MIME-Version: 1.0
From: =?ISO-8859-1?Q?Andr=E9s_Garc=EDa_Saavedra?=
	<andres.garcia.saavedra@gmail.com>
Date: Mon, 14 Nov 2011 11:42:24 +0100
Message-ID: <CADxqDgFoO63RG67McnxUJSmxZ9ZPPnE7obKkn+MZAsoJ4UMQtg@mail.gmail.com> (sfid-20111114_114250_597140_DB6484C5)
Subject: force AR5212 to sleep
To: linux-wireless@vger.kernel.org, ath5k-devel@lists.ath5k.org
Content-Type: text/plain; charset=ISO-8859-1
Sender: linux-wireless-owner@vger.kernel.org

Hi all,

I am testing some custom algorithms for powersaving using
mac80211/ath5k. I am using? Dlink DWL-AG660 PCMCIA cards for my
experiments. For these algorithms I am notifying sleep/awake events
from mac80211 down to the driver whenever I want to. For the case of
ath5k I followed that code madwifi was using to force the chipset to
sleep (full sleep mode), find the piece of code below:

The problem is, the card (and the laptop) totally freezes whenever
this is done. According to
http://madwifi-project.org/wiki/Compatibility/D-Link this card uses a
AR5212, and madwifi driver does use this piece of code to force the
chip to sleep (in that case when resetting or stopping an interface).

Undoubtedly, I am missing something I should take care of. I'd
appreciate any "clue" you could give me.


/**** CODE *****/

??? struct ath5k_softc *sc = hw->priv;
??? struct ath5k_hw *ah = sc->ah;
??? unsigned int i;
??? u32 staid, data;

??? staid = ath5k_hw_reg_read(ah, AR5K_STA_ID1);

??? ath5k_hw_reg_write(ah, AR5K_SLEEP_CTL_SLE_ALLOW, AR5K_SLEEP_CTL);

??? staid |= AR5K_STA_ID1_PWR_SV;

??? ath5k_hw_reg_write(ah, staid, AR5K_STA_ID1);

/**** CODE *****/


Thanks in advance,
Andr?s