[PATCH] smegw01: Update DDR initialization

[PATCH] smegw01: Update DDR initialization

[Fabio Estevam]

Sync with the latest DDR initialization from Phytec, which
uses version 1.2 of NXP's i.MX7D DRAM Register Programming Aid
spreadsheet.

This updated DDR initialization fixes occasional system freeze.

Signed-off-by: Fabio Estevam <festevam@denx.de>
---
 board/storopack/smegw01/imximage.cfg | 55 ++++++++++++++++++++--------
 1 file changed, 39 insertions(+), 16 deletions(-)

diff --git a/board/storopack/smegw01/imximage.cfg b/board/storopack/smegw01/imximage.cfg
index c7fa06996cce..5ebeea56a772 100644
--- a/board/storopack/smegw01/imximage.cfg
+++ b/board/storopack/smegw01/imximage.cfg
@@ -44,57 +44,80 @@ BOOT_FROM	sd
 
 /* DDR initialization came from Phytec */
 DATA 4 0x30340004 0x4F400005
+/* Clear then set bit30 to ensure exit from DDR retention */
 DATA 4 0x30360388 0x40000000
 DATA 4 0x30360384 0x40000000
+
+/* deassert presetn */
 DATA 4 0x30391000 0x00000002
+
+/* DDR Controller Regs */
 DATA 4 0x307a0000 0x01040001
-DATA 4 0x307a01a0 0x80400003
-DATA 4 0x307a01a4 0x00100020
-DATA 4 0x307a01a8 0x80100004
-DATA 4 0x307a0064 0x0040002b
+DATA 4 0x307a0064 0x00400046
 DATA 4 0x307a0490 0x00000001
-DATA 4 0x307a00d0 0x00020083
 DATA 4 0x307a00d4 0x00690000
+DATA 4 0x307a00d0 0x00020083
 DATA 4 0x307a00dc 0x09300004
-DATA 4 0x307a00e0 0x04080000
+DATA 4 0x307a00e0 0x04480000
 DATA 4 0x307a00e4 0x00100004
 DATA 4 0x307a00f4 0x0000033f
-DATA 4 0x307a0100 0x090b1109
-DATA 4 0x307a0104 0x0007020d
+DATA 4 0x307a0100 0x090e110a
+DATA 4 0x307a0104 0x0007020e
 DATA 4 0x307a0108 0x03040407
 DATA 4 0x307a010c 0x00002006
-DATA 4 0x307a0110 0x04020205
+DATA 4 0x307a0110 0x04020304
 DATA 4 0x307a0114 0x03030202
-DATA 4 0x307a0120 0x00000802
+DATA 4 0x307a0120 0x00000803
 DATA 4 0x307a0180 0x00800020
-DATA 4 0x307a0184 0x02000100
 DATA 4 0x307a0190 0x02098204
 DATA 4 0x307a0194 0x00030303
-DATA 4 0x307a0200 0x00001f15
+DATA 4 0x307a01a0 0x80400003
+DATA 4 0x307a01a4 0x00100020
+DATA 4 0x307a01a8 0x80100004
+DATA 4 0x307a0200 0x0000001f
 DATA 4 0x307a0204 0x00080808
+DATA 4 0x307a020c 0x00000000
 DATA 4 0x307a0210 0x00000f0f
 DATA 4 0x307a0214 0x07070707
-DATA 4 0x307a0218 0x0f0f0707
+DATA 4 0x307a0218 0x0f070707
 DATA 4 0x307a0240 0x06000604
 DATA 4 0x307a0244 0x00000001
+
+/* deassert presetn */
 DATA 4 0x30391000 0x00000000
+
+/* PHY Controller Regs */
 DATA 4 0x30790000 0x17420f40
 DATA 4 0x30790004 0x10210100
 DATA 4 0x30790010 0x00060807
 DATA 4 0x307900b0 0x1010007e
 DATA 4 0x3079009c 0x00000d6e
-DATA 4 0x30790020 0x0a0a0a0a
-DATA 4 0x30790030 0x06060606
+/* write leveling values for each byte lane */
+DATA 4 0x3079006c 0x06090108
+/* write leveling resync cycle */
+DATA 4 0x30790078 0x00000001
+DATA 4 0x30790078 0x00000000
+DATA 4 0x30790030 0x08080808
+DATA 4 0x30790020 0x08080808
 DATA 4 0x30790050 0x01000010
 DATA 4 0x30790050 0x00000010
+DATA 4 0x30790018 0x0000000f
+
+/* start manual ZQ */
 DATA 4 0x307900c0 0x0e407304
 DATA 4 0x307900c0 0x0e447304
 DATA 4 0x307900c0 0x0e447306
-CHECK_BITS_SET 4 0x307900c4 0x1
 DATA 4 0x307900c0 0x0e447304
+
+CHECK_BITS_SET 4 0x307900c4 0x1
+
+/* end manual ZQ */
 DATA 4 0x307900c0 0x0e407304
+
+/* final init sequence */
 DATA 4 0x30384130 0x00000000
 DATA 4 0x30340020 0x00000178
 DATA 4 0x30384130 0x00000002
 DATA 4 0x30790018 0x0000000f
+
 CHECK_BITS_SET 4 0x307a0004 0x1
-- 
2.25.1

[PATCH] smegw01: Update DDR initialization

[sbabic]

> Sync with the latest DDR initialization from Phytec, which
> uses version 1.2 of NXP's i.MX7D DRAM Register Programming Aid
> spreadsheet.
> This updated DDR initialization fixes occasional system freeze.
> Signed-off-by: Fabio Estevam <festevam@denx.de>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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