Johannes Berg wrote:
On Tue, 2008-07-01 at 13:50 -0300, Henrique de Moraes Holschuh wrote:
On Tue, 01 Jul 2008, Johannes Berg wrote:
1. It has an input pin that sometimes people connect buttons/switches
to.
Does that input pin act as an input for a FLIP-FLOP (and that flip-flop
output is the hardware rfkill line), or is it the hardware rfkill line
itself?
Neither. It's not hw kill, but it's not just edge detect either, it does
have 'kill' and 'not kill' states.
What exactly the input pin does? what exactly the hardware does when
the input pin state changes?
The hardware does nothing, it just sets a bit high or low depending on
the input pin.
On my HP laptop using the RFKILL code currently in wireless-testing,
sliding the "Wireless switch" results in b43_rfkill_poll being called.
It then issues KEY_WLAN press and release events. This changes the
state of the wireless light and the contents of a read-only bit in the
status register of the device. I believe that if this bit is off, the
radio is blocked by the hardware.
Larry
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