Does anyone know of any resources (code, books, info,etc) that can help me wirte a device driver for Fedora. Possibly a usb or floppy driver. I am new to device driver programming so any help will be apreciated. Thank you.

The very *best* resource (bar none, IMHO) is this book:

Linux Device Drivers, 3rd Edition; O'Reilly
http://www.bookpool.com/sm/0596005903
<= ASSUMING YOU'RE WORKING WITH THE CURRENT, 2.6 KERNEL,
PLEASE DO *NOT* CONSIDER GETTING AN EARLIER
EDITION OF THIS BOOK

I'd also recommend:

Linux Kernel Development, 2nd Edition; Robert Love
http://www.bookpool.com/sm/0672327201
<= THIS HAS LESS CODE THAN THE O'REILLY BOOK - BUT A LOT
MORE "BACKGROUND", AND MUCH USEFUL "SAGE WISDOM"

My feeling is that the two complement each other very nicely.

'Hope that helps .. PSM

Like many things in linux, the driver must be written in C (as far as I know). Drivers are written as modules, and modules have to have their own special functions. These functions are defined in the C library.

A good book on the subject is Linux Device Drivers from o'reilly. It starts basic with a hello world module, but goes into the details fairly quickly. The book assumes you know C pretty well already. Also, drivers are pretty close to the kernel so you might want to know a bit about the kernel too. Understanding the Linux Kernel from o'reilly can help on that. However, that may be a step above a driver, since I hear that a lot of people try to learn about the kernel by writing a driver.

As far as code goes, you can learn a lot by looking at drivers from other people. This is what's nice about an open source OS: all you need to do is download the kernel source and dive into the drivers section. There have got to be hundreds in there, so you'll have plenty to work with. Learning by looking at code is a painful method though, and unless the author likes to comment a lot you may not learn much.

Hey guys thanks for your input. I've actually downloaded "Linux Device Drivers", 3rd Edition; O'Reilly and I am about to dive into it. I think is great that O'Reilly is offering the book free under an open source license. Open source is beautiful. This exchange of ideas allows you to be part of a community, and also drives innovation. Furthermore, I never thought even thought about looking at the kernel source. That will help me tremendously. Thanks again guys.

side note: I appreciate your quick responses. Linuxquestions really is a supreme Linux forum with innovative and helpful members.

I believe the free download is the 2nd edition. You do NOT - repeat: do NOT - want the 2nd edition - if you're using the 2.6 kernel.

To the best of my knowledge, the 3rd edition is only available in paperback (not electronically).

Please consider purchasing it. It's worth it. Honest!

PS:
Please consider buying Robert Love's Kernel book, too.

To the extent your personal "time" is worth anything whatsoever, an investment in these two books is a smart - a very smart - investment. IMHO...

Thanks for the Link sirclif. Thats is actually where I downloaded the Third edition of Device Drivers. Pauslm4 check out the link that sirclif provided. Also, I agree it its a good book that is definitely worth the purchase price.