Re: [Madwifi-users] How to turn off a mini-PCI card with Madwifi

[Pablo O. <po...@eh...>]

Hi Tony,

El jue, 19-10-2006 a las 19:03 -0400, Tony Espy escribi=C3=B3:
> Pablo Osuna wrote:
> > I am working on a protocol to decrease the power consumption of a Wi-=
Fi
> > network. The key to do this is to turn off the wireless cards in some
> > specific periods. In order to do that with PCMCIA cards I use cardctl
> > eject command, and that works fine. My question is about mini-PCI car=
ds:
> > How can I turn off completely the mini-PCI card with madwifi driver? =
I
> > couldn't find the way to do that.
>=20
> depends on your kernel.  with 2.6, you should be able to use the=20
> standard PCI sysfs power interface to do this.
>=20
> we use this mechanism on the Pepper Pad 3 to enable users to=20
> enable/disable wifi.
>=20
> in /sysfs, each PCI device should have a sub-dir called /power.  in thi=
s=20
> dir is a file/entry called 'state'.   if you echo '3' to state, it=20
> suspends the device, '0' will wake the device up.
>=20
> in the kernel source tree, see Documentation/power/devices.txt for more=
=20
> info.

When I try to echo 3 to state I get the following error:

voyage:/sys/devices/pci0000:00/0000:00:0d.0/power# ls -la
total 0
drwxr-xr-x 2 root root    0 Jan  1 00:09 .
drwxr-xr-x 3 root root    0 Jan  1 00:08 ..
-rw-r--r-- 1 root root    0 Jan  1 00:12 state
-rw-r--r-- 1 root root 4096 Jan  1 00:09 wakeup
voyage:/sys/devices/pci0000:00/0000:00:0d.0/power# echo 3 > state
-bash: echo: write error: Invalid argument