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  1. 24 Mar, 2009 1 commit
  3. 06 Jan, 2009 1 commit
  5. 23 Dec, 2008 1 commit
  7. 10 Dec, 2008 2 commits
  9. 12 Aug, 2008 1 commit
  11. 04 Jun, 2008 1 commit
  13. 14 Oct, 2007 1 commit
  15. 23 Jul, 2007 1 commit
  17. 08 Mar, 2007 1 commit
    • Vitaly Wool's avatar
      [MTD] [NAND] make oobavail public · 1f92267c
      Vitaly Wool authored 
      
During the MTD rework the oobavail parameter of mtd_info structure has become
private. This is not quite correct in terms of integrity and logic. If we have
means to write to OOB area, then we'd like to know upfront how many bytes out
of OOB are spare per page to be able to adapt to specific cases.
The patch inlined adds the public oobavail parameter.
Signed-off-by: default avatarVitaly Wool <vwool@ru.mvista.com>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
      1f92267c
  19. 09 Feb, 2007 1 commit
  21. 29 Nov, 2006 1 commit
  23. 28 Nov, 2006 2 commits
  25. 29 May, 2006 5 commits
    • Thomas Gleixner's avatar
      [MTD] NAND Expose the new raw mode function and status info to userspace · f1a28c02
      Thomas Gleixner authored 
      
The raw read/write access to NAND (without ECC) has been changed in the
NAND rework. Expose the new way - setting the file mode via ioctl - to
userspace. Also allow to read out the ecc statistics information so userspace
tools can see that bitflips happened and whether errors where correctable
or not. Also expose the number of bad blocks for the partition, so nandwrite
can check if the data fits into the parition before writing to it.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      f1a28c02
    • Thomas Gleixner's avatar
      [MTD] NAND Signal that a bitflip was corrected by ECC · 9a1fcdfd
      Thomas Gleixner authored 
      
Return -EUCLEAN on read when a bitflip was detected and corrected, so the
clients can react and eventually copy the affected block to a spare one.
Make all in kernel users aware of the change.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      9a1fcdfd
    • Thomas Gleixner's avatar
      [MTD] Rework the out of band handling completely · 8593fbc6
      Thomas Gleixner authored 
      
Hopefully the last iteration on this!

The handling of out of band data on NAND was accompanied by tons of fruitless
discussions and halfarsed patches to make it work for a particular
problem. Sufficiently annoyed by I all those "I know it better" mails and the
resonable amount of discarded "it solves my problem" patches, I finally decided
to go for the big rework. After removing the _ecc variants of mtd read/write
functions the solution to satisfy the various requirements was to refactor the
read/write _oob functions in mtd.

The major change is that read/write_oob now takes a pointer to an operation
descriptor structure "struct mtd_oob_ops".instead of having a function with at
least seven arguments.

read/write_oob which should probably renamed to a more descriptive name, can do
the following tasks:

- read/write out of band data
- read/write data content and out of band data
- read/write raw data content and out of band data (ecc disabled)

struct mtd_oob_ops has a mode field, which determines the oob handling mode.

Aside of the MTD_OOB_RAW mode, which is intended to be especially for
diagnostic purposes and some internal functions e.g. bad block table creation,
the other two modes are for mtd clients:

MTD_OOB_PLACE puts/gets the given oob data exactly to/from the place which is
described by the ooboffs and ooblen fields of the mtd_oob_ops strcuture. It's
up to the caller to make sure that the byte positions are not used by the ECC
placement algorithms.

MTD_OOB_AUTO puts/gets the given oob data automaticaly to/from the places in
the out of band area which are described by the oobfree tuples in the ecclayout
data structre which is associated to the devicee.

The decision whether data plus oob or oob only handling is done depends on the
setting of the datbuf member of the data structure. When datbuf == NULL then
the internal read/write_oob functions are selected, otherwise the read/write
data routines are invoked.

Tested on a few platforms with all variants. Please be aware of possible
regressions for your particular device / application scenario

Disclaimer: Any whining will be ignored from those who just contributed "hot
air blurb" and never sat down to tackle the underlying problem of the mess in
the NAND driver grown over time and the big chunk of work to fix up the
existing users. The problem was not the holiness of the existing MTD
interfaces. The problems was the lack of time to go for the big overhaul. It's
easy to add more mess to the existing one, but it takes alot of effort to go
for a real solution.

Improvements and bugfixes are welcome!
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      8593fbc6
    • Thomas Gleixner's avatar
      [MTD] NAND Replace oobinfo by ecclayout · 5bd34c09
      Thomas Gleixner authored 
      
The nand_oobinfo structure is not fitting the newer error correction
demands anymore. Replace it by struct nand_ecclayout and fixup the users
all over the place. Keep the nand_oobinfo based ioctl for user space
compability reasons.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      5bd34c09
    • Thomas Gleixner's avatar
      [MTD] NAND Consolidate oobinfo handling · ff268fb8
      Thomas Gleixner authored 
      
The info structure for out of band data was copied into
the mtd structure. Make it a pointer and remove the ability
to set it from userspace. The position of ecc bytes is
defined by the hardware and should not be changed by software.
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      ff268fb8
  27. 23 May, 2006 2 commits
  29. 22 May, 2006 1 commit
    • Joern Engel's avatar
      [MTD] Introduce writesize · 28318776
      Joern Engel authored 
      
At least two flashes exists that have the concept of a minimum write unit,
similar to NAND pages, but no other NAND characteristics.  Therefore, rename
the minimum write unit to "writesize" for all flashes, including NAND.
Signed-off-by: default avatarJoern Engel <joern@wh.fh-wedel.de>
      28318776
  31. 20 May, 2006 1 commit
  33. 17 May, 2006 2 commits
  35. 26 Mar, 2006 1 commit
  37. 07 Nov, 2005 1 commit
  39. 06 Nov, 2005 1 commit
  41. 30 Oct, 2005 1 commit
    • Tim Schmielau's avatar
      [PATCH] fix missing includes · 4e57b681
      Tim Schmielau authored 
      
I recently picked up my older work to remove unnecessary #includes of
sched.h, starting from a patch by Dave Jones to not include sched.h
from module.h. This reduces the number of indirect includes of sched.h
by ~300. Another ~400 pointless direct includes can be removed after
this disentangling (patch to follow later).
However, quite a few indirect includes need to be fixed up for this.

In order to feed the patches through -mm with as little disturbance as
possible, I've split out the fixes I accumulated up to now (complete for
i386 and x86_64, more archs to follow later) and post them before the real
patch.  This way this large part of the patch is kept simple with only
adding #includes, and all hunks are independent of each other.  So if any
hunk rejects or gets in the way of other patches, just drop it.  My scripts
will pick it up again in the next round.
Signed-off-by: default avatarTim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      4e57b681
  43. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored 
      Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
      1da177e4