generic: ar8216: add support for separated mdio bus for phy access
[openwrt/openwrt.git] / target / linux / generic / files / drivers / net / phy / ar8216.c
index 70f47746a468e2bc15d40dbecc8cd61289b700f6..e1c3dc95c30eb0ece265775a18c5222760ee79f4 100644 (file)
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
 #include <linux/netlink.h>
+#include <linux/of_device.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
 #include <linux/bitops.h>
 #include <net/genetlink.h>
 #include <linux/switch.h>
 #include <linux/delay.h>
 #include <linux/phy.h>
-#include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/lockdep.h>
 #include <linux/ar8216_platform.h>
@@ -177,7 +179,7 @@ ar8xxx_phy_check_aneg(struct phy_device *phydev)
        if (ret & BMCR_ANENABLE)
                return 0;
 
-       dev_info(&phydev->dev, "ANEG disabled, re-enabling ...\n");
+       dev_info(&phydev->mdio.dev, "ANEG disabled, re-enabling ...\n");
        ret |= BMCR_ANENABLE | BMCR_ANRESTART;
        return phy_write(phydev, MII_BMCR, ret);
 }
@@ -188,7 +190,7 @@ ar8xxx_phy_init(struct ar8xxx_priv *priv)
        int i;
        struct mii_bus *bus;
 
-       bus = priv->mii_bus;
+       bus = priv->sw_mii_bus ?: priv->mii_bus;
        for (i = 0; i < AR8XXX_NUM_PHYS; i++) {
                if (priv->chip->phy_fixup)
                        priv->chip->phy_fixup(priv, i);
@@ -295,6 +297,17 @@ ar8xxx_rmw(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
 
        return ret;
 }
+void
+ar8xxx_phy_dbg_read(struct ar8xxx_priv *priv, int phy_addr,
+           u16 dbg_addr, u16 *dbg_data)
+{
+       struct mii_bus *bus = priv->mii_bus;
+
+       mutex_lock(&bus->mdio_lock);
+       bus->write(bus, phy_addr, MII_ATH_DBG_ADDR, dbg_addr);
+       *dbg_data = bus->read(bus, phy_addr, MII_ATH_DBG_DATA);
+       mutex_unlock(&bus->mdio_lock);
+}
 
 void
 ar8xxx_phy_dbg_write(struct ar8xxx_priv *priv, int phy_addr,
@@ -355,6 +368,7 @@ ar8xxx_reg_wait(struct ar8xxx_priv *priv, u32 reg, u32 mask, u32 val,
                        return 0;
 
                usleep_range(1000, 2000);
+               cond_resched();
        }
 
        return -ETIMEDOUT;
@@ -426,6 +440,7 @@ ar8xxx_mib_fetch_port_stat(struct ar8xxx_priv *priv, int port, bool flush)
                        mib_stats[i] = 0;
                else
                        mib_stats[i] += t;
+               cond_resched();
        }
 }
 
@@ -536,7 +551,7 @@ ar8216_mangle_rx(struct net_device *dev, struct sk_buff *skb)
        if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
                return;
 
-       port = buf[0] & 0xf;
+       port = buf[0] & 0x7;
 
        /* no need to fix up packets coming from a tagged source */
        if (priv->vlan_tagged & (1 << port))
@@ -565,6 +580,7 @@ ar8216_wait_bit(struct ar8xxx_priv *priv, int reg, u32 mask, u32 val)
                        break;
 
                udelay(10);
+               cond_resched();
        }
 
        pr_err("ar8216: timeout on reg %08x: %08x & %08x != %08x\n",
@@ -700,7 +716,8 @@ ar8216_init_globals(struct ar8xxx_priv *priv)
 }
 
