mpc83xx: Rename CONFIG_SYS_DDR_CONFIG and cleanup DDR csbnds code

Rename CONFIG_SYS_DDR_CONFIG to include which CS it is configuring
Cleanup the setting of the csnbds to respect the setting of
CONFIG_SYS_DDR_SDRAM_BASE
Use __ilog2 instead of writing the code to compute it
Disable unused CS configs
Ensure ddrlaw.bar is configured

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

4 files changed, 63 insertions, 44 deletions

diff --git a/board/freescale/mpc8313erdb/sdram.c b/board/freescale/mpc8313erdb/sdram.c
index 7aede136d6..a9a2ba4706 100644
--- a/board/freescale/mpc8313erdb/sdram.c
+++ b/board/freescale/mpc8313erdb/sdram.c
@@ -74,8 +74,14 @@ static long fixed_sdram(void)
 	 */
 	__udelay(50000);
 
-	im->ddr.csbnds[0].csbnds = (msize - 1) >> 24;
-	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CONFIG;
+#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#warning Chip select bounds is only configurable in 16MB increments
+#endif
+	im->ddr.csbnds[0].csbnds =
+		((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_DDR_SDRAM_BASE + msize - 1) >> CSBNDS_EA_SHIFT) &
+			CSBNDS_EA);
+	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CS0_CONFIG;
 
 	/* Currently we use only one CS, so disable the other bank. */
 	im->ddr.cs_config[1] = 0;
diff --git a/board/freescale/mpc8349emds/mpc8349emds.c b/board/freescale/mpc8349emds/mpc8349emds.c
index 620540f830..ebd5274a56 100644
--- a/board/freescale/mpc8349emds/mpc8349emds.c
+++ b/board/freescale/mpc8349emds/mpc8349emds.c
@@ -101,18 +101,10 @@ phys_size_t initdram (int board_type)
 int fixed_sdram(void)
 {
 	volatile immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
-	u32 msize = 0;
-	u32 ddr_size;
-	u32 ddr_size_log2;
-
-	msize = CONFIG_SYS_DDR_SIZE;
-	for (ddr_size = msize << 20, ddr_size_log2 = 0;
-	     (ddr_size > 1);
-	     ddr_size = ddr_size>>1, ddr_size_log2++) {
-		if (ddr_size & 1) {
-			return -1;
-		}
-	}
+	u32 msize = CONFIG_SYS_DDR_SIZE;
+	u32 ddr_size = msize << 20;	/* DDR size in bytes */
+	u32 ddr_size_log2 = __ilog2(ddr_size);
+
 	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
 	im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
 
@@ -133,8 +125,15 @@ int fixed_sdram(void)
 	im->ddr.sdram_interval = CONFIG_SYS_DDR_INTERVAL;
 	im->ddr.sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CNTL;
 #else
-	im->ddr.csbnds[2].csbnds = 0x0000000f;
-	im->ddr.cs_config[2] = CONFIG_SYS_DDR_CONFIG;
+
+#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#warning Chip select bounds is only configurable in 16MB increments
+#endif
+	im->ddr.csbnds[2].csbnds =
+		((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
+				CSBNDS_EA_SHIFT) & CSBNDS_EA);
+	im->ddr.cs_config[2] = CONFIG_SYS_DDR_CS2_CONFIG;
 
 	/* currently we use only one CS, so disable the other banks */
 	im->ddr.cs_config[0] = 0;
diff --git a/board/freescale/mpc8349itx/mpc8349itx.c b/board/freescale/mpc8349itx/mpc8349itx.c
index 56475795b6..9cc808ed7d 100644
--- a/board/freescale/mpc8349itx/mpc8349itx.c
+++ b/board/freescale/mpc8349itx/mpc8349itx.c
@@ -43,23 +43,27 @@
 int fixed_sdram(void)
 {
 	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
-	u32 ddr_size;		/* The size of RAM, in bytes */
-	u32 ddr_size_log2 = 0;
-
-	for (ddr_size = CONFIG_SYS_DDR_SIZE * 0x100000; ddr_size > 1; ddr_size >>= 1) {
-		if (ddr_size & 1) {
-			return -1;
-		}
-		ddr_size_log2++;
-	}
+	/* The size of RAM, in bytes */
+	u32 ddr_size = CONFIG_SYS_DDR_SIZE << 20;
+	u32 ddr_size_log2 = __ilog2(ddr_size);
 
 	im->sysconf.ddrlaw[0].ar =
 	    LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
 	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
 
