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The tty Layer

Issue 100

From Issue #100
August 2002

Jul 31, 2002  By Greg Kroah-Hartman
 in
In the first of a series of articles on device-driver development, we'll start with how the kernel handles the system console and serial ports.
Conclusion

We have covered the basics of the tty layer, explaining all of the different fields in the tty_driver structure for the 2.4 kernel tree and pointing out which ones are necessary for a driver to implement. The tiny_tty.c driver, see Listing 3 [available at ftp.linuxjournal.com/pub/lj/listings/issue100/5896.tgz], is a good example of a very minimal tty driver that successfully works. Feel free to use this code as an example for your own tty drivers in the future.

Resources

Greg Kroah-Hartman is currently the Linux USB and PCI Hot Plug kernel maintainer. He works for IBM, doing various Linux kernel-related things and can be reached at greg@kroah.com.

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Needs some explanation

Sathish Kumar's picture
Submitted by Sathish Kumar (not verified) on Thu, 09/20/2007 - 05:28.

The explanation is fine... but if we add the flow graph it will be useful for newbies.....
Please explain detail about tty driver, device, layer...... beacuse the flow is not clear

Need flow diagram

Ajay Thakur's picture
Submitted by Ajay Thakur (not verified) on Sun, 08/06/2006 - 03:24.

Yes this article is good but it takes time to understand
the flow of data from application to hardware and vice-versa.
It would be good if you can add data flow diagram.
Thanks
Ajay

Re: The tty Layer

Anonymous's picture
Submitted by Anonymous on Thu, 01/23/2003 - 03:00.

the section of "why no Read" is not clear, can you explain more ?

Re: The tty Layer

Anonymous's picture
Submitted by Anonymous on Mon, 03/22/2004 - 03:00.

Excellet article, one suggestion.
Adding a listing section which carries a Test code to perform
test on tty driver will be very usefull for newbies.

Brilliant article !!!

Romel's picture
Submitted by Romel (not verified) on Thu, 12/08/2005 - 04:24.

Brilliant article !!!
but more codes example would have been helpful for newbies like me..
thanks..
cheers
romel
INDIA

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