linux/include/acpi/acbuffer.h
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   1/******************************************************************************
   2 *
   3 * Name: acbuffer.h - Support for buffers returned by ACPI predefined names
   4 *
   5 *****************************************************************************/
   6
   7/*
   8 * Copyright (C) 2000 - 2012, Intel Corp.
   9 * All rights reserved.
  10 *
  11 * Redistribution and use in source and binary forms, with or without
  12 * modification, are permitted provided that the following conditions
  13 * are met:
  14 * 1. Redistributions of source code must retain the above copyright
  15 *    notice, this list of conditions, and the following disclaimer,
  16 *    without modification.
  17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18 *    substantially similar to the "NO WARRANTY" disclaimer below
  19 *    ("Disclaimer") and any redistribution must be conditioned upon
  20 *    including a substantially similar Disclaimer requirement for further
  21 *    binary redistribution.
  22 * 3. Neither the names of the above-listed copyright holders nor the names
  23 *    of any contributors may be used to endorse or promote products derived
  24 *    from this software without specific prior written permission.
  25 *
  26 * Alternatively, this software may be distributed under the terms of the
  27 * GNU General Public License ("GPL") version 2 as published by the Free
  28 * Software Foundation.
  29 *
  30 * NO WARRANTY
  31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41 * POSSIBILITY OF SUCH DAMAGES.
  42 */
  43
  44#ifndef __ACBUFFER_H__
  45#define __ACBUFFER_H__
  46
  47/*
  48 * Contains buffer structures for these predefined names:
  49 * _FDE, _GRT, _GTM, _PLD, _SRT
  50 */
  51
  52/*
  53 * Note: C bitfields are not used for this reason:
  54 *
  55 * "Bitfields are great and easy to read, but unfortunately the C language
  56 * does not specify the layout of bitfields in memory, which means they are
  57 * essentially useless for dealing with packed data in on-disk formats or
  58 * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me,
  59 * this decision was a design error in C. Ritchie could have picked an order
  60 * and stuck with it." Norman Ramsey.
  61 * See http://stackoverflow.com/a/1053662/41661
  62 */
  63
  64/* _FDE return value */
  65
  66struct acpi_fde_info {
  67        u32 floppy0;
  68        u32 floppy1;
  69        u32 floppy2;
  70        u32 floppy3;
  71        u32 tape;
  72};
  73
  74/*
  75 * _GRT return value
  76 * _SRT input value
  77 */
  78struct acpi_grt_info {
  79        u16 year;
  80        u8 month;
  81        u8 day;
  82        u8 hour;
  83        u8 minute;
  84        u8 second;
  85        u8 valid;
  86        u16 milliseconds;
  87        u16 timezone;
  88        u8 daylight;
  89        u8 reserved[3];
  90};
  91
  92/* _GTM return value */
  93
  94struct acpi_gtm_info {
  95        u32 pio_speed0;
  96        u32 dma_speed0;
  97        u32 pio_speed1;
  98        u32 dma_speed1;
  99        u32 flags;
 100};
 101
 102/*
 103 * Formatted _PLD return value. The minimum size is a package containing
 104 * one buffer.
 105 * Revision 1: Buffer is 16 bytes (128 bits)
 106 * Revision 2: Buffer is 20 bytes (160 bits)
 107 *
 108 * Note: This structure is returned from the acpi_decode_pld_buffer
 109 * interface.
