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
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