[U-Boot-Users] SM712 + U-Boot

[Pierre AUBERT]

Hi again,

Bora Sahin wrote:

>Hi,
>
>Pierre> I don't have such information on my board. I own a DK712GX04PC00-00
>Pierre> 400029 board.
>
>The problem is here. My eva board number is also DK712GX04PC00 but I think this card is changed! I
>sent an e-mail to HyLine but they didnt help much! Only they mentioned some SW1 switch settings and
>said "For the SM712 board, SW2 is don't care, so you can put all SW2 to OFF". I deduced "this card
>can be changed" from their writings.
>
>Pierre> On the upper right corner of the board, there's two blue dip switch for configuration. The
>Pierre> SW1 is used for LCD panel configuration, and SW2 is used for memory configuration. 
>
>Yes. I think they changed the card to host either a SM712 or SM722 chip. So they allocate SW2 to
>keep the SM722 settings.
>
>Pierre> This hardware configuration is read once at boot time and could be overwritten by software.
>Pierre> The SW2:7 switch is connected on the MD6 signal of the SMI712 (on my board) which enable the
>Pierre> 32 bits memory data bus. See the SMI712 data book at paragraph 3. If your board hasn't any
>Pierre> configuration switch on the MD6 signal, you can try to modify the MCR62 register (address 3c5h,62).
>
>Thanks for the tip. Your point seems reasonable. I examined that part of the doc.(page: 169) The doc
>says it's power-on configurable. Also this pins are pulled-up. So their default value is 1 -> 64 bit
>internal bus, disable external 32 bit mem etc...
>
>I'll come back after trying it...
>
>  
>
It's possible to identify the SMI712 revision in the CSR08 register 
(Revision ID and Class Code).
Rev AA has 0xa0 as revision Id, and Rev BA has 0xb0 as revision Id.

Best regards.