iwlwifi: support different num of tx and rx antennas

This patch adds infrastructure for supporting different
number of tx and rx antennas
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-4965-commands.h

@@ -269,11 +269,10 @@ struct iwl_cmd_header {
  *          10 B active, A inactive
  *          11 Both active
  */
-#define RATE_MCS_ANT_A_POS	14
-#define RATE_MCS_ANT_B_POS	15
-#define RATE_MCS_ANT_A_MSK	0x4000
-#define RATE_MCS_ANT_B_MSK	0x8000
-#define RATE_MCS_ANT_AB_MSK	0xc000
+#define RATE_MCS_ANT_POS       14
+#define RATE_MCS_ANT_A_MSK     0x04000
+#define RATE_MCS_ANT_B_MSK     0x08000
+#define RATE_MCS_ANT_AB_MSK    0x0C000
 
 
 /**

drivers/net/wireless/iwlwifi/iwl-4965.c

@@ -410,7 +410,7 @@ void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 	int rate_index;
 
 	control->antenna_sel_tx =
-		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_A_POS);
+		((rate_n_flags & RATE_MCS_ANT_AB_MSK) >> RATE_MCS_ANT_POS);
 	if (rate_n_flags & RATE_MCS_HT_MSK)
 		control->flags |= IEEE80211_TXCTL_OFDM_HT;
 	if (rate_n_flags & RATE_MCS_GF_MSK)
@@ -2040,7 +2040,10 @@ int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
 	priv->hw_params.max_stations = IWL4965_STATION_COUNT;
 	priv->hw_params.bcast_sta_id = IWL4965_BROADCAST_ID;
 
-	priv->hw_params.tx_ant_num = 2;
+	priv->hw_params.tx_chains_num = 2;
+	priv->hw_params.rx_chains_num = 2;
+	priv->hw_params.valid_tx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX);
+	priv->hw_params.valid_rx_ant = (IWL_ANTENNA_MAIN | IWL_ANTENNA_AUX);
 
 	return 0;
 }

drivers/net/wireless/iwlwifi/iwl-4965.h

@@ -580,11 +580,14 @@ struct iwl4965_ibss_seq {
 struct iwl_hw_params {
 	u16 max_txq_num;
 	u16 tx_cmd_len;
-	u16 tx_ant_num;
+	u8  tx_chains_num;
+	u8  rx_chains_num;
+	u8  valid_tx_ant;
+	u8  valid_rx_ant;
 	u16 max_rxq_size;
+	u16 max_rxq_log;
 	u32 rx_buf_size;
 	u32 max_pkt_size;
-	u16 max_rxq_log;
 	u8  max_stations;
 	u8  bcast_sta_id;
 };