wifi: iwlwifi: pcie: Add reading and storing of crf and cdb id.

Read and store crf and cdb id details to make it
available during driver's lifetime
Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20221205102808.888b30780128.Ic8c4c088a75a0d7092d6301ef3760a118a06d819@changeid

drivers/net/wireless/intel/iwlwifi/iwl-trans.h

@@ -976,6 +976,8 @@ struct iwl_trans_txqs {
  * @max_skb_frags: maximum number of fragments an SKB can have when transmitted.
  *	0 indicates that frag SKBs (NETIF_F_SG) aren't supported.
  * @hw_rf_id a u32 with the device RF ID
+ * @hw_crf_id a u32 with the device CRF ID
+ * @hw_cdb_id a u32 with the device CDB ID
  * @hw_id: a u32 with the ID of the device / sub-device.
  *	Set during transport allocation.
  * @hw_id_str: a string with info about HW ID. Set during transport allocation.
@@ -1015,6 +1017,8 @@ struct iwl_trans {
 	u32 hw_rev;
 	u32 hw_rev_step;
 	u32 hw_rf_id;
+	u32 hw_crf_id;
+	u32 hw_cdb_id;
 	u32 hw_id;
 	char hw_id_str[52];
 	u32 sku_id[3];

drivers/net/wireless/intel/iwlwifi/pcie/drv.c

@@ -1350,15 +1350,13 @@ static const struct iwl_dev_info iwl_dev_info_table[] = {
 };
 
 /*
- * In case that there is no OTP on the NIC, get the rf id and cdb info
- * from the prph registers.
+ * Read rf id and cdb info from prph register and store it
  */
 static int get_crf_id(struct iwl_trans *iwl_trans)
 {
 	int ret = 0;
 	u32 sd_reg_ver_addr;
-	u32 cdb = 0;
-	u32 val;
+	u32 val = 0;
 
 	if (iwl_trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_AX210)
 		sd_reg_ver_addr = SD_REG_VER_GEN2;
@@ -1377,10 +1375,26 @@ static int get_crf_id(struct iwl_trans *iwl_trans)
 	iwl_write_umac_prph_no_grab(iwl_trans, WFPM_CTRL_REG, val);
 
 	/* Read crf info */
-	val = iwl_read_prph_no_grab(iwl_trans, sd_reg_ver_addr);
+	iwl_trans->hw_crf_id = iwl_read_prph_no_grab(iwl_trans, sd_reg_ver_addr);
 
 	/* Read cdb info (also contains the jacket info if needed in the future */
-	cdb = iwl_read_umac_prph_no_grab(iwl_trans, WFPM_OTP_CFG1_ADDR);
+	iwl_trans->hw_cdb_id = iwl_read_umac_prph_no_grab(iwl_trans, WFPM_OTP_CFG1_ADDR);
+
+	iwl_trans_release_nic_access(iwl_trans);
+
+out:
+	return ret;
+}
+
+/*
+ * In case that there is no OTP on the NIC, map the rf id and cdb info
+ * from the prph registers.
+ */
+static int map_crf_id(struct iwl_trans *iwl_trans)
+{
+	int ret = 0;
+	u32 val = iwl_trans->hw_crf_id;
+	u32 cdb = iwl_trans->hw_cdb_id;
 
 	/* Map between crf id to rf id */
 	switch (REG_CRF_ID_TYPE(val)) {
@@ -1410,7 +1424,7 @@ static int get_crf_id(struct iwl_trans *iwl_trans)
 		IWL_ERR(iwl_trans,
 			"Can find a correct rfid for crf id 0x%x\n",
 			REG_CRF_ID_TYPE(val));
-		goto out_release;
+		goto out;
 
 	}
 
@@ -1423,8 +1437,6 @@ static int get_crf_id(struct iwl_trans *iwl_trans)
 	IWL_INFO(iwl_trans, "Detected RF 0x%x from crf id 0x%x\n",
 		 iwl_trans->hw_rf_id, REG_CRF_ID_TYPE(val));
 
-out_release:
-	iwl_trans_release_nic_access(iwl_trans);
 
 out:
 	return ret;
@@ -1544,6 +1556,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	iwl_trans->hw_rf_id = iwl_read32(iwl_trans, CSR_HW_RF_ID);
+	get_crf_id(iwl_trans);
 
 	/*
 	 * The RF_ID is set to zero in blank OTP so read version to
@@ -1552,7 +1565,7 @@ static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	 */
 	if (iwl_trans->trans_cfg->rf_id &&
 	    iwl_trans->trans_cfg->device_family >= IWL_DEVICE_FAMILY_9000 &&
-	    !CSR_HW_RFID_TYPE(iwl_trans->hw_rf_id) && get_crf_id(iwl_trans)) {
+	    !CSR_HW_RFID_TYPE(iwl_trans->hw_rf_id) && map_crf_id(iwl_trans)) {
 		ret = -EINVAL;
 		goto out_free_trans;
 	}