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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