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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 One Laptop per Child, Association, Inc.
*
* 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; version 2 of the License.
*
* 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 <cpu/x86/mtrr.h>
#include <cpu/x86/msr.h>
#include <arch/interrupt.h>
#include <x86emu/regs.h>
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
#include <device/oprom/realmode/x86.h>
#endif
/* PCI Domain 1 Device 0 Function 0 */
#define SR_INDEX 0x3c4
#define SR_DATA 0x3c5
#define CRTM_INDEX 0x3b4
#define CRTM_DATA 0x3b5
#define CRTC_INDEX 0x3d4
#define CRTC_DATA 0x3d5
/* !!FIXME!! These were CONFIG_ options. Fix it in uma_ram_setting.c too. */
#define VIACONFIG_VGA_PCI_10 0xf8000008
#define VIACONFIG_VGA_PCI_14 0xfc000000
static int via_vx800_int15_handler(void)
{
int res = 0;
printk(BIOS_DEBUG, "via_vx800_int15_handler\n");
switch(X86_EAX & 0xffff) {
case 0x5f19:
X86_EAX = 0x5f;
X86_ECX = 0x03;
res = 1;
break;
case 0x5f18:
{
/*
* BL Bit[7:4]
* Memory Data Rate
* 0000: 66MHz
* 0001: 100MHz
* 0010: 133MHz
* 0011: 200MHz ( DDR200 )
* 0100: 266MHz ( DDR266 )
* 0101: 333MHz ( DDR333 )
* 0110: 400MHz ( DDR400 )
* 0111: 533MHz ( DDR I/II 533
* 1000: 667MHz ( DDR I/II 667)
* Bit[3:0]
* N: Frame Buffer Size 2^N MB
*/
u8 i;
device_t dev;
dev = dev_find_slot(0, PCI_DEVFN(0, 3));
i = pci_read_config8(dev, 0xa1);
i = (i & 0x70);
i = i >> 4;
if (i == 0) {
X86_EAX = 0x00; //not support 5f18
break;
}
i = i + 2;
X86_EBX = (u32) i;
i = pci_read_config8(dev, 0x90);
i = (i & 0x07);
i = i + 3;
i = i << 4;
X86_EBX = X86_EBX + ((u32) i);
X86_EAX = 0x5f;
res = 1;
break;
}
case 0x5f00:
X86_EAX = 0x005f;
res = 1;
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 = 0x005f;
res = 1;
break;
default:
printk(BIOS_DEBUG, "Unknown INT15 function %04x!\n",
X86_EAX & 0xffff);
X86_EAX = 0;
break;
}
return res;
}
#ifdef UNUSED_CODE
static void write_protect_vgabios(void)
{
device_t dev;
printk(BIOS_INFO, "write_protect_vgabios\n");
/* there are two possible devices. Just do both. */
dev = dev_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_VX855_MEMCTRL, 0);
if (dev)
pci_write_config8(dev, 0x80, 0xff);
}
#endif
static void vga_enable_console(void)
{
#if CONFIG_PCI_OPTION_ROM_RUN_REALMODE
/* Call VGA BIOS int10 function 0x4f14 to enable main console
* Epia-M does not always autosense the main console so forcing
* it on is good.
*/
/* int#, EAX, EBX, ECX, EDX, ESI, EDI */
realmode_interrupt(0x10, 0x4f14, 0x8003, 0x0001, 0x0000, 0x0000, 0x0000);
#endif
}
extern u8 acpi_sleep_type;
static void vga_init(device_t dev)
{
uint8_t reg8;
mainboard_interrupt_handlers(0x15, &via_vx800_int15_handler);
//A20 OPEN
reg8 = inb(0x92);
reg8 = reg8 | 2;
outb(reg8, 0x92);
printk(BIOS_DEBUG, "Initializing VGA...\n");
pci_dev_init(dev);
printk(BIOS_DEBUG, "Enable VGA console\n");
vga_enable_console();
if (acpi_sleep_type == 3/* || (PAYLOAD_IS_SEABIOS == 0)*/) {
/* 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 200MHz */
outb(0x3d, CRTM_INDEX);
reg8 = inb(CRTM_DATA);
reg8 &= 0x0f;
reg8 |= (0x3 << 4);
outb(0x3d, CRTM_INDEX);
outb(reg8, CRTM_DATA);
}
}
static 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_VX855_VGA,
};
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