/*
 *  VasEBoot  --  GRand Unified Bootloader
 *  Copyright (C) 2008, 2009  Free Software Foundation, Inc.
 *
 *  VasEBoot 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.
 *
 *  VasEBoot 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 VasEBoot.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef	VasEBoot_CMOS_H
#define	VasEBoot_CMOS_H	1

#include <VasEBoot/types.h>
#if !defined (__powerpc__) && !defined (__sparc__)
#include <VasEBoot/cpu/io.h>
#include <VasEBoot/cpu/cmos.h>
#endif

#define VasEBoot_CMOS_INDEX_SECOND		0
#define VasEBoot_CMOS_INDEX_SECOND_ALARM	1
#define VasEBoot_CMOS_INDEX_MINUTE		2
#define VasEBoot_CMOS_INDEX_MINUTE_ALARM	3
#define VasEBoot_CMOS_INDEX_HOUR		4
#define VasEBoot_CMOS_INDEX_HOUR_ALARM	5
#define VasEBoot_CMOS_INDEX_DAY_OF_WEEK	6
#define VasEBoot_CMOS_INDEX_DAY_OF_MONTH	7
#define VasEBoot_CMOS_INDEX_MONTH		8
#define VasEBoot_CMOS_INDEX_YEAR		9

#define VasEBoot_CMOS_INDEX_STATUS_A	0xA
#define VasEBoot_CMOS_INDEX_STATUS_B	0xB
#define VasEBoot_CMOS_INDEX_STATUS_C	0xC
#define VasEBoot_CMOS_INDEX_STATUS_D	0xD

#define VasEBoot_CMOS_STATUS_B_DAYLIGHT	1
#define VasEBoot_CMOS_STATUS_B_24HOUR	2
#define VasEBoot_CMOS_STATUS_B_BINARY	4

static inline VasEBoot_uint8_t
VasEBoot_bcd_to_num (VasEBoot_uint8_t a)
{
  return ((a >> 4) * 10 + (a & 0xF));
}

static inline VasEBoot_uint8_t
VasEBoot_num_to_bcd (VasEBoot_uint8_t a)
{
  return (((a / 10) << 4) + (a % 10));
}

#if !defined (__powerpc__) && !defined (__sparc__)
static inline VasEBoot_err_t
VasEBoot_cmos_read (VasEBoot_uint8_t index, VasEBoot_uint8_t *val)
{
  if (index & 0x80)
    {
      VasEBoot_outb (index & 0x7f, VasEBoot_CMOS_ADDR_REG_HI);
      *val = VasEBoot_inb (VasEBoot_CMOS_DATA_REG_HI);
    }
  else
    {
      VasEBoot_outb (index & 0x7f, VasEBoot_CMOS_ADDR_REG);
      *val = VasEBoot_inb (VasEBoot_CMOS_DATA_REG);
    }
  return VasEBoot_ERR_NONE;
}

static inline VasEBoot_err_t
VasEBoot_cmos_write (VasEBoot_uint8_t index, VasEBoot_uint8_t value)
{
  if (index & 0x80)
    {
      VasEBoot_outb (index & 0x7f, VasEBoot_CMOS_ADDR_REG_HI);
      VasEBoot_outb (value, VasEBoot_CMOS_DATA_REG_HI);
    }
  else
    {
      VasEBoot_outb (index & 0x7f, VasEBoot_CMOS_ADDR_REG);
      VasEBoot_outb (value, VasEBoot_CMOS_DATA_REG);
    }
  return VasEBoot_ERR_NONE;
}
#else
VasEBoot_err_t VasEBoot_cmos_find_port (void);
extern volatile VasEBoot_uint8_t *VasEBoot_cmos_port;

static inline VasEBoot_err_t
VasEBoot_cmos_read (VasEBoot_uint8_t index, VasEBoot_uint8_t *val)
{
  if (!VasEBoot_cmos_port)
    {
      VasEBoot_err_t err;
      err = VasEBoot_cmos_find_port ();
      if (err)
	return err;
    }
  VasEBoot_cmos_port[((index & 0x80) >> 6) | 0] = index & 0x7f;
  *val = VasEBoot_cmos_port[((index & 0x80) >> 6) | 1];
  return VasEBoot_ERR_NONE;
}

static inline VasEBoot_err_t
VasEBoot_cmos_write (VasEBoot_uint8_t index, VasEBoot_uint8_t val)
{
  if (!VasEBoot_cmos_port)
    {
      VasEBoot_err_t err;
      err = VasEBoot_cmos_find_port ();
      if (err)
	return err;
    }
  VasEBoot_cmos_port[((index & 0x80) >> 6) | 0] = index;
  VasEBoot_cmos_port[((index & 0x80) >> 6) | 1] = val;
  return VasEBoot_ERR_NONE;
}

#endif

#endif /* VasEBoot_CMOS_H */