[U-Boot] Freescale P4080 DDR problems

[York Sun <yorksun@freescale.com>]

Vitaly,


On 10/16/2013 07:53 AM, ??????? ?????????? wrote:
> Hi, i have a problem while porting u-boot to my own-developed hardware
> with P4080 and fixed DDR3 memory (not DIMM's).
> 
> Does anybody tested code for Freescale with fixed memory on real hardware?
> 
> It seems that the code does not initialize a lot of registers (for
> example DDR_WRLVL_CNTL_2 and others) in function fixed_sdram(). But it
> does this in function fsl_ddr_sdram() which i scalled if we have DIMMs.
> Currently my u-boot hangs while testing upper regions of memory.
> 
> PS. I have tested the memory with Freescale's proprietary tests (called
> DDR Validation) that use USBTAP and the test shows OK.
> 
> Can anybody give me a suggestion?
> Thank you.

The fixed parameters are very board specific. If you have successfully
validate DDR using Freescale tools, you can take those register values
and hard-code them into ddr.c. If you have some non-zero registers which
were not set, you want to add them, too.

York