 110 */
 111struct acpi_pld_info {
 112        u8 revision;
 113        u8 ignore_color;
 114        u32 color;
 115        u16 width;
 116        u16 height;
 117        u8 user_visible;
 118        u8 dock;
 119        u8 lid;
 120        u8 panel;
 121        u8 vertical_position;
 122        u8 horizontal_position;
 123        u8 shape;
 124        u8 group_orientation;
 125        u8 group_token;
 126        u8 group_position;
 127        u8 bay;
 128        u8 ejectable;
 129        u8 ospm_eject_required;
 130        u8 cabinet_number;
 131        u8 card_cage_number;
 132        u8 reference;
 133        u8 rotation;
 134        u8 order;
 135        u8 reserved;
 136        u16 vertical_offset;
 137        u16 horizontal_offset;
 138};
 139
 140/*
 141 * Macros to:
 142 *     1) Convert a _PLD buffer to internal struct acpi_pld_info format - ACPI_PLD_GET*
 143 *        (Used by acpi_decode_pld_buffer)
 144 *     2) Construct a _PLD buffer - ACPI_PLD_SET*
 145 *        (Intended for BIOS use only)
 146 */
 147#define ACPI_PLD_REV1_BUFFER_SIZE               16      /* For Revision 1 of the buffer (From ACPI spec) */
 148#define ACPI_PLD_BUFFER_SIZE                    20      /* For Revision 2 of the buffer (From ACPI spec) */
 149
 150/* First 32-bit dword, bits 0:32 */
 151
 152#define ACPI_PLD_GET_REVISION(dword)            ACPI_GET_BITS (dword, 0, ACPI_7BIT_MASK)
 153#define ACPI_PLD_SET_REVISION(dword,value)      ACPI_SET_BITS (dword, 0, ACPI_7BIT_MASK, value) /* Offset 0, Len 7 */
 154
 155#define ACPI_PLD_GET_IGNORE_COLOR(dword)        ACPI_GET_BITS (dword, 7, ACPI_1BIT_MASK)
 156#define ACPI_PLD_SET_IGNORE_COLOR(dword,value)  ACPI_SET_BITS (dword, 7, ACPI_1BIT_MASK, value) /* Offset 7, Len 1 */
 157
 158#define ACPI_PLD_GET_COLOR(dword)               ACPI_GET_BITS (dword, 8, ACPI_24BIT_MASK)
 159#define ACPI_PLD_SET_COLOR(dword,value)         ACPI_SET_BITS (dword, 8, ACPI_24BIT_MASK, value)        /* Offset 8, Len 24 */
 160
 161/* Second 32-bit dword, bits 33:63 */
 162
 163#define ACPI_PLD_GET_WIDTH(dword)               ACPI_GET_BITS (dword, 0, ACPI_16BIT_MASK)
 164#define ACPI_PLD_SET_WIDTH(dword,value)         ACPI_SET_BITS (dword, 0, ACPI_16BIT_MASK, value)        /* Offset 32+0=32, Len 16 */
 165
 166#define ACPI_PLD_GET_HEIGHT(dword)              ACPI_GET_BITS (dword, 16, ACPI_16BIT_MASK)
 167#define ACPI_PLD_SET_HEIGHT(dword,value)        ACPI_SET_BITS (dword, 16, ACPI_16BIT_MASK, value)       /* Offset 32+16=48, Len 16 */
 168
 169/* Third 32-bit dword, bits 64:95 */
 170
 171#define ACPI_PLD_GET_USER_VISIBLE(dword)        ACPI_GET_BITS (dword, 0, ACPI_1BIT_MASK)
 172#define ACPI_PLD_SET_USER_VISIBLE(dword,value)  ACPI_SET_BITS (dword, 0, ACPI_1BIT_MASK, value) /* Offset 64+0=64, Len 1 */
 173
 174#define ACPI_PLD_GET_DOCK(dword)                ACPI_GET_BITS (dword, 1, ACPI_1BIT_MASK)
 175#define ACPI_PLD_SET_DOCK(dword,value)          ACPI_SET_BITS (dword, 1, ACPI_1BIT_MASK, value) /* Offset 64+1=65, Len 1 */
 176
 177#define ACPI_PLD_GET_LID(dword)                 ACPI_GET_BITS (dword, 2, ACPI_1BIT_MASK)
 178#define ACPI_PLD_SET_LID(dword,value)           ACPI_SET_BITS (dword, 2, ACPI_1BIT_MASK, value) /* Offset 64+2=66, Len 1 */
 179
 180#define ACPI_PLD_GET_PANEL(dword)               ACPI_GET_BITS (dword, 3, ACPI_3BIT_MASK)
 181#define ACPI_PLD_SET_PANEL(dword,value)         ACPI_SET_BITS (dword, 3, ACPI_3BIT_MASK, value) /* Offset 64+3=67, Len 3 */
 182
 183#define ACPI_PLD_GET_VERTICAL(dword)            ACPI_GET_BITS (dword, 6, ACPI_2BIT_MASK)
 184#define ACPI_PLD_SET_VERTICAL(dword,value)      ACPI_SET_BITS (dword, 6, ACPI_2BIT_MASK, value) /* Offset 64+6=70, Len 2 */
 185
