2 files changed, 52 insertions, 0 deletions
diff --git a/src/mainboard/google/poppy/variants/rammus/Makefile.inc b/src/mainboard/google/poppy/variants/rammus/Makefile.inc
index 98464af429..edfaceaa32 100644
--- a/src/mainboard/google/poppy/variants/rammus/Makefile.inc
+++ b/src/mainboard/google/poppy/variants/rammus/Makefile.inc
@@ -1,2 +1,5 @@
 SPD_SOURCES = empty				# 0b0000
+
+romstage-y += memory.c
+
 ramstage-y += nhlt.c
diff --git a/src/mainboard/google/poppy/variants/rammus/memory.c b/src/mainboard/google/poppy/variants/rammus/memory.c
new file mode 100644
index 0000000000..92e66bd9fb
--- /dev/null
+++ b/src/mainboard/google/poppy/variants/rammus/memory.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <baseboard/variants.h>
+
+/* DQ byte map */
+static const u8 dq_map[][12] = {
+	{ 0x0F, 0xF0, 0x00, 0xF0, 0x0F, 0xF0,
+	  0x0F, 0x00, 0xFF, 0x00, 0xFF, 0x00 },
+	{ 0x33, 0xCC, 0x00, 0xCC, 0x33, 0xCC,
+	  0x33, 0x00, 0xFF, 0x00, 0xFF, 0x00 }
+};
+
+/* DQS CPU<>DRAM map */
+static const u8 dqs_map[][8] = {
+	{ 0, 1, 3, 2, 4, 5, 6, 7 },
+	{ 1, 0, 4, 5, 2, 3, 6, 7 },
+};
+
+/* Rcomp resistor */
+static const u16 rcomp_resistor[] = { 200, 81, 162 };
+
+/* Rcomp target */
+static const u16 rcomp_target[] = { 100, 40, 40, 23, 40 };
+
+void variant_memory_params(struct memory_params *p)
+{
+	p->type = MEMORY_LPDDR3;
+	p->dq_map = dq_map;
+	p->dq_map_size = sizeof(dq_map);
+	p->dqs_map = dqs_map;
+	p->dqs_map_size = sizeof(dqs_map);
+	p->rcomp_resistor = rcomp_resistor;
+	p->rcomp_resistor_size = sizeof(rcomp_resistor);
+	p->rcomp_target = rcomp_target;
+	p->rcomp_target_size = sizeof(rcomp_target);
+}