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/acpi.h>
14#include <linux/init.h>
15#include <linux/io.h>
16#include <linux/kernel.h>
17#include <linux/mm.h>
18#include <linux/of_pci.h>
19#include <linux/of_platform.h>
20#include <linux/slab.h>
21
22#include <asm/pci-bridge.h>
23
24/*
25 * Called after each bus is probed, but before its children are examined
26 */
27void pcibios_fixup_bus(struct pci_bus *bus)
28{
29	/* nothing to do, expected to be removed in the future */
30}
31
32/*
33 * We don't have to worry about legacy ISA devices, so nothing to do here
34 */
35resource_size_t pcibios_align_resource(void *data, const struct resource *res,
36				resource_size_t size, resource_size_t align)
37{
38	return res->start;
39}
40
41/*
42 * Try to assign the IRQ number from DT when adding a new device
43 */
44int pcibios_add_device(struct pci_dev *dev)
45{
46	dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
47
48	return 0;
49}
50
51/*
52 * raw_pci_read/write - Platform-specific PCI config space access.
53 */
54int raw_pci_read(unsigned int domain, unsigned int bus,
55		  unsigned int devfn, int reg, int len, u32 *val)
56{
57	return -ENXIO;
58}
59
60int raw_pci_write(unsigned int domain, unsigned int bus,
61		unsigned int devfn, int reg, int len, u32 val)
62{
63	return -ENXIO;
64}
65
66#ifdef CONFIG_ACPI
67/* Root bridge scanning */
68struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
69{
70	/* TODO: Should be revisited when implementing PCI on ACPI */
71	return NULL;
72}
73#endif
74