[U-Boot] [PATCH v1 1/7] driver/ddr/fsl: Update DDR4 RTT values

[York Sun]

DDR4 has different RTT value and code according to JEDEC spec. Update
the macros and options .

Signed-off-by: York Sun <yorksun at freescale.com>
---

 drivers/ddr/fsl/options.c |  237 ++++++++++++++++++++++++++++++++++++++++++++-
 include/fsl_ddr_sdram.h   |    9 ++
 2 files changed, 244 insertions(+), 2 deletions(-)

diff --git a/drivers/ddr/fsl/options.c b/drivers/ddr/fsl/options.c
index 3c09c64..791d644 100644
--- a/drivers/ddr/fsl/options.c
+++ b/drivers/ddr/fsl/options.c
@@ -29,7 +29,240 @@ struct dynamic_odt {
 	unsigned int odt_rtt_wr;
 };
 
-#if defined(CONFIG_SYS_FSL_DDR3) || defined(CONFIG_SYS_FSL_DDR4)
+#ifdef CONFIG_SYS_FSL_DDR4
+/* Quad rank is not verified yet due availability.
+ * Replacing 20 OHM with 34 OHM since DDR4 doesn't have 20 OHM option
+ */
+static const struct dynamic_odt single_Q[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS_AND_OTHER_DIMM,
+		DDR4_RTT_34_OHM,	/* unverified */
+		DDR4_RTT_120_OHM
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_NEVER,
+		DDR4_RTT_OFF,
+		DDR4_RTT_120_OHM
+	},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS_AND_OTHER_DIMM,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_120_OHM
+	},
+	{	/* cs3 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_NEVER,	/* tied high */
+		DDR4_RTT_OFF,
+		DDR4_RTT_120_OHM
+	}
+};
+
+static const struct dynamic_odt single_D[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_NEVER,
+		DDR4_RTT_OFF,
+		DDR4_RTT_OFF
+	},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0}
+};
+
+static const struct dynamic_odt single_S[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0},
+};
+
+static const struct dynamic_odt dual_DD[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_OTHER_DIMM,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs3 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_OTHER_DIMM,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_OFF
+	}
+};
+
+static const struct dynamic_odt dual_DS[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_OTHER_DIMM,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs2 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_120_OHM
+	},
+	{0, 0, 0, 0}
+};
+static const struct dynamic_odt dual_SD[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_120_OHM
+	},
+	{0, 0, 0, 0},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs3 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_OTHER_DIMM,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_OFF
+	}
+};
+
+static const struct dynamic_odt dual_SS[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_120_OHM
+	},
+	{0, 0, 0, 0},
+	{	/* cs2 */
+		FSL_DDR_ODT_OTHER_DIMM,
+		FSL_DDR_ODT_ALL,
+		DDR4_RTT_34_OHM,
+		DDR4_RTT_120_OHM
+	},
+	{0, 0, 0, 0}
+};
+
+static const struct dynamic_odt dual_D0[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_NEVER,
+		DDR4_RTT_OFF,
+		DDR4_RTT_OFF
+	},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0}
+};
+
+static const struct dynamic_odt dual_0D[4] = {
+	{0, 0, 0, 0},
+	{0, 0, 0, 0},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_SAME_DIMM,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs3 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_NEVER,
+		DDR4_RTT_OFF,
+		DDR4_RTT_OFF
+	}
+};
+
+static const struct dynamic_odt dual_S0[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0},
+	{0, 0, 0, 0}
+
+};
+
+static const struct dynamic_odt dual_0S[4] = {
+	{0, 0, 0, 0},
+	{0, 0, 0, 0},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_40_OHM,
+		DDR4_RTT_OFF
+	},
+	{0, 0, 0, 0}
+
+};
+
+static const struct dynamic_odt odt_unknown[4] = {
+	{	/* cs0 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs1 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs2 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	},
+	{	/* cs3 */
+		FSL_DDR_ODT_NEVER,
+		FSL_DDR_ODT_CS,
+		DDR4_RTT_120_OHM,
+		DDR4_RTT_OFF
+	}
+};
+#elif defined(CONFIG_SYS_FSL_DDR3)
 static const struct dynamic_odt single_Q[4] = {
 	{	/* cs0 */
 		FSL_DDR_ODT_NEVER,
@@ -259,7 +492,7 @@ static const struct dynamic_odt odt_unknown[4] = {
 		DDR3_RTT_OFF
 	}
 };
-#else	/* CONFIG_SYS_FSL_DDR3 || CONFIG_SYS_FSL_DDR4 */
+#else	/* CONFIG_SYS_FSL_DDR3 */
 static const struct dynamic_odt single_Q[4] = {
 	{0, 0, 0, 0},
 	{0, 0, 0, 0},
diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h
index c79fce0..4b022d4 100644
--- a/include/fsl_ddr_sdram.h
+++ b/include/fsl_ddr_sdram.h
@@ -33,6 +33,15 @@
 #define DDR3_RTT_20_OHM		4 /* RTT_Nom = RZQ/12 */
 #define DDR3_RTT_30_OHM		5 /* RTT_Nom = RZQ/8 */
 
+#define DDR4_RTT_OFF		0
+#define DDR4_RTT_60_OHM		1	/* RZQ/4 */
+#define DDR4_RTT_120_OHM	2	/* RZQ/2 */
+#define DDR4_RTT_40_OHM		3	/* RZQ/6 */
+#define DDR4_RTT_240_OHM	4	/* RZQ/1 */
+#define DDR4_RTT_48_OHM		5	/* RZQ/5 */
+#define DDR4_RTT_80_OHM		6	/* RZQ/3 */
+#define DDR4_RTT_34_OHM		7	/* RZQ/7 */
+
 #define DDR2_RTT_OFF		0
 #define DDR2_RTT_75_OHM		1
 #define DDR2_RTT_150_OHM	2
-- 
1.7.9.5