net: dsa: bcm_sf2: Introduce helper for port override offset

Depending upon the generation of switches, we have different offsets for
configuring a given port's status override where link parameters are
applied. Introduce a helper function that we re-use throughout the code
in order to let phylink callbacks configure the IMP/CPU port(s) in
subsequent changes.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index be0edfa..10de0cf 100644 (file)
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -94,6 +94,24 @@ static u16 bcm_sf2_reg_led_base(struct bcm_sf2_priv *priv, int port)
        return REG_SWITCH_STATUS;
 }
 
+static u32 bcm_sf2_port_override_offset(struct bcm_sf2_priv *priv, int port)
+{
+       switch (priv->type) {
+       case BCM4908_DEVICE_ID:
+       case BCM7445_DEVICE_ID:
+               return port == 8 ? CORE_STS_OVERRIDE_IMP :
+                                  CORE_STS_OVERRIDE_GMIIP_PORT(port);
+       case BCM7278_DEVICE_ID:
+               return port == 8 ? CORE_STS_OVERRIDE_IMP2 :
+                                  CORE_STS_OVERRIDE_GMIIP2_PORT(port);
+       default:
+               WARN_ONCE(1, "Unsupported device: %d\n", priv->type);
+       }
+
+       /* RO fallback register */
+       return REG_SWITCH_STATUS;
+}
+
 /* Return the number of active ports, not counting the IMP (CPU) port */
 static unsigned int bcm_sf2_num_active_ports(struct dsa_switch *ds)
 {
@@ -167,11 +185,7 @@ static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
        b53_brcm_hdr_setup(ds, port);
 
        if (port == 8) {
-               if (priv->type == BCM4908_DEVICE_ID ||
-                   priv->type == BCM7445_DEVICE_ID)
-                       offset = CORE_STS_OVERRIDE_IMP;
-               else
-                       offset = CORE_STS_OVERRIDE_IMP2;
+               offset = bcm_sf2_port_override_offset(priv, port);
 
                /* Force link status for IMP port */
                reg = core_readl(priv, offset);
@@ -813,12 +827,7 @@ static void bcm_sf2_sw_mac_link_down(struct dsa_switch *ds, int port,
                return;
 
        if (port != core_readl(priv, CORE_IMP0_PRT_ID)) {
-               if (priv->type == BCM4908_DEVICE_ID ||
-                   priv->type == BCM7445_DEVICE_ID)
-                       offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
-               else
-                       offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
-
+               offset = bcm_sf2_port_override_offset(priv, port);
                reg = core_readl(priv, offset);
                reg &= ~LINK_STS;
                core_writel(priv, reg, offset);
@@ -843,11 +852,7 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
                u32 reg_rgmii_ctrl = 0;
                u32 reg, offset;
 
-               if (priv->type == BCM4908_DEVICE_ID ||
-                   priv->type == BCM7445_DEVICE_ID)
-                       offset = CORE_STS_OVERRIDE_GMIIP_PORT(port);
-               else
-                       offset = CORE_STS_OVERRIDE_GMIIP2_PORT(port);
+               offset = bcm_sf2_port_override_offset(priv, port);
 
                if (interface == PHY_INTERFACE_MODE_RGMII ||
                    interface == PHY_INTERFACE_MODE_RGMII_TXID ||