[U-Boot] [PATCH] mxs: spl_mem_init: Align DDR2 init with FSL bootlets source

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam at freescale.com>

Currently the following kernel hang happens when loading a 2.6.35 kernel from
Freeescale on a mx28evk board:

RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Bus freq driver module loaded
IMX usb wakeup probe
usb h1 wakeup device is registered
mxs_cpu_init: cpufreq init finished
...

Loading the same kernel using the bootlets from the imx-bootlets-src-10.12.01 
package, the hang does not occur.

Comparing the DDR2 initialization from the bootlets code against the U-boot 
one, we can notice some mismatches, and after applying the same initialization 
into U-boot the 2.6.35 kernel can boot normally.

Also tested with 'mtest' command, which runs succesfully.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
 arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c |   87 ++++++++++++++---------------
 1 file changed, 43 insertions(+), 44 deletions(-)

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
index f8392f6..d80746f 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c
@@ -36,55 +36,54 @@ static uint32_t dram_vals[] = {
  * i.MX28 DDR2 at 200MHz
  */
 #if defined(CONFIG_MX28)
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000100, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00010101, 0x01010101,
-	0x000f0f01, 0x0f02020a, 0x00000000, 0x00010101,
-	0x00000100, 0x00000100, 0x00000000, 0x00000002,
-	0x01010000, 0x05060302, 0x06005003, 0x0a0000c8,
-	0x02009c40, 0x0000030c, 0x0036a609, 0x031a0612,
-	0x02030202, 0x00c8001c, 0x00000000, 0x00000000,
-	0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000100,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00010101, 0x01010101,
+	0x000f0f01, 0x0f02020a,	0x00000000, 0x00010101,
+	0x00000100, 0x00000100,	0x00000000, 0x00000002,
+	0x01010000, 0x07080403,	0x06005003, 0x0a0000c8,
+	0x02009c40, 0x0002030c,	0x0036a609, 0x031a0612,
+	0x02030202, 0x00c8001c,	0x00000000, 0x00000000,
+	0x00012100, 0xffff0303,	0x00012100, 0xffff0303,
 	0x00012100, 0xffff0303, 0x00012100, 0xffff0303,
-	0x00000003, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000612, 0x01000F02,
-	0x06120612, 0x00000200, 0x00020007, 0xf5014b27,
-	0xf5014b27, 0xf5014b27, 0xf5014b27, 0x07000300,
-	0x07000300, 0x07000300, 0x07000300, 0x00000006,
-	0x00000000, 0x00000000, 0x01000000, 0x01020408,
-	0x08040201, 0x000f1133, 0x00000000, 0x00001f04,
-	0x00001f04, 0x00001f04, 0x00001f04, 0x00001f04,
+	0x00000003, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000612, 0x01000f02,
+	0x06120612, 0x00000200,	0x00020007, 0xf4004a27,
+	0xf4004a27, 0xf4004a27,	0xf4004a27, 0x07000300,
+	0x07000300, 0x07400300,	0x07400300, 0x00000005,
+	0x00000000, 0x00000000,	0x01000000, 0x01020408,
+	0x08040201, 0x000f1133,	0x00000000, 0x00001f04,
+	0x00001f04, 0x00001f04,	0x00001f04, 0x00001f04,
 	0x00001f04, 0x00001f04, 0x00001f04, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
 	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00010000, 0x00020304,
-	0x00000004, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00000000, 0x00000000, 0x01010000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00010000, 0x00030404,
+	0x00000003, 0x00000000,	0x00000000, 0x00000000,
+	0x00000000, 0x00000000,	0x00000000, 0x01010000,
 	0x01000000, 0x03030000, 0x00010303, 0x01020202,
-	0x00000000, 0x02040303, 0x21002103, 0x00061200,
-	0x06120612, 0x04320432, 0x04320432, 0x00040004,
+	0x00000000, 0x02040303,	0x21002103, 0x00061200,
+	0x06120612, 0x04420442,	0x04420442, 0x00040004,
 	0x00040004, 0x00000000, 0x00000000, 0x00000000,
-	0x00000000, 0x00010001
-
+	0x00000000, 0xffffffff
 /*
  * i.MX23 DDR at 133MHz
  */
-- 
1.7.9.5