* [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25
@ 2010-08-28 3:35 dajiang.zhong at tektronix.com
2010-08-28 4:16 ` dajiang
2010-08-30 19:36 ` Scott Wood
0 siblings, 2 replies; 5+ messages in thread
From: dajiang.zhong at tektronix.com @ 2010-08-28 3:35 UTC (permalink / raw)
To: u-boot
Hi, every one.
This is my first time of posting a message here, firstly , thanks for any body who builds such a nice platform give help.
In recent two weeks, I added a NAND flash driver support for Micron's MT29F2G08ABD (SLC;page size: x8 2048+64bytes; Block size: 64 pages; Device size: 2Gb) memory chip base on u-boot 2009.08 for i.mx25. Block Erasing and Page Programming functions worked properly, but when I do page reading operation, "UnCorrectable RS-ECC Error" error message prompted. I checked the NFC (NAND Flash Controller) spare area buffer and found that the 4th 512-byte spare area buffer's data were very weird, there is not any ECC code that should be generated by the FEC but contained the data what I programmed to the memory.
In order to easy to do troubleshooting works, I make a simply testing process, what I do is, firstly, I only erase page 0 of block 0, and later I program the erased page with a 2k file which consisted of 2048 same character 'E', at last I read the page back , but "UnCorrectable RS-ECC Error" occurs. I pasted the contents of NFC's spare area buffer as following:
bb001000: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001010: b935d166 ffffffba ffffffff ffffffff f.5.............
bb001020: 5f7467b9 21650de8 4d97fbd0 3166372c .gt_..e!...M,7f1
bb001030: 3b7e8bef b1cf62a5 bb8f50f6 de0031b3 ..~;.b...P...1..
bb001040: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001050: b935d166 ffffffba ffffffff ffffffff f.5.............
bb001060: bafcf1fa 0c0698ef 09089d72 e6200c80 ........r..... .
bb001070: d638f5ef 20130b40 591dd763 e224f527 ..8. at .. c..Y'.$.
bb001080: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001090: b935d166 ffffffba ffffffff ffffffff f.5.............
bb0010a0: 76fa88ba 7a648809 d27bbc43 6b2b81cf ...v..dzC.{...+k
bb0010b0: f6b95e3b 1286638e 73d324fb 22880ce5 ;^...c...$.s..."
bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010e0: 36d8f3d5 0099a9e7 eb289d07 11664624 ...6......(.$Ff.
bb0010f0: 4fbb9f24 505ab041 25ff61f6 43280406 $..OA.ZP.a.%..(C
Contents written in red characters should be ECC code, but changed to what I programmed to the memory in preverious programming process.
Any advice, please feel free to tell me. Thanks very much in advance.
Thanks & Regards,
Leon Zhong
^ permalink raw reply [flat|nested] 5+ messages in thread* [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25
2010-08-28 3:35 [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25 dajiang.zhong at tektronix.com
@ 2010-08-28 4:16 ` dajiang
2010-08-30 19:36 ` Scott Wood
1 sibling, 0 replies; 5+ messages in thread
From: dajiang @ 2010-08-28 4:16 UTC (permalink / raw)
To: u-boot
because characters couldn't be written in red, so I put the wrong contents as
following:
bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
I really appreciate any suggestions very much.
dajiang.zhong wrote:
>
> Hi, every one.
> This is my first time of posting a message here, firstly , thanks for any
> body who builds such a nice platform give help.
> In recent two weeks, I added a NAND flash driver support for Micron's
> MT29F2G08ABD (SLC;page size: x8 2048+64bytes; Block size: 64 pages; Device
> size: 2Gb) memory chip base on u-boot 2009.08 for i.mx25. Block Erasing
> and Page Programming functions worked properly, but when I do page
> reading operation, "UnCorrectable RS-ECC Error" error message prompted.
