2 files changed, 101 insertions, 4 deletions

diff --git a/src/mainboard/google/urara/boardid.c b/src/mainboard/google/urara/boardid.c
index b6f3040..02cfa05 100644
--- a/src/mainboard/google/urara/boardid.c
+++ b/src/mainboard/google/urara/boardid.c
@@ -19,14 +19,83 @@
  * MA 02110-1301 USA
  */
 
+#include <stdlib.h>
+#include <string.h>
+
 #include <boardid.h>
-#include <soc/cpu.h>
+#include <cbfs_core.h>
+#include <console/console.h>
+
+#include "mainboard/google/urara/urara_boardid.h"
+
+/* Name of the CBFS file were the board ID string is read from. */
+#define CBFS_BOARD_ID_FILE_NAME "board_id"
+
+const struct bid_map {
+	const char *board_name;
+	uint8_t   board_id;
+} board_id_map[] = {
+	{"urara", URARA_BOARD_ID_BUB},
+	{"buranku", URARA_BOARD_ID_BURANKU},
+	{"derwent", URARA_BOARD_ID_DERWENT},
+	{"jaguar", URARA_BOARD_ID_JAGUAR},
+	{"kennet", URARA_BOARD_ID_KENNET},
+	{"space", URARA_BOARD_ID_SPACE},
+};
+
+static int cached_board_id = -1;
+
+static uint8_t retrieve_board_id(void)
+{
+	struct cbfs_file *board_id_file;
+	const char *board_id_file_name = CBFS_BOARD_ID_FILE_NAME;
+	char *file_contents;
+	int i;
+	unsigned length;
+
+	board_id_file = cbfs_get_file(CBFS_DEFAULT_MEDIA, board_id_file_name);
+	if (!board_id_file) {
+		printk(BIOS_WARNING,
+		       "board_id: failed to locate file '%s'\n",
+		       board_id_file_name);
+		return 0;
+	}
+
+	length = be32_to_cpu(board_id_file->len);
+
+	file_contents = cbfs_get_file_content(CBFS_DEFAULT_MEDIA,
+					      board_id_file_name,
+					      CBFS_TYPE_RAW, NULL);
+
+	if (!file_contents) {
+		printk(BIOS_WARNING, "board_id: failed to read file '%s'\n",
+		       board_id_file_name);
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(board_id_map); i++) {
+		const struct bid_map *entry = board_id_map + i;
+
+		if ((strlen(entry->board_name) == length) &&
+		    !strncmp(entry->board_name, file_contents, length)) {
+			printk(BIOS_INFO, "board_id: name '%s', ID %d\n",
+			       entry->board_name, entry->board_id);
+			return entry->board_id;
+		}
+	}
+
+	printk(BIOS_WARNING, "board_id: no match for board name '%.*s'\n",
+	       length, file_contents);
+	printk(BIOS_WARNING, "board_id: will use default board ID 0\n");
+
+	return 0;
+}
 
 uint8_t board_id(void)
 {
-	static int id;
+	if (cached_board_id == -1)
+		cached_board_id = retrieve_board_id();
 
-	id = IMG_PLATFORM_ID();
-	return id;
+	return cached_board_id;
 }
 
diff --git a/src/mainboard/google/urara/urara_boardid.h b/src/mainboard/google/urara/urara_boardid.h
new file mode 100644
index 0000000..e497e5a
--- /dev/null
+++ b/src/mainboard/google/urara/urara_boardid.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2015 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef __MAINBOARD_GOOGLE_URARA_URARA_BOARDID_H__
+#define __MAINBOARD_GOOGLE_URARA_URARA_BOARDID_H__
+
+/*
+ * List of URARA derivatives board ID defintions. They are stored in uint8_t
+ * across the code, using #defines here not to imply any specific size.
+ */
+#define URARA_BOARD_ID_BUB	0
+#define URARA_BOARD_ID_BURANKU	1
+#define URARA_BOARD_ID_DERWENT	2
+#define URARA_BOARD_ID_JAGUAR	3
+#define URARA_BOARD_ID_KENNET	4
+#define URARA_BOARD_ID_SPACE	5
+
+#endif