2 * This file is part of the coreboot project.
4 * Copyright (C) 2007-2009 coresystems GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <console/console.h>
23 #include <device/device.h>
24 #include <device/pci.h>
25 #include <device/pci_ids.h>
30 #include <cpu/x86/mtrr.h>
31 #include <cpu/x86/msr.h>
33 #include "northbridge.h"
35 /* PCI Domain 1 Device 0 Function 0 */
37 #define SR_INDEX 0x3c4
39 #define CRTM_INDEX 0x3b4
40 #define CRTM_DATA 0x3b5
41 #define CRTC_INDEX 0x3d4
42 #define CRTC_DATA 0x3d5
44 void setup_realmode_idt(void);
45 void do_vgabios(void);
46 void vga_enable_console(void);
48 void write_protect_vgabios(void)
52 printk(BIOS_DEBUG, "write_protect_vgabios\n");
54 dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3324, 0);
56 pci_write_config8(dev, 0x80, 0xff);
58 dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x7324, 0);
60 pci_write_config8(dev, 0x61, 0xff);
63 static void vga_init(device_t dev)
67 printk(BIOS_DEBUG, "Initializing VGA...\n");
70 pci_write_config8(dev, 0x04, 0x07);
71 pci_write_config8(dev, 0x3e, 0x02);
72 pci_write_config8(dev, 0x0d, 0x40);
73 pci_write_config32(dev, 0x10, 0xa0000008);
74 pci_write_config32(dev, 0x14, 0xdd000000);
75 pci_write_config8(dev, 0x3c, 0x0b);
78 printk(BIOS_DEBUG, "Executing VGA option rom in real mode\n");
81 printk(BIOS_DEBUG, "Enable VGA console\n");
84 /* It's not clear if these need to be programmed before or after
85 * the VGA bios runs. Try both, clean up later */
86 /* Set memory rate to 200MHz */
87 outb(0x3d, CRTM_INDEX);
88 reg8 = inb(CRTM_DATA);
91 outb(0x3d, CRTM_INDEX);
92 outb(reg8, CRTM_DATA);
94 /* Set framebuffer size to 32mb */
100 static struct device_operations vga_operations = {
101 .read_resources = pci_dev_read_resources,
102 .set_resources = pci_dev_set_resources,
103 .enable_resources = pci_dev_enable_resources,
108 static const struct pci_driver vga_driver __pci_driver = {
109 .ops = &vga_operations,
110 .vendor = PCI_VENDOR_ID_VIA,