net: dsa: bcm_sf2: add support for controlling EEE

When EEE is enabled, negotiate this feature with the PHY and make sure
that the capability checking, local EEE advertisement, link partner EEE
advertisement and auto-negotiation resolution returned by phy_init_eee()
is positive, and enable EEE at the switch level.

While querying the current EEE settings, verify the low-power indication
and indicate its status.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 634e44ee8d0d5a957bb9a505b18212078f4bfc9b..b9625968daacc0eb89c0f7371a3a4e70242f95ce 100644 (file)
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -220,6 +220,19 @@ static void bcm_sf2_imp_setup(struct dsa_switch *ds, int port)
        core_writel(priv, reg, CORE_STS_OVERRIDE_IMP);
 }
 
+static void bcm_sf2_eee_enable_set(struct dsa_switch *ds, int port, bool enable)
+{
+       struct bcm_sf2_priv *priv = ds_to_priv(ds);
+       u32 reg;
+
+       reg = core_readl(priv, CORE_EEE_EN_CTRL);
+       if (enable)
+               reg |= 1 << port;
+       else
+               reg &= ~(1 << port);
+       core_writel(priv, reg, CORE_EEE_EN_CTRL);
+}
+
 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
                              struct phy_device *phy)
 {
@@ -247,6 +260,10 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 
        bcm_sf2_imp_vlan_setup(ds, cpu_port);
 
+       /* If EEE was enabled, restore it */
+       if (priv->port_sts[port].eee.eee_enabled)
+               bcm_sf2_eee_enable_set(ds, port, true);
+
        return 0;
 }
 
@@ -279,6 +296,60 @@ static void bcm_sf2_port_disable(struct dsa_switch *ds, int port,
        core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL);
 }
 
+/* Returns 0 if EEE was not enabled, or 1 otherwise
+ */
+static int bcm_sf2_eee_init(struct dsa_switch *ds, int port,
+                           struct phy_device *phy)
+{
+       struct bcm_sf2_priv *priv = ds_to_priv(ds);
+       struct ethtool_eee *p = &priv->port_sts[port].eee;
+       int ret;
+
+       p->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_100baseT_Full);
+
+       ret = phy_init_eee(phy, 0);
+       if (ret)
+               return 0;
+
+       bcm_sf2_eee_enable_set(ds, port, true);
+
+       return 1;
+}
+
+static int bcm_sf2_sw_get_eee(struct dsa_switch *ds, int port,
+                             struct ethtool_eee *e)
+{
+       struct bcm_sf2_priv *priv = ds_to_priv(ds);
+       struct ethtool_eee *p = &priv->port_sts[port].eee;
+       u32 reg;
+
+       reg = core_readl(priv, CORE_EEE_LPI_INDICATE);
+       e->eee_enabled = p->eee_enabled;
+       e->eee_active = !!(reg & (1 << port));
+
+       return 0;
+}
+
+static int bcm_sf2_sw_set_eee(struct dsa_switch *ds, int port,
+                             struct phy_device *phydev,
+                             struct ethtool_eee *e)
+{
+       struct bcm_sf2_priv *priv = ds_to_priv(ds);
+       struct ethtool_eee *p = &priv->port_sts[port].eee;
+
+       p->eee_enabled = e->eee_enabled;
+
+       if (!p->eee_enabled) {
+               bcm_sf2_eee_enable_set(ds, port, false);
+       } else {
+               p->eee_enabled = bcm_sf2_eee_init(ds, port, phydev);
+               if (!p->eee_enabled)
+                       return -EOPNOTSUPP;
+       }
+
+       return 0;
+}
+
 static irqreturn_t bcm_sf2_switch_0_isr(int irq, void *dev_id)
 {
        struct bcm_sf2_priv *priv = dev_id;
@@ -792,6 +863,8 @@ static struct dsa_switch_driver bcm_sf2_switch_driver = {
        .set_wol                = bcm_sf2_sw_set_wol,
        .port_enable            = bcm_sf2_port_setup,
        .port_disable           = bcm_sf2_port_disable,
+       .get_eee                = bcm_sf2_sw_get_eee,
+       .set_eee                = bcm_sf2_sw_set_eee,
 };
 
 static int __init bcm_sf2_init(void)

diff --git a/drivers/net/dsa/bcm_sf2.h b/drivers/net/dsa/bcm_sf2.h
index 8fd6c1451a84a5903776cbedd4bbec743a3c408d..ee9f650d50264bb74771783b65e860b2aabb3d46 100644 (file)
--- a/drivers/net/dsa/bcm_sf2.h
+++ b/drivers/net/dsa/bcm_sf2.h
@@ -18,6 +18,7 @@
 #include <linux/spinlock.h>
 #include <linux/mutex.h>
 #include <linux/mii.h>
+#include <linux/ethtool.h>
 
 #include <net/dsa.h>
 
@@ -43,6 +44,8 @@ struct bcm_sf2_hw_params {
 
 struct bcm_sf2_port_status {
        unsigned int link;
+
+       struct ethtool_eee eee;
 };
 
 struct bcm_sf2_priv {

diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h
index c65f138c777f5bd6a24495f2a40bdd674e454a2f..1bb49cb699ab02a5af7ef1de66ab6bbed0aa47ae 100644 (file)
--- a/drivers/net/dsa/bcm_sf2_regs.h
+++ b/drivers/net/dsa/bcm_sf2_regs.h
@@ -225,4 +225,7 @@
 #define CORE_PORT_VLAN_CTL_PORT(x)     (0xc400 + ((x) * 0x8))
 #define  PORT_VLAN_CTRL_MASK           0x1ff
 
+#define CORE_EEE_EN_CTRL               0x24800
+#define CORE_EEE_LPI_INDICATE          0x24810
+
 #endif /* __BCM_SF2_REGS_H */