projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 83c2dc15 DH |
1 | /* ASB2305 PCI I/O mapping handler |
| 2 | * | |
| 3 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells (dhowells@redhat.com) | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public Licence | |
| 8 | * as published by the Free Software Foundation; either version | |
| 9 | * 2 of the Licence, or (at your option) any later version. | |
| 10 | */ | |
| 11 | #include <linux/pci.h> | |
| 12 | #include <linux/module.h> | |
| 13 | ||
| 14 | /* | |
| 15 | * Create a virtual mapping cookie for a PCI BAR (memory or IO) | |
| 16 | */ | |
| 17 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
| 18 | { | |
| 19 | resource_size_t start = pci_resource_start(dev, bar); | |
| 20 | resource_size_t len = pci_resource_len(dev, bar); | |
| 21 | unsigned long flags = pci_resource_flags(dev, bar); | |
| 22 | ||
| 23 | if (!len || !start) | |
| 24 | return NULL; | |
| 25 | ||
| 26 | if ((flags & IORESOURCE_IO) || (flags & IORESOURCE_MEM)) { | |
| 27 | if (flags & IORESOURCE_CACHEABLE && !(flags & IORESOURCE_IO)) | |
| 28 | return ioremap(start, len); | |
| 29 | else | |
| 30 | return ioremap_nocache(start, len); | |
| 31 | } | |
| 32 | ||
| 33 | return NULL; | |
| 34 | } | |
| 35 | EXPORT_SYMBOL(pci_iomap); |