cfi_make_cmd
int cfi_make_cmd(uint8_t, u_int);
done = ((st & cfi_make_cmd(0x40, sc->sc_mask)) ==
(st0 & cfi_make_cmd(0x40, sc->sc_mask))) ? 1 : 0;
cfi_write(sc, ofs, addr, cfi_make_cmd(data, sc->sc_mask));