gameport and USB joysticks/gamepads

gameport and USB joysticks/gamepads

[Luis A. Montes]

How is the gameport_register_port() supposed to be called for USB
devices? There doesn't seem to be any kernel hook for that. Is it
supposed to happen in userspace?
Also, it seems to me that gameport_register_device is always going to
add a null pointer (dev->node) to the gameport_dev_list, and that
doesn't seem terribly useful. What's the purpose of that?

Re: gameport and USB joysticks/gamepads

[Aristeu Sergio Rozanski Filho]

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Hi!
> How is the gameport_register_port() supposed to be called for USB
> devices? There doesn't seem to be any kernel hook for that. Is it
> supposed to happen in userspace?
you should use gameport_register_port() only to hardware game ports (e.g.
those found on soundcards).
USB joysticks don't need a gameport, so USB joystick drivers should call
directly input_register_device().

> Also, it seems to me that gameport_register_device is always going to
> add a null pointer (dev->node) to the gameport_dev_list, and that
> doesn't seem terribly useful. What's the purpose of that?
'node' is a kernel style linked list (struct list_head). I don't know
any URL which explains how it works but you may find it in Robert Love's
Linux Kernel Development book.

--
Aristeu


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