aboutsummaryrefslogtreecommitdiff
path: root/arch/mn10300/unit-asb2305/pci-iomap.c
blob: dbceae4307dacffd940c035c204a8be972439bf7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
/* ASB2305 PCI I/O mapping handler
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#include <linux/pci.h>
#include <linux/module.h>

/*
 * Create a virtual mapping cookie for a PCI BAR (memory or IO)
 */
void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
{
	unsigned long start = pci_resource_start(dev, bar);
	unsigned long len = pci_resource_len(dev, bar);
	unsigned long flags = pci_resource_flags(dev, bar);

	if (!len || !start)
		return NULL;

	if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM))
		return (void __iomem *) start;

	return NULL;
}
EXPORT_SYMBOL(pci_iomap);