powerpc/mpc8xxx: Add memory reset control

JEDEC spec requires the clocks to be stable before deasserting reset
signal for RDIMMs. Clocks start when any chip select is enabled and
clock control register is set. This patch also adds the interface to
toggle memory reset signal if needed by the boards.

Signed-off-by: York Sun <yorksun@freescale.com>

8 files changed, 28 insertions, 8 deletions

diff --git a/board/freescale/bsc9131rdb/ddr.c b/board/freescale/bsc9131rdb/ddr.c
index a4161ad..c82fe0a 100644
--- a/board/freescale/bsc9131rdb/ddr.c
+++ b/board/freescale/bsc9131rdb/ddr.c
@@ -87,7 +87,7 @@ phys_size_t fixed_sdram(void)
 	}
 
 	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size,
 					LAW_TRGT_IF_DDR_1) < 0) {
diff --git a/board/freescale/bsc9132qds/ddr.c b/board/freescale/bsc9132qds/ddr.c
index 05bea8a..fdea193 100644
--- a/board/freescale/bsc9132qds/ddr.c
+++ b/board/freescale/bsc9132qds/ddr.c
@@ -109,7 +109,7 @@ phys_size_t fixed_sdram(void)
 					strmhz(buf, ddr_freq));
 
 	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size,
 					LAW_TRGT_IF_DDR_1) < 0) {
diff --git a/board/freescale/common/qixis.c b/board/freescale/common/qixis.c
index 40ce6b0..a49e300 100644
--- a/board/freescale/common/qixis.c
+++ b/board/freescale/common/qixis.c
@@ -107,6 +107,26 @@ const char *byte_to_binary_mask(u8 val, u8 mask, char *buf)
 	return buf;
 }
 
+#ifdef QIXIS_RST_FORCE_MEM
+void board_assert_mem_reset(void)
+{
+	u8 rst;
+
+	rst = QIXIS_READ(rst_frc[0]);
+	if (!(rst & QIXIS_RST_FORCE_MEM))
+		QIXIS_WRITE(rst_frc[0], rst | QIXIS_RST_FORCE_MEM);
+}
+
+void board_deassert_mem_reset(void)
+{
+	u8 rst;
+
+	rst = QIXIS_READ(rst_frc[0]);
+	if (rst & QIXIS_RST_FORCE_MEM)
+		QIXIS_WRITE(rst_frc[0], rst & ~QIXIS_RST_FORCE_MEM);
+}
+#endif
+
 void qixis_reset(void)
 {
 	QIXIS_WRITE(rst_ctl, QIXIS_RST_CTL_RESET);
diff --git a/board/freescale/corenet_ds/ddr.c b/board/freescale/corenet_ds/ddr.c
index da284cd..517e87f 100644
--- a/board/freescale/corenet_ds/ddr.c
+++ b/board/freescale/corenet_ds/ddr.c
@@ -56,14 +56,14 @@ phys_size_t fixed_sdram(void)
 
 	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
 	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 #if (CONFIG_NUM_DDR_CONTROLLERS == 2)
 	memcpy(&ddr_cfg_regs,
 		fixed_ddr_parm_1[i].ddr_settings,
 		sizeof(ddr_cfg_regs));
 	ddr_cfg_regs.ddr_cdr1 = DDR_CDR1_DHC_EN;
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 1, 0);
 #endif
 
 	/*
diff --git a/board/freescale/p1010rdb/ddr.c b/board/freescale/p1010rdb/ddr.c
index aa8bada..681f052 100644
--- a/board/freescale/p1010rdb/ddr.c
+++ b/board/freescale/p1010rdb/ddr.c
@@ -139,7 +139,7 @@ phys_size_t fixed_sdram(void)
 	}
 
 	ddr_size = (phys_size_t) CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE, ddr_size,
 					LAW_TRGT_IF_DDR_1) < 0) {
diff --git a/board/freescale/p1_p2_rdb/ddr.c b/board/freescale/p1_p2_rdb/ddr.c
index 0038077..5bee22e 100644
--- a/board/freescale/p1_p2_rdb/ddr.c
+++ b/board/freescale/p1_p2_rdb/ddr.c
@@ -220,7 +220,7 @@ phys_size_t fixed_sdram (void)
 		ddr_cfg_regs.cs[0].bnds = 0x0000001F;
 	}
 
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	set_ddr_laws(0, ddr_size, LAW_TRGT_IF_DDR_1);
 	return ddr_size;
diff --git a/board/freescale/p1_p2_rdb_pc/ddr.c b/board/freescale/p1_p2_rdb_pc/ddr.c
index 9355536..14f0539 100644
--- a/board/freescale/p1_p2_rdb_pc/ddr.c
+++ b/board/freescale/p1_p2_rdb_pc/ddr.c
@@ -251,7 +251,7 @@ phys_size_t fixed_sdram(void)
 
 	ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
 
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
 				ddr_size, LAW_TRGT_IF_DDR_1) < 0) {
diff --git a/board/freescale/p1_twr/ddr.c b/board/freescale/p1_twr/ddr.c
index ff278ae..f94e1ab 100644
--- a/board/freescale/p1_twr/ddr.c
+++ b/board/freescale/p1_twr/ddr.c
@@ -59,7 +59,7 @@ phys_size_t fixed_sdram(void)
 
 	ddr_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
 
-	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0);
+	fsl_ddr_set_memctl_regs(&ddr_cfg_regs, 0, 0);
 
 	if (set_ddr_laws(CONFIG_SYS_DDR_SDRAM_BASE,
 				ddr_size, LAW_TRGT_IF_DDR_1) < 0) {