net: dsa: mv88e6xxx: setup port's MAC

Now that we have setters to configure the port's MAC, use them to
refactor the port setup and adjust_link code.

Note that port's MAC speed, duplex or RGMII delay must not be changed
unless the port's link is forced down. So wrap all that in a
mv88e6xxx_port_setup_mac function.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 23c05e3c9ed5553efac70cfb8b04e95faf915c02..c8f824d4ff265d6095c78b1d060f263b49fc12ab 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -701,6 +701,47 @@ static bool mv88e6xxx_6352_family(struct mv88e6xxx_chip *chip)
        return chip->info->family == MV88E6XXX_FAMILY_6352;
 }
 
+static int mv88e6xxx_port_setup_mac(struct mv88e6xxx_chip *chip, int port,
+                                   int link, int speed, int duplex,
+                                   phy_interface_t mode)
+{
+       int err;
+
+       if (!chip->info->ops->port_set_link)
+               return 0;
+
+       /* Port's MAC control must not be changed unless the link is down */
+       err = chip->info->ops->port_set_link(chip, port, 0);
+       if (err)
+               return err;
+
+       if (chip->info->ops->port_set_speed) {
+               err = chip->info->ops->port_set_speed(chip, port, speed);
+               if (err && err != -EOPNOTSUPP)
+                       goto restore_link;
+       }
+
+       if (chip->info->ops->port_set_duplex) {
+               err = chip->info->ops->port_set_duplex(chip, port, duplex);
+               if (err && err != -EOPNOTSUPP)
+                       goto restore_link;
+       }
+
+       if (chip->info->ops->port_set_rgmii_delay) {
+               err = chip->info->ops->port_set_rgmii_delay(chip, port, mode);
+               if (err && err != -EOPNOTSUPP)
+                       goto restore_link;
+       }
+
+       err = 0;
+restore_link:
+       if (chip->info->ops->port_set_link(chip, port, link))
+               netdev_err(chip->ds->ports[port].netdev,
+                          "failed to restore MAC's link\n");
+
+       return err;
+}
+
 /* We expect the switch to perform auto negotiation if there is a real
  * phy. However, in the case of a fixed link phy, we force the port
  * settings from the fixed link settings.
@@ -709,64 +750,18 @@ static void mv88e6xxx_adjust_link(struct dsa_switch *ds, int port,
                                  struct phy_device *phydev)
 {
        struct mv88e6xxx_chip *chip = ds->priv;
-       u16 reg;
        int err;
 
        if (!phy_is_pseudo_fixed_link(phydev))
                return;
 
        mutex_lock(&chip->reg_lock);
-
-       err = mv88e6xxx_port_read(chip, port, PORT_PCS_CTRL, &reg);
-       if (err)
-               goto out;
-
-       reg &= ~(PORT_PCS_CTRL_LINK_UP |
-                PORT_PCS_CTRL_FORCE_LINK |
-                PORT_PCS_CTRL_DUPLEX_FULL |
-                PORT_PCS_CTRL_FORCE_DUPLEX |
-                PORT_PCS_CTRL_SPEED_UNFORCED);
-
-       reg |= PORT_PCS_CTRL_FORCE_LINK;
-       if (phydev->link)
-               reg |= PORT_PCS_CTRL_LINK_UP;
-
-       if (mv88e6xxx_6065_family(chip) && phydev->speed > SPEED_100)
-               goto out;
-
-       switch (phydev->speed) {
-       case SPEED_1000:
-               reg |= PORT_PCS_CTRL_SPEED_1000;
-               break;
-       case SPEED_100:
-               reg |= PORT_PCS_CTRL_SPEED_100;
-               break;
-       case SPEED_10:
-               reg |= PORT_PCS_CTRL_SPEED_10;
-               break;
-       default:
-               pr_info("Unknown speed");
-               goto out;
-       }
-
-       reg |= PORT_PCS_CTRL_FORCE_DUPLEX;
-       if (phydev->duplex == DUPLEX_FULL)
-               reg |= PORT_PCS_CTRL_DUPLEX_FULL;
-
-       if ((mv88e6xxx_6352_family(chip) || mv88e6xxx_6351_family(chip)) &&
-           (port >= mv88e6xxx_num_ports(chip) - 2)) {
-               if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
-                       reg |= PORT_PCS_CTRL_RGMII_DELAY_RXCLK;
-               if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
-                       reg |= PORT_PCS_CTRL_RGMII_DELAY_TXCLK;
-               if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
-                       reg |= (PORT_PCS_CTRL_RGMII_DELAY_RXCLK |
-                               PORT_PCS_CTRL_RGMII_DELAY_TXCLK);
-       }
-       mv88e6xxx_port_write(chip, port, PORT_PCS_CTRL, reg);
-
-out:
+       err = mv88e6xxx_port_setup_mac(chip, port, phydev->link, phydev->speed,
+                                      phydev->duplex, phydev->interface);
        mutex_unlock(&chip->reg_lock);
+
+       if (err && err != -EOPNOTSUPP)
+               netdev_err(ds->ports[port].netdev, "failed to configure MAC\n");
 }
 
