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#ifndef _LINUX_APM_H
#define _LINUX_APM_H

/*
 * Include file for the interface to an APM BIOS
 * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
 *
 * This program 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 2, or (at your option) any
 * later version.
 *
 * This program 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.
 */


typedef unsigned short  apm_event_t;
typedef unsigned short  apm_eventinfo_t;

#ifdef __KERNEL__

#define APM_CS          (GDT_ENTRY_APMBIOS_BASE * 8)
#define APM_CS_16       (APM_CS + 8)
#define APM_DS          (APM_CS_16 + 8)

struct apm_bios_info {
        unsigned short  version;
        unsigned short  cseg;
        unsigned long   offset;
        unsigned short  cseg_16;
        unsigned short  dseg;
        unsigned short  flags;
        unsigned short  cseg_len;
        unsigned short  cseg_16_len;
        unsigned short  dseg_len;
};

/* Results of APM Installation Check */
#define APM_16_BIT_SUPPORT      0x0001
#define APM_32_BIT_SUPPORT      0x0002
#define APM_IDLE_SLOWS_CLOCK    0x0004
#define APM_BIOS_DISABLED       0x0008
#define APM_BIOS_DISENGAGED     0x0010

/*
 * Data for APM that is persistent across module unload/load
 */

struct apm_info {
        struct apm_bios_info    bios;
        unsigned short          connection_version;
        int                     get_power_status_broken;
        int                     get_power_status_swabinminutes;
        int                     allow_ints;
        int                     realmode_power_off;
        int                     disabled;
};

/*
 * The APM function codes
 */

#define APM_FUNC_INST_CHECK     0x5300
#define APM_FUNC_REAL_CONN      0x5301
#define APM_FUNC_16BIT_CONN     0x5302
#define APM_FUNC_32BIT_CONN     0x5303
#define APM_FUNC_DISCONN        0x5304
#define APM_FUNC_IDLE           0x5305
#define APM_FUNC_BUSY           0x5306
#define APM_FUNC_SET_STATE      0x5307
#define APM_FUNC_ENABLE_PM      0x5308
#define APM_FUNC_RESTORE_BIOS   0x5309
#define APM_FUNC_GET_STATUS     0x530a
#define APM_FUNC_GET_EVENT      0x530b
#define APM_FUNC_GET_STATE      0x530c
#define APM_FUNC_ENABLE_DEV_PM  0x530d
#define APM_FUNC_VERSION        0x530e
#define APM_FUNC_ENGAGE_PM      0x530f
#define APM_FUNC_GET_CAP        0x5310
#define APM_FUNC_RESUME_TIMER   0x5311
#define APM_FUNC_RESUME_ON_RING 0x5312
#define APM_FUNC_TIMER          0x5313

/*
 * Function code for APM_FUNC_RESUME_TIMER
 */

#define APM_FUNC_DISABLE_TIMER  0
#define APM_FUNC_GET_TIMER      1
#define APM_FUNC_SET_TIMER      2

/*
 * Function code for APM_FUNC_RESUME_ON_RING
 */

#define APM_FUNC_DISABLE_RING   0
#define APM_FUNC_ENABLE_RING    1
#define APM_FUNC_GET_RING       2

/*
 * Function code for APM_FUNC_TIMER_STATUS
 */

#define APM_FUNC_TIMER_DISABLE  0
#define APM_FUNC_TIMER_ENABLE   1
#define APM_FUNC_TIMER_GET      2

/*
 * in arch/i386/kernel/setup.c
 */

extern struct apm_info  apm_info;

#endif  /* __KERNEL__ */

/*
 * Power states
 */

#define APM_STATE_READY         0x0000
#define APM_STATE_STANDBY       0x0001
#define APM_STATE_SUSPEND       0x0002
#define APM_STATE_OFF           0x0003
#define APM_STATE_BUSY          0x0004
#define APM_STATE_REJECT        0x0005
#define APM_STATE_OEM_SYS       0x0020
#define APM_STATE_OEM_DEV       0x0040

