title: Finding the source code for Ubuntu drivers
body: <p>I recently installed the latest version of Ubuntu on my older macbook and it works great. I'm curious to read and understand the source of whichever drivers are installed by default.</p>
  
  <p>What would be the way to go in order to be able to get to the source code from the information I have on the machine? For instance, I'm trying to find the source code for the ethernet driver I have installed on the machine.</p>
  
  <p>I did an lspci, and found that I have a broadcom chip, "Broadcom Limited NetXtreme BCM57786". However, grepping through upstream kernel sources does not yield any results. How should I go about finding these drivers?</p>