[coreboot-gerrit] Change in coreboot[master]: google/kukui: Add board id support

[Tristan Hsieh (Code Review)]

Tristan Hsieh has uploaded this change for review. ( https://review.coreboot.org/29062


Change subject: google/kukui: Add board id support
......................................................................

google/kukui: Add board id support

Get board id from AUXIN4 and ram code from AUXIN3.

BUG=b:80501386
BRANCH=none
TEST=AUXIN4 is 0.074v and AUXIN3 is 0.212v on P0.
     AUXIN4 is 0.212v and AUXIN3 is 0.212v on P1.

Change-Id: I50533e851d2fae66ae8c5e4e1aa36708d9058e94
Signed-off-by: Tristan Shieh <tristan.shieh at mediatek.com>
---
M src/mainboard/google/kukui/Makefile.inc
A src/mainboard/google/kukui/boardid.c
2 files changed, 63 insertions(+), 0 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/29062/1

diff --git a/src/mainboard/google/kukui/Makefile.inc b/src/mainboard/google/kukui/Makefile.inc
index aa6bf11..a98541a 100644
--- a/src/mainboard/google/kukui/Makefile.inc
+++ b/src/mainboard/google/kukui/Makefile.inc
@@ -1,3 +1,4 @@
+bootblock-y += boardid.c
 bootblock-y += bootblock.c
 bootblock-y += chromeos.c
 bootblock-y += memlayout.ld
@@ -6,10 +7,12 @@
 verstage-y += chromeos.c
 verstage-y += memlayout.ld
 
+romstage-y += boardid.c
 romstage-y += chromeos.c
 romstage-y += memlayout.ld
 romstage-y += romstage.c
 
+ramstage-y += boardid.c
 ramstage-y += chromeos.c
 ramstage-y += mainboard.c
 ramstage-y += memlayout.ld
diff --git a/src/mainboard/google/kukui/boardid.c b/src/mainboard/google/kukui/boardid.c
new file mode 100644
index 0000000..82d4915
--- /dev/null
+++ b/src/mainboard/google/kukui/boardid.c
@@ -0,0 +1,60 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek 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 <boardid.h>
+#include <soc/auxadc.h>
+
+static uint32_t get_board_id(void)
+{
+	int auxin4 = auxadc_get_voltage(4);
+
+	if ((auxin4 > 64000) && (auxin4 < 84000)) /* 74mv +/- 10mv */
+		return 0;
+
+	if ((auxin4 > 202000) && (auxin4 < 222000)) /* 212mv +/- 10mv */
+		return 1;
+
+	return BOARD_ID_UNKNOWN;
+}
+
+uint32_t board_id(void)
+{
+	static uint32_t cached_board_id = BOARD_ID_UNKNOWN;
+
+	if (cached_board_id == BOARD_ID_UNKNOWN)
+		cached_board_id = get_board_id();
+
+	return cached_board_id;
+}
+
+static uint32_t get_ram_code(void)
+{
+	int auxin3 = auxadc_get_voltage(3);
+
+	if ((auxin3 > 202000) && (auxin3 < 222000)) /* 212mv +/- 10mv */
+		return 0;
+
+	return BOARD_ID_UNKNOWN;
+}
+
+uint32_t ram_code(void)
+{
+	static uint32_t cached_ram_code = BOARD_ID_UNKNOWN;
+
+	if (cached_ram_code == BOARD_ID_UNKNOWN)
+		cached_ram_code = get_ram_code();
+
+	return cached_ram_code;
+}

-- 
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I50533e851d2fae66ae8c5e4e1aa36708d9058e94
Gerrit-Change-Number: 29062
Gerrit-PatchSet: 1
Gerrit-Owner: Tristan Hsieh <tristan.shieh at mediatek.com>
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