LXR linux/include/acpi/acbuffer.h

   1/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
   2/******************************************************************************
   3 *
   4 * Name: acbuffer.h - Support for buffers returned by ACPI predefined names
   5 *
   6 * Copyright (C) 2000 - 2019, Intel Corp.
   7 *
   8 *****************************************************************************/
   9
  10#ifndef __ACBUFFER_H__
  11#define __ACBUFFER_H__
  12
  13/*
  14 * Contains buffer structures for these predefined names:
  15 * _FDE, _GRT, _GTM, _PLD, _SRT
  16 */
  17
  18/*
  19 * Note: C bitfields are not used for this reason:
  20 *
  21 * "Bitfields are great and easy to read, but unfortunately the C language
  22 * does not specify the layout of bitfields in memory, which means they are
  23 * essentially useless for dealing with packed data in on-disk formats or
  24 * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me,
  25 * this decision was a design error in C. Ritchie could have picked an order
  26 * and stuck with it." Norman Ramsey.
  27 * See http://stackoverflow.com/a/1053662/41661
  28 */
  29
  30/* _FDE return value */
  31
  32struct acpi_fde_info {
  33        u32 floppy0;
  34        u32 floppy1;
  35        u32 floppy2;
  36        u32 floppy3;
  37        u32 tape;
  38};
  39
  40/*
  41 * _GRT return value
  42 * _SRT input value
  43 */
  44struct acpi_grt_info {
  45        u16 year;
  46        u8 month;
  47        u8 day;
  48        u8 hour;
  49        u8 minute;
  50        u8 second;
  51        u8 valid;
  52        u16 milliseconds;
  53        u16 timezone;
  54        u8 daylight;
  55        u8 reserved[3];
  56};
  57
  58/* _GTM return value */
  59
  60struct acpi_gtm_info {
  61        u32 pio_speed0;
  62        u32 dma_speed0;
  63        u32 pio_speed1;
  64        u32 dma_speed1;
  65        u32 flags;
  66};
  67
  68/*
  69 * Formatted _PLD return value. The minimum size is a package containing
  70 * one buffer.
  71 * Revision 1: Buffer is 16 bytes (128 bits)
  72 * Revision 2: Buffer is 20 bytes (160 bits)
  73 *
  74 * Note: This structure is returned from the acpi_decode_pld_buffer
  75 * interface.
  76 */
  77struct acpi_pld_info {
  78        u8 revision;
  79        u8 ignore_color;
  80        u8 red;
  81        u8 green;
  82        u8 blue;
  83        u16 width;
  84        u16 height;
  85        u8 user_visible;
  86        u8 dock;
  87        u8 lid;
  88        u8 panel;
  89        u8 vertical_position;
  90        u8 horizontal_position;
  91        u8 shape;
  92        u8 group_orientation;
  93        u8 group_token;
  94        u8 group_position;
  95        u8 bay;
  96        u8 ejectable;
  97        u8 ospm_eject_required;
  98        u8 cabinet_number;
  99        u8 card_cage_number;
 100        u8 reference;
 101        u8 rotation;
 102        u8 order;
 103        u8 reserved;
 104        u16 vertical_offset;
 105        u16 horizontal_offset;
 106};
 107
 108/*
 109 * Macros to:
 110 *     1) Convert a _PLD buffer to internal struct acpi_pld_info format - ACPI_PLD_GET*
 111 *        (Used by acpi_decode_pld_buffer)
 112 *     2) Construct a _PLD buffer - ACPI_PLD_SET*
 113 *        (Intended for BIOS use only)
 114 */
 115#define ACPI_PLD_REV1_BUFFER_SIZE               16      /* For Revision 1 of the buffer (From ACPI spec) */
