net: dsa: b53: Turn on Broadcom tags

Enable Broadcom tags for b53 devices, except 5325 and 5365 which use a
different Broadcom tag format not yet supported by net/dsa/tag_brcm.c.

We also make sure that we can turn on Broadcom tags on a CPU port number
that is capable of that: 5, 7 or 8.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/b53/Kconfig b/drivers/net/dsa/b53/Kconfig
index 27f32a5..b413d10 100644 (file)
--- a/drivers/net/dsa/b53/Kconfig
+++ b/drivers/net/dsa/b53/Kconfig
@@ -1,6 +1,7 @@
 menuconfig B53
        tristate "Broadcom BCM53xx managed switch support"
        depends on NET_DSA
+       select NET_DSA_TAG_BRCM
        help
          This driver adds support for Broadcom managed switch chips. It supports
          BCM5325E, BCM5365, BCM539x, BCM53115 and BCM53125 as well as BCM63XX

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 17f1248..44a9a03 100644 (file)
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -325,7 +325,6 @@ static void b53_get_vlan_entry(struct b53_device *dev, u16 vid,
 
 static void b53_set_forwarding(struct b53_device *dev, int enable)
 {
-       struct dsa_switch *ds = dev->ds;
        u8 mgmt;
 
        b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, &mgmt);
@@ -337,14 +336,11 @@ static void b53_set_forwarding(struct b53_device *dev, int enable)
 
        b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_MODE, mgmt);
 
-       /* Include IMP port in dumb forwarding mode when no tagging protocol is
-        * set
+       /* Include IMP port in dumb forwarding mode
         */
-       if (ds->ops->get_tag_protocol(ds) == DSA_TAG_PROTO_NONE) {
-               b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
-               mgmt |= B53_MII_DUMB_FWDG_EN;
-               b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
-       }
+       b53_read8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, &mgmt);
+       mgmt |= B53_MII_DUMB_FWDG_EN;
+       b53_write8(dev, B53_CTRL_PAGE, B53_SWITCH_CTRL, mgmt);
 }
 
 static void b53_enable_vlan(struct b53_device *dev, bool enable)
@@ -612,6 +608,8 @@ static void b53_enable_cpu_port(struct b53_device *dev, int port)
                    PORT_CTRL_RX_MCST_EN |
                    PORT_CTRL_RX_UCST_EN;
        b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), port_ctrl);
+
+       b53_brcm_hdr_setup(dev->ds, port);
 }
 
 static void b53_enable_mib(struct b53_device *dev)
@@ -1480,9 +1478,41 @@ void b53_br_fast_age(struct dsa_switch *ds, int port)
 }
 EXPORT_SYMBOL(b53_br_fast_age);
 
+static bool b53_can_enable_brcm_tags(struct dsa_switch *ds)
+{
+       unsigned int brcm_tag_mask;
+       unsigned int i;
+
+       /* Broadcom switches will accept enabling Broadcom tags on the
+        * following ports: 5, 7 and 8, any other port is not supported
+        */
+       brcm_tag_mask = BIT(B53_CPU_PORT_25) | BIT(7) | BIT(B53_CPU_PORT);
+
+       for (i = 0; i < ds->num_ports; i++) {
+               if (dsa_is_cpu_port(ds, i)) {
+                       if (!(BIT(i) & brcm_tag_mask)) {
+                               dev_warn(ds->dev,
+                                        "Port %d is not Broadcom tag capable\n",
+                                        i);
+                               return false;
+                       }
+               }
+       }
+
+       return true;
+}
+
 static enum dsa_tag_protocol b53_get_tag_protocol(struct dsa_switch *ds)
 {
-       return DSA_TAG_PROTO_NONE;
+       struct b53_device *dev = ds->priv;
+
+       /* Older models support a different tag format that we do not
+        * support in net/dsa/tag_brcm.c yet.
+        */
+       if (is5325(dev) || is5365(dev) || !b53_can_enable_brcm_tags(ds))
+               return DSA_TAG_PROTO_NONE;
+       else
+               return DSA_TAG_PROTO_BRCM;
 }
 
 int b53_mirror_add(struct dsa_switch *ds, int port,