[U-Boot] pxa310 SDHC support.

Marek Vasut
2014-05-26T12:10:23Z

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