pxa310 SDHC support.

Hi, marek
I've seen on the Internet that pxa310 support SDHC up to 32GB, but
I'm using u-boot 2014.01, It could initialize OK.

Device: PXA MMC
Manufacturer ID: 3
OEM: 5344
Name: SS08G
Tran Speed: 26000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 7.4 GiB
Bus Width: 4-bit

It shows time out while reading block . Is there any particular
process should be add?
Thank you very much.