/* * $Id: mtd-abi.h,v 1.13 2005/11/07 11:14:56 gleixner Exp $ * * Portions of MTD ABI definition which are shared by kernel and user space */ #ifndef __MTD_ABI_H__ #define __MTD_ABI_H__ #if 1 #include #endif #include struct erase_info_user { uint32_t start; uint32_t length; }; struct mtd_oob_buf { uint32_t start; uint32_t length; unsigned char __user *ptr; }; /* * MTD operation modes * * @MTD_OPS_PLACE_OOB: OOB data are placed at the given offset (default) * @MTD_OPS_AUTO_OOB: OOB data are automatically placed at the free areas * which are defined by the internal ecclayout * @MTD_OPS_RAW: data are transferred as-is, with no error correction; * this mode implies %MTD_OPS_PLACE_OOB * * These modes can be passed to ioctl(MEMWRITE) and are also used internally. * See notes on "MTD file modes" for discussion on %MTD_OPS_RAW vs. * %MTD_FILE_MODE_RAW. */ enum { MTD_OPS_PLACE_OOB = 0, MTD_OPS_AUTO_OOB = 1, MTD_OPS_RAW = 2, }; #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_STUPID_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 { uint8_t type; uint32_t flags; uint32_t size; /* Total size of the MTD */ uint32_t erasesize; uint32_t writesize; uint32_t 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) */ uint32_t ecctype; uint32_t eccsize; }; struct region_info_user { uint32_t offset; /* At which this region starts, * from the beginning of the MTD */ uint32_t erasesize; /* For this region */ uint32_t numblocks; /* Number of blocks in this region */ uint32_t regionindex; }; struct otp_info { uint32_t start; uint32_t length; uint32_t locked; }; /* Get basic MTD characteristics info (better to use sysfs) */ #define MEMGETINFO _IOR('M', 1, struct mtd_info_user) /* Erase segment of MTD */ #define MEMERASE _IOW('M', 2, struct erase_info_user) /* Write out-of-band data from MTD */ #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf) /* Read out-of-band data from MTD */ #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf) /* Lock a chip (for MTD that supports it) */ #define MEMLOCK _IOW('M', 5, struct erase_info_user) /* Unlock a chip (for MTD that supports it) */ #define MEMUNLOCK _IOW('M', 6, struct erase_info_user) /* Get the number of different erase regions */ #define MEMGETREGIONCOUNT _IOR('M', 7, int) /* Get information about the erase region for a specific index */ #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user) /* Get info about OOB modes (e.g., RAW, PLACE, AUTO) - legacy interface */ #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo) #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo) /* Check if an eraseblock is bad */ #define MEMGETBADBLOCK _IOW('M', 11, loff_t) /* Mark an eraseblock as bad */ #define MEMSETBADBLOCK _IOW('M', 12, loff_t) /* Set OTP (One-Time Programmable) mode (factory vs. user) */ #define OTPSELECT _IOR('M', 13, int) /* Get number of OTP (One-Time Programmable) regions */ #define OTPGETREGIONCOUNT _IOW('M', 14, int) /* Get all OTP (One-Time Programmable) info about MTD */ #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info) /* Lock a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */ #define OTPLOCK _IOR('M', 16, struct otp_info) /* Get ECC layout (deprecated) */ #define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout) /* Get statistics about corrected/uncorrected errors */ #define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats) /* Set MTD mode on a per-file-descriptor basis (see "MTD file modes") */ #define MTDFILEMODE _IO('M', 19) /* * Obsolete legacy interface. Keep it in order not to break userspace * interfaces */ struct nand_oobinfo { uint32_t useecc; uint32_t eccbytes; uint32_t oobfree[8][2]; uint32_t eccpos[48]; }; struct nand_oobfree { uint32_t offset; uint32_t 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 { uint32_t eccbytes; uint32_t eccpos[128]; uint32_t 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 { uint32_t corrected; uint32_t failed; uint32_t badblocks; uint32_t bbtblocks; }; /* * MTD file modes - for read/write access to MTD * * @MTD_FILE_MODE_NORMAL: OTP disabled, ECC enabled * @MTD_FILE_MODE_OTP_FACTORY: OTP enabled in factory mode * @MTD_FILE_MODE_OTP_USER: OTP enabled in user mode * @MTD_FILE_MODE_RAW: OTP disabled, ECC disabled * * These modes can be set via ioctl(MTDFILEMODE). The mode mode will be retained * separately for each open file descriptor. * * Note: %MTD_FILE_MODE_RAW provides the same functionality as %MTD_OPS_RAW - * raw access to the flash, without error correction or autoplacement schemes. * Wherever possible, the MTD_OPS_* mode will override the MTD_FILE_MODE_* mode * (e.g., when using ioctl(MEMWRITE)), but in some cases, the MTD_FILE_MODE is * used out of necessity (e.g., `write()', ioctl(MEMWRITEOOB64)). */ 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__ */