Add TPC capability to TX descriptor path for AR9002 based chips. Scale
per-packet TX power according to eeprom power bias, power adjustments for
HT40 mode and open loop CCK rates. Cap per-packet TX power according to
TX power per-rate tables
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@xxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/xmit.c | 68 ++++++++++++++++++++++++++++-------
1 file changed, 56 insertions(+), 12 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 52d63de..9c332f9 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -1097,24 +1097,65 @@ void ath_update_max_aggr_framelen(struct ath_softc *sc, int queue, int txop)
}
static u8 ath_get_rate_txpower(struct ath_softc *sc, struct ath_buf *bf,
- u8 rateidx)
+ u8 rateidx, bool is_40, bool is_cck)
{
u8 max_power;
+ struct sk_buff *skb;
+ struct ath_frame_info *fi;
+ struct ieee80211_tx_info *info;
struct ath_hw *ah = sc->sc_ah;
- if (sc->tx99_state)
+ if (sc->tx99_state || !ah->tpc_enabled)
return MAX_RATE_POWER;
+ skb = bf->bf_mpdu;
+ fi = get_frame_info(skb);
+ info = IEEE80211_SKB_CB(skb);
+
if (!AR_SREV_9300_20_OR_LATER(ah)) {
- /* ar9002 does not support TPC for the moment */
- return MAX_RATE_POWER;
- }
+ int txpower = fi->tx_power;
- if (!bf->bf_state.bfs_paprd) {
- struct sk_buff *skb = bf->bf_mpdu;
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ath_frame_info *fi = get_frame_info(skb);
+ if (is_40) {
+ u8 power_ht40delta;
+ struct ar5416_eeprom_def *eep = &ah->eeprom.def;
+ if (AR5416_VER_MASK >= AR5416_EEP_MINOR_VER_2) {
+ bool is_2ghz;
+ struct modal_eep_header *pmodal;
+
+ is_2ghz = info->band == IEEE80211_BAND_2GHZ;
+ pmodal = &eep->modalHeader[is_2ghz];
+ power_ht40delta = pmodal->ht40PowerIncForPdadc;
+ } else {
+ power_ht40delta = 2;
+ }
+ txpower += power_ht40delta;
+ }
+
+ if (AR_SREV_9287(ah) || AR_SREV_9285(ah) ||
+ AR_SREV_9271(ah)) {
+ txpower -= 2 * AR9287_PWR_TABLE_OFFSET_DB;
+ } else if (AR_SREV_9280_20_OR_LATER(ah)) {
+ s8 power_offset;
+
+ power_offset = ah->eep_ops->get_eeprom(ah,
+ EEP_PWR_TABLE_OFFSET);
+ txpower -= 2 * power_offset;
+ }
+
+ if (OLC_FOR_AR9280_20_LATER && is_cck)
+ txpower -= 2;
+
+ txpower = max(txpower, 0);
+ max_power = min_t(u8, ah->tx_power[rateidx], txpower);
+
+ /* XXX: clamp minimum TX power at 1 for AR9160 since if
+ * max_power is set to 0, frames are transmitted at max
+ * TX power
+ */
+ if (!max_power && !AR_SREV_9280_20_OR_LATER(ah))
+ max_power = 1;
+ } else if (!bf->bf_state.bfs_paprd) {
if (rateidx < 8 && (info->flags & IEEE80211_TX_CTL_STBC))
max_power = min(ah->tx_power_stbc[rateidx],
fi->tx_power);
@@ -1152,7 +1193,7 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf,
info->rtscts_rate = fi->rtscts_rate;
for (i = 0; i < ARRAY_SIZE(bf->rates); i++) {
- bool is_40, is_sgi, is_sp;
+ bool is_40, is_sgi, is_sp, is_cck;
int phy;
if (!rates[i].count || (rates[i].idx < 0))
@@ -1198,7 +1239,8 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf,
if (rix < 8 && (tx_info->flags & IEEE80211_TX_CTL_STBC))
info->rates[i].RateFlags |= ATH9K_RATESERIES_STBC;
- info->txpower[i] = ath_get_rate_txpower(sc, bf, rix);
+ info->txpower[i] = ath_get_rate_txpower(sc, bf, rix,
+ is_40, false);
continue;
}
@@ -1227,7 +1269,9 @@ static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf,
info->rates[i].PktDuration = ath9k_hw_computetxtime(sc->sc_ah,
phy, rate->bitrate * 100, len, rix, is_sp);
- info->txpower[i] = ath_get_rate_txpower(sc, bf, rix);
+ is_cck = IS_CCK_RATE(info->rates[i].Rate);
+ info->txpower[i] = ath_get_rate_txpower(sc, bf, rix, false,
+ is_cck);
}
/* For AR5416 - RTS cannot be followed by a frame larger than 8K */
--
2.1.0
--
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