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1da177e4 LT |
1 | /* |
2 | * MTD partitioning layer definitions | |
3 | * | |
2f82af08 | 4 | * (C) 2000 Nicolas Pitre <nico@fluxnic.net> |
1da177e4 LT |
5 | * |
6 | * This code is GPL | |
1da177e4 LT |
7 | */ |
8 | ||
9 | #ifndef MTD_PARTITIONS_H | |
10 | #define MTD_PARTITIONS_H | |
11 | ||
12 | #include <linux/types.h> | |
13 | ||
14 | ||
15 | /* | |
16 | * Partition definition structure: | |
61ecfa87 | 17 | * |
1da177e4 LT |
18 | * An array of struct partition is passed along with a MTD object to |
19 | * add_mtd_partitions() to create them. | |
20 | * | |
21 | * For each partition, these fields are available: | |
22 | * name: string that will be used to label the partition's MTD device. | |
61ecfa87 | 23 | * size: the partition size; if defined as MTDPART_SIZ_FULL, the partition |
1da177e4 | 24 | * will extend to the end of the master MTD device. |
61ecfa87 TG |
25 | * offset: absolute starting position within the master MTD device; if |
26 | * defined as MTDPART_OFS_APPEND, the partition will start where the | |
1da177e4 | 27 | * previous one ended; if MTDPART_OFS_NXTBLK, at the next erase block. |
61ecfa87 | 28 | * mask_flags: contains flags that have to be masked (removed) from the |
1da177e4 | 29 | * master MTD flag set for the corresponding MTD partition. |
61ecfa87 | 30 | * For example, to force a read-only partition, simply adding |
1da177e4 LT |
31 | * MTD_WRITEABLE to the mask_flags will do the trick. |
32 | * | |
61ecfa87 | 33 | * Note: writeable partitions require their size and offset be |
1da177e4 | 34 | * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK). |
61ecfa87 | 35 | */ |
1da177e4 LT |
36 | |
37 | struct mtd_partition { | |
38 | char *name; /* identifier string */ | |
69423d99 AH |
39 | uint64_t size; /* partition size */ |
40 | uint64_t offset; /* offset within the master MTD space */ | |
26cdb67c | 41 | uint32_t mask_flags; /* master MTD flags to mask out for this partition */ |
5bd34c09 | 42 | struct nand_ecclayout *ecclayout; /* out of band layout for this partition (NAND only)*/ |
1da177e4 LT |
43 | }; |
44 | ||
45 | #define MTDPART_OFS_NXTBLK (-2) | |
46 | #define MTDPART_OFS_APPEND (-1) | |
47 | #define MTDPART_SIZ_FULL (0) | |
48 | ||
49 | ||
7699ad35 NP |
50 | struct mtd_info; |
51 | ||
1da177e4 LT |
52 | int add_mtd_partitions(struct mtd_info *, const struct mtd_partition *, int); |
53 | int del_mtd_partitions(struct mtd_info *); | |
54 | ||
55 | /* | |
56 | * Functions dealing with the various ways of partitioning the space | |
57 | */ | |
58 | ||
59 | struct mtd_part_parser { | |
60 | struct list_head list; | |
61 | struct module *owner; | |
62 | const char *name; | |
63 | int (*parse_fn)(struct mtd_info *, struct mtd_partition **, unsigned long); | |
64 | }; | |
65 | ||
66 | extern int register_mtd_parser(struct mtd_part_parser *parser); | |
67 | extern int deregister_mtd_parser(struct mtd_part_parser *parser); | |
61ecfa87 | 68 | extern int parse_mtd_partitions(struct mtd_info *master, const char **types, |
1da177e4 LT |
69 | struct mtd_partition **pparts, unsigned long origin); |
70 | ||
71 | #define put_partition_parser(p) do { module_put((p)->owner); } while(0) | |
72 | ||
9a310d21 SW |
73 | struct device; |
74 | struct device_node; | |
75 | ||
76 | int __devinit of_mtd_parse_partitions(struct device *dev, | |
9a310d21 SW |
77 | struct device_node *node, |
78 | struct mtd_partition **pparts); | |
1da177e4 | 79 | |
a4b6d516 DB |
80 | #ifdef CONFIG_MTD_PARTITIONS |
81 | static inline int mtd_has_partitions(void) { return 1; } | |
82 | #else | |
83 | static inline int mtd_has_partitions(void) { return 0; } | |
84 | #endif | |
85 | ||
86 | #ifdef CONFIG_MTD_CMDLINE_PARTS | |
87 | static inline int mtd_has_cmdlinepart(void) { return 1; } | |
88 | #else | |
89 | static inline int mtd_has_cmdlinepart(void) { return 0; } | |
90 | #endif | |
91 | ||
9a310d21 | 92 | #endif |