 116#define ACPI_PLD_REV2_BUFFER_SIZE               20      /* For Revision 2 of the buffer (From ACPI spec) */
 117#define ACPI_PLD_BUFFER_SIZE                    20      /* For Revision 2 of the buffer (From ACPI spec) */
 118
 119/* First 32-bit dword, bits 0:32 */
 120
 121#define ACPI_PLD_GET_REVISION(dword)            ACPI_GET_BITS (dword, 0, ACPI_7BIT_MASK)
 122#define ACPI_PLD_SET_REVISION(dword,value)      ACPI_SET_BITS (dword, 0, ACPI_7BIT_MASK, value) /* Offset 0, Len 7 */
 123
 124#define ACPI_PLD_GET_IGNORE_COLOR(dword)        ACPI_GET_BITS (dword, 7, ACPI_1BIT_MASK)
 125#define ACPI_PLD_SET_IGNORE_COLOR(dword,value)  ACPI_SET_BITS (dword, 7, ACPI_1BIT_MASK, value) /* Offset 7, Len 1 */
 126
 127#define ACPI_PLD_GET_RED(dword)                 ACPI_GET_BITS (dword, 8, ACPI_8BIT_MASK)
 128#define ACPI_PLD_SET_RED(dword,value)           ACPI_SET_BITS (dword, 8, ACPI_8BIT_MASK, value) /* Offset 8, Len 8 */
 129
 130#define ACPI_PLD_GET_GREEN(dword)               ACPI_GET_BITS (dword, 16, ACPI_8BIT_MASK)
 131#define ACPI_PLD_SET_GREEN(dword,value)         ACPI_SET_BITS (dword, 16, ACPI_8BIT_MASK, value)        /* Offset 16, Len 8 */
 132
 133#define ACPI_PLD_GET_BLUE(dword)                ACPI_GET_BITS (dword, 24, ACPI_8BIT_MASK)
 134#define ACPI_PLD_SET_BLUE(dword,value)          ACPI_SET_BITS (dword, 24, ACPI_8BIT_MASK, value)        /* Offset 24, Len 8 */
 135
 136/* Second 32-bit dword, bits 33:63 */
 137
 138#define ACPI_PLD_GET_WIDTH(dword)               ACPI_GET_BITS (dword, 0, ACPI_16BIT_MASK)
 139#define ACPI_PLD_SET_WIDTH(dword,value)         ACPI_SET_BITS (dword, 0, ACPI_16BIT_MASK, value)        /* Offset 32+0=32, Len 16 */
 140
 141#define ACPI_PLD_GET_HEIGHT(dword)              ACPI_GET_BITS (dword, 16, ACPI_16BIT_MASK)
 142#define ACPI_PLD_SET_HEIGHT(dword,value)        ACPI_SET_BITS (dword, 16, ACPI_16BIT_MASK, value)       /* Offset 32+16=48, Len 16 */
 143
 144/* Third 32-bit dword, bits 64:95 */
 145
 146#define ACPI_PLD_GET_USER_VISIBLE(dword)        ACPI_GET_BITS (dword, 0, ACPI_1BIT_MASK)
 147#define ACPI_PLD_SET_USER_VISIBLE(dword,value)  ACPI_SET_BITS (dword, 0, ACPI_1BIT_MASK, value) /* Offset 64+0=64, Len 1 */
 148
 149#define ACPI_PLD_GET_DOCK(dword)                ACPI_GET_BITS (dword, 1, ACPI_1BIT_MASK)
 150#define ACPI_PLD_SET_DOCK(dword,value)          ACPI_SET_BITS (dword, 1, ACPI_1BIT_MASK, value) /* Offset 64+1=65, Len 1 */
 151
 152#define ACPI_PLD_GET_LID(dword)                 ACPI_GET_BITS (dword, 2, ACPI_1BIT_MASK)
 153#define ACPI_PLD_SET_LID(dword,value)           ACPI_SET_BITS (dword, 2, ACPI_1BIT_MASK, value) /* Offset 64+2=66, Len 1 */
 154
 155#define ACPI_PLD_GET_PANEL(dword)               ACPI_GET_BITS (dword, 3, ACPI_3BIT_MASK)
 156#define ACPI_PLD_SET_PANEL(dword,value)         ACPI_SET_BITS (dword, 3, ACPI_3BIT_MASK, value) /* Offset 64+3=67, Len 3 */
 157
 158#define ACPI_PLD_GET_VERTICAL(dword)            ACPI_GET_BITS (dword, 6, ACPI_2BIT_MASK)
 159#define ACPI_PLD_SET_VERTICAL(dword,value)      ACPI_SET_BITS (dword, 6, ACPI_2BIT_MASK, value) /* Offset 64+6=70, Len 2 */
 160
 161#define ACPI_PLD_GET_HORIZONTAL(dword)          ACPI_GET_BITS (dword, 8, ACPI_2BIT_MASK)
 162#define ACPI_PLD_SET_HORIZONTAL(dword,value)    ACPI_SET_BITS (dword, 8, ACPI_2BIT_MASK, value) /* Offset 64+8=72, Len 2 */
 163
 164#define ACPI_PLD_GET_SHAPE(dword)               ACPI_GET_BITS (dword, 10, ACPI_4BIT_MASK)