#define APM_STATE_DISABLE       0x0000
#define APM_STATE_ENABLE        0x0001

#define APM_STATE_DISENGAGE     0x0000
#define APM_STATE_ENGAGE        0x0001

/*
 * Events (results of Get PM Event)
 */

#define APM_SYS_STANDBY         0x0001
#define APM_SYS_SUSPEND         0x0002
#define APM_NORMAL_RESUME       0x0003
#define APM_CRITICAL_RESUME     0x0004
#define APM_LOW_BATTERY         0x0005
#define APM_POWER_STATUS_CHANGE 0x0006
#define APM_UPDATE_TIME         0x0007
#define APM_CRITICAL_SUSPEND    0x0008
#define APM_USER_STANDBY        0x0009
#define APM_USER_SUSPEND        0x000a
#define APM_STANDBY_RESUME      0x000b
#define APM_CAPABILITY_CHANGE   0x000c

/*
 * Error codes
 */

#define APM_SUCCESS             0x00
#define APM_DISABLED            0x01
#define APM_CONNECTED           0x02
#define APM_NOT_CONNECTED       0x03
#define APM_16_CONNECTED        0x05
#define APM_16_UNSUPPORTED      0x06
#define APM_32_CONNECTED        0x07
#define APM_32_UNSUPPORTED      0x08
#define APM_BAD_DEVICE          0x09
#define APM_BAD_PARAM           0x0a
#define APM_NOT_ENGAGED         0x0b
#define APM_BAD_FUNCTION        0x0c
#define APM_RESUME_DISABLED     0x0d
#define APM_NO_ERROR            0x53
#define APM_BAD_STATE           0x60
#define APM_NO_EVENTS           0x80
#define APM_NOT_PRESENT         0x86

/*
 * APM Device IDs
 */

#define APM_DEVICE_BIOS         0x0000
#define APM_DEVICE_ALL          0x0001
#define APM_DEVICE_DISPLAY      0x0100
#define APM_DEVICE_STORAGE      0x0200
#define APM_DEVICE_PARALLEL     0x0300
#define APM_DEVICE_SERIAL       0x0400
#define APM_DEVICE_NETWORK      0x0500
#define APM_DEVICE_PCMCIA       0x0600
#define APM_DEVICE_BATTERY      0x8000
#define APM_DEVICE_OEM          0xe000
#define APM_DEVICE_OLD_ALL      0xffff
#define APM_DEVICE_CLASS        0x00ff
#define APM_DEVICE_MASK         0xff00

#ifdef __KERNEL__
/*
 * This is the "All Devices" ID communicated to the BIOS
 */

#define APM_DEVICE_BALL         ((apm_info.connection_version > 0x0100) ? \
                                 APM_DEVICE_ALL : APM_DEVICE_OLD_ALL)

#endif

/*
 * Battery status
 */

#define APM_MAX_BATTERIES       2

/*
 * APM defined capability bit flags
 */

#define APM_CAP_GLOBAL_STANDBY          0x0001
#define APM_CAP_GLOBAL_SUSPEND          0x0002
#define APM_CAP_RESUME_STANDBY_TIMER    0x0004 /* Timer resume from standby */
#define APM_CAP_RESUME_SUSPEND_TIMER    0x0008 /* Timer resume from suspend */
#define APM_CAP_RESUME_STANDBY_RING     0x0010 /* Resume on Ring fr standby */
#define APM_CAP_RESUME_SUSPEND_RING     0x0020 /* Resume on Ring fr suspend */
#define APM_CAP_RESUME_STANDBY_PCMCIA   0x0040 /* Resume on PCMCIA Ring */
#define APM_CAP_RESUME_SUSPEND_PCMCIA   0x0080 /* Resume on PCMCIA Ring */

/*
 * ioctl operations
 */

#include <linux/ioctl.h>

#define APM_IOC_STANDBY         _IO('A', 1)
#define APM_IOC_SUSPEND         _IO('A', 2)

#endif  /* LINUX_APM_H */