arch/all-pc/battclock/battclock_init.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include <aros/debug.h>
   7 #include <aros/symbolsets.h>
   8 #include <proto/acpica.h>
   9 #include <proto/exec.h>
  10
  11 #include "battclock_intern.h"
  12 #include "cmos.h"
  13
  14 /* acpica.library is optional */
  15 struct Library *ACPICABase = NULL;
  16
  17 /* auto init */
  18 static int BattClock_Init(struct BattClockBase *BattClockBase)
  19 {
  20     InitSemaphore(&BattClockBase->sem);
  21     BattClockBase->century = CENTURY;   /* Default offset */
  22
  23     if ((ACPICABase = OpenLibrary("acpica.library",0)))
  24     {
  25         ACPI_TABLE_FADT *fadt;
  26         ACPI_STATUS err;
  27
  28         err = AcpiGetTable("FACP", 1, (ACPI_TABLE_HEADER **)&fadt);
  29         if (err == AE_OK) {
  30             if ((fadt->Header.Length >= offsetof(ACPI_TABLE_FADT, Century)) &&
  31                 fadt->Century)
  32             {
  33                 D(bug("[BattClock] Got RTC century offset 0x%02X from ACPI\n", fadt->Century));
  34                 BattClockBase->century = fadt->Century;
  35             }
  36         }
  37         CloseLibrary(ACPICABase);
  38         ACPICABase = NULL;
  39     }
  40
  41     return 1;
  42 }
  43
  44 ADD2INITLIB(BattClock_Init, 0)