 static void
-ar8216_init_port(struct ar8xxx_priv *priv, int port)
+__ar8216_init_port(struct ar8xxx_priv *priv, int port,
+                  bool cpu_ge, bool flow_en)
 {
        /* Enable port learning and tx */
        ar8xxx_write(priv, AR8216_REG_PORT_CTRL(port),
@@ -712,12 +729,11 @@ ar8216_init_port(struct ar8xxx_priv *priv, int port)
        if (port == AR8216_PORT_CPU) {
                ar8xxx_write(priv, AR8216_REG_PORT_STATUS(port),
                        AR8216_PORT_STATUS_LINK_UP |
-                       (ar8xxx_has_gige(priv) ?
-                                AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
+                       (cpu_ge ? AR8216_PORT_SPEED_1000M : AR8216_PORT_SPEED_100M) |
                        AR8216_PORT_STATUS_TXMAC |
                        AR8216_PORT_STATUS_RXMAC |
-                       (chip_is_ar8316(priv) ? AR8216_PORT_STATUS_RXFLOW : 0) |
-                       (chip_is_ar8316(priv) ? AR8216_PORT_STATUS_TXFLOW : 0) |
+                       (flow_en ? AR8216_PORT_STATUS_RXFLOW : 0) |
+                       (flow_en ? AR8216_PORT_STATUS_TXFLOW : 0) |
                        AR8216_PORT_STATUS_DUPLEX);
        } else {
                ar8xxx_write(priv, AR8216_REG_PORT_STATUS(port),
@@ -725,13 +741,22 @@ ar8216_init_port(struct ar8xxx_priv *priv, int port)
        }
 }
 
+static void
+ar8216_init_port(struct ar8xxx_priv *priv, int port)
+{
+       __ar8216_init_port(priv, port, ar8xxx_has_gige(priv),
+                          chip_is_ar8316(priv));
+}
+
 static void
 ar8216_wait_atu_ready(struct ar8xxx_priv *priv, u16 r2, u16 r1)
 {
        int timeout = 20;
 
-       while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout)
-                udelay(10);
+       while (ar8xxx_mii_read32(priv, r2, r1) & AR8216_ATU_ACTIVE && --timeout) {
+               udelay(10);
+               cond_resched();
+       }
 
        if (!timeout)
                pr_err("ar8216: timeout waiting for atu to become ready\n");
@@ -744,7 +769,6 @@ static void ar8216_get_arl_entry(struct ar8xxx_priv *priv,
        u16 r2, page;
        u16 r1_func0, r1_func1, r1_func2;
        u32 t, val0, val1, val2;
-       int i;
 
        split_addr(AR8216_REG_ATU_FUNC0, &r1_func0, &r2, &page);
        r2 |= 0x10;
@@ -780,12 +804,7 @@ static void ar8216_get_arl_entry(struct ar8xxx_priv *priv,
                if (!*status)
                        break;
 
-               i = 0;
-               t = AR8216_ATU_PORT0;
-               while (!(val2 & t) && ++i < priv->dev.ports)
-                       t <<= 1;
-
-               a->port = i;
+               a->portmap = (val2 & AR8216_ATU_PORTS) >> AR8216_ATU_PORTS_S;
                a->mac[0] = (val0 & AR8216_ATU_ADDR5) >> AR8216_ATU_ADDR5_S;
                a->mac[1] = (val0 & AR8216_ATU_ADDR4) >> AR8216_ATU_ADDR4_S;
                a->mac[2] = (val1 & AR8216_ATU_ADDR3) >> AR8216_ATU_ADDR3_S;
@@ -796,6 +815,85 @@ static void ar8216_get_arl_entry(struct ar8xxx_priv *priv,
        }
 }
 
