net/ucc_geth: Add SGMII support for UEC GETH driver
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index 0cf22c4..fd6140b 100644
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2006-2007 Freescale Semicondutor, Inc. All rights reserved.
+ * Copyright (C) 2006-2009 Freescale Semicondutor, Inc. All rights reserved.
*
* Author: Shlomi Gridish <gridish@freescale.com>
* Li Yang <leoli@freescale.com>
@@ -65,6 +65,8 @@
static DEFINE_SPINLOCK(ugeth_lock);
+static void uec_configure_serdes(struct net_device *dev);
+
static struct {
u32 msg_enable;
} debug = { -1 };
@@ -1410,6 +1412,9 @@
(ugeth->phy_interface == PHY_INTERFACE_MODE_RTBI)) {
upsmr |= UCC_GETH_UPSMR_TBIM;
}
+ if ((ugeth->phy_interface == PHY_INTERFACE_MODE_SGMII))
+ upsmr |= UCC_GETH_UPSMR_SGMM;
+
out_be32(&uf_regs->upsmr, upsmr);
/* Disable autonegotiation in tbi mode, because by default it
@@ -1554,6 +1559,9 @@
return -ENODEV;
}
+ if (priv->phy_interface == PHY_INTERFACE_MODE_SGMII)
+ uec_configure_serdes(dev);
+
phydev->supported &= (ADVERTISED_10baseT_Half |
ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half |
@@ -1569,7 +1577,41 @@
return 0;
}
+/* Initialize TBI PHY interface for communicating with the
+ * SERDES lynx PHY on the chip. We communicate with this PHY
+ * through the MDIO bus on each controller, treating it as a
+ * "normal" PHY at the address found in the UTBIPA register. We assume
+ * that the UTBIPA register is valid. Either the MDIO bus code will set
+ * it to a value that doesn't conflict with other PHYs on the bus, or the
+ * value doesn't matter, as there are no other PHYs on the bus.
+ */
+static void uec_configure_serdes(struct net_device *dev)
+{
+ struct ucc_geth_private *ugeth = netdev_priv(dev);
+ if (!ugeth->tbiphy) {
+ printk(KERN_WARNING "SGMII mode requires that the device "
+ "tree specify a tbi-handle\n");
+ return;
+ }
+
+ /*
+ * If the link is already up, we must already be ok, and don't need to
+ * configure and reset the TBI<->SerDes link. Maybe U-Boot configured
+ * everything for us? Resetting it takes the link down and requires
+ * several seconds for it to come back.
+ */
+ if (phy_read(ugeth->tbiphy, ENET_TBI_MII_SR) & TBISR_LSTATUS)
+ return;
+
+ /* Single clk mode, mii mode off(for serdes communication) */
+ phy_write(ugeth->tbiphy, ENET_TBI_MII_ANA, TBIANA_SETTINGS);
+
+ phy_write(ugeth->tbiphy, ENET_TBI_MII_TBICON, TBICON_CLK_SELECT);
+
+ phy_write(ugeth->tbiphy, ENET_TBI_MII_CR, TBICR_SETTINGS);
+
+}
static int ugeth_graceful_stop_tx(struct ucc_geth_private *ugeth)
{
@@ -3523,6 +3565,8 @@
return PHY_INTERFACE_MODE_RGMII_RXID;
if (strcasecmp(phy_connection_type, "rtbi") == 0)
return PHY_INTERFACE_MODE_RTBI;
+ if (strcasecmp(phy_connection_type, "sgmii") == 0)
+ return PHY_INTERFACE_MODE_SGMII;
return PHY_INTERFACE_MODE_MII;
}
@@ -3567,6 +3611,7 @@
PHY_INTERFACE_MODE_RMII, PHY_INTERFACE_MODE_RGMII,
PHY_INTERFACE_MODE_GMII, PHY_INTERFACE_MODE_RGMII,
PHY_INTERFACE_MODE_TBI, PHY_INTERFACE_MODE_RTBI,
+ PHY_INTERFACE_MODE_SGMII,
};
ugeth_vdbg("%s: IN", __func__);
@@ -3682,6 +3727,7 @@
case PHY_INTERFACE_MODE_RGMII_TXID:
case PHY_INTERFACE_MODE_TBI:
case PHY_INTERFACE_MODE_RTBI:
+ case PHY_INTERFACE_MODE_SGMII:
max_speed = SPEED_1000;
break;
default:
@@ -3756,6 +3802,37 @@
ugeth->ndev = dev;
ugeth->node = np;
+ /* Find the TBI PHY. If it's not there, we don't support SGMII */
+ ph = of_get_property(np, "tbi-handle", NULL);
+ if (ph) {
+ struct device_node *tbi = of_find_node_by_phandle(*ph);
+ struct of_device *ofdev;
+ struct mii_bus *bus;
+ const unsigned int *id;
+
+ if (!tbi)
+ return 0;
+
+ mdio = of_get_parent(tbi);
+ if (!mdio)
+ return 0;
+
+ ofdev = of_find_device_by_node(mdio);
+
+ of_node_put(mdio);
+
+ id = of_get_property(tbi, "reg", NULL);
+ if (!id)
+ return 0;
+ of_node_put(tbi);
+
+ bus = dev_get_drvdata(&ofdev->dev);
+ if (!bus)
+ return 0;
+
+ ugeth->tbiphy = bus->phy_map[*id];
+ }
+
return 0;
}