basic question on CFI flash and JEDEC flash

[Xiaogeng (Shawn) Jin]

A basic question on flash memory. What's the difference between CFI and 
JEDEC flash?

I'm trying to add support of AMD Am29LV642D in MTD. After looking into 
MTD device drivers, I found three source files doing flash memory probe. 
They are cfi_probe.c, jedec_probe.c and jedec.c. The comments on jedec.c 
clearly descibe its usage. But I don't quite understand the other two 
files. Literally cfi_probe.c does cfi-compliant flash probe and 
jedec_probe.c does jedec flash probe. My confusion comes from that 
jedec_probe.c actually calls many cfi-related functions. So what should 
I do to support Am29LV642D?

BTW, I successfully added Intel I28F160F3T support, which is an JEDEC 
type flash (not sure about this, :(), by adding corresponding 
information into jedec_table[].

Thanks.

- Shawn.