[U-Boot-Users] [PATCH] ads5121e DRAM init (fwd)

[Wolfgang Denk]

Dear Chris,

as discussed, I have this patch for the ads5121e DRAM init code
sitting in my queue; you mentioned you had a more recent / better
patch available. I would appreciate if you could submit it soon to
this mailing list so we can include it as part of the upcoming next
U-Boot release.

Thanks in advance.

------- Forwarded Message

Date:    Wed, 02 Apr 2008 20:34:14 +0200
From:    Kenneth Johansson <kenneth at southpole.se>
To:      u-boot-users at lists.sourceforge.net
Subject: [U-Boot-Users] [PATCH] ads5121e DRAM init


    Do the DRAM init according to micron MT47H64M8B6-37E
    documentation.
    
    Signed-off-by: Kenneth Johansson <kenneth at southpole.se>

diff --git a/board/ads5121/ads5121.c b/board/ads5121/ads5121.c
index 8629b03..606cc6b 100644
--- a/board/ads5121/ads5121.c
+++ b/board/ads5121/ads5121.c
@@ -158,26 +158,18 @@ long int fixed_sdram (void)
 		im->mddrc.ddr_command = CFG_MICRON_NOP;
 
 	im->mddrc.ddr_command = CFG_MICRON_PCHG_ALL;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
-	im->mddrc.ddr_command = CFG_MICRON_RFSH;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
-	im->mddrc.ddr_command = CFG_MICRON_RFSH;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
-	im->mddrc.ddr_command = CFG_MICRON_INIT_DEV_OP;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
-	im->mddrc.ddr_command = CFG_MICRON_EM2;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
-	im->mddrc.ddr_command = CFG_MICRON_PCHG_ALL;
-	im->mddrc.ddr_command = CFG_MICRON_EM2;
-	im->mddrc.ddr_command = CFG_MICRON_EM3;
-	im->mddrc.ddr_command = CFG_MICRON_EN_DLL;
-	im->mddrc.ddr_command = CFG_MICRON_INIT_DEV_OP;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_EM2;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_EM3;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_EM;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_MR_DLL_RESET;
+                                
 	im->mddrc.ddr_command = CFG_MICRON_PCHG_ALL;
 	im->mddrc.ddr_command = CFG_MICRON_RFSH;
-	im->mddrc.ddr_command = CFG_MICRON_INIT_DEV_OP;
-	im->mddrc.ddr_command = CFG_MICRON_OCD_DEFAULT;
-	im->mddrc.ddr_command = CFG_MICRON_PCHG_ALL;
-	im->mddrc.ddr_command = CFG_MICRON_NOP;
+	im->mddrc.ddr_command = CFG_MICRON_RFSH;
+
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_MR;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_EM_OCD;
+	im->mddrc.ddr_command = CFG_MICRON_DDR2_LM_EM_EXIT;
 
 	/* Start MDDRC */
 	im->mddrc.ddr_time_config0 = CFG_MDDRC_TIME_CFG0_RUN;
diff --git a/include/configs/ads5121.h b/include/configs/ads5121.h
index c147424..83781c6 100644
--- a/include/configs/ads5121.h
+++ b/include/configs/ads5121.h
@@ -117,14 +117,22 @@
 #define CFG_MDDRC_TIME_CFG1	0x54EC1168
 #define CFG_MDDRC_TIME_CFG2	0x35210864
 
-#define CFG_MICRON_NOP		0x01380000
-#define CFG_MICRON_PCHG_ALL	0x01100400
-#define CFG_MICRON_EM2		0x01020000
-#define CFG_MICRON_EM3		0x01030000
-#define CFG_MICRON_EN_DLL	0x01010000
-#define CFG_MICRON_RFSH		0x01080000
-#define CFG_MICRON_INIT_DEV_OP	0x01000432
-#define CFG_MICRON_OCD_DEFAULT	0x01010780
+/* DRAM commands */
+#define CFG_MICRON_NOP			0x01380000
+#define CFG_MICRON_PCHG_ALL		0x01100400
+#define CFG_MICRON_RFSH			0x01080000
+
+/* DDR2 specific commands */
+#define CFG_MICRON_DDR2_LM_MR_DLL_RESET	0x01000100	/* reset DLL   
     */
+#define CFG_MICRON_DDR2_LM_MR		0x01000432	/* burst lenght 4   */
+							/* CAS 3            */
+							/* Write recovery 3 */
+#define CFG_MICRON_DDR2_LM_EM_OCD	0x01010780	/* OCD default      */
+							/* DQS# enable      */
+#define CFG_MICRON_DDR2_LM_EM_EXIT	0x01010400	/* DQS# enable      */
+#define CFG_MICRON_DDR2_LM_EM		0x01010000
+#define CFG_MICRON_DDR2_LM_EM2		0x01020000
+#define CFG_MICRON_DDR2_LM_EM3		0x01030000
 
 /* DDR Priority Manager Configuration */
 #define CFG_MDDRCGRP_PM_CFG1	0x000777AA



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------- End of Forwarded Message

Best regards,

Wolfgang Denk

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