keystone2: ddr: add DDR3 PHY configs updated for PG 2.0

Add DDR3 PHY configs updated for PG 2.0
Also add DDR3A PHY reset before init for PG2.0 SoCs.

Acked-by: Murali Karicheri <m-maricheri2@ti.com>
Signed-off-by: Hao Zhang <hzhang@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>

arch/arm/cpu/armv7/keystone/ddr3.c

@@ -8,6 +8,7 @@
  */
 
 #include <asm/io.h>
+#include <common.h>
 #include <asm/arch/ddr3.h>
 
 void ddr3_init_ddrphy(u32 base, struct ddr3_phy_config *phy_cfg)
@@ -67,3 +68,21 @@ void ddr3_init_ddremif(u32 base, struct ddr3_emif_config *emif_cfg)
 	__raw_writel(emif_cfg->zqcfg,  base + KS2_DDR3_ZQCFG_OFFSET);
 	__raw_writel(emif_cfg->sdrfc,  base + KS2_DDR3_SDRFC_OFFSET);
 }
+
+void ddr3_reset_ddrphy(void)
+{
+	u32 tmp;
+
+	/* Assert DDR3A  PHY reset */
+	tmp = readl(K2HK_DDR3APLLCTL1);
+	tmp |= KS2_DDR3_PLLCTRL_PHY_RESET;
+	writel(tmp, K2HK_DDR3APLLCTL1);
+
+	/* wait 10us to catch the reset */
+	udelay(10);
+
+	/* Release DDR3A PHY reset */
+	tmp = readl(K2HK_DDR3APLLCTL1);
+	tmp &= ~KS2_DDR3_PLLCTRL_PHY_RESET;
+	__raw_writel(tmp, K2HK_DDR3APLLCTL1);
+}

arch/arm/include/asm/arch-keystone/ddr3.h

@@ -49,6 +49,7 @@ struct ddr3_emif_config {
 };
 
 void ddr3_init(void);
+void ddr3_reset_ddrphy(void);
 void ddr3_init_ddrphy(u32 base, struct ddr3_phy_config *phy_cfg);
 void ddr3_init_ddremif(u32 base, struct ddr3_emif_config *emif_cfg);
 

arch/arm/include/asm/arch-keystone/hardware.h

@@ -80,6 +80,8 @@ typedef volatile unsigned int   *dv_reg_p;
 #define KS2_DDR3_PMCTL_OFFSET           0x38
 #define KS2_DDR3_ZQCFG_OFFSET           0xC8
 
+#define KS2_DDR3_PLLCTRL_PHY_RESET	0x80000000
+
 #define KS2_UART0_BASE                	0x02530c00
 #define KS2_UART1_BASE                	0x02531000
 

