2 * Portions of MTD ABI definition which are shared by kernel and user space
8 struct erase_info_user
{
16 unsigned char __user
*ptr
;
22 #define MTD_NORFLASH 3
23 #define MTD_NANDFLASH 4
24 #define MTD_DATAFLASH 6
25 #define MTD_UBIVOLUME 7
27 #define MTD_WRITEABLE 0x400 /* Device is writeable */
28 #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
29 #define MTD_NO_ERASE 0x1000 /* No erase necessary */
30 #define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
32 // Some common devices / combinations of capabilities
34 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
35 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
36 #define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
38 /* ECC byte placement */
39 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
40 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
41 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
42 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
43 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
45 /* OTP mode selection */
47 #define MTD_OTP_FACTORY 1
48 #define MTD_OTP_USER 2
50 struct mtd_info_user
{
53 uint32_t size
; // Total size of the MTD
56 uint32_t oobsize
; // Amount of OOB data per block (e.g. 16)
57 /* The below two fields are obsolete and broken, do not use them
58 * (TODO: remove at some point) */
63 struct region_info_user
{
64 uint32_t offset
; /* At which this region starts,
65 * from the beginning of the MTD */
66 uint32_t erasesize
; /* For this region */
67 uint32_t numblocks
; /* Number of blocks in this region */
77 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
78 #define MEMERASE _IOW('M', 2, struct erase_info_user)
79 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
80 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
81 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
82 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
83 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
84 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
85 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
86 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
87 #define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
88 #define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
89 #define OTPSELECT _IOR('M', 13, int)
90 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
91 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
92 #define OTPLOCK _IOR('M', 16, struct otp_info)
93 #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
94 #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
95 #define MTDFILEMODE _IO('M', 19)
98 * Obsolete legacy interface. Keep it in order not to break userspace
101 struct nand_oobinfo
{
104 uint32_t oobfree
[8][2];
108 struct nand_oobfree
{
113 #define MTD_MAX_OOBFREE_ENTRIES 8
115 * ECC layout control structure. Exported to userspace for
116 * diagnosis and to allow creation of raw images
118 struct nand_ecclayout
{
122 struct nand_oobfree oobfree
[MTD_MAX_OOBFREE_ENTRIES
];
126 * struct mtd_ecc_stats - error correction stats
128 * @corrected: number of corrected bits
129 * @failed: number of uncorrectable errors
130 * @badblocks: number of bad blocks in this partition
131 * @bbtblocks: number of blocks reserved for bad block tables
133 struct mtd_ecc_stats
{
141 * Read/write file modes for access to MTD
143 enum mtd_file_modes
{
144 MTD_MODE_NORMAL
= MTD_OTP_OFF
,
145 MTD_MODE_OTP_FACTORY
= MTD_OTP_FACTORY
,
146 MTD_MODE_OTP_USER
= MTD_OTP_USER
,
150 #endif /* __MTD_ABI_H__ */