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/*

 * $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__

struct erase_info_user {

        uint32_t start;

        uint32_t length;

};

struct mtd_oob_buf {

        uint32_t start;

        uint32_t 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_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;

};

#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, loff_t)

#define MEMSETBADBLOCK          _IOW('M', 12, 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 {

        uint32_t useecc;

        uint32_t eccbytes;

        uint32_t oobfree[8][2];

        uint32_t eccpos[32];

};

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[64];

        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;

};

/*

 * 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__ */