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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 <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-09-03 01:40:27 +02:00 committed by John W. Linville
parent 9adcf440dc
commit 43c3528430
4 changed files with 99 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath/ath9k/ath9k.h
View File

@ -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);

32
drivers/net/wireless/ath/ath9k/init.c
View File

@ -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);
}

71
drivers/net/wireless/ath/ath9k/main.c
View File

@ -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,
};

2
drivers/net/wireless/ath/ath9k/recv.c
View File

@ -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);