From 9d332c82b4cf2e4538450e4af40f073cc5e599ec Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Thu, 25 Mar 2010 14:49:31 +0900 Subject: ath5k: initialize default noise floor Initialize noise floor variable with a default of -95. This was used uninitialized in the signal strength (RSSI -> dBm) conversion until the first noise floor calibration was completed. Signed-off-by: Bruno Randolf Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/attach.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/wireless/ath/ath5k/attach.c') diff --git a/drivers/net/wireless/ath/ath5k/attach.c b/drivers/net/wireless/ath/ath5k/attach.c index dd4099a2ff15..f80d3d52c536 100644 --- a/drivers/net/wireless/ath/ath5k/attach.c +++ b/drivers/net/wireless/ath/ath5k/attach.c @@ -123,6 +123,7 @@ int ath5k_hw_attach(struct ath5k_softc *sc) ah->ah_limit_tx_retries = AR5K_INIT_TX_RETRY; ah->ah_software_retry = false; ah->ah_ant_mode = AR5K_ANTMODE_DEFAULT; + ah->ah_noise_floor = -95; /* until first NF calibration is run */ /* * Find the mac version -- cgit v1.2.3 From 2111ac0d888767999c7dd6d1309dcc1fb8012022 Mon Sep 17 00:00:00 2001 From: Bruno Randolf Date: Fri, 2 Apr 2010 18:44:08 +0900 Subject: ath5k: Adaptive Noise Immunity (ANI) Implementation This is an Adaptive Noise Imunity (ANI) implementation for ath5k. I have looked at both ath9k and HAL sources (they are nearly the same), and even though i have implemented some things differently, the basic algorithm is practically the same, for now. I hope that this can serve as a clean start to improve the algorithm later. This also adds a possibility to manually control ANI settings, right now only thru a debugfs file: * set lowest sensitivity (=highest noise immunity): echo sens-low > /sys/kernel/debug/ath5k/phy0/ani * set highest sensitivity (=lowest noise immunity): echo sens-high > /sys/kernel/debug/ath5k/phy0/ani * automatically control immunity (default): echo ani-on > /sys/kernel/debug/ath5k/phy0/ani * to see the parameters in use and watch them change: cat /sys/kernel/debug/ath5k/phy0/ani Manually setting sensitivity will turn the automatic control off. You can also control each of the five immunity parameters (noise immunity, spur immunity, firstep, ofdm weak signal detection, cck weak signal detection) manually thru the debugfs file. This is tested on AR5414 and nearly doubles the thruput in a noisy 2GHz band. Signed-off-by: Bruno Randolf Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath5k/attach.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/net/wireless/ath/ath5k/attach.c') diff --git a/drivers/net/wireless/ath/ath5k/attach.c b/drivers/net/wireless/ath/ath5k/attach.c index f80d3d52c536..dcf7c30f813f 100644 --- a/drivers/net/wireless/ath/ath5k/attach.c +++ b/drivers/net/wireless/ath/ath5k/attach.c @@ -124,6 +124,7 @@ int ath5k_hw_attach(struct ath5k_softc *sc) ah->ah_software_retry = false; ah->ah_ant_mode = AR5K_ANTMODE_DEFAULT; ah->ah_noise_floor = -95; /* until first NF calibration is run */ + sc->ani_state.ani_mode = ATH5K_ANI_MODE_AUTO; /* * Find the mac version -- cgit v1.2.3