mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-13 23:34:05 +08:00
0dc54e9f33
New MEMERASE/MEMREADOOB/MEMWRITEOOB ioctls are needed in order to support 64-bit offsets into large NAND flash devices. Signed-off-by: Kevin Cernekee <kpc.mtd@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
159 lines
4.3 KiB
C
159 lines
4.3 KiB
C
/*
|
|
* Portions of MTD ABI definition which are shared by kernel and user space
|
|
*/
|
|
|
|
#ifndef __MTD_ABI_H__
|
|
#define __MTD_ABI_H__
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct erase_info_user {
|
|
__u32 start;
|
|
__u32 length;
|
|
};
|
|
|
|
struct erase_info_user64 {
|
|
__u64 start;
|
|
__u64 length;
|
|
};
|
|
|
|
struct mtd_oob_buf {
|
|
__u32 start;
|
|
__u32 length;
|
|
unsigned char __user *ptr;
|
|
};
|
|
|
|
#define MTD_ABSENT 0
|
|
#define MTD_RAM 1
|
|
#define MTD_ROM 2
|
|
#define MTD_NORFLASH 3
|
|
#define MTD_NANDFLASH 4
|
|
#define MTD_DATAFLASH 6
|
|
#define MTD_UBIVOLUME 7
|
|
|
|
#define MTD_WRITEABLE 0x400 /* Device is writeable */
|
|
#define MTD_BIT_WRITEABLE 0x800 /* Single bits can be flipped */
|
|
#define MTD_NO_ERASE 0x1000 /* No erase necessary */
|
|
#define MTD_POWERUP_LOCK 0x2000 /* Always locked after reset */
|
|
|
|
// Some common devices / combinations of capabilities
|
|
#define MTD_CAP_ROM 0
|
|
#define MTD_CAP_RAM (MTD_WRITEABLE | MTD_BIT_WRITEABLE | MTD_NO_ERASE)
|
|
#define MTD_CAP_NORFLASH (MTD_WRITEABLE | MTD_BIT_WRITEABLE)
|
|
#define MTD_CAP_NANDFLASH (MTD_WRITEABLE)
|
|
|
|
/* ECC byte placement */
|
|
#define MTD_NANDECC_OFF 0 // Switch off ECC (Not recommended)
|
|
#define MTD_NANDECC_PLACE 1 // Use the given placement in the structure (YAFFS1 legacy mode)
|
|
#define MTD_NANDECC_AUTOPLACE 2 // Use the default placement scheme
|
|
#define MTD_NANDECC_PLACEONLY 3 // Use the given placement in the structure (Do not store ecc result on read)
|
|
#define MTD_NANDECC_AUTOPL_USR 4 // Use the given autoplacement scheme rather than using the default
|
|
|
|
/* OTP mode selection */
|
|
#define MTD_OTP_OFF 0
|
|
#define MTD_OTP_FACTORY 1
|
|
#define MTD_OTP_USER 2
|
|
|
|
struct mtd_info_user {
|
|
__u8 type;
|
|
__u32 flags;
|
|
__u32 size; // Total size of the MTD
|
|
__u32 erasesize;
|
|
__u32 writesize;
|
|
__u32 oobsize; // Amount of OOB data per block (e.g. 16)
|
|
/* The below two fields are obsolete and broken, do not use them
|
|
* (TODO: remove at some point) */
|
|
__u32 ecctype;
|
|
__u32 eccsize;
|
|
};
|
|
|
|
struct region_info_user {
|
|
__u32 offset; /* At which this region starts,
|
|
* from the beginning of the MTD */
|
|
__u32 erasesize; /* For this region */
|
|
__u32 numblocks; /* Number of blocks in this region */
|
|
__u32 regionindex;
|
|
};
|
|
|
|
struct otp_info {
|
|
__u32 start;
|
|
__u32 length;
|
|
__u32 locked;
|
|
};
|
|
|
|
#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
|
|
#define MEMERASE _IOW('M', 2, struct erase_info_user)
|
|
#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
|
|
#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
|
|
#define MEMLOCK _IOW('M', 5, struct erase_info_user)
|
|
#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
|
|
#define MEMGETREGIONCOUNT _IOR('M', 7, int)
|
|
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
|
|
#define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
|
|
#define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
|
|
#define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
|
|
#define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
|
|
#define OTPSELECT _IOR('M', 13, int)
|
|
#define OTPGETREGIONCOUNT _IOW('M', 14, int)
|
|
#define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
|
|
#define OTPLOCK _IOR('M', 16, struct otp_info)
|
|
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout)
|
|
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
|
|
#define MTDFILEMODE _IO('M', 19)
|
|
#define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
|
|
|
|
/*
|
|
* Obsolete legacy interface. Keep it in order not to break userspace
|
|
* interfaces
|
|
*/
|
|
struct nand_oobinfo {
|
|
__u32 useecc;
|
|
__u32 eccbytes;
|
|
__u32 oobfree[8][2];
|
|
__u32 eccpos[32];
|
|
};
|
|
|
|
struct nand_oobfree {
|
|
__u32 offset;
|
|
__u32 length;
|
|
};
|
|
|
|
#define MTD_MAX_OOBFREE_ENTRIES 8
|
|
/*
|
|
* ECC layout control structure. Exported to userspace for
|
|
* diagnosis and to allow creation of raw images
|
|
*/
|
|
struct nand_ecclayout {
|
|
__u32 eccbytes;
|
|
__u32 eccpos[64];
|
|
__u32 oobavail;
|
|
struct nand_oobfree oobfree[MTD_MAX_OOBFREE_ENTRIES];
|
|
};
|
|
|
|
/**
|
|
* struct mtd_ecc_stats - error correction stats
|
|
*
|
|
* @corrected: number of corrected bits
|
|
* @failed: number of uncorrectable errors
|
|
* @badblocks: number of bad blocks in this partition
|
|
* @bbtblocks: number of blocks reserved for bad block tables
|
|
*/
|
|
struct mtd_ecc_stats {
|
|
__u32 corrected;
|
|
__u32 failed;
|
|
__u32 badblocks;
|
|
__u32 bbtblocks;
|
|
};
|
|
|
|
/*
|
|
* Read/write file modes for access to MTD
|
|
*/
|
|
enum mtd_file_modes {
|
|
MTD_MODE_NORMAL = MTD_OTP_OFF,
|
|
MTD_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
|
|
MTD_MODE_OTP_USER = MTD_OTP_USER,
|
|
MTD_MODE_RAW,
|
|
};
|
|
|
|
#endif /* __MTD_ABI_H__ */
|