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/*
* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
* <benh@kernel.crashing.org>
* and Arnd Bergmann, IBM Corp.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*
*/
#undef DEBUG
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <asm/errno.h>
#include <asm/topology.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
#include <asm/atomic.h>
/*
* The list of OF IDs below is used for matching bus types in the
* system whose devices are to be exposed as of_platform_devices.
*
* This is the default list valid for most platforms. This file provides
* functions who can take an explicit list if necessary though
*
* The search is always performed recursively looking for children of
* the provided device_node and recursively if such a children matches
* a bus type in the list
*/
const struct of_device_id of_default_bus_ids[] = {
{ .type = "soc", },
{ .compatible = "soc", },
{ .type = "spider", },
{ .type = "axon", },
{ .type = "plb5", },
{ .type = "plb4", },
{ .type = "opb", },
{ .type = "ebc", },
{},
};
struct bus_type of_platform_bus_type = {
.uevent = of_device_uevent,
};
EXPORT_SYMBOL(of_platform_bus_type);
static int __init of_bus_driver_init(void)
{
return of_bus_type_init(&of_platform_bus_type, "of_platform");
}
postcore_initcall(of_bus_driver_init);
static int of_dev_node_match(struct device *dev, void *data)
{
return to_of_device(dev)->dev.of_node == data;
}
struct of_device *of_find_device_by_node(struct device_node *np)
{
struct device *dev;
dev = bus_find_device(&of_platform_bus_type,
NULL, np, of_dev_node_match);
if (dev)
return to_of_device(dev);
return NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);
static int of_dev_phandle_match(struct device *dev, void *data)
{
phandle *ph = data;
return to_of_device(dev)->dev.of_node->phandle == *ph;
}
struct of_device *of_find_device_by_phandle(phandle ph)
{
struct device *dev;
dev = bus_find_device(&of_platform_bus_type,
NULL, &ph, of_dev_phandle_match);
if (dev)
return to_of_device(dev);
return NULL;
}
EXPORT_SYMBOL(of_find_device_by_phandle);
#ifdef CONFIG_PPC_OF_PLATFORM_PCI
/* The probing of PCI controllers from of_platform is currently
* 64 bits only, mostly due to gratuitous differences between
* the 32 and 64 bits PCI code on PowerPC and the 32 bits one
* lacking some bits needed here.
*/
static int __devinit of_pci_phb_probe(struct of_device *dev,
const struct of_device_id *match)
{
struct pci_controller *phb;
/* Check if we can do that ... */
if (ppc_md.pci_setup_phb == NULL)
return -ENODEV;
pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
/* Alloc and setup PHB data structure */
phb = pcibios_alloc_controller(dev->dev.of_node);
if (!phb)
return -ENODEV;
/* Setup parent in sysfs */
phb->parent = &dev->dev;
/* Setup the PHB using arch provided callback */
if (ppc_md.pci_setup_phb(phb)) {
pcibios_free_controller(phb);
return -ENODEV;
}
/* Process "ranges" property */
pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
/* Init pci_dn data structures */
pci_devs_phb_init_dynamic(phb);
/* Register devices with EEH */
#ifdef CONFIG_EEH
if (dev->dev.of_node->child)
eeh_add_device_tree_early(dev->dev.of_node);
#endif /* CONFIG_EEH */
/* Scan the bus */
pcibios_scan_phb(phb, dev->dev.of_node);
if (phb->bus == NULL)
return -ENXIO;
/* Claim resources. This might need some rework as well depending
* wether we are doing probe-only or not, like assigning unassigned
* resources etc...
*/
pcibios_claim_one_bus(phb->bus);
/* Finish EEH setup */
#ifdef CONFIG_EEH
eeh_add_device_tree_late(phb->bus);
#endif
/* Add probed PCI devices to the device model */
pci_bus_add_devices(phb->bus);
return 0;
}
static struct of_device_id of_pci_phb_ids[] = {
{ .type = "pci", },
{ .type = "pcix", },
{ .type = "pcie", },
{ .type = "pciex", },
{ .type = "ht", },
{}
};
static struct of_platform_driver of_pci_phb_driver = {
.probe = of_pci_phb_probe,
.driver = {
.name = "of-pci",
.owner = THIS_MODULE,
.of_match_table = of_pci_phb_ids,
},
};
static __init int of_pci_phb_init(void)
{
return of_register_platform_driver(&of_pci_phb_driver);
}
device_initcall(of_pci_phb_init);
#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
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