2 * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
3 * <benh@kernel.crashing.org>
4 * and Arnd Bergmann, IBM Corp.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
15 #include <linux/string.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/mod_devicetable.h>
20 #include <linux/pci.h>
22 #include <linux/of_device.h>
23 #include <linux/of_platform.h>
25 #include <asm/errno.h>
26 #include <asm/topology.h>
27 #include <asm/pci-bridge.h>
28 #include <asm/ppc-pci.h>
29 #include <asm/atomic.h>
31 #ifdef CONFIG_PPC_OF_PLATFORM_PCI
33 /* The probing of PCI controllers from of_platform is currently
34 * 64 bits only, mostly due to gratuitous differences between
35 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
36 * lacking some bits needed here.
39 static int __devinit of_pci_phb_probe(struct platform_device *dev)
41 struct pci_controller *phb;
43 /* Check if we can do that ... */
44 if (ppc_md.pci_setup_phb == NULL)
47 pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
49 /* Alloc and setup PHB data structure */
50 phb = pcibios_alloc_controller(dev->dev.of_node);
54 /* Setup parent in sysfs */
55 phb->parent = &dev->dev;
57 /* Setup the PHB using arch provided callback */
58 if (ppc_md.pci_setup_phb(phb)) {
59 pcibios_free_controller(phb);
63 /* Process "ranges" property */
64 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
66 /* Init pci_dn data structures */
67 pci_devs_phb_init_dynamic(phb);
69 /* Register devices with EEH */
71 if (dev->dev.of_node->child)
72 eeh_add_device_tree_early(dev->dev.of_node);
73 #endif /* CONFIG_EEH */
76 pcibios_scan_phb(phb);
80 /* Claim resources. This might need some rework as well depending
81 * wether we are doing probe-only or not, like assigning unassigned
84 pcibios_claim_one_bus(phb->bus);
86 /* Finish EEH setup */
88 eeh_add_device_tree_late(phb->bus);
91 /* Add probed PCI devices to the device model */
92 pci_bus_add_devices(phb->bus);
97 static struct of_device_id of_pci_phb_ids[] = {
101 { .type = "pciex", },
106 static struct platform_driver of_pci_phb_driver = {
107 .probe = of_pci_phb_probe,
110 .owner = THIS_MODULE,
111 .of_match_table = of_pci_phb_ids,
115 static __init int of_pci_phb_init(void)
117 return platform_driver_register(&of_pci_phb_driver);
120 device_initcall(of_pci_phb_init);
122 #endif /* CONFIG_PPC_OF_PLATFORM_PCI */