include/linux/mtd/mtd-abi.h

   1 /*
   2  * $Id: mtd-abi.h,v 1.13 2005/11/07 11:14:56 gleixner Exp $
   3  *
   4  * Portions of MTD ABI definition which are shared by kernel and user space
   5  */
   6
   7 #ifndef __MTD_ABI_H__
   8 #define __MTD_ABI_H__
   9
  10 #if 1
  11 #include <linux/mtd/compat.h>
  12 #endif
  13
  14 struct erase_info_user {
  15         uint32_t start;
  16         uint32_t length;
  17 };
  18
  19 struct mtd_oob_buf {
  20         uint32_t start;
  21         uint32_t length;
  22         unsigned char __user *ptr;
  23 };
  24
  25 #define MTD_ABSENT              0
  26 #define MTD_RAM                 1
  27 #define MTD_ROM                 2
  28 #define MTD_NORFLASH            3
  29 #define MTD_NANDFLASH           4
  30 #define MTD_DATAFLASH           6
  31 #define MTD_UBIVOLUME           7
  32
  33 #define MTD_WRITEABLE           0x400   /* Device is writeable */
  34 #define MTD_BIT_WRITEABLE       0x800   /* Single bits can be flipped */
  35 #define MTD_NO_ERASE            0x1000  /* No erase necessary */
  36 #define MTD_STUPID_LOCK         0x2000  /* Always locked after reset */
  37
  38 /* Some common devices / combinations of capabilities */
  39 #define MTD_CAP_ROM             0
  40 #define MTD_CAP_RAM             (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
  41 #define MTD_CAP_NORFLASH        (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
  42 #define MTD_CAP_NANDFLASH       (MTD_WRITEABLE)
  43
  44 /* ECC byte placement */
  45 #define MTD_NANDECC_OFF         0       /* Switch off ECC (Not recommended) */
  46 #define MTD_NANDECC_PLACE       1       /* Use the given placement in the structure (YAFFS1 legacy mode) */
  47 #define MTD_NANDECC_AUTOPLACE   2       /* Use the default placement scheme */
  48 #define MTD_NANDECC_PLACEONLY   3       /* Use the given placement in the structure (Do not store ecc result on read) */
  49 #define MTD_NANDECC_AUTOPL_USR  4       /* Use the given autoplacement scheme rather than using the default */
  50
  51 /* OTP mode selection */
  52 #define MTD_OTP_OFF             0
  53 #define MTD_OTP_FACTORY         1
  54 #define MTD_OTP_USER            2
  55
  56 struct mtd_info_user {
  57         uint8_t type;
  58         uint32_t flags;
  59         uint32_t size;                  /* Total size of the MTD */
  60         uint32_t erasesize;
  61         uint32_t writesize;
  62         uint32_t oobsize;               /* Amount of OOB data per block (e.g. 16) */
  63         /* The below two fields are obsolete and broken, do not use them
  64          * (TODO: remove at some point) */
  65         uint32_t ecctype;
  66         uint32_t eccsize;
  67 };
  68
  69 struct region_info_user {
  70         uint32_t offset;                /* At which this region starts,
  71                                          * from the beginning of the MTD */
  72         uint32_t erasesize;             /* For this region */
  73         uint32_t numblocks;             /* Number of blocks in this region */
  74         uint32_t regionindex;
  75 };
  76
  77 struct otp_info {
  78         uint32_t start;
  79         uint32_t length;
  80         uint32_t locked;
  81 };
  82
  83 #define MEMGETINFO              _IOR('M', 1, struct mtd_info_user)
  84 #define MEMERASE                _IOW('M', 2, struct erase_info_user)
  85 #define MEMWRITEOOB             _IOWR('M', 3, struct mtd_oob_buf)
  86 #define MEMREADOOB              _IOWR('M', 4, struct mtd_oob_buf)
  87 #define MEMLOCK                 _IOW('M', 5, struct erase_info_user)
  88 #define MEMUNLOCK               _IOW('M', 6, struct erase_info_user)
  89 #define MEMGETREGIONCOUNT       _IOR('M', 7, int)
  90 #define MEMGETREGIONINFO        _IOWR('M', 8, struct region_info_user)
  91 #define MEMSETOOBSEL            _IOW('M', 9, struct nand_oobinfo)
  92 #define MEMGETOOBSEL            _IOR('M', 10, struct nand_oobinfo)
  93 #define MEMGETBADBLOCK          _IOW('M', 11, loff_t)
  94 #define MEMSETBADBLOCK          _IOW('M', 12, loff_t)
  95 #define OTPSELECT               _IOR('M', 13, int)
  96 #define OTPGETREGIONCOUNT       _IOW('M', 14, int)
  97 #define OTPGETREGIONINFO        _IOW('M', 15, struct otp_info)
  98 #define OTPLOCK                 _IOR('M', 16, struct otp_info)
  99 #define ECCGETLAYOUT            _IOR('M', 17, struct nand_ecclayout)
 100 #define ECCGETSTATS             _IOR('M', 18, struct mtd_ecc_stats)
 101 #define MTDFILEMODE             _IO('M', 19)
 102
 103 /*
 104  * Obsolete legacy interface. Keep it in order not to break userspace
 105  * interfaces
 106  */
 107 struct nand_oobinfo {
 108         uint32_t useecc;
 109         uint32_t eccbytes;
 110         uint32_t oobfree[8][2];
 111         uint32_t eccpos[48];
 112 };
 113
 114 struct nand_oobfree {
 115         uint32_t offset;
 116         uint32_t length;
 117 };
 118
 119 #define MTD_MAX_OOBFREE_ENTRIES 8
 120 /*
 121  * ECC layout control structure. Exported to userspace for
 122  * diagnosis and to allow creation of raw images
 123  */
 124 struct nand_ecclayout {
 125         uint32_t eccbytes;
 126         uint32_t eccpos[64];
 127         uint32_t oobavail;
 128         struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
 129 };
 130
 131 /**
 132  * struct mtd_ecc_stats - error correction stats
 133  *
 134  * @corrected:  number of corrected bits
 135  * @failed:     number of uncorrectable errors
 136  * @badblocks:  number of bad blocks in this partition
 137  * @bbtblocks:  number of blocks reserved for bad block tables
 138  */
 139 struct mtd_ecc_stats {
 140         uint32_t corrected;
 141         uint32_t failed;
 142         uint32_t badblocks;
 143         uint32_t bbtblocks;
 144 };
 145
 146 /*
 147  * Read/write file modes for access to MTD
 148  */
 149 enum mtd_file_modes {
 150         MTD_MODE_NORMAL = MTD_OTP_OFF,
 151         MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
 152         MTD_MODE_OTP_USER = MTD_OTP_USER,
 153         MTD_MODE_RAW,
 154 };
 155
 156 #endif /* __MTD_ABI_H__ */