am33xx: Stop modifying certain EMIF4D registers

Based on the definitive guide to EMIF configuration[1] certain registers
that we have been modifying (and are documented registers) should be
left in their reset values rather than modified.  This has been tested
on AM335x GP EVM and Beaglebone White.

[1]: http://processors.wiki.ti.com/index.php/AM335x_EMIF_Configuration_tips
Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Cc: Javier Martinez Canillas <javier@dowhile0.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Tom Rini <trini@ti.com>
Tested-by: Matt Porter <matt.porter@linaro.org>

1 files changed, 6 insertions, 25 deletions

diff --git a/arch/arm/include/asm/arch-am33xx/ddr_defs.h b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
index f56d1e0..2278358 100644
--- a/arch/arm/include/asm/arch-am33xx/ddr_defs.h
+++ b/arch/arm/include/asm/arch-am33xx/ddr_defs.h
@@ -18,7 +18,6 @@
 #define VTP_CTRL_READY		(0x1 << 5)
 #define VTP_CTRL_ENABLE		(0x1 << 6)
 #define VTP_CTRL_START_EN	(0x1)
-#define PHY_DLL_LOCK_DIFF	0x0
 #define DDR_CKE_CTRL_NORMAL	0x1
 #define PHY_EN_DYN_PWRDN	(0x1 << 20)
 
@@ -29,7 +28,6 @@
 #define MT47H128M16RT25E_EMIF_TIM3		0x0000033F
 #define MT47H128M16RT25E_EMIF_SDCFG		0x41805332
 #define MT47H128M16RT25E_EMIF_SDREF		0x0000081a
-#define MT47H128M16RT25E_DLL_LOCK_DIFF		0x0
 #define MT47H128M16RT25E_RATIO			0x80
 #define MT47H128M16RT25E_INVERT_CLKOUT		0x00
 #define MT47H128M16RT25E_RD_DQS			0x12
@@ -38,7 +36,6 @@
 #define MT47H128M16RT25E_PHY_GATELVL		0x00
 #define MT47H128M16RT25E_PHY_WR_DATA		0x40
 #define MT47H128M16RT25E_PHY_FIFO_WE		0x80
-#define MT47H128M16RT25E_PHY_RANK0_DELAY		0x1
 #define MT47H128M16RT25E_IOCTRL_VALUE		0x18B
 
