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

[Stefan Roese]

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.

Hope this helps.

Best regards,
Stefan

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