2 * This file is part of the coreboot project.
4 * Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
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; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * Note: Some of the VGA control registers are located on the memory
23 * controller. Registers are set both in raminit.c and northbridge.c.
26 #include <console/console.h>
29 #include <device/device.h>
30 #include <device/pci.h>
31 #include <device/pci_ids.h>
37 #include "northbridge.h"
41 void write_protect_vgabios(void)
43 /* Don't bother for now. */
46 static void vga_init(device_t dev)
54 temp = (0xffffffff - CONFIG_FALLBACK_SIZE - 0xffff);
55 printk(BIOS_DEBUG, "Copying BOCHS BIOS from 0x%08X to 0xf000\n", temp);
57 * Copy BOCHS BIOS from 4G-CONFIG_FALLBACK_SIZE-64k (in flash) to 0xf0000 (in RAM)
58 * This is for compatibility with the VGA ROM's BIOS callbacks.
60 //memcpy(0xf0000, (0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000);
61 memcpy(0xf0000, temp, 0x10000);
62 printk(BIOS_DEBUG, "Initializing VGA\n");
64 /* Set memory rate to 200 MHz. */
65 outb(0x3d, CRTM_INDEX);
66 reg8 = inb(CRTM_DATA);
69 outb(0x3d, CRTM_INDEX);
70 outb(reg8, CRTM_DATA);
72 /* Set framebuffer size. */
73 reg8 = (CONFIG_VIDEO_MB / 4);
77 pci_write_config8(dev, 0x04, 0x07);
78 pci_write_config8(dev, 0x0d, 0x20);
79 pci_write_config32(dev, 0x10, 0xf0000008);
80 pci_write_config32(dev, 0x14, 0xf4000000);
82 printk(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n");
84 printk(BIOS_DEBUG, "DO THE VGA BIOS\n");
86 /* VGA seems to work without this, but crash & burn with it. */
87 // printk(BIOS_DEBUG, "Enable VGA console\n");
88 // vga_enable_console();
90 /* It's not clear if these need to be programmed before or after
91 * the VGA BIOS runs. Try both, clean up later. */
92 /* Set memory rate to 200 MHz (again). */
93 outb(0x3d, CRTM_INDEX);
94 reg8 = inb(CRTM_DATA);
97 outb(0x3d, CRTM_INDEX);
98 outb(reg8, CRTM_DATA);
100 /* Set framebuffer size (again). */
101 reg8 = (CONFIG_VIDEO_MB / 4);
102 outb(0x39, SR_INDEX);
105 /* Clear the BOCHS BIOS out of memory, so it doesn't confuse Linux. */
106 memset(0xf0000, 0, 0x10000);
109 printk(BIOS_SPEW, "%s PCI Header Regs::\n", dev_path(dev));
111 for (i = 0 ; i < 16; i++)
113 printk(BIOS_SPEW, "%02X: ", i*16);
114 for (j = 0; j < 16; j++)
116 reg8 = pci_read_config8(dev, j+(i*16));
117 printk(BIOS_SPEW, "%02X ", reg8);
119 printk(BIOS_SPEW, "\n");
124 static const struct device_operations vga_operations = {
125 .read_resources = pci_dev_read_resources,
126 .set_resources = pci_dev_set_resources,
127 .enable_resources = pci_dev_enable_resources,
132 static const struct pci_driver vga_driver __pci_driver = {
133 .ops = &vga_operations,
134 .vendor = PCI_VENDOR_ID_VIA,
135 .device = PCI_DEVICE_ID_VIA_CN400_VGA,