arch/all-pc/battclock/battclock_init.c

   1 /*
   2     Copyright © 1995-2017, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 0
   7 #include <aros/debug.h>
   8
   9 #include <aros/symbolsets.h>
  10 #include <proto/acpica.h>
  11 #include <proto/exec.h>
  12
  13 #include "battclock_intern.h"
  14 #include "cmos.h"
  15
  16 /* acpica.library is optional */
  17 struct Library *ACPICABase = NULL;
  18
  19 /* auto init */
  20 static int BattClock_Init(struct BattClockBase *BattClockBase)
  21 {
  22     InitSemaphore(&BattClockBase->sem);
  23     BattClockBase->century = CENTURY;   /* Default offset */
  24
  25     if ((ACPICABase = OpenLibrary("acpica.library",0)))
  26     {
  27         ACPI_TABLE_FADT *fadt;
  28         ACPI_STATUS err;
  29
  30         err = AcpiGetTable("FACP", 1, (ACPI_TABLE_HEADER **)&fadt);
  31         if (err == AE_OK) {
  32             if ((fadt->Header.Length >= offsetof(ACPI_TABLE_FADT, Century)) &&
  33                 fadt->Century)
  34             {
  35                 D(bug("[BattClock] Got RTC century offset 0x%02X from ACPI\n", fadt->Century));
  36                 BattClockBase->century = fadt->Century;
  37             }
  38         }
  39         CloseLibrary(ACPICABase);
  40         ACPICABase = NULL;
  41     }
  42
  43     return 1;
  44 }
  45
  46 ADD2INITLIB(BattClock_Init, 0)