board/ti/k2hk_evm/ddr3.c

@@ -188,6 +188,61 @@ static struct ddr3_phy_config ddr3phy_1333_64 = {
 	.pir_v2		= 0x0000FF81ul,
 };
 /******************************************************/
+
+/* DDR PHY Configs Updated for PG 2.0
+ * zq0,1,2cr1 are updated for PG 2.0 specific configs *_pg2 */
+static struct ddr3_phy_config ddr3phy_1600_64A_pg2 = {
+	.pllcr          = 0x0001C000ul,
+	.pgcr1_mask     = (IODDRM_MASK | ZCKSEL_MASK),
+	.pgcr1_val      = ((1 << 2) | (1 << 7) | (1 << 23)),
+	.ptr0           = 0x42C21590ul,
+	.ptr1           = 0xD05612C0ul,
+	.ptr2           = 0, /* not set in gel */
+	.ptr3           = 0x0D861A80ul,
+	.ptr4           = 0x0C827100ul,
+	.dcr_mask       = (PDQ_MASK | MPRDQ_MASK | BYTEMASK_MASK),
+	.dcr_val        = ((1 << 10)),
+	.dtpr0          = 0xA19DBB66ul,
+	.dtpr1          = 0x32868300ul,
+	.dtpr2          = 0x50035200ul,
+	.mr0            = 0x00001C70ul,
+	.mr1            = 0x00000006ul,
+	.mr2            = 0x00000018ul,
+	.dtcr           = 0x730035C7ul,
+	.pgcr2          = 0x00F07A12ul,
+	.zq0cr1         = 0x0001005Dul,
+	.zq1cr1         = 0x0001005Bul,
+	.zq2cr1         = 0x0001005Bul,
+	.pir_v1         = 0x00000033ul,
+	.pir_v2         = 0x0000FF81ul,
+};
+
+static struct ddr3_phy_config ddr3phy_1333_64A_pg2 = {
+	.pllcr          = 0x0005C000ul,
+	.pgcr1_mask     = (IODDRM_MASK | ZCKSEL_MASK),
+	.pgcr1_val      = ((1 << 2) | (1 << 7) | (1 << 23)),
+	.ptr0           = 0x42C21590ul,
+	.ptr1           = 0xD05612C0ul,
+	.ptr2           = 0, /* not set in gel */
+	.ptr3           = 0x0B4515C2ul,
+	.ptr4           = 0x0A6E08B4ul,
+	.dcr_mask       = (PDQ_MASK | MPRDQ_MASK | BYTEMASK_MASK),
+	.dcr_val        = ((1 << 10)),
+	.dtpr0          = 0x8558AA55ul,
+	.dtpr1          = 0x32857280ul,
+	.dtpr2          = 0x5002C200ul,
+	.mr0            = 0x00001A60ul,
+	.mr1            = 0x00000006ul,
+	.mr2            = 0x00000010ul,
+	.dtcr           = 0x710035C7ul,
+	.pgcr2          = 0x00F065B8ul,
+	.zq0cr1         = 0x0001005Dul,
+	.zq1cr1         = 0x0001005Bul,
+	.zq2cr1         = 0x0001005Bul,
+	.pir_v1         = 0x00000033ul,
+	.pir_v2         = 0x0000FF81ul,
+};
+
 int get_dimm_params(char *dimm_name)
 {
 	u8 spd_params[256];
@@ -240,7 +295,18 @@ void ddr3_init(void)
 	if (!strcmp(dimm_name, "18KSF1G72HZ-1G6E2 ")) {
 		init_pll(&ddr3a_400);
 		if (cpu_revision() > 0) {
-			ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC, &ddr3phy_1600_64A);
+			if (cpu_revision() > 1) {
+				/* PG 2.0 */
+				/* Reset DDR3A PHY after PLL enabled */
+				ddr3_reset_ddrphy();
+				ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC,
+						 &ddr3phy_1600_64A_pg2);
+			} else {
+				/* PG 1.1 */
+				ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC,
+						 &ddr3phy_1600_64A);
+			}
+
 			ddr3_init_ddremif(K2HK_DDR3A_EMIF_CTRL_BASE,
 					  &ddr3_1600_64);
 			printf("DRAM:  Capacity 8 GiB (includes reported below)\n");
@@ -253,7 +319,17 @@ void ddr3_init(void)
 	} else if (!strcmp(dimm_name, "SQR-SD3T-2G1333SED")) {
 		init_pll(&ddr3a_333);
 		if (cpu_revision() > 0) {
-			ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC, &ddr3phy_1333_64A);
+			if (cpu_revision() > 1) {
+				/* PG 2.0 */
+				/* Reset DDR3A PHY after PLL enabled */
+				ddr3_reset_ddrphy();
+				ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC,
+						 &ddr3phy_1333_64A_pg2);
+			} else {
+				/* PG 1.1 */
+				ddr3_init_ddrphy(K2HK_DDR3A_DDRPHYC,
+						 &ddr3phy_1333_64A);
+			}
 			ddr3_init_ddremif(K2HK_DDR3A_EMIF_CTRL_BASE,
 					  &ddr3_1333_64);
 		} else {