iwlagn: rx antenna diversity

For the new 1x1 devices, hw and uCode will support rx
antenna diversity, but we need to indicate 1x1 device to
AccessPoint to make sure it won't use MIMO.

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

3 files changed, 16 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-1000.c b/drivers/net/wireless/iwlwifi/iwl-1000.c
index 3c983e426f2..94521d4417a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-1000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-1000.c
@@ -147,7 +147,11 @@ static int iwl1000_hw_set_hw_params(struct iwl_priv *priv)
         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 
         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
-        priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
+        if (priv->cfg->rx_with_siso_diversity)
+                priv->hw_params.rx_chains_num = 1;
+        else
+                priv->hw_params.rx_chains_num =
+                        num_of_ant(priv->cfg->valid_rx_ant);
         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 
@@ -311,6 +315,7 @@ struct iwl_cfg iwl100_bgn_cfg = {
         .base_params = &iwl1000_base_params,
         .ht_params = &iwl1000_ht_params,
         .led_mode = IWL_LED_RF_STATE,
+        .rx_with_siso_diversity = true,
 };
 
 struct iwl_cfg iwl100_bg_cfg = {
@@ -324,6 +329,7 @@ struct iwl_cfg iwl100_bg_cfg = {
         .mod_params = &iwlagn_mod_params,
         .base_params = &iwl1000_base_params,
         .led_mode = IWL_LED_RF_STATE,
+        .rx_with_siso_diversity = true,
 };
 
 MODULE_FIRMWARE(IWL1000_MODULE_FIRMWARE(IWL1000_UCODE_API_MAX));
diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index 10a536969eb..8a789241704 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -182,7 +182,11 @@ static int iwl6000_hw_set_hw_params(struct iwl_priv *priv)
         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
 
         priv->hw_params.tx_chains_num = num_of_ant(priv->cfg->valid_tx_ant);
-        priv->hw_params.rx_chains_num = num_of_ant(priv->cfg->valid_rx_ant);
+        if (priv->cfg->rx_with_siso_diversity)
+                priv->hw_params.rx_chains_num = 1;
+        else
+                priv->hw_params.rx_chains_num =
+                        num_of_ant(priv->cfg->valid_rx_ant);
         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
 
@@ -841,6 +845,7 @@ struct iwl_cfg iwl130_bgn_cfg = {
         .adv_pm = true,
         /* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
         .scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
+        .rx_with_siso_diversity = true,
 };
 
 struct iwl_cfg iwl130_bg_cfg = {
@@ -859,6 +864,7 @@ struct iwl_cfg iwl130_bg_cfg = {
         .adv_pm = true,
         /* Due to bluetooth, we transmit 2.4 GHz probes only on antenna A */
         .scan_tx_antennas[IEEE80211_BAND_2GHZ] = ANT_A,
+        .rx_with_siso_diversity = true,
 };
 
 MODULE_FIRMWARE(IWL6000_MODULE_FIRMWARE(IWL6000_UCODE_API_MAX));
diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h
index 568920ac982..d0b86f5e28c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-core.h
+++ b/drivers/net/wireless/iwlwifi/iwl-core.h
@@ -364,6 +364,7 @@ struct iwl_ht_params {
  * @scan_antennas: available antenna for scan operation
  * @led_mode: 0=blinking, 1=On(RF On)/Off(RF Off)
  * @adv_pm: advance power management
+ * @rx_with_siso_diversity: 1x1 device with rx antenna diversity
  *
  * We enable the driver to be backward compatible wrt API version. The
  * driver specifies which APIs it supports (with @ucode_api_max being the
@@ -412,6 +413,7 @@ struct iwl_cfg {
         u8 scan_tx_antennas[IEEE80211_NUM_BANDS];
         enum iwl_led_mode led_mode;
         const bool adv_pm;
+        const bool rx_with_siso_diversity;
 };
 
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