iwlwifi: iwl_poll_{direct_}bit cleanup

The patch merges implementation of iwl_poll_bit() and
iwl_poll_direct_bit() by letting the latter be a special case of
the former.

Signed-off-by: Zhu Yi <yi.zhu@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-3945-hw.h

@@ -321,6 +321,7 @@ struct iwl3945_eeprom {
 /* RSSR */
 #define FH_RSSR_CTRL            (FH_RSSR_TABLE+0x000)
 #define FH_RSSR_STATUS          (FH_RSSR_TABLE+0x004)
+#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE	(0x01000000)
 /* TCSR */
 #define FH_TCSR(_channel)           (FH_TCSR_TABLE+(_channel)*0x20)
 #define FH_TCSR_CONFIG(_channel)    (FH_TCSR(_channel)+0x00)

drivers/net/wireless/iwlwifi/iwl-3945-io.h

@@ -271,16 +271,7 @@ static inline void iwl3945_write_reg_buf(struct iwl3945_priv *priv,
 static inline int _iwl3945_poll_direct_bit(struct iwl3945_priv *priv,
 					   u32 addr, u32 mask, int timeout)
 {
-	int i = 0;
-
-	do {
-		if ((_iwl3945_read_direct32(priv, addr) & mask) == mask)
-			return i;
-		udelay(10);
-		i += 10;
-	} while (i < timeout);
-
-	return -ETIMEDOUT;
+	return _iwl3945_poll_bit(priv, addr, mask, mask, timeout);
 }
 
 #ifdef CONFIG_IWL3945_DEBUG

drivers/net/wireless/iwlwifi/iwl-3945.c

@@ -1103,9 +1103,8 @@ int iwl3945_hw_nic_init(struct iwl3945_priv *priv)
 		    CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
 
 	iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
-	rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	rc = iwl3945_poll_direct_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (rc < 0) {
 		spin_unlock_irqrestore(&priv->lock, flags);
 		IWL_DEBUG_INFO("Failed to init the card\n");
@@ -1286,8 +1285,7 @@ int iwl3945_hw_nic_stop_master(struct iwl3945_priv *priv)
 		IWL_DEBUG_INFO("Card in power save, master is already "
 			       "stopped\n");
 	else {
-		rc = iwl3945_poll_bit(priv, CSR_RESET,
-				  CSR_RESET_REG_FLAG_MASTER_DISABLED,
+		rc = iwl3945_poll_direct_bit(priv, CSR_RESET,
 				  CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 		if (rc < 0) {
 			spin_unlock_irqrestore(&priv->lock, flags);
@@ -1312,9 +1310,8 @@ int iwl3945_hw_nic_reset(struct iwl3945_priv *priv)
 
 	iwl3945_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
 
-	rc = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	iwl3945_poll_direct_bit(priv, CSR_GP_CNTRL,
+			 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 
 	rc = iwl3945_grab_nic_access(priv);
 	if (!rc) {
@@ -2311,7 +2308,8 @@ int iwl3945_hw_rxq_stop(struct iwl3945_priv *priv)
 	}
 
 	iwl3945_write_direct32(priv, FH_RCSR_CONFIG(0), 0);
-	rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS, (1 << 24), 1000);
+	rc = iwl3945_poll_direct_bit(priv, FH_RSSR_STATUS,
+			FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
 	if (rc < 0)
 		IWL_ERROR("Can't stop Rx DMA.\n");
 

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

@@ -352,9 +352,8 @@ static int iwl4965_apm_init(struct iwl_priv *priv)
 	iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 
 	/* wait for clock stabilization */
-	ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			   CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (ret < 0) {
 		IWL_DEBUG_INFO("Failed to init the card\n");
 		goto out;
@@ -436,9 +435,8 @@ static int iwl4965_apm_stop_master(struct iwl_priv *priv)
 	/* set stop master bit */
 	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 
-	ret = iwl_poll_bit(priv, CSR_RESET,
-				  CSR_RESET_REG_FLAG_MASTER_DISABLED,
-				  CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
+	ret = iwl_poll_direct_bit(priv, CSR_RESET,
+			CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 	if (ret < 0)
 		goto out;
 
