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ath9k: Run the LNA combining algorithm properly

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The LNA combining algorithm has to be run for cards
that support the required diversity features, make
sure that that correct conditions are met before
enabing this algorithm.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2013-08-07 12:54:30 +05:30 committed by John W. Linville
parent 7d845871ff
commit 16fe28e9b4
1 changed files with 30 additions and 18 deletions
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48
drivers/net/wireless/ath/ath9k/recv.c
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@ -1157,6 +1157,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
struct sk_buff *skb = NULL, *requeue_skb, *hdr_skb;
struct ieee80211_rx_status *rxs;
struct ath_hw *ah = sc->sc_ah;
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
struct ieee80211_hdr *hdr;
@ -1328,22 +1329,6 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
skb = hdr_skb;
}
if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
/*
* change the default rx antenna if rx diversity
* chooses the other antenna 3 times in a row.
*/
if (sc->rx.defant != rs.rs_antenna) {
if (++sc->rx.rxotherant >= 3)
ath_setdefantenna(sc, rs.rs_antenna);
} else {
sc->rx.rxotherant = 0;
}
}
if (rxs->flag & RX_FLAG_MMIC_STRIPPED)
skb_trim(skb, skb->len - 8);
@ -1355,8 +1340,35 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
ath_rx_ps(sc, skb, rs.is_mybeacon);
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx == 3)
ath_ant_comb_scan(sc, &rs);
/*
* Run the LNA combining algorithm only in these cases:
*
* Standalone WLAN cards with both LNA/Antenna diversity
* enabled in the EEPROM.
*
* WLAN+BT cards which are in the supported card list
* in ath_pci_id_table and the user has loaded the
* driver with "bt_ant_diversity" set to true.
*/
if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) {
/*
* Change the default rx antenna if rx diversity
* chooses the other antenna 3 times in a row.
*/
if (sc->rx.defant != rs.rs_antenna) {
if (++sc->rx.rxotherant >= 3)
ath_setdefantenna(sc, rs.rs_antenna);
} else {
sc->rx.rxotherant = 0;
}
if (pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV) {
if (common->bt_ant_diversity)
ath_ant_comb_scan(sc, &rs);
} else {
ath_ant_comb_scan(sc, &rs);
}
}
ath9k_apply_ampdu_details(sc, &rs, rxs);