How to connect flash to CFI controller?

the cfi controller is just an interface between the avalon switch fabric and ypur external cfi via tri state bridge.

your are correct, you need to connect these signals as you mentioned.

please pay attention about the adress lines depending on data bus width and how the manufacture of the cfi flash numbers the adr. lines.

if your want to write to the cfi flash you can use the altera HAL or you need to follow the cfi flash datasheet how to "open" the cfi flash to write to specific memory blocks /areas.

as this is not a ram device where you can randomly read modify write the content you need to follow the cfi program algorithm.