs. Try both, clean up later. */
/* Set memory rate to 200 MHz (again). */
outb(0x3d, CRTM_INDEX);
reg8 = inb(CRTM_DATA);
reg8 &= 0x0f;
reg8 |= (0x1 << 4);
outb(0x3d, CRTM_INDEX);
outb(reg8, CRTM_DATA);
/* Set framebuffer size (again). */
reg8 = (CONFIG_VIDEO_MB / 4);
outb(0x39, SR_INDEX);
outb(reg8, SR_DATA);
/* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */
memset(0xf0000, 0, 0x10000);
}
static const struct device_operations vga_operations = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = vga_init,
.ops_pci = 0,
};
static const struct pci_driver vga_driver __pci_driver = {
.ops = &vga_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_CN700_VGA,
};
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