iwlwifi: add possibility to disable tx_power calibration

This patch adds the possibility to disable the tx_power calibration.
In 5000 HW, this calibration is implemented in uCode, hence, it is
disabled in driver by default.

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

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

@@ -2103,7 +2103,8 @@ void iwl4965_hw_rx_statistics(struct iwl_priv *priv,
 	priv->temperature = temp;
 	set_bit(STATUS_TEMPERATURE, &priv->status);
 
-	if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
+	if (!priv->disable_tx_power_cal &&
+	     unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
 	     iwl4965_is_temp_calib_needed(priv))
 		queue_work(priv->workqueue, &priv->txpower_work);
 }

drivers/net/wireless/iwlwifi/iwl-5000.c

@@ -1229,6 +1229,12 @@ static u16 iwl5000_get_hcmd_size(u8 cmd_id, u16 len)
 	return len;
 }
 
+static void iwl5000_setup_deferred_work(struct iwl_priv *priv)
+{
+	/* in 5000 the tx power calibration is done in uCode */
+	priv->disable_tx_power_cal = 1;
+}
+
 static void iwl5000_rx_handler_setup(struct iwl_priv *priv)
 {
 	/* init calibration handlers */
@@ -1313,6 +1319,7 @@ static struct iwl_lib_ops iwl5000_lib = {
 	.txq_inval_byte_cnt_tbl = iwl5000_txq_inval_byte_cnt_tbl,
 	.txq_set_sched = iwl5000_txq_set_sched,
 	.rx_handler_setup = iwl5000_rx_handler_setup,
+	.setup_deferred_work = iwl5000_setup_deferred_work,
 	.is_valid_rtc_data_addr = iwl5000_hw_valid_rtc_data_addr,
 	.load_ucode = iwl5000_load_ucode,
 	.init_alive_start = iwl5000_init_alive_start,

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

@@ -57,6 +57,7 @@ struct iwl_debugfs {
 	struct dir_rf_files {
 		struct dentry *file_disable_sensitivity;
 		struct dentry *file_disable_chain_noise;
+		struct dentry *file_disable_tx_power;
 	} dbgfs_rf_files;
 	u32 sram_offset;
 	u32 sram_len;

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

@@ -388,6 +388,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
 	DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
 	DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
 			 &priv->disable_chain_noise_cal);
+	DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal);
 	return 0;
 
 err:
@@ -415,6 +416,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
 	DEBUGFS_REMOVE(priv->dbgfs->dir_data);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
 	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);
+	DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power);
 	DEBUGFS_REMOVE(priv->dbgfs->dir_rf);
 	DEBUGFS_REMOVE(priv->dbgfs->dir_drv);
 	kfree(priv->dbgfs);

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

@@ -1204,6 +1204,7 @@ struct iwl_priv {
 	struct work_struct txpower_work;
 	u32 disable_sens_cal;
 	u32 disable_chain_noise_cal;
+	u32 disable_tx_power_cal;
 	struct work_struct run_time_calib_work;
 	struct timer_list statistics_periodic;
 }; /*iwl_priv */