/* * 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 int 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 int min_devfn, unsigned int 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.pci.devfn < min_devfn) || (child->path.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, };