 186#define ACPI_PLD_GET_HORIZONTAL(dword)          ACPI_GET_BITS (dword, 8, ACPI_2BIT_MASK)
 187#define ACPI_PLD_SET_HORIZONTAL(dword,value)    ACPI_SET_BITS (dword, 8, ACPI_2BIT_MASK, value) /* Offset 64+8=72, Len 2 */
 188
 189#define ACPI_PLD_GET_SHAPE(dword)               ACPI_GET_BITS (dword, 10, ACPI_4BIT_MASK)
 190#define ACPI_PLD_SET_SHAPE(dword,value)         ACPI_SET_BITS (dword, 10, ACPI_4BIT_MASK, value)        /* Offset 64+10=74, Len 4 */
 191
 192#define ACPI_PLD_GET_ORIENTATION(dword)         ACPI_GET_BITS (dword, 14, ACPI_1BIT_MASK)
 193#define ACPI_PLD_SET_ORIENTATION(dword,value)   ACPI_SET_BITS (dword, 14, ACPI_1BIT_MASK, value)        /* Offset 64+14=78, Len 1 */
 194
 195#define ACPI_PLD_GET_TOKEN(dword)               ACPI_GET_BITS (dword, 15, ACPI_8BIT_MASK)
 196#define ACPI_PLD_SET_TOKEN(dword,value)         ACPI_SET_BITS (dword, 15, ACPI_8BIT_MASK, value)        /* Offset 64+15=79, Len 8 */
 197
 198#define ACPI_PLD_GET_POSITION(dword)            ACPI_GET_BITS (dword, 23, ACPI_8BIT_MASK)
 199#define ACPI_PLD_SET_POSITION(dword,value)      ACPI_SET_BITS (dword, 23, ACPI_8BIT_MASK, value)        /* Offset 64+23=87, Len 8 */
 200
 201#define ACPI_PLD_GET_BAY(dword)                 ACPI_GET_BITS (dword, 31, ACPI_1BIT_MASK)
 202#define ACPI_PLD_SET_BAY(dword,value)           ACPI_SET_BITS (dword, 31, ACPI_1BIT_MASK, value)        /* Offset 64+31=95, Len 1 */
 203
 204/* Fourth 32-bit dword, bits 96:127 */
 205
 206#define ACPI_PLD_GET_EJECTABLE(dword)           ACPI_GET_BITS (dword, 0, ACPI_1BIT_MASK)
 207#define ACPI_PLD_SET_EJECTABLE(dword,value)     ACPI_SET_BITS (dword, 0, ACPI_1BIT_MASK, value) /* Offset 96+0=96, Len 1 */
 208
 209#define ACPI_PLD_GET_OSPM_EJECT(dword)          ACPI_GET_BITS (dword, 1, ACPI_1BIT_MASK)
 210#define ACPI_PLD_SET_OSPM_EJECT(dword,value)    ACPI_SET_BITS (dword, 1, ACPI_1BIT_MASK, value) /* Offset 96+1=97, Len 1 */
 211
 212#define ACPI_PLD_GET_CABINET(dword)             ACPI_GET_BITS (dword, 2, ACPI_8BIT_MASK)
 213#define ACPI_PLD_SET_CABINET(dword,value)       ACPI_SET_BITS (dword, 2, ACPI_8BIT_MASK, value) /* Offset 96+2=98, Len 8 */
 214
 215#define ACPI_PLD_GET_CARD_CAGE(dword)           ACPI_GET_BITS (dword, 10, ACPI_8BIT_MASK)
 216#define ACPI_PLD_SET_CARD_CAGE(dword,value)     ACPI_SET_BITS (dword, 10, ACPI_8BIT_MASK, value)        /* Offset 96+10=106, Len 8 */
 217
 218#define ACPI_PLD_GET_REFERENCE(dword)           ACPI_GET_BITS (dword, 18, ACPI_1BIT_MASK)
 219#define ACPI_PLD_SET_REFERENCE(dword,value)     ACPI_SET_BITS (dword, 18, ACPI_1BIT_MASK, value)        /* Offset 96+18=114, Len 1 */
 220
 221#define ACPI_PLD_GET_ROTATION(dword)            ACPI_GET_BITS (dword, 19, ACPI_4BIT_MASK)
 222#define ACPI_PLD_SET_ROTATION(dword,value)      ACPI_SET_BITS (dword, 19, ACPI_4BIT_MASK, value)        /* Offset 96+19=115, Len 4 */
 223
 224#define ACPI_PLD_GET_ORDER(dword)               ACPI_GET_BITS (dword, 23, ACPI_5BIT_MASK)
 225#define ACPI_PLD_SET_ORDER(dword,value)         ACPI_SET_BITS (dword, 23, ACPI_5BIT_MASK, value)        /* Offset 96+23=119, Len 5 */
 226
 227/* Fifth 32-bit dword, bits 128:159 (Revision 2 of _PLD only) */
 228
 229#define ACPI_PLD_GET_VERT_OFFSET(dword)         ACPI_GET_BITS (dword, 0, ACPI_16BIT_MASK)
 230#define ACPI_PLD_SET_VERT_OFFSET(dword,value)   ACPI_SET_BITS (dword, 0, ACPI_16BIT_MASK, value)        /* Offset 128+0=128, Len 16 */
 231
 232#define ACPI_PLD_GET_HORIZ_OFFSET(dword)        ACPI_GET_BITS (dword, 16, ACPI_16BIT_MASK)
 233#define ACPI_PLD_SET_HORIZ_OFFSET(dword,value)  ACPI_SET_BITS (dword, 16, ACPI_16BIT_MASK, value)       /* Offset 128+16=144, Len 16 */
 234
 235#endif                          /* ACBUFFER_H */
 236
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