PXA2xx pcmcia to compact flash on 2.6.13

[John Heil]

On Fri, 16 Dec 2005, Russell King wrote:

> On Thu, Dec 15, 2005 at 10:30:16PM -0800, John Heil wrote:
> > On Thu, 15 Dec 2005, Pavel Roskin wrote:
> > > Hi, John!
> > >
> > > On Thu, 2005-12-15 at 11:00 -0800, John Heil wrote:
> > > > I've done a bind_request to get ide-cs.c to manage the compact flash.
> > > > bind_request completes successfully and I then call ide_attach in
> > > > ide-cs.
> > >
> > > I guess you circumvented reading CIS by doing this.  I'm not sure if you
> > > can read CIS at all.
> >
> > Hi Pavel,
> >
> > Thnx for responding...
> >
> > Actually, bind_request calls pcmcia_device_add and that is the ioctl i/f
> > for cardmgr when it detect pcmcia hotplug.
> >
> > >
> > > > ide_attach does a pcmcia_register_client and ds.c ultimately drives
> > > > GetFirstTuple which is failing w 'No more items'
> > >
> > > This means that the client driver cannot find CIS.
> >
> > Exactly.
> >
> > My concern is that the PXA270 hardware PCMCIA area, at 0x20000000,
> > may not be correctly ioremapped by cs/ds to find where the CIS is being
> > returned at.
>
> It strikes me that it would be far simpler if you were to use the PXA
> support already present in the kernel, and maybe just hard-wire the
> card detect support to say "Card Present".

I do want to use the existing PXA kernel support.
My target driver is ide-cs. Getting PXA PCMCIA support to invoke it
is what I'm trying to do...

The board I've got differs from the reference design in that they
exchanged Intel's FPGA for a dumbed down CPLD w/o hotplug and w/o
the controlling registers Intel had in their FPGA. Thus PCMCIA card
variables such as voltage  etc are fixed.

The board will never use anything PCMCIA except  Compact Flash.

My problem is getting that ide-cs driver invoked w/o user space hotplug,
cardmgr or whatever...

By "Card Present" I presume you mean SS_DETECT ?

I'll try "Card Present" and see what it buys me...

Thnx

>
> That's probably a one or two line change to a working driver - far
> simpler than trying to do lots of modifications throughout the PCMCIA
> layer.



>
> --
> Russell King
>  Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
>  maintainer of:  2.6 Serial core
>