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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
* Copyright (C) 2011 Alexandru Gagniuc <mr.nuke.me@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; 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.
*/
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include "k8x8xx.h"
static void host_old_enable(struct device *dev)
{
int agp3;
/* some HT tweaking */
pci_write_config8(dev, 0x50, 0x03);
pci_write_config8(dev, 0x55, 0x2c);
/* AGP setup */
pci_write_config8(dev, 0xac, 0x06);
pci_write_config8(dev, 0xad, 0x08);
pci_write_config8(dev, 0xfd, 0x02);
pci_write_config8(dev, 0x85, 0xb0);
pci_write_config8(dev, 0x87, 0x07);
pci_write_config8(dev, 0xfd, 0x06); // this is required for the following write to work
pci_write_config8(dev, 0xaf, 0x88);
pci_write_config8(dev, 0xfd, 0x04); // select AGP 3.0
agp3 = pci_read_config8(dev, 0x84) & 0x08;
pci_write_config8(dev, 0xb1, agp3 ? 0x00 : 0x9B);
pci_write_config8(dev, 0xb3, agp3 ? 0x00 : 0x9B);
pci_write_config8(dev, 0xb0, 0x40);
pci_write_config8(dev, 0xb2, 0x11);
pci_write_config8(dev, 0xed, 0x40);
}
static void host_old_init(struct device *dev)
{
k8x8xx_vt8237r_cfg(dev, NULL);
}
static void host_enable(struct device *dev)
{
/* Multiple function control */
pci_write_config8(dev, K8T890_MULTIPLE_FN_EN, 0x01);
printk(BIOS_DEBUG, " VIA_X_0 device dump:\n");
dump_south(dev);
}
static void host_init(struct device *dev)
{
u8 reg;
/* AGP Capability Header Control */
reg = pci_read_config8(dev, 0x4d);
reg |= 0x20; /* GART access enabled by either D0F0 Rx90[8] or D1F0 Rx90[8] */
pci_write_config8(dev, 0x4d, reg);
/* GD Output Stagger Delay */
reg = pci_read_config8(dev, 0x42);
reg |= 0x10; /* AD[31:16] with 1ns */
pci_write_config8(dev, 0x42, reg);
/* AGP Control */
reg = pci_read_config8(dev, 0xbc);
reg |= 0x20; /* AGP Read Snoop DRAM Post-Write Buffer */
pci_write_config8(dev, 0xbc, reg);
}
static const struct device_operations host_ops_old = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = host_old_enable,
.init = host_old_init,
.ops_pci = 0,
};
static struct pci_operations lops_pci = {
.set_subsystem = pci_dev_set_subsystem,
};
static const struct device_operations host_ops_t = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = host_enable,
.ops_pci = &lops_pci,
};
static const struct device_operations host_ops_m = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.enable = host_enable,
.init = host_init,
.ops_pci = &lops_pci,
};
static const struct pci_driver northbridge_driver_t800_old __pci_driver = {
.ops = &host_ops_old,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T800_AGP,
};
static const struct pci_driver northbridge_driver_t800 __pci_driver = {
.ops = &host_ops_t,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T800_HT_AGP_CTR,
};
static const struct pci_driver northbridge_driver_m800 __pci_driver = {
.ops = &host_ops_m,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8M800_HT_AGP_CTR,
};
static const struct pci_driver northbridge_driver_t890 __pci_driver = {
.ops = &host_ops_t,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CE_0,
};
static const struct pci_driver northbridge_driver_t890cf __pci_driver = {
.ops = &host_ops_t,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8T890CF_0,
};
static const struct pci_driver northbridge_driver_m890 __pci_driver = {
.ops = &host_ops_m,
.vendor = PCI_VENDOR_ID_VIA,
.device = PCI_DEVICE_ID_VIA_K8M890CE_0,
};
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