diff options
Diffstat (limited to 'arch/powerpc/kernel/of_platform.c')
| -rw-r--r-- | arch/powerpc/kernel/of_platform.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c index 7a0e77af7c9..6029543c1b5 100644 --- a/arch/powerpc/kernel/of_platform.c +++ b/arch/powerpc/kernel/of_platform.c @@ -1,6 +1,7 @@ /* * 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 @@ -17,12 +18,15 @@ #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/slab.h> +#include <linux/pci.h> #include <asm/errno.h> #include <asm/dcr.h> #include <asm/of_device.h> #include <asm/of_platform.h> #include <asm/topology.h> +#include <asm/pci-bridge.h> +#include <asm/ppc-pci.h> /* * The list of OF IDs below is used for matching bus types in the @@ -377,3 +381,102 @@ struct of_device *of_find_device_by_phandle(phandle ph) 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; + + printk(KERN_INFO "Setting up PCI bus %s\n", dev->node->full_name); + + /* Alloc and setup PHB data structure */ + phb = pcibios_alloc_controller(dev->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->node, 0); + + /* Setup IO space. + * This will not work properly for ISA IOs, something needs to be done + * about it if we ever generalize that way of probing PCI brigdes + */ + pci_setup_phb_io_dynamic(phb, 0); + + /* Init pci_dn data structures */ + pci_devs_phb_init_dynamic(phb); + + /* Register devices with EEH */ +#ifdef CONFIG_EEH + if (dev->node->child) + eeh_add_device_tree_early(dev->node); +#endif /* CONFIG_EEH */ + + /* Scan the bus */ + scan_phb(phb); + + /* 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 = { + .name = "of-pci", + .match_table = of_pci_phb_ids, + .probe = of_pci_phb_probe, + .driver = { + .multithread_probe = 1, + }, +}; + +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 */ |