150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2004 Linux Networx
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* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
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* Copyright (C) 2009 coresystems GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <console/console.h>
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#include <arch/pciconf.h>
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#include <device/pci.h>
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#include <device/pci_ids.h>
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#include <device/pci_ops.h>
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/*
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* The only consumer of the return value of get_pbus() is ops_pci_bus().
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* ops_pci_bus() can handle being passed NULL and auto-picks working ops.
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*/
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static struct bus *get_pbus(device_t dev)
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{
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struct bus *pbus = NULL;
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if (!dev)
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die("get_pbus: dev is NULL!\n");
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else
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pbus = dev->bus;
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while (pbus && pbus->dev && !ops_pci_bus(pbus)) {
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if (pbus == pbus->dev->bus) {
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printk(BIOS_ALERT, "%s in endless loop looking for a "
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"parent bus with ops_pci_bus for %s, breaking "
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"out.\n", __func__, dev_path(dev));
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break;
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}
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pbus = pbus->dev->bus;
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}
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if (!pbus || !pbus->dev || !pbus->dev->ops
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|| !pbus->dev->ops->ops_pci_bus) {
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/* This can happen before the device tree is fully set up. */
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// printk(BIOS_EMERG, "%s: Cannot find PCI bus operations.\n",
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// dev_path(dev));
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pbus = NULL;
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}
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return pbus;
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}
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u8 pci_read_config8(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return ops_pci_bus(pbus)->read8(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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u16 pci_read_config16(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return ops_pci_bus(pbus)->read16(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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u32 pci_read_config32(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return ops_pci_bus(pbus)->read32(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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void pci_write_config8(device_t dev, unsigned int where, u8 val)
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{
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struct bus *pbus = get_pbus(dev);
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ops_pci_bus(pbus)->write8(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where, val);
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}
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void pci_write_config16(device_t dev, unsigned int where, u16 val)
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{
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struct bus *pbus = get_pbus(dev);
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ops_pci_bus(pbus)->write16(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where, val);
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}
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void pci_write_config32(device_t dev, unsigned int where, u32 val)
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{
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struct bus *pbus = get_pbus(dev);
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ops_pci_bus(pbus)->write32(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where, val);
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}
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#if CONFIG_MMCONF_SUPPORT
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u8 pci_mmio_read_config8(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return pci_ops_mmconf.read8(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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u16 pci_mmio_read_config16(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return pci_ops_mmconf.read16(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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u32 pci_mmio_read_config32(device_t dev, unsigned int where)
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{
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struct bus *pbus = get_pbus(dev);
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return pci_ops_mmconf.read32(pbus, dev->bus->secondary,
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dev->path.pci.devfn, where);
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}
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void pci_mmio_write_config8(device_t dev, unsigned int where, u8 val)
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{
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struct bus *pbus = get_pbus(dev);
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pci_ops_mmconf.write8(pbus, dev->bus->secondary, dev->path.pci.devfn,
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where, val);
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}
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void pci_mmio_write_config16(device_t dev, unsigned int where, u16 val)
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{
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struct bus *pbus = get_pbus(dev);
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pci_ops_mmconf.write16(pbus, dev->bus->secondary, dev->path.pci.devfn,
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where, val);
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}
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void pci_mmio_write_config32(device_t dev, unsigned int where, u32 val)
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{
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struct bus *pbus = get_pbus(dev);
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pci_ops_mmconf.write32(pbus, dev->bus->secondary, dev->path.pci.devfn,
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where, val);
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}
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#endif
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