+static int
+ar8229_hw_init(struct ar8xxx_priv *priv)
+{
+       int phy_if_mode;
+
+       if (priv->initialized)
+               return 0;
+
+       ar8xxx_write(priv, AR8216_REG_CTRL, AR8216_CTRL_RESET);
+       ar8xxx_reg_wait(priv, AR8216_REG_CTRL, AR8216_CTRL_RESET, 0, 1000);
+
+       phy_if_mode = of_get_phy_mode(priv->pdev->of_node);
+
+       if (phy_if_mode == PHY_INTERFACE_MODE_GMII) {
+               ar8xxx_write(priv, AR8229_REG_OPER_MODE0,
+                                AR8229_OPER_MODE0_MAC_GMII_EN);
+       } else if (phy_if_mode == PHY_INTERFACE_MODE_MII) {
+               ar8xxx_write(priv, AR8229_REG_OPER_MODE0,
+                                AR8229_OPER_MODE0_PHY_MII_EN);
+       } else {
+               pr_err("ar8229: unsupported mii mode\n");
+               return -EINVAL;
+       }
+
+       if (priv->port4_phy)
+               ar8xxx_write(priv, AR8229_REG_OPER_MODE1,
+                            AR8229_REG_OPER_MODE1_PHY4_MII_EN);
+
+       ar8xxx_phy_init(priv);
+
+       priv->initialized = true;
+       return 0;
+}
+
+static void
+ar8229_init_globals(struct ar8xxx_priv *priv)
+{
+
+       /* Enable CPU port, and disable mirror port */
+       ar8xxx_write(priv, AR8216_REG_GLOBAL_CPUPORT,
+                    AR8216_GLOBAL_CPUPORT_EN |
+                    (15 << AR8216_GLOBAL_CPUPORT_MIRROR_PORT_S));
+
+       /* Setup TAG priority mapping */
+       ar8xxx_write(priv, AR8216_REG_TAG_PRIORITY, 0xfa50);
+
+       /* Enable aging, MAC replacing */
+       ar8xxx_write(priv, AR8216_REG_ATU_CTRL,
+                    0x2b /* 5 min age time */ |
+                    AR8216_ATU_CTRL_AGE_EN |
+                    AR8216_ATU_CTRL_LEARN_CHANGE);
+
+       /* Enable ARP frame acknowledge */
+       ar8xxx_reg_set(priv, AR8229_REG_QM_CTRL,
+                      AR8229_QM_CTRL_ARP_EN);
+
+       /* Enable Broadcast/Multicast frames transmitted to the CPU */
+       ar8xxx_reg_set(priv, AR8216_REG_FLOOD_MASK,
+                      AR8229_FLOOD_MASK_BC_DP(0) |
+                      AR8229_FLOOD_MASK_MC_DP(0));
+
+       /* setup MTU */
+       ar8xxx_rmw(priv, AR8216_REG_GLOBAL_CTRL,
+                  AR8236_GCTRL_MTU, AR8236_GCTRL_MTU);
+
+       /* Enable MIB counters */
+       ar8xxx_reg_set(priv, AR8216_REG_MIB_FUNC,
+                      AR8236_MIB_EN);
+
+       /* setup Service TAG */
+       ar8xxx_rmw(priv, AR8216_REG_SERVICE_TAG, AR8216_SERVICE_TAG_M, 0);
+}
+
+static void
+ar8229_init_port(struct ar8xxx_priv *priv, int port)
+{
+       __ar8216_init_port(priv, port, true, true);
+}
+
 static void
 ar8236_setup_port(struct ar8xxx_priv *priv, int port, u32 members)
 {
@@ -949,7 +1047,8 @@ ar8xxx_sw_set_pvid(struct switch_dev *dev, int port, int vlan)
 
        /* make sure no invalid PVIDs get set */
 
-       if (vlan >= dev->vlans)
+       if (vlan < 0 || vlan >= dev->vlans ||
+           port < 0 || port >= AR8X16_MAX_PORTS)
                return -EINVAL;
 
        priv->pvid[port] = vlan;
@@ -960,6 +1059,10 @@ int
 ar8xxx_sw_get_pvid(struct switch_dev *dev, int port, int *vlan)
 {
        struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+
+       if (port < 0 || port >= AR8X16_MAX_PORTS)
+               return -EINVAL;
+
        *vlan = priv->pvid[port];
        return 0;
 }
@@ -969,6 +1072,10 @@ ar8xxx_sw_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
                  struct switch_val *val)
 {
        struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
+
+       if (val->port_vlan >= AR8X16_MAX_VLANS)
+               return -EINVAL;
+
        priv->vlan_id[val->port_vlan] = val->value.i;
        return 0;
 }
@@ -996,9 +1103,13 @@ static int
 ar8xxx_sw_get_ports(struct switch_dev *dev, struct switch_val *val)
 {
        struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
-       u8 ports = priv->vlan_table[val->port_vlan];
+       u8 ports;
        int i;
 
