CardBus Power Management

[Niels_Johansen@olicom.dk]

     Hi There,
     
     I have a CardBus PM question which one of you might be able to answer 
     although this is not entirely the right forum.
     
     
     Due to the OnNow initiative CardBus devices must comply to the 
     definition of the new powerstates and register layout for handling the 
     power control, although CardBus has already a powerful built-in 
     CLKRUN# protocol for power save.
     
     The CLKRUN protocol should be used for wakeup event in D1,D2 state 
     where power is still applied on the CardBus, as far as I have 
     understood. Is this right?
     
     I'm a little confused how to signal wakeup events from the D3 state. 
     The PCI PM spec. uses INTA for wake-up (and rumors states a new wakeup 
     pin, which may address the problem with aux. power supplies in D3 
     state). However, Cardbus has already a pin for indication of 'status 
     change' called STSCHG. Should this be used for wakeup in powerstate D3 
     or should the INTA pin be used or is this 'to be defined'.
     
     
     As fas as I have understood the CardBus device must implement the new 
     PM PCI registers as a normal PCI device. Is that right???
     
     
     All answers will be greatly appreciated.
     
     
     Regards
     
     Niels Thybo Johansen
     Olicom
     
     ntj@olicom.dk
L;