-	/* Only one CS0 for DDR */
-	im->ddr.csbnds[0].csbnds = 0x0000000f;
-	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CONFIG;
+#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#warning Chip select bounds is only configurable in 16MB increments
+#endif
+	im->ddr.csbnds[0].csbnds =
+		((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
+				CSBNDS_EA_SHIFT) & CSBNDS_EA);
+	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CS0_CONFIG;
+
+	/* Only one CS for DDR */
+	im->ddr.cs_config[1] = 0;
+	im->ddr.cs_config[2] = 0;
+	im->ddr.cs_config[3] = 0;
 
 	debug("cs0_bnds = 0x%08x\n", im->ddr.csbnds[0].csbnds);
 	debug("cs0_config = 0x%08x\n", im->ddr.cs_config[0]);
diff --git a/board/freescale/mpc8360emds/mpc8360emds.c b/board/freescale/mpc8360emds/mpc8360emds.c
index 51d8035203..a0114f6c29 100644
--- a/board/freescale/mpc8360emds/mpc8360emds.c
+++ b/board/freescale/mpc8360emds/mpc8360emds.c
@@ -216,19 +216,15 @@ phys_size_t initdram(int board_type)
 int fixed_sdram(void)
 {
 	volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
-	u32 msize = 0;
-	u32 ddr_size;
-	u32 ddr_size_log2;
-
-	msize = CONFIG_SYS_DDR_SIZE;
-	for (ddr_size = msize << 20, ddr_size_log2 = 0;
-	     (ddr_size > 1); ddr_size = ddr_size >> 1, ddr_size_log2++) {
-		if (ddr_size & 1) {
-			return -1;
-		}
-	}
+	u32 msize = CONFIG_SYS_DDR_SIZE;
+	u32 ddr_size = msize << 20;
+	u32 ddr_size_log2 = __ilog2(ddr_size);
+	u32 half_ddr_size = ddr_size >> 1;
+
+	im->sysconf.ddrlaw[0].bar =
+		CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
 	im->sysconf.ddrlaw[0].ar =
-	    LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
+		LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
 #if (CONFIG_SYS_DDR_SIZE != 256)
 #warning Currenly any ddr size other than 256 is not supported
 #endif
@@ -246,11 +242,25 @@ int fixed_sdram(void)
 	im->ddr.sdram_interval = CONFIG_SYS_DDR_INTERVAL;
 	im->ddr.sdram_clk_cntl = CONFIG_SYS_DDR_CLK_CNTL;
 #else
-	im->ddr.csbnds[0].csbnds = 0x00000007;
-	im->ddr.csbnds[1].csbnds = 0x0008000f;
 
-	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CONFIG;
-	im->ddr.cs_config[1] = CONFIG_SYS_DDR_CONFIG;
+#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#warning Chip select bounds is only configurable in 16MB increments
+#endif
+	im->ddr.csbnds[0].csbnds =
+		((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_DDR_SDRAM_BASE + half_ddr_size - 1) >>
+				CSBNDS_EA_SHIFT) & CSBNDS_EA);
+	im->ddr.csbnds[1].csbnds =
+		(((CONFIG_SYS_DDR_SDRAM_BASE + half_ddr_size) >>
+				CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
+				CSBNDS_EA_SHIFT) & CSBNDS_EA);
+
+	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CS0_CONFIG;
+	im->ddr.cs_config[1] = CONFIG_SYS_DDR_CS1_CONFIG;
+
+	im->ddr.cs_config[2] = 0;
+	im->ddr.cs_config[3] = 0;
 
 	im->ddr.timing_cfg_1 = CONFIG_SYS_DDR_TIMING_1;
 	im->ddr.timing_cfg_2 = CONFIG_SYS_DDR_TIMING_2;