diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2014-06-11 16:18:14 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-06-19 15:49:20 -0400 |
| commit | 42eda11558559104c09f0d0924bbb210edfcf487 (patch) | |
| tree | 70877f8508b0848b5655c4ddeb7003d455383dad /drivers/net/wireless/ath/ath9k/channel.c | |
| parent | a899b678d92fcd25215192dae26913cdb8a9b96d (diff) | |
ath9k: Add recovery mechanism for hw TSF timer
Configure the TSF based hardware timer for a channel switch.
Also set up backup software timer, in case the gen timer fails.
This could be caused by a hardware reset.
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>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/channel.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/channel.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c index 0a38eea27870..ba214ebdcd16 100644 --- a/drivers/net/wireless/ath/ath9k/channel.c +++ b/drivers/net/wireless/ath/ath9k/channel.c @@ -469,6 +469,27 @@ static void ath_chanctx_adjust_tbtt_delta(struct ath_softc *sc) prev->tsf_val += offset; } +void ath_chanctx_timer(unsigned long data) +{ + struct ath_softc *sc = (struct ath_softc *) data; + + ath_chanctx_event(sc, NULL, ATH_CHANCTX_EVENT_TSF_TIMER); +} + +/* Configure the TSF based hardware timer for a channel switch. + * Also set up backup software timer, in case the gen timer fails. + * This could be caused by a hardware reset. + */ +static void ath_chanctx_setup_timer(struct ath_softc *sc, u32 tsf_time) +{ + struct ath_hw *ah = sc->sc_ah; + + ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, tsf_time, 1000000); + tsf_time -= ath9k_hw_gettsf32(ah); + tsf_time = msecs_to_jiffies(tsf_time / 1000) + 1; + mod_timer(&sc->sched.timer, tsf_time); +} + void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, enum ath_chanctx_event ev) { @@ -566,9 +587,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, break; sc->sched.state = ATH_CHANCTX_STATE_WAIT_FOR_TIMER; - ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, - sc->sched.switch_start_time, - 1000000); + ath_chanctx_setup_timer(sc, sc->sched.switch_start_time); break; case ATH_CHANCTX_EVENT_TSF_TIMER: if (sc->sched.state != ATH_CHANCTX_STATE_WAIT_FOR_TIMER) @@ -598,8 +617,8 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, ath9k_hw_get_tsf_offset(&sc->cur_chan->tsf_ts, NULL); tsf_time += ath9k_hw_gettsf32(ah); - ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, - tsf_time, 1000000); + + ath_chanctx_setup_timer(sc, tsf_time); break; case ATH_CHANCTX_EVENT_ASSOC: if (sc->sched.state != ATH_CHANCTX_STATE_FORCE_ACTIVE || @@ -633,8 +652,7 @@ void ath_chanctx_event(struct ath_softc *sc, struct ieee80211_vif *vif, tsf_time += ath9k_hw_gettsf32(sc->sc_ah); sc->sched.switch_start_time = tsf_time; - ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, - tsf_time, 1000000); + ath_chanctx_setup_timer(sc, tsf_time); sc->sched.beacon_pending = true; break; case ATH_CHANCTX_EVENT_ENABLE_MULTICHANNEL: |