Re: [Linuxwacom-discuss] wacom inkling as a tablet

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Dear list,

I'm Roel. The guy who's trying to get the Inkling to work with the Wacom
driver.

Thanks Chris, for providing some details on where I should start hacking
the driver.

In the following link is the source code of how I activated the HID
interface of the device:
https://github.com/roelj/inklingreader/blob/275411f269253dc72731b063307edd46f9d458b3/src/usb/online-mode.c

Do you know what these sequences of URB_CONTROL's mean?

Kind regards,
Roel

On Sun, 2014-11-16 at 11:59 -0600, Chris Bagwell wrote:
> Looks like Roel's about got it figured out.  Based on this packet
> snippet in github thread:
> 
> 02:00:00:e6:03:08:00:00:a5:0d
> I see he's got it sending pen data data.  The 02 matches with report
> ID #2 in the lsusb output:
> 
>             Item(Local ): Usage, data= [ 0x02 ] 2
>                             Pen
>             Item(Main  ): Collection, data= [ 0x01 ] 1
>                             Application
>             Item(Global): Report ID, data= [ 0x02 ] 2
> 
> 
> The next 4 bytes are X/Y as described by these fields:
> 
>             Item(Local ): Usage, data= [ 0x30 ] 48
>                             Direction-X
>             Item(Local ): Usage, data= [ 0x31 ] 49
>                             Direction-Y
>             Item(Global): Report Size, data= [ 0x10 ] 16
>             Item(Global): Report Count, data= [ 0x02 ] 2
> 
> 
> And so on.  
> 
> 
> This seems to be a full HID compliant device so in near future it may
> "just work" with latest Linux kernels.  Its probably worth booting
> Linux 3.17 kernel and see how it behaves.
> 
> Around this commit time frame they have been cleaning up kernel driver
> so that newer Wacom devices better work with generic HID input driver.
> https://github.com/torvalds/linux/commit/471d17148c8b4174ac5f5283a73316d12c4379bc
> 
> 
> In mean time you'll probably have good luck getting a custom driver
> working starting from input-wacom git repo from sourceforge page.
> 
> 
> If you search wacom mailing list you should see past examples of
> people adding their usb product ID's to wacom_wac.c file and then
> hacking up existing IRQ handlers to parse pen data for new wacom
> tablets.
> 
> I'm guessing you had to replay some USB packet to get device send pen
> data instead of mouse data?  Or to start sending any data at all?  You
> can look at wacom_sys.c::wacom_set_device_mode()  as example of
> sending that type data.
> 
> 
> Chris
> 
> 
> 
> 
> 
> 
> On Sun, Nov 16, 2014 at 7:41 AM, Isaac Marco Blancas
> <isa...@ud...> wrote:
>         Some help is needed by Roel Jansen in the inklingreader for
>         linux project. He is getting good results and needs help to
>         understand the X Y coodinates and pressure params.
>         
>         
>         You can see at
>         https://github.com/roelj/inklingreader/issues/13#issuecomment-63218429
>         
>         
>         
>         2014-10-29 17:47 GMT+01:00 Isaac Marco Blancas
>         <isa...@ud...>:
>                 I tried with the hid-recorder but there are no events
>                 when I move the pen.
>                 
>                 sudo hid-recorder -d /dev/hidraw6
>                 R: 215 05 0d 09 02 a1 01 85 02 09 02 a1 00 05 01 09 30
>                 09 31 15 00 26 80 07 35 00 46 00 78 65 11 55 0e 75 10
>                 95 02 81 02 05 0d 09 42 09 45 09 44 09 32 15 00 25 01
>                 75 01 95 04 65 00 81 02 05 09 19 01 29 04 15 00 25 01
>                 75 01 95 04 81 02 05 0d 09 30 15 00 26 00 04 75 10 95
>                 01 81 02 05 0d 09 3d 09 3e 15 81 25 7f 75 08 95 02 81
>                 02 c0 05 01 09 00 85 04 15 00 26 ff 00 75 08 95 0c 81
>                 02 05 01 09 00 85 08 15 00 26 ff 00 75 08 95 3b 81 02
>                 09 01 85 80 75 08 95 20 b1 02 c0 05 01 09 02 a1 01 85
>                 01 09 01 a1 00 05 01 09 30 09 31 15 00 26 80 07 35 00
>                 46 00 78 65 11 55 0e 75 10 95 02 81 02 05 09 19 01 29
>                 03 15 00 25 01 75 01 95 03 65 00 81 02 95 05 81 01 c0
>                 c0
>                 N: Wacom, Inc. MSC Device
>                 P: usb-0000:00:1d.0-1.1/input0
>                 I: 3 056a 0221
>                 reading debug
>                 interface /sys/kernel/debug/hid/0003:056A:0221.000A/events instead of /dev/hidraw6
>                 ^C
>                 No events where recorded.
>                 You may need to remove the option "--debugfs" to get
>                 more recordings.
>                 
>         
>         -- 
>         Isaac Marco Blancas
>         Universidad a Distancia de Madrid (UDIMA)
>         902 02 00 03
>         
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