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Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (82 commits) [MTD] m25p80: Add Support for ATMEL AT25DF641 64-Megabit SPI Flash [MTD] m25p80: add FAST_READ access support to M25Pxx [MTD] [NAND] bf5xx_nand: Avoid crash if bfin_mac is installed. [MTD] [NAND] at91_nand: control NCE signal [MTD] [NAND] AT91 hardware ECC compile fix for at91sam9263 / at91sam9260 [MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260 [JFFS2] Introduce dbg_readinode2 log level, use it to shut read_dnode() up [JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure. [JFFS2] Add erase_checking_list to hold blocks being marked. UBI: add a message [JFFS2] Return values of jffs2_block_check_erase error paths [MTD] Clean up AR7 partition map support [MTD] [NOR] Fix Intel CFI driver for collie flash [JFFS2] Finally remove redundant ref->__totlen field. [JFFS2] Honour TEST_TOTLEN macro in debugging code. ref->__totlen is going! [JFFS2] Add paranoia debugging for superblock counts [JFFS2] Fix free space leak with in-band cleanmarkers [JFFS2] Self-sufficient #includes in jffs2_fs_i.h: include <linux/mutex.h> [MTD] [NAND] Verify probe by retrying to checking the results match [MTD] [NAND] S3C2410 Allow ECC disable to be specified by the board ...
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What: /sys/class/ubi/ | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
The ubi/ class sub-directory belongs to the UBI subsystem and | ||
provides general UBI information, per-UBI device information | ||
and per-UBI volume information. | ||
|
||
What: /sys/class/ubi/version | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
This file contains version of the latest supported UBI on-media | ||
format. Currently it is 1, and there is no plan to change this. | ||
However, if in the future UBI needs on-flash format changes | ||
which cannot be done in a compatible manner, a new format | ||
version will be added. So this is a mechanism for possible | ||
future backward-compatible (but forward-incompatible) | ||
improvements. | ||
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||
What: /sys/class/ubiX/ | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
The /sys/class/ubi0, /sys/class/ubi1, etc directories describe | ||
UBI devices (UBI device 0, 1, etc). They contain general UBI | ||
device information and per UBI volume information (each UBI | ||
device may have many UBI volumes) | ||
|
||
What: /sys/class/ubi/ubiX/avail_eraseblocks | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Amount of available logical eraseblock. For example, one may | ||
create a new UBI volume which has this amount of logical | ||
eraseblocks. | ||
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||
What: /sys/class/ubi/ubiX/bad_peb_count | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Count of bad physical eraseblocks on the underlying MTD device. | ||
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||
What: /sys/class/ubi/ubiX/bgt_enabled | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Contains ASCII "0\n" if the UBI background thread is disabled, | ||
and ASCII "1\n" if it is enabled. | ||
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||
What: /sys/class/ubi/ubiX/dev | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Major and minor numbers of the character device corresponding | ||
to this UBI device (in <major>:<minor> format). | ||
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||
What: /sys/class/ubi/ubiX/eraseblock_size | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Maximum logical eraseblock size this UBI device may provide. UBI | ||
volumes may have smaller logical eraseblock size because of their | ||
alignment. | ||
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||
What: /sys/class/ubi/ubiX/max_ec | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Maximum physical eraseblock erase counter value. | ||
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||
What: /sys/class/ubi/ubiX/max_vol_count | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Maximum number of volumes which this UBI device may have. | ||
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||
What: /sys/class/ubi/ubiX/min_io_size | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Minimum input/output unit size. All the I/O may only be done | ||
in fractions of the contained number. | ||
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||
What: /sys/class/ubi/ubiX/mtd_num | ||
Date: January 2008 | ||
KernelVersion: 2.6.25 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Number of the underlying MTD device. | ||
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What: /sys/class/ubi/ubiX/reserved_for_bad | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Number of physical eraseblocks reserved for bad block handling. | ||
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||
What: /sys/class/ubi/ubiX/total_eraseblocks | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Total number of good (not marked as bad) physical eraseblocks on | ||
the underlying MTD device. | ||
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||
What: /sys/class/ubi/ubiX/volumes_count | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Count of volumes on this UBI device. | ||
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||
What: /sys/class/ubi/ubiX/ubiX_Y/ | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/, | ||
etc directories describe UBI volumes on UBI device X (volumes | ||
0, 1, etc). | ||
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||
What: /sys/class/ubi/ubiX/ubiX_Y/alignment | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Volume alignment - the value the logical eraseblock size of | ||
this volume has to be aligned on. For example, 2048 means that | ||
logical eraseblock size is multiple of 2048. In other words, | ||
volume logical eraseblock size is UBI device logical eraseblock | ||
size aligned to the alignment value. | ||
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What: /sys/class/ubi/ubiX/ubiX_Y/corrupted | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n" | ||
if it is corrupted (e.g., due to an interrupted volume update). | ||
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||
What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
The amount of data this volume contains. This value makes sense | ||
only for static volumes, and for dynamic volume it equivalent | ||
to the total volume size in bytes. | ||
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||
What: /sys/class/ubi/ubiX/ubiX_Y/dev | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Major and minor numbers of the character device corresponding | ||
to this UBI volume (in <major>:<minor> format). | ||
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What: /sys/class/ubi/ubiX/ubiX_Y/name | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Volume name. | ||
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What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Count of physical eraseblock reserved for this volume. | ||
Equivalent to the volume size in logical eraseblocks. | ||
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What: /sys/class/ubi/ubiX/ubiX_Y/type | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Volume type. Contains ASCII "dynamic\n" for dynamic volumes and | ||
"static\n" for static volumes. | ||
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||
What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Contains ASCII "0\n" if the update marker is not set for this | ||
volume, and "1\n" if it is set. The update marker is set when | ||
volume update starts, and cleaned when it ends. So the presence | ||
of the update marker indicates that the volume is being updated | ||
at the moment of the update was interrupted. The later may be | ||
checked using the "corrupted" sysfs file. | ||
|
||
What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size | ||
Date: July 2006 | ||
KernelVersion: 2.6.22 | ||
Contact: Artem Bityutskiy <[email protected]> | ||
Description: | ||
Logical eraseblock size of this volume. Equivalent to logical | ||
eraseblock size of the device aligned on the volume alignment | ||
value. |
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S3C24XX NAND Support | ||
==================== | ||
|
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Introduction | ||
------------ | ||
|
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Small Page NAND | ||
--------------- | ||
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The driver uses a 512 byte (1 page) ECC code for this setup. The | ||
ECC code is not directly compatible with the default kernel ECC | ||
code, so the driver enforces its own OOB layout and ECC parameters | ||
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Large Page NAND | ||
--------------- | ||
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The driver is capable of handling NAND flash with a 2KiB page | ||
size, with support for hardware ECC generation and correction. | ||
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Unlike the 512byte page mode, the driver generates ECC data for | ||
each 256 byte block in an 2KiB page. This means that more than | ||
one error in a page can be rectified. It also means that the | ||
OOB layout remains the default kernel layout for these flashes. | ||
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Document Author | ||
--------------- | ||
|
||
Ben Dooks, Copyright 2007 Simtec Electronics | ||
|
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