2 * $Id: mtd-abi.h,v 1.7 2004/11/23 15:37:32 gleixner Exp $
4 * Portions of MTD ABI definition which are shared by kernel and user space
10 struct erase_info_user {
24 #define MTD_NORFLASH 3
25 #define MTD_NANDFLASH 4
28 #define MTD_UNKNOWN 15
30 #define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
31 #define MTD_SET_BITS 2 // Bits can be set
32 #define MTD_ERASEABLE 4 // Has an erase function
33 #define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
34 #define MTD_VOLATILE 16 // Set for RAMs
35 #define MTD_XIP 32 // eXecute-In-Place possible
36 #define MTD_OOB 64 // Out-of-band data (NAND flash)
37 #define MTD_ECC 128 // Device capable of automatic ECC
38 #define MTD_NO_VIRTBLOCKS 256 // Virtual blocks not allowed
40 // Some common devices / combinations of capabilities
42 #define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
43 #define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
44 #define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
45 #define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
48 // Types of automatic ECC/Checksum available
49 #define MTD_ECC_NONE 0 // No automatic ECC available
50 #define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
51 #define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
53 /* ECC byte placement */
54 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
55 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
56 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
57 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
58 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
60 struct mtd_info_user {
63 uint32_t size; // Total size of the MTD
65 uint32_t oobblock; // Size of OOB blocks (e.g. 512)
66 uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
71 struct region_info_user {
72 uint32_t offset; /* At which this region starts,
73 * from the beginning of the MTD */
74 uint32_t erasesize; /* For this region */
75 uint32_t numblocks; /* Number of blocks in this region */
79 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
80 #define MEMERASE _IOW('M', 2, struct erase_info_user)
81 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
82 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
83 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
84 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
85 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
86 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
87 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
88 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
89 #define MEMGETBADBLOCK _IOW('M', 11, loff_t)
90 #define MEMSETBADBLOCK _IOW('M', 12, loff_t)
95 uint32_t oobfree[8][2];
99 #endif /* __MTD_ABI_H__ */