156 lines
4 KiB
C
156 lines
4 KiB
C
/* kern/cmos_datetime.c - CMOS datetime function.
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*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/datetime.h>
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#include <grub/ieee1275/ieee1275.h>
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#include <grub/misc.h>
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#include <grub/dl.h>
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#if defined (__powerpc__) || defined (__sparc__)
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#include <grub/cmos.h>
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#endif
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GRUB_MOD_LICENSE ("GPLv3+");
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static char *rtc = 0;
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static int no_ieee1275_rtc = 0;
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/* Helper for find_rtc. */
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static int
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find_rtc_iter (struct grub_ieee1275_devalias *alias)
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{
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if (grub_strcmp (alias->type, "rtc") == 0)
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{
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grub_dprintf ("datetime", "Found RTC %s\n", alias->path);
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rtc = grub_strdup (alias->path);
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return 1;
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}
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return 0;
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}
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static void
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find_rtc (void)
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{
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grub_ieee1275_devices_iterate (find_rtc_iter);
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if (!rtc)
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no_ieee1275_rtc = 1;
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}
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grub_err_t
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grub_get_datetime (struct grub_datetime *datetime)
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{
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struct get_time_args
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{
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struct grub_ieee1275_common_hdr common;
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grub_ieee1275_cell_t method;
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grub_ieee1275_cell_t device;
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grub_ieee1275_cell_t catch_result;
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grub_ieee1275_cell_t year;
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grub_ieee1275_cell_t month;
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grub_ieee1275_cell_t day;
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grub_ieee1275_cell_t hour;
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grub_ieee1275_cell_t minute;
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grub_ieee1275_cell_t second;
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}
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args;
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int status;
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grub_ieee1275_ihandle_t ihandle;
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if (no_ieee1275_rtc)
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return grub_get_datetime_cmos (datetime);
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if (!rtc)
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find_rtc ();
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if (!rtc)
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return grub_get_datetime_cmos (datetime);
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status = grub_ieee1275_open (rtc, &ihandle);
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if (status == -1)
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return grub_error (GRUB_ERR_IO, "couldn't open RTC");
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INIT_IEEE1275_COMMON (&args.common, "call-method", 2, 7);
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args.device = (grub_ieee1275_cell_t) ihandle;
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args.method = (grub_ieee1275_cell_t) "get-time";
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status = IEEE1275_CALL_ENTRY_FN (&args);
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grub_ieee1275_close (ihandle);
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if (status == -1 || args.catch_result)
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return grub_error (GRUB_ERR_IO, "get-time failed");
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datetime->year = args.year;
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datetime->month = args.month;
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datetime->day = args.day + 1;
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datetime->hour = args.hour;
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datetime->minute = args.minute;
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datetime->second = args.second;
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return GRUB_ERR_NONE;
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}
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grub_err_t
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grub_set_datetime (struct grub_datetime *datetime)
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{
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struct set_time_args
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{
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struct grub_ieee1275_common_hdr common;
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grub_ieee1275_cell_t method;
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grub_ieee1275_cell_t device;
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grub_ieee1275_cell_t year;
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grub_ieee1275_cell_t month;
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grub_ieee1275_cell_t day;
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grub_ieee1275_cell_t hour;
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grub_ieee1275_cell_t minute;
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grub_ieee1275_cell_t second;
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grub_ieee1275_cell_t catch_result;
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}
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args;
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int status;
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grub_ieee1275_ihandle_t ihandle;
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if (no_ieee1275_rtc)
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return grub_set_datetime_cmos (datetime);
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if (!rtc)
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find_rtc ();
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if (!rtc)
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return grub_set_datetime_cmos (datetime);
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status = grub_ieee1275_open (rtc, &ihandle);
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if (status == -1)
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return grub_error (GRUB_ERR_IO, "couldn't open RTC");
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INIT_IEEE1275_COMMON (&args.common, "call-method", 8, 1);
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args.device = (grub_ieee1275_cell_t) ihandle;
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args.method = (grub_ieee1275_cell_t) "set-time";
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args.year = datetime->year;
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args.month = datetime->month;
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args.day = datetime->day - 1;
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args.hour = datetime->hour;
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args.minute = datetime->minute;
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args.second = datetime->second;
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status = IEEE1275_CALL_ENTRY_FN (&args);
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grub_ieee1275_close (ihandle);
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if (status == -1 || args.catch_result)
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return grub_error (GRUB_ERR_IO, "set-time failed");
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return GRUB_ERR_NONE;
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}
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