SD card no longer operational with 2.6.24

[abraxa@…]

As described in ​http://lists.openmoko.org/pipermail/openmoko-kernel/2008-
February/000808.html the SD card does get detected but no valid partition table
is found. This behavior started after the update to 2.6.24.

[danielmewes@…]

Actually neither reading nor writing the card works correctly. When I create a
file system on /dev/mmcblk0 using my notebook's card reader, the Neo cannot read
it. Also, wenn I write some string (e.g. echo "This is a test sentence" >
/dev/mmcblk0) onto the card using a GTA01 with 2.6.24 kernel, it shows up that
only the "T" at the beginning is actually written to the card.

Perhaps there's some timing issue?

I tested using both the shipped 512 MB card as well as another 2 GB Sandisk
micro SD.

[mwester@…]

Console log, 2.6.24 kernel with micro-sd card inserted

[balrogg@…]

A quick potential fix for the only-first-byte-transferred (but probably
only-every-fourth-byte-transferred-ok) issue:

in linux-2.6/drivers/mmc/host/s3cmci.c

• *(host->pio_ptr) = readl(from_ptr);

+ *(u32 *) host->pio_ptr = readl(from_ptr);

(untested!)

[mwester@…]

Should be fixed in svn versions 4096 and beyond. (Re-open if this is not the case).