diff options
| author | Luis R. Rodriguez <lrodriguez@atheros.com> | 2008-10-03 15:45:27 -0700 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-10-06 18:14:56 -0400 |
| commit | 6f255425ac3b10c3352c926e7b53e5ea1c364ca4 (patch) | |
| tree | 529cf0d1d1e9d9fdd8e9d6da67f5d99072872dc4 /drivers/net/wireless/ath9k/main.c | |
| parent | a477e4e6d48d3ac7c7a75bad40585cb391e5c237 (diff) | |
ath9k: enable ANI to help with noisy environments
This enables Adaptive Noise Immunity (ANI) on ath9k.
ANI is as algorithm designed to minimize the detrimental
effects of time-varying interferences. This should
help with throughput in noisy environments. To use
ANI we re-enable the MIB interrupt. Since ANI works
on a timer and updates the noise floor we take
advantage of this and also report a non-static noise
floor now to mac80211.
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: Jouni Malinen <Jouni.Malinen@Atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath9k/main.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/main.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 2caba440316..74726990d59 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -274,10 +274,12 @@ static void ath9k_rx_prepare(struct ath_softc *sc, rx_status->mactime = status->tsf; rx_status->band = curchan->band; rx_status->freq = curchan->center_freq; - rx_status->noise = ATH_DEFAULT_NOISE_FLOOR; + rx_status->noise = sc->sc_ani.sc_noise_floor; rx_status->signal = rx_status->noise + status->rssi; rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100)); rx_status->antenna = status->antenna; + + /* XXX Fix me, 64 cannot be the max rssi value, rigure it out */ rx_status->qual = status->rssi * 100 / 64; if (status->flags & ATH_RX_MIC_ERROR) @@ -427,6 +429,11 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc, ath_rate_newstate(sc, avp); /* Update ratectrl about the new state */ ath_rc_node_update(hw, avp->rc_node); + + /* Start ANI */ + mod_timer(&sc->sc_ani.timer, + jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL)); + } else { DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info DISSOC\n", __func__); @@ -1173,6 +1180,13 @@ static int ath9k_add_interface(struct ieee80211_hw *hw, return error; } + if (conf->type == NL80211_IFTYPE_AP) { + /* TODO: is this a suitable place to start ANI for AP mode? */ + /* Start ANI */ + mod_timer(&sc->sc_ani.timer, + jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL)); + } + return 0; } @@ -1195,6 +1209,8 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw, #ifdef CONFIG_SLOW_ANT_DIV ath_slow_ant_div_stop(&sc->sc_antdiv); #endif + /* Stop ANI */ + del_timer_sync(&sc->sc_ani.timer); /* Update ratectrl */ ath_rate_newstate(sc, avp); |