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/*
* Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#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;
};
struct mtd_oob_buf64 {
__u64 start;
__u32 pad;
__u32 length;
__u64 usr_ptr;
};
/*
* oob operation modes
*
* MTD_OOB_PLACE: oob data are placed at the given offset (default)
* MTD_OOB_AUTO: oob data are automatically placed at the free areas
* which are defined by the internal ecclayout
* MTD_OOB_RAW: mode to read or write oob and data without doing ECC
* checking
*/
enum {
MTD_OOB_PLACE = 0,
MTD_OOB_AUTO = 1,
MTD_OOB_RAW = 2,
};
#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_MLCNANDFLASH 8
#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;
};
/*
* Note, the following ioctl existed in the past and was removed:
* #define MEMSETOOBSEL _IOW('M', 9, struct nand_oobinfo)
* Try to avoid adding a new ioctl with the same ioctl number.
*/
#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 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_user)
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
#define MTDFILEMODE _IO('M', 19)
#define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
#define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64)
#define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64)
#define MEMISLOCKED _IOR('M', 23, struct erase_info_user)
/*
* 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
#define MTD_MAX_ECCPOS_ENTRIES 64
/*
* OBSOLETE: ECC layout control structure. Exported to user-space via ioctl
* ECCGETLAYOUT for backwards compatbility and should not be mistaken as a
* complete set of ECC information. The ioctl truncates the larger internal
* structure to retain binary compatibility with the static declaration of the
* ioctl. Note that the "MTD_MAX_..._ENTRIES" macros represent the max size of
* the user struct, not the MAX size of the internal struct nand_ecclayout.
*/
struct nand_ecclayout_user {
__u32 eccbytes;
__u32 eccpos[MTD_MAX_ECCPOS_ENTRIES];
__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__ */
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