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apm_bios.h
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1 /*
2  * Include file for the interface to an APM BIOS
3  * Copyright 1994-2001 Stephen Rothwell ([email protected])
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 {
37  unsigned short connection_version;
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 */