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 - 2023, 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
32 struct 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 */
44 struct 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
60 struct 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 */
77 struct 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 /* Panel position defined in _PLD section of ACPI Specification 6.3 */
211
212 #define ACPI_PLD_PANEL_TOP 0
213 #define ACPI_PLD_PANEL_BOTTOM 1
214 #define ACPI_PLD_PANEL_LEFT 2
215 #define ACPI_PLD_PANEL_RIGHT 3
216 #define ACPI_PLD_PANEL_FRONT 4
217 #define ACPI_PLD_PANEL_BACK 5
218 #define ACPI_PLD_PANEL_UNKNOWN 6
219
220 #endif /* ACBUFFER_H */
221
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