 static int _mv88e6xxx_stats_wait(struct mv88e6xxx_chip *chip)
@@ -2409,35 +2404,20 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
        int err;
        u16 reg;
 
-       if (mv88e6xxx_6352_family(chip) || mv88e6xxx_6351_family(chip) ||
-           mv88e6xxx_6165_family(chip) || mv88e6xxx_6097_family(chip) ||
-           mv88e6xxx_6185_family(chip) || mv88e6xxx_6095_family(chip) ||
-           mv88e6xxx_6065_family(chip) || mv88e6xxx_6320_family(chip)) {
-               /* MAC Forcing register: don't force link, speed,
-                * duplex or flow control state to any particular
-                * values on physical ports, but force the CPU port
-                * and all DSA ports to their maximum bandwidth and
-                * full duplex.
-                */
-               err = mv88e6xxx_port_read(chip, port, PORT_PCS_CTRL, &reg);
-               if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) {
-                       reg &= ~PORT_PCS_CTRL_SPEED_UNFORCED;
-                       reg |= PORT_PCS_CTRL_FORCE_LINK |
-                               PORT_PCS_CTRL_LINK_UP |
-                               PORT_PCS_CTRL_DUPLEX_FULL |
-                               PORT_PCS_CTRL_FORCE_DUPLEX;
-                       if (mv88e6xxx_6065_family(chip))
-                               reg |= PORT_PCS_CTRL_SPEED_100;
-                       else
-                               reg |= PORT_PCS_CTRL_SPEED_1000;
-               } else {
-                       reg |= PORT_PCS_CTRL_SPEED_UNFORCED;
-               }
-
-               err = mv88e6xxx_port_write(chip, port, PORT_PCS_CTRL, reg);
-               if (err)
-                       return err;
-       }
+       /* MAC Forcing register: don't force link, speed, duplex or flow control
+        * state to any particular values on physical ports, but force the CPU
+        * port and all DSA ports to their maximum bandwidth and full duplex.
+        */
+       if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
+               err = mv88e6xxx_port_setup_mac(chip, port, LINK_FORCED_UP,
+                                              SPEED_MAX, DUPLEX_FULL,
+                                              PHY_INTERFACE_MODE_NA);
+       else
+               err = mv88e6xxx_port_setup_mac(chip, port, LINK_UNFORCED,
+                                              SPEED_UNFORCED, DUPLEX_UNFORCED,
+                                              PHY_INTERFACE_MODE_NA);
+       if (err)
+               return err;
 
        /* Port Control: disable Drop-on-Unlock, disable Drop-on-Lock,
         * disable Header mode, enable IGMP/MLD snooping, disable VLAN