@@ -482,10 +480,8 @@ static int iwl4965_apm_reset(struct iwl_priv *priv)
 
 	iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 
-	ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
-
+	ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (ret < 0)
 		goto out;
 

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

@@ -81,8 +81,7 @@ static int iwl5000_apm_stop_master(struct iwl_priv *priv)
 	/* set stop master bit */
 	iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
 
-	ret = iwl_poll_bit(priv, CSR_RESET,
-				  CSR_RESET_REG_FLAG_MASTER_DISABLED,
+	ret = iwl_poll_direct_bit(priv, CSR_RESET,
 				  CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
 	if (ret < 0)
 		goto out;
@@ -120,9 +119,8 @@ static int iwl5000_apm_init(struct iwl_priv *priv)
 	iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 
 	/* wait for clock stabilization */
-	ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (ret < 0) {
 		IWL_DEBUG_INFO("Failed to init the card\n");
 		return ret;
@@ -189,9 +187,8 @@ static int iwl5000_apm_reset(struct iwl_priv *priv)
 	iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
 
 	/* wait for clock stabilization */
-	ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			  CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	ret = iwl_poll_direct_bit(priv, CSR_GP_CNTRL,
+			CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (ret < 0) {
 		IWL_DEBUG_INFO("Failed to init the card\n");
 		goto out;

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

@@ -169,10 +169,9 @@ int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
 			    CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
 
 		/* See if we got it */
-		ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
-				   CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
-				   CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
-				   EEPROM_SEM_TIMEOUT);
+		ret = iwl_poll_direct_bit(priv, CSR_HW_IF_CONFIG_REG,
+				CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
+				EEPROM_SEM_TIMEOUT);
 		if (ret >= 0) {
 			IWL_DEBUG_IO("Acquired semaphore after %d tries.\n",
 				count+1);

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

@@ -269,19 +269,10 @@ static inline void iwl_write_reg_buf(struct iwl_priv *priv,
 	}
 }
 
-static inline int _iwl_poll_direct_bit(struct iwl_priv *priv,
-					   u32 addr, u32 mask, int timeout)
+static inline int _iwl_poll_direct_bit(struct iwl_priv *priv, u32 addr,
+				       u32 mask, int timeout)
 {
-	int i = 0;
-
-	do {
-		if ((_iwl_read_direct32(priv, addr) & mask) == mask)
-			return i;
-		udelay(10);
-		i += 10;
-	} while (i < timeout);
-
-	return -ETIMEDOUT;
+	return _iwl_poll_bit(priv, addr, mask, mask, timeout);
 }
 
 #ifdef CONFIG_IWLWIFI_DEBUG

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

@@ -467,10 +467,8 @@ int iwl_rxq_stop(struct iwl_priv *priv)
 
 	/* stop Rx DMA */
 	iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0);
-	ret = iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
-				     (1 << 24), 1000);
-	if (ret < 0)
-		IWL_ERROR("Can't stop Rx DMA.\n");
+	iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG,
+			    FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000);
 
 	iwl_release_nic_access(priv);
 	spin_unlock_irqrestore(&priv->lock, flags);

drivers/net/wireless/iwlwifi/iwl3945-base.c

@@ -7925,9 +7925,8 @@ static int iwl3945_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
 			CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
 
 	iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
-	err = iwl3945_poll_bit(priv, CSR_GP_CNTRL,
-			       CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
-			       CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
+	err = iwl3945_poll_direct_bit(priv, CSR_GP_CNTRL,
+				CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
 	if (err < 0) {
 		IWL_DEBUG_INFO("Failed to init the card\n");
 		goto out_remove_sysfs;