RE: [pci] CardBus interface

["Charles Krinke" <ckrinke@pulselink.net>]

I believe the term multifunction in the context of this mailing list and the
PCI bridge refers solely to those PCI devices that have more then one
function in a single device. This is the term as used by the PCI
specification itself. Many Intel chips such as the 82371 Northbridge that is
on many motherboards and the 80312 Companion chip that I use with the 80200
processor are multifunction devices. This means they have more then one
Vendor/DeviceID, more then one set of configuration registers and more then
one set of functions.
In each PCI device, there are several Base Address Registers. It is entirely
common for one BAR to address MEM and a second BAR to address IO space in
the same PCI device.
As for PC CARDS, dont know much about that, know a bit about PCI.
Charles

-----Original Message-----
From: owner-pci@opencores.org [mailto:owner-pci@opencores.org]On Behalf
Of random_user@163.com
Sent: Thursday, June 20, 2002 4:17 AM
To: pci@opencores.org
Subject: Re: [pci] CardBus interface


Hi,
It looks like that there is no concept of multifunction in the CardBus
specification
In my opinion,this concept
is used in the 16-bit PC CARD specification,in which a CARD can be used
only as MEM Card or I/O Card.When a card is used for both MEM and I/O
operation ,it is called multifunction Card.
But in the CardBus specification and later,the term--multifunction
appeared no more.
Am I right?If not,can you tell me what's the right ?
Thank you for any information.
And,I want to know when the PCI bridge core is modified to be used as
CardBus bridge core, what,in details,should be modified ?
Thanks.
regards,
wangc




----- Original Message -----
From: "Chandrashekar" <chandrashekar@r... >
To: <pci@o... >
Date: Thu, 20 Jun 2002 10:40:15 +0530
Subject: Re: [pci] CardBus interface

>
>
> Hi,
>
> I refered the PC Card CardBus specification document and it says
> the BAR's
> usage in case of CardBus is similar to PCI BARs. But one BAR is
> sufficient
> for one function implemented in the card. For multifunction cardbus
> cards,
> you have to use as much BAR(max 6) as the no. of multifunctions
> implemented
> in the card
>
> regards,
> Chandrashekar
>
> ----- Original Message -----
> From: <random_user@1... >
> To: <pci@o... >
> Sent: Thursday, June 20, 2002 8:09 AM
> Subject: Re: [pci] CardBus interface
>
>
> > hi,
> > I am working on CardBus interface now.
> > I think the base address registers in the conf can be used for
> CardBus in
> > the same way.Do you think so?
> >
> > regards,
> > wangc
> >
> > ----- Original Message -----
> > From: "Chandrashekar" <chandrashekar@r... >
> > To: <pci@o... >
> > Date: Wed, 19 Jun 2002 09:46:53 +0530
> > Subject: [pci] CardBus interface
> >
> > > Hi,
> > >
> > > I need to design CardBus interface. I have PCI open core
> downloaded
> > > and I have modified it to target only operation. Now I
> want to
> > > convert the PCI target only design to CardBus design. I
> am not very
> > > clear about using the Base address register in the
> configuration
> > > space for the cardbus interface. Does any one working on
> CardBus
> > > interface? or any information on cardbus interface
> design?
> > >
> > > thanks
> > > chandrashekar
> > >
> >
> >
>
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