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303681f4 PLB |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // Copyright (c) 2015-2019 Intel Corporation | |
3 | ||
4 | #include <linux/acpi.h> | |
5 | #include <sound/intel-nhlt.h> | |
6 | ||
7 | #define NHLT_ACPI_HEADER_SIG "NHLT" | |
8 | ||
9 | /* Unique identification for getting NHLT blobs */ | |
10 | static guid_t osc_guid = | |
11 | GUID_INIT(0xA69F886E, 0x6CEB, 0x4594, | |
12 | 0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53); | |
13 | ||
14 | struct nhlt_acpi_table *intel_nhlt_init(struct device *dev) | |
15 | { | |
16 | acpi_handle handle; | |
17 | union acpi_object *obj; | |
18 | struct nhlt_resource_desc *nhlt_ptr; | |
19 | struct nhlt_acpi_table *nhlt_table = NULL; | |
20 | ||
21 | handle = ACPI_HANDLE(dev); | |
22 | if (!handle) { | |
23 | dev_err(dev, "Didn't find ACPI_HANDLE\n"); | |
24 | return NULL; | |
25 | } | |
26 | ||
27 | obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL); | |
28 | ||
29 | if (!obj) | |
30 | return NULL; | |
31 | ||
32 | if (obj->type != ACPI_TYPE_BUFFER) { | |
33 | dev_dbg(dev, "No NHLT table found\n"); | |
34 | ACPI_FREE(obj); | |
35 | return NULL; | |
36 | } | |
37 | ||
38 | nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer; | |
39 | if (nhlt_ptr->length) | |
40 | nhlt_table = (struct nhlt_acpi_table *) | |
41 | memremap(nhlt_ptr->min_addr, nhlt_ptr->length, | |
42 | MEMREMAP_WB); | |
43 | ACPI_FREE(obj); | |
44 | if (nhlt_table && | |
45 | (strncmp(nhlt_table->header.signature, | |
46 | NHLT_ACPI_HEADER_SIG, | |
47 | strlen(NHLT_ACPI_HEADER_SIG)) != 0)) { | |
48 | memunmap(nhlt_table); | |
49 | dev_err(dev, "NHLT ACPI header signature incorrect\n"); | |
50 | return NULL; | |
51 | } | |
52 | return nhlt_table; | |
53 | } | |
54 | EXPORT_SYMBOL_GPL(intel_nhlt_init); | |
55 | ||
56 | void intel_nhlt_free(struct nhlt_acpi_table *nhlt) | |
57 | { | |
58 | memunmap((void *)nhlt); | |
59 | } | |
60 | EXPORT_SYMBOL_GPL(intel_nhlt_free); | |
61 | ||
62 | int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt) | |
63 | { | |
64 | struct nhlt_endpoint *epnt; | |
65 | struct nhlt_dmic_array_config *cfg; | |
7a33ea70 | 66 | struct nhlt_vendor_dmic_array_config *cfg_vendor; |
303681f4 PLB |
67 | unsigned int dmic_geo = 0; |
68 | u8 j; | |
69 | ||
70 | if (!nhlt) | |
71 | return 0; | |
72 | ||
73 | epnt = (struct nhlt_endpoint *)nhlt->desc; | |
74 | ||
75 | for (j = 0; j < nhlt->endpoint_count; j++) { | |
76 | if (epnt->linktype == NHLT_LINK_DMIC) { | |
77 | cfg = (struct nhlt_dmic_array_config *) | |
78 | (epnt->config.caps); | |
79 | switch (cfg->array_type) { | |
80 | case NHLT_MIC_ARRAY_2CH_SMALL: | |
81 | case NHLT_MIC_ARRAY_2CH_BIG: | |
82 | dmic_geo = MIC_ARRAY_2CH; | |
83 | break; | |
84 | ||
85 | case NHLT_MIC_ARRAY_4CH_1ST_GEOM: | |
86 | case NHLT_MIC_ARRAY_4CH_L_SHAPED: | |
87 | case NHLT_MIC_ARRAY_4CH_2ND_GEOM: | |
88 | dmic_geo = MIC_ARRAY_4CH; | |
89 | break; | |
7a33ea70 PLB |
90 | case NHLT_MIC_ARRAY_VENDOR_DEFINED: |
91 | cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg; | |
92 | dmic_geo = cfg_vendor->nb_mics; | |
93 | break; | |
303681f4 PLB |
94 | default: |
95 | dev_warn(dev, "undefined DMIC array_type 0x%0x\n", | |
96 | cfg->array_type); | |
97 | } | |
98 | } | |
99 | epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length); | |
100 | } | |
101 | ||
102 | return dmic_geo; | |
103 | } | |
104 | EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo); |