lib: add barebox version of libmtd
Based on mtd-utils and stripped down to needed functionality and reworked to barebox interfaces. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Wolfram Sang
Sascha Hauer
parent
b44d0e4528
commit
cb4b4eb32e
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@ -0,0 +1,149 @@
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/*
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* Copyright (C) 2008, 2009 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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* Author: Artem Bityutskiy
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*
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* MTD library.
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*/
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#ifndef __LIBMTD_H__
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#define __LIBMTD_H__
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/* Maximum MTD device name length */
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#define MTD_NAME_MAX 127
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/* Maximum MTD device type string length */
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#define MTD_TYPE_MAX 64
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/**
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* struct mtd_dev_info - information about an MTD device.
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* @node: node pointing to device
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* @type: flash type (constants like %MTD_NANDFLASH defined in mtd-abi.h)
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* @type_str: static R/O flash type string
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* @name: device name
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* @size: device size in bytes
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* @eb_cnt: count of eraseblocks
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* @eb_size: eraseblock size
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* @min_io_size: minimum input/output unit size
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* @subpage_size: sub-page size
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* @oob_size: OOB size (zero if the device does not have OOB area)
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* @region_cnt: count of additional erase regions
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* @writable: zero if the device is read-only
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* @bb_allowed: non-zero if the MTD device may have bad eraseblocks
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*/
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struct mtd_dev_info
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{
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const char *node;
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int type;
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const char type_str[MTD_TYPE_MAX + 1];
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long long size;
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int eb_cnt;
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int eb_size;
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int min_io_size;
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int subpage_size;
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int oob_size;
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int region_cnt;
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unsigned int writable:1;
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unsigned int bb_allowed:1;
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};
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/**
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* mtd_get_dev_info - get information about an MTD device.
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* @desc: MTD library descriptor
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* @node: name of the MTD device node
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* @mtd: the MTD device information is returned here
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*
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* This function gets information about MTD device defined by the @node device
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* node file and saves this information in the @mtd object. Returns %0 in case
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* of success and %-1 in case of failure. If MTD subsystem is not present in the
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* system, or the MTD device does not exist, errno is set to @ENODEV.
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*/
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int mtd_get_dev_info(const char *node, struct mtd_dev_info *mtd);
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/**
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* mtd_erase - erase an eraseblock.
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* @desc: MTD library descriptor
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to erase
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*
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* This function erases eraseblock @eb of MTD device described by @fd. Returns
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* %0 in case of success and %-1 in case of failure.
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*/
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int mtd_erase(const struct mtd_dev_info *mtd, int fd, int eb);
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/**
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* mtd_torture - torture an eraseblock.
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* @desc: MTD library descriptor
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to torture
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*
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* This function tortures eraseblock @eb. Returns %0 in case of success and %-1
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* in case of failure.
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*/
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int mtd_torture(const struct mtd_dev_info *mtd, int fd, int eb);
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/**
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* mtd_is_bad - check if eraseblock is bad.
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to check
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*
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* This function checks if eraseblock @eb is bad. Returns %0 if not, %1 if yes,
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* and %-1 in case of failure.
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*/
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int mtd_is_bad(const struct mtd_dev_info *mtd, int fd, int eb);
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/**
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* mtd_mark_bad - mark an eraseblock as bad.
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to mark as bad
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*
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* This function marks eraseblock @eb as bad. Returns %0 in case of success and
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* %-1 in case of failure.
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*/
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int mtd_mark_bad(const struct mtd_dev_info *mtd, int fd, int eb);
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/**
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* mtd_read - read data from an MTD device.
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to read from
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* @offs: offset withing the eraseblock to read from
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* @buf: buffer to read data to
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* @len: how many bytes to read
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*
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* This function reads @len bytes of data from eraseblock @eb and offset @offs
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* of the MTD device defined by @mtd and stores the read data at buffer @buf.
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* Returns %0 in case of success and %-1 in case of failure.
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*/
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int mtd_read(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
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void *buf, int len);
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/**
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* mtd_write - write data to an MTD device.
