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ath9k: Add periodic NoA support

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2014-06-11 16:18:11 +05:30
committed by John W. Linville
parent 73fa2f26d3
commit 7414863ed3
3 changed files with 44 additions and 8 deletions
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24
drivers/net/wireless/ath/ath9k/channel.c
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@@ -474,6 +474,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_beacon_config *cur_conf;
struct ath_vif *avp = NULL;
struct ath_chanctx *ctx;
u32 tsf_time;
@@ -514,12 +515,29 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
sc->sched.beacon_pending = true;
sc->sched.next_tbtt = REG_READ(ah, AR_NEXT_TBTT_TIMER);
cur_conf = &sc->cur_chan->beacon;
/* defer channel switch by a quarter beacon interval */
tsf_time = TU_TO_USEC(sc->cur_chan->beacon.beacon_interval);
tsf_time = TU_TO_USEC(cur_conf->beacon_interval);
tsf_time = sc->sched.next_tbtt + tsf_time / 4;
sc->sched.switch_start_time = tsf_time;
sc->cur_chan->last_beacon = sc->sched.next_tbtt;
/* Prevent wrap-around issues */
if (avp->periodic_noa_duration &&
tsf_time - avp->periodic_noa_start > BIT(30))
avp->periodic_noa_duration = 0;
if (ctx->active && !avp->periodic_noa_duration) {
avp->periodic_noa_start = tsf_time;
avp->periodic_noa_duration =
TU_TO_USEC(cur_conf->beacon_interval) / 2 -
sc->sched.channel_switch_time;
noa_changed = true;
} else if (!ctx->active && avp->periodic_noa_duration) {
avp->periodic_noa_duration = 0;
noa_changed = true;
}
if (sc->sched.offchannel_duration) {
noa_changed = true;
avp->offchannel_start = tsf_time;
@@ -575,11 +593,11 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif,
* beacon period (minus channel switch time)
*/
sc->next_chan = ath_chanctx_get_next(sc, sc->cur_chan);
cur_conf = &sc->cur_chan->beacon;
sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER;
tsf_time = ath9k_hw_gettsf32(sc->sc_ah);
tsf_time +=
TU_TO_USEC(sc->cur_chan->beacon.beacon_interval) / 2;
tsf_time += TU_TO_USEC(cur_conf->beacon_interval) / 2;
tsf_time -= sc->sched.channel_switch_time;
sc->sched.switch_start_time = tsf_time;