[U-Boot] pxa310 SDHC support.

[Marek Vasut <marex@denx.de>]

On Monday, May 26, 2014 at 01:48:14 PM, aking wrote:
> On 5/26/2014 Monday 6:56 PM, Marek Vasut wrote:
> > 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.
> 
> Thank you for your answer.  are you using SD mode or SPI Mode? which
> version are you using?

I believe the pxa_mmc_gen.c is what needs to be used. There is no other PXA MMC 
driver in U-Boot mainline. I now noticed it has some basic monahans (pxa3xx) 
support too.

> > 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 .
> 
> I just have to add SD support for my board, It's emergency.  sorry for
> that.

Hmmm.

Best regards,
Marek Vasut