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* @mtd: MTD device description object
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* @fd: MTD device node file descriptor
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* @eb: eraseblock to write to
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* @offs: offset withing the eraseblock to write to
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* @buf: buffer to write
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* @len: how many bytes to write
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*
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* This function writes @len bytes of data to eraseblock @eb and offset @offs
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* of the MTD device defined by @mtd. Returns %0 in case of success and %-1 in
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* case of failure.
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*/
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int mtd_write(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
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void *buf, int len);
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#endif /* __LIBMTD_H__ */
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@ -47,6 +47,9 @@ config LIBSCAN
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config LIBUBIGEN
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bool
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config LIBMTD
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bool
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source lib/gui/Kconfig
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endmenu
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@ -36,6 +36,7 @@ obj-$(CONFIG_BITREV) += bitrev.o
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obj-$(CONFIG_QSORT) += qsort.o
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obj-$(CONFIG_LIBSCAN) += libscan.o
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obj-$(CONFIG_LIBUBIGEN) += libubigen.o
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obj-$(CONFIG_LIBMTD) += libmtd.o
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obj-y += gui/
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obj-$(CONFIG_XYMODEM) += xymodem.o
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obj-y += unlink-recursive.o
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@ -0,0 +1,368 @@
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/*
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* Copyright (C) 2009 Nokia Corporation
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* Copyright (C) 2012 Wolfram Sang, Pengutronix e.K. <w.sang@pengutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* Author: Artem Bityutskiy
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* Author: Wolfram Sang
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*
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* This file is part of the MTD library. Based on pre-2.6.30 kernels support,
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* now adapted to barebox.
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*
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* NOTE: No support for 64 bit sizes yet!
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*/
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#include <common.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include <errno.h>
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#include <crc.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <ioctl.h>
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#include <linux/stat.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/mtd-abi.h>
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#include <mtd/libmtd.h>
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#include <mtd/utils.h>
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#define PROGRAM_NAME "libmtd"
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static inline int mtd_ioctl_error(const struct mtd_dev_info *mtd, int eb,
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const char *sreq)
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{
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return sys_errmsg("%s ioctl failed for eraseblock %d (%s)",
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sreq, eb, mtd->node);
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}
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static int mtd_valid_erase_block(const struct mtd_dev_info *mtd, int eb)
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{
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if (eb < 0 || eb >= mtd->eb_cnt) {
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errmsg("bad eraseblock number %d, %s has %d eraseblocks",
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eb, mtd->node, mtd->eb_cnt);
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errno = EINVAL;
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return -1;
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}
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return 0;
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}
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int mtd_erase(const struct mtd_dev_info *mtd, int fd, int eb)
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{
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int ret;
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struct erase_info_user ei;
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ret = mtd_valid_erase_block(mtd, eb);
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if (ret)
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return ret;
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ei.start = (__u64)eb * mtd->eb_size;
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ei.length = mtd->eb_size;
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ret = ioctl(fd, MEMERASE, &ei);
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if (ret < 0)
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return mtd_ioctl_error(mtd, eb, "MEMERASE");
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return 0;
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}
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/* Patterns to write to a physical eraseblock when torturing it */
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static uint8_t patterns[] = {0xa5, 0x5a, 0x0};
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/**
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* check_pattern - check if buffer contains only a certain byte pattern.
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* @buf: buffer to check
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* @patt: the pattern to check
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* @size: buffer size in bytes
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*
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* This function returns %1 in there are only @patt bytes in @buf, and %0 if
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* something else was also found.
