[U-Boot] [PATCH 5/5] i.mx6q: mx6qsabrelite: Update the network configuration

[Dirk Behme]

From: Troy Kisky <troy.kisky at boundarydevices.com>

Enable the usage of PHY_MICREL_KSZ9021, force the master mode and
minimize the tx clock delay.

There is an issue with the gigabit ethernet mode at the SabreLite boards:
When operating on a Gb LAN, the FEC occasionally receives packets larger
than the MTU that appear to be caused by concatenation of multiple
received packets into one.
The problem was identified on the phy side. The current schematic has the
center tap pin 9 of the MAG/JAC USB combo to 3.3 filtered supply. Letting
this pin float solves the problem.

Signed-off-by: Troy Kisky <troy.kisky at boundarydevices.com>
CC: Troy Kisky <troy.kisky at boundarydevices.com>
CC: Stefano Babic <sbabic at denx.de>
CC: Jason Liu <jason.hui at linaro.org>
---
Note: This patch depends on the basic SabreLite ethernet patch
      http://patchwork.ozlabs.org/patch/135744/

 board/freescale/mx6qsabrelite/mx6qsabrelite.c |    8 ++++++--
 include/configs/mx6qsabrelite.h               |    1 +
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx6qsabrelite/mx6qsabrelite.c b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
index d80165e..7879049 100644
--- a/board/freescale/mx6qsabrelite/mx6qsabrelite.c
+++ b/board/freescale/mx6qsabrelite/mx6qsabrelite.c
@@ -193,13 +193,17 @@ int board_mmc_init(bd_t *bis)
 
 int fecmxc_mii_postcall(int phy)
 {
-	/* prefer master mode */
-	miiphy_write("FEC", phy, MII_1000BASET_CTRL, 0x0f00);
+	/* force master mode */
+	miiphy_write("FEC", phy, MII_1000BASET_CTRL, 0x1f00);
 
 	/* min rx data delay */
 	miiphy_write("FEC", phy, MII_EXTENDED_CTRL, 0x8105);
 	miiphy_write("FEC", phy, MII_EXTENDED_DATAW, 0x0000);
 
+	/* min tx data delay */
+	miiphy_write("FEC", phy, MII_EXTENDED_CTRL, 0x8106);
+	miiphy_write("FEC", phy, MII_EXTENDED_DATAW, 0x0000);
+
 	/* max rx/tx clock delay, min rx/tx control delay */
 	miiphy_write("FEC", phy, MII_EXTENDED_CTRL, 0x8104);
 	miiphy_write("FEC", phy, MII_EXTENDED_DATAW, 0xf0f0);
diff --git a/include/configs/mx6qsabrelite.h b/include/configs/mx6qsabrelite.h
index 840e271..6a29142 100644
--- a/include/configs/mx6qsabrelite.h
+++ b/include/configs/mx6qsabrelite.h
@@ -66,6 +66,7 @@
 #define	CONFIG_FEC_XCV_TYPE		RGMII
 #define CONFIG_ETHPRIME			"FEC"
 #define CONFIG_FEC_MXC_PHYADDR		6
+#define CONFIG_PHY_MICREL_KSZ9021
 
 /* allow to overwrite serial and ethaddr */
 #define CONFIG_ENV_OVERWRITE
-- 
1.7.0.4