iwlwifi: add debugfs to disable/enable run time calibration

This patch adds functionality to debugfs to enable or disable chain
noise or sensitivity calibrations.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 44 insertions, 4 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.c b/drivers/net/wireless/iwlwifi/iwl-calib.c
index 1289d4c91abe..beb9716165c3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-calib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-calib.c
@@ -426,6 +426,9 @@ void iwl_init_sensitivity(struct iwl_priv *priv)
         struct iwl_sensitivity_data *data = NULL;
         const struct iwl_sensitivity_ranges *ranges = priv->hw_params.sens;
 
+        if (priv->disable_sens_cal)
+                return;
+
         IWL_DEBUG_CALIB("Start iwl_init_sensitivity\n");
 
         /* Clear driver's sensitivity algo data */
@@ -486,6 +489,9 @@ void iwl_sensitivity_calibration(struct iwl_priv *priv,
         unsigned long flags;
         struct statistics_general_data statis;
 
+        if (priv->disable_sens_cal)
+                return;
+
         data = &(priv->sensitivity_data);
 
         if (!iwl_is_associated(priv)) {
@@ -608,6 +614,9 @@ void iwl_chain_noise_calibration(struct iwl_priv *priv,
         unsigned long flags;
         struct statistics_rx_non_phy *rx_info = &(stat_resp->rx.general);
 
+        if (priv->disable_chain_noise_cal)
+                return;
+
         data = &(priv->chain_noise_data);
 
         /* Accumulate just the first 20 beacons after the first association,
diff --git a/drivers/net/wireless/iwlwifi/iwl-calib.h b/drivers/net/wireless/iwlwifi/iwl-calib.h
index 933b0b0a797b..e690668f08a1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-calib.h
+++ b/drivers/net/wireless/iwlwifi/iwl-calib.h
@@ -81,7 +81,9 @@ void iwl_init_sensitivity(struct iwl_priv *priv);
 
 static inline void iwl_chain_noise_reset(struct iwl_priv *priv)
 {
-        if (priv->cfg->ops->utils->chain_noise_reset)
+
+        if (!priv->disable_chain_noise_cal &&
+            priv->cfg->ops->utils->chain_noise_reset)
                 priv->cfg->ops->utils->chain_noise_reset(priv);
 }
 #else
diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index 2f24594c5fea..c3f8e90c5ba7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -45,13 +45,20 @@ struct iwl_debugfs {
         const char *name;
         struct dentry *dir_drv;
         struct dentry *dir_data;
-        struct dir_data_files{
+        struct dentry *dir_rf;
+        struct dir_data_files {
                 struct dentry *file_sram;
                 struct dentry *file_eeprom;
                 struct dentry *file_stations;
                 struct dentry *file_rx_statistics;
                 struct dentry *file_tx_statistics;
         } dbgfs_data_files;
+        struct dir_rf_files {
+#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
+                struct dentry *file_disable_sensitivity;
+                struct dentry *file_disable_chain_noise;
+#endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
+        } dbgfs_rf_files;
         u32 sram_offset;
         u32 sram_len;
 };
diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index ad25806dfaf1..f7ec2009cdf9 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -55,6 +55,13 @@
                 goto err;                                               \
 } while (0)
 
+#define DEBUGFS_ADD_BOOL(name, parent, ptr) do {                        \
+        dbgfs->dbgfs_##parent##_files.file_##name =                     \
+        debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr);     \
+        if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name))          \
+                goto err;                                               \
+} while (0)
+
 #define DEBUGFS_REMOVE(name)  do {              \
         debugfs_remove(name);                   \
         name = NULL;                            \
@@ -344,12 +351,17 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         }
 
         DEBUGFS_ADD_DIR(data, dbgfs->dir_drv);
+        DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv);
         DEBUGFS_ADD_FILE(eeprom, data);
         DEBUGFS_ADD_FILE(sram, data);
         DEBUGFS_ADD_FILE(stations, data);
         DEBUGFS_ADD_FILE(rx_statistics, data);
         DEBUGFS_ADD_FILE(tx_statistics, data);
-
+#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
+        DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
+        DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
+                         &priv->disable_chain_noise_cal);
+#endif  /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
         return 0;
 
 err:
@@ -374,6 +386,11 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
+#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
+#endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
+        DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
         DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
         kfree(priv->dbgfs);
         priv->dbgfs = NULL;
@@ -381,3 +398,4 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
 EXPORT_SYMBOL(iwl_dbgfs_unregister);
 
 
+
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index b1ff0afd8286..820542bac443 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1212,9 +1212,13 @@ struct iwl_priv {
 #endif /* CONFIG_IWLWIFI_DEBUG */
 
         struct work_struct txpower_work;
+#ifdef CONFIG_IWLWIFI_RUN_TIME_CALIB
+        u32 disable_sens_cal;
+        u32 disable_chain_noise_cal;
+#endif /* CONFIG_IWLWIFI_RUN_TIME_CALIB */
 #ifdef CONFIG_IWL4965_RUN_TIME_CALIB
         struct work_struct sensitivity_work;
-#endif
+#endif /* CONFIG_IWL4965_RUN_TIME_CALIB */
         struct timer_list statistics_periodic;
 }; /*iwl_priv */