On Sat, 6 Jul 2002, Himanshu Sharma wrote: > I am a student and am trying to design an ISA card. > > Can any one of you please mail me a basic char driver for a generic ISA > card. > > Any pointers will also be helpful. As James Stevenson pointed out, there are lots of drivers in the kernel which are easy to use as a template. For a simple card, you'll probably just need to implement the open/close, read/write, and maybe ioctl functions. Talking to your card is entirely a matter of how you've built your hardware. If it's based on I/O decoding then you'll want to use inb and outb. If it's memory mapped, then just dereference the address. IRQs are a slightly more complex story, but there's probably a lot to do before you start looking at those. It's a little out of date now, but I thought that Ori Pomerantz's "Linux Kernel Module Programming Guide" was a good introduction. http://www.tldp.org/LDP/lkmpg/mpg.html Regards, Paul Gearon Software Engineer Telephone: +61 7 3876 2188 Plugged In Software Fax: +61 7 3876 4899 http://www.PIsoftware.com PGP Key available via finger Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum immane mittam. (Translation from latin: "I have a catapult. Give me all the money, or I will fling an enormous rock at your head.") -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
