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u-boot/include/mtd/mtd-abi.h
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al.
*
*/
#ifndef __MTD_ABI_H__
#define __MTD_ABI_H__
#ifdef __UBOOT__
#include <linux/compat.h>
#endif
#include <linux/compiler.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;
};
/**
* MTD operation modes
*
* @MTD_OPS_PLACE_OOB: OOB data are placed at the given offset (default)
* @MTD_OPS_AUTO_OOB: OOB data are automatically placed at the free areas
* which are defined by the internal ecclayout
* @MTD_OPS_RAW: data are transferred as-is, with no error correction;
* this mode implies %MTD_OPS_PLACE_OOB
*
* These modes can be passed to ioctl(MEMWRITE) and are also used internally.
* See notes on "MTD file modes" for discussion on %MTD_OPS_RAW vs.
* %MTD_FILE_MODE_RAW.
*/
enum {
MTD_OPS_PLACE_OOB = 0,
MTD_OPS_AUTO_OOB = 1,
MTD_OPS_RAW = 2,
};
/**
* struct mtd_write_req - data structure for requesting a write operation
*
* @start: start address
* @len: length of data buffer
* @ooblen: length of OOB buffer
* @usr_data: user-provided data buffer
* @usr_oob: user-provided OOB buffer
* @mode: MTD mode (see "MTD operation modes")
* @padding: reserved, must be set to 0
*
* This structure supports ioctl(MEMWRITE) operations, allowing data and/or OOB
* writes in various modes. To write to OOB-only, set @usr_data == NULL, and to
* write data-only, set @usr_oob == NULL. However, setting both @usr_data and
* @usr_oob to NULL is not allowed.
*/
struct mtd_write_req {
__u64 start;
__u64 len;
__u64 ooblen;
__u64 usr_data;
__u64 usr_oob;
__u8 mode;
__u8 padding[7];
};
#define MTD_ABSENT 0
#define MTD_RAM 1
#define MTD_ROM 2
#define MTD_NORFLASH 3
#define MTD_NANDFLASH 4 /* SLC NAND */
#define MTD_DATAFLASH 6
#define MTD_UBIVOLUME 7
#define MTD_MLCNANDFLASH 8 /* MLC NAND (including TLC) */
#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)
/* Obsolete ECC byte placement modes (used with obsolete MEMGETOOBSEL) */
#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) */
__u64 padding; /* Old obsolete field; do not use */
};
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.
*/
/* Get basic MTD characteristics info (better to use sysfs) */
#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
/* Erase segment of MTD */
#define MEMERASE _IOW('M', 2, struct erase_info_user)
/* Write out-of-band data from MTD */
#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
/* Read out-of-band data from MTD */
#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
/* Lock a chip (for MTD that supports it) */
#define MEMLOCK _IOW('M', 5, struct erase_info_user)
/* Unlock a chip (for MTD that supports it) */
#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
/* Get the number of different erase regions */
#define MEMGETREGIONCOUNT _IOR('M', 7, int)
/* Get information about the erase region for a specific index */
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
/* Get info about OOB modes (e.g., RAW, PLACE, AUTO) - legacy interface */
#define MEMGETOOBSEL _IOR('M', 10, struct nand_oobinfo)
/* Check if an eraseblock is bad */
#define MEMGETBADBLOCK _IOW('M', 11, __kernel_loff_t)
/* Mark an eraseblock as bad */
#define MEMSETBADBLOCK _IOW('M', 12, __kernel_loff_t)
/* Set OTP (One-Time Programmable) mode (factory vs. user) */
#define OTPSELECT _IOR('M', 13, int)
/* Get number of OTP (One-Time Programmable) regions */
#define OTPGETREGIONCOUNT _IOW('M', 14, int)
/* Get all OTP (One-Time Programmable) info about MTD */
#define OTPGETREGIONINFO _IOW('M', 15, struct otp_info)
/* Lock a given range of user data (must be in mode %MTD_FILE_MODE_OTP_USER) */
#define OTPLOCK _IOR('M', 16, struct otp_info)
/* Get ECC layout (deprecated) */
#define ECCGETLAYOUT _IOR('M', 17, struct nand_ecclayout_user)
/* Get statistics about corrected/uncorrected errors */
#define ECCGETSTATS _IOR('M', 18, struct mtd_ecc_stats)
/* Set MTD mode on a per-file-descriptor basis (see "MTD file modes") */
#define MTDFILEMODE _IO('M', 19)
/* Erase segment of MTD (supports 64-bit address) */
#define MEMERASE64 _IOW('M', 20, struct erase_info_user64)
/* Write data to OOB (64-bit version) */
#define MEMWRITEOOB64 _IOWR('M', 21, struct mtd_oob_buf64)
/* Read data from OOB (64-bit version) */
#define MEMREADOOB64 _IOWR('M', 22, struct mtd_oob_buf64)
/* Check if chip is locked (for MTD that supports it) */
#define MEMISLOCKED _IOR('M', 23, struct erase_info_user)
/*
* Most generic write interface; can write in-band and/or out-of-band in various
* modes (see "struct mtd_write_req"). This ioctl is not supported for flashes
* without OOB, e.g., NOR flash.
*/
#define MEMWRITE _IOWR('M', 24, struct mtd_write_req)
/*
* 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;
};
/*
* MTD file modes - for read/write access to MTD
*
* @MTD_FILE_MODE_NORMAL: OTP disabled, ECC enabled
* @MTD_FILE_MODE_OTP_FACTORY: OTP enabled in factory mode
* @MTD_FILE_MODE_OTP_USER: OTP enabled in user mode
* @MTD_FILE_MODE_RAW: OTP disabled, ECC disabled
*
* These modes can be set via ioctl(MTDFILEMODE). The mode mode will be retained
* separately for each open file descriptor.
*
* Note: %MTD_FILE_MODE_RAW provides the same functionality as %MTD_OPS_RAW -
* raw access to the flash, without error correction or autoplacement schemes.
* Wherever possible, the MTD_OPS_* mode will override the MTD_FILE_MODE_* mode
* (e.g., when using ioctl(MEMWRITE)), but in some cases, the MTD_FILE_MODE is
* used out of necessity (e.g., `write()', ioctl(MEMWRITEOOB64)).
*/
enum mtd_file_modes {
MTD_FILE_MODE_NORMAL = MTD_OTP_OFF,
MTD_FILE_MODE_OTP_FACTORY = MTD_OTP_FACTORY,
MTD_FILE_MODE_OTP_USER = MTD_OTP_USER,
MTD_FILE_MODE_RAW,
};
static inline int mtd_type_is_nand_user(const struct mtd_info_user *mtd)
{
return mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH;
}
#endif /* __MTD_ABI_H__ */
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