On Friday 24 April 2009, Po-Yu Chuang wrote:
I have a board on which there is a NOR Flash SST39LF040.
Previously, I copied flash.c from other boards.
Now I am trying to migrate NOR Flash driver to use CFI, but it fails to program sectors which are not on the 0x10000 boundaries.
I found that in function flash_write_cfiword() @drivers/mtd/cfi_flash.c it issues command with address relative to sector address. However, according to SST39 series data sheet, it seems that we should issue command with address relative to flash base address?
After I modified flash_write_cfiword() to issue command to sector 0, everything works fine.
Is it a bug?
Did you define CONFIG_FLASH_CFI_LEGACY (and CONFIG_SYS_FLASH_LEGACY_512Kx8)? IIRC then the SST FLASH chips are not completely CFI compatible. So you need to enable the JEDEC framework.
Best regards, Stefan
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