// SPDX-License-Identifier: GPL-2.0-only

  // Copyright (c) 2015-2019 Intel Corporation
  
  #include <linux/acpi.h>
  #include <sound/intel-nhlt.h>

  struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
  {

  	struct nhlt_acpi_table *nhlt;
  	acpi_status status;

  	status = acpi_get_table(ACPI_SIG_NHLT, 0,
  				(struct acpi_table_header **)&nhlt);
  	if (ACPI_FAILURE(status)) {
  		dev_warn(dev, "NHLT table not found
  ");

  		return NULL;
  	}

  	return nhlt;

  }
  EXPORT_SYMBOL_GPL(intel_nhlt_init);
  
  void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
  {

  	acpi_put_table((struct acpi_table_header *)nhlt);

  }
  EXPORT_SYMBOL_GPL(intel_nhlt_free);
  
  int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
  {
  	struct nhlt_endpoint *epnt;
  	struct nhlt_dmic_array_config *cfg;

  	struct nhlt_vendor_dmic_array_config *cfg_vendor;

  	unsigned int dmic_geo = 0;
  	u8 j;
  
  	if (!nhlt)
  		return 0;
  
  	epnt = (struct nhlt_endpoint *)nhlt->desc;
  
  	for (j = 0; j < nhlt->endpoint_count; j++) {
  		if (epnt->linktype == NHLT_LINK_DMIC) {
  			cfg = (struct nhlt_dmic_array_config  *)
  					(epnt->config.caps);
  			switch (cfg->array_type) {
  			case NHLT_MIC_ARRAY_2CH_SMALL:
  			case NHLT_MIC_ARRAY_2CH_BIG:
  				dmic_geo = MIC_ARRAY_2CH;
  				break;
  
  			case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
  			case NHLT_MIC_ARRAY_4CH_L_SHAPED:
  			case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
  				dmic_geo = MIC_ARRAY_4CH;
  				break;

  			case NHLT_MIC_ARRAY_VENDOR_DEFINED:
  				cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
  				dmic_geo = cfg_vendor->nb_mics;
  				break;

  			default:
  				dev_warn(dev, "undefined DMIC array_type 0x%0x
  ",
  					 cfg->array_type);
  			}
  		}
  		epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
  	}
  
  	return dmic_geo;
  }
  EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);