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authorMarc Jones <marc.jones@se-eng.com>2014-12-29 21:31:44 -0700
committerMarc Jones <marc.jones@se-eng.com>2014-12-30 19:28:27 +0100
commit3cc685fd3e851b1bd2b77690ee05ca7f6c5974f7 (patch)
treebf993dc82a3a690d49a304f118ef89b755c194f9 /src/include
parent8b143c5c8bb2825b8ea1a704066023307c49e21f (diff)
rtc: Add an RTC API, and implement it for x86.
This CL adds an API for RTC drivers, and implements its two functions, rtc_get and rtc_set, for x86's RTC. The function which resets the clock when the CMOS as lost state now uses the RTC driver instead of accessing the those registers directly. BUG=None TEST=Built and booted on Link with the event log code modified to use the RTC interface. Verified that the event times were accurate. BRANCH=nyan Original-Change-Id: Ifa807898e583254e57167fd44932ea86627a02ee Original-Signed-off-by: Gabe Black <gabeblack@google.com> Original-Reviewed-on: https://chromium-review.googlesource.com/197795 Original-Reviewed-by: David Hendricks <dhendrix@chromium.org> Original-Tested-by: Gabe Black <gabeblack@chromium.org> Original-Commit-Queue: Gabe Black <gabeblack@chromium.org> This is the first half of the patch. (cherry picked from commit 9e0fd75142d29afe34f6c6b9ce0099f478ca5a93) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I159f9b4872a0bb932961b4168b180c087dfb1883 Reviewed-on: http://review.coreboot.org/7889 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/include')
-rw-r--r--src/include/bcd.h35
-rw-r--r--src/include/rtc.h37
2 files changed, 72 insertions, 0 deletions
diff --git a/src/include/bcd.h b/src/include/bcd.h
new file mode 100644
index 0000000000..a0850271b8
--- /dev/null
+++ b/src/include/bcd.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google, 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef _BCD_H_
+#define _BCD_H_
+
+#include <stdint.h>
+
+static inline uint8_t bcd2bin(uint8_t val)
+{
+ return ((val >> 4) & 0xf) * 10 + (val & 0xf);
+}
+
+static inline uint8_t bin2bcd(uint8_t val)
+{
+ return ((val / 10) << 4) | (val % 10);
+}
+
+#endif /* _BCD_H_ */
diff --git a/src/include/rtc.h b/src/include/rtc.h
new file mode 100644
index 0000000000..ed32b6993b
--- /dev/null
+++ b/src/include/rtc.h
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google, 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+
+#ifndef _RTC_H_
+#define _RTC_H_
+
+struct rtc_time
+{
+ int sec;
+ int min;
+ int hour;
+ int mday;
+ int mon;
+ int year;
+ int wday;
+};
+
+int rtc_set(const struct rtc_time *time, u8 has_century);
+int rtc_get(struct rtc_time *time, u8 has_century);
+
+#endif /* _RTC_H_ */