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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
*
* 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 <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "sb800.h"
static void pci_init(struct device *dev)
{
u32 dword;
u8 byte;
/* RPR 6.1 Enables the PCI-bridge subtractive decode */
/* This setting is strongly recommended since it supports some legacy PCI add-on cards,such as BIOS debug cards */
byte = pci_read_config8(dev, 0x4B);
byte |= 1 << 7;
pci_write_config8(dev, 0x4B, byte);
byte = pci_read_config8(dev, 0x40);
byte |= 1 << 5;
pci_write_config8(dev, 0x40, byte);
/* RPR6.2 PCI-bridge upstream dual address window */
/* this setting is applicable if the system memory is more than 4GB,and the PCI device can support dual address access */
byte = pci_read_config8(dev, 0x50);
byte |= 1 << 0;
pci_write_config8(dev, 0x50, byte);
/* RPR 6.3 Enable One-Prefetch-Channel Mode */
dword = pci_read_config32(dev, 0x64);
dword |= 1 << 20;
pci_write_config32(dev, 0x64, dword);
/* rpr6.4 Adjusting CLKRUN# */
dword = pci_read_config32(dev, 0x64);
dword |= (1 << 15);
pci_write_config32(dev, 0x64, dword);
}
static struct pci_operations lops_pci = {
.set_subsystem = 0,
};
static struct device_operations pci_ops = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = pci_init,
.scan_bus = pci_scan_bridge,
.reset_bus = pci_bus_reset,
.ops_pci = &lops_pci,
};
static const struct pci_driver pci_driver __pci_driver = {
.ops = &pci_ops,
.vendor = PCI_VENDOR_ID_ATI,
.device = PCI_DEVICE_ID_ATI_SB800_PCI,
};
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