2Gb SD Card on Freescale MXL arm9 based board

Jun 28, 2007 5 Replies
F

Hi all, I've a self designed motherboard based on MXL demoboard, with embedded sd-card reader. I've installed linux 2.4.26-vrs1-mx1ads_0406251307. My problem is that I can read only sd-card up to 1Gb, when I insert a Sandisk 2Gb sd, I get this error:


Partition check: mmca:end_request: I/O error, dev fa:00 (mmc), sector 0 end_request: I/O error, dev fa:00 (mmc), sector 2 end_request: I/O error, dev fa:00 (mmc), sector 4 end_request: I/O error, dev fa:00 (mmc), sector 6 end_request: I/O error, dev fa:00 (mmc), sector 0 end_request: I/O error, dev fa:00 (mmc), sector 2 end_request: I/O error, dev fa:00 (mmc), sector 4 end_request: I/O error, dev fa:00 (mmc), sector 6 unable to read partition table


Could someone help me?



Thanks Best regards


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S

Hello,

Seems he tries to read sector

0 instead of 1 GB + 0 2 instead of 1 GB + 2 etc.

Do you address all of the mmc or only the first GB of memory? It looks like a "wrap around" the 8086 had (when addressing more than 1 Meg it wrapped around to the first 64 KB of memory because of missing address lines).

Don't hit me if I'm wrong.

Regards, Sebastian

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W

The problem is that 2 GByte SD cards report a read block size of 1024, but this is ONLY for the computation of the capacity.

Reading and writing blocks is always with 512 Bytes/Block.

regards

Wolfgang

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F

Thank you for your help, is possible to solve this problem?

"Wolfgang Mües" ha scritto nel messaggio news: snipped-for-privacy@server.wmsickte.xx...

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F

Thank you Sebastian, how could I hit you? :-) I have no idea about this problem, and probably you are right.

"Sebastian" ha scritto nel messaggio news:46841002$0$20297$ snipped-for-privacy@newsspool3.arcor-online.net...

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C

Top posting fixed.

You need a newer driver.

--Yan

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