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-rw-r--r--src/mainboard/amd/bettong/Makefile.inc2
-rw-r--r--src/mainboard/amd/bettong/boardid.c48
2 files changed, 50 insertions, 0 deletions
diff --git a/src/mainboard/amd/bettong/Makefile.inc b/src/mainboard/amd/bettong/Makefile.inc
index 0361362d06..5358d926ea 100644
--- a/src/mainboard/amd/bettong/Makefile.inc
+++ b/src/mainboard/amd/bettong/Makefile.inc
@@ -15,9 +15,11 @@
romstage-y += BiosCallOuts.c
romstage-y += PlatformGnbPcie.c
+romstage-y += boardid.c
ramstage-y += BiosCallOuts.c
ramstage-y += PlatformGnbPcie.c
ifeq ($(CONFIG_HUDSON_IMC_FWM), y)
ramstage-y += fchec.c
endif
+ramstage-y += boardid.c
diff --git a/src/mainboard/amd/bettong/boardid.c b/src/mainboard/amd/bettong/boardid.c
new file mode 100644
index 0000000000..ae33328c1f
--- /dev/null
+++ b/src/mainboard/amd/bettong/boardid.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Advanced Micro Devices, Inc.
+ *
+ * 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 <stdint.h>
+#include <arch/io.h>
+#include <boardid.h>
+
+/**
+ *Bettong uses 3 GPIO(5-7) pins to identify board.
+ *The GPIO ports are mapped to MMIO space.
+ *The GPIO value and board version are mapped as follow:
+ *GPIO5 GPIO6 GPIO7 Version
+ * 0 0 0 A
+ * 0 0 1 B
+ * ......
+ * 1 1 1 H
+ */
+uint8_t board_id(void)
+{
+ void *gpiommioaddr;
+ u8 value = 0;
+ u8 boardrev = 0;
+ char boardid;
+
+ gpiommioaddr = (void *)0xfed80000ul + 0x1500;
+ value = read8(gpiommioaddr + (7 << 2) + 2); /* agpio7: board_id2 */
+ boardrev = value & 1;
+ value = read8(gpiommioaddr + (6 << 2) + 2); /* agpio6: board_id1 */
+ boardrev |= (value & 1) << 1;
+ value = read8(gpiommioaddr + (5 << 2) + 2); /* agpio5: board_id0 */
+ boardrev |= (value & 1) << 2;
+
+ boardid = 'A' + boardrev;
+
+ return boardid;
+}