board/ls1021aqds: Add DDR4 support
LS1021AQDS has a variant with DDR4 slot. This patch adds a new defconfig
for this variant to enable DDR4 support. RAW timing parameters are not
added for DDR4. The board timing parameters are only tuned for single-
rank 1600 and 1800MT/s with Micron DIMM 9ASF51272AZ-2G1A1 due to DIMM
availability.
Signed-off-by: York Sun <yorksun@freescale.com>
CC: Alison Wang <alison.wang@freescale.com>
diff --git a/board/freescale/ls1021aqds/MAINTAINERS b/board/freescale/ls1021aqds/MAINTAINERS
index 021d82b..ccf4513 100644
--- a/board/freescale/ls1021aqds/MAINTAINERS
+++ b/board/freescale/ls1021aqds/MAINTAINERS
@@ -4,3 +4,4 @@
F: board/freescale/ls1021aqds/
F: include/configs/ls1021aqds.h
F: configs/ls1021aqds_nor_defconfig
+F: configs/ls1021aqds_ddr4_nor_defconfig
diff --git a/board/freescale/ls1021aqds/ddr.c b/board/freescale/ls1021aqds/ddr.c
index 679c654..5898e33 100644
--- a/board/freescale/ls1021aqds/ddr.c
+++ b/board/freescale/ls1021aqds/ddr.c
@@ -79,7 +79,6 @@
*/
popts->wrlvl_override = 1;
popts->wrlvl_sample = 0xf;
- popts->cswl_override = DDR_CSWL_CS0;
/*
* Rtt and Rtt_WR override
@@ -89,9 +88,17 @@
/* Enable ZQ calibration */
popts->zq_en = 1;
+#ifdef CONFIG_SYS_FSL_DDR4
+ popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_80ohm);
+ popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_80ohm) |
+ DDR_CDR2_VREF_OVRD(70); /* Vref = 70% */
+#else
+ popts->cswl_override = DDR_CSWL_CS0;
+
/* DHC_EN =1, ODT = 75 Ohm */
popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_75ohm);
popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_75ohm);
+#endif
}
#ifdef CONFIG_SYS_DDR_RAW_TIMING
diff --git a/board/freescale/ls1021aqds/ddr.h b/board/freescale/ls1021aqds/ddr.h
index 16d87cb..f819c99 100644
--- a/board/freescale/ls1021aqds/ddr.h
+++ b/board/freescale/ls1021aqds/ddr.h
@@ -30,6 +30,13 @@
* num| hi| rank| clk| wrlvl | wrlvl | wrlvl | cpo |wrdata|2T
* ranks| mhz| GB |adjst| start | ctl2 | ctl3 | |delay |
*/
+#ifdef CONFIG_SYS_FSL_DDR4
+ {2, 1666, 0, 4, 7, 0x0808090B, 0x0C0D0E0A,},
+ {2, 1900, 0, 4, 6, 0x08080A0C, 0x0D0E0F0A,},
+ {1, 1666, 0, 4, 8, 0x090A0B0B, 0x0C0D0E0C,},
+ {1, 1900, 0, 4, 9, 0x0A0B0C0B, 0x0D0E0F0D,},
+ {1, 2200, 0, 4, 10, 0x0B0C0D0C, 0x0E0F110E,},
+#elif defined(CONFIG_SYS_FSL_DDR3)
{1, 833, 1, 6, 8, 0x06060607, 0x08080807, 0x1f, 2, 0},
{1, 1350, 1, 6, 8, 0x0708080A, 0x0A0B0C09, 0x1f, 2, 0},
{1, 833, 2, 6, 8, 0x06060607, 0x08080807, 0x1f, 2, 0},
@@ -39,6 +46,9 @@
{2, 1350, 0, 6, 8, 0x0708080A, 0x0A0B0C09, 0x1f, 2, 0},
{2, 1666, 4, 4, 0xa, 0x0B08090C, 0x0B0E0D0A, 0x1f, 2, 0},
{2, 1666, 0, 4, 0xa, 0x0B08090C, 0x0B0E0D0A, 0x1f, 2, 0},
+#else
+#error DDR type not defined
+#endif
{}
};