/* * This file is part of the coreboot project. * * Copyright (C) 2004 Linux Networx * (Written by Eric Biederman 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 #include #include #include #include #include #include /** * Walk up the tree from the current dev, in an attempt to find a * bus that has ops_pci_bus set. The assumption here being that if it * has ops_pci_bus set, then it can do bus operations. */ static struct bus *get_pbus(struct device *dev) { struct bus *pbus = dev->bus; while (pbus && pbus->dev && !ops_pci_bus(pbus)) { pbus = pbus->dev->bus; } if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_pci_bus) { printk(BIOS_ALERT, "%s: %s(%s) Cannot find PCI bus operations", __func__, dev->dtsname, dev_path(dev)); die(""); } return pbus; } u8 pci_read_config8(struct device *dev, unsigned int where) { struct bus *pbus = get_pbus(dev); return ops_pci_bus(pbus)->read8(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where); } u16 pci_read_config16(struct device *dev, unsigned int where) { struct bus *pbus = get_pbus(dev); return ops_pci_bus(pbus)->read16(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where); } u32 pci_read_config32(struct device *dev, unsigned int where) { struct bus *pbus = get_pbus(dev); return ops_pci_bus(pbus)->read32(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where); } void pci_write_config8(struct device *dev, unsigned int where, u8 val) { struct bus *pbus = get_pbus(dev); ops_pci_bus(pbus)->write8(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where, val); } void pci_write_config16(struct device *dev, unsigned int where, u16 val) { struct bus *pbus = get_pbus(dev); ops_pci_bus(pbus)->write16(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where, val); } void pci_write_config32(struct device *dev, unsigned int where, u32 val) { struct bus *pbus = get_pbus(dev); ops_pci_bus(pbus)->write32(PCI_BDEVFN(dev->bus->secondary, dev->path.pci.devfn), where, val); }