Patch set updated for coreboot: AMD/Bettong: add function to read board version

[Zheng Bao]

Zheng Bao ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11732

-gerrit

commit e1404e338a49a4bd28a2e428d8a5c9cac7346017
Author: zbao 
Date:   Fri Nov 6 16:19:16 2015 +0800

AMD/Bettong: add function to read board version

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

Change-Id: I72df28043057d8c4ccc4a2e645011ca5379e9928
    Signed-off-by: WANG Siyuan 
    Signed-off-by: WANG Siyuan 
    Signed-off-by: Zheng Bao 
---
 src/mainboard/amd/bettong/Makefile.inc |  2 ++
 src/mainboard/amd/bettong/boardid.c    | 56 ++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/src/mainboard/amd/bettong/Makefile.inc b/src/mainboard/amd/bettong/Makefile.inc
index 0361362..5358d92 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 0000000..3cb40bc
--- /dev/null
+++ b/src/mainboard/amd/bettong/boardid.c
@@ -0,0 +1,56 @@
+/*
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+
+#include <stdint.h>
+#include <arch/io.h>
+#include <arch/acpi.h>
+#include <console/console.h>
+#include <reset.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)
+{
+	u32 gpiommioaddr;
+	u8  value = 0;
+	u8  boardrev = 0;
+	char boardid;
+
+	gpiommioaddr = 0xfed80000ul + 0x1500;
+	value = *(volatile u8 *) (gpiommioaddr + (7 << 2) + 2); //agpio7 //board_id2
+	boardrev = value & 1;
+	value = *(volatile u8 *) (gpiommioaddr + (6 << 2) + 2); //agpio6 //board_id1
+	boardrev |= (value & 1) << 1;
+	value = *(volatile u8 *) (gpiommioaddr + (5 << 2) + 2); //agpio5 //board_id0
+	boardrev |= (value & 1) << 2;
+
+	boardid = 'A' + boardrev;
+
+	return boardid;
+}