| /* |
| * 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((void *)0xf0000, (const void *)(0xffffffff - CONFIG_ROM_SIZE - 0xffff), 0x10000); |
| |
| printk(BIOS_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(BIOS_DEBUG, "INSTALL REAL-MODE IDT\n"); |
| setup_realmode_idt(); |
| printk(BIOS_DEBUG, "DO THE VGA BIOS\n"); |
| do_vgabios(); |
| /* VGA seems to work without this, but crash & burn with it. */ |
| // printk(BIOS_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((void *)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, |
| }; |