Ticket #1395 (closed enhancement: community)

Opened 10 years ago

Last modified 17 months ago

SDHC-Support

Reported by: openmoko@… Owned by: openmoko-kernel@…
Priority: high Milestone:
Component: u-boot Version: current svn head
Severity: minor Keywords:
Cc: buglog@… Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: PatchReviewResult:
Reproducible:

Description

Would be nice to have u-boot support SDHC-Cards.

Attachments

SampleOutputOfMMCInit.txt (527 bytes) - added by openmoko@… 10 years ago.
Sample output of mmcinit for a Kingston-4GB-SDHC-card

Change History

Changed 10 years ago by openmoko@…

Sample output of mmcinit for a Kingston-4GB-SDHC-card

comment:1 Changed 10 years ago by andy

It does support them for GTA02 / Glamo SD interface.

comment:2 Changed 10 years ago by roh

i think this can be considered 'working' quite some time.

did a quick test with freerunner prototype 85 and a sandisk 4gb microsd:

root@om-gta02:/media/card# fdisk -l /dev/mmcblk0

Disk /dev/mmcblk0: 4075 MB, 4075290624 bytes
126 heads, 62 sectors/track, 1018 cylinders
Units = cylinders of 7812 * 512 = 3999744 bytes

Device Boot Start End Blocks Id System

/dev/mmcblk0p1 1 1018 3976277 83 Linux

root@om-gta02:/media/card# df -h /dev/mmcblk0p1
Filesystem Size Used Available Use% Mounted on
/dev/mmcblk0p1 3.7G 18.2M 3.5G 1% /media/card

in my case the card is ext2 formated

but thats only valid inside a booted linux kernel.

for uboot i fear this is a wontfix since a sdhc card can still be booted via kernel in flash, and fs on sdhc

comment:3 Changed 10 years ago by andy

  • Status changed from new to closed
  • Resolution set to community

I added support for SDHC on Glamo SD in U-Boot some months ago and tested it on a 4GB Sandisk SDHC card I bought. Unlike Linux U-Boot doesn't have a protocol stack concept, so it only applies to the GTA02 driver.

Also, at that time ext2 support in U-Boot simply didn't work, you have to currently make a VFAT partition initially to hold the uImage.bin so U-Boot can parse the FS. With that done SDHC boot is fine on GTA02 (on my large sample population of 1 card, anyway).

For me, adding support for SDHC in GTA01 is a WONTFIX though, but if someone else in interested they should diff the protocol parts of the Glamo MCI driver and the s3c one in U-Boot and bring the changes over. That being the case I will close this with the new figleaf "community" (while kinda expecting this very act may spark someone to actually do it ;-) )

comment:4 Changed 17 months ago by Chassmetly

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