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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2005 Linux Networx
* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
*
* 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 <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/agp.h>
static void agp_tune_dev(device_t dev)
{
unsigned cap;
cap = pci_find_capability(dev, PCI_CAP_ID_AGP);
if (!cap) {
return;
}
/* The OS is responsible for AGP tuning so do nothing here */
}
unsigned int agp_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn, unsigned int max)
{
device_t child;
max = pci_scan_bus(bus, min_devfn, max_devfn, max);
for(child = bus->children; child; child = child->sibling) {
if ( (child->path.u.pci.devfn < min_devfn) ||
(child->path.u.pci.devfn > max_devfn))
{
continue;
}
agp_tune_dev(child);
}
return max;
}
unsigned int agp_scan_bridge(device_t dev, unsigned int max)
{
return do_pci_scan_bridge(dev, max, agp_scan_bus);
}
/** Default device operations for AGP bridges */
static struct pci_operations agp_bus_ops_pci = {
.set_subsystem = 0,
};
struct device_operations default_agp_ops_bus = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = 0,
.scan_bus = agp_scan_bridge,
.enable = 0,
.reset_bus = pci_bus_reset,
.ops_pci = &agp_bus_ops_pci,
};
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