2 files changed, 104 insertions, 0 deletions
diff --git a/src/mainboard/google/brya/variants/vell/Makefile.inc b/src/mainboard/google/brya/variants/vell/Makefile.inc
index 58c4d79e02..20c6c3c22f 100644
--- a/src/mainboard/google/brya/variants/vell/Makefile.inc
+++ b/src/mainboard/google/brya/variants/vell/Makefile.inc
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
 bootblock-y += gpio.c
+romstage-y += memory.c
 romstage-y += gpio.c
 ramstage-y += gpio.c
diff --git a/src/mainboard/google/brya/variants/vell/memory.c b/src/mainboard/google/brya/variants/vell/memory.c
new file mode 100644
index 0000000000..afbe114f1c
--- /dev/null
+++ b/src/mainboard/google/brya/variants/vell/memory.c
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <gpio.h>
+#include <console/console.h>
+#include <soc/romstage.h>
+
+static const struct mb_cfg baseboard_memcfg = {
+	.type = MEM_TYPE_LP5X,
+
+	.rcomp = {
+		/* Baseboard uses only 100ohm Rcomp resistors */
+		.resistor = 100,
+
+		/* Baseboard Rcomp target values */
+		.targets = { 40, 36, 35, 35, 35 },
+	},
+
+	/* DQ byte map */
+	.lpx_dq_map = {
+		.ddr0 = {
+			.dq0 = {  4,  0,  1,  3,  7,  5,  6,  2, },
+			.dq1 = {  9, 13, 12,  8, 15, 10, 14, 11, },
+		},
+		.ddr1 = {
+			.dq0 = {  0,  2,  1,  3,  7,  5,  6,  4, },
+			.dq1 = { 10,  8, 11,  9, 13, 15, 14, 12, },
+		},
+		.ddr2 = {
+			.dq0 = {  3,  7,  2,  6,  4,  1,  5,  0, },
+			.dq1 = { 12, 14, 15, 13, 11,  8, 10,  9, },
+		},
+		.ddr3 = {
+			.dq0 = {  7,  6,  4,  5,  0,  3,  1,  2, },
+			.dq1 = {  9, 13,  8, 12, 15, 10, 14, 11, },
+		},
+		.ddr4 = {
+			.dq0 = {  7,  5,  4,  6,  2,  0,  1,  3, },
+			.dq1 = { 15, 14, 12, 13, 10,  9,  8, 11, },
+		},
+		.ddr5 = {
+			.dq0 = {  3,  7,  2,  6,  0,  4,  5,  1, },
+			.dq1 = {  9, 10, 11,  8, 12, 15, 13, 14, },
+		},
+		.ddr6 = {
+			.dq0 = {  1,  0,  3,  2,  7,  5,  4,  6, },
+			.dq1 = { 11,  8, 10,  9, 12, 14, 13, 15, },
+		},
+		.ddr7 = {
+			.dq0 = {  3,  2,  1,  0,  7,  5,  6,  4, },
+			.dq1 = {  8,  9, 10, 12, 14, 11, 13, 15, },
+		},
+	},
+
+	/* DQS CPU<>DRAM map */
+	.lpx_dqs_map = {
+		.ddr0 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr1 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr2 = { .dqs0 = 0, .dqs1 = 1 },
+		.ddr3 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr4 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr5 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr6 = { .dqs0 = 1, .dqs1 = 0 },
+		.ddr7 = { .dqs0 = 0, .dqs1 = 1 },
+	},
+
+	.ect = true, /* Enable Early Command Training */
+
+	.lp5x_config = {
+		.ccc_config = 0xff,
+	},
+};
+
+const struct mb_cfg *variant_memory_params(void)
+{
+	return &baseboard_memcfg;
+}
+
+int variant_memory_sku(void)
+{
+	/*
+	 * Memory configuration board straps
+	 * GPIO_MEM_CONFIG_0	GPP_E3
+	 * GPIO_MEM_CONFIG_1	GPP_E2
+	 * GPIO_MEM_CONFIG_2	GPP_E1
+	 * GPIO_MEM_CONFIG_3	GPP_E7
+	 */
+	gpio_t spd_gpios[] = {
+		GPP_E3,
+		GPP_E2,
+		GPP_E1,
+		GPP_E7,
+	};
+
+	return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
+}
+
+bool variant_is_half_populated(void)
+{
+	/* GPIO_MEM_CH_SEL GPP_E5 */
+	return gpio_get(GPP_E5);
+}