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1 /*
2  * Include file for the interface to an APM BIOS
3  * Copyright 1994-2001 Stephen Rothwell (sfr@canb.auug.org.au)
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the
7  * Free Software Foundation; either version 2, or (at your option) any
8  * later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License for more details.
14  */
15 #ifndef _LINUX_APM_H
16 #define _LINUX_APM_H
17 
18 #include <uapi/linux/apm_bios.h>
19 
20 
21 #define APM_CS		(GDT_ENTRY_APMBIOS_BASE * 8)
22 #define APM_CS_16	(APM_CS + 8)
23 #define APM_DS		(APM_CS_16 + 8)
24 
25 /* Results of APM Installation Check */
26 #define APM_16_BIT_SUPPORT	0x0001
27 #define APM_32_BIT_SUPPORT	0x0002
28 #define APM_IDLE_SLOWS_CLOCK	0x0004
29 #define APM_BIOS_DISABLED      	0x0008
30 #define APM_BIOS_DISENGAGED     0x0010
31 
32 /*
33  * Data for APM that is persistent across module unload/load
34  */
35 struct apm_info {
36 	struct apm_bios_info	bios;
37 	unsigned short		connection_version;
38 	int			get_power_status_broken;
39 	int			get_power_status_swabinminutes;
40 	int			allow_ints;
41 	int			forbid_idle;
42 	int			realmode_power_off;
43 	int			disabled;
44 };
45 
46 /*
47  * The APM function codes
48  */
49 #define	APM_FUNC_INST_CHECK	0x5300
50 #define	APM_FUNC_REAL_CONN	0x5301
51 #define	APM_FUNC_16BIT_CONN	0x5302
52 #define	APM_FUNC_32BIT_CONN	0x5303
53 #define	APM_FUNC_DISCONN	0x5304
54 #define	APM_FUNC_IDLE		0x5305
55 #define	APM_FUNC_BUSY		0x5306
56 #define	APM_FUNC_SET_STATE	0x5307
57 #define	APM_FUNC_ENABLE_PM	0x5308
58 #define	APM_FUNC_RESTORE_BIOS	0x5309
59 #define	APM_FUNC_GET_STATUS	0x530a
60 #define	APM_FUNC_GET_EVENT	0x530b
61 #define	APM_FUNC_GET_STATE	0x530c
62 #define	APM_FUNC_ENABLE_DEV_PM	0x530d
63 #define	APM_FUNC_VERSION	0x530e
64 #define	APM_FUNC_ENGAGE_PM	0x530f
65 #define	APM_FUNC_GET_CAP	0x5310
66 #define	APM_FUNC_RESUME_TIMER	0x5311
67 #define	APM_FUNC_RESUME_ON_RING	0x5312
68 #define	APM_FUNC_TIMER		0x5313
69 
70 /*
71  * Function code for APM_FUNC_RESUME_TIMER
72  */
73 #define	APM_FUNC_DISABLE_TIMER	0
74 #define	APM_FUNC_GET_TIMER	1
75 #define	APM_FUNC_SET_TIMER	2
76 
77 /*
78  * Function code for APM_FUNC_RESUME_ON_RING
79  */
80 #define	APM_FUNC_DISABLE_RING	0
81 #define	APM_FUNC_ENABLE_RING	1
82 #define	APM_FUNC_GET_RING	2
83 
84 /*
85  * Function code for APM_FUNC_TIMER_STATUS
86  */
87 #define	APM_FUNC_TIMER_DISABLE	0
88 #define	APM_FUNC_TIMER_ENABLE	1
89 #define	APM_FUNC_TIMER_GET	2
90 
91 /*
92  * in arch/i386/kernel/setup.c
93  */
94 extern struct apm_info	apm_info;
95 
96 /*
97  * This is the "All Devices" ID communicated to the BIOS
98  */
99 #define APM_DEVICE_BALL		((apm_info.connection_version > 0x0100) ? \
100 				 APM_DEVICE_ALL : APM_DEVICE_OLD_ALL)
101 #endif	/* LINUX_APM_H */
102