[U-Boot-Users] U-boot ColdFire development

[Stefan Roese <sr@denx.de>]

Hi TsiChung,

On Tuesday 03 July 2007, Liew Tsi Chung-r5aahp wrote:
> The CFG_FLASH_USE_BUFFER_WRITE does not help in this case because the intel
> flash chip on M5329EVB does not support Buffer Write. (It could be verified
> by reading the CFI at offset 0x2a)

Which chips is it? Just curious.

> I were doing an experiment days ago by redirected some of the CFI driver
> functions to board specific flash driver functions. I replaced
> flash_write_cfiword() in write_buff() to write_data(). Program the flash
> for 1MB. flash_add_byte() is ~5s more than total time in board specific
> flash driver. Replaced the write_data() flash status check in while loop -
> while ((*addr & (u16) FLASH_STATUS_DONE) != (u16) FLASH_STATUS_DONE) to
> while(!flash_isset (info, sec, 0, FLASH_STATUS_DONE)), this will add
> another ~11s.

Seems there is some need to enhance the CFI driver. Unfortunately we don't 
have an custodian for this anymore.

> There are some overhead in the CFI flash driver for non Buffer Write.
> Anyway, I am going to use the CFI flash driver from now on.

Thanks. We should keep in mind to address you thoughts about speed improvement 
later.

Best regards,
Stefan

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