[PATCH] generate by-id links for Wacom USB TabletPC devices

[PATCH] generate by-id links for Wacom USB TabletPC devices

[Danny Kukawka]

From: Danny Kukawka <danny.kukawka@web.de>
Subject: generate by-id links for Wacom USB TabletPC devices

Generate these persistent links for Wacom USB TabletPC input devices under
/dev/input/by-id/ :

 * usb-Tablet_ISD-V4-event-stylus
 * usb-Tablet_ISD-V4-stylus
 * usb-Tablet_ISD-V4-event-touch
 * usb-Tablet_ISD-V4-touch

Signed-off-by: Danny Kukawka <danny.kukawka@web.de>
---
 60-persistent-input.rules |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/rules/rules.d/60-persistent-input.rules b/rules/rules.d/60-persistent-input.rules
index 34d5ef1..a4a971d 100644
--- a/rules/rules.d/60-persistent-input.rules
+++ b/rules/rules.d/60-persistent-input.rules
@@ -15,6 +15,8 @@ DRIVERS="atkbd", ENV{ID_CLASS}="kbd"
 DRIVERS="psmouse", ENV{ID_CLASS}="mouse"
 ATTRS{name}="*dvb*|*DVB*|* IR *", ENV{ID_CLASS}="ir"
 ATTRS{modalias}="input:*-*a[068],*|input:*-*a*,[68],*m*", ATTRS{modalias}!="input:*-*k*14A,*r*", 
ENV{ID_CLASS}="joystick"
+DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4", ENV{ID_CLASS}!="mouse", ENV{ID_CLASS}="touch"
+DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4", ENV{ID_CLASS}="mouse", ENV{ID_CLASS}="stylus"
 
 # fill empty serial number
 ENV{ID_CLASS}="?*", ENV{ID_SERIAL}="", ENV{ID_SERIAL}="noserial"

Re: [PATCH] generate by-id links for Wacom USB TabletPC devices

[Kay Sievers]

On Wed, 2008-08-27 at 22:15 +0200, Danny Kukawka wrote:
> From: Danny Kukawka <danny.kukawka@web.de>
> Subject: generate by-id links for Wacom USB TabletPC devices
> 
> Generate these persistent links for Wacom USB TabletPC input devices under
> /dev/input/by-id/ :
> 
>  * usb-Tablet_ISD-V4-event-stylus
>  * usb-Tablet_ISD-V4-stylus
>  * usb-Tablet_ISD-V4-event-touch
>  * usb-Tablet_ISD-V4-touch

Where do these links point to? Care to run "tree"?

> +DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4", ENV{ID_CLASS}!="mouse", ENV{ID_CLASS}="touch"

There are also kernel "ts" input devices, "touch" sounds like a class
name for them. Is that in any way related to this class of kernel
devices? 

> +DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4", ENV{ID_CLASS}="mouse", ENV{ID_CLASS}="stylus"

Why do we rename a detected "USB mouse class" to "stylus"?

What's the difference between the two input devices this tablet creates?

Thanks,
Kay

Re: [PATCH] generate by-id links for Wacom USB TabletPC devices

[Danny Kukawka]

On Mittwoch, 27. August 2008, Kay Sievers wrote:
> On Wed, 2008-08-27 at 22:15 +0200, Danny Kukawka wrote:
> > From: Danny Kukawka <danny.kukawka@web.de>
> > Subject: generate by-id links for Wacom USB TabletPC devices
> >
> > Generate these persistent links for Wacom USB TabletPC input devices
> > under /dev/input/by-id/ :
> >
> >  * usb-Tablet_ISD-V4-event-stylus
> >  * usb-Tablet_ISD-V4-stylus
> >  * usb-Tablet_ISD-V4-event-touch
> >  * usb-Tablet_ISD-V4-touch
>
> Where do these links point to? Care to run "tree"?

For example (sorry, can't run tree, since I don't have a machine available 
with these devices) :

ls -lha /dev/input/by-id 

lrwxrwxrwx 1 root root 9 2008-08-25 12:44 usb-Tablet_ISD-V4-event-stylus ->
../event6
lrwxrwxrwx 1 root root 9 2008-08-25 12:44 usb-Tablet_ISD-V4-event-touch ->
../event7
lrwxrwxrwx 1 root root 9 2008-08-25 12:44 usb-Tablet_ISD-V4-stylus ->
../mouse2
lrwxrwxrwx 1 root root 9 2008-08-25 12:44 usb-Tablet_ISD-V4-touch ->
../mouse3

> > +DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4",
> > ENV{ID_CLASS}!="mouse", ENV{ID_CLASS}="touch"
>
> There are also kernel "ts" input devices, "touch" sounds like a class
> name for them. Is that in any way related to this class of kernel
> devices?

Sorry, I don't know. These devices are touchscreen devices.

> > +DRIVERS="wacom", ENV{ID_SERIAL}="Tablet_ISD-V4",
> > ENV{ID_CLASS}="mouse", ENV{ID_CLASS}="stylus"
>
> Why do we rename a detected "USB mouse class" to "stylus"?

Because it's the stylus device for this driver, it's easier for the user to 
identify the correct device with this naming.

> What's the difference between the two input devices this tablet creates?

The *-stylus devices handle the stylus and eraser input devices and the touch 
devices only the touchscreen device. But both are from the same USB device.

Danny