iwlwifi: move chain settings to agn

The core module doesn't need to carry around
the code for chain settings that is used for
HT drivers (agn) only.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 0 insertions, 141 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c
index 516c55ae38aa..dd7c3cbd2f6b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -439,12 +439,6 @@ void iwlcore_tx_cmd_protection(struct iwl_priv *priv,
 EXPORT_SYMBOL(iwlcore_tx_cmd_protection);
 
 
-static bool is_single_rx_stream(struct iwl_priv *priv)
-{
-	return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
-	       priv->current_ht_config.single_chain_sufficient;
-}
-
 static bool iwl_is_channel_extension(struct iwl_priv *priv,
 				     enum ieee80211_band band,
 				     u16 channel, u8 extension_chan_offset)
@@ -834,141 +828,6 @@ void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 }
 EXPORT_SYMBOL(iwl_set_rxon_ht);
 
-#define IWL_NUM_RX_CHAINS_MULTIPLE	3
-#define IWL_NUM_RX_CHAINS_SINGLE	2
-#define IWL_NUM_IDLE_CHAINS_DUAL	2
-#define IWL_NUM_IDLE_CHAINS_SINGLE	1
-
-/*
- * Determine how many receiver/antenna chains to use.
- *
- * More provides better reception via diversity.  Fewer saves power
- * at the expense of throughput, but only when not in powersave to
- * start with.
- *
- * MIMO (dual stream) requires at least 2, but works better with 3.
- * This does not determine *which* chains to use, just how many.
- */
-static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
-{
-	if (priv->cfg->bt_params &&
-	    priv->cfg->bt_params->advanced_bt_coexist &&
-	    (priv->bt_full_concurrent ||
-	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
-		/*
-		 * only use chain 'A' in bt high traffic load or
-		 * full concurrency mode
-		 */
-		return IWL_NUM_RX_CHAINS_SINGLE;
-	}
-	/* # of Rx chains to use when expecting MIMO. */
-	if (is_single_rx_stream(priv))
-		return IWL_NUM_RX_CHAINS_SINGLE;
-	else
-		return IWL_NUM_RX_CHAINS_MULTIPLE;
-}
-
-/*
- * When we are in power saving mode, unless device support spatial
- * multiplexing power save, use the active count for rx chain count.
- */
-static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
-{
-	/* # Rx chains when idling, depending on SMPS mode */
-	switch (priv->current_ht_config.smps) {
-	case IEEE80211_SMPS_STATIC:
-	case IEEE80211_SMPS_DYNAMIC:
-		return IWL_NUM_IDLE_CHAINS_SINGLE;
-	case IEEE80211_SMPS_OFF:
-		return active_cnt;
-	default:
-		WARN(1, "invalid SMPS mode %d",
-		     priv->current_ht_config.smps);
-		return active_cnt;
-	}
-}
-
-/* up to 4 chains */
-static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
-{
-	u8 res;
-	res = (chain_bitmap & BIT(0)) >> 0;
-	res += (chain_bitmap & BIT(1)) >> 1;
-	res += (chain_bitmap & BIT(2)) >> 2;
-	res += (chain_bitmap & BIT(3)) >> 3;
-	return res;
-}
-
-/**
- * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
- *
- * Selects how many and which Rx receivers/antennas/chains to use.
- * This should not be used for scan command ... it puts data in wrong place.
- */
-void iwl_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
-{
-	bool is_single = is_single_rx_stream(priv);
-	bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
-	u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
-	u32 active_chains;
-	u16 rx_chain;
-
-	/* Tell uCode which antennas are actually connected.
-	 * Before first association, we assume all antennas are connected.
-	 * Just after first association, iwl_chain_noise_calibration()
-	 *    checks which antennas actually *are* connected. */
-	if (priv->chain_noise_data.active_chains)
-		active_chains = priv->chain_noise_data.active_chains;
-	else
-		active_chains = priv->hw_params.valid_rx_ant;
-
-	if (priv->cfg->bt_params &&
-	    priv->cfg->bt_params->advanced_bt_coexist &&
-	    (priv->bt_full_concurrent ||
-	     priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
-		/*
-		 * only use chain 'A' in bt high traffic load or
-		 * full concurrency mode
-		 */
-		active_chains = first_antenna(active_chains);
-	}
-
-	rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
-
-	/* How many receivers should we use? */
-	active_rx_cnt = iwl_get_active_rx_chain_count(priv);
-	idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
-
-
-	/* correct rx chain count according hw settings
-	 * and chain noise calibration
-	 */
-	valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
-	if (valid_rx_cnt < active_rx_cnt)
-		active_rx_cnt = valid_rx_cnt;
-
-	if (valid_rx_cnt < idle_rx_cnt)
-		idle_rx_cnt = valid_rx_cnt;
-
-	rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
-	rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
-
-	ctx->staging.rx_chain = cpu_to_le16(rx_chain);
-
-	if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
-		ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
-	else
-		ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
-
-	IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
-			ctx->staging.rx_chain,
-			active_rx_cnt, idle_rx_cnt);
-
-	WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
-		active_rx_cnt < idle_rx_cnt);
-}
-EXPORT_SYMBOL(iwl_set_rxon_chain);
-
 /* Return valid, unused, channel for a passive scan to reset the RF */
 u8 iwl_get_single_channel_number(struct iwl_priv *priv,
 				 enum ieee80211_band band)