Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * iomap.c, Memory Mapped I/O routines for MIPS architecture. | |
3 | * | |
4 | * This code is based on lib/iomap.c, by Linus Torvalds. | |
5 | * | |
6 | * Copyright (C) 2004-2005 Yoichi Yuasa <yuasa@hh.iij4u.or.jp> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/pci.h> | |
25 | ||
26 | #include <asm/io.h> | |
27 | ||
28 | void __iomem *ioport_map(unsigned long port, unsigned int nr) | |
29 | { | |
30 | unsigned long end; | |
31 | ||
32 | end = port + nr - 1UL; | |
33 | if (ioport_resource.start > port || | |
34 | ioport_resource.end < end || port > end) | |
35 | return NULL; | |
36 | ||
37 | return (void __iomem *)(mips_io_port_base + port); | |
38 | } | |
39 | ||
40 | void ioport_unmap(void __iomem *addr) | |
41 | { | |
42 | } | |
43 | EXPORT_SYMBOL(ioport_map); | |
44 | EXPORT_SYMBOL(ioport_unmap); | |
45 | ||
46 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
47 | { | |
48 | unsigned long start, len, flags; | |
49 | ||
50 | if (dev == NULL) | |
51 | return NULL; | |
52 | ||
53 | start = pci_resource_start(dev, bar); | |
54 | len = pci_resource_len(dev, bar); | |
55 | if (!start || !len) | |
56 | return NULL; | |
57 | ||
58 | if (maxlen != 0 && len > maxlen) | |
59 | len = maxlen; | |
60 | ||
61 | flags = pci_resource_flags(dev, bar); | |
62 | if (flags & IORESOURCE_IO) | |
63 | return ioport_map(start, len); | |
64 | if (flags & IORESOURCE_MEM) { | |
65 | if (flags & IORESOURCE_CACHEABLE) | |
66 | return ioremap_cacheable_cow(start, len); | |
67 | return ioremap_nocache(start, len); | |
68 | } | |
69 | ||
70 | return NULL; | |
71 | } | |
72 | ||
73 | void pci_iounmap(struct pci_dev *dev, void __iomem *addr) | |
74 | { | |
75 | iounmap(addr); | |
76 | } | |
77 | EXPORT_SYMBOL(pci_iomap); | |
78 | EXPORT_SYMBOL(pci_iounmap); |