purism/librem13v2: convert to variant setup

Convert the Purism Librem13v2 board to a variant setup,
in preparation of adding the librem15v3 as a new variant.
The 13v2 and 15v3 are nearly identical, so this minimizes new
code to add support for the latter.

Change-Id: I5d648cdb8f63c03de5474253203b3d0853673294
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/22047
Reviewed-by: Youness Alaoui <snifikino@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/src/mainboard/purism/librem_skl/mainboard.c b/src/mainboard/purism/librem_skl/mainboard.c
new file mode 100644
index 0000000000..37a7a01132
--- /dev/null
+++ b/src/mainboard/purism/librem_skl/mainboard.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Purism SPC
+ *
+ * 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 <smbios.h>
+#include <string.h>
+#include <cbfs.h>
+
+#define MAX_SERIAL_LENGTH 0x100
+
+const char *smbios_mainboard_serial_number(void)
+{
+	static char serial_number[MAX_SERIAL_LENGTH + 1] = {0};
+	struct cbfsf file;
+
+	if (serial_number[0] != 0)
+		return serial_number;
+
+	if (cbfs_boot_locate(&file, "serial_number", NULL) == 0) {
+		struct region_device cbfs_region;
+		size_t serial_len;
+
+		cbfs_file_data(&cbfs_region, &file);
+
+		serial_len = region_device_sz(&cbfs_region);
+		if (serial_len <= MAX_SERIAL_LENGTH) {
+			if (rdev_readat(&cbfs_region, serial_number, 0,
+					serial_len) == serial_len) {
+				serial_number[serial_len] = 0;
+				return serial_number;
+			}
+		}
+	}
+
+	strncpy(serial_number, CONFIG_MAINBOARD_SERIAL_NUMBER, MAX_SERIAL_LENGTH);
+
+	return serial_number;
+}