2 * $Id: mtd-abi.h,v 1.13 2005/11/07 11:14:56 gleixner Exp $
4 * Portions of MTD ABI definition which are shared by kernel and user space
10 #ifndef __KERNEL__ /* Urgh. The whole point of splitting this out into
11 separate files was to avoid #ifdef __KERNEL__ */
15 struct erase_info_user
{
23 unsigned char __user
*ptr
;
29 #define MTD_NORFLASH 3
30 #define MTD_NANDFLASH 4
31 #define MTD_DATAFLASH 6
33 #define MTD_WRITEABLE 0x400 /* Device is writeable */
34 #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
36 // Some common devices / combinations of capabilities
38 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
39 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
40 #define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
43 // Types of automatic ECC/Checksum available
44 #define MTD_ECC_NONE 0 // No automatic ECC available
45 #define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
46 #define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
48 /* ECC byte placement */
49 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
50 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
51 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
52 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
53 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
55 /* OTP mode selection */
57 #define MTD_OTP_FACTORY 1
58 #define MTD_OTP_USER 2
60 struct mtd_info_user
{
63 uint32_t size
; // Total size of the MTD
66 uint32_t oobsize
; // Amount of OOB data per block (e.g. 16)
71 struct region_info_user
{
72 uint32_t offset
; /* At which this region starts,
73 * from the beginning of the MTD */
74 uint32_t erasesize
; /* For this region */
75 uint32_t numblocks
; /* Number of blocks in this region */
85 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
86 #define MEMERASE _IOW('M', 2, struct erase_info_user)
87 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
88 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
89 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
90 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
91 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
92 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
93 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
94 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
95 #define MEMGETBADBLOCK _IOW('M', 11, loff_t)
96 #define MEMSETBADBLOCK _IOW('M', 12, loff_t)
97 #define OTPSELECT _IOR('M', 13, int)
98 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
99 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
100 #define OTPLOCK _IOR('M', 16, struct otp_info)
101 #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
104 * Obsolete legacy interface. Keep it in order not to break userspace
107 struct nand_oobinfo
{
110 uint32_t oobfree
[8][2];
114 struct nand_oobfree
{
119 #define MTD_MAX_OOBFREE_ENTRIES 8
121 * ECC layout control structure. Exported to userspace for
122 * diagnosis and to allow creation of raw images
124 struct nand_ecclayout
{
128 struct nand_oobfree oobfree
[MTD_MAX_OOBFREE_ENTRIES
];
131 #endif /* __MTD_ABI_H__ */