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RE: PCMCIA Slot State Location
- To: "'Gary Thomas'" <gthomas at cambridge dot redhat dot com>
- Subject: RE: [ECOS] PCMCIA Slot State Location
- From: "Trenton D. Adams" <tadams at extremeeng dot com>
- Date: Thu, 21 Jun 2001 14:19:34 -0600
- Cc: "'eCos'" <ecos-discuss at sources dot redhat dot com>
- Organization: Extreme Engineering
> -----Original Message-----
> From: gary@chez-thomas.org [mailto:gary@chez-thomas.org] On
> Behalf Of Gary Thomas
> Sent: Thursday, June 21, 2001 1:30 PM
> To: Trenton D. Adams
> Cc: eCos
> Subject: RE: [ECOS] PCMCIA Slot State Location
> On 21-Jun-2001 Trenton D. Adams wrote:
> > This is one of the lines in the assabet PCMCIA Driver.
> >
> > unsigned long new_state = *(unsigned*)SA11X0_GPIO_PIN_LEVEL;
> >
> > SA11X0_GPIO_PIN_LEVEL must obviously be a memory address
> for card slot
> > state information. Does anyone have any idea where this
> would be for
> > the EDB7111-2 board?
> >
> > Also, is the slot state information standard between all PCMCIA
> > devices?=
> No, it's specific to your platform and all depends on what
> you need to know to keep the cards & slots happy. Things
> like "is Vcc applied".
So, what you're saying is it could vary well be that I would have to
access the PCMCIA controller directly to get the information I need then
right?
> Note: the PCMCIA spec is very particular about such things,
> especially the timing of how and when certain signals and
> voltages should be applied.
>