r8169: 8168DP specific MII registers access methods.

Adapted from version 8.019.00 of Realtek's r8168 driver and
amended per Hayes Wang's correction :
- OCPDR_GPHY_REG_SHIFT must be 16, not 12
- the reg should be at bit 16 ~ 22, whence OCPDR_REG_MASK

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 81 insertions, 2 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index b5ced5ebb60e..3a63363e47cc 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -277,6 +277,20 @@ enum rtl8168_8101_registers {
 #define EFUSEAR_DATA_MASK               0xff
 };
 
+enum rtl8168_registers {
+        EPHY_RXER_NUM           = 0x7c,
+        OCPDR                   = 0xb0, /* OCP GPHY access */
+#define OCPDR_WRITE_CMD                 0x80000000
+#define OCPDR_READ_CMD                  0x00000000
+#define OCPDR_REG_MASK                  0x7f
+#define OCPDR_GPHY_REG_SHIFT            16
+#define OCPDR_DATA_MASK                 0xffff
+        OCPAR                   = 0xb4,
+#define OCPAR_FLAG                      0x80000000
+#define OCPAR_GPHY_WRITE_CMD            0x8000f060
+#define OCPAR_GPHY_READ_CMD             0x0000f060
+};
+
 enum rtl_register_content {
         /* InterruptStatusBits */
         SYSErr          = 0x8000,
@@ -500,6 +514,12 @@ struct rtl8169_private {
 #ifdef CONFIG_R8169_VLAN
         struct vlan_group *vlgrp;
 #endif
+
+        struct mdio_ops {
+                void (*write)(void __iomem *, int, int);
+                int (*read)(void __iomem *, int);
+        } mdio_ops;
+
         int (*set_speed)(struct net_device *, u8 autoneg, u16 speed, u8 duplex);
         int (*get_settings)(struct net_device *, struct ethtool_cmd *);
         void (*phy_reset_enable)(struct rtl8169_private *tp);
@@ -595,14 +615,55 @@ static int r8169_mdio_read(void __iomem *ioaddr, int reg_addr)
         return value;
 }
 
+static void r8168dp_1_mdio_access(void __iomem *ioaddr, int reg_addr, u32 data)
+{
+        int i;
+
+        RTL_W32(OCPDR, data |
+                ((reg_addr & OCPDR_REG_MASK) << OCPDR_GPHY_REG_SHIFT));
+        RTL_W32(OCPAR, OCPAR_GPHY_WRITE_CMD);
+        RTL_W32(EPHY_RXER_NUM, 0);
+
+        for (i = 0; i < 100; i++) {
+                mdelay(1);
+                if (!(RTL_R32(OCPAR) & OCPAR_FLAG))
+                        break;
+        }
+}
+
+static void r8168dp_1_mdio_write(void __iomem *ioaddr, int reg_addr, int value)
+{
+        r8168dp_1_mdio_access(ioaddr, reg_addr, OCPDR_WRITE_CMD |
+                (value & OCPDR_DATA_MASK));
+}
+
+static int r8168dp_1_mdio_read(void __iomem *ioaddr, int reg_addr)
+{
+        int i;
+
+        r8168dp_1_mdio_access(ioaddr, reg_addr, OCPDR_READ_CMD);
+
+        mdelay(1);
+        RTL_W32(OCPAR, OCPAR_GPHY_READ_CMD);
+        RTL_W32(EPHY_RXER_NUM, 0);
+
+        for (i = 0; i < 100; i++) {
+                mdelay(1);
+                if (RTL_R32(OCPAR) & OCPAR_FLAG)
+                        break;
+        }
+
+        return RTL_R32(OCPDR) & OCPDR_DATA_MASK;
+}
+
 static void rtl_writephy(struct rtl8169_private *tp, int location, u32 val)
 {
-        r8169_mdio_write(tp->mmio_addr, location, val);
+        tp->mdio_ops.write(tp->mmio_addr, location, val);
 }
 
 static int rtl_readphy(struct rtl8169_private *tp, int location)
 {
-        return r8169_mdio_read(tp->mmio_addr, location);
+        return tp->mdio_ops.read(tp->mmio_addr, location);
 }
 
 static void rtl_patchphy(struct rtl8169_private *tp, int reg_addr, int value)
@@ -2474,6 +2535,22 @@ static const struct net_device_ops rtl8169_netdev_ops = {
 
 };
 
+static void __devinit rtl_init_mdio_ops(struct rtl8169_private *tp)
+{
+        struct mdio_ops *ops = &tp->mdio_ops;
+
+        switch (tp->mac_version) {
+        case RTL_GIGA_MAC_VER_27:
+                ops->write      = r8168dp_1_mdio_write;
+                ops->read       = r8168dp_1_mdio_read;
+                break;
+        default:
+                ops->write      = r8169_mdio_write;
+                ops->read       = r8169_mdio_read;
+                break;
+        }
+}
+
 static int __devinit
 rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
@@ -2592,6 +2669,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         /* Identify chip attached to board */
         rtl8169_get_mac_version(tp, ioaddr);
 
+        rtl_init_mdio_ops(tp);
+
         /* Use appropriate default if unknown */
         if (tp->mac_version == RTL_GIGA_MAC_NONE) {
                 netif_notice(tp, probe, dev,