help on selective scanning

Hi,

I wanted to perform selective scanning, ie, I specify a set of
channels or SSIDs to scan instead of all the possible channels. However
from the driver code, I found that it cannot be done, could someone please
correct me if I am wrong:

start_scan() invokes set_card_command(), which invokes the firmware to do
the job. ie, I cannot control the set of channels to scan.

Thanks in advance.
suihong