google/terra: add new board as variant of cyan baseboard

Add support for google/terra (Asus Chromebook C202SA/C300SA) as
a variant of the cyan Braswell baseboard.

- Add board-specific code as the new terra variant
- Add code to the baseboard to handle terra's unique thermal management
- Add new shared SPD files to baseboard

Sourced from Chromium branch firmware-terra-7287.154.B,
commit 153f08a: Revert "Revert "soc/intel/braswell: Populate NVS SCC BAR1""

Change-Id: Ib2682eda15a989f2ec20c78317561f5b6a97483a
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/21570
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/src/mainboard/google/cyan/variants/terra/spd_util.c b/src/mainboard/google/cyan/variants/terra/spd_util.c
new file mode 100644
index 0000000000..7b4629d05a
--- /dev/null
+++ b/src/mainboard/google/cyan/variants/terra/spd_util.c
@@ -0,0 +1,60 @@
+/*
+ * 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 <mainboard/google/cyan/spd/spd_util.h>
+
+/*
+ * RAMID3 -1: Dual channel SKU, 0: Single channel SKU
+ * 0b0010 - 2GiB total - 1 x 2GiB Micron  EDF8132A3MA-GD-F-R	1600MHz
+ * 0b0011 - 2GiB total - 1 x 2GiB Micron  MT52L256M32D1PF-107WT	1866MHz
+ * 0b0100 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCE	1600MHz
+ * 0b0101 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF	1866MHz
+ *
+ * 0b1010 - 4GiB total - 2 x 2GiB Micron  EDF8132A3MA-GD-F-R	1600MHz
+ * 0b1011 - 4GiB total - 2 x 2GiB Micron  MT52L256M32D1PF-107WT	1866MHz
+ * 0b1100 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCE	1600MHz
+ * 0b1101 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF	1866MHz
+ */
+
+int get_variant_spd_index(int ram_id, int *dual)
+{
+	int spd_index = ram_id & 0x03;
+
+	/* Determine if single or dual channel memory system */
+	/* RAMID3 is deterministic for terra */
+	*dual = ((ram_id > 3) & 0x1) ? 1 : 0;
+
+	/* Display the RAM type */
+	printk(BIOS_DEBUG, dual ? "4GiB " : "2GiB ");
+	switch (spd_index) {
+	case 0:
+		printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCE 1600MHz\n");
+		break;
+	case 1:
+		printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF 1866MHz\n");
+		break;
+	case 2:
+		printk(BIOS_DEBUG, "Micron EDF8132A3MA-GD-F-R 1600MHz\n");
+		break;
+	case 3:
+		printk(BIOS_DEBUG, "Micron MT52L256M32D1PF-107WT 1866MHz\n");
+		break;
+	}
+
+	return spd_index;
+}