xref: /linux/include/linux/apm_bios.h (revision 58e16d792a6a8c6b750f637a4649967fcac853dc)
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  */
26 struct 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  */
85 extern 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