[U-Boot] FPGA detection failure on Cyclone V soc development kit

[Dinh Nguyen <dinguyen@opensource.altera.com>]

On 01/22/2016 10:35 AM, Dinh Nguyen wrote:
> On 01/21/2016 10:31 AM, Marek Vasut wrote:
>> On Thursday, January 21, 2016 at 05:20:33 PM, M?ns Rullg?rd wrote:
>>> Tom Rini <trini@konsulko.com> writes:
>>>> On Wed, Jan 20, 2016 at 08:31:30PM +0000, M?ns Rullg?rd wrote:
>>>>> I'm having a problem with u-boot 2016.01 failing to detect the FPGA on
>>>>> my Altera Cyclone V SoC Development Kit.  On startup, it simply prints
>>>>> "FPGA: Not Altera chip ID" (the ID having been read as all-zero).  No
>>>>> amount of messing with jumpers or switches makes a difference.  The
>>>>> software on the SD card included in the box appears to work, so on a
>>>>> whim I took the SPL pre-loader from this card and combined it with the
>>>>> main 2016.01 u-boot.  This makes the detection succeed, despite Marek
>>>>> baulking at this idea.  The "good" SPL identifies as "U-Boot SPL
>>>>> 2013.01.01 (Dec 04 2014 - 08:59:41)" which is a different build date
>>>>> than the main u-boot on the same SD card, so which source code version
>>>>> it was built from is anyone's guess.
>>>>>
>>>>> What's interesting is that Marek's board works with u-boot 2016.01 while
>>>>> mine fails even with the very same binary.  The boards are different
>>>>> revisions (his 100-0321003-C1, mine -E1), and the main Cyclone V chips
>>>>> are also different (his 5CSXFC6D6F31C8NES, mine 5CSXFC6D6F31C6N).
>>>>>
>>>>> Any suggestions for what to try next?
>>>>
>>>> v2016.01 release or to of tree?  If top of tree, try
>>>> http://patchwork.ozlabs.org/patch/570009/
>>>
>>> Tried release, top of tree, and top of tree with that patch.  Nothing
>>> works.
>>
>> btw. you dropped Dinh from the CC .
>>
> 
> Sorry, but I haven't had a chance to take a look at this. I'll try to
> looking this in the following week.
> 

It seems to work on older Cyclone V chips. I have the latest devkit,
which has the 5CSXFC6D6F31C6N chip, and I cannot get an FPGA ID. My
older devkit has a 5CSXFC6D6F31C8NES chip, and I can get the FPGA's ID.

I'll have ask around on what changes were done with the later Cyclone V
chips.

Dinh