[Hal] Re: [PATCH] add detection of Tablet PCs with WACOM tablet devices

[Danny Kukawka]

On Monday 15 August 2005 21:13, David Zeuthen wrote:
> Hi,
>
> sorry for me being slow,

No problem

[...] 
> +       hal_device_add_capability (d, "input");
> +       hal_device_add_capability (d, "input.tablet");
>
> Do we set properties, e.g.
>
>  input.device
>  input.physical_device
>
> that is required for having the 'input' capability? Also, what's wrong
> with just matching on pnp.id

No, we set them not. What should we set there? This device is the 
input.physical_device. 

>  WACf00[4-6]
>
> from a .fdi file and doing the setserial from there? Also, after doing
> the setserial stuff will we get a hotplug event for the input device?

The problem: if we do only a match from a fdi-file for pnp.id, we don't get 
the informtation about the serial irq and port to use setserial. Them are all 
different for every manufacturer of Tablet PCs and sometimes between models 
from one manufacturer (e.g ACER: 0x93f8/4 and 0x06f8/6, FSC:0x0220/4, 
HP/Compaq: 0x0300/4 and 0x0200/6 ...) so we can't add this to a fdi-file for 
all machines. I collected data about many different Tablet PCs for my diploma 
thesis (but not for all) and I think it's also complicated to collect this 
data (irq/port/pnp.id and dmimatch) for all and keep the information 
up-to-date. Since the kernel provides the information to sysfs HAL is the 
perfect place to parse this information.

This is a internal serial device. The information about the device come from 
the bios/dsdt. I tested if you get a hotplug event: no event if you use 
setserial. Also not from e.g. /dev/ttyS0.

> Sorry for all these questions; maybe it would easier if you showed a few
> hal-device-manager screenshots from the different stages in the
> initialization.

Questions are no problem. ;-)

Cheers, 

Danny