mediatek/mt8173: Add RTC driver

BUG=none
TEST=emerge-oak coreboot
BRANCH=none

Change-Id: I03740ce1afeb8607891fff61110a40dd98b80bdc
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 9b0cc22cb9e2010e28e854d9984c11149a71ae0b
Original-Change-Id: I6d6482a75cc40ed6183ee115d5d866257afa24af
Original-Signed-off-by: Tianping Fang <tianping.fang@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292676
Original-Commit-Ready: Yidi Lin <yidi.lin@mediatek.com>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12616
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)

1 files changed, 184 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8173/include/soc/rtc.h b/src/soc/mediatek/mt8173/include/soc/rtc.h
new file mode 100644
index 0000000000..dd3546a13c
--- /dev/null
+++ b/src/soc/mediatek/mt8173/include/soc/rtc.h
@@ -0,0 +1,184 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2015 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.
+ */
+
+#ifndef SOC_MEDIATEK_MT8173_RTC_H
+#define SOC_MEDIATEK_MT8173_RTC_H
+
+#include <stdint.h>
+#include "mt6391.h"
+
+/*
+ * Default values for RTC initialization
+ * Year (YEA)        : 1970 ~ 2037
+ * Month (MTH)       : 1 ~ 12
+ * Day of Month (DOM): 1 ~ 31
+ */
+
+enum {
+	RTC_DEFAULT_YEA = 2010,
+	RTC_DEFAULT_MTH = 1,
+	RTC_DEFAULT_DOM = 1,
+	RTC_DEFAULT_DOW = 5
+};
+
+enum {
+	RTC_2SEC_REBOOT_ENABLE  = 1,
+	RTC_2SEC_MODE   = 2
+};
+
+/* RTC registers */
+enum {
+	RTC_BBPU = 0xE000,
+	RTC_IRQ_STA = 0xE002,
+	RTC_IRQ_EN = 0xE004,
+	RTC_CII_EN = 0xE006
+};
+
+enum {
+	RTC_TC_SEC = 0xE00A,
+	RTC_TC_MIN = 0xE00C,
+	RTC_TC_HOU = 0xE00E,
+	RTC_TC_DOM = 0xE010,
+	RTC_TC_DOW = 0xE012,
+	RTC_TC_MTH = 0xE014,
+	RTC_TC_YEA = 0xE016
+};
+
+enum {
+	RTC_AL_SEC = 0xE018,
+	RTC_AL_MIN = 0xE01A,
+	RTC_AL_HOU = 0xE01C,
+	RTC_AL_DOM = 0xE01E,
+	RTC_AL_DOW = 0xE020,
+	RTC_AL_MTH = 0xE022,
+	RTC_AL_YEA = 0xE024,
+	RTC_AL_MASK = 0xE008
+};
+
+enum {
+	RTC_OSC32CON = 0xE026,
+	RTC_CON = 0xE03E,
+	RTC_WRTGR = 0xE03C
+};
+
+enum {
+	RTC_POWERKEY1 = 0xE028,
+	RTC_POWERKEY2 = 0xE02A
+};
+
+enum {
+	RTC_PDN1 = 0xE02C,
+	RTC_PDN2 = 0xE02E,
+	RTC_SPAR0 = 0xE030,
+	RTC_SPAR1 = 0xE032,
+	RTC_PROT = 0xE036,
+	RTC_DIFF = 0xE038,
+	RTC_CALI = 0xE03A
+};
+
+enum {
+	RTC_OSC32CON_UNLOCK1 = 0x1A57,
+	RTC_OSC32CON_UNLOCK2 = 0x2B68
+};
+
+enum {
+	RTC_PROT_UNLOCK1 = 0x586A,
+	RTC_PROT_UNLOCK2 = 0x9136
+};
+
+enum {
+	RTC_BBPU_PWREN	= 1U << 0,
+	RTC_BBPU_BBPU	= 1U << 2,
+	RTC_BBPU_AUTO	= 1U << 3,
+	RTC_BBPU_CLRPKY	= 1U << 4,
+	RTC_BBPU_RELOAD	= 1U << 5,
+	RTC_BBPU_CBUSY	= 1U << 6,
+
+	RTC_CBUSY_TIMEOUT_US = 800
+};
+
+enum {
+	RTC_BBPU_KEY	= 0x43 << 8
+};
+
+enum {
+	RTC_IRQ_STA_AL	= 1U << 0,
+	RTC_IRQ_STA_TC	= 1U << 1,
+	RTC_IRQ_STA_LP	= 1U << 3
+};
+
+enum {
+	RTC_IRQ_EN_AL		= 1U << 0,
+	RTC_IRQ_EN_TC		= 1U << 1,
+	RTC_IRQ_EN_ONESHOT	= 1U << 2,
+	RTC_IRQ_EN_LP		= 1U << 3,
+	RTC_IRQ_EN_ONESHOT_AL	= RTC_IRQ_EN_ONESHOT | RTC_IRQ_EN_AL
+};
+
+enum {
+	RTC_OSC32CON_AMPEN	= 1U << 8,
+	RTC_OSC32CON_LNBUFEN	= 1U << 11
+};
+
+enum {
+	RTC_POWERKEY1_KEY	= 0xa357,
+	RTC_POWERKEY2_KEY	= 0x67d2
+};
+
+enum {
+	RTC_CON_LPEN		= 1U << 2,
+	RTC_CON_LPRST		= 1U << 3,
+	RTC_CON_CDBO		= 1U << 4,
+	RTC_CON_F32KOB		= 1U << 5,
+	RTC_CON_GPO		= 1U << 6,
+	RTC_CON_GOE		= 1U << 7,
+	RTC_CON_GSR		= 1U << 8,
+	RTC_CON_GSMT		= 1U << 9,
+	RTC_CON_GPEN		= 1U << 10,
+	RTC_CON_GPU		= 1U << 11,
+	RTC_CON_GE4		= 1U << 12,
+	RTC_CON_GE8		= 1U << 13,
+	RTC_CON_GPI		= 1U << 14,
+	RTC_CON_LPSTA_RAW	= 1U << 15
+};
+
+enum {
+	RTC_CALI_BBPU_2SEC_EN		= 1U << 8,
+	RTC_CALI_BBPU_2SEC_MODE_SHIFT	= 9,
+	RTC_CALI_BBPU_2SEC_MODE_MSK	= 3U << RTC_CALI_BBPU_2SEC_MODE_SHIFT,
+	RTC_CALI_BBPU_2SEC_STAT		= 1U << 11
+};
+
+enum {
+	RTC_SPAR0_32K_LESS	= 1U << 6
+};
+
+enum {
+	RTC_MIN_YEAR	= 1968,
+	RTC_BASE_YEAR	= 1900,
+	RTC_MIN_YEAR_OFFSET = RTC_MIN_YEAR - RTC_BASE_YEAR,
+
+	RTC_NUM_YEARS	= 128
+};
+
+enum {
+	RTC_STATE_REBOOT	= 0,
+	RTC_STATE_RECOVER	= 1,
+	RTC_STATE_INIT		= 2
+};
+
+void rtc_boot(void);
+
+#endif /* SOC_MEDIATEK_MT8173_RTC_H */