How to write a Linux device driver

VFIO!<p>The I/O MMU!<p>Write your drivers in userspace, save your sanity. I realize it's hard to get a kernel that supports everything you need to accomplish this, but it's definitely "the future" when it comes to device drivers.<p>However, this is a decent beginning point for people completely unfamiliar with writing a driver. The table and the makefile parts are especially important for beginners to <i>just get freaking started</i>.

They missed the part where you need documentation on how the chip used in the I/O device actually works. This is the 'tricky' bit way to often.

This isn't half bad. (From someone who did this for a living at one point)<p>Btw, if you're writing a USB driver, most of the time the device uses HID, even though that's for a completely different type of device then what HID is supposed to be specced for.

Has much changed for 3.0?

Thanks for the post. I tend to write python to talk to custom USB devices, but this looks like a nice alternative.