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

   1 /*
   2  * Copyright (C) 2009-2013 Felix Fietkau <nbd@nbd.name>
   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 #define UBI_PART_NAME           "ubi"
  19
  20 #define ROOTFS_SPLIT_NAME       "rootfs_data"
  21
  22 enum mtdsplit_part_type {
  23         MTDSPLIT_PART_TYPE_UNK = 0,
  24         MTDSPLIT_PART_TYPE_SQUASHFS,
  25         MTDSPLIT_PART_TYPE_JFFS2,
  26         MTDSPLIT_PART_TYPE_UBI,
  27 };
  28
  29 #ifdef CONFIG_MTD_SPLIT
  30 int mtd_get_squashfs_len(struct mtd_info *master,
  31                          size_t offset,
  32                          size_t *squashfs_len);
  33
  34 int mtd_check_rootfs_magic(struct mtd_info *mtd, size_t offset,
  35                            enum mtdsplit_part_type *type);
  36
  37 int mtd_find_rootfs_from(struct mtd_info *mtd,
  38                          size_t from,
  39                          size_t limit,
  40                          size_t *ret_offset,
  41                          enum mtdsplit_part_type *type);
  42
  43 #else
  44 static inline int mtd_get_squashfs_len(struct mtd_info *master,
  45                                        size_t offset,
  46                                        size_t *squashfs_len)
  47 {
  48         return -ENODEV;
  49 }
  50
  51 static inline int mtd_check_rootfs_magic(struct mtd_info *mtd, size_t offset,
  52                                          enum mtdsplit_part_type *type)
  53 {
  54         return -EINVAL;
  55 }
  56
  57 static inline int mtd_find_rootfs_from(struct mtd_info *mtd,
  58                                        size_t from,
  59                                        size_t limit,
  60                                        size_t *ret_offset,
  61                                        enum mtdsplit_part_type *type)
  62 {
  63         return -ENODEV;
  64 }
  65 #endif /* CONFIG_MTD_SPLIT */
  66
  67 #endif /* _MTDSPLIT_H */