Don't wait for disconnected TSECs

The TSEC driver's PHY code waits a long time for autonegotiation to
complete, even if the link is down.  The PHY knows the link is
down or up before autonegotiation completes, so we can short-circuit
the process if the link is down.

Signed-off-by: Andy Fleming <afleming@freescale.com>

diff --git a/drivers/tsec.c b/drivers/tsec.c
index 1df8f7d..6bca4dc 100644 (file)
--- a/drivers/tsec.c
+++ b/drivers/tsec.c
@@ -347,17 +347,16 @@ uint mii_cr_init(uint mii_reg, struct tsec_private * priv)
 uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
 {
        /*
-        * Wait if PHY is capable of autonegotiation and autonegotiation
-        * is not complete.
+        * Wait if the link is up, and autonegotiation is in progress
+        * (ie - we're capable and it's not done)
         */
        mii_reg = read_phy_reg(priv, MIIM_STATUS);
-       if ((mii_reg & PHY_BMSR_AUTN_ABLE)
+       if ((mii_reg & MIIM_STATUS_LINK) && (mii_reg & PHY_BMSR_AUTN_ABLE)
            && !(mii_reg & PHY_BMSR_AUTN_COMP)) {
                int i = 0;
 
                puts("Waiting for PHY auto negotiation to complete");
-               while (!((mii_reg & PHY_BMSR_AUTN_COMP)
-                        && (mii_reg & MIIM_STATUS_LINK))) {
+               while (!(mii_reg & PHY_BMSR_AUTN_COMP)) {
                        /*
                         * Timeout reached ?
                         */
@@ -377,7 +376,10 @@ uint mii_parse_sr(uint mii_reg, struct tsec_private * priv)
                priv->link = 1;
                udelay(500000); /* another 500 ms (results in faster booting) */
        } else {
-               priv->link = 1;
+               if (mii_reg & MIIM_STATUS_LINK)
+                       priv->link = 1;
+               else
+                       priv->link = 0;
        }
 
        return 0;
@@ -517,16 +519,13 @@ uint mii_parse_88E1011_psr(uint mii_reg, struct tsec_private * priv)
 
        mii_reg = read_phy_reg(priv, MIIM_88E1011_PHY_STATUS);
 
-       if (!((mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE) &&
-             (mii_reg & MIIM_88E1011_PHYSTAT_LINK))) {
+       if ((mii_reg & MIIM_88E1011_PHYSTAT_LINK) &&
+               !(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
                int i = 0;
 
                puts("Waiting for PHY realtime link");
-               while (!((mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE) &&
-                        (mii_reg & MIIM_88E1011_PHYSTAT_LINK))) {
-                       /*
-                        * Timeout reached ?
-                        */
+               while (!(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
+                       /* Timeout reached ? */
                        if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
                                puts(" TIMEOUT !\n");
                                priv->link = 0;
@@ -541,6 +540,11 @@ uint mii_parse_88E1011_psr(uint mii_reg, struct tsec_private * priv)
                }
                puts(" done\n");
                udelay(500000); /* another 500 ms (results in faster booting) */
+       } else {
+               if (mii_reg & MIIM_88E1011_PHYSTAT_LINK)
+                       priv->link = 1;
+               else
+                       priv->link = 0;
        }
 
        if (mii_reg & MIIM_88E1011_PHYSTAT_DUPLEX)