2 * MTD partitioning layer definitions
4 * (C) 2000 Nicolas Pitre <nico@fluxnic.net>
9 #ifndef MTD_PARTITIONS_H
10 #define MTD_PARTITIONS_H
12 #include <linux/types.h>
16 * Partition definition structure:
18 * An array of struct partition is passed along with a MTD object to
19 * mtd_device_register() to create them.
21 * For each partition, these fields are available:
22 * name: string that will be used to label the partition's MTD device.
23 * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition
24 * will extend to the end of the master MTD device.
25 * offset: absolute starting position within the master MTD device; if
26 * defined as MTDPART_OFS_APPEND, the partition will start where the
27 * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block;
28 * if MTDPART_OFS_RETAIN, consume as much as possible, leaving size
29 * after the end of partition.
30 * mask_flags: contains flags that have to be masked (removed) from the
31 * master MTD flag set for the corresponding MTD partition.
32 * For example, to force a read-only partition, simply adding
33 * MTD_WRITEABLE to the mask_flags will do the trick.
35 * Note: writeable partitions require their size and offset be
36 * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK).
39 struct mtd_partition {
40 char *name; /* identifier string */
41 uint64_t size; /* partition size */
42 uint64_t offset; /* offset within the master MTD space */
43 uint32_t mask_flags; /* master MTD flags to mask out for this partition */
44 struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only) */
47 #define MTDPART_OFS_RETAIN (-3)
48 #define MTDPART_OFS_NXTBLK (-2)
49 #define MTDPART_OFS_APPEND (-1)
50 #define MTDPART_SIZ_FULL (0)
56 * Functions dealing with the various ways of partitioning the space
59 struct mtd_part_parser {
60 struct list_head list;
63 int (*parse_fn)(struct mtd_info *, struct mtd_partition **, unsigned long);
66 extern int register_mtd_parser(struct mtd_part_parser *parser);
67 extern int deregister_mtd_parser(struct mtd_part_parser *parser);
68 extern int parse_mtd_partitions(struct mtd_info *master, const char **types,
69 struct mtd_partition **pparts, unsigned long origin);
71 #define put_partition_parser(p) do { module_put((p)->owner); } while(0)
76 #ifdef CONFIG_MTD_OF_PARTS
77 int __devinit of_mtd_parse_partitions(struct device *dev,
78 struct device_node *node,
79 struct mtd_partition **pparts);
81 static inline int of_mtd_parse_partitions(struct device *dev,
82 struct device_node *node,
83 struct mtd_partition **pparts)
89 int mtd_is_partition(struct mtd_info *mtd);
90 int mtd_add_partition(struct mtd_info *master, char *name,
91 long long offset, long long length);
92 int mtd_del_partition(struct mtd_info *master, int partno);