[U-Boot-Users] DDR-II @ MPC8343A

Andre Schwarz
2008-03-25T20:25:45Z

Kim Phillips schrieb:
> On Tue, 25 Mar 2008 20:41:41 +0100
> Andre Schwarz <andre.schwarz@matrix-vision.de> wrote:
>
>
>> Kim Phillips schrieb:
>>
>>> On Tue, 25 Mar 2008 18:36:47 +0100
>>> Andre Schwarz <andre.schwarz@matrix-vision.de> wrote:
>>>
>>>> As far as I can see there are only DDR-I boards from Freescale.
>>>>
>>>>
>>>>
>>> The MDS can do ddr2:
>>>
>>> U-Boot 1.3.2-00097-gbc508d1 (Mar 25 2008 - 10:47:17) MPC83XX
>>>
>>> Reset Status: Software Hard, External/Internal Soft, External/Internal Hard
>>>
>>> CPU: e300c1, MPC8349E, Rev: 30 at 528 MHz, CSB: 264 MHz
>>> Board: Freescale MPC8349EMDS
>>> I2C: ready
>>> SPI: ready
>>> DRAM: 256 MB (DDR2, 64-bit, ECC on)
>>> ...
>>>
>>>
>>>
>> Hmmm ... I get :
>>
>> U-Boot 1.3.2-00075-gc5f497a-dirty (Mar 25 2008 - 19:55:00) MPC83XX
>>
>> Reset Status: Check Stop, External/Internal Soft, External/Internal Hard
>>
>> CPU: e300c1, MPC8343, Rev: 31 at 399.999 MHz, CSB: 266 MHz
>> Board: Matrix Vision mvBlueLYNX-M7
>> I2C: ready
>> SPI: ready
>> DRAM: cs0_bnds = 0x0000000f
>> cs0_config = 0x80844102
>> DDR:bar=0x00000000
>> DDR:ar=0x8000001b
>> 256 MB
>>
>>
>> It's a 32-Bit DDR-II without ECC.
>> 2 Chips are soldered to CS0, i.e. no EPROM present.
>>
>> Since I expect something like "(DDR2, 32-Bit, ECC off)" and nothing
>> happens there is obviously something wrong with my memory setup.
>> Is this reasonable ?
>>
>
> sounds like memory isn't being configured correctly. Board specific?
>
Having a closer look to the boards show that I'm currently using 2
Micron MT47H256M8HG-3 with 2GBit each yielding a total of 512MByte
DDR-II memory .... this is sad :-(
Regarding to part list there should have been 1GBit Elpida chips on it.

I've seen things like this in mpc8349emds code :

#if (CFG_DDR_SIZE != 256)
#warning Currenly any ddr size other than 256 is not supported
#endif

Is this reasonable ? Why ?

>
>> Or am I simply missing a board specific "board_add_ram_info" ?
>>
>
> you can do that if you really, really, really want to see the "(DDR2.."
> string, but it's optional.
>
>
I don't want to see it but to understand where it comes from.
>> Am I assuming right that your info string "(DDR2, 64-bit, ECC on)" comes
>> from spd_sdram ?
>>
>
> yes.
>
> Kim
>

regards,
Andre

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