+       if (val->port_vlan >= AR8X16_MAX_VLANS)
+               return -EINVAL;
+
+       ports = priv->vlan_table[val->port_vlan];
        val->len = 0;
        for (i = 0; i < dev->ports; i++) {
                struct switch_port *p;
@@ -1181,6 +1292,7 @@ ar8xxx_sw_reset_switch(struct switch_dev *dev)
        priv->arl_age_time = AR8XXX_DEFAULT_ARL_AGE_TIME;
 
        chip->init_globals(priv);
+       chip->atu_flush(priv);
 
        mutex_unlock(&priv->reg_mutex);
 
@@ -1378,7 +1490,7 @@ ar8xxx_sw_get_port_mib(struct switch_dev *dev,
        struct ar8xxx_priv *priv = swdev_to_ar8xxx(dev);
        const struct ar8xxx_chip *chip = priv->chip;
        u64 *mib_stats, mib_data;
-       int port;
+       unsigned int port;
        int ret;
        char *buf = priv->buf;
        char buf1[64];
@@ -1497,8 +1609,12 @@ ar8xxx_sw_get_arl_table(struct switch_dev *dev,
                 */
                for (j = 0; j < i; ++j) {
                        a1 = &priv->arl_table[j];
-                       if (a->port == a1->port && !memcmp(a->mac, a1->mac, sizeof(a->mac)))
-                               goto duplicate;
+                       if (!memcmp(a->mac, a1->mac, sizeof(a->mac))) {
+                               /* ignore ports already seen in former entry */
+                               a->portmap &= ~a1->portmap;
+                               if (!a->portmap)
+                                       goto duplicate;
+                       }
                }
        }
 
@@ -1515,7 +1631,7 @@ ar8xxx_sw_get_arl_table(struct switch_dev *dev,
        for (j = 0; j < priv->dev.ports; ++j) {
                for (k = 0; k < i; ++k) {
                        a = &priv->arl_table[k];
-                       if (a->port != j)
+                       if (!(a->portmap & BIT(j)))
                                continue;
                        len += snprintf(buf + len, sizeof(priv->arl_buf) - len,
                                        "Port %d: MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
@@ -1567,6 +1683,21 @@ ar8xxx_sw_set_flush_port_arl_table(struct switch_dev *dev,
        return ret;
 }
 
+static int
+ar8xxx_phy_read(struct mii_bus *bus, int phy_addr, int reg_addr)
+{
+       struct ar8xxx_priv *priv = bus->priv;
+       return priv->chip->phy_read(priv, phy_addr, reg_addr);
+}
+
+static int
+ar8xxx_phy_write(struct mii_bus *bus, int phy_addr, int reg_addr,
+                u16 reg_val)
+{
+       struct ar8xxx_priv *priv = bus->priv;
+       return priv->chip->phy_write(priv, phy_addr, reg_addr, reg_val);
+}
+
 static const struct switch_attr ar8xxx_sw_attr_globals[] = {
        {
                .type = SWITCH_TYPE_INT,
@@ -1682,6 +1813,16 @@ static const struct switch_dev_ops ar8xxx_sw_ops = {
        .apply_config = ar8xxx_sw_hw_apply,
        .reset_switch = ar8xxx_sw_reset_switch,
        .get_port_link = ar8xxx_sw_get_port_link,
+/* The following op is disabled as it hogs the CPU and degrades performance.
+   An implementation has been attempted in 4d8a66d but reading MIB data is slow
+   on ar8xxx switches.
+
+   The high CPU load has been traced down to the ar8xxx_reg_wait() call in
+   ar8xxx_mib_op(), which has to usleep_range() till the MIB busy flag set by
+   the request to update the MIB counter is cleared. */
+#if 0
+       .get_port_stats = ar8xxx_sw_get_port_stats,
+#endif
 };
 
 static const struct ar8xxx_chip ar8216_chip = {
@@ -1714,6 +1855,36 @@ static const struct ar8xxx_chip ar8216_chip = {
        .mib_func = AR8216_REG_MIB_FUNC
 };
 
