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1/*
2 * soc-apci.c - support for ACPI enumeration.
3 *
4 * Copyright (c) 2013-15, Intel Corporation.
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 */
16
17#include <sound/soc-acpi.h>
18
19struct snd_soc_acpi_mach *
20snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
21{
22 struct snd_soc_acpi_mach *mach;
23
24 for (mach = machines; mach->id[0]; mach++) {
25 if (acpi_dev_present(mach->id, NULL, -1)) {
26 if (mach->machine_quirk)
27 mach = mach->machine_quirk(mach);
28 return mach;
29 }
30 }
31 return NULL;
32}
33EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine);
34
35static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level,
36 void *context, void **ret)
37{
38 struct acpi_device *adev;
39 acpi_status status = AE_OK;
40 struct snd_soc_acpi_package_context *pkg_ctx = context;
41
42 pkg_ctx->data_valid = false;
43
44 if (acpi_bus_get_device(handle, &adev))
45 return AE_OK;
46
47 if (adev->status.present && adev->status.functional) {
48 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
49 union acpi_object *myobj = NULL;
50
51 status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
52 NULL, &buffer,
53 ACPI_TYPE_PACKAGE);
54 if (ACPI_FAILURE(status))
55 return AE_OK;
56
57 myobj = buffer.pointer;
58 if (!myobj || myobj->package.count != pkg_ctx->length) {
59 kfree(buffer.pointer);
60 return AE_OK;
61 }
62
63 status = acpi_extract_package(myobj,
64 pkg_ctx->format, pkg_ctx->state);
65 if (ACPI_FAILURE(status)) {
66 kfree(buffer.pointer);
67 return AE_OK;
68 }
69
70 kfree(buffer.pointer);
71 pkg_ctx->data_valid = true;
72 return AE_CTRL_TERMINATE;
73 }
74
75 return AE_OK;
76}
77
78bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
79 struct snd_soc_acpi_package_context *ctx)
80{
81 acpi_status status;
82
83 status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL);
84
85 if (ACPI_FAILURE(status) || !ctx->data_valid)
86 return false;
87
88 return true;
89}
90EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid);
91
92struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
93{
94 struct snd_soc_acpi_mach *mach = arg;
95 struct snd_soc_acpi_codecs *codec_list =
96 (struct snd_soc_acpi_codecs *) mach->quirk_data;
97 int i;
98
99 if (mach->quirk_data == NULL)
100 return mach;
101
102 for (i = 0; i < codec_list->num_codecs; i++) {
103 if (!acpi_dev_present(codec_list->codecs[i], NULL, -1))
104 return NULL;
105 }
106
107 return mach;
108}
109EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
110
111MODULE_LICENSE("GPL v2");
112MODULE_DESCRIPTION("ALSA SoC ACPI module");
1// SPDX-License-Identifier: GPL-2.0
2//
3// soc-apci.c - support for ACPI enumeration.
4//
5// Copyright (c) 2013-15, Intel Corporation.
6
7#include <linux/export.h>
8#include <linux/module.h>
9#include <sound/soc-acpi.h>
10
11struct snd_soc_acpi_mach *
12snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
13{
14 struct snd_soc_acpi_mach *mach;
15 struct snd_soc_acpi_mach *mach_alt;
16
17 for (mach = machines; mach->id[0]; mach++) {
18 if (acpi_dev_present(mach->id, NULL, -1)) {
19 if (mach->machine_quirk) {
20 mach_alt = mach->machine_quirk(mach);
21 if (!mach_alt)
22 continue; /* not full match, ignore */
23 mach = mach_alt;
24 }
25
26 return mach;
27 }
28 }
29 return NULL;
30}
31EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine);
32
33static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level,
34 void *context, void **ret)
35{
36 struct acpi_device *adev;
37 acpi_status status = AE_OK;
38 struct snd_soc_acpi_package_context *pkg_ctx = context;
39
40 pkg_ctx->data_valid = false;
41
42 if (acpi_bus_get_device(handle, &adev))
43 return AE_OK;
44
45 if (adev->status.present && adev->status.functional) {
46 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
47 union acpi_object *myobj = NULL;
48
49 status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
50 NULL, &buffer,
51 ACPI_TYPE_PACKAGE);
52 if (ACPI_FAILURE(status))
53 return AE_OK;
54
55 myobj = buffer.pointer;
56 if (!myobj || myobj->package.count != pkg_ctx->length) {
57 kfree(buffer.pointer);
58 return AE_OK;
59 }
60
61 status = acpi_extract_package(myobj,
62 pkg_ctx->format, pkg_ctx->state);
63 if (ACPI_FAILURE(status)) {
64 kfree(buffer.pointer);
65 return AE_OK;
66 }
67
68 kfree(buffer.pointer);
69 pkg_ctx->data_valid = true;
70 return AE_CTRL_TERMINATE;
71 }
72
73 return AE_OK;
74}
75
76bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
77 struct snd_soc_acpi_package_context *ctx)
78{
79 acpi_status status;
80
81 status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL);
82
83 if (ACPI_FAILURE(status) || !ctx->data_valid)
84 return false;
85
86 return true;
87}
88EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid);
89
90struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
91{
92 struct snd_soc_acpi_mach *mach = arg;
93 struct snd_soc_acpi_codecs *codec_list =
94 (struct snd_soc_acpi_codecs *) mach->quirk_data;
95 int i;
96
97 if (mach->quirk_data == NULL)
98 return mach;
99
100 for (i = 0; i < codec_list->num_codecs; i++) {
101 if (!acpi_dev_present(codec_list->codecs[i], NULL, -1))
102 return NULL;
103 }
104
105 return mach;
106}
107EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
108
109MODULE_LICENSE("GPL v2");
110MODULE_DESCRIPTION("ALSA SoC ACPI module");