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/* 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;
}
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