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From: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Date: Tue, 10 Mar 2015 17:49:30 +0100
Subject: [PATCH] ath9k: add DFS support for extension channel
In HT40 modes, pulse events on primary and extension
channel are processed individually. If valid, a pulse
event will be fed into the detector
* for primary frequency, or
* for extension frequency (+/-20MHz based on HT40-mode)
* or both
With that, a 40MHz radar will result in two individual
radar events.
Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
---
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -126,8 +126,19 @@ ath9k_postprocess_radar_event(struct ath
DFS_STAT_INC(sc, pulses_detected);
return true;
}
-#undef PRI_CH_RADAR_FOUND
-#undef EXT_CH_RADAR_FOUND
+
+static void
+ath9k_dfs_process_radar_pulse(struct ath_softc *sc, struct pulse_event *pe)
+{
+ struct dfs_pattern_detector *pd = sc->dfs_detector;
+ DFS_STAT_INC(sc, pulses_processed);
+ if (pd == NULL)
+ return;
+ if (!pd->add_pulse(pd, pe))
+ return;
+ DFS_STAT_INC(sc, radar_detected);
+ ieee80211_radar_detected(sc->hw);
+}
/*
* DFS: check PHY-error for radar pulse and feed the detector
@@ -176,18 +187,21 @@ void ath9k_dfs_process_phyerr(struct ath
ard.pulse_length_pri = vdata_end[-3];
pe.freq = ah->curchan->channel;
pe.ts = mactime;
- if (ath9k_postprocess_radar_event(sc, &ard, &pe)) {
- struct dfs_pattern_detector *pd = sc->dfs_detector;
- ath_dbg(common, DFS,
- "ath9k_dfs_process_phyerr: channel=%d, ts=%llu, "
- "width=%d, rssi=%d, delta_ts=%llu\n",
- pe.freq, pe.ts, pe.width, pe.rssi,
- pe.ts - sc->dfs_prev_pulse_ts);
- sc->dfs_prev_pulse_ts = pe.ts;
- DFS_STAT_INC(sc, pulses_processed);
- if (pd != NULL && pd->add_pulse(pd, &pe)) {
- DFS_STAT_INC(sc, radar_detected);
- ieee80211_radar_detected(sc->hw);
- }
+ if (!ath9k_postprocess_radar_event(sc, &ard, &pe))
+ return;
+
+ ath_dbg(common, DFS,
+ "ath9k_dfs_process_phyerr: type=%d, freq=%d, ts=%llu, "
+ "width=%d, rssi=%d, delta_ts=%llu\n",
+ ard.pulse_bw_info, pe.freq, pe.ts, pe.width, pe.rssi,
+ pe.ts - sc->dfs_prev_pulse_ts);
+ sc->dfs_prev_pulse_ts = pe.ts;
+ if (ard.pulse_bw_info & PRI_CH_RADAR_FOUND)
+ ath9k_dfs_process_radar_pulse(sc, &pe);
+ if (ard.pulse_bw_info & EXT_CH_RADAR_FOUND) {
+ pe.freq += IS_CHAN_HT40PLUS(ah->curchan) ? 20 : -20;
+ ath9k_dfs_process_radar_pulse(sc, &pe);
}
}
+#undef PRI_CH_RADAR_FOUND
+#undef EXT_CH_RADAR_FOUND
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