From 43c3528430bd29f5e52438cad7cf7c0c62bf4583 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 3 Sep 2011 01:40:27 +0200 Subject: [PATCH] ath9k: implement .get_antenna and .set_antenna On MIMO chips this can be used to enable/disable hardware chains, ensuring that the MCS information is updated accordingly. On non-MIMO chips with rx diversity (e.g. 9285), this configures the rx input antenna. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville --- drivers/net/wireless/ath/ath9k/ath9k.h | 2 + drivers/net/wireless/ath/ath9k/init.c | 32 +++++++++--- drivers/net/wireless/ath/ath9k/main.c | 71 ++++++++++++++++++++++++++ drivers/net/wireless/ath/ath9k/recv.c | 2 +- 4 files changed, 99 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h index b2992d4097c3..0fb4a26f8979 100644 --- a/drivers/net/wireless/ath/ath9k/ath9k.h +++ b/drivers/net/wireless/ath/ath9k/ath9k.h @@ -649,6 +649,7 @@ struct ath_softc { struct ath_descdma txsdma; struct ath_ant_comb ant_comb; + u8 ant_tx, ant_rx; }; void ath9k_tasklet(unsigned long data); @@ -669,6 +670,7 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc, const struct ath_bus_ops *bus_ops); void ath9k_deinit_device(struct ath_softc *sc); void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw); +void ath9k_reload_chainmask_settings(struct ath_softc *sc); void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw); bool ath9k_uses_beacons(int type); diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c index be302fbdc3dc..9b34c4bab937 100644 --- a/drivers/net/wireless/ath/ath9k/init.c +++ b/drivers/net/wireless/ath/ath9k/init.c @@ -653,9 +653,22 @@ static void ath9k_init_txpower_limits(struct ath_softc *sc) ah->curchan = curchan; } +void ath9k_reload_chainmask_settings(struct ath_softc *sc) +{ + if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)) + return; + + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) + setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap); + if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) + setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap); +} + + void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw) { - struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | @@ -693,6 +706,16 @@ void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw) hw->sta_data_size = sizeof(struct ath_node); hw->vif_data_size = sizeof(struct ath_vif); + hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1; + hw->wiphy->available_antennas_tx = BIT(ah->caps.max_txchains) - 1; + + /* single chain devices with rx diversity */ + if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) + hw->wiphy->available_antennas_rx = BIT(0) | BIT(1); + + sc->ant_rx = hw->wiphy->available_antennas_rx; + sc->ant_tx = hw->wiphy->available_antennas_tx; + #ifdef CONFIG_ATH9K_RATE_CONTROL hw->rate_control_algorithm = "ath9k_rate_control"; #endif @@ -704,12 +727,7 @@ void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw) hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &sc->sbands[IEEE80211_BAND_5GHZ]; - if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) { - if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) - setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap); - if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) - setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap); - } + ath9k_reload_chainmask_settings(sc); SET_IEEE80211_PERM_ADDR(hw, common->macaddr); } diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 19c78be3dc41..c8ac2ce61ffe 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -281,6 +281,22 @@ static bool ath_complete_reset(struct ath_softc *sc, bool start) ath_start_ani(common); } + if (ath9k_hw_ops(ah)->antdiv_comb_conf_get && sc->ant_rx != 3) { + struct ath_hw_antcomb_conf div_ant_conf; + u8 lna_conf; + + ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf); + + if (sc->ant_rx == 1) + lna_conf = ATH_ANT_DIV_COMB_LNA1; + else + lna_conf = ATH_ANT_DIV_COMB_LNA2; + div_ant_conf.main_lna_conf = lna_conf; + div_ant_conf.alt_lna_conf = lna_conf; + + ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf); + } + ieee80211_wake_queues(sc->hw); return true; @@ -2379,6 +2395,59 @@ static int ath9k_get_stats(struct ieee80211_hw *hw, return 0; } +static u32 fill_chainmask(u32 cap, u32 new) +{ + u32 filled = 0; + int i; + + for (i = 0; cap && new; i++, cap >>= 1) { + if (!(cap & BIT(0))) + continue; + + if (new & BIT(0)) + filled |= BIT(i); + + new >>= 1; + } + + return filled; +} + +static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) +{ + struct ath_softc *sc = hw->priv; + struct ath_hw *ah = sc->sc_ah; + + if (!rx_ant || !tx_ant) + return -EINVAL; + + sc->ant_rx = rx_ant; + sc->ant_tx = tx_ant; + + if (ah->caps.rx_chainmask == 1) + return 0; + + /* AR9100 runs into calibration issues if not all rx chains are enabled */ + if (AR_SREV_9100(ah)) + ah->rxchainmask = 0x7; + else + ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant); + + ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant); + ath9k_reload_chainmask_settings(sc); + + return 0; +} + +static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) +{ + struct ath_softc *sc = hw->priv; + + *tx_ant = sc->ant_tx; + *rx_ant = sc->ant_rx; + return 0; +} + struct ieee80211_ops ath9k_ops = { .tx = ath9k_tx, .start = ath9k_start, @@ -2405,4 +2474,6 @@ struct ieee80211_ops ath9k_ops = { .tx_frames_pending = ath9k_tx_frames_pending, .tx_last_beacon = ath9k_tx_last_beacon, .get_stats = ath9k_get_stats, + .set_antenna = ath9k_set_antenna, + .get_antenna = ath9k_get_antenna, }; diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index 9c7f905f3871..8d3e19dfe7db 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -1950,7 +1950,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp) ath_rx_ps(sc, skb); spin_unlock_irqrestore(&sc->sc_pm_lock, flags); - if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) + if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx == 3) ath_ant_comb_scan(sc, &rs); ieee80211_rx(hw, skb);