1 /*
2 * $Id: mtd-abi.h,v 1.7 2004/11/23 15:37:32 gleixner Exp $
3 *
4 * Portions of MTD ABI definition which are shared by kernel and user space
5 */
6
7 #ifndef __MTD_ABI_H__
8 #define __MTD_ABI_H__
9
10 #ifndef __KERNEL__ /* Urgh. The whole point of splitting this out into
11 separate files was to avoid #ifdef __KERNEL__ */
12 #define __user
13 #endif
14
15 struct erase_info_user {
16 uint32_t start;
17 uint32_t length;
18 };
19
20 struct mtd_oob_buf {
21 uint32_t start;
22 uint32_t length;
23 unsigned char __user *ptr;
24 };
25
26 #define MTD_ABSENT 0
27 #define MTD_RAM 1
28 #define MTD_ROM 2
29 #define MTD_NORFLASH 3
30 #define MTD_NANDFLASH 4
31 #define MTD_PEROM 5
32 #define MTD_OTHER 14
33 #define MTD_UNKNOWN 15
34
35 #define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
36 #define MTD_SET_BITS 2 // Bits can be set
37 #define MTD_ERASEABLE 4 // Has an erase function
38 #define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
39 #define MTD_VOLATILE 16 // Set for RAMs
40 #define MTD_XIP 32 // eXecute-In-Place possible
41 #define MTD_OOB 64 // Out-of-band data (NAND flash)
42 #define MTD_ECC 128 // Device capable of automatic ECC
43 #define MTD_NO_VIRTBLOCKS 256 // Virtual blocks not allowed
44
45 // Some common devices / combinations of capabilities
46 #define MTD_CAP_ROM 0
47 #define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
48 #define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
49 #define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
50 #define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
51
52
53 // Types of automatic ECC/Checksum available
54 #define MTD_ECC_NONE 0 // No automatic ECC available
55 #define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
56 #define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
57
58 /* ECC byte placement */
59 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
60 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
61 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
62 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
63
64 struct mtd_info_user {
65 uint8_t type;
66 uint32_t flags;
67 uint32_t size; // Total size of the MTD
68 uint32_t erasesize;
69 uint32_t oobblock; // Size of OOB blocks (e.g. 512)
70 uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
71 uint32_t ecctype;
72 uint32_t eccsize;
73 };
74
75 struct region_info_user {
76 uint32_t offset; /* At which this region starts,
77 * from the beginning of the MTD */
78 uint32_t erasesize; /* For this region */
79 uint32_t numblocks; /* Number of blocks in this region */
80 uint32_t regionindex;
81 };
82
83 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
84 #define MEMERASE _IOW('M', 2, struct erase_info_user)
85 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
86 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
87 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
88 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
89 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
90 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
91 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
92 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
93 #define MEMGETBADBLOCK _IOW('M', 11, loff_t)
94 #define MEMSETBADBLOCK _IOW('M', 12, loff_t)
95
96 struct nand_oobinfo {
97 uint32_t useecc;
98 uint32_t eccbytes;
99 uint32_t oobfree[8][2];
100 uint32_t eccpos[32];
101 };
102
103 #endif /* __MTD_ABI_H__ */
104
|
This page was automatically generated by the
LXR engine.
|