Greetings!
I need some advice.
I am trying to port a EHCI driver for Linux 2.6.12
kernel on an ARM development plaform, based on the
EHCI framework in 2.4.19-rmk7 kernel. The modified
EHCI driver already works for the 2.4 kernel on the
same development board.
I have the following options:
1. Cross-compile the 2.4 USB sub-system against the
2.6 kernel with 2.4 USB sub-system headers. Basically,
I have ported the EHCI driver. I need to port usbcore
as well, which is all done (hcd.c, hub.c, usb-debug.c)
except for usb.c. Since, 2.6 uses udev compared to 2.4
devfs, I will also have to modify fs/devfs, block/
modules on which usb.c is dependant upon? Can it be
done as a module or if I do it in-built will it affect
other components? Yet to explore this further.
2. Cross-compile the 2.4 USB sub-system against the
2.6 kernel with 2.4 USB sub-system headers, but, just
modify usb.c such that it can use udev? Is this
possible?
3. Studying the entire 2.6 usb sub-system and porting
the 2.4 EHCI driver to 2.6 is a tedious process with a
time constraint :(
I would like to know as to which one will be a better
option in terms of getting the EHCI driver and usbcore
up and running.
Thanks,
SK
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