fftest: Force feedback doesn't work in native mode

fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

Greetz,

The wheel: Logitech Driving Force GT (DFGT)

fftest "does" help in applying the "constant effect" in the default mode.
As soon as I shift the wheel to "native mode" through the LtWheelConf
software, the fftest starts complaining
with " Function not implemented" message.

linux-dopx:/ # fftest /dev/input/event4
Force feedback test program.
HOLD FIRMLY YOUR WHEEL OR JOYSTICK TO PREVENT DAMAGES

Device /dev/input/event4 opened
Axes query:
Effects:
Number of simultaneous effects: 0
Upload effects[0]: Function not implemented
Upload effects[1]: Function not implemented
Upload effects[2]: Function not implemented
Upload effects[3]: Function not implemented
Upload effects[4]: Function not implemented
Upload effects[5]: Function not implemented
Enter effect number, -1 to exit

The platform:

linux-dopx:/ # cat /etc/issue && uname -a
Welcome to openSUSE 11.3 "Teal" - Kernel \r (\l).
Linux linux-dopx 2.6.34-12-desktop #1 SMP PREEMPT 2010-06-29 02:39:08
+0200 x86_64 x86_64 x86_64 GNU/Linux


Please guide.
-Anisha

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

On 18 January 2012 03:58,  <simon@mungewell.org> wrote:
> Do you have the appropriate FF module built and loading in your kernel, it
> was recently moved to be enabled with 'LOGIWHEELS_FF' and is supported by
> the code in 'drivers/hid/hid-lg4ff.c'

And also, I don't have "hid-lg4ff.c" in this
"linux-dopx:/usr/src/linux-2.6.34-12/drivers/hid" path. I have
"hid-lg3ff.c" etc.
Is it responsible for the force feedback not working in the native mode?
Will I have to compile the kernel or something? :( :(

Ah, or simply download that file and put its name in the respective
Makefile? Not sure.

-Anisha

Re: fftest: Force feedback doesn't work in native mode

[simon]

> On 18 January 2012 03:58,  <simon@mungewell.org> wrote:
>> Do you have the appropriate FF module built and loading in your kernel,
>> it
>> was recently moved to be enabled with 'LOGIWHEELS_FF' and is supported
>> by
>> the code in 'drivers/hid/hid-lg4ff.c'
>
> And also, I don't have "hid-lg4ff.c" in this
> "linux-dopx:/usr/src/linux-2.6.34-12/drivers/hid" path. I have
> "hid-lg3ff.c" etc.
> Is it responsible for the force feedback not working in the native mode?
> Will I have to compile the kernel or something? :( :(
>
> Ah, or simply download that file and put its name in the respective
> Makefile? Not sure.

If you don't have it then it is probably easiest grabbing a more recent
pre-built kernel from your distribution. I suspect that SuSE has somewhere
for getting 'leading edge' kernels.

'hid-lg4ff' was improved by Michal back in August to include support for
all Logitech wheel and run them in the native mode (to get 900' rotation
etc).

A change log is here:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=history;f=drivers/hid/hid-lg4ff.c;h=6ecc9e2204409c1451e90086a4edd7f0639cdb01;hb=ccb19d263fd1c9e34948e2158c53eacbff369344

Simon

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

On 18 January 2012 22:09,  <simon@mungewell.org> wrote:
> 'hid-lg4ff' was improved by Michal back in August to include support for
> all Logitech wheel and run them in the native mode (to get 900' rotation
> etc).

Thanks for the reply, Simon.

So, today I installed OpenSuse 12.1 which has the kernel version 3.1.0.
Thankfully the file hid-lg4ff "is" present there in the hid directoy.

I saw the same file with extended code here:
http://lingrok.org/source/xref/linux-2.6-linus/drivers/hid/hid-lg4ff.c

The above linked 'hid-lg4ff' file does contain the function for the
native mode etc. and is lengthy too.
I was very much surprised on noticing that the 'hid-lg4ff' file
present in kernel version 3.1.0 of Suse 12.1 is quite small and does
NOT seem to have any function for native mode etc!

Sorry, I don't know how to use that git link which you gave. I'll try
to figure that out.

-Anisha

Re: fftest: Force feedback doesn't work in native mode

[simon]

> Sorry, I don't know how to use that git link which you gave. I'll try
> to figure that out.

It was just a web link to a gitweb page, which will give you some
information on how the file has changed over time.


Regarding SuSE's kernel, I'm not sure which version Michal changes got
into the mainline. It could be that you're looking at the early version of
'hid-lg4ff' which only supported the Logitech Wii Speedforce Wireless.

