[U-Boot] Fwd: [PATCH] MPC5200 FEC MII speed register

[Jon Smirl]

John, could you please apply this.

Without this the MII commands don't work on any of the mpc5200
platforms. mpc5xxx_fec_halt() sets the mii speed register to zero it
needs to left at a non-zero speed for the commands to function.

---------- Forwarded message ----------
From: Jon <jonsmirl at gmail.com>
Date: Wed, Mar 11, 2009 at 3:08 PM
Subject: [PATCH] MPC5200 FEC MII speed register
To: u-boot at lists.denx.de


From: Jon Smirl <jonsmirl at gmail.com>

Set a non-zero speed in the MII register so that MII commands will work.

Signed-off-by: Jon Smirl <jonsmirl at gmail.com>
---
 drivers/net/mpc5xxx_fec.c |   23 ++++++++++++++++-------
 1 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/drivers/net/mpc5xxx_fec.c b/drivers/net/mpc5xxx_fec.c
index 89e91c3..1876b76 100644
--- a/drivers/net/mpc5xxx_fec.c
+++ b/drivers/net/mpc5xxx_fec.c
@@ -285,13 +285,6 @@ static int mpc5xxx_fec_init(struct eth_device
*dev, bd_t * bis)
       }

       fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
-       if (fec->xcv_type != SEVENWIRE) {
-               /*
-                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
-                * and do not drop the Preamble.
-                */
-               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
1); /* No MII for 7-wire mode */
-       }

       /*
        * Set Opcode/Pause Duration Register
@@ -649,6 +642,15 @@ static void mpc5xxx_fec_halt(struct eth_device *dev)
        */
       udelay(10);

+       /* don't leave the MII speed set to zero */
+       if (fec->xcv_type != SEVENWIRE) {
+               /*
+                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+                * and do not drop the Preamble.
+                */
+               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
1); /* No MII for 7-wire mode */
+       }
+
 #if (DEBUG & 0x3)
       printf("Ethernet task stopped\n");
 #endif
@@ -906,6 +908,13 @@ int mpc5xxx_fec_initialize(bd_t * bis)
 #else
 #error fec->xcv_type not initialized.
 #endif
+       if (fec->xcv_type != SEVENWIRE) {
+               /*
+                * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+                * and do not drop the Preamble.
+                */
+               fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) <<
1); /* No MII for 7-wire mode */
+       }

       dev->priv = (void *)fec;
       dev->iobase = MPC5XXX_FEC;




-- 
Jon Smirl
jonsmirl at gmail.com