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

Felix Radensky
2008-09-25T16:08:19Z

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.