package/kernel/mac80211/patches/302-ath9k-add-support-for-reporting-tx-power-to-mac80211.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Wed, 22 Oct 2014 18:18:04 +0200
   3 Subject: [PATCH] ath9k: add support for reporting tx power to mac80211
   4
   5 Track it per channel context instead of in the softc
   6
   7 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   8 ---
   9
  10 --- a/drivers/net/wireless/ath/ath9k/ath9k.h
  11 +++ b/drivers/net/wireless/ath/ath9k/ath9k.h
  12 @@ -347,6 +347,7 @@ struct ath_chanctx {
  13
  14         int flush_timeout;
  15         u16 txpower;
  16 +       u16 cur_txpower;
  17         bool offchannel;
  18         bool stopped;
  19         bool active;
  20 @@ -987,7 +988,6 @@ struct ath_softc {
  21         u8 gtt_cnt;
  22         u32 intrstatus;
  23         u16 ps_flags; /* PS_* */
  24 -       u16 curtxpow;
  25         bool ps_enabled;
  26         bool ps_idle;
  27         short nbcnvifs;
  28 --- a/drivers/net/wireless/ath/ath9k/init.c
  29 +++ b/drivers/net/wireless/ath/ath9k/init.c
  30 @@ -172,17 +172,20 @@ static void ath9k_reg_notifier(struct wi
  31         ath_reg_notifier_apply(wiphy, request, reg);
  32
  33         /* Set tx power */
  34 -       if (ah->curchan) {
  35 -               sc->cur_chan->txpower = 2 * ah->curchan->chan->max_power;
  36 -               ath9k_ps_wakeup(sc);
  37 -               ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
  38 -               sc->curtxpow = ath9k_hw_regulatory(ah)->power_limit;
  39 -               /* synchronize DFS detector if regulatory domain changed */
  40 -               if (sc->dfs_detector != NULL)
  41 -                       sc->dfs_detector->set_dfs_domain(sc->dfs_detector,
  42 -                                                        request->dfs_region);
  43 -               ath9k_ps_restore(sc);
  44 -       }
  45 +       if (!ah->curchan)
  46 +               return;
  47 +
  48 +       sc->cur_chan->txpower = 2 * ah->curchan->chan->max_power;
  49 +       ath9k_ps_wakeup(sc);
  50 +       ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
  51 +       ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
  52 +                              sc->cur_chan->txpower,
  53 +                              &sc->cur_chan->cur_txpower);
  54 +       /* synchronize DFS detector if regulatory domain changed */
  55 +       if (sc->dfs_detector != NULL)
  56 +               sc->dfs_detector->set_dfs_domain(sc->dfs_detector,
  57 +                                                request->dfs_region);
  58 +       ath9k_ps_restore(sc);
  59  }
  60
  61  /*
  62 --- a/drivers/net/wireless/ath/ath9k/main.c
  63 +++ b/drivers/net/wireless/ath/ath9k/main.c
  64 @@ -233,8 +233,9 @@ static bool ath_complete_reset(struct at
  65
  66         ath9k_calculate_summary_state(sc, sc->cur_chan);
  67         ath_startrecv(sc);
  68 -       ath9k_cmn_update_txpow(ah, sc->curtxpow,
  69 -                              sc->cur_chan->txpower, &sc->curtxpow);
  70 +       ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
  71 +                              sc->cur_chan->txpower,
  72 +                              &sc->cur_chan->cur_txpower);
  73         clear_bit(ATH_OP_HW_RESET, &common->op_flags);
  74
  75         if (!sc->cur_chan->offchannel && start) {
  76 @@ -1471,8 +1472,9 @@ static int ath9k_config(struct ieee80211
  77         if (changed & IEEE80211_CONF_CHANGE_POWER) {
  78                 ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
  79                 sc->cur_chan->txpower = 2 * conf->power_level;
  80 -               ath9k_cmn_update_txpow(ah, sc->curtxpow,
  81 -                                      sc->cur_chan->txpower, &sc->curtxpow);
  82 +               ath9k_cmn_update_txpow(ah, sc->cur_chan->cur_txpower,
  83 +                                      sc->cur_chan->txpower,
  84 +                                      &sc->cur_chan->cur_txpower);
  85         }
  86
  87         mutex_unlock(&sc->mutex);
  88 @@ -2594,6 +2596,24 @@ void ath9k_fill_chanctx_ops(void)
  89
  90  #endif
  91
  92 +static int ath9k_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
  93 +                            int *dbm)
  94 +{
  95 +       struct ath_softc *sc = hw->priv;
  96 +       struct ath_vif *avp = (void *)vif->drv_priv;
  97 +
  98 +       mutex_lock(&sc->mutex);
  99 +       if (avp->chanctx)
 100 +               *dbm = avp->chanctx->cur_txpower;
 101 +       else
 102 +               *dbm = sc->cur_chan->cur_txpower;
 103 +       mutex_unlock(&sc->mutex);
 104 +
 105 +       *dbm /= 2;
 106 +
 107 +       return 0;
 108 +}
 109 +
 110  struct ieee80211_ops ath9k_ops = {
 111         .tx                 = ath9k_tx,
 112         .start              = ath9k_start,
 113 @@ -2640,4 +2660,5 @@ struct ieee80211_ops ath9k_ops = {
 114  #endif
 115         .sw_scan_start      = ath9k_sw_scan_start,
 116         .sw_scan_complete   = ath9k_sw_scan_complete,
 117 +       .get_txpower        = ath9k_get_txpower,
 118  };