include/linux/apm_bios.h

   1 #ifndef _LINUX_APM_H
   2 #define _LINUX_APM_H
   3
   4 /*
   5  * Include file for the interface to an APM BIOS
   6  * Copyright 1994-1998 Stephen Rothwell (Stephen.Rothwell@canb.auug.org.au)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  */
  18
  19 typedef unsigned short  apm_event_t;
  20 typedef unsigned short  apm_eventinfo_t;
  21
  22 #ifdef __KERNEL__
  23
  24 #define APM_40          0x40
  25 #define APM_CS          (APM_40 + 8)
  26 #define APM_CS_16       (APM_CS + 8)
  27 #define APM_DS          (APM_CS_16 + 8)
  28
  29 struct apm_bios_info {
  30         unsigned short  version;
  31         unsigned short  cseg;
  32         unsigned long   offset;
  33         unsigned short  cseg_16;
  34         unsigned short  dseg;
  35         unsigned short  flags;
  36         unsigned short  cseg_len;
  37         unsigned short  cseg_16_len;
  38         unsigned short  dseg_len;
  39 };
  40
  41                                 /* Results of APM Installation Check */
  42 #define APM_16_BIT_SUPPORT      0x0001
  43 #define APM_32_BIT_SUPPORT      0x0002
  44 #define APM_IDLE_SLOWS_CLOCK    0x0004
  45 #define APM_BIOS_DISABLED       0x0008
  46 #define APM_BIOS_DISENGAGED     0x0010
  47
  48 /*
  49  * Maximum number of events stored
  50  */
  51 #define APM_MAX_EVENTS          20
  52
  53 /*
  54  * The per-file APM data
  55  */
  56 struct apm_bios_struct {
  57         int             magic;
  58         struct apm_bios_struct *        next;
  59         int             suser;
  60         int             suspends_pending;
  61         int             standbys_pending;
  62         int             suspends_read;
  63         int             standbys_read;
  64         int             event_head;
  65         int             event_tail;
  66         apm_event_t     events[APM_MAX_EVENTS];
  67 };
  68
  69 /*
  70  * The magic number in apm_bios_struct
  71  */
  72 #define APM_BIOS_MAGIC          0x4101
  73
  74 /*
  75  * in init/main.c
  76  */
  77 extern struct apm_bios_info     apm_bios_info;
  78
  79 extern void             apm_bios_init(void);
  80 extern void             apm_setup(char *, int *);
  81
  82 extern int              apm_register_callback(int (*callback)(apm_event_t));
  83 extern void             apm_unregister_callback(int (*callback)(apm_event_t));
  84
  85 extern void             apm_power_off(void);
  86 extern int              apm_display_blank(void);
  87 extern int              apm_display_unblank(void);
  88
  89 #endif  /* __KERNEL__ */
  90
  91 /*
  92  * Power states
  93  */
  94 #define APM_STATE_READY         0x0000
  95 #define APM_STATE_STANDBY       0x0001
  96 #define APM_STATE_SUSPEND       0x0002
  97 #define APM_STATE_OFF           0x0003
  98 #define APM_STATE_BUSY          0x0004
  99 #define APM_STATE_REJECT        0x0005
 100
 101 /*
 102  * Events (results of Get PM Event)
 103  */
 104 #define APM_SYS_STANDBY         0x0001
 105 #define APM_SYS_SUSPEND         0x0002
 106 #define APM_NORMAL_RESUME       0x0003
 107 #define APM_CRITICAL_RESUME     0x0004
 108 #define APM_LOW_BATTERY         0x0005
 109 #define APM_POWER_STATUS_CHANGE 0x0006
 110 #define APM_UPDATE_TIME         0x0007
 111 #define APM_CRITICAL_SUSPEND    0x0008
 112 #define APM_USER_STANDBY        0x0009
 113 #define APM_USER_SUSPEND        0x000a
 114 #define APM_STANDBY_RESUME      0x000b
 115 #define APM_CAPABILITY_CHANGE   0x000c
 116
 117 /*
 118  * Error codes
 119  */
 120 #define APM_SUCCESS             0x00
 121 #define APM_DISABLED            0x01
 122 #define APM_CONNECTED           0x02
 123 #define APM_NOT_CONNECTED       0x03
 124 #define APM_16_CONNECTED        0x05
 125 #define APM_16_UNSUPPORTED      0x06
 126 #define APM_32_CONNECTED        0x07
 127 #define APM_32_UNSUPPORTED      0x08
 128 #define APM_BAD_DEVICE          0x09
 129 #define APM_BAD_PARAM           0x0a
 130 #define APM_NOT_ENGAGED         0x0b
 131 #define APM_BAD_FUNCTION        0x0c
 132 #define APM_RESUME_DISABLED     0x0d
 133 #define APM_BAD_STATE           0x60
 134 #define APM_NO_EVENTS           0x80
 135 #define APM_NOT_PRESENT         0x86
 136
 137 /* ioctl operations */
 138 #include <linux/ioctl.h>
 139
 140 #define APM_IOC_STANDBY         _IO('A', 1)
 141 #define APM_IOC_SUSPEND         _IO('A', 2)
 142
 143 #endif  /* LINUX_APM_H */