[U-Boot-Users] [PATCH] MPC8568E-MDS: reset UCCs to use them reliably

[Anton Vorontsov <avorontsov@ru.mvista.com>]

In order to use GETH1 and GETH2 on the MPC8568E-MDS, we should reset
UCCs.

p.s Similar code exists in the Linux kernel board file (for capability
reasons with older U-Boots), but should be removed some day.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
 board/mpc8568mds/bcsr.c       |   21 +++++++++++++++++++++
 board/mpc8568mds/bcsr.h       |    9 +++++++++
 board/mpc8568mds/mpc8568mds.c |    3 +++
 3 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/board/mpc8568mds/bcsr.c b/board/mpc8568mds/bcsr.c
index aae0f98..791a50f 100644
--- a/board/mpc8568mds/bcsr.c
+++ b/board/mpc8568mds/bcsr.c
@@ -21,6 +21,8 @@
  */
 
 #include <common.h>
+#include <asm/io.h>
+
 #include "bcsr.h"
 
 void enable_8568mds_duart()
@@ -54,3 +56,22 @@ void enable_8568mds_qe_mdio()
 
 	bcsr[7] |= 0x01;
 }
+
+#if defined(CONFIG_UEC_ETH1) || defined(CONFIG_UEC_ETH2)
+void reset_8568mds_uccs(void)
+{
+	volatile u8 *bcsr = (u8 *)(CFG_BCSR);
+
+	/* Turn off UCC1 & UCC2 */
+	out_8(&bcsr[8], in_8(&bcsr[8]) & ~BCSR_UCC1_GETH_EN);
+	out_8(&bcsr[9], in_8(&bcsr[9]) & ~BCSR_UCC2_GETH_EN);
+
+	/* Mode is RGMII, all bits clear */
+	out_8(&bcsr[11], in_8(&bcsr[11]) & ~(BCSR_UCC1_MODE_MSK |
+					     BCSR_UCC2_MODE_MSK));
+
+	/* Turn UCC1 & UCC2 on */
+	out_8(&bcsr[8], in_8(&bcsr[8]) | BCSR_UCC1_GETH_EN);
+	out_8(&bcsr[9], in_8(&bcsr[9]) | BCSR_UCC2_GETH_EN);
+}
+#endif
diff --git a/board/mpc8568mds/bcsr.h b/board/mpc8568mds/bcsr.h
index aefd9bf..f7f70bc 100644
--- a/board/mpc8568mds/bcsr.h
+++ b/board/mpc8568mds/bcsr.h
@@ -90,6 +90,11 @@
 	7	Flash write protect
 */
 
+#define BCSR_UCC1_GETH_EN	(0x1 << 7)
+#define BCSR_UCC2_GETH_EN	(0x1 << 7)
+#define BCSR_UCC1_MODE_MSK	(0x3 << 4)
+#define BCSR_UCC2_MODE_MSK	(0x3 << 0)
+
 /*BCSR Utils functions*/
 
 void enable_8568mds_duart(void);
@@ -97,4 +102,8 @@ void enable_8568mds_flash_write(void);
 void disable_8568mds_flash_write(void);
 void enable_8568mds_qe_mdio(void);
 
+#if defined(CONFIG_UEC_ETH1) || defined(CONFIG_UEC_ETH2)
+void reset_8568mds_uccs(void);
+#endif
+
 #endif	/* __BCSR_H_ */
diff --git a/board/mpc8568mds/mpc8568mds.c b/board/mpc8568mds/mpc8568mds.c
index 818ff13..2b3f44f 100644
--- a/board/mpc8568mds/mpc8568mds.c
+++ b/board/mpc8568mds/mpc8568mds.c
@@ -106,6 +106,9 @@ int board_early_init_f (void)
 
 	enable_8568mds_duart();
 	enable_8568mds_flash_write();
+#if defined(CONFIG_UEC_ETH1) || defined(CONFIG_UEC_ETH2)
+	reset_8568mds_uccs();
+#endif
 #if defined(CONFIG_QE) && !defined(CONFIG_eTSEC_MDIO_BUS)
 	enable_8568mds_qe_mdio();
 #endif
-- 
1.5.0.6