1// SPDX-License-Identifier: GPL-2.0-only
 2// Copyright (c) 2015-2019 Intel Corporation
 3
 4#include <linux/acpi.h>
 5#include <sound/intel-nhlt.h>
 6
 7struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
 8{
 9	struct nhlt_acpi_table *nhlt;
10	acpi_status status;
11
12	status = acpi_get_table(ACPI_SIG_NHLT, 0,
13				(struct acpi_table_header **)&nhlt);
14	if (ACPI_FAILURE(status)) {
15		dev_warn(dev, "NHLT table not found\n");
16		return NULL;
17	}
18
19	return nhlt;
20}
21EXPORT_SYMBOL_GPL(intel_nhlt_init);
22
23void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
24{
25	acpi_put_table((struct acpi_table_header *)nhlt);
26}
27EXPORT_SYMBOL_GPL(intel_nhlt_free);
28
29int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
30{
31	struct nhlt_endpoint *epnt;
32	struct nhlt_dmic_array_config *cfg;
33	struct nhlt_vendor_dmic_array_config *cfg_vendor;
34	unsigned int dmic_geo = 0;
35	u8 j;
36
37	if (!nhlt)
38		return 0;
39
40	epnt = (struct nhlt_endpoint *)nhlt->desc;
41
42	for (j = 0; j < nhlt->endpoint_count; j++) {
43		if (epnt->linktype == NHLT_LINK_DMIC) {
44			cfg = (struct nhlt_dmic_array_config  *)
45					(epnt->config.caps);
46			switch (cfg->array_type) {
47			case NHLT_MIC_ARRAY_2CH_SMALL:
48			case NHLT_MIC_ARRAY_2CH_BIG:
49				dmic_geo = MIC_ARRAY_2CH;
50				break;
51
52			case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
53			case NHLT_MIC_ARRAY_4CH_L_SHAPED:
54			case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
55				dmic_geo = MIC_ARRAY_4CH;
56				break;
57			case NHLT_MIC_ARRAY_VENDOR_DEFINED:
58				cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
59				dmic_geo = cfg_vendor->nb_mics;
60				break;
61			default:
62				dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
63					 cfg->array_type);
64			}
65		}
66		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
67	}
68
69	return dmic_geo;
70}
71EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);