 165#define ACPI_PLD_SET_SHAPE(dword,value)         ACPI_SET_BITS (dword, 10, ACPI_4BIT_MASK, value)        /* Offset 64+10=74, Len 4 */
 166
 167#define ACPI_PLD_GET_ORIENTATION(dword)         ACPI_GET_BITS (dword, 14, ACPI_1BIT_MASK)
 168#define ACPI_PLD_SET_ORIENTATION(dword,value)   ACPI_SET_BITS (dword, 14, ACPI_1BIT_MASK, value)        /* Offset 64+14=78, Len 1 */
 169
 170#define ACPI_PLD_GET_TOKEN(dword)               ACPI_GET_BITS (dword, 15, ACPI_8BIT_MASK)
 171#define ACPI_PLD_SET_TOKEN(dword,value)         ACPI_SET_BITS (dword, 15, ACPI_8BIT_MASK, value)        /* Offset 64+15=79, Len 8 */
 172
 173#define ACPI_PLD_GET_POSITION(dword)            ACPI_GET_BITS (dword, 23, ACPI_8BIT_MASK)
 174#define ACPI_PLD_SET_POSITION(dword,value)      ACPI_SET_BITS (dword, 23, ACPI_8BIT_MASK, value)        /* Offset 64+23=87, Len 8 */
 175
 176#define ACPI_PLD_GET_BAY(dword)                 ACPI_GET_BITS (dword, 31, ACPI_1BIT_MASK)
 177#define ACPI_PLD_SET_BAY(dword,value)           ACPI_SET_BITS (dword, 31, ACPI_1BIT_MASK, value)        /* Offset 64+31=95, Len 1 */
 178
 179/* Fourth 32-bit dword, bits 96:127 */
 180
 181#define ACPI_PLD_GET_EJECTABLE(dword)           ACPI_GET_BITS (dword, 0, ACPI_1BIT_MASK)
 182#define ACPI_PLD_SET_EJECTABLE(dword,value)     ACPI_SET_BITS (dword, 0, ACPI_1BIT_MASK, value) /* Offset 96+0=96, Len 1 */
 183
 184#define ACPI_PLD_GET_OSPM_EJECT(dword)          ACPI_GET_BITS (dword, 1, ACPI_1BIT_MASK)
 185#define ACPI_PLD_SET_OSPM_EJECT(dword,value)    ACPI_SET_BITS (dword, 1, ACPI_1BIT_MASK, value) /* Offset 96+1=97, Len 1 */
 186
 187#define ACPI_PLD_GET_CABINET(dword)             ACPI_GET_BITS (dword, 2, ACPI_8BIT_MASK)
 188#define ACPI_PLD_SET_CABINET(dword,value)       ACPI_SET_BITS (dword, 2, ACPI_8BIT_MASK, value) /* Offset 96+2=98, Len 8 */
 189
 190#define ACPI_PLD_GET_CARD_CAGE(dword)           ACPI_GET_BITS (dword, 10, ACPI_8BIT_MASK)
 191#define ACPI_PLD_SET_CARD_CAGE(dword,value)     ACPI_SET_BITS (dword, 10, ACPI_8BIT_MASK, value)        /* Offset 96+10=106, Len 8 */
 192
 193#define ACPI_PLD_GET_REFERENCE(dword)           ACPI_GET_BITS (dword, 18, ACPI_1BIT_MASK)
 194#define ACPI_PLD_SET_REFERENCE(dword,value)     ACPI_SET_BITS (dword, 18, ACPI_1BIT_MASK, value)        /* Offset 96+18=114, Len 1 */
 195
 196#define ACPI_PLD_GET_ROTATION(dword)            ACPI_GET_BITS (dword, 19, ACPI_4BIT_MASK)
 197#define ACPI_PLD_SET_ROTATION(dword,value)      ACPI_SET_BITS (dword, 19, ACPI_4BIT_MASK, value)        /* Offset 96+19=115, Len 4 */
 198
 199#define ACPI_PLD_GET_ORDER(dword)               ACPI_GET_BITS (dword, 23, ACPI_5BIT_MASK)
 200#define ACPI_PLD_SET_ORDER(dword,value)         ACPI_SET_BITS (dword, 23, ACPI_5BIT_MASK, value)        /* Offset 96+23=119, Len 5 */
 201
 202/* Fifth 32-bit dword, bits 128:159 (Revision 2 of _PLD only) */
 203
 204#define ACPI_PLD_GET_VERT_OFFSET(dword)         ACPI_GET_BITS (dword, 0, ACPI_16BIT_MASK)
 205#define ACPI_PLD_SET_VERT_OFFSET(dword,value)   ACPI_SET_BITS (dword, 0, ACPI_16BIT_MASK, value)        /* Offset 128+0=128, Len 16 */
 206
 207#define ACPI_PLD_GET_HORIZ_OFFSET(dword)        ACPI_GET_BITS (dword, 16, ACPI_16BIT_MASK)
 208#define ACPI_PLD_SET_HORIZ_OFFSET(dword,value)  ACPI_SET_BITS (dword, 16, ACPI_16BIT_MASK, value)       /* Offset 128+16=144, Len 16 */
 209
 210#endif                          /* ACBUFFER_H */
 211