Coldfire: mcfmii: Allow non-autonegotiating PHYs to use mii command

Modified mii_init to support boards with PHYs that are not set to
autonegotiate, but still want to use u-boot's mii commands to probe
the smi bus. Such PHYs will not set the Autonegotiate-done bit.

Signed-off-by: Richard Retanubun <RichardRetanubun@RuggedCom.com>

diff --git a/drivers/net/mcfmii.c b/drivers/net/mcfmii.c
index 2b733c6..4f1c0a0 100644 (file)
--- a/drivers/net/mcfmii.c
+++ b/drivers/net/mcfmii.c
@@ -226,7 +226,8 @@ void __mii_init(void)
        volatile FEC_T *fecp;
        struct eth_device *dev;
        int miispd = 0, i = 0;
-       u16 autoneg = 0;
+       u16 status = 0;
+       u16 linkgood = 0;
 
        /* retrieve from register structure */
        dev = eth_get_dev();
@@ -250,22 +251,32 @@ void __mii_init(void)
 
        info->phy_addr = mii_discover_phy(dev);
 
-#define AUTONEGLINK            (PHY_BMSR_AUTN_COMP | PHY_BMSR_LS)
        while (i < MCFFEC_TOUT_LOOP) {
-               autoneg = 0;
-               miiphy_read(dev->name, info->phy_addr, PHY_BMSR, &autoneg);
+               status = 0;
                i++;
-
-               if ((autoneg & AUTONEGLINK) == AUTONEGLINK)
+               /* Read PHY control register */
+               miiphy_read(dev->name, info->phy_addr, PHY_BMCR, &status);
+
+               /* If phy set to autonegotiate, wait for autonegotiation done,
+                * if phy is not autonegotiating, just wait for link up.
+                */
+               if ((status & PHY_BMCR_AUTON) == PHY_BMCR_AUTON) {
+                       linkgood = (PHY_BMSR_AUTN_COMP | PHY_BMSR_LS);
+               } else {
+                       linkgood = PHY_BMSR_LS;
+               }
+               /* Read PHY status register */
+               miiphy_read(dev->name, info->phy_addr, PHY_BMSR, &status);
+               if ((status & linkgood) == linkgood)
                        break;
 
                udelay(500);
        }
        if (i >= MCFFEC_TOUT_LOOP) {
-               printf("Auto Negotiation not complete\n");
+               printf("Link UP timeout\n");
        }
 
-       /* adapt to the half/full speed settings */
+       /* adapt to the duplex and speed settings of the phy */
        info->dup_spd = miiphy_duplex(dev->name, info->phy_addr) << 16;
        info->dup_spd |= miiphy_speed(dev->name, info->phy_addr);
 }