mv643xx_eth: add PHY-less mode

On some boards, the mv643xx_eth MAC isn't connected to a PHY but
directly (via the MII/GMII/RGMII interface) to another MAC-layer
device.  This patch allows specifying ->phy_addr = -1 to skip all
PHY-related initialisation and run-time poking in that case.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>

1 files changed, 74 insertions, 13 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 481a2c4ff0cd..a2b958ddf5f0 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -1110,6 +1110,22 @@ static int mv643xx_eth_get_settings(struct net_device *dev, struct ethtool_cmd *
         return err;
 }
 
+static int mv643xx_eth_get_settings_phyless(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        cmd->supported = SUPPORTED_MII;
+        cmd->advertising = ADVERTISED_MII;
+        cmd->speed = SPEED_1000;
+        cmd->duplex = DUPLEX_FULL;
+        cmd->port = PORT_MII;
+        cmd->phy_address = 0;
+        cmd->transceiver = XCVR_INTERNAL;
+        cmd->autoneg = AUTONEG_DISABLE;
+        cmd->maxtxpkt = 1;
+        cmd->maxrxpkt = 1;
+
+        return 0;
+}
+
 static int mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
         struct mv643xx_eth_private *mp = netdev_priv(dev);
@@ -1127,6 +1143,11 @@ static int mv643xx_eth_set_settings(struct net_device *dev, struct ethtool_cmd *
         return err;
 }
 
+static int mv643xx_eth_set_settings_phyless(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+        return -EINVAL;
+}
+
 static void mv643xx_eth_get_drvinfo(struct net_device *dev,
                                     struct ethtool_drvinfo *drvinfo)
 {
@@ -1144,6 +1165,11 @@ static int mv643xx_eth_nway_reset(struct net_device *dev)
         return mii_nway_restart(&mp->mii);
 }
 
+static int mv643xx_eth_nway_reset_phyless(struct net_device *dev)
+{
+        return -EINVAL;
+}
+
 static u32 mv643xx_eth_get_link(struct net_device *dev)
 {
         struct mv643xx_eth_private *mp = netdev_priv(dev);
@@ -1151,6 +1177,11 @@ static u32 mv643xx_eth_get_link(struct net_device *dev)
         return mii_link_ok(&mp->mii);
 }
 
+static u32 mv643xx_eth_get_link_phyless(struct net_device *dev)
+{
+        return 1;
+}
+
 static void mv643xx_eth_get_strings(struct net_device *dev,
                                     uint32_t stringset, uint8_t *data)
 {
@@ -1210,6 +1241,18 @@ static const struct ethtool_ops mv643xx_eth_ethtool_ops = {
         .get_sset_count         = mv643xx_eth_get_sset_count,
 };
 
+static const struct ethtool_ops mv643xx_eth_ethtool_ops_phyless = {
+        .get_settings           = mv643xx_eth_get_settings_phyless,
+        .set_settings           = mv643xx_eth_set_settings_phyless,
+        .get_drvinfo            = mv643xx_eth_get_drvinfo,
+        .nway_reset             = mv643xx_eth_nway_reset_phyless,
+        .get_link               = mv643xx_eth_get_link_phyless,
+        .set_sg                 = ethtool_op_set_sg,
+        .get_strings            = mv643xx_eth_get_strings,
+        .get_ethtool_stats      = mv643xx_eth_get_ethtool_stats,
+        .get_sset_count         = mv643xx_eth_get_sset_count,
+};
+
 
 /* address handling *********************************************************/
 static void uc_addr_get(struct mv643xx_eth_private *mp, unsigned char *addr)
@@ -1656,12 +1699,16 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
         }
 
         if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK)) {
-                if (mii_link_ok(&mp->mii)) {
-                        struct ethtool_cmd cmd;
+                if (mp->phy_addr == -1 || mii_link_ok(&mp->mii)) {
                         int i;
 
-                        mii_ethtool_gset(&mp->mii, &cmd);
-                        update_pscr(mp, cmd.speed, cmd.duplex);
+                        if (mp->phy_addr != -1) {
+                                struct ethtool_cmd cmd;
+
+                                mii_ethtool_gset(&mp->mii, &cmd);
+                                update_pscr(mp, cmd.speed, cmd.duplex);
+                        }
+
                         for (i = 0; i < 8; i++)
                                 if (mp->txq_mask & (1 << i))
                                         txq_enable(mp->txq + i);
@@ -1751,7 +1798,6 @@ static void phy_reset(struct mv643xx_eth_private *mp)
 static void port_start(struct mv643xx_eth_private *mp)
 {
         u32 pscr;
-        struct ethtool_cmd ethtool_cmd;
         int i;
 
         /*
@@ -1771,9 +1817,16 @@ static void port_start(struct mv643xx_eth_private *mp)
 
         wrl(mp, SDMA_CONFIG(mp->port_num), PORT_SDMA_CONFIG_DEFAULT_VALUE);
 
-        mv643xx_eth_get_settings(mp->dev, &ethtool_cmd);
-        phy_reset(mp);
-        mv643xx_eth_set_settings(mp->dev, &ethtool_cmd);
+        /*
+         * Perform PHY reset, if there is a PHY.
+         */
+        if (mp->phy_addr != -1) {
+                struct ethtool_cmd cmd;
+
+                mv643xx_eth_get_settings(mp->dev, &cmd);
+                phy_reset(mp);
+                mv643xx_eth_set_settings(mp->dev, &cmd);
+        }
 
         /*
          * Configure TX path and queues.
@@ -1990,7 +2043,10 @@ static int mv643xx_eth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
         struct mv643xx_eth_private *mp = netdev_priv(dev);
 
-        return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
+        if (mp->phy_addr != -1)
+                return generic_mii_ioctl(&mp->mii, if_mii(ifr), cmd, NULL);
+
+        return -EOPNOTSUPP;
 }
 
 static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu)
@@ -2387,10 +2443,15 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
         mib_counters_clear(mp);
         INIT_WORK(&mp->tx_timeout_task, tx_timeout_task);
 
-        err = phy_init(mp, pd);
-        if (err)
-                goto out;
-        SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
+        if (mp->phy_addr != -1) {
+                err = phy_init(mp, pd);
+                if (err)
+                        goto out;
+
+                SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops);
+        } else {
+                SET_ETHTOOL_OPS(dev, &mv643xx_eth_ethtool_ops_phyless);
+        }
 
 
         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);