+static const struct ar8xxx_chip ar8229_chip = {
+       .caps = AR8XXX_CAP_MIB_COUNTERS,
+
+       .reg_port_stats_start = 0x20000,
+       .reg_port_stats_length = 0x100,
+       .reg_arl_ctrl = AR8216_REG_ATU_CTRL,
+
+       .name = "Atheros AR8229",
+       .ports = AR8216_NUM_PORTS,
+       .vlans = AR8216_NUM_VLANS,
+       .swops = &ar8xxx_sw_ops,
+
+       .hw_init = ar8229_hw_init,
+       .init_globals = ar8229_init_globals,
+       .init_port = ar8229_init_port,
+       .setup_port = ar8236_setup_port,
+       .read_port_status = ar8216_read_port_status,
+       .atu_flush = ar8216_atu_flush,
+       .atu_flush_port = ar8216_atu_flush_port,
+       .vtu_flush = ar8216_vtu_flush,
+       .vtu_load_vlan = ar8216_vtu_load_vlan,
+       .set_mirror_regs = ar8216_set_mirror_regs,
+       .get_arl_entry = ar8216_get_arl_entry,
+       .sw_hw_apply = ar8xxx_sw_hw_apply,
+
+       .num_mibs = ARRAY_SIZE(ar8236_mibs),
+       .mib_decs = ar8236_mibs,
+       .mib_func = AR8216_REG_MIB_FUNC
+};
+
 static const struct ar8xxx_chip ar8236_chip = {
        .caps = AR8XXX_CAP_MIB_COUNTERS,
 
@@ -1775,7 +1946,7 @@ static const struct ar8xxx_chip ar8316_chip = {
 };
 
 static int
-ar8xxx_id_chip(struct ar8xxx_priv *priv)
+ar8xxx_read_id(struct ar8xxx_priv *priv)
 {
        u32 val;
        u16 id;
@@ -1800,6 +1971,17 @@ ar8xxx_id_chip(struct ar8xxx_priv *priv)
 
        priv->chip_ver = (id & AR8216_CTRL_VERSION) >> AR8216_CTRL_VERSION_S;
        priv->chip_rev = (id & AR8216_CTRL_REVISION);
+       return 0;
+}
+
+static int
+ar8xxx_id_chip(struct ar8xxx_priv *priv)
+{
+       int ret;
+
+       ret = ar8xxx_read_id(priv);
+       if(ret)
+               return ret;
 
        switch (priv->chip_ver) {
        case AR8XXX_VER_AR8216:
@@ -1889,7 +2071,7 @@ ar8xxx_mib_stop(struct ar8xxx_priv *priv)
        if (!ar8xxx_has_mib_counters(priv))
                return;
 
-       cancel_delayed_work(&priv->mib_work);
+       cancel_delayed_work_sync(&priv->mib_work);
 }
 
 static struct ar8xxx_priv *
@@ -1926,10 +2108,6 @@ ar8xxx_probe_switch(struct ar8xxx_priv *priv)
        struct switch_dev *swdev;
        int ret;
 
-       ret = ar8xxx_id_chip(priv);
-       if (ret)
-               return ret;
-
        chip = priv->chip;
 
        swdev = &priv->dev;
@@ -1983,7 +2161,7 @@ ar8xxx_phy_config_init(struct phy_device *phydev)
 
        priv->phy = phydev;
 
-       if (phydev->addr != 0) {
+       if (phydev->mdio.addr != 0) {
                if (chip_is_ar8316(priv)) {
                        /* switch device has been initialized, reinit */
                        priv->dev.ports = (AR8216_NUM_PORTS - 1);
@@ -2031,7 +2209,7 @@ ar8xxx_check_link_states(struct ar8xxx_priv *priv)
                /* flush ARL entries for this port if it went down*/
                if (!link_new)
                        priv->chip->atu_flush_port(priv, i);
-               dev_info(&priv->phy->dev, "Port %d is %s\n",
+               dev_info(&priv->phy->mdio.dev, "Port %d is %s\n",
                         i, link_new ? "up" : "down");
        }
 
@@ -2050,10 +2228,10 @@ ar8xxx_phy_read_status(struct phy_device *phydev)
        if (phydev->state == PHY_CHANGELINK)
                ar8xxx_check_link_states(priv);
 
-       if (phydev->addr != 0)
+       if (phydev->mdio.addr != 0)
                return genphy_read_status(phydev);
 
