Re: Force feedback in Linux

Re: Force feedback in Linux

[Сергей Беляшов]

Hello
   My joystick Logitech Force 3D Pro (0x046d:0xc286) successfully
detected by current kernel (I have 2.6.27). But force feedback cannot
work properly (it works only with one axis). This joystick have 2 FF
axises (X and Y), but kernel supports only one (fftest program moves
only in X-axis): I cannot found any IOCTLs which can be used for
switching axises for force feedback effects. Also, it is no any
discussion about that.
   I want to impliment neccessary functionality but kernel redesign is
required, I think.

Best regards,
Sergey Belyashov

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Previous messages:

2009/1/2 Сергей Беляшов <sergey.belyashov@gmail.com>:
>   I have joystick Logitech Force 3D Pro which has 2 axises (X and Y)
> with force feedback. But current kernel interface does not support
> this feature (I did not found any IOCTLs which can change axis for FF
> effects). Is there any standard way to solve this task?
>
> Best regards,
> Sergey Belyashov
>



2009/1/5 Jiri Kosina <jkosina@suse.cz>:
> On Fri, 2 Jan 2009, ?????? ??????? wrote:
>
>>    I have joystick Logitech Force 3D Pro which has 2 axises (X and Y)
>> with force feedback. But current kernel interface does not support
>> this feature (I did not found any IOCTLs which can change axis for FF
>> effects). Is there any standard way to solve this task?
>
> Hi Sergey,
>
> is that joystick vendor id 0xc215? It is possible that having hid-lgff
> driver handle this joystick might be enough, but it's difficult to say
> without knowing the exact properties of the device.
>
> Thanks,
>
> --
> Jiri Kosina
> SUSE Labs
>

Re: Force feedback in Linux

[Jiri Kosina]

On Mon, 5 Jan 2009, ?????? ??????? wrote:

>    My joystick Logitech Force 3D Pro (0x046d:0xc286) successfully
> detected by current kernel (I have 2.6.27). But force feedback cannot
> work properly (it works only with one axis). This joystick have 2 FF
> axises (X and Y), but kernel supports only one (fftest program moves
> only in X-axis): I cannot found any IOCTLs which can be used for
> switching axises for force feedback effects. Also, it is no any
> discussion about that.
>    I want to impliment neccessary functionality but kernel redesign is
> required, I think.

I don't think I fully understand, sorry. What's wrong with the 'direction' 
field of struct ff_effect?

-- 
Jiri Kosina
SUSE Labs

Re: Force feedback in Linux

[Сергей Беляшов]

   Yes, you right. I did not understand purpose of field 'direction'
and this one does not directly used in hid-lgff.c. I think,
theoretically (in future?) this field may cause problems with
difficult joysticks with more than 2 independent axises with feedback
(for example, X (left/right), Y (up/down) and throttle
(forward/backward)).
   Thanks.

Best regards,
Sergey Belyashov

2009/1/6 Jiri Kosina <jkosina@suse.cz>:
> On Mon, 5 Jan 2009, ?????? ??????? wrote:
>
> I don't think I fully understand, sorry. What's wrong with the 'direction'
> field of struct ff_effect?
>
> --
> Jiri Kosina
> SUSE Labs
>