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7#include <linux/export.h>
8#include <linux/module.h>
9#include <sound/soc-acpi.h>
10
11static bool snd_soc_acpi_id_present(struct snd_soc_acpi_mach *machine)
12{
13 const struct snd_soc_acpi_codecs *comp_ids = machine->comp_ids;
14 int i;
15
16 if (machine->id[0]) {
17 if (acpi_dev_present(machine->id, NULL, -1))
18 return true;
19 }
20
21 if (comp_ids) {
22 for (i = 0; i < comp_ids->num_codecs; i++) {
23 if (acpi_dev_present(comp_ids->codecs[i], NULL, -1)) {
24 strscpy(machine->id, comp_ids->codecs[i], ACPI_ID_LEN);
25 return true;
26 }
27 }
28 }
29
30 return false;
31}
32
33struct snd_soc_acpi_mach *
34snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
35{
36 struct snd_soc_acpi_mach *mach;
37 struct snd_soc_acpi_mach *mach_alt;
38
39 for (mach = machines; mach->id[0] || mach->comp_ids; mach++) {
40 if (snd_soc_acpi_id_present(mach)) {
41 if (mach->machine_quirk) {
42 mach_alt = mach->machine_quirk(mach);
43 if (!mach_alt)
44 continue;
45 mach = mach_alt;
46 }
47
48 return mach;
49 }
50 }
51 return NULL;
52}
53EXPORT_SYMBOL_GPL(snd_soc_acpi_find_machine);
54
55static acpi_status snd_soc_acpi_find_package(acpi_handle handle, u32 level,
56 void *context, void **ret)
57{
58 struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
59 acpi_status status;
60 struct snd_soc_acpi_package_context *pkg_ctx = context;
61
62 pkg_ctx->data_valid = false;
63
64 if (adev && adev->status.present && adev->status.functional) {
65 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
66 union acpi_object *myobj = NULL;
67
68 status = acpi_evaluate_object_typed(handle, pkg_ctx->name,
69 NULL, &buffer,
70 ACPI_TYPE_PACKAGE);
71 if (ACPI_FAILURE(status))
72 return AE_OK;
73
74 myobj = buffer.pointer;
75 if (!myobj || myobj->package.count != pkg_ctx->length) {
76 kfree(buffer.pointer);
77 return AE_OK;
78 }
79
80 status = acpi_extract_package(myobj,
81 pkg_ctx->format, pkg_ctx->state);
82 if (ACPI_FAILURE(status)) {
83 kfree(buffer.pointer);
84 return AE_OK;
85 }
86
87 kfree(buffer.pointer);
88 pkg_ctx->data_valid = true;
89 return AE_CTRL_TERMINATE;
90 }
91
92 return AE_OK;
93}
94
95bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
96 struct snd_soc_acpi_package_context *ctx)
97{
98 acpi_status status;
99
100 status = acpi_get_devices(hid, snd_soc_acpi_find_package, ctx, NULL);
101
102 if (ACPI_FAILURE(status) || !ctx->data_valid)
103 return false;
104
105 return true;
106}
107EXPORT_SYMBOL_GPL(snd_soc_acpi_find_package_from_hid);
108
109struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
110{
111 struct snd_soc_acpi_mach *mach = arg;
112 struct snd_soc_acpi_codecs *codec_list =
113 (struct snd_soc_acpi_codecs *) mach->quirk_data;
114 int i;
115
116 if (mach->quirk_data == NULL)
117 return mach;
118
119 for (i = 0; i < codec_list->num_codecs; i++) {
120 if (!acpi_dev_present(codec_list->codecs[i], NULL, -1))
121 return NULL;
122 }
123
124 return mach;
125}
126EXPORT_SYMBOL_GPL(snd_soc_acpi_codec_list);
127
128#define SDW_CODEC_ADR_MASK(_adr) ((_adr) & (SDW_DISCO_LINK_ID_MASK | SDW_VERSION_MASK | \
129 SDW_MFG_ID_MASK | SDW_PART_ID_MASK))
130
131
132bool snd_soc_acpi_sdw_link_slaves_found(struct device *dev,
133 const struct snd_soc_acpi_link_adr *link,
134 struct sdw_peripherals *peripherals)
135{
136 unsigned int part_id, link_id, unique_id, mfg_id, version;
137 int i, j, k;
138
139 for (i = 0; i < link->num_adr; i++) {
140 u64 adr = link->adr_d[i].adr;
141 int reported_part_count = 0;
142
143 mfg_id = SDW_MFG_ID(adr);
144 part_id = SDW_PART_ID(adr);
145 link_id = SDW_DISCO_LINK_ID(adr);
146 version = SDW_VERSION(adr);
147
148 for (j = 0; j < peripherals->num_peripherals; j++) {
149 struct sdw_slave *peripheral = peripherals->array[j];
150
151
152 if (peripheral->bus->link_id == link_id &&
153 peripheral->id.part_id == part_id &&
154 peripheral->id.mfg_id == mfg_id &&
155 peripheral->id.sdw_version == version)
156 reported_part_count++;
157 }
158
159 for (j = 0; j < peripherals->num_peripherals; j++) {
160 struct sdw_slave *peripheral = peripherals->array[j];
161 int expected_part_count = 0;
162
163 if (peripheral->bus->link_id != link_id ||
164 peripheral->id.part_id != part_id ||
165 peripheral->id.mfg_id != mfg_id ||
166 peripheral->id.sdw_version != version)
167 continue;
168
169
170 for (k = 0; k < link->num_adr; k++) {
171 u64 adr2 = link->adr_d[k].adr;
172
173 if (SDW_CODEC_ADR_MASK(adr2) == SDW_CODEC_ADR_MASK(adr))
174 expected_part_count++;
175 }
176
177 if (reported_part_count == expected_part_count) {
178
179
180
181
182
183 unique_id = SDW_UNIQUE_ID(adr);
184 if (reported_part_count == 1 ||
185 peripheral->id.unique_id == unique_id) {
186 dev_dbg(dev, "found part_id %#x at link %d\n", part_id, link_id);
187 break;
188 }
189 } else {
190 dev_dbg(dev, "part_id %#x reported %d expected %d on link %d, skipping\n",
191 part_id, reported_part_count, expected_part_count, link_id);
192 }
193 }
194 if (j == peripherals->num_peripherals) {
195 dev_dbg(dev, "Slave part_id %#x not found\n", part_id);
196 return false;
197 }
198 }
199 return true;
200}
201EXPORT_SYMBOL_GPL(snd_soc_acpi_sdw_link_slaves_found);
202
203MODULE_LICENSE("GPL v2");
204MODULE_DESCRIPTION("ALSA SoC ACPI module");
205