-       ar8216_read_port_link(priv, phydev->addr, &link);
+       ar8216_read_port_link(priv, phydev->mdio.addr, &link);
        phydev->link = !!link.link;
        if (!phydev->link)
                return 0;
@@ -2075,7 +2253,8 @@ ar8xxx_phy_read_status(struct phy_device *phydev)
 
        phydev->state = PHY_RUNNING;
        netif_carrier_on(phydev->attached_dev);
-       phydev->adjust_link(phydev->attached_dev);
+       if (phydev->adjust_link)
+               phydev->adjust_link(phydev->attached_dev);
 
        return 0;
 }
@@ -2083,7 +2262,7 @@ ar8xxx_phy_read_status(struct phy_device *phydev)
 static int
 ar8xxx_phy_config_aneg(struct phy_device *phydev)
 {
-       if (phydev->addr == 0)
+       if (phydev->mdio.addr == 0)
                return 0;
 
        return genphy_config_aneg(phydev);
@@ -2113,21 +2292,21 @@ ar8xxx_phy_match(u32 phy_id)
 static bool
 ar8xxx_is_possible(struct mii_bus *bus)
 {
-       unsigned i;
+       unsigned int i, found_phys = 0;
 
-       for (i = 0; i < 4; i++) {
+       for (i = 0; i < 5; i++) {
                u32 phy_id;
 
                phy_id = mdiobus_read(bus, i, MII_PHYSID1) << 16;
                phy_id |= mdiobus_read(bus, i, MII_PHYSID2);
-               if (!ar8xxx_phy_match(phy_id)) {
+               if (ar8xxx_phy_match(phy_id)) {
+                       found_phys++;
+               } else if (phy_id) {
                        pr_debug("ar8xxx: unknown PHY at %s:%02x id:%08x\n",
                                 dev_name(&bus->dev), i, phy_id);
-                       return false;
                }
        }
-
-       return true;
+       return !!found_phys;
 }
 
 static int
@@ -2138,15 +2317,15 @@ ar8xxx_phy_probe(struct phy_device *phydev)
        int ret;
 
        /* skip PHYs at unused adresses */
-       if (phydev->addr != 0 && phydev->addr != 4)
+       if (phydev->mdio.addr != 0 && phydev->mdio.addr != 3 && phydev->mdio.addr != 4)
                return -ENODEV;
 
-       if (!ar8xxx_is_possible(phydev->bus))
+       if (!ar8xxx_is_possible(phydev->mdio.bus))
                return -ENODEV;
 
        mutex_lock(&ar8xxx_dev_list_lock);
        list_for_each_entry(priv, &ar8xxx_dev_list, list)
-               if (priv->mii_bus == phydev->bus)
+               if (priv->mii_bus == phydev->mdio.bus)
                        goto found;
 
        priv = ar8xxx_create();
@@ -2155,7 +2334,12 @@ ar8xxx_phy_probe(struct phy_device *phydev)
                goto unlock;
        }
 
-       priv->mii_bus = phydev->bus;
+       priv->mii_bus = phydev->mdio.bus;
+       priv->pdev = &phydev->mdio.dev;
+
+       ret = ar8xxx_id_chip(priv);
+       if (ret)
+               goto free_priv;
 
        ret = ar8xxx_probe_switch(priv);
        if (ret)
@@ -2171,10 +2355,12 @@ ar8xxx_phy_probe(struct phy_device *phydev)
                swdev->devname, swdev->name, priv->chip_rev,
                dev_name(&priv->mii_bus->dev));
 
+       list_add(&priv->list, &ar8xxx_dev_list);
+
 found:
        priv->use_count++;
 
-       if (phydev->addr == 0) {
+       if (phydev->mdio.addr == 0) {
                if (ar8xxx_has_gige(priv)) {
                        phydev->supported = SUPPORTED_1000baseT_Full;
                        phydev->advertising = ADVERTISED_1000baseT_Full;
@@ -2195,12 +2381,12 @@ found:
                        phydev->supported |= SUPPORTED_1000baseT_Full;
                        phydev->advertising |= ADVERTISED_1000baseT_Full;
                }
+               if (priv->chip->phy_rgmii_set)
+                       priv->chip->phy_rgmii_set(priv, phydev);
        }
 
        phydev->priv = priv;
 
