[U-Boot] Question on EON EN29LV160B Flash Memory

[Stefan Roese <sr@denx.de>]

On Wednesday 14 October 2009 11:20:21 SETTE AGOSTINO - technolabs wrote:
> I am going to prepare a new U-Boot with a HW which has on board an EON
>  EN29LV160B Flash Memory. As far as I see in the latest U-Boot tree this
>  kind of FLASH is not yet managed but anyhow I found some infos on EON
>  manufacturer into the file u-boot/include/flash.h and more exactly
> 
>  173 /* Manufacturers inside bank 1 have ids like 0x01xx01xx */
>  174 #define EON_MANUFACT    0x011C011C      /* EON     manuf. ID in
>  D23..D16, D7..D0 */
> 
> I have an EON EN29LV160B Flash Memory datasheet and on the Manufacturer ID
>  I have different infos which indicate differente values, as here reported
> 
>  173 /* Manufacturers inside bank 1 have ids like 0x7Fxx7Fxx */
>  174 #define EON_MANUFACT    0x7F1C7F1C      /* EON     manuf. ID in
>  D23..D16, D7..D0 */
> 
> Is this correct?

Yes, this looks correct on first glance. But I'm not really sure. I added 
Niklaus Giger to Cc, who introduced this define.

Niklaus, could you please comment here? Thanks.

> Furthermore, if I would like to add this kind of flash I have to modify,
>  add the flash type/config, the file
> 
> u-boot/drivers/mtd/jedec_flash.c
> 
> or
> 
> u-boot/drivers/mtd/cfi_flash.c

Changes in jedec_flash.c should be sufficient. Even though you need to enable 
the CFI driver (CONFIG_FLASH_CFI_DRIVER) and this JEDEC legacy driver 
(CONFIG_FLASH_CFI_LEGACY).
 
Cheers,
Stefan

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