On Tue, 16 February 2016 Clément VUCHENER wrote:

2016-02-16 20:45 GMT+01:00 Manuel Reimer:

quoted

On 02/15/2016 10:34 PM, Antonio Ospite wrote:  

quoted

Have you tried loading hid.ko with the ignore_special_drivers=1
parameter? I guess that will ignore _all_ special drivers tho, even
mouse and keyboard ones.  

Exactly. And so it is not what I planned to do.
 

quoted

Alan Ott's hidapi[1] is a better alternative to libusb for hid
devices.  

Of course, but just for fun, I'll at least try to use libusb directly. There
are many examples on the net. I've already collected some code snippets to
use.
 

quoted

I reckon a patched kernel is not an option, is it?  

The kernel side driver does a great job. It has minor bugs (kernel panic
when disconnecting controller while in game), but nothing too bad.

My plan is to remap to Xbox gamepad button mapping so games actually work
with the controller. In fact, I bought a brand new PS4 controller just for
my driver project. At least so far, I only own the PS3 console.

Have you tried event remapping as supported by evdev?

Have a look at EVIOCGKEYCODE and EVIOCSKEYCODE ioctls for event devices.

Those might be sufficient to perform your remapping (as long as games don't
do magic based on event device identification).

Best regards,
Bruno

quoted

What I've done so far is to write a daemon which connects to the existing
event device to get events from there, but this didn't really work as games
still see the original controller.  

Do you mean that games still see the events from the device? In that
case you can grab the event device so you are the only one that can
see the events.

If your problem is that the game only look at the first joystick
device, for SDL games, you can try the SDL_JOYSTICK_DEVICE env var
(set to the event node, not the js node IIRC) to force the use of a
specific joystick.

If the game only open /dev/input/js0, you could try to reserve it
before your gamepad is connected then replace with a new instance of
you daemon. I never had to go that far yet.

I have the same problems with my WiiU gamepad but so far I managed to
make every games work with either xboxdrv+SDL_JOYSTICK_DEVICE or with
SDL_GAMECONTROLLERCONFIG (for modern SDL games).

quoted

That's why my current plan is to connect one layer deeper so the original
event devices aren't created at all.

My reason for userspace is, that it's easier to debug and for the potential
end user it is easier to install. I just had too much trouble with dkms in
the past.

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