net: ethernet: mtk-star-emac: add support for MII interface

Add support for MII interface.
If user wants to use MII, assign "MII" to "phy-mode" property in dts.

Signed-off-by: Biao Huang <biao.huang@mediatek.com>
Signed-off-by: Yinghua Pan <ot_yinghua.pan@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mediatek/mtk_star_emac.c b/drivers/net/ethernet/mediatek/mtk_star_emac.c
index 05ce622..a1165f2 100644 (file)
--- a/drivers/net/ethernet/mediatek/mtk_star_emac.c
+++ b/drivers/net/ethernet/mediatek/mtk_star_emac.c
@@ -192,6 +192,7 @@ static const char *const mtk_star_clk_names[] = { "core", "reg", "trans" };
 #define MTK_PERICFG_REG_NIC_CFG1_CON           0x03c8
 #define MTK_PERICFG_REG_NIC_CFG_CON_V2         0x0c10
 #define MTK_PERICFG_REG_NIC_CFG_CON_CFG_INTF   GENMASK(3, 0)
+#define MTK_PERICFG_BIT_NIC_CFG_CON_MII                0
 #define MTK_PERICFG_BIT_NIC_CFG_CON_RMII       1
 #define MTK_PERICFG_BIT_NIC_CFG_CON_CLK                BIT(0)
 #define MTK_PERICFG_BIT_NIC_CFG_CON_CLK_V2     BIT(8)
@@ -1462,6 +1463,7 @@ static int mtk_star_set_timing(struct mtk_star_priv *priv)
        unsigned int delay_val = 0;
 
        switch (priv->phy_intf) {
+       case PHY_INTERFACE_MODE_MII:
        case PHY_INTERFACE_MODE_RMII:
                delay_val |= FIELD_PREP(MTK_STAR_BIT_INV_RX_CLK, priv->rx_inv);
                delay_val |= FIELD_PREP(MTK_STAR_BIT_INV_TX_CLK, priv->tx_inv);
@@ -1543,7 +1545,8 @@ static int mtk_star_probe(struct platform_device *pdev)
        ret = of_get_phy_mode(of_node, &priv->phy_intf);
        if (ret) {
                return ret;
-       } else if (priv->phy_intf != PHY_INTERFACE_MODE_RMII) {
+       } else if (priv->phy_intf != PHY_INTERFACE_MODE_RMII &&
+                  priv->phy_intf != PHY_INTERFACE_MODE_MII) {
                dev_err(dev, "unsupported phy mode: %s\n",
                        phy_modes(priv->phy_intf));
                return -EINVAL;
@@ -1612,6 +1615,10 @@ static int mt8516_set_interface_mode(struct net_device *ndev)
        unsigned int intf_val, ret, rmii_rxc;
 
        switch (priv->phy_intf) {
+       case PHY_INTERFACE_MODE_MII:
+               intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_MII;
+               rmii_rxc = 0;
+               break;
        case PHY_INTERFACE_MODE_RMII:
                intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_RMII;
                rmii_rxc = priv->rmii_rxc ? 0 : MTK_PERICFG_BIT_NIC_CFG_CON_CLK;
@@ -1641,6 +1648,9 @@ static int mt8365_set_interface_mode(struct net_device *ndev)
        unsigned int intf_val;
 
        switch (priv->phy_intf) {
+       case PHY_INTERFACE_MODE_MII:
+               intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_MII;
+               break;
        case PHY_INTERFACE_MODE_RMII:
                intf_val = MTK_PERICFG_BIT_NIC_CFG_CON_RMII;
                intf_val |= priv->rmii_rxc ? 0 : MTK_PERICFG_BIT_NIC_CFG_CON_CLK_V2;