[Issue 1000770] New: eCosCentric NAND library

[Issue 1000770] New: eCosCentric NAND library

[bugzilla-daemon]

http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000770

           Summary: eCosCentric NAND library
           Product: eCos
           Version: unknown
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: normal
         Component: Patches and contributions
        AssignedTo: wry@ecoscentric.com
        ReportedBy: wry@ecoscentric.com
         QAContact: ecos-patches@ecos.sourceware.org
             Class: Advice Request


Created an attachment (id=723)
 --> (http://bugzilla.ecoscentric.com/attachment.cgi?id=723)
Documentation snapshot

As discussed on ecos-maintainers, here is an interim drop of the documentation
for the NAND library we have developed in-house. I intend to have the code
cleaned up and ready to share next week, and will post it to this ticket.


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[Issue 1000770] eCosCentric NAND library

[bugzilla-daemon]

http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000770


Ross Younger <wry@ecoscentric.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #751 is|0                           |1
           obsolete|                            |




--- Comment #7 from Ross Younger <wry@ecoscentric.com>  2009-06-26 16:16:36 ---
Created an attachment (id=760)
 --> (http://bugzilla.ecoscentric.com/attachment.cgi?id=760)
20090626 snapshot

Significant part-refactor based on feedback received.

NAND: 
* add high-level locking;
* create global pagebuffer;
* be less stack-greedy (use that pagebuffer) so as to not crash in a minimal
config;
* rename nand_app.h to nand.h;
* rename some helper macros for consistency;
* make nand_bbt.h internal;
* move eccdamage test into synth driver;
* add more assertions;

Samsung K9 NAND driver: 
* refactor for NAND changes;
* better define chip-platform interface (created k9fxx08x0x.h); 
* replace calls to diag_printf with NAND_ERROR;

ea2468 HAL:
* refactor for K9 changes;
* add RedBoot heap size requirement;

yaffs: 
* merge to upstream timestamp 2009-05-16;
* omit unneeded YAFFS1 and qsort code;
* replace calls to diag_printf with TOUT;
* further general enhancements and bugfixes;

general: 
* retab files for consistency with eCos sources.


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[Issue 1000770] eCosCentric NAND library

[bugzilla-daemon]

http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000770


Ross Younger <wry@ecoscentric.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #723 is|0                           |1
           obsolete|                            |
 Attachment #748 is|0                           |1
           obsolete|                            |
 Attachment #760 is|0                           |1
           obsolete|                            |




--- Comment #8 from Ross Younger <wry@ecoscentric.com>  2009-08-26 18:43:37 ---
Created an attachment (id=787)
 --> (http://bugzilla.ecoscentric.com/attachment.cgi?id=787)
Latest snapshot

Here is the latest version of our NAND work. Inside the tarball are a number of
EPKs and patches, for better convenience for those who may wish to use it.

The NAND layer and devices are now presented as a single EPK. YAFFS is a
separate EPK, due to its different license. (I have attached the version number
d20090826 to both of these to reflect the fact that they are date-based
snapshots.)

Board-level support is included as separate patches for the ea2468 and
stm3210e_eval platform HALs. The RedBoot NAND enhancements (unchanged since the
drop of June 26) are in a separate patch.

Summary of changes:

1. Added support for the stm3210e_eval board, incorporating work by Simon
Kallweit, which I have refined into a two-mode low-level driver.

2. Added support for the ST Microelectronics NANDxxxx3A chip (by Simon
Kallweit).

3. Many enhancements to YAFFS:
* Docs expanded with a detailed memory usage calculation (though some recent
work has not yet been documented)
* Added erasenand.c utility
* Update to latest version from Aleph One's CVS repo
* Added small-page device support: added YAFFS1 support (incorporating and
building on Simon Kallweit's work) and YAFFS2 in inbandTags mode; which is used
is configurable.
* Multiple bugfixes: free-space calculation; add tag size sanity check

4. Enhancements to NAND: 
* Fixed corner case bug revealed by extreme stress testing
* Fixed embarrassing BBT initialisation bug
* Added read/write/erase benchmarker "test"

5. NAND synth device: add configurable bad-block injection

6. Samsung K9 chip driver: small optimisations


N.B. Documentation has yet to be written for the above new features, but its
current form can be seen in the eCosPro online docs:

NAND:
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/io-nand-overview.html

NAND drivers:
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/nand-drivers-present.html

YAFFS:
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/fs-yaffs-p.html


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[Issue 1000770] eCosCentric NAND library

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http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000770





--- Comment #9 from Ross Younger <wry@ecoscentric.com>  2009-08-26 19:01:20 ---
(In reply to comment #8)

More recent (part) docs for the synth NAND device are, it turns out, currently
lurking online too:
http://www.ecoscentric.com/ecospro/doc.cgi/html/ref/devs-nand-synth.html

(This needs to be sorted out and the two amalgamated - doing so is on my todo
list.)


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[Issue 1000770] eCosCentric NAND library

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http://bugzilla.ecoscentric.com/show_bug.cgi?id=1000770





--- Comment #10 from Ross Younger <wry@ecoscentric.com>  2009-10-05 16:36:13 ---
Since I last updated this ticket, the docs have been cleaned up a bit and
(most?) anomalies removed. The individual NAND chip drivers now have their own
chapters in the eCosPro reference manual, adjacent to the section for this NAND
library; board-specific configuration options have been moved to the eCosPro EA
LPC2468 and STM3210E HAL port docs.

The NAND driver and synth target links I mentioned earlier in this ticket have
rotted, in favour of the following: 
*
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/nanddev-samsung-k9.html
*
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/devs-nand-st-xxxx3a.html
*
http://www.ecoscentric.com/ecospro/doc.cgi/html/ecospro-ref/devs-nand-synth-ref.html


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