Re: implement for aupcmcia

KIYOHARA Takashi wrote:
> Hi! Garrett,
>
>
> Please teach me the view of mounting to your aupcmcia. 
> the aupcmcia can attach it only one pcmcia. However, we have four register
> set. 
> Moreover, PCMCIA uses some GPIO. This will depend to the board. It just to
> the way of arm/sa11x0/sa11xx_pcic.c.  SA11xx (and PXA2x0) has pcmcia cont-
> roler (pcic).  And use some GPIO (RESET, CD[12]...).
>   
First off, aupcmcia doesn't work right now.  I'm waiting to get a logic
analyzer to figure out some problems with reads.  (Writes seem OK though.)

The way aupcmcia "works" is that it provides a single device instance
with multiple "slots".

The logic for wiring board-specific bits (like GPIOs for card detect,
power up, etc.) is placed in the board-specific code.

So, you have the master aupcmcia.c file that contains the "common" bits.

You also have e.g. evbmips/alchemy/dbau1550.c which has pcmcia related glue:

    nslots - 2 for the dbau1550
    dbau1550_slot_offset()   - returns address offset based on slot number
    dbau1550_slot_irq() - maps PCMCIA slot number to IRQ line for card IRQ#.
    dbau1550_slot_enable() - routine to power up a slot
    dbau1550_slot_disable() - routine to power down a slot
    dbau1550_slot_status() - routine to check for card presence
    dbau1550_slot_name() - routine to get the "name" of the slot

These are registered with the aupcmcia controller as an
"aupcmcia_machdep" structure in the alchemy_board structure.

Hope that helps.

    -- Garrett
>   e.g.
>   ----
>   JORNADA720 (hpcarm) is used
>     arm/sa11x0/sa11xx_pcic.c    : SA11xx generic
>     arm/sa11x0/sa11x1_pcic.c    : use companion chip and some GPIO
>
>   TWINTAIL (evbarm) is used
>     arm/sa11x0/sa11xx_pcic.c    : SA11xx generic
>     evbarm/g42xxeb/gb225_pcic.c : use companion chip and some GPIO
>
>
> Have you any idea?
> --
> kiyohara
>   


-- 
Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
http://www.tadpolecomputer.com/
Phone: 951 325-2134  Fax: 951 325-2191