[U-Boot] CFI driver and P33 64M flash

[Felix Radensky <felix@embedded-sol.com>]

Hi, Stefan

Stefan Roese wrote:
> On Thursday 25 September 2008, Felix Radensky wrote:
>   
>> I'm running U-Boot 1.3.4 on custom 460EX based board,
>> equipped with 64M P33 flash (similar to Intel P30). See
>> http://www.numonyx.com/Documents/Datasheets/314749_P33_Discrete_DS.pdf
>>
>> This flash is comprised internally of two 32M flashes.
>>     
>
> Then you have to define 2 physical chips in your U-Boot configuration.
>
>   
>> I have the following declarations in configuration file:
>>
>> #define CFG_FLASH_CFI            /* The flash is CFI compatible    */
>> #define CFG_FLASH_CFI_DRIVER        /* Use common CFI driver    */
>>
>> #define CFG_FLASH_BANKS_LIST    {CFG_FLASH_BASE}
>> #define CFG_MAX_FLASH_BANKS    1    /* max number of memory banks        */
>>     
>
> This will not work. Take a look at the lwmon5 configuration. It has a similar 
> Intel FLASH which has two chips inside:
>
> #define CFG_FLASH0              0xFC000000
> #define CFG_FLASH1              0xF8000000
> #define CFG_FLASH_BANKS_LIST    { CFG_FLASH1, CFG_FLASH0 }
>
> #define CFG_MAX_FLASH_BANKS     2
>
> ...
>
> You need to change the addresses for your 32MB version though.
>   
Using 2 flash banks works fine. Thanks a lot for a prompt reply.

Felix.