[U-Boot] [PATCH 2/3] LS102XA:workaround:disable priorities within DDR

[Yuan Yao]

EDDRTQCFG Registers are Integration Strap values which controls
performance parameters for DDR Controller.

The bit 25 is used to disable priorities within DDR since DDR
are connected backwards on silicon Rev2.0.

Signed-off-by: Yuan Yao <yao.yuan at freescale.com>
---
 board/freescale/ls1021aqds/ls1021aqds.c | 13 ++++++++++++-
 board/freescale/ls1021atwr/ls1021atwr.c | 13 ++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/board/freescale/ls1021aqds/ls1021aqds.c b/board/freescale/ls1021aqds/ls1021aqds.c
index 52bffc8..1256ece 100644
--- a/board/freescale/ls1021aqds/ls1021aqds.c
+++ b/board/freescale/ls1021aqds/ls1021aqds.c
@@ -277,7 +277,7 @@ int board_early_init_f(void)
 {
 	struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;
 	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
-	unsigned int major;
+	unsigned int major, reg;
 
 #ifdef CONFIG_TSEC_ENET
 	out_be32(&scfg->etsecdmamcr, SCFG_ETSECDMAMCR_LE_BD_FR);
@@ -309,6 +309,17 @@ int board_early_init_f(void)
 	out_be32(&scfg->eddrtqcfg, 0x63b20002);
 
 	/*
+	 * EDDRTQCFG Registers are Integration Strap values which controls
+	 * performance parameters for DDR Controller.
+	 * The bit 25(0x40) is used for disable priorities within DDR.
+	 * This is a workaround because of the DDR are connected backwards
+	 * on Rev2.0.
+	 */
+	reg = in_be32(&scfg->eddrtqcfg);
+	reg |= 0x40;
+	out_be32(&scfg->eddrtqcfg, reg);
+
+	/*
 	 * Enable snoop requests and DVM message requests for
 	 * Slave insterface S4 (A7 core cluster)
 	 */
diff --git a/board/freescale/ls1021atwr/ls1021atwr.c b/board/freescale/ls1021atwr/ls1021atwr.c
index c565e91..53bea95 100644
--- a/board/freescale/ls1021atwr/ls1021atwr.c
+++ b/board/freescale/ls1021atwr/ls1021atwr.c
@@ -478,7 +478,7 @@ int board_early_init_f(void)
 {
 	struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;
 	struct ccsr_cci400 *cci = (struct ccsr_cci400 *)CONFIG_SYS_CCI400_ADDR;
-	unsigned int major;
+	unsigned int major, reg;
 
 #ifdef CONFIG_TSEC_ENET
 	out_be32(&scfg->etsecdmamcr, SCFG_ETSECDMAMCR_LE_BD_FR);
@@ -511,6 +511,17 @@ int board_early_init_f(void)
 	out_be32(&scfg->eddrtqcfg, 0x63b20002);
 
 	/*
+	 * EDDRTQCFG Registers are Integration Strap values which controls
+	 * performance parameters for DDR Controller.
+	 * The bit 25(0x40) is used for disable priorities within DDR.
+	 * This is a workaround because of the DDR are connected backwards
+	 * on Rev2.0.
+	 */
+	reg = in_be32(&scfg->eddrtqcfg);
+	reg |= 0x40;
+	out_be32(&scfg->eddrtqcfg, reg);
+
+	/*
 	 * Enable snoop requests and DVM message requests for
 	 * Slave insterface S4 (A7 core cluster)
 	 */
-- 
2.1.0.27.g96db324