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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Linux Networx
* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
* Copyright (C) 2009 coresystems GmbH
*
* 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 <arch/pciconf.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
/*
* The only consumer of the return value of get_pbus() is ops_pci_bus().
* ops_pci_bus() can handle being passed NULL and auto-picks working ops.
*/
static struct bus *get_pbus(device_t dev)
{
struct bus *pbus = NULL;
if (!dev)
die("get_pbus: dev is NULL!\n");
else
pbus = dev->bus;
while(pbus && pbus->dev && !ops_pci_bus(pbus)) {
if (pbus == pbus->dev->bus) {
printk(BIOS_ALERT, "%s in endless loop looking for a parent "
"bus with ops_pci_bus for %s, breaking out.\n",
__func__, dev_path(dev));
break;
}
pbus = pbus->dev->bus;
}
if (!pbus || !pbus->dev || !pbus->dev->ops || !pbus->dev->ops->ops_pci_bus) {
/* This can happen before the device tree is set up completely. */
//printk(BIOS_EMERG, "%s: Cannot find pci bus operations.\n", dev_path(dev));
pbus = NULL;
}
return pbus;
}
uint8_t pci_read_config8(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return ops_pci_bus(pbus)->read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
uint16_t pci_read_config16(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return ops_pci_bus(pbus)->read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
uint32_t pci_read_config32(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return ops_pci_bus(pbus)->read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
void pci_write_config8(device_t dev, unsigned where, uint8_t val)
{
struct bus *pbus = get_pbus(dev);
ops_pci_bus(pbus)->write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
void pci_write_config16(device_t dev, unsigned where, uint16_t val)
{
struct bus *pbus = get_pbus(dev);
ops_pci_bus(pbus)->write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
void pci_write_config32(device_t dev, unsigned where, uint32_t val)
{
struct bus *pbus = get_pbus(dev);
ops_pci_bus(pbus)->write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
#if CONFIG_MMCONF_SUPPORT
uint8_t pci_mmio_read_config8(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return pci_ops_mmconf.read8(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
uint16_t pci_mmio_read_config16(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return pci_ops_mmconf.read16(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
uint32_t pci_mmio_read_config32(device_t dev, unsigned where)
{
struct bus *pbus = get_pbus(dev);
return pci_ops_mmconf.read32(pbus, dev->bus->secondary, dev->path.pci.devfn, where);
}
void pci_mmio_write_config8(device_t dev, unsigned where, uint8_t val)
{
struct bus *pbus = get_pbus(dev);
pci_ops_mmconf.write8(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
void pci_mmio_write_config16(device_t dev, unsigned where, uint16_t val)
{
struct bus *pbus = get_pbus(dev);
pci_ops_mmconf.write16(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
void pci_mmio_write_config32(device_t dev, unsigned where, uint32_t val)
{
struct bus *pbus = get_pbus(dev);
pci_ops_mmconf.write32(pbus, dev->bus->secondary, dev->path.pci.devfn, where, val);
}
#endif
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