> I checked the NFC (NAND Flash Controller) spare area buffer and found that
> the 4th 512-byte spare area buffer's data were very weird, there is not
> any ECC code that should be generated by the FEC but contained the data
> what I programmed to the memory.
> In order to easy to do troubleshooting works, I make a simply testing
> process, what I do is, firstly, I only erase page 0 of block 0, and later
> I program the erased page with a 2k file which consisted of 2048 same
> character 'E', at last I read the page back , but "UnCorrectable RS-ECC
> Error" occurs. I pasted the contents of NFC's spare area buffer as
> following:
>
> bb001000: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001010: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb001020: 5f7467b9 21650de8 4d97fbd0 3166372c .gt_..e!...M,7f1
> bb001030: 3b7e8bef b1cf62a5 bb8f50f6 de0031b3 ..~;.b...P...1..
> bb001040: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001050: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb001060: bafcf1fa 0c0698ef 09089d72 e6200c80 ........r..... .
> bb001070: d638f5ef 20130b40 591dd763 e224f527 ..8. at .. c..Y'.$.
> bb001080: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
> bb001090: b935d166 ffffffba ffffffff ffffffff f.5.............
> bb0010a0: 76fa88ba 7a648809 d27bbc43 6b2b81cf ...v..dzC.{...+k
> bb0010b0: f6b95e3b 1286638e 73d324fb 22880ce5 ;^...c...$.s..."
> bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
> bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
> bb0010e0: 36d8f3d5 0099a9e7 eb289d07 11664624 ...6......(.$Ff.
> bb0010f0: 4fbb9f24 505ab041 25ff61f6 43280406 $..OA.ZP.a.%..(C
>
> Contents written in red characters should be ECC code, but changed to
> what I programmed to the memory in preverious programming process.
> Any advice, please feel free to tell me. Thanks very much in advance.
>
> Thanks & Regards,
> Leon Zhong
>
>
>
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
>
>
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^ permalink raw reply [flat|nested] 5+ messages in thread* [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25
2010-08-28 3:35 [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25 dajiang.zhong at tektronix.com
2010-08-28 4:16 ` dajiang
@ 2010-08-30 19:36 ` Scott Wood
2010-09-01 5:35 ` dajiang
1 sibling, 1 reply; 5+ messages in thread
From: Scott Wood @ 2010-08-30 19:36 UTC (permalink / raw)
To: u-boot
On Fri, 27 Aug 2010 20:35:12 -0700
<dajiang.zhong@tektronix.com> wrote:
> This is my first time of posting a message here, firstly , thanks for any
> body who builds such a nice platform give help. In recent two weeks, I
> added a NAND flash driver support for Micron's MT29F2G08ABD (SLC;page
> size: x8 2048+64bytes; Block size: 64 pages; Device size: 2Gb) memory chip
> base on u-boot 2009.08 for i.mx25.
Could you try it on current U-Boot? It should already have support for
i.mx25's NAND controller in drivers/mtd/nand/mxc_nand.c.
> I make a simply testing process, what I do is, firstly, I only erase page
> 0 of block 0,
You cannot erase only page 0. You have to erase a whole block at a time.
-Scott
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25
2010-08-30 19:36 ` Scott Wood
@ 2010-09-01 5:35 ` dajiang
0 siblings, 0 replies; 5+ messages in thread
From: dajiang @ 2010-09-01 5:35 UTC (permalink / raw)
To: u-boot
Scott Wood-2 wrote:
>
> On Fri, 27 Aug 2010 20:35:12 -0700
>
> Could you try it on current U-Boot? It should already have support for
> i.mx25's NAND controller in drivers/mtd/nand/mxc_nand.c.
>
>> I make a simply testing process, what I do is, firstly, I only erase page
>> 0 of block 0,
>
> You cannot erase only page 0. You have to erase a whole block at a time.
