net/sh-eth: Add support selecting MII function for SH7734 and R8A7740

Ethernet IP of SH7734 and R8A7740 has selecting MII register.
The user needs to change a value according to MII to be used.
This adds the function to change the value of this register.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 66 insertions, 43 deletions

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 79bf09b4197..8d696e0c082 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -49,6 +49,34 @@
                 NETIF_MSG_RX_ERR| \
                 NETIF_MSG_TX_ERR)
 
+#if defined(CONFIG_CPU_SUBTYPE_SH7734) || \
+        defined(CONFIG_CPU_SUBTYPE_SH7763) || \
+        defined(CONFIG_ARCH_R8A7740)
+static void sh_eth_select_mii(struct net_device *ndev)
+{
+        u32 value = 0x0;
+        struct sh_eth_private *mdp = netdev_priv(ndev);
+
+        switch (mdp->phy_interface) {
+        case PHY_INTERFACE_MODE_GMII:
+                value = 0x2;
+                break;
+        case PHY_INTERFACE_MODE_MII:
+                value = 0x1;
+                break;
+        case PHY_INTERFACE_MODE_RMII:
+                value = 0x0;
+                break;
+        default:
+                pr_warn("PHY interface mode was not setup. Set to MII.\n");
+                value = 0x1;
+                break;
+        }
+
+        sh_eth_write(ndev, value, RMII_MII);
+}
+#endif
+
 /* There is CPU dependent code */
 #if defined(CONFIG_CPU_SUBTYPE_SH7724)
 #define SH_ETH_RESET_DEFAULT    1
@@ -283,6 +311,7 @@ static struct sh_eth_cpu_data *sh_eth_get_cpu_data(struct sh_eth_private *mdp)
 #elif defined(CONFIG_CPU_SUBTYPE_SH7734) || defined(CONFIG_CPU_SUBTYPE_SH7763)
 #define SH_ETH_HAS_TSU  1
 static void sh_eth_reset_hw_crc(struct net_device *ndev);
+
 static void sh_eth_chip_reset(struct net_device *ndev)
 {
         struct sh_eth_private *mdp = netdev_priv(ndev);
@@ -292,35 +321,6 @@ static void sh_eth_chip_reset(struct net_device *ndev)
         mdelay(1);
 }
 
-static void sh_eth_reset(struct net_device *ndev)
-{
-        int cnt = 100;
-
-        sh_eth_write(ndev, EDSR_ENALL, EDSR);
-        sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR);
-        while (cnt > 0) {
-                if (!(sh_eth_read(ndev, EDMR) & 0x3))
-                        break;
-                mdelay(1);
-                cnt--;
-        }
-        if (cnt == 0)
-                printk(KERN_ERR "Device reset fail\n");
-
-        /* Table Init */
-        sh_eth_write(ndev, 0x0, TDLAR);
-        sh_eth_write(ndev, 0x0, TDFAR);
-        sh_eth_write(ndev, 0x0, TDFXR);
-        sh_eth_write(ndev, 0x0, TDFFR);
-        sh_eth_write(ndev, 0x0, RDLAR);
-        sh_eth_write(ndev, 0x0, RDFAR);
-        sh_eth_write(ndev, 0x0, RDFXR);
-        sh_eth_write(ndev, 0x0, RDFFR);
-
-        /* Reset HW CRC register */
-        sh_eth_reset_hw_crc(ndev);
-}
-
 static void sh_eth_set_duplex(struct net_device *ndev)
 {
         struct sh_eth_private *mdp = netdev_priv(ndev);
@@ -377,9 +377,43 @@ static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
         .tsu            = 1,
 #if defined(CONFIG_CPU_SUBTYPE_SH7734)
         .hw_crc     = 1,
+        .select_mii = 1,
 #endif
 };
 
+static void sh_eth_reset(struct net_device *ndev)
+{
+        int cnt = 100;
+
+        sh_eth_write(ndev, EDSR_ENALL, EDSR);
+        sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR);
+        while (cnt > 0) {
+                if (!(sh_eth_read(ndev, EDMR) & 0x3))
+                        break;
+                mdelay(1);
+                cnt--;
+        }
+        if (cnt == 0)
+                printk(KERN_ERR "Device reset fail\n");
+
+        /* Table Init */
+        sh_eth_write(ndev, 0x0, TDLAR);
+        sh_eth_write(ndev, 0x0, TDFAR);
+        sh_eth_write(ndev, 0x0, TDFXR);
+        sh_eth_write(ndev, 0x0, TDFFR);
+        sh_eth_write(ndev, 0x0, RDLAR);
+        sh_eth_write(ndev, 0x0, RDFAR);
+        sh_eth_write(ndev, 0x0, RDFXR);
+        sh_eth_write(ndev, 0x0, RDFFR);
+
+        /* Reset HW CRC register */
+        sh_eth_reset_hw_crc(ndev);
+
+        /* Select MII mode */
+        if (sh_eth_my_cpu_data.select_mii)
+                sh_eth_select_mii(ndev);
+}
+
 static void sh_eth_reset_hw_crc(struct net_device *ndev)
 {
         if (sh_eth_my_cpu_data.hw_crc)
@@ -391,25 +425,12 @@ static void sh_eth_reset_hw_crc(struct net_device *ndev)
 static void sh_eth_chip_reset(struct net_device *ndev)
 {
         struct sh_eth_private *mdp = netdev_priv(ndev);
-        unsigned long mii;
 
         /* reset device */
         sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR);
         mdelay(1);
 
-        switch (mdp->phy_interface) {
-        case PHY_INTERFACE_MODE_GMII:
-                mii = 2;
-                break;
-        case PHY_INTERFACE_MODE_MII:
-                mii = 1;
-                break;
-        case PHY_INTERFACE_MODE_RMII:
-        default:
-                mii = 0;
-                break;
-        }
-        sh_eth_write(ndev, mii, RMII_MII);
+        sh_eth_select_mii(ndev);
 }
 
 static void sh_eth_reset(struct net_device *ndev)
@@ -492,6 +513,7 @@ static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
         .no_trimd       = 1,
         .no_ade         = 1,
         .tsu            = 1,
+        .select_mii     = 1,
 };
 
 #elif defined(CONFIG_CPU_SUBTYPE_SH7619)
diff --git a/drivers/net/ethernet/renesas/sh_eth.h b/drivers/net/ethernet/renesas/sh_eth.h
index 57b8e1fc5d1..d6763b1392d 100644
--- a/drivers/net/ethernet/renesas/sh_eth.h
+++ b/drivers/net/ethernet/renesas/sh_eth.h
@@ -757,6 +757,7 @@ struct sh_eth_cpu_data {
         unsigned no_trimd:1;            /* E-DMAC DO NOT have TRIMD */
         unsigned no_ade:1;      /* E-DMAC DO NOT have ADE bit in EESR */
         unsigned hw_crc:1;      /* E-DMAC have CSMR */
+        unsigned select_mii:1;  /* EtherC have RMII_MII (MII select register) */
 };
 
 struct sh_eth_private {