[U-Boot] pxa310 SDHC support.

[aking <jinxin16897123@163.com>]

On 5/26/2014 Monday 8:10 PM, Marek Vasut wrote:
> 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.
         Could you give out a log with MACRO CONFIG_MMC_TRACE on your 
pxa27x device ? any initialize ,read ,write, erase operation?
     Sorry for disturb you.
>
>>> 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


-- 
Best Regards
aking_jin