diff options
Diffstat (limited to 'src/northbridge/via/cn700/vga.c')
-rw-r--r-- | src/northbridge/via/cn700/vga.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/northbridge/via/cn700/vga.c b/src/northbridge/via/cn700/vga.c new file mode 100644 index 0000000000..15756841fd --- /dev/null +++ b/src/northbridge/via/cn700/vga.c @@ -0,0 +1,125 @@ +/* + * 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" + +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 the BOCHs BIOS from 0xFFFFFFFF - ROM_SIZE - BOCHs size (64k) to 0xf0000 + This is for compatibility with the VGA ROM's BIOS callbacks */ + memcpy(0xf0000, (0xFFFFFFFF - ROM_SIZE - 0x10000), 0x10000); + + printk_debug("Initializing VGA\n"); + + pci_write_config8(dev, 0x3c, 0xb); + + /* Set memory rate to 200MHz */ + 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); + pci_write_config8(dev, 0x3e, 0x02); + pci_write_config8(dev, 0x3c, 0x0a); + + + printk_debug("INSTALL REAL-MODE IDT\n"); + setup_realmode_idt(); + printk_debug("DO THE VGA BIOS\n"); + do_vgabios(); + /* VGA seems to work without this, but crash & burn with it */ + //printk_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 200MHz */ + 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(0xf0000, 0, 0x10000); +} + +static void vga_read_resources(device_t dev) +{ + dev->rom_address = 0xfff80000; + dev->on_mainboard=1; + pci_dev_read_resources(dev); +} + + +static const struct device_operations vga_operations = { + .read_resources = vga_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, +}; |