ar8316: automatically detect whether port4 is used as PHY or as a switch port

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26778 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic/files/drivers/net/phy/ar8216.c b/target/linux/generic/files/drivers/net/phy/ar8216.c
index 2f48d7b..587f41f 100644 (file)
--- a/target/linux/generic/files/drivers/net/phy/ar8216.c
+++ b/target/linux/generic/files/drivers/net/phy/ar8216.c
@@ -44,6 +44,8 @@ struct ar8216_priv {
        struct net_device_ops ndo;
        struct mutex reg_mutex;
        int chip;
+       bool initialized;
+       bool port4_phy;
 
        /* all fields below are cleared on reset */
        bool vlan;
@@ -511,32 +513,24 @@ ar8216_hw_apply(struct switch_dev *dev)
 
 static int
 ar8316_hw_init(struct ar8216_priv *priv) {
-       static int initialized;
        int i;
-       u32 val;
+       u32 val, newval;
        struct mii_bus *bus;
 
-       if (initialized)
-               return 0;
-
        val = priv->read(priv, 0x8);
 
        if (priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
-               /* value taken from Ubiquiti RouterStation Pro */
-               if (val == 0x81461bea) {
-                       /* switch already intialized by bootloader */
-                       initialized = true;
-                       return 0;
+               if (priv->port4_phy) {
+                       /* value taken from Ubiquiti RouterStation Pro */
+                       newval = 0x81461bea;
+                       printk(KERN_INFO "ar8316: Using port 4 as PHY\n");
+               } else {
+                       newval = 0x01261be2;
+                       printk(KERN_INFO "ar8316: Using port 4 as switch port\n");
                }
-               priv->write(priv, 0x8, 0x81461bea);
        } else if (priv->phy->interface == PHY_INTERFACE_MODE_GMII) {
                /* value taken from AVM Fritz!Box 7390 sources */
-               if (val == 0x010e5b71) {
-                       /* switch already initialized by bootloader */
-                       initialized = true;
-                       return 0;
-               }
-               priv->write(priv, 0x8, 0x010e5b71);
+               newval = 0x010e5b71;
        } else {
                /* no known value for phy interface */
                printk(KERN_ERR "ar8316: unsupported mii mode: %d.\n",
@@ -544,14 +538,19 @@ ar8316_hw_init(struct ar8216_priv *priv) {
                return -EINVAL;
        }
 
+       if (val == newval)
+               goto out;
+
+       priv->write(priv, 0x8, newval);
+
        /* standard atheros magic */
        priv->write(priv, 0x38, 0xc000050e);
 
        /* Initialize the ports */
        bus = priv->phy->bus;
        for (i = 0; i < 5; i++) {
-               if ((i == 4) &&
-                       priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
+               if ((i == 4) && priv->port4_phy &&
+                   priv->phy->interface == PHY_INTERFACE_MODE_RGMII) {
                        /* work around for phy4 rgmii mode */
                        bus->write(bus, i, MII_ATH_DBG_ADDR, 0x12);
                        bus->write(bus, i, MII_ATH_DBG_DATA, 0x480c);
@@ -571,7 +570,9 @@ ar8316_hw_init(struct ar8216_priv *priv) {
                bus->write(bus, i, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
                msleep(1000);
        }
-       initialized = true;
+
+out:
+       priv->initialized = true;
        return 0;
 }
 
@@ -656,33 +657,58 @@ static const struct switch_dev_ops ar8216_ops = {
 static int
 ar8216_config_init(struct phy_device *pdev)
 {
-       struct ar8216_priv *priv;
+       struct ar8216_priv *priv = pdev->priv;
        struct net_device *dev = pdev->attached_dev;
        struct switch_dev *swdev;
        int ret;
 
-       priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
-       if (priv == NULL)
-               return -ENOMEM;
+       if (!priv) {
+               priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
+               if (priv == NULL)
+                       return -ENOMEM;
+       }
 
        priv->phy = pdev;
 
        priv->chip = ar8216_id_chip(priv);
 
-       if (pdev->addr == 0)
-               printk(KERN_INFO "%s: AR%d switch driver attached.\n",
-                       pdev->attached_dev->name, priv->chip);
-
-
        if (pdev->addr != 0) {
                if (priv->chip == AR8316) {
                        pdev->supported |= SUPPORTED_1000baseT_Full;
                        pdev->advertising |= ADVERTISED_1000baseT_Full;
+
+                       /* check if we're attaching to the switch twice */
+                       pdev = pdev->bus->phy_map[0];
+                       if (!pdev) {
+                               kfree(priv);
+                               return 0;
+                       }
+
+                       /* switch device has not been initialized, reuse priv */
+                       if (!pdev->priv) {
+                               priv->port4_phy = true;
+                               pdev->priv = priv;
+                               return 0;
+                       }
+
+                       kfree(priv);
+
+                       /* switch device has been initialized, reinit */
+                       priv = pdev->priv;
+                       priv->dev.ports = (AR8216_NUM_PORTS - 1);
+                       priv->initialized = false;
+                       priv->port4_phy = true;
+                       ar8316_hw_init(priv);
+                       return 0;
                }
+
                kfree(priv);
                return 0;
        }
 
+       printk(KERN_INFO "%s: AR%d switch driver attached.\n",
+               pdev->attached_dev->name, priv->chip);
+
        pdev->supported = priv->chip == AR8316 ?
                SUPPORTED_1000baseT_Full : SUPPORTED_100baseT_Full;
        pdev->advertising = pdev->supported;
@@ -696,16 +722,19 @@ ar8216_config_init(struct phy_device *pdev)
        swdev = &priv->dev;
        swdev->cpu_port = AR8216_PORT_CPU;
        swdev->ops = &ar8216_ops;
+       swdev->ports = AR8216_NUM_PORTS;
 
        if (priv->chip == AR8316) {
                swdev->name = "Atheros AR8316";
                swdev->vlans = AR8X16_MAX_VLANS;
-               /* port 5 connected to the other mac, therefore unusable */
-               swdev->ports = (AR8216_NUM_PORTS - 1);
+
+               if (priv->port4_phy) {
+                       /* port 5 connected to the other mac, therefore unusable */
+                       swdev->ports = (AR8216_NUM_PORTS - 1);
+               }
        } else {
                swdev->name = "Atheros AR8216";
                swdev->vlans = AR8216_NUM_VLANS;
-               swdev->ports = AR8216_NUM_PORTS;
        }
 
        if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {