/* * Portions of MTD ABI definition which are shared by kernel and user space */ #ifndef __MTD_ABI_H__ #define __MTD_ABI_H__ #include <linux/types.h> struct erase_info_user { __u32 start; __u32 length; }; struct mtd_oob_buf { __u32 start; __u32 length; unsigned char __user *ptr; }; #define MTD_ABSENT 0 #define MTD_RAM 1 #define MTD_ROM 2 #define MTD_NORFLASH 3 #define MTD_NANDFLASH 4 #define MTD_DATAFLASH 6 #define MTD_UBIVOLUME 7 #define MTD_WRITEABLE 0x400 /* Device is writeable */ #define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */ #define MTD_NO_ERASE 0x1000 /* No erase necessary */ #define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */ // Some common devices / combinations of capabilities #define MTD_CAP_ROM 0 #define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE) #define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE) #define MTD_CAP_NANDFLASH (MTD_WRITEABLE) /* ECC byte placement */ #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended) #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode) #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read) #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default /* OTP mode selection */ #define MTD_OTP_OFF 0 #define MTD_OTP_FACTORY 1 #define MTD_OTP_USER 2 struct mtd_info_user { __u8 type; __u32 flags; __u32 size; // Total size of the MTD __u32 erasesize; __u32 writesize; __u32 oobsize; // Amount of OOB data per block (e.g. 16) /* The below two fields are obsolete and broken, do not use them * (TODO: remove at some point) */ __u32 ecctype; __u32 eccsize; }; struct region_info_user { __u32 offset; /* At which this region starts, * from the beginning of the MTD */ __u32 erasesize; /* For this region */ __u32 numblocks; /* Number of blocks in this region */ __u32 regionindex; }; struct otp_info { __u32 start; __u32 length; __u32 locked; }; #define MEMGETINFO _IOR('M', 1, struct mtd_info_user) #define MEMERASE _IOW('M', 2, struct erase_info_user) #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf) #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf) #define MEMLOCK _IOW('M', 5, struct erase_info_user) #define MEMUNLOCK _IOW('M', 6, struct erase_info_user) #define MEMGETREGIONCOUNT _IOR('M', 7, int) #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user) #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo) #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo) #define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t) #define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t) #define OTPSELECT _IOR('M', 13, int) #define OTPGETREGIONCOUNT _IOW('M', 14, int) #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info) #define OTPLOCK _IOR('M', 16, struct otp_info) #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout) #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats) #define MTDFILEMODE _IO('M', 19) /* * Obsolete legacy interface. Keep it in order not to break userspace * interfaces */ struct nand_oobinfo { __u32 useecc; __u32 eccbytes; __u32 oobfree[8][2]; __u32 eccpos[32]; }; struct nand_oobfree { __u32 offset; __u32 length; }; #define MTD_MAX_OOBFREE_ENTRIES 8 /* * ECC layout control structure. Exported to userspace for * diagnosis and to allow creation of raw images */ struct nand_ecclayout { __u32 eccbytes; __u32 eccpos[64]; __u32 oobavail; struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES]; }; /** * struct mtd_ecc_stats - error correction stats * * @corrected: number of corrected bits * @failed: number of uncorrectable errors * @badblocks: number of bad blocks in this partition * @bbtblocks: number of blocks reserved for bad block tables */ struct mtd_ecc_stats { __u32 corrected; __u32 failed; __u32 badblocks; __u32 bbtblocks; }; /* * Read/write file modes for access to MTD */ enum mtd_file_modes { MTD_MODE_NORMAL = MTD_OTP_OFF, MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY, MTD_MODE_OTP_USER = MTD_OTP_USER, MTD_MODE_RAW, }; #endif /* __MTD_ABI_H__ */