There are some 'bleeding edge' kernels packages here:
http://kernel.opensuse.org/packages
http://download.opensuse.org/repositories/Kernel:/HEAD/standard/i586/


Anyhow you caught me sitting next to my wheel.... the device will be
recognised when plug it in.
--
simon@drifter:~$ tail -f /var/log/syslog
Jan 19 00:09:27 drifter kernel: [ 9540.968028] usb 5-1: new low speed USB
device number 7 using uhci_hcd
Jan 19 00:09:27 drifter kernel: [ 9541.178081] logitech
0003:046D:C298.0006: fixing up Logitech Driving Force Pro report
descriptor
Jan 19 00:09:27 drifter kernel: [ 9541.179191] input: Logitech Logitech
Driving Force Pro as
/devices/pci0000:00/0000:00:1d.3/usb5/5-1/5-1:1.0/input/input9
Jan 19 00:09:27 drifter kernel: [ 9541.179530] logitech
0003:046D:C298.0006: input,hidraw0: USB HID v1.00 Joystick [Logitech
Logitech Driving Force Pro] on usb-0000:00:1d.3-1/input0
Jan 19 00:09:27 drifter kernel: [ 9541.179557] logitech
0003:046D:C298.0006: Force feedback for Logitech Speed Force Wireless by
Simon Wood <simon@mungewell.org>
--

And does it's turn to left/turn to right dance. Both LEDs will be lit and
it will have 900' rotation.

You can also affect the rotation range with (change ID for your USB device)
--
simon@drifter:~$ echo '450' >
/sys/bus/hid/devices/0003\:046D\:C298.0006/range
--

--
simon@drifter:~$ ffcfstress -d /dev/input/event4

        position                   center                     force
<----------*|-----------> <-----------|******----->
<-----------|******+---->^C
--

Simon.

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

On 19 January 2012 12:59,  <simon@mungewell.org> wrote:
> Regarding SuSE's kernel, I'm not sure which version Michal changes got
> into the mainline. It could be that you're looking at the early version of
> 'hid-lg4ff' which only supported the Logitech Wii Speedforce Wireless.

Thanks again, Simon.

So, since this wheel works on your system, can you tell me your kernel
version number? That'll help me to decide to which kernel version should I
upgrade to.

> There are some 'bleeding edge' kernels packages here:
> http://kernel.opensuse.org/packages
> http://download.opensuse.org/repositories/Kernel:/HEAD/standard/i586/

I too was thinking of getting a "pre-compiled" kernel version 3.2, and directly
booting from it (on Suse 12.1). Not sure if it makes sense.

Thanks again.
-Anisha

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

On 19 January 2012 20:50,  <simon@mungewell.org> wrote:
> I would suggest that you pick the latest kernel version available.

So, yesterday I did download and compile the 3.2.1 kernel, and also
installed it
successfully! But haven't tested the wheel yet.

> On that machine I have a kernel version '3.0+dfp' which is a patched build
> made when I was testing Michal's changes.

Would you please post the link of that patch here?
Reason - To make this wheel work on 10 computers, we'll have to compile the
kernel 10 times since the old configuration will have to be copied for
"make oldconfig".
That "may" result in errors in some cases. So, if I could get a patch
for kernel 3.1 (which
is by default on Suse 12.1), it may make my life easier.

Re: fftest: Force feedback doesn't work in native mode

[simon]

>> On that machine I have a kernel version '3.0+dfp' which is a patched
>> build
>> made when I was testing Michal's changes.
>
> Would you please post the link of that patch here?

It was like 8 months ago that I built it.... :-( The patches (if you need
them) are on the kernel mailing list.

> Reason - To make this wheel work on 10 computers, we'll have to compile
> the
> kernel 10 times since the old configuration will have to be copied for
> "make oldconfig".

I don't really understand why you would want to build seperately on each
machine, either grab a binary kernel RPM from the site I linked before ()
or use one machine to create your own kernel package (either RPM or just
TAR).

Does anyone really have machine specific builds these days (given disk
space is cheap and the modules system works really well)?

Simon

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

So, finally I tested this wheel on kernel 3.2.1, force feedback does
work indeed smoothly in the native mode.
Thanks to Simon for all the clues and patience.

-Anisha

Re: fftest: Force feedback doesn't work in native mode

[Anisha Kaul]

On 21 January 2012 00:20,  <simon@mungewell.org> wrote:
> I don't really understand why you would want to build seperately on each
> machine, either grab a binary kernel RPM from the site I linked before ()
> or use one machine to create your own kernel package (either RPM or just
> TAR).

:redface:

What I did was to copy the hid-lg4ff.c file on kernel 3.0.0 and change
that variable's name in the Kconfig file.
Recompiled the kernel successfully.

To my horror, after rebooting the recompiled kernel I found that
`fftest` doesn't produce the force feedback even in the "default"
mode. :banghead:

You have any idea what could I have messed up?

-Anisha