2 * Portions of MTD ABI definition which are shared by kernel and user space
8 #include <linux/types.h>
10 struct erase_info_user {
15 struct erase_info_user64 {
23 unsigned char __user *ptr;
29 #define MTD_NORFLASH 3
30 #define MTD_NANDFLASH 4
31 #define MTD_DATAFLASH 6
32 #define MTD_UBIVOLUME 7
34 #define MTD_WRITEABLE 0x400 /* Device is writeable */
35 #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
36 #define MTD_NO_ERASE 0x1000 /* No erase necessary */
37 #define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
39 // Some common devices / combinations of capabilities
41 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
42 #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
43 #define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
45 /* ECC byte placement */
46 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
47 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
48 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
49 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
50 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
52 /* OTP mode selection */
54 #define MTD_OTP_FACTORY 1
55 #define MTD_OTP_USER 2
57 struct mtd_info_user {
60 __u32 size; // Total size of the MTD
63 __u32 oobsize; // Amount of OOB data per block (e.g. 16)
64 /* The below two fields are obsolete and broken, do not use them
65 * (TODO: remove at some point) */
70 struct region_info_user {
71 __u32 offset; /* At which this region starts,
72 * from the beginning of the MTD */
73 __u32 erasesize; /* For this region */
74 __u32 numblocks; /* Number of blocks in this region */
84 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
85 #define MEMERASE _IOW('M', 2, struct erase_info_user)
86 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
87 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
88 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
89 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
90 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
91 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
92 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
93 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
94 #define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
95 #define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
96 #define OTPSELECT _IOR('M', 13, int)
97 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
98 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
99 #define OTPLOCK _IOR('M', 16, struct otp_info)
100 #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
101 #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
102 #define MTDFILEMODE _IO('M', 19)
103 #define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
106 * Obsolete legacy interface. Keep it in order not to break userspace
109 struct nand_oobinfo {
116 struct nand_oobfree {
121 #define MTD_MAX_OOBFREE_ENTRIES 8
123 * ECC layout control structure. Exported to userspace for
124 * diagnosis and to allow creation of raw images
126 struct nand_ecclayout {
130 struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
134 * struct mtd_ecc_stats - error correction stats
136 * @corrected: number of corrected bits
137 * @failed: number of uncorrectable errors
138 * @badblocks: number of bad blocks in this partition
139 * @bbtblocks: number of blocks reserved for bad block tables
141 struct mtd_ecc_stats {
149 * Read/write file modes for access to MTD
151 enum mtd_file_modes {
152 MTD_MODE_NORMAL = MTD_OTP_OFF,
153 MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
154 MTD_MODE_OTP_USER = MTD_OTP_USER,
158 #endif /* __MTD_ABI_H__ */