iwlwifi: add iwl_hw_detect function to iwl core

This patch add iwl_hw_detect function to iwl core
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -739,7 +739,6 @@ int iwl4965_hw_nic_init(struct iwl_priv *priv)
 {
 	unsigned long flags;
 	struct iwl4965_rx_queue *rxq = &priv->rxq;
-	u8 rev_id;
 	u8 val_link;
 	u32 val;
 	int ret;
@@ -751,18 +750,11 @@ int iwl4965_hw_nic_init(struct iwl_priv *priv)
 	iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	/* Determine HW type */
-	ret = pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &rev_id);
-	if (ret)
-		return ret;
-
-	IWL_DEBUG_INFO("HW Revision ID = 0x%X\n", rev_id);
-
 	ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 
 	spin_lock_irqsave(&priv->lock, flags);
 
-	if ((rev_id & 0x80) == 0x80 && (rev_id & 0x7f) < 8) {
+	if ((priv->rev_id & 0x80) == 0x80 && (priv->rev_id & 0x7f) < 8) {
 		pci_read_config_dword(priv->pci_dev, PCI_REG_WUM8, &val);
 		/* Enable No Snoop field */
 		pci_write_config_dword(priv->pci_dev, PCI_REG_WUM8,

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

@@ -1003,6 +1003,9 @@ struct iwl_priv {
 
 	/* pci hardware address support */
 	void __iomem *hw_base;
+	u32  hw_rev;
+	u32  hw_wa_rev;
+	u8   rev_id;
 
 	/* uCode images, save to reload in case of failure */
 	struct fw_desc ucode_code;	/* runtime inst */

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

@@ -36,6 +36,7 @@ struct iwl_priv; /* FIXME: remove */
 #include "iwl-eeprom.h"
 #include "iwl-4965.h" /* FIXME: remove */
 #include "iwl-core.h"
+#include "iwl-io.h"
 #include "iwl-rfkill.h"
 #include "iwl-power.h"
 
@@ -73,6 +74,14 @@ out:
 }
 EXPORT_SYMBOL(iwl_alloc_all);
 
+void iwl_hw_detect(struct iwl_priv *priv)
+{
+	priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
+	priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
+	pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
+}
+EXPORT_SYMBOL(iwl_hw_detect);
+
 /**
  * iwlcore_clear_stations_table - Clear the driver's station table
  *

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

@@ -159,6 +159,7 @@ struct iwl_cfg {
 
 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 		struct ieee80211_ops *hw_ops);
+void iwl_hw_detect(struct iwl_priv *priv);
 
 void iwlcore_clear_stations_table(struct iwl_priv *priv);
 void iwlcore_reset_qos(struct iwl_priv *priv);

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

@@ -194,6 +194,11 @@
 #define CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW          (0x08000000)
 
 
+/* HW REV */
+#define CSR_HW_REV_TYPE_MSK            (0x00000F0)
+#define CSR_HW_REV_TYPE_3945           (0x00000D0)
+#define CSR_HW_REV_TYPE_4965           (0x0000000)
+
 /* EEPROM REG */
 #define CSR_EEPROM_REG_READ_VALID_MSK	(0x00000001)
 #define CSR_EEPROM_REG_BIT_CMD		(0x00000002)

drivers/net/wireless/iwlwifi/iwl4965-base.c

@@ -7459,8 +7459,10 @@ static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
 		(unsigned long long) pci_resource_len(pdev, 0));
 	IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
 
+	iwl_hw_detect(priv);
 	printk(KERN_INFO DRV_NAME
-		": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
+		": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
+		priv->cfg->name, priv->hw_rev);
 
 	/* amp init */
 	err = priv->cfg->ops->lib->apm_ops.init(priv);