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d1e6dc91 LD |
1 | /* |
2 | * Code borrowed from powerpc/kernel/pci-common.c | |
3 | * | |
4 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM | |
5 | * Copyright (C) 2014 ARM Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * version 2 as published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/init.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/of_pci.h> | |
18 | #include <linux/of_platform.h> | |
19 | #include <linux/slab.h> | |
20 | ||
21 | #include <asm/pci-bridge.h> | |
22 | ||
23 | /* | |
24 | * Called after each bus is probed, but before its children are examined | |
25 | */ | |
26 | void pcibios_fixup_bus(struct pci_bus *bus) | |
27 | { | |
28 | /* nothing to do, expected to be removed in the future */ | |
29 | } | |
30 | ||
31 | /* | |
32 | * We don't have to worry about legacy ISA devices, so nothing to do here | |
33 | */ | |
34 | resource_size_t pcibios_align_resource(void *data, const struct resource *res, | |
35 | resource_size_t size, resource_size_t align) | |
36 | { | |
37 | return res->start; | |
38 | } | |
39 | ||
40 | /* | |
41 | * Try to assign the IRQ number from DT when adding a new device | |
42 | */ | |
43 | int pcibios_add_device(struct pci_dev *dev) | |
44 | { | |
45 | dev->irq = of_irq_parse_and_map_pci(dev, 0, 0); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | ||
51 | #ifdef CONFIG_PCI_DOMAINS_GENERIC | |
52 | static bool dt_domain_found = false; | |
53 | ||
54 | void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent) | |
55 | { | |
56 | int domain = of_get_pci_domain_nr(parent->of_node); | |
57 | ||
58 | if (domain >= 0) { | |
59 | dt_domain_found = true; | |
60 | } else if (dt_domain_found == true) { | |
61 | dev_err(parent, "Node %s is missing \"linux,pci-domain\" property in DT\n", | |
62 | parent->of_node->full_name); | |
63 | return; | |
64 | } else { | |
65 | domain = pci_get_new_domain_nr(); | |
66 | } | |
67 | ||
68 | bus->domain_nr = domain; | |
69 | } | |
70 | #endif |