[Patch] Extended PCMCIA Support

[Kay Sievers]

On Sun, 2004-10-24 at 20:23 -0400, Dan Williams wrote:
> On Mon, 25 Oct 2004, Kay Sievers wrote:
> > Hi Dan,
> > what is the reason to include the CIS parsing into HAL? Wouldn't it be
> > easier to ask cardctl to give us these values? We may also plug into
> > the /etc/pcmcia/ directory (like the hal helpers living in 
> > /etc/hotplug.d/ and /etc/dev.d/)and send events from there to the hal
> > daemon?
> > 
> > Would that work? What do you think?
> 
> How would we ask cardctl to do the work?  I abhor screenscraping, plus you 
> get next to zero error reporting beyond exit(n).  I would actively argue 
> against opening a pipe to cardctl and reading its input.  I think my 
> current approach is quite compartmentalized and doesn't really affect HAL
> all that much.
> 
> I don't think plugging into /etc/pcmcia would help out out much either, 
> since we already get hotplug events for net devices through the hotplug 
> scripts.

Just match the two events by device name, like we do with the SEQNUM of
the dev.d/ and hotplug event. 

> Its just a case of matching up the device name (though the 
> parsing part is a bit ugly, yes.  HAL does a lot of parsing already, like 
> the PCI device/vendor name stuff.  I don't think PCMCIA is all that 
> different in this respect).

If you plug/remove in a card into the slot, cardmgr calls the scripts
in /etc/pcmcia. If I plug in an old modem, I get this in the
environment:

  $1=start
  $2=ttyS1
  MANFID=0107,0002
  PRODID_1=USRobotics 
  PRODID_2='336 Data Fax Modem'
  PRODID_3='33600 Data/14400 Fax'
  PRODID_4=0.1

We may just send that data to HAL over the domain socket, the way we
already handle hotplug and dev.d events.


> David and I are actively working to get the PCMCIA+sysfs patch into the 
> kernel ASAP, this is simply stop-gap measure until that occurs.  When that 
> happens, this patch will come out and we'll just use sysfs as normal for 
> PCMCIA devices.

Yeah kernel support would be nice.


Thanks,
Kay

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