include/mtd/mtd-abi.h

   1 /*
   2  * Portions of MTD ABI definition which are shared by kernel and user space
   3  */
   4
   5 #ifndef __MTD_ABI_H__
   6 #define __MTD_ABI_H__
   7
   8 #include <linux/types.h>
   9
  10 struct erase_info_user {
  11         __u32 start;
  12         __u32 length;
  13 };
  14
  15 struct erase_info_user64 {
  16         __u64 start;
  17         __u64 length;
  18 };
  19
  20 struct mtd_oob_buf {
  21         __u32 start;
  22         __u32 length;
  23         unsigned char __user *ptr;
  24 };
  25
  26 struct mtd_oob_buf64 {
  27         __u64 start;
  28         __u32 pad;
  29         __u32 length;
  30         __u64 usr_ptr;
  31 };
  32
  33 #define MTD_ABSENT              0
  34 #define MTD_RAM                 1
  35 #define MTD_ROM                 2
  36 #define MTD_NORFLASH            3
  37 #define MTD_NANDFLASH           4
  38 #define MTD_DATAFLASH           6
  39 #define MTD_UBIVOLUME           7
  40
  41 #define MTD_WRITEABLE           0x400   /* Device is writeable */
  42 #define MTD_BIT_WRITEABLE       0x800   /* Single bits can be flipped */
  43 #define MTD_NO_ERASE            0x1000  /* No erase necessary */
  44 #define MTD_POWERUP_LOCK        0x2000  /* Always locked after reset */
  45
  46 // Some common devices / combinations of capabilities
  47 #define MTD_CAP_ROM             0
  48 #define MTD_CAP_RAM             (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
  49 #define MTD_CAP_NORFLASH        (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
  50 #define MTD_CAP_NANDFLASH       (MTD_WRITEABLE)
  51
  52 /* ECC byte placement */
  53 #define MTD_NANDECC_OFF         0       // Switch off ECC (Not recommended)
  54 #define MTD_NANDECC_PLACE       1       // Use the given placement in the structure (YAFFS1 legacy mode)
  55 #define MTD_NANDECC_AUTOPLACE   2       // Use the default placement scheme
  56 #define MTD_NANDECC_PLACEONLY   3       // Use the given placement in the structure (Do not store ecc result on read)
  57 #define MTD_NANDECC_AUTOPL_USR  4       // Use the given autoplacement scheme rather than using the default
  58
  59 /* OTP mode selection */
  60 #define MTD_OTP_OFF             0
  61 #define MTD_OTP_FACTORY         1
  62 #define MTD_OTP_USER            2
  63
  64 struct mtd_info_user {
  65         __u8 type;
  66         __u32 flags;
  67         __u32 size;      // Total size of the MTD
  68         __u32 erasesize;
  69         __u32 writesize;
  70         __u32 oobsize;   // Amount of OOB data per block (e.g. 16)
  71         /* The below two fields are obsolete and broken, do not use them
  72          * (TODO: remove at some point) */
  73         __u32 ecctype;
  74         __u32 eccsize;
  75 };
  76
  77 struct region_info_user {
  78         __u32 offset;           /* At which this region starts,
  79                                          * from the beginning of the MTD */
  80         __u32 erasesize;                /* For this region */
  81         __u32 numblocks;                /* Number of blocks in this region */
  82         __u32 regionindex;
  83 };
  84
  85 struct otp_info {
  86         __u32 start;
  87         __u32 length;
  88         __u32 locked;
  89 };
  90
  91 #define MEMGETINFO              _IOR('M', 1, struct mtd_info_user)
  92 #define MEMERASE                _IOW('M', 2, struct erase_info_user)
  93 #define MEMWRITEOOB             _IOWR('M', 3, struct mtd_oob_buf)
  94 #define MEMREADOOB              _IOWR('M', 4, struct mtd_oob_buf)
  95 #define MEMLOCK                 _IOW('M', 5, struct erase_info_user)
  96 #define MEMUNLOCK               _IOW('M', 6, struct erase_info_user)
  97 #define MEMGETREGIONCOUNT       _IOR('M', 7, int)
  98 #define MEMGETREGIONINFO        _IOWR('M', 8, struct region_info_user)
  99 #define MEMSETOOBSEL            _IOW('M', 9, struct nand_oobinfo)
 100 #define MEMGETOOBSEL            _IOR('M', 10, struct nand_oobinfo)
 101 #define MEMGETBADBLOCK          _IOW('M', 11, __kernel_loff_t)
 102 #define MEMSETBADBLOCK          _IOW('M', 12, __kernel_loff_t)
 103 #define OTPSELECT               _IOR('M', 13, int)
 104 #define OTPGETREGIONCOUNT       _IOW('M', 14, int)
 105 #define OTPGETREGIONINFO        _IOW('M', 15, struct otp_info)
 106 #define OTPLOCK                 _IOR('M', 16, struct otp_info)
 107 #define ECCGETLAYOUT            _IOR('M', 17, struct nand_ecclayout)
 108 #define ECCGETSTATS             _IOR('M', 18, struct mtd_ecc_stats)
 109 #define MTDFILEMODE             _IO('M', 19)
 110 #define MEMERASE64              _IOW('M', 20, struct erase_info_user64)
 111 #define MEMWRITEOOB64           _IOWR('M', 21, struct mtd_oob_buf64)
 112 #define MEMREADOOB64            _IOWR('M', 22, struct mtd_oob_buf64)
 113
 114 /*
 115  * Obsolete legacy interface. Keep it in order not to break userspace
 116  * interfaces
 117  */
 118 struct nand_oobinfo {
 119         __u32 useecc;
 120         __u32 eccbytes;
 121         __u32 oobfree[8][2];
 122         __u32 eccpos[32];
 123 };
 124
 125 struct nand_oobfree {
 126         __u32 offset;
 127         __u32 length;
 128 };
 129
 130 #define MTD_MAX_OOBFREE_ENTRIES 8
 131 /*
 132  * ECC layout control structure. Exported to userspace for
 133  * diagnosis and to allow creation of raw images
 134  */
 135 struct nand_ecclayout {
 136         __u32 eccbytes;
 137         __u32 eccpos[64];
 138         __u32 oobavail;
 139         struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
 140 };
 141
 142 /**
 143  * struct mtd_ecc_stats - error correction stats
 144  *
 145  * @corrected:  number of corrected bits
 146  * @failed:     number of uncorrectable errors
 147  * @badblocks:  number of bad blocks in this partition
 148  * @bbtblocks:  number of blocks reserved for bad block tables
 149  */
 150 struct mtd_ecc_stats {
 151         __u32 corrected;
 152         __u32 failed;
 153         __u32 badblocks;
 154         __u32 bbtblocks;
 155 };
 156
 157 /*
 158  * Read/write file modes for access to MTD
 159  */
 160 enum mtd_file_modes {
 161         MTD_MODE_NORMAL = MTD_OTP_OFF,
 162         MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
 163         MTD_MODE_OTP_USER = MTD_OTP_USER,
 164         MTD_MODE_RAW,
 165 };
 166
 167 #endif /* __MTD_ABI_H__ */