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7eebde70 BH |
1 | /* |
2 | * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp. | |
3 | * <benh@kernel.crashing.org> | |
4c9d2800 | 4 | * and Arnd Bergmann, IBM Corp. |
7eebde70 BH |
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> | |
4b16f8e2 | 18 | #include <linux/export.h> |
7eebde70 | 19 | #include <linux/mod_devicetable.h> |
4c9d2800 | 20 | #include <linux/pci.h> |
283029d1 | 21 | #include <linux/of.h> |
cd6eed37 SR |
22 | #include <linux/of_device.h> |
23 | #include <linux/of_platform.h> | |
eb740b5f | 24 | #include <linux/atomic.h> |
7eebde70 BH |
25 | |
26 | #include <asm/errno.h> | |
12d04eef | 27 | #include <asm/topology.h> |
4c9d2800 BH |
28 | #include <asm/pci-bridge.h> |
29 | #include <asm/ppc-pci.h> | |
eb740b5f | 30 | #include <asm/eeh.h> |
9309180f | 31 | |
4c9d2800 BH |
32 | #ifdef CONFIG_PPC_OF_PLATFORM_PCI |
33 | ||
34 | /* The probing of PCI controllers from of_platform is currently | |
35 | * 64 bits only, mostly due to gratuitous differences between | |
36 | * the 32 and 64 bits PCI code on PowerPC and the 32 bits one | |
37 | * lacking some bits needed here. | |
38 | */ | |
39 | ||
cad5cef6 | 40 | static int of_pci_phb_probe(struct platform_device *dev) |
4c9d2800 BH |
41 | { |
42 | struct pci_controller *phb; | |
43 | ||
44 | /* Check if we can do that ... */ | |
45 | if (ppc_md.pci_setup_phb == NULL) | |
46 | return -ENODEV; | |
47 | ||
61c7a080 | 48 | pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name); |
4c9d2800 BH |
49 | |
50 | /* Alloc and setup PHB data structure */ | |
61c7a080 | 51 | phb = pcibios_alloc_controller(dev->dev.of_node); |
4c9d2800 BH |
52 | if (!phb) |
53 | return -ENODEV; | |
54 | ||
55 | /* Setup parent in sysfs */ | |
56 | phb->parent = &dev->dev; | |
57 | ||
58 | /* Setup the PHB using arch provided callback */ | |
59 | if (ppc_md.pci_setup_phb(phb)) { | |
60 | pcibios_free_controller(phb); | |
61 | return -ENODEV; | |
62 | } | |
63 | ||
64 | /* Process "ranges" property */ | |
61c7a080 | 65 | pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0); |
4c9d2800 | 66 | |
4c9d2800 BH |
67 | /* Init pci_dn data structures */ |
68 | pci_devs_phb_init_dynamic(phb); | |
69 | ||
eb740b5f GS |
70 | /* Create EEH devices for the PHB */ |
71 | eeh_dev_phb_init_dynamic(phb); | |
72 | ||
4c9d2800 | 73 | /* Register devices with EEH */ |
61c7a080 | 74 | if (dev->dev.of_node->child) |
ff57b454 | 75 | eeh_add_device_tree_early(PCI_DN(dev->dev.of_node)); |
4c9d2800 BH |
76 | |
77 | /* Scan the bus */ | |
b5d937de | 78 | pcibios_scan_phb(phb); |
7cfb62a2 IK |
79 | if (phb->bus == NULL) |
80 | return -ENXIO; | |
4c9d2800 BH |
81 | |
82 | /* Claim resources. This might need some rework as well depending | |
48fc7f7e | 83 | * whether we are doing probe-only or not, like assigning unassigned |
4c9d2800 BH |
84 | * resources etc... |
85 | */ | |
86 | pcibios_claim_one_bus(phb->bus); | |
87 | ||
88 | /* Finish EEH setup */ | |
4c9d2800 | 89 | eeh_add_device_tree_late(phb->bus); |
4c9d2800 BH |
90 | |
91 | /* Add probed PCI devices to the device model */ | |
92 | pci_bus_add_devices(phb->bus); | |
93 | ||
6a040ce7 TLSC |
94 | /* sysfs files should only be added after devices are added */ |
95 | eeh_add_sysfs_files(phb->bus); | |
96 | ||
4c9d2800 BH |
97 | return 0; |
98 | } | |
99 | ||
ce6d73c9 | 100 | static const struct of_device_id of_pci_phb_ids[] = { |
4c9d2800 BH |
101 | { .type = "pci", }, |
102 | { .type = "pcix", }, | |
103 | { .type = "pcie", }, | |
104 | { .type = "pciex", }, | |
105 | { .type = "ht", }, | |
106 | {} | |
107 | }; | |
108 | ||
00006124 | 109 | static struct platform_driver of_pci_phb_driver = { |
cd6eed37 SR |
110 | .probe = of_pci_phb_probe, |
111 | .driver = { | |
112 | .name = "of-pci", | |
4018294b | 113 | .of_match_table = of_pci_phb_ids, |
cd6eed37 | 114 | }, |
4c9d2800 BH |
115 | }; |
116 | ||
ebb242d5 | 117 | builtin_platform_driver(of_pci_phb_driver); |
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118 | |
119 | #endif /* CONFIG_PPC_OF_PLATFORM_PCI */ |