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-rw-r--r--drivers/net/phy/teranetics.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/net/phy/teranetics.c b/drivers/net/phy/teranetics.c
index a13b48cee6..9d9397aadd 100644
--- a/drivers/net/phy/teranetics.c
+++ b/drivers/net/phy/teranetics.c
@@ -21,6 +21,7 @@
*
*/
#include <config.h>
+#include <common.h>
#include <phy.h>
#ifndef CONFIG_PHYLIB_10G
@@ -43,6 +44,38 @@ int tn2020_config(struct phy_device *phydev)
int tn2020_startup(struct phy_device *phydev)
{
+ unsigned int timeout = 5 * 1000; /* 5 second timeout */
+
+#define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
+ MDIO_PHYXS_LNSTAT_SYNC1 | \
+ MDIO_PHYXS_LNSTAT_SYNC2 | \
+ MDIO_PHYXS_LNSTAT_SYNC3 | \
+ MDIO_PHYXS_LNSTAT_ALIGN)
+
+ /*
+ * Wait for the XAUI-SERDES lanes to align first. Under normal
+ * circumstances, this can take up to three seconds.
+ */
+ while (--timeout) {
+ int reg = phy_read(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
+ if (reg < 0) {
+ printf("TN2020: Error reading from PHY at "
+ "address %u\n", phydev->addr);
+ break;
+ }
+ if ((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)
+ break;
+ udelay(1000);
+ }
+ if (!timeout) {
+ /*
+ * A timeout is bad, but it may not be fatal, so don't
+ * return an error. Display a warning instead.
+ */
+ printf("TN2020: Timeout waiting for PHY at address %u to "
+ "align.\n", phydev->addr);
+ }
+
if (phydev->port != PORT_FIBRE)
return gen10g_startup(phydev);