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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.
*/
/*
* 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 <cpu/cpu.h>
#include <arch/interrupt.h>
#include "northbridge.h"
#include "cn700.h"
#include <x86emu/regs.h>
static int via_cn700_int15_handler(void)
{
int res = 0;
printk(BIOS_DEBUG, "via_cn700_int15_handler\n");
switch(X86_EAX & 0xffff) {
case 0x5f19:
break;
case 0x5f18:
X86_EAX = 0x5f;
X86_EBX = 0x545; // MCLK = 133, 32M frame buffer, 256 M main memory
X86_ECX = 0x060;
res = 1;
break;
case 0x5f00:
X86_EAX = 0x8600;
break;
case 0x5f01:
X86_EAX = 0x5f;
X86_ECX = (X86_ECX & 0xffffff00 ) | 2; // panel type = 2 = 1024 * 768
res = 1;
break;
case 0x5f02:
X86_EAX = 0x5f;
X86_EBX = (X86_EBX & 0xffff0000) | 2;
X86_ECX = (X86_ECX & 0xffff0000) | 0x401; // PAL + crt only
X86_EDX = (X86_EDX & 0xffff0000) | 0; // TV Layout - default
res = 1;
break;
case 0x5f0f:
X86_EAX = 0x860f;
break;
default:
printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
X86_EAX & 0xffff);
break;
}
return res;
}
static void vga_init(device_t dev)
{
u8 reg8;
mainboard_interrupt_handlers(0x15, &via_cn700_int15_handler);
#undef OLD_BOCHS_METHOD
#ifdef OLD_BOCHS_METHOD
printk(BIOS_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((void *)0xf0000, (const void *)(0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000);
#endif
/* 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(BIOS_DEBUG, "Initializing VGA...\n");
pci_dev_init(dev);
/* 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);
#ifdef OLD_BOCHS_METHOD
/* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */
memset((void *)0xf0000, 0, 0x10000);
#endif
}
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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