Cambridge Silicon Radio, Ltd Bluetooth Dongle driver for Linux

I plugged the dongle into a Linux computer, it does not recognize it. I used lsusb command, the second line has the dongle's name: Cambridge Silicon Radio, Ltd Bluetooth Dongle. Now it seems like I am missing a driver for this dongle. I went into the CSR official website and found the driver. But these are for Windows. My computer is Linux. Can I found the driver for Linux in another site or Linux is unsupported for this dongle.