Regarding carl9170 wifi linux driver

Hi,

We are planning to use the below wifi dongle as station and AP.

https://www.thinkpenguin.com/gnu-linux/penguin-wireless-n-usb-adapter



We got the linux driver from the below path

git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git



We found the driver source in drivers/net/wireless/ath/carl9170.



Our Question:

Is the carl9170 driver present in the above folder is a complete open
source driver?

Or is it not complete driver and is there any NON-GPL code that is not
provided as an open source?

Please clarify it. Your immediate response would be really appreciated.



Also it would be great if there is any design document or programmer’s
document for the above mentioned Wifi dongle chipset available.



Regards,

Prashant