r8169: add helpers for per-device hw_start handler

They aim to limit the amount of moved code when the hw_start
handler gets more specialized.

No functional change.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Edward Hsu <edward_hsu@realtek.com.tw>

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 5e24a0c..f549f09 100644 (file)
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1813,7 +1813,7 @@ static void rtl8169_hw_reset(void __iomem *ioaddr)
        RTL_R8(ChipCmd);
 }
 
-static void rtl8169_set_rx_tx_config_registers(struct rtl8169_private *tp)
+static void rtl_set_rx_tx_config_registers(struct rtl8169_private *tp)
 {
        void __iomem *ioaddr = tp->mmio_addr;
        u32 cfg = rtl8169_rx_config;
@@ -1851,6 +1851,35 @@ static void rtl_hw_start(struct net_device *dev)
 }
 
 
+static void rtl_set_rx_tx_desc_registers(struct rtl8169_private *tp,
+                                        void __iomem *ioaddr)
+{
+       /*
+        * Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
+        * register to be written before TxDescAddrLow to work.
+        * Switching from MMIO to I/O access fixes the issue as well.
+        */
+       RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr) >> 32);
+       RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr) & DMA_32BIT_MASK);
+       RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr) >> 32);
+       RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr) & DMA_32BIT_MASK);
+}
+
+static u16 rtl_rw_cpluscmd(void __iomem *ioaddr)
+{
+       u16 cmd;
+
+       cmd = RTL_R16(CPlusCmd);
+       RTL_W16(CPlusCmd, cmd);
+       return cmd;
+}
+
+static void rtl_set_rx_max_size(void __iomem *ioaddr)
+{
+       /* Low hurts. Let's disable the filtering. */
+       RTL_W16(RxMaxSize, 16383);
+}
+
 static void rtl_hw_start_8169(struct net_device *dev)
 {
        struct rtl8169_private *tp = netdev_priv(dev);
@@ -1890,19 +1919,15 @@ static void rtl_hw_start_8169(struct net_device *dev)
 
        RTL_W8(EarlyTxThres, EarlyTxThld);
 
-       /* Low hurts. Let's disable the filtering. */
-       RTL_W16(RxMaxSize, 16383);
+       rtl_set_rx_max_size(ioaddr);
 
        if ((tp->mac_version == RTL_GIGA_MAC_VER_01) ||
            (tp->mac_version == RTL_GIGA_MAC_VER_02) ||
            (tp->mac_version == RTL_GIGA_MAC_VER_03) ||
            (tp->mac_version == RTL_GIGA_MAC_VER_04))
-               rtl8169_set_rx_tx_config_registers(tp);
+               rtl_set_rx_tx_config_registers(tp);
 
-       cmd = RTL_R16(CPlusCmd);
-       RTL_W16(CPlusCmd, cmd);
-
-       tp->cp_cmd |= cmd | PCIMulRW;
+       tp->cp_cmd |= rtl_rw_cpluscmd(ioaddr) | PCIMulRW;
 
        if ((tp->mac_version == RTL_GIGA_MAC_VER_02) ||
            (tp->mac_version == RTL_GIGA_MAC_VER_03)) {
@@ -1919,22 +1944,14 @@ static void rtl_hw_start_8169(struct net_device *dev)
         */
        RTL_W16(IntrMitigate, 0x0000);
 
-       /*
-        * Magic spell: some iop3xx ARM board needs the TxDescAddrHigh
-        * register to be written before TxDescAddrLow to work.
-        * Switching from MMIO to I/O access fixes the issue as well.
-        */
-       RTL_W32(TxDescStartAddrHigh, ((u64) tp->TxPhyAddr >> 32));
-       RTL_W32(TxDescStartAddrLow, ((u64) tp->TxPhyAddr & DMA_32BIT_MASK));
-       RTL_W32(RxDescAddrHigh, ((u64) tp->RxPhyAddr >> 32));
-       RTL_W32(RxDescAddrLow, ((u64) tp->RxPhyAddr & DMA_32BIT_MASK));
+       rtl_set_rx_tx_desc_registers(tp, ioaddr);
 
        if ((tp->mac_version != RTL_GIGA_MAC_VER_01) &&
            (tp->mac_version != RTL_GIGA_MAC_VER_02) &&
            (tp->mac_version != RTL_GIGA_MAC_VER_03) &&
            (tp->mac_version != RTL_GIGA_MAC_VER_04)) {
                RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
-               rtl8169_set_rx_tx_config_registers(tp);
+               rtl_set_rx_tx_config_registers(tp);
        }
 
        RTL_W8(Cfg9346, Cfg9346_Lock);