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>

9 files changed, 30 insertions, 60 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h b/drivers/net/wireless/iwlwifi/iwl-3945-hw.h
index 644bd9e08052..f0f7dc7ae7c6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h
+++ b/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)
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-io.h b/drivers/net/wireless/iwlwifi/iwl-3945-io.h
index 2f749432e4bc..994f8bab0dab 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-io.h
+++ b/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
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 4e9e592b1cab..1c35fa857be6 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/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");
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index c961e2c716d3..324825e810ff 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/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;
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 438e4bd0a9a8..1b82742ea333 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/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;
diff --git a/drivers/net/wireless/iwlwifi/iwl-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-eeprom.c
index 792a3c15f172..ae04327ec9ee 100644
--- a/drivers/net/wireless/iwlwifi/iwl-eeprom.c
+++ b/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);
diff --git a/drivers/net/wireless/iwlwifi/iwl-io.h b/drivers/net/wireless/iwlwifi/iwl-io.h
index a5c489af937a..c56dc215fef7 100644
--- a/drivers/net/wireless/iwlwifi/iwl-io.h
+++ b/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
diff --git a/drivers/net/wireless/iwlwifi/iwl-rx.c b/drivers/net/wireless/iwlwifi/iwl-rx.c
index 6dd16c7b5d93..1938e6d5026a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-rx.c
+++ b/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);
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 1a411c2d83e6..f7fa68bf8314 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/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;