2012-12-17 15:48:32 +00:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2008, 2009 Nokia Corporation
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
* Author: Artem Bityutskiy
|
|
|
|
*
|
|
|
|
* MTD library.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef __LIBMTD_H__
|
|
|
|
#define __LIBMTD_H__
|
|
|
|
|
|
|
|
/* Maximum MTD device name length */
|
|
|
|
#define MTD_NAME_MAX 127
|
|
|
|
/* Maximum MTD device type string length */
|
|
|
|
#define MTD_TYPE_MAX 64
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct mtd_dev_info - information about an MTD device.
|
|
|
|
* @node: node pointing to device
|
|
|
|
* @type: flash type (constants like %MTD_NANDFLASH defined in mtd-abi.h)
|
|
|
|
* @type_str: static R/O flash type string
|
|
|
|
* @name: device name
|
|
|
|
* @size: device size in bytes
|
|
|
|
* @eb_cnt: count of eraseblocks
|
|
|
|
* @eb_size: eraseblock size
|
|
|
|
* @min_io_size: minimum input/output unit size
|
|
|
|
* @subpage_size: sub-page size
|
|
|
|
* @oob_size: OOB size (zero if the device does not have OOB area)
|
|
|
|
* @region_cnt: count of additional erase regions
|
|
|
|
* @writable: zero if the device is read-only
|
|
|
|
* @bb_allowed: non-zero if the MTD device may have bad eraseblocks
|
|
|
|
*/
|
|
|
|
struct mtd_dev_info
|
|
|
|
{
|
|
|
|
const char *node;
|
|
|
|
int type;
|
|
|
|
const char type_str[MTD_TYPE_MAX + 1];
|
|
|
|
long long size;
|
|
|
|
int eb_cnt;
|
|
|
|
int eb_size;
|
|
|
|
int min_io_size;
|
|
|
|
int subpage_size;
|
|
|
|
int oob_size;
|
|
|
|
int region_cnt;
|
|
|
|
unsigned int writable:1;
|
|
|
|
unsigned int bb_allowed:1;
|
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_get_dev_info - get information about an MTD device.
|
|
|
|
* @desc: MTD library descriptor
|
|
|
|
* @node: name of the MTD device node
|
|
|
|
* @mtd: the MTD device information is returned here
|
|
|
|
*
|
|
|
|
* This function gets information about MTD device defined by the @node device
|
|
|
|
* node file and saves this information in the @mtd object. Returns %0 in case
|
|
|
|
* of success and %-1 in case of failure. If MTD subsystem is not present in the
|
|
|
|
* system, or the MTD device does not exist, errno is set to @ENODEV.
|
|
|
|
*/
|
|
|
|
int mtd_get_dev_info(const char *node, struct mtd_dev_info *mtd);
|
|
|
|
|
|
|
|
/**
|
2013-02-14 09:16:15 +00:00
|
|
|
* libmtd_erase - erase an eraseblock.
|
2012-12-17 15:48:32 +00:00
|
|
|
* @desc: MTD library descriptor
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to erase
|
|
|
|
*
|
|
|
|
* This function erases eraseblock @eb of MTD device described by @fd. Returns
|
|
|
|
* %0 in case of success and %-1 in case of failure.
|
|
|
|
*/
|
2013-02-14 09:16:15 +00:00
|
|
|
int libmtd_erase(const struct mtd_dev_info *mtd, int fd, int eb);
|
2012-12-17 15:48:32 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_torture - torture an eraseblock.
|
|
|
|
* @desc: MTD library descriptor
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to torture
|
|
|
|
*
|
|
|
|
* This function tortures eraseblock @eb. Returns %0 in case of success and %-1
|
|
|
|
* in case of failure.
|
|
|
|
*/
|
|
|
|
int mtd_torture(const struct mtd_dev_info *mtd, int fd, int eb);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_is_bad - check if eraseblock is bad.
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to check
|
|
|
|
*
|
|
|
|
* This function checks if eraseblock @eb is bad. Returns %0 if not, %1 if yes,
|
|
|
|
* and %-1 in case of failure.
|
|
|
|
*/
|
|
|
|
int mtd_is_bad(const struct mtd_dev_info *mtd, int fd, int eb);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_mark_bad - mark an eraseblock as bad.
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to mark as bad
|
|
|
|
*
|
|
|
|
* This function marks eraseblock @eb as bad. Returns %0 in case of success and
|
|
|
|
* %-1 in case of failure.
|
|
|
|
*/
|
|
|
|
int mtd_mark_bad(const struct mtd_dev_info *mtd, int fd, int eb);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_read - read data from an MTD device.
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to read from
|
|
|
|
* @offs: offset withing the eraseblock to read from
|
|
|
|
* @buf: buffer to read data to
|
|
|
|
* @len: how many bytes to read
|
|
|
|
*
|
|
|
|
* This function reads @len bytes of data from eraseblock @eb and offset @offs
|
|
|
|
* of the MTD device defined by @mtd and stores the read data at buffer @buf.
|
|
|
|
* Returns %0 in case of success and %-1 in case of failure.
|
|
|
|
*/
|
2013-02-14 09:16:15 +00:00
|
|
|
int libmtd_read(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
|
2012-12-17 15:48:32 +00:00
|
|
|
void *buf, int len);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* mtd_write - write data to an MTD device.
|
|
|
|
* @mtd: MTD device description object
|
|
|
|
* @fd: MTD device node file descriptor
|
|
|
|
* @eb: eraseblock to write to
|
|
|
|
* @offs: offset withing the eraseblock to write to
|
|
|
|
* @buf: buffer to write
|
|
|
|
* @len: how many bytes to write
|
|
|
|
*
|
|
|
|
* This function writes @len bytes of data to eraseblock @eb and offset @offs
|
|
|
|
* of the MTD device defined by @mtd. Returns %0 in case of success and %-1 in
|
|
|
|
* case of failure.
|
|
|
|
*/
|
2013-02-14 09:16:15 +00:00
|
|
|
int libmtd_write(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
|
2012-12-17 15:48:32 +00:00
|
|
|
void *buf, int len);
|
|
|
|
|
|
|
|
#endif /* __LIBMTD_H__ */
|