Hi all, a very basic Question 2 u all. what is asmlinkage?? it's a macro i think (not sure!!). what is it's use. thanks mandeep -----Original Message----- From: Greg KH [mailto:greg@kroah.com] Sent: Thursday, December 04, 2003 5:59 AM To: Mandeep Singh Sandhu Cc: kernelnewbies@nl.linux.org Subject: Re: Want to write a serial driver. where do i start from & how?? On Wed, Dec 03, 2003 at 01:15:15PM +0530, Mandeep Singh Sandhu wrote: > Hi All, > > i'm slightly new to the funda of writing device drivers. I started by > writing an in-memory buffer(character driver) like the one shown in > Alessandro rubini's Device Driver book (SCULL). I implemented the > basic fxns for my device like open/close, read/write and IOCTL's. I > now want to write a very basic serial driver for the serial port on my > PC. I was planning to put a LED on the port and then switching it > on/off by issuing IOCTL's to my driver. Someone suggested that i look > at the serial.c code to start, but that code has a lot of things as it > is a fully functional driver. There are a lot of things that i do not > understand in it. i need to know things like what r the barebone fxns > that i need to implement for my driver to work apart from the init and > exit fxns.If i make my own structure to represent the serial device > what all should be there in it. Can anyone suggest some pointers on > where and how to start. There have been a few Linux Journal articles in the past year or so about how to write tty and serial port drivers. I suggest starting there. Good luck, greg k-h -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
