[Muscle] IFD_POWER_UP and IFD_POWER_DOWN actions inIFDHPowerICC() function?

[Geoff Elgey]

G'day,
 
Thanks for the update to the IFDHPowerICC() documentation.

One thing that interests me, however is the following note in the
documentation regarding memory cards:

  "Memory cards without an ATR should return IFD_SUCCESS on reset but 
   the Atr should be zeroed and the length should be zero"

Is an empty ATR only returned on IFD_RESET? What about on IFD_POWER_UP?

When I return a zero length ATR for IFD_POWER_UP, and use a PKCS#11
library that calls pcsclite, then I get the following pcscd error
message:

  "prothandler.c:109:PHSetProtocol() Protocol T=0 requested but
unsupported by the card"

I need to use a valid ATR here to get the PKCS#11 library to function
with my ifdhandler. 

-- Geoff

-----Original Message-----
From: muscle-bounces at lists.musclecard.com
[mailto:muscle-bounces at lists.musclecard.com] On Behalf Of Ludovic
Rousseau
Sent: Friday, 3 August 2007 5:57 AM
To: MUSCLE
Subject: Re: [Muscle] IFD_POWER_UP and IFD_POWER_DOWN actions
inIFDHPowerICC() function?

On 20/07/07, Geoff Elgey <Geoff.Elgey at quest.com> wrote:
> G'day,

Hello,

> I've written a IFD handler for a memory card, but I am now wondering 
> if I am handling the IFDHPowerICC() function correctly.
>
> The function documentation defines the 'action' parameter as follows:
>
>     * IFD_POWER_UP
>
>       Power and reset the card if not done so
>
>     * IFD_POWER_DOWN
>
>       Power down the card then power up if not done already

I updated the API documentation at [1].

> So what is the difference between "power up and reset" (the 
> IFD_POWER_UP
> action) and "power down and power up" (the IFD_POWER_DOWN action)?
>
> The IFD_POWER_DOWN case does not mention card reset after power up. 
> What does it mean (in terms of card state) to have a card that is 
> powered up but not reset?

The power down/power up cycles are down by pcscd. The driver just need
to implement the simple actions: up, down and warm reset.

bye

[1] http://pcsclite.alioth.debian.org/ifdhandler-3/node18.html

--
  Dr. Ludovic Rousseau
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