iwlwifi: refactor the code that reads the MAC address from the NVM

It makes it slightly easier to follow. Pass the pointer to
the transport which allows to read WFMP_MAC_ADDR_X register
only when needed and to use IWL_ERR instead of the less
commonly used IWL_ERR_DEV logger macro.
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c

@@ -7,6 +7,7 @@
  *
  * Copyright(c) 2008 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
+ * Copyright(c) 2016 Intel Deutschland GmbH
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of version 2 of the GNU General Public License as
@@ -69,6 +70,7 @@
 #include "iwl-drv.h"
 #include "iwl-modparams.h"
 #include "iwl-nvm-parse.h"
+#include "iwl-prph.h"
 
 /* NVM offsets (in words) definitions */
 enum wkp_nvm_offsets {
@@ -522,27 +524,11 @@ static void iwl_set_radio_cfg(const struct iwl_cfg *cfg,
 	data->valid_rx_ant = NVM_RF_CFG_RX_ANT_MSK_FAMILY_8000(radio_cfg);
 }
 
-static void iwl_set_hw_address(const struct iwl_cfg *cfg,
-			       struct iwl_nvm_data *data,
-			       const __le16 *nvm_sec)
-{
-	const u8 *hw_addr = (const u8 *)(nvm_sec + HW_ADDR);
-
-	/* The byte order is little endian 16 bit, meaning 214365 */
-	data->hw_addr[0] = hw_addr[1];
-	data->hw_addr[1] = hw_addr[0];
-	data->hw_addr[2] = hw_addr[3];
-	data->hw_addr[3] = hw_addr[2];
-	data->hw_addr[4] = hw_addr[5];
-	data->hw_addr[5] = hw_addr[4];
-}
-
-static void iwl_set_hw_address_family_8000(struct device *dev,
+static void iwl_set_hw_address_family_8000(struct iwl_trans *trans,
 					   const struct iwl_cfg *cfg,
 					   struct iwl_nvm_data *data,
 					   const __le16 *mac_override,
-					   const __le16 *nvm_hw,
-					   __le32 mac_addr0, __le32 mac_addr1)
+					   const __le16 *nvm_hw)
 {
 	const u8 *hw_addr;
 
@@ -568,11 +554,16 @@ static void iwl_set_hw_address_family_8000(struct device *dev,
 		    memcmp(reserved_mac, hw_addr, ETH_ALEN) != 0)
 			return;
 
-		IWL_ERR_DEV(dev,
-			    "mac address from nvm override section is not valid\n");
+		IWL_ERR(trans,
+			"mac address from nvm override section is not valid\n");
 	}
 
 	if (nvm_hw) {
+		/* read the mac address from WFMP registers */
+		__le32 mac_addr0 = cpu_to_le32(iwl_trans_read_prph(trans,
+						WFMP_MAC_ADDR_0));
+		__le32 mac_addr1 = cpu_to_le32(iwl_trans_read_prph(trans,
+						WFMP_MAC_ADDR_1));
 		/* read the MAC address from HW resisters */
 		hw_addr = (const u8 *)&mac_addr0;
 		data->hw_addr[0] = hw_addr[3];
@@ -585,28 +576,50 @@ static void iwl_set_hw_address_family_8000(struct device *dev,
 		data->hw_addr[5] = hw_addr[0];
 
 		if (!is_valid_ether_addr(data->hw_addr))
-			IWL_ERR_DEV(dev,
-				    "mac address (%pM) from hw section is not valid\n",
-				    data->hw_addr);
+			IWL_ERR(trans,
+				"mac address (%pM) from hw section is not valid\n",
+				data->hw_addr);
 
 		return;
 	}
 
-	IWL_ERR_DEV(dev, "mac address is not found\n");
+	IWL_ERR(trans, "mac address is not found\n");
+}
+
+static void iwl_set_hw_address(struct iwl_trans *trans,
+			       const struct iwl_cfg *cfg,
+			       struct iwl_nvm_data *data, const __le16 *nvm_hw,
+			       const __le16 *mac_override)
+{
+	if (cfg->device_family != IWL_DEVICE_FAMILY_8000) {
+		const u8 *hw_addr = (const u8 *)(nvm_hw + HW_ADDR);
+
+		/* The byte order is little endian 16 bit, meaning 214365 */
+		data->hw_addr[0] = hw_addr[1];
+		data->hw_addr[1] = hw_addr[0];
+		data->hw_addr[2] = hw_addr[3];
+		data->hw_addr[3] = hw_addr[2];
+		data->hw_addr[4] = hw_addr[5];
+		data->hw_addr[5] = hw_addr[4];
+	} else {
+		iwl_set_hw_address_family_8000(trans, cfg, data,
+					       mac_override, nvm_hw);
+	}
 }
 
 struct iwl_nvm_data *
-iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
+iwl_parse_nvm_data(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 		   const __le16 *nvm_hw, const __le16 *nvm_sw,
 		   const __le16 *nvm_calib, const __le16 *regulatory,
 		   const __le16 *mac_override, const __le16 *phy_sku,
-		   u8 tx_chains, u8 rx_chains, bool lar_fw_supported,
-		   __le32 mac_addr0, __le32 mac_addr1)
+		   u8 tx_chains, u8 rx_chains, bool lar_fw_supported)
 {
+	struct device *dev = trans->dev;
 	struct iwl_nvm_data *data;
-	u32 sku;
-	u32 radio_cfg;
+	bool lar_enabled;
+	u32 sku, radio_cfg;
 	u16 lar_config;
+	const __le16 *ch_section;
 
