2012/8/5 Tobias Diedrich <ranma+open...@tdiedrich.de>: > Compiling OpenWRT from trunk, I've found that there are issues with > setting txpower on AR2417: > > - No txpower setting in LuCI gui > - iw phy phy0 info shows 0dBm for all channels regardless of regdomain > > [ 9.332000] cfg80211: Calling CRDA to update world regulatory domain > [ 9.340000] cfg80211: World regulatory domain updated: > [ 9.344000] cfg80211: (start_freq - end_freq @ bandwidth), > (max_antenna_gain, max_eirp) > [ 9.352000] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, > 2000 mBm) > [ 9.360000] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, > 2000 mBm) > [ 9.364000] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, > 2000 mBm) > [ 9.372000] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, > 2000 mBm) > [ 9.380000] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, > 2000 mBm) > > root@OpenWrt:/# iw phy phy0 info > Wiphy phy0 > Band 1: > Frequencies: > * 2412 MHz [1] (0.0 dBm) > * 2417 MHz [2] (0.0 dBm) > * 2422 MHz [3] (0.0 dBm) > * 2427 MHz [4] (0.0 dBm) > * 2432 MHz [5] (0.0 dBm) > * 2437 MHz [6] (0.0 dBm) > * 2442 MHz [7] (0.0 dBm) > * 2447 MHz [8] (0.0 dBm) > * 2452 MHz [9] (0.0 dBm) > * 2457 MHz [10] (0.0 dBm) > * 2462 MHz [11] (0.0 dBm) > * 2467 MHz [12] (0.0 dBm) > * 2472 MHz [13] (0.0 dBm) > * 2484 MHz [14] (disabled) > > > One issue seems to be fallout from > http://git.kernel.org/?p=linux/kernel/git/linville/wireless-next.git;a=commitdiff;h=eccc068e8e84c8fe997115629925e0422a98e4de > AFAICS max_power for the channels is never set and thus > min(chan->max_power, chan->max_reg_power) is 0. > > This patch tries to fix this (but is probably wrong :)) > After applying this patch "iw phy phy0 info" looks good, but > WiFi Analyzer on my phone still shows a very weak signal for the AP. > > Until I do this: > root@OpenWrt:/# iw phy phy0 set txpower fixed 0 > root@OpenWrt:/# iw phy phy0 set txpower auto > > And then the signal strength is good. > > iw phy phy0 set txpower fixed|limit still doesn't accept values above 0 for > some reason though. > > Index: compat-wireless-2012-07-16/drivers/net/wireless/ath/ath5k/base.c > =================================================================== > --- compat-wireless-2012-07-16.orig/drivers/net/wireless/ath/ath5k/base.c > 2012-08-05 01:42:19.141413438 +0200 > +++ compat-wireless-2012-07-16/drivers/net/wireless/ath/ath5k/base.c > 2012-08-05 01:44:19.957568271 +0200 > @@ -325,6 +325,8 @@ > if (!ath5k_is_standard_channel(ch, band)) > continue; > > + channels[count].max_power = AR5K_TUNE_MAX_TXPOWER; > + > count++; > } > > > -- > Tobias PGP: http://8ef7ddba.uguu.de
You can try to enable TPC, that'll use the tx power passed to tx descriptors instead of the global tx power limit per-rate. #define AR5K_TUNE_TPC_TXPOWER false -> true -- GPG ID: 0xEE878588 As you read this post global entropy rises. Have Fun ;-) Nick _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
