1 /* 2 * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. 3 * <benh@kernel.crashing.org> 4 * and Arnd Bergmann, IBM Corp. 5 * 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. 10 * 11 */ 12 13 #undef DEBUG 14 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> 21 #include <linux/of.h> 22 #include <linux/of_device.h> 23 #include <linux/of_platform.h> 24 25 #include <asm/errno.h> 26 #include <asm/topology.h> 27 #include <asm/pci-bridge.h> 28 #include <asm/ppc-pci.h> 29 #include <linux/atomic.h> 30 31 #ifdef CONFIG_PPC_OF_PLATFORM_PCI 32 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. 37 */ 38 39 static int __devinit of_pci_phb_probe(struct platform_device *dev) 40 { 41 struct pci_controller *phb; 42 43 /* Check if we can do that ... */ 44 if (ppc_md.pci_setup_phb == NULL) 45 return -ENODEV; 46 47 pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name); 48 49 /* Alloc and setup PHB data structure */ 50 phb = pcibios_alloc_controller(dev->dev.of_node); 51 if (!phb) 52 return -ENODEV; 53 54 /* Setup parent in sysfs */ 55 phb->parent = &dev->dev; 56 57 /* Setup the PHB using arch provided callback */ 58 if (ppc_md.pci_setup_phb(phb)) { 59 pcibios_free_controller(phb); 60 return -ENODEV; 61 } 62 63 /* Process "ranges" property */ 64 pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0); 65 66 /* Init pci_dn data structures */ 67 pci_devs_phb_init_dynamic(phb); 68 69 /* Register devices with EEH */ 70 #ifdef CONFIG_EEH 71 if (dev->dev.of_node->child) 72 eeh_add_device_tree_early(dev->dev.of_node); 73 #endif /* CONFIG_EEH */ 74 75 /* Scan the bus */ 76 pcibios_scan_phb(phb); 77 if (phb->bus == NULL) 78 return -ENXIO; 79 80 /* Claim resources. This might need some rework as well depending 81 * wether we are doing probe-only or not, like assigning unassigned 82 * resources etc... 83 */ 84 pcibios_claim_one_bus(phb->bus); 85 86 /* Finish EEH setup */ 87 #ifdef CONFIG_EEH 88 eeh_add_device_tree_late(phb->bus); 89 #endif 90 91 /* Add probed PCI devices to the device model */ 92 pci_bus_add_devices(phb->bus); 93 94 return 0; 95 } 96 97 static struct of_device_id of_pci_phb_ids[] = { 98 { .type = "pci", }, 99 { .type = "pcix", }, 100 { .type = "pcie", }, 101 { .type = "pciex", }, 102 { .type = "ht", }, 103 {} 104 }; 105 106 static struct platform_driver of_pci_phb_driver = { 107 .probe = of_pci_phb_probe, 108 .driver = { 109 .name = "of-pci", 110 .owner = THIS_MODULE, 111 .of_match_table = of_pci_phb_ids, 112 }, 113 }; 114 115 static __init int of_pci_phb_init(void) 116 { 117 return platform_driver_register(&of_pci_phb_driver); 118 } 119 120 device_initcall(of_pci_phb_init); 121 122 #endif /* CONFIG_PPC_OF_PLATFORM_PCI */ 123