Am Sun, 17 Feb 2008 18:13:07 -0500 schrieb Nick Droogh <[EMAIL PROTECTED]>:
> Hi everyone, Hi Nick, > > I am looking for a driver example for a user space driver utilizing > an interrupt handler. I am having trouble registering a handler in > my driver attempt and would like to see an example of a working UIO > driver. Did you have a look at uio-howto in Documentation/DocBook/ in the kernel sources? Just do a "make htmldocs", and you get the UIO howto in html format in its own subdirectory. You don't have to "register" the userspace part of an UIO driver. You simply open /dev/uio0, mmap() your device's memory, and wait for interrupts using a blocking read() or select() on /dev/uio0. If you want to do it properly, you should use sysfs to find the right UIO device (there could be others...) and the size of the memory to map. Have a look at the sources of lsuio to see how this is done: http://www.osadl.org/projects/downloads/UIO/user/ You find the userspace part of the uio_cif driver there, too. If you still got problems after reading this, feel free to ask me. Note that I'm not subscribed to linuxppc-embedded. The preferred list for UIO questions is LKML. If you don't want to subscribe to LKML, you can also ask me by private mail. You should ask detailed questions, ideally accompanied by a piece of your code that shows the problem. Thanks, Hans _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
