PCMCIA Driver Loading Problem
From: P (nospamp_at_hotmail.com)
Date: 02/25/05
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Date: 25 Feb 2005 03:31:53 -0800
Hi,
I have a peculiar problem related to pcmcia. One of the symptoms is
that when I insert the card (Actually it is not really inserted; I
unmask the card-detect bit so the cardbus driver thinks it is
inserted), the well-known "Unidentified PC Card Adapter" box pops up,
but after a second it disappears, the card is powered, the driver
loads and everything seems to work fine.
This seems strange: either one of the drivers accepts the card or none
of them does. Only in the second case the box should come, and it
should not disappear - right? As it is, the driver IS installed,
registry keys are present, the card is accepted and powered up but I
still see the box.
Further data:
WinCE 4.2
PXA255
The card is a Cisco Aironet 350
Registry is persistent
Card power and status lines are connected through I2C controlled
IO-Expander, I have to control these lines, something might be wrong
there (timing?). The code has worked well for a long time though, I
have no idea what would suddenly have changed.
I have a custom driver installed with number 01 in the card detect
sequence, to just read the vendor and product strings and save them to
registry. The entry function then returns 0 so the other drivers go on
loading. It always worked fine, and removing the key from "Detect"
does not change the behaviour.
I have compared the registry to a device that didn't have the problem
and I find nothing strange.
It has happened on four or five out of about a hundred devices.
It seems to persist after a complete shutdown (so I have been told, I
haven't tried yet).
I haven't tested much and am afraid to do a shutdown because if the
problem disappears I will most likely be unable to repeat the problem.
What I would like most is an explanation for the "Unidentified PC Card
Adapter" box disappearing after one or two seconds.
Anyone?
Regards,
Piet
pietdesomere ad yahooooo
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