1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Include file for the interface to an APM BIOS
4 * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
5 */
6#ifndef _LINUX_APM_H
7#define _LINUX_APM_H
8
9#include <uapi/linux/apm_bios.h>
10
11
12#define APM_CS		(GDT_ENTRY_APMBIOS_BASE * 8)
13#define APM_CS_16	(APM_CS + 8)
14#define APM_DS		(APM_CS_16 + 8)
15
16/* Results of APM Installation Check */
17#define APM_16_BIT_SUPPORT	0x0001
18#define APM_32_BIT_SUPPORT	0x0002
19#define APM_IDLE_SLOWS_CLOCK	0x0004
20#define APM_BIOS_DISABLED      	0x0008
21#define APM_BIOS_DISENGAGED     0x0010
22
23/*
24 * Data for APM that is persistent across module unload/load
25 */
26struct apm_info {
27	struct apm_bios_info	bios;
28	unsigned short		connection_version;
29	int			get_power_status_broken;
30	int			get_power_status_swabinminutes;
31	int			allow_ints;
32	int			forbid_idle;
33	int			realmode_power_off;
34	int			disabled;
35};
36
37/*
38 * The APM function codes
39 */
40#define	APM_FUNC_INST_CHECK	0x5300
41#define	APM_FUNC_REAL_CONN	0x5301
42#define	APM_FUNC_16BIT_CONN	0x5302
43#define	APM_FUNC_32BIT_CONN	0x5303
44#define	APM_FUNC_DISCONN	0x5304
45#define	APM_FUNC_IDLE		0x5305
46#define	APM_FUNC_BUSY		0x5306
47#define	APM_FUNC_SET_STATE	0x5307
48#define	APM_FUNC_ENABLE_PM	0x5308
49#define	APM_FUNC_RESTORE_BIOS	0x5309
50#define	APM_FUNC_GET_STATUS	0x530a
51#define	APM_FUNC_GET_EVENT	0x530b
52#define	APM_FUNC_GET_STATE	0x530c
53#define	APM_FUNC_ENABLE_DEV_PM	0x530d
54#define	APM_FUNC_VERSION	0x530e
55#define	APM_FUNC_ENGAGE_PM	0x530f
56#define	APM_FUNC_GET_CAP	0x5310
57#define	APM_FUNC_RESUME_TIMER	0x5311
58#define	APM_FUNC_RESUME_ON_RING	0x5312
59#define	APM_FUNC_TIMER		0x5313
60
61/*
62 * Function code for APM_FUNC_RESUME_TIMER
63 */
64#define	APM_FUNC_DISABLE_TIMER	0
65#define	APM_FUNC_GET_TIMER	1
66#define	APM_FUNC_SET_TIMER	2
67
68/*
69 * Function code for APM_FUNC_RESUME_ON_RING
70 */
71#define	APM_FUNC_DISABLE_RING	0
72#define	APM_FUNC_ENABLE_RING	1
73#define	APM_FUNC_GET_RING	2
74
75/*
76 * Function code for APM_FUNC_TIMER_STATUS
77 */
78#define	APM_FUNC_TIMER_DISABLE	0
79#define	APM_FUNC_TIMER_ENABLE	1
80#define	APM_FUNC_TIMER_GET	2
81
82/*
83 * in arch/i386/kernel/setup.c
84 */
85extern struct apm_info	apm_info;
86
87/*
88 * This is the "All Devices" ID communicated to the BIOS
89 */
90#define APM_DEVICE_BALL		((apm_info.connection_version > 0x0100) ? \
91				 APM_DEVICE_ALL : APM_DEVICE_OLD_ALL)
92#endif	/* LINUX_APM_H */
93