>
> -Scott
>
>
Thanks Scott, I think there maybe some abscure expression in my previous
explain about my test process, In my testing prcess firstly, I erased whole
block 0,then I program only page 0 of block 0. Now I am trying current
U-Boot to see if it will work. Thanks very much Scott.
--
View this message in context: http://old.nabble.com/-U-Boot--%22UnCorrectable-RS-ECC-Error%22-occurs-when-reading-NAND-flash-under-u-boot-2009.08-for-i.mx25-tp29558415p29590136.html
Sent from the Uboot - Users mailing list archive at Nabble.com.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25
@ 2010-08-28 3:57 dajiang
0 siblings, 0 replies; 5+ messages in thread
From: dajiang @ 2010-08-28 3:57 UTC (permalink / raw)
To: u-boot
Hi, every one.
This is my first time of posting a message here, firstly , thanks for any
body who builds such a nice platform give help.
In recent two weeks, I added a NAND flash driver support for Micron's
MT29F2G08ABD (SLC;page size: x8 2048+64bytes; Block size: 64 pages; Device
size: 2Gb) memory chip base on u-boot 2009.08 for i.mx25. Block Erasing and
Page Programming functions worked properly, but when I do page reading
operation, "UnCorrectable RS-ECC Error" error message prompted. I checked
the NFC (NAND Flash Controller) spare area buffer and found that the 4th
512-byte spare area buffer's data were very weird, there is not any ECC code
that should be generated by the FEC but contained the data what I programmed
to the memory.
In order to easy to do troubleshooting works, I make a simply testing
process, what I do is, firstly, I only erase page 0 of block 0, and later I
program the erased page with a 2k file which consisted of 2048 same
character 'E', at last I read the page back , but "UnCorrectable RS-ECC
Error" occurs. I pasted the contents of NFC's spare area buffer as
following:
bb001000: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001010: b935d166 ffffffba ffffffff ffffffff f.5.............
bb001020: 5f7467b9 21650de8 4d97fbd0 3166372c .gt_..e!...M,7f1
bb001030: 3b7e8bef b1cf62a5 bb8f50f6 de0031b3 ..~;.b...P...1..
bb001040: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001050: b935d166 ffffffba ffffffff ffffffff f.5.............
bb001060: bafcf1fa 0c0698ef 09089d72 e6200c80 ........r..... .
bb001070: d638f5ef 20130b40 591dd763 e224f527 ..8. at .. c..Y'.$.
bb001080: ffffffff 66ffffff bab935d1 22446bbd .......f.5...kD"
bb001090: b935d166 ffffffba ffffffff ffffffff f.5.............
bb0010a0: 76fa88ba 7a648809 d27bbc43 6b2b81cf ...v..dzC.{...+k
bb0010b0: f6b95e3b 1286638e 73d324fb 22880ce5 ;^...c...$.s..."
bb0010c0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010d0: 45454545 45454545 45454545 45454545 EEEEEEEEEEEEEEEE
bb0010e0: 36d8f3d5 0099a9e7 eb289d07 11664624 ...6......(.$Ff.
bb0010f0: 4fbb9f24 505ab041 25ff61f6 43280406 $..OA.ZP.a.%..(C
Contents written in red characters should be ECC code, but changed to what
I programmed to the memory in preverious programming process.
Any advice, please feel free to tell me. Thanks very much in advance.
--
View this message in context: http://old.nabble.com/%22UnCorrectable-RS-ECC-Error%22-occurs-when-reading-NAND-flash-under-u-boot-2009.08-for-i.mx25-tp29558468p29558468.html
Sent from the Uboot - Users mailing list archive at Nabble.com.
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2010-08-28 3:35 [U-Boot] "UnCorrectable RS-ECC Error" occurs when reading NAND flash under u-boot 2009.08 for i.mx25 dajiang.zhong at tektronix.com
2010-08-28 4:16 ` dajiang
2010-08-30 19:36 ` Scott Wood
2010-09-01 5:35 ` dajiang
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