 	if (cfg->device_family != IWL_DEVICE_FAMILY_8000)
 		data = kzalloc(sizeof(*data) +
@@ -645,21 +658,16 @@ iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
 	if (cfg->device_family != IWL_DEVICE_FAMILY_8000) {
 		/* Checking for required sections */
 		if (!nvm_calib) {
-			IWL_ERR_DEV(dev,
-				    "Can't parse empty Calib NVM sections\n");
+			IWL_ERR(trans,
+				"Can't parse empty Calib NVM sections\n");
 			kfree(data);
 			return NULL;
 		}
 		/* in family 8000 Xtal calibration values moved to OTP */
 		data->xtal_calib[0] = *(nvm_calib + XTAL_CALIB);
 		data->xtal_calib[1] = *(nvm_calib + XTAL_CALIB + 1);
-	}
-
-	if (cfg->device_family != IWL_DEVICE_FAMILY_8000) {
-		iwl_set_hw_address(cfg, data, nvm_hw);
-
-		iwl_init_sbands(dev, cfg, data, nvm_sw,
-				tx_chains, rx_chains, lar_fw_supported);
+		lar_enabled = true;
+		ch_section = nvm_sw;
 	} else {
 		u16 lar_offset = data->nvm_version < 0xE39 ?
 				 NVM_LAR_OFFSET_FAMILY_8000_OLD :
@@ -668,16 +676,13 @@ iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
 		lar_config = le16_to_cpup(regulatory + lar_offset);
 		data->lar_enabled = !!(lar_config &
 				       NVM_LAR_ENABLED_FAMILY_8000);
-
-		/* MAC address in family 8000 */
-		iwl_set_hw_address_family_8000(dev, cfg, data, mac_override,
-					       nvm_hw, mac_addr0, mac_addr1);
-
-		iwl_init_sbands(dev, cfg, data, regulatory,
-				tx_chains, rx_chains,
-				lar_fw_supported && data->lar_enabled);
+		lar_enabled = data->lar_enabled;
+		ch_section = regulatory;
 	}
 
+	iwl_set_hw_address(trans, cfg, data, nvm_hw, mac_override);
+	iwl_init_sbands(dev, cfg, data, ch_section, tx_chains, rx_chains,
+			lar_fw_supported && lar_enabled);
 	data->calib_version = 255;
 
 	return data;

drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.h

@@ -74,12 +74,11 @@
  * later with iwl_free_nvm_data().
  */
 struct iwl_nvm_data *
-iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
+iwl_parse_nvm_data(struct iwl_trans *trans, const struct iwl_cfg *cfg,
 		   const __le16 *nvm_hw, const __le16 *nvm_sw,
 		   const __le16 *nvm_calib, const __le16 *regulatory,
 		   const __le16 *mac_override, const __le16 *phy_sku,
-		   u8 tx_chains, u8 rx_chains, bool lar_fw_supported,
-		   __le32 mac_addr0, __le32 mac_addr1);
+		   u8 tx_chains, u8 rx_chains, bool lar_fw_supported);
 
 /**
  * iwl_parse_mcc_info - parse MCC (mobile country code) info coming from FW

drivers/net/wireless/intel/iwlwifi/mvm/nvm.c

@@ -300,7 +300,6 @@ iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 	struct iwl_nvm_section *sections = mvm->nvm_sections;
 	const __le16 *hw, *sw, *calib, *regulatory, *mac_override, *phy_sku;
 	bool lar_enabled;
-	__le32 mac_addr0, mac_addr1;
 
 	/* Checking for required sections */
 	if (mvm->trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
@@ -336,12 +335,6 @@ iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 	if (WARN_ON(!mvm->cfg))
 		return NULL;
 
-	/* read the mac address from WFMP registers */
-	mac_addr0 = cpu_to_le32(iwl_trans_read_prph(mvm->trans,
-						    WFMP_MAC_ADDR_0));
-	mac_addr1 = cpu_to_le32(iwl_trans_read_prph(mvm->trans,
-						    WFMP_MAC_ADDR_1));
-
 	hw = (const __le16 *)sections[mvm->cfg->nvm_hw_section_num].data;
 	sw = (const __le16 *)sections[NVM_SECTION_TYPE_SW].data;
 	calib = (const __le16 *)sections[NVM_SECTION_TYPE_CALIBRATION].data;
@@ -354,10 +347,10 @@ iwl_parse_nvm_sections(struct iwl_mvm *mvm)
 		      fw_has_capa(&mvm->fw->ucode_capa,
 				  IWL_UCODE_TLV_CAPA_LAR_SUPPORT);
 
-	return iwl_parse_nvm_data(mvm->trans->dev, mvm->cfg, hw, sw, calib,
+	return iwl_parse_nvm_data(mvm->trans, mvm->cfg, hw, sw, calib,
 				  regulatory, mac_override, phy_sku,
 				  mvm->fw->valid_tx_ant, mvm->fw->valid_rx_ant,
-				  lar_enabled, mac_addr0, mac_addr1);
+				  lar_enabled);
 }
 
 #define MAX_NVM_FILE_LEN	16384