]>
Commit | Line | Data |
---|---|---|
7e6ee7ad KP |
1 | /* |
2 | * MTD partitioning layer definitions | |
3 | * | |
ff94bc40 | 4 | * (C) 2000 Nicolas Pitre <nico@fluxnic.net> |
7e6ee7ad KP |
5 | * |
6 | * This code is GPL | |
7e6ee7ad KP |
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: | |
17 | * | |
18 | * An array of struct partition is passed along with a MTD object to | |
ff94bc40 | 19 | * mtd_device_register() to create them. |
7e6ee7ad KP |
20 | * |
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 | |
ff94bc40 HS |
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. | |
7e6ee7ad KP |
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. | |
34 | * | |
35 | * Note: writeable partitions require their size and offset be | |
36 | * erasesize aligned (e.g. use MTDPART_OFS_NEXTBLK). | |
37 | */ | |
38 | ||
39 | struct mtd_partition { | |
ff94bc40 | 40 | const char *name; /* identifier string */ |
aaa8eec5 SP |
41 | uint64_t size; /* partition size */ |
42 | uint64_t offset; /* offset within the master MTD space */ | |
ff94bc40 HS |
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) */ | |
7e6ee7ad KP |
45 | }; |
46 | ||
ff94bc40 | 47 | #define MTDPART_OFS_RETAIN (-3) |
7e6ee7ad KP |
48 | #define MTDPART_OFS_NXTBLK (-2) |
49 | #define MTDPART_OFS_APPEND (-1) | |
50 | #define MTDPART_SIZ_FULL (0) | |
51 | ||
52 | ||
ff94bc40 HS |
53 | struct mtd_info; |
54 | struct device_node; | |
55 | ||
56 | #ifndef __UBOOT__ | |
57 | /** | |
58 | * struct mtd_part_parser_data - used to pass data to MTD partition parsers. | |
59 | * @origin: for RedBoot, start address of MTD device | |
60 | * @of_node: for OF parsers, device node containing partitioning information | |
61 | */ | |
62 | struct mtd_part_parser_data { | |
63 | unsigned long origin; | |
64 | struct device_node *of_node; | |
65 | }; | |
66 | ||
7e6ee7ad | 67 | |
7e6ee7ad KP |
68 | /* |
69 | * Functions dealing with the various ways of partitioning the space | |
70 | */ | |
71 | ||
72 | struct mtd_part_parser { | |
73 | struct list_head list; | |
74 | struct module *owner; | |
75 | const char *name; | |
ff94bc40 HS |
76 | int (*parse_fn)(struct mtd_info *, struct mtd_partition **, |
77 | struct mtd_part_parser_data *); | |
7e6ee7ad KP |
78 | }; |
79 | ||
ff94bc40 HS |
80 | extern void register_mtd_parser(struct mtd_part_parser *parser); |
81 | extern void deregister_mtd_parser(struct mtd_part_parser *parser); | |
7e6ee7ad KP |
82 | #endif |
83 | ||
ff94bc40 HS |
84 | int mtd_is_partition(const struct mtd_info *mtd); |
85 | int mtd_add_partition(struct mtd_info *master, const char *name, | |
86 | long long offset, long long length); | |
87 | int mtd_del_partition(struct mtd_info *master, int partno); | |
88 | uint64_t mtd_get_device_size(const struct mtd_info *mtd); | |
89 | ||
7e6ee7ad | 90 | #endif |