2 * $Id: mtd-abi.h,v 1.13 2005/11/07 11:14:56 gleixner Exp $
4 * Portions of MTD ABI definition which are shared by kernel and user space
11 /* Urgh. The whole point of splitting this out into
12 separate files was to avoid #ifdef __KERNEL__ */
16 struct erase_info_user {
24 unsigned char __user *ptr;
30 #define MTD_NORFLASH 3
31 #define MTD_NANDFLASH 4
33 #define MTD_DATAFLASH 6
35 #define MTD_UNKNOWN 15
37 #define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
38 #define MTD_SET_BITS 2 // Bits can be set
39 #define MTD_ERASEABLE 4 // Has an erase function
40 #define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
41 #define MTD_VOLATILE 16 // Set for RAMs
42 #define MTD_XIP 32 // eXecute-In-Place possible
43 #define MTD_OOB 64 // Out-of-band data (NAND flash)
44 #define MTD_ECC 128 // Device capable of automatic ECC
45 #define MTD_NO_VIRTBLOCKS 256 // Virtual blocks not allowed
46 #define MTD_PROGRAM_REGIONS 512 // Configurable Programming Regions
48 // Some common devices / combinations of capabilities
50 #define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
51 #define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
52 #define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
53 #define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
56 // Types of automatic ECC/Checksum available
57 #define MTD_ECC_NONE 0 // No automatic ECC available
58 #define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
59 #define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
61 /* ECC byte placement */
62 #define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
63 #define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
64 #define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
65 #define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
66 #define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
68 /* OTP mode selection */
70 #define MTD_OTP_FACTORY 1
71 #define MTD_OTP_USER 2
73 struct mtd_info_user {
76 uint32_t size; // Total size of the MTD
78 uint32_t oobblock; // Size of OOB blocks (e.g. 512)
79 uint32_t oobsize; // Amount of OOB data per block (e.g. 16)
84 struct region_info_user {
85 uint32_t offset; /* At which this region starts,
86 * from the beginning of the MTD */
87 uint32_t erasesize; /* For this region */
88 uint32_t numblocks; /* Number of blocks in this region */
98 #define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
99 #define MEMERASE _IOW('M', 2, struct erase_info_user)
100 #define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
101 #define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
102 #define MEMLOCK _IOW('M', 5, struct erase_info_user)
103 #define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
104 #define MEMGETREGIONCOUNT _IOR('M', 7, int)
105 #define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
106 #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
107 #define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
108 #define MEMGETBADBLOCK _IOW('M', 11, loff_t)
109 #define MEMSETBADBLOCK _IOW('M', 12, loff_t)
110 #define OTPSELECT _IOR('M', 13, int)
111 #define OTPGETREGIONCOUNT _IOW('M', 14, int)
112 #define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
113 #define OTPLOCK _IOR('M', 16, struct otp_info)
115 struct nand_oobinfo {
118 uint32_t oobfree[8][2];
122 #endif /* __MTD_ABI_H__ */