ITE Technologies, Inc. DVB-T TV Stick, part 2 - remote

[Milan Obuch]

On Sun, 8 Sep 2013 21:45:09 +0200 (CEST)
Juergen Lock <nox at jelal.kn-bremen.de> wrote:

> In article <20130830144218.0003446a at zeta.dino.sk> you write:
> >On Fri, 30 Aug 2013 08:52:17 +0200
> >Hans Petter Selasky <hps at bitfrost.no> wrote:
> >
> >> On 08/29/13 21:42, Milan Obuch wrote:
> >> > Hi,
> >> >
> >> > as now I can watch TV with my LV52T stick, I would like to find
> >> > how to use remote controller. I think this part of stick presents
> >> > itself as USB HID device, /dev/uhid0 gets created on attachment.
> >> >
> >> > As a blind shot I tried
> >> >
> >> 
> >> Hi,
> >> 
> >> Usually webcamd will grab the remote part too. Have a look at
> >> lircd.
> 
> See if you get a /dev/input/eventX device node, if yes you can test
> the remote with:
> 
> 	ir-keytable -d /dev/input/event0 -t
> 
> (or whatever one you get; ir-keytable belongs to
> multimedia/v4l-utils.) If it works you can setup lirc, see it's
> pkg-message.
>

When should /dev/input/event0 get created? I see no such file on my
system. When I put LV52T stick in, /dev/ugen4.3 and /dev/uhid0 are
created (the former is a symlink for /dev/usb/4.3.0), along
with /dev/usb/4.3.[0-5] files.

When I kldload cuse4bsd, /dev/cuse gets created.

When webcamd is running, six moew devices are created,
/dev/dvb/adapter0/demux0
/dev/dvb/adapter0/dvr0
/dev/dvb/adapter0/frontend0
/dev/dvb/adapter1/demux0
/dev/dvb/adapter1/dvr0
/dev/dvb/adapter1/frontend0

Looking at comms/lirc, it seems like it expects /dev/input/event0
already existing, so maybe webcamd should create it? If that's true,
then I need webcamd somehow patched...

> >> Not sure if it supports /dev/uhidX . You could also try uhidd.
> >> 

I installed sysutils/uhidd. Now I tried some dump:

uhidd -D /dev/ugen4.3
ugen4.3[1]-> Report descriptor dump:
        USAGE PAGE Generic Desktop(0x1)
        USAGE Keyboard(0x6)[Generic Desktop(0x1)]
        COLLECTION Application(1)
          USAGE PAGE Keyboard(0x7)
          USAGE MINIMUM Keyboard LeftControl(224)
          USAGE MAXIMUM Keyboard Right GUI(231)
          LOGICAL MINIMUM 0
          LOGICAL MAXIMUM 1
          REPORT COUNT 8
          REPORT SIZE 1
          INPUT ( Data Variable Absolute ) (2)
          REPORT COUNT 8
          REPORT SIZE 1
          INPUT ( Const Array Absolute ) (1)
          USAGE PAGE LEDs(0x8)
          USAGE MINIMUM Num Lock(1)
          USAGE MAXIMUM Scroll Lock(3)
          REPORT COUNT 3
          REPORT SIZE 1
          OUTPUT ( Data Variable Absolute ) (2)
          REPORT COUNT 1
          REPORT SIZE 5
          OUTPUT ( Const Array Absolute ) (1)
          USAGE PAGE Keyboard(0x7)
          USAGE MINIMUM Reserved (no event indicated)(0)
          USAGE MAXIMUM Unknown Usage(255)
          LOGICAL MINIMUM 0
          LOGICAL MAXIMUM 255
          REPORT COUNT 6
          REPORT SIZE 8
          INPUT ( Data Array Absolute ) (0)
        END COLLECTION
ugen4.3[1]-> Kernel driver is active
ugen4.3[1]-> Abort attach since kernel driver is active
ugen4.3[1]-> Please try running uhidd with option '-u' to detach the
kernel drivers

Adding -u to flags:

uhidd -D -u /dev/ugen4.3
ugen4.3[1]-> Report descriptor dump:
        USAGE PAGE Generic Desktop(0x1)
        USAGE Keyboard(0x6)[Generic Desktop(0x1)]
        COLLECTION Application(1)
          USAGE PAGE Keyboard(0x7)
          USAGE MINIMUM Keyboard LeftControl(224)
          USAGE MAXIMUM Keyboard Right GUI(231)
          LOGICAL MINIMUM 0
          LOGICAL MAXIMUM 1
          REPORT COUNT 8
          REPORT SIZE 1
          INPUT ( Data Variable Absolute ) (2)
          REPORT COUNT 8
          REPORT SIZE 1
          INPUT ( Const Array Absolute ) (1)
          USAGE PAGE LEDs(0x8)
          USAGE MINIMUM Num Lock(1)
          USAGE MAXIMUM Scroll Lock(3)
          REPORT COUNT 3
          REPORT SIZE 1
          OUTPUT ( Data Variable Absolute ) (2)
          REPORT COUNT 1
          REPORT SIZE 5
          OUTPUT ( Const Array Absolute ) (1)
          USAGE PAGE Keyboard(0x7)
          USAGE MINIMUM Reserved (no event indicated)(0)
          USAGE MAXIMUM Unknown Usage(255)
          LOGICAL MINIMUM 0
          LOGICAL MAXIMUM 255
          REPORT COUNT 6
          REPORT SIZE 8
          INPUT ( Data Array Absolute ) (0)
        END COLLECTION
ugen4.3[1]-> Kernel driver is active
ugen4.3[1]-> kernel driver detached!

This looks a bit promising, however usbhidd needs a config file to know
how keys should be handled...

>  I think I played once with an uhid remote and couldn't get repeat
> to work at least with lirc...  (I then patched the vdr remote plugin
> for this as vdr handles repeat differently.)
> 
> >> dd if=/dev/uhidX bs=1
> >> 
> >> --HPS
> >> 
> >
> >I tried dd but nothing happened. Still
> >
> >0+0 records in
> >0+0 records out
> >0 bytes transferred
> >
> >when I press ^T, no matter how many times I press buttons on remote.
> >
>  Well then the driver probably didn't setup the uhid part and expects
> you to use /dev/input instead...  At least I see af9035_rc_query as
> well as it913x_rc_query in
> 
> 	work/webcamd-3.11.0.2/media_tree/drivers/media/usb/dvb-usb-v2/af9035.c
> 
> and
> 
> 	work/webcamd-3.11.0.2/media_tree/drivers/media/usb/dvb-usb-v2/it913x.c
> 
> respectively (not quite sure which one your tuner uses, you could
> build webcamd with the DEBUG knob enabled and look at the log when
> starting it manually to find out, and while you're at it also look
> for logs containing "ir_mode=" and "ir_type=" if its af9035.)
> 
> >I think there is something missing or I do not understand it
> >completely, or both :)
> >
>  ..or the Linux code doesn't support your tuner's remote or (kinda
> less likely) there's still code missing in webcamd.
> 

Well, I thing I need somehow analyze USB related part of the game
unless I find the way to use uhidd... I can try to run usbdump, get some
info from usbconfig, but presently that's possibly all I can do.

Milan