 /* Micron MT41J128M16JT-125 */
@@ -49,7 +46,6 @@
 #define MT41J128MJT125_EMIF_SDCFG		0x61C04AB2
 #define MT41J128MJT125_EMIF_SDREF		0x0000093B
 #define MT41J128MJT125_ZQ_CFG			0x50074BE4
-#define MT41J128MJT125_DLL_LOCK_DIFF		0x1
 #define MT41J128MJT125_RATIO			0x40
 #define MT41J128MJT125_INVERT_CLKOUT		0x1
 #define MT41J128MJT125_RD_DQS			0x3B
@@ -72,7 +68,6 @@
 #define MT41J256M8HX15E_EMIF_SDCFG		0x61C04B32
 #define MT41J256M8HX15E_EMIF_SDREF		0x0000093B
 #define MT41J256M8HX15E_ZQ_CFG			0x50074BE4
-#define MT41J256M8HX15E_DLL_LOCK_DIFF		0x1
 #define MT41J256M8HX15E_RATIO			0x40
 #define MT41J256M8HX15E_INVERT_CLKOUT		0x1
 #define MT41J256M8HX15E_RD_DQS			0x3B
@@ -89,7 +84,6 @@
 #define MT41K256M16HA125E_EMIF_SDCFG		0x61C05332
 #define MT41K256M16HA125E_EMIF_SDREF		0xC30
 #define MT41K256M16HA125E_ZQ_CFG		0x50074BE4
-#define MT41K256M16HA125E_DLL_LOCK_DIFF		0x1
 #define MT41K256M16HA125E_RATIO			0x80
 #define MT41K256M16HA125E_INVERT_CLKOUT		0x0
 #define MT41K256M16HA125E_RD_DQS		0x38
@@ -106,7 +100,6 @@
 #define MT41J512M8RH125_EMIF_SDCFG		0x61C04BB2
 #define MT41J512M8RH125_EMIF_SDREF		0x0000093B
 #define MT41J512M8RH125_ZQ_CFG			0x50074BE4
-#define MT41J512M8RH125_DLL_LOCK_DIFF		0x1
 #define MT41J512M8RH125_RATIO			0x80
 #define MT41J512M8RH125_INVERT_CLKOUT		0x0
 #define MT41J512M8RH125_RD_DQS			0x3B
@@ -123,7 +116,6 @@
 #define K4B2G1646EBIH9_EMIF_SDCFG		0x61C052B2
 #define K4B2G1646EBIH9_EMIF_SDREF		0x00000C30
 #define K4B2G1646EBIH9_ZQ_CFG			0x50074BE4
-#define K4B2G1646EBIH9_DLL_LOCK_DIFF		0x1
 #define K4B2G1646EBIH9_RATIO			0x80
 #define K4B2G1646EBIH9_INVERT_CLKOUT		0x0
 #define K4B2G1646EBIH9_RD_DQS			0x35
@@ -155,18 +147,15 @@ void config_ddr_phy(const struct emif_regs *regs, int nr);
 struct ddr_cmd_regs {
 	unsigned int resv0[7];
 	unsigned int cm0csratio;	/* offset 0x01C */
-	unsigned int resv1[2];
-	unsigned int cm0dldiff;		/* offset 0x028 */
+	unsigned int resv1[3];
 	unsigned int cm0iclkout;	/* offset 0x02C */
 	unsigned int resv2[8];
 	unsigned int cm1csratio;	/* offset 0x050 */
-	unsigned int resv3[2];
-	unsigned int cm1dldiff;		/* offset 0x05C */
+	unsigned int resv3[3];
 	unsigned int cm1iclkout;	/* offset 0x060 */
 	unsigned int resv4[8];
 	unsigned int cm2csratio;	/* offset 0x084 */
-	unsigned int resv5[2];
-	unsigned int cm2dldiff;		/* offset 0x090 */
+	unsigned int resv5[3];
 	unsigned int cm2iclkout;	/* offset 0x094 */
 	unsigned int resv6[3];
 };
@@ -203,24 +192,21 @@ struct ddr_regs {
 	unsigned int cm0configclk;	/* offset 0x010 */
 	unsigned int resv1[2];
 	unsigned int cm0csratio;	/* offset 0x01C */
-	unsigned int resv2[2];
-	unsigned int cm0dldiff;		/* offset 0x028 */
+	unsigned int resv2[3];
 	unsigned int cm0iclkout;	/* offset 0x02C */
 	unsigned int resv3[4];
 	unsigned int cm1config;		/* offset 0x040 */
 	unsigned int cm1configclk;	/* offset 0x044 */
 	unsigned int resv4[2];
 	unsigned int cm1csratio;	/* offset 0x050 */
-	unsigned int resv5[2];
-	unsigned int cm1dldiff;		/* offset 0x05C */
+	unsigned int resv5[3];
 	unsigned int cm1iclkout;	/* offset 0x060 */
 	unsigned int resv6[4];
 	unsigned int cm2config;		/* offset 0x074 */
 	unsigned int cm2configclk;	/* offset 0x078 */
 	unsigned int resv7[2];
 	unsigned int cm2csratio;	/* offset 0x084 */
-	unsigned int resv8[2];
-	unsigned int cm2dldiff;		/* offset 0x090 */
+	unsigned int resv8[3];
 	unsigned int cm2iclkout;	/* offset 0x094 */
 	unsigned int resv9[12];
 	unsigned int dt0rdsratio0;	/* offset 0x0C8 */
@@ -249,17 +235,14 @@ struct cmd_control {
 	unsigned long cmd0csratio;
 	unsigned long cmd0csforce;
 	unsigned long cmd0csdelay;
-	unsigned long cmd0dldiff;
 	unsigned long cmd0iclkout;
 	unsigned long cmd1csratio;
 	unsigned long cmd1csforce;
 	unsigned long cmd1csdelay;
-	unsigned long cmd1dldiff;
 	unsigned long cmd1iclkout;
 	unsigned long cmd2csratio;
 	unsigned long cmd2csforce;
 	unsigned long cmd2csdelay;
-	unsigned long cmd2dldiff;
 	unsigned long cmd2iclkout;
 };
 
@@ -273,8 +256,6 @@ struct ddr_data {
 	unsigned long datagiratio0;
 	unsigned long datafwsratio0;
 	unsigned long datawrsratio0;
-	unsigned long datauserank0delay;
-	unsigned long datadldiff0;
 };
 
 /**