Re: [Sdio-linux-devel] #ifdef USE_CARD_DETECT_HW in HCD driver?

[Paul L. <pl...@at...>]

Boku,
The USE_CARD_DETECT_HW assumes that there is a micro-switch attached to
a GPIO line that detects card insert or removal.  The default method for
detecting insert/removal is set to SDHCD_ATTRIB_SLOT_POLLING in the
PXA270 HCD. In this case, a periodic innocuous command is sent down to
the slot to determine if the a card is present.
=20
Regards
=20
Paul

  _____ =20

From: boku [mailto:bok...@gm...]=20
Sent: Wednesday, April 25, 2007 2:19 AM
To: sdi...@li...
Subject: [Sdio-linux-devel] #ifdef USE_CARD_DETECT_HW in HCD driver?



Hi,=20
    I'm doing the host controller driver now. There is such define check
in HCD driver. What's it used for? I check PXA270/ and found it doesn't
define such variable. Therefore, how to detect the card
insertion/removal in PXA270? Thanks~=20

=20
Best Regards,
boku
=20