target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit.h

   1 /*
   2  * Copyright (C) 2009-2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2009-2013 Gabor Juhos <juhosg@openwrt.org>
   4  * Copyright (C) 2012 Jonas Gorski <jogo@openwrt.org>
   5  * Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published
   9  * by the Free Software Foundation.
  10  *
  11  */
  12
  13 #ifndef _MTDSPLIT_H
  14 #define _MTDSPLIT_H
  15
  16 #define KERNEL_PART_NAME        "kernel"
  17 #define ROOTFS_PART_NAME        "rootfs"
  18
  19 #define ROOTFS_SPLIT_NAME       "rootfs_data"
  20
  21 enum mtdsplit_part_type {
  22         MTDSPLIT_PART_TYPE_UNK = 0,
  23         MTDSPLIT_PART_TYPE_SQUASHFS,
  24         MTDSPLIT_PART_TYPE_JFFS2,
  25 };
  26
  27 #ifdef CONFIG_MTD_SPLIT
  28 int mtd_get_squashfs_len(struct mtd_info *master,
  29                          size_t offset,
  30                          size_t *squashfs_len);
  31
  32 int mtd_check_rootfs_magic(struct mtd_info *mtd, size_t offset,
  33                            enum mtdsplit_part_type *type);
  34
  35 int mtd_find_rootfs_from(struct mtd_info *mtd,
  36                          size_t from,
  37                          size_t limit,
  38                          size_t *ret_offset,
  39                          enum mtdsplit_part_type *type);
  40
  41 #else
  42 static inline int mtd_get_squashfs_len(struct mtd_info *master,
  43                                        size_t offset,
  44                                        size_t *squashfs_len)
  45 {
  46         return -ENODEV;
  47 }
  48
  49 static inline int mtd_check_rootfs_magic(struct mtd_info *mtd, size_t offset,
  50                                          enum mtdsplit_part_type *type)
  51 {
  52         return -EINVAL;
  53 }
  54
  55 static inline int mtd_find_rootfs_from(struct mtd_info *mtd,
  56                                        size_t from,
  57                                        size_t limit,
  58                                        size_t *ret_offset,
  59                                        enum mtdsplit_part_type *type)
  60 {
  61         return -ENODEV;
  62 }
  63 #endif /* CONFIG_MTD_SPLIT */
  64
  65 #endif /* _MTDSPLIT_H */