1 files changed, 66 insertions, 0 deletions
diff --git a/src/mainboard/google/cyan/variants/celes/spd_util.c b/src/mainboard/google/cyan/variants/celes/spd_util.c
new file mode 100644
index 0000000000..d6253368e9
--- /dev/null
+++ b/src/mainboard/google/cyan/variants/celes/spd_util.c
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google Inc.
+ * Copyright (C) 2015 Intel Corp.
+ * Copyright (C) 2017 Matt DeVillier
+ *
+ * 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 <console/console.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+#include <mainboard/google/cyan/spd/spd_util.h>
+
+/*
+ * Usage of RAMID straps
+ *
+ *  RAMID1 - Single/Dual channel configuration
+ *   0 - Dual channel, 1 - Single channel
+ *
+ *  Combination of RAMID3, RAMID2, RAMID0 - Index of SPD table
+ *   Index 0 - Samsung K4E8E304EE-EGCE 1600MHz 23nm
+ *   Index 1 - Samsung K4E8E324EB-EGCF 1866MHz 20nm
+ */
+
+uint8_t get_ramid(void)
+{
+	gpio_t spd_gpios[] = {
+		GP_SW_80,	/* SATA_GP3,RAMID0 */
+		GP_SE_02,	/* MF_PLT_CLK1, RAMID2 */
+		GP_SW_64,	/* I2C3_SDA RAMID3 */
+		GP_SW_67,	/* I2C3_SCL,RAMID1 */
+	};
+
+	return gpio_base2_value(spd_gpios, ARRAY_SIZE(spd_gpios));
+}
+
+int get_variant_spd_index(int ram_id, int *dual)
+{
+	int spd_index = ram_id & 0x7;
+
+	/* Determine if single or dual channel memory system */
+	/* RAMID3 is deterministic for celes */
+	*dual = ((ram_id > 3) & 0x1) ? 0 : 1;
+
+	/* Display the RAM type */
+	printk(BIOS_DEBUG, dual ? "4GiB " : "2GiB ");
+	switch (spd_index) {
+	case 0:
+		printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCE\n");
+		break;
+	case 1:
+		printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF\n");
+		break;
+	}
+
+	return spd_index;
+}