apm_bios.h

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/*
 * Include file for the interface to an APM BIOS
 * Copyright 1994-2001 Stephen Rothwell ([email protected])
 *
 * 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.
 */
#ifndef _LINUX_APM_H
#define _LINUX_APM_H

#include <uapi/linux/apm_bios.h>


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

/* 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         forbid_idle;
    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;

/*
 * 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  /* LINUX_APM_H */