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 #include <linux/mtd/compat.h>
14 struct erase_info_user {
22 unsigned char __user *ptr;
28 #define MTD_NORFLASH 3
29 #define MTD_NANDFLASH 4
30 #define MTD_DATAFLASH 6
31 #define MTD_UBIVOLUME 7
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 */
38 /* Some common devices / combinations of capabilities */
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)
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 */
51 /* OTP mode selection */
53 #define MTD_OTP_FACTORY 1
54 #define MTD_OTP_USER 2
56 struct mtd_info_user {
59 uint32_t size; /* Total size of the MTD */
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) */
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 */
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)
104 * Obsolete legacy interface. Keep it in order not to break userspace
107 struct nand_oobinfo {
110 uint32_t oobfree[8][2];
114 struct nand_oobfree {
119 #define MTD_MAX_OOBFREE_ENTRIES 8
121 * ECC layout control structure. Exported to userspace for
122 * diagnosis and to allow creation of raw images
124 struct nand_ecclayout {
126 uint32_t eccpos[128];
128 struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
132 * struct mtd_ecc_stats - error correction stats
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
139 struct mtd_ecc_stats {
147 * Read/write file modes for access to MTD
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,
156 #endif /* __MTD_ABI_H__ */