From: Dave Liu <r63238@freescale.com>
Date: Sat, 4 Aug 2007 05:37:39 +0000 (+0800)
Subject: mpc83xx: Correct the burst length for DDR2 with 32 bits
X-Git-Tag: v2025.01-rc5-pxa1908~22722^2~6^2~9^2~3
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-logo.png?a=commitdiff_plain;h=036575c544cf1b69654d8fb334bda69c6ff3da36;p=u-boot.git

mpc83xx: Correct the burst length for DDR2 with 32 bits

The burst length should be 4 for DDR2 with 32 bits bus

Signed-off-by: Dave Liu <daveliu@freescale.com>
---

diff --git a/cpu/mpc83xx/spd_sdram.c b/cpu/mpc83xx/spd_sdram.c
index 647813f68d..2c17cee31a 100644
--- a/cpu/mpc83xx/spd_sdram.c
+++ b/cpu/mpc83xx/spd_sdram.c
@@ -574,7 +574,10 @@ long int spd_sdram()
 
 	/* Check DIMM data bus width */
 	if (spd.dataw_lsb == 0x20) {
-		burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
+		if (spd.mem_type == SPD_MEMTYPE_DDR)
+			burstlen = 0x03; /* 32 bit data bus, burst len is 8 */
+		if (spd.mem_type == SPD_MEMTYPE_DDR2)
+			burstlen = 0x02; /* 32 bit data bus, burst len is 4 */
 		printf("\n   DDR DIMM: data bus width is 32 bit");
 	} else {
 		burstlen = 0x02; /* Others act as 64 bit bus, burst len is 4 */
@@ -730,8 +733,12 @@ long int spd_sdram()
 		sdram_cfg |= 0x10000000;
 
 	/* The DIMM is 32bit width */
-	if (spd.dataw_lsb == 0x20)
-		sdram_cfg |= 0x000C0000;
+	if (spd.dataw_lsb == 0x20) {
+		if (spd.mem_type == SPD_MEMTYPE_DDR)
+			sdram_cfg |= 0x000C0000;
+		if (spd.mem_type == SPD_MEMTYPE_DDR2)
+			sdram_cfg |= 0x00080000;
+	}
 
 	ddrc_ecc_enable = 0;