On Mon, 14 Nov 2011 11:42:24 +0100 Andrés García Saavedra <andres.garcia.saavedra@xxxxxxxxx> wrote: > 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ah; You must be using an outdated kernel if you have to do this. > 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); Just try one or two of those statements to see which is causing trouble. Obviously, you'll need to print staid first so that you write the same value as ath5k_hw_reg_read() returned. It's also important when you read the registers. Try adding your code to the code that already accesses those registers. -- Regards, Pavel Roskin -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
