wifi driver code for pci id 14e4:4315

Fri Nov 12 10:04:15 UTC 2010

Can some one point me to code which is device driver for PCI ID 14e4:4315
that is on my laptop Dell Inspiron 1440.
When I installed Ubuntu 10.04 on it , I got a message in top right
hand corner prompting to install
Broadcomm STA wireless driver.Which seems to be proprietary.If an
equivalent version of it
(Since Broadcomm recently released drivers for open source) exists
then give me a link to the same.

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