2011-09-15 13:32:26

by Rajkumar Manoharan

Subject: [PATCH 1/2] ath9k: load noise floor from history after the full chip reset

Currently during the full reset, the nf calibration is always
restarted from the defaults. The noise floor history buffers are
never be used again after the scan and ath reset. This patch
ensures that nf histories are always be used that helps to
improve the signal quality on congested environment

Signed-off-by: Rajkumar Manoharan <[email protected]>
---
drivers/net/wireless/ath/ath9k/ar9002_calib.c | 1 +
drivers/net/wireless/ath/ath9k/ar9003_calib.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ar9002_calib.c b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
index 2d394af..e0ab065 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
@@ -869,6 +869,7 @@ static bool ar9002_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan)
ar9002_hw_pa_cal(ah, true);

/* Do NF Calibration after DC offset and other calibrations */
+ ath9k_hw_loadnf(ah, chan);
ath9k_hw_start_nfcal(ah, true);

if (ah->caldata)
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index 695d9d3..e4b1a83 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -885,6 +885,7 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
if (txiqcal_done)
ar9003_hw_tx_iq_cal_post_proc(ah);

+ ath9k_hw_loadnf(ah, chan);
ath9k_hw_start_nfcal(ah, true);

/* Initialize list pointers */
--
1.7.6.1

2011-09-15 13:32:25

by Rajkumar Manoharan

Subject: [PATCH 2/2] ath9k: Reset caldata on radio enable

Not doing so, the caldata continues to retain older history
values learned on that channel. It is always safer to start
noise floor calibration from the defaults after the assoication.
So this patch resets the nf history buffer when none of the
STA vifs are associated.

Signed-off-by: Rajkumar Manoharan <[email protected]>
---
drivers/net/wireless/ath/ath9k/main.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 8a17cff5..b38dc18 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2015,6 +2015,7 @@ static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif)
/* Stop ANI */
sc->sc_flags &= ~SC_OP_ANI_RUN;
del_timer_sync(&common->ani.timer);
+ memset(&sc->caldata, 0, sizeof(sc->caldata));
}
}

--
1.7.6.1