Import Mbed OS hard-float snapshot

targets/TARGET_Samsung/TARGET_SIDK_S1SBP6A/device/s1sbp6a_rtc.c

@@ -0,0 +1,93 @@
+/****************************************************************************
+ *
+ * Copyright 2020 Samsung Electronics All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the License.
+ *
+ ****************************************************************************/
+
+#include <stdbool.h>
+#include "s1sbp6a.h"
+#include "s1sbp6a_type.h"
+#include "s1sbp6a_rtc.h"
+#include "mbed_debug.h"
+
+static uint32_t grtc_load_delay = 1500;
+
+static void bp6a_rtc_unlock(bool unlock)
+{
+    BP_SYSCON->KA_ACCESS = unlock;
+}
+
+int bp6a_rtc_bcd2bin(uint8_t bcd)
+{
+    return ((bcd & 0xF0u) >> 4u) * 10 + (bcd & 0x0Fu);
+}
+
+uint32_t bp6a_rtc_bin2bcd(uint8_t bin)
+{
+    return ((bin / 10u) << 4u) + (bin % 10);
+}
+
+void bp6a_rtc_getdatetime(struct rtc_bcd_s *rtc)
+{
+    bp6a_rtc_unlock(true);
+    BP_RTC->CALENDAR_TIME_STAMP = 1;
+    _Wait(grtc_load_delay);
+
+    /* read bcd counters */
+    do {
+        rtc->sec = BP_RTC->BCD_R.SEC;
+        rtc->min = BP_RTC->BCD_R.MIN;
+        rtc->hour = BP_RTC->BCD_R.HOUR;
+        rtc->day = BP_RTC->BCD_R.DAY;
+        rtc->mon = (BP_RTC->BCD_R.MON >> 3) & 0x0F;
+        rtc->year = BP_RTC->BCD_R.YEAR & 0x3Fu;
+    } while (rtc->sec != BP_RTC->BCD_R.SEC);
+
+    bp6a_rtc_unlock(false);
+
+}
+
+void bp6a_rtc_setdatetime(struct rtc_bcd_s *rtc)
+{
+    bp6a_rtc_unlock(true);
+
+    /* update BCD counters */
+    BP_RTC->BCD_W.SEC = rtc->sec;
+    BP_RTC->BCD_W.MIN = rtc->min;
+    BP_RTC->BCD_W.HOUR = rtc->hour;
+    BP_RTC->BCD_W.DAY = rtc->day;
+    BP_RTC->BCD_W.MON = ((uint32_t)rtc->mon << 4);
+    BP_RTC->BCD_W.YEAR = rtc->year & 0x3Fu;
+    BP_RTC->LOAD_COUNT_SIG = 0x7F;
+    _Wait(grtc_load_delay);
+
+    bp6a_rtc_unlock(false);
+}
+
+void bp6a_set_rtc_delay(uint32_t delay)
+{
+    grtc_load_delay = delay;
+}
+
+void bp6a_rtc_init(void)
+{
+    bp6a_rtc_unlock(true);
+    BP_RTC->ALARM_ENABLE = 0;
+    BP_RTC->INT_ENABLE_CPU = 0;
+    BP_RTC->INT_CLEAR_CPU = 0;
+    BP_RTC->CALENDAR_MODE = 0x03;
+    bp6a_rtc_unlock(false);
+}