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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2009 coresystems GmbH
*
* 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.
*
* 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
*/
#include <console/console.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
/* This is the AGP 3.0 "bridge" @ Bus 0 Device 1 Func 0 */
static void agp_bridge_init(device_t dev)
{
device_t north_dev;
u8 reg8;
north_dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3324, 0);
pci_write_config8(north_dev, 0xa0, 0x1); // Enable CPU Direct Access Frame Buffer
pci_write_config8(north_dev, 0xa2, 0x4a);
reg8 = pci_read_config8(north_dev, 0xc0);
reg8 |= 0x1;
pci_write_config8(north_dev, 0xc0, reg8);
/*
* Since Internal Graphic already set to AGP3.0 compatible in its Capability Pointer
* We must set RAGP8X=1 B0D0F0 Rx84[3]=1 from backdoor register B0D0F0 RxB5[1:0]=11b
*/
north_dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x0324, 0);
reg8 = pci_read_config8(north_dev, 0xb5);
reg8 |= 0x3;
pci_write_config8(north_dev, 0xb5, reg8);
pci_write_config8(north_dev, 0x94, 0x20);
pci_write_config8(north_dev, 0x13, 0xd0);
pci_write_config16(dev, 0x4, 0x0007);
pci_write_config8(dev, 0x19, 0x01);
pci_write_config8(dev, 0x1a, 0x01);
pci_write_config8(dev, 0x1c, 0xe0);
pci_write_config8(dev, 0x1d, 0xe0);
pci_write_config16(dev, 0x1e, 0xa220);
pci_write_config16(dev, 0x20, 0xdd00);
pci_write_config16(dev, 0x22, 0xdef0);
pci_write_config16(dev, 0x24, 0xa000);
pci_write_config16(dev, 0x26, 0xbff0);
pci_write_config8(dev, 0x3e, 0x0c);
pci_write_config8(dev, 0x40, 0x8b);
pci_write_config8(dev, 0x41, 0x43);
pci_write_config8(dev, 0x42, 0x62);
pci_write_config8(dev, 0x43, 0x44);
pci_write_config8(dev, 0x44, 0x34);
}
static void cx700_noop(device_t dev)
{
}
static struct device_operations agp_bridge_operations = {
.read_resources = cx700_noop,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = agp_bridge_init,
.scan_bus = pci_scan_bridge,
};
static const struct pci_driver agp_bridge_driver __pci_driver = {
.ops = &agp_bridge_operations,
.vendor = PCI_VENDOR_ID_VIA,
.device = 0xb198,
};
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