Hi Sven, I've asked nbd about this some time ago. It doesn't work if you have gaps in the chain mask! Try chain mask 3 (110) and it should work with 2x2. Regards, -Julius On 06.11.2013, at 16:04, Sven Eckelmann <sven@xxxxxxxxxxxxx> wrote: > Hi, > > I've needed to test some problems with a QCA9558 Rev 0 based 3x3 2.4G device. > During these tests I've wanted to try different antenna configurations to > reduce the complexity of the problem. This was done by setting the > rxchainmask/txchainsmask to settings like 1, 5 and 7. Unfortunatelly, the > setting 5 (antenna 0 and 1) turned the device completely deaf. Here an > overview of the settings (excerpt) > > chainmask | ant 0 | ant 1 | ant 2 | Status > 1 | 1 | 0 | 0 | works > 5 | 1 | 0 | 1 | deaf > 7 | 1 | 1 | 1 | works > > The antenna setting is used in ath9k at different places but trigger seems to > be the AR_PHY_RX_CHAINMASK register write in ar9003_phy.c in the function > ar9003_hw_set_chain_masks. Forcing it to 7 instead of the requested 5 avoids > this deaf state (but makes the rx chainmask setting useless). Of course, this > is not a valid workaround and quite unexpected. > > The test platform was a current trunk OpenWrt build together with compat- > wireless 2013-02-22, compat-wireless 2013-06-27 and backports 2013-10-31. The > settings were configured using the txantenna and rxantenna of the OpenWrt > wireless config system. Both were always set to the same values during the > tests. > > The deaf state was identified using 1x1 and 2x2 clients which could receive > the beacons of the device. The QCA9558 device was then unable to receive the > probe request from the clients or any other traffic on the air. This was also > checked by a monitor (flags: control) interface on the same phy. > > Maybe someone knows whether this is a known problem with this SoC or what > information can be gathered to debug this problem further. > > Kind regards, > Sven > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@xxxxxxxxxxxxxxx > https://lists.ath9k.org/mailman/listinfo/ath9k-devel -- 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
