Author: adrian
Date: Tue Oct 25 23:01:53 2011
New Revision: 226758
URL: http://svn.freebsd.org/changeset/base/226758
Log:
Reduce the NF wait timeout. When doing heavy 11n RX loads, this can actually
interfere with traffic, as the NF load can take quite a while and poking the
AGC every 10uS is just a bit silly.
Instead, just leave the baseband NF calibration where it is and just read it
back next time a longcal interval happens.
Modified:
head/sys/dev/ath/ath_hal/ar5416/ar5416_cal.c
Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416_cal.c
==============================================================================
--- head/sys/dev/ath/ath_hal/ar5416/ar5416_cal.c Tue Oct 25 22:47:36
2011 (r226757)
+++ head/sys/dev/ath/ath_hal/ar5416/ar5416_cal.c Tue Oct 25 23:01:53
2011 (r226758)
@@ -642,7 +642,15 @@ ar5416LoadNF(struct ath_hal *ah, const s
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
/* Wait for load to complete, should be fast, a few 10s of us. */
- if (! ar5212WaitNFCalComplete(ah, 1000)) {
+ /*
+ * XXX For now, don't be so aggressive in waiting for the NF
+ * XXX load to complete. A very busy 11n RX load will cause this
+ * XXX to always fail; so just leave it.
+ * XXX Later on we may wish to split longcal into two parts - one to do
+ * XXX the initial longcal, and one to load in an updated NF value
+ * XXX once it's finished - say, by checking it every 500ms.
+ */
+ if (! ar5212WaitNFCalComplete(ah, 5)) {
/*
* We timed out waiting for the noisefloor to load, probably
due to an
* in-progress rx. Simply return here and allow the load plenty
of time
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