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*/
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static int check_pattern(const void *buf, uint8_t patt, int size)
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{
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int i;
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for (i = 0; i < size; i++)
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if (((const uint8_t *)buf)[i] != patt)
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return 0;
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return 1;
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}
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int mtd_torture(const struct mtd_dev_info *mtd, int fd, int eb)
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{
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int err, i, patt_count;
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void *buf;
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normsg("run torture test for PEB %d", eb);
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patt_count = ARRAY_SIZE(patterns);
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buf = xmalloc(mtd->eb_size);
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for (i = 0; i < patt_count; i++) {
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err = mtd_erase(mtd, fd, eb);
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if (err)
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goto out;
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/* Make sure the PEB contains only 0xFF bytes */
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err = mtd_read(mtd, fd, eb, 0, buf, mtd->eb_size);
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if (err)
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goto out;
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err = check_pattern(buf, 0xFF, mtd->eb_size);
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if (err == 0) {
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errmsg("erased PEB %d, but a non-0xFF byte found", eb);
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errno = EIO;
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goto out;
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}
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/* Write a pattern and check it */
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memset(buf, patterns[i], mtd->eb_size);
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err = mtd_write(mtd, fd, eb, 0, buf, mtd->eb_size);
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if (err)
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goto out;
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memset(buf, ~patterns[i], mtd->eb_size);
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err = mtd_read(mtd, fd, eb, 0, buf, mtd->eb_size);
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if (err)
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goto out;
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err = check_pattern(buf, patterns[i], mtd->eb_size);
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if (err == 0) {
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errmsg("pattern %x checking failed for PEB %d",
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patterns[i], eb);
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errno = EIO;
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goto out;
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}
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}
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err = 0;
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normsg("PEB %d passed torture test, do not mark it a bad", eb);
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out:
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free(buf);
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return -1;
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}
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int mtd_is_bad(const struct mtd_dev_info *mtd, int fd, int eb)
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{
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int ret;
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loff_t seek;
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ret = mtd_valid_erase_block(mtd, eb);
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if (ret)
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return ret;
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if (!mtd->bb_allowed)
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return 0;
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seek = (loff_t)eb * mtd->eb_size;
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ret = ioctl(fd, MEMGETBADBLOCK, &seek);
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if (ret == -1)
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return mtd_ioctl_error(mtd, eb, "MEMGETBADBLOCK");
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return ret;
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}
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int mtd_mark_bad(const struct mtd_dev_info *mtd, int fd, int eb)
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{
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int ret;
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loff_t seek;
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if (!mtd->bb_allowed) {
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errno = EINVAL;
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return -1;
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}
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ret = mtd_valid_erase_block(mtd, eb);
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if (ret)
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return ret;
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seek = (loff_t)eb * mtd->eb_size;
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ret = ioctl(fd, MEMSETBADBLOCK, &seek);
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if (ret == -1)
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return mtd_ioctl_error(mtd, eb, "MEMSETBADBLOCK");
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return 0;
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}
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int mtd_read(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
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void *buf, int len)
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{
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int ret, rd = 0;
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off_t seek;
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ret = mtd_valid_erase_block(mtd, eb);
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if (ret)
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return ret;
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if (offs < 0 || offs + len > mtd->eb_size) {
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errmsg("bad offset %d or length %d, %s eraseblock size is %d",
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offs, len, mtd->node, mtd->eb_size);
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errno = EINVAL;
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return -1;
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}
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/* Seek to the beginning of the eraseblock */
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seek = (off_t)eb * mtd->eb_size + offs;
