1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/*******************************************************************************
3 *
4 * Module Name: rsirq - IRQ resource descriptors
5 *
6 ******************************************************************************/
7
8#include <acpi/acpi.h>
9#include "accommon.h"
10#include "acresrc.h"
11
12#define _COMPONENT ACPI_RESOURCES
13ACPI_MODULE_NAME("rsirq")
14
15/*******************************************************************************
16 *
17 * acpi_rs_get_irq
18 *
19 ******************************************************************************/
20struct acpi_rsconvert_info acpi_rs_get_irq[9] = {
21 {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_IRQ,
22 ACPI_RS_SIZE(struct acpi_resource_irq),
23 ACPI_RSC_TABLE_SIZE(acpi_rs_get_irq)},
24
25 /* Get the IRQ mask (bytes 1:2) */
26
27 {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
28 AML_OFFSET(irq.irq_mask),
29 ACPI_RS_OFFSET(data.irq.interrupt_count)},
30
31 /* Set default flags (others are zero) */
32
33 {ACPI_RSC_SET8, ACPI_RS_OFFSET(data.irq.triggering),
34 ACPI_EDGE_SENSITIVE,
35 1},
36
37 /* Get the descriptor length (2 or 3 for IRQ descriptor) */
38
39 {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.irq.descriptor_length),
40 AML_OFFSET(irq.descriptor_type),
41 0},
42
43 /* All done if no flag byte present in descriptor */
44
45 {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_AML_LENGTH, 0, 3},
46
47 /* Get flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
48
49 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
50 AML_OFFSET(irq.flags),
51 0},
52
53 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
54 AML_OFFSET(irq.flags),
55 3},
56
57 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.shareable),
58 AML_OFFSET(irq.flags),
59 4},
60
61 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
62 AML_OFFSET(irq.flags),
63 5}
64};
65
66/*******************************************************************************
67 *
68 * acpi_rs_set_irq
69 *
70 ******************************************************************************/
71
72struct acpi_rsconvert_info acpi_rs_set_irq[14] = {
73 /* Start with a default descriptor of length 3 */
74
75 {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_IRQ,
76 sizeof(struct aml_resource_irq),
77 ACPI_RSC_TABLE_SIZE(acpi_rs_set_irq)},
78
79 /* Convert interrupt list to 16-bit IRQ bitmask */
80
81 {ACPI_RSC_BITMASK16, ACPI_RS_OFFSET(data.irq.interrupts[0]),
82 AML_OFFSET(irq.irq_mask),
83 ACPI_RS_OFFSET(data.irq.interrupt_count)},
84
85 /* Set flags: Triggering[0], Polarity[3], Sharing[4], Wake[5] */
86
87 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.triggering),
88 AML_OFFSET(irq.flags),
89 0},
90
91 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.polarity),
92 AML_OFFSET(irq.flags),
93 3},
94
95 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.shareable),
96 AML_OFFSET(irq.flags),
97 4},
98
99 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.irq.wake_capable),
100 AML_OFFSET(irq.flags),
101 5},
102
103 /*
104 * All done if the output descriptor length is required to be 3
105 * (i.e., optimization to 2 bytes cannot be attempted)
106 */
107 {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
108 ACPI_RS_OFFSET(data.irq.descriptor_length),
109 3},
110
111 /* Set length to 2 bytes (no flags byte) */
112
113 {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)},
114
115 /*
116 * All done if the output descriptor length is required to be 2.
117 *
118 * TBD: Perhaps we should check for error if input flags are not
119 * compatible with a 2-byte descriptor.
