iwlwifi: add bt_init_traffic_load as configurable parameter

Adding configurable parameter in .cfg for the initial Bluetooth traffic
load; set it to IWL_BT_COEX_TRAFFIC_LOAD_NONE for now, but can be change
for debugging or other reason.
Signed-off-by: NWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-6000.c

@@ -832,6 +832,7 @@ struct iwl_cfg iwl6000g2b_2agn_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 struct iwl_cfg iwl6000g2b_2abg_cfg = {
@@ -871,6 +872,7 @@ struct iwl_cfg iwl6000g2b_2abg_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 struct iwl_cfg iwl6000g2b_2bgn_cfg = {
@@ -912,6 +914,7 @@ struct iwl_cfg iwl6000g2b_2bgn_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 struct iwl_cfg iwl6000g2b_2bg_cfg = {
@@ -951,6 +954,7 @@ struct iwl_cfg iwl6000g2b_2bg_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 struct iwl_cfg iwl6000g2b_bgn_cfg = {
@@ -992,6 +996,7 @@ struct iwl_cfg iwl6000g2b_bgn_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 struct iwl_cfg iwl6000g2b_bg_cfg = {
@@ -1031,6 +1036,7 @@ struct iwl_cfg iwl6000g2b_bg_cfg = {
 	/* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
 	.scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
 	.advanced_bt_coexist = true,
+	.bt_init_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_NONE,
 };
 
 /*

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

@@ -2805,7 +2805,7 @@ static void __iwl_down(struct iwl_priv *priv)
 	iwl_clear_driver_stations(priv);
 
 	/* reset BT coex data */
-	priv->bt_traffic_load = 0;
+	priv->bt_traffic_load = priv->cfg->bt_init_traffic_load;
 	priv->bt_sco_active = false;
 	priv->bt_full_concurrent = false;
 	priv->bt_ci_compliance = 0;

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

@@ -279,6 +279,7 @@ struct iwl_mod_params {
  *	chain noise calibration operation
  * @scan_antennas: available antenna for scan operation
  * @advanced_bt_coexist: support advanced bt coexist
+ * @bt_init_traffic_load: specify initial bt traffic load
  * @need_dc_calib: need to perform init dc calibration
  * @bt_statistics: use BT version of statistics notification
  * @agg_time_limit: maximum number of uSec in aggregation
@@ -353,6 +354,7 @@ struct iwl_cfg {
 	u8 scan_rx_antennas[IEEE80211_NUM_BANDS];
 	u8 scan_tx_antennas[IEEE80211_NUM_BANDS];
 	bool advanced_bt_coexist;
+	u8 bt_init_traffic_load;
 	const bool need_dc_calib;
 	const bool bt_statistics;
 	u16 agg_time_limit;