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/*
23 * Called after each bus is probed, but before its children are examined
24 */
25void pcibios_fixup_bus(struct pci_bus *bus)
26{
27	/* nothing to do, expected to be removed in the future */
28}
29
30/*
31 * We don't have to worry about legacy ISA devices, so nothing to do here
32 */
33resource_size_t pcibios_align_resource(void *data, const struct resource *res,
34				resource_size_t size, resource_size_t align)
35{
36	return res->start;
37}
38
39/**
40 * pcibios_enable_device - Enable I/O and memory.
41 * @dev: PCI device to be enabled
42 * @mask: bitmask of BARs to enable
43 */
44int pcibios_enable_device(struct pci_dev *dev, int mask)
45{
46	if (pci_has_flag(PCI_PROBE_ONLY))
47		return 0;
48
49	return pci_enable_resources(dev, mask);
50}
51
52/*
53 * Try to assign the IRQ number from DT when adding a new device
54 */
55int pcibios_add_device(struct pci_dev *dev)
56{
57	dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
58
59	return 0;
60}
61
62/*
63 * raw_pci_read/write - Platform-specific PCI config space access.
64 */
65int raw_pci_read(unsigned int domain, unsigned int bus,
66		  unsigned int devfn, int reg, int len, u32 *val)
67{
68	return -ENXIO;
69}
70
71int raw_pci_write(unsigned int domain, unsigned int bus,
72		unsigned int devfn, int reg, int len, u32 val)
73{
74	return -ENXIO;
75}
76
77#ifdef CONFIG_ACPI
78/* Root bridge scanning */
79struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
80{
81	/* TODO: Should be revisited when implementing PCI on ACPI */
82	return NULL;
83}
84#endif