120 */
121 {ACPI_RSC_EXIT_EQ, ACPI_RSC_COMPARE_VALUE,
122 ACPI_RS_OFFSET(data.irq.descriptor_length),
123 2},
124
125 /* Reset length to 3 bytes (descriptor with flags byte) */
126
127 {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq)},
128
129 /*
130 * Check if the flags byte is necessary. Not needed if the flags are:
131 * ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_HIGH, ACPI_EXCLUSIVE
132 */
133 {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
134 ACPI_RS_OFFSET(data.irq.triggering),
135 ACPI_EDGE_SENSITIVE},
136
137 {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
138 ACPI_RS_OFFSET(data.irq.polarity),
139 ACPI_ACTIVE_HIGH},
140
141 {ACPI_RSC_EXIT_NE, ACPI_RSC_COMPARE_VALUE,
142 ACPI_RS_OFFSET(data.irq.shareable),
143 ACPI_EXCLUSIVE},
144
145 /* We can optimize to a 2-byte irq_no_flags() descriptor */
146
147 {ACPI_RSC_LENGTH, 0, 0, sizeof(struct aml_resource_irq_noflags)}
148};
149
150/*******************************************************************************
151 *
152 * acpi_rs_convert_ext_irq
153 *
154 ******************************************************************************/
155
156struct acpi_rsconvert_info acpi_rs_convert_ext_irq[10] = {
157 {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_EXTENDED_IRQ,
158 ACPI_RS_SIZE(struct acpi_resource_extended_irq),
159 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_ext_irq)},
160
161 {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_EXTENDED_IRQ,
162 sizeof(struct aml_resource_extended_irq),
163 0},
164
165 /*
166 * Flags: Producer/Consumer[0], Triggering[1], Polarity[2],
167 * Sharing[3], Wake[4]
168 */
169 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.producer_consumer),
170 AML_OFFSET(extended_irq.flags),
171 0},
172
173 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.triggering),
174 AML_OFFSET(extended_irq.flags),
175 1},
176
177 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.polarity),
178 AML_OFFSET(extended_irq.flags),
179 2},
180
181 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.shareable),
182 AML_OFFSET(extended_irq.flags),
183 3},
184
185 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.extended_irq.wake_capable),
186 AML_OFFSET(extended_irq.flags),
187 4},
188
189 /* IRQ Table length (Byte4) */
190
191 {ACPI_RSC_COUNT, ACPI_RS_OFFSET(data.extended_irq.interrupt_count),
192 AML_OFFSET(extended_irq.interrupt_count),
193 sizeof(u32)},
194
195 /* Copy every IRQ in the table, each is 32 bits */
196
197 {ACPI_RSC_MOVE32, ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
198 AML_OFFSET(extended_irq.interrupts[0]),
199 0},
200
201 /* Optional resource_source (Index and String) */
202
203 {ACPI_RSC_SOURCEX, ACPI_RS_OFFSET(data.extended_irq.resource_source),
204 ACPI_RS_OFFSET(data.extended_irq.interrupts[0]),
205 sizeof(struct aml_resource_extended_irq)}
206};
207
208/*******************************************************************************
209 *
210 * acpi_rs_convert_dma
211 *
212 ******************************************************************************/
213
214struct acpi_rsconvert_info acpi_rs_convert_dma[6] = {
215 {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_DMA,
216 ACPI_RS_SIZE(struct acpi_resource_dma),
217 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_dma)},
218
219 {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_DMA,
220 sizeof(struct aml_resource_dma),
221 0},
222
223 /* Flags: transfer preference, bus mastering, channel speed */
224
225 {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.transfer),
226 AML_OFFSET(dma.flags),
227 0},
228
229 {ACPI_RSC_1BITFLAG, ACPI_RS_OFFSET(data.dma.bus_master),
230 AML_OFFSET(dma.flags),
231 2},
232
233 {ACPI_RSC_2BITFLAG, ACPI_RS_OFFSET(data.dma.type),
234 AML_OFFSET(dma.flags),
235 5},
236
237 /* DMA channel mask bits */
238
239 {ACPI_RSC_BITMASK, ACPI_RS_OFFSET(data.dma.channels[0]),
240 AML_OFFSET(dma.dma_channel_mask),
241 ACPI_RS_OFFSET(data.dma.channel_count)}
242};
243
244/*******************************************************************************
245 *
246 * acpi_rs_convert_fixed_dma
247 *
248 ******************************************************************************/
249
250struct acpi_rsconvert_info acpi_rs_convert_fixed_dma[4] = {
251 {ACPI_RSC_INITGET, ACPI_RESOURCE_TYPE_FIXED_DMA,
252 ACPI_RS_SIZE(struct acpi_resource_fixed_dma),
253 ACPI_RSC_TABLE_SIZE(acpi_rs_convert_fixed_dma)},
254
255 {ACPI_RSC_INITSET, ACPI_RESOURCE_NAME_FIXED_DMA,
256 sizeof(struct aml_resource_fixed_dma),
257 0},
258
259 /*
260 * These fields are contiguous in both the source and destination:
261 * request_lines
262 * Channels
263 */
264 {ACPI_RSC_MOVE16, ACPI_RS_OFFSET(data.fixed_dma.request_lines),
265 AML_OFFSET(fixed_dma.request_lines),
266 2},
267
268 {ACPI_RSC_MOVE8, ACPI_RS_OFFSET(data.fixed_dma.width),
269 AML_OFFSET(fixed_dma.width),
270 1},
271};
272

source code of linux/drivers/acpi/acpica/rsirq.c