-       list_add(&priv->list, &ar8xxx_dev_list);
-
        mutex_unlock(&ar8xxx_dev_list_lock);
 
        return 0;
@@ -2241,10 +2427,14 @@ ar8xxx_phy_remove(struct phy_device *phydev)
                return;
 
        phydev->priv = NULL;
-       if (--priv->use_count > 0)
-               return;
 
        mutex_lock(&ar8xxx_dev_list_lock);
+
+       if (--priv->use_count > 0) {
+               mutex_unlock(&ar8xxx_dev_list_lock);
+               return;
+       }
+
        list_del(&priv->list);
        mutex_unlock(&ar8xxx_dev_list_lock);
 
@@ -2253,45 +2443,181 @@ ar8xxx_phy_remove(struct phy_device *phydev)
        ar8xxx_free(priv);
 }
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
 static int
 ar8xxx_phy_soft_reset(struct phy_device *phydev)
 {
        /* we don't need an extra reset */
        return 0;
 }
-#endif
 
-static struct phy_driver ar8xxx_phy_driver = {
-       .phy_id         = 0x004d0000,
-       .name           = "Atheros AR8216/AR8236/AR8316",
-       .phy_id_mask    = 0xffff0000,
-       .features       = PHY_BASIC_FEATURES,
-       .probe          = ar8xxx_phy_probe,
-       .remove         = ar8xxx_phy_remove,
-       .detach         = ar8xxx_phy_detach,
-       .config_init    = ar8xxx_phy_config_init,
-       .config_aneg    = ar8xxx_phy_config_aneg,
-       .read_status    = ar8xxx_phy_read_status,
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,14,0)
-       .soft_reset     = ar8xxx_phy_soft_reset,
-#endif
-       .driver         = { .owner = THIS_MODULE },
+static struct phy_driver ar8xxx_phy_driver[] = {
+       {
+               .phy_id         = 0x004d0000,
+               .name           = "Atheros AR8216/AR8236/AR8316",
+               .phy_id_mask    = 0xffff0000,
+               .features       = PHY_BASIC_FEATURES,
+               .probe          = ar8xxx_phy_probe,
+               .remove         = ar8xxx_phy_remove,
+               .detach         = ar8xxx_phy_detach,
+               .config_init    = ar8xxx_phy_config_init,
+               .config_aneg    = ar8xxx_phy_config_aneg,
+               .read_status    = ar8xxx_phy_read_status,
+               .soft_reset     = ar8xxx_phy_soft_reset,
+       }
+};
+
+static const struct of_device_id ar8xxx_mdiodev_of_match[] = {
+       {
+               .compatible = "qca,ar8229",
+               .data = &ar8229_chip,
+       }, {
+               .compatible = "qca,ar8236",
+               .data = &ar8236_chip,
+       }, {
+               .compatible = "qca,ar8327",
+               .data = &ar8327_chip,
+       },
+       { /* sentinel */ },
 };
 
