iwlwifi: additional items in sensitivity range table

Add more items to sensitivity range table to avoid using hardcoded values.
Initialize the table per device since unique per device information is
required to perform sensitivity calibration.

additional items in sensitivity range table:
   .barker_corr_th_min: Barker correlation threshold minimum
   .barker_corr_th_min_mrc: Barker correlation threshold minimum for MRC
   .nrg_th_cca: Energy threshold for Clear Channel Assessment

Barker codes are a technique used in WLAN encoding for transmission.
MRC is "Maximal Ratio Combining", a technique for optimally combining the
signals from 2 or more receivers to achieve a better signal.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

6 files changed, 30 insertions, 9 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index 782a36198f38..966858587e25 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -678,6 +678,10 @@ static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
 
         .nrg_th_cck = 100,
         .nrg_th_ofdm = 100,
+
+        .barker_corr_th_min = 190,
+        .barker_corr_th_min_mrc = 390,
+        .nrg_th_cca = 62,
 };
 
 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 33b38aa0d8c3..a9d1aa3ad57b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -329,6 +329,10 @@ static struct iwl_sensitivity_ranges iwl5000_sensitivity = {
         .auto_corr_max_cck_mrc = 400,
         .nrg_th_cck = 95,
         .nrg_th_ofdm = 95,
+
+        .barker_corr_th_min = 190,
+        .barker_corr_th_min_mrc = 390,
+        .nrg_th_cca = 62,
 };
 
 static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
@@ -351,6 +355,10 @@ static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
         .auto_corr_max_cck_mrc = 400,
         .nrg_th_cck = 95,
         .nrg_th_ofdm = 95,
+
+        .barker_corr_th_min = 190,
+        .barker_corr_th_min_mrc = 390,
+        .nrg_th_cca = 62,
 };
 
 const u8 *iwl5000_eeprom_query_addr(const struct iwl_priv *priv,
diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index 46af74b86a83..dda1dd6ed40a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -121,6 +121,10 @@ static struct iwl_sensitivity_ranges iwl6000_sensitivity = {
         .auto_corr_max_cck_mrc = 310,
         .nrg_th_cck = 97,
         .nrg_th_ofdm = 100,
+
+        .barker_corr_th_min = 190,
+        .barker_corr_th_min_mrc = 390,
+        .nrg_th_cca = 62,
 };
 
 static int iwl6000_hw_set_hw_params(struct iwl_priv *priv)
diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.c b/drivers/net/wireless/iwlwifi/iwl-calib.c
index 69a80d7c2e44..1f801eb9fbff 100644
--- a/drivers/net/wireless/iwlwifi/iwl-calib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-calib.c
@@ -447,11 +447,11 @@ static int iwl_sensitivity_write(struct iwl_priv *priv)
                                 cpu_to_le16((u16)data->nrg_th_ofdm);
 
         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_INDEX] =
-                                cpu_to_le16(190);
+                                cpu_to_le16(data->barker_corr_th_min);
         cmd.table[HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX] =
-                                cpu_to_le16(390);
+                                cpu_to_le16(data->barker_corr_th_min_mrc);
         cmd.table[HD_OFDM_ENERGY_TH_IN_INDEX] =
-                                cpu_to_le16(62);
+                                cpu_to_le16(data->nrg_th_cca);
 
         IWL_DEBUG_CALIB(priv, "ofdm: ac %u mrc %u x1 %u mrc_x1 %u thresh %u\n",
                         data->auto_corr_ofdm, data->auto_corr_ofdm_mrc,
@@ -524,6 +524,9 @@ void iwl_init_sensitivity(struct iwl_priv *priv)
         data->auto_corr_cck_mrc = ranges->auto_corr_min_cck_mrc;
         data->nrg_th_cck = ranges->nrg_th_cck;
         data->nrg_th_ofdm = ranges->nrg_th_ofdm;
+        data->barker_corr_th_min = ranges->barker_corr_th_min;
+        data->barker_corr_th_min_mrc = ranges->barker_corr_th_min_mrc;
+        data->nrg_th_cca = ranges->nrg_th_cca;
 
         data->last_bad_plcp_cnt_ofdm = 0;
         data->last_fa_cnt_ofdm = 0;
diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index ba3e4c837d87..2e8a55ed7de5 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -3247,12 +3247,6 @@ struct iwl_missed_beacon_notif {
  *   Lower values mean higher energy; this means making sure that the value
  *   in HD_MIN_ENERGY_CCK_DET_INDEX is at or *above* "Max cck energy".
  *
- * Driver should set the following entries to fixed values:
- *
- *   HD_MIN_ENERGY_OFDM_DET_INDEX               100
- *   HD_BARKER_CORR_TH_ADD_MIN_INDEX            190
- *   HD_BARKER_CORR_TH_ADD_MIN_MRC_INDEX        390
- *   HD_OFDM_ENERGY_TH_IN_INDEX                  62
  */
 
 /*
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 394402afaa57..c1b07e2045e6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -629,6 +629,10 @@ struct iwl_sensitivity_ranges {
         u16 auto_corr_max_cck_mrc;
         u16 auto_corr_min_cck;
         u16 auto_corr_min_cck_mrc;
+
+        u16 barker_corr_th_min;
+        u16 barker_corr_th_min_mrc;
+        u16 nrg_th_cca;
 };
 
 
@@ -850,6 +854,10 @@ struct iwl_sensitivity_data {
         s32 nrg_auto_corr_silence_diff;
         u32 num_in_cck_no_fa;
         u32 nrg_th_ofdm;
+
+        u16 barker_corr_th_min;
+        u16 barker_corr_th_min_mrc;
+        u16 nrg_th_cca;
 };
 
 /* Chain noise (differential Rx gain) calib data */