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if (lseek(fd, seek, SEEK_SET) != seek)
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return sys_errmsg("cannot seek %s to offset %llu",
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mtd->node, (unsigned long long)seek);
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while (rd < len) {
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ret = read(fd, buf, len);
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if (ret < 0)
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return sys_errmsg("cannot read %d bytes from %s (eraseblock %d, offset %d)",
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len, mtd->node, eb, offs);
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rd += ret;
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}
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return 0;
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}
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int mtd_write(const struct mtd_dev_info *mtd, int fd, int eb, int offs,
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void *buf, int len)
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{
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int ret;
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off_t seek;
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ret = mtd_valid_erase_block(mtd, eb);
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if (ret)
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return ret;
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if (offs < 0 || offs + len > mtd->eb_size) {
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errmsg("bad offset %d or length %d, %s eraseblock size is %d",
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offs, len, mtd->node, mtd->eb_size);
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errno = EINVAL;
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return -1;
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}
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if (offs % mtd->subpage_size) {
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errmsg("write offset %d is not aligned to %s min. I/O size %d",
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offs, mtd->node, mtd->subpage_size);
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errno = EINVAL;
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return -1;
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}
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if (len % mtd->subpage_size) {
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errmsg("write length %d is not aligned to %s min. I/O size %d",
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len, mtd->node, mtd->subpage_size);
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errno = EINVAL;
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return -1;
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}
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/* Seek to the beginning of the eraseblock */
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seek = (off_t)eb * mtd->eb_size + offs;
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if (lseek(fd, seek, SEEK_SET) != seek)
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return sys_errmsg("cannot seek %s to offset %llu",
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mtd->node, (unsigned long long)seek);
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ret = write(fd, buf, len);
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if (ret != len)
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return sys_errmsg("cannot write %d bytes to %s (eraseblock %d, offset %d)",
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len, mtd->node, eb, offs);
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return 0;
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}
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/**
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* mtd_get_dev_info - fill the mtd_dev_info structure
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* @node: name of the MTD device node
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* @mtd: the MTD device information is returned here
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*/
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int mtd_get_dev_info(const char *node, struct mtd_dev_info *mtd)
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{
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struct mtd_info_user ui;
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int fd, ret;
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loff_t offs = 0;
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memset(mtd, '\0', sizeof(struct mtd_dev_info));
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mtd->node = node;
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fd = open(node, O_RDWR);
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if (fd < 0)
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return sys_errmsg("cannot open \"%s\"", node);
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if (ioctl(fd, MEMGETINFO, &ui)) {
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sys_errmsg("MEMGETINFO ioctl request failed");
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goto out_close;
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}
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ret = ioctl(fd, MEMGETBADBLOCK, &offs);
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if (ret == -1) {
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if (errno != EOPNOTSUPP) {
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sys_errmsg("MEMGETBADBLOCK ioctl failed");
|
||||
goto out_close;
|
||||
}
|
||||
errno = 0;
|
||||
mtd->bb_allowed = 0;
|
||||
} else
|
||||
mtd->bb_allowed = 1;
|
||||
|
||||
mtd->type = ui.type;
|
||||
mtd->size = ui.size;
|
||||
mtd->eb_size = ui.erasesize;
|
||||
mtd->min_io_size = ui.writesize;
|
||||
mtd->oob_size = ui.oobsize;
|
||||
|
||||
if (mtd->min_io_size <= 0) {
|
||||
errmsg("%s has insane min. I/O unit size %d",
|
||||
node, mtd->min_io_size);
|
||||
goto out_close;
|
||||
}
|
||||
if (mtd->eb_size <= 0 || mtd->eb_size < mtd->min_io_size) {
|
||||
errmsg("%s has insane eraseblock size %d",
|
||||
node, mtd->eb_size);
|
||||
goto out_close;
|
||||
}
|
||||
if (mtd->size <= 0 || mtd->size < mtd->eb_size) {
|
||||
errmsg("%s has insane size %lld",
|
||||
node, mtd->size);
|
||||
goto out_close;
|
||||
}
|
||||
|
||||
mtd->eb_cnt = ui.size / ui.erasesize;
|
||||
|
||||
switch(mtd->type) {
|
||||
case MTD_ABSENT:
|
||||
errmsg("%s (%s) is removable and is not present",
|
||||
mtd->node, node);
|
||||
goto out_close;
|
||||
case MTD_RAM:
|
||||
strcpy((char *)mtd->type_str, "ram");
|
||||
break;
|
||||
case MTD_ROM:
|
||||
strcpy((char *)mtd->type_str, "rom");
|
||||
break;
|
||||
case MTD_NORFLASH:
|
||||
strcpy((char *)mtd->type_str, "nor");
|
||||
break;
|
||||
case MTD_NANDFLASH:
|
||||
strcpy((char *)mtd->type_str, "nand");
|
||||
break;
|
||||
case MTD_DATAFLASH:
|
||||
strcpy((char *)mtd->type_str, "dataflash");
|
||||
break;
|
||||
case MTD_UBIVOLUME:
|
||||
strcpy((char *)mtd->type_str, "ubi");
|
||||
break;
|
||||
default:
|
||||
goto out_close;
|
||||
}
|
||||
|
||||
if (ui.flags & MTD_WRITEABLE)
|
||||
mtd->writable = 1;
|
||||
mtd->subpage_size = mtd->min_io_size;
|
||||
|
||||
close(fd);
|
||||
|
||||
return 0;
|
||||
|
||||
out_close:
|
||||
close(fd);
|
||||
return -1;
|
||||
}
|
||||
Loading…
Reference in New Issue