mv643xx_eth: print message on link status change

When there is a link status change (link or phy status interrupt),
print a message notifying the user of the new link status.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>

1 files changed, 69 insertions, 22 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 29d4fe37cd50..01dd3c505d25 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -91,6 +91,12 @@ static char mv643xx_eth_driver_version[] = "1.1";
 #define PORT_STATUS(p)                  (0x0444 + ((p) << 10))
 #define  TX_FIFO_EMPTY                  0x00000400
 #define  TX_IN_PROGRESS                 0x00000080
+#define  PORT_SPEED_MASK                0x00000030
+#define  PORT_SPEED_1000                0x00000010
+#define  PORT_SPEED_100                 0x00000020
+#define  PORT_SPEED_10                  0x00000000
+#define  FLOW_CONTROL_ENABLED           0x00000008
+#define  FULL_DUPLEX                    0x00000004
 #define  LINK_UP                        0x00000002
 #define TXQ_COMMAND(p)                  (0x0448 + ((p) << 10))
 #define TXQ_FIX_PRIO_CONF(p)            (0x044c + ((p) << 10))
@@ -1679,6 +1685,64 @@ static void txq_deinit(struct tx_queue *txq)
 
 
 /* netdev ops and related ***************************************************/
+static void handle_link_event(struct mv643xx_eth_private *mp)
+{
+        struct net_device *dev = mp->dev;
+        u32 port_status;
+        int speed;
+        int duplex;
+        int fc;
+
+        port_status = rdl(mp, PORT_STATUS(mp->port_num));
+        if (!(port_status & LINK_UP)) {
+                if (netif_carrier_ok(dev)) {
+                        int i;
+
+                        printk(KERN_INFO "%s: link down\n", dev->name);
+
+                        netif_carrier_off(dev);
+                        netif_stop_queue(dev);
+
+                        for (i = 0; i < 8; i++) {
+                                struct tx_queue *txq = mp->txq + i;
+
+                                if (mp->txq_mask & (1 << i)) {
+                                        txq_reclaim(txq, 1);
+                                        txq_reset_hw_ptr(txq);
+                                }
+                        }
+                }
+                return;
+        }
+
+        switch (port_status & PORT_SPEED_MASK) {
+        case PORT_SPEED_10:
+                speed = 10;
+                break;
+        case PORT_SPEED_100:
+                speed = 100;
+                break;
+        case PORT_SPEED_1000:
+                speed = 1000;
+                break;
+        default:
+                speed = -1;
+                break;
+        }
+        duplex = (port_status & FULL_DUPLEX) ? 1 : 0;
+        fc = (port_status & FLOW_CONTROL_ENABLED) ? 1 : 0;
+
+        printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
+                         "flow control %sabled\n", dev->name,
+                         speed, duplex ? "full" : "half",
+                         fc ? "en" : "dis");
+
+        if (!netif_carrier_ok(dev)) {
+                netif_carrier_on(dev);
+                netif_wake_queue(dev);
+        }
+}
+
 static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
 {
         struct net_device *dev = (struct net_device *)dev_id;
@@ -1698,28 +1762,8 @@ static irqreturn_t mv643xx_eth_irq(int irq, void *dev_id)
                 wrl(mp, INT_CAUSE_EXT(mp->port_num), ~int_cause_ext);
         }
 
-        if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK)) {
-                if (rdl(mp, PORT_STATUS(mp->port_num)) & LINK_UP) {
-                        if (!netif_carrier_ok(dev)) {
-                                netif_carrier_on(dev);
-                                netif_wake_queue(dev);
-                        }
-                } else if (netif_carrier_ok(dev)) {
-                        int i;
-
-                        netif_stop_queue(dev);
-                        netif_carrier_off(dev);
-
-                        for (i = 0; i < 8; i++) {
-                                struct tx_queue *txq = mp->txq + i;
-
-                                if (mp->txq_mask & (1 << i)) {
-                                        txq_reclaim(txq, 1);
-                                        txq_reset_hw_ptr(txq);
-                                }
-                        }
-                }
-        }
+        if (int_cause_ext & (INT_EXT_PHY | INT_EXT_LINK))
+                handle_link_event(mp);
 
         /*
          * RxBuffer or RxError set for any of the 8 queues?
@@ -1970,6 +2014,9 @@ static int mv643xx_eth_open(struct net_device *dev)
         napi_enable(&mp->napi);
 #endif
 
+        netif_carrier_off(dev);
+        netif_stop_queue(dev);
+
         port_start(mp);
 
         set_rx_coal(mp, 0);