[U-Boot] pxa310 SDHC support.

Marek Vasut
2014-05-26T10:56:34Z

On Monday, May 26, 2014 at 12:28:49 PM, aking_jin wrote:
> Hi, Marek
>
> On 2014/5/26 Mon 16:59, Marek Vasut wrote:
> > On Monday, May 26, 2014 at 09:51:58 AM, aking_jin wrote:
> >> 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?
> >
> > It is well possible that the driver is broken on PXA3xx . Note that
> > mainline U- Boot doesn't really support PXA3xx . Are you working on
> > PXA3xx support for mainline U-Boot ?
>
> I'm looking for support for pxa310 MMC SDHC .
> In the PXA310 SPEC:
>
> The MMC module is based on the standards outlined in the
> MultiMediaCard System
> Specification Version 3.3.1. The SD module manages one SD or SDIO card
> based on the standards
> outlined in the SD Memory Card Specification Version 1.10 and SDIO Card
> Specification Version
> 1.0
>
> I'm doubting if the controller support SDHC (SD 2.0) ?

The PXA27x controller works even with SDXC , that is tested. I suspect there
might be some change in the PXA3xx controller, but I don't really know for sure.
You'd have to check.

Also, you didn't really answer my question with regards to porting U-Boot above.
If you do that, use latest mainline, not 2014.01 .

Best regards,
Marek Vasut