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Reduce the NF wait timeout. When doing heavy 11n RX loads, this can actually

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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.
This commit is contained in:
Adrian Chadd 2011-10-25 23:01:53 +00:00
parent d6dddab8dd
commit 24f5f7ee4e
1 changed files with 9 additions and 1 deletions
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10
sys/dev/ath/ath_hal/ar5416/ar5416_cal.c
View file

@ -642,7 +642,15 @@ ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *chan)
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