| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |