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#ifndef _LINUX_APM_H

#define _LINUX_APM_H

/*

 * Include file for the interface to an APM BIOS

 * Copyright 1994-1999 Stephen Rothwell (Stephen.Rothwell@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;

#ifdef __KERNEL__

#include <linux/tasks.h>        /* for NR_TASKS */

#include <linux/sched.h>        /* for _TSS */

#define APM_CS          _TSS(NR_TASKS)

#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  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

/*

 * Maximum number of events stored

 */

#define APM_MAX_EVENTS          20

/*

 * The per-file APM data

 */

struct apm_bios_struct {

        int             magic;

        struct apm_bios_struct *        next;

        int             suser;

        int             suspends_pending;

        int             standbys_pending;

        int             suspends_read;

        int             standbys_read;

        int             event_head;

        int             event_tail;

        apm_event_t     events[APM_MAX_EVENTS];

};

/*

 * The magic number in apm_bios_struct

 */

#define APM_BIOS_MAGIC          0x4101

/*

 * in init/main.c

 */

extern struct apm_bios_info     apm_bios_info;

extern void             apm_bios_init(void);

extern void             apm_setup(char *, int *);

extern int              apm_register_callback(int (*callback)(apm_event_t));

extern void             apm_unregister_callback(int (*callback)(apm_event_t));

extern void             apm_power_off(void);

extern int              apm_display_blank(void);

extern int              apm_display_unblank(void);

#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

/*

 * 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

/*

 * 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_STATE           0x60

#define APM_NO_EVENTS           0x80

#define APM_NOT_PRESENT         0x86

/* ioctl operations */

#include <linux/ioctl.h>

#define APM_IOC_STANDBY         _IO('A', 1)

#define APM_IOC_SUSPEND         _IO('A', 2)

#endif  /* LINUX_APM_H */