1 files changed, 156 insertions, 0 deletions
diff --git a/grub-core/lib/ieee1275/datetime.c b/grub-core/lib/ieee1275/datetime.c
new file mode 100644
index 0000000..b81fba2
--- /dev/null
+++ b/grub-core/lib/ieee1275/datetime.c
@@ -0,0 +1,156 @@
+/* kern/cmos_datetime.c - CMOS datetime function.
+ *
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2008,2009  Free Software Foundation, Inc.
+ *
+ *  GRUB 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, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/datetime.h>
+#include <grub/ieee1275/ieee1275.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+#if defined (__powerpc__) || defined (__sparc__)
+#include <grub/cmos.h>
+#endif
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static char *rtc = 0;
+static int no_ieee1275_rtc = 0;
+
+/* Helper for find_rtc.  */
+static int
+find_rtc_iter (struct grub_ieee1275_devalias *alias)
+{
+  if (grub_strcmp (alias->type, "rtc") == 0)
+    {
+      grub_dprintf ("datetime", "Found RTC %s\n", alias->path);
+      rtc = grub_strdup (alias->path);
+      return 1;
+    }
+  return 0;
+}
+
+static void
+find_rtc (void)
+{
+  grub_ieee1275_devices_iterate (find_rtc_iter);
+  if (!rtc)
+    no_ieee1275_rtc = 1;
+}
+
+grub_err_t
+grub_get_datetime (struct grub_datetime *datetime)
+{
+  struct get_time_args
+  {
+    struct grub_ieee1275_common_hdr common;
+    grub_ieee1275_cell_t method;
+    grub_ieee1275_cell_t device;
+    grub_ieee1275_cell_t catch_result;
+    grub_ieee1275_cell_t year;
+    grub_ieee1275_cell_t month;
+    grub_ieee1275_cell_t day;
+    grub_ieee1275_cell_t hour;
+    grub_ieee1275_cell_t minute;
+    grub_ieee1275_cell_t second;
+  }
+  args;
+  int status;
+  grub_ieee1275_ihandle_t ihandle;
+
+  if (no_ieee1275_rtc)
+    return grub_get_datetime_cmos (datetime);
+  if (!rtc)
+    find_rtc ();
+  if (!rtc)
+    return grub_get_datetime_cmos (datetime);
+
+  status = grub_ieee1275_open (rtc, &ihandle);
+  if (status == -1)
+    return grub_error (GRUB_ERR_IO, "couldn't open RTC");
+
+  INIT_IEEE1275_COMMON (&args.common, "call-method", 2, 7);
+  args.device = (grub_ieee1275_cell_t) ihandle;
+  args.method = (grub_ieee1275_cell_t) "get-time";
+
+  status = IEEE1275_CALL_ENTRY_FN (&args);
+
+  grub_ieee1275_close (ihandle);
+
+  if (status == -1 || args.catch_result)
+    return grub_error (GRUB_ERR_IO, "get-time failed");
+
+  datetime->year = args.year;
+  datetime->month = args.month;
+  datetime->day = args.day + 1;
+  datetime->hour = args.hour;
+  datetime->minute = args.minute;
+  datetime->second = args.second;
+
+  return GRUB_ERR_NONE;
+}
+
+grub_err_t
+grub_set_datetime (struct grub_datetime *datetime)
+{
+  struct set_time_args
+  {
+    struct grub_ieee1275_common_hdr common;
+    grub_ieee1275_cell_t method;
+    grub_ieee1275_cell_t device;
+    grub_ieee1275_cell_t year;
+    grub_ieee1275_cell_t month;
+    grub_ieee1275_cell_t day;
+    grub_ieee1275_cell_t hour;
+    grub_ieee1275_cell_t minute;
+    grub_ieee1275_cell_t second;
+    grub_ieee1275_cell_t catch_result;
+  }
+  args;
+  int status;
+  grub_ieee1275_ihandle_t ihandle;
+
+  if (no_ieee1275_rtc)
+    return grub_set_datetime_cmos (datetime);
+  if (!rtc)
+    find_rtc ();
+  if (!rtc)
+    return grub_set_datetime_cmos (datetime);
+
+  status = grub_ieee1275_open (rtc, &ihandle);
+  if (status == -1)
+    return grub_error (GRUB_ERR_IO, "couldn't open RTC");
+
+  INIT_IEEE1275_COMMON (&args.common, "call-method", 8, 1);
+  args.device = (grub_ieee1275_cell_t) ihandle;
+  args.method = (grub_ieee1275_cell_t) "set-time";
+
+  args.year = datetime->year;
+  args.month = datetime->month;
+  args.day = datetime->day - 1;
+  args.hour = datetime->hour;
+  args.minute = datetime->minute;
+  args.second = datetime->second;
+
+  status = IEEE1275_CALL_ENTRY_FN (&args);
+
+  grub_ieee1275_close (ihandle);
+
+  if (status == -1 || args.catch_result)
+    return grub_error (GRUB_ERR_IO, "set-time failed");
+
+  return GRUB_ERR_NONE;
+}