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authorFelix Fietkau <nbd@openwrt.org>2011-05-01 18:23:12 +0000
committerFelix Fietkau <nbd@openwrt.org>2011-05-01 18:23:12 +0000
commit28fb716737c4d45d977d2d19c3d9d73b781b7597 (patch)
treefee4d69e495e5fbc5c778c0d880830beacac6468 /package
parentf9a92812cfd65ac266f75970a00e2af7d225f353 (diff)
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ath9k: add a new fix for signal strength / noise measurements
SVN-Revision: 26798
Diffstat (limited to 'package')
-rw-r--r--package/mac80211/patches/570-ath9k_noise_dbm_fixup.patch88
1 files changed, 88 insertions, 0 deletions
diff --git a/package/mac80211/patches/570-ath9k_noise_dbm_fixup.patch b/package/mac80211/patches/570-ath9k_noise_dbm_fixup.patch
new file mode 100644
index 0000000..1de6b51
--- /dev/null
+++ b/package/mac80211/patches/570-ath9k_noise_dbm_fixup.patch
@@ -0,0 +1,88 @@
+--- a/drivers/net/wireless/ath/ath9k/calib.c
++++ b/drivers/net/wireless/ath/ath9k/calib.c
+@@ -365,6 +365,7 @@ bool ath9k_hw_getnf(struct ath_hw *ah, s
+
+ if (!caldata) {
+ chan->noisefloor = nf;
++ ah->noise = ath9k_hw_getchan_noise(ah, chan);
+ return false;
+ }
+
+@@ -372,6 +373,7 @@ bool ath9k_hw_getnf(struct ath_hw *ah, s
+ caldata->nfcal_pending = false;
+ ath9k_hw_update_nfcal_hist_buffer(ah, caldata, nfarray);
+ chan->noisefloor = h[0].privNF;
++ ah->noise = ath9k_hw_getchan_noise(ah, chan);
+ return true;
+ }
+
+@@ -398,10 +400,15 @@ void ath9k_init_nfcal_hist_buffer(struct
+
+ s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan)
+ {
+- if (!ah->curchan || !ah->curchan->noisefloor)
+- return ath9k_hw_get_default_nf(ah, chan);
++ s8 noise = ATH_DEFAULT_NOISE_FLOOR;
+
+- return ah->curchan->noisefloor;
++ if (chan && chan->noisefloor) {
++ s8 delta = chan->noisefloor -
++ ath9k_hw_get_default_nf(ah, chan);
++ if (delta > 0)
++ noise += delta;
++ }
++ return noise;
+ }
+ EXPORT_SYMBOL(ath9k_hw_getchan_noise);
+
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1286,6 +1286,7 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ memset(caldata, 0, sizeof(*caldata));
+ ath9k_init_nfcal_hist_buffer(ah, chan);
+ }
++ ah->noise = ath9k_hw_getchan_noise(ah, chan);
+
+ if (bChannelChange &&
+ (ah->chip_fullsleep != true) &&
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -677,6 +677,7 @@ struct ath_hw {
+ enum nl80211_iftype opmode;
+ enum ath9k_power_mode power_mode;
+
++ s8 noise;
+ struct ath9k_hw_cal_data *caldata;
+ struct ath9k_pacal_info pacal_info;
+ struct ar5416Stats stats;
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -165,7 +165,7 @@ static void ath_update_survey_nf(struct
+
+ if (chan->noisefloor) {
+ survey->filled |= SURVEY_INFO_NOISE_DBM;
+- survey->noise = chan->noisefloor;
++ survey->noise = ath9k_hw_getchan_noise(ah, chan);
+ }
+ }
+
+--- a/drivers/net/wireless/ath/ath9k/recv.c
++++ b/drivers/net/wireless/ath/ath9k/recv.c
+@@ -956,6 +956,8 @@ static int ath9k_rx_skb_preprocess(struc
+ struct ieee80211_rx_status *rx_status,
+ bool *decrypt_error)
+ {
++ struct ath_hw *ah = common->ah;
++
+ memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
+
+ /*
+@@ -976,7 +978,7 @@ static int ath9k_rx_skb_preprocess(struc
+
+ rx_status->band = hw->conf.channel->band;
+ rx_status->freq = hw->conf.channel->center_freq;
+- rx_status->signal = ATH_DEFAULT_NOISE_FLOOR + rx_stats->rs_rssi;
++ rx_status->signal = ah->noise + rx_stats->rs_rssi;
+ rx_status->antenna = rx_stats->rs_antenna;
+ rx_status->flag |= RX_FLAG_MACTIME_MPDU;
+