-int __init
-ar8xxx_init(void)
+static int
+ar8xxx_mdiodev_probe(struct mdio_device *mdiodev)
 {
-       return phy_driver_register(&ar8xxx_phy_driver);
+       const struct of_device_id *match;
+       struct ar8xxx_priv *priv;
+       struct switch_dev *swdev;
+       struct device_node *mdio_node;
+       int ret;
+
+       match = of_match_device(ar8xxx_mdiodev_of_match, &mdiodev->dev);
+       if (!match)
+               return -EINVAL;
+
+       priv = ar8xxx_create();
+       if (priv == NULL)
+               return -ENOMEM;
+
+       priv->mii_bus = mdiodev->bus;
+       priv->pdev = &mdiodev->dev;
+       priv->chip = (const struct ar8xxx_chip *) match->data;
+
+       ret = ar8xxx_read_id(priv);
+       if (ret)
+               goto free_priv;
+
+       ret = ar8xxx_probe_switch(priv);
+       if (ret)
+               goto free_priv;
+
+       if (priv->chip->phy_read && priv->chip->phy_write) {
+               priv->sw_mii_bus = devm_mdiobus_alloc(&mdiodev->dev);
+               priv->sw_mii_bus->name = "ar8xxx-mdio";
+               priv->sw_mii_bus->read = ar8xxx_phy_read;
+               priv->sw_mii_bus->write = ar8xxx_phy_write;
+               priv->sw_mii_bus->priv = priv;
+               priv->sw_mii_bus->parent = &mdiodev->dev;
+               snprintf(priv->sw_mii_bus->id, MII_BUS_ID_SIZE, "%s",
+                        dev_name(&mdiodev->dev));
+               mdio_node = of_get_child_by_name(priv->pdev->of_node, "mdio-bus");
+               ret = of_mdiobus_register(priv->sw_mii_bus, mdio_node);
+               if (ret)
+                       goto free_priv;
+       }
+
+       swdev = &priv->dev;
+       swdev->alias = dev_name(&mdiodev->dev);
+       ret = register_switch(swdev, NULL);
+       if (ret)
+               goto free_priv;
+
+       pr_info("%s: %s rev. %u switch registered on %s\n",
+               swdev->devname, swdev->name, priv->chip_rev,
+               dev_name(&priv->mii_bus->dev));
+
+       mutex_lock(&ar8xxx_dev_list_lock);
+       list_add(&priv->list, &ar8xxx_dev_list);
+       mutex_unlock(&ar8xxx_dev_list_lock);
+
+       priv->use_count++;
+
+       ret = ar8xxx_start(priv);
+       if (ret)
+               goto err_unregister_switch;
+
+       dev_set_drvdata(&mdiodev->dev, priv);
+
+       return 0;
+
+err_unregister_switch:
+       if (--priv->use_count)
+               return ret;
+
+       unregister_switch(&priv->dev);
+
+free_priv:
+       ar8xxx_free(priv);
+       return ret;
+}
+
+static void
+ar8xxx_mdiodev_remove(struct mdio_device *mdiodev)
+{
+       struct ar8xxx_priv *priv = dev_get_drvdata(&mdiodev->dev);
+
+       if (WARN_ON(!priv))
+               return;
+
+       mutex_lock(&ar8xxx_dev_list_lock);
+
+       if (--priv->use_count > 0) {
+               mutex_unlock(&ar8xxx_dev_list_lock);
+               return;
+       }
+
+       list_del(&priv->list);
+       mutex_unlock(&ar8xxx_dev_list_lock);
+
+       unregister_switch(&priv->dev);
+       ar8xxx_mib_stop(priv);
+       if(priv->sw_mii_bus)
+               mdiobus_unregister(priv->sw_mii_bus);
+       ar8xxx_free(priv);
 }
 
-void __exit
-ar8xxx_exit(void)
+static struct mdio_driver ar8xxx_mdio_driver = {
+       .probe  = ar8xxx_mdiodev_probe,
+       .remove = ar8xxx_mdiodev_remove,
+       .mdiodrv.driver = {
+               .name = "ar8xxx-switch",
+               .of_match_table = ar8xxx_mdiodev_of_match,
+       },
+};
+
+static int __init ar8216_init(void)
 {
-       phy_driver_unregister(&ar8xxx_phy_driver);
+       int ret;
+
+       ret = phy_drivers_register(ar8xxx_phy_driver,
+                                  ARRAY_SIZE(ar8xxx_phy_driver),
+                                  THIS_MODULE);
+       if (ret)
+               return ret;
+
+       ret = mdio_driver_register(&ar8xxx_mdio_driver);
+       if (ret)
+               phy_drivers_unregister(ar8xxx_phy_driver,
+                                      ARRAY_SIZE(ar8xxx_phy_driver));
+
+       return ret;
 }
+module_init(ar8216_init);
 
-module_init(ar8xxx_init);
-module_exit(ar8xxx_exit);
-MODULE_LICENSE("GPL");
+static void __exit ar8216_exit(void)
+{
+       mdio_driver_unregister(&ar8xxx_mdio_driver);
+       phy_drivers_unregister(ar8xxx_phy_driver,
+                               ARRAY_SIZE(ar8xxx_phy_driver));
+}
+module_exit(ar8216